diff options
author | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-12-01 11:14:25 +1100 |
---|---|---|
committer | Stephen Rothwell <sfr@canb.auug.org.au> | 2008-12-01 11:14:25 +1100 |
commit | 2a4392f58cbdd6ba6074b041e63d59ecffd867a4 (patch) | |
tree | 79089ecb69be15e2fa684ab70ca2fea67e581135 | |
parent | fe2c729b903a03f3a1fa448a7ea7c303726c1346 (diff) | |
parent | 3e871ae395f46d0bf5ad37e67dafd035f854fa93 (diff) |
Merge branch 'quilt/usb'
94 files changed, 11354 insertions, 557 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 0fe1f4e9fcf6..4245ba4478e3 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -90,6 +90,7 @@ parameter is applicable: SWSUSP Software suspend (hibernation) is enabled. SUSPEND System suspend states are 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. @@ -2345,6 +2346,34 @@ 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: + c = FIX_CAPACITY (decrease the reported + device capacity by one sector); + 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); + 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/MAINTAINERS b/MAINTAINERS index 618c1ef4a397..c1ea1f6f276a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2978,6 +2978,7 @@ 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) 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 d746bf8284dd..f68266c4a26d 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 4c35702830ce..b2ea73150b9a 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 TPS65010 tristate "TPS6501x Power Management chips" depends on GPIOLIB diff --git a/drivers/i2c/chips/Makefile b/drivers/i2c/chips/Makefile index 23d2a31b0a64..aa7552d5b6bf 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_TPS65010) += tps65010.o obj-$(CONFIG_MENELAUS) += menelaus.o obj-$(CONFIG_SENSORS_TSL2550) += tsl2550.o diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c index 5b81ba469641..7b4bdadaa9cd 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/usb/kaweth.c b/drivers/net/usb/kaweth.c index fdbf3be24fda..92a0aee89a85 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 7914867110ed..32cc6617cc71 100644 --- a/drivers/net/usb/pegasus.c +++ b/drivers/net/usb/pegasus.c @@ -149,8 +149,8 @@ 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, @@ -207,8 +207,8 @@ 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, @@ -260,7 +260,7 @@ 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; @@ -475,7 +475,7 @@ 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/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 8e74657f106c..9f7fefd8c2eb 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> @@ -481,7 +482,6 @@ 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; @@ -525,11 +525,8 @@ 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 2bccefebff1b..9bf97fca2259 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -979,9 +979,6 @@ 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); @@ -1399,8 +1396,6 @@ 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 3d7793d93031..3b28897ee147 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 @@ -378,8 +394,10 @@ 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); @@ -902,7 +920,7 @@ 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; @@ -920,7 +938,7 @@ 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); @@ -940,7 +958,8 @@ 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); @@ -948,7 +967,7 @@ 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 { @@ -966,7 +985,7 @@ 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; @@ -1090,7 +1109,7 @@ 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; } @@ -1117,10 +1136,9 @@ 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 @@ -1155,7 +1173,7 @@ 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; @@ -1175,13 +1193,16 @@ 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, @@ -1211,6 +1232,7 @@ 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 @@ -1236,7 +1258,7 @@ 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; @@ -1252,14 +1274,15 @@ 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); @@ -1282,15 +1305,16 @@ 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); } } @@ -1318,13 +1342,13 @@ 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; @@ -1339,6 +1363,19 @@ 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 @@ -1435,13 +1472,14 @@ 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); @@ -1490,6 +1528,45 @@ 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 * @@ -1535,6 +1612,37 @@ 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 * @@ -1561,6 +1669,9 @@ 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 */ /** @@ -1593,6 +1704,7 @@ 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 @@ -1601,13 +1713,13 @@ 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) @@ -1620,7 +1732,7 @@ 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; @@ -1639,10 +1751,10 @@ 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; @@ -1654,7 +1766,7 @@ 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/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.c b/drivers/usb/core/hcd.c index e1b42626d04d..a0079876d74e 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -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..aa5da82d9071 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__ @@ -386,8 +388,8 @@ 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 +421,7 @@ 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 +463,7 @@ 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 +492,5 @@ 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..fc99ef67761d 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -1374,8 +1374,9 @@ 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 @@ -1635,6 +1636,10 @@ 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) @@ -1643,9 +1648,8 @@ 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 @@ -1659,13 +1663,11 @@ int usb_new_device(struct usb_device *udev) /* put device-specific files into sysfs */ usb_create_sysfs_dev_files(udev); - - /* Tell the world! */ - announce_device(udev); return err; fail: usb_set_device_state(udev, USB_STATE_NOTATTACHED); + usb_stop_pm(udev); return err; } @@ -1982,7 +1984,7 @@ 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 +2023,7 @@ 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); } @@ -2140,7 +2142,7 @@ 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 +2167,7 @@ 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 +2208,7 @@ 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 +2217,14 @@ 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 +2264,7 @@ 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; @@ -3517,3 +3519,46 @@ 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..aadf29f09c45 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -139,9 +139,9 @@ 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"); */ @@ -1441,6 +1441,46 @@ 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 @@ -1611,6 +1651,7 @@ free_interfaces: 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", diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 4fb65fdc9dc3..0f0ccf640114 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; @@ -812,32 +812,11 @@ 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); struct usb_host_interface *alt = intf->cur_altsetting; + int i; int retval; if (intf->sysfs_files_created || intf->unregistering) @@ -851,18 +830,22 @@ int usb_create_sysfs_intf_files(struct usb_interface *intf) 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); + for (i = 0; i < alt->desc.bNumEndpoints; ++i) + usb_create_ep_files(&intf->dev, &alt->endpoint[i], udev); intf->sysfs_files_created = 1; return 0; } void usb_remove_sysfs_intf_files(struct usb_interface *intf) { - struct device *dev = &intf->dev; + struct usb_host_interface *alt = intf->cur_altsetting; + int i; if (!intf->sysfs_files_created) return; - usb_remove_intf_ep_files(intf); - device_remove_file(dev, &dev_attr_interface); + + for (i = 0; i < alt->desc.bNumEndpoints; ++i) + usb_remove_ep_files(&alt->endpoint[i]); + device_remove_file(&intf->dev, &dev_attr_interface); intf->sysfs_files_created = 0; } diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c index 399e15fc5052..18ffa17f4b32 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 = { @@ -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); @@ -962,9 +954,6 @@ 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); - /* * for external read access to <nousb> */ @@ -1052,6 +1041,11 @@ static void __exit usb_exit(void) ksuspend_usb_cleanup(); } +/* To disable USB, kernel command line is 'nousb' not 'usbcore.nousb' */ +#undef MODULE_PARAM_PREFIX +#define MODULE_PARAM_PREFIX +module_param(nousb, bool, 0444); + subsys_initcall(usb_init); module_exit(usb_exit); MODULE_LICENSE("GPL"); diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h index 9a1a45ac3add..9fb195665fa8 100644 --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -1,3 +1,5 @@ +#include <linux/pm.h> + /* Functions local to drivers/usb/core/ */ extern int usb_create_sysfs_dev_files(struct usb_device *dev); @@ -42,14 +44,16 @@ 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 +67,12 @@ 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..b61d101184d5 100644 --- a/drivers/usb/gadget/Kconfig +++ b/drivers/usb/gadget/Kconfig @@ -305,6 +305,27 @@ config USB_GADGET_MUSB_HDRC This OTG-capable silicon IP is used in dual designs including the TI DaVinci, OMAP 243x, OMAP 343x, and TUSB 6010. +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" select USB_GADGET_DUALSPEED @@ -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 *)®); +} + +/** + * 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 c4e62a6297d7..1aee5b063330 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 @@ -2022,23 +2042,28 @@ 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; } @@ -2117,6 +2142,75 @@ 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; @@ -2864,6 +2958,26 @@ 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, @@ -2949,6 +3063,7 @@ 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, @@ -3514,6 +3629,7 @@ 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; @@ -3557,8 +3673,19 @@ 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; @@ -3861,9 +3988,12 @@ 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 */ @@ -3888,6 +4018,8 @@ 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; @@ -4047,9 +4179,9 @@ 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); 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/imx_udc.c b/drivers/usb/gadget/imx_udc.c new file mode 100644 index 000000000000..718cbe7bdf8f --- /dev/null +++ b/drivers/usb/gadget/imx_udc.c @@ -0,0 +1,1494 @@ +/* + * 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_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 | EPINTR_FIFO_EMPTY + | EPINTR_FIFO_FULL), 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_force_stall(struct imx_ep_struct *imx_ep) +{ + struct imx_udc_struct *imx_usb = imx_ep->imx_usb; + int temp; + + imx_flush(imx_ep); + 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))); +} + +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_REQ(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, + is_short, + 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; + + is_short = (count != imx_ep->fifosize); + if (is_short || req->req.actual == req->req.length) { + completed = 1; + break; + } + } + + if (completed || !req->req.length) { + done(imx_ep, req, 0); + 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, + is_short = 0; + + while (!is_short) { + count = write_packet(imx_ep, req); + if (count < 0) + break; /* busy */ + bytes += count; + + /* last packet "must be" short (or a zlp) */ + is_short = (count != imx_ep->fifosize); + + if (unlikely(is_short)) { + done(imx_ep, req, 0); + 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 is_short; +} + +/******************************************************************************* + * 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); + + D_REQ(imx_ep->imx_usb->dev, "<%s> %s req<%p> %s\n", + __func__, imx_ep->ep.name, req, + completed ? "completed" : "not completed"); + + 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_EP0(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_EP0(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_EP0(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_EP0(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_EP0(imx_usb->dev, "<%s> protocol STALL, ep0 err %d\n", + __func__, i); + goto stall; + } + + return; +stall: + imx_force_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_EPX(imx_usb->dev, + "<%s> bad ep or descriptor\n", __func__); + return -EINVAL; + } + + if (imx_ep->bmAttributes != desc->bmAttributes) { + D_EPX(imx_usb->dev, + "<%s> %s type mismatch\n", __func__, usb_ep->name); + return -EINVAL; + } + + if (imx_ep->fifosize < le16_to_cpu(desc->wMaxPacketSize)) { + D_EPX(imx_usb->dev, + "<%s> bad %s maxpacket\n", __func__, usb_ep->name); + return -ERANGE; + } + + if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { + D_EPX(imx_usb->dev, "<%s> bogus device state\n", __func__); + return -ESHUTDOWN; + } + + spin_lock_irqsave(&imx_ep->lock, flags); + + imx_ep->stopped = 0; + imx_flush(imx_ep); + imx_ep_irq_enable(imx_ep); + + spin_unlock_irqrestore(&imx_ep->lock, flags); + + D_EPX(imx_usb->dev, "<%s> ENABLED %s\n", __func__, usb_ep->name); + return 0; +} + +static int imx_ep_disable(struct usb_ep *usb_ep) +{ + struct imx_ep_struct *imx_ep = container_of(usb_ep, + struct imx_ep_struct, ep); + unsigned long flags; + + if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { + D_EPX(imx_ep->imx_usb->dev, "<%s> %s can not be disabled\n", + __func__, usb_ep ? imx_ep->ep.name : NULL); + return -EINVAL; + } + + spin_lock_irqsave(&imx_ep->lock, flags); + + imx_ep->stopped = 1; + nuke(imx_ep, -ESHUTDOWN); + imx_flush(imx_ep); + imx_ep_irq_disable(imx_ep); + + spin_unlock_irqrestore(&imx_ep->lock, flags); + + D_EPX(imx_ep->imx_usb->dev, + "<%s> DISABLED %s\n", __func__, usb_ep->name); + return 0; +} + +static struct usb_request *imx_ep_alloc_request + (struct usb_ep *usb_ep, gfp_t gfp_flags) +{ + struct imx_request *req; + + req = kzalloc(sizeof *req, gfp_flags); + if (!req || !usb_ep) + return 0; + + INIT_LIST_HEAD(&req->queue); + req->in_use = 0; + + return &req->req; +} + +static void imx_ep_free_request + (struct usb_ep *usb_ep, struct usb_request *usb_req) +{ + struct imx_request *req; + + req = container_of(usb_req, struct imx_request, req); + WARN_ON(!list_empty(&req->queue)); + kfree(req); +} + +static int imx_ep_queue + (struct usb_ep *usb_ep, struct usb_request *usb_req, gfp_t gfp_flags) +{ + struct imx_ep_struct *imx_ep = container_of + (usb_ep, struct imx_ep_struct, ep); + struct imx_request *req = container_of + (usb_req, struct imx_request, req); + struct imx_udc_struct *imx_usb = imx_ep->imx_usb; + unsigned long flags; + int ret = 0; + + if (imx_usb->set_config && !EP_NO(imx_ep)) { + /* + Special care on IMX udc. + Ignore enqueue when after set configuration from the + host. This assume all gadget drivers reply set + configuration with the next ep0 req enqueue. + */ + imx_usb->set_config = 0; + D_EPX(imx_usb->dev, + "<%s> gadget reply set config\n", __func__); + return 0; + } + + if (unlikely(!usb_req || !req || !usb_req->complete || !usb_req->buf)) { + D_EPX(imx_usb->dev, "<%s> bad params\n", __func__); + return -EINVAL; + } + + if (unlikely(!usb_ep || !imx_ep)) { + D_EPX(imx_usb->dev, "<%s> bad ep\n", __func__); + return -EINVAL; + } + + if (!imx_usb->driver || imx_usb->gadget.speed == USB_SPEED_UNKNOWN) { + D_EPX(imx_usb->dev, "<%s> bogus device state\n", __func__); + return -ESHUTDOWN; + } + + spin_lock_irqsave(&imx_ep->lock, flags); + + /* Debug */ + dump_usb_stat(__func__, imx_usb); + dump_req(__func__, imx_ep, usb_req); + + if (imx_ep->stopped) { + usb_req->status = -ESHUTDOWN; + ret = -ESHUTDOWN; + goto out; + } + + if (req->in_use) { + D_REQ(imx_usb->dev, + "<%s> refusing to queue req %p (already queued)\n", + __func__, req); + goto out; + } + + usb_req->status = -EINPROGRESS; + usb_req->actual = 0; + + ep_add_request(imx_ep, req); + + if (!EP_NO(imx_ep)) /* ep0 */ + ret = handle_ep0(imx_ep); + else + ret = handle_ep(imx_ep); +out: + spin_unlock_irqrestore(&imx_ep->lock, flags); + return ret; +} + +static int imx_ep_dequeue(struct usb_ep *usb_ep, struct usb_request *usb_req) +{ + + struct imx_ep_struct *imx_ep = container_of + (usb_ep, struct imx_ep_struct, ep); + struct imx_request *req; + unsigned long flags; + + if (unlikely(!usb_ep || !EP_NO(imx_ep))) { + D_EPX(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); + return -EINVAL; + } + + spin_lock_irqsave(&imx_ep->lock, flags); + + /* make sure it's actually queued on this endpoint */ + list_for_each_entry(req, &imx_ep->queue, queue) { + if (&req->req == usb_req) + break; + } + if (&req->req != usb_req) { + spin_unlock_irqrestore(&imx_ep->lock, flags); + return -EINVAL; + } + + done(imx_ep, req, -ECONNRESET); + + spin_unlock_irqrestore(&imx_ep->lock, flags); + return 0; +} + +static int imx_ep_set_halt(struct usb_ep *usb_ep, int value) +{ + struct imx_ep_struct *imx_ep = container_of + (usb_ep, struct imx_ep_struct, ep); + unsigned long flags; + + if (unlikely(!usb_ep || !EP_NO(imx_ep))) { + D_EPX(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); + return -EINVAL; + } + + spin_lock_irqsave(&imx_ep->lock, flags); + + if ((imx_ep->bEndpointAddress & USB_DIR_IN) + && !list_empty(&imx_ep->queue)) { + spin_unlock_irqrestore(&imx_ep->lock, flags); + return -EAGAIN; + } + + imx_force_stall(imx_ep); + + spin_unlock_irqrestore(&imx_ep->lock, flags); + + D_EPX(imx_ep->imx_usb->dev, "<%s> %s halt\n", __func__, usb_ep->name); + return 0; +} + +static int imx_ep_fifo_status(struct usb_ep *usb_ep) +{ + struct imx_ep_struct *imx_ep = container_of + (usb_ep, struct imx_ep_struct, ep); + + if (!usb_ep) { + D_EPX(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); + return -ENODEV; + } + + if (imx_ep->imx_usb->gadget.speed == USB_SPEED_UNKNOWN) + return 0; + else + return imx_fifo_bcount(imx_ep); +} + +static void imx_ep_fifo_flush(struct usb_ep *usb_ep) +{ + struct imx_ep_struct *imx_ep = container_of + (usb_ep, struct imx_ep_struct, ep); + unsigned long flags; + + spin_lock_irqsave(&imx_ep->lock, flags); + + if (!usb_ep || !EP_NO(imx_ep) || !list_empty(&imx_ep->queue)) { + D_EPX(imx_ep->imx_usb->dev, "<%s> bad ep\n", __func__); + spin_unlock_irqrestore(&imx_ep->lock, flags); + return; + } + + /* toggle and halt bits stay unchanged */ + imx_flush(imx_ep); + + spin_unlock_irqrestore(&imx_ep->lock, flags); +} + +static struct usb_ep_ops imx_ep_ops = { + .enable = imx_ep_enable, + .disable = imx_ep_disable, + + .alloc_request = imx_ep_alloc_request, + .free_request = imx_ep_free_request, + + .queue = imx_ep_queue, + .dequeue = imx_ep_dequeue, + + .set_halt = imx_ep_set_halt, + .fifo_status = imx_ep_fifo_status, + .fifo_flush = imx_ep_fifo_flush, +}; + +/******************************************************************************* + * USB endpoint control functions + ******************************************************************************* + */ + +void ep0_chg_stat(const char *label, + struct imx_udc_struct *imx_usb, enum ep0_state stat) +{ + D_STT(imx_usb->dev, "<%s> from %15s to %15s\n", + label, state_name[imx_usb->ep0state], state_name[stat]); + + if (imx_usb->ep0state == stat) + return; + + imx_usb->ep0state = stat; +} + +static void usb_init_data(struct imx_udc_struct *imx_usb) +{ + struct imx_ep_struct *imx_ep; + u8 i; + + /* device/ep0 records init */ + INIT_LIST_HEAD(&imx_usb->gadget.ep_list); + INIT_LIST_HEAD(&imx_usb->gadget.ep0->ep_list); + ep0_chg_stat(__func__, imx_usb, EP0_IDLE); + + /* basic endpoint records init */ + for (i = 0; i < IMX_USB_NB_EP; i++) { + imx_ep = &imx_usb->imx_ep[i]; + + if (i) { + list_add_tail(&imx_ep->ep.ep_list, + &imx_usb->gadget.ep_list); + imx_ep->stopped = 1; + } else + imx_ep->stopped = 0; + + INIT_LIST_HEAD(&imx_ep->queue); + spin_lock_init(&imx_ep->lock); + } +} + +static void udc_stop_activity(struct imx_udc_struct *imx_usb, + struct usb_gadget_driver *driver) +{ + struct imx_ep_struct *imx_ep; + int i; + + + if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN) + driver = 0; + /* prevent new request submissions, kill any outstanding requests */ + for (i = 1; i < IMX_USB_NB_EP; i++) { + imx_ep = &imx_usb->imx_ep[i]; + imx_flush(imx_ep); + imx_ep->stopped = 1; + nuke(imx_ep, -ESHUTDOWN); + } + imx_usb->gadget.speed = USB_SPEED_UNKNOWN; + if (driver) { + imx_usb->cfg = 0; + imx_usb->intf = 0; + imx_usb->alt = 0; + driver->disconnect(&imx_usb->gadget); + } +} + +/******************************************************************************* + * Interrupt handlers + ******************************************************************************* + */ + +static irqreturn_t imx_udc_irq(int irq, void *dev) +{ + struct imx_udc_struct *imx_usb = dev; + struct usb_ctrlrequest u; + int intr, temp, cfg, intf, alt; + + + intr = __raw_readl(imx_usb->base + USB_INTR); + + if (intr & (INTR_WAKEUP | INTR_SUSPEND | INTR_RESUME | INTR_RESET_START + | INTR_RESET_STOP | INTR_CFG_CHG)) { + dump_intr(__func__, intr, imx_usb->dev); + dump_usb_stat(__func__, imx_usb); + } + + if (!imx_usb->driver) { + /*imx_udc_disable(imx_usb);*/ + goto end_irq; + } + + if (intr & INTR_WAKEUP) { + if (imx_usb->gadget.speed == USB_SPEED_UNKNOWN + && imx_usb->driver && imx_usb->driver->resume) + imx_usb->driver->resume(&imx_usb->gadget); + __raw_writel(intr, imx_usb->base + USB_INTR); + imx_usb->set_config = 0; + imx_usb->gadget.speed = USB_SPEED_FULL; + } + + if (intr & INTR_SUSPEND) { + if (imx_usb->gadget.speed != USB_SPEED_UNKNOWN + && imx_usb->driver && imx_usb->driver->suspend) + imx_usb->driver->suspend(&imx_usb->gadget); + imx_usb->gadget.speed = USB_SPEED_UNKNOWN; + } + + if (intr & INTR_RESET_START) { + udc_stop_activity(imx_usb, imx_usb->driver); + __raw_writel(intr, imx_usb->base + USB_INTR); + imx_usb->set_config = 0; + imx_usb->gadget.speed = USB_SPEED_FULL; + } + + if (intr & INTR_RESET_STOP) + imx_usb->gadget.speed = USB_SPEED_FULL; + + if (intr & INTR_CFG_CHG) { + temp = __raw_readl(imx_usb->base + USB_STAT); + cfg = (temp & STAT_CFG) >> 5; + intf = (temp & STAT_INTF) >> 3; + alt = temp & STAT_ALTSET; + + D_IRQ(imx_usb->dev, + "<%s> orig config C=%d, I=%d, A=%d / " + "req config C=%d, I=%d, A=%d\n", + __func__, imx_usb->cfg, imx_usb->intf, imx_usb->alt, + cfg, intf, alt); + + if (cfg != 1 && cfg != 2) + goto end_irq; /* can not happen */ + + imx_usb->set_config = 0; + + /* Config setup */ + if (imx_usb->cfg != cfg) { + u.bRequest = USB_REQ_SET_CONFIGURATION; + u.bRequestType = USB_DIR_OUT | + USB_TYPE_STANDARD | + USB_RECIP_DEVICE; + u.wValue = cfg; + u.wIndex = 0; + u.wLength = 0; + imx_usb->cfg = cfg; + imx_usb->set_config = 1; + imx_usb->driver->setup(&imx_usb->gadget, &u); + } + + if (imx_usb->intf != intf || imx_usb->alt != alt) { + + u.bRequest = USB_REQ_SET_INTERFACE; + u.bRequestType = USB_DIR_OUT | + USB_TYPE_STANDARD | + USB_RECIP_INTERFACE; + u.wValue = alt; + u.wIndex = intf; + u.wLength = 0; + imx_usb->intf = intf; + imx_usb->alt = alt; + imx_usb->set_config = 1; + imx_usb->driver->setup(&imx_usb->gadget, &u); + } + } + + if (intr & INTR_SOF) { + /* copy from motorola bsp. + We must enable SOF intr and signal CMDOVER. + Datasheet don't specifiy this action, but it + is done in motorola bsp, so just copy it + */ + if (imx_usb->ep0state == EP0_IDLE) { + temp = __raw_readl(imx_usb->base + USB_CTRL); + __raw_writel(temp | CTRL_CMDOVER, imx_usb->base + USB_CTRL); + } + } + +end_irq: + __raw_writel(intr, imx_usb->base + USB_INTR); + return IRQ_HANDLED; +} + +static irqreturn_t imx_udc_ctrl_irq(int irq, void *dev) +{ + struct imx_udc_struct *imx_usb = dev; + int intr = __raw_readl(imx_usb->base + USB_EP_INTR(0)); + + dump_ep_intr(__func__, 0, intr, imx_usb->dev); + + if (!imx_usb->driver) { + __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); + return IRQ_HANDLED; + } + + /* DEVREQ IRQ has highest priority */ + if (intr & EPINTR_DEVREQ) + handle_ep0_devreq(imx_usb); + /* Seem i.MX is missing EOF interrupt sometimes. + * Therefore we monitor both EOF and FIFO_EMPTY interrups + * when transmiting, and both EOF and FIFO_FULL when + * receiving data. + */ + else if (intr & (EPINTR_EOF | EPINTR_FIFO_EMPTY | EPINTR_FIFO_FULL)) + handle_ep0(&imx_usb->imx_ep[0]); + + __raw_writel(intr, imx_usb->base + USB_EP_INTR(0)); + + return IRQ_HANDLED; +} + +static irqreturn_t imx_udc_bulk_irq(int irq, void *dev) +{ + struct imx_udc_struct *imx_usb = dev; + struct imx_ep_struct *imx_ep = &imx_usb->imx_ep[irq - USBD_INT0]; + int intr = __raw_readl(imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); + + dump_ep_intr(__func__, irq - USBD_INT0, intr, imx_usb->dev); + + if (!imx_usb->driver) { + __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); + return IRQ_HANDLED; + } + + handle_ep(imx_ep); + + __raw_writel(intr, imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); + + return IRQ_HANDLED; +} + +irq_handler_t intr_handler(int i) +{ + switch (i) { + case 0: + return imx_udc_ctrl_irq; + case 1: + case 2: + case 3: + case 4: + case 5: + return imx_udc_bulk_irq; + default: + return imx_udc_irq; + } +} + +/******************************************************************************* + * Static defined IMX UDC structure + ******************************************************************************* + */ + +static const struct usb_gadget_ops imx_udc_ops = { + .get_frame = imx_udc_get_frame, + .wakeup = imx_udc_wakeup, +}; + +static struct imx_udc_struct controller = { + .gadget = { + .ops = &imx_udc_ops, + .ep0 = &controller.imx_ep[0].ep, + .name = driver_name, + .dev = { + .bus_id = "gadget", + }, + }, + + .imx_ep[0] = { + .ep = { + .name = ep0name, + .ops = &imx_ep_ops, + .maxpacket = 32, + }, + .imx_usb = &controller, + .fifosize = 32, + .bEndpointAddress = 0, + .bmAttributes = USB_ENDPOINT_XFER_CONTROL, + }, + + .imx_ep[1] = { + .ep = { + .name = "ep1in-bulk", + .ops = &imx_ep_ops, + .maxpacket = 64, + }, + .imx_usb = &controller, + .fifosize = 64, + .bEndpointAddress = USB_DIR_IN | 1, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + }, + .imx_ep[2] = { + .ep = { + .name = "ep2out-bulk", + .ops = &imx_ep_ops, + .maxpacket = 64, + }, + .imx_usb = &controller, + .fifosize = 64, + .bEndpointAddress = USB_DIR_OUT | 2, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + }, + .imx_ep[3] = { + .ep = { + .name = "ep3out-bulk", + .ops = &imx_ep_ops, + .maxpacket = 32, + }, + .imx_usb = &controller, + .fifosize = 32, + .bEndpointAddress = USB_DIR_OUT | 3, + .bmAttributes = USB_ENDPOINT_XFER_BULK, + }, + .imx_ep[4] = { + .ep = { + .name = "ep4in-int", + .ops = &imx_ep_ops, + .maxpacket = 16, + }, + .imx_usb = &controller, + .fifosize = 16, + .bEndpointAddress = USB_DIR_IN | 4, + .bmAttributes = USB_ENDPOINT_XFER_INT, + }, + .imx_ep[5] = { + .ep = { + .name = "ep5out-int", + .ops = &imx_ep_ops, + .maxpacket = 16, + }, + .imx_usb = &controller, + .fifosize = 16, + .bEndpointAddress = USB_DIR_OUT | 5, + .bmAttributes = USB_ENDPOINT_XFER_INT, + }, +}; + +/******************************************************************************* + * USB gadged driver functions + ******************************************************************************* + */ +int usb_gadget_register_driver(struct usb_gadget_driver *driver) +{ + struct imx_udc_struct *imx_usb = &controller; + int retval; + + if (!driver + || driver->speed < USB_SPEED_FULL + || !driver->bind + || !driver->disconnect + || !driver->setup) + return -EINVAL; + if (!imx_usb) + return -ENODEV; + if (imx_usb->driver) + return -EBUSY; + + /* first hook up the driver ... */ + imx_usb->driver = driver; + imx_usb->gadget.dev.driver = &driver->driver; + + retval = device_add(&imx_usb->gadget.dev); + if (retval) + goto fail; + retval = driver->bind(&imx_usb->gadget); + if (retval) { + D_INI(imx_usb->dev, "<%s> bind to driver %s --> error %d\n", + __func__, driver->driver.name, retval); + device_del(&imx_usb->gadget.dev); + + goto fail; + } + + D_INI(imx_usb->dev, "<%s> registered gadget driver '%s'\n", + __func__, driver->driver.name); + imx_udc_enable(imx_usb); + imx_usb->cfg = 0; + imx_usb->intf = 0; + imx_usb->alt = 0; + + return 0; +fail: + imx_usb->driver = NULL; + imx_usb->gadget.dev.driver = NULL; + return retval; +} +EXPORT_SYMBOL(usb_gadget_register_driver); + +int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) +{ + struct imx_udc_struct *imx_usb = &controller; + + if (!imx_usb) + return -ENODEV; + if (!driver || driver != imx_usb->driver || !driver->unbind) + return -EINVAL; + + udc_stop_activity(imx_usb, driver); + imx_udc_disable(imx_usb); + + driver->unbind(&imx_usb->gadget); + imx_usb->gadget.dev.driver = NULL; + imx_usb->driver = NULL; + + device_del(&imx_usb->gadget.dev); + + D_INI(imx_usb->dev, "<%s> unregistered gadget driver '%s'\n", + __func__, driver->driver.name); + + return 0; +} +EXPORT_SYMBOL(usb_gadget_unregister_driver); + +/******************************************************************************* + * Module functions + ******************************************************************************* + */ + +static int __init imx_udc_probe(struct platform_device *pdev) +{ + struct imx_udc_struct *imx_usb = &controller; + struct resource *res; + struct imxusb_platform_data *pdata; + struct clk *clk; + void __iomem *base; + int ret = 0; + int i, res_size; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "can't get device resources\n"); + return -ENODEV; + } + + pdata = pdev->dev.platform_data; + if (!pdata) { + dev_err(&pdev->dev, "driver needs platform data\n"); + return -ENODEV; + } + + res_size = res->end - res->start + 1; + if (!request_mem_region(res->start, res_size, res->name)) { + dev_err(&pdev->dev, "can't allocate %d bytes at %d address\n", + res_size, res->start); + return -ENOMEM; + } + + if (pdata->init) { + ret = pdata->init(&pdev->dev); + if (ret) + goto fail0; + } + + base = ioremap(res->start, res_size); + if (!base) { + dev_err(&pdev->dev, "ioremap failed\n"); + ret = -EIO; + goto fail1; + } + + clk = clk_get(NULL, "usbd_clk"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + dev_err(&pdev->dev, "can't get USB clock\n"); + goto fail2; + } + clk_enable(clk); + + if (clk_get_rate(clk) != 48000000) { + D_INI(&pdev->dev, + "Bad USB clock (%d Hz), changing to 48000000 Hz\n", + (int)clk_get_rate(clk)); + if (clk_set_rate(clk, 48000000)) { + dev_err(&pdev->dev, + "Unable to set correct USB clock (48MHz)\n"); + ret = -EIO; + goto fail3; + } + } + + for (i = 0; i < IMX_USB_NB_EP + 1; i++) { + imx_usb->usbd_int[i] = platform_get_irq(pdev, i); + if (imx_usb->usbd_int[i] < 0) { + dev_err(&pdev->dev, "can't get irq number\n"); + ret = -ENODEV; + goto fail3; + } + } + + for (i = 0; i < IMX_USB_NB_EP + 1; i++) { + ret = request_irq(imx_usb->usbd_int[i], intr_handler(i), + IRQF_DISABLED, driver_name, imx_usb); + if (ret) { + dev_err(&pdev->dev, "can't get irq %i, err %d\n", + imx_usb->usbd_int[i], ret); + for (--i; i >= 0; i--) + free_irq(imx_usb->usbd_int[i], imx_usb); + goto fail3; + } + } + + imx_usb->res = res; + imx_usb->base = base; + imx_usb->clk = clk; + imx_usb->dev = &pdev->dev; + + device_initialize(&imx_usb->gadget.dev); + + imx_usb->gadget.dev.parent = &pdev->dev; + imx_usb->gadget.dev.dma_mask = pdev->dev.dma_mask; + + platform_set_drvdata(pdev, imx_usb); + + dump_usb_stat(__func__, imx_usb); + + usb_init_data(imx_usb); + imx_udc_init(imx_usb); + + dump_usb_stat(__func__, imx_usb); + + return 0; + +fail3: + clk_put(clk); + clk_disable(clk); +fail2: + iounmap(base); +fail1: + if (pdata->exit) + pdata->exit(&pdev->dev); +fail0: + release_mem_region(res->start, res_size); + return ret; +} + +static int __exit imx_udc_remove(struct platform_device *pdev) +{ + struct imx_udc_struct *imx_usb = platform_get_drvdata(pdev); + struct imxusb_platform_data *pdata = pdev->dev.platform_data; + int i; + + imx_udc_disable(imx_usb); + + for (i = 0; i < IMX_USB_NB_EP + 1; i++) + free_irq(imx_usb->usbd_int[i], imx_usb); + + clk_put(imx_usb->clk); + clk_disable(imx_usb->clk); + iounmap(imx_usb->base); + + release_mem_region(imx_usb->res->start, + imx_usb->res->end - imx_usb->res->start + 1); + + if (pdata->exit) + pdata->exit(&pdev->dev); + + platform_set_drvdata(pdev, NULL); + + return 0; +} + +/*----------------------------------------------------------------------------*/ + +#ifdef CONFIG_PM +#define imx_udc_suspend NULL +#define imx_udc_resume NULL +#else +#define imx_udc_suspend NULL +#define imx_udc_resume NULL +#endif + +/*----------------------------------------------------------------------------*/ + +static struct platform_driver udc_driver = { + .driver = { + .name = driver_name, + .owner = THIS_MODULE, + }, + .remove = __exit_p(imx_udc_remove), + .suspend = imx_udc_suspend, + .resume = imx_udc_resume, +}; + +static int __init udc_init(void) +{ + return platform_driver_probe(&udc_driver, imx_udc_probe); +} +module_init(udc_init); + +static void __exit udc_exit(void) +{ + platform_driver_unregister(&udc_driver); +} +module_exit(udc_exit); + +MODULE_DESCRIPTION("IMX USB Device Controller driver"); +MODULE_AUTHOR("Darius Augulis <augulis.darius@gmail.com>"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:imx_udc"); diff --git a/drivers/usb/gadget/imx_udc.h b/drivers/usb/gadget/imx_udc.h new file mode 100644 index 000000000000..192161a756bd --- /dev/null +++ b/drivers/usb/gadget/imx_udc.h @@ -0,0 +1,327 @@ +/* + * Copyright (C) 2005 Mike Lee(eemike@gmail.com) + * + * This udc driver is now under testing and code is based on pxa2xx_udc.h + * Please use it with your own risk! + * + * 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 __LINUX_USB_GADGET_IMX_H +#define __LINUX_USB_GADGET_IMX_H + +#include <linux/types.h> + +/* Helper macros */ +#define EP_NO(ep) ((ep->bEndpointAddress) & ~USB_DIR_IN) /* IN:1, OUT:0 */ +#define EP_DIR(ep) ((ep->bEndpointAddress) & USB_DIR_IN ? 