Merge branch 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

* 'usb-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (232 commits)
  USB: Add USB-ID for Multiplex RC serial adapter to cp210x.c
  xhci: Clean up 32-bit build warnings.
  USB: update documentation for usbmon
  usb: usb-storage doesn't support dynamic id currently, the patch disables the feature to fix an oops
  drivers/usb/class/cdc-acm.c: clear dangling pointer
  drivers/usb/dwc3/dwc3-pci.c: introduce missing kfree
  drivers/usb/host/isp1760-if.c: introduce missing kfree
  usb: option: add ZD Incorporated HSPA modem
  usb: ch9: fix up MaxStreams helper
  USB: usb-skeleton.c: cleanup open_count
  USB: usb-skeleton.c: fix open/disconnect race
  xhci: Properly handle COMP_2ND_BW_ERR
  USB: remove dead code from suspend/resume path
  USB: add quirk for another camera
  drivers: usb: wusbcore: Fix dependency for USB_WUSB
  xhci: Better debugging for critical host errors.
  xhci: Be less verbose during URB cancellation.
  xhci: Remove debugging about ring structure allocation.
  xhci: Remove debugging about toggling cycle bits.
  xhci: Remove debugging for individual transfers.
  ...

183 files changed, 4727 insertions, 3727 deletions

diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index 89f52440fcf..0e8343f585b 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -212,11 +212,13 @@ kvp_respond_to_host(char *key, char *value, int error)
          * The windows host expects the key/value pair to be encoded
          * in utf16.
          */
-        keylen = utf8s_to_utf16s(key_name, strlen(key_name),
-                                (wchar_t *)kvp_data->data.key);
+        keylen = utf8s_to_utf16s(key_name, strlen(key_name), UTF16_HOST_ENDIAN,
+                                (wchar_t *) kvp_data->data.key,
+                                HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2);
         kvp_data->data.key_size = 2*(keylen + 1); /* utf16 encoding */
-        valuelen = utf8s_to_utf16s(value, strlen(value),
-                                (wchar_t *)kvp_data->data.value);
+        valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN,
+                                (wchar_t *) kvp_data->data.value,
+                                HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2);
         kvp_data->data.value_size = 2*(valuelen + 1); /* utf16 encoding */
 
         kvp_data->data.value_type = REG_SZ; /* all our values are strings */
diff --git a/drivers/usb/Makefile b/drivers/usb/Makefile
index 75eca764522..53a7bc07dd8 100644
--- a/drivers/usb/Makefile
+++ b/drivers/usb/Makefile
@@ -6,6 +6,8 @@
 
 obj-$(CONFIG_USB)               += core/
 
+obj-$(CONFIG_USB_OTG_UTILS)     += otg/
+
 obj-$(CONFIG_USB_DWC3)          += dwc3/
 
 obj-$(CONFIG_USB_MON)           += mon/
@@ -51,7 +53,6 @@ obj-$(CONFIG_USB_SPEEDTOUCH)	+= atm/
 
 obj-$(CONFIG_USB_MUSB_HDRC)     += musb/
 obj-$(CONFIG_USB_RENESAS_USBHS) += renesas_usbhs/
-obj-$(CONFIG_USB_OTG_UTILS)     += otg/
 obj-$(CONFIG_USB_GADGET)        += gadget/
 
 obj-$(CONFIG_USB_COMMON)        += usb-common.o
diff --git a/drivers/usb/c67x00/c67x00-drv.c b/drivers/usb/c67x00/c67x00-drv.c
index 57ae44cd0b8..6f3b6e26739 100644
--- a/drivers/usb/c67x00/c67x00-drv.c
+++ b/drivers/usb/c67x00/c67x00-drv.c
@@ -225,21 +225,10 @@ static struct platform_driver c67x00_driver = {
                 .name = "c67x00",
         },
 };
-MODULE_ALIAS("platform:c67x00");
-
-static int __init c67x00_init(void)
-{
-        return platform_driver_register(&c67x00_driver);
-}
 
-static void __exit c67x00_exit(void)
-{
-        platform_driver_unregister(&c67x00_driver);
-}
-
-module_init(c67x00_init);
-module_exit(c67x00_exit);
+module_platform_driver(c67x00_driver);
 
 MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely");
 MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:c67x00");
diff --git a/drivers/usb/c67x00/c67x00-hcd.c b/drivers/usb/c67x00/c67x00-hcd.c
index d3e1356d091..75e47b860a5 100644
--- a/drivers/usb/c67x00/c67x00-hcd.c
+++ b/drivers/usb/c67x00/c67x00-hcd.c
@@ -271,7 +271,6 @@ static void c67x00_hcd_irq(struct c67x00_sie *sie, u16 int_status, u16 msg)
         if (int_status & SOFEOP_FLG(sie->sie_num)) {
                 c67x00_ll_usb_clear_status(sie, SOF_EOP_IRQ_FLG);
                 c67x00_sched_kick(c67x00);
-                set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
         }
 }
 
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index a8078d0638f..9543b19d410 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -58,12 +58,62 @@ static struct usb_driver acm_driver;
 static struct tty_driver *acm_tty_driver;
 static struct acm *acm_table[ACM_TTY_MINORS];
 
-static DEFINE_MUTEX(open_mutex);
+static DEFINE_MUTEX(acm_table_lock);
 
-#define ACM_READY(acm)  (acm && acm->dev && acm->port.count)
+/*
+ * acm_table accessors
+ */
 
-static const struct tty_port_operations acm_port_ops = {
-};
+/*
+ * Look up an ACM structure by index. If found and not disconnected, increment
+ * its refcount and return it with its mutex held.
+ */
+static struct acm *acm_get_by_index(unsigned index)
+{
+        struct acm *acm;
+
+        mutex_lock(&acm_table_lock);
+        acm = acm_table[index];
+        if (acm) {
+                mutex_lock(&acm->mutex);
+                if (acm->disconnected) {
+                        mutex_unlock(&acm->mutex);
+                        acm = NULL;
+                } else {
+                        tty_port_get(&acm->port);
+                        mutex_unlock(&acm->mutex);
+                }
+        }
+        mutex_unlock(&acm_table_lock);
+        return acm;
+}
+
+/*
+ * Try to find an available minor number and if found, associate it with 'acm'.
+ */
+static int acm_alloc_minor(struct acm *acm)
+{
+        int minor;
+
+        mutex_lock(&acm_table_lock);
+        for (minor = 0; minor < ACM_TTY_MINORS; minor++) {
+                if (!acm_table[minor]) {
+                        acm_table[minor] = acm;
+                        break;
+                }
+        }
+        mutex_unlock(&acm_table_lock);
+
+        return minor;
+}
+
+/* Release the minor number associated with 'acm'.  */
+static void acm_release_minor(struct acm *acm)
+{
+        mutex_lock(&acm_table_lock);
+        acm_table[acm->minor] = NULL;
+        mutex_unlock(&acm_table_lock);
+}
 
 /*
  * Functions for ACM control messages.
@@ -267,9 +317,6 @@ static void acm_ctrl_irq(struct urb *urb)
                 goto exit;
         }
 
-        if (!ACM_READY(acm))
-                goto exit;
-
         usb_mark_last_busy(acm->dev);
 
         data = (unsigned char *)(dr + 1);
@@ -429,8 +476,7 @@ static void acm_write_bulk(struct urb *urb)
         spin_lock_irqsave(&acm->write_lock, flags);
         acm_write_done(acm, wb);
         spin_unlock_irqrestore(&acm->write_lock, flags);
-        if (ACM_READY(acm))
-                schedule_work(&acm->work);
+        schedule_work(&acm->work);
 }
 
 static void acm_softint(struct work_struct *work)
@@ -440,8 +486,6 @@ static void acm_softint(struct work_struct *work)
 
         dev_vdbg(&acm->data->dev, "%s\n", __func__);
 
-        if (!ACM_READY(acm))
-                return;
         tty = tty_port_tty_get(&acm->port);
         if (!tty)
                 return;
@@ -453,93 +497,122 @@ static void acm_softint(struct work_struct *work)
  * TTY handlers
  */
 
-static int acm_tty_open(struct tty_struct *tty, struct file *filp)
+static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
 {
         struct acm *acm;
-        int rv = -ENODEV;
-
-        mutex_lock(&open_mutex);
+        int retval;
 
-        acm = acm_table[tty->index];
-        if (!acm || !acm->dev)
-                goto out;
-        else
-                rv = 0;
+        dev_dbg(tty->dev, "%s\n", __func__);
 
-        dev_dbg(&acm->control->dev, "%s\n", __func__);
+        acm = acm_get_by_index(tty->index);
+        if (!acm)
+                return -ENODEV;
 
-        set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+        retval = tty_init_termios(tty);
+        if (retval)
+                goto error_init_termios;
 
         tty->driver_data = acm;
-        tty_port_tty_set(&acm->port, tty);
 
-        if (usb_autopm_get_interface(acm->control) < 0)
-                goto early_bail;
-        else
-                acm->control->needs_remote_wakeup = 1;
+        /* Final install (we use the default method) */
+        tty_driver_kref_get(driver);
+        tty->count++;
+        driver->ttys[tty->index] = tty;
+
+        return 0;
+
+error_init_termios:
+        tty_port_put(&acm->port);
+        return retval;
+}
+
+static int acm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+        struct acm *acm = tty->driver_data;
+
+        dev_dbg(tty->dev, "%s\n", __func__);
+
+        return tty_port_open(&acm->port, tty, filp);
+}
+
+static int acm_port_activate(struct tty_port *port, struct tty_struct *tty)
+{
+        struct acm *acm = container_of(port, struct acm, port);
+        int retval = -ENODEV;
+
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
 
         mutex_lock(&acm->mutex);
-        if (acm->port.count++) {
-                mutex_unlock(&acm->mutex);
-                usb_autopm_put_interface(acm->control);
-                goto out;
-        }
+        if (acm->disconnected)
+                goto disconnected;
+
+        retval = usb_autopm_get_interface(acm->control);
+        if (retval)
+                goto error_get_interface;
+
+        /*
+         * FIXME: Why do we need this? Allocating 64K of physically contiguous
+         * memory is really nasty...
+         */
+        set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
+        acm->control->needs_remote_wakeup = 1;
 
         acm->ctrlurb->dev = acm->dev;
         if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
                 dev_err(&acm->control->dev,
                         "%s - usb_submit_urb(ctrl irq) failed\n", __func__);
-                goto bail_out;
+                goto error_submit_urb;
         }
 
-        if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
+        acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS;
+        if (acm_set_control(acm, acm->ctrlout) < 0 &&
             (acm->ctrl_caps & USB_CDC_CAP_LINE))
-                goto bail_out;
+                goto error_set_control;
 
         usb_autopm_put_interface(acm->control);
 
         if (acm_submit_read_urbs(acm, GFP_KERNEL))
-                goto bail_out;
-
-        set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
-        rv = tty_port_block_til_ready(&acm->port, tty, filp);
+                goto error_submit_read_urbs;
 
         mutex_unlock(&acm->mutex);
-out:
-        mutex_unlock(&open_mutex);
-        return rv;
 
-bail_out:
-        acm->port.count--;
-        mutex_unlock(&acm->mutex);
+        return 0;
+
+error_submit_read_urbs:
+        acm->ctrlout = 0;
+        acm_set_control(acm, acm->ctrlout);
+error_set_control:
+        usb_kill_urb(acm->ctrlurb);
+error_submit_urb:
         usb_autopm_put_interface(acm->control);
-early_bail:
-        mutex_unlock(&open_mutex);
-        tty_port_tty_set(&acm->port, NULL);
-        return -EIO;
+error_get_interface:
+disconnected:
+        mutex_unlock(&acm->mutex);
+        return retval;
 }
 
-static void acm_tty_unregister(struct acm *acm)
+static void acm_port_destruct(struct tty_port *port)
 {
-        int i;
+        struct acm *acm = container_of(port, struct acm, port);
+
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
 
         tty_unregister_device(acm_tty_driver, acm->minor);
+        acm_release_minor(acm);
         usb_put_intf(acm->control);
-        acm_table[acm->minor] = NULL;
-        usb_free_urb(acm->ctrlurb);
-        for (i = 0; i < ACM_NW; i++)
-                usb_free_urb(acm->wb[i].urb);
-        for (i = 0; i < acm->rx_buflimit; i++)
-                usb_free_urb(acm->read_urbs[i]);
         kfree(acm->country_codes);
         kfree(acm);
 }
 
-static void acm_port_down(struct acm *acm)
+static void acm_port_shutdown(struct tty_port *port)
 {
+        struct acm *acm = container_of(port, struct acm, port);
         int i;
 
-        if (acm->dev) {
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
+
+        mutex_lock(&acm->mutex);
+        if (!acm->disconnected) {
                 usb_autopm_get_interface(acm->control);
                 acm_set_control(acm, acm->ctrlout = 0);
                 usb_kill_urb(acm->ctrlurb);
@@ -550,40 +623,28 @@ static void acm_port_down(struct acm *acm)
                 acm->control->needs_remote_wakeup = 0;
                 usb_autopm_put_interface(acm->control);
         }
+        mutex_unlock(&acm->mutex);
+}
+
+static void acm_tty_cleanup(struct tty_struct *tty)
+{
+        struct acm *acm = tty->driver_data;
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
+        tty_port_put(&acm->port);
 }
 
 static void acm_tty_hangup(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
         tty_port_hangup(&acm->port);
-        mutex_lock(&open_mutex);
-        acm_port_down(acm);
-        mutex_unlock(&open_mutex);
 }
 
 static void acm_tty_close(struct tty_struct *tty, struct file *filp)
 {
         struct acm *acm = tty->driver_data;
-
-        /* Perform the closing process and see if we need to do the hardware
-           shutdown */
-        if (!acm)
-                return;
-
-        mutex_lock(&open_mutex);
-        if (tty_port_close_start(&acm->port, tty, filp) == 0) {
-                if (!acm->dev) {
-                        tty_port_tty_set(&acm->port, NULL);
-                        acm_tty_unregister(acm);
-                        tty->driver_data = NULL;
-                }
-                mutex_unlock(&open_mutex);
-                return;
-        }
-        acm_port_down(acm);
-        tty_port_close_end(&acm->port, tty);
-        tty_port_tty_set(&acm->port, NULL);
-        mutex_unlock(&open_mutex);
+        dev_dbg(&acm->control->dev, "%s\n", __func__);
+        tty_port_close(&acm->port, tty, filp);
 }
 
 static int acm_tty_write(struct tty_struct *tty,
@@ -595,8 +656,6 @@ static int acm_tty_write(struct tty_struct *tty,
         int wbn;
         struct acm_wb *wb;
 
-        if (!ACM_READY(acm))
-                return -EINVAL;
         if (!count)
                 return 0;
 
@@ -625,8 +684,6 @@ static int acm_tty_write(struct tty_struct *tty,
 static int acm_tty_write_room(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
-        if (!ACM_READY(acm))
-                return -EINVAL;
         /*
          * Do not let the line discipline to know that we have a reserve,
          * or it might get too enthusiastic.
@@ -637,7 +694,11 @@ static int acm_tty_write_room(struct tty_struct *tty)
 static int acm_tty_chars_in_buffer(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
-        if (!ACM_READY(acm))
+        /*
+         * if the device was unplugged then any remaining characters fell out
+         * of the connector ;)
+         */
+        if (acm->disconnected)
                 return 0;
         /*
          * This is inaccurate (overcounts), but it works.
@@ -649,9 +710,6 @@ static void acm_tty_throttle(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
 
-        if (!ACM_READY(acm))
-                return;
-
         spin_lock_irq(&acm->read_lock);
         acm->throttle_req = 1;
         spin_unlock_irq(&acm->read_lock);
@@ -662,9 +720,6 @@ static void acm_tty_unthrottle(struct tty_struct *tty)
         struct acm *acm = tty->driver_data;
         unsigned int was_throttled;
 
-        if (!ACM_READY(acm))
-                return;
-
         spin_lock_irq(&acm->read_lock);
         was_throttled = acm->throttled;
         acm->throttled = 0;
@@ -679,8 +734,7 @@ static int acm_tty_break_ctl(struct tty_struct *tty, int state)
 {
         struct acm *acm = tty->driver_data;
         int retval;
-        if (!ACM_READY(acm))
-                return -EINVAL;
+
         retval = acm_send_break(acm, state ? 0xffff : 0);
         if (retval < 0)
                 dev_dbg(&acm->control->dev, "%s - send break failed\n",
@@ -692,9 +746,6 @@ static int acm_tty_tiocmget(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
 
-        if (!ACM_READY(acm))
-                return -EINVAL;
-
         return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) |
                (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) |
                (acm->ctrlin  & ACM_CTRL_DSR ? TIOCM_DSR : 0) |
@@ -709,9 +760,6 @@ static int acm_tty_tiocmset(struct tty_struct *tty,
         struct acm *acm = tty->driver_data;
         unsigned int newctrl;
 
-        if (!ACM_READY(acm))
-                return -EINVAL;
-
         newctrl = acm->ctrlout;
         set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) |
                                         (set & TIOCM_RTS ? ACM_CTRL_RTS : 0);
@@ -728,11 +776,6 @@ static int acm_tty_tiocmset(struct tty_struct *tty,
 static int acm_tty_ioctl(struct tty_struct *tty,
                                         unsigned int cmd, unsigned long arg)
 {
-        struct acm *acm = tty->driver_data;
-
-        if (!ACM_READY(acm))
-                return -EINVAL;
-
         return -ENOIOCTLCMD;
 }
 
@@ -756,9 +799,6 @@ static void acm_tty_set_termios(struct tty_struct *tty,
         struct usb_cdc_line_coding newline;
         int newctrl = acm->ctrlout;
 
-        if (!ACM_READY(acm))
-                return;
-
         newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty));
         newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0;
         newline.bParityType = termios->c_cflag & PARENB ?
@@ -788,6 +828,12 @@ static void acm_tty_set_termios(struct tty_struct *tty,
         }
 }
 
+static const struct tty_port_operations acm_port_ops = {
+        .shutdown = acm_port_shutdown,
+        .activate = acm_port_activate,
+        .destruct = acm_port_destruct,
+};
+
 /*
  * USB probe and disconnect routines.
  */
@@ -1047,12 +1093,6 @@ skip_normal_probe:
         }
 made_compressed_probe:
         dev_dbg(&intf->dev, "interfaces are valid\n");
-        for (minor = 0; minor < ACM_TTY_MINORS && acm_table[minor]; minor++);
-
-        if (minor == ACM_TTY_MINORS) {
-                dev_err(&intf->dev, "no more free acm devices\n");
-                return -ENODEV;
-        }
 
         acm = kzalloc(sizeof(struct acm), GFP_KERNEL);
         if (acm == NULL) {
@@ -1060,6 +1100,13 @@ made_compressed_probe:
                 goto alloc_fail;
         }
 
+        minor = acm_alloc_minor(acm);
+        if (minor == ACM_TTY_MINORS) {
+                dev_err(&intf->dev, "no more free acm devices\n");
+                kfree(acm);
+                return -ENODEV;
+        }
+
         ctrlsize = usb_endpoint_maxp(epctrl);
         readsize = usb_endpoint_maxp(epread) *
                                 (quirks == SINGLE_RX_URB ? 1 : 2);
@@ -1183,6 +1230,8 @@ made_compressed_probe:
                 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes);
                 if (i < 0) {
                         kfree(acm->country_codes);
+                        acm->country_codes = NULL;
+                        acm->country_code_size = 0;
                         goto skip_countries;
                 }
 
@@ -1191,6 +1240,8 @@ made_compressed_probe:
                 if (i < 0) {
                         device_remove_file(&intf->dev, &dev_attr_wCountryCodes);
                         kfree(acm->country_codes);
+                        acm->country_codes = NULL;
+                        acm->country_code_size = 0;
                         goto skip_countries;
                 }
         }
@@ -1218,8 +1269,6 @@ skip_countries:
         usb_get_intf(control_interface);
         tty_register_device(acm_tty_driver, minor, &control_interface->dev);
 
-        acm_table[minor] = acm;
-
         return 0;
 alloc_fail7:
         for (i = 0; i < ACM_NW; i++)
@@ -1234,6 +1283,7 @@ alloc_fail5:
 alloc_fail4:
         usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
 alloc_fail2:
+        acm_release_minor(acm);
         kfree(acm);
 alloc_fail:
         return -ENOMEM;
@@ -1259,12 +1309,16 @@ static void acm_disconnect(struct usb_interface *intf)
         struct acm *acm = usb_get_intfdata(intf);
         struct usb_device *usb_dev = interface_to_usbdev(intf);
         struct tty_struct *tty;
+        int i;
+
+        dev_dbg(&intf->dev, "%s\n", __func__);
 
         /* sibling interface is already cleaning up */
         if (!acm)
                 return;
 
-        mutex_lock(&open_mutex);
+        mutex_lock(&acm->mutex);
+        acm->disconnected = true;
         if (acm->country_codes) {
                 device_remove_file(&acm->control->dev,
                                 &dev_attr_wCountryCodes);
@@ -1272,33 +1326,32 @@ static void acm_disconnect(struct usb_interface *intf)
                                 &dev_attr_iCountryCodeRelDate);
         }
         device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities);
-        acm->dev = NULL;
         usb_set_intfdata(acm->control, NULL);
         usb_set_intfdata(acm->data, NULL);
+        mutex_unlock(&acm->mutex);
+
+        tty = tty_port_tty_get(&acm->port);
+        if (tty) {
+                tty_vhangup(tty);
+                tty_kref_put(tty);
+        }
 
         stop_data_traffic(acm);
 
+        usb_free_urb(acm->ctrlurb);
+        for (i = 0; i < ACM_NW; i++)
+                usb_free_urb(acm->wb[i].urb);
+        for (i = 0; i < acm->rx_buflimit; i++)
+                usb_free_urb(acm->read_urbs[i]);
         acm_write_buffers_free(acm);
-        usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer,
-                          acm->ctrl_dma);
+        usb_free_coherent(usb_dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma);
         acm_read_buffers_free(acm);
 
         if (!acm->combined_interfaces)
                 usb_driver_release_interface(&acm_driver, intf == acm->control ?
                                         acm->data : acm->control);
 
-        if (acm->port.count == 0) {
-                acm_tty_unregister(acm);
-                mutex_unlock(&open_mutex);
-                return;
-        }
-
-        mutex_unlock(&open_mutex);
-        tty = tty_port_tty_get(&acm->port);
-        if (tty) {
-                tty_hangup(tty);
-                tty_kref_put(tty);
-        }
+        tty_port_put(&acm->port);
 }
 
 #ifdef CONFIG_PM
@@ -1325,16 +1378,10 @@ static int acm_suspend(struct usb_interface *intf, pm_message_t message)
 
         if (cnt)
                 return 0;
-        /*
-        we treat opened interfaces differently,
-        we must guard against open
-        */
-        mutex_lock(&acm->mutex);
 
-        if (acm->port.count)
+        if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags))
                 stop_data_traffic(acm);
 
-        mutex_unlock(&acm->mutex);
         return 0;
 }
 
@@ -1353,8 +1400,7 @@ static int acm_resume(struct usb_interface *intf)
         if (cnt)
                 return 0;
 
-        mutex_lock(&acm->mutex);
-        if (acm->port.count) {
+        if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
                 rv = usb_submit_urb(acm->ctrlurb, GFP_NOIO);
 
                 spin_lock_irq(&acm->write_lock);
@@ -1378,7 +1424,6 @@ static int acm_resume(struct usb_interface *intf)
         }
 
 err_out:
-        mutex_unlock(&acm->mutex);
         return rv;
 }
 
@@ -1387,15 +1432,14 @@ static int acm_reset_resume(struct usb_interface *intf)
         struct acm *acm = usb_get_intfdata(intf);
         struct tty_struct *tty;
 
-        mutex_lock(&acm->mutex);
-        if (acm->port.count) {
+        if (test_bit(ASYNCB_INITIALIZED, &acm->port.flags)) {
                 tty = tty_port_tty_get(&acm->port);
                 if (tty) {
                         tty_hangup(tty);
                         tty_kref_put(tty);
                 }
         }
-        mutex_unlock(&acm->mutex);
+
         return acm_resume(intf);
 }
 
@@ -1604,8 +1648,10 @@ static struct usb_driver acm_driver = {
  */
 
 static const struct tty_operations acm_ops = {
+        .install =              acm_tty_install,
         .open =                 acm_tty_open,
         .close =                acm_tty_close,
+        .cleanup =              acm_tty_cleanup,
         .hangup =               acm_tty_hangup,
         .write =                acm_tty_write,
         .write_room =           acm_tty_write_room,
diff --git a/drivers/usb/class/cdc-acm.h b/drivers/usb/class/cdc-acm.h
index ca7937f26e2..35ef887b741 100644
--- a/drivers/usb/class/cdc-acm.h
+++ b/drivers/usb/class/cdc-acm.h
@@ -101,6 +101,7 @@ struct acm {
         int transmitting;
         spinlock_t write_lock;
         struct mutex mutex;
+        bool disconnected;
         struct usb_cdc_line_coding line;                /* bits, stop, parity */
         struct work_struct work;                        /* work queue entry for line discipline waking up */
         unsigned int ctrlin;                            /* input control lines (DCD, DSR, RI, break, overruns) */
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index e3beaf229ee..3af5e2dd1d8 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -86,6 +86,7 @@ struct async {
         void __user *userbuffer;
         void __user *userurb;
         struct urb *urb;
+        unsigned int mem_usage;
         int status;
         u32 secid;
         u8 bulk_addr;
@@ -108,8 +109,44 @@ enum snoop_when {
 
 #define USB_DEVICE_DEV          MKDEV(USB_DEVICE_MAJOR, 0)
 
-#define MAX_USBFS_BUFFER_SIZE   16384
+/* Limit on the total amount of memory we can allocate for transfers */
+static unsigned usbfs_memory_mb = 16;
+module_param(usbfs_memory_mb, uint, 0644);
+MODULE_PARM_DESC(usbfs_memory_mb,
+                "maximum MB allowed for usbfs buffers (0 = no limit)");
 
+/* Hard limit, necessary to avoid aithmetic overflow */
+#define USBFS_XFER_MAX          (UINT_MAX / 2 - 1000000)
+
+static atomic_t usbfs_memory_usage;     /* Total memory currently allocated */
+
+/* Check whether it's okay to allocate more memory for a transfer */
+static int usbfs_increase_memory_usage(unsigned amount)
+{
+        unsigned lim;
+
+        /*
+         * Convert usbfs_memory_mb to bytes, avoiding overflows.
+         * 0 means use the hard limit (effectively unlimited).
+         */
+        lim = ACCESS_ONCE(usbfs_memory_mb);
+        if (lim == 0 || lim > (USBFS_XFER_MAX >> 20))
+                lim = USBFS_XFER_MAX;
+        else
+                lim <<= 20;
+
+        atomic_add(amount, &usbfs_memory_usage);
+        if (atomic_read(&usbfs_memory_usage) <= lim)
+                return 0;
+        atomic_sub(amount, &usbfs_memory_usage);
+        return -ENOMEM;
+}
+
+/* Memory for a transfer is being deallocated */
+static void usbfs_decrease_memory_usage(unsigned amount)
+{
+        atomic_sub(amount, &usbfs_memory_usage);
+}
 
 static int connected(struct dev_state *ps)
 {
@@ -249,10 +286,12 @@ static struct async *alloc_async(unsigned int numisoframes)
 static void free_async(struct async *as)
 {
         put_pid(as->pid);
-        put_cred(as->cred);
+        if (as->cred)
+                put_cred(as->cred);
         kfree(as->urb->transfer_buffer);
         kfree(as->urb->setup_packet);
         usb_free_urb(as->urb);
+        usbfs_decrease_memory_usage(as->mem_usage);
         kfree(as);
 }
 
@@ -792,9 +831,15 @@ static int proc_control(struct dev_state *ps, void __user *arg)
         wLength = ctrl.wLength;         /* To suppress 64k PAGE_SIZE warning */
         if (wLength > PAGE_SIZE)
                 return -EINVAL;
+        ret = usbfs_increase_memory_usage(PAGE_SIZE + sizeof(struct urb) +
+                        sizeof(struct usb_ctrlrequest));
+        if (ret)
+                return ret;
         tbuf = (unsigned char *)__get_free_page(GFP_KERNEL);
-        if (!tbuf)
-                return -ENOMEM;
+        if (!tbuf) {
+                ret = -ENOMEM;
+                goto done;
+        }
         tmo = ctrl.timeout;
         snoop(&dev->dev, "control urb: bRequestType=%02x "
                 "bRequest=%02x wValue=%04x "
@@ -806,8 +851,8 @@ static int proc_control(struct dev_state *ps, void __user *arg)
         if (ctrl.bRequestType & 0x80) {
                 if (ctrl.wLength && !access_ok(VERIFY_WRITE, ctrl.data,
                                                ctrl.wLength)) {
-                        free_page((unsigned long)tbuf);
-                        return -EINVAL;
+                        ret = -EINVAL;
+                        goto done;
                 }
                 pipe = usb_rcvctrlpipe(dev, 0);
                 snoop_urb(dev, NULL, pipe, ctrl.wLength, tmo, SUBMIT, NULL, 0);
@@ -821,15 +866,15 @@ static int proc_control(struct dev_state *ps, void __user *arg)
                           tbuf, max(i, 0));
                 if ((i > 0) && ctrl.wLength) {
                         if (copy_to_user(ctrl.data, tbuf, i)) {
-                                free_page((unsigned long)tbuf);
-                                return -EFAULT;
+                                ret = -EFAULT;
+                                goto done;
                         }
                 }
         } else {
                 if (ctrl.wLength) {
                         if (copy_from_user(tbuf, ctrl.data, ctrl.wLength)) {
-                                free_page((unsigned long)tbuf);
-                                return -EFAULT;
+                                ret = -EFAULT;
+                                goto done;
                         }
                 }
                 pipe = usb_sndctrlpipe(dev, 0);
@@ -843,14 +888,18 @@ static int proc_control(struct dev_state *ps, void __user *arg)
                 usb_lock_device(dev);
                 snoop_urb(dev, NULL, pipe, max(i, 0), min(i, 0), COMPLETE, NULL, 0);
         }
-        free_page((unsigned long)tbuf);
         if (i < 0 && i != -EPIPE) {
                 dev_printk(KERN_DEBUG, &dev->dev, "usbfs: USBDEVFS_CONTROL "
                            "failed cmd %s rqt %u rq %u len %u ret %d\n",
                            current->comm, ctrl.bRequestType, ctrl.bRequest,
                            ctrl.wLength, i);
         }
-        return i;
+        ret = i;
+ done:
+        free_page((unsigned long) tbuf);
+        usbfs_decrease_memory_usage(PAGE_SIZE + sizeof(struct urb) +
+                        sizeof(struct usb_ctrlrequest));
+        return ret;
 }
 
 static int proc_bulk(struct dev_state *ps, void __user *arg)
@@ -877,15 +926,20 @@ static int proc_bulk(struct dev_state *ps, void __user *arg)
         if (!usb_maxpacket(dev, pipe, !(bulk.ep & USB_DIR_IN)))
                 return -EINVAL;
         len1 = bulk.len;
-        if (len1 > MAX_USBFS_BUFFER_SIZE)
+        if (len1 >= USBFS_XFER_MAX)
                 return -EINVAL;
-        if (!(tbuf = kmalloc(len1, GFP_KERNEL)))
-                return -ENOMEM;
+        ret = usbfs_increase_memory_usage(len1 + sizeof(struct urb));
+        if (ret)
+                return ret;
+        if (!(tbuf = kmalloc(len1, GFP_KERNEL))) {
+                ret = -ENOMEM;
+                goto done;
+        }
         tmo = bulk.timeout;
         if (bulk.ep & 0x80) {
                 if (len1 && !access_ok(VERIFY_WRITE, bulk.data, len1)) {
-                        kfree(tbuf);
-                        return -EINVAL;
+                        ret = -EINVAL;
+                        goto done;
                 }
                 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, NULL, 0);
 
@@ -896,15 +950,15 @@ static int proc_bulk(struct dev_state *ps, void __user *arg)
 
                 if (!i && len2) {
                         if (copy_to_user(bulk.data, tbuf, len2)) {
-                                kfree(tbuf);
-                                return -EFAULT;
+                                ret = -EFAULT;
+                                goto done;
                         }
                 }
         } else {
                 if (len1) {
                         if (copy_from_user(tbuf, bulk.data, len1)) {
-                                kfree(tbuf);
-                                return -EFAULT;
+                                ret = -EFAULT;
+                                goto done;
                         }
                 }
                 snoop_urb(dev, NULL, pipe, len1, tmo, SUBMIT, tbuf, len1);
@@ -914,10 +968,11 @@ static int proc_bulk(struct dev_state *ps, void __user *arg)
                 usb_lock_device(dev);
                 snoop_urb(dev, NULL, pipe, len2, i, COMPLETE, NULL, 0);
         }
+        ret = (i < 0 ? i : len2);
+ done:
         kfree(tbuf);
-        if (i < 0)
-                return i;
-        return len2;
+        usbfs_decrease_memory_usage(len1 + sizeof(struct urb));
+        return ret;
 }
 
 static int proc_resetep(struct dev_state *ps, void __user *arg)
@@ -1062,7 +1117,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
 {
         struct usbdevfs_iso_packet_desc *isopkt = NULL;
         struct usb_host_endpoint *ep;
-        struct async *as;
+        struct async *as = NULL;
         struct usb_ctrlrequest *dr = NULL;
         unsigned int u, totlen, isofrmlen;
         int ret, ifnum = -1;
@@ -1095,32 +1150,30 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
         }
         if (!ep)
                 return -ENOENT;
+
+        u = 0;
         switch(uurb->type) {
         case USBDEVFS_URB_TYPE_CONTROL:
                 if (!usb_endpoint_xfer_control(&ep->desc))
                         return -EINVAL;
-                /* min 8 byte setup packet,
-                 * max 8 byte setup plus an arbitrary data stage */
-                if (uurb->buffer_length < 8 ||
-                    uurb->buffer_length > (8 + MAX_USBFS_BUFFER_SIZE))
+                /* min 8 byte setup packet */
+                if (uurb->buffer_length < 8)
                         return -EINVAL;
                 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
                 if (!dr)
                         return -ENOMEM;
                 if (copy_from_user(dr, uurb->buffer, 8)) {
-                        kfree(dr);
-                        return -EFAULT;
+                        ret = -EFAULT;
+                        goto error;
                 }
                 if (uurb->buffer_length < (le16_to_cpup(&dr->wLength) + 8)) {
-                        kfree(dr);
-                        return -EINVAL;
+                        ret = -EINVAL;
+                        goto error;
                 }
                 ret = check_ctrlrecip(ps, dr->bRequestType, dr->bRequest,
                                       le16_to_cpup(&dr->wIndex));
-                if (ret) {
-                        kfree(dr);
-                        return ret;
-                }
+                if (ret)
+                        goto error;
                 uurb->number_of_packets = 0;
                 uurb->buffer_length = le16_to_cpup(&dr->wLength);
                 uurb->buffer += 8;
@@ -1138,6 +1191,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                         __le16_to_cpup(&dr->wValue),
                         __le16_to_cpup(&dr->wIndex),
                         __le16_to_cpup(&dr->wLength));
+                u = sizeof(struct usb_ctrlrequest);
                 break;
 
         case USBDEVFS_URB_TYPE_BULK:
@@ -1151,8 +1205,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                         goto interrupt_urb;
                 }
                 uurb->number_of_packets = 0;
-                if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
-                        return -EINVAL;
                 break;
 
         case USBDEVFS_URB_TYPE_INTERRUPT:
@@ -1160,8 +1212,6 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                         return -EINVAL;
  interrupt_urb:
                 uurb->number_of_packets = 0;
-                if (uurb->buffer_length > MAX_USBFS_BUFFER_SIZE)
-                        return -EINVAL;
                 break;
 
         case USBDEVFS_URB_TYPE_ISO:
@@ -1176,50 +1226,53 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                 if (!(isopkt = kmalloc(isofrmlen, GFP_KERNEL)))
                         return -ENOMEM;
                 if (copy_from_user(isopkt, iso_frame_desc, isofrmlen)) {
-                        kfree(isopkt);
-                        return -EFAULT;
+                        ret = -EFAULT;
+                        goto error;
                 }
                 for (totlen = u = 0; u < uurb->number_of_packets; u++) {
                         /* arbitrary limit,
                          * sufficient for USB 2.0 high-bandwidth iso */
                         if (isopkt[u].length > 8192) {
-                                kfree(isopkt);
-                                return -EINVAL;
+                                ret = -EINVAL;
+                                goto error;
                         }
                         totlen += isopkt[u].length;
                 }
-                /* 3072 * 64 microframes */
-                if (totlen > 196608) {
-                        kfree(isopkt);
-                        return -EINVAL;
-                }
+                u *= sizeof(struct usb_iso_packet_descriptor);
                 uurb->buffer_length = totlen;
                 break;
 
         default:
                 return -EINVAL;
         }
+
+        if (uurb->buffer_length >= USBFS_XFER_MAX) {
+                ret = -EINVAL;
+                goto error;
+        }
         if (uurb->buffer_length > 0 &&
                         !access_ok(is_in ? VERIFY_WRITE : VERIFY_READ,
                                 uurb->buffer, uurb->buffer_length)) {
-                kfree(isopkt);
-                kfree(dr);
-                return -EFAULT;
+                ret = -EFAULT;
+                goto error;
         }
         as = alloc_async(uurb->number_of_packets);
         if (!as) {
-                kfree(isopkt);
-                kfree(dr);
-                return -ENOMEM;
+                ret = -ENOMEM;
+                goto error;
         }
+        u += sizeof(struct async) + sizeof(struct urb) + uurb->buffer_length;
+        ret = usbfs_increase_memory_usage(u);
+        if (ret)
+                goto error;
+        as->mem_usage = u;
+
         if (uurb->buffer_length > 0) {
                 as->urb->transfer_buffer = kmalloc(uurb->buffer_length,
                                 GFP_KERNEL);
                 if (!as->urb->transfer_buffer) {
-                        kfree(isopkt);
-                        kfree(dr);
-                        free_async(as);
-                        return -ENOMEM;
+                        ret = -ENOMEM;
+                        goto error;
                 }
                 /* Isochronous input data may end up being discontiguous
                  * if some of the packets are short.  Clear the buffer so
@@ -1253,6 +1306,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
 
         as->urb->transfer_buffer_length = uurb->buffer_length;
         as->urb->setup_packet = (unsigned char *)dr;
+        dr = NULL;
         as->urb->start_frame = uurb->start_frame;
         as->urb->number_of_packets = uurb->number_of_packets;
         if (uurb->type == USBDEVFS_URB_TYPE_ISO ||
@@ -1268,6 +1322,7 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                 totlen += isopkt[u].length;
         }
         kfree(isopkt);
+        isopkt = NULL;
         as->ps = ps;
         as->userurb = arg;
         if (is_in && uurb->buffer_length > 0)
@@ -1282,8 +1337,8 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
         if (!is_in && uurb->buffer_length > 0) {
                 if (copy_from_user(as->urb->transfer_buffer, uurb->buffer,
                                 uurb->buffer_length)) {
-                        free_async(as);
-                        return -EFAULT;
+                        ret = -EFAULT;
+                        goto error;
                 }
         }
         snoop_urb(ps->dev, as->userurb, as->urb->pipe,
@@ -1329,10 +1384,16 @@ static int proc_do_submiturb(struct dev_state *ps, struct usbdevfs_urb *uurb,
                 snoop_urb(ps->dev, as->userurb, as->urb->pipe,
                                 0, ret, COMPLETE, NULL, 0);
                 async_removepending(as);
-                free_async(as);
-                return ret;
+                goto error;
         }
         return 0;
+
+ error:
+        kfree(isopkt);
+        kfree(dr);
+        if (as)
+                free_async(as);
+        return ret;
 }
 
 static int proc_submiturb(struct dev_state *ps, void __user *arg)
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index 45887a0ff87..d40ff956881 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -45,10 +45,12 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids,
         struct usb_dynid *dynid;
         u32 idVendor = 0;
         u32 idProduct = 0;
+        unsigned int bInterfaceClass = 0;
         int fields = 0;
         int retval = 0;
 
-        fields = sscanf(buf, "%x %x", &idVendor, &idProduct);
+        fields = sscanf(buf, "%x %x %x", &idVendor, &idProduct,
+                                        &bInterfaceClass);
         if (fields < 2)
                 return -EINVAL;
 
@@ -60,6 +62,10 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids,
         dynid->id.idVendor = idVendor;
         dynid->id.idProduct = idProduct;
         dynid->id.match_flags = USB_DEVICE_ID_MATCH_DEVICE;
+        if (fields == 3) {
+                dynid->id.bInterfaceClass = (u8)bInterfaceClass;
+                dynid->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS;
+        }
 
         spin_lock(&dynids->lock);
         list_add_tail(&dynid->node, &dynids->list);
@@ -1073,17 +1079,10 @@ static int usb_suspend_interface(struct usb_device *udev,
                 goto done;
         driver = to_usb_driver(intf->dev.driver);
 
-        if (driver->suspend) {
-                status = driver->suspend(intf, msg);
-                if (status && !PMSG_IS_AUTO(msg))
-                        dev_err(&intf->dev, "%s error %d\n",
-                                        "suspend", status);
-        } else {
-                /* Later we will unbind the driver and reprobe */
-                intf->needs_binding = 1;
-                dev_warn(&intf->dev, "no %s for driver %s?\n",
-                                "suspend", driver->name);
-        }
+        /* at this time we know the driver supports suspend */
+        status = driver->suspend(intf, msg);
+        if (status && !PMSG_IS_AUTO(msg))
+                dev_err(&intf->dev, "suspend error %d\n", status);
 
  done:
         dev_vdbg(&intf->dev, "%s: status %d\n", __func__, status);
@@ -1132,16 +1131,9 @@ static int usb_resume_interface(struct usb_device *udev,
                                         "reset_resume", driver->name);
                 }
         } else {
-                if (driver->resume) {
-                        status = driver->resume(intf);
-                        if (status)
-                                dev_err(&intf->dev, "%s error %d\n",
-                                                "resume", status);
-                } else {
-                        intf->needs_binding = 1;
-                        dev_warn(&intf->dev, "no %s for driver %s?\n",
-                                        "resume", driver->name);
-                }
+                status = driver->resume(intf);
+                if (status)
+                        dev_err(&intf->dev, "resume error %d\n", status);
         }
 
 done:
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index a004db35f6d..d136b8f4c8a 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -453,10 +453,6 @@ static int resume_common(struct device *dev, int event)
 
         pci_set_master(pci_dev);
 
-        clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
-        if (hcd->shared_hcd)
-                clear_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
-
         if (hcd->driver->pci_resume && !HCD_DEAD(hcd)) {
                 if (event != PM_EVENT_AUTO_RESUME)
                         wait_for_companions(pci_dev, hcd);
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 13222d352a6..eb19cba34ac 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -658,7 +658,7 @@ error:
                                 len > offsetof(struct usb_device_descriptor,
                                                 bDeviceProtocol))
                         ((struct usb_device_descriptor *) ubuf)->
-                                        bDeviceProtocol = 1;
+                                bDeviceProtocol = USB_HUB_PR_HS_SINGLE_TT;
         }
 
         /* any errors get returned through the urb completion */
@@ -1168,20 +1168,6 @@ int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
         if (urb->unlinked)
                 return -EBUSY;
         urb->unlinked = status;
-
-        /* IRQ setup can easily be broken so that USB controllers
-         * never get completion IRQs ... maybe even the ones we need to
-         * finish unlinking the initial failed usb_set_address()
-         * or device descriptor fetch.
-         */
-        if (!HCD_SAW_IRQ(hcd) && !is_root_hub(urb->dev)) {
-                dev_warn(hcd->self.controller, "Unlink after no-IRQ?  "
-                        "Controller is probably using the wrong IRQ.\n");
-                set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
-                if (hcd->shared_hcd)
-                        set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
-        }
-
         return 0;
 }
 EXPORT_SYMBOL_GPL(usb_hcd_check_unlink_urb);
@@ -1412,11 +1398,10 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
                                         ret = -EAGAIN;
                                 else
                                         urb->transfer_flags |= URB_DMA_MAP_SG;
-                                if (n != urb->num_sgs) {
-                                        urb->num_sgs = n;
+                                urb->num_mapped_sgs = n;
+                                if (n != urb->num_sgs)
                                         urb->transfer_flags |=
                                                         URB_DMA_SG_COMBINED;
-                                }
                         } else if (urb->sg) {
                                 struct scatterlist *sg = urb->sg;
                                 urb->transfer_dma = dma_map_page(
@@ -2148,16 +2133,12 @@ irqreturn_t usb_hcd_irq (int irq, void *__hcd)
          */
         local_irq_save(flags);
 
-        if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd))) {
+        if (unlikely(HCD_DEAD(hcd) || !HCD_HW_ACCESSIBLE(hcd)))
                 rc = IRQ_NONE;
-        } else if (hcd->driver->irq(hcd) == IRQ_NONE) {
+        else if (hcd->driver->irq(hcd) == IRQ_NONE)
                 rc = IRQ_NONE;
-        } else {
-                set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
-                if (hcd->shared_hcd)
-                        set_bit(HCD_FLAG_SAW_IRQ, &hcd->shared_hcd->flags);
+        else
                 rc = IRQ_HANDLED;
-        }
 
         local_irq_restore(flags);
         return rc;
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 79781461eec..79d339e2e70 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -84,7 +84,7 @@ struct usb_hub {
 
 static inline int hub_is_superspeed(struct usb_device *hdev)
 {
-        return (hdev->descriptor.bDeviceProtocol == 3);
+        return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS);
 }
 
 /* Protect struct usb_device->state and ->children members
@@ -1041,58 +1041,58 @@ static int hub_configure(struct usb_hub *hub,
                 dev_dbg(hub_dev, "standalone hub\n");
 
         switch (wHubCharacteristics & HUB_CHAR_LPSM) {
-                case 0x00:
-                        dev_dbg(hub_dev, "ganged power switching\n");
-                        break;
-                case 0x01:
-                        dev_dbg(hub_dev, "individual port power switching\n");
-                        break;
-                case 0x02:
-                case 0x03:
-                        dev_dbg(hub_dev, "no power switching (usb 1.0)\n");
-                        break;
+        case HUB_CHAR_COMMON_LPSM:
+                dev_dbg(hub_dev, "ganged power switching\n");
+                break;
+        case HUB_CHAR_INDV_PORT_LPSM:
+                dev_dbg(hub_dev, "individual port power switching\n");
+                break;
+        case HUB_CHAR_NO_LPSM:
+        case HUB_CHAR_LPSM:
+                dev_dbg(hub_dev, "no power switching (usb 1.0)\n");
+                break;
         }
 
         switch (wHubCharacteristics & HUB_CHAR_OCPM) {
-                case 0x00:
-                        dev_dbg(hub_dev, "global over-current protection\n");
-                        break;
-                case 0x08:
-                        dev_dbg(hub_dev, "individual port over-current protection\n");
-                        break;
-                case 0x10:
-                case 0x18:
-                        dev_dbg(hub_dev, "no over-current protection\n");
-                        break;
+        case HUB_CHAR_COMMON_OCPM:
+                dev_dbg(hub_dev, "global over-current protection\n");
+                break;
+        case HUB_CHAR_INDV_PORT_OCPM:
+                dev_dbg(hub_dev, "individual port over-current protection\n");
+                break;
+        case HUB_CHAR_NO_OCPM:
+        case HUB_CHAR_OCPM:
+                dev_dbg(hub_dev, "no over-current protection\n");
+                break;
         }
 
         spin_lock_init (&hub->tt.lock);
         INIT_LIST_HEAD (&hub->tt.clear_list);
         INIT_WORK(&hub->tt.clear_work, hub_tt_work);
         switch (hdev->descriptor.bDeviceProtocol) {
-                case 0:
-                        break;
-                case 1:
-                        dev_dbg(hub_dev, "Single TT\n");
-                        hub->tt.hub = hdev;
-                        break;
-                case 2:
-                        ret = usb_set_interface(hdev, 0, 1);
-                        if (ret == 0) {
-                                dev_dbg(hub_dev, "TT per port\n");
-                                hub->tt.multi = 1;
-                        } else
-                                dev_err(hub_dev, "Using single TT (err %d)\n",
-                                        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);
-                        break;
+        case USB_HUB_PR_FS:
+                break;
+        case USB_HUB_PR_HS_SINGLE_TT:
+                dev_dbg(hub_dev, "Single TT\n");
+                hub->tt.hub = hdev;
+                break;
+        case USB_HUB_PR_HS_MULTI_TT:
+                ret = usb_set_interface(hdev, 0, 1);
+                if (ret == 0) {
+                        dev_dbg(hub_dev, "TT per port\n");
+                        hub->tt.multi = 1;
+                } else
+                        dev_err(hub_dev, "Using single TT (err %d)\n",
+                                ret);
+                hub->tt.hub = hdev;
+                break;
+        case USB_HUB_PR_SS:
+                /* USB 3.0 hubs don't have a TT */
+                break;
+        default:
+                dev_dbg(hub_dev, "Unrecognized hub protocol %d\n",
+                        hdev->descriptor.bDeviceProtocol);
+                break;
         }
 
         /* Note 8 FS bit times == (8 bits / 12000000 bps) ~= 666ns */
@@ -1360,7 +1360,6 @@ descriptor_error:
         return -ENODEV;
 }
 
-/* No BKL needed */
 static int
 hub_ioctl(struct usb_interface *intf, unsigned int code, void *user_data)
 {
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index ecf12e15a7e..4c65eb6a867 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -117,9 +117,12 @@ static const struct usb_device_id usb_quirk_list[] = {
         { USB_DEVICE(0x06a3, 0x0006), .driver_info =
                         USB_QUIRK_CONFIG_INTF_STRINGS },
 
-        /* Guillemot Webcam Hercules Dualpix Exchange*/
+        /* Guillemot Webcam Hercules Dualpix Exchange (2nd ID) */
         { USB_DEVICE(0x06f8, 0x0804), .driver_info = USB_QUIRK_RESET_RESUME },
 
+        /* Guillemot Webcam Hercules Dualpix Exchange*/
+        { USB_DEVICE(0x06f8, 0x3005), .driver_info = USB_QUIRK_RESET_RESUME },
+
         /* M-Systems Flash Disk Pioneers */
         { USB_DEVICE(0x08ec, 0x1000), .driver_info = USB_QUIRK_RESET_RESUME },
 
