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authorLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 15:37:24 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 15:37:24 -0800
commit7c7758f99d39d529a64d4f60d22129bbf2f16d74 (patch)
tree8847b5e56812fe4c4c812cfffc78e391a91f4ebe
parent67acd8b4b7a3f1b183ae358e1dfdb8a80e170736 (diff)
parent8a70da82edc50aa7a4b54864babf2d72538ba1bb (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6: (123 commits) wimax/i2400m: add CREDITS and MAINTAINERS entries wimax: export linux/wimax.h and linux/wimax/i2400m.h with headers_install i2400m: Makefile and Kconfig i2400m/SDIO: TX and RX path backends i2400m/SDIO: firmware upload backend i2400m/SDIO: probe/disconnect, dev init/shutdown and reset backends i2400m/SDIO: header for the SDIO subdriver i2400m/USB: TX and RX path backends i2400m/USB: firmware upload backend i2400m/USB: probe/disconnect, dev init/shutdown and reset backends i2400m/USB: header for the USB bus driver i2400m: debugfs controls i2400m: various functions for device management i2400m: RX and TX data/control paths i2400m: firmware loading and bootrom initialization i2400m: linkage to the networking stack i2400m: Generic probe/disconnect, reset and message passing i2400m: host/device procotol and core driver definitions i2400m: documentation and instructions for usage wimax: Makefile, Kconfig and docbook linkage for the stack ...
-rw-r--r--CREDITS17
-rw-r--r--Documentation/DocBook/networking.tmpl8
-rw-r--r--Documentation/kernel-parameters.txt36
-rw-r--r--Documentation/usb/power-management.txt22
-rw-r--r--Documentation/wimax/README.i2400m260
-rw-r--r--Documentation/wimax/README.wimax81
-rw-r--r--MAINTAINERS17
-rw-r--r--arch/arm/plat-mxc/include/mach/usb.h23
-rw-r--r--arch/arm/plat-omap/usb.c32
-rw-r--r--arch/powerpc/boot/dts/sequoia.dts2
-rw-r--r--drivers/Makefile1
-rw-r--r--drivers/block/ub.c11
-rw-r--r--drivers/hid/usbhid/hid-core.c9
-rw-r--r--drivers/i2c/chips/Kconfig12
-rw-r--r--drivers/i2c/chips/Makefile1
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-hdw.c2
-rw-r--r--drivers/net/Kconfig2
-rw-r--r--drivers/net/Makefile1
-rw-r--r--drivers/net/usb/kaweth.c6
-rw-r--r--drivers/net/usb/pegasus.c12
-rw-r--r--drivers/net/wimax/Kconfig17
-rw-r--r--drivers/net/wimax/Makefile5
-rw-r--r--drivers/net/wimax/i2400m/Kconfig49
-rw-r--r--drivers/net/wimax/i2400m/Makefile29
-rw-r--r--drivers/net/wimax/i2400m/control.c1291
-rw-r--r--drivers/net/wimax/i2400m/debug-levels.h45
-rw-r--r--drivers/net/wimax/i2400m/debugfs.c392
-rw-r--r--drivers/net/wimax/i2400m/driver.c728
-rw-r--r--drivers/net/wimax/i2400m/fw.c1095
-rw-r--r--drivers/net/wimax/i2400m/i2400m-sdio.h132
-rw-r--r--drivers/net/wimax/i2400m/i2400m-usb.h264
-rw-r--r--drivers/net/wimax/i2400m/i2400m.h755
-rw-r--r--drivers/net/wimax/i2400m/netdev.c524
-rw-r--r--drivers/net/wimax/i2400m/op-rfkill.c207
-rw-r--r--drivers/net/wimax/i2400m/rx.c534
-rw-r--r--drivers/net/wimax/i2400m/sdio-debug-levels.h22
-rw-r--r--drivers/net/wimax/i2400m/sdio-fw.c224
-rw-r--r--drivers/net/wimax/i2400m/sdio-rx.c255
-rw-r--r--drivers/net/wimax/i2400m/sdio-tx.c153
-rw-r--r--drivers/net/wimax/i2400m/sdio.c511
-rw-r--r--drivers/net/wimax/i2400m/tx.c817
-rw-r--r--drivers/net/wimax/i2400m/usb-debug-levels.h42
-rw-r--r--drivers/net/wimax/i2400m/usb-fw.c340
-rw-r--r--drivers/net/wimax/i2400m/usb-notif.c269
-rw-r--r--drivers/net/wimax/i2400m/usb-rx.c417
-rw-r--r--drivers/net/wimax/i2400m/usb-tx.c229
-rw-r--r--drivers/net/wimax/i2400m/usb.c591
-rw-r--r--drivers/usb/Kconfig2
-rw-r--r--drivers/usb/class/cdc-acm.c2
-rw-r--r--drivers/usb/class/cdc-wdm.c3
-rw-r--r--drivers/usb/class/usbtmc.c9
-rw-r--r--drivers/usb/core/devio.c7
-rw-r--r--drivers/usb/core/driver.c181
-rw-r--r--drivers/usb/core/endpoint.c4
-rw-r--r--drivers/usb/core/generic.c10
-rw-r--r--drivers/usb/core/hcd-pci.c201
-rw-r--r--drivers/usb/core/hcd.c20
-rw-r--r--drivers/usb/core/hcd.h16
-rw-r--r--drivers/usb/core/hub.c142
-rw-r--r--drivers/usb/core/message.c164
-rw-r--r--drivers/usb/core/sysfs.c49
-rw-r--r--drivers/usb/core/urb.c43
-rw-r--r--drivers/usb/core/usb.c79
-rw-r--r--drivers/usb/core/usb.h24
-rw-r--r--drivers/usb/gadget/Kconfig43
-rw-r--r--drivers/usb/gadget/Makefile2
-rw-r--r--drivers/usb/gadget/ci13xxx_udc.c2830
-rw-r--r--drivers/usb/gadget/ci13xxx_udc.h195
-rw-r--r--drivers/usb/gadget/epautoconf.c2
-rw-r--r--drivers/usb/gadget/file_storage.c177
-rw-r--r--drivers/usb/gadget/fsl_qe_udc.c12
-rw-r--r--drivers/usb/gadget/gadget_chips.h8
-rw-r--r--drivers/usb/gadget/goku_udc.c2
-rw-r--r--drivers/usb/gadget/imx_udc.c1516
-rw-r--r--drivers/usb/gadget/imx_udc.h344
-rw-r--r--drivers/usb/gadget/m66592-udc.c9
-rw-r--r--drivers/usb/gadget/net2280.c2
-rw-r--r--drivers/usb/gadget/omap_udc.c4
-rw-r--r--drivers/usb/gadget/pxa25x_udc.c2
-rw-r--r--drivers/usb/gadget/pxa27x_udc.c2
-rw-r--r--drivers/usb/gadget/s3c2410_udc.c34
-rw-r--r--drivers/usb/host/Kconfig13
-rw-r--r--drivers/usb/host/Makefile1
-rw-r--r--drivers/usb/host/ehci-dbg.c8
-rw-r--r--drivers/usb/host/ehci-hub.c27
-rw-r--r--drivers/usb/host/ehci-pci.c12
-rw-r--r--drivers/usb/host/ehci-ppc-of.c45
-rw-r--r--drivers/usb/host/ehci.h34
-rw-r--r--drivers/usb/host/isp1760-hcd.c13
-rw-r--r--drivers/usb/host/isp1760-hcd.h1
-rw-r--r--drivers/usb/host/isp1760-if.c116
-rw-r--r--drivers/usb/host/ohci-hcd.c12
-rw-r--r--drivers/usb/host/ohci-pci.c6
-rw-r--r--drivers/usb/host/ohci-pnx4008.c85
-rw-r--r--drivers/usb/host/ohci-ppc-of.c25
-rw-r--r--drivers/usb/host/ohci-tmio.c2
-rw-r--r--drivers/usb/host/oxu210hp-hcd.c3985
-rw-r--r--drivers/usb/host/oxu210hp.h447
-rw-r--r--drivers/usb/host/pci-quirks.c14
-rw-r--r--drivers/usb/host/r8a66597-hcd.c8
-rw-r--r--drivers/usb/host/uhci-hcd.c2
-rw-r--r--drivers/usb/image/microtek.c11
-rw-r--r--drivers/usb/misc/berry_charge.c5
-rw-r--r--drivers/usb/misc/emi26.c2
-rw-r--r--drivers/usb/misc/usbtest.c2
-rw-r--r--drivers/usb/mon/Kconfig13
-rw-r--r--drivers/usb/mon/Makefile3
-rw-r--r--drivers/usb/musb/Kconfig12
-rw-r--r--drivers/usb/musb/Makefile8
-rw-r--r--drivers/usb/musb/blackfin.c320
-rw-r--r--drivers/usb/musb/blackfin.h52
-rw-r--r--drivers/usb/musb/davinci.c18
-rw-r--r--drivers/usb/musb/musb_core.c84
-rw-r--r--drivers/usb/musb/musb_core.h73
-rw-r--r--drivers/usb/musb/musb_gadget.c2
-rw-r--r--drivers/usb/musb/musb_host.c45
-rw-r--r--drivers/usb/musb/musb_io.h26
-rw-r--r--drivers/usb/musb/musb_regs.h397
-rw-r--r--drivers/usb/musb/musbhsdma.c84
-rw-r--r--drivers/usb/musb/musbhsdma.h149
-rw-r--r--drivers/usb/musb/omap2430.c15
-rw-r--r--drivers/usb/musb/tusb6010.c7
-rw-r--r--drivers/usb/otg/Kconfig54
-rw-r--r--drivers/usb/otg/Makefile15
-rw-r--r--drivers/usb/otg/gpio_vbus.c335
-rw-r--r--drivers/usb/otg/isp1301_omap.c (renamed from drivers/i2c/chips/isp1301_omap.c)0
-rw-r--r--drivers/usb/otg/otg.c65
-rw-r--r--drivers/usb/otg/twl4030-usb.c721
-rw-r--r--drivers/usb/serial/Kconfig17
-rw-r--r--drivers/usb/serial/Makefile2
-rw-r--r--drivers/usb/serial/digi_acceleport.c28
-rw-r--r--drivers/usb/serial/garmin_gps.c2
-rw-r--r--drivers/usb/serial/ipw.c4
-rw-r--r--drivers/usb/serial/iuu_phoenix.c38
-rw-r--r--drivers/usb/serial/mos7840.c38
-rw-r--r--drivers/usb/serial/opticon.c358
-rw-r--r--drivers/usb/serial/option.c11
-rw-r--r--drivers/usb/serial/siemens_mpi.c77
-rw-r--r--drivers/usb/serial/spcp8x5.c20
-rw-r--r--drivers/usb/serial/usb_debug.c2
-rw-r--r--drivers/usb/storage/Kconfig11
-rw-r--r--drivers/usb/storage/Makefile3
-rw-r--r--drivers/usb/storage/dpcm.c86
-rw-r--r--drivers/usb/storage/dpcm.h32
-rw-r--r--drivers/usb/storage/libusual.c7
-rw-r--r--drivers/usb/storage/option_ms.c147
-rw-r--r--drivers/usb/storage/option_ms.h4
-rw-r--r--drivers/usb/storage/protocol.c24
-rw-r--r--drivers/usb/storage/protocol.h3
-rw-r--r--drivers/usb/storage/scsiglue.c43
-rw-r--r--drivers/usb/storage/sddr09.c43
-rw-r--r--drivers/usb/storage/sddr09.h5
-rw-r--r--drivers/usb/storage/transport.c219
-rw-r--r--drivers/usb/storage/transport.h2
-rw-r--r--drivers/usb/storage/unusual_devs.h354
-rw-r--r--drivers/usb/storage/usb.c106
-rw-r--r--drivers/usb/storage/usb.h5
-rw-r--r--drivers/usb/wusbcore/rh.c2
-rw-r--r--fs/debugfs/file.c32
-rw-r--r--include/linux/Kbuild2
-rw-r--r--include/linux/debugfs.h2
-rw-r--r--include/linux/oxu210hp.h7
-rw-r--r--include/linux/usb.h30
-rw-r--r--include/linux/usb/association.h22
-rw-r--r--include/linux/usb/gpio_vbus.h30
-rw-r--r--include/linux/usb/musb.h5
-rw-r--r--include/linux/usb/otg.h1
-rw-r--r--include/linux/usb_usual.h7
-rw-r--r--include/linux/wimax.h234
-rw-r--r--include/linux/wimax/Kbuild1
-rw-r--r--include/linux/wimax/debug.h453
-rw-r--r--include/linux/wimax/i2400m.h512
-rw-r--r--include/net/wimax.h520
-rw-r--r--net/Kconfig2
-rw-r--r--net/Makefile1
-rw-r--r--net/netlink/genetlink.c1
-rw-r--r--net/wimax/Kconfig38
-rw-r--r--net/wimax/Makefile13
-rw-r--r--net/wimax/debug-levels.h42
-rw-r--r--net/wimax/debugfs.c90
-rw-r--r--net/wimax/id-table.c142
-rw-r--r--net/wimax/op-msg.c421
-rw-r--r--net/wimax/op-reset.c143
-rw-r--r--net/wimax/op-rfkill.c532
-rw-r--r--net/wimax/stack.c599
-rw-r--r--net/wimax/wimax-internal.h91
186 files changed, 28282 insertions, 1390 deletions
diff --git a/CREDITS b/CREDITS
index 61186c85d728..939da46a87fb 100644
--- a/CREDITS
+++ b/CREDITS
@@ -464,6 +464,11 @@ S: 1200 Goldenrod Dr.
S: Nampa, Idaho 83686
S: USA
+N: Dirk J. Brandewie
+E: dirk.j.brandewie@intel.com
+E: linux-wimax@intel.com
+D: Intel Wireless WiMAX Connection 2400 SDIO driver
+
N: Derrick J. Brashear
E: shadow@dementia.org
W: http://www.dementia.org/~shadow
@@ -2119,6 +2124,11 @@ N: H.J. Lu
E: hjl@gnu.ai.mit.edu
D: GCC + libraries hacker
+N: Yanir Lubetkin
+E: yanirx.lubatkin@intel.com
+E: linux-wimax@intel.com
+D: Intel Wireless WiMAX Connection 2400 driver
+
N: Michal Ludvig
E: michal@logix.cz
E: michal.ludvig@asterisk.co.nz
@@ -2693,6 +2703,13 @@ S: RR #5, 497 Pole Line Road
S: Thunder Bay, Ontario
S: CANADA P7C 5M9
+N: Inaky Perez-Gonzalez
+E: inaky.perez-gonzalez@intel.com
+E: linux-wimax@intel.com
+E: inakypg@yahoo.com
+D: WiMAX stack
+D: Intel Wireless WiMAX Connection 2400 driver
+
N: Yuri Per
E: yuri@pts.mipt.ru
D: Some smbfs fixes
diff --git a/Documentation/DocBook/networking.tmpl b/Documentation/DocBook/networking.tmpl
index 627707a3cb9d..59ad69a9d777 100644
--- a/Documentation/DocBook/networking.tmpl
+++ b/Documentation/DocBook/networking.tmpl
@@ -74,6 +74,14 @@
!Enet/sunrpc/rpcb_clnt.c
!Enet/sunrpc/clnt.c
</sect1>
+ <sect1><title>WiMAX</title>
+!Enet/wimax/op-msg.c
+!Enet/wimax/op-reset.c
+!Enet/wimax/op-rfkill.c
+!Enet/wimax/stack.c
+!Iinclude/net/wimax.h
+!Iinclude/linux/wimax.h
+ </sect1>
</chapter>
<chapter id="netdev">
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0b3f6711d2f1..a58fc8b73398 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -91,6 +91,7 @@ parameter is applicable:
SUSPEND System suspend states are enabled.
FTRACE Function tracing enabled.
TS Appropriate touchscreen support is enabled.
+ UMS USB Mass Storage support is enabled.
USB USB support is enabled.
USBHID USB Human Interface Device support is enabled.
V4L Video For Linux support is enabled.
@@ -2383,6 +2384,41 @@ and is between 256 and 4096 characters. It is defined in the file
usbhid.mousepoll=
[USBHID] The interval which mice are to be polled at.
+ usb-storage.delay_use=
+ [UMS] The delay in seconds before a new device is
+ scanned for Logical Units (default 5).
+
+ usb-storage.quirks=
+ [UMS] A list of quirks entries to supplement or
+ override the built-in unusual_devs list. List
+ entries are separated by commas. Each entry has
+ the form VID:PID:Flags where VID and PID are Vendor
+ and Product ID values (4-digit hex numbers) and
+ Flags is a set of characters, each corresponding
+ to a common usb-storage quirk flag as follows:
+ a = SANE_SENSE (collect more than 18 bytes
+ of sense data);
+ c = FIX_CAPACITY (decrease the reported
+ device capacity by one sector);
+ h = CAPACITY_HEURISTICS (decrease the
+ reported device capacity by one
+ sector if the number is odd);
+ i = IGNORE_DEVICE (don't bind to this
+ device);
+ l = NOT_LOCKABLE (don't try to lock and
+ unlock ejectable media);
+ m = MAX_SECTORS_64 (don't transfer more
+ than 64 sectors = 32 KB at a time);
+ o = CAPACITY_OK (accept the capacity
+ reported by the device);
+ r = IGNORE_RESIDUE (the device reports
+ bogus residue values);
+ s = SINGLE_LUN (the device has only one
+ Logical Unit);
+ w = NO_WP_DETECT (don't test whether the
+ medium is write-protected).
+ Example: quirks=0419:aaf5:rl,0421:0433:rc
+
add_efi_memmap [EFI; x86-32,X86-64] Include EFI memory map in
kernel's map of available physical RAM.
diff --git a/Documentation/usb/power-management.txt b/Documentation/usb/power-management.txt
index e48ea1d51010..ad642615ad4c 100644
--- a/Documentation/usb/power-management.txt
+++ b/Documentation/usb/power-management.txt
@@ -313,11 +313,13 @@ three of the methods listed above. In addition, a driver indicates
that it supports autosuspend by setting the .supports_autosuspend flag
in its usb_driver structure. It is then responsible for informing the
USB core whenever one of its interfaces becomes busy or idle. The
-driver does so by calling these three functions:
+driver does so by calling these five functions:
int usb_autopm_get_interface(struct usb_interface *intf);
void usb_autopm_put_interface(struct usb_interface *intf);
int usb_autopm_set_interface(struct usb_interface *intf);
+ int usb_autopm_get_interface_async(struct usb_interface *intf);
+ void usb_autopm_put_interface_async(struct usb_interface *intf);
The functions work by maintaining a counter in the usb_interface
structure. When intf->pm_usage_count is > 0 then the interface is
@@ -330,10 +332,12 @@ associated with the device itself rather than any of its interfaces.
This field is used only by the USB core.)
The driver owns intf->pm_usage_count; it can modify the value however
-and whenever it likes. A nice aspect of the usb_autopm_* routines is
-that the changes they make are protected by the usb_device structure's
-PM mutex (udev->pm_mutex); however drivers may change pm_usage_count
-without holding the mutex.
+and whenever it likes. A nice aspect of the non-async usb_autopm_*
+routines is that the changes they make are protected by the usb_device
+structure's PM mutex (udev->pm_mutex); however drivers may change
+pm_usage_count without holding the mutex. Drivers using the async
+routines are responsible for their own synchronization and mutual
+exclusion.
usb_autopm_get_interface() increments pm_usage_count and
attempts an autoresume if the new value is > 0 and the
@@ -348,6 +352,14 @@ without holding the mutex.
is suspended, and it attempts an autosuspend if the value is
<= 0 and the device isn't suspended.
+ usb_autopm_get_interface_async() and
+ usb_autopm_put_interface_async() do almost the same things as
+ their non-async counterparts. The differences are: they do
+ not acquire the PM mutex, and they use a workqueue to do their
+ jobs. As a result they can be called in an atomic context,
+ such as an URB's completion handler, but when they return the
+ device will not generally not yet be in the desired state.
+
There also are a couple of utility routines drivers can use:
usb_autopm_enable() sets pm_usage_cnt to 0 and then calls
diff --git a/Documentation/wimax/README.i2400m b/Documentation/wimax/README.i2400m
new file mode 100644
index 000000000000..7dffd8919cb0
--- /dev/null
+++ b/Documentation/wimax/README.i2400m
@@ -0,0 +1,260 @@
+
+ Driver for the Intel Wireless Wimax Connection 2400m
+
+ (C) 2008 Intel Corporation < linux-wimax@intel.com >
+
+ This provides a driver for the Intel Wireless WiMAX Connection 2400m
+ and a basic Linux kernel WiMAX stack.
+
+1. Requirements
+
+ * Linux installation with Linux kernel 2.6.22 or newer (if building
+ from a separate tree)
+ * Intel i2400m Echo Peak or Baxter Peak; this includes the Intel
+ Wireless WiMAX/WiFi Link 5x50 series.
+ * build tools:
+ + Linux kernel development package for the target kernel; to
+ build against your currently running kernel, you need to have
+ the kernel development package corresponding to the running
+ image installed (usually if your kernel is named
+ linux-VERSION, the development package is called
+ linux-dev-VERSION or linux-headers-VERSION).
+ + GNU C Compiler, make
+
+2. Compilation and installation
+
+2.1. Compilation of the drivers included in the kernel
+
+ Configure the kernel; to enable the WiMAX drivers select Drivers >
+ Networking Drivers > WiMAX device support. Enable all of them as
+ modules (easier).
+
+ If USB or SDIO are not enabled in the kernel configuration, the options
+ to build the i2400m USB or SDIO drivers will not show. Enable said
+ subsystems and go back to the WiMAX menu to enable the drivers.
+
+ Compile and install your kernel as usual.
+
+2.2. Compilation of the drivers distributed as an standalone module
+
+ To compile
+
+$ cd source/directory
+$ make
+
+ Once built you can load and unload using the provided load.sh script;
+ load.sh will load the modules, load.sh u will unload them.
+
+ To install in the default kernel directories (and enable auto loading
+ when the device is plugged):
+
+$ make install
+$ depmod -a
+
+ If your kernel development files are located in a non standard
+ directory or if you want to build for a kernel that is not the
+ currently running one, set KDIR to the right location:
+
+$ make KDIR=/path/to/kernel/dev/tree
+
+ For more information, please contact linux-wimax@intel.com.
+
+3. Installing the firmware
+
+ The firmware can be obtained from http://linuxwimax.org or might have
+ been supplied with your hardware.
+
+ It has to be installed in the target system:
+ *
+$ cp FIRMWAREFILE.sbcf /lib/firmware/i2400m-fw-BUSTYPE-1.3.sbcf
+
+ * NOTE: if your firmware came in an .rpm or .deb file, just install
+ it as normal, with the rpm (rpm -i FIRMWARE.rpm) or dpkg
+ (dpkg -i FIRMWARE.deb) commands. No further action is needed.
+ * BUSTYPE will be usb or sdio, depending on the hardware you have.
+ Each hardware type comes with its own firmware and will not work
+ with other types.
+
+4. Design
+
+ This package contains two major parts: a WiMAX kernel stack and a
+ driver for the Intel i2400m.
+
+ The WiMAX stack is designed to provide for common WiMAX control
+ services to current and future WiMAX devices from any vendor; please
+ see README.wimax for details.
+
+ The i2400m kernel driver is broken up in two main parts: the bus
+ generic driver and the bus-specific drivers. The bus generic driver
+ forms the drivercore and contain no knowledge of the actual method we
+ use to connect to the device. The bus specific drivers are just the
+ glue to connect the bus-generic driver and the device. Currently only
+ USB and SDIO are supported. See drivers/net/wimax/i2400m/i2400m.h for
+ more information.
+
+ The bus generic driver is logically broken up in two parts: OS-glue and
+ hardware-glue. The OS-glue interfaces with Linux. The hardware-glue
+ interfaces with the device on using an interface provided by the
+ bus-specific driver. The reason for this breakup is to be able to
+ easily reuse the hardware-glue to write drivers for other OSes; note
+ the hardware glue part is written as a native Linux driver; no
+ abstraction layers are used, so to port to another OS, the Linux kernel
+ API calls should be replaced with the target OS's.
+
+5. Usage
+
+ To load the driver, follow the instructions in the install section;
+ once the driver is loaded, plug in the device (unless it is permanently
+ plugged in). The driver will enumerate the device, upload the firmware
+ and output messages in the kernel log (dmesg, /var/log/messages or
+ /var/log/kern.log) such as:
+
+...
+i2400m_usb 5-4:1.0: firmware interface version 8.0.0
+i2400m_usb 5-4:1.0: WiMAX interface wmx0 (00:1d:e1:01:94:2c) ready
+
+ At this point the device is ready to work.
+
+ Current versions require the Intel WiMAX Network Service in userspace
+ to make things work. See the network service's README for instructions
+ on how to scan, connect and disconnect.
+
+5.1. Module parameters
+
+ Module parameters can be set at kernel or module load time or by
+ echoing values:
+
+$ echo VALUE > /sys/module/MODULENAME/parameters/PARAMETERNAME
+
+ To make changes permanent, for example, for the i2400m module, you can
+ also create a file named /etc/modprobe.d/i2400m containing:
+
+options i2400m idle_mode_disabled=1
+
+ To find which parameters are supported by a module, run:
+
+$ modinfo path/to/module.ko
+
+ During kernel bootup (if the driver is linked in the kernel), specify
+ the following to the kernel command line:
+
+i2400m.PARAMETER=VALUE
+
+5.1.1. i2400m: idle_mode_disabled
+
+ The i2400m module supports a parameter to disable idle mode. This
+ parameter, once set, will take effect only when the device is
+ reinitialized by the driver (eg: following a reset or a reconnect).
+
+5.2. Debug operations: debugfs entries
+
+ The driver will register debugfs entries that allow the user to tweak
+ debug settings. There are three main container directories where
+ entries are placed, which correspond to the three blocks a i2400m WiMAX
+ driver has:
+ * /sys/kernel/debug/wimax:DEVNAME/ for the generic WiMAX stack
+ controls
+ * /sys/kernel/debug/wimax:DEVNAME/i2400m for the i2400m generic
+ driver controls
+ * /sys/kernel/debug/wimax:DEVNAME/i2400m-usb (or -sdio) for the
+ bus-specific i2400m-usb or i2400m-sdio controls).
+
+ Of course, if debugfs is mounted in a directory other than
+ /sys/kernel/debug, those paths will change.
+
+5.2.1. Increasing debug output
+
+ The files named *dl_* indicate knobs for controlling the debug output
+ of different submodules:
+ *
+# find /sys/kernel/debug/wimax\:wmx0 -name \*dl_\*
+/sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_tx
+/sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_rx
+/sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_notif
+/sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_fw
+/sys/kernel/debug/wimax:wmx0/i2400m-usb/dl_usb
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_tx
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_rx
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_rfkill
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_netdev
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_fw
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_debugfs
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_driver
+/sys/kernel/debug/wimax:wmx0/i2400m/dl_control
+/sys/kernel/debug/wimax:wmx0/wimax_dl_stack
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_rfkill
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_reset
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_msg
+/sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
+/sys/kernel/debug/wimax:wmx0/wimax_dl_debugfs
+
+ By reading the file you can obtain the current value of said debug
+ level; by writing to it, you can set it.
+
+ To increase the debug level of, for example, the i2400m's generic TX
+ engine, just write:
+
+$ echo 3 > /sys/kernel/debug/wimax:wmx0/i2400m/dl_tx
+
+ Increasing numbers yield increasing debug information; for details of
+ what is printed and the available levels, check the source. The code
+ uses 0 for disabled and increasing values until 8.
+
+5.2.2. RX and TX statistics
+
+ The i2400m/rx_stats and i2400m/tx_stats provide statistics about the
+ data reception/delivery from the device:
+
+$ cat /sys/kernel/debug/wimax:wmx0/i2400m/rx_stats
+45 1 3 34 3104 48 480
+
+ The numbers reported are
+ * packets/RX-buffer: total, min, max
+ * RX-buffers: total RX buffers received, accumulated RX buffer size
+ in bytes, min size received, max size received
+
+ Thus, to find the average buffer size received, divide accumulated
+ RX-buffer / total RX-buffers.
+
+ To clear the statistics back to 0, write anything to the rx_stats file:
+
+$ echo 1 > /sys/kernel/debug/wimax:wmx0/i2400m_rx_stats
+
+ Likewise for TX.
+
+ Note the packets this debug file refers to are not network packet, but
+ packets in the sense of the device-specific protocol for communication
+ to the host. See drivers/net/wimax/i2400m/tx.c.
+
+5.2.3. Tracing messages received from user space
+
+ To echo messages received from user space into the trace pipe that the
+ i2400m driver creates, set the debug file i2400m/trace_msg_from_user to
+ 1:
+ *
+$ echo 1 > /sys/kernel/debug/wimax:wmx0/i2400m/trace_msg_from_user
+
+5.2.4. Performing a device reset
+
+ By writing a 0, a 1 or a 2 to the file
+ /sys/kernel/debug/wimax:wmx0/reset, the driver performs a warm (without
+ disconnecting from the bus), cold (disconnecting from the bus) or bus
+ (bus specific) reset on the device.
+
+5.2.5. Asking the device to enter power saving mode
+
+ By writing any value to the /sys/kernel/debug/wimax:wmx0 file, the
+ device will attempt to enter power saving mode.
+
+6. Troubleshooting
+
+6.1. Driver complains about 'i2400m-fw-usb-1.2.sbcf: request failed'
+
+ If upon connecting the device, the following is output in the kernel
+ log:
+
+i2400m_usb 5-4:1.0: fw i2400m-fw-usb-1.3.sbcf: request failed: -2
+
+ This means that the driver cannot locate the firmware file named
+ /lib/firmware/i2400m-fw-usb-1.2.sbcf. Check that the file is present in
+ the right location.
diff --git a/Documentation/wimax/README.wimax b/Documentation/wimax/README.wimax
new file mode 100644
index 000000000000..b78c4378084e
--- /dev/null
+++ b/Documentation/wimax/README.wimax
@@ -0,0 +1,81 @@
+
+ Linux kernel WiMAX stack
+
+ (C) 2008 Intel Corporation < linux-wimax@intel.com >
+
+ This provides a basic Linux kernel WiMAX stack to provide a common
+ control API for WiMAX devices, usable from kernel and user space.
+
+1. Design
+
+ The WiMAX stack is designed to provide for common WiMAX control
+ services to current and future WiMAX devices from any vendor.
+
+ Because currently there is only one and we don't know what would be the
+ common services, the APIs it currently provides are very minimal.
+ However, it is done in such a way that it is easily extensible to
+ accommodate future requirements.
+
+ The stack works by embedding a struct wimax_dev in your device's
+ control structures. This provides a set of callbacks that the WiMAX
+ stack will call in order to implement control operations requested by
+ the user. As well, the stack provides API functions that the driver
+ calls to notify about changes of state in the device.
+
+ The stack exports the API calls needed to control the device to user
+ space using generic netlink as a marshalling mechanism. You can access
+ them using your own code or use the wrappers provided for your
+ convenience in libwimax (in the wimax-tools package).
+
+ For detailed information on the stack, please see
+ include/linux/wimax.h.
+
+2. Usage
+
+ For usage in a driver (registration, API, etc) please refer to the
+ instructions in the header file include/linux/wimax.h.
+
+ When a device is registered with the WiMAX stack, a set of debugfs
+ files will appear in /sys/kernel/debug/wimax:wmxX can tweak for
+ control.
+
+2.1. Obtaining debug information: debugfs entries
+
+ The WiMAX stack is compiled, by default, with debug messages that can
+ be used to diagnose issues. By default, said messages are disabled.
+
+ The drivers will register debugfs entries that allow the user to tweak
+ debug settings.
+
+ Each driver, when registering with the stack, will cause a debugfs
+ directory named wimax:DEVICENAME to be created; optionally, it might
+ create more subentries below it.
+
+2.1.1. Increasing debug output
+
+ The files named *dl_* indicate knobs for controlling the debug output
+ of different submodules of the WiMAX stack:
+ *
+# find /sys/kernel/debug/wimax\:wmx0 -name \*dl_\*
+/sys/kernel/debug/wimax:wmx0/wimax_dl_stack
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_rfkill
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_reset
+/sys/kernel/debug/wimax:wmx0/wimax_dl_op_msg
+/sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
+/sys/kernel/debug/wimax:wmx0/wimax_dl_debugfs
+/sys/kernel/debug/wimax:wmx0/.... # other driver specific files
+
+ NOTE: Of course, if debugfs is mounted in a directory other than
+ /sys/kernel/debug, those paths will change.
+
+ By reading the file you can obtain the current value of said debug
+ level; by writing to it, you can set it.
+
+ To increase the debug level of, for example, the id-table submodule,
+ just write:
+
+$ echo 3 > /sys/kernel/debug/wimax:wmx0/wimax_dl_id_table
+
+ Increasing numbers yield increasing debug information; for details of
+ what is printed and the available levels, check the source. The code
+ uses 0 for disabled and increasing values until 8.
diff --git a/MAINTAINERS b/MAINTAINERS
index 06f8ff938c71..ee3871e204e7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2305,6 +2305,14 @@ W: http://lists.sourceforge.net/mailman/listinfo/ipw2100-devel
W: http://ipw2200.sourceforge.net
S: Supported
+INTEL WIRELESS WIMAX CONNECTION 2400
+P: Inaky Perez-Gonzalez
+M: inaky.perez-gonzalez@intel.com
+M: linux-wimax@intel.com
+L: wimax@linuxwimax.org
+S: Supported
+W: http://linuxwimax.org
+
INTEL WIRELESS WIFI LINK (iwlwifi)
P: Zhu Yi
M: yi.zhu@intel.com
@@ -2982,6 +2990,7 @@ MUSB MULTIPOINT HIGH SPEED DUAL-ROLE CONTROLLER
P: Felipe Balbi
M: felipe.balbi@nokia.com
L: linux-usb@vger.kernel.org
+T: git gitorious.org:/musb/mainline.git
S: Maintained
MYRICOM MYRI-10G 10GbE DRIVER (MYRI10GE)
@@ -4733,6 +4742,14 @@ M: zaga@fly.cc.fer.hr
L: linux-scsi@vger.kernel.org
S: Maintained
+WIMAX STACK
+P: Inaky Perez-Gonzalez
+M: inaky.perez-gonzalez@intel.com
+M: linux-wimax@intel.com
+L: wimax@linuxwimax.org
+S: Supported
+W: http://linuxwimax.org
+
WIMEDIA LLC PROTOCOL (WLP) SUBSYSTEM
P: David Vrabel
M: david.vrabel@csr.com
diff --git a/arch/arm/plat-mxc/include/mach/usb.h b/arch/arm/plat-mxc/include/mach/usb.h
new file mode 100644
index 000000000000..2dacb3086f1c
--- /dev/null
+++ b/arch/arm/plat-mxc/include/mach/usb.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __ASM_ARCH_MXC_USB
+#define __ASM_ARCH_MXC_USB
+
+struct imxusb_platform_data {
+ int (*init)(struct device *);
+ int (*exit)(struct device *);
+};
+
+#endif /* __ASM_ARCH_MXC_USB */
diff --git a/arch/arm/plat-omap/usb.c b/arch/arm/plat-omap/usb.c
index 67ca1e216df7..add0485703b5 100644
--- a/arch/arm/plat-omap/usb.c
+++ b/arch/arm/plat-omap/usb.c
@@ -77,38 +77,6 @@
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_USB_MUSB_OTG)
-
-static struct otg_transceiver *xceiv;
-
-/**
- * otg_get_transceiver - find the (single) OTG transceiver driver
- *
- * Returns the transceiver driver, after getting a refcount to it; or
- * null if there is no such transceiver. The caller is responsible for
- * releasing that count.
- */
-struct otg_transceiver *otg_get_transceiver(void)
-{
- if (xceiv)
- get_device(xceiv->dev);
- return xceiv;
-}
-EXPORT_SYMBOL(otg_get_transceiver);
-
-int otg_set_transceiver(struct otg_transceiver *x)
-{
- if (xceiv && x)
- return -EBUSY;
- xceiv = x;
- return 0;
-}
-EXPORT_SYMBOL(otg_set_transceiver);
-
-#endif
-
-/*-------------------------------------------------------------------------*/
-
#if defined(CONFIG_ARCH_OMAP_OTG) || defined(CONFIG_ARCH_OMAP15XX)
static void omap2_usb_devconf_clear(u8 port, u32 mask)
diff --git a/arch/powerpc/boot/dts/sequoia.dts b/arch/powerpc/boot/dts/sequoia.dts
index 3b295e8df53f..43cc68bd3192 100644
--- a/arch/powerpc/boot/dts/sequoia.dts
+++ b/arch/powerpc/boot/dts/sequoia.dts
@@ -134,7 +134,7 @@
};
USB1: usb@e0000400 {
- compatible = "ohci-be";
+ compatible = "ibm,usb-ohci-440epx", "ohci-be";
reg = <0x00000000 0xe0000400 0x00000060>;
interrupt-parent = <&UIC0>;
interrupts = <0x15 0x8>;
diff --git a/drivers/Makefile b/drivers/Makefile
index fceb71a741c3..e121b66ef082 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -57,6 +57,7 @@ obj-$(CONFIG_ATA_OVER_ETH) += block/aoe/
obj-$(CONFIG_PARIDE) += block/paride/
obj-$(CONFIG_TC) += tc/
obj-$(CONFIG_UWB) += uwb/
+obj-$(CONFIG_USB_OTG_UTILS) += usb/otg/
obj-$(CONFIG_USB) += usb/
obj-$(CONFIG_USB_MUSB_HDRC) += usb/musb/
obj-$(CONFIG_PCI) += usb/
diff --git a/drivers/block/ub.c b/drivers/block/ub.c
index 048d71d244d7..12fb816db7b0 100644
--- a/drivers/block/ub.c
+++ b/drivers/block/ub.c
@@ -1579,7 +1579,7 @@ static void ub_reset_task(struct work_struct *work)
struct ub_dev *sc = container_of(work, struct ub_dev, reset_work);
unsigned long flags;
struct ub_lun *lun;
- int lkr, rc;
+ int rc;
if (!sc->reset) {
printk(KERN_WARNING "%s: Running reset unrequested\n",
@@ -1597,10 +1597,11 @@ static void ub_reset_task(struct work_struct *work)
} else if (sc->dev->actconfig->desc.bNumInterfaces != 1) {
;
} else {
- if ((lkr = usb_lock_device_for_reset(sc->dev, sc->intf)) < 0) {
+ rc = usb_lock_device_for_reset(sc->dev, sc->intf);
+ if (rc < 0) {
printk(KERN_NOTICE
"%s: usb_lock_device_for_reset failed (%d)\n",
- sc->name, lkr);
+ sc->name, rc);
} else {
rc = usb_reset_device(sc->dev);
if (rc < 0) {
@@ -1608,9 +1609,7 @@ static void ub_reset_task(struct work_struct *work)
"usb_lock_device_for_reset failed (%d)\n",
sc->name, rc);
}
-
- if (lkr)
- usb_unlock_device(sc->dev);
+ usb_unlock_device(sc->dev);
}
}
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 03cb494af1c5..f0a0f72238ab 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -102,7 +102,7 @@ static void hid_reset(struct work_struct *work)
struct usbhid_device *usbhid =
container_of(work, struct usbhid_device, reset_work);
struct hid_device *hid = usbhid->hid;
- int rc_lock, rc = 0;
+ int rc = 0;
if (test_bit(HID_CLEAR_HALT, &usbhid->iofl)) {
dev_dbg(&usbhid->intf->dev, "clear halt\n");
@@ -113,11 +113,10 @@ static void hid_reset(struct work_struct *work)
else if (test_bit(HID_RESET_PENDING, &usbhid->iofl)) {
dev_dbg(&usbhid->intf->dev, "resetting device\n");
- rc = rc_lock = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
- if (rc_lock >= 0) {
+ rc = usb_lock_device_for_reset(hid_to_usb_dev(hid), usbhid->intf);
+ if (rc == 0) {
rc = usb_reset_device(hid_to_usb_dev(hid));
- if (rc_lock)
- usb_unlock_device(hid_to_usb_dev(hid));
+ usb_unlock_device(hid_to_usb_dev(hid));
}
clear_bit(HID_RESET_PENDING, &usbhid->iofl);
}
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index 864ac561fdbb..59c3d23f5bdc 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -114,18 +114,6 @@ config SENSORS_PCF8591
These devices are hard to detect and rarely found on mainstream
hardware. If unsure, say N.
-config ISP1301_OMAP
- tristate "Philips ISP1301 with OMAP OTG"
- depends on ARCH_OMAP_OTG
- help
- If you say yes here you get support for the Philips ISP1301
- USB-On-The-Go transceiver working with the OMAP OTG controller.
- The ISP1301 is used in products including H2 and H3 development
- boards for Texas Instruments OMAP processors.
-
- This driver can also be built as a module. If so, the module
- will be called isp1301_omap.
-
config SENSORS_MAX6875
tristate "Maxim MAX6875 Power supply supervisor"
depends on EXPERIMENTAL
diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile
index 8b95f41a5001..83accaaf8164 100644
--- a/drivers/i2c/chips/Makefile
+++ b/drivers/i2c/chips/Makefile
@@ -18,7 +18,6 @@ obj-$(CONFIG_SENSORS_PCA9539) += pca9539.o
obj-$(CONFIG_SENSORS_PCF8574) += pcf8574.o
obj-$(CONFIG_PCF8575) += pcf8575.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
-obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o
obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o
obj-$(CONFIG_MCU_MPC8349EMITX) += mcu_mpc8349emitx.o
diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 8fb92ac78c7b..fa304e5f252a 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -3655,7 +3655,7 @@ void pvr2_hdw_device_reset(struct pvr2_hdw *hdw)
int ret;
pvr2_trace(PVR2_TRACE_INIT,"Performing a device reset...");
ret = usb_lock_device_for_reset(hdw->usb_dev,NULL);
- if (ret == 1) {
+ if (ret == 0) {
ret = usb_reset_device(hdw->usb_dev);
usb_unlock_device(hdw->usb_dev);
} else {
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index 9a18270c1081..97ea7c60e002 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -2614,6 +2614,8 @@ source "drivers/net/tokenring/Kconfig"
source "drivers/net/wireless/Kconfig"
+source "drivers/net/wimax/Kconfig"
+
source "drivers/net/usb/Kconfig"
source "drivers/net/pcmcia/Kconfig"
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index e5c34b464211..a3c5c002f224 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -263,3 +263,4 @@ obj-$(CONFIG_NIU) += niu.o
obj-$(CONFIG_VIRTIO_NET) += virtio_net.o
obj-$(CONFIG_SFC) += sfc/
+obj-$(CONFIG_WIMAX) += wimax/
diff --git a/drivers/net/usb/kaweth.c b/drivers/net/usb/kaweth.c
index 2ee034f70d1c..3073ca25a0b0 100644
--- a/drivers/net/usb/kaweth.c
+++ b/drivers/net/usb/kaweth.c
@@ -283,9 +283,9 @@ static int kaweth_control(struct kaweth_device *kaweth,
dr->bRequestType= requesttype;
dr->bRequest = request;
- dr->wValue = cpu_to_le16p(&value);
- dr->wIndex = cpu_to_le16p(&index);
- dr->wLength = cpu_to_le16p(&size);
+ dr->wValue = cpu_to_le16(value);
+ dr->wIndex = cpu_to_le16(index);
+ dr->wLength = cpu_to_le16(size);
return kaweth_internal_control_msg(kaweth->dev,
pipe,
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index 166880c113d6..d9241f1c0803 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -150,8 +150,8 @@ static int get_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
pegasus->dr.bRequestType = PEGASUS_REQT_READ;
pegasus->dr.bRequest = PEGASUS_REQ_GET_REGS;
pegasus->dr.wValue = cpu_to_le16(0);
- pegasus->dr.wIndex = cpu_to_le16p(&indx);
- pegasus->dr.wLength = cpu_to_le16p(&size);
+ pegasus->dr.wIndex = cpu_to_le16(indx);
+ pegasus->dr.wLength = cpu_to_le16(size);
pegasus->ctrl_urb->transfer_buffer_length = size;
usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
@@ -208,8 +208,8 @@ static int set_registers(pegasus_t * pegasus, __u16 indx, __u16 size,
pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
pegasus->dr.bRequest = PEGASUS_REQ_SET_REGS;
pegasus->dr.wValue = cpu_to_le16(0);
- pegasus->dr.wIndex = cpu_to_le16p(&indx);
- pegasus->dr.wLength = cpu_to_le16p(&size);
+ pegasus->dr.wIndex = cpu_to_le16(indx);
+ pegasus->dr.wLength = cpu_to_le16(size);
pegasus->ctrl_urb->transfer_buffer_length = size;
usb_fill_control_urb(pegasus->ctrl_urb, pegasus->usb,
@@ -261,7 +261,7 @@ static int set_register(pegasus_t * pegasus, __u16 indx, __u8 data)
pegasus->dr.bRequestType = PEGASUS_REQT_WRITE;
pegasus->dr.bRequest = PEGASUS_REQ_SET_REG;
pegasus->dr.wValue = cpu_to_le16(data);
- pegasus->dr.wIndex = cpu_to_le16p(&indx);
+ pegasus->dr.wIndex = cpu_to_le16(indx);
pegasus->dr.wLength = cpu_to_le16(1);
pegasus->ctrl_urb->transfer_buffer_length = 1;
@@ -476,7 +476,7 @@ static inline void get_node_id(pegasus_t * pegasus, __u8 * id)
for (i = 0; i < 3; i++) {
read_eprom_word(pegasus, i, &w16);
- ((__le16 *) id)[i] = cpu_to_le16p(&w16);
+ ((__le16 *) id)[i] = cpu_to_le16(w16);
}
}
diff --git a/drivers/net/wimax/Kconfig b/drivers/net/wimax/Kconfig
new file mode 100644
index 000000000000..565018ec1e3b
--- /dev/null
+++ b/drivers/net/wimax/Kconfig
@@ -0,0 +1,17 @@
+#
+# WiMAX LAN device drivers configuration
+#
+
+
+comment "Enable WiMAX (Networking options) to see the WiMAX drivers"
+ depends on WIMAX = n
+
+if WIMAX
+
+menu "WiMAX Wireless Broadband devices"
+
+source "drivers/net/wimax/i2400m/Kconfig"
+
+endmenu
+
+endif
diff --git a/drivers/net/wimax/Makefile b/drivers/net/wimax/Makefile
new file mode 100644
index 000000000000..992bc02bc016
--- /dev/null
+++ b/drivers/net/wimax/Makefile
@@ -0,0 +1,5 @@
+
+obj-$(CONFIG_WIMAX_I2400M) += i2400m/
+
+# (from Sam Ravnborg) force kbuild to create built-in.o
+obj- := dummy.o
diff --git a/drivers/net/wimax/i2400m/Kconfig b/drivers/net/wimax/i2400m/Kconfig
new file mode 100644
index 000000000000..d623b3d99a4b
--- /dev/null
+++ b/drivers/net/wimax/i2400m/Kconfig
@@ -0,0 +1,49 @@
+
+config WIMAX_I2400M
+ tristate
+ depends on WIMAX
+ select FW_LOADER
+
+comment "Enable USB support to see WiMAX USB drivers"
+ depends on USB = n
+
+comment "Enable MMC support to see WiMAX SDIO drivers"
+ depends on MMC = n
+
+config WIMAX_I2400M_USB
+ tristate "Intel Wireless WiMAX Connection 2400 over USB (including 5x50)"
+ depends on WIMAX && USB
+ select WIMAX_I2400M
+ help
+ Select if you have a device based on the Intel WiMAX
+ Connection 2400 over USB (like any of the Intel Wireless
+ WiMAX/WiFi Link 5x50 series).
+
+ If unsure, it is safe to select M (module).
+
+config WIMAX_I2400M_SDIO
+ tristate "Intel Wireless WiMAX Connection 2400 over SDIO"
+ depends on WIMAX && MMC
+ select WIMAX_I2400M
+ help
+ Select if you have a device based on the Intel WiMAX
+ Connection 2400 over SDIO.
+
+ If unsure, it is safe to select M (module).
+
+config WIMAX_I2400M_DEBUG_LEVEL
+ int "WiMAX i2400m debug level"
+ depends on WIMAX_I2400M
+ default 8
+ help
+
+ Select the maximum debug verbosity level to be compiled into
+ the WiMAX i2400m driver code.
+
+ By default, this is disabled at runtime and can be
+ selectively enabled at runtime for different parts of the
+ code using the sysfs debug-levels file.
+
+ If set at zero, this will compile out all the debug code.
+
+ It is recommended that it is left at 8.
diff --git a/drivers/net/wimax/i2400m/Makefile b/drivers/net/wimax/i2400m/Makefile
new file mode 100644
index 000000000000..1696e936cf5a
--- /dev/null
+++ b/drivers/net/wimax/i2400m/Makefile
@@ -0,0 +1,29 @@
+
+obj-$(CONFIG_WIMAX_I2400M) += i2400m.o
+obj-$(CONFIG_WIMAX_I2400M_USB) += i2400m-usb.o
+obj-$(CONFIG_WIMAX_I2400M_SDIO) += i2400m-sdio.o
+
+i2400m-y := \
+ control.o \
+ driver.o \
+ fw.o \
+ op-rfkill.o \
+ netdev.o \
+ tx.o \
+ rx.o
+
+i2400m-$(CONFIG_DEBUG_FS) += debugfs.o
+
+i2400m-usb-y := \
+ usb-fw.o \
+ usb-notif.o \
+ usb-tx.o \
+ usb-rx.o \
+ usb.o
+
+
+i2400m-sdio-y := \
+ sdio.o \
+ sdio-tx.o \
+ sdio-fw.o \
+ sdio-rx.o
diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c
new file mode 100644
index 000000000000..d3d37fed6893
--- /dev/null
+++ b/drivers/net/wimax/i2400m/control.c
@@ -0,0 +1,1291 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Miscellaneous control functions for managing the device
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Initial implementation
+ *
+ * This is a collection of functions used to control the device (plus
+ * a few helpers).
+ *
+ * There are utilities for handling TLV buffers, hooks on the device's
+ * reports to act on device changes of state [i2400m_report_hook()],
+ * on acks to commands [i2400m_msg_ack_hook()], a helper for sending
+ * commands to the device and blocking until a reply arrives
+ * [i2400m_msg_to_dev()], a few high level commands for manipulating
+ * the device state, powersving mode and configuration plus the
+ * routines to setup the device once communication is stablished with
+ * it [i2400m_dev_initialize()].
+ *
+ * ROADMAP
+ *
+ * i2400m_dev_initalize() Called by i2400m_dev_start()
+ * i2400m_set_init_config()
+ * i2400m_firmware_check()
+ * i2400m_cmd_get_state()
+ * i2400m_dev_shutdown() Called by i2400m_dev_stop()
+ * i2400m->bus_reset()
+ *
+ * i2400m_{cmd,get,set}_*()
+ * i2400m_msg_to_dev()
+ * i2400m_msg_check_status()
+ *
+ * i2400m_report_hook() Called on reception of an event
+ * i2400m_report_state_hook()
+ * i2400m_tlv_buffer_walk()
+ * i2400m_tlv_match()
+ * i2400m_report_tlv_system_state()
+ * i2400m_report_tlv_rf_switches_status()
+ * i2400m_report_tlv_media_status()
+ * i2400m_cmd_enter_powersave()
+ *
+ * i2400m_msg_ack_hook() Called on reception of a reply to a
+ * command, get or set
+ */
+
+#include <stdarg.h>
+#include "i2400m.h"
+#include <linux/kernel.h>
+#include <linux/wimax/i2400m.h>
+
+
+#define D_SUBMODULE control
+#include "debug-levels.h"
+
+
+/*
+ * Return if a TLV is of a give type and size
+ *
+ * @tlv_hdr: pointer to the TLV
+ * @tlv_type: type of the TLV we are looking for
+ * @tlv_size: expected size of the TLV we are looking for (if -1,
+ * don't check the size). This includes the header
+ * Returns: 0 if the TLV matches
+ * < 0 if it doesn't match at all
+ * > 0 total TLV + payload size, if the type matches, but not
+ * the size
+ */
+static
+ssize_t i2400m_tlv_match(const struct i2400m_tlv_hdr *tlv,
+ enum i2400m_tlv tlv_type, ssize_t tlv_size)
+{
+ if (le16_to_cpu(tlv->type) != tlv_type) /* Not our type? skip */
+ return -1;
+ if (tlv_size != -1
+ && le16_to_cpu(tlv->length) + sizeof(*tlv) != tlv_size) {
+ size_t size = le16_to_cpu(tlv->length) + sizeof(*tlv);
+ printk(KERN_WARNING "W: tlv type 0x%x mismatched because of "
+ "size (got %zu vs %zu expected)\n",
+ tlv_type, size, tlv_size);
+ return size;
+ }
+ return 0;
+}
+
+
+/*
+ * Given a buffer of TLVs, iterate over them
+ *
+ * @i2400m: device instance
+ * @tlv_buf: pointer to the beginning of the TLV buffer
+ * @buf_size: buffer size in bytes
+ * @tlv_pos: seek position; this is assumed to be a pointer returned
+ * by i2400m_tlv_buffer_walk() [and thus, validated]. The
+ * TLV returned will be the one following this one.
+ *
+ * Usage:
+ *
+ * tlv_itr = NULL;
+ * while (tlv_itr = i2400m_tlv_buffer_walk(i2400m, buf, size, tlv_itr)) {
+ * ...
+ * // Do stuff with tlv_itr, DON'T MODIFY IT
+ * ...
+ * }
+ */
+static
+const struct i2400m_tlv_hdr *i2400m_tlv_buffer_walk(
+ struct i2400m *i2400m,
+ const void *tlv_buf, size_t buf_size,
+ const struct i2400m_tlv_hdr *tlv_pos)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_tlv_hdr *tlv_top = tlv_buf + buf_size;
+ size_t offset, length, avail_size;
+ unsigned type;
+
+ if (tlv_pos == NULL) /* Take the first one? */
+ tlv_pos = tlv_buf;
+ else /* Nope, the next one */
+ tlv_pos = (void *) tlv_pos
+ + le16_to_cpu(tlv_pos->length) + sizeof(*tlv_pos);
+ if (tlv_pos == tlv_top) { /* buffer done */
+ tlv_pos = NULL;
+ goto error_beyond_end;
+ }
+ if (tlv_pos > tlv_top) {
+ tlv_pos = NULL;
+ WARN_ON(1);
+ goto error_beyond_end;
+ }
+ offset = (void *) tlv_pos - (void *) tlv_buf;
+ avail_size = buf_size - offset;
+ if (avail_size < sizeof(*tlv_pos)) {
+ dev_err(dev, "HW BUG? tlv_buf %p [%zu bytes], tlv @%zu: "
+ "short header\n", tlv_buf, buf_size, offset);
+ goto error_short_header;
+ }
+ type = le16_to_cpu(tlv_pos->type);
+ length = le16_to_cpu(tlv_pos->length);
+ if (avail_size < sizeof(*tlv_pos) + length) {
+ dev_err(dev, "HW BUG? tlv_buf %p [%zu bytes], "
+ "tlv type 0x%04x @%zu: "
+ "short data (%zu bytes vs %zu needed)\n",
+ tlv_buf, buf_size, type, offset, avail_size,
+ sizeof(*tlv_pos) + length);
+ goto error_short_header;
+ }
+error_short_header:
+error_beyond_end:
+ return tlv_pos;
+}
+
+
+/*
+ * Find a TLV in a buffer of sequential TLVs
+ *
+ * @i2400m: device descriptor
+ * @tlv_hdr: pointer to the first TLV in the sequence
+ * @size: size of the buffer in bytes; all TLVs are assumed to fit
+ * fully in the buffer (otherwise we'll complain).
+ * @tlv_type: type of the TLV we are looking for
+ * @tlv_size: expected size of the TLV we are looking for (if -1,
+ * don't check the size). This includes the header
+ *
+ * Returns: NULL if the TLV is not found, otherwise a pointer to
+ * it. If the sizes don't match, an error is printed and NULL
+ * returned.
+ */
+static
+const struct i2400m_tlv_hdr *i2400m_tlv_find(
+ struct i2400m *i2400m,
+ const struct i2400m_tlv_hdr *tlv_hdr, size_t size,
+ enum i2400m_tlv tlv_type, ssize_t tlv_size)
+{
+ ssize_t match;
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_tlv_hdr *tlv = NULL;
+ while ((tlv = i2400m_tlv_buffer_walk(i2400m, tlv_hdr, size, tlv))) {
+ match = i2400m_tlv_match(tlv, tlv_type, tlv_size);
+ if (match == 0) /* found it :) */
+ break;
+ if (match > 0)
+ dev_warn(dev, "TLV type 0x%04x found with size "
+ "mismatch (%zu vs %zu needed)\n",
+ tlv_type, match, tlv_size);
+ }
+ return tlv;
+}
+
+
+static const struct
+{
+ char *msg;
+ int errno;
+} ms_to_errno[I2400M_MS_MAX] = {
+ [I2400M_MS_DONE_OK] = { "", 0 },
+ [I2400M_MS_DONE_IN_PROGRESS] = { "", 0 },
+ [I2400M_MS_INVALID_OP] = { "invalid opcode", -ENOSYS },
+ [I2400M_MS_BAD_STATE] = { "invalid state", -EILSEQ },
+ [I2400M_MS_ILLEGAL_VALUE] = { "illegal value", -EINVAL },
+ [I2400M_MS_MISSING_PARAMS] = { "missing parameters", -ENOMSG },
+ [I2400M_MS_VERSION_ERROR] = { "bad version", -EIO },
+ [I2400M_MS_ACCESSIBILITY_ERROR] = { "accesibility error", -EIO },
+ [I2400M_MS_BUSY] = { "busy", -EBUSY },
+ [I2400M_MS_CORRUPTED_TLV] = { "corrupted TLV", -EILSEQ },
+ [I2400M_MS_UNINITIALIZED] = { "not unitialized", -EILSEQ },
+ [I2400M_MS_UNKNOWN_ERROR] = { "unknown error", -EIO },
+ [I2400M_MS_PRODUCTION_ERROR] = { "production error", -EIO },
+ [I2400M_MS_NO_RF] = { "no RF", -EIO },
+ [I2400M_MS_NOT_READY_FOR_POWERSAVE] =
+ { "not ready for powersave", -EACCES },
+ [I2400M_MS_THERMAL_CRITICAL] = { "thermal critical", -EL3HLT },
+};
+
+
+/*
+ * i2400m_msg_check_status - translate a message's status code
+ *
+ * @i2400m: device descriptor
+ * @l3l4_hdr: message header
+ * @strbuf: buffer to place a formatted error message (unless NULL).
+ * @strbuf_size: max amount of available space; larger messages will
+ * be truncated.
+ *
+ * Returns: errno code corresponding to the status code in @l3l4_hdr
+ * and a message in @strbuf describing the error.
+ */
+int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *l3l4_hdr,
+ char *strbuf, size_t strbuf_size)
+{
+ int result;
+ enum i2400m_ms status = le16_to_cpu(l3l4_hdr->status);
+ const char *str;
+
+ if (status == 0)
+ return 0;
+ if (status > ARRAY_SIZE(ms_to_errno)) {
+ str = "unknown status code";
+ result = -EBADR;
+ } else {
+ str = ms_to_errno[status].msg;
+ result = ms_to_errno[status].errno;
+ }
+ if (strbuf)
+ snprintf(strbuf, strbuf_size, "%s (%d)", str, status);
+ return result;
+}
+
+
+/*
+ * Act on a TLV System State reported by the device
+ *
+ * @i2400m: device descriptor
+ * @ss: validated System State TLV
+ */
+static
+void i2400m_report_tlv_system_state(struct i2400m *i2400m,
+ const struct i2400m_tlv_system_state *ss)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ enum i2400m_system_state i2400m_state = le32_to_cpu(ss->state);
+
+ d_fnstart(3, dev, "(i2400m %p ss %p [%u])\n", i2400m, ss, i2400m_state);
+
+ if (unlikely(i2400m->ready == 0)) /* act if up */
+ goto out;
+ if (i2400m->state != i2400m_state) {
+ i2400m->state = i2400m_state;
+ wake_up_all(&i2400m->state_wq);
+ }
+ switch (i2400m_state) {
+ case I2400M_SS_UNINITIALIZED:
+ case I2400M_SS_INIT:
+ case I2400M_SS_CONFIG:
+ case I2400M_SS_PRODUCTION:
+ wimax_state_change(wimax_dev, WIMAX_ST_UNINITIALIZED);
+ break;
+
+ case I2400M_SS_RF_OFF:
+ case I2400M_SS_RF_SHUTDOWN:
+ wimax_state_change(wimax_dev, WIMAX_ST_RADIO_OFF);
+ break;
+
+ case I2400M_SS_READY:
+ case I2400M_SS_STANDBY:
+ case I2400M_SS_SLEEPACTIVE:
+ wimax_state_change(wimax_dev, WIMAX_ST_READY);
+ break;
+
+ case I2400M_SS_CONNECTING:
+ case I2400M_SS_WIMAX_CONNECTED:
+ wimax_state_change(wimax_dev, WIMAX_ST_READY);
+ break;
+
+ case I2400M_SS_SCAN:
+ case I2400M_SS_OUT_OF_ZONE:
+ wimax_state_change(wimax_dev, WIMAX_ST_SCANNING);
+ break;
+
+ case I2400M_SS_IDLE:
+ d_printf(1, dev, "entering BS-negotiated idle mode\n");
+ case I2400M_SS_DISCONNECTING:
+ case I2400M_SS_DATA_PATH_CONNECTED:
+ wimax_state_change(wimax_dev, WIMAX_ST_CONNECTED);
+ break;
+
+ default:
+ /* Huh? just in case, shut it down */
+ dev_err(dev, "HW BUG? unknown state %u: shutting down\n",
+ i2400m_state);
+ i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+ break;
+ };
+out:
+ d_fnend(3, dev, "(i2400m %p ss %p [%u]) = void\n",
+ i2400m, ss, i2400m_state);
+}
+
+
+/*
+ * Parse and act on a TLV Media Status sent by the device
+ *
+ * @i2400m: device descriptor
+ * @ms: validated Media Status TLV
+ *
+ * This will set the carrier up on down based on the device's link
+ * report. This is done asides of what the WiMAX stack does based on
+ * the device's state as sometimes we need to do a link-renew (the BS
+ * wants us to renew a DHCP lease, for example).
+ *
+ * In fact, doc says that everytime we get a link-up, we should do a
+ * DHCP negotiation...
+ */
+static
+void i2400m_report_tlv_media_status(struct i2400m *i2400m,
+ const struct i2400m_tlv_media_status *ms)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ struct net_device *net_dev = wimax_dev->net_dev;
+ enum i2400m_media_status status = le32_to_cpu(ms->media_status);
+
+ d_fnstart(3, dev, "(i2400m %p ms %p [%u])\n", i2400m, ms, status);
+
+ if (unlikely(i2400m->ready == 0)) /* act if up */
+ goto out;
+ switch (status) {
+ case I2400M_MEDIA_STATUS_LINK_UP:
+ netif_carrier_on(net_dev);
+ break;
+ case I2400M_MEDIA_STATUS_LINK_DOWN:
+ netif_carrier_off(net_dev);
+ break;
+ /*
+ * This is the network telling us we need to retrain the DHCP
+ * lease -- so far, we are trusting the WiMAX Network Service
+ * in user space to pick this up and poke the DHCP client.
+ */
+ case I2400M_MEDIA_STATUS_LINK_RENEW:
+ netif_carrier_on(net_dev);
+ break;
+ default:
+ dev_err(dev, "HW BUG? unknown media status %u\n",
+ status);
+ };
+out:
+ d_fnend(3, dev, "(i2400m %p ms %p [%u]) = void\n",
+ i2400m, ms, status);
+}
+
+
+/*
+ * Parse a 'state report' and extract carrier on/off information
+ *
+ * @i2400m: device descriptor
+ * @l3l4_hdr: pointer to message; it has been already validated for
+ * consistent size.
+ * @size: size of the message (header + payload). The header length
+ * declaration is assumed to be congruent with @size (as in
+ * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
+ *
+ * Extract from the report state the system state TLV and infer from
+ * there if we have a carrier or not. Update our local state and tell
+ * netdev.
+ *
+ * When setting the carrier, it's fine to set OFF twice (for example),
+ * as netif_carrier_off() will not generate two OFF events (just on
+ * the transitions).
+ */
+static
+void i2400m_report_state_hook(struct i2400m *i2400m,
+ const struct i2400m_l3l4_hdr *l3l4_hdr,
+ size_t size, const char *tag)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_tlv_hdr *tlv;
+ const struct i2400m_tlv_system_state *ss;
+ const struct i2400m_tlv_rf_switches_status *rfss;
+ const struct i2400m_tlv_media_status *ms;
+ size_t tlv_size = le16_to_cpu(l3l4_hdr->length);
+
+ d_fnstart(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s)\n",
+ i2400m, l3l4_hdr, size, tag);
+ tlv = NULL;
+
+ while ((tlv = i2400m_tlv_buffer_walk(i2400m, &l3l4_hdr->pl,
+ tlv_size, tlv))) {
+ if (0 == i2400m_tlv_match(tlv, I2400M_TLV_SYSTEM_STATE,
+ sizeof(*ss))) {
+ ss = container_of(tlv, typeof(*ss), hdr);
+ d_printf(2, dev, "%s: system state TLV "
+ "found (0x%04x), state 0x%08x\n",
+ tag, I2400M_TLV_SYSTEM_STATE,
+ le32_to_cpu(ss->state));
+ i2400m_report_tlv_system_state(i2400m, ss);
+ }
+ if (0 == i2400m_tlv_match(tlv, I2400M_TLV_RF_STATUS,
+ sizeof(*rfss))) {
+ rfss = container_of(tlv, typeof(*rfss), hdr);
+ d_printf(2, dev, "%s: RF status TLV "
+ "found (0x%04x), sw 0x%02x hw 0x%02x\n",
+ tag, I2400M_TLV_RF_STATUS,
+ le32_to_cpu(rfss->sw_rf_switch),
+ le32_to_cpu(rfss->hw_rf_switch));
+ i2400m_report_tlv_rf_switches_status(i2400m, rfss);
+ }
+ if (0 == i2400m_tlv_match(tlv, I2400M_TLV_MEDIA_STATUS,
+ sizeof(*ms))) {
+ ms = container_of(tlv, typeof(*ms), hdr);
+ d_printf(2, dev, "%s: Media Status TLV: %u\n",
+ tag, le32_to_cpu(ms->media_status));
+ i2400m_report_tlv_media_status(i2400m, ms);
+ }
+ }
+ d_fnend(4, dev, "(i2400m %p, l3l4_hdr %p, size %zu, %s) = void\n",
+ i2400m, l3l4_hdr, size, tag);
+}
+
+
+/*
+ * i2400m_report_hook - (maybe) act on a report
+ *
+ * @i2400m: device descriptor
+ * @l3l4_hdr: pointer to message; it has been already validated for
+ * consistent size.
+ * @size: size of the message (header + payload). The header length
+ * declaration is assumed to be congruent with @size (as in
+ * sizeof(*l3l4_hdr) + l3l4_hdr->length == size)
+ *
+ * Extract information we might need (like carrien on/off) from a
+ * device report.
+ */
+void i2400m_report_hook(struct i2400m *i2400m,
+ const struct i2400m_l3l4_hdr *l3l4_hdr, size_t size)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ unsigned msg_type;
+
+ d_fnstart(3, dev, "(i2400m %p l3l4_hdr %p size %zu)\n",
+ i2400m, l3l4_hdr, size);
+ /* Chew on the message, we might need some information from
+ * here */
+ msg_type = le16_to_cpu(l3l4_hdr->type);
+ switch (msg_type) {
+ case I2400M_MT_REPORT_STATE: /* carrier detection... */
+ i2400m_report_state_hook(i2400m,
+ l3l4_hdr, size, "REPORT STATE");
+ break;
+ /* If the device is ready for power save, then ask it to do
+ * it. */
+ case I2400M_MT_REPORT_POWERSAVE_READY: /* zzzzz */
+ if (l3l4_hdr->status == cpu_to_le16(I2400M_MS_DONE_OK)) {
+ d_printf(1, dev, "ready for powersave, requesting\n");
+ i2400m_cmd_enter_powersave(i2400m);
+ }
+ break;
+ };
+ d_fnend(3, dev, "(i2400m %p l3l4_hdr %p size %zu) = void\n",
+ i2400m, l3l4_hdr, size);
+}
+
+
+/*
+ * i2400m_msg_ack_hook - process cmd/set/get ack for internal status
+ *
+ * @i2400m: device descriptor
+ * @l3l4_hdr: pointer to message; it has been already validated for
+ * consistent size.
+ * @size: size of the message
+ *
+ * Extract information we might need from acks to commands and act on
+ * it. This is akin to i2400m_report_hook(). Note most of this
+ * processing should be done in the function that calls the
+ * command. This is here for some cases where it can't happen...
+ */
+void i2400m_msg_ack_hook(struct i2400m *i2400m,
+ const struct i2400m_l3l4_hdr *l3l4_hdr, size_t size)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ unsigned ack_type, ack_status;
+ char strerr[32];
+
+ /* Chew on the message, we might need some information from
+ * here */
+ ack_type = le16_to_cpu(l3l4_hdr->type);
+ ack_status = le16_to_cpu(l3l4_hdr->status);
+ switch (ack_type) {
+ case I2400M_MT_CMD_ENTER_POWERSAVE:
+ /* This is just left here for the sake of example, as
+ * the processing is done somewhere else. */
+ if (0) {
+ result = i2400m_msg_check_status(
+ l3l4_hdr, strerr, sizeof(strerr));
+ if (result >= 0)
+ d_printf(1, dev, "ready for power save: %zd\n",
+ size);
+ }
+ break;
+ };
+ return;
+}
+
+
+/*
+ * i2400m_msg_size_check() - verify message size and header are congruent
+ *
+ * It is ok if the total message size is larger than the expected
+ * size, as there can be padding.
+ */
+int i2400m_msg_size_check(struct i2400m *i2400m,
+ const struct i2400m_l3l4_hdr *l3l4_hdr,
+ size_t msg_size)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ size_t expected_size;
+ d_fnstart(4, dev, "(i2400m %p l3l4_hdr %p msg_size %zu)\n",
+ i2400m, l3l4_hdr, msg_size);
+ if (msg_size < sizeof(*l3l4_hdr)) {
+ dev_err(dev, "bad size for message header "
+ "(expected at least %zu, got %zu)\n",
+ (size_t) sizeof(*l3l4_hdr), msg_size);
+ result = -EIO;
+ goto error_hdr_size;
+ }
+ expected_size = le16_to_cpu(l3l4_hdr->length) + sizeof(*l3l4_hdr);
+ if (msg_size < expected_size) {
+ dev_err(dev, "bad size for message code 0x%04x (expected %zu, "
+ "got %zu)\n", le16_to_cpu(l3l4_hdr->type),
+ expected_size, msg_size);
+ result = -EIO;
+ } else
+ result = 0;
+error_hdr_size:
+ d_fnend(4, dev,
+ "(i2400m %p l3l4_hdr %p msg_size %zu) = %d\n",
+ i2400m, l3l4_hdr, msg_size, result);
+ return result;
+}
+
+
+
+/*
+ * Cancel a wait for a command ACK
+ *
+ * @i2400m: device descriptor
+ * @code: [negative] errno code to cancel with (don't use
+ * -EINPROGRESS)
+ *
+ * If there is an ack already filled out, free it.