1 : 0) +#define irq_to_ep(irq) (((irq) >= USBD_INT0) || ((irq) <= USBD_INT6) ? ((irq) - USBD_INT0) : (USBD_INT6)) /*should not happen*/ +#define ep_to_irq(ep) (EP_NO((ep)) + USBD_INT0) +#define IMX_USB_NB_EP 6 + +/* Driver structures */ +struct imx_request { + struct usb_request req; + struct list_head queue; + unsigned int in_use; +}; + +enum ep0_state { + EP0_IDLE, + EP0_IN_DATA_PHASE, + EP0_OUT_DATA_PHASE, + EP0_END_XFER, + EP0_STALL, +}; + +struct imx_ep_struct { + struct usb_ep ep; + struct imx_udc_struct *imx_usb; + struct list_head queue; + spinlock_t lock; + unsigned char stopped; + unsigned char fifosize; + unsigned char bEndpointAddress; + unsigned char bmAttributes; +}; + +struct imx_udc_struct { + struct usb_gadget gadget; + struct usb_gadget_driver *driver; + struct device *dev; + struct imx_ep_struct imx_ep[IMX_USB_NB_EP]; + struct clk *clk; + enum ep0_state ep0state; + struct resource *res; + void __iomem *base; + spinlock_t lock; + unsigned char set_config; + int cfg, + intf, + alt, + usbd_int[7]; +}; + +/* USB registers */ +#define USB_FRAME (0x00) /* USB frame */ +#define USB_SPEC (0x04) /* USB Spec */ +#define USB_STAT (0x08) /* USB Status */ +#define USB_CTRL (0x0C) /* USB Control */ +#define USB_DADR (0x10) /* USB Desc RAM addr */ +#define USB_DDAT (0x14) /* USB Desc RAM/EP buffer data */ +#define USB_INTR (0x18) /* USB interrupt */ +#define USB_MASK (0x1C) /* USB Mask */ +#define USB_ENAB (0x24) /* USB Enable */ +#define USB_EP_STAT(x) (0x30 + (x*0x30)) /* USB status/control */ +#define USB_EP_INTR(x) (0x34 + (x*0x30)) /* USB interrupt */ +#define USB_EP_MASK(x) (0x38 + (x*0x30)) /* USB mask */ +#define USB_EP_FDAT(x) (0x3C + (x*0x30)) /* USB FIFO data */ +#define USB_EP_FDAT0(x) (0x3C + (x*0x30)) /* USB FIFO data */ +#define USB_EP_FDAT1(x) (0x3D + (x*0x30)) /* USB FIFO data */ +#define USB_EP_FDAT2(x) (0x3E + (x*0x30)) /* USB FIFO data */ +#define USB_EP_FDAT3(x) (0x3F + (x*0x30)) /* USB FIFO data */ +#define USB_EP_FSTAT(x) (0x40 + (x*0x30)) /* USB FIFO status */ +#define USB_EP_FCTRL(x) (0x44 + (x*0x30)) /* USB FIFO control */ +#define USB_EP_LRFP(x) (0x48 + (x*0x30)) /* USB last read frame pointer */ +#define USB_EP_LWFP(x) (0x4C + (x*0x30)) /* USB last write frame pointer */ +#define USB_EP_FALRM(x) (0x50 + (x*0x30)) /* USB FIFO alarm */ +#define USB_EP_FRDP(x) (0x54 + (x*0x30)) /* USB FIFO read pointer */ +#define USB_EP_FWRP(x) (0x58 + (x*0x30)) /* USB FIFO write pointer */ +/* USB Control Register Bit Fields.*/ +#define CTRL_CMDOVER (1<<6) /* UDC status */ +#define CTRL_CMDERROR (1<<5) /* UDC status */ +#define CTRL_FE_ENA (1<<3) /* Enable Font End logic */ +#define CTRL_UDC_RST (1<<2) /* UDC reset */ +#define CTRL_AFE_ENA (1<<1) /* Analog Font end enable */ +#define CTRL_RESUME (1<<0) /* UDC resume */ +/* USB Status Register Bit Fields.*/ +#define STAT_RST (1<<8) +#define STAT_SUSP (1<<7) +#define STAT_CFG (3<<5) +#define STAT_INTF (3<<3) +#define STAT_ALTSET (7<<0) +/* USB Interrupt Status/Mask Registers Bit fields */ +#define INTR_WAKEUP (1<<31) /* Wake up Interrupt */ +#define INTR_MSOF (1<<7) /* Missed Start of Frame */ +#define INTR_SOF (1<<6) /* Start of Frame */ +#define INTR_RESET_STOP (1<<5) /* Reset Signaling stop */ +#define INTR_RESET_START (1<<4) /* Reset Signaling start */ +#define INTR_RESUME (1<<3) /* Suspend to resume */ +#define INTR_SUSPEND (1<<2) /* Active to suspend */ +#define INTR_FRAME_MATCH (1<<1) /* Frame matched */ +#define INTR_CFG_CHG (1<<0) /* Configuration change occurred */ +/* USB Enable Register Bit Fields.*/ +#define ENAB_RST (1<<31) /* Reset USB modules */ +#define ENAB_ENAB (1<<30) /* Enable USB modules*/ +#define ENAB_SUSPEND (1<<29) /* Suspend USB modules */ +#define ENAB_ENDIAN (1<<28) /* Endian of USB modules */ +#define ENAB_PWRMD (1<<0) /* Power mode of USB modules */ +/* USB Descriptor Ram Address Register bit fields */ +#define DADR_CFG (1<<31) /* Configuration */ +#define DADR_BSY (1<<30) /* Busy status */ +#define DADR_DADR (0x1FF) /* Descriptor Ram Address */ +/* USB Descriptor RAM/Endpoint Buffer Data Register bit fields */ +#define DDAT_DDAT (0xFF) /* Descriptor Endpoint Buffer */ +/* USB Endpoint Status Register bit fields */ +#define EPSTAT_BCOUNT (0x7F<<16) /* Endpoint FIFO byte count */ +#define EPSTAT_SIP (1<<8) /* Endpoint setup in progress */ +#define EPSTAT_DIR (1<<7) /* Endpoint transfer direction */ +#define EPSTAT_MAX (3<<5) /* Endpoint Max packet size */ +#define EPSTAT_TYP (3<<3) /* Endpoint type */ +#define EPSTAT_ZLPS (1<<2) /* Send zero length packet */ +#define EPSTAT_FLUSH (1<<1) /* Endpoint FIFO Flush */ +#define EPSTAT_STALL (1<<0) /* Force stall */ +/* USB Endpoint FIFO Status Register bit fields */ +#define FSTAT_FRAME_STAT (0xF<<24) /* Frame status bit [0-3] */ +#define FSTAT_ERR (1<<22) /* FIFO error */ +#define FSTAT_UF (1<<21) /* FIFO underflow */ +#define FSTAT_OF (1<<20) /* FIFO overflow */ +#define FSTAT_FR (1<<19) /* FIFO frame ready */ +#define FSTAT_FULL (1<<18) /* FIFO full */ +#define FSTAT_ALRM (1<<17) /* FIFO alarm */ +#define FSTAT_EMPTY (1<<16) /* FIFO empty */ +/* USB Endpoint FIFO Control Register bit fields */ +#define FCTRL_WFR (1<<29) /* Write frame end */ +/* USB Endpoint Interrupt Status Regsiter bit fields */ +#define EPINTR_FIFO_FULL (1<<8) /* fifo full */ +#define EPINTR_FIFO_EMPTY (1<<7) /* fifo empty */ +#define EPINTR_FIFO_ERROR (1<<6) /* fifo error */ +#define EPINTR_FIFO_HIGH (1<<5) /* fifo high */ +#define EPINTR_FIFO_LOW (1<<4) /* fifo low */ +#define EPINTR_MDEVREQ (1<<3) /* multi Device request */ +#define EPINTR_EOT (1<<2) /* fifo end of transfer */ +#define EPINTR_DEVREQ (1<<1) /* Device request */ +#define EPINTR_EOF (1<<0) /* fifo end of frame */ + +/* Debug macros */ +#ifdef DEBUG + +//#define DEBUG_IRQ +//#define DEBUG_REQ +//#define DEBUG_STATES +//#define DEBUG_TRX +//#define DEBUG_INIT +//#define DEBUG_EP0 +#define DEBUG_EPX + +#ifdef DEBUG_IRQ + static void dump_ep_intr(const char *label, int nr, int irqreg, struct device *dev) + { + dev_dbg(dev, "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n", label, nr, + (irqreg & EPINTR_FIFO_FULL) ? " full" : "", + (irqreg & EPINTR_FIFO_EMPTY) ? " fempty" : "", + (irqreg & EPINTR_FIFO_ERROR) ? " ferr" : "", + (irqreg & EPINTR_FIFO_HIGH) ? " fhigh" : "", + (irqreg & EPINTR_FIFO_LOW) ? " flow" : "", + (irqreg & EPINTR_MDEVREQ) ? " mreq" : "", + (irqreg & EPINTR_EOF) ? " eof" : "", + (irqreg & EPINTR_DEVREQ) ? " devreq" : "", + (irqreg & EPINTR_EOT) ? " eot" : ""); + } + + static void dump_intr(const char *label, int irqreg, struct device *dev) + { + dev_dbg(dev, "<%s> USB_INTR=[%s%s%s%s%s%s%s%s%s]\n", label, + (irqreg & INTR_WAKEUP) ? " wake" : "", + (irqreg & INTR_MSOF) ? " msof" : "", + (irqreg & INTR_SOF) ? " sof" : "", + (irqreg & INTR_RESUME) ? " resume" : "", + (irqreg & INTR_SUSPEND) ? " suspend" : "", + (irqreg & INTR_RESET_STOP) ? " noreset" : "", + (irqreg & INTR_RESET_START) ? " reset" : "", + (irqreg & INTR_FRAME_MATCH) ? " fmatch" : "", + (irqreg & INTR_CFG_CHG) ? " config" : ""); + } + #define D_IRQ(dev, args...) dev_dbg(dev, ## args) +#else + #define dump_ep_intr(x, y, z, i) do {} while (0) + #define dump_intr(x, y, z) do {} while (0) + #define D_IRQ(dev, args...) do {} while (0) +#endif /* DEBUG_IRQ */ + +#ifdef DEBUG_REQ + static void dump_req(const char *label, struct imx_ep_struct *imx_ep, struct usb_request *req) + { + int i; + + if (!req || !req->buf) { + dev_dbg(imx_ep->imx_usb->dev, "<%s> req or req buf is free\n", label); + return; + } + + if ((!EP_NO(imx_ep) && imx_ep->imx_usb->ep0state == EP0_IN_DATA_PHASE) + || (EP_NO(imx_ep) && EP_DIR(imx_ep))) { + + dev_dbg(imx_ep->imx_usb->dev, "<%s> ep%d IN request for [%d] bytes; dump <", label, EP_NO(imx_ep), req->length); + for (i = 0; i < req->length; i++) + printk("%02x-", *((u8 *)req->buf + i)); + printk(">\n"); + } else + dev_dbg(imx_ep->imx_usb->dev, "<%s> ep%d OUT request for [%d] bytes\n", label, EP_NO(imx_ep), req->length); + } + #define D_REQ(dev, args...) dev_dbg(dev, ## args) +#else + #define dump_req(x, y, z) do {} while (0) + #define D_REQ(dev, args...) do {} while (0) +#endif /* DEBUG_REQ */ + +#ifdef DEBUG_STATES + static const char *state_name[] = { + "EP0_IDLE", + "EP0_IN_DATA_PHASE", + "EP0_OUT_DATA_PHASE", + "EP0_END_XFER", + "EP0_STALL" + }; + + static void dump_usb_stat(const char *label, struct imx_udc_struct *imx_usb) + { + int temp = __raw_readl(imx_usb->base + USB_STAT); + + dev_dbg(imx_usb->dev, + "<%s> USB_STAT=[%s%s CFG=%d, INTF=%d, ALTR=%d]\n", label, + (temp & STAT_RST) ? " reset" : "", + (temp & STAT_SUSP) ? " suspend" : "", + (temp & STAT_CFG) >> 5, + (temp & STAT_INTF) >> 3, + (temp & STAT_ALTSET)); + } + + static void dump_ep_stat(const char *label, struct imx_ep_struct *imx_ep) + { + int temp = __raw_readl(imx_ep->imx_usb->base + USB_EP_INTR(EP_NO(imx_ep))); + + dev_dbg(imx_ep->imx_usb->dev, + "<%s> EP%d_INTR=[%s%s%s%s%s%s%s%s%s]\n", label, EP_NO(imx_ep), + (temp & EPINTR_FIFO_FULL) ? " full" : "", + (temp & EPINTR_FIFO_EMPTY) ? " fempty" : "", + (temp & EPINTR_FIFO_ERROR) ? " ferr" : "", + (temp & EPINTR_FIFO_HIGH) ? " fhigh" : "", + (temp & EPINTR_FIFO_LOW) ? " flow" : "", + (temp & EPINTR_MDEVREQ) ? " mreq" : "", + (temp & EPINTR_EOF) ? " eof" : "", + (temp & EPINTR_DEVREQ) ? " devreq" : "", + (temp & EPINTR_EOT) ? " eot" : ""); + + temp = __raw_readl(imx_ep->imx_usb->base + USB_EP_STAT(EP_NO(imx_ep))); + + dev_dbg(imx_ep->imx_usb->dev, + "<%s> EP%d_STAT=[%s%s bcount=%d]\n", label, EP_NO(imx_ep), + (temp & EPSTAT_SIP) ? " sip" : "", + (temp & EPSTAT_STALL) ? " stall" : "", + (temp & EPSTAT_BCOUNT) >> 16); + + temp = __raw_readl(imx_ep->imx_usb->base + USB_EP_FSTAT(EP_NO(imx_ep))); + + dev_dbg(imx_ep->imx_usb->dev, + "<%s> EP%d_FSTAT=[%s%s%s%s%s%s%s]\n", label, EP_NO(imx_ep), + (temp & FSTAT_ERR) ? " ferr" : "", + (temp & FSTAT_UF) ? " funder" : "", + (temp & FSTAT_OF) ? " fover" : "", + (temp & FSTAT_FR) ? " fready" : "", + (temp & FSTAT_FULL) ? " ffull" : "", + (temp & FSTAT_ALRM) ? " falarm" : "", + (temp & FSTAT_EMPTY) ? " fempty" : ""); + } + #define D_STT(dev, args...) dev_dbg(dev, ## args) +#else + #define dump_ep_stat(x, y) do {} while (0) + #define dump_usb_stat(x, y) do {} while (0) + #define D_STT(dev, args...) do {} while (0) +#endif /* DEBUG_STATES */ + +#ifdef DEBUG_TRX + #define D_TRX(dev, args...) dev_dbg(dev, ## args) +#else + #define D_TRX(dev, args...) do {} while (0) +#endif /* DEBUG_TRX */ + +#ifdef DEBUG_INIT + #define D_INI(dev, args...) dev_dbg(dev, ## args) +#else + #define D_INI(dev, args...) do {} while (0) +#endif /* DEBUG_INIT */ + +#ifdef DEBUG_EP0 + #define D_EP0(dev, args...) dev_dbg(dev, ## args) +#else + #define D_EP0(dev, args...) do {} while (0) +#endif /* DEBUG_EP0 */ + +#ifdef DEBUG_EPX + #define D_EPX(dev, args...) dev_dbg(dev, ## args) +#else + #define D_EPX(dev, args...) do {} while (0) +#endif /* DEBUG_EP0 */ + +#endif /* DEBUG */ + +#endif /* __LINUX_USB_GADGET_IMX_H */ diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c index 3a8879ec2061..43dcf9e1af6b 100644 --- a/drivers/usb/gadget/m66592-udc.c +++ b/drivers/usb/gadget/m66592-udc.c @@ -1546,8 +1546,6 @@ static void nop_completion(struct usb_ep *ep, struct usb_request *r) { } -#define resource_len(r) (((r)->end - (r)->start) + 1) - static int __init m66592_probe(struct platform_device *pdev) { struct resource *res; @@ -1560,11 +1558,10 @@ static int __init m66592_probe(struct platform_device *pdev) int ret = 0; int i; - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - (char *)udc_name); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { ret = -ENODEV; - pr_err("platform_get_resource_byname error.\n"); + pr_err("platform_get_resource error.\n"); goto clean_up; } @@ -1575,7 +1572,7 @@ static int __init m66592_probe(struct platform_device *pdev) goto clean_up; } - reg = ioremap(res->start, resource_len(res)); + reg = ioremap(res->start, resource_size(res)); if (reg == NULL) { ret = -ENOMEM; pr_err("ioremap error.\n"); diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c index 8ae70de2c37d..12c6d83b218c 100644 --- a/drivers/usb/gadget/net2280.c +++ b/drivers/usb/gadget/net2280.c @@ -669,7 +669,7 @@ fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ wmb (); - td->dmacount = cpu_to_le32p (&dmacount); + td->dmacount = cpu_to_le32(dmacount); } static const u32 dmactl_default = diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c index 34e9e393f929..57d9641c6bf8 100644 --- a/drivers/usb/gadget/omap_udc.c +++ b/drivers/usb/gadget/omap_udc.c @@ -3006,7 +3006,7 @@ cleanup1: cleanup0: if (xceiv) - put_device(xceiv->dev); + otg_put_transceiver(xceiv); if (cpu_is_omap16xx() || cpu_is_omap24xx()) { clk_disable(hhc_clk); @@ -3034,7 +3034,7 @@ static int __exit omap_udc_remove(struct platform_device *pdev) pullup_disable(udc); if (udc->transceiver) { - put_device(udc->transceiver->dev); + otg_put_transceiver(udc->transceiver); udc->transceiver = NULL; } omap_writew(0, UDC_SYSCON1); diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c index 697a0ca349bf..9b36205c5759 100644 --- a/drivers/usb/gadget/pxa25x_udc.c +++ b/drivers/usb/gadget/pxa25x_udc.c @@ -2198,7 +2198,7 @@ static int __init pxa25x_udc_probe(struct platform_device *pdev) udc_disable(dev); udc_reinit(dev); - dev->vbus = is_vbus_present(); + dev->vbus = !!is_vbus_present(); /* irq setup after old hardware state is cleaned up */ retval = request_irq(irq, pxa25x_udc_irq, diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c index 65110d02a206..990f40f988d4 100644 --- a/drivers/usb/gadget/pxa27x_udc.c +++ b/drivers/usb/gadget/pxa27x_udc.c @@ -430,7 +430,6 @@ static void pio_irq_enable(struct pxa_ep *ep) /** * pio_irq_disable - Disables irq generation for one endpoint * @ep: udc endpoint - * @index: endpoint number */ static void pio_irq_disable(struct pxa_ep *ep) { @@ -586,7 +585,6 @@ static void inc_ep_stats_reqs(struct pxa_ep *ep, int is_in) * inc_ep_stats_bytes - Update ep stats counts * @ep: physical endpoint * @count: bytes transfered on endpoint - * @req: usb request * @is_in: ep direction (USB_DIR_IN or 0) */ static void inc_ep_stats_bytes(struct pxa_ep *ep, int count, int is_in) diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c index c7e255636803..9a2b8920532d 100644 --- a/drivers/usb/gadget/s3c2410_udc.c +++ b/drivers/usb/gadget/s3c2410_udc.c @@ -36,6 +36,7 @@ #include <linux/interrupt.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/gpio.h> #include <linux/debugfs.h> #include <linux/seq_file.h> @@ -51,7 +52,6 @@ #include <mach/irqs.h> #include <mach/hardware.h> -#include <mach/regs-gpio.h> #include <plat/regs-udc.h> #include <plat/udc.h> @@ -1510,11 +1510,7 @@ static irqreturn_t s3c2410_udc_vbus_irq(int irq, void *_dev) dprintk(DEBUG_NORMAL, "%s()\n", __func__); - /* some cpus cannot read from an line configured to IRQ! */ - s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_INPUT); - value = s3c2410_gpio_getpin(udc_info->vbus_pin); - s3c2410_gpio_cfgpin(udc_info->vbus_pin, S3C2410_GPIO_SFN2); - + value = gpio_get_value(udc_info->vbus_pin) ? 1 : 0; if (udc_info->vbus_pin_inverted) value = !value; @@ -1802,7 +1798,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev) struct s3c2410_udc *udc = &memory; struct device *dev = &pdev->dev; int retval; - unsigned int irq; + int irq; dev_dbg(dev, "%s()\n", __func__); @@ -1861,7 +1857,7 @@ static int s3c2410_udc_probe(struct platform_device *pdev) /* irq setup after old hardware state is cleaned up */ retval = request_irq(IRQ_USBD, s3c2410_udc_irq, - IRQF_DISABLED, gadget_name, udc); + IRQF_DISABLED, gadget_name, udc); if (retval != 0) { dev_err(dev, "cannot get irq %i, err %d\n", IRQ_USBD, retval); @@ -1872,17 +1868,28 @@ static int s3c2410_udc_probe(struct platform_device *pdev) dev_dbg(dev, "got irq %i\n", IRQ_USBD); if (udc_info && udc_info->vbus_pin > 0) { - irq = s3c2410_gpio_getirq(udc_info->vbus_pin); + retval = gpio_request(udc_info->vbus_pin, "udc vbus"); + if (retval < 0) { + dev_err(dev, "cannot claim vbus pin\n"); + goto err_int; + } + + irq = gpio_to_irq(udc_info->vbus_pin); + if (irq < 0) { + dev_err(dev, "no irq for gpio vbus pin\n"); + goto err_gpio_claim; + } + retval = request_irq(irq, s3c2410_udc_vbus_irq, IRQF_DISABLED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING | IRQF_SHARED, gadget_name, udc); if (retval != 0) { - dev_err(dev, "can't get vbus irq %i, err %d\n", + dev_err(dev, "can't get vbus irq %d, err %d\n", irq, retval); retval = -EBUSY; - goto err_int; + goto err_gpio_claim; } dev_dbg(dev, "got irq %i\n", irq); @@ -1902,6 +1909,9 @@ static int s3c2410_udc_probe(struct platform_device *pdev) return 0; +err_gpio_claim: + if (udc_info && udc_info->vbus_pin > 0) + gpio_free(udc_info->vbus_pin); err_int: free_irq(IRQ_USBD, udc); err_map: @@ -1927,7 +1937,7 @@ static int s3c2410_udc_remove(struct platform_device *pdev) debugfs_remove(udc->regs_info); if (udc_info && udc_info->vbus_pin > 0) { - irq = s3c2410_gpio_getirq(udc_info->vbus_pin); + irq = gpio_to_irq(udc_info->vbus_pin); free_irq(irq, udc); } diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index f3a75a929e0a..2b476b6b3d4d 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -96,6 +96,19 @@ config USB_EHCI_HCD_PPC_OF Enables support for the USB controller present on the PowerPC OpenFirmware platform bus. +config USB_OXU210HP_HCD + tristate "OXU210HP HCD support" + depends on USB + ---help--- + The OXU210HP is an USB host/OTG/device controller. Enable this + option if your board has this chip. If unsure, say N. + + This driver does not support isochronous transfers and doesn't + implement OTG nor USB device controllers. + + To compile this driver as a module, choose M here: the + module will be called oxu210hp-hcd. + config USB_ISP116X_HCD tristate "ISP116X HCD support" depends on USB diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 23be22224044..e5f3f20787e4 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -13,6 +13,7 @@ obj-$(CONFIG_USB_WHCI_HCD) += whci/ obj-$(CONFIG_PCI) += pci-quirks.o obj-$(CONFIG_USB_EHCI_HCD) += ehci-hcd.o +obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o obj-$(CONFIG_USB_OHCI_HCD) += ohci-hcd.o obj-$(CONFIG_USB_UHCI_HCD) += uhci-hcd.o diff --git a/drivers/usb/host/ehci-dbg.c b/drivers/usb/host/ehci-dbg.c index 0cb53ca8d343..7f4ace73d44a 100644 --- a/drivers/usb/host/ehci-dbg.c +++ b/drivers/usb/host/ehci-dbg.c @@ -455,9 +455,7 @@ static void qh_lines ( (scratch >> 16) & 0x7fff, scratch, td->urb); - if (temp < 0) - temp = 0; - else if (size < temp) + if (size < temp) temp = size; size -= temp; next += temp; @@ -466,9 +464,7 @@ static void qh_lines ( } temp = snprintf (next, size, "\n"); - if (temp < 0) - temp = 0; - else if (size < temp) + if (size < temp) temp = size; size -= temp; next += temp; diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c index 218f9660d7ee..97a53a48a3d8 100644 --- a/drivers/usb/host/ehci-hub.c +++ b/drivers/usb/host/ehci-hub.c @@ -194,6 +194,7 @@ static int ehci_bus_resume (struct usb_hcd *hcd) u32 temp; u32 power_okay; int i; + u8 resume_needed = 0; if (time_before (jiffies, ehci->next_statechange)) msleep(5); @@ -228,7 +229,9 @@ static int ehci_bus_resume (struct usb_hcd *hcd) /* Some controller/firmware combinations need a delay during which * they set up the port statuses. See Bugzilla #8190. */ - mdelay(8); + spin_unlock_irq(&ehci->lock); + msleep(8); + spin_lock_irq(&ehci->lock); /* manually resume the ports we suspended during bus_suspend() */ i = HCS_N_PORTS (ehci->hcs_params); @@ -236,12 +239,21 @@ static int ehci_bus_resume (struct usb_hcd *hcd) temp = ehci_readl(ehci, &ehci->regs->port_status [i]); temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); if (test_bit(i, &ehci->bus_suspended) && - (temp & PORT_SUSPEND)) + (temp & PORT_SUSPEND)) { temp |= PORT_RESUME; + resume_needed = 1; + } ehci_writel(ehci, temp, &ehci->regs->port_status [i]); } + + /* msleep for 20ms only if code is trying to resume port */ + if (resume_needed) { + spin_unlock_irq(&ehci->lock); + msleep(20); + spin_lock_irq(&ehci->lock); + } + i = HCS_N_PORTS (ehci->hcs_params); - mdelay (20); while (i--) { temp = ehci_readl(ehci, &ehci->regs->port_status [i]); if (test_bit(i, &ehci->bus_suspended) && @@ -422,8 +434,15 @@ static int check_reset_complete ( port_status &= ~PORT_RWC_BITS; ehci_writel(ehci, port_status, status_reg); - } else + /* ensure 440EPX ohci controller state is operational */ + if (ehci->has_amcc_usb23) + set_ohci_hcfs(ehci, 1); + } else { ehci_dbg (ehci, "port %d high speed\n", index + 1); + /* ensure 440EPx ohci controller state is suspended */ + if (ehci->has_amcc_usb23) + set_ohci_hcfs(ehci, 0); + } return port_status; } diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c index b018deed2e8f..ef732b704f53 100644 --- a/drivers/usb/host/ehci-ppc-of.c +++ b/drivers/usb/host/ehci-ppc-of.c @@ -107,11 +107,13 @@ ehci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) { struct device_node *dn = op->node; struct usb_hcd *hcd; - struct ehci_hcd *ehci; + struct ehci_hcd *ehci = NULL; struct resource res; int irq; int rv; + struct device_node *np; + if (usb_disabled()) return -ENODEV; @@ -149,6 +151,20 @@ ehci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) } ehci = hcd_to_ehci(hcd); + np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx"); + if (np != NULL) { + /* claim we really affected by usb23 erratum */ + if (!of_address_to_resource(np, 0, &res)) + ehci->ohci_hcctrl_reg = ioremap(res.start + + OHCI_HCCTRL_OFFSET, OHCI_HCCTRL_LEN); + else + pr_debug(__FILE__ ": no ohci offset in fdt\n"); + if (!ehci->ohci_hcctrl_reg) { + pr_debug(__FILE__ ": ioremap for ohci hcctrl failed\n"); + } else { + ehci->has_amcc_usb23 = 1; + } + } if (of_get_property(dn, "big-endian", NULL)) { ehci->big_endian_mmio = 1; @@ -181,6 +197,9 @@ err_ioremap: irq_dispose_mapping(irq); err_irq: release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + + if (ehci->has_amcc_usb23) + iounmap(ehci->ohci_hcctrl_reg); err_rmr: usb_put_hcd(hcd); @@ -191,6 +210,11 @@ err_rmr: static int ehci_hcd_ppc_of_remove(struct of_device *op) { struct usb_hcd *hcd = dev_get_drvdata(&op->dev); + struct ehci_hcd *ehci = hcd_to_ehci(hcd); + + struct device_node *np; + struct resource res; + dev_set_drvdata(&op->dev, NULL); dev_dbg(&op->dev, "stopping PPC-OF USB Controller\n"); @@ -201,6 +225,25 @@ static int ehci_hcd_ppc_of_remove(struct of_device *op) irq_dispose_mapping(hcd->irq); release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + /* use request_mem_region to test if the ohci driver is loaded. if so + * ensure the ohci core is operational. + */ + if (ehci->has_amcc_usb23) { + np = of_find_compatible_node(NULL, NULL, "ibm,usb-ohci-440epx"); + if (np != NULL) { + if (!of_address_to_resource(np, 0, &res)) + if (!request_mem_region(res.start, + 0x4, hcd_name)) + set_ohci_hcfs(ehci, 1); + else + release_mem_region(res.start, 0x4); + else + pr_debug(__FILE__ ": no ohci offset in fdt\n"); + of_node_put(np); + } + + iounmap(ehci->ohci_hcctrl_reg); + } usb_put_hcd(hcd); return 0; diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index c7d4b5a06bdb..fb7054ccf4fc 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -120,6 +120,16 @@ struct ehci_hcd { /* one per controller */ unsigned has_fsl_port_bug:1; /* FreeScale */ unsigned big_endian_mmio:1; unsigned big_endian_desc:1; + unsigned has_amcc_usb23:1; + + /* required for usb32 quirk */ + #define OHCI_CTRL_HCFS (3 << 6) + #define OHCI_USB_OPER (2 << 6) + #define OHCI_USB_SUSPEND (3 << 6) + + #define OHCI_HCCTRL_OFFSET 0x4 + #define OHCI_HCCTRL_LEN 0x4 + __hc32 *ohci_hcctrl_reg; u8 sbrn; /* packed release number */ @@ -636,6 +646,30 @@ static inline void ehci_writel(const struct ehci_hcd *ehci, #endif } +/* + * On certain ppc-44x SoC there is a HW issue, that could only worked around with + * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch. + * Other common bits are dependant on has_amcc_usb23 quirk flag. + */ +#ifdef CONFIG_44x +static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational) +{ + u32 hc_control; + + hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS); + if (operational) + hc_control |= OHCI_USB_OPER; + else + hc_control |= OHCI_USB_SUSPEND; + + writel_be(hc_control, ehci->ohci_hcctrl_reg); + (void) readl_be(ehci->ohci_hcctrl_reg); +} +#else +static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational) +{ } +#endif + /*-------------------------------------------------------------------------*/ /* diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c index e306ca6aef3d..100bf3d8437c 100644 --- a/drivers/usb/host/ohci-pnx4008.c +++ b/drivers/usb/host/ohci-pnx4008.c @@ -106,65 +106,34 @@ extern int ocpi_enable(void); static struct clk *usb_clk; -static int isp1301_probe(struct i2c_adapter *adap); -static int isp1301_detach(struct i2c_client *client); - static const unsigned short normal_i2c[] = { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END }; -static const unsigned short dummy_i2c_addrlist[] = { I2C_CLIENT_END }; - -static struct i2c_client_address_data addr_data = { - .normal_i2c = normal_i2c, - .probe = dummy_i2c_addrlist, - .ignore = dummy_i2c_addrlist, -}; - -struct i2c_driver isp1301_driver = { - .driver = { - .name = "isp1301_pnx", - }, - .attach_adapter = isp1301_probe, - .detach_client = isp1301_detach, -}; -static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind) +static int isp1301_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct i2c_client *c; - int err; - - c = kzalloc(sizeof(*c), GFP_KERNEL); - if (!c) - return -ENOMEM; - - strlcpy(c->name, "isp1301_pnx", I2C_NAME_SIZE); - c->flags = 0; - c->addr = addr; - c->adapter = adap; - c->driver = &isp1301_driver; - - err = i2c_attach_client(c); - if (err) { - kfree(c); - return err; - } - - isp1301_i2c_client = c; - return 0; } -static int isp1301_probe(struct i2c_adapter *adap) +static int isp1301_remove(struct i2c_client *client) { - return i2c_probe(adap, &addr_data, isp1301_attach); -} - -static int isp1301_detach(struct i2c_client *client) -{ - i2c_detach_client(client); - kfree(isp1301_i2c_client); return 0; } +const struct i2c_device_id isp1301_id[] = { + { "isp1301_pnx", 0 }, + { } +}; + +struct i2c_driver isp1301_driver = { + .driver = { + .name = "isp1301_pnx", + }, + .probe = isp1301_probe, + .remove = isp1301_remove, + .id_table = isp1301_id, +}; + static void i2c_write(u8 buf, u8 subaddr) { char tmpbuf[2]; @@ -328,6 +297,8 @@ static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev) struct usb_hcd *hcd = 0; struct ohci_hcd *ohci; const struct hc_driver *driver = &ohci_pnx4008_hc_driver; + struct i2c_adapter *i2c_adap; + struct i2c_board_info i2c_info; int ret = 0, irq; @@ -351,9 +322,20 @@ static int __devinit usb_hcd_pnx4008_probe(struct platform_device *pdev) ret = i2c_add_driver(&isp1301_driver); if (ret < 0) { - err("failed to connect I2C to ISP1301 USB Transceiver"); + err("failed to add ISP1301 driver"); goto out; } + i2c_adap = i2c_get_adapter(2); + memset(&i2c_info, 0, sizeof(struct i2c_board_info)); + strlcpy(i2c_info.name, "isp1301_pnx", I2C_NAME_SIZE); + isp1301_i2c_client = i2c_new_probed_device(i2c_adap, &i2c_info, + normal_i2c); + i2c_put_adapter(i2c_adap); + if (!isp1301_i2c_client) { + err("failed to connect I2C to ISP1301 USB Transceiver"); + ret = -ENODEV; + goto out_i2c_driver; + } isp1301_configure(); @@ -429,6 +411,9 @@ out3: out2: clk_put(usb_clk); out1: + i2c_unregister_client(isp1301_i2c_client); + isp1301_i2c_client = NULL; +out_i2c_driver: i2c_del_driver(&isp1301_driver); out: return ret; @@ -445,6 +430,8 @@ static int usb_hcd_pnx4008_remove(struct platform_device *pdev) pnx4008_unset_usb_bits(); clk_disable(usb_clk); clk_put(usb_clk); + i2c_unregister_client(isp1301_i2c_client); + isp1301_i2c_client = NULL; i2c_del_driver(&isp1301_driver); platform_set_drvdata(pdev, NULL); diff --git a/drivers/usb/host/ohci-ppc-of.c b/drivers/usb/host/ohci-ppc-of.c index 7ac53264ead3..68a301710297 100644 --- a/drivers/usb/host/ohci-ppc-of.c +++ b/drivers/usb/host/ohci-ppc-of.c @@ -91,6 +91,7 @@ ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) int rv; int is_bigendian; + struct device_node *np; if (usb_disabled()) return -ENODEV; @@ -147,6 +148,30 @@ ohci_hcd_ppc_of_probe(struct of_device *op, const struct of_device_id *match) if (rv == 0) return 0; + /* by now, 440epx is known to show usb_23 erratum */ + np = of_find_compatible_node(NULL, NULL, "ibm,usb-ehci-440epx"); + + /* Work around - At this point ohci_run has executed, the + * controller is running, everything, the root ports, etc., is + * set up. If the ehci driver is loaded, put the ohci core in + * the suspended state. The ehci driver will bring it out of + * suspended state when / if a non-high speed USB device is + * attached to the USB Host port. If the ehci driver is not + * loaded, do nothing. request_mem_region is used to test if + * the ehci driver is loaded. + */ + if (np != NULL) { + if (!of_address_to_resource(np, 0, &res)) { + if (!request_mem_region(res.start, 0x4, hcd_name)) { + writel_be((readl_be(&ohci->regs->control) | + OHCI_USB_SUSPEND), &ohci->regs->control); + (void) readl_be(&ohci->regs->control); + } else + release_mem_region(res.start, 0x4); + } else + pr_debug(__FILE__ ": cannot get ehci offset from fdt\n"); + } + iounmap(hcd->regs); err_ioremap: irq_dispose_mapping(irq); diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c index f9f134af0bd1..8dabe8e31d8c 100644 --- a/drivers/usb/host/ohci-tmio.c +++ b/drivers/usb/host/ohci-tmio.c @@ -201,7 +201,7 @@ static int __devinit ohci_hcd_tmio_drv_probe(struct platform_device *dev) if (!cell) return -EINVAL; - hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev->dev.bus_id); + hcd = usb_create_hcd(&ohci_tmio_hc_driver, &dev->dev, dev_name(&dev->dev)); if (!hcd) { ret = -ENOMEM; goto err_usb_create_hcd; diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c new file mode 100644 index 000000000000..75548f7c716b --- /dev/null +++ b/drivers/usb/host/oxu210hp-hcd.c @@ -0,0 +1,3985 @@ +/* + * Copyright (c) 2008 Rodolfo Giometti <giometti@linux.it> + * Copyright (c) 2008 Eurotech S.p.A. <info@eurtech.it> + * + * This code is *strongly* based on EHCI-HCD code by David Brownell since + * the chip is a quasi-EHCI compatible. + * + * 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. + * + * 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., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/dmapool.