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 3888778582c..45e8479c377 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -132,20 +132,6 @@ static inline int is_usb_device_driver(struct device_driver *drv)
                         for_devices;
 }
 
-/* translate USB error codes to codes user space understands */
-static inline int usb_translate_errors(int error_code)
-{
-        switch (error_code) {
-        case 0:
-        case -ENOMEM:
-        case -ENODEV:
-                return error_code;
-        default:
-                return -EIO;
-        }
-}
-
-
 /* for labeling diagnostics */
 extern const char *usbcore_name;
 
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 3c1d67d324f..d8f741f9e56 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -1,7 +1,10 @@
 config USB_DWC3
         tristate "DesignWare USB3 DRD Core Support"
-        depends on (USB || USB_GADGET)
+        depends on (USB && USB_GADGET)
         select USB_OTG_UTILS
+        select USB_GADGET_DUALSPEED
+        select USB_GADGET_SUPERSPEED
+        select USB_XHCI_PLATFORM
         help
           Say Y or M here if your system has a Dual Role SuperSpeed
           USB controller based on the DesignWare USB3 IP Core.
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 593d1dbc465..900ae74357f 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -4,10 +4,8 @@ ccflags-$(CONFIG_USB_DWC3_VERBOSE)	+= -DVERBOSE_DEBUG
 obj-$(CONFIG_USB_DWC3)                  += dwc3.o
 
 dwc3-y                                  := core.o
-
-ifneq ($(CONFIG_USB_GADGET_DWC3),)
-        dwc3-y                          += gadget.o ep0.o
-endif
+dwc3-y                                  += host.o
+dwc3-y                                  += gadget.o ep0.o
 
 ifneq ($(CONFIG_DEBUG_FS),)
         dwc3-y                          += debugfs.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 600d8234851..7c9df630dbe 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -59,6 +59,60 @@
 
 #include "debug.h"
 
+static char *maximum_speed = "super";
+module_param(maximum_speed, charp, 0);
+MODULE_PARM_DESC(maximum_speed, "Maximum supported speed.");
+
+/* -------------------------------------------------------------------------- */
+
+#define DWC3_DEVS_POSSIBLE      32
+
+static DECLARE_BITMAP(dwc3_devs, DWC3_DEVS_POSSIBLE);
+
+int dwc3_get_device_id(void)
+{
+        int             id;
+
+again:
+        id = find_first_zero_bit(dwc3_devs, DWC3_DEVS_POSSIBLE);
+        if (id < DWC3_DEVS_POSSIBLE) {
+                int old;
+
+                old = test_and_set_bit(id, dwc3_devs);
+                if (old)
+                        goto again;
+        } else {
+                pr_err("dwc3: no space for new device\n");
+                id = -ENOMEM;
+        }
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(dwc3_get_device_id);
+
+void dwc3_put_device_id(int id)
+{
+        int                     ret;
+
+        if (id < 0)
+                return;
+
+        ret = test_bit(id, dwc3_devs);
+        WARN(!ret, "dwc3: ID %d not in use\n", id);
+        clear_bit(id, dwc3_devs);
+}
+EXPORT_SYMBOL_GPL(dwc3_put_device_id);
+
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode)
+{
+        u32 reg;
+
+        reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+        reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
+        reg |= DWC3_GCTL_PRTCAPDIR(mode);
+        dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+}
+
 /**
  * dwc3_core_soft_reset - Issues core soft reset and PHY reset
  * @dwc: pointer to our context structure
@@ -150,7 +204,7 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
         struct dwc3_event_buffer        *evt;
         int i;
 
-        for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
+        for (i = 0; i < dwc->num_event_buffers; i++) {
                 evt = dwc->ev_buffs[i];
                 if (evt) {
                         dwc3_free_one_event_buffer(dwc, evt);
@@ -162,17 +216,25 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc)
 /**
  * dwc3_alloc_event_buffers - Allocates @num event buffers of size @length
  * @dwc: Pointer to out controller context structure
- * @num: number of event buffers to allocate
  * @length: size of event buffer
  *
  * Returns 0 on success otherwise negative errno. In error the case, dwc
  * may contain some buffers allocated but not all which were requested.
  */
-static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned num,
-                unsigned length)
+static int __devinit dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length)
 {
+        int                     num;
         int                     i;
 
+        num = DWC3_NUM_INT(dwc->hwparams.hwparams1);
+        dwc->num_event_buffers = num;
+
+        dwc->ev_buffs = kzalloc(sizeof(*dwc->ev_buffs) * num, GFP_KERNEL);
+        if (!dwc->ev_buffs) {
+                dev_err(dwc->dev, "can't allocate event buffers array\n");
+                return -ENOMEM;
+        }
+
         for (i = 0; i < num; i++) {
                 struct dwc3_event_buffer        *evt;
 
@@ -198,7 +260,7 @@ static int __devinit dwc3_event_buffers_setup(struct dwc3 *dwc)
         struct dwc3_event_buffer        *evt;
         int                             n;
 
-        for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+        for (n = 0; n < dwc->num_event_buffers; n++) {
                 evt = dwc->ev_buffs[n];
                 dev_dbg(dwc->dev, "Event buf %p dma %08llx length %d\n",
                                 evt->buf, (unsigned long long) evt->dma,
@@ -221,7 +283,7 @@ static void dwc3_event_buffers_cleanup(struct dwc3 *dwc)
         struct dwc3_event_buffer        *evt;
         int                             n;
 
-        for (n = 0; n < DWC3_EVENT_BUFFERS_NUM; n++) {
+        for (n = 0; n < dwc->num_event_buffers; n++) {
                 evt = dwc->ev_buffs[n];
                 dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(n), 0);
                 dwc3_writel(dwc->regs, DWC3_GEVNTADRHI(n), 0);
@@ -285,8 +347,32 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
                 cpu_relax();
         } while (true);
 
-        ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_NUM,
-                        DWC3_EVENT_BUFFERS_SIZE);
+        dwc3_cache_hwparams(dwc);
+
+        reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+        reg &= ~DWC3_GCTL_SCALEDOWN(3);
+        reg &= ~DWC3_GCTL_DISSCRAMBLE;
+
+        switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams1)) {
+        case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
+                reg &= ~DWC3_GCTL_DSBLCLKGTNG;
+                break;
+        default:
+                dev_dbg(dwc->dev, "No power optimization available\n");
+        }
+
+        /*
+         * WORKAROUND: DWC3 revisions <1.90a have a bug
+         * when The device fails to connect at SuperSpeed
+         * and falls back to high-speed mode which causes
+         * the device to enter in a Connect/Disconnect loop
+         */
+        if (dwc->revision < DWC3_REVISION_190A)
+                reg |= DWC3_GCTL_U2RSTECN;
+
+        dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+
+        ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
         if (ret) {
                 dev_err(dwc->dev, "failed to allocate event buffers\n");
                 ret = -ENOMEM;
@@ -299,8 +385,6 @@ static int __devinit dwc3_core_init(struct dwc3 *dwc)
                 goto err1;
         }
 
-        dwc3_cache_hwparams(dwc);
-
         return 0;
 
 err1:
@@ -320,15 +404,17 @@ static void dwc3_core_exit(struct dwc3 *dwc)
 
 static int __devinit dwc3_probe(struct platform_device *pdev)
 {
-        const struct platform_device_id *id = platform_get_device_id(pdev);
         struct resource         *res;
         struct dwc3             *dwc;
-        void __iomem            *regs;
-        unsigned int            features = id->driver_data;
+
         int                     ret = -ENOMEM;
         int                     irq;
+
+        void __iomem            *regs;
         void                    *mem;
 
+        u8                      mode;
+
         mem = kzalloc(sizeof(*dwc) + DWC3_ALIGN_MASK, GFP_KERNEL);
         if (!mem) {
                 dev_err(&pdev->dev, "not enough memory\n");
@@ -343,6 +429,8 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
                 goto err1;
         }
 
+        dwc->res = res;
+
         res = request_mem_region(res->start, resource_size(res),
                         dev_name(&pdev->dev));
         if (!res) {
@@ -370,6 +458,17 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
         dwc->dev        = &pdev->dev;
         dwc->irq        = irq;
 
+        if (!strncmp("super", maximum_speed, 5))
+                dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+        else if (!strncmp("high", maximum_speed, 4))
+                dwc->maximum_speed = DWC3_DCFG_HIGHSPEED;
+        else if (!strncmp("full", maximum_speed, 4))
+                dwc->maximum_speed = DWC3_DCFG_FULLSPEED1;
+        else if (!strncmp("low", maximum_speed, 3))
+                dwc->maximum_speed = DWC3_DCFG_LOWSPEED;
+        else
+                dwc->maximum_speed = DWC3_DCFG_SUPERSPEED;
+
         pm_runtime_enable(&pdev->dev);
         pm_runtime_get_sync(&pdev->dev);
         pm_runtime_forbid(&pdev->dev);
@@ -380,13 +479,44 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
                 goto err3;
         }
 
-        if (features & DWC3_HAS_PERIPHERAL) {
+        mode = DWC3_MODE(dwc->hwparams.hwparams0);
+
+        switch (mode) {
+        case DWC3_MODE_DEVICE:
+                dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
                 ret = dwc3_gadget_init(dwc);
                 if (ret) {
-                        dev_err(&pdev->dev, "failed to initialized gadget\n");
+                        dev_err(&pdev->dev, "failed to initialize gadget\n");
                         goto err4;
                 }
+                break;
+        case DWC3_MODE_HOST:
+                dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_HOST);
+                ret = dwc3_host_init(dwc);
+                if (ret) {
+                        dev_err(&pdev->dev, "failed to initialize host\n");
+                        goto err4;
+                }
+                break;
+        case DWC3_MODE_DRD:
+                dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
+                ret = dwc3_host_init(dwc);
+                if (ret) {
+                        dev_err(&pdev->dev, "failed to initialize host\n");
+                        goto err4;
+                }
+
+                ret = dwc3_gadget_init(dwc);
+                if (ret) {
+                        dev_err(&pdev->dev, "failed to initialize gadget\n");
+                        goto err4;
+                }
+                break;
+        default:
+                dev_err(&pdev->dev, "Unsupported mode of operation %d\n", mode);
+                goto err4;
         }
+        dwc->mode = mode;
 
         ret = dwc3_debugfs_init(dwc);
         if (ret) {
@@ -399,8 +529,21 @@ static int __devinit dwc3_probe(struct platform_device *pdev)
         return 0;
 
 err5:
-        if (features & DWC3_HAS_PERIPHERAL)
+        switch (mode) {
+        case DWC3_MODE_DEVICE:
+                dwc3_gadget_exit(dwc);
+                break;
+        case DWC3_MODE_HOST:
+                dwc3_host_exit(dwc);
+                break;
+        case DWC3_MODE_DRD:
+                dwc3_host_exit(dwc);
                 dwc3_gadget_exit(dwc);
+                break;
+        default:
+                /* do nothing */
+                break;
+        }
 
 err4:
         dwc3_core_exit(dwc);
@@ -420,10 +563,8 @@ err0:
 
 static int __devexit dwc3_remove(struct platform_device *pdev)
 {
-        const struct platform_device_id *id = platform_get_device_id(pdev);
         struct dwc3     *dwc = platform_get_drvdata(pdev);
         struct resource *res;
-        unsigned int    features = id->driver_data;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 
@@ -432,8 +573,21 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
 
         dwc3_debugfs_exit(dwc);
 
-        if (features & DWC3_HAS_PERIPHERAL)
+        switch (dwc->mode) {
+        case DWC3_MODE_DEVICE:
+                dwc3_gadget_exit(dwc);
+                break;
+        case DWC3_MODE_HOST:
+                dwc3_host_exit(dwc);
+                break;
+        case DWC3_MODE_DRD:
+                dwc3_host_exit(dwc);
                 dwc3_gadget_exit(dwc);
+                break;
+        default:
+                /* do nothing */
+                break;
+        }
 
         dwc3_core_exit(dwc);
         release_mem_region(res->start, resource_size(res));
@@ -443,30 +597,15 @@ static int __devexit dwc3_remove(struct platform_device *pdev)
         return 0;
 }
 
-static const struct platform_device_id dwc3_id_table[] __devinitconst = {
-        {
-                .name   = "dwc3-omap",
-                .driver_data = (DWC3_HAS_PERIPHERAL
-                        | DWC3_HAS_XHCI
-                        | DWC3_HAS_OTG),
-        },
-        {
-                .name   = "dwc3-pci",
-                .driver_data = DWC3_HAS_PERIPHERAL,
-        },
-        {  },   /* Terminating Entry */
-};
-MODULE_DEVICE_TABLE(platform, dwc3_id_table);
-
 static struct platform_driver dwc3_driver = {
         .probe          = dwc3_probe,
         .remove         = __devexit_p(dwc3_remove),
         .driver         = {
                 .name   = "dwc3",
         },
-        .id_table       = dwc3_id_table,
 };
 
+MODULE_ALIAS("platform:dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_DESCRIPTION("DesignWare USB3 DRD Controller Driver");
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 29a8e1679e1..9e57f8e9bf1 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -41,6 +41,7 @@
 
 #include <linux/device.h>
 #include <linux/spinlock.h>
+#include <linux/ioport.h>
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/mm.h>
@@ -52,7 +53,6 @@
 /* Global constants */
 #define DWC3_ENDPOINTS_NUM      32
 
-#define DWC3_EVENT_BUFFERS_NUM  2
 #define DWC3_EVENT_BUFFERS_SIZE PAGE_SIZE
 #define DWC3_EVENT_TYPE_MASK    0xfe
 
@@ -153,6 +153,7 @@
 #define DWC3_GCTL_CLK_PIPEHALF  (2)
 #define DWC3_GCTL_CLK_MASK      (3)
 
+#define DWC3_GCTL_PRTCAP(n)     (((n) & (3 << 12)) >> 12)
 #define DWC3_GCTL_PRTCAPDIR(n)  (n << 12)
 #define DWC3_GCTL_PRTCAP_HOST   1
 #define DWC3_GCTL_PRTCAP_DEVICE 2
@@ -347,6 +348,7 @@ struct dwc3_ep {
         u32                     free_slot;
         u32                     busy_slot;
         const struct usb_endpoint_descriptor *desc;
+        const struct usb_ss_ep_comp_descriptor *comp_desc;
         struct dwc3             *dwc;
 
         unsigned                flags;
@@ -536,6 +538,31 @@ struct dwc3_hwparams {
         u32     hwparams8;
 };
 
+/* HWPARAMS0 */
+#define DWC3_MODE(n)            ((n) & 0x7)
+
+#define DWC3_MODE_DEVICE        0
+#define DWC3_MODE_HOST          1
+#define DWC3_MODE_DRD           2
+#define DWC3_MODE_HUB           3
+
+/* HWPARAMS1 */
+#define DWC3_NUM_INT(n) (((n) & (0x3f << 15)) >> 15)
+
+struct dwc3_request {
+        struct usb_request      request;
+        struct list_head        list;
+        struct dwc3_ep          *dep;
+
+        u8                      epnum;
+        struct dwc3_trb_hw      *trb;
+        dma_addr_t              trb_dma;
+
+        unsigned                direction:1;
+        unsigned                mapped:1;
+        unsigned                queued:1;
+};
+
 /**
  * struct dwc3 - representation of our controller
  * @ctrl_req: usb control request which is used for ep0
@@ -549,19 +576,24 @@ struct dwc3_hwparams {
  * @ep0_bounce_addr: dma address of ep0_bounce
  * @lock: for synchronizing
  * @dev: pointer to our struct device
+ * @xhci: pointer to our xHCI child
  * @event_buffer_list: a list of event buffers
  * @gadget: device side representation of the peripheral controller
  * @gadget_driver: pointer to the gadget driver
  * @regs: base address for our registers
  * @regs_size: address space size
  * @irq: IRQ number
+ * @num_event_buffers: calculated number of event buffers
+ * @u1u2: only used on revisions <1.83a for workaround
+ * @maximum_speed: maximum speed requested (mainly for testing purposes)
  * @revision: revision register contents
+ * @mode: mode of operation
  * @is_selfpowered: true when we are selfpowered
  * @three_stage_setup: set if we perform a three phase setup
- * @ep0_status_pending: ep0 status response without a req is pending
  * @ep0_bounced: true when we used bounce buffer
  * @ep0_expect_in: true when we expect a DATA IN transfer
  * @start_config_issued: true when StartConfig command has been issued
+ * @setup_packet_pending: true when there's a Setup Packet in FIFO. Workaround
  * @ep0_next_event: hold the next expected event
  * @ep0state: state of endpoint zero
  * @link_state: link state
@@ -579,12 +611,15 @@ struct dwc3 {
         dma_addr_t              ep0_trb_addr;
         dma_addr_t              setup_buf_addr;
         dma_addr_t              ep0_bounce_addr;
-        struct usb_request      ep0_usb_req;
+        struct dwc3_request     ep0_usb_req;
         /* device lock */
         spinlock_t              lock;
         struct device           *dev;
 
-        struct dwc3_event_buffer *ev_buffs[DWC3_EVENT_BUFFERS_NUM];
+        struct platform_device  *xhci;
+        struct resource         *res;
+
+        struct dwc3_event_buffer **ev_buffs;
         struct dwc3_ep          *eps[DWC3_ENDPOINTS_NUM];
 
         struct usb_gadget       gadget;
@@ -595,7 +630,11 @@ struct dwc3 {
 
         int                     irq;
 
+        u32                     num_event_buffers;
+        u32                     u1u2;
+        u32                     maximum_speed;
         u32                     revision;
+        u32                     mode;
 
 #define DWC3_REVISION_173A      0x5533173a
 #define DWC3_REVISION_175A      0x5533175a
@@ -607,10 +646,11 @@ struct dwc3 {
 
         unsigned                is_selfpowered:1;
         unsigned                three_stage_setup:1;
-        unsigned                ep0_status_pending:1;
         unsigned                ep0_bounced:1;
         unsigned                ep0_expect_in:1;
         unsigned                start_config_issued:1;
+        unsigned                setup_packet_pending:1;
+        unsigned                delayed_status:1;
 
         enum dwc3_ep0_next      ep0_next_event;
         enum dwc3_ep0_state     ep0state;
@@ -765,4 +805,16 @@ union dwc3_event {
 #define DWC3_HAS_XHCI                   BIT(1)
 #define DWC3_HAS_OTG                    BIT(3)
 
+/* prototypes */
+void dwc3_set_mode(struct dwc3 *dwc, u32 mode);
+
+int dwc3_host_init(struct dwc3 *dwc);
+void dwc3_host_exit(struct dwc3 *dwc);
+
+int dwc3_gadget_init(struct dwc3 *dwc);
+void dwc3_gadget_exit(struct dwc3 *dwc);
+
+extern int dwc3_get_device_id(void);
+extern void dwc3_put_device_id(int id);
+
 #endif /* __DRIVERS_USB_DWC3_CORE_H */
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index fcfa91517ea..433c97c15fc 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -44,12 +44,12 @@
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 #include <linux/delay.h>
-
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
 
 #include "core.h"
 #include "gadget.h"
 #include "io.h"
+#include "debug.h"
 
 #define dump_register(nm)                               \
 {                                                       \
@@ -395,6 +395,75 @@ static const struct file_operations dwc3_regdump_fops = {
         .release                = single_release,
 };
 
+static int dwc3_mode_show(struct seq_file *s, void *unused)
+{
+        struct dwc3             *dwc = s->private;
+        unsigned long           flags;
+        u32                     reg;
+
+        spin_lock_irqsave(&dwc->lock, flags);
+        reg = dwc3_readl(dwc->regs, DWC3_GCTL);
+        spin_unlock_irqrestore(&dwc->lock, flags);
+
+        switch (DWC3_GCTL_PRTCAP(reg)) {
+        case DWC3_GCTL_PRTCAP_HOST:
+                seq_printf(s, "host\n");
+                break;
+        case DWC3_GCTL_PRTCAP_DEVICE:
+                seq_printf(s, "device\n");
+                break;
+        case DWC3_GCTL_PRTCAP_OTG:
+                seq_printf(s, "OTG\n");
+                break;
+        default:
+                seq_printf(s, "UNKNOWN %08x\n", DWC3_GCTL_PRTCAP(reg));
+        }
+
+        return 0;
+}
+
+static int dwc3_mode_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, dwc3_mode_show, inode->i_private);
+}
+
+static ssize_t dwc3_mode_write(struct file *file,
+                const char __user *ubuf, size_t count, loff_t *ppos)
+{
+        struct seq_file         *s = file->private_data;
+        struct dwc3             *dwc = s->private;
+        unsigned long           flags;
+        u32                     mode = 0;
+        char                    buf[32];
+
+        if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
+                return -EFAULT;
+
+        if (!strncmp(buf, "host", 4))
+                mode |= DWC3_GCTL_PRTCAP_HOST;
+
+        if (!strncmp(buf, "device", 6))
+                mode |= DWC3_GCTL_PRTCAP_DEVICE;
+
+        if (!strncmp(buf, "otg", 3))
+                mode |= DWC3_GCTL_PRTCAP_OTG;
+
+        if (mode) {
+                spin_lock_irqsave(&dwc->lock, flags);
+                dwc3_set_mode(dwc, mode);
+                spin_unlock_irqrestore(&dwc->lock, flags);
+        }
+        return count;
+}
+
+static const struct file_operations dwc3_mode_fops = {
+        .open                   = dwc3_mode_open,
+        .write                  = dwc3_mode_write,
+        .read                   = seq_read,
+        .llseek                 = seq_lseek,
+        .release                = single_release,
+};
+
 int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
 {
         struct dentry           *root;
@@ -402,7 +471,7 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
         int                     ret;
 
         root = debugfs_create_dir(dev_name(dwc->dev), NULL);
-        if (IS_ERR(root)){
+        if (IS_ERR(root)) {
                 ret = PTR_ERR(root);
                 goto err0;
         }
@@ -415,6 +484,14 @@ int __devinit dwc3_debugfs_init(struct dwc3 *dwc)
                 ret = PTR_ERR(file);
                 goto err1;
         }
+
+        file = debugfs_create_file("mode", S_IRUGO | S_IWUSR, root,
+                        dwc, &dwc3_mode_fops);
+        if (IS_ERR(file)) {
+                ret = PTR_ERR(file);
+                goto err1;
+        }
+
         return 0;
 
 err1:
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 062552b5fc8..3274ac8f120 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -48,6 +48,7 @@
 #include <linux/io.h>
 #include <linux/module.h>
 
+#include "core.h"
 #include "io.h"
 
 /*
@@ -200,6 +201,7 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
         struct dwc3_omap        *omap;
         struct resource         *res;
 
+        int                     devid;
         int                     ret = -ENOMEM;
         int                     irq;
 
@@ -236,16 +238,20 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
                 goto err1;
         }
 
-        dwc3 = platform_device_alloc("dwc3-omap", -1);
+        devid = dwc3_get_device_id();
+        if (devid < 0)
+                goto err2;
+
+        dwc3 = platform_device_alloc("dwc3", devid);
         if (!dwc3) {
                 dev_err(&pdev->dev, "couldn't allocate dwc3 device\n");
-                goto err2;
+                goto err3;
         }
 
         context = kzalloc(resource_size(res), GFP_KERNEL);
         if (!context) {
                 dev_err(&pdev->dev, "couldn't allocate dwc3 context memory\n");
-                goto err3;
+                goto err4;
         }
 
         spin_lock_init(&omap->lock);
@@ -299,7 +305,7 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
         if (ret) {
                 dev_err(&pdev->dev, "failed to request IRQ #%d --> %d\n",
                                 omap->irq, ret);
-                goto err4;
+                goto err5;
         }
 
         /* enable all IRQs */
@@ -322,26 +328,29 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
                         pdev->num_resources);
         if (ret) {
                 dev_err(&pdev->dev, "couldn't add resources to dwc3 device\n");
-                goto err5;
+                goto err6;
         }
 
         ret = platform_device_add(dwc3);
         if (ret) {
                 dev_err(&pdev->dev, "failed to register dwc3 device\n");
-                goto err5;
+                goto err6;
         }
 
         return 0;
 
-err5:
+err6:
         free_irq(omap->irq, omap);
 
-err4:
+err5:
         kfree(omap->context);
 
-err3:
+err4:
         platform_device_put(dwc3);
 
+err3:
+        dwc3_put_device_id(devid);
+
 err2:
         iounmap(base);
 
@@ -358,6 +367,7 @@ static int __devexit dwc3_omap_remove(struct platform_device *pdev)
 
         platform_device_unregister(omap->dwc3);
 
+        dwc3_put_device_id(omap->dwc3->id);
         free_irq(omap->irq, omap);
         iounmap(omap->base);
 
@@ -384,18 +394,9 @@ static struct platform_driver dwc3_omap_driver = {
         },
 };
 
+module_platform_driver(dwc3_omap_driver);
+
+MODULE_ALIAS("platform:omap-dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
-
-static int __devinit dwc3_omap_init(void)
-{
-        return platform_driver_register(&dwc3_omap_driver);
-}
-module_init(dwc3_omap_init);
-
-static void __exit dwc3_omap_exit(void)
-{
-        platform_driver_unregister(&dwc3_omap_driver);
-}
-module_exit(dwc3_omap_exit);
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index f77c0004268..64e1f7c67b0 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -42,52 +42,17 @@
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 
+#include "core.h"
+
 /* FIXME define these in <linux/pci_ids.h> */
 #define PCI_VENDOR_ID_SYNOPSYS          0x16c3
 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
 
-#define DWC3_PCI_DEVS_POSSIBLE  32
-
 struct dwc3_pci {
         struct device           *dev;
         struct platform_device  *dwc3;
 };
 
-static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
-
-static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
-{
-        int             id;
-
-again:
-        id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
-        if (id < DWC3_PCI_DEVS_POSSIBLE) {
-                int old;
-
-                old = test_and_set_bit(id, dwc3_pci_devs);
-                if (old)
-                        goto again;
-        } else {
-                dev_err(glue->dev, "no space for new device\n");
-                id = -ENOMEM;
-        }
-
-        return 0;
-}
-
-static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
-{
-        int                     ret;
-
-        if (id < 0)
-                return;
-
-        ret = test_bit(id, dwc3_pci_devs);
-        WARN(!ret, "Device: %s\nID %d not in use\n",
-                        dev_driver_string(glue->dev), id);
-        clear_bit(id, dwc3_pci_devs);
-}
-
 static int __devinit dwc3_pci_probe(struct pci_dev *pci,
                 const struct pci_device_id *id)
 {
@@ -114,11 +79,11 @@ static int __devinit dwc3_pci_probe(struct pci_dev *pci,
         pci_set_power_state(pci, PCI_D0);
         pci_set_master(pci);
 
-        devid = dwc3_pci_get_device_id(glue);
+        devid = dwc3_get_device_id();
         if (devid < 0)
                 goto err2;
 
-        dwc3 = platform_device_alloc("dwc3-pci", devid);
+        dwc3 = platform_device_alloc("dwc3", devid);
         if (!dwc3) {
                 dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
                 goto err3;
@@ -163,13 +128,13 @@ err4:
         platform_device_put(dwc3);
 
 err3:
-        dwc3_pci_put_device_id(glue, devid);
+        dwc3_put_device_id(devid);
 
 err2:
         pci_disable_device(pci);
 
 err1:
-        kfree(pci);
+        kfree(glue);
 
 err0:
         return ret;
@@ -179,7 +144,7 @@ static void __devexit dwc3_pci_remove(struct pci_dev *pci)
 {
         struct dwc3_pci *glue = pci_get_drvdata(pci);
 
-        dwc3_pci_put_device_id(glue, glue->dwc3->id);
+        dwc3_put_device_id(glue->dwc3->id);
         platform_device_unregister(glue->dwc3);
         pci_set_drvdata(pci, NULL);
         pci_disable_device(pci);
@@ -196,7 +161,7 @@ static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
 
 static struct pci_driver dwc3_pci_driver = {
-        .name           = "pci-dwc3",
+        .name           = "dwc3-pci",
         .id_table       = dwc3_pci_id_table,
         .probe          = dwc3_pci_probe,
         .remove         = __devexit_p(dwc3_pci_remove),
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c
index 69a4e43ddf5..2f51de57593 100644
--- a/drivers/usb/dwc3/ep0.c
+++ b/drivers/usb/dwc3/ep0.c
@@ -48,13 +48,13 @@
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/usb/composite.h>
 
 #include "core.h"
 #include "gadget.h"
 #include "io.h"
 
-static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
-                const struct dwc3_event_depevt *event);
+static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum);
 
 static const char *dwc3_ep0_state_string(enum dwc3_ep0_state state)
 {
@@ -125,6 +125,8 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
 static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
                 struct dwc3_request *req)
 {
+        struct dwc3             *dwc = dep->dwc;
+        u32                     type;
         int                     ret = 0;
 
         req->request.actual     = 0;
@@ -143,9 +145,7 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
          * IRQ we were waiting for is long gone.
          */
         if (dep->flags & DWC3_EP_PENDING_REQUEST) {
-                struct dwc3     *dwc = dep->dwc;
                 unsigned        direction;
-                u32             type;
 
                 direction = !!(dep->flags & DWC3_EP0_DIR_IN);
 
@@ -165,6 +165,13 @@ static int __dwc3_gadget_ep0_queue(struct dwc3_ep *dep,
                                 req->request.dma, req->request.length, type);
                 dep->flags &= ~(DWC3_EP_PENDING_REQUEST |
                                 DWC3_EP0_DIR_IN);
+        } else if (dwc->delayed_status) {
+                dwc->delayed_status = false;
+
+                if (dwc->ep0state == EP0_STATUS_PHASE)
+                        dwc3_ep0_do_control_status(dwc, 1);
+                else
+                        dev_dbg(dwc->dev, "too early for delayed status\n");
         }
 
         return ret;
@@ -190,9 +197,7 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
         }
 
         /* we share one TRB for ep0/1 */
-        if (!list_empty(&dwc->eps[0]->request_list) ||
-                        !list_empty(&dwc->eps[1]->request_list) ||
-                        dwc->ep0_status_pending) {
+        if (!list_empty(&dep->request_list)) {
                 ret = -EBUSY;
                 goto out;
         }
@@ -214,8 +219,9 @@ static void dwc3_ep0_stall_and_restart(struct dwc3 *dwc)
         struct dwc3_ep          *dep = dwc->eps[0];
 
         /* stall is always issued on EP0 */
-        __dwc3_gadget_ep_set_halt(dwc->eps[0], 1);
-        dwc->eps[0]->flags = DWC3_EP_ENABLED;
+        __dwc3_gadget_ep_set_halt(dep, 1);
+        dep->flags = DWC3_EP_ENABLED;
+        dwc->delayed_status = false;
 
         if (!list_empty(&dep->request_list)) {
                 struct dwc3_request     *req;
@@ -254,17 +260,14 @@ static struct dwc3_ep *dwc3_wIndex_to_dep(struct dwc3 *dwc, __le16 wIndex_le)
         return NULL;
 }
 
-static void dwc3_ep0_send_status_response(struct dwc3 *dwc)
+static void dwc3_ep0_status_cmpl(struct usb_ep *ep, struct usb_request *req)
 {
-        dwc3_ep0_start_trans(dwc, 1, dwc->setup_buf_addr,
-                        dwc->ep0_usb_req.length,
-                        DWC3_TRBCTL_CONTROL_DATA);
 }
-
 /*
  * ch 9.4.5
  */
-static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
+static int dwc3_ep0_handle_status(struct dwc3 *dwc,
+                struct usb_ctrlrequest *ctrl)
 {
         struct dwc3_ep          *dep;
         u32                     recip;
@@ -291,7 +294,7 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl
         case USB_RECIP_ENDPOINT:
                 dep = dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
                 if (!dep)
-                       return -EINVAL;
+                        return -EINVAL;
 
                 if (dep->flags & DWC3_EP_STALL)
                         usb_status = 1 << USB_ENDPOINT_HALT;
@@ -302,10 +305,14 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl
 
         response_pkt = (__le16 *) dwc->setup_buf;
         *response_pkt = cpu_to_le16(usb_status);
-        dwc->ep0_usb_req.length = sizeof(*response_pkt);
-        dwc->ep0_status_pending = 1;
 
-        return 0;
+        dep = dwc->eps[0];
+        dwc->ep0_usb_req.dep = dep;
+        dwc->ep0_usb_req.request.length = sizeof(*response_pkt);
+        dwc->ep0_usb_req.request.dma = dwc->setup_buf_addr;
+        dwc->ep0_usb_req.request.complete = dwc3_ep0_status_cmpl;
+
+        return __dwc3_gadget_ep0_queue(dep, &dwc->ep0_usb_req);
 }
 
 static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
@@ -396,8 +403,7 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
         case USB_RECIP_ENDPOINT:
                 switch (wValue) {
                 case USB_ENDPOINT_HALT:
-
-                        dep =  dwc3_wIndex_to_dep(dwc, ctrl->wIndex);
+                        dep =  dwc3_wIndex_to_dep(dwc, wIndex);
                         if (!dep)
                                 return -EINVAL;
                         ret = __dwc3_gadget_ep_set_halt(dep, set);
@@ -422,8 +428,15 @@ static int dwc3_ep0_set_address(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
         u32 reg;
 
         addr = le16_to_cpu(ctrl->wValue);
-        if (addr > 127)
+        if (addr > 127) {
+                dev_dbg(dwc->dev, "invalid device address %d\n", addr);
                 return -EINVAL;
+        }
+
+        if (dwc->dev_state == DWC3_CONFIGURED_STATE) {
+                dev_dbg(dwc->dev, "trying to set address when configured\n");
+                return -EINVAL;
+        }
 
         reg = dwc3_readl(dwc->regs, DWC3_DCFG);
         reg &= ~(DWC3_DCFG_DEVADDR_MASK);
@@ -473,8 +486,10 @@ static int dwc3_ep0_set_config(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
                 if (!cfg)
                         dwc->dev_state = DWC3_ADDRESS_STATE;
                 break;
+        default:
+                ret = -EINVAL;
         }
-        return 0;
+        return ret;
 }
 
 static int dwc3_ep0_std_request(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl)
@@ -537,6 +552,9 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
         else
                 ret = dwc3_ep0_delegate_req(dwc, ctrl);
 
+        if (ret == USB_GADGET_DELAYED_STATUS)
+                dwc->delayed_status = true;
+
         if (ret >= 0)
                 return;
 
@@ -550,27 +568,21 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
         struct dwc3_request     *r = NULL;
         struct usb_request      *ur;
         struct dwc3_trb         trb;
-        struct dwc3_ep          *dep;
+        struct dwc3_ep          *ep0;
         u32                     transferred;
         u8                      epnum;
 
         epnum = event->endpoint_number;
-        dep = dwc->eps[epnum];
+        ep0 = dwc->eps[0];
 
         dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS;
 
-        if (!dwc->ep0_status_pending) {
-                r = next_request(&dwc->eps[0]->request_list);
-                ur = &r->request;
-        } else {
-                ur = &dwc->ep0_usb_req;
-                dwc->ep0_status_pending = 0;
-        }
+        r = next_request(&ep0->request_list);
+        ur = &r->request;
 
         dwc3_trb_to_nat(dwc->ep0_trb, &trb);
 
         if (dwc->ep0_bounced) {
-                struct dwc3_ep  *ep0 = dwc->eps[0];
 
                 transferred = min_t(u32, ur->length,
                                 ep0->endpoint.maxpacket - trb.length);
@@ -591,7 +603,7 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
                  * seems to be case when req.length > maxpacket. Could it be?
                  */
                 if (r)
-                        dwc3_gadget_giveback(dep, r, 0);
+                        dwc3_gadget_giveback(ep0, r, 0);
         }
 }
 
@@ -619,6 +631,7 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
         struct dwc3_ep          *dep = dwc->eps[event->endpoint_number];
 
         dep->flags &= ~DWC3_EP_BUSY;
+        dwc->setup_packet_pending = false;
 
         switch (dwc->ep0state) {
         case EP0_SETUP_PHASE:
@@ -643,7 +656,6 @@ static void dwc3_ep0_xfer_complete(struct dwc3 *dwc,
 static void dwc3_ep0_do_control_setup(struct dwc3 *dwc,
                 const struct dwc3_event_depevt *event)
 {
-        dwc->ep0state = EP0_SETUP_PHASE;
         dwc3_ep0_out_start(dwc);
 }
 
@@ -655,12 +667,6 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
         int                     ret;
 
         dep = dwc->eps[0];
-        dwc->ep0state = EP0_DATA_PHASE;
-
-        if (dwc->ep0_status_pending) {
-                dwc3_ep0_send_status_response(dwc);
-                return;
-        }
 
         if (list_empty(&dep->request_list)) {
                 dev_vdbg(dwc->dev, "pending request for EP0 Data phase\n");
@@ -674,7 +680,6 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
         req = next_request(&dep->request_list);
         req->direction = !!event->endpoint_number;
 
-        dwc->ep0state = EP0_DATA_PHASE;
         if (req->request.length == 0) {
                 ret = dwc3_ep0_start_trans(dwc, event->endpoint_number,
                                 dwc->ctrl_req_addr, 0,
@@ -706,35 +711,79 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
         WARN_ON(ret < 0);
 }
 
-static void dwc3_ep0_do_control_status(struct dwc3 *dwc,
-                const struct dwc3_event_depevt *event)
+static int dwc3_ep0_start_control_status(struct dwc3_ep *dep)
 {
+        struct dwc3             *dwc = dep->dwc;
         u32                     type;
-        int                     ret;
-
-        dwc->ep0state = EP0_STATUS_PHASE;
 
         type = dwc->three_stage_setup ? DWC3_TRBCTL_CONTROL_STATUS3
                 : DWC3_TRBCTL_CONTROL_STATUS2;
 
-        ret = dwc3_ep0_start_trans(dwc, event->endpoint_number,
+        return dwc3_ep0_start_trans(dwc, dep->number,
                         dwc->ctrl_req_addr, 0, type);
+}
 
-        WARN_ON(ret < 0);
+static void dwc3_ep0_do_control_status(struct dwc3 *dwc, u32 epnum)
+{
+        struct dwc3_ep          *dep = dwc->eps[epnum];
+
+        WARN_ON(dwc3_ep0_start_control_status(dep));
 }
 
 static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
                 const struct dwc3_event_depevt *event)
 {
+        dwc->setup_packet_pending = true;
+
+        /*
+         * This part is very tricky: If we has just handled
+         * XferNotReady(Setup) and we're now expecting a
+         * XferComplete but, instead, we receive another
+         * XferNotReady(Setup), we should STALL and restart
+         * the state machine.
+         *
+         * In all other cases, we just continue waiting
+         * for the XferComplete event.
+         *
+         * We are a little bit unsafe here because we're
+         * not trying to ensure that last event was, indeed,
+         * XferNotReady(Setup).
+         *
+         * Still, we don't expect any condition where that
+         * should happen and, even if it does, it would be
+         * another error condition.
+         */
+        if (dwc->ep0_next_event == DWC3_EP0_COMPLETE) {
+                switch (event->status) {
+                case DEPEVT_STATUS_CONTROL_SETUP:
+                        dev_vdbg(dwc->dev, "Unexpected XferNotReady(Setup)\n");
+                        dwc3_ep0_stall_and_restart(dwc);
+                        break;
+                case DEPEVT_STATUS_CONTROL_DATA:
+                        /* FALLTHROUGH */
+                case DEPEVT_STATUS_CONTROL_STATUS:
+                        /* FALLTHROUGH */
+                default:
+                        dev_vdbg(dwc->dev, "waiting for XferComplete\n");
+                }
+
+                return;
+        }
+
         switch (event->status) {
         case DEPEVT_STATUS_CONTROL_SETUP:
                 dev_vdbg(dwc->dev, "Control Setup\n");
+
+                dwc->ep0state = EP0_SETUP_PHASE;
+
                 dwc3_ep0_do_control_setup(dwc, event);
                 break;
 
         case DEPEVT_STATUS_CONTROL_DATA:
                 dev_vdbg(dwc->dev, "Control Data\n");
 
+                dwc->ep0state = EP0_DATA_PHASE;
+
                 if (dwc->ep0_next_event != DWC3_EP0_NRDY_DATA) {
                         dev_vdbg(dwc->dev, "Expected %d got %d\n",
                                         dwc->ep0_next_event,
@@ -764,6 +813,8 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
         case DEPEVT_STATUS_CONTROL_STATUS:
                 dev_vdbg(dwc->dev, "Control Status\n");
 
+                dwc->ep0state = EP0_STATUS_PHASE;
+
                 if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) {
                         dev_vdbg(dwc->dev, "Expected %d got %d\n",
                                         dwc->ep0_next_event,
@@ -772,12 +823,19 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
                         dwc3_ep0_stall_and_restart(dwc);
                         return;
                 }
-                dwc3_ep0_do_control_status(dwc, event);
+
+                if (dwc->delayed_status) {
+                        WARN_ON_ONCE(event->endpoint_number != 1);
+                        dev_vdbg(dwc->dev, "Mass Storage delayed status\n");
+                        return;
+                }
+
+                dwc3_ep0_do_control_status(dwc, event->endpoint_number);
         }
 }
 
 void dwc3_ep0_interrupt(struct dwc3 *dwc,
-                const const struct dwc3_event_depevt *event)
+                const struct dwc3_event_depevt *event)
 {
         u8                      epnum = event->endpoint_number;
 
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 25dbd8614e7..a696bde5322 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -65,6 +65,22 @@ void dwc3_map_buffer_to_dma(struct dwc3_request *req)
                 return;
         }
 
+        if (req->request.num_sgs) {
+                int     mapped;
+
+                mapped = dma_map_sg(dwc->dev, req->request.sg,
+                                req->request.num_sgs,
+                                req->direction ? DMA_TO_DEVICE
+                                : DMA_FROM_DEVICE);
+                if (mapped < 0) {
+                        dev_err(dwc->dev, "failed to map SGs\n");
+                        return;
+                }
+
+                req->request.num_mapped_sgs = mapped;
+                return;
+        }
+
         if (req->request.dma == DMA_ADDR_INVALID) {
                 req->request.dma = dma_map_single(dwc->dev, req->request.buf,
                                 req->request.length, req->direction
@@ -82,6 +98,17 @@ void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
                 return;
         }
 
+        if (req->request.num_mapped_sgs) {
+                req->request.dma = DMA_ADDR_INVALID;
+                dma_unmap_sg(dwc->dev, req->request.sg,
+                                req->request.num_sgs,
+                                req->direction ? DMA_TO_DEVICE
+                                : DMA_FROM_DEVICE);
+
+                req->request.num_mapped_sgs = 0;
+                return;
+        }
+
         if (req->mapped) {
                 dma_unmap_single(dwc->dev, req->request.dma,
                                 req->request.length, req->direction
@@ -97,7 +124,11 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
         struct dwc3                     *dwc = dep->dwc;
 
         if (req->queued) {
-                dep->busy_slot++;
+                if (req->request.num_mapped_sgs)
+                        dep->busy_slot += req->request.num_mapped_sgs;
+                else
+                        dep->busy_slot++;
+
                 /*
                  * Skip LINK TRB. We can't use req->trb and check for
                  * DWC3_TRBCTL_LINK_TRB because it points the TRB we just
@@ -108,6 +139,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
                         dep->busy_slot++;
         }
         list_del(&req->list);
+        req->trb = NULL;
 
         if (req->request.status == -EINPROGRESS)
                 req->request.status = status;
@@ -251,7 +283,8 @@ static int dwc3_gadget_start_config(struct dwc3 *dwc, struct dwc3_ep *dep)
 }
 
 static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
-                const struct usb_endpoint_descriptor *desc)
+                const struct usb_endpoint_descriptor *desc,
+                const struct usb_ss_ep_comp_descriptor *comp_desc)
 {
         struct dwc3_gadget_ep_cmd_params params;
 
@@ -264,7 +297,7 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
         params.param1 = DWC3_DEPCFG_XFER_COMPLETE_EN
                 | DWC3_DEPCFG_XFER_NOT_READY_EN;
 
-        if (usb_endpoint_xfer_bulk(desc) && dep->endpoint.max_streams) {
+        if (usb_ss_max_streams(comp_desc) && usb_endpoint_xfer_bulk(desc)) {
                 params.param1 |= DWC3_DEPCFG_STREAM_CAPABLE
                         | DWC3_DEPCFG_STREAM_EVENT_EN;
                 dep->stream_capable = true;
@@ -317,7 +350,8 @@ static int dwc3_gadget_set_xfer_resource(struct dwc3 *dwc, struct dwc3_ep *dep)
  * Caller should take care of locking
  */
 static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
-                const struct usb_endpoint_descriptor *desc)
+                const struct usb_endpoint_descriptor *desc,
+                const struct usb_ss_ep_comp_descriptor *comp_desc)
 {
         struct dwc3             *dwc = dep->dwc;
         u32                     reg;
@@ -329,7 +363,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
                         return ret;
         }
 
-        ret = dwc3_gadget_set_ep_config(dwc, dep, desc);
+        ret = dwc3_gadget_set_ep_config(dwc, dep, desc, comp_desc);
         if (ret)
                 return ret;
 
@@ -343,6 +377,7 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep,
                         return ret;
 
                 dep->desc = desc;
+                dep->comp_desc = comp_desc;
                 dep->type = usb_endpoint_type(desc);
                 dep->flags |= DWC3_EP_ENABLED;
 
@@ -405,6 +440,7 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep)
 
         dep->stream_capable = false;
         dep->desc = NULL;
+        dep->comp_desc = NULL;
         dep->type = 0;
         dep->flags = 0;
 
@@ -473,7 +509,7 @@ static int dwc3_gadget_ep_enable(struct usb_ep *ep,
         dev_vdbg(dwc->dev, "Enabling %s\n", dep->name);
 
         spin_lock_irqsave(&dwc->lock, flags);
-        ret = __dwc3_gadget_ep_enable(dep, desc);
+        ret = __dwc3_gadget_ep_enable(dep, desc, ep->comp_desc);
         spin_unlock_irqrestore(&dwc->lock, flags);
 
         return ret;
@@ -539,6 +575,85 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
         kfree(req);
 }
 
+/**
+ * dwc3_prepare_one_trb - setup one TRB from one request
+ * @dep: endpoint for which this request is prepared
+ * @req: dwc3_request pointer
+ */
+static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
+                struct dwc3_request *req, dma_addr_t dma,
+                unsigned length, unsigned last, unsigned chain)
+{
+        struct dwc3             *dwc = dep->dwc;
+        struct dwc3_trb_hw      *trb_hw;
+        struct dwc3_trb         trb;
+
+        unsigned int            cur_slot;
+
+        dev_vdbg(dwc->dev, "%s: req %p dma %08llx length %d%s%s\n",
+                        dep->name, req, (unsigned long long) dma,
+                        length, last ? " last" : "",
+                        chain ? " chain" : "");
+
+        trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
+        cur_slot = dep->free_slot;
+        dep->free_slot++;
+
+        /* Skip the LINK-TRB on ISOC */
+        if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
+                        usb_endpoint_xfer_isoc(dep->desc))
+                return;
+
+        memset(&trb, 0, sizeof(trb));
+        if (!req->trb) {
+                dwc3_gadget_move_request_queued(req);
+                req->trb = trb_hw;
+                req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw);
+        }
+
+        if (usb_endpoint_xfer_isoc(dep->desc)) {
+                trb.isp_imi = true;
+                trb.csp = true;
+        } else {
+                trb.chn = chain;
+                trb.lst = last;
+        }
+
+        if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable)
+                trb.sid_sofn = req->request.stream_id;
+
+        switch (usb_endpoint_type(dep->desc)) {
+        case USB_ENDPOINT_XFER_CONTROL:
+                trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP;
+                break;
+
+        case USB_ENDPOINT_XFER_ISOC:
+                trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
+
+                /* IOC every DWC3_TRB_NUM / 4 so we can refill */
+                if (!(cur_slot % (DWC3_TRB_NUM / 4)))
+                        trb.ioc = last;
+                break;
+
+        case USB_ENDPOINT_XFER_BULK:
+        case USB_ENDPOINT_XFER_INT:
+                trb.trbctl = DWC3_TRBCTL_NORMAL;
+                break;
+        default:
+                /*
+                 * This is only possible with faulty memory because we
+                 * checked it already :)
+                 */
+                BUG();
+        }
+
+        trb.length      = length;
+        trb.bplh        = dma;
+        trb.hwo         = true;
+
+        dwc3_trb_to_hw(&trb, trb_hw);
+}
+
 /*
  * dwc3_prepare_trbs - setup TRBs from requests
  * @dep: endpoint for which requests are being prepared
@@ -548,18 +663,17 @@ static void dwc3_gadget_ep_free_request(struct usb_ep *ep,
  * transfers. The functions returns once there are not more TRBs available or
  * it run out of requests.
  */
-static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep,
-                bool starting)
+static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting)
 {
-        struct dwc3_request     *req, *n, *ret = NULL;
-        struct dwc3_trb_hw      *trb_hw;
-        struct dwc3_trb         trb;
+        struct dwc3_request     *req, *n;
         u32                     trbs_left;
+        unsigned int            last_one = 0;
 
         BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM);
 
         /* the first request must not be queued */
         trbs_left = (dep->busy_slot - dep->free_slot) & DWC3_TRB_MASK;
+
         /*
          * if busy & slot are equal than it is either full or empty. If we are
          * starting to proceed requests then we are empty. Otherwise we ar
@@ -567,7 +681,7 @@ static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep,
          */
         if (!trbs_left) {
                 if (!starting)
-                        return NULL;
+                        return;
                 trbs_left = DWC3_TRB_NUM;
                 /*
                  * In case we start from scratch, we queue the ISOC requests
@@ -591,94 +705,62 @@ static struct dwc3_request *dwc3_prepare_trbs(struct dwc3_ep *dep,
 
         /* The last TRB is a link TRB, not used for xfer */
         if ((trbs_left <= 1) && usb_endpoint_xfer_isoc(dep->desc))
-                return NULL;
+                return;
 
         list_for_each_entry_safe(req, n, &dep->request_list, list) {
-                unsigned int last_one = 0;
-                unsigned int cur_slot;
+                unsigned        length;
+                dma_addr_t      dma;
 
-                trb_hw = &dep->trb_pool[dep->free_slot & DWC3_TRB_MASK];
-                cur_slot = dep->free_slot;
-                dep->free_slot++;
+                if (req->request.num_mapped_sgs > 0) {
+                        struct usb_request *request = &req->request;
+                        struct scatterlist *sg = request->sg;
+                        struct scatterlist *s;
+                        int             i;
 