+ */
+void i2400m_msg_to_dev_cancel_wait(struct i2400m *i2400m, int code)
+{
+ struct sk_buff *ack_skb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ ack_skb = i2400m->ack_skb;
+ if (ack_skb && !IS_ERR(ack_skb))
+ kfree(ack_skb);
+ i2400m->ack_skb = ERR_PTR(code);
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+}
+
+
+/**
+ * i2400m_msg_to_dev - Send a control message to the device and get a response
+ *
+ * @i2400m: device descriptor
+ *
+ * @msg_skb: an skb *
+ *
+ * @buf: pointer to the buffer containing the message to be sent; it
+ * has to start with a &struct i2400M_l3l4_hdr and then
+ * followed by the payload. Once this function returns, the
+ * buffer can be reused.
+ *
+ * @buf_len: buffer size
+ *
+ * Returns:
+ *
+ * Pointer to skb containing the ack message. You need to check the
+ * pointer with IS_ERR(), as it might be an error code. Error codes
+ * could happen because:
+ *
+ * - the message wasn't formatted correctly
+ * - couldn't send the message
+ * - failed waiting for a response
+ * - the ack message wasn't formatted correctly
+ *
+ * The returned skb has been allocated with wimax_msg_to_user_alloc(),
+ * it contains the reponse in a netlink attribute and is ready to be
+ * passed up to user space with wimax_msg_to_user_send(). To access
+ * the payload and its length, use wimax_msg_{data,len}() on the skb.
+ *
+ * The skb has to be freed with kfree_skb() once done.
+ *
+ * Description:
+ *
+ * This function delivers a message/command to the device and waits
+ * for an ack to be received. The format is described in
+ * linux/wimax/i2400m.h. In summary, a command/get/set is followed by an
+ * ack.
+ *
+ * This function will not check the ack status, that's left up to the
+ * caller. Once done with the ack skb, it has to be kfree_skb()ed.
+ *
+ * The i2400m handles only one message at the same time, thus we need
+ * the mutex to exclude other players.
+ *
+ * We write the message and then wait for an answer to come back. The
+ * RX path intercepts control messages and handles them in
+ * i2400m_rx_ctl(). Reports (notifications) are (maybe) processed
+ * locally and then forwarded (as needed) to user space on the WiMAX
+ * stack message pipe. Acks are saved and passed back to us through an
+ * skb in i2400m->ack_skb which is ready to be given to generic
+ * netlink if need be.
+ */
+struct sk_buff *i2400m_msg_to_dev(struct i2400m *i2400m,
+ const void *buf, size_t buf_len)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_l3l4_hdr *msg_l3l4_hdr;
+ struct sk_buff *ack_skb;
+ const struct i2400m_l3l4_hdr *ack_l3l4_hdr;
+ size_t ack_len;
+ int ack_timeout;
+ unsigned msg_type;
+ unsigned long flags;
+
+ d_fnstart(3, dev, "(i2400m %p buf %p len %zu)\n",
+ i2400m, buf, buf_len);
+
+ if (i2400m->boot_mode)
+ return ERR_PTR(-ENODEV);
+
+ msg_l3l4_hdr = buf;
+ /* Check msg & payload consistency */
+ result = i2400m_msg_size_check(i2400m, msg_l3l4_hdr, buf_len);
+ if (result < 0)
+ goto error_bad_msg;
+ msg_type = le16_to_cpu(msg_l3l4_hdr->type);
+ d_printf(1, dev, "CMD/GET/SET 0x%04x %zu bytes\n",
+ msg_type, buf_len);
+ d_dump(2, dev, buf, buf_len);
+
+ /* Setup the completion, ack_skb ("we are waiting") and send
+ * the message to the device */
+ mutex_lock(&i2400m->msg_mutex);
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ i2400m->ack_skb = ERR_PTR(-EINPROGRESS);
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ init_completion(&i2400m->msg_completion);
+ result = i2400m_tx(i2400m, buf, buf_len, I2400M_PT_CTRL);
+ if (result < 0) {
+ dev_err(dev, "can't send message 0x%04x: %d\n",
+ le16_to_cpu(msg_l3l4_hdr->type), result);
+ goto error_tx;
+ }
+
+ /* Some commands take longer to execute because of crypto ops,
+ * so we give them some more leeway on timeout */
+ switch (msg_type) {
+ case I2400M_MT_GET_TLS_OPERATION_RESULT:
+ case I2400M_MT_CMD_SEND_EAP_RESPONSE:
+ ack_timeout = 5 * HZ;
+ break;
+ default:
+ ack_timeout = HZ;
+ };
+
+ /* The RX path in rx.c will put any response for this message
+ * in i2400m->ack_skb and wake us up. If we cancel the wait,
+ * we need to change the value of i2400m->ack_skb to something
+ * not -EINPROGRESS so RX knows there is no one waiting. */
+ result = wait_for_completion_interruptible_timeout(
+ &i2400m->msg_completion, ack_timeout);
+ if (result == 0) {
+ dev_err(dev, "timeout waiting for reply to message 0x%04x\n",
+ msg_type);
+ result = -ETIMEDOUT;
+ i2400m_msg_to_dev_cancel_wait(i2400m, result);
+ goto error_wait_for_completion;
+ } else if (result < 0) {
+ dev_err(dev, "error waiting for reply to message 0x%04x: %d\n",
+ msg_type, result);
+ i2400m_msg_to_dev_cancel_wait(i2400m, result);
+ goto error_wait_for_completion;
+ }
+
+ /* Pull out the ack data from i2400m->ack_skb -- see if it is
+ * an error and act accordingly */
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ ack_skb = i2400m->ack_skb;
+ if (IS_ERR(ack_skb))
+ result = PTR_ERR(ack_skb);
+ else
+ result = 0;
+ i2400m->ack_skb = NULL;
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ if (result < 0)
+ goto error_ack_status;
+ ack_l3l4_hdr = wimax_msg_data_len(ack_skb, &ack_len);
+
+ /* Check the ack and deliver it if it is ok */
+ result = i2400m_msg_size_check(i2400m, ack_l3l4_hdr, ack_len);
+ if (result < 0) {
+ dev_err(dev, "HW BUG? reply to message 0x%04x: %d\n",
+ msg_type, result);
+ goto error_bad_ack_len;
+ }
+ if (msg_type != le16_to_cpu(ack_l3l4_hdr->type)) {
+ dev_err(dev, "HW BUG? bad reply 0x%04x to message 0x%04x\n",
+ le16_to_cpu(ack_l3l4_hdr->type), msg_type);
+ result = -EIO;
+ goto error_bad_ack_type;
+ }
+ i2400m_msg_ack_hook(i2400m, ack_l3l4_hdr, ack_len);
+ mutex_unlock(&i2400m->msg_mutex);
+ d_fnend(3, dev, "(i2400m %p buf %p len %zu) = %p\n",
+ i2400m, buf, buf_len, ack_skb);
+ return ack_skb;
+
+error_bad_ack_type:
+error_bad_ack_len:
+ kfree_skb(ack_skb);
+error_ack_status:
+error_wait_for_completion:
+error_tx:
+ mutex_unlock(&i2400m->msg_mutex);
+error_bad_msg:
+ d_fnend(3, dev, "(i2400m %p buf %p len %zu) = %d\n",
+ i2400m, buf, buf_len, result);
+ return ERR_PTR(result);
+}
+
+
+/*
+ * Definitions for the Enter Power Save command
+ *
+ * The Enter Power Save command requests the device to go into power
+ * saving mode. The device will ack or nak the command depending on it
+ * being ready for it. If it acks, we tell the USB subsystem to
+ *
+ * As well, the device might request to go into power saving mode by
+ * sending a report (REPORT_POWERSAVE_READY), in which case, we issue
+ * this command. The hookups in the RX coder allow
+ */
+enum {
+ I2400M_WAKEUP_ENABLED = 0x01,
+ I2400M_WAKEUP_DISABLED = 0x02,
+ I2400M_TLV_TYPE_WAKEUP_MODE = 144,
+};
+
+struct i2400m_cmd_enter_power_save {
+ struct i2400m_l3l4_hdr hdr;
+ struct i2400m_tlv_hdr tlv;
+ __le32 val;
+} __attribute__((packed));
+
+
+/*
+ * Request entering power save
+ *
+ * This command is (mainly) executed when the device indicates that it
+ * is ready to go into powersave mode via a REPORT_POWERSAVE_READY.
+ */
+int i2400m_cmd_enter_powersave(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_cmd_enter_power_save *cmd;
+ char strerr[32];
+
+ result = -ENOMEM;
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->hdr.type = cpu_to_le16(I2400M_MT_CMD_ENTER_POWERSAVE);
+ cmd->hdr.length = cpu_to_le16(sizeof(*cmd) - sizeof(cmd->hdr));
+ cmd->hdr.version = cpu_to_le16(I2400M_L3L4_VERSION);
+ cmd->tlv.type = cpu_to_le16(I2400M_TLV_TYPE_WAKEUP_MODE);
+ cmd->tlv.length = cpu_to_le16(sizeof(cmd->val));
+ cmd->val = cpu_to_le32(I2400M_WAKEUP_ENABLED);
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ result = PTR_ERR(ack_skb);
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'Enter power save' command: %d\n",
+ result);
+ goto error_msg_to_dev;
+ }
+ result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
+ strerr, sizeof(strerr));
+ if (result == -EACCES)
+ d_printf(1, dev, "Cannot enter power save mode\n");
+ else if (result < 0)
+ dev_err(dev, "'Enter power save' (0x%04x) command failed: "
+ "%d - %s\n", I2400M_MT_CMD_ENTER_POWERSAVE,
+ result, strerr);
+ else
+ d_printf(1, dev, "device ready to power save\n");
+ kfree_skb(ack_skb);
+error_msg_to_dev:
+ kfree(cmd);
+error_alloc:
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_cmd_enter_powersave);
+
+
+/*
+ * Definitions for getting device information
+ */
+enum {
+ I2400M_TLV_DETAILED_DEVICE_INFO = 140
+};
+
+/**
+ * i2400m_get_device_info - Query the device for detailed device information
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: an skb whose skb->data points to a 'struct
+ * i2400m_tlv_detailed_device_info'. When done, kfree_skb() it. The
+ * skb is *guaranteed* to contain the whole TLV data structure.
+ *
+ * On error, IS_ERR(skb) is true and ERR_PTR(skb) is the error
+ * code.
+ */
+struct sk_buff *i2400m_get_device_info(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_l3l4_hdr *cmd;
+ const struct i2400m_l3l4_hdr *ack;
+ size_t ack_len;
+ const struct i2400m_tlv_hdr *tlv;
+ const struct i2400m_tlv_detailed_device_info *ddi;
+ char strerr[32];
+
+ ack_skb = ERR_PTR(-ENOMEM);
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->type = cpu_to_le16(I2400M_MT_GET_DEVICE_INFO);
+ cmd->length = 0;
+ cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'get device info' command: %ld\n",
+ PTR_ERR(ack_skb));
+ goto error_msg_to_dev;
+ }
+ ack = wimax_msg_data_len(ack_skb, &ack_len);
+ result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
+ if (result < 0) {
+ dev_err(dev, "'get device info' (0x%04x) command failed: "
+ "%d - %s\n", I2400M_MT_GET_DEVICE_INFO, result,
+ strerr);
+ goto error_cmd_failed;
+ }
+ tlv = i2400m_tlv_find(i2400m, ack->pl, ack_len - sizeof(*ack),
+ I2400M_TLV_DETAILED_DEVICE_INFO, sizeof(*ddi));
+ if (tlv == NULL) {
+ dev_err(dev, "GET DEVICE INFO: "
+ "detailed device info TLV not found (0x%04x)\n",
+ I2400M_TLV_DETAILED_DEVICE_INFO);
+ result = -EIO;
+ goto error_no_tlv;
+ }
+ skb_pull(ack_skb, (void *) tlv - (void *) ack_skb->data);
+error_msg_to_dev:
+ kfree(cmd);
+error_alloc:
+ return ack_skb;
+
+error_no_tlv:
+error_cmd_failed:
+ kfree_skb(ack_skb);
+ kfree(cmd);
+ return ERR_PTR(result);
+}
+
+
+/* Firmware interface versions we support */
+enum {
+ I2400M_HDIv_MAJOR = 9,
+ I2400M_HDIv_MAJOR_2 = 8,
+ I2400M_HDIv_MINOR = 1,
+};
+
+
+/**
+ * i2400m_firmware_check - check firmware versions are compatible with
+ * the driver
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: 0 if ok, < 0 errno code an error and a message in the
+ * kernel log.
+ *
+ * Long function, but quite simple; first chunk launches the command
+ * and double checks the reply for the right TLV. Then we process the
+ * TLV (where the meat is).
+ */
+int i2400m_firmware_check(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_l3l4_hdr *cmd;
+ const struct i2400m_l3l4_hdr *ack;
+ size_t ack_len;
+ const struct i2400m_tlv_hdr *tlv;
+ const struct i2400m_tlv_l4_message_versions *l4mv;
+ char strerr[32];
+ unsigned major, minor, branch;
+
+ result = -ENOMEM;
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->type = cpu_to_le16(I2400M_MT_GET_LM_VERSION);
+ cmd->length = 0;
+ cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ if (IS_ERR(ack_skb)) {
+ result = PTR_ERR(ack_skb);
+ dev_err(dev, "Failed to issue 'get lm version' command: %-d\n",
+ result);
+ goto error_msg_to_dev;
+ }
+ ack = wimax_msg_data_len(ack_skb, &ack_len);
+ result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
+ if (result < 0) {
+ dev_err(dev, "'get lm version' (0x%04x) command failed: "
+ "%d - %s\n", I2400M_MT_GET_LM_VERSION, result,
+ strerr);
+ goto error_cmd_failed;
+ }
+ tlv = i2400m_tlv_find(i2400m, ack->pl, ack_len - sizeof(*ack),
+ I2400M_TLV_L4_MESSAGE_VERSIONS, sizeof(*l4mv));
+ if (tlv == NULL) {
+ dev_err(dev, "get lm version: TLV not found (0x%04x)\n",
+ I2400M_TLV_L4_MESSAGE_VERSIONS);
+ result = -EIO;
+ goto error_no_tlv;
+ }
+ l4mv = container_of(tlv, typeof(*l4mv), hdr);
+ major = le16_to_cpu(l4mv->major);
+ minor = le16_to_cpu(l4mv->minor);
+ branch = le16_to_cpu(l4mv->branch);
+ result = -EINVAL;
+ if (major != I2400M_HDIv_MAJOR
+ && major != I2400M_HDIv_MAJOR_2) {
+ dev_err(dev, "unsupported major fw interface version "
+ "%u.%u.%u\n", major, minor, branch);
+ goto error_bad_major;
+ }
+ if (major == I2400M_HDIv_MAJOR_2)
+ dev_err(dev, "deprecated major fw interface version "
+ "%u.%u.%u\n", major, minor, branch);
+ result = 0;
+ if (minor != I2400M_HDIv_MINOR)
+ dev_warn(dev, "untested minor fw firmware version %u.%u.%u\n",
+ major, minor, branch);
+error_bad_major:
+ dev_info(dev, "firmware interface version %u.%u.%u\n",
+ major, minor, branch);
+error_no_tlv:
+error_cmd_failed:
+ kfree_skb(ack_skb);
+error_msg_to_dev:
+ kfree(cmd);
+error_alloc:
+ return result;
+}
+
+
+/*
+ * Send an DoExitIdle command to the device to ask it to go out of
+ * basestation-idle mode.
+ *
+ * @i2400m: device descriptor
+ *
+ * This starts a renegotiation with the basestation that might involve
+ * another crypto handshake with user space.
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ */
+int i2400m_cmd_exit_idle(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_l3l4_hdr *cmd;
+ char strerr[32];
+
+ result = -ENOMEM;
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->type = cpu_to_le16(I2400M_MT_CMD_EXIT_IDLE);
+ cmd->length = 0;
+ cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ result = PTR_ERR(ack_skb);
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'exit idle' command: %d\n",
+ result);
+ goto error_msg_to_dev;
+ }
+ result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
+ strerr, sizeof(strerr));
+ kfree_skb(ack_skb);
+error_msg_to_dev:
+ kfree(cmd);
+error_alloc:
+ return result;
+
+}
+
+
+/*
+ * Query the device for its state, update the WiMAX stack's idea of it
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * Executes a 'Get State' command and parses the returned
+ * TLVs.
+ *
+ * Because this is almost identical to a 'Report State', we use
+ * i2400m_report_state_hook() to parse the answer. This will set the
+ * carrier state, as well as the RF Kill switches state.
+ */
+int i2400m_cmd_get_state(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_l3l4_hdr *cmd;
+ const struct i2400m_l3l4_hdr *ack;
+ size_t ack_len;
+ char strerr[32];
+
+ result = -ENOMEM;
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->type = cpu_to_le16(I2400M_MT_GET_STATE);
+ cmd->length = 0;
+ cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'get state' command: %ld\n",
+ PTR_ERR(ack_skb));
+ result = PTR_ERR(ack_skb);
+ goto error_msg_to_dev;
+ }
+ ack = wimax_msg_data_len(ack_skb, &ack_len);
+ result = i2400m_msg_check_status(ack, strerr, sizeof(strerr));
+ if (result < 0) {
+ dev_err(dev, "'get state' (0x%04x) command failed: "
+ "%d - %s\n", I2400M_MT_GET_STATE, result, strerr);
+ goto error_cmd_failed;
+ }
+ i2400m_report_state_hook(i2400m, ack, ack_len - sizeof(*ack),
+ "GET STATE");
+ result = 0;
+ kfree_skb(ack_skb);
+error_cmd_failed:
+error_msg_to_dev:
+ kfree(cmd);
+error_alloc:
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_cmd_get_state);
+
+
+/**
+ * Set basic configuration settings
+ *
+ * @i2400m: device descriptor
+ * @args: array of pointers to the TLV headers to send for
+ * configuration (each followed by its payload).
+ * TLV headers and payloads must be properly initialized, with the
+ * right endianess (LE).
+ * @arg_size: number of pointers in the @args array
+ */
+int i2400m_set_init_config(struct i2400m *i2400m,
+ const struct i2400m_tlv_hdr **arg, size_t args)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct i2400m_l3l4_hdr *cmd;
+ char strerr[32];
+ unsigned argc, argsize, tlv_size;
+ const struct i2400m_tlv_hdr *tlv_hdr;
+ void *buf, *itr;
+
+ d_fnstart(3, dev, "(i2400m %p arg %p args %zu)\n", i2400m, arg, args);
+ result = 0;
+ if (args == 0)
+ goto none;
+ /* Compute the size of all the TLVs, so we can alloc a
+ * contiguous command block to copy them. */
+ argsize = 0;
+ for (argc = 0; argc < args; argc++) {
+ tlv_hdr = arg[argc];
+ argsize += sizeof(*tlv_hdr) + le16_to_cpu(tlv_hdr->length);
+ }
+ WARN_ON(argc >= 9); /* As per hw spec */
+
+ /* Alloc the space for the command and TLVs*/
+ result = -ENOMEM;
+ buf = kzalloc(sizeof(*cmd) + argsize, GFP_KERNEL);
+ if (buf == NULL)
+ goto error_alloc;
+ cmd = buf;
+ cmd->type = cpu_to_le16(I2400M_MT_SET_INIT_CONFIG);
+ cmd->length = cpu_to_le16(argsize);
+ cmd->version = cpu_to_le16(I2400M_L3L4_VERSION);
+
+ /* Copy the TLVs */
+ itr = buf + sizeof(*cmd);
+ for (argc = 0; argc < args; argc++) {
+ tlv_hdr = arg[argc];
+ tlv_size = sizeof(*tlv_hdr) + le16_to_cpu(tlv_hdr->length);
+ memcpy(itr, tlv_hdr, tlv_size);
+ itr += tlv_size;
+ }
+
+ /* Send the message! */
+ ack_skb = i2400m_msg_to_dev(i2400m, buf, sizeof(*cmd) + argsize);
+ result = PTR_ERR(ack_skb);
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'init config' command: %d\n",
+ result);
+
+ goto error_msg_to_dev;
+ }
+ result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
+ strerr, sizeof(strerr));
+ if (result < 0)
+ dev_err(dev, "'init config' (0x%04x) command failed: %d - %s\n",
+ I2400M_MT_SET_INIT_CONFIG, result, strerr);
+ kfree_skb(ack_skb);
+error_msg_to_dev:
+ kfree(buf);
+error_alloc:
+none:
+ d_fnend(3, dev, "(i2400m %p arg %p args %zu) = %d\n",
+ i2400m, arg, args, result);
+ return result;
+
+}
+EXPORT_SYMBOL_GPL(i2400m_set_init_config);
+
+
+/**
+ * i2400m_dev_initialize - Initialize the device once communications are ready
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * Configures the device to work the way we like it.
+ *
+ * At the point of this call, the device is registered with the WiMAX
+ * and netdev stacks, firmware is uploaded and we can talk to the
+ * device normally.
+ */
+int i2400m_dev_initialize(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_tlv_config_idle_parameters idle_params;
+ const struct i2400m_tlv_hdr *args[9];
+ unsigned argc = 0;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ /* Useless for now...might change */
+ if (i2400m_idle_mode_disabled) {
+ idle_params.hdr.type =
+ cpu_to_le16(I2400M_TLV_CONFIG_IDLE_PARAMETERS);
+ idle_params.hdr.length = cpu_to_le16(
+ sizeof(idle_params) - sizeof(idle_params.hdr));
+ idle_params.idle_timeout = 0;
+ idle_params.idle_paging_interval = 0;
+ args[argc++] = &idle_params.hdr;
+ }
+ result = i2400m_set_init_config(i2400m, args, argc);
+ if (result < 0)
+ goto error;
+ result = i2400m_firmware_check(i2400m); /* fw versions ok? */
+ if (result < 0)
+ goto error;
+ /*
+ * Update state: Here it just calls a get state; parsing the
+ * result (System State TLV and RF Status TLV [done in the rx
+ * path hooks]) will set the hardware and software RF-Kill
+ * status.
+ */
+ result = i2400m_cmd_get_state(i2400m);
+error:
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+}
+
+
+/**
+ * i2400m_dev_shutdown - Shutdown a running device
+ *
+ * @i2400m: device descriptor
+ *
+ * Gracefully stops the device, moving it to the lowest power
+ * consumption state possible.
+ */
+void i2400m_dev_shutdown(struct i2400m *i2400m)
+{
+ int result = -ENODEV;
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ result = i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+ d_fnend(3, dev, "(i2400m %p) = void [%d]\n", i2400m, result);
+ return;
+}
diff --git a/drivers/net/wimax/i2400m/debug-levels.h b/drivers/net/wimax/i2400m/debug-levels.h
new file mode 100644
index 000000000000..3183baa16a52
--- /dev/null
+++ b/drivers/net/wimax/i2400m/debug-levels.h
@@ -0,0 +1,45 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Debug levels control file for the i2400m module
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#ifndef __debug_levels__h__
+#define __debug_levels__h__
+
+/* Maximum compile and run time debug level for all submodules */
+#define D_MODULENAME i2400m
+#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
+
+#include <linux/wimax/debug.h>
+
+/* List of all the enabled modules */
+enum d_module {
+ D_SUBMODULE_DECLARE(control),
+ D_SUBMODULE_DECLARE(driver),
+ D_SUBMODULE_DECLARE(debugfs),
+ D_SUBMODULE_DECLARE(fw),
+ D_SUBMODULE_DECLARE(netdev),
+ D_SUBMODULE_DECLARE(rfkill),
+ D_SUBMODULE_DECLARE(rx),
+ D_SUBMODULE_DECLARE(tx),
+};
+
+
+#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/net/wimax/i2400m/debugfs.c b/drivers/net/wimax/i2400m/debugfs.c
new file mode 100644
index 000000000000..626632985977
--- /dev/null
+++ b/drivers/net/wimax/i2400m/debugfs.c
@@ -0,0 +1,392 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Debugfs interfaces to manipulate driver and device information
+ *
+ *
+ * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/spinlock.h>
+#include <linux/device.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE debugfs
+#include "debug-levels.h"
+
+static
+int debugfs_netdev_queue_stopped_get(void *data, u64 *val)
+{
+ struct i2400m *i2400m = data;
+ *val = netif_queue_stopped(i2400m->wimax_dev.net_dev);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_netdev_queue_stopped,
+ debugfs_netdev_queue_stopped_get,
+ NULL, "%llu\n");
+
+
+static
+struct dentry *debugfs_create_netdev_queue_stopped(
+ const char *name, struct dentry *parent, struct i2400m *i2400m)
+{
+ return debugfs_create_file(name, 0400, parent, i2400m,
+ &fops_netdev_queue_stopped);
+}
+
+
+/*
+ * inode->i_private has the @data argument to debugfs_create_file()
+ */
+static
+int i2400m_stats_open(struct inode *inode, struct file *filp)
+{
+ filp->private_data = inode->i_private;
+ return 0;
+}
+
+/*
+ * We don't allow partial reads of this file, as then the reader would
+ * get weirdly confused data as it is updated.
+ *
+ * So or you read it all or nothing; if you try to read with an offset
+ * != 0, we consider you are done reading.
+ */
+static
+ssize_t i2400m_rx_stats_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct i2400m *i2400m = filp->private_data;
+ char buf[128];
+ unsigned long flags;
+
+ if (*ppos != 0)
+ return 0;
+ if (count < sizeof(buf))
+ return -ENOSPC;
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
+ i2400m->rx_pl_num, i2400m->rx_pl_min,
+ i2400m->rx_pl_max, i2400m->rx_num,
+ i2400m->rx_size_acc,
+ i2400m->rx_size_min, i2400m->rx_size_max);
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+}
+
+
+/* Any write clears the stats */
+static
+ssize_t i2400m_rx_stats_write(struct file *filp, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct i2400m *i2400m = filp->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ i2400m->rx_pl_num = 0;
+ i2400m->rx_pl_max = 0;
+ i2400m->rx_pl_min = UINT_MAX;
+ i2400m->rx_num = 0;
+ i2400m->rx_size_acc = 0;
+ i2400m->rx_size_min = UINT_MAX;
+ i2400m->rx_size_max = 0;
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ return count;
+}
+
+static
+const struct file_operations i2400m_rx_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = i2400m_stats_open,
+ .read = i2400m_rx_stats_read,
+ .write = i2400m_rx_stats_write,
+};
+
+
+/* See i2400m_rx_stats_read() */
+static
+ssize_t i2400m_tx_stats_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct i2400m *i2400m = filp->private_data;
+ char buf[128];
+ unsigned long flags;
+
+ if (*ppos != 0)
+ return 0;
+ if (count < sizeof(buf))
+ return -ENOSPC;
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ snprintf(buf, sizeof(buf), "%u %u %u %u %u %u %u\n",
+ i2400m->tx_pl_num, i2400m->tx_pl_min,
+ i2400m->tx_pl_max, i2400m->tx_num,
+ i2400m->tx_size_acc,
+ i2400m->tx_size_min, i2400m->tx_size_max);
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ return simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+}
+
+/* Any write clears the stats */
+static
+ssize_t i2400m_tx_stats_write(struct file *filp, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct i2400m *i2400m = filp->private_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ i2400m->tx_pl_num = 0;
+ i2400m->tx_pl_max = 0;
+ i2400m->tx_pl_min = UINT_MAX;
+ i2400m->tx_num = 0;
+ i2400m->tx_size_acc = 0;
+ i2400m->tx_size_min = UINT_MAX;
+ i2400m->tx_size_max = 0;
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ return count;
+}
+
+static
+const struct file_operations i2400m_tx_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = i2400m_stats_open,
+ .read = i2400m_tx_stats_read,
+ .write = i2400m_tx_stats_write,
+};
+
+
+/* Write 1 to ask the device to go into suspend */
+static
+int debugfs_i2400m_suspend_set(void *data, u64 val)
+{
+ int result;
+ struct i2400m *i2400m = data;
+ result = i2400m_cmd_enter_powersave(i2400m);
+ if (result >= 0)
+ result = 0;
+ return result;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_suspend,
+ NULL, debugfs_i2400m_suspend_set,
+ "%llu\n");
+
+static
+struct dentry *debugfs_create_i2400m_suspend(
+ const char *name, struct dentry *parent, struct i2400m *i2400m)
+{
+ return debugfs_create_file(name, 0200, parent, i2400m,
+ &fops_i2400m_suspend);
+}
+
+
+/*
+ * Reset the device
+ *
+ * Write 0 to ask the device to soft reset, 1 to cold reset, 2 to bus
+ * reset (as defined by enum i2400m_reset_type).
+ */
+static
+int debugfs_i2400m_reset_set(void *data, u64 val)
+{
+ int result;
+ struct i2400m *i2400m = data;
+ enum i2400m_reset_type rt = val;
+ switch(rt) {
+ case I2400M_RT_WARM:
+ case I2400M_RT_COLD:
+ case I2400M_RT_BUS:
+ result = i2400m->bus_reset(i2400m, rt);
+ if (result >= 0)
+ result = 0;
+ default:
+ result = -EINVAL;
+ }
+ return result;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_i2400m_reset,
+ NULL, debugfs_i2400m_reset_set,
+ "%llu\n");
+
+static
+struct dentry *debugfs_create_i2400m_reset(
+ const char *name, struct dentry *parent, struct i2400m *i2400m)
+{
+ return debugfs_create_file(name, 0200, parent, i2400m,
+ &fops_i2400m_reset);
+}
+
+/*
+ * Debug levels control; see debug.h
+ */
+struct d_level D_LEVEL[] = {
+ D_SUBMODULE_DEFINE(control),
+ D_SUBMODULE_DEFINE(driver),
+ D_SUBMODULE_DEFINE(debugfs),
+ D_SUBMODULE_DEFINE(fw),
+ D_SUBMODULE_DEFINE(netdev),
+ D_SUBMODULE_DEFINE(rfkill),
+ D_SUBMODULE_DEFINE(rx),
+ D_SUBMODULE_DEFINE(tx),
+};
+size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
+
+#define __debugfs_register(prefix, name, parent) \
+do { \
+ result = d_level_register_debugfs(prefix, name, parent); \
+ if (result < 0) \
+ goto error; \
+} while (0)
+
+
+int i2400m_debugfs_add(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct dentry *dentry = i2400m->wimax_dev.debugfs_dentry;
+ struct dentry *fd;
+
+ dentry = debugfs_create_dir("i2400m", dentry);
+ result = PTR_ERR(dentry);
+ if (IS_ERR(dentry)) {
+ if (result == -ENODEV)
+ result = 0; /* No debugfs support */
+ goto error;
+ }
+ i2400m->debugfs_dentry = dentry;
+ __debugfs_register("dl_", control, dentry);
+ __debugfs_register("dl_", driver, dentry);
+ __debugfs_register("dl_", debugfs, dentry);
+ __debugfs_register("dl_", fw, dentry);
+ __debugfs_register("dl_", netdev, dentry);
+ __debugfs_register("dl_", rfkill, dentry);
+ __debugfs_register("dl_", rx, dentry);
+ __debugfs_register("dl_", tx, dentry);
+
+ fd = debugfs_create_size_t("tx_in", 0400, dentry,
+ &i2400m->tx_in);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "tx_in: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_size_t("tx_out", 0400, dentry,
+ &i2400m->tx_out);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "tx_out: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_u32("state", 0600, dentry,
+ &i2400m->state);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "state: %d\n", result);
+ goto error;
+ }
+
+ /*
+ * Trace received messages from user space
+ *
+ * In order to tap the bidirectional message stream in the
+ * 'msg' pipe, user space can read from the 'msg' pipe;
+ * however, due to limitations in libnl, we can't know what
+ * the different applications are sending down to the kernel.
+ *
+ * So we have this hack where the driver will echo any message
+ * received on the msg pipe from user space [through a call to
+ * wimax_dev->op_msg_from_user() into
+ * i2400m_op_msg_from_user()] into the 'trace' pipe that this
+ * driver creates.
+ *
+ * So then, reading from both the 'trace' and 'msg' pipes in
+ * user space will provide a full dump of the traffic.
+ *
+ * Write 1 to activate, 0 to clear.
+ *
+ * It is not really very atomic, but it is also not too
+ * critical.
+ */
+ fd = debugfs_create_u8("trace_msg_from_user", 0600, dentry,
+ &i2400m->trace_msg_from_user);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "trace_msg_from_user: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_netdev_queue_stopped("netdev_queue_stopped",
+ dentry, i2400m);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "netdev_queue_stopped: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_file("rx_stats", 0600, dentry, i2400m,
+ &i2400m_rx_stats_fops);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "rx_stats: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_file("tx_stats", 0600, dentry, i2400m,
+ &i2400m_tx_stats_fops);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "tx_stats: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_i2400m_suspend("suspend", dentry, i2400m);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry suspend: %d\n",
+ result);
+ goto error;
+ }
+
+ fd = debugfs_create_i2400m_reset("reset", dentry, i2400m);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry reset: %d\n", result);
+ goto error;
+ }
+
+ result = 0;
+error:
+ return result;
+}
+
+void i2400m_debugfs_rm(struct i2400m *i2400m)
+{
+ debugfs_remove_recursive(i2400m->debugfs_dentry);
+}
diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
new file mode 100644
index 000000000000..5f98047e18cf
--- /dev/null
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -0,0 +1,728 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Generic probe/disconnect, reset and message passing
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * See i2400m.h for driver documentation. This contains helpers for
+ * the driver model glue [_setup()/_release()], handling device resets
+ * [_dev_reset_handle()], and the backends for the WiMAX stack ops
+ * reset [_op_reset()] and message from user [_op_msg_from_user()].
+ *
+ * ROADMAP:
+ *
+ * i2400m_op_msg_from_user()
+ * i2400m_msg_to_dev()
+ * wimax_msg_to_user_send()
+ *
+ * i2400m_op_reset()
+ * i240m->bus_reset()
+ *
+ * i2400m_dev_reset_handle()
+ * __i2400m_dev_reset_handle()
+ * __i2400m_dev_stop()
+ * __i2400m_dev_start()
+ *
+ * i2400m_setup()
+ * i2400m_bootrom_init()
+ * register_netdev()
+ * i2400m_dev_start()
+ * __i2400m_dev_start()
+ * i2400m_dev_bootstrap()
+ * i2400m_tx_setup()
+ * i2400m->bus_dev_start()
+ * i2400m_check_mac_addr()
+ * wimax_dev_add()
+ *
+ * i2400m_release()
+ * wimax_dev_rm()
+ * i2400m_dev_stop()
+ * __i2400m_dev_stop()
+ * i2400m_dev_shutdown()
+ * i2400m->bus_dev_stop()
+ * i2400m_tx_release()
+ * unregister_netdev()
+ */
+#include "i2400m.h"
+#include <linux/wimax/i2400m.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+
+#define D_SUBMODULE driver
+#include "debug-levels.h"
+
+
+int i2400m_idle_mode_disabled; /* 0 (idle mode enabled) by default */
+module_param_named(idle_mode_disabled, i2400m_idle_mode_disabled, int, 0644);
+MODULE_PARM_DESC(idle_mode_disabled,
+ "If true, the device will not enable idle mode negotiation "
+ "with the base station (when connected) to save power.");
+
+/**
+ * i2400m_queue_work - schedule work on a i2400m's queue
+ *
+ * @i2400m: device descriptor
+ *
+ * @fn: function to run to execute work. It gets passed a 'struct
+ * work_struct' that is wrapped in a 'struct i2400m_work'. Once
+ * done, you have to (1) i2400m_put(i2400m_work->i2400m) and then
+ * (2) kfree(i2400m_work).
+ *
+ * @gfp_flags: GFP flags for memory allocation.
+ *
+ * @pl: pointer to a payload buffer that you want to pass to the _work
+ * function. Use this to pack (for example) a struct with extra
+ * arguments.
+ *
+ * @pl_size: size of the payload buffer.
+ *
+ * We do this quite often, so this just saves typing; allocate a
+ * wrapper for a i2400m, get a ref to it, pack arguments and launch
+ * the work.
+ *
+ * A usual workflow is:
+ *
+ * struct my_work_args {
+ * void *something;
+ * int whatever;
+ * };
+ * ...
+ *
+ * struct my_work_args my_args = {
+ * .something = FOO,
+ * .whaetever = BLAH
+ * };
+ * i2400m_queue_work(i2400m, 1, my_work_function, GFP_KERNEL,
+ * &args, sizeof(args))
+ *
+ * And now the work function can unpack the arguments and call the
+ * real function (or do the job itself):
+ *
+ * static
+ * void my_work_fn((struct work_struct *ws)
+ * {
+ * struct i2400m_work *iw =
+ * container_of(ws, struct i2400m_work, ws);
+ * struct my_work_args *my_args = (void *) iw->pl;
+ *
+ * my_work(iw->i2400m, my_args->something, my_args->whatevert);
+ * }
+ */
+int i2400m_queue_work(struct i2400m *i2400m,
+ void (*fn)(struct work_struct *), gfp_t gfp_flags,
+ const void *pl, size_t pl_size)
+{
+ int result;
+ struct i2400m_work *iw;
+
+ BUG_ON(i2400m->work_queue == NULL);
+ result = -ENOMEM;
+ iw = kzalloc(sizeof(*iw) + pl_size, gfp_flags);
+ if (iw == NULL)
+ goto error_kzalloc;
+ iw->i2400m = i2400m_get(i2400m);
+ memcpy(iw->pl, pl, pl_size);
+ INIT_WORK(&iw->ws, fn);
+ result = queue_work(i2400m->work_queue, &iw->ws);
+error_kzalloc:
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_queue_work);
+
+
+/*
+ * Schedule i2400m's specific work on the system's queue.
+ *
+ * Used for a few cases where we really need it; otherwise, identical
+ * to i2400m_queue_work().
+ *
+ * Returns < 0 errno code on error, 1 if ok.
+ *
+ * If it returns zero, something really bad happened, as it means the
+ * works struct was already queued, but we have just allocated it, so
+ * it should not happen.
+ */
+int i2400m_schedule_work(struct i2400m *i2400m,
+ void (*fn)(struct work_struct *), gfp_t gfp_flags)
+{
+ int result;
+ struct i2400m_work *iw;
+
+ BUG_ON(i2400m->work_queue == NULL);
+ result = -ENOMEM;
+ iw = kzalloc(sizeof(*iw), gfp_flags);
+ if (iw == NULL)
+ goto error_kzalloc;
+ iw->i2400m = i2400m_get(i2400m);
+ INIT_WORK(&iw->ws, fn);
+ result = schedule_work(&iw->ws);
+ if (result == 0)
+ result = -ENXIO;
+error_kzalloc:
+ return result;
+}
+
+
+/*
+ * WiMAX stack operation: relay a message from user space
+ *
+ * @wimax_dev: device descriptor
+ * @pipe_name: named pipe the message is for
+ * @msg_buf: pointer to the message bytes
+ * @msg_len: length of the buffer
+ * @genl_info: passed by the generic netlink layer
+ *
+ * The WiMAX stack will call this function when a message was received
+ * from user space.
+ *
+ * For the i2400m, this is an L3L4 message, as specified in
+ * include/linux/wimax/i2400m.h, and thus prefixed with a 'struct
+ * i2400m_l3l4_hdr'. Driver (and device) expect the messages to be
+ * coded in Little Endian.
+ *
+ * This function just verifies that the header declaration and the
+ * payload are consistent and then deals with it, either forwarding it
+ * to the device or procesing it locally.
+ *
+ * In the i2400m, messages are basically commands that will carry an
+ * ack, so we use i2400m_msg_to_dev() and then deliver the ack back to
+ * user space. The rx.c code might intercept the response and use it
+ * to update the driver's state, but then it will pass it on so it can
+ * be relayed back to user space.
+ *
+ * Note that asynchronous events from the device are processed and
+ * sent to user space in rx.c.
+ */
+static
+int i2400m_op_msg_from_user(struct wimax_dev *wimax_dev,
+ const char *pipe_name,
+ const void *msg_buf, size_t msg_len,
+ const struct genl_info *genl_info)
+{
+ int result;
+ struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+
+ d_fnstart(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p "
+ "msg_len %zu genl_info %p)\n", wimax_dev, i2400m,
+ msg_buf, msg_len, genl_info);
+ ack_skb = i2400m_msg_to_dev(i2400m, msg_buf, msg_len);
+ result = PTR_ERR(ack_skb);
+ if (IS_ERR(ack_skb))
+ goto error_msg_to_dev;
+ if (unlikely(i2400m->trace_msg_from_user))
+ wimax_msg(&i2400m->wimax_dev, "trace",
+ msg_buf, msg_len, GFP_KERNEL);
+ result = wimax_msg_send(&i2400m->wimax_dev, ack_skb);
+error_msg_to_dev:
+ d_fnend(4, dev, "(wimax_dev %p [i2400m %p] msg_buf %p msg_len %zu "
+ "genl_info %p) = %d\n", wimax_dev, i2400m, msg_buf, msg_len,
+ genl_info, result);
+ return result;
+}
+
+
+/*
+ * Context to wait for a reset to finalize
+ */
+struct i2400m_reset_ctx {
+ struct completion completion;
+ int result;
+};
+
+
+/*
+ * WiMAX stack operation: reset a device
+ *
+ * @wimax_dev: device descriptor
+ *
+ * See the documentation for wimax_reset() and wimax_dev->op_reset for
+ * the requirements of this function. The WiMAX stack guarantees
+ * serialization on calls to this function.
+ *
+ * Do a warm reset on the device; if it fails, resort to a cold reset
+ * and return -ENODEV. On successful warm reset, we need to block
+ * until it is complete.
+ *
+ * The bus-driver implementation of reset takes care of falling back
+ * to cold reset if warm fails.
+ */
+static
+int i2400m_op_reset(struct wimax_dev *wimax_dev)
+{
+ int result;
+ struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_reset_ctx ctx = {
+ .completion = COMPLETION_INITIALIZER_ONSTACK(ctx.completion),
+ .result = 0,
+ };
+
+ d_fnstart(4, dev, "(wimax_dev %p)\n", wimax_dev);
+ mutex_lock(&i2400m->init_mutex);
+ i2400m->reset_ctx = &ctx;
+ mutex_unlock(&i2400m->init_mutex);
+ result = i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+ if (result < 0)
+ goto out;
+ result = wait_for_completion_timeout(&ctx.completion, 4*HZ);
+ if (result == 0)
+ result = -ETIMEDOUT;
+ else if (result > 0)
+ result = ctx.result;
+ /* if result < 0, pass it on */
+ mutex_lock(&i2400m->init_mutex);
+ i2400m->reset_ctx = NULL;
+ mutex_unlock(&i2400m->init_mutex);
+out:
+ d_fnend(4, dev, "(wimax_dev %p) = %d\n", wimax_dev, result);
+ return result;
+}
+
+
+/*
+ * Check the MAC address we got from boot mode is ok
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ */
+static
+int i2400m_check_mac_addr(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *skb;
+ const struct i2400m_tlv_detailed_device_info *ddi;
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+ const unsigned char zeromac[ETH_ALEN] = { 0 };
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ skb = i2400m_get_device_info(i2400m);
+ if (IS_ERR(skb)) {
+ result = PTR_ERR(skb);
+ dev_err(dev, "Cannot verify MAC address, error reading: %d\n",
+ result);
+ goto error;
+ }
+ /* Extract MAC addresss */
+ ddi = (void *) skb->data;
+ BUILD_BUG_ON(ETH_ALEN != sizeof(ddi->mac_address));
+ d_printf(2, dev, "GET DEVICE INFO: mac addr "
+ "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ ddi->mac_address[0], ddi->mac_address[1],
+ ddi->mac_address[2], ddi->mac_address[3],
+ ddi->mac_address[4], ddi->mac_address[5]);
+ if (!memcmp(net_dev->perm_addr, ddi->mac_address,
+ sizeof(ddi->mac_address)))
+ goto ok;
+ dev_warn(dev, "warning: device reports a different MAC address "
+ "to that of boot mode's\n");
+ dev_warn(dev, "device reports %02x:%02x:%02x:%02x:%02x:%02x\n",
+ ddi->mac_address[0], ddi->mac_address[1],
+ ddi->mac_address[2], ddi->mac_address[3],
+ ddi->mac_address[4], ddi->mac_address[5]);
+ dev_warn(dev, "boot mode reported %02x:%02x:%02x:%02x:%02x:%02x\n",
+ net_dev->perm_addr[0], net_dev->perm_addr[1],
+ net_dev->perm_addr[2], net_dev->perm_addr[3],
+ net_dev->perm_addr[4], net_dev->perm_addr[5]);
+ if (!memcmp(zeromac, ddi->mac_address, sizeof(zeromac)))
+ dev_err(dev, "device reports an invalid MAC address, "
+ "not updating\n");
+ else {
+ dev_warn(dev, "updating MAC address\n");
+ net_dev->addr_len = ETH_ALEN;
+ memcpy(net_dev->perm_addr, ddi->mac_address, ETH_ALEN);
+ memcpy(net_dev->dev_addr, ddi->mac_address, ETH_ALEN);
+ }
+ok:
+ result = 0;
+ kfree_skb(skb);
+error:
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+}
+
+
+/**
+ * __i2400m_dev_start - Bring up driver communication with the device
+ *
+ * @i2400m: device descriptor
+ * @flags: boot mode flags
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * Uploads firmware and brings up all the resources needed to be able
+ * to communicate with the device.
+ *
+ * TX needs to be setup before the bus-specific code (otherwise on
+ * shutdown, the bus-tx code could try to access it).
+ */
+static
+int __i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri flags)
+{
+ int result;
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ struct net_device *net_dev = wimax_dev->net_dev;
+ struct device *dev = i2400m_dev(i2400m);
+ int times = 3;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+retry:
+ result = i2400m_dev_bootstrap(i2400m, flags);
+ if (result < 0) {
+ dev_err(dev, "cannot bootstrap device: %d\n", result);
+ goto error_bootstrap;
+ }
+ result = i2400m_tx_setup(i2400m);
+ if (result < 0)
+ goto error_tx_setup;
+ result = i2400m->bus_dev_start(i2400m);
+ if (result < 0)
+ goto error_bus_dev_start;
+ i2400m->work_queue = create_singlethread_workqueue(wimax_dev->name);
+ if (i2400m->work_queue == NULL) {
+ result = -ENOMEM;
+ dev_err(dev, "cannot create workqueue\n");
+ goto error_create_workqueue;
+ }
+ /* At this point is ok to send commands to the device */
+ result = i2400m_check_mac_addr(i2400m);
+ if (result < 0)
+ goto error_check_mac_addr;
+ i2400m->ready = 1;
+ wimax_state_change(wimax_dev, WIMAX_ST_UNINITIALIZED);
+ result = i2400m_dev_initialize(i2400m);
+ if (result < 0)
+ goto error_dev_initialize;
+ /* At this point, reports will come for the device and set it
+ * to the right state if it is different than UNINITIALIZED */
+ d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
+ net_dev, i2400m, result);
+ return result;
+
+error_dev_initialize:
+error_check_mac_addr:
+ destroy_workqueue(i2400m->work_queue);
+error_create_workqueue:
+ i2400m->bus_dev_stop(i2400m);
+error_bus_dev_start:
+ i2400m_tx_release(i2400m);
+error_tx_setup:
+error_bootstrap:
+ if (result == -ERESTARTSYS && times-- > 0) {
+ flags = I2400M_BRI_SOFT;
+ goto retry;
+ }
+ d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
+ net_dev, i2400m, result);
+ return result;
+}
+
+
+static
+int i2400m_dev_start(struct i2400m *i2400m, enum i2400m_bri bm_flags)
+{
+ int result;
+ mutex_lock(&i2400m->init_mutex); /* Well, start the device */
+ result = __i2400m_dev_start(i2400m, bm_flags);
+ if (result >= 0)
+ i2400m->updown = 1;
+ mutex_unlock(&i2400m->init_mutex);
+ return result;
+}
+
+
+/**
+ * i2400m_dev_stop - Tear down driver communication with the device
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * Releases all the resources allocated to communicate with the device.
+ */
+static
+void __i2400m_dev_stop(struct i2400m *i2400m)
+{
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ wimax_state_change(wimax_dev, __WIMAX_ST_QUIESCING);
+ i2400m_dev_shutdown(i2400m);
+ i2400m->ready = 0;
+ destroy_workqueue(i2400m->work_queue);
+ i2400m->bus_dev_stop(i2400m);
+ i2400m_tx_release(i2400m);
+ wimax_state_change(wimax_dev, WIMAX_ST_DOWN);
+ d_fnend(3, dev, "(i2400m %p) = 0\n", i2400m);
+}
+
+
+/*
+ * Watch out -- we only need to stop if there is a need for it. The
+ * device could have reset itself and failed to come up again (see
+ * _i2400m_dev_reset_handle()).
+ */
+static
+void i2400m_dev_stop(struct i2400m *i2400m)
+{
+ mutex_lock(&i2400m->init_mutex);
+ if (i2400m->updown) {
+ __i2400m_dev_stop(i2400m);
+ i2400m->updown = 0;
+ }
+ mutex_unlock(&i2400m->init_mutex);
+}
+
+
+/*
+ * The device has rebooted; fix up the device and the driver
+ *
+ * Tear down the driver communication with the device, reload the
+ * firmware and reinitialize the communication with the device.
+ *
+ * If someone calls a reset when the device's firmware is down, in
+ * theory we won't see it because we are not listening. However, just
+ * in case, leave the code to handle it.
+ *
+ * If there is a reset context, use it; this means someone is waiting
+ * for us to tell him when the reset operation is complete and the
+ * device is ready to rock again.
+ *
+ * NOTE: if we are in the process of bringing up or down the
+ * communication with the device [running i2400m_dev_start() or
+ * _stop()], don't do anything, let it fail and handle it.
+ *
+ * This function is ran always in a thread context
+ */
+static
+void __i2400m_dev_reset_handle(struct work_struct *ws)
+{
+ int result;
+ struct i2400m_work *iw = container_of(ws, struct i2400m_work, ws);
+ struct i2400m *i2400m = iw->i2400m;
+ struct device *dev = i2400m_dev(i2400m);
+ enum wimax_st wimax_state;
+ struct i2400m_reset_ctx *ctx = i2400m->reset_ctx;
+
+ d_fnstart(3, dev, "(ws %p i2400m %p)\n", ws, i2400m);
+ result = 0;
+ if (mutex_trylock(&i2400m->init_mutex) == 0) {
+ /* We are still in i2400m_dev_start() [let it fail] or
+ * i2400m_dev_stop() [we are shutting down anyway, so
+ * ignore it] or we are resetting somewhere else. */
+ dev_err(dev, "device rebooted\n");
+ i2400m_msg_to_dev_cancel_wait(i2400m, -ERESTARTSYS);
+ complete(&i2400m->msg_completion);
+ goto out;
+ }
+ wimax_state = wimax_state_get(&i2400m->wimax_dev);
+ if (wimax_state < WIMAX_ST_UNINITIALIZED) {
+ dev_info(dev, "device rebooted: it is down, ignoring\n");
+ goto out_unlock; /* ifconfig up/down wasn't called */
+ }
+ dev_err(dev, "device rebooted: reinitializing driver\n");
+ __i2400m_dev_stop(i2400m);
+ i2400m->updown = 0;
+ result = __i2400m_dev_start(i2400m,
+ I2400M_BRI_SOFT | I2400M_BRI_MAC_REINIT);
+ if (result < 0) {
+ dev_err(dev, "device reboot: cannot start the device: %d\n",
+ result);
+ result = i2400m->bus_reset(i2400m, I2400M_RT_BUS);
+ if (result >= 0)
+ result = -ENODEV;
+ } else
+ i2400m->updown = 1;
+out_unlock:
+ if (i2400m->reset_ctx) {
+ ctx->result = result;
+ complete(&ctx->completion);
+ }
+ mutex_unlock(&i2400m->init_mutex);
+out:
+ i2400m_put(i2400m);
+ kfree(iw);
+ d_fnend(3, dev, "(ws %p i2400m %p) = void\n", ws, i2400m);
+ return;
+}
+
+
+/**
+ * i2400m_dev_reset_handle - Handle a device's reset in a thread context
+ *
+ * Schedule a device reset handling out on a thread context, so it
+ * is safe to call from atomic context. We can't use the i2400m's
+ * queue as we are going to destroy it and reinitialize it as part of
+ * the driver bringup/bringup process.
+ *
+ * See __i2400m_dev_reset_handle() for details; that takes care of
+ * reinitializing the driver to handle the reset, calling into the
+ * bus-specific functions ops as needed.
+ */
+int i2400m_dev_reset_handle(struct i2400m *i2400m)
+{
+ return i2400m_schedule_work(i2400m, __i2400m_dev_reset_handle,
+ GFP_ATOMIC);
+}
+EXPORT_SYMBOL_GPL(i2400m_dev_reset_handle);
+
+
+/**
+ * i2400m_setup - bus-generic setup function for the i2400m device
+ *
+ * @i2400m: device descriptor (bus-specific parts have been initialized)
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * Initializes the bus-generic parts of the i2400m driver; the
+ * bus-specific parts have been initialized, function pointers filled
+ * out by the bus-specific probe function.
+ *
+ * As well, this registers the WiMAX and net device nodes. Once this
+ * function returns, the device is operative and has to be ready to
+ * receive and send network traffic and WiMAX control operations.
+ */
+int i2400m_setup(struct i2400m *i2400m, enum i2400m_bri bm_flags)
+{
+ int result = -ENODEV;
+ struct device *dev = i2400m_dev(i2400m);
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+
+ snprintf(wimax_dev->name, sizeof(wimax_dev->name),
+ "i2400m-%s:%s", dev->bus->name, dev->bus_id);
+
+ i2400m->bm_cmd_buf = kzalloc(I2400M_BM_CMD_BUF_SIZE, GFP_KERNEL);
+ if (i2400m->bm_cmd_buf == NULL) {
+ dev_err(dev, "cannot allocate USB command buffer\n");
+ goto error_bm_cmd_kzalloc;
+ }
+ i2400m->bm_ack_buf = kzalloc(I2400M_BM_ACK_BUF_SIZE, GFP_KERNEL);
+ if (i2400m->bm_ack_buf == NULL) {
+ dev_err(dev, "cannot allocate USB ack buffer\n");
+ goto error_bm_ack_buf_kzalloc;
+ }
+ result = i2400m_bootrom_init(i2400m, bm_flags);
+ if (result < 0) {
+ dev_err(dev, "read mac addr: bootrom init "
+ "failed: %d\n", result);
+ goto error_bootrom_init;
+ }
+ result = i2400m_read_mac_addr(i2400m);
+ if (result < 0)
+ goto error_read_mac_addr;
+
+ result = register_netdev(net_dev); /* Okey dokey, bring it up */
+ if (result < 0) {
+ dev_err(dev, "cannot register i2400m network device: %d\n",
+ result);
+ goto error_register_netdev;
+ }
+ netif_carrier_off(net_dev);
+
+ result = i2400m_dev_start(i2400m, bm_flags);
+ if (result < 0)
+ goto error_dev_start;
+
+ i2400m->wimax_dev.op_msg_from_user = i2400m_op_msg_from_user;
+ i2400m->wimax_dev.op_rfkill_sw_toggle = i2400m_op_rfkill_sw_toggle;
+ i2400m->wimax_dev.op_reset = i2400m_op_reset;
+ result = wimax_dev_add(&i2400m->wimax_dev, net_dev);
+ if (result < 0)
+ goto error_wimax_dev_add;
+ /* User space needs to do some init stuff */
+ wimax_state_change(wimax_dev, WIMAX_ST_UNINITIALIZED);
+
+ /* Now setup all that requires a registered net and wimax device. */
+ result = i2400m_debugfs_add(i2400m);
+ if (result < 0) {
+ dev_err(dev, "cannot setup i2400m's debugfs: %d\n", result);
+ goto error_debugfs_setup;
+ }
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+
+error_debugfs_setup:
+ wimax_dev_rm(&i2400m->wimax_dev);
+error_wimax_dev_add:
+ i2400m_dev_stop(i2400m);
+error_dev_start:
+ unregister_netdev(net_dev);
+error_register_netdev:
+error_read_mac_addr:
+error_bootrom_init:
+ kfree(i2400m->bm_ack_buf);
+error_bm_ack_buf_kzalloc:
+ kfree(i2400m->bm_cmd_buf);
+error_bm_cmd_kzalloc:
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_setup);
+
+
+/**
+ * i2400m_release - release the bus-generic driver resources
+ *
+ * Sends a disconnect message and undoes any setup done by i2400m_setup()
+ */
+void i2400m_release(struct i2400m *i2400m)
+{
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ netif_stop_queue(i2400m->wimax_dev.net_dev);
+
+ i2400m_debugfs_rm(i2400m);
+ wimax_dev_rm(&i2400m->wimax_dev);
+ i2400m_dev_stop(i2400m);
+ unregister_netdev(i2400m->wimax_dev.net_dev);
+ kfree(i2400m->bm_ack_buf);
+ kfree(i2400m->bm_cmd_buf);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+EXPORT_SYMBOL_GPL(i2400m_release);
+
+
+static
+int __init i2400m_driver_init(void)
+{
+ return 0;
+}
+module_init(i2400m_driver_init);
+
+static
+void __exit i2400m_driver_exit(void)
+{
+ /* for scheds i2400m_dev_reset_handle() */
+ flush_scheduled_work();
+ return;
+}
+module_exit(i2400m_driver_exit);
+
+MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
+MODULE_DESCRIPTION("Intel 2400M WiMAX networking bus-generic driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/net/wimax/i2400m/fw.c b/drivers/net/wimax/i2400m/fw.c
new file mode 100644
index 000000000000..1d8271f34c38
--- /dev/null
+++ b/drivers/net/wimax/i2400m/fw.c
@@ -0,0 +1,1095 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Firmware uploader
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Initial implementation
+ *
+ *
+ * THE PROCEDURE
+ *
+ * (this is decribed for USB, but for SDIO is similar)
+ *
+ * The 2400m works in two modes: boot-mode or normal mode. In boot
+ * mode we can execute only a handful of commands targeted at
+ * uploading the firmware and launching it.
+ *
+ * The 2400m enters boot mode when it is first connected to the
+ * system, when it crashes and when you ask it to reboot. There are
+ * two submodes of the boot mode: signed and non-signed. Signed takes
+ * firmwares signed with a certain private key, non-signed takes any
+ * firmware. Normal hardware takes only signed firmware.
+ *
+ * Upon entrance to boot mode, the device sends a few zero length
+ * packets (ZLPs) on the notification endpoint, then a reboot barker
+ * (4 le32 words with value I2400M_{S,N}BOOT_BARKER). We ack it by
+ * sending the same barker on the bulk out endpoint. The device acks
+ * with a reboot ack barker (4 le32 words with value 0xfeedbabe) and
+ * then the device is fully rebooted. At this point we can upload the
+ * firmware.
+ *
+ * This process is accomplished by the i2400m_bootrom_init()
+ * function. All the device interaction happens through the
+ * i2400m_bm_cmd() [boot mode command]. Special return values will
+ * indicate if the device resets.
+ *
+ * After this, we read the MAC address and then (if needed)
+ * reinitialize the device. We need to read it ahead of time because
+ * in the future, we might not upload the firmware until userspace
+ * 'ifconfig up's the device.
+ *
+ * We can then upload the firmware file. The file is composed of a BCF
+ * header (basic data, keys and signatures) and a list of write
+ * commands and payloads. We first upload the header
+ * [i2400m_dnload_init()] and then pass the commands and payloads
+ * verbatim to the i2400m_bm_cmd() function
+ * [i2400m_dnload_bcf()]. Then we tell the device to jump to the new
+ * firmware [i2400m_dnload_finalize()].
+ *
+ * Once firmware is uploaded, we are good to go :)
+ *
+ * When we don't know in which mode we are, we first try by sending a
+ * warm reset request that will take us to boot-mode. If we time out
+ * waiting for a reboot barker, that means maybe we are already in
+ * boot mode, so we send a reboot barker.
+ *
+ * COMMAND EXECUTION
+ *
+ * This code (and process) is single threaded; for executing commands,
+ * we post a URB to the notification endpoint, post the command, wait
+ * for data on the notification buffer. We don't need to worry about
+ * others as we know we are the only ones in there.
+ *
+ * BACKEND IMPLEMENTATION
+ *
+ * This code is bus-generic; the bus-specific driver provides back end
+ * implementations to send a boot mode command to the device and to
+ * read an acknolwedgement from it (or an asynchronous notification)
+ * from it.
+ *
+ * ROADMAP
+ *
+ * i2400m_dev_bootstrap Called by __i2400m_dev_start()
+ * request_firmware
+ * i2400m_fw_check
+ * i2400m_fw_dnload
+ * release_firmware
+ *
+ * i2400m_fw_dnload
+ * i2400m_bootrom_init
+ * i2400m_bm_cmd
+ * i2400m->bus_reset
+ * i2400m_dnload_init
+ * i2400m_dnload_init_signed
+ * i2400m_dnload_init_nonsigned
+ * i2400m_download_chunk
+ * i2400m_bm_cmd
+ * i2400m_dnload_bcf
+ * i2400m_bm_cmd
+ * i2400m_dnload_finalize
+ * i2400m_bm_cmd
+ *
+ * i2400m_bm_cmd
+ * i2400m->bus_bm_cmd_send()
+ * i2400m->bus_bm_wait_for_ack
+ * __i2400m_bm_ack_verify
+ *
+ * i2400m_bm_cmd_prepare Used by bus-drivers to prep
+ * commands before sending
+ */
+#include <linux/firmware.h>
+#include <linux/sched.h>
+#include <linux/usb.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE fw
+#include "debug-levels.h"
+
+
+static const __le32 i2400m_ACK_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_ACK_BARKER),
+ __constant_cpu_to_le32(I2400M_ACK_BARKER),
+ __constant_cpu_to_le32(I2400M_ACK_BARKER),
+ __constant_cpu_to_le32(I2400M_ACK_BARKER)
+};
+
+
+/**
+ * Prepare a boot-mode command for delivery
+ *
+ * @cmd: pointer to bootrom header to prepare
+ *
+ * Computes checksum if so needed. After calling this function, DO NOT
+ * modify the command or header as the checksum won't work anymore.
+ *
+ * We do it from here because some times we cannot do it in the
+ * original context the command was sent (it is a const), so when we
+ * copy it to our staging buffer, we add the checksum there.
+ */
+void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *cmd)
+{
+ if (i2400m_brh_get_use_checksum(cmd)) {
+ int i;
+ u32 checksum = 0;
+ const u32 *checksum_ptr = (void *) cmd->payload;
+ for (i = 0; i < cmd->data_size / 4; i++)
+ checksum += cpu_to_le32(*checksum_ptr++);
+ checksum += cmd->command + cmd->target_addr + cmd->data_size;
+ cmd->block_checksum = cpu_to_le32(checksum);
+ }
+}
+EXPORT_SYMBOL_GPL(i2400m_bm_cmd_prepare);
+
+
+/*
+ * Verify the ack data received
+ *
+ * Given a reply to a boot mode command, chew it and verify everything
+ * is ok.
+ *
+ * @opcode: opcode which generated this ack. For error messages.
+ * @ack: pointer to ack data we received
+ * @ack_size: size of that data buffer
+ * @flags: I2400M_BM_CMD_* flags we called the command with.
+ *
+ * Way too long function -- maybe it should be further split
+ */
+static
+ssize_t __i2400m_bm_ack_verify(struct i2400m *i2400m, int opcode,
+ struct i2400m_bootrom_header *ack,
+ size_t ack_size, int flags)
+{
+ ssize_t result = -ENOMEM;
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(8, dev, "(i2400m %p opcode %d ack %p size %zu)\n",
+ i2400m, opcode, ack, ack_size);
+ if (ack_size < sizeof(*ack)) {
+ result = -EIO;
+ dev_err(dev, "boot-mode cmd %d: HW BUG? notification didn't "
+ "return enough data (%zu bytes vs %zu expected)\n",
+ opcode, ack_size, sizeof(*ack));
+ goto error_ack_short;
+ }
+ if (ack_size == sizeof(i2400m_NBOOT_BARKER)
+ && memcmp(ack, i2400m_NBOOT_BARKER, sizeof(*ack)) == 0) {
+ result = -ERESTARTSYS;
+ i2400m->sboot = 0;
+ d_printf(6, dev, "boot-mode cmd %d: "
+ "HW non-signed boot barker\n", opcode);
+ goto error_reboot;
+ }
+ if (ack_size == sizeof(i2400m_SBOOT_BARKER)
+ && memcmp(ack, i2400m_SBOOT_BARKER, sizeof(*ack)) == 0) {
+ result = -ERESTARTSYS;
+ i2400m->sboot = 1;
+ d_printf(6, dev, "boot-mode cmd %d: HW signed reboot barker\n",
+ opcode);
+ goto error_reboot;
+ }
+ if (ack_size == sizeof(i2400m_ACK_BARKER)
+ && memcmp(ack, i2400m_ACK_BARKER, sizeof(*ack)) == 0) {
+ result = -EISCONN;
+ d_printf(3, dev, "boot-mode cmd %d: HW reboot ack barker\n",
+ opcode);
+ goto error_reboot_ack;
+ }
+ result = 0;
+ if (flags & I2400M_BM_CMD_RAW)
+ goto out_raw;
+ ack->data_size = le32_to_cpu(ack->data_size);
+ ack->target_addr = le32_to_cpu(ack->target_addr);
+ ack->block_checksum = le32_to_cpu(ack->block_checksum);
+ d_printf(5, dev, "boot-mode cmd %d: notification for opcode %u "
+ "response %u csum %u rr %u da %u\n",
+ opcode, i2400m_brh_get_opcode(ack),
+ i2400m_brh_get_response(ack),
+ i2400m_brh_get_use_checksum(ack),
+ i2400m_brh_get_response_required(ack),
+ i2400m_brh_get_direct_access(ack));
+ result = -EIO;
+ if (i2400m_brh_get_signature(ack) != 0xcbbc) {
+ dev_err(dev, "boot-mode cmd %d: HW BUG? wrong signature "
+ "0x%04x\n", opcode, i2400m_brh_get_signature(ack));
+ goto error_ack_signature;
+ }
+ if (opcode != -1 && opcode != i2400m_brh_get_opcode(ack)) {
+ dev_err(dev, "boot-mode cmd %d: HW BUG? "
+ "received response for opcode %u, expected %u\n",
+ opcode, i2400m_brh_get_opcode(ack), opcode);
+ goto error_ack_opcode;
+ }
+ if (i2400m_brh_get_response(ack) != 0) { /* failed? */
+ dev_err(dev, "boot-mode cmd %d: error; hw response %u\n",
+ opcode, i2400m_brh_get_response(ack));
+ goto error_ack_failed;
+ }
+ if (ack_size < ack->data_size + sizeof(*ack)) {
+ dev_err(dev, "boot-mode cmd %d: SW BUG "
+ "driver provided only %zu bytes for %zu bytes "
+ "of data\n", opcode, ack_size,
+ (size_t) le32_to_cpu(ack->data_size) + sizeof(*ack));
+ goto error_ack_short_buffer;
+ }
+ result = ack_size;
+ /* Don't you love this stack of empty targets? Well, I don't
+ * either, but it helps track exactly who comes in here and
+ * why :) */
+error_ack_short_buffer:
+error_ack_failed:
+error_ack_opcode:
+error_ack_signature:
+out_raw:
+error_reboot_ack:
+error_reboot:
+error_ack_short:
+ d_fnend(8, dev, "(i2400m %p opcode %d ack %p size %zu) = %d\n",
+ i2400m, opcode, ack, ack_size, (int) result);
+ return result;
+}
+
+
+/**
+ * i2400m_bm_cmd - Execute a boot mode command
+ *
+ * @cmd: buffer containing the command data (pointing at the header).
+ * This data can be ANYWHERE (for USB, we will copy it to an
+ * specific buffer). Make sure everything is in proper little
+ * endian.
+ *
+ * A raw buffer can be also sent, just cast it and set flags to
+ * I2400M_BM_CMD_RAW.
+ *
+ * This function will generate a checksum for you if the
+ * checksum bit in the command is set (unless I2400M_BM_CMD_RAW
+ * is set).
+ *
+ * You can use the i2400m->bm_cmd_buf to stage your commands and
+ * send them.
+ *
+ * If NULL, no command is sent (we just wait for an ack).
+ *
+ * @cmd_size: size of the command. Will be auto padded to the
+ * bus-specific drivers padding requirements.
+ *
+ * @ack: buffer where to place the acknowledgement. If it is a regular
+ * command response, all fields will be returned with the right,
+ * native endianess.
+ *
+ * You *cannot* use i2400m->bm_ack_buf for this buffer.
+ *
+ * @ack_size: size of @ack, 16 aligned; you need to provide at least
+ * sizeof(*ack) bytes and then enough to contain the return data
+ * from the command
+ *
+ * @flags: see I2400M_BM_CMD_* above.
+ *
+ * @returns: bytes received by the notification; if < 0, an errno code
+ * denoting an error or:
+ *
+ * -ERESTARTSYS The device has rebooted
+ *
+ * Executes a boot-mode command and waits for a response, doing basic
+ * validation on it; if a zero length response is received, it retries
+ * waiting for a response until a non-zero one is received (timing out
+ * after %I2400M_BOOT_RETRIES retries).