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/timer.h> +#include <linux/list.h> +#include <linux/interrupt.h> +#include <linux/reboot.h> +#include <linux/usb.h> +#include <linux/moduleparam.h> +#include <linux/dma-mapping.h> +#include <linux/io.h> + +#include "../core/hcd.h" + +#include <asm/irq.h> +#include <asm/system.h> +#include <asm/unaligned.h> + +#include <linux/irq.h> +#include <linux/platform_device.h> + +#include "oxu210hp.h" + +#define DRIVER_VERSION "0.0.50" + +/* + * Main defines + */ + +#define oxu_dbg(oxu, fmt, args...) \ + dev_dbg(oxu_to_hcd(oxu)->self.controller , fmt , ## args) +#define oxu_err(oxu, fmt, args...) \ + dev_err(oxu_to_hcd(oxu)->self.controller , fmt , ## args) +#define oxu_info(oxu, fmt, args...) \ + dev_info(oxu_to_hcd(oxu)->self.controller , fmt , ## args) + +static inline struct usb_hcd *oxu_to_hcd(struct oxu_hcd *oxu) +{ + return container_of((void *) oxu, struct usb_hcd, hcd_priv); +} + +static inline struct oxu_hcd *hcd_to_oxu(struct usb_hcd *hcd) +{ + return (struct oxu_hcd *) (hcd->hcd_priv); +} + +/* + * Debug stuff + */ + +#undef OXU_URB_TRACE +#undef OXU_VERBOSE_DEBUG + +#ifdef OXU_VERBOSE_DEBUG +#define oxu_vdbg oxu_dbg +#else +#define oxu_vdbg(oxu, fmt, args...) /* Nop */ +#endif + +#ifdef DEBUG + +static int __attribute__((__unused__)) +dbg_status_buf(char *buf, unsigned len, const char *label, u32 status) +{ + return scnprintf(buf, len, "%s%sstatus %04x%s%s%s%s%s%s%s%s%s%s", + label, label[0] ? " " : "", status, + (status & STS_ASS) ? " Async" : "", + (status & STS_PSS) ? " Periodic" : "", + (status & STS_RECL) ? " Recl" : "", + (status & STS_HALT) ? " Halt" : "", + (status & STS_IAA) ? " IAA" : "", + (status & STS_FATAL) ? " FATAL" : "", + (status & STS_FLR) ? " FLR" : "", + (status & STS_PCD) ? " PCD" : "", + (status & STS_ERR) ? " ERR" : "", + (status & STS_INT) ? " INT" : "" + ); +} + +static int __attribute__((__unused__)) +dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable) +{ + return scnprintf(buf, len, "%s%sintrenable %02x%s%s%s%s%s%s", + label, label[0] ? " " : "", enable, + (enable & STS_IAA) ? " IAA" : "", + (enable & STS_FATAL) ? " FATAL" : "", + (enable & STS_FLR) ? " FLR" : "", + (enable & STS_PCD) ? " PCD" : "", + (enable & STS_ERR) ? " ERR" : "", + (enable & STS_INT) ? " INT" : "" + ); +} + +static const char *const fls_strings[] = + { "1024", "512", "256", "??" }; + +static int dbg_command_buf(char *buf, unsigned len, + const char *label, u32 command) +{ + return scnprintf(buf, len, + "%s%scommand %06x %s=%d ithresh=%d%s%s%s%s period=%s%s %s", + label, label[0] ? " " : "", command, + (command & CMD_PARK) ? "park" : "(park)", + CMD_PARK_CNT(command), + (command >> 16) & 0x3f, + (command & CMD_LRESET) ? " LReset" : "", + (command & CMD_IAAD) ? " IAAD" : "", + (command & CMD_ASE) ? " Async" : "", + (command & CMD_PSE) ? " Periodic" : "", + fls_strings[(command >> 2) & 0x3], + (command & CMD_RESET) ? " Reset" : "", + (command & CMD_RUN) ? "RUN" : "HALT" + ); +} + +static int dbg_port_buf(char *buf, unsigned len, const char *label, + int port, u32 status) +{ + char *sig; + + /* signaling state */ + switch (status & (3 << 10)) { + case 0 << 10: + sig = "se0"; + break; + case 1 << 10: + sig = "k"; /* low speed */ + break; + case 2 << 10: + sig = "j"; + break; + default: + sig = "?"; + break; + } + + return scnprintf(buf, len, + "%s%sport %d status %06x%s%s sig=%s%s%s%s%s%s%s%s%s%s", + label, label[0] ? " " : "", port, status, + (status & PORT_POWER) ? " POWER" : "", + (status & PORT_OWNER) ? " OWNER" : "", + sig, + (status & PORT_RESET) ? " RESET" : "", + (status & PORT_SUSPEND) ? " SUSPEND" : "", + (status & PORT_RESUME) ? " RESUME" : "", + (status & PORT_OCC) ? " OCC" : "", + (status & PORT_OC) ? " OC" : "", + (status & PORT_PEC) ? " PEC" : "", + (status & PORT_PE) ? " PE" : "", + (status & PORT_CSC) ? " CSC" : "", + (status & PORT_CONNECT) ? " CONNECT" : "" + ); +} + +#else + +static inline int __attribute__((__unused__)) +dbg_status_buf(char *buf, unsigned len, const char *label, u32 status) +{ return 0; } + +static inline int __attribute__((__unused__)) +dbg_command_buf(char *buf, unsigned len, const char *label, u32 command) +{ return 0; } + +static inline int __attribute__((__unused__)) +dbg_intr_buf(char *buf, unsigned len, const char *label, u32 enable) +{ return 0; } + +static inline int __attribute__((__unused__)) +dbg_port_buf(char *buf, unsigned len, const char *label, int port, u32 status) +{ return 0; } + +#endif /* DEBUG */ + +/* functions have the "wrong" filename when they're output... */ +#define dbg_status(oxu, label, status) { \ + char _buf[80]; \ + dbg_status_buf(_buf, sizeof _buf, label, status); \ + oxu_dbg(oxu, "%s\n", _buf); \ +} + +#define dbg_cmd(oxu, label, command) { \ + char _buf[80]; \ + dbg_command_buf(_buf, sizeof _buf, label, command); \ + oxu_dbg(oxu, "%s\n", _buf); \ +} + +#define dbg_port(oxu, label, port, status) { \ + char _buf[80]; \ + dbg_port_buf(_buf, sizeof _buf, label, port, status); \ + oxu_dbg(oxu, "%s\n", _buf); \ +} + +/* + * Module parameters + */ + +/* Initial IRQ latency: faster than hw default */ +static int log2_irq_thresh; /* 0 to 6 */ +module_param(log2_irq_thresh, int, S_IRUGO); +MODULE_PARM_DESC(log2_irq_thresh, "log2 IRQ latency, 1-64 microframes"); + +/* Initial park setting: slower than hw default */ +static unsigned park; +module_param(park, uint, S_IRUGO); +MODULE_PARM_DESC(park, "park setting; 1-3 back-to-back async packets"); + +/* For flakey hardware, ignore overcurrent indicators */ +static int ignore_oc; +module_param(ignore_oc, bool, S_IRUGO); +MODULE_PARM_DESC(ignore_oc, "ignore bogus hardware overcurrent indications"); + + +static void ehci_work(struct oxu_hcd *oxu); +static int oxu_hub_control(struct usb_hcd *hcd, + u16 typeReq, u16 wValue, u16 wIndex, + char *buf, u16 wLength); + +/* + * Local functions + */ + +/* Low level read/write registers functions */ +static inline u32 oxu_readl(void *base, u32 reg) +{ + return readl(base + reg); +} + +static inline void oxu_writel(void *base, u32 reg, u32 val) +{ + writel(val, base + reg); +} + +static inline void timer_action_done(struct oxu_hcd *oxu, + enum ehci_timer_action action) +{ + clear_bit(action, &oxu->actions); +} + +static inline void timer_action(struct oxu_hcd *oxu, + enum ehci_timer_action action) +{ + if (!test_and_set_bit(action, &oxu->actions)) { + unsigned long t; + + switch (action) { + case TIMER_IAA_WATCHDOG: + t = EHCI_IAA_JIFFIES; + break; + case TIMER_IO_WATCHDOG: + t = EHCI_IO_JIFFIES; + break; + case TIMER_ASYNC_OFF: + t = EHCI_ASYNC_JIFFIES; + break; + case TIMER_ASYNC_SHRINK: + default: + t = EHCI_SHRINK_JIFFIES; + break; + } + t += jiffies; + /* all timings except IAA watchdog can be overridden. + * async queue SHRINK often precedes IAA. while it's ready + * to go OFF neither can matter, and afterwards the IO + * watchdog stops unless there's still periodic traffic. + */ + if (action != TIMER_IAA_WATCHDOG + && t > oxu->watchdog.expires + && timer_pending(&oxu->watchdog)) + return; + mod_timer(&oxu->watchdog, t); + } +} + +/* + * handshake - spin reading hc until handshake completes or fails + * @ptr: address of hc register to be read + * @mask: bits to look at in result of read + * @done: value of those bits when handshake succeeds + * @usec: timeout in microseconds + * + * Returns negative errno, or zero on success + * + * Success happens when the "mask" bits have the specified value (hardware + * handshake done). There are two failure modes: "usec" have passed (major + * hardware flakeout), or the register reads as all-ones (hardware removed). + * + * That last failure should_only happen in cases like physical cardbus eject + * before driver shutdown. But it also seems to be caused by bugs in cardbus + * bridge shutdown: shutting down the bridge before the devices using it. + */ +static int handshake(struct oxu_hcd *oxu, void __iomem *ptr, + u32 mask, u32 done, int usec) +{ + u32 result; + + do { + result = readl(ptr); + if (result == ~(u32)0) /* card removed */ + return -ENODEV; + result &= mask; + if (result == done) + return 0; + udelay(1); + usec--; + } while (usec > 0); + return -ETIMEDOUT; +} + +/* Force HC to halt state from unknown (EHCI spec section 2.3) */ +static int ehci_halt(struct oxu_hcd *oxu) +{ + u32 temp = readl(&oxu->regs->status); + + /* disable any irqs left enabled by previous code */ + writel(0, &oxu->regs->intr_enable); + + if ((temp & STS_HALT) != 0) + return 0; + + temp = readl(&oxu->regs->command); + temp &= ~CMD_RUN; + writel(temp, &oxu->regs->command); + return handshake(oxu, &oxu->regs->status, + STS_HALT, STS_HALT, 16 * 125); +} + +/* Put TDI/ARC silicon into EHCI mode */ +static void tdi_reset(struct oxu_hcd *oxu) +{ + u32 __iomem *reg_ptr; + u32 tmp; + + reg_ptr = (u32 __iomem *)(((u8 __iomem *)oxu->regs) + 0x68); + tmp = readl(reg_ptr); + tmp |= 0x3; + writel(tmp, reg_ptr); +} + +/* Reset a non-running (STS_HALT == 1) controller */ +static int ehci_reset(struct oxu_hcd *oxu) +{ + int retval; + u32 command = readl(&oxu->regs->command); + + command |= CMD_RESET; + dbg_cmd(oxu, "reset", command); + writel(command, &oxu->regs->command); + oxu_to_hcd(oxu)->state = HC_STATE_HALT; + oxu->next_statechange = jiffies; + retval = handshake(oxu, &oxu->regs->command, + CMD_RESET, 0, 250 * 1000); + + if (retval) + return retval; + + tdi_reset(oxu); + + return retval; +} + +/* Idle the controller (from running) */ +static void ehci_quiesce(struct oxu_hcd *oxu) +{ + u32 temp; + +#ifdef DEBUG + if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) + BUG(); +#endif + + /* wait for any schedule enables/disables to take effect */ + temp = readl(&oxu->regs->command) << 10; + temp &= STS_ASS | STS_PSS; + if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS, + temp, 16 * 125) != 0) { + oxu_to_hcd(oxu)->state = HC_STATE_HALT; + return; + } + + /* then disable anything that's still active */ + temp = readl(&oxu->regs->command); + temp &= ~(CMD_ASE | CMD_IAAD | CMD_PSE); + writel(temp, &oxu->regs->command); + + /* hardware can take 16 microframes to turn off ... */ + if (handshake(oxu, &oxu->regs->status, STS_ASS | STS_PSS, + 0, 16 * 125) != 0) { + oxu_to_hcd(oxu)->state = HC_STATE_HALT; + return; + } +} + +static int check_reset_complete(struct oxu_hcd *oxu, int index, + u32 __iomem *status_reg, int port_status) +{ + if (!(port_status & PORT_CONNECT)) { + oxu->reset_done[index] = 0; + return port_status; + } + + /* if reset finished and it's still not enabled -- handoff */ + if (!(port_status & PORT_PE)) { + oxu_dbg(oxu, "Failed to enable port %d on root hub TT\n", + index+1); + return port_status; + } else + oxu_dbg(oxu, "port %d high speed\n", index + 1); + + return port_status; +} + +static void ehci_hub_descriptor(struct oxu_hcd *oxu, + struct usb_hub_descriptor *desc) +{ + int ports = HCS_N_PORTS(oxu->hcs_params); + u16 temp; + + desc->bDescriptorType = 0x29; + desc->bPwrOn2PwrGood = 10; /* oxu 1.0, 2.3.9 says 20ms max */ + desc->bHubContrCurrent = 0; + + desc->bNbrPorts = ports; + temp = 1 + (ports / 8); + desc->bDescLength = 7 + 2 * temp; + + /* two bitmaps: ports removable, and usb 1.0 legacy PortPwrCtrlMask */ + memset(&desc->bitmap[0], 0, temp); + memset(&desc->bitmap[temp], 0xff, temp); + + temp = 0x0008; /* per-port overcurrent reporting */ + if (HCS_PPC(oxu->hcs_params)) + temp |= 0x0001; /* per-port power control */ + else + temp |= 0x0002; /* no power switching */ + desc->wHubCharacteristics = (__force __u16)cpu_to_le16(temp); +} + + +/* Allocate an OXU210HP on-chip memory data buffer + * + * An on-chip memory data buffer is required for each OXU210HP USB transfer. + * Each transfer descriptor has one or more on-chip memory data buffers. + * + * Data buffers are allocated from a fix sized pool of data blocks. + * To minimise fragmentation and give reasonable memory utlisation, + * data buffers are allocated with sizes the power of 2 multiples of + * the block size, starting on an address a multiple of the allocated size. + * + * FIXME: callers of this function require a buffer to be allocated for + * len=0. This is a waste of on-chip memory and should be fix. Then this + * function should be changed to not allocate a buffer for len=0. + */ +static int oxu_buf_alloc(struct oxu_hcd *oxu, struct ehci_qtd *qtd, int len) +{ + int n_blocks; /* minium blocks needed to hold len */ + int a_blocks; /* blocks allocated */ + int i, j; + + /* Don't allocte bigger than supported */ + if (len > BUFFER_SIZE * BUFFER_NUM) { + oxu_err(oxu, "buffer too big (%d)\n", len); + return -ENOMEM; + } + + spin_lock(&oxu->mem_lock); + + /* Number of blocks needed to hold len */ + n_blocks = (len + BUFFER_SIZE - 1) / BUFFER_SIZE; + + /* Round the number of blocks up to the power of 2 */ + for (a_blocks = 1; a_blocks < n_blocks; a_blocks <<= 1) + ; + + /* Find a suitable available data buffer */ + for (i = 0; i < BUFFER_NUM; + i += max(a_blocks, (int)oxu->db_used[i])) { + + /* Check all the required blocks are available */ + for (j = 0; j < a_blocks; j++) + if (oxu->db_used[i + j]) + break; + + if (j != a_blocks) + continue; + + /* Allocate blocks found! */ + qtd->buffer = (void *) &oxu->mem->db_pool[i]; + qtd->buffer_dma = virt_to_phys(qtd->buffer); + + qtd->qtd_buffer_len = BUFFER_SIZE * a_blocks; + oxu->db_used[i] = a_blocks; + + spin_unlock(&oxu->mem_lock); + + return 0; + } + + /* Failed */ + + spin_unlock(&oxu->mem_lock); + + return -ENOMEM; +} + +static void oxu_buf_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd) +{ + int index; + + spin_lock(&oxu->mem_lock); + + index = (qtd->buffer - (void *) &oxu->mem->db_pool[0]) + / BUFFER_SIZE; + oxu->db_used[index] = 0; + qtd->qtd_buffer_len = 0; + qtd->buffer_dma = 0; + qtd->buffer = NULL; + + spin_unlock(&oxu->mem_lock); + + return; +} + +static inline void ehci_qtd_init(struct ehci_qtd *qtd, dma_addr_t dma) +{ + memset(qtd, 0, sizeof *qtd); + qtd->qtd_dma = dma; + qtd->hw_token = cpu_to_le32(QTD_STS_HALT); + qtd->hw_next = EHCI_LIST_END; + qtd->hw_alt_next = EHCI_LIST_END; + INIT_LIST_HEAD(&qtd->qtd_list); +} + +static inline void oxu_qtd_free(struct oxu_hcd *oxu, struct ehci_qtd *qtd) +{ + int index; + + if (qtd->buffer) + oxu_buf_free(oxu, qtd); + + spin_lock(&oxu->mem_lock); + + index = qtd - &oxu->mem->qtd_pool[0]; + oxu->qtd_used[index] = 0; + + spin_unlock(&oxu->mem_lock); + + return; +} + +static struct ehci_qtd *ehci_qtd_alloc(struct oxu_hcd *oxu) +{ + int i; + struct ehci_qtd *qtd = NULL; + + spin_lock(&oxu->mem_lock); + + for (i = 0; i < QTD_NUM; i++) + if (!oxu->qtd_used[i]) + break; + + if (i < QTD_NUM) { + qtd = (struct ehci_qtd *) &oxu->mem->qtd_pool[i]; + memset(qtd, 0, sizeof *qtd); + + qtd->hw_token = cpu_to_le32(QTD_STS_HALT); + qtd->hw_next = EHCI_LIST_END; + qtd->hw_alt_next = EHCI_LIST_END; + INIT_LIST_HEAD(&qtd->qtd_list); + + qtd->qtd_dma = virt_to_phys(qtd); + + oxu->qtd_used[i] = 1; + } + + spin_unlock(&oxu->mem_lock); + + return qtd; +} + +static void oxu_qh_free(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + int index; + + spin_lock(&oxu->mem_lock); + + index = qh - &oxu->mem->qh_pool[0]; + oxu->qh_used[index] = 0; + + spin_unlock(&oxu->mem_lock); + + return; +} + +static void qh_destroy(struct kref *kref) +{ + struct ehci_qh *qh = container_of(kref, struct ehci_qh, kref); + struct oxu_hcd *oxu = qh->oxu; + + /* clean qtds first, and know this is not linked */ + if (!list_empty(&qh->qtd_list) || qh->qh_next.ptr) { + oxu_dbg(oxu, "unused qh not empty!\n"); + BUG(); + } + if (qh->dummy) + oxu_qtd_free(oxu, qh->dummy); + oxu_qh_free(oxu, qh); +} + +static struct ehci_qh *oxu_qh_alloc(struct oxu_hcd *oxu) +{ + int i; + struct ehci_qh *qh = NULL; + + spin_lock(&oxu->mem_lock); + + for (i = 0; i < QHEAD_NUM; i++) + if (!oxu->qh_used[i]) + break; + + if (i < QHEAD_NUM) { + qh = (struct ehci_qh *) &oxu->mem->qh_pool[i]; + memset(qh, 0, sizeof *qh); + + kref_init(&qh->kref); + qh->oxu = oxu; + qh->qh_dma = virt_to_phys(qh); + INIT_LIST_HEAD(&qh->qtd_list); + + /* dummy td enables safe urb queuing */ + qh->dummy = ehci_qtd_alloc(oxu); + if (qh->dummy == NULL) { + oxu_dbg(oxu, "no dummy td\n"); + oxu->qh_used[i] = 0; + + return NULL; + } + + oxu->qh_used[i] = 1; + } + + spin_unlock(&oxu->mem_lock); + + return qh; +} + +/* to share a qh (cpu threads, or hc) */ +static inline struct ehci_qh *qh_get(struct ehci_qh *qh) +{ + kref_get(&qh->kref); + return qh; +} + +static inline void qh_put(struct ehci_qh *qh) +{ + kref_put(&qh->kref, qh_destroy); +} + +static void oxu_murb_free(struct oxu_hcd *oxu, struct oxu_murb *murb) +{ + int index; + + spin_lock(&oxu->mem_lock); + + index = murb - &oxu->murb_pool[0]; + oxu->murb_used[index] = 0; + + spin_unlock(&oxu->mem_lock); + + return; +} + +static struct oxu_murb *oxu_murb_alloc(struct oxu_hcd *oxu) + +{ + int i; + struct oxu_murb *murb = NULL; + + spin_lock(&oxu->mem_lock); + + for (i = 0; i < MURB_NUM; i++) + if (!oxu->murb_used[i]) + break; + + if (i < MURB_NUM) { + murb = &(oxu->murb_pool)[i]; + + oxu->murb_used[i] = 1; + } + + spin_unlock(&oxu->mem_lock); + + return murb; +} + +/* The queue heads and transfer descriptors are managed from pools tied + * to each of the "per device" structures. + * This is the initialisation and cleanup code. + */ +static void ehci_mem_cleanup(struct oxu_hcd *oxu) +{ + kfree(oxu->murb_pool); + oxu->murb_pool = NULL; + + if (oxu->async) + qh_put(oxu->async); + oxu->async = NULL; + + del_timer(&oxu->urb_timer); + + oxu->periodic = NULL; + + /* shadow periodic table */ + kfree(oxu->pshadow); + oxu->pshadow = NULL; +} + +/* Remember to add cleanup code (above) if you add anything here. + */ +static int ehci_mem_init(struct oxu_hcd *oxu, gfp_t flags) +{ + int i; + + for (i = 0; i < oxu->periodic_size; i++) + oxu->mem->frame_list[i] = EHCI_LIST_END; + for (i = 0; i < QHEAD_NUM; i++) + oxu->qh_used[i] = 0; + for (i = 0; i < QTD_NUM; i++) + oxu->qtd_used[i] = 0; + + oxu->murb_pool = kcalloc(MURB_NUM, sizeof(struct oxu_murb), flags); + if (!oxu->murb_pool) + goto fail; + + for (i = 0; i < MURB_NUM; i++) + oxu->murb_used[i] = 0; + + oxu->async = oxu_qh_alloc(oxu); + if (!oxu->async) + goto fail; + + oxu->periodic = (__le32 *) &oxu->mem->frame_list; + oxu->periodic_dma = virt_to_phys(oxu->periodic); + + for (i = 0; i < oxu->periodic_size; i++) + oxu->periodic[i] = EHCI_LIST_END; + + /* software shadow of hardware table */ + oxu->pshadow = kcalloc(oxu->periodic_size, sizeof(void *), flags); + if (oxu->pshadow != NULL) + return 0; + +fail: + oxu_dbg(oxu, "couldn't init memory\n"); + ehci_mem_cleanup(oxu); + return -ENOMEM; +} + +/* Fill a qtd, returning how much of the buffer we were able to queue up. + */ +static int qtd_fill(struct ehci_qtd *qtd, dma_addr_t buf, size_t len, + int token, int maxpacket) +{ + int i, count; + u64 addr = buf; + + /* one buffer entry per 4K ... first might be short or unaligned */ + qtd->hw_buf[0] = cpu_to_le32((u32)addr); + qtd->hw_buf_hi[0] = cpu_to_le32((u32)(addr >> 32)); + count = 0x1000 - (buf & 0x0fff); /* rest of that page */ + if (likely(len < count)) /* ... iff needed */ + count = len; + else { + buf += 0x1000; + buf &= ~0x0fff; + + /* per-qtd limit: from 16K to 20K (best alignment) */ + for (i = 1; count < len && i < 5; i++) { + addr = buf; + qtd->hw_buf[i] = cpu_to_le32((u32)addr); + qtd->hw_buf_hi[i] = cpu_to_le32((u32)(addr >> 32)); + buf += 0x1000; + if ((count + 0x1000) < len) + count += 0x1000; + else + count = len; + } + + /* short packets may only terminate transfers */ + if (count != len) + count -= (count % maxpacket); + } + qtd->hw_token = cpu_to_le32((count << 16) | token); + qtd->length = count; + + return count; +} + +static inline void qh_update(struct oxu_hcd *oxu, + struct ehci_qh *qh, struct ehci_qtd *qtd) +{ + /* writes to an active overlay are unsafe */ + BUG_ON(qh->qh_state != QH_STATE_IDLE); + + qh->hw_qtd_next = QTD_NEXT(qtd->qtd_dma); + qh->hw_alt_next = EHCI_LIST_END; + + /* Except for control endpoints, we make hardware maintain data + * toggle (like OHCI) ... here (re)initialize the toggle in the QH, + * and set the pseudo-toggle in udev. Only usb_clear_halt() will + * ever clear it. + */ + if (!(qh->hw_info1 & cpu_to_le32(1 << 14))) { + unsigned is_out, epnum; + + is_out = !(qtd->hw_token & cpu_to_le32(1 << 8)); + epnum = (le32_to_cpup(&qh->hw_info1) >> 8) & 0x0f; + if (unlikely(!usb_gettoggle(qh->dev, epnum, is_out))) { + qh->hw_token &= ~__constant_cpu_to_le32(QTD_TOGGLE); + usb_settoggle(qh->dev, epnum, is_out, 1); + } + } + + /* HC must see latest qtd and qh data before we clear ACTIVE+HALT */ + wmb(); + qh->hw_token &= __constant_cpu_to_le32(QTD_TOGGLE | QTD_STS_PING); +} + +/* If it weren't for a common silicon quirk (writing the dummy into the qh + * overlay, so qh->hw_token wrongly becomes inactive/halted), only fault + * recovery (including urb dequeue) would need software changes to a QH... + */ +static void qh_refresh(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + struct ehci_qtd *qtd; + + if (list_empty(&qh->qtd_list)) + qtd = qh->dummy; + else { + qtd = list_entry(qh->qtd_list.next, + struct ehci_qtd, qtd_list); + /* first qtd may already be partially processed */ + if (cpu_to_le32(qtd->qtd_dma) == qh->hw_current) + qtd = NULL; + } + + if (qtd) + qh_update(oxu, qh, qtd); +} + +static void qtd_copy_status(struct oxu_hcd *oxu, struct urb *urb, + size_t length, u32 token) +{ + /* count IN/OUT bytes, not SETUP (even short packets) */ + if (likely(QTD_PID(token) != 2)) + urb->actual_length += length - QTD_LENGTH(token); + + /* don't modify error codes */ + if (unlikely(urb->status != -EINPROGRESS)) + return; + + /* force cleanup after short read; not always an error */ + if (unlikely(IS_SHORT_READ(token))) + urb->status = -EREMOTEIO; + + /* serious "can't proceed" faults reported by the hardware */ + if (token & QTD_STS_HALT) { + if (token & QTD_STS_BABBLE) { + /* FIXME "must" disable babbling device's port too */ + urb->status = -EOVERFLOW; + } else if (token & QTD_STS_MMF) { + /* fs/ls interrupt xfer missed the complete-split */ + urb->status = -EPROTO; + } else if (token & QTD_STS_DBE) { + urb->status = (QTD_PID(token) == 1) /* IN ? */ + ? -ENOSR /* hc couldn't read data */ + : -ECOMM; /* hc couldn't write data */ + } else if (token & QTD_STS_XACT) { + /* timeout, bad crc, wrong PID, etc; retried */ + if (QTD_CERR(token)) + urb->status = -EPIPE; + else { + oxu_dbg(oxu, "devpath %s ep%d%s 3strikes\n", + urb->dev->devpath, + usb_pipeendpoint(urb->pipe), + usb_pipein(urb->pipe) ? "in" : "out"); + urb->status = -EPROTO; + } + /* CERR nonzero + no errors + halt --> stall */ + } else if (QTD_CERR(token)) + urb->status = -EPIPE; + else /* unknown */ + urb->status = -EPROTO; + + oxu_vdbg(oxu, "dev%d ep%d%s qtd token %08x --> status %d\n", + usb_pipedevice(urb->pipe), + usb_pipeendpoint(urb->pipe), + usb_pipein(urb->pipe) ? "in" : "out", + token, urb->status); + } +} + +static void ehci_urb_done(struct oxu_hcd *oxu, struct urb *urb) +__releases(oxu->lock) +__acquires(oxu->lock) +{ + if (likely(urb->hcpriv != NULL)) { + struct ehci_qh *qh = (struct ehci_qh *) urb->hcpriv; + + /* S-mask in a QH means it's an interrupt urb */ + if ((qh->hw_info2 & __constant_cpu_to_le32(QH_SMASK)) != 0) { + + /* ... update hc-wide periodic stats (for usbfs) */ + oxu_to_hcd(oxu)->self.bandwidth_int_reqs--; + } + qh_put(qh); + } + + urb->hcpriv = NULL; + switch (urb->status) { + case -EINPROGRESS: /* success */ + urb->status = 0; + default: /* fault */ + break; + case -EREMOTEIO: /* fault or normal */ + if (!(urb->transfer_flags & URB_SHORT_NOT_OK)) + urb->status = 0; + break; + case -ECONNRESET: /* canceled */ + case -ENOENT: + break; + } + +#ifdef OXU_URB_TRACE + oxu_dbg(oxu, "%s %s urb %p ep%d%s status %d len %d/%d\n", + __func__, urb->dev->devpath, urb, + usb_pipeendpoint(urb->pipe), + usb_pipein(urb->pipe) ? "in" : "out", + urb->status, + urb->actual_length, urb->transfer_buffer_length); +#endif + + /* complete() can reenter this HCD */ + spin_unlock(&oxu->lock); + usb_hcd_giveback_urb(oxu_to_hcd(oxu), urb, urb->status); + spin_lock(&oxu->lock); +} + +static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh); +static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh); + +static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh); +static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh); + +#define HALT_BIT __constant_cpu_to_le32(QTD_STS_HALT) + +/* Process and free completed qtds for a qh, returning URBs to drivers. + * Chases up to qh->hw_current. Returns number of completions called, + * indicating how much "real" work we did. + */ +static unsigned qh_completions(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + struct ehci_qtd *last = NULL, *end = qh->dummy; + struct list_head *entry, *tmp; + int stopped; + unsigned count = 0; + int do_status = 0; + u8 state; + struct oxu_murb *murb = NULL; + + if (unlikely(list_empty(&qh->qtd_list))) + return count; + + /* completions (or tasks on other cpus) must never clobber HALT + * till we've gone through and cleaned everything up, even when + * they add urbs to this qh's queue or mark them for unlinking. + * + * NOTE: unlinking expects to be done in queue order. + */ + state = qh->qh_state; + qh->qh_state = QH_STATE_COMPLETING; + stopped = (state == QH_STATE_IDLE); + + /* remove de-activated QTDs from front of queue. + * after faults (including short reads), cleanup this urb + * then let the queue advance. + * if queue is stopped, handles unlinks. + */ + list_for_each_safe(entry, tmp, &qh->qtd_list) { + struct ehci_qtd *qtd; + struct urb *urb; + u32 token = 0; + + qtd = list_entry(entry, struct ehci_qtd, qtd_list); + urb = qtd->urb; + + /* Clean up any state from previous QTD ...*/ + if (last) { + if (likely(last->urb != urb)) { + if (last->urb->complete == NULL) { + murb = (struct oxu_murb *) last->urb; + last->urb = murb->main; + if (murb->last) { + ehci_urb_done(oxu, last->urb); + count++; + } + oxu_murb_free(oxu, murb); + } else { + ehci_urb_done(oxu, last->urb); + count++; + } + } + oxu_qtd_free(oxu, last); + last = NULL; + } + + /* ignore urbs submitted during completions we reported */ + if (qtd == end) + break; + + /* hardware copies qtd out of qh overlay */ + rmb(); + token = le32_to_cpu(qtd->hw_token); + + /* always clean up qtds the hc de-activated */ + if ((token & QTD_STS_ACTIVE) == 0) { + + if ((token & QTD_STS_HALT) != 0) { + stopped = 1; + + /* magic dummy for some short reads; qh won't advance. + * that silicon quirk can kick in with this dummy too. + */ + } else if (IS_SHORT_READ(token) && + !