-                /* Skip the LINK-TRB on ISOC */
-                if (((cur_slot & DWC3_TRB_MASK) == DWC3_TRB_NUM - 1) &&
-                                usb_endpoint_xfer_isoc(dep->desc))
-                        continue;
+                        for_each_sg(sg, s, request->num_mapped_sgs, i) {
+                                unsigned chain = true;
 
-                dwc3_gadget_move_request_queued(req);
-                memset(&trb, 0, sizeof(trb));
-                trbs_left--;
+                                length = sg_dma_len(s);
+                                dma = sg_dma_address(s);
 
-                /* Is our TRB pool empty? */
-                if (!trbs_left)
-                        last_one = 1;
-                /* Is this the last request? */
-                if (list_empty(&dep->request_list))
-                        last_one = 1;
+                                if (i == (request->num_mapped_sgs - 1)
+                                                || sg_is_last(s)) {
+                                        last_one = true;
+                                        chain = false;
+                                }
 
-                /*
-                 * FIXME we shouldn't need to set LST bit always but we are
-                 * facing some weird problem with the Hardware where it doesn't
-                 * complete even though it has been previously started.
-                 *
-                 * While we're debugging the problem, as a workaround to
-                 * multiple TRBs handling, use only one TRB at a time.
-                 */
-                last_one = 1;
+                                trbs_left--;
+                                if (!trbs_left)
+                                        last_one = true;
 
-                req->trb = trb_hw;
-                if (!ret)
-                        ret = req;
+                                if (last_one)
+                                        chain = false;
 
-                trb.bplh = req->request.dma;
+                                dwc3_prepare_one_trb(dep, req, dma, length,
+                                                last_one, chain);
 
-                if (usb_endpoint_xfer_isoc(dep->desc)) {
-                        trb.isp_imi = true;
-                        trb.csp = true;
+                                if (last_one)
+                                        break;
+                        }
                 } else {
-                        trb.lst = last_one;
-                }
+                        dma = req->request.dma;
+                        length = req->request.length;
+                        trbs_left--;
 
-                if (usb_endpoint_xfer_bulk(dep->desc) && dep->stream_capable)
-                        trb.sid_sofn = req->request.stream_id;
-
-                switch (usb_endpoint_type(dep->desc)) {
-                case USB_ENDPOINT_XFER_CONTROL:
-                        trb.trbctl = DWC3_TRBCTL_CONTROL_SETUP;
-                        break;
+                        if (!trbs_left)
+                                last_one = 1;
 
-                case USB_ENDPOINT_XFER_ISOC:
-                        trb.trbctl = DWC3_TRBCTL_ISOCHRONOUS_FIRST;
+                        /* Is this the last request? */
+                        if (list_is_last(&req->list, &dep->request_list))
+                                last_one = 1;
 
-                        /* IOC every DWC3_TRB_NUM / 4 so we can refill */
-                        if (!(cur_slot % (DWC3_TRB_NUM / 4)))
-                                trb.ioc = last_one;
-                        break;
+                        dwc3_prepare_one_trb(dep, req, dma, length,
+                                        last_one, false);
 
-                case USB_ENDPOINT_XFER_BULK:
-                case USB_ENDPOINT_XFER_INT:
-                        trb.trbctl = DWC3_TRBCTL_NORMAL;
-                        break;
-                default:
-                        /*
-                         * This is only possible with faulty memory because we
-                         * checked it already :)
-                         */
-                        BUG();
+                        if (last_one)
+                                break;
                 }
-
-                trb.length      = req->request.length;
-                trb.hwo = true;
-
-                dwc3_trb_to_hw(&trb, trb_hw);
-                req->trb_dma = dwc3_trb_dma_offset(dep, trb_hw);
-
-                if (last_one)
-                        break;
         }
-
-        return ret;
 }
 
 static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
@@ -707,11 +789,13 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
                 /* req points to the first request which will be sent */
                 req = next_request(&dep->req_queued);
         } else {
+                dwc3_prepare_trbs(dep, start_new);
+
                 /*
                  * req points to the first request where HWO changed
                  * from 0 to 1
                  */
-                req = dwc3_prepare_trbs(dep, start_new);
+                req = next_request(&dep->req_queued);
         }
         if (!req) {
                 dep->flags |= DWC3_EP_PENDING_REQUEST;
@@ -745,8 +829,9 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep, u16 cmd_param,
         dep->flags |= DWC3_EP_BUSY;
         dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc,
                         dep->number);
-        if (!dep->res_trans_idx)
-                printk_once(KERN_ERR "%s() res_trans_idx is invalid\n", __func__);
+
+        WARN_ON_ONCE(!dep->res_trans_idx);
+
         return 0;
 }
 
@@ -1155,35 +1240,9 @@ static int dwc3_gadget_start(struct usb_gadget *g,
         dwc->gadget_driver      = driver;
         dwc->gadget.dev.driver  = &driver->driver;
 
-        reg = dwc3_readl(dwc->regs, DWC3_GCTL);
-
-        reg &= ~DWC3_GCTL_SCALEDOWN(3);
-        reg &= ~DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG);
-        reg &= ~DWC3_GCTL_DISSCRAMBLE;
-        reg |= DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_DEVICE);
-
-        switch (DWC3_GHWPARAMS1_EN_PWROPT(dwc->hwparams.hwparams0)) {
-        case DWC3_GHWPARAMS1_EN_PWROPT_CLK:
-                reg &= ~DWC3_GCTL_DSBLCLKGTNG;
-                break;
-        default:
-                dev_dbg(dwc->dev, "No power optimization available\n");
-        }
-
-        /*
-         * WORKAROUND: DWC3 revisions <1.90a have a bug
-         * when The device fails to connect at SuperSpeed
-         * and falls back to high-speed mode which causes
-         * the device to enter in a Connect/Disconnect loop
-         */
-        if (dwc->revision < DWC3_REVISION_190A)
-                reg |= DWC3_GCTL_U2RSTECN;
-
-        dwc3_writel(dwc->regs, DWC3_GCTL, reg);
-
         reg = dwc3_readl(dwc->regs, DWC3_DCFG);
         reg &= ~(DWC3_DCFG_SPEED_MASK);
-        reg |= DWC3_DCFG_SUPERSPEED;
+        reg |= dwc->maximum_speed;
         dwc3_writel(dwc->regs, DWC3_DCFG, reg);
 
         dwc->start_config_issued = false;
@@ -1192,14 +1251,14 @@ static int dwc3_gadget_start(struct usb_gadget *g,
         dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
 
         dep = dwc->eps[0];
-        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
         if (ret) {
                 dev_err(dwc->dev, "failed to enable %s\n", dep->name);
                 goto err0;
         }
 
         dep = dwc->eps[1];
-        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
         if (ret) {
                 dev_err(dwc->dev, "failed to enable %s\n", dep->name);
                 goto err1;
@@ -1290,11 +1349,10 @@ static int __devinit dwc3_gadget_init_endpoints(struct dwc3 *dwc)
                                         &dwc->gadget.ep_list);
 
                         ret = dwc3_alloc_trb_pool(dep);
-                        if (ret) {
-                                dev_err(dwc->dev, "%s: failed to allocate TRB pool\n", dep->name);
+                        if (ret)
                                 return ret;
-                        }
                 }
+
                 INIT_LIST_HEAD(&dep->request_list);
                 INIT_LIST_HEAD(&dep->req_queued);
         }
@@ -1334,8 +1392,10 @@ static int dwc3_cleanup_done_reqs(struct dwc3 *dwc, struct dwc3_ep *dep,
 
         do {
                 req = next_request(&dep->req_queued);
-                if (!req)
-                        break;
+                if (!req) {
+                        WARN_ON_ONCE(1);
+                        return 1;
+                }
 
                 dwc3_trb_to_nat(req->trb, &trb);
 
@@ -1400,6 +1460,31 @@ static void dwc3_endpoint_transfer_complete(struct dwc3 *dwc,
                 dep->flags &= ~DWC3_EP_BUSY;
                 dep->res_trans_idx = 0;
         }
+
+        /*
+         * WORKAROUND: This is the 2nd half of U1/U2 -> U0 workaround.
+         * See dwc3_gadget_linksts_change_interrupt() for 1st half.
+         */
+        if (dwc->revision < DWC3_REVISION_183A) {
+                u32             reg;
+                int             i;
+
+                for (i = 0; i < DWC3_ENDPOINTS_NUM; i++) {
+                        struct dwc3_ep  *dep = dwc->eps[i];
+
+                        if (!(dep->flags & DWC3_EP_ENABLED))
+                                continue;
+
+                        if (!list_empty(&dep->req_queued))
+                                return;
+                }
+
+                reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+                reg |= dwc->u1u2;
+                dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+
+                dwc->u1u2 = 0;
+        }
 }
 
 static void dwc3_gadget_start_isoc(struct dwc3 *dwc,
@@ -1639,6 +1724,7 @@ static void dwc3_gadget_disconnect_interrupt(struct dwc3 *dwc)
         dwc->start_config_issued = false;
 
         dwc->gadget.speed = USB_SPEED_UNKNOWN;
+        dwc->setup_packet_pending = false;
 }
 
 static void dwc3_gadget_usb3_phy_power(struct dwc3 *dwc, int on)
@@ -1675,6 +1761,40 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
 
         dev_vdbg(dwc->dev, "%s\n", __func__);
 
+        /*
+         * WORKAROUND: DWC3 revisions <1.88a have an issue which
+         * would cause a missing Disconnect Event if there's a
+         * pending Setup Packet in the FIFO.
+         *
+         * There's no suggested workaround on the official Bug
+         * report, which states that "unless the driver/application
+         * is doing any special handling of a disconnect event,
+         * there is no functional issue".
+         *
+         * Unfortunately, it turns out that we _do_ some special
+         * handling of a disconnect event, namely complete all
+         * pending transfers, notify gadget driver of the
+         * disconnection, and so on.
+         *
+         * Our suggested workaround is to follow the Disconnect
+         * Event steps here, instead, based on a setup_packet_pending
+         * flag. Such flag gets set whenever we have a XferNotReady
+         * event on EP0 and gets cleared on XferComplete for the
+         * same endpoint.
+         *
+         * Refers to:
+         *
+         * STAR#9000466709: RTL: Device : Disconnect event not
+         * generated if setup packet pending in FIFO
+         */
+        if (dwc->revision < DWC3_REVISION_188A) {
+                if (dwc->setup_packet_pending)
+                        dwc3_gadget_disconnect_interrupt(dwc);
+        }
+
+        /* after reset -> Default State */
+        dwc->dev_state = DWC3_DEFAULT_STATE;
+
         /* Enable PHYs */
         dwc3_gadget_usb2_phy_power(dwc, true);
         dwc3_gadget_usb3_phy_power(dwc, true);
@@ -1755,6 +1875,22 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 
         switch (speed) {
         case DWC3_DCFG_SUPERSPEED:
+                /*
+                 * WORKAROUND: DWC3 revisions <1.90a have an issue which
+                 * would cause a missing USB3 Reset event.
+                 *
+                 * In such situations, we should force a USB3 Reset
+                 * event by calling our dwc3_gadget_reset_interrupt()
+                 * routine.
+                 *
+                 * Refers to:
+                 *
+                 * STAR#9000483510: RTL: SS : USB3 reset event may
+                 * not be generated always when the link enters poll
+                 */
+                if (dwc->revision < DWC3_REVISION_190A)
+                        dwc3_gadget_reset_interrupt(dwc);
+
                 dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512);
                 dwc->gadget.ep0->maxpacket = 512;
                 dwc->gadget.speed = USB_SPEED_SUPER;
@@ -1781,14 +1917,14 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
         dwc3_gadget_disable_phy(dwc, dwc->gadget.speed);
 
         dep = dwc->eps[0];
-        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
         if (ret) {
                 dev_err(dwc->dev, "failed to enable %s\n", dep->name);
                 return;
         }
 
         dep = dwc->eps[1];
-        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc);
+        ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL);
         if (ret) {
                 dev_err(dwc->dev, "failed to enable %s\n", dep->name);
                 return;
@@ -1818,8 +1954,55 @@ static void dwc3_gadget_wakeup_interrupt(struct dwc3 *dwc)
 static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc,
                 unsigned int evtinfo)
 {
-        /*  The fith bit says SuperSpeed yes or no. */
-        dwc->link_state = evtinfo & DWC3_LINK_STATE_MASK;
+        enum dwc3_link_state    next = evtinfo & DWC3_LINK_STATE_MASK;
+
+        /*
+         * WORKAROUND: DWC3 Revisions <1.83a have an issue which, depending
+         * on the link partner, the USB session might do multiple entry/exit
+         * of low power states before a transfer takes place.
+         *
+         * Due to this problem, we might experience lower throughput. The
+         * suggested workaround is to disable DCTL[12:9] bits if we're
+         * transitioning from U1/U2 to U0 and enable those bits again
+         * after a transfer completes and there are no pending transfers
+         * on any of the enabled endpoints.
+         *
+         * This is the first half of that workaround.
+         *
+         * Refers to:
+         *
+         * STAR#9000446952: RTL: Device SS : if U1/U2 ->U0 takes >128us
+         * core send LGO_Ux entering U0
+         */
+        if (dwc->revision < DWC3_REVISION_183A) {
+                if (next == DWC3_LINK_STATE_U0) {
+                        u32     u1u2;
+                        u32     reg;
+
+                        switch (dwc->link_state) {
+                        case DWC3_LINK_STATE_U1:
+                        case DWC3_LINK_STATE_U2:
+                                reg = dwc3_readl(dwc->regs, DWC3_DCTL);
+                                u1u2 = reg & (DWC3_DCTL_INITU2ENA
+                                                | DWC3_DCTL_ACCEPTU2ENA
+                                                | DWC3_DCTL_INITU1ENA
+                                                | DWC3_DCTL_ACCEPTU1ENA);
+
+                                if (!dwc->u1u2)
+                                        dwc->u1u2 = reg & u1u2;
+
+                                reg &= ~u1u2;
+
+                                dwc3_writel(dwc->regs, DWC3_DCTL, reg);
+                                break;
+                        default:
+                                /* do nothing */
+                                break;
+                        }
+                }
+        }
+
+        dwc->link_state = next;
 
         dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state);
 }
@@ -1925,7 +2108,7 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
 
         spin_lock(&dwc->lock);
 
-        for (i = 0; i < DWC3_EVENT_BUFFERS_NUM; i++) {
+        for (i = 0; i < dwc->num_event_buffers; i++) {
                 irqreturn_t status;
 
                 status = dwc3_process_event_buf(dwc, i);
@@ -1986,9 +2169,10 @@ int __devinit dwc3_gadget_init(struct dwc3 *dwc)
         dev_set_name(&dwc->gadget.dev, "gadget");
 
         dwc->gadget.ops                 = &dwc3_gadget_ops;
-        dwc->gadget.is_dualspeed        = true;
+        dwc->gadget.max_speed           = USB_SPEED_SUPER;
         dwc->gadget.speed               = USB_SPEED_UNKNOWN;
         dwc->gadget.dev.parent          = dwc->dev;
+        dwc->gadget.sg_supported        = true;
 
         dma_set_coherent_mask(&dwc->gadget.dev, dwc->dev->coherent_dma_mask);
 
@@ -2076,7 +2260,6 @@ err0:
 void dwc3_gadget_exit(struct dwc3 *dwc)
 {
         int                     irq;
-        int                     i;
 
         usb_del_gadget_udc(&dwc->gadget);
         irq = platform_get_irq(to_platform_device(dwc->dev), 0);
@@ -2084,9 +2267,6 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
         dwc3_writel(dwc->regs, DWC3_DEVTEN, 0x00);
         free_irq(irq, dwc);
 
-        for (i = 0; i < ARRAY_SIZE(dwc->eps); i++)
-                __dwc3_gadget_ep_disable(dwc->eps[i]);
-
         dwc3_gadget_free_endpoints(dwc);
 
         dma_free_coherent(dwc->dev, 512, dwc->ep0_bounce,
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index 71145a449d9..d97f467d41c 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -79,19 +79,6 @@ struct dwc3_gadget_ep_cmd_params {
 
 /* -------------------------------------------------------------------------- */
 
-struct dwc3_request {
-        struct usb_request      request;
-        struct list_head        list;
-        struct dwc3_ep          *dep;
-
-        u8                      epnum;
-        struct dwc3_trb_hw      *trb;
-        dma_addr_t              trb_dma;
-
-        unsigned                direction:1;
-        unsigned                mapped:1;
-        unsigned                queued:1;
-};
 #define to_dwc3_request(r)      (container_of(r, struct dwc3_request, request))
 
 static inline struct dwc3_request *next_request(struct list_head *list)
@@ -110,23 +97,11 @@ static inline void dwc3_gadget_move_request_queued(struct dwc3_request *req)
         list_move_tail(&req->list, &dep->req_queued);
 }
 
-#if defined(CONFIG_USB_GADGET_DWC3) || defined(CONFIG_USB_GADGET_DWC3_MODULE)
-int dwc3_gadget_init(struct dwc3 *dwc);
-void dwc3_gadget_exit(struct dwc3 *dwc);
-#else
-static inline int dwc3_gadget_init(struct dwc3 *dwc) { return 0; }
-static inline void dwc3_gadget_exit(struct dwc3 *dwc) { }
-static inline int dwc3_send_gadget_ep_cmd(struct dwc3 *dwc, unsigned ep,
-                unsigned cmd, struct dwc3_gadget_ep_cmd_params *params)
-{
-        return 0;
-}
-#endif
-
 void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
                 int status);
 
-void dwc3_ep0_interrupt(struct dwc3 *dwc, const struct dwc3_event_depevt *event);
+void dwc3_ep0_interrupt(struct dwc3 *dwc,
+                const struct dwc3_event_depevt *event);
 void dwc3_ep0_out_start(struct dwc3 *dwc);
 int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request,
                 gfp_t gfp_flags);
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
new file mode 100644
index 00000000000..7cfe211b6c3
--- /dev/null
+++ b/drivers/usb/dwc3/host.c
@@ -0,0 +1,102 @@
+/**
+ * host.c - DesignWare USB3 DRD Controller Host Glue
+ *
+ * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Authors: Felipe Balbi <balbi@ti.com>,
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The names of the above-listed copyright holders may not be used
+ *    to endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2, as published by the Free
+ * Software Foundation.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <linux/platform_device.h>
+
+#include "core.h"
+
+static struct resource generic_resources[] = {
+        {
+                .flags = IORESOURCE_IRQ,
+        },
+        {
+                .flags = IORESOURCE_MEM,
+        },
+};
+
+int dwc3_host_init(struct dwc3 *dwc)
+{
+        struct platform_device  *xhci;
+        int                     ret;
+
+        xhci = platform_device_alloc("xhci", -1);
+        if (!xhci) {
+                dev_err(dwc->dev, "couldn't allocate xHCI device\n");
+                ret = -ENOMEM;
+                goto err0;
+        }
+
+        dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
+
+        xhci->dev.parent        = dwc->dev;
+        xhci->dev.dma_mask      = dwc->dev->dma_mask;
+        xhci->dev.dma_parms     = dwc->dev->dma_parms;
+
+        dwc->xhci = xhci;
+
+        /* setup resources */
+        generic_resources[0].start = dwc->irq;
+
+        generic_resources[1].start = dwc->res->start;
+        generic_resources[1].end = dwc->res->start + 0x7fff;
+
+        ret = platform_device_add_resources(xhci, generic_resources,
+                        ARRAY_SIZE(generic_resources));
+        if (ret) {
+                dev_err(dwc->dev, "couldn't add resources to xHCI device\n");
+                goto err1;
+        }
+
+        ret = platform_device_add(xhci);
+        if (ret) {
+                dev_err(dwc->dev, "failed to register xHCI device\n");
+                goto err1;
+        }
+
+        return 0;
+
+err1:
+        platform_device_put(xhci);
+
+err0:
+        return ret;
+}
+
+void dwc3_host_exit(struct dwc3 *dwc)
+{
+        platform_device_unregister(dwc->xhci);
+}
diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h
index bc957db1ea4..071d561f3e6 100644
--- a/drivers/usb/dwc3/io.h
+++ b/drivers/usb/dwc3/io.h
@@ -39,7 +39,7 @@
 #ifndef __DRIVERS_USB_DWC3_IO_H
 #define __DRIVERS_USB_DWC3_IO_H
 
-#include <asm/io.h>
+#include <linux/io.h>
 
 static inline u32 dwc3_readl(void __iomem *base, u32 offset)
 {
diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 12a401a144b..7ecb68a6741 100644
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -15,6 +15,7 @@
 
 menuconfig USB_GADGET
         tristate "USB Gadget Support"
+        select NLS
         help
            USB is a master/slave protocol, organized with one master
            host (such as a PC) controlling up to 127 peripheral devices.
@@ -124,7 +125,6 @@ config USB_GADGET_STORAGE_NUM_BUFFERS
 #
 choice
         prompt "USB Peripheral Controller"
-        depends on USB_GADGET
         help
            A USB device uses a controller to talk to its host.
            Systems should have only one such upstream link.
@@ -234,7 +234,6 @@ config USB_R8A66597
 
 config USB_RENESAS_USBHS_UDC
         tristate 'Renesas USBHS controller'
-        depends on SUPERH || ARCH_SHMOBILE
         depends on USB_RENESAS_USBHS
         select USB_GADGET_DUALSPEED
         help
@@ -309,25 +308,13 @@ config USB_S3C_HSUDC
 
           This driver has been tested on S3C2416 and S3C2450 processors.
 
-config USB_PXA_U2O
-        tristate "PXA9xx Processor USB2.0 controller"
-        depends on ARCH_MMP
+config USB_MV_UDC
+        tristate "Marvell USB2.0 Device Controller"
         select USB_GADGET_DUALSPEED
         help
-          PXA9xx Processor series include a high speed USB2.0 device
-          controller, which support high speed and full speed USB peripheral.
-
-config USB_GADGET_DWC3
-        tristate "DesignWare USB3.0 (DRD) Controller"
-        depends on USB_DWC3
-        select USB_GADGET_DUALSPEED
-        select USB_GADGET_SUPERSPEED
-        help
-          DesignWare USB3.0 controller is a SuperSpeed USB3.0 Controller
-          which can be configured for peripheral-only, host-only, hub-only
-          and Dual-Role operation. This Controller was first integrated into
-          the OMAP5 series of processors. More information about the OMAP5
-          version of this controller, refer to http://www.ti.com/omap5.
+          Marvell Socs (including PXA and MMP series) include a high speed
+          USB2.0 OTG controller, which can be configured as high speed or
+          full speed USB peripheral.
 
 #
 # Controllers available in both integrated and discrete versions
@@ -543,12 +530,10 @@ endchoice
 # Selected by UDC drivers that support high-speed operation.
 config USB_GADGET_DUALSPEED
         bool
-        depends on USB_GADGET
 
 # Selected by UDC drivers that support super-speed opperation
 config USB_GADGET_SUPERSPEED
         bool
-        depends on USB_GADGET
         depends on USB_GADGET_DUALSPEED
 
 #
@@ -556,7 +541,6 @@ config USB_GADGET_SUPERSPEED
 #
 choice
         tristate "USB Gadget Drivers"
-        depends on USB_GADGET
         default USB_ETH
         help
           A Linux "Gadget Driver" talks to the USB Peripheral Controller
diff --git a/drivers/usb/gadget/Makefile b/drivers/usb/gadget/Makefile
index b54ac619089..b7f6eefc392 100644
--- a/drivers/usb/gadget/Makefile
+++ b/drivers/usb/gadget/Makefile
@@ -27,7 +27,7 @@ obj-$(CONFIG_USB_S3C_HSOTG)	+= s3c-hsotg.o
 obj-$(CONFIG_USB_S3C_HSUDC)     += s3c-hsudc.o
 obj-$(CONFIG_USB_LANGWELL)      += langwell_udc.o
 obj-$(CONFIG_USB_EG20T)         += pch_udc.o
-obj-$(CONFIG_USB_PXA_U2O)       += mv_udc.o
+obj-$(CONFIG_USB_MV_UDC)        += mv_udc.o
 mv_udc-y                        := mv_udc_core.o
 obj-$(CONFIG_USB_CI13XXX_MSM)   += ci13xxx_msm.o
 obj-$(CONFIG_USB_FUSB300)       += fusb300_udc.o
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 45f422ac103..e9a2c5c4445 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -1959,7 +1959,7 @@ static int amd5536_start(struct usb_gadget_driver *driver,
         u32 tmp;
 
         if (!driver || !bind || !driver->setup
-                        || driver->speed < USB_SPEED_HIGH)
+                        || driver->max_speed < USB_SPEED_HIGH)
                 return -EINVAL;
         if (!dev)
                 return -ENODEV;
@@ -3349,7 +3349,7 @@ static int udc_probe(struct udc *dev)
         dev_set_name(&dev->gadget.dev, "gadget");
         dev->gadget.dev.release = gadget_release;
         dev->gadget.name = name;
-        dev->gadget.is_dualspeed = 1;
+        dev->gadget.max_speed = USB_SPEED_HIGH;
 
         /* init registers, interrupts, ... */
         startup_registers(dev);
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index 8efe0fa9228..ac41f71bf9c 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -1633,7 +1633,7 @@ static int at91_start(struct usb_gadget_driver *driver,
         unsigned long   flags;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->setup) {
                 DBG("bad parameter.\n");
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 271a9d87360..e2fb6d583bd 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1038,7 +1038,7 @@ static struct usba_udc the_udc = {
         .gadget = {
                 .ops            = &usba_udc_ops,
                 .ep_list        = LIST_HEAD_INIT(the_udc.gadget.ep_list),
-                .is_dualspeed   = 1,
+                .max_speed      = USB_SPEED_HIGH,
                 .name           = "atmel_usba_udc",
                 .dev    = {
                         .init_name      = "gadget",
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 9a0c3979ff4..27e31371842 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -182,6 +182,16 @@ static inline int hw_ep_bit(int num, int dir)
         return num + (dir ? 16 : 0);
 }
 
+static int ep_to_bit(int n)
+{
+        int fill = 16 - hw_ep_max / 2;
+
+        if (n >= hw_ep_max / 2)
+                n += fill;
+
+        return n;
+}
+
 /**
  * hw_aread: reads from register bitfield
  * @addr: address relative to bus map
@@ -440,12 +450,13 @@ static int hw_ep_get_halt(int num, int dir)
 /**
  * hw_test_and_clear_setup_status: test & clear setup status (execute without
  *                                 interruption)
- * @n: bit number (endpoint)
+ * @n: endpoint number
  *
  * This function returns setup status
  */
 static int hw_test_and_clear_setup_status(int n)
 {
+        n = ep_to_bit(n);
         return hw_ctest_and_clear(CAP_ENDPTSETUPSTAT, BIT(n));
 }
 
@@ -641,12 +652,13 @@ static int hw_register_write(u16 addr, u32 data)
 /**
  * hw_test_and_clear_complete: test & clear complete status (execute without
  *                             interruption)
- * @n: bit number (endpoint)
+ * @n: endpoint number
  *
  * This function returns complete status
  */
 static int hw_test_and_clear_complete(int n)
 {
+        n = ep_to_bit(n);
         return hw_ctest_and_clear(CAP_ENDPTCOMPLETE, BIT(n));
 }
 
@@ -754,8 +766,11 @@ static ssize_t show_device(struct device *dev, struct device_attribute *attr,
 
         n += scnprintf(buf + n, PAGE_SIZE - n, "speed             = %d\n",
                        gadget->speed);
+        n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed         = %d\n",
+                       gadget->max_speed);
+        /* TODO: Scheduled for removal in 3.8. */
         n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed      = %d\n",
-                       gadget->is_dualspeed);
+                       gadget_is_dualspeed(gadget));
         n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg            = %d\n",
                        gadget->is_otg);
         n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral   = %d\n",
@@ -798,7 +813,7 @@ static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
         n += scnprintf(buf + n, PAGE_SIZE - n, "function  = %s\n",
                        (driver->function ? driver->function : ""));
         n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
-                       driver->speed);
+                       driver->max_speed);
 
         return n;
 }
@@ -2563,9 +2578,7 @@ static int ci13xxx_start(struct usb_gadget_driver *driver,
         if (driver             == NULL ||
             bind               == NULL ||
             driver->setup      == NULL ||
-            driver->disconnect == NULL ||
-            driver->suspend    == NULL ||
-            driver->resume     == NULL)
+            driver->disconnect == NULL)
                 return -EINVAL;
         else if (udc         == NULL)
                 return -ENODEV;
@@ -2693,8 +2706,6 @@ static int ci13xxx_stop(struct usb_gadget_driver *driver)
             driver->unbind     == NULL ||
             driver->setup      == NULL ||
             driver->disconnect == NULL ||
-            driver->suspend    == NULL ||
-            driver->resume     == NULL ||
             driver             != udc->driver)
                 return -EINVAL;
 
@@ -2793,7 +2804,7 @@ static irqreturn_t udc_irq(void)
                         isr_statistics.pci++;
                         udc->gadget.speed = hw_port_is_high_speed() ?
                                 USB_SPEED_HIGH : USB_SPEED_FULL;
-                        if (udc->suspended) {
+                        if (udc->suspended && udc->driver->resume) {
                                 spin_unlock(udc->lock);
                                 udc->driver->resume(&udc->gadget);
                                 spin_lock(udc->lock);
@@ -2807,7 +2818,8 @@ static irqreturn_t udc_irq(void)
                         isr_tr_complete_handler(udc);
                 }
                 if (USBi_SLI & intr) {
-                        if (udc->gadget.speed != USB_SPEED_UNKNOWN) {
+                        if (udc->gadget.speed != USB_SPEED_UNKNOWN &&
+                            udc->driver->suspend) {
                                 udc->suspended = 1;
                                 spin_unlock(udc->lock);
                                 udc->driver->suspend(&udc->gadget);
@@ -2871,7 +2883,7 @@ static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
 
         udc->gadget.ops          = &usb_gadget_ops;
         udc->gadget.speed        = USB_SPEED_UNKNOWN;
-        udc->gadget.is_dualspeed = 1;
+        udc->gadget.max_speed    = USB_SPEED_HIGH;
         udc->gadget.is_otg       = 0;
         udc->gadget.name         = driver->name;
 
diff --git a/drivers/usb/gadget/ci13xxx_udc.h b/drivers/usb/gadget/ci13xxx_udc.h
index 23707775cb4..f4871e1fac5 100644
--- a/drivers/usb/gadget/ci13xxx_udc.h
+++ b/drivers/usb/gadget/ci13xxx_udc.h
@@ -127,7 +127,7 @@ struct ci13xxx {
         struct ci13xxx_ep          ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
         u32                        ep0_dir;    /* ep0 direction */
 #define ep0out ci13xxx_ep[0]
-#define ep0in  ci13xxx_ep[16]
+#define ep0in  ci13xxx_ep[hw_ep_max / 2]
         u8                         remote_wakeup; /* Is remote wakeup feature
                                                         enabled by the host? */
         u8                         suspended;  /* suspended by the host */
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index f71b0787983..a95de6a4a13 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1535,9 +1535,9 @@ composite_resume(struct usb_gadget *gadget)
 
 static struct usb_gadget_driver composite_driver = {
 #ifdef CONFIG_USB_GADGET_SUPERSPEED
-        .speed          = USB_SPEED_SUPER,
+        .max_speed      = USB_SPEED_SUPER,
 #else
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
 #endif
 
         .unbind         = composite_unbind,
@@ -1584,8 +1584,8 @@ int usb_composite_probe(struct usb_composite_driver *driver,
                 driver->iProduct = driver->name;
         composite_driver.function =  (char *) driver->name;
         composite_driver.driver.name = driver->name;
-        composite_driver.speed = min((u8)composite_driver.speed,
-                                     (u8)driver->max_speed);
+        composite_driver.max_speed =
+                min_t(u8, composite_driver.max_speed, driver->max_speed);
         composite = driver;
         composite_gadget_bind = bind;
 
diff --git a/drivers/usb/gadget/dbgp.c b/drivers/usb/gadget/dbgp.c
index 6256420089f..19d7bb0df75 100644
--- a/drivers/usb/gadget/dbgp.c
+++ b/drivers/usb/gadget/dbgp.c
@@ -404,7 +404,7 @@ fail:
 
 static struct usb_gadget_driver dbgp_driver = {
         .function = "dbgp",
-        .speed = USB_SPEED_HIGH,
+        .max_speed = USB_SPEED_HIGH,
         .unbind = dbgp_unbind,
         .setup = dbgp_setup,
         .disconnect = dbgp_disconnect,
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index ab8f1b488d5..db815c2da7e 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -823,19 +823,18 @@ static int dummy_pullup (struct usb_gadget *_gadget, int value)
 
         if (value && dum->driver) {
                 if (mod_data.is_super_speed)
-                        dum->gadget.speed = dum->driver->speed;
+                        dum->gadget.speed = dum->driver->max_speed;
                 else if (mod_data.is_high_speed)
                         dum->gadget.speed = min_t(u8, USB_SPEED_HIGH,
-                                        dum->driver->speed);
+                                        dum->driver->max_speed);
                 else
                         dum->gadget.speed = USB_SPEED_FULL;
                 dummy_udc_udpate_ep0(dum);
 
-                if (dum->gadget.speed < dum->driver->speed)
+                if (dum->gadget.speed < dum->driver->max_speed)
                         dev_dbg(udc_dev(dum), "This device can perform faster"
-                                        " if you connect it to a %s port...\n",
-                                        (dum->driver->speed == USB_SPEED_SUPER ?
-                                         "SuperSpeed" : "HighSpeed"));
+                                " if you connect it to a %s port...\n",
+                                usb_speed_string(dum->driver->max_speed));
         }
         dum_hcd = gadget_to_dummy_hcd(_gadget);
 
@@ -898,7 +897,7 @@ static int dummy_udc_start(struct usb_gadget *g,
         struct dummy_hcd        *dum_hcd = gadget_to_dummy_hcd(g);
         struct dummy            *dum = dum_hcd->dum;
 
-        if (driver->speed == USB_SPEED_UNKNOWN)
+        if (driver->max_speed == USB_SPEED_UNKNOWN)
                 return -EINVAL;
 
         /*
@@ -977,7 +976,7 @@ static int dummy_udc_probe (struct platform_device *pdev)
 
         dum->gadget.name = gadget_name;
         dum->gadget.ops = &dummy_ops;
-        dum->gadget.is_dualspeed = 1;
+        dum->gadget.max_speed = USB_SPEED_SUPER;
 
         dev_set_name(&dum->gadget.dev, "gadget");
         dum->gadget.dev.parent = &pdev->dev;
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 4dff83d2f26..753aa0683ac 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -149,7 +149,7 @@ ep_matches (
         switch (type) {
         case USB_ENDPOINT_XFER_INT:
                 /* INT:  limit 64 bytes full speed, 1024 high/super speed */
-                if (!gadget->is_dualspeed && max > 64)
+                if (!gadget_is_dualspeed(gadget) && max > 64)
                         return 0;
                 /* FALLTHROUGH */
 
@@ -157,12 +157,12 @@ ep_matches (
                 /* ISO:  limit 1023 bytes full speed, 1024 high/super speed */
                 if (ep->maxpacket < max)
                         return 0;
-                if (!gadget->is_dualspeed && max > 1023)
+                if (!gadget_is_dualspeed(gadget) && max > 1023)
                         return 0;
 
                 /* BOTH:  "high bandwidth" works only at high speed */
                 if ((desc->wMaxPacketSize & cpu_to_le16(3<<11))) {
-                        if (!gadget->is_dualspeed)
+                        if (!gadget_is_dualspeed(gadget))
                                 return 0;
                         /* configure your hardware with enough buffering!! */
                 }
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index b5f6f9fef9c..f63dc6c150d 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -1399,7 +1399,7 @@ static int ffs_epfiles_create(struct ffs_data *ffs)
         ENTER();
 
         count = ffs->eps_count;
-        epfiles = kzalloc(count * sizeof *epfiles, GFP_KERNEL);
+        epfiles = kcalloc(count, sizeof(*epfiles), GFP_KERNEL);
         if (!epfiles)
                 return -ENOMEM;
 
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 1a6f415c0d0..6353eca1e85 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -1873,17 +1873,14 @@ static int check_command(struct fsg_common *common, int cmnd_size,
                     common->lun, lun);
 
         /* Check the LUN */
-        if (common->lun < common->nluns) {
-                curlun = &common->luns[common->lun];
-                common->curlun = curlun;
+        curlun = common->curlun;
+        if (curlun) {
                 if (common->cmnd[0] != REQUEST_SENSE) {
                         curlun->sense_data = SS_NO_SENSE;
                         curlun->sense_data_info = 0;
                         curlun->info_valid = 0;
                 }
         } else {
-                common->curlun = NULL;
-                curlun = NULL;
                 common->bad_lun_okay = 0;
 
                 /*
@@ -1929,6 +1926,17 @@ static int check_command(struct fsg_common *common, int cmnd_size,
         return 0;
 }
 
+/* wrapper of check_command for data size in blocks handling */
+static int check_command_size_in_blocks(struct fsg_common *common,
+                int cmnd_size, enum data_direction data_dir,
+                unsigned int mask, int needs_medium, const char *name)
+{
+        if (common->curlun)
+                common->data_size_from_cmnd <<= common->curlun->blkbits;
+        return check_command(common, cmnd_size, data_dir,
+                        mask, needs_medium, name);
+}
+
 static int do_scsi_command(struct fsg_common *common)
 {
         struct fsg_buffhd       *bh;
@@ -2011,9 +2019,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case READ_6:
                 i = common->cmnd[4];
-                common->data_size_from_cmnd = (i == 0 ? 256 : i) <<
-                                common->curlun->blkbits;
-                reply = check_command(common, 6, DATA_DIR_TO_HOST,
+                common->data_size_from_cmnd = (i == 0) ? 256 : i;
+                reply = check_command_size_in_blocks(common, 6,
+                                      DATA_DIR_TO_HOST,
                                       (7<<1) | (1<<4), 1,
                                       "READ(6)");
                 if (reply == 0)
@@ -2022,9 +2030,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case READ_10:
                 common->data_size_from_cmnd =
-                                get_unaligned_be16(&common->cmnd[7]) <<
-                                                common->curlun->blkbits;
-                reply = check_command(common, 10, DATA_DIR_TO_HOST,
+                                get_unaligned_be16(&common->cmnd[7]);
+                reply = check_command_size_in_blocks(common, 10,
+                                      DATA_DIR_TO_HOST,
                                       (1<<1) | (0xf<<2) | (3<<7), 1,
                                       "READ(10)");
                 if (reply == 0)
@@ -2033,9 +2041,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case READ_12:
                 common->data_size_from_cmnd =
-                                get_unaligned_be32(&common->cmnd[6]) <<
-                                                common->curlun->blkbits;
-                reply = check_command(common, 12, DATA_DIR_TO_HOST,
+                                get_unaligned_be32(&common->cmnd[6]);
+                reply = check_command_size_in_blocks(common, 12,
+                                      DATA_DIR_TO_HOST,
                                       (1<<1) | (0xf<<2) | (0xf<<6), 1,
                                       "READ(12)");
                 if (reply == 0)
@@ -2134,9 +2142,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case WRITE_6:
                 i = common->cmnd[4];
-                common->data_size_from_cmnd = (i == 0 ? 256 : i) <<
-                                        common->curlun->blkbits;
-                reply = check_command(common, 6, DATA_DIR_FROM_HOST,
+                common->data_size_from_cmnd = (i == 0) ? 256 : i;
+                reply = check_command_size_in_blocks(common, 6,
+                                      DATA_DIR_FROM_HOST,
                                       (7<<1) | (1<<4), 1,
                                       "WRITE(6)");
                 if (reply == 0)
@@ -2145,9 +2153,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case WRITE_10:
                 common->data_size_from_cmnd =
-                                get_unaligned_be16(&common->cmnd[7]) <<
-                                                common->curlun->blkbits;
-                reply = check_command(common, 10, DATA_DIR_FROM_HOST,
+                                get_unaligned_be16(&common->cmnd[7]);
+                reply = check_command_size_in_blocks(common, 10,
+                                      DATA_DIR_FROM_HOST,
                                       (1<<1) | (0xf<<2) | (3<<7), 1,
                                       "WRITE(10)");
                 if (reply == 0)
@@ -2156,9 +2164,9 @@ static int do_scsi_command(struct fsg_common *common)
 
         case WRITE_12:
                 common->data_size_from_cmnd =
-                                get_unaligned_be32(&common->cmnd[6]) <<
-                                                common->curlun->blkbits;
-                reply = check_command(common, 12, DATA_DIR_FROM_HOST,
+                                get_unaligned_be32(&common->cmnd[6]);
+                reply = check_command_size_in_blocks(common, 12,
+                                      DATA_DIR_FROM_HOST,
                                       (1<<1) | (0xf<<2) | (0xf<<6), 1,
                                       "WRITE(12)");
                 if (reply == 0)
@@ -2273,6 +2281,10 @@ static int received_cbw(struct fsg_dev *fsg, struct fsg_buffhd *bh)
         if (common->data_size == 0)
                 common->data_dir = DATA_DIR_NONE;
         common->lun = cbw->Lun;
+        if (common->lun >= 0 && common->lun < common->nluns)
+                common->curlun = &common->luns[common->lun];
+        else
+                common->curlun = NULL;
         common->tag = cbw->Tag;
         return 0;
 }
@@ -2763,7 +2775,7 @@ static struct fsg_common *fsg_common_init(struct fsg_common *common,
          * Create the LUNs, open their backing files, and register the
          * LUN devices in sysfs.
          */
-        curlun = kzalloc(nluns * sizeof *curlun, GFP_KERNEL);
+        curlun = kcalloc(nluns, sizeof(*curlun), GFP_KERNEL);
         if (unlikely(!curlun)) {
                 rc = -ENOMEM;
                 goto error_release;
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 11b5196284a..e0f30fc70e4 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -2297,19 +2297,17 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
                         DBG(fsg, "using LUN %d from CBW, "
                                         "not LUN %d from CDB\n",
                                         fsg->lun, lun);
-        } else
-                fsg->lun = lun;         // Use LUN from the command
+        }
 
         /* Check the LUN */
-        if (fsg->lun < fsg->nluns) {
-                fsg->curlun = curlun = &fsg->luns[fsg->lun];
+        curlun = fsg->curlun;
+        if (curlun) {
                 if (fsg->cmnd[0] != REQUEST_SENSE) {
                         curlun->sense_data = SS_NO_SENSE;
                         curlun->sense_data_info = 0;
                         curlun->info_valid = 0;
                 }
         } else {
-                fsg->curlun = curlun = NULL;
                 fsg->bad_lun_okay = 0;
 
                 /* INQUIRY and REQUEST SENSE commands are explicitly allowed
@@ -2351,6 +2349,16 @@ static int check_command(struct fsg_dev *fsg, int cmnd_size,
         return 0;
 }
 
+/* wrapper of check_command for data size in blocks handling */
+static int check_command_size_in_blocks(struct fsg_dev *fsg, int cmnd_size,
+                enum data_direction data_dir, unsigned int mask,
+                int needs_medium, const char *name)
+{
+        if (fsg->curlun)
+                fsg->data_size_from_cmnd <<= fsg->curlun->blkbits;
+        return check_command(fsg, cmnd_size, data_dir,
+                        mask, needs_medium, name);
+}
 
 static int do_scsi_command(struct fsg_dev *fsg)
 {
@@ -2425,26 +2433,27 @@ static int do_scsi_command(struct fsg_dev *fsg)
 
         case READ_6:
                 i = fsg->cmnd[4];
-                fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 6, DATA_DIR_TO_HOST,
+                fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+                if ((reply = check_command_size_in_blocks(fsg, 6,
+                                DATA_DIR_TO_HOST,
                                 (7<<1) | (1<<4), 1,
                                 "READ(6)")) == 0)
                         reply = do_read(fsg);
                 break;
 
         case READ_10:
-                fsg->data_size_from_cmnd =
-                                get_unaligned_be16(&fsg->cmnd[7]) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 10, DATA_DIR_TO_HOST,
+                fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+                if ((reply = check_command_size_in_blocks(fsg, 10,
+                                DATA_DIR_TO_HOST,
                                 (1<<1) | (0xf<<2) | (3<<7), 1,
                                 "READ(10)")) == 0)
                         reply = do_read(fsg);
                 break;
 
         case READ_12:
-                fsg->data_size_from_cmnd =
-                                get_unaligned_be32(&fsg->cmnd[6]) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 12, DATA_DIR_TO_HOST,
+                fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+                if ((reply = check_command_size_in_blocks(fsg, 12,
+                                DATA_DIR_TO_HOST,
                                 (1<<1) | (0xf<<2) | (0xf<<6), 1,
                                 "READ(12)")) == 0)
                         reply = do_read(fsg);
@@ -2529,26 +2538,27 @@ static int do_scsi_command(struct fsg_dev *fsg)
 
         case WRITE_6:
                 i = fsg->cmnd[4];
-                fsg->data_size_from_cmnd = (i == 0 ? 256 : i) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 6, DATA_DIR_FROM_HOST,
+                fsg->data_size_from_cmnd = (i == 0) ? 256 : i;
+                if ((reply = check_command_size_in_blocks(fsg, 6,
+                                DATA_DIR_FROM_HOST,
                                 (7<<1) | (1<<4), 1,
                                 "WRITE(6)")) == 0)
                         reply = do_write(fsg);
                 break;
 
         case WRITE_10:
-                fsg->data_size_from_cmnd =
-                                get_unaligned_be16(&fsg->cmnd[7]) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 10, DATA_DIR_FROM_HOST,
+                fsg->data_size_from_cmnd = get_unaligned_be16(&fsg->cmnd[7]);
+                if ((reply = check_command_size_in_blocks(fsg, 10,
+                                DATA_DIR_FROM_HOST,
                                 (1<<1) | (0xf<<2) | (3<<7), 1,
                                 "WRITE(10)")) == 0)
                         reply = do_write(fsg);
                 break;
 
         case WRITE_12:
-                fsg->data_size_from_cmnd =
-                                get_unaligned_be32(&fsg->cmnd[6]) << fsg->curlun->blkbits;
-                if ((reply = check_command(fsg, 12, DATA_DIR_FROM_HOST,
+                fsg->data_size_from_cmnd = get_unaligned_be32(&fsg->cmnd[6]);
+                if ((reply = check_command_size_in_blocks(fsg, 12,
+                                DATA_DIR_FROM_HOST,
                                 (1<<1) | (0xf<<2) | (0xf<<6), 1,
                                 "WRITE(12)")) == 0)
                         reply = do_write(fsg);
@@ -2715,7 +2725,17 @@ static int get_next_command(struct fsg_dev *fsg)
                 memcpy(fsg->cmnd, fsg->cbbuf_cmnd, fsg->cmnd_size);
                 fsg->cbbuf_cmnd_size = 0;
                 spin_unlock_irq(&fsg->lock);
+
+                /* Use LUN from the command */
+                fsg->lun = fsg->cmnd[1] >> 5;
         }
+
+        /* Update current lun */
+        if (fsg->lun >= 0 && fsg->lun < fsg->nluns)
+                fsg->curlun = &fsg->luns[fsg->lun];
+        else
+                fsg->curlun = NULL;
+
         return rc;
 }
 
@@ -3584,7 +3604,7 @@ static void fsg_resume(struct usb_gadget *gadget)
 /*-------------------------------------------------------------------------*/
 
 static struct usb_gadget_driver         fsg_driver = {
-        .speed          = USB_SPEED_SUPER,
+        .max_speed      = USB_SPEED_SUPER,
         .function       = (char *) fsg_string_product,
         .unbind         = fsg_unbind,
         .disconnect     = fsg_disconnect,
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index e00cf92409c..b95697c03d0 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -2336,7 +2336,7 @@ static int fsl_qe_start(struct usb_gadget_driver *driver,
         if (!udc_controller)
                 return -ENODEV;
 
-        if (!driver || driver->speed < USB_SPEED_FULL
+        if (!driver || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->disconnect || !driver->setup)
                 return -EINVAL;
 
@@ -2350,7 +2350,7 @@ static int fsl_qe_start(struct usb_gadget_driver *driver,
         /* hook up the driver */
         udc_controller->driver = driver;
         udc_controller->gadget.dev.driver = &driver->driver;
-        udc_controller->gadget.speed = (enum usb_device_speed)(driver->speed);
+        udc_controller->gadget.speed = driver->max_speed;
         spin_unlock_irqrestore(&udc_controller->lock, flags);
 
         retval = bind(&udc_controller->gadget);
@@ -2814,20 +2814,7 @@ static struct platform_driver udc_driver = {
 #endif
 };
 
-static int __init qe_udc_init(void)
-{
-        printk(KERN_INFO "%s: %s, %s\n", driver_name, driver_desc,
-                        DRIVER_VERSION);
-        return platform_driver_register(&udc_driver);
-}
-
-static void __exit qe_udc_exit(void)
-{
-        platform_driver_unregister(&udc_driver);
-}
-
-module_init(qe_udc_init);
-module_exit(qe_udc_exit);
+module_platform_driver(udc_driver);
 
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR(DRIVER_AUTHOR);
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index dd28ef3def7..d7ea6c076ce 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -1934,7 +1934,7 @@ static int fsl_start(struct usb_gadget_driver *driver,
         if (!udc_controller)
                 return -ENODEV;
 
-        if (!driver || driver->speed < USB_SPEED_FULL
+        if (!driver || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->disconnect || !driver->setup)
                 return -EINVAL;
 
@@ -2525,7 +2525,7 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 
         /* Setup gadget structure */
         udc_controller->gadget.ops = &fsl_gadget_ops;
-        udc_controller->gadget.is_dualspeed = 1;
+        udc_controller->gadget.max_speed = USB_SPEED_HIGH;
         udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
         INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
         udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 74da206c840..5831cb4a0b3 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -1317,7 +1317,7 @@ static int fusb300_udc_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->setup)
                 return -EINVAL;
@@ -1463,7 +1463,7 @@ static int __init fusb300_probe(struct platform_device *pdev)
 
         dev_set_name(&fusb300->gadget.dev, "gadget");
 
