Merge branch 'quilt/usb'

Conflicts:
	drivers/usb/serial/sierra.c

93 files changed, 8607 insertions, 1502 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 4d9f5fb7a45c..60c1dcccb0ad 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6040,6 +6040,12 @@ L:	linux-wireless@vger.kernel.org
 S:	Maintained
 F:	drivers/net/wireless/rndis_wlan.c
 
+USB XHCI DRIVER
+P:	Sarah Sharp
+M:	sarah.a.sharp@intel.com
+L:	linux-usb@vger.kernel.org
+S:	Supported
+
 USB ZC0301 DRIVER
 P:	Luca Risolia
 M:	luca.risolia@studio.unibo.it
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 34bf0fdf5047..0537329b00ac 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -24,6 +24,11 @@
 #include <asm/setup.h>
 #include "pci.h"
 
+const char *pci_power_names[] = {
+	"error", "D0", "D1", "D2", "D3hot", "D3cold", "unknown",
+};
+EXPORT_SYMBOL_GPL(pci_power_names);
+
 unsigned int pci_pm_d3_delay = PCI_PM_D3_WAIT;
 
 #ifdef CONFIG_PCI_DOMAINS
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index c6c816b7ecb5..b35025ae4303 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -63,6 +63,7 @@ config USB_ARCH_HAS_EHCI
 config USB
 	tristate "Support for Host-side USB"
 	depends on USB_ARCH_HAS_HCD
+	select NLS  # for UTF-8 strings
 	---help---
 	  Universal Serial Bus (USB) is a specification for a serial bus
 	  subsystem which offers higher speeds and more features than the
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 0716cdb44cd8..f752f0da8cf4 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_USB_ISP1760_HCD)	+= host/
 obj-$(CONFIG_USB_OHCI_HCD)	+= host/
 obj-$(CONFIG_USB_UHCI_HCD)	+= host/
 obj-$(CONFIG_USB_FHCI_HCD)	+= host/
+obj-$(CONFIG_USB_XHCI_HCD)	+= host/
 obj-$(CONFIG_USB_SL811_HCD)	+= host/
 obj-$(CONFIG_USB_U132_HCD)	+= host/
 obj-$(CONFIG_USB_R8A66597_HCD)	+= host/
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index e1759d17ac5d..69280c35b5cb 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -28,7 +28,7 @@ comment "Miscellaneous USB options"
 	depends on USB
 
 config USB_DEVICEFS
-	bool "USB device filesystem"
+	bool "USB device filesystem (DEPRECATED)" if EMBEDDED
 	depends on USB
 	---help---
 	  If you say Y here (and to "/proc file system support" in the "File
@@ -46,11 +46,15 @@ config USB_DEVICEFS
 	  For the format of the various /proc/bus/usb/ files, please read
 	  <file:Documentation/usb/proc_usb_info.txt>.
 
-	  Usbfs files can't handle Access Control Lists (ACL), which are the
-	  default way to grant access to USB devices for untrusted users of a
-	  desktop system. The usbfs functionality is replaced by real
-	  device-nodes managed by udev. These nodes live in /dev/bus/usb and
-	  are used by libusb.
+	  Modern Linux systems do not use this.
+
+	  Usbfs entries are files and not character devices; usbfs can't
+	  handle Access Control Lists (ACL) which are the default way to
+	  grant access to USB devices for untrusted users of a desktop
+	  system.
+
+	  The usbfs functionality is replaced by real device-nodes managed by
+	  udev.  These nodes lived in /dev/bus/usb and are used by libusb.
 
 config USB_DEVICE_CLASS
 	bool "USB device class-devices (DEPRECATED)"
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index b6078706fb93..ec16e6029905 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -4,14 +4,14 @@
 
 usbcore-objs	:= usb.o hub.o hcd.o urb.o message.o driver.o \
 			config.o file.o buffer.o sysfs.o endpoint.o \
-			devio.o notify.o generic.o quirks.o
+			devio.o notify.o generic.o quirks.o devices.o
 
 ifeq ($(CONFIG_PCI),y)
 	usbcore-objs	+= hcd-pci.o
 endif
 
 ifeq ($(CONFIG_USB_DEVICEFS),y)
-	usbcore-objs	+= inode.o devices.o
+	usbcore-objs	+= inode.o
 endif
 
 obj-$(CONFIG_USB)	+= usbcore.o
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 568244c99bdc..24dfb33f90cb 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -19,6 +19,32 @@ static inline const char *plural(int n)
 	return (n == 1 ? "" : "s");
 }
 
+/* FIXME: this is a kludge */
+static int find_next_descriptor_more(unsigned char *buffer, int size,
+    int dt1, int dt2, int dt3, int *num_skipped)
+{
+	struct usb_descriptor_header *h;
+	int n = 0;
+	unsigned char *buffer0 = buffer;
+
+	/* Find the next descriptor of type dt1 or dt2 or dt3 */
+	while (size > 0) {
+		h = (struct usb_descriptor_header *) buffer;
+		if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2 ||
+				h->bDescriptorType == dt3)
+			break;
+		buffer += h->bLength;
+		size -= h->bLength;
+		++n;
+	}
+
+	/* Store the number of descriptors skipped and return the
+	 * number of bytes skipped */
+	if (num_skipped)
+		*num_skipped = n;
+	return buffer - buffer0;
+}
+
 static int find_next_descriptor(unsigned char *buffer, int size,
     int dt1, int dt2, int *num_skipped)
 {
@@ -43,6 +69,129 @@ static int find_next_descriptor(unsigned char *buffer, int size,
 	return buffer - buffer0;
 }
 
+static int usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
+		int inum, int asnum, struct usb_host_endpoint *ep,
+		int num_ep, unsigned char *buffer, int size)
+{
+	unsigned char *buffer_start = buffer;
+	struct usb_ss_ep_comp_descriptor	*desc;
+	int retval;
+	int num_skipped;
+	int max_tx;
+	int i;
+
+	/* Allocate space for the SS endpoint companion descriptor */
+	ep->ss_ep_comp = kzalloc(sizeof(struct usb_host_ss_ep_comp),
+			GFP_KERNEL);
+	if (!ep->ss_ep_comp)
+		return -ENOMEM;
+	desc = (struct usb_ss_ep_comp_descriptor *) buffer;
+	if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP) {
+		dev_warn(ddev, "No SuperSpeed endpoint companion for config %d "
+				" interface %d altsetting %d ep %d: "
+				"using minimum values\n",
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		ep->ss_ep_comp->desc.bLength = USB_DT_SS_EP_COMP_SIZE;
+		ep->ss_ep_comp->desc.bDescriptorType = USB_DT_SS_ENDPOINT_COMP;
+		ep->ss_ep_comp->desc.bMaxBurst = 0;
+		/*
+		 * Leave bmAttributes as zero, which will mean no streams for
+		 * bulk, and isoc won't support multiple bursts of packets.
+		 * With bursts of only one packet, and a Mult of 1, the max
+		 * amount of data moved per endpoint service interval is one
+		 * packet.
+		 */
+		if (usb_endpoint_xfer_isoc(&ep->desc) ||
+				usb_endpoint_xfer_int(&ep->desc))
+			ep->ss_ep_comp->desc.wBytesPerInterval =
+				ep->desc.wMaxPacketSize;
+		/*
+		 * The next descriptor is for an Endpoint or Interface,
+		 * no extra descriptors to copy into the companion structure,
+		 * and we didn't eat up any of the buffer.
+		 */
+		retval = 0;
+		goto valid;
+	}
+	memcpy(&ep->ss_ep_comp->desc, desc, USB_DT_SS_EP_COMP_SIZE);
+	desc = &ep->ss_ep_comp->desc;
+	buffer += desc->bLength;
+	size -= desc->bLength;
+
+	/* Eat up the other descriptors we don't care about */
+	ep->ss_ep_comp->extra = buffer;
+	i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
+			USB_DT_INTERFACE, &num_skipped);
+	ep->ss_ep_comp->extralen = i;
+	buffer += i;
+	size -= i;
+	retval = buffer - buffer_start + i;
+	if (num_skipped > 0)
+		dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
+				num_skipped, plural(num_skipped),
+				"SuperSpeed endpoint companion");
+
+	/* Check the various values */
+	if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) {
+		dev_warn(ddev, "Control endpoint with bMaxBurst = %d in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to zero\n", desc->bMaxBurst,
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		desc->bMaxBurst = 0;
+	}
+	if (desc->bMaxBurst > 15) {
+		dev_warn(ddev, "Endpoint with bMaxBurst = %d in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to 15\n", desc->bMaxBurst,
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		desc->bMaxBurst = 15;
+	}
+	if ((usb_endpoint_xfer_control(&ep->desc) || usb_endpoint_xfer_int(&ep->desc))
+			&& desc->bmAttributes != 0) {
+		dev_warn(ddev, "%s endpoint with bmAttributes = %d in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to zero\n",
+				usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk",
+				desc->bmAttributes,
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		desc->bmAttributes = 0;
+	}
+	if (usb_endpoint_xfer_bulk(&ep->desc) && desc->bmAttributes > 16) {
+		dev_warn(ddev, "Bulk endpoint with more than 65536 streams in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to max\n",
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		desc->bmAttributes = 16;
+	}
+	if (usb_endpoint_xfer_isoc(&ep->desc) && desc->bmAttributes > 2) {
+		dev_warn(ddev, "Isoc endpoint has Mult of %d in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to 3\n", desc->bmAttributes + 1,
+				cfgno, inum, asnum, ep->desc.bEndpointAddress);
+		desc->bmAttributes = 2;
+	}
+	if (usb_endpoint_xfer_isoc(&ep->desc)) {
+		max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1) *
+			(desc->bmAttributes + 1);
+	} else if (usb_endpoint_xfer_int(&ep->desc)) {
+		max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1);
+	} else {
+		goto valid;
+	}
+	if (desc->wBytesPerInterval > max_tx) {
+		dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in "
+				"config %d interface %d altsetting %d ep %d: "
+				"setting to %d\n",
+				usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int",
+				desc->wBytesPerInterval,
+				cfgno, inum, asnum, ep->desc.bEndpointAddress,
+				max_tx);
+		desc->wBytesPerInterval = max_tx;
+	}
+valid:
+	return retval;
+}
+
 static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
     int asnum, struct usb_host_interface *ifp, int num_ep,
     unsigned char *buffer, int size)
@@ -50,7 +199,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
 	unsigned char *buffer0 = buffer;
 	struct usb_endpoint_descriptor *d;
 	struct usb_host_endpoint *endpoint;
-	int n, i, j;
+	int n, i, j, retval;
 
 	d = (struct usb_endpoint_descriptor *) buffer;
 	buffer += d->bLength;
@@ -92,6 +241,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
 	if (usb_endpoint_xfer_int(d)) {
 		i = 1;
 		switch (to_usb_device(ddev)->speed) {
+		case USB_SPEED_SUPER:
 		case USB_SPEED_HIGH:
 			/* Many device manufacturers are using full-speed
 			 * bInterval values in high-speed interrupt endpoint
@@ -161,17 +311,39 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
 				cfgno, inum, asnum, d->bEndpointAddress,
 				maxp);
 	}
-
-	/* Skip over any Class Specific or Vendor Specific descriptors;
-	 * find the next endpoint or interface descriptor */
-	endpoint->extra = buffer;
-	i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
-	    USB_DT_INTERFACE, &n);
-	endpoint->extralen = i;
+	/* Allocate room for and parse any SS endpoint companion descriptors */
+	if (to_usb_device(ddev)->speed == USB_SPEED_SUPER) {
+		endpoint->extra = buffer;
+		i = find_next_descriptor_more(buffer, size, USB_DT_SS_ENDPOINT_COMP,
+				USB_DT_ENDPOINT, USB_DT_INTERFACE, &n);
+		endpoint->extralen = i;
+		buffer += i;
+		size -= i;
+
+		if (size > 0) {
+			retval = usb_parse_ss_endpoint_companion(ddev, cfgno,
+					inum, asnum, endpoint, num_ep, buffer,
+					size);
+			if (retval >= 0) {
+				buffer += retval;
+				retval = buffer - buffer0;
+			}
+		} else {
+			retval = buffer - buffer0;
+		}
+	} else {
+		/* Skip over any Class Specific or Vendor Specific descriptors;
+		 * find the next endpoint or interface descriptor */
+		endpoint->extra = buffer;
+		i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
+				USB_DT_INTERFACE, &n);
+		endpoint->extralen = i;
+		retval = buffer - buffer0 + i;
+	}
 	if (n > 0)
 		dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
 		    n, plural(n), "endpoint");
-	return buffer - buffer0 + i;
+	return retval;
 
 skip_to_next_endpoint_or_interface_descriptor:
 	i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
@@ -452,6 +624,8 @@ static int usb_parse_configuration(struct device *ddev, int cfgidx,
 		kref_init(&intfc->ref);
 	}
 
+	/* FIXME: parse the BOS descriptor */
+
 	/* Skip over any Class Specific or Vendor Specific descriptors;
 	 * find the first interface descriptor */
 	config->extra = buffer;
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index d0a21a5f8201..c115eed0fdc3 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -385,7 +385,6 @@ void usb_driver_release_interface(struct usb_driver *driver,
 					struct usb_interface *iface)
 {
 	struct device *dev = &iface->dev;
-	struct usb_device *udev = interface_to_usbdev(iface);
 
 	/* this should never happen, don't release something that's not ours */
 	if (!dev->driver || dev->driver != &driver->drvwrap.driver)
@@ -394,23 +393,19 @@ void usb_driver_release_interface(struct usb_driver *driver,
 	/* don't release from within disconnect() */
 	if (iface->condition != USB_INTERFACE_BOUND)
 		return;
+	iface->condition = USB_INTERFACE_UNBINDING;
 
-	/* don't release if the interface hasn't been added yet */
+	/* Release via the driver core only if the interface
+	 * has already been registered
+	 */
 	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);
+		down(&dev->sem);
+		usb_unbind_interface(dev);
+		dev->driver = NULL;
+		up(&dev->sem);
 	}
-	dev->driver = NULL;
-	usb_set_intfdata(iface, NULL);
-
-	usb_pm_lock(udev);
-	iface->condition = USB_INTERFACE_UNBOUND;
-	mark_quiesced(iface);
-	iface->needs_remote_wakeup = 0;
-	usb_pm_unlock(udev);
 }
 EXPORT_SYMBOL_GPL(usb_driver_release_interface);
 
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index a4301dc02d27..91f2885b6ee1 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -185,194 +185,198 @@ void usb_hcd_pci_remove(struct pci_dev *dev)
 }
 EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
 
-
-#ifdef	CONFIG_PM
-
 /**
- * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
- * @dev: USB Host Controller being suspended
- * @message: Power Management message describing this state transition
- *
- * Store this function in the HCD's struct pci_driver as .suspend.
+ * usb_hcd_pci_shutdown - shutdown host controller
+ * @dev: USB Host Controller being shutdown
  */
-int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
+void usb_hcd_pci_shutdown(struct pci_dev *dev)
+{
+	struct usb_hcd		*hcd;
+
+	hcd = pci_get_drvdata(dev);
+	if (!hcd)
+		return;
+
+	if (hcd->driver->shutdown)
+		hcd->driver->shutdown(hcd);
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
+
+#ifdef	CONFIG_PM_SLEEP
+
+static int check_root_hub_suspended(struct device *dev)
+{
+	struct pci_dev		*pci_dev = to_pci_dev(dev);
+	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
+
+	if (!(hcd->state == HC_STATE_SUSPENDED ||
+			hcd->state == HC_STATE_HALT)) {
+		dev_warn(dev, "Root hub is not suspended\n");
+		return -EBUSY;
+	}
+	return 0;
+}
+
+static int hcd_pci_suspend(struct device *dev)
 {
-	struct usb_hcd		*hcd = pci_get_drvdata(dev);
-	int			retval = 0;
-	int			wake, w;
-	int			has_pci_pm;
+	struct pci_dev		*pci_dev = to_pci_dev(dev);
+	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
+	int			retval;
 
 	/* Root hub suspend should have stopped all downstream traffic,
 	 * and all bus master traffic.  And done so for both the interface
 	 * and the stub usb_device (which we check here).  But maybe it
 	 * didn't; writing sysfs power/state files ignores such rules...
-	 *
-	 * We must ignore the FREEZE vs SUSPEND distinction here, because
-	 * otherwise the swsusp will save (and restore) garbage state.
 	 */
-	if (!(hcd->state == HC_STATE_SUSPENDED ||
-			hcd->state == HC_STATE_HALT)) {
-		dev_warn(&dev->dev, "Root hub is not suspended\n");
-		retval = -EBUSY;
-		goto done;
-	}
+	retval = check_root_hub_suspended(dev);
+	if (retval)
+		return retval;
 
 	/* We might already be suspended (runtime PM -- not yet written) */
-	if (dev->current_state != PCI_D0)
-		goto done;
+	if (pci_dev->current_state != PCI_D0)
+		return retval;
 
 	if (hcd->driver->pci_suspend) {
-		retval = hcd->driver->pci_suspend(hcd, message);
+		retval = hcd->driver->pci_suspend(hcd);
 		suspend_report_result(hcd->driver->pci_suspend, retval);
 		if (retval)
-			goto done;
+			return retval;
 	}
 
-	synchronize_irq(dev->irq);
+	synchronize_irq(pci_dev->irq);
 
 	/* Downstream ports from this root hub should already be quiesced, so
 	 * there will be no DMA activity.  Now we can shut down the upstream
-	 * link (except maybe for PME# resume signaling) and enter some PCI
-	 * low power state, if the hardware allows.
+	 * link (except maybe for PME# resume signaling).  We'll enter a
+	 * low power state during suspend_noirq, if the hardware allows.
 	 */
-	pci_disable_device(dev);
+	pci_disable_device(pci_dev);
+	return retval;
+}
+
+static int hcd_pci_suspend_noirq(struct device *dev)
+{
+	struct pci_dev		*pci_dev = to_pci_dev(dev);
+	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
+	int			retval;
+
+	retval = check_root_hub_suspended(dev);
+	if (retval)
+		return retval;
 
-	pci_save_state(dev);
+	pci_save_state(pci_dev);
 
-	/* Don't fail on error to enable wakeup.  We rely on pci code
-	 * to reject requests the hardware can't implement, rather
-	 * than coding the same thing.
+	/* If the root hub is HALTed rather than SUSPENDed,
+	 * disallow remote wakeup.
 	 */
-	wake = (hcd->state == HC_STATE_SUSPENDED &&
-			device_may_wakeup(&dev->dev));
-	w = pci_wake_from_d3(dev, wake);
-	if (w < 0)
-		wake = w;
-	dev_dbg(&dev->dev, "wakeup: %d\n", wake);
-
-	/* Don't change state if we don't need to */
-	if (message.event == PM_EVENT_FREEZE ||
-			message.event == PM_EVENT_PRETHAW) {
-		dev_dbg(&dev->dev, "--> no state change\n");
-		goto done;
-	}
+	if (hcd->state == HC_STATE_HALT)
+		device_set_wakeup_enable(dev, 0);
+	dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
 
-	has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
-	if (!has_pci_pm) {
-		dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
+	/* Possibly enable remote wakeup,
+	 * choose the appropriate low-power state, and go to that state.
+	 */
+	retval = pci_prepare_to_sleep(pci_dev);
+	if (retval == -EIO) {		/* Low-power not supported */
+		dev_dbg(dev, "--> PCI D0 legacy\n");
+		retval = 0;
+	} else if (retval == 0) {
+		dev_dbg(dev, "--> PCI %s\n",
+				pci_power_name(pci_dev->current_state));
 	} else {
-
-		/* NOTE:  dev->current_state becomes nonzero only here, and
-		 * only for devices that support PCI PM.  Also, exiting
-		 * PCI_D3 (but not PCI_D1 or PCI_D2) is allowed to reset
-		 * some device state (e.g. as part of clock reinit).
-		 */
-		retval = pci_set_power_state(dev, PCI_D3hot);
-		suspend_report_result(pci_set_power_state, retval);
-		if (retval == 0) {
-			dev_dbg(&dev->dev, "--> PCI D3\n");
-		} else {
-			dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
-					retval);
-			pci_restore_state(dev);
-		}
+		suspend_report_result(pci_prepare_to_sleep, retval);
+		return retval;
 	}
 
 #ifdef CONFIG_PPC_PMAC
-	if (retval == 0) {
-		/* Disable ASIC clocks for USB */
-		if (machine_is(powermac)) {
-			struct device_node	*of_node;
-
-			of_node = pci_device_to_OF_node(dev);
-			if (of_node)
-				pmac_call_feature(PMAC_FTR_USB_ENABLE,
-							of_node, 0, 0);
-		}
+	/* Disable ASIC clocks for USB */
+	if (machine_is(powermac)) {
+		struct device_node	*of_node;
+
+		of_node = pci_device_to_OF_node(pci_dev);
+		if (of_node)
+			pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
 	}
 #endif
-
- done:
 	return retval;
 }
-EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
 
-/**
- * usb_hcd_pci_resume - power management resume of a PCI-based HCD
- * @dev: USB Host Controller being resumed
- *
- * Store this function in the HCD's struct pci_driver as .resume.
- */
-int usb_hcd_pci_resume(struct pci_dev *dev)
+static int hcd_pci_resume_noirq(struct device *dev)
 {
-	struct usb_hcd		*hcd;
-	int			retval;
+	struct pci_dev		*pci_dev = to_pci_dev(dev);
 
 #ifdef CONFIG_PPC_PMAC
 	/* Reenable ASIC clocks for USB */
 	if (machine_is(powermac)) {
 		struct device_node *of_node;
 
-		of_node = pci_device_to_OF_node(dev);
+		of_node = pci_device_to_OF_node(pci_dev);
 		if (of_node)
 			pmac_call_feature(PMAC_FTR_USB_ENABLE,
 						of_node, 0, 1);
 	}
 #endif
 
-	pci_restore_state(dev);
+	/* Go back to D0 and disable remote wakeup */
+	pci_back_from_sleep(pci_dev);
+	return 0;
+}
+
+static int resume_common(struct device *dev, bool hibernated)
+{
+	struct pci_dev		*pci_dev = to_pci_dev(dev);
+	struct usb_hcd		*hcd = pci_get_drvdata(pci_dev);
+	int			retval;
 
-	hcd = pci_get_drvdata(dev);
 	if (hcd->state != HC_STATE_SUSPENDED) {
-		dev_dbg(hcd->self.controller,
-				"can't resume, not suspended!\n");
+		dev_dbg(dev, "can't resume, not suspended!\n");
 		return 0;
 	}
 
-	pci_enable_wake(dev, PCI_D0, false);
-
-	retval = pci_enable_device(dev);
+	retval = pci_enable_device(pci_dev);
 	if (retval < 0) {
-		dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
-				retval);
+		dev_err(dev, "can't re-enable after resume, %d!\n", retval);
 		return retval;
 	}
 
-	pci_set_master(dev);
-
-	/* yes, ignore this result too... */
-	(void) pci_wake_from_d3(dev, 0);
+	pci_set_master(pci_dev);
 
 	clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
 
 	if (hcd->driver->pci_resume) {
-		retval = hcd->driver->pci_resume(hcd);
+		retval = hcd->driver->pci_resume(hcd, hibernated);
 		if (retval) {
-			dev_err(hcd->self.controller,
-				"PCI post-resume error %d!\n", retval);
+			dev_err(dev, "PCI post-resume error %d!\n", retval);
 			usb_hc_died(hcd);
 		}
 	}
 	return retval;
 }
-EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
 
-#endif	/* CONFIG_PM */
-
-/**
- * usb_hcd_pci_shutdown - shutdown host controller
- * @dev: USB Host Controller being shutdown
- */
-void usb_hcd_pci_shutdown(struct pci_dev *dev)
+static int hcd_pci_resume(struct device *dev)
 {
-	struct usb_hcd		*hcd;
-
-	hcd = pci_get_drvdata(dev);
-	if (!hcd)
-		return;
+	return resume_common(dev, false);
+}
 
-	if (hcd->driver->shutdown)
-		hcd->driver->shutdown(hcd);
+static int hcd_pci_restore(struct device *dev)
+{
+	return resume_common(dev, true);
 }
-EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
 
+struct dev_pm_ops usb_hcd_pci_pm_ops = {
+	.suspend	= hcd_pci_suspend,
+	.suspend_noirq	= hcd_pci_suspend_noirq,
+	.resume_noirq	= hcd_pci_resume_noirq,
+	.resume		= hcd_pci_resume,
+	.freeze		= check_root_hub_suspended,
+	.freeze_noirq	= check_root_hub_suspended,
+	.thaw_noirq	= NULL,
+	.thaw		= NULL,
+	.poweroff	= hcd_pci_suspend,
+	.poweroff_noirq	= hcd_pci_suspend_noirq,
+	.restore_noirq	= hcd_pci_resume_noirq,
+	.restore	= hcd_pci_restore,
+};
+EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
+
+#endif	/* CONFIG_PM_SLEEP */
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 42b93da1085d..ce3f453f02ef 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -128,6 +128,27 @@ static inline int is_root_hub(struct usb_device *udev)
 #define KERNEL_REL	((LINUX_VERSION_CODE >> 16) & 0x0ff)
 #define KERNEL_VER	((LINUX_VERSION_CODE >> 8) & 0x0ff)
 
+/* usb 3.0 root hub device descriptor */
+static const u8 usb3_rh_dev_descriptor[18] = {
+	0x12,       /*  __u8  bLength; */
+	0x01,       /*  __u8  bDescriptorType; Device */
+	0x00, 0x03, /*  __le16 bcdUSB; v3.0 */
+
+	0x09,	    /*  __u8  bDeviceClass; HUB_CLASSCODE */
+	0x00,	    /*  __u8  bDeviceSubClass; */
+	0x03,       /*  __u8  bDeviceProtocol; USB 3.0 hub */
+	0x09,       /*  __u8  bMaxPacketSize0; 2^9 = 512 Bytes */
+
+	0x6b, 0x1d, /*  __le16 idVendor; Linux Foundation */
+	0x02, 0x00, /*  __le16 idProduct; device 0x0002 */
+	KERNEL_VER, KERNEL_REL, /*  __le16 bcdDevice */
+
+	0x03,       /*  __u8  iManufacturer; */
+	0x02,       /*  __u8  iProduct; */
+	0x01,       /*  __u8  iSerialNumber; */
+	0x01        /*  __u8  bNumConfigurations; */
+};
+
 /* usb 2.0 root hub device descriptor */
 static const u8 usb2_rh_dev_descriptor [18] = {
 	0x12,       /*  __u8  bLength; */
@@ -273,6 +294,47 @@ static const u8 hs_rh_config_descriptor [] = {
 	0x0c        /*  __u8  ep_bInterval; (256ms -- usb 2.0 spec) */
 };
 
+static const u8 ss_rh_config_descriptor[] = {
+	/* one configuration */
+	0x09,       /*  __u8  bLength; */
+	0x02,       /*  __u8  bDescriptorType; Configuration */
+	0x19, 0x00, /*  __le16 wTotalLength; FIXME */
+	0x01,       /*  __u8  bNumInterfaces; (1) */
+	0x01,       /*  __u8  bConfigurationValue; */
+	0x00,       /*  __u8  iConfiguration; */
+	0xc0,       /*  __u8  bmAttributes;
+				 Bit 7: must be set,
+				     6: Self-powered,
+				     5: Remote wakeup,
+				     4..0: resvd */
+	0x00,       /*  __u8  MaxPower; */
+
+	/* one interface */
+	0x09,       /*  __u8  if_bLength; */
+	0x04,       /*  __u8  if_bDescriptorType; Interface */
+	0x00,       /*  __u8  if_bInterfaceNumber; */
+	0x00,       /*  __u8  if_bAlternateSetting; */
+	0x01,       /*  __u8  if_bNumEndpoints; */
+	0x09,       /*  __u8  if_bInterfaceClass; HUB_CLASSCODE */
+	0x00,       /*  __u8  if_bInterfaceSubClass; */
+	0x00,       /*  __u8  if_bInterfaceProtocol; */
+	0x00,       /*  __u8  if_iInterface; */
+
+	/* one endpoint (status change endpoint) */
+	0x07,       /*  __u8  ep_bLength; */
+	0x05,       /*  __u8  ep_bDescriptorType; Endpoint */
+	0x81,       /*  __u8  ep_bEndpointAddress; IN Endpoint 1 */
+	0x03,       /*  __u8  ep_bmAttributes; Interrupt */
+		    /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8)
+		     * see hub.c:hub_configure() for details. */
+	(USB_MAXCHILDREN + 1 + 7) / 8, 0x00,
+	0x0c        /*  __u8  ep_bInterval; (256ms -- usb 2.0 spec) */
+	/*
+	 * All 3.0 hubs should have an endpoint companion descriptor,
+	 * but we're ignoring that for now.  FIXME?
+	 */
+};
+
 /*-------------------------------------------------------------------------*/
 
 /*
@@ -426,23 +488,39 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
 	case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
 		switch (wValue & 0xff00) {
 		case USB_DT_DEVICE << 8:
-			if (hcd->driver->flags & HCD_USB2)
+			switch (hcd->driver->flags & HCD_MASK) {
+			case HCD_USB3:
+				bufp = usb3_rh_dev_descriptor;
+				break;
+			case HCD_USB2:
 				bufp = usb2_rh_dev_descriptor;
-			else if (hcd->driver->flags & HCD_USB11)
+				break;
+			case HCD_USB11:
 				bufp = usb11_rh_dev_descriptor;
-			else
+				break;
+			default:
 				goto error;
+			}
 			len = 18;
 			if (hcd->has_tt)
 				patch_protocol = 1;
 			break;
 		case USB_DT_CONFIG << 8:
-			if (hcd->driver->flags & HCD_USB2) {
+			switch (hcd->driver->flags & HCD_MASK) {
+			case HCD_USB3:
+				bufp = ss_rh_config_descriptor;
+				len = sizeof ss_rh_config_descriptor;
+				break;
+			case HCD_USB2:
 				bufp = hs_rh_config_descriptor;
 				len = sizeof hs_rh_config_descriptor;
-			} else {
+				break;
+			case HCD_USB11:
 				bufp = fs_rh_config_descriptor;
 				len = sizeof fs_rh_config_descriptor;
+				break;
+			default:
+				goto error;
 			}
 			if (device_can_wakeup(&hcd->self.root_hub->dev))
 				patch_wakeup = 1;
@@ -755,23 +833,6 @@ static struct attribute_group usb_bus_attr_group = {
 
 /*-------------------------------------------------------------------------*/
 
-static struct class *usb_host_class;
-
-int usb_host_init(void)
-{
-	int retval = 0;
-
-	usb_host_class = class_create(THIS_MODULE, "usb_host");
-	if (IS_ERR(usb_host_class))
-		retval = PTR_ERR(usb_host_class);
-	return retval;
-}
-
-void usb_host_cleanup(void)
-{
-	class_destroy(usb_host_class);
-}
-
 /**
  * usb_bus_init - shared initialization code
  * @bus: the bus structure being initialized
@@ -818,12 +879,6 @@ static int usb_register_bus(struct usb_bus *bus)
 	set_bit (busnum, busmap.busmap);
 	bus->busnum = busnum;
 
-	bus->dev = device_create(usb_host_class, bus->controller, MKDEV(0, 0),
-				 bus, "usb_host%d", busnum);
-	result = PTR_ERR(bus->dev);
-	if (IS_ERR(bus->dev))
-		goto error_create_class_dev;
-
 	/* Add it to the local list of buses */
 	list_add (&bus->bus_list, &usb_bus_list);
 	mutex_unlock(&usb_bus_list_lock);
@@ -834,8 +889,6 @@ static int usb_register_bus(struct usb_bus *bus)
 		  "number %d\n", bus->busnum);
 	return 0;
 
-error_create_class_dev:
-	clear_bit(busnum, busmap.busmap);
 error_find_busnum:
 	mutex_unlock(&usb_bus_list_lock);
 	return result;
@@ -865,8 +918,6 @@ static void usb_deregister_bus (struct usb_bus *bus)
 	usb_notify_remove_bus(bus);
 
 	clear_bit (bus->busnum, busmap.busmap);
-
-	device_unregister(bus->dev);
 }
 
 /**
@@ -1199,7 +1250,8 @@ static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
 
 	/* Map the URB's buffers for DMA access.
 	 * Lower level HCD code should use *_dma exclusively,
-	 * unless it uses pio or talks to another transport.
+	 * unless it uses pio or talks to another transport,
+	 * or uses the provided scatter gather list for bulk.
 	 */
 	if (is_root_hub(urb->dev))
 		return 0;
@@ -1520,6 +1572,92 @@ rescan:
 	}
 }
 
+/* Check whether a new configuration or alt setting for an interface
+ * will exceed the bandwidth for the bus (or the host controller resources).
+ * Only pass in a non-NULL config or interface, not both!
+ * Passing NULL for both new_config and new_intf means the device will be
+ * de-configured by issuing a set configuration 0 command.
+ */
+int usb_hcd_check_bandwidth(struct usb_device *udev,
+		struct usb_host_config *new_config,
+		struct usb_interface *new_intf)
+{
+	int num_intfs, i, j;
+	struct usb_interface_cache *intf_cache;
+	struct usb_host_interface *alt = 0;
+	int ret = 0;
+	struct usb_hcd *hcd;
+	struct usb_host_endpoint *ep;
+
+	hcd = bus_to_hcd(udev->bus);
+	if (!hcd->driver->check_bandwidth)
+		return 0;
+
+	/* Configuration is being removed - set configuration 0 */
+	if (!new_config && !new_intf) {
+		for (i = 1; i < 16; ++i) {
+			ep = udev->ep_out[i];
+			if (ep)
+				hcd->driver->drop_endpoint(hcd, udev, ep);
+			ep = udev->ep_in[i];
+			if (ep)
+				hcd->driver->drop_endpoint(hcd, udev, ep);
+		}
+		hcd->driver->check_bandwidth(hcd, udev);
+		return 0;
+	}
+	/* Check if the HCD says there's enough bandwidth.  Enable all endpoints
+	 * each interface's alt setting 0 and ask the HCD to check the bandwidth
+	 * of the bus.  There will always be bandwidth for endpoint 0, so it's
+	 * ok to exclude it.
+	 */
+	if (new_config) {
+		num_intfs = new_config->desc.bNumInterfaces;
+		/* Remove endpoints (except endpoint 0, which is always on the
+		 * schedule) from the old config from the schedule
+		 */
+		for (i = 1; i < 16; ++i) {
+			ep = udev->ep_out[i];
+			if (ep) {
+				ret = hcd->driver->drop_endpoint(hcd, udev, ep);
+				if (ret < 0)
+					goto reset;
+			}
+			ep = udev->ep_in[i];
+			if (ep) {
+				ret = hcd->driver->drop_endpoint(hcd, udev, ep);
+				if (ret < 0)
+					goto reset;
+			}
+		}
+		for (i = 0; i < num_intfs; ++i) {
+
+			/* Dig the endpoints for alt setting 0 out of the
+			 * interface cache for this interface
+			 */
+			intf_cache = new_config->intf_cache[i];
+			for (j = 0; j < intf_cache->num_altsetting; j++) {
+				if (intf_cache->altsetting[j].desc.bAlternateSetting == 0)
+					alt = &intf_cache->altsetting[j];
+			}
+			if (!alt) {
+				printk(KERN_DEBUG "Did not find alt setting 0 for intf %d\n", i);
+				continue;
+			}
+			for (j = 0; j < alt->desc.bNumEndpoints; j++) {
+				ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]);
+				if (ret < 0)
+					goto reset;
+			}
+		}
+	}
+	ret = hcd->driver->check_bandwidth(hcd, udev);
+reset:
+	if (ret < 0)
+		hcd->driver->reset_bandwidth(hcd, udev);
+	return ret;
+}
+
 /* Disables the endpoint: synchronizes with the hcd to make sure all
  * endpoint state is gone from hardware.  usb_hcd_flush_endpoint() must
  * have been called previously.  Use for set_configuration, set_interface,
@@ -1897,8 +2035,20 @@ int usb_add_hcd(struct usb_hcd *hcd,
 		retval = -ENOMEM;
 		goto err_allocate_root_hub;
 	}
-	rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH :
-			USB_SPEED_FULL;
+
+	switch (hcd->driver->flags & HCD_MASK) {
+	case HCD_USB11:
+		rhdev->speed = USB_SPEED_FULL;
+		break;
+	case HCD_USB2:
+		rhdev->speed = USB_SPEED_HIGH;
+		break;
+	case HCD_USB3:
+		rhdev->speed = USB_SPEED_SUPER;
+		break;
+	default:
+		goto err_allocate_root_hub;
+	}
 	hcd->self.root_hub = rhdev;
 
 	/* wakeup flag init defaults to "everything works" for root hubs,
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index e7d4479de41c..d397ecfd5b17 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -173,6 +173,8 @@ struct hc_driver {
 #define	HCD_LOCAL_MEM	0x0002		/* HC needs local memory */
 #define	HCD_USB11	0x0010		/* USB 1.1 */
 #define	HCD_USB2	0x0020		/* USB 2.0 */
+#define	HCD_USB3	0x0040		/* USB 3.0 */
+#define	HCD_MASK	0x0070
 
 	/* called to init HCD and root hub */
 	int	(*reset) (struct usb_hcd *hcd);
@@ -182,10 +184,10 @@ struct hc_driver {
 	 * a whole, not just the root hub; they're for PCI bus glue.
 	 */
 	/* called after suspending the hub, before entering D3 etc */
-	int	(*pci_suspend) (struct usb_hcd *hcd, pm_message_t message);
+	int	(*pci_suspend)(struct usb_hcd *hcd);
 
 	/* called after entering D0 (etc), before resuming the hub */
-	int	(*pci_resume) (struct usb_hcd *hcd);
+	int	(*pci_resume)(struct usb_hcd *hcd, bool hibernated);
 
 	/* cleanly make HCD stop writing memory and doing I/O */
 	void	(*stop) (struct usb_hcd *hcd);
@@ -224,6 +226,43 @@ struct hc_driver {
 	void	(*relinquish_port)(struct usb_hcd *, int);
 		/* has a port been handed over to a companion? */
 	int	(*port_handed_over)(struct usb_hcd *, int);
+
+	/* xHCI specific functions */
+		/* Called by usb_alloc_dev to alloc HC device structures */
+	int	(*alloc_dev)(struct usb_hcd *, struct usb_device *);
+		/* Called by usb_release_dev to free HC device structures */
+	void	(*free_dev)(struct usb_hcd *, struct usb_device *);
+
+	/* Bandwidth computation functions */
+	/* Note that add_endpoint() can only be called once per endpoint before
+	 * check_bandwidth() or reset_bandwidth() must be called.
+	 * drop_endpoint() can only be called once per endpoint also.
+	 * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
+	 * add the endpoint to the schedule with possibly new parameters denoted by a
+	 * different endpoint descriptor in usb_host_endpoint.
+	 * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
+	 * not allowed.
+	 */
+		/* Allocate endpoint resources and add them to a new schedule */
+	int 	(*add_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
+		/* Drop an endpoint from a new schedule */
+	int 	(*drop_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
+		/* Check that a new hardware configuration, set using
+		 * endpoint_enable and endpoint_disable, does not exceed bus
+		 * bandwidth.  This must be called before any set configuration
+		 * or set interface requests are sent to the device.
+		 */
+	int	(*check_bandwidth)(struct usb_hcd *, struct usb_device *);
+		/* Reset the device schedule to the last known good schedule,
+		 * which was set from a previous successful call to
+		 * check_bandwidth().  This reverts any add_endpoint() and
+		 * drop_endpoint() calls since that last successful call.
+		 * Used for when a check_bandwidth() call fails due to resource
+		 * or bandwidth constraints.
+		 */
+	void	(*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
+		/* Returns the hardware-chosen device address */
+	int	(*address_device)(struct usb_hcd *, struct usb_device *udev);
 };
 
 extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
@@ -242,6 +281,9 @@ extern void usb_hcd_disable_endpoint(struct usb_device *udev,
 extern void usb_hcd_reset_endpoint(struct usb_device *udev,
 		struct usb_host_endpoint *ep);
 extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
+extern int usb_hcd_check_bandwidth(struct usb_device *udev,
+		struct usb_host_config *new_config,
+		struct usb_interface *new_intf);
 extern int usb_hcd_get_frame_number(struct usb_device *udev);
 
 extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
@@ -261,14 +303,11 @@ struct pci_device_id;
 extern int usb_hcd_pci_probe(struct pci_dev *dev,
 				const struct pci_device_id *id);
 extern void usb_hcd_pci_remove(struct pci_dev *dev);
-
-#ifdef CONFIG_PM
-extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg);
-extern int usb_hcd_pci_resume(struct pci_dev *dev);
-#endif /* CONFIG_PM */
-
 extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 
+#ifdef CONFIG_PM_SLEEP
+extern struct dev_pm_ops	usb_hcd_pci_pm_ops;
+#endif
 #endif /* CONFIG_PCI */
 
 /* pci-ish (pdev null is ok) buffer alloc/mapping support */
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index be86ae3f4088..2af3b4f06054 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -155,6 +155,8 @@ static inline char *portspeed(int portstatus)
     		return "480 Mb/s";
 	else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
 		return "1.5 Mb/s";
+	else if (portstatus & (1 << USB_PORT_FEAT_SUPERSPEED))
+		return "5.0 Gb/s";
 	else
 		return "12 Mb/s";
 }
@@ -457,13 +459,13 @@ static void hub_tt_kevent (struct work_struct *work)
 
 	spin_lock_irqsave (&hub->tt.lock, flags);
 	while (--limit && !list_empty (&hub->tt.clear_list)) {
-		struct list_head	*temp;
+		struct list_head	*next;
 		struct usb_tt_clear	*clear;
 		struct usb_device	*hdev = hub->hdev;
 		int			status;
 
-		temp = hub->tt.clear_list.next;
-		clear = list_entry (temp, struct usb_tt_clear, clear_list);
+		next = hub->tt.clear_list.next;
+		clear = list_entry (next, struct usb_tt_clear, clear_list);
 		list_del (&clear->clear_list);
 
 		/* drop lock so HCD can concurrently report other TT errors */
@@ -951,6 +953,9 @@ static int hub_configure(struct usb_hub *hub,
 					ret);
 			hub->tt.hub = hdev;
 			break;
+		case 3:
+			/* USB 3.0 hubs don't have a TT */
+			break;
 		default:
 			dev_dbg(hub_dev, "Unrecognized hub protocol %d\n",
 				hdev->descriptor.bDeviceProtocol);
@@ -1323,6 +1328,11 @@ EXPORT_SYMBOL_GPL(usb_set_device_state);
  * 0 is reserved by USB for default address; (b) Linux's USB stack
  * uses always #1 for the root hub of the controller. So USB stack's
  * port #1, which is wusb virtual-port #0 has address #2.
+ *
+ * Devices connected under xHCI are not as simple.  The host controller
+ * supports virtualization, so the hardware assigns device addresses and
+ * the HCD must setup data structures before issuing a set address
+ * command to the hardware.
  */
 static void choose_address(struct usb_device *udev)
 {
@@ -1642,6 +1652,9 @@ int usb_new_device(struct usb_device *udev)
 	err = usb_configure_device(udev);	/* detect & probe dev/intfs */
 	if (err < 0)
 		goto fail;
+	dev_dbg(&udev->dev, "udev %d, busnum %d, minor = %d\n",
+			udev->devnum, udev->bus->busnum,
+			(((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
 	/* export the usbdev device-node for libusb */
 	udev->dev.devt = MKDEV(USB_DEVICE_MAJOR,
 			(((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
@@ -2395,19 +2408,29 @@ EXPORT_SYMBOL_GPL(usb_ep0_reinit);
 static int hub_set_address(struct usb_device *udev, int devnum)
 {
 	int retval;
+	struct usb_hcd *hcd = bus_to_hcd(udev->bus);
 
-	if (devnum <= 1)
+	/*
+	 * The host controller will choose the device address,
+	 * instead of the core having chosen it earlier
+	 */
+	if (!hcd->driver->address_device && devnum <= 1)
 		return -EINVAL;
 	if (udev->state == USB_STATE_ADDRESS)
 		return 0;
 	if (udev->state != USB_STATE_DEFAULT)
 		return -EINVAL;
-	retval = usb_control_msg(udev, usb_sndaddr0pipe(),
-		USB_REQ_SET_ADDRESS, 0, devnum, 0,
-		NULL, 0, USB_CTRL_SET_TIMEOUT);
+	if (hcd->driver->address_device) {
+		retval = hcd->driver->address_device(hcd, udev);
+	} else {
+		retval = usb_control_msg(udev, usb_sndaddr0pipe(),
+				USB_REQ_SET_ADDRESS, 0, devnum, 0,
+				NULL, 0, USB_CTRL_SET_TIMEOUT);
+		if (retval == 0)
+			update_address(udev, devnum);
+	}
 	if (retval == 0) {
 		/* Device now using proper address. */
-		update_address(udev, devnum);
 		usb_set_device_state(udev, USB_STATE_ADDRESS);
 		usb_ep0_reinit(udev);
 	}
@@ -2430,6 +2453,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 	static DEFINE_MUTEX(usb_address0_mutex);
 
 	struct usb_device	*hdev = hub->hdev;
+	struct usb_hcd		*hcd = bus_to_hcd(hdev->bus);
 	int			i, j, retval;
 	unsigned		delay = HUB_SHORT_RESET_TIME;
 	enum usb_device_speed	oldspeed = udev->speed;
@@ -2452,11 +2476,24 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 
 	mutex_lock(&usb_address0_mutex);
 
-	/* Reset the device; full speed may morph to high speed */
-	retval = hub_port_reset(hub, port1, udev, delay);
-	if (retval < 0)		/* error or disconnect */
+	if ((hcd->driver->flags & HCD_USB3) && udev->config) {
+		/* FIXME this will need special handling by the xHCI driver. */
+		dev_dbg(&udev->dev,
+				"xHCI reset of configured device "
+				"not supported yet.\n");
+		retval = -EINVAL;
 		goto fail;
-				/* success, speed is known */
+	} else if (!udev->config && oldspeed == USB_SPEED_SUPER) {
+		/* Don't reset USB 3.0 devices during an initial setup */
+		usb_set_device_state(udev, USB_STATE_DEFAULT);
+	} else {
+		/* Reset the device; full speed may morph to high speed */
+		/* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
+		retval = hub_port_reset(hub, port1, udev, delay);
+		if (retval < 0)		/* error or disconnect */
+			goto fail;
+		/* success, speed is known */
+	}
 	retval = -ENODEV;
 
 	if (oldspeed != USB_SPEED_UNKNOWN && oldspeed != udev->speed) {
@@ -2471,6 +2508,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 	 * reported as 0xff in the device descriptor). WUSB1.0[4.8.1].
 	 */
 	switch (udev->speed) {
+	case USB_SPEED_SUPER:
 	case USB_SPEED_VARIABLE:	/* fixed at 512 */
 		udev->ep0.desc.wMaxPacketSize = cpu_to_le16(512);
 		break;
@@ -2496,16 +2534,20 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 	case USB_SPEED_LOW:	speed = "low";	break;
 	case USB_SPEED_FULL:	speed = "full";	break;
 	case USB_SPEED_HIGH:	speed = "high";	break;
+	case USB_SPEED_SUPER:
+				speed = "super";
+				break;
 	case USB_SPEED_VARIABLE:
 				speed = "variable";
 				type = "Wireless ";
 				break;
 	default: 		speed = "?";	break;
 	}
-	dev_info (&udev->dev,
-		  "%s %s speed %sUSB device using %s and address %d\n",
-		  (udev->config) ? "reset" : "new", speed, type,
-		  udev->bus->controller->driver->name, devnum);
+	if (udev->speed != USB_SPEED_SUPER)
+		dev_info(&udev->dev,
+				"%s %s speed %sUSB device using %s and address %d\n",
+				(udev->config) ? "reset" : "new", speed, type,
+				udev->bus->controller->driver->name, devnum);
 
 	/* Set up TT records, if needed  */
 	if (hdev->tt) {
@@ -2530,7 +2572,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 	 * value.
 	 */
 	for (i = 0; i < GET_DESCRIPTOR_TRIES; (++i, msleep(100))) {
-		if (USE_NEW_SCHEME(retry_counter)) {
+		/*
+		 * An xHCI controller cannot send any packets to a device until
+		 * a set address command successfully completes.
+		 */
+		if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3)) {
 			struct usb_device_descriptor *buf;
 			int r = 0;
 
@@ -2596,7 +2642,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
  		 * unauthorized address in the Connect Ack sequence;
  		 * authorization will assign the final address.
  		 */
- 		if (udev->wusb == 0) {
+		if (udev->wusb == 0) {
 			for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
 				retval = hub_set_address(udev, devnum);
 				if (retval >= 0)
@@ -2609,13 +2655,20 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 					devnum, retval);
 				goto fail;
 			}
+			if (udev->speed == USB_SPEED_SUPER) {
+				devnum = udev->devnum;
+				dev_info(&udev->dev,
+						"%s SuperSpeed USB device using %s and address %d\n",
+						(udev->config) ? "reset" : "new",
+						udev->bus->controller->driver->name, devnum);
+			}
 
 			/* cope with hardware quirkiness:
 			 *  - let SET_ADDRESS settle, some device hardware wants it
 			 *  - read ep0 maxpacket even for high and low speed,
 			 */
 			msleep(10);
-			if (USE_NEW_SCHEME(retry_counter))
+			if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3))
 				break;
   		}
 
@@ -2634,8 +2687,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
 	if (retval)
 		goto fail;
 
-	i = udev->descriptor.bMaxPacketSize0 == 0xff?	/* wusb device? */
-	    512 : udev->descriptor.bMaxPacketSize0;
+	if (udev->descriptor.bMaxPacketSize0 == 0xff ||
+			udev->speed == USB_SPEED_SUPER)
+		i = 512;
+	else
+		i = udev->descriptor.bMaxPacketSize0;
 	if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
 		if (udev->speed != USB_SPEED_FULL ||
 				!(i == 8 || i == 16 || i == 32 || i == 64)) {
@@ -2847,19 +2903,41 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
 		}
 
 		usb_set_device_state(udev, USB_STATE_POWERED);
-		udev->speed = USB_SPEED_UNKNOWN;
  		udev->bus_mA = hub->mA_per_port;
 		udev->level = hdev->level + 1;
 		udev->wusb = hub_is_wusb(hub);
 
-		/* set the address */
-		choose_address(udev);
-		if (udev->devnum <= 0) {
-			status = -ENOTCONN;	/* Don't retry */
-			goto loop;
+		/*
+		 * USB 3.0 devices are reset automatically before the connect
+		 * port status change appears, and the root hub port status
+		 * shows the correct speed.  We also get port change
+		 * notifications for USB 3.0 devices from the USB 3.0 portion of
+		 * an external USB 3.0 hub, but this isn't handled correctly yet
+		 * FIXME.
+		 */
+
+		if (!(hcd->driver->flags & HCD_USB3))
+			udev->speed = USB_SPEED_UNKNOWN;
+		else if ((hdev->parent == NULL) &&
+				(portstatus & (1 << USB_PORT_FEAT_SUPERSPEED)))
+			udev->speed = USB_SPEED_SUPER;
+		else
+			udev->speed = USB_SPEED_UNKNOWN;
+
+		/*
+		 * xHCI needs to issue an address device command later
+		 * in the hub_port_init sequence for SS/HS/FS/LS devices.
+		 */
+		if (!(hcd->driver->flags & HCD_USB3)) {
+			/* set the address */
+			choose_address(udev);
+			if (udev->devnum <= 0) {
+				status = -ENOTCONN;	/* Don't retry */
+				goto loop;
+			}
 		}
 
-		/* reset and get descriptor */
+		/* reset (non-USB 3.0 devices) and get descriptor */
 		status = hub_port_init(hub, udev, port1, i);
 		if (status < 0)
 			goto loop;
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 2a116ce53c9b..889c0f32a40b 100644
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -47,7 +47,10 @@
 #define USB_PORT_FEAT_L1		5	/* L1 suspend */
 #define USB_PORT_FEAT_POWER		8
 #define USB_PORT_FEAT_LOWSPEED		9
+/* This value was never in Table 11-17 */
 #define USB_PORT_FEAT_HIGHSPEED		10
+/* This value is also fake */
+#define USB_PORT_FEAT_SUPERSPEED	11
 #define USB_PORT_FEAT_C_CONNECTION	16
 #define USB_PORT_FEAT_C_ENABLE		17
 #define USB_PORT_FEAT_C_SUSPEND		18
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index b62628377654..2bed83caacb1 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -10,6 +10,7 @@
 #include <linux/mm.h>
 #include <linux/timer.h>
 #include <linux/ctype.h>
+#include <linux/nls.h>
 #include <linux/device.h>
 #include <linux/scatterlist.h>
 #include <linux/usb/quirks.h>
@@ -364,6 +365,7 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
 	int i;
 	int urb_flags;
 	int dma;
+	int use_sg;
 
 	if (!io || !dev || !sg
 			|| usb_pipecontrol(pipe)
@@ -391,7 +393,19 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
 	if (io->entries <= 0)
 		return io->entries;
 
-	io->urbs = kmalloc(io->entries * sizeof *io->urbs, mem_flags);
+	/* If we're running on an xHCI host controller, queue the whole scatter
+	 * gather list with one call to urb_enqueue().  This is only for bulk,
+	 * as that endpoint type does not care how the data gets broken up
+	 * across frames.
+	 */
+	if (usb_pipebulk(pipe) &&
+			bus_to_hcd(dev->bus)->driver->flags & HCD_USB3) {
+		io->urbs = kmalloc(sizeof *io->urbs, mem_flags);
+		use_sg = true;
+	} else {
+		io->urbs = kmalloc(io->entries * sizeof *io->urbs, mem_flags);
+		use_sg = false;
+	}
 	if (!io->urbs)
 		goto nomem;
 
@@ -401,62 +415,92 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
 	if (usb_pipein(pipe))
 		urb_flags |= URB_SHORT_NOT_OK;
 
-	for_each_sg(sg, sg, io->entries, i) {
-		unsigned len;
-
-		io->urbs[i] = usb_alloc_urb(0, mem_flags);
-		if (!io->urbs[i]) {
-			io->entries = i;
+	if (use_sg) {
+		io->urbs[0] = usb_alloc_urb(0, mem_flags);
+		if (!io->urbs[0]) {
+			io->entries = 0;
 			goto nomem;
 		}
 
-		io->urbs[i]->dev = NULL;
-		io->urbs[i]->pipe = pipe;
-		io->urbs[i]->interval = period;
-		io->urbs[i]->transfer_flags = urb_flags;
-
-		io->urbs[i]->complete = sg_complete;
-		io->urbs[i]->context = io;
-
-		/*
-		 * Some systems need to revert to PIO when DMA is temporarily
-		 * unavailable.  For their sakes, both transfer_buffer and
-		 * transfer_dma are set when possible.  However this can only
-		 * work on systems without:
-		 *
-		 *  - HIGHMEM, since DMA buffers located in high memory are
-		 *    not directly addressable by the CPU for PIO;
-		 *
-		 *  - IOMMU, since dma_map_sg() is allowed to use an IOMMU to
-		 *    make virtually discontiguous buffers be "dma-contiguous"
-		 *    so that PIO and DMA need diferent numbers of URBs.
-		 *
-		 * So when HIGHMEM or IOMMU are in use, transfer_buffer is NULL
-		 * to prevent stale pointers and to help spot bugs.
-		 */
-		if (dma) {
-			io->urbs[i]->transfer_dma = sg_dma_address(sg);
-			len = sg_dma_len(sg);
+		io->urbs[0]->dev = NULL;
+		io->urbs[0]->pipe = pipe;
+		io->urbs[0]->interval = period;
+		io->urbs[0]->transfer_flags = urb_flags;
+
+		io->urbs[0]->complete = sg_complete;
+		io->urbs[0]->context = io;
+		/* A length of zero means transfer the whole sg list */
+		io->urbs[0]->transfer_buffer_length = length;
+		if (length == 0) {
+			for_each_sg(sg, sg, io->entries, i) {
+				io->urbs[0]->transfer_buffer_length +=
+					sg_dma_len(sg);
+			}
+		}
+		io->urbs[0]->sg = io;
+		io->urbs[0]->num_sgs = io->entries;
+		io->entries = 1;
+	} else {
+		for_each_sg(sg, sg, io->entries, i) {
+			unsigned len;
+
+			io->urbs[i] = usb_alloc_urb(0, mem_flags);
+			if (!io->urbs[i]) {
+				io->entries = i;
+				goto nomem;
+			}
+
+			io->urbs[i]->dev = NULL;
+			io->urbs[i]->pipe = pipe;
+			io->urbs[i]->interval = period;
+			io->urbs[i]->transfer_flags = urb_flags;
+
+			io->urbs[i]->complete = sg_complete;
+			io->urbs[i]->context = io;
+
+			/*
+			 * Some systems need to revert to PIO when DMA is
+			 * temporarily unavailable.  For their sakes, both
+			 * transfer_buffer and transfer_dma are set when
+			 * possible.  However this can only work on systems
+			 * without:
+			 *
+			 *  - HIGHMEM, since DMA buffers located in high memory
+			 *    are not directly addressable by the CPU for PIO;
+			 *
+			 *  - IOMMU, since dma_map_sg() is allowed to use an
+			 *    IOMMU to make virtually discontiguous buffers be
+			 *    "dma-contiguous" so that PIO and DMA need diferent
+			 *    numbers of URBs.
+			 *
+			 * So when HIGHMEM or IOMMU are in use, transfer_buffer
+			 * is NULL to prevent stale pointers and to help spot
+			 * bugs.
+			 */
+			if (dma) {
+				io->urbs[i]->transfer_dma = sg_dma_address(sg);
+				len = sg_dma_len(sg);
 #if defined(CONFIG_HIGHMEM) || defined(CONFIG_GART_IOMMU)
-			io->urbs[i]->transfer_buffer = NULL;
+				io->urbs[i]->transfer_buffer = NULL;
 #else
-			io->urbs[i]->transfer_buffer = sg_virt(sg);
+				io->urbs[i]->transfer_buffer = sg_virt(sg);
 #endif
-		} else {
-			/* hc may use _only_ transfer_buffer */
-			io->urbs[i]->transfer_buffer = sg_virt(sg);
-			len = sg->length;
-		}
+			} else {
+				/* hc may use _only_ transfer_buffer */
+				io->urbs[i]->transfer_buffer = sg_virt(sg);
+				len = sg->length;
+			}
 
-		if (length) {
-			len = min_t(unsigned, len, length);
-			length -= len;
-			if (length == 0)
-				io->entries = i + 1;
+			if (length) {
+				len = min_t(unsigned, len, length);
+				length -= len;
+				if (length == 0)
+					io->entries = i + 1;
+			}
+			io->urbs[i]->transfer_buffer_length = len;
 		}
-		io->urbs[i]->transfer_buffer_length = len;
+		io->urbs[--i]->transfer_flags &= ~URB_NO_INTERRUPT;
 	}
-	io->urbs[--i]->transfer_flags &= ~URB_NO_INTERRUPT;
 
 	/* transaction state */
 	io->count = io->entries;
@@ -509,6 +553,10 @@ EXPORT_SYMBOL_GPL(usb_sg_init);
  * could be transferred.  That capability is less useful for low or full
  * speed interrupt endpoints, which allow at most one packet per millisecond,
  * of at most 8 or 64 bytes (respectively).
+ *
+ * It is not necessary to call this function to reserve bandwidth for devices
+ * under an xHCI host controller, as the bandwidth is reserved when the
+ * configuration or interface alt setting is selected.
  */
 void usb_sg_wait(struct usb_sg_request *io)
 {
@@ -759,7 +807,7 @@ static int usb_string_sub(struct usb_device *dev, unsigned int langid,
 }
 
 /**
- * usb_string - returns ISO 8859-1 version of a string descriptor
+ * usb_string - returns UTF-8 version of a string descriptor
  * @dev: the device whose string descriptor is being retrieved
  * @index: the number of the descriptor
  * @buf: where to put the string
@@ -767,17 +815,10 @@ static int usb_string_sub(struct usb_device *dev, unsigned int langid,
  * Context: !in_interrupt ()
  *
  * This converts the UTF-16LE encoded strings returned by devices, from
- * usb_get_string_descriptor(), to null-terminated ISO-8859-1 encoded ones
- * that are more usable in most kernel contexts.  Note that all characters
- * in the chosen descriptor that can't be encoded using ISO-8859-1
- * are converted to the question mark ("?") character, and this function
+ * usb_get_string_descriptor(), to null-terminated UTF-8 encoded ones
+ * that are more usable in most kernel contexts.  Note that this function
  * chooses strings in the first language supported by the device.
  *
- * The ASCII (or, redundantly, "US-ASCII") character set is the seven-bit
- * subset of ISO 8859-1. ISO-8859-1 is the eight-bit subset of Unicode,
- * and is appropriate for use many uses of English and several other
- * Western European languages.  (But it doesn't include the "Euro" symbol.)
- *
  * This call is synchronous, and may not be used in an interrupt context.
  *
  * Returns length of the string (>= 0) or usb_control_msg status (< 0).
@@ -786,7 +827,6 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
 {
 	unsigned char *tbuf;
 	int err;
-	unsigned int u, idx;
 
 	if (dev->state == USB_STATE_SUSPENDED)
 		return -EHOSTUNREACH;
@@ -821,16 +861,9 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
 		goto errout;
 
 	size--;		/* leave room for trailing NULL char in output buffer */
-	for (idx = 0, u = 2; u < err; u += 2) {
-		if (idx >= size)
-			break;
-		if (tbuf[u+1])			/* high byte */
-			buf[idx++] = '?';  /* non ISO-8859-1 character */
-		else
-			buf[idx++] = tbuf[u];
-	}
-	buf[idx] = 0;
-	err = idx;
+	err = utf16s_to_utf8s((wchar_t *) &tbuf[2], (err - 2) / 2,
+			UTF16_LITTLE_ENDIAN, buf, size);
+	buf[err] = 0;
 
 	if (tbuf[1] != USB_DT_STRING)
 		dev_dbg(&dev->dev,
@@ -843,6 +876,9 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
 }
 EXPORT_SYMBOL_GPL(usb_string);
 
+/* one UTF-8-encoded 16-bit character has at most three bytes */
+#define MAX_USB_STRING_SIZE (127 * 3 + 1)
+
 /**
  * usb_cache_string - read a string descriptor and cache it for later use
  * @udev: the device whose string descriptor is being read
@@ -860,9 +896,9 @@ char *usb_cache_string(struct usb_device *udev, int index)
 	if (index <= 0)
 		return NULL;
 
-	buf = kmalloc(256, GFP_KERNEL);
+	buf = kmalloc(MAX_USB_STRING_SIZE, GFP_KERNEL);
 	if (buf) {
-		len = usb_string(udev, index, buf, 256);
+		len = usb_string(udev, index, buf, MAX_USB_STRING_SIZE);
 		if (len > 0) {
 			smallbuf = kmalloc(++len, GFP_KERNEL);
 			if (!smallbuf)
@@ -1664,6 +1700,21 @@ free_interfaces:
 	if (ret)
 		goto free_interfaces;
 
+	/* Make sure we have bandwidth (and available HCD resources) for this
+	 * configuration.  Remove endpoints from the schedule if we're dropping
+	 * this configuration to set configuration 0.  After this point, the
+	 * host controller will not allow submissions to dropped endpoints.  If
+	 * this call fails, the device state is unchanged.
+	 */
+	if (cp)
+		ret = usb_hcd_check_bandwidth(dev, cp, NULL);
+	else
+		ret = usb_hcd_check_bandwidth(dev, NULL, NULL);
+	if (ret < 0) {
+		usb_autosuspend_device(dev);
+		goto free_interfaces;
+	}
+
 	/* if it's already configured, clear out old state first.
 	 * getting rid of old interfaces means unbinding their drivers.
 	 */
@@ -1686,6 +1737,7 @@ free_interfaces:
 	dev->actconfig = cp;
 	if (!cp) {
 		usb_set_device_state(dev, USB_STATE_ADDRESS);
+		usb_hcd_check_bandwidth(dev, NULL, NULL);
 		usb_autosuspend_device(dev);
 		goto free_interfaces;
 	}
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index c66789197927..b5c72e458943 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -552,8 +552,8 @@ static struct attribute *dev_string_attrs[] = {
 static mode_t dev_string_attrs_are_visible(struct kobject *kobj,
 		struct attribute *a, int n)
 {
-	struct usb_device *udev = to_usb_device(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
 
 	if (a == &dev_attr_manufacturer.attr) {
 		if (udev->manufacturer == NULL)
@@ -585,8 +585,8 @@ static ssize_t
 read_descriptors(struct kobject *kobj, struct bin_attribute *attr,
 		char *buf, loff_t off, size_t count)
 {
-	struct usb_device *udev = to_usb_device(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_device *udev = to_usb_device(dev);
 	size_t nleft = count;
 	size_t srclen, n;
 	int cfgno;
@@ -786,8 +786,8 @@ static struct attribute *intf_assoc_attrs[] = {
 static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
 		struct attribute *a, int n)
 {
-	struct usb_interface *intf = to_usb_interface(
-			container_of(kobj, struct device, kobj));
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct usb_interface *intf = to_usb_interface(dev);
 
 	if (intf->intf_assoc == NULL)
 		return 0;
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 3376055f36e7..0885d4abdc62 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -241,6 +241,12 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb);
  * If the USB subsystem can't allocate sufficient bandwidth to perform
  * the periodic request, submitting such a periodic request should fail.
  *
+ * For devices under xHCI, the bandwidth is reserved at configuration time, or
+ * when the alt setting is selected.  If there is not enough bus bandwidth, the
+ * configuration/alt setting request will fail.  Therefore, submissions to
+ * periodic endpoints on devices under xHCI should never fail due to bandwidth
+ * constraints.
+ *
  * Device drivers must explicitly request that repetition, by ensuring that
  * some URB is always on the endpoint's queue (except possibly for short
  * periods during completion callacks).  When there is no longer an urb
@@ -351,6 +357,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
 	if (xfertype == USB_ENDPOINT_XFER_ISOC) {
 		int	n, len;
 
+		/* FIXME SuperSpeed isoc endpoints have up to 16 bursts */
 		/* "high bandwidth" mode, 1-3 packets/uframe? */
 		if (dev->speed == USB_SPEED_HIGH) {
 			int	mult = 1 + ((max >> 11) & 0x03);
@@ -426,6 +433,11 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
 			return -EINVAL;
 		/* too big? */
 		switch (dev->speed) {
+		case USB_SPEED_SUPER:	/* units are 125us */
+			/* Handle up to 2^(16-1) microframes */
+			if (urb->interval > (1 << 15))
+				return -EINVAL;
+			max = 1 << 15;
 		case USB_SPEED_HIGH:	/* units are microframes */
 			/* NOTE usb handles 2^15 */
 			if (urb->interval > (1024 * 8))
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 927a27dd2f85..00f1fc8bcc92 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -34,6 +34,7 @@
 #include <linux/usb.h>
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
+#include <linux/debugfs.h>
 
 #include <asm/io.h>
 #include <linux/scatterlist.h>
@@ -184,11 +185,16 @@ EXPORT_SYMBOL_GPL(usb_find_interface);
 static void usb_release_dev(struct device *dev)
 {
 	struct usb_device *udev;
+	struct usb_hcd *hcd;
 
 	udev = to_usb_device(dev);
+	hcd = bus_to_hcd(udev->bus);
 
 	usb_destroy_configuration(udev);
-	usb_put_hcd(bus_to_hcd(udev->bus));
+	/* Root hubs aren't real devices, so don't free HCD resources */
+	if (hcd->driver->free_dev && udev->parent)
+		hcd->driver->free_dev(hcd, udev);
+	usb_put_hcd(hcd);
 	kfree(udev->product);
 	kfree(udev->manufacturer);
 	kfree(udev->serial);
@@ -359,6 +365,13 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 		kfree(dev);
 		return NULL;
 	}
+	/* Root hubs aren't true devices, so don't allocate HCD resources */
+	if (usb_hcd->driver->alloc_dev && parent &&
+		!usb_hcd->driver->alloc_dev(usb_hcd, dev)) {
+		usb_put_hcd(bus_to_hcd(bus));
+		kfree(dev);
+		return NULL;
+	}
 
 	device_initialize(&dev->dev);
 	dev->dev.bus = &usb_bus_type;
@@ -386,18 +399,24 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
 	 */
 	if (unlikely(!parent)) {
 		dev->devpath[0] = '0';
+		dev->route = 0;
 
 		dev->dev.parent = bus->controller;
 		dev_set_name(&dev->dev, "usb%d", bus->busnum);
 		root_hub = 1;
 	} else {
 		/* match any labeling on the hubs; it's one-based */
-		if (parent->devpath[0] == '0')
+		if (parent->devpath[0] == '0') {
 			snprintf(dev->devpath, sizeof dev->devpath,
 				"%d", port1);
-		else
+			/* Root ports are not counted in route string */
+			dev->route = 0;
+		} else {
 			snprintf(dev->devpath, sizeof dev->devpath,
 				"%s.%d", parent->devpath, port1);
+			dev->route = parent->route +
+				(port1 << ((parent->level - 1)*4));
+		}
 
 		dev->dev.parent = &parent->dev;
 		dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath);
@@ -1012,6 +1031,35 @@ static struct notifier_block usb_bus_nb = {
 	.notifier_call = usb_bus_notify,
 };
 
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
+
+struct dentry *usb_debug_devices;
+
+static int usb_debugfs_init(void)
+{
+	usb_debug_root = debugfs_create_dir("usb", NULL);
+	if (!usb_debug_root)
+		return -ENOENT;
+
+	usb_debug_devices = debugfs_create_file("devices", 0444,
+						usb_debug_root, NULL,
+						&usbfs_devices_fops);
+	if (!usb_debug_devices) {
+		debugfs_remove(usb_debug_root);
+		usb_debug_root = NULL;
+		return -ENOENT;
+	}
+
+	return 0;
+}
+
+static void usb_debugfs_cleanup(void)
+{
+	debugfs_remove(usb_debug_devices);
+	debugfs_remove(usb_debug_root);
+}
+
 /*
  * Init
  */
@@ -1023,6 +1071,10 @@ static int __init usb_init(void)
 		return 0;
 	}
 
+	retval = usb_debugfs_init();
+	if (retval)
+		goto out;
+
 	retval = ksuspend_usb_init();
 	if (retval)
 		goto out;
@@ -1032,9 +1084,6 @@ static int __init usb_init(void)
 	retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
 	if (retval)
 		goto bus_notifier_failed;
-	retval = usb_host_init();
-	if (retval)
-		goto host_init_failed;
 	retval = usb_major_init();
 	if (retval)
 		goto major_init_failed;
@@ -1064,8 +1113,6 @@ usb_devio_init_failed:
 driver_register_failed:
 	usb_major_cleanup();
 major_init_failed:
-	usb_host_cleanup();
-host_init_failed:
 	bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
 bus_notifier_failed:
 	bus_unregister(&usb_bus_type);
@@ -1090,10 +1137,10 @@ static void __exit usb_exit(void)
 	usb_deregister(&usbfs_driver);
 	usb_devio_cleanup();
 	usb_hub_cleanup();
-	usb_host_cleanup();
 	bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
 	bus_unregister(&usb_bus_type);
 	ksuspend_usb_cleanup();
+	usb_debugfs_cleanup();
 }
 
 subsys_initcall(usb_init);
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 79d8a9ea559b..dabf9255a10e 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -41,8 +41,6 @@ extern int  usb_hub_init(void);
 extern void usb_hub_cleanup(void);
 extern int usb_major_init(void);
 extern void usb_major_cleanup(void);
-extern int usb_host_init(void);
-extern void usb_host_cleanup(void);
 
 #ifdef	CONFIG_PM
 
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 080bb1e4b847..772dd3b9bab9 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -253,7 +253,7 @@ config USB_PXA25X_SMALL
 
 config USB_GADGET_PXA27X
 	boolean "PXA 27x"
-	depends on ARCH_PXA && PXA27x
+	depends on ARCH_PXA && (PXA27x || PXA3xx)
 	select USB_OTG_UTILS
 	help
 	   Intel's PXA 27x series XScale ARM v5TE processors include
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 53bcdd2f8282..72bae8f39d81 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -485,7 +485,7 @@ static int at91_ep_enable(struct usb_ep *_ep,
 		return -ESHUTDOWN;
 	}
 
-	tmp = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+	tmp = usb_endpoint_type(desc);
 	switch (tmp) {
 	case USB_ENDPOINT_XFER_CONTROL:
 		DBG("only one control endpoint\n");
@@ -517,7 +517,7 @@ ok:
 	local_irq_save(flags);
 
 	/* initialize endpoint to match this descriptor */
-	ep->is_in = (desc->bEndpointAddress & USB_DIR_IN) != 0;
+	ep->is_in = usb_endpoint_dir_in(desc);
 	ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC);
 	ep->stopped = 0;
 	if (ep->is_in)
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 05c913cc3658..7a8f4421924c 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -550,12 +550,12 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	DBG(DBG_HW, "%s: EPT_SIZE = %lu (maxpacket = %lu)\n",
 			ep->ep.name, ept_cfg, maxpacket);
 
-	if ((desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) {
+	if (usb_endpoint_dir_in(desc)) {
 		ep->is_in = 1;
 		ept_cfg |= USBA_EPT_DIR_IN;
 	}
 