(qtd->hw_alt_next & EHCI_LIST_END)) { + stopped = 1; + goto halt; + } + + /* stop scanning when we reach qtds the hc is using */ + } else if (likely(!stopped && + HC_IS_RUNNING(oxu_to_hcd(oxu)->state))) { + break; + + } else { + stopped = 1; + + if (unlikely(!HC_IS_RUNNING(oxu_to_hcd(oxu)->state))) + urb->status = -ESHUTDOWN; + + /* ignore active urbs unless some previous qtd + * for the urb faulted (including short read) or + * its urb was canceled. we may patch qh or qtds. + */ + if (likely(urb->status == -EINPROGRESS)) + continue; + + /* issue status after short control reads */ + if (unlikely(do_status != 0) + && QTD_PID(token) == 0 /* OUT */) { + do_status = 0; + continue; + } + + /* token in overlay may be most current */ + if (state == QH_STATE_IDLE + && cpu_to_le32(qtd->qtd_dma) + == qh->hw_current) + token = le32_to_cpu(qh->hw_token); + + /* force halt for unlinked or blocked qh, so we'll + * patch the qh later and so that completions can't + * activate it while we "know" it's stopped. + */ + if ((HALT_BIT & qh->hw_token) == 0) { +halt: + qh->hw_token |= HALT_BIT; + wmb(); + } + } + + /* Remove it from the queue */ + qtd_copy_status(oxu, urb->complete ? + urb : ((struct oxu_murb *) urb)->main, + qtd->length, token); + if ((usb_pipein(qtd->urb->pipe)) && + (NULL != qtd->transfer_buffer)) + memcpy(qtd->transfer_buffer, qtd->buffer, qtd->length); + do_status = (urb->status == -EREMOTEIO) + && usb_pipecontrol(urb->pipe); + + if (stopped && qtd->qtd_list.prev != &qh->qtd_list) { + last = list_entry(qtd->qtd_list.prev, + struct ehci_qtd, qtd_list); + last->hw_next = qtd->hw_next; + } + list_del(&qtd->qtd_list); + last = qtd; + } + + /* last urb's completion might still need calling */ + if (likely(last != NULL)) { + if (last->urb->complete == NULL) { + murb = (struct oxu_murb *) last->urb; + last->urb = murb->main; + if (murb->last) { + ehci_urb_done(oxu, last->urb); + count++; + } + oxu_murb_free(oxu, murb); + } else { + ehci_urb_done(oxu, last->urb); + count++; + } + oxu_qtd_free(oxu, last); + } + + /* restore original state; caller must unlink or relink */ + qh->qh_state = state; + + /* be sure the hardware's done with the qh before refreshing + * it after fault cleanup, or recovering from silicon wrongly + * overlaying the dummy qtd (which reduces DMA chatter). + */ + if (stopped != 0 || qh->hw_qtd_next == EHCI_LIST_END) { + switch (state) { + case QH_STATE_IDLE: + qh_refresh(oxu, qh); + break; + case QH_STATE_LINKED: + /* should be rare for periodic transfers, + * except maybe high bandwidth ... + */ + if ((__constant_cpu_to_le32(QH_SMASK) + & qh->hw_info2) != 0) { + intr_deschedule(oxu, qh); + (void) qh_schedule(oxu, qh); + } else + unlink_async(oxu, qh); + break; + /* otherwise, unlink already started */ + } + } + + return count; +} + +/* High bandwidth multiplier, as encoded in highspeed endpoint descriptors */ +#define hb_mult(wMaxPacketSize) (1 + (((wMaxPacketSize) >> 11) & 0x03)) +/* ... and packet size, for any kind of endpoint descriptor */ +#define max_packet(wMaxPacketSize) ((wMaxPacketSize) & 0x07ff) + +/* Reverse of qh_urb_transaction: free a list of TDs. + * used for cleanup after errors, before HC sees an URB's TDs. + */ +static void qtd_list_free(struct oxu_hcd *oxu, + struct urb *urb, struct list_head *qtd_list) +{ + struct list_head *entry, *temp; + + list_for_each_safe(entry, temp, qtd_list) { + struct ehci_qtd *qtd; + + qtd = list_entry(entry, struct ehci_qtd, qtd_list); + list_del(&qtd->qtd_list); + oxu_qtd_free(oxu, qtd); + } +} + +/* Create a list of filled qtds for this URB; won't link into qh. + */ +static struct list_head *qh_urb_transaction(struct oxu_hcd *oxu, + struct urb *urb, + struct list_head *head, + gfp_t flags) +{ + struct ehci_qtd *qtd, *qtd_prev; + dma_addr_t buf; + int len, maxpacket; + int is_input; + u32 token; + void *transfer_buf = NULL; + int ret; + + /* + * URBs map to sequences of QTDs: one logical transaction + */ + qtd = ehci_qtd_alloc(oxu); + if (unlikely(!qtd)) + return NULL; + list_add_tail(&qtd->qtd_list, head); + qtd->urb = urb; + + token = QTD_STS_ACTIVE; + token |= (EHCI_TUNE_CERR << 10); + /* for split transactions, SplitXState initialized to zero */ + + len = urb->transfer_buffer_length; + is_input = usb_pipein(urb->pipe); + if (!urb->transfer_buffer && urb->transfer_buffer_length && is_input) + urb->transfer_buffer = phys_to_virt(urb->transfer_dma); + + if (usb_pipecontrol(urb->pipe)) { + /* SETUP pid */ + ret = oxu_buf_alloc(oxu, qtd, sizeof(struct usb_ctrlrequest)); + if (ret) + goto cleanup; + + qtd_fill(qtd, qtd->buffer_dma, sizeof(struct usb_ctrlrequest), + token | (2 /* "setup" */ << 8), 8); + memcpy(qtd->buffer, qtd->urb->setup_packet, + sizeof(struct usb_ctrlrequest)); + + /* ... and always at least one more pid */ + token ^= QTD_TOGGLE; + qtd_prev = qtd; + qtd = ehci_qtd_alloc(oxu); + if (unlikely(!qtd)) + goto cleanup; + qtd->urb = urb; + qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); + list_add_tail(&qtd->qtd_list, head); + + /* for zero length DATA stages, STATUS is always IN */ + if (len == 0) + token |= (1 /* "in" */ << 8); + } + + /* + * Data transfer stage: buffer setup + */ + + ret = oxu_buf_alloc(oxu, qtd, len); + if (ret) + goto cleanup; + + buf = qtd->buffer_dma; + transfer_buf = urb->transfer_buffer; + + if (!is_input) + memcpy(qtd->buffer, qtd->urb->transfer_buffer, len); + + if (is_input) + token |= (1 /* "in" */ << 8); + /* else it's already initted to "out" pid (0 << 8) */ + + maxpacket = max_packet(usb_maxpacket(urb->dev, urb->pipe, !is_input)); + + /* + * buffer gets wrapped in one or more qtds; + * last one may be "short" (including zero len) + * and may serve as a control status ack + */ + for (;;) { + int this_qtd_len; + + this_qtd_len = qtd_fill(qtd, buf, len, token, maxpacket); + qtd->transfer_buffer = transfer_buf; + len -= this_qtd_len; + buf += this_qtd_len; + transfer_buf += this_qtd_len; + if (is_input) + qtd->hw_alt_next = oxu->async->hw_alt_next; + + /* qh makes control packets use qtd toggle; maybe switch it */ + if ((maxpacket & (this_qtd_len + (maxpacket - 1))) == 0) + token ^= QTD_TOGGLE; + + if (likely(len <= 0)) + break; + + qtd_prev = qtd; + qtd = ehci_qtd_alloc(oxu); + if (unlikely(!qtd)) + goto cleanup; + if (likely(len > 0)) { + ret = oxu_buf_alloc(oxu, qtd, len); + if (ret) + goto cleanup; + } + qtd->urb = urb; + qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); + list_add_tail(&qtd->qtd_list, head); + } + + /* unless the bulk/interrupt caller wants a chance to clean + * up after short reads, hc should advance qh past this urb + */ + if (likely((urb->transfer_flags & URB_SHORT_NOT_OK) == 0 + || usb_pipecontrol(urb->pipe))) + qtd->hw_alt_next = EHCI_LIST_END; + + /* + * control requests may need a terminating data "status" ack; + * bulk ones may need a terminating short packet (zero length). + */ + if (likely(urb->transfer_buffer_length != 0)) { + int one_more = 0; + + if (usb_pipecontrol(urb->pipe)) { + one_more = 1; + token ^= 0x0100; /* "in" <--> "out" */ + token |= QTD_TOGGLE; /* force DATA1 */ + } else if (usb_pipebulk(urb->pipe) + && (urb->transfer_flags & URB_ZERO_PACKET) + && !(urb->transfer_buffer_length % maxpacket)) { + one_more = 1; + } + if (one_more) { + qtd_prev = qtd; + qtd = ehci_qtd_alloc(oxu); + if (unlikely(!qtd)) + goto cleanup; + qtd->urb = urb; + qtd_prev->hw_next = QTD_NEXT(qtd->qtd_dma); + list_add_tail(&qtd->qtd_list, head); + + /* never any data in such packets */ + qtd_fill(qtd, 0, 0, token, 0); + } + } + + /* by default, enable interrupt on urb completion */ + qtd->hw_token |= __constant_cpu_to_le32(QTD_IOC); + return head; + +cleanup: + qtd_list_free(oxu, urb, head); + return NULL; +} + +/* Each QH holds a qtd list; a QH is used for everything except iso. + * + * For interrupt urbs, the scheduler must set the microframe scheduling + * mask(s) each time the QH gets scheduled. For highspeed, that's + * just one microframe in the s-mask. For split interrupt transactions + * there are additional complications: c-mask, maybe FSTNs. + */ +static struct ehci_qh *qh_make(struct oxu_hcd *oxu, + struct urb *urb, gfp_t flags) +{ + struct ehci_qh *qh = oxu_qh_alloc(oxu); + u32 info1 = 0, info2 = 0; + int is_input, type; + int maxp = 0; + + if (!qh) + return qh; + + /* + * init endpoint/device data for this QH + */ + info1 |= usb_pipeendpoint(urb->pipe) << 8; + info1 |= usb_pipedevice(urb->pipe) << 0; + + is_input = usb_pipein(urb->pipe); + type = usb_pipetype(urb->pipe); + maxp = usb_maxpacket(urb->dev, urb->pipe, !is_input); + + /* Compute interrupt scheduling parameters just once, and save. + * - allowing for high bandwidth, how many nsec/uframe are used? + * - split transactions need a second CSPLIT uframe; same question + * - splits also need a schedule gap (for full/low speed I/O) + * - qh has a polling interval + * + * For control/bulk requests, the HC or TT handles these. + */ + if (type == PIPE_INTERRUPT) { + qh->usecs = NS_TO_US(usb_calc_bus_time(USB_SPEED_HIGH, + is_input, 0, + hb_mult(maxp) * max_packet(maxp))); + qh->start = NO_FRAME; + + if (urb->dev->speed == USB_SPEED_HIGH) { + qh->c_usecs = 0; + qh->gap_uf = 0; + + qh->period = urb->interval >> 3; + if (qh->period == 0 && urb->interval != 1) { + /* NOTE interval 2 or 4 uframes could work. + * But interval 1 scheduling is simpler, and + * includes high bandwidth. + */ + dbg("intr period %d uframes, NYET!", + urb->interval); + goto done; + } + } else { + struct usb_tt *tt = urb->dev->tt; + int think_time; + + /* gap is f(FS/LS transfer times) */ + qh->gap_uf = 1 + usb_calc_bus_time(urb->dev->speed, + is_input, 0, maxp) / (125 * 1000); + + /* FIXME this just approximates SPLIT/CSPLIT times */ + if (is_input) { /* SPLIT, gap, CSPLIT+DATA */ + qh->c_usecs = qh->usecs + HS_USECS(0); + qh->usecs = HS_USECS(1); + } else { /* SPLIT+DATA, gap, CSPLIT */ + qh->usecs += HS_USECS(1); + qh->c_usecs = HS_USECS(0); + } + + think_time = tt ? tt->think_time : 0; + qh->tt_usecs = NS_TO_US(think_time + + usb_calc_bus_time(urb->dev->speed, + is_input, 0, max_packet(maxp))); + qh->period = urb->interval; + } + } + + /* support for tt scheduling, and access to toggles */ + qh->dev = urb->dev; + + /* using TT? */ + switch (urb->dev->speed) { + case USB_SPEED_LOW: + info1 |= (1 << 12); /* EPS "low" */ + /* FALL THROUGH */ + + case USB_SPEED_FULL: + /* EPS 0 means "full" */ + if (type != PIPE_INTERRUPT) + info1 |= (EHCI_TUNE_RL_TT << 28); + if (type == PIPE_CONTROL) { + info1 |= (1 << 27); /* for TT */ + info1 |= 1 << 14; /* toggle from qtd */ + } + info1 |= maxp << 16; + + info2 |= (EHCI_TUNE_MULT_TT << 30); + info2 |= urb->dev->ttport << 23; + + /* NOTE: if (PIPE_INTERRUPT) { scheduler sets c-mask } */ + + break; + + case USB_SPEED_HIGH: /* no TT involved */ + info1 |= (2 << 12); /* EPS "high" */ + if (type == PIPE_CONTROL) { + info1 |= (EHCI_TUNE_RL_HS << 28); + info1 |= 64 << 16; /* usb2 fixed maxpacket */ + info1 |= 1 << 14; /* toggle from qtd */ + info2 |= (EHCI_TUNE_MULT_HS << 30); + } else if (type == PIPE_BULK) { + info1 |= (EHCI_TUNE_RL_HS << 28); + info1 |= 512 << 16; /* usb2 fixed maxpacket */ + info2 |= (EHCI_TUNE_MULT_HS << 30); + } else { /* PIPE_INTERRUPT */ + info1 |= max_packet(maxp) << 16; + info2 |= hb_mult(maxp) << 30; + } + break; + default: + dbg("bogus dev %p speed %d", urb->dev, urb->dev->speed); +done: + qh_put(qh); + return NULL; + } + + /* NOTE: if (PIPE_INTERRUPT) { scheduler sets s-mask } */ + + /* init as live, toggle clear, advance to dummy */ + qh->qh_state = QH_STATE_IDLE; + qh->hw_info1 = cpu_to_le32(info1); + qh->hw_info2 = cpu_to_le32(info2); + usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe), !is_input, 1); + qh_refresh(oxu, qh); + return qh; +} + +/* Move qh (and its qtds) onto async queue; maybe enable queue. + */ +static void qh_link_async(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + __le32 dma = QH_NEXT(qh->qh_dma); + struct ehci_qh *head; + + /* (re)start the async schedule? */ + head = oxu->async; + timer_action_done(oxu, TIMER_ASYNC_OFF); + if (!head->qh_next.qh) { + u32 cmd = readl(&oxu->regs->command); + + if (!(cmd & CMD_ASE)) { + /* in case a clear of CMD_ASE didn't take yet */ + (void)handshake(oxu, &oxu->regs->status, + STS_ASS, 0, 150); + cmd |= CMD_ASE | CMD_RUN; + writel(cmd, &oxu->regs->command); + oxu_to_hcd(oxu)->state = HC_STATE_RUNNING; + /* posted write need not be known to HC yet ... */ + } + } + + /* clear halt and/or toggle; and maybe recover from silicon quirk */ + if (qh->qh_state == QH_STATE_IDLE) + qh_refresh(oxu, qh); + + /* splice right after start */ + qh->qh_next = head->qh_next; + qh->hw_next = head->hw_next; + wmb(); + + head->qh_next.qh = qh; + head->hw_next = dma; + + qh->qh_state = QH_STATE_LINKED; + /* qtd completions reported later by interrupt */ +} + +#define QH_ADDR_MASK __constant_cpu_to_le32(0x7f) + +/* + * For control/bulk/interrupt, return QH with these TDs appended. + * Allocates and initializes the QH if necessary. + * Returns null if it can't allocate a QH it needs to. + * If the QH has TDs (urbs) already, that's great. + */ +static struct ehci_qh *qh_append_tds(struct oxu_hcd *oxu, + struct urb *urb, struct list_head *qtd_list, + int epnum, void **ptr) +{ + struct ehci_qh *qh = NULL; + + qh = (struct ehci_qh *) *ptr; + if (unlikely(qh == NULL)) { + /* can't sleep here, we have oxu->lock... */ + qh = qh_make(oxu, urb, GFP_ATOMIC); + *ptr = qh; + } + if (likely(qh != NULL)) { + struct ehci_qtd *qtd; + + if (unlikely(list_empty(qtd_list))) + qtd = NULL; + else + qtd = list_entry(qtd_list->next, struct ehci_qtd, + qtd_list); + + /* control qh may need patching ... */ + if (unlikely(epnum == 0)) { + + /* usb_reset_device() briefly reverts to address 0 */ + if (usb_pipedevice(urb->pipe) == 0) + qh->hw_info1 &= ~QH_ADDR_MASK; + } + + /* just one way to queue requests: swap with the dummy qtd. + * only hc or qh_refresh() ever modify the overlay. + */ + if (likely(qtd != NULL)) { + struct ehci_qtd *dummy; + dma_addr_t dma; + __le32 token; + + /* to avoid racing the HC, use the dummy td instead of + * the first td of our list (becomes new dummy). both + * tds stay deactivated until we're done, when the + * HC is allowed to fetch the old dummy (4.10.2). + */ + token = qtd->hw_token; + qtd->hw_token = HALT_BIT; + wmb(); + dummy = qh->dummy; + + dma = dummy->qtd_dma; + *dummy = *qtd; + dummy->qtd_dma = dma; + + list_del(&qtd->qtd_list); + list_add(&dummy->qtd_list, qtd_list); + list_splice(qtd_list, qh->qtd_list.prev); + + ehci_qtd_init(qtd, qtd->qtd_dma); + qh->dummy = qtd; + + /* hc must see the new dummy at list end */ + dma = qtd->qtd_dma; + qtd = list_entry(qh->qtd_list.prev, + struct ehci_qtd, qtd_list); + qtd->hw_next = QTD_NEXT(dma); + + /* let the hc process these next qtds */ + dummy->hw_token = (token & ~(0x80)); + wmb(); + dummy->hw_token = token; + + urb->hcpriv = qh_get(qh); + } + } + return qh; +} + +static int submit_async(struct oxu_hcd *oxu, struct urb *urb, + struct list_head *qtd_list, gfp_t mem_flags) +{ + struct ehci_qtd *qtd; + int epnum; + unsigned long flags; + struct ehci_qh *qh = NULL; + int rc = 0; + + qtd = list_entry(qtd_list->next, struct ehci_qtd, qtd_list); + epnum = urb->ep->desc.bEndpointAddress; + +#ifdef OXU_URB_TRACE + oxu_dbg(oxu, "%s %s urb %p ep%d%s len %d, qtd %p [qh %p]\n", + __func__, urb->dev->devpath, urb, + epnum & 0x0f, (epnum & USB_DIR_IN) ? "in" : "out", + urb->transfer_buffer_length, + qtd, urb->ep->hcpriv); +#endif + + spin_lock_irqsave(&oxu->lock, flags); + if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, + &oxu_to_hcd(oxu)->flags))) { + rc = -ESHUTDOWN; + goto done; + } + + qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv); + if (unlikely(qh == NULL)) { + rc = -ENOMEM; + goto done; + } + + /* Control/bulk operations through TTs don't need scheduling, + * the HC and TT handle it when the TT has a buffer ready. + */ + if (likely(qh->qh_state == QH_STATE_IDLE)) + qh_link_async(oxu, qh_get(qh)); +done: + spin_unlock_irqrestore(&oxu->lock, flags); + if (unlikely(qh == NULL)) + qtd_list_free(oxu, urb, qtd_list); + return rc; +} + +/* The async qh for the qtds being reclaimed are now unlinked from the HC */ + +static void end_unlink_async(struct oxu_hcd *oxu) +{ + struct ehci_qh *qh = oxu->reclaim; + struct ehci_qh *next; + + timer_action_done(oxu, TIMER_IAA_WATCHDOG); + + qh->qh_state = QH_STATE_IDLE; + qh->qh_next.qh = NULL; + qh_put(qh); /* refcount from reclaim */ + + /* other unlink(s) may be pending (in QH_STATE_UNLINK_WAIT) */ + next = qh->reclaim; + oxu->reclaim = next; + oxu->reclaim_ready = 0; + qh->reclaim = NULL; + + qh_completions(oxu, qh); + + if (!list_empty(&qh->qtd_list) + && HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) + qh_link_async(oxu, qh); + else { + qh_put(qh); /* refcount from async list */ + + /* it's not free to turn the async schedule on/off; leave it + * active but idle for a while once it empties. + */ + if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state) + && oxu->async->qh_next.qh == NULL) + timer_action(oxu, TIMER_ASYNC_OFF); + } + + if (next) { + oxu->reclaim = NULL; + start_unlink_async(oxu, next); + } +} + +/* makes sure the async qh will become idle */ +/* caller must own oxu->lock */ + +static void start_unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + int cmd = readl(&oxu->regs->command); + struct ehci_qh *prev; + +#ifdef DEBUG + assert_spin_locked(&oxu->lock); + if (oxu->reclaim || (qh->qh_state != QH_STATE_LINKED + && qh->qh_state != QH_STATE_UNLINK_WAIT)) + BUG(); +#endif + + /* stop async schedule right now? */ + if (unlikely(qh == oxu->async)) { + /* can't get here without STS_ASS set */ + if (oxu_to_hcd(oxu)->state != HC_STATE_HALT + && !oxu->reclaim) { + /* ... and CMD_IAAD clear */ + writel(cmd & ~CMD_ASE, &oxu->regs->command); + wmb(); + /* handshake later, if we need to */ + timer_action_done(oxu, TIMER_ASYNC_OFF); + } + return; + } + + qh->qh_state = QH_STATE_UNLINK; + oxu->reclaim = qh = qh_get(qh); + + prev = oxu->async; + while (prev->qh_next.qh != qh) + prev = prev->qh_next.qh; + + prev->hw_next = qh->hw_next; + prev->qh_next = qh->qh_next; + wmb(); + + if (unlikely(oxu_to_hcd(oxu)->state == HC_STATE_HALT)) { + /* if (unlikely(qh->reclaim != 0)) + * this will recurse, probably not much + */ + end_unlink_async(oxu); + return; + } + + oxu->reclaim_ready = 0; + cmd |= CMD_IAAD; + writel(cmd, &oxu->regs->command); + (void) readl(&oxu->regs->command); + timer_action(oxu, TIMER_IAA_WATCHDOG); +} + +static void scan_async(struct oxu_hcd *oxu) +{ + struct ehci_qh *qh; + enum ehci_timer_action action = TIMER_IO_WATCHDOG; + + if (!++(oxu->stamp)) + oxu->stamp++; + timer_action_done(oxu, TIMER_ASYNC_SHRINK); +rescan: + qh = oxu->async->qh_next.qh; + if (likely(qh != NULL)) { + do { + /* clean any finished work for this qh */ + if (!list_empty(&qh->qtd_list) + && qh->stamp != oxu->stamp) { + int temp; + + /* unlinks could happen here; completion + * reporting drops the lock. rescan using + * the latest schedule, but don't rescan + * qhs we already finished (no looping). + */ + qh = qh_get(qh); + qh->stamp = oxu->stamp; + temp = qh_completions(oxu, qh); + qh_put(qh); + if (temp != 0) + goto rescan; + } + + /* unlink idle entries, reducing HC PCI usage as well + * as HCD schedule-scanning costs. delay for any qh + * we just scanned, there's a not-unusual case that it + * doesn't stay idle for long. + * (plus, avoids some kind of re-activation race.) + */ + if (list_empty(&qh->qtd_list)) { + if (qh->stamp == oxu->stamp) + action = TIMER_ASYNC_SHRINK; + else if (!oxu->reclaim + && qh->qh_state == QH_STATE_LINKED) + start_unlink_async(oxu, qh); + } + + qh = qh->qh_next.qh; + } while (qh); + } + if (action == TIMER_ASYNC_SHRINK) + timer_action(oxu, TIMER_ASYNC_SHRINK); +} + +/* + * periodic_next_shadow - return "next" pointer on shadow list + * @periodic: host pointer to qh/itd/sitd + * @tag: hardware tag for type of this record + */ +static union ehci_shadow *periodic_next_shadow(union ehci_shadow *periodic, + __le32 tag) +{ + switch (tag) { + default: + case Q_TYPE_QH: + return &periodic->qh->qh_next; + } +} + +/* caller must hold oxu->lock */ +static void periodic_unlink(struct oxu_hcd *oxu, unsigned frame, void *ptr) +{ + union ehci_shadow *prev_p = &oxu->pshadow[frame]; + __le32 *hw_p = &oxu->periodic[frame]; + union ehci_shadow here = *prev_p; + + /* find predecessor of "ptr"; hw and shadow lists are in sync */ + while (here.ptr && here.ptr != ptr) { + prev_p = periodic_next_shadow(prev_p, Q_NEXT_TYPE(*hw_p)); + hw_p = here.hw_next; + here = *prev_p; + } + /* an interrupt entry (at list end) could have been shared */ + if (!here.ptr) + return; + + /* update shadow and hardware lists ... the old "next" pointers + * from ptr may still be in use, the caller updates them. + */ + *prev_p = *periodic_next_shadow(&here, Q_NEXT_TYPE(*hw_p)); + *hw_p = *here.hw_next; +} + +/* how many of the uframe's 125 usecs are allocated? */ +static unsigned short periodic_usecs(struct oxu_hcd *oxu, + unsigned frame, unsigned uframe) +{ + __le32 *hw_p = &oxu->periodic[frame]; + union ehci_shadow *q = &oxu->pshadow[frame]; + unsigned usecs = 0; + + while (q->ptr) { + switch (Q_NEXT_TYPE(*hw_p)) { + case Q_TYPE_QH: + default: + /* is it in the S-mask? */ + if (q->qh->hw_info2 & cpu_to_le32(1 << uframe)) + usecs += q->qh->usecs; + /* ... or C-mask? */ + if (q->qh->hw_info2 & cpu_to_le32(1 << (8 + uframe))) + usecs += q->qh->c_usecs; + hw_p = &q->qh->hw_next; + q = &q->qh->qh_next; + break; + } + } +#ifdef DEBUG + if (usecs > 100) + oxu_err(oxu, "uframe %d sched overrun: %d usecs\n", + frame * 8 + uframe, usecs); +#endif + return usecs; +} + +static int enable_periodic(struct oxu_hcd *oxu) +{ + u32 cmd; + int status; + + /* did clearing PSE did take effect yet? + * takes effect only at frame boundaries... + */ + status = handshake(oxu, &oxu->regs->status, STS_PSS, 0, 9 * 125); + if (status != 0) { + oxu_to_hcd(oxu)->state = HC_STATE_HALT; + return status; + } + + cmd = readl(&oxu->regs->command) | CMD_PSE; + writel(cmd, &oxu->regs->command); + /* posted write ... PSS happens later */ + oxu_to_hcd(oxu)->state = HC_STATE_RUNNING; + + /* make sure ehci_work scans these */ + oxu->next_uframe = readl(&oxu->regs->frame_index) + % (oxu->periodic_size << 3); + return 0; +} + +static int disable_periodic(struct oxu_hcd *oxu) +{ + u32 cmd; + int status; + + /* did setting PSE not take effect yet? + * takes effect only at frame boundaries... + */ + status = handshake(oxu, &oxu->regs->status, STS_PSS, STS_PSS, 9 * 125); + if (status != 0) { + oxu_to_hcd(oxu)->state = HC_STATE_HALT; + return status; + } + + cmd = readl(&oxu->regs->command) & ~CMD_PSE; + writel(cmd, &oxu->regs->command); + /* posted write ... */ + + oxu->next_uframe = -1; + return 0; +} + +/* periodic schedule slots have iso tds (normal or split) first, then a + * sparse tree for active interrupt transfers. + * + * this just links in a qh; caller guarantees uframe masks are set right. + * no FSTN support (yet; oxu 0.96+) + */ +static int qh_link_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + unsigned i; + unsigned period = qh->period; + + dev_dbg(&qh->dev->dev, + "link qh%d-%04x/%p start %d [%d/%d us]\n", + period, le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK), + qh, qh->start, qh->usecs, qh->c_usecs); + + /* high bandwidth, or otherwise every microframe */ + if (period == 0) + period = 1; + + for (i = qh->start; i < oxu->periodic_size; i += period) { + union ehci_shadow *prev = &oxu->pshadow[i]; + __le32 *hw_p = &oxu->periodic[i]; + union ehci_shadow here = *prev; + __le32 type = 0; + + /* skip the iso nodes at list head */ + while (here.ptr) { + type = Q_NEXT_TYPE(*hw_p); + if (type == Q_TYPE_QH) + break; + prev = periodic_next_shadow(prev, type); + hw_p = &here.qh->hw_next; + here = *prev; + } + + /* sorting each branch by period (slow-->fast) + * enables sharing interior tree nodes + */ + while (here.ptr && qh != here.qh) { + if (qh->period > here.qh->period) + break; + prev = &here.qh->qh_next; + hw_p = &here.qh->hw_next; + here = *prev; + } + /* link in this qh, unless some earlier pass did that */ + if (qh != here.qh) { + qh->qh_next = here; + if (here.qh) + qh->hw_next = *hw_p; + wmb(); + prev->qh = qh; + *hw_p = QH_NEXT(qh->qh_dma); + } + } + qh->qh_state = QH_STATE_LINKED; + qh_get(qh); + + /* update per-qh bandwidth for usbfs */ + oxu_to_hcd(oxu)->self.bandwidth_allocated += qh->period + ? ((qh->usecs + qh->c_usecs) / qh->period) + : (qh->usecs * 8); + + /* maybe enable periodic schedule processing */ + if (!oxu->periodic_sched++) + return enable_periodic(oxu); + + return 0; +} + +static void qh_unlink_periodic(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + unsigned i; + unsigned period; + + /* FIXME: + * IF this isn't high speed + * and this qh is active in the current uframe + * (and overlay token SplitXstate is false?) + * THEN + * qh->hw_info1 |= __constant_cpu_to_le32(1 << 7 "ignore"); + */ + + /* high bandwidth, or otherwise part of every microframe */ + period = qh->period; + if (period == 0) + period = 1; + + for (i = qh->start; i < oxu->periodic_size; i += period) + periodic_unlink(oxu, i, qh); + + /* update per-qh bandwidth for usbfs */ + oxu_to_hcd(oxu)->self.bandwidth_allocated -= qh->period + ? ((qh->usecs + qh->c_usecs) / qh->period) + : (qh->usecs * 8); + + dev_dbg(&qh->dev->dev, + "unlink qh%d-%04x/%p start %d [%d/%d us]\n", + qh->period, + le32_to_cpup(&qh->hw_info2) & (QH_CMASK | QH_SMASK), + qh, qh->start, qh->usecs, qh->c_usecs); + + /* qh->qh_next still "live" to HC */ + qh->qh_state = QH_STATE_UNLINK; + qh->qh_next.ptr = NULL; + qh_put(qh); + + /* maybe turn off periodic schedule */ + oxu->periodic_sched--; + if (!oxu->periodic_sched) + (void) disable_periodic(oxu); +} + +static void intr_deschedule(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + unsigned wait; + + qh_unlink_periodic(oxu, qh); + + /* simple/paranoid: always delay, expecting the HC needs to read + * qh->hw_next or finish a writeback after SPLIT/CSPLIT ... and + * expect khubd to clean up after any CSPLITs we won't issue. + * active high speed queues may need bigger delays... + */ + if (list_empty(&qh->qtd_list) + || (__constant_cpu_to_le32(QH_CMASK) & qh->hw_info2) != 0) + wait = 2; + else + wait = 55; /* worst case: 3 * 1024 */ + + udelay(wait); + qh->qh_state = QH_STATE_IDLE; + qh->hw_next = EHCI_LIST_END; + wmb(); +} + +static int check_period(struct oxu_hcd *oxu, + unsigned frame, unsigned uframe, + unsigned period, unsigned usecs) +{ + int claimed; + + /* complete split running into next frame? + * given FSTN support, we could sometimes check... + */ + if (uframe >= 8) + return 0; + + /* + * 80% periodic == 100 usec/uframe available + * convert "usecs we need" to "max already claimed" + */ + usecs = 100 - usecs; + + /* we "know" 2 and 4 uframe intervals were rejected; so + * for period 0, check _every_ microframe in the schedule. + */ + if (unlikely(period == 0)) { + do { + for (uframe = 0; uframe < 7; uframe++) { + claimed = periodic_usecs(oxu, frame, uframe); + if (claimed > usecs) + return 0; + } + } while ((frame += 1) < oxu->periodic_size); + + /* just check the specified uframe, at that period */ + } else { + do { + claimed = periodic_usecs(oxu, frame, uframe); + if (claimed > usecs) + return 0; + } while ((frame += period) < oxu->periodic_size); + } + + return 1; +} + +static int check_intr_schedule(struct oxu_hcd *oxu, + unsigned frame, unsigned uframe, + const struct ehci_qh *qh, __le32 *c_maskp) +{ + int retval = -ENOSPC; + + if (qh->c_usecs && uframe >= 6) /* FSTN territory? */ + goto done; + + if (!check_period(oxu, frame, uframe, qh->period, qh->usecs)) + goto done; + if (!qh->c_usecs) { + retval = 0; + *c_maskp = 0; + goto done; + } + +done: + return retval; +} + +/* "first fit" scheduling policy used the first time through, + * or when the previous schedule slot can't be re-used. + */ +static int qh_schedule(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + int status; + unsigned uframe; + __le32 c_mask; + unsigned frame; /* 0..(qh->period - 1), or NO_FRAME */ + + qh_refresh(oxu, qh); + qh->hw_next = EHCI_LIST_END; + frame = qh->start; + + /* reuse the previous schedule slots, if we can */ + if (frame < qh->period) { + uframe = ffs(le32_to_cpup(&qh->hw_info2) & QH_SMASK); + status = check_intr_schedule(oxu, frame, --uframe, + qh, &c_mask); + } else { + uframe = 0; + c_mask = 0; + status = -ENOSPC; + } + + /* else scan the schedule to find a group of slots such that all + * uframes have enough periodic bandwidth available. + */ + if (status) { + /* "normal" case, uframing flexible except with splits */ + if (qh->period) { + frame = qh->period - 1; + do { + for (uframe = 0; uframe < 8; uframe++) { + status = check_intr_schedule(oxu, + frame, uframe, qh, + &c_mask); + if (status == 0) + break; + } + } while (status && frame--); + + /* qh->period == 0 means every uframe */ + } else { + frame = 0; + status = check_intr_schedule(oxu, 0, 0, qh, &c_mask); + } + if (status) + goto done; + qh->start = frame; + + /* reset S-frame and (maybe) C-frame masks */ + qh->hw_info2 &= __constant_cpu_to_le32(~(QH_CMASK | QH_SMASK)); + qh->hw_info2 |= qh->period + ? cpu_to_le32(1 << uframe) + : __constant_cpu_to_le32(QH_SMASK); + qh->hw_info2 |= c_mask; + } else + oxu_dbg(oxu, "reused qh %p schedule\n", qh); + + /* stuff into the periodic schedule */ + status = qh_link_periodic(oxu, qh); +done: + return status; +} + +static int intr_submit(struct oxu_hcd *oxu, struct urb *urb, + struct list_head *qtd_list, gfp_t mem_flags) +{ + unsigned epnum; + unsigned long flags; + struct ehci_qh *qh; + int status = 0; + struct list_head empty; + + /* get endpoint and transfer/schedule data */ + epnum = urb->ep->desc.bEndpointAddress; + + spin_lock_irqsave(&oxu->lock, flags); + + if (unlikely(!test_bit(HCD_FLAG_HW_ACCESSIBLE, + &oxu_to_hcd(oxu)->flags))) { + status = -ESHUTDOWN; + goto done; + } + + /* get qh and force any scheduling errors */ + INIT_LIST_HEAD(&empty); + qh = qh_append_tds(oxu, urb, &empty, epnum, &urb->ep->hcpriv); + if (qh == NULL) { + status = -ENOMEM; + goto done; + } + if (qh->qh_state == QH_STATE_IDLE) { + status = qh_schedule(oxu, qh); + if (status != 0) + goto done; + } + + /* then queue the urb's tds to the qh */ + qh = qh_append_tds(oxu, urb, qtd_list, epnum, &urb->ep->hcpriv); + BUG_ON(qh == NULL); + + /* ... update usbfs periodic stats */ + oxu_to_hcd(oxu)->self.bandwidth_int_reqs++; + +done: + spin_unlock_irqrestore(&oxu->lock, flags); + if (status) + qtd_list_free(oxu, urb, qtd_list); + + return status; +} + +static inline int itd_submit(struct oxu_hcd *oxu, struct urb *urb, + gfp_t mem_flags) +{ + oxu_dbg(oxu, "iso support is missing!\n"); + return -ENOSYS; +} + +static inline int sitd_submit(struct oxu_hcd *oxu, struct urb *urb, + gfp_t mem_flags) +{ + oxu_dbg(oxu, "split iso support is missing!\n"); + return -ENOSYS; +} + +static void scan_periodic(struct oxu_hcd *oxu) +{ + unsigned frame, clock, now_uframe, mod; + unsigned modified; + + mod = oxu->periodic_size << 3; + + /* + * When running, scan from last scan point up to "now" + * else clean up by scanning everything that's left. + * Touches as few pages as possible: cache-friendly. + */ + now_uframe = oxu->next_uframe; + if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) + clock = readl(&oxu->regs->frame_index); + else + clock = now_uframe + mod - 1; + clock %= mod; + + for (;;) { + union ehci_shadow q, *q_p; + __le32 type, *hw_p; + unsigned uframes; + + /* don't scan past the live uframe */ + frame = now_uframe >> 3; + if (frame == (clock >> 3)) + uframes = now_uframe & 0x07; + else { + /* safe to scan the whole frame at once */ + now_uframe |= 0x07; + uframes = 8; + } + +restart: + /* scan each element in frame's queue for completions */ + q_p = &oxu->pshadow[frame]; + hw_p = &oxu->periodic[frame]; + q.ptr = q_p->ptr; + type = Q_NEXT_TYPE(*hw_p); + modified = 0; + + while (q.ptr != NULL) { + union ehci_shadow temp; + int live; + + live = HC_IS_RUNNING(oxu_to_hcd(oxu)->state); + switch (type) { + case Q_TYPE_QH: + /* handle any completions */ + temp.qh = qh_get(q.qh); + type = Q_NEXT_TYPE(q.qh->hw_next); + q = q.qh->qh_next; + modified = qh_completions(oxu, temp.qh); + if (unlikely(list_empty(&temp.qh->qtd_list))) + intr_deschedule(oxu, temp.qh); + qh_put(temp.qh); + break; + default: + dbg("corrupt type %d frame %d shadow %p", + type, frame, q.ptr); + q.ptr = NULL; + } + + /* assume completion callbacks modify the queue */ + if (unlikely(modified)) + goto restart; + } + + /* Stop when we catch up to the HC */ + + /* FIXME: this assumes we won't get lapped when + * latencies climb; that should be rare, but... + * detect it, and just go all the way around. + * FLR might help detect this case, so long as latencies + * don't exceed periodic_size msec (default 1.024 sec). + */ + + /* FIXME: likewise assumes HC doesn't halt mid-scan */ + + if (now_uframe == clock) { + unsigned now; + + if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) + break; + oxu->next_uframe = now_uframe; + now = readl(&oxu->regs->frame_index) % mod; + if (now_uframe == now) + break; + + /* rescan the rest of this frame, then ... */ + clock = now; + } else { + now_uframe++; + now_uframe %= mod; + } + } +} + +/* On some systems, leaving remote wakeup enabled prevents system shutdown. + * The firmware seems to think that powering off is a wakeup event! + * This routine turns off remote wakeup and everything else, on all ports. + */ +static void ehci_turn_off_all_ports(struct oxu_hcd *oxu) +{ + int port = HCS_N_PORTS(oxu->hcs_params); + + while (port--) + writel(PORT_RWC_BITS, &oxu->regs->port_status[port]); +} + +static void ehci_port_power(struct oxu_hcd *oxu, int is_on) +{ + unsigned port; + + if (!HCS_PPC(oxu->hcs_params)) + return; + + oxu_dbg(oxu, "...power%s ports...