-        fusb300->gadget.is_dualspeed = 1;
+        fusb300->gadget.max_speed = USB_SPEED_HIGH;
         fusb300->gadget.dev.parent = &pdev->dev;
         fusb300->gadget.dev.dma_mask = pdev->dev.dma_mask;
         fusb300->gadget.dev.release = pdev->dev.release;
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c
index 7f87805cddc..5af70fcce13 100644
--- a/drivers/usb/gadget/goku_udc.c
+++ b/drivers/usb/gadget/goku_udc.c
@@ -1357,7 +1357,7 @@ static int goku_start(struct usb_gadget_driver *driver,
         int                     retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->disconnect
                         || !driver->setup)
@@ -1796,6 +1796,7 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         spin_lock_init(&dev->lock);
         dev->pdev = pdev;
         dev->gadget.ops = &goku_ops;
+        dev->gadget.max_speed = USB_SPEED_FULL;
 
         /* the "gadget" abstracts/virtualizes the controller */
         dev_set_name(&dev->gadget.dev, "gadget");
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 2d978c0e7ce..8d1c75abd73 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -1336,7 +1336,7 @@ static int imx_udc_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                || driver->speed < USB_SPEED_FULL
+                || driver->max_speed < USB_SPEED_FULL
                 || !bind
                 || !driver->disconnect
                 || !driver->setup)
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 6b7ea25af0f..ae04266dba1 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1766,9 +1766,9 @@ gadgetfs_suspend (struct usb_gadget *gadget)
 
 static struct usb_gadget_driver gadgetfs_driver = {
 #ifdef  CONFIG_USB_GADGET_DUALSPEED
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
 #else
-        .speed          = USB_SPEED_FULL,
+        .max_speed      = USB_SPEED_FULL,
 #endif
         .function       = (char *) driver_desc,
         .unbind         = gadgetfs_unbind,
@@ -1792,7 +1792,7 @@ static int gadgetfs_probe (struct usb_gadget *gadget)
 }
 
 static struct usb_gadget_driver probe_driver = {
-        .speed          = USB_SPEED_HIGH,
+        .max_speed      = USB_SPEED_HIGH,
         .unbind         = gadgetfs_nop,
         .setup          = (void *)gadgetfs_nop,
         .disconnect     = gadgetfs_nop,
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index c9fa3bf5b37..fa0fcc11263 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -3267,7 +3267,7 @@ static int langwell_udc_probe(struct pci_dev *pdev,
         dev->gadget.ep0 = &dev->ep[0].ep;       /* gadget ep0 */
         INIT_LIST_HEAD(&dev->gadget.ep_list);   /* ep_list */
         dev->gadget.speed = USB_SPEED_UNKNOWN;  /* speed */
-        dev->gadget.is_dualspeed = 1;           /* support dual speed */
+        dev->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */
 #ifdef  OTG_TRANSCEIVER
         dev->gadget.is_otg = 1;                 /* support otg mode */
 #endif
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 9aa1cbbee45..3608b3bd573 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1472,7 +1472,7 @@ static int m66592_start(struct usb_gadget_driver *driver,
         int retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_HIGH
+                        || driver->max_speed < USB_SPEED_HIGH
                         || !bind
                         || !driver->setup)
                 return -EINVAL;
@@ -1653,7 +1653,7 @@ static int __init m66592_probe(struct platform_device *pdev)
         m66592->gadget.ops = &m66592_gadget_ops;
         device_initialize(&m66592->gadget.dev);
         dev_set_name(&m66592->gadget.dev, "gadget");
-        m66592->gadget.is_dualspeed = 1;
+        m66592->gadget.max_speed = USB_SPEED_HIGH;
         m66592->gadget.dev.parent = &pdev->dev;
         m66592->gadget.dev.dma_mask = pdev->dev.dma_mask;
         m66592->gadget.dev.release = pdev->dev.release;
diff --git a/drivers/usb/gadget/mv_udc.h b/drivers/usb/gadget/mv_udc.h
index daa75c12f33..34aadfae723 100644
--- a/drivers/usb/gadget/mv_udc.h
+++ b/drivers/usb/gadget/mv_udc.h
@@ -180,7 +180,7 @@ struct mv_udc {
 
         struct mv_cap_regs __iomem      *cap_regs;
         struct mv_op_regs __iomem       *op_regs;
-        unsigned int                    phy_regs;
+        void __iomem                    *phy_regs;
         unsigned int                    max_eps;
         struct mv_dqh                   *ep_dqh;
         size_t                          ep_dqh_size;
@@ -211,11 +211,14 @@ struct mv_udc {
                                 softconnected:1,
                                 force_fs:1,
                                 clock_gating:1,
-                                active:1;
+                                active:1,
+                                stopped:1;      /* stop bit is setted */
 
         struct work_struct      vbus_work;
         struct workqueue_struct *qwork;
 
+        struct otg_transceiver  *transceiver;
+
         struct mv_usb_platform_data     *pdata;
 
         /* some SOC has mutiple clock sources for USB*/
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index 892412103dd..f97e737d26f 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -276,11 +276,12 @@ static void done(struct mv_ep *ep, struct mv_req *req, int status)
 
 static int queue_dtd(struct mv_ep *ep, struct mv_req *req)
 {
-        u32 tmp, epstatus, bit_pos, direction;
         struct mv_udc *udc;
         struct mv_dqh *dqh;
+        u32 bit_pos, direction;
+        u32 usbcmd, epstatus;
         unsigned int loops;
-        int readsafe, retval = 0;
+        int retval = 0;
 
         udc = ep->udc;
         direction = ep_dir(ep);
@@ -293,30 +294,18 @@ static int queue_dtd(struct mv_ep *ep, struct mv_req *req)
                 lastreq = list_entry(ep->queue.prev, struct mv_req, queue);
                 lastreq->tail->dtd_next =
                         req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
-                if (readl(&udc->op_regs->epprime) & bit_pos) {
-                        loops = LOOPS(PRIME_TIMEOUT);
-                        while (readl(&udc->op_regs->epprime) & bit_pos) {
-                                if (loops == 0) {
-                                        retval = -ETIME;
-                                        goto done;
-                                }
-                                udelay(LOOPS_USEC);
-                                loops--;
-                        }
-                        if (readl(&udc->op_regs->epstatus) & bit_pos)
-                                goto done;
-                }
-                readsafe = 0;
+
+                wmb();
+
+                if (readl(&udc->op_regs->epprime) & bit_pos)
+                        goto done;
+
                 loops = LOOPS(READSAFE_TIMEOUT);
-                while (readsafe == 0) {
-                        if (loops == 0) {
-                                retval = -ETIME;
-                                goto done;
-                        }
+                while (1) {
                         /* start with setting the semaphores */
-                        tmp = readl(&udc->op_regs->usbcmd);
-                        tmp |= USBCMD_ATDTW_TRIPWIRE_SET;
-                        writel(tmp, &udc->op_regs->usbcmd);
+                        usbcmd = readl(&udc->op_regs->usbcmd);
+                        usbcmd |= USBCMD_ATDTW_TRIPWIRE_SET;
+                        writel(usbcmd, &udc->op_regs->usbcmd);
 
                         /* read the endpoint status */
                         epstatus = readl(&udc->op_regs->epstatus) & bit_pos;
@@ -329,98 +318,46 @@ static int queue_dtd(struct mv_ep *ep, struct mv_req *req)
                          * primed.
                          */
                         if (readl(&udc->op_regs->usbcmd)
-                                & USBCMD_ATDTW_TRIPWIRE_SET) {
-                                readsafe = 1;
-                        }
+                                & USBCMD_ATDTW_TRIPWIRE_SET)
+                                break;
+
                         loops--;
+                        if (loops == 0) {
+                                dev_err(&udc->dev->dev,
+                                        "Timeout for ATDTW_TRIPWIRE...\n");
+                                retval = -ETIME;
+                                goto done;
+                        }
                         udelay(LOOPS_USEC);
                 }
 
                 /* Clear the semaphore */
-                tmp = readl(&udc->op_regs->usbcmd);
-                tmp &= USBCMD_ATDTW_TRIPWIRE_CLEAR;
-                writel(tmp, &udc->op_regs->usbcmd);
-
-                /* If endpoint is not active, we activate it now. */
-                if (!epstatus) {
-                        if (direction == EP_DIR_IN) {
-                                struct mv_dtd *curr_dtd = dma_to_virt(
-                                        &udc->dev->dev, dqh->curr_dtd_ptr);
-
-                                loops = LOOPS(DTD_TIMEOUT);
-                                while (curr_dtd->size_ioc_sts
-                                        & DTD_STATUS_ACTIVE) {
-                                        if (loops == 0) {
-                                                retval = -ETIME;
-                                                goto done;
-                                        }
-                                        loops--;
-                                        udelay(LOOPS_USEC);
-                                }
-                        }
-                        /* No other transfers on the queue */
+                usbcmd = readl(&udc->op_regs->usbcmd);
+                usbcmd &= USBCMD_ATDTW_TRIPWIRE_CLEAR;
+                writel(usbcmd, &udc->op_regs->usbcmd);
 
-                        /* Write dQH next pointer and terminate bit to 0 */
-                        dqh->next_dtd_ptr = req->head->td_dma
-                                & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
-                        dqh->size_ioc_int_sts = 0;
+                if (epstatus)
+                        goto done;
+        }
 
-                        /*
-                         * Ensure that updates to the QH will
-                         * occur before priming.
-                         */
-                        wmb();
+        /* Write dQH next pointer and terminate bit to 0 */
+        dqh->next_dtd_ptr = req->head->td_dma
+                                & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
 
-                        /* Prime the Endpoint */
-                        writel(bit_pos, &udc->op_regs->epprime);
-                }
-        } else {
-                /* Write dQH next pointer and terminate bit to 0 */
-                dqh->next_dtd_ptr = req->head->td_dma
-                        & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
-                dqh->size_ioc_int_sts = 0;
+        /* clear active and halt bit, in case set from a previous error */
+        dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED);
 
-                /* Ensure that updates to the QH will occur before priming. */
-                wmb();
+        /* Ensure that updates to the QH will occure before priming. */
+        wmb();
 
-                /* Prime the Endpoint */
-                writel(bit_pos, &udc->op_regs->epprime);
+        /* Prime the Endpoint */
+        writel(bit_pos, &udc->op_regs->epprime);
 
-                if (direction == EP_DIR_IN) {
-                        /* FIXME add status check after prime the IN ep */
-                        int prime_again;
-                        u32 curr_dtd_ptr = dqh->curr_dtd_ptr;
-
-                        loops = LOOPS(DTD_TIMEOUT);
-                        prime_again = 0;
-                        while ((curr_dtd_ptr != req->head->td_dma)) {
-                                curr_dtd_ptr = dqh->curr_dtd_ptr;
-                                if (loops == 0) {
-                                        dev_err(&udc->dev->dev,
-                                                "failed to prime %s\n",
-                                                ep->name);
-                                        retval = -ETIME;
-                                        goto done;
-                                }
-                                loops--;
-                                udelay(LOOPS_USEC);
-
-                                if (loops == (LOOPS(DTD_TIMEOUT) >> 2)) {
-                                        if (prime_again)
-                                                goto done;
-                                        dev_info(&udc->dev->dev,
-                                                "prime again\n");
-                                        writel(bit_pos,
-                                                &udc->op_regs->epprime);
-                                        prime_again = 1;
-                                }
-                        }
-                }
-        }
 done:
         return retval;
 }
 
+
 static struct mv_dtd *build_dtd(struct mv_req *req, unsigned *length,
                 dma_addr_t *dma, int *is_last)
 {
@@ -841,6 +778,27 @@ mv_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
         return 0;
 }
 
+static void mv_prime_ep(struct mv_ep *ep, struct mv_req *req)
+{
+        struct mv_dqh *dqh = ep->dqh;
+        u32 bit_pos;
+
+        /* Write dQH next pointer and terminate bit to 0 */
+        dqh->next_dtd_ptr = req->head->td_dma
+                & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
+
+        /* clear active and halt bit, in case set from a previous error */
+        dqh->size_ioc_int_sts &= ~(DTD_STATUS_ACTIVE | DTD_STATUS_HALTED);
+
+        /* Ensure that updates to the QH will occure before priming. */
+        wmb();
+
+        bit_pos = 1 << (((ep_dir(ep) == EP_DIR_OUT) ? 0 : 16) + ep->ep_num);
+
+        /* Prime the Endpoint */
+        writel(bit_pos, &ep->udc->op_regs->epprime);
+}
+
 /* dequeues (cancels, unlinks) an I/O request from an endpoint */
 static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 {
@@ -883,15 +841,13 @@ static int mv_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
 
                 /* The request isn't the last request in this ep queue */
                 if (req->queue.next != &ep->queue) {
-                        struct mv_dqh *qh;
                         struct mv_req *next_req;
 
-                        qh = ep->dqh;
-                        next_req = list_entry(req->queue.next, struct mv_req,
-                                        queue);
+                        next_req = list_entry(req->queue.next,
+                                struct mv_req, queue);
 
                         /* Point the QH to the first TD of next request */
-                        writel((u32) next_req->head, &qh->curr_dtd_ptr);
+                        mv_prime_ep(ep, next_req);
                 } else {
                         struct mv_dqh *qh;
 
@@ -1056,6 +1012,8 @@ static void udc_stop(struct mv_udc *udc)
                 USBINTR_PORT_CHANGE_DETECT_EN | USBINTR_RESET_EN);
         writel(tmp, &udc->op_regs->usbintr);
 
+        udc->stopped = 1;
+
         /* Reset the Run the bit in the command register to stop VUSB */
         tmp = readl(&udc->op_regs->usbcmd);
         tmp &= ~USBCMD_RUN_STOP;
@@ -1072,6 +1030,8 @@ static void udc_start(struct mv_udc *udc)
         /* Enable interrupts */
         writel(usbintr, &udc->op_regs->usbintr);
 
+        udc->stopped = 0;
+
         /* Set the Run bit in the command register */
         writel(USBCMD_RUN_STOP, &udc->op_regs->usbcmd);
 }
@@ -1134,11 +1094,11 @@ static int udc_reset(struct mv_udc *udc)
         return 0;
 }
 
-static int mv_udc_enable(struct mv_udc *udc)
+static int mv_udc_enable_internal(struct mv_udc *udc)
 {
         int retval;
 
-        if (udc->clock_gating == 0 || udc->active)
+        if (udc->active)
                 return 0;
 
         dev_dbg(&udc->dev->dev, "enable udc\n");
@@ -1157,9 +1117,17 @@ static int mv_udc_enable(struct mv_udc *udc)
         return 0;
 }
 
-static void mv_udc_disable(struct mv_udc *udc)
+static int mv_udc_enable(struct mv_udc *udc)
 {
-        if (udc->clock_gating && udc->active) {
+        if (udc->clock_gating)
+                return mv_udc_enable_internal(udc);
+
+        return 0;
+}
+
+static void mv_udc_disable_internal(struct mv_udc *udc)
+{
+        if (udc->active) {
                 dev_dbg(&udc->dev->dev, "disable udc\n");
                 if (udc->pdata->phy_deinit)
                         udc->pdata->phy_deinit(udc->phy_regs);
@@ -1168,6 +1136,12 @@ static void mv_udc_disable(struct mv_udc *udc)
         }
 }
 
+static void mv_udc_disable(struct mv_udc *udc)
+{
+        if (udc->clock_gating)
+                mv_udc_disable_internal(udc);
+}
+
 static int mv_udc_get_frame(struct usb_gadget *gadget)
 {
         struct mv_udc *udc;
@@ -1178,7 +1152,7 @@ static int mv_udc_get_frame(struct usb_gadget *gadget)
 
         udc = container_of(gadget, struct mv_udc, gadget);
 
-        retval = readl(udc->op_regs->frindex) & USB_FRINDEX_MASKS;
+        retval = readl(&udc->op_regs->frindex) & USB_FRINDEX_MASKS;
 
         return retval;
 }
@@ -1212,10 +1186,11 @@ static int mv_udc_vbus_session(struct usb_gadget *gadget, int is_active)
         udc = container_of(gadget, struct mv_udc, gadget);
         spin_lock_irqsave(&udc->lock, flags);
 
+        udc->vbus_active = (is_active != 0);
+
         dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n",
                 __func__, udc->softconnect, udc->vbus_active);
 
-        udc->vbus_active = (is_active != 0);
         if (udc->driver && udc->softconnect && udc->vbus_active) {
                 retval = mv_udc_enable(udc);
                 if (retval == 0) {
@@ -1244,10 +1219,11 @@ static int mv_udc_pullup(struct usb_gadget *gadget, int is_on)
         udc = container_of(gadget, struct mv_udc, gadget);
         spin_lock_irqsave(&udc->lock, flags);
 
+        udc->softconnect = (is_on != 0);
+
         dev_dbg(&udc->dev->dev, "%s: softconnect %d, vbus_active %d\n",
                         __func__, udc->softconnect, udc->vbus_active);
 
-        udc->softconnect = (is_on != 0);
         if (udc->driver && udc->softconnect && udc->vbus_active) {
                 retval = mv_udc_enable(udc);
                 if (retval == 0) {
@@ -1407,6 +1383,20 @@ static int mv_udc_start(struct usb_gadget_driver *driver,
                 return retval;
         }
 
+        if (udc->transceiver) {
+                retval = otg_set_peripheral(udc->transceiver, &udc->gadget);
+                if (retval) {
+                        dev_err(&udc->dev->dev,
+                                "unable to register peripheral to otg\n");
+                        if (driver->unbind) {
+                                driver->unbind(&udc->gadget);
+                                udc->gadget.dev.driver = NULL;
+                                udc->driver = NULL;
+                        }
+                        return retval;
+                }
+        }
+
         /* pullup is always on */
         mv_udc_pullup(&udc->gadget, 1);
 
@@ -2026,6 +2016,10 @@ static irqreturn_t mv_udc_irq(int irq, void *dev)
         struct mv_udc *udc = (struct mv_udc *)dev;
         u32 status, intr;
 
+        /* Disable ISR when stopped bit is set */
+        if (udc->stopped)
+                return IRQ_NONE;
+
         spin_lock(&udc->lock);
 
         status = readl(&udc->op_regs->usbsts);
@@ -2109,7 +2103,12 @@ static int __devexit mv_udc_remove(struct platform_device *dev)
                 destroy_workqueue(udc->qwork);
         }
 
-        if (udc->pdata && udc->pdata->vbus && udc->clock_gating)
+        /*
+         * If we have transceiver inited,
+         * then vbus irq will not be requested in udc driver.
+         */
+        if (udc->pdata && udc->pdata->vbus
+                && udc->clock_gating && udc->transceiver == NULL)
                 free_irq(udc->pdata->vbus->irq, &dev->dev);
 
         /* free memory allocated in probe */
@@ -2129,11 +2128,9 @@ static int __devexit mv_udc_remove(struct platform_device *dev)
 
         if (udc->cap_regs)
                 iounmap(udc->cap_regs);
-        udc->cap_regs = NULL;
 
         if (udc->phy_regs)
-                iounmap((void *)udc->phy_regs);
-        udc->phy_regs = 0;
+                iounmap(udc->phy_regs);
 
         if (udc->status_req) {
                 kfree(udc->status_req->req.buf);
@@ -2182,6 +2179,11 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
 
         udc->dev = dev;
 
+#ifdef CONFIG_USB_OTG_UTILS
+        if (pdata->mode == MV_USB_MODE_OTG)
+                udc->transceiver = otg_get_transceiver();
+#endif
+
         udc->clknum = pdata->clknum;
         for (clk_i = 0; clk_i < udc->clknum; clk_i++) {
                 udc->clk[clk_i] = clk_get(&dev->dev, pdata->clkname[clk_i]);
@@ -2213,24 +2215,20 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
                 goto err_iounmap_capreg;
         }
 
-        udc->phy_regs = (unsigned int)ioremap(r->start, resource_size(r));
-        if (udc->phy_regs == 0) {
+        udc->phy_regs = ioremap(r->start, resource_size(r));
+        if (udc->phy_regs == NULL) {
                 dev_err(&dev->dev, "failed to map phy I/O memory\n");
                 retval = -EBUSY;
                 goto err_iounmap_capreg;
         }
 
         /* we will acces controller register, so enable the clk */
-        udc_clock_enable(udc);
-        if (pdata->phy_init) {
-                retval = pdata->phy_init(udc->phy_regs);
-                if (retval) {
-                        dev_err(&dev->dev, "phy init error %d\n", retval);
-                        goto err_iounmap_phyreg;
-                }
-        }
+        retval = mv_udc_enable_internal(udc);
+        if (retval)
+                goto err_iounmap_phyreg;
 
-        udc->op_regs = (struct mv_op_regs __iomem *)((u32)udc->cap_regs
+        udc->op_regs =
+                (struct mv_op_regs __iomem *)((unsigned long)udc->cap_regs
                 + (readl(&udc->cap_regs->caplength_hciversion)
                         & CAPLENGTH_MASK));
         udc->max_eps = readl(&udc->cap_regs->dccparams) & DCCPARAMS_DEN_MASK;
@@ -2312,7 +2310,7 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
         udc->gadget.ep0 = &udc->eps[0].ep;      /* gadget ep0 */
         INIT_LIST_HEAD(&udc->gadget.ep_list);   /* ep_list */
         udc->gadget.speed = USB_SPEED_UNKNOWN;  /* speed */
-        udc->gadget.is_dualspeed = 1;           /* support dual speed */
+        udc->gadget.max_speed = USB_SPEED_HIGH; /* support dual speed */
 
         /* the "gadget" abstracts/virtualizes the controller */
         dev_set_name(&udc->gadget.dev, "gadget");
@@ -2328,7 +2326,9 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
         eps_init(udc);
 
         /* VBUS detect: we can disable/enable clock on demand.*/
-        if (pdata->vbus) {
+        if (udc->transceiver)
+                udc->clock_gating = 1;
+        else if (pdata->vbus) {
                 udc->clock_gating = 1;
                 retval = request_threaded_irq(pdata->vbus->irq, NULL,
                                 mv_udc_vbus_irq, IRQF_ONESHOT, "vbus", udc);
@@ -2354,11 +2354,9 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
          * If not, it means that VBUS detection is not supported, we
          * have to enable vbus active all the time to let controller work.
          */
-        if (udc->clock_gating) {
-                if (udc->pdata->phy_deinit)
-                        udc->pdata->phy_deinit(udc->phy_regs);
-                udc_clock_disable(udc);
-        } else
+        if (udc->clock_gating)
+                mv_udc_disable_internal(udc);
+        else
                 udc->vbus_active = 1;
 
         retval = usb_add_gadget_udc(&dev->dev, &udc->gadget);
@@ -2371,7 +2369,8 @@ static int __devinit mv_udc_probe(struct platform_device *dev)
         return 0;
 
 err_unregister:
-        if (udc->pdata && udc->pdata->vbus && udc->clock_gating)
+        if (udc->pdata && udc->pdata->vbus
+                && udc->clock_gating && udc->transceiver == NULL)
                 free_irq(pdata->vbus->irq, &dev->dev);
         device_unregister(&udc->gadget.dev);
 err_free_irq:
@@ -2387,11 +2386,9 @@ err_free_dma:
         dma_free_coherent(&dev->dev, udc->ep_dqh_size,
                         udc->ep_dqh, udc->ep_dqh_dma);
 err_disable_clock:
-        if (udc->pdata->phy_deinit)
-                udc->pdata->phy_deinit(udc->phy_regs);
-        udc_clock_disable(udc);
+        mv_udc_disable_internal(udc);
 err_iounmap_phyreg:
-        iounmap((void *)udc->phy_regs);
+        iounmap(udc->phy_regs);
 err_iounmap_capreg:
         iounmap(udc->cap_regs);
 err_put_clk:
@@ -2407,7 +2404,30 @@ static int mv_udc_suspend(struct device *_dev)
 {
         struct mv_udc *udc = the_controller;
 
-        udc_stop(udc);
+        /* if OTG is enabled, the following will be done in OTG driver*/
+        if (udc->transceiver)
+                return 0;
+
+        if (udc->pdata->vbus && udc->pdata->vbus->poll)
+                if (udc->pdata->vbus->poll() == VBUS_HIGH) {
+                        dev_info(&udc->dev->dev, "USB cable is connected!\n");
+                        return -EAGAIN;
+                }
+
+        /*
+         * only cable is unplugged, udc can suspend.
+         * So do not care about clock_gating == 1.
+         */
+        if (!udc->clock_gating) {
+                udc_stop(udc);
+
+                spin_lock_irq(&udc->lock);
+                /* stop all usb activities */
+                stop_activity(udc, udc->driver);
+                spin_unlock_irq(&udc->lock);
+
+                mv_udc_disable_internal(udc);
+        }
 
         return 0;
 }
@@ -2417,20 +2437,22 @@ static int mv_udc_resume(struct device *_dev)
         struct mv_udc *udc = the_controller;
         int retval;
 
-        if (udc->pdata->phy_init) {
-                retval = udc->pdata->phy_init(udc->phy_regs);
-                if (retval) {
-                        dev_err(&udc->dev->dev,
-                                "init phy error %d when resume back\n",
-                                retval);
+        /* if OTG is enabled, the following will be done in OTG driver*/
+        if (udc->transceiver)
+                return 0;
+
+        if (!udc->clock_gating) {
+                retval = mv_udc_enable_internal(udc);
+                if (retval)
                         return retval;
+
+                if (udc->driver && udc->softconnect) {
+                        udc_reset(udc);
+                        ep0_reset(udc);
+                        udc_start(udc);
                 }
         }
 
-        udc_reset(udc);
-        ep0_reset(udc);
-        udc_start(udc);
-
         return 0;
 }
 
@@ -2457,30 +2479,16 @@ static struct platform_driver udc_driver = {
         .shutdown       = mv_udc_shutdown,
         .driver         = {
                 .owner  = THIS_MODULE,
-                .name   = "pxa-u2o",
+                .name   = "mv-udc",
 #ifdef CONFIG_PM
                 .pm     = &mv_udc_pm_ops,
 #endif
         },
 };
-MODULE_ALIAS("platform:pxa-u2o");
 
+module_platform_driver(udc_driver);
+MODULE_ALIAS("platform:mv-udc");
 MODULE_DESCRIPTION(DRIVER_DESC);
 MODULE_AUTHOR("Chao Xie <chao.xie@marvell.com>");
 MODULE_VERSION(DRIVER_VERSION);
 MODULE_LICENSE("GPL");
-
-
-static int __init init(void)
-{
-        return platform_driver_register(&udc_driver);
-}
-module_init(init);
-
-
-static void __exit cleanup(void)
-{
-        platform_driver_unregister(&udc_driver);
-}
-module_exit(cleanup);
-
diff --git a/drivers/usb/gadget/net2272.c b/drivers/usb/gadget/net2272.c
index d1b76368472..4c81d540bc2 100644
--- a/drivers/usb/gadget/net2272.c
+++ b/drivers/usb/gadget/net2272.c
@@ -1459,7 +1459,7 @@ static int net2272_start(struct usb_gadget *_gadget,
         unsigned i;
 
         if (!driver || !driver->unbind || !driver->setup ||
-            driver->speed != USB_SPEED_HIGH)
+            driver->max_speed != USB_SPEED_HIGH)
                 return -EINVAL;
 
         dev = container_of(_gadget, struct net2272, gadget);
@@ -2235,7 +2235,7 @@ net2272_probe_init(struct device *dev, unsigned int irq)
         ret->irq = irq;
         ret->dev = dev;
         ret->gadget.ops = &net2272_ops;
-        ret->gadget.is_dualspeed = 1;
+        ret->gadget.max_speed = USB_SPEED_HIGH;
 
         /* the "gadget" abstracts/virtualizes the controller */
         dev_set_name(&ret->gadget.dev, "gadget");
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index da2b9d0be3c..cf1f36454d0 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1881,7 +1881,7 @@ static int net2280_start(struct usb_gadget *_gadget,
          * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE)
          * "must not be used in normal operation"
          */
-        if (!driver || driver->speed < USB_SPEED_HIGH
+        if (!driver || driver->max_speed < USB_SPEED_HIGH
                         || !driver->setup)
                 return -EINVAL;
 
@@ -2698,7 +2698,7 @@ static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id)
         spin_lock_init (&dev->lock);
         dev->pdev = pdev;
         dev->gadget.ops = &net2280_ops;
-        dev->gadget.is_dualspeed = 1;
+        dev->gadget.max_speed = USB_SPEED_HIGH;
 
         /* the "gadget" abstracts/virtualizes the controller */
         dev_set_name(&dev->gadget.dev, "gadget");
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index 788989a1022..7db5bbe6251 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -2110,7 +2110,7 @@ static int omap_udc_start(struct usb_gadget_driver *driver,
                 return -ENODEV;
         if (!driver
                         // FIXME if otg, check:  driver->is_otg
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind || !driver->setup)
                 return -EINVAL;
 
@@ -2676,6 +2676,7 @@ omap_udc_setup(struct platform_device *odev, struct otg_transceiver *xceiv)
         INIT_LIST_HEAD(&udc->gadget.ep_list);
         INIT_LIST_HEAD(&udc->iso);
         udc->gadget.speed = USB_SPEED_UNKNOWN;
+        udc->gadget.max_speed = USB_SPEED_FULL;
         udc->gadget.name = driver_name;
 
         device_initialize(&udc->gadget.dev);
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index 5048a0c0764..dd2313cce1d 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -2693,7 +2693,7 @@ static int pch_udc_start(struct usb_gadget_driver *driver,
         struct pch_udc_dev      *dev = pch_udc;
         int                     retval;
 
-        if (!driver || (driver->speed == USB_SPEED_UNKNOWN) || !bind ||
+        if (!driver || (driver->max_speed == USB_SPEED_UNKNOWN) || !bind ||
             !driver->setup || !driver->unbind || !driver->disconnect) {
                 dev_err(&dev->pdev->dev,
                         "%s: invalid driver parameter\n", __func__);
@@ -2941,7 +2941,7 @@ static int pch_udc_probe(struct pci_dev *pdev,
         dev->gadget.dev.dma_mask = pdev->dev.dma_mask;
         dev->gadget.dev.release = gadget_release;
         dev->gadget.name = KBUILD_MODNAME;
-        dev->gadget.is_dualspeed = 1;
+        dev->gadget.max_speed = USB_SPEED_HIGH;
 
         retval = device_register(&dev->gadget.dev);
         if (retval)
diff --git a/drivers/usb/gadget/printer.c b/drivers/usb/gadget/printer.c
index 65a8834f274..d83134b0f78 100644
--- a/drivers/usb/gadget/printer.c
+++ b/drivers/usb/gadget/printer.c
@@ -1141,7 +1141,7 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
                                 break;
 #ifdef CONFIG_USB_GADGET_DUALSPEED
                         case USB_DT_DEVICE_QUALIFIER:
-                                if (!gadget->is_dualspeed)
+                                if (!gadget_is_dualspeed(gadget))
                                         break;
                                 /*
                                  * assumes ep0 uses the same value for both
@@ -1155,7 +1155,7 @@ printer_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
                                 break;
 
                         case USB_DT_OTHER_SPEED_CONFIG:
-                                if (!gadget->is_dualspeed)
+                                if (!gadget_is_dualspeed(gadget))
                                         break;
                                 /* FALLTHROUGH */
 #endif /* CONFIG_USB_GADGET_DUALSPEED */
@@ -1535,7 +1535,7 @@ fail:
 /*-------------------------------------------------------------------------*/
 
 static struct usb_gadget_driver printer_driver = {
-        .speed          = DEVSPEED,
+        .max_speed      = DEVSPEED,
 
         .function       = (char *) driver_desc,
         .unbind         = printer_unbind,
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index c090a7e3ecf..dd470635f4f 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -1264,7 +1264,7 @@ static int pxa25x_start(struct usb_gadget_driver *driver,
         int                     retval;
 
         if (!driver
-                        || driver->speed < USB_SPEED_FULL
+                        || driver->max_speed < USB_SPEED_FULL
                         || !bind
                         || !driver->disconnect
                         || !driver->setup)
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 18b6b091f2a..f4c44eb806c 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1807,7 +1807,7 @@ static int pxa27x_udc_start(struct usb_gadget_driver *driver,
         struct pxa_udc *udc = the_controller;
         int retval;
 
-        if (!driver || driver->speed < USB_SPEED_FULL || !bind
+        if (!driver || driver->max_speed < USB_SPEED_FULL || !bind
                         || !driver->disconnect || !driver->setup)
                 return -EINVAL;
         if (!udc)
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index fc719a3f855..f5b8d215e1d 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1746,7 +1746,7 @@ static int r8a66597_start(struct usb_gadget *gadget,
         struct r8a66597 *r8a66597 = gadget_to_r8a66597(gadget);
 
         if (!driver
-                        || driver->speed < USB_SPEED_HIGH
+                        || driver->max_speed < USB_SPEED_HIGH
                         || !driver->setup)
                 return -EINVAL;
         if (!r8a66597)
@@ -1911,7 +1911,7 @@ static int __init r8a66597_probe(struct platform_device *pdev)
 
         r8a66597->gadget.ops = &r8a66597_gadget_ops;
         dev_set_name(&r8a66597->gadget.dev, "gadget");
-        r8a66597->gadget.is_dualspeed = 1;
+        r8a66597->gadget.max_speed = USB_SPEED_HIGH;
         r8a66597->gadget.dev.parent = &pdev->dev;
         r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
         r8a66597->gadget.dev.release = pdev->dev.release;
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index b31448229f0..69295ba9d99 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2586,7 +2586,7 @@ static int s3c_hsotg_start(struct usb_gadget_driver *driver,
                 return -EINVAL;
         }
 
-        if (driver->speed < USB_SPEED_FULL)
+        if (driver->max_speed < USB_SPEED_FULL)
                 dev_err(hsotg->dev, "%s: bad speed\n", __func__);
 
         if (!bind || !driver->setup) {
@@ -3362,7 +3362,7 @@ static int __devinit s3c_hsotg_probe(struct platform_device *pdev)
 
         dev_set_name(&hsotg->gadget.dev, "gadget");
 
-        hsotg->gadget.is_dualspeed = 1;
+        hsotg->gadget.max_speed = USB_SPEED_HIGH;
         hsotg->gadget.ops = &s3c_hsotg_gadget_ops;
         hsotg->gadget.name = dev_name(dev);
 
@@ -3467,18 +3467,7 @@ static struct platform_driver s3c_hsotg_driver = {
         .resume         = s3c_hsotg_resume,
 };
 
-static int __init s3c_hsotg_modinit(void)
-{
-        return platform_driver_register(&s3c_hsotg_driver);
-}
-
-static void __exit s3c_hsotg_modexit(void)
-{
-        platform_driver_unregister(&s3c_hsotg_driver);
-}
-
-module_init(s3c_hsotg_modinit);
-module_exit(s3c_hsotg_modexit);
+module_platform_driver(s3c_hsotg_driver);
 
 MODULE_DESCRIPTION("Samsung S3C USB High-speed/OtG device");
 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index 20a553b46ae..df8661d266c 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -28,9 +28,10 @@
 #include <linux/usb/gadget.h>
 #include <linux/usb/otg.h>
 #include <linux/prefetch.h>
+#include <linux/platform_data/s3c-hsudc.h>
+#include <linux/regulator/consumer.h>
 
 #include <mach/regs-s3c2443-clock.h>
-#include <plat/udc.h>
 
 #define S3C_HSUDC_REG(x)        (x)
 
@@ -87,6 +88,12 @@
 #define DATA_STATE_XMIT                 (1)
 #define DATA_STATE_RECV                 (2)
 
+static const char * const s3c_hsudc_supply_names[] = {
+        "vdda",         /* analog phy supply, 3.3V */
+        "vddi",         /* digital phy supply, 1.2V */
+        "vddosc",       /* oscillator supply, 1.8V - 3.3V */
+};
+
 /**
  * struct s3c_hsudc_ep - Endpoint representation used by driver.
  * @ep: USB gadget layer representation of device endpoint.
@@ -139,6 +146,7 @@ struct s3c_hsudc {
         struct device *dev;
         struct s3c24xx_hsudc_platdata *pd;
         struct otg_transceiver *transceiver;
+        struct regulator_bulk_data supplies[ARRAY_SIZE(s3c_hsudc_supply_names)];
         spinlock_t lock;
         void __iomem *regs;
         struct resource *mem_rsrc;
@@ -153,7 +161,6 @@ struct s3c_hsudc {
 #define ep_index(_ep)           ((_ep)->bEndpointAddress & \
                                         USB_ENDPOINT_NUMBER_MASK)
 
-static struct s3c_hsudc *the_controller;
 static const char driver_name[] = "s3c-udc";
 static const char ep0name[] = "ep0-control";
 
@@ -282,8 +289,7 @@ static void s3c_hsudc_nuke_ep(struct s3c_hsudc_ep *hsep, int status)
  * All the endpoints are stopped and any pending transfer requests if any on
  * the endpoint are terminated.
  */
-static void s3c_hsudc_stop_activity(struct s3c_hsudc *hsudc,
-                          struct usb_gadget_driver *driver)
+static void s3c_hsudc_stop_activity(struct s3c_hsudc *hsudc)
 {
         struct s3c_hsudc_ep *hsep;
         int epnum;
@@ -295,10 +301,6 @@ static void s3c_hsudc_stop_activity(struct s3c_hsudc *hsudc,
                 hsep->stopped = 1;
                 s3c_hsudc_nuke_ep(hsep, -ESHUTDOWN);
         }
-
-        spin_unlock(&hsudc->lock);
-        driver->disconnect(&hsudc->gadget);
-        spin_lock(&hsudc->lock);
 }
 
 /**
@@ -1135,16 +1137,15 @@ static irqreturn_t s3c_hsudc_irq(int irq, void *_dev)
         return IRQ_HANDLED;
 }
 
-static int s3c_hsudc_start(struct usb_gadget_driver *driver,
-                int (*bind)(struct usb_gadget *))
+static int s3c_hsudc_start(struct usb_gadget *gadget,
+                struct usb_gadget_driver *driver)
 {
-        struct s3c_hsudc *hsudc = the_controller;
+        struct s3c_hsudc *hsudc = to_hsudc(gadget);
         int ret;
 
         if (!driver
-                || driver->speed < USB_SPEED_FULL
-                || !bind
-                || !driver->unbind || !driver->disconnect || !driver->setup)
+                || driver->max_speed < USB_SPEED_FULL
+                || !driver->setup)
                 return -EINVAL;
 
         if (!hsudc)
@@ -1155,21 +1156,12 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
 
         hsudc->driver = driver;
         hsudc->gadget.dev.driver = &driver->driver;
-        hsudc->gadget.speed = USB_SPEED_UNKNOWN;
-        ret = device_add(&hsudc->gadget.dev);
-        if (ret) {
-                dev_err(hsudc->dev, "failed to probe gadget device");
-                return ret;
-        }
 
-        ret = bind(&hsudc->gadget);
-        if (ret) {
-                dev_err(hsudc->dev, "%s: bind failed\n", hsudc->gadget.name);
-                device_del(&hsudc->gadget.dev);
-
-                hsudc->driver = NULL;
-                hsudc->gadget.dev.driver = NULL;
-                return ret;
+        ret = regulator_bulk_enable(ARRAY_SIZE(hsudc->supplies),
+                                    hsudc->supplies);
+        if (ret != 0) {
+                dev_err(hsudc->dev, "failed to enable supplies: %d\n", ret);
+                goto err_supplies;
         }
 
         /* connect to bus through transceiver */
@@ -1178,13 +1170,7 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
                 if (ret) {
                         dev_err(hsudc->dev, "%s: can't bind to transceiver\n",
                                         hsudc->gadget.name);
-                        driver->unbind(&hsudc->gadget);
-
-                        device_del(&hsudc->gadget.dev);
-
-                        hsudc->driver = NULL;
-                        hsudc->gadget.dev.driver = NULL;
-                        return ret;
+                        goto err_otg;
                 }
         }
 
@@ -1197,34 +1183,43 @@ static int s3c_hsudc_start(struct usb_gadget_driver *driver,
                 hsudc->pd->gpio_init();
 
         return 0;
+err_otg:
+        regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+err_supplies:
+        hsudc->driver = NULL;
+        hsudc->gadget.dev.driver = NULL;
+        return ret;
 }
 
-static int s3c_hsudc_stop(struct usb_gadget_driver *driver)
+static int s3c_hsudc_stop(struct usb_gadget *gadget,
+                struct usb_gadget_driver *driver)
 {
-        struct s3c_hsudc *hsudc = the_controller;
+        struct s3c_hsudc *hsudc = to_hsudc(gadget);
         unsigned long flags;
 
         if (!hsudc)
                 return -ENODEV;
 
-        if (!driver || driver != hsudc->driver || !driver->unbind)
+        if (!driver || driver != hsudc->driver)
                 return -EINVAL;
 
         spin_lock_irqsave(&hsudc->lock, flags);
-        hsudc->driver = 0;
+        hsudc->driver = NULL;
+        hsudc->gadget.dev.driver = NULL;
+        hsudc->gadget.speed = USB_SPEED_UNKNOWN;
         s3c_hsudc_uninit_phy();
         if (hsudc->pd->gpio_uninit)
                 hsudc->pd->gpio_uninit();
-        s3c_hsudc_stop_activity(hsudc, driver);
+        s3c_hsudc_stop_activity(hsudc);
         spin_unlock_irqrestore(&hsudc->lock, flags);
 
         if (hsudc->transceiver)
                 (void) otg_set_peripheral(hsudc->transceiver, NULL);
 
-        driver->unbind(&hsudc->gadget);
-        device_del(&hsudc->gadget.dev);
         disable_irq(hsudc->irq);
 
+        regulator_bulk_disable(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+
         dev_info(hsudc->dev, "unregistered gadget driver '%s'\n",
                         driver->driver.name);
         return 0;
@@ -1242,7 +1237,7 @@ static int s3c_hsudc_gadget_getframe(struct usb_gadget *gadget)
 
 static int s3c_hsudc_vbus_draw(struct usb_gadget *gadget, unsigned mA)
 {
-        struct s3c_hsudc *hsudc = the_controller;
+        struct s3c_hsudc *hsudc = to_hsudc(gadget);
 
         if (!hsudc)
                 return -ENODEV;
@@ -1255,18 +1250,18 @@ static int s3c_hsudc_vbus_draw(struct usb_gadget *gadget, unsigned mA)
 
 static struct usb_gadget_ops s3c_hsudc_gadget_ops = {
         .get_frame      = s3c_hsudc_gadget_getframe,
-        .start          = s3c_hsudc_start,
-        .stop           = s3c_hsudc_stop,
+        .udc_start      = s3c_hsudc_start,
+        .udc_stop       = s3c_hsudc_stop,
         .vbus_draw      = s3c_hsudc_vbus_draw,
 };
 
-static int s3c_hsudc_probe(struct platform_device *pdev)
+static int __devinit s3c_hsudc_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
         struct resource *res;
         struct s3c_hsudc *hsudc;
         struct s3c24xx_hsudc_platdata *pd = pdev->dev.platform_data;
-        int ret;
+        int ret, i;
 
         hsudc = kzalloc(sizeof(struct s3c_hsudc) +
                         sizeof(struct s3c_hsudc_ep) * pd->epnum,
@@ -1276,13 +1271,22 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
 
-        the_controller = hsudc;
         platform_set_drvdata(pdev, dev);
         hsudc->dev = dev;
         hsudc->pd = pdev->dev.platform_data;
 
         hsudc->transceiver = otg_get_transceiver();
 
+        for (i = 0; i < ARRAY_SIZE(hsudc->supplies); i++)
+                hsudc->supplies[i].supply = s3c_hsudc_supply_names[i];
+
+        ret = regulator_bulk_get(dev, ARRAY_SIZE(hsudc->supplies),
+                                 hsudc->supplies);
+        if (ret != 0) {
+                dev_err(dev, "failed to request supplies: %d\n", ret);
+                goto err_supplies;
+        }
+
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
                 dev_err(dev, "unable to obtain driver resource data\n");
@@ -1307,10 +1311,9 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
 
         spin_lock_init(&hsudc->lock);
 
-        device_initialize(&hsudc->gadget.dev);
         dev_set_name(&hsudc->gadget.dev, "gadget");
 
-        hsudc->gadget.is_dualspeed = 1;
+        hsudc->gadget.max_speed = USB_SPEED_HIGH;
         hsudc->gadget.ops = &s3c_hsudc_gadget_ops;
         hsudc->gadget.name = dev_name(dev);
         hsudc->gadget.dev.parent = dev;
@@ -1319,6 +1322,7 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
 
         hsudc->gadget.is_otg = 0;
         hsudc->gadget.is_a_peripheral = 0;
+        hsudc->gadget.speed = USB_SPEED_UNKNOWN;
 
         s3c_hsudc_setup_ep(hsudc);
 
@@ -1348,12 +1352,20 @@ static int s3c_hsudc_probe(struct platform_device *pdev)
         disable_irq(hsudc->irq);
         local_irq_enable();
 
+        ret = device_register(&hsudc->gadget.dev);
+        if (ret) {
+                put_device(&hsudc->gadget.dev);
+                goto err_add_device;
+        }
+
         ret = usb_add_gadget_udc(&pdev->dev, &hsudc->gadget);
         if (ret)
                 goto err_add_udc;
 
         return 0;
 err_add_udc:
+        device_unregister(&hsudc->gadget.dev);
+err_add_device:
         clk_disable(hsudc->uclk);
         clk_put(hsudc->uclk);
 err_clk:
@@ -1362,10 +1374,13 @@ err_irq:
         iounmap(hsudc->regs);
 
 err_remap:
-        release_resource(hsudc->mem_rsrc);
-        kfree(hsudc->mem_rsrc);
-
+        release_mem_region(res->start, resource_size(res));
 err_res:
+        if (hsudc->transceiver)
+                otg_put_transceiver(hsudc->transceiver);
+
+        regulator_bulk_free(ARRAY_SIZE(hsudc->supplies), hsudc->supplies);
+err_supplies:
         kfree(hsudc);
         return ret;
 }
@@ -1377,21 +1392,10 @@ static struct platform_driver s3c_hsudc_driver = {
         },
         .probe          = s3c_hsudc_probe,
 };
-MODULE_ALIAS("platform:s3c-hsudc");
-
-static int __init s3c_hsudc_modinit(void)
-{
-        return platform_driver_register(&s3c_hsudc_driver);
-}
 
-static void __exit s3c_hsudc_modexit(void)
-{
-        platform_driver_unregister(&s3c_hsudc_driver);
-}
-
-module_init(s3c_hsudc_modinit);
-module_exit(s3c_hsudc_modexit);
+module_platform_driver(s3c_hsudc_driver);
 
 MODULE_DESCRIPTION("Samsung S3C24XX USB high-speed controller driver");
 MODULE_AUTHOR("Thomas Abraham <thomas.ab@samsung.com>");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:s3c-hsudc");
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index fac4c650d4b..3f87cb9344b 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1683,9 +1683,9 @@ static int s3c2410_udc_start(struct usb_gadget_driver *driver,
         if (udc->driver)
                 return -EBUSY;
 
-        if (!bind || !driver->setup || driver->speed < USB_SPEED_FULL) {
+        if (!bind || !driver->setup || driver->max_speed < USB_SPEED_FULL) {
                 printk(KERN_ERR "Invalid driver: bind %p setup %p speed %d\n",
-                        bind, driver->setup, driver->speed);
+                        bind, driver->setup, driver->max_speed);
                 return -EINVAL;
         }
 #if defined(MODULE)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 6939e17f458..0b0d12ccc48 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -371,14 +371,28 @@ static ssize_t usb_udc_softconn_store(struct device *dev,
 }
 static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store);
 
-static ssize_t usb_udc_speed_show(struct device *dev,
+#define USB_UDC_SPEED_ATTR(name, param)                                 \
+ssize_t usb_udc_##param##_show(struct device *dev,                      \
+                struct device_attribute *attr, char *buf)               \
+{                                                                       \
+        struct usb_udc *udc = container_of(dev, struct usb_udc, dev);   \
+        return snprintf(buf, PAGE_SIZE, "%s\n",                         \
+                        usb_speed_string(udc->gadget->param));          \
+}                                                                       \
+static DEVICE_ATTR(name, S_IRUSR, usb_udc_##param##_show, NULL)
+
+static USB_UDC_SPEED_ATTR(current_speed, speed);
+static USB_UDC_SPEED_ATTR(maximum_speed, max_speed);
+
+/* TODO: Scheduled for removal in 3.8. */
+static ssize_t usb_udc_is_dualspeed_show(struct device *dev,
                 struct device_attribute *attr, char *buf)
 {
         struct usb_udc          *udc = container_of(dev, struct usb_udc, dev);
-        return snprintf(buf, PAGE_SIZE, "%s\n",
-                        usb_speed_string(udc->gadget->speed));
+        return snprintf(buf, PAGE_SIZE, "%d\n",
+                        gadget_is_dualspeed(udc->gadget));
 }
-static DEVICE_ATTR(speed, S_IRUGO, usb_udc_speed_show, NULL);
+static DEVICE_ATTR(is_dualspeed, S_IRUSR, usb_udc_is_dualspeed_show, NULL);
 
 #define USB_UDC_ATTR(name)                                      \
 ssize_t usb_udc_##name##_show(struct device *dev,               \
@@ -391,7 +405,6 @@ ssize_t usb_udc_##name##_show(struct device *dev,		\
 }                                                               \
 static DEVICE_ATTR(name, S_IRUGO, usb_udc_##name##_show, NULL)
 
-static USB_UDC_ATTR(is_dualspeed);
 static USB_UDC_ATTR(is_otg);
 static USB_UDC_ATTR(is_a_peripheral);
 static USB_UDC_ATTR(b_hnp_enable);
@@ -401,7 +414,8 @@ static USB_UDC_ATTR(a_alt_hnp_support);
 static struct attribute *usb_udc_attrs[] = {
         &dev_attr_srp.attr,
         &dev_attr_soft_connect.attr,
-        &dev_attr_speed.attr,
+        &dev_attr_current_speed.attr,
+        &dev_attr_maximum_speed.attr,
 
         &dev_attr_is_dualspeed.attr,
         &dev_attr_is_otg.attr,
diff --git a/drivers/usb/gadget/usbstring.c b/drivers/usb/gadget/usbstring.c
index 58c4d37d312..4d25b9009ed 100644
--- a/drivers/usb/gadget/usbstring.c
+++ b/drivers/usb/gadget/usbstring.c
@@ -13,82 +13,17 @@
 #include <linux/string.h>
 #include <linux/device.h>
 #include <linux/init.h>
+#include <linux/nls.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
 
-#include <asm/unaligned.h>
-
-
-static int utf8_to_utf16le(const char *s, __le16 *cp, unsigned len)
-{
-        int     count = 0;
-        u8      c;
-        u16     uchar;
-
-        /* this insists on correct encodings, though not minimal ones.
-         * BUT it currently rejects legit 4-byte UTF-8 code points,
-         * which need surrogate pairs.  (Unicode 3.1 can use them.)
-         */
-        while (len != 0 && (c = (u8) *s++) != 0) {
-                if (unlikely(c & 0x80)) {
-                        // 2-byte sequence:
-                        // 00000yyyyyxxxxxx = 110yyyyy 10xxxxxx
-                        if ((c & 0xe0) == 0xc0) {
-                                uchar = (c & 0x1f) << 6;
-
-                                c = (u8) *s++;
-                                if ((c & 0xc0) != 0x80)
-                                        goto fail;
-                                c &= 0x3f;
-                                uchar |= c;
-
-                        // 3-byte sequence (most CJKV characters):
-                        // zzzzyyyyyyxxxxxx = 1110zzzz 10yyyyyy 10xxxxxx
-                        } else if ((c & 0xf0) == 0xe0) {
-                                uchar = (c & 0x0f) << 12;
-
-                                c = (u8) *s++;
-                                if ((c & 0xc0) != 0x80)
-                                        goto fail;
-                                c &= 0x3f;
-                                uchar |= c << 6;
-
-                                c = (u8) *s++;
-                                if ((c & 0xc0) != 0x80)
-                                        goto fail;
-                                c &= 0x3f;
-                                uchar |= c;
-
-                                /* no bogus surrogates */
-                                if (0xd800 <= uchar && uchar <= 0xdfff)
-                                        goto fail;
-
-                        // 4-byte sequence (surrogate pairs, currently rare):
-                        // 11101110wwwwzzzzyy + 110111yyyyxxxxxx
-                        //     = 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx
-                        // (uuuuu = wwww + 1)
-                        // FIXME accept the surrogate code points (only)
-
-                        } else
-                                goto fail;
-                } else
-                        uchar = c;
-                put_unaligned_le16(uchar, cp++);
-                count++;
-                len--;
-        }
-        return count;
-fail:
-        return -1;
-}
-
 
 /**
  * usb_gadget_get_string - fill out a string descriptor 
  * @table: of c strings encoded using UTF-8
  * @id: string id, from low byte of wValue in get string descriptor
- * @buf: at least 256 bytes
+ * @buf: at least 256 bytes, must be 16-bit aligned
  *
  * Finds the UTF-8 string matching the ID, and converts it into a
  * string descriptor in utf16-le.
@@ -125,8 +60,8 @@ usb_gadget_get_string (struct usb_gadget_strings *table, int id, u8 *buf)
 
         /* string descriptors have length, tag, then UTF16-LE text */
         len = min ((size_t) 126, strlen (s->s));
-        memset (buf + 2, 0, 2 * len);   /* zero all the bytes */
-        len = utf8_to_utf16le(s->s, (__le16 *)&buf[2], len);
+        len = utf8s_to_utf16s(s->s, len, UTF16_LITTLE_ENDIAN,
+                        (wchar_t *) &buf[2], 126);
         if (len < 0)
                 return -EINVAL;
         buf [0] = (len + 1) * 2;
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 060e0e2b1ae..a52769b5c90 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -194,6 +194,15 @@ config USB_EHCI_S5P
        help
          Enable support for the S5P SOC's on-chip EHCI controller.
 