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+	switch (usb_endpoint_type(desc)) {
 	case USB_ENDPOINT_XFER_CONTROL:
 		ept_cfg |= USBA_BF(EPT_TYPE, USBA_EPT_TYPE_CONTROL);
 		ept_cfg |= USBA_BF(BK_NUMBER, USBA_BK_NUMBER_ONE);
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 38e531ecae4d..c7cb87a6fee2 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -1977,9 +1977,9 @@ static int ep_enable(struct usb_ep *ep,
 	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->dir  = usb_endpoint_dir_in(desc) ? TX : RX;
+	mEp->num  = usb_endpoint_num(desc);
+	mEp->type = usb_endpoint_type(desc);
 
 	mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
 
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 381a53b3e11c..1e6aa504d58a 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -248,6 +248,8 @@
 #include <linux/freezer.h>
 #include <linux/utsname.h>
 
+#include <asm/unaligned.h>
+
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
@@ -799,29 +801,9 @@ static int fsg_set_halt(struct fsg_dev *fsg, struct usb_ep *ep)
 
 /* Routines for unaligned data access */
 
-static u16 get_be16(u8 *buf)
-{
-	return ((u16) buf[0] << 8) | ((u16) buf[1]);
-}
-
-static u32 get_be32(u8 *buf)
-{
-	return ((u32) buf[0] << 24) | ((u32) buf[1] << 16) |
-			((u32) buf[2] << 8) | ((u32) buf[3]);
-}
-
-static void put_be16(u8 *buf, u16 val)
-{
-	buf[0] = val >> 8;
-	buf[1] = val;
-}
-
-static void put_be32(u8 *buf, u32 val)
+static u32 get_unaligned_be24(u8 *buf)
 {
-	buf[0] = val >> 24;
-	buf[1] = val >> 16;
-	buf[2] = val >> 8;
-	buf[3] = val & 0xff;
+	return 0xffffff & (u32) get_unaligned_be32(buf - 1);
 }
 
 
@@ -1582,9 +1564,9 @@ static int do_read(struct fsg_dev *fsg)
 	/* Get the starting Logical Block Address and check that it's
 	 * not too big */
 	if (fsg->cmnd[0] == SC_READ_6)
-		lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
+		lba = get_unaligned_be24(&fsg->cmnd[1]);
 	else {
-		lba = get_be32(&fsg->cmnd[2]);
+		lba = get_unaligned_be32(&fsg->cmnd[2]);
 
 		/* We allow DPO (Disable Page Out = don't save data in the
 		 * cache) and FUA (Force Unit Access = don't read from the
@@ -1717,9 +1699,9 @@ static int do_write(struct fsg_dev *fsg)
 	/* Get the starting Logical Block Address and check that it's
 	 * not too big */
 	if (fsg->cmnd[0] == SC_WRITE_6)
-		lba = (fsg->cmnd[1] << 16) | get_be16(&fsg->cmnd[2]);
+		lba = get_unaligned_be24(&fsg->cmnd[1]);
 	else {
-		lba = get_be32(&fsg->cmnd[2]);
+		lba = get_unaligned_be32(&fsg->cmnd[2]);
 
 		/* We allow DPO (Disable Page Out = don't save data in the
 		 * cache) and FUA (Force Unit Access = write directly to the
@@ -1940,7 +1922,7 @@ static int do_verify(struct fsg_dev *fsg)
 
 	/* Get the starting Logical Block Address and check that it's
 	 * not too big */
-	lba = get_be32(&fsg->cmnd[2]);
+	lba = get_unaligned_be32(&fsg->cmnd[2]);
 	if (lba >= curlun->num_sectors) {
 		curlun->sense_data = SS_LOGICAL_BLOCK_ADDRESS_OUT_OF_RANGE;
 		return -EINVAL;
@@ -1953,7 +1935,7 @@ static int do_verify(struct fsg_dev *fsg)
 		return -EINVAL;
 	}
 
-	verification_length = get_be16(&fsg->cmnd[7]);
+	verification_length = get_unaligned_be16(&fsg->cmnd[7]);
 	if (unlikely(verification_length == 0))
 		return -EIO;		// No default reply
 
@@ -2103,7 +2085,7 @@ static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 	memset(buf, 0, 18);
 	buf[0] = valid | 0x70;			// Valid, current error
 	buf[2] = SK(sd);
-	put_be32(&buf[3], sdinfo);		// Sense information
+	put_unaligned_be32(sdinfo, &buf[3]);	/* Sense information */
 	buf[7] = 18 - 8;			// Additional sense length
 	buf[12] = ASC(sd);
 	buf[13] = ASCQ(sd);
@@ -2114,7 +2096,7 @@ static int do_request_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 {
 	struct lun	*curlun = fsg->curlun;
-	u32		lba = get_be32(&fsg->cmnd[2]);
+	u32		lba = get_unaligned_be32(&fsg->cmnd[2]);
 	int		pmi = fsg->cmnd[8];
 	u8		*buf = (u8 *) bh->buf;
 
@@ -2124,8 +2106,9 @@ static int do_read_capacity(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 		return -EINVAL;
 	}
 
-	put_be32(&buf[0], curlun->num_sectors - 1);	// Max logical block
-	put_be32(&buf[4], 512);				// Block length
+	put_unaligned_be32(curlun->num_sectors - 1, &buf[0]);
+						/* Max logical block */
+	put_unaligned_be32(512, &buf[4]);	/* Block length */
 	return 8;
 }
 
@@ -2144,7 +2127,7 @@ static void store_cdrom_address(u8 *dest, int msf, u32 addr)
 		dest[0] = 0;		/* Reserved */
 	} else {
 		/* Absolute sector */
-		put_be32(dest, addr);
+		put_unaligned_be32(addr, dest);
 	}
 }
 
@@ -2152,7 +2135,7 @@ 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]);
+	u32		lba = get_unaligned_be32(&fsg->cmnd[2]);
 	u8		*buf = (u8 *) bh->buf;
 
 	if ((fsg->cmnd[1] & ~0x02) != 0) {		/* Mask away MSF */
@@ -2252,10 +2235,13 @@ static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 			buf[2] = 0x04;	// Write cache enable,
 					// Read cache not disabled
 					// No cache retention priorities
-			put_be16(&buf[4], 0xffff);  // Don't disable prefetch
-					// Minimum prefetch = 0
-			put_be16(&buf[8], 0xffff);  // Maximum prefetch
-			put_be16(&buf[10], 0xffff); // Maximum prefetch ceiling
+			put_unaligned_be16(0xffff, &buf[4]);
+					/* Don't disable prefetch */
+					/* Minimum prefetch = 0 */
+			put_unaligned_be16(0xffff, &buf[8]);
+					/* Maximum prefetch */
+			put_unaligned_be16(0xffff, &buf[10]);
+					/* Maximum prefetch ceiling */
 		}
 		buf += 12;
 	}
@@ -2272,7 +2258,7 @@ static int do_mode_sense(struct fsg_dev *fsg, struct fsg_buffhd *bh)
 	if (mscmnd == SC_MODE_SENSE_6)
 		buf0[0] = len - 1;
 	else
-		put_be16(buf0, len - 2);
+		put_unaligned_be16(len - 2, buf0);
 	return len;
 }
 
@@ -2360,9 +2346,10 @@ static int do_read_format_capacities(struct fsg_dev *fsg,
 	buf[3] = 8;		// Only the Current/Maximum Capacity Descriptor
 	buf += 4;
 
-	put_be32(&buf[0], curlun->num_sectors);		// Number of blocks
-	put_be32(&buf[4], 512);				// Block length
-	buf[4] = 0x02;					// Current capacity
+	put_unaligned_be32(curlun->num_sectors, &buf[0]);
+						/* Number of blocks */
+	put_unaligned_be32(512, &buf[4]);	/* Block length */
+	buf[4] = 0x02;				/* Current capacity */
 	return 12;
 }
 
@@ -2882,7 +2869,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_MODE_SELECT_10:
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+		fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
 		if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
 				(1<<1) | (3<<7), 0,
 				"MODE SELECT(10)")) == 0)
@@ -2898,7 +2885,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_MODE_SENSE_10:
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+		fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
 		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
 				(1<<1) | (1<<2) | (3<<7), 0,
 				"MODE SENSE(10)")) == 0)
@@ -2923,7 +2910,8 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_READ_10:
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
+		fsg->data_size_from_cmnd =
+				get_unaligned_be16(&fsg->cmnd[7]) << 9;
 		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
 				(1<<1) | (0xf<<2) | (3<<7), 1,
 				"READ(10)")) == 0)
@@ -2931,7 +2919,8 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_READ_12:
-		fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
+		fsg->data_size_from_cmnd =
+				get_unaligned_be32(&fsg->cmnd[6]) << 9;
 		if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
 				(1<<1) | (0xf<<2) | (0xf<<6), 1,
 				"READ(12)")) == 0)
@@ -2949,7 +2938,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
 	case SC_READ_HEADER:
 		if (!mod_data.cdrom)
 			goto unknown_cmnd;
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+		fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
 		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
 				(3<<7) | (0x1f<<1), 1,
 				"READ HEADER")) == 0)
@@ -2959,7 +2948,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
 	case SC_READ_TOC:
 		if (!mod_data.cdrom)
 			goto unknown_cmnd;
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+		fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
 		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
 				(7<<6) | (1<<1), 1,
 				"READ TOC")) == 0)
@@ -2967,7 +2956,7 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_READ_FORMAT_CAPACITIES:
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]);
+		fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
 		if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
 				(3<<7), 1,
 				"READ FORMAT CAPACITIES")) == 0)
@@ -3025,7 +3014,8 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_WRITE_10:
-		fsg->data_size_from_cmnd = get_be16(&fsg->cmnd[7]) << 9;
+		fsg->data_size_from_cmnd =
+				get_unaligned_be16(&fsg->cmnd[7]) << 9;
 		if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
 				(1<<1) | (0xf<<2) | (3<<7), 1,
 				"WRITE(10)")) == 0)
@@ -3033,7 +3023,8 @@ static int do_scsi_command(struct fsg_dev *fsg)
 		break;
 
 	case SC_WRITE_12:
-		fsg->data_size_from_cmnd = get_be32(&fsg->cmnd[6]) << 9;
+		fsg->data_size_from_cmnd =
+				get_unaligned_be32(&fsg->cmnd[6]) << 9;
 		if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
 				(1<<1) | (0xf<<2) | (0xf<<6), 1,
 				"WRITE(12)")) == 0)
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index de010c939dbb..112bb40a427c 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -110,10 +110,10 @@ goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 		return -EINVAL;
 	if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
 		return -ESHUTDOWN;
-	if (ep->num != (desc->bEndpointAddress & 0x0f))
+	if (ep->num != usb_endpoint_num(desc))
 		return -EINVAL;
 
-	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+	switch (usb_endpoint_type(desc)) {
 	case USB_ENDPOINT_XFER_BULK:
 	case USB_ENDPOINT_XFER_INT:
 		break;
@@ -142,7 +142,7 @@ goku_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 	/* ep1/ep2 dma direction is chosen early; it works in the other
 	 * direction, with pio.  be cautious with out-dma.
 	 */
-	ep->is_in = (USB_DIR_IN & desc->bEndpointAddress) != 0;
+	ep->is_in = usb_endpoint_dir_in(desc);
 	if (ep->is_in) {
 		mode |= 1;
 		ep->dma = (use_dma != 0) && (ep->num == UDC_MSTRD_ENDPOINT);
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index d20937f28a19..7d33f50b5874 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -384,9 +384,8 @@ ep_read (struct file *fd, char __user *buf, size_t len, loff_t *ptr)
 		return value;
 
 	/* halt any endpoint by doing a "wrong direction" i/o call */
-	if (data->desc.bEndpointAddress & USB_DIR_IN) {
-		if ((data->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
-				== USB_ENDPOINT_XFER_ISOC)
+	if (usb_endpoint_dir_in(&data->desc)) {
+		if (usb_endpoint_xfer_isoc(&data->desc))
 			return -EINVAL;
 		DBG (data->dev, "%s halt\n", data->name);
 		spin_lock_irq (&data->dev->lock);
@@ -428,9 +427,8 @@ ep_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
 		return value;
 
 	/* halt any endpoint by doing a "wrong direction" i/o call */
-	if (!(data->desc.bEndpointAddress & USB_DIR_IN)) {
-		if ((data->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
-				== USB_ENDPOINT_XFER_ISOC)
+	if (!usb_endpoint_dir_in(&data->desc)) {
+		if (usb_endpoint_xfer_isoc(&data->desc))
 			return -EINVAL;
 		DBG (data->dev, "%s halt\n", data->name);
 		spin_lock_irq (&data->dev->lock);
@@ -691,7 +689,7 @@ ep_aio_read(struct kiocb *iocb, const struct iovec *iov,
 	struct ep_data		*epdata = iocb->ki_filp->private_data;
 	char			*buf;
 
-	if (unlikely(epdata->desc.bEndpointAddress & USB_DIR_IN))
+	if (unlikely(usb_endpoint_dir_in(&epdata->desc)))
 		return -EINVAL;
 
 	buf = kmalloc(iocb->ki_left, GFP_KERNEL);
@@ -711,7 +709,7 @@ ep_aio_write(struct kiocb *iocb, const struct iovec *iov,
 	size_t			len = 0;
 	int			i = 0;
 
-	if (unlikely(!(epdata->desc.bEndpointAddress & USB_DIR_IN)))
+	if (unlikely(!usb_endpoint_dir_in(&epdata->desc)))
 		return -EINVAL;
 
 	buf = kmalloc(iocb->ki_left, GFP_KERNEL);
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 8cc676ecbb23..1937d8c7b433 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -38,7 +38,6 @@
 #include <linux/usb.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
-#include <mach/pxa2xx-regs.h> /* FIXME: for PSSR */
 #include <mach/udc.h>
 
 #include "pxa27x_udc.h"
@@ -474,6 +473,23 @@ static inline void udc_clear_mask_UDCCR(struct pxa_udc *udc, int mask)
 }
 
 /**
+ * ep_write_UDCCSR - set bits in UDCCSR
+ * @udc: udc device
+ * @mask: bits to set in UDCCR
+ *
+ * Sets bits in UDCCSR (UDCCSR0 and UDCCSR*).
+ *
+ * A specific case is applied to ep0 : the ACM bit is always set to 1, for
+ * SET_INTERFACE and SET_CONFIGURATION.
+ */
+static inline void ep_write_UDCCSR(struct pxa_ep *ep, int mask)
+{
+	if (is_ep0(ep))
+		mask |= UDCCSR0_ACM;
+	udc_ep_writel(ep, UDCCSR, mask);
+}
+
+/**
  * ep_count_bytes_remain - get how many bytes in udc endpoint
  * @ep: udc endpoint
  *
@@ -861,7 +877,7 @@ static int read_packet(struct pxa_ep *ep, struct pxa27x_request *req)
 		*buf++ = udc_ep_readl(ep, UDCDR);
 	req->req.actual += count;
 
-	udc_ep_writel(ep, UDCCSR, UDCCSR_PC);
+	ep_write_UDCCSR(ep, UDCCSR_PC);
 
 	return count;
 }
@@ -969,12 +985,12 @@ static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req)
 		if (udccsr & UDCCSR_PC) {
 			ep_vdbg(ep, "Clearing Transmit Complete, udccsr=%x\n",
 				udccsr);
-			udc_ep_writel(ep, UDCCSR, UDCCSR_PC);
+			ep_write_UDCCSR(ep, UDCCSR_PC);
 		}
 		if (udccsr & UDCCSR_TRN) {
 			ep_vdbg(ep, "Clearing Underrun on, udccsr=%x\n",
 				udccsr);
-			udc_ep_writel(ep, UDCCSR, UDCCSR_TRN);
+			ep_write_UDCCSR(ep, UDCCSR_TRN);
 		}
 
 		count = write_packet(ep, req, max);
@@ -996,7 +1012,7 @@ static int write_fifo(struct pxa_ep *ep, struct pxa27x_request *req)
 		}
 
 		if (is_short)
-			udc_ep_writel(ep, UDCCSR, UDCCSR_SP);
+			ep_write_UDCCSR(ep, UDCCSR_SP);
 
 		/* requests complete when all IN data is in the FIFO */
 		if (is_last) {
@@ -1029,7 +1045,7 @@ static int read_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req)
 
 	while (epout_has_pkt(ep)) {
 		count = read_packet(ep, req);
-		udc_ep_writel(ep, UDCCSR, UDCCSR0_OPC);
+		ep_write_UDCCSR(ep, UDCCSR0_OPC);
 		inc_ep_stats_bytes(ep, count, !USB_DIR_IN);
 
 		is_short = (count < ep->fifo_size);
@@ -1074,7 +1090,7 @@ static int write_ep0_fifo(struct pxa_ep *ep, struct pxa27x_request *req)
 
 	/* Sends either a short packet or a 0 length packet */
 	if (unlikely(is_short))
-		udc_ep_writel(ep, UDCCSR, UDCCSR0_IPR);
+		ep_write_UDCCSR(ep, UDCCSR0_IPR);
 
 	ep_dbg(ep, "in %d bytes%s%s, %d left, req=%p, udccsr0=0x%03x\n",
 		count, is_short ? "/S" : "", is_last ? "/L" : "",
@@ -1277,7 +1293,7 @@ static int pxa_ep_set_halt(struct usb_ep *_ep, int value)
 
 	/* FST, FEF bits are the same for control and non control endpoints */
 	rc = 0;
-	udc_ep_writel(ep, UDCCSR, UDCCSR_FST | UDCCSR_FEF);
+	ep_write_UDCCSR(ep, UDCCSR_FST | UDCCSR_FEF);
 	if (is_ep0(ep))
 		set_ep0state(ep->dev, STALL);
 
@@ -1343,7 +1359,7 @@ static void pxa_ep_fifo_flush(struct usb_ep *_ep)
 			udc_ep_readl(ep, UDCDR);
 	} else {
 		/* most IN status is the same, but ISO can't stall */
-		udc_ep_writel(ep, UDCCSR,
+		ep_write_UDCCSR(ep,
 				UDCCSR_PC | UDCCSR_FEF | UDCCSR_TRN
 				| (EPXFERTYPE_is_ISO(ep) ? 0 : UDCCSR_SST));
 	}
@@ -1728,6 +1744,7 @@ static void udc_enable(struct pxa_udc *udc)
 	memset(&udc->stats, 0, sizeof(udc->stats));
 
 	udc_set_mask_UDCCR(udc, UDCCR_UDE);
+	ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_ACM);
 	udelay(2);
 	if (udc_readl(udc, UDCCR) & UDCCR_EMCE)
 		dev_err(udc->dev, "Configuration errors, udc disabled\n");
@@ -1893,6 +1910,15 @@ static void handle_ep0_ctrl_req(struct pxa_udc *udc,
 
 	nuke(ep, -EPROTO);
 
+	/*
+	 * In the PXA320 manual, in the section about Back-to-Back setup
+	 * packets, it describes this situation.  The solution is to set OPC to
+	 * get rid of the status packet, and then continue with the setup
+	 * packet. Generalize to pxa27x CPUs.
+	 */
+	if (epout_has_pkt(ep) && (ep_count_bytes_remain(ep) == 0))
+		ep_write_UDCCSR(ep, UDCCSR0_OPC);
+
 	/* read SETUP packet */
 	for (i = 0; i < 2; i++) {
 		if (unlikely(ep_is_empty(ep)))
@@ -1919,7 +1945,7 @@ static void handle_ep0_ctrl_req(struct pxa_udc *udc,
 		set_ep0state(udc, OUT_DATA_STAGE);
 
 	/* Tell UDC to enter Data Stage */
-	udc_ep_writel(ep, UDCCSR, UDCCSR0_SA | UDCCSR0_OPC);
+	ep_write_UDCCSR(ep, UDCCSR0_SA | UDCCSR0_OPC);
 
 	i = udc->driver->setup(&udc->gadget, &u.r);
 	if (i < 0)
@@ -1929,7 +1955,7 @@ out:
 stall:
 	ep_dbg(ep, "protocol STALL, udccsr0=%03x err %d\n",
 		udc_ep_readl(ep, UDCCSR), i);
-	udc_ep_writel(ep, UDCCSR, UDCCSR0_FST | UDCCSR0_FTF);
+	ep_write_UDCCSR(ep, UDCCSR0_FST | UDCCSR0_FTF);
 	set_ep0state(udc, STALL);
 	goto out;
 }
@@ -1966,6 +1992,8 @@ stall:
  *     cleared by software.
  *   - clearing UDCCSR0_OPC always flushes ep0. If in setup stage, never do it
  *     before reading ep0.
+ *     This is true only for PXA27x. This is not true anymore for PXA3xx family
+ *     (check Back-to-Back setup packet in developers guide).
  *   - irq can be called on a "packet complete" event (opc_irq=1), while
  *     UDCCSR0_OPC is not yet raised (delta can be as big as 100ms
  *     from experimentation).
@@ -1998,7 +2026,7 @@ static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq)
 	if (udccsr0 & UDCCSR0_SST) {
 		ep_dbg(ep, "clearing stall status\n");
 		nuke(ep, -EPIPE);
-		udc_ep_writel(ep, UDCCSR, UDCCSR0_SST);
+		ep_write_UDCCSR(ep, UDCCSR0_SST);
 		ep0_idle(udc);
 	}
 
@@ -2023,7 +2051,7 @@ static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq)
 		break;
 	case IN_DATA_STAGE:			/* GET_DESCRIPTOR */
 		if (epout_has_pkt(ep))
-			udc_ep_writel(ep, UDCCSR, UDCCSR0_OPC);
+			ep_write_UDCCSR(ep, UDCCSR0_OPC);
 		if (req && !ep_is_full(ep))
 			completed = write_ep0_fifo(ep, req);
 		if (completed)
@@ -2036,7 +2064,7 @@ static void handle_ep0(struct pxa_udc *udc, int fifo_irq, int opc_irq)
 			ep0_end_out_req(ep, req);
 		break;
 	case STALL:
-		udc_ep_writel(ep, UDCCSR, UDCCSR0_FST);
+		ep_write_UDCCSR(ep, UDCCSR0_FST);
 		break;
 	case IN_STATUS_STAGE:
 		/*
@@ -2131,6 +2159,7 @@ static void pxa27x_change_configuration(struct pxa_udc *udc, int config)
 
 	set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF);
 	udc->driver->setup(&udc->gadget, &req);
+	ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN);
 }
 
 /**
@@ -2159,6 +2188,7 @@ static void pxa27x_change_interface(struct pxa_udc *udc, int iface, int alt)
 
 	set_ep0state(udc, WAIT_ACK_SET_CONF_INTERF);
 	udc->driver->setup(&udc->gadget, &req);
+	ep_write_UDCCSR(&udc->pxa_ep[0], UDCCSR0_AREN);
 }
 
 /*
@@ -2280,7 +2310,7 @@ static void irq_udc_reset(struct pxa_udc *udc)
 	memset(&udc->stats, 0, sizeof udc->stats);
 
 	nuke(ep, -EPROTO);
-	udc_ep_writel(ep, UDCCSR, UDCCSR0_FTF | UDCCSR0_OPC);
+	ep_write_UDCCSR(ep, UDCCSR0_FTF | UDCCSR0_OPC);
 	ep0_idle(udc);
 }
 
@@ -2479,6 +2509,12 @@ static void pxa_udc_shutdown(struct platform_device *_dev)
 		udc_disable(udc);
 }
 
+#ifdef CONFIG_CPU_PXA27x
+extern void pxa27x_clear_otgph(void);
+#else
+#define pxa27x_clear_otgph()   do {} while (0)
+#endif
+
 #ifdef CONFIG_PM
 /**
  * pxa_udc_suspend - Suspend udc device
@@ -2546,8 +2582,7 @@ static int pxa_udc_resume(struct platform_device *_dev)
 	 * Software must configure the USB OTG pad, UDC, and UHC
 	 * to the state they were in before entering sleep mode.
 	 */
-	if (cpu_is_pxa27x())
-		PSSR |= PSSR_OTGPH;
+	pxa27x_clear_otgph();
 
 	return 0;
 }
@@ -2571,7 +2606,7 @@ static struct platform_driver udc_driver = {
 
 static int __init udc_init(void)
 {
-	if (!cpu_is_pxa27x())
+	if (!cpu_is_pxa27x() && !cpu_is_pxa3xx())
 		return -ENODEV;
 
 	printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
diff --git a/drivers/usb/gadget/pxa27x_udc.h b/drivers/usb/gadget/pxa27x_udc.h
index db58125331da..e25225e26586 100644
--- a/drivers/usb/gadget/pxa27x_udc.h
+++ b/drivers/usb/gadget/pxa27x_udc.h
@@ -130,6 +130,8 @@
 #define UP2OCR_HXOE	(1 << 17)	/* Transceiver Output Enable */
 #define UP2OCR_SEOS	(1 << 24)	/* Single-Ended Output Select */
 
+#define UDCCSR0_ACM	(1 << 9)	/* Ack Control Mode */
+#define UDCCSR0_AREN	(1 << 8)	/* Ack Response Enable */
 #define UDCCSR0_SA	(1 << 7)	/* Setup Active */
 #define UDCCSR0_RNE	(1 << 6)	/* Receive FIFO Not Empty */
 #define UDCCSR0_FST	(1 << 5)	/* Force Stall */
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 845479f7c707..1576a0520adf 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -17,6 +17,26 @@ config USB_C67X00_HCD
 	  To compile this driver as a module, choose M here: the
 	  module will be called c67x00.
 
+config USB_XHCI_HCD
+	tristate "xHCI HCD (USB 3.0) support (EXPERIMENTAL)"
+	depends on USB && PCI && EXPERIMENTAL
+	---help---
+	  The eXtensible Host Controller Interface (xHCI) is standard for USB 3.0
+	  "SuperSpeed" host controller hardware.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called xhci-hcd.
+
+config USB_XHCI_HCD_DEBUGGING
+	bool "Debugging for the xHCI host controller"
+	depends on USB_XHCI_HCD
+	---help---
+	  Say 'Y' to turn on debugging for the xHCI host controller driver.
+	  This will spew debugging output, even in interrupt context.
+	  This should only be used for debugging xHCI driver bugs.
+
+	  If unsure, say N.
+
 config USB_EHCI_HCD
 	tristate "EHCI HCD (USB 2.0) support"
 	depends on USB && USB_ARCH_HAS_EHCI
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index f163571e33d8..289d748bb414 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -12,6 +12,7 @@ fhci-objs := fhci-hcd.o fhci-hub.o fhci-q.o fhci-mem.o \
 ifeq ($(CONFIG_FHCI_DEBUG),y)
 fhci-objs += fhci-dbg.o
 endif
+xhci-objs := xhci-hcd.o xhci-mem.o xhci-pci.o xhci-ring.o xhci-hub.o xhci-dbg.o
 
 obj-$(CONFIG_USB_WHCI_HCD)	+= whci/
 
@@ -23,6 +24,7 @@ obj-$(CONFIG_USB_ISP116X_HCD)	+= isp116x-hcd.o
 obj-$(CONFIG_USB_OHCI_HCD)	+= ohci-hcd.o
 obj-$(CONFIG_USB_UHCI_HCD)	+= uhci-hcd.o
 obj-$(CONFIG_USB_FHCI_HCD)	+= fhci.o
+obj-$(CONFIG_USB_XHCI_HCD)	+= xhci.o
 obj-$(CONFIG_USB_SL811_HCD)	+= sl811-hcd.o
 obj-$(CONFIG_USB_SL811_CS)	+= sl811_cs.o
 obj-$(CONFIG_USB_U132_HCD)	+= u132-hcd.o
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index c637207a1c80..a2ca9cbf2809 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -1097,7 +1097,7 @@ static int __init ehci_hcd_init(void)
 		 sizeof(struct ehci_itd), sizeof(struct ehci_sitd));
 
 #ifdef DEBUG
-	ehci_debug_root = debugfs_create_dir("ehci", NULL);
+	ehci_debug_root = debugfs_create_dir("ehci", usb_debug_root);
 	if (!ehci_debug_root) {
 		retval = -ENOENT;
 		goto err_debug;
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index 97a53a48a3d8..f46ad27c9a90 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -391,7 +391,7 @@ static inline void create_companion_file(struct ehci_hcd *ehci)
 
 	/* with integrated TT there is no companion! */
 	if (!ehci_is_TDI(ehci))
-		i = device_create_file(ehci_to_hcd(ehci)->self.dev,
+		i = device_create_file(ehci_to_hcd(ehci)->self.controller,
 				       &dev_attr_companion);
 }
 
@@ -399,7 +399,7 @@ static inline void remove_companion_file(struct ehci_hcd *ehci)
 {
 	/* with integrated TT there is no companion! */
 	if (!ehci_is_TDI(ehci))
-		device_remove_file(ehci_to_hcd(ehci)->self.dev,
+		device_remove_file(ehci_to_hcd(ehci)->self.controller,
 				   &dev_attr_companion);
 }
 
diff --git a/drivers/usb/host/ehci-orion.c b/drivers/usb/host/ehci-orion.c
index 9d487908012e..17dc15407a07 100644
--- a/drivers/usb/host/ehci-orion.c
+++ b/drivers/usb/host/ehci-orion.c
@@ -187,7 +187,7 @@ ehci_orion_conf_mbus_windows(struct usb_hcd *hcd,
 	}
 }
 
-static int __init ehci_orion_drv_probe(struct platform_device *pdev)
+static int __devinit ehci_orion_drv_probe(struct platform_device *pdev)
 {
 	struct orion_ehci_data *pd = pdev->dev.platform_data;
 	struct resource *res;
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c
index 5aa8bce90e1f..e74948898f76 100644
--- a/drivers/usb/host/ehci-pci.c
+++ b/drivers/usb/host/ehci-pci.c
@@ -268,7 +268,7 @@ done:
  * Also they depend on separate root hub suspend/resume.
  */
 
-static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
+static int ehci_pci_suspend(struct usb_hcd *hcd)
 {
 	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
 	unsigned long		flags;
@@ -293,12 +293,6 @@ static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
 	ehci_writel(ehci, 0, &ehci->regs->intr_enable);
 	(void)ehci_readl(ehci, &ehci->regs->intr_enable);
 
-	/* make sure snapshot being resumed re-enumerates everything */
-	if (message.event == PM_EVENT_PRETHAW) {
-		ehci_halt(ehci);
-		ehci_reset(ehci);
-	}
-
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
  bail:
 	spin_unlock_irqrestore (&ehci->lock, flags);
@@ -309,7 +303,7 @@ static int ehci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
 	return rc;
 }
 
-static int ehci_pci_resume(struct usb_hcd *hcd)
+static int ehci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 {
 	struct ehci_hcd		*ehci = hcd_to_ehci(hcd);
 	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
@@ -322,10 +316,12 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
 	/* Mark hardware accessible again as we are out of D3 state by now */
 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 
-	/* If CF is still set, we maintained PCI Vaux power.
+	/* If CF is still set and we aren't resuming from hibernation
+	 * then we maintained PCI Vaux power.
 	 * Just undo the effect of ehci_pci_suspend().
 	 */
-	if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF) {
+	if (ehci_readl(ehci, &ehci->regs->configured_flag) == FLAG_CF &&
+				!hibernated) {
 		int	mask = INTR_MASK;
 
 		if (!hcd->self.root_hub->do_remote_wakeup)
@@ -335,7 +331,6 @@ static int ehci_pci_resume(struct usb_hcd *hcd)
 		return 0;
 	}
 
-	ehci_dbg(ehci, "lost power, restarting\n");
 	usb_root_hub_lost_power(hcd->self.root_hub);
 
 	/* Else reset, to cope with power loss or flush-to-storage
@@ -429,10 +424,11 @@ static struct pci_driver ehci_pci_driver = {
 
 	.probe =	usb_hcd_pci_probe,
 	.remove =	usb_hcd_pci_remove,
+	.shutdown = 	usb_hcd_pci_shutdown,
 
-#ifdef	CONFIG_PM
-	.suspend =	usb_hcd_pci_suspend,
-	.resume =	usb_hcd_pci_resume,
+#ifdef CONFIG_PM_SLEEP
+	.driver =	{
+		.pm =	&usb_hcd_pci_pm_ops
+	},
 #endif
-	.shutdown = 	usb_hcd_pci_shutdown,
 };
diff --git a/drivers/usb/host/fhci-dbg.c b/drivers/usb/host/fhci-dbg.c
index ea8a4255c5da..e799f86dab11 100644
--- a/drivers/usb/host/fhci-dbg.c
+++ b/drivers/usb/host/fhci-dbg.c
@@ -108,7 +108,7 @@ void fhci_dfs_create(struct fhci_hcd *fhci)
 {
 	struct device *dev = fhci_to_hcd(fhci)->self.controller;
 
-	fhci->dfs_root = debugfs_create_dir(dev_name(dev), NULL);
+	fhci->dfs_root = debugfs_create_dir(dev_name(dev), usb_debug_root);
 	if (!fhci->dfs_root) {
 		WARN_ON(1);
 		return;
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
index cbf30e515f29..88b03214622b 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -172,25 +172,6 @@ error_cluster_id_get:
 
 }
 
-static int hwahc_op_suspend(struct usb_hcd *usb_hcd, pm_message_t msg)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-	dev_err(wusbhc->dev, "%s (%p [%p], 0x%lx) UNIMPLEMENTED\n", __func__,
-		usb_hcd, hwahc, *(unsigned long *) &msg);
-	return -ENOSYS;
-}
-
-static int hwahc_op_resume(struct usb_hcd *usb_hcd)
-{
-	struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
-	struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
-
-	dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
-		usb_hcd, hwahc);
-	return -ENOSYS;
-}
-
 /*
  * No need to abort pipes, as when this is called, all the children
  * has been disconnected and that has done it [through
@@ -598,8 +579,6 @@ static struct hc_driver hwahc_hc_driver = {
 	.flags = HCD_USB2,		/* FIXME */
 	.reset = hwahc_op_reset,
 	.start = hwahc_op_start,
-	.pci_suspend = hwahc_op_suspend,
-	.pci_resume = hwahc_op_resume,
 	.stop = hwahc_op_stop,
 	.get_frame_number = hwahc_op_get_frame_number,
 	.urb_enqueue = hwahc_op_urb_enqueue,
diff --git a/drivers/usb/host/ohci-dbg.c b/drivers/usb/host/ohci-dbg.c
index d3269656aa4d..811f5dfdc582 100644
--- a/drivers/usb/host/ohci-dbg.c
+++ b/drivers/usb/host/ohci-dbg.c
@@ -431,7 +431,7 @@ static struct dentry *ohci_debug_root;
 
 struct debug_buffer {
 	ssize_t (*fill_func)(struct debug_buffer *);	/* fill method */
-	struct device *dev;
+	struct ohci_hcd *ohci;
 	struct mutex mutex;	/* protect filling of buffer */
 	size_t count;		/* number of characters filled into buffer */
 	char *page;
@@ -505,15 +505,11 @@ show_list (struct ohci_hcd *ohci, char *buf, size_t count, struct ed *ed)
 
 static ssize_t fill_async_buffer(struct debug_buffer *buf)
 {
-	struct usb_bus		*bus;
-	struct usb_hcd		*hcd;
 	struct ohci_hcd		*ohci;
 	size_t			temp;
 	unsigned long		flags;
 
-	bus = dev_get_drvdata(buf->dev);
-	hcd = bus_to_hcd(bus);
-	ohci = hcd_to_ohci(hcd);
+	ohci = buf->ohci;
 
 	/* display control and bulk lists together, for simplicity */
 	spin_lock_irqsave (&ohci->lock, flags);
@@ -529,8 +525,6 @@ static ssize_t fill_async_buffer(struct debug_buffer *buf)
 
 static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 {
-	struct usb_bus		*bus;
-	struct usb_hcd		*hcd;
 	struct ohci_hcd		*ohci;
 	struct ed		**seen, *ed;
 	unsigned long		flags;
@@ -542,9 +536,7 @@ static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 		return 0;
 	seen_count = 0;
 
-	bus = (struct usb_bus *)dev_get_drvdata(buf->dev);
-	hcd = bus_to_hcd(bus);
-	ohci = hcd_to_ohci(hcd);
+	ohci = buf->ohci;
 	next = buf->page;
 	size = PAGE_SIZE;
 
@@ -626,7 +618,6 @@ static ssize_t fill_periodic_buffer(struct debug_buffer *buf)
 
 static ssize_t fill_registers_buffer(struct debug_buffer *buf)
 {
-	struct usb_bus		*bus;
 	struct usb_hcd		*hcd;
 	struct ohci_hcd		*ohci;
 	struct ohci_regs __iomem *regs;
@@ -635,9 +626,8 @@ static ssize_t fill_registers_buffer(struct debug_buffer *buf)
 	char			*next;
 	u32			rdata;
 
-	bus = (struct usb_bus *)dev_get_drvdata(buf->dev);
-	hcd = bus_to_hcd(bus);
-	ohci = hcd_to_ohci(hcd);
+	ohci = buf->ohci;
+	hcd = ohci_to_hcd(ohci);
 	regs = ohci->regs;
 	next = buf->page;
 	size = PAGE_SIZE;
@@ -710,7 +700,7 @@ done:
 	return PAGE_SIZE - size;
 }
 
-static struct debug_buffer *alloc_buffer(struct device *dev,
+static struct debug_buffer *alloc_buffer(struct ohci_hcd *ohci,
 				ssize_t (*fill_func)(struct debug_buffer *))
 {
 	struct debug_buffer *buf;
@@ -718,7 +708,7 @@ static struct debug_buffer *alloc_buffer(struct device *dev,
 	buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL);
 
 	if (buf) {
-		buf->dev = dev;
+		buf->ohci = ohci;
 		buf->fill_func = fill_func;
 		mutex_init(&buf->mutex);
 	}
@@ -810,26 +800,25 @@ static int debug_registers_open(struct inode *inode, struct file *file)
 static inline void create_debug_files (struct ohci_hcd *ohci)
 {
 	struct usb_bus *bus = &ohci_to_hcd(ohci)->self;
-	struct device *dev = bus->dev;
 
 	ohci->debug_dir = debugfs_create_dir(bus->bus_name, ohci_debug_root);
 	if (!ohci->debug_dir)
 		goto dir_error;
 
 	ohci->debug_async = debugfs_create_file("async", S_IRUGO,
-						ohci->debug_dir, dev,
+						ohci->debug_dir, ohci,
 						&debug_async_fops);
 	if (!ohci->debug_async)
 		goto async_error;
 
 	ohci->debug_periodic = debugfs_create_file("periodic", S_IRUGO,
-						   ohci->debug_dir, dev,
+						   ohci->debug_dir, ohci,
 						   &debug_periodic_fops);
 	if (!ohci->debug_periodic)
 		goto periodic_error;
 
 	ohci->debug_registers = debugfs_create_file("registers", S_IRUGO,
-						    ohci->debug_dir, dev,
+						    ohci->debug_dir, ohci,
 						    &debug_registers_fops);
 	if (!ohci->debug_registers)
 		goto registers_error;
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index 25db704f3a2a..58151687d351 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -571,7 +571,7 @@ static int ohci_init (struct ohci_hcd *ohci)
  */
 static int ohci_run (struct ohci_hcd *ohci)
 {
-	u32			mask, temp;
+	u32			mask, val;
 	int			first = ohci->fminterval == 0;
 	struct usb_hcd		*hcd = ohci_to_hcd(ohci);
 
@@ -580,8 +580,8 @@ static int ohci_run (struct ohci_hcd *ohci)
 	/* boot firmware should have set this up (5.1.1.3.1) */
 	if (first) {
 
-		temp = ohci_readl (ohci, &ohci->regs->fminterval);
-		ohci->fminterval = temp & 0x3fff;
+		val = ohci_readl (ohci, &ohci->regs->fminterval);
+		ohci->fminterval = val & 0x3fff;
 		if (ohci->fminterval != FI)
 			ohci_dbg (ohci, "fminterval delta %d\n",
 				ohci->fminterval - FI);
@@ -600,25 +600,25 @@ static int ohci_run (struct ohci_hcd *ohci)
 
 	switch (ohci->hc_control & OHCI_CTRL_HCFS) {
 	case OHCI_USB_OPER:
-		temp = 0;
+		val = 0;
 		break;
 	case OHCI_USB_SUSPEND:
 	case OHCI_USB_RESUME:
 		ohci->hc_control &= OHCI_CTRL_RWC;
 		ohci->hc_control |= OHCI_USB_RESUME;
-		temp = 10 /* msec wait */;
+		val = 10 /* msec wait */;
 		break;
 	// case OHCI_USB_RESET:
 	default:
 		ohci->hc_control &= OHCI_CTRL_RWC;
 		ohci->hc_control |= OHCI_USB_RESET;
-		temp = 50 /* msec wait */;
+		val = 50 /* msec wait */;
 		break;
 	}
 	ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
 	// flush the writes
 	(void) ohci_readl (ohci, &ohci->regs->control);
-	msleep(temp);
+	msleep(val);
 
 	memset (ohci->hcca, 0, sizeof (struct ohci_hcca));
 
@@ -628,9 +628,9 @@ static int ohci_run (struct ohci_hcd *ohci)
 retry:
 	/* HC Reset requires max 10 us delay */
 	ohci_writel (ohci, OHCI_HCR,  &ohci->regs->cmdstatus);
-	temp = 30;	/* ... allow extra time */
+	val = 30;	/* ... allow extra time */
 	while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
-		if (--temp == 0) {
+		if (--val == 0) {
 			spin_unlock_irq (&ohci->lock);
 			ohci_err (ohci, "USB HC reset timed out!\n");
 			return -1;
@@ -699,23 +699,23 @@ retry:
 	ohci_writel (ohci, mask, &ohci->regs->intrenable);
 
 	/* handle root hub init quirks ... */
-	temp = roothub_a (ohci);
-	temp &= ~(RH_A_PSM | RH_A_OCPM);
+	val = roothub_a (ohci);
+	val &= ~(RH_A_PSM | RH_A_OCPM);
 	if (ohci->flags & OHCI_QUIRK_SUPERIO) {
 		/* NSC 87560 and maybe others */
-		temp |= RH_A_NOCP;
-		temp &= ~(RH_A_POTPGT | RH_A_NPS);
-		ohci_writel (ohci, temp, &ohci->regs->roothub.a);
+		val |= RH_A_NOCP;
+		val &= ~(RH_A_POTPGT | RH_A_NPS);
+		ohci_writel (ohci, val, &ohci->regs->roothub.a);
 	} else if ((ohci->flags & OHCI_QUIRK_AMD756) ||
 			(ohci->flags & OHCI_QUIRK_HUB_POWER)) {
 		/* hub power always on; required for AMD-756 and some
 		 * Mac platforms.  ganged overcurrent reporting, if any.
 		 */
-		temp |= RH_A_NPS;
-		ohci_writel (ohci, temp, &ohci->regs->roothub.a);
+		val |= RH_A_NPS;
+		ohci_writel (ohci, val, &ohci->regs->roothub.a);
 	}
 	ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status);
-	ohci_writel (ohci, (temp & RH_A_NPS) ? 0 : RH_B_PPCM,
+	ohci_writel (ohci, (val & RH_A_NPS) ? 0 : RH_B_PPCM,
 						&ohci->regs->roothub.b);
 	// flush those writes
 	(void) ohci_readl (ohci, &ohci->regs->control);
@@ -724,7 +724,7 @@ retry:
 	spin_unlock_irq (&ohci->lock);
 
 	// POTPGT delay is bits 24-31, in 2 ms units.
-	mdelay ((temp >> 23) & 0x1fe);
+	mdelay ((val >> 23) & 0x1fe);
 	hcd->state = HC_STATE_RUNNING;
 
 	if (quirk_zfmicro(ohci)) {
@@ -1105,7 +1105,7 @@ static int __init ohci_hcd_mod_init(void)
 	set_bit(USB_OHCI_LOADED, &usb_hcds_loaded);
 
 #ifdef DEBUG
-	ohci_debug_root = debugfs_create_dir("ohci", NULL);
+	ohci_debug_root = debugfs_create_dir("ohci", usb_debug_root);
 	if (!ohci_debug_root) {
 		retval = -ENOENT;
 		goto error_debug;
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index f9961b4c0da3..d2ba04dd785e 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -372,7 +372,7 @@ static int __devinit ohci_pci_start (struct usb_hcd *hcd)
 
 #ifdef	CONFIG_PM
 
-static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
+static int ohci_pci_suspend(struct usb_hcd *hcd)
 {
 	struct ohci_hcd	*ohci = hcd_to_ohci (hcd);
 	unsigned long	flags;
@@ -394,10 +394,6 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 	ohci_writel(ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable);
 	(void)ohci_readl(ohci, &ohci->regs->intrdisable);
 
-	/* make sure snapshot being resumed re-enumerates everything */
-	if (message.event == PM_EVENT_PRETHAW)
-		ohci_usb_reset(ohci);
-
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
  bail:
 	spin_unlock_irqrestore (&ohci->lock, flags);
@@ -406,9 +402,14 @@ static int ohci_pci_suspend (struct usb_hcd *hcd, pm_message_t message)
 }
 
 
-static int ohci_pci_resume (struct usb_hcd *hcd)
+static int ohci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 {
 	set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+	/* Make sure resume from hibernation re-enumerates everything */
+	if (hibernated)
+		ohci_usb_reset(hcd_to_ohci(hcd));
+
 	ohci_finish_controller_resume(hcd);
 	return 0;
 }
@@ -484,12 +485,11 @@ static struct pci_driver ohci_pci_driver = {
 
 	.probe =	usb_hcd_pci_probe,
 	.remove =	usb_hcd_pci_remove,
+	.shutdown =	usb_hcd_pci_shutdown,
 
-#ifdef	CONFIG_PM
-	.suspend =	usb_hcd_pci_suspend,
-	.resume =	usb_hcd_pci_resume,
+#ifdef CONFIG_PM_SLEEP
+	.driver =	{
+		.pm =	&usb_hcd_pci_pm_ops
+	},
 #endif
-
-	.shutdown =	usb_hcd_pci_shutdown,
 };
-
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index 033c2846ce59..83b5f9cea85a 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/acpi.h>
 #include "pci-quirks.h"
+#include "xhci-ext-caps.h"
 
 
 #define UHCI_USBLEGSUP		0xc0		/* legacy support */
@@ -341,7 +342,127 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
 	return;
 }
 
+/*
+ * handshake - spin reading a register until handshake completes
+ * @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
+ * @wait_usec: timeout in microseconds
+ * @delay_usec: delay in microseconds to wait between polling
+ *
+ * Polls a register every delay_usec microseconds.
+ * Returns 0 when the mask bits have the value done.
+ * Returns -ETIMEDOUT if this condition is not true after
+ * wait_usec microseconds have passed.
+ */
+static int handshake(void __iomem *ptr, u32 mask, u32 done,
+		int wait_usec, int delay_usec)
+{
+	u32	result;
+
+	do {
+		result = readl(ptr);
+		result &= mask;
+		if (result == done)
+			return 0;
+		udelay(delay_usec);
+		wait_usec -= delay_usec;
+	} while (wait_usec > 0);
+	return -ETIMEDOUT;
+}
+
+/**
+ * PCI Quirks for xHCI.
+ *
+ * Takes care of the handoff between the Pre-OS (i.e. BIOS) and the OS.
+ * It signals to the BIOS that the OS wants control of the host controller,
+ * and then waits 5 seconds for the BIOS to hand over control.
+ * If we timeout, assume the BIOS is broken and take control anyway.
+ */
+static void __devinit quirk_usb_handoff_xhci(struct pci_dev *pdev)
+{
+	void __iomem *base;
+	int ext_cap_offset;
+	void __iomem *op_reg_base;
+	u32 val;
+	int timeout;
+
+	if (!mmio_resource_enabled(pdev, 0))
+		return;
+
+	base = ioremap_nocache(pci_resource_start(pdev, 0),
+				pci_resource_len(pdev, 0));
+	if (base == NULL)
+		return;
 
+	/*
+	 * Find the Legacy Support Capability register -
+	 * this is optional for xHCI host controllers.
+	 */
+	ext_cap_offset = xhci_find_next_cap_offset(base, XHCI_HCC_PARAMS_OFFSET);
+	do {
+		if (!ext_cap_offset)
+			/* We've reached the end of the extended capabilities */
+			goto hc_init;
+		val = readl(base + ext_cap_offset);
+		if (XHCI_EXT_CAPS_ID(val) == XHCI_EXT_CAPS_LEGACY)
+			break;
+		ext_cap_offset = xhci_find_next_cap_offset(base, ext_cap_offset);
+	} while (1);
+
+	/* If the BIOS owns the HC, signal that the OS wants it, and wait */
+	if (val & XHCI_HC_BIOS_OWNED) {
+		writel(val & XHCI_HC_OS_OWNED, base + ext_cap_offset);
+
+		/* Wait for 5 seconds with 10 microsecond polling interval */
+		timeout = handshake(base + ext_cap_offset, XHCI_HC_BIOS_OWNED,
+				0, 5000, 10);
+
+		/* Assume a buggy BIOS and take HC ownership anyway */
+		if (timeout) {
+			dev_warn(&pdev->dev, "xHCI BIOS handoff failed"
+					" (BIOS bug ?) %08x\n", val);
+			writel(val & ~XHCI_HC_BIOS_OWNED, base + ext_cap_offset);
+		}
+	}
+
+	/* Disable any BIOS SMIs */
+	writel(XHCI_LEGACY_DISABLE_SMI,
+			base + ext_cap_offset + XHCI_LEGACY_CONTROL_OFFSET);
+
+hc_init:
+	op_reg_base = base + XHCI_HC_LENGTH(readl(base));
+
+	/* Wait for the host controller to be ready before writing any
+	 * operational or runtime registers.  Wait 5 seconds and no more.
+	 */
+	timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_CNR, 0,
+			5000, 10);
+	/* Assume a buggy HC and start HC initialization anyway */
+	if (timeout) {
+		val = readl(op_reg_base + XHCI_STS_OFFSET);
+		dev_warn(&pdev->dev,
+				"xHCI HW not ready after 5 sec (HC bug?) "
+				"status = 0x%x\n", val);
+	}
+
+	/* Send the halt and disable interrupts command */
+	val = readl(op_reg_base + XHCI_CMD_OFFSET);
+	val &= ~(XHCI_CMD_RUN | XHCI_IRQS);
+	writel(val, op_reg_base + XHCI_CMD_OFFSET);
+
+	/* Wait for the HC to halt - poll every 125 usec (one microframe). */
+	timeout = handshake(op_reg_base + XHCI_STS_OFFSET, XHCI_STS_HALT, 1,
+			XHCI_MAX_HALT_USEC, 125);
+	if (timeout) {
+		val = readl(op_reg_base + XHCI_STS_OFFSET);
+		dev_warn(&pdev->dev,
+				"xHCI HW did not halt within %d usec "
+				"status = 0x%x\n", XHCI_MAX_HALT_USEC, val);
+	}
+
+	iounmap(base);
+}
 
 static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
 {
@@ -351,5 +472,7 @@ static void __devinit quirk_usb_early_handoff(struct pci_dev *pdev)
 		quirk_usb_handoff_ohci(pdev);
 	else if (pdev->class == PCI_CLASS_SERIAL_USB_EHCI)
 		quirk_usb_disable_ehci(pdev);
+	else if (pdev->class == PCI_CLASS_SERIAL_USB_XHCI)
+		quirk_usb_handoff_xhci(pdev);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, quirk_usb_early_handoff);
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index f1626e58c141..3e1216ad86bd 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -2373,7 +2373,7 @@ static int __init_or_module r8a66597_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static int __init r8a66597_probe(struct platform_device *pdev)
+static int __devinit r8a66597_probe(struct platform_device *pdev)
 {
 #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) && defined(CONFIG_HAVE_CLK)
 	char clk_name[8];
diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index cf5e4cf7ea42..274751b4409c 100644
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -769,7 +769,7 @@ static int uhci_rh_resume(struct usb_hcd *hcd)
 	return rc;
 }
 
-static int uhci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
+static int uhci_pci_suspend(struct usb_hcd *hcd)
 {
 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 	int rc = 0;
@@ -795,10 +795,6 @@ static int uhci_pci_suspend(struct usb_hcd *hcd, pm_message_t message)
 
 	/* FIXME: Enable non-PME# remote wakeup? */
 
-	/* make sure snapshot being resumed re-enumerates everything */
-	if (message.event == PM_EVENT_PRETHAW)
-		uhci_hc_died(uhci);
-
 done_okay:
 	clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
 done:
@@ -806,7 +802,7 @@ done:
 	return rc;
 }
 
-static int uhci_pci_resume(struct usb_hcd *hcd)
+static int uhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 {
 	struct uhci_hcd *uhci = hcd_to_uhci(hcd);
 
@@ -820,6 +816,10 @@ static int uhci_pci_resume(struct usb_hcd *hcd)
 
 	spin_lock_irq(&uhci->lock);
 
+	/* Make sure resume from hibernation re-enumerates everything */
+	if (hibernated)
+		uhci_hc_died(uhci);
+
 	/* FIXME: Disable non-PME# remote wakeup? */
 
 	/* The firmware or a boot kernel may have changed the controller
@@ -940,10 +940,11 @@ static struct pci_driver uhci_pci_driver = {
 	.remove =	usb_hcd_pci_remove,
 	.shutdown =	uhci_shutdown,
 
-#ifdef	CONFIG_PM
-	.suspend =	usb_hcd_pci_suspend,
-	.resume =	usb_hcd_pci_resume,
-#endif	/* PM */
+#ifdef CONFIG_PM_SLEEP
+	.driver =	{
+		.pm =	&usb_hcd_pci_pm_ops
+	},
+#endif
 };
  
 static int __init uhci_hcd_init(void)
@@ -961,7 +962,7 @@ static int __init uhci_hcd_init(void)
 		errbuf = kmalloc(ERRBUF_LEN, GFP_KERNEL);
 		if (!errbuf)
 			goto errbuf_failed;
-		uhci_debugfs_root = debugfs_create_dir("uhci", NULL);
+		uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root);
 		if (!uhci_debugfs_root)
 			goto debug_failed;
 	}
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 3e5807d14ffb..64e57bfe236b 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -260,7 +260,7 @@ static struct uhci_qh *uhci_alloc_qh(struct uhci_hcd *uhci,
 	INIT_LIST_HEAD(&qh->node);
 