\n", is_on ? "up" : "down"); + for (port = HCS_N_PORTS(oxu->hcs_params); port > 0; ) + (void) oxu_hub_control(oxu_to_hcd(oxu), + is_on ? SetPortFeature : ClearPortFeature, + USB_PORT_FEAT_POWER, + port--, NULL, 0); + msleep(20); +} + +/* Called from some interrupts, timers, and so on. + * It calls driver completion functions, after dropping oxu->lock. + */ +static void ehci_work(struct oxu_hcd *oxu) +{ + timer_action_done(oxu, TIMER_IO_WATCHDOG); + if (oxu->reclaim_ready) + end_unlink_async(oxu); + + /* another CPU may drop oxu->lock during a schedule scan while + * it reports urb completions. this flag guards against bogus + * attempts at re-entrant schedule scanning. + */ + if (oxu->scanning) + return; + oxu->scanning = 1; + scan_async(oxu); + if (oxu->next_uframe != -1) + scan_periodic(oxu); + oxu->scanning = 0; + + /* the IO watchdog guards against hardware or driver bugs that + * misplace IRQs, and should let us run completely without IRQs. + * such lossage has been observed on both VT6202 and VT8235. + */ + if (HC_IS_RUNNING(oxu_to_hcd(oxu)->state) && + (oxu->async->qh_next.ptr != NULL || + oxu->periodic_sched != 0)) + timer_action(oxu, TIMER_IO_WATCHDOG); +} + +static void unlink_async(struct oxu_hcd *oxu, struct ehci_qh *qh) +{ + /* if we need to use IAA and it's busy, defer */ + if (qh->qh_state == QH_STATE_LINKED + && oxu->reclaim + && HC_IS_RUNNING(oxu_to_hcd(oxu)->state)) { + struct ehci_qh *last; + + for (last = oxu->reclaim; + last->reclaim; + last = last->reclaim) + continue; + qh->qh_state = QH_STATE_UNLINK_WAIT; + last->reclaim = qh; + + /* bypass IAA if the hc can't care */ + } else if (!HC_IS_RUNNING(oxu_to_hcd(oxu)->state) && oxu->reclaim) + end_unlink_async(oxu); + + /* something else might have unlinked the qh by now */ + if (qh->qh_state == QH_STATE_LINKED) + start_unlink_async(oxu, qh); +} + +/* + * USB host controller methods + */ + +static irqreturn_t oxu210_hcd_irq(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + u32 status, pcd_status = 0; + int bh; + + spin_lock(&oxu->lock); + + status = readl(&oxu->regs->status); + + /* e.g. cardbus physical eject */ + if (status == ~(u32) 0) { + oxu_dbg(oxu, "device removed\n"); + goto dead; + } + + status &= INTR_MASK; + if (!status) { /* irq sharing? */ + spin_unlock(&oxu->lock); + return IRQ_NONE; + } + + /* clear (just) interrupts */ + writel(status, &oxu->regs->status); + readl(&oxu->regs->command); /* unblock posted write */ + bh = 0; + +#ifdef OXU_VERBOSE_DEBUG + /* unrequested/ignored: Frame List Rollover */ + dbg_status(oxu, "irq", status); +#endif + + /* INT, ERR, and IAA interrupt rates can be throttled */ + + /* normal [4.15.1.2] or error [4.15.1.1] completion */ + if (likely((status & (STS_INT|STS_ERR)) != 0)) + bh = 1; + + /* complete the unlinking of some qh [4.15.2.3] */ + if (status & STS_IAA) { + oxu->reclaim_ready = 1; + bh = 1; + } + + /* remote wakeup [4.3.1] */ + if (status & STS_PCD) { + unsigned i = HCS_N_PORTS(oxu->hcs_params); + pcd_status = status; + + /* resume root hub? */ + if (!(readl(&oxu->regs->command) & CMD_RUN)) + usb_hcd_resume_root_hub(hcd); + + while (i--) { + int pstatus = readl(&oxu->regs->port_status[i]); + + if (pstatus & PORT_OWNER) + continue; + if (!(pstatus & PORT_RESUME) + || oxu->reset_done[i] != 0) + continue; + + /* start 20 msec resume signaling from this port, + * and make khubd collect PORT_STAT_C_SUSPEND to + * stop that signaling. + */ + oxu->reset_done[i] = jiffies + msecs_to_jiffies(20); + oxu_dbg(oxu, "port %d remote wakeup\n", i + 1); + mod_timer(&hcd->rh_timer, oxu->reset_done[i]); + } + } + + /* PCI errors [4.15.2.4] */ + if (unlikely((status & STS_FATAL) != 0)) { + /* bogus "fatal" IRQs appear on some chips... why? */ + status = readl(&oxu->regs->status); + dbg_cmd(oxu, "fatal", readl(&oxu->regs->command)); + dbg_status(oxu, "fatal", status); + if (status & STS_HALT) { + oxu_err(oxu, "fatal error\n"); +dead: + ehci_reset(oxu); + writel(0, &oxu->regs->configured_flag); + /* generic layer kills/unlinks all urbs, then + * uses oxu_stop to clean up the rest + */ + bh = 1; + } + } + + if (bh) + ehci_work(oxu); + spin_unlock(&oxu->lock); + if (pcd_status & STS_PCD) + usb_hcd_poll_rh_status(hcd); + return IRQ_HANDLED; +} + +static irqreturn_t oxu_irq(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int ret = IRQ_HANDLED; + + u32 status = oxu_readl(hcd->regs, OXU_CHIPIRQSTATUS); + u32 enable = oxu_readl(hcd->regs, OXU_CHIPIRQEN_SET); + + /* Disable all interrupt */ + oxu_writel(hcd->regs, OXU_CHIPIRQEN_CLR, enable); + + if ((oxu->is_otg && (status & OXU_USBOTGI)) || + (!oxu->is_otg && (status & OXU_USBSPHI))) + oxu210_hcd_irq(hcd); + else + ret = IRQ_NONE; + + /* Enable all interrupt back */ + oxu_writel(hcd->regs, OXU_CHIPIRQEN_SET, enable); + + return ret; +} + +static void oxu_watchdog(unsigned long param) +{ + struct oxu_hcd *oxu = (struct oxu_hcd *) param; + unsigned long flags; + + spin_lock_irqsave(&oxu->lock, flags); + + /* lost IAA irqs wedge things badly; seen with a vt8235 */ + if (oxu->reclaim) { + u32 status = readl(&oxu->regs->status); + if (status & STS_IAA) { + oxu_vdbg(oxu, "lost IAA\n"); + writel(STS_IAA, &oxu->regs->status); + oxu->reclaim_ready = 1; + } + } + + /* stop async processing after it's idled a bit */ + if (test_bit(TIMER_ASYNC_OFF, &oxu->actions)) + start_unlink_async(oxu, oxu->async); + + /* oxu could run by timer, without IRQs ... */ + ehci_work(oxu); + + spin_unlock_irqrestore(&oxu->lock, flags); +} + +/* One-time init, only for memory state. + */ +static int oxu_hcd_init(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + u32 temp; + int retval; + u32 hcc_params; + + spin_lock_init(&oxu->lock); + + init_timer(&oxu->watchdog); + oxu->watchdog.function = oxu_watchdog; + oxu->watchdog.data = (unsigned long) oxu; + + /* + * hw default: 1K periodic list heads, one per frame. + * periodic_size can shrink by USBCMD update if hcc_params allows. + */ + oxu->periodic_size = DEFAULT_I_TDPS; + retval = ehci_mem_init(oxu, GFP_KERNEL); + if (retval < 0) + return retval; + + /* controllers may cache some of the periodic schedule ... */ + hcc_params = readl(&oxu->caps->hcc_params); + if (HCC_ISOC_CACHE(hcc_params)) /* full frame cache */ + oxu->i_thresh = 8; + else /* N microframes cached */ + oxu->i_thresh = 2 + HCC_ISOC_THRES(hcc_params); + + oxu->reclaim = NULL; + oxu->reclaim_ready = 0; + oxu->next_uframe = -1; + + /* + * dedicate a qh for the async ring head, since we couldn't unlink + * a 'real' qh without stopping the async schedule [4.8]. use it + * as the 'reclamation list head' too. + * its dummy is used in hw_alt_next of many tds, to prevent the qh + * from automatically advancing to the next td after short reads. + */ + oxu->async->qh_next.qh = NULL; + oxu->async->hw_next = QH_NEXT(oxu->async->qh_dma); + oxu->async->hw_info1 = cpu_to_le32(QH_HEAD); + oxu->async->hw_token = cpu_to_le32(QTD_STS_HALT); + oxu->async->hw_qtd_next = EHCI_LIST_END; + oxu->async->qh_state = QH_STATE_LINKED; + oxu->async->hw_alt_next = QTD_NEXT(oxu->async->dummy->qtd_dma); + + /* clear interrupt enables, set irq latency */ + if (log2_irq_thresh < 0 || log2_irq_thresh > 6) + log2_irq_thresh = 0; + temp = 1 << (16 + log2_irq_thresh); + if (HCC_CANPARK(hcc_params)) { + /* HW default park == 3, on hardware that supports it (like + * NVidia and ALI silicon), maximizes throughput on the async + * schedule by avoiding QH fetches between transfers. + * + * With fast usb storage devices and NForce2, "park" seems to + * make problems: throughput reduction (!), data errors... + */ + if (park) { + park = min(park, (unsigned) 3); + temp |= CMD_PARK; + temp |= park << 8; + } + oxu_dbg(oxu, "park %d\n", park); + } + if (HCC_PGM_FRAMELISTLEN(hcc_params)) { + /* periodic schedule size can be smaller than default */ + temp &= ~(3 << 2); + temp |= (EHCI_TUNE_FLS << 2); + } + oxu->command = temp; + + return 0; +} + +/* Called during probe() after chip reset completes. + */ +static int oxu_reset(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int ret; + + spin_lock_init(&oxu->mem_lock); + INIT_LIST_HEAD(&oxu->urb_list); + oxu->urb_len = 0; + + /* FIMXE */ + hcd->self.controller->dma_mask = 0UL; + + if (oxu->is_otg) { + oxu->caps = hcd->regs + OXU_OTG_CAP_OFFSET; + oxu->regs = hcd->regs + OXU_OTG_CAP_OFFSET + \ + HC_LENGTH(readl(&oxu->caps->hc_capbase)); + + oxu->mem = hcd->regs + OXU_SPH_MEM; + } else { + oxu->caps = hcd->regs + OXU_SPH_CAP_OFFSET; + oxu->regs = hcd->regs + OXU_SPH_CAP_OFFSET + \ + HC_LENGTH(readl(&oxu->caps->hc_capbase)); + + oxu->mem = hcd->regs + OXU_OTG_MEM; + } + + oxu->hcs_params = readl(&oxu->caps->hcs_params); + oxu->sbrn = 0x20; + + ret = oxu_hcd_init(hcd); + if (ret) + return ret; + + return 0; +} + +static int oxu_run(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int retval; + u32 temp, hcc_params; + + hcd->uses_new_polling = 1; + hcd->poll_rh = 0; + + /* EHCI spec section 4.1 */ + retval = ehci_reset(oxu); + if (retval != 0) { + ehci_mem_cleanup(oxu); + return retval; + } + writel(oxu->periodic_dma, &oxu->regs->frame_list); + writel((u32) oxu->async->qh_dma, &oxu->regs->async_next); + + /* hcc_params controls whether oxu->regs->segment must (!!!) + * be used; it constrains QH/ITD/SITD and QTD locations. + * pci_pool consistent memory always uses segment zero. + * streaming mappings for I/O buffers, like pci_map_single(), + * can return segments above 4GB, if the device allows. + * + * NOTE: the dma mask is visible through dma_supported(), so + * drivers can pass this info along ... like NETIF_F_HIGHDMA, + * Scsi_Host.highmem_io, and so forth. It's readonly to all + * host side drivers though. + */ + hcc_params = readl(&oxu->caps->hcc_params); + if (HCC_64BIT_ADDR(hcc_params)) + writel(0, &oxu->regs->segment); + + oxu->command &= ~(CMD_LRESET | CMD_IAAD | CMD_PSE | + CMD_ASE | CMD_RESET); + oxu->command |= CMD_RUN; + writel(oxu->command, &oxu->regs->command); + dbg_cmd(oxu, "init", oxu->command); + + /* + * Start, enabling full USB 2.0 functionality ... usb 1.1 devices + * are explicitly handed to companion controller(s), so no TT is + * involved with the root hub. (Except where one is integrated, + * and there's no companion controller unless maybe for USB OTG.) + */ + hcd->state = HC_STATE_RUNNING; + writel(FLAG_CF, &oxu->regs->configured_flag); + readl(&oxu->regs->command); /* unblock posted writes */ + + temp = HC_VERSION(readl(&oxu->caps->hc_capbase)); + oxu_info(oxu, "USB %x.%x started, quasi-EHCI %x.%02x, driver %s%s\n", + ((oxu->sbrn & 0xf0)>>4), (oxu->sbrn & 0x0f), + temp >> 8, temp & 0xff, DRIVER_VERSION, + ignore_oc ? ", overcurrent ignored" : ""); + + writel(INTR_MASK, &oxu->regs->intr_enable); /* Turn On Interrupts */ + + return 0; +} + +static void oxu_stop(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + + /* Turn off port power on all root hub ports. */ + ehci_port_power(oxu, 0); + + /* no more interrupts ... */ + del_timer_sync(&oxu->watchdog); + + spin_lock_irq(&oxu->lock); + if (HC_IS_RUNNING(hcd->state)) + ehci_quiesce(oxu); + + ehci_reset(oxu); + writel(0, &oxu->regs->intr_enable); + spin_unlock_irq(&oxu->lock); + + /* let companion controllers work when we aren't */ + writel(0, &oxu->regs->configured_flag); + + /* root hub is shut down separately (first, when possible) */ + spin_lock_irq(&oxu->lock); + if (oxu->async) + ehci_work(oxu); + spin_unlock_irq(&oxu->lock); + ehci_mem_cleanup(oxu); + + dbg_status(oxu, "oxu_stop completed", readl(&oxu->regs->status)); +} + +/* Kick in for silicon on any bus (not just pci, etc). + * This forcibly disables dma and IRQs, helping kexec and other cases + * where the next system software may expect clean state. + */ +static void oxu_shutdown(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + + (void) ehci_halt(oxu); + ehci_turn_off_all_ports(oxu); + + /* make BIOS/etc use companion controller during reboot */ + writel(0, &oxu->regs->configured_flag); + + /* unblock posted writes */ + readl(&oxu->regs->configured_flag); +} + +/* Non-error returns are a promise to giveback() the urb later + * we drop ownership so next owner (or urb unlink) can get it + * + * urb + dev is in hcd.self.controller.urb_list + * we're queueing TDs onto software and hardware lists + * + * hcd-specific init for hcpriv hasn't been done yet + * + * NOTE: control, bulk, and interrupt share the same code to append TDs + * to a (possibly active) QH, and the same QH scanning code. + */ +static int __oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + struct list_head qtd_list; + + INIT_LIST_HEAD(&qtd_list); + + switch (usb_pipetype(urb->pipe)) { + case PIPE_CONTROL: + case PIPE_BULK: + default: + if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags)) + return -ENOMEM; + return submit_async(oxu, urb, &qtd_list, mem_flags); + + case PIPE_INTERRUPT: + if (!qh_urb_transaction(oxu, urb, &qtd_list, mem_flags)) + return -ENOMEM; + return intr_submit(oxu, urb, &qtd_list, mem_flags); + + case PIPE_ISOCHRONOUS: + if (urb->dev->speed == USB_SPEED_HIGH) + return itd_submit(oxu, urb, mem_flags); + else + return sitd_submit(oxu, urb, mem_flags); + } +} + +/* This function is responsible for breaking URBs with big data size + * into smaller size and processing small urbs in sequence. + */ +static int oxu_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int num, rem; + int transfer_buffer_length; + void *transfer_buffer; + struct urb *murb; + int i, ret; + + /* If not bulk pipe just enqueue the URB */ + if (!usb_pipebulk(urb->pipe)) + return __oxu_urb_enqueue(hcd, urb, mem_flags); + + /* Otherwise we should verify the USB transfer buffer size! */ + transfer_buffer = urb->transfer_buffer; + transfer_buffer_length = urb->transfer_buffer_length; + + num = urb->transfer_buffer_length / 4096; + rem = urb->transfer_buffer_length % 4096; + if (rem != 0) + num++; + + /* If URB is smaller than 4096 bytes just enqueue it! */ + if (num == 1) + return __oxu_urb_enqueue(hcd, urb, mem_flags); + + /* Ok, we have more job to do! :) */ + + for (i = 0; i < num - 1; i++) { + /* Get free micro URB poll till a free urb is recieved */ + + do { + murb = (struct urb *) oxu_murb_alloc(oxu); + if (!murb) + schedule(); + } while (!murb); + + /* Coping the urb */ + memcpy(murb, urb, sizeof(struct urb)); + + murb->transfer_buffer_length = 4096; + murb->transfer_buffer = transfer_buffer + i * 4096; + + /* Null pointer for the encodes that this is a micro urb */ + murb->complete = NULL; + + ((struct oxu_murb *) murb)->main = urb; + ((struct oxu_murb *) murb)->last = 0; + + /* This loop is to guarantee urb to be processed when there's + * not enough resources at a particular time by retrying. + */ + do { + ret = __oxu_urb_enqueue(hcd, murb, mem_flags); + if (ret) + schedule(); + } while (ret); + } + + /* Last urb requires special handling */ + + /* Get free micro URB poll till a free urb is recieved */ + do { + murb = (struct urb *) oxu_murb_alloc(oxu); + if (!murb) + schedule(); + } while (!murb); + + /* Coping the urb */ + memcpy(murb, urb, sizeof(struct urb)); + + murb->transfer_buffer_length = rem > 0 ? rem : 4096; + murb->transfer_buffer = transfer_buffer + (num - 1) * 4096; + + /* Null pointer for the encodes that this is a micro urb */ + murb->complete = NULL; + + ((struct oxu_murb *) murb)->main = urb; + ((struct oxu_murb *) murb)->last = 1; + + do { + ret = __oxu_urb_enqueue(hcd, murb, mem_flags); + if (ret) + schedule(); + } while (ret); + + return ret; +} + +/* Remove from hardware lists. + * Completions normally happen asynchronously + */ +static int oxu_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + struct ehci_qh *qh; + unsigned long flags; + + spin_lock_irqsave(&oxu->lock, flags); + switch (usb_pipetype(urb->pipe)) { + case PIPE_CONTROL: + case PIPE_BULK: + default: + qh = (struct ehci_qh *) urb->hcpriv; + if (!qh) + break; + unlink_async(oxu, qh); + break; + + case PIPE_INTERRUPT: + qh = (struct ehci_qh *) urb->hcpriv; + if (!qh) + break; + switch (qh->qh_state) { + case QH_STATE_LINKED: + intr_deschedule(oxu, qh); + /* FALL THROUGH */ + case QH_STATE_IDLE: + qh_completions(oxu, qh); + break; + default: + oxu_dbg(oxu, "bogus qh %p state %d\n", + qh, qh->qh_state); + goto done; + } + + /* reschedule QH iff another request is queued */ + if (!list_empty(&qh->qtd_list) + && HC_IS_RUNNING(hcd->state)) { + int status; + + status = qh_schedule(oxu, qh); + spin_unlock_irqrestore(&oxu->lock, flags); + + if (status != 0) { + /* shouldn't happen often, but ... + * FIXME kill those tds' urbs + */ + err("can't reschedule qh %p, err %d", + qh, status); + } + return status; + } + break; + } +done: + spin_unlock_irqrestore(&oxu->lock, flags); + return 0; +} + +/* Bulk qh holds the data toggle */ +static void oxu_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *ep) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + unsigned long flags; + struct ehci_qh *qh, *tmp; + + /* ASSERT: any requests/urbs are being unlinked */ + /* ASSERT: nobody can be submitting urbs for this any more */ + +rescan: + spin_lock_irqsave(&oxu->lock, flags); + qh = ep->hcpriv; + if (!qh) + goto done; + + /* endpoints can be iso streams. for now, we don't + * accelerate iso completions ... so spin a while. + */ + if (qh->hw_info1 == 0) { + oxu_vdbg(oxu, "iso delay\n"); + goto idle_timeout; + } + + if (!HC_IS_RUNNING(hcd->state)) + qh->qh_state = QH_STATE_IDLE; + switch (qh->qh_state) { + case QH_STATE_LINKED: + for (tmp = oxu->async->qh_next.qh; + tmp && tmp != qh; + tmp = tmp->qh_next.qh) + continue; + /* periodic qh self-unlinks on empty */ + if (!tmp) + goto nogood; + unlink_async(oxu, qh); + /* FALL THROUGH */ + case QH_STATE_UNLINK: /* wait for hw to finish? */ +idle_timeout: + spin_unlock_irqrestore(&oxu->lock, flags); + schedule_timeout_uninterruptible(1); + goto rescan; + case QH_STATE_IDLE: /* fully unlinked */ + if (list_empty(&qh->qtd_list)) { + qh_put(qh); + break; + } + /* else FALL THROUGH */ + default: +nogood: + /* caller was supposed to have unlinked any requests; + * that's not our job. just leak this memory. + */ + oxu_err(oxu, "qh %p (#%02x) state %d%s\n", + qh, ep->desc.bEndpointAddress, qh->qh_state, + list_empty(&qh->qtd_list) ? "" : "(has tds)"); + break; + } + ep->hcpriv = NULL; +done: + spin_unlock_irqrestore(&oxu->lock, flags); + return; +} + +static int oxu_get_frame(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + + return (readl(&oxu->regs->frame_index) >> 3) % + oxu->periodic_size; +} + +/* Build "status change" packet (one or two bytes) from HC registers */ +static int oxu_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + u32 temp, mask, status = 0; + int ports, i, retval = 1; + unsigned long flags; + + /* if !USB_SUSPEND, root hub timers won't get shut down ... */ + if (!HC_IS_RUNNING(hcd->state)) + return 0; + + /* init status to no-changes */ + buf[0] = 0; + ports = HCS_N_PORTS(oxu->hcs_params); + if (ports > 7) { + buf[1] = 0; + retval++; + } + + /* Some boards (mostly VIA?) report bogus overcurrent indications, + * causing massive log spam unless we completely ignore them. It + * may be relevant that VIA VT8235 controlers, where PORT_POWER is + * always set, seem to clear PORT_OCC and PORT_CSC when writing to + * PORT_POWER; that's surprising, but maybe within-spec. + */ + if (!ignore_oc) + mask = PORT_CSC | PORT_PEC | PORT_OCC; + else + mask = PORT_CSC | PORT_PEC; + + /* no hub change reports (bit 0) for now (power, ...) */ + + /* port N changes (bit N)? */ + spin_lock_irqsave(&oxu->lock, flags); + for (i = 0; i < ports; i++) { + temp = readl(&oxu->regs->port_status[i]); + + /* + * Return status information even for ports with OWNER set. + * Otherwise khubd wouldn't see the disconnect event when a + * high-speed device is switched over to the companion + * controller by the user. + */ + + if (!(temp & PORT_CONNECT)) + oxu->reset_done[i] = 0; + if ((temp & mask) != 0 || ((temp & PORT_RESUME) != 0 && + time_after_eq(jiffies, oxu->reset_done[i]))) { + if (i < 7) + buf[0] |= 1 << (i + 1); + else + buf[1] |= 1 << (i - 7); + status = STS_PCD; + } + } + /* FIXME autosuspend idle root hubs */ + spin_unlock_irqrestore(&oxu->lock, flags); + return status ? retval : 0; +} + +/* Returns the speed of a device attached to a port on the root hub. */ +static inline unsigned int oxu_port_speed(struct oxu_hcd *oxu, + unsigned int portsc) +{ + switch ((portsc >> 26) & 3) { + case 0: + return 0; + case 1: + return 1 << USB_PORT_FEAT_LOWSPEED; + case 2: + default: + return 1 << USB_PORT_FEAT_HIGHSPEED; + } +} + +#define PORT_WAKE_BITS (PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E) +static int oxu_hub_control(struct usb_hcd *hcd, u16 typeReq, + u16 wValue, u16 wIndex, char *buf, u16 wLength) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int ports = HCS_N_PORTS(oxu->hcs_params); + u32 __iomem *status_reg = &oxu->regs->port_status[wIndex - 1]; + u32 temp, status; + unsigned long flags; + int retval = 0; + unsigned selector; + + /* + * FIXME: support SetPortFeatures USB_PORT_FEAT_INDICATOR. + * HCS_INDICATOR may say we can change LEDs to off/amber/green. + * (track current state ourselves) ... blink for diagnostics, + * power, "this is the one", etc. EHCI spec supports this. + */ + + spin_lock_irqsave(&oxu->lock, flags); + switch (typeReq) { + case ClearHubFeature: + switch (wValue) { + case C_HUB_LOCAL_POWER: + case C_HUB_OVER_CURRENT: + /* no hub-wide feature/status flags */ + break; + default: + goto error; + } + break; + case ClearPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + temp = readl(status_reg); + + /* + * Even if OWNER is set, so the port is owned by the + * companion controller, khubd needs to be able to clear + * the port-change status bits (especially + * USB_PORT_FEAT_C_CONNECTION). + */ + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + writel(temp & ~PORT_PE, status_reg); + break; + case USB_PORT_FEAT_C_ENABLE: + writel((temp & ~PORT_RWC_BITS) | PORT_PEC, status_reg); + break; + case USB_PORT_FEAT_SUSPEND: + if (temp & PORT_RESET) + goto error; + if (temp & PORT_SUSPEND) { + if ((temp & PORT_PE) == 0) + goto error; + /* resume signaling for 20 msec */ + temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS); + writel(temp | PORT_RESUME, status_reg); + oxu->reset_done[wIndex] = jiffies + + msecs_to_jiffies(20); + } + break; + case USB_PORT_FEAT_C_SUSPEND: + /* we auto-clear this feature */ + break; + case USB_PORT_FEAT_POWER: + if (HCS_PPC(oxu->hcs_params)) + writel(temp & ~(PORT_RWC_BITS | PORT_POWER), + status_reg); + break; + case USB_PORT_FEAT_C_CONNECTION: + writel((temp & ~PORT_RWC_BITS) | PORT_CSC, status_reg); + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + writel((temp & ~PORT_RWC_BITS) | PORT_OCC, status_reg); + break; + case USB_PORT_FEAT_C_RESET: + /* GetPortStatus clears reset */ + break; + default: + goto error; + } + readl(&oxu->regs->command); /* unblock posted write */ + break; + case GetHubDescriptor: + ehci_hub_descriptor(oxu, (struct usb_hub_descriptor *) + buf); + break; + case GetHubStatus: + /* no hub-wide feature/status flags */ + memset(buf, 0, 4); + break; + case GetPortStatus: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + status = 0; + temp = readl(status_reg); + + /* wPortChange bits */ + if (temp & PORT_CSC) + status |= 1 << USB_PORT_FEAT_C_CONNECTION; + if (temp & PORT_PEC) + status |= 1 << USB_PORT_FEAT_C_ENABLE; + if ((temp & PORT_OCC) && !ignore_oc) + status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT; + + /* whoever resumes must GetPortStatus to complete it!! */ + if (temp & PORT_RESUME) { + + /* Remote Wakeup received? */ + if (!oxu->reset_done[wIndex]) { + /* resume signaling for 20 msec */ + oxu->reset_done[wIndex] = jiffies + + msecs_to_jiffies(20); + /* check the port again */ + mod_timer(&oxu_to_hcd(oxu)->rh_timer, + oxu->reset_done[wIndex]); + } + + /* resume completed? */ + else if (time_after_eq(jiffies, + oxu->reset_done[wIndex])) { + status |= 1 << USB_PORT_FEAT_C_SUSPEND; + oxu->reset_done[wIndex] = 0; + + /* stop resume signaling */ + temp = readl(status_reg); + writel(temp & ~(PORT_RWC_BITS | PORT_RESUME), + status_reg); + retval = handshake(oxu, status_reg, + PORT_RESUME, 0, 2000 /* 2msec */); + if (retval != 0) { + oxu_err(oxu, + "port %d resume error %d\n", + wIndex + 1, retval); + goto error; + } + temp &= ~(PORT_SUSPEND|PORT_RESUME|(3<<10)); + } + } + + /* whoever resets must GetPortStatus to complete it!! */ + if ((temp & PORT_RESET) + && time_after_eq(jiffies, + oxu->reset_done[wIndex])) { + status |= 1 << USB_PORT_FEAT_C_RESET; + oxu->reset_done[wIndex] = 0; + + /* force reset to complete */ + writel(temp & ~(PORT_RWC_BITS | PORT_RESET), + status_reg); + /* REVISIT: some hardware needs 550+ usec to clear + * this bit; seems too long to spin routinely... + */ + retval = handshake(oxu, status_reg, + PORT_RESET, 0, 750); + if (retval != 0) { + oxu_err(oxu, "port %d reset error %d\n", + wIndex + 1, retval); + goto error; + } + + /* see what we found out */ + temp = check_reset_complete(oxu, wIndex, status_reg, + readl(status_reg)); + } + + /* transfer dedicated ports to the companion hc */ + if ((temp & PORT_CONNECT) && + test_bit(wIndex, &oxu->companion_ports)) { + temp &= ~PORT_RWC_BITS; + temp |= PORT_OWNER; + writel(temp, status_reg); + oxu_dbg(oxu, "port %d --> companion\n", wIndex + 1); + temp = readl(status_reg); + } + + /* + * Even if OWNER is set, there's no harm letting khubd + * see the wPortStatus values (they should all be 0 except + * for PORT_POWER anyway). + */ + + if (temp & PORT_CONNECT) { + status |= 1 << USB_PORT_FEAT_CONNECTION; + /* status may be from integrated TT */ + status |= oxu_port_speed(oxu, temp); + } + if (temp & PORT_PE) + status |= 1 << USB_PORT_FEAT_ENABLE; + if (temp & (PORT_SUSPEND|PORT_RESUME)) + status |= 1 << USB_PORT_FEAT_SUSPEND; + if (temp & PORT_OC) + status |= 1 << USB_PORT_FEAT_OVER_CURRENT; + if (temp & PORT_RESET) + status |= 1 << USB_PORT_FEAT_RESET; + if (temp & PORT_POWER) + status |= 1 << USB_PORT_FEAT_POWER; + +#ifndef OXU_VERBOSE_DEBUG + if (status & ~0xffff) /* only if wPortChange is interesting */ +#endif + dbg_port(oxu, "GetStatus", wIndex + 1, temp); + put_unaligned(cpu_to_le32(status), (__le32 *) buf); + break; + case SetHubFeature: + switch (wValue) { + case C_HUB_LOCAL_POWER: + case C_HUB_OVER_CURRENT: + /* no hub-wide feature/status flags */ + break; + default: + goto error; + } + break; + case SetPortFeature: + selector = wIndex >> 8; + wIndex &= 0xff; + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + temp = readl(status_reg); + if (temp & PORT_OWNER) + break; + + temp &= ~PORT_RWC_BITS; + switch (wValue) { + case USB_PORT_FEAT_SUSPEND: + if ((temp & PORT_PE) == 0 + || (temp & PORT_RESET) != 0) + goto error; + if (device_may_wakeup(&hcd->self.root_hub->dev)) + temp |= PORT_WAKE_BITS; + writel(temp | PORT_SUSPEND, status_reg); + break; + case USB_PORT_FEAT_POWER: + if (HCS_PPC(oxu->hcs_params)) + writel(temp | PORT_POWER, status_reg); + break; + case USB_PORT_FEAT_RESET: + if (temp & PORT_RESUME) + goto error; + /* line status bits may report this as low speed, + * which can be fine if this root hub has a + * transaction translator built in. + */ + oxu_vdbg(oxu, "port %d reset\n", wIndex + 1); + temp |= PORT_RESET; + temp &= ~PORT_PE; + + /* + * caller must wait, then call GetPortStatus + * usb 2.0 spec says 50 ms resets on root + */ + oxu->reset_done[wIndex] = jiffies + + msecs_to_jiffies(50); + writel(temp, status_reg); + break; + + /* For downstream facing ports (these): one hub port is put + * into test mode according to USB2 11.24.2.13, then the hub + * must be reset (which for root hub now means rmmod+modprobe, + * or else system reboot). See EHCI 2.3.9 and 4.14 for info + * about the EHCI-specific stuff. + */ + case USB_PORT_FEAT_TEST: + if (!selector || selector > 5) + goto error; + ehci_quiesce(oxu); + ehci_halt(oxu); + temp |= selector << 16; + writel(temp, status_reg); + break; + + default: + goto error; + } + readl(&oxu->regs->command); /* unblock posted writes */ + break; + + default: +error: + /* "stall" on error */ + retval = -EPIPE; + } + spin_unlock_irqrestore(&oxu->lock, flags); + return retval; +} + +#ifdef CONFIG_PM + +static int oxu_bus_suspend(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + int port; + int mask; + + oxu_dbg(oxu, "suspend root hub\n"); + + if (time_before(jiffies, oxu->next_statechange)) + msleep(5); + + port = HCS_N_PORTS(oxu->hcs_params); + spin_lock_irq(&oxu->lock); + + /* stop schedules, clean any completed work */ + if (HC_IS_RUNNING(hcd->state)) { + ehci_quiesce(oxu); + hcd->state = HC_STATE_QUIESCING; + } + oxu->command = readl(&oxu->regs->command); + if (oxu->reclaim) + oxu->reclaim_ready = 1; + ehci_work(oxu); + + /* Unlike other USB host controller types, EHCI doesn't have + * any notion of "global" or bus-wide suspend. The driver has + * to manually suspend all the active unsuspended ports, and + * then manually resume them in the bus_resume() routine. + */ + oxu->bus_suspended = 0; + while (port--) { + u32 __iomem *reg = &oxu->regs->port_status[port]; + u32 t1 = readl(reg) & ~PORT_RWC_BITS; + u32 t2 = t1; + + /* keep track of which ports we suspend */ + if ((t1 & PORT_PE) && !(t1 & PORT_OWNER) && + !