+config USB_EHCI_MV
+        bool "EHCI support for Marvell on-chip controller"
+        depends on USB_EHCI_HCD
+        select USB_EHCI_ROOT_HUB_TT
+        ---help---
+          Enables support for Marvell (including PXA and MMP series) on-chip
+          USB SPH and OTG controller. SPH is a single port host, and it can
+          only be EHCI host. OTG is controller that can switch to host mode.
+
 config USB_W90X900_EHCI
         bool "W90X900(W90P910) EHCI support"
         depends on USB_EHCI_HCD && ARCH_W90X900
diff --git a/drivers/usb/host/ehci-au1xxx.c b/drivers/usb/host/ehci-au1xxx.c
index 18bafa99fe5..bf7441afed1 100644
--- a/drivers/usb/host/ehci-au1xxx.c
+++ b/drivers/usb/host/ehci-au1xxx.c
@@ -23,6 +23,7 @@ static int au1xxx_ehci_setup(struct usb_hcd *hcd)
         int ret = ehci_init(hcd);
 
         ehci->need_io_watchdog = 0;
+        ehci_reset(ehci);
         return ret;
 }
 
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 3ff9f82f726..e311a511529 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -48,6 +48,10 @@
 #include <asm/system.h>
 #include <asm/unaligned.h>
 
+#if defined(CONFIG_PPC_PS3)
+#include <asm/firmware.h>
+#endif
+
 /*-------------------------------------------------------------------------*/
 
 /*
@@ -230,12 +234,58 @@ static int ehci_halt (struct ehci_hcd *ehci)
                           STS_HALT, STS_HALT, 16 * 125);
 }
 
+#if defined(CONFIG_USB_SUSPEND) && defined(CONFIG_PPC_PS3)
+
+/*
+ * The EHCI controller of the Cell Super Companion Chip used in the
+ * PS3 will stop the root hub after all root hub ports are suspended.
+ * When in this condition handshake will return -ETIMEDOUT.  The
+ * STS_HLT bit will not be set, so inspection of the frame index is
+ * used here to test for the condition.  If the condition is found
+ * return success to allow the USB suspend to complete.
+ */
+
+static int handshake_for_broken_root_hub(struct ehci_hcd *ehci,
+                                         void __iomem *ptr, u32 mask, u32 done,
+                                         int usec)
+{
+        unsigned int old_index;
+        int error;
+
+        if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
+                return -ETIMEDOUT;
+
+        old_index = ehci_read_frame_index(ehci);
+
+        error = handshake(ehci, ptr, mask, done, usec);
+
+        if (error == -ETIMEDOUT && ehci_read_frame_index(ehci) == old_index)
+                return 0;
+
+        return error;
+}
+
+#else
+
+static int handshake_for_broken_root_hub(struct ehci_hcd *ehci,
+                                         void __iomem *ptr, u32 mask, u32 done,
+                                         int usec)
+{
+        return -ETIMEDOUT;
+}
+
+#endif
+
 static int handshake_on_error_set_halt(struct ehci_hcd *ehci, void __iomem *ptr,
                                        u32 mask, u32 done, int usec)
 {
         int error;
 
         error = handshake(ehci, ptr, mask, done, usec);
+        if (error == -ETIMEDOUT)
+                error = handshake_for_broken_root_hub(ehci, ptr, mask, done,
+                                                      usec);
+
         if (error) {
                 ehci_halt(ehci);
                 ehci->rh_state = EHCI_RH_HALTED;
@@ -620,6 +670,7 @@ static int ehci_init(struct usb_hcd *hcd)
         hw = ehci->async->hw;
         hw->hw_next = QH_NEXT(ehci, ehci->async->qh_dma);
         hw->hw_info1 = cpu_to_hc32(ehci, QH_HEAD);
+        hw->hw_info1 |= cpu_to_hc32(ehci, (1 << 7));    /* I = 1 */
         hw->hw_token = cpu_to_hc32(ehci, QTD_STS_HALT);
         hw->hw_qtd_next = EHCI_LIST_END(ehci);
         ehci->async->qh_state = QH_STATE_LINKED;
@@ -677,22 +728,13 @@ static int ehci_init(struct usb_hcd *hcd)
 static int ehci_run (struct usb_hcd *hcd)
 {
         struct ehci_hcd         *ehci = hcd_to_ehci (hcd);
-        int                     retval;
         u32                     temp;
         u32                     hcc_params;
 
         hcd->uses_new_polling = 1;
 
         /* EHCI spec section 4.1 */
-        /*
-         * TDI driver does the ehci_reset in their reset callback.
-         * Don't reset here, because configuration settings will
-         * vanish.
-         */
-        if (!ehci_is_TDI(ehci) && (retval = ehci_reset(ehci)) != 0) {
-                ehci_mem_cleanup(ehci);
-                return retval;
-        }
+
         ehci_writel(ehci, ehci->periodic_dma, &ehci->regs->frame_list);
         ehci_writel(ehci, (u32)ehci->async->qh_dma, &ehci->regs->async_next);
 
@@ -1324,11 +1366,16 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ehci_pxa168_driver
 #endif
 
-#ifdef CONFIG_NLM_XLR
+#ifdef CONFIG_CPU_XLR
 #include "ehci-xls.c"
 #define PLATFORM_DRIVER         ehci_xls_driver
 #endif
 
+#ifdef CONFIG_USB_EHCI_MV
+#include "ehci-mv.c"
+#define        PLATFORM_DRIVER         ehci_mv_driver
+#endif
+
 #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
     !defined(XILINX_OF_PLATFORM_DRIVER)
diff --git a/drivers/usb/host/ehci-mv.c b/drivers/usb/host/ehci-mv.c
new file mode 100644
index 00000000000..52a604fb932
--- /dev/null
+++ b/drivers/usb/host/ehci-mv.c
@@ -0,0 +1,391 @@
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ * Author: Chao Xie <chao.xie@marvell.com>
+ *        Neil Zhang <zhangwm@marvell.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/usb/otg.h>
+#include <linux/platform_data/mv_usb.h>
+
+#define CAPLENGTH_MASK         (0xff)
+
+struct ehci_hcd_mv {
+        struct usb_hcd *hcd;
+
+        /* Which mode does this ehci running OTG/Host ? */
+        int mode;
+
+        void __iomem *phy_regs;
+        void __iomem *cap_regs;
+        void __iomem *op_regs;
+
+        struct otg_transceiver *otg;
+
+        struct mv_usb_platform_data *pdata;
+
+        /* clock source and total clock number */
+        unsigned int clknum;
+        struct clk *clk[0];
+};
+
+static void ehci_clock_enable(struct ehci_hcd_mv *ehci_mv)
+{
+        unsigned int i;
+
+        for (i = 0; i < ehci_mv->clknum; i++)
+                clk_enable(ehci_mv->clk[i]);
+}
+
+static void ehci_clock_disable(struct ehci_hcd_mv *ehci_mv)
+{
+        unsigned int i;
+
+        for (i = 0; i < ehci_mv->clknum; i++)
+                clk_disable(ehci_mv->clk[i]);
+}
+
+static int mv_ehci_enable(struct ehci_hcd_mv *ehci_mv)
+{
+        int retval;
+
+        ehci_clock_enable(ehci_mv);
+        if (ehci_mv->pdata->phy_init) {
+                retval = ehci_mv->pdata->phy_init(ehci_mv->phy_regs);
+                if (retval)
+                        return retval;
+        }
+
+        return 0;
+}
+
+static void mv_ehci_disable(struct ehci_hcd_mv *ehci_mv)
+{
+        if (ehci_mv->pdata->phy_deinit)
+                ehci_mv->pdata->phy_deinit(ehci_mv->phy_regs);
+        ehci_clock_disable(ehci_mv);
+}
+
+static int mv_ehci_reset(struct usb_hcd *hcd)
+{
+        struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+        struct device *dev = hcd->self.controller;
+        struct ehci_hcd_mv *ehci_mv = dev_get_drvdata(dev);
+        int retval;
+
+        if (ehci_mv == NULL) {
+                dev_err(dev, "Can not find private ehci data\n");
+                return -ENODEV;
+        }
+
+        /*
+         * data structure init
+         */
+        retval = ehci_init(hcd);
+        if (retval) {
+                dev_err(dev, "ehci_init failed %d\n", retval);
+                return retval;
+        }
+
+        hcd->has_tt = 1;
+        ehci->sbrn = 0x20;
+
+        retval = ehci_reset(ehci);
+        if (retval) {
+                dev_err(dev, "ehci_reset failed %d\n", retval);
+                return retval;
+        }
+
+        return 0;
+}
+
+static const struct hc_driver mv_ehci_hc_driver = {
+        .description = hcd_name,
+        .product_desc = "Marvell EHCI",
+        .hcd_priv_size = sizeof(struct ehci_hcd),
+
+        /*
+         * generic hardware linkage
+         */
+        .irq = ehci_irq,
+        .flags = HCD_MEMORY | HCD_USB2,
+
+        /*
+         * basic lifecycle operations
+         */
+        .reset = mv_ehci_reset,
+        .start = ehci_run,
+        .stop = ehci_stop,
+        .shutdown = ehci_shutdown,
+
+        /*
+         * managing i/o requests and associated device resources
+         */
+        .urb_enqueue = ehci_urb_enqueue,
+        .urb_dequeue = ehci_urb_dequeue,
+        .endpoint_disable = ehci_endpoint_disable,
+        .endpoint_reset = ehci_endpoint_reset,
+        .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
+
+        /*
+         * scheduling support
+         */
+        .get_frame_number = ehci_get_frame,
+
+        /*
+         * root hub support
+         */
+        .hub_status_data = ehci_hub_status_data,
+        .hub_control = ehci_hub_control,
+        .bus_suspend = ehci_bus_suspend,
+        .bus_resume = ehci_bus_resume,
+};
+
+static int mv_ehci_probe(struct platform_device *pdev)
+{
+        struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
+        struct usb_hcd *hcd;
+        struct ehci_hcd *ehci;
+        struct ehci_hcd_mv *ehci_mv;
+        struct resource *r;
+        int clk_i, retval = -ENODEV;
+        u32 offset;
+        size_t size;
+
+        if (!pdata) {
+                dev_err(&pdev->dev, "missing platform_data\n");
+                return -ENODEV;
+        }
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        hcd = usb_create_hcd(&mv_ehci_hc_driver, &pdev->dev, "mv ehci");
+        if (!hcd)
+                return -ENOMEM;
+
+        size = sizeof(*ehci_mv) + sizeof(struct clk *) * pdata->clknum;
+        ehci_mv = kzalloc(size, GFP_KERNEL);
+        if (ehci_mv == NULL) {
+                dev_err(&pdev->dev, "cannot allocate ehci_hcd_mv\n");
+                retval = -ENOMEM;
+                goto err_put_hcd;
+        }
+
+        platform_set_drvdata(pdev, ehci_mv);
+        ehci_mv->pdata = pdata;
+        ehci_mv->hcd = hcd;
+
+        ehci_mv->clknum = pdata->clknum;
+        for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++) {
+                ehci_mv->clk[clk_i] =
+                    clk_get(&pdev->dev, pdata->clkname[clk_i]);
+                if (IS_ERR(ehci_mv->clk[clk_i])) {
+                        dev_err(&pdev->dev, "error get clck \"%s\"\n",
+                                pdata->clkname[clk_i]);
+                        retval = PTR_ERR(ehci_mv->clk[clk_i]);
+                        goto err_put_clk;
+                }
+        }
+
+        r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phyregs");
+        if (r == NULL) {
+                dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
+                retval = -ENODEV;
+                goto err_put_clk;
+        }
+
+        ehci_mv->phy_regs = ioremap(r->start, resource_size(r));
+        if (ehci_mv->phy_regs == 0) {
+                dev_err(&pdev->dev, "failed to map phy I/O memory\n");
+                retval = -EFAULT;
+                goto err_put_clk;
+        }
+
+        r = platform_get_resource_byname(pdev, IORESOURCE_MEM, "capregs");
+        if (!r) {
+                dev_err(&pdev->dev, "no I/O memory resource defined\n");
+                retval = -ENODEV;
+                goto err_iounmap_phyreg;
+        }
+
+        ehci_mv->cap_regs = ioremap(r->start, resource_size(r));
+        if (ehci_mv->cap_regs == NULL) {
+                dev_err(&pdev->dev, "failed to map I/O memory\n");
+                retval = -EFAULT;
+                goto err_iounmap_phyreg;
+        }
+
+        retval = mv_ehci_enable(ehci_mv);
+        if (retval) {
+                dev_err(&pdev->dev, "init phy error %d\n", retval);
+                goto err_iounmap_capreg;
+        }
+
+        offset = readl(ehci_mv->cap_regs) & CAPLENGTH_MASK;
+        ehci_mv->op_regs =
+                (void __iomem *) ((unsigned long) ehci_mv->cap_regs + offset);
+
+        hcd->rsrc_start = r->start;
+        hcd->rsrc_len = r->end - r->start + 1;
+        hcd->regs = ehci_mv->op_regs;
+
+        hcd->irq = platform_get_irq(pdev, 0);
+        if (!hcd->irq) {
+                dev_err(&pdev->dev, "Cannot get irq.");
+                retval = -ENODEV;
+                goto err_disable_clk;
+        }
+
+        ehci = hcd_to_ehci(hcd);
+        ehci->caps = (struct ehci_caps *) ehci_mv->cap_regs;
+        ehci->regs = (struct ehci_regs *) ehci_mv->op_regs;
+        ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
+
+        ehci_mv->mode = pdata->mode;
+        if (ehci_mv->mode == MV_USB_MODE_OTG) {
+#ifdef CONFIG_USB_OTG_UTILS
+                ehci_mv->otg = otg_get_transceiver();
+                if (!ehci_mv->otg) {
+                        dev_err(&pdev->dev,
+                                "unable to find transceiver\n");
+                        retval = -ENODEV;
+                        goto err_disable_clk;
+                }
+
+                retval = otg_set_host(ehci_mv->otg, &hcd->self);
+                if (retval < 0) {
+                        dev_err(&pdev->dev,
+                                "unable to register with transceiver\n");
+                        retval = -ENODEV;
+                        goto err_put_transceiver;
+                }
+                /* otg will enable clock before use as host */
+                mv_ehci_disable(ehci_mv);
+#else
+                dev_info(&pdev->dev, "MV_USB_MODE_OTG "
+                         "must have CONFIG_USB_OTG_UTILS enabled\n");
+                goto err_disable_clk;
+#endif
+        } else {
+                if (pdata->set_vbus)
+                        pdata->set_vbus(1);
+
+                retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+                if (retval) {
+                        dev_err(&pdev->dev,
+                                "failed to add hcd with err %d\n", retval);
+                        goto err_set_vbus;
+                }
+        }
+
+        if (pdata->private_init)
+                pdata->private_init(ehci_mv->op_regs, ehci_mv->phy_regs);
+
+        dev_info(&pdev->dev,
+                 "successful find EHCI device with regs 0x%p irq %d"
+                 " working in %s mode\n", hcd->regs, hcd->irq,
+                 ehci_mv->mode == MV_USB_MODE_OTG ? "OTG" : "Host");
+
+        return 0;
+
+err_set_vbus:
+        if (pdata->set_vbus)
+                pdata->set_vbus(0);
+#ifdef CONFIG_USB_OTG_UTILS
+err_put_transceiver:
+        if (ehci_mv->otg)
+                otg_put_transceiver(ehci_mv->otg);
+#endif
+err_disable_clk:
+        mv_ehci_disable(ehci_mv);
+err_iounmap_capreg:
+        iounmap(ehci_mv->cap_regs);
+err_iounmap_phyreg:
+        iounmap(ehci_mv->phy_regs);
+err_put_clk:
+        for (clk_i--; clk_i >= 0; clk_i--)
+                clk_put(ehci_mv->clk[clk_i]);
+        platform_set_drvdata(pdev, NULL);
+        kfree(ehci_mv);
+err_put_hcd:
+        usb_put_hcd(hcd);
+
+        return retval;
+}
+
+static int mv_ehci_remove(struct platform_device *pdev)
+{
+        struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
+        struct usb_hcd *hcd = ehci_mv->hcd;
+        int clk_i;
+
+        if (hcd->rh_registered)
+                usb_remove_hcd(hcd);
+
+        if (ehci_mv->otg) {
+                otg_set_host(ehci_mv->otg, NULL);
+                otg_put_transceiver(ehci_mv->otg);
+        }
+
+        if (ehci_mv->mode == MV_USB_MODE_HOST) {
+                if (ehci_mv->pdata->set_vbus)
+                        ehci_mv->pdata->set_vbus(0);
+
+                mv_ehci_disable(ehci_mv);
+        }
+
+        iounmap(ehci_mv->cap_regs);
+        iounmap(ehci_mv->phy_regs);
+
+        for (clk_i = 0; clk_i < ehci_mv->clknum; clk_i++)
+                clk_put(ehci_mv->clk[clk_i]);
+
+        platform_set_drvdata(pdev, NULL);
+
+        kfree(ehci_mv);
+        usb_put_hcd(hcd);
+
+        return 0;
+}
+
+MODULE_ALIAS("mv-ehci");
+
+static const struct platform_device_id ehci_id_table[] = {
+        {"pxa-u2oehci", PXA_U2OEHCI},
+        {"pxa-sph", PXA_SPH},
+        {"mmp3-hsic", MMP3_HSIC},
+        {"mmp3-fsic", MMP3_FSIC},
+        {},
+};
+
+static void mv_ehci_shutdown(struct platform_device *pdev)
+{
+        struct ehci_hcd_mv *ehci_mv = platform_get_drvdata(pdev);
+        struct usb_hcd *hcd = ehci_mv->hcd;
+
+        if (!hcd->rh_registered)
+                return;
+
+        if (hcd->driver->shutdown)
+                hcd->driver->shutdown(hcd);
+}
+
+static struct platform_driver ehci_mv_driver = {
+        .probe = mv_ehci_probe,
+        .remove = mv_ehci_remove,
+        .shutdown = mv_ehci_shutdown,
+        .driver = {
+                   .name = "mv-ehci",
+                   .bus = &platform_bus_type,
+                   },
+        .id_table = ehci_id_table,
+};
diff --git a/drivers/usb/host/ehci-octeon.c b/drivers/usb/host/ehci-octeon.c
index ba1f5136113..c0104882c72 100644
--- a/drivers/usb/host/ehci-octeon.c
+++ b/drivers/usb/host/ehci-octeon.c
@@ -155,6 +155,8 @@ static int ehci_octeon_drv_probe(struct platform_device *pdev)
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
 
+        ehci_reset(ehci);
+
         ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (ret) {
                 dev_dbg(&pdev->dev, "failed to add hcd with err %d\n", ret);
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index e39b0297bad..e33baf9052c 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -228,6 +228,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
         /* cache this readonly data; minimize chip reads */
         omap_ehci->hcs_params = readl(&omap_ehci->caps->hcs_params);
 
+        ehci_reset(omap_ehci);
+
         ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (ret) {
                 dev_err(dev, "failed to add hcd with err %d\n", ret);
diff --git a/drivers/usb/host/ehci-ps3.c b/drivers/usb/host/ehci-ps3.c
index 2dc32da75cf..a20e496eb47 100644
--- a/drivers/usb/host/ehci-ps3.c
+++ b/drivers/usb/host/ehci-ps3.c
@@ -21,6 +21,34 @@
 #include <asm/firmware.h>
 #include <asm/ps3.h>
 
+static void ps3_ehci_setup_insnreg(struct ehci_hcd *ehci)
+{
+        /* PS3 HC internal setup register offsets. */
+
+        enum ps3_ehci_hc_insnreg {
+                ps3_ehci_hc_insnreg01 = 0x084,
+                ps3_ehci_hc_insnreg02 = 0x088,
+                ps3_ehci_hc_insnreg03 = 0x08c,
+        };
+
+        /* PS3 EHCI HC errata fix 316 - The PS3 EHCI HC will reset its
+         * internal INSNREGXX setup regs back to the chip default values
+         * on Host Controller Reset (CMD_RESET) or Light Host Controller
+         * Reset (CMD_LRESET).  The work-around for this is for the HC
+         * driver to re-initialise these regs when ever the HC is reset.
+         */
+
+        /* Set burst transfer counts to 256 out, 32 in. */
+
+        writel_be(0x01000020, (void __iomem *)ehci->regs +
+                ps3_ehci_hc_insnreg01);
+
+        /* Enable burst transfer counts. */
+
+        writel_be(0x00000001, (void __iomem *)ehci->regs +
+                ps3_ehci_hc_insnreg03);
+}
+
 static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
 {
         int result;
@@ -49,6 +77,8 @@ static int ps3_ehci_hc_reset(struct usb_hcd *hcd)
 
         ehci_reset(ehci);
 
+        ps3_ehci_setup_insnreg(ehci);
+
         return result;
 }
 
diff --git a/drivers/usb/host/ehci-pxa168.c b/drivers/usb/host/ehci-pxa168.c
index ac0c16e8f53..8d0e7a22e71 100644
--- a/drivers/usb/host/ehci-pxa168.c
+++ b/drivers/usb/host/ehci-pxa168.c
@@ -299,7 +299,7 @@ static int __devinit ehci_pxa168_drv_probe(struct platform_device *pdev)
         ehci = hcd_to_ehci(hcd);
         ehci->caps = hcd->regs + 0x100;
         ehci->regs = hcd->regs + 0x100 +
-                HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
+                HC_LENGTH(ehci, ehci_readl(ehci, &ehci->caps->hc_capbase));
         ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
         hcd->has_tt = 1;
         ehci->sbrn = 0x20;
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 4e4066c35a0..36ca5077cdf 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -373,6 +373,17 @@ qh_completions (struct ehci_hcd *ehci, struct ehci_qh *qh)
  retry_xacterr:
                 if ((token & QTD_STS_ACTIVE) == 0) {
 
+                        /* Report Data Buffer Error: non-fatal but useful */
+                        if (token & QTD_STS_DBE)
+                                ehci_dbg(ehci,
+                                        "detected DataBufferErr for urb %p ep%d%s len %d, qtd %p [qh %p]\n",
+                                        urb,
+                                        usb_endpoint_num(&urb->ep->desc),
+                                        usb_endpoint_dir_in(&urb->ep->desc) ? "in" : "out",
+                                        urb->transfer_buffer_length,
+                                        qtd,
+                                        qh);
+
                         /* on STALL, error, and short reads this urb must
                          * complete and all its qtds must be recycled.
                          */
@@ -647,7 +658,7 @@ qh_urb_transaction (
         /*
          * data transfer stage:  buffer setup
          */
-        i = urb->num_sgs;
+        i = urb->num_mapped_sgs;
         if (len > 0 && i > 0) {
                 sg = urb->sg;
                 buf = sg_dma_address(sg);
diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 024b65c4990..293f7412992 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -14,8 +14,6 @@
 
 #include <linux/clk.h>
 #include <linux/platform_device.h>
-#include <mach/regs-pmu.h>
-#include <plat/cpu.h>
 #include <plat/ehci.h>
 #include <plat/usb-phy.h>
 
@@ -136,6 +134,8 @@ static int __devinit s5p_ehci_probe(struct platform_device *pdev)
         /* cache this readonly data; minimize chip reads */
         ehci->hcs_params = readl(&ehci->caps->hcs_params);
 
+        ehci_reset(ehci);
+
         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (err) {
                 dev_err(&pdev->dev, "Failed to add USB HCD\n");
diff --git a/drivers/usb/host/ehci-vt8500.c b/drivers/usb/host/ehci-vt8500.c
index 54d1ab8aec4..c1eda73916c 100644
--- a/drivers/usb/host/ehci-vt8500.c
+++ b/drivers/usb/host/ehci-vt8500.c
@@ -132,6 +132,8 @@ static int vt8500_ehci_drv_probe(struct platform_device *pdev)
 
         ehci_port_power(ehci, 1);
 
+        ehci_reset(ehci);
+
         ret = usb_add_hcd(hcd, pdev->resource[1].start,
                           IRQF_SHARED);
         if (ret == 0) {
diff --git a/drivers/usb/host/ehci-w90x900.c b/drivers/usb/host/ehci-w90x900.c
index d661cf7de14..3d2e26cbb34 100644
--- a/drivers/usb/host/ehci-w90x900.c
+++ b/drivers/usb/host/ehci-w90x900.c
@@ -78,6 +78,8 @@ static int __devinit usb_w90x900_probe(const struct hc_driver *driver,
         if (irq < 0)
                 goto err4;
 
+        ehci_reset(ehci);
+
         retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
         if (retval != 0)
                 goto err4;
diff --git a/drivers/usb/host/ehci-xls.c b/drivers/usb/host/ehci-xls.c
index b4fb511d24b..72f08196f8c 100644
--- a/drivers/usb/host/ehci-xls.c
+++ b/drivers/usb/host/ehci-xls.c
@@ -69,7 +69,7 @@ int ehci_xls_probe_internal(const struct hc_driver *driver,
         }
 
         hcd->rsrc_start = res->start;
-        hcd->rsrc_len = res->end - res->start + 1;
+        hcd->rsrc_len = resource_size(res);
 
         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
                                 driver->description)) {
diff --git a/drivers/usb/host/fhci-hcd.c b/drivers/usb/host/fhci-hcd.c
index 4ed6d19f2a5..d2623747b48 100644
--- a/drivers/usb/host/fhci-hcd.c
+++ b/drivers/usb/host/fhci-hcd.c
@@ -824,17 +824,7 @@ static struct platform_driver of_fhci_driver = {
         .remove         = __devexit_p(of_fhci_remove),
 };
 
-static int __init fhci_module_init(void)
-{
-        return platform_driver_register(&of_fhci_driver);
-}
-module_init(fhci_module_init);
-
-static void __exit fhci_module_exit(void)
-{
-        platform_driver_unregister(&of_fhci_driver);
-}
-module_exit(fhci_module_exit);
+module_platform_driver(of_fhci_driver);
 
 MODULE_DESCRIPTION("USB Freescale Host Controller Interface Driver");
 MODULE_AUTHOR("Shlomi Gridish <gridish@freescale.com>, "
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index 9037035ad1e..7916e56a725 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -297,17 +297,7 @@ static struct platform_driver fsl_usb2_mph_dr_driver = {
         .remove = __devexit_p(fsl_usb2_mph_dr_of_remove),
 };
 
-static int __init fsl_usb2_mph_dr_init(void)
-{
-        return platform_driver_register(&fsl_usb2_mph_dr_driver);
-}
-module_init(fsl_usb2_mph_dr_init);
-
-static void __exit fsl_usb2_mph_dr_exit(void)
-{
-        platform_driver_unregister(&fsl_usb2_mph_dr_driver);
-}
-module_exit(fsl_usb2_mph_dr_exit);
+module_platform_driver(fsl_usb2_mph_dr_driver);
 
 MODULE_DESCRIPTION("FSL MPH DR OF devices driver");
 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>");
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
index 43b3ca48d75..104730dabd2 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -776,7 +776,6 @@ static int hwahc_probe(struct usb_interface *usb_iface,
                 goto error_alloc;
         }
         usb_hcd->wireless = 1;
-        set_bit(HCD_FLAG_SAW_IRQ, &usb_hcd->flags);
         wusbhc = usb_hcd_to_wusbhc(usb_hcd);
         hwahc = container_of(wusbhc, struct hwahc, wusbhc);
         hwahc_init(hwahc);
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index dbf0f156ed9..ff471c1c165 100644
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -1924,18 +1924,7 @@ static struct platform_driver imx21_hcd_driver = {
         .resume = NULL,
 };
 
-static int __init imx21_hcd_init(void)
-{
-        return platform_driver_register(&imx21_hcd_driver);
-}
-
-static void __exit imx21_hcd_cleanup(void)
-{
-        platform_driver_unregister(&imx21_hcd_driver);
-}
-
-module_init(imx21_hcd_init);
-module_exit(imx21_hcd_cleanup);
+module_platform_driver(imx21_hcd_driver);
 
 MODULE_DESCRIPTION("i.MX21 USB Host controller");
 MODULE_AUTHOR("Martin Fuzzey");
diff --git a/drivers/usb/host/isp1760-hcd.c b/drivers/usb/host/isp1760-hcd.c
index 27dfab80ed8..fc72d44bf78 100644
--- a/drivers/usb/host/isp1760-hcd.c
+++ b/drivers/usb/host/isp1760-hcd.c
@@ -32,6 +32,13 @@ static struct kmem_cache *qtd_cachep;
 static struct kmem_cache *qh_cachep;
 static struct kmem_cache *urb_listitem_cachep;
 
+enum queue_head_types {
+        QH_CONTROL,
+        QH_BULK,
+        QH_INTERRUPT,
+        QH_END
+};
+
 struct isp1760_hcd {
         u32 hcs_params;
         spinlock_t              lock;
@@ -40,7 +47,7 @@ struct isp1760_hcd {
         struct slotinfo         int_slots[32];
         int                     int_done_map;
         struct memory_chunk memory_pool[BLOCKS];
-        struct list_head        controlqhs, bulkqhs, interruptqhs;
+        struct list_head        qh_list[QH_END];
 
         /* periodic schedule support */
 #define DEFAULT_I_TDPS          1024
@@ -406,12 +413,12 @@ static int priv_init(struct usb_hcd *hcd)
 {
         struct isp1760_hcd              *priv = hcd_to_priv(hcd);
         u32                     hcc_params;
+        int i;
 
         spin_lock_init(&priv->lock);
 
-        INIT_LIST_HEAD(&priv->interruptqhs);
-        INIT_LIST_HEAD(&priv->controlqhs);
-        INIT_LIST_HEAD(&priv->bulkqhs);
+        for (i = 0; i < QH_END; i++)
+                INIT_LIST_HEAD(&priv->qh_list[i]);
 
         /*
          * hw default: 1K periodic list heads, one per frame.
@@ -930,9 +937,9 @@ void schedule_ptds(struct usb_hcd *hcd)
         struct isp1760_hcd *priv;
         struct isp1760_qh *qh, *qh_next;
         struct list_head *ep_queue;
-        struct usb_host_endpoint *ep;
         LIST_HEAD(urb_list);
         struct urb_listitem *urb_listitem, *urb_listitem_next;
+        int i;
 
         if (!hcd) {
                 WARN_ON(1);
@@ -944,28 +951,13 @@ void schedule_ptds(struct usb_hcd *hcd)
         /*
          * check finished/retired xfers, transfer payloads, call urb_done()
          */
-        ep_queue = &priv->interruptqhs;
-        while (ep_queue) {
+        for (i = 0; i < QH_END; i++) {
+                ep_queue = &priv->qh_list[i];
                 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list) {
-                        ep = list_entry(qh->qtd_list.next, struct isp1760_qtd,
-                                                        qtd_list)->urb->ep;
                         collect_qtds(hcd, qh, &urb_list);
-                        if (list_empty(&qh->qtd_list)) {
+                        if (list_empty(&qh->qtd_list))
                                 list_del(&qh->qh_list);
-                                if (ep->hcpriv == NULL) {
-                                        /* Endpoint has been disabled, so we
-                                        can free the associated queue head. */
-                                        qh_free(qh);
-                                }
-                        }
                 }
-
-                if (ep_queue == &priv->interruptqhs)
-                        ep_queue = &priv->controlqhs;
-                else if (ep_queue == &priv->controlqhs)
-                        ep_queue = &priv->bulkqhs;
-                else
-                        ep_queue = NULL;
         }
 
         list_for_each_entry_safe(urb_listitem, urb_listitem_next, &urb_list,
@@ -998,17 +990,10 @@ void schedule_ptds(struct usb_hcd *hcd)
          *
          * I'm sure this scheme could be improved upon!
          */
-        ep_queue = &priv->controlqhs;
-        while (ep_queue) {
+        for (i = 0; i < QH_END; i++) {
+                ep_queue = &priv->qh_list[i];
                 list_for_each_entry_safe(qh, qh_next, ep_queue, qh_list)
                         enqueue_qtds(hcd, qh);
-
-                if (ep_queue == &priv->controlqhs)
-                        ep_queue = &priv->interruptqhs;
-                else if (ep_queue == &priv->interruptqhs)
-                        ep_queue = &priv->bulkqhs;
-                else
-                        ep_queue = NULL;
         }
 }
 
@@ -1543,16 +1528,16 @@ static int isp1760_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
 
         switch (usb_pipetype(urb->pipe)) {
         case PIPE_CONTROL:
-                ep_queue = &priv->controlqhs;
+                ep_queue = &priv->qh_list[QH_CONTROL];
                 break;
         case PIPE_BULK:
-                ep_queue = &priv->bulkqhs;
+                ep_queue = &priv->qh_list[QH_BULK];
                 break;
         case PIPE_INTERRUPT:
                 if (urb->interval < 0)
                         return -EINVAL;
                 /* FIXME: Check bandwidth  */
-                ep_queue = &priv->interruptqhs;
+                ep_queue = &priv->qh_list[QH_INTERRUPT];
                 break;
         case PIPE_ISOCHRONOUS:
                 dev_err(hcd->self.controller, "%s: isochronous USB packets "
@@ -1714,8 +1699,8 @@ static void isp1760_endpoint_disable(struct usb_hcd *hcd,
 {
         struct isp1760_hcd *priv = hcd_to_priv(hcd);
         unsigned long spinflags;
-        struct isp1760_qh *qh;
-        struct isp1760_qtd *qtd;
+        struct isp1760_qh *qh, *qh_iter;
+        int i;
 
         spin_lock_irqsave(&priv->lock, spinflags);
 
@@ -1723,14 +1708,17 @@ static void isp1760_endpoint_disable(struct usb_hcd *hcd,
         if (!qh)
                 goto out;
 
-        list_for_each_entry(qtd, &qh->qtd_list, qtd_list)
-                if (qtd->status != QTD_RETIRE) {
-                        dequeue_urb_from_qtd(hcd, qh, qtd);
-                        qtd->urb->status = -ECONNRESET;
-                }
+        WARN_ON(!list_empty(&qh->qtd_list));
 
+        for (i = 0; i < QH_END; i++)
+                list_for_each_entry(qh_iter, &priv->qh_list[i], qh_list)
+                        if (qh_iter == qh) {
+                                list_del(&qh_iter->qh_list);
+                                i = QH_END;
+                                break;
+                        }
+        qh_free(qh);
         ep->hcpriv = NULL;
-        /* Cannot free qh here since it will be parsed by schedule_ptds() */
 
         schedule_ptds(hcd);
 
diff --git a/drivers/usb/host/isp1760-if.c b/drivers/usb/host/isp1760-if.c
index 2ac4ac2e4ef..4592dc17a9f 100644
--- a/drivers/usb/host/isp1760-if.c
+++ b/drivers/usb/host/isp1760-if.c
@@ -47,23 +47,27 @@ static int of_isp1760_probe(struct platform_device *dev)
         int virq;
         resource_size_t res_len;
         int ret;
-        const unsigned int *prop;
         unsigned int devflags = 0;
         enum of_gpio_flags gpio_flags;
+        u32 bus_width = 0;
 
         drvdata = kzalloc(sizeof(*drvdata), GFP_KERNEL);
         if (!drvdata)
                 return -ENOMEM;
 
         ret = of_address_to_resource(dp, 0, &memory);
-        if (ret)
-                return -ENXIO;
+        if (ret) {
+                ret = -ENXIO;
+                goto free_data;
+        }
 
         res_len = resource_size(&memory);
 
         res = request_mem_region(memory.start, res_len, dev_name(&dev->dev));
-        if (!res)
-                return -EBUSY;
+        if (!res) {
+                ret = -EBUSY;
+                goto free_data;
+        }
 
         if (of_irq_map_one(dp, 0, &oirq)) {
                 ret = -ENODEV;
@@ -77,8 +81,8 @@ static int of_isp1760_probe(struct platform_device *dev)
                 devflags |= ISP1760_FLAG_ISP1761;
 
         /* Some systems wire up only 16 of the 32 data lines */
-        prop = of_get_property(dp, "bus-width", NULL);
-        if (prop && *prop == 16)
+        of_property_read_u32(dp, "bus-width", &bus_width);
+        if (bus_width == 16)
                 devflags |= ISP1760_FLAG_BUS_WIDTH_16;
 
         if (of_get_property(dp, "port1-otg", NULL) != NULL)
@@ -125,6 +129,7 @@ free_gpio:
                 gpio_free(drvdata->rst_gpio);
 release_reg:
         release_mem_region(memory.start, res_len);
+free_data:
         kfree(drvdata);
         return ret;
 }
diff --git a/drivers/usb/host/ohci-au1xxx.c b/drivers/usb/host/ohci-au1xxx.c
index 9b66df8278f..40d886adff5 100644
--- a/drivers/usb/host/ohci-au1xxx.c
+++ b/drivers/usb/host/ohci-au1xxx.c
@@ -173,12 +173,9 @@ static int ohci_hcd_au1xxx_drv_suspend(struct device *dev)
          * mark HW unaccessible, bail out if RH has been resumed. Use
          * the spinlock to properly synchronize with possible pending
          * RH suspend or resume activity.
-         *
-         * This is still racy as hcd->state is manipulated outside of
-         * any locks =P But that will be a different fix.
          */
         spin_lock_irqsave(&ohci->lock, flags);
-        if (hcd->state != HC_STATE_SUSPENDED) {
+        if (ohci->rh_state != OHCI_RH_SUSPENDED) {
                 rc = -EINVAL;
                 goto bail;
         }
diff --git a/drivers/usb/host/ohci-dbg.c b/drivers/usb/host/ohci-dbg.c
index d7d34492934..5179fcd73d8 100644
--- a/drivers/usb/host/ohci-dbg.c
+++ b/drivers/usb/host/ohci-dbg.c
@@ -127,6 +127,19 @@ static char *hcfs2string (int state)
         return "?";
 }
 
+static const char *rh_state_string(struct ohci_hcd *ohci)
+{
+        switch (ohci->rh_state) {
+        case OHCI_RH_HALTED:
+                return "halted";
+        case OHCI_RH_SUSPENDED:
+                return "suspended";
+        case OHCI_RH_RUNNING:
+                return "running";
+        }
+        return "?";
+}
+
 // dump control and status registers
 static void
 ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size)
@@ -136,9 +149,10 @@ ohci_dump_status (struct ohci_hcd *controller, char **next, unsigned *size)
 
         temp = ohci_readl (controller, &regs->revision) & 0xff;
         ohci_dbg_sw (controller, next, size,
-                "OHCI %d.%d, %s legacy support registers\n",
+                "OHCI %d.%d, %s legacy support registers, rh state %s\n",
                 0x03 & (temp >> 4), (temp & 0x0f),
-                (temp & 0x0100) ? "with" : "NO");
+                (temp & 0x0100) ? "with" : "NO",
+                rh_state_string(controller));
 
         temp = ohci_readl (controller, &regs->control);
         ohci_dbg_sw (controller, next, size,
diff --git a/drivers/usb/host/ohci-ep93xx.c b/drivers/usb/host/ohci-ep93xx.c
index dc45d489d00..3d63574d2c7 100644
--- a/drivers/usb/host/ohci-ep93xx.c
+++ b/drivers/usb/host/ohci-ep93xx.c
@@ -179,8 +179,6 @@ static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_
         ohci->next_statechange = jiffies;
 
         ep93xx_stop_hc(&pdev->dev);
-        hcd->state = HC_STATE_SUSPENDED;
-
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
index b2639191549..4fa5d8c4d23 100644
--- a/drivers/usb/host/ohci-hcd.c
+++ b/drivers/usb/host/ohci-hcd.c
@@ -209,7 +209,7 @@ static int ohci_urb_enqueue (
                 retval = -ENODEV;
                 goto fail;
         }
-        if (!HC_IS_RUNNING(hcd->state)) {
+        if (ohci->rh_state != OHCI_RH_RUNNING) {
                 retval = -ENODEV;
                 goto fail;
         }
@@ -274,7 +274,7 @@ static int ohci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
         rc = usb_hcd_check_unlink_urb(hcd, urb, status);
         if (rc) {
                 ;       /* Do nothing */
-        } else if (HC_IS_RUNNING(hcd->state)) {
+        } else if (ohci->rh_state == OHCI_RH_RUNNING) {
                 urb_priv_t  *urb_priv;
 
                 /* Unless an IRQ completed the unlink while it was being
@@ -321,7 +321,7 @@ ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep)
 rescan:
         spin_lock_irqsave (&ohci->lock, flags);
 
-        if (!HC_IS_RUNNING (hcd->state)) {
+        if (ohci->rh_state != OHCI_RH_RUNNING) {
 sanitize:
                 ed->state = ED_IDLE;
                 if (quirk_zfmicro(ohci) && ed->type == PIPE_INTERRUPT)
@@ -377,6 +377,7 @@ static void ohci_usb_reset (struct ohci_hcd *ohci)
         ohci->hc_control = ohci_readl (ohci, &ohci->regs->control);
         ohci->hc_control &= OHCI_CTRL_RWC;
         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
+        ohci->rh_state = OHCI_RH_HALTED;
 }
 
 /* ohci_shutdown forcibly disables IRQs and DMA, helping kexec and
@@ -500,7 +501,7 @@ static int ohci_init (struct ohci_hcd *ohci)
         if (distrust_firmware)
                 ohci->flags |= OHCI_QUIRK_HUB_POWER;
 
-        disable (ohci);
+        ohci->rh_state = OHCI_RH_HALTED;
         ohci->regs = hcd->regs;
 
         /* REVISIT this BIOS handshake is now moved into PCI "quirks", and
@@ -575,7 +576,7 @@ static int ohci_run (struct ohci_hcd *ohci)
         int                     first = ohci->fminterval == 0;
         struct usb_hcd          *hcd = ohci_to_hcd(ohci);
 
-        disable (ohci);
+        ohci->rh_state = OHCI_RH_HALTED;
 
         /* boot firmware should have set this up (5.1.1.3.1) */
         if (first) {
@@ -688,7 +689,7 @@ retry:
         ohci->hc_control &= OHCI_CTRL_RWC;
         ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
         ohci_writel (ohci, ohci->hc_control, &ohci->regs->control);
-        hcd->state = HC_STATE_RUNNING;
+        ohci->rh_state = OHCI_RH_RUNNING;
 
         /* wake on ConnectStatusChange, matching external hubs */
         ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status);
@@ -725,7 +726,6 @@ retry:
 
         // POTPGT delay is bits 24-31, in 2 ms units.
         mdelay ((val >> 23) & 0x1fe);
-        hcd->state = HC_STATE_RUNNING;
 
         if (quirk_zfmicro(ohci)) {
                 /* Create timer to watch for bad queue state on ZF Micro */
@@ -761,7 +761,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
          * of dead, unclocked, or unplugged (CardBus...) devices
          */
         if (ints == ~(u32)0) {
-                disable (ohci);
+                ohci->rh_state = OHCI_RH_HALTED;
                 ohci_dbg (ohci, "device removed!\n");
                 usb_hc_died(hcd);
                 return IRQ_HANDLED;
@@ -771,7 +771,7 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
         ints &= ohci_readl(ohci, &regs->intrenable);
 
         /* interrupt for some other device? */
-        if (ints == 0 || unlikely(hcd->state == HC_STATE_HALT))
+        if (ints == 0 || unlikely(ohci->rh_state == OHCI_RH_HALTED))
                 return IRQ_NOTMINE;
 
         if (ints & OHCI_INTR_UE) {
@@ -786,8 +786,8 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
 
                         schedule_work (&ohci->nec_work);
                 } else {
-                        disable (ohci);
                         ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
+                        ohci->rh_state = OHCI_RH_HALTED;
                         usb_hc_died(hcd);
                 }
 
@@ -871,11 +871,11 @@ static irqreturn_t ohci_irq (struct usb_hcd *hcd)
         if ((ints & OHCI_INTR_SF) != 0
                         && !ohci->ed_rm_list
                         && !ohci->ed_to_check
-                        && HC_IS_RUNNING(hcd->state))
+                        && ohci->rh_state == OHCI_RH_RUNNING)
                 ohci_writel (ohci, OHCI_INTR_SF, &regs->intrdisable);
         spin_unlock (&ohci->lock);
 
-        if (HC_IS_RUNNING(hcd->state)) {
+        if (ohci->rh_state == OHCI_RH_RUNNING) {
                 ohci_writel (ohci, ints, &regs->intrstatus);
                 ohci_writel (ohci, OHCI_INTR_MIE, &regs->intrenable);
                 // flush those writes
@@ -929,7 +929,7 @@ static int ohci_restart (struct ohci_hcd *ohci)
         struct urb_priv *priv;
 
         spin_lock_irq(&ohci->lock);
-        disable (ohci);
+        ohci->rh_state = OHCI_RH_HALTED;
 
         /* Recycle any "live" eds/tds (and urbs). */
         if (!list_empty (&ohci->pending))
@@ -1111,7 +1111,7 @@ MODULE_LICENSE ("GPL");
 #define PLATFORM_DRIVER         ohci_hcd_ath79_driver
 #endif
 
-#ifdef CONFIG_NLM_XLR
+#ifdef CONFIG_CPU_XLR
 #include "ohci-xls.c"
 #define PLATFORM_DRIVER         ohci_xls_driver
 #endif
diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index 2f00040fc40..836772dfabd 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -111,6 +111,7 @@ __acquires(ohci->lock)
         if (!autostop) {
                 ohci->next_statechange = jiffies + msecs_to_jiffies (5);
                 ohci->autostop = 0;
+                ohci->rh_state = OHCI_RH_SUSPENDED;
         }
 
 done:
@@ -140,7 +141,7 @@ __acquires(ohci->lock)
 
         if (ohci->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) {
                 /* this can happen after resuming a swsusp snapshot */
-                if (hcd->state == HC_STATE_RESUMING) {
+                if (ohci->rh_state != OHCI_RH_RUNNING) {
                         ohci_dbg (ohci, "BIOS/SMM active, control %03x\n",
                                         ohci->hc_control);
                         status = -EBUSY;
@@ -274,6 +275,7 @@ skip_resume:
                 (void) ohci_readl (ohci, &ohci->regs->control);
         }
 
+        ohci->rh_state = OHCI_RH_RUNNING;
         return 0;
 }
 
@@ -336,11 +338,8 @@ static void ohci_finish_controller_resume(struct usb_hcd *hcd)
         /* If needed, reinitialize and suspend the root hub */
         if (need_reinit) {
                 spin_lock_irq(&ohci->lock);
-                hcd->state = HC_STATE_RESUMING;
                 ohci_rh_resume(ohci);
-                hcd->state = HC_STATE_QUIESCING;
                 ohci_rh_suspend(ohci, 0);
-                hcd->state = HC_STATE_SUSPENDED;
                 spin_unlock_irq(&ohci->lock);
         }
 