 	if (udev) {		/* Normal QH */
-		qh->type = hep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
+		qh->type = usb_endpoint_type(&hep->desc);
 		if (qh->type != USB_ENDPOINT_XFER_ISOC) {
 			qh->dummy_td = uhci_alloc_td(uhci);
 			if (!qh->dummy_td) {
diff --git a/drivers/usb/host/xhci-dbg.c b/drivers/usb/host/xhci-dbg.c
new file mode 100644
index 000000000000..6473cbf329f9
--- /dev/null
+++ b/drivers/usb/host/xhci-dbg.c
@@ -0,0 +1,485 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "xhci.h"
+
+#define XHCI_INIT_VALUE 0x0
+
+/* Add verbose debugging later, just print everything for now */
+
+void xhci_dbg_regs(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	xhci_dbg(xhci, "// xHCI capability registers at %p:\n",
+			xhci->cap_regs);
+	temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
+	xhci_dbg(xhci, "// @%p = 0x%x (CAPLENGTH AND HCIVERSION)\n",
+			&xhci->cap_regs->hc_capbase, temp);
+	xhci_dbg(xhci, "//   CAPLENGTH: 0x%x\n",
+			(unsigned int) HC_LENGTH(temp));
+#if 0
+	xhci_dbg(xhci, "//   HCIVERSION: 0x%x\n",
+			(unsigned int) HC_VERSION(temp));
+#endif
+
+	xhci_dbg(xhci, "// xHCI operational registers at %p:\n", xhci->op_regs);
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
+	xhci_dbg(xhci, "// @%p = 0x%x RTSOFF\n",
+			&xhci->cap_regs->run_regs_off,
+			(unsigned int) temp & RTSOFF_MASK);
+	xhci_dbg(xhci, "// xHCI runtime registers at %p:\n", xhci->run_regs);
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->db_off);
+	xhci_dbg(xhci, "// @%p = 0x%x DBOFF\n", &xhci->cap_regs->db_off, temp);
+	xhci_dbg(xhci, "// Doorbell array at %p:\n", xhci->dba);
+}
+
+static void xhci_print_cap_regs(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	xhci_dbg(xhci, "xHCI capability registers at %p:\n", xhci->cap_regs);
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->hc_capbase);
+	xhci_dbg(xhci, "CAPLENGTH AND HCIVERSION 0x%x:\n",
+			(unsigned int) temp);
+	xhci_dbg(xhci, "CAPLENGTH: 0x%x\n",
+			(unsigned int) HC_LENGTH(temp));
+	xhci_dbg(xhci, "HCIVERSION: 0x%x\n",
+			(unsigned int) HC_VERSION(temp));
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
+	xhci_dbg(xhci, "HCSPARAMS 1: 0x%x\n",
+			(unsigned int) temp);
+	xhci_dbg(xhci, "  Max device slots: %u\n",
+			(unsigned int) HCS_MAX_SLOTS(temp));
+	xhci_dbg(xhci, "  Max interrupters: %u\n",
+			(unsigned int) HCS_MAX_INTRS(temp));
+	xhci_dbg(xhci, "  Max ports: %u\n",
+			(unsigned int) HCS_MAX_PORTS(temp));
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
+	xhci_dbg(xhci, "HCSPARAMS 2: 0x%x\n",
+			(unsigned int) temp);
+	xhci_dbg(xhci, "  Isoc scheduling threshold: %u\n",
+			(unsigned int) HCS_IST(temp));
+	xhci_dbg(xhci, "  Maximum allowed segments in event ring: %u\n",
+			(unsigned int) HCS_ERST_MAX(temp));
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+	xhci_dbg(xhci, "HCSPARAMS 3 0x%x:\n",
+			(unsigned int) temp);
+	xhci_dbg(xhci, "  Worst case U1 device exit latency: %u\n",
+			(unsigned int) HCS_U1_LATENCY(temp));
+	xhci_dbg(xhci, "  Worst case U2 device exit latency: %u\n",
+			(unsigned int) HCS_U2_LATENCY(temp));
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+	xhci_dbg(xhci, "HCC PARAMS 0x%x:\n", (unsigned int) temp);
+	xhci_dbg(xhci, "  HC generates %s bit addresses\n",
+			HCC_64BIT_ADDR(temp) ? "64" : "32");
+	/* FIXME */
+	xhci_dbg(xhci, "  FIXME: more HCCPARAMS debugging\n");
+
+	temp = xhci_readl(xhci, &xhci->cap_regs->run_regs_off);
+	xhci_dbg(xhci, "RTSOFF 0x%x:\n", temp & RTSOFF_MASK);
+}
+
+static void xhci_print_command_reg(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	temp = xhci_readl(xhci, &xhci->op_regs->command);
+	xhci_dbg(xhci, "USBCMD 0x%x:\n", temp);
+	xhci_dbg(xhci, "  HC is %s\n",
+			(temp & CMD_RUN) ? "running" : "being stopped");
+	xhci_dbg(xhci, "  HC has %sfinished hard reset\n",
+			(temp & CMD_RESET) ? "not " : "");
+	xhci_dbg(xhci, "  Event Interrupts %s\n",
+			(temp & CMD_EIE) ? "enabled " : "disabled");
+	xhci_dbg(xhci, "  Host System Error Interrupts %s\n",
+			(temp & CMD_EIE) ? "enabled " : "disabled");
+	xhci_dbg(xhci, "  HC has %sfinished light reset\n",
+			(temp & CMD_LRESET) ? "not " : "");
+}
+
+static void xhci_print_status(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	temp = xhci_readl(xhci, &xhci->op_regs->status);
+	xhci_dbg(xhci, "USBSTS 0x%x:\n", temp);
+	xhci_dbg(xhci, "  Event ring is %sempty\n",
+			(temp & STS_EINT) ? "not " : "");
+	xhci_dbg(xhci, "  %sHost System Error\n",
+			(temp & STS_FATAL) ? "WARNING: " : "No ");
+	xhci_dbg(xhci, "  HC is %s\n",
+			(temp & STS_HALT) ? "halted" : "running");
+}
+
+static void xhci_print_op_regs(struct xhci_hcd *xhci)
+{
+	xhci_dbg(xhci, "xHCI operational registers at %p:\n", xhci->op_regs);
+	xhci_print_command_reg(xhci);
+	xhci_print_status(xhci);
+}
+
+static void xhci_print_ports(struct xhci_hcd *xhci)
+{
+	u32 __iomem *addr;
+	int i, j;
+	int ports;
+	char *names[NUM_PORT_REGS] = {
+		"status",
+		"power",
+		"link",
+		"reserved",
+	};
+
+	ports = HCS_MAX_PORTS(xhci->hcs_params1);
+	addr = &xhci->op_regs->port_status_base;
+	for (i = 0; i < ports; i++) {
+		for (j = 0; j < NUM_PORT_REGS; ++j) {
+			xhci_dbg(xhci, "%p port %s reg = 0x%x\n",
+					addr, names[j],
+					(unsigned int) xhci_readl(xhci, addr));
+			addr++;
+		}
+	}
+}
+
+void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num)
+{
+	void *addr;
+	u32 temp;
+
+	addr = &ir_set->irq_pending;
+	temp = xhci_readl(xhci, addr);
+	if (temp == XHCI_INIT_VALUE)
+		return;
+
+	xhci_dbg(xhci, "  %p: ir_set[%i]\n", ir_set, set_num);
+
+	xhci_dbg(xhci, "  %p: ir_set.pending = 0x%x\n", addr,
+			(unsigned int)temp);
+
+	addr = &ir_set->irq_control;
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.control = 0x%x\n", addr,
+			(unsigned int)temp);
+
+	addr = &ir_set->erst_size;
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.erst_size = 0x%x\n", addr,
+			(unsigned int)temp);
+
+	addr = &ir_set->rsvd;
+	temp = xhci_readl(xhci, addr);
+	if (temp != XHCI_INIT_VALUE)
+		xhci_dbg(xhci, "  WARN: %p: ir_set.rsvd = 0x%x\n",
+				addr, (unsigned int)temp);
+
+	addr = &ir_set->erst_base[0];
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.erst_base[0] = 0x%x\n",
+			addr, (unsigned int) temp);
+
+	addr = &ir_set->erst_base[1];
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.erst_base[1] = 0x%x\n",
+			addr, (unsigned int) temp);
+
+	addr = &ir_set->erst_dequeue[0];
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.erst_dequeue[0] = 0x%x\n",
+			addr, (unsigned int) temp);
+
+	addr = &ir_set->erst_dequeue[1];
+	temp = xhci_readl(xhci, addr);
+	xhci_dbg(xhci, "  %p: ir_set.erst_dequeue[1] = 0x%x\n",
+			addr, (unsigned int) temp);
+}
+
+void xhci_print_run_regs(struct xhci_hcd *xhci)
+{
+	u32 temp;
+	int i;
+
+	xhci_dbg(xhci, "xHCI runtime registers at %p:\n", xhci->run_regs);
+	temp = xhci_readl(xhci, &xhci->run_regs->microframe_index);
+	xhci_dbg(xhci, "  %p: Microframe index = 0x%x\n",
+			&xhci->run_regs->microframe_index,
+			(unsigned int) temp);
+	for (i = 0; i < 7; ++i) {
+		temp = xhci_readl(xhci, &xhci->run_regs->rsvd[i]);
+		if (temp != XHCI_INIT_VALUE)
+			xhci_dbg(xhci, "  WARN: %p: Rsvd[%i] = 0x%x\n",
+					&xhci->run_regs->rsvd[i],
+					i, (unsigned int) temp);
+	}
+}
+
+void xhci_print_registers(struct xhci_hcd *xhci)
+{
+	xhci_print_cap_regs(xhci);
+	xhci_print_op_regs(xhci);
+	xhci_print_ports(xhci);
+}
+
+void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb)
+{
+	int i;
+	for (i = 0; i < 4; ++i)
+		xhci_dbg(xhci, "Offset 0x%x = 0x%x\n",
+				i*4, trb->generic.field[i]);
+}
+
+/**
+ * Debug a transfer request block (TRB).
+ */
+void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb)
+{
+	u64	address;
+	u32	type = xhci_readl(xhci, &trb->link.control) & TRB_TYPE_BITMASK;
+
+	switch (type) {
+	case TRB_TYPE(TRB_LINK):
+		xhci_dbg(xhci, "Link TRB:\n");
+		xhci_print_trb_offsets(xhci, trb);
+
+		address = trb->link.segment_ptr[0] +
+			(((u64) trb->link.segment_ptr[1]) << 32);
+		xhci_dbg(xhci, "Next ring segment DMA address = 0x%llx\n", address);
+
+		xhci_dbg(xhci, "Interrupter target = 0x%x\n",
+				GET_INTR_TARGET(trb->link.intr_target));
+		xhci_dbg(xhci, "Cycle bit = %u\n",
+				(unsigned int) (trb->link.control & TRB_CYCLE));
+		xhci_dbg(xhci, "Toggle cycle bit = %u\n",
+				(unsigned int) (trb->link.control & LINK_TOGGLE));
+		xhci_dbg(xhci, "No Snoop bit = %u\n",
+				(unsigned int) (trb->link.control & TRB_NO_SNOOP));
+		break;
+	case TRB_TYPE(TRB_TRANSFER):
+		address = trb->trans_event.buffer[0] +
+			(((u64) trb->trans_event.buffer[1]) << 32);
+		/*
+		 * FIXME: look at flags to figure out if it's an address or if
+		 * the data is directly in the buffer field.
+		 */
+		xhci_dbg(xhci, "DMA address or buffer contents= %llu\n", address);
+		break;
+	case TRB_TYPE(TRB_COMPLETION):
+		address = trb->event_cmd.cmd_trb[0] +
+			(((u64) trb->event_cmd.cmd_trb[1]) << 32);
+		xhci_dbg(xhci, "Command TRB pointer = %llu\n", address);
+		xhci_dbg(xhci, "Completion status = %u\n",
+				(unsigned int) GET_COMP_CODE(trb->event_cmd.status));
+		xhci_dbg(xhci, "Flags = 0x%x\n", (unsigned int) trb->event_cmd.flags);
+		break;
+	default:
+		xhci_dbg(xhci, "Unknown TRB with TRB type ID %u\n",
+				(unsigned int) type>>10);
+		xhci_print_trb_offsets(xhci, trb);
+		break;
+	}
+}
+
+/**
+ * Debug a segment with an xHCI ring.
+ *
+ * @return The Link TRB of the segment, or NULL if there is no Link TRB
+ * (which is a bug, since all segments must have a Link TRB).
+ *
+ * Prints out all TRBs in the segment, even those after the Link TRB.
+ *
+ * XXX: should we print out TRBs that the HC owns?  As long as we don't
+ * write, that should be fine...  We shouldn't expect that the memory pointed to
+ * by the TRB is valid at all.  Do we care about ones the HC owns?  Probably,
+ * for HC debugging.
+ */
+void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg)
+{
+	int i;
+	u32 addr = (u32) seg->dma;
+	union xhci_trb *trb = seg->trbs;
+
+	for (i = 0; i < TRBS_PER_SEGMENT; ++i) {
+		trb = &seg->trbs[i];
+		xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n", addr,
+				(unsigned int) trb->link.segment_ptr[0],
+				(unsigned int) trb->link.segment_ptr[1],
+				(unsigned int) trb->link.intr_target,
+				(unsigned int) trb->link.control);
+		addr += sizeof(*trb);
+	}
+}
+
+void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+	xhci_dbg(xhci, "Ring deq = %p (virt), 0x%llx (dma)\n",
+			ring->dequeue,
+			(unsigned long long)xhci_trb_virt_to_dma(ring->deq_seg,
+							    ring->dequeue));
+	xhci_dbg(xhci, "Ring deq updated %u times\n",
+			ring->deq_updates);
+	xhci_dbg(xhci, "Ring enq = %p (virt), 0x%llx (dma)\n",
+			ring->enqueue,
+			(unsigned long long)xhci_trb_virt_to_dma(ring->enq_seg,
+							    ring->enqueue));
+	xhci_dbg(xhci, "Ring enq updated %u times\n",
+			ring->enq_updates);
+}
+
+/**
+ * Debugging for an xHCI ring, which is a queue broken into multiple segments.
+ *
+ * Print out each segment in the ring.  Check that the DMA address in
+ * each link segment actually matches the segment's stored DMA address.
+ * Check that the link end bit is only set at the end of the ring.
+ * Check that the dequeue and enqueue pointers point to real data in this ring
+ * (not some other ring).
+ */
+void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+	/* FIXME: Throw an error if any segment doesn't have a Link TRB */
+	struct xhci_segment *seg;
+	struct xhci_segment *first_seg = ring->first_seg;
+	xhci_debug_segment(xhci, first_seg);
+
+	if (!ring->enq_updates && !ring->deq_updates) {
+		xhci_dbg(xhci, "  Ring has not been updated\n");
+		return;
+	}
+	for (seg = first_seg->next; seg != first_seg; seg = seg->next)
+		xhci_debug_segment(xhci, seg);
+}
+
+void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst)
+{
+	u32 addr = (u32) erst->erst_dma_addr;
+	int i;
+	struct xhci_erst_entry *entry;
+
+	for (i = 0; i < erst->num_entries; ++i) {
+		entry = &erst->entries[i];
+		xhci_dbg(xhci, "@%08x %08x %08x %08x %08x\n",
+				(unsigned int) addr,
+				(unsigned int) entry->seg_addr[0],
+				(unsigned int) entry->seg_addr[1],
+				(unsigned int) entry->seg_size,
+				(unsigned int) entry->rsvd);
+		addr += sizeof(*entry);
+	}
+}
+
+void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci)
+{
+	u32 val;
+
+	val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[0]);
+	xhci_dbg(xhci, "// xHC command ring deq ptr low bits + flags = 0x%x\n", val);
+	val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[1]);
+	xhci_dbg(xhci, "// xHC command ring deq ptr high bits = 0x%x\n", val);
+}
+
+void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep)
+{
+	int i, j;
+	int last_ep_ctx = 31;
+	/* Fields are 32 bits wide, DMA addresses are in bytes */
+	int field_size = 32 / 8;
+
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - drop flags\n",
+			&ctx->drop_flags, (unsigned long long)dma,
+			ctx->drop_flags);
+	dma += field_size;
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - add flags\n",
+			&ctx->add_flags, (unsigned long long)dma,
+			ctx->add_flags);
+	dma += field_size;
+	for (i = 0; i > 6; ++i) {
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+				&ctx->rsvd[i], (unsigned long long)dma,
+				ctx->rsvd[i], i);
+		dma += field_size;
+	}
+
+	xhci_dbg(xhci, "Slot Context:\n");
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info\n",
+			&ctx->slot.dev_info,
+			(unsigned long long)dma, ctx->slot.dev_info);
+	dma += field_size;
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_info2\n",
+			&ctx->slot.dev_info2,
+			(unsigned long long)dma, ctx->slot.dev_info2);
+	dma += field_size;
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tt_info\n",
+			&ctx->slot.tt_info,
+			(unsigned long long)dma, ctx->slot.tt_info);
+	dma += field_size;
+	xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - dev_state\n",
+			&ctx->slot.dev_state,
+			(unsigned long long)dma, ctx->slot.dev_state);
+	dma += field_size;
+	for (i = 0; i > 4; ++i) {
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+				&ctx->slot.reserved[i], (unsigned long long)dma,
+				ctx->slot.reserved[i], i);
+		dma += field_size;
+	}
+
+	if (last_ep < 31)
+		last_ep_ctx = last_ep + 1;
+	for (i = 0; i < last_ep_ctx; ++i) {
+		xhci_dbg(xhci, "Endpoint %02d Context:\n", i);
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info\n",
+				&ctx->ep[i].ep_info,
+				(unsigned long long)dma, ctx->ep[i].ep_info);
+		dma += field_size;
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - ep_info2\n",
+				&ctx->ep[i].ep_info2,
+				(unsigned long long)dma, ctx->ep[i].ep_info2);
+		dma += field_size;
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - deq[0]\n",
+				&ctx->ep[i].deq[0],
+				(unsigned long long)dma, ctx->ep[i].deq[0]);
+		dma += field_size;
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - deq[1]\n",
+				&ctx->ep[i].deq[1],
+				(unsigned long long)dma, ctx->ep[i].deq[1]);
+		dma += field_size;
+		xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - tx_info\n",
+				&ctx->ep[i].tx_info,
+				(unsigned long long)dma, ctx->ep[i].tx_info);
+		dma += field_size;
+		for (j = 0; j < 3; ++j) {
+			xhci_dbg(xhci, "@%p (virt) @%08llx (dma) %#08x - rsvd[%d]\n",
+					&ctx->ep[i].reserved[j],
+					(unsigned long long)dma,
+					ctx->ep[i].reserved[j], j);
+			dma += field_size;
+		}
+	}
+}
diff --git a/drivers/usb/host/xhci-ext-caps.h b/drivers/usb/host/xhci-ext-caps.h
new file mode 100644
index 000000000000..ecc131c3fe33
--- /dev/null
+++ b/drivers/usb/host/xhci-ext-caps.h
@@ -0,0 +1,145 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/* Up to 16 microframes to halt an HC - one microframe is 125 microsectonds */
+#define XHCI_MAX_HALT_USEC	(16*125)
+/* HC not running - set to 1 when run/stop bit is cleared. */
+#define XHCI_STS_HALT		(1<<0)
+
+/* HCCPARAMS offset from PCI base address */
+#define XHCI_HCC_PARAMS_OFFSET	0x10
+/* HCCPARAMS contains the first extended capability pointer */
+#define XHCI_HCC_EXT_CAPS(p)	(((p)>>16)&0xffff)
+
+/* Command and Status registers offset from the Operational Registers address */
+#define XHCI_CMD_OFFSET		0x00
+#define XHCI_STS_OFFSET		0x04
+
+#define XHCI_MAX_EXT_CAPS		50
+
+/* Capability Register */
+/* bits 7:0 - how long is the Capabilities register */
+#define XHCI_HC_LENGTH(p)	(((p)>>00)&0x00ff)
+
+/* Extended capability register fields */
+#define XHCI_EXT_CAPS_ID(p)	(((p)>>0)&0xff)
+#define XHCI_EXT_CAPS_NEXT(p)	(((p)>>8)&0xff)
+#define	XHCI_EXT_CAPS_VAL(p)	((p)>>16)
+/* Extended capability IDs - ID 0 reserved */
+#define XHCI_EXT_CAPS_LEGACY	1
+#define XHCI_EXT_CAPS_PROTOCOL	2
+#define XHCI_EXT_CAPS_PM	3
+#define XHCI_EXT_CAPS_VIRT	4
+#define XHCI_EXT_CAPS_ROUTE	5
+/* IDs 6-9 reserved */
+#define XHCI_EXT_CAPS_DEBUG	10
+/* USB Legacy Support Capability - section 7.1.1 */
+#define XHCI_HC_BIOS_OWNED	(1 << 16)
+#define XHCI_HC_OS_OWNED	(1 << 24)
+
+/* USB Legacy Support Capability - section 7.1.1 */
+/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
+#define XHCI_LEGACY_SUPPORT_OFFSET	(0x00)
+
+/* USB Legacy Support Control and Status Register  - section 7.1.2 */
+/* Add this offset, plus the value of xECP in HCCPARAMS to the base address */
+#define XHCI_LEGACY_CONTROL_OFFSET	(0x04)
+/* bits 1:2, 5:12, and 17:19 need to be preserved; bits 21:28 should be zero */
+#define	XHCI_LEGACY_DISABLE_SMI		((0x3 << 1) + (0xff << 5) + (0x7 << 17))
+
+/* command register values to disable interrupts and halt the HC */
+/* start/stop HC execution - do not write unless HC is halted*/
+#define XHCI_CMD_RUN		(1 << 0)
+/* Event Interrupt Enable - get irq when EINT bit is set in USBSTS register */
+#define XHCI_CMD_EIE		(1 << 2)
+/* Host System Error Interrupt Enable - get irq when HSEIE bit set in USBSTS */
+#define XHCI_CMD_HSEIE		(1 << 3)
+/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
+#define XHCI_CMD_EWE		(1 << 10)
+
+#define XHCI_IRQS		(XHCI_CMD_EIE | XHCI_CMD_HSEIE | XHCI_CMD_EWE)
+
+/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
+#define XHCI_STS_CNR		(1 << 11)
+
+#include <linux/io.h>
+
+/**
+ * Return the next extended capability pointer register.
+ *
+ * @base	PCI register base address.
+ *
+ * @ext_offset	Offset of the 32-bit register that contains the extended
+ * capabilites pointer.  If searching for the first extended capability, pass
+ * in XHCI_HCC_PARAMS_OFFSET.  If searching for the next extended capability,
+ * pass in the offset of the current extended capability register.
+ *
+ * Returns 0 if there is no next extended capability register or returns the register offset
+ * from the PCI registers base address.
+ */
+static inline int xhci_find_next_cap_offset(void __iomem *base, int ext_offset)
+{
+	u32 next;
+
+	next = readl(base + ext_offset);
+
+	if (ext_offset == XHCI_HCC_PARAMS_OFFSET)
+		/* Find the first extended capability */
+		next = XHCI_HCC_EXT_CAPS(next);
+	else
+		/* Find the next extended capability */
+		next = XHCI_EXT_CAPS_NEXT(next);
+	if (!next)
+		return 0;
+	/*
+	 * Address calculation from offset of extended capabilities
+	 * (or HCCPARAMS) register - see section 5.3.6 and section 7.
+	 */
+	return ext_offset + (next << 2);
+}
+
+/**
+ * Find the offset of the extended capabilities with capability ID id.
+ *
+ * @base PCI MMIO registers base address.
+ * @ext_offset Offset from base of the first extended capability to look at,
+ * 		or the address of HCCPARAMS.
+ * @id Extended capability ID to search for.
+ *
+ * This uses an arbitrary limit of XHCI_MAX_EXT_CAPS extended capabilities
+ * to make sure that the list doesn't contain a loop.
+ */
+static inline int xhci_find_ext_cap_by_id(void __iomem *base, int ext_offset, int id)
+{
+	u32 val;
+	int limit = XHCI_MAX_EXT_CAPS;
+
+	while (ext_offset && limit > 0) {
+		val = readl(base + ext_offset);
+		if (XHCI_EXT_CAPS_ID(val) == id)
+			break;
+		ext_offset = xhci_find_next_cap_offset(base, ext_offset);
+		limit--;
+	}
+	if (limit > 0)
+		return ext_offset;
+	return 0;
+}
diff --git a/drivers/usb/host/xhci-hcd.c b/drivers/usb/host/xhci-hcd.c
new file mode 100644
index 000000000000..c6b921994b28
--- /dev/null
+++ b/drivers/usb/host/xhci-hcd.c
@@ -0,0 +1,1256 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/irq.h>
+#include <linux/module.h>
+
+#include "xhci.h"
+
+#define DRIVER_AUTHOR "Sarah Sharp"
+#define DRIVER_DESC "'eXtensible' Host Controller (xHC) Driver"
+
+/* TODO: copied from ehci-hcd.c - can this be refactored? */
+/*
+ * 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).
+ */
+static int handshake(struct xhci_hcd *xhci, void __iomem *ptr,
+		      u32 mask, u32 done, int usec)
+{
+	u32	result;
+
+	do {
+		result = xhci_readl(xhci, 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 into halt state.
+ *
+ * Disable any IRQs and clear the run/stop bit.
+ * HC will complete any current and actively pipelined transactions, and
+ * should halt within 16 microframes of the run/stop bit being cleared.
+ * Read HC Halted bit in the status register to see when the HC is finished.
+ * XXX: shouldn't we set HC_STATE_HALT here somewhere?
+ */
+int xhci_halt(struct xhci_hcd *xhci)
+{
+	u32 halted;
+	u32 cmd;
+	u32 mask;
+
+	xhci_dbg(xhci, "// Halt the HC\n");
+	/* Disable all interrupts from the host controller */
+	mask = ~(XHCI_IRQS);
+	halted = xhci_readl(xhci, &xhci->op_regs->status) & STS_HALT;
+	if (!halted)
+		mask &= ~CMD_RUN;
+
+	cmd = xhci_readl(xhci, &xhci->op_regs->command);
+	cmd &= mask;
+	xhci_writel(xhci, cmd, &xhci->op_regs->command);
+
+	return handshake(xhci, &xhci->op_regs->status,
+			STS_HALT, STS_HALT, XHCI_MAX_HALT_USEC);
+}
+
+/*
+ * Reset a halted HC, and set the internal HC state to HC_STATE_HALT.
+ *
+ * This resets pipelines, timers, counters, state machines, etc.
+ * Transactions will be terminated immediately, and operational registers
+ * will be set to their defaults.
+ */
+int xhci_reset(struct xhci_hcd *xhci)
+{
+	u32 command;
+	u32 state;
+
+	state = xhci_readl(xhci, &xhci->op_regs->status);
+	BUG_ON((state & STS_HALT) == 0);
+
+	xhci_dbg(xhci, "// Reset the HC\n");
+	command = xhci_readl(xhci, &xhci->op_regs->command);
+	command |= CMD_RESET;
+	xhci_writel(xhci, command, &xhci->op_regs->command);
+	/* XXX: Why does EHCI set this here?  Shouldn't other code do this? */
+	xhci_to_hcd(xhci)->state = HC_STATE_HALT;
+
+	return handshake(xhci, &xhci->op_regs->command, CMD_RESET, 0, 250 * 1000);
+}
+
+/*
+ * Stop the HC from processing the endpoint queues.
+ */
+static void xhci_quiesce(struct xhci_hcd *xhci)
+{
+	/*
+	 * Queues are per endpoint, so we need to disable an endpoint or slot.
+	 *
+	 * To disable a slot, we need to insert a disable slot command on the
+	 * command ring and ring the doorbell.  This will also free any internal
+	 * resources associated with the slot (which might not be what we want).
+	 *
+	 * A Release Endpoint command sounds better - doesn't free internal HC
+	 * memory, but removes the endpoints from the schedule and releases the
+	 * bandwidth, disables the doorbells, and clears the endpoint enable
+	 * flag.  Usually used prior to a set interface command.
+	 *
+	 * TODO: Implement after command ring code is done.
+	 */
+	BUG_ON(!HC_IS_RUNNING(xhci_to_hcd(xhci)->state));
+	xhci_dbg(xhci, "Finished quiescing -- code not written yet\n");
+}
+
+#if 0
+/* Set up MSI-X table for entry 0 (may claim other entries later) */
+static int xhci_setup_msix(struct xhci_hcd *xhci)
+{
+	int ret;
+	struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+
+	xhci->msix_count = 0;
+	/* XXX: did I do this right?  ixgbe does kcalloc for more than one */
+	xhci->msix_entries = kmalloc(sizeof(struct msix_entry), GFP_KERNEL);
+	if (!xhci->msix_entries) {
+		xhci_err(xhci, "Failed to allocate MSI-X entries\n");
+		return -ENOMEM;
+	}
+	xhci->msix_entries[0].entry = 0;
+
+	ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
+	if (ret) {
+		xhci_err(xhci, "Failed to enable MSI-X\n");
+		goto free_entries;
+	}
+
+	/*
+	 * Pass the xhci pointer value as the request_irq "cookie".
+	 * If more irqs are added, this will need to be unique for each one.
+	 */
+	ret = request_irq(xhci->msix_entries[0].vector, &xhci_irq, 0,
+			"xHCI", xhci_to_hcd(xhci));
+	if (ret) {
+		xhci_err(xhci, "Failed to allocate MSI-X interrupt\n");
+		goto disable_msix;
+	}
+	xhci_dbg(xhci, "Finished setting up MSI-X\n");
+	return 0;
+
+disable_msix:
+	pci_disable_msix(pdev);
+free_entries:
+	kfree(xhci->msix_entries);
+	xhci->msix_entries = NULL;
+	return ret;
+}
+
+/* XXX: code duplication; can xhci_setup_msix call this? */
+/* Free any IRQs and disable MSI-X */
+static void xhci_cleanup_msix(struct xhci_hcd *xhci)
+{
+	struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+	if (!xhci->msix_entries)
+		return;
+
+	free_irq(xhci->msix_entries[0].vector, xhci);
+	pci_disable_msix(pdev);
+	kfree(xhci->msix_entries);
+	xhci->msix_entries = NULL;
+	xhci_dbg(xhci, "Finished cleaning up MSI-X\n");
+}
+#endif
+
+/*
+ * Initialize memory for HCD and xHC (one-time init).
+ *
+ * Program the PAGESIZE register, initialize the device context array, create
+ * device contexts (?), set up a command ring segment (or two?), create event
+ * ring (one for now).
+ */
+int xhci_init(struct usb_hcd *hcd)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	int retval = 0;
+
+	xhci_dbg(xhci, "xhci_init\n");
+	spin_lock_init(&xhci->lock);
+	retval = xhci_mem_init(xhci, GFP_KERNEL);
+	xhci_dbg(xhci, "Finished xhci_init\n");
+
+	return retval;
+}
+
+/*
+ * Called in interrupt context when there might be work
+ * queued on the event ring
+ *
+ * xhci->lock must be held by caller.
+ */
+static void xhci_work(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	/*
+	 * Clear the op reg interrupt status first,
+	 * so we can receive interrupts from other MSI-X interrupters.
+	 * Write 1 to clear the interrupt status.
+	 */
+	temp = xhci_readl(xhci, &xhci->op_regs->status);
+	temp |= STS_EINT;
+	xhci_writel(xhci, temp, &xhci->op_regs->status);
+	/* FIXME when MSI-X is supported and there are multiple vectors */
+	/* Clear the MSI-X event interrupt status */
+
+	/* Acknowledge the interrupt */
+	temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+	temp |= 0x3;
+	xhci_writel(xhci, temp, &xhci->ir_set->irq_pending);
+	/* Flush posted writes */
+	xhci_readl(xhci, &xhci->ir_set->irq_pending);
+
+	/* FIXME this should be a delayed service routine that clears the EHB */
+	xhci_handle_event(xhci);
+
+	/* Clear the event handler busy flag; the event ring should be empty. */
+	temp = xhci_readl(xhci, &xhci->ir_set->erst_dequeue[0]);
+	xhci_writel(xhci, temp & ~ERST_EHB, &xhci->ir_set->erst_dequeue[0]);
+	/* Flush posted writes -- FIXME is this necessary? */
+	xhci_readl(xhci, &xhci->ir_set->irq_pending);
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*
+ * xHCI spec says we can get an interrupt, and if the HC has an error condition,
+ * we might get bad data out of the event ring.  Section 4.10.2.7 has a list of
+ * indicators of an event TRB error, but we check the status *first* to be safe.
+ */
+irqreturn_t xhci_irq(struct usb_hcd *hcd)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	u32 temp, temp2;
+
+	spin_lock(&xhci->lock);
+	/* Check if the xHC generated the interrupt, or the irq is shared */
+	temp = xhci_readl(xhci, &xhci->op_regs->status);
+	temp2 = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+	if (!(temp & STS_EINT) && !ER_IRQ_PENDING(temp2)) {
+		spin_unlock(&xhci->lock);
+		return IRQ_NONE;
+	}
+
+	if (temp & STS_FATAL) {
+		xhci_warn(xhci, "WARNING: Host System Error\n");
+		xhci_halt(xhci);
+		xhci_to_hcd(xhci)->state = HC_STATE_HALT;
+		spin_unlock(&xhci->lock);
+		return -ESHUTDOWN;
+	}
+
+	xhci_work(xhci);
+	spin_unlock(&xhci->lock);
+
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
+void xhci_event_ring_work(unsigned long arg)
+{
+	unsigned long flags;
+	int temp;
+	struct xhci_hcd *xhci = (struct xhci_hcd *) arg;
+	int i, j;
+
+	xhci_dbg(xhci, "Poll event ring: %lu\n", jiffies);
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	temp = xhci_readl(xhci, &xhci->op_regs->status);
+	xhci_dbg(xhci, "op reg status = 0x%x\n", temp);
+	temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+	xhci_dbg(xhci, "ir_set 0 pending = 0x%x\n", temp);
+	xhci_dbg(xhci, "No-op commands handled = %d\n", xhci->noops_handled);
+	xhci_dbg(xhci, "HC error bitmask = 0x%x\n", xhci->error_bitmask);
+	xhci->error_bitmask = 0;
+	xhci_dbg(xhci, "Event ring:\n");
+	xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
+	xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
+	temp = xhci_readl(xhci, &xhci->ir_set->erst_dequeue[0]);
+	temp &= ERST_PTR_MASK;
+	xhci_dbg(xhci, "ERST deq = 0x%x\n", temp);
+	xhci_dbg(xhci, "Command ring:\n");
+	xhci_debug_segment(xhci, xhci->cmd_ring->deq_seg);
+	xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
+	xhci_dbg_cmd_ptrs(xhci);
+	for (i = 0; i < MAX_HC_SLOTS; ++i) {
+		if (xhci->devs[i]) {
+			for (j = 0; j < 31; ++j) {
+				if (xhci->devs[i]->ep_rings[j]) {
+					xhci_dbg(xhci, "Dev %d endpoint ring %d:\n", i, j);
+					xhci_debug_segment(xhci, xhci->devs[i]->ep_rings[j]->deq_seg);
+				}
+			}
+		}
+	}
+
+	if (xhci->noops_submitted != NUM_TEST_NOOPS)
+		if (xhci_setup_one_noop(xhci))
+			xhci_ring_cmd_db(xhci);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	if (!xhci->zombie)
+		mod_timer(&xhci->event_ring_timer, jiffies + POLL_TIMEOUT * HZ);
+	else
+		xhci_dbg(xhci, "Quit polling the event ring.\n");
+}
+#endif
+
+/*
+ * Start the HC after it was halted.
+ *
+ * This function is called by the USB core when the HC driver is added.
+ * Its opposite is xhci_stop().
+ *
+ * xhci_init() must be called once before this function can be called.
+ * Reset the HC, enable device slot contexts, program DCBAAP, and
+ * set command ring pointer and event ring pointer.
+ *
+ * Setup MSI-X vectors and enable interrupts.
+ */
+int xhci_run(struct usb_hcd *hcd)
+{
+	u32 temp;
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	void (*doorbell)(struct xhci_hcd *) = NULL;
+
+	hcd->uses_new_polling = 1;
+	hcd->poll_rh = 0;
+
+	xhci_dbg(xhci, "xhci_run\n");
+#if 0	/* FIXME: MSI not setup yet */
+	/* Do this at the very last minute */
+	ret = xhci_setup_msix(xhci);
+	if (!ret)
+		return ret;
+
+	return -ENOSYS;
+#endif
+#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
+	init_timer(&xhci->event_ring_timer);
+	xhci->event_ring_timer.data = (unsigned long) xhci;
+	xhci->event_ring_timer.function = xhci_event_ring_work;
+	/* Poll the event ring */
+	xhci->event_ring_timer.expires = jiffies + POLL_TIMEOUT * HZ;
+	xhci->zombie = 0;
+	xhci_dbg(xhci, "Setting event ring polling timer\n");
+	add_timer(&xhci->event_ring_timer);
+#endif
+
+	xhci_dbg(xhci, "// Set the interrupt modulation register\n");
+	temp = xhci_readl(xhci, &xhci->ir_set->irq_control);
+	temp &= 0xffff;
+	temp |= (u32) 160;
+	xhci_writel(xhci, temp, &xhci->ir_set->irq_control);
+
+	/* Set the HCD state before we enable the irqs */
+	hcd->state = HC_STATE_RUNNING;
+	temp = xhci_readl(xhci, &xhci->op_regs->command);
+	temp |= (CMD_EIE);
+	xhci_dbg(xhci, "// Enable interrupts, cmd = 0x%x.\n",
+			temp);
+	xhci_writel(xhci, temp, &xhci->op_regs->command);
+
+	temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+	xhci_dbg(xhci, "// Enabling event ring interrupter %p by writing 0x%x to irq_pending\n",
+			xhci->ir_set, (unsigned int) ER_IRQ_ENABLE(temp));
+	xhci_writel(xhci, ER_IRQ_ENABLE(temp),
+			&xhci->ir_set->irq_pending);
+	xhci_print_ir_set(xhci, xhci->ir_set, 0);
+
+	if (NUM_TEST_NOOPS > 0)
+		doorbell = xhci_setup_one_noop(xhci);
+
+	xhci_dbg(xhci, "Command ring memory map follows:\n");
+	xhci_debug_ring(xhci, xhci->cmd_ring);
+	xhci_dbg_ring_ptrs(xhci, xhci->cmd_ring);
+	xhci_dbg_cmd_ptrs(xhci);
+
+	xhci_dbg(xhci, "ERST memory map follows:\n");
+	xhci_dbg_erst(xhci, &xhci->erst);
+	xhci_dbg(xhci, "Event ring:\n");
+	xhci_debug_ring(xhci, xhci->event_ring);
+	xhci_dbg_ring_ptrs(xhci, xhci->event_ring);
+	temp = xhci_readl(xhci, &xhci->ir_set->erst_dequeue[0]);
+	temp &= ERST_PTR_MASK;
+	xhci_dbg(xhci, "ERST deq = 0x%x\n", temp);
+	temp = xhci_readl(xhci, &xhci->ir_set->erst_dequeue[1]);
+	xhci_dbg(xhci, "ERST deq upper = 0x%x\n", temp);
+
+	temp = xhci_readl(xhci, &xhci->op_regs->command);
+	temp |= (CMD_RUN);
+	xhci_dbg(xhci, "// Turn on HC, cmd = 0x%x.\n",
+			temp);
+	xhci_writel(xhci, temp, &xhci->op_regs->command);
+	/* Flush PCI posted writes */
+	temp = xhci_readl(xhci, &xhci->op_regs->command);
+	xhci_dbg(xhci, "// @%p = 0x%x\n", &xhci->op_regs->command, temp);
+	if (doorbell)
+		(*doorbell)(xhci);
+
+	xhci_dbg(xhci, "Finished xhci_run\n");
+	return 0;
+}
+
+/*
+ * Stop xHCI driver.
+ *
+ * This function is called by the USB core when the HC driver is removed.
+ * Its opposite is xhci_run().
+ *
+ * Disable device contexts, disable IRQs, and quiesce the HC.
+ * Reset the HC, finish any completed transactions, and cleanup memory.
+ */
+void xhci_stop(struct usb_hcd *hcd)
+{
+	u32 temp;
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+	spin_lock_irq(&xhci->lock);
+	if (HC_IS_RUNNING(hcd->state))
+		xhci_quiesce(xhci);
+	xhci_halt(xhci);
+	xhci_reset(xhci);
+	spin_unlock_irq(&xhci->lock);
+
+#if 0	/* No MSI yet */
+	xhci_cleanup_msix(xhci);
+#endif
+#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
+	/* Tell the event ring poll function not to reschedule */
+	xhci->zombie = 1;
+	del_timer_sync(&xhci->event_ring_timer);
+#endif
+
+	xhci_dbg(xhci, "// Disabling event ring interrupts\n");
+	temp = xhci_readl(xhci, &xhci->op_regs->status);
+	xhci_writel(xhci, temp & ~STS_EINT, &xhci->op_regs->status);
+	temp = xhci_readl(xhci, &xhci->ir_set->irq_pending);
+	xhci_writel(xhci, ER_IRQ_DISABLE(temp),
+			&xhci->ir_set->irq_pending);
+	xhci_print_ir_set(xhci, xhci->ir_set, 0);
+
+	xhci_dbg(xhci, "cleaning up memory\n");
+	xhci_mem_cleanup(xhci);
+	xhci_dbg(xhci, "xhci_stop completed - status = %x\n",
+		    xhci_readl(xhci, &xhci->op_regs->status));
+}
+
+/*
+ * Shutdown HC (not bus-specific)
+ *
+ * This is called when the machine is rebooting or halting.  We assume that the
+ * machine will be powered off, and the HC's internal state will be reset.
+ * Don't bother to free memory.
+ */
+void xhci_shutdown(struct usb_hcd *hcd)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+
+	spin_lock_irq(&xhci->lock);
+	xhci_halt(xhci);
+	spin_unlock_irq(&xhci->lock);
+
+#if 0
+	xhci_cleanup_msix(xhci);
+#endif
+
+	xhci_dbg(xhci, "xhci_shutdown completed - status = %x\n",
+		    xhci_readl(xhci, &xhci->op_regs->status));
+}
+
+/*-------------------------------------------------------------------------*/
+
+/**
+ * xhci_get_endpoint_index - Used for passing endpoint bitmasks between the core and
+ * HCDs.  Find the index for an endpoint given its descriptor.  Use the return
+ * value to right shift 1 for the bitmask.
+ *
+ * Index  = (epnum * 2) + direction - 1,
+ * where direction = 0 for OUT, 1 for IN.
+ * For control endpoints, the IN index is used (OUT index is unused), so
+ * index = (epnum * 2) + direction - 1 = (epnum * 2) + 1 - 1 = (epnum * 2)
+ */
+unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc)
+{
+	unsigned int index;
+	if (usb_endpoint_xfer_control(desc))
+		index = (unsigned int) (usb_endpoint_num(desc)*2);
+	else
+		index = (unsigned int) (usb_endpoint_num(desc)*2) +
+			(usb_endpoint_dir_in(desc) ? 1 : 0) - 1;
+	return index;
+}
+
+/* Find the flag for this endpoint (for use in the control context).  Use the
+ * endpoint index to create a bitmask.  The slot context is bit 0, endpoint 0 is
+ * bit 1, etc.
+ */
+unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc)
+{
+	return 1 << (xhci_get_endpoint_index(desc) + 1);
+}
+
+/* Compute the last valid endpoint context index.  Basically, this is the
+ * endpoint index plus one.  For slot contexts with more than valid endpoint,
+ * we find the most significant bit set in the added contexts flags.
+ * e.g. ep 1 IN (with epnum 0x81) => added_ctxs = 0b1000
+ * fls(0b1000) = 4, but the endpoint context index is 3, so subtract one.
+ */
+static inline unsigned int xhci_last_valid_endpoint(u32 added_ctxs)
+{
+	return fls(added_ctxs) - 1;
+}
+
+/* Returns 1 if the arguments are OK;
+ * returns 0 this is a root hub; returns -EINVAL for NULL pointers.
+ */
+int xhci_check_args(struct usb_hcd *hcd, struct usb_device *udev,
+		struct usb_host_endpoint *ep, int check_ep, const char *func) {
+	if (!hcd || (check_ep && !ep) || !udev) {
+		printk(KERN_DEBUG "xHCI %s called with invalid args\n",
+				func);
+		return -EINVAL;
+	}
+	if (!udev->parent) {
+		printk(KERN_DEBUG "xHCI %s called for root hub\n",
+				func);
+		return 0;
+	}
+	if (!udev->slot_id) {
+		printk(KERN_DEBUG "xHCI %s called with unaddressed device\n",
+				func);
+		return -EINVAL;
+	}
+	return 1;
+}
+
+/*
+ * non-error returns are a promise to giveback() the urb later
+ * we drop ownership so next owner (or urb unlink) can get it
+ */
+int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	unsigned long flags;
+	int ret = 0;
+	unsigned int slot_id, ep_index;
+
+	if (!urb || xhci_check_args(hcd, urb->dev, urb->ep, true, __func__) <= 0)
+		return -EINVAL;
+
+	slot_id = urb->dev->slot_id;
+	ep_index = xhci_get_endpoint_index(&urb->ep->desc);
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!xhci->devs || !xhci->devs[slot_id]) {
+		if (!in_interrupt())
+			dev_warn(&urb->dev->dev, "WARN: urb submitted for dev with no Slot ID\n");
+		ret = -EINVAL;
+		goto exit;
+	}
+	if (!test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+		if (!in_interrupt())
+			xhci_dbg(xhci, "urb submitted during PCI suspend\n");
+		ret = -ESHUTDOWN;
+		goto exit;
+	}
+	if (usb_endpoint_xfer_control(&urb->ep->desc))
+		ret = xhci_queue_ctrl_tx(xhci, mem_flags, urb,
+				slot_id, ep_index);
+	else if (usb_endpoint_xfer_bulk(&urb->ep->desc))
+		ret = xhci_queue_bulk_tx(xhci, mem_flags, urb,
+				slot_id, ep_index);
+	else
+		ret = -EINVAL;
+exit:
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return ret;
+}
+
+/*
+ * Remove the URB's TD from the endpoint ring.  This may cause the HC to stop
+ * USB transfers, potentially stopping in the middle of a TRB buffer.  The HC
+ * should pick up where it left off in the TD, unless a Set Transfer Ring
+ * Dequeue Pointer is issued.
+ *
+ * The TRBs that make up the buffers for the canceled URB will be "removed" from
+ * the ring.  Since the ring is a contiguous structure, they can't be physically
+ * removed.  Instead, there are two options:
+ *
+ *  1) If the HC is in the middle of processing the URB to be canceled, we
+ *     simply move the ring's dequeue pointer past those TRBs using the Set
+ *     Transfer Ring Dequeue Pointer command.  This will be the common case,
+ *     when drivers timeout on the last submitted URB and attempt to cancel.
+ *
+ *  2) If the HC is in the middle of a different TD, we turn the TRBs into a
+ *     series of 1-TRB transfer no-op TDs.  (No-ops shouldn't be chained.)  The
+ *     HC will need to invalidate the any TRBs it has cached after the stop
+ *     endpoint command, as noted in the xHCI 0.95 errata.
+ *
+ *  3) The TD may have completed by the time the Stop Endpoint Command
+ *     completes, so software needs to handle that case too.
+ *
+ * This function should protect against the TD enqueueing code ringing the
+ * doorbell while this code is waiting for a Stop Endpoint command to complete.
+ * It also needs to account for multiple cancellations on happening at the same
+ * time for the same endpoint.
+ *
+ * Note that this function can be called in any context, or so says
+ * usb_hcd_unlink_urb()
+ */
+int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
+{
+	unsigned long flags;
+	int ret;
+	struct xhci_hcd *xhci;
+	struct xhci_td *td;
+	unsigned int ep_index;
+	struct xhci_ring *ep_ring;
+
+	xhci = hcd_to_xhci(hcd);
+	spin_lock_irqsave(&xhci->lock, flags);
+	/* Make sure the URB hasn't completed or been unlinked already */
+	ret = usb_hcd_check_unlink_urb(hcd, urb, status);
+	if (ret || !urb->hcpriv)
+		goto done;
+
+	xhci_dbg(xhci, "Cancel URB %p\n", urb);
+	ep_index = xhci_get_endpoint_index(&urb->ep->desc);
+	ep_ring = xhci->devs[urb->dev->slot_id]->ep_rings[ep_index];
+	td = (struct xhci_td *) urb->hcpriv;
+
+	ep_ring->cancels_pending++;
+	list_add_tail(&td->cancelled_td_list, &ep_ring->cancelled_td_list);
+	/* Queue a stop endpoint command, but only if this is
+	 * the first cancellation to be handled.
+	 */
+	if (ep_ring->cancels_pending == 1) {
+		xhci_queue_stop_endpoint(xhci, urb->dev->slot_id, ep_index);
+		xhci_ring_cmd_db(xhci);
+	}
+done:
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return ret;
+}
+
+/* Drop an endpoint from a new bandwidth configuration for this device.
+ * Only one call to this function is allowed per endpoint before
+ * check_bandwidth() or reset_bandwidth() must be called.
+ * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
+ * add the endpoint to the schedule with possibly new parameters denoted by a
+ * different endpoint descriptor in usb_host_endpoint.
+ * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
+ * not allowed.
+ */
+int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
+		struct usb_host_endpoint *ep)
+{
+	unsigned long flags;
+	struct xhci_hcd *xhci;
+	struct xhci_device_control *in_ctx;
+	unsigned int last_ctx;
+	unsigned int ep_index;
+	struct xhci_ep_ctx *ep_ctx;
+	u32 drop_flag;
+	u32 new_add_flags, new_drop_flags, new_slot_info;
+	int ret;
+
+	ret = xhci_check_args(hcd, udev, ep, 1, __func__);
+	if (ret <= 0)
+		return ret;
+	xhci = hcd_to_xhci(hcd);
+	xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
+
+	drop_flag = xhci_get_endpoint_flag(&ep->desc);
+	if (drop_flag == SLOT_FLAG || drop_flag == EP0_FLAG) {
+		xhci_dbg(xhci, "xHCI %s - can't drop slot or ep 0 %#x\n",
+				__func__, drop_flag);
+		return 0;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!xhci->devs || !xhci->devs[udev->slot_id]) {
+		xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
+				__func__);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return -EINVAL;
+	}
+
+	in_ctx = xhci->devs[udev->slot_id]->in_ctx;
+	ep_index = xhci_get_endpoint_index(&ep->desc);
+	ep_ctx = &xhci->devs[udev->slot_id]->out_ctx->ep[ep_index];
+	/* If the HC already knows the endpoint is disabled,
+	 * or the HCD has noted it is disabled, ignore this request
+	 */
+	if ((ep_ctx->ep_info & EP_STATE_MASK) == EP_STATE_DISABLED ||
+			in_ctx->drop_flags & xhci_get_endpoint_flag(&ep->desc)) {
+		xhci_warn(xhci, "xHCI %s called with disabled ep %p\n",
+				__func__, ep);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return 0;
+	}
+
+	in_ctx->drop_flags |= drop_flag;
+	new_drop_flags = in_ctx->drop_flags;
+
+	in_ctx->add_flags = ~drop_flag;
+	new_add_flags = in_ctx->add_flags;
+
+	last_ctx = xhci_last_valid_endpoint(in_ctx->add_flags);
+	/* Update the last valid endpoint context, if we deleted the last one */
+	if ((in_ctx->slot.dev_info & LAST_CTX_MASK) > LAST_CTX(last_ctx)) {
+		in_ctx->slot.dev_info &= ~LAST_CTX_MASK;
+		in_ctx->slot.dev_info |= LAST_CTX(last_ctx);
+	}
+	new_slot_info = in_ctx->slot.dev_info;
+
+	xhci_endpoint_zero(xhci, xhci->devs[udev->slot_id], ep);
+
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	xhci_dbg(xhci, "drop ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
+			(unsigned int) ep->desc.bEndpointAddress,
+			udev->slot_id,
+			(unsigned int) new_drop_flags,
+			(unsigned int) new_add_flags,
+			(unsigned int) new_slot_info);
+	return 0;
+}
+
+/* Add an endpoint to a new possible bandwidth configuration for this device.
+ * Only one call to this function is allowed per endpoint before
+ * check_bandwidth() or reset_bandwidth() must be called.
+ * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
+ * add the endpoint to the schedule with possibly new parameters denoted by a
+ * different endpoint descriptor in usb_host_endpoint.
+ * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
+ * not allowed.
+ */
+int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev,
+		struct usb_host_endpoint *ep)
+{
+	unsigned long flags;
+	struct xhci_hcd *xhci;
+	struct xhci_device_control *in_ctx;
+	unsigned int ep_index;
+	struct xhci_ep_ctx *ep_ctx;
+	u32 added_ctxs;
+	unsigned int last_ctx;
+	u32 new_add_flags, new_drop_flags, new_slot_info;
+	int ret = 0;
+
+	ret = xhci_check_args(hcd, udev, ep, 1, __func__);
+	if (ret <= 0)
+		return ret;
+	xhci = hcd_to_xhci(hcd);
+
+	added_ctxs = xhci_get_endpoint_flag(&ep->desc);
+	last_ctx = xhci_last_valid_endpoint(added_ctxs);
+	if (added_ctxs == SLOT_FLAG || added_ctxs == EP0_FLAG) {
+		/* FIXME when we have to issue an evaluate endpoint command to
+		 * deal with ep0 max packet size changing once we get the
+		 * descriptors
+		 */
+		xhci_dbg(xhci, "xHCI %s - can't add slot or ep 0 %#x\n",
+				__func__, added_ctxs);
+		return 0;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!xhci->devs || !xhci->devs[udev->slot_id]) {
+		xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
+				__func__);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return -EINVAL;
+	}
+
+	in_ctx = xhci->devs[udev->slot_id]->in_ctx;
+	ep_index = xhci_get_endpoint_index(&ep->desc);
+	ep_ctx = &xhci->devs[udev->slot_id]->out_ctx->ep[ep_index];
+	/* If the HCD has already noted the endpoint is enabled,
+	 * ignore this request.
+	 */
+	if (in_ctx->add_flags & xhci_get_endpoint_flag(&ep->desc)) {
+		xhci_warn(xhci, "xHCI %s called with enabled ep %p\n",
+				__func__, ep);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return 0;
+	}
+
+	if (xhci_endpoint_init(xhci, xhci->devs[udev->slot_id], udev, ep) < 0) {
+		dev_dbg(&udev->dev, "%s - could not initialize ep %#x\n",
+				__func__, ep->desc.bEndpointAddress);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return -ENOMEM;
+	}
+
+	in_ctx->add_flags |= added_ctxs;
+	new_add_flags = in_ctx->add_flags;
+
+	/* If xhci_endpoint_disable() was called for this endpoint, but the
+	 * xHC hasn't been notified yet through the check_bandwidth() call,
+	 * this re-adds a new state for the endpoint from the new endpoint
+	 * descriptors.  We must drop and re-add this endpoint, so we leave the
+	 * drop flags alone.
+	 */
+	new_drop_flags = in_ctx->drop_flags;
+
+	/* Update the last valid endpoint context, if we just added one past */
+	if ((in_ctx->slot.dev_info & LAST_CTX_MASK) < LAST_CTX(last_ctx)) {
+		in_ctx->slot.dev_info &= ~LAST_CTX_MASK;
+		in_ctx->slot.dev_info |= LAST_CTX(last_ctx);
+	}
+	new_slot_info = in_ctx->slot.dev_info;
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	xhci_dbg(xhci, "add ep 0x%x, slot id %d, new drop flags = %#x, new add flags = %#x, new slot info = %#x\n",
+			(unsigned int) ep->desc.bEndpointAddress,
+			udev->slot_id,
+			(unsigned int) new_drop_flags,
+			(unsigned int) new_add_flags,
+			(unsigned int) new_slot_info);
+	return 0;
+}
+
+static void xhci_zero_in_ctx(struct xhci_virt_device *virt_dev)
+{
+	struct xhci_ep_ctx *ep_ctx;
+	int i;
+
+	/* When a device's add flag and drop flag are zero, any subsequent
+	 * configure endpoint command will leave that endpoint's state
+	 * untouched.  Make sure we don't leave any old state in the input
+	 * endpoint contexts.
+	 */
+	virt_dev->in_ctx->drop_flags = 0;
+	virt_dev->in_ctx->add_flags = 0;
+	virt_dev->in_ctx->slot.dev_info &= ~LAST_CTX_MASK;
+	/* Endpoint 0 is always valid */
+	virt_dev->in_ctx->slot.dev_info |= LAST_CTX(1);
+	for (i = 1; i < 31; ++i) {
+		ep_ctx = &virt_dev->in_ctx->ep[i];
+		ep_ctx->ep_info = 0;
+		ep_ctx->ep_info2 = 0;
+		ep_ctx->deq[0] = 0;
+		ep_ctx->deq[1] = 0;
+		ep_ctx->tx_info = 0;
+	}
+}
+
+int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	int i;
+	int ret = 0;
+	int timeleft;
+	unsigned long flags;
+	struct xhci_hcd *xhci;
+	struct xhci_virt_device	*virt_dev;
+
+	ret = xhci_check_args(hcd, udev, NULL, 0, __func__);
+	if (ret <= 0)
+		return ret;
+	xhci = hcd_to_xhci(hcd);
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!udev->slot_id || !xhci->devs || !xhci->devs[udev->slot_id]) {
+		xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
+				__func__);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return -EINVAL;
+	}
+	xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
+	virt_dev = xhci->devs[udev->slot_id];
+
+	/* See section 4.6.6 - A0 = 1; A1 = D0 = D1 = 0 */
+	virt_dev->in_ctx->add_flags |= SLOT_FLAG;
+	virt_dev->in_ctx->add_flags &= ~EP0_FLAG;
+	virt_dev->in_ctx->drop_flags &= ~SLOT_FLAG;
+	virt_dev->in_ctx->drop_flags &= ~EP0_FLAG;
+	xhci_dbg(xhci, "New Input Control Context:\n");
+	xhci_dbg_ctx(xhci, virt_dev->in_ctx, virt_dev->in_ctx_dma,
+			LAST_CTX_TO_EP_NUM(virt_dev->in_ctx->slot.dev_info));
+
+	ret = xhci_queue_configure_endpoint(xhci, virt_dev->in_ctx_dma,
+			udev->slot_id);
+	if (ret < 0) {
+		xhci_dbg(xhci, "FIXME allocate a new ring segment\n");
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return -ENOMEM;
+	}
+	xhci_ring_cmd_db(xhci);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	/* Wait for the configure endpoint command to complete */
+	timeleft = wait_for_completion_interruptible_timeout(
+			&virt_dev->cmd_completion,
+			USB_CTRL_SET_TIMEOUT);
+	if (timeleft <= 0) {
+		xhci_warn(xhci, "%s while waiting for configure endpoint command\n",
+				timeleft == 0 ? "Timeout" : "Signal");
+		/* FIXME cancel the configure endpoint command */
+		return -ETIME;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	switch (virt_dev->cmd_status) {
+	case COMP_ENOMEM:
+		dev_warn(&udev->dev, "Not enough host controller resources "
+				"for new device state.\n");
+		ret = -ENOMEM;
+		/* FIXME: can we allocate more resources for the HC? */
+		break;
+	case COMP_BW_ERR:
+		dev_warn(&udev->dev, "Not enough bandwidth "
+				"for new device state.\n");
+		ret = -ENOSPC;
+		/* FIXME: can we go back to the old state? */
+		break;
+	case COMP_TRB_ERR:
+		/* the HCD set up something wrong */
+		dev_warn(&udev->dev, "ERROR: Endpoint drop flag = 0, add flag = 1, "
+				"and endpoint is not disabled.\n");
+		ret = -EINVAL;
+		break;
+	case COMP_SUCCESS:
+		dev_dbg(&udev->dev, "Successful Endpoint Configure command\n");
+		break;
+	default:
+		xhci_err(xhci, "ERROR: unexpected command completion "
+				"code 0x%x.\n", virt_dev->cmd_status);
+		ret = -EINVAL;
+		break;
+	}
+	if (ret) {
+		/* Callee should call reset_bandwidth() */
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return ret;
+	}
+
+	xhci_dbg(xhci, "Output context after successful config ep cmd:\n");
+	xhci_dbg_ctx(xhci, virt_dev->out_ctx, virt_dev->out_ctx_dma,
+			LAST_CTX_TO_EP_NUM(virt_dev->in_ctx->slot.dev_info));
+
+	xhci_zero_in_ctx(virt_dev);
+	/* Free any old rings */
+	for (i = 1; i < 31; ++i) {
+		if (virt_dev->new_ep_rings[i]) {
+			xhci_ring_free(xhci, virt_dev->ep_rings[i]);
+			virt_dev->ep_rings[i] = virt_dev->new_ep_rings[i];
+			virt_dev->new_ep_rings[i] = NULL;
+		}
+	}
+
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	return ret;
+}
+
+void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	unsigned long flags;
+	struct xhci_hcd *xhci;
+	struct xhci_virt_device	*virt_dev;
+	int i, ret;
+
+	ret = xhci_check_args(hcd, udev, NULL, 0, __func__);
+	if (ret <= 0)
+		return;
+	xhci = hcd_to_xhci(hcd);
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!xhci->devs || !xhci->devs[udev->slot_id]) {
+		xhci_warn(xhci, "xHCI %s called with unaddressed device\n",
+				__func__);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return;
+	}
+	xhci_dbg(xhci, "%s called for udev %p\n", __func__, udev);
+	virt_dev = xhci->devs[udev->slot_id];
+	/* Free any rings allocated for added endpoints */
+	for (i = 0; i < 31; ++i) {
+		if (virt_dev->new_ep_rings[i]) {
+			xhci_ring_free(xhci, virt_dev->new_ep_rings[i]);
+			virt_dev->new_ep_rings[i] = NULL;
+		}
+	}
+	xhci_zero_in_ctx(virt_dev);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+}
+
+/*
+ * At this point, the struct usb_device is about to go away, the device has
+ * disconnected, and all traffic has been stopped and the endpoints have been
+ * disabled.  Free any HC data structures associated with that device.
+ */
+void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	unsigned long flags;
+
+	if (udev->slot_id == 0)
+		return;
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id)) {
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+		return;
+	}
+	xhci_ring_cmd_db(xhci);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	/*
+	 * Event command completion handler will free any data structures
+	 * associated with the slot
+	 */
+}
+
+/*
+ * Returns 0 if the xHC ran out of device slots, the Enable Slot command
+ * timed out, or allocating memory failed.  Returns 1 on success.
+ */
+int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	unsigned long flags;
+	int timeleft;
+	int ret;
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	ret = xhci_queue_slot_control(xhci, TRB_ENABLE_SLOT, 0);
+	if (ret) {
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+		return 0;
+	}
+	xhci_ring_cmd_db(xhci);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	/* XXX: how much time for xHC slot assignment? */
+	timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
+			USB_CTRL_SET_TIMEOUT);
+	if (timeleft <= 0) {
+		xhci_warn(xhci, "%s while waiting for a slot\n",
+				timeleft == 0 ? "Timeout" : "Signal");
+		/* FIXME cancel the enable slot request */
+		return 0;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	if (!xhci->slot_id) {
+		xhci_err(xhci, "Error while assigning device slot ID\n");
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return 0;
+	}
+	if (!xhci_alloc_virt_device(xhci, xhci->slot_id, udev, GFP_KERNEL)) {
+		/* Disable slot, if we can do it without mem alloc */
+		xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
+		if (!xhci_queue_slot_control(xhci, TRB_DISABLE_SLOT, udev->slot_id))
+			xhci_ring_cmd_db(xhci);
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return 0;
+	}
+	udev->slot_id = xhci->slot_id;
+	/* Is this a LS or FS device under a HS hub? */
+	/* Hub or peripherial? */
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return 1;
+}
+
+/*
+ * Issue an Address Device command (which will issue a SetAddress request to
+ * the device).
+ * We should be protected by the usb_address0_mutex in khubd's hub_port_init, so
+ * we should only issue and wait on one address command at the same time.
+ *
+ * We add one to the device address issued by the hardware because the USB core
+ * uses address 1 for the root hubs (even though they're not really devices).
+ */
+int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev)
+{
+	unsigned long flags;
+	int timeleft;
+	struct xhci_virt_device *virt_dev;
+	int ret = 0;
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	u32 temp;
+
+	if (!udev->slot_id) {
+		xhci_dbg(xhci, "Bad Slot ID %d\n", udev->slot_id);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	virt_dev = xhci->devs[udev->slot_id];
+
+	/* If this is a Set Address to an unconfigured device, setup ep 0 */
+	if (!udev->config)
+		xhci_setup_addressable_virt_dev(xhci, udev);
+	/* Otherwise, assume the core has the device configured how it wants */
+
+	ret = xhci_queue_address_device(xhci, virt_dev->in_ctx_dma,
+			udev->slot_id);
+	if (ret) {
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");
+		return ret;
+	}
+	xhci_ring_cmd_db(xhci);
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	/* ctrl tx can take up to 5 sec; XXX: need more time for xHC? */
+	timeleft = wait_for_completion_interruptible_timeout(&xhci->addr_dev,
+			USB_CTRL_SET_TIMEOUT);
+	/* FIXME: From section 4.3.4: "Software shall be responsible for timing
+	 * the SetAddress() "recovery interval" required by USB and aborting the
+	 * command on a timeout.
+	 */
+	if (timeleft <= 0) {
+		xhci_warn(xhci, "%s while waiting for a slot\n",
+				timeleft == 0 ? "Timeout" : "Signal");
+		/* FIXME cancel the address device command */
+		return -ETIME;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	switch (virt_dev->cmd_status) {
+	case COMP_CTX_STATE:
+	case COMP_EBADSLT:
+		xhci_err(xhci, "Setup ERROR: address device command for slot %d.\n",
+				udev->slot_id);
+		ret = -EINVAL;
+		break;
+	case COMP_TX_ERR:
+		dev_warn(&udev->dev, "Device not responding to set address.\n");
+		ret = -EPROTO;
+		break;
+	case COMP_SUCCESS:
+		xhci_dbg(xhci, "Successful Address Device command\n");
+		break;
+	default:
+		xhci_err(xhci, "ERROR: unexpected command completion "
+				"code 0x%x.\n", virt_dev->cmd_status);
+		ret = -EINVAL;
+		break;
+	}
+	if (ret) {
+		spin_unlock_irqrestore(&xhci->lock, flags);
+		return ret;
+	}
+	temp = xhci_readl(xhci, &xhci->op_regs->dcbaa_ptr[0]);
+	xhci_dbg(xhci, "Op regs DCBAA ptr[0] = %#08x\n", temp);
+	temp = xhci_readl(xhci, &xhci->op_regs->dcbaa_ptr[1]);
+	xhci_dbg(xhci, "Op regs DCBAA ptr[1] = %#08x\n", temp);
+	xhci_dbg(xhci, "Slot ID %d dcbaa entry[0] @%p = %#08x\n",
+			udev->slot_id,
+			&xhci->dcbaa->dev_context_ptrs[2*udev->slot_id],
+			xhci->dcbaa->dev_context_ptrs[2*udev->slot_id]);
+	xhci_dbg(xhci, "Slot ID %d dcbaa entry[1] @%p = %#08x\n",
+			udev->slot_id,
+			&xhci->dcbaa->dev_context_ptrs[2*udev->slot_id+1],
+			xhci->dcbaa->dev_context_ptrs[2*udev->slot_id+1]);
+	xhci_dbg(xhci, "Output Context DMA address = %#08llx\n",
+			(unsigned long long)virt_dev->out_ctx_dma);
+	xhci_dbg(xhci, "Slot ID %d Input Context:\n", udev->slot_id);
+	xhci_dbg_ctx(xhci, virt_dev->in_ctx, virt_dev->in_ctx_dma, 2);
+	xhci_dbg(xhci, "Slot ID %d Output Context:\n", udev->slot_id);
+	xhci_dbg_ctx(xhci, virt_dev->out_ctx, virt_dev->out_ctx_dma, 2);
+	/*
+	 * USB core uses address 1 for the roothubs, so we add one to the
+	 * address given back to us by the HC.
+	 */
+	udev->devnum = (virt_dev->out_ctx->slot.dev_state & DEV_ADDR_MASK) + 1;
+	/* Zero the input context control for later use */
+	virt_dev->in_ctx->add_flags = 0;
+	virt_dev->in_ctx->drop_flags = 0;
+	/* Mirror flags in the output context for future ep enable/disable */
+	virt_dev->out_ctx->add_flags = SLOT_FLAG | EP0_FLAG;
+	virt_dev->out_ctx->drop_flags = 0;
+	spin_unlock_irqrestore(&xhci->lock, flags);
+
+	xhci_dbg(xhci, "Device address = %d\n", udev->devnum);
+	/* XXX Meh, not sure if anyone else but choose_address uses this. */
+	set_bit(udev->devnum, udev->bus->devmap.devicemap);
+
+	return 0;
+}
+
+int xhci_get_frame(struct usb_hcd *hcd)
+{
+	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
+	/* EHCI mods by the periodic size.  Why? */
+	return xhci_readl(xhci, &xhci->run_regs->microframe_index) >> 3;
+}
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
+
+static int __init xhci_hcd_init(void)
+{
+#ifdef CONFIG_PCI
+	int retval = 0;
+
+	retval = xhci_register_pci();
+
+	if (retval < 0) {
+		printk(KERN_DEBUG "Problem registering PCI driver.");
+		return retval;
+	}
+#endif
+	return 0;
+}
+module_init(xhci_hcd_init);
+
+static void __exit xhci_hcd_cleanup(void)
+{
+#ifdef CONFIG_PCI
+	xhci_unregister_pci();
+#endif
+}
+module_exit(xhci_hcd_cleanup);
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
new file mode 100644
index 000000000000..eac5b53aa9e7
--- /dev/null
+++ b/drivers/usb/host/xhci-hub.c
@@ -0,0 +1,308 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <asm/unaligned.h>
+
+#include "xhci.h"
+
+static void xhci_hub_descriptor(struct xhci_hcd *xhci,
+		struct usb_hub_descriptor *desc)
+{
+	int ports;
+	u16 temp;
+
+	ports = HCS_MAX_PORTS(xhci->hcs_params1);
+
+	/* USB 3.0 hubs have a different descriptor, but we fake this for now */
+	desc->bDescriptorType = 0x29;
+	desc->bPwrOn2PwrGood = 10;	/* xhci section 5.4.9 says 20ms max */
+	desc->bHubContrCurrent = 0;
+
+	desc->bNbrPorts = ports;
+	temp = 1 + (ports / 8);
+	desc->bDescLength = 7 + 2 * temp;
+
+	/* Why does core/hcd.h define bitmap?  It's just confusing. */
+	memset(&desc->DeviceRemovable[0], 0, temp);
+	memset(&desc->DeviceRemovable[temp], 0xff, temp);
+
+	/* Ugh, these should be #defines, FIXME */
+	/* Using table 11-13 in USB 2.0 spec. */
+	temp = 0;
+	/* Bits 1:0 - support port power switching, or power always on */
+	if (HCC_PPC(xhci->hcc_params))
+		temp |= 0x0001;
+	else
+		temp |= 0x0002;
+	/* Bit  2 - root hubs are not part of a compound device */
+	/* Bits 4:3 - individual port over current protection */
+	temp |= 0x0008;
+	/* Bits 6:5 - no TTs in root ports */
+	/* Bit  7 - no port indicators */
+	desc->wHubCharacteristics = (__force __u16) cpu_to_le16(temp);
+}
+
+static unsigned int xhci_port_speed(unsigned int port_status)
+{
+	if (DEV_LOWSPEED(port_status))
+		return 1 << USB_PORT_FEAT_LOWSPEED;
+	if (DEV_HIGHSPEED(port_status))
+		return 1 << USB_PORT_FEAT_HIGHSPEED;
+	if (DEV_SUPERSPEED(port_status))
+		return 1 << USB_PORT_FEAT_SUPERSPEED;
+	/*
+	 * FIXME: Yes, we should check for full speed, but the core uses that as
+	 * a default in portspeed() in usb/core/hub.c (which is the only place
+	 * USB_PORT_FEAT_*SPEED is used).
+	 */
+	return 0;
+}
+
+/*
+ * These bits are Read Only (RO) and should be saved and written to the
+ * registers: 0, 3, 10:13, 30
+ * connect status, over-current status, port speed, and device removable.
+ * connect status and port speed are also sticky - meaning they're in
+ * the AUX well and they aren't changed by a hot, warm, or cold reset.
+ */
+#define	XHCI_PORT_RO	((1<<0) | (1<<3) | (0xf<<10) | (1<<30))
+/*
+ * These bits are RW; writing a 0 clears the bit, writing a 1 sets the bit:
+ * bits 5:8, 9, 14:15, 25:27
+ * link state, port power, port indicator state, "wake on" enable state
+ */
+#define XHCI_PORT_RWS	((0xf<<5) | (1<<9) | (0x3<<14) | (0x7<<25))
+/*
+ * These bits are RW; writing a 1 sets the bit, writing a 0 has no effect:
+ * bit 4 (port reset)
+ */
+#define	XHCI_PORT_RW1S	((1<<4))
+/*
+ * These bits are RW; writing a 1 clears the bit, writing a 0 has no effect:
+ * bits 1, 17, 18, 19, 20, 21, 22, 23
+ * port enable/disable, and
+ * change bits: connect, PED, warm port reset changed (reserved zero for USB 2.0 ports),
+ * over-current, reset, link state, and L1 change
+ */
+#define XHCI_PORT_RW1CS	((1<<1) | (0x7f<<17))
+/*
+ * Bit 16 is RW, and writing a '1' to it causes the link state control to be
+ * latched in
+ */
+#define	XHCI_PORT_RW	((1<<16))
+/*
+ * These bits are Reserved Zero (RsvdZ) and zero should be written to them:
+ * bits 2, 24, 28:31
+ */
+#define	XHCI_PORT_RZ	((1<<2) | (1<<24) | (0xf<<28))
+
+/*
+ * Given a port state, this function returns a value that would result in the
+ * port being in the same state, if the value was written to the port status
+ * control register.
+ * Save Read Only (RO) bits and save read/write bits where
+ * writing a 0 clears the bit and writing a 1 sets the bit (RWS).
+ * For all other types (RW1S, RW1CS, RW, and RZ), writing a '0' has no effect.
+ */
+static u32 xhci_port_state_to_neutral(u32 state)
+{
+	/* Save read-only status and port state */
+	return (state & XHCI_PORT_RO) | (state & XHCI_PORT_RWS);
+}
+
+int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
+		u16 wIndex, char *buf, u16 wLength)
+{
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int ports;
+	unsigned long flags;
+	u32 temp, status;
+	int retval = 0;
+	u32 __iomem *addr;
+	char *port_change_bit;
+
+	ports = HCS_MAX_PORTS(xhci->hcs_params1);
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	switch (typeReq) {
+	case GetHubStatus:
+		/* No power source, over-current reported per port */
+		memset(buf, 0, 4);
+		break;
+	case GetHubDescriptor:
+		xhci_hub_descriptor(xhci, (struct usb_hub_descriptor *) buf);
+		break;
+	case GetPortStatus:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+		status = 0;
+		addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff);
+		temp = xhci_readl(xhci, addr);
+		xhci_dbg(xhci, "get port status, actual port %d status  = 0x%x\n", wIndex, temp);
+
+		/* 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))
+			status |= 1 << USB_PORT_FEAT_C_OVER_CURRENT;
+		/*
+		 * FIXME ignoring suspend, reset, and USB 2.1/3.0 specific
+		 * changes
+		 */
+		if (temp & PORT_CONNECT) {
+			status |= 1 << USB_PORT_FEAT_CONNECTION;
+			status |= xhci_port_speed(temp);
+		}
+		if (temp & PORT_PE)
+			status |= 1 << USB_PORT_FEAT_ENABLE;
+		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;
+		xhci_dbg(xhci, "Get port status returned 0x%x\n", status);
+		put_unaligned(cpu_to_le32(status), (__le32 *) buf);
+		break;
+	case SetPortFeature:
+		wIndex &= 0xff;
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+		addr = &xhci->op_regs->port_status_base + NUM_PORT_REGS*(wIndex & 0xff);
+		temp = xhci_readl(xhci, addr);
+		temp = xhci_port_state_to_neutral(temp);
+		switch (wValue) {
+		case USB_PORT_FEAT_POWER:
+			/*
+			 * Turn on ports, even if there isn't per-port switching.
+			 * HC will report connect events even before this is set.
+			 * However, khubd will ignore the roothub events until
+			 * the roothub is registered.
+			 */
+			xhci_writel(xhci, temp | PORT_POWER, addr);
+
+			temp = xhci_readl(xhci, addr);
+			xhci_dbg(xhci, "set port power, actual port %d status  = 0x%x\n", wIndex, temp);
+			break;
+		case USB_PORT_FEAT_RESET:
+			temp = (temp | PORT_RESET);
+			xhci_writel(xhci, temp, addr);
+
+			temp = xhci_readl(xhci, addr);
+			xhci_dbg(xhci, "set port reset, actual port %d status  = 0x%x\n", wIndex, temp);
+			break;
+		default:
+			goto error;
+		}
+		temp = xhci_readl(xhci, addr); /* unblock any posted writes */
+		break;
+	case ClearPortFeature:
+		if (!wIndex || wIndex > ports)
+			goto error;
+		wIndex--;
+		addr = &xhci->op_regs->port_status_base +
+			NUM_PORT_REGS*(wIndex & 0xff);
+		temp = xhci_readl(xhci, addr);
+		temp = xhci_port_state_to_neutral(temp);
+		switch (wValue) {
+		case USB_PORT_FEAT_C_RESET:
+			status = PORT_RC;
+			port_change_bit = "reset";
+			break;
+		case USB_PORT_FEAT_C_CONNECTION:
+			status = PORT_CSC;
+			port_change_bit = "connect";
+			break;
+		case USB_PORT_FEAT_C_OVER_CURRENT:
+			status = PORT_OCC;
+			port_change_bit = "over-current";
+			break;
+		default:
+			goto error;
+		}
+		/* Change bits are all write 1 to clear */
+		xhci_writel(xhci, temp | status, addr);
+		temp = xhci_readl(xhci, addr);
+		xhci_dbg(xhci, "clear port %s change, actual port %d status  = 0x%x\n",
+				port_change_bit, wIndex, temp);
+		temp = xhci_readl(xhci, addr); /* unblock any posted writes */
+		break;
+	default:
+error:
+		/* "stall" on error */
+		retval = -EPIPE;
+	}
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return retval;
+}
+
+/*
+ * Returns 0 if the status hasn't changed, or the number of bytes in buf.
+ * Ports are 0-indexed from the HCD point of view,
+ * and 1-indexed from the USB core pointer of view.
+ * xHCI instances can have up to 127 ports, so FIXME if you see more than 15.
+ *
+ * Note that the status change bits will be cleared as soon as a port status
+ * change event is generated, so we use the saved status from that event.
+ */
+int xhci_hub_status_data(struct usb_hcd *hcd, char *buf)
+{
+	unsigned long flags;
+	u32 temp, status;
+	int i, retval;
+	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
+	int ports;
+	u32 __iomem *addr;
+
+	ports = HCS_MAX_PORTS(xhci->hcs_params1);
+
+	/* Initial status is no changes */
+	buf[0] = 0;
+	status = 0;
+	if (ports > 7) {
+		buf[1] = 0;
+		retval = 2;
+	} else {
+		retval = 1;
+	}
+
+	spin_lock_irqsave(&xhci->lock, flags);
+	/* For each port, did anything change?  If so, set that bit in buf. */
+	for (i = 0; i < ports; i++) {
+		addr = &xhci->op_regs->port_status_base +
+			NUM_PORT_REGS*i;
+		temp = xhci_readl(xhci, addr);
+		if (temp & (PORT_CSC | PORT_PEC | PORT_OCC)) {
+			if (i < 7)
+				buf[0] |= 1 << (i + 1);
+			else
+				buf[1] |= 1 << (i - 7);
+			status = 1;
+		}
+	}
+	spin_unlock_irqrestore(&xhci->lock, flags);
+	return status ? retval : 0;
+}
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
new file mode 100644
index 000000000000..37a83878a064
--- /dev/null
+++ b/drivers/usb/host/xhci-mem.c
@@ -0,0 +1,768 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/usb.h>
+#include <linux/pci.h>
+#include <linux/dmapool.h>
+
+#include "xhci.h"
+
+/*
+ * Allocates a generic ring segment from the ring pool, sets the dma address,
+ * initializes the segment to zero, and sets the private next pointer to NULL.
+ *
+ * Section 4.11.1.1:
+ * "All components of all Command and Transfer TRBs shall be initialized to '0'"
+ */
+static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, gfp_t flags)
+{
+	struct xhci_segment *seg;
+	dma_addr_t	dma;
+
+	seg = kzalloc(sizeof *seg, flags);
+	if (!seg)
+		return 0;
+	xhci_dbg(xhci, "Allocating priv segment structure at %p\n", seg);
+
+	seg->trbs = dma_pool_alloc(xhci->segment_pool, flags, &dma);
+	if (!seg->trbs) {
+		kfree(seg);
+		return 0;
+	}
+	xhci_dbg(xhci, "// Allocating segment at %p (virtual) 0x%llx (DMA)\n",
+			seg->trbs, (unsigned long long)dma);
+
+	memset(seg->trbs, 0, SEGMENT_SIZE);
+	seg->dma = dma;
+	seg->next = NULL;
+
+	return seg;
+}
+
+static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
+{
+	if (!seg)
+		return;
+	if (seg->trbs) {
+		xhci_dbg(xhci, "Freeing DMA segment at %p (virtual) 0x%llx (DMA)\n",
+				seg->trbs, (unsigned long long)seg->dma);
+		dma_pool_free(xhci->segment_pool, seg->trbs, seg->dma);
+		seg->trbs = NULL;
+	}
+	xhci_dbg(xhci, "Freeing priv segment structure at %p\n", seg);
+	kfree(seg);
+}
+
+/*
+ * Make the prev segment point to the next segment.
+ *
+ * Change the last TRB in the prev segment to be a Link TRB which points to the
+ * DMA address of the next segment.  The caller needs to set any Link TRB
+ * related flags, such as End TRB, Toggle Cycle, and no snoop.
+ */
+static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
+		struct xhci_segment *next, bool link_trbs)
+{
+	u32 val;
+
+	if (!prev || !next)
+		return;
+	prev->next = next;
+	if (link_trbs) {
+		prev->trbs[TRBS_PER_SEGMENT-1].link.segment_ptr[0] = next->dma;
+
+		/* Set the last TRB in the segment to have a TRB type ID of Link TRB */
+		val = prev->trbs[TRBS_PER_SEGMENT-1].link.control;
+		val &= ~TRB_TYPE_BITMASK;
+		val |= TRB_TYPE(TRB_LINK);
+		prev->trbs[TRBS_PER_SEGMENT-1].link.control = val;
+	}
+	xhci_dbg(xhci, "Linking segment 0x%llx to segment 0x%llx (DMA)\n",
+			(unsigned long long)prev->dma,
+			(unsigned long long)next->dma);
+}
+
+/* XXX: Do we need the hcd structure in all these functions? */
+void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
+{
+	struct xhci_segment *seg;
+	struct xhci_segment *first_seg;
+
+	if (!ring || !ring->first_seg)
+		return;
+	first_seg = ring->first_seg;
+	seg = first_seg->next;
+	xhci_dbg(xhci, "Freeing ring at %p\n", ring);
+	while (seg != first_seg) {
+		struct xhci_segment *next = seg->next;
+		xhci_segment_free(xhci, seg);
+		seg = next;
+	}
+	xhci_segment_free(xhci, first_seg);
+	ring->first_seg = NULL;
+	kfree(ring);
+}
+
+/**
+ * Create a new ring with zero or more segments.
+ *
+ * Link each segment together into a ring.
+ * Set the end flag and the cycle toggle bit on the last segment.
+ * See section 4.9.1 and figures 15 and 16.
+ */
+static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
+		unsigned int num_segs, bool link_trbs, gfp_t flags)
+{
+	struct xhci_ring	*ring;
+	struct xhci_segment	*prev;
+
+	ring = kzalloc(sizeof *(ring), flags);
+	xhci_dbg(xhci, "Allocating ring at %p\n", ring);
+	if (!ring)
+		return 0;
+
+	INIT_LIST_HEAD(&ring->td_list);
+	INIT_LIST_HEAD(&ring->cancelled_td_list);
+	if (num_segs == 0)
+		return ring;
+
+	ring->first_seg = xhci_segment_alloc(xhci, flags);
+	if (!ring->first_seg)
+		goto fail;
+	num_segs--;
+
+	prev = ring->first_seg;
+	while (num_segs > 0) {
+		struct xhci_segment	*next;
+
+		next = xhci_segment_alloc(xhci, flags);
+		if (!next)
+			goto fail;
+		xhci_link_segments(xhci, prev, next, link_trbs);
+
+		prev = next;
+		num_segs--;
+	}
+	xhci_link_segments(xhci, prev, ring->first_seg, link_trbs);
+
+	if (link_trbs) {
+		/* See section 4.9.2.1 and 6.4.4.1 */
+		prev->trbs[TRBS_PER_SEGMENT-1].link.control |= (LINK_TOGGLE);
+		xhci_dbg(xhci, "Wrote link toggle flag to"
+				" segment %p (virtual), 0x%llx (DMA)\n",
+				prev, (unsigned long long)prev->dma);
+	}
+	/* The ring is empty, so the enqueue pointer == dequeue pointer */
+	ring->enqueue = ring->first_seg->trbs;
+	ring->enq_seg = ring->first_seg;
+	ring->dequeue = ring->enqueue;
+	ring->deq_seg = ring->first_seg;
+	/* The ring is initialized to 0. The producer must write 1 to the cycle
+	 * bit to handover ownership of the TRB, so PCS = 1.  The consumer must
+	 * compare CCS to the cycle bit to check ownership, so CCS = 1.
+	 */
+	ring->cycle_state = 1;
+
+	return ring;
+
+fail:
+	xhci_ring_free(xhci, ring);
+	return 0;
+}
+
+/* All the xhci_tds in the ring's TD list should be freed at this point */
+void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id)
+{
+	struct xhci_virt_device *dev;
+	int i;
+
+	/* Slot ID 0 is reserved */
+	if (slot_id == 0 || !xhci->devs[slot_id])
+		return;
+
+	dev = xhci->devs[slot_id];
+	xhci->dcbaa->dev_context_ptrs[2*slot_id] = 0;
+	xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0;
+	if (!dev)
+		return;
+
+	for (i = 0; i < 31; ++i)
+		if (dev->ep_rings[i])
+			xhci_ring_free(xhci, dev->ep_rings[i]);
+
+	if (dev->in_ctx)
+		dma_pool_free(xhci->device_pool,
+				dev->in_ctx, dev->in_ctx_dma);
+	if (dev->out_ctx)
+		dma_pool_free(xhci->device_pool,
+				dev->out_ctx, dev->out_ctx_dma);
+	kfree(xhci->devs[slot_id]);
+	xhci->devs[slot_id] = 0;
+}
+
+int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id,
+		struct usb_device *udev, gfp_t flags)
+{
+	dma_addr_t	dma;
+	struct xhci_virt_device *dev;
+
+	/* Slot ID 0 is reserved */
+	if (slot_id == 0 || xhci->devs[slot_id]) {
+		xhci_warn(xhci, "Bad Slot ID %d\n", slot_id);
+		return 0;
+	}
+
+	xhci->devs[slot_id] = kzalloc(sizeof(*xhci->devs[slot_id]), flags);
+	if (!xhci->devs[slot_id])
+		return 0;
+	dev = xhci->devs[slot_id];
+
+	/* Allocate the (output) device context that will be used in the HC */
+	dev->out_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma);
+	if (!dev->out_ctx)
+		goto fail;
+	dev->out_ctx_dma = dma;
+	xhci_dbg(xhci, "Slot %d output ctx = 0x%llx (dma)\n", slot_id,
+			(unsigned long long)dma);
+	memset(dev->out_ctx, 0, sizeof(*dev->out_ctx));
+
+	/* Allocate the (input) device context for address device command */
+	dev->in_ctx = dma_pool_alloc(xhci->device_pool, flags, &dma);
+	if (!dev->in_ctx)
+		goto fail;
+	dev->in_ctx_dma = dma;
+	xhci_dbg(xhci, "Slot %d input ctx = 0x%llx (dma)\n", slot_id,
+			(unsigned long long)dma);
+	memset(dev->in_ctx, 0, sizeof(*dev->in_ctx));
+
+	/* Allocate endpoint 0 ring */
+	dev->ep_rings[0] = xhci_ring_alloc(xhci, 1, true, flags);
+	if (!dev->ep_rings[0])
+		goto fail;
+
+	init_completion(&dev->cmd_completion);
+
+	/*
+	 * Point to output device context in dcbaa; skip the output control
+	 * context, which is eight 32 bit fields (or 32 bytes long)
+	 */
+	xhci->dcbaa->dev_context_ptrs[2*slot_id] =
+		(u32) dev->out_ctx_dma + (32);
+	xhci_dbg(xhci, "Set slot id %d dcbaa entry %p to 0x%llx\n",
+			slot_id,
+			&xhci->dcbaa->dev_context_ptrs[2*slot_id],
+			(unsigned long long)dev->out_ctx_dma);
+	xhci->dcbaa->dev_context_ptrs[2*slot_id + 1] = 0;
+
+	return 1;
+fail:
+	xhci_free_virt_device(xhci, slot_id);
+	return 0;
+}
+
+/* Setup an xHCI virtual device for a Set Address command */
+int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev)
+{
+	struct xhci_virt_device *dev;
+	struct xhci_ep_ctx	*ep0_ctx;
+	struct usb_device	*top_dev;
+
+	dev = xhci->devs[udev->slot_id];
+	/* Slot ID 0 is reserved */
+	if (udev->slot_id == 0 || !dev) {
+		xhci_warn(xhci, "Slot ID %d is not assigned to this device\n",
+				udev->slot_id);
+		return -EINVAL;
+	}
+	ep0_ctx = &dev->in_ctx->ep[0];
+
+	/* 2) New slot context and endpoint 0 context are valid*/
+	dev->in_ctx->add_flags = SLOT_FLAG | EP0_FLAG;
+
+	/* 3) Only the control endpoint is valid - one endpoint context */
+	dev->in_ctx->slot.dev_info |= LAST_CTX(1);
+
+	switch (udev->speed) {
+	case USB_SPEED_SUPER:
+		dev->in_ctx->slot.dev_info |= (u32) udev->route;
+		dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_SS;
+		break;
+	case USB_SPEED_HIGH:
+		dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_HS;
+		break;
+	case USB_SPEED_FULL:
+		dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_FS;
+		break;
+	case USB_SPEED_LOW:
+		dev->in_ctx->slot.dev_info |= (u32) SLOT_SPEED_LS;
+		break;
+	case USB_SPEED_VARIABLE:
+		xhci_dbg(xhci, "FIXME xHCI doesn't support wireless speeds\n");
+		return -EINVAL;
+		break;
+	default:
+		/* Speed was set earlier, this shouldn't happen. */
+		BUG();
+	}
+	/* Find the root hub port this device is under */
+	for (top_dev = udev; top_dev->parent && top_dev->parent->parent;
+			top_dev = top_dev->parent)
+		/* Found device below root hub */;
+	dev->in_ctx->slot.dev_info2 |= (u32) ROOT_HUB_PORT(top_dev->portnum);
+	xhci_dbg(xhci, "Set root hub portnum to %d\n", top_dev->portnum);
+
+	/* Is this a LS/FS device under a HS hub? */
+	/*
+	 * FIXME: I don't think this is right, where does the TT info for the
+	 * roothub or parent hub come from?
+	 */
+	if ((udev->speed == USB_SPEED_LOW || udev->speed == USB_SPEED_FULL) &&
+			udev->tt) {
+		dev->in_ctx->slot.tt_info = udev->tt->hub->slot_id;
+		dev->in_ctx->slot.tt_info |= udev->ttport << 8;
+	}
+	xhci_dbg(xhci, "udev->tt = %p\n", udev->tt);
+	xhci_dbg(xhci, "udev->ttport = 0x%x\n", udev->ttport);
+
+	/* Step 4 - ring already allocated */
+	/* Step 5 */
+	ep0_ctx->ep_info2 = EP_TYPE(CTRL_EP);
+	/*
+	 * See section 4.3 bullet 6:
+	 * The default Max Packet size for ep0 is "8 bytes for a USB2
+	 * LS/FS/HS device or 512 bytes for a USB3 SS device"
+	 * XXX: Not sure about wireless USB devices.
+	 */
+	if (udev->speed == USB_SPEED_SUPER)
+		ep0_ctx->ep_info2 |= MAX_PACKET(512);
+	else
+		ep0_ctx->ep_info2 |= MAX_PACKET(8);
+	/* EP 0 can handle "burst" sizes of 1, so Max Burst Size field is 0 */
+	ep0_ctx->ep_info2 |= MAX_BURST(0);
+	ep0_ctx->ep_info2 |= ERROR_COUNT(3);
+
+	ep0_ctx->deq[0] =
+		dev->ep_rings[0]->first_seg->dma;
+	ep0_ctx->deq[0] |= dev->ep_rings[0]->cycle_state;
+	ep0_ctx->deq[1] = 0;
+
+	/* Steps 7 and 8 were done in xhci_alloc_virt_device() */
+
+	return 0;
+}
+
+/* Return the polling or NAK interval.
+ *
+ * The polling interval is expressed in "microframes".  If xHCI's Interval field
+ * is set to N, it will service the endpoint every 2^(Interval)*125us.
+ *
+ * The NAK interval is one NAK per 1 to 255 microframes, or no NAKs if interval
+ * is set to 0.
+ */
+static inline unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
+		struct usb_host_endpoint *ep)
+{
+	unsigned int interval = 0;
+
+	switch (udev->speed) {
+	case USB_SPEED_HIGH:
+		/* Max NAK rate */
+		if (usb_endpoint_xfer_control(&ep->desc) ||
+				usb_endpoint_xfer_bulk(&ep->desc))
+			interval = ep->desc.bInterval;
+		/* Fall through - SS and HS isoc/int have same decoding */
+	case USB_SPEED_SUPER:
+		if (usb_endpoint_xfer_int(&ep->desc) ||
+				usb_endpoint_xfer_isoc(&ep->desc)) {
+			if (ep->desc.bInterval == 0)
+				interval = 0;
+			else
+				interval = ep->desc.bInterval - 1;
+			if (interval > 15)
+				interval = 15;
+			if (interval != ep->desc.bInterval + 1)
+				dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n",
+						ep->desc.bEndpointAddress, 1 << interval);
+		}
+		break;
+	/* Convert bInterval (in 1-255 frames) to microframes and round down to
+	 * nearest power of 2.
+	 */
+	case USB_SPEED_FULL:
+	case USB_SPEED_LOW:
+		if (usb_endpoint_xfer_int(&ep->desc) ||
+				usb_endpoint_xfer_isoc(&ep->desc)) {
+			interval = fls(8*ep->desc.bInterval) - 1;
+			if (interval > 10)
+				interval = 10;
+			if (interval < 3)
+				interval = 3;
+			if ((1 << interval) != 8*ep->desc.bInterval)
+				dev_warn(&udev->dev, "ep %#x - rounding interval to %d microframes\n",
+						ep->desc.bEndpointAddress, 1 << interval);
+		}
+		break;
+	default:
+		BUG();
+	}
+	return EP_INTERVAL(interval);
+}
+
+static inline u32 xhci_get_endpoint_type(struct usb_device *udev,
+		struct usb_host_endpoint *ep)
+{
+	int in;
+	u32 type;
+
+	in = usb_endpoint_dir_in(&ep->desc);
+	if (usb_endpoint_xfer_control(&ep->desc)) {
+		type = EP_TYPE(CTRL_EP);
+	} else if (usb_endpoint_xfer_bulk(&ep->desc)) {
+		if (in)
+			type = EP_TYPE(BULK_IN_EP);
+		else
+			type = EP_TYPE(BULK_OUT_EP);
+	} else if (usb_endpoint_xfer_isoc(&ep->desc)) {
+		if (in)
+			type = EP_TYPE(ISOC_IN_EP);
+		else
+			type = EP_TYPE(ISOC_OUT_EP);
+	} else if (usb_endpoint_xfer_int(&ep->desc)) {
+		if (in)
+			type = EP_TYPE(INT_IN_EP);
+		else
+			type = EP_TYPE(INT_OUT_EP);
+	} else {
+		BUG();
+	}
+	return type;
+}
+
+int xhci_endpoint_init(struct xhci_hcd *xhci,
+		struct xhci_virt_device *virt_dev,
+		struct usb_device *udev,
+		struct usb_host_endpoint *ep)
+{
+	unsigned int ep_index;
+	struct xhci_ep_ctx *ep_ctx;
+	struct xhci_ring *ep_ring;
+	unsigned int max_packet;
+	unsigned int max_burst;
+
+	ep_index = xhci_get_endpoint_index(&ep->desc);
+	ep_ctx = &virt_dev->in_ctx->ep[ep_index];
+
+	/* Set up the endpoint ring */
+	virt_dev->new_ep_rings[ep_index] = xhci_ring_alloc(xhci, 1, true, GFP_KERNEL);
+	if (!virt_dev->new_ep_rings[ep_index])
+		return -ENOMEM;
+	ep_ring = virt_dev->new_ep_rings[ep_index];
+	ep_ctx->deq[0] = ep_ring->first_seg->dma | ep_ring->cycle_state;
+	ep_ctx->deq[1] = 0;
+
+	ep_ctx->ep_info = xhci_get_endpoint_interval(udev, ep);
+
+	/* FIXME dig Mult and streams info out of ep companion desc */
+
+	/* Allow 3 retries for everything but isoc */
+	if (!usb_endpoint_xfer_isoc(&ep->desc))
+		ep_ctx->ep_info2 = ERROR_COUNT(3);
+	else
+		ep_ctx->ep_info2 = ERROR_COUNT(0);
+
+	ep_ctx->ep_info2 |= xhci_get_endpoint_type(udev, ep);
+
+	/* Set the max packet size and max burst */
+	switch (udev->speed) {
+	case USB_SPEED_SUPER:
+		max_packet = ep->desc.wMaxPacketSize;
+		ep_ctx->ep_info2 |= MAX_PACKET(max_packet);
+		/* dig out max burst from ep companion desc */
+		max_packet = ep->ss_ep_comp->desc.bMaxBurst;
+		ep_ctx->ep_info2 |= MAX_BURST(max_packet);
+		break;
+	case USB_SPEED_HIGH:
+		/* bits 11:12 specify the number of additional transaction
+		 * opportunities per microframe (USB 2.0, section 9.6.6)
+		 */
+		if (usb_endpoint_xfer_isoc(&ep->desc) ||
+				usb_endpoint_xfer_int(&ep->desc)) {
+			max_burst = (ep->desc.wMaxPacketSize & 0x1800) >> 11;
+			ep_ctx->ep_info2 |= MAX_BURST(max_burst);
+		}
+		/* Fall through */
+	case USB_SPEED_FULL:
+	case USB_SPEED_LOW:
+		max_packet = ep->desc.wMaxPacketSize & 0x3ff;
+		ep_ctx->ep_info2 |= MAX_PACKET(max_packet);
+		break;
+	default:
+		BUG();
+	}
+	/* FIXME Debug endpoint context */
+	return 0;
+}
+
+void xhci_endpoint_zero(struct xhci_hcd *xhci,
+		struct xhci_virt_device *virt_dev,
+		struct usb_host_endpoint *ep)
+{
+	unsigned int ep_index;
+	struct xhci_ep_ctx *ep_ctx;
+
+	ep_index = xhci_get_endpoint_index(&ep->desc);
+	ep_ctx = &virt_dev->in_ctx->ep[ep_index];
+
+	ep_ctx->ep_info = 0;
+	ep_ctx->ep_info2 = 0;
+	ep_ctx->deq[0] = 0;
+	ep_ctx->deq[1] = 0;
+	ep_ctx->tx_info = 0;
+	/* Don't free the endpoint ring until the set interface or configuration
+	 * request succeeds.
+	 */
+}
+
+void xhci_mem_cleanup(struct xhci_hcd *xhci)
+{
+	struct pci_dev	*pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
+	int size;
+	int i;
+
+	/* Free the Event Ring Segment Table and the actual Event Ring */
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_size);
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_base[0]);
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_base[1]);
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_dequeue[0]);
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_dequeue[1]);
+	size = sizeof(struct xhci_erst_entry)*(xhci->erst.num_entries);
+	if (xhci->erst.entries)
+		pci_free_consistent(pdev, size,
+				xhci->erst.entries, xhci->erst.erst_dma_addr);
+	xhci->erst.entries = NULL;
+	xhci_dbg(xhci, "Freed ERST\n");
+	if (xhci->event_ring)
+		xhci_ring_free(xhci, xhci->event_ring);
+	xhci->event_ring = NULL;
+	xhci_dbg(xhci, "Freed event ring\n");
+
+	xhci_writel(xhci, 0, &xhci->op_regs->cmd_ring[0]);
+	xhci_writel(xhci, 0, &xhci->op_regs->cmd_ring[1]);
+	if (xhci->cmd_ring)
+		xhci_ring_free(xhci, xhci->cmd_ring);
+	xhci->cmd_ring = NULL;
+	xhci_dbg(xhci, "Freed command ring\n");
+
+	for (i = 1; i < MAX_HC_SLOTS; ++i)
+		xhci_free_virt_device(xhci, i);
+
+	if (xhci->segment_pool)
+		dma_pool_destroy(xhci->segment_pool);
+	xhci->segment_pool = NULL;
+	xhci_dbg(xhci, "Freed segment pool\n");
+
+	if (xhci->device_pool)
+		dma_pool_destroy(xhci->device_pool);
+	xhci->device_pool = NULL;
+	xhci_dbg(xhci, "Freed device context pool\n");
+
+	xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[0]);
+	xhci_writel(xhci, 0, &xhci->op_regs->dcbaa_ptr[1]);
+	if (xhci->dcbaa)
+		pci_free_consistent(pdev, sizeof(*xhci->dcbaa),
+				xhci->dcbaa, xhci->dcbaa->dma);
+	xhci->dcbaa = NULL;
+
+	xhci->page_size = 0;
+	xhci->page_shift = 0;
+}
+
+int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags)
+{
+	dma_addr_t	dma;
+	struct device	*dev = xhci_to_hcd(xhci)->self.controller;
+	unsigned int	val, val2;
+	struct xhci_segment	*seg;
+	u32 page_size;
+	int i;
+
+	page_size = xhci_readl(xhci, &xhci->op_regs->page_size);
+	xhci_dbg(xhci, "Supported page size register = 0x%x\n", page_size);
+	for (i = 0; i < 16; i++) {
+		if ((0x1 & page_size) != 0)
+			break;
+		page_size = page_size >> 1;
+	}
+	if (i < 16)
+		xhci_dbg(xhci, "Supported page size of %iK\n", (1 << (i+12)) / 1024);
+	else
+		xhci_warn(xhci, "WARN: no supported page size\n");
+	/* Use 4K pages, since that's common and the minimum the HC supports */
+	xhci->page_shift = 12;
+	xhci->page_size = 1 << xhci->page_shift;
+	xhci_dbg(xhci, "HCD page size set to %iK\n", xhci->page_size / 1024);
+
+	/*
+	 * Program the Number of Device Slots Enabled field in the CONFIG
+	 * register with the max value of slots the HC can handle.
+	 */
+	val = HCS_MAX_SLOTS(xhci_readl(xhci, &xhci->cap_regs->hcs_params1));
+	xhci_dbg(xhci, "// xHC can handle at most %d device slots.\n",
+			(unsigned int) val);
+	val2 = xhci_readl(xhci, &xhci->op_regs->config_reg);
+	val |= (val2 & ~HCS_SLOTS_MASK);
+	xhci_dbg(xhci, "// Setting Max device slots reg = 0x%x.\n",
+			(unsigned int) val);
+	xhci_writel(xhci, val, &xhci->op_regs->config_reg);
+
+	/*
+	 * Section 5.4.8 - doorbell array must be
+	 * "physically contiguous and 64-byte (cache line) aligned".
+	 */
+	xhci->dcbaa = pci_alloc_consistent(to_pci_dev(dev),
+			sizeof(*xhci->dcbaa), &dma);
+	if (!xhci->dcbaa)
+		goto fail;
+	memset(xhci->dcbaa, 0, sizeof *(xhci->dcbaa));
+	xhci->dcbaa->dma = dma;
+	xhci_dbg(xhci, "// Device context base array address = 0x%llx (DMA), %p (virt)\n",
+			(unsigned long long)xhci->dcbaa->dma, xhci->dcbaa);
+	xhci_writel(xhci, dma, &xhci->op_regs->dcbaa_ptr[0]);
+	xhci_writel(xhci, (u32) 0, &xhci->op_regs->dcbaa_ptr[1]);
+
+	/*
+	 * Initialize the ring segment pool.  The ring must be a contiguous
+	 * structure comprised of TRBs.  The TRBs must be 16 byte aligned,
+	 * however, the command ring segment needs 64-byte aligned segments,
+	 * so we pick the greater alignment need.
+	 */
+	xhci->segment_pool = dma_pool_create("xHCI ring segments", dev,
+			SEGMENT_SIZE, 64, xhci->page_size);
+	/* See Table 46 and Note on Figure 55 */
+	/* FIXME support 64-byte contexts */
+	xhci->device_pool = dma_pool_create("xHCI input/output contexts", dev,
+			sizeof(struct xhci_device_control),
+			64, xhci->page_size);
+	if (!xhci->segment_pool || !xhci->device_pool)
+		goto fail;
+
+	/* Set up the command ring to have one segments for now. */
+	xhci->cmd_ring = xhci_ring_alloc(xhci, 1, true, flags);
+	if (!xhci->cmd_ring)
+		goto fail;
+	xhci_dbg(xhci, "Allocated command ring at %p\n", xhci->cmd_ring);
+	xhci_dbg(xhci, "First segment DMA is 0x%llx\n",
+			(unsigned long long)xhci->cmd_ring->first_seg->dma);
+
+	/* Set the address in the Command Ring Control register */
+	val = xhci_readl(xhci, &xhci->op_regs->cmd_ring[0]);
+	val = (val & ~CMD_RING_ADDR_MASK) |
+		(xhci->cmd_ring->first_seg->dma & CMD_RING_ADDR_MASK) |
+		xhci->cmd_ring->cycle_state;
+	xhci_dbg(xhci, "// Setting command ring address low bits to 0x%x\n", val);
+	xhci_writel(xhci, val, &xhci->op_regs->cmd_ring[0]);
+	xhci_dbg(xhci, "// Setting command ring address high bits to 0x0\n");
+	xhci_writel(xhci, (u32) 0, &xhci->op_regs->cmd_ring[1]);
+	xhci_dbg_cmd_ptrs(xhci);
+
+	val = xhci_readl(xhci, &xhci->cap_regs->db_off);
+	val &= DBOFF_MASK;
+	xhci_dbg(xhci, "// Doorbell array is located at offset 0x%x"
+			" from cap regs base addr\n", val);
+	xhci->dba = (void *) xhci->cap_regs + val;
+	xhci_dbg_regs(xhci);
+	xhci_print_run_regs(xhci);
+	/* Set ir_set to interrupt register set 0 */
+	xhci->ir_set = (void *) xhci->run_regs->ir_set;
+
+	/*
+	 * Event ring setup: Allocate a normal ring, but also setup
+	 * the event ring segment table (ERST).  Section 4.9.3.
+	 */
+	xhci_dbg(xhci, "// Allocating event ring\n");
+	xhci->event_ring = xhci_ring_alloc(xhci, ERST_NUM_SEGS, false, flags);
+	if (!xhci->event_ring)
+		goto fail;
+
+	xhci->erst.entries = pci_alloc_consistent(to_pci_dev(dev),
+			sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS, &dma);
+	if (!xhci->erst.entries)
+		goto fail;
+	xhci_dbg(xhci, "// Allocated event ring segment table at 0x%llx\n",
+			(unsigned long long)dma);
+
+	memset(xhci->erst.entries, 0, sizeof(struct xhci_erst_entry)*ERST_NUM_SEGS);
+	xhci->erst.num_entries = ERST_NUM_SEGS;
+	xhci->erst.erst_dma_addr = dma;
+	xhci_dbg(xhci, "Set ERST to 0; private num segs = %i, virt addr = %p, dma addr = 0x%llx\n",
+			xhci->erst.num_entries,
+			xhci->erst.entries,
+			(unsigned long long)xhci->erst.erst_dma_addr);
+
+	/* set ring base address and size for each segment table entry */
+	for (val = 0, seg = xhci->event_ring->first_seg; val < ERST_NUM_SEGS; val++) {
+		struct xhci_erst_entry *entry = &xhci->erst.entries[val];
+		entry->seg_addr[0] = seg->dma;
+		entry->seg_addr[1] = 0;
+		entry->seg_size = TRBS_PER_SEGMENT;
+		entry->rsvd = 0;
+		seg = seg->next;
+	}
+
+	/* set ERST count with the number of entries in the segment table */
+	val = xhci_readl(xhci, &xhci->ir_set->erst_size);
+	val &= ERST_SIZE_MASK;
+	val |= ERST_NUM_SEGS;
+	xhci_dbg(xhci, "// Write ERST size = %i to ir_set 0 (some bits preserved)\n",
+			val);
+	xhci_writel(xhci, val, &xhci->ir_set->erst_size);
+
+	xhci_dbg(xhci, "// Set ERST entries to point to event ring.\n");
+	/* set the segment table base address */
+	xhci_dbg(xhci, "// Set ERST base address for ir_set 0 = 0x%llx\n",
+			(unsigned long long)xhci->erst.erst_dma_addr);
+	val = xhci_readl(xhci, &xhci->ir_set->erst_base[0]);
+	val &= ERST_PTR_MASK;
+	val |= (xhci->erst.erst_dma_addr & ~ERST_PTR_MASK);
+	xhci_writel(xhci, val, &xhci->ir_set->erst_base[0]);
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_base[1]);
+
+	/* Set the event ring dequeue address */
+	xhci_set_hc_event_deq(xhci);
+	xhci_dbg(xhci, "Wrote ERST address to ir_set 0.\n");
+	xhci_print_ir_set(xhci, xhci->ir_set, 0);
+
+	/*
+	 * XXX: Might need to set the Interrupter Moderation Register to
+	 * something other than the default (~1ms minimum between interrupts).
+	 * See section 5.5.1.2.
+	 */
+	init_completion(&xhci->addr_dev);
+	for (i = 0; i < MAX_HC_SLOTS; ++i)
+		xhci->devs[i] = 0;
+
+	return 0;
+fail:
+	xhci_warn(xhci, "Couldn't initialize memory\n");
+	xhci_mem_cleanup(xhci);
+	return -ENOMEM;
+}
diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
new file mode 100644
index 000000000000..1462709e26c0
--- /dev/null
+++ b/drivers/usb/host/xhci-pci.c
@@ -0,0 +1,166 @@
+/*
+ * xHCI host controller driver PCI Bus Glue.
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/pci.h>
+
+#include "xhci.h"
+
+static const char hcd_name[] = "xhci_hcd";
+
+/* called after powerup, by probe or system-pm "wakeup" */
+static int xhci_pci_reinit(struct xhci_hcd *xhci, struct pci_dev *pdev)
+{
+	/*
+	 * TODO: Implement finding debug ports later.
+	 * TODO: see if there are any quirks that need to be added to handle
+	 * new extended capabilities.
+	 */
+
+	/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
+	if (!pci_set_mwi(pdev))
+		xhci_dbg(xhci, "MWI active\n");
+
+	xhci_dbg(xhci, "Finished xhci_pci_reinit\n");
+	return 0;
+}
+
+/* called during probe() after chip reset completes */
+static int xhci_pci_setup(struct usb_hcd *hcd)
+{
+	struct xhci_hcd		*xhci = hcd_to_xhci(hcd);
+	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
+	int			retval;
+
+	xhci->cap_regs = hcd->regs;
+	xhci->op_regs = hcd->regs +
+		HC_LENGTH(xhci_readl(xhci, &xhci->cap_regs->hc_capbase));
+	xhci->run_regs = hcd->regs +
+		(xhci_readl(xhci, &xhci->cap_regs->run_regs_off) & RTSOFF_MASK);
+	/* Cache read-only capability registers */
+	xhci->hcs_params1 = xhci_readl(xhci, &xhci->cap_regs->hcs_params1);
+	xhci->hcs_params2 = xhci_readl(xhci, &xhci->cap_regs->hcs_params2);
+	xhci->hcs_params3 = xhci_readl(xhci, &xhci->cap_regs->hcs_params3);
+	xhci->hcc_params = xhci_readl(xhci, &xhci->cap_regs->hcc_params);
+	xhci_print_registers(xhci);
+
+	/* Make sure the HC is halted. */
+	retval = xhci_halt(xhci);
+	if (retval)
+		return retval;
+
+	xhci_dbg(xhci, "Resetting HCD\n");
+	/* Reset the internal HC memory state and registers. */
+	retval = xhci_reset(xhci);
+	if (retval)
+		return retval;
+	xhci_dbg(xhci, "Reset complete\n");
+
+	xhci_dbg(xhci, "Calling HCD init\n");
+	/* Initialize HCD and host controller data structures. */
+	retval = xhci_init(hcd);
+	if (retval)
+		return retval;
+	xhci_dbg(xhci, "Called HCD init\n");
+
+	pci_read_config_byte(pdev, XHCI_SBRN_OFFSET, &xhci->sbrn);
+	xhci_dbg(xhci, "Got SBRN %u\n", (unsigned int) xhci->sbrn);
+
+	/* Find any debug ports */
+	return xhci_pci_reinit(xhci, pdev);
+}
+
+static const struct hc_driver xhci_pci_hc_driver = {
+	.description =		hcd_name,
+	.product_desc =		"xHCI Host Controller",
+	.hcd_priv_size =	sizeof(struct xhci_hcd),
+
+	/*
+	 * generic hardware linkage
+	 */
+	.irq =			xhci_irq,
+	.flags =		HCD_MEMORY | HCD_USB3,
+
+	/*
+	 * basic lifecycle operations
+	 */
+	.reset =		xhci_pci_setup,
+	.start =		xhci_run,
+	/* suspend and resume implemented later */
+	.stop =			xhci_stop,
+	.shutdown =		xhci_shutdown,
+
+	/*
+	 * managing i/o requests and associated device resources
+	 */
+	.urb_enqueue =		xhci_urb_enqueue,
+	.urb_dequeue =		xhci_urb_dequeue,
+	.alloc_dev =		xhci_alloc_dev,
+	.free_dev =		xhci_free_dev,
+	.add_endpoint =		xhci_add_endpoint,
+	.drop_endpoint =	xhci_drop_endpoint,
+	.check_bandwidth =	xhci_check_bandwidth,
+	.reset_bandwidth =	xhci_reset_bandwidth,
+	.address_device =	xhci_address_device,
+
+	/*
+	 * scheduling support
+	 */
+	.get_frame_number =	xhci_get_frame,
+
+	/* Root hub support */
+	.hub_control =		xhci_hub_control,
+	.hub_status_data =	xhci_hub_status_data,
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* PCI driver selection metadata; PCI hotplugging uses this */
+static const struct pci_device_id pci_ids[] = { {
+	/* handle any USB 3.0 xHCI controller */
+	PCI_DEVICE_CLASS(PCI_CLASS_SERIAL_USB_XHCI, ~0),
+	.driver_data =	(unsigned long) &xhci_pci_hc_driver,
+	},
+	{ /* end: all zeroes */ }
+};
+MODULE_DEVICE_TABLE(pci, pci_ids);
+
+/* pci driver glue; this is a "new style" PCI driver module */
+static struct pci_driver xhci_pci_driver = {
+	.name =		(char *) hcd_name,
+	.id_table =	pci_ids,
+
+	.probe =	usb_hcd_pci_probe,
+	.remove =	usb_hcd_pci_remove,
+	/* suspend and resume implemented later */
+
+	.shutdown = 	usb_hcd_pci_shutdown,
+};
+
+int xhci_register_pci()
+{
+	return pci_register_driver(&xhci_pci_driver);
+}
+
+void xhci_unregister_pci()
+{
+	pci_unregister_driver(&xhci_pci_driver);
+}
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
new file mode 100644
index 000000000000..d42a738cdaa7
--- /dev/null
+++ b/drivers/usb/host/xhci-ring.c
@@ -0,0 +1,1649 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/*
+ * Ring initialization rules:
+ * 1. Each segment is initialized to zero, except for link TRBs.
+ * 2. Ring cycle state = 0.  This represents Producer Cycle State (PCS) or
+ *    Consumer Cycle State (CCS), depending on ring function.
+ * 3. Enqueue pointer = dequeue pointer = address of first TRB in the segment.
+ *
+ * Ring behavior rules:
+ * 1. A ring is empty if enqueue == dequeue.  This means there will always be at
+ *    least one free TRB in the ring.  This is useful if you want to turn that
+ *    into a link TRB and expand the ring.
+ * 2. When incrementing an enqueue or dequeue pointer, if the next TRB is a
+ *    link TRB, then load the pointer with the address in the link TRB.  If the
+ *    link TRB had its toggle bit set, you may need to update the ring cycle
+ *    state (see cycle bit rules).  You may have to do this multiple times
+ *    until you reach a non-link TRB.
+ * 3. A ring is full if enqueue++ (for the definition of increment above)
+ *    equals the dequeue pointer.
+ *
+ * Cycle bit rules:
+ * 1. When a consumer increments a dequeue pointer and encounters a toggle bit
+ *    in a link TRB, it must toggle the ring cycle state.
+ * 2. When a producer increments an enqueue pointer and encounters a toggle bit
+ *    in a link TRB, it must toggle the ring cycle state.
+ *
+ * Producer rules:
+ * 1. Check if ring is full before you enqueue.
+ * 2. Write the ring cycle state to the cycle bit in the TRB you're enqueuing.
+ *    Update enqueue pointer between each write (which may update the ring
+ *    cycle state).
+ * 3. Notify consumer.  If SW is producer, it rings the doorbell for command
+ *    and endpoint rings.  If HC is the producer for the event ring,
+ *    and it generates an interrupt according to interrupt modulation rules.
+ *
+ * Consumer rules:
+ * 1. Check if TRB belongs to you.  If the cycle bit == your ring cycle state,
+ *    the TRB is owned by the consumer.
+ * 2. Update dequeue pointer (which may update the ring cycle state) and
+ *    continue processing TRBs until you reach a TRB which is not owned by you.
+ * 3. Notify the producer.  SW is the consumer for the event ring, and it
+ *   updates event ring dequeue pointer.  HC is the consumer for the command and
+ *   endpoint rings; it generates events on the event ring for these.
+ */
+
+#include <linux/scatterlist.h>
+#include "xhci.h"
+
+/*
+ * Returns zero if the TRB isn't in this segment, otherwise it returns the DMA
+ * address of the TRB.
+ */
+dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg,
+		union xhci_trb *trb)
+{
+	dma_addr_t offset;
+
+	if (!seg || !trb || (void *) trb < (void *) seg->trbs)
+		return 0;
+	/* offset in bytes, since these are byte-addressable */
+	offset = trb - seg->trbs;
+	/* SEGMENT_SIZE in bytes, trbs are 16-byte aligned */
+	if (offset > SEGMENT_SIZE || (offset % sizeof(*trb)) != 0)
+		return 0;
+	return seg->dma + offset;
+}
+
+/* Does this link TRB point to the first segment in a ring,
+ * or was the previous TRB the last TRB on the last segment in the ERST?
+ */
+static inline bool last_trb_on_last_seg(struct xhci_hcd *xhci, struct xhci_ring *ring,
+		struct xhci_segment *seg, union xhci_trb *trb)
+{
+	if (ring == xhci->event_ring)
+		return (trb == &seg->trbs[TRBS_PER_SEGMENT]) &&
+			(seg->next == xhci->event_ring->first_seg);
+	else
+		return trb->link.control & LINK_TOGGLE;
+}
+
+/* Is this TRB a link TRB or was the last TRB the last TRB in this event ring
+ * segment?  I.e. would the updated event TRB pointer step off the end of the
+ * event seg?
+ */
+static inline int last_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
+		struct xhci_segment *seg, union xhci_trb *trb)
+{
+	if (ring == xhci->event_ring)
+		return trb == &seg->trbs[TRBS_PER_SEGMENT];
+	else
+		return (trb->link.control & TRB_TYPE_BITMASK) == TRB_TYPE(TRB_LINK);
+}
+
+/* Updates trb to point to the next TRB in the ring, and updates seg if the next
+ * TRB is in a new segment.  This does not skip over link TRBs, and it does not
+ * effect the ring dequeue or enqueue pointers.
+ */
+static void next_trb(struct xhci_hcd *xhci,
+		struct xhci_ring *ring,
+		struct xhci_segment **seg,
+		union xhci_trb **trb)
+{
+	if (last_trb(xhci, ring, *seg, *trb)) {
+		*seg = (*seg)->next;
+		*trb = ((*seg)->trbs);
+	} else {
+		*trb = (*trb)++;
+	}
+}
+
+/*
+ * See Cycle bit rules. SW is the consumer for the event ring only.
+ * Don't make a ring full of link TRBs.  That would be dumb and this would loop.
+ */
+static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer)
+{
+	union xhci_trb *next = ++(ring->dequeue);
+
+	ring->deq_updates++;
+	/* Update the dequeue pointer further if that was a link TRB or we're at
+	 * the end of an event ring segment (which doesn't have link TRBS)
+	 */
+	while (last_trb(xhci, ring, ring->deq_seg, next)) {
+		if (consumer && last_trb_on_last_seg(xhci, ring, ring->deq_seg, next)) {
+			ring->cycle_state = (ring->cycle_state ? 0 : 1);
+			if (!in_interrupt())
+				xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n",
+						ring,
+						(unsigned int) ring->cycle_state);
+		}
+		ring->deq_seg = ring->deq_seg->next;
+		ring->dequeue = ring->deq_seg->trbs;
+		next = ring->dequeue;
+	}
+}
+
+/*
+ * See Cycle bit rules. SW is the consumer for the event ring only.
+ * Don't make a ring full of link TRBs.  That would be dumb and this would loop.
+ *
+ * If we've just enqueued a TRB that is in the middle of a TD (meaning the
+ * chain bit is set), then set the chain bit in all the following link TRBs.
+ * If we've enqueued the last TRB in a TD, make sure the following link TRBs
+ * have their chain bit cleared (so that each Link TRB is a separate TD).
+ *
+ * Section 6.4.4.1 of the 0.95 spec says link TRBs cannot have the chain bit
+ * set, but other sections talk about dealing with the chain bit set.
+ * Assume section 6.4.4.1 is wrong, and the chain bit can be set in a Link TRB.
+ */
+static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer)
+{
+	u32 chain;
+	union xhci_trb *next;
+
+	chain = ring->enqueue->generic.field[3] & TRB_CHAIN;
+	next = ++(ring->enqueue);
+
+	ring->enq_updates++;
+	/* Update the dequeue pointer further if that was a link TRB or we're at
+	 * the end of an event ring segment (which doesn't have link TRBS)
+	 */
+	while (last_trb(xhci, ring, ring->enq_seg, next)) {
+		if (!consumer) {
+			if (ring != xhci->event_ring) {
+				next->link.control &= ~TRB_CHAIN;
+				next->link.control |= chain;
+				/* Give this link TRB to the hardware */
+				wmb();
+				if (next->link.control & TRB_CYCLE)
+					next->link.control &= (u32) ~TRB_CYCLE;
+				else
+					next->link.control |= (u32) TRB_CYCLE;
+			}
+			/* Toggle the cycle bit after the last ring segment. */
+			if (last_trb_on_last_seg(xhci, ring, ring->enq_seg, next)) {
+				ring->cycle_state = (ring->cycle_state ? 0 : 1);
+				if (!in_interrupt())
+					xhci_dbg(xhci, "Toggle cycle state for ring %p = %i\n",
+							ring,
+							(unsigned int) ring->cycle_state);
+			}
+		}
+		ring->enq_seg = ring->enq_seg->next;
+		ring->enqueue = ring->enq_seg->trbs;
+		next = ring->enqueue;
+	}
+}
+
+/*
+ * Check to see if there's room to enqueue num_trbs on the ring.  See rules
+ * above.
+ * FIXME: this would be simpler and faster if we just kept track of the number
+ * of free TRBs in a ring.
+ */
+static int room_on_ring(struct xhci_hcd *xhci, struct xhci_ring *ring,
+		unsigned int num_trbs)
+{
+	int i;
+	union xhci_trb *enq = ring->enqueue;
+	struct xhci_segment *enq_seg = ring->enq_seg;
+
+	/* Check if ring is empty */
+	if (enq == ring->dequeue)
+		return 1;
+	/* Make sure there's an extra empty TRB available */
+	for (i = 0; i <= num_trbs; ++i) {
+		if (enq == ring->dequeue)
+			return 0;
+		enq++;
+		while (last_trb(xhci, ring, enq_seg, enq)) {
+			enq_seg = enq_seg->next;
+			enq = enq_seg->trbs;
+		}
+	}
+	return 1;
+}
+
+void xhci_set_hc_event_deq(struct xhci_hcd *xhci)
+{
+	u32 temp;
+	dma_addr_t deq;
+
+	deq = xhci_trb_virt_to_dma(xhci->event_ring->deq_seg,
+			xhci->event_ring->dequeue);
+	if (deq == 0 && !in_interrupt())
+		xhci_warn(xhci, "WARN something wrong with SW event ring "
+				"dequeue ptr.\n");
+	/* Update HC event ring dequeue pointer */
+	temp = xhci_readl(xhci, &xhci->ir_set->erst_dequeue[0]);
+	temp &= ERST_PTR_MASK;
+	if (!in_interrupt())
+		xhci_dbg(xhci, "// Write event ring dequeue pointer\n");
+	xhci_writel(xhci, 0, &xhci->ir_set->erst_dequeue[1]);
+	xhci_writel(xhci, (deq & ~ERST_PTR_MASK) | temp,
+			&xhci->ir_set->erst_dequeue[0]);
+}
+
+/* Ring the host controller doorbell after placing a command on the ring */
+void xhci_ring_cmd_db(struct xhci_hcd *xhci)
+{
+	u32 temp;
+
+	xhci_dbg(xhci, "// Ding dong!\n");
+	temp = xhci_readl(xhci, &xhci->dba->doorbell[0]) & DB_MASK;
+	xhci_writel(xhci, temp | DB_TARGET_HOST, &xhci->dba->doorbell[0]);
+	/* Flush PCI posted writes */
+	xhci_readl(xhci, &xhci->dba->doorbell[0]);
+}
+
+static void ring_ep_doorbell(struct xhci_hcd *xhci,
+		unsigned int slot_id,
+		unsigned int ep_index)
+{
+	struct xhci_ring *ep_ring;
+	u32 field;
+	__u32 __iomem *db_addr = &xhci->dba->doorbell[slot_id];
+
+	ep_ring = xhci->devs[slot_id]->ep_rings[ep_index];
+	/* Don't ring the doorbell for this endpoint if there are pending
+	 * cancellations because the we don't want to interrupt processing.
+	 */
+	if (!ep_ring->cancels_pending && !(ep_ring->state & SET_DEQ_PENDING)) {
+		field = xhci_readl(xhci, db_addr) & DB_MASK;
+		xhci_writel(xhci, field | EPI_TO_DB(ep_index), db_addr);
+		/* Flush PCI posted writes - FIXME Matthew Wilcox says this
+		 * isn't time-critical and we shouldn't make the CPU wait for
+		 * the flush.
+		 */
+		xhci_readl(xhci, db_addr);
+	}
+}
+
+/*
+ * Find the segment that trb is in.  Start searching in start_seg.
+ * If we must move past a segment that has a link TRB with a toggle cycle state
+ * bit set, then we will toggle the value pointed at by cycle_state.
+ */
+static struct xhci_segment *find_trb_seg(
+		struct xhci_segment *start_seg,
+		union xhci_trb	*trb, int *cycle_state)
+{
+	struct xhci_segment *cur_seg = start_seg;
+	struct xhci_generic_trb *generic_trb;
+
+	while (cur_seg->trbs > trb ||
+			&cur_seg->trbs[TRBS_PER_SEGMENT - 1] < trb) {
+		generic_trb = &cur_seg->trbs[TRBS_PER_SEGMENT - 1].generic;
+		if (TRB_TYPE(generic_trb->field[3]) == TRB_LINK &&
+				(generic_trb->field[3] & LINK_TOGGLE))
+			*cycle_state = ~(*cycle_state) & 0x1;
+		cur_seg = cur_seg->next;
+		if (cur_seg == start_seg)
+			/* Looped over the entire list.  Oops! */
+			return 0;
+	}
+	return cur_seg;
+}
+
+struct dequeue_state {
+	struct xhci_segment *new_deq_seg;
+	union xhci_trb *new_deq_ptr;
+	int new_cycle_state;
+};
+
+/*
+ * Move the xHC's endpoint ring dequeue pointer past cur_td.
+ * Record the new state of the xHC's endpoint ring dequeue segment,
+ * dequeue pointer, and new consumer cycle state in state.
+ * Update our internal representation of the ring's dequeue pointer.
+ *
+ * We do this in three jumps:
+ *  - First we update our new ring state to be the same as when the xHC stopped.
+ *  - Then we traverse the ring to find the segment that contains
+ *    the last TRB in the TD.  We toggle the xHC's new cycle state when we pass
+ *    any link TRBs with the toggle cycle bit set.
+ *  - Finally we move the dequeue state one TRB further, toggling the cycle bit
+ *    if we've moved it past a link TRB with the toggle cycle bit set.
+ */
+static void find_new_dequeue_state(struct xhci_hcd *xhci,
+		unsigned int slot_id, unsigned int ep_index,
+		struct xhci_td *cur_td, struct dequeue_state *state)
+{
+	struct xhci_virt_device *dev = xhci->devs[slot_id];
+	struct xhci_ring *ep_ring = dev->ep_rings[ep_index];
+	struct xhci_generic_trb *trb;
+
+	state->new_cycle_state = 0;
+	state->new_deq_seg = find_trb_seg(cur_td->start_seg,
+			ep_ring->stopped_trb,
+			&state->new_cycle_state);
+	if (!state->new_deq_seg)
+		BUG();
+	/* Dig out the cycle state saved by the xHC during the stop ep cmd */
+	state->new_cycle_state = 0x1 & dev->out_ctx->ep[ep_index].deq[0];
+
+	state->new_deq_ptr = cur_td->last_trb;
+	state->new_deq_seg = find_trb_seg(state->new_deq_seg,
+			state->new_deq_ptr,
+			&state->new_cycle_state);
+	if (!state->new_deq_seg)
+		BUG();
+
+	trb = &state->new_deq_ptr->generic;
+	if (TRB_TYPE(trb->field[3]) == TRB_LINK &&
+				(trb->field[3] & LINK_TOGGLE))
+		state->new_cycle_state = ~(state->new_cycle_state) & 0x1;
+	next_trb(xhci, ep_ring, &state->new_deq_seg, &state->new_deq_ptr);
+
+	/* Don't update the ring cycle state for the producer (us). */
+	ep_ring->dequeue = state->new_deq_ptr;
+	ep_ring->deq_seg = state->new_deq_seg;
+}
+
+static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
+		struct xhci_td *cur_td)
+{
+	struct xhci_segment *cur_seg;
+	union xhci_trb *cur_trb;
+
+	for (cur_seg = cur_td->start_seg, cur_trb = cur_td->first_trb;
+			true;
+			next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
+		if ((cur_trb->generic.field[3] & TRB_TYPE_BITMASK) ==
+				TRB_TYPE(TRB_LINK)) {
+			/* Unchain any chained Link TRBs, but
+			 * leave the pointers intact.
+			 */
+			cur_trb->generic.field[3] &= ~TRB_CHAIN;
+			xhci_dbg(xhci, "Cancel (unchain) link TRB\n");
+			xhci_dbg(xhci, "Address = %p (0x%llx dma); "
+					"in seg %p (0x%llx dma)\n",
+					cur_trb,
+					(unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb),
+					cur_seg,
+					(unsigned long long)cur_seg->dma);
+		} else {
+			cur_trb->generic.field[0] = 0;
+			cur_trb->generic.field[1] = 0;
+			cur_trb->generic.field[2] = 0;
+			/* Preserve only the cycle bit of this TRB */
+			cur_trb->generic.field[3] &= TRB_CYCLE;
+			cur_trb->generic.field[3] |= TRB_TYPE(TRB_TR_NOOP);
+			xhci_dbg(xhci, "Cancel TRB %p (0x%llx dma) "
+					"in seg %p (0x%llx dma)\n",
+					cur_trb,
+					(unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb),
+					cur_seg,
+					(unsigned long long)cur_seg->dma);
+		}
+		if (cur_trb == cur_td->last_trb)
+			break;
+	}
+}
+
+static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
+		unsigned int ep_index, struct xhci_segment *deq_seg,
+		union xhci_trb *deq_ptr, u32 cycle_state);
+
+/*
+ * When we get a command completion for a Stop Endpoint Command, we need to
+ * unlink any cancelled TDs from the ring.  There are two ways to do that:
+ *
+ *  1. If the HW was in the middle of processing the TD that needs to be
+ *     cancelled, then we must move the ring's dequeue pointer past the last TRB
+ *     in the TD with a Set Dequeue Pointer Command.
+ *  2. Otherwise, we turn all the TRBs in the TD into No-op TRBs (with the chain
+ *     bit cleared) so that the HW will skip over them.
+ */
+static void handle_stopped_endpoint(struct xhci_hcd *xhci,
+		union xhci_trb *trb)
+{
+	unsigned int slot_id;
+	unsigned int ep_index;
+	struct xhci_ring *ep_ring;
+	struct list_head *entry;
+	struct xhci_td *cur_td = 0;
+	struct xhci_td *last_unlinked_td;
+
+	struct dequeue_state deq_state;
+#ifdef CONFIG_USB_HCD_STAT
+	ktime_t stop_time = ktime_get();
+#endif
+
+	memset(&deq_state, 0, sizeof(deq_state));
+	slot_id = TRB_TO_SLOT_ID(trb->generic.field[3]);
+	ep_index = TRB_TO_EP_INDEX(trb->generic.field[3]);
+	ep_ring = xhci->devs[slot_id]->ep_rings[ep_index];
+
+	if (list_empty(&ep_ring->cancelled_td_list))
+		return;
+
+	/* Fix up the ep ring first, so HW stops executing cancelled TDs.
+	 * We have the xHCI lock, so nothing can modify this list until we drop
+	 * it.  We're also in the event handler, so we can't get re-interrupted
+	 * if another Stop Endpoint command completes
+	 */
+	list_for_each(entry, &ep_ring->cancelled_td_list) {
+		cur_td = list_entry(entry, struct xhci_td, cancelled_td_list);
+		xhci_dbg(xhci, "Cancelling TD starting at %p, 0x%llx (dma).\n",
+				cur_td->first_trb,
+				(unsigned long long)xhci_trb_virt_to_dma(cur_td->start_seg, cur_td->first_trb));
+		/*
+		 * If we stopped on the TD we need to cancel, then we have to
+		 * move the xHC endpoint ring dequeue pointer past this TD.
+		 */
+		if (cur_td == ep_ring->stopped_td)
+			find_new_dequeue_state(xhci, slot_id, ep_index, cur_td,
+					&deq_state);
+		else
+			td_to_noop(xhci, ep_ring, cur_td);
+		/*
+		 * The event handler won't see a completion for this TD anymore,
+		 * so remove it from the endpoint ring's TD list.  Keep it in
+		 * the cancelled TD list for URB completion later.
+		 */
+		list_del(&cur_td->td_list);
+		ep_ring->cancels_pending--;
+	}
+	last_unlinked_td = cur_td;
+
+	/* If necessary, queue a Set Transfer Ring Dequeue Pointer command */
+	if (deq_state.new_deq_ptr && deq_state.new_deq_seg) {
+		xhci_dbg(xhci, "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), "
+				"new deq ptr = %p (0x%llx dma), new cycle = %u\n",
+				deq_state.new_deq_seg,
+				(unsigned long long)deq_state.new_deq_seg->dma,
+				deq_state.new_deq_ptr,
+				(unsigned long long)xhci_trb_virt_to_dma(deq_state.new_deq_seg, deq_state.new_deq_ptr),
+				deq_state.new_cycle_state);
+		queue_set_tr_deq(xhci, slot_id, ep_index,
+				deq_state.new_deq_seg,
+				deq_state.new_deq_ptr,
+				(u32) deq_state.new_cycle_state);
+		/* Stop the TD queueing code from ringing the doorbell until
+		 * this command completes.  The HC won't set the dequeue pointer
+		 * if the ring is running, and ringing the doorbell starts the
+		 * ring running.
+		 */
+		ep_ring->state |= SET_DEQ_PENDING;
+		xhci_ring_cmd_db(xhci);
+	} else {
+		/* Otherwise just ring the doorbell to restart the ring */
+		ring_ep_doorbell(xhci, slot_id, ep_index);
+	}
+
+	/*
+	 * Drop the lock and complete the URBs in the cancelled TD list.
+	 * New TDs to be cancelled might be added to the end of the list before
+	 * we can complete all the URBs for the TDs we already unlinked.
+	 * So stop when we've completed the URB for the last TD we unlinked.
+	 */
+	do {
+		cur_td = list_entry(ep_ring->cancelled_td_list.next,
+				struct xhci_td, cancelled_td_list);
+		list_del(&cur_td->cancelled_td_list);
+
+		/* Clean up the cancelled URB */
+#ifdef CONFIG_USB_HCD_STAT
+		hcd_stat_update(xhci->tp_stat, cur_td->urb->actual_length,
+				ktime_sub(stop_time, cur_td->start_time));
+#endif
+		cur_td->urb->hcpriv = NULL;
+		usb_hcd_unlink_urb_from_ep(xhci_to_hcd(xhci), cur_td->urb);
+
+		xhci_dbg(xhci, "Giveback cancelled URB %p\n", cur_td->urb);
+		spin_unlock(&xhci->lock);
+		/* Doesn't matter what we pass for status, since the core will
+		 * just overwrite it (because the URB has been unlinked).
+		 */
+		usb_hcd_giveback_urb(xhci_to_hcd(xhci), cur_td->urb, 0);
+		kfree(cur_td);
+
+		spin_lock(&xhci->lock);
+	} while (cur_td != last_unlinked_td);
+
+	/* Return to the event handler with xhci->lock re-acquired */
+}
+
+/*
+ * When we get a completion for a Set Transfer Ring Dequeue Pointer command,
+ * we need to clear the set deq pending flag in the endpoint ring state, so that
+ * the TD queueing code can ring the doorbell again.  We also need to ring the
+ * endpoint doorbell to restart the ring, but only if there aren't more
+ * cancellations pending.
+ */
+static void handle_set_deq_completion(struct xhci_hcd *xhci,
+		struct xhci_event_cmd *event,
+		union xhci_trb *trb)
+{
+	unsigned int slot_id;
+	unsigned int ep_index;
+	struct xhci_ring *ep_ring;
+	struct xhci_virt_device *dev;
+
+	slot_id = TRB_TO_SLOT_ID(trb->generic.field[3]);
+	ep_index = TRB_TO_EP_INDEX(trb->generic.field[3]);
+	dev = xhci->devs[slot_id];
+	ep_ring = dev->ep_rings[ep_index];
+
+	if (GET_COMP_CODE(event->status) != COMP_SUCCESS) {
+		unsigned int ep_state;
+		unsigned int slot_state;
+
+		switch (GET_COMP_CODE(event->status)) {
+		case COMP_TRB_ERR:
+			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd invalid because "
+					"of stream ID configuration\n");
+			break;
+		case COMP_CTX_STATE:
+			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed due "
+					"to incorrect slot or ep state.\n");
+			ep_state = dev->out_ctx->ep[ep_index].ep_info;
+			ep_state &= EP_STATE_MASK;
+			slot_state = dev->out_ctx->slot.dev_state;
+			slot_state = GET_SLOT_STATE(slot_state);
+			xhci_dbg(xhci, "Slot state = %u, EP state = %u\n",
+					slot_state, ep_state);
+			break;
+		case COMP_EBADSLT:
+			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd failed because "
+					"slot %u was not enabled.\n", slot_id);
+			break;
+		default:
+			xhci_warn(xhci, "WARN Set TR Deq Ptr cmd with unknown "
+					"completion code of %u.\n",
+					GET_COMP_CODE(event->status));
+			break;
+		}
+		/* OK what do we do now?  The endpoint state is hosed, and we
+		 * should never get to this point if the synchronization between
+		 * queueing, and endpoint state are correct.  This might happen
+		 * if the device gets disconnected after we've finished
+		 * cancelling URBs, which might not be an error...
+		 */
+	} else {
+		xhci_dbg(xhci, "Successful Set TR Deq Ptr cmd, deq[0] = 0x%x, "
+				"deq[1] = 0x%x.\n",
+				dev->out_ctx->ep[ep_index].deq[0],
+				dev->out_ctx->ep[ep_index].deq[1]);
+	}
+
+	ep_ring->state &= ~SET_DEQ_PENDING;
+	ring_ep_doorbell(xhci, slot_id, ep_index);
+}
+
+
+static void handle_cmd_completion(struct xhci_hcd *xhci,
+		struct xhci_event_cmd *event)
+{
+	int slot_id = TRB_TO_SLOT_ID(event->flags);
+	u64 cmd_dma;
+	dma_addr_t cmd_dequeue_dma;
+
+	cmd_dma = (((u64) event->cmd_trb[1]) << 32) + event->cmd_trb[0];
+	cmd_dequeue_dma = xhci_trb_virt_to_dma(xhci->cmd_ring->deq_seg,
+			xhci->cmd_ring->dequeue);
+	/* Is the command ring deq ptr out of sync with the deq seg ptr? */
+	if (cmd_dequeue_dma == 0) {
+		xhci->error_bitmask |= 1 << 4;
+		return;
+	}
+	/* Does the DMA address match our internal dequeue pointer address? */
+	if (cmd_dma != (u64) cmd_dequeue_dma) {
+		xhci->error_bitmask |= 1 << 5;
+		return;
+	}
+	switch (xhci->cmd_ring->dequeue->generic.field[3] & TRB_TYPE_BITMASK) {
+	case TRB_TYPE(TRB_ENABLE_SLOT):
+		if (GET_COMP_CODE(event->status) == COMP_SUCCESS)
+			xhci->slot_id = slot_id;
+		else
+			xhci->slot_id = 0;
+		complete(&xhci->addr_dev);
+		break;
+	case TRB_TYPE(TRB_DISABLE_SLOT):
+		if (xhci->devs[slot_id])
+			xhci_free_virt_device(xhci, slot_id);
+		break;
+	case TRB_TYPE(TRB_CONFIG_EP):
+		xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(event->status);
+		complete(&xhci->devs[slot_id]->cmd_completion);
+		break;
+	case TRB_TYPE(TRB_ADDR_DEV):
+		xhci->devs[slot_id]->cmd_status = GET_COMP_CODE(event->status);
+		complete(&xhci->addr_dev);
+		break;
+	case TRB_TYPE(TRB_STOP_RING):
+		handle_stopped_endpoint(xhci, xhci->cmd_ring->dequeue);
+		break;
+	case TRB_TYPE(TRB_SET_DEQ):
+		handle_set_deq_completion(xhci, event, xhci->cmd_ring->dequeue);
+		break;
+	case TRB_TYPE(TRB_CMD_NOOP):
+		++xhci->noops_handled;
+		break;
+	default:
+		/* Skip over unknown commands on the event ring */
+		xhci->error_bitmask |= 1 << 6;
+		break;
+	}
+	inc_deq(xhci, xhci->cmd_ring, false);
+}
+
+static void handle_port_status(struct xhci_hcd *xhci,
+		union xhci_trb *event)
+{
+	u32 port_id;
+
+	/* Port status change events always have a successful completion code */
+	if (GET_COMP_CODE(event->generic.field[2]) != COMP_SUCCESS) {
+		xhci_warn(xhci, "WARN: xHC returned failed port status event\n");
+		xhci->error_bitmask |= 1 << 8;
+	}
+	/* FIXME: core doesn't care about all port link state changes yet */
+	port_id = GET_PORT_ID(event->generic.field[0]);
+	xhci_dbg(xhci, "Port Status Change Event for port %d\n", port_id);
+
+	/* Update event ring dequeue pointer before dropping the lock */
+	inc_deq(xhci, xhci->event_ring, true);
+	xhci_set_hc_event_deq(xhci);
+
+	spin_unlock(&xhci->lock);
+	/* Pass this up to the core */
+	usb_hcd_poll_rh_status(xhci_to_hcd(xhci));
+	spin_lock(&xhci->lock);
+}
+
+/*
+ * This TD is defined by the TRBs starting at start_trb in start_seg and ending
+ * at end_trb, which may be in another segment.  If the suspect DMA address is a
+ * TRB in this TD, this function returns that TRB's segment.  Otherwise it
+ * returns 0.
+ */
+static struct xhci_segment *trb_in_td(
+		struct xhci_segment *start_seg,
+		union xhci_trb	*start_trb,
+		union xhci_trb	*end_trb,
+		dma_addr_t	suspect_dma)
+{
+	dma_addr_t start_dma;
+	dma_addr_t end_seg_dma;
+	dma_addr_t end_trb_dma;
+	struct xhci_segment *cur_seg;
+
+	start_dma = xhci_trb_virt_to_dma(start_seg, start_trb);
+	cur_seg = start_seg;
+
+	do {
+		/* We may get an event for a Link TRB in the middle of a TD */
+		end_seg_dma = xhci_trb_virt_to_dma(cur_seg,
+				&start_seg->trbs[TRBS_PER_SEGMENT - 1]);
+		/* If the end TRB isn't in this segment, this is set to 0 */
+		end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb);
+
+		if (end_trb_dma > 0) {
+			/* The end TRB is in this segment, so suspect should be here */
+			if (start_dma <= end_trb_dma) {
+				if (suspect_dma >= start_dma && suspect_dma <= end_trb_dma)
+					return cur_seg;
+			} else {
+				/* Case for one segment with
+				 * a TD wrapped around to the top
+				 */
+				if ((suspect_dma >= start_dma &&
+							suspect_dma <= end_seg_dma) ||
+						(suspect_dma >= cur_seg->dma &&
+						 suspect_dma <= end_trb_dma))
+					return cur_seg;
+			}
+			return 0;
+		} else {
+			/* Might still be somewhere in this segment */
+			if (suspect_dma >= start_dma && suspect_dma <= end_seg_dma)
+				return cur_seg;
+		}
+		cur_seg = cur_seg->next;
+		start_dma = xhci_trb_virt_to_dma(cur_seg, &cur_seg->trbs[0]);
+	} while (1);
+
+}
+
+/*
+ * If this function returns an error condition, it means it got a Transfer
+ * event with a corrupted Slot ID, Endpoint ID, or TRB DMA address.
+ * At this point, the host controller is probably hosed and should be reset.
+ */
+static int handle_tx_event(struct xhci_hcd *xhci,
+		struct xhci_transfer_event *event)
+{
+	struct xhci_virt_device *xdev;
+	struct xhci_ring *ep_ring;
+	int ep_index;
+	struct xhci_td *td = 0;
+	dma_addr_t event_dma;
+	struct xhci_segment *event_seg;
+	union xhci_trb *event_trb;
+	struct urb *urb = 0;
+	int status = -EINPROGRESS;
+
+	xdev = xhci->devs[TRB_TO_SLOT_ID(event->flags)];
+	if (!xdev) {
+		xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n");
+		return -ENODEV;
+	}
+
+	/* Endpoint ID is 1 based, our index is zero based */
+	ep_index = TRB_TO_EP_ID(event->flags) - 1;
+	ep_ring = xdev->ep_rings[ep_index];
+	if (!ep_ring || (xdev->out_ctx->ep[ep_index].ep_info & EP_STATE_MASK) == EP_STATE_DISABLED) {
+		xhci_err(xhci, "ERROR Transfer event pointed to disabled endpoint\n");
+		return -ENODEV;
+	}
+
+	event_dma = event->buffer[0];
+	if (event->buffer[1] != 0)
+		xhci_warn(xhci, "WARN ignoring upper 32-bits of 64-bit TRB dma address\n");
+
+	/* This TRB should be in the TD at the head of this ring's TD list */
+	if (list_empty(&ep_ring->td_list)) {
+		xhci_warn(xhci, "WARN Event TRB for slot %d ep %d with no TDs queued?\n",
+				TRB_TO_SLOT_ID(event->flags), ep_index);
+		xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
+				(unsigned int) (event->flags & TRB_TYPE_BITMASK)>>10);
+		xhci_print_trb_offsets(xhci, (union xhci_trb *) event);
+		urb = NULL;
+		goto cleanup;
+	}
+	td = list_entry(ep_ring->td_list.next, struct xhci_td, td_list);
+
+	/* Is this a TRB in the currently executing TD? */
+	event_seg = trb_in_td(ep_ring->deq_seg, ep_ring->dequeue,
+			td->last_trb, event_dma);
+	if (!event_seg) {
+		/* HC is busted, give up! */
+		xhci_err(xhci, "ERROR Transfer event TRB DMA ptr not part of current TD\n");
+		return -ESHUTDOWN;
+	}
+	event_trb = &event_seg->trbs[(event_dma - event_seg->dma) / sizeof(*event_trb)];
+	xhci_dbg(xhci, "Event TRB with TRB type ID %u\n",
+			(unsigned int) (event->flags & TRB_TYPE_BITMASK)>>10);
+	xhci_dbg(xhci, "Offset 0x00 (buffer[0]) = 0x%x\n",
+			(unsigned int) event->buffer[0]);
+	xhci_dbg(xhci, "Offset 0x04 (buffer[0]) = 0x%x\n",
+			(unsigned int) event->buffer[1]);
+	xhci_dbg(xhci, "Offset 0x08 (transfer length) = 0x%x\n",
+			(unsigned int) event->transfer_len);
+	xhci_dbg(xhci, "Offset 0x0C (flags) = 0x%x\n",
+			(unsigned int) event->flags);
+
+	/* Look for common error cases */
+	switch (GET_COMP_CODE(event->transfer_len)) {
+	/* Skip codes that require special handling depending on
+	 * transfer type
+	 */
+	case COMP_SUCCESS:
+	case COMP_SHORT_TX:
+		break;
+	case COMP_STOP:
+		xhci_dbg(xhci, "Stopped on Transfer TRB\n");
+		break;
+	case COMP_STOP_INVAL:
+		xhci_dbg(xhci, "Stopped on No-op or Link TRB\n");
+		break;
+	case COMP_STALL:
+		xhci_warn(xhci, "WARN: Stalled endpoint\n");
+		status = -EPIPE;
+		break;
+	case COMP_TRB_ERR:
+		xhci_warn(xhci, "WARN: TRB error on endpoint\n");
+		status = -EILSEQ;
+		break;
+	case COMP_TX_ERR:
+		xhci_warn(xhci, "WARN: transfer error on endpoint\n");
+		status = -EPROTO;
+		break;
+	case COMP_DB_ERR:
+		xhci_warn(xhci, "WARN: HC couldn't access mem fast enough\n");
+		status = -ENOSR;
+		break;
+	default:
+		xhci_warn(xhci, "ERROR Unknown event condition, HC probably busted\n");
+		urb = NULL;
+		goto cleanup;
+	}
+	/* Now update the urb's actual_length and give back to the core */
+	/* Was this a control transfer? */
+	if (usb_endpoint_xfer_control(&td->urb->ep->desc)) {
+		xhci_debug_trb(xhci, xhci->event_ring->dequeue);
+		switch (GET_COMP_CODE(event->transfer_len)) {
+		case COMP_SUCCESS:
+			if (event_trb == ep_ring->dequeue) {
+				xhci_warn(xhci, "WARN: Success on ctrl setup TRB without IOC set??\n");
+				status = -ESHUTDOWN;
+			} else if (event_trb != td->last_trb) {
+				xhci_warn(xhci, "WARN: Success on ctrl data TRB without IOC set??\n");
+				status = -ESHUTDOWN;
+			} else {
+				xhci_dbg(xhci, "Successful control transfer!\n");
+				status = 0;
+			}
+			break;
+		case COMP_SHORT_TX:
+			xhci_warn(xhci, "WARN: short transfer on control ep\n");
+			status = -EREMOTEIO;
+			break;
+		default:
+			/* Others already handled above */
+			break;
+		}
+		/*
+		 * Did we transfer any data, despite the errors that might have
+		 * happened?  I.e. did we get past the setup stage?
+		 */
+		if (event_trb != ep_ring->dequeue) {
+			/* The event was for the status stage */
+			if (event_trb == td->last_trb) {
+				td->urb->actual_length =
+					td->urb->transfer_buffer_length;
+			} else {
+			/* Maybe the event was for the data stage? */
+				if (GET_COMP_CODE(event->transfer_len) != COMP_STOP_INVAL)
+					/* We didn't stop on a link TRB in the middle */
+					td->urb->actual_length =
+						td->urb->transfer_buffer_length -
+						TRB_LEN(event->transfer_len);
+			}
+		}
+	} else {
+		switch (GET_COMP_CODE(event->transfer_len)) {
+		case COMP_SUCCESS:
+			/* Double check that the HW transferred everything. */
+			if (event_trb != td->last_trb) {
+				xhci_warn(xhci, "WARN Successful completion "
+						"on short TX\n");
+				if (td->urb->transfer_flags & URB_SHORT_NOT_OK)
+					status = -EREMOTEIO;
+				else
+					status = 0;
+			} else {
+				xhci_dbg(xhci, "Successful bulk transfer!\n");
+				status = 0;
+			}
+			break;
+		case COMP_SHORT_TX:
+			if (td->urb->transfer_flags & URB_SHORT_NOT_OK)
+				status = -EREMOTEIO;
+			else
+				status = 0;
+			break;
+		default:
+			/* Others already handled above */
+			break;
+		}
+		dev_dbg(&td->urb->dev->dev,
+				"ep %#x - asked for %d bytes, "
+				"%d bytes untransferred\n",
+				td->urb->ep->desc.bEndpointAddress,
+				td->urb->transfer_buffer_length,
+				TRB_LEN(event->transfer_len));
+		/* Fast path - was this the last TRB in the TD for this URB? */
+		if (event_trb == td->last_trb) {
+			if (TRB_LEN(event->transfer_len) != 0) {
+				td->urb->actual_length =
+					td->urb->transfer_buffer_length -
+					TRB_LEN(event->transfer_len);
+				if (td->urb->actual_length < 0) {
+					xhci_warn(xhci, "HC gave bad length "
+							"of %d bytes left\n",
+							TRB_LEN(event->transfer_len));
+					td->urb->actual_length = 0;
+				}
+				if (td->urb->transfer_flags & URB_SHORT_NOT_OK)
+					status = -EREMOTEIO;
+				else
+					status = 0;
+			} else {
+				td->urb->actual_length = td->urb->transfer_buffer_length;
+				/* Ignore a short packet completion if the
+				 * untransferred length was zero.
+				 */
+				status = 0;
+			}
+		} else {
+			/* Slow path - walk the list, starting from the dequeue
+			 * pointer, to get the actual length transferred.
+			 */
+			union xhci_trb *cur_trb;
+			struct xhci_segment *cur_seg;
+
+			td->urb->actual_length = 0;
+			for (cur_trb = ep_ring->dequeue, cur_seg = ep_ring->deq_seg;
+					cur_trb != event_trb;
+					next_trb(xhci, ep_ring, &cur_seg, &cur_trb)) {
+				if (TRB_TYPE(cur_trb->generic.field[3]) != TRB_TR_NOOP &&
+						TRB_TYPE(cur_trb->generic.field[3]) != TRB_LINK)
+					td->urb->actual_length +=
+						TRB_LEN(cur_trb->generic.field[2]);
+			}
+			/* If the ring didn't stop on a Link or No-op TRB, add
+			 * in the actual bytes transferred from the Normal TRB
+			 */
+			if (GET_COMP_CODE(event->transfer_len) != COMP_STOP_INVAL)
+				td->urb->actual_length +=
+					TRB_LEN(cur_trb->generic.field[2]) -
+					TRB_LEN(event->transfer_len);
+		}
+	}
+	/* The Endpoint Stop Command completion will take care of
+	 * any stopped TDs.  A stopped TD may be restarted, so don't update the
+	 * ring dequeue pointer or take this TD off any lists yet.
+	 */
+	if (GET_COMP_CODE(event->transfer_len) == COMP_STOP_INVAL ||
+			GET_COMP_CODE(event->transfer_len) == COMP_STOP) {
+		ep_ring->stopped_td = td;
+		ep_ring->stopped_trb = event_trb;
+	} else {
+		/* Update ring dequeue pointer */
+		while (ep_ring->dequeue != td->last_trb)
+			inc_deq(xhci, ep_ring, false);
+		inc_deq(xhci, ep_ring, false);
+
+		/* Clean up the endpoint's TD list */
+		urb = td->urb;
+		list_del(&td->td_list);
+		/* Was this TD slated to be cancelled but completed anyway? */
+		if (!list_empty(&td->cancelled_td_list)) {
+			list_del(&td->cancelled_td_list);
+			ep_ring->cancels_pending--;
+		}
+		kfree(td);
+		urb->hcpriv = NULL;
+	}
+cleanup:
+	inc_deq(xhci, xhci->event_ring, true);
+	xhci_set_hc_event_deq(xhci);
+
+	/* FIXME for multi-TD URBs (who have buffers bigger than 64MB) */
+	if (urb) {
+		usb_hcd_unlink_urb_from_ep(xhci_to_hcd(xhci), urb);
+		spin_unlock(&xhci->lock);
+		usb_hcd_giveback_urb(xhci_to_hcd(xhci), urb, status);
+		spin_lock(&xhci->lock);
+	}
+	return 0;
+}
+
+/*
+ * This function handles all OS-owned events on the event ring.  It may drop
+ * xhci->lock between event processing (e.g. to pass up port status changes).
+ */
+void xhci_handle_event(struct xhci_hcd *xhci)
+{
+	union xhci_trb *event;
+	int update_ptrs = 1;
+	int ret;
+
+	if (!xhci->event_ring || !xhci->event_ring->dequeue) {
+		xhci->error_bitmask |= 1 << 1;
+		return;
+	}
+
+	event = xhci->event_ring->dequeue;
+	/* Does the HC or OS own the TRB? */
+	if ((event->event_cmd.flags & TRB_CYCLE) !=
+			xhci->event_ring->cycle_state) {
+		xhci->error_bitmask |= 1 << 2;
+		return;
+	}
+
+	/* FIXME: Handle more event types. */
+	switch ((event->event_cmd.flags & TRB_TYPE_BITMASK)) {
+	case TRB_TYPE(TRB_COMPLETION):
+		handle_cmd_completion(xhci, &event->event_cmd);
+		break;
+	case TRB_TYPE(TRB_PORT_STATUS):
+		handle_port_status(xhci, event);
+		update_ptrs = 0;
+		break;
+	case TRB_TYPE(TRB_TRANSFER):
+		ret = handle_tx_event(xhci, &event->trans_event);
+		if (ret < 0)
+			xhci->error_bitmask |= 1 << 9;
+		else
+			update_ptrs = 0;
+		break;
+	default:
+		xhci->error_bitmask |= 1 << 3;
+	}
+
+	if (update_ptrs) {
+		/* Update SW and HC event ring dequeue pointer */
+		inc_deq(xhci, xhci->event_ring, true);
+		xhci_set_hc_event_deq(xhci);
+	}
+	/* Are there more items on the event ring? */
+	xhci_handle_event(xhci);
+}
+
+/****		Endpoint Ring Operations	****/
+
+/*
+ * Generic function for queueing a TRB on a ring.
+ * The caller must have checked to make sure there's room on the ring.
+ */
+static void queue_trb(struct xhci_hcd *xhci, struct xhci_ring *ring,
+		bool consumer,
+		u32 field1, u32 field2, u32 field3, u32 field4)
+{
+	struct xhci_generic_trb *trb;
+
+	trb = &ring->enqueue->generic;
+	trb->field[0] = field1;
+	trb->field[1] = field2;
+	trb->field[2] = field3;
+	trb->field[3] = field4;
+	inc_enq(xhci, ring, consumer);
+}
+
+/*
+ * Does various checks on the endpoint ring, and makes it ready to queue num_trbs.
+ * FIXME allocate segments if the ring is full.
+ */
+static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
+		u32 ep_state, unsigned int num_trbs, gfp_t mem_flags)
+{
+	/* Make sure the endpoint has been added to xHC schedule */
+	xhci_dbg(xhci, "Endpoint state = 0x%x\n", ep_state);
+	switch (ep_state) {
+	case EP_STATE_DISABLED:
+		/*
+		 * USB core changed config/interfaces without notifying us,
+		 * or hardware is reporting the wrong state.
+		 */
+		xhci_warn(xhci, "WARN urb submitted to disabled ep\n");
+		return -ENOENT;
+	case EP_STATE_HALTED:
+	case EP_STATE_ERROR:
+		xhci_warn(xhci, "WARN waiting for halt or error on ep "
+				"to be cleared\n");
+		/* FIXME event handling code for error needs to clear it */
+		/* XXX not sure if this should be -ENOENT or not */
+		return -EINVAL;
+	case EP_STATE_STOPPED:
+	case EP_STATE_RUNNING:
+		break;
+	default:
+		xhci_err(xhci, "ERROR unknown endpoint state for ep\n");
+		/*
+		 * FIXME issue Configure Endpoint command to try to get the HC
+		 * back into a known state.
+		 */
+		return -EINVAL;
+	}
+	if (!room_on_ring(xhci, ep_ring, num_trbs)) {
+		/* FIXME allocate more room */
+		xhci_err(xhci, "ERROR no room on ep ring\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static int prepare_transfer(struct xhci_hcd *xhci,
+		struct xhci_virt_device *xdev,
+		unsigned int ep_index,
+		unsigned int num_trbs,
+		struct urb *urb,
+		struct xhci_td **td,
+		gfp_t mem_flags)
+{
+	int ret;
+
+	ret = prepare_ring(xhci, xdev->ep_rings[ep_index],
+			xdev->out_ctx->ep[ep_index].ep_info & EP_STATE_MASK,
+			num_trbs, mem_flags);
+	if (ret)
+		return ret;
+	*td = kzalloc(sizeof(struct xhci_td), mem_flags);
+	if (!*td)
+		return -ENOMEM;
+	INIT_LIST_HEAD(&(*td)->td_list);
+	INIT_LIST_HEAD(&(*td)->cancelled_td_list);
+
+	ret = usb_hcd_link_urb_to_ep(xhci_to_hcd(xhci), urb);
+	if (unlikely(ret)) {
+		kfree(*td);
+		return ret;
+	}
+
+	(*td)->urb = urb;
+	urb->hcpriv = (void *) (*td);
+	/* Add this TD to the tail of the endpoint ring's TD list */
+	list_add_tail(&(*td)->td_list, &xdev->ep_rings[ep_index]->td_list);
+	(*td)->start_seg = xdev->ep_rings[ep_index]->enq_seg;
+	(*td)->first_trb = xdev->ep_rings[ep_index]->enqueue;
+
+	return 0;
+}
+
+static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb)
+{
+	int num_sgs, num_trbs, running_total, temp, i;
+	struct scatterlist *sg;
+
+	sg = NULL;
+	num_sgs = urb->num_sgs;
+	temp = urb->transfer_buffer_length;
+
+	xhci_dbg(xhci, "count sg list trbs: \n");
+	num_trbs = 0;
+	for_each_sg(urb->sg->sg, sg, num_sgs, i) {
+		unsigned int previous_total_trbs = num_trbs;
+		unsigned int len = sg_dma_len(sg);
+
+		/* Scatter gather list entries may cross 64KB boundaries */
+		running_total = TRB_MAX_BUFF_SIZE -
+			(sg_dma_address(sg) & ((1 << TRB_MAX_BUFF_SHIFT) - 1));
+		if (running_total != 0)
+			num_trbs++;
+
+		/* How many more 64KB chunks to transfer, how many more TRBs? */
+		while (running_total < sg_dma_len(sg)) {
+			num_trbs++;
+			running_total += TRB_MAX_BUFF_SIZE;
+		}
+		xhci_dbg(xhci, " sg #%d: dma = %#llx, len = %#x (%d), num_trbs = %d\n",
+				i, (unsigned long long)sg_dma_address(sg),
+				len, len, num_trbs - previous_total_trbs);
+
+		len = min_t(int, len, temp);
+		temp -= len;
+		if (temp == 0)
+			break;
+	}
+	xhci_dbg(xhci, "\n");
+	if (!in_interrupt())
+		dev_dbg(&urb->dev->dev, "ep %#x - urb len = %d, sglist used, num_trbs = %d\n",
+				urb->ep->desc.bEndpointAddress,
+				urb->transfer_buffer_length,
+				num_trbs);
+	return num_trbs;
+}
+
+static void check_trb_math(struct urb *urb, int num_trbs, int running_total)
+{
+	if (num_trbs != 0)
+		dev_dbg(&urb->dev->dev, "%s - ep %#x - Miscalculated number of "
+				"TRBs, %d left\n", __func__,
+				urb->ep->desc.bEndpointAddress, num_trbs);
+	if (running_total != urb->transfer_buffer_length)
+		dev_dbg(&urb->dev->dev, "%s - ep %#x - Miscalculated tx length, "
+				"queued %#x (%d), asked for %#x (%d)\n",
+				__func__,
+				urb->ep->desc.bEndpointAddress,
+				running_total, running_total,
+				urb->transfer_buffer_length,
+				urb->transfer_buffer_length);
+}
+
+static void giveback_first_trb(struct xhci_hcd *xhci, int slot_id,
+		unsigned int ep_index, int start_cycle,
+		struct xhci_generic_trb *start_trb, struct xhci_td *td)
+{
+	/*
+	 * Pass all the TRBs to the hardware at once and make sure this write
+	 * isn't reordered.
+	 */
+	wmb();
+	start_trb->field[3] |= start_cycle;
+	ring_ep_doorbell(xhci, slot_id, ep_index);
+}
+
+static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
+		struct urb *urb, int slot_id, unsigned int ep_index)
+{
+	struct xhci_ring *ep_ring;
+	unsigned int num_trbs;
+	struct xhci_td *td;
+	struct scatterlist *sg;
+	int num_sgs;
+	int trb_buff_len, this_sg_len, running_total;
+	bool first_trb;
+	u64 addr;
+
+	struct xhci_generic_trb *start_trb;
+	int start_cycle;
+
+	ep_ring = xhci->devs[slot_id]->ep_rings[ep_index];
+	num_trbs = count_sg_trbs_needed(xhci, urb);
+	num_sgs = urb->num_sgs;
+
+	trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id],
+			ep_index, num_trbs, urb, &td, mem_flags);
+	if (trb_buff_len < 0)
+		return trb_buff_len;
+	/*
+	 * Don't give the first TRB to the hardware (by toggling the cycle bit)
+	 * until we've finished creating all the other TRBs.  The ring's cycle
+	 * state may change as we enqueue the other TRBs, so save it too.
+	 */
+	start_trb = &ep_ring->enqueue->generic;
+	start_cycle = ep_ring->cycle_state;
+
+	running_total = 0;
+	/*
+	 * How much data is in the first TRB?
+	 *
+	 * There are three forces at work for TRB buffer pointers and lengths:
+	 * 1. We don't want to walk off the end of this sg-list entry buffer.
+	 * 2. The transfer length that the driver requested may be smaller than
+	 *    the amount of memory allocated for this scatter-gather list.
+	 * 3. TRBs buffers can't cross 64KB boundaries.
+	 */
+	sg = urb->sg->sg;
+	addr = (u64) sg_dma_address(sg);
+	this_sg_len = sg_dma_len(sg);
+	trb_buff_len = TRB_MAX_BUFF_SIZE -
+		(addr & ((1 << TRB_MAX_BUFF_SHIFT) - 1));
+	trb_buff_len = min_t(int, trb_buff_len, this_sg_len);
+	if (trb_buff_len > urb->transfer_buffer_length)
+		trb_buff_len = urb->transfer_buffer_length;
+	xhci_dbg(xhci, "First length to xfer from 1st sglist entry = %u\n",
+			trb_buff_len);
+
+	first_trb = true;
+	/* Queue the first TRB, even if it's zero-length */
+	do {
+		u32 field = 0;
+
+		/* Don't change the cycle bit of the first TRB until later */
+		if (first_trb)
+			first_trb = false;
+		else
+			field |= ep_ring->cycle_state;
+
+		/* Chain all the TRBs together; clear the chain bit in the last
+		 * TRB to indicate it's the last TRB in the chain.
+		 */
+		if (num_trbs > 1) {
+			field |= TRB_CHAIN;
+		} else {
+			/* FIXME - add check for ZERO_PACKET flag before this */
+			td->last_trb = ep_ring->enqueue;
+			field |= TRB_IOC;
+		}
+		xhci_dbg(xhci, " sg entry: dma = %#x, len = %#x (%d), "
+				"64KB boundary at %#x, end dma = %#x\n",
+				(unsigned int) addr, trb_buff_len, trb_buff_len,
+				(unsigned int) (addr + TRB_MAX_BUFF_SIZE) & ~(TRB_MAX_BUFF_SIZE - 1),
+				(unsigned int) addr + trb_buff_len);
+		if (TRB_MAX_BUFF_SIZE -
+				(addr & ((1 << TRB_MAX_BUFF_SHIFT) - 1)) < trb_buff_len) {
+			xhci_warn(xhci, "WARN: sg dma xfer crosses 64KB boundaries!\n");
+			xhci_dbg(xhci, "Next boundary at %#x, end dma = %#x\n",
+					(unsigned int) (addr + TRB_MAX_BUFF_SIZE) & ~(TRB_MAX_BUFF_SIZE - 1),
+					(unsigned int) addr + trb_buff_len);
+		}
+		queue_trb(xhci, ep_ring, false,
+				(u32) addr,
+				(u32) ((u64) addr >> 32),
+				TRB_LEN(trb_buff_len) | TRB_INTR_TARGET(0),
+				/* We always want to know if the TRB was short,
+				 * or we won't get an event when it completes.
+				 * (Unless we use event data TRBs, which are a
+				 * waste of space and HC resources.)
+				 */
+				field | TRB_ISP | TRB_TYPE(TRB_NORMAL));
+		--num_trbs;
+		running_total += trb_buff_len;
+
+		/* Calculate length for next transfer --
+		 * Are we done queueing all the TRBs for this sg entry?
+		 */
+		this_sg_len -= trb_buff_len;
+		if (this_sg_len == 0) {
+			--num_sgs;
+			if (num_sgs == 0)
+				break;
+			sg = sg_next(sg);
+			addr = (u64) sg_dma_address(sg);
+			this_sg_len = sg_dma_len(sg);
+		} else {
+			addr += trb_buff_len;
+		}
+
+		trb_buff_len = TRB_MAX_BUFF_SIZE -
+			(addr & ((1 << TRB_MAX_BUFF_SHIFT) - 1));
+		trb_buff_len = min_t(int, trb_buff_len, this_sg_len);
+		if (running_total + trb_buff_len > urb->transfer_buffer_length)
+			trb_buff_len =
+				urb->transfer_buffer_length - running_total;
+	} while (running_total < urb->transfer_buffer_length);
+
+	check_trb_math(urb, num_trbs, running_total);
+	giveback_first_trb(xhci, slot_id, ep_index, start_cycle, start_trb, td);
+	return 0;
+}
+
+/* This is very similar to what ehci-q.c qtd_fill() does */
+int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
+		struct urb *urb, int slot_id, unsigned int ep_index)
+{
+	struct xhci_ring *ep_ring;
+	struct xhci_td *td;
+	int num_trbs;
+	struct xhci_generic_trb *start_trb;
+	bool first_trb;
+	int start_cycle;
+	u32 field;
+
+	int running_total, trb_buff_len, ret;
+	u64 addr;
+
+	if (urb->sg)
+		return queue_bulk_sg_tx(xhci, mem_flags, urb, slot_id, ep_index);
+
+	ep_ring = xhci->devs[slot_id]->ep_rings[ep_index];
+
+	num_trbs = 0;
+	/* How much data is (potentially) left before the 64KB boundary? */
+	running_total = TRB_MAX_BUFF_SIZE -
+		(urb->transfer_dma & ((1 << TRB_MAX_BUFF_SHIFT) - 1));
+
+	/* If there's some data on this 64KB chunk, or we have to send a
+	 * zero-length transfer, we need at least one TRB
+	 */
+	if (running_total != 0 || urb->transfer_buffer_length == 0)
+		num_trbs++;
+	/* How many more 64KB chunks to transfer, how many more TRBs? */
+	while (running_total < urb->transfer_buffer_length) {
+		num_trbs++;
+		running_total += TRB_MAX_BUFF_SIZE;
+	}
+	/* FIXME: this doesn't deal with URB_ZERO_PACKET - need one more */
+
+	if (!in_interrupt())
+		dev_dbg(&urb->dev->dev, "ep %#x - urb len = %#x (%d), addr = %#llx, num_trbs = %d\n",
+				urb->ep->desc.bEndpointAddress,
+				urb->transfer_buffer_length,
+				urb->transfer_buffer_length,
+				(unsigned long long)urb->transfer_dma,
+				num_trbs);
+
+	ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index,
+			num_trbs, urb, &td, mem_flags);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Don't give the first TRB to the hardware (by toggling the cycle bit)
+	 * until we've finished creating all the other TRBs.  The ring's cycle
+	 * state may change as we enqueue the other TRBs, so save it too.
+	 */
+	start_trb = &ep_ring->enqueue->generic;
+	start_cycle = ep_ring->cycle_state;
+
+	running_total = 0;
+	/* How much data is in the first TRB? */
+	addr = (u64) urb->transfer_dma;
+	trb_buff_len = TRB_MAX_BUFF_SIZE -
+		(urb->transfer_dma & ((1 << TRB_MAX_BUFF_SHIFT) - 1));
+	if (urb->transfer_buffer_length < trb_buff_len)
+		trb_buff_len = urb->transfer_buffer_length;
+
+	first_trb = true;
+
+	/* Queue the first TRB, even if it's zero-length */
+	do {
+		field = 0;
+
+		/* Don't change the cycle bit of the first TRB until later */
+		if (first_trb)
+			first_trb = false;
+		else
+			field |= ep_ring->cycle_state;
+
+		/* Chain all the TRBs together; clear the chain bit in the last
+		 * TRB to indicate it's the last TRB in the chain.
+		 */
+		if (num_trbs > 1) {
+			field |= TRB_CHAIN;
+		} else {
+			/* FIXME - add check for ZERO_PACKET flag before this */
+			td->last_trb = ep_ring->enqueue;
+			field |= TRB_IOC;
+		}
+		queue_trb(xhci, ep_ring, false,
+				(u32) addr,
+				(u32) ((u64) addr >> 32),
+				TRB_LEN(trb_buff_len) | TRB_INTR_TARGET(0),
+				/* We always want to know if the TRB was short,
+				 * or we won't get an event when it completes.
+				 * (Unless we use event data TRBs, which are a
+				 * waste of space and HC resources.)
+				 */
+				field | TRB_ISP | TRB_TYPE(TRB_NORMAL));
+		--num_trbs;
+		running_total += trb_buff_len;
+
+		/* Calculate length for next transfer */
+		addr += trb_buff_len;
+		trb_buff_len = urb->transfer_buffer_length - running_total;
+		if (trb_buff_len > TRB_MAX_BUFF_SIZE)
+			trb_buff_len = TRB_MAX_BUFF_SIZE;
+	} while (running_total < urb->transfer_buffer_length);
+
+	check_trb_math(urb, num_trbs, running_total);
+	giveback_first_trb(xhci, slot_id, ep_index, start_cycle, start_trb, td);
+	return 0;
+}
+
+/* Caller must have locked xhci->lock */
+int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
+		struct urb *urb, int slot_id, unsigned int ep_index)
+{
+	struct xhci_ring *ep_ring;
+	int num_trbs;
+	int ret;
+	struct usb_ctrlrequest *setup;
+	struct xhci_generic_trb *start_trb;
+	int start_cycle;
+	u32 field;
+	struct xhci_td *td;
+
+	ep_ring = xhci->devs[slot_id]->ep_rings[ep_index];
+
+	/*
+	 * Need to copy setup packet into setup TRB, so we can't use the setup
+	 * DMA address.
+	 */
+	if (!urb->setup_packet)
+		return -EINVAL;
+
+	if (!in_interrupt())
+		xhci_dbg(xhci, "Queueing ctrl tx for slot id %d, ep %d\n",
+				slot_id, ep_index);
+	/* 1 TRB for setup, 1 for status */
+	num_trbs = 2;
+	/*
+	 * Don't need to check if we need additional event data and normal TRBs,
+	 * since data in control transfers will never get bigger than 16MB
+	 * XXX: can we get a buffer that crosses 64KB boundaries?
+	 */
+	if (urb->transfer_buffer_length > 0)
+		num_trbs++;
+	ret = prepare_transfer(xhci, xhci->devs[slot_id], ep_index, num_trbs,
+			urb, &td, mem_flags);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * Don't give the first TRB to the hardware (by toggling the cycle bit)
+	 * until we've finished creating all the other TRBs.  The ring's cycle
+	 * state may change as we enqueue the other TRBs, so save it too.
+	 */
+	start_trb = &ep_ring->enqueue->generic;
+	start_cycle = ep_ring->cycle_state;
+
+	/* Queue setup TRB - see section 6.4.1.2.1 */
+	/* FIXME better way to translate setup_packet into two u32 fields? */
+	setup = (struct usb_ctrlrequest *) urb->setup_packet;
+	queue_trb(xhci, ep_ring, false,
+			/* FIXME endianness is probably going to bite my ass here. */
+			setup->bRequestType | setup->bRequest << 8 | setup->wValue << 16,
+			setup->wIndex | setup->wLength << 16,
+			TRB_LEN(8) | TRB_INTR_TARGET(0),
+			/* Immediate data in pointer */
+			TRB_IDT | TRB_TYPE(TRB_SETUP));
+
+	/* If there's data, queue data TRBs */
+	field = 0;
+	if (urb->transfer_buffer_length > 0) {
+		if (setup->bRequestType & USB_DIR_IN)
+			field |= TRB_DIR_IN;
+		queue_trb(xhci, ep_ring, false,
+				lower_32_bits(urb->transfer_dma),
+				upper_32_bits(urb->transfer_dma),
+				TRB_LEN(urb->transfer_buffer_length) | TRB_INTR_TARGET(0),
+				/* Event on short tx */
+				field | TRB_ISP | TRB_TYPE(TRB_DATA) | ep_ring->cycle_state);
+	}
+
+	/* Save the DMA address of the last TRB in the TD */
+	td->last_trb = ep_ring->enqueue;
+
+	/* Queue status TRB - see Table 7 and sections 4.11.2.2 and 6.4.1.2.3 */
+	/* If the device sent data, the status stage is an OUT transfer */
+	if (urb->transfer_buffer_length > 0 && setup->bRequestType & USB_DIR_IN)
+		field = 0;
+	else
+		field = TRB_DIR_IN;
+	queue_trb(xhci, ep_ring, false,
+			0,
+			0,
+			TRB_INTR_TARGET(0),
+			/* Event on completion */
+			field | TRB_IOC | TRB_TYPE(TRB_STATUS) | ep_ring->cycle_state);
+
+	giveback_first_trb(xhci, slot_id, ep_index, start_cycle, start_trb, td);
+	return 0;
+}
+
+/****		Command Ring Operations		****/
+
+/* Generic function for queueing a command TRB on the command ring */
+static int queue_command(struct xhci_hcd *xhci, u32 field1, u32 field2, u32 field3, u32 field4)
+{
+	if (!room_on_ring(xhci, xhci->cmd_ring, 1)) {
+		if (!in_interrupt())
+			xhci_err(xhci, "ERR: No room for command on command ring\n");
+		return -ENOMEM;
+	}
+	queue_trb(xhci, xhci->cmd_ring, false, field1, field2, field3,
+			field4 | xhci->cmd_ring->cycle_state);
+	return 0;
+}
+
+/* Queue a no-op command on the command ring */
+static int queue_cmd_noop(struct xhci_hcd *xhci)
+{
+	return queue_command(xhci, 0, 0, 0, TRB_TYPE(TRB_CMD_NOOP));
+}
+
+/*
+ * Place a no-op command on the command ring to test the command and
+ * event ring.
+ */
+void *xhci_setup_one_noop(struct xhci_hcd *xhci)
+{
+	if (queue_cmd_noop(xhci) < 0)
+		return NULL;
+	xhci->noops_submitted++;
+	return xhci_ring_cmd_db;
+}
+
+/* Queue a slot enable or disable request on the command ring */
+int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id)
+{
+	return queue_command(xhci, 0, 0, 0,
+			TRB_TYPE(trb_type) | SLOT_ID_FOR_TRB(slot_id));
+}
+
+/* Queue an address device command TRB */
+int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
+		u32 slot_id)
+{
+	return queue_command(xhci, in_ctx_ptr, 0, 0,
+			TRB_TYPE(TRB_ADDR_DEV) | SLOT_ID_FOR_TRB(slot_id));
+}
+
+/* Queue a configure endpoint command TRB */
+int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
+		u32 slot_id)
+{
+	return queue_command(xhci, in_ctx_ptr, 0, 0,
+			TRB_TYPE(TRB_CONFIG_EP) | SLOT_ID_FOR_TRB(slot_id));
+}
+
+int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
+		unsigned int ep_index)
+{
+	u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
+	u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
+	u32 type = TRB_TYPE(TRB_STOP_RING);
+
+	return queue_command(xhci, 0, 0, 0,
+			trb_slot_id | trb_ep_index | type);
+}
+
+/* Set Transfer Ring Dequeue Pointer command.
+ * This should not be used for endpoints that have streams enabled.
+ */
+static int queue_set_tr_deq(struct xhci_hcd *xhci, int slot_id,
+		unsigned int ep_index, struct xhci_segment *deq_seg,
+		union xhci_trb *deq_ptr, u32 cycle_state)
+{
+	dma_addr_t addr;
+	u32 trb_slot_id = SLOT_ID_FOR_TRB(slot_id);
+	u32 trb_ep_index = EP_ID_FOR_TRB(ep_index);
+	u32 type = TRB_TYPE(TRB_SET_DEQ);
+
+	addr = xhci_trb_virt_to_dma(deq_seg, deq_ptr);
+	if (addr == 0)
+		xhci_warn(xhci, "WARN Cannot submit Set TR Deq Ptr\n");
+		xhci_warn(xhci, "WARN deq seg = %p, deq pt = %p\n",
+				deq_seg, deq_ptr);
+	return queue_command(xhci, (u32) addr | cycle_state, 0, 0,
+			trb_slot_id | trb_ep_index | type);
+}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
new file mode 100644
index 000000000000..df8778e1cfc6
--- /dev/null
+++ b/drivers/usb/host/xhci.h
@@ -0,0 +1,1155 @@
+/*
+ * xHCI host controller driver
+ *
+ * Copyright (C) 2008 Intel Corp.
+ *
+ * Author: Sarah Sharp
+ * Some code borrowed from the Linux EHCI driver.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __LINUX_XHCI_HCD_H
+#define __LINUX_XHCI_HCD_H
+
+#include <linux/usb.h>
+#include <linux/timer.h>
+
+#include "../core/hcd.h"
+/* Code sharing between pci-quirks and xhci hcd */
+#include	"xhci-ext-caps.h"
+
+/* xHCI PCI Configuration Registers */
+#define XHCI_SBRN_OFFSET	(0x60)
+
+/* Max number of USB devices for any host controller - limit in section 6.1 */
+#define MAX_HC_SLOTS		256
+/* Section 5.3.3 - MaxPorts */
+#define MAX_HC_PORTS		127
+
+/*
+ * xHCI register interface.
+ * This corresponds to the eXtensible Host Controller Interface (xHCI)
+ * Revision 0.95 specification
+ *
+ * Registers should always be accessed with double word or quad word accesses.
+ *
+ * Some xHCI implementations may support 64-bit address pointers.  Registers
+ * with 64-bit address pointers should be written to with dword accesses by
+ * writing the low dword first (ptr[0]), then the high dword (ptr[1]) second.
+ * xHCI implementations that do not support 64-bit address pointers will ignore
+ * the high dword, and write order is irrelevant.
+ */
+
+/**
+ * struct xhci_cap_regs - xHCI Host Controller Capability Registers.
+ * @hc_capbase:		length of the capabilities register and HC version number
+ * @hcs_params1:	HCSPARAMS1 - Structural Parameters 1
+ * @hcs_params2:	HCSPARAMS2 - Structural Parameters 2
+ * @hcs_params3:	HCSPARAMS3 - Structural Parameters 3
+ * @hcc_params:		HCCPARAMS - Capability Parameters
+ * @db_off:		DBOFF - Doorbell array offset
+ * @run_regs_off:	RTSOFF - Runtime register space offset
+ */
+struct xhci_cap_regs {
+	u32	hc_capbase;
+	u32	hcs_params1;
+	u32	hcs_params2;
+	u32	hcs_params3;
+	u32	hcc_params;
+	u32	db_off;
+	u32	run_regs_off;
+	/* Reserved up to (CAPLENGTH - 0x1C) */
+} __attribute__ ((packed));
+
+/* hc_capbase bitmasks */
+/* bits 7:0 - how long is the Capabilities register */
+#define HC_LENGTH(p)		XHCI_HC_LENGTH(p)
+/* bits 31:16	*/
+#define HC_VERSION(p)		(((p) >> 16) & 0xffff)
+
+/* HCSPARAMS1 - hcs_params1 - bitmasks */
+/* bits 0:7, Max Device Slots */
+#define HCS_MAX_SLOTS(p)	(((p) >> 0) & 0xff)
+#define HCS_SLOTS_MASK		0xff
+/* bits 8:18, Max Interrupters */
+#define HCS_MAX_INTRS(p)	(((p) >> 8) & 0x7ff)
+/* bits 24:31, Max Ports - max value is 0x7F = 127 ports */
+#define HCS_MAX_PORTS(p)	(((p) >> 24) & 0x7f)
+
+/* HCSPARAMS2 - hcs_params2 - bitmasks */
+/* bits 0:3, frames or uframes that SW needs to queue transactions
+ * ahead of the HW to meet periodic deadlines */
+#define HCS_IST(p)		(((p) >> 0) & 0xf)
+/* bits 4:7, max number of Event Ring segments */
+#define HCS_ERST_MAX(p)		(((p) >> 4) & 0xf)
+/* bit 26 Scratchpad restore - for save/restore HW state - not used yet */
+/* bits 27:31 number of Scratchpad buffers SW must allocate for the HW */
+
+/* HCSPARAMS3 - hcs_params3 - bitmasks */
+/* bits 0:7, Max U1 to U0 latency for the roothub ports */
+#define HCS_U1_LATENCY(p)	(((p) >> 0) & 0xff)
+/* bits 16:31, Max U2 to U0 latency for the roothub ports */
+#define HCS_U2_LATENCY(p)	(((p) >> 16) & 0xffff)
+
+/* HCCPARAMS - hcc_params - bitmasks */
+/* true: HC can use 64-bit address pointers */
+#define HCC_64BIT_ADDR(p)	((p) & (1 << 0))
+/* true: HC can do bandwidth negotiation */
+#define HCC_BANDWIDTH_NEG(p)	((p) & (1 << 1))
+/* true: HC uses 64-byte Device Context structures
+ * FIXME 64-byte context structures aren't supported yet.
+ */
+#define HCC_64BYTE_CONTEXT(p)	((p) & (1 << 2))
+/* true: HC has port power switches */
+#define HCC_PPC(p)		((p) & (1 << 3))
+/* true: HC has port indicators */
+#define HCS_INDICATOR(p)	((p) & (1 << 4))
+/* true: HC has Light HC Reset Capability */
+#define HCC_LIGHT_RESET(p)	((p) & (1 << 5))
+/* true: HC supports latency tolerance messaging */
+#define HCC_LTC(p)		((p) & (1 << 6))
+/* true: no secondary Stream ID Support */
+#define HCC_NSS(p)		((p) & (1 << 7))
+/* Max size for Primary Stream Arrays - 2^(n+1), where n is bits 12:15 */
+#define HCC_MAX_PSA		(1 << ((((p) >> 12) & 0xf) + 1))
+/* Extended Capabilities pointer from PCI base - section 5.3.6 */
+#define HCC_EXT_CAPS(p)		XHCI_HCC_EXT_CAPS(p)
+
+/* db_off bitmask - bits 0:1 reserved */
+#define	DBOFF_MASK	(~0x3)
+
+/* run_regs_off bitmask - bits 0:4 reserved */
+#define	RTSOFF_MASK	(~0x1f)
+
+
+/* Number of registers per port */
+#define	NUM_PORT_REGS	4
+
+/**
+ * struct xhci_op_regs - xHCI Host Controller Operational Registers.
+ * @command:		USBCMD - xHC command register
+ * @status:		USBSTS - xHC status register
+ * @page_size:		This indicates the page size that the host controller
+ * 			supports.  If bit n is set, the HC supports a page size
+ * 			of 2^(n+12), up to a 128MB page size.
+ * 			4K is the minimum page size.
+ * @cmd_ring:		CRP - 64-bit Command Ring Pointer
+ * @dcbaa_ptr:		DCBAAP - 64-bit Device Context Base Address Array Pointer
+ * @config_reg:		CONFIG - Configure Register
+ * @port_status_base:	PORTSCn - base address for Port Status and Control
+ * 			Each port has a Port Status and Control register,
+ * 			followed by a Port Power Management Status and Control
+ * 			register, a Port Link Info register, and a reserved
+ * 			register.
+ * @port_power_base:	PORTPMSCn - base address for
+ * 			Port Power Management Status and Control
+ * @port_link_base:	PORTLIn - base address for Port Link Info (current
+ * 			Link PM state and control) for USB 2.1 and USB 3.0
+ * 			devices.
+ */
+struct xhci_op_regs {
+	u32	command;
+	u32	status;
+	u32	page_size;
+	u32	reserved1;
+	u32	reserved2;
+	u32	dev_notification;
+	u32	cmd_ring[2];
+	/* rsvd: offset 0x20-2F */
+	u32	reserved3[4];
+	u32	dcbaa_ptr[2];
+	u32	config_reg;
+	/* rsvd: offset 0x3C-3FF */
+	u32	reserved4[241];
+	/* port 1 registers, which serve as a base address for other ports */
+	u32	port_status_base;
+	u32	port_power_base;
+	u32	port_link_base;
+	u32	reserved5;
+	/* registers for ports 2-255 */
+	u32	reserved6[NUM_PORT_REGS*254];
+} __attribute__ ((packed));
+
+/* USBCMD - USB command - command bitmasks */
+/* start/stop HC execution - do not write unless HC is halted*/
+#define CMD_RUN		XHCI_CMD_RUN
+/* Reset HC - resets internal HC state machine and all registers (except
+ * PCI config regs).  HC does NOT drive a USB reset on the downstream ports.
+ * The xHCI driver must reinitialize the xHC after setting this bit.
+ */
+#define CMD_RESET	(1 << 1)
+/* Event Interrupt Enable - a '1' allows interrupts from the host controller */
+#define CMD_EIE		XHCI_CMD_EIE
+/* Host System Error Interrupt Enable - get out-of-band signal for HC errors */
+#define CMD_HSEIE	XHCI_CMD_HSEIE
+/* bits 4:6 are reserved (and should be preserved on writes). */
+/* light reset (port status stays unchanged) - reset completed when this is 0 */
+#define CMD_LRESET	(1 << 7)
+/* FIXME: ignoring host controller save/restore state for now. */
+#define CMD_CSS		(1 << 8)
+#define CMD_CRS		(1 << 9)
+/* Enable Wrap Event - '1' means xHC generates an event when MFINDEX wraps. */
+#define CMD_EWE		XHCI_CMD_EWE
+/* MFINDEX power management - '1' means xHC can stop MFINDEX counter if all root
+ * hubs are in U3 (selective suspend), disconnect, disabled, or powered-off.
+ * '0' means the xHC can power it off if all ports are in the disconnect,
+ * disabled, or powered-off state.
+ */
+#define CMD_PM_INDEX	(1 << 11)
+/* bits 12:31 are reserved (and should be preserved on writes). */
+
+/* USBSTS - USB status - status bitmasks */
+/* HC not running - set to 1 when run/stop bit is cleared. */
+#define STS_HALT	XHCI_STS_HALT
+/* serious error, e.g. PCI parity error.  The HC will clear the run/stop bit. */
+#define STS_FATAL	(1 << 2)
+/* event interrupt - clear this prior to clearing any IP flags in IR set*/
+#define STS_EINT	(1 << 3)
+/* port change detect */
+#define STS_PORT	(1 << 4)
+/* bits 5:7 reserved and zeroed */
+/* save state status - '1' means xHC is saving state */
+#define STS_SAVE	(1 << 8)
+/* restore state status - '1' means xHC is restoring state */
+#define STS_RESTORE	(1 << 9)
+/* true: save or restore error */
+#define STS_SRE		(1 << 10)
+/* true: Controller Not Ready to accept doorbell or op reg writes after reset */
+#define STS_CNR		XHCI_STS_CNR
+/* true: internal Host Controller Error - SW needs to reset and reinitialize */
+#define STS_HCE		(1 << 12)
+/* bits 13:31 reserved and should be preserved */
+
+/*
+ * DNCTRL - Device Notification Control Register - dev_notification bitmasks
+ * Generate a device notification event when the HC sees a transaction with a
+ * notification type that matches a bit set in this bit field.
+ */
+#define	DEV_NOTE_MASK		(0xffff)
+#define ENABLE_DEV_NOTE(x)	(1 << x)
+/* Most of the device notification types should only be used for debug.
+ * SW does need to pay attention to function wake notifications.
+ */
+#define	DEV_NOTE_FWAKE		ENABLE_DEV_NOTE(1)
+
+/* CRCR - Command Ring Control Register - cmd_ring bitmasks */
+/* bit 0 is the command ring cycle state */
+/* stop ring operation after completion of the currently executing command */
+#define CMD_RING_PAUSE		(1 << 1)
+/* stop ring immediately - abort the currently executing command */
+#define CMD_RING_ABORT		(1 << 2)
+/* true: command ring is running */
+#define CMD_RING_RUNNING	(1 << 3)
+/* bits 4:5 reserved and should be preserved */
+/* Command Ring pointer - bit mask for the lower 32 bits. */
+#define CMD_RING_ADDR_MASK	(0xffffffc0)
+
+/* CONFIG - Configure Register - config_reg bitmasks */
+/* bits 0:7 - maximum number of device slots enabled (NumSlotsEn) */
+#define MAX_DEVS(p)	((p) & 0xff)
+/* bits 8:31 - reserved and should be preserved */
+
+/* PORTSC - Port Status and Control Register - port_status_base bitmasks */
+/* true: device connected */
+#define PORT_CONNECT	(1 << 0)
+/* true: port enabled */
+#define PORT_PE		(1 << 1)
+/* bit 2 reserved and zeroed */
+/* true: port has an over-current condition */
+#define PORT_OC		(1 << 3)
+/* true: port reset signaling asserted */
+#define PORT_RESET	(1 << 4)
+/* Port Link State - bits 5:8
+ * A read gives the current link PM state of the port,
+ * a write with Link State Write Strobe set sets the link state.
+ */
+/* true: port has power (see HCC_PPC) */
+#define PORT_POWER	(1 << 9)
+/* bits 10:13 indicate device speed:
+ * 0 - undefined speed - port hasn't be initialized by a reset yet
+ * 1 - full speed
+ * 2 - low speed
+ * 3 - high speed
+ * 4 - super speed
+ * 5-15 reserved
+ */
+#define DEV_SPEED_MASK		(0xf << 10)
+#define	XDEV_FS			(0x1 << 10)
+#define	XDEV_LS			(0x2 << 10)
+#define	XDEV_HS			(0x3 << 10)
+#define	XDEV_SS			(0x4 << 10)
+#define DEV_UNDEFSPEED(p)	(((p) & DEV_SPEED_MASK) == (0x0<<10))
+#define DEV_FULLSPEED(p)	(((p) & DEV_SPEED_MASK) == XDEV_FS)
+#define DEV_LOWSPEED(p)		(((p) & DEV_SPEED_MASK) == XDEV_LS)
+#define DEV_HIGHSPEED(p)	(((p) & DEV_SPEED_MASK) == XDEV_HS)
+#define DEV_SUPERSPEED(p)	(((p) & DEV_SPEED_MASK) == XDEV_SS)
+/* Bits 20:23 in the Slot Context are the speed for the device */
+#define	SLOT_SPEED_FS		(XDEV_FS << 10)
+#define	SLOT_SPEED_LS		(XDEV_LS << 10)
+#define	SLOT_SPEED_HS		(XDEV_HS << 10)
+#define	SLOT_SPEED_SS		(XDEV_SS << 10)
+/* Port Indicator Control */
+#define PORT_LED_OFF	(0 << 14)
+#define PORT_LED_AMBER	(1 << 14)
+#define PORT_LED_GREEN	(2 << 14)
+#define PORT_LED_MASK	(3 << 14)
+/* Port Link State Write Strobe - set this when changing link state */
+#define PORT_LINK_STROBE	(1 << 16)
+/* true: connect status change */
+#define PORT_CSC	(1 << 17)
+/* true: port enable change */
+#define PORT_PEC	(1 << 18)
+/* true: warm reset for a USB 3.0 device is done.  A "hot" reset puts the port
+ * into an enabled state, and the device into the default state.  A "warm" reset
+ * also resets the link, forcing the device through the link training sequence.
+ * SW can also look at the Port Reset register to see when warm reset is done.
+ */
+#define PORT_WRC	(1 << 19)
+/* true: over-current change */
+#define PORT_OCC	(1 << 20)
+/* true: reset change - 1 to 0 transition of PORT_RESET */
+#define PORT_RC		(1 << 21)
+/* port link status change - set on some port link state transitions:
+ *  Transition				Reason
+ *  ------------------------------------------------------------------------------
+ *  - U3 to Resume			Wakeup signaling from a device
+ *  - Resume to Recovery to U0		USB 3.0 device resume
+ *  - Resume to U0			USB 2.0 device resume
+ *  - U3 to Recovery to U0		Software resume of USB 3.0 device complete
+ *  - U3 to U0				Software resume of USB 2.0 device complete
+ *  - U2 to U0				L1 resume of USB 2.1 device complete
+ *  - U0 to U0 (???)			L1 entry rejection by USB 2.1 device
+ *  - U0 to disabled			L1 entry error with USB 2.1 device
+ *  - Any state to inactive		Error on USB 3.0 port
+ */
+#define PORT_PLC	(1 << 22)
+/* port configure error change - port failed to configure its link partner */
+#define PORT_CEC	(1 << 23)
+/* bit 24 reserved */
+/* wake on connect (enable) */
+#define PORT_WKCONN_E	(1 << 25)
+/* wake on disconnect (enable) */
+#define PORT_WKDISC_E	(1 << 26)
+/* wake on over-current (enable) */
+#define PORT_WKOC_E	(1 << 27)
+/* bits 28:29 reserved */
+/* true: device is removable - for USB 3.0 roothub emulation */
+#define PORT_DEV_REMOVE	(1 << 30)
+/* Initiate a warm port reset - complete when PORT_WRC is '1' */
+#define PORT_WR		(1 << 31)
+
+/* Port Power Management Status and Control - port_power_base bitmasks */
+/* Inactivity timer value for transitions into U1, in microseconds.
+ * Timeout can be up to 127us.  0xFF means an infinite timeout.
+ */
+#define PORT_U1_TIMEOUT(p)	((p) & 0xff)
+/* Inactivity timer value for transitions into U2 */
+#define PORT_U2_TIMEOUT(p)	(((p) & 0xff) << 8)
+/* Bits 24:31 for port testing */
+
+
+/**
+ * struct intr_reg - Interrupt Register Set
+ * @irq_pending:	IMAN - Interrupt Management Register.  Used to enable
+ *			interrupts and check for pending interrupts.
+ * @irq_control:	IMOD - Interrupt Moderation Register.
+ * 			Used to throttle interrupts.
+ * @erst_size:		Number of segments in the Event Ring Segment Table (ERST).
+ * @erst_base:		ERST base address.
+ * @erst_dequeue:	Event ring dequeue pointer.
+ *
+ * Each interrupter (defined by a MSI-X vector) has an event ring and an Event
+ * Ring Segment Table (ERST) associated with it.  The event ring is comprised of
+ * multiple segments of the same size.  The HC places events on the ring and
+ * "updates the Cycle bit in the TRBs to indicate to software the current
+ * position of the Enqueue Pointer." The HCD (Linux) processes those events and
+ * updates the dequeue pointer.
+ */
+struct intr_reg {
+	u32	irq_pending;
+	u32	irq_control;
+	u32	erst_size;
+	u32	rsvd;
+	u32	erst_base[2];
+	u32	erst_dequeue[2];
+} __attribute__ ((packed));
+
+/* irq_pending bitmasks */
+#define	ER_IRQ_PENDING(p)	((p) & 0x1)
+/* bits 2:31 need to be preserved */
+/* THIS IS BUGGY - FIXME - IP IS WRITE 1 TO CLEAR */
+#define	ER_IRQ_CLEAR(p)		((p) & 0xfffffffe)
+#define	ER_IRQ_ENABLE(p)	((ER_IRQ_CLEAR(p)) | 0x2)
+#define	ER_IRQ_DISABLE(p)	((ER_IRQ_CLEAR(p)) & ~(0x2))
+
+/* irq_control bitmasks */
+/* Minimum interval between interrupts (in 250ns intervals).  The interval
+ * between interrupts will be longer if there are no events on the event ring.
+ * Default is 4000 (1 ms).
+ */
+#define ER_IRQ_INTERVAL_MASK	(0xffff)
+/* Counter used to count down the time to the next interrupt - HW use only */
+#define ER_IRQ_COUNTER_MASK	(0xffff << 16)
+
+/* erst_size bitmasks */
+/* Preserve bits 16:31 of erst_size */
+#define	ERST_SIZE_MASK		(0xffff << 16)
+
+/* erst_dequeue bitmasks */
+/* Dequeue ERST Segment Index (DESI) - Segment number (or alias)
+ * where the current dequeue pointer lies.  This is an optional HW hint.
+ */
+#define ERST_DESI_MASK		(0x7)
+/* Event Handler Busy (EHB) - is the event ring scheduled to be serviced by
+ * a work queue (or delayed service routine)?
+ */
+#define ERST_EHB		(1 << 3)
+#define ERST_PTR_MASK		(0xf)
+
+/**
+ * struct xhci_run_regs
+ * @microframe_index:
+ * 		MFINDEX - current microframe number
+ *
+ * Section 5.5 Host Controller Runtime Registers:
+ * "Software should read and write these registers using only Dword (32 bit)
+ * or larger accesses"
+ */
+struct xhci_run_regs {
+	u32	microframe_index;
+	u32	rsvd[7];
+	struct intr_reg	ir_set[128];
+} __attribute__ ((packed));
+
+/**
+ * struct doorbell_array
+ *
+ * Section 5.6
+ */
+struct xhci_doorbell_array {
+	u32	doorbell[256];
+} __attribute__ ((packed));
+
+#define	DB_TARGET_MASK		0xFFFFFF00
+#define	DB_STREAM_ID_MASK	0x0000FFFF
+#define	DB_TARGET_HOST		0x0
+#define	DB_STREAM_ID_HOST	0x0
+#define	DB_MASK			(0xff << 8)
+
+/* Endpoint Target - bits 0:7 */
+#define EPI_TO_DB(p)		(((p) + 1) & 0xff)
+
+
+/**
+ * struct xhci_slot_ctx
+ * @dev_info:	Route string, device speed, hub info, and last valid endpoint
+ * @dev_info2:	Max exit latency for device number, root hub port number
+ * @tt_info:	tt_info is used to construct split transaction tokens
+ * @dev_state:	slot state and device address
+ *
+ * Slot Context - section 6.2.1.1.  This assumes the HC uses 32-byte context
+ * structures.  If the HC uses 64-byte contexts, there is an additional 32 bytes
+ * reserved at the end of the slot context for HC internal use.
+ */
+struct xhci_slot_ctx {
+	u32	dev_info;
+	u32	dev_info2;
+	u32	tt_info;
+	u32	dev_state;
+	/* offset 0x10 to 0x1f reserved for HC internal use */
+	u32	reserved[4];
+} __attribute__ ((packed));
+
+/* dev_info bitmasks */
+/* Route String - 0:19 */
+#define ROUTE_STRING_MASK	(0xfffff)
+/* Device speed - values defined by PORTSC Device Speed field - 20:23 */
+#define DEV_SPEED	(0xf << 20)
+/* bit 24 reserved */
+/* Is this LS/FS device connected through a HS hub? - bit 25 */
+#define DEV_MTT		(0x1 << 25)
+/* Set if the device is a hub - bit 26 */
+#define DEV_HUB		(0x1 << 26)
+/* Index of the last valid endpoint context in this device context - 27:31 */
+#define LAST_CTX_MASK	(0x1f << 27)
+#define LAST_CTX(p)	((p) << 27)
+#define LAST_CTX_TO_EP_NUM(p)	(((p) >> 27) - 1)
+#define SLOT_FLAG	(1 << 0)
+#define EP0_FLAG	(1 << 1)
+
+/* dev_info2 bitmasks */
+/* Max Exit Latency (ms) - worst case time to wake up all links in dev path */
+#define MAX_EXIT	(0xffff)
+/* Root hub port number that is needed to access the USB device */
+#define ROOT_HUB_PORT(p)	(((p) & 0xff) << 16)
+
+/* tt_info bitmasks */
+/*
+ * TT Hub Slot ID - for low or full speed devices attached to a high-speed hub
+ * The Slot ID of the hub that isolates the high speed signaling from
+ * this low or full-speed device.  '0' if attached to root hub port.
+ */
+#define TT_SLOT		(0xff)
+/*
+ * The number of the downstream facing port of the high-speed hub
+ * '0' if the device is not low or full speed.
+ */
+#define TT_PORT		(0xff << 8)
+
+/* dev_state bitmasks */
+/* USB device address - assigned by the HC */
+#define DEV_ADDR_MASK	(0xff)
+/* bits 8:26 reserved */
+/* Slot state */
+#define SLOT_STATE	(0x1f << 27)
+#define GET_SLOT_STATE(p)	(((p) & (0x1f << 27)) >> 27)
+
+
+/**
+ * struct xhci_ep_ctx
+ * @ep_info:	endpoint state, streams, mult, and interval information.
+ * @ep_info2:	information on endpoint type, max packet size, max burst size,
+ * 		error count, and whether the HC will force an event for all
+ * 		transactions.
+ * @deq:	64-bit ring dequeue pointer address.  If the endpoint only
+ * 		defines one stream, this points to the endpoint transfer ring.
+ * 		Otherwise, it points to a stream context array, which has a
+ * 		ring pointer for each flow.
+ * @tx_info:
+ * 		Average TRB lengths for the endpoint ring and
+ * 		max payload within an Endpoint Service Interval Time (ESIT).
+ *
+ * Endpoint Context - section 6.2.1.2.  This assumes the HC uses 32-byte context
+ * structures.  If the HC uses 64-byte contexts, there is an additional 32 bytes
+ * reserved at the end of the endpoint context for HC internal use.
+ */
+struct xhci_ep_ctx {
+	u32	ep_info;
+	u32	ep_info2;
+	u32	deq[2];
+	u32	tx_info;
+	/* offset 0x14 - 0x1f reserved for HC internal use */
+	u32	reserved[3];
+} __attribute__ ((packed));
+
+/* ep_info bitmasks */
+/*
+ * Endpoint State - bits 0:2
+ * 0 - disabled
+ * 1 - running
+ * 2 - halted due to halt condition - ok to manipulate endpoint ring
+ * 3 - stopped
+ * 4 - TRB error
+ * 5-7 - reserved
+ */
+#define EP_STATE_MASK		(0xf)
+#define EP_STATE_DISABLED	0
+#define EP_STATE_RUNNING	1
+#define EP_STATE_HALTED		2
+#define EP_STATE_STOPPED	3
+#define EP_STATE_ERROR		4
+/* Mult - Max number of burtst within an interval, in EP companion desc. */
+#define EP_MULT(p)		((p & 0x3) << 8)
+/* bits 10:14 are Max Primary Streams */
+/* bit 15 is Linear Stream Array */
+/* Interval - period between requests to an endpoint - 125u increments. */
+#define EP_INTERVAL(p)		((p & 0xff) << 16)
+
+/* ep_info2 bitmasks */
+/*
+ * Force Event - generate transfer events for all TRBs for this endpoint
+ * This will tell the HC to ignore the IOC and ISP flags (for debugging only).
+ */
+#define	FORCE_EVENT	(0x1)
+#define ERROR_COUNT(p)	(((p) & 0x3) << 1)
+#define EP_TYPE(p)	((p) << 3)
+#define ISOC_OUT_EP	1
+#define BULK_OUT_EP	2
+#define INT_OUT_EP	3
+#define CTRL_EP		4
+#define ISOC_IN_EP	5
+#define BULK_IN_EP	6
+#define INT_IN_EP	7
+/* bit 6 reserved */
+/* bit 7 is Host Initiate Disable - for disabling stream selection */
+#define MAX_BURST(p)	(((p)&0xff) << 8)
+#define MAX_PACKET(p)	(((p)&0xffff) << 16)
+
+
+/**
+ * struct xhci_device_control
+ * Input/Output context; see section 6.2.5.
+ *
+ * @drop_context:	set the bit of the endpoint context you want to disable
+ * @add_context:	set the bit of the endpoint context you want to enable
+ */
+struct xhci_device_control {
+	u32	drop_flags;
+	u32	add_flags;
+	u32	rsvd[6];
+	struct xhci_slot_ctx	slot;
+	struct xhci_ep_ctx	ep[31];
+} __attribute__ ((packed));
+
+/* drop context bitmasks */
+#define	DROP_EP(x)	(0x1 << x)
+/* add context bitmasks */
+#define	ADD_EP(x)	(0x1 << x)
+
+
+struct xhci_virt_device {
+	/*
+	 * Commands to the hardware are passed an "input context" that
+	 * tells the hardware what to change in its data structures.
+	 * The hardware will return changes in an "output context" that
+	 * software must allocate for the hardware.  We need to keep
+	 * track of input and output contexts separately because
+	 * these commands might fail and we don't trust the hardware.
+	 */
+	struct xhci_device_control	*out_ctx;
+	dma_addr_t			out_ctx_dma;
+	/* Used for addressing devices and configuration changes */
+	struct xhci_device_control	*in_ctx;
+	dma_addr_t			in_ctx_dma;
+	/* FIXME when stream support is added */
+	struct xhci_ring		*ep_rings[31];
+	/* Temporary storage in case the configure endpoint command fails and we
+	 * have to restore the device state to the previous state
+	 */
+	struct xhci_ring		*new_ep_rings[31];
+	struct completion		cmd_completion;
+	/* Status of the last command issued for this device */
+	u32				cmd_status;
+};
+
+
+/**
+ * struct xhci_device_context_array
+ * @dev_context_ptr	array of 64-bit DMA addresses for device contexts
+ */
+struct xhci_device_context_array {
+	/* 64-bit device addresses; we only write 32-bit addresses */
+	u32			dev_context_ptrs[2*MAX_HC_SLOTS];
+	/* private xHCD pointers */
+	dma_addr_t	dma;
+} __attribute__ ((packed));
+/* TODO: write function to set the 64-bit device DMA address */
+/*
+ * TODO: change this to be dynamically sized at HC mem init time since the HC
+ * might not be able to handle the maximum number of devices possible.
+ */
+
+
+struct xhci_stream_ctx {
+	/* 64-bit stream ring address, cycle state, and stream type */
+	u32	stream_ring[2];
+	/* offset 0x14 - 0x1f reserved for HC internal use */
+	u32	reserved[2];
+} __attribute__ ((packed));
+
+
+struct xhci_transfer_event {
+	/* 64-bit buffer address, or immediate data */
+	u32	buffer[2];
+	u32	transfer_len;
+	/* This field is interpreted differently based on the type of TRB */
+	u32	flags;
+} __attribute__ ((packed));
+
+/** Transfer Event bit fields **/
+#define	TRB_TO_EP_ID(p)	(((p) >> 16) & 0x1f)
+
+/* Completion Code - only applicable for some types of TRBs */
+#define	COMP_CODE_MASK		(0xff << 24)
+#define GET_COMP_CODE(p)	(((p) & COMP_CODE_MASK) >> 24)
+#define COMP_SUCCESS	1
+/* Data Buffer Error */
+#define COMP_DB_ERR	2
+/* Babble Detected Error */
+#define COMP_BABBLE	3
+/* USB Transaction Error */
+#define COMP_TX_ERR	4
+/* TRB Error - some TRB field is invalid */
+#define COMP_TRB_ERR	5
+/* Stall Error - USB device is stalled */
+#define COMP_STALL	6
+/* Resource Error - HC doesn't have memory for that device configuration */
+#define COMP_ENOMEM	7
+/* Bandwidth Error - not enough room in schedule for this dev config */
+#define COMP_BW_ERR	8
+/* No Slots Available Error - HC ran out of device slots */
+#define COMP_ENOSLOTS	9
+/* Invalid Stream Type Error */
+#define COMP_STREAM_ERR	10
+/* Slot Not Enabled Error - doorbell rung for disabled device slot */
+#define COMP_EBADSLT	11
+/* Endpoint Not Enabled Error */
+#define COMP_EBADEP	12
+/* Short Packet */
+#define COMP_SHORT_TX	13
+/* Ring Underrun - doorbell rung for an empty isoc OUT ep ring */
+#define COMP_UNDERRUN	14
+/* Ring Overrun - isoc IN ep ring is empty when ep is scheduled to RX */
+#define COMP_OVERRUN	15
+/* Virtual Function Event Ring Full Error */
+#define COMP_VF_FULL	16
+/* Parameter Error - Context parameter is invalid */
+#define COMP_EINVAL	17
+/* Bandwidth Overrun Error - isoc ep exceeded its allocated bandwidth */
+#define COMP_BW_OVER	18
+/* Context State Error - illegal context state transition requested */
+#define COMP_CTX_STATE	19
+/* No Ping Response Error - HC didn't get PING_RESPONSE in time to TX */
+#define COMP_PING_ERR	20
+/* Event Ring is full */
+#define COMP_ER_FULL	21
+/* Missed Service Error - HC couldn't service an isoc ep within interval */
+#define COMP_MISSED_INT	23
+/* Successfully stopped command ring */
+#define COMP_CMD_STOP	24
+/* Successfully aborted current command and stopped command ring */
+#define COMP_CMD_ABORT	25
+/* Stopped - transfer was terminated by a stop endpoint command */
+#define COMP_STOP	26
+/* Same as COMP_EP_STOPPED, but the transfered length in the event is invalid */
+#define COMP_STOP_INVAL	27
+/* Control Abort Error - Debug Capability - control pipe aborted */
+#define COMP_DBG_ABORT	28
+/* TRB type 29 and 30 reserved */
+/* Isoc Buffer Overrun - an isoc IN ep sent more data than could fit in TD */
+#define COMP_BUFF_OVER	31
+/* Event Lost Error - xHC has an "internal event overrun condition" */
+#define COMP_ISSUES	32
+/* Undefined Error - reported when other error codes don't apply */
+#define COMP_UNKNOWN	33
+/* Invalid Stream ID Error */
+#define COMP_STRID_ERR	34
+/* Secondary Bandwidth Error - may be returned by a Configure Endpoint cmd */
+/* FIXME - check for this */
+#define COMP_2ND_BW_ERR	35
+/* Split Transaction Error */
+#define	COMP_SPLIT_ERR	36
+
+struct xhci_link_trb {
+	/* 64-bit segment pointer*/
+	u32 segment_ptr[2];
+	u32 intr_target;
+	u32 control;
+} __attribute__ ((packed));
+
+/* control bitfields */
+#define LINK_TOGGLE	(0x1<<1)
+
+/* Command completion event TRB */
+struct xhci_event_cmd {
+	/* Pointer to command TRB, or the value passed by the event data trb */
+	u32 cmd_trb[2];
+	u32 status;
+	u32 flags;
+} __attribute__ ((packed));
+
+/* flags bitmasks */
+/* bits 16:23 are the virtual function ID */
+/* bits 24:31 are the slot ID */
+#define TRB_TO_SLOT_ID(p)	(((p) & (0xff<<24)) >> 24)
+#define SLOT_ID_FOR_TRB(p)	(((p) & 0xff) << 24)
+
+/* Stop Endpoint TRB - ep_index to endpoint ID for this TRB */
+#define TRB_TO_EP_INDEX(p)		((((p) & (0x1f << 16)) >> 16) - 1)
+#define	EP_ID_FOR_TRB(p)		((((p) + 1) & 0x1f) << 16)
+
+
+/* Port Status Change Event TRB fields */
+/* Port ID - bits 31:24 */
+#define GET_PORT_ID(p)		(((p) & (0xff << 24)) >> 24)
+
+/* Normal TRB fields */
+/* transfer_len bitmasks - bits 0:16 */
+#define	TRB_LEN(p)		((p) & 0x1ffff)
+/* TD size - number of bytes remaining in the TD (including this TRB):
+ * bits 17 - 21.  Shift the number of bytes by 10. */
+#define TD_REMAINDER(p)		((((p) >> 10) & 0x1f) << 17)
+/* Interrupter Target - which MSI-X vector to target the completion event at */
+#define TRB_INTR_TARGET(p)	(((p) & 0x3ff) << 22)
+#define GET_INTR_TARGET(p)	(((p) >> 22) & 0x3ff)
+
+/* Cycle bit - indicates TRB ownership by HC or HCD */
+#define TRB_CYCLE		(1<<0)
+/*
+ * Force next event data TRB to be evaluated before task switch.
+ * Used to pass OS data back after a TD completes.
+ */
+#define TRB_ENT			(1<<1)
+/* Interrupt on short packet */
+#define TRB_ISP			(1<<2)
+/* Set PCIe no snoop attribute */
+#define TRB_NO_SNOOP		(1<<3)
+/* Chain multiple TRBs into a TD */
+#define TRB_CHAIN		(1<<4)
+/* Interrupt on completion */
+#define TRB_IOC			(1<<5)
+/* The buffer pointer contains immediate data */
+#define TRB_IDT			(1<<6)
+
+
+/* Control transfer TRB specific fields */
+#define TRB_DIR_IN		(1<<16)
+
+struct xhci_generic_trb {
+	u32 field[4];
+} __attribute__ ((packed));
+
+union xhci_trb {
+	struct xhci_link_trb		link;
+	struct xhci_transfer_event	trans_event;
+	struct xhci_event_cmd		event_cmd;
+	struct xhci_generic_trb		generic;
+};
+
+/* TRB bit mask */
+#define	TRB_TYPE_BITMASK	(0xfc00)
+#define TRB_TYPE(p)		((p) << 10)
+/* TRB type IDs */
+/* bulk, interrupt, isoc scatter/gather, and control data stage */
+#define TRB_NORMAL		1
+/* setup stage for control transfers */
+#define TRB_SETUP		2
+/* data stage for control transfers */
+#define TRB_DATA		3
+/* status stage for control transfers */
+#define TRB_STATUS		4
+/* isoc transfers */
+#define TRB_ISOC		5
+/* TRB for linking ring segments */
+#define TRB_LINK		6
+#define TRB_EVENT_DATA		7
+/* Transfer Ring No-op (not for the command ring) */
+#define TRB_TR_NOOP		8
+/* Command TRBs */
+/* Enable Slot Command */
+#define TRB_ENABLE_SLOT		9
+/* Disable Slot Command */
+#define TRB_DISABLE_SLOT	10
+/* Address Device Command */
+#define TRB_ADDR_DEV		11
+/* Configure Endpoint Command */
+#define TRB_CONFIG_EP		12
+/* Evaluate Context Command */
+#define TRB_EVAL_CONTEXT	13
+/* Reset Transfer Ring Command */
+#define TRB_RESET_RING		14
+/* Stop Transfer Ring Command */
+#define TRB_STOP_RING		15
+/* Set Transfer Ring Dequeue Pointer Command */
+#define TRB_SET_DEQ		16
+/* Reset Device Command */
+#define TRB_RESET_DEV		17
+/* Force Event Command (opt) */
+#define TRB_FORCE_EVENT		18
+/* Negotiate Bandwidth Command (opt) */
+#define TRB_NEG_BANDWIDTH	19
+/* Set Latency Tolerance Value Command (opt) */
+#define TRB_SET_LT		20
+/* Get port bandwidth Command */
+#define TRB_GET_BW		21
+/* Force Header Command - generate a transaction or link management packet */
+#define TRB_FORCE_HEADER	22
+/* No-op Command - not for transfer rings */
+#define TRB_CMD_NOOP		23
+/* TRB IDs 24-31 reserved */
+/* Event TRBS */
+/* Transfer Event */
+#define TRB_TRANSFER		32
+/* Command Completion Event */
+#define TRB_COMPLETION		33
+/* Port Status Change Event */
+#define TRB_PORT_STATUS		34
+/* Bandwidth Request Event (opt) */
+#define TRB_BANDWIDTH_EVENT	35
+/* Doorbell Event (opt) */
+#define TRB_DOORBELL		36
+/* Host Controller Event */
+#define TRB_HC_EVENT		37
+/* Device Notification Event - device sent function wake notification */
+#define TRB_DEV_NOTE		38
+/* MFINDEX Wrap Event - microframe counter wrapped */
+#define TRB_MFINDEX_WRAP	39
+/* TRB IDs 40-47 reserved, 48-63 is vendor-defined */
+
+/*
+ * TRBS_PER_SEGMENT must be a multiple of 4,
+ * since the command ring is 64-byte aligned.
+ * It must also be greater than 16.
+ */
+#define TRBS_PER_SEGMENT	64
+#define SEGMENT_SIZE		(TRBS_PER_SEGMENT*16)
+/* TRB buffer pointers can't cross 64KB boundaries */
+#define TRB_MAX_BUFF_SHIFT		16
+#define TRB_MAX_BUFF_SIZE	(1 << TRB_MAX_BUFF_SHIFT)
+
+struct xhci_segment {
+	union xhci_trb		*trbs;
+	/* private to HCD */
+	struct xhci_segment	*next;
+	dma_addr_t		dma;
+} __attribute__ ((packed));
+
+struct xhci_td {
+	struct list_head	td_list;
+	struct list_head	cancelled_td_list;
+	struct urb		*urb;
+	struct xhci_segment	*start_seg;
+	union xhci_trb		*first_trb;
+	union xhci_trb		*last_trb;
+};
+
+struct xhci_ring {
+	struct xhci_segment	*first_seg;
+	union  xhci_trb		*enqueue;
+	struct xhci_segment	*enq_seg;
+	unsigned int		enq_updates;
+	union  xhci_trb		*dequeue;
+	struct xhci_segment	*deq_seg;
+	unsigned int		deq_updates;
+	struct list_head	td_list;
+	/* ----  Related to URB cancellation ---- */
+	struct list_head	cancelled_td_list;
+	unsigned int		cancels_pending;
+	unsigned int		state;
+#define SET_DEQ_PENDING		(1 << 0)
+	/* The TRB that was last reported in a stopped endpoint ring */
+	union xhci_trb		*stopped_trb;
+	struct xhci_td		*stopped_td;
+	/*
+	 * Write the cycle state into the TRB cycle field to give ownership of
+	 * the TRB to the host controller (if we are the producer), or to check
+	 * if we own the TRB (if we are the consumer).  See section 4.9.1.
+	 */
+	u32			cycle_state;
+};
+
+struct xhci_erst_entry {
+	/* 64-bit event ring segment address */
+	u32	seg_addr[2];
+	u32	seg_size;
+	/* Set to zero */
+	u32	rsvd;
+} __attribute__ ((packed));
+
+struct xhci_erst {
+	struct xhci_erst_entry	*entries;
+	unsigned int		num_entries;
+	/* xhci->event_ring keeps track of segment dma addresses */
+	dma_addr_t		erst_dma_addr;
+	/* Num entries the ERST can contain */
+	unsigned int		erst_size;
+};
+
+/*
+ * Each segment table entry is 4*32bits long.  1K seems like an ok size:
+ * (1K bytes * 8bytes/bit) / (4*32 bits) = 64 segment entries in the table,
+ * meaning 64 ring segments.
+ * Initial allocated size of the ERST, in number of entries */
+#define	ERST_NUM_SEGS	1
+/* Initial allocated size of the ERST, in number of entries */
+#define	ERST_SIZE	64
+/* Initial number of event segment rings allocated */
+#define	ERST_ENTRIES	1
+/* Poll every 60 seconds */
+#define	POLL_TIMEOUT	60
+/* XXX: Make these module parameters */
+
+
+/* There is one ehci_hci structure per controller */
+struct xhci_hcd {
+	/* glue to PCI and HCD framework */
+	struct xhci_cap_regs __iomem *cap_regs;
+	struct xhci_op_regs __iomem *op_regs;
+	struct xhci_run_regs __iomem *run_regs;
+	struct xhci_doorbell_array __iomem *dba;
+	/* Our HCD's current interrupter register set */
+	struct	intr_reg __iomem *ir_set;
+
+	/* Cached register copies of read-only HC data */
+	__u32		hcs_params1;
+	__u32		hcs_params2;
+	__u32		hcs_params3;
+	__u32		hcc_params;
+
+	spinlock_t	lock;
+
+	/* packed release number */
+	u8		sbrn;
+	u16		hci_version;
+	u8		max_slots;
+	u8		max_interrupters;
+	u8		max_ports;
+	u8		isoc_threshold;
+	int		event_ring_max;
+	int		addr_64;
+	/* 4KB min, 128MB max */
+	int		page_size;
+	/* Valid values are 12 to 20, inclusive */
+	int		page_shift;
+	/* only one MSI vector for now, but might need more later */
+	int		msix_count;
+	struct msix_entry	*msix_entries;
+	/* data structures */
+	struct xhci_device_context_array *dcbaa;
+	struct xhci_ring	*cmd_ring;
+	struct xhci_ring	*event_ring;
+	struct xhci_erst	erst;
+	/* slot enabling and address device helpers */
+	struct completion	addr_dev;
+	int slot_id;
+	/* Internal mirror of the HW's dcbaa */
+	struct xhci_virt_device	*devs[MAX_HC_SLOTS];
+
+	/* DMA pools */
+	struct dma_pool	*device_pool;
+	struct dma_pool	*segment_pool;
+
+#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
+	/* Poll the rings - for debugging */
+	struct timer_list	event_ring_timer;
+	int			zombie;
+#endif
+	/* Statistics */
+	int			noops_submitted;
+	int			noops_handled;
+	int			error_bitmask;
+};
+
+/* For testing purposes */
+#define NUM_TEST_NOOPS	0
+
+/* convert between an HCD pointer and the corresponding EHCI_HCD */
+static inline struct xhci_hcd *hcd_to_xhci(struct usb_hcd *hcd)
+{
+	return (struct xhci_hcd *) (hcd->hcd_priv);
+}
+
+static inline struct usb_hcd *xhci_to_hcd(struct xhci_hcd *xhci)
+{
+	return container_of((void *) xhci, struct usb_hcd, hcd_priv);
+}
+
+#ifdef CONFIG_USB_XHCI_HCD_DEBUGGING
+#define XHCI_DEBUG	1
+#else
+#define XHCI_DEBUG	0
+#endif
+
+#define xhci_dbg(xhci, fmt, args...) \
+	do { if (XHCI_DEBUG) dev_dbg(xhci_to_hcd(xhci)->self.controller , fmt , ## args); } while (0)
+#define xhci_info(xhci, fmt, args...) \
+	do { if (XHCI_DEBUG) dev_info(xhci_to_hcd(xhci)->self.controller , fmt , ## args); } while (0)
+#define xhci_err(xhci, fmt, args...) \
+	dev_err(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
+#define xhci_warn(xhci, fmt, args...) \
+	dev_warn(xhci_to_hcd(xhci)->self.controller , fmt , ## args)
+
+/* TODO: copied from ehci.h - can be refactored? */
+/* xHCI spec says all registers are little endian */
+static inline unsigned int xhci_readl(const struct xhci_hcd *xhci,
+		__u32 __iomem *regs)
+{
+	return readl(regs);
+}
+static inline void xhci_writel(struct xhci_hcd *xhci,
+		const unsigned int val, __u32 __iomem *regs)
+{
+	if (!in_interrupt())
+		xhci_dbg(xhci,
+			 "`MEM_WRITE_DWORD(3'b000, 32'h%p, 32'h%0x, 4'hf);\n",
+			 regs, val);
+	writel(val, regs);
+}
+
+/* xHCI debugging */
+void xhci_print_ir_set(struct xhci_hcd *xhci, struct intr_reg *ir_set, int set_num);
+void xhci_print_registers(struct xhci_hcd *xhci);
+void xhci_dbg_regs(struct xhci_hcd *xhci);
+void xhci_print_run_regs(struct xhci_hcd *xhci);
+void xhci_print_trb_offsets(struct xhci_hcd *xhci, union xhci_trb *trb);
+void xhci_debug_trb(struct xhci_hcd *xhci, union xhci_trb *trb);
+void xhci_debug_segment(struct xhci_hcd *xhci, struct xhci_segment *seg);
+void xhci_debug_ring(struct xhci_hcd *xhci, struct xhci_ring *ring);
+void xhci_dbg_erst(struct xhci_hcd *xhci, struct xhci_erst *erst);
+void xhci_dbg_cmd_ptrs(struct xhci_hcd *xhci);
+void xhci_dbg_ring_ptrs(struct xhci_hcd *xhci, struct xhci_ring *ring);
+void xhci_dbg_ctx(struct xhci_hcd *xhci, struct xhci_device_control *ctx, dma_addr_t dma, unsigned int last_ep);
+
+/* xHCI memory managment */
+void xhci_mem_cleanup(struct xhci_hcd *xhci);
+int xhci_mem_init(struct xhci_hcd *xhci, gfp_t flags);
+void xhci_free_virt_device(struct xhci_hcd *xhci, int slot_id);
+int xhci_alloc_virt_device(struct xhci_hcd *xhci, int slot_id, struct usb_device *udev, gfp_t flags);
+int xhci_setup_addressable_virt_dev(struct xhci_hcd *xhci, struct usb_device *udev);
+unsigned int xhci_get_endpoint_index(struct usb_endpoint_descriptor *desc);
+unsigned int xhci_get_endpoint_flag(struct usb_endpoint_descriptor *desc);
+void xhci_endpoint_zero(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_host_endpoint *ep);
+int xhci_endpoint_init(struct xhci_hcd *xhci, struct xhci_virt_device *virt_dev, struct usb_device *udev, struct usb_host_endpoint *ep);
+void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring);
+
+#ifdef CONFIG_PCI
+/* xHCI PCI glue */
+int xhci_register_pci(void);
+void xhci_unregister_pci(void);
+#endif
+
+/* xHCI host controller glue */
+int xhci_halt(struct xhci_hcd *xhci);
+int xhci_reset(struct xhci_hcd *xhci);
+int xhci_init(struct usb_hcd *hcd);
+int xhci_run(struct usb_hcd *hcd);
+void xhci_stop(struct usb_hcd *hcd);
+void xhci_shutdown(struct usb_hcd *hcd);
+int xhci_get_frame(struct usb_hcd *hcd);
+irqreturn_t xhci_irq(struct usb_hcd *hcd);
+int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev);
+void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev);
+int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags);
+int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status);
+int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
+int xhci_drop_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep);
+int xhci_check_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
+void xhci_reset_bandwidth(struct usb_hcd *hcd, struct usb_device *udev);
+
+/* xHCI ring, segment, TRB, and TD functions */
+dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
+void xhci_ring_cmd_db(struct xhci_hcd *xhci);
+void *xhci_setup_one_noop(struct xhci_hcd *xhci);
+void xhci_handle_event(struct xhci_hcd *xhci);
+void xhci_set_hc_event_deq(struct xhci_hcd *xhci);
+int xhci_queue_slot_control(struct xhci_hcd *xhci, u32 trb_type, u32 slot_id);
+int xhci_queue_address_device(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
+		u32 slot_id);
+int xhci_queue_stop_endpoint(struct xhci_hcd *xhci, int slot_id,
+		unsigned int ep_index);
+int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
+		int slot_id, unsigned int ep_index);
+int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags, struct urb *urb,
+		int slot_id, unsigned int ep_index);
+int xhci_queue_configure_endpoint(struct xhci_hcd *xhci, dma_addr_t in_ctx_ptr,
+		u32 slot_id);
+
+/* xHCI roothub code */
+int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
+		char *buf, u16 wLength);
+int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
+
+#endif /* __LINUX_XHCI_HCD_H */
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index 1f715436d6d3..a7eb4c99342c 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -733,7 +733,7 @@ int __init mon_text_init(void)
 {
 	struct dentry *mondir;
 