(t1 & PORT_SUSPEND)) { + t2 |= PORT_SUSPEND; + set_bit(port, &oxu->bus_suspended); + } + + /* enable remote wakeup on all ports */ + if (device_may_wakeup(&hcd->self.root_hub->dev)) + t2 |= PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E; + else + t2 &= ~(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E); + + if (t1 != t2) { + oxu_vdbg(oxu, "port %d, %08x -> %08x\n", + port + 1, t1, t2); + writel(t2, reg); + } + } + + /* turn off now-idle HC */ + del_timer_sync(&oxu->watchdog); + ehci_halt(oxu); + hcd->state = HC_STATE_SUSPENDED; + + /* allow remote wakeup */ + mask = INTR_MASK; + if (!device_may_wakeup(&hcd->self.root_hub->dev)) + mask &= ~STS_PCD; + writel(mask, &oxu->regs->intr_enable); + readl(&oxu->regs->intr_enable); + + oxu->next_statechange = jiffies + msecs_to_jiffies(10); + spin_unlock_irq(&oxu->lock); + return 0; +} + +/* Caller has locked the root hub, and should reset/reinit on error */ +static int oxu_bus_resume(struct usb_hcd *hcd) +{ + struct oxu_hcd *oxu = hcd_to_oxu(hcd); + u32 temp; + int i; + + if (time_before(jiffies, oxu->next_statechange)) + msleep(5); + spin_lock_irq(&oxu->lock); + + /* Ideally and we've got a real resume here, and no port's power + * was lost. (For PCI, that means Vaux was maintained.) But we + * could instead be restoring a swsusp snapshot -- so that BIOS was + * the last user of the controller, not reset/pm hardware keeping + * state we gave to it. + */ + temp = readl(&oxu->regs->intr_enable); + oxu_dbg(oxu, "resume root hub%s\n", temp ? "" : " after power loss"); + + /* at least some APM implementations will try to deliver + * IRQs right away, so delay them until we're ready. + */ + writel(0, &oxu->regs->intr_enable); + + /* re-init operational registers */ + writel(0, &oxu->regs->segment); + writel(oxu->periodic_dma, &oxu->regs->frame_list); + writel((u32) oxu->async->qh_dma, &oxu->regs->async_next); + + /* restore CMD_RUN, framelist size, and irq threshold */ + writel(oxu->command, &oxu->regs->command); + + /* Some controller/firmware combinations need a delay during which + * they set up the port statuses. See Bugzilla #8190. */ + mdelay(8); + + /* manually resume the ports we suspended during bus_suspend() */ + i = HCS_N_PORTS(oxu->hcs_params); + while (i--) { + temp = readl(&oxu->regs->port_status[i]); + temp &= ~(PORT_RWC_BITS + | PORT_WKOC_E | PORT_WKDISC_E | PORT_WKCONN_E); + if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) { + oxu->reset_done[i] = jiffies + msecs_to_jiffies(20); + temp |= PORT_RESUME; + } + writel(temp, &oxu->regs->port_status[i]); + } + i = HCS_N_PORTS(oxu->hcs_params); + mdelay(20); + while (i--) { + temp = readl(&oxu->regs->port_status[i]); + if (test_bit(i, &oxu->bus_suspended) && (temp & PORT_SUSPEND)) { + temp &= ~(PORT_RWC_BITS | PORT_RESUME); + writel(temp, &oxu->regs->port_status[i]); + oxu_vdbg(oxu, "resumed port %d\n", i + 1); + } + } + (void) readl(&oxu->regs->command); + + /* maybe re-activate the schedule(s) */ + temp = 0; + if (oxu->async->qh_next.qh) + temp |= CMD_ASE; + if (oxu->periodic_sched) + temp |= CMD_PSE; + if (temp) { + oxu->command |= temp; + writel(oxu->command, &oxu->regs->command); + } + + oxu->next_statechange = jiffies + msecs_to_jiffies(5); + hcd->state = HC_STATE_RUNNING; + + /* Now we can safely re-enable irqs */ + writel(INTR_MASK, &oxu->regs->intr_enable); + + spin_unlock_irq(&oxu->lock); + return 0; +} + +#else + +static int oxu_bus_suspend(struct usb_hcd *hcd) +{ + return 0; +} + +static int oxu_bus_resume(struct usb_hcd *hcd) +{ + return 0; +} + +#endif /* CONFIG_PM */ + +static const struct hc_driver oxu_hc_driver = { + .description = "oxu210hp_hcd", + .product_desc = "oxu210hp HCD", + .hcd_priv_size = sizeof(struct oxu_hcd), + + /* + * Generic hardware linkage + */ + .irq = oxu_irq, + .flags = HCD_MEMORY | HCD_USB2, + + /* + * Basic lifecycle operations + */ + .reset = oxu_reset, + .start = oxu_run, + .stop = oxu_stop, + .shutdown = oxu_shutdown, + + /* + * Managing i/o requests and associated device resources + */ + .urb_enqueue = oxu_urb_enqueue, + .urb_dequeue = oxu_urb_dequeue, + .endpoint_disable = oxu_endpoint_disable, + + /* + * Scheduling support + */ + .get_frame_number = oxu_get_frame, + + /* + * Root hub support + */ + .hub_status_data = oxu_hub_status_data, + .hub_control = oxu_hub_control, + .bus_suspend = oxu_bus_suspend, + .bus_resume = oxu_bus_resume, +}; + +/* + * Module stuff + */ + +static void oxu_configuration(struct platform_device *pdev, void *base) +{ + u32 tmp; + + /* Initialize top level registers. + * First write ever + */ + oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D); + oxu_writel(base, OXU_SOFTRESET, OXU_SRESET); + oxu_writel(base, OXU_HOSTIFCONFIG, 0x0000037D); + + tmp = oxu_readl(base, OXU_PIOBURSTREADCTRL); + oxu_writel(base, OXU_PIOBURSTREADCTRL, tmp | 0x0040); + + oxu_writel(base, OXU_ASO, OXU_SPHPOEN | OXU_OVRCCURPUPDEN | + OXU_COMPARATOR | OXU_ASO_OP); + + tmp = oxu_readl(base, OXU_CLKCTRL_SET); + oxu_writel(base, OXU_CLKCTRL_SET, tmp | OXU_SYSCLKEN | OXU_USBOTGCLKEN); + + /* Clear all top interrupt enable */ + oxu_writel(base, OXU_CHIPIRQEN_CLR, 0xff); + + /* Clear all top interrupt status */ + oxu_writel(base, OXU_CHIPIRQSTATUS, 0xff); + + /* Enable all needed top interrupt except OTG SPH core */ + oxu_writel(base, OXU_CHIPIRQEN_SET, OXU_USBSPHLPWUI | OXU_USBOTGLPWUI); +} + +static int oxu_verify_id(struct platform_device *pdev, void *base) +{ + u32 id; + char *bo[] = { + "reserved", + "128-pin LQFP", + "84-pin TFBGA", + "reserved", + }; + + /* Read controller signature register to find a match */ + id = oxu_readl(base, OXU_DEVICEID); + dev_info(&pdev->dev, "device ID %x\n", id); + if ((id & OXU_REV_MASK) != (OXU_REV_2100 << OXU_REV_SHIFT)) + return -1; + + dev_info(&pdev->dev, "found device %x %s (%04x:%04x)\n", + id >> OXU_REV_SHIFT, + bo[(id & OXU_BO_MASK) >> OXU_BO_SHIFT], + (id & OXU_MAJ_REV_MASK) >> OXU_MAJ_REV_SHIFT, + (id & OXU_MIN_REV_MASK) >> OXU_MIN_REV_SHIFT); + + return 0; +} + +static const struct hc_driver oxu_hc_driver; +static struct usb_hcd *oxu_create(struct platform_device *pdev, + unsigned long memstart, unsigned long memlen, + void *base, int irq, int otg) +{ + struct device *dev = &pdev->dev; + + struct usb_hcd *hcd; + struct oxu_hcd *oxu; + int ret; + + /* Set endian mode and host mode */ + oxu_writel(base + (otg ? OXU_OTG_CORE_OFFSET : OXU_SPH_CORE_OFFSET), + OXU_USBMODE, + OXU_CM_HOST_ONLY | OXU_ES_LITTLE | OXU_VBPS); + + hcd = usb_create_hcd(&oxu_hc_driver, dev, + otg ? "oxu210hp_otg" : "oxu210hp_sph"); + if (!hcd) + return ERR_PTR(-ENOMEM); + + hcd->rsrc_start = memstart; + hcd->rsrc_len = memlen; + hcd->regs = base; + hcd->irq = irq; + hcd->state = HC_STATE_HALT; + + oxu = hcd_to_oxu(hcd); + oxu->is_otg = otg; + + ret = usb_add_hcd(hcd, irq, IRQF_SHARED); + if (ret < 0) + return ERR_PTR(ret); + + return hcd; +} + +static int oxu_init(struct platform_device *pdev, + unsigned long memstart, unsigned long memlen, + void *base, int irq) +{ + struct oxu_info *info = platform_get_drvdata(pdev); + struct usb_hcd *hcd; + int ret; + + /* First time configuration at start up */ + oxu_configuration(pdev, base); + + ret = oxu_verify_id(pdev, base); + if (ret) { + dev_err(&pdev->dev, "no devices found!\n"); + return -ENODEV; + } + + /* Create the OTG controller */ + hcd = oxu_create(pdev, memstart, memlen, base, irq, 1); + if (IS_ERR(hcd)) { + dev_err(&pdev->dev, "cannot create OTG controller!\n"); + ret = PTR_ERR(hcd); + goto error_create_otg; + } + info->hcd[0] = hcd; + + /* Create the SPH host controller */ + hcd = oxu_create(pdev, memstart, memlen, base, irq, 0); + if (IS_ERR(hcd)) { + dev_err(&pdev->dev, "cannot create SPH controller!\n"); + ret = PTR_ERR(hcd); + goto error_create_sph; + } + info->hcd[1] = hcd; + + oxu_writel(base, OXU_CHIPIRQEN_SET, + oxu_readl(base, OXU_CHIPIRQEN_SET) | 3); + + return 0; + +error_create_sph: + usb_remove_hcd(info->hcd[0]); + usb_put_hcd(info->hcd[0]); + +error_create_otg: + return ret; +} + +static int oxu_drv_probe(struct platform_device *pdev) +{ + struct resource *res; + void *base; + unsigned long memstart, memlen; + int irq, ret; + struct oxu_info *info; + + if (usb_disabled()) + return -ENODEV; + + /* + * Get the platform resources + */ + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (!res) { + dev_err(&pdev->dev, + "no IRQ! Check %s setup!\n", dev_name(&pdev->dev)); + return -ENODEV; + } + irq = res->start; + dev_dbg(&pdev->dev, "IRQ resource %d\n", irq); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no registers address! Check %s setup!\n", + dev_name(&pdev->dev)); + return -ENODEV; + } + memstart = res->start; + memlen = res->end - res->start + 1; + dev_dbg(&pdev->dev, "MEM resource %lx-%lx\n", memstart, memlen); + if (!request_mem_region(memstart, memlen, + oxu_hc_driver.description)) { + dev_dbg(&pdev->dev, "memory area already in use\n"); + return -EBUSY; + } + + ret = set_irq_type(irq, IRQF_TRIGGER_FALLING); + if (ret) { + dev_err(&pdev->dev, "error setting irq type\n"); + ret = -EFAULT; + goto error_set_irq_type; + } + + base = ioremap(memstart, memlen); + if (!base) { + dev_dbg(&pdev->dev, "error mapping memory\n"); + ret = -EFAULT; + goto error_ioremap; + } + + /* Allocate a driver data struct to hold useful info for both + * SPH & OTG devices + */ + info = kzalloc(sizeof(struct oxu_info), GFP_KERNEL); + if (!info) { + dev_dbg(&pdev->dev, "error allocating memory\n"); + ret = -EFAULT; + goto error_alloc; + } + platform_set_drvdata(pdev, info); + + ret = oxu_init(pdev, memstart, memlen, base, irq); + if (ret < 0) { + dev_dbg(&pdev->dev, "cannot init USB devices\n"); + goto error_init; + } + + dev_info(&pdev->dev, "devices enabled and running\n"); + platform_set_drvdata(pdev, info); + + return 0; + +error_init: + kfree(info); + platform_set_drvdata(pdev, NULL); + +error_alloc: + iounmap(base); + +error_set_irq_type: +error_ioremap: + release_mem_region(memstart, memlen); + + dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); + return ret; +} + +static void oxu_remove(struct platform_device *pdev, struct usb_hcd *hcd) +{ + usb_remove_hcd(hcd); + usb_put_hcd(hcd); +} + +static int oxu_drv_remove(struct platform_device *pdev) +{ + struct oxu_info *info = platform_get_drvdata(pdev); + unsigned long memstart = info->hcd[0]->rsrc_start, + memlen = info->hcd[0]->rsrc_len; + void *base = info->hcd[0]->regs; + + oxu_remove(pdev, info->hcd[0]); + oxu_remove(pdev, info->hcd[1]); + + iounmap(base); + release_mem_region(memstart, memlen); + + kfree(info); + platform_set_drvdata(pdev, NULL); + + return 0; +} + +static void oxu_drv_shutdown(struct platform_device *pdev) +{ + oxu_drv_remove(pdev); +} + +#if 0 +/* FIXME: TODO */ +static int oxu_drv_suspend(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct usb_hcd *hcd = dev_get_drvdata(dev); + + return 0; +} + +static int oxu_drv_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct usb_hcd *hcd = dev_get_drvdata(dev); + + return 0; +} +#else +#define oxu_drv_suspend NULL +#define oxu_drv_resume NULL +#endif + +static struct platform_driver oxu_driver = { + .probe = oxu_drv_probe, + .remove = oxu_drv_remove, + .shutdown = oxu_drv_shutdown, + .suspend = oxu_drv_suspend, + .resume = oxu_drv_resume, + .driver = { + .name = "oxu210hp-hcd", + .bus = &platform_bus_type + } +}; + +static int __init oxu_module_init(void) +{ + int retval = 0; + + retval = platform_driver_register(&oxu_driver); + if (retval < 0) + return retval; + + return retval; +} + +static void __exit oxu_module_cleanup(void) +{ + platform_driver_unregister(&oxu_driver); +} + +module_init(oxu_module_init); +module_exit(oxu_module_cleanup); + +MODULE_DESCRIPTION("Oxford OXU210HP HCD driver - ver. " DRIVER_VERSION); +MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/usb/host/oxu210hp.h b/drivers/usb/host/oxu210hp.h new file mode 100644 index 000000000000..8910e271cc7d --- /dev/null +++ b/drivers/usb/host/oxu210hp.h @@ -0,0 +1,447 @@ +/* + * Host interface registers + */ + +#define OXU_DEVICEID 0x00 + #define OXU_REV_MASK 0xffff0000 + #define OXU_REV_SHIFT 16 + #define OXU_REV_2100 0x2100 + #define OXU_BO_SHIFT 8 + #define OXU_BO_MASK (0x3 << OXU_BO_SHIFT) + #define OXU_MAJ_REV_SHIFT 4 + #define OXU_MAJ_REV_MASK (0xf << OXU_MAJ_REV_SHIFT) + #define OXU_MIN_REV_SHIFT 0 + #define OXU_MIN_REV_MASK (0xf << OXU_MIN_REV_SHIFT) +#define OXU_HOSTIFCONFIG 0x04 +#define OXU_SOFTRESET 0x08 + #define OXU_SRESET (1 << 0) + +#define OXU_PIOBURSTREADCTRL 0x0C + +#define OXU_CHIPIRQSTATUS 0x10 +#define OXU_CHIPIRQEN_SET 0x14 +#define OXU_CHIPIRQEN_CLR 0x18 + #define OXU_USBSPHLPWUI 0x00000080 + #define OXU_USBOTGLPWUI 0x00000040 + #define OXU_USBSPHI 0x00000002 + #define OXU_USBOTGI 0x00000001 + +#define OXU_CLKCTRL_SET 0x1C + #define OXU_SYSCLKEN 0x00000008 + #define OXU_USBSPHCLKEN 0x00000002 + #define OXU_USBOTGCLKEN 0x00000001 + +#define OXU_ASO 0x68 + #define OXU_SPHPOEN 0x00000100 + #define OXU_OVRCCURPUPDEN 0x00000800 + #define OXU_ASO_OP (1 << 10) + #define OXU_COMPARATOR 0x000004000 + +#define OXU_USBMODE 0x1A8 + #define OXU_VBPS 0x00000020 + #define OXU_ES_LITTLE 0x00000000 + #define OXU_CM_HOST_ONLY 0x00000003 + +/* + * Proper EHCI structs & defines + */ + +/* Magic numbers that can affect system performance */ +#define EHCI_TUNE_CERR 3 /* 0-3 qtd retries; 0 == don't stop */ +#define EHCI_TUNE_RL_HS 4 /* nak throttle; see 4.9 */ +#define EHCI_TUNE_RL_TT 0 +#define EHCI_TUNE_MULT_HS 1 /* 1-3 transactions/uframe; 4.10.3 */ +#define EHCI_TUNE_MULT_TT 1 +#define EHCI_TUNE_FLS 2 /* (small) 256 frame schedule */ + +struct oxu_hcd; + +/* EHCI register interface, corresponds to EHCI Revision 0.95 specification */ + +/* Section 2.2 Host Controller Capability Registers */ +struct ehci_caps { + /* these fields are specified as 8 and 16 bit registers, + * but some hosts can't perform 8 or 16 bit PCI accesses. + */ + u32 hc_capbase; +#define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */ +#define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */ + u32 hcs_params; /* HCSPARAMS - offset 0x4 */ +#define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */ +#define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */ +#define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */ +#define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */ +#define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */ +#define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */ +#define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */ + + u32 hcc_params; /* HCCPARAMS - offset 0x8 */ +#define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */ +#define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */ +#define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */ +#define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */ +#define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/ +#define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */ + u8 portroute[8]; /* nibbles for routing - offset 0xC */ +} __attribute__ ((packed)); + + +/* Section 2.3 Host Controller Operational Registers */ +struct ehci_regs { + /* USBCMD: offset 0x00 */ + u32 command; +/* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */ +#define CMD_PARK (1<<11) /* enable "park" on async qh */ +#define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */ +#define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */ +#define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */ +#define CMD_ASE (1<<5) /* async schedule enable */ +#define CMD_PSE (1<<4) /* periodic schedule enable */ +/* 3:2 is periodic frame list size */ +#define CMD_RESET (1<<1) /* reset HC not bus */ +#define CMD_RUN (1<<0) /* start/stop HC */ + + /* USBSTS: offset 0x04 */ + u32 status; +#define STS_ASS (1<<15) /* Async Schedule Status */ +#define STS_PSS (1<<14) /* Periodic Schedule Status */ +#define STS_RECL (1<<13) /* Reclamation */ +#define STS_HALT (1<<12) /* Not running (any reason) */ +/* some bits reserved */ + /* these STS_* flags are also intr_enable bits (USBINTR) */ +#define STS_IAA (1<<5) /* Interrupted on async advance */ +#define STS_FATAL (1<<4) /* such as some PCI access errors */ +#define STS_FLR (1<<3) /* frame list rolled over */ +#define STS_PCD (1<<2) /* port change detect */ +#define STS_ERR (1<<1) /* "error" completion (overflow, ...) */ +#define STS_INT (1<<0) /* "normal" completion (short, ...) */ + +#define INTR_MASK (STS_IAA | STS_FATAL | STS_PCD | STS_ERR | STS_INT) + + /* USBINTR: offset 0x08 */ + u32 intr_enable; + + /* FRINDEX: offset 0x0C */ + u32 frame_index; /* current microframe number */ + /* CTRLDSSEGMENT: offset 0x10 */ + u32 segment; /* address bits 63:32 if needed */ + /* PERIODICLISTBASE: offset 0x14 */ + u32 frame_list; /* points to periodic list */ + /* ASYNCLISTADDR: offset 0x18 */ + u32 async_next; /* address of next async queue head */ + + u32 reserved[9]; + + /* CONFIGFLAG: offset 0x40 */ + u32 configured_flag; +#define FLAG_CF (1<<0) /* true: we'll support "high speed" */ + + /* PORTSC: offset 0x44 */ + u32 port_status[0]; /* up to N_PORTS */ +/* 31:23 reserved */ +#define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */ +#define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */ +#define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */ +/* 19:16 for port testing */ +#define PORT_LED_OFF (0<<14) +#define PORT_LED_AMBER (1<<14) +#define PORT_LED_GREEN (2<<14) +#define PORT_LED_MASK (3<<14) +#define PORT_OWNER (1<<13) /* true: companion hc owns this port */ +#define PORT_POWER (1<<12) /* true: has power (see PPC) */ +#define PORT_USB11(x) (((x)&(3<<10)) == (1<<10)) /* USB 1.1 device */ +/* 11:10 for detecting lowspeed devices (reset vs release ownership) */ +/* 9 reserved */ +#define PORT_RESET (1<<8) /* reset port */ +#define PORT_SUSPEND (1<<7) /* suspend port */ +#define PORT_RESUME (1<<6) /* resume it */ +#define PORT_OCC (1<<5) /* over current change */ +#define PORT_OC (1<<4) /* over current active */ +#define PORT_PEC (1<<3) /* port enable change */ +#define PORT_PE (1<<2) /* port enable */ +#define PORT_CSC (1<<1) /* connect status change */ +#define PORT_CONNECT (1<<0) /* device connected */ +#define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC) +} __attribute__ ((packed)); + +/* Appendix C, Debug port ... intended for use with special "debug devices" + * that can help if there's no serial console. (nonstandard enumeration.) + */ +struct ehci_dbg_port { + u32 control; +#define DBGP_OWNER (1<<30) +#define DBGP_ENABLED (1<<28) +#define DBGP_DONE (1<<16) +#define DBGP_INUSE (1<<10) +#define DBGP_ERRCODE(x) (((x)>>7)&0x07) +# define DBGP_ERR_BAD 1 +# define DBGP_ERR_SIGNAL 2 +#define DBGP_ERROR (1<<6) +#define DBGP_GO (1<<5) +#define DBGP_OUT (1<<4) +#define DBGP_LEN(x) (((x)>>0)&0x0f) + u32 pids; +#define DBGP_PID_GET(x) (((x)>>16)&0xff) +#define DBGP_PID_SET(data, tok) (((data)<<8)|(tok)) + u32 data03; + u32 data47; + u32 address; +#define DBGP_EPADDR(dev, ep) (((dev)<<8)|(ep)) +} __attribute__ ((packed)); + + +#define QTD_NEXT(dma) cpu_to_le32((u32)dma) + +/* + * EHCI Specification 0.95 Section 3.5 + * QTD: describe data transfer components (buffer, direction, ...) + * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram". + * + * These are associated only with "QH" (Queue Head) structures, + * used with control, bulk, and interrupt transfers. + */ +struct ehci_qtd { + /* first part defined by EHCI spec */ + __le32 hw_next; /* see EHCI 3.5.1 */ + __le32 hw_alt_next; /* see EHCI 3.5.2 */ + __le32 hw_token; /* see EHCI 3.5.3 */ +#define QTD_TOGGLE (1 << 31) /* data toggle */ +#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff) +#define QTD_IOC (1 << 15) /* interrupt on complete */ +#define QTD_CERR(tok) (((tok)>>10) & 0x3) +#define QTD_PID(tok) (((tok)>>8) & 0x3) +#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */ +#define QTD_STS_HALT (1 << 6) /* halted on error */ +#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */ +#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */ +#define QTD_STS_XACT (1 << 3) /* device gave illegal response */ +#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */ +#define QTD_STS_STS (1 << 1) /* split transaction state */ +#define QTD_STS_PING (1 << 0) /* issue PING? */ + __le32 hw_buf[5]; /* see EHCI 3.5.4 */ + __le32 hw_buf_hi[5]; /* Appendix B */ + + /* the rest is HCD-private */ + dma_addr_t qtd_dma; /* qtd address */ + struct list_head qtd_list; /* sw qtd list */ + struct urb *urb; /* qtd's urb */ + size_t length; /* length of buffer */ + + u32 qtd_buffer_len; + void *buffer; + dma_addr_t buffer_dma; + void *transfer_buffer; + void *transfer_dma; +} __attribute__ ((aligned(32))); + +/* mask NakCnt+T in qh->hw_alt_next */ +#define QTD_MASK __constant_cpu_to_le32 (~0x1f) + +#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1) + +/* Type tag from {qh, itd, sitd, fstn}->hw_next */ +#define Q_NEXT_TYPE(dma) ((dma) & __constant_cpu_to_le32 (3 << 1)) + +/* values for that type tag */ +#define Q_TYPE_QH __constant_cpu_to_le32 (1 << 1) + +/* next async queue entry, or pointer to interrupt/periodic QH */ +#define QH_NEXT(dma) (cpu_to_le32(((u32)dma)&~0x01f)|Q_TYPE_QH) + +/* for periodic/async schedules and qtd lists, mark end of list */ +#define EHCI_LIST_END __constant_cpu_to_le32(1) /* "null pointer" to hw */ + +/* + * Entries in periodic shadow table are pointers to one of four kinds + * of data structure. That's dictated by the hardware; a type tag is + * encoded in the low bits of the hardware's periodic schedule. Use + * Q_NEXT_TYPE to get the tag. + * + * For entries in the async schedule, the type tag always says "qh". + */ +union ehci_shadow { + struct ehci_qh *qh; /* Q_TYPE_QH */ + __le32 *hw_next; /* (all types) */ + void *ptr; +}; + +/* + * EHCI Specification 0.95 Section 3.6 + * QH: describes control/bulk/interrupt endpoints + * See Fig 3-7 "Queue Head Structure Layout". + * + * These appear in both the async and (for interrupt) periodic schedules. + */ + +struct ehci_qh { + /* first part defined by EHCI spec */ + __le32 hw_next; /* see EHCI 3.6.1 */ + __le32 hw_info1; /* see EHCI 3.6.2 */ +#define QH_HEAD 0x00008000 + __le32 hw_info2; /* see EHCI 3.6.2 */ +#define QH_SMASK 0x000000ff +#define QH_CMASK 0x0000ff00 +#define QH_HUBADDR 0x007f0000 +#define QH_HUBPORT 0x3f800000 +#define QH_MULT 0xc0000000 + __le32 hw_current; /* qtd list - see EHCI 3.6.4 */ + + /* qtd overlay (hardware parts of a struct ehci_qtd) */ + __le32 hw_qtd_next; + __le32 hw_alt_next; + __le32 hw_token; + __le32 hw_buf[5]; + __le32 hw_buf_hi[5]; + + /* the rest is HCD-private */ + dma_addr_t qh_dma; /* address of qh */ + union ehci_shadow qh_next; /* ptr to qh; or periodic */ + struct list_head qtd_list; /* sw qtd list */ + struct ehci_qtd *dummy; + struct ehci_qh *reclaim; /* next to reclaim */ + + struct oxu_hcd *oxu; + struct kref kref; + unsigned stamp; + + u8 qh_state; +#define QH_STATE_LINKED 1 /* HC sees this */ +#define QH_STATE_UNLINK 2 /* HC may still see this */ +#define QH_STATE_IDLE 3 /* HC doesn't see this */ +#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on reclaim q */ +#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */ + + /* periodic schedule info */ + u8 usecs; /* intr bandwidth */ + u8 gap_uf; /* uframes split/csplit gap */ + u8 c_usecs; /* ... split completion bw */ + u16 tt_usecs; /* tt downstream bandwidth */ + unsigned short period; /* polling interval */ + unsigned short start; /* where polling starts */ +#define NO_FRAME ((unsigned short)~0) /* pick new start */ + struct usb_device *dev; /* access to TT */ +} __attribute__ ((aligned(32))); + +/* + * Proper OXU210HP structs + */ + +#define OXU_OTG_CORE_OFFSET 0x00400 +#define OXU_OTG_CAP_OFFSET (OXU_OTG_CORE_OFFSET + 0x100) +#define OXU_SPH_CORE_OFFSET 0x00800 +#define OXU_SPH_CAP_OFFSET (OXU_SPH_CORE_OFFSET + 0x100) + +#define OXU_OTG_MEM 0xE000 +#define OXU_SPH_MEM 0x16000 + +/* Only how many elements & element structure are specifies here. */ +/* 2 host controllers are enabled - total size <= 28 kbytes */ +#define DEFAULT_I_TDPS 1024 +#define QHEAD_NUM 16 +#define QTD_NUM 32 +#define SITD_NUM 8 +#define MURB_NUM 8 + +#define BUFFER_NUM 8 +#define BUFFER_SIZE 512 + +struct oxu_info { + struct usb_hcd *hcd[2]; +}; + +struct oxu_buf { + u8 buffer[BUFFER_SIZE]; +} __attribute__ ((aligned(BUFFER_SIZE))); + +struct oxu_onchip_mem { + struct oxu_buf db_pool[BUFFER_NUM]; + + u32 frame_list[DEFAULT_I_TDPS]; + struct ehci_qh qh_pool[QHEAD_NUM]; + struct ehci_qtd qtd_pool[QTD_NUM]; +} __attribute__ ((aligned(4 << 10))); + +#define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */ + +struct oxu_murb { + struct urb urb; + struct urb *main; + u8 last; +}; + +struct oxu_hcd { /* one per controller */ + unsigned int is_otg:1; + + u8 qh_used[QHEAD_NUM]; + u8 qtd_used[QTD_NUM]; + u8 db_used[BUFFER_NUM]; + u8 murb_used[MURB_NUM]; + + struct oxu_onchip_mem __iomem *mem; + spinlock_t mem_lock; + + struct timer_list urb_timer; + + struct ehci_caps __iomem *caps; + struct ehci_regs __iomem *regs; + + __u32 hcs_params; /* cached register copy */ + spinlock_t lock; + + /* async schedule support */ + struct ehci_qh *async; + struct ehci_qh *reclaim; + unsigned reclaim_ready:1; + unsigned scanning:1; + + /* periodic schedule support */ + unsigned periodic_size; + __le32 *periodic; /* hw periodic table */ + dma_addr_t periodic_dma; + unsigned i_thresh; /* uframes HC might cache */ + + union ehci_shadow *pshadow; /* mirror hw periodic table */ + int next_uframe; /* scan periodic, start here */ + unsigned periodic_sched; /* periodic activity count */ + + /* per root hub port */ + unsigned long reset_done[EHCI_MAX_ROOT_PORTS]; + /* bit vectors (one bit per port) */ + unsigned long bus_suspended; /* which ports were + * already suspended at the + * start of a bus suspend + */ + unsigned long companion_ports;/* which ports are dedicated + * to the companion controller + */ + + struct timer_list watchdog; + unsigned long actions; + unsigned stamp; + unsigned long next_statechange; + u32 command; + + /* SILICON QUIRKS */ + struct list_head urb_list; /* this is the head to urb + * queue that didn't get enough + * resources + */ + struct oxu_murb *murb_pool; /* murb per split big urb */ + unsigned urb_len; + + u8 sbrn; /* packed release number */ +}; + +#define EHCI_IAA_JIFFIES (HZ/100) /* arbitrary; ~10 msec */ +#define EHCI_IO_JIFFIES (HZ/10) /* io watchdog > irq_thresh */ +#define EHCI_ASYNC_JIFFIES (HZ/20) /* async idle timeout */ +#define EHCI_SHRINK_JIFFIES (HZ/200) /* async qh unlink delay */ + +enum ehci_timer_action { + TIMER_IO_WATCHDOG, + TIMER_IAA_WATCHDOG, + TIMER_ASYNC_SHRINK, + TIMER_ASYNC_OFF, +}; + +#include <linux/oxu210hp.h> diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index ae6e70edd745..75b69847918e 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -172,9 +172,9 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev) if (!mmio_resource_enabled(pdev, 0)) return; - base = ioremap_nocache(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - if (base == NULL) return; + base = pci_ioremap_bar(pdev, 0); + if (base == NULL) + return; /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ #ifndef __hppa__ @@ -221,9 +221,9 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev) if (!mmio_resource_enabled(pdev, 0)) return; - base = ioremap_nocache(pci_resource_start(pdev, 0), - pci_resource_len(pdev, 0)); - if (base == NULL) return; + base = pci_ioremap_bar(pdev, 0); + if (base == NULL) + return; cap_length = readb(base); op_reg_base = base + cap_length; @@ -271,7 +271,7 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev) /* if boot firmware now owns EHCI, spin till * it hands it over. */ - msec = 5000; + msec = 1000; while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) { tried_handoff = 1; msleep(10); diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c index c21f14e0666a..319041205b57 100644 --- a/drivers/usb/host/r8a66597-hcd.c +++ b/drivers/usb/host/r8a66597-hcd.c @@ -2275,7 +2275,6 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev) return 0; } -#define resource_len(r) (((r)->end - (r)->start) + 1) static int __init r8a66597_probe(struct platform_device *pdev) { #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK) @@ -2296,11 +2295,10 @@ static int __init r8a66597_probe(struct platform_device *pdev) goto clean_up; } - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, - (char *)hcd_name); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { ret = -ENODEV; - dev_err(&pdev->dev, "platform_get_resource_byname error.\n"); + dev_err(&pdev->dev, "platform_get_resource error.\n"); goto clean_up; } @@ -2315,7 +2313,7 @@ static int __init r8a66597_probe(struct platform_device *pdev) irq = ires->start; irq_trigger = ires->flags & IRQF_TRIGGER_MASK; - reg = ioremap(res->start, resource_len(res)); + reg = ioremap(res->start, resource_size(res)); if (reg == NULL) { ret = -ENOMEM; dev_err(&pdev->dev, "ioremap error.\n"); diff --git a/drivers/usb/image/microtek.c b/drivers/usb/image/microtek.c index 885867a86de8..4541dfcea88f 100644 --- a/drivers/usb/image/microtek.c +++ b/drivers/usb/image/microtek.c @@ -350,17 +350,16 @@ static int mts_scsi_abort(struct scsi_cmnd *srb) static int mts_scsi_host_reset(struct scsi_cmnd *srb) { struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]); - int result, rc; + int result; MTS_DEBUG_GOT_HERE(); mts_debug_dump(desc); - rc = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf); - if (rc < 0) - return FAILED; - result = usb_reset_device(desc->usb_dev); - if (rc) + result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf); + if (result == 0) { + result = usb_reset_device(desc->usb_dev); usb_unlock_device(desc->usb_dev); + } return result ? FAILED : SUCCESS; } diff --git a/drivers/usb/misc/berry_charge.c b/drivers/usb/misc/berry_charge.c index 24e2dc3148a4..c05a85bc5925 100644 --- a/drivers/usb/misc/berry_charge.c +++ b/drivers/usb/misc/berry_charge.c @@ -123,6 +123,11 @@ static int berry_probe(struct usb_interface *intf, { struct usb_device *udev = interface_to_usbdev(intf); + if (udev->bus_mA < 500) { + dbg(&udev->dev, "Not enough power to charge available\n"); + return -ENODEV; + } + dbg(&udev->dev, "Power is set to %dmA\n", udev->actconfig->desc.bMaxPower * 2); diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 444c69c447be..5f1a19d1497d 100644 --- a/drivers/usb/misc/usbtest.c +++ b/drivers/usb/misc/usbtest.c @@ -192,8 +192,6 @@ static struct urb *simple_alloc_urb ( { struct urb *urb; - if (bytes < 0) - return NULL; urb = usb_alloc_urb (0, GFP_KERNEL); if (!urb) return urb; diff --git a/drivers/usb/mon/Kconfig b/drivers/usb/mon/Kconfig index deb9ddffa402..f28f350cd96a 100644 --- a/drivers/usb/mon/Kconfig +++ b/drivers/usb/mon/Kconfig @@ -3,14 +3,13 @@ # config USB_MON - bool "USB Monitor" - depends on USB!=n - default y + tristate "USB Monitor" + depends on USB + default y if USB=y + default m if USB=m help - If you say Y here, a component which captures the USB traffic + If you select this option, a component which captures the USB traffic between peripheral-specific drivers and HC drivers will be built. For more information, see <file:Documentation/usb/usbmon.txt>. - This is somewhat experimental at this time, but it should be safe. - - If unsure, say Y. + If unsure, say Y (if allowed), otherwise M. diff --git a/drivers/usb/mon/Makefile b/drivers/usb/mon/Makefile index 0f76ed5e1617..c6516b566731 100644 --- a/drivers/usb/mon/Makefile +++ b/drivers/usb/mon/Makefile @@ -4,5 +4,4 @@ usbmon-objs := mon_main.o mon_stat.o mon_text.o mon_bin.o mon_dma.o -# This does not use CONFIG_USB_MON because we want this to use a tristate. -obj-$(CONFIG_USB) += usbmon.o +obj-$(CONFIG_USB_MON) += usbmon.o diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c index dfb3bcbe00fc..0d566dc5ce06 100644 --- a/drivers/usb/musb/davinci.c +++ b/drivers/usb/musb/davinci.c @@ -32,9 +32,9 @@ #include <linux/io.h> #include <linux/gpio.h> -#include <asm/arch/hardware.h> -#include <asm/arch/memory.h> -#include <asm/arch/gpio.h> +#include <mach/arch/hardware.h> +#include <mach/arch/memory.h> +#include <mach/arch/gpio.h> #include <asm/mach-types.h> #include "musb_core.h" @@ -364,6 +364,18 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci) return IRQ_HANDLED; } +int musb_platform_set_mode(struct musb *musb, u8 mode) +{ + /* EVM can't do this (right?) */ + return -EIO; +} + +int musb_platform_set_mode(struct musb *musb, u8 mode) +{ + /* EVM can't do this (right?) */ + return -EIO; +} + int __init musb_platform_init(struct musb *musb) { void __iomem *tibase = musb->ctrl_base; diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index 5280dba9b1fb..83720f61fdba 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -1212,7 +1212,7 @@ static int __init ep_config_from_table(struct musb *musb) if (epn >= musb->config->num_eps) { pr_debug("%s: invalid ep %d\n", musb_driver_name, epn); - continue; + return -EINVAL; } offset = fifo_setup(musb, hw_ep + epn, cfg++, offset); if (offset < 0) { @@ -1671,17 +1671,20 @@ musb_mode_store(struct device *dev, struct device_attribute *attr, { struct musb *musb = dev_to_musb(dev); unsigned long flags; + int status; spin_lock_irqsave(&musb->lock, flags); - if (!strncmp(buf, "host", 4)) - musb_platform_set_mode(musb, MUSB_HOST); - if (!strncmp(buf, "peripheral", 10)) - musb_platform_set_mode(musb, MUSB_PERIPHERAL); - if (!strncmp(buf, "otg", 3)) - musb_platform_set_mode(musb, MUSB_OTG); + if (sysfs_streq(buf, "host")) + status = musb_platform_set_mode(musb, MUSB_HOST); + else if (sysfs_streq(buf, "peripheral")) + status = musb_platform_set_mode(musb, MUSB_PERIPHERAL); + else if (sysfs_streq(buf, "otg")) + status = musb_platform_set_mode(musb, MUSB_OTG); + else + status = -EINVAL; spin_unlock_irqrestore(&musb->lock, flags); - return n; + return (status == 0) ? n : status; } static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store); @@ -1781,7 +1784,7 @@ allocate_instance(struct device *dev, #ifdef CONFIG_USB_MUSB_HDRC_HCD struct usb_hcd *hcd; - hcd = usb_create_hcd(&musb_hc_driver, dev, dev->bus_id); + hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev)); if (!hcd) return NULL; /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */ @@ -1810,7 +1813,6 @@ allocate_instance(struct device *dev, for (epnum = 0, ep = musb->endpoints; epnum < musb->config->num_eps; epnum++, ep++) { - ep->musb = musb; ep->epnum = epnum; } @@ -1838,7 +1840,7 @@ static void musb_free(struct musb *musb) musb_gadget_cleanup(musb); #endif - if (musb->nIrq >= 0) { + if (musb->nIrq >= 0 && musb->irq_wake) { disable_irq_wake(musb->nIrq); free_irq(musb->nIrq, musb); } @@ -1984,15 +1986,19 @@ bad_config: INIT_WORK(&musb->irq_work, musb_irq_work); /* attach to the IRQ */ - if (request_irq(nIrq, musb->isr, 0, dev->bus_id, musb)) { + if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) { dev_err(dev, "request_irq %d failed!