+ */
+static
+ssize_t i2400m_bm_cmd(struct i2400m *i2400m,
+ const struct i2400m_bootrom_header *cmd, size_t cmd_size,
+ struct i2400m_bootrom_header *ack, size_t ack_size,
+ int flags)
+{
+ ssize_t result = -ENOMEM, rx_bytes;
+ struct device *dev = i2400m_dev(i2400m);
+ int opcode = cmd == NULL ? -1 : i2400m_brh_get_opcode(cmd);
+
+ d_fnstart(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu)\n",
+ i2400m, cmd, cmd_size, ack, ack_size);
+ BUG_ON(ack_size < sizeof(*ack));
+ BUG_ON(i2400m->boot_mode == 0);
+
+ if (cmd != NULL) { /* send the command */
+ memcpy(i2400m->bm_cmd_buf, cmd, cmd_size);
+ result = i2400m->bus_bm_cmd_send(i2400m, cmd, cmd_size, flags);
+ if (result < 0)
+ goto error_cmd_send;
+ if ((flags & I2400M_BM_CMD_RAW) == 0)
+ d_printf(5, dev,
+ "boot-mode cmd %d csum %u rr %u da %u: "
+ "addr 0x%04x size %u block csum 0x%04x\n",
+ opcode, i2400m_brh_get_use_checksum(cmd),
+ i2400m_brh_get_response_required(cmd),
+ i2400m_brh_get_direct_access(cmd),
+ cmd->target_addr, cmd->data_size,
+ cmd->block_checksum);
+ }
+ result = i2400m->bus_bm_wait_for_ack(i2400m, ack, ack_size);
+ if (result < 0) {
+ dev_err(dev, "boot-mode cmd %d: error waiting for an ack: %d\n",
+ opcode, (int) result); /* bah, %zd doesn't work */
+ goto error_wait_for_ack;
+ }
+ rx_bytes = result;
+ /* verify the ack and read more if neccessary [result is the
+ * final amount of bytes we get in the ack] */
+ result = __i2400m_bm_ack_verify(i2400m, opcode, ack, ack_size, flags);
+ if (result < 0)
+ goto error_bad_ack;
+ /* Don't you love this stack of empty targets? Well, I don't
+ * either, but it helps track exactly who comes in here and
+ * why :) */
+ result = rx_bytes;
+error_bad_ack:
+error_wait_for_ack:
+error_cmd_send:
+ d_fnend(6, dev, "(i2400m %p cmd %p size %zu ack %p size %zu) = %d\n",
+ i2400m, cmd, cmd_size, ack, ack_size, (int) result);
+ return result;
+}
+
+
+/**
+ * i2400m_download_chunk - write a single chunk of data to the device's memory
+ *
+ * @i2400m: device descriptor
+ * @buf: the buffer to write
+ * @buf_len: length of the buffer to write
+ * @addr: address in the device memory space
+ * @direct: bootrom write mode
+ * @do_csum: should a checksum validation be performed
+ */
+static int i2400m_download_chunk(struct i2400m *i2400m, const void *chunk,
+ size_t __chunk_len, unsigned long addr,
+ unsigned int direct, unsigned int do_csum)
+{
+ int ret;
+ size_t chunk_len = ALIGN(__chunk_len, I2400M_PL_PAD);
+ struct device *dev = i2400m_dev(i2400m);
+ struct {
+ struct i2400m_bootrom_header cmd;
+ u8 cmd_payload[chunk_len];
+ } __attribute__((packed)) *buf;
+ struct i2400m_bootrom_header ack;
+
+ d_fnstart(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx "
+ "direct %u do_csum %u)\n", i2400m, chunk, __chunk_len,
+ addr, direct, do_csum);
+ buf = i2400m->bm_cmd_buf;
+ memcpy(buf->cmd_payload, chunk, __chunk_len);
+ memset(buf->cmd_payload + __chunk_len, 0xad, chunk_len - __chunk_len);
+
+ buf->cmd.command = i2400m_brh_command(I2400M_BRH_WRITE,
+ __chunk_len & 0x3 ? 0 : do_csum,
+ __chunk_len & 0xf ? 0 : direct);
+ buf->cmd.target_addr = cpu_to_le32(addr);
+ buf->cmd.data_size = cpu_to_le32(__chunk_len);
+ ret = i2400m_bm_cmd(i2400m, &buf->cmd, sizeof(buf->cmd) + chunk_len,
+ &ack, sizeof(ack), 0);
+ if (ret >= 0)
+ ret = 0;
+ d_fnend(5, dev, "(i2400m %p chunk %p __chunk_len %zu addr 0x%08lx "
+ "direct %u do_csum %u) = %d\n", i2400m, chunk, __chunk_len,
+ addr, direct, do_csum, ret);
+ return ret;
+}
+
+
+/*
+ * Download a BCF file's sections to the device
+ *
+ * @i2400m: device descriptor
+ * @bcf: pointer to firmware data (followed by the payloads). Assumed
+ * verified and consistent.
+ * @bcf_len: length (in bytes) of the @bcf buffer.
+ *
+ * Returns: < 0 errno code on error or the offset to the jump instruction.
+ *
+ * Given a BCF file, downloads each section (a command and a payload)
+ * to the device's address space. Actually, it just executes each
+ * command i the BCF file.
+ *
+ * The section size has to be aligned to 4 bytes AND the padding has
+ * to be taken from the firmware file, as the signature takes it into
+ * account.
+ */
+static
+ssize_t i2400m_dnload_bcf(struct i2400m *i2400m,
+ const struct i2400m_bcf_hdr *bcf, size_t bcf_len)
+{
+ ssize_t ret;
+ struct device *dev = i2400m_dev(i2400m);
+ size_t offset, /* iterator offset */
+ data_size, /* Size of the data payload */
+ section_size, /* Size of the whole section (cmd + payload) */
+ section = 1;
+ const struct i2400m_bootrom_header *bh;
+ struct i2400m_bootrom_header ack;
+
+ d_fnstart(3, dev, "(i2400m %p bcf %p bcf_len %zu)\n",
+ i2400m, bcf, bcf_len);
+ /* Iterate over the command blocks in the BCF file that start
+ * after the header */
+ offset = le32_to_cpu(bcf->header_len) * sizeof(u32);
+ while (1) { /* start sending the file */
+ bh = (void *) bcf + offset;
+ data_size = le32_to_cpu(bh->data_size);
+ section_size = ALIGN(sizeof(*bh) + data_size, 4);
+ d_printf(7, dev,
+ "downloading section #%zu (@%zu %zu B) to 0x%08x\n",
+ section, offset, sizeof(*bh) + data_size,
+ le32_to_cpu(bh->target_addr));
+ if (i2400m_brh_get_opcode(bh) == I2400M_BRH_SIGNED_JUMP) {
+ /* Secure boot needs to stop here */
+ d_printf(5, dev, "signed jump found @%zu\n", offset);
+ break;
+ }
+ if (offset + section_size == bcf_len)
+ /* Non-secure boot stops here */
+ break;
+ if (offset + section_size > bcf_len) {
+ dev_err(dev, "fw %s: bad section #%zu, "
+ "end (@%zu) beyond EOF (@%zu)\n",
+ i2400m->bus_fw_name, section,
+ offset + section_size, bcf_len);
+ ret = -EINVAL;
+ goto error_section_beyond_eof;
+ }
+ __i2400m_msleep(20);
+ ret = i2400m_bm_cmd(i2400m, bh, section_size,
+ &ack, sizeof(ack), I2400M_BM_CMD_RAW);
+ if (ret < 0) {
+ dev_err(dev, "fw %s: section #%zu (@%zu %zu B) "
+ "failed %d\n", i2400m->bus_fw_name, section,
+ offset, sizeof(*bh) + data_size, (int) ret);
+ goto error_send;
+ }
+ offset += section_size;
+ section++;
+ }
+ ret = offset;
+error_section_beyond_eof:
+error_send:
+ d_fnend(3, dev, "(i2400m %p bcf %p bcf_len %zu) = %d\n",
+ i2400m, bcf, bcf_len, (int) ret);
+ return ret;
+}
+
+
+/*
+ * Do the final steps of uploading firmware
+ *
+ * Depending on the boot mode (signed vs non-signed), different
+ * actions need to be taken.
+ */
+static
+int i2400m_dnload_finalize(struct i2400m *i2400m,
+ const struct i2400m_bcf_hdr *bcf, size_t offset)
+{
+ int ret = 0;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_bootrom_header *cmd, ack;
+ struct {
+ struct i2400m_bootrom_header cmd;
+ u8 cmd_pl[0];
+ } __attribute__((packed)) *cmd_buf;
+ size_t signature_block_offset, signature_block_size;
+
+ d_fnstart(3, dev, "offset %zu\n", offset);
+ cmd = (void *) bcf + offset;
+ if (i2400m->sboot == 0) {
+ struct i2400m_bootrom_header jump_ack;
+ d_printf(3, dev, "unsecure boot, jumping to 0x%08x\n",
+ le32_to_cpu(cmd->target_addr));
+ i2400m_brh_set_opcode(cmd, I2400M_BRH_JUMP);
+ cmd->data_size = 0;
+ ret = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
+ &jump_ack, sizeof(jump_ack), 0);
+ } else {
+ d_printf(3, dev, "secure boot, jumping to 0x%08x\n",
+ le32_to_cpu(cmd->target_addr));
+ cmd_buf = i2400m->bm_cmd_buf;
+ memcpy(&cmd_buf->cmd, cmd, sizeof(*cmd));
+ signature_block_offset =
+ sizeof(*bcf)
+ + le32_to_cpu(bcf->key_size) * sizeof(u32)
+ + le32_to_cpu(bcf->exponent_size) * sizeof(u32);
+ signature_block_size =
+ le32_to_cpu(bcf->modulus_size) * sizeof(u32);
+ memcpy(cmd_buf->cmd_pl, (void *) bcf + signature_block_offset,
+ signature_block_size);
+ ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd,
+ sizeof(cmd_buf->cmd) + signature_block_size,
+ &ack, sizeof(ack), I2400M_BM_CMD_RAW);
+ }
+ d_fnend(3, dev, "returning %d\n", ret);
+ return ret;
+}
+
+
+/**
+ * i2400m_bootrom_init - Reboots a powered device into boot mode
+ *
+ * @i2400m: device descriptor
+ * @flags:
+ * I2400M_BRI_SOFT: a reboot notification has been seen
+ * already, so don't wait for it.
+ *
+ * I2400M_BRI_NO_REBOOT: Don't send a reboot command, but wait
+ * for a reboot barker notification. This is a one shot; if
+ * the state machine needs to send a reboot command it will.
+ *
+ * Returns:
+ *
+ * < 0 errno code on error, 0 if ok.
+ *
+ * i2400m->sboot set to 0 for unsecure boot process, 1 for secure
+ * boot process.
+ *
+ * Description:
+ *
+ * Tries hard enough to put the device in boot-mode. There are two
+ * main phases to this:
+ *
+ * a. (1) send a reboot command and (2) get a reboot barker
+ * b. (1) ack the reboot sending a reboot barker and (2) getting an
+ * ack barker in return
+ *
+ * We want to skip (a) in some cases [soft]. The state machine is
+ * horrible, but it is basically: on each phase, send what has to be
+ * sent (if any), wait for the answer and act on the answer. We might
+ * have to backtrack and retry, so we keep a max tries counter for
+ * that.
+ *
+ * If we get a timeout after sending a warm reset, we do it again.
+ */
+int i2400m_bootrom_init(struct i2400m *i2400m, enum i2400m_bri flags)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_bootrom_header *cmd;
+ struct i2400m_bootrom_header ack;
+ int count = I2400M_BOOT_RETRIES;
+ int ack_timeout_cnt = 1;
+
+ BUILD_BUG_ON(sizeof(*cmd) != sizeof(i2400m_NBOOT_BARKER));
+ BUILD_BUG_ON(sizeof(ack) != sizeof(i2400m_ACK_BARKER));
+
+ d_fnstart(4, dev, "(i2400m %p flags 0x%08x)\n", i2400m, flags);
+ result = -ENOMEM;
+ cmd = i2400m->bm_cmd_buf;
+ if (flags & I2400M_BRI_SOFT)
+ goto do_reboot_ack;
+do_reboot:
+ if (--count < 0)
+ goto error_timeout;
+ d_printf(4, dev, "device reboot: reboot command [%d # left]\n",
+ count);
+ if ((flags & I2400M_BRI_NO_REBOOT) == 0)
+ i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+ result = i2400m_bm_cmd(i2400m, NULL, 0, &ack, sizeof(ack),
+ I2400M_BM_CMD_RAW);
+ flags &= ~I2400M_BRI_NO_REBOOT;
+ switch (result) {
+ case -ERESTARTSYS:
+ d_printf(4, dev, "device reboot: got reboot barker\n");
+ break;
+ case -EISCONN: /* we don't know how it got here...but we follow it */
+ d_printf(4, dev, "device reboot: got ack barker - whatever\n");
+ goto do_reboot;
+ case -ETIMEDOUT: /* device has timed out, we might be in boot
+ * mode already and expecting an ack, let's try
+ * that */
+ dev_info(dev, "warm reset timed out, trying an ack\n");
+ goto do_reboot_ack;
+ case -EPROTO:
+ case -ESHUTDOWN: /* dev is gone */
+ case -EINTR: /* user cancelled */
+ goto error_dev_gone;
+ default:
+ dev_err(dev, "device reboot: error %d while waiting "
+ "for reboot barker - rebooting\n", result);
+ goto do_reboot;
+ }
+ /* At this point we ack back with 4 REBOOT barkers and expect
+ * 4 ACK barkers. This is ugly, as we send a raw command --
+ * hence the cast. _bm_cmd() will catch the reboot ack
+ * notification and report it as -EISCONN. */
+do_reboot_ack:
+ d_printf(4, dev, "device reboot ack: sending ack [%d # left]\n", count);
+ if (i2400m->sboot == 0)
+ memcpy(cmd, i2400m_NBOOT_BARKER,
+ sizeof(i2400m_NBOOT_BARKER));
+ else
+ memcpy(cmd, i2400m_SBOOT_BARKER,
+ sizeof(i2400m_SBOOT_BARKER));
+ result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
+ &ack, sizeof(ack), I2400M_BM_CMD_RAW);
+ switch (result) {
+ case -ERESTARTSYS:
+ d_printf(4, dev, "reboot ack: got reboot barker - retrying\n");
+ if (--count < 0)
+ goto error_timeout;
+ goto do_reboot_ack;
+ case -EISCONN:
+ d_printf(4, dev, "reboot ack: got ack barker - good\n");
+ break;
+ case -ETIMEDOUT: /* no response, maybe it is the other type? */
+ if (ack_timeout_cnt-- >= 0) {
+ d_printf(4, dev, "reboot ack timedout: "
+ "trying the other type?\n");
+ i2400m->sboot = !i2400m->sboot;
+ goto do_reboot_ack;
+ } else {
+ dev_err(dev, "reboot ack timedout too long: "
+ "trying reboot\n");
+ goto do_reboot;
+ }
+ break;
+ case -EPROTO:
+ case -ESHUTDOWN: /* dev is gone */
+ goto error_dev_gone;
+ default:
+ dev_err(dev, "device reboot ack: error %d while waiting for "
+ "reboot ack barker - rebooting\n", result);
+ goto do_reboot;
+ }
+ d_printf(2, dev, "device reboot ack: got ack barker - boot done\n");
+ result = 0;
+exit_timeout:
+error_dev_gone:
+ d_fnend(4, dev, "(i2400m %p flags 0x%08x) = %d\n",
+ i2400m, flags, result);
+ return result;
+
+error_timeout:
+ dev_err(dev, "Timed out waiting for reboot ack, resetting\n");
+ i2400m->bus_reset(i2400m, I2400M_RT_BUS);
+ result = -ETIMEDOUT;
+ goto exit_timeout;
+}
+
+
+/*
+ * Read the MAC addr
+ *
+ * The position this function reads is fixed in device memory and
+ * always available, even without firmware.
+ *
+ * Note we specify we want to read only six bytes, but provide space
+ * for 16, as we always get it rounded up.
+ */
+int i2400m_read_mac_addr(struct i2400m *i2400m)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+ struct i2400m_bootrom_header *cmd;
+ struct {
+ struct i2400m_bootrom_header ack;
+ u8 ack_pl[16];
+ } __attribute__((packed)) ack_buf;
+
+ d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
+ cmd = i2400m->bm_cmd_buf;
+ cmd->command = i2400m_brh_command(I2400M_BRH_READ, 0, 1);
+ cmd->target_addr = cpu_to_le32(0x00203fe8);
+ cmd->data_size = cpu_to_le32(6);
+ result = i2400m_bm_cmd(i2400m, cmd, sizeof(*cmd),
+ &ack_buf.ack, sizeof(ack_buf), 0);
+ if (result < 0) {
+ dev_err(dev, "BM: read mac addr failed: %d\n", result);
+ goto error_read_mac;
+ }
+ d_printf(2, dev,
+ "mac addr is %02x:%02x:%02x:%02x:%02x:%02x\n",
+ ack_buf.ack_pl[0], ack_buf.ack_pl[1],
+ ack_buf.ack_pl[2], ack_buf.ack_pl[3],
+ ack_buf.ack_pl[4], ack_buf.ack_pl[5]);
+ if (i2400m->bus_bm_mac_addr_impaired == 1) {
+ ack_buf.ack_pl[0] = 0x00;
+ ack_buf.ack_pl[1] = 0x16;
+ ack_buf.ack_pl[2] = 0xd3;
+ get_random_bytes(&ack_buf.ack_pl[3], 3);
+ dev_err(dev, "BM is MAC addr impaired, faking MAC addr to "
+ "mac addr is %02x:%02x:%02x:%02x:%02x:%02x\n",
+ ack_buf.ack_pl[0], ack_buf.ack_pl[1],
+ ack_buf.ack_pl[2], ack_buf.ack_pl[3],
+ ack_buf.ack_pl[4], ack_buf.ack_pl[5]);
+ result = 0;
+ }
+ net_dev->addr_len = ETH_ALEN;
+ memcpy(net_dev->perm_addr, ack_buf.ack_pl, ETH_ALEN);
+ memcpy(net_dev->dev_addr, ack_buf.ack_pl, ETH_ALEN);
+error_read_mac:
+ d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+}
+
+
+/*
+ * Initialize a non signed boot
+ *
+ * This implies sending some magic values to the device's memory. Note
+ * we convert the values to little endian in the same array
+ * declaration.
+ */
+static
+int i2400m_dnload_init_nonsigned(struct i2400m *i2400m)
+{
+#define POKE(a, d) { \
+ .address = __constant_cpu_to_le32(a), \
+ .data = __constant_cpu_to_le32(d) \
+}
+ static const struct {
+ __le32 address;
+ __le32 data;
+ } i2400m_pokes[] = {
+ POKE(0x081A58, 0xA7810230),
+ POKE(0x080040, 0x00000000),
+ POKE(0x080048, 0x00000082),
+ POKE(0x08004C, 0x0000081F),
+ POKE(0x080054, 0x00000085),
+ POKE(0x080058, 0x00000180),
+ POKE(0x08005C, 0x00000018),
+ POKE(0x080060, 0x00000010),
+ POKE(0x080574, 0x00000001),
+ POKE(0x080550, 0x00000005),
+ POKE(0xAE0000, 0x00000000),
+ };
+#undef POKE
+ unsigned i;
+ int ret;
+ struct device *dev = i2400m_dev(i2400m);
+
+ dev_warn(dev, "WARNING!!! non-signed boot UNTESTED PATH!\n");
+
+ d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
+ for (i = 0; i < ARRAY_SIZE(i2400m_pokes); i++) {
+ ret = i2400m_download_chunk(i2400m, &i2400m_pokes[i].data,
+ sizeof(i2400m_pokes[i].data),
+ i2400m_pokes[i].address, 1, 1);
+ if (ret < 0)
+ break;
+ }
+ d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret);
+ return ret;
+}
+
+
+/*
+ * Initialize the signed boot process
+ *
+ * @i2400m: device descriptor
+ *
+ * @bcf_hdr: pointer to the firmware header; assumes it is fully in
+ * memory (it has gone through basic validation).
+ *
+ * Returns: 0 if ok, < 0 errno code on error, -ERESTARTSYS if the hw
+ * rebooted.
+ *
+ * This writes the firmware BCF header to the device using the
+ * HASH_PAYLOAD_ONLY command.
+ */
+static
+int i2400m_dnload_init_signed(struct i2400m *i2400m,
+ const struct i2400m_bcf_hdr *bcf_hdr)
+{
+ int ret;
+ struct device *dev = i2400m_dev(i2400m);
+ struct {
+ struct i2400m_bootrom_header cmd;
+ struct i2400m_bcf_hdr cmd_pl;
+ } __attribute__((packed)) *cmd_buf;
+ struct i2400m_bootrom_header ack;
+
+ d_fnstart(5, dev, "(i2400m %p bcf_hdr %p)\n", i2400m, bcf_hdr);
+ cmd_buf = i2400m->bm_cmd_buf;
+ cmd_buf->cmd.command =
+ i2400m_brh_command(I2400M_BRH_HASH_PAYLOAD_ONLY, 0, 0);
+ cmd_buf->cmd.target_addr = 0;
+ cmd_buf->cmd.data_size = cpu_to_le32(sizeof(cmd_buf->cmd_pl));
+ memcpy(&cmd_buf->cmd_pl, bcf_hdr, sizeof(*bcf_hdr));
+ ret = i2400m_bm_cmd(i2400m, &cmd_buf->cmd, sizeof(*cmd_buf),
+ &ack, sizeof(ack), 0);
+ if (ret >= 0)
+ ret = 0;
+ d_fnend(5, dev, "(i2400m %p bcf_hdr %p) = %d\n", i2400m, bcf_hdr, ret);
+ return ret;
+}
+
+
+/*
+ * Initialize the firmware download at the device size
+ *
+ * Multiplex to the one that matters based on the device's mode
+ * (signed or non-signed).
+ */
+static
+int i2400m_dnload_init(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ u32 module_id = le32_to_cpu(bcf->module_id);
+
+ if (i2400m->sboot == 0
+ && (module_id & I2400M_BCF_MOD_ID_POKES) == 0) {
+ /* non-signed boot process without pokes */
+ result = i2400m_dnload_init_nonsigned(i2400m);
+ if (result == -ERESTARTSYS)
+ return result;
+ if (result < 0)
+ dev_err(dev, "fw %s: non-signed download "
+ "initialization failed: %d\n",
+ i2400m->bus_fw_name, result);
+ } else if (i2400m->sboot == 0
+ && (module_id & I2400M_BCF_MOD_ID_POKES)) {
+ /* non-signed boot process with pokes, nothing to do */
+ result = 0;
+ } else { /* signed boot process */
+ result = i2400m_dnload_init_signed(i2400m, bcf);
+ if (result == -ERESTARTSYS)
+ return result;
+ if (result < 0)
+ dev_err(dev, "fw %s: signed boot download "
+ "initialization failed: %d\n",
+ i2400m->bus_fw_name, result);
+ }
+ return result;
+}
+
+
+/*
+ * Run quick consistency tests on the firmware file
+ *
+ * Check for the firmware being made for the i2400m device,
+ * etc...These checks are mostly informative, as the device will make
+ * them too; but the driver's response is more informative on what
+ * went wrong.
+ */
+static
+int i2400m_fw_check(struct i2400m *i2400m,
+ const struct i2400m_bcf_hdr *bcf,
+ size_t bcf_size)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ unsigned module_type, header_len, major_version, minor_version,
+ module_id, module_vendor, date, size;
+
+ /* Check hard errors */
+ result = -EINVAL;
+ if (bcf_size < sizeof(*bcf)) { /* big enough header? */
+ dev_err(dev, "firmware %s too short: "
+ "%zu B vs %zu (at least) expected\n",
+ i2400m->bus_fw_name, bcf_size, sizeof(*bcf));
+ goto error;
+ }
+
+ module_type = bcf->module_type;
+ header_len = sizeof(u32) * le32_to_cpu(bcf->header_len);
+ major_version = le32_to_cpu(bcf->header_version) & 0xffff0000 >> 16;
+ minor_version = le32_to_cpu(bcf->header_version) & 0x0000ffff;
+ module_id = le32_to_cpu(bcf->module_id);
+ module_vendor = le32_to_cpu(bcf->module_vendor);
+ date = le32_to_cpu(bcf->date);
+ size = sizeof(u32) * le32_to_cpu(bcf->size);
+
+ if (bcf_size != size) { /* annoyingly paranoid */
+ dev_err(dev, "firmware %s: bad size, got "
+ "%zu B vs %u expected\n",
+ i2400m->bus_fw_name, bcf_size, size);
+ goto error;
+ }
+
+ d_printf(2, dev, "type 0x%x id 0x%x vendor 0x%x; header v%u.%u (%zu B) "
+ "date %08x (%zu B)\n",
+ module_type, module_id, module_vendor,
+ major_version, minor_version, (size_t) header_len,
+ date, (size_t) size);
+
+ if (module_type != 6) { /* built for the right hardware? */
+ dev_err(dev, "bad fw %s: unexpected module type 0x%x; "
+ "aborting\n", i2400m->bus_fw_name, module_type);
+ goto error;
+ }
+
+ /* Check soft-er errors */
+ result = 0;
+ if (module_vendor != 0x8086)
+ dev_err(dev, "bad fw %s? unexpected vendor 0x%04x\n",
+ i2400m->bus_fw_name, module_vendor);
+ if (date < 0x20080300)
+ dev_err(dev, "bad fw %s? build date too old %08x\n",
+ i2400m->bus_fw_name, date);
+error:
+ return result;
+}
+
+
+/*
+ * Download the firmware to the device
+ *
+ * @i2400m: device descriptor
+ * @bcf: pointer to loaded (and minimally verified for consistency)
+ * firmware
+ * @bcf_size: size of the @bcf buffer (header plus payloads)
+ *
+ * The process for doing this is described in this file's header.
+ *
+ * Note we only reinitialize boot-mode if the flags say so. Some hw
+ * iterations need it, some don't. In any case, if we loop, we always
+ * need to reinitialize the boot room, hence the flags modification.
+ */
+static
+int i2400m_fw_dnload(struct i2400m *i2400m, const struct i2400m_bcf_hdr *bcf,
+ size_t bcf_size, enum i2400m_bri flags)
+{
+ int ret = 0;
+ struct device *dev = i2400m_dev(i2400m);
+ int count = I2400M_BOOT_RETRIES;
+
+ d_fnstart(5, dev, "(i2400m %p bcf %p size %zu)\n",
+ i2400m, bcf, bcf_size);
+ i2400m->boot_mode = 1;
+hw_reboot:
+ if (count-- == 0) {
+ ret = -ERESTARTSYS;
+ dev_err(dev, "device rebooted too many times, aborting\n");
+ goto error_too_many_reboots;
+ }
+ if (flags & I2400M_BRI_MAC_REINIT) {
+ ret = i2400m_bootrom_init(i2400m, flags);
+ if (ret < 0) {
+ dev_err(dev, "bootrom init failed: %d\n", ret);
+ goto error_bootrom_init;
+ }
+ }
+ flags |= I2400M_BRI_MAC_REINIT;
+
+ /*
+ * Initialize the download, push the bytes to the device and
+ * then jump to the new firmware. Note @ret is passed with the
+ * offset of the jump instruction to _dnload_finalize()
+ */
+ ret = i2400m_dnload_init(i2400m, bcf); /* Init device's dnload */
+ if (ret == -ERESTARTSYS)
+ goto error_dev_rebooted;
+ if (ret < 0)
+ goto error_dnload_init;
+
+ ret = i2400m_dnload_bcf(i2400m, bcf, bcf_size);
+ if (ret == -ERESTARTSYS)
+ goto error_dev_rebooted;
+ if (ret < 0) {
+ dev_err(dev, "fw %s: download failed: %d\n",
+ i2400m->bus_fw_name, ret);
+ goto error_dnload_bcf;
+ }
+
+ ret = i2400m_dnload_finalize(i2400m, bcf, ret);
+ if (ret == -ERESTARTSYS)
+ goto error_dev_rebooted;
+ if (ret < 0) {
+ dev_err(dev, "fw %s: "
+ "download finalization failed: %d\n",
+ i2400m->bus_fw_name, ret);
+ goto error_dnload_finalize;
+ }
+
+ d_printf(2, dev, "fw %s successfully uploaded\n",
+ i2400m->bus_fw_name);
+ i2400m->boot_mode = 0;
+error_dnload_finalize:
+error_dnload_bcf:
+error_dnload_init:
+error_bootrom_init:
+error_too_many_reboots:
+ d_fnend(5, dev, "(i2400m %p bcf %p size %zu) = %d\n",
+ i2400m, bcf, bcf_size, ret);
+ return ret;
+
+error_dev_rebooted:
+ dev_err(dev, "device rebooted, %d tries left\n", count);
+ /* we got the notification already, no need to wait for it again */
+ flags |= I2400M_BRI_SOFT;
+ goto hw_reboot;
+}
+
+
+/**
+ * i2400m_dev_bootstrap - Bring the device to a known state and upload firmware
+ *
+ * @i2400m: device descriptor
+ *
+ * Returns: >= 0 if ok, < 0 errno code on error.
+ *
+ * This sets up the firmware upload environment, loads the firmware
+ * file from disk, verifies and then calls the firmware upload process
+ * per se.
+ *
+ * Can be called either from probe, or after a warm reset. Can not be
+ * called from within an interrupt. All the flow in this code is
+ * single-threade; all I/Os are synchronous.
+ */
+int i2400m_dev_bootstrap(struct i2400m *i2400m, enum i2400m_bri flags)
+{
+ int ret = 0;
+ struct device *dev = i2400m_dev(i2400m);
+ const struct firmware *fw;
+ const struct i2400m_bcf_hdr *bcf; /* Firmware data */
+
+ d_fnstart(5, dev, "(i2400m %p)\n", i2400m);
+ /* Load firmware files to memory. */
+ ret = request_firmware(&fw, i2400m->bus_fw_name, dev);
+ if (ret) {
+ dev_err(dev, "fw %s: request failed: %d\n",
+ i2400m->bus_fw_name, ret);
+ goto error_fw_req;
+ }
+ bcf = (void *) fw->data;
+
+ ret = i2400m_fw_check(i2400m, bcf, fw->size);
+ if (ret < 0)
+ goto error_fw_bad;
+ ret = i2400m_fw_dnload(i2400m, bcf, fw->size, flags);
+error_fw_bad:
+ release_firmware(fw);
+error_fw_req:
+ d_fnend(5, dev, "(i2400m %p) = %d\n", i2400m, ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(i2400m_dev_bootstrap);
diff --git a/drivers/net/wimax/i2400m/i2400m-sdio.h b/drivers/net/wimax/i2400m/i2400m-sdio.h
new file mode 100644
index 000000000000..08c2fb739234
--- /dev/null
+++ b/drivers/net/wimax/i2400m/i2400m-sdio.h
@@ -0,0 +1,132 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * SDIO-specific i2400m driver definitions
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Brian Bian <brian.bian@intel.com>
+ * Dirk Brandewie <dirk.j.brandewie@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ *
+ *
+ * This driver implements the bus-specific part of the i2400m for
+ * SDIO. Check i2400m.h for a generic driver description.
+ *
+ * ARCHITECTURE
+ *
+ * This driver sits under the bus-generic i2400m driver, providing the
+ * connection to the device.
+ *
+ * When probed, all the function pointers are setup and then the
+ * bus-generic code called. The generic driver will then use the
+ * provided pointers for uploading firmware (i2400ms_bus_bm*() in
+ * sdio-fw.c) and then setting up the device (i2400ms_dev_*() in
+ * sdio.c).
+ *
+ * Once firmware is uploaded, TX functions (sdio-tx.c) are called when
+ * data is ready for transmission in the TX fifo; then the SDIO IRQ is
+ * fired and data is available (sdio-rx.c), it is sent to the generic
+ * driver for processing with i2400m_rx.
+ */
+
+#ifndef __I2400M_SDIO_H__
+#define __I2400M_SDIO_H__
+
+#include "i2400m.h"
+
+/* Host-Device interface for SDIO */
+enum {
+ I2400MS_BLK_SIZE = 256,
+ I2400MS_PL_SIZE_MAX = 0x3E00,
+
+ I2400MS_DATA_ADDR = 0x0,
+ I2400MS_INTR_STATUS_ADDR = 0x13,
+ I2400MS_INTR_CLEAR_ADDR = 0x13,
+ I2400MS_INTR_ENABLE_ADDR = 0x14,
+ I2400MS_INTR_GET_SIZE_ADDR = 0x2C,
+ /* The number of ticks to wait for the device to signal that
+ * it is ready */
+ I2400MS_INIT_SLEEP_INTERVAL = 10,
+};
+
+
+/**
+ * struct i2400ms - descriptor for a SDIO connected i2400m
+ *
+ * @i2400m: bus-generic i2400m implementation; has to be first (see
+ * it's documentation in i2400m.h).
+ *
+ * @func: pointer to our SDIO function
+ *
+ * @tx_worker: workqueue struct used to TX data when the bus-generic
+ * code signals packets are pending for transmission to the device.
+ *
+ * @tx_workqueue: workqeueue used for data TX; we don't use the
+ * system's workqueue as that might cause deadlocks with code in
+ * the bus-generic driver.
+ */
+struct i2400ms {
+ struct i2400m i2400m; /* FIRST! See doc */
+ struct sdio_func *func;
+
+ struct work_struct tx_worker;
+ struct workqueue_struct *tx_workqueue;
+ char tx_wq_name[32];
+
+ struct dentry *debugfs_dentry;
+};
+
+
+static inline
+void i2400ms_init(struct i2400ms *i2400ms)
+{
+ i2400m_init(&i2400ms->i2400m);
+}
+
+
+extern int i2400ms_rx_setup(struct i2400ms *);
+extern void i2400ms_rx_release(struct i2400ms *);
+extern ssize_t __i2400ms_rx_get_size(struct i2400ms *);
+
+extern int i2400ms_tx_setup(struct i2400ms *);
+extern void i2400ms_tx_release(struct i2400ms *);
+extern void i2400ms_bus_tx_kick(struct i2400m *);
+
+extern ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *,
+ const struct i2400m_bootrom_header *,
+ size_t, int);
+extern ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *,
+ struct i2400m_bootrom_header *,
+ size_t);
+#endif /* #ifndef __I2400M_SDIO_H__ */
diff --git a/drivers/net/wimax/i2400m/i2400m-usb.h b/drivers/net/wimax/i2400m/i2400m-usb.h
new file mode 100644
index 000000000000..6f76558b170f
--- /dev/null
+++ b/drivers/net/wimax/i2400m/i2400m-usb.h
@@ -0,0 +1,264 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * USB-specific i2400m driver definitions
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ *
+ *
+ * This driver implements the bus-specific part of the i2400m for
+ * USB. Check i2400m.h for a generic driver description.
+ *
+ * ARCHITECTURE
+ *
+ * This driver listens to notifications sent from the notification
+ * endpoint (in usb-notif.c); when data is ready to read, the code in
+ * there schedules a read from the device (usb-rx.c) and then passes
+ * the data to the generic RX code (rx.c).
+ *
+ * When the generic driver needs to send data (network or control), it
+ * queues up in the TX FIFO (tx.c) and that will notify the driver
+ * through the i2400m->bus_tx_kick() callback
+ * (usb-tx.c:i2400mu_bus_tx_kick) which will send the items in the
+ * FIFO queue.
+ *
+ * This driver, as well, implements the USB-specific ops for the generic
+ * driver to be able to setup/teardown communication with the device
+ * [i2400m_bus_dev_start() and i2400m_bus_dev_stop()], reseting the
+ * device [i2400m_bus_reset()] and performing firmware upload
+ * [i2400m_bus_bm_cmd() and i2400_bus_bm_wait_for_ack()].
+ */
+
+#ifndef __I2400M_USB_H__
+#define __I2400M_USB_H__
+
+#include "i2400m.h"
+#include <linux/kthread.h>
+
+
+/*
+ * Error Density Count: cheapo error density (over time) counter
+ *
+ * Originally by Reinette Chatre <reinette.chatre@intel.com>
+ *
+ * Embed an 'struct edc' somewhere. Each time there is a soft or
+ * retryable error, call edc_inc() and check if the error top
+ * watermark has been reached.
+ */
+enum {
+ EDC_MAX_ERRORS = 10,
+ EDC_ERROR_TIMEFRAME = HZ,
+};
+
+/* error density counter */
+struct edc {
+ unsigned long timestart;
+ u16 errorcount;
+};
+
+static inline void edc_init(struct edc *edc)
+{
+ edc->timestart = jiffies;
+}
+
+/**
+ * edc_inc - report a soft error and check if we are over the watermark
+ *
+ * @edc: pointer to error density counter.
+ * @max_err: maximum number of errors we can accept over the timeframe
+ * @timeframe: lenght of the timeframe (in jiffies).
+ *
+ * Returns: !0 1 if maximum acceptable errors per timeframe has been
+ * exceeded. 0 otherwise.
+ *
+ * This is way to determine if the number of acceptable errors per time
+ * period has been exceeded. It is not accurate as there are cases in which
+ * this scheme will not work, for example if there are periodic occurences
+ * of errors that straddle updates to the start time. This scheme is
+ * sufficient for our usage.
+ *
+ * To use, embed a 'struct edc' somewhere, initialize it with
+ * edc_init() and when an error hits:
+ *
+ * if (do_something_fails_with_a_soft_error) {
+ * if (edc_inc(&my->edc, MAX_ERRORS, MAX_TIMEFRAME))
+ * Ops, hard error, do something about it
+ * else
+ * Retry or ignore, depending on whatever
+ * }
+ */
+static inline int edc_inc(struct edc *edc, u16 max_err, u16 timeframe)
+{
+ unsigned long now;
+
+ now = jiffies;
+ if (now - edc->timestart > timeframe) {
+ edc->errorcount = 1;
+ edc->timestart = now;
+ } else if (++edc->errorcount > max_err) {
+ edc->errorcount = 0;
+ edc->timestart = now;
+ return 1;
+ }
+ return 0;
+}
+
+/* Host-Device interface for USB */
+enum {
+ I2400MU_MAX_NOTIFICATION_LEN = 256,
+ I2400MU_BLK_SIZE = 16,
+ I2400MU_PL_SIZE_MAX = 0x3EFF,
+
+ /* Endpoints */
+ I2400MU_EP_BULK_OUT = 0,
+ I2400MU_EP_NOTIFICATION,
+ I2400MU_EP_RESET_COLD,
+ I2400MU_EP_BULK_IN,
+};
+
+
+/**
+ * struct i2400mu - descriptor for a USB connected i2400m
+ *
+ * @i2400m: bus-generic i2400m implementation; has to be first (see
+ * it's documentation in i2400m.h).
+ *
+ * @usb_dev: pointer to our USB device
+ *
+ * @usb_iface: pointer to our USB interface
+ *
+ * @urb_edc: error density counter; used to keep a density-on-time tab
+ * on how many soft (retryable or ignorable) errors we get. If we
+ * go over the threshold, we consider the bus transport is failing
+ * too much and reset.
+ *
+ * @notif_urb: URB for receiving notifications from the device.
+ *
+ * @tx_kthread: thread we use for data TX. We use a thread because in
+ * order to do deep power saving and put the device to sleep, we
+ * need to call usb_autopm_*() [blocking functions].
+ *
+ * @tx_wq: waitqueue for the TX kthread to sleep when there is no data
+ * to be sent; when more data is available, it is woken up by
+ * i2400mu_bus_tx_kick().
+ *
+ * @rx_kthread: thread we use for data RX. We use a thread because in
+ * order to do deep power saving and put the device to sleep, we
+ * need to call usb_autopm_*() [blocking functions].
+ *
+ * @rx_wq: waitqueue for the RX kthread to sleep when there is no data
+ * to receive. When data is available, it is woken up by
+ * usb-notif.c:i2400mu_notification_grok().
+ *
+ * @rx_pending_count: number of rx-data-ready notifications that were
+ * still not handled by the RX kthread.
+ *
+ * @rx_size: current RX buffer size that is being used.
+ *
+ * @rx_size_acc: accumulator of the sizes of the previous read
+ * transactions.
+ *
+ * @rx_size_cnt: number of read transactions accumulated in
+ * @rx_size_acc.
+ *
+ * @do_autopm: disable(0)/enable(>0) calling the
+ * usb_autopm_get/put_interface() barriers when executing
+ * commands. See doc in i2400mu_suspend() for more information.
+ *
+ * @rx_size_auto_shrink: if true, the rx_size is shrinked
+ * automatically based on the average size of the received
+ * transactions. This allows the receive code to allocate smaller
+ * chunks of memory and thus reduce pressure on the memory
+ * allocator by not wasting so much space. By default it is
+ * enabled.
+ *
+ * @debugfs_dentry: hookup for debugfs files.
+ * These have to be in a separate directory, a child of
+ * (wimax_dev->debugfs_dentry) so they can be removed when the
+ * module unloads, as we don't keep each dentry.
+ */
+struct i2400mu {
+ struct i2400m i2400m; /* FIRST! See doc */
+
+ struct usb_device *usb_dev;
+ struct usb_interface *usb_iface;
+ struct edc urb_edc; /* Error density counter */
+
+ struct urb *notif_urb;
+ struct task_struct *tx_kthread;
+ wait_queue_head_t tx_wq;
+
+ struct task_struct *rx_kthread;
+ wait_queue_head_t rx_wq;
+ atomic_t rx_pending_count;
+ size_t rx_size, rx_size_acc, rx_size_cnt;
+ atomic_t do_autopm;
+ u8 rx_size_auto_shrink;
+
+ struct dentry *debugfs_dentry;
+};
+
+
+static inline
+void i2400mu_init(struct i2400mu *i2400mu)
+{
+ i2400m_init(&i2400mu->i2400m);
+ edc_init(&i2400mu->urb_edc);
+ init_waitqueue_head(&i2400mu->tx_wq);
+ atomic_set(&i2400mu->rx_pending_count, 0);
+ init_waitqueue_head(&i2400mu->rx_wq);
+ i2400mu->rx_size = PAGE_SIZE - sizeof(struct skb_shared_info);
+ atomic_set(&i2400mu->do_autopm, 1);
+ i2400mu->rx_size_auto_shrink = 1;
+}
+
+extern int i2400mu_notification_setup(struct i2400mu *);
+extern void i2400mu_notification_release(struct i2400mu *);
+
+extern int i2400mu_rx_setup(struct i2400mu *);
+extern void i2400mu_rx_release(struct i2400mu *);
+extern void i2400mu_rx_kick(struct i2400mu *);
+
+extern int i2400mu_tx_setup(struct i2400mu *);
+extern void i2400mu_tx_release(struct i2400mu *);
+extern void i2400mu_bus_tx_kick(struct i2400m *);
+
+extern ssize_t i2400mu_bus_bm_cmd_send(struct i2400m *,
+ const struct i2400m_bootrom_header *,
+ size_t, int);
+extern ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *,
+ struct i2400m_bootrom_header *,
+ size_t);
+#endif /* #ifndef __I2400M_USB_H__ */
diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h
new file mode 100644
index 000000000000..067c871cc226
--- /dev/null
+++ b/drivers/net/wimax/i2400m/i2400m.h
@@ -0,0 +1,755 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Declarations for bus-generic internal APIs
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ *
+ *
+ * GENERAL DRIVER ARCHITECTURE
+ *
+ * The i2400m driver is split in the following two major parts:
+ *
+ * - bus specific driver
+ * - bus generic driver (this part)
+ *
+ * The bus specific driver sets up stuff specific to the bus the
+ * device is connected to (USB, SDIO, PCI, tam-tam...non-authoritative
+ * nor binding list) which is basically the device-model management
+ * (probe/disconnect, etc), moving data from device to kernel and
+ * back, doing the power saving details and reseting the device.
+ *
+ * For details on each bus-specific driver, see it's include file,
+ * i2400m-BUSNAME.h
+ *
+ * The bus-generic functionality break up is:
+ *
+ * - Firmware upload: fw.c - takes care of uploading firmware to the
+ * device. bus-specific driver just needs to provides a way to
+ * execute boot-mode commands and to reset the device.
+ *
+ * - RX handling: rx.c - receives data from the bus-specific code and
+ * feeds it to the network or WiMAX stack or uses it to modify
+ * the driver state. bus-specific driver only has to receive
+ * frames and pass them to this module.
+ *
+ * - TX handling: tx.c - manages the TX FIFO queue and provides means
+ * for the bus-specific TX code to pull data from the FIFO
+ * queue. bus-specific code just pulls frames from this module
+ * to sends them to the device.
+ *
+ * - netdev glue: netdev.c - interface with Linux networking
+ * stack. Pass around data frames, and configure when the
+ * device is up and running or shutdown (through ifconfig up /
+ * down). Bus-generic only.
+ *
+ * - control ops: control.c - implements various commmands for
+ * controlling the device. bus-generic only.
+ *
+ * - device model glue: driver.c - implements helpers for the
+ * device-model glue done by the bus-specific layer
+ * (setup/release the driver resources), turning the device on
+ * and off, handling the device reboots/resets and a few simple
+ * WiMAX stack ops.
+ *
+ * Code is also broken up in linux-glue / device-glue.
+ *
+ * Linux glue contains functions that deal mostly with gluing with the
+ * rest of the Linux kernel.
+ *
+ * Device-glue are functions that deal mostly with the way the device
+ * does things and talk the device's language.
+ *
+ * device-glue code is licensed BSD so other open source OSes can take
+ * it to implement their drivers.
+ *
+ *
+ * APIs AND HEADER FILES
+ *
+ * This bus generic code exports three APIs:
+ *
+ * - HDI (host-device interface) definitions common to all busses
+ * (include/linux/wimax/i2400m.h); these can be also used by user
+ * space code.
+ * - internal API for the bus-generic code
+ * - external API for the bus-specific drivers
+ *
+ *
+ * LIFE CYCLE:
+ *
+ * When the bus-specific driver probes, it allocates a network device
+ * with enough space for it's data structue, that must contain a
+ * &struct i2400m at the top.
+ *
+ * On probe, it needs to fill the i2400m members marked as [fill], as
+ * well as i2400m->wimax_dev.net_dev and call i2400m_setup(). The
+ * i2400m driver will only register with the WiMAX and network stacks;
+ * the only access done to the device is to read the MAC address so we
+ * can register a network device. This calls i2400m_dev_start() to
+ * load firmware, setup communication with the device and configure it
+ * for operation.
+ *
+ * At this point, control and data communications are possible.
+ *
+ * On disconnect/driver unload, the bus-specific disconnect function
+ * calls i2400m_release() to undo i2400m_setup(). i2400m_dev_stop()
+ * shuts the firmware down and releases resources uses to communicate
+ * with the device.
+ *
+ * While the device is up, it might reset. The bus-specific driver has
+ * to catch that situation and call i2400m_dev_reset_handle() to deal
+ * with it (reset the internal driver structures and go back to square
+ * one).
+ */
+
+#ifndef __I2400M_H__
+#define __I2400M_H__
+
+#include <linux/usb.h>
+#include <linux/netdevice.h>
+#include <linux/completion.h>
+#include <linux/rwsem.h>
+#include <asm/atomic.h>
+#include <net/wimax.h>
+#include <linux/wimax/i2400m.h>
+#include <asm/byteorder.h>
+
+/* Misc constants */
+enum {
+ /* Firmware uploading */
+ I2400M_BOOT_RETRIES = 3,
+ /* Size of the Boot Mode Command buffer */
+ I2400M_BM_CMD_BUF_SIZE = 16 * 1024,
+ I2400M_BM_ACK_BUF_SIZE = 256,
+};
+
+
+/* Firmware version we request when pulling the fw image file */
+#define I2400M_FW_VERSION "1.3"
+
+
+/**
+ * i2400m_reset_type - methods to reset a device
+ *
+ * @I2400M_RT_WARM: Reset without device disconnection, device handles
+ * are kept valid but state is back to power on, with firmware
+ * re-uploaded.
+ * @I2400M_RT_COLD: Tell the device to disconnect itself from the bus
+ * and reconnect. Renders all device handles invalid.
+ * @I2400M_RT_BUS: Tells the bus to reset the device; last measure
+ * used when both types above don't work.
+ */
+enum i2400m_reset_type {
+ I2400M_RT_WARM, /* first measure */
+ I2400M_RT_COLD, /* second measure */
+ I2400M_RT_BUS, /* call in artillery */
+};
+
+struct i2400m_reset_ctx;
+
+/**
+ * struct i2400m - descriptor for an Intel 2400m
+ *
+ * Members marked with [fill] must be filled out/initialized before
+ * calling i2400m_setup().
+ *
+ * @bus_tx_block_size: [fill] SDIO imposes a 256 block size, USB 16,
+ * so we have a tx_blk_size variable that the bus layer sets to
+ * tell the engine how much of that we need.
+ *
+ * @bus_pl_size_max: [fill] Maximum payload size.
+ *
+ * @bus_dev_start: [fill] Function called by the bus-generic code
+ * [i2400m_dev_start()] to setup the bus-specific communications
+ * to the the device. See LIFE CYCLE above.
+ *
+ * NOTE: Doesn't need to upload the firmware, as that is taken
+ * care of by the bus-generic code.
+ *
+ * @bus_dev_stop: [fill] Function called by the bus-generic code
+ * [i2400m_dev_stop()] to shutdown the bus-specific communications
+ * to the the device. See LIFE CYCLE above.
+ *
+ * This function does not need to reset the device, just tear down
+ * all the host resources created to handle communication with
+ * the device.
+ *
+ * @bus_tx_kick: [fill] Function called by the bus-generic code to let
+ * the bus-specific code know that there is data available in the
+ * TX FIFO for transmission to the device.
+ *
+ * This function cannot sleep.
+ *
+ * @bus_reset: [fill] Function called by the bus-generic code to reset
+ * the device in in various ways. Doesn't need to wait for the
+ * reset to finish.
+ *
+ * If warm or cold reset fail, this function is expected to do a
+ * bus-specific reset (eg: USB reset) to get the device to a
+ * working state (even if it implies device disconecction).
+ *
+ * Note the warm reset is used by the firmware uploader to
+ * reinitialize the device.
+ *
+ * IMPORTANT: this is called very early in the device setup
+ * process, so it cannot rely on common infrastructure being laid
+ * out.
+ *
+ * @bus_bm_cmd_send: [fill] Function called to send a boot-mode
+ * command. Flags are defined in 'enum i2400m_bm_cmd_flags'. This
+ * is synchronous and has to return 0 if ok or < 0 errno code in
+ * any error condition.
+ *
+ * @bus_bm_wait_for_ack: [fill] Function called to wait for a
+ * boot-mode notification (that can be a response to a previously
+ * issued command or an asynchronous one). Will read until all the
+ * indicated size is read or timeout. Reading more or less data
+ * than asked for is an error condition. Return 0 if ok, < 0 errno
+ * code on error.
+ *
+ * The caller to this function will check if the response is a
+ * barker that indicates the device going into reset mode.
+ *
+ * @bus_fw_name: [fill] name of the firmware image (in most cases,
+ * they are all the same for a single release, except that they
+ * have the type of the bus embedded in the name (eg:
+ * i2400m-fw-X-VERSION.sbcf, where X is the bus name).
+ *
+ * @bus_bm_mac_addr_impaired: [fill] Set to true if the device's MAC
+ * address provided in boot mode is kind of broken and needs to
+ * be re-read later on.
+ *
+ *
+ * @wimax_dev: WiMAX generic device for linkage into the kernel WiMAX
+ * stack. Due to the way a net_device is allocated, we need to
+ * force this to be the first field so that we can get from
+ * netdev_priv() the right pointer.
+ *
+ * @state: device's state (as reported by it)
+ *
+ * @state_wq: waitqueue that is woken up whenever the state changes
+ *
+ * @tx_lock: spinlock to protect TX members
+ *
+ * @tx_buf: FIFO buffer for TX; we queue data here
+ *
+ * @tx_in: FIFO index for incoming data. Note this doesn't wrap around
+ * and it is always greater than @tx_out.
+ *
+ * @tx_out: FIFO index for outgoing data
+ *
+ * @tx_msg: current TX message that is active in the FIFO for
+ * appending payloads.
+ *
+ * @tx_sequence: current sequence number for TX messages from the
+ * device to the host.
+ *
+ * @tx_msg_size: size of the current message being transmitted by the
+ * bus-specific code.
+ *
+ * @tx_pl_num: total number of payloads sent
+ *
+ * @tx_pl_max: maximum number of payloads sent in a TX message
+ *
+ * @tx_pl_min: minimum number of payloads sent in a TX message
+ *
+ * @tx_num: number of TX messages sent
+ *
+ * @tx_size_acc: number of bytes in all TX messages sent
+ * (this is different to net_dev's statistics as it also counts
+ * control messages).
+ *
+ * @tx_size_min: smallest TX message sent.
+ *
+ * @tx_size_max: biggest TX message sent.
+ *
+ * @rx_lock: spinlock to protect RX members
+ *
+ * @rx_pl_num: total number of payloads received
+ *
+ * @rx_pl_max: maximum number of payloads received in a RX message
+ *
+ * @rx_pl_min: minimum number of payloads received in a RX message
+ *
+ * @rx_num: number of RX messages received
+ *
+ * @rx_size_acc: number of bytes in all RX messages received
+ * (this is different to net_dev's statistics as it also counts
+ * control messages).
+ *
+ * @rx_size_min: smallest RX message received.
+ *
+ * @rx_size_max: buggest RX message received.
+ *
+ * @init_mutex: Mutex used for serializing the device bringup
+ * sequence; this way if the device reboots in the middle, we
+ * don't try to do a bringup again while we are tearing down the
+ * one that failed.
+ *
+ * Can't reuse @msg_mutex because from within the bringup sequence
+ * we need to send messages to the device and thus use @msg_mutex.
+ *
+ * @msg_mutex: mutex used to send control commands to the device (we
+ * only allow one at a time, per host-device interface design).
+ *
+ * @msg_completion: used to wait for an ack to a control command sent
+ * to the device.
+ *
+ * @ack_skb: used to store the actual ack to a control command if the
+ * reception of the command was successful. Otherwise, a ERR_PTR()
+ * errno code that indicates what failed with the ack reception.
+ *
+ * Only valid after @msg_completion is woken up. Only updateable
+ * if @msg_completion is armed. Only touched by
+ * i2400m_msg_to_dev().
+ *
+ * Protected by @rx_lock. In theory the command execution flow is
+ * sequential, but in case the device sends an out-of-phase or
+ * very delayed response, we need to avoid it trampling current
+ * execution.
+ *
+ * @bm_cmd_buf: boot mode command buffer for composing firmware upload
+ * commands.
+ *
+ * USB can't r/w to stack, vmalloc, etc...as well, we end up
+ * having to alloc/free a lot to compose commands, so we use these
+ * for stagging and not having to realloc all the time.
+ *
+ * This assumes the code always runs serialized. Only one thread
+ * can call i2400m_bm_cmd() at the same time.
+ *
+ * @bm_ack_buf: boot mode acknoledge buffer for staging reception of
+ * responses to commands.
+ *
+ * See @bm_cmd_buf.
+ *
+ * @work_queue: work queue for processing device reports. This
+ * workqueue cannot be used for processing TX or RX to the device,
+ * as from it we'll process device reports, which might require
+ * further communication with the device.
+ *
+ * @debugfs_dentry: hookup for debugfs files.
+ * These have to be in a separate directory, a child of
+ * (wimax_dev->debugfs_dentry) so they can be removed when the
+ * module unloads, as we don't keep each dentry.
+ */
+struct i2400m {
+ struct wimax_dev wimax_dev; /* FIRST! See doc */
+
+ unsigned updown:1; /* Network device is up or down */
+ unsigned boot_mode:1; /* is the device in boot mode? */
+ unsigned sboot:1; /* signed or unsigned fw boot */
+ unsigned ready:1; /* all probing steps done */
+ u8 trace_msg_from_user; /* echo rx msgs to 'trace' pipe */
+ /* typed u8 so debugfs/u8 can tweak */
+ enum i2400m_system_state state;
+ wait_queue_head_t state_wq; /* Woken up when on state updates */
+
+ size_t bus_tx_block_size;
+ size_t bus_pl_size_max;
+ int (*bus_dev_start)(struct i2400m *);
+ void (*bus_dev_stop)(struct i2400m *);
+ void (*bus_tx_kick)(struct i2400m *);
+ int (*bus_reset)(struct i2400m *, enum i2400m_reset_type);
+ ssize_t (*bus_bm_cmd_send)(struct i2400m *,
+ const struct i2400m_bootrom_header *,
+ size_t, int flags);
+ ssize_t (*bus_bm_wait_for_ack)(struct i2400m *,
+ struct i2400m_bootrom_header *, size_t);
+ const char *bus_fw_name;
+ unsigned bus_bm_mac_addr_impaired:1;
+
+ spinlock_t tx_lock; /* protect TX state */
+ void *tx_buf;
+ size_t tx_in, tx_out;
+ struct i2400m_msg_hdr *tx_msg;
+ size_t tx_sequence, tx_msg_size;
+ /* TX stats */
+ unsigned tx_pl_num, tx_pl_max, tx_pl_min,
+ tx_num, tx_size_acc, tx_size_min, tx_size_max;
+
+ /* RX stats */
+ spinlock_t rx_lock; /* protect RX state */
+ unsigned rx_pl_num, rx_pl_max, rx_pl_min,
+ rx_num, rx_size_acc, rx_size_min, rx_size_max;
+
+ struct mutex msg_mutex; /* serialize command execution */
+ struct completion msg_completion;
+ struct sk_buff *ack_skb; /* protected by rx_lock */
+
+ void *bm_ack_buf; /* for receiving acks over USB */
+ void *bm_cmd_buf; /* for issuing commands over USB */
+
+ struct workqueue_struct *work_queue;
+
+ struct mutex init_mutex; /* protect bringup seq */
+ struct i2400m_reset_ctx *reset_ctx; /* protected by init_mutex */
+
+ struct work_struct wake_tx_ws;
+ struct sk_buff *wake_tx_skb;
+
+ struct dentry *debugfs_dentry;
+};
+
+
+/*
+ * Initialize a 'struct i2400m' from all zeroes
+ *
+ * This is a bus-generic API call.
+ */
+static inline
+void i2400m_init(struct i2400m *i2400m)
+{
+ wimax_dev_init(&i2400m->wimax_dev);
+
+ i2400m->boot_mode = 1;
+ init_waitqueue_head(&i2400m->state_wq);
+
+ spin_lock_init(&i2400m->tx_lock);
+ i2400m->tx_pl_min = UINT_MAX;
+ i2400m->tx_size_min = UINT_MAX;
+
+ spin_lock_init(&i2400m->rx_lock);
+ i2400m->rx_pl_min = UINT_MAX;
+ i2400m->rx_size_min = UINT_MAX;
+
+ mutex_init(&i2400m->msg_mutex);
+ init_completion(&i2400m->msg_completion);
+
+ mutex_init(&i2400m->init_mutex);
+ /* wake_tx_ws is initialized in i2400m_tx_setup() */
+}
+
+
+/*
+ * Bus-generic internal APIs
+ * -------------------------
+ */
+
+static inline
+struct i2400m *wimax_dev_to_i2400m(struct wimax_dev *wimax_dev)
+{
+ return container_of(wimax_dev, struct i2400m, wimax_dev);
+}
+
+static inline
+struct i2400m *net_dev_to_i2400m(struct net_device *net_dev)
+{
+ return wimax_dev_to_i2400m(netdev_priv(net_dev));
+}
+
+/*
+ * Boot mode support
+ */
+
+/**
+ * i2400m_bm_cmd_flags - flags to i2400m_bm_cmd()
+ *
+ * @I2400M_BM_CMD_RAW: send the command block as-is, without doing any
+ * extra processing for adding CRC.
+ */
+enum i2400m_bm_cmd_flags {
+ I2400M_BM_CMD_RAW = 1 << 2,
+};
+
+/**
+ * i2400m_bri - Boot-ROM indicators
+ *
+ * Flags for i2400m_bootrom_init() and i2400m_dev_bootstrap() [which
+ * are passed from things like i2400m_setup()]. Can be combined with
+ * |.
+ *
+ * @I2400M_BRI_SOFT: The device rebooted already and a reboot
+ * barker received, proceed directly to ack the boot sequence.
+ * @I2400M_BRI_NO_REBOOT: Do not reboot the device and proceed
+ * directly to wait for a reboot barker from the device.
+ * @I2400M_BRI_MAC_REINIT: We need to reinitialize the boot
+ * rom after reading the MAC adress. This is quite a dirty hack,
+ * if you ask me -- the device requires the bootrom to be
+ * intialized after reading the MAC address.
+ */
+enum i2400m_bri {
+ I2400M_BRI_SOFT = 1 << 1,
+ I2400M_BRI_NO_REBOOT = 1 << 2,
+ I2400M_BRI_MAC_REINIT = 1 << 3,
+};
+
+extern void i2400m_bm_cmd_prepare(struct i2400m_bootrom_header *);
+extern int i2400m_dev_bootstrap(struct i2400m *, enum i2400m_bri);
+extern int i2400m_read_mac_addr(struct i2400m *);
+extern int i2400m_bootrom_init(struct i2400m *, enum i2400m_bri);
+
+/* Make/grok boot-rom header commands */
+
+static inline
+__le32 i2400m_brh_command(enum i2400m_brh_opcode opcode, unsigned use_checksum,
+ unsigned direct_access)
+{
+ return cpu_to_le32(
+ I2400M_BRH_SIGNATURE
+ | (direct_access ? I2400M_BRH_DIRECT_ACCESS : 0)
+ | I2400M_BRH_RESPONSE_REQUIRED /* response always required */
+ | (use_checksum ? I2400M_BRH_USE_CHECKSUM : 0)
+ | (opcode & I2400M_BRH_OPCODE_MASK));
+}
+
+static inline
+void i2400m_brh_set_opcode(struct i2400m_bootrom_header *hdr,
+ enum i2400m_brh_opcode opcode)
+{
+ hdr->command = cpu_to_le32(
+ (le32_to_cpu(hdr->command) & ~I2400M_BRH_OPCODE_MASK)
+ | (opcode & I2400M_BRH_OPCODE_MASK));
+}
+
+static inline
+unsigned i2400m_brh_get_opcode(const struct i2400m_bootrom_header *hdr)
+{
+ return le32_to_cpu(hdr->command) & I2400M_BRH_OPCODE_MASK;
+}
+
+static inline
+unsigned i2400m_brh_get_response(const struct i2400m_bootrom_header *hdr)
+{
+ return (le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_MASK)
+ >> I2400M_BRH_RESPONSE_SHIFT;
+}
+
+static inline
+unsigned i2400m_brh_get_use_checksum(const struct i2400m_bootrom_header *hdr)
+{
+ return le32_to_cpu(hdr->command) & I2400M_BRH_USE_CHECKSUM;
+}
+
+static inline
+unsigned i2400m_brh_get_response_required(
+ const struct i2400m_bootrom_header *hdr)
+{
+ return le32_to_cpu(hdr->command) & I2400M_BRH_RESPONSE_REQUIRED;
+}
+
+static inline
+unsigned i2400m_brh_get_direct_access(const struct i2400m_bootrom_header *hdr)
+{
+ return le32_to_cpu(hdr->command) & I2400M_BRH_DIRECT_ACCESS;
+}
+
+static inline
+unsigned i2400m_brh_get_signature(const struct i2400m_bootrom_header *hdr)
+{
+ return (le32_to_cpu(hdr->command) & I2400M_BRH_SIGNATURE_MASK)
+ >> I2400M_BRH_SIGNATURE_SHIFT;
+}
+
+
+/*
+ * Driver / device setup and internal functions
+ */
+extern void i2400m_netdev_setup(struct net_device *net_dev);
+extern int i2400m_tx_setup(struct i2400m *);
+extern void i2400m_wake_tx_work(struct work_struct *);
+extern void i2400m_tx_release(struct i2400m *);
+
+extern void i2400m_net_rx(struct i2400m *, struct sk_buff *, unsigned,
+ const void *, int);
+enum i2400m_pt;
+extern int i2400m_tx(struct i2400m *, const void *, size_t, enum i2400m_pt);
+
+#ifdef CONFIG_DEBUG_FS
+extern int i2400m_debugfs_add(struct i2400m *);
+extern void i2400m_debugfs_rm(struct i2400m *);
+#else
+static inline int i2400m_debugfs_add(struct i2400m *i2400m)
+{
+ return 0;
+}
+static inline void i2400m_debugfs_rm(struct i2400m *i2400m) {}
+#endif
+
+/* Called by _dev_start()/_dev_stop() to initialize the device itself */
+extern int i2400m_dev_initialize(struct i2400m *);
+extern void i2400m_dev_shutdown(struct i2400m *);
+
+extern struct attribute_group i2400m_dev_attr_group;
+
+extern int i2400m_schedule_work(struct i2400m *,
+ void (*)(struct work_struct *), gfp_t);
+
+/* HDI message's payload description handling */
+
+static inline
+size_t i2400m_pld_size(const struct i2400m_pld *pld)
+{
+ return I2400M_PLD_SIZE_MASK & le32_to_cpu(pld->val);
+}
+
+static inline
+enum i2400m_pt i2400m_pld_type(const struct i2400m_pld *pld)
+{
+ return (I2400M_PLD_TYPE_MASK & le32_to_cpu(pld->val))
+ >> I2400M_PLD_TYPE_SHIFT;
+}
+
+static inline
+void i2400m_pld_set(struct i2400m_pld *pld, size_t size,
+ enum i2400m_pt type)
+{
+ pld->val = cpu_to_le32(
+ ((type << I2400M_PLD_TYPE_SHIFT) & I2400M_PLD_TYPE_MASK)
+ | (size & I2400M_PLD_SIZE_MASK));
+}
+
+
+/*
+ * API for the bus-specific drivers
+ * --------------------------------
+ */
+
+static inline
+struct i2400m *i2400m_get(struct i2400m *i2400m)
+{
+ dev_hold(i2400m->wimax_dev.net_dev);
+ return i2400m;
+}
+
+static inline
+void i2400m_put(struct i2400m *i2400m)
+{
+ dev_put(i2400m->wimax_dev.net_dev);
+}
+
+extern int i2400m_dev_reset_handle(struct i2400m *);
+
+/*
+ * _setup()/_release() are called by the probe/disconnect functions of
+ * the bus-specific drivers.
+ */
+extern int i2400m_setup(struct i2400m *, enum i2400m_bri bm_flags);
+extern void i2400m_release(struct i2400m *);
+
+extern int i2400m_rx(struct i2400m *, struct sk_buff *);
+extern struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *, size_t *);
+extern void i2400m_tx_msg_sent(struct i2400m *);
+
+static const __le32 i2400m_NBOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_NBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_NBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_NBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_NBOOT_BARKER)
+};
+
+static const __le32 i2400m_SBOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_SBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_SBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_SBOOT_BARKER),
+ __constant_cpu_to_le32(I2400M_SBOOT_BARKER)
+};
+
+
+/*
+ * Utility functions
+ */
+
+static inline
+struct device *i2400m_dev(struct i2400m *i2400m)
+{
+ return i2400m->wimax_dev.net_dev->dev.parent;
+}
+
+/*
+ * Helper for scheduling simple work functions
+ *
+ * This struct can get any kind of payload attached (normally in the
+ * form of a struct where you pack the stuff you want to pass to the
+ * _work function).
+ */
+struct i2400m_work {
+ struct work_struct ws;
+ struct i2400m *i2400m;
+ u8 pl[0];
+};
+extern int i2400m_queue_work(struct i2400m *,
+ void (*)(struct work_struct *), gfp_t,
+ const void *, size_t);
+
+extern int i2400m_msg_check_status(const struct i2400m_l3l4_hdr *,
+ char *, size_t);
+extern int i2400m_msg_size_check(struct i2400m *,
+ const struct i2400m_l3l4_hdr *, size_t);
+extern struct sk_buff *i2400m_msg_to_dev(struct i2400m *, const void *, size_t);
+extern void i2400m_msg_to_dev_cancel_wait(struct i2400m *, int);
+extern void i2400m_msg_ack_hook(struct i2400m *,
+ const struct i2400m_l3l4_hdr *, size_t);
+extern void i2400m_report_hook(struct i2400m *,
+ const struct i2400m_l3l4_hdr *, size_t);
+extern int i2400m_cmd_enter_powersave(struct i2400m *);
+extern int i2400m_cmd_get_state(struct i2400m *);
+extern int i2400m_cmd_exit_idle(struct i2400m *);
+extern struct sk_buff *i2400m_get_device_info(struct i2400m *);
+extern int i2400m_firmware_check(struct i2400m *);
+extern int i2400m_set_init_config(struct i2400m *,
+ const struct i2400m_tlv_hdr **, size_t);
+
+static inline
+struct usb_endpoint_descriptor *usb_get_epd(struct usb_interface *iface, int ep)
+{
+ return &iface->cur_altsetting->endpoint[ep].desc;
+}
+
+extern int i2400m_op_rfkill_sw_toggle(struct wimax_dev *,
+ enum wimax_rf_state);
+extern void i2400m_report_tlv_rf_switches_status(
+ struct i2400m *, const struct i2400m_tlv_rf_switches_status *);
+
+
+/*
+ * Do a millisecond-sleep for allowing wireshark to dump all the data
+ * packets. Used only for debugging.
+ */
+static inline
+void __i2400m_msleep(unsigned ms)
+{
+#if 1
+#else
+ msleep(ms);
+#endif
+}
+
+/* Module parameters */
+
+extern int i2400m_idle_mode_disabled;
+
+
+#endif /* #ifndef __I2400M_H__ */
diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c
new file mode 100644
index 000000000000..63fe708e8a31
--- /dev/null
+++ b/drivers/net/wimax/i2400m/netdev.c
@@ -0,0 +1,524 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Glue with the networking stack
+ *
+ *
+ * Copyright (C) 2007 Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * This implements an ethernet device for the i2400m.
+ *
+ * We fake being an ethernet device to simplify the support from user
+ * space and from the other side. The world is (sadly) configured to
+ * take in only Ethernet devices...
+ *
+ * Because of this, currently there is an copy-each-rxed-packet
+ * overhead on the RX path. Each IP packet has to be reallocated to
+ * add an ethernet header (as there is no space in what we get from
+ * the device). This is a known drawback and coming versions of the
+ * device's firmware are being changed to add header space that can be
+ * used to insert the ethernet header without having to reallocate and
+ * copy.
+ *
+ * TX error handling is tricky; because we have to FIFO/queue the
+ * buffers for transmission (as the hardware likes it aggregated), we
+ * just give the skb to the TX subsystem and by the time it is
+ * transmitted, we have long forgotten about it. So we just don't care
+ * too much about it.
+ *
+ * Note that when the device is in idle mode with the basestation, we
+ * need to negotiate coming back up online. That involves negotiation
+ * and possible user space interaction. Thus, we defer to a workqueue
+ * to do all that. By default, we only queue a single packet and drop
+ * the rest, as potentially the time to go back from idle to normal is
+ * long.
+ *
+ * ROADMAP
+ *
+ * i2400m_open Called on ifconfig up
+ * i2400m_stop Called on ifconfig down
+ *
+ * i2400m_hard_start_xmit Called by the network stack to send a packet
+ * i2400m_net_wake_tx Wake up device from basestation-IDLE & TX
+ * i2400m_wake_tx_work
+ * i2400m_cmd_exit_idle
+ * i2400m_tx
+ * i2400m_net_tx TX a data frame
+ * i2400m_tx
+ *
+ * i2400m_change_mtu Called on ifconfig mtu XXX
+ *
+ * i2400m_tx_timeout Called when the device times out
+ *
+ * i2400m_net_rx Called by the RX code when a data frame is
+ * available.
+ * i2400m_netdev_setup Called to setup all the netdev stuff from
+ * alloc_netdev.
+ */
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE netdev
+#include "debug-levels.h"
+
+enum {
+/* netdev interface */
+ /*
+ * Out of NWG spec (R1_v1.2.2), 3.3.3 ASN Bearer Plane MTU Size
+ *
+ * The MTU is 1400 or less
+ */
+ I2400M_MAX_MTU = 1400,
+ I2400M_TX_TIMEOUT = HZ,
+ I2400M_TX_QLEN = 5,
+};
+
+
+static
+int i2400m_open(struct net_device *net_dev)
+{
+ int result;
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
+ if (i2400m->ready == 0) {
+ dev_err(dev, "Device is still initializing\n");
+ result = -EBUSY;
+ } else
+ result = 0;
+ d_fnend(3, dev, "(net_dev %p [i2400m %p]) = %d\n",
+ net_dev, i2400m, result);
+ return result;
+}
+
+
+/*
+ *
+ * On kernel versions where cancel_work_sync() didn't return anything,
+ * we rely on wake_tx_skb() being non-NULL.
+ */
+static
+int i2400m_stop(struct net_device *net_dev)
+{
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(net_dev %p [i2400m %p])\n", net_dev, i2400m);
+ /* See i2400m_hard_start_xmit(), references are taken there
+ * and here we release them if the work was still
+ * pending. Note we can't differentiate work not pending vs
+ * never scheduled, so the NULL check does that. */
+ if (cancel_work_sync(&i2400m->wake_tx_ws) == 0
+ && i2400m->wake_tx_skb != NULL) {
+ unsigned long flags;
+ struct sk_buff *wake_tx_skb;
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ wake_tx_skb = i2400m->wake_tx_skb; /* compat help */
+ i2400m->wake_tx_skb = NULL; /* compat help */
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ i2400m_put(i2400m);
+ kfree_skb(wake_tx_skb);
+ }
+ d_fnend(3, dev, "(net_dev %p [i2400m %p]) = 0\n", net_dev, i2400m);
+ return 0;
+}
+
+
+/*
+ * Wake up the device and transmit a held SKB, then restart the net queue
+ *
+ * When the device goes into basestation-idle mode, we need to tell it
+ * to exit that mode; it will negotiate with the base station, user
+ * space may have to intervene to rehandshake crypto and then tell us
+ * when it is ready to transmit the packet we have "queued". Still we
+ * need to give it sometime after it reports being ok.