-	mondir = debugfs_create_dir("usbmon", NULL);
+	mondir = debugfs_create_dir("usbmon", usb_debug_root);
 	if (IS_ERR(mondir)) {
 		printk(KERN_NOTICE TAG ": debugfs is not available\n");
 		return -ENODEV;
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index b66e8544d8b9..70073b157f0a 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -10,6 +10,7 @@ comment "Enable Host or Gadget support to see Inventra options"
 config USB_MUSB_HDRC
 	depends on (USB || USB_GADGET) && HAVE_CLK
 	depends on !SUPERH
+	select NOP_USB_XCEIV if ARCH_DAVINCI
 	select TWL4030_USB if MACH_OMAP_3430SDP
 	select USB_OTG_UTILS
 	tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
@@ -55,6 +56,7 @@ comment "Blackfin high speed USB Support"
 config USB_TUSB6010
 	boolean "TUSB 6010 support"
 	depends on USB_MUSB_HDRC && !USB_MUSB_SOC
+	select NOP_USB_XCEIV
 	default y
 	help
 	  The TUSB 6010 chip, from Texas Instruments, connects a discrete
diff --git a/drivers/usb/musb/blackfin.c b/drivers/usb/musb/blackfin.c
index 786134852092..f2f66ebc7362 100644
--- a/drivers/usb/musb/blackfin.c
+++ b/drivers/usb/musb/blackfin.c
@@ -143,7 +143,7 @@ static void musb_conn_timer_handler(unsigned long _musb)
 	u16 val;
 