\n", nIrq); status = -ENODEV; goto fail2; } musb->nIrq = nIrq; /* FIXME this handles wakeup irqs wrong */ - if (enable_irq_wake(nIrq) == 0) + if (enable_irq_wake(nIrq) == 0) { + musb->irq_wake = 1; device_init_wakeup(dev, 1); + } else { + musb->irq_wake = 0; + } pr_info("%s: USB %s mode controller at %p using %s, IRQ %d\n", musb_driver_name, diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h index 82227251931b..d45d258e63f0 100644 --- a/drivers/usb/musb/musb_core.h +++ b/drivers/usb/musb/musb_core.h @@ -359,6 +359,7 @@ struct musb { struct otg_transceiver xceiv; int nIrq; + unsigned irq_wake:1; struct musb_hw_ep endpoints[MUSB_C_NUM_EPS]; #define control_ep endpoints @@ -467,7 +468,7 @@ extern void musb_platform_disable(struct musb *musb); extern void musb_hnp_stop(struct musb *musb); -extern void musb_platform_set_mode(struct musb *musb, u8 musb_mode); +extern int musb_platform_set_mode(struct musb *musb, u8 musb_mode); #if defined(CONFIG_USB_TUSB6010) || \ defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX) diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index d6a802c224fa..6197daeab8f9 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1633,7 +1633,7 @@ int __init musb_gadget_setup(struct musb *musb) musb->g.speed = USB_SPEED_UNKNOWN; /* this "gadget" abstracts/virtualizes the controller */ - strcpy(musb->g.dev.bus_id, "gadget"); + dev_set_name(&musb->g.dev, "gadget"); musb->g.dev.parent = musb->controller; musb->g.dev.dma_mask = musb->controller->dma_mask; musb->g.dev.release = musb_gadget_release; diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index cc64462d4c4e..bf25ef4cc151 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -112,18 +112,21 @@ static void musb_h_tx_flush_fifo(struct musb_hw_ep *ep) { void __iomem *epio = ep->regs; u16 csr; + u16 lastcsr = 0; int retries = 1000; csr = musb_readw(epio, MUSB_TXCSR); while (csr & MUSB_TXCSR_FIFONOTEMPTY) { - DBG(5, "Host TX FIFONOTEMPTY csr: %02x\n", csr); + if (csr != lastcsr) + DBG(3, "Host TX FIFONOTEMPTY csr: %02x\n", csr); + lastcsr = csr; csr |= MUSB_TXCSR_FLUSHFIFO; musb_writew(epio, MUSB_TXCSR, csr); csr = musb_readw(epio, MUSB_TXCSR); - if (retries-- < 1) { - ERR("Could not flush host TX fifo: csr: %04x\n", csr); + if (WARN(retries-- < 1, + "Could not flush host TX%d fifo: csr: %04x\n", + ep->epnum, csr)) return; - } mdelay(1); } } @@ -268,7 +271,7 @@ __musb_giveback(struct musb *musb, struct urb *urb, int status) __releases(musb->lock) __acquires(musb->lock) { - DBG(({ int level; switch (urb->status) { + DBG(({ int level; switch (status) { case 0: level = 4; break; @@ -283,8 +286,8 @@ __acquires(musb->lock) level = 2; break; }; level; }), - "complete %p (%d), dev%d ep%d%s, %d/%d\n", - urb, urb->status, + "complete %p %pF (%d), dev%d ep%d%s, %d/%d\n", + urb, urb->complete, status, usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe), usb_pipein(urb->pipe) ? "in" : "out", @@ -988,8 +991,10 @@ static bool musb_h_ep0_continue(struct musb *musb, u16 len, struct urb *urb) if (fifo_count) { fifo_dest = (u8 *) (urb->transfer_buffer + urb->actual_length); - DBG(3, "Sending %d bytes to %p\n", - fifo_count, fifo_dest); + DBG(3, "Sending %d byte%s to ep0 fifo %p\n", + fifo_count, + (fifo_count == 1) ? "" : "s", + fifo_dest); musb_write_fifo(hw_ep, fifo_count, fifo_dest); urb->actual_length += fifo_count; diff --git a/drivers/usb/musb/musbhsdma.c b/drivers/usb/musb/musbhsdma.c index 8c734ef2c1ed..d193b7849087 100644 --- a/drivers/usb/musb/musbhsdma.c +++ b/drivers/usb/musb/musbhsdma.c @@ -424,7 +424,7 @@ dma_controller_create(struct musb *musb, void __iomem *base) controller->controller.channel_abort = dma_channel_abort; if (request_irq(irq, dma_controller_irq, IRQF_DISABLED, - musb->controller->bus_id, &controller->controller)) { + dev_name(musb->controller), &controller->controller)) { dev_err(dev, "request_irq %d failed!\n", irq); dma_controller_destroy(&controller->controller); diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c index ce6c162920f7..901dffdf23b1 100644 --- a/drivers/usb/musb/omap2430.c +++ b/drivers/usb/musb/omap2430.c @@ -58,10 +58,10 @@ static void musb_do_idle(unsigned long _musb) #endif u8 devctl; - devctl = musb_readb(musb->mregs, MUSB_DEVCTL); - spin_lock_irqsave(&musb->lock, flags); + devctl = musb_readb(musb->mregs, MUSB_DEVCTL); + switch (musb->xceiv.state) { case OTG_STATE_A_WAIT_BCON: devctl &= ~MUSB_DEVCTL_SESSION; @@ -196,7 +196,7 @@ static int omap_set_power(struct otg_transceiver *x, unsigned mA) static int musb_platform_resume(struct musb *musb); -void musb_platform_set_mode(struct musb *musb, u8 musb_mode) +int musb_platform_set_mode(struct musb *musb, u8 musb_mode) { u8 devctl = musb_readb(musb->mregs, MUSB_DEVCTL); @@ -204,15 +204,24 @@ void musb_platform_set_mode(struct musb *musb, u8 musb_mode) musb_writeb(musb->mregs, MUSB_DEVCTL, devctl); switch (musb_mode) { +#ifdef CONFIG_USB_MUSB_HDRC_HCD case MUSB_HOST: otg_set_host(&musb->xceiv, musb->xceiv.host); break; +#endif +#ifdef CONFIG_USB_GADGET_MUSB_HDRC case MUSB_PERIPHERAL: otg_set_peripheral(&musb->xceiv, musb->xceiv.gadget); break; +#endif +#ifdef CONFIG_USB_MUSB_OTG case MUSB_OTG: break; +#endif + default: + return -EINVAL; } + return 0; } int __init musb_platform_init(struct musb *musb) diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c index ee8fca92a4ac..9e20fd070d71 100644 --- a/drivers/usb/musb/tusb6010.c +++ b/drivers/usb/musb/tusb6010.c @@ -598,7 +598,7 @@ static void tusb_source_power(struct musb *musb, int is_on) * and peripheral modes in non-OTG configurations by reconfiguring hardware * and then setting musb->board_mode. For now, only support OTG mode. */ -void musb_platform_set_mode(struct musb *musb, u8 musb_mode) +int musb_platform_set_mode(struct musb *musb, u8 musb_mode) { void __iomem *tbase = musb->ctrl_base; u32 otg_stat, phy_otg_ctrl, phy_otg_ena, dev_conf; @@ -641,7 +641,8 @@ void musb_platform_set_mode(struct musb *musb, u8 musb_mode) #endif default: - DBG(2, "Trying to set unknown mode %i\n", musb_mode); + DBG(2, "Trying to set mode %i\n", musb_mode); + return -EINVAL; } musb_writel(tbase, TUSB_PHY_OTG_CTRL, @@ -655,6 +656,8 @@ void musb_platform_set_mode(struct musb *musb, u8 musb_mode) !(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) INFO("Cannot be peripheral with mini-A cable " "otg_stat: %08x\n", otg_stat); + + return 0; } static inline unsigned long diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig new file mode 100644 index 000000000000..afe91bfea7f2 --- /dev/null +++ b/drivers/usb/otg/Kconfig @@ -0,0 +1,44 @@ +# +# USB OTG infrastructure may be needed for peripheral-only, host-only, +# or OTG-capable configurations when OTG transceivers or controllers +# are used. +# + +comment "OTG and related infrastructure" + +if USB || USB_GADGET + +config USB_OTG_UTILS + bool + help + Select this to make sure the build includes objects from + the OTG infrastructure directory. + +# +# USB Transceiver Drivers +# +config USB_GPIO_VBUS + tristate "GPIO based peripheral-only VBUS sensing 'transceiver'" + depends on GENERIC_GPIO + select USB_OTG_UTILS + help + Provides simple GPIO VBUS sensing for controllers with an + internal transceiver via the otg_transceiver interface, and + optionally control of a D+ pullup GPIO as well as a VBUS + current limit regulator. + +config ISP1301_OMAP + tristate "Philips ISP1301 with OMAP OTG" + depends on I2C && ARCH_OMAP_OTG + select USB_OTG_UTILS + 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 a full speed USB transceiver which is used in + products including H2, H3, and H4 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. + +endif # USB || OTG diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile new file mode 100644 index 000000000000..7ceefc676fcb --- /dev/null +++ b/drivers/usb/otg/Makefile @@ -0,0 +1,17 @@ +# +# OTG infrastructure and transceiver drivers +# + +# infrastructure +obj-$(CONFIG_USB_OTG_UTILS) += otg.o + +# transceiver drivers +obj-$(CONFIG_USB_GPIO_VBUS) += gpio_vbus.o +obj-$(CONFIG_ISP1301_OMAP) += isp1301_omap.o + +ifeq ($(CONFIG_USB_DEBUG),y) +EXTRA_CFLAGS += -DDEBUG +else ifeq ($(CONFIG_USB_GADGET_DEBUG),y) +EXTRA_CFLAGS += -DDEBUG +endif + diff --git a/drivers/usb/otg/gpio_vbus.c b/drivers/usb/otg/gpio_vbus.c new file mode 100644 index 000000000000..63a6036f04be --- /dev/null +++ b/drivers/usb/otg/gpio_vbus.c @@ -0,0 +1,335 @@ +/* + * gpio-vbus.c - simple GPIO VBUS sensing driver for B peripheral devices + * + * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.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. + */ + +#include <linux/kernel.h> +#include <linux/platform_device.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/usb.h> + +#include <linux/regulator/consumer.h> + +#include <linux/usb/gadget.h> +#include <linux/usb/gpio_vbus.h> +#include <linux/usb/otg.h> + + +/* + * A simple GPIO VBUS sensing driver for B peripheral only devices + * with internal transceivers. It can control a D+ pullup GPIO and + * a regulator to limit the current drawn from VBUS. + * + * Needs to be loaded before the UDC driver that will use it. + */ +struct gpio_vbus_data { + struct otg_transceiver otg; + struct device *dev; + struct regulator *vbus_draw; + int vbus_draw_enabled; + unsigned mA; +}; + + +/* + * This driver relies on "both edges" triggering. VBUS has 100 msec to + * stabilize, so the peripheral controller driver may need to cope with + * some bouncing due to current surges (e.g. charging local capacitance) + * and contact chatter. + * + * REVISIT in desperate straits, toggling between rising and falling + * edges might be workable. + */ +#define VBUS_IRQ_FLAGS \ + ( IRQF_SAMPLE_RANDOM | IRQF_SHARED \ + | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING ) + + +/* interface to regulator framework */ +static void set_vbus_draw(struct gpio_vbus_data *gpio_vbus, unsigned mA) +{ + struct regulator *vbus_draw = gpio_vbus->vbus_draw; + int enabled; + + if (!vbus_draw) + return; + + enabled = gpio_vbus->vbus_draw_enabled; + if (mA) { + regulator_set_current_limit(vbus_draw, 0, 1000 * mA); + if (!enabled) { + regulator_enable(vbus_draw); + gpio_vbus->vbus_draw_enabled = 1; + } + } else { + if (enabled) { + regulator_disable(vbus_draw); + gpio_vbus->vbus_draw_enabled = 0; + } + } + gpio_vbus->mA = mA; +} + +/* VBUS change IRQ handler */ +static irqreturn_t gpio_vbus_irq(int irq, void *data) +{ + struct platform_device *pdev = data; + struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data; + struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); + int gpio, vbus; + + vbus = gpio_get_value(pdata->gpio_vbus); + if (pdata->gpio_vbus_inverted) + vbus = !vbus; + + dev_dbg(&pdev->dev, "VBUS %s (gadget: %s)\n", + vbus ? "supplied" : "inactive", + gpio_vbus->otg.gadget ? gpio_vbus->otg.gadget->name : "none"); + + if (!gpio_vbus->otg.gadget) + return IRQ_HANDLED; + + /* Peripheral controllers which manage the pullup themselves won't have + * gpio_pullup configured here. If it's configured here, we'll do what + * isp1301_omap::b_peripheral() does and enable the pullup here... although + * that may complicate usb_gadget_{,dis}connect() support. + */ + gpio = pdata->gpio_pullup; + if (vbus) { + gpio_vbus->otg.state = OTG_STATE_B_PERIPHERAL; + usb_gadget_vbus_connect(gpio_vbus->otg.gadget); + + /* drawing a "unit load" is *always* OK, except for OTG */ + set_vbus_draw(gpio_vbus, 100); + + /* optionally enable D+ pullup */ + if (gpio_is_valid(gpio)) + gpio_set_value(gpio, !pdata->gpio_pullup_inverted); + } else { + /* optionally disable D+ pullup */ + if (gpio_is_valid(gpio)) + gpio_set_value(gpio, pdata->gpio_pullup_inverted); + + set_vbus_draw(gpio_vbus, 0); + + usb_gadget_vbus_disconnect(gpio_vbus->otg.gadget); + gpio_vbus->otg.state = OTG_STATE_B_IDLE; + } + + return IRQ_HANDLED; +} + +/* OTG transceiver interface */ + +/* bind/unbind the peripheral controller */ +static int gpio_vbus_set_peripheral(struct otg_transceiver *otg, + struct usb_gadget *gadget) +{ + struct gpio_vbus_data *gpio_vbus; + struct gpio_vbus_mach_info *pdata; + struct platform_device *pdev; + int gpio, irq; + + gpio_vbus = container_of(otg, struct gpio_vbus_data, otg); + pdev = to_platform_device(gpio_vbus->dev); + pdata = gpio_vbus->dev->platform_data; + irq = gpio_to_irq(pdata->gpio_vbus); + gpio = pdata->gpio_pullup; + + if (!gadget) { + dev_dbg(&pdev->dev, "unregistering gadget '%s'\n", + otg->gadget->name); + + /* optionally disable D+ pullup */ + if (gpio_is_valid(gpio)) + gpio_set_value(gpio, pdata->gpio_pullup_inverted); + + set_vbus_draw(gpio_vbus, 0); + + usb_gadget_vbus_disconnect(otg->gadget); + otg->state = OTG_STATE_UNDEFINED; + + otg->gadget = NULL; + return 0; + } + + otg->gadget = gadget; + dev_dbg(&pdev->dev, "registered gadget '%s'\n", gadget->name); + + /* initialize connection state */ + gpio_vbus_irq(irq, pdev); + return 0; +} + +/* effective for B devices, ignored for A-peripheral */ +static int gpio_vbus_set_power(struct otg_transceiver *otg, unsigned mA) +{ + struct gpio_vbus_data *gpio_vbus; + + gpio_vbus = container_of(otg, struct gpio_vbus_data, otg); + + if (otg->state == OTG_STATE_B_PERIPHERAL) + set_vbus_draw(gpio_vbus, mA); + return 0; +} + +/* for non-OTG B devices: set/clear transceiver suspend mode */ +static int gpio_vbus_set_suspend(struct otg_transceiver *otg, int suspend) +{ + struct gpio_vbus_data *gpio_vbus; + + gpio_vbus = container_of(otg, struct gpio_vbus_data, otg); + + /* draw max 0 mA from vbus in suspend mode; or the previously + * recorded amount of current if not suspended + * + * NOTE: high powered configs (mA > 100) may draw up to 2.5 mA + * if they're wake-enabled ... we don't handle that yet. + */ + return gpio_vbus_set_power(otg, suspend ? 0 : gpio_vbus->mA); +} + +/* platform driver interface */ + +static int __init gpio_vbus_probe(struct platform_device *pdev) +{ + struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data; + struct gpio_vbus_data *gpio_vbus; + struct resource *res; + int err, gpio, irq; + + if (!pdata || !gpio_is_valid(pdata->gpio_vbus)) + return -EINVAL; + gpio = pdata->gpio_vbus; + + gpio_vbus = kzalloc(sizeof(struct gpio_vbus_data), GFP_KERNEL); + if (!gpio_vbus) + return -ENOMEM; + + platform_set_drvdata(pdev, gpio_vbus); + gpio_vbus->dev = &pdev->dev; + gpio_vbus->otg.label = "gpio-vbus"; + gpio_vbus->otg.state = OTG_STATE_UNDEFINED; + gpio_vbus->otg.set_peripheral = gpio_vbus_set_peripheral; + gpio_vbus->otg.set_power = gpio_vbus_set_power; + gpio_vbus->otg.set_suspend = gpio_vbus_set_suspend; + + err = gpio_request(gpio, "vbus_detect"); + if (err) { + dev_err(&pdev->dev, "can't request vbus gpio %d, err: %d\n", + gpio, err); + goto err_gpio; + } + gpio_direction_input(gpio); + + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (res) { + irq = res->start; + res->flags &= IRQF_TRIGGER_MASK; + res->flags |= IRQF_SAMPLE_RANDOM | IRQF_SHARED; + } else + irq = gpio_to_irq(gpio); + + /* if data line pullup is in use, initialize it to "not pulling up" */ + gpio = pdata->gpio_pullup; + if (gpio_is_valid(gpio)) { + err = gpio_request(gpio, "udc_pullup"); + if (err) { + dev_err(&pdev->dev, + "can't request pullup gpio %d, err: %d\n", + gpio, err); + gpio_free(pdata->gpio_vbus); + goto err_gpio; + } + gpio_direction_output(gpio, pdata->gpio_pullup_inverted); + } + + err = request_irq(irq, gpio_vbus_irq, VBUS_IRQ_FLAGS, + "vbus_detect", pdev); + if (err) { + dev_err(&pdev->dev, "can't request irq %i, err: %d\n", + irq, err); + goto err_irq; + } + + /* only active when a gadget is registered */ + err = otg_set_transceiver(&gpio_vbus->otg); + if (err) { + dev_err(&pdev->dev, "can't register transceiver, err: %d\n", + err); + goto err_otg; + } + + gpio_vbus->vbus_draw = regulator_get(&pdev->dev, "vbus_draw"); + if (IS_ERR(gpio_vbus->vbus_draw)) { + dev_dbg(&pdev->dev, "can't get vbus_draw regulator, err: %ld\n", + PTR_ERR(gpio_vbus->vbus_draw)); + gpio_vbus->vbus_draw = NULL; + } + + return 0; +err_otg: + free_irq(irq, &pdev->dev); +err_irq: + if (gpio_is_valid(pdata->gpio_pullup)) + gpio_free(pdata->gpio_pullup); + gpio_free(pdata->gpio_vbus); +err_gpio: + platform_set_drvdata(pdev, NULL); + kfree(gpio_vbus); + return err; +} + +static int __exit gpio_vbus_remove(struct platform_device *pdev) +{ + struct gpio_vbus_data *gpio_vbus = platform_get_drvdata(pdev); + struct gpio_vbus_mach_info *pdata = pdev->dev.platform_data; + int gpio = pdata->gpio_vbus; + + regulator_put(gpio_vbus->vbus_draw); + + otg_set_transceiver(NULL); + + free_irq(gpio_to_irq(gpio), &pdev->dev); + if (gpio_is_valid(pdata->gpio_pullup)) + gpio_free(pdata->gpio_pullup); + gpio_free(gpio); + platform_set_drvdata(pdev, NULL); + kfree(gpio_vbus); + + return 0; +} + +/* NOTE: the gpio-vbus device may *NOT* be hotplugged */ + +MODULE_ALIAS("platform:gpio-vbus"); + +static struct platform_driver gpio_vbus_driver = { + .driver = { + .name = "gpio-vbus", + .owner = THIS_MODULE, + }, + .remove = __exit_p(gpio_vbus_remove), +}; + +static int __init gpio_vbus_init(void) +{ + return platform_driver_probe(&gpio_vbus_driver, gpio_vbus_probe); +} +module_init(gpio_vbus_init); + +static void __exit gpio_vbus_exit(void) +{ + platform_driver_unregister(&gpio_vbus_driver); +} +module_exit(gpio_vbus_exit); + +MODULE_DESCRIPTION("simple GPIO controlled OTG transceiver driver"); +MODULE_AUTHOR("Philipp Zabel"); +MODULE_LICENSE("GPL"); diff --git a/drivers/i2c/chips/isp1301_omap.c b/drivers/usb/otg/isp1301_omap.c index e0d56ef2bcb0..e0d56ef2bcb0 100644 --- a/drivers/i2c/chips/isp1301_omap.c +++ b/drivers/usb/otg/isp1301_omap.c diff --git a/drivers/usb/otg/otg.c b/drivers/usb/otg/otg.c new file mode 100644 index 000000000000..019d775291d1 --- /dev/null +++ b/drivers/usb/otg/otg.c @@ -0,0 +1,59 @@ +/* + * otg.c -- USB OTG utility code + * + * Copyright (C) 2004 Texas Instruments + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/device.h> + +#include <linux/usb/otg.h> + +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 + * calling otg_put_transceiver() to release that count. + */ +struct otg_transceiver *otg_get_transceiver(void) +{ + if (xceiv) + get_device(xceiv->dev); + return xceiv; +} +EXPORT_SYMBOL(otg_get_transceiver); + +/** + * otg_put_transceiver - release the (single) OTG transceiver driver + * @x: the transceiver returned by otg_get_transceiver() + * + * Releases a refcount the caller received from otg_get_transceiver(). + */ +void otg_put_transceiver(struct otg_transceiver *x) +{ + put_device(x->dev); +} +EXPORT_SYMBOL(otg_put_transceiver); + +/** + * otg_set_transceiver - release the (single) OTG transceiver driver + * @x: the USB OTG transceiver to be used; or NULL + * + * This call is exclusively for use by transceiver drivers. + */ +int otg_set_transceiver(struct otg_transceiver *x) +{ + if (xceiv && x) + return -EBUSY; + xceiv = x; + return 0; +} +EXPORT_SYMBOL(otg_set_transceiver); diff --git a/drivers/usb/serial/Kconfig b/drivers/usb/serial/Kconfig index 70338f4ec918..da30784a0ef2 100644 --- a/drivers/usb/serial/Kconfig +++ b/drivers/usb/serial/Kconfig @@ -565,6 +565,15 @@ config USB_SERIAL_OMNINET To compile this driver as a module, choose M here: the module will be called omninet. +config USB_SERIAL_OPTICON + tristate "USB Opticon Barcode driver (serial mode)" + help + Say Y here if you want to use a Opticon USB Barcode device + in serial emulation mode. + + To compile this driver as a module, choose M here: the + module will be called opticon. + config USB_SERIAL_DEBUG tristate "USB Debugging Device" help diff --git a/drivers/usb/serial/Makefile b/drivers/usb/serial/Makefile index 6047f818adfe..9a4f59e0ee5f 100644 --- a/drivers/usb/serial/Makefile +++ b/drivers/usb/serial/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_USB_SERIAL_MOS7840) += mos7840.o obj-$(CONFIG_USB_SERIAL_MOTOROLA) += moto_modem.o obj-$(CONFIG_USB_SERIAL_NAVMAN) += navman.o obj-$(CONFIG_USB_SERIAL_OMNINET) += omninet.o +obj-$(CONFIG_USB_SERIAL_OPTICON) += opticon.o obj-$(CONFIG_USB_SERIAL_OPTION) += option.o obj-$(CONFIG_USB_SERIAL_OTI6858) += oti6858.o obj-$(CONFIG_USB_SERIAL_PL2303) += pl2303.o diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c index 3ac59a8a980f..f530032ed93d 100644 --- a/drivers/usb/serial/ipw.c +++ b/drivers/usb/serial/ipw.c @@ -473,7 +473,7 @@ static struct usb_serial_driver ipw_device = { -static int usb_ipw_init(void) +static int __init usb_ipw_init(void) { int retval; @@ -490,7 +490,7 @@ static int usb_ipw_init(void) return 0; } -static void usb_ipw_exit(void) +static void __exit usb_ipw_exit(void) { usb_deregister(&usb_ipw_driver); usb_serial_deregister(&ipw_device); diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c new file mode 100644 index 000000000000..cea326f1f105 --- /dev/null +++ b/drivers/usb/serial/opticon.c @@ -0,0 +1,358 @@ +/* + * Opticon USB barcode to serial driver + * + * Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de> + * Copyright (C) 2008 Novell Inc. + * + * 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. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/tty.h> +#include <linux/tty_driver.h> +#include <linux/tty_flip.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/usb/serial.h> +#include <linux/uaccess.h> + +static int debug; + +static struct usb_device_id id_table[] = { + { USB_DEVICE(0x065a, 0x0009) }, + { }, +}; +MODULE_DEVICE_TABLE(usb, id_table); + +/* This structure holds all of the individual device information */ +struct opticon_private { + struct usb_device *udev; + struct usb_serial *serial; + struct usb_serial_port *port; + unsigned char *bulk_in_buffer; + struct urb *bulk_read_urb; + int buffer_size; + u8 bulk_address; + spinlock_t lock; /* protects the following flags */ + bool throttled; + bool actually_throttled; + bool rts; +}; + +static void opticon_bulk_callback(struct urb *urb) +{ + struct opticon_private *priv = urb->context; + unsigned char *data = urb->transfer_buffer; + struct usb_serial_port *port = priv->port; + int status = urb->status; + struct tty_struct *tty; + int result; + int available_room = 0; + int data_length; + + dbg("%s - port %d", __func__, port->number); + + switch (status) { + case 0: + /* success */ + break; + case -ECONNRESET: + case -ENOENT: + case -ESHUTDOWN: + /* this urb is terminated, clean up */ + dbg("%s - urb shutting down with status: %d", + __func__, status); + return; + default: + dbg("%s - nonzero urb status received: %d", + __func__, status); + goto exit; + } + + usb_serial_debug_data(debug, &port->dev, __func__, urb->actual_length, + data); + + if (urb->actual_length > 2) { + data_length = urb->actual_length - 2; + + /* + * Data from the device comes with a 2 byte header: + * + * <0x00><0x00>data... + * This is real data to be sent to the tty layer + * <0x00><0x01)level + * This is a RTS level change, the third byte is the RTS + * value (0 for low, 1 for high). + */ + if ((data[0] == 0x00) && (data[1] == 0x00)) { + /* real data, send it to the tty layer */ + tty = tty_port_tty_get(&port->port); + if (tty) { + available_room = tty_buffer_request_room(tty, + data_length); + if (available_room) { + tty_insert_flip_string(tty, data, + available_room); + tty_flip_buffer_push(tty); + } + tty_kref_put(tty); + } + } else { + if ((data[0] == 0x00) && (data[1] == 0x01)) { + if (data[2] == 0x00) + priv->rts = false; + else + priv->rts = true; + /* FIXME change the RTS level */ + } else { + dev_dbg(&priv->udev->dev, + "Unknown data packet received from the device:" + " %2x %2x\n", + data[0], data[1]); + } + } + } else { + dev_dbg(&priv->udev->dev, + "Improper ammount of data received from the device, " + "%d bytes", urb->actual_length); + } + +exit: + spin_lock(&priv->lock); + + /* Continue trying to always read if we should */ + if (!priv->throttled) { + usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, + usb_rcvbulkpipe(priv->udev, + priv->bulk_address), + priv->bulk_in_buffer, priv->buffer_size, + opticon_bulk_callback, priv); + result = usb_submit_urb(port->read_urb, GFP_ATOMIC); + if (result) + dev_err(&port->dev, + "%s - failed resubmitting read urb, error %d\n", + __func__, result); + } else + priv->actually_throttled = true; + spin_unlock(&priv->lock); +} + +static int opticon_open(struct tty_struct *tty, struct usb_serial_port *port, + struct file *filp) +{ + struct opticon_private *priv = usb_get_serial_data(port->serial); + unsigned long flags; + int result = 0; + + dbg("%s - port %d", __func__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + priv->throttled = false; + priv->actually_throttled = false; + priv->port = port; + spin_unlock_irqrestore(&priv->lock, flags); + + /* + * Force low_latency on so that our tty_push actually forces the data + * through, otherwise it is scheduled, and with high data rates (like + * with OHCI) data can get lost. + */ + if (tty) + tty->low_latency = 1; + + /* Start reading from the device */ + usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, + usb_rcvbulkpipe(priv->udev, + priv->bulk_address), + priv->bulk_in_buffer, priv->buffer_size, + opticon_bulk_callback, priv); + result = usb_submit_urb(priv->bulk_read_urb, GFP_KERNEL); + if (result) + dev_err(&port->dev, + "%s - failed resubmitting read urb, error %d\n", + __func__, result); + return result; +} + +static void opticon_close(struct tty_struct *tty, struct usb_serial_port *port, + struct file *filp) +{ + struct opticon_private *priv = usb_get_serial_data(port->serial); + + dbg("%s - port %d", __func__, port->number); + + /* shutdown our urbs */ + usb_kill_urb(priv->bulk_read_urb); +} + +static void opticon_throttle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct opticon_private *priv = usb_get_serial_data(port->serial); + unsigned long flags; + + dbg("%s - port %d", __func__, port->number); + spin_lock_irqsave(&priv->lock, flags); + priv->throttled = true; + spin_unlock_irqrestore(&priv->lock, flags); +} + + +static void opticon_unthrottle(struct tty_struct *tty) +{ + struct usb_serial_port *port = tty->driver_data; + struct opticon_private *priv = usb_get_serial_data(port->serial); + unsigned long flags; + int result; + + dbg("%s - port %d", __func__, port->number); + + spin_lock_irqsave(&priv->lock, flags); + priv->throttled = false; + priv->actually_throttled = false; + spin_unlock_irqrestore(&priv->lock, flags); + + priv->bulk_read_urb->dev = port->serial->dev; + result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC); + if (result) + dev_err(&port->dev, + "%s - failed submitting read urb, error %d\n", + __func__, result); +} + +static int opticon_startup(struct usb_serial *serial) +{ + struct opticon_private *priv; + struct usb_host_interface *intf; + int i; + int retval = -ENOMEM; + bool bulk_in_found = false; + + /* create our private serial structure */ + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (priv == NULL) { + dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__); + return -ENOMEM; + } + spin_lock_init(&priv->lock); + priv->serial = serial; + priv->port = serial->port[0]; + priv->udev = serial->dev; + + /* find our bulk endpoint */ + intf = serial->interface->altsetting; + for (i = 0; i < intf->desc.bNumEndpoints; ++i) { + struct usb_endpoint_descriptor *endpoint; + + endpoint = &intf->endpoint[i].desc; + if (!usb_endpoint_is_bulk_in(endpoint)) + continue; + + priv->bulk_read_urb = usb_alloc_urb(0, GFP_KERNEL); + if (!priv->bulk_read_urb) { + dev_err(&priv->udev->dev, "out of memory\n"); + goto error; + } + + priv->buffer_size = le16_to_cpu(endpoint->wMaxPacketSize) * 2; + priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL); + if (!priv->bulk_in_buffer) { + dev_err(&priv->udev->dev, "out of memory\n"); + goto error; + } + + priv->bulk_address = endpoint->bEndpointAddress; + + /* set up our bulk urb */ + usb_fill_bulk_urb(priv->bulk_read_urb, priv->udev, + usb_rcvbulkpipe(priv->udev, + endpoint->bEndpointAddress), + priv->bulk_in_buffer, priv->buffer_size, + opticon_bulk_callback, priv); + + bulk_in_found = true; + break; + } + + if (!bulk_in_found) { + dev_err(&priv->udev->dev, + "Error - the proper endpoints were not found!