+ *
+ * On error, there is not much we can do. If the error was on TX, we
+ * still wake the queue up to see if the next packet will be luckier.
+ *
+ * If _cmd_exit_idle() fails...well, it could be many things; most
+ * commonly it is that something else took the device out of IDLE mode
+ * (for example, the base station). In that case we get an -EILSEQ and
+ * we are just going to ignore that one. If the device is back to
+ * connected, then fine -- if it is someother state, the packet will
+ * be dropped anyway.
+ */
+void i2400m_wake_tx_work(struct work_struct *ws)
+{
+ int result;
+ struct i2400m *i2400m = container_of(ws, struct i2400m, wake_tx_ws);
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *skb = i2400m->wake_tx_skb;
+ unsigned long flags;
+
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ skb = i2400m->wake_tx_skb;
+ i2400m->wake_tx_skb = NULL;
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+
+ d_fnstart(3, dev, "(ws %p i2400m %p skb %p)\n", ws, i2400m, skb);
+ result = -EINVAL;
+ if (skb == NULL) {
+ dev_err(dev, "WAKE&TX: skb dissapeared!\n");
+ goto out_put;
+ }
+ result = i2400m_cmd_exit_idle(i2400m);
+ if (result == -EILSEQ)
+ result = 0;
+ if (result < 0) {
+ dev_err(dev, "WAKE&TX: device didn't get out of idle: "
+ "%d\n", result);
+ goto error;
+ }
+ result = wait_event_timeout(i2400m->state_wq,
+ i2400m->state != I2400M_SS_IDLE, 5 * HZ);
+ if (result == 0)
+ result = -ETIMEDOUT;
+ if (result < 0) {
+ dev_err(dev, "WAKE&TX: error waiting for device to exit IDLE: "
+ "%d\n", result);
+ goto error;
+ }
+ msleep(20); /* device still needs some time or it drops it */
+ result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
+ netif_wake_queue(i2400m->wimax_dev.net_dev);
+error:
+ kfree_skb(skb); /* refcount transferred by _hard_start_xmit() */
+out_put:
+ i2400m_put(i2400m);
+ d_fnend(3, dev, "(ws %p i2400m %p skb %p) = void [%d]\n",
+ ws, i2400m, skb, result);
+}
+
+
+/*
+ * Prepare the data payload TX header
+ *
+ * The i2400m expects a 4 byte header in front of a data packet.
+ *
+ * Because we pretend to be an ethernet device, this packet comes with
+ * an ethernet header. Pull it and push our header.
+ */
+static
+void i2400m_tx_prep_header(struct sk_buff *skb)
+{
+ struct i2400m_pl_data_hdr *pl_hdr;
+ skb_pull(skb, ETH_HLEN);
+ pl_hdr = (struct i2400m_pl_data_hdr *) skb_push(skb, sizeof(*pl_hdr));
+ pl_hdr->reserved = 0;
+}
+
+
+/*
+ * TX an skb to an idle device
+ *
+ * When the device is in basestation-idle mode, we need to wake it up
+ * and then TX. So we queue a work_struct for doing so.
+ *
+ * We need to get an extra ref for the skb (so it is not dropped), as
+ * well as be careful not to queue more than one request (won't help
+ * at all). If more than one request comes or there are errors, we
+ * just drop the packets (see i2400m_hard_start_xmit()).
+ */
+static
+int i2400m_net_wake_tx(struct i2400m *i2400m, struct net_device *net_dev,
+ struct sk_buff *skb)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ unsigned long flags;
+
+ d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
+ if (net_ratelimit()) {
+ d_printf(3, dev, "WAKE&NETTX: "
+ "skb %p sending %d bytes to radio\n",
+ skb, skb->len);
+ d_dump(4, dev, skb->data, skb->len);
+ }
+ /* We hold a ref count for i2400m and skb, so when
+ * stopping() the device, we need to cancel that work
+ * and if pending, release those resources. */
+ result = 0;
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ if (!work_pending(&i2400m->wake_tx_ws)) {
+ netif_stop_queue(net_dev);
+ i2400m_get(i2400m);
+ i2400m->wake_tx_skb = skb_get(skb); /* transfer ref count */
+ i2400m_tx_prep_header(skb);
+ result = schedule_work(&i2400m->wake_tx_ws);
+ WARN_ON(result == 0);
+ }
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ if (result == 0) {
+ /* Yes, this happens even if we stopped the
+ * queue -- blame the queue disciplines that
+ * queue without looking -- I guess there is a reason
+ * for that. */
+ if (net_ratelimit())
+ d_printf(1, dev, "NETTX: device exiting idle, "
+ "dropping skb %p, queue running %d\n",
+ skb, netif_queue_stopped(net_dev));
+ result = -EBUSY;
+ }
+ d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
+ return result;
+}
+
+
+/*
+ * Transmit a packet to the base station on behalf of the network stack.
+ *
+ * Returns: 0 if ok, < 0 errno code on error.
+ *
+ * We need to pull the ethernet header and add the hardware header,
+ * which is currently set to all zeroes and reserved.
+ */
+static
+int i2400m_net_tx(struct i2400m *i2400m, struct net_device *net_dev,
+ struct sk_buff *skb)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p net_dev %p skb %p)\n",
+ i2400m, net_dev, skb);
+ /* FIXME: check eth hdr, only IPv4 is routed by the device as of now */
+ net_dev->trans_start = jiffies;
+ i2400m_tx_prep_header(skb);
+ d_printf(3, dev, "NETTX: skb %p sending %d bytes to radio\n",
+ skb, skb->len);
+ d_dump(4, dev, skb->data, skb->len);
+ result = i2400m_tx(i2400m, skb->data, skb->len, I2400M_PT_DATA);
+ d_fnend(3, dev, "(i2400m %p net_dev %p skb %p) = %d\n",
+ i2400m, net_dev, skb, result);
+ return result;
+}
+
+
+/*
+ * Transmit a packet to the base station on behalf of the network stack
+ *
+ *
+ * Returns: NETDEV_TX_OK (always, even in case of error)
+ *
+ * In case of error, we just drop it. Reasons:
+ *
+ * - we add a hw header to each skb, and if the network stack
+ * retries, we have no way to know if that skb has it or not.
+ *
+ * - network protocols have their own drop-recovery mechanisms
+ *
+ * - there is not much else we can do
+ *
+ * If the device is idle, we need to wake it up; that is an operation
+ * that will sleep. See i2400m_net_wake_tx() for details.
+ */
+static
+int i2400m_hard_start_xmit(struct sk_buff *skb,
+ struct net_device *net_dev)
+{
+ int result;
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
+ if (i2400m->state == I2400M_SS_IDLE)
+ result = i2400m_net_wake_tx(i2400m, net_dev, skb);
+ else
+ result = i2400m_net_tx(i2400m, net_dev, skb);
+ if (result < 0)
+ net_dev->stats.tx_dropped++;
+ else {
+ net_dev->stats.tx_packets++;
+ net_dev->stats.tx_bytes += skb->len;
+ }
+ kfree_skb(skb);
+ result = NETDEV_TX_OK;
+ d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
+ return result;
+}
+
+
+static
+int i2400m_change_mtu(struct net_device *net_dev, int new_mtu)
+{
+ int result;
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct device *dev = i2400m_dev(i2400m);
+
+ if (new_mtu >= I2400M_MAX_MTU) {
+ dev_err(dev, "Cannot change MTU to %d (max is %d)\n",
+ new_mtu, I2400M_MAX_MTU);
+ result = -EINVAL;
+ } else {
+ net_dev->mtu = new_mtu;
+ result = 0;
+ }
+ return result;
+}
+
+
+static
+void i2400m_tx_timeout(struct net_device *net_dev)
+{
+ /*
+ * We might want to kick the device
+ *
+ * There is not much we can do though, as the device requires
+ * that we send the data aggregated. By the time we receive
+ * this, there might be data pending to be sent or not...
+ */
+ net_dev->stats.tx_errors++;
+ return;
+}
+
+
+/*
+ * Create a fake ethernet header
+ *
+ * For emulating an ethernet device, every received IP header has to
+ * be prefixed with an ethernet header.
+ *
+ * What we receive has (potentially) many IP packets concatenated with
+ * no ETH_HLEN bytes prefixed. Thus there is no space for an eth
+ * header.
+ *
+ * We would have to reallocate or do ugly fragment tricks in order to
+ * add it.
+ *
+ * But what we do is use the header space of the RX transaction
+ * (*msg_hdr) as we don't need it anymore; then we'll point all the
+ * data skbs there, as they share the same backing store.
+ *
+ * We only support IPv4 for v3 firmware.
+ */
+static
+void i2400m_rx_fake_eth_header(struct net_device *net_dev,
+ void *_eth_hdr)
+{
+ struct ethhdr *eth_hdr = _eth_hdr;
+
+ memcpy(eth_hdr->h_dest, net_dev->dev_addr, sizeof(eth_hdr->h_dest));
+ memset(eth_hdr->h_source, 0, sizeof(eth_hdr->h_dest));
+ eth_hdr->h_proto = __constant_cpu_to_be16(ETH_P_IP);
+}
+
+
+/*
+ * i2400m_net_rx - pass a network packet to the stack
+ *
+ * @i2400m: device instance
+ * @skb_rx: the skb where the buffer pointed to by @buf is
+ * @i: 1 if payload is the only one
+ * @buf: pointer to the buffer containing the data
+ * @len: buffer's length
+ *
+ * We just clone the skb and set it up so that it's skb->data pointer
+ * points to "buf" and it's length.
+ *
+ * Note that if the payload is the last (or the only one) in a
+ * multi-payload message, we don't clone the SKB but just reuse it.
+ *
+ * This function is normally run from a thread context. However, we
+ * still use netif_rx() instead of netif_receive_skb() as was
+ * recommended in the mailing list. Reason is in some stress tests
+ * when sending/receiving a lot of data we seem to hit a softlock in
+ * the kernel's TCP implementation [aroudn tcp_delay_timer()]. Using
+ * netif_rx() took care of the issue.
+ *
+ * This is, of course, still open to do more research on why running
+ * with netif_receive_skb() hits this softlock. FIXME.
+ *
+ * FIXME: currently we don't do any efforts at distinguishing if what
+ * we got was an IPv4 or IPv6 header, to setup the protocol field
+ * correctly.
+ */
+void i2400m_net_rx(struct i2400m *i2400m, struct sk_buff *skb_rx,
+ unsigned i, const void *buf, int buf_len)
+{
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *skb;
+
+ d_fnstart(2, dev, "(i2400m %p buf %p buf_len %d)\n",
+ i2400m, buf, buf_len);
+ if (i) {
+ skb = skb_get(skb_rx);
+ d_printf(2, dev, "RX: reusing first payload skb %p\n", skb);
+ skb_pull(skb, buf - (void *) skb->data);
+ skb_trim(skb, (void *) skb_end_pointer(skb) - buf);
+ } else {
+ /* Yes, this is bad -- a lot of overhead -- see
+ * comments at the top of the file */
+ skb = __netdev_alloc_skb(net_dev, buf_len, GFP_KERNEL);
+ if (skb == NULL) {
+ dev_err(dev, "NETRX: no memory to realloc skb\n");
+ net_dev->stats.rx_dropped++;
+ goto error_skb_realloc;
+ }
+ memcpy(skb_put(skb, buf_len), buf, buf_len);
+ }
+ i2400m_rx_fake_eth_header(i2400m->wimax_dev.net_dev,
+ skb->data - ETH_HLEN);
+ skb_set_mac_header(skb, -ETH_HLEN);
+ skb->dev = i2400m->wimax_dev.net_dev;
+ skb->protocol = htons(ETH_P_IP);
+ net_dev->stats.rx_packets++;
+ net_dev->stats.rx_bytes += buf_len;
+ d_printf(3, dev, "NETRX: receiving %d bytes to network stack\n",
+ buf_len);
+ d_dump(4, dev, buf, buf_len);
+ netif_rx_ni(skb); /* see notes in function header */
+error_skb_realloc:
+ d_fnend(2, dev, "(i2400m %p buf %p buf_len %d) = void\n",
+ i2400m, buf, buf_len);
+}
+
+
+/**
+ * i2400m_netdev_setup - Setup setup @net_dev's i2400m private data
+ *
+ * Called by alloc_netdev()
+ */
+void i2400m_netdev_setup(struct net_device *net_dev)
+{
+ d_fnstart(3, NULL, "(net_dev %p)\n", net_dev);
+ ether_setup(net_dev);
+ net_dev->mtu = I2400M_MAX_MTU;
+ net_dev->tx_queue_len = I2400M_TX_QLEN;
+ net_dev->features =
+ NETIF_F_VLAN_CHALLENGED
+ | NETIF_F_HIGHDMA;
+ net_dev->flags =
+ IFF_NOARP /* i2400m is apure IP device */
+ & (~IFF_BROADCAST /* i2400m is P2P */
+ & ~IFF_MULTICAST);
+ net_dev->watchdog_timeo = I2400M_TX_TIMEOUT;
+ net_dev->open = i2400m_open;
+ net_dev->stop = i2400m_stop;
+ net_dev->hard_start_xmit = i2400m_hard_start_xmit;
+ net_dev->change_mtu = i2400m_change_mtu;
+ net_dev->tx_timeout = i2400m_tx_timeout;
+ d_fnend(3, NULL, "(net_dev %p) = void\n", net_dev);
+}
+EXPORT_SYMBOL_GPL(i2400m_netdev_setup);
+
diff --git a/drivers/net/wimax/i2400m/op-rfkill.c b/drivers/net/wimax/i2400m/op-rfkill.c
new file mode 100644
index 000000000000..487ec58cea46
--- /dev/null
+++ b/drivers/net/wimax/i2400m/op-rfkill.c
@@ -0,0 +1,207 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Implement backend for the WiMAX stack rfkill support
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * The WiMAX kernel stack integrates into RF-Kill and keeps the
+ * switches's status. We just need to:
+ *
+ * - report changes in the HW RF Kill switch [with
+ * wimax_rfkill_{sw,hw}_report(), which happens when we detect those
+ * indications coming through hardware reports]. We also do it on
+ * initialization to let the stack know the intial HW state.
+ *
+ * - implement indications from the stack to change the SW RF Kill
+ * switch (coming from sysfs, the wimax stack or user space).
+ */
+#include "i2400m.h"
+#include <linux/wimax/i2400m.h>
+
+
+
+#define D_SUBMODULE rfkill
+#include "debug-levels.h"
+
+/*
+ * Return true if the i2400m radio is in the requested wimax_rf_state state
+ *
+ */
+static
+int i2400m_radio_is(struct i2400m *i2400m, enum wimax_rf_state state)
+{
+ if (state == WIMAX_RF_OFF)
+ return i2400m->state == I2400M_SS_RF_OFF
+ || i2400m->state == I2400M_SS_RF_SHUTDOWN;
+ else if (state == WIMAX_RF_ON)
+ /* state == WIMAX_RF_ON */
+ return i2400m->state != I2400M_SS_RF_OFF
+ && i2400m->state != I2400M_SS_RF_SHUTDOWN;
+ else
+ BUG();
+}
+
+
+/*
+ * WiMAX stack operation: implement SW RFKill toggling
+ *
+ * @wimax_dev: device descriptor
+ * @skb: skb where the message has been received; skb->data is
+ * expected to point to the message payload.
+ * @genl_info: passed by the generic netlink layer
+ *
+ * Generic Netlink will call this function when a message is sent from
+ * userspace to change the software RF-Kill switch status.
+ *
+ * This function will set the device's sofware RF-Kill switch state to
+ * match what is requested.
+ *
+ * NOTE: the i2400m has a strict state machine; we can only set the
+ * RF-Kill switch when it is on, the HW RF-Kill is on and the
+ * device is initialized. So we ignore errors steaming from not
+ * being in the right state (-EILSEQ).
+ */
+int i2400m_op_rfkill_sw_toggle(struct wimax_dev *wimax_dev,
+ enum wimax_rf_state state)
+{
+ int result;
+ struct i2400m *i2400m = wimax_dev_to_i2400m(wimax_dev);
+ struct device *dev = i2400m_dev(i2400m);
+ struct sk_buff *ack_skb;
+ struct {
+ struct i2400m_l3l4_hdr hdr;
+ struct i2400m_tlv_rf_operation sw_rf;
+ } __attribute__((packed)) *cmd;
+ char strerr[32];
+
+ d_fnstart(4, dev, "(wimax_dev %p state %d)\n", wimax_dev, state);
+
+ result = -ENOMEM;
+ cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
+ if (cmd == NULL)
+ goto error_alloc;
+ cmd->hdr.type = cpu_to_le16(I2400M_MT_CMD_RF_CONTROL);
+ cmd->hdr.length = sizeof(cmd->sw_rf);
+ cmd->hdr.version = cpu_to_le16(I2400M_L3L4_VERSION);
+ cmd->sw_rf.hdr.type = cpu_to_le16(I2400M_TLV_RF_OPERATION);
+ cmd->sw_rf.hdr.length = cpu_to_le16(sizeof(cmd->sw_rf.status));
+ switch (state) {
+ case WIMAX_RF_OFF: /* RFKILL ON, radio OFF */
+ cmd->sw_rf.status = cpu_to_le32(2);
+ break;
+ case WIMAX_RF_ON: /* RFKILL OFF, radio ON */
+ cmd->sw_rf.status = cpu_to_le32(1);
+ break;
+ default:
+ BUG();
+ }
+
+ ack_skb = i2400m_msg_to_dev(i2400m, cmd, sizeof(*cmd));
+ result = PTR_ERR(ack_skb);
+ if (IS_ERR(ack_skb)) {
+ dev_err(dev, "Failed to issue 'RF Control' command: %d\n",
+ result);
+ goto error_msg_to_dev;
+ }
+ result = i2400m_msg_check_status(wimax_msg_data(ack_skb),
+ strerr, sizeof(strerr));
+ if (result < 0) {
+ dev_err(dev, "'RF Control' (0x%04x) command failed: %d - %s\n",
+ I2400M_MT_CMD_RF_CONTROL, result, strerr);
+ goto error_cmd;
+ }
+
+ /* Now we wait for the state to change to RADIO_OFF or RADIO_ON */
+ result = wait_event_timeout(
+ i2400m->state_wq, i2400m_radio_is(i2400m, state),
+ 5 * HZ);
+ if (result == 0)
+ result = -ETIMEDOUT;
+ if (result < 0)
+ dev_err(dev, "Error waiting for device to toggle RF state: "
+ "%d\n", result);
+ result = 0;
+error_cmd:
+ kfree_skb(ack_skb);
+error_msg_to_dev:
+error_alloc:
+ d_fnend(4, dev, "(wimax_dev %p state %d) = %d\n",
+ wimax_dev, state, result);
+ return result;
+}
+
+
+/*
+ * Inform the WiMAX stack of changes in the RF Kill switches reported
+ * by the device
+ *
+ * @i2400m: device descriptor
+ * @rfss: TLV for RF Switches status; already validated
+ *
+ * NOTE: the reports on RF switch status cannot be trusted
+ * or used until the device is in a state of RADIO_OFF
+ * or greater.
+ */
+void i2400m_report_tlv_rf_switches_status(
+ struct i2400m *i2400m,
+ const struct i2400m_tlv_rf_switches_status *rfss)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ enum i2400m_rf_switch_status hw, sw;
+ enum wimax_st wimax_state;
+
+ sw = le32_to_cpu(rfss->sw_rf_switch);
+ hw = le32_to_cpu(rfss->hw_rf_switch);
+
+ d_fnstart(3, dev, "(i2400m %p rfss %p [hw %u sw %u])\n",
+ i2400m, rfss, hw, sw);
+ /* We only process rw switch evens when the device has been
+ * fully initialized */
+ wimax_state = wimax_state_get(&i2400m->wimax_dev);
+ if (wimax_state < WIMAX_ST_RADIO_OFF) {
+ d_printf(3, dev, "ignoring RF switches report, state %u\n",
+ wimax_state);
+ goto out;
+ }
+ switch (sw) {
+ case I2400M_RF_SWITCH_ON: /* RF Kill disabled (radio on) */
+ wimax_report_rfkill_sw(&i2400m->wimax_dev, WIMAX_RF_ON);
+ break;
+ case I2400M_RF_SWITCH_OFF: /* RF Kill enabled (radio off) */
+ wimax_report_rfkill_sw(&i2400m->wimax_dev, WIMAX_RF_OFF);
+ break;
+ default:
+ dev_err(dev, "HW BUG? Unknown RF SW state 0x%x\n", sw);
+ }
+
+ switch (hw) {
+ case I2400M_RF_SWITCH_ON: /* RF Kill disabled (radio on) */
+ wimax_report_rfkill_hw(&i2400m->wimax_dev, WIMAX_RF_ON);
+ break;
+ case I2400M_RF_SWITCH_OFF: /* RF Kill enabled (radio off) */
+ wimax_report_rfkill_hw(&i2400m->wimax_dev, WIMAX_RF_OFF);
+ break;
+ default:
+ dev_err(dev, "HW BUG? Unknown RF HW state 0x%x\n", hw);
+ }
+out:
+ d_fnend(3, dev, "(i2400m %p rfss %p [hw %u sw %u]) = void\n",
+ i2400m, rfss, hw, sw);
+}
diff --git a/drivers/net/wimax/i2400m/rx.c b/drivers/net/wimax/i2400m/rx.c
new file mode 100644
index 000000000000..6922022710ac
--- /dev/null
+++ b/drivers/net/wimax/i2400m/rx.c
@@ -0,0 +1,534 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Handle incoming traffic and deliver it to the control or data planes
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Use skb_clone(), break up processing in chunks
+ * - Split transport/device specific
+ * - Make buffer size dynamic to exert less memory pressure
+ *
+ *
+ * This handles the RX path.
+ *
+ * We receive an RX message from the bus-specific driver, which
+ * contains one or more payloads that have potentially different
+ * destinataries (data or control paths).
+ *
+ * So we just take that payload from the transport specific code in
+ * the form of an skb, break it up in chunks (a cloned skb each in the
+ * case of network packets) and pass it to netdev or to the
+ * command/ack handler (and from there to the WiMAX stack).
+ *
+ * PROTOCOL FORMAT
+ *
+ * The format of the buffer is:
+ *
+ * HEADER (struct i2400m_msg_hdr)
+ * PAYLOAD DESCRIPTOR 0 (struct i2400m_pld)
+ * PAYLOAD DESCRIPTOR 1
+ * ...
+ * PAYLOAD DESCRIPTOR N
+ * PAYLOAD 0 (raw bytes)
+ * PAYLOAD 1
+ * ...
+ * PAYLOAD N
+ *
+ * See tx.c for a deeper description on alignment requirements and
+ * other fun facts of it.
+ *
+ * ROADMAP
+ *
+ * i2400m_rx
+ * i2400m_rx_msg_hdr_check
+ * i2400m_rx_pl_descr_check
+ * i2400m_rx_payload
+ * i2400m_net_rx
+ * i2400m_rx_ctl
+ * i2400m_msg_size_check
+ * i2400m_report_hook_work [in a workqueue]
+ * i2400m_report_hook
+ * wimax_msg_to_user
+ * i2400m_rx_ctl_ack
+ * wimax_msg_to_user_alloc
+ * i2400m_rx_trace
+ * i2400m_msg_size_check
+ * wimax_msg
+ */
+#include <linux/kernel.h>
+#include <linux/if_arp.h>
+#include <linux/netdevice.h>
+#include <linux/workqueue.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE rx
+#include "debug-levels.h"
+
+struct i2400m_report_hook_args {
+ struct sk_buff *skb_rx;
+ const struct i2400m_l3l4_hdr *l3l4_hdr;
+ size_t size;
+};
+
+
+/*
+ * Execute i2400m_report_hook in a workqueue
+ *
+ * Unpacks arguments from the deferred call, executes it and then
+ * drops the references.
+ *
+ * Obvious NOTE: References are needed because we are a separate
+ * thread; otherwise the buffer changes under us because it is
+ * released by the original caller.
+ */
+static
+void i2400m_report_hook_work(struct work_struct *ws)
+{
+ struct i2400m_work *iw =
+ container_of(ws, struct i2400m_work, ws);
+ struct i2400m_report_hook_args *args = (void *) iw->pl;
+ i2400m_report_hook(iw->i2400m, args->l3l4_hdr, args->size);
+ kfree_skb(args->skb_rx);
+ i2400m_put(iw->i2400m);
+ kfree(iw);
+}
+
+
+/*
+ * Process an ack to a command
+ *
+ * @i2400m: device descriptor
+ * @payload: pointer to message
+ * @size: size of the message
+ *
+ * Pass the acknodledgment (in an skb) to the thread that is waiting
+ * for it in i2400m->msg_completion.
+ *
+ * We need to coordinate properly with the thread waiting for the
+ * ack. Check if it is waiting or if it is gone. We loose the spinlock
+ * to avoid allocating on atomic contexts (yeah, could use GFP_ATOMIC,
+ * but this is not so speed critical).
+ */
+static
+void i2400m_rx_ctl_ack(struct i2400m *i2400m,
+ const void *payload, size_t size)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ unsigned long flags;
+ struct sk_buff *ack_skb;
+
+ /* Anyone waiting for an answer? */
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ if (i2400m->ack_skb != ERR_PTR(-EINPROGRESS)) {
+ dev_err(dev, "Huh? reply to command with no waiters\n");
+ goto error_no_waiter;
+ }
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+
+ ack_skb = wimax_msg_alloc(wimax_dev, NULL, payload, size, GFP_KERNEL);
+
+ /* Check waiter didn't time out waiting for the answer... */
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ if (i2400m->ack_skb != ERR_PTR(-EINPROGRESS)) {
+ d_printf(1, dev, "Huh? waiter for command reply cancelled\n");
+ goto error_waiter_cancelled;
+ }
+ if (ack_skb == NULL) {
+ dev_err(dev, "CMD/GET/SET ack: cannot allocate SKB\n");
+ i2400m->ack_skb = ERR_PTR(-ENOMEM);
+ } else
+ i2400m->ack_skb = ack_skb;
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ complete(&i2400m->msg_completion);
+ return;
+
+error_waiter_cancelled:
+ if (ack_skb)
+ kfree_skb(ack_skb);
+error_no_waiter:
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+ return;
+}
+
+
+/*
+ * Receive and process a control payload
+ *
+ * @i2400m: device descriptor
+ * @skb_rx: skb that contains the payload (for reference counting)
+ * @payload: pointer to message
+ * @size: size of the message
+ *
+ * There are two types of control RX messages: reports (asynchronous,
+ * like your every day interrupts) and 'acks' (reponses to a command,
+ * get or set request).
+ *
+ * If it is a report, we run hooks on it (to extract information for
+ * things we need to do in the driver) and then pass it over to the
+ * WiMAX stack to send it to user space.
+ *
+ * NOTE: report processing is done in a workqueue specific to the
+ * generic driver, to avoid deadlocks in the system.
+ *
+ * If it is not a report, it is an ack to a previously executed
+ * command, set or get, so wake up whoever is waiting for it from
+ * i2400m_msg_to_dev(). i2400m_rx_ctl_ack() takes care of that.
+ *
+ * Note that the sizes we pass to other functions from here are the
+ * sizes of the _l3l4_hdr + payload, not full buffer sizes, as we have
+ * verified in _msg_size_check() that they are congruent.
+ *
+ * For reports: We can't clone the original skb where the data is
+ * because we need to send this up via netlink; netlink has to add
+ * headers and we can't overwrite what's preceeding the payload...as
+ * it is another message. So we just dup them.
+ */
+static
+void i2400m_rx_ctl(struct i2400m *i2400m, struct sk_buff *skb_rx,
+ const void *payload, size_t size)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_l3l4_hdr *l3l4_hdr = payload;
+ unsigned msg_type;
+
+ result = i2400m_msg_size_check(i2400m, l3l4_hdr, size);
+ if (result < 0) {
+ dev_err(dev, "HW BUG? device sent a bad message: %d\n",
+ result);
+ goto error_check;
+ }
+ msg_type = le16_to_cpu(l3l4_hdr->type);
+ d_printf(1, dev, "%s 0x%04x: %zu bytes\n",
+ msg_type & I2400M_MT_REPORT_MASK ? "REPORT" : "CMD/SET/GET",
+ msg_type, size);
+ d_dump(2, dev, l3l4_hdr, size);
+ if (msg_type & I2400M_MT_REPORT_MASK) {
+ /* These hooks have to be ran serialized; as well, the
+ * handling might force the execution of commands, and
+ * that might cause reentrancy issues with
+ * bus-specific subdrivers and workqueues. So we run
+ * it in a separate workqueue. */
+ struct i2400m_report_hook_args args = {
+ .skb_rx = skb_rx,
+ .l3l4_hdr = l3l4_hdr,
+ .size = size
+ };
+ if (unlikely(i2400m->ready == 0)) /* only send if up */
+ return;
+ skb_get(skb_rx);
+ i2400m_queue_work(i2400m, i2400m_report_hook_work,
+ GFP_KERNEL, &args, sizeof(args));
+ result = wimax_msg(&i2400m->wimax_dev, NULL, l3l4_hdr, size,
+ GFP_KERNEL);
+ if (result < 0)
+ dev_err(dev, "error sending report to userspace: %d\n",
+ result);
+ } else /* an ack to a CMD, GET or SET */
+ i2400m_rx_ctl_ack(i2400m, payload, size);
+error_check:
+ return;
+}
+
+
+
+
+/*
+ * Receive and send up a trace
+ *
+ * @i2400m: device descriptor
+ * @skb_rx: skb that contains the trace (for reference counting)
+ * @payload: pointer to trace message inside the skb
+ * @size: size of the message
+ *
+ * THe i2400m might produce trace information (diagnostics) and we
+ * send them through a different kernel-to-user pipe (to avoid
+ * clogging it).
+ *
+ * As in i2400m_rx_ctl(), we can't clone the original skb where the
+ * data is because we need to send this up via netlink; netlink has to
+ * add headers and we can't overwrite what's preceeding the
+ * payload...as it is another message. So we just dup them.
+ */
+static
+void i2400m_rx_trace(struct i2400m *i2400m,
+ const void *payload, size_t size)
+{
+ int result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+ const struct i2400m_l3l4_hdr *l3l4_hdr = payload;
+ unsigned msg_type;
+
+ result = i2400m_msg_size_check(i2400m, l3l4_hdr, size);
+ if (result < 0) {
+ dev_err(dev, "HW BUG? device sent a bad trace message: %d\n",
+ result);
+ goto error_check;
+ }
+ msg_type = le16_to_cpu(l3l4_hdr->type);
+ d_printf(1, dev, "Trace %s 0x%04x: %zu bytes\n",
+ msg_type & I2400M_MT_REPORT_MASK ? "REPORT" : "CMD/SET/GET",
+ msg_type, size);
+ d_dump(2, dev, l3l4_hdr, size);
+ if (unlikely(i2400m->ready == 0)) /* only send if up */
+ return;
+ result = wimax_msg(wimax_dev, "trace", l3l4_hdr, size, GFP_KERNEL);
+ if (result < 0)
+ dev_err(dev, "error sending trace to userspace: %d\n",
+ result);
+error_check:
+ return;
+}
+
+
+/*
+ * Act on a received payload
+ *
+ * @i2400m: device instance
+ * @skb_rx: skb where the transaction was received
+ * @single: 1 if there is only one payload, 0 otherwise
+ * @pld: payload descriptor
+ * @payload: payload data
+ *
+ * Upon reception of a payload, look at its guts in the payload
+ * descriptor and decide what to do with it.
+ */
+static
+void i2400m_rx_payload(struct i2400m *i2400m, struct sk_buff *skb_rx,
+ unsigned single, const struct i2400m_pld *pld,
+ const void *payload)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ size_t pl_size = i2400m_pld_size(pld);
+ enum i2400m_pt pl_type = i2400m_pld_type(pld);
+
+ switch (pl_type) {
+ case I2400M_PT_DATA:
+ d_printf(3, dev, "RX: data payload %zu bytes\n", pl_size);
+ i2400m_net_rx(i2400m, skb_rx, single, payload, pl_size);
+ break;
+ case I2400M_PT_CTRL:
+ i2400m_rx_ctl(i2400m, skb_rx, payload, pl_size);
+ break;
+ case I2400M_PT_TRACE:
+ i2400m_rx_trace(i2400m, payload, pl_size);
+ break;
+ default: /* Anything else shouldn't come to the host */
+ if (printk_ratelimit())
+ dev_err(dev, "RX: HW BUG? unexpected payload type %u\n",
+ pl_type);
+ }
+}
+
+
+/*
+ * Check a received transaction's message header
+ *
+ * @i2400m: device descriptor
+ * @msg_hdr: message header
+ * @buf_size: size of the received buffer
+ *
+ * Check that the declarations done by a RX buffer message header are
+ * sane and consistent with the amount of data that was received.
+ */
+static
+int i2400m_rx_msg_hdr_check(struct i2400m *i2400m,
+ const struct i2400m_msg_hdr *msg_hdr,
+ size_t buf_size)
+{
+ int result = -EIO;
+ struct device *dev = i2400m_dev(i2400m);
+ if (buf_size < sizeof(*msg_hdr)) {
+ dev_err(dev, "RX: HW BUG? message with short header (%zu "
+ "vs %zu bytes expected)\n", buf_size, sizeof(*msg_hdr));
+ goto error;
+ }
+ if (msg_hdr->barker != cpu_to_le32(I2400M_D2H_MSG_BARKER)) {
+ dev_err(dev, "RX: HW BUG? message received with unknown "
+ "barker 0x%08x (buf_size %zu bytes)\n",
+ le32_to_cpu(msg_hdr->barker), buf_size);
+ goto error;
+ }
+ if (msg_hdr->num_pls == 0) {
+ dev_err(dev, "RX: HW BUG? zero payload packets in message\n");
+ goto error;
+ }
+ if (le16_to_cpu(msg_hdr->num_pls) > I2400M_MAX_PLS_IN_MSG) {
+ dev_err(dev, "RX: HW BUG? message contains more payload "
+ "than maximum; ignoring.\n");
+ goto error;
+ }
+ result = 0;
+error:
+ return result;
+}
+
+
+/*
+ * Check a payload descriptor against the received data
+ *
+ * @i2400m: device descriptor
+ * @pld: payload descriptor
+ * @pl_itr: offset (in bytes) in the received buffer the payload is
+ * located
+ * @buf_size: size of the received buffer
+ *
+ * Given a payload descriptor (part of a RX buffer), check it is sane
+ * and that the data it declares fits in the buffer.
+ */
+static
+int i2400m_rx_pl_descr_check(struct i2400m *i2400m,
+ const struct i2400m_pld *pld,
+ size_t pl_itr, size_t buf_size)
+{
+ int result = -EIO;
+ struct device *dev = i2400m_dev(i2400m);
+ size_t pl_size = i2400m_pld_size(pld);
+ enum i2400m_pt pl_type = i2400m_pld_type(pld);
+
+ if (pl_size > i2400m->bus_pl_size_max) {
+ dev_err(dev, "RX: HW BUG? payload @%zu: size %zu is "
+ "bigger than maximum %zu; ignoring message\n",
+ pl_itr, pl_size, i2400m->bus_pl_size_max);
+ goto error;
+ }
+ if (pl_itr + pl_size > buf_size) { /* enough? */
+ dev_err(dev, "RX: HW BUG? payload @%zu: size %zu "
+ "goes beyond the received buffer "
+ "size (%zu bytes); ignoring message\n",
+ pl_itr, pl_size, buf_size);
+ goto error;
+ }
+ if (pl_type >= I2400M_PT_ILLEGAL) {
+ dev_err(dev, "RX: HW BUG? illegal payload type %u; "
+ "ignoring message\n", pl_type);
+ goto error;
+ }
+ result = 0;
+error:
+ return result;
+}
+
+
+/**
+ * i2400m_rx - Receive a buffer of data from the device
+ *
+ * @i2400m: device descriptor
+ * @skb: skbuff where the data has been received
+ *
+ * Parse in a buffer of data that contains an RX message sent from the
+ * device. See the file header for the format. Run all checks on the
+ * buffer header, then run over each payload's descriptors, verify
+ * their consistency and act on each payload's contents. If
+ * everything is succesful, update the device's statistics.
+ *
+ * Note: You need to set the skb to contain only the length of the
+ * received buffer; for that, use skb_trim(skb, RECEIVED_SIZE).
+ *
+ * Returns:
+ *
+ * 0 if ok, < 0 errno on error
+ *
+ * If ok, this function owns now the skb and the caller DOESN'T have
+ * to run kfree_skb() on it. However, on error, the caller still owns
+ * the skb and it is responsible for releasing it.
+ */
+int i2400m_rx(struct i2400m *i2400m, struct sk_buff *skb)
+{
+ int i, result;
+ struct device *dev = i2400m_dev(i2400m);
+ const struct i2400m_msg_hdr *msg_hdr;
+ size_t pl_itr, pl_size, skb_len;
+ unsigned long flags;
+ unsigned num_pls;
+
+ skb_len = skb->len;
+ d_fnstart(4, dev, "(i2400m %p skb %p [size %zu])\n",
+ i2400m, skb, skb_len);
+ result = -EIO;
+ msg_hdr = (void *) skb->data;
+ result = i2400m_rx_msg_hdr_check(i2400m, msg_hdr, skb->len);
+ if (result < 0)
+ goto error_msg_hdr_check;
+ result = -EIO;
+ num_pls = le16_to_cpu(msg_hdr->num_pls);
+ pl_itr = sizeof(*msg_hdr) + /* Check payload descriptor(s) */
+ num_pls * sizeof(msg_hdr->pld[0]);
+ pl_itr = ALIGN(pl_itr, I2400M_PL_PAD);
+ if (pl_itr > skb->len) { /* got all the payload descriptors? */
+ dev_err(dev, "RX: HW BUG? message too short (%u bytes) for "
+ "%u payload descriptors (%zu each, total %zu)\n",
+ skb->len, num_pls, sizeof(msg_hdr->pld[0]), pl_itr);
+ goto error_pl_descr_short;
+ }
+ /* Walk each payload payload--check we really got it */
+ for (i = 0; i < num_pls; i++) {
+ /* work around old gcc warnings */
+ pl_size = i2400m_pld_size(&msg_hdr->pld[i]);
+ result = i2400m_rx_pl_descr_check(i2400m, &msg_hdr->pld[i],
+ pl_itr, skb->len);
+ if (result < 0)
+ goto error_pl_descr_check;
+ i2400m_rx_payload(i2400m, skb, num_pls == 1, &msg_hdr->pld[i],
+ skb->data + pl_itr);
+ pl_itr += ALIGN(pl_size, I2400M_PL_PAD);
+ cond_resched(); /* Don't monopolize */
+ }
+ kfree_skb(skb);
+ /* Update device statistics */
+ spin_lock_irqsave(&i2400m->rx_lock, flags);
+ i2400m->rx_pl_num += i;
+ if (i > i2400m->rx_pl_max)
+ i2400m->rx_pl_max = i;
+ if (i < i2400m->rx_pl_min)
+ i2400m->rx_pl_min = i;
+ i2400m->rx_num++;
+ i2400m->rx_size_acc += skb->len;
+ if (skb->len < i2400m->rx_size_min)
+ i2400m->rx_size_min = skb->len;
+ if (skb->len > i2400m->rx_size_max)
+ i2400m->rx_size_max = skb->len;
+ spin_unlock_irqrestore(&i2400m->rx_lock, flags);
+error_pl_descr_check:
+error_pl_descr_short:
+error_msg_hdr_check:
+ d_fnend(4, dev, "(i2400m %p skb %p [size %zu]) = %d\n",
+ i2400m, skb, skb_len, result);
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_rx);
diff --git a/drivers/net/wimax/i2400m/sdio-debug-levels.h b/drivers/net/wimax/i2400m/sdio-debug-levels.h
new file mode 100644
index 000000000000..c51998741301
--- /dev/null
+++ b/drivers/net/wimax/i2400m/sdio-debug-levels.h
@@ -0,0 +1,22 @@
+/*
+ * debug levels control file for the i2400m module's
+ */
+#ifndef __debug_levels__h__
+#define __debug_levels__h__
+
+/* Maximum compile and run time debug level for all submodules */
+#define D_MODULENAME i2400m_sdio
+#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
+
+#include <linux/wimax/debug.h>
+
+/* List of all the enabled modules */
+enum d_module {
+ D_SUBMODULE_DECLARE(main),
+ D_SUBMODULE_DECLARE(tx),
+ D_SUBMODULE_DECLARE(rx),
+ D_SUBMODULE_DECLARE(fw)
+};
+
+
+#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/net/wimax/i2400m/sdio-fw.c b/drivers/net/wimax/i2400m/sdio-fw.c
new file mode 100644
index 000000000000..3487205d8f50
--- /dev/null
+++ b/drivers/net/wimax/i2400m/sdio-fw.c
@@ -0,0 +1,224 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Firmware uploader's SDIO specifics
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Initial implementation
+ *
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Bus generic/specific split for USB
+ *
+ * Dirk Brandewie <dirk.j.brandewie@intel.com>
+ * - Initial implementation for SDIO
+ *
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - SDIO rehash for changes in the bus-driver model
+ *
+ * THE PROCEDURE
+ *
+ * See fw.c for the generic description of this procedure.
+ *
+ * This file implements only the SDIO specifics. It boils down to how
+ * to send a command and waiting for an acknowledgement from the
+ * device. We do polled reads.
+ *
+ * COMMAND EXECUTION
+ *
+ * THe generic firmware upload code will call i2400m_bus_bm_cmd_send()
+ * to send commands.
+ *
+ * The SDIO devices expects things in 256 byte blocks, so it will pad
+ * it, compute the checksum (if needed) and pass it to SDIO.
+ *
+ * ACK RECEPTION
+ *
+ * This works in polling mode -- the fw loader says when to wait for
+ * data and for that it calls i2400ms_bus_bm_wait_for_ack().
+ *
+ * This will poll the device for data until it is received. We need to
+ * receive at least as much bytes as where asked for (although it'll
+ * always be a multiple of 256 bytes).
+ */
+#include <linux/mmc/sdio_func.h>
+#include "i2400m-sdio.h"
+
+
+#define D_SUBMODULE fw
+#include "sdio-debug-levels.h"
+
+/*
+ * Send a boot-mode command to the SDIO function
+ *
+ * We use a bounce buffer (i2400m->bm_cmd_buf) because we need to
+ * touch the header if the RAW flag is not set.
+ *
+ * @flags: pass thru from i2400m_bm_cmd()
+ * @return: cmd_size if ok, < 0 errno code on error.
+ *
+ * Note the command is padded to the SDIO block size for the device.
+ */
+ssize_t i2400ms_bus_bm_cmd_send(struct i2400m *i2400m,
+ const struct i2400m_bootrom_header *_cmd,
+ size_t cmd_size, int flags)
+{
+ ssize_t result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
+ struct i2400m_bootrom_header *cmd;
+ /* SDIO restriction */
+ size_t cmd_size_a = ALIGN(cmd_size, I2400MS_BLK_SIZE);
+
+ d_fnstart(5, dev, "(i2400m %p cmd %p size %zu)\n",
+ i2400m, _cmd, cmd_size);
+ result = -E2BIG;
+ if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
+ goto error_too_big;
+
+ memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size); /* Prep command */
+ cmd = i2400m->bm_cmd_buf;
+ if (cmd_size_a > cmd_size) /* Zero pad space */
+ memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
+ if ((flags & I2400M_BM_CMD_RAW) == 0) {
+ if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
+ dev_warn(dev, "SW BUG: response_required == 0\n");
+ i2400m_bm_cmd_prepare(cmd);
+ }
+ d_printf(4, dev, "BM cmd %d: %zu bytes (%zu padded)\n",
+ opcode, cmd_size, cmd_size_a);
+ d_dump(5, dev, cmd, cmd_size);
+
+ sdio_claim_host(i2400ms->func); /* Send & check */
+ result = sdio_memcpy_toio(i2400ms->func, I2400MS_DATA_ADDR,
+ i2400m->bm_cmd_buf, cmd_size_a);
+ sdio_release_host(i2400ms->func);
+ if (result < 0) {
+ dev_err(dev, "BM cmd %d: cannot send: %ld\n",
+ opcode, (long) result);
+ goto error_cmd_send;
+ }
+ result = cmd_size;
+error_cmd_send:
+error_too_big:
+ d_fnend(5, dev, "(i2400m %p cmd %p size %zu) = %d\n",
+ i2400m, _cmd, cmd_size, (int) result);
+ return result;
+}
+
+
+/*
+ * Read an ack from the device's boot-mode (polling)
+ *
+ * @i2400m:
+ * @_ack: pointer to where to store the read data
+ * @ack_size: how many bytes we should read
+ *
+ * Returns: < 0 errno code on error; otherwise, amount of received bytes.
+ *
+ * The ACK for a BM command is always at least sizeof(*ack) bytes, so
+ * check for that. We don't need to check for device reboots
+ *
+ * NOTE: We do an artificial timeout of 1 sec over the SDIO timeout;
+ * this way we have control over it...there is no way that I know
+ * of setting an SDIO transaction timeout.
+ */
+ssize_t i2400ms_bus_bm_wait_for_ack(struct i2400m *i2400m,
+ struct i2400m_bootrom_header *ack,
+ size_t ack_size)
+{
+ int result;
+ ssize_t rx_size;
+ u64 timeout;
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+
+ BUG_ON(sizeof(*ack) > ack_size);
+
+ d_fnstart(5, dev, "(i2400m %p ack %p size %zu)\n",
+ i2400m, ack, ack_size);
+
+ timeout = get_jiffies_64() + 2 * HZ;
+ sdio_claim_host(func);
+ while (1) {
+ if (time_after64(get_jiffies_64(), timeout)) {
+ rx_size = -ETIMEDOUT;
+ dev_err(dev, "timeout waiting for ack data\n");
+ goto error_timedout;
+ }
+
+ /* Find the RX size, check if it fits or not -- it if
+ * doesn't fit, fail, as we have no way to dispose of
+ * the extra data. */
+ rx_size = __i2400ms_rx_get_size(i2400ms);
+ if (rx_size < 0)
+ goto error_rx_get_size;
+ result = -ENOSPC; /* Check it fits */
+ if (rx_size < sizeof(*ack)) {
+ rx_size = -EIO;
+ dev_err(dev, "HW BUG? received is too small (%zu vs "
+ "%zu needed)\n", sizeof(*ack), rx_size);
+ goto error_too_small;
+ }
+ if (rx_size > I2400M_BM_ACK_BUF_SIZE) {
+ dev_err(dev, "SW BUG? BM_ACK_BUF is too small (%u vs "
+ "%zu needed)\n", I2400M_BM_ACK_BUF_SIZE,
+ rx_size);
+ goto error_too_small;
+ }
+
+ /* Read it */
+ result = sdio_memcpy_fromio(func, i2400m->bm_ack_buf,
+ I2400MS_DATA_ADDR, rx_size);
+ if (result == -ETIMEDOUT || result == -ETIME)
+ continue;
+ if (result < 0) {
+ dev_err(dev, "BM SDIO receive (%zu B) failed: %d\n",
+ rx_size, result);
+ goto error_read;
+ } else
+ break;
+ }
+ rx_size = min((ssize_t)ack_size, rx_size);
+ memcpy(ack, i2400m->bm_ack_buf, rx_size);
+error_read:
+error_too_small:
+error_rx_get_size:
+error_timedout:
+ sdio_release_host(func);
+ d_fnend(5, dev, "(i2400m %p ack %p size %zu) = %ld\n",
+ i2400m, ack, ack_size, (long) rx_size);
+ return rx_size;
+}
diff --git a/drivers/net/wimax/i2400m/sdio-rx.c b/drivers/net/wimax/i2400m/sdio-rx.c
new file mode 100644
index 000000000000..a3008b904f7d
--- /dev/null
+++ b/drivers/net/wimax/i2400m/sdio-rx.c
@@ -0,0 +1,255 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * SDIO RX handling
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Dirk Brandewie <dirk.j.brandewie@intel.com>
+ * - Initial implementation
+ *
+ *
+ * This handles the RX path on SDIO.
+ *
+ * The SDIO bus driver calls the "irq" routine when data is available.
+ * This is not a traditional interrupt routine since the SDIO bus
+ * driver calls us from its irq thread context. Because of this
+ * sleeping in the SDIO RX IRQ routine is okay.
+ *
+ * From there on, we obtain the size of the data that is available,
+ * allocate an skb, copy it and then pass it to the generic driver's
+ * RX routine [i2400m_rx()].
+ *
+ * ROADMAP
+ *
+ * i2400ms_irq()
+ * i2400ms_rx()
+ * __i2400ms_rx_get_size()
+ * i2400m_rx()
+ *
+ * i2400ms_rx_setup()
+ *
+ * i2400ms_rx_release()
+ */
+#include <linux/workqueue.h>
+#include <linux/wait.h>
+#include <linux/skbuff.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+#include "i2400m-sdio.h"
+
+#define D_SUBMODULE rx
+#include "sdio-debug-levels.h"
+
+
+/*
+ * Read and return the amount of bytes available for RX
+ *
+ * The RX size has to be read like this: byte reads of three
+ * sequential locations; then glue'em together.
+ *
+ * sdio_readl() doesn't work.
+ */
+ssize_t __i2400ms_rx_get_size(struct i2400ms *i2400ms)
+{
+ int ret, cnt, val;
+ ssize_t rx_size;
+ unsigned xfer_size_addr;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &i2400ms->func->dev;
+
+ d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
+ xfer_size_addr = I2400MS_INTR_GET_SIZE_ADDR;
+ rx_size = 0;
+ for (cnt = 0; cnt < 3; cnt++) {
+ val = sdio_readb(func, xfer_size_addr + cnt, &ret);
+ if (ret < 0) {
+ dev_err(dev, "RX: Can't read byte %d of RX size from "
+ "0x%08x: %d\n", cnt, xfer_size_addr + cnt, ret);
+ rx_size = ret;
+ goto error_read;
+ }
+ rx_size = rx_size << 8 | (val & 0xff);
+ }
+ d_printf(6, dev, "RX: rx_size is %ld\n", (long) rx_size);
+error_read:
+ d_fnend(7, dev, "(i2400ms %p) = %ld\n", i2400ms, (long) rx_size);
+ return rx_size;
+}
+
+
+/*
+ * Read data from the device (when in normal)
+ *
+ * Allocate an SKB of the right size, read the data in and then
+ * deliver it to the generic layer.
+ *
+ * We also check for a reboot barker. That means the device died and
+ * we have to reboot it.
+ */
+static
+void i2400ms_rx(struct i2400ms *i2400ms)
+{
+ int ret;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+ struct i2400m *i2400m = &i2400ms->i2400m;
+ struct sk_buff *skb;
+ ssize_t rx_size;
+
+ d_fnstart(7, dev, "(i2400ms %p)\n", i2400ms);
+ rx_size = __i2400ms_rx_get_size(i2400ms);
+ if (rx_size < 0) {
+ ret = rx_size;
+ goto error_get_size;
+ }
+ ret = -ENOMEM;
+ skb = alloc_skb(rx_size, GFP_ATOMIC);
+ if (NULL == skb) {
+ dev_err(dev, "RX: unable to alloc skb\n");
+ goto error_alloc_skb;
+ }
+
+ ret = sdio_memcpy_fromio(func, skb->data,
+ I2400MS_DATA_ADDR, rx_size);
+ if (ret < 0) {
+ dev_err(dev, "RX: SDIO data read failed: %d\n", ret);
+ goto error_memcpy_fromio;
+ }
+ /* Check if device has reset */
+ if (!memcmp(skb->data, i2400m_NBOOT_BARKER,
+ sizeof(i2400m_NBOOT_BARKER))
+ || !memcmp(skb->data, i2400m_SBOOT_BARKER,
+ sizeof(i2400m_SBOOT_BARKER))) {
+ ret = i2400m_dev_reset_handle(i2400m);
+ kfree_skb(skb);
+ } else {
+ skb_put(skb, rx_size);
+ i2400m_rx(i2400m, skb);
+ }
+ d_fnend(7, dev, "(i2400ms %p) = void\n", i2400ms);
+ return;
+
+error_memcpy_fromio:
+ kfree_skb(skb);
+error_alloc_skb:
+error_get_size:
+ d_fnend(7, dev, "(i2400ms %p) = %d\n", i2400ms, ret);
+ return;
+}
+
+
+/*
+ * Process an interrupt from the SDIO card
+ *
+ * FIXME: need to process other events that are not just ready-to-read
+ *
+ * Checks there is data ready and then proceeds to read it.
+ */
+static
+void i2400ms_irq(struct sdio_func *func)
+{
+ int ret;
+ struct i2400ms *i2400ms = sdio_get_drvdata(func);
+ struct i2400m *i2400m = &i2400ms->i2400m;
+ struct device *dev = &func->dev;
+ int val;
+
+ d_fnstart(6, dev, "(i2400ms %p)\n", i2400ms);
+ val = sdio_readb(func, I2400MS_INTR_STATUS_ADDR, &ret);
+ if (ret < 0) {
+ dev_err(dev, "RX: Can't read interrupt status: %d\n", ret);
+ goto error_no_irq;
+ }
+ if (!val) {
+ dev_err(dev, "RX: BUG? got IRQ but no interrupt ready?\n");
+ goto error_no_irq;
+ }
+ sdio_writeb(func, 1, I2400MS_INTR_CLEAR_ADDR, &ret);
+ if (WARN_ON(i2400m->boot_mode != 0))
+ dev_err(dev, "RX: SW BUG? boot mode and IRQ is up?\n");
+ else
+ i2400ms_rx(i2400ms);
+error_no_irq:
+ d_fnend(6, dev, "(i2400ms %p) = void\n", i2400ms);
+ return;
+}
+
+
+/*
+ * Setup SDIO RX
+ *
+ * Hooks up the IRQ handler and then enables IRQs.
+ */
+int i2400ms_rx_setup(struct i2400ms *i2400ms)
+{
+ int result;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+
+ d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
+ sdio_claim_host(func);
+ result = sdio_claim_irq(func, i2400ms_irq);
+ if (result < 0) {
+ dev_err(dev, "Cannot claim IRQ: %d\n", result);
+ goto error_irq_claim;
+ }
+ result = 0;
+ sdio_writeb(func, 1, I2400MS_INTR_ENABLE_ADDR, &result);
+ if (result < 0) {
+ sdio_release_irq(func);
+ dev_err(dev, "Failed to enable interrupts %d\n", result);
+ }
+error_irq_claim:
+ sdio_release_host(func);
+ d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
+ return result;
+}
+
+
+/*
+ * Tear down SDIO RX
+ *
+ * Disables IRQs in the device and removes the IRQ handler.
+ */
+void i2400ms_rx_release(struct i2400ms *i2400ms)
+{
+ int result;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+
+ d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
+ sdio_claim_host(func);
+ sdio_writeb(func, 0, I2400MS_INTR_ENABLE_ADDR, &result);
+ sdio_release_irq(func);
+ sdio_release_host(func);
+ d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
+}
diff --git a/drivers/net/wimax/i2400m/sdio-tx.c b/drivers/net/wimax/i2400m/sdio-tx.c
new file mode 100644
index 000000000000..5105a5ebc44f
--- /dev/null
+++ b/drivers/net/wimax/i2400m/sdio-tx.c
@@ -0,0 +1,153 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * SDIO TX transaction backends
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Dirk Brandewie <dirk.j.brandewie@intel.com>
+ * - Initial implementation
+ *
+ *
+ * Takes the TX messages in the i2400m's driver TX FIFO and sends them
+ * to the device until there are no more.
+ *
+ * If we fail sending the message, we just drop it. There isn't much
+ * we can do at this point. Most of the traffic is network, which has
+ * recovery methods for dropped packets.
+ *
+ * The SDIO functions are not atomic, so we can't run from the context
+ * where i2400m->bus_tx_kick() [i2400ms_bus_tx_kick()] is being called
+ * (some times atomic). Thus, the actual TX work is deferred to a
+ * workqueue.
+ *
+ * ROADMAP
+ *
+ * i2400ms_bus_tx_kick()
+ * i2400ms_tx_submit() [through workqueue]
+ *
+ * i2400m_tx_setup()
+ *
+ * i2400m_tx_release()
+ */
+#include <linux/mmc/sdio_func.h>
+#include "i2400m-sdio.h"
+
+#define D_SUBMODULE tx
+#include "sdio-debug-levels.h"
+
+
+/*
+ * Pull TX transations from the TX FIFO and send them to the device
+ * until there are no more.
+ */
+static
+void i2400ms_tx_submit(struct work_struct *ws)
+{
+ int result;
+ struct i2400ms *i2400ms = container_of(ws, struct i2400ms, tx_worker);
+ struct i2400m *i2400m = &i2400ms->i2400m;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+ struct i2400m_msg_hdr *tx_msg;
+ size_t tx_msg_size;
+
+ d_fnstart(4, dev, "(i2400ms %p, i2400m %p)\n", i2400ms, i2400ms);
+
+ while (NULL != (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size))) {
+ d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
+ d_dump(5, dev, tx_msg, tx_msg_size);
+
+ sdio_claim_host(func);
+ result = sdio_memcpy_toio(func, 0, tx_msg, tx_msg_size);
+ sdio_release_host(func);
+
+ i2400m_tx_msg_sent(i2400m);
+
+ if (result < 0) {
+ dev_err(dev, "TX: cannot submit TX; tx_msg @%zu %zu B:"
+ " %d\n", (void *) tx_msg - i2400m->tx_buf,
+ tx_msg_size, result);
+ }
+
+ d_printf(2, dev, "TX: %zub submitted\n", tx_msg_size);
+ }
+
+ d_fnend(4, dev, "(i2400ms %p) = void\n", i2400ms);
+}
+
+
+/*
+ * The generic driver notifies us that there is data ready for TX
+ *
+ * Schedule a run of i2400ms_tx_submit() to handle it.
+ */
+void i2400ms_bus_tx_kick(struct i2400m *i2400m)
+{
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ struct device *dev = &i2400ms->func->dev;
+
+ d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
+
+ /* schedule tx work, this is because tx may block, therefore
+ * it has to run in a thread context.
+ */
+ queue_work(i2400ms->tx_workqueue, &i2400ms->tx_worker);
+
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+
+int i2400ms_tx_setup(struct i2400ms *i2400ms)
+{
+ int result;
+ struct device *dev = &i2400ms->func->dev;
+ struct i2400m *i2400m = &i2400ms->i2400m;
+
+ d_fnstart(5, dev, "(i2400ms %p)\n", i2400ms);
+
+ INIT_WORK(&i2400ms->tx_worker, i2400ms_tx_submit);
+ snprintf(i2400ms->tx_wq_name, sizeof(i2400ms->tx_wq_name),
+ "%s-tx", i2400m->wimax_dev.name);
+ i2400ms->tx_workqueue =
+ create_singlethread_workqueue(i2400ms->tx_wq_name);
+ if (NULL == i2400ms->tx_workqueue) {
+ dev_err(dev, "TX: failed to create workqueue\n");
+ result = -ENOMEM;
+ } else
+ result = 0;
+ d_fnend(5, dev, "(i2400ms %p) = %d\n", i2400ms, result);
+ return result;
+}
+
+void i2400ms_tx_release(struct i2400ms *i2400ms)
+{
+ destroy_workqueue(i2400ms->tx_workqueue);
+}
diff --git a/drivers/net/wimax/i2400m/sdio.c b/drivers/net/wimax/i2400m/sdio.c
new file mode 100644
index 000000000000..1bfa283bbd8a
--- /dev/null
+++ b/drivers/net/wimax/i2400m/sdio.c
@@ -0,0 +1,511 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Linux driver model glue for the SDIO device, reset & fw upload
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Dirk Brandewie <dirk.j.brandewie@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * See i2400m-sdio.h for a general description of this driver.
+ *
+ * This file implements driver model glue, and hook ups for the
+ * generic driver to implement the bus-specific functions (device
+ * communication setup/tear down, firmware upload and resetting).
+ *
+ * ROADMAP
+ *
+ * i2400m_probe()
+ * alloc_netdev()
+ * i2400ms_netdev_setup()
+ * i2400ms_init()
+ * i2400m_netdev_setup()
+ * i2400ms_enable_function()
+ * i2400m_setup()
+ *
+ * i2400m_remove()
+ * i2400m_release()
+ * free_netdev(net_dev)
+ *
+ * i2400ms_bus_reset() Called by i2400m->bus_reset
+ * __i2400ms_reset()
+ * __i2400ms_send_barker()
+ *
+ * i2400ms_bus_dev_start() Called by i2400m_dev_start() [who is
+ * i2400ms_tx_setup() called by i2400m_setup()]
+ * i2400ms_rx_setup()
+ *
+ * i2400ms_bus_dev_stop() Called by i2400m_dev_stop() [who is
+ * i2400ms_rx_release() is called by i2400m_release()]
+ * i2400ms_tx_release()
+ *
+ */
+
+#include <linux/debugfs.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+#include "i2400m-sdio.h"
+#include <linux/wimax/i2400m.h>
+
+#define D_SUBMODULE main
+#include "sdio-debug-levels.h"
+
+/* IOE WiMAX function timeout in seconds */
+static int ioe_timeout = 2;
+module_param(ioe_timeout, int, 0);
+
+/* Our firmware file name */
+#define I2400MS_FW_FILE_NAME "i2400m-fw-sdio-" I2400M_FW_VERSION ".sbcf"
+
+/*
+ * Enable the SDIO function
+ *
+ * Tries to enable the SDIO function; might fail if it is still not
+ * ready (in some hardware, the SDIO WiMAX function is only enabled
+ * when we ask it to explicitly doing). Tries until a timeout is
+ * reached.
+ *
+ * The reverse of this is...sdio_disable_function()
+ *
+ * Returns: 0 if the SDIO function was enabled, < 0 errno code on
+ * error (-ENODEV when it was unable to enable the function).
+ */
+static
+int i2400ms_enable_function(struct sdio_func *func)
+{
+ u64 timeout;
+ int err;
+ struct device *dev = &func->dev;
+
+ d_fnstart(3, dev, "(func %p)\n", func);
+ /* Setup timeout (FIXME: This needs to read the CIS table to
+ * get a real timeout) and then wait for the device to signal
+ * it is ready */
+ timeout = get_jiffies_64() + ioe_timeout * HZ;
+ err = -ENODEV;
+ while (err != 0 && time_before64(get_jiffies_64(), timeout)) {
+ sdio_claim_host(func);
+ err = sdio_enable_func(func);
+ if (0 == err) {
+ sdio_release_host(func);
+ d_printf(2, dev, "SDIO function enabled\n");
+ goto function_enabled;
+ }
+ d_printf(2, dev, "SDIO function failed to enable: %d\n", err);
+ sdio_disable_func(func);
+ sdio_release_host(func);
+ msleep(I2400MS_INIT_SLEEP_INTERVAL);
+ }
+ /* If timed out, device is not there yet -- get -ENODEV so
+ * the device driver core will retry later on. */
+ if (err == -ETIME) {
+ dev_err(dev, "Can't enable WiMAX function; "
+ " has the function been enabled?\n");
+ err = -ENODEV;
+ }
+function_enabled:
+ d_fnend(3, dev, "(func %p) = %d\n", func, err);
+ return err;
+}
+
+
+/*
+ * Setup driver resources needed to communicate with the device
+ *
+ * The fw needs some time to settle, and it was just uploaded,
+ * so give it a break first. I'd prefer to just wait for the device to
+ * send something, but seems the poking we do to enable SDIO stuff
+ * interferes with it, so just give it a break before starting...
+ */
+static
+int i2400ms_bus_dev_start(struct i2400m *i2400m)
+{
+ int result;
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ msleep(200);
+ result = i2400ms_rx_setup(i2400ms);
+ if (result < 0)
+ goto error_rx_setup;
+ result = i2400ms_tx_setup(i2400ms);
+ if (result < 0)
+ goto error_tx_setup;
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+
+ i2400ms_tx_release(i2400ms);
+error_tx_setup:
+ i2400ms_rx_release(i2400ms);
+error_rx_setup:
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+ return result;
+}
+
+
+static
+void i2400ms_bus_dev_stop(struct i2400m *i2400m)
+{
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ i2400ms_rx_release(i2400ms);
+ i2400ms_tx_release(i2400ms);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+
+
+/*
+ * Sends a barker buffer to the device
+ *
+ * This helper will allocate a kmalloced buffer and use it to transmit
+ * (then free it). Reason for this is that the SDIO host controller
+ * expects alignment (unknown exactly which) which the stack won't
+ * really provide and certain arches/host-controller combinations
+ * cannot use stack/vmalloc/text areas for DMA transfers.
+ */
+static
+int __i2400ms_send_barker(struct i2400ms *i2400ms,
+ const __le32 *barker, size_t barker_size)
+{
+ int ret;
+ struct sdio_func *func = i2400ms->func;
+ struct device *dev = &func->dev;
+ void *buffer;
+
+ ret = -ENOMEM;
+ buffer = kmalloc(I2400MS_BLK_SIZE, GFP_KERNEL);
+ if (buffer == NULL)
+ goto error_kzalloc;
+
+ memcpy(buffer, barker, barker_size);
+ sdio_claim_host(func);
+ ret = sdio_memcpy_toio(func, 0, buffer, I2400MS_BLK_SIZE);
+ sdio_release_host(func);
+
+ if (ret < 0)
+ d_printf(0, dev, "E: barker error: %d\n", ret);
+
+ kfree(buffer);
+error_kzalloc:
+ return ret;
+}
+
+
+/*
+ * Reset a device at different levels (warm, cold or bus)
+ *
+ * @i2400ms: device descriptor
+ * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
+ *
+ * FIXME: not tested -- need to confirm expected effects
+ *
+ * Warm and cold resets get an SDIO reset if they fail (unimplemented)
+ *
+ * Warm reset:
+ *
+ * The device will be fully reset internally, but won't be
+ * disconnected from the USB bus (so no reenumeration will
+ * happen). Firmware upload will be neccessary.
+ *
+ * The device will send a reboot barker in the notification endpoint
+ * that will trigger the driver to reinitialize the state
+ * automatically from notif.c:i2400m_notification_grok() into
+ * i2400m_dev_bootstrap_delayed().
+ *
+ * Cold and bus (USB) reset:
+ *
+ * The device will be fully reset internally, disconnected from the
+ * USB bus an a reenumeration will happen. Firmware upload will be
+ * neccessary. Thus, we don't do any locking or struct
+ * reinitialization, as we are going to be fully disconnected and
+ * reenumerated.
+ *
+ * Note we need to return -ENODEV if a warm reset was requested and we
+ * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
+ * and wimax_dev->op_reset.
+ *
+ * WARNING: no driver state saved/fixed
+ */
+static
+int i2400ms_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
+{
+ int result;
+ struct i2400ms *i2400ms =
+ container_of(i2400m, struct i2400ms, i2400m);
+ struct device *dev = i2400m_dev(i2400m);
+ static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ };
+ static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ };
+
+ if (rt == I2400M_RT_WARM)
+ result = __i2400ms_send_barker(i2400ms, i2400m_WARM_BOOT_BARKER,
+ sizeof(i2400m_WARM_BOOT_BARKER));
+ else if (rt == I2400M_RT_COLD)
+ result = __i2400ms_send_barker(i2400ms, i2400m_COLD_BOOT_BARKER,
+ sizeof(i2400m_COLD_BOOT_BARKER));
+ else if (rt == I2400M_RT_BUS) {
+do_bus_reset:
+ dev_err(dev, "FIXME: SDIO bus reset not implemented\n");
+ result = rt == I2400M_RT_WARM ? -ENODEV : -ENOSYS;
+ } else
+ BUG();
+ if (result < 0 && rt != I2400M_RT_BUS) {
+ dev_err(dev, "%s reset failed (%d); trying SDIO reset\n",
+ rt == I2400M_RT_WARM ? "warm" : "cold", result);
+ rt = I2400M_RT_BUS;
+ goto do_bus_reset;
+ }
+ return result;
+}
+
+
+static
+void i2400ms_netdev_setup(struct net_device *net_dev)
+{
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct i2400ms *i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ i2400ms_init(i2400ms);
+ i2400m_netdev_setup(net_dev);
+}
+
+
+/*
+ * Debug levels control; see debug.h
+ */
+struct d_level D_LEVEL[] = {
+ D_SUBMODULE_DEFINE(main),
+ D_SUBMODULE_DEFINE(tx),
+ D_SUBMODULE_DEFINE(rx),
+ D_SUBMODULE_DEFINE(fw),
+};
+size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
+
+
+#define __debugfs_register(prefix, name, parent) \
+do { \
+ result = d_level_register_debugfs(prefix, name, parent); \
+ if (result < 0) \
+ goto error; \
+} while (0)
+
+
+static
+int i2400ms_debugfs_add(struct i2400ms *i2400ms)
+{
+ int result;
+ struct dentry *dentry = i2400ms->i2400m.wimax_dev.debugfs_dentry;
+
+ dentry = debugfs_create_dir("i2400m-usb", dentry);
+ result = PTR_ERR(dentry);
+ if (IS_ERR(dentry)) {
+ if (result == -ENODEV)
+ result = 0; /* No debugfs support */
+ goto error;
+ }
+ i2400ms->debugfs_dentry = dentry;
+ __debugfs_register("dl_", main, dentry);
+ __debugfs_register("dl_", tx, dentry);
+ __debugfs_register("dl_", rx, dentry);
+ __debugfs_register("dl_", fw, dentry);
+
+ return 0;
+
+error:
+ debugfs_remove_recursive(i2400ms->debugfs_dentry);
+ return result;
+}
+
+
+/*
+ * Probe a i2400m interface and register it
+ *
+ * @func: SDIO function
+ * @id: SDIO device ID
+ * @returns: 0 if ok, < 0 errno code on error.
+ *
+ * Alloc a net device, initialize the bus-specific details and then
+ * calls the bus-generic initialization routine. That will register
+ * the wimax and netdev devices, upload the firmware [using
+ * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
+ * communication with the device and then will start to talk to it to
+ * finnish setting it up.
+ *
+ * Initialization is tricky; some instances of the hw are packed with
+ * others in a way that requires a third driver that enables the WiMAX
+ * function. In those cases, we can't enable the SDIO function and
+ * we'll return with -ENODEV. When the driver that enables the WiMAX
+ * function does its thing, it has to do a bus_rescan_devices() on the
+ * SDIO bus so this driver is called again to enumerate the WiMAX
+ * function.