 	spin_lock_irqsave(&musb->lock, flags);
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_IDLE:
 	case OTG_STATE_A_WAIT_BCON:
 		/* Start a new session */
@@ -154,7 +154,7 @@ static void musb_conn_timer_handler(unsigned long _musb)
 		val = musb_readw(musb->mregs, MUSB_DEVCTL);
 		if (!(val & MUSB_DEVCTL_BDEVICE)) {
 			gpio_set_value(musb->config->gpio_vrsel, 1);
-			musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
+			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 		} else {
 			gpio_set_value(musb->config->gpio_vrsel, 0);
 
@@ -247,6 +247,11 @@ int __init musb_platform_init(struct musb *musb)
 	}
 	gpio_direction_output(musb->config->gpio_vrsel, 0);
 
+	usb_nop_xceiv_register();
+	musb->xceiv = otg_get_transceiver();
+	if (!musb->xceiv)
+		return -ENODEV;
+
 	if (ANOMALY_05000346) {
 		bfin_write_USB_APHY_CALIB(ANOMALY_05000346_value);
 		SSYNC();
@@ -291,7 +296,7 @@ int __init musb_platform_init(struct musb *musb)
 			musb_conn_timer_handler, (unsigned long) musb);
 	}
 	if (is_peripheral_enabled(musb))
-		musb->xceiv.set_power = bfin_set_power;
+		musb->xceiv->set_power = bfin_set_power;
 
 	musb->isr = blackfin_interrupt;
 
diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index 1976e9b41800..c3577bbbae6c 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -6,6 +6,7 @@
  * The TUSB6020, using VLYNQ, has CPPI that looks much like DaVinci.
  */
 
+#include <linux/platform_device.h>
 #include <linux/usb.h>
 
 #include "musb_core.h"
@@ -1145,17 +1146,27 @@ static bool cppi_rx_scan(struct cppi *cppi, unsigned ch)
 	return completed;
 }
 
-void cppi_completion(struct musb *musb, u32 rx, u32 tx)
+irqreturn_t cppi_interrupt(int irq, void *dev_id)
 {
-	void __iomem		*tibase;
-	int			i, index;
+	struct musb		*musb = dev_id;
 	struct cppi		*cppi;
+	void __iomem		*tibase;
 	struct musb_hw_ep	*hw_ep = NULL;
+	u32			rx, tx;
+	int			i, index;
 
 	cppi = container_of(musb->dma_controller, struct cppi, controller);
 
 	tibase = musb->ctrl_base;
 
+	tx = musb_readl(tibase, DAVINCI_TXCPPI_MASKED_REG);
+	rx = musb_readl(tibase, DAVINCI_RXCPPI_MASKED_REG);
+
+	if (!tx && !rx)
+		return IRQ_NONE;
+
+	DBG(4, "CPPI IRQ Tx%x Rx%x\n", tx, rx);
+
 	/* process TX channels */
 	for (index = 0; tx; tx = tx >> 1, index++) {
 		struct cppi_channel		*tx_ch;
@@ -1273,6 +1284,8 @@ void cppi_completion(struct musb *musb, u32 rx, u32 tx)
 
 	/* write to CPPI EOI register to re-enable interrupts */
 	musb_writel(tibase, DAVINCI_CPPI_EOI_REG, 0);
+
+	return IRQ_HANDLED;
 }
 
 /* Instantiate a software object representing a DMA controller. */
@@ -1280,6 +1293,9 @@ struct dma_controller *__init
 dma_controller_create(struct musb *musb, void __iomem *mregs)
 {
 	struct cppi		*controller;
+	struct device		*dev = musb->controller;
+	struct platform_device	*pdev = to_platform_device(dev);
+	int			irq = platform_get_irq(pdev, 1);
 
 	controller = kzalloc(sizeof *controller, GFP_KERNEL);
 	if (!controller)
@@ -1310,6 +1326,15 @@ dma_controller_create(struct musb *musb, void __iomem *mregs)
 		return NULL;
 	}
 
+	if (irq > 0) {
+		if (request_irq(irq, cppi_interrupt, 0, "cppi-dma", musb)) {
+			dev_err(dev, "request_irq %d failed!\n", irq);
+			dma_controller_destroy(&controller->controller);
+			return NULL;
+		}
+		controller->irq = irq;
+	}
+
 	return &controller->controller;
 }
 
@@ -1322,6 +1347,9 @@ void dma_controller_destroy(struct dma_controller *c)
 
 	cppi = container_of(c, struct cppi, controller);
 