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index e4b8782cc6e..db3968656d2 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -516,7 +516,6 @@ static int ohci_omap_suspend(struct platform_device *dev, pm_message_t message)
         ohci->next_statechange = jiffies;
 
         omap_ohci_clock_power(0);
-        ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index bc01b064585..6109810cc2d 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -308,12 +308,9 @@ static int ohci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
          * mark HW unaccessible, bail out if RH has been resumed. Use
          * the spinlock to properly synchronize with possible pending
          * RH suspend or resume activity.
-         *
-         * This is still racy as hcd->state is manipulated outside of
-         * any locks =P But that will be a different fix.
          */
         spin_lock_irqsave (&ohci->lock, flags);
-        if (hcd->state != HC_STATE_SUSPENDED) {
+        if (ohci->rh_state != OHCI_RH_SUSPENDED) {
                 rc = -EINVAL;
                 goto bail;
         }
diff --git a/drivers/usb/host/ohci-pxa27x.c b/drivers/usb/host/ohci-pxa27x.c
index 29dfefe1c72..6313e4439f3 100644
--- a/drivers/usb/host/ohci-pxa27x.c
+++ b/drivers/usb/host/ohci-pxa27x.c
@@ -502,8 +502,6 @@ static int ohci_hcd_pxa27x_drv_suspend(struct device *dev)
         ohci->ohci.next_statechange = jiffies;
 
         pxa27x_stop_hc(ohci, dev);
-        hcd->state = HC_STATE_SUSPENDED;
-
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index 15dc51ded61..c5a1ea9145f 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -912,7 +912,7 @@ rescan_all:
                 /* only take off EDs that the HC isn't using, accounting for
                  * frame counter wraps and EDs with partially retired TDs
                  */
-                if (likely (HC_IS_RUNNING(ohci_to_hcd(ohci)->state))) {
+                if (likely(ohci->rh_state == OHCI_RH_RUNNING)) {
                         if (tick_before (tick, ed->tick)) {
 skip_ed:
                                 last = &ed->ed_next;
@@ -1012,7 +1012,7 @@ rescan_this:
 
                 /* but if there's work queued, reschedule */
                 if (!list_empty (&ed->td_list)) {
-                        if (HC_IS_RUNNING(ohci_to_hcd(ohci)->state))
+                        if (ohci->rh_state == OHCI_RH_RUNNING)
                                 ed_schedule (ohci, ed);
                 }
 
@@ -1021,9 +1021,7 @@ rescan_this:
         }
 
         /* maybe reenable control and bulk lists */
-        if (HC_IS_RUNNING(ohci_to_hcd(ohci)->state)
-                        && ohci_to_hcd(ohci)->state != HC_STATE_QUIESCING
-                        && !ohci->ed_rm_list) {
+        if (ohci->rh_state == OHCI_RH_RUNNING && !ohci->ed_rm_list) {
                 u32     command = 0, control = 0;
 
                 if (ohci->ed_controltail) {
diff --git a/drivers/usb/host/ohci-s3c2410.c b/drivers/usb/host/ohci-s3c2410.c
index a1877c47601..56dcf069246 100644
--- a/drivers/usb/host/ohci-s3c2410.c
+++ b/drivers/usb/host/ohci-s3c2410.c
@@ -486,15 +486,66 @@ static int __devexit ohci_hcd_s3c2410_drv_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM
+static int ohci_hcd_s3c2410_drv_suspend(struct device *dev)
+{
+        struct usb_hcd *hcd = dev_get_drvdata(dev);
+        struct ohci_hcd *ohci = hcd_to_ohci(hcd);
+        struct platform_device *pdev = to_platform_device(dev);
+        unsigned long flags;
+        int rc = 0;
+
+        /*
+         * Root hub was already suspended. Disable irq emission and
+         * mark HW unaccessible, bail out if RH has been resumed. Use
+         * the spinlock to properly synchronize with possible pending
+         * RH suspend or resume activity.
+         */
+        spin_lock_irqsave(&ohci->lock, flags);
+        if (ohci->rh_state != OHCI_RH_SUSPENDED) {
+                rc = -EINVAL;
+                goto bail;
+        }
+
+        clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+
+        s3c2410_stop_hc(pdev);
+bail:
+        spin_unlock_irqrestore(&ohci->lock, flags);
+
+        return rc;
+}
+
+static int ohci_hcd_s3c2410_drv_resume(struct device *dev)
+{
+        struct usb_hcd *hcd = dev_get_drvdata(dev);
+        struct platform_device *pdev = to_platform_device(dev);
+
+        s3c2410_start_hc(pdev, hcd);
+
+        set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
+        ohci_finish_controller_resume(hcd);
+
+        return 0;
+}
+#else
+#define ohci_hcd_s3c2410_drv_suspend    NULL
+#define ohci_hcd_s3c2410_drv_resume     NULL
+#endif
+
+static const struct dev_pm_ops ohci_hcd_s3c2410_pm_ops = {
+        .suspend        = ohci_hcd_s3c2410_drv_suspend,
+        .resume         = ohci_hcd_s3c2410_drv_resume,
+};
+
 static struct platform_driver ohci_hcd_s3c2410_driver = {
         .probe          = ohci_hcd_s3c2410_drv_probe,
         .remove         = __devexit_p(ohci_hcd_s3c2410_drv_remove),
         .shutdown       = usb_hcd_platform_shutdown,
-        /*.suspend      = ohci_hcd_s3c2410_drv_suspend, */
-        /*.resume       = ohci_hcd_s3c2410_drv_resume, */
         .driver         = {
                 .owner  = THIS_MODULE,
                 .name   = "s3c2410-ohci",
+                .pm     = &ohci_hcd_s3c2410_pm_ops,
         },
 };
 
diff --git a/drivers/usb/host/ohci-sh.c b/drivers/usb/host/ohci-sh.c
index afc4eb6bb9d..84686d90805 100644
--- a/drivers/usb/host/ohci-sh.c
+++ b/drivers/usb/host/ohci-sh.c
@@ -29,7 +29,6 @@ static int ohci_sh_start(struct usb_hcd *hcd)
         ohci_hcd_init(ohci);
         ohci_init(ohci);
         ohci_run(ohci);
-        hcd->state = HC_STATE_RUNNING;
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-sm501.c b/drivers/usb/host/ohci-sm501.c
index 968cea2b6d4..5596ac2ba1c 100644
--- a/drivers/usb/host/ohci-sm501.c
+++ b/drivers/usb/host/ohci-sm501.c
@@ -224,7 +224,6 @@ static int ohci_sm501_suspend(struct platform_device *pdev, pm_message_t msg)
         ohci->next_statechange = jiffies;
 
         sm501_unit_power(dev->parent, SM501_GATE_USB_HOST, 0);
-        ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-spear.c b/drivers/usb/host/ohci-spear.c
index 69874654f3b..95c16489e88 100644
--- a/drivers/usb/host/ohci-spear.c
+++ b/drivers/usb/host/ohci-spear.c
@@ -203,7 +203,6 @@ static int spear_ohci_hcd_drv_suspend(struct platform_device *dev,
         ohci->next_statechange = jiffies;
 
         spear_stop_ohci(ohci_p);
-        ohci_to_hcd(ohci)->state = HC_STATE_SUSPENDED;
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-tmio.c b/drivers/usb/host/ohci-tmio.c
index 06331d93117..120bfe6ede3 100644
--- a/drivers/usb/host/ohci-tmio.c
+++ b/drivers/usb/host/ohci-tmio.c
@@ -318,9 +318,6 @@ static int ohci_hcd_tmio_drv_suspend(struct platform_device *dev, pm_message_t s
                 if (ret)
                         return ret;
         }
-
-        hcd->state = HC_STATE_SUSPENDED;
-
         return 0;
 }
 
diff --git a/drivers/usb/host/ohci-xls.c b/drivers/usb/host/ohci-xls.c
index a3a9c6f45b9..a2247867af8 100644
--- a/drivers/usb/host/ohci-xls.c
+++ b/drivers/usb/host/ohci-xls.c
@@ -40,7 +40,7 @@ static int ohci_xls_probe_internal(const struct hc_driver *driver,
                 goto err1;
         }
         hcd->rsrc_start = res->start;
-        hcd->rsrc_len = res->end - res->start + 1;
+        hcd->rsrc_len = resource_size(res);
 
         if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
                         driver->description)) {
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 0795b934d00..8ff6f7ea96f 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -344,6 +344,12 @@ typedef struct urb_priv {
  * a subset of what the full implementation needs. (Linus)
  */
 
+enum ohci_rh_state {
+        OHCI_RH_HALTED,
+        OHCI_RH_SUSPENDED,
+        OHCI_RH_RUNNING
+};
+
 struct ohci_hcd {
         spinlock_t              lock;
 
@@ -384,6 +390,7 @@ struct ohci_hcd {
         /*
          * driver state
          */
+        enum ohci_rh_state      rh_state;
         int                     num_ports;
         int                     load [NUM_INTS];
         u32                     hc_control;     /* copy of hc control reg */
@@ -679,11 +686,6 @@ static inline u16 ohci_hwPSW(const struct ohci_hcd *ohci,
 
 /*-------------------------------------------------------------------------*/
 
-static inline void disable (struct ohci_hcd *ohci)
-{
-        ohci_to_hcd(ohci)->state = HC_STATE_HALT;
-}
-
 #define FI                      0x2edf          /* 12000 bits per frame (-1) */
 #define FSMP(fi)                (0x7fff & ((6 * ((fi) - 210)) / 7))
 #define FIT                     (1 << 31)
@@ -707,7 +709,7 @@ static inline void periodic_reinit (struct ohci_hcd *ohci)
 #define read_roothub(hc, register, mask) ({ \
         u32 temp = ohci_readl (hc, &hc->regs->roothub.register); \
         if (temp == -1) \
-                disable (hc); \
+                hc->rh_state = OHCI_RH_HALTED; \
         else if (hc->flags & OHCI_QUIRK_AMD756) \
                 while (temp & mask) \
                         temp = ohci_readl (hc, &hc->regs->roothub.register); \
diff --git a/drivers/usb/host/oxu210hp-hcd.c b/drivers/usb/host/oxu210hp-hcd.c
index dcd889803f0..6f62de5c6e3 100644
--- a/drivers/usb/host/oxu210hp-hcd.c
+++ b/drivers/usb/host/oxu210hp-hcd.c
@@ -3951,24 +3951,7 @@ static struct platform_driver oxu_driver = {
         }
 };
 
-static int __init oxu_module_init(void)
-{
-        int retval = 0;
-
-        retval = platform_driver_register(&oxu_driver);
-        if (retval < 0)
-                return retval;
-
-        return retval;
-}
-
-static void __exit oxu_module_cleanup(void)
-{
-        platform_driver_unregister(&oxu_driver);
-}
-
-module_init(oxu_module_init);
-module_exit(oxu_module_cleanup);
+module_platform_driver(oxu_driver);
 
 MODULE_DESCRIPTION("Oxford OXU210HP HCD driver - ver. " DRIVER_VERSION);
 MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>");
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index f6ca80ee4ce..d2c6f5ac462 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -943,7 +943,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
         if (usb_pipein(urb->pipe))
                 status |= TD_CTRL_SPD;
 
-        i = urb->num_sgs;
+        i = urb->num_mapped_sgs;
         if (len > 0 && i > 0) {
                 sg = urb->sg;
                 data = sg_dma_address(sg);
diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
index a403b53e86b..76083ae9213 100644
--- a/drivers/usb/host/whci/qset.c
+++ b/drivers/usb/host/whci/qset.c
@@ -443,7 +443,7 @@ static int qset_add_urb_sg(struct whc *whc, struct whc_qset *qset, struct urb *u
 
         remaining = urb->transfer_buffer_length;
 
-        for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+        for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
                 dma_addr_t dma_addr;
                 size_t dma_remaining;
                 dma_addr_t sp, ep;
@@ -561,7 +561,7 @@ static int qset_add_urb_sg_linearize(struct whc *whc, struct whc_qset *qset,
 
         remaining = urb->transfer_buffer_length;
 
-        for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+        for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
                 size_t len;
                 size_t sg_remaining;
                 void *orig;
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 430e88fd3f6..35e257f79c7 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -57,17 +57,15 @@ static void xhci_common_hub_descriptor(struct xhci_hcd *xhci,
         desc->bHubContrCurrent = 0;
 
         desc->bNbrPorts = ports;
-        /* 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 */
+        /* Bits 1:0 - support per-port power switching, or power always on */
         if (HCC_PPC(xhci->hcc_params))
-                temp |= 0x0001;
+                temp |= HUB_CHAR_INDV_PORT_LPSM;
         else
-                temp |= 0x0002;
+                temp |= HUB_CHAR_NO_LPSM;
         /* Bit  2 - root hubs are not part of a compound device */
         /* Bits 4:3 - individual port over current protection */
-        temp |= 0x0008;
+        temp |= HUB_CHAR_INDV_PORT_OCPM;
         /* Bits 6:5 - no TTs in root ports */
         /* Bit  7 - no port indicators */
         desc->wHubCharacteristics = cpu_to_le16(temp);
@@ -86,9 +84,9 @@ static void xhci_usb2_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
         ports = xhci->num_usb2_ports;
 
         xhci_common_hub_descriptor(xhci, desc, ports);
-        desc->bDescriptorType = 0x29;
+        desc->bDescriptorType = USB_DT_HUB;
         temp = 1 + (ports / 8);
-        desc->bDescLength = 7 + 2 * temp;
+        desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp;
 
         /* The Device Removable bits are reported on a byte granularity.
          * If the port doesn't exist within that byte, the bit is set to 0.
@@ -137,8 +135,8 @@ static void xhci_usb3_hub_descriptor(struct usb_hcd *hcd, struct xhci_hcd *xhci,
 
         ports = xhci->num_usb3_ports;
         xhci_common_hub_descriptor(xhci, desc, ports);
-        desc->bDescriptorType = 0x2a;
-        desc->bDescLength = 12;
+        desc->bDescriptorType = USB_DT_SS_HUB;
+        desc->bDescLength = USB_DT_SS_HUB_SIZE;
 
         /* header decode latency should be zero for roothubs,
          * see section 4.23.5.2.
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 0e4b25fa3bc..36cbe2226a4 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -42,15 +42,12 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, gfp_t flag
         seg = kzalloc(sizeof *seg, flags);
         if (!seg)
                 return NULL;
-        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 NULL;
         }
-        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;
@@ -62,12 +59,9 @@ static struct xhci_segment *xhci_segment_alloc(struct xhci_hcd *xhci, gfp_t flag
 static void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
 {
         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);
 }
 
@@ -101,9 +95,6 @@ static void xhci_link_segments(struct xhci_hcd *xhci, struct xhci_segment *prev,
                         val |= TRB_CHAIN;
                 prev->trbs[TRBS_PER_SEGMENT-1].link.control = cpu_to_le32(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? */
@@ -117,7 +108,6 @@ void xhci_ring_free(struct xhci_hcd *xhci, struct xhci_ring *ring)
         if (ring->first_seg) {
                 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);
@@ -160,7 +150,6 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
         struct xhci_segment     *prev;
 
         ring = kzalloc(sizeof *(ring), flags);
-        xhci_dbg(xhci, "Allocating ring at %p\n", ring);
         if (!ring)
                 return NULL;
 
@@ -191,9 +180,6 @@ static struct xhci_ring *xhci_ring_alloc(struct xhci_hcd *xhci,
                 /* See section 4.9.2.1 and 6.4.4.1 */
                 prev->trbs[TRBS_PER_SEGMENT-1].link.control |=
                         cpu_to_le32(LINK_TOGGLE);
-                xhci_dbg(xhci, "Wrote link toggle flag to"
-                                " segment %p (virtual), 0x%llx (DMA)\n",
-                                prev, (unsigned long long)prev->dma);
         }
         xhci_initialize_ring_info(ring);
         return ring;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9f1d4b15d81..b90e1386418 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -155,10 +155,6 @@ static void inc_deq(struct xhci_hcd *xhci, struct xhci_ring *ring, bool consumer
         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;
@@ -231,10 +227,6 @@ static void inc_enq(struct xhci_hcd *xhci, struct xhci_ring *ring,
                         /* 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;
@@ -560,12 +552,9 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
                                         cpu_to_le32(TRB_CYCLE);
                         cur_trb->generic.field[3] |= cpu_to_le32(
                                 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);
+                        xhci_dbg(xhci, "TRB to noop at offset 0x%llx\n",
+                                        (unsigned long long)
+                                        xhci_trb_virt_to_dma(cur_seg, cur_trb));
                 }
                 if (cur_trb == cur_td->last_trb)
                         break;
@@ -705,9 +694,9 @@ static void handle_stopped_endpoint(struct xhci_hcd *xhci,
          */
         list_for_each(entry, &ep->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));
+                xhci_dbg(xhci, "Removing canceled TD starting at 0x%llx (dma).\n",
+                                (unsigned long long)xhci_trb_virt_to_dma(
+                                        cur_td->start_seg, cur_td->first_trb));
                 ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb);
                 if (!ep_ring) {
                         /* This shouldn't happen unless a driver is mucking
@@ -1627,7 +1616,6 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
         ep_ctx = xhci_get_ep_ctx(xhci, xdev->out_ctx, ep_index);
         trb_comp_code = GET_COMP_CODE(le32_to_cpu(event->transfer_len));
 
-        xhci_debug_trb(xhci, xhci->event_ring->dequeue);
         switch (trb_comp_code) {
         case COMP_SUCCESS:
                 if (event_trb == ep_ring->dequeue) {
@@ -1643,7 +1631,6 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
                 }
                 break;
         case COMP_SHORT_TX:
-                xhci_warn(xhci, "WARN: short transfer on control ep\n");
                 if (td->urb->transfer_flags & URB_SHORT_NOT_OK)
                         *status = -EREMOTEIO;
                 else
@@ -1946,6 +1933,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
         xdev = xhci->devs[slot_id];
         if (!xdev) {
                 xhci_err(xhci, "ERROR Transfer event pointed to bad slot\n");
+                xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n",
+                         (unsigned long long) xhci_trb_virt_to_dma(
+                                 xhci->event_ring->deq_seg,
+                                 xhci->event_ring->dequeue),
+                         lower_32_bits(le64_to_cpu(event->buffer)),
+                         upper_32_bits(le64_to_cpu(event->buffer)),
+                         le32_to_cpu(event->transfer_len),
+                         le32_to_cpu(event->flags));
+                xhci_dbg(xhci, "Event ring:\n");
+                xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
                 return -ENODEV;
         }
 
@@ -1959,6 +1956,16 @@ static int handle_tx_event(struct xhci_hcd *xhci,
             EP_STATE_DISABLED) {
                 xhci_err(xhci, "ERROR Transfer event for disabled endpoint "
                                 "or incorrect stream ring\n");
+                xhci_err(xhci, "@%016llx %08x %08x %08x %08x\n",
+                         (unsigned long long) xhci_trb_virt_to_dma(
+                                 xhci->event_ring->deq_seg,
+                                 xhci->event_ring->dequeue),
+                         lower_32_bits(le64_to_cpu(event->buffer)),
+                         upper_32_bits(le64_to_cpu(event->buffer)),
+                         le32_to_cpu(event->transfer_len),
+                         le32_to_cpu(event->flags));
+                xhci_dbg(xhci, "Event ring:\n");
+                xhci_debug_segment(xhci, xhci->event_ring->deq_seg);
                 return -ENODEV;
         }
 
@@ -1985,7 +1992,7 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                 xhci_dbg(xhci, "Stopped on No-op or Link TRB\n");
                 break;
         case COMP_STALL:
-                xhci_warn(xhci, "WARN: Stalled endpoint\n");
+                xhci_dbg(xhci, "Stalled endpoint\n");
                 ep->ep_state |= EP_HALTED;
                 status = -EPIPE;
                 break;
@@ -1995,11 +2002,11 @@ static int handle_tx_event(struct xhci_hcd *xhci,
                 break;
         case COMP_SPLIT_ERR:
         case COMP_TX_ERR:
-                xhci_warn(xhci, "WARN: transfer error on endpoint\n");
+                xhci_dbg(xhci, "Transfer error on endpoint\n");
                 status = -EPROTO;
                 break;
         case COMP_BABBLE:
-                xhci_warn(xhci, "WARN: babble error on endpoint\n");
+                xhci_dbg(xhci, "Babble error on endpoint\n");
                 status = -EOVERFLOW;
                 break;
         case COMP_DB_ERR:
@@ -2390,17 +2397,7 @@ hw_died:
 
 irqreturn_t xhci_msi_irq(int irq, struct usb_hcd *hcd)
 {
-        irqreturn_t ret;
-        struct xhci_hcd *xhci;
-
-        xhci = hcd_to_xhci(hcd);
-        set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
-        if (xhci->shared_hcd)
-                set_bit(HCD_FLAG_SAW_IRQ, &xhci->shared_hcd->flags);
-
-        ret = xhci_irq(hcd);
-
-        return ret;
+        return xhci_irq(hcd);
 }
 
 /****           Endpoint Ring Operations        ****/
@@ -2488,11 +2485,6 @@ static int prepare_ring(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
                         /* 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, "queue_trb: 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;
@@ -2561,13 +2553,11 @@ static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb)
         struct scatterlist *sg;
 
         sg = NULL;
-        num_sgs = urb->num_sgs;
+        num_sgs = urb->num_mapped_sgs;
         temp = urb->transfer_buffer_length;
 
-        xhci_dbg(xhci, "count sg list trbs: \n");
         num_trbs = 0;
         for_each_sg(urb->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 */
@@ -2582,22 +2572,11 @@ static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb)
                         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())
-                xhci_dbg(xhci, "ep %#x - urb len = %d, sglist used, "
-                                "num_trbs = %d\n",
-                                urb->ep->desc.bEndpointAddress,
-                                urb->transfer_buffer_length,
-                                num_trbs);
         return num_trbs;
 }
 
@@ -2745,7 +2724,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
                 return -EINVAL;
 
         num_trbs = count_sg_trbs_needed(xhci, urb);
-        num_sgs = urb->num_sgs;
+        num_sgs = urb->num_mapped_sgs;
         total_packet_count = roundup(urb->transfer_buffer_length,
                         usb_endpoint_maxp(&urb->ep->desc));
 
@@ -2783,8 +2762,6 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
         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 */
@@ -2816,11 +2793,6 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
                 if (usb_urb_dir_in(urb))
                         field |= TRB_ISP;
 
-                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 & (TRB_MAX_BUFF_SIZE - 1)) < trb_buff_len) {
                         xhci_warn(xhci, "WARN: sg dma xfer crosses 64KB boundaries!\n");
@@ -2926,15 +2898,6 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
         }
         /* FIXME: this doesn't deal with URB_ZERO_PACKET - need one more */
 
-        if (!in_interrupt())
-                xhci_dbg(xhci, "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, urb->stream_id,
                         num_trbs, urb, 0, false, mem_flags);
@@ -3055,9 +3018,6 @@ int xhci_queue_ctrl_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
         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;
         /*
@@ -3249,15 +3209,6 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
                 return -EINVAL;
         }
 
-        if (!in_interrupt())
-                xhci_dbg(xhci, "ep %#x - urb len = %#x (%d),"
-                                " addr = %#llx, num_tds = %d\n",
-                                urb->ep->desc.bEndpointAddress,
-                                urb->transfer_buffer_length,
-                                urb->transfer_buffer_length,
-                                (unsigned long long)urb->transfer_dma,
-                                num_tds);
-
         start_addr = (u64) urb->transfer_dma;
         start_trb = &ep_ring->enqueue->generic;
         start_cycle = ep_ring->cycle_state;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index a1afb7c39f7..6bbe3c3a711 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -200,14 +200,14 @@ static int xhci_setup_msi(struct xhci_hcd *xhci)
 
         ret = pci_enable_msi(pdev);
         if (ret) {
-                xhci_err(xhci, "failed to allocate MSI entry\n");
+                xhci_dbg(xhci, "failed to allocate MSI entry\n");
                 return ret;
         }
 
         ret = request_irq(pdev->irq, (irq_handler_t)xhci_msi_irq,
                                 0, "xhci_hcd", xhci_to_hcd(xhci));
         if (ret) {
-                xhci_err(xhci, "disable MSI interrupt\n");
+                xhci_dbg(xhci, "disable MSI interrupt\n");
                 pci_disable_msi(pdev);
         }
 
@@ -270,7 +270,7 @@ static int xhci_setup_msix(struct xhci_hcd *xhci)
 
         ret = pci_enable_msix(pdev, xhci->msix_entries, xhci->msix_count);
         if (ret) {
-                xhci_err(xhci, "Failed to enable MSI-X\n");
+                xhci_dbg(xhci, "Failed to enable MSI-X\n");
                 goto free_entries;
         }
 
@@ -286,7 +286,7 @@ static int xhci_setup_msix(struct xhci_hcd *xhci)
         return ret;
 
 disable_msix:
-        xhci_err(xhci, "disable MSI-X interrupt\n");
+        xhci_dbg(xhci, "disable MSI-X interrupt\n");
         xhci_free_irq(xhci);
         pci_disable_msix(pdev);
 free_entries:
@@ -1333,9 +1333,6 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
                 goto done;
         }
 
-        xhci_dbg(xhci, "Cancel URB %p\n", urb);
-        xhci_dbg(xhci, "Event ring:\n");
-        xhci_debug_ring(xhci, xhci->event_ring);
         ep_index = xhci_get_endpoint_index(&urb->ep->desc);
         ep = &xhci->devs[urb->dev->slot_id]->eps[ep_index];
         ep_ring = xhci_urb_to_transfer_ring(xhci, urb);
@@ -1344,12 +1341,18 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
                 goto done;
         }
 
-        xhci_dbg(xhci, "Endpoint ring:\n");
-        xhci_debug_ring(xhci, ep_ring);
-
         urb_priv = urb->hcpriv;
-
-        for (i = urb_priv->td_cnt; i < urb_priv->length; i++) {
+        i = urb_priv->td_cnt;
+        if (i < urb_priv->length)
+                xhci_dbg(xhci, "Cancel URB %p, dev %s, ep 0x%x, "
+                                "starting at offset 0x%llx\n",
+                                urb, urb->dev->devpath,
+                                urb->ep->desc.bEndpointAddress,
+                                (unsigned long long) xhci_trb_virt_to_dma(
+                                        urb_priv->td[i]->start_seg,
+                                        urb_priv->td[i]->first_trb));
+
+        for (; i < urb_priv->length; i++) {
                 td = urb_priv->td[i];
                 list_add_tail(&td->cancelled_td_list, &ep->cancelled_td_list);
         }
@@ -1620,6 +1623,7 @@ static int xhci_configure_endpoint_result(struct xhci_hcd *xhci,
                 /* FIXME: can we allocate more resources for the HC? */
                 break;
         case COMP_BW_ERR:
+        case COMP_2ND_BW_ERR:
                 dev_warn(&udev->dev, "Not enough bandwidth "
                                 "for new device state.\n");
                 ret = -ENOSPC;
@@ -2796,8 +2800,7 @@ static int xhci_calculate_streams_and_bitmask(struct xhci_hcd *xhci,
                 if (ret < 0)
                         return ret;
 
-                max_streams = USB_SS_MAX_STREAMS(
-                                eps[i]->ss_ep_comp.bmAttributes);
+                max_streams = usb_ss_max_streams(&eps[i]->ss_ep_comp);
                 if (max_streams < (*num_streams - 1)) {
                         xhci_dbg(xhci, "Ep 0x%x only supports %u stream IDs.\n",
                                         eps[i]->desc.bEndpointAddress,
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 3c8fbd2772e..fb99c837914 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1033,7 +1033,6 @@ struct xhci_transfer_event {
 /* 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
@@ -1356,7 +1355,7 @@ static inline unsigned int hcd_index(struct usb_hcd *hcd)
                 return 1;
 }
 
-/* There is one ehci_hci structure per controller */
+/* There is one xhci_hcd structure per controller */
 struct xhci_hcd {
         struct usb_hcd *main_hcd;
         struct usb_hcd *shared_hcd;
diff --git a/drivers/usb/misc/isight_firmware.c b/drivers/usb/misc/isight_firmware.c
index 1dc7e9581cc..1c61830e96f 100644
--- a/drivers/usb/misc/isight_firmware.c
+++ b/drivers/usb/misc/isight_firmware.c
@@ -55,8 +55,9 @@ static int isight_firmware_load(struct usb_interface *intf,
 
         ptr = firmware->data;
 
+        buf[0] = 0x01;
         if (usb_control_msg
-            (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, "\1", 1,
+            (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
              300) != 1) {
                 printk(KERN_ERR
                        "Failed to initialise isight firmware loader\n");
@@ -100,8 +101,9 @@ static int isight_firmware_load(struct usb_interface *intf,
                 }
         }
 
+        buf[0] = 0x00;
         if (usb_control_msg
-            (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, "\0", 1,
+            (dev, usb_sndctrlpipe(dev, 0), 0xa0, 0x40, 0xe600, 0, buf, 1,
              300) != 1) {
                 printk(KERN_ERR "isight firmware loading completion failed\n");
                 ret = -ENODEV;
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index bd6d00802ea..959145baf3c 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -1765,7 +1765,6 @@ static int test_unaligned_bulk(
  * off just killing the userspace task and waiting for it to exit.
  */
 
-/* No BKL needed */
 static int
 usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
 {
diff --git a/drivers/usb/musb/Kconfig b/drivers/usb/musb/Kconfig
index 07a03460a59..f70cab3beee 100644
--- a/drivers/usb/musb/Kconfig
+++ b/drivers/usb/musb/Kconfig
@@ -5,14 +5,13 @@
 
 # (M)HDRC = (Multipoint) Highspeed Dual-Role Controller
 config USB_MUSB_HDRC
+        tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
         depends on USB && USB_GADGET
-        depends on (ARM || (BF54x && !BF544) || (BF52x && !BF522 && !BF523))
         select NOP_USB_XCEIV if (ARCH_DAVINCI || MACH_OMAP3EVM || BLACKFIN)
         select TWL4030_USB if MACH_OMAP_3430SDP
         select TWL6030_USB if MACH_OMAP_4430SDP || MACH_OMAP4_PANDA
         select USB_OTG_UTILS
         select USB_GADGET_DUALSPEED
-        tristate 'Inventra Highspeed Dual Role Controller (TI, ADI, ...)'
         help
           Say Y here if your system has a dual role high speed USB
           controller based on the Mentor Graphics silicon IP.  Then
@@ -31,9 +30,10 @@ config USB_MUSB_HDRC
           To compile this driver as a module, choose M here; the
           module will be called "musb-hdrc".
 
+if USB_MUSB_HDRC
+
 choice
         prompt "Platform Glue Layer"
-        depends on USB_MUSB_HDRC
 
 config USB_MUSB_DAVINCI
         tristate "DaVinci"
@@ -45,7 +45,6 @@ config USB_MUSB_DA8XX
 
 config USB_MUSB_TUSB6010
         tristate "TUSB6010"
-        depends on ARCH_OMAP
 
 config USB_MUSB_OMAP2PLUS
         tristate "OMAP2430 and onwards"
@@ -65,46 +64,54 @@ config USB_MUSB_UX500
 
 endchoice
 
-config MUSB_PIO_ONLY
-        bool 'Disable DMA (always use PIO)'
-        depends on USB_MUSB_HDRC
-        default USB_MUSB_TUSB6010 || USB_MUSB_DA8XX || USB_MUSB_AM35X
+choice
+        prompt 'MUSB DMA mode'
+        default USB_UX500_DMA if USB_MUSB_UX500
+        default USB_INVENTRA_DMA if USB_MUSB_OMAP2PLUS || USB_MUSB_BLACKFIN
+        default USB_TI_CPPI_DMA if USB_MUSB_DAVINCI
+        default USB_TUSB_OMAP_DMA if USB_MUSB_TUSB6010
+        default MUSB_PIO_ONLY if USB_MUSB_TUSB6010 || USB_MUSB_DA8XX || USB_MUSB_AM35X
         help
-          All data is copied between memory and FIFO by the CPU.
-          DMA controllers are ignored.
-
-          Do not select 'n' here unless DMA support for your SOC or board
-          is unavailable (or unstable).  When DMA is enabled at compile time,
-          you can still disable it at run time using the "use_dma=n" module
-          parameter.
+          Unfortunately, only one option can be enabled here. Ideally one
+          should be able to build all these drivers into one kernel to
+          allow using DMA on multiplatform kernels.
 
 config USB_UX500_DMA
-        bool
-        depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
-        default USB_MUSB_UX500
+        bool 'ST Ericsson U8500 and U5500'
+        depends on USB_MUSB_UX500
         help
           Enable DMA transfers on UX500 platforms.
 
 config USB_INVENTRA_DMA
-        bool
-        depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
-        default USB_MUSB_OMAP2PLUS || USB_MUSB_BLACKFIN
+        bool 'Inventra'
+        depends on USB_MUSB_OMAP2PLUS || USB_MUSB_BLACKFIN
         help
           Enable DMA transfers using Mentor's engine.
 
 config USB_TI_CPPI_DMA
-        bool
-        depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
-        default USB_MUSB_DAVINCI
+        bool 'TI CPPI (Davinci)'
+        depends on USB_MUSB_DAVINCI
         help
           Enable DMA transfers when TI CPPI DMA is available.
 
 config USB_TUSB_OMAP_DMA
-        bool
-        depends on USB_MUSB_HDRC && !MUSB_PIO_ONLY
+        bool 'TUSB 6010'
         depends on USB_MUSB_TUSB6010
         depends on ARCH_OMAP
-        default y
         help
           Enable DMA transfers on TUSB 6010 when OMAP DMA is available.
 
+config MUSB_PIO_ONLY
+        bool 'Disable DMA (always use PIO)'
+        help
+          All data is copied between memory and FIFO by the CPU.
+          DMA controllers are ignored.
+
+          Do not choose this unless DMA support for your SOC or board
+          is unavailable (or unstable).  When DMA is enabled at compile time,
+          you can still disable it at run time using the "use_dma=n" module
+          parameter.
+
+endchoice
+
+endif # USB_MUSB_HDRC
diff --git a/drivers/usb/musb/Makefile b/drivers/usb/musb/Makefile
index d8fd9d092de..88bfb9dee4b 100644
--- a/drivers/usb/musb/Makefile
+++ b/drivers/usb/musb/Makefile
@@ -24,25 +24,7 @@ obj-$(CONFIG_USB_MUSB_UX500)			+= ux500.o
 # PIO only, or DMA (several potential schemes).
 # though PIO is always there to back up DMA, and for ep0
 
-ifneq ($(CONFIG_MUSB_PIO_ONLY),y)
-
-  ifeq ($(CONFIG_USB_INVENTRA_DMA),y)
-    musb_hdrc-y                 += musbhsdma.o
-
-  else
-    ifeq ($(CONFIG_USB_TI_CPPI_DMA),y)
-      musb_hdrc-y               += cppi_dma.o
-
-    else
-      ifeq ($(CONFIG_USB_TUSB_OMAP_DMA),y)
-        musb_hdrc-y             += tusb6010_omap.o
-
-      else
-        ifeq ($(CONFIG_USB_UX500_DMA),y)
-          musb_hdrc-y           += ux500_dma.o
-
-        endif
-      endif
-    endif
-  endif
-endif
+musb_hdrc-$(CONFIG_USB_INVENTRA_DMA)            += musbhsdma.o
+musb_hdrc-$(CONFIG_USB_TI_CPPI_DMA)             += cppi_dma.o
+musb_hdrc-$(CONFIG_USB_TUSB_OMAP_DMA)           += tusb6010_omap.o
+musb_hdrc-$(CONFIG_USB_UX500_DMA)               += ux500_dma.o
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index b63ab157010..f6ff7923048 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -661,7 +661,6 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
                 handled = IRQ_HANDLED;
                 musb->is_active = 1;
-                set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
 
                 musb->ep0_stage = MUSB_EP0_START;
 
@@ -1432,7 +1431,7 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
                 struct musb_hw_ep       *hw_ep = musb->endpoints + i;
 
                 hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
-#ifdef CONFIG_USB_MUSB_TUSB6010
+#if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
                 hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
                 hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
                 hw_ep->fifo_sync_va =
@@ -1631,6 +1630,7 @@ void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
                 }
         }
 }
+EXPORT_SYMBOL_GPL(musb_dma_completion);
 
 #else
 #define use_dma                 0
@@ -2012,8 +2012,6 @@ musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
         if (status < 0)
                 goto fail3;
 
-        pm_runtime_put(musb->controller);
-
         status = musb_init_debugfs(musb);
         if (status < 0)
                 goto fail4;
@@ -2158,6 +2156,7 @@ static void musb_save_context(struct musb *musb)
                 if (!epio)
                         continue;
 
+                musb_writeb(musb_base, MUSB_INDEX, i);
                 musb->context.index_regs[i].txmaxp =
                         musb_readw(epio, MUSB_TXMAXP);
                 musb->context.index_regs[i].txcsr =
@@ -2233,6 +2232,7 @@ static void musb_restore_context(struct musb *musb)
                 if (!epio)
                         continue;
 
+                musb_writeb(musb_base, MUSB_INDEX, i);
                 musb_writew(epio, MUSB_TXMAXP,
                         musb->context.index_regs[i].txmaxp);
                 musb_writew(epio, MUSB_TXCSR,
diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
index b3c065ab9db..3d28fb8a2dc 100644
--- a/drivers/usb/musb/musb_core.h
+++ b/drivers/usb/musb/musb_core.h
@@ -40,7 +40,6 @@
 #include <linux/interrupt.h>
 #include <linux/errno.h>
 #include <linux/timer.h>
-#include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
@@ -311,6 +310,7 @@ struct musb_context_registers {
         u8 index, testmode;
 
         u8 devctl, busctl, misc;
+        u32 otg_interfsel;
 
         struct musb_csr_regs index_regs[MUSB_C_NUM_EPS];
 };
@@ -327,6 +327,7 @@ struct musb {
 
         irqreturn_t             (*isr)(int, void *);
         struct work_struct      irq_work;
+        struct work_struct      otg_notifier_work;
         u16                     hwvers;
 
 /* this hub status bit is reserved by USB 2.0 and not seen by usbcore */
@@ -372,6 +373,7 @@ struct musb {
         u16                     int_tx;
 
         struct otg_transceiver  *xceiv;
+        u8                      xceiv_event;
 
         int nIrq;
         unsigned                irq_wake:1;
diff --git a/drivers/usb/musb/musb_debug.h b/drivers/usb/musb/musb_debug.h
index 742eada5002..27ba8f79946 100644
--- a/drivers/usb/musb/musb_debug.h
+++ b/drivers/usb/musb/musb_debug.h
@@ -43,8 +43,8 @@
 #define ERR(fmt, args...) yprintk(KERN_ERR, fmt, ## args)
 
 #ifdef CONFIG_DEBUG_FS
-extern int musb_init_debugfs(struct musb *musb);
-extern void musb_exit_debugfs(struct musb *musb);
+int musb_init_debugfs(struct musb *musb);
+void musb_exit_debugfs(struct musb *musb);
 #else
 static inline int musb_init_debugfs(struct musb *musb)
 {
diff --git a/drivers/usb/musb/musb_debugfs.c b/drivers/usb/musb/musb_debugfs.c
index 61f4ee466df..13d9af9bf92 100644
--- a/drivers/usb/musb/musb_debugfs.c
+++ b/drivers/usb/musb/musb_debugfs.c
@@ -33,11 +33,7 @@
 
 #include <linux/module.h>
 #include <linux/kernel.h>
-#include <linux/sched.h>
 #include <linux/init.h>
-#include <linux/list.h>
-#include <linux/platform_device.h>
-#include <linux/io.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
 
@@ -46,10 +42,6 @@
 #include "musb_core.h"
 #include "musb_debug.h"
 
-#ifdef CONFIG_ARCH_DAVINCI
-#include "davinci.h"
-#endif
-
 struct musb_register_map {
         char                    *name;
         unsigned                offset;
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 922148ff8d2..ac3d2eec20f 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -40,8 +40,6 @@
 #include <linux/smp.h>
 #include <linux/spinlock.h>
 #include <linux/delay.h>
-#include <linux/moduleparam.h>
-#include <linux/stat.h>
 #include <linux/dma-mapping.h>
 #include <linux/slab.h>
 
@@ -1844,7 +1842,7 @@ int __init musb_gadget_setup(struct musb *musb)
          */
 
         musb->g.ops = &musb_gadget_operations;
-        musb->g.is_dualspeed = 1;
+        musb->g.max_speed = USB_SPEED_HIGH;
         musb->g.speed = USB_SPEED_UNKNOWN;
 
         /* this "gadget" abstracts/virtualizes the controller */
@@ -1903,7 +1901,7 @@ static int musb_gadget_start(struct usb_gadget *g,
         unsigned long           flags;
         int                     retval = -EINVAL;
 
-        if (driver->speed < USB_SPEED_HIGH)
+        if (driver->max_speed < USB_SPEED_HIGH)
                 goto err0;
 
         pm_runtime_get_sync(musb->controller);
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
index 6a0d0467ec7..e40d7647caf 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -37,7 +37,6 @@
 #include <linux/list.h>
 #include <linux/timer.h>
 #include <linux/spinlock.h>
-#include <linux/init.h>
 #include <linux/device.h>
 #include <linux/interrupt.h>
 
diff --git a/drivers/usb/musb/musb_io.h b/drivers/usb/musb/musb_io.h
index 03c6ccdbb3b..e61aa95f2d2 100644
--- a/drivers/usb/musb/musb_io.h
+++ b/drivers/usb/musb/musb_io.h
@@ -74,7 +74,7 @@ static inline void musb_writel(void __iomem *addr, unsigned offset, u32 data)
         { __raw_writel(data, addr + offset); }
 
 
-#ifdef CONFIG_USB_MUSB_TUSB6010
+#if defined(CONFIG_USB_MUSB_TUSB6010) || defined (CONFIG_USB_MUSB_TUSB6010_MODULE)
 
 /*
  * TUSB6010 doesn't allow 8-bit access; 16-bit access is the minimum.
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index ba85f273e48..c27bbbf32b5 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -29,7 +29,6 @@
 #include <linux/sched.h>
 #include <linux/init.h>
 #include <linux/list.h>
-#include <linux/clk.h>
 #include <linux/io.h>
 #include <linux/platform_device.h>
 #include <linux/dma-mapping.h>
@@ -228,21 +227,25 @@ static int musb_otg_notifications(struct notifier_block *nb,
                 unsigned long event, void *unused)
 {
         struct musb     *musb = container_of(nb, struct musb, nb);
+
+        musb->xceiv_event = event;
+        schedule_work(&musb->otg_notifier_work);
+
+        return 0;
+}
+
+static void musb_otg_notifier_work(struct work_struct *data_notifier_work)
+{
+        struct musb *musb = container_of(data_notifier_work, struct musb, otg_notifier_work);
         struct device *dev = musb->controller;
         struct musb_hdrc_platform_data *pdata = dev->platform_data;
         struct omap_musb_board_data *data = pdata->board_data;
 
-        switch (event) {
+        switch (musb->xceiv_event) {
         case USB_EVENT_ID:
                 dev_dbg(musb->controller, "ID GND\n");
 
-                if (is_otg_enabled(musb)) {
-                        if (musb->gadget_driver) {
-                                pm_runtime_get_sync(musb->controller);
-                                otg_init(musb->xceiv);
-                                omap2430_musb_set_vbus(musb, 1);
-                        }
-                } else {
+                if (!is_otg_enabled(musb) || musb->gadget_driver) {
                         pm_runtime_get_sync(musb->controller);
                         otg_init(musb->xceiv);
                         omap2430_musb_set_vbus(musb, 1);
@@ -274,10 +277,7 @@ static int musb_otg_notifications(struct notifier_block *nb,
                 break;
         default:
                 dev_dbg(musb->controller, "ID float\n");
-                return NOTIFY_DONE;
         }
-
-        return NOTIFY_OK;
 }
 
 static int omap2430_musb_init(struct musb *musb)
@@ -297,6 +297,8 @@ static int omap2430_musb_init(struct musb *musb)
                 return -ENODEV;
         }
 
+        INIT_WORK(&musb->otg_notifier_work, musb_otg_notifier_work);
+
         status = pm_runtime_get_sync(dev);
         if (status < 0) {
                 dev_err(dev, "pm_runtime_get_sync FAILED");
@@ -334,7 +336,6 @@ static int omap2430_musb_init(struct musb *musb)
         return 0;
 
 err1:
-        pm_runtime_disable(dev);
         return status;
 }
 
@@ -350,20 +351,19 @@ static void omap2430_musb_enable(struct musb *musb)
 
         case USB_EVENT_ID:
                 otg_init(musb->xceiv);
-                if (data->interface_type == MUSB_INTERFACE_UTMI) {
-                        devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
-                        /* start the session */
-                        devctl |= MUSB_DEVCTL_SESSION;
-                        musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
-                        while (musb_readb(musb->mregs, MUSB_DEVCTL) &
-                                                MUSB_DEVCTL_BDEVICE) {
-                                cpu_relax();
-
-                                if (time_after(jiffies, timeout)) {
-                                        dev_err(musb->controller,
-                                        "configured as A device timeout");
-                                        break;
-                                }
+                if (data->interface_type != MUSB_INTERFACE_UTMI)
+                        break;
+                devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
+                /* start the session */
+                devctl |= MUSB_DEVCTL_SESSION;
+                musb_writeb(musb->mregs, MUSB_DEVCTL, devctl);
+                while (musb_readb(musb->mregs, MUSB_DEVCTL) &
+                                MUSB_DEVCTL_BDEVICE) {
+                        cpu_relax();
+
+                        if (time_after(jiffies, timeout)) {
+                                dev_err(dev, "configured as A device timeout");
+                                break;
                         }
                 }
                 break;
@@ -478,7 +478,6 @@ static int __exit omap2430_remove(struct platform_device *pdev)
         platform_device_del(glue->musb);
         platform_device_put(glue->musb);
         pm_runtime_put(&pdev->dev);
-        pm_runtime_disable(&pdev->dev);
         kfree(glue);
 
         return 0;
@@ -491,6 +490,9 @@ static int omap2430_runtime_suspend(struct device *dev)
         struct omap2430_glue            *glue = dev_get_drvdata(dev);
         struct musb                     *musb = glue_to_musb(glue);
 
+        musb->context.otg_interfsel = musb_readl(musb->mregs,
+                                                OTG_INTERFSEL);
+
         omap2430_low_level_exit(musb);
         otg_set_suspend(musb->xceiv, 1);
 
@@ -503,6 +505,9 @@ static int omap2430_runtime_resume(struct device *dev)
         struct musb                     *musb = glue_to_musb(glue);
 
         omap2430_low_level_init(musb);
+        musb_writel(musb->mregs, OTG_INTERFSEL,
+                                        musb->context.otg_interfsel);
+
         otg_set_suspend(musb->xceiv, 0);
 
         return 0;
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index ec1480191f7..1f405616e6c 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -56,6 +56,7 @@ u8 tusb_get_revision(struct musb *musb)
 
         return rev;
 }
+EXPORT_SYMBOL_GPL(tusb_get_revision);
 
 static int tusb_print_revision(struct musb *musb)
 {
diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index ef4333f4bbe..a163632877a 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -37,7 +37,6 @@ struct ux500_dma_channel {
         struct dma_channel channel;
         struct ux500_dma_controller *controller;
         struct musb_hw_ep *hw_ep;
-        struct work_struct channel_work;
         struct dma_chan *dma_chan;
         unsigned int cur_len;
         dma_cookie_t cookie;
@@ -56,31 +55,11 @@ struct ux500_dma_controller {
         dma_addr_t phy_base;
 };
 
-/* Work function invoked from DMA callback to handle tx transfers. */
-static void ux500_tx_work(struct work_struct *data)
-{
-        struct ux500_dma_channel *ux500_channel = container_of(data,
-                struct ux500_dma_channel, channel_work);
-        struct musb_hw_ep       *hw_ep = ux500_channel->hw_ep;
-        struct musb *musb = hw_ep->musb;
-        unsigned long flags;
-
-        dev_dbg(musb->controller, "DMA tx transfer done on hw_ep=%d\n",
-                hw_ep->epnum);
-
-        spin_lock_irqsave(&musb->lock, flags);
-        ux500_channel->channel.actual_len = ux500_channel->cur_len;
-        ux500_channel->channel.status = MUSB_DMA_STATUS_FREE;
-        musb_dma_completion(musb, hw_ep->epnum,
-                                ux500_channel->is_tx);
-        spin_unlock_irqrestore(&musb->lock, flags);
-}
-
 /* Work function invoked from DMA callback to handle rx transfers. */
-static void ux500_rx_work(struct work_struct *data)
+void ux500_dma_callback(void *private_data)
 {
-        struct ux500_dma_channel *ux500_channel = container_of(data,
-                struct ux500_dma_channel, channel_work);
+        struct dma_channel *channel = private_data;
+        struct ux500_dma_channel *ux500_channel = channel->private_data;
         struct musb_hw_ep       *hw_ep = ux500_channel->hw_ep;
         struct musb *musb = hw_ep->musb;
         unsigned long flags;
@@ -94,14 +73,7 @@ static void ux500_rx_work(struct work_struct *data)
         musb_dma_completion(musb, hw_ep->epnum,
                 ux500_channel->is_tx);
         spin_unlock_irqrestore(&musb->lock, flags);
-}
-
-void ux500_dma_callback(void *private_data)
-{
-        struct dma_channel *channel = (struct dma_channel *)private_data;
-        struct ux500_dma_channel *ux500_channel = channel->private_data;
 
-        schedule_work(&ux500_channel->channel_work);
 }
 
 static bool ux500_configure_channel(struct dma_channel *channel,
@@ -330,7 +302,6 @@ static int ux500_dma_controller_start(struct dma_controller *c)
         void **param_array;
         struct ux500_dma_channel *channel_array;
         u32 ch_count;
-        void (*musb_channel_work)(struct work_struct *);
         dma_cap_mask_t mask;
 
         if ((data->num_rx_channels > UX500_MUSB_DMA_NUM_RX_CHANNELS) ||
@@ -347,7 +318,6 @@ static int ux500_dma_controller_start(struct dma_controller *c)
         channel_array = controller->rx_channel;
         ch_count = data->num_rx_channels;
         param_array = data->dma_rx_param_array;
-        musb_channel_work = ux500_rx_work;
 
         for (dir = 0; dir < 2; dir++) {
                 for (ch_num = 0; ch_num < ch_count; ch_num++) {
@@ -374,15 +344,12 @@ static int ux500_dma_controller_start(struct dma_controller *c)
                                 return -EBUSY;
                         }
 
-                        INIT_WORK(&ux500_channel->channel_work,
-                                musb_channel_work);
                 }
 
                 /* Prepare the loop for TX channels */
                 channel_array = controller->tx_channel;
                 ch_count = data->num_tx_channels;
                 param_array = data->dma_tx_param_array;
-                musb_channel_work = ux500_tx_work;
                 is_tx = 1;
         }
 
diff --git a/drivers/usb/otg/Kconfig b/drivers/usb/otg/Kconfig
index c66481ad98d..2a25955881f 100644
--- a/drivers/usb/otg/Kconfig
+++ b/drivers/usb/otg/Kconfig
@@ -82,9 +82,9 @@ config NOP_USB_XCEIV
         tristate "NOP USB Transceiver Driver"
         select USB_OTG_UTILS
         help
-         this driver is to be used by all the usb transceiver which are either
-         built-in with usb ip or which are autonomous and doesn't require any
-         phy programming such as ISP1x04 etc.
+          This driver is to be used by all the usb transceiver which are either
+          built-in with usb ip or which are autonomous and doesn't require any
+          phy programming such as ISP1x04 etc.
 
 config USB_LANGWELL_OTG
         tristate "Intel Langwell USB OTG dual-role support"
@@ -114,13 +114,13 @@ config USB_MSM_OTG
           has an external PHY.
 
 config AB8500_USB
-        tristate "AB8500 USB Transceiver Driver"
-        depends on AB8500_CORE
-        select USB_OTG_UTILS
-        help
-          Enable this to support the USB OTG transceiver in AB8500 chip.
-          This transceiver supports high and full speed devices plus,
-          in host mode, low speed.
+        tristate "AB8500 USB Transceiver Driver"
+        depends on AB8500_CORE
+        select USB_OTG_UTILS
+        help
+          Enable this to support the USB OTG transceiver in AB8500 chip.
+          This transceiver supports high and full speed devices plus,
+          in host mode, low speed.
 
 config FSL_USB2_OTG
         bool "Freescale USB OTG Transceiver Driver"
@@ -130,4 +130,16 @@ config FSL_USB2_OTG
         help
           Enable this to support Freescale USB OTG transceiver.
 