+ */
+static
+int i2400ms_probe(struct sdio_func *func,
+ const struct sdio_device_id *id)
+{
+ int result;
+ struct net_device *net_dev;
+ struct device *dev = &func->dev;
+ struct i2400m *i2400m;
+ struct i2400ms *i2400ms;
+
+ /* Allocate instance [calls i2400m_netdev_setup() on it]. */
+ result = -ENOMEM;
+ net_dev = alloc_netdev(sizeof(*i2400ms), "wmx%d",
+ i2400ms_netdev_setup);
+ if (net_dev == NULL) {
+ dev_err(dev, "no memory for network device instance\n");
+ goto error_alloc_netdev;
+ }
+ SET_NETDEV_DEV(net_dev, dev);
+ i2400m = net_dev_to_i2400m(net_dev);
+ i2400ms = container_of(i2400m, struct i2400ms, i2400m);
+ i2400m->wimax_dev.net_dev = net_dev;
+ i2400ms->func = func;
+ sdio_set_drvdata(func, i2400ms);
+
+ i2400m->bus_tx_block_size = I2400MS_BLK_SIZE;
+ i2400m->bus_pl_size_max = I2400MS_PL_SIZE_MAX;
+ i2400m->bus_dev_start = i2400ms_bus_dev_start;
+ i2400m->bus_dev_stop = i2400ms_bus_dev_stop;
+ i2400m->bus_tx_kick = i2400ms_bus_tx_kick;
+ i2400m->bus_reset = i2400ms_bus_reset;
+ i2400m->bus_bm_cmd_send = i2400ms_bus_bm_cmd_send;
+ i2400m->bus_bm_wait_for_ack = i2400ms_bus_bm_wait_for_ack;
+ i2400m->bus_fw_name = I2400MS_FW_FILE_NAME;
+ i2400m->bus_bm_mac_addr_impaired = 1;
+
+ result = i2400ms_enable_function(i2400ms->func);
+ if (result < 0) {
+ dev_err(dev, "Cannot enable SDIO function: %d\n", result);
+ goto error_func_enable;
+ }
+
+ sdio_claim_host(func);
+ result = sdio_set_block_size(func, I2400MS_BLK_SIZE);
+ if (result < 0) {
+ dev_err(dev, "Failed to set block size: %d\n", result);
+ goto error_set_blk_size;
+ }
+ sdio_release_host(func);
+
+ result = i2400m_setup(i2400m, I2400M_BRI_NO_REBOOT);
+ if (result < 0) {
+ dev_err(dev, "cannot setup device: %d\n", result);
+ goto error_setup;
+ }
+
+ result = i2400ms_debugfs_add(i2400ms);
+ if (result < 0) {
+ dev_err(dev, "cannot create SDIO debugfs: %d\n",
+ result);
+ goto error_debugfs_add;
+ }
+ return 0;
+
+error_debugfs_add:
+ i2400m_release(i2400m);
+error_setup:
+ sdio_set_drvdata(func, NULL);
+ sdio_claim_host(func);
+error_set_blk_size:
+ sdio_disable_func(func);
+ sdio_release_host(func);
+error_func_enable:
+ free_netdev(net_dev);
+error_alloc_netdev:
+ return result;
+}
+
+
+static
+void i2400ms_remove(struct sdio_func *func)
+{
+ struct device *dev = &func->dev;
+ struct i2400ms *i2400ms = sdio_get_drvdata(func);
+ struct i2400m *i2400m = &i2400ms->i2400m;
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+
+ d_fnstart(3, dev, "SDIO func %p\n", func);
+ debugfs_remove_recursive(i2400ms->debugfs_dentry);
+ i2400m_release(i2400m);
+ sdio_set_drvdata(func, NULL);
+ sdio_claim_host(func);
+ sdio_disable_func(func);
+ sdio_release_host(func);
+ free_netdev(net_dev);
+ d_fnend(3, dev, "SDIO func %p\n", func);
+}
+
+enum {
+ I2400MS_INTEL_VID = 0x89,
+};
+
+static
+const struct sdio_device_id i2400ms_sdio_ids[] = {
+ /* Intel: i2400m WiMAX over SDIO */
+ { SDIO_DEVICE(I2400MS_INTEL_VID, 0x1402) },
+ { }, /* end: all zeroes */
+};
+MODULE_DEVICE_TABLE(sdio, i2400ms_sdio_ids);
+
+
+static
+struct sdio_driver i2400m_sdio_driver = {
+ .name = KBUILD_MODNAME,
+ .probe = i2400ms_probe,
+ .remove = i2400ms_remove,
+ .id_table = i2400ms_sdio_ids,
+};
+
+
+static
+int __init i2400ms_driver_init(void)
+{
+ return sdio_register_driver(&i2400m_sdio_driver);
+}
+module_init(i2400ms_driver_init);
+
+
+static
+void __exit i2400ms_driver_exit(void)
+{
+ flush_scheduled_work(); /* for the stuff we schedule */
+ sdio_unregister_driver(&i2400m_sdio_driver);
+}
+module_exit(i2400ms_driver_exit);
+
+
+MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
+MODULE_DESCRIPTION("Intel 2400M WiMAX networking for SDIO");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(I2400MS_FW_FILE_NAME);
diff --git a/drivers/net/wimax/i2400m/tx.c b/drivers/net/wimax/i2400m/tx.c
new file mode 100644
index 000000000000..613a88ffd651
--- /dev/null
+++ b/drivers/net/wimax/i2400m/tx.c
@@ -0,0 +1,817 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Generic (non-bus specific) TX handling
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Rewritten to use a single FIFO to lower the memory allocation
+ * pressure and optimize cache hits when copying to the queue, as
+ * well as splitting out bus-specific code.
+ *
+ *
+ * Implements data transmission to the device; this is done through a
+ * software FIFO, as data/control frames can be coalesced (while the
+ * device is reading the previous tx transaction, others accumulate).
+ *
+ * A FIFO is used because at the end it is resource-cheaper that trying
+ * to implement scatter/gather over USB. As well, most traffic is going
+ * to be download (vs upload).
+ *
+ * The format for sending/receiving data to/from the i2400m is
+ * described in detail in rx.c:PROTOCOL FORMAT. In here we implement
+ * the transmission of that. This is split between a bus-independent
+ * part that just prepares everything and a bus-specific part that
+ * does the actual transmission over the bus to the device (in the
+ * bus-specific driver).
+ *
+ *
+ * The general format of a device-host transaction is MSG-HDR, PLD1,
+ * PLD2...PLDN, PL1, PL2,...PLN, PADDING.
+ *
+ * Because we need the send payload descriptors and then payloads and
+ * because it is kind of expensive to do scatterlists in USB (one URB
+ * per node), it becomes cheaper to append all the data to a FIFO
+ * (copying to a FIFO potentially in cache is cheaper).
+ *
+ * Then the bus-specific code takes the parts of that FIFO that are
+ * written and passes them to the device.
+ *
+ * So the concepts to keep in mind there are:
+ *
+ * We use a FIFO to queue the data in a linear buffer. We first append
+ * a MSG-HDR, space for I2400M_TX_PLD_MAX payload descriptors and then
+ * go appending payloads until we run out of space or of payload
+ * descriptors. Then we append padding to make the whole transaction a
+ * multiple of i2400m->bus_tx_block_size (as defined by the bus layer).
+ *
+ * - A TX message: a combination of a message header, payload
+ * descriptors and payloads.
+ *
+ * Open: it is marked as active (i2400m->tx_msg is valid) and we
+ * can keep adding payloads to it.
+ *
+ * Closed: we are not appending more payloads to this TX message
+ * (exahusted space in the queue, too many payloads or
+ * whichever). We have appended padding so the whole message
+ * length is aligned to i2400m->bus_tx_block_size (as set by the
+ * bus/transport layer).
+ *
+ * - Most of the time we keep a TX message open to which we append
+ * payloads.
+ *
+ * - If we are going to append and there is no more space (we are at
+ * the end of the FIFO), we close the message, mark the rest of the
+ * FIFO space unusable (skip_tail), create a new message at the
+ * beginning of the FIFO (if there is space) and append the message
+ * there.
+ *
+ * This is because we need to give linear TX messages to the bus
+ * engine. So we don't write a message to the remaining FIFO space
+ * until the tail and continue at the head of it.
+ *
+ * - We overload one of the fields in the message header to use it as
+ * 'size' of the TX message, so we can iterate over them. It also
+ * contains a flag that indicates if we have to skip it or not.
+ * When we send the buffer, we update that to its real on-the-wire
+ * value.
+ *
+ * - The MSG-HDR PLD1...PLD2 stuff has to be a size multiple of 16.
+ *
+ * It follows that if MSG-HDR says we have N messages, the whole
+ * header + descriptors is 16 + 4*N; for those to be a multiple of
+ * 16, it follows that N can be 4, 8, 12, ... (32, 48, 64, 80...
+ * bytes).
+ *
+ * So if we have only 1 payload, we have to submit a header that in
+ * all truth has space for 4.
+ *
+ * The implication is that we reserve space for 12 (64 bytes); but
+ * if we fill up only (eg) 2, our header becomes 32 bytes only. So
+ * the TX engine has to shift those 32 bytes of msg header and 2
+ * payloads and padding so that right after it the payloads start
+ * and the TX engine has to know about that.
+ *
+ * It is cheaper to move the header up than the whole payloads down.
+ *
+ * We do this in i2400m_tx_close(). See 'i2400m_msg_hdr->offset'.
+ *
+ * - Each payload has to be size-padded to 16 bytes; before appending
+ * it, we just do it.
+ *
+ * - The whole message has to be padded to i2400m->bus_tx_block_size;
+ * we do this at close time. Thus, when reserving space for the
+ * payload, we always make sure there is also free space for this
+ * padding that sooner or later will happen.
+ *
+ * When we append a message, we tell the bus specific code to kick in
+ * TXs. It will TX (in parallel) until the buffer is exhausted--hence
+ * the lockin we do. The TX code will only send a TX message at the
+ * time (which remember, might contain more than one payload). Of
+ * course, when the bus-specific driver attempts to TX a message that
+ * is still open, it gets closed first.
+ *
+ * Gee, this is messy; well a picture. In the example below we have a
+ * partially full FIFO, with a closed message ready to be delivered
+ * (with a moved message header to make sure it is size-aligned to
+ * 16), TAIL room that was unusable (and thus is marked with a message
+ * header that says 'skip this') and at the head of the buffer, an
+ * imcomplete message with a couple of payloads.
+ *
+ * N ___________________________________________________
+ * | |
+ * | TAIL room |
+ * | |
+ * | msg_hdr to skip (size |= 0x80000) |
+ * |---------------------------------------------------|-------
+ * | | /|\
+ * | | |
+ * | TX message padding | |
+ * | | |
+ * | | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
+ * | | |
+ * | payload 1 | |
+ * | | N * tx_block_size
+ * | | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
+ * | | |
+ * | payload 1 | |
+ * | | |
+ * | | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -|- -|- - - -
+ * | padding 3 /|\ | | /|\
+ * | padding 2 | | | |
+ * | pld 1 32 bytes (2 * 16) | | |
+ * | pld 0 | | | |
+ * | moved msg_hdr \|/ | \|/ |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -|- - - |
+ * | | _PLD_SIZE
+ * | unused | |
+ * | | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -| |
+ * | msg_hdr (size X) [this message is closed] | \|/
+ * |===================================================|========== <=== OUT
+ * | |
+ * | |
+ * | |
+ * | Free rooom |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * | |
+ * |===================================================|========== <=== IN
+ * | |
+ * | |
+ * | |
+ * | |
+ * | payload 1 |
+ * | |
+ * | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -|
+ * | |
+ * | payload 0 |
+ * | |
+ * | |
+ * |- - - - - - - - - - - - - - - - - - - - - - - - - -|
+ * | pld 11 /|\ |
+ * | ... | |
+ * | pld 1 64 bytes (2 * 16) |
+ * | pld 0 | |
+ * | msg_hdr (size X) \|/ [message is open] |
+ * 0 ---------------------------------------------------
+ *
+ *
+ * ROADMAP
+ *
+ * i2400m_tx_setup() Called by i2400m_setup
+ * i2400m_tx_release() Called by i2400m_release()
+ *
+ * i2400m_tx() Called to send data or control frames
+ * i2400m_tx_fifo_push() Allocates append-space in the FIFO
+ * i2400m_tx_new() Opens a new message in the FIFO
+ * i2400m_tx_fits() Checks if a new payload fits in the message
+ * i2400m_tx_close() Closes an open message in the FIFO
+ * i2400m_tx_skip_tail() Marks unusable FIFO tail space
+ * i2400m->bus_tx_kick()
+ *
+ * Now i2400m->bus_tx_kick() is the the bus-specific driver backend
+ * implementation; that would do:
+ *
+ * i2400m->bus_tx_kick()
+ * i2400m_tx_msg_get() Gets first message ready to go
+ * ...sends it...
+ * i2400m_tx_msg_sent() Ack the message is sent; repeat from
+ * _tx_msg_get() until it returns NULL
+ * (FIFO empty).
+ */
+#include <linux/netdevice.h>
+#include "i2400m.h"
+
+
+#define D_SUBMODULE tx
+#include "debug-levels.h"
+
+enum {
+ /**
+ * TX Buffer size
+ *
+ * Doc says maximum transaction is 16KiB. If we had 16KiB en
+ * route and 16KiB being queued, it boils down to needing
+ * 32KiB.
+ */
+ I2400M_TX_BUF_SIZE = 32768,
+ /**
+ * Message header and payload descriptors have to be 16
+ * aligned (16 + 4 * N = 16 * M). If we take that average sent
+ * packets are MTU size (~1400-~1500) it follows that we could
+ * fit at most 10-11 payloads in one transaction. To meet the
+ * alignment requirement, that means we need to leave space
+ * for 12 (64 bytes). To simplify, we leave space for that. If
+ * at the end there are less, we pad up to the nearest
+ * multiple of 16.
+ */
+ I2400M_TX_PLD_MAX = 12,
+ I2400M_TX_PLD_SIZE = sizeof(struct i2400m_msg_hdr)
+ + I2400M_TX_PLD_MAX * sizeof(struct i2400m_pld),
+ I2400M_TX_SKIP = 0x80000000,
+};
+
+#define TAIL_FULL ((void *)~(unsigned long)NULL)
+
+/*
+ * Allocate @size bytes in the TX fifo, return a pointer to it
+ *
+ * @i2400m: device descriptor
+ * @size: size of the buffer we need to allocate
+ * @padding: ensure that there is at least this many bytes of free
+ * contiguous space in the fifo. This is needed because later on
+ * we might need to add padding.
+ *
+ * Returns:
+ *
+ * Pointer to the allocated space. NULL if there is no
+ * space. TAIL_FULL if there is no space at the tail but there is at
+ * the head (Case B below).
+ *
+ * These are the two basic cases we need to keep an eye for -- it is
+ * much better explained in linux/kernel/kfifo.c, but this code
+ * basically does the same. No rocket science here.
+ *
+ * Case A Case B
+ * N ___________ ___________
+ * | tail room | | data |
+ * | | | |
+ * |<- IN ->| |<- OUT ->|
+ * | | | |
+ * | data | | room |
+ * | | | |
+ * |<- OUT ->| |<- IN ->|
+ * | | | |
+ * | head room | | data |
+ * 0 ----------- -----------
+ *
+ * We allocate only *contiguous* space.
+ *
+ * We can allocate only from 'room'. In Case B, it is simple; in case
+ * A, we only try from the tail room; if it is not enough, we just
+ * fail and return TAIL_FULL and let the caller figure out if we wants to
+ * skip the tail room and try to allocate from the head.
+ *
+ * Note:
+ *
+ * Assumes i2400m->tx_lock is taken, and we use that as a barrier
+ *
+ * The indexes keep increasing and we reset them to zero when we
+ * pop data off the queue
+ */
+static
+void *i2400m_tx_fifo_push(struct i2400m *i2400m, size_t size, size_t padding)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ size_t room, tail_room, needed_size;
+ void *ptr;
+
+ needed_size = size + padding;
+ room = I2400M_TX_BUF_SIZE - (i2400m->tx_in - i2400m->tx_out);
+ if (room < needed_size) { /* this takes care of Case B */
+ d_printf(2, dev, "fifo push %zu/%zu: no space\n",
+ size, padding);
+ return NULL;
+ }
+ /* Is there space at the tail? */
+ tail_room = I2400M_TX_BUF_SIZE - i2400m->tx_in % I2400M_TX_BUF_SIZE;
+ if (tail_room < needed_size) {
+ if (i2400m->tx_out % I2400M_TX_BUF_SIZE
+ < i2400m->tx_in % I2400M_TX_BUF_SIZE) {
+ d_printf(2, dev, "fifo push %zu/%zu: tail full\n",
+ size, padding);
+ return TAIL_FULL; /* There might be head space */
+ } else {
+ d_printf(2, dev, "fifo push %zu/%zu: no head space\n",
+ size, padding);
+ return NULL; /* There is no space */
+ }
+ }
+ ptr = i2400m->tx_buf + i2400m->tx_in % I2400M_TX_BUF_SIZE;
+ d_printf(2, dev, "fifo push %zu/%zu: at @%zu\n", size, padding,
+ i2400m->tx_in % I2400M_TX_BUF_SIZE);
+ i2400m->tx_in += size;
+ return ptr;
+}
+
+
+/*
+ * Mark the tail of the FIFO buffer as 'to-skip'
+ *
+ * We should never hit the BUG_ON() because all the sizes we push to
+ * the FIFO are padded to be a multiple of 16 -- the size of *msg
+ * (I2400M_PL_PAD for the payloads, I2400M_TX_PLD_SIZE for the
+ * header).
+ *
+ * Note:
+ *
+ * Assumes i2400m->tx_lock is taken, and we use that as a barrier
+ */
+static
+void i2400m_tx_skip_tail(struct i2400m *i2400m)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ size_t tx_in = i2400m->tx_in % I2400M_TX_BUF_SIZE;
+ size_t tail_room = I2400M_TX_BUF_SIZE - tx_in;
+ struct i2400m_msg_hdr *msg = i2400m->tx_buf + tx_in;
+ BUG_ON(tail_room < sizeof(*msg));
+ msg->size = tail_room | I2400M_TX_SKIP;
+ d_printf(2, dev, "skip tail: skipping %zu bytes @%zu\n",
+ tail_room, tx_in);
+ i2400m->tx_in += tail_room;
+}
+
+
+/*
+ * Check if a skb will fit in the TX queue's current active TX
+ * message (if there are still descriptors left unused).
+ *
+ * Returns:
+ * 0 if the message won't fit, 1 if it will.
+ *
+ * Note:
+ *
+ * Assumes a TX message is active (i2400m->tx_msg).
+ *
+ * Assumes i2400m->tx_lock is taken, and we use that as a barrier
+ */
+static
+unsigned i2400m_tx_fits(struct i2400m *i2400m)
+{
+ struct i2400m_msg_hdr *msg_hdr = i2400m->tx_msg;
+ return le16_to_cpu(msg_hdr->num_pls) < I2400M_TX_PLD_MAX;
+
+}
+
+
+/*
+ * Start a new TX message header in the queue.
+ *
+ * Reserve memory from the base FIFO engine and then just initialize
+ * the message header.
+ *
+ * We allocate the biggest TX message header we might need (one that'd
+ * fit I2400M_TX_PLD_MAX payloads) -- when it is closed it will be
+ * 'ironed it out' and the unneeded parts removed.
+ *
+ * NOTE:
+ *
+ * Assumes that the previous message is CLOSED (eg: either
+ * there was none or 'i2400m_tx_close()' was called on it).
+ *
+ * Assumes i2400m->tx_lock is taken, and we use that as a barrier
+ */
+static
+void i2400m_tx_new(struct i2400m *i2400m)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_msg_hdr *tx_msg;
+ BUG_ON(i2400m->tx_msg != NULL);
+try_head:
+ tx_msg = i2400m_tx_fifo_push(i2400m, I2400M_TX_PLD_SIZE, 0);
+ if (tx_msg == NULL)
+ goto out;
+ else if (tx_msg == TAIL_FULL) {
+ i2400m_tx_skip_tail(i2400m);
+ d_printf(2, dev, "new TX message: tail full, trying head\n");
+ goto try_head;
+ }
+ memset(tx_msg, 0, I2400M_TX_PLD_SIZE);
+ tx_msg->size = I2400M_TX_PLD_SIZE;
+out:
+ i2400m->tx_msg = tx_msg;
+ d_printf(2, dev, "new TX message: %p @%zu\n",
+ tx_msg, (void *) tx_msg - i2400m->tx_buf);
+}
+
+
+/*
+ * Finalize the current TX message header
+ *
+ * Sets the message header to be at the proper location depending on
+ * how many descriptors we have (check documentation at the file's
+ * header for more info on that).
+ *
+ * Appends padding bytes to make sure the whole TX message (counting
+ * from the 'relocated' message header) is aligned to
+ * tx_block_size. We assume the _append() code has left enough space
+ * in the FIFO for that. If there are no payloads, just pass, as it
+ * won't be transferred.
+ *
+ * The amount of padding bytes depends on how many payloads are in the
+ * TX message, as the "msg header and payload descriptors" will be
+ * shifted up in the buffer.
+ */
+static
+void i2400m_tx_close(struct i2400m *i2400m)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_msg_hdr *tx_msg = i2400m->tx_msg;
+ struct i2400m_msg_hdr *tx_msg_moved;
+ size_t aligned_size, padding, hdr_size;
+ void *pad_buf;
+
+ if (tx_msg->size & I2400M_TX_SKIP) /* a skipper? nothing to do */
+ goto out;
+
+ /* Relocate the message header
+ *
+ * Find the current header size, align it to 16 and if we need
+ * to move it so the tail is next to the payloads, move it and
+ * set the offset.
+ *
+ * If it moved, this header is good only for transmission; the
+ * original one (it is kept if we moved) is still used to
+ * figure out where the next TX message starts (and where the
+ * offset to the moved header is).
+ */
+ hdr_size = sizeof(*tx_msg)
+ + le16_to_cpu(tx_msg->num_pls) * sizeof(tx_msg->pld[0]);
+ hdr_size = ALIGN(hdr_size, I2400M_PL_PAD);
+ tx_msg->offset = I2400M_TX_PLD_SIZE - hdr_size;
+ tx_msg_moved = (void *) tx_msg + tx_msg->offset;
+ memmove(tx_msg_moved, tx_msg, hdr_size);
+ tx_msg_moved->size -= tx_msg->offset;
+ /*
+ * Now figure out how much we have to add to the (moved!)
+ * message so the size is a multiple of i2400m->bus_tx_block_size.
+ */
+ aligned_size = ALIGN(tx_msg_moved->size, i2400m->bus_tx_block_size);
+ padding = aligned_size - tx_msg_moved->size;
+ if (padding > 0) {
+ pad_buf = i2400m_tx_fifo_push(i2400m, padding, 0);
+ if (unlikely(WARN_ON(pad_buf == NULL
+ || pad_buf == TAIL_FULL))) {
+ /* This should not happen -- append should verify
+ * there is always space left at least to append
+ * tx_block_size */
+ dev_err(dev,
+ "SW BUG! Possible data leakage from memory the "
+ "device should not read for padding - "
+ "size %lu aligned_size %zu tx_buf %p in "
+ "%zu out %zu\n",
+ (unsigned long) tx_msg_moved->size,
+ aligned_size, i2400m->tx_buf, i2400m->tx_in,
+ i2400m->tx_out);
+ } else
+ memset(pad_buf, 0xad, padding);
+ }
+ tx_msg_moved->padding = cpu_to_le16(padding);
+ tx_msg_moved->size += padding;
+ if (tx_msg != tx_msg_moved)
+ tx_msg->size += padding;
+out:
+ i2400m->tx_msg = NULL;
+}
+
+
+/**
+ * i2400m_tx - send the data in a buffer to the device
+ *
+ * @buf: pointer to the buffer to transmit
+ *
+ * @buf_len: buffer size
+ *
+ * @pl_type: type of the payload we are sending.
+ *
+ * Returns:
+ * 0 if ok, < 0 errno code on error (-ENOSPC, if there is no more
+ * room for the message in the queue).
+ *
+ * Appends the buffer to the TX FIFO and notifies the bus-specific
+ * part of the driver that there is new data ready to transmit.
+ * Once this function returns, the buffer has been copied, so it can
+ * be reused.
+ *
+ * The steps followed to append are explained in detail in the file
+ * header.
+ *
+ * Whenever we write to a message, we increase msg->size, so it
+ * reflects exactly how big the message is. This is needed so that if
+ * we concatenate two messages before they can be sent, the code that
+ * sends the messages can find the boundaries (and it will replace the
+ * size with the real barker before sending).
+ *
+ * Note:
+ *
+ * Cold and warm reset payloads need to be sent as a single
+ * payload, so we handle that.
+ */
+int i2400m_tx(struct i2400m *i2400m, const void *buf, size_t buf_len,
+ enum i2400m_pt pl_type)
+{
+ int result = -ENOSPC;
+ struct device *dev = i2400m_dev(i2400m);
+ unsigned long flags;
+ size_t padded_len;
+ void *ptr;
+ unsigned is_singleton = pl_type == I2400M_PT_RESET_WARM
+ || pl_type == I2400M_PT_RESET_COLD;
+
+ d_fnstart(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u)\n",
+ i2400m, buf, buf_len, pl_type);
+ padded_len = ALIGN(buf_len, I2400M_PL_PAD);
+ d_printf(5, dev, "padded_len %zd buf_len %zd\n", padded_len, buf_len);
+ /* If there is no current TX message, create one; if the
+ * current one is out of payload slots or we have a singleton,
+ * close it and start a new one */
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+try_new:
+ if (unlikely(i2400m->tx_msg == NULL))
+ i2400m_tx_new(i2400m);
+ else if (unlikely(!i2400m_tx_fits(i2400m)
+ || (is_singleton && i2400m->tx_msg->num_pls != 0))) {
+ d_printf(2, dev, "closing TX message (fits %u singleton "
+ "%u num_pls %u)\n", i2400m_tx_fits(i2400m),
+ is_singleton, i2400m->tx_msg->num_pls);
+ i2400m_tx_close(i2400m);
+ i2400m_tx_new(i2400m);
+ }
+ if (i2400m->tx_msg->size + padded_len > I2400M_TX_BUF_SIZE / 2) {
+ d_printf(2, dev, "TX: message too big, going new\n");
+ i2400m_tx_close(i2400m);
+ i2400m_tx_new(i2400m);
+ }
+ if (i2400m->tx_msg == NULL)
+ goto error_tx_new;
+ /* So we have a current message header; now append space for
+ * the message -- if there is not enough, try the head */
+ ptr = i2400m_tx_fifo_push(i2400m, padded_len,
+ i2400m->bus_tx_block_size);
+ if (ptr == TAIL_FULL) { /* Tail is full, try head */
+ d_printf(2, dev, "pl append: tail full\n");
+ i2400m_tx_close(i2400m);
+ i2400m_tx_skip_tail(i2400m);
+ goto try_new;
+ } else if (ptr == NULL) { /* All full */
+ result = -ENOSPC;
+ d_printf(2, dev, "pl append: all full\n");
+ } else { /* Got space, copy it, set padding */
+ struct i2400m_msg_hdr *tx_msg = i2400m->tx_msg;
+ unsigned num_pls = le16_to_cpu(tx_msg->num_pls);
+ memcpy(ptr, buf, buf_len);
+ memset(ptr + buf_len, 0xad, padded_len - buf_len);
+ i2400m_pld_set(&tx_msg->pld[num_pls], buf_len, pl_type);
+ d_printf(3, dev, "pld 0x%08x (type 0x%1x len 0x%04zx\n",
+ le32_to_cpu(tx_msg->pld[num_pls].val),
+ pl_type, buf_len);
+ tx_msg->num_pls = le16_to_cpu(num_pls+1);
+ tx_msg->size += padded_len;
+ d_printf(2, dev, "TX: appended %zu b (up to %u b) pl #%u \n",
+ padded_len, tx_msg->size, num_pls+1);
+ d_printf(2, dev,
+ "TX: appended hdr @%zu %zu b pl #%u @%zu %zu/%zu b\n",
+ (void *)tx_msg - i2400m->tx_buf, (size_t)tx_msg->size,
+ num_pls+1, ptr - i2400m->tx_buf, buf_len, padded_len);
+ result = 0;
+ if (is_singleton)
+ i2400m_tx_close(i2400m);
+ }
+error_tx_new:
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ i2400m->bus_tx_kick(i2400m); /* always kick, might free up space */
+ d_fnend(3, dev, "(i2400m %p skb %p [%zu bytes] pt %u) = %d\n",
+ i2400m, buf, buf_len, pl_type, result);
+ return result;
+}
+EXPORT_SYMBOL_GPL(i2400m_tx);
+
+
+/**
+ * i2400m_tx_msg_get - Get the first TX message in the FIFO to start sending it
+ *
+ * @i2400m: device descriptors
+ * @bus_size: where to place the size of the TX message
+ *
+ * Called by the bus-specific driver to get the first TX message at
+ * the FIF that is ready for transmission.
+ *
+ * It sets the state in @i2400m to indicate the bus-specific driver is
+ * transfering that message (i2400m->tx_msg_size).
+ *
+ * Once the transfer is completed, call i2400m_tx_msg_sent().
+ *
+ * Notes:
+ *
+ * The size of the TX message to be transmitted might be smaller than
+ * that of the TX message in the FIFO (in case the header was
+ * shorter). Hence, we copy it in @bus_size, for the bus layer to
+ * use. We keep the message's size in i2400m->tx_msg_size so that
+ * when the bus later is done transferring we know how much to
+ * advance the fifo.
+ *
+ * We collect statistics here as all the data is available and we
+ * assume it is going to work [see i2400m_tx_msg_sent()].
+ */
+struct i2400m_msg_hdr *i2400m_tx_msg_get(struct i2400m *i2400m,
+ size_t *bus_size)
+{
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400m_msg_hdr *tx_msg, *tx_msg_moved;
+ unsigned long flags, pls;
+
+ d_fnstart(3, dev, "(i2400m %p bus_size %p)\n", i2400m, bus_size);
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+skip:
+ tx_msg_moved = NULL;
+ if (i2400m->tx_in == i2400m->tx_out) { /* Empty FIFO? */
+ i2400m->tx_in = 0;
+ i2400m->tx_out = 0;
+ d_printf(2, dev, "TX: FIFO empty: resetting\n");
+ goto out_unlock;
+ }
+ tx_msg = i2400m->tx_buf + i2400m->tx_out % I2400M_TX_BUF_SIZE;
+ if (tx_msg->size & I2400M_TX_SKIP) { /* skip? */
+ d_printf(2, dev, "TX: skip: msg @%zu (%zu b)\n",
+ i2400m->tx_out % I2400M_TX_BUF_SIZE,
+ (size_t) tx_msg->size & ~I2400M_TX_SKIP);
+ i2400m->tx_out += tx_msg->size & ~I2400M_TX_SKIP;
+ goto skip;
+ }
+
+ if (tx_msg->num_pls == 0) { /* No payloads? */
+ if (tx_msg == i2400m->tx_msg) { /* open, we are done */
+ d_printf(2, dev,
+ "TX: FIFO empty: open msg w/o payloads @%zu\n",
+ (void *) tx_msg - i2400m->tx_buf);
+ tx_msg = NULL;
+ goto out_unlock;
+ } else { /* closed, skip it */
+ d_printf(2, dev,
+ "TX: skip msg w/o payloads @%zu (%zu b)\n",
+ (void *) tx_msg - i2400m->tx_buf,
+ (size_t) tx_msg->size);
+ i2400m->tx_out += tx_msg->size & ~I2400M_TX_SKIP;
+ goto skip;
+ }
+ }
+ if (tx_msg == i2400m->tx_msg) /* open msg? */
+ i2400m_tx_close(i2400m);
+
+ /* Now we have a valid TX message (with payloads) to TX */
+ tx_msg_moved = (void *) tx_msg + tx_msg->offset;
+ i2400m->tx_msg_size = tx_msg->size;
+ *bus_size = tx_msg_moved->size;
+ d_printf(2, dev, "TX: pid %d msg hdr at @%zu offset +@%zu "
+ "size %zu bus_size %zu\n",
+ current->pid, (void *) tx_msg - i2400m->tx_buf,
+ (size_t) tx_msg->offset, (size_t) tx_msg->size,
+ (size_t) tx_msg_moved->size);
+ tx_msg_moved->barker = le32_to_cpu(I2400M_H2D_PREVIEW_BARKER);
+ tx_msg_moved->sequence = le32_to_cpu(i2400m->tx_sequence++);
+
+ pls = le32_to_cpu(tx_msg_moved->num_pls);
+ i2400m->tx_pl_num += pls; /* Update stats */
+ if (pls > i2400m->tx_pl_max)
+ i2400m->tx_pl_max = pls;
+ if (pls < i2400m->tx_pl_min)
+ i2400m->tx_pl_min = pls;
+ i2400m->tx_num++;
+ i2400m->tx_size_acc += *bus_size;
+ if (*bus_size < i2400m->tx_size_min)
+ i2400m->tx_size_min = *bus_size;
+ if (*bus_size > i2400m->tx_size_max)
+ i2400m->tx_size_max = *bus_size;
+out_unlock:
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ d_fnstart(3, dev, "(i2400m %p bus_size %p [%zu]) = %p\n",
+ i2400m, bus_size, *bus_size, tx_msg_moved);
+ return tx_msg_moved;
+}
+EXPORT_SYMBOL_GPL(i2400m_tx_msg_get);
+
+
+/**
+ * i2400m_tx_msg_sent - indicate the transmission of a TX message
+ *
+ * @i2400m: device descriptor
+ *
+ * Called by the bus-specific driver when a message has been sent;
+ * this pops it from the FIFO; and as there is space, start the queue
+ * in case it was stopped.
+ *
+ * Should be called even if the message send failed and we are
+ * dropping this TX message.
+ */
+void i2400m_tx_msg_sent(struct i2400m *i2400m)
+{
+ unsigned n;
+ unsigned long flags;
+ struct device *dev = i2400m_dev(i2400m);
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ spin_lock_irqsave(&i2400m->tx_lock, flags);
+ i2400m->tx_out += i2400m->tx_msg_size;
+ d_printf(2, dev, "TX: sent %zu b\n", (size_t) i2400m->tx_msg_size);
+ i2400m->tx_msg_size = 0;
+ BUG_ON(i2400m->tx_out > i2400m->tx_in);
+ /* level them FIFO markers off */
+ n = i2400m->tx_out / I2400M_TX_BUF_SIZE;
+ i2400m->tx_out %= I2400M_TX_BUF_SIZE;
+ i2400m->tx_in -= n * I2400M_TX_BUF_SIZE;
+ netif_start_queue(i2400m->wimax_dev.net_dev);
+ spin_unlock_irqrestore(&i2400m->tx_lock, flags);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+EXPORT_SYMBOL_GPL(i2400m_tx_msg_sent);
+
+
+/**
+ * i2400m_tx_setup - Initialize the TX queue and infrastructure
+ *
+ * Make sure we reset the TX sequence to zero, as when this function
+ * is called, the firmware has been just restarted.
+ */
+int i2400m_tx_setup(struct i2400m *i2400m)
+{
+ int result;
+
+ /* Do this here only once -- can't do on
+ * i2400m_hard_start_xmit() as we'll cause race conditions if
+ * the WS was scheduled on another CPU */
+ INIT_WORK(&i2400m->wake_tx_ws, i2400m_wake_tx_work);
+
+ i2400m->tx_sequence = 0;
+ i2400m->tx_buf = kmalloc(I2400M_TX_BUF_SIZE, GFP_KERNEL);
+ if (i2400m->tx_buf == NULL)
+ result = -ENOMEM;
+ else
+ result = 0;
+ /* Huh? the bus layer has to define this... */
+ BUG_ON(i2400m->bus_tx_block_size == 0);
+ return result;
+
+}
+
+
+/**
+ * i2400m_tx_release - Tear down the TX queue and infrastructure
+ */
+void i2400m_tx_release(struct i2400m *i2400m)
+{
+ kfree(i2400m->tx_buf);
+}
diff --git a/drivers/net/wimax/i2400m/usb-debug-levels.h b/drivers/net/wimax/i2400m/usb-debug-levels.h
new file mode 100644
index 000000000000..e4358bd880be
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb-debug-levels.h
@@ -0,0 +1,42 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Debug levels control file for the i2400m-usb module
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+#ifndef __debug_levels__h__
+#define __debug_levels__h__
+
+/* Maximum compile and run time debug level for all submodules */
+#define D_MODULENAME i2400m_usb
+#define D_MASTER CONFIG_WIMAX_I2400M_DEBUG_LEVEL
+
+#include <linux/wimax/debug.h>
+
+/* List of all the enabled modules */
+enum d_module {
+ D_SUBMODULE_DECLARE(usb),
+ D_SUBMODULE_DECLARE(fw),
+ D_SUBMODULE_DECLARE(notif),
+ D_SUBMODULE_DECLARE(rx),
+ D_SUBMODULE_DECLARE(tx),
+};
+
+
+#endif /* #ifndef __debug_levels__h__ */
diff --git a/drivers/net/wimax/i2400m/usb-fw.c b/drivers/net/wimax/i2400m/usb-fw.c
new file mode 100644
index 000000000000..5ad287c228b8
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb-fw.c
@@ -0,0 +1,340 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Firmware uploader's USB specifics
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Initial implementation
+ *
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - bus generic/specific split
+ *
+ * THE PROCEDURE
+ *
+ * See fw.c for the generic description of this procedure.
+ *
+ * This file implements only the USB specifics. It boils down to how
+ * to send a command and waiting for an acknowledgement from the
+ * device.
+ *
+ * This code (and process) is single threaded. It assumes it is the
+ * only thread poking around (guaranteed by fw.c).
+ *
+ * COMMAND EXECUTION
+ *
+ * A write URB is posted with the buffer to the bulk output endpoint.
+ *
+ * ACK RECEPTION
+ *
+ * We just post a URB to the notification endpoint and wait for
+ * data. We repeat until we get all the data we expect (as indicated
+ * by the call from the bus generic code).
+ *
+ * The data is not read from the bulk in endpoint for boot mode.
+ *
+ * ROADMAP
+ *
+ * i2400mu_bus_bm_cmd_send
+ * i2400m_bm_cmd_prepare...
+ * i2400mu_tx_bulk_out
+ *
+ * i2400mu_bus_bm_wait_for_ack
+ * i2400m_notif_submit
+ */
+#include <linux/usb.h>
+#include "i2400m-usb.h"
+
+
+#define D_SUBMODULE fw
+#include "usb-debug-levels.h"
+
+
+/*
+ * Synchronous write to the device
+ *
+ * Takes care of updating EDC counts and thus, handle device errors.
+ */
+static
+ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
+{
+ int result;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ int len;
+ struct usb_endpoint_descriptor *epd;
+ int pipe, do_autopm = 1;
+
+ result = usb_autopm_get_interface(i2400mu->usb_iface);
+ if (result < 0) {
+ dev_err(dev, "BM-CMD: can't get autopm: %d\n", result);
+ do_autopm = 0;
+ }
+ epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_OUT);
+ pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+retry:
+ result = usb_bulk_msg(i2400mu->usb_dev, pipe, buf, buf_size, &len, HZ);
+ switch (result) {
+ case 0:
+ if (len != buf_size) {
+ dev_err(dev, "BM-CMD: short write (%u B vs %zu "
+ "expected)\n", len, buf_size);
+ result = -EIO;
+ break;
+ }
+ result = len;
+ break;
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* just ignore it */
+ case -ESHUTDOWN: /* and exit */
+ case -ECONNRESET:
+ result = -ESHUTDOWN;
+ break;
+ case -ETIMEDOUT: /* bah... */
+ break;
+ default: /* any other? */
+ if (edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+ dev_err(dev, "BM-CMD: maximum errors in "
+ "URB exceeded; resetting device\n");
+ usb_queue_reset_device(i2400mu->usb_iface);
+ result = -ENODEV;
+ break;
+ }
+ dev_err(dev, "BM-CMD: URB error %d, retrying\n",
+ result);
+ goto retry;
+ }
+ result = len;
+ if (do_autopm)
+ usb_autopm_put_interface(i2400mu->usb_iface);
+ return result;
+}
+
+
+/*
+ * Send a boot-mode command over the bulk-out pipe
+ *
+ * Command can be a raw command, which requires no preparation (and
+ * which might not even be following the command format). Checks that
+ * the right amount of data was transfered.
+ *
+ * To satisfy USB requirements (no onstack, vmalloc or in data segment
+ * buffers), we copy the command to i2400m->bm_cmd_buf and send it from
+ * there.
+ *
+ * @flags: pass thru from i2400m_bm_cmd()
+ * @return: cmd_size if ok, < 0 errno code on error.
+ */
+ssize_t i2400mu_bus_bm_cmd_send(struct i2400m *i2400m,
+ const struct i2400m_bootrom_header *_cmd,
+ size_t cmd_size, int flags)
+{
+ ssize_t result;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ int opcode = _cmd == NULL ? -1 : i2400m_brh_get_opcode(_cmd);
+ struct i2400m_bootrom_header *cmd;
+ size_t cmd_size_a = ALIGN(cmd_size, 16); /* USB restriction */
+
+ d_fnstart(8, dev, "(i2400m %p cmd %p size %zu)\n",
+ i2400m, _cmd, cmd_size);
+ result = -E2BIG;
+ if (cmd_size > I2400M_BM_CMD_BUF_SIZE)
+ goto error_too_big;
+ memcpy(i2400m->bm_cmd_buf, _cmd, cmd_size);
+ cmd = i2400m->bm_cmd_buf;
+ if (cmd_size_a > cmd_size) /* Zero pad space */
+ memset(i2400m->bm_cmd_buf + cmd_size, 0, cmd_size_a - cmd_size);
+ if ((flags & I2400M_BM_CMD_RAW) == 0) {
+ if (WARN_ON(i2400m_brh_get_response_required(cmd) == 0))
+ dev_warn(dev, "SW BUG: response_required == 0\n");
+ i2400m_bm_cmd_prepare(cmd);
+ }
+ result = i2400mu_tx_bulk_out(i2400mu, i2400m->bm_cmd_buf, cmd_size);
+ if (result < 0) {
+ dev_err(dev, "boot-mode cmd %d: cannot send: %zd\n",
+ opcode, result);
+ goto error_cmd_send;
+ }
+ if (result != cmd_size) { /* all was transferred? */
+ dev_err(dev, "boot-mode cmd %d: incomplete transfer "
+ "(%zu vs %zu submitted)\n", opcode, result, cmd_size);
+ result = -EIO;
+ goto error_cmd_size;
+ }
+error_cmd_size:
+error_cmd_send:
+error_too_big:
+ d_fnend(8, dev, "(i2400m %p cmd %p size %zu) = %zd\n",
+ i2400m, _cmd, cmd_size, result);
+ return result;
+}
+
+
+static
+void __i2400mu_bm_notif_cb(struct urb *urb)
+{
+ complete(urb->context);
+}
+
+
+/*
+ * submit a read to the notification endpoint
+ *
+ * @i2400m: device descriptor
+ * @urb: urb to use
+ * @completion: completion varible to complete when done
+ *
+ * Data is always read to i2400m->bm_ack_buf
+ */
+static
+int i2400mu_notif_submit(struct i2400mu *i2400mu, struct urb *urb,
+ struct completion *completion)
+{
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct usb_endpoint_descriptor *epd;
+ int pipe;
+
+ epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_NOTIFICATION);
+ pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+ usb_fill_int_urb(urb, i2400mu->usb_dev, pipe,
+ i2400m->bm_ack_buf, I2400M_BM_ACK_BUF_SIZE,
+ __i2400mu_bm_notif_cb, completion,
+ epd->bInterval);
+ return usb_submit_urb(urb, GFP_KERNEL);
+}
+
+
+/*
+ * Read an ack from the notification endpoint
+ *
+ * @i2400m:
+ * @_ack: pointer to where to store the read data
+ * @ack_size: how many bytes we should read
+ *
+ * Returns: < 0 errno code on error; otherwise, amount of received bytes.
+ *
+ * Submits a notification read, appends the read data to the given ack
+ * buffer and then repeats (until @ack_size bytes have been
+ * received).
+ */
+ssize_t i2400mu_bus_bm_wait_for_ack(struct i2400m *i2400m,
+ struct i2400m_bootrom_header *_ack,
+ size_t ack_size)
+{
+ ssize_t result = -ENOMEM;
+ struct device *dev = i2400m_dev(i2400m);
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ struct urb notif_urb;
+ void *ack = _ack;
+ size_t offset, len;
+ long val;
+ int do_autopm = 1;
+ DECLARE_COMPLETION_ONSTACK(notif_completion);
+
+ d_fnstart(8, dev, "(i2400m %p ack %p size %zu)\n",
+ i2400m, ack, ack_size);
+ BUG_ON(_ack == i2400m->bm_ack_buf);
+ result = usb_autopm_get_interface(i2400mu->usb_iface);
+ if (result < 0) {
+ dev_err(dev, "BM-ACK: can't get autopm: %d\n", (int) result);
+ do_autopm = 0;
+ }
+ usb_init_urb(&notif_urb); /* ready notifications */
+ usb_get_urb(&notif_urb);
+ offset = 0;
+ while (offset < ack_size) {
+ init_completion(&notif_completion);
+ result = i2400mu_notif_submit(i2400mu, &notif_urb,
+ &notif_completion);
+ if (result < 0)
+ goto error_notif_urb_submit;
+ val = wait_for_completion_interruptible_timeout(
+ &notif_completion, HZ);
+ if (val == 0) {
+ result = -ETIMEDOUT;
+ usb_kill_urb(&notif_urb); /* Timedout */
+ goto error_notif_wait;
+ }
+ if (val == -ERESTARTSYS) {
+ result = -EINTR; /* Interrupted */
+ usb_kill_urb(&notif_urb);
+ goto error_notif_wait;
+ }
+ result = notif_urb.status; /* How was the ack? */
+ switch (result) {
+ case 0:
+ break;
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* just ignore it */
+ case -ESHUTDOWN: /* and exit */
+ case -ECONNRESET:
+ result = -ESHUTDOWN;
+ goto error_dev_gone;
+ default: /* any other? */
+ usb_kill_urb(&notif_urb); /* Timedout */
+ if (edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
+ goto error_exceeded;
+ dev_err(dev, "BM-ACK: URB error %d, "
+ "retrying\n", notif_urb.status);
+ continue; /* retry */
+ }
+ if (notif_urb.actual_length == 0) {
+ d_printf(6, dev, "ZLP received, retrying\n");
+ continue;
+ }
+ /* Got data, append it to the buffer */
+ len = min(ack_size - offset, (size_t) notif_urb.actual_length);
+ memcpy(ack + offset, i2400m->bm_ack_buf, len);
+ offset += len;
+ }
+ result = offset;
+error_notif_urb_submit:
+error_notif_wait:
+error_dev_gone:
+out:
+ if (do_autopm)
+ usb_autopm_put_interface(i2400mu->usb_iface);
+ d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %zd\n",
+ i2400m, ack, ack_size, result);
+ return result;
+
+error_exceeded:
+ dev_err(dev, "bm: maximum errors in notification URB exceeded; "
+ "resetting device\n");
+ usb_queue_reset_device(i2400mu->usb_iface);
+ goto out;
+}
diff --git a/drivers/net/wimax/i2400m/usb-notif.c b/drivers/net/wimax/i2400m/usb-notif.c
new file mode 100644
index 000000000000..9702c22b2497
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb-notif.c
@@ -0,0 +1,269 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m over USB
+ * Notification handling
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Initial implementation
+ *
+ *
+ * The notification endpoint is active when the device is not in boot
+ * mode; in here we just read and get notifications; based on those,
+ * we act to either reinitialize the device after a reboot or to
+ * submit a RX request.
+ *
+ * ROADMAP
+ *
+ * i2400mu_usb_notification_setup()
+ *
+ * i2400mu_usb_notification_release()
+ *
+ * i2400mu_usb_notification_cb() Called when a URB is ready
+ * i2400mu_notif_grok()
+ * i2400m_dev_reset_handle()
+ * i2400mu_rx_kick()
+ */
+#include <linux/usb.h>
+#include "i2400m-usb.h"
+
+
+#define D_SUBMODULE notif
+#include "usb-debug-levels.h"
+
+
+static const
+__le32 i2400m_ZERO_BARKER[4] = { 0, 0, 0, 0 };
+
+
+/*
+ * Process a received notification
+ *
+ * In normal operation mode, we can only receive two types of payloads
+ * on the notification endpoint:
+ *
+ * - a reboot barker, we do a bootstrap (the device has reseted).
+ *
+ * - a block of zeroes: there is pending data in the IN endpoint
+ */
+static
+int i2400mu_notification_grok(struct i2400mu *i2400mu, const void *buf,
+ size_t buf_len)
+{
+ int ret;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+
+ d_fnstart(4, dev, "(i2400m %p buf %p buf_len %zu)\n",
+ i2400mu, buf, buf_len);
+ ret = -EIO;
+ if (buf_len < sizeof(i2400m_NBOOT_BARKER))
+ /* Not a bug, just ignore */
+ goto error_bad_size;
+ if (!memcmp(i2400m_NBOOT_BARKER, buf, sizeof(i2400m_NBOOT_BARKER))
+ || !memcmp(i2400m_SBOOT_BARKER, buf, sizeof(i2400m_SBOOT_BARKER)))
+ ret = i2400m_dev_reset_handle(i2400m);
+ else if (!memcmp(i2400m_ZERO_BARKER, buf, sizeof(i2400m_ZERO_BARKER))) {
+ i2400mu_rx_kick(i2400mu);
+ ret = 0;
+ } else { /* Unknown or unexpected data in the notif message */
+ char prefix[64];
+ ret = -EIO;
+ dev_err(dev, "HW BUG? Unknown/unexpected data in notification "
+ "message (%zu bytes)\n", buf_len);
+ snprintf(prefix, sizeof(prefix), "%s %s: ",
+ dev_driver_string(dev) , dev->bus_id);
+ if (buf_len > 64) {
+ print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
+ 8, 4, buf, 64, 0);
+ printk(KERN_ERR "%s... (only first 64 bytes "
+ "dumped)\n", prefix);
+ } else
+ print_hex_dump(KERN_ERR, prefix, DUMP_PREFIX_OFFSET,
+ 8, 4, buf, buf_len, 0);
+ }
+error_bad_size:
+ d_fnend(4, dev, "(i2400m %p buf %p buf_len %zu) = %d\n",
+ i2400mu, buf, buf_len, ret);
+ return ret;
+}
+
+
+/*
+ * URB callback for the notification endpoint
+ *
+ * @urb: the urb received from the notification endpoint
+ *
+ * This function will just process the USB side of the transaction,
+ * checking everything is fine, pass the processing to
+ * i2400m_notification_grok() and resubmit the URB.
+ */
+static
+void i2400mu_notification_cb(struct urb *urb)
+{
+ int ret;
+ struct i2400mu *i2400mu = urb->context;
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(4, dev, "(urb %p status %d actual_length %d)\n",
+ urb, urb->status, urb->actual_length);
+ ret = urb->status;
+ switch (ret) {
+ case 0:
+ ret = i2400mu_notification_grok(i2400mu, urb->transfer_buffer,
+ urb->actual_length);
+ if (ret == -EIO && edc_inc(&i2400mu->urb_edc, EDC_MAX_ERRORS,
+ EDC_ERROR_TIMEFRAME))
+ goto error_exceeded;
+ if (ret == -ENOMEM) /* uff...power cycle? shutdown? */
+ goto error_exceeded;
+ break;
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* ditto */
+ case -ESHUTDOWN: /* URB killed */
+ case -ECONNRESET: /* disconnection */
+ goto out; /* Notify around */
+ default: /* Some error? */
+ if (edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
+ goto error_exceeded;
+ dev_err(dev, "notification: URB error %d, retrying\n",
+ urb->status);
+ }
+ usb_mark_last_busy(i2400mu->usb_dev);
+ ret = usb_submit_urb(i2400mu->notif_urb, GFP_ATOMIC);
+ switch (ret) {
+ case 0:
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* ditto */
+ case -ESHUTDOWN: /* URB killed */
+ case -ECONNRESET: /* disconnection */
+ break; /* just ignore */
+ default: /* Some error? */
+ dev_err(dev, "notification: cannot submit URB: %d\n", ret);
+ goto error_submit;
+ }
+ d_fnend(4, dev, "(urb %p status %d actual_length %d) = void\n",
+ urb, urb->status, urb->actual_length);
+ return;
+
+error_exceeded:
+ dev_err(dev, "maximum errors in notification URB exceeded; "
+ "resetting device\n");
+error_submit:
+ usb_queue_reset_device(i2400mu->usb_iface);
+out:
+ d_fnend(4, dev, "(urb %p status %d actual_length %d) = void\n",
+ urb, urb->status, urb->actual_length);
+ return;
+}
+
+
+/*
+ * setup the notification endpoint
+ *
+ * @i2400m: device descriptor
+ *
+ * This procedure prepares the notification urb and handler for receiving
+ * unsolicited barkers from the device.
+ */
+int i2400mu_notification_setup(struct i2400mu *i2400mu)
+{
+ struct device *dev = &i2400mu->usb_iface->dev;
+ int usb_pipe, ret = 0;
+ struct usb_endpoint_descriptor *epd;
+ char *buf;
+
+ d_fnstart(4, dev, "(i2400m %p)\n", i2400mu);
+ buf = kmalloc(I2400MU_MAX_NOTIFICATION_LEN, GFP_KERNEL | GFP_DMA);
+ if (buf == NULL) {
+ dev_err(dev, "notification: buffer allocation failed\n");
+ ret = -ENOMEM;
+ goto error_buf_alloc;
+ }
+
+ i2400mu->notif_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!i2400mu->notif_urb) {
+ ret = -ENOMEM;
+ dev_err(dev, "notification: cannot allocate URB\n");
+ goto error_alloc_urb;
+ }
+ epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_NOTIFICATION);
+ usb_pipe = usb_rcvintpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+ usb_fill_int_urb(i2400mu->notif_urb, i2400mu->usb_dev, usb_pipe,
+ buf, I2400MU_MAX_NOTIFICATION_LEN,
+ i2400mu_notification_cb, i2400mu, epd->bInterval);
+ ret = usb_submit_urb(i2400mu->notif_urb, GFP_KERNEL);
+ if (ret != 0) {
+ dev_err(dev, "notification: cannot submit URB: %d\n", ret);
+ goto error_submit;
+ }
+ d_fnend(4, dev, "(i2400m %p) = %d\n", i2400mu, ret);
+ return ret;
+
+error_submit:
+ usb_free_urb(i2400mu->notif_urb);
+error_alloc_urb:
+ kfree(buf);
+error_buf_alloc:
+ d_fnend(4, dev, "(i2400m %p) = %d\n", i2400mu, ret);
+ return ret;
+}
+
+
+/*
+ * Tear down of the notification mechanism
+ *
+ * @i2400m: device descriptor
+ *
+ * Kill the interrupt endpoint urb, free any allocated resources.
+ *
+ * We need to check if we have done it before as for example,
+ * _suspend() call this; if after a suspend() we get a _disconnect()
+ * (as the case is when hibernating), nothing bad happens.
+ */
+void i2400mu_notification_release(struct i2400mu *i2400mu)
+{
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+ if (i2400mu->notif_urb != NULL) {
+ usb_kill_urb(i2400mu->notif_urb);
+ kfree(i2400mu->notif_urb->transfer_buffer);
+ usb_free_urb(i2400mu->notif_urb);
+ i2400mu->notif_urb = NULL;
+ }
+ d_fnend(4, dev, "(i2400mu %p)\n", i2400mu);
+}
diff --git a/drivers/net/wimax/i2400m/usb-rx.c b/drivers/net/wimax/i2400m/usb-rx.c
new file mode 100644
index 000000000000..074cc1f89853
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb-rx.c
@@ -0,0 +1,417 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * USB RX handling
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Use skb_clone(), break up processing in chunks
+ * - Split transport/device specific
+ * - Make buffer size dynamic to exert less memory pressure
+ *
+ *
+ * This handles the RX path on USB.
+ *
+ * When a notification is received that says 'there is RX data ready',
+ * we call i2400mu_rx_kick(); that wakes up the RX kthread, which
+ * reads a buffer from USB and passes it to i2400m_rx() in the generic
+ * handling code. The RX buffer has an specific format that is
+ * described in rx.c.
+ *
+ * We use a kernel thread in a loop because:
+ *
+ * - we want to be able to call the USB power management get/put
+ * functions (blocking) before each transaction.
+ *
+ * - We might get a lot of notifications and we don't want to submit
+ * a zillion reads; by serializing, we are throttling.
+ *
+ * - RX data processing can get heavy enough so that it is not
+ * appropiate for doing it in the USB callback; thus we run it in a
+ * process context.
+ *
+ * We provide a read buffer of an arbitrary size (short of a page); if
+ * the callback reports -EOVERFLOW, it means it was too small, so we
+ * just double the size and retry (being careful to append, as
+ * sometimes the device provided some data). Every now and then we
+ * check if the average packet size is smaller than the current packet
+ * size and if so, we halve it. At the end, the size of the
+ * preallocated buffer should be following the average received
+ * transaction size, adapting dynamically to it.
+ *
+ * ROADMAP
+ *
+ * i2400mu_rx_kick() Called from notif.c when we get a
+ * 'data ready' notification
+ * i2400mu_rxd() Kernel RX daemon
+ * i2400mu_rx() Receive USB data
+ * i2400m_rx() Send data to generic i2400m RX handling
+ *
+ * i2400mu_rx_setup() called from i2400mu_bus_dev_start()
+ *
+ * i2400mu_rx_release() called from i2400mu_bus_dev_stop()
+ */
+#include <linux/workqueue.h>
+#include <linux/usb.h>
+#include "i2400m-usb.h"
+
+
+#define D_SUBMODULE rx
+#include "usb-debug-levels.h"
+
+/*
+ * Dynamic RX size
+ *
+ * We can't let the rx_size be a multiple of 512 bytes (the RX
+ * endpoint's max packet size). On some USB host controllers (we
+ * haven't been able to fully characterize which), if the device is
+ * about to send (for example) X bytes and we only post a buffer to
+ * receive n*512, it will fail to mark that as babble (so that
+ * i2400mu_rx() [case -EOVERFLOW] can resize the buffer and get the
+ * rest).
+ *
+ * So on growing or shrinking, if it is a multiple of the
+ * maxpacketsize, we remove some (instead of incresing some, so in a
+ * buddy allocator we try to waste less space).
+ *
+ * Note we also need a hook for this on i2400mu_rx() -- when we do the
+ * first read, we are sure we won't hit this spot because
+ * i240mm->rx_size has been set properly. However, if we have to
+ * double because of -EOVERFLOW, when we launch the read to get the
+ * rest of the data, we *have* to make sure that also is not a
+ * multiple of the max_pkt_size.
+ */
+
+static
+size_t i2400mu_rx_size_grow(struct i2400mu *i2400mu)
+{
+ struct device *dev = &i2400mu->usb_iface->dev;
+ size_t rx_size;
+ const size_t max_pkt_size = 512;
+
+ rx_size = 2 * i2400mu->rx_size;
+ if (rx_size % max_pkt_size == 0) {
+ rx_size -= 8;
+ d_printf(1, dev,
+ "RX: expected size grew to %zu [adjusted -8] "
+ "from %zu\n",
+ rx_size, i2400mu->rx_size);
+ } else
+ d_printf(1, dev,
+ "RX: expected size grew to %zu from %zu\n",
+ rx_size, i2400mu->rx_size);
+ return rx_size;
+}
+
+
+static
+void i2400mu_rx_size_maybe_shrink(struct i2400mu *i2400mu)
+{
+ const size_t max_pkt_size = 512;
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ if (unlikely(i2400mu->rx_size_cnt >= 100
+ && i2400mu->rx_size_auto_shrink)) {
+ size_t avg_rx_size =
+ i2400mu->rx_size_acc / i2400mu->rx_size_cnt;
+ size_t new_rx_size = i2400mu->rx_size / 2;
+ if (avg_rx_size < new_rx_size) {
+ if (new_rx_size % max_pkt_size == 0) {
+ new_rx_size -= 8;
+ d_printf(1, dev,
+ "RX: expected size shrank to %zu "
+ "[adjusted -8] from %zu\n",
+ new_rx_size, i2400mu->rx_size);
+ } else
+ d_printf(1, dev,
+ "RX: expected size shrank to %zu "
+ "from %zu\n",
+ new_rx_size, i2400mu->rx_size);
+ i2400mu->rx_size = new_rx_size;
+ i2400mu->rx_size_cnt = 0;
+ i2400mu->rx_size_acc = i2400mu->rx_size;
+ }
+ }
+}
+
+/*
+ * Receive a message with payloads from the USB bus into an skb
+ *
+ * @i2400mu: USB device descriptor
+ * @rx_skb: skb where to place the received message
+ *
+ * Deals with all the USB-specifics of receiving, dynamically
+ * increasing the buffer size if so needed. Returns the payload in the
+ * skb, ready to process. On a zero-length packet, we retry.
+ *
+ * On soft USB errors, we retry (until they become too frequent and
+ * then are promoted to hard); on hard USB errors, we reset the
+ * device. On other errors (skb realloacation, we just drop it and
+ * hope for the next invocation to solve it).
+ *
+ * Returns: pointer to the skb if ok, ERR_PTR on error.
+ * NOTE: this function might realloc the skb (if it is too small),
+ * so always update with the one returned.
+ * ERR_PTR() is < 0 on error.
+ */
+static
+struct sk_buff *i2400mu_rx(struct i2400mu *i2400mu, struct sk_buff *rx_skb)
+{
+ int result = 0;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ int usb_pipe, read_size, rx_size, do_autopm;
+ struct usb_endpoint_descriptor *epd;
+ const size_t max_pkt_size = 512;
+
+ d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+ do_autopm = atomic_read(&i2400mu->do_autopm);
+ result = do_autopm ?
+ usb_autopm_get_interface(i2400mu->usb_iface) : 0;
+ if (result < 0) {
+ dev_err(dev, "RX: can't get autopm: %d\n", result);
+ do_autopm = 0;
+ }
+ epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_IN);
+ usb_pipe = usb_rcvbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+retry:
+ rx_size = skb_end_pointer(rx_skb) - rx_skb->data - rx_skb->len;
+ if (unlikely(rx_size % max_pkt_size == 0)) {
+ rx_size -= 8;
+ d_printf(1, dev, "RX: rx_size adapted to %d [-8]\n", rx_size);
+ }
+ result = usb_bulk_msg(
+ i2400mu->usb_dev, usb_pipe, rx_skb->data + rx_skb->len,
+ rx_size, &read_size, HZ);
+ usb_mark_last_busy(i2400mu->usb_dev);
+ switch (result) {
+ case 0:
+ if (read_size == 0)
+ goto retry; /* ZLP, just resubmit */
+ skb_put(rx_skb, read_size);
+ break;
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* just ignore it */
+ case -ESHUTDOWN:
+ case -ECONNRESET:
+ break;
+ case -EOVERFLOW: { /* too small, reallocate */
+ struct sk_buff *new_skb;
+ rx_size = i2400mu_rx_size_grow(i2400mu);
+ if (rx_size <= (1 << 16)) /* cap it */
+ i2400mu->rx_size = rx_size;
+ else if (printk_ratelimit()) {
+ dev_err(dev, "BUG? rx_size up to %d\n", rx_size);
+ result = -EINVAL;
+ goto out;
+ }
+ skb_put(rx_skb, read_size);
+ new_skb = skb_copy_expand(rx_skb, 0, rx_size - rx_skb->len,
+ GFP_KERNEL);
+ if (new_skb == NULL) {
+ if (printk_ratelimit())
+ dev_err(dev, "RX: Can't reallocate skb to %d; "
+ "RX dropped\n", rx_size);
+ kfree(rx_skb);
+ result = 0;
+ goto out; /* drop it...*/
+ }
+ kfree_skb(rx_skb);
+ rx_skb = new_skb;
+ i2400mu->rx_size_cnt = 0;
+ i2400mu->rx_size_acc = i2400mu->rx_size;
+ d_printf(1, dev, "RX: size changed to %d, received %d, "
+ "copied %d, capacity %ld\n",
+ rx_size, read_size, rx_skb->len,
+ (long) (skb_end_pointer(new_skb) - new_skb->head));
+ goto retry;
+ }
+ /* In most cases, it happens due to the hardware scheduling a
+ * read when there was no data - unfortunately, we have no way
+ * to tell this timeout from a USB timeout. So we just ignore
+ * it. */
+ case -ETIMEDOUT:
+ dev_err(dev, "RX: timeout: %d\n", result);
+ result = 0;
+ break;
+ default: /* Any error */
+ if (edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME))
+ goto error_reset;
+ dev_err(dev, "RX: error receiving URB: %d, retrying\n", result);
+ goto retry;
+ }
+out:
+ if (do_autopm)
+ usb_autopm_put_interface(i2400mu->usb_iface);
+ d_fnend(4, dev, "(i2400mu %p) = %p\n", i2400mu, rx_skb);
+ return rx_skb;
+
+error_reset:
+ dev_err(dev, "RX: maximum errors in URB exceeded; "
+ "resetting device\n");
+ usb_queue_reset_device(i2400mu->usb_iface);
+ rx_skb = ERR_PTR(result);
+ goto out;
+}
+
+
+/*
+ * Kernel thread for USB reception of data
+ *
+ * This thread waits for a kick; once kicked, it will allocate an skb
+ * and receive a single message to it from USB (using
+ * i2400mu_rx()). Once received, it is passed to the generic i2400m RX
+ * code for processing.
+ *
+ * When done processing, it runs some dirty statistics to verify if
+ * the last 100 messages received were smaller than half of the
+ * current RX buffer size. In that case, the RX buffer size is
+ * halved. This will helps lowering the pressure on the memory
+ * allocator.
+ *
+ * Hard errors force the thread to exit.
+ */
+static
+int i2400mu_rxd(void *_i2400mu)
+{
+ int result = 0;
+ struct i2400mu *i2400mu = _i2400mu;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+ size_t pending;
+ int rx_size;
+ struct sk_buff *rx_skb;
+
+ d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+ while (1) {
+ d_printf(2, dev, "TX: waiting for messages\n");
+ pending = 0;
+ wait_event_interruptible(
+ i2400mu->rx_wq,
+ (kthread_should_stop() /* check this first! */
+ || (pending = atomic_read(&i2400mu->rx_pending_count)))
+ );
+ if (kthread_should_stop())
+ break;
+ if (pending == 0)
+ continue;
+ rx_size = i2400mu->rx_size;
+ d_printf(2, dev, "RX: reading up to %d bytes\n", rx_size);
+ rx_skb = __netdev_alloc_skb(net_dev, rx_size, GFP_KERNEL);
+ if (rx_skb == NULL) {
+ dev_err(dev, "RX: can't allocate skb [%d bytes]\n",
+ rx_size);
+ msleep(50); /* give it some time? */
+ continue;
+ }
+
+ /* Receive the message with the payloads */
+ rx_skb = i2400mu_rx(i2400mu, rx_skb);
+ result = PTR_ERR(rx_skb);
+ if (IS_ERR(rx_skb))
+ goto out;
+ atomic_dec(&i2400mu->rx_pending_count);
+ if (rx_skb->len == 0) { /* some ignorable condition */
+ kfree_skb(rx_skb);
+ continue;
+ }
+
+ /* Deliver the message to the generic i2400m code */
+ i2400mu->rx_size_cnt++;
+ i2400mu->rx_size_acc += rx_skb->len;
+ result = i2400m_rx(i2400m, rx_skb);
+ if (result == -EIO
+ && edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+ goto error_reset;
+ }
+
+ /* Maybe adjust RX buffer size */
+ i2400mu_rx_size_maybe_shrink(i2400mu);
+ }
+ result = 0;
+out:
+ d_fnend(4, dev, "(i2400mu %p) = %d\n", i2400mu, result);
+ return result;
+
+error_reset:
+ dev_err(dev, "RX: maximum errors in received buffer exceeded; "
+ "resetting device\n");
+ usb_queue_reset_device(i2400mu->usb_iface);
+ goto out;
+}
+
+
+/*
+ * Start reading from the device
+ *
+ * @i2400m: device instance
+ *
+ * Notify the RX thread that there is data pending.
+ */
+void i2400mu_rx_kick(struct i2400mu *i2400mu)
+{
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(3, dev, "(i2400mu %p)\n", i2400m);
+ atomic_inc(&i2400mu->rx_pending_count);
+ wake_up_all(&i2400mu->rx_wq);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+
+
+int i2400mu_rx_setup(struct i2400mu *i2400mu)
+{
+ int result = 0;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+
+ i2400mu->rx_kthread = kthread_run(i2400mu_rxd, i2400mu, "%s-rx",
+ wimax_dev->name);
+ if (IS_ERR(i2400mu->rx_kthread)) {
+ result = PTR_ERR(i2400mu->rx_kthread);
+ dev_err(dev, "RX: cannot start thread: %d\n", result);
+ }
+ return result;
+}
+
+void i2400mu_rx_release(struct i2400mu *i2400mu)
+{
+ kthread_stop(i2400mu->rx_kthread);
+}
+
diff --git a/drivers/net/wimax/i2400m/usb-tx.c b/drivers/net/wimax/i2400m/usb-tx.c
new file mode 100644
index 000000000000..dfd893356f49
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb-tx.c
@@ -0,0 +1,229 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * USB specific TX handling
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Intel Corporation <linux-wimax@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ * - Initial implementation
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * - Split transport/device specific
+ *
+ *
+ * Takes the TX messages in the i2400m's driver TX FIFO and sends them
+ * to the device until there are no more.
+ *
+ * If we fail sending the message, we just drop it. There isn't much
+ * we can do at this point. We could also retry, but the USB stack has
+ * already retried and still failed, so there is not much of a
+ * point. As well, most of the traffic is network, which has recovery
+ * methods for dropped packets.
+ *
+ * For sending we just obtain a FIFO buffer to send, send it to the
+ * USB bulk out, tell the TX FIFO code we have sent it; query for
+ * another one, etc... until done.
+ *
+ * We use a thread so we can call usb_autopm_enable() and
+ * usb_autopm_disable() for each transaction; this way when the device
+ * goes idle, it will suspend. It also has less overhead than a
+ * dedicated workqueue, as it is being used for a single task.
+ *
+ * ROADMAP
+ *
+ * i2400mu_tx_setup()
+ * i2400mu_tx_release()
+ *
+ * i2400mu_bus_tx_kick() - Called by the tx.c code when there
+ * is new data in the FIFO.
+ * i2400mu_txd()
+ * i2400m_tx_msg_get()
+ * i2400m_tx_msg_sent()
+ */
+#include "i2400m-usb.h"
+
+
+#define D_SUBMODULE tx
+#include "usb-debug-levels.h"
+
+
+/*
+ * Get the next TX message in the TX FIFO and send it to the device
+ *
+ * Note that any iteration consumes a message to be sent, no matter if
+ * it succeeds or fails (we have no real way to retry or complain).
+ *
+ * Return: 0 if ok, < 0 errno code on hard error.
+ */
+static
+int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
+ size_t tx_msg_size)
+{
+ int result = 0;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ int usb_pipe, sent_size, do_autopm;
+ struct usb_endpoint_descriptor *epd;
+
+ d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+ do_autopm = atomic_read(&i2400mu->do_autopm);
+ result = do_autopm ?