+	if (cppi->irq)
+		free_irq(cppi->irq, cppi->musb);
+
 	/* assert:  caller stopped the controller first */
 	dma_pool_destroy(cppi->pool);
 
diff --git a/drivers/usb/musb/cppi_dma.h b/drivers/usb/musb/cppi_dma.h
index 729b4071787b..8a39de3e6e47 100644
--- a/drivers/usb/musb/cppi_dma.h
+++ b/drivers/usb/musb/cppi_dma.h
@@ -119,6 +119,8 @@ struct cppi {
 	void __iomem			*mregs;		/* Mentor regs */
 	void __iomem			*tibase;	/* TI/CPPI regs */
 
+	int				irq;
+
 	struct cppi_channel		tx[4];
 	struct cppi_channel		rx[4];
 
@@ -127,7 +129,7 @@ struct cppi {
 	struct list_head		tx_complete;
 };
 
-/* irq handling hook */
-extern void cppi_completion(struct musb *, u32 rx, u32 tx);
+/* CPPI IRQ handler */
+extern irqreturn_t cppi_interrupt(int, void *);
 
 #endif				/* end of ifndef _CPPI_DMA_H_ */
diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 10d11ab113ab..180d7daa4099 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -215,7 +215,7 @@ static void otg_timer(unsigned long _musb)
 	DBG(7, "poll devctl %02x (%s)\n", devctl, otg_state_string(musb));
 
 	spin_lock_irqsave(&musb->lock, flags);
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_WAIT_VFALL:
 		/* Wait till VBUS falls below SessionEnd (~0.2V); the 1.3 RTL
 		 * seems to mis-handle session "start" otherwise (or in our
@@ -226,7 +226,7 @@ static void otg_timer(unsigned long _musb)
 			mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
 			break;
 		}
-		musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
+		musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 		musb_writel(musb->ctrl_base, DAVINCI_USB_INT_SET_REG,
 			MUSB_INTR_VBUSERROR << DAVINCI_USB_USBINT_SHIFT);
 		break;
@@ -251,7 +251,7 @@ static void otg_timer(unsigned long _musb)
 		if (devctl & MUSB_DEVCTL_BDEVICE)
 			mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
 		else
-			musb->xceiv.state = OTG_STATE_A_IDLE;
+			musb->xceiv->state = OTG_STATE_A_IDLE;
 		break;
 	default:
 		break;
@@ -265,6 +265,7 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
 	irqreturn_t	retval = IRQ_NONE;
 	struct musb	*musb = __hci;
 	void __iomem	*tibase = musb->ctrl_base;
+	struct cppi	*cppi;
 	u32		tmp;
 
 	spin_lock_irqsave(&musb->lock, flags);
@@ -281,16 +282,9 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
 	/* CPPI interrupts share the same IRQ line, but have their own
 	 * mask, state, "vector", and EOI registers.
 	 */
-	if (is_cppi_enabled()) {
-		u32 cppi_tx = musb_readl(tibase, DAVINCI_TXCPPI_MASKED_REG);
-		u32 cppi_rx = musb_readl(tibase, DAVINCI_RXCPPI_MASKED_REG);
-
-		if (cppi_tx || cppi_rx) {
-			DBG(4, "CPPI IRQ t%x r%x\n", cppi_tx, cppi_rx);
-			cppi_completion(musb, cppi_rx, cppi_tx);
-			retval = IRQ_HANDLED;
-		}
-	}
+	cppi = container_of(musb->dma_controller, struct cppi, controller);
+	if (is_cppi_enabled() && musb->dma_controller && !cppi->irq)
+		retval = cppi_interrupt(irq, __hci);
 
 	/* ack and handle non-CPPI interrupts */
 	tmp = musb_readl(tibase, DAVINCI_USB_INT_SRC_MASKED_REG);
@@ -331,21 +325,21 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
 			 * to stop registering in devctl.
 			 */
 			musb->int_usb &= ~MUSB_INTR_VBUSERROR;
-			musb->xceiv.state = OTG_STATE_A_WAIT_VFALL;
+			musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 			mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
 			WARNING("VBUS error workaround (delay coming)\n");
 		} else if (is_host_enabled(musb) && drvvbus) {
 			musb->is_active = 1;
 			MUSB_HST_MODE(musb);
-			musb->xceiv.default_a = 1;
-			musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
+			musb->xceiv->default_a = 1;
+			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 			portstate(musb->port1_status |= USB_PORT_STAT_POWER);
 			del_timer(&otg_workaround);
 		} else {
 			musb->is_active = 0;
 			MUSB_DEV_MODE(musb);
-			musb->xceiv.default_a = 0;
-			musb->xceiv.state = OTG_STATE_B_IDLE;
+			musb->xceiv->default_a = 0;
+			musb->xceiv->state = OTG_STATE_B_IDLE;
 			portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);
 		}
 
@@ -367,17 +361,12 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
 
 	/* poll for ID change */
 	if (is_otg_enabled(musb)
-			&& musb->xceiv.state == OTG_STATE_B_IDLE)
+			&& musb->xceiv->state == OTG_STATE_B_IDLE)
 		mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
 
 	spin_unlock_irqrestore(&musb->lock, flags);
 
-	/* REVISIT we sometimes get unhandled IRQs
-	 * (e.g. ep0).  not clear why...
-	 */
-	if (retval != IRQ_HANDLED)
-		DBG(5, "unhandled? %08x\n", tmp);
-	return IRQ_HANDLED;
+	return retval;
 }
 
 int musb_platform_set_mode(struct musb *musb, u8 mode)
@@ -391,6 +380,11 @@ int __init musb_platform_init(struct musb *musb)
 	void __iomem	*tibase = musb->ctrl_base;
 	u32		revision;
 
+	usb_nop_xceiv_register();
+	musb->xceiv = otg_get_transceiver();
+	if (!musb->xceiv)
+		return -ENODEV;
+
 	musb->mregs += DAVINCI_BASE_OFFSET;
 
 	clk_enable(musb->clock);
@@ -398,7 +392,7 @@ int __init musb_platform_init(struct musb *musb)
 	/* returns zero if e.g. not clocked */
 	revision = musb_readl(tibase, DAVINCI_USB_VERSION_REG);
 	if (revision == 0)
-		return -ENODEV;
+		goto fail;
 
 	if (is_host_enabled(musb))
 		setup_timer(&otg_workaround, otg_timer, (unsigned long) musb);
@@ -432,6 +426,10 @@ int __init musb_platform_init(struct musb *musb)
 
 	musb->isr = davinci_interrupt;
 	return 0;
+
+fail:
+	usb_nop_xceiv_unregister();
+	return -ENODEV;
 }
 
 int musb_platform_exit(struct musb *musb)
@@ -442,7 +440,7 @@ int musb_platform_exit(struct musb *musb)
 	davinci_source_power(musb, 0 /*off*/, 1);
 
 	/* delay, to avoid problems with module reload */
-	if (is_host_enabled(musb) && musb->xceiv.default_a) {
+	if (is_host_enabled(musb) && musb->xceiv->default_a) {
 		int	maxdelay = 30;
 		u8	devctl, warn = 0;
 
@@ -471,5 +469,7 @@ int musb_platform_exit(struct musb *musb)
 
 	clk_disable(musb->clock);
 
+	usb_nop_xceiv_unregister();
+
 	return 0;
 }
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 4000cf6d1e81..554a414f65d1 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -112,6 +112,7 @@
 #include "davinci.h"
 #endif
 
+#define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
 
 
 unsigned musb_debug;
@@ -267,7 +268,7 @@ void musb_load_testpacket(struct musb *musb)
 
 const char *otg_state_string(struct musb *musb)
 {
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_IDLE:		return "a_idle";
 	case OTG_STATE_A_WAIT_VRISE:	return "a_wait_vrise";
 	case OTG_STATE_A_WAIT_BCON:	return "a_wait_bcon";
@@ -288,12 +289,6 @@ const char *otg_state_string(struct musb *musb)
 #ifdef	CONFIG_USB_MUSB_OTG
 
 /*
- * See also USB_OTG_1-3.pdf 6.6.5 Timers
- * REVISIT: Are the other timers done in the hardware?
- */
-#define TB_ASE0_BRST		100	/* Min 3.125 ms */
-
-/*
  * Handles OTG hnp timeouts, such as b_ase0_brst
  */
 void musb_otg_timer_func(unsigned long data)
@@ -302,16 +297,18 @@ void musb_otg_timer_func(unsigned long data)
 	unsigned long	flags;
 
 	spin_lock_irqsave(&musb->lock, flags);
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_B_WAIT_ACON:
 		DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
 		musb_g_disconnect(musb);
-		musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		musb->is_active = 0;
 		break;
+	case OTG_STATE_A_SUSPEND:
 	case OTG_STATE_A_WAIT_BCON:
-		DBG(1, "HNP: a_wait_bcon timeout; back to a_host\n");
-		musb_hnp_stop(musb);
+		DBG(1, "HNP: %s timeout\n", otg_state_string(musb));
+		musb_set_vbus(musb, 0);
+		musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 		break;
 	default:
 		DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb));
@@ -320,10 +317,8 @@ void musb_otg_timer_func(unsigned long data)
 	spin_unlock_irqrestore(&musb->lock, flags);
 }
 
-static DEFINE_TIMER(musb_otg_timer, musb_otg_timer_func, 0, 0);
-
 /*
- * Stops the B-device HNP state. Caller must take care of locking.
+ * Stops the HNP transition. Caller must take care of locking.
  */
 void musb_hnp_stop(struct musb *musb)
 {
@@ -331,20 +326,17 @@ void musb_hnp_stop(struct musb *musb)
 	void __iomem	*mbase = musb->mregs;
 	u8	reg;
 
-	switch (musb->xceiv.state) {
+	DBG(1, "HNP: stop from %s\n", otg_state_string(musb));
+
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_PERIPHERAL:
-	case OTG_STATE_A_WAIT_VFALL:
-	case OTG_STATE_A_WAIT_BCON:
-		DBG(1, "HNP: Switching back to A-host\n");
 		musb_g_disconnect(musb);
-		musb->xceiv.state = OTG_STATE_A_IDLE;
-		MUSB_HST_MODE(musb);
-		musb->is_active = 0;
+		DBG(1, "HNP: back to %s\n", otg_state_string(musb));
 		break;
 	case OTG_STATE_B_HOST:
 		DBG(1, "HNP: Disabling HR\n");
 		hcd->self.is_b_host = 0;
-		musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		MUSB_DEV_MODE(musb);
 		reg = musb_readb(mbase, MUSB_POWER);
 		reg |= MUSB_POWER_SUSPENDM;
@@ -402,7 +394,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
 		if (devctl & MUSB_DEVCTL_HM) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
-			switch (musb->xceiv.state) {
+			switch (musb->xceiv->state) {
 			case OTG_STATE_A_SUSPEND:
 				/* remote wakeup?  later, GetPortStatus
 				 * will stop RESUME signaling
@@ -425,12 +417,12 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				musb->rh_timer = jiffies
 						+ msecs_to_jiffies(20);
 
-				musb->xceiv.state = OTG_STATE_A_HOST;
+				musb->xceiv->state = OTG_STATE_A_HOST;
 				musb->is_active = 1;
 				usb_hcd_resume_root_hub(musb_to_hcd(musb));
 				break;
 			case OTG_STATE_B_WAIT_ACON:
-				musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 				musb->is_active = 1;
 				MUSB_DEV_MODE(musb);
 				break;
@@ -441,11 +433,11 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			}
 #endif
 		} else {
-			switch (musb->xceiv.state) {
+			switch (musb->xceiv->state) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 			case OTG_STATE_A_SUSPEND:
 				/* possibly DISCONNECT is upcoming */
-				musb->xceiv.state = OTG_STATE_A_HOST;
+				musb->xceiv->state = OTG_STATE_A_HOST;
 				usb_hcd_resume_root_hub(musb_to_hcd(musb));
 				break;
 #endif
@@ -490,7 +482,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 		 */
 		musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
 		musb->ep0_stage = MUSB_EP0_START;
-		musb->xceiv.state = OTG_STATE_A_IDLE;
+		musb->xceiv->state = OTG_STATE_A_IDLE;
 		MUSB_HST_MODE(musb);
 		musb_set_vbus(musb, 1);
 
@@ -516,7 +508,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 		 * REVISIT:  do delays from lots of DEBUG_KERNEL checks
 		 * make trouble here, keeping VBUS < 4.4V ?
 		 */
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 		case OTG_STATE_A_HOST:
 			/* recovery is dicey once we've gotten past the
 			 * initial stages of enumeration, but if VBUS
@@ -594,37 +586,40 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 		if (devctl & MUSB_DEVCTL_LSDEV)
 			musb->port1_status |= USB_PORT_STAT_LOW_SPEED;
 
-		if (hcd->status_urb)
-			usb_hcd_poll_rh_status(hcd);
-		else
-			usb_hcd_resume_root_hub(hcd);
-
-		MUSB_HST_MODE(musb);
-
 		/* indicate new connection to OTG machine */
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 		case OTG_STATE_B_PERIPHERAL:
 			if (int_usb & MUSB_INTR_SUSPEND) {
 				DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
-				musb->xceiv.state = OTG_STATE_B_HOST;
-				hcd->self.is_b_host = 1;
 				int_usb &= ~MUSB_INTR_SUSPEND;
+				goto b_host;
 			} else
 				DBG(1, "CONNECT as b_peripheral???\n");
 			break;
 		case OTG_STATE_B_WAIT_ACON:
-			DBG(1, "HNP: Waiting to switch to b_host state\n");
-			musb->xceiv.state = OTG_STATE_B_HOST;
+			DBG(1, "HNP: CONNECT, now b_host\n");
+b_host:
+			musb->xceiv->state = OTG_STATE_B_HOST;
 			hcd->self.is_b_host = 1;
+			musb->ignore_disconnect = 0;
+			del_timer(&musb->otg_timer);
 			break;
 		default:
 			if ((devctl & MUSB_DEVCTL_VBUS)
 					== (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
-				musb->xceiv.state = OTG_STATE_A_HOST;
+				musb->xceiv->state = OTG_STATE_A_HOST;
 				hcd->self.is_b_host = 0;
 			}
 			break;
 		}
+
+		/* poke the root hub */
+		MUSB_HST_MODE(musb);
+		if (hcd->status_urb)
+			usb_hcd_poll_rh_status(hcd);
+		else
+			usb_hcd_resume_root_hub(hcd);
+
 		DBG(1, "CONNECT (%s) devctl %02x\n",
 				otg_state_string(musb), devctl);
 	}
@@ -650,7 +645,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			}
 		} else if (is_peripheral_capable()) {
 			DBG(1, "BUS RESET as %s\n", otg_state_string(musb));
-			switch (musb->xceiv.state) {
+			switch (musb->xceiv->state) {
 #ifdef CONFIG_USB_OTG
 			case OTG_STATE_A_SUSPEND:
 				/* We need to ignore disconnect on suspend
@@ -661,24 +656,27 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				musb_g_reset(musb);
 				/* FALLTHROUGH */
 			case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
-				DBG(1, "HNP: Setting timer as %s\n",
-						otg_state_string(musb));
-				musb_otg_timer.data = (unsigned long)musb;
-				mod_timer(&musb_otg_timer, jiffies
-					+ msecs_to_jiffies(100));
+				/* never use invalid T(a_wait_bcon) */
+				DBG(1, "HNP: in %s, %d msec timeout\n",
+						otg_state_string(musb),
+						TA_WAIT_BCON(musb));
+				mod_timer(&musb->otg_timer, jiffies
+					+ msecs_to_jiffies(TA_WAIT_BCON(musb)));
 				break;
 			case OTG_STATE_A_PERIPHERAL:
-				musb_hnp_stop(musb);
+				musb->ignore_disconnect = 0;
+				del_timer(&musb->otg_timer);
+				musb_g_reset(musb);
 				break;
 			case OTG_STATE_B_WAIT_ACON:
 				DBG(1, "HNP: RESET (%s), to b_peripheral\n",
 					otg_state_string(musb));
-				musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 				musb_g_reset(musb);
 				break;
 #endif
 			case OTG_STATE_B_IDLE:
-				musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 				/* FALLTHROUGH */
 			case OTG_STATE_B_PERIPHERAL:
 				musb_g_reset(musb);
@@ -763,7 +761,7 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
 				MUSB_MODE(musb), devctl);
 		handled = IRQ_HANDLED;
 
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 		case OTG_STATE_A_HOST:
 		case OTG_STATE_A_SUSPEND:
@@ -776,7 +774,16 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
 #endif	/* HOST */
 #ifdef CONFIG_USB_MUSB_OTG
 		case OTG_STATE_B_HOST:
-			musb_hnp_stop(musb);
+			/* REVISIT this behaves for "real disconnect"
+			 * cases; make sure the other transitions from
+			 * from B_HOST act right too.  The B_HOST code
+			 * in hnp_stop() is currently not used...
+			 */
+			musb_root_disconnect(musb);
+			musb_to_hcd(musb)->self.is_b_host = 0;
+			musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
+			MUSB_DEV_MODE(musb);
+			musb_g_disconnect(musb);
 			break;
 		case OTG_STATE_A_PERIPHERAL:
 			musb_hnp_stop(musb);
@@ -805,26 +812,35 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
 				otg_state_string(musb), devctl, power);
 		handled = IRQ_HANDLED;
 
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 #ifdef	CONFIG_USB_MUSB_OTG
 		case OTG_STATE_A_PERIPHERAL:
-			/*
-			 * We cannot stop HNP here, devctl BDEVICE might be
-			 * still set.
+			/* We also come here if the cable is removed, since
+			 * this silicon doesn't report ID-no-longer-grounded.
+			 *
+			 * We depend on T(a_wait_bcon) to shut us down, and
+			 * hope users don't do anything dicey during this
+			 * undesired detour through A_WAIT_BCON.
 			 */
+			musb_hnp_stop(musb);
+			usb_hcd_resume_root_hub(musb_to_hcd(musb));
+			musb_root_disconnect(musb);
+			musb_platform_try_idle(musb, jiffies
+					+ msecs_to_jiffies(musb->a_wait_bcon
+						? : OTG_TIME_A_WAIT_BCON));
 			break;
 #endif
 		case OTG_STATE_B_PERIPHERAL:
 			musb_g_suspend(musb);
 			musb->is_active = is_otg_enabled(musb)
-					&& musb->xceiv.gadget->b_hnp_enable;
+					&& musb->xceiv->gadget->b_hnp_enable;
 			if (musb->is_active) {
 #ifdef	CONFIG_USB_MUSB_OTG
-				musb->xceiv.state = OTG_STATE_B_WAIT_ACON;
+				musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
 				DBG(1, "HNP: Setting timer for b_ase0_brst\n");
-				musb_otg_timer.data = (unsigned long)musb;
-				mod_timer(&musb_otg_timer, jiffies
-					+ msecs_to_jiffies(TB_ASE0_BRST));
+				mod_timer(&musb->otg_timer, jiffies
+					+ msecs_to_jiffies(
+							OTG_TIME_B_ASE0_BRST));
 #endif
 			}
 			break;
@@ -834,9 +850,9 @@ static irqreturn_t musb_stage2_irq(struct musb *musb, u8 int_usb,
 					+ msecs_to_jiffies(musb->a_wait_bcon));
 			break;
 		case OTG_STATE_A_HOST:
-			musb->xceiv.state = OTG_STATE_A_SUSPEND;
+			musb->xceiv->state = OTG_STATE_A_SUSPEND;
 			musb->is_active = is_otg_enabled(musb)
-					&& musb->xceiv.host->b_hnp_enable;
+					&& musb->xceiv->host->b_hnp_enable;
 			break;
 		case OTG_STATE_B_HOST:
 			/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
@@ -1068,14 +1084,13 @@ static struct fifo_cfg __initdata mode_4_cfg[] = {
 { .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket = 512, },
 { .hw_ep_num =  9, .style = FIFO_TX,   .maxpacket = 512, },
 { .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_TX,   .maxpacket = 512, },
-{ .hw_ep_num = 13, .style = FIFO_RX,   .maxpacket = 512, },
+{ .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 64, },
+{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 64, },
+{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 256, },
+{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 64, },
+{ .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
 { .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
 { .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
 };
@@ -1335,11 +1350,11 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
 	}
 	if (reg & MUSB_CONFIGDATA_HBRXE) {
 		strcat(aInfo, ", HB-ISO Rx");
-		strcat(aInfo, " (X)");		/* no driver support */
+		musb->hb_iso_rx = true;
 	}
 	if (reg & MUSB_CONFIGDATA_HBTXE) {
 		strcat(aInfo, ", HB-ISO Tx");
-		strcat(aInfo, " (X)");		/* no driver support */
+		musb->hb_iso_tx = true;
 	}
 	if (reg & MUSB_CONFIGDATA_SOFTCONE)
 		strcat(aInfo, ", SoftConn");
@@ -1481,13 +1496,7 @@ static irqreturn_t generic_interrupt(int irq, void *__hci)
 
 	spin_unlock_irqrestore(&musb->lock, flags);
 
-	/* REVISIT we sometimes get spurious IRQs on g_ep0
-	 * not clear why...
-	 */
-	if (retval != IRQ_HANDLED)
-		DBG(5, "spurious?\n");
-
-	return IRQ_HANDLED;
+	return retval;
 }
 
 #else
@@ -1687,8 +1696,9 @@ musb_vbus_store(struct device *dev, struct device_attribute *attr,
 	}
 
 	spin_lock_irqsave(&musb->lock, flags);
-	musb->a_wait_bcon = val;
-	if (musb->xceiv.state == OTG_STATE_A_WAIT_BCON)
+	/* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
+	musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
+	if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
 		musb->is_active = 0;
 	musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
 	spin_unlock_irqrestore(&musb->lock, flags);
@@ -1706,10 +1716,13 @@ musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
 
 	spin_lock_irqsave(&musb->lock, flags);
 	val = musb->a_wait_bcon;
+	/* FIXME get_vbus_status() is normally #defined as false...
+	 * and is effectively TUSB-specific.
+	 */
 	vbus = musb_platform_get_vbus_status(musb);
 	spin_unlock_irqrestore(&musb->lock, flags);
 
-	return sprintf(buf, "Vbus %s, timeout %lu\n",
+	return sprintf(buf, "Vbus %s, timeout %lu msec\n",
 			vbus ? "on" : "off", val);
 }
 static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);
@@ -1749,8 +1762,8 @@ static void musb_irq_work(struct work_struct *data)
 	struct musb *musb = container_of(data, struct musb, irq_work);
 	static int old_state;
 
-	if (musb->xceiv.state != old_state) {
-		old_state = musb->xceiv.state;
+	if (musb->xceiv->state != old_state) {
+		old_state = musb->xceiv->state;
 		sysfs_notify(&musb->controller->kobj, NULL, "mode");
 	}
 }
@@ -1782,6 +1795,7 @@ allocate_instance(struct device *dev,
 	hcd->uses_new_polling = 1;
 
 	musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
+	musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
 #else
 	musb = kzalloc(sizeof *musb, GFP_KERNEL);
 	if (!musb)
@@ -1847,7 +1861,7 @@ static void musb_free(struct musb *musb)
 	}
 
 #ifdef CONFIG_USB_MUSB_OTG
-	put_device(musb->xceiv.dev);
+	put_device(musb->xceiv->dev);
 #endif
 
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
@@ -1928,10 +1942,18 @@ bad_config:
 		}
 	}
 
-	/* assume vbus is off */
-
-	/* platform adjusts musb->mregs and musb->isr if needed,
-	 * and activates clocks
+	/* The musb_platform_init() call:
+	 *   - adjusts musb->mregs and musb->isr if needed,
+	 *   - may initialize an integrated tranceiver
+	 *   - initializes musb->xceiv, usually by otg_get_transceiver()
+	 *   - activates clocks.
+	 *   - stops powering VBUS
+	 *   - assigns musb->board_set_vbus if host mode is enabled
+	 *
+	 * There are various transciever configurations.  Blackfin,
+	 * DaVinci, TUSB60x0, and others integrate them.  OMAP3 uses
+	 * external/discrete ones in various flavors (twl4030 family,
+	 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
 	 */
 	musb->isr = generic_interrupt;
 	status = musb_platform_init(musb);
@@ -1968,6 +1990,10 @@ bad_config:
 	if (status < 0)
 		goto fail2;
 
+#ifdef CONFIG_USB_OTG
+	setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
+#endif
+
 	/* Init IRQ workqueue before request_irq */
 	INIT_WORK(&musb->irq_work, musb_irq_work);
 
@@ -1999,17 +2025,17 @@ bad_config:
 				? "DMA" : "PIO",
 			musb->nIrq);
 
-#ifdef CONFIG_USB_MUSB_HDRC_HCD
-	/* host side needs more setup, except for no-host modes */
-	if (musb->board_mode != MUSB_PERIPHERAL) {
+	/* host side needs more setup */
+	if (is_host_enabled(musb)) {
 		struct usb_hcd	*hcd = musb_to_hcd(musb);
 
-		if (musb->board_mode == MUSB_OTG)
+		otg_set_host(musb->xceiv, &hcd->self);
+
+		if (is_otg_enabled(musb))
 			hcd->self.otg_port = 1;
-		musb->xceiv.host = &hcd->self;
+		musb->xceiv->host = &hcd->self;
 		hcd->power_budget = 2 * (plat->power ? : 250);
 	}
-#endif				/* CONFIG_USB_MUSB_HDRC_HCD */
 
 	/* For the host-only role, we can activate right away.
 	 * (We expect the ID pin to be forcibly grounded!!)
@@ -2017,8 +2043,8 @@ bad_config:
 	 */
 	if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
 		MUSB_HST_MODE(musb);
-		musb->xceiv.default_a = 1;
-		musb->xceiv.state = OTG_STATE_A_IDLE;
+		musb->xceiv->default_a = 1;
+		musb->xceiv->state = OTG_STATE_A_IDLE;
 
 		status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
 		if (status)
@@ -2033,8 +2059,8 @@ bad_config:
 
 	} else /* peripheral is enabled */ {
 		MUSB_DEV_MODE(musb);
-		musb->xceiv.default_a = 0;
-		musb->xceiv.state = OTG_STATE_B_IDLE;
+		musb->xceiv->default_a = 0;
+		musb->xceiv->state = OTG_STATE_B_IDLE;
 
 		status = musb_gadget_setup(musb);
 		if (status)
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index efb39b5e55b5..f3772ca3b2cf 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -40,6 +40,7 @@
 #include <linux/interrupt.h>
 #include <linux/smp_lock.h>
 #include <linux/errno.h>
+#include <linux/timer.h>
 #include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/usb/ch9.h>
@@ -171,7 +172,8 @@ enum musb_h_ep0_state {
 
 /* peripheral side ep0 states */
 enum musb_g_ep0_state {
-	MUSB_EP0_STAGE_SETUP,		/* idle, waiting for setup */
+	MUSB_EP0_STAGE_IDLE,		/* idle, waiting for SETUP */
+	MUSB_EP0_STAGE_SETUP,		/* received SETUP */
 	MUSB_EP0_STAGE_TX,		/* IN data */
 	MUSB_EP0_STAGE_RX,		/* OUT data */
 	MUSB_EP0_STAGE_STATUSIN,	/* (after OUT data) */
@@ -179,10 +181,15 @@ enum musb_g_ep0_state {
 	MUSB_EP0_STAGE_ACKWAIT,		/* after zlp, before statusin */
 } __attribute__ ((packed));
 
-/* OTG protocol constants */
+/*
+ * OTG protocol constants.  See USB OTG 1.3 spec,
+ * sections 5.5 "Device Timings" and 6.6.5 "Timers".
+ */
 #define OTG_TIME_A_WAIT_VRISE	100		/* msec (max) */
-#define OTG_TIME_A_WAIT_BCON	0		/* 0=infinite; min 1000 msec */
-#define OTG_TIME_A_IDLE_BDIS	200		/* msec (min) */
+#define OTG_TIME_A_WAIT_BCON	1100		/* min 1 second */
+#define OTG_TIME_A_AIDL_BDIS	200		/* min 200 msec */
+#define OTG_TIME_B_ASE0_BRST	100		/* min 3.125 ms */
+
 
 /*************************** REGISTER ACCESS ********************************/
 
@@ -331,6 +338,8 @@ struct musb {
 	struct list_head	control;	/* of musb_qh */
 	struct list_head	in_bulk;	/* of musb_qh */
 	struct list_head	out_bulk;	/* of musb_qh */
+
+	struct timer_list	otg_timer;
 #endif
 
 	/* called with IRQs blocked; ON/nonzero implies starting a session,
@@ -355,7 +364,7 @@ struct musb {
 	u16			int_rx;
 	u16			int_tx;
 
-	struct otg_transceiver	xceiv;
+	struct otg_transceiver	*xceiv;
 
 	int nIrq;
 	unsigned		irq_wake:1;
@@ -386,6 +395,9 @@ struct musb {
 	unsigned is_multipoint:1;
 	unsigned ignore_disconnect:1;	/* during bus resets */
 
+	unsigned		hb_iso_rx:1;	/* high bandwidth iso rx? */
+	unsigned		hb_iso_tx:1;	/* high bandwidth iso tx? */
+
 #ifdef C_MP_TX
 	unsigned bulk_split:1;
 #define	can_bulk_split(musb,type) \
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index f79440cdfe7e..8b3c4e2ed7b8 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -310,7 +310,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
 			/* setup DMA, then program endpoint CSR */
 			request_size = min(request->length,
 						musb_ep->dma->max_len);
-			if (request_size <= musb_ep->packet_sz)
+			if (request_size < musb_ep->packet_sz)
 				musb_ep->dma->desired_mode = 0;
 			else
 				musb_ep->dma->desired_mode = 1;
@@ -349,7 +349,8 @@ static void txstate(struct musb *musb, struct musb_request *req)
 #elif defined(CONFIG_USB_TI_CPPI_DMA)
 		/* program endpoint CSR first, then setup DMA */
 		csr &= ~(MUSB_TXCSR_P_UNDERRUN | MUSB_TXCSR_TXPKTRDY);
-		csr |= MUSB_TXCSR_MODE | MUSB_TXCSR_DMAENAB;
+		csr |= MUSB_TXCSR_DMAENAB | MUSB_TXCSR_DMAMODE |
+		       MUSB_TXCSR_MODE;
 		musb_writew(epio, MUSB_TXCSR,
 			(MUSB_TXCSR_P_WZC_BITS & ~MUSB_TXCSR_P_UNDERRUN)
 				| csr);
@@ -1405,7 +1406,7 @@ static int musb_gadget_wakeup(struct usb_gadget *gadget)
 
 	spin_lock_irqsave(&musb->lock, flags);
 
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_B_PERIPHERAL:
 		/* NOTE:  OTG state machine doesn't include B_SUSPENDED;
 		 * that's part of the standard usb 1.1 state machine, and
@@ -1507,9 +1508,9 @@ static int musb_gadget_vbus_draw(struct usb_gadget *gadget, unsigned mA)
 {
 	struct musb	*musb = gadget_to_musb(gadget);
 
-	if (!musb->xceiv.set_power)
+	if (!musb->xceiv->set_power)
 		return -EOPNOTSUPP;
-	return otg_set_power(&musb->xceiv, mA);
+	return otg_set_power(musb->xceiv, mA);
 }
 
 static int musb_gadget_pullup(struct usb_gadget *gadget, int is_on)
@@ -1732,11 +1733,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 
 		spin_lock_irqsave(&musb->lock, flags);
 
-		/* REVISIT always use otg_set_peripheral(), handling
-		 * issues including the root hub one below ...
-		 */
-		musb->xceiv.gadget = &musb->g;
-		musb->xceiv.state = OTG_STATE_B_IDLE;
+		otg_set_peripheral(musb->xceiv, &musb->g);
 		musb->is_active = 1;
 
 		/* FIXME this ignores the softconnect flag.  Drivers are
@@ -1748,6 +1745,8 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 		if (!is_otg_enabled(musb))
 			musb_start(musb);
 
+		otg_set_peripheral(musb->xceiv, &musb->g);
+
 		spin_unlock_irqrestore(&musb->lock, flags);
 
 		if (is_otg_enabled(musb)) {
@@ -1761,8 +1760,7 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 			if (retval < 0) {
 				DBG(1, "add_hcd failed, %d\n", retval);
 				spin_lock_irqsave(&musb->lock, flags);
-				musb->xceiv.gadget = NULL;
-				musb->xceiv.state = OTG_STATE_UNDEFINED;
+				otg_set_peripheral(musb->xceiv, NULL);
 				musb->gadget_driver = NULL;
 				musb->g.dev.driver = NULL;
 				spin_unlock_irqrestore(&musb->lock, flags);
@@ -1845,8 +1843,9 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 
 		(void) musb_gadget_vbus_draw(&musb->g, 0);
 
-		musb->xceiv.state = OTG_STATE_UNDEFINED;
+		musb->xceiv->state = OTG_STATE_UNDEFINED;
 		stop_activity(musb, driver);
+		otg_set_peripheral(musb->xceiv, NULL);
 
 		DBG(3, "unregistering driver %s\n", driver->function);
 		spin_unlock_irqrestore(&musb->lock, flags);
@@ -1882,7 +1881,7 @@ EXPORT_SYMBOL(usb_gadget_unregister_driver);
 void musb_g_resume(struct musb *musb)
 {
 	musb->is_suspended = 0;
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_B_IDLE:
 		break;
 	case OTG_STATE_B_WAIT_ACON:
@@ -1908,10 +1907,10 @@ void musb_g_suspend(struct musb *musb)
 	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 	DBG(3, "devctl %02x\n", devctl);
 
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_B_IDLE:
 		if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
-			musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+			musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		break;
 	case OTG_STATE_B_PERIPHERAL:
 		musb->is_suspended = 1;
@@ -1957,22 +1956,24 @@ void musb_g_disconnect(struct musb *musb)
 		spin_lock(&musb->lock);
 	}
 
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	default:
 #ifdef	CONFIG_USB_MUSB_OTG
 		DBG(2, "Unhandled disconnect %s, setting a_idle\n",
 			otg_state_string(musb));
-		musb->xceiv.state = OTG_STATE_A_IDLE;
+		musb->xceiv->state = OTG_STATE_A_IDLE;
+		MUSB_HST_MODE(musb);
 		break;
 	case OTG_STATE_A_PERIPHERAL:
-		musb->xceiv.state = OTG_STATE_A_WAIT_VFALL;
+		musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
+		MUSB_HST_MODE(musb);
 		break;
 	case OTG_STATE_B_WAIT_ACON:
 	case OTG_STATE_B_HOST:
 #endif
 	case OTG_STATE_B_PERIPHERAL:
 	case OTG_STATE_B_IDLE:
-		musb->xceiv.state = OTG_STATE_B_IDLE;
+		musb->xceiv->state = OTG_STATE_B_IDLE;
 		break;
 	case OTG_STATE_B_SRP_INIT:
 		break;
@@ -2028,10 +2029,10 @@ __acquires(musb->lock)
 	 * or else after HNP, as A-Device
 	 */
 	if (devctl & MUSB_DEVCTL_BDEVICE) {
-		musb->xceiv.state = OTG_STATE_B_PERIPHERAL;
+		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
 		musb->g.is_a_peripheral = 0;
 	} else if (is_otg_enabled(musb)) {
-		musb->xceiv.state = OTG_STATE_A_PERIPHERAL;
+		musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
 		musb->g.is_a_peripheral = 1;
 	} else
 		WARN_ON(1);
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
index 3f5e30ddfa27..40ed50ecedff 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -4,6 +4,7 @@
  * Copyright 2005 Mentor Graphics Corporation
  * Copyright (C) 2005-2006 by Texas Instruments
  * Copyright (C) 2006-2007 Nokia Corporation
+ * Copyright (C) 2008-2009 MontaVista Software, Inc. <source@mvista.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -58,7 +59,8 @@
 static char *decode_ep0stage(u8 stage)
 {
 	switch (stage) {
-	case MUSB_EP0_STAGE_SETUP:	return "idle";
+	case MUSB_EP0_STAGE_IDLE:	return "idle";
+	case MUSB_EP0_STAGE_SETUP:	return "setup";
 	case MUSB_EP0_STAGE_TX:		return "in";
 	case MUSB_EP0_STAGE_RX:		return "out";
 	case MUSB_EP0_STAGE_ACKWAIT:	return "wait";
@@ -628,7 +630,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 		musb_writew(regs, MUSB_CSR0,
 				csr & ~MUSB_CSR0_P_SENTSTALL);
 		retval = IRQ_HANDLED;
-		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
+		musb->ep0_state = MUSB_EP0_STAGE_IDLE;
 		csr = musb_readw(regs, MUSB_CSR0);
 	}
 
@@ -636,7 +638,18 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 	if (csr & MUSB_CSR0_P_SETUPEND) {
 		musb_writew(regs, MUSB_CSR0, MUSB_CSR0_P_SVDSETUPEND);
 		retval = IRQ_HANDLED;
-		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
+		/* Transition into the early status phase */
+		switch (musb->ep0_state) {
+		case MUSB_EP0_STAGE_TX:
+			musb->ep0_state = MUSB_EP0_STAGE_STATUSOUT;
+			break;
+		case MUSB_EP0_STAGE_RX:
+			musb->ep0_state = MUSB_EP0_STAGE_STATUSIN;
+			break;
+		default:
+			ERR("SetupEnd came in a wrong ep0stage %s",
+			    decode_ep0stage(musb->ep0_state));
+		}
 		csr = musb_readw(regs, MUSB_CSR0);
 		/* NOTE:  request may need completion */
 	}
@@ -697,11 +710,31 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 			if (req)
 				musb_g_ep0_giveback(musb, req);
 		}
+
+		/*
+		 * In case when several interrupts can get coalesced,
+		 * check to see if we've already received a SETUP packet...
+		 */
+		if (csr & MUSB_CSR0_RXPKTRDY)
+			goto setup;
+
+		retval = IRQ_HANDLED;
+		musb->ep0_state = MUSB_EP0_STAGE_IDLE;
+		break;
+
+	case MUSB_EP0_STAGE_IDLE:
+		/*
+		 * This state is typically (but not always) indiscernible
+		 * from the status states since the corresponding interrupts
+		 * tend to happen within too little period of time (with only
+		 * a zero-length packet in between) and so get coalesced...
+		 */
 		retval = IRQ_HANDLED;
 		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
 		/* FALLTHROUGH */
 
 	case MUSB_EP0_STAGE_SETUP:
+setup:
 		if (csr & MUSB_CSR0_RXPKTRDY) {
 			struct usb_ctrlrequest	setup;
 			int			handled = 0;
@@ -783,7 +816,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 stall:
 				DBG(3, "stall (%d)\n", handled);
 				musb->ackpend |= MUSB_CSR0_P_SENDSTALL;
-				musb->ep0_state = MUSB_EP0_STAGE_SETUP;
+				musb->ep0_state = MUSB_EP0_STAGE_IDLE;
 finish:
 				musb_writew(regs, MUSB_CSR0,
 						musb->ackpend);
@@ -803,7 +836,7 @@ finish:
 		/* "can't happen" */
 		WARN_ON(1);
 		musb_writew(regs, MUSB_CSR0, MUSB_CSR0_P_SENDSTALL);
-		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
+		musb->ep0_state = MUSB_EP0_STAGE_IDLE;
 		break;
 	}
 
@@ -959,7 +992,7 @@ static int musb_g_ep0_halt(struct usb_ep *e, int value)
 
 		csr |= MUSB_CSR0_P_SENDSTALL;
 		musb_writew(regs, MUSB_CSR0, csr);
-		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
+		musb->ep0_state = MUSB_EP0_STAGE_IDLE;
 		musb->ackpend = 0;
 		break;
 	default:
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index db1b57415ec7..94a2a350a414 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -181,6 +181,19 @@ static inline void musb_h_tx_dma_start(struct musb_hw_ep *ep)
 	musb_writew(ep->regs, MUSB_TXCSR, txcsr);
 }
 
+static void musb_ep_set_qh(struct musb_hw_ep *ep, int is_in, struct musb_qh *qh)
+{
+	if (is_in != 0 || ep->is_shared_fifo)
+		ep->in_qh  = qh;
+	if (is_in == 0 || ep->is_shared_fifo)
+		ep->out_qh = qh;
+}
+
+static struct musb_qh *musb_ep_get_qh(struct musb_hw_ep *ep, int is_in)
+{
+	return is_in ? ep->in_qh : ep->out_qh;
+}
+
 /*
  * Start the URB at the front of an endpoint's queue
  * end must be claimed from the caller.
@@ -210,7 +223,6 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh)
 	case USB_ENDPOINT_XFER_CONTROL:
 		/* control transfers always start with SETUP */
 		is_in = 0;
-		hw_ep->out_qh = qh;
 		musb->ep0_stage = MUSB_EP0_START;
 		buf = urb->setup_packet;
 		len = 8;
@@ -239,10 +251,7 @@ musb_start_urb(struct musb *musb, int is_in, struct musb_qh *qh)
 			epnum, buf + offset, len);
 
 	/* Configure endpoint */
-	if (is_in || hw_ep->is_shared_fifo)
-		hw_ep->in_qh = qh;
-	else
-		hw_ep->out_qh = qh;
+	musb_ep_set_qh(hw_ep, is_in, qh);
 	musb_ep_program(musb, epnum, urb, !is_in, buf, offset, len);
 
 	/* transmit may have more work: start it when it is time */
@@ -286,9 +295,8 @@ start:
 	}
 }
 
-/* caller owns controller lock, irqs are blocked */
-static void
-__musb_giveback(struct musb *musb, struct urb *urb, int status)
+/* Context: caller owns controller lock, IRQs are blocked */
+static void musb_giveback(struct musb *musb, struct urb *urb, int status)
 __releases(musb->lock)
 __acquires(musb->lock)
 {
@@ -321,60 +329,57 @@ __acquires(musb->lock)
 	spin_lock(&musb->lock);
 }
 
-/* for bulk/interrupt endpoints only */
-static inline void
-musb_save_toggle(struct musb_hw_ep *ep, int is_in, struct urb *urb)
+/* For bulk/interrupt endpoints only */
+static inline void musb_save_toggle(struct musb_qh *qh, int is_in,
+				    struct urb *urb)
 {
-	struct usb_device	*udev = urb->dev;
+	void __iomem		*epio = qh->hw_ep->regs;
 	u16			csr;
-	void __iomem		*epio = ep->regs;
-	struct musb_qh		*qh;
 
-	/* FIXME:  the current Mentor DMA code seems to have
+	/*
+	 * FIXME: the current Mentor DMA code seems to have
 	 * problems getting toggle correct.
 	 */
 
-	if (is_in || ep->is_shared_fifo)
-		qh = ep->in_qh;
+	if (is_in)
+		csr = musb_readw(epio, MUSB_RXCSR) & MUSB_RXCSR_H_DATATOGGLE;
 	else
-		qh = ep->out_qh;
+		csr = musb_readw(epio, MUSB_TXCSR) & MUSB_TXCSR_H_DATATOGGLE;
 
-	if (!is_in) {
-		csr = musb_readw(epio, MUSB_TXCSR);
-		usb_settoggle(udev, qh->epnum, 1,
-			(csr & MUSB_TXCSR_H_DATATOGGLE)
-				? 1 : 0);
-	} else {
-		csr = musb_readw(epio, MUSB_RXCSR);
-		usb_settoggle(udev, qh->epnum, 0,
-			(csr & MUSB_RXCSR_H_DATATOGGLE)
-				? 1 : 0);
-	}
+	usb_settoggle(urb->dev, qh->epnum, !is_in, csr ? 1 : 0);
 }
 
-/* caller owns controller lock, irqs are blocked */
-static struct musb_qh *
-musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
+/*
+ * Advance this hardware endpoint's queue, completing the specified URB and
+ * advancing to either the next URB queued to that qh, or else invalidating
+ * that qh and advancing to the next qh scheduled after the current one.
+ *
+ * Context: caller owns controller lock, IRQs are blocked
+ */
+static void musb_advance_schedule(struct musb *musb, struct urb *urb,
+				  struct musb_hw_ep *hw_ep, int is_in)
 {
+	struct musb_qh		*qh = musb_ep_get_qh(hw_ep, is_in);
 	struct musb_hw_ep	*ep = qh->hw_ep;
-	struct musb		*musb = ep->musb;
-	int			is_in = usb_pipein(urb->pipe);
 	int			ready = qh->is_ready;
+	int			status;
+
+	status = (urb->status == -EINPROGRESS) ? 0 : urb->status;
 
 	/* save toggle eagerly, for paranoia */
 	switch (qh->type) {
 	case USB_ENDPOINT_XFER_BULK:
 	case USB_ENDPOINT_XFER_INT:
-		musb_save_toggle(ep, is_in, urb);
+		musb_save_toggle(qh, is_in, urb);
 		break;
 	case USB_ENDPOINT_XFER_ISOC:
-		if (status == 0 && urb->error_count)
+		if (urb->error_count)
 			status = -EXDEV;
 		break;
 	}
 
 	qh->is_ready = 0;
-	__musb_giveback(musb, urb, status);
+	musb_giveback(musb, urb, status);
 	qh->is_ready = ready;
 
 	/* reclaim resources (and bandwidth) ASAP; deschedule it, and
@@ -388,11 +393,8 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
 		else
 			ep->tx_reinit = 1;
 
-		/* clobber old pointers to this qh */
-		if (is_in || ep->is_shared_fifo)
-			ep->in_qh = NULL;
-		else
-			ep->out_qh = NULL;
+		/* Clobber old pointers to this qh */
+		musb_ep_set_qh(ep, is_in, NULL);
 		qh->hep->hcpriv = NULL;
 
 		switch (qh->type) {
@@ -421,36 +423,10 @@ musb_giveback(struct musb_qh *qh, struct urb *urb, int status)
 			break;
 		}
 	}
-	return qh;
-}
-
-/*
- * Advance this hardware endpoint's queue, completing the specified urb and
- * advancing to either the next urb queued to that qh, or else invalidating
- * that qh and advancing to the next qh scheduled after the current one.
- *
- * Context: caller owns controller lock, irqs are blocked
- */
-static void
-musb_advance_schedule(struct musb *musb, struct urb *urb,
-		struct musb_hw_ep *hw_ep, int is_in)
-{
-	struct musb_qh	*qh;
-
-	if (is_in || hw_ep->is_shared_fifo)
-		qh = hw_ep->in_qh;
-	else
-		qh = hw_ep->out_qh;
-
-	if (urb->status == -EINPROGRESS)
-		qh = musb_giveback(qh, urb, 0);
-	else
-		qh = musb_giveback(qh, urb, urb->status);
 
 	if (qh != NULL && qh->is_ready) {
 		DBG(4, "... next ep%d %cX urb %p\n",
-				hw_ep->epnum, is_in ? 'R' : 'T',
-				next_urb(qh));
+		    hw_ep->epnum, is_in ? 'R' : 'T', next_urb(qh));
 		musb_start_urb(musb, is_in, qh);
 	}
 }
@@ -629,7 +605,8 @@ musb_rx_reinit(struct musb *musb, struct musb_qh *qh, struct musb_hw_ep *ep)
 	musb_writeb(ep->regs, MUSB_RXTYPE, qh->type_reg);
 	musb_writeb(ep->regs, MUSB_RXINTERVAL, qh->intv_reg);
 	/* NOTE: bulk combining rewrites high bits of maxpacket */
-	musb_writew(ep->regs, MUSB_RXMAXP, qh->maxpacket);
+	musb_writew(ep->regs, MUSB_RXMAXP,
+			qh->maxpacket | ((qh->hb_mult - 1) << 11));
 
 	ep->rx_reinit = 0;
 }
@@ -651,9 +628,10 @@ static bool musb_tx_dma_program(struct dma_controller *dma,
 	csr = musb_readw(epio, MUSB_TXCSR);
 	if (length > pkt_size) {
 		mode = 1;
-		csr |= MUSB_TXCSR_AUTOSET
-			| MUSB_TXCSR_DMAMODE
-			| MUSB_TXCSR_DMAENAB;
+		csr |= MUSB_TXCSR_DMAMODE | MUSB_TXCSR_DMAENAB;
+		/* autoset shouldn't be set in high bandwidth */
+		if (qh->hb_mult == 1)
+			csr |= MUSB_TXCSR_AUTOSET;
 	} else {
 		mode = 0;
 		csr &= ~(MUSB_TXCSR_AUTOSET | MUSB_TXCSR_DMAMODE);
@@ -703,15 +681,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum,
 	void __iomem		*mbase = musb->mregs;
 	struct musb_hw_ep	*hw_ep = musb->endpoints + epnum;
 	void __iomem		*epio = hw_ep->regs;
-	struct musb_qh		*qh;
-	u16			packet_sz;
-
-	if (!is_out || hw_ep->is_shared_fifo)
-		qh = hw_ep->in_qh;
-	else
-		qh = hw_ep->out_qh;
-
-	packet_sz = qh->maxpacket;
+	struct musb_qh		*qh = musb_ep_get_qh(hw_ep, !is_out);
+	u16			packet_sz = qh->maxpacket;
 
 	DBG(3, "%s hw%d urb %p spd%d dev%d ep%d%s "
 				"h_addr%02x h_port%02x bytes %d\n",
@@ -1129,17 +1100,14 @@ void musb_host_tx(struct musb *musb, u8 epnum)
 	u16			tx_csr;
 	size_t			length = 0;
 	size_t			offset = 0;
-	struct urb		*urb;
 	struct musb_hw_ep	*hw_ep = musb->endpoints + epnum;
 	void __iomem		*epio = hw_ep->regs;
-	struct musb_qh		*qh = hw_ep->is_shared_fifo ? hw_ep->in_qh
-							    : hw_ep->out_qh;
+	struct musb_qh		*qh = hw_ep->out_qh;
+	struct urb		*urb = next_urb(qh);
 	u32			status = 0;
 	void __iomem		*mbase = musb->mregs;
 	struct dma_channel	*dma;
 
-	urb = next_urb(qh);
-
 	musb_ep_select(mbase, epnum);
 	tx_csr = musb_readw(epio, MUSB_TXCSR);
 
@@ -1427,7 +1395,7 @@ static void musb_bulk_rx_nak_timeout(struct musb *musb, struct musb_hw_ep *ep)
 			urb->actual_length += dma->actual_len;
 			dma->actual_len = 0L;
 		}
-		musb_save_toggle(ep, 1, urb);
+		musb_save_toggle(cur_qh, 1, urb);
 
 		/* move cur_qh to end of queue */
 		list_move_tail(&cur_qh->ring, &musb->in_bulk);
@@ -1531,6 +1499,10 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 			/* packet error reported later */
 			iso_err = true;
 		}
+	} else if (rx_csr & MUSB_RXCSR_INCOMPRX) {
+		DBG(3, "end %d high bandwidth incomplete ISO packet RX\n",
+				epnum);
+		status = -EPROTO;
 	}
 
 	/* faults abort the transfer */
@@ -1738,7 +1710,11 @@ void musb_host_rx(struct musb *musb, u8 epnum)
 				val &= ~MUSB_RXCSR_H_AUTOREQ;
 			else
 				val |= MUSB_RXCSR_H_AUTOREQ;
-			val |= MUSB_RXCSR_AUTOCLEAR | MUSB_RXCSR_DMAENAB;
+			val |= MUSB_RXCSR_DMAENAB;
+
+			/* autoclear shouldn't be set in high bandwidth */
+			if (qh->hb_mult == 1)
+				val |= MUSB_RXCSR_AUTOCLEAR;
 
 			musb_writew(epio, MUSB_RXCSR,
 				MUSB_RXCSR_H_WZC_BITS | val);
@@ -1817,19 +1793,17 @@ static int musb_schedule(
 			epnum++, hw_ep++) {
 		int	diff;
 
-		if (is_in || hw_ep->is_shared_fifo) {
-			if (hw_ep->in_qh  != NULL)
-				continue;
-		} else	if (hw_ep->out_qh != NULL)
+		if (musb_ep_get_qh(hw_ep, is_in) != NULL)
 			continue;
 
 		if (hw_ep == musb->bulk_ep)
 			continue;
 
 		if (is_in)
-			diff = hw_ep->max_packet_sz_rx - qh->maxpacket;
+			diff = hw_ep->max_packet_sz_rx;
 		else
-			diff = hw_ep->max_packet_sz_tx - qh->maxpacket;
+			diff = hw_ep->max_packet_sz_tx;
+		diff -= (qh->maxpacket * qh->hb_mult);
 
 		if (diff >= 0 && best_diff > diff) {
 			best_diff = diff;
@@ -1932,15 +1906,27 @@ static int musb_urb_enqueue(
 	qh->is_ready = 1;
 
 	qh->maxpacket = le16_to_cpu(epd->wMaxPacketSize);
+	qh->type = usb_endpoint_type(epd);
 
-	/* no high bandwidth support yet */
-	if (qh->maxpacket & ~0x7ff) {
-		ret = -EMSGSIZE;
-		goto done;
+	/* Bits 11 & 12 of wMaxPacketSize encode high bandwidth multiplier.
+	 * Some musb cores don't support high bandwidth ISO transfers; and
+	 * we don't (yet!) support high bandwidth interrupt transfers.
+	 */
+	qh->hb_mult = 1 + ((qh->maxpacket >> 11) & 0x03);
+	if (qh->hb_mult > 1) {
+		int ok = (qh->type == USB_ENDPOINT_XFER_ISOC);
+
+		if (ok)
+			ok = (usb_pipein(urb->pipe) && musb->hb_iso_rx)
+				|| (usb_pipeout(urb->pipe) && musb->hb_iso_tx);
+		if (!ok) {
+			ret = -EMSGSIZE;
+			goto done;
+		}
+		qh->maxpacket &= 0x7ff;
 	}
 
 	qh->epnum = usb_endpoint_num(epd);
-	qh->type = usb_endpoint_type(epd);
 
 	/* NOTE: urb->dev->devnum is wrong during SET_ADDRESS */
 	qh->addr_reg = (u8) usb_pipedevice(urb->pipe);
@@ -2052,14 +2038,15 @@ done:
  * called with controller locked, irqs blocked
  * that hardware queue advances to the next transfer, unless prevented
  */
-static int musb_cleanup_urb(struct urb *urb, struct musb_qh *qh, int is_in)
+static int musb_cleanup_urb(struct urb *urb, struct musb_qh *qh)
 {
 	struct musb_hw_ep	*ep = qh->hw_ep;
 	void __iomem		*epio = ep->regs;
 	unsigned		hw_end = ep->epnum;
 	void __iomem		*regs = ep->musb->mregs;
-	u16			csr;
+	int			is_in = usb_pipein(urb->pipe);
 	int			status = 0;
+	u16			csr;
 
 	musb_ep_select(regs, hw_end);
 
@@ -2112,14 +2099,14 @@ static int musb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 {
 	struct musb		*musb = hcd_to_musb(hcd);
 	struct musb_qh		*qh;
-	struct list_head	*sched;
 	unsigned long		flags;
+	int			is_in  = usb_pipein(urb->pipe);
 	int			ret;
 
 	DBG(4, "urb=%p, dev%d ep%d%s\n", urb,
 			usb_pipedevice(urb->pipe),
 			usb_pipeendpoint(urb->pipe),
-			usb_pipein(urb->pipe) ? "in" : "out");
+			is_in ? "in" : "out");
 
 	spin_lock_irqsave(&musb->lock, flags);
 	ret = usb_hcd_check_unlink_urb(hcd, urb, status);
@@ -2130,47 +2117,25 @@ static int musb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 	if (!qh)
 		goto done;
 
-	/* Any URB not actively programmed into endpoint hardware can be
+	/*
+	 * Any URB not actively programmed into endpoint hardware can be
 	 * immediately given back; that's any URB not at the head of an
 	 * endpoint queue, unless someday we get real DMA queues.  And even
 	 * if it's at the head, it might not be known to the hardware...
 	 *
-	 * Otherwise abort current transfer, pending dma, etc.; urb->status
+	 * Otherwise abort current transfer, pending DMA, etc.; urb->status
 	 * has already been updated.  This is a synchronous abort; it'd be
 	 * OK to hold off until after some IRQ, though.
+	 *
+	 * NOTE: qh is invalid unless !list_empty(&hep->urb_list)
 	 */
-	if (!qh->is_ready || urb->urb_list.prev != &qh->hep->urb_list)
-		ret = -EINPROGRESS;
-	else {
-		switch (qh->type) {
-		case USB_ENDPOINT_XFER_CONTROL:
-			sched = &musb->control;
-			break;
-		case USB_ENDPOINT_XFER_BULK:
-			if (qh->mux == 1) {
-				if (usb_pipein(urb->pipe))
-					sched = &musb->in_bulk;
-				else
-					sched = &musb->out_bulk;
-				break;
-			}
-		default:
-			/* REVISIT when we get a schedule tree, periodic
-			 * transfers won't always be at the head of a
-			 * singleton queue...
-			 */
-			sched = NULL;
-			break;
-		}
-	}
-
-	/* NOTE:  qh is invalid unless !list_empty(&hep->urb_list) */
-	if (ret < 0 || (sched && qh != first_qh(sched))) {
+	if (!qh->is_ready
+			|| urb->urb_list.prev != &qh->hep->urb_list
+			|| musb_ep_get_qh(qh->hw_ep, is_in) != qh) {
 		int	ready = qh->is_ready;
 
-		ret = 0;
 		qh->is_ready = 0;
-		__musb_giveback(musb, urb, 0);
+		musb_giveback(musb, urb, 0);
 		qh->is_ready = ready;
 
 		/* If nothing else (usually musb_giveback) is using it
@@ -2182,7 +2147,7 @@ static int musb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
 			kfree(qh);
 		}
 	} else
-		ret = musb_cleanup_urb(urb, qh, urb->pipe & USB_DIR_IN);
+		ret = musb_cleanup_urb(urb, qh);
 done:
 	spin_unlock_irqrestore(&musb->lock, flags);
 	return ret;
@@ -2192,13 +2157,11 @@ done:
 static void
 musb_h_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
 {
-	u8			epnum = hep->desc.bEndpointAddress;
+	u8			is_in = hep->desc.bEndpointAddress & USB_DIR_IN;
 	unsigned long		flags;
 	struct musb		*musb = hcd_to_musb(hcd);
-	u8			is_in = epnum & USB_DIR_IN;
 	struct musb_qh		*qh;
 	struct urb		*urb;
-	struct list_head	*sched;
 
 	spin_lock_irqsave(&musb->lock, flags);
 
@@ -2206,31 +2169,11 @@ musb_h_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
 	if (qh == NULL)
 		goto exit;
 
-	switch (qh->type) {
-	case USB_ENDPOINT_XFER_CONTROL:
-		sched = &musb->control;
-		break;
-	case USB_ENDPOINT_XFER_BULK:
-		if (qh->mux == 1) {
-			if (is_in)
-				sched = &musb->in_bulk;
-			else
-				sched = &musb->out_bulk;
-			break;
-		}
-	default:
-		/* REVISIT when we get a schedule tree, periodic transfers
-		 * won't always be at the head of a singleton queue...
-		 */
-		sched = NULL;
-		break;
-	}
-
-	/* NOTE:  qh is invalid unless !list_empty(&hep->urb_list) */
+	/* NOTE: qh is invalid unless !list_empty(&hep->urb_list) */
 
-	/* kick first urb off the hardware, if needed */
+	/* Kick the first URB off the hardware, if needed */
 	qh->is_ready = 0;
-	if (!sched || qh == first_qh(sched)) {
+	if (musb_ep_get_qh(qh->hw_ep, is_in) == qh) {
 		urb = next_urb(qh);
 
 		/* make software (then hardware) stop ASAP */
@@ -2238,7 +2181,7 @@ musb_h_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
 			urb->status = -ESHUTDOWN;
 
 		/* cleanup */
-		musb_cleanup_urb(urb, qh, urb->pipe & USB_DIR_IN);
+		musb_cleanup_urb(urb, qh);
 
 		/* Then nuke all the others ... and advance the
 		 * queue on hw_ep (e.g. bulk ring) when we're done.
@@ -2254,7 +2197,7 @@ musb_h_disable(struct usb_hcd *hcd, struct usb_host_endpoint *hep)
 		 * will activate any of these as it advances.
 		 */
 		while (!list_empty(&hep->urb_list))
-			__musb_giveback(musb, next_urb(qh), -ESHUTDOWN);
+			musb_giveback(musb, next_urb(qh), -ESHUTDOWN);
 
 		hep->hcpriv = NULL;
 		list_del(&qh->ring);
@@ -2293,7 +2236,7 @@ static int musb_bus_suspend(struct usb_hcd *hcd)
 {
 	struct musb	*musb = hcd_to_musb(hcd);
 
-	if (musb->xceiv.state == OTG_STATE_A_SUSPEND)
+	if (musb->xceiv->state == OTG_STATE_A_SUSPEND)
 		return 0;
 
 	if (is_host_active(musb) && musb->is_active) {
diff --git a/drivers/usb/musb/musb_host.h b/drivers/usb/musb/musb_host.h
index 0b7fbcd21963..14b00776638d 100644
--- a/drivers/usb/musb/musb_host.h
+++ b/drivers/usb/musb/musb_host.h
@@ -67,6 +67,7 @@ struct musb_qh {
 	u8			is_ready;	/* safe to modify hw_ep */
 	u8			type;		/* XFERTYPE_* */
 	u8			epnum;
+	u8			hb_mult;	/* high bandwidth pkts per uf */
 	u16			maxpacket;
 	u16			frame;		/* for periodic schedule */
 	unsigned		iso_idx;	/* in urb->iso_frame_desc[] */
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index bf677acc83db..bfe5fe4ebfee 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -78,18 +78,22 @@ static void musb_port_suspend(struct musb *musb, bool do_suspend)
 		DBG(3, "Root port suspended, power %02x\n", power);
 
 		musb->port1_status |= USB_PORT_STAT_SUSPEND;
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 		case OTG_STATE_A_HOST:
-			musb->xceiv.state = OTG_STATE_A_SUSPEND;
+			musb->xceiv->state = OTG_STATE_A_SUSPEND;
 			musb->is_active = is_otg_enabled(musb)
-					&& musb->xceiv.host->b_hnp_enable;
+					&& musb->xceiv->host->b_hnp_enable;
+			if (musb->is_active)
+				mod_timer(&musb->otg_timer, jiffies
+					+ msecs_to_jiffies(
+						OTG_TIME_A_AIDL_BDIS));
 			musb_platform_try_idle(musb, 0);
 			break;
 #ifdef	CONFIG_USB_MUSB_OTG
 		case OTG_STATE_B_HOST:
-			musb->xceiv.state = OTG_STATE_B_WAIT_ACON;
+			musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
 			musb->is_active = is_otg_enabled(musb)
-					&& musb->xceiv.host->b_hnp_enable;
+					&& musb->xceiv->host->b_hnp_enable;
 			musb_platform_try_idle(musb, 0);
 			break;
 #endif
@@ -116,7 +120,7 @@ static void musb_port_reset(struct musb *musb, bool do_reset)
 	void __iomem	*mbase = musb->mregs;
 
 #ifdef CONFIG_USB_MUSB_OTG
-	if (musb->xceiv.state == OTG_STATE_B_IDLE) {
+	if (musb->xceiv->state == OTG_STATE_B_IDLE) {
 		DBG(2, "HNP: Returning from HNP; no hub reset from b_idle\n");
 		musb->port1_status &= ~USB_PORT_STAT_RESET;
 		return;
@@ -186,14 +190,23 @@ void musb_root_disconnect(struct musb *musb)
 	usb_hcd_poll_rh_status(musb_to_hcd(musb));
 	musb->is_active = 0;
 
-	switch (musb->xceiv.state) {
-	case OTG_STATE_A_HOST:
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_SUSPEND:
-		musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
+#ifdef	CONFIG_USB_MUSB_OTG
+		if (is_otg_enabled(musb)
+				&& musb->xceiv->host->b_hnp_enable) {
+			musb->xceiv->state = OTG_STATE_A_PERIPHERAL;
+			musb->g.is_a_peripheral = 1;
+			break;
+		}
+#endif
+		/* FALLTHROUGH */
+	case OTG_STATE_A_HOST:
+		musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 		musb->is_active = 0;
 		break;
 	case OTG_STATE_A_WAIT_VFALL:
-		musb->xceiv.state = OTG_STATE_B_IDLE;
+		musb->xceiv->state = OTG_STATE_B_IDLE;
 		break;
 	default:
 		DBG(1, "host disconnect (%s)\n", otg_state_string(musb));
@@ -332,7 +345,7 @@ int musb_hub_control(
 			musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
 			usb_hcd_poll_rh_status(musb_to_hcd(musb));
 			/* NOTE: it might really be A_WAIT_BCON ... */
-			musb->xceiv.state = OTG_STATE_A_HOST;
+			musb->xceiv->state = OTG_STATE_A_HOST;
 		}
 
 		put_unaligned(cpu_to_le32(musb->port1_status
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index 60924ce08493..48930f25c450 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -44,7 +44,6 @@
 #define	get_cpu_rev()	2
 #endif
 
-#define MUSB_TIMEOUT_A_WAIT_BCON	1100
 
 static struct timer_list musb_idle_timer;
 
@@ -61,17 +60,17 @@ static void musb_do_idle(unsigned long _musb)
 
 	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_WAIT_BCON:
 		devctl &= ~MUSB_DEVCTL_SESSION;
 		musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
 
 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 		if (devctl & MUSB_DEVCTL_BDEVICE) {
-			musb->xceiv.state = OTG_STATE_B_IDLE;
+			musb->xceiv->state = OTG_STATE_B_IDLE;
 			MUSB_DEV_MODE(musb);
 		} else {
-			musb->xceiv.state = OTG_STATE_A_IDLE;
+			musb->xceiv->state = OTG_STATE_A_IDLE;
 			MUSB_HST_MODE(musb);
 		}
 		break;
@@ -89,7 +88,7 @@ static void musb_do_idle(unsigned long _musb)
 			musb->port1_status |= USB_PORT_STAT_C_SUSPEND << 16;
 			usb_hcd_poll_rh_status(musb_to_hcd(musb));
 			/* NOTE: it might really be A_WAIT_BCON ... */
-			musb->xceiv.state = OTG_STATE_A_HOST;
+			musb->xceiv->state = OTG_STATE_A_HOST;
 		}
 		break;
 #endif
@@ -97,9 +96,9 @@ static void musb_do_idle(unsigned long _musb)
 	case OTG_STATE_A_HOST:
 		devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 		if (devctl &  MUSB_DEVCTL_BDEVICE)
-			musb->xceiv.state = OTG_STATE_B_IDLE;
+			musb->xceiv->state = OTG_STATE_B_IDLE;
 		else
-			musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
+			musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 #endif
 	default:
 		break;
@@ -118,7 +117,7 @@ void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
 
 	/* Never idle if active, or when VBUS timeout is not set as host */
 	if (musb->is_active || ((musb->a_wait_bcon == 0)
-			&& (musb->xceiv.state == OTG_STATE_A_WAIT_BCON))) {
+			&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 		DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
 		del_timer(&musb_idle_timer);
 		last_timer = jiffies;
@@ -163,8 +162,8 @@ static void omap_set_vbus(struct musb *musb, int is_on)
 
 	if (is_on) {
 		musb->is_active = 1;
-		musb->xceiv.default_a = 1;
-		musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
+		musb->xceiv->default_a = 1;
+		musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 		devctl |= MUSB_DEVCTL_SESSION;
 
 		MUSB_HST_MODE(musb);
@@ -175,8 +174,8 @@ static void omap_set_vbus(struct musb *musb, int is_on)
 		 * jumping right to B_IDLE...
 		 */
 
-		musb->xceiv.default_a = 0;
-		musb->xceiv.state = OTG_STATE_B_IDLE;
+		musb->xceiv->default_a = 0;
+		musb->xceiv->state = OTG_STATE_B_IDLE;
 		devctl &= ~MUSB_DEVCTL_SESSION;
 
 		MUSB_DEV_MODE(musb);
@@ -188,10 +187,6 @@ static void omap_set_vbus(struct musb *musb, int is_on)
 		otg_state_string(musb),
 		musb_readb(musb->mregs, MUSB_DEVCTL));
 }
-static int omap_set_power(struct otg_transceiver *x, unsigned mA)
-{
-	return 0;
-}
 
 static int musb_platform_resume(struct musb *musb);
 
@@ -202,24 +197,6 @@ int musb_platform_set_mode(struct musb *musb, u8 musb_mode)
 	devctl |= MUSB_DEVCTL_SESSION;
 	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;
 }
 
@@ -231,6 +208,16 @@ int __init musb_platform_init(struct musb *musb)
 	omap_cfg_reg(AE5_2430_USB0HS_STP);
 #endif
 
+	/* We require some kind of external transceiver, hooked
+	 * up through ULPI.  TWL4030-family PMICs include one,
+	 * which needs a driver, drivers aren't always needed.
+	 */
+	musb->xceiv = otg_get_transceiver();
+	if (!musb->xceiv) {
+		pr_err("HS USB OTG: no transceiver configured\n");
+		return -ENODEV;
+	}
+
 	musb_platform_resume(musb);
 
 	l = omap_readl(OTG_SYSCONFIG);
@@ -257,9 +244,6 @@ int __init musb_platform_init(struct musb *musb)
 
 	if (is_host_enabled(musb))
 		musb->board_set_vbus = omap_set_vbus;
-	if (is_peripheral_enabled(musb))
-		musb->xceiv.set_power = omap_set_power;
-	musb->a_wait_bcon = MUSB_TIMEOUT_A_WAIT_BCON;
 
 	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 
@@ -282,8 +266,7 @@ int musb_platform_suspend(struct musb *musb)
 	l |= ENABLEWAKEUP;	/* enable wakeup */
 	omap_writel(l, OTG_SYSCONFIG);
 
-	if (musb->xceiv.set_suspend)
-		musb->xceiv.set_suspend(&musb->xceiv, 1);
+	otg_set_suspend(musb->xceiv, 1);
 
 	if (musb->set_clock)
 		musb->set_clock(musb->clock, 0);
@@ -300,8 +283,7 @@ static int musb_platform_resume(struct musb *musb)
 	if (!musb->clock)
 		return 0;
 
-	if (musb->xceiv.set_suspend)
-		musb->xceiv.set_suspend(&musb->xceiv, 0);
+	otg_set_suspend(musb->xceiv, 0);
 
 	if (musb->set_clock)
 		musb->set_clock(musb->clock, 1);
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 4ac1477d3569..88b587c703e9 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -259,6 +259,8 @@ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
 		tusb_fifo_read_unaligned(fifo, buf, len);
 }
 
+static struct musb *the_musb;
+
 #ifdef CONFIG_USB_GADGET_MUSB_HDRC
 
 /* This is used by gadget drivers, and OTG transceiver logic, allowing
@@ -269,7 +271,7 @@ void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *buf)
  */
 static int tusb_draw_power(struct otg_transceiver *x, unsigned mA)
 {
-	struct musb	*musb = container_of(x, struct musb, xceiv);
+	struct musb	*musb = the_musb;
 	void __iomem	*tbase = musb->ctrl_base;
 	u32		reg;
 
@@ -419,7 +421,7 @@ static void musb_do_idle(unsigned long _musb)
 
 	spin_lock_irqsave(&musb->lock, flags);
 
-	switch (musb->xceiv.state) {
+	switch (musb->xceiv->state) {
 	case OTG_STATE_A_WAIT_BCON:
 		if ((musb->a_wait_bcon != 0)
 			&& (musb->idle_timeout == 0
@@ -483,7 +485,7 @@ void musb_platform_try_idle(struct musb *musb, unsigned long timeout)
 
 	/* Never idle if active, or when VBUS timeout is not set as host */
 	if (musb->is_active || ((musb->a_wait_bcon == 0)
-			&& (musb->xceiv.state == OTG_STATE_A_WAIT_BCON))) {
+			&& (musb->xceiv->state == OTG_STATE_A_WAIT_BCON))) {
 		DBG(4, "%s active, deleting timer\n", otg_state_string(musb));
 		del_timer(&musb_idle_timer);
 		last_timer = jiffies;
@@ -532,8 +534,8 @@ static void tusb_source_power(struct musb *musb, int is_on)
 		if (musb->set_clock)
 			musb->set_clock(musb->clock, 1);
 		timer = OTG_TIMER_MS(OTG_TIME_A_WAIT_VRISE);
-		musb->xceiv.default_a = 1;
-		musb->xceiv.state = OTG_STATE_A_WAIT_VRISE;
+		musb->xceiv->default_a = 1;
+		musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
 		devctl |= MUSB_DEVCTL_SESSION;
 
 		conf |= TUSB_DEV_CONF_USB_HOST_MODE;
@@ -546,24 +548,24 @@ static void tusb_source_power(struct musb *musb, int is_on)
 		/* If ID pin is grounded, we want to be a_idle */
 		otg_stat = musb_readl(tbase, TUSB_DEV_OTG_STAT);
 		if (!(otg_stat & TUSB_DEV_OTG_STAT_ID_STATUS)) {
-			switch (musb->xceiv.state) {
+			switch (musb->xceiv->state) {
 			case OTG_STATE_A_WAIT_VRISE:
 			case OTG_STATE_A_WAIT_BCON:
-				musb->xceiv.state = OTG_STATE_A_WAIT_VFALL;
+				musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
 				break;
 			case OTG_STATE_A_WAIT_VFALL:
-				musb->xceiv.state = OTG_STATE_A_IDLE;
+				musb->xceiv->state = OTG_STATE_A_IDLE;
 				break;
 			default:
-				musb->xceiv.state = OTG_STATE_A_IDLE;
+				musb->xceiv->state = OTG_STATE_A_IDLE;
 			}
 			musb->is_active = 0;
-			musb->xceiv.default_a = 1;
+			musb->xceiv->default_a = 1;
 			MUSB_HST_MODE(musb);
 		} else {
 			musb->is_active = 0;
-			musb->xceiv.default_a = 0;
-			musb->xceiv.state = OTG_STATE_B_IDLE;
+			musb->xceiv->default_a = 0;
+			musb->xceiv->state = OTG_STATE_B_IDLE;
 			MUSB_DEV_MODE(musb);
 		}
 