+config USB_MV_OTG
+        tristate "Marvell USB OTG support"
+        depends on USB_MV_UDC
+        select USB_OTG
+        select USB_OTG_UTILS
+        help
+          Say Y here if you want to build Marvell USB OTG transciever
+          driver in kernel (including PXA and MMP series). This driver
+          implements role switch between EHCI host driver and gadget driver.
+
+          To compile this driver as a module, choose M here.
+
 endif # USB || OTG
diff --git a/drivers/usb/otg/Makefile b/drivers/usb/otg/Makefile
index 566655c5333..b2c5a959863 100644
--- a/drivers/usb/otg/Makefile
+++ b/drivers/usb/otg/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_USB_MSM_OTG)	+= msm_otg.o
 obj-$(CONFIG_AB8500_USB)        += ab8500-usb.o
 fsl_usb2_otg-objs               := fsl_otg.o otg_fsm.o
 obj-$(CONFIG_FSL_USB2_OTG)      += fsl_usb2_otg.o
+obj-$(CONFIG_USB_MV_OTG)        += mv_otg.o
diff --git a/drivers/usb/otg/fsl_otg.c b/drivers/usb/otg/fsl_otg.c
index 2d9cc445fc7..a190850d2d3 100644
--- a/drivers/usb/otg/fsl_otg.c
+++ b/drivers/usb/otg/fsl_otg.c
@@ -1151,18 +1151,7 @@ struct platform_driver fsl_otg_driver = {
         },
 };
 
-static int __init fsl_usb_otg_init(void)
-{
-        pr_info(DRIVER_INFO "\n");
-        return platform_driver_register(&fsl_otg_driver);
-}
-module_init(fsl_usb_otg_init);
-
-static void __exit fsl_usb_otg_exit(void)
-{
-        platform_driver_unregister(&fsl_otg_driver);
-}
-module_exit(fsl_usb_otg_exit);
+module_platform_driver(fsl_otg_driver);
 
 MODULE_DESCRIPTION(DRIVER_INFO);
 MODULE_AUTHOR(DRIVER_AUTHOR);
diff --git a/drivers/usb/otg/mv_otg.c b/drivers/usb/otg/mv_otg.c
new file mode 100644
index 00000000000..db0d4fcdc8e
--- /dev/null
+++ b/drivers/usb/otg/mv_otg.c
@@ -0,0 +1,957 @@
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ * Author: Chao Xie <chao.xie@marvell.com>
+ *         Neil Zhang <zhangwm@marvell.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
+#include <linux/device.h>
+#include <linux/proc_fs.h>
+#include <linux/clk.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/hcd.h>
+#include <linux/platform_data/mv_usb.h>
+
+#include "mv_otg.h"
+
+#define DRIVER_DESC     "Marvell USB OTG transceiver driver"
+#define DRIVER_VERSION  "Jan 20, 2010"
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_VERSION(DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+static const char driver_name[] = "mv-otg";
+
+static char *state_string[] = {
+        "undefined",
+        "b_idle",
+        "b_srp_init",
+        "b_peripheral",
+        "b_wait_acon",
+        "b_host",
+        "a_idle",
+        "a_wait_vrise",
+        "a_wait_bcon",
+        "a_host",
+        "a_suspend",
+        "a_peripheral",
+        "a_wait_vfall",
+        "a_vbus_err"
+};
+
+static int mv_otg_set_vbus(struct otg_transceiver *otg, bool on)
+{
+        struct mv_otg *mvotg = container_of(otg, struct mv_otg, otg);
+        if (mvotg->pdata->set_vbus == NULL)
+                return -ENODEV;
+
+        return mvotg->pdata->set_vbus(on);
+}
+
+static int mv_otg_set_host(struct otg_transceiver *otg,
+                           struct usb_bus *host)
+{
+        otg->host = host;
+
+        return 0;
+}
+
+static int mv_otg_set_peripheral(struct otg_transceiver *otg,
+                                 struct usb_gadget *gadget)
+{
+        otg->gadget = gadget;
+
+        return 0;
+}
+
+static void mv_otg_run_state_machine(struct mv_otg *mvotg,
+                                     unsigned long delay)
+{
+        dev_dbg(&mvotg->pdev->dev, "transceiver is updated\n");
+        if (!mvotg->qwork)
+                return;
+
+        queue_delayed_work(mvotg->qwork, &mvotg->work, delay);
+}
+
+static void mv_otg_timer_await_bcon(unsigned long data)
+{
+        struct mv_otg *mvotg = (struct mv_otg *) data;
+
+        mvotg->otg_ctrl.a_wait_bcon_timeout = 1;
+
+        dev_info(&mvotg->pdev->dev, "B Device No Response!\n");
+
+        if (spin_trylock(&mvotg->wq_lock)) {
+                mv_otg_run_state_machine(mvotg, 0);
+                spin_unlock(&mvotg->wq_lock);
+        }
+}
+
+static int mv_otg_cancel_timer(struct mv_otg *mvotg, unsigned int id)
+{
+        struct timer_list *timer;
+
+        if (id >= OTG_TIMER_NUM)
+                return -EINVAL;
+
+        timer = &mvotg->otg_ctrl.timer[id];
+
+        if (timer_pending(timer))
+                del_timer(timer);
+
+        return 0;
+}
+
+static int mv_otg_set_timer(struct mv_otg *mvotg, unsigned int id,
+                            unsigned long interval,
+                            void (*callback) (unsigned long))
+{
+        struct timer_list *timer;
+
+        if (id >= OTG_TIMER_NUM)
+                return -EINVAL;
+
+        timer = &mvotg->otg_ctrl.timer[id];
+        if (timer_pending(timer)) {
+                dev_err(&mvotg->pdev->dev, "Timer%d is already running\n", id);
+                return -EBUSY;
+        }
+
+        init_timer(timer);
+        timer->data = (unsigned long) mvotg;
+        timer->function = callback;
+        timer->expires = jiffies + interval;
+        add_timer(timer);
+
+        return 0;
+}
+
+static int mv_otg_reset(struct mv_otg *mvotg)
+{
+        unsigned int loops;
+        u32 tmp;
+
+        /* Stop the controller */
+        tmp = readl(&mvotg->op_regs->usbcmd);
+        tmp &= ~USBCMD_RUN_STOP;
+        writel(tmp, &mvotg->op_regs->usbcmd);
+
+        /* Reset the controller to get default values */
+        writel(USBCMD_CTRL_RESET, &mvotg->op_regs->usbcmd);
+
+        loops = 500;
+        while (readl(&mvotg->op_regs->usbcmd) & USBCMD_CTRL_RESET) {
+                if (loops == 0) {
+                        dev_err(&mvotg->pdev->dev,
+                                "Wait for RESET completed TIMEOUT\n");
+                        return -ETIMEDOUT;
+                }
+                loops--;
+                udelay(20);
+        }
+
+        writel(0x0, &mvotg->op_regs->usbintr);
+        tmp = readl(&mvotg->op_regs->usbsts);
+        writel(tmp, &mvotg->op_regs->usbsts);
+
+        return 0;
+}
+
+static void mv_otg_init_irq(struct mv_otg *mvotg)
+{
+        u32 otgsc;
+
+        mvotg->irq_en = OTGSC_INTR_A_SESSION_VALID
+            | OTGSC_INTR_A_VBUS_VALID;
+        mvotg->irq_status = OTGSC_INTSTS_A_SESSION_VALID
+            | OTGSC_INTSTS_A_VBUS_VALID;
+
+        if (mvotg->pdata->vbus == NULL) {
+                mvotg->irq_en |= OTGSC_INTR_B_SESSION_VALID
+                    | OTGSC_INTR_B_SESSION_END;
+                mvotg->irq_status |= OTGSC_INTSTS_B_SESSION_VALID
+                    | OTGSC_INTSTS_B_SESSION_END;
+        }
+
+        if (mvotg->pdata->id == NULL) {
+                mvotg->irq_en |= OTGSC_INTR_USB_ID;
+                mvotg->irq_status |= OTGSC_INTSTS_USB_ID;
+        }
+
+        otgsc = readl(&mvotg->op_regs->otgsc);
+        otgsc |= mvotg->irq_en;
+        writel(otgsc, &mvotg->op_regs->otgsc);
+}
+
+static void mv_otg_start_host(struct mv_otg *mvotg, int on)
+{
+        struct otg_transceiver *otg = &mvotg->otg;
+        struct usb_hcd *hcd;
+
+        if (!otg->host)
+                return;
+
+        dev_info(&mvotg->pdev->dev, "%s host\n", on ? "start" : "stop");
+
+        hcd = bus_to_hcd(otg->host);
+
+        if (on)
+                usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+        else
+                usb_remove_hcd(hcd);
+}
+
+static void mv_otg_start_periphrals(struct mv_otg *mvotg, int on)
+{
+        struct otg_transceiver *otg = &mvotg->otg;
+
+        if (!otg->gadget)
+                return;
+
+        dev_info(otg->dev, "gadget %s\n", on ? "on" : "off");
+
+        if (on)
+                usb_gadget_vbus_connect(otg->gadget);
+        else
+                usb_gadget_vbus_disconnect(otg->gadget);
+}
+
+static void otg_clock_enable(struct mv_otg *mvotg)
+{
+        unsigned int i;
+
+        for (i = 0; i < mvotg->clknum; i++)
+                clk_enable(mvotg->clk[i]);
+}
+
+static void otg_clock_disable(struct mv_otg *mvotg)
+{
+        unsigned int i;
+
+        for (i = 0; i < mvotg->clknum; i++)
+                clk_disable(mvotg->clk[i]);
+}
+
+static int mv_otg_enable_internal(struct mv_otg *mvotg)
+{
+        int retval = 0;
+
+        if (mvotg->active)
+                return 0;
+
+        dev_dbg(&mvotg->pdev->dev, "otg enabled\n");
+
+        otg_clock_enable(mvotg);
+        if (mvotg->pdata->phy_init) {
+                retval = mvotg->pdata->phy_init(mvotg->phy_regs);
+                if (retval) {
+                        dev_err(&mvotg->pdev->dev,
+                                "init phy error %d\n", retval);
+                        otg_clock_disable(mvotg);
+                        return retval;
+                }
+        }
+        mvotg->active = 1;
+
+        return 0;
+
+}
+
+static int mv_otg_enable(struct mv_otg *mvotg)
+{
+        if (mvotg->clock_gating)
+                return mv_otg_enable_internal(mvotg);
+
+        return 0;
+}
+
+static void mv_otg_disable_internal(struct mv_otg *mvotg)
+{
+        if (mvotg->active) {
+                dev_dbg(&mvotg->pdev->dev, "otg disabled\n");
+                if (mvotg->pdata->phy_deinit)
+                        mvotg->pdata->phy_deinit(mvotg->phy_regs);
+                otg_clock_disable(mvotg);
+                mvotg->active = 0;
+        }
+}
+
+static void mv_otg_disable(struct mv_otg *mvotg)
+{
+        if (mvotg->clock_gating)
+                mv_otg_disable_internal(mvotg);
+}
+
+static void mv_otg_update_inputs(struct mv_otg *mvotg)
+{
+        struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
+        u32 otgsc;
+
+        otgsc = readl(&mvotg->op_regs->otgsc);
+
+        if (mvotg->pdata->vbus) {
+                if (mvotg->pdata->vbus->poll() == VBUS_HIGH) {
+                        otg_ctrl->b_sess_vld = 1;
+                        otg_ctrl->b_sess_end = 0;
+                } else {
+                        otg_ctrl->b_sess_vld = 0;
+                        otg_ctrl->b_sess_end = 1;
+                }
+        } else {
+                otg_ctrl->b_sess_vld = !!(otgsc & OTGSC_STS_B_SESSION_VALID);
+                otg_ctrl->b_sess_end = !!(otgsc & OTGSC_STS_B_SESSION_END);
+        }
+
+        if (mvotg->pdata->id)
+                otg_ctrl->id = !!mvotg->pdata->id->poll();
+        else
+                otg_ctrl->id = !!(otgsc & OTGSC_STS_USB_ID);
+
+        if (mvotg->pdata->otg_force_a_bus_req && !otg_ctrl->id)
+                otg_ctrl->a_bus_req = 1;
+
+        otg_ctrl->a_sess_vld = !!(otgsc & OTGSC_STS_A_SESSION_VALID);
+        otg_ctrl->a_vbus_vld = !!(otgsc & OTGSC_STS_A_VBUS_VALID);
+
+        dev_dbg(&mvotg->pdev->dev, "%s: ", __func__);
+        dev_dbg(&mvotg->pdev->dev, "id %d\n", otg_ctrl->id);
+        dev_dbg(&mvotg->pdev->dev, "b_sess_vld %d\n", otg_ctrl->b_sess_vld);
+        dev_dbg(&mvotg->pdev->dev, "b_sess_end %d\n", otg_ctrl->b_sess_end);
+        dev_dbg(&mvotg->pdev->dev, "a_vbus_vld %d\n", otg_ctrl->a_vbus_vld);
+        dev_dbg(&mvotg->pdev->dev, "a_sess_vld %d\n", otg_ctrl->a_sess_vld);
+}
+
+static void mv_otg_update_state(struct mv_otg *mvotg)
+{
+        struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
+        struct otg_transceiver *otg = &mvotg->otg;
+        int old_state = otg->state;
+
+        switch (old_state) {
+        case OTG_STATE_UNDEFINED:
+                otg->state = OTG_STATE_B_IDLE;
+                /* FALL THROUGH */
+        case OTG_STATE_B_IDLE:
+                if (otg_ctrl->id == 0)
+                        otg->state = OTG_STATE_A_IDLE;
+                else if (otg_ctrl->b_sess_vld)
+                        otg->state = OTG_STATE_B_PERIPHERAL;
+                break;
+        case OTG_STATE_B_PERIPHERAL:
+                if (!otg_ctrl->b_sess_vld || otg_ctrl->id == 0)
+                        otg->state = OTG_STATE_B_IDLE;
+                break;
+        case OTG_STATE_A_IDLE:
+                if (otg_ctrl->id)
+                        otg->state = OTG_STATE_B_IDLE;
+                else if (!(otg_ctrl->a_bus_drop) &&
+                         (otg_ctrl->a_bus_req || otg_ctrl->a_srp_det))
+                        otg->state = OTG_STATE_A_WAIT_VRISE;
+                break;
+        case OTG_STATE_A_WAIT_VRISE:
+                if (otg_ctrl->a_vbus_vld)
+                        otg->state = OTG_STATE_A_WAIT_BCON;
+                break;
+        case OTG_STATE_A_WAIT_BCON:
+                if (otg_ctrl->id || otg_ctrl->a_bus_drop
+                    || otg_ctrl->a_wait_bcon_timeout) {
+                        mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+                        mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+                        otg->state = OTG_STATE_A_WAIT_VFALL;
+                        otg_ctrl->a_bus_req = 0;
+                } else if (!otg_ctrl->a_vbus_vld) {
+                        mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+                        mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+                        otg->state = OTG_STATE_A_VBUS_ERR;
+                } else if (otg_ctrl->b_conn) {
+                        mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
+                        mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
+                        otg->state = OTG_STATE_A_HOST;
+                }
+                break;
+        case OTG_STATE_A_HOST:
+                if (otg_ctrl->id || !otg_ctrl->b_conn
+                    || otg_ctrl->a_bus_drop)
+                        otg->state = OTG_STATE_A_WAIT_BCON;
+                else if (!otg_ctrl->a_vbus_vld)
+                        otg->state = OTG_STATE_A_VBUS_ERR;
+                break;
+        case OTG_STATE_A_WAIT_VFALL:
+                if (otg_ctrl->id
+                    || (!otg_ctrl->b_conn && otg_ctrl->a_sess_vld)
+                    || otg_ctrl->a_bus_req)
+                        otg->state = OTG_STATE_A_IDLE;
+                break;
+        case OTG_STATE_A_VBUS_ERR:
+                if (otg_ctrl->id || otg_ctrl->a_clr_err
+                    || otg_ctrl->a_bus_drop) {
+                        otg_ctrl->a_clr_err = 0;
+                        otg->state = OTG_STATE_A_WAIT_VFALL;
+                }
+                break;
+        default:
+                break;
+        }
+}
+
+static void mv_otg_work(struct work_struct *work)
+{
+        struct mv_otg *mvotg;
+        struct otg_transceiver *otg;
+        int old_state;
+
+        mvotg = container_of((struct delayed_work *)work, struct mv_otg, work);
+
+run:
+        /* work queue is single thread, or we need spin_lock to protect */
+        otg = &mvotg->otg;
+        old_state = otg->state;
+
+        if (!mvotg->active)
+                return;
+
+        mv_otg_update_inputs(mvotg);
+        mv_otg_update_state(mvotg);
+
+        if (old_state != otg->state) {
+                dev_info(&mvotg->pdev->dev, "change from state %s to %s\n",
+                         state_string[old_state],
+                         state_string[otg->state]);
+
+                switch (otg->state) {
+                case OTG_STATE_B_IDLE:
+                        mvotg->otg.default_a = 0;
+                        if (old_state == OTG_STATE_B_PERIPHERAL)
+                                mv_otg_start_periphrals(mvotg, 0);
+                        mv_otg_reset(mvotg);
+                        mv_otg_disable(mvotg);
+                        break;
+                case OTG_STATE_B_PERIPHERAL:
+                        mv_otg_enable(mvotg);
+                        mv_otg_start_periphrals(mvotg, 1);
+                        break;
+                case OTG_STATE_A_IDLE:
+                        mvotg->otg.default_a = 1;
+                        mv_otg_enable(mvotg);
+                        if (old_state == OTG_STATE_A_WAIT_VFALL)
+                                mv_otg_start_host(mvotg, 0);
+                        mv_otg_reset(mvotg);
+                        break;
+                case OTG_STATE_A_WAIT_VRISE:
+                        mv_otg_set_vbus(&mvotg->otg, 1);
+                        break;
+                case OTG_STATE_A_WAIT_BCON:
+                        if (old_state != OTG_STATE_A_HOST)
+                                mv_otg_start_host(mvotg, 1);
+                        mv_otg_set_timer(mvotg, A_WAIT_BCON_TIMER,
+                                         T_A_WAIT_BCON,
+                                         mv_otg_timer_await_bcon);
+                        /*
+                         * Now, we directly enter A_HOST. So set b_conn = 1
+                         * here. In fact, it need host driver to notify us.
+                         */
+                        mvotg->otg_ctrl.b_conn = 1;
+                        break;
+                case OTG_STATE_A_HOST:
+                        break;
+                case OTG_STATE_A_WAIT_VFALL:
+                        /*
+                         * Now, we has exited A_HOST. So set b_conn = 0
+                         * here. In fact, it need host driver to notify us.
+                         */
+                        mvotg->otg_ctrl.b_conn = 0;
+                        mv_otg_set_vbus(&mvotg->otg, 0);
+                        break;
+                case OTG_STATE_A_VBUS_ERR:
+                        break;
+                default:
+                        break;
+                }
+                goto run;
+        }
+}
+
+static irqreturn_t mv_otg_irq(int irq, void *dev)
+{
+        struct mv_otg *mvotg = dev;
+        u32 otgsc;
+
+        otgsc = readl(&mvotg->op_regs->otgsc);
+        writel(otgsc, &mvotg->op_regs->otgsc);
+
+        /*
+         * if we have vbus, then the vbus detection for B-device
+         * will be done by mv_otg_inputs_irq().
+         */
+        if (mvotg->pdata->vbus)
+                if ((otgsc & OTGSC_STS_USB_ID) &&
+                    !(otgsc & OTGSC_INTSTS_USB_ID))
+                        return IRQ_NONE;
+
+        if ((otgsc & mvotg->irq_status) == 0)
+                return IRQ_NONE;
+
+        mv_otg_run_state_machine(mvotg, 0);
+
+        return IRQ_HANDLED;
+}
+
+static irqreturn_t mv_otg_inputs_irq(int irq, void *dev)
+{
+        struct mv_otg *mvotg = dev;
+
+        /* The clock may disabled at this time */
+        if (!mvotg->active) {
+                mv_otg_enable(mvotg);
+                mv_otg_init_irq(mvotg);
+        }
+
+        mv_otg_run_state_machine(mvotg, 0);
+
+        return IRQ_HANDLED;
+}
+
+static ssize_t
+get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct mv_otg *mvotg = dev_get_drvdata(dev);
+        return scnprintf(buf, PAGE_SIZE, "%d\n",
+                         mvotg->otg_ctrl.a_bus_req);
+}
+
+static ssize_t
+set_a_bus_req(struct device *dev, struct device_attribute *attr,
+              const char *buf, size_t count)
+{
+        struct mv_otg *mvotg = dev_get_drvdata(dev);
+
+        if (count > 2)
+                return -1;
+
+        /* We will use this interface to change to A device */
+        if (mvotg->otg.state != OTG_STATE_B_IDLE
+            && mvotg->otg.state != OTG_STATE_A_IDLE)
+                return -1;
+
+        /* The clock may disabled and we need to set irq for ID detected */
+        mv_otg_enable(mvotg);
+        mv_otg_init_irq(mvotg);
+
+        if (buf[0] == '1') {
+                mvotg->otg_ctrl.a_bus_req = 1;
+                mvotg->otg_ctrl.a_bus_drop = 0;
+                dev_dbg(&mvotg->pdev->dev,
+                        "User request: a_bus_req = 1\n");
+
+                if (spin_trylock(&mvotg->wq_lock)) {
+                        mv_otg_run_state_machine(mvotg, 0);
+                        spin_unlock(&mvotg->wq_lock);
+                }
+        }
+
+        return count;
+}
+
+static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUSR, get_a_bus_req,
+                   set_a_bus_req);
+
+static ssize_t
+set_a_clr_err(struct device *dev, struct device_attribute *attr,
+              const char *buf, size_t count)
+{
+        struct mv_otg *mvotg = dev_get_drvdata(dev);
+        if (!mvotg->otg.default_a)
+                return -1;
+
+        if (count > 2)
+                return -1;
+
+        if (buf[0] == '1') {
+                mvotg->otg_ctrl.a_clr_err = 1;
+                dev_dbg(&mvotg->pdev->dev,
+                        "User request: a_clr_err = 1\n");
+        }
+
+        if (spin_trylock(&mvotg->wq_lock)) {
+                mv_otg_run_state_machine(mvotg, 0);
+                spin_unlock(&mvotg->wq_lock);
+        }
+
+        return count;
+}
+
+static DEVICE_ATTR(a_clr_err, S_IWUSR, NULL, set_a_clr_err);
+
+static ssize_t
+get_a_bus_drop(struct device *dev, struct device_attribute *attr,
+               char *buf)
+{
+        struct mv_otg *mvotg = dev_get_drvdata(dev);
+        return scnprintf(buf, PAGE_SIZE, "%d\n",
+                         mvotg->otg_ctrl.a_bus_drop);
+}
+
+static ssize_t
+set_a_bus_drop(struct device *dev, struct device_attribute *attr,
+               const char *buf, size_t count)
+{
+        struct mv_otg *mvotg = dev_get_drvdata(dev);
+        if (!mvotg->otg.default_a)
+                return -1;
+
+        if (count > 2)
+                return -1;
+
+        if (buf[0] == '0') {
+                mvotg->otg_ctrl.a_bus_drop = 0;
+                dev_dbg(&mvotg->pdev->dev,
+                        "User request: a_bus_drop = 0\n");
+        } else if (buf[0] == '1') {
+                mvotg->otg_ctrl.a_bus_drop = 1;
+                mvotg->otg_ctrl.a_bus_req = 0;
+                dev_dbg(&mvotg->pdev->dev,
+                        "User request: a_bus_drop = 1\n");
+                dev_dbg(&mvotg->pdev->dev,
+                        "User request: and a_bus_req = 0\n");
+        }
+
+        if (spin_trylock(&mvotg->wq_lock)) {
+                mv_otg_run_state_machine(mvotg, 0);
+                spin_unlock(&mvotg->wq_lock);
+        }
+
+        return count;
+}
+
+static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUSR,
+                   get_a_bus_drop, set_a_bus_drop);
+
+static struct attribute *inputs_attrs[] = {
+        &dev_attr_a_bus_req.attr,
+        &dev_attr_a_clr_err.attr,
+        &dev_attr_a_bus_drop.attr,
+        NULL,
+};
+
+static struct attribute_group inputs_attr_group = {
+        .name = "inputs",
+        .attrs = inputs_attrs,
+};
+
+int mv_otg_remove(struct platform_device *pdev)
+{
+        struct mv_otg *mvotg = platform_get_drvdata(pdev);
+        int clk_i;
+
+        sysfs_remove_group(&mvotg->pdev->dev.kobj, &inputs_attr_group);
+
+        if (mvotg->irq)
+                free_irq(mvotg->irq, mvotg);
+
+        if (mvotg->pdata->vbus)
+                free_irq(mvotg->pdata->vbus->irq, mvotg);
+        if (mvotg->pdata->id)
+                free_irq(mvotg->pdata->id->irq, mvotg);
+
+        if (mvotg->qwork) {
+                flush_workqueue(mvotg->qwork);
+                destroy_workqueue(mvotg->qwork);
+        }
+
+        mv_otg_disable(mvotg);
+
+        if (mvotg->cap_regs)
+                iounmap(mvotg->cap_regs);
+
+        if (mvotg->phy_regs)
+                iounmap(mvotg->phy_regs);
+
+        for (clk_i = 0; clk_i <= mvotg->clknum; clk_i++)
+                clk_put(mvotg->clk[clk_i]);
+
+        otg_set_transceiver(NULL);
+        platform_set_drvdata(pdev, NULL);
+
+        kfree(mvotg);
+
+        return 0;
+}
+
+static int mv_otg_probe(struct platform_device *pdev)
+{
+        struct mv_usb_platform_data *pdata = pdev->dev.platform_data;
+        struct mv_otg *mvotg;
+        struct resource *r;
+        int retval = 0, clk_i, i;
+        size_t size;
+
+        if (pdata == NULL) {
+                dev_err(&pdev->dev, "failed to get platform data\n");
+                return -ENODEV;
+        }
+
+        size = sizeof(*mvotg) + sizeof(struct clk *) * pdata->clknum;
+        mvotg = kzalloc(size, GFP_KERNEL);
+        if (!mvotg) {
+                dev_err(&pdev->dev, "failed to allocate memory!\n");
+                return -ENOMEM;
+        }
+
+        platform_set_drvdata(pdev, mvotg);
+
+        mvotg->pdev = pdev;
+        mvotg->pdata = pdata;
+
+        mvotg->clknum = pdata->clknum;
+        for (clk_i = 0; clk_i < mvotg->clknum; clk_i++) {
+                mvotg->clk[clk_i] = clk_get(&pdev->dev, pdata->clkname[clk_i]);
+                if (IS_ERR(mvotg->clk[clk_i])) {
+                        retval = PTR_ERR(mvotg->clk[clk_i]);
+                        goto err_put_clk;
+                }
+        }
+
+        mvotg->qwork = create_singlethread_workqueue("mv_otg_queue");
+        if (!mvotg->qwork) {
+                dev_dbg(&pdev->dev, "cannot create workqueue for OTG\n");
+                retval = -ENOMEM;
+                goto err_put_clk;
+        }
+
+        INIT_DELAYED_WORK(&mvotg->work, mv_otg_work);
+
+        /* OTG common part */
+        mvotg->pdev = pdev;
+        mvotg->otg.dev = &pdev->dev;
+        mvotg->otg.label = driver_name;
+        mvotg->otg.set_host = mv_otg_set_host;
+        mvotg->otg.set_peripheral = mv_otg_set_peripheral;
+        mvotg->otg.set_vbus = mv_otg_set_vbus;
+        mvotg->otg.state = OTG_STATE_UNDEFINED;
+
+        for (i = 0; i < OTG_TIMER_NUM; i++)
+                init_timer(&mvotg->otg_ctrl.timer[i]);
+
+        r = platform_get_resource_byname(mvotg->pdev,
+                                         IORESOURCE_MEM, "phyregs");
+        if (r == NULL) {
+                dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
+                retval = -ENODEV;
+                goto err_destroy_workqueue;
+        }
+
+        mvotg->phy_regs = ioremap(r->start, resource_size(r));
+        if (mvotg->phy_regs == NULL) {
+                dev_err(&pdev->dev, "failed to map phy I/O memory\n");
+                retval = -EFAULT;
+                goto err_destroy_workqueue;
+        }
+
+        r = platform_get_resource_byname(mvotg->pdev,
+                                         IORESOURCE_MEM, "capregs");
+        if (r == NULL) {
+                dev_err(&pdev->dev, "no I/O memory resource defined\n");
+                retval = -ENODEV;
+                goto err_unmap_phyreg;
+        }
+
+        mvotg->cap_regs = ioremap(r->start, resource_size(r));
+        if (mvotg->cap_regs == NULL) {
+                dev_err(&pdev->dev, "failed to map I/O memory\n");
+                retval = -EFAULT;
+                goto err_unmap_phyreg;
+        }
+
+        /* we will acces controller register, so enable the udc controller */
+        retval = mv_otg_enable_internal(mvotg);
+        if (retval) {
+                dev_err(&pdev->dev, "mv otg enable error %d\n", retval);
+                goto err_unmap_capreg;
+        }
+
+        mvotg->op_regs =
+                (struct mv_otg_regs __iomem *) ((unsigned long) mvotg->cap_regs
+                        + (readl(mvotg->cap_regs) & CAPLENGTH_MASK));
+
+        if (pdata->id) {
+                retval = request_threaded_irq(pdata->id->irq, NULL,
+                                              mv_otg_inputs_irq,
+                                              IRQF_ONESHOT, "id", mvotg);
+                if (retval) {
+                        dev_info(&pdev->dev,
+                                 "Failed to request irq for ID\n");
+                        pdata->id = NULL;
+                }
+        }
+
+        if (pdata->vbus) {
+                mvotg->clock_gating = 1;
+                retval = request_threaded_irq(pdata->vbus->irq, NULL,
+                                              mv_otg_inputs_irq,
+                                              IRQF_ONESHOT, "vbus", mvotg);
+                if (retval) {
+                        dev_info(&pdev->dev,
+                                 "Failed to request irq for VBUS, "
+                                 "disable clock gating\n");
+                        mvotg->clock_gating = 0;
+                        pdata->vbus = NULL;
+                }
+        }
+
+        if (pdata->disable_otg_clock_gating)
+                mvotg->clock_gating = 0;
+
+        mv_otg_reset(mvotg);
+        mv_otg_init_irq(mvotg);
+
+        r = platform_get_resource(mvotg->pdev, IORESOURCE_IRQ, 0);
+        if (r == NULL) {
+                dev_err(&pdev->dev, "no IRQ resource defined\n");
+                retval = -ENODEV;
+                goto err_disable_clk;
+        }
+
+        mvotg->irq = r->start;
+        if (request_irq(mvotg->irq, mv_otg_irq, IRQF_SHARED,
+                        driver_name, mvotg)) {
+                dev_err(&pdev->dev, "Request irq %d for OTG failed\n",
+                        mvotg->irq);
+                mvotg->irq = 0;
+                retval = -ENODEV;
+                goto err_disable_clk;
+        }
+
+        retval = otg_set_transceiver(&mvotg->otg);
+        if (retval < 0) {
+                dev_err(&pdev->dev, "can't register transceiver, %d\n",
+                        retval);
+                goto err_free_irq;
+        }
+
+        retval = sysfs_create_group(&pdev->dev.kobj, &inputs_attr_group);
+        if (retval < 0) {
+                dev_dbg(&pdev->dev,
+                        "Can't register sysfs attr group: %d\n", retval);
+                goto err_set_transceiver;
+        }
+
+        spin_lock_init(&mvotg->wq_lock);
+        if (spin_trylock(&mvotg->wq_lock)) {
+                mv_otg_run_state_machine(mvotg, 2 * HZ);
+                spin_unlock(&mvotg->wq_lock);
+        }
+
+        dev_info(&pdev->dev,
+                 "successful probe OTG device %s clock gating.\n",
+                 mvotg->clock_gating ? "with" : "without");
+
+        return 0;
+
+err_set_transceiver:
+        otg_set_transceiver(NULL);
+err_free_irq:
+        free_irq(mvotg->irq, mvotg);
+err_disable_clk:
+        if (pdata->vbus)
+                free_irq(pdata->vbus->irq, mvotg);
+        if (pdata->id)
+                free_irq(pdata->id->irq, mvotg);
+        mv_otg_disable_internal(mvotg);
+err_unmap_capreg:
+        iounmap(mvotg->cap_regs);
+err_unmap_phyreg:
+        iounmap(mvotg->phy_regs);
+err_destroy_workqueue:
+        flush_workqueue(mvotg->qwork);
+        destroy_workqueue(mvotg->qwork);
+err_put_clk:
+        for (clk_i--; clk_i >= 0; clk_i--)
+                clk_put(mvotg->clk[clk_i]);
+
+        platform_set_drvdata(pdev, NULL);
+        kfree(mvotg);
+
+        return retval;
+}
+
+#ifdef CONFIG_PM
+static int mv_otg_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        struct mv_otg *mvotg = platform_get_drvdata(pdev);
+
+        if (mvotg->otg.state != OTG_STATE_B_IDLE) {
+                dev_info(&pdev->dev,
+                         "OTG state is not B_IDLE, it is %d!\n",
+                         mvotg->otg.state);
+                return -EAGAIN;
+        }
+
+        if (!mvotg->clock_gating)
+                mv_otg_disable_internal(mvotg);
+
+        return 0;
+}
+
+static int mv_otg_resume(struct platform_device *pdev)
+{
+        struct mv_otg *mvotg = platform_get_drvdata(pdev);
+        u32 otgsc;
+
+        if (!mvotg->clock_gating) {
+                mv_otg_enable_internal(mvotg);
+
+                otgsc = readl(&mvotg->op_regs->otgsc);
+                otgsc |= mvotg->irq_en;
+                writel(otgsc, &mvotg->op_regs->otgsc);
+
+                if (spin_trylock(&mvotg->wq_lock)) {
+                        mv_otg_run_state_machine(mvotg, 0);
+                        spin_unlock(&mvotg->wq_lock);
+                }
+        }
+        return 0;
+}
+#endif
+
+static struct platform_driver mv_otg_driver = {
+        .probe = mv_otg_probe,
+        .remove = __exit_p(mv_otg_remove),
+        .driver = {
+                   .owner = THIS_MODULE,
+                   .name = driver_name,
+                   },
+#ifdef CONFIG_PM
+        .suspend = mv_otg_suspend,
+        .resume = mv_otg_resume,
+#endif
+};
+
+static int __init mv_otg_init(void)
+{
+        return platform_driver_register(&mv_otg_driver);
+}
+
+static void __exit mv_otg_exit(void)
+{
+        platform_driver_unregister(&mv_otg_driver);
+}
+
+module_init(mv_otg_init);
+module_exit(mv_otg_exit);
diff --git a/drivers/usb/otg/mv_otg.h b/drivers/usb/otg/mv_otg.h
new file mode 100644
index 00000000000..be6ca143764
--- /dev/null
+++ b/drivers/usb/otg/mv_otg.h
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2011 Marvell International Ltd. All rights reserved.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __MV_USB_OTG_CONTROLLER__
+#define __MV_USB_OTG_CONTROLLER__
+
+#include <linux/types.h>
+
+/* Command Register Bit Masks */
+#define USBCMD_RUN_STOP                 (0x00000001)
+#define USBCMD_CTRL_RESET               (0x00000002)
+
+/* otgsc Register Bit Masks */
+#define OTGSC_CTRL_VUSB_DISCHARGE               0x00000001
+#define OTGSC_CTRL_VUSB_CHARGE                  0x00000002
+#define OTGSC_CTRL_OTG_TERM                     0x00000008
+#define OTGSC_CTRL_DATA_PULSING                 0x00000010
+#define OTGSC_STS_USB_ID                        0x00000100
+#define OTGSC_STS_A_VBUS_VALID                  0x00000200
+#define OTGSC_STS_A_SESSION_VALID               0x00000400
+#define OTGSC_STS_B_SESSION_VALID               0x00000800
+#define OTGSC_STS_B_SESSION_END                 0x00001000
+#define OTGSC_STS_1MS_TOGGLE                    0x00002000
+#define OTGSC_STS_DATA_PULSING                  0x00004000
+#define OTGSC_INTSTS_USB_ID                     0x00010000
+#define OTGSC_INTSTS_A_VBUS_VALID               0x00020000
+#define OTGSC_INTSTS_A_SESSION_VALID            0x00040000
+#define OTGSC_INTSTS_B_SESSION_VALID            0x00080000
+#define OTGSC_INTSTS_B_SESSION_END              0x00100000
+#define OTGSC_INTSTS_1MS                        0x00200000
+#define OTGSC_INTSTS_DATA_PULSING               0x00400000
+#define OTGSC_INTR_USB_ID                       0x01000000
+#define OTGSC_INTR_A_VBUS_VALID                 0x02000000
+#define OTGSC_INTR_A_SESSION_VALID              0x04000000
+#define OTGSC_INTR_B_SESSION_VALID              0x08000000
+#define OTGSC_INTR_B_SESSION_END                0x10000000
+#define OTGSC_INTR_1MS_TIMER                    0x20000000
+#define OTGSC_INTR_DATA_PULSING                 0x40000000
+
+#define CAPLENGTH_MASK          (0xff)
+
+/* Timer's interval, unit 10ms */
+#define T_A_WAIT_VRISE          100
+#define T_A_WAIT_BCON           2000
+#define T_A_AIDL_BDIS           100
+#define T_A_BIDL_ADIS           20
+#define T_B_ASE0_BRST           400
+#define T_B_SE0_SRP             300
+#define T_B_SRP_FAIL            2000
+#define T_B_DATA_PLS            10
+#define T_B_SRP_INIT            100
+#define T_A_SRP_RSPNS           10
+#define T_A_DRV_RSM             5
+
+enum otg_function {
+        OTG_B_DEVICE = 0,
+        OTG_A_DEVICE
+};
+
+enum mv_otg_timer {
+        A_WAIT_BCON_TIMER = 0,
+        OTG_TIMER_NUM
+};
+
+/* PXA OTG state machine */
+struct mv_otg_ctrl {
+        /* internal variables */
+        u8 a_set_b_hnp_en;      /* A-Device set b_hnp_en */
+        u8 b_srp_done;
+        u8 b_hnp_en;
+
+        /* OTG inputs */
+        u8 a_bus_drop;
+        u8 a_bus_req;
+        u8 a_clr_err;
+        u8 a_bus_resume;
+        u8 a_bus_suspend;
+        u8 a_conn;
+        u8 a_sess_vld;
+        u8 a_srp_det;
+        u8 a_vbus_vld;
+        u8 b_bus_req;           /* B-Device Require Bus */
+        u8 b_bus_resume;
+        u8 b_bus_suspend;
+        u8 b_conn;
+        u8 b_se0_srp;
+        u8 b_sess_end;
+        u8 b_sess_vld;
+        u8 id;
+        u8 a_suspend_req;
+
+        /*Timer event */
+        u8 a_aidl_bdis_timeout;
+        u8 b_ase0_brst_timeout;
+        u8 a_bidl_adis_timeout;
+        u8 a_wait_bcon_timeout;
+
+        struct timer_list timer[OTG_TIMER_NUM];
+};
+
+#define VUSBHS_MAX_PORTS        8
+
+struct mv_otg_regs {
+        u32 usbcmd;             /* Command register */
+        u32 usbsts;             /* Status register */
+        u32 usbintr;            /* Interrupt enable */
+        u32 frindex;            /* Frame index */
+        u32 reserved1[1];
+        u32 deviceaddr;         /* Device Address */
+        u32 eplistaddr;         /* Endpoint List Address */
+        u32 ttctrl;             /* HOST TT status and control */
+        u32 burstsize;          /* Programmable Burst Size */
+        u32 txfilltuning;       /* Host Transmit Pre-Buffer Packet Tuning */
+        u32 reserved[4];
+        u32 epnak;              /* Endpoint NAK */
+        u32 epnaken;            /* Endpoint NAK Enable */
+        u32 configflag;         /* Configured Flag register */
+        u32 portsc[VUSBHS_MAX_PORTS];   /* Port Status/Control x, x = 1..8 */
+        u32 otgsc;
+        u32 usbmode;            /* USB Host/Device mode */
+        u32 epsetupstat;        /* Endpoint Setup Status */
+        u32 epprime;            /* Endpoint Initialize */
+        u32 epflush;            /* Endpoint De-initialize */
+        u32 epstatus;           /* Endpoint Status */
+        u32 epcomplete;         /* Endpoint Interrupt On Complete */
+        u32 epctrlx[16];        /* Endpoint Control, where x = 0.. 15 */
+        u32 mcr;                /* Mux Control */
+        u32 isr;                /* Interrupt Status */
+        u32 ier;                /* Interrupt Enable */
+};
+
+struct mv_otg {
+        struct otg_transceiver otg;
+        struct mv_otg_ctrl otg_ctrl;
+
+        /* base address */
+        void __iomem *phy_regs;
+        void __iomem *cap_regs;
+        struct mv_otg_regs __iomem *op_regs;
+
+        struct platform_device *pdev;
+        int irq;
+        u32 irq_status;
+        u32 irq_en;
+
+        struct delayed_work work;
+        struct workqueue_struct *qwork;
+
+        spinlock_t wq_lock;
+
+        struct mv_usb_platform_data *pdata;
+
+        unsigned int active;
+        unsigned int clock_gating;
+        unsigned int clknum;
+        struct clk *clk[0];
+};
+
+#endif
diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 08c679c0dde..e9a5b1d2615 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -95,25 +95,15 @@ struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
 /*
  *              syscfg functions
  */
-void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
+static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
 {
         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
 }
 
-void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable)
-{
-        usbhs_bset(priv, SYSCFG, HSE, enable ? HSE : 0);
-}
-
-void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable)
-{
-        usbhs_bset(priv, SYSCFG, USBE, enable ? USBE : 0);
-}
-
 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 {
-        u16 mask = DCFM | DRPD | DPRPU;
-        u16 val  = DCFM | DRPD;
+        u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
+        u16 val  = DCFM | DRPD | HSE | USBE;
         int has_otg = usbhs_get_dparam(priv, has_otg);
 
         if (has_otg)
@@ -130,8 +120,8 @@ void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 
 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
 {
-        u16 mask = DCFM | DRPD | DPRPU;
-        u16 val  = DPRPU;
+        u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
+        u16 val  = DPRPU | HSE | USBE;
 
         /*
          * if enable
@@ -142,6 +132,11 @@ void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
 }
 
+void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
+{
+        usbhs_write(priv, TESTMODE, mode);
+}
+
 /*
  *              frame functions
  */
@@ -229,7 +224,7 @@ static void usbhsc_bus_init(struct usbhs_priv *priv)
 /*
  *              device configuration
  */
-int usbhs_set_device_speed(struct usbhs_priv *priv, int devnum,
+int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
                            u16 upphub, u16 hubport, u16 speed)
 {
         struct device *dev = usbhs_priv_to_dev(priv);
@@ -301,18 +296,25 @@ static u32 usbhsc_default_pipe_type[] = {
  */
 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
 {
+        struct platform_device *pdev = usbhs_priv_to_pdev(priv);
         struct device *dev = usbhs_priv_to_dev(priv);
 
         if (enable) {
                 /* enable PM */
                 pm_runtime_get_sync(dev);
 
+                /* enable platform power */
+                usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
+
                 /* USB on */
                 usbhs_sys_clock_ctrl(priv, enable);
         } else {
                 /* USB off */
                 usbhs_sys_clock_ctrl(priv, enable);
 
+                /* disable platform power */
+                usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
+
                 /* disable PM */
                 pm_runtime_put_sync(dev);
         }
@@ -388,7 +390,7 @@ static void usbhsc_notify_hotplug(struct work_struct *work)
         usbhsc_hotplug(priv);
 }
 
-int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
+static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
 {
         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
         int delay = usbhs_get_dparam(priv, detection_delay);
@@ -398,7 +400,8 @@ int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
          * To make sure safety context,
          * use workqueue for usbhs_notify_hotplug
          */
-        schedule_delayed_work(&priv->notify_hotplug_work, delay);
+        schedule_delayed_work(&priv->notify_hotplug_work,
+                              msecs_to_jiffies(delay));
         return 0;
 }
 
@@ -637,18 +640,7 @@ static struct platform_driver renesas_usbhs_driver = {
         .remove         = __devexit_p(usbhs_remove),
 };
 
-static int __init usbhs_init(void)
-{
-        return platform_driver_register(&renesas_usbhs_driver);
-}
-
-static void __exit usbhs_exit(void)
-{
-        platform_driver_unregister(&renesas_usbhs_driver);
-}
-
-module_init(usbhs_init);
-module_exit(usbhs_exit);
+module_platform_driver(renesas_usbhs_driver);
 
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Renesas USB driver");
diff --git a/drivers/usb/renesas_usbhs/common.h b/drivers/usb/renesas_usbhs/common.h
index 8729da5c3be..d79b3e27db9 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -33,6 +33,7 @@ struct usbhs_priv;
 #define SYSCFG          0x0000
 #define BUSWAIT         0x0002
 #define DVSTCTR         0x0008
+#define TESTMODE        0x000C
 #define CFIFO           0x0014
 #define CFIFOSEL        0x0020
 #define CFIFOCTR        0x0022
@@ -275,19 +276,15 @@ u16 usbhs_read(struct usbhs_priv *priv, u32 reg);
 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data);
 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data);
 
-int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev);
-
 #define usbhs_lock(p, f) spin_lock_irqsave(usbhs_priv_to_lock(p), f)
 #define usbhs_unlock(p, f) spin_unlock_irqrestore(usbhs_priv_to_lock(p), f)
 
 /*
  * sysconfig
  */
-void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable);
-void usbhs_sys_hispeed_ctrl(struct usbhs_priv *priv, int enable);
-void usbhs_sys_usb_ctrl(struct usbhs_priv *priv, int enable);
 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable);
 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable);
+void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode);
 
 /*
  * usb request
@@ -311,7 +308,7 @@ int usbhs_frame_get_num(struct usbhs_priv *priv);
 /*
  * device config
  */
-int usbhs_set_device_speed(struct usbhs_priv *priv, int devnum, u16 upphub,
+int usbhs_set_device_config(struct usbhs_priv *priv, int devnum, u16 upphub,
                            u16 hubport, u16 speed);
 
 /*
diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index ffdf5d15085..b51fcd80d24 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -56,7 +56,7 @@ static struct usbhs_pkt_handle usbhsf_null_handler = {
 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
                     void (*done)(struct usbhs_priv *priv,
                                  struct usbhs_pkt *pkt),
-                    void *buf, int len, int zero)
+                    void *buf, int len, int zero, int sequence)
 {
         struct usbhs_priv *priv = usbhs_pipe_to_priv(pipe);
         struct device *dev = usbhs_priv_to_dev(priv);
@@ -90,6 +90,7 @@ void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
         pkt->zero       = zero;
         pkt->actual     = 0;
         pkt->done       = done;
+        pkt->sequence   = sequence;
 
         usbhs_unlock(priv, flags);
         /********************  spin unlock ******************/
@@ -481,6 +482,9 @@ static int usbhsf_pio_try_push(struct usbhs_pkt *pkt, int *is_done)
         int i, ret, len;
         int is_short;
 
+        usbhs_pipe_data_sequence(pipe, pkt->sequence);
+        pkt->sequence = -1; /* -1 sequence will be ignored */
+
         ret = usbhsf_fifo_select(pipe, fifo, 1);
         if (ret < 0)
                 return 0;
@@ -584,6 +588,8 @@ static int usbhsf_prepare_pop(struct usbhs_pkt *pkt, int *is_done)
         /*
          * pipe enable to prepare packet receive
          */
+        usbhs_pipe_data_sequence(pipe, pkt->sequence);
+        pkt->sequence = -1; /* -1 sequence will be ignored */
 
         usbhs_pipe_enable(pipe);
         usbhsf_rx_irq_ctrl(pipe, 1);
@@ -641,6 +647,7 @@ static int usbhsf_pio_try_pop(struct usbhs_pkt *pkt, int *is_done)
          * "Operation" - "FIFO Buffer Memory" - "FIFO Port Function"
          */
         if (0 == rcv_len) {
+                pkt->zero = 1;
                 usbhsf_fifo_clear(pipe, fifo);
                 goto usbhs_fifo_read_end;
         }
diff --git a/drivers/usb/renesas_usbhs/fifo.h b/drivers/usb/renesas_usbhs/fifo.h
index 32a7b246b28..f68609c0f48 100644
--- a/drivers/usb/renesas_usbhs/fifo.h
+++ b/drivers/usb/renesas_usbhs/fifo.h
@@ -59,6 +59,7 @@ struct usbhs_pkt {
         int trans;
         int actual;
         int zero;
+        int sequence;
 };
 
 struct usbhs_pkt_handle {
@@ -95,7 +96,7 @@ void usbhs_pkt_init(struct usbhs_pkt *pkt);
 void usbhs_pkt_push(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt,
                     void (*done)(struct usbhs_priv *priv,
                                  struct usbhs_pkt *pkt),
-                    void *buf, int len, int zero);
+                    void *buf, int len, int zero, int sequence);
 struct usbhs_pkt *usbhs_pkt_pop(struct usbhs_pipe *pipe, struct usbhs_pkt *pkt);
 void usbhs_pkt_start(struct usbhs_pipe *pipe);
 
diff --git a/drivers/usb/renesas_usbhs/mod.c b/drivers/usb/renesas_usbhs/mod.c
index ad96a389672..1b97fb12694 100644
--- a/drivers/usb/renesas_usbhs/mod.c
+++ b/drivers/usb/renesas_usbhs/mod.c
@@ -50,7 +50,9 @@ static int usbhsm_autonomy_irq_vbus(struct usbhs_priv *priv,
 {
         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
 