+ usb_autopm_get_interface(i2400mu->usb_iface) : 0;
+ if (result < 0) {
+ dev_err(dev, "TX: can't get autopm: %d\n", result);
+ do_autopm = 0;
+ }
+ epd = usb_get_epd(i2400mu->usb_iface, I2400MU_EP_BULK_OUT);
+ usb_pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+retry:
+ result = usb_bulk_msg(i2400mu->usb_dev, usb_pipe,
+ tx_msg, tx_msg_size, &sent_size, HZ);
+ usb_mark_last_busy(i2400mu->usb_dev);
+ switch (result) {
+ case 0:
+ if (sent_size != tx_msg_size) { /* Too short? drop it */
+ dev_err(dev, "TX: short write (%d B vs %zu "
+ "expected)\n", sent_size, tx_msg_size);
+ result = -EIO;
+ }
+ break;
+ case -EINVAL: /* while removing driver */
+ case -ENODEV: /* dev disconnect ... */
+ case -ENOENT: /* just ignore it */
+ case -ESHUTDOWN: /* and exit */
+ case -ECONNRESET:
+ result = -ESHUTDOWN;
+ break;
+ default: /* Some error? */
+ if (edc_inc(&i2400mu->urb_edc,
+ EDC_MAX_ERRORS, EDC_ERROR_TIMEFRAME)) {
+ dev_err(dev, "TX: maximum errors in URB "
+ "exceeded; resetting device\n");
+ usb_queue_reset_device(i2400mu->usb_iface);
+ } else {
+ dev_err(dev, "TX: cannot send URB; retrying. "
+ "tx_msg @%zu %zu B [%d sent]: %d\n",
+ (void *) tx_msg - i2400m->tx_buf,
+ tx_msg_size, sent_size, result);
+ goto retry;
+ }
+ }
+ if (do_autopm)
+ usb_autopm_put_interface(i2400mu->usb_iface);
+ d_fnend(4, dev, "(i2400mu %p) = result\n", i2400mu);
+ return result;
+}
+
+
+/*
+ * Get the next TX message in the TX FIFO and send it to the device
+ *
+ * Note we exit the loop if i2400mu_tx() fails; that funtion only
+ * fails on hard error (failing to tx a buffer not being one of them,
+ * see its doc).
+ *
+ * Return: 0
+ */
+static
+int i2400mu_txd(void *_i2400mu)
+{
+ int result = 0;
+ struct i2400mu *i2400mu = _i2400mu;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct i2400m_msg_hdr *tx_msg;
+ size_t tx_msg_size;
+
+ d_fnstart(4, dev, "(i2400mu %p)\n", i2400mu);
+
+ while (1) {
+ d_printf(2, dev, "TX: waiting for messages\n");
+ tx_msg = NULL;
+ wait_event_interruptible(
+ i2400mu->tx_wq,
+ (kthread_should_stop() /* check this first! */
+ || (tx_msg = i2400m_tx_msg_get(i2400m, &tx_msg_size)))
+ );
+ if (kthread_should_stop())
+ break;
+ WARN_ON(tx_msg == NULL); /* should not happen...*/
+ d_printf(2, dev, "TX: submitting %zu bytes\n", tx_msg_size);
+ d_dump(5, dev, tx_msg, tx_msg_size);
+ /* Yeah, we ignore errors ... not much we can do */
+ i2400mu_tx(i2400mu, tx_msg, tx_msg_size);
+ i2400m_tx_msg_sent(i2400m); /* ack it, advance the FIFO */
+ if (result < 0)
+ break;
+ }
+ d_fnend(4, dev, "(i2400mu %p) = %d\n", i2400mu, result);
+ return result;
+}
+
+
+/*
+ * i2400m TX engine notifies us that there is data in the FIFO ready
+ * for TX
+ *
+ * If there is a URB in flight, don't do anything; when it finishes,
+ * it will see there is data in the FIFO and send it. Else, just
+ * submit a write.
+ */
+void i2400mu_bus_tx_kick(struct i2400m *i2400m)
+{
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(3, dev, "(i2400m %p) = void\n", i2400m);
+ wake_up_all(&i2400mu->tx_wq);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+
+
+int i2400mu_tx_setup(struct i2400mu *i2400mu)
+{
+ int result = 0;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct wimax_dev *wimax_dev = &i2400m->wimax_dev;
+
+ i2400mu->tx_kthread = kthread_run(i2400mu_txd, i2400mu, "%s-tx",
+ wimax_dev->name);
+ if (IS_ERR(i2400mu->tx_kthread)) {
+ result = PTR_ERR(i2400mu->tx_kthread);
+ dev_err(dev, "TX: cannot start thread: %d\n", result);
+ }
+ return result;
+}
+
+void i2400mu_tx_release(struct i2400mu *i2400mu)
+{
+ kthread_stop(i2400mu->tx_kthread);
+}
diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c
new file mode 100644
index 000000000000..6d4b65fd9c17
--- /dev/null
+++ b/drivers/net/wimax/i2400m/usb.c
@@ -0,0 +1,591 @@
+/*
+ * Intel Wireless WiMAX Connection 2400m
+ * Linux driver model glue for USB device, reset & fw upload
+ *
+ *
+ * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ * Yanir Lubetkin <yanirx.lubetkin@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ *
+ *
+ * See i2400m-usb.h for a general description of this driver.
+ *
+ * This file implements driver model glue, and hook ups for the
+ * generic driver to implement the bus-specific functions (device
+ * communication setup/tear down, firmware upload and resetting).
+ *
+ * ROADMAP
+ *
+ * i2400mu_probe()
+ * alloc_netdev()...
+ * i2400mu_netdev_setup()
+ * i2400mu_init()
+ * i2400m_netdev_setup()
+ * i2400m_setup()...
+ *
+ * i2400mu_disconnect
+ * i2400m_release()
+ * free_netdev()
+ *
+ * i2400mu_suspend()
+ * i2400m_cmd_enter_powersave()
+ * i2400mu_notification_release()
+ *
+ * i2400mu_resume()
+ * i2400mu_notification_setup()
+ *
+ * i2400mu_bus_dev_start() Called by i2400m_dev_start() [who is
+ * i2400mu_tx_setup() called by i2400m_setup()]
+ * i2400mu_rx_setup()
+ * i2400mu_notification_setup()
+ *
+ * i2400mu_bus_dev_stop() Called by i2400m_dev_stop() [who is
+ * i2400mu_notification_release() called by i2400m_release()]
+ * i2400mu_rx_release()
+ * i2400mu_tx_release()
+ *
+ * i2400mu_bus_reset() Called by i2400m->bus_reset
+ * __i2400mu_reset()
+ * __i2400mu_send_barker()
+ * usb_reset_device()
+ */
+#include "i2400m-usb.h"
+#include <linux/wimax/i2400m.h>
+#include <linux/debugfs.h>
+
+
+#define D_SUBMODULE usb
+#include "usb-debug-levels.h"
+
+
+/* Our firmware file name */
+#define I2400MU_FW_FILE_NAME "i2400m-fw-usb-" I2400M_FW_VERSION ".sbcf"
+
+static
+int i2400mu_bus_dev_start(struct i2400m *i2400m)
+{
+ int result;
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ result = i2400mu_tx_setup(i2400mu);
+ if (result < 0)
+ goto error_usb_tx_setup;
+ result = i2400mu_rx_setup(i2400mu);
+ if (result < 0)
+ goto error_usb_rx_setup;
+ result = i2400mu_notification_setup(i2400mu);
+ if (result < 0)
+ goto error_notif_setup;
+ d_fnend(3, dev, "(i2400m %p) = %d\n", i2400m, result);
+ return result;
+
+error_notif_setup:
+ i2400mu_rx_release(i2400mu);
+error_usb_rx_setup:
+ i2400mu_tx_release(i2400mu);
+error_usb_tx_setup:
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+ return result;
+}
+
+
+static
+void i2400mu_bus_dev_stop(struct i2400m *i2400m)
+{
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ struct device *dev = &i2400mu->usb_iface->dev;
+
+ d_fnstart(3, dev, "(i2400m %p)\n", i2400m);
+ i2400mu_notification_release(i2400mu);
+ i2400mu_rx_release(i2400mu);
+ i2400mu_tx_release(i2400mu);
+ d_fnend(3, dev, "(i2400m %p) = void\n", i2400m);
+}
+
+
+/*
+ * Sends a barker buffer to the device
+ *
+ * This helper will allocate a kmalloced buffer and use it to transmit
+ * (then free it). Reason for this is that other arches cannot use
+ * stack/vmalloc/text areas for DMA transfers.
+ *
+ * Error recovery here is simpler: anything is considered a hard error
+ * and will move the reset code to use a last-resort bus-based reset.
+ */
+static
+int __i2400mu_send_barker(struct i2400mu *i2400mu,
+ const __le32 *barker,
+ size_t barker_size,
+ unsigned endpoint)
+{
+ struct usb_endpoint_descriptor *epd = NULL;
+ int pipe, actual_len, ret;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ void *buffer;
+ int do_autopm = 1;
+
+ ret = usb_autopm_get_interface(i2400mu->usb_iface);
+ if (ret < 0) {
+ dev_err(dev, "RESET: can't get autopm: %d\n", ret);
+ do_autopm = 0;
+ }
+ ret = -ENOMEM;
+ buffer = kmalloc(barker_size, GFP_KERNEL);
+ if (buffer == NULL)
+ goto error_kzalloc;
+ epd = usb_get_epd(i2400mu->usb_iface, endpoint);
+ pipe = usb_sndbulkpipe(i2400mu->usb_dev, epd->bEndpointAddress);
+ memcpy(buffer, barker, barker_size);
+ ret = usb_bulk_msg(i2400mu->usb_dev, pipe, buffer, barker_size,
+ &actual_len, HZ);
+ if (ret < 0) {
+ if (ret != -EINVAL)
+ dev_err(dev, "E: barker error: %d\n", ret);
+ } else if (actual_len != barker_size) {
+ dev_err(dev, "E: only %d bytes transmitted\n", actual_len);
+ ret = -EIO;
+ }
+ kfree(buffer);
+error_kzalloc:
+ if (do_autopm)
+ usb_autopm_put_interface(i2400mu->usb_iface);
+ return ret;
+}
+
+
+/*
+ * Reset a device at different levels (warm, cold or bus)
+ *
+ * @i2400m: device descriptor
+ * @reset_type: soft, warm or bus reset (I2400M_RT_WARM/SOFT/BUS)
+ *
+ * Warm and cold resets get a USB reset if they fail.
+ *
+ * Warm reset:
+ *
+ * The device will be fully reset internally, but won't be
+ * disconnected from the USB bus (so no reenumeration will
+ * happen). Firmware upload will be neccessary.
+ *
+ * The device will send a reboot barker in the notification endpoint
+ * that will trigger the driver to reinitialize the state
+ * automatically from notif.c:i2400m_notification_grok() into
+ * i2400m_dev_bootstrap_delayed().
+ *
+ * Cold and bus (USB) reset:
+ *
+ * The device will be fully reset internally, disconnected from the
+ * USB bus an a reenumeration will happen. Firmware upload will be
+ * neccessary. Thus, we don't do any locking or struct
+ * reinitialization, as we are going to be fully disconnected and
+ * reenumerated.
+ *
+ * Note we need to return -ENODEV if a warm reset was requested and we
+ * had to resort to a bus reset. See i2400m_op_reset(), wimax_reset()
+ * and wimax_dev->op_reset.
+ *
+ * WARNING: no driver state saved/fixed
+ */
+static
+int i2400mu_bus_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
+{
+ int result;
+ struct i2400mu *i2400mu =
+ container_of(i2400m, struct i2400mu, i2400m);
+ struct device *dev = i2400m_dev(i2400m);
+ static const __le32 i2400m_WARM_BOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_WARM_RESET_BARKER),
+ };
+ static const __le32 i2400m_COLD_BOOT_BARKER[4] = {
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ __constant_cpu_to_le32(I2400M_COLD_RESET_BARKER),
+ };
+
+ d_fnstart(3, dev, "(i2400m %p rt %u)\n", i2400m, rt);
+ if (rt == I2400M_RT_WARM)
+ result = __i2400mu_send_barker(i2400mu, i2400m_WARM_BOOT_BARKER,
+ sizeof(i2400m_WARM_BOOT_BARKER),
+ I2400MU_EP_BULK_OUT);
+ else if (rt == I2400M_RT_COLD)
+ result = __i2400mu_send_barker(i2400mu, i2400m_COLD_BOOT_BARKER,
+ sizeof(i2400m_COLD_BOOT_BARKER),
+ I2400MU_EP_RESET_COLD);
+ else if (rt == I2400M_RT_BUS) {
+do_bus_reset:
+ result = usb_reset_device(i2400mu->usb_dev);
+ switch (result) {
+ case 0:
+ case -EINVAL: /* device is gone */
+ case -ENODEV:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ result = rt == I2400M_RT_WARM ? -ENODEV : 0;
+ break; /* We assume the device is disconnected */
+ default:
+ dev_err(dev, "USB reset failed (%d), giving up!\n",
+ result);
+ }
+ } else
+ BUG();
+ if (result < 0
+ && result != -EINVAL /* device is gone */
+ && rt != I2400M_RT_BUS) {
+ dev_err(dev, "%s reset failed (%d); trying USB reset\n",
+ rt == I2400M_RT_WARM ? "warm" : "cold", result);
+ rt = I2400M_RT_BUS;
+ goto do_bus_reset;
+ }
+ d_fnend(3, dev, "(i2400m %p rt %u) = %d\n", i2400m, rt, result);
+ return result;
+}
+
+
+static
+void i2400mu_netdev_setup(struct net_device *net_dev)
+{
+ struct i2400m *i2400m = net_dev_to_i2400m(net_dev);
+ struct i2400mu *i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ i2400mu_init(i2400mu);
+ i2400m_netdev_setup(net_dev);
+}
+
+
+/*
+ * Debug levels control; see debug.h
+ */
+struct d_level D_LEVEL[] = {
+ D_SUBMODULE_DEFINE(usb),
+ D_SUBMODULE_DEFINE(fw),
+ D_SUBMODULE_DEFINE(notif),
+ D_SUBMODULE_DEFINE(rx),
+ D_SUBMODULE_DEFINE(tx),
+};
+size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);
+
+
+#define __debugfs_register(prefix, name, parent) \
+do { \
+ result = d_level_register_debugfs(prefix, name, parent); \
+ if (result < 0) \
+ goto error; \
+} while (0)
+
+
+static
+int i2400mu_debugfs_add(struct i2400mu *i2400mu)
+{
+ int result;
+ struct device *dev = &i2400mu->usb_iface->dev;
+ struct dentry *dentry = i2400mu->i2400m.wimax_dev.debugfs_dentry;
+ struct dentry *fd;
+
+ dentry = debugfs_create_dir("i2400m-usb", dentry);
+ result = PTR_ERR(dentry);
+ if (IS_ERR(dentry)) {
+ if (result == -ENODEV)
+ result = 0; /* No debugfs support */
+ goto error;
+ }
+ i2400mu->debugfs_dentry = dentry;
+ __debugfs_register("dl_", usb, dentry);
+ __debugfs_register("dl_", fw, dentry);
+ __debugfs_register("dl_", notif, dentry);
+ __debugfs_register("dl_", rx, dentry);
+ __debugfs_register("dl_", tx, dentry);
+
+ /* Don't touch these if you don't know what you are doing */
+ fd = debugfs_create_u8("rx_size_auto_shrink", 0600, dentry,
+ &i2400mu->rx_size_auto_shrink);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "rx_size_auto_shrink: %d\n", result);
+ goto error;
+ }
+
+ fd = debugfs_create_size_t("rx_size", 0600, dentry,
+ &i2400mu->rx_size);
+ result = PTR_ERR(fd);
+ if (IS_ERR(fd) && result != -ENODEV) {
+ dev_err(dev, "Can't create debugfs entry "
+ "rx_size: %d\n", result);
+ goto error;
+ }
+
+ return 0;
+
+error:
+ debugfs_remove_recursive(i2400mu->debugfs_dentry);
+ return result;
+}
+
+
+/*
+ * Probe a i2400m interface and register it
+ *
+ * @iface: USB interface to link to
+ * @id: USB class/subclass/protocol id
+ * @returns: 0 if ok, < 0 errno code on error.
+ *
+ * Alloc a net device, initialize the bus-specific details and then
+ * calls the bus-generic initialization routine. That will register
+ * the wimax and netdev devices, upload the firmware [using
+ * _bus_bm_*()], call _bus_dev_start() to finalize the setup of the
+ * communication with the device and then will start to talk to it to
+ * finnish setting it up.
+ */
+static
+int i2400mu_probe(struct usb_interface *iface,
+ const struct usb_device_id *id)
+{
+ int result;
+ struct net_device *net_dev;
+ struct device *dev = &iface->dev;
+ struct i2400m *i2400m;
+ struct i2400mu *i2400mu;
+ struct usb_device *usb_dev = interface_to_usbdev(iface);
+
+ if (usb_dev->speed != USB_SPEED_HIGH)
+ dev_err(dev, "device not connected as high speed\n");
+
+ /* Allocate instance [calls i2400m_netdev_setup() on it]. */
+ result = -ENOMEM;
+ net_dev = alloc_netdev(sizeof(*i2400mu), "wmx%d",
+ i2400mu_netdev_setup);
+ if (net_dev == NULL) {
+ dev_err(dev, "no memory for network device instance\n");
+ goto error_alloc_netdev;
+ }
+ SET_NETDEV_DEV(net_dev, dev);
+ i2400m = net_dev_to_i2400m(net_dev);
+ i2400mu = container_of(i2400m, struct i2400mu, i2400m);
+ i2400m->wimax_dev.net_dev = net_dev;
+ i2400mu->usb_dev = usb_get_dev(usb_dev);
+ i2400mu->usb_iface = iface;
+ usb_set_intfdata(iface, i2400mu);
+
+ i2400m->bus_tx_block_size = I2400MU_BLK_SIZE;
+ i2400m->bus_pl_size_max = I2400MU_PL_SIZE_MAX;
+ i2400m->bus_dev_start = i2400mu_bus_dev_start;
+ i2400m->bus_dev_stop = i2400mu_bus_dev_stop;
+ i2400m->bus_tx_kick = i2400mu_bus_tx_kick;
+ i2400m->bus_reset = i2400mu_bus_reset;
+ i2400m->bus_bm_cmd_send = i2400mu_bus_bm_cmd_send;
+ i2400m->bus_bm_wait_for_ack = i2400mu_bus_bm_wait_for_ack;
+ i2400m->bus_fw_name = I2400MU_FW_FILE_NAME;
+ i2400m->bus_bm_mac_addr_impaired = 0;
+
+ iface->needs_remote_wakeup = 1; /* autosuspend (15s delay) */
+ device_init_wakeup(dev, 1);
+ usb_autopm_enable(i2400mu->usb_iface);
+ usb_dev->autosuspend_delay = 15 * HZ;
+ usb_dev->autosuspend_disabled = 0;
+
+ result = i2400m_setup(i2400m, I2400M_BRI_MAC_REINIT);
+ if (result < 0) {
+ dev_err(dev, "cannot setup device: %d\n", result);
+ goto error_setup;
+ }
+ result = i2400mu_debugfs_add(i2400mu);
+ if (result < 0) {
+ dev_err(dev, "Can't register i2400mu's debugfs: %d\n", result);
+ goto error_debugfs_add;
+ }
+ return 0;
+
+error_debugfs_add:
+ i2400m_release(i2400m);
+error_setup:
+ usb_set_intfdata(iface, NULL);
+ usb_put_dev(i2400mu->usb_dev);
+ free_netdev(net_dev);
+error_alloc_netdev:
+ return result;
+}
+
+
+/*
+ * Disconect a i2400m from the system.
+ *
+ * i2400m_stop() has been called before, so al the rx and tx contexts
+ * have been taken down already. Make sure the queue is stopped,
+ * unregister netdev and i2400m, free and kill.
+ */
+static
+void i2400mu_disconnect(struct usb_interface *iface)
+{
+ struct i2400mu *i2400mu = usb_get_intfdata(iface);
+ struct i2400m *i2400m = &i2400mu->i2400m;
+ struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+ struct device *dev = &iface->dev;
+
+ d_fnstart(3, dev, "(iface %p i2400m %p)\n", iface, i2400m);
+
+ debugfs_remove_recursive(i2400mu->debugfs_dentry);
+ i2400m_release(i2400m);
+ usb_set_intfdata(iface, NULL);
+ usb_put_dev(i2400mu->usb_dev);
+ free_netdev(net_dev);
+ d_fnend(3, dev, "(iface %p i2400m %p) = void\n", iface, i2400m);
+}
+
+
+/*
+ * Get the device ready for USB port or system standby and hibernation
+ *
+ * USB port and system standby are handled the same.
+ *
+ * When the system hibernates, the USB device is powered down and then
+ * up, so we don't really have to do much here, as it will be seen as
+ * a reconnect. Still for simplicity we consider this case the same as
+ * suspend, so that the device has a chance to do notify the base
+ * station (if connected).
+ *
+ * So at the end, the three cases require common handling.
+ *
+ * If at the time of this call the device's firmware is not loaded,
+ * nothing has to be done.
+ *
+ * If the firmware is loaded, we need to:
+ *
+ * - tell the device to go into host interface power save mode, wait
+ * for it to ack
+ *
+ * This is quite more interesting than it is; we need to execute a
+ * command, but this time, we don't want the code in usb-{tx,rx}.c
+ * to call the usb_autopm_get/put_interface() barriers as it'd
+ * deadlock, so we need to decrement i2400mu->do_autopm, that acts
+ * as a poor man's semaphore. Ugly, but it works.
+ *
+ * As well, the device might refuse going to sleep for whichever
+ * reason. In this case we just fail. For system suspend/hibernate,
+ * we *can't* fail. We look at usb_dev->auto_pm to see if the
+ * suspend call comes from the USB stack or from the system and act
+ * in consequence.
+ *
+ * - stop the notification endpoint polling
+ */
+static
+int i2400mu_suspend(struct usb_interface *iface, pm_message_t pm_msg)
+{
+ int result = 0;
+ struct device *dev = &iface->dev;
+ struct i2400mu *i2400mu = usb_get_intfdata(iface);
+ struct usb_device *usb_dev = i2400mu->usb_dev;
+ struct i2400m *i2400m = &i2400mu->i2400m;
+
+ d_fnstart(3, dev, "(iface %p pm_msg %u)\n", iface, pm_msg.event);
+ if (i2400m->updown == 0)
+ goto no_firmware;
+ d_printf(1, dev, "fw up, requesting standby\n");
+ atomic_dec(&i2400mu->do_autopm);
+ result = i2400m_cmd_enter_powersave(i2400m);
+ atomic_inc(&i2400mu->do_autopm);
+ if (result < 0 && usb_dev->auto_pm == 0) {
+ /* System suspend, can't fail */
+ dev_err(dev, "failed to suspend, will reset on resume\n");
+ result = 0;
+ }
+ if (result < 0)
+ goto error_enter_powersave;
+ i2400mu_notification_release(i2400mu);
+ d_printf(1, dev, "fw up, got standby\n");
+error_enter_powersave:
+no_firmware:
+ d_fnend(3, dev, "(iface %p pm_msg %u) = %d\n",
+ iface, pm_msg.event, result);
+ return result;
+}
+
+
+static
+int i2400mu_resume(struct usb_interface *iface)
+{
+ int ret = 0;
+ struct device *dev = &iface->dev;
+ struct i2400mu *i2400mu = usb_get_intfdata(iface);
+ struct i2400m *i2400m = &i2400mu->i2400m;
+
+ d_fnstart(3, dev, "(iface %p)\n", iface);
+ if (i2400m->updown == 0) {
+ d_printf(1, dev, "fw was down, no resume neeed\n");
+ goto out;
+ }
+ d_printf(1, dev, "fw was up, resuming\n");
+ i2400mu_notification_setup(i2400mu);
+ /* USB has flow control, so we don't need to give it time to
+ * come back; otherwise, we'd use something like a get-state
+ * command... */
+out:
+ d_fnend(3, dev, "(iface %p) = %d\n", iface, ret);
+ return ret;
+}
+
+
+static
+struct usb_device_id i2400mu_id_table[] = {
+ { USB_DEVICE(0x8086, 0x0181) },
+ { USB_DEVICE(0x8086, 0x1403) },
+ { USB_DEVICE(0x8086, 0x1405) },
+ { USB_DEVICE(0x8086, 0x0180) },
+ { USB_DEVICE(0x8086, 0x0182) },
+ { USB_DEVICE(0x8086, 0x1406) },
+ { USB_DEVICE(0x8086, 0x1403) },
+ { },
+};
+MODULE_DEVICE_TABLE(usb, i2400mu_id_table);
+
+
+static
+struct usb_driver i2400mu_driver = {
+ .name = KBUILD_MODNAME,
+ .suspend = i2400mu_suspend,
+ .resume = i2400mu_resume,
+ .probe = i2400mu_probe,
+ .disconnect = i2400mu_disconnect,
+ .id_table = i2400mu_id_table,
+ .supports_autosuspend = 1,
+};
+
+static
+int __init i2400mu_driver_init(void)
+{
+ return usb_register(&i2400mu_driver);
+}
+module_init(i2400mu_driver_init);
+
+
+static
+void __exit i2400mu_driver_exit(void)
+{
+ flush_scheduled_work(); /* for the stuff we schedule from sysfs.c */
+ usb_deregister(&i2400mu_driver);
+}
+module_exit(i2400mu_driver_exit);
+
+MODULE_AUTHOR("Intel Corporation <linux-wimax@intel.com>");
+MODULE_DESCRIPTION("Intel 2400M WiMAX networking for USB");
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE(I2400MU_FW_FILE_NAME);
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 289d81adfb9c..83babb0a1df7 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -150,4 +150,6 @@ source "drivers/usb/atm/Kconfig"
source "drivers/usb/gadget/Kconfig"
+source "drivers/usb/otg/Kconfig"
+
endif # USB_SUPPORT
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index d50a99f70aee..00b47ea24f86 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1275,7 +1275,7 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
struct acm *acm = usb_get_intfdata(intf);
int cnt;
- if (acm->dev->auto_pm) {
+ if (message.event & PM_EVENT_AUTO) {
int b;
spin_lock_irq(&acm->read_lock);
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 5a8ecc045e3f..3771d6e6d0cc 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -764,7 +764,8 @@ static int wdm_suspend(struct usb_interface *intf, pm_message_t message)
mutex_lock(&desc->plock);
#ifdef CONFIG_PM
- if (interface_to_usbdev(desc->intf)->auto_pm && test_bit(WDM_IN_USE, &desc->flags)) {
+ if ((message.event & PM_EVENT_AUTO) &&
+ test_bit(WDM_IN_USE, &desc->flags)) {
rv = -EBUSY;
} else {
#endif
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 43a863c5cc43..0f5c05f6f9df 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -21,6 +21,7 @@
#include <linux/init.h>
#include <linux/module.h>
+#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/kref.h>
@@ -482,7 +483,6 @@ static ssize_t usbtmc_write(struct file *filp, const char __user *buf,
int retval;
int actual;
unsigned long int n_bytes;
- int n;
int remaining;
int done;
int this_part;
@@ -526,11 +526,8 @@ static ssize_t usbtmc_write(struct file *filp, const char __user *buf,
goto exit;
}
- n_bytes = 12 + this_part;
- if (this_part % 4)
- n_bytes += 4 - this_part % 4;
- for (n = 12 + this_part; n < n_bytes; n++)
- buffer[n] = 0;
+ n_bytes = roundup(12 + this_part, 4);
+ memset(buffer + 12 + this_part, 0, n_bytes - (12 + this_part));
retval = usb_bulk_msg(data->usb_dev,
usb_sndbulkpipe(data->usb_dev,
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index aa79280df15d..26fece124e0e 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -981,9 +981,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
return -EINVAL;
if (!uurb->buffer)
return -EINVAL;
- if (uurb->signr != 0 && (uurb->signr < SIGRTMIN ||
- uurb->signr > SIGRTMAX))
- return -EINVAL;
if (!(uurb->type == USBDEVFS_URB_TYPE_CONTROL &&
(uurb->endpoint & ~USB_ENDPOINT_DIR_MASK) == 0)) {
ifnum = findintfep(ps->dev, uurb->endpoint);
@@ -1320,7 +1317,7 @@ static int get_urb32(struct usbdevfs_urb *kurb,
if (__get_user(uptr, &uurb->buffer))
return -EFAULT;
kurb->buffer = compat_ptr(uptr);
- if (__get_user(uptr, &uurb->buffer))
+ if (__get_user(uptr, &uurb->usercontext))
return -EFAULT;
kurb->usercontext = compat_ptr(uptr);
@@ -1401,8 +1398,6 @@ static int proc_disconnectsignal(struct dev_state *ps, void __user *arg)
if (copy_from_user(&ds, arg, sizeof(ds)))
return -EFAULT;
- if (ds.signr != 0 && (ds.signr < SIGRTMIN || ds.signr > SIGRTMAX))
- return -EINVAL;
ps->discsignr = ds.signr;
ps->disccontext = ds.context;
return 0;
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 8c081308b0e2..98760553bc95 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -184,6 +184,20 @@ static int usb_unbind_device(struct device *dev)
return 0;
}
+/*
+ * Cancel any pending scheduled resets
+ *
+ * [see usb_queue_reset_device()]
+ *
+ * Called after unconfiguring / when releasing interfaces. See
+ * comments in __usb_queue_reset_device() regarding
+ * udev->reset_running.
+ */
+static void usb_cancel_queued_reset(struct usb_interface *iface)
+{
+ if (iface->reset_running == 0)
+ cancel_work_sync(&iface->reset_ws);
+}
/* called from driver core with dev locked */
static int usb_probe_interface(struct device *dev)
@@ -242,6 +256,7 @@ static int usb_probe_interface(struct device *dev)
mark_quiesced(intf);
intf->needs_remote_wakeup = 0;
intf->condition = USB_INTERFACE_UNBOUND;
+ usb_cancel_queued_reset(intf);
} else
intf->condition = USB_INTERFACE_BOUND;
@@ -272,6 +287,7 @@ static int usb_unbind_interface(struct device *dev)
usb_disable_interface(udev, intf);
driver->disconnect(intf);
+ usb_cancel_queued_reset(intf);
/* Reset other interface state.
* We cannot do a Set-Interface if the device is suspended or
@@ -279,9 +295,12 @@ static int usb_unbind_interface(struct device *dev)
* altsetting means creating new endpoint device entries).
* When either of these happens, defer the Set-Interface.
*/
- if (intf->cur_altsetting->desc.bAlternateSetting == 0)
- ; /* Already in altsetting 0 so skip Set-Interface */
- else if (!error && intf->dev.power.status == DPM_ON)
+ if (intf->cur_altsetting->desc.bAlternateSetting == 0) {
+ /* Already in altsetting 0 so skip Set-Interface.
+ * Just re-enable it without affecting the endpoint toggles.
+ */
+ usb_enable_interface(udev, intf, false);
+ } else if (!error && intf->dev.power.status == DPM_ON)
usb_set_interface(udev, intf->altsetting[0].
desc.bInterfaceNumber, 0);
else
@@ -380,8 +399,10 @@ void usb_driver_release_interface(struct usb_driver *driver,
if (device_is_registered(dev)) {
iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev);
+ } else {
+ iface->condition = USB_INTERFACE_UNBOUND;
+ usb_cancel_queued_reset(iface);
}
-
dev->driver = NULL;
usb_set_intfdata(iface, NULL);
@@ -904,7 +925,7 @@ static int usb_suspend_device(struct usb_device *udev, pm_message_t msg)
}
/* Caller has locked udev's pm_mutex */
-static int usb_resume_device(struct usb_device *udev)
+static int usb_resume_device(struct usb_device *udev, pm_message_t msg)
{
struct usb_device_driver *udriver;
int status = 0;
@@ -922,7 +943,7 @@ static int usb_resume_device(struct usb_device *udev)
udev->reset_resume = 1;
udriver = to_usb_device_driver(udev->dev.driver);
- status = udriver->resume(udev);
+ status = udriver->resume(udev, msg);
done:
dev_vdbg(&udev->dev, "%s: status %d\n", __func__, status);
@@ -942,7 +963,8 @@ static int usb_suspend_interface(struct usb_device *udev,
if (udev->state == USB_STATE_NOTATTACHED || !is_active(intf))
goto done;
- if (intf->condition == USB_INTERFACE_UNBOUND) /* This can't happen */
+ /* This can happen; see usb_driver_release_interface() */
+ if (intf->condition == USB_INTERFACE_UNBOUND)
goto done;
driver = to_usb_driver(intf->dev.driver);
@@ -950,7 +972,7 @@ static int usb_suspend_interface(struct usb_device *udev,
status = driver->suspend(intf, msg);
if (status == 0)
mark_quiesced(intf);
- else if (!udev->auto_pm)
+ else if (!(msg.event & PM_EVENT_AUTO))
dev_err(&intf->dev, "%s error %d\n",
"suspend", status);
} else {
@@ -968,7 +990,7 @@ static int usb_suspend_interface(struct usb_device *udev,
/* Caller has locked intf's usb_device's pm_mutex */
static int usb_resume_interface(struct usb_device *udev,
- struct usb_interface *intf, int reset_resume)
+ struct usb_interface *intf, pm_message_t msg, int reset_resume)
{
struct usb_driver *driver;
int status = 0;
@@ -1092,7 +1114,7 @@ static int autosuspend_check(struct usb_device *udev, int reschedule)
if (reschedule) {
if (!timer_pending(&udev->autosuspend.timer)) {
queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
- round_jiffies_relative(suspend_time - j));
+ round_jiffies_up_relative(suspend_time - j));
}
return -EAGAIN;
}
@@ -1119,10 +1141,9 @@ static inline int autosuspend_check(struct usb_device *udev, int reschedule)
* all the interfaces which were suspended are resumed so that they remain
* in the same state as the device.
*
- * If an autosuspend is in progress (@udev->auto_pm is set), the routine
- * checks first to make sure that neither the device itself or any of its
- * active interfaces is in use (pm_usage_cnt is greater than 0). If they
- * are, the autosuspend fails.
+ * If an autosuspend is in progress the routine checks first to make sure
+ * that neither the device itself or any of its active interfaces is in use
+ * (pm_usage_cnt is greater than 0). If they are, the autosuspend fails.
*
* If the suspend succeeds, the routine recursively queues an autosuspend
* request for @udev's parent device, thereby propagating the change up
@@ -1157,7 +1178,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
udev->do_remote_wakeup = device_may_wakeup(&udev->dev);
- if (udev->auto_pm) {
+ if (msg.event & PM_EVENT_AUTO) {
status = autosuspend_check(udev, 0);
if (status < 0)
goto done;
@@ -1177,13 +1198,16 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
/* If the suspend failed, resume interfaces that did get suspended */
if (status != 0) {
+ pm_message_t msg2;
+
+ msg2.event = msg.event ^ (PM_EVENT_SUSPEND | PM_EVENT_RESUME);
while (--i >= 0) {
intf = udev->actconfig->interface[i];
- usb_resume_interface(udev, intf, 0);
+ usb_resume_interface(udev, intf, msg2, 0);
}
/* Try another autosuspend when the interfaces aren't busy */
- if (udev->auto_pm)
+ if (msg.event & PM_EVENT_AUTO)
autosuspend_check(udev, status == -EBUSY);
/* If the suspend succeeded then prevent any more URB submissions,
@@ -1213,6 +1237,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
/**
* usb_resume_both - resume a USB device and its interfaces
* @udev: the usb_device to resume
+ * @msg: Power Management message describing this state transition
*
* This is the central routine for resuming USB devices. It calls the
* the resume method for @udev and then calls the resume methods for all
@@ -1238,7 +1263,7 @@ static int usb_suspend_both(struct usb_device *udev, pm_message_t msg)
*
* This routine can run only in process context.
*/
-static int usb_resume_both(struct usb_device *udev)
+static int usb_resume_both(struct usb_device *udev, pm_message_t msg)
{
int status = 0;
int i;
@@ -1254,14 +1279,15 @@ static int usb_resume_both(struct usb_device *udev)
/* Propagate the resume up the tree, if necessary */
if (udev->state == USB_STATE_SUSPENDED) {
- if (udev->auto_pm && udev->autoresume_disabled) {
+ if ((msg.event & PM_EVENT_AUTO) &&
+ udev->autoresume_disabled) {
status = -EPERM;
goto done;
}
if (parent) {
status = usb_autoresume_device(parent);
if (status == 0) {
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
if (status || udev->state ==
USB_STATE_NOTATTACHED) {
usb_autosuspend_device(parent);
@@ -1284,15 +1310,16 @@ static int usb_resume_both(struct usb_device *udev)
/* We can't progagate beyond the USB subsystem,
* so if a root hub's controller is suspended
* then we're stuck. */
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
}
} else if (udev->reset_resume)
- status = usb_resume_device(udev);
+ status = usb_resume_device(udev, msg);
if (status == 0 && udev->actconfig) {
for (i = 0; i < udev->actconfig->desc.bNumInterfaces; i++) {
intf = udev->actconfig->interface[i];
- usb_resume_interface(udev, intf, udev->reset_resume);
+ usb_resume_interface(udev, intf, msg,
+ udev->reset_resume);
}
}
@@ -1320,13 +1347,13 @@ static int usb_autopm_do_device(struct usb_device *udev, int inc_usage_cnt)
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && udev->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev, PMSG_AUTO_RESUME);
if (status != 0)
udev->pm_usage_cnt -= inc_usage_cnt;
else if (inc_usage_cnt)
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && udev->pm_usage_cnt <= 0) {
- status = usb_suspend_both(udev, PMSG_SUSPEND);
+ status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
}
usb_pm_unlock(udev);
return status;
@@ -1341,6 +1368,19 @@ void usb_autosuspend_work(struct work_struct *work)
usb_autopm_do_device(udev, 0);
}
+/* usb_autoresume_work - callback routine to autoresume a USB device */
+void usb_autoresume_work(struct work_struct *work)
+{
+ struct usb_device *udev =
+ container_of(work, struct usb_device, autoresume);
+
+ /* Wake it up, let the drivers do their thing, and then put it
+ * back to sleep.
+ */
+ if (usb_autopm_do_device(udev, 1) == 0)
+ usb_autopm_do_device(udev, -1);
+}
+
/**
* usb_autosuspend_device - delayed autosuspend of a USB device and its interfaces
* @udev: the usb_device to autosuspend
@@ -1437,13 +1477,14 @@ static int usb_autopm_do_interface(struct usb_interface *intf,
udev->last_busy = jiffies;
if (inc_usage_cnt >= 0 && intf->pm_usage_cnt > 0) {
if (udev->state == USB_STATE_SUSPENDED)
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev,
+ PMSG_AUTO_RESUME);
if (status != 0)
intf->pm_usage_cnt -= inc_usage_cnt;
else
udev->last_busy = jiffies;
} else if (inc_usage_cnt <= 0 && intf->pm_usage_cnt <= 0) {
- status = usb_suspend_both(udev, PMSG_SUSPEND);
+ status = usb_suspend_both(udev, PMSG_AUTO_SUSPEND);
}
}
usb_pm_unlock(udev);
@@ -1492,6 +1533,45 @@ void usb_autopm_put_interface(struct usb_interface *intf)
EXPORT_SYMBOL_GPL(usb_autopm_put_interface);
/**
+ * usb_autopm_put_interface_async - decrement a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be decremented
+ *
+ * This routine does essentially the same thing as
+ * usb_autopm_put_interface(): it decrements @intf's usage counter and
+ * queues a delayed autosuspend request if the counter is <= 0. The
+ * difference is that it does not acquire the device's pm_mutex;
+ * callers must handle all synchronization issues themselves.
+ *
+ * Typically a driver would call this routine during an URB's completion
+ * handler, if no more URBs were pending.
+ *
+ * This routine can run in atomic context.
+ */
+void usb_autopm_put_interface_async(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ int status = 0;
+
+ if (intf->condition == USB_INTERFACE_UNBOUND) {
+ status = -ENODEV;
+ } else {
+ udev->last_busy = jiffies;
+ --intf->pm_usage_cnt;
+ if (udev->autosuspend_disabled || udev->autosuspend_delay < 0)
+ status = -EPERM;
+ else if (intf->pm_usage_cnt <= 0 &&
+ !timer_pending(&udev->autosuspend.timer)) {
+ queue_delayed_work(ksuspend_usb_wq, &udev->autosuspend,
+ round_jiffies_up_relative(
+ udev->autosuspend_delay));
+ }
+ }
+ dev_vdbg(&intf->dev, "%s: status %d cnt %d\n",
+ __func__, status, intf->pm_usage_cnt);
+}
+EXPORT_SYMBOL_GPL(usb_autopm_put_interface_async);
+
+/**
* usb_autopm_get_interface - increment a USB interface's PM-usage counter
* @intf: the usb_interface whose counter should be incremented
*
@@ -1537,6 +1617,37 @@ int usb_autopm_get_interface(struct usb_interface *intf)
EXPORT_SYMBOL_GPL(usb_autopm_get_interface);
/**
+ * usb_autopm_get_interface_async - increment a USB interface's PM-usage counter
+ * @intf: the usb_interface whose counter should be incremented
+ *
+ * This routine does much the same thing as
+ * usb_autopm_get_interface(): it increments @intf's usage counter and
+ * queues an autoresume request if the result is > 0. The differences
+ * are that it does not acquire the device's pm_mutex (callers must
+ * handle all synchronization issues themselves), and it does not
+ * autoresume the device directly (it only queues a request). After a
+ * successful call, the device will generally not yet be resumed.
+ *
+ * This routine can run in atomic context.
+ */
+int usb_autopm_get_interface_async(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ int status = 0;
+
+ if (intf->condition == USB_INTERFACE_UNBOUND)
+ status = -ENODEV;
+ else if (udev->autoresume_disabled)
+ status = -EPERM;
+ else if (++intf->pm_usage_cnt > 0 && udev->state == USB_STATE_SUSPENDED)
+ queue_work(ksuspend_usb_wq, &udev->autoresume);
+ dev_vdbg(&intf->dev, "%s: status %d cnt %d\n",
+ __func__, status, intf->pm_usage_cnt);
+ return status;
+}
+EXPORT_SYMBOL_GPL(usb_autopm_get_interface_async);
+
+/**
* usb_autopm_set_interface - set a USB interface's autosuspend state
* @intf: the usb_interface whose state should be set
*
@@ -1563,6 +1674,9 @@ EXPORT_SYMBOL_GPL(usb_autopm_set_interface);
void usb_autosuspend_work(struct work_struct *work)
{}
+void usb_autoresume_work(struct work_struct *work)
+{}
+
#endif /* CONFIG_USB_SUSPEND */
/**
@@ -1595,6 +1709,7 @@ int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
/**
* usb_external_resume_device - external resume of a USB device and its interfaces
* @udev: the usb_device to resume
+ * @msg: Power Management message describing this state transition
*
* This routine handles external resume requests: ones not generated
* internally by a USB driver (autoresume) but rather coming from the user
@@ -1603,13 +1718,13 @@ int usb_external_suspend_device(struct usb_device *udev, pm_message_t msg)
*
* The caller must hold @udev's device lock.
*/
-int usb_external_resume_device(struct usb_device *udev)
+int usb_external_resume_device(struct usb_device *udev, pm_message_t msg)
{
int status;
usb_pm_lock(udev);
udev->auto_pm = 0;
- status = usb_resume_both(udev);
+ status = usb_resume_both(udev, msg);
udev->last_busy = jiffies;
usb_pm_unlock(udev);
if (status == 0)
@@ -1622,7 +1737,7 @@ int usb_external_resume_device(struct usb_device *udev)
return status;
}
-int usb_suspend(struct device *dev, pm_message_t message)
+int usb_suspend(struct device *dev, pm_message_t msg)
{
struct usb_device *udev;
@@ -1641,10 +1756,10 @@ int usb_suspend(struct device *dev, pm_message_t message)
}
udev->skip_sys_resume = 0;
- return usb_external_suspend_device(udev, message);
+ return usb_external_suspend_device(udev, msg);
}
-int usb_resume(struct device *dev)
+int usb_resume(struct device *dev, pm_message_t msg)
{
struct usb_device *udev;
@@ -1656,7 +1771,7 @@ int usb_resume(struct device *dev)
*/
if (udev->skip_sys_resume)
return 0;
- return usb_external_resume_device(udev);
+ return usb_external_resume_device(udev, msg);
}
#endif /* CONFIG_PM */
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index 946fae43d622..e1710f260b4f 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -276,7 +276,7 @@ static void ep_device_release(struct device *dev)
kfree(ep_dev);
}
-int usb_create_ep_files(struct device *parent,
+int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
@@ -340,7 +340,7 @@ exit:
return retval;
}
-void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
+void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
{
struct ep_device *ep_dev = endpoint->ep_dev;
diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index 7e912f21fd36..30ecac3af15a 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -200,18 +200,18 @@ static int generic_suspend(struct usb_device *udev, pm_message_t msg)
* interfaces manually by doing a bus (or "global") suspend.
*/
if (!udev->parent)
- rc = hcd_bus_suspend(udev);
+ rc = hcd_bus_suspend(udev, msg);
/* Non-root devices don't need to do anything for FREEZE or PRETHAW */
else if (msg.event == PM_EVENT_FREEZE || msg.event == PM_EVENT_PRETHAW)
rc = 0;
else
- rc = usb_port_suspend(udev);
+ rc = usb_port_suspend(udev, msg);
return rc;
}
-static int generic_resume(struct usb_device *udev)
+static int generic_resume(struct usb_device *udev, pm_message_t msg)
{
int rc;
@@ -221,9 +221,9 @@ static int generic_resume(struct usb_device *udev)
* interfaces manually by doing a bus (or "global") resume.
*/
if (!udev->parent)
- rc = hcd_bus_resume(udev);
+ rc = hcd_bus_resume(udev, msg);
else
- rc = usb_port_resume(udev);
+ rc = usb_port_resume(udev, msg);
return rc;
}
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 5b87ae7f0a6a..507741ed4482 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -128,6 +128,7 @@ int usb_hcd_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
}
pci_set_master(dev);
+ device_set_wakeup_enable(&dev->dev, 1);
retval = usb_add_hcd(hcd, dev->irq, IRQF_DISABLED | IRQF_SHARED);
if (retval != 0)
@@ -191,17 +192,15 @@ EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
/**
* usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
* @dev: USB Host Controller being suspended
- * @message: semantics in flux
+ * @message: Power Management message describing this state transition
*
- * Store this function in the HCD's struct pci_driver as suspend().
+ * Store this function in the HCD's struct pci_driver as .suspend.
*/
int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
{
- struct usb_hcd *hcd;
+ struct usb_hcd *hcd = pci_get_drvdata(dev);
int retval = 0;
- int has_pci_pm;
-
- hcd = pci_get_drvdata(dev);
+ int wake, w;
/* Root hub suspend should have stopped all downstream traffic,
* and all bus master traffic. And done so for both the interface
@@ -212,8 +211,15 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
* otherwise the swsusp will save (and restore) garbage state.
*/
if (!(hcd->state == HC_STATE_SUSPENDED ||
- hcd->state == HC_STATE_HALT))
- return -EBUSY;
+ hcd->state == HC_STATE_HALT)) {
+ dev_warn(&dev->dev, "Root hub is not suspended\n");
+ retval = -EBUSY;
+ goto done;
+ }
+
+ /* We might already be suspended (runtime PM -- not yet written) */
+ if (dev->current_state != PCI_D0)
+ goto done;
if (hcd->driver->pci_suspend) {
retval = hcd->driver->pci_suspend(hcd, message);
@@ -221,49 +227,60 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
if (retval)
goto done;
}
- synchronize_irq(dev->irq);
- /* FIXME until the generic PM interfaces change a lot more, this
- * can't use PCI D1 and D2 states. For example, the confusion
- * between messages and states will need to vanish, and messages
- * will need to provide a target system state again.
- *
- * It'll be important to learn characteristics of the target state,
- * especially on embedded hardware where the HCD will often be in
- * charge of an external VBUS power supply and one or more clocks.
- * Some target system states will leave them active; others won't.
- * (With PCI, that's often handled by platform BIOS code.)
- */
+ synchronize_irq(dev->irq);
- /* even when the PCI layer rejects some of the PCI calls
- * below, HCs can try global suspend and reduce DMA traffic.
- * PM-sensitive HCDs may already have done this.
+ /* Don't fail on error to enable wakeup. We rely on pci code
+ * to reject requests the hardware can't implement, rather
+ * than coding the same thing.
*/
- has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+ wake = (hcd->state == HC_STATE_SUSPENDED &&
+ device_may_wakeup(&dev->dev));
+ w = pci_wake_from_d3(dev, wake);
+ if (w < 0)
+ wake = w;
+ dev_dbg(&dev->dev, "wakeup: %d\n", wake);
/* Downstream ports from this root hub should already be quiesced, so
* there will be no DMA activity. Now we can shut down the upstream
* link (except maybe for PME# resume signaling) and enter some PCI
* low power state, if the hardware allows.
*/
- if (hcd->state == HC_STATE_SUSPENDED) {
+ pci_disable_device(dev);
+ done:
+ return retval;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
- /* no DMA or IRQs except when HC is active */
- if (dev->current_state == PCI_D0) {
- pci_save_state(dev);
- pci_disable_device(dev);
- }
+/**
+ * usb_hcd_pci_suspend_late - suspend a PCI-based HCD after IRQs are disabled
+ * @dev: USB Host Controller being suspended
+ * @message: Power Management message describing this state transition
+ *
+ * Store this function in the HCD's struct pci_driver as .suspend_late.
+ */
+int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t message)
+{
+ int retval = 0;
+ int has_pci_pm;
- if (message.event == PM_EVENT_FREEZE ||
- message.event == PM_EVENT_PRETHAW) {
- dev_dbg(hcd->self.controller, "--> no state change\n");
- goto done;
- }
+ /* We might already be suspended (runtime PM -- not yet written) */
+ if (dev->current_state != PCI_D0)
+ goto done;
- if (!has_pci_pm) {
- dev_dbg(hcd->self.controller, "--> PCI D0/legacy\n");
- goto done;
- }
+ pci_save_state(dev);
+
+ /* Don't change state if we don't need to */
+ if (message.event == PM_EVENT_FREEZE ||
+ message.event == PM_EVENT_PRETHAW) {
+ dev_dbg(&dev->dev, "--> no state change\n");
+ goto done;
+ }
+
+ has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+ if (!has_pci_pm) {
+ dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
+ } else {
/* NOTE: dev->current_state becomes nonzero only here, and
* only for devices that support PCI PM. Also, exiting
@@ -273,35 +290,16 @@ int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
retval = pci_set_power_state(dev, PCI_D3hot);
suspend_report_result(pci_set_power_state, retval);
if (retval == 0) {
- int wake = device_can_wakeup(&hcd->self.root_hub->dev);
-
- wake = wake && device_may_wakeup(hcd->self.controller);
-
- dev_dbg(hcd->self.controller, "--> PCI D3%s\n",
- wake ? "/wakeup" : "");
-
- /* Ignore these return values. We rely on pci code to
- * reject requests the hardware can't implement, rather
- * than coding the same thing.
- */
- (void) pci_enable_wake(dev, PCI_D3hot, wake);
- (void) pci_enable_wake(dev, PCI_D3cold, wake);
+ dev_dbg(&dev->dev, "--> PCI D3\n");
} else {
dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
retval);
- (void) usb_hcd_pci_resume(dev);
+ pci_restore_state(dev);
}
-
- } else if (hcd->state != HC_STATE_HALT) {
- dev_dbg(hcd->self.controller, "hcd state %d; not suspended\n",
- hcd->state);
- WARN_ON(1);
- retval = -EINVAL;
}
-done:
- if (retval == 0) {
#ifdef CONFIG_PPC_PMAC
+ if (retval == 0) {
/* Disable ASIC clocks for USB */
if (machine_is(powermac)) {
struct device_node *of_node;
@@ -311,30 +309,24 @@ done:
pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 0);
}
-#endif
}
+#endif
+ done:
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
+EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend_late);
/**
- * usb_hcd_pci_resume - power management resume of a PCI-based HCD
+ * usb_hcd_pci_resume_early - resume a PCI-based HCD before IRQs are enabled
* @dev: USB Host Controller being resumed
*
- * Store this function in the HCD's struct pci_driver as resume().
+ * Store this function in the HCD's struct pci_driver as .resume_early.
*/
-int usb_hcd_pci_resume(struct pci_dev *dev)
+int usb_hcd_pci_resume_early(struct pci_dev *dev)
{
- struct usb_hcd *hcd;
- int retval;
-
- hcd = pci_get_drvdata(dev);
- if (hcd->state != HC_STATE_SUSPENDED) {
- dev_dbg(hcd->self.controller,
- "can't resume, not suspended!\n");
- return 0;
- }
+ int retval = 0;
+ pci_power_t state = dev->current_state;
#ifdef CONFIG_PPC_PMAC
/* Reenable ASIC clocks for USB */
@@ -352,7 +344,7 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
* calls "standby", "suspend to RAM", and so on). There are also
* dirty cases when swsusp fakes a suspend in "shutdown" mode.
*/
- if (dev->current_state != PCI_D0) {
+ if (state != PCI_D0) {
#ifdef DEBUG
int pci_pm;
u16 pmcr;
@@ -364,8 +356,7 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
/* Clean case: power to USB and to HC registers was
* maintained; remote wakeup is easy.
*/
- dev_dbg(hcd->self.controller, "resume from PCI D%d\n",
- pmcr);
+ dev_dbg(&dev->dev, "resume from PCI D%d\n", pmcr);
} else {
/* Clean: HC lost Vcc power, D0 uninitialized
* + Vaux may have preserved port and transceiver
@@ -376,32 +367,55 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
* + after BIOS init
* + after Linux init (HCD statically linked)
*/
- dev_dbg(hcd->self.controller,
- "PCI D0, from previous PCI D%d\n",
- dev->current_state);
+ dev_dbg(&dev->dev, "resume from previous PCI D%d\n",
+ state);
}
#endif
- /* yes, ignore these results too... */
- (void) pci_enable_wake(dev, dev->current_state, 0);
- (void) pci_enable_wake(dev, PCI_D3cold, 0);
+
+ retval = pci_set_power_state(dev, PCI_D0);
} else {
/* Same basic cases: clean (powered/not), dirty */
- dev_dbg(hcd->self.controller, "PCI legacy resume\n");
+ dev_dbg(&dev->dev, "PCI legacy resume\n");
+ }
+
+ if (retval < 0)
+ dev_err(&dev->dev, "can't resume: %d\n", retval);
+ else
+ pci_restore_state(dev);
+
+ return retval;
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_resume_early);
+
+/**
+ * usb_hcd_pci_resume - power management resume of a PCI-based HCD
+ * @dev: USB Host Controller being resumed
+ *
+ * Store this function in the HCD's struct pci_driver as .resume.
+ */
+int usb_hcd_pci_resume(struct pci_dev *dev)
+{
+ struct usb_hcd *hcd;
+ int retval;
+
+ hcd = pci_get_drvdata(dev);
+ if (hcd->state != HC_STATE_SUSPENDED) {
+ dev_dbg(hcd->self.controller,
+ "can't resume, not suspended!\n");
+ return 0;
}
- /* NOTE: the PCI API itself is asymmetric here. We don't need to
- * pci_set_power_state(PCI_D0) since that's part of re-enabling;
- * but that won't re-enable bus mastering. Yet pci_disable_device()
- * explicitly disables bus mastering...
- */
retval = pci_enable_device(dev);
if (retval < 0) {
- dev_err(hcd->self.controller,
- "can't re-enable after resume, %d!\n", retval);
+ dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
+ retval);
return retval;
}
+
pci_set_master(dev);
- pci_restore_state(dev);
+
+ /* yes, ignore this result too... */
+ (void) pci_wake_from_d3(dev, 0);
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
@@ -413,7 +427,6 @@ int usb_hcd_pci_resume(struct pci_dev *dev)
usb_hc_died(hcd);
}
}
-
return retval;
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index e1b42626d04d..3c711db55d86 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1010,7 +1010,7 @@ int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb)
spin_lock(&hcd_urb_list_lock);
/* Check that the URB isn't being killed */
- if (unlikely(urb->reject)) {
+ if (unlikely(atomic_read(&urb->reject))) {
rc = -EPERM;
goto done;
}
@@ -1340,7 +1340,7 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
INIT_LIST_HEAD(&urb->urb_list);
atomic_dec(&urb->use_count);
atomic_dec(&urb->dev->urbnum);
- if (urb->reject)
+ if (atomic_read(&urb->reject))
wake_up(&usb_kill_urb_queue);
usb_put_urb(urb);
}
@@ -1444,7 +1444,7 @@ void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, int status)
urb->status = status;
urb->complete (urb);
atomic_dec (&urb->use_count);
- if (unlikely (urb->reject))
+ if (unlikely(atomic_read(&urb->reject)))
wake_up (&usb_kill_urb_queue);
usb_put_urb (urb);
}
@@ -1573,14 +1573,14 @@ int usb_hcd_get_frame_number (struct usb_device *udev)
#ifdef CONFIG_PM
-int hcd_bus_suspend(struct usb_device *rhdev)
+int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg)
{
struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
int status;
int old_state = hcd->state;
dev_dbg(&rhdev->dev, "bus %s%s\n",
- rhdev->auto_pm ? "auto-" : "", "suspend");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "suspend");
if (!hcd->driver->bus_suspend) {
status = -ENOENT;
} else {
@@ -1598,14 +1598,14 @@ int hcd_bus_suspend(struct usb_device *rhdev)
return status;
}
-int hcd_bus_resume(struct usb_device *rhdev)
+int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg)
{
struct usb_hcd *hcd = container_of(rhdev->bus, struct usb_hcd, self);
int status;
int old_state = hcd->state;
dev_dbg(&rhdev->dev, "usb %s%s\n",
- rhdev->auto_pm ? "auto-" : "", "resume");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""), "resume");
if (!hcd->driver->bus_resume)
return -ENOENT;
if (hcd->state == HC_STATE_RUNNING)
@@ -1638,7 +1638,7 @@ static void hcd_resume_work(struct work_struct *work)
usb_lock_device(udev);
usb_mark_last_busy(udev);
- usb_external_resume_device(udev);
+ usb_external_resume_device(udev, PMSG_REMOTE_RESUME);
usb_unlock_device(udev);
}
@@ -2028,7 +2028,7 @@ EXPORT_SYMBOL_GPL(usb_hcd_platform_shutdown);
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_USB_MON)
+#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
struct usb_mon_operations *mon_ops;
@@ -2064,4 +2064,4 @@ void usb_mon_deregister (void)
}
EXPORT_SYMBOL_GPL (usb_mon_deregister);
-#endif /* CONFIG_USB_MON */
+#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 9465e70f4dd0..572d2cf46e8d 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -16,6 +16,8 @@
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#ifndef __USB_CORE_HCD_H
+#define __USB_CORE_HCD_H
#ifdef __KERNEL__
@@ -254,7 +256,9 @@ extern int usb_hcd_pci_probe(struct pci_dev *dev,
extern void usb_hcd_pci_remove(struct pci_dev *dev);
#ifdef CONFIG_PM
-extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t state);
+extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg);
+extern int usb_hcd_pci_suspend_late(struct pci_dev *dev, pm_message_t msg);
+extern int usb_hcd_pci_resume_early(struct pci_dev *dev);
extern int usb_hcd_pci_resume(struct pci_dev *dev);
#endif /* CONFIG_PM */
@@ -386,8 +390,8 @@ extern int usb_find_interface_driver(struct usb_device *dev,
#ifdef CONFIG_PM
extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
extern void usb_root_hub_lost_power(struct usb_device *rhdev);
-extern int hcd_bus_suspend(struct usb_device *rhdev);
-extern int hcd_bus_resume(struct usb_device *rhdev);
+extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
+extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
#else
static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
{
@@ -419,7 +423,7 @@ static inline void usbfs_cleanup(void) { }
/*-------------------------------------------------------------------------*/
-#if defined(CONFIG_USB_MON)
+#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
struct usb_mon_operations {
void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
@@ -461,7 +465,7 @@ static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
int status) {}
-#endif /* CONFIG_USB_MON */
+#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
/*-------------------------------------------------------------------------*/
@@ -490,3 +494,5 @@ extern struct rw_semaphore ehci_cf_port_reset_rwsem;
extern unsigned long usb_hcds_loaded;
#endif /* __KERNEL__ */
+
+#endif /* __USB_CORE_HCD_H */
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index b19cbfcd51da..d5d0e40b1e2d 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -107,7 +107,9 @@ MODULE_PARM_DESC (blinkenlights, "true to cycle leds on hubs");
/* define initial 64-byte descriptor request timeout in milliseconds */
static int initial_descriptor_timeout = USB_CTRL_GET_TIMEOUT;
module_param(initial_descriptor_timeout, int, S_IRUGO|S_IWUSR);
-MODULE_PARM_DESC(initial_descriptor_timeout, "initial 64-byte descriptor request timeout in milliseconds (default 5000 - 5.0 seconds)");
+MODULE_PARM_DESC(initial_descriptor_timeout,
+ "initial 64-byte descriptor request timeout in milliseconds "
+ "(default 5000 - 5.0 seconds)");
/*
* As of 2.6.10 we introduce a new USB device initialization scheme which
@@ -1136,8 +1138,8 @@ static int hub_probe(struct usb_interface *intf, const struct usb_device_id *id)
hdev = interface_to_usbdev(intf);
if (hdev->level == MAX_TOPO_LEVEL) {
- dev_err(&intf->dev, "Unsupported bus topology: "
- "hub nested too deep\n");
+ dev_err(&intf->dev,
+ "Unsupported bus topology: hub nested too deep\n");
return -E2BIG;
}
@@ -1374,8 +1376,9 @@ static void usb_stop_pm(struct usb_device *udev)
usb_autosuspend_device(udev->parent);
usb_pm_unlock(udev);
- /* Stop any autosuspend requests already submitted */
- cancel_rearming_delayed_work(&udev->autosuspend);
+ /* Stop any autosuspend or autoresume requests already submitted */
+ cancel_delayed_work_sync(&udev->autosuspend);
+ cancel_work_sync(&udev->autoresume);
}
#else
@@ -1434,17 +1437,12 @@ void usb_disconnect(struct usb_device **pdev)
usb_disable_device(udev, 0);
usb_hcd_synchronize_unlinks(udev);
+ usb_remove_ep_devs(&udev->ep0);
usb_unlock_device(udev);
- /* Remove the device-specific files from sysfs. This must be
- * done with udev unlocked, because some of the attribute
- * routines try to acquire the device lock.
- */
- usb_remove_sysfs_dev_files(udev);
-
/* Unregister the device. The device driver is responsible
- * for removing the device files from usbfs and sysfs and for
- * de-configuring the device.
+ * for de-configuring the device and invoking the remove-device
+ * notifier chain (used by usbfs and possibly others).
*/
device_del(&udev->dev);
@@ -1476,8 +1474,8 @@ static void announce_device(struct usb_device *udev)
dev_info(&udev->dev, "New USB device found, idVendor=%04x, idProduct=%04x\n",
le16_to_cpu(udev->descriptor.idVendor),
le16_to_cpu(udev->descriptor.idProduct));
- dev_info(&udev->dev, "New USB device strings: Mfr=%d, Product=%d, "
- "SerialNumber=%d\n",
+ dev_info(&udev->dev,
+ "New USB device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
udev->descriptor.iManufacturer,
udev->descriptor.iProduct,
udev->descriptor.iSerialNumber);
@@ -1542,7 +1540,7 @@ static int usb_configure_device_otg(struct usb_device *udev)
* customize to match your product.
*/
dev_info(&udev->dev,
- "can't set HNP mode; %d\n",
+ "can't set HNP mode: %d\n",
err);
bus->b_hnp_enable = 0;
}
@@ -1635,6 +1633,10 @@ int usb_new_device(struct usb_device *udev)
{
int err;
+ /* Increment the parent's count of unsuspended children */
+ if (udev->parent)
+ usb_autoresume_device(udev->parent);
+
usb_detect_quirks(udev); /* Determine quirks */
err = usb_configure_device(udev); /* detect & probe dev/intfs */
if (err < 0)
@@ -1643,13 +1645,12 @@ int usb_new_device(struct usb_device *udev)
udev->dev.devt = MKDEV(USB_DEVICE_MAJOR,
(((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
- /* Increment the parent's count of unsuspended children */
- if (udev->parent)
- usb_autoresume_device(udev->parent);
+ /* Tell the world! */
+ announce_device(udev);
/* Register the device. The device driver is responsible
- * for adding the device files to sysfs and for configuring
- * the device.
+ * for configuring the device and invoking the add-device
+ * notifier chain (used by usbfs and possibly others).
*/
err = device_add(&udev->dev);
if (err) {
@@ -1657,15 +1658,12 @@ int usb_new_device(struct usb_device *udev)
goto fail;
}
- /* put device-specific files into sysfs */
- usb_create_sysfs_dev_files(udev);
-
- /* Tell the world! */
- announce_device(udev);
+ (void) usb_create_ep_devs(&udev->dev, &udev->ep0, udev);
return err;
fail:
usb_set_device_state(udev, USB_STATE_NOTATTACHED);
+ usb_stop_pm(udev);
return err;
}
@@ -1982,7 +1980,7 @@ static int check_port_resume_type(struct usb_device *udev,
*
* Returns 0 on success, else negative errno.
*/
-int usb_port_suspend(struct usb_device *udev)
+int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2021,7 +2019,7 @@ int usb_port_suspend(struct usb_device *udev)
} else {
/* device has up to 10 msec to fully suspend */
dev_dbg(&udev->dev, "usb %ssuspend\n",
- udev->auto_pm ? "auto-" : "");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""));
usb_set_device_state(udev, USB_STATE_SUSPENDED);
msleep(10);
}
@@ -2045,8 +2043,8 @@ static int finish_port_resume(struct usb_device *udev)
u16 devstatus;
/* caller owns the udev device lock */
- dev_dbg(&udev->dev, "finish %sresume\n",
- udev->reset_resume ? "reset-" : "");
+ dev_dbg(&udev->dev, "%s\n",
+ udev->reset_resume ? "finish reset-resume" : "finish resume");
/* usb ch9 identifies four variants of SUSPENDED, based on what
* state the device resumes to. Linux currently won't see the
@@ -2098,8 +2096,9 @@ static int finish_port_resume(struct usb_device *udev)
NULL, 0,
USB_CTRL_SET_TIMEOUT);
if (status)
- dev_dbg(&udev->dev, "disable remote "
- "wakeup, status %d\n", status);
+ dev_dbg(&udev->dev,
+ "disable remote wakeup, status %d\n",
+ status);
}
status = 0;
}
@@ -2140,7 +2139,7 @@ static int finish_port_resume(struct usb_device *udev)
*
* Returns 0 on success, else negative errno.
*/
-int usb_port_resume(struct usb_device *udev)
+int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2165,7 +2164,7 @@ int usb_port_resume(struct usb_device *udev)
} else {
/* drive resume for at least 20 msec */
dev_dbg(&udev->dev, "usb %sresume\n",
- udev->auto_pm ? "auto-" : "");
+ (msg.event & PM_EVENT_AUTO ? "auto-" : ""));
msleep(25);
/* Virtual root hubs can trigger on GET_PORT_STATUS to
@@ -2206,7 +2205,7 @@ static int remote_wakeup(struct usb_device *udev)
if (udev->state == USB_STATE_SUSPENDED) {
dev_dbg(&udev->dev, "usb %sresume\n", "wakeup-");
usb_mark_last_busy(udev);
- status = usb_external_resume_device(udev);
+ status = usb_external_resume_device(udev, PMSG_REMOTE_RESUME);
}
return status;
}
@@ -2215,14 +2214,14 @@ static int remote_wakeup(struct usb_device *udev)
/* When CONFIG_USB_SUSPEND isn't set, we never suspend or resume any ports. */
-int usb_port_suspend(struct usb_device *udev)
+int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
/* However we may need to do a reset-resume */
-int usb_port_resume(struct usb_device *udev)
+int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
struct usb_hub *hub = hdev_to_hub(udev->parent);
int port1 = udev->portnum;
@@ -2262,7 +2261,7 @@ static int hub_suspend(struct usb_interface *intf, pm_message_t msg)
udev = hdev->children [port1-1];
if (udev && udev->can_submit) {
- if (!hdev->auto_pm)
+ if (!(msg.event & PM_EVENT_AUTO))
dev_dbg(&intf->dev, "port %d nyet suspended\n",
port1);
return -EBUSY;
@@ -2385,7 +2384,7 @@ void usb_ep0_reinit(struct usb_device *udev)
{
usb_disable_endpoint(udev, 0 + USB_DIR_IN);
usb_disable_endpoint(udev, 0 + USB_DIR_OUT);
- usb_enable_endpoint(udev, &udev->ep0);
+ usb_enable_endpoint(udev, &udev->ep0, true);
}
EXPORT_SYMBOL_GPL(usb_ep0_reinit);
@@ -2582,9 +2581,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
goto fail;
}
if (r) {
- dev_err(&udev->dev, "device descriptor "
- "read/%s, error %d\n",
- "64", r);
+ dev_err(&udev->dev,
+ "device descriptor read/64, error %d\n",
+ r);
retval = -EMSGSIZE;
continue;
}
@@ -2621,9 +2620,9 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
retval = usb_get_device_descriptor(udev, 8);
if (retval < 8) {
- dev_err(&udev->dev, "device descriptor "
- "read/%s, error %d\n",
- "8", retval);
+ dev_err(&udev->dev,
+ "device descriptor read/8, error %d\n",
+ retval);
if (retval >= 0)
retval = -EMSGSIZE;
} else {
@@ -2650,8 +2649,8 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
retval = usb_get_device_descriptor(udev, USB_DT_DEVICE_SIZE);
if (retval < (signed)sizeof(udev->descriptor)) {
- dev_err(&udev->dev, "device descriptor read/%s, error %d\n",
- "all", retval);
+ dev_err(&udev->dev, "device descriptor read/all, error %d\n",
+ retval);
if (retval >= 0)
retval = -ENOMSG;
goto fail;
@@ -2719,9 +2718,9 @@ hub_power_remaining (struct usb_hub *hub)
else
delta = 8;
if (delta > hub->mA_per_port)
- dev_warn(&udev->dev, "%dmA is over %umA budget "
- "for port %d!\n",
- delta, hub->mA_per_port, port1);
+ dev_warn(&udev->dev,
+ "%dmA is over %umA budget for port %d!\n",
+ delta, hub->mA_per_port, port1);
remaining -= delta;
}
if (remaining < 0) {
@@ -3517,3 +3516,46 @@ int usb_reset_device(struct usb_device *udev)
return ret;
}
EXPORT_SYMBOL_GPL(usb_reset_device);
+
+
+/**
+ * usb_queue_reset_device - Reset a USB device from an atomic context
+ * @iface: USB interface belonging to the device to reset
+ *
+ * This function can be used to reset a USB device from an atomic
+ * context, where usb_reset_device() won't work (as it blocks).
+ *
+ * Doing a reset via this method is functionally equivalent to calling
+ * usb_reset_device(), except for the fact that it is delayed to a
+ * workqueue. This means that any drivers bound to other interfaces
+ * might be unbound, as well as users from usbfs in user space.
+ *
+ * Corner cases:
+ *
+ * - Scheduling two resets at the same time from two different drivers
+ * attached to two different interfaces of the same device is
+ * possible; depending on how the driver attached to each interface
+ * handles ->pre_reset(), the second reset might happen or not.
+ *
+ * - If a driver is unbound and it had a pending reset, the reset will
+ * be cancelled.
+ *
+ * - This function can be called during .probe() or .disconnect()
+ * times. On return from .disconnect(), any pending resets will be
+ * cancelled.
+ *
+ * There is no no need to lock/unlock the @reset_ws as schedule_work()
+ * does its own.
+ *
+ * NOTE: We don't do any reference count tracking because it is not
+ * needed. The lifecycle of the work_struct is tied to the
+ * usb_interface. Before destroying the interface we cancel the
+ * work_struct, so the fact that work_struct is queued and or
+ * running means the interface (and thus, the device) exist and
+ * are referenced.