@@ -674,7 +676,7 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 		else
 			default_a = is_host_enabled(musb);
 		DBG(2, "Default-%c\n", default_a ? 'A' : 'B');
-		musb->xceiv.default_a = default_a;
+		musb->xceiv->default_a = default_a;
 		tusb_source_power(musb, default_a);
 
 		/* Don't allow idling immediately */
@@ -686,7 +688,7 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 	if (int_src & TUSB_INT_SRC_VBUS_SENSE_CHNG) {
 
 		/* B-dev state machine:  no vbus ~= disconnect */
-		if ((is_otg_enabled(musb) && !musb->xceiv.default_a)
+		if ((is_otg_enabled(musb) && !musb->xceiv->default_a)
 				|| !is_host_enabled(musb)) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 			/* ? musb_root_disconnect(musb); */
@@ -701,9 +703,9 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 
 			if (otg_stat & TUSB_DEV_OTG_STAT_SESS_END) {
 				DBG(1, "Forcing disconnect (no interrupt)\n");
-				if (musb->xceiv.state != OTG_STATE_B_IDLE) {
+				if (musb->xceiv->state != OTG_STATE_B_IDLE) {
 					/* INTR_DISCONNECT can hide... */
-					musb->xceiv.state = OTG_STATE_B_IDLE;
+					musb->xceiv->state = OTG_STATE_B_IDLE;
 					musb->int_usb |= MUSB_INTR_DISCONNECT;
 				}
 				musb->is_active = 0;
@@ -717,7 +719,7 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 			DBG(2, "vbus change, %s, otg %03x\n",
 				otg_state_string(musb), otg_stat);
 
-			switch (musb->xceiv.state) {
+			switch (musb->xceiv->state) {
 			case OTG_STATE_A_IDLE:
 				DBG(2, "Got SRP, turning on VBUS\n");
 				musb_set_vbus(musb, 1);
@@ -765,7 +767,7 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 
 		DBG(4, "%s timer, %03x\n", otg_state_string(musb), otg_stat);
 
-		switch (musb->xceiv.state) {
+		switch (musb->xceiv->state) {
 		case OTG_STATE_A_WAIT_VRISE:
 			/* VBUS has probably been valid for a while now,
 			 * but may well have bounced out of range a bit
@@ -777,7 +779,7 @@ tusb_otg_ints(struct musb *musb, u32 int_src, void __iomem *tbase)
 					DBG(2, "devctl %02x\n", devctl);
 					break;
 				}
-				musb->xceiv.state = OTG_STATE_A_WAIT_BCON;
+				musb->xceiv->state = OTG_STATE_A_WAIT_BCON;
 				musb->is_active = 0;
 				idle_timeout = jiffies
 					+ msecs_to_jiffies(musb->a_wait_bcon);
@@ -1093,9 +1095,14 @@ int __init musb_platform_init(struct musb *musb)
 {
 	struct platform_device	*pdev;
 	struct resource		*mem;
-	void __iomem		*sync;
+	void __iomem		*sync = NULL;
 	int			ret;
 
+	usb_nop_xceiv_register();
+	musb->xceiv = otg_get_transceiver();
+	if (!musb->xceiv)
+		return -ENODEV;
+
 	pdev = to_platform_device(musb->controller);
 
 	/* dma address for async dma */
@@ -1106,14 +1113,16 @@ int __init musb_platform_init(struct musb *musb)
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (!mem) {
 		pr_debug("no sync dma resource?\n");
-		return -ENODEV;
+		ret = -ENODEV;
+		goto done;
 	}
 	musb->sync = mem->start;
 
 	sync = ioremap(mem->start, mem->end - mem->start + 1);
 	if (!sync) {
 		pr_debug("ioremap for sync failed\n");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto done;
 	}
 	musb->sync_va = sync;
 
@@ -1126,28 +1135,37 @@ int __init musb_platform_init(struct musb *musb)
 	if (ret) {
 		printk(KERN_ERR "Could not start tusb6010 (%d)\n",
 				ret);
-		return -ENODEV;
+		goto done;
 	}
 	musb->isr = tusb_interrupt;
 
 	if (is_host_enabled(musb))
 		musb->board_set_vbus = tusb_source_power;
-	if (is_peripheral_enabled(musb))
-		musb->xceiv.set_power = tusb_draw_power;
+	if (is_peripheral_enabled(musb)) {
+		musb->xceiv->set_power = tusb_draw_power;
+		the_musb = musb;
+	}
 
 	setup_timer(&musb_idle_timer, musb_do_idle, (unsigned long) musb);
 
+done:
+	if (ret < 0) {
+		if (sync)
+			iounmap(sync);
+		usb_nop_xceiv_unregister();
+	}
 	return ret;
 }
 
 int musb_platform_exit(struct musb *musb)
 {
 	del_timer_sync(&musb_idle_timer);
+	the_musb = NULL;
 
 	if (musb->board_set_power)
 		musb->board_set_power(0);
 
 	iounmap(musb->sync_va);
-
+	usb_nop_xceiv_unregister();
 	return 0;
 }
diff --git a/drivers/usb/otg/nop-usb-xceiv.c b/drivers/usb/otg/nop-usb-xceiv.c
index c567168f89af..9ed5ea568679 100644
--- a/drivers/usb/otg/nop-usb-xceiv.c
+++ b/drivers/usb/otg/nop-usb-xceiv.c
@@ -22,8 +22,8 @@
  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * Current status:
- * 	this is to add "nop" transceiver for all those phy which is
- * 	autonomous such as isp1504 etc.
+ *	This provides a "nop" transceiver for PHYs which are
+ *	autonomous such as isp1504, isp1707, etc.
  */
 
 #include <linux/module.h>
@@ -36,30 +36,25 @@ struct nop_usb_xceiv {
 	struct device		*dev;
 };
 
-static u64 nop_xceiv_dmamask = DMA_BIT_MASK(32);
-
-static struct platform_device nop_xceiv_device = {
-	.name           = "nop_usb_xceiv",
-	.id             = -1,
-	.dev = {
-		.dma_mask               = &nop_xceiv_dmamask,
-		.coherent_dma_mask      = DMA_BIT_MASK(32),
-		.platform_data          = NULL,
-	},
-};
+static struct platform_device *pd;
 
 void usb_nop_xceiv_register(void)
 {
-	if (platform_device_register(&nop_xceiv_device) < 0) {
+	if (pd)
+		return;
+	pd = platform_device_register_simple("nop_usb_xceiv", -1, NULL, 0);
+	if (!pd) {
 		printk(KERN_ERR "Unable to register usb nop transceiver\n");
 		return;
 	}
 }
+EXPORT_SYMBOL(usb_nop_xceiv_register);
 
 void usb_nop_xceiv_unregister(void)
 {
-	platform_device_unregister(&nop_xceiv_device);
+	platform_device_unregister(pd);
 }
+EXPORT_SYMBOL(usb_nop_xceiv_unregister);
 
 static inline struct nop_usb_xceiv *xceiv_to_nop(struct otg_transceiver *x)
 {
diff --git a/drivers/usb/otg/twl4030-usb.c b/drivers/usb/otg/twl4030-usb.c
index d9478d0e1c8b..9e3e7a5c258b 100644
--- a/drivers/usb/otg/twl4030-usb.c
+++ b/drivers/usb/otg/twl4030-usb.c
@@ -217,6 +217,7 @@
 
 /* In module TWL4030_MODULE_PM_MASTER */
 #define PROTECT_KEY			0x0E
+#define STS_HW_CONDITIONS		0x0F
 
 /* In module TWL4030_MODULE_PM_RECEIVER */
 #define VUSB_DEDICATED1			0x7D
@@ -351,15 +352,26 @@ static enum linkstat twl4030_usb_linkstat(struct twl4030_usb *twl)
 	int	status;
 	int	linkstat = USB_LINK_UNKNOWN;
 
-	/* STS_HW_CONDITIONS */
-	status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER, 0x0f);
+	/*
+	 * For ID/VBUS sensing, see manual section 15.4.8 ...
+	 * except when using only battery backup power, two
+	 * comparators produce VBUS_PRES and ID_PRES signals,
+	 * which don't match docs elsewhere.  But ... BIT(7)
+	 * and BIT(2) of STS_HW_CONDITIONS, respectively, do
+	 * seem to match up.  If either is true the USB_PRES
+	 * signal is active, the OTG module is activated, and
+	 * its interrupt may be raised (may wake the system).
+	 */
+	status = twl4030_readb(twl, TWL4030_MODULE_PM_MASTER,
+			STS_HW_CONDITIONS);
 	if (status < 0)
 		dev_err(twl->dev, "USB link status err %d\n", status);
-	else if (status & BIT(7))
-		linkstat = USB_LINK_VBUS;
-	else if (status & BIT(2))
-		linkstat = USB_LINK_ID;
-	else
+	else if (status & (BIT(7) | BIT(2))) {
+		if (status & BIT(2))
+			linkstat = USB_LINK_ID;
+		else
+			linkstat = USB_LINK_VBUS;
+	} else
 		linkstat = USB_LINK_NONE;
 
 	dev_dbg(twl->dev, "HW_CONDITIONS 0x%02x/%d; link %d\n",
@@ -641,7 +653,7 @@ static int twl4030_set_host(struct otg_transceiver *x, struct usb_bus *host)
 	return 0;
 }
 
-static int __init twl4030_usb_probe(struct platform_device *pdev)
+static int __devinit twl4030_usb_probe(struct platform_device *pdev)
 {
 	struct twl4030_usb_data *pdata = pdev->dev.platform_data;
 	struct twl4030_usb	*twl;
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index d9d87111f9a9..20e49d290044 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -47,7 +47,7 @@
 /*
  * Version Information
  */
-#define DRIVER_VERSION "v1.4.3"
+#define DRIVER_VERSION "v1.5.0"
 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Bill Ryder <bryder@sgi.com>, Kuba Ober <kuba@mareimbrium.org>"
 #define DRIVER_DESC "USB FTDI Serial Converters Driver"
 
@@ -82,7 +82,8 @@ struct ftdi_private {
 	int rx_processed;
 	unsigned long rx_bytes;
 
-	__u16 interface;	/* FT2232C port interface (0 for FT232/245) */
+	__u16 interface;	/* FT2232C, FT2232H or FT4232H port interface
+				   (0 for FT232/245) */
 
 	speed_t force_baud;	/* if non-zero, force the baud rate to
 				   this value */
@@ -93,6 +94,7 @@ struct ftdi_private {
 	unsigned long tx_bytes;
 	unsigned long tx_outstanding_bytes;
 	unsigned long tx_outstanding_urbs;
+	unsigned short max_packet_size;
 };
 
 /* struct ftdi_sio_quirk is used by devices requiring special attention. */
@@ -163,6 +165,7 @@ static struct usb_device_id id_table_combined [] = {
 	{ USB_DEVICE(FTDI_VID, FTDI_8U232AM_ALT_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_232RL_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_8U2232C_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_4232H_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_MICRO_CHAMELEON_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_RELAIS_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_OPENDCC_PID) },
@@ -692,12 +695,13 @@ static const char *ftdi_chip_name[] = {
 	[FT232BM] = "FT232BM",
 	[FT2232C] = "FT2232C",
 	[FT232RL] = "FT232RL",
+	[FT2232H] = "FT2232H",
+	[FT4232H] = "FT4232H"
 };
 
 
 /* Constants for read urb and write urb */
 #define BUFSZ 512
-#define PKTSZ 64
 
 /* rx_flags */
 #define THROTTLED		0x01
@@ -743,6 +747,8 @@ static unsigned short int ftdi_232am_baud_base_to_divisor(int baud, int base);
 static unsigned short int ftdi_232am_baud_to_divisor(int baud);
 static __u32 ftdi_232bm_baud_base_to_divisor(int baud, int base);
 static __u32 ftdi_232bm_baud_to_divisor(int baud);
+static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base);
+static __u32 ftdi_2232h_baud_to_divisor(int baud);
 
 static struct usb_serial_driver ftdi_sio_device = {
 	.driver = {
@@ -837,6 +843,36 @@ static __u32 ftdi_232bm_baud_to_divisor(int baud)
 	 return ftdi_232bm_baud_base_to_divisor(baud, 48000000);
 }
 
+static __u32 ftdi_2232h_baud_base_to_divisor(int baud, int base)
+{
+	static const unsigned char divfrac[8] = { 0, 3, 2, 4, 1, 5, 6, 7 };
+	__u32 divisor;
+	int divisor3;
+
+	/* hi-speed baud rate is 10-bit sampling instead of 16-bit */
+	divisor3 = (base / 10 / baud) * 8;
+
+	divisor = divisor3 >> 3;
+	divisor |= (__u32)divfrac[divisor3 & 0x7] << 14;
+	/* Deal with special cases for highest baud rates. */
+	if (divisor == 1)
+		divisor = 0;
+	else if (divisor == 0x4001)
+		divisor = 1;
+	/*
+	 * Set this bit to turn off a divide by 2.5 on baud rate generator
+	 * This enables baud rates up to 12Mbaud but cannot reach below 1200
+	 * baud with this bit set
+	 */
+	divisor |= 0x00020000;
+	return divisor;
+}
+
+static __u32 ftdi_2232h_baud_to_divisor(int baud)
+{
+	 return ftdi_2232h_baud_base_to_divisor(baud, 120000000);
+}
+
 #define set_mctrl(port, set)		update_mctrl((port), (set), 0)
 #define clear_mctrl(port, clear)	update_mctrl((port), 0, (clear))
 
@@ -995,6 +1031,19 @@ static __u32 get_ftdi_divisor(struct tty_struct *tty,
 			baud = 9600;
 		}
 		break;
+	case FT2232H: /* FT2232H chip */
+	case FT4232H: /* FT4232H chip */
+		if ((baud <= 12000000) & (baud >= 1200)) {
+			div_value = ftdi_2232h_baud_to_divisor(baud);
+		} else if (baud < 1200) {
+			div_value = ftdi_232bm_baud_to_divisor(baud);
+		} else {
+			dbg("%s - Baud rate too high!", __func__);
+			div_value = ftdi_232bm_baud_to_divisor(9600);
+			div_okay = 0;
+			baud = 9600;
+		}
+		break;
 	} /* priv->chip_type */
 
 	if (div_okay) {
@@ -1147,14 +1196,29 @@ static void ftdi_determine_type(struct usb_serial_port *port)
 	if (interfaces > 1) {
 		int inter;
 
-		/* Multiple interfaces.  Assume FT2232C. */
-		priv->chip_type = FT2232C;
+		/* Multiple interfaces.*/
+		if (version == 0x0800) {
+			priv->chip_type = FT4232H;
+			/* Hi-speed - baud clock runs at 120MHz */
+			priv->baud_base = 120000000 / 2;
+		} else if (version == 0x0700) {
+			priv->chip_type = FT2232H;
+			/* Hi-speed - baud clock runs at 120MHz */
+			priv->baud_base = 120000000 / 2;
+		} else
+			priv->chip_type = FT2232C;
+
 		/* Determine interface code. */
 		inter = serial->interface->altsetting->desc.bInterfaceNumber;
-		if (inter == 0)
-			priv->interface = PIT_SIOA;
-		else
-			priv->interface = PIT_SIOB;
+		if (inter == 0) {
+			priv->interface = INTERFACE_A;
+		} else  if (inter == 1) {
+			priv->interface = INTERFACE_B;
+		} else  if (inter == 2) {
+			priv->interface = INTERFACE_C;
+		} else  if (inter == 3) {
+			priv->interface = INTERFACE_D;
+		}
 		/* BM-type devices have a bug where bcdDevice gets set
 		 * to 0x200 when iSerialNumber is 0.  */
 		if (version < 0x500) {
@@ -1182,6 +1246,45 @@ static void ftdi_determine_type(struct usb_serial_port *port)
 }
 
 
+/* Determine the maximum packet size for the device.  This depends on the chip
+ * type and the USB host capabilities.  The value should be obtained from the
+ * device descriptor as the chip will use the appropriate values for the host.*/
+static void ftdi_set_max_packet_size(struct usb_serial_port *port)
+{
+	struct ftdi_private *priv = usb_get_serial_port_data(port);
+	struct usb_serial *serial = port->serial;
+	struct usb_device *udev = serial->dev;
+
+	struct usb_interface *interface = serial->interface;
+	struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
+
+	unsigned num_endpoints;
+	int i = 0;
+
+	num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
+	dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
+
+	/* NOTE: some customers have programmed FT232R/FT245R devices
+	 * with an endpoint size of 0 - not good.  In this case, we
+	 * want to override the endpoint descriptor setting and use a
+	 * value of 64 for wMaxPacketSize */
+	for (i = 0; i < num_endpoints; i++) {
+		dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
+			interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
+		ep_desc = &interface->cur_altsetting->endpoint[i].desc;
+		if (ep_desc->wMaxPacketSize == 0) {
+			ep_desc->wMaxPacketSize = cpu_to_le16(0x40);
+			dev_info(&udev->dev, "Overriding wMaxPacketSize on endpoint %d\n", i);
+		}
+	}
+
+	/* set max packet size based on descriptor */
+	priv->max_packet_size = ep_desc->wMaxPacketSize;
+
+	dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
+}
+
+
 /*
  * ***************************************************************************
  * Sysfs Attribute
@@ -1291,7 +1394,9 @@ static int create_sysfs_attrs(struct usb_serial_port *port)
 		if ((!retval) &&
 		    (priv->chip_type == FT232BM ||
 		     priv->chip_type == FT2232C ||
-		     priv->chip_type == FT232RL)) {
+		     priv->chip_type == FT232RL ||
+		     priv->chip_type == FT2232H ||
+		     priv->chip_type == FT4232H)) {
 			retval = device_create_file(&port->dev,
 						    &dev_attr_latency_timer);
 		}
@@ -1310,7 +1415,9 @@ static void remove_sysfs_attrs(struct usb_serial_port *port)
 		device_remove_file(&port->dev, &dev_attr_event_char);
 		if (priv->chip_type == FT232BM ||
 		    priv->chip_type == FT2232C ||
-		    priv->chip_type == FT232RL) {
+		    priv->chip_type == FT232RL ||
+		    priv->chip_type == FT2232H ||
+		    priv->chip_type == FT4232H) {
 			device_remove_file(&port->dev, &dev_attr_latency_timer);
 		}
 	}
@@ -1393,6 +1500,7 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
 	usb_set_serial_port_data(port, priv);
 
 	ftdi_determine_type(port);
+	ftdi_set_max_packet_size(port);
 	create_sysfs_attrs(port);
 	return 0;
 }
@@ -1650,8 +1758,8 @@ static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
 	if (data_offset > 0) {
 		/* Original sio needs control bytes too... */
 		transfer_size += (data_offset *
-				((count + (PKTSZ - 1 - data_offset)) /
-				 (PKTSZ - data_offset)));
+				((count + (priv->max_packet_size - 1 - data_offset)) /
+				 (priv->max_packet_size - data_offset)));
 	}
 
 	buffer = kmalloc(transfer_size, GFP_ATOMIC);
@@ -1673,7 +1781,7 @@ static int ftdi_write(struct tty_struct *tty, struct usb_serial_port *port,
 	if (data_offset > 0) {
 		/* Original sio requires control byte at start of
 		   each packet. */
-		int user_pktsz = PKTSZ - data_offset;
+		int user_pktsz = priv->max_packet_size - data_offset;
 		int todo = count;
 		unsigned char *first_byte = buffer;
 		const unsigned char *current_position = buf;
@@ -1754,11 +1862,6 @@ static void ftdi_write_bulk_callback(struct urb *urb)
 
 	dbg("%s - port %d", __func__, port->number);
 
-	if (status) {
-		dbg("nonzero write bulk status received: %d", status);
-		return;
-	}
-
 	priv = usb_get_serial_port_data(port);
 	if (!priv) {
 		dbg("%s - bad port private data pointer - exiting", __func__);
@@ -1769,13 +1872,18 @@ static void ftdi_write_bulk_callback(struct urb *urb)
 	data_offset = priv->write_offset;
 	if (data_offset > 0) {
 		/* Subtract the control bytes */
-		countback -= (data_offset * DIV_ROUND_UP(countback, PKTSZ));
+		countback -= (data_offset * DIV_ROUND_UP(countback, priv->max_packet_size));
 	}
 	spin_lock_irqsave(&priv->tx_lock, flags);
 	--priv->tx_outstanding_urbs;
 	priv->tx_outstanding_bytes -= countback;
 	spin_unlock_irqrestore(&priv->tx_lock, flags);
 
+	if (status) {
+		dbg("nonzero write bulk status received: %d", status);
+		return;
+	}
+
 	usb_serial_port_softint(port);
 } /* ftdi_write_bulk_callback */
 
@@ -1871,7 +1979,7 @@ static void ftdi_read_bulk_callback(struct urb *urb)
 
 	/* count data bytes, but not status bytes */
 	countread = urb->actual_length;
-	countread -= 2 * DIV_ROUND_UP(countread, PKTSZ);
+	countread -= 2 * DIV_ROUND_UP(countread, priv->max_packet_size);
 	spin_lock_irqsave(&priv->rx_lock, flags);
 	priv->rx_bytes += countread;
 	spin_unlock_irqrestore(&priv->rx_lock, flags);
@@ -1944,7 +2052,7 @@ static void ftdi_process_read(struct work_struct *work)
 
 	need_flip = 0;
 	for (packet_offset = priv->rx_processed;
-		packet_offset < urb->actual_length; packet_offset += PKTSZ) {
+		packet_offset < urb->actual_length; packet_offset += priv->max_packet_size) {
 		int length;
 
 		/* Compare new line status to the old one, signal if different/
@@ -1959,7 +2067,7 @@ static void ftdi_process_read(struct work_struct *work)
 			priv->prev_status = new_status;
 		}
 
-		length = min_t(u32, PKTSZ, urb->actual_length-packet_offset)-2;
+		length = min_t(u32, priv->max_packet_size, urb->actual_length-packet_offset)-2;
 		if (length < 0) {
 			dev_err(&port->dev, "%s - bad packet length: %d\n",
 				__func__, length+2);
@@ -1990,6 +2098,7 @@ static void ftdi_process_read(struct work_struct *work)
 		if (data[packet_offset+1] & FTDI_RS_BI) {
 			error_flag = TTY_BREAK;
 			dbg("BREAK received");
+			usb_serial_handle_break(port);
 		}
 		if (data[packet_offset+1] & FTDI_RS_PE) {
 			error_flag = TTY_PARITY;
@@ -2004,8 +2113,11 @@ static void ftdi_process_read(struct work_struct *work)
 				/* Note that the error flag is duplicated for
 				   every character received since we don't know
 				   which character it applied to */
-				tty_insert_flip_char(tty,
-					data[packet_offset + i], error_flag);
+				if (!usb_serial_handle_sysrq_char(port,
+						data[packet_offset + i]))
+					tty_insert_flip_char(tty,
+						data[packet_offset + i],
+						error_flag);
 			}
 			need_flip = 1;
 		}
@@ -2311,6 +2423,8 @@ static int ftdi_tiocmget(struct tty_struct *tty, struct file *file)
 	case FT232BM:
 	case FT2232C:
 	case FT232RL:
+	case FT2232H:
+	case FT4232H:
 		/* the 8U232AM returns a two byte value (the sio is a 1 byte
 		   value) - in the same format as the data returned from the in
 		   point */
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 12330fa1c095..2d1f676beaed 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -10,7 +10,7 @@
  * The device is based on the FTDI FT8U100AX chip. It has a DB25 on one side,
  * USB on the other.
  *
- * Thanx to FTDI (http://www.ftdi.co.uk) for so kindly providing details
+ * Thanx to FTDI (http://www.ftdichip.com) for so kindly providing details
  * of the protocol required to talk to the device and ongoing assistence
  * during development.
  *
@@ -28,6 +28,7 @@
 #define FTDI_8U232AM_ALT_PID 0x6006 /* FTDI's alternate PID for above */
 #define FTDI_8U2232C_PID 0x6010 /* Dual channel device */
 #define FTDI_232RL_PID  0xFBFA  /* Product ID for FT232RL */
+#define FTDI_4232H_PID 0x6011 /* Quad channel hi-speed device */
 #define FTDI_RELAIS_PID	0xFA10  /* Relais device from Rudolf Gugler */
 #define FTDI_NF_RIC_VID	0x0DCD	/* Vendor Id */
 #define FTDI_NF_RIC_PID	0x0001	/* Product Id */
@@ -873,6 +874,11 @@
 #define FTDI_SIO_SET_LATENCY_TIMER	9 /* Set the latency timer */
 #define FTDI_SIO_GET_LATENCY_TIMER	10 /* Get the latency timer */
 
+/* Interface indicies for FT2232, FT2232H and FT4232H devices*/
+#define INTERFACE_A		1
+#define INTERFACE_B		2
+#define INTERFACE_C		3
+#define INTERFACE_D		4
 
 /*
  * FIC / OpenMoko, Inc. http://wiki.openmoko.org/wiki/Neo1973_Debug_Board_v3
@@ -1036,6 +1042,8 @@ typedef enum {
 	FT232BM = 3,
 	FT2232C = 4,
 	FT232RL = 5,
+	FT2232H = 6,
+	FT4232H = 7
 } ftdi_chip_type_t;
 
 typedef enum {
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index ee25a3fe3b09..5092d6aba659 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1,7 +1,7 @@
 /*
  * Garmin GPS driver
  *
- * Copyright (C) 2006,2007 Hermann Kneissel herkne@users.sourceforge.net
+ * Copyright (C) 2006-2009 Hermann Kneissel herkne@users.sourceforge.net
  *
  * The latest version of the driver can be found at
  * http://sourceforge.net/projects/garmin-gps/
@@ -51,7 +51,7 @@ static int debug;
  */
 
 #define VERSION_MAJOR	0
-#define VERSION_MINOR	31
+#define VERSION_MINOR	33
 
 #define _STR(s) #s
 #define _DRIVER_VERSION(a, b) "v" _STR(a) "." _STR(b)
@@ -129,7 +129,6 @@ struct garmin_data {
 	__u8   state;
 	__u16  flags;
 	__u8   mode;
-	__u8   ignorePkts;
 	__u8   count;
 	__u8   pkt_id;
 	__u32  serial_num;
@@ -141,8 +140,6 @@ struct garmin_data {
 	__u8   inbuffer [GPS_IN_BUFSIZ];  /* tty -> usb */
 	__u8   outbuffer[GPS_OUT_BUFSIZ]; /* usb -> tty */
 	__u8   privpkt[4*6];
-	atomic_t req_count;
-	atomic_t resp_count;
 	spinlock_t lock;
 	struct list_head pktlist;
 };
@@ -170,6 +167,8 @@ struct garmin_data {
 #define FLAGS_BULK_IN_ACTIVE      0x0020
 #define FLAGS_BULK_IN_RESTART     0x0010
 #define FLAGS_THROTTLED           0x0008
+#define APP_REQ_SEEN              0x0004
+#define APP_RESP_SEEN             0x0002
 #define CLEAR_HALT_REQUIRED       0x0001
 
 #define FLAGS_QUEUING             0x0100
@@ -184,20 +183,16 @@ struct garmin_data {
 
 
 /* function prototypes */
-static void gsp_next_packet(struct garmin_data *garmin_data_p);
-static int  garmin_write_bulk(struct usb_serial_port *port,
+static int gsp_next_packet(struct garmin_data *garmin_data_p);
+static int garmin_write_bulk(struct usb_serial_port *port,
 			     const unsigned char *buf, int count,
 			     int dismiss_ack);
 
 /* some special packets to be send or received */
 static unsigned char const GARMIN_START_SESSION_REQ[]
 	= { 0, 0, 0, 0,  5, 0, 0, 0, 0, 0, 0, 0 };
-static unsigned char const GARMIN_START_SESSION_REQ2[]
-	= { 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0 };
 static unsigned char const GARMIN_START_SESSION_REPLY[]
 	= { 0, 0, 0, 0,  6, 0, 0, 0, 4, 0, 0, 0 };
-static unsigned char const GARMIN_SESSION_ACTIVE_REPLY[]
-	= { 0, 0, 0, 0, 17, 0, 0, 0, 4, 0, 0, 0, 0, 16, 0, 0 };
 static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[]
 	= { 0, 0, 0, 0,  2, 0, 0, 0, 0, 0, 0, 0 };
 static unsigned char const GARMIN_APP_LAYER_REPLY[]
@@ -233,13 +228,6 @@ static struct usb_driver garmin_driver = {
 };
 
 
-static inline int noResponseFromAppLayer(struct garmin_data *garmin_data_p)
-{
-	return atomic_read(&garmin_data_p->req_count) ==
-				atomic_read(&garmin_data_p->resp_count);
-}
-
-
 static inline int getLayerId(const __u8 *usbPacket)
 {
 	return __le32_to_cpup((__le32 *)(usbPacket));
@@ -325,8 +313,11 @@ static int pkt_add(struct garmin_data *garmin_data_p,
 		state = garmin_data_p->state;
 		spin_unlock_irqrestore(&garmin_data_p->lock, flags);
 
+		dbg("%s - added: pkt: %d - %d bytes",
+			__func__, pkt->seq, data_length);
+
 		/* in serial mode, if someone is waiting for data from
-		   the device, iconvert and send the next packet to tty. */
+		   the device, convert and send the next packet to tty. */
 		if (result && (state == STATE_GSP_WAIT_DATA))
 			gsp_next_packet(garmin_data_p);
 	}
@@ -411,7 +402,7 @@ static int gsp_send_ack(struct garmin_data *garmin_data_p, __u8 pkt_id)
 /*
  * called for a complete packet received from tty layer
  *
- * the complete packet (pkzid ... cksum) is in garmin_data_p->inbuf starting
+ * the complete packet (pktid ... cksum) is in garmin_data_p->inbuf starting
  * at GSP_INITIAL_OFFSET.
  *
  * count - number of bytes in the input buffer including space reserved for
@@ -501,7 +492,6 @@ static int gsp_receive(struct garmin_data *garmin_data_p,
 	unsigned long flags;
 	int offs = 0;
 	int ack_or_nak_seen = 0;
-	int i = 0;
 	__u8 *dest;
 	int size;
 	/* dleSeen: set if last byte read was a DLE */
@@ -519,8 +509,8 @@ static int gsp_receive(struct garmin_data *garmin_data_p,
 	skip = garmin_data_p->flags & FLAGS_GSP_SKIP;
 	spin_unlock_irqrestore(&garmin_data_p->lock, flags);
 
-	dbg("%s - dle=%d skip=%d size=%d count=%d",
-		__func__, dleSeen, skip, size, count);
+	/* dbg("%s - dle=%d skip=%d size=%d count=%d",
+		__func__, dleSeen, skip, size, count); */
 
 	if (size == 0)
 		size = GSP_INITIAL_OFFSET;
@@ -568,7 +558,6 @@ static int gsp_receive(struct garmin_data *garmin_data_p,
 		} else if (!skip) {
 
 			if (dleSeen) {
-				dbg("non-masked DLE at %d - restarting", i);
 				size = GSP_INITIAL_OFFSET;
 				dleSeen = 0;
 			}
@@ -599,19 +588,19 @@ static int gsp_receive(struct garmin_data *garmin_data_p,
 	else
 		garmin_data_p->flags &= ~FLAGS_GSP_DLESEEN;
 
-	if (ack_or_nak_seen)
-		garmin_data_p->state = STATE_GSP_WAIT_DATA;
-
 	spin_unlock_irqrestore(&garmin_data_p->lock, flags);
 
-	if (ack_or_nak_seen)
-		gsp_next_packet(garmin_data_p);
+	if (ack_or_nak_seen) {
+		if (gsp_next_packet(garmin_data_p) > 0)
+			garmin_data_p->state = STATE_ACTIVE;
+		else
+			garmin_data_p->state = STATE_GSP_WAIT_DATA;
+	}
 	return count;
 }
 
 
 
-
 /*
  * Sends a usb packet to the tty
  *
@@ -733,29 +722,28 @@ static int gsp_send(struct garmin_data *garmin_data_p,
 }
 
 
-
-
-
 /*
  * Process the next pending data packet - if there is one
  */
-static void gsp_next_packet(struct garmin_data *garmin_data_p)
+static int gsp_next_packet(struct garmin_data *garmin_data_p)
 {
+	int result = 0;
 	struct garmin_packet *pkt = NULL;
 
 	while ((pkt = pkt_pop(garmin_data_p)) != NULL) {
 		dbg("%s - next pkt: %d", __func__, pkt->seq);
-		if (gsp_send(garmin_data_p, pkt->data, pkt->size) > 0) {
+		result = gsp_send(garmin_data_p, pkt->data, pkt->size);
+		if (result > 0) {
 			kfree(pkt);
-			return;
+			return result;
 		}
 		kfree(pkt);
 	}
+	return result;
 }
 
 
 
-
 /******************************************************************************
  * garmin native mode
  ******************************************************************************/
@@ -888,14 +876,6 @@ static int garmin_clear(struct garmin_data *garmin_data_p)
 	unsigned long flags;
 	int status = 0;
 
-	struct usb_serial_port *port = garmin_data_p->port;
-
-	if (port != NULL && atomic_read(&garmin_data_p->resp_count)) {
-		/* send a terminate command */
-		status = garmin_write_bulk(port, GARMIN_STOP_TRANSFER_REQ,
-					sizeof(GARMIN_STOP_TRANSFER_REQ), 1);
-	}
-
 	/* flush all queued data */
 	pkt_clear(garmin_data_p);
 
@@ -908,16 +888,12 @@ static int garmin_clear(struct garmin_data *garmin_data_p)
 }
 
 
-
-
-
-
 static int garmin_init_session(struct usb_serial_port *port)
 {
-	unsigned long flags;
 	struct usb_serial *serial = port->serial;
 	struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
 	int status = 0;
+	int i = 0;
 
 	if (status == 0) {
 		usb_kill_urb(port->interrupt_in_urb);
@@ -931,30 +907,25 @@ static int garmin_init_session(struct usb_serial_port *port)
 							__func__, status);
 	}
 
+	/*
+	 * using the initialization method from gpsbabel. See comments in
+	 * gpsbabel/jeeps/gpslibusb.c gusb_reset_toggles()
+	 */
 	if (status == 0) {
 		dbg("%s - starting session ...", __func__);
 		garmin_data_p->state = STATE_ACTIVE;
-		status = garmin_write_bulk(port, GARMIN_START_SESSION_REQ,
-					sizeof(GARMIN_START_SESSION_REQ), 0);
 
-		if (status >= 0) {
-
-			spin_lock_irqsave(&garmin_data_p->lock, flags);
-			garmin_data_p->ignorePkts++;
-			spin_unlock_irqrestore(&garmin_data_p->lock, flags);
-
-			/* not needed, but the win32 driver does it too ... */
+		for (i = 0; i < 3; i++) {
 			status = garmin_write_bulk(port,
-					GARMIN_START_SESSION_REQ2,
-					sizeof(GARMIN_START_SESSION_REQ2), 0);
-			if (status >= 0) {
-				status = 0;
-				spin_lock_irqsave(&garmin_data_p->lock, flags);
-				garmin_data_p->ignorePkts++;
-				spin_unlock_irqrestore(&garmin_data_p->lock,
-									flags);
-			}
+					GARMIN_START_SESSION_REQ,
+					sizeof(GARMIN_START_SESSION_REQ), 0);
+
+			if (status < 0)
+				break;
 		}
+
+		if (status > 0)
+			status = 0;
 	}
 
 	return status;
@@ -962,8 +933,6 @@ static int garmin_init_session(struct usb_serial_port *port)
 
 
 
-
-
 static int garmin_open(struct tty_struct *tty,
 			struct usb_serial_port *port, struct file *filp)
 {
@@ -977,8 +946,6 @@ static int garmin_open(struct tty_struct *tty,
 	garmin_data_p->mode  = initial_mode;
 	garmin_data_p->count = 0;
 	garmin_data_p->flags = 0;
-	atomic_set(&garmin_data_p->req_count, 0);
-	atomic_set(&garmin_data_p->resp_count, 0);
 	spin_unlock_irqrestore(&garmin_data_p->lock, flags);
 
 	/* shutdown any bulk reads that might be going on */
@@ -1006,6 +973,7 @@ static void garmin_close(struct usb_serial_port *port)
 		return;
 
 	mutex_lock(&port->serial->disc_mutex);
+
 	if (!port->serial->disconnected)
 		garmin_clear(garmin_data_p);
 
@@ -1013,25 +981,17 @@ static void garmin_close(struct usb_serial_port *port)
 	usb_kill_urb(port->read_urb);
 	usb_kill_urb(port->write_urb);
 
-	if (!port->serial->disconnected) {
-		if (noResponseFromAppLayer(garmin_data_p) ||
-		    ((garmin_data_p->flags & CLEAR_HALT_REQUIRED) != 0)) {
-			process_resetdev_request(port);
-			garmin_data_p->state = STATE_RESET;
-		} else {
-			garmin_data_p->state = STATE_DISCONNECTED;
-		}
-	} else {
+	/* keep reset state so we know that we must start a new session */
+	if (garmin_data_p->state != STATE_RESET)
 		garmin_data_p->state = STATE_DISCONNECTED;
-	}
+
 	mutex_unlock(&port->serial->disc_mutex);
 }
 
+
 static void garmin_write_bulk_callback(struct urb *urb)
 {
-	unsigned long flags;
 	struct usb_serial_port *port = urb->context;
-	int status = urb->status;
 
 	if (port) {
 		struct garmin_data *garmin_data_p =
@@ -1039,20 +999,13 @@ static void garmin_write_bulk_callback(struct urb *urb)
 
 		dbg("%s - port %d", __func__, port->number);
 
-		if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer)
-		    && (garmin_data_p->mode == MODE_GARMIN_SERIAL))  {
-			gsp_send_ack(garmin_data_p,
-					((__u8 *)urb->transfer_buffer)[4]);
-		}
+		if (GARMIN_LAYERID_APPL == getLayerId(urb->transfer_buffer)) {
 
-		if (status) {
-			dbg("%s - nonzero write bulk status received: %d",
-			    __func__, status);
-			spin_lock_irqsave(&garmin_data_p->lock, flags);
-			garmin_data_p->flags |= CLEAR_HALT_REQUIRED;
-			spin_unlock_irqrestore(&garmin_data_p->lock, flags);
+			if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
+				gsp_send_ack(garmin_data_p,
+					((__u8 *)urb->transfer_buffer)[4]);
+			}
 		}
-
 		usb_serial_port_softint(port);
 	}
 
@@ -1108,7 +1061,11 @@ static int garmin_write_bulk(struct usb_serial_port *port,
 	urb->transfer_flags |= URB_ZERO_PACKET;
 
 	if (GARMIN_LAYERID_APPL == getLayerId(buffer)) {
-		atomic_inc(&garmin_data_p->req_count);
+
+		spin_lock_irqsave(&garmin_data_p->lock, flags);
+		garmin_data_p->flags |= APP_REQ_SEEN;
+		spin_unlock_irqrestore(&garmin_data_p->lock, flags);
+
 		if (garmin_data_p->mode == MODE_GARMIN_SERIAL)  {
 			pkt_clear(garmin_data_p);
 			garmin_data_p->state = STATE_GSP_WAIT_DATA;
@@ -1140,6 +1097,9 @@ static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port,
 
 	usb_serial_debug_data(debug, &port->dev, __func__, count, buf);
 
+	if (garmin_data_p->state == STATE_RESET)
+		return -EIO;
+
 	/* check for our private packets */
 	if (count >= GARMIN_PKTHDR_LENGTH) {
 		len = PRIVPKTSIZ;
@@ -1184,7 +1144,7 @@ static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port,
 				break;
 
 			case PRIV_PKTID_RESET_REQ:
-				atomic_inc(&garmin_data_p->req_count);
+				process_resetdev_request(port);
 				break;
 
 			case PRIV_PKTID_SET_DEF_MODE:
@@ -1200,8 +1160,6 @@ static int garmin_write(struct tty_struct *tty, struct usb_serial_port *port,
 		}
 	}
 
-	garmin_data_p->ignorePkts = 0;
-
 	if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
 		return gsp_receive(garmin_data_p, buf, count);
 	} else {	/* MODE_NATIVE */
@@ -1224,31 +1182,33 @@ static int garmin_write_room(struct tty_struct *tty)
 static void garmin_read_process(struct garmin_data *garmin_data_p,
 				 unsigned char *data, unsigned data_length)
 {
+	unsigned long flags;
+
 	if (garmin_data_p->flags & FLAGS_DROP_DATA) {
 		/* abort-transfer cmd is actice */
 		dbg("%s - pkt dropped", __func__);
 	} else if (garmin_data_p->state != STATE_DISCONNECTED &&
 		garmin_data_p->state != STATE_RESET) {
 
-		/* remember any appl.layer packets, so we know
-		   if a reset is required or not when closing
-		   the device */
-		if (0 == memcmp(data, GARMIN_APP_LAYER_REPLY,
-				sizeof(GARMIN_APP_LAYER_REPLY))) {
-			atomic_inc(&garmin_data_p->resp_count);
-		}
-
 		/* if throttling is active or postprecessing is required
 		   put the received data in the input queue, otherwise
 		   send it directly to the tty port */
 		if (garmin_data_p->flags & FLAGS_QUEUING) {
 			pkt_add(garmin_data_p, data, data_length);
-		} else if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
-			if (getLayerId(data) == GARMIN_LAYERID_APPL)
+		} else if (getLayerId(data) == GARMIN_LAYERID_APPL) {
+
+			spin_lock_irqsave(&garmin_data_p->lock, flags);
+			garmin_data_p->flags |= APP_RESP_SEEN;
+			spin_unlock_irqrestore(&garmin_data_p->lock, flags);
+
+			if (garmin_data_p->mode == MODE_GARMIN_SERIAL) {
 				pkt_add(garmin_data_p, data, data_length);
-		} else {
-			send_to_tty(garmin_data_p->port, data, data_length);
+			} else {
+				send_to_tty(garmin_data_p->port, data,
+						data_length);
+			}
 		}
+		/* ignore system layer packets ... */
 	}
 }
 
@@ -1363,8 +1323,6 @@ static void garmin_read_int_callback(struct urb *urb)
 			} else {
 				spin_lock_irqsave(&garmin_data_p->lock, flags);
 				garmin_data_p->flags |= FLAGS_BULK_IN_ACTIVE;
-				/* do not send this packet to the user */
-				garmin_data_p->ignorePkts = 1;
 				spin_unlock_irqrestore(&garmin_data_p->lock,
 									flags);
 			}
@@ -1391,17 +1349,7 @@ static void garmin_read_int_callback(struct urb *urb)
 			__func__, garmin_data_p->serial_num);
 	}
 
-	if (garmin_data_p->ignorePkts) {
-		/* this reply belongs to a request generated by the driver,
-		   ignore it. */
-		dbg("%s - pkt ignored (%d)",
-			__func__, garmin_data_p->ignorePkts);
-		spin_lock_irqsave(&garmin_data_p->lock, flags);
-		garmin_data_p->ignorePkts--;
-		spin_unlock_irqrestore(&garmin_data_p->lock, flags);
-	} else {
-		garmin_read_process(garmin_data_p, data, urb->actual_length);
-	}
+	garmin_read_process(garmin_data_p, data, urb->actual_length);
 
 	port->interrupt_in_urb->dev = port->serial->dev;
 	retval = usb_submit_urb(urb, GFP_ATOMIC);
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index be82ea956720..9fccc26235a2 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -190,6 +190,88 @@ void usb_serial_generic_close(struct usb_serial_port *port)
 	generic_cleanup(port);
 }
 
+static int usb_serial_multi_urb_write(struct tty_struct *tty,
+	struct usb_serial_port *port, const unsigned char *buf, int count)
+{
+	unsigned long flags;
+	struct urb *urb;
+	unsigned char *buffer;
+	int status;
+	int towrite;
+	int bwrite = 0;
+
+	dbg("%s - port %d", __func__, port->number);
+
+	if (count == 0)
+		dbg("%s - write request of 0 bytes", __func__);
+
+	while (count > 0) {
+		towrite = (count > port->bulk_out_size) ?
+			port->bulk_out_size : count;
+		spin_lock_irqsave(&port->lock, flags);
+		if (port->urbs_in_flight >
+		    port->serial->type->max_in_flight_urbs) {
+			spin_unlock_irqrestore(&port->lock, flags);
+			dbg("%s - write limit hit\n", __func__);
+			return bwrite;
+		}
+		port->tx_bytes_flight += towrite;
+		port->urbs_in_flight++;
+		spin_unlock_irqrestore(&port->lock, flags);
+
+		buffer = kmalloc(towrite, GFP_ATOMIC);
+		if (!buffer) {
+			dev_err(&port->dev,
+			"%s ran out of kernel memory for urb ...\n", __func__);
+			goto error_no_buffer;
+		}
+
+		urb = usb_alloc_urb(0, GFP_ATOMIC);
+		if (!urb) {
+			dev_err(&port->dev, "%s - no more free urbs\n",
+				__func__);
+			goto error_no_urb;
+		}
+
+		/* Copy data */
+		memcpy(buffer, buf + bwrite, towrite);
+		usb_serial_debug_data(debug, &port->dev, __func__,
+				      towrite, buffer);
+		/* fill the buffer and send it */
+		usb_fill_bulk_urb(urb, port->serial->dev,
+			usb_sndbulkpipe(port->serial->dev,
+					port->bulk_out_endpointAddress),
+			buffer, towrite,
+			usb_serial_generic_write_bulk_callback, port);
+
+		status = usb_submit_urb(urb, GFP_ATOMIC);
+		if (status) {
+			dev_err(&port->dev,
+				"%s - failed submitting write urb, error %d\n",
+				__func__, status);
+			goto error;
+		}
+
+		/* This urb is the responsibility of the host driver now */
+		usb_free_urb(urb);
+		dbg("%s write: %d", __func__, towrite);
+		count -= towrite;
+		bwrite += towrite;
+	}
+	return bwrite;
+
+error:
+	usb_free_urb(urb);
+error_no_urb:
+	kfree(buffer);
+error_no_buffer:
+	spin_lock_irqsave(&port->lock, flags);
+	port->urbs_in_flight--;
+	port->tx_bytes_flight -= towrite;
+	spin_unlock_irqrestore(&port->lock, flags);
+	return bwrite;
+}
+
 int usb_serial_generic_write(struct tty_struct *tty,
 	struct usb_serial_port *port, const unsigned char *buf, int count)
 {
@@ -207,6 +289,11 @@ int usb_serial_generic_write(struct tty_struct *tty,
 	/* only do something if we have a bulk out endpoint */
 	if (serial->num_bulk_out) {
 		unsigned long flags;
+
+		if (serial->type->max_in_flight_urbs)
+			return usb_serial_multi_urb_write(tty, port,
+							  buf, count);
+
 		spin_lock_irqsave(&port->lock, flags);
 		if (port->write_urb_busy) {
 			spin_unlock_irqrestore(&port->lock, flags);
@@ -252,20 +339,26 @@ int usb_serial_generic_write(struct tty_struct *tty,
 	/* no bulk out, so return 0 bytes written */
 	return 0;
 }
+EXPORT_SYMBOL_GPL(usb_serial_generic_write);
 
 int usb_serial_generic_write_room(struct tty_struct *tty)
 {
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = port->serial;
+	unsigned long flags;
 	int room = 0;
 
 	dbg("%s - port %d", __func__, port->number);
-
-	/* FIXME: Locking */
-	if (serial->num_bulk_out) {
-		if (!(port->write_urb_busy))
-			room = port->bulk_out_size;
+	spin_lock_irqsave(&port->lock, flags);
+	if (serial->type->max_in_flight_urbs) {
+		if (port->urbs_in_flight < serial->type->max_in_flight_urbs)
+			room = port->bulk_out_size *
+				(serial->type->max_in_flight_urbs -
+				 port->urbs_in_flight);
+	} else if (serial->num_bulk_out && !(port->write_urb_busy)) {
+		room = port->bulk_out_size;
 	}
+	spin_unlock_irqrestore(&port->lock, flags);
 
 	dbg("%s - returns %d", __func__, room);
 	return room;
@@ -276,11 +369,16 @@ int usb_serial_generic_chars_in_buffer(struct tty_struct *tty)
 	struct usb_serial_port *port = tty->driver_data;
 	struct usb_serial *serial = port->serial;
 	int chars = 0;
+	unsigned long flags;
 
 	dbg("%s - port %d", __func__, port->number);
 
-	/* FIXME: Locking */
-	if (serial->num_bulk_out) {
+	if (serial->type->max_in_flight_urbs) {
+		spin_lock_irqsave(&port->lock, flags);
+		chars = port->tx_bytes_flight;
+		spin_unlock_irqrestore(&port->lock, flags);
+	} else if (serial->num_bulk_out) {
+		/* FIXME: Locking */
 		if (port->write_urb_busy)
 			chars = port->write_urb->transfer_buffer_length;
 	}
@@ -290,7 +388,8 @@ int usb_serial_generic_chars_in_buffer(struct tty_struct *tty)
 }
 
 
-static void resubmit_read_urb(struct usb_serial_port *port, gfp_t mem_flags)
+void usb_serial_generic_resubmit_read_urb(struct usb_serial_port *port,
+			gfp_t mem_flags)
 {
 	struct urb *urb = port->read_urb;
 	struct usb_serial *serial = port->serial;
@@ -311,25 +410,28 @@ static void resubmit_read_urb(struct usb_serial_port *port, gfp_t mem_flags)
 			"%s - failed resubmitting read urb, error %d\n",
 							__func__, result);
 }
+EXPORT_SYMBOL_GPL(usb_serial_generic_resubmit_read_urb);
 
 /* Push data to tty layer and resubmit the bulk read URB */
 static void flush_and_resubmit_read_urb(struct usb_serial_port *port)
 {
 	struct urb *urb = port->read_urb;
 	struct tty_struct *tty = tty_port_tty_get(&port->port);
-	int room;
+	char *ch = (char *)urb->transfer_buffer;
+	int i;
+
+	if (!tty)
+		goto done;
 
 	/* Push data to tty */
-	if (tty && urb->actual_length) {
-		room = tty_buffer_request_room(tty, urb->actual_length);
-		if (room) {
-			tty_insert_flip_string(tty, urb->transfer_buffer, room);
-			tty_flip_buffer_push(tty);
-		}
+	for (i = 0; i < urb->actual_length; i++, ch++) {
+		if (!usb_serial_handle_sysrq_char(port, *ch))
+			tty_insert_flip_char(tty, *ch, TTY_NORMAL);
 	}
+	tty_flip_buffer_push(tty);
 	tty_kref_put(tty);
-
-	resubmit_read_urb(port, GFP_ATOMIC);
+done:
+	usb_serial_generic_resubmit_read_urb(port, GFP_ATOMIC);
 }
 
 void usb_serial_generic_read_bulk_callback(struct urb *urb)
@@ -363,12 +465,24 @@ EXPORT_SYMBOL_GPL(usb_serial_generic_read_bulk_callback);
 
 void usb_serial_generic_write_bulk_callback(struct urb *urb)
 {
+	unsigned long flags;
 	struct usb_serial_port *port = urb->context;
 	int status = urb->status;
 
 	dbg("%s - port %d", __func__, port->number);
 
-	port->write_urb_busy = 0;
+	if (port->serial->type->max_in_flight_urbs) {
+		spin_lock_irqsave(&port->lock, flags);
+		--port->urbs_in_flight;
+		port->tx_bytes_flight -= urb->transfer_buffer_length;
+		if (port->urbs_in_flight < 0)
+			port->urbs_in_flight = 0;
+		spin_unlock_irqrestore(&port->lock, flags);
+	} else {
+		/* Handle the case for single urb mode */
+		port->write_urb_busy = 0;
+	}
+
 	if (status) {
 		dbg("%s - nonzero write bulk status received: %d",
 		    __func__, status);
@@ -408,10 +522,35 @@ void usb_serial_generic_unthrottle(struct tty_struct *tty)
 
 	if (was_throttled) {
 		/* Resume reading from device */
-		resubmit_read_urb(port, GFP_KERNEL);
+		usb_serial_generic_resubmit_read_urb(port, GFP_KERNEL);
 	}
 }
 
+int usb_serial_handle_sysrq_char(struct usb_serial_port *port, unsigned int ch)
+{
+	if (port->sysrq) {
+		if (ch && time_before(jiffies, port->sysrq)) {
+			handle_sysrq(ch, tty_port_tty_get(&port->port));
+			port->sysrq = 0;
+			return 1;
+		}
+		port->sysrq = 0;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_serial_handle_sysrq_char);
+
+int usb_serial_handle_break(struct usb_serial_port *port)
+{
+	if (!port->sysrq) {
+		port->sysrq = jiffies + HZ*5;
+		return 1;
+	}
+	port->sysrq = 0;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(usb_serial_handle_break);
+
 void usb_serial_generic_shutdown(struct usb_serial *serial)
 {
 	int i;
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 10b78a37214f..5fe9fe3df772 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -238,7 +238,7 @@ static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
 {
 	struct usb_device *dev = port->serial->dev;
 	val = val & 0x00ff;
-	dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
+	dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
 
 	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
 			       MCS_WR_RTYPE, val, reg, NULL, 0,
@@ -260,7 +260,7 @@ static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
 	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
 			      MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
 			      MOS_WDR_TIMEOUT);
-	dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
+	dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
 	*val = (*val) & 0x00ff;
 	return ret;
 }
@@ -282,18 +282,18 @@ static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
 	if (port->serial->num_ports == 4) {
 		val |= (((__u16) port->number -
 				(__u16) (port->serial->minor)) + 1) << 8;
-		dbg("mos7840_set_uart_reg application number is %x\n", val);
+		dbg("mos7840_set_uart_reg application number is %x", val);
 	} else {
 		if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
 			val |= (((__u16) port->number -
 			      (__u16) (port->serial->minor)) + 1) << 8;
-			dbg("mos7840_set_uart_reg application number is %x\n",
+			dbg("mos7840_set_uart_reg application number is %x",
 			    val);
 		} else {
 			val |=
 			    (((__u16) port->number -
 			      (__u16) (port->serial->minor)) + 2) << 8;
-			dbg("mos7840_set_uart_reg application number is %x\n",
+			dbg("mos7840_set_uart_reg application number is %x",
 			    val);
 		}
 	}
@@ -315,24 +315,24 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
 	int ret = 0;
 	__u16 Wval;
 
-	/* dbg("application number is %4x \n",
+	/* dbg("application number is %4x",
 	    (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
 	/* Wval  is same as application number */
 	if (port->serial->num_ports == 4) {
 		Wval =
 		    (((__u16) port->number - (__u16) (port->serial->minor)) +
 		     1) << 8;
-		dbg("mos7840_get_uart_reg application number is %x\n", Wval);
+		dbg("mos7840_get_uart_reg application number is %x", Wval);
 	} else {
 		if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
 			Wval = (((__u16) port->number -
 			      (__u16) (port->serial->minor)) + 1) << 8;
-			dbg("mos7840_get_uart_reg application number is %x\n",
+			dbg("mos7840_get_uart_reg application number is %x",
 			    Wval);
 		} else {
 			Wval = (((__u16) port->number -
 			      (__u16) (port->serial->minor)) + 2) << 8;
-			dbg("mos7840_get_uart_reg application number is %x\n",
+			dbg("mos7840_get_uart_reg application number is %x",
 			    Wval);
 		}
 	}
@@ -346,11 +346,11 @@ static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
 {
 
-	dbg("***************************************\n");
-	dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
-	dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
-	dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
-	dbg("***************************************\n");
+	dbg("***************************************");
+	dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
+	dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
+	dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
+	dbg("***************************************");
 
 }
 
@@ -474,12 +474,12 @@ static void mos7840_control_callback(struct urb *urb)
 		goto exit;
 	}
 
-	dbg("%s urb buffer size is %d\n", __func__, urb->actual_length);
-	dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__,
+	dbg("%s urb buffer size is %d", __func__, urb->actual_length);
+	dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
 	    mos7840_port->MsrLsr, mos7840_port->port_num);
 	data = urb->transfer_buffer;
 	regval = (__u8) data[0];
-	dbg("%s data is %x\n", __func__, regval);
+	dbg("%s data is %x", __func__, regval);
 	if (mos7840_port->MsrLsr == 0)
 		mos7840_handle_new_msr(mos7840_port, regval);
 	else if (mos7840_port->MsrLsr == 1)
@@ -538,7 +538,7 @@ static void mos7840_interrupt_callback(struct urb *urb)
 	__u16 wval, wreg = 0;
 	int status = urb->status;
 
-	dbg("%s", " : Entering\n");
+	dbg("%s", " : Entering");
 
 	switch (status) {
 	case 0:
@@ -570,7 +570,7 @@ static void mos7840_interrupt_callback(struct urb *urb)
 	 * Byte 5 FIFO status for both */
 
 	if (length && length > 5) {
-		dbg("%s \n", "Wrong data !!!");
+		dbg("%s", "Wrong data !!!");
 		return;
 	}
 
@@ -587,17 +587,17 @@ static void mos7840_interrupt_callback(struct urb *urb)
 		      (__u16) (serial->minor)) + 1) << 8;
 		if (mos7840_port->open) {
 			if (sp[i] & 0x01) {
-				dbg("SP%d No Interrupt !!!\n", i);
+				dbg("SP%d No Interrupt !!!", i);
 			} else {
 				switch (sp[i] & 0x0f) {
 				case SERIAL_IIR_RLS:
 					dbg("Serial Port %d: Receiver status error or ", i);
-					dbg("address bit detected in 9-bit mode\n");
+					dbg("address bit detected in 9-bit mode");
 					mos7840_port->MsrLsr = 1;
 					wreg = LINE_STATUS_REGISTER;
 					break;
 				case SERIAL_IIR_MS:
-					dbg("Serial Port %d: Modem status change\n", i);
+					dbg("Serial Port %d: Modem status change", i);
 					mos7840_port->MsrLsr = 0;
 					wreg = MODEM_STATUS_REGISTER;
 					break;
@@ -689,7 +689,7 @@ static void mos7840_bulk_in_callback(struct urb *urb)
 
 	mos7840_port = urb->context;
 	if (!mos7840_port) {
-		dbg("%s", "NULL mos7840_port pointer \n");
+		dbg("%s", "NULL mos7840_port pointer");
 		mos7840_port->read_urb_busy = false;
 		return;
 	}
@@ -702,41 +702,41 @@ static void mos7840_bulk_in_callback(struct urb *urb)
 
 	port = (struct usb_serial_port *)mos7840_port->port;
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		mos7840_port->read_urb_busy = false;
 		return;
 	}
 
 	serial = mos7840_get_usb_serial(port, __func__);
 	if (!serial) {
-		dbg("%s\n", "Bad serial pointer ");
+		dbg("%s", "Bad serial pointer");
 		mos7840_port->read_urb_busy = false;
 		return;
 	}
 
-	dbg("%s\n", "Entering... \n");
+	dbg("%s", "Entering... ");
 
 	data = urb->transfer_buffer;
 
-	dbg("%s", "Entering ........... \n");
+	dbg("%s", "Entering ...........");
 
 	if (urb->actual_length) {
 		tty = tty_port_tty_get(&mos7840_port->port->port);
 		if (tty) {
 			tty_buffer_request_room(tty, urb->actual_length);
 			tty_insert_flip_string(tty, data, urb->actual_length);
-			dbg(" %s \n", data);
+			dbg(" %s ", data);
 			tty_flip_buffer_push(tty);
 			tty_kref_put(tty);
 		}
 		mos7840_port->icount.rx += urb->actual_length;
 		smp_wmb();
-		dbg("mos7840_port->icount.rx is %d:\n",
+		dbg("mos7840_port->icount.rx is %d:",
 		    mos7840_port->icount.rx);
 	}
 
 	if (!mos7840_port->read_urb) {
-		dbg("%s", "URB KILLED !!!\n");
+		dbg("%s", "URB KILLED !!!");
 		mos7840_port->read_urb_busy = false;
 		return;
 	}
@@ -777,16 +777,16 @@ static void mos7840_bulk_out_data_callback(struct urb *urb)
 	spin_unlock(&mos7840_port->pool_lock);
 
 	if (status) {
-		dbg("nonzero write bulk status received:%d\n", status);
+		dbg("nonzero write bulk status received:%d", status);
 		return;
 	}
 
 	if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		return;
 	}
 
-	dbg("%s \n", "Entering .........");
+	dbg("%s", "Entering .........");
 
 	tty = tty_port_tty_get(&mos7840_port->port->port);
 	if (tty && mos7840_port->open)
@@ -830,15 +830,17 @@ static int mos7840_open(struct tty_struct *tty,
 	struct moschip_port *mos7840_port;
 	struct moschip_port *port0;
 
+	dbg ("%s enter", __func__);
+
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		return -ENODEV;
 	}
 
 	serial = port->serial;
 
 	if (mos7840_serial_paranoia_check(serial, __func__)) {
-		dbg("%s", "Serial Paranoia failed \n");
+		dbg("%s", "Serial Paranoia failed");
 		return -ENODEV;
 	}
 
@@ -891,20 +893,20 @@ static int mos7840_open(struct tty_struct *tty,
 	Data = 0x0;
 	status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
 	if (status < 0) {
-		dbg("Reading Spreg failed\n");
+		dbg("Reading Spreg failed");
 		return -1;
 	}
 	Data |= 0x80;
 	status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
 	if (status < 0) {
-		dbg("writing Spreg failed\n");
+		dbg("writing Spreg failed");
 		return -1;
 	}
 
 	Data &= ~0x80;
 	status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
 	if (status < 0) {
-		dbg("writing Spreg failed\n");
+		dbg("writing Spreg failed");
 		return -1;
 	}
 	/* End of block to be checked */
@@ -913,7 +915,7 @@ static int mos7840_open(struct tty_struct *tty,
 	status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
 									&Data);
 	if (status < 0) {
-		dbg("Reading Controlreg failed\n");
+		dbg("Reading Controlreg failed");
 		return -1;
 	}
 	Data |= 0x08;		/* Driver done bit */
@@ -921,7 +923,7 @@ static int mos7840_open(struct tty_struct *tty,
 	status = mos7840_set_reg_sync(port,
 				mos7840_port->ControlRegOffset, Data);
 	if (status < 0) {
-		dbg("writing Controlreg failed\n");
+		dbg("writing Controlreg failed");
 		return -1;
 	}
 	/* do register settings here */
@@ -932,21 +934,21 @@ static int mos7840_open(struct tty_struct *tty,
 	Data = 0x00;
 	status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
 	if (status < 0) {
-		dbg("disableing interrupts failed\n");
+		dbg("disabling interrupts failed");
 		return -1;
 	}
 	/* Set FIFO_CONTROL_REGISTER to the default value */
 	Data = 0x00;
 	status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
 	if (status < 0) {
-		dbg("Writing FIFO_CONTROL_REGISTER  failed\n");
+		dbg("Writing FIFO_CONTROL_REGISTER  failed");
 		return -1;
 	}
 
 	Data = 0xcf;
 	status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
 	if (status < 0) {
-		dbg("Writing FIFO_CONTROL_REGISTER  failed\n");
+		dbg("Writing FIFO_CONTROL_REGISTER  failed");
 		return -1;
 	}
 
@@ -1043,12 +1045,12 @@ static int mos7840_open(struct tty_struct *tty,
 	 * (can't set it up in mos7840_startup as the  *
 	 * structures were not set up at that time.)   */
 
-	dbg("port number is %d \n", port->number);
-	dbg("serial number is %d \n", port->serial->minor);
-	dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
-	dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
-	dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
-	dbg("port's number in the device is %d\n", mos7840_port->port_num);
+	dbg("port number is %d", port->number);
+	dbg("serial number is %d", port->serial->minor);
+	dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
+	dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
+	dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
+	dbg("port's number in the device is %d", mos7840_port->port_num);
 	mos7840_port->read_urb = port->read_urb;
 
 	/* set up our bulk in urb */
@@ -1061,7 +1063,7 @@ static int mos7840_open(struct tty_struct *tty,
 			  mos7840_port->read_urb->transfer_buffer_length,
 			  mos7840_bulk_in_callback, mos7840_port);
 
-	dbg("mos7840_open: bulkin endpoint is %d\n",
+	dbg("mos7840_open: bulkin endpoint is %d",
 	    port->bulk_in_endpointAddress);
 	mos7840_port->read_urb_busy = true;
 	response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
@@ -1087,9 +1089,11 @@ static int mos7840_open(struct tty_struct *tty,
 	mos7840_port->icount.tx = 0;
 	mos7840_port->icount.rx = 0;
 
-	dbg("\n\nusb_serial serial:%p       mos7840_port:%p\n      usb_serial_port port:%p\n\n",
+	dbg("usb_serial serial:%p       mos7840_port:%p\n      usb_serial_port port:%p",
 				serial, mos7840_port, port);
 
+	dbg ("%s leave", __func__);
+
 	return 0;
 
 }
@@ -1112,16 +1116,16 @@ static int mos7840_chars_in_buffer(struct tty_struct *tty)
 	unsigned long flags;
 	struct moschip_port *mos7840_port;
 
-	dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
+	dbg("%s", " mos7840_chars_in_buffer:entering ...........");
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return 0;
 	}
 
 	mos7840_port = mos7840_get_port_private(port);
 	if (mos7840_port == NULL) {
-		dbg("%s \n", "mos7840_break:leaving ...........");
+		dbg("%s", "mos7840_break:leaving ...........");
 		return 0;
 	}
 
@@ -1148,16 +1152,16 @@ static void mos7840_close(struct usb_serial_port *port)
 	int j;
 	__u16 Data;
 
-	dbg("%s\n", "mos7840_close:entering...");
+	dbg("%s", "mos7840_close:entering...");
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		return;
 	}
 
 	serial = mos7840_get_usb_serial(port, __func__);
 	if (!serial) {
-		dbg("%s", "Serial Paranoia failed \n");
+		dbg("%s", "Serial Paranoia failed");
 		return;
 	}
 
@@ -1185,27 +1189,27 @@ static void mos7840_close(struct usb_serial_port *port)
 	 * and interrupt read if they exists                  */
 	if (serial->dev) {
 		if (mos7840_port->write_urb) {
-			dbg("%s", "Shutdown bulk write\n");
+			dbg("%s", "Shutdown bulk write");
 			usb_kill_urb(mos7840_port->write_urb);
 		}
 		if (mos7840_port->read_urb) {
-			dbg("%s", "Shutdown bulk read\n");
+			dbg("%s", "Shutdown bulk read");
 			usb_kill_urb(mos7840_port->read_urb);
 			mos7840_port->read_urb_busy = false;
 		}
 		if ((&mos7840_port->control_urb)) {
-			dbg("%s", "Shutdown control read\n");
+			dbg("%s", "Shutdown control read");
 			/*/      usb_kill_urb (mos7840_port->control_urb); */
 		}
 	}
 /*      if(mos7840_port->ctrl_buf != NULL) */
 /*              kfree(mos7840_port->ctrl_buf); */
 	port0->open_ports--;
-	dbg("mos7840_num_open_ports in close%d:in port%d\n",
+	dbg("mos7840_num_open_ports in close%d:in port%d",
 	    port0->open_ports, port->number);
 	if (port0->open_ports == 0) {
 		if (serial->port[0]->interrupt_in_urb) {
-			dbg("%s", "Shutdown interrupt_in_urb\n");
+			dbg("%s", "Shutdown interrupt_in_urb");
 			usb_kill_urb(serial->port[0]->interrupt_in_urb);
 		}
 	}
@@ -1225,7 +1229,7 @@ static void mos7840_close(struct usb_serial_port *port)
 
 	mos7840_port->open = 0;
 
-	dbg("%s \n", "Leaving ............");
+	dbg("%s", "Leaving ............");
 }
 
 /************************************************************************
@@ -1280,17 +1284,17 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
 	struct usb_serial *serial;
 	struct moschip_port *mos7840_port;
 
-	dbg("%s \n", "Entering ...........");
-	dbg("mos7840_break: Start\n");
+	dbg("%s", "Entering ...........");
+	dbg("mos7840_break: Start");
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		return;
 	}
 
 	serial = mos7840_get_usb_serial(port, __func__);
 	if (!serial) {
-		dbg("%s", "Serial Paranoia failed \n");
+		dbg("%s", "Serial Paranoia failed");
 		return;
 	}
 
@@ -1310,7 +1314,7 @@ static void mos7840_break(struct tty_struct *tty, int break_state)
 
 	/* FIXME: no locking on shadowLCR anywhere in driver */
 	mos7840_port->shadowLCR = data;
-	dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
+	dbg("mcs7840_break mos7840_port->shadowLCR is %x",
 	    mos7840_port->shadowLCR);
 	mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
 			     mos7840_port->shadowLCR);
@@ -1334,17 +1338,17 @@ static int mos7840_write_room(struct tty_struct *tty)
 	unsigned long flags;
 	struct moschip_port *mos7840_port;
 
-	dbg("%s \n", " mos7840_write_room:entering ...........");
+	dbg("%s", " mos7840_write_room:entering ...........");
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
-		dbg("%s \n", " mos7840_write_room:leaving ...........");
+		dbg("%s", "Invalid port");
+		dbg("%s", " mos7840_write_room:leaving ...........");
 		return -1;
 	}
 
 	mos7840_port = mos7840_get_port_private(port);
 	if (mos7840_port == NULL) {
-		dbg("%s \n", "mos7840_break:leaving ...........");
+		dbg("%s", "mos7840_break:leaving ...........");
 		return -1;
 	}
 
@@ -1384,16 +1388,16 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 	/* __u16 Data; */
 	const unsigned char *current_position = data;
 	unsigned char *data1;
-	dbg("%s \n", "entering ...........");
-	/* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
+	dbg("%s", "entering ...........");
+	/* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
 					mos7840_port->shadowLCR); */
 
 #ifdef NOTMOS7840
 	Data = 0x00;
 	status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
 	mos7840_port->shadowLCR = Data;
-	dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
-	dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
+	dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
+	dbg("mos7840_write: mos7840_port->shadowLCR is %x",
 	    mos7840_port->shadowLCR);
 
 	/* Data = 0x03; */
@@ -1407,32 +1411,32 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 	/* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
 	Data = 0x00;
 	status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
-	dbg("mos7840_write:DLL value is %x\n", Data);
+	dbg("mos7840_write:DLL value is %x", Data);
 
 	Data = 0x0;
 	status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
-	dbg("mos7840_write:DLM value is %x\n", Data);
+	dbg("mos7840_write:DLM value is %x", Data);
 
 	Data = Data & ~SERIAL_LCR_DLAB;
-	dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
+	dbg("mos7840_write: mos7840_port->shadowLCR is %x",
 	    mos7840_port->shadowLCR);
 	status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
 #endif
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Port Paranoia failed \n");
+		dbg("%s", "Port Paranoia failed");
 		return -1;
 	}
 
 	serial = port->serial;
 	if (mos7840_serial_paranoia_check(serial, __func__)) {
-		dbg("%s", "Serial Paranoia failed \n");
+		dbg("%s", "Serial Paranoia failed");
 		return -1;
 	}
 
 	mos7840_port = mos7840_get_port_private(port);
 	if (mos7840_port == NULL) {
-		dbg("%s", "mos7840_port is NULL\n");
+		dbg("%s", "mos7840_port is NULL");
 		return -1;
 	}
 
@@ -1444,7 +1448,7 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 		if (!mos7840_port->busy[i]) {
 			mos7840_port->busy[i] = 1;
 			urb = mos7840_port->write_urb_pool[i];
-			dbg("\nURB:%d", i);
+			dbg("URB:%d", i);
 			break;
 		}
 	}
@@ -1479,7 +1483,7 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 			  mos7840_bulk_out_data_callback, mos7840_port);
 
 	data1 = urb->transfer_buffer;
-	dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
+	dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
 
 	/* send it down the pipe */
 	status = usb_submit_urb(urb, GFP_ATOMIC);
@@ -1494,7 +1498,7 @@ static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
 	bytes_sent = transfer_size;
 	mos7840_port->icount.tx += transfer_size;
 	smp_wmb();
-	dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
+	dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
 exit:
 	return bytes_sent;
 
@@ -1513,11 +1517,11 @@ static void mos7840_throttle(struct tty_struct *tty)
 	int status;
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return;
 	}
 
-	dbg("- port %d\n", port->number);
+	dbg("- port %d", port->number);
 
 	mos7840_port = mos7840_get_port_private(port);
 
@@ -1525,11 +1529,11 @@ static void mos7840_throttle(struct tty_struct *tty)
 		return;
 
 	if (!mos7840_port->open) {
-		dbg("%s\n", "port not opened");
+		dbg("%s", "port not opened");
 		return;
 	}
 
-	dbg("%s", "Entering .......... \n");
+	dbg("%s", "Entering ..........");
 