\n"); + goto error; + } + + usb_set_serial_data(serial, priv); + return 0; + +error: + usb_free_urb(priv->bulk_read_urb); + kfree(priv->bulk_in_buffer); + kfree(priv); + return retval; +} + +static void opticon_shutdown(struct usb_serial *serial) +{ + struct opticon_private *priv = usb_get_serial_data(serial); + + dbg("%s", __func__); + + usb_kill_urb(priv->bulk_read_urb); + usb_free_urb(priv->bulk_read_urb); + kfree(priv->bulk_in_buffer); + kfree(priv); + usb_set_serial_data(serial, NULL); +} + + +static struct usb_driver opticon_driver = { + .name = "opticon", + .probe = usb_serial_probe, + .disconnect = usb_serial_disconnect, + .id_table = id_table, + .no_dynamic_id = 1, +}; + +static struct usb_serial_driver opticon_device = { + .driver = { + .owner = THIS_MODULE, + .name = "opticon", + }, + .id_table = id_table, + .usb_driver = &opticon_driver, + .num_ports = 1, + .attach = opticon_startup, + .open = opticon_open, + .close = opticon_close, + .shutdown = opticon_shutdown, + .throttle = opticon_throttle, + .unthrottle = opticon_unthrottle, +}; + +static int __init opticon_init(void) +{ + int retval; + + retval = usb_serial_register(&opticon_device); + if (retval) + return retval; + retval = usb_register(&opticon_driver); + if (retval) + usb_serial_deregister(&opticon_device); + return retval; +} + +static void __exit opticon_exit(void) +{ + usb_deregister(&opticon_driver); + usb_serial_deregister(&opticon_device); +} + +module_init(opticon_init); +module_exit(opticon_exit); +MODULE_LICENSE("GPL"); + +module_param(debug, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(debug, "Debug enabled or not"); diff --git a/drivers/usb/storage/protocol.c b/drivers/usb/storage/protocol.c index 3b3357e20ea7..be441d84bc64 100644 --- a/drivers/usb/storage/protocol.c +++ b/drivers/usb/storage/protocol.c @@ -56,9 +56,9 @@ * Protocol routines ***********************************************************************/ -void usb_stor_qic157_command(struct scsi_cmnd *srb, struct us_data *us) +void usb_stor_pad12_command(struct scsi_cmnd *srb, struct us_data *us) { - /* Pad the ATAPI command with zeros + /* Pad the SCSI command with zeros out to 12 bytes * * NOTE: This only works because a scsi_cmnd struct field contains * a unsigned char cmnd[16], so we know we have storage available @@ -73,26 +73,6 @@ void usb_stor_qic157_command(struct scsi_cmnd *srb, struct us_data *us) usb_stor_invoke_transport(srb, us); } -void usb_stor_ATAPI_command(struct scsi_cmnd *srb, struct us_data *us) -{ - /* Pad the ATAPI command with zeros - * - * NOTE: This only works because a scsi_cmnd struct field contains - * a unsigned char cmnd[16], so we know we have storage available - */ - - /* Pad the ATAPI command with zeros */ - for (; srb->cmd_len<12; srb->cmd_len++) - srb->cmnd[srb->cmd_len] = 0; - - /* set command length to 12 bytes */ - srb->cmd_len = 12; - - /* send the command to the transport layer */ - usb_stor_invoke_transport(srb, us); -} - - void usb_stor_ufi_command(struct scsi_cmnd *srb, struct us_data *us) { /* fix some commands -- this is a form of mode translation diff --git a/drivers/usb/storage/protocol.h b/drivers/usb/storage/protocol.h index 487056ffb516..ffc3e2af0156 100644 --- a/drivers/usb/storage/protocol.h +++ b/drivers/usb/storage/protocol.h @@ -40,8 +40,7 @@ #define _PROTOCOL_H_ /* Protocol handling routines */ -extern void usb_stor_ATAPI_command(struct scsi_cmnd*, struct us_data*); -extern void usb_stor_qic157_command(struct scsi_cmnd*, struct us_data*); +extern void usb_stor_pad12_command(struct scsi_cmnd*, struct us_data*); extern void usb_stor_ufi_command(struct scsi_cmnd*, struct us_data*); extern void usb_stor_transparent_scsi_command(struct scsi_cmnd*, struct us_data*); diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 09779f6a8179..e9d6c196a7ab 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -129,6 +129,14 @@ static int slave_configure(struct scsi_device *sdev) max_sectors); } + /* Some USB host controllers can't do DMA; they have to use PIO. + * They indicate this by setting their dma_mask to NULL. For + * such controllers we need to make sure the block layer sets + * up bounce buffers in addressable memory. + */ + if (!us->pusb_dev->bus->controller->dma_mask) + blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); + /* We can't put these settings in slave_alloc() because that gets * called before the device type is known. Consequently these * settings can't be overridden via the scsi devinfo mechanism. */ @@ -170,6 +178,10 @@ static int slave_configure(struct scsi_device *sdev) if (us->fflags & US_FL_CAPACITY_HEURISTICS) sdev->guess_capacity = 1; + /* assume SPC3 or latter devices support sense size > 18 */ + if (sdev->scsi_level > SCSI_SPC_2) + us->fflags |= US_FL_SANE_SENSE; + /* Some devices report a SCSI revision level above 2 but are * unable to handle the REPORT LUNS command (for which * support is mandatory at level 3). Since we already have diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index 79108d5d3171..9cc30afd6d31 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -579,6 +579,20 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) } /* + * Determine if this device is SAT by seeing if the + * command executed successfully. Otherwise we'll have + * to wait for at least one CHECK_CONDITION to determine + * SANE_SENSE support + */ + if ((srb->cmnd[0] == ATA_16 || srb->cmnd[0] == ATA_12) && + result == USB_STOR_TRANSPORT_GOOD && + !(us->fflags & US_FL_SANE_SENSE) && + !(srb->cmnd[2] & 0x20)) { + US_DEBUGP("-- SAT supported, increasing auto-sense\n"); + us->fflags |= US_FL_SANE_SENSE; + } + + /* * A short transfer on a command where we don't expect it * is unusual, but it doesn't mean we need to auto-sense. */ @@ -595,10 +609,15 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) if (need_auto_sense) { int temp_result; struct scsi_eh_save ses; + int sense_size = US_SENSE_SIZE; + + /* device supports and needs bigger sense buffer */ + if (us->fflags & US_FL_SANE_SENSE) + sense_size = ~0; US_DEBUGP("Issuing auto-REQUEST_SENSE\n"); - scsi_eh_prep_cmnd(srb, &ses, NULL, 0, US_SENSE_SIZE); + scsi_eh_prep_cmnd(srb, &ses, NULL, 0, sense_size); /* FIXME: we must do the protocol translation here */ if (us->subclass == US_SC_RBC || us->subclass == US_SC_SCSI || @@ -632,6 +651,25 @@ void usb_stor_invoke_transport(struct scsi_cmnd *srb, struct us_data *us) return; } + /* If the sense data returned is larger than 18-bytes then we + * assume this device supports requesting more in the future. + * The response code must be 70h through 73h inclusive. + */ + if (srb->sense_buffer[7] > (US_SENSE_SIZE - 8) && + !(us->fflags & US_FL_SANE_SENSE) && + (srb->sense_buffer[0] & 0x7C) == 0x70) { + US_DEBUGP("-- SANE_SENSE support enabled\n"); + us->fflags |= US_FL_SANE_SENSE; + + /* Indicate to the user that we truncated their sense + * because we didn't know it supported larger sense. + */ + US_DEBUGP("-- Sense data truncated to %i from %i\n", + US_SENSE_SIZE, + srb->sense_buffer[7] + 8); + srb->sense_buffer[7] = (US_SENSE_SIZE - 8); + } + US_DEBUGP("-- Result from auto-sense is %d\n", temp_result); US_DEBUGP("-- code: 0x%x, key: 0x%x, ASC: 0x%x, ASCQ: 0x%x\n", srb->sense_buffer[0], @@ -718,10 +756,10 @@ void usb_stor_stop_transport(struct us_data *us) } /* - * Control/Bulk/Interrupt transport + * Control/Bulk and Control/Bulk/Interrupt transport */ -int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us) +int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us) { unsigned int transfer_length = scsi_bufflen(srb); unsigned int pipe = 0; @@ -763,6 +801,13 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us) } /* STATUS STAGE */ + + /* NOTE: CB does not have a status stage. Silly, I know. So + * we have to catch this at a higher level. + */ + if (us->protocol != US_PR_CBI) + return USB_STOR_TRANSPORT_GOOD; + result = usb_stor_intr_transfer(us, us->iobuf, 2); US_DEBUGP("Got interrupt data (0x%x, 0x%x)\n", us->iobuf[0], us->iobuf[1]); @@ -817,56 +862,6 @@ int usb_stor_CBI_transport(struct scsi_cmnd *srb, struct us_data *us) } /* - * Control/Bulk transport - */ -int usb_stor_CB_transport(struct scsi_cmnd *srb, struct us_data *us) -{ - unsigned int transfer_length = scsi_bufflen(srb); - int result; - - /* COMMAND STAGE */ - /* let's send the command via the control pipe */ - result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe, - US_CBI_ADSC, - USB_TYPE_CLASS | USB_RECIP_INTERFACE, 0, - us->ifnum, srb->cmnd, srb->cmd_len); - - /* check the return code for the command */ - US_DEBUGP("Call to usb_stor_ctrl_transfer() returned %d\n", result); - - /* if we stalled the command, it means command failed */ - if (result == USB_STOR_XFER_STALLED) { - return USB_STOR_TRANSPORT_FAILED; - } - - /* Uh oh... serious problem here */ - if (result != USB_STOR_XFER_GOOD) { - return USB_STOR_TRANSPORT_ERROR; - } - - /* DATA STAGE */ - /* transfer the data payload for this command, if one exists*/ - if (transfer_length) { - unsigned int pipe = srb->sc_data_direction == DMA_FROM_DEVICE ? - us->recv_bulk_pipe : us->send_bulk_pipe; - result = usb_stor_bulk_srb(us, pipe, srb); - US_DEBUGP("CB data stage result is 0x%x\n", result); - - /* if we stalled the data transfer it means command failed */ - if (result == USB_STOR_XFER_STALLED) - return USB_STOR_TRANSPORT_FAILED; - if (result > USB_STOR_XFER_STALLED) - return USB_STOR_TRANSPORT_ERROR; - } - - /* STATUS STAGE */ - /* NOTE: CB does not have a status stage. Silly, I know. So - * we have to catch this at a higher level. - */ - return USB_STOR_TRANSPORT_GOOD; -} - -/* * Bulk only transport */ @@ -1173,10 +1168,9 @@ int usb_stor_Bulk_reset(struct us_data *us) */ int usb_stor_port_reset(struct us_data *us) { - int result, rc_lock; + int result; - result = rc_lock = - usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf); + result = usb_lock_device_for_reset(us->pusb_dev, us->pusb_intf); if (result < 0) US_DEBUGP("unable to lock device for reset: %d\n", result); else { @@ -1189,8 +1183,7 @@ int usb_stor_port_reset(struct us_data *us) US_DEBUGP("usb_reset_device returns %d\n", result); } - if (rc_lock) - usb_unlock_device(us->pusb_dev); + usb_unlock_device(us->pusb_dev); } return result; } diff --git a/drivers/usb/storage/transport.h b/drivers/usb/storage/transport.h index e70b88182f0e..242ff5e791a5 100644 --- a/drivers/usb/storage/transport.h +++ b/drivers/usb/storage/transport.h @@ -113,8 +113,6 @@ struct bulk_cs_wrap { #define US_CBI_ADSC 0 -extern int usb_stor_CBI_transport(struct scsi_cmnd *, struct us_data*); - extern int usb_stor_CB_transport(struct scsi_cmnd *, struct us_data*); extern int usb_stor_CB_reset(struct us_data*); diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index e61f2bfc64ad..b964ed590212 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -85,6 +85,13 @@ UNUSUAL_DEV( 0x03f0, 0x0307, 0x0001, 0x0001, US_SC_8070, US_PR_USBAT, init_usbat_cd, 0), #endif +/* Reported by Ben Efros <ben@pc-doctor.com> */ +UNUSUAL_DEV( 0x03f0, 0x070c, 0x0000, 0x0000, + "HP", + "Personal Media Drive", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SANE_SENSE ), + /* Reported by Grant Grundler <grundler@parisc-linux.org> * HP r707 camera in "Disk" mode with 2.00.23 or 2.00.24 firmware. */ @@ -174,6 +181,14 @@ UNUSUAL_DEV( 0x0421, 0x006a, 0x0000, 0x0591, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_CAPACITY ), +/* Submitted by Ricky Wong Yung Fei <evilbladewarrior@gmail.com> */ +/* Nokia 7610 Supernova - Too many sectors reported in usb storage mode */ +UNUSUAL_DEV( 0x0421, 0x00f5, 0x0000, 0x0470, + "Nokia", + "7610 Supernova", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_FIX_CAPACITY ), + /* Reported by Mario Rettig <mariorettig@web.de> */ UNUSUAL_DEV( 0x0421, 0x042e, 0x0100, 0x0100, "Nokia", @@ -253,21 +268,6 @@ UNUSUAL_DEV( 0x0421, 0x04fa, 0x0550, 0x0660, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_CAPACITY ), -/* Patch for Nokia 5310 capacity */ -UNUSUAL_DEV( 0x0421, 0x006a, 0x0000, 0x0591, - "Nokia", - "5310", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_FIX_CAPACITY ), - -/* Submitted by Ricky Wong Yung Fei <evilbladewarrior@gmail.com> */ -/* Nokia 7610 Supernova - Too many sectors reported in usb storage mode */ -UNUSUAL_DEV( 0x0421, 0x00f5, 0x0000, 0x0470, - "Nokia", - "7610 Supernova", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_FIX_CAPACITY ), - /* Reported by Olaf Hering <olh@suse.de> from novell bug #105878 */ UNUSUAL_DEV( 0x0424, 0x0fdc, 0x0210, 0x0210, "SMSC", @@ -374,6 +374,15 @@ UNUSUAL_DEV( 0x04a4, 0x0004, 0x0001, 0x0001, "DVD-CAM DZ-MV100A Camcorder", US_SC_SCSI, US_PR_CB, NULL, US_FL_SINGLE_LUN), +/* BENQ DC5330 + * Reported by Manuel Fombuena <mfombuena@ya.com> and + * Frank Copeland <fjc@thingy.apana.org.au> */ +UNUSUAL_DEV( 0x04a5, 0x3010, 0x0100, 0x0100, + "Tekom Technologies, Inc", + "300_CAMERA", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_IGNORE_RESIDUE ), + /* Patch for Nikon coolpix 2000 * Submitted by Fabien Cosse <fabien.cosse@wanadoo.fr>*/ UNUSUAL_DEV( 0x04b0, 0x0301, 0x0010, 0x0010, @@ -466,15 +475,6 @@ UNUSUAL_DEV( 0x04b3, 0x4001, 0x0110, 0x0110, US_SC_DEVICE, US_PR_CB, NULL, US_FL_MAX_SECTORS_MIN), -/* BENQ DC5330 - * Reported by Manuel Fombuena <mfombuena@ya.com> and - * Frank Copeland <fjc@thingy.apana.org.au> */ -UNUSUAL_DEV( 0x04a5, 0x3010, 0x0100, 0x0100, - "Tekom Technologies, Inc", - "300_CAMERA", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_IGNORE_RESIDUE ), - #ifdef CONFIG_USB_STORAGE_CYPRESS_ATACB /* CY7C68300 : support atacb */ UNUSUAL_DEV( 0x04b4, 0x6830, 0x0000, 0x9999, @@ -793,15 +793,15 @@ UNUSUAL_DEV( 0x054c, 0x006d, 0x0000, 0x9999, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_INQUIRY ), -/* Submitted by Mike Alborn <malborn@deandra.homeip.net> */ -UNUSUAL_DEV( 0x054c, 0x016a, 0x0000, 0x9999, +/* Submitted by Frank Engel <frankie@cse.unsw.edu.au> */ +UNUSUAL_DEV( 0x054c, 0x0099, 0x0000, 0x9999, "Sony", "PEG Mass Storage", US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_INQUIRY ), - -/* Submitted by Frank Engel <frankie@cse.unsw.edu.au> */ -UNUSUAL_DEV( 0x054c, 0x0099, 0x0000, 0x9999, + +/* Submitted by Mike Alborn <malborn@deandra.homeip.net> */ +UNUSUAL_DEV( 0x054c, 0x016a, 0x0000, 0x9999, "Sony", "PEG Mass Storage", US_SC_DEVICE, US_PR_DEVICE, NULL, @@ -990,6 +990,13 @@ UNUSUAL_DEV( 0x05e3, 0x0702, 0x0000, 0xffff, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_GO_SLOW | US_FL_MAX_SECTORS_64 ), +/* Reported by Ben Efros <ben@pc-doctor.com> */ +UNUSUAL_DEV( 0x05e3, 0x0723, 0x9451, 0x9451, + "Genesys Logic", + "USB to SATA", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SANE_SENSE ), + /* Reported by Hanno Boeck <hanno@gmx.de> * Taken from the Lycoris Kernel */ UNUSUAL_DEV( 0x0636, 0x0003, 0x0000, 0x9999, @@ -1329,17 +1336,6 @@ UNUSUAL_DEV( 0x0851, 0x1543, 0x0200, 0x0200, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_NOT_LOCKABLE), -/* Andrew Lunn <andrew@lunn.ch> - * PanDigital Digital Picture Frame. Does not like ALLOW_MEDIUM_REMOVAL - * on LUN 4. - * Note: Vend:Prod clash with "Ltd Maxell WS30 Slim Digital Camera" -*/ -UNUSUAL_DEV( 0x0851, 0x1543, 0x0200, 0x0200, - "PanDigital", - "Photo Frame", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_NOT_LOCKABLE), - /* Submitted by Jan De Luyck <lkml@kcore.org> */ UNUSUAL_DEV( 0x08bd, 0x1100, 0x0000, 0x0000, "CITIZEN", @@ -1435,6 +1431,13 @@ UNUSUAL_DEV( 0x0af0, 0x7401, 0x0000, 0x0000, US_SC_DEVICE, US_PR_DEVICE, NULL, 0 ), +/* Reported by Ben Efros <ben@pc-doctor.com> */ +UNUSUAL_DEV( 0x0bc2, 0x3010, 0x0000, 0x0000, + "Seagate", + "FreeAgent Pro", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SANE_SENSE ), + #ifdef CONFIG_USB_STORAGE_ISD200 UNUSUAL_DEV( 0x0bf6, 0xa001, 0x0100, 0x0110, "ATI", @@ -1458,6 +1461,22 @@ UNUSUAL_DEV( 0x0c0b, 0xa109, 0x0000, 0xffff, US_FL_SINGLE_LUN ), #endif +UNUSUAL_DEV( 0x0d49, 0x7310, 0x0000, 0x9999, + "Maxtor", + "USB to SATA", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SANE_SENSE), + +/* + * Pete Zaitcev <zaitcev@yahoo.com>, bz#164688. + * The device blatantly ignores LUN and returns 1 in GetMaxLUN. + */ +UNUSUAL_DEV( 0x0c45, 0x1060, 0x0100, 0x0100, + "Unknown", + "Unknown", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SINGLE_LUN ), + /* Submitted by: Nick Sillik <n.sillik@temple.edu> * Needed for OneTouch extension to usb-storage * @@ -1475,16 +1494,6 @@ UNUSUAL_DEV( 0x0c0b, 0xa109, 0x0000, 0xffff, 0), #endif -/* - * Pete Zaitcev <zaitcev@yahoo.com>, bz#164688. - * The device blatantly ignores LUN and returns 1 in GetMaxLUN. - */ -UNUSUAL_DEV( 0x0c45, 0x1060, 0x0100, 0x0100, - "Unknown", - "Unknown", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_SINGLE_LUN ), - /* Submitted by Joris Struyve <joris@struyve.be> */ UNUSUAL_DEV( 0x0d96, 0x410a, 0x0001, 0xffff, "Medion", @@ -1624,13 +1633,6 @@ UNUSUAL_DEV( 0x0fce, 0xe030, 0x0000, 0x0000, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_FIX_CAPACITY | US_FL_IGNORE_RESIDUE ), -/* Reported by Ricardo Barberis <ricardo@dattatec.com> */ -UNUSUAL_DEV( 0x0fce, 0xe092, 0x0000, 0x0000, - "Sony Ericsson", - "P1i", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_IGNORE_RESIDUE ), - /* Reported by Emmanuel Vasilakis <evas@forthnet.gr> */ UNUSUAL_DEV( 0x0fce, 0xe031, 0x0000, 0x0000, "Sony Ericsson", @@ -1638,6 +1640,13 @@ UNUSUAL_DEV( 0x0fce, 0xe031, 0x0000, 0x0000, US_SC_DEVICE, US_PR_DEVICE, NULL, US_FL_IGNORE_RESIDUE | US_FL_FIX_CAPACITY ), +/* Reported by Ricardo Barberis <ricardo@dattatec.com> */ +UNUSUAL_DEV( 0x0fce, 0xe092, 0x0000, 0x0000, + "Sony Ericsson", + "P1i", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_IGNORE_RESIDUE ), + /* Reported by Kevin Cernekee <kpc-usbdev@gelato.uiuc.edu> * Tested on hardware version 1.10. * Entry is needed only for the initializer function override. @@ -1650,6 +1659,12 @@ UNUSUAL_DEV( 0x1019, 0x0c55, 0x0000, 0x0110, US_SC_DEVICE, US_PR_DEVICE, usb_stor_ucr61s2b_init, 0 ), +UNUSUAL_DEV( 0x1058, 0x0704, 0x0000, 0x9999, + "Western Digital", + "External HDD", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_SANE_SENSE), + /* Reported by Fabio Venturi <f.venturi@tdnet.it> * The device reports a vendor-specific bDeviceClass. */ @@ -2039,10 +2054,10 @@ UNUSUAL_DEV( 0x14cd, 0x6600, 0x0201, 0x0201, * JMicron responds to USN and several other SCSI ioctls with a * residue that causes subsequent I/O requests to fail. */ UNUSUAL_DEV( 0x152d, 0x2329, 0x0100, 0x0100, - "JMicron", - "USB to ATA/ATAPI Bridge", - US_SC_DEVICE, US_PR_DEVICE, NULL, - US_FL_IGNORE_RESIDUE ), + "JMicron", + "USB to ATA/ATAPI Bridge", + US_SC_DEVICE, US_PR_DEVICE, NULL, + US_FL_IGNORE_RESIDUE | US_FL_SANE_SENSE ), /* Reported by Robert Schedel <r.schedel@yahoo.de> * Note: this is a 'super top' device like the above 14cd/6600 device */ diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index 27016fd2cad1..06c735703f4a 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -113,6 +113,16 @@ static unsigned int delay_use = 5; module_param(delay_use, uint, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(delay_use, "seconds to delay before using a new device"); +static char *quirks; +module_param(quirks, charp, S_IRUGO); +MODULE_PARM_DESC(quirks, "supplemental list of device IDs and their quirks"); + +struct quirks_entry { + u16 vid, pid; + u32 fflags; +}; +static struct quirks_entry *quirks_list, *quirks_end; + /* * The entries in this table correspond, line for line, @@ -464,13 +474,31 @@ static int associate_dev(struct us_data *us, struct usb_interface *intf) US_DEBUGP("I/O buffer allocation failed\n"); return -ENOMEM; } + return 0; +} - us->sensebuf = kmalloc(US_SENSE_SIZE, GFP_KERNEL); - if (!us->sensebuf) { - US_DEBUGP("Sense buffer allocation failed\n"); - return -ENOMEM; +/* Adjust device flags based on the "quirks=" module parameter */ +static void adjust_quirks(struct us_data *us) +{ + u16 vid, pid; + struct quirks_entry *q; + unsigned int mask = (US_FL_FIX_CAPACITY | US_FL_IGNORE_DEVICE | + US_FL_NOT_LOCKABLE | US_FL_MAX_SECTORS_64 | + US_FL_IGNORE_RESIDUE | US_FL_SINGLE_LUN | + US_FL_NO_WP_DETECT); + + vid = le16_to_cpu(us->pusb_dev->descriptor.idVendor); + pid = le16_to_cpu(us->pusb_dev->descriptor.idProduct); + + for (q = quirks_list; q != quirks_end; ++q) { + if (q->vid == vid && q->pid == pid) { + us->fflags = (us->fflags & ~mask) | q->fflags; + dev_info(&us->pusb_intf->dev, "Quirks match for " + "vid %04x pid %04x: %x\n", + vid, pid, q->fflags); + break; + } } - return 0; } /* Find an unusual_dev descriptor (always succeeds in the current code) */ @@ -497,6 +525,7 @@ static int get_device_info(struct us_data *us, const struct usb_device_id *id) idesc->bInterfaceProtocol : unusual_dev->useTransport; us->fflags = USB_US_ORIG_FLAGS(id->driver_info); + adjust_quirks(us); if (us->fflags & US_FL_IGNORE_DEVICE) { printk(KERN_INFO USB_STORAGE "device ignored\n"); @@ -562,7 +591,7 @@ static int get_transport(struct us_data *us) case US_PR_CBI: us->transport_name = "Control/Bulk/Interrupt"; - us->transport = usb_stor_CBI_transport; + us->transport = usb_stor_CB_transport; us->transport_reset = usb_stor_CB_reset; us->max_lun = 7; break; @@ -675,19 +704,19 @@ static int get_protocol(struct us_data *us) case US_SC_8020: us->protocol_name = "8020i"; - us->proto_handler = usb_stor_ATAPI_command; + us->proto_handler = usb_stor_pad12_command; us->max_lun = 0; break; case US_SC_QIC: us->protocol_name = "QIC-157"; - us->proto_handler = usb_stor_qic157_command; + us->proto_handler = usb_stor_pad12_command; us->max_lun = 0; break; case US_SC_8070: us->protocol_name = "8070i"; - us->proto_handler = usb_stor_ATAPI_command; + us->proto_handler = usb_stor_pad12_command; us->max_lun = 0; break; @@ -840,8 +869,6 @@ static void dissociate_dev(struct us_data *us) { US_DEBUGP("-- %s\n", __func__); - kfree(us->sensebuf); - /* Free the device-related DMA-mapped buffers */ if (us->cr) usb_buffer_free(us->pusb_dev, sizeof(*us->cr), us->cr, @@ -1061,10 +1088,88 @@ static struct usb_driver usb_storage_driver = { .soft_unbind = 1, }; +/* Works only for digits and letters, but small and fast */ +#define TOLOWER(x) ((x) | 0x20) + +static void __init parse_quirks(void) +{ + int n, i; + char *p; + + if (!quirks) + return; + + /* Count the ':' characters to get 2 * the number of entries */ + n = 0; + for (p = quirks; *p; ++p) { + if (*p == ':') + ++n; + } + n /= 2; + if (n == 0) + return; /* Don't allocate 0 bytes */ + + quirks_list = kmalloc(n * sizeof(*quirks_list), GFP_KERNEL); + if (!quirks_list) + return; + + p = quirks; + quirks_end = quirks_list; + for (i = 0; i < n && *p; ++i) { + unsigned f = 0; + + /* Each entry consists of VID:PID:flags */ + quirks_end->vid = simple_strtoul(p, &p, 16); + if (*p != ':') + goto skip_to_next; + quirks_end->pid = simple_strtoul(p+1, &p, 16); + if (*p != ':') + goto skip_to_next; + + while (*++p && *p != ',') { + switch (TOLOWER(*p)) { + case 'c': + f |= US_FL_FIX_CAPACITY; + break; + case 'i': + f |= US_FL_IGNORE_DEVICE; + break; + case 'l': + f |= US_FL_NOT_LOCKABLE; + break; + case 'm': + f |= US_FL_MAX_SECTORS_64; + break; + case 'r': + f |= US_FL_IGNORE_RESIDUE; + break; + case 's': + f |= US_FL_SINGLE_LUN; + break; + case 'w': + f |= US_FL_NO_WP_DETECT; + break; + /* Ignore unrecognized flag characters */ + } + } + quirks_end->fflags = f; + ++quirks_end; + + skip_to_next: + /* Entries are separated by commas */ + while (*p) { + if (*p++ == ',') + break; + } + } /* for (i = 0; ...) */ +} + static int __init usb_stor_init(void) { int retval; + printk(KERN_INFO "Initializing USB Mass Storage driver...\n"); + parse_quirks(); /* register the driver, return usb_register return code if error */ retval = usb_register(&usb_storage_driver); diff --git a/drivers/usb/storage/usb.h b/drivers/usb/storage/usb.h index a4ad73bd832d..e4674fc715e6 100644 --- a/drivers/usb/storage/usb.h +++ b/drivers/usb/storage/usb.h @@ -138,7 +138,6 @@ struct us_data { struct usb_ctrlrequest *cr; /* control requests */ struct usb_sg_request current_sg; /* scatter-gather req. */ unsigned char *iobuf; /* I/O buffer */ - unsigned char *sensebuf; /* sense data buffer */ dma_addr_t cr_dma; /* buffer DMA addresses */ dma_addr_t iobuf_dma; struct task_struct *ctl_thread; /* the control thread */ diff --git a/drivers/usb/wusbcore/rh.c b/drivers/usb/wusbcore/rh.c index 267a64325106..b1bb82db4abc 100644 --- a/drivers/usb/wusbcore/rh.c +++ b/drivers/usb/wusbcore/rh.c @@ -352,7 +352,7 @@ static int wusbhc_rh_get_port_status(struct wusbhc *wusbhc, u16 port_idx, u32 *_buf, u16 wLength) { int result = -EINVAL; - u16 *buf = (u16 *) _buf; + __le16 *buf = (__le16 *)_buf; d_fnstart(1, wusbhc->dev, "(wusbhc %p port_idx %u wLength %u)\n", wusbhc, port_idx, wLength); diff --git a/include/linux/oxu210hp.h b/include/linux/oxu210hp.h new file mode 100644 index 000000000000..0bf96eae5389 --- /dev/null +++ b/include/linux/oxu210hp.h @@ -0,0 +1,7 @@ +/* platform data for the OXU210HP HCD */ + +struct oxu210hp_platform_data { + unsigned int bus16:1; + unsigned int use_hcd_otg:1; + unsigned int use_hcd_sph:1; +}; diff --git a/include/linux/usb.h b/include/linux/usb.h index f72aa51f7bcd..74d0b9990c73 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -120,6 +120,11 @@ enum usb_interface_condition { * to the sysfs representation for that device. * @pm_usage_cnt: PM usage counter for this interface; autosuspend is not * allowed unless the counter is 0. + * @reset_ws: Used for scheduling resets from atomic context. + * @reset_running: set to 1 if the interface is currently running a + * queued reset so that usb_cancel_queued_reset() doesn't try to + * remove from the workqueue when running inside the worker + * thread. See __usb_queue_reset_device(). * * USB device drivers attach to interfaces on a physical device. Each * interface encapsulates a single high level function, such as feeding @@ -168,10 +173,12 @@ struct usb_interface { unsigned needs_remote_wakeup:1; /* driver requires remote wakeup */ unsigned needs_altsetting0:1; /* switch to altsetting 0 is pending */ unsigned needs_binding:1; /* needs delayed unbind/rebind */ + unsigned reset_running:1; struct device dev; /* interface specific device info */ struct device *usb_dev; int pm_usage_cnt; /* usage counter for autosuspend */ + struct work_struct reset_ws; /* for resets in atomic context */ }; #define to_usb_interface(d) container_of(d, struct usb_interface, dev) #define interface_to_usbdev(intf) \ @@ -329,7 +336,7 @@ struct usb_bus { #endif struct device *dev; /* device for this bus */ -#if defined(CONFIG_USB_MON) +#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) struct mon_bus *mon_bus; /* non-null when associated */ int monitored; /* non-zero when monitored */ #endif @@ -398,6 +405,7 @@ struct usb_tt; * @urbnum: number of URBs submitted for the whole device * @active_duration: total time device is not suspended * @autosuspend: for delayed autosuspends + * @autoresume: for autoresumes requested while in_interrupt * @pm_mutex: protects PM operations * @last_busy: time of last use * @autosuspend_delay: in jiffies @@ -476,6 +484,7 @@ struct usb_device { #ifdef CONFIG_PM struct delayed_work autosuspend; + struct work_struct autoresume; struct mutex pm_mutex; unsigned long last_busy; @@ -505,6 +514,7 @@ extern int usb_lock_device_for_reset(struct usb_device *udev, /* USB port reset for device reinitialization */ extern int usb_reset_device(struct usb_device *dev); +extern void usb_queue_reset_device(struct usb_interface *dev); extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id); @@ -513,6 +523,8 @@ extern struct usb_device *usb_find_device(u16 vendor_id, u16 product_id); extern int usb_autopm_set_interface(struct usb_interface *intf); extern int usb_autopm_get_interface(struct usb_interface *intf); extern void usb_autopm_put_interface(struct usb_interface *intf); +extern int usb_autopm_get_interface_async(struct usb_interface *intf); +extern void usb_autopm_put_interface_async(struct usb_interface *intf); static inline void usb_autopm_enable(struct usb_interface *intf) { @@ -539,8 +551,13 @@ static inline int usb_autopm_set_interface(struct usb_interface *intf) static inline int usb_autopm_get_interface(struct usb_interface *intf) { return 0; } +static inline int usb_autopm_get_interface_async(struct usb_interface *intf) +{ return 0; } + static inline void usb_autopm_put_interface(struct usb_interface *intf) { } +static inline void usb_autopm_put_interface_async(struct usb_interface *intf) +{ } static inline void usb_autopm_enable(struct usb_interface *intf) { } static inline void usb_autopm_disable(struct usb_interface *intf) @@ -1050,7 +1067,7 @@ struct usb_device_driver { void (*disconnect) (struct usb_device *udev); int (*suspend) (struct usb_device *udev, pm_message_t message); - int (*resume) (struct usb_device *udev); + int (*resume) (struct usb_device *udev, pm_message_t message); struct usbdrv_wrap drvwrap; unsigned int supports_autosuspend:1; }; diff --git a/include/linux/usb/association.h b/include/linux/usb/association.h index 07c5e3cf5898..0a4a18b3c1bb 100644 --- a/include/linux/usb/association.h +++ b/include/linux/usb/association.h @@ -28,17 +28,17 @@ struct wusb_am_attr { }; /* Different fields defined by the spec */ -#define WUSB_AR_AssociationTypeId { .id = 0x0000, .len = 2 } -#define WUSB_AR_AssociationSubTypeId { .id = 0x0001, .len = 2 } -#define WUSB_AR_Length { .id = 0x0002, .len = 4 } -#define WUSB_AR_AssociationStatus { .id = 0x0004, .len = 4 } -#define WUSB_AR_LangID { .id = 0x0008, .len = 2 } -#define WUSB_AR_DeviceFriendlyName { .id = 0x000b, .len = 64 } /* max */ -#define WUSB_AR_HostFriendlyName { .id = 0x000c, .len = 64 } /* max */ -#define WUSB_AR_CHID { .id = 0x1000, .len = 16 } -#define WUSB_AR_CDID { .id = 0x1001, .len = 16 } -#define WUSB_AR_ConnectionContext { .id = 0x1002, .len = 48 } -#define WUSB_AR_BandGroups { .id = 0x1004, .len = 2 } +#define WUSB_AR_AssociationTypeId { .id = cpu_to_le16(0x0000), .len = cpu_to_le16(2) } +#define WUSB_AR_AssociationSubTypeId { .id = cpu_to_le16(0x0001), .len = cpu_to_le16(2) } +#define WUSB_AR_Length { .id = cpu_to_le16(0x0002), .len = cpu_to_le16(4) } +#define WUSB_AR_AssociationStatus { .id = cpu_to_le16(0x0004), .len = cpu_to_le16(4) } +#define WUSB_AR_LangID { .id = cpu_to_le16(0x0008), .len = cpu_to_le16(2) } +#define WUSB_AR_DeviceFriendlyName { .id = cpu_to_le16(0x000b), .len = cpu_to_le16(64) } /* max */ +#define WUSB_AR_HostFriendlyName { .id = cpu_to_le16(0x000c), .len = cpu_to_le16(64) } /* max */ +#define WUSB_AR_CHID { .id = cpu_to_le16(0x1000), .len = cpu_to_le16(16) } +#define WUSB_AR_CDID { .id = cpu_to_le16(0x1001), .len = cpu_to_le16(16) } +#define WUSB_AR_ConnectionContext { .id = cpu_to_le16(0x1002), .len = cpu_to_le16(48) } +#define WUSB_AR_BandGroups { .id = cpu_to_le16(0x1004), .len = cpu_to_le16(2) } /* CBAF Control Requests (AMS1.0[T4-1] */ enum { diff --git a/include/linux/usb/gpio_vbus.h b/include/linux/usb/gpio_vbus.h new file mode 100644 index 000000000000..d9f03ccc2d60 --- /dev/null +++ b/include/linux/usb/gpio_vbus.h @@ -0,0 +1,30 @@ +/* + * A simple GPIO VBUS sensing driver for B peripheral only devices + * with internal transceivers. + * Optionally D+ pullup can be controlled by a second GPIO. + * + * Copyright (c) 2008 Philipp Zabel <philipp.zabel@gmail.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. + * + */ + +/** + * struct gpio_vbus_mach_info - configuration for gpio_vbus + * @gpio_vbus: VBUS sensing GPIO + * @gpio_pullup: optional D+ or D- pullup GPIO (else negative/invalid) + * @gpio_vbus_inverted: true if gpio_vbus is active low + * @gpio_pullup_inverted: true if gpio_pullup is active low + * + * The VBUS sensing GPIO should have a pulldown, which will normally be + * part of a resistor ladder turning a 4.0V-5.25V level on VBUS into a + * value the GPIO detects as active. Some systems will use comparators. + */ +struct gpio_vbus_mach_info { + int gpio_vbus; + int gpio_pullup; + bool gpio_vbus_inverted; + bool gpio_pullup_inverted; +}; diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 1db25d152ad8..94df4fe6c6c0 100644 --- a/include/linux/usb/otg.h +++ b/include/linux/usb/otg.h @@ -84,6 +84,7 @@ extern int otg_set_transceiver(struct otg_transceiver *); /* for usb host and peripheral controller drivers */ extern struct otg_transceiver *otg_get_transceiver(void); +extern void otg_put_transceiver(struct otg_transceiver *); static inline int otg_start_hnp(struct otg_transceiver *otg) diff --git a/include/linux/usb_usual.h b/include/linux/usb_usual.h index d9a3bbe38e6b..998e5cbbf29e 100644 --- a/include/linux/usb_usual.h +++ b/include/linux/usb_usual.h @@ -52,8 +52,9 @@ US_FLAG(MAX_SECTORS_MIN,0x00002000) \ /* Sets max_sectors to arch min */ \ US_FLAG(BULK_IGNORE_TAG,0x00004000) \ - /* Ignore tag mismatch in bulk operations */ - + /* Ignore tag mismatch in bulk operations */ \ + US_FLAG(SANE_SENSE, 0x00008000) + /* Sane Sense (> 18 bytes) */ #define US_FLAG(name, value) US_FL_##name = value , enum { US_DO_ALL_FLAGS }; |