+ */
+void usb_queue_reset_device(struct usb_interface *iface)
+{
+ schedule_work(&iface->reset_ws);
+}
+EXPORT_SYMBOL_GPL(usb_queue_reset_device);
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 6d1048faf08e..de51667dd64d 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -18,6 +18,8 @@
#include "hcd.h" /* for usbcore internals */
#include "usb.h"
+static void cancel_async_set_config(struct usb_device *udev);
+
struct api_context {
struct completion done;
int status;
@@ -139,9 +141,9 @@ int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request,
dr->bRequestType = requesttype;
dr->bRequest = request;
- dr->wValue = cpu_to_le16p(&value);
- dr->wIndex = cpu_to_le16p(&index);
- dr->wLength = cpu_to_le16p(&size);
+ dr->wValue = cpu_to_le16(value);
+ dr->wIndex = cpu_to_le16(index);
+ dr->wLength = cpu_to_le16(size);
/* dbg("usb_control_msg"); */
@@ -1004,6 +1006,34 @@ int usb_clear_halt(struct usb_device *dev, int pipe)
}
EXPORT_SYMBOL_GPL(usb_clear_halt);
+static int create_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (intf->ep_devs_created || intf->unregistering)
+ return 0;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ (void) usb_create_ep_devs(&intf->dev, &alt->endpoint[i], udev);
+ intf->ep_devs_created = 1;
+ return 0;
+}
+
+static void remove_intf_ep_devs(struct usb_interface *intf)
+{
+ struct usb_host_interface *alt = intf->cur_altsetting;
+ int i;
+
+ if (!intf->ep_devs_created)
+ return;
+
+ for (i = 0; i < alt->desc.bNumEndpoints; ++i)
+ usb_remove_ep_devs(&alt->endpoint[i]);
+ intf->ep_devs_created = 0;
+}
+
/**
* usb_disable_endpoint -- Disable an endpoint by address
* @dev: the device whose endpoint is being disabled
@@ -1092,7 +1122,7 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
dev_dbg(&dev->dev, "unregistering interface %s\n",
dev_name(&interface->dev));
interface->unregistering = 1;
- usb_remove_sysfs_intf_files(interface);
+ remove_intf_ep_devs(interface);
device_del(&interface->dev);
}
@@ -1113,22 +1143,26 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
* usb_enable_endpoint - Enable an endpoint for USB communications
* @dev: the device whose interface is being enabled
* @ep: the endpoint
+ * @reset_toggle: flag to set the endpoint's toggle back to 0
*
- * Resets the endpoint toggle, and sets dev->ep_{in,out} pointers.
+ * Resets the endpoint toggle if asked, and sets dev->ep_{in,out} pointers.
* For control endpoints, both the input and output sides are handled.
*/
-void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
+void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep,
+ bool reset_toggle)
{
int epnum = usb_endpoint_num(&ep->desc);
int is_out = usb_endpoint_dir_out(&ep->desc);
int is_control = usb_endpoint_xfer_control(&ep->desc);
if (is_out || is_control) {
- usb_settoggle(dev, epnum, 1, 0);
+ if (reset_toggle)
+ usb_settoggle(dev, epnum, 1, 0);
dev->ep_out[epnum] = ep;
}
if (!is_out || is_control) {
- usb_settoggle(dev, epnum, 0, 0);
+ if (reset_toggle)
+ usb_settoggle(dev, epnum, 0, 0);
dev->ep_in[epnum] = ep;
}
ep->enabled = 1;
@@ -1138,17 +1172,18 @@ void usb_enable_endpoint(struct usb_device *dev, struct usb_host_endpoint *ep)
* usb_enable_interface - Enable all the endpoints for an interface
* @dev: the device whose interface is being enabled
* @intf: pointer to the interface descriptor
+ * @reset_toggles: flag to set the endpoints' toggles back to 0
*
* Enables all the endpoints for the interface's current altsetting.
*/
-static void usb_enable_interface(struct usb_device *dev,
- struct usb_interface *intf)
+void usb_enable_interface(struct usb_device *dev,
+ struct usb_interface *intf, bool reset_toggles)
{
struct usb_host_interface *alt = intf->cur_altsetting;
int i;
for (i = 0; i < alt->desc.bNumEndpoints; ++i)
- usb_enable_endpoint(dev, &alt->endpoint[i]);
+ usb_enable_endpoint(dev, &alt->endpoint[i], reset_toggles);
}
/**
@@ -1235,8 +1270,10 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
*/
/* prevent submissions using previous endpoint settings */
- if (iface->cur_altsetting != alt)
+ if (iface->cur_altsetting != alt) {
+ remove_intf_ep_devs(iface);
usb_remove_sysfs_intf_files(iface);
+ }
usb_disable_interface(dev, iface);
iface->cur_altsetting = alt;
@@ -1271,10 +1308,11 @@ int usb_set_interface(struct usb_device *dev, int interface, int alternate)
* during the SETUP stage - hence EP0 toggles are "don't care" here.
* (Likewise, EP0 never "halts" on well designed devices.)
*/
- usb_enable_interface(dev, iface);
- if (device_is_registered(&iface->dev))
+ usb_enable_interface(dev, iface, true);
+ if (device_is_registered(&iface->dev)) {
usb_create_sysfs_intf_files(iface);
-
+ create_intf_ep_devs(iface);
+ }
return 0;
}
EXPORT_SYMBOL_GPL(usb_set_interface);
@@ -1334,7 +1372,6 @@ int usb_reset_configuration(struct usb_device *dev)
struct usb_interface *intf = config->interface[i];
struct usb_host_interface *alt;
- usb_remove_sysfs_intf_files(intf);
alt = usb_altnum_to_altsetting(intf, 0);
/* No altsetting 0? We'll assume the first altsetting.
@@ -1345,10 +1382,16 @@ int usb_reset_configuration(struct usb_device *dev)
if (!alt)
alt = &intf->altsetting[0];
+ if (alt != intf->cur_altsetting) {
+ remove_intf_ep_devs(intf);
+ usb_remove_sysfs_intf_files(intf);
+ }
intf->cur_altsetting = alt;
- usb_enable_interface(dev, intf);
- if (device_is_registered(&intf->dev))
+ usb_enable_interface(dev, intf, true);
+ if (device_is_registered(&intf->dev)) {
usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
+ }
}
return 0;
}
@@ -1441,6 +1484,46 @@ static struct usb_interface_assoc_descriptor *find_iad(struct usb_device *dev,
return retval;
}
+
+/*
+ * Internal function to queue a device reset
+ *
+ * This is initialized into the workstruct in 'struct
+ * usb_device->reset_ws' that is launched by
+ * message.c:usb_set_configuration() when initializing each 'struct
+ * usb_interface'.
+ *
+ * It is safe to get the USB device without reference counts because
+ * the life cycle of @iface is bound to the life cycle of @udev. Then,
+ * this function will be ran only if @iface is alive (and before
+ * freeing it any scheduled instances of it will have been cancelled).
+ *
+ * We need to set a flag (usb_dev->reset_running) because when we call
+ * the reset, the interfaces might be unbound. The current interface
+ * cannot try to remove the queued work as it would cause a deadlock
+ * (you cannot remove your work from within your executing
+ * workqueue). This flag lets it know, so that
+ * usb_cancel_queued_reset() doesn't try to do it.
+ *
+ * See usb_queue_reset_device() for more details
+ */
+void __usb_queue_reset_device(struct work_struct *ws)
+{
+ int rc;
+ struct usb_interface *iface =
+ container_of(ws, struct usb_interface, reset_ws);
+ struct usb_device *udev = interface_to_usbdev(iface);
+
+ rc = usb_lock_device_for_reset(udev, iface);
+ if (rc >= 0) {
+ iface->reset_running = 1;
+ usb_reset_device(udev);
+ iface->reset_running = 0;
+ usb_unlock_device(udev);
+ }
+}
+
+
/*
* usb_set_configuration - Makes a particular device setting be current
* @dev: the device whose configuration is being updated
@@ -1560,6 +1643,9 @@ free_interfaces:
if (dev->state != USB_STATE_ADDRESS)
usb_disable_device(dev, 1); /* Skip ep0 */
+ /* Get rid of pending async Set-Config requests for this device */
+ cancel_async_set_config(dev);
+
ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
USB_REQ_SET_CONFIGURATION, 0, configuration, 0,
NULL, 0, USB_CTRL_SET_TIMEOUT);
@@ -1604,13 +1690,14 @@ free_interfaces:
alt = &intf->altsetting[0];
intf->cur_altsetting = alt;
- usb_enable_interface(dev, intf);
+ usb_enable_interface(dev, intf, true);
intf->dev.parent = &dev->dev;
intf->dev.driver = NULL;
intf->dev.bus = &usb_bus_type;
intf->dev.type = &usb_if_device_type;
intf->dev.groups = usb_interface_groups;
intf->dev.dma_mask = dev->dev.dma_mask;
+ INIT_WORK(&intf->reset_ws, __usb_queue_reset_device);
device_initialize(&intf->dev);
mark_quiesced(intf);
dev_set_name(&intf->dev, "%d-%s:%d.%d",
@@ -1641,17 +1728,21 @@ free_interfaces:
dev_name(&intf->dev), ret);
continue;
}
- usb_create_sysfs_intf_files(intf);
+ create_intf_ep_devs(intf);
}
usb_autosuspend_device(dev);
return 0;
}
+static LIST_HEAD(set_config_list);
+static DEFINE_SPINLOCK(set_config_lock);
+
struct set_config_request {
struct usb_device *udev;
int config;
struct work_struct work;
+ struct list_head node;
};
/* Worker routine for usb_driver_set_configuration() */
@@ -1659,14 +1750,35 @@ static void driver_set_config_work(struct work_struct *work)
{
struct set_config_request *req =
container_of(work, struct set_config_request, work);
+ struct usb_device *udev = req->udev;
+
+ usb_lock_device(udev);
+ spin_lock(&set_config_lock);
+ list_del(&req->node);
+ spin_unlock(&set_config_lock);
- usb_lock_device(req->udev);
- usb_set_configuration(req->udev, req->config);
- usb_unlock_device(req->udev);
- usb_put_dev(req->udev);
+ if (req->config >= -1) /* Is req still valid? */
+ usb_set_configuration(udev, req->config);
+ usb_unlock_device(udev);
+ usb_put_dev(udev);
kfree(req);
}
+/* Cancel pending Set-Config requests for a device whose configuration
+ * was just changed
+ */
+static void cancel_async_set_config(struct usb_device *udev)
+{
+ struct set_config_request *req;
+
+ spin_lock(&set_config_lock);
+ list_for_each_entry(req, &set_config_list, node) {
+ if (req->udev == udev)
+ req->config = -999; /* Mark as cancelled */
+ }
+ spin_unlock(&set_config_lock);
+}
+
/**
* usb_driver_set_configuration - Provide a way for drivers to change device configurations
* @udev: the device whose configuration is being updated
@@ -1698,6 +1810,10 @@ int usb_driver_set_configuration(struct usb_device *udev, int config)
req->config = config;
INIT_WORK(&req->work, driver_set_config_work);
+ spin_lock(&set_config_lock);
+ list_add(&req->node, &set_config_list);
+ spin_unlock(&set_config_lock);
+
usb_get_dev(udev);
schedule_work(&req->work);
return 0;
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 4fb65fdc9dc3..4cc2456ef3be 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -359,19 +359,19 @@ set_level(struct device *dev, struct device_attribute *attr,
strncmp(buf, on_string, len) == 0) {
udev->autosuspend_disabled = 1;
udev->autoresume_disabled = 0;
- rc = usb_external_resume_device(udev);
+ rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
} else if (len == sizeof auto_string - 1 &&
strncmp(buf, auto_string, len) == 0) {
udev->autosuspend_disabled = 0;
udev->autoresume_disabled = 0;
- rc = usb_external_resume_device(udev);
+ rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
} else if (len == sizeof suspend_string - 1 &&
strncmp(buf, suspend_string, len) == 0) {
udev->autosuspend_disabled = 0;
udev->autoresume_disabled = 1;
- rc = usb_external_suspend_device(udev, PMSG_SUSPEND);
+ rc = usb_external_suspend_device(udev, PMSG_USER_SUSPEND);
} else
rc = -EINVAL;
@@ -629,9 +629,6 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
struct device *dev = &udev->dev;
int retval;
- /* Unforunately these attributes cannot be created before
- * the uevent is broadcast.
- */
retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
if (retval)
goto error;
@@ -643,11 +640,7 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
retval = add_power_attributes(dev);
if (retval)
goto error;
-
- retval = usb_create_ep_files(dev, &udev->ep0, udev);
- if (retval)
- goto error;
- return 0;
+ return retval;
error:
usb_remove_sysfs_dev_files(udev);
return retval;
@@ -657,7 +650,6 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
{
struct device *dev = &udev->dev;
- usb_remove_ep_files(&udev->ep0);
remove_power_attributes(dev);
remove_persist_attributes(dev);
device_remove_bin_file(dev, &dev_bin_attr_descriptors);
@@ -812,28 +804,6 @@ struct attribute_group *usb_interface_groups[] = {
NULL
};
-static inline void usb_create_intf_ep_files(struct usb_interface *intf,
- struct usb_device *udev)
-{
- struct usb_host_interface *iface_desc;
- int i;
-
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_create_ep_files(&intf->dev, &iface_desc->endpoint[i],
- udev);
-}
-
-static inline void usb_remove_intf_ep_files(struct usb_interface *intf)
-{
- struct usb_host_interface *iface_desc;
- int i;
-
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_remove_ep_files(&iface_desc->endpoint[i]);
-}
-
int usb_create_sysfs_intf_files(struct usb_interface *intf)
{
struct usb_device *udev = interface_to_usbdev(intf);
@@ -843,26 +813,19 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf)
if (intf->sysfs_files_created || intf->unregistering)
return 0;
- /* The interface string may be present in some altsettings
- * and missing in others. Hence its attribute cannot be created
- * before the uevent is broadcast.
- */
if (alt->string == NULL)
alt->string = usb_cache_string(udev, alt->desc.iInterface);
if (alt->string)
retval = device_create_file(&intf->dev, &dev_attr_interface);
- usb_create_intf_ep_files(intf, udev);
intf->sysfs_files_created = 1;
return 0;
}
void usb_remove_sysfs_intf_files(struct usb_interface *intf)
{
- struct device *dev = &intf->dev;
-
if (!intf->sysfs_files_created)
return;
- usb_remove_intf_ep_files(intf);
- device_remove_file(dev, &dev_attr_interface);
+
+ device_remove_file(&intf->dev, &dev_attr_interface);
intf->sysfs_files_created = 0;
}
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 1f68af9db3f7..58bc5e3c2560 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -10,7 +10,6 @@
#define to_urb(d) container_of(d, struct urb, kref)
-static DEFINE_SPINLOCK(usb_reject_lock);
static void urb_destroy(struct kref *kref)
{
@@ -131,9 +130,7 @@ void usb_anchor_urb(struct urb *urb, struct usb_anchor *anchor)
urb->anchor = anchor;
if (unlikely(anchor->poisoned)) {
- spin_lock(&usb_reject_lock);
- urb->reject++;
- spin_unlock(&usb_reject_lock);
+ atomic_inc(&urb->reject);
}
spin_unlock_irqrestore(&anchor->lock, flags);
@@ -565,16 +562,12 @@ void usb_kill_urb(struct urb *urb)
might_sleep();
if (!(urb && urb->dev && urb->ep))
return;
- spin_lock_irq(&usb_reject_lock);
- ++urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_inc(&urb->reject);
usb_hcd_unlink_urb(urb, -ENOENT);
wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);
- spin_lock_irq(&usb_reject_lock);
- --urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_dec(&urb->reject);
}
EXPORT_SYMBOL_GPL(usb_kill_urb);
@@ -606,9 +599,7 @@ void usb_poison_urb(struct urb *urb)
might_sleep();
if (!(urb && urb->dev && urb->ep))
return;
- spin_lock_irq(&usb_reject_lock);
- ++urb->reject;
- spin_unlock_irq(&usb_reject_lock);
+ atomic_inc(&urb->reject);
usb_hcd_unlink_urb(urb, -ENOENT);
wait_event(usb_kill_urb_queue, atomic_read(&urb->use_count) == 0);
@@ -617,14 +608,10 @@ EXPORT_SYMBOL_GPL(usb_poison_urb);
void usb_unpoison_urb(struct urb *urb)
{
- unsigned long flags;
-
if (!urb)
return;
- spin_lock_irqsave(&usb_reject_lock, flags);
- --urb->reject;
- spin_unlock_irqrestore(&usb_reject_lock, flags);
+ atomic_dec(&urb->reject);
}
EXPORT_SYMBOL_GPL(usb_unpoison_urb);
@@ -692,6 +679,26 @@ void usb_poison_anchored_urbs(struct usb_anchor *anchor)
EXPORT_SYMBOL_GPL(usb_poison_anchored_urbs);
/**
+ * usb_unpoison_anchored_urbs - let an anchor be used successfully again
+ * @anchor: anchor the requests are bound to
+ *
+ * Reverses the effect of usb_poison_anchored_urbs
+ * the anchor can be used normally after it returns
+ */
+void usb_unpoison_anchored_urbs(struct usb_anchor *anchor)
+{
+ unsigned long flags;
+ struct urb *lazarus;
+
+ spin_lock_irqsave(&anchor->lock, flags);
+ list_for_each_entry(lazarus, &anchor->urb_list, anchor_list) {
+ usb_unpoison_urb(lazarus);
+ }
+ anchor->poisoned = 0;
+ spin_unlock_irqrestore(&anchor->lock, flags);
+}
+EXPORT_SYMBOL_GPL(usb_unpoison_anchored_urbs);
+/**
* usb_unlink_anchored_urbs - asynchronously cancel transfer requests en masse
* @anchor: anchor the requests are bound to
*
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 399e15fc5052..dcfc072630c1 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -253,7 +253,7 @@ static int usb_dev_prepare(struct device *dev)
static void usb_dev_complete(struct device *dev)
{
/* Currently used only for rebinding interfaces */
- usb_resume(dev); /* Implement eventually? */
+ usb_resume(dev, PMSG_RESUME); /* Message event is meaningless */
}
static int usb_dev_suspend(struct device *dev)
@@ -263,7 +263,7 @@ static int usb_dev_suspend(struct device *dev)
static int usb_dev_resume(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_RESUME);
}
static int usb_dev_freeze(struct device *dev)
@@ -273,7 +273,7 @@ static int usb_dev_freeze(struct device *dev)
static int usb_dev_thaw(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_THAW);
}
static int usb_dev_poweroff(struct device *dev)
@@ -283,7 +283,7 @@ static int usb_dev_poweroff(struct device *dev)
static int usb_dev_restore(struct device *dev)
{
- return usb_resume(dev);
+ return usb_resume(dev, PMSG_RESTORE);
}
static struct dev_pm_ops usb_device_pm_ops = {
@@ -362,7 +362,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT;
/* ep0 maxpacket comes later, from device descriptor */
- usb_enable_endpoint(dev, &dev->ep0);
+ usb_enable_endpoint(dev, &dev->ep0, true);
dev->can_submit = 1;
/* Save readable and stable topology id, distinguishing devices
@@ -402,6 +402,7 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
#ifdef CONFIG_PM
mutex_init(&dev->pm_mutex);
INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
+ INIT_WORK(&dev->autoresume, usb_autoresume_work);
dev->autosuspend_delay = usb_autosuspend_delay * HZ;
dev->connect_time = jiffies;
dev->active_duration = -jiffies;
@@ -513,10 +514,7 @@ EXPORT_SYMBOL_GPL(usb_put_intf);
* disconnect; in some drivers (such as usb-storage) the disconnect()
* or suspend() method will block waiting for a device reset to complete.
*
- * Returns a negative error code for failure, otherwise 1 or 0 to indicate
- * that the device will or will not have to be unlocked. (0 can be
- * returned when an interface is given and is BINDING, because in that
- * case the driver already owns the device lock.)
+ * Returns a negative error code for failure, otherwise 0.
*/
int usb_lock_device_for_reset(struct usb_device *udev,
const struct usb_interface *iface)
@@ -527,16 +525,9 @@ int usb_lock_device_for_reset(struct usb_device *udev,
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface) {
- switch (iface->condition) {
- case USB_INTERFACE_BINDING:
- return 0;
- case USB_INTERFACE_BOUND:
- break;
- default:
- return -EINTR;
- }
- }
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
+ return -EINTR;
while (usb_trylock_device(udev) != 0) {
@@ -550,10 +541,11 @@ int usb_lock_device_for_reset(struct usb_device *udev,
return -ENODEV;
if (udev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
- if (iface && iface->condition != USB_INTERFACE_BOUND)
+ if (iface && (iface->condition == USB_INTERFACE_UNBINDING ||
+ iface->condition == USB_INTERFACE_UNBOUND))
return -EINTR;
}
- return 1;
+ return 0;
}
EXPORT_SYMBOL_GPL(usb_lock_device_for_reset);
@@ -962,8 +954,12 @@ void usb_buffer_unmap_sg(const struct usb_device *dev, int is_in,
}
EXPORT_SYMBOL_GPL(usb_buffer_unmap_sg);
-/* format to disable USB on kernel command line is: nousb */
-__module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
+/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */
+#ifdef MODULE
+module_param(nousb, bool, 0444);
+#else
+core_param(nousb, nousb, bool, 0444);
+#endif
/*
* for external read access to <nousb>
@@ -975,6 +971,37 @@ int usb_disabled(void)
EXPORT_SYMBOL_GPL(usb_disabled);
/*
+ * Notifications of device and interface registration
+ */
+static int usb_bus_notify(struct notifier_block *nb, unsigned long action,
+ void *data)
+{
+ struct device *dev = data;
+
+ switch (action) {
+ case BUS_NOTIFY_ADD_DEVICE:
+ if (dev->type == &usb_device_type)
+ (void) usb_create_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ (void) usb_create_sysfs_intf_files(
+ to_usb_interface(dev));
+ break;
+
+ case BUS_NOTIFY_DEL_DEVICE:
+ if (dev->type == &usb_device_type)
+ usb_remove_sysfs_dev_files(to_usb_device(dev));
+ else if (dev->type == &usb_if_device_type)
+ usb_remove_sysfs_intf_files(to_usb_interface(dev));
+ break;
+ }
+ return 0;
+}
+
+static struct notifier_block usb_bus_nb = {
+ .notifier_call = usb_bus_notify,
+};
+
+/*
* Init
*/
static int __init usb_init(void)
@@ -991,6 +1018,9 @@ static int __init usb_init(void)
retval = bus_register(&usb_bus_type);
if (retval)
goto bus_register_failed;
+ retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
+ if (retval)
+ goto bus_notifier_failed;
retval = usb_host_init();
if (retval)
goto host_init_failed;
@@ -1025,6 +1055,8 @@ driver_register_failed:
major_init_failed:
usb_host_cleanup();
host_init_failed:
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
+bus_notifier_failed:
bus_unregister(&usb_bus_type);
bus_register_failed:
ksuspend_usb_cleanup();
@@ -1048,6 +1080,7 @@ static void __exit usb_exit(void)
usb_devio_cleanup();
usb_hub_cleanup();
usb_host_cleanup();
+ bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
ksuspend_usb_cleanup();
}
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 9a1a45ac3add..386177867a8a 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -1,16 +1,20 @@
+#include <linux/pm.h>
+
/* Functions local to drivers/usb/core/ */
extern int usb_create_sysfs_dev_files(struct usb_device *dev);
extern void usb_remove_sysfs_dev_files(struct usb_device *dev);
extern int usb_create_sysfs_intf_files(struct usb_interface *intf);
extern void usb_remove_sysfs_intf_files(struct usb_interface *intf);
-extern int usb_create_ep_files(struct device *parent,
+extern int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev);
-extern void usb_remove_ep_files(struct usb_host_endpoint *endpoint);
+extern void usb_remove_ep_devs(struct usb_host_endpoint *endpoint);
extern void usb_enable_endpoint(struct usb_device *dev,
- struct usb_host_endpoint *ep);
+ struct usb_host_endpoint *ep, bool reset_toggle);
+extern void usb_enable_interface(struct usb_device *dev,
+ struct usb_interface *intf, bool reset_toggles);
extern void usb_disable_endpoint(struct usb_device *dev, unsigned int epaddr);
extern void usb_disable_interface(struct usb_device *dev,
struct usb_interface *intf);
@@ -42,14 +46,16 @@ extern void usb_host_cleanup(void);
#ifdef CONFIG_PM
extern int usb_suspend(struct device *dev, pm_message_t msg);
-extern int usb_resume(struct device *dev);
+extern int usb_resume(struct device *dev, pm_message_t msg);
extern void usb_autosuspend_work(struct work_struct *work);
-extern int usb_port_suspend(struct usb_device *dev);
-extern int usb_port_resume(struct usb_device *dev);
+extern void usb_autoresume_work(struct work_struct *work);
+extern int usb_port_suspend(struct usb_device *dev, pm_message_t msg);
+extern int usb_port_resume(struct usb_device *dev, pm_message_t msg);
extern int usb_external_suspend_device(struct usb_device *udev,
pm_message_t msg);
-extern int usb_external_resume_device(struct usb_device *udev);
+extern int usb_external_resume_device(struct usb_device *udev,
+ pm_message_t msg);
static inline void usb_pm_lock(struct usb_device *udev)
{
@@ -63,12 +69,12 @@ static inline void usb_pm_unlock(struct usb_device *udev)
#else
-static inline int usb_port_suspend(struct usb_device *udev)
+static inline int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
-static inline int usb_port_resume(struct usb_device *udev)
+static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
{
return 0;
}
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index dd4cd5a51370..3219d137340a 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -297,13 +297,34 @@ config USB_S3C2410_DEBUG
# musb builds in ../musb along with host support
config USB_GADGET_MUSB_HDRC
- boolean "Inventra HDRC USB Peripheral (TI, ...)"
+ boolean "Inventra HDRC USB Peripheral (TI, ADI, ...)"
depends on USB_MUSB_HDRC && (USB_MUSB_PERIPHERAL || USB_MUSB_OTG)
select USB_GADGET_DUALSPEED
select USB_GADGET_SELECTED
help
This OTG-capable silicon IP is used in dual designs including
- the TI DaVinci, OMAP 243x, OMAP 343x, and TUSB 6010.
+ the TI DaVinci, OMAP 243x, OMAP 343x, TUSB 6010, and ADI Blackfin
+
+config USB_GADGET_IMX
+ boolean "Freescale IMX USB Peripheral Controller"
+ depends on ARCH_MX1
+ help
+ Freescale's IMX series include an integrated full speed
+ USB 1.1 device controller. The controller in the IMX series
+ is register-compatible.
+
+ It has Six fixed-function endpoints, as well as endpoint
+ zero (for control transfers).
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "imx_udc" and force all
+ gadget drivers to also be dynamically linked.
+
+config USB_IMX
+ tristate
+ depends on USB_GADGET_IMX
+ default USB_GADGET
+ select USB_GADGET_SELECTED
config USB_GADGET_M66592
boolean "Renesas M66592 USB Peripheral Controller"
@@ -377,6 +398,24 @@ config USB_FSL_QE
default USB_GADGET
select USB_GADGET_SELECTED
+config USB_GADGET_CI13XXX
+ boolean "MIPS USB CI13xxx"
+ depends on PCI
+ select USB_GADGET_DUALSPEED
+ help
+ MIPS USB IP core family device controller
+ Currently it only supports IP part number CI13412
+
+ Say "y" to link the driver statically, or "m" to build a
+ dynamically linked module called "ci13xxx_udc" and force all
+ gadget drivers to also be dynamically linked.
+
+config USB_CI13XXX
+ tristate
+ depends on USB_GADGET_CI13XXX
+ default USB_GADGET
+ select USB_GADGET_SELECTED
+
config USB_GADGET_NET2280
boolean "NetChip 228x"
depends on PCI
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index bd4041b47dce..39a51d746cb7 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_USB_NET2280) += net2280.o
obj-$(CONFIG_USB_AMD5536UDC) += amd5536udc.o
obj-$(CONFIG_USB_PXA25X) += pxa25x_udc.o
obj-$(CONFIG_USB_PXA27X) += pxa27x_udc.o
+obj-$(CONFIG_USB_IMX) += imx_udc.o
obj-$(CONFIG_USB_GOKU) += goku_udc.o
obj-$(CONFIG_USB_OMAP) += omap_udc.o
obj-$(CONFIG_USB_LH7A40X) += lh7a40x_udc.o
@@ -19,6 +20,7 @@ obj-$(CONFIG_USB_ATMEL_USBA) += atmel_usba_udc.o
obj-$(CONFIG_USB_FSL_USB2) += fsl_usb2_udc.o
obj-$(CONFIG_USB_M66592) += m66592-udc.o
obj-$(CONFIG_USB_FSL_QE) += fsl_qe_udc.o
+obj-$(CONFIG_USB_CI13XXX) += ci13xxx_udc.o
#
# USB gadget drivers
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
new file mode 100644
index 000000000000..bebf911c7e5f
--- /dev/null
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -0,0 +1,2830 @@
+/*
+ * ci13xxx_udc.c - MIPS USB IP core family device controller
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Description: MIPS USB IP core family device controller
+ * Currently it only supports IP part number CI13412
+ *
+ * This driver is composed of several blocks:
+ * - HW: hardware interface
+ * - DBG: debug facilities (optional)
+ * - UTIL: utilities
+ * - ISR: interrupts handling
+ * - ENDPT: endpoint operations (Gadget API)
+ * - GADGET: gadget operations (Gadget API)
+ * - BUS: bus glue code, bus abstraction layer
+ * - PCI: PCI core interface and PCI resources (interrupts, memory...)
+ *
+ * Compile Options
+ * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
+ * - STALL_IN: non-empty bulk-in pipes cannot be halted
+ * if defined mass storage compliance succeeds but with warnings
+ * => case 4: Hi > Dn
+ * => case 5: Hi > Di
+ * => case 8: Hi <> Do
+ * if undefined usbtest 13 fails
+ * - TRACE: enable function tracing (depends on DEBUG)
+ *
+ * Main Features
+ * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
+ * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
+ * - Normal & LPM support
+ *
+ * USBTEST Report
+ * - OK: 0-12, 13 (STALL_IN defined) & 14
+ * - Not Supported: 15 & 16 (ISO)
+ *
+ * TODO List
+ * - OTG
+ * - Isochronous & Interrupt Traffic
+ * - Handle requests which spawns into several TDs
+ * - GET_STATUS(device) - always reports 0
+ * - Gadget API (majority of optional features)
+ * - Suspend & Remote Wakeup
+ */
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include "ci13xxx_udc.h"
+
+
+/******************************************************************************
+ * DEFINE
+ *****************************************************************************/
+/* ctrl register bank access */
+static DEFINE_SPINLOCK(udc_lock);
+
+/* driver name */
+#define UDC_DRIVER_NAME "ci13xxx_udc"
+
+/* control endpoint description */
+static const struct usb_endpoint_descriptor
+ctrl_endpt_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
+ .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
+};
+
+/* UDC descriptor */
+static struct ci13xxx *_udc;
+
+/* Interrupt statistics */
+#define ISR_MASK 0x1F
+static struct {
+ u32 test;
+ u32 ui;
+ u32 uei;
+ u32 pci;
+ u32 uri;
+ u32 sli;
+ u32 none;
+ struct {
+ u32 cnt;
+ u32 buf[ISR_MASK+1];
+ u32 idx;
+ } hndl;
+} isr_statistics;
+
+/**
+ * ffs_nr: find first (least significant) bit set
+ * @x: the word to search
+ *
+ * This function returns bit number (instead of position)
+ */
+static int ffs_nr(u32 x)
+{
+ int n = ffs(x);
+
+ return n ? n-1 : 32;
+}
+
+/******************************************************************************
+ * HW block
+ *****************************************************************************/
+/* register bank descriptor */
+static struct {
+ unsigned lpm; /* is LPM? */
+ void __iomem *abs; /* bus map offset */
+ void __iomem *cap; /* bus map offset + CAP offset + CAP data */
+ size_t size; /* bank size */
+} hw_bank;
+
+/* UDC register map */
+#define ABS_CAPLENGTH (0x100UL)
+#define ABS_HCCPARAMS (0x108UL)
+#define ABS_DCCPARAMS (0x124UL)
+#define ABS_TESTMODE (hw_bank.lpm ? 0x0FCUL : 0x138UL)
+/* offset to CAPLENTGH (addr + data) */
+#define CAP_USBCMD (0x000UL)
+#define CAP_USBSTS (0x004UL)
+#define CAP_USBINTR (0x008UL)
+#define CAP_DEVICEADDR (0x014UL)
+#define CAP_ENDPTLISTADDR (0x018UL)
+#define CAP_PORTSC (0x044UL)
+#define CAP_DEVLC (0x0B4UL)
+#define CAP_USBMODE (hw_bank.lpm ? 0x0C8UL : 0x068UL)
+#define CAP_ENDPTSETUPSTAT (hw_bank.lpm ? 0x0D8UL : 0x06CUL)
+#define CAP_ENDPTPRIME (hw_bank.lpm ? 0x0DCUL : 0x070UL)
+#define CAP_ENDPTFLUSH (hw_bank.lpm ? 0x0E0UL : 0x074UL)
+#define CAP_ENDPTSTAT (hw_bank.lpm ? 0x0E4UL : 0x078UL)
+#define CAP_ENDPTCOMPLETE (hw_bank.lpm ? 0x0E8UL : 0x07CUL)
+#define CAP_ENDPTCTRL (hw_bank.lpm ? 0x0ECUL : 0x080UL)
+#define CAP_LAST (hw_bank.lpm ? 0x12CUL : 0x0C0UL)
+
+/* maximum number of enpoints: valid only after hw_device_reset() */
+static unsigned hw_ep_max;
+
+/**
+ * hw_ep_bit: calculates the bit number
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns bit number
+ */
+static inline int hw_ep_bit(int num, int dir)
+{
+ return num + (dir ? 16 : 0);
+}
+
+/**
+ * hw_aread: reads from register bitfield
+ * @addr: address relative to bus map
+ * @mask: bitfield mask
+ *
+ * This function returns register bitfield data
+ */
+static u32 hw_aread(u32 addr, u32 mask)
+{
+ return ioread32(addr + hw_bank.abs) & mask;
+}
+
+/**
+ * hw_awrite: writes to register bitfield
+ * @addr: address relative to bus map
+ * @mask: bitfield mask
+ * @data: new data
+ */
+static void hw_awrite(u32 addr, u32 mask, u32 data)
+{
+ iowrite32(hw_aread(addr, ~mask) | (data & mask),
+ addr + hw_bank.abs);
+}
+
+/**
+ * hw_cread: reads from register bitfield
+ * @addr: address relative to CAP offset plus content
+ * @mask: bitfield mask
+ *
+ * This function returns register bitfield data
+ */
+static u32 hw_cread(u32 addr, u32 mask)
+{
+ return ioread32(addr + hw_bank.cap) & mask;
+}
+
+/**
+ * hw_cwrite: writes to register bitfield
+ * @addr: address relative to CAP offset plus content
+ * @mask: bitfield mask
+ * @data: new data
+ */
+static void hw_cwrite(u32 addr, u32 mask, u32 data)
+{
+ iowrite32(hw_cread(addr, ~mask) | (data & mask),
+ addr + hw_bank.cap);
+}
+
+/**
+ * hw_ctest_and_clear: tests & clears register bitfield
+ * @addr: address relative to CAP offset plus content
+ * @mask: bitfield mask
+ *
+ * This function returns register bitfield data
+ */
+static u32 hw_ctest_and_clear(u32 addr, u32 mask)
+{
+ u32 reg = hw_cread(addr, mask);
+
+ iowrite32(reg, addr + hw_bank.cap);
+ return reg;
+}
+
+/**
+ * hw_ctest_and_write: tests & writes register bitfield
+ * @addr: address relative to CAP offset plus content
+ * @mask: bitfield mask
+ * @data: new data
+ *
+ * This function returns register bitfield data
+ */
+static u32 hw_ctest_and_write(u32 addr, u32 mask, u32 data)
+{
+ u32 reg = hw_cread(addr, ~0);
+
+ iowrite32((reg & ~mask) | (data & mask), addr + hw_bank.cap);
+ return (reg & mask) >> ffs_nr(mask);
+}
+
+/**
+ * hw_device_reset: resets chip (execute without interruption)
+ * @base: register base address
+ *
+ * This function returns an error code
+ */
+static int hw_device_reset(void __iomem *base)
+{
+ u32 reg;
+
+ /* bank is a module variable */
+ hw_bank.abs = base;
+
+ hw_bank.cap = hw_bank.abs;
+ hw_bank.cap += ABS_CAPLENGTH;
+ hw_bank.cap += ioread8(hw_bank.cap);
+
+ reg = hw_aread(ABS_HCCPARAMS, HCCPARAMS_LEN) >> ffs_nr(HCCPARAMS_LEN);
+ hw_bank.lpm = reg;
+ hw_bank.size = hw_bank.cap - hw_bank.abs;
+ hw_bank.size += CAP_LAST;
+ hw_bank.size /= sizeof(u32);
+
+ /* should flush & stop before reset */
+ hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0);
+ hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
+
+ hw_cwrite(CAP_USBCMD, USBCMD_RST, USBCMD_RST);
+ while (hw_cread(CAP_USBCMD, USBCMD_RST))
+ udelay(10); /* not RTOS friendly */
+
+ /* USBMODE should be configured step by step */
+ hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
+ hw_cwrite(CAP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
+ hw_cwrite(CAP_USBMODE, USBMODE_SLOM, USBMODE_SLOM); /* HW >= 2.3 */
+
+ if (hw_cread(CAP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
+ pr_err("cannot enter in device mode");
+ pr_err("lpm = %i", hw_bank.lpm);
+ return -ENODEV;
+ }
+
+ reg = hw_aread(ABS_DCCPARAMS, DCCPARAMS_DEN) >> ffs_nr(DCCPARAMS_DEN);
+ if (reg == 0 || reg > ENDPT_MAX)
+ return -ENODEV;
+
+ hw_ep_max = reg; /* cache hw ENDPT_MAX */
+
+ /* setup lock mode ? */
+
+ /* ENDPTSETUPSTAT is '0' by default */
+
+ /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
+
+ return 0;
+}
+
+/**
+ * hw_device_state: enables/disables interrupts & starts/stops device (execute
+ * without interruption)
+ * @dma: 0 => disable, !0 => enable and set dma engine
+ *
+ * This function returns an error code
+ */
+static int hw_device_state(u32 dma)
+{
+ if (dma) {
+ hw_cwrite(CAP_ENDPTLISTADDR, ~0, dma);
+ /* interrupt, error, port change, reset, sleep/suspend */
+ hw_cwrite(CAP_USBINTR, ~0,
+ USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
+ hw_cwrite(CAP_USBCMD, USBCMD_RS, USBCMD_RS);
+ } else {
+ hw_cwrite(CAP_USBCMD, USBCMD_RS, 0);
+ hw_cwrite(CAP_USBINTR, ~0, 0);
+ }
+ return 0;
+}
+
+/**
+ * hw_ep_flush: flush endpoint fifo (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns an error code
+ */
+static int hw_ep_flush(int num, int dir)
+{
+ int n = hw_ep_bit(num, dir);
+
+ do {
+ /* flush any pending transfer */
+ hw_cwrite(CAP_ENDPTFLUSH, BIT(n), BIT(n));
+ while (hw_cread(CAP_ENDPTFLUSH, BIT(n)))
+ cpu_relax();
+ } while (hw_cread(CAP_ENDPTSTAT, BIT(n)));
+
+ return 0;
+}
+
+/**
+ * hw_ep_disable: disables endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns an error code
+ */
+static int hw_ep_disable(int num, int dir)
+{
+ hw_ep_flush(num, dir);
+ hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32),
+ dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
+ return 0;
+}
+
+/**
+ * hw_ep_enable: enables endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @type: endpoint type
+ *
+ * This function returns an error code
+ */
+static int hw_ep_enable(int num, int dir, int type)
+{
+ u32 mask, data;
+
+ if (dir) {
+ mask = ENDPTCTRL_TXT; /* type */
+ data = type << ffs_nr(mask);
+
+ mask |= ENDPTCTRL_TXS; /* unstall */
+ mask |= ENDPTCTRL_TXR; /* reset data toggle */
+ data |= ENDPTCTRL_TXR;
+ mask |= ENDPTCTRL_TXE; /* enable */
+ data |= ENDPTCTRL_TXE;
+ } else {
+ mask = ENDPTCTRL_RXT; /* type */
+ data = type << ffs_nr(mask);
+
+ mask |= ENDPTCTRL_RXS; /* unstall */
+ mask |= ENDPTCTRL_RXR; /* reset data toggle */
+ data |= ENDPTCTRL_RXR;
+ mask |= ENDPTCTRL_RXE; /* enable */
+ data |= ENDPTCTRL_RXE;
+ }
+ hw_cwrite(CAP_ENDPTCTRL + num * sizeof(u32), mask, data);
+ return 0;
+}
+
+/**
+ * hw_ep_get_halt: return endpoint halt status
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns 1 if endpoint halted
+ */
+static int hw_ep_get_halt(int num, int dir)
+{
+ u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
+
+ return hw_cread(CAP_ENDPTCTRL + num * sizeof(u32), mask) ? 1 : 0;
+}
+
+/**
+ * hw_ep_is_primed: test if endpoint is primed (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns true if endpoint primed
+ */
+static int hw_ep_is_primed(int num, int dir)
+{
+ u32 reg = hw_cread(CAP_ENDPTPRIME, ~0) | hw_cread(CAP_ENDPTSTAT, ~0);
+
+ return test_bit(hw_ep_bit(num, dir), (void *)&reg);
+}
+
+/**
+ * hw_test_and_clear_setup_status: test & clear setup status (execute without
+ * interruption)
+ * @n: bit number (endpoint)
+ *
+ * This function returns setup status
+ */
+static int hw_test_and_clear_setup_status(int n)
+{
+ return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
+}
+
+/**
+ * hw_ep_prime: primes endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @is_ctrl: true if control endpoint
+ *
+ * This function returns an error code
+ */
+static int hw_ep_prime(int num, int dir, int is_ctrl)
+{
+ int n = hw_ep_bit(num, dir);
+
+ /* the caller should flush first */
+ if (hw_ep_is_primed(num, dir))
+ return -EBUSY;
+
+ if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
+ return -EAGAIN;
+
+ hw_cwrite(CAP_ENDPTPRIME, BIT(n), BIT(n));
+
+ while (hw_cread(CAP_ENDPTPRIME, BIT(n)))
+ cpu_relax();
+ if (is_ctrl && dir == RX && hw_cread(CAP_ENDPTSETUPSTAT, BIT(num)))
+ return -EAGAIN;
+
+ /* status shoult be tested according with manual but it doesn't work */
+ return 0;
+}
+
+/**
+ * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
+ * without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @value: true => stall, false => unstall
+ *
+ * This function returns an error code
+ */
+static int hw_ep_set_halt(int num, int dir, int value)
+{
+ if (value != 0 && value != 1)
+ return -EINVAL;
+
+ do {
+ u32 addr = CAP_ENDPTCTRL + num * sizeof(u32);
+ u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
+ u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
+
+ /* data toggle - reserved for EP0 but it's in ESS */
+ hw_cwrite(addr, mask_xs|mask_xr, value ? mask_xs : mask_xr);
+
+ } while (value != hw_ep_get_halt(num, dir));
+
+ return 0;
+}
+
+/**
+ * hw_intr_clear: disables interrupt & clears interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_clear(int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_cwrite(CAP_USBINTR, BIT(n), 0);
+ hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
+ return 0;
+}
+
+/**
+ * hw_intr_force: enables interrupt & forces interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_force(int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
+ hw_cwrite(CAP_USBINTR, BIT(n), BIT(n));
+ hw_cwrite(CAP_USBSTS, BIT(n), BIT(n));
+ hw_awrite(ABS_TESTMODE, TESTMODE_FORCE, 0);
+ return 0;
+}
+
+/**
+ * hw_is_port_high_speed: test if port is high speed
+ *
+ * This function returns true if high speed port
+ */
+static int hw_port_is_high_speed(void)
+{
+ return hw_bank.lpm ? hw_cread(CAP_DEVLC, DEVLC_PSPD) :
+ hw_cread(CAP_PORTSC, PORTSC_HSP);
+}
+
+/**
+ * hw_port_test_get: reads port test mode value
+ *
+ * This function returns port test mode value
+ */
+static u8 hw_port_test_get(void)
+{
+ return hw_cread(CAP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
+}
+
+/**
+ * hw_port_test_set: writes port test mode (execute without interruption)
+ * @mode: new value
+ *
+ * This function returns an error code
+ */
+static int hw_port_test_set(u8 mode)
+{
+ const u8 TEST_MODE_MAX = 7;
+
+ if (mode > TEST_MODE_MAX)
+ return -EINVAL;
+
+ hw_cwrite(CAP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
+ return 0;
+}
+
+/**
+ * hw_read_intr_enable: returns interrupt enable register
+ *
+ * This function returns register data
+ */
+static u32 hw_read_intr_enable(void)
+{
+ return hw_cread(CAP_USBINTR, ~0);
+}
+
+/**
+ * hw_read_intr_status: returns interrupt status register
+ *
+ * This function returns register data
+ */
+static u32 hw_read_intr_status(void)
+{
+ return hw_cread(CAP_USBSTS, ~0);
+}
+
+/**
+ * hw_register_read: reads all device registers (execute without interruption)
+ * @buf: destination buffer
+ * @size: buffer size
+ *
+ * This function returns number of registers read
+ */
+static size_t hw_register_read(u32 *buf, size_t size)
+{
+ unsigned i;
+
+ if (size > hw_bank.size)
+ size = hw_bank.size;
+
+ for (i = 0; i < size; i++)
+ buf[i] = hw_aread(i * sizeof(u32), ~0);
+
+ return size;
+}
+
+/**
+ * hw_register_write: writes to register
+ * @addr: register address
+ * @data: register value
+ *
+ * This function returns an error code
+ */
+static int hw_register_write(u16 addr, u32 data)
+{
+ /* align */
+ addr /= sizeof(u32);
+
+ if (addr >= hw_bank.size)
+ return -EINVAL;
+
+ /* align */
+ addr *= sizeof(u32);
+
+ hw_awrite(addr, ~0, data);
+ return 0;
+}
+
+/**
+ * hw_test_and_clear_complete: test & clear complete status (execute without
+ * interruption)
+ * @n: bit number (endpoint)
+ *
+ * This function returns complete status
+ */
+static int hw_test_and_clear_complete(int n)
+{
+ return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
+}
+
+/**
+ * hw_test_and_clear_intr_active: test & clear active interrupts (execute
+ * without interruption)
+ *
+ * This function returns active interrutps
+ */
+static u32 hw_test_and_clear_intr_active(void)
+{
+ u32 reg = hw_read_intr_status() & hw_read_intr_enable();
+
+ hw_cwrite(CAP_USBSTS, ~0, reg);
+ return reg;
+}
+
+/**
+ * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
+ * interruption)
+ *
+ * This function returns guard value
+ */
+static int hw_test_and_clear_setup_guard(void)
+{
+ return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, 0);
+}
+
+/**
+ * hw_test_and_set_setup_guard: test & set setup guard (execute without
+ * interruption)
+ *
+ * This function returns guard value
+ */
+static int hw_test_and_set_setup_guard(void)
+{
+ return hw_ctest_and_write(CAP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
+}
+
+/**
+ * hw_usb_set_address: configures USB address (execute without interruption)
+ * @value: new USB address
+ *
+ * This function returns an error code
+ */
+static int hw_usb_set_address(u8 value)
+{
+ /* advance */
+ hw_cwrite(CAP_DEVICEADDR, DEVICEADDR_USBADR | DEVICEADDR_USBADRA,
+ value << ffs_nr(DEVICEADDR_USBADR) | DEVICEADDR_USBADRA);
+ return 0;
+}
+
+/**
+ * hw_usb_reset: restart device after a bus reset (execute without
+ * interruption)
+ *
+ * This function returns an error code
+ */
+static int hw_usb_reset(void)
+{
+ hw_usb_set_address(0);
+
+ /* ESS flushes only at end?!? */
+ hw_cwrite(CAP_ENDPTFLUSH, ~0, ~0); /* flush all EPs */
+
+ /* clear setup token semaphores */
+ hw_cwrite(CAP_ENDPTSETUPSTAT, 0, 0); /* writes its content */
+
+ /* clear complete status */
+ hw_cwrite(CAP_ENDPTCOMPLETE, 0, 0); /* writes its content */
+
+ /* wait until all bits cleared */
+ while (hw_cread(CAP_ENDPTPRIME, ~0))
+ udelay(10); /* not RTOS friendly */
+
+ /* reset all endpoints ? */
+
+ /* reset internal status and wait for further instructions
+ no need to verify the port reset status (ESS does it) */
+
+ return 0;
+}
+
+/******************************************************************************
+ * DBG block
+ *****************************************************************************/
+/**
+ * show_device: prints information about device capabilities and status
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_device(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget *gadget = &udc->gadget;
+ int n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
+ gadget->speed);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
+ gadget->is_dualspeed);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
+ gadget->is_otg);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
+ gadget->is_a_peripheral);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
+ gadget->b_hnp_enable);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
+ gadget->a_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
+ gadget->a_alt_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
+ (gadget->name ? gadget->name : ""));
+
+ return n;
+}
+static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
+
+/**
+ * show_driver: prints information about attached gadget (if any)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget_driver *driver = udc->driver;
+ int n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ if (driver == NULL)
+ return scnprintf(buf, PAGE_SIZE,
+ "There is no gadget attached!\n");
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
+ (driver->function ? driver->function : ""));
+ n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
+ driver->speed);
+
+ return n;
+}
+static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
+
+/* Maximum event message length */
+#define DBG_DATA_MSG 64UL
+
+/* Maximum event messages */
+#define DBG_DATA_MAX 128UL
+
+/* Event buffer descriptor */
+static struct {
+ char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
+ unsigned idx; /* index */
+ unsigned tty; /* print to console? */
+ rwlock_t lck; /* lock */
+} dbg_data = {
+ .idx = 0,
+ .tty = 0,
+ .lck = __RW_LOCK_UNLOCKED(lck)
+};
+
+/**
+ * dbg_dec: decrements debug event index
+ * @idx: buffer index
+ */
+static void dbg_dec(unsigned *idx)
+{
+ *idx = (*idx - 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_inc: increments debug event index
+ * @idx: buffer index
+ */
+static void dbg_inc(unsigned *idx)
+{
+ *idx = (*idx + 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_print: prints the common part of the event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ * @extra: extra information
+ */
+static void dbg_print(u8 addr, const char *name, int status, const char *extra)
+{
+ struct timeval tval;
+ unsigned int stamp;
+ unsigned long flags;
+
+ write_lock_irqsave(&dbg_data.lck, flags);
+
+ do_gettimeofday(&tval);
+ stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
+ stamp = stamp * 1000000 + tval.tv_usec;
+
+ scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
+ "%04X\t %02X %-7.7s %4i \t%s\n",
+ stamp, addr, name, status, extra);
+
+ dbg_inc(&dbg_data.idx);
+
+ write_unlock_irqrestore(&dbg_data.lck, flags);
+
+ if (dbg_data.tty != 0)
+ pr_notice("%04X\t %02X %-7.7s %4i \t%s\n",
+ stamp, addr, name, status, extra);
+}
+
+/**
+ * dbg_done: prints a DONE event
+ * @addr: endpoint address
+ * @td: transfer descriptor
+ * @status: status
+ */
+static void dbg_done(u8 addr, const u32 token, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ scnprintf(msg, sizeof(msg), "%d %02X",
+ (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
+ (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
+ dbg_print(addr, "DONE", status, msg);
+}
+
+/**
+ * dbg_event: prints a generic event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ */
+static void dbg_event(u8 addr, const char *name, int status)
+{
+ if (name != NULL)
+ dbg_print(addr, name, status, "");
+}
+
+/*
+ * dbg_queue: prints a QUEUE event
+ * @addr: endpoint address
+ * @req: USB request
+ * @status: status
+ */
+static void dbg_queue(u8 addr, const struct usb_request *req, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ if (req != NULL) {
+ scnprintf(msg, sizeof(msg),
+ "%d %d", !req->no_interrupt, req->length);
+ dbg_print(addr, "QUEUE", status, msg);
+ }
+}
+
+/**
+ * dbg_setup: prints a SETUP event
+ * @addr: endpoint address
+ * @req: setup request
+ */
+static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
+{
+ char msg[DBG_DATA_MSG];
+
+ if (req != NULL) {
+ scnprintf(msg, sizeof(msg),
+ "%02X %02X %04X %04X %d", req->bRequestType,
+ req->bRequest, le16_to_cpu(req->wValue),
+ le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
+ dbg_print(addr, "SETUP", 0, msg);
+ }
+}
+
+/**
+ * show_events: displays the event buffer
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_events(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ read_lock_irqsave(&dbg_data.lck, flags);
+
+ i = dbg_data.idx;
+ for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
+ n += strlen(dbg_data.buf[i]);
+ if (n >= PAGE_SIZE) {
+ n -= strlen(dbg_data.buf[i]);
+ break;
+ }
+ }
+ for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
+ j += scnprintf(buf + j, PAGE_SIZE - j,
+ "%s", dbg_data.buf[i]);
+
+ read_unlock_irqrestore(&dbg_data.lck, flags);
+
+ return n;
+}
+
+/**
+ * store_events: configure if events are going to be also printed to console
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_events(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned tty;
+
+ dbg_trace("[%s] %p, %d\n", __func__, buf, count);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
+ dev_err(dev, "<1|0>: enable|disable console log\n");
+ goto done;
+ }
+
+ dbg_data.tty = tty;
+ dev_info(dev, "tty = %u", dbg_data.tty);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
+
+/**
+ * show_inters: interrupt status, enable status and historic
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 intr;
+ unsigned i, j, n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "status = %08x\n", hw_read_intr_status());
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "enable = %08x\n", hw_read_intr_enable());
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
+ isr_statistics.test);
+ n += scnprintf(buf + n, PAGE_SIZE - n, " ui = %d\n",
+ isr_statistics.ui);
+ n += scnprintf(buf + n, PAGE_SIZE - n, " uei = %d\n",
+ isr_statistics.uei);
+ n += scnprintf(buf + n, PAGE_SIZE - n, " pci = %d\n",
+ isr_statistics.pci);
+ n += scnprintf(buf + n, PAGE_SIZE - n, " uri = %d\n",
+ isr_statistics.uri);
+ n += scnprintf(buf + n, PAGE_SIZE - n, " sli = %d\n",
+ isr_statistics.sli);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
+ isr_statistics.none);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
+ isr_statistics.hndl.cnt);
+
+ for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
+ i &= ISR_MASK;
+ intr = isr_statistics.hndl.buf[i];
+
+ if (USBi_UI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
+ intr &= ~USBi_UI;
+ if (USBi_UEI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
+ intr &= ~USBi_UEI;
+ if (USBi_PCI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
+ intr &= ~USBi_PCI;
+ if (USBi_URI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
+ intr &= ~USBi_URI;
+ if (USBi_SLI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
+ intr &= ~USBi_SLI;
+ if (intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
+ if (isr_statistics.hndl.buf[i])
+ n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
+ }
+
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ return n;
+}
+
+/**
+ * store_inters: enable & force or disable an individual interrutps
+ * (to be used for test purposes only)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned en, bit;
+
+ dbg_trace("[%s] %p, %d\n", __func__, buf, count);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
+ dev_err(dev, "<1|0> <bit>: enable|disable interrupt");
+ goto done;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ if (en) {
+ if (hw_intr_force(bit))
+ dev_err(dev, "invalid bit number\n");
+ else
+ isr_statistics.test++;
+ } else {
+ if (hw_intr_clear(bit))
+ dev_err(dev, "invalid bit number\n");
+ }
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
+
+/**
+ * show_port_test: reads port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_port_test(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ mode = hw_port_test_get();
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
+}
+
+/**
+ * store_port_test: writes port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_port_test(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ dbg_trace("[%s] %p, %d\n", __func__, buf, count);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &mode) != 1) {
+ dev_err(dev, "<mode>: set port test mode");
+ goto done;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ if (hw_port_test_set(mode))
+ dev_err(dev, "invalid mode\n");
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
+ show_port_test, store_port_test);
+
+/**
+ * show_qheads: DMA contents of all queue heads
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ for (i = 0; i < hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: RX=%08X TX=%08X\n",
+ i, (u32)mEp->qh[RX].dma, (u32)mEp->qh[TX].dma);
+ for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X %08X\n", j,
+ *((u32 *)mEp->qh[RX].ptr + j),
+ *((u32 *)mEp->qh[TX].ptr + j));
+ }
+ }
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
+
+/**
+ * show_registers: dumps all registers
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_registers(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 dump[512];
+ unsigned i, k, n = 0;
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ k = hw_register_read(dump, sizeof(dump)/sizeof(u32));
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ for (i = 0; i < k; i++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "reg[0x%04X] = 0x%08X\n",
+ i * (unsigned)sizeof(u32), dump[i]);
+ }
+
+ return n;
+}
+
+/**
+ * store_registers: writes value to register address
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_registers(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long addr, data, flags;
+
+ dbg_trace("[%s] %p, %d\n", __func__, buf, count);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%li %li", &addr, &data) != 2) {
+ dev_err(dev, "<addr> <data>: write data to register address");
+ goto done;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ if (hw_register_write(addr, data))
+ dev_err(dev, "invalid address range\n");
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
+ show_registers, store_registers);
+
+/**
+ * show_requests: DMA contents of all requests currently queued (all endpts)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ struct list_head *ptr = NULL;
+ struct ci13xxx_req *req = NULL;
+ unsigned i, j, k, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
+
+ dbg_trace("[%s] %p\n", __func__, buf);
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+ for (i = 0; i < hw_ep_max; i++)
+ for (k = RX; k <= TX; k++)
+ list_for_each(ptr, &udc->ci13xxx_ep[i].qh[k].queue)
+ {
+ req = list_entry(ptr,
+ struct ci13xxx_req, queue);
+
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: TD=%08X %s\n",
+ i, (u32)req->dma,
+ ((k == RX) ? "RX" : "TX"));
+
+ for (j = 0; j < qSize; j++)
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X\n", j,
+ *((u32 *)req->ptr + j));
+ }
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
+
+/**
+ * dbg_create_files: initializes the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+__maybe_unused static int dbg_create_files(struct device *dev)
+{
+ int retval = 0;
+
+ if (dev == NULL)
+ return -EINVAL;
+ retval = device_create_file(dev, &dev_attr_device);
+ if (retval)
+ goto done;
+ retval = device_create_file(dev, &dev_attr_driver);
+ if (retval)
+ goto rm_device;
+ retval = device_create_file(dev, &dev_attr_events);
+ if (retval)
+ goto rm_driver;
+ retval = device_create_file(dev, &dev_attr_inters);
+ if (retval)
+ goto rm_events;
+ retval = device_create_file(dev, &dev_attr_port_test);
+ if (retval)
+ goto rm_inters;
+ retval = device_create_file(dev, &dev_attr_qheads);
+ if (retval)
+ goto rm_port_test;
+ retval = device_create_file(dev, &dev_attr_registers);
+ if (retval)
+ goto rm_qheads;
+ retval = device_create_file(dev, &dev_attr_requests);
+ if (retval)
+ goto rm_registers;
+ return 0;
+
+ rm_registers:
+ device_remove_file(dev, &dev_attr_registers);
+ rm_qheads:
+ device_remove_file(dev, &dev_attr_qheads);
+ rm_port_test:
+ device_remove_file(dev, &dev_attr_port_test);
+ rm_inters:
+ device_remove_file(dev, &dev_attr_inters);
+ rm_events:
+ device_remove_file(dev, &dev_attr_events);
+ rm_driver:
+ device_remove_file(dev, &dev_attr_driver);
+ rm_device:
+ device_remove_file(dev, &dev_attr_device);
+ done:
+ return retval;
+}
+
+/**
+ * dbg_remove_files: destroys the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+__maybe_unused static int dbg_remove_files(struct device *dev)
+{
+ if (dev == NULL)
+ return -EINVAL;
+ device_remove_file(dev, &dev_attr_requests);
+ device_remove_file(dev, &dev_attr_registers);
+ device_remove_file(dev, &dev_attr_qheads);
+ device_remove_file(dev, &dev_attr_port_test);
+ device_remove_file(dev, &dev_attr_inters);
+ device_remove_file(dev, &dev_attr_events);
+ device_remove_file(dev, &dev_attr_driver);
+ device_remove_file(dev, &dev_attr_device);
+ return 0;
+}
+
+/******************************************************************************
+ * UTIL block
+ *****************************************************************************/
+/**
+ * _usb_addr: calculates endpoint address from direction & number
+ * @ep: endpoint
+ */
+static inline u8 _usb_addr(struct ci13xxx_ep *ep)
+{
+ return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
+}
+
+/**
+ * _hardware_queue: configures a request at hardware level
+ * @gadget: gadget
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ */
+static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
+{
+ unsigned i;
+
+ trace("%p, %p", mEp, mReq);
+
+ /* don't queue twice */
+ if (mReq->req.status == -EALREADY)
+ return -EALREADY;
+
+ if (hw_ep_is_primed(mEp->num, mEp->dir))
+ return -EBUSY;
+
+ mReq->req.status = -EALREADY;
+
+ if (mReq->req.length && !mReq->req.dma) {
+ mReq->req.dma = \
+ dma_map_single(mEp->device, mReq->req.buf,
+ mReq->req.length, mEp->dir ?
+ DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ if (mReq->req.dma == 0)
+ return -ENOMEM;
+
+ mReq->map = 1;
+ }
+
+ /*
+ * TD configuration
+ * TODO - handle requests which spawns into several TDs
+ */
+ memset(mReq->ptr, 0, sizeof(*mReq->ptr));
+ mReq->ptr->next |= TD_TERMINATE;
+ mReq->ptr->token = mReq->req.length << ffs_nr(TD_TOTAL_BYTES);
+ mReq->ptr->token &= TD_TOTAL_BYTES;
+ mReq->ptr->token |= TD_IOC;
+ mReq->ptr->token |= TD_STATUS_ACTIVE;
+ mReq->ptr->page[0] = mReq->req.dma;
+ for (i = 1; i < 5; i++)
+ mReq->ptr->page[i] =
+ (mReq->req.dma + i * PAGE_SIZE) & ~TD_RESERVED_MASK;
+
+ /*
+ * QH configuration
+ * At this point it's guaranteed exclusive access to qhead
+ * (endpt is not primed) so it's no need to use tripwire
+ */
+ mEp->qh[mEp->dir].ptr->td.next = mReq->dma; /* TERMINATE = 0 */
+ mEp->qh[mEp->dir].ptr->td.token &= ~TD_STATUS; /* clear status */
+ if (mReq->req.zero == 0)
+ mEp->qh[mEp->dir].ptr->cap |= QH_ZLT;
+ else
+ mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
+
+ wmb(); /* synchronize before ep prime */
+
+ return hw_ep_prime(mEp->num, mEp->dir,
+ mEp->type == USB_ENDPOINT_XFER_CONTROL);
+}
+
+/**
+ * _hardware_dequeue: handles a request at hardware level
+ * @gadget: gadget
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ */
+static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
+{
+ trace("%p, %p", mEp, mReq);
+
+ if (mReq->req.status != -EALREADY)
+ return -EINVAL;
+
+ if (hw_ep_is_primed(mEp->num, mEp->dir))
+ hw_ep_flush(mEp->num, mEp->dir);
+
+ mReq->req.status = 0;
+
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
+ mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ mReq->req.dma = 0;
+ mReq->map = 0;
+ }
+
+ mReq->req.status = mReq->ptr->token & TD_STATUS;
+ if ((TD_STATUS_ACTIVE & mReq->req.status) != 0)
+ mReq->req.status = -ECONNRESET;
+ else if ((TD_STATUS_HALTED & mReq->req.status) != 0)
+ mReq->req.status = -1;
+ else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
+ mReq->req.status = -1;
+ else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
+ mReq->req.status = -1;
+
+ mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
+ mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
+ mReq->req.actual = mReq->req.length - mReq->req.actual;
+ mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
+
+ return mReq->req.actual;
+}
+
+/**
+ * _ep_nuke: dequeues all endpoint requests
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ * Caller must hold lock
+ */
+static int _ep_nuke(struct ci13xxx_ep *mEp)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ trace("%p", mEp);
+
+ if (mEp == NULL)
+ return -EINVAL;
+
+ hw_ep_flush(mEp->num, mEp->dir);
+
+ while (!list_empty(&mEp->qh[mEp->dir].queue)) {
+
+ /* pop oldest request */
+ struct ci13xxx_req *mReq = \
+ list_entry(mEp->qh[mEp->dir].queue.next,
+ struct ci13xxx_req, queue);
+ list_del_init(&mReq->queue);
+ mReq->req.status = -ESHUTDOWN;
+
+ if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
+ * @gadget: gadget
+ *
+ * This function returns an error code
+ * Caller must hold lock
+ */
+static int _gadget_stop_activity(struct usb_gadget *gadget)
+__releases(udc->lock)
+__acquires(udc->lock)
+{
+ struct usb_ep *ep;
+ struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
+ struct ci13xxx_ep *mEp = container_of(gadget->ep0,
+ struct ci13xxx_ep, ep);
+
+ trace("%p", gadget);
+
+ if (gadget == NULL)
+ return -EINVAL;
+
+ spin_unlock(udc->lock);
+
+ /* flush all endpoints */
+ gadget_for_each_ep(ep, gadget) {
+ usb_ep_fifo_flush(ep);
+ }
+ usb_ep_fifo_flush(gadget->ep0);
+
+ udc->driver->disconnect(gadget);
+
+ /* make sure to disable all endpoints */
+ gadget_for_each_ep(ep, gadget) {
+ usb_ep_disable(ep);
+ }
+ usb_ep_disable(gadget->ep0);
+
+ if (mEp->status != NULL) {
+ usb_ep_free_request(gadget->ep0, mEp->status);
+ mEp->status = NULL;
+ }
+
+ spin_lock(udc->lock);
+
+ return 0;
+}
+
+/******************************************************************************
+ * ISR block
+ *****************************************************************************/
+/**
+ * isr_reset_handler: USB reset interrupt handler
+ * @udc: UDC device
+ *
+ * This function resets USB engine after a bus reset occurred
+ */
+static void isr_reset_handler(struct ci13xxx *udc)
+__releases(udc->lock)
+__acquires(udc->lock)
+{
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[0];
+ int retval;
+
+ trace("%p", udc);
+
+ if (udc == NULL) {
+ err("EINVAL");
+ return;
+ }
+
+ dbg_event(0xFF, "BUS RST", 0);
+
+ retval = _gadget_stop_activity(&udc->gadget);
+ if (retval)
+ goto done;
+
+ retval = hw_usb_reset();
+ if (retval)
+ goto done;
+
+ spin_unlock(udc->lock);
+ retval = usb_ep_enable(&mEp->ep, &ctrl_endpt_desc);
+ if (!retval) {
+ mEp->status = usb_ep_alloc_request(&mEp->ep, GFP_KERNEL);
+ if (mEp->status == NULL) {
+ usb_ep_disable(&mEp->ep);
+ retval = -ENOMEM;
+ }
+ }
+ spin_lock(udc->lock);
+
+ done:
+ if (retval)
+ err("error: %i", retval);
+}
+
+/**
+ * isr_get_status_complete: get_status request complete function
+ * @ep: endpoint
+ * @req: request handled
+ *
+ * Caller must release lock
+ */
+static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ trace("%p, %p", ep, req);
+
+ if (ep == NULL || req == NULL) {
+ err("EINVAL");
+ return;
+ }
+
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+/**
+ * isr_get_status_response: get_status request response
+ * @ep: endpoint
+ * @setup: setup request packet
+ *
+ * This function returns an error code
+ */
+static int isr_get_status_response(struct ci13xxx_ep *mEp,
+ struct usb_ctrlrequest *setup)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ struct usb_request *req = NULL;
+ gfp_t gfp_flags = GFP_ATOMIC;
+ int dir, num, retval;
+
+ trace("%p, %p", mEp, setup);
+
+ if (mEp == NULL || setup == NULL)
+ return -EINVAL;
+
+ spin_unlock(mEp->lock);
+ req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
+ spin_lock(mEp->lock);
+ if (req == NULL)
+ return -ENOMEM;
+
+ req->complete = isr_get_status_complete;
+ req->length = 2;
+ req->buf = kzalloc(req->length, gfp_flags);
+ if (req->buf == NULL) {
+ retval = -ENOMEM;
+ goto err_free_req;
+ }
+
+ if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
+ /* TODO: D1 - Remote Wakeup; D0 - Self Powered */
+ retval = 0;
+ } else if ((setup->bRequestType & USB_RECIP_MASK) \
+ == USB_RECIP_ENDPOINT) {
+ dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
+ TX : RX;
+ num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+ *((u16 *)req->buf) = hw_ep_get_halt(num, dir);
+ }
+ /* else do nothing; reserved for future use */
+
+ spin_unlock(mEp->lock);
+ retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
+ spin_lock(mEp->lock);
+ if (retval)
+ goto err_free_buf;
+
+ return 0;
+
+ err_free_buf:
+ kfree(req->buf);
+ err_free_req:
+ spin_unlock(mEp->lock);
+ usb_ep_free_request(&mEp->ep, req);
+ spin_lock(mEp->lock);
+ return retval;
+}
+
+/**
+ * isr_setup_status_phase: queues the status phase of a setup transation
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ */
+static int isr_setup_status_phase(struct ci13xxx_ep *mEp)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ int retval;
+
+ trace("%p", mEp);
+
+ /* mEp is always valid & configured */
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ mEp->status->no_interrupt = 1;
+
+ spin_unlock(mEp->lock);
+ retval = usb_ep_queue(&mEp->ep, mEp->status, GFP_ATOMIC);
+ spin_lock(mEp->lock);
+
+ return retval;
+}
+
+/**
+ * isr_tr_complete_low: transaction complete low level handler
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ * Caller must hold lock
+ */
+static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ struct ci13xxx_req *mReq;
+ int retval;
+
+ trace("%p", mEp);
+
+ if (list_empty(&mEp->qh[mEp->dir].queue))
+ return -EINVAL;
+
+ /* pop oldest request */
+ mReq = list_entry(mEp->qh[mEp->dir].queue.next,
+ struct ci13xxx_req, queue);
+ list_del_init(&mReq->queue);
+
+ retval = _hardware_dequeue(mEp, mReq);
+ if (retval < 0) {
+ dbg_event(_usb_addr(mEp), "DONE", retval);
+ goto done;
+ }
+
+ dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
+
+ if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+
+ if (!list_empty(&mEp->qh[mEp->dir].queue)) {
+ mReq = list_entry(mEp->qh[mEp->dir].queue.next,
+ struct ci13xxx_req, queue);
+ _hardware_enqueue(mEp, mReq);
+ }
+
+ done:
+ return retval;
+}
+
+/**
+ * isr_tr_complete_handler: transaction complete interrupt handler
+ * @udc: UDC descriptor
+ *
+ * This function handles traffic events
+ */
+static void isr_tr_complete_handler(struct ci13xxx *udc)
+__releases(udc->lock)
+__acquires(udc->lock)
+{
+ unsigned i;
+
+ trace("%p", udc);
+
+ if (udc == NULL) {
+ err("EINVAL");
+ return;
+ }
+
+ for (i = 0; i < hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+ int type, num, err = -EINVAL;
+ struct usb_ctrlrequest req;
+
+
+ if (mEp->desc == NULL)
+ continue; /* not configured */
+
+ if ((mEp->dir == RX && hw_test_and_clear_complete(i)) ||
+ (mEp->dir == TX && hw_test_and_clear_complete(i + 16))) {
+ err = isr_tr_complete_low(mEp);
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+ if (err > 0) /* needs status phase */
+ err = isr_setup_status_phase(mEp);
+ if (err < 0) {
+ dbg_event(_usb_addr(mEp),
+ "ERROR", err);
+ spin_unlock(udc->lock);
+ if (usb_ep_set_halt(&mEp->ep))
+ err("error: ep_set_halt");
+ spin_lock(udc->lock);
+ }
+ }
+ }
+
+ if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
+ !hw_test_and_clear_setup_status(i))
+ continue;
+
+ if (i != 0) {
+ warn("ctrl traffic received at endpoint");
+ continue;
+ }
+
+ /* read_setup_packet */
+ do {
+ hw_test_and_set_setup_guard();
+ memcpy(&req, &mEp->qh[RX].ptr->setup, sizeof(req));
+ } while (!hw_test_and_clear_setup_guard());
+
+ type = req.bRequestType;
+
+ mEp->dir = (type & USB_DIR_IN) ? TX : RX;
+
+ dbg_setup(_usb_addr(mEp), &req);
+
+ switch (req.bRequest) {
+ case USB_REQ_CLEAR_FEATURE:
+ if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
+ goto delegate;
+ if (req.wLength != 0)
+ break;
+ num = le16_to_cpu(req.wIndex);
+ num &= USB_ENDPOINT_NUMBER_MASK;
+ if (!udc->ci13xxx_ep[num].wedge) {
+ spin_unlock(udc->lock);
+ err = usb_ep_clear_halt(
+ &udc->ci13xxx_ep[num].ep);
+ spin_lock(udc->lock);
+ if (err)
+ break;
+ }
+ err = isr_setup_status_phase(mEp);
+ break;
+ case USB_REQ_GET_STATUS:
+ if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
+ type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
+ type != (USB_DIR_IN|USB_RECIP_INTERFACE))
+ goto delegate;
+ if (le16_to_cpu(req.wLength) != 2 ||
+ le16_to_cpu(req.wValue) != 0)
+ break;
+ err = isr_get_status_response(mEp, &req);
+ break;
+ case USB_REQ_SET_ADDRESS:
+ if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
+ goto delegate;
+ if (le16_to_cpu(req.wLength) != 0 ||
+ le16_to_cpu(req.wIndex) != 0)
+ break;
+ err = hw_usb_set_address((u8)le16_to_cpu(req.wValue));
+ if (err)
+ break;
+ err = isr_setup_status_phase(mEp);
+ break;
+ case USB_REQ_SET_FEATURE:
+ if (type != (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) != USB_ENDPOINT_HALT)
+ goto delegate;
+ if (req.wLength != 0)
+ break;
+ num = le16_to_cpu(req.wIndex);
+ num &= USB_ENDPOINT_NUMBER_MASK;
+
+ spin_unlock(udc->lock);
+ err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
+ spin_lock(udc->lock);
+ if (err)
+ break;
+ err = isr_setup_status_phase(mEp);
+ break;
+ default:
+delegate:
+ if (req.wLength == 0) /* no data phase */
+ mEp->dir = TX;
+
+ spin_unlock(udc->lock);
+ err = udc->driver->setup(&udc->gadget, &req);
+ spin_lock(udc->lock);
+ break;
+ }
+
+ if (err < 0) {
+ dbg_event(_usb_addr(mEp), "ERROR", err);
+
+ spin_unlock(udc->lock);
+ if (usb_ep_set_halt(&mEp->ep))
+ err("error: ep_set_halt");
+ spin_lock(udc->lock);
+ }
+ }
+}
+
+/******************************************************************************
+ * ENDPT block
+ *****************************************************************************/
+/**
+ * ep_enable: configure endpoint, making it usable
+ *
+ * Check usb_ep_enable() at "usb_gadget.h" for details
+ */
+static int ep_enable(struct usb_ep *ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int direction, retval = 0;
+ unsigned long flags;
+
+ trace("%p, %p", ep, desc);
+
+ if (ep == NULL || desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ /* only internal SW should enable ctrl endpts */
+
+ mEp->desc = desc;
+
+ if (!list_empty(&mEp->qh[mEp->dir].queue))
+ warn("enabling a non-empty endpoint!");
+
+ mEp->dir = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? TX : RX;
+ mEp->num = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+ mEp->type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+
+ mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
+
+ direction = mEp->dir;
+ do {
+ dbg_event(_usb_addr(mEp), "ENABLE", 0);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->qh[mEp->dir].ptr->cap |= QH_IOS;
+ else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
+ mEp->qh[mEp->dir].ptr->cap &= ~QH_MULT;
+ else
+ mEp->qh[mEp->dir].ptr->cap &= ~QH_ZLT;
+
+ mEp->qh[mEp->dir].ptr->cap |=
+ (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
+ mEp->qh[mEp->dir].ptr->td.next |= TD_TERMINATE; /* needed? */
+
+ retval |= hw_ep_enable(mEp->num, mEp->dir, mEp->type);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ } while (mEp->dir != direction);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_disable: endpoint is no longer usable
+ *
+ * Check usb_ep_disable() at "usb_gadget.h" for details
+ */
+static int ep_disable(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int direction, retval = 0;
+ unsigned long flags;
+
+ trace("%p", ep);
+
+ if (ep == NULL)
+ return -EINVAL;
+ else if (mEp->desc == NULL)
+ return -EBUSY;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ /* only internal SW should disable ctrl endpts */
+
+ direction = mEp->dir;
+ do {
+ dbg_event(_usb_addr(mEp), "DISABLE", 0);
+
+ retval |= _ep_nuke(mEp);
+ retval |= hw_ep_disable(mEp->num, mEp->dir);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ } while (mEp->dir != direction);
+
+ mEp->desc = NULL;
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_alloc_request: allocate a request object to use with this endpoint
+ *
+ * Check usb_ep_alloc_request() at "usb_gadget.h" for details
+ */
+static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = NULL;
+ unsigned long flags;
+
+ trace("%p, %i", ep, gfp_flags);
+
+ if (ep == NULL) {
+ err("EINVAL");
+ return NULL;
+ }
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
+ if (mReq != NULL) {
+ INIT_LIST_HEAD(&mReq->queue);
+
+ mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
+ &mReq->dma);
+ if (mReq->ptr == NULL) {
+ kfree(mReq);
+ mReq = NULL;
+ }
+ }
+
+ dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+
+ return (mReq == NULL) ? NULL : &mReq->req;
+}
+
+/**
+ * ep_free_request: frees a request object
+ *
+ * Check usb_ep_free_request() at "usb_gadget.h" for details
+ */
+static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ unsigned long flags;
+
+ trace("%p, %p", ep, req);
+
+ if (ep == NULL || req == NULL) {
+ err("EINVAL");
+ return;
+ } else if (!list_empty(&mReq->queue)) {
+ err("EBUSY");
+ return;
+ }
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ if (mReq->ptr)
+ dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
+ kfree(mReq);
+
+ dbg_event(_usb_addr(mEp), "FREE", 0);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+}
+
+/**
+ * ep_queue: queues (submits) an I/O request to an endpoint
+ *
+ * Check usb_ep_queue()* at usb_gadget.h" for details
+ */
+static int ep_queue(struct usb_ep *ep, struct usb_request *req,
+ gfp_t __maybe_unused gfp_flags)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ int retval = 0;
+ unsigned long flags;
+
+ trace("%p, %p, %X", ep, req, gfp_flags);
+
+ if (ep == NULL || req == NULL || mEp->desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL &&
+ !list_empty(&mEp->qh[mEp->dir].queue)) {
+ _ep_nuke(mEp);
+ retval = -EOVERFLOW;
+ warn("endpoint ctrl %X nuked", _usb_addr(mEp));
+ }
+
+ /* first nuke then test link, e.g. previous status has not sent */
+ if (!list_empty(&mReq->queue)) {
+ retval = -EBUSY;
+ err("request already in queue");
+ goto done;
+ }
+
+ if (req->length > (4 * PAGE_SIZE)) {
+ req->length = (4 * PAGE_SIZE);
+ retval = -EMSGSIZE;
+ warn("request length truncated");
+ }
+
+ dbg_queue(_usb_addr(mEp), req, retval);
+
+ /* push request */
+ mReq->req.status = -EINPROGRESS;
+ mReq->req.actual = 0;
+ list_add_tail(&mReq->queue, &mEp->qh[mEp->dir].queue);
+
+ retval = _hardware_enqueue(mEp, mReq);
+ if (retval == -EALREADY || retval == -EBUSY) {
+ dbg_event(_usb_addr(mEp), "QUEUE", retval);
+ retval = 0;
+ }
+
+ done:
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
+ *
+ * Check usb_ep_dequeue() at "usb_gadget.h" for details
+ */
+static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ unsigned long flags;
+
+ trace("%p, %p", ep, req);
+
+ if (ep == NULL || req == NULL || mEp->desc == NULL ||
+ list_empty(&mReq->queue) || list_empty(&mEp->qh[mEp->dir].queue))
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
+
+ if (mReq->req.status == -EALREADY)
+ _hardware_dequeue(mEp, mReq);
+
+ /* pop request */
+ list_del_init(&mReq->queue);
+ req->status = -ECONNRESET;
+
+ if (!mReq->req.no_interrupt && mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return 0;
+}
+
+/**
+ * ep_set_halt: sets the endpoint halt feature
+ *
+ * Check usb_ep_set_halt() at "usb_gadget.h" for details
+ */
+static int ep_set_halt(struct usb_ep *ep, int value)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int direction, retval = 0;
+ unsigned long flags;
+
+ trace("%p, %i", ep, value);
+
+ if (ep == NULL || mEp->desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+#ifndef STALL_IN
+ /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
+ if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
+ !list_empty(&mEp->qh[mEp->dir].queue)) {
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return -EAGAIN;
+ }
+#endif
+
+ direction = mEp->dir;
+ do {
+ dbg_event(_usb_addr(mEp), "HALT", value);
+ retval |= hw_ep_set_halt(mEp->num, mEp->dir, value);
+
+ if (!value)
+ mEp->wedge = 0;
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ } while (mEp->dir != direction);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_set_wedge: sets the halt feature and ignores clear requests
+ *
+ * Check usb_ep_set_wedge() at "usb_gadget.h" for details
+ */
+static int ep_set_wedge(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ unsigned long flags;
+
+ trace("%p", ep);
+
+ if (ep == NULL || mEp->desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "WEDGE", 0);
+ mEp->wedge = 1;
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+
+ return usb_ep_set_halt(ep);
+}
+
+/**
+ * ep_fifo_flush: flushes contents of a fifo
+ *
+ * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
+ */
+static void ep_fifo_flush(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ unsigned long flags;
+
+ trace("%p", ep);
+
+ if (ep == NULL) {
+ err("%02X: -EINVAL", _usb_addr(mEp));
+ return;
+ }
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "FFLUSH", 0);
+ hw_ep_flush(mEp->num, mEp->dir);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+}
+
+/**
+ * Endpoint-specific part of the API to the USB controller hardware
+ * Check "usb_gadget.h" for details
+ */
+static const struct usb_ep_ops usb_ep_ops = {
+ .enable = ep_enable,
+ .disable = ep_disable,
+ .alloc_request = ep_alloc_request,
+ .free_request = ep_free_request,
+ .queue = ep_queue,
+ .dequeue = ep_dequeue,
+ .set_halt = ep_set_halt,
+ .set_wedge = ep_set_wedge,
+ .fifo_flush = ep_fifo_flush,
+};
+
+/******************************************************************************
+ * GADGET block
+ *****************************************************************************/
+/**
+ * Device operations part of the API to the USB controller hardware,
+ * which don't involve endpoints (or i/o)
+ * Check "usb_gadget.h" for details
+ */
+static const struct usb_gadget_ops usb_gadget_ops;
+
+/**
+ * usb_gadget_register_driver: register a gadget driver
+ *
+ * Check usb_gadget_register_driver() at "usb_gadget.h" for details
+ * Interrupts are enabled here
+ */
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ struct ci13xxx *udc = _udc;
+ unsigned long i, k, flags;
+ int retval = -ENOMEM;
+
+ trace("%p", driver);
+
+ if (driver == NULL ||
+ driver->bind == NULL ||
+ driver->unbind == NULL ||
+ driver->setup == NULL ||
+ driver->disconnect == NULL ||
+ driver->suspend == NULL ||
+ driver->resume == NULL)
+ return -EINVAL;
+ else if (udc == NULL)
+ return -ENODEV;
+ else if (udc->driver != NULL)
+ return -EBUSY;
+
+ /* alloc resources */
+ udc->qh_pool = dma_pool_create("ci13xxx_qh", &udc->gadget.dev,
+ sizeof(struct ci13xxx_qh),
+ 64, PAGE_SIZE);
+ if (udc->qh_pool == NULL)
+ return -ENOMEM;
+
+ udc->td_pool = dma_pool_create("ci13xxx_td", &udc->gadget.dev,
+ sizeof(struct ci13xxx_td),
+ 64, PAGE_SIZE);
+ if (udc->td_pool == NULL) {
+ dma_pool_destroy(udc->qh_pool);
+ udc->qh_pool = NULL;
+ return -ENOMEM;
+ }
+
+ spin_lock_irqsave(udc->lock, flags);
+
+ info("hw_ep_max = %d", hw_ep_max);
+
+ udc->driver = driver;
+ udc->gadget.ops = NULL;
+ udc->gadget.dev.driver = NULL;
+
+ retval = 0;
+ for (i = 0; i < hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+
+ scnprintf(mEp->name, sizeof(mEp->name), "ep%i", (int)i);
+
+ mEp->lock = udc->lock;
+ mEp->device = &udc->gadget.dev;
+ mEp->td_pool = udc->td_pool;
+
+ mEp->ep.name = mEp->name;
+ mEp->ep.ops = &usb_ep_ops;
+ mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
+
+ /* this allocation cannot be random */
+ for (k = RX; k <= TX; k++) {
+ INIT_LIST_HEAD(&mEp->qh[k].queue);
+ mEp->qh[k].ptr = dma_pool_alloc(udc->qh_pool,
+ GFP_KERNEL,
+ &mEp->qh[k].dma);
+ if (mEp->qh[k].ptr == NULL)
+ retval = -ENOMEM;
+ else
+ memset(mEp->qh[k].ptr, 0,
+ sizeof(*mEp->qh[k].ptr));
+ }
+ if (i == 0)
+ udc->gadget.ep0 = &mEp->ep;
+ else
+ list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
+ }
+ if (retval)
+ goto done;
+
+ /* bind gadget */
+ driver->driver.bus = NULL;
+ udc->gadget.ops = &usb_gadget_ops;
+ udc->gadget.dev.driver = &driver->driver;
+
+ spin_unlock_irqrestore(udc->lock, flags);
+ retval = driver->bind(&udc->gadget); /* MAY SLEEP */
+ spin_lock_irqsave(udc->lock, flags);
+
+ if (retval) {
+ udc->gadget.ops = NULL;
+ udc->gadget.dev.driver = NULL;
+ goto done;
+ }
+
+ retval = hw_device_state(udc->ci13xxx_ep[0].qh[RX].dma);
+
+ done:
+ spin_unlock_irqrestore(udc->lock, flags);
+ if (retval)
+ usb_gadget_unregister_driver(driver);
+ return retval;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+/**
+ * usb_gadget_unregister_driver: unregister a gadget driver
+ *
+ * Check usb_gadget_unregister_driver() at "usb_gadget.h" for details
+ */
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct ci13xxx *udc = _udc;
+ unsigned long i, k, flags;
+
+ trace("%p", driver);
+
+ if (driver == NULL ||
+ driver->bind == NULL ||
+ driver->unbind == NULL ||
+ driver->setup == NULL ||
+ driver->disconnect == NULL ||
+ driver->suspend == NULL ||
+ driver->resume == NULL ||
+ driver != udc->driver)
+ return -EINVAL;
+
+ spin_lock_irqsave(udc->lock, flags);
+
+ hw_device_state(0);
+
+ /* unbind gadget */
+ if (udc->gadget.ops != NULL) {
+ _gadget_stop_activity(&udc->gadget);
+
+ spin_unlock_irqrestore(udc->lock, flags);
+ driver->unbind(&udc->gadget); /* MAY SLEEP */
+ spin_lock_irqsave(udc->lock, flags);
+
+ udc->gadget.ops = NULL;
+ udc->gadget.dev.driver = NULL;
+ }
+
+ /* free resources */
+ for (i = 0; i < hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+
+ if (i == 0)
+ udc->gadget.ep0 = NULL;
+ else if (!list_empty(&mEp->ep.ep_list))
+ list_del_init(&mEp->ep.ep_list);
+
+ for (k = RX; k <= TX; k++)
+ if (mEp->qh[k].ptr != NULL)
+ dma_pool_free(udc->qh_pool,
+ mEp->qh[k].ptr, mEp->qh[k].dma);
+ }
+
+ udc->driver = NULL;
+
+ spin_unlock_irqrestore(udc->lock, flags);
+
+ if (udc->td_pool != NULL) {
+ dma_pool_destroy(udc->td_pool);
+ udc->td_pool = NULL;
+ }
+ if (udc->qh_pool != NULL) {
+ dma_pool_destroy(udc->qh_pool);
+ udc->qh_pool = NULL;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+/******************************************************************************
+ * BUS block
+ *****************************************************************************/
+/**
+ * udc_irq: global interrupt handler
+ *
+ * This function returns IRQ_HANDLED if the IRQ has been handled
+ * It locks access to registers
+ */
+static irqreturn_t udc_irq(void)
+{
+ struct ci13xxx *udc = _udc;
+ irqreturn_t retval;
+ u32 intr;
+
+ trace();
+
+ if (udc == NULL) {
+ err("ENODEV");
+ return IRQ_HANDLED;
+ }
+
+ spin_lock(udc->lock);
+ intr = hw_test_and_clear_intr_active();
+ if (intr) {
+ isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
+ isr_statistics.hndl.idx &= ISR_MASK;
+ isr_statistics.hndl.cnt++;
+
+ /* order defines priority - do NOT change it */
+ if (USBi_URI & intr) {
+ isr_statistics.uri++;
+ isr_reset_handler(udc);
+ }
+ if (USBi_PCI & intr) {
+ isr_statistics.pci++;
+ udc->gadget.speed = hw_port_is_high_speed() ?
+ USB_SPEED_HIGH : USB_SPEED_FULL;
+ }
+ if (USBi_UEI & intr)
+ isr_statistics.uei++;
+ if (USBi_UI & intr) {
+ isr_statistics.ui++;
+ isr_tr_complete_handler(udc);
+ }
+ if (USBi_SLI & intr)
+ isr_statistics.sli++;
+ retval = IRQ_HANDLED;
+ } else {
+ isr_statistics.none++;
+ retval = IRQ_NONE;
+ }
+ spin_unlock(udc->lock);
+
+ return retval;
+}
+
+/**
+ * udc_release: driver release function
+ * @dev: device
+ *
+ * Currently does nothing
+ */
+static void udc_release(struct device *dev)
+{
+ trace("%p", dev);
+
+ if (dev == NULL)
+ err("EINVAL");
+}
+
+/**
+ * udc_probe: parent probe must call this to initialize UDC
+ * @dev: parent device
+ * @regs: registers base address
+ * @name: driver name
+ *
+ * This function returns an error code
+ * No interrupts active, the IRQ has not been requested yet
+ * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
+ */
+static int udc_probe(struct device *dev, void __iomem *regs, const char *name)
+{
+ struct ci13xxx *udc;
+ int retval = 0;
+
+ trace("%p, %p, %p", dev, regs, name);
+
+ if (dev == NULL || regs == NULL || name == NULL)
+ return -EINVAL;
+
+ udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
+ if (udc == NULL)
+ return -ENOMEM;
+
+ udc->lock = &udc_lock;
+
+ retval = hw_device_reset(regs);
+ if (retval)
+ goto done;
+
+ udc->gadget.ops = NULL;
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->gadget.is_dualspeed = 1;
+ udc->gadget.is_otg = 0;
+ udc->gadget.name = name;
+
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+ udc->gadget.ep0 = NULL;
+
+ strcpy(udc->gadget.dev.bus_id, "gadget");
+ udc->gadget.dev.dma_mask = dev->dma_mask;
+ udc->gadget.dev.parent = dev;
+ udc->gadget.dev.release = udc_release;
+
+ retval = device_register(&udc->gadget.dev);
+ if (retval)
+ goto done;
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+ retval = dbg_create_files(&udc->gadget.dev);
+#endif
+ if (retval) {
+ device_unregister(&udc->gadget.dev);
+ goto done;
+ }
+
+ _udc = udc;
+ return retval;
+
+ done:
+ err("error = %i", retval);
+ kfree(udc);
+ _udc = NULL;
+ return retval;
+}
+
+/**
+ * udc_remove: parent remove must call this to remove UDC
+ *
+ * No interrupts active, the IRQ has been released
+ */
+static void udc_remove(void)
+{
+ struct ci13xxx *udc = _udc;
+
+ if (udc == NULL) {
+ err("EINVAL");
+ return;
+ }
+
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+ dbg_remove_files(&udc->gadget.dev);
+#endif
+ device_unregister(&udc->gadget.dev);
+
+ kfree(udc);
+ _udc = NULL;
+}
+
+/******************************************************************************
+ * PCI block
+ *****************************************************************************/
+/**
+ * ci13xxx_pci_irq: interrut handler
+ * @irq: irq number
+ * @pdev: USB Device Controller interrupt source
+ *
+ * This function returns IRQ_HANDLED if the IRQ has been handled
+ * This is an ISR don't trace, use attribute interface instead
+ */
+static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
+{
+ if (irq == 0) {
+ dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
+ return IRQ_HANDLED;
+ }
+ return udc_irq();
+}
+
+/**
+ * ci13xxx_pci_probe: PCI probe
+ * @pdev: USB device controller being probed
+ * @id: PCI hotplug ID connecting controller to UDC framework
+ *
+ * This function returns an error code
+ * Allocates basic PCI resources for this USB device controller, and then
+ * invokes the udc_probe() method to start the UDC associated with it
+ */
+static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ void __iomem *regs = NULL;
+ int retval = 0;
+
+ if (id == NULL)
+ return -EINVAL;
+
+ retval = pci_enable_device(pdev);
+ if (retval)
+ goto done;
+
+ if (!pdev->irq) {
+ dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
+ retval = -ENODEV;
+ goto disable_device;
+ }
+
+ retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
+ if (retval)
+ goto disable_device;
+
+ /* BAR 0 holds all the registers */
+ regs = pci_iomap(pdev, 0, 0);
+ if (!regs) {
+ dev_err(&pdev->dev, "Error mapping memory!");
+ retval = -EFAULT;
+ goto release_regions;
+ }
+ pci_set_drvdata(pdev, (__force void *)regs);
+
+ pci_set_master(pdev);
+ pci_try_set_mwi(pdev);
+
+ retval = udc_probe(&pdev->dev, regs, UDC_DRIVER_NAME);
+ if (retval)
+ goto iounmap;
+
+ /* our device does not have MSI capability */
+
+ retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
+ UDC_DRIVER_NAME, pdev);
+ if (retval)
+ goto gadget_remove;
+
+ return 0;
+
+ gadget_remove:
+ udc_remove();
+ iounmap:
+ pci_iounmap(pdev, regs);
+ release_regions:
+ pci_release_regions(pdev);
+ disable_device:
+ pci_disable_device(pdev);
+ done:
+ return retval;
+}
+
+/**
+ * ci13xxx_pci_remove: PCI remove
+ * @pdev: USB Device Controller being removed
+ *
+ * Reverses the effect of ci13xxx_pci_probe(),
+ * first invoking the udc_remove() and then releases
+ * all PCI resources allocated for this USB device controller
+ */
+static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
+{
+ free_irq(pdev->irq, pdev);
+ udc_remove();
+ pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+/**
+ * PCI device table
+ * PCI device structure
+ *
+ * Check "pci.h" for details
+ */
+static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
+ { PCI_DEVICE(0x153F, 0x1004) },
+ { PCI_DEVICE(0x153F, 0x1006) },
+ { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
+
+static struct pci_driver ci13xxx_pci_driver = {
+ .name = UDC_DRIVER_NAME,
+ .id_table = ci13xxx_pci_id_table,
+ .probe = ci13xxx_pci_probe,
+ .remove = __devexit_p(ci13xxx_pci_remove),
+};
+
+/**
+ * ci13xxx_pci_init: module init
+ *
+ * Driver load
+ */
+static int __init ci13xxx_pci_init(void)
+{
+ return pci_register_driver(&ci13xxx_pci_driver);
+}
+module_init(ci13xxx_pci_init);
+
+/**
+ * ci13xxx_pci_exit: module exit
+ *
+ * Driver unload
+ */
+static void __exit ci13xxx_pci_exit(void)
+{
+ pci_unregister_driver(&ci13xxx_pci_driver);
+}
+module_exit(ci13xxx_pci_exit);
+
+MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
+MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("June 2008");
diff --git a/drivers/usb/gadget/ci13xxx_udc.h b/drivers/usb/gadget/ci13xxx_udc.h
new file mode 100644
index 000000000000..4026e9cede34
--- /dev/null
+++ b/drivers/usb/gadget/ci13xxx_udc.h
@@ -0,0 +1,195 @@
+/*
+ * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Description: MIPS USB IP core family device controller
+ * Structures, registers and logging macros
+ */
+
+#ifndef _CI13XXX_h_
+#define _CI13XXX_h_
+
+/******************************************************************************
+ * DEFINE
+ *****************************************************************************/
+#define ENDPT_MAX (16)
+#define CTRL_PAYLOAD_MAX (64)
+#define RX (0) /* similar to USB_DIR_OUT but can be used as an index */
+#define TX (1) /* similar to USB_DIR_IN but can be used as an index */
+
+/******************************************************************************
+ * STRUCTURES
+ *****************************************************************************/
+/* DMA layout of transfer descriptors */
+struct ci13xxx_td {
+ /* 0 */
+ u32 next;
+#define TD_TERMINATE BIT(0)
+ /* 1 */
+ u32 token;
+#define TD_STATUS (0x00FFUL << 0)
+#define TD_STATUS_TR_ERR BIT(3)
+#define TD_STATUS_DT_ERR BIT(5)
+#define TD_STATUS_HALTED BIT(6)
+#define TD_STATUS_ACTIVE BIT(7)
+#define TD_MULTO (0x0003UL << 10)
+#define TD_IOC BIT(15)
+#define TD_TOTAL_BYTES (0x7FFFUL << 16)
+ /* 2 */
+ u32 page[5];
+#define TD_CURR_OFFSET (0x0FFFUL << 0)
+#define TD_FRAME_NUM (0x07FFUL << 0)
+#define TD_RESERVED_MASK (0x0FFFUL << 0)
+} __attribute__ ((packed));
+
+/* DMA layout of queue heads */
+struct ci13xxx_qh {
+ /* 0 */
+ u32 cap;
+#define QH_IOS BIT(15)
+#define QH_MAX_PKT (0x07FFUL << 16)
+#define QH_ZLT BIT(29)
+#define QH_MULT (0x0003UL << 30)
+ /* 1 */
+ u32 curr;
+ /* 2 - 8 */
+ struct ci13xxx_td td;
+ /* 9 */
+ u32 RESERVED;
+ struct usb_ctrlrequest setup;
+} __attribute__ ((packed));
+
+/* Extension of usb_request */
+struct ci13xxx_req {
+ struct usb_request req;
+ unsigned map;
+ struct list_head queue;
+ struct ci13xxx_td *ptr;
+ dma_addr_t dma;
+};
+
+/* Extension of usb_ep */
+struct ci13xxx_ep {
+ struct usb_ep ep;
+ const struct usb_endpoint_descriptor *desc;
+ u8 dir;
+ u8 num;
+ u8 type;
+ char name[16];
+ struct {
+ struct list_head queue;
+ struct ci13xxx_qh *ptr;
+ dma_addr_t dma;
+ } qh[2];
+ struct usb_request *status;
+ int wedge;
+
+ /* global resources */
+ spinlock_t *lock;
+ struct device *device;
+ struct dma_pool *td_pool;
+};
+
+/* CI13XXX UDC descriptor & global resources */
+struct ci13xxx {
+ spinlock_t *lock; /* ctrl register bank access */
+
+ struct dma_pool *qh_pool; /* DMA pool for queue heads */
+ struct dma_pool *td_pool; /* DMA pool for transfer descs */
+
+ struct usb_gadget gadget; /* USB slave device */
+ struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
+
+ struct usb_gadget_driver *driver; /* 3rd party gadget driver */
+};
+
+/******************************************************************************
+ * REGISTERS
+ *****************************************************************************/
+/* register size */
+#define REG_BITS (32)
+
+/* HCCPARAMS */
+#define HCCPARAMS_LEN BIT(17)
+
+/* DCCPARAMS */
+#define DCCPARAMS_DEN (0x1F << 0)
+#define DCCPARAMS_DC BIT(7)
+
+/* TESTMODE */
+#define TESTMODE_FORCE BIT(0)
+
+/* USBCMD */
+#define USBCMD_RS BIT(0)
+#define USBCMD_RST BIT(1)
+#define USBCMD_SUTW BIT(13)
+
+/* USBSTS & USBINTR */
+#define USBi_UI BIT(0)
+#define USBi_UEI BIT(1)
+#define USBi_PCI BIT(2)
+#define USBi_URI BIT(6)
+#define USBi_SLI BIT(8)
+
+/* DEVICEADDR */
+#define DEVICEADDR_USBADRA BIT(24)
+#define DEVICEADDR_USBADR (0x7FUL << 25)
+
+/* PORTSC */
+#define PORTSC_SUSP BIT(7)
+#define PORTSC_HSP BIT(9)
+#define PORTSC_PTC (0x0FUL << 16)
+
+/* DEVLC */
+#define DEVLC_PSPD (0x03UL << 25)
+#define DEVLC_PSPD_HS (0x02UL << 25)
+
+/* USBMODE */
+#define USBMODE_CM (0x03UL << 0)
+#define USBMODE_CM_IDLE (0x00UL << 0)
+#define USBMODE_CM_DEVICE (0x02UL << 0)
+#define USBMODE_CM_HOST (0x03UL << 0)
+#define USBMODE_SLOM BIT(3)
+
+/* ENDPTCTRL */
+#define ENDPTCTRL_RXS BIT(0)
+#define ENDPTCTRL_RXT (0x03UL << 2)
+#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
+#define ENDPTCTRL_RXE BIT(7)
+#define ENDPTCTRL_TXS BIT(16)
+#define ENDPTCTRL_TXT (0x03UL << 18)
+#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
+#define ENDPTCTRL_TXE BIT(23)
+
+/******************************************************************************
+ * LOGGING
+ *****************************************************************************/
+#define ci13xxx_printk(level, format, args...) \
+do { \
+ if (_udc == NULL) \
+ printk(level "[%s] " format "\n", __func__, ## args); \
+ else \
+ dev_printk(level, _udc->gadget.dev.parent, \
+ "[%s] " format "\n", __func__, ## args); \
+} while (0)
+
+#define err(format, args...) ci13xxx_printk(KERN_ERR, format, ## args)
+#define warn(format, args...) ci13xxx_printk(KERN_WARNING, format, ## args)
+#define info(format, args...) ci13xxx_printk(KERN_INFO, format, ## args)
+
+#ifdef TRACE
+#define trace(format, args...) ci13xxx_printk(KERN_DEBUG, format, ## args)
+#define dbg_trace(format, args...) dev_dbg(dev, format, ##args)
+#else
+#define trace(format, args...) do {} while (0)
+#define dbg_trace(format, args...) do {} while (0)
+#endif
+
+#endif /* _CI13XXX_h_ */
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 9462e30192d8..a36b1175b18d 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -161,7 +161,7 @@ ep_matches (
/* report address */
desc->bEndpointAddress &= USB_DIR_IN;
if (isdigit (ep->name [2])) {
- u8 num = simple_strtol (&ep->name [2], NULL, 10);
+ u8 num = simple_strtoul (&ep->name [2], NULL, 10);
desc->bEndpointAddress |= num;
#ifdef MANY_ENDPOINTS
} else if (desc->bEndpointAddress & USB_DIR_IN) {
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 2e71368f45b4..b10fa31cc915 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -1,7 +1,7 @@
/*
* file_storage.c -- File-backed USB Storage Gadget, for USB development
*
- * Copyright (C) 2003-2007 Alan Stern
+ * Copyright (C) 2003-2008 Alan Stern
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -38,16 +38,17 @@
/*
* The File-backed Storage Gadget acts as a USB Mass Storage device,
- * appearing to the host as a disk drive. In addition to providing an
- * example of a genuinely useful gadget driver for a USB device, it also
- * illustrates a technique of double-buffering for increased throughput.
- * Last but not least, it gives an easy way to probe the behavior of the
- * Mass Storage drivers in a USB host.
+ * appearing to the host as a disk drive or as a CD-ROM drive. In addition
+ * to providing an example of a genuinely useful gadget driver for a USB
+ * device, it also illustrates a technique of double-buffering for increased
+ * throughput. Last but not least, it gives an easy way to probe the
+ * behavior of the Mass Storage drivers in a USB host.
*
* Backing storage is provided by a regular file or a block device, specified
* by the "file" module parameter. Access can be limited to read-only by
- * setting the optional "ro" module parameter. The gadget will indicate that
- * it has removable media if the optional "removable" module parameter is set.
+ * setting the optional "ro" module parameter. (For CD-ROM emulation,
+ * access is always read-only.) The gadget will indicate that it has
+ * removable media if the optional "removable" module parameter is set.
*
* The gadget supports the Control-Bulk (CB), Control-Bulk-Interrupt (CBI),
* and Bulk-Only (also known as Bulk-Bulk-Bulk or BBB) transports, selected
@@ -64,7 +65,12 @@
* The default number of LUNs is taken from the number of "file" elements;
* it is 1 if "file" is not given. If "removable" is not set then a backing
* file must be specified for each LUN. If it is set, then an unspecified
- * or empty backing filename means the LUN's medium is not loaded.
+ * or empty backing filename means the LUN's medium is not loaded. Ideally
+ * each LUN would be settable independently as a disk drive or a CD-ROM
+ * drive, but currently all LUNs have to be the same type. The CD-ROM
+ * emulation includes a single data track and no audio tracks; hence there
+ * need be only one backing file per LUN. Note also that the CD-ROM block
+ * length is set to 512 rather than the more common value 2048.
*
* Requirements are modest; only a bulk-in and a bulk-out endpoint are
* needed (an interrupt-out endpoint is also needed for CBI). The memory
@@ -91,6 +97,8 @@
* USB device controller (usually true),
* boolean to permit the driver to halt
* bulk endpoints
+ * cdrom Default false, boolean for whether to emulate
+ * a CD-ROM drive
* transport=XXX Default BBB, transport name (CB, CBI, or BBB)
* protocol=YYY Default SCSI, protocol name (RBC, 8020 or
* ATAPI, QIC, UFI, 8070, or SCSI;
@@ -103,15 +111,16 @@
* PAGE_CACHE_SIZE)
*
* If CONFIG_USB_FILE_STORAGE_TEST is not set, only the "file", "ro",
- * "removable", "luns", and "stall" options are available; default values
- * are used for everything else.
+ * "removable", "luns", "stall", and "cdrom" options are available; default
+ * values are used for everything else.
*
* The pathnames of the backing files and the ro settings are available in
* the attribute files "file" and "ro" in the lun<n> subdirectory of the
* gadget's sysfs directory. If the "removable" option is set, writing to
* these files will simulate ejecting/loading the medium (writing an empty
* line means eject) and adjusting a write-enable tab. Changes to the ro
- * setting are not allowed when the medium is loaded.
+ * setting are not allowed when the medium is loaded or if CD-ROM emulation
+ * is being used.
*
* This gadget driver is heavily based on "Gadget Zero" by David Brownell.
* The driver's SCSI command interface was based on the "Information
@@ -261,7 +270,7 @@
#define DRIVER_DESC "File-backed Storage Gadget"
#define DRIVER_NAME "g_file_storage"
-#define DRIVER_VERSION "7 August 2007"
+#define DRIVER_VERSION "20 November 2008"
static const char longname[] = DRIVER_DESC;
static const char shortname[] = DRIVER_NAME;
@@ -341,6 +350,7 @@ static struct {
int removable;
int can_stall;
+ int cdrom;
char *transport_parm;
char *protocol_parm;
@@ -359,6 +369,7 @@ static struct {
.protocol_parm = "SCSI",
.removable = 0,
.can_stall = 1,
+ .cdrom = 0,
.vendor = DRIVER_VENDOR_ID,
.product = DRIVER_PRODUCT_ID,
.release = 0xffff, // Use controller chip type
@@ -382,6 +393,9 @@ MODULE_PARM_DESC(removable, "true to simulate removable media");
module_param_named(stall, mod_data.can_stall, bool, S_IRUGO);
MODULE_PARM_DESC(stall, "false to prevent bulk stalls");
+module_param_named(cdrom, mod_data.cdrom, bool, S_IRUGO);
+MODULE_PARM_DESC(cdrom, "true to emulate cdrom instead of disk");
+
/* In the non-TEST version, only the module parameters listed above
* are available. */
@@ -411,6 +425,10 @@ MODULE_PARM_DESC(buflen, "I/O buffer size");
/*-------------------------------------------------------------------------*/
+/* SCSI device types */
+#define TYPE_DISK 0x00
+#define TYPE_CDROM 0x05
+
/* USB protocol value = the transport method */
#define USB_PR_CBI 0x00 // Control/Bulk/Interrupt
#define USB_PR_CB 0x01 // Control/Bulk w/o interrupt
@@ -487,6 +505,8 @@ struct interrupt_data {
#define SC_READ_12 0xa8
#define SC_READ_CAPACITY 0x25
#define SC_READ_FORMAT_CAPACITIES 0x23
+#define SC_READ_HEADER 0x44
+#define SC_READ_TOC 0x43
#define SC_RELEASE 0x17
#define SC_REQUEST_SENSE 0x03
#define SC_RESERVE 0x16
@@ -2006,23 +2026,28 @@ static int do_inquiry(struct fsg_dev *fsg, struct fsg_buffhd *bh)
u8 *buf = (u8 *) bh->buf;
static char vendor_id[] = "Linux ";
- static char product_id[] = "File-Stor Gadget";
+ static char product_disk_id[] = "File-Stor Gadget";
+ static char product_cdrom_id[] = "File-CD Gadget ";
if (!fsg->curlun) { // Unsupported LUNs are okay
fsg->bad_lun_okay = 1;
memset(buf, 0, 36);
buf[0] = 0x7f; // Unsupported, no device-type
+ buf[4] = 31; // Additional length
return 36;
}
- memset(buf, 0, 8); // Non-removable, direct-access device
+ memset(buf, 0, 8);
+ buf[0] = (mod_data.cdrom ? TYPE_CDROM : TYPE_DISK);
if (mod_data.removable)
buf[1] = 0x80;
buf[2] = 2; // ANSI SCSI level 2
buf[3] = 2; // SCSI-2 INQUIRY data format
buf[4] = 31; // Additional length
// No special options
- sprintf(buf + 8, "%-8s%-16s%04x", vendor_id, product_id,
+ sprintf(buf + 8, "%-8s%-16s%04x", vendor_id,
+ (mod_data.cdrom ? product_cdrom_id :
+ product_disk_id),
mod_data.release);
return 36;
}
@@ -2101,6 +2126,75 @@ static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
}
+static void store_cdrom_address(u8 *dest, int msf, u32 addr)
+{
+ if (msf) {
+ /* Convert to Minutes-Seconds-Frames */
+ addr >>= 2; /* Convert to 2048-byte frames */
+ addr += 2*75; /* Lead-in occupies 2 seconds */
+ dest[3] = addr % 75; /* Frames */
+ addr /= 75;
+ dest[2] = addr % 60; /* Seconds */
+ addr /= 60;
+ dest[1] = addr; /* Minutes */
+ dest[0] = 0; /* Reserved */
+ } else {
+ /* Absolute sector */
+ put_be32(dest, addr);
+ }
+}
+
+static int do_read_header(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+ struct lun *curlun = fsg->curlun;
+ int msf = fsg->cmnd[1] & 0x02;
+ u32 lba = get_be32(&fsg->cmnd[2]);
+ u8 *buf = (u8 *) bh->buf;
+
+ if ((fsg->cmnd[1] & ~0x02) != 0) { /* Mask away MSF */
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+ if (lba >= curlun->num_sectors) {
+ curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
+ return -EINVAL;
+ }
+
+ memset(buf, 0, 8);
+ buf[0] = 0x01; /* 2048 bytes of user data, rest is EC */
+ store_cdrom_address(&buf[4], msf, lba);
+ return 8;
+}
+
+
+static int do_read_toc(struct fsg_dev *fsg, struct fsg_buffhd *bh)
+{
+ struct lun *curlun = fsg->curlun;
+ int msf = fsg->cmnd[1] & 0x02;
+ int start_track = fsg->cmnd[6];
+ u8 *buf = (u8 *) bh->buf;
+
+ if ((fsg->cmnd[1] & ~0x02) != 0 || /* Mask away MSF */
+ start_track > 1) {
+ curlun->sense_data = SS_INVALID_FIELD_IN_CDB;
+ return -EINVAL;
+ }
+
+ memset(buf, 0, 20);
+ buf[1] = (20-2); /* TOC data length */
+ buf[2] = 1; /* First track number */
+ buf[3] = 1; /* Last track number */
+ buf[5] = 0x16; /* Data track, copying allowed */
+ buf[6] = 0x01; /* Only track is number 1 */
+ store_cdrom_address(&buf[8], msf, 0);
+
+ buf[13] = 0x16; /* Lead-out track is data */
+ buf[14] = 0xAA; /* Lead-out track number */
+ store_cdrom_address(&buf[16], msf, curlun->num_sectors);
+ return 20;
+}
+
+
static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
{
struct lun *curlun = fsg->curlun;
@@ -2848,6 +2942,26 @@ static int do_scsi_command(struct fsg_dev *fsg)
reply = do_read_capacity(fsg, bh);
break;
+ case SC_READ_HEADER:
+ if (!mod_data.cdrom)
+ goto unknown_cmnd;
+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ (3<<7) | (0x1f<<1), 1,
+ "READ HEADER")) == 0)
+ reply = do_read_header(fsg, bh);
+ break;
+
+ case SC_READ_TOC:
+ if (!mod_data.cdrom)
+ goto unknown_cmnd;
+ fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+ if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+ (7<<6) | (1<<1), 1,
+ "READ TOC")) == 0)
+ reply = do_read_toc(fsg, bh);
+ break;
+
case SC_READ_FORMAT_CAPACITIES:
fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
@@ -2933,6 +3047,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
// Fall through
default:
+ unknown_cmnd:
fsg->data_size_from_cmnd = 0;
sprintf(unknown, "Unknown x%02x", fsg->cmnd[0]);
if ((reply = check_command(fsg, fsg->cmnd_size,
@@ -3498,6 +3613,7 @@ static int open_backing_file(struct lun *curlun, const char *filename)
struct inode *inode = NULL;
loff_t size;
loff_t num_sectors;
+ loff_t min_sectors;
/* R/W if we can, R/O if we must */
ro = curlun->ro;
@@ -3541,8 +3657,19 @@ static int open_backing_file(struct lun *curlun, const char *filename)
rc = (int) size;
goto out;
}
- num_sectors = size >> 9; // File size in 512-byte sectors
- if (num_sectors == 0) {
+ num_sectors = size >> 9; // File size in 512-byte blocks
+ min_sectors = 1;
+ if (mod_data.cdrom) {
+ num_sectors &= ~3; // Reduce to a multiple of 2048
+ min_sectors = 300*4; // Smallest track is 300 frames
+ if (num_sectors >= 256*60*75*4) {
+ num_sectors = (256*60*75 - 1) * 4;
+ LINFO(curlun, "file too big: %s\n", filename);
+ LINFO(curlun, "using only first %d blocks\n",
+ (int) num_sectors);
+ }
+ }
+ if (num_sectors < min_sectors) {
LINFO(curlun, "file too small: %s\n", filename);
rc = -ETOOSMALL;
goto out;
@@ -3845,9 +3972,12 @@ static int __init fsg_bind(struct usb_gadget *gadget)
goto out;
if (mod_data.removable) { // Enable the store_xxx attributes
- dev_attr_ro.attr.mode = dev_attr_file.attr.mode = 0644;
- dev_attr_ro.store = store_ro;
+ dev_attr_file.attr.mode = 0644;
dev_attr_file.store = store_file;
+ if (!mod_data.cdrom) {
+ dev_attr_ro.attr.mode = 0644;
+ dev_attr_ro.store = store_ro;
+ }
}
/* Find out how many LUNs there should be */
@@ -3872,6 +4002,8 @@ static int __init fsg_bind(struct usb_gadget *gadget)
for (i = 0; i < fsg->nluns; ++i) {
curlun = &fsg->luns[i];
curlun->ro = mod_data.ro[i];
+ if (mod_data.cdrom)
+ curlun->ro = 1;
curlun->dev.release = lun_release;
curlun->dev.parent = &gadget->dev;
curlun->dev.driver = &fsg_driver.driver;
@@ -4031,9 +4163,9 @@ static int __init fsg_bind(struct usb_gadget *gadget)
mod_data.protocol_name, mod_data.protocol_type);
DBG(fsg, "VendorID=x%04x, ProductID=x%04x, Release=x%04x\n",
mod_data.vendor, mod_data.product, mod_data.release);
- DBG(fsg, "removable=%d, stall=%d, buflen=%u\n",
+ DBG(fsg, "removable=%d, stall=%d, cdrom=%d, buflen=%u\n",
mod_data.removable, mod_data.can_stall,
- mod_data.buflen);
+ mod_data.cdrom, mod_data.buflen);
DBG(fsg, "I/O thread pid: %d\n", task_pid_nr(fsg->thread_task));
set_bit(REGISTERED, &fsg->atomic_bitflags);
@@ -4050,6 +4182,7 @@ out:
fsg->state = FSG_STATE_TERMINATED; // The thread is dead
fsg_unbind(gadget);
close_all_backing_files(fsg);
+ complete(&fsg->thread_notifier);
return rc;
}
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index f40272565098..d6c5bcd40064 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -26,6 +26,7 @@
#include <linux/ioport.h>
#include <linux/types.h>
#include <linux/errno.h>
+#include <linux/err.h>
#include <linux/slab.h>
#include <linux/list.h>
#include <linux/interrupt.h>
@@ -370,6 +371,9 @@ static int qe_ep_bd_init(struct qe_udc *udc, unsigned char pipe_num)
/* alloc multi-ram for BD rings and set the ep parameters */
tmp_addr = cpm_muram_alloc(sizeof(struct qe_bd) * (bdring_len +
USB_BDRING_LEN_TX), QE_ALIGNMENT_OF_BD);
+ if (IS_ERR_VALUE(tmp_addr))
+ return -ENOMEM;
+
out_be16(&epparam->rbase, (u16)tmp_addr);
out_be16(&epparam->tbase, (u16)(tmp_addr +
(sizeof(struct qe_bd) * bdring_len)));
@@ -689,7 +693,7 @@ en_done2:
en_done1:
spin_unlock_irqrestore(&udc->lock, flags);
en_done:
- dev_dbg(udc->dev, "failed to initialize %s\n", ep->ep.name);
+ dev_err(udc->dev, "failed to initialize %s\n", ep->ep.name);
return -ENODEV;
}
@@ -2408,6 +2412,8 @@ static struct qe_udc __devinit *qe_udc_config(struct of_device *ofdev)
tmp_addr = cpm_muram_alloc((USB_MAX_ENDPOINTS *
sizeof(struct usb_ep_para)),
USB_EP_PARA_ALIGNMENT);
+ if (IS_ERR_VALUE(tmp_addr))
+ goto cleanup;
for (i = 0; i < USB_MAX_ENDPOINTS; i++) {
out_be16(&usbpram->epptr[i], (u16)tmp_addr);
@@ -2513,7 +2519,7 @@ static int __devinit qe_udc_probe(struct of_device *ofdev,
/* Initialize the udc structure including QH member and other member */
udc_controller = qe_udc_config(ofdev);
if (!udc_controller) {
- dev_dbg(&ofdev->dev, "udc_controll is NULL\n");
+ dev_err(&ofdev->dev, "failed to initialize\n");
return -ENOMEM;
}
@@ -2568,7 +2574,7 @@ static int __devinit qe_udc_probe(struct of_device *ofdev,
/* create a buf for ZLP send, need to remain zeroed */
udc_controller->nullbuf = kzalloc(256, GFP_KERNEL);
if (udc_controller->nullbuf == NULL) {
- dev_dbg(udc_controller->dev, "cannot alloc nullbuf\n");
+ dev_err(udc_controller->dev, "cannot alloc nullbuf\n");
ret = -ENOMEM;
goto err3;
}
diff --git a/drivers/usb/gadget/gadget_chips.h b/drivers/usb/gadget/gadget_chips.h
index 4e3107dd2f34..ec6d439a2aa5 100644
--- a/drivers/usb/gadget/gadget_chips.h
+++ b/drivers/usb/gadget/gadget_chips.h
@@ -110,7 +110,6 @@
#define gadget_is_at91(g) 0
#endif
-/* status unclear */
#ifdef CONFIG_USB_GADGET_IMX
#define gadget_is_imx(g) !strcmp("imx_udc", (g)->name)
#else
@@ -158,6 +157,11 @@
#define gadget_is_fsl_qe(g) 0
#endif
+#ifdef CONFIG_USB_GADGET_CI13XXX
+#define gadget_is_ci13xxx(g) (!strcmp("ci13xxx_udc", (g)->name))
+#else
+#define gadget_is_ci13xxx(g) 0
+#endif
// CONFIG_USB_GADGET_SX2
// CONFIG_USB_GADGET_AU1X00
@@ -225,6 +229,8 @@ static inline int usb_gadget_controller_number(struct usb_gadget *gadget)
return 0x21;
else if (gadget_is_fsl_qe(gadget))
return 0x22;
+ else if (gadget_is_ci13xxx(gadget))
+ return 0x23;
return -ENOENT;
}
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 60aa04847b18..63419c4d503c 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1349,7 +1349,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
int retval;
if (!driver
- || driver->speed != USB_SPEED_FULL
+ || driver->speed < USB_SPEED_FULL
|| !driver->bind
|| !driver->disconnect
|| !driver->setup)
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
new file mode 100644
index 000000000000..cde8fdf15d5b
--- /dev/null
+++ b/drivers/usb/gadget/imx_udc.c
@@ -0,0 +1,1516 @@
+/*
+ * driver/usb/gadget/imx_udc.c
+ *
+ * Copyright (C) 2005 Mike Lee(eemike@gmail.com)
+ * Copyright (C) 2008 Darius Augulis <augulis.darius@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include <mach/usb.h>
+#include <mach/hardware.h>
+
+#include "imx_udc.h"
+
+static const char driver_name[] = "imx_udc";
+static const char ep0name[] = "ep0";
+
+void ep0_chg_stat(const char *label, struct imx_udc_struct *imx_usb,
+ enum ep0_state stat);
+
+/*******************************************************************************
+ * IMX UDC hardware related functions
+ *******************************************************************************
+ */
+
+void imx_udc_enable(struct imx_udc_struct *imx_usb)
+{
+ int temp = __raw_readl(imx_usb->base + USB_CTRL);
+ __raw_writel(temp | CTRL_FE_ENA | CTRL_AFE_ENA, imx_usb->base + USB_CTRL);
+ imx_usb->gadget.speed = USB_SPEED_FULL;
+}
+
+void imx_udc_disable(struct imx_udc_struct *imx_usb)
+{
+ int temp = __raw_readl(imx_usb->base + USB_CTRL);
+
+ __raw_writel(temp & ~(CTRL_FE_ENA | CTRL_AFE_ENA),
+ imx_usb->base + USB_CTRL);
+
+ ep0_chg_stat(__func__, imx_usb, EP0_IDLE);
+ imx_usb->gadget.speed = USB_SPEED_UNKNOWN;
+}
+
+void imx_udc_reset(struct imx_udc_struct *imx_usb)
+{
+ int temp = __raw_readl(imx_usb->base + USB_ENAB);
+
+ /* set RST bit */
+ __raw_writel(temp | ENAB_RST, imx_usb->base + USB_ENAB);
+
+ /* wait RST bit to clear */
+ do {} while (__raw_readl(imx_usb->base + USB_ENAB) & ENAB_RST);
+
+ /* wait CFG bit to assert */
+ do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG));
+
+ /* udc module is now ready */
+}
+
+void imx_udc_config(struct imx_udc_struct *imx_usb)
+{
+ u8 ep_conf[5];
+ u8 i, j, cfg;
+ struct imx_ep_struct *imx_ep;
+
+ /* wait CFG bit to assert */
+ do {} while (!(__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG));
+
+ /* Download the endpoint buffer for endpoint 0. */
+ for (j = 0; j < 5; j++) {
+ i = (j == 2 ? imx_usb->imx_ep[0].fifosize : 0x00);
+ __raw_writeb(i, imx_usb->base + USB_DDAT);
+ do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_BSY);
+ }
+
+ /* Download the endpoint buffers for endpoints 1-5.
+ * We specify two configurations, one interface
+ */
+ for (cfg = 1; cfg < 3; cfg++) {
+ for (i = 1; i < IMX_USB_NB_EP; i++) {
+ imx_ep = &imx_usb->imx_ep[i];
+ /* EP no | Config no */
+ ep_conf[0] = (i << 4) | (cfg << 2);
+ /* Type | Direction */
+ ep_conf[1] = (imx_ep->bmAttributes << 3) |
+ (EP_DIR(imx_ep) << 2);
+ /* Max packet size */
+ ep_conf[2] = imx_ep->fifosize;
+ /* TRXTYP */
+ ep_conf[3] = 0xC0;
+ /* FIFO no */
+ ep_conf[4] = i;
+
+ D_INI(imx_usb->dev,
+ "<%s> ep%d_conf[%d]:"
+ "[%02x-%02x-%02x-%02x-%02x]\n",
+ __func__, i, cfg,
+ ep_conf[0], ep_conf[1], ep_conf[2],
+ ep_conf[3], ep_conf[4]);
+
+ for (j = 0; j < 5; j++) {
+ __raw_writeb(ep_conf[j],
+ imx_usb->base + USB_DDAT);
+ do {} while (__raw_readl(imx_usb->base + USB_DADR)
+ & DADR_BSY);
+ }
+ }
+ }
+
+ /* wait CFG bit to clear */
+ do {} while (__raw_readl(imx_usb->base + USB_DADR) & DADR_CFG);
+}
+
+void imx_udc_init_irq(struct imx_udc_struct *imx_usb)
+{
+ int i;
+
+ /* Mask and clear all irqs */
+ __raw_writel(0xFFFFFFFF, imx_usb->base + USB_MASK);
+ __raw_writel(0xFFFFFFFF, imx_usb->base + USB_INTR);
+ for (i = 0; i < IMX_USB_NB_EP; i++) {
+ __raw_writel(0x1FF, imx_usb->base + USB_EP_MASK(i));
+ __raw_writel(0x1FF, imx_usb->base + USB_EP_INTR(i));
+ }
+
+ /* Enable USB irqs */
+ __raw_writel(INTR_MSOF | INTR_FRAME_MATCH, imx_usb->base + USB_MASK);
+
+ /* Enable EP0 irqs */
+ __raw_writel(0x1FF & ~(EPINTR_DEVREQ | EPINTR_MDEVREQ | EPINTR_EOT
+ | EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL),
+ imx_usb->base + USB_EP_MASK(0));
+}
+
+void imx_udc_init_ep(struct imx_udc_struct *imx_usb)
+{
+ int i, max, temp;
+ struct imx_ep_struct *imx_ep;
+ for (i = 0; i < IMX_USB_NB_EP; i++) {
+ imx_ep = &imx_usb->imx_ep[i];
+ switch (imx_ep->fifosize) {
+ case 8:
+ max = 0;
+ break;
+ case 16:
+ max = 1;
+ break;
+ case 32:
+ max = 2;
+ break;
+ case 64:
+ max = 3;
+ break;
+ default:
+ max = 1;
+ break;
+ }
+ temp = (EP_DIR(imx_ep) << 7) | (max << 5)
+ | (imx_ep->bmAttributes << 3);
+ __raw_writel(temp, imx_usb->base + USB_EP_STAT(i));
+ __raw_writel(temp | EPSTAT_FLUSH, imx_usb->base + USB_EP_STAT(i));
+ D_INI(imx_usb->dev, "<%s> ep%d_stat %08x\n", __func__, i,
+ __raw_readl(imx_usb->base + USB_EP_STAT(i)));
+ }
+}
+
+void imx_udc_init_fifo(struct imx_udc_struct *imx_usb)
+{
+ int i, temp;
+ struct imx_ep_struct *imx_ep;
+ for (i = 0; i < IMX_USB_NB_EP; i++) {
+ imx_ep = &imx_usb->imx_ep[i];
+
+ /* Fifo control */
+ temp = EP_DIR(imx_ep) ? 0x0B000000 : 0x0F000000;
+ __raw_writel(temp, imx_usb->base + USB_EP_FCTRL(i));
+ D_INI(imx_usb->dev, "<%s> ep%d_fctrl %08x\n", __func__, i,
+ __raw_readl(imx_usb->base + USB_EP_FCTRL(i)));
+
+ /* Fifo alarm */
+ temp = (i ? imx_ep->fifosize / 2 : 0);
+ __raw_writel(temp, imx_usb->base + USB_EP_FALRM(i));
+ D_INI(imx_usb->dev, "<%s> ep%d_falrm %08x\n", __func__, i,
+ __raw_readl(imx_usb->base + USB_EP_FALRM(i)));
+ }
+}
+
+static void imx_udc_init(struct imx_udc_struct *imx_usb)
+{
+ /* Reset UDC */
+ imx_udc_reset(imx_usb);
+
+ /* Download config to enpoint buffer */
+ imx_udc_config(imx_usb);
+
+ /* Setup interrups */
+ imx_udc_init_irq(imx_usb);
+
+ /* Setup endpoints */
+ imx_udc_init_ep(imx_usb);
+
+ /* Setup fifos */
+ imx_udc_init_fifo(imx_usb);
+}
+
+void imx_ep_irq_enable(struct imx_ep_struct *imx_ep)
+{
+
+ int i = EP_NO(imx_ep);
+
+ __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i));
+ __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i));
+ __raw_writel(0x1FF & ~(EPINTR_EOT | EPINTR_EOF),
+ imx_ep->imx_usb->base + USB_EP_MASK(i));
+}
+
+void imx_ep_irq_disable(struct imx_ep_struct *imx_ep)
+{
+
+ int i = EP_NO(imx_ep);
+
+ __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_MASK(i));
+ __raw_writel(0x1FF, imx_ep->imx_usb->base + USB_EP_INTR(i));
+}
+
+int imx_ep_empty(struct imx_ep_struct *imx_ep)
+{
+ struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
+
+ return __raw_readl(imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep)))
+ & FSTAT_EMPTY;
+}
+
+unsigned imx_fifo_bcount(struct imx_ep_struct *imx_ep)
+{
+ struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
+
+ return (__raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)))
+ & EPSTAT_BCOUNT) >> 16;
+}
+
+void imx_flush(struct imx_ep_struct *imx_ep)
+{
+ struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
+
+ int temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
+ __raw_writel(temp | EPSTAT_FLUSH,
+ imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
+}
+
+void imx_ep_stall(struct imx_ep_struct *imx_ep)
+{
+ struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
+ int temp, i;
+
+ D_ERR(imx_usb->dev, "<%s> Forced stall on %s\n", __func__, imx_ep->ep.name);
+
+ imx_flush(imx_ep);
+
+ /* Special care for ep0 */
+ if (EP_NO(imx_ep)) {
+ temp = __raw_readl(imx_usb->base + USB_CTRL);
+ __raw_writel(temp | CTRL_CMDOVER | CTRL_CMDERROR, imx_usb->base + USB_CTRL);
+ do { } while (__raw_readl(imx_usb->base + USB_CTRL) & CTRL_CMDOVER);
+ temp = __raw_readl(imx_usb->base + USB_CTRL);
+ __raw_writel(temp & ~CTRL_CMDERROR, imx_usb->base + USB_CTRL);
+ }
+ else {
+ temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
+ __raw_writel(temp | EPSTAT_STALL,
+ imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
+
+ for (i = 0; i < 100; i ++) {
+ temp = __raw_readl(imx_usb->base + USB_EP_STAT(EP_NO(imx_ep)));
+ if (!temp & EPSTAT_STALL)
+ break;
+ udelay(20);
+ }
+ if (i == 50)
+ D_ERR(imx_usb->dev, "<%s> Non finished stall on %s\n",
+ __func__, imx_ep->ep.name);
+ }
+}
+
+static int imx_udc_get_frame(struct usb_gadget *_gadget)
+{
+ struct imx_udc_struct *imx_usb = container_of(_gadget,
+ struct imx_udc_struct, gadget);
+
+ return __raw_readl(imx_usb->base + USB_FRAME) & 0x7FF;
+}
+
+static int imx_udc_wakeup(struct usb_gadget *_gadget)
+{
+ return 0;
+}
+
+/*******************************************************************************
+ * USB request control functions
+ *******************************************************************************
+ */
+
+static void ep_add_request(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ if (unlikely(!req))
+ return;
+
+ req->in_use = 1;
+ list_add_tail(&req->queue, &imx_ep->queue);
+}
+
+static void ep_del_request(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ if (unlikely(!req))
+ return;
+
+ list_del_init(&req->queue);
+ req->in_use = 0;
+}
+
+static void done(struct imx_ep_struct *imx_ep, struct imx_request *req, int status)
+{
+ ep_del_request(imx_ep, req);
+
+ if (likely(req->req.status == -EINPROGRESS))
+ req->req.status = status;
+ else
+ status = req->req.status;
+
+ if (status && status != -ESHUTDOWN)
+ D_ERR(imx_ep->imx_usb->dev,
+ "<%s> complete %s req %p stat %d len %u/%u\n", __func__,
+ imx_ep->ep.name, &req->req, status,
+ req->req.actual, req->req.length);
+
+ req->req.complete(&imx_ep->ep, &req->req);
+}
+
+static void nuke(struct imx_ep_struct *imx_ep, int status)
+{
+ struct imx_request *req;
+
+ while (!list_empty(&imx_ep->queue)) {
+ req = list_entry(imx_ep->queue.next, struct imx_request, queue);
+ done(imx_ep, req, status);
+ }
+}
+
+/*******************************************************************************
+ * Data tansfer over USB functions
+ *******************************************************************************
+ */
+static int read_packet(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ u8 *buf;
+ int bytes_ep, bufferspace, count, i;
+
+ bytes_ep = imx_fifo_bcount(imx_ep);
+ bufferspace = req->req.length - req->req.actual;
+
+ buf = req->req.buf + req->req.actual;
+ prefetchw(buf);
+
+ if (unlikely(imx_ep_empty(imx_ep)))
+ count = 0; /* zlp */
+ else
+ count = min(bytes_ep, bufferspace);
+
+ for (i = count; i > 0; i--)
+ *buf++ = __raw_readb(imx_ep->imx_usb->base
+ + USB_EP_FDAT0(EP_NO(imx_ep)));
+ req->req.actual += count;
+
+ return count;
+}
+
+static int write_packet(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ u8 *buf;
+ int length, count, temp;
+
+ buf = req->req.buf + req->req.actual;
+ prefetch(buf);
+
+ length = min(req->req.length - req->req.actual, (u32)imx_ep->fifosize);
+
+ if (imx_fifo_bcount(imx_ep) + length > imx_ep->fifosize) {
+ D_TRX(imx_ep->imx_usb->dev, "<%s> packet overfill %s fifo\n",
+ __func__, imx_ep->ep.name);
+ return -1;
+ }
+
+ req->req.actual += length;
+ count = length;
+
+ if (!count && req->req.zero) { /* zlp */
+ temp = __raw_readl(imx_ep->imx_usb->base
+ + USB_EP_STAT(EP_NO(imx_ep)));
+ __raw_writel(temp | EPSTAT_ZLPS, imx_ep->imx_usb->base
+ + USB_EP_STAT(EP_NO(imx_ep)));
+ D_TRX(imx_ep->imx_usb->dev, "<%s> zero packet\n", __func__);
+ return 0;
+ }
+
+ while (count--) {
+ if (count == 0) { /* last byte */
+ temp = __raw_readl(imx_ep->imx_usb->base
+ + USB_EP_FCTRL(EP_NO(imx_ep)));
+ __raw_writel(temp | FCTRL_WFR, imx_ep->imx_usb->base
+ + USB_EP_FCTRL(EP_NO(imx_ep)));
+ }
+ __raw_writeb(*buf++,
+ imx_ep->imx_usb->base + USB_EP_FDAT0(EP_NO(imx_ep)));
+ }
+
+ return length;
+}
+
+static int read_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ int bytes = 0,
+ count,
+ completed = 0;
+
+ while (__raw_readl(imx_ep->imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep)))
+ & FSTAT_FR) {
+ count = read_packet(imx_ep, req);
+ bytes += count;
+
+ completed = (count != imx_ep->fifosize);
+ if (completed || req->req.actual == req->req.length) {
+ completed = 1;
+ break;
+ }
+ }
+
+ if (completed || !req->req.length) {
+ done(imx_ep, req, 0);
+ D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n",
+ __func__, imx_ep->ep.name, req,
+ completed ? "completed" : "not completed");
+ if (!EP_NO(imx_ep))
+ ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE);
+ }
+
+ D_TRX(imx_ep->imx_usb->dev, "<%s> bytes read: %d\n", __func__, bytes);
+
+ return completed;
+}
+
+static int write_fifo(struct imx_ep_struct *imx_ep, struct imx_request *req)
+{
+ int bytes = 0,
+ count,
+ completed = 0;
+
+ while (!completed) {
+ count = write_packet(imx_ep, req);
+ if (count < 0)
+ break; /* busy */
+ bytes += count;
+
+ /* last packet "must be" short (or a zlp) */
+ completed = (count != imx_ep->fifosize);
+
+ if (unlikely(completed)) {
+ done(imx_ep, req, 0);
+ D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n",
+ __func__, imx_ep->ep.name, req,
+ completed ? "completed" : "not completed");
+ if (!EP_NO(imx_ep))
+ ep0_chg_stat(__func__, imx_ep->imx_usb, EP0_IDLE);
+ }
+ }
+
+ D_TRX(imx_ep->imx_usb->dev, "<%s> bytes sent: %d\n", __func__, bytes);
+
+ return completed;
+}
+
+/*******************************************************************************
+ * Endpoint handlers
+ *******************************************************************************
+ */
+static int handle_ep(struct imx_ep_struct *imx_ep)
+{
+ struct imx_request *req;
+ int completed = 0;
+
+ do {
+ if (!list_empty(&imx_ep->queue))
+ req = list_entry(imx_ep->queue.next,
+ struct imx_request, queue);
+ else {
+ D_REQ(imx_ep->imx_usb->dev, "<%s> no request on %s\n",
+ __func__, imx_ep->ep.name);
+ return 0;
+ }
+
+ if (EP_DIR(imx_ep)) /* to host */
+ completed = write_fifo(imx_ep, req);
+ else /* to device */
+ completed = read_fifo(imx_ep, req);
+
+ dump_ep_stat(__func__, imx_ep);
+
+ } while (completed);
+
+ return 0;
+}
+
+static int handle_ep0(struct imx_ep_struct *imx_ep)
+{
+ struct imx_request *req = NULL;
+ int ret = 0;
+
+ if (!list_empty(&imx_ep->queue))
+ req = list_entry(imx_ep->queue.next, struct imx_request, queue);
+
+ if (req) {
+ switch (imx_ep->imx_usb->ep0state) {
+
+ case EP0_IN_DATA_PHASE: /* GET_DESCRIPTOR */
+ write_fifo(imx_ep, req);
+ break;
+ case EP0_OUT_DATA_PHASE: /* SET_DESCRIPTOR */
+ read_fifo(imx_ep, req);
+ break;
+ default:
+ D_EP0(imx_ep->imx_usb->dev,
+ "<%s> ep0 i/o, odd state %d\n",
+ __func__, imx_ep->imx_usb->ep0state);
+ ep_del_request(imx_ep, req);
+ ret = -EL2HLT;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static void handle_ep0_devreq(struct imx_udc_struct *imx_usb)
+{
+ struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[0];
+ union {
+ struct usb_ctrlrequest r;
+ u8 raw[8];
+ u32 word[2];
+ } u;
+ int temp, i;
+
+ nuke(imx_ep, -EPROTO);
+
+ /* read SETUP packet */
+ for (i = 0; i < 2; i++) {
+ if (imx_ep_empty(imx_ep)) {
+ D_ERR(imx_usb->dev,
+ "<%s> no setup packet received\n", __func__);
+ goto stall;
+ }
+ u.word[i] = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep)));
+ }
+
+ temp = imx_ep_empty(imx_ep);
+ while (!imx_ep_empty(imx_ep)) {
+ i = __raw_readl(imx_usb->base + USB_EP_FDAT(EP_NO(imx_ep)));
+ D_ERR(imx_usb->dev,
+ "<%s> wrong to have extra bytes for setup : 0x%08x\n",
+ __func__, i);
+ }
+ if (!temp)
+ goto stall;
+
+ le16_to_cpus(&u.r.wValue);
+ le16_to_cpus(&u.r.wIndex);
+ le16_to_cpus(&u.r.wLength);
+
+ D_REQ(imx_usb->dev, "<%s> SETUP %02x.%02x v%04x i%04x l%04x\n",
+ __func__, u.r.bRequestType, u.r.bRequest,
+ u.r.wValue, u.r.wIndex, u.r.wLength);
+
+ if (imx_usb->set_config) {
+ /* NACK the host by using CMDOVER */
+ temp = __raw_readl(imx_usb->base + USB_CTRL);
+ __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL);
+
+ D_ERR(imx_usb->dev,
+ "<%s> set config req is pending, NACK the host\n",
+ __func__);
+ return;
+ }
+
+ if (u.r.bRequestType & USB_DIR_IN)
+ ep0_chg_stat(__func__, imx_usb, EP0_IN_DATA_PHASE);
+ else
+ ep0_chg_stat(__func__, imx_usb, EP0_OUT_DATA_PHASE);
+
+ i = imx_usb->driver->setup(&imx_usb->gadget, &u.r);
+ if (i < 0) {
+ D_ERR(imx_usb->dev, "<%s> device setup error %d\n",
+ __func__, i);
+ goto stall;
+ }
+
+ return;
+stall:
+ D_ERR(imx_usb->dev, "<%s> protocol STALL\n", __func__);
+ imx_ep_stall(imx_ep);
+ ep0_chg_stat(__func__, imx_usb, EP0_STALL);
+ return;
+}
+
+/*******************************************************************************
+ * USB gadget callback functions
+ *******************************************************************************
+ */
+
+static int imx_ep_enable(struct usb_ep *usb_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct imx_ep_struct *imx_ep = container_of(usb_ep,
+ struct imx_ep_struct, ep);
+ struct imx_udc_struct *imx_usb = imx_ep->imx_usb;
+ unsigned long flags;
+
+ if (!usb_ep
+ || !desc
+ || !EP_NO(imx_ep)
+ || desc->bDescriptorType != USB_DT_ENDPOINT
+ || imx_ep->bEndpointAddress != desc->bEndpointAddress) {
+ D_ERR(imx_usb->dev,
+ "<%s> bad ep or descriptor\n", __func__);
+ return -EINVAL;
+ }
+
+ if (imx_ep->bmAttributes != desc->bmAttributes) {
+ D_ERR(imx_usb->dev,
+ "<%s