 	/* if we are implementing XON/XOFF, send the stop character */
 	if (I_IXOFF(tty)) {
@@ -1563,7 +1567,7 @@ static void mos7840_unthrottle(struct tty_struct *tty)
 	struct moschip_port *mos7840_port = mos7840_get_port_private(port);
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return;
 	}
 
@@ -1575,7 +1579,7 @@ static void mos7840_unthrottle(struct tty_struct *tty)
 		return;
 	}
 
-	dbg("%s", "Entering .......... \n");
+	dbg("%s", "Entering ..........");
 
 	/* if we are implementing XON/XOFF, send the start character */
 	if (I_IXOFF(tty)) {
@@ -1660,7 +1664,7 @@ static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
 
 	status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
 	if (status < 0) {
-		dbg("setting MODEM_CONTROL_REGISTER Failed\n");
+		dbg("setting MODEM_CONTROL_REGISTER Failed");
 		return status;
 	}
 
@@ -1729,11 +1733,11 @@ static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
 			custom++;
 		*divisor = custom;
 
-		dbg(" Baud %d = %d\n", baudrate, custom);
+		dbg(" Baud %d = %d", baudrate, custom);
 		return 0;
 	}
 
-	dbg("%s\n", " Baud calculation Failed...");
+	dbg("%s", " Baud calculation Failed...");
 	return -1;
 #endif
 }
@@ -1759,16 +1763,16 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 
 	port = (struct usb_serial_port *)mos7840_port->port;
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return -1;
 	}
 
 	if (mos7840_serial_paranoia_check(port->serial, __func__)) {
-		dbg("%s", "Invalid Serial \n");
+		dbg("%s", "Invalid Serial");
 		return -1;
 	}
 
-	dbg("%s", "Entering .......... \n");
+	dbg("%s", "Entering ..........");
 
 	number = mos7840_port->port->number - mos7840_port->port->serial->minor;
 
@@ -1784,7 +1788,7 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 		status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
 									Data);
 		if (status < 0) {
-			dbg("Writing spreg failed in set_serial_baud\n");
+			dbg("Writing spreg failed in set_serial_baud");
 			return -1;
 		}
 #endif
@@ -1797,7 +1801,7 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 		status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
 									Data);
 		if (status < 0) {
-			dbg("Writing spreg failed in set_serial_baud\n");
+			dbg("Writing spreg failed in set_serial_baud");
 			return -1;
 		}
 #endif
@@ -1812,14 +1816,14 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 		status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
 								 &Data);
 		if (status < 0) {
-			dbg("reading spreg failed in set_serial_baud\n");
+			dbg("reading spreg failed in set_serial_baud");
 			return -1;
 		}
 		Data = (Data & 0x8f) | clk_sel_val;
 		status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
 								Data);
 		if (status < 0) {
-			dbg("Writing spreg failed in set_serial_baud\n");
+			dbg("Writing spreg failed in set_serial_baud");
 			return -1;
 		}
 		/* Calculate the Divisor */
@@ -1835,11 +1839,11 @@ static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
 
 		/* Write the divisor */
 		Data = (unsigned char)(divisor & 0xff);
-		dbg("set_serial_baud Value to write DLL is %x\n", Data);
+		dbg("set_serial_baud Value to write DLL is %x", Data);
 		mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
 
 		Data = (unsigned char)((divisor & 0xff00) >> 8);
-		dbg("set_serial_baud Value to write DLM is %x\n", Data);
+		dbg("set_serial_baud Value to write DLM is %x", Data);
 		mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
 
 		/* Disable access to divisor latch */
@@ -1877,12 +1881,12 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
 	port = (struct usb_serial_port *)mos7840_port->port;
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return;
 	}
 
 	if (mos7840_serial_paranoia_check(port->serial, __func__)) {
-		dbg("%s", "Invalid Serial \n");
+		dbg("%s", "Invalid Serial");
 		return;
 	}
 
@@ -1895,7 +1899,7 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
 		return;
 	}
 
-	dbg("%s", "Entering .......... \n");
+	dbg("%s", "Entering ..........");
 
 	lData = LCR_BITS_8;
 	lStop = LCR_STOP_1;
@@ -1955,7 +1959,7 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
 	    ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
 	mos7840_port->shadowLCR |= (lData | lParity | lStop);
 
-	dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
+	dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
 	    mos7840_port->shadowLCR);
 	/* Disable Interrupts */
 	Data = 0x00;
@@ -1997,7 +2001,7 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
 
 	if (!baud) {
 		/* pick a default, any default... */
-		dbg("%s\n", "Picked default baud...");
+		dbg("%s", "Picked default baud...");
 		baud = 9600;
 	}
 
@@ -2020,7 +2024,7 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
 	}
 	wake_up(&mos7840_port->delta_msr_wait);
 	mos7840_port->delta_msr_cond = 1;
-	dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
+	dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
 	    mos7840_port->shadowLCR);
 
 	return;
@@ -2040,16 +2044,16 @@ static void mos7840_set_termios(struct tty_struct *tty,
 	unsigned int cflag;
 	struct usb_serial *serial;
 	struct moschip_port *mos7840_port;
-	dbg("mos7840_set_termios: START\n");
+	dbg("mos7840_set_termios: START");
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return;
 	}
 
 	serial = port->serial;
 
 	if (mos7840_serial_paranoia_check(serial, __func__)) {
-		dbg("%s", "Invalid Serial \n");
+		dbg("%s", "Invalid Serial");
 		return;
 	}
 
@@ -2063,7 +2067,7 @@ static void mos7840_set_termios(struct tty_struct *tty,
 		return;
 	}
 
-	dbg("%s\n", "setting termios - ");
+	dbg("%s", "setting termios - ");
 
 	cflag = tty->termios->c_cflag;
 
@@ -2078,7 +2082,7 @@ static void mos7840_set_termios(struct tty_struct *tty,
 	mos7840_change_port_settings(tty, mos7840_port, old_termios);
 
 	if (!mos7840_port->read_urb) {
-		dbg("%s", "URB KILLED !!!!!\n");
+		dbg("%s", "URB KILLED !!!!!");
 		return;
 	}
 
@@ -2144,7 +2148,7 @@ static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
 
 	port = (struct usb_serial_port *)mos7840_port->port;
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return -1;
 	}
 
@@ -2189,7 +2193,7 @@ static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
 	status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
 	unlock_kernel();
 	if (status < 0) {
-		dbg("setting MODEM_CONTROL_REGISTER Failed\n");
+		dbg("setting MODEM_CONTROL_REGISTER Failed");
 		return -1;
 	}
 
@@ -2274,7 +2278,7 @@ static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
 	int mosret = 0;
 
 	if (mos7840_port_paranoia_check(port, __func__)) {
-		dbg("%s", "Invalid port \n");
+		dbg("%s", "Invalid port");
 		return -1;
 	}
 
@@ -2374,9 +2378,8 @@ static int mos7840_calc_num_ports(struct usb_serial *serial)
 {
 	int mos7840_num_ports = 0;
 
-	dbg("numberofendpoints: %d \n",
-	    (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
-	dbg("numberofendpoints: %d \n",
+	dbg("numberofendpoints: cur %d, alt %d",
+	    (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
 	    (int)serial->interface->altsetting->desc.bNumEndpoints);
 	if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
 		mos7840_num_ports = serial->num_ports = 2;
@@ -2385,7 +2388,7 @@ static int mos7840_calc_num_ports(struct usb_serial *serial)
 		serial->num_bulk_out = 4;
 		mos7840_num_ports = serial->num_ports = 4;
 	}
-
+	dbg ("mos7840_num_ports = %d", mos7840_num_ports);
 	return mos7840_num_ports;
 }
 
@@ -2400,22 +2403,24 @@ static int mos7840_startup(struct usb_serial *serial)
 	int i, status;
 
 	__u16 Data;
-	dbg("%s \n", " mos7840_startup :entering..........");
+	dbg("%s", "mos7840_startup :Entering..........");
 
 	if (!serial) {
-		dbg("%s\n", "Invalid Handler");
+		dbg("%s", "Invalid Handler");
 		return -1;
 	}
 
 	dev = serial->dev;
 
-	dbg("%s\n", "Entering...");
+	dbg("%s", "Entering...");
+	dbg ("mos7840_startup: serial = %p", serial);
 
 	/* we set up the pointers to the endpoints in the mos7840_open *
 	 * function, as the structures aren't created yet.             */
 
 	/* set up port private structures */
 	for (i = 0; i < serial->num_ports; ++i) {
+		dbg ("mos7840_startup: configuring port %d............", i);
 		mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
 		if (mos7840_port == NULL) {
 			dev_err(&dev->dev, "%s - Out of memory\n", __func__);
@@ -2473,10 +2478,10 @@ static int mos7840_startup(struct usb_serial *serial)
 		status = mos7840_get_reg_sync(serial->port[i],
 				 mos7840_port->ControlRegOffset, &Data);
 		if (status < 0) {
-			dbg("Reading ControlReg failed status-0x%x\n", status);
+			dbg("Reading ControlReg failed status-0x%x", status);
 			break;
 		} else
-			dbg("ControlReg Reading success val is %x, status%d\n",
+			dbg("ControlReg Reading success val is %x, status%d",
 			    Data, status);
 		Data |= 0x08;	/* setting driver done bit */
 		Data |= 0x04;	/* sp1_bit to have cts change reflect in
@@ -2486,10 +2491,10 @@ static int mos7840_startup(struct usb_serial *serial)
 		status = mos7840_set_reg_sync(serial->port[i],
 					 mos7840_port->ControlRegOffset, Data);
 		if (status < 0) {
-			dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
+			dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
 			break;
 		} else
-			dbg("ControlReg Writing success(rx_disable) status%d\n",
+			dbg("ControlReg Writing success(rx_disable) status%d",
 			    status);
 
 		/* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
@@ -2498,48 +2503,48 @@ static int mos7840_startup(struct usb_serial *serial)
 		status = mos7840_set_reg_sync(serial->port[i],
 			 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
 		if (status < 0) {
-			dbg("Writing DCR0 failed status-0x%x\n", status);
+			dbg("Writing DCR0 failed status-0x%x", status);
 			break;
 		} else
-			dbg("DCR0 Writing success status%d\n", status);
+			dbg("DCR0 Writing success status%d", status);
 
 		Data = 0x05;
 		status = mos7840_set_reg_sync(serial->port[i],
 			 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
 		if (status < 0) {
-			dbg("Writing DCR1 failed status-0x%x\n", status);
+			dbg("Writing DCR1 failed status-0x%x", status);
 			break;
 		} else
-			dbg("DCR1 Writing success status%d\n", status);
+			dbg("DCR1 Writing success status%d", status);
 
 		Data = 0x24;
 		status = mos7840_set_reg_sync(serial->port[i],
 			 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
 		if (status < 0) {
-			dbg("Writing DCR2 failed status-0x%x\n", status);
+			dbg("Writing DCR2 failed status-0x%x", status);
 			break;
 		} else
-			dbg("DCR2 Writing success status%d\n", status);
+			dbg("DCR2 Writing success status%d", status);
 
 		/* write values in clkstart0x0 and clkmulti 0x20 */
 		Data = 0x0;
 		status = mos7840_set_reg_sync(serial->port[i],
 					 CLK_START_VALUE_REGISTER, Data);
 		if (status < 0) {
-			dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
+			dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
 			break;
 		} else
-			dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
+			dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
 
 		Data = 0x20;
 		status = mos7840_set_reg_sync(serial->port[i],
 					CLK_MULTI_REGISTER, Data);
 		if (status < 0) {
-			dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
+			dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
 			    status);
 			goto error;
 		} else
-			dbg("CLK_MULTI_REGISTER Writing success status%d\n",
+			dbg("CLK_MULTI_REGISTER Writing success status%d",
 			    status);
 
 		/* write value 0x0 to scratchpad register */
@@ -2547,11 +2552,11 @@ static int mos7840_startup(struct usb_serial *serial)
 		status = mos7840_set_uart_reg(serial->port[i],
 						SCRATCH_PAD_REGISTER, Data);
 		if (status < 0) {
-			dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
+			dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
 			    status);
 			break;
 		} else
-			dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
+			dbg("SCRATCH_PAD_REGISTER Writing success status%d",
 			    status);
 
 		/* Zero Length flag register */
@@ -2562,30 +2567,30 @@ static int mos7840_startup(struct usb_serial *serial)
 			status = mos7840_set_reg_sync(serial->port[i],
 				      (__u16) (ZLP_REG1 +
 				      ((__u16)mos7840_port->port_num)), Data);
-			dbg("ZLIP offset%x\n",
+			dbg("ZLIP offset %x",
 			    (__u16) (ZLP_REG1 +
 					((__u16) mos7840_port->port_num)));
 			if (status < 0) {
-				dbg("Writing ZLP_REG%d failed status-0x%x\n",
+				dbg("Writing ZLP_REG%d failed status-0x%x",
 				    i + 2, status);
 				break;
 			} else
-				dbg("ZLP_REG%d Writing success status%d\n",
+				dbg("ZLP_REG%d Writing success status%d",
 				    i + 2, status);
 		} else {
 			Data = 0xff;
 			status = mos7840_set_reg_sync(serial->port[i],
 			      (__u16) (ZLP_REG1 +
 			      ((__u16)mos7840_port->port_num) - 0x1), Data);
-			dbg("ZLIP offset%x\n",
+			dbg("ZLIP offset %x",
 			    (__u16) (ZLP_REG1 +
 				     ((__u16) mos7840_port->port_num) - 0x1));
 			if (status < 0) {
-				dbg("Writing ZLP_REG%d failed status-0x%x\n",
+				dbg("Writing ZLP_REG%d failed status-0x%x",
 				    i + 1, status);
 				break;
 			} else
-				dbg("ZLP_REG%d Writing success status%d\n",
+				dbg("ZLP_REG%d Writing success status%d",
 				    i + 1, status);
 
 		}
@@ -2599,15 +2604,16 @@ static int mos7840_startup(struct usb_serial *serial)
 			goto error;
 		}
 	}
+	dbg ("mos7840_startup: all ports configured...........");
 
 	/* Zero Length flag enable */
 	Data = 0x0f;
 	status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
 	if (status < 0) {
-		dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
+		dbg("Writing ZLP_REG5 failed status-0x%x", status);
 		goto error;
 	} else
-		dbg("ZLP_REG5 Writing success status%d\n", status);
+		dbg("ZLP_REG5 Writing success status%d", status);
 
 	/* setting configuration feature to one */
 	usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
@@ -2636,10 +2642,10 @@ static void mos7840_shutdown(struct usb_serial *serial)
 	int i;
 	unsigned long flags;
 	struct moschip_port *mos7840_port;
-	dbg("%s \n", " shutdown :entering..........");
+	dbg("%s", " shutdown :entering..........");
 
 	if (!serial) {
-		dbg("%s", "Invalid Handler \n");
+		dbg("%s", "Invalid Handler");
 		return;
 	}
 
@@ -2663,7 +2669,7 @@ static void mos7840_shutdown(struct usb_serial *serial)
 		mos7840_set_port_private(serial->port[i], NULL);
 	}
 
-	dbg("%s\n", "Thank u :: ");
+	dbg("%s", "Thank u :: ");
 
 }
 
@@ -2714,7 +2720,7 @@ static int __init moschip7840_init(void)
 {
 	int retval;
 
-	dbg("%s \n", " mos7840_init :entering..........");
+	dbg("%s", " mos7840_init :entering..........");
 
 	/* Register with the usb serial */
 	retval = usb_serial_register(&moschip7840_4port_device);
@@ -2722,14 +2728,14 @@ static int __init moschip7840_init(void)
 	if (retval)
 		goto failed_port_device_register;
 
-	dbg("%s\n", "Entring...");
+	dbg("%s", "Entering...");
 	printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 	       DRIVER_DESC "\n");
 
 	/* Register with the usb */
 	retval = usb_register(&io_driver);
 	if (retval == 0) {
-		dbg("%s\n", "Leaving...");
+		dbg("%s", "Leaving...");
 		return 0;
 	}
 	usb_serial_deregister(&moschip7840_4port_device);
@@ -2744,13 +2750,13 @@ failed_port_device_register:
 static void __exit moschip7840_exit(void)
 {
 
-	dbg("%s \n", " mos7840_exit :entering..........");
+	dbg("%s", " mos7840_exit :entering..........");
 
 	usb_deregister(&io_driver);
 
 	usb_serial_deregister(&moschip7840_4port_device);
 
-	dbg("%s\n", "Entring...");
+	dbg("%s", "Entering...");
 }
 
 module_init(moschip7840_init);
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index a16d69fadba1..3f95719524aa 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -43,6 +43,8 @@
 #include <linux/usb/serial.h>
 
 /* Function prototypes */
+static int  option_probe(struct usb_serial *serial,
+			const struct usb_device_id *id);
 static int  option_open(struct tty_struct *tty, struct usb_serial_port *port,
 							struct file *filp);
 static void option_close(struct usb_serial_port *port);
@@ -202,9 +204,9 @@ static int  option_resume(struct usb_serial *serial);
 #define NOVATELWIRELESS_PRODUCT_MC727		0x4100
 #define NOVATELWIRELESS_PRODUCT_MC950D		0x4400
 #define NOVATELWIRELESS_PRODUCT_U727		0x5010
+#define NOVATELWIRELESS_PRODUCT_MC760		0x6000
 
 /* FUTURE NOVATEL PRODUCTS */
-#define NOVATELWIRELESS_PRODUCT_EVDO_FULLSPEED	0X6000
 #define NOVATELWIRELESS_PRODUCT_EVDO_HIGHSPEED	0X6001
 #define NOVATELWIRELESS_PRODUCT_HSPA_FULLSPEED	0X7000
 #define NOVATELWIRELESS_PRODUCT_HSPA_HIGHSPEED	0X7001
@@ -422,7 +424,7 @@ static struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_MC950D) }, /* Novatel MC930D/MC950D */
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_MC727) }, /* Novatel MC727/U727/USB727 */
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_U727) }, /* Novatel MC727/U727/USB727 */
-	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EVDO_FULLSPEED) }, /* Novatel EVDO product */
+	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_MC760) }, /* Novatel MC760/U760/USB760 */
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_HSPA_FULLSPEED) }, /* Novatel HSPA product */
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_EVDO_EMBEDDED_FULLSPEED) }, /* Novatel EVDO Embedded product */
 	{ USB_DEVICE(NOVATELWIRELESS_VENDOR_ID, NOVATELWIRELESS_PRODUCT_HSPA_EMBEDDED_FULLSPEED) }, /* Novatel HSPA Embedded product */
@@ -550,6 +552,7 @@ static struct usb_serial_driver option_1port_device = {
 	.usb_driver        = &option_driver,
 	.id_table          = option_ids,
 	.num_ports         = 1,
+	.probe             = option_probe,
 	.open              = option_open,
 	.close             = option_close,
 	.dtr_rts	   = option_dtr_rts,
@@ -626,6 +629,18 @@ static void __exit option_exit(void)
 module_init(option_init);
 module_exit(option_exit);
 
+static int option_probe(struct usb_serial *serial,
+			const struct usb_device_id *id)
+{
+	/* D-Link DWM 652 still exposes CD-Rom emulation interface in modem mode */
+	if (serial->dev->descriptor.idVendor == DLINK_VENDOR_ID &&
+		serial->dev->descriptor.idProduct == DLINK_PRODUCT_DWM_652 &&
+		serial->interface->cur_altsetting->desc.bInterfaceClass == 0x8)
+		return -ENODEV;
+
+	return 0;
+}
+
 static void option_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios)
 {
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 1319b8968d82..57ae3d7274b1 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -1,7 +1,10 @@
 /*
   USB Driver for Sierra Wireless
 
-  Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>
+  Copyright (C) 2006, 2007, 2008  Kevin Lloyd <klloyd@sierrawireless.com>,
+
+  Copyright (C) 2008, 2009  Elina Pasheva, Matthew Safar, Rory Filer
+			<linux@sierrawireless.com>
 
   IMPORTANT DISCLAIMER: This driver is not commercially supported by
   Sierra Wireless. Use at your own risk.
@@ -14,8 +17,8 @@
   Whom based his on the Keyspan driver by Hugh Blemings <hugh@blemings.org>
 */
 
-#define DRIVER_VERSION "v.1.3.3"
-#define DRIVER_AUTHOR "Kevin Lloyd <klloyd@sierrawireless.com>"
+#define DRIVER_VERSION "v.1.3.7"
+#define DRIVER_AUTHOR "Kevin Lloyd, Elina Pasheva, Matthew Safar, Rory Filer"
 #define DRIVER_DESC "USB Driver for Sierra Wireless USB modems"
 
 #include <linux/kernel.h>
@@ -32,17 +35,22 @@
 #define SWIMS_USB_REQUEST_SetNmea	0x07
 
 /* per port private data */
-#define N_IN_URB	4
-#define N_OUT_URB	4
+#define N_IN_URB	8
+#define N_OUT_URB	64
 #define IN_BUFLEN	4096
 
+#define MAX_TRANSFER		(PAGE_SIZE - 512)
+/* MAX_TRANSFER is chosen so that the VM is not stressed by
+   allocations > PAGE_SIZE and the number of packets in a page
+   is an integer 512 is the largest possible packet on EHCI */
+
 static int debug;
 static int nmea;
 
 static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
 {
 	int result;
-	dev_dbg(&udev->dev, "%s", __func__);
+	dev_dbg(&udev->dev, "%s\n", __func__);
 	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 			SWIMS_USB_REQUEST_SetPower,	/* __u8 request      */
 			USB_TYPE_VENDOR,		/* __u8 request type */
@@ -57,7 +65,7 @@ static int sierra_set_power_state(struct usb_device *udev, __u16 swiState)
 static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
 {
 	int result;
-	dev_dbg(&udev->dev, "%s", __func__);
+	dev_dbg(&udev->dev, "%s\n", __func__);
 	result = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
 			SWIMS_USB_REQUEST_SetNmea,	/* __u8 request      */
 			USB_TYPE_VENDOR,		/* __u8 request type */
@@ -71,18 +79,22 @@ static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
 
 static int sierra_calc_num_ports(struct usb_serial *serial)
 {
-	int result;
-	int *num_ports = usb_get_serial_data(serial);
-	dev_dbg(&serial->dev->dev, "%s", __func__);
+	int num_ports = 0;
+	u8 ifnum, numendpoints;
 
-	result = *num_ports;
+	dev_dbg(&serial->dev->dev, "%s\n", __func__);
 
-	if (result) {
-		kfree(num_ports);
-		usb_set_serial_data(serial, NULL);
-	}
+	ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
+	numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 
-	return result;
+	/* Dummy interface present on some SKUs should be ignored */
+	if (ifnum == 0x99)
+		num_ports = 0;
+	else if (numendpoints <= 3)
+		num_ports = 1;
+	else
+		num_ports = (numendpoints-1)/2;
+	return num_ports;
 }
 
 static int sierra_calc_interface(struct usb_serial *serial)
@@ -90,7 +102,7 @@ static int sierra_calc_interface(struct usb_serial *serial)
 	int interface;
 	struct usb_interface *p_interface;
 	struct usb_host_interface *p_host_interface;
-	dev_dbg(&serial->dev->dev, "%s", __func__);
+	dev_dbg(&serial->dev->dev, "%s\n", __func__);
 
 	/* Get the interface structure pointer from the serial struct */
 	p_interface = serial->interface;
@@ -111,23 +123,12 @@ static int sierra_probe(struct usb_serial *serial,
 {
 	int result = 0;
 	struct usb_device *udev;
-	int *num_ports;
 	u8 ifnum;
-	u8 numendpoints;
-
-	dev_dbg(&serial->dev->dev, "%s", __func__);
-
-	num_ports = kmalloc(sizeof(*num_ports), GFP_KERNEL);
-	if (!num_ports)
-		return -ENOMEM;
 
-	ifnum = serial->interface->cur_altsetting->desc.bInterfaceNumber;
-	numendpoints = serial->interface->cur_altsetting->desc.bNumEndpoints;
 	udev = serial->dev;
+	dev_dbg(&udev->dev, "%s\n", __func__);
 
-	/* Figure out the interface number from the serial structure */
 	ifnum = sierra_calc_interface(serial);
-
 	/*
 	 * If this interface supports more than 1 alternate
 	 * select the 2nd one
@@ -139,20 +140,6 @@ static int sierra_probe(struct usb_serial *serial,
 		usb_set_interface(udev, ifnum, 1);
 	}
 
-	/* Dummy interface present on some SKUs should be ignored */
-	if (ifnum == 0x99)
-		*num_ports = 0;
-	else if (numendpoints <= 3)
-		*num_ports = 1;
-	else
-		*num_ports = (numendpoints-1)/2;
-
-	/*
-	 * save off our num_ports info so that we can use it in the
-	 * calc_num_ports callback
-	 */
-	usb_set_serial_data(serial, (void *)num_ports);
-
 	return result;
 }
 
@@ -247,7 +234,7 @@ static int sierra_send_setup(struct usb_serial_port *port)
 	__u16 interface = 0;
 	int val = 0;
 
-	dev_dbg(&port->dev, "%s", __func__);
+	dev_dbg(&port->dev, "%s\n", __func__);
 
 	portdata = usb_get_serial_port_data(port);
 
@@ -279,7 +266,7 @@ static int sierra_send_setup(struct usb_serial_port *port)
 static void sierra_set_termios(struct tty_struct *tty,
 		struct usb_serial_port *port, struct ktermios *old_termios)
 {
-	dev_dbg(&port->dev, "%s", __func__);
+	dev_dbg(&port->dev, "%s\n", __func__);
 	tty_termios_copy_hw(tty->termios, old_termios);
 	sierra_send_setup(port);
 }
@@ -290,7 +277,7 @@ static int sierra_tiocmget(struct tty_struct *tty, struct file *file)
 	unsigned int value;
 	struct sierra_port_private *portdata;
 
-	dev_dbg(&port->dev, "%s", __func__);
+	dev_dbg(&port->dev, "%s\n", __func__);
 	portdata = usb_get_serial_port_data(port);
 
 	value = ((portdata->rts_state) ? TIOCM_RTS : 0) |
@@ -330,14 +317,14 @@ static void sierra_outdat_callback(struct urb *urb)
 	int status = urb->status;
 	unsigned long flags;
 
-	dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
+	dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 
 	/* free up the transfer buffer, as usb_free_urb() does not do this */
 	kfree(urb->transfer_buffer);
 
 	if (status)
 		dev_dbg(&port->dev, "%s - nonzero write bulk status "
-		    "received: %d", __func__, status);
+		    "received: %d\n", __func__, status);
 
 	spin_lock_irqsave(&portdata->lock, flags);
 	--portdata->outstanding_urbs;
@@ -355,50 +342,61 @@ static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 	unsigned long flags;
 	unsigned char *buffer;
 	struct urb *urb;
-	int status;
+	size_t writesize = min((size_t)count, (size_t)MAX_TRANSFER);
+	int retval = 0;
+
+	/* verify that we actually have some data to write */
+	if (count == 0)
+		return 0;
 
 	portdata = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s: write (%d chars)", __func__, count);
+	dev_dbg(&port->dev, "%s: write (%d bytes)\n", __func__, writesize);
 
 	spin_lock_irqsave(&portdata->lock, flags);
+	dev_dbg(&port->dev, "%s - outstanding_urbs: %d\n", __func__,
+		portdata->outstanding_urbs);
 	if (portdata->outstanding_urbs > N_OUT_URB) {
 		spin_unlock_irqrestore(&portdata->lock, flags);
 		dev_dbg(&port->dev, "%s - write limit hit\n", __func__);
 		return 0;
 	}
 	portdata->outstanding_urbs++;
+	dev_dbg(&port->dev, "%s - 1, outstanding_urbs: %d\n", __func__,
+		portdata->outstanding_urbs);
 	spin_unlock_irqrestore(&portdata->lock, flags);
 
-	buffer = kmalloc(count, GFP_ATOMIC);
+	buffer = kmalloc(writesize, GFP_ATOMIC);
 	if (!buffer) {
 		dev_err(&port->dev, "out of memory\n");
-		count = -ENOMEM;
+		retval = -ENOMEM;
 		goto error_no_buffer;
 	}
 
 	urb = usb_alloc_urb(0, GFP_ATOMIC);
 	if (!urb) {
 		dev_err(&port->dev, "no more free urbs\n");
-		count = -ENOMEM;
+		retval = -ENOMEM;
 		goto error_no_urb;
 	}
 
-	memcpy(buffer, buf, count);
+	memcpy(buffer, buf, writesize);
 
-	usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
+	usb_serial_debug_data(debug, &port->dev, __func__, writesize, buffer);
 
 	usb_fill_bulk_urb(urb, serial->dev,
 			  usb_sndbulkpipe(serial->dev,
 					  port->bulk_out_endpointAddress),
-			  buffer, count, sierra_outdat_callback, port);
+			  buffer, writesize, sierra_outdat_callback, port);
+
+	/* Handle the need to send a zero length packet */
+	urb->transfer_flags |= URB_ZERO_PACKET;
 
 	/* send it down the pipe */
-	status = usb_submit_urb(urb, GFP_ATOMIC);
-	if (status) {
+	retval = usb_submit_urb(urb, GFP_ATOMIC);
+	if (retval) {
 		dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
-			"with status = %d\n", __func__, status);
-		count = status;
+			"with status = %d\n", __func__, retval);
 		goto error;
 	}
 
@@ -406,7 +404,7 @@ static int sierra_write(struct tty_struct *tty, struct usb_serial_port *port,
 	 * really free it when it is finished with it */
 	usb_free_urb(urb);
 
-	return count;
+	return writesize;
 error:
 	usb_free_urb(urb);
 error_no_urb:
@@ -414,8 +412,10 @@ error_no_urb:
 error_no_buffer:
 	spin_lock_irqsave(&portdata->lock, flags);
 	--portdata->outstanding_urbs;
+	dev_dbg(&port->dev, "%s - 2. outstanding_urbs: %d\n", __func__,
+		portdata->outstanding_urbs);
 	spin_unlock_irqrestore(&portdata->lock, flags);
-	return count;
+	return retval;
 }
 
 static void sierra_indat_callback(struct urb *urb)
@@ -427,33 +427,39 @@ static void sierra_indat_callback(struct urb *urb)
 	unsigned char *data = urb->transfer_buffer;
 	int status = urb->status;
 
-	dbg("%s: %p", __func__, urb);
-
 	endpoint = usb_pipeendpoint(urb->pipe);
 	port =  urb->context;
 
+	dev_dbg(&port->dev, "%s: %p\n", __func__, urb);
+
 	if (status) {
 		dev_dbg(&port->dev, "%s: nonzero status: %d on"
-		    " endpoint %02x.", __func__, status, endpoint);
+			" endpoint %02x\n", __func__, status, endpoint);
 	} else {
 		if (urb->actual_length) {
 			tty = tty_port_tty_get(&port->port);
+
 			tty_buffer_request_room(tty, urb->actual_length);
 			tty_insert_flip_string(tty, data, urb->actual_length);
 			tty_flip_buffer_push(tty);
+
 			tty_kref_put(tty);
-		} else
+			usb_serial_debug_data(debug, &port->dev, __func__,
+				urb->actual_length, data);
+		} else {
 			dev_dbg(&port->dev, "%s: empty read urb"
-				" received", __func__);
-
-		/* Resubmit urb so we continue receiving */
-		if (port->port.count && status != -ESHUTDOWN) {
-			err = usb_submit_urb(urb, GFP_ATOMIC);
-			if (err)
-				dev_err(&port->dev, "resubmit read urb failed."
-					"(%d)\n", err);
+				" received\n", __func__);
 		}
 	}
+
+	/* Resubmit urb so we continue receiving */
+	if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
+		err = usb_submit_urb(urb, GFP_ATOMIC);
+		if (err)
+			dev_err(&port->dev, "resubmit read urb failed."
+				"(%d)\n", err);
+	}
+
 	return;
 }
 
@@ -465,8 +471,7 @@ static void sierra_instat_callback(struct urb *urb)
 	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 	struct usb_serial *serial = port->serial;
 
-	dev_dbg(&port->dev, "%s", __func__);
-	dev_dbg(&port->dev, "%s: urb %p port %p has data %p", __func__,
+	dev_dbg(&port->dev, "%s: urb %p port %p has data %p\n", __func__,
 		urb, port, portdata);
 
 	if (status == 0) {
@@ -486,7 +491,7 @@ static void sierra_instat_callback(struct urb *urb)
 					sizeof(struct usb_ctrlrequest));
 			struct tty_struct *tty;
 
-			dev_dbg(&port->dev, "%s: signal x%x", __func__,
+			dev_dbg(&port->dev, "%s: signal x%x\n", __func__,
 				signals);
 
 			old_dcd_state = portdata->dcd_state;
@@ -501,20 +506,20 @@ static void sierra_instat_callback(struct urb *urb)
 				tty_hangup(tty);
 			tty_kref_put(tty);
 		} else {
-			dev_dbg(&port->dev, "%s: type %x req %x",
+			dev_dbg(&port->dev, "%s: type %x req %x\n",
 				__func__, req_pkt->bRequestType,
 				req_pkt->bRequest);
 		}
 	} else
-		dev_dbg(&port->dev, "%s: error %d", __func__, status);
+		dev_dbg(&port->dev, "%s: error %d\n", __func__, status);
 
 	/* Resubmit urb so we continue receiving IRQ data */
-	if (status != -ESHUTDOWN) {
+	if (port->port.count && status != -ESHUTDOWN && status != -ENOENT) {
 		urb->dev = serial->dev;
 		err = usb_submit_urb(urb, GFP_ATOMIC);
 		if (err)
-			dev_dbg(&port->dev, "%s: resubmit intr urb "
-				"failed. (%d)",	__func__, err);
+			dev_err(&port->dev, "%s: resubmit intr urb "
+				"failed. (%d)\n", __func__, err);
 	}
 }
 
@@ -524,7 +529,7 @@ static int sierra_write_room(struct tty_struct *tty)
 	struct sierra_port_private *portdata = usb_get_serial_port_data(port);
 	unsigned long flags;
 
-	dev_dbg(&port->dev, "%s - port %d", __func__, port->number);
+	dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
 
 	/* try to give a good number back based on if we have any free urbs at
 	 * this point in time */
@@ -550,7 +555,7 @@ static int sierra_open(struct tty_struct *tty,
 
 	portdata = usb_get_serial_port_data(port);
 
-	dev_dbg(&port->dev, "%s", __func__);
+	dev_dbg(&port->dev, "%s\n", __func__);
 
 	/* Set some sane defaults */
 	portdata->rts_state = 1;
@@ -562,7 +567,7 @@ static int sierra_open(struct tty_struct *tty,
 		if (!urb)
 			continue;
 		if (urb->dev != serial->dev) {
-			dev_dbg(&port->dev, "%s: dev %p != %p",
+			dev_dbg(&port->dev, "%s: dev %p != %p\n",
 				 __func__, urb->dev, serial->dev);
 			continue;
 		}
@@ -615,7 +620,7 @@ static void sierra_close(struct usb_serial_port *port)
 	struct usb_serial *serial = port->serial;
 	struct sierra_port_private *portdata;
 
-	dev_dbg(&port->dev, "%s", __func__);
+	dev_dbg(&port->dev, "%s\n", __func__);
 	portdata = usb_get_serial_port_data(port);
 
 	if (serial->dev) {
@@ -634,7 +639,7 @@ static int sierra_startup(struct usb_serial *serial)
 	int i;
 	int j;
 
-	dev_dbg(&serial->dev->dev, "%s", __func__);
+	dev_dbg(&serial->dev->dev, "%s\n", __func__);
 
 	/* Set Device mode to D0 */
 	sierra_set_power_state(serial->dev, 0x0000);
@@ -649,7 +654,7 @@ static int sierra_startup(struct usb_serial *serial)
 		portdata = kzalloc(sizeof(*portdata), GFP_KERNEL);
 		if (!portdata) {
 			dev_dbg(&port->dev, "%s: kmalloc for "
-				"sierra_port_private (%d) failed!.",
+				"sierra_port_private (%d) failed!\n",
 				__func__, i);
 			return -ENOMEM;
 		}
@@ -671,7 +676,7 @@ static int sierra_startup(struct usb_serial *serial)
 			urb = usb_alloc_urb(0, GFP_KERNEL);
 			if (urb == NULL) {
 				dev_dbg(&port->dev, "%s: alloc for in "
-					"port failed.", __func__);
+					"port failed.\n", __func__);
 				continue;
 			}
 			/* Fill URB using supplied data. */
@@ -693,7 +698,7 @@ static void sierra_shutdown(struct usb_serial *serial)
 	struct usb_serial_port *port;
 	struct sierra_port_private *portdata;
 
-	dev_dbg(&serial->dev->dev, "%s", __func__);
+	dev_dbg(&serial->dev->dev, "%s\n", __func__);
 
 	for (i = 0; i < serial->num_ports; ++i) {
 		port = serial->port[i];
diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c
index 6c9cbb59552a..614800972dc3 100644
--- a/drivers/usb/serial/usb_debug.c
+++ b/drivers/usb/serial/usb_debug.c
@@ -15,7 +15,19 @@
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
 
+#define URB_DEBUG_MAX_IN_FLIGHT_URBS	4000
 #define USB_DEBUG_MAX_PACKET_SIZE	8
+#define USB_DEBUG_BRK_SIZE		8
+static char USB_DEBUG_BRK[USB_DEBUG_BRK_SIZE] = {
+	0x00,
+	0xff,
+	0x01,
+	0xfe,
+	0x00,
+	0xfe,
+	0x01,
+	0xff,
+};
 
 static struct usb_device_id id_table [] = {
 	{ USB_DEVICE(0x0525, 0x127a) },
@@ -38,6 +50,32 @@ static int usb_debug_open(struct tty_struct *tty, struct usb_serial_port *port,
 	return usb_serial_generic_open(tty, port, filp);
 }
 
+/* This HW really does not support a serial break, so one will be
+ * emulated when ever the break state is set to true.
+ */
+static void usb_debug_break_ctl(struct tty_struct *tty, int break_state)
+{
+	struct usb_serial_port *port = tty->driver_data;
+	if (!break_state)
+		return;
+	usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE);
+}
+
+static void usb_debug_read_bulk_callback(struct urb *urb)
+{
+	struct usb_serial_port *port = urb->context;
+
+	if (urb->actual_length == USB_DEBUG_BRK_SIZE &&
+	    memcmp(urb->transfer_buffer, USB_DEBUG_BRK,
+		   USB_DEBUG_BRK_SIZE) == 0) {
+		usb_serial_handle_break(port);
+		usb_serial_generic_resubmit_read_urb(port, GFP_ATOMIC);
+		return;
+	}
+
+	usb_serial_generic_read_bulk_callback(urb);
+}
+
 static struct usb_serial_driver debug_device = {
 	.driver = {
 		.owner =	THIS_MODULE,
@@ -46,6 +84,9 @@ static struct usb_serial_driver debug_device = {
 	.id_table =		id_table,
 	.num_ports =		1,
 	.open =			usb_debug_open,
+	.max_in_flight_urbs =	URB_DEBUG_MAX_IN_FLIGHT_URBS,
+	.break_ctl =		usb_debug_break_ctl,
+	.read_bulk_callback =	usb_debug_read_bulk_callback,
 };
 
 static int __init debug_init(void)
diff --git a/drivers/usb/storage/initializers.c b/drivers/usb/storage/initializers.c
index 2dd9bd4bff56..ec17c96371af 100644
--- a/drivers/usb/storage/initializers.c
+++ b/drivers/usb/storage/initializers.c
@@ -52,7 +52,7 @@ int usb_stor_euscsi_init(struct us_data *us)
 	us->iobuf[0] = 0x1;
 	result = usb_stor_control_msg(us, us->send_ctrl_pipe,
 			0x0C, USB_RECIP_INTERFACE | USB_TYPE_VENDOR,
-			0x01, 0x0, us->iobuf, 0x1, 5*HZ);
+			0x01, 0x0, us->iobuf, 0x1, 5000);
 	US_DEBUGP("-- result is %d\n", result);
 
 	return 0;
@@ -80,14 +80,16 @@ int usb_stor_ucr61s2b_init(struct us_data *us)
 
 	res = usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe, bcb,
 			US_BULK_CB_WRAP_LEN, &partial);
-	if(res)
-		return res;
+	if (res)
+		return -EIO;
 
 	US_DEBUGP("Getting status packet...\n");
 	res = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe, bcs,
 			US_BULK_CS_WRAP_LEN, &partial);
+	if (res)
+		return -EIO;
 
-	return (res ? -1 : 0);
+	return 0;
 }
 
 /* This places the HUAWEI E220 devices in multi-port mode */
@@ -99,6 +101,6 @@ int usb_stor_huawei_e220_init(struct us_data *us)
 				      USB_REQ_SET_FEATURE,
 				      USB_TYPE_STANDARD | USB_RECIP_DEVICE,
 				      0x01, 0x0, NULL, 0x0, 1000);
-	US_DEBUGP("usb_control_msg performing result is %d\n", result);
-	return (result ? 0 : -1);
+	US_DEBUGP("Huawei mode set result is %d\n", result);
+	return (result ? 0 : -ENODEV);
 }
diff --git a/drivers/usb/storage/option_ms.c b/drivers/usb/storage/option_ms.c
index 353f922939a4..126ea3424c03 100644
--- a/drivers/usb/storage/option_ms.c
+++ b/drivers/usb/storage/option_ms.c
@@ -94,7 +94,8 @@ int option_ms_init(struct us_data *us)
 	 */
 	if (udev->descriptor.bDeviceClass != 0 ||
 	    udev->descriptor.bDeviceSubClass != 0 ||
-	    udev->descriptor.bDeviceProtocol != 0)
+	    udev->descriptor.bDeviceProtocol != 0 ||
+	    udev->actconfig->desc.bNumInterfaces == 3)
 		return USB_STOR_TRANSPORT_GOOD;
 
 	US_DEBUGP("Option MS: option_ms_init called\n");
diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 4b8b69045fe6..1b9c5dd0fb27 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -1385,7 +1385,7 @@ UNUSUAL_DEV(  0x10d6, 0x2200, 0x0100, 0x0100,
 UNUSUAL_DEV(  0x1186, 0x3e04, 0x0000, 0x0000,
            "D-Link",
            "USB Mass Storage",
-           US_SC_DEVICE, US_PR_DEVICE, option_ms_init, 0),
+           US_SC_DEVICE, US_PR_DEVICE, option_ms_init, US_FL_IGNORE_DEVICE),
 
 /* Reported by Kevin Lloyd <linux@sierrawireless.com>
  * Entry is needed for the initializer function override,
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 9367b6297d84..89cd2deeb4af 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -513,7 +513,7 @@ befs_utf2nls(struct super_block *sb, const char *in,
 {
 	struct nls_table *nls = BEFS_SB(sb)->nls;
 	int i, o;
-	wchar_t uni;
+	unicode_t uni;
 	int unilen, utflen;
 	char *result;
 	/* The utf8->nls conversion won't make the final nls string bigger
@@ -539,16 +539,16 @@ befs_utf2nls(struct super_block *sb, const char *in,
 	for (i = o = 0; i < in_len; i += utflen, o += unilen) {
 
 		/* convert from UTF-8 to Unicode */
-		utflen = utf8_mbtowc(&uni, &in[i], in_len - i);
-		if (utflen < 0) {
+		utflen = utf8_to_utf32(&in[i], in_len - i, &uni);
+		if (utflen < 0)
 			goto conv_err;
-		}
 
 		/* convert from Unicode to nls */
+		if (uni > MAX_WCHAR_T)
+			goto conv_err;
 		unilen = nls->uni2char(uni, &result[o], in_len - o);
-		if (unilen < 0) {
+		if (unilen < 0)
 			goto conv_err;
-		}
 	}
 	result[o] = '\0';
 	*out_len = o;
@@ -619,15 +619,13 @@ befs_nls2utf(struct super_block *sb, const char *in,
 
 		/* convert from nls to unicode */
 		unilen = nls->char2uni(&in[i], in_len - i, &uni);
-		if (unilen < 0) {
+		if (unilen < 0)
 			goto conv_err;
-		}
 
 		/* convert from unicode to UTF-8 */
-		utflen = utf8_wctomb(&result[o], uni, 3);
-		if (utflen <= 0) {
+		utflen = utf32_to_utf8(uni, &result[o], 3);
+		if (utflen <= 0)
 			goto conv_err;
-		}
 	}
 
 	result[o] = '\0';
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 3a7f603b6982..0540628a3405 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -22,6 +22,19 @@
 #include <asm/uaccess.h>
 #include "fat.h"
 
+/*
+ * Maximum buffer size of short name.
+ * [(MSDOS_NAME + '.') * max one char + nul]
+ * For msdos style, ['.' (hidden) + MSDOS_NAME + '.' + nul]
+ */
+#define FAT_MAX_SHORT_SIZE	((MSDOS_NAME + 1) * NLS_MAX_CHARSET_SIZE + 1)
+/*
+ * Maximum buffer size of unicode chars from slots.
+ * [(max longname slots * 13 (size in a slot) + nul) * sizeof(wchar_t)]
+ */
+#define FAT_MAX_UNI_CHARS	((MSDOS_SLOTS - 1) * 13 + 1)
+#define FAT_MAX_UNI_SIZE	(FAT_MAX_UNI_CHARS * sizeof(wchar_t))
+
 static inline loff_t fat_make_i_pos(struct super_block *sb,
 				    struct buffer_head *bh,
 				    struct msdos_dir_entry *de)
@@ -171,7 +184,8 @@ static inline int fat_uni_to_x8(struct msdos_sb_info *sbi, const wchar_t *uni,
 				unsigned char *buf, int size)
 {
 	if (sbi->options.utf8)
-		return utf8_wcstombs(buf, uni, size);
+		return utf16s_to_utf8s(uni, FAT_MAX_UNI_CHARS,
+				UTF16_HOST_ENDIAN, buf, size);
 	else
 		return uni16_to_x8(buf, uni, size, sbi->options.unicode_xlate,
 				   sbi->nls_io);
@@ -325,19 +339,6 @@ parse_long:
 }
 
 /*
- * Maximum buffer size of short name.
- * [(MSDOS_NAME + '.') * max one char + nul]
- * For msdos style, ['.' (hidden) + MSDOS_NAME + '.' + nul]
- */
-#define FAT_MAX_SHORT_SIZE	((MSDOS_NAME + 1) * NLS_MAX_CHARSET_SIZE + 1)
-/*
- * Maximum buffer size of unicode chars from slots.
- * [(max longname slots * 13 (size in a slot) + nul) * sizeof(wchar_t)]
- */
-#define FAT_MAX_UNI_CHARS	((MSDOS_SLOTS - 1) * 13 + 1)
-#define FAT_MAX_UNI_SIZE	(FAT_MAX_UNI_CHARS * sizeof(wchar_t))
-
-/*
  * Return values: negative -> error, 0 -> not found, positive -> found,
  * value is the total amount of slots, including the shortname entry.
  */
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index a0e00e3a46e9..00bd52694e6b 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -502,11 +502,11 @@ xlate_to_uni(const unsigned char *name, int len, unsigned char *outname,
 	if (utf8) {
 		int name_len = strlen(name);
 
-		*outlen = utf8_mbstowcs((wchar_t *)outname, name, PATH_MAX);
+		*outlen = utf8s_to_utf16s(name, PATH_MAX, (wchar_t *) outname);
 
 		/*
 		 * We stripped '.'s before and set len appropriately,
-		 * but utf8_mbstowcs doesn't care about len
+		 * but utf8s_to_utf16s doesn't care about len
 		 */
 		*outlen -= (name_len - len);
 
diff --git a/fs/isofs/joliet.c b/fs/isofs/joliet.c
index 92c14b850e9c..a048de81c093 100644
--- a/fs/isofs/joliet.c
+++ b/fs/isofs/joliet.c
@@ -37,37 +37,6 @@ uni16_to_x8(unsigned char *ascii, __be16 *uni, int len, struct nls_table *nls)
 	return (op - ascii);
 }
 
-/* Convert big endian wide character string to utf8 */
-static int
-wcsntombs_be(__u8 *s, const __u8 *pwcs, int inlen, int maxlen)
-{
-	const __u8 *ip;
-	__u8 *op;
-	int size;
-	__u16 c;
-
-	op = s;
-	ip = pwcs;
-	while ((*ip || ip[1]) && (maxlen > 0) && (inlen > 0)) {
-		c = (*ip << 8) | ip[1];
-		if (c > 0x7f) {
-			size = utf8_wctomb(op, c, maxlen);
-			if (size == -1) {
-				/* Ignore character and move on */
-				maxlen--;
-			} else {
-				op += size;
-				maxlen -= size;
-			}
-		} else {
-			*op++ = (__u8) c;
-		}
-		ip += 2;
-		inlen--;
-	}
-	return (op - s);
-}
-
 int
 get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, struct inode * inode)
 {
@@ -79,8 +48,9 @@ get_joliet_filename(struct iso_directory_record * de, unsigned char *outname, st
 	nls = ISOFS_SB(inode->i_sb)->s_nls_iocharset;
 
 	if (utf8) {
-		len = wcsntombs_be(outname, de->name,
-				de->name_len[0] >> 1, PAGE_SIZE);
+		len = utf16s_to_utf8s((const wchar_t *) de->name,
+				de->name_len[0] >> 1, UTF16_BIG_ENDIAN,
+				outname, PAGE_SIZE);
 	} else {
 		len = uni16_to_x8(outname, (__be16 *) de->name,
 				de->name_len[0] >> 1, nls);
diff --git a/fs/ncpfs/ncplib_kernel.c b/fs/ncpfs/ncplib_kernel.c
index 97645f112114..0ec6237a5970 100644
--- a/fs/ncpfs/ncplib_kernel.c
+++ b/fs/ncpfs/ncplib_kernel.c
@@ -1113,11 +1113,13 @@ ncp__io2vol(struct ncp_server *server, unsigned char *vname, unsigned int *vlen,
 
 		if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
 			int k;
+			unicode_t u;
 
-			k = utf8_mbtowc(&ec, iname, iname_end - iname);
-			if (k < 0)
+			k = utf8_to_utf32(iname, iname_end - iname, &u);
+			if (k < 0 || u > MAX_WCHAR_T)
 				return -EINVAL;
 			iname += k;
+			ec = u;
 		} else {
 			if (*iname == NCP_ESC) {
 				int k;
@@ -1214,7 +1216,7 @@ ncp__vol2io(struct ncp_server *server, unsigned char *iname, unsigned int *ilen,
 		if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
 			int k;
 
-			k = utf8_wctomb(iname, ec, iname_end - iname);
+			k = utf32_to_utf8(ec, iname, iname_end - iname);
 			if (k < 0) {
 				err = -ENAMETOOLONG;
 				goto quit;
diff --git a/fs/nls/nls_base.c b/fs/nls/nls_base.c
index 9b0efdad8910..477d37d83b31 100644
--- a/fs/nls/nls_base.c
+++ b/fs/nls/nls_base.c
@@ -15,6 +15,7 @@
 #include <linux/errno.h>
 #include <linux/kmod.h>
 #include <linux/spinlock.h>
+#include <asm/byteorder.h>
 
 static struct nls_table default_table;
 static struct nls_table *tables = &default_table;
@@ -43,10 +44,17 @@ static const struct utf8_table utf8_table[] =
     {0,						       /* end of table    */}
 };
 
-int
-utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
+#define UNICODE_MAX	0x0010ffff
+#define PLANE_SIZE	0x00010000
+
+#define SURROGATE_MASK	0xfffff800
+#define SURROGATE_PAIR	0x0000d800
+#define SURROGATE_LOW	0x00000400
+#define SURROGATE_BITS	0x000003ff
+
+int utf8_to_utf32(const u8 *s, int len, unicode_t *pu)
 {
-	long l;
+	unsigned long l;
 	int c0, c, nc;
 	const struct utf8_table *t;
   
@@ -57,12 +65,13 @@ utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
 		nc++;
 		if ((c0 & t->cmask) == t->cval) {
 			l &= t->lmask;
-			if (l < t->lval)
+			if (l < t->lval || l > UNICODE_MAX ||
+					(l & SURROGATE_MASK) == SURROGATE_PAIR)
 				return -1;
-			*p = l;
+			*pu = (unicode_t) l;
 			return nc;
 		}
-		if (n <= nc)
+		if (len <= nc)
 			return -1;
 		s++;
 		c = (*s ^ 0x80) & 0xFF;
@@ -72,90 +81,133 @@ utf8_mbtowc(wchar_t *p, const __u8 *s, int n)
 	}
 	return -1;
 }
+EXPORT_SYMBOL(utf8_to_utf32);
 
-int
-utf8_mbstowcs(wchar_t *pwcs, const __u8 *s, int n)
+int utf32_to_utf8(unicode_t u, u8 *s, int maxlen)
 {
-	__u16 *op;
-	const __u8 *ip;
-	int size;
-
-	op = pwcs;
-	ip = s;
-	while (*ip && n > 0) {
-		if (*ip & 0x80) {
-			size = utf8_mbtowc(op, ip, n);
-			if (size == -1) {
-				/* Ignore character and move on */
-				ip++;
-				n--;
-			} else {
-				op++;
-				ip += size;
-				n -= size;
-			}
-		} else {
-			*op++ = *ip++;
-			n--;
-		}
-	}
-	return (op - pwcs);
-}
-
-int
-utf8_wctomb(__u8 *s, wchar_t wc, int maxlen)
-{
-	long l;
+	unsigned long l;
 	int c, nc;
 	const struct utf8_table *t;
-  
+
 	if (!s)
 		return 0;
-  
-	l = wc;
+
+	l = u;
+	if (l > UNICODE_MAX || (l & SURROGATE_MASK) == SURROGATE_PAIR)
+		return -1;
+
 	nc = 0;
 	for (t = utf8_table; t->cmask && maxlen; t++, maxlen--) {
 		nc++;
 		if (l <= t->lmask) {
 			c = t->shift;
-			*s = t->cval | (l >> c);
+			*s = (u8) (t->cval | (l >> c));
 			while (c > 0) {
 				c -= 6;
 				s++;
-				*s = 0x80 | ((l >> c) & 0x3F);
+				*s = (u8) (0x80 | ((l >> c) & 0x3F));
 			}
 			return nc;
 		}
 	}
 	return -1;
 }
+EXPORT_SYMBOL(utf32_to_utf8);
 
-int
-utf8_wcstombs(__u8 *s, const wchar_t *pwcs, int maxlen)
+int utf8s_to_utf16s(const u8 *s, int len, wchar_t *pwcs)
 {
-	const __u16 *ip;
-	__u8 *op;
+	u16 *op;
 	int size;
+	unicode_t u;
+
+	op = pwcs;
+	while (*s && len > 0) {
+		if (*s & 0x80) {
+			size = utf8_to_utf32(s, len, &u);
+			if (size < 0) {
+				/* Ignore character and move on */
+				size = 1;
+			} else if (u >= PLANE_SIZE) {
+				u -= PLANE_SIZE;
+				*op++ = (wchar_t) (SURROGATE_PAIR |
+						((u >> 10) & SURROGATE_BITS));
+				*op++ = (wchar_t) (SURROGATE_PAIR |
+						SURROGATE_LOW |
+						(u & SURROGATE_BITS));
+			} else {
+				*op++ = (wchar_t) u;
+			}
+			s += size;
+			len -= size;
+		} else {
+			*op++ = *s++;
+			len--;
+		}
+	}
+	return op - pwcs;
+}
+EXPORT_SYMBOL(utf8s_to_utf16s);
+
+static inline unsigned long get_utf16(unsigned c, enum utf16_endian endian)
+{
+	switch (endian) {
+	default:
+		return c;
+	case UTF16_LITTLE_ENDIAN:
+		return __le16_to_cpu(c);
+	case UTF16_BIG_ENDIAN:
+		return __be16_to_cpu(c);
+	}
+}
+
+int utf16s_to_utf8s(const wchar_t *pwcs, int len, enum utf16_endian endian,
+		u8 *s, int maxlen)
+{
+	u8 *op;
+	int size;
+	unsigned long u, v;
 
 	op = s;
-	ip = pwcs;
-	while (*ip && maxlen > 0) {
-		if (*ip > 0x7f) {
-			size = utf8_wctomb(op, *ip, maxlen);
+	while (len > 0 && maxlen > 0) {
+		u = get_utf16(*pwcs, endian);
+		if (!u)
+			break;
+		pwcs++;
+		len--;
+		if (u > 0x7f) {
+			if ((u & SURROGATE_MASK) == SURROGATE_PAIR) {
+				if (u & SURROGATE_LOW) {
+					/* Ignore character and move on */
+					continue;
+				}
+				if (len <= 0)
+					break;
+				v = get_utf16(*pwcs, endian);
+				if ((v & SURROGATE_MASK) != SURROGATE_PAIR ||
+						!(v & SURROGATE_LOW)) {
+					/* Ignore character and move on */
+					continue;
+				}
+				u = PLANE_SIZE + ((u & SURROGATE_BITS) << 10)
+						+ (v & SURROGATE_BITS);
+				pwcs++;
+				len--;
+			}
+			size = utf32_to_utf8(u, op, maxlen);
 			if (size == -1) {
 				/* Ignore character and move on */
-				maxlen--;
 			} else {
 				op += size;
 				maxlen -= size;
 			}
 		} else {
-			*op++ = (__u8) *ip;
+			*op++ = (u8) u;
+			maxlen--;
 		}
-		ip++;
 	}
-	return (op - s);
+	return op - s;
 }
+EXPORT_SYMBOL(utf16s_to_utf8s);
 
 int register_nls(struct nls_table * nls)
 {
@@ -467,9 +519,5 @@ EXPORT_SYMBOL(unregister_nls);
 EXPORT_SYMBOL(unload_nls);
 EXPORT_SYMBOL(load_nls);
 EXPORT_SYMBOL(load_nls_default);
-EXPORT_SYMBOL(utf8_mbtowc);
-EXPORT_SYMBOL(utf8_mbstowcs);
-EXPORT_SYMBOL(utf8_wctomb);
-EXPORT_SYMBOL(utf8_wcstombs);
 
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/fs/nls/nls_utf8.c b/fs/nls/nls_utf8.c
index aa2c42fdd977..0d60a44acacd 100644
--- a/fs/nls/nls_utf8.c
+++ b/fs/nls/nls_utf8.c
@@ -15,7 +15,11 @@ static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
 {
 	int n;
 
-	if ( (n = utf8_wctomb(out, uni, boundlen)) == -1) {
+	if (boundlen <= 0)
+		return -ENAMETOOLONG;
+
+	n = utf32_to_utf8(uni, out, boundlen);
+	if (n < 0) {
 		*out = '?';
 		return -EINVAL;
 	}
@@ -25,11 +29,14 @@ static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
 {
 	int n;
+	unicode_t u;
 
-	if ( (n = utf8_mbtowc(uni, rawstring, boundlen)) == -1) {
+	n = utf8_to_utf32(rawstring, boundlen, &u);
+	if (n < 0 || u > MAX_WCHAR_T) {
 		*uni = 0x003f;	/* ? */
-		n = -EINVAL;
+		return -EINVAL;
 	}
+	*uni = (wchar_t) u;
 	return n;
 }
 
diff --git a/include/linux/nls.h b/include/linux/nls.h
index 52b1a76c1b43..d47beef08dfd 100644
--- a/include/linux/nls.h
+++ b/include/linux/nls.h
@@ -3,8 +3,23 @@
 
 #include <linux/init.h>
 
-/* unicode character */
-typedef __u16 wchar_t;
+/* Unicode has changed over the years.  Unicode code points no longer
+ * fit into 16 bits; as of Unicode 5 valid code points range from 0
+ * to 0x10ffff (17 planes, where each plane holds 65536 code points).
+ *
+ * The original decision to represent Unicode characters as 16-bit
+ * wchar_t values is now outdated.  But plane 0 still includes the
+ * most commonly used characters, so we will retain it.  The newer
+ * 32-bit unicode_t type can be used when it is necessary to
+ * represent the full Unicode character set.
+ */
+
+/* Plane-0 Unicode character */
+typedef u16 wchar_t;
+#define MAX_WCHAR_T	0xffff
+
+/* Arbitrary Unicode character */
+typedef u32 unicode_t;
 
 struct nls_table {
 	const char *charset;
@@ -21,6 +36,13 @@ struct nls_table {
 /* this value hold the maximum octet of charset */
 #define NLS_MAX_CHARSET_SIZE 6 /* for UTF-8 */
 
+/* Byte order for UTF-16 strings */
+enum utf16_endian {
+	UTF16_HOST_ENDIAN,
+	UTF16_LITTLE_ENDIAN,
+	UTF16_BIG_ENDIAN
+};
+
 /* nls.c */
 extern int register_nls(struct nls_table *);
 extern int unregister_nls(struct nls_table *);
@@ -28,10 +50,11 @@ extern struct nls_table *load_nls(char *);
 extern void unload_nls(struct nls_table *);
 extern struct nls_table *load_nls_default(void);
 
-extern int utf8_mbtowc(wchar_t *, const __u8 *, int);
-extern int utf8_mbstowcs(wchar_t *, const __u8 *, int);
-extern int utf8_wctomb(__u8 *, wchar_t, int);
-extern int utf8_wcstombs(__u8 *, const wchar_t *, int);
+extern int utf8_to_utf32(const u8 *s, int len, unicode_t *pu);
+extern int utf32_to_utf8(unicode_t u, u8 *s, int maxlen);
+extern int utf8s_to_utf16s(const u8 *s, int len, wchar_t *pwcs);
+extern int utf16s_to_utf8s(const wchar_t *pwcs, int len,
+		enum utf16_endian endian, u8 *s, int maxlen);
 
 static inline unsigned char nls_tolower(struct nls_table *t, unsigned char c)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 19ee92c53ef7..934edb0451da 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -124,6 +124,14 @@ typedef int __bitwise pci_power_t;
 #define PCI_UNKNOWN	((pci_power_t __force) 5)
 #define PCI_POWER_ERROR	((pci_power_t __force) -1)
 
+/* Remember to update this when the list above changes! */
+extern const char *pci_power_names[];
+
+static inline const char *pci_power_name(pci_power_t state)
+{
+	return pci_power_names[1 + (int) state];
+}
+
 #define PCI_PM_D2_DELAY	200
 #define PCI_PM_D3_WAIT	10
 #define PCI_PM_BUS_WAIT	50
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 7e3b909849c8..8771e2fd8ebe 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -104,6 +104,7 @@
 #define PCI_CLASS_SERIAL_USB_UHCI	0x0c0300
 #define PCI_CLASS_SERIAL_USB_OHCI	0x0c0310
 #define PCI_CLASS_SERIAL_USB_EHCI	0x0c0320
+#define PCI_CLASS_SERIAL_USB_XHCI	0x0c0330
 #define PCI_CLASS_SERIAL_FIBER		0x0c04
 #define PCI_CLASS_SERIAL_SMBUS		0x0c05
 
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 34cdfcac4555..84929e914034 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -36,6 +36,7 @@ struct wusb_dev;
  *  - configs have one (often) or more interfaces;
  *  - interfaces have one (usually) or more settings;
  *  - each interface setting has zero or (usually) more endpoints.
+ *  - a SuperSpeed endpoint has a companion descriptor
  *
  * And there might be other descriptors mixed in with those.
  *
@@ -44,6 +45,19 @@ struct wusb_dev;
 
 struct ep_device;
 
+/* For SS devices */
+/**
+ * struct usb_host_ss_ep_comp - Valid for SuperSpeed devices only
+ * @desc: endpoint companion descriptor, wMaxPacketSize in native byteorder
+ * @extra: descriptors following this endpoint companion descriptor
+ * @extralen: how many bytes of "extra" are valid
+ */
+struct usb_host_ss_ep_comp {
+	struct usb_ss_ep_comp_descriptor	desc;
+	unsigned char				*extra;   /* Extra descriptors */
+	int					extralen;
+};
+
 /**
  * struct usb_host_endpoint - host-side endpoint descriptor and queue
  * @desc: descriptor for this endpoint, wMaxPacketSize in native byteorder
@@ -51,6 +65,7 @@ struct ep_device;
  * @hcpriv: for use by HCD; typically holds hardware dma queue head (QH)
  *	with one or more transfer descriptors (TDs) per urb
  * @ep_dev: ep_device for sysfs info
+ * @ss_ep_comp: companion descriptor information for this endpoint
  * @extra: descriptors following this endpoint in the configuration
  * @extralen: how many bytes of "extra" are valid
  * @enabled: URBs may be submitted to this endpoint
@@ -63,6 +78,7 @@ struct usb_host_endpoint {
 	struct list_head		urb_list;
 	void				*hcpriv;
 	struct ep_device 		*ep_dev;	/* For sysfs info */
+	struct usb_host_ss_ep_comp	*ss_ep_comp;	/* For SS devices */
 
 	unsigned char *extra;   /* Extra descriptors */
 	int extralen;
@@ -336,7 +352,6 @@ struct usb_bus {
 #ifdef CONFIG_USB_DEVICEFS
 	struct dentry *usbfs_dentry;	/* usbfs dentry entry for the bus */
 #endif
-	struct device *dev;		/* device for this bus */
 
 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
 	struct mon_bus *mon_bus;	/* non-null when associated */
@@ -363,6 +378,7 @@ struct usb_tt;
  * struct usb_device - kernel's representation of a USB device
  * @devnum: device number; address on a USB bus
  * @devpath: device ID string for use in messages (e.g., /port/...)
+ * @route: tree topology hex string for use with xHCI
  * @state: device state: configured, not attached, etc.
  * @speed: device speed: high/full/low (or error)
  * @tt: Transaction Translator info; used with low/full speed dev, highspeed hub
@@ -420,6 +436,7 @@ struct usb_tt;
  * @skip_sys_resume: skip the next system resume
  * @wusb_dev: if this is a Wireless USB device, link to the WUSB
  *	specific data for the device.
+ * @slot_id: Slot ID assigned by xHCI
  *
  * Notes:
  * Usbcore drivers should not set usbdev->state directly.  Instead use
@@ -428,6 +445,7 @@ struct usb_tt;
 struct usb_device {
 	int		devnum;
 	char		devpath [16];
+	u32		route;
 	enum usb_device_state	state;
 	enum usb_device_speed	speed;
 
@@ -503,6 +521,7 @@ struct usb_device {
 	unsigned skip_sys_resume:1;
 #endif
 	struct wusb_dev *wusb_dev;
+	int slot_id;
 };
 #define	to_usb_device(d) container_of(d, struct usb_device, dev)
 
@@ -1044,7 +1063,9 @@ typedef void (*usb_complete_t)(struct urb *);
  * @setup_dma: For control transfers with URB_NO_SETUP_DMA_MAP set, the
  *	device driver has provided this DMA address for the setup packet.
  *	The host controller driver should use this in preference to
- *	setup_packet.
+ *	setup_packet, but the HCD may chose to ignore the address if it must
+ *	copy the setup packet into internal structures.  Therefore, setup_packet
+ *	must always point to a valid buffer.
  * @start_frame: Returns the initial frame for isochronous transfers.
  * @number_of_packets: Lists the number of ISO transfer buffers.
  * @interval: Specifies the polling interval for interrupt or isochronous
@@ -1180,6 +1201,8 @@ struct urb {
 	unsigned int transfer_flags;	/* (in) URB_SHORT_NOT_OK | ...*/
 	void *transfer_buffer;		/* (in) associated data buffer */
 	dma_addr_t transfer_dma;	/* (in) dma addr for transfer_buffer */
+	struct usb_sg_request *sg;	/* (in) scatter gather buffer list */
+	int num_sgs;			/* (in) number of entries in the sg list */
 	u32 transfer_buffer_length;	/* (in) data buffer length */
 	u32 actual_length;		/* (return) actual transfer length */
 	unsigned char *setup_packet;	/* (in) setup packet (control only) */
@@ -1425,8 +1448,8 @@ struct usb_sg_request {
 	int			status;
 	size_t			bytes;
 
-	/*
-	 * members below are private: to usbcore,
+	/* private:
+	 * members below are private to usbcore,
 	 * and are not provided for driver access!
 	 */
 	spinlock_t		lock;
@@ -1561,6 +1584,9 @@ extern void usb_unregister_notify(struct notifier_block *nb);
 #define err(format, arg...) printk(KERN_ERR KBUILD_MODNAME ": " \
 	format "\n" , ## arg)
 
+/* debugfs stuff */
+extern struct dentry *usb_debug_root;
+
 #endif  /* __KERNEL__ */
 
 #endif
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index b145119a90da..93223638f702 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -191,6 +191,8 @@ struct usb_ctrlrequest {
 #define USB_DT_WIRE_ADAPTER		0x21
 #define USB_DT_RPIPE			0x22
 #define USB_DT_CS_RADIO_CONTROL		0x23
+/* From the USB 3.0 spec */
+#define	USB_DT_SS_ENDPOINT_COMP		0x30
 
 /* Conventional codes for class-specific descriptors.  The convention is
  * defined in the USB "Common Class" Spec (3.11).  Individual class specs
@@ -535,6 +537,20 @@ static inline int usb_endpoint_is_isoc_out(
 
 /*-------------------------------------------------------------------------*/
 
+/* USB_DT_SS_ENDPOINT_COMP: SuperSpeed Endpoint Companion descriptor */
+struct usb_ss_ep_comp_descriptor {
+	__u8  bLength;
+	__u8  bDescriptorType;
+
+	__u8  bMaxBurst;
+	__u8  bmAttributes;
+	__u16 wBytesPerInterval;
+} __attribute__ ((packed));
+
+#define USB_DT_SS_EP_COMP_SIZE		6
+
+/*-------------------------------------------------------------------------*/
+
 /* USB_DT_DEVICE_QUALIFIER: Device Qualifier descriptor */
 struct usb_qualifier_descriptor {
 	__u8  bLength;
@@ -752,6 +768,7 @@ enum usb_device_speed {
 	USB_SPEED_LOW, USB_SPEED_FULL,		/* usb 1.1 */
 	USB_SPEED_HIGH,				/* usb 2.0 */
 	USB_SPEED_VARIABLE,			/* wireless (usb 2.5) */
+	USB_SPEED_SUPER,			/* usb 3.0 */
 };
 
 enum usb_device_state {
diff --git a/include/linux/usb/composite.h b/include/linux/usb/composite.h
index acd7b0f06c8a..4f6bb3d2160e 100644
--- a/include/linux/usb/composite.h
+++ b/include/linux/usb/composite.h
@@ -124,6 +124,7 @@ struct usb_function {
 	void			(*suspend)(struct usb_function *);
 	void			(*resume)(struct usb_function *);
 
+	/* private: */
 	/* internals */
 	struct list_head		list;
 };
@@ -219,6 +220,7 @@ struct usb_configuration {
 
 	struct usb_composite_dev	*cdev;
 
+	/* private: */
 	/* internals */
 	struct list_head	list;
 	struct list_head	functions;
@@ -321,6 +323,7 @@ struct usb_composite_dev {
 
 	struct usb_configuration	*config;
 
+	/* private: */
 	/* internals */
 	struct usb_device_descriptor	desc;
 	struct list_head		configs;
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 1aaa826396a1..2443c0e7a80c 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -80,10 +80,10 @@ struct otg_transceiver {
 
 /* for board-specific init logic */
 extern int otg_set_transceiver(struct otg_transceiver *);
-#ifdef CONFIG_NOP_USB_XCEIV
+
+/* sometimes transceivers are accessed only through e.g. ULPI */
 extern void usb_nop_xceiv_register(void);
 extern void usb_nop_xceiv_unregister(void);
-#endif
 
 
 /* for usb host and peripheral controller drivers */
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index 8cdfed738fe4..e29ebcf3287b 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -15,6 +15,7 @@
 
 #include <linux/kref.h>
 #include <linux/mutex.h>
+#include <linux/sysrq.h>
 
 #define SERIAL_TTY_MAJOR	188	/* Nice legal number now */
 #define SERIAL_TTY_MINORS	254	/* loads of devices :) */
@@ -91,11 +92,15 @@ struct usb_serial_port {
 	int			write_urb_busy;
 	__u8			bulk_out_endpointAddress;
 
+	int			tx_bytes_flight;
+	int			urbs_in_flight;
+
 	wait_queue_head_t	write_wait;
 	struct work_struct	work;
 	char			throttled;
 	char			throttle_req;
 	char			console;
+	unsigned long		sysrq; /* sysrq timeout */
 	struct device		dev;
 };
 #define to_usb_serial_port(d) container_of(d, struct usb_serial_port, dev)
@@ -207,6 +212,7 @@ struct usb_serial_driver {
 	struct device_driver	driver;
 	struct usb_driver	*usb_driver;
 	struct usb_dynids	dynids;
+	int			max_in_flight_urbs;
 
 	int (*probe)(struct usb_serial *serial, const struct usb_device_id *id);
 	int (*attach)(struct usb_serial *serial);
@@ -297,6 +303,12 @@ extern void usb_serial_generic_unthrottle(struct tty_struct *tty);
 extern void usb_serial_generic_shutdown(struct usb_serial *serial);
 extern int usb_serial_generic_register(int debug);
 extern void usb_serial_generic_deregister(void);
+extern void usb_serial_generic_resubmit_read_urb(struct usb_serial_port *port,
+						 gfp_t mem_flags);
+extern int usb_serial_handle_sysrq_char(struct usb_serial_port *port,
+					unsigned int ch);
+extern int usb_serial_handle_break(struct usb_serial_port *port);
+
 
 extern int usb_serial_bus_register(struct usb_serial_driver *device);
 extern void usb_serial_bus_deregister(struct usb_serial_driver *device);