-        return usbhsc_drvcllbck_notify_hotplug(pdev);
+        renesas_usbhs_call_notify_hotplug(pdev);
+
+        return 0;
 }
 
 void usbhs_mod_autonomy_mode(struct usbhs_priv *priv)
diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c
index 7f4e8033857..528691d5f3e 100644
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -14,6 +14,7 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  *
  */
+#include <linux/delay.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
 #include <linux/module.h>
@@ -44,7 +45,6 @@ struct usbhsg_uep {
 struct usbhsg_gpriv {
         struct usb_gadget        gadget;
         struct usbhs_mod         mod;
-        struct list_head         link;
 
         struct usbhsg_uep       *uep;
         int                      uep_size;
@@ -114,16 +114,6 @@ struct usbhsg_recip_handle {
 #define usbhsg_status_clr(gp, b) (gp->status &= ~b)
 #define usbhsg_status_has(gp, b) (gp->status &   b)
 
-/* controller */
-LIST_HEAD(the_controller_link);
-
-#define usbhsg_for_each_controller(gpriv)\
-        list_for_each_entry(gpriv, &the_controller_link, link)
-#define usbhsg_controller_register(gpriv)\
-        list_add_tail(&(gpriv)->link, &the_controller_link)
-#define usbhsg_controller_unregister(gpriv)\
-        list_del_init(&(gpriv)->link)
-
 /*
  *              queue push/pop
  */
@@ -164,7 +154,7 @@ static void usbhsg_queue_push(struct usbhsg_uep *uep,
         req->actual = 0;
         req->status = -EINPROGRESS;
         usbhs_pkt_push(pipe, pkt, usbhsg_queue_done,
-                       req->buf, req->length, req->zero);
+                       req->buf, req->length, req->zero, -1);
         usbhs_pkt_start(pipe);
 
         dev_dbg(dev, "pipe %d : queue push (%d)\n",
@@ -195,7 +185,7 @@ static int usbhsg_dma_map(struct device *dev,
         }
 
         if (dma_mapping_error(dev, pkt->dma)) {
-                dev_err(dev, "dma mapping error %x\n", pkt->dma);
+                dev_err(dev, "dma mapping error %llx\n", (u64)pkt->dma);
                 return -EIO;
         }
 
@@ -271,6 +261,8 @@ static int usbhsg_recip_handler_std_clear_endpoint(struct usbhs_priv *priv,
 
         usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
 
+        usbhs_pkt_start(pipe);
+
         return 0;
 }
 
@@ -282,6 +274,145 @@ struct usbhsg_recip_handle req_clear_feature = {
 };
 
 /*
+ *              USB_TYPE_STANDARD / set feature functions
+ */
+static int usbhsg_recip_handler_std_set_device(struct usbhs_priv *priv,
+                                                 struct usbhsg_uep *uep,
+                                                 struct usb_ctrlrequest *ctrl)
+{
+        switch (le16_to_cpu(ctrl->wValue)) {
+        case USB_DEVICE_TEST_MODE:
+                usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
+                udelay(100);
+                usbhs_sys_set_test_mode(priv, le16_to_cpu(ctrl->wIndex >> 8));
+                break;
+        default:
+                usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
+                break;
+        }
+
+        return 0;
+}
+
+static int usbhsg_recip_handler_std_set_endpoint(struct usbhs_priv *priv,
+                                                 struct usbhsg_uep *uep,
+                                                 struct usb_ctrlrequest *ctrl)
+{
+        struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+
+        usbhs_pipe_stall(pipe);
+
+        usbhsg_recip_handler_std_control_done(priv, uep, ctrl);
+
+        return 0;
+}
+
+struct usbhsg_recip_handle req_set_feature = {
+        .name           = "set feature",
+        .device         = usbhsg_recip_handler_std_set_device,
+        .interface      = usbhsg_recip_handler_std_control_done,
+        .endpoint       = usbhsg_recip_handler_std_set_endpoint,
+};
+
+/*
+ *              USB_TYPE_STANDARD / get status functions
+ */
+static void __usbhsg_recip_send_complete(struct usb_ep *ep,
+                                         struct usb_request *req)
+{
+        struct usbhsg_request *ureq = usbhsg_req_to_ureq(req);
+
+        /* free allocated recip-buffer/usb_request */
+        kfree(ureq->pkt.buf);
+        usb_ep_free_request(ep, req);
+}
+
+static void __usbhsg_recip_send_status(struct usbhsg_gpriv *gpriv,
+                                       unsigned short status)
+{
+        struct usbhsg_uep *dcp = usbhsg_gpriv_to_dcp(gpriv);
+        struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(dcp);
+        struct device *dev = usbhsg_gpriv_to_dev(gpriv);
+        struct usb_request *req;
+        unsigned short *buf;
+
+        /* alloc new usb_request for recip */
+        req = usb_ep_alloc_request(&dcp->ep, GFP_ATOMIC);
+        if (!req) {
+                dev_err(dev, "recip request allocation fail\n");
+                return;
+        }
+
+        /* alloc recip data buffer */
+        buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
+        if (!buf) {
+                usb_ep_free_request(&dcp->ep, req);
+                dev_err(dev, "recip data allocation fail\n");
+                return;
+        }
+
+        /* recip data is status */
+        *buf = cpu_to_le16(status);
+
+        /* allocated usb_request/buffer will be freed */
+        req->complete   = __usbhsg_recip_send_complete;
+        req->buf        = buf;
+        req->length     = sizeof(*buf);
+        req->zero       = 0;
+
+        /* push packet */
+        pipe->handler = &usbhs_fifo_pio_push_handler;
+        usbhsg_queue_push(dcp, usbhsg_req_to_ureq(req));
+}
+
+static int usbhsg_recip_handler_std_get_device(struct usbhs_priv *priv,
+                                               struct usbhsg_uep *uep,
+                                               struct usb_ctrlrequest *ctrl)
+{
+        struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+        unsigned short status = 1 << USB_DEVICE_SELF_POWERED;
+
+        __usbhsg_recip_send_status(gpriv, status);
+
+        return 0;
+}
+
+static int usbhsg_recip_handler_std_get_interface(struct usbhs_priv *priv,
+                                                  struct usbhsg_uep *uep,
+                                                  struct usb_ctrlrequest *ctrl)
+{
+        struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+        unsigned short status = 0;
+
+        __usbhsg_recip_send_status(gpriv, status);
+
+        return 0;
+}
+
+static int usbhsg_recip_handler_std_get_endpoint(struct usbhs_priv *priv,
+                                                 struct usbhsg_uep *uep,
+                                                 struct usb_ctrlrequest *ctrl)
+{
+        struct usbhsg_gpriv *gpriv = usbhsg_uep_to_gpriv(uep);
+        struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+        unsigned short status = 0;
+
+        if (usbhs_pipe_is_stall(pipe))
+                status = 1 << USB_ENDPOINT_HALT;
+
+        __usbhsg_recip_send_status(gpriv, status);
+
+        return 0;
+}
+
+struct usbhsg_recip_handle req_get_status = {
+        .name           = "get status",
+        .device         = usbhsg_recip_handler_std_get_device,
+        .interface      = usbhsg_recip_handler_std_get_interface,
+        .endpoint       = usbhsg_recip_handler_std_get_endpoint,
+};
+
+/*
  *              USB_TYPE handler
  */
 static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
@@ -303,8 +434,7 @@ static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
         pipe = usbhsg_uep_to_pipe(uep);
         if (!pipe) {
                 dev_err(dev, "wrong recip request\n");
-                ret = -EINVAL;
-                goto usbhsg_recip_run_handle_end;
+                return -EINVAL;
         }
 
         switch (recip) {
@@ -327,20 +457,10 @@ static int usbhsg_recip_run_handle(struct usbhs_priv *priv,
         }
 
         if (func) {
-                unsigned long flags;
-
                 dev_dbg(dev, "%s (pipe %d :%s)\n", handler->name, nth, msg);
-
-                /********************  spin lock ********************/
-                usbhs_lock(priv, flags);
                 ret = func(priv, uep, ctrl);
-                usbhs_unlock(priv, flags);
-                /********************  spin unlock ******************/
         }
 
-usbhsg_recip_run_handle_end:
-        usbhs_pkt_start(pipe);
-
         return ret;
 }
 
@@ -412,6 +532,12 @@ static int usbhsg_irq_ctrl_stage(struct usbhs_priv *priv,
                 case USB_REQ_CLEAR_FEATURE:
                         recip_handler = &req_clear_feature;
                         break;
+                case USB_REQ_SET_FEATURE:
+                        recip_handler = &req_set_feature;
+                        break;
+                case USB_REQ_GET_STATUS:
+                        recip_handler = &req_get_status;
+                        break;
                 }
         }
 
@@ -439,14 +565,16 @@ static int usbhsg_pipe_disable(struct usbhsg_uep *uep)
         struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
         struct usbhs_pkt *pkt;
 
-        usbhs_pipe_disable(pipe);
-
         while (1) {
                 pkt = usbhs_pkt_pop(pipe, NULL);
                 if (!pkt)
                         break;
+
+                usbhsg_queue_pop(uep, usbhsg_pkt_to_ureq(pkt), -ECONNRESET);
         }
 
+        usbhs_pipe_disable(pipe);
+
         return 0;
 }
 
@@ -681,9 +809,7 @@ static int usbhsg_try_start(struct usbhs_priv *priv, u32 status)
          * - function
          * - usb module
          */
-        usbhs_sys_hispeed_ctrl(priv, 1);
         usbhs_sys_function_ctrl(priv, 1);
-        usbhs_sys_usb_ctrl(priv, 1);
 
         /*
          * enable irq callback
@@ -731,9 +857,8 @@ static int usbhsg_try_stop(struct usbhs_priv *priv, u32 status)
         gpriv->gadget.speed = USB_SPEED_UNKNOWN;
 
         /* disable sys */
-        usbhs_sys_hispeed_ctrl(priv, 0);
+        usbhs_sys_set_test_mode(priv, 0);
         usbhs_sys_function_ctrl(priv, 0);
-        usbhs_sys_usb_ctrl(priv, 0);
 
         usbhsg_pipe_disable(dcp);
 
@@ -755,7 +880,7 @@ static int usbhsg_gadget_start(struct usb_gadget *gadget,
 
         if (!driver             ||
             !driver->setup      ||
-            driver->speed < USB_SPEED_FULL)
+            driver->max_speed < USB_SPEED_FULL)
                 return -EINVAL;
 
         /* first hook up the driver ... */
@@ -866,7 +991,7 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
         gpriv->gadget.dev.parent        = dev;
         gpriv->gadget.name              = "renesas_usbhs_udc";
         gpriv->gadget.ops               = &usbhsg_gadget_ops;
-        gpriv->gadget.is_dualspeed      = 1;
+        gpriv->gadget.max_speed         = USB_SPEED_HIGH;
         ret = device_register(&gpriv->gadget.dev);
         if (ret < 0)
                 goto err_add_udc;
@@ -896,8 +1021,6 @@ int usbhs_mod_gadget_probe(struct usbhs_priv *priv)
                 }
         }
 
-        usbhsg_controller_register(gpriv);
-
         ret = usb_add_gadget_udc(dev, &gpriv->gadget);
         if (ret)
                 goto err_register;
@@ -926,8 +1049,6 @@ void usbhs_mod_gadget_remove(struct usbhs_priv *priv)
 
         device_unregister(&gpriv->gadget.dev);
 
-        usbhsg_controller_unregister(gpriv);
-
         kfree(gpriv->uep);
         kfree(gpriv);
 }
diff --git a/drivers/usb/renesas_usbhs/mod_host.c b/drivers/usb/renesas_usbhs/mod_host.c
index 7955de58995..1834cf50888 100644
--- a/drivers/usb/renesas_usbhs/mod_host.c
+++ b/drivers/usb/renesas_usbhs/mod_host.c
@@ -45,36 +45,34 @@
  *
  * +--------+                                   pipes are reused for each uep.
  * | udev 1 |-+- [uep 0 (dcp) ] --+             pipe will be switched when
- * +--------+ |                   |             target device was changed
+ * +--------+ |                   |             other device requested
  *            +- [uep 1 (bulk)] --|---+            +--------------+
  *            |                   +--------------> | pipe0 (dcp)  |
- *            +- [uep 2 (bulk)] --|---|---+        +--------------+
- *                                |   |   |        | pipe1 (isoc) |
- * +--------+                     |   |   |        +--------------+
- * | udev 2 |-+- [uep 0 (dcp) ] --+   +-- |------> | pipe2 (bulk) |
- * +--------+ |                   |   |   |        +--------------+
- *            +- [uep 1 (int) ] --|-+ |   +------> | pipe3 (bulk) |
- *                                | | |   |        +--------------+
- * +--------+                     | +-|---|------> | pipe4 (int)  |
- * | udev 3 |-+- [uep 0 (dcp) ] --+   |   |        +--------------+
- * +--------+ |                       |   |        | ....         |
- *            +- [uep 1 (bulk)] ------+   |        | ....         |
+ *            +- [uep 2 (bulk)] -@    |            +--------------+
+ *                                    |            | pipe1 (isoc) |
+ * +--------+                         |            +--------------+
+ * | udev 2 |-+- [uep 0 (dcp) ] -@    +----------> | pipe2 (bulk) |
+ * +--------+ |                                    +--------------+
+ *            +- [uep 1 (int) ] ----+     +------> | pipe3 (bulk) |
+ *                                  |     |        +--------------+
+ * +--------+                       +-----|------> | pipe4 (int)  |
+ * | udev 3 |-+- [uep 0 (dcp) ] -@        |        +--------------+
+ * +--------+ |                           |        | ....         |
+ *            +- [uep 1 (bulk)] -@        |        | ....         |
  *            |                           |
  *            +- [uep 2 (bulk)]-----------+
+ *
+ * @ :  uep requested free pipe, but all have been used.
+ *      now it is waiting for free pipe
  */
 
 
 /*
  *              struct
  */
-struct usbhsh_pipe_info {
-        unsigned int            usr_cnt; /* see usbhsh_endpoint_alloc() */
-};
-
 struct usbhsh_request {
         struct urb              *urb;
         struct usbhs_pkt        pkt;
-        struct list_head        ureq_link; /* see hpriv :: ureq_link_xxx */
 };
 
 struct usbhsh_device {
@@ -83,11 +81,10 @@ struct usbhsh_device {
 };
 
 struct usbhsh_ep {
-        struct usbhs_pipe       *pipe;
+        struct usbhs_pipe       *pipe;   /* attached pipe */
         struct usbhsh_device    *udev;   /* attached udev */
+        struct usb_host_endpoint *ep;
         struct list_head        ep_list; /* list to usbhsh_device */
-
-        int maxp;
 };
 
 #define USBHSH_DEVICE_MAX       10 /* see DEVADDn / DCPMAXP / PIPEMAXP */
@@ -98,16 +95,9 @@ struct usbhsh_hpriv {
 
         struct usbhsh_device    udev[USBHSH_DEVICE_MAX];
 
-        struct usbhsh_pipe_info *pipe_info;
-        int                      pipe_size;
-
         u32     port_stat;      /* USB_PORT_STAT_xxx */
 
         struct completion       setup_ack_done;
-
-        /* see usbhsh_req_alloc/free */
-        struct list_head        ureq_link_active;
-        struct list_head        ureq_link_free;
 };
 
 
@@ -119,17 +109,6 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host";
 #define usbhsh_priv_to_hpriv(priv) \
         container_of(usbhs_mod_get(priv, USBHS_HOST), struct usbhsh_hpriv, mod)
 
-#define __usbhsh_for_each_hpipe(start, pos, h, i)       \
-        for (i = start, pos = (h)->hpipe + i;           \
-             i < (h)->hpipe_size;                       \
-             i++, pos = (h)->hpipe + i)
-
-#define usbhsh_for_each_hpipe(pos, hpriv, i)    \
-        __usbhsh_for_each_hpipe(1, pos, hpriv, i)
-
-#define usbhsh_for_each_hpipe_with_dcp(pos, hpriv, i)   \
-        __usbhsh_for_each_hpipe(0, pos, hpriv, i)
-
 #define __usbhsh_for_each_udev(start, pos, h, i)        \
         for (i = start, pos = (h)->udev + i;            \
              i < USBHSH_DEVICE_MAX;                     \
@@ -152,15 +131,20 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host";
 #define usbhsh_ep_to_uep(u)     ((u)->hcpriv)
 #define usbhsh_uep_to_pipe(u)   ((u)->pipe)
 #define usbhsh_uep_to_udev(u)   ((u)->udev)
+#define usbhsh_uep_to_ep(u)     ((u)->ep)
+
 #define usbhsh_urb_to_ureq(u)   ((u)->hcpriv)
 #define usbhsh_urb_to_usbv(u)   ((u)->dev)
 
 #define usbhsh_usbv_to_udev(d)  dev_get_drvdata(&(d)->dev)
 
 #define usbhsh_udev_to_usbv(h)  ((h)->usbv)
+#define usbhsh_udev_is_used(h)  usbhsh_udev_to_usbv(h)
 
-#define usbhsh_pipe_info(p)     ((p)->mod_private)
+#define usbhsh_pipe_to_uep(p)   ((p)->mod_private)
 
+#define usbhsh_device_parent(d)         (usbhsh_usbv_to_udev((d)->usbv->parent))
+#define usbhsh_device_hubport(d)        ((d)->usbv->portnum)
 #define usbhsh_device_number(h, d)      ((int)((d) - (h)->udev))
 #define usbhsh_device_nth(h, d)         ((h)->udev + d)
 #define usbhsh_device0(h)               usbhsh_device_nth(h, 0)
@@ -170,38 +154,13 @@ static const char usbhsh_hcd_name[] = "renesas_usbhs host";
 #define usbhsh_port_stat_clear(h, s)    ((h)->port_stat &= ~(s))
 #define usbhsh_port_stat_get(h)         ((h)->port_stat)
 
-#define usbhsh_pkt_to_req(p)    \
+#define usbhsh_pkt_to_ureq(p)   \
         container_of((void *)p, struct usbhsh_request, pkt)
 
 /*
  *              req alloc/free
  */
-static void usbhsh_req_list_init(struct usbhsh_hpriv *hpriv)
-{
-        INIT_LIST_HEAD(&hpriv->ureq_link_active);
-        INIT_LIST_HEAD(&hpriv->ureq_link_free);
-}
-
-static void usbhsh_req_list_quit(struct usbhsh_hpriv *hpriv)
-{
-        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
-        struct device *dev = usbhsh_hcd_to_dev(hcd);
-        struct usbhsh_request *ureq, *next;
-
-        /* kfree all active ureq */
-        list_for_each_entry_safe(ureq, next,
-                                 &hpriv->ureq_link_active,
-                                 ureq_link) {
-                dev_err(dev, "active ureq (%p) is force freed\n", ureq);
-                kfree(ureq);
-        }
-
-        /* kfree all free ureq */
-        list_for_each_entry_safe(ureq, next, &hpriv->ureq_link_free, ureq_link)
-                kfree(ureq);
-}
-
-static struct usbhsh_request *usbhsh_req_alloc(struct usbhsh_hpriv *hpriv,
+static struct usbhsh_request *usbhsh_ureq_alloc(struct usbhsh_hpriv *hpriv,
                                                struct urb *urb,
                                                gfp_t mem_flags)
 {
@@ -209,270 +168,460 @@ static struct usbhsh_request *usbhsh_req_alloc(struct usbhsh_hpriv *hpriv,
         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
         struct device *dev = usbhs_priv_to_dev(priv);
 
-        if (list_empty(&hpriv->ureq_link_free)) {
-                /*
-                 * create new one if there is no free ureq
-                 */
-                ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
-                if (ureq)
-                        INIT_LIST_HEAD(&ureq->ureq_link);
-        } else {
-                /*
-                 * reuse "free" ureq if exist
-                 */
-                ureq = list_entry(hpriv->ureq_link_free.next,
-                                  struct usbhsh_request,
-                                  ureq_link);
-                if (ureq)
-                        list_del_init(&ureq->ureq_link);
-        }
-
+        ureq = kzalloc(sizeof(struct usbhsh_request), mem_flags);
         if (!ureq) {
                 dev_err(dev, "ureq alloc fail\n");
                 return NULL;
         }
 
         usbhs_pkt_init(&ureq->pkt);
-
-        /*
-         * push it to "active" list
-         */
-        list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_active);
         ureq->urb = urb;
+        usbhsh_urb_to_ureq(urb) = ureq;
 
         return ureq;
 }
 
-static void usbhsh_req_free(struct usbhsh_hpriv *hpriv,
+static void usbhsh_ureq_free(struct usbhsh_hpriv *hpriv,
                             struct usbhsh_request *ureq)
 {
-        struct usbhs_pkt *pkt = &ureq->pkt;
+        usbhsh_urb_to_ureq(ureq->urb) = NULL;
+        ureq->urb = NULL;
 
-        usbhs_pkt_init(pkt);
+        kfree(ureq);
+}
 
+/*
+ *              status
+ */
+static int usbhsh_is_running(struct usbhsh_hpriv *hpriv)
+{
         /*
-         * removed from "active" list,
-         * and push it to "free" list
+         * we can decide some device is attached or not
+         * by checking mod.irq_attch
+         * see
+         *      usbhsh_irq_attch()
+         *      usbhsh_irq_dtch()
          */
-        ureq->urb = NULL;
-        list_del_init(&ureq->ureq_link);
-        list_add_tail(&ureq->ureq_link, &hpriv->ureq_link_free);
+        return (hpriv->mod.irq_attch == NULL);
 }
 
 /*
- *              device control
+ *              pipe control
  */
-
-static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
+static void usbhsh_endpoint_sequence_save(struct usbhsh_hpriv *hpriv,
+                                          struct urb *urb,
+                                          struct usbhs_pkt *pkt)
 {
-        return !list_empty(&udev->ep_list_head);
-}
+        int len = urb->actual_length;
+        int maxp = usb_endpoint_maxp(&urb->ep->desc);
+        int t = 0;
 
-static struct usbhsh_device *usbhsh_device_alloc(struct usbhsh_hpriv *hpriv,
-                                                 struct urb *urb)
-{
-        struct usbhsh_device *udev = NULL;
-        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
-        struct device *dev = usbhsh_hcd_to_dev(hcd);
-        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
-        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
-        int i;
+        /* DCP is out of sequence control */
+        if (usb_pipecontrol(urb->pipe))
+                return;
 
         /*
-         * device 0
+         * renesas_usbhs pipe has a limitation in a number.
+         * So, driver should re-use the limited pipe for each device/endpoint.
+         * DATA0/1 sequence should be saved for it.
+         * see [image of mod_host]
+         *     [HARDWARE LIMITATION]
          */
-        if (0 == usb_pipedevice(urb->pipe)) {
-                udev = usbhsh_device0(hpriv);
-                goto usbhsh_device_find;
-        }
 
         /*
-         * find unused device
+         * next sequence depends on actual_length
+         *
+         * ex) actual_length = 1147, maxp = 512
+         * data0 : 512
+         * data1 : 512
+         * data0 : 123
+         * data1 is the next sequence
          */
-        usbhsh_for_each_udev(udev, hpriv, i) {
-                if (usbhsh_udev_to_usbv(udev))
-                        continue;
-                goto usbhsh_device_find;
+        t = len / maxp;
+        if (len % maxp)
+                t++;
+        if (pkt->zero)
+                t++;
+        t %= 2;
+
+        if (t)
+                usb_dotoggle(urb->dev,
+                             usb_pipeendpoint(urb->pipe),
+                             usb_pipeout(urb->pipe));
+}
+
+static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
+                                               struct urb *urb);
+
+static int usbhsh_pipe_attach(struct usbhsh_hpriv *hpriv,
+                              struct urb *urb)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
+        struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
+        struct usbhs_pipe *pipe;
+        struct usb_endpoint_descriptor *desc = &urb->ep->desc;
+        struct device *dev = usbhs_priv_to_dev(priv);
+        unsigned long flags;
+        int dir_in_req = !!usb_pipein(urb->pipe);
+        int is_dcp = usb_endpoint_xfer_control(desc);
+        int i, dir_in;
+        int ret = -EBUSY;
+
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
+
+        if (unlikely(usbhsh_uep_to_pipe(uep))) {
+                dev_err(dev, "uep already has pipe\n");
+                goto usbhsh_pipe_attach_done;
         }
 
-        dev_err(dev, "no free usbhsh_device\n");
+        usbhs_for_each_pipe_with_dcp(pipe, priv, i) {
 
-        return NULL;
+                /* check pipe type */
+                if (!usbhs_pipe_type_is(pipe, usb_endpoint_type(desc)))
+                        continue;
 
-usbhsh_device_find:
-        if (usbhsh_device_has_endpoint(udev))
-                dev_warn(dev, "udev have old endpoint\n");
+                /* check pipe direction if normal pipe */
+                if (!is_dcp) {
+                        dir_in = !!usbhs_pipe_is_dir_in(pipe);
+                        if (0 != (dir_in - dir_in_req))
+                                continue;
+                }
 
-        /* uep will be attached */
-        INIT_LIST_HEAD(&udev->ep_list_head);
+                /* check pipe is free */
+                if (usbhsh_pipe_to_uep(pipe))
+                        continue;
 
-        /*
-         * usbhsh_usbv_to_udev()
-         * usbhsh_udev_to_usbv()
-         * will be enable
-         */
-        dev_set_drvdata(&usbv->dev, udev);
-        udev->usbv = usbv;
+                /*
+                 * attach pipe to uep
+                 *
+                 * usbhs_pipe_config_update() should be called after
+                 * usbhs_set_device_config()
+                 * see
+                 *  DCPMAXP/PIPEMAXP
+                 */
+                usbhsh_uep_to_pipe(uep)         = pipe;
+                usbhsh_pipe_to_uep(pipe)        = uep;
 
-        /* set device config */
-        usbhs_set_device_speed(priv,
-                               usbhsh_device_number(hpriv, udev),
-                               usbhsh_device_number(hpriv, udev),
-                               0, /* FIXME no parent */
-                               usbv->speed);
+                usbhs_pipe_config_update(pipe,
+                                         usbhsh_device_number(hpriv, udev),
+                                         usb_endpoint_num(desc),
+                                         usb_endpoint_maxp(desc));
 
-        dev_dbg(dev, "%s [%d](%p)\n", __func__,
-                usbhsh_device_number(hpriv, udev), udev);
+                dev_dbg(dev, "%s [%d-%d(%s:%s)]\n", __func__,
+                        usbhsh_device_number(hpriv, udev),
+                        usb_endpoint_num(desc),
+                        usbhs_pipe_name(pipe),
+                        dir_in_req ? "in" : "out");
 
-        return udev;
+                ret = 0;
+                break;
+        }
+
+usbhsh_pipe_attach_done:
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
+
+        return ret;
 }
 
-static void usbhsh_device_free(struct usbhsh_hpriv *hpriv,
-                               struct usbhsh_device *udev)
+static void usbhsh_pipe_detach(struct usbhsh_hpriv *hpriv,
+                               struct usbhsh_ep *uep)
 {
-        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
-        struct device *dev = usbhsh_hcd_to_dev(hcd);
-        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct usbhs_pipe *pipe;
+        struct device *dev = usbhs_priv_to_dev(priv);
+        unsigned long flags;
 
-        dev_dbg(dev, "%s [%d](%p)\n", __func__,
-                usbhsh_device_number(hpriv, udev), udev);
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
 
-        if (usbhsh_device_has_endpoint(udev))
-                dev_warn(dev, "udev still have endpoint\n");
+        pipe = usbhsh_uep_to_pipe(uep);
 
-        /*
-         * usbhsh_usbv_to_udev()
-         * usbhsh_udev_to_usbv()
-         * will be disable
-         */
-        dev_set_drvdata(&usbv->dev, NULL);
-        udev->usbv = NULL;
+        if (unlikely(!pipe)) {
+                dev_err(dev, "uep doens't have pipe\n");
+        } else {
+                struct usb_host_endpoint *ep = usbhsh_uep_to_ep(uep);
+                struct usbhsh_device *udev = usbhsh_uep_to_udev(uep);
+
+                /* detach pipe from uep */
+                usbhsh_uep_to_pipe(uep)         = NULL;
+                usbhsh_pipe_to_uep(pipe)        = NULL;
+
+                dev_dbg(dev, "%s [%d-%d(%s)]\n", __func__,
+                        usbhsh_device_number(hpriv, udev),
+                        usb_endpoint_num(&ep->desc),
+                        usbhs_pipe_name(pipe));
+        }
+
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
 }
 
 /*
- *              end-point control
+ *              endpoint control
  */
-struct usbhsh_ep *usbhsh_endpoint_alloc(struct usbhsh_hpriv *hpriv,
-                                        struct usbhsh_device *udev,
-                                        struct usb_host_endpoint *ep,
-                                        int dir_in_req,
-                                        gfp_t mem_flags)
+static int usbhsh_endpoint_attach(struct usbhsh_hpriv *hpriv,
+                                  struct urb *urb,
+                                  gfp_t mem_flags)
 {
         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
-        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct usbhsh_device *udev = usbhsh_device_get(hpriv, urb);
+        struct usb_host_endpoint *ep = urb->ep;
         struct usbhsh_ep *uep;
-        struct usbhsh_pipe_info *info;
-        struct usbhs_pipe *pipe, *best_pipe;
-        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct device *dev = usbhs_priv_to_dev(priv);
         struct usb_endpoint_descriptor *desc = &ep->desc;
-        int type, i, dir_in;
-        unsigned int min_usr;
-
-        dir_in_req = !!dir_in_req;
+        unsigned long flags;
 
         uep = kzalloc(sizeof(struct usbhsh_ep), mem_flags);
         if (!uep) {
                 dev_err(dev, "usbhsh_ep alloc fail\n");
-                return NULL;
+                return -ENOMEM;
         }
 
-        if (usb_endpoint_xfer_control(desc)) {
-                best_pipe = usbhsh_hpriv_to_dcp(hpriv);
-                goto usbhsh_endpoint_alloc_find_pipe;
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
+
+        /*
+         * init endpoint
+         */
+        INIT_LIST_HEAD(&uep->ep_list);
+        list_add_tail(&uep->ep_list, &udev->ep_list_head);
+
+        usbhsh_uep_to_udev(uep) = udev;
+        usbhsh_uep_to_ep(uep)   = ep;
+        usbhsh_ep_to_uep(ep)    = uep;
+
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
+
+        dev_dbg(dev, "%s [%d-%d]\n", __func__,
+                usbhsh_device_number(hpriv, udev),
+                usb_endpoint_num(desc));
+
+        return 0;
+}
+
+static void usbhsh_endpoint_detach(struct usbhsh_hpriv *hpriv,
+                                   struct usb_host_endpoint *ep)
+{
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        struct device *dev = usbhs_priv_to_dev(priv);
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
+        unsigned long flags;
+
+        if (!uep)
+                return;
+
+        dev_dbg(dev, "%s [%d-%d]\n", __func__,
+                usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
+                usb_endpoint_num(&ep->desc));
+
+        if (usbhsh_uep_to_pipe(uep))
+                usbhsh_pipe_detach(hpriv, uep);
+
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
+
+        /* remove this endpoint from udev */
+        list_del_init(&uep->ep_list);
+
+        usbhsh_uep_to_udev(uep) = NULL;
+        usbhsh_uep_to_ep(uep)   = NULL;
+        usbhsh_ep_to_uep(ep)    = NULL;
+
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
+
+        kfree(uep);
+}
+
+static void usbhsh_endpoint_detach_all(struct usbhsh_hpriv *hpriv,
+                                       struct usbhsh_device *udev)
+{
+        struct usbhsh_ep *uep, *next;
+
+        list_for_each_entry_safe(uep, next, &udev->ep_list_head, ep_list)
+                usbhsh_endpoint_detach(hpriv, usbhsh_uep_to_ep(uep));
+}
+
+/*
+ *              device control
+ */
+static int usbhsh_connected_to_rhdev(struct usb_hcd *hcd,
+                                     struct usbhsh_device *udev)
+{
+        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+
+        return hcd->self.root_hub == usbv->parent;
+}
+
+static int usbhsh_device_has_endpoint(struct usbhsh_device *udev)
+{
+        return !list_empty(&udev->ep_list_head);
+}
+
+static struct usbhsh_device *usbhsh_device_get(struct usbhsh_hpriv *hpriv,
+                                               struct urb *urb)
+{
+        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+        struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
+
+        /* usbhsh_device_attach() is still not called */
+        if (!udev)
+                return NULL;
+
+        /* if it is device0, return it */
+        if (0 == usb_pipedevice(urb->pipe))
+                return usbhsh_device0(hpriv);
+
+        /* return attached device */
+        return udev;
+}
+
+static struct usbhsh_device *usbhsh_device_attach(struct usbhsh_hpriv *hpriv,
+                                                 struct urb *urb)
+{
+        struct usbhsh_device *udev = NULL;
+        struct usbhsh_device *udev0 = usbhsh_device0(hpriv);
+        struct usbhsh_device *pos;
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+        struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+        unsigned long flags;
+        u16 upphub, hubport;
+        int i;
+
+        /*
+         * This function should be called only while urb is pointing to device0.
+         * It will attach unused usbhsh_device to urb (usbv),
+         * and initialize device0.
+         * You can use usbhsh_device_get() to get "current" udev,
+         * and usbhsh_usbv_to_udev() is for "attached" udev.
+         */
+        if (0 != usb_pipedevice(urb->pipe)) {
+                dev_err(dev, "%s fail: urb isn't pointing device0\n", __func__);
+                return NULL;
         }
 
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
+
         /*
-         * find best pipe for endpoint
-         * see
-         *      HARDWARE LIMITATION
+         * find unused device
          */
-        type = usb_endpoint_type(desc);
-        min_usr = ~0;
-        best_pipe = NULL;
-        usbhs_for_each_pipe(pipe, priv, i) {
-                if (!usbhs_pipe_type_is(pipe, type))
+        usbhsh_for_each_udev(pos, hpriv, i) {
+                if (usbhsh_udev_is_used(pos))
                         continue;
+                udev = pos;
+                break;
+        }
 
-                dir_in = !!usbhs_pipe_is_dir_in(pipe);
-                if (0 != (dir_in - dir_in_req))
-                        continue;
+        if (udev) {
+                /*
+                 * usbhsh_usbv_to_udev()
+                 * usbhsh_udev_to_usbv()
+                 * will be enable
+                 */
+                dev_set_drvdata(&usbv->dev, udev);
+                udev->usbv = usbv;
+        }
 
-                info = usbhsh_pipe_info(pipe);
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
 
-                if (min_usr > info->usr_cnt) {
-                        min_usr         = info->usr_cnt;
-                        best_pipe       = pipe;
-                }
+        if (!udev) {
+                dev_err(dev, "no free usbhsh_device\n");
+                return NULL;
         }
 
-        if (unlikely(!best_pipe)) {
-                dev_err(dev, "couldn't find best pipe\n");
-                kfree(uep);
-                return NULL;
+        if (usbhsh_device_has_endpoint(udev)) {
+                dev_warn(dev, "udev have old endpoint\n");
+                usbhsh_endpoint_detach_all(hpriv, udev);
+        }
+
+        if (usbhsh_device_has_endpoint(udev0)) {
+                dev_warn(dev, "udev0 have old endpoint\n");
+                usbhsh_endpoint_detach_all(hpriv, udev0);
         }
-usbhsh_endpoint_alloc_find_pipe:
+
+        /* uep will be attached */
+        INIT_LIST_HEAD(&udev0->ep_list_head);
+        INIT_LIST_HEAD(&udev->ep_list_head);
+
         /*
-         * init uep
+         * set device0 config
          */
-        uep->pipe       = best_pipe;
-        uep->maxp       = usb_endpoint_maxp(desc);
-        usbhsh_uep_to_udev(uep) = udev;
-        usbhsh_ep_to_uep(ep)    = uep;
+        usbhs_set_device_config(priv,
+                                0, 0, 0, usbv->speed);
 
         /*
-         * update pipe user count
+         * set new device config
          */
-        info = usbhsh_pipe_info(best_pipe);
-        info->usr_cnt++;
+        upphub  = 0;
+        hubport = 0;
+        if (!usbhsh_connected_to_rhdev(hcd, udev)) {
+                /* if udev is not connected to rhdev, it means parent is Hub */
+                struct usbhsh_device *parent = usbhsh_device_parent(udev);
 
-        /* init this endpoint, and attach it to udev */
-        INIT_LIST_HEAD(&uep->ep_list);
-        list_add_tail(&uep->ep_list, &udev->ep_list_head);
+                upphub  = usbhsh_device_number(hpriv, parent);
+                hubport = usbhsh_device_hubport(udev);
 
-        /*
-         * usbhs_pipe_config_update() should be called after
-         * usbhs_device_config()
-         * see
-         *  DCPMAXP/PIPEMAXP
-         */
-        usbhs_pipe_sequence_data0(uep->pipe);
-        usbhs_pipe_config_update(uep->pipe,
-                                 usbhsh_device_number(hpriv, udev),
-                                 usb_endpoint_num(desc),
-                                 uep->maxp);
+                dev_dbg(dev, "%s connecte to Hub [%d:%d](%p)\n", __func__,
+                        upphub, hubport, parent);
+        }
 
-        dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
-                usbhsh_device_number(hpriv, udev),
-                usbhs_pipe_name(uep->pipe), uep);
+        usbhs_set_device_config(priv,
+                               usbhsh_device_number(hpriv, udev),
+                               upphub, hubport, usbv->speed);
 
-        return uep;
+        dev_dbg(dev, "%s [%d](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev), udev);
+
+        return udev;
 }
 
-void usbhsh_endpoint_free(struct usbhsh_hpriv *hpriv,
-                          struct usb_host_endpoint *ep)
+static void usbhsh_device_detach(struct usbhsh_hpriv *hpriv,
+                               struct usbhsh_device *udev)
 {
+        struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
-        struct device *dev = usbhs_priv_to_dev(priv);
-        struct usbhsh_ep *uep = usbhsh_ep_to_uep(ep);
-        struct usbhsh_pipe_info *info;
+        struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usb_device *usbv = usbhsh_udev_to_usbv(udev);
+        unsigned long flags;
 
-        if (!uep)
-                return;
+        dev_dbg(dev, "%s [%d](%p)\n", __func__,
+                usbhsh_device_number(hpriv, udev), udev);
 
-        dev_dbg(dev, "%s [%d-%s](%p)\n", __func__,
-                usbhsh_device_number(hpriv, usbhsh_uep_to_udev(uep)),
-                usbhs_pipe_name(uep->pipe), uep);
+        if (usbhsh_device_has_endpoint(udev)) {
+                dev_warn(dev, "udev still have endpoint\n");
+                usbhsh_endpoint_detach_all(hpriv, udev);
+        }
 
-        info = usbhsh_pipe_info(uep->pipe);
-        info->usr_cnt--;
+        /*
+         * There is nothing to do if it is device0.
+         * see
+         *  usbhsh_device_attach()
+         *  usbhsh_device_get()
+         */
+        if (0 == usbhsh_device_number(hpriv, udev))
+                return;
 
-        /* remove this endpoint from udev */
-        list_del_init(&uep->ep_list);
+        /********************  spin lock ********************/
+        usbhs_lock(priv, flags);
 
-        usbhsh_uep_to_udev(uep) = NULL;
-        usbhsh_ep_to_uep(ep) = NULL;
+        /*
+         * usbhsh_usbv_to_udev()
+         * usbhsh_udev_to_usbv()
+         * will be disable
+         */
+        dev_set_drvdata(&usbv->dev, NULL);
+        udev->usbv = NULL;
 
-        kfree(uep);
+        usbhs_unlock(priv, flags);
+        /********************  spin unlock ******************/
 }
 
 /*
@@ -480,11 +629,12 @@ void usbhsh_endpoint_free(struct usbhsh_hpriv *hpriv,
  */
 static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
 {
-        struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+        struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
         struct urb *urb = ureq->urb;
         struct device *dev = usbhs_priv_to_dev(priv);
+        int status = 0;
 
         dev_dbg(dev, "%s\n", __func__);
 
@@ -493,29 +643,43 @@ static void usbhsh_queue_done(struct usbhs_priv *priv, struct usbhs_pkt *pkt)
                 return;
         }
 
+        if (!usbhsh_is_running(hpriv))
+                status = -ESHUTDOWN;
+
         urb->actual_length = pkt->actual;
-        usbhsh_req_free(hpriv, ureq);
-        usbhsh_urb_to_ureq(urb) = NULL;
+        usbhsh_ureq_free(hpriv, ureq);
+
+        usbhsh_endpoint_sequence_save(hpriv, urb, pkt);
+        usbhsh_pipe_detach(hpriv, usbhsh_ep_to_uep(urb->ep));
 
         usb_hcd_unlink_urb_from_ep(hcd, urb);
-        usb_hcd_giveback_urb(hcd, urb, 0);
+        usb_hcd_giveback_urb(hcd, urb, status);
 }
 
 static int usbhsh_queue_push(struct usb_hcd *hcd,
-                             struct usbhs_pipe *pipe,
-                             struct urb *urb)
+                             struct urb *urb,
+                             gfp_t mem_flags)
 {
-        struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
-        struct usbhs_pkt *pkt = &ureq->pkt;
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
+        struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
         struct device *dev = usbhsh_hcd_to_dev(hcd);
+        struct usbhsh_request *ureq;
         void *buf;
-        int len;
+        int len, sequence;
 
         if (usb_pipeisoc(urb->pipe)) {
                 dev_err(dev, "pipe iso is not supported now\n");
                 return -EIO;
         }
 
+        /* this ureq will be freed on usbhsh_queue_done() */
+        ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
+        if (unlikely(!ureq)) {
+                dev_err(dev, "ureq alloc fail\n");
+                return -ENOMEM;
+        }
+
         if (usb_pipein(urb->pipe))
                 pipe->handler = &usbhs_fifo_pio_pop_handler;
         else
@@ -524,25 +688,59 @@ static int usbhsh_queue_push(struct usb_hcd *hcd,
         buf = (void *)(urb->transfer_buffer + urb->actual_length);
         len = urb->transfer_buffer_length - urb->actual_length;
 
+        sequence = usb_gettoggle(urb->dev,
+                                 usb_pipeendpoint(urb->pipe),
+                                 usb_pipeout(urb->pipe));
+
         dev_dbg(dev, "%s\n", __func__);
-        usbhs_pkt_push(pipe, pkt, usbhsh_queue_done,
-                       buf, len, (urb->transfer_flags & URB_ZERO_PACKET));
+        usbhs_pkt_push(pipe, &ureq->pkt, usbhsh_queue_done,
+                       buf, len, (urb->transfer_flags & URB_ZERO_PACKET),
+                       sequence);
+
         usbhs_pkt_start(pipe);
 
         return 0;
 }
 
+static void usbhsh_queue_force_pop(struct usbhs_priv *priv,
+                                   struct usbhs_pipe *pipe)
+{
+        struct usbhs_pkt *pkt;
+
+        while (1) {
+                pkt = usbhs_pkt_pop(pipe, NULL);
+                if (!pkt)
+                        break;
+
+                /*
+                 * if all packet are gone, usbhsh_endpoint_disable()
+                 * will be called.
+                 * then, attached device/endpoint/pipe will be detached
+                 */
+                usbhsh_queue_done(priv, pkt);
+        }
+}
+
+static void usbhsh_queue_force_pop_all(struct usbhs_priv *priv)
+{
+        struct usbhs_pipe *pos;
+        int i;
+
+        usbhs_for_each_pipe_with_dcp(pos, priv, i)
+                usbhsh_queue_force_pop(priv, pos);
+}
+
 /*
  *              DCP setup stage
  */
 static int usbhsh_is_request_address(struct urb *urb)
 {
-        struct usb_ctrlrequest *cmd;
+        struct usb_ctrlrequest *req;
 
-        cmd = (struct usb_ctrlrequest *)urb->setup_packet;
+        req = (struct usb_ctrlrequest *)urb->setup_packet;
 
-        if ((DeviceOutRequest    == cmd->bRequestType << 8) &&
-            (USB_REQ_SET_ADDRESS == cmd->bRequest))
+        if ((DeviceOutRequest    == req->bRequestType << 8) &&
+            (USB_REQ_SET_ADDRESS == req->bRequest))
                 return 1;
         else
                 return 0;
@@ -570,11 +768,15 @@ static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
         /*
          * renesas_usbhs can not use original usb address.
          * see HARDWARE LIMITATION.
-         * modify usb address here.
+         * modify usb address here to use attached device.
+         * see usbhsh_device_attach()
          */
         if (usbhsh_is_request_address(urb)) {
-                /* FIXME */
-                req.wValue = 1;
+                struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
+                struct usbhsh_device *udev = usbhsh_usbv_to_udev(usbv);
+
+                /* udev is a attached device */
+                req.wValue = usbhsh_device_number(hpriv, udev);
                 dev_dbg(dev, "create new address - %d\n", req.wValue);
         }
 
@@ -595,82 +797,80 @@ static void usbhsh_setup_stage_packet_push(struct usbhsh_hpriv *hpriv,
 static void usbhsh_data_stage_packet_done(struct usbhs_priv *priv,
                                           struct usbhs_pkt *pkt)
 {
-        struct usbhsh_request *ureq = usbhsh_pkt_to_req(pkt);
+        struct usbhsh_request *ureq = usbhsh_pkt_to_ureq(pkt);
         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
-        struct urb *urb = ureq->urb;
 
         /* this ureq was connected to urb when usbhsh_urb_enqueue()  */
 
-        usbhsh_req_free(hpriv, ureq);
-        usbhsh_urb_to_ureq(urb) = NULL;
+        usbhsh_ureq_free(hpriv, ureq);
 }
 
-static void usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
-                                          struct urb *urb,
-                                          struct usbhs_pipe *pipe)
+static int usbhsh_data_stage_packet_push(struct usbhsh_hpriv *hpriv,
+                                         struct urb *urb,
+                                         struct usbhs_pipe *pipe,
+                                         gfp_t mem_flags)
+
 {
         struct usbhsh_request *ureq;
-        struct usbhs_pkt *pkt;
 
-        /*
-         * FIXME
-         *
-         * data stage uses ureq which is connected to urb
-         * see usbhsh_urb_enqueue() :: alloc new request.
-         * it will be freed in usbhsh_data_stage_packet_done()
-         */
-        ureq    = usbhsh_urb_to_ureq(urb);
-        pkt     = &ureq->pkt;
+        /* this ureq will be freed on usbhsh_data_stage_packet_done() */
+        ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
+        if (unlikely(!ureq))
+                return -ENOMEM;
 
         if (usb_pipein(urb->pipe))
                 pipe->handler = &usbhs_dcp_data_stage_in_handler;
         else
                 pipe->handler = &usbhs_dcp_data_stage_out_handler;
 
-        usbhs_pkt_push(pipe, pkt,
+        usbhs_pkt_push(pipe, &ureq->pkt,
                        usbhsh_data_stage_packet_done,
                        urb->transfer_buffer,
                        urb->transfer_buffer_length,
-                       (urb->transfer_flags & URB_ZERO_PACKET));
+                       (urb->transfer_flags & URB_ZERO_PACKET),
+                       -1);
+
+        return 0;
 }
 
 /*
  *              DCP status stage
  */
-static void usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
+static int usbhsh_status_stage_packet_push(struct usbhsh_hpriv *hpriv,
                                             struct urb *urb,
-                                            struct usbhs_pipe *pipe)
+                                            struct usbhs_pipe *pipe,
+                                            gfp_t mem_flags)
 {
         struct usbhsh_request *ureq;
-        struct usbhs_pkt *pkt;
 
-        /*
-         * FIXME
-         *
-         * status stage uses allocated ureq.
-         * it will be freed on usbhsh_queue_done()
-         */
-        ureq    = usbhsh_req_alloc(hpriv, urb, GFP_KERNEL);
-        pkt     = &ureq->pkt;
+        /* This ureq will be freed on usbhsh_queue_done() */
+        ureq = usbhsh_ureq_alloc(hpriv, urb, mem_flags);
+        if (unlikely(!ureq))
+                return -ENOMEM;
 
         if (usb_pipein(urb->pipe))
                 pipe->handler = &usbhs_dcp_status_stage_in_handler;
         else
                 pipe->handler = &usbhs_dcp_status_stage_out_handler;
 
-        usbhs_pkt_push(pipe, pkt,
+        usbhs_pkt_push(pipe, &ureq->pkt,
                        usbhsh_queue_done,
                        NULL,
                        urb->transfer_buffer_length,
-                       0);
+                       0, -1);
+
+        return 0;
 }
 
 static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
-                                 struct usbhsh_hpriv *hpriv,
-                                 struct usbhs_pipe *pipe,
-                                 struct urb *urb)
+                                 struct urb *urb,
+                                 gfp_t mflags)
 {
+        struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
+        struct usbhsh_ep *uep = usbhsh_ep_to_uep(urb->ep);
+        struct usbhs_pipe *pipe = usbhsh_uep_to_pipe(uep);
         struct device *dev = usbhsh_hcd_to_dev(hcd);
+        int ret;
 
         dev_dbg(dev, "%s\n", __func__);
 
@@ -686,13 +886,22 @@ static int usbhsh_dcp_queue_push(struct usb_hcd *hcd,
          *
          * It is pushed only when urb has buffer.
          */
-        if (urb->transfer_buffer_length)
-                usbhsh_data_stage_packet_push(hpriv, urb, pipe);
+        if (urb->transfer_buffer_length) {
+                ret = usbhsh_data_stage_packet_push(hpriv, urb, pipe, mflags);
+                if (ret < 0) {
+                        dev_err(dev, "data stage failed\n");
+                        return ret;
+                }
+        }
 
         /*
          * status stage
          */
-        usbhsh_status_stage_packet_push(hpriv, urb, pipe);
+        ret = usbhsh_status_stage_packet_push(hpriv, urb, pipe, mflags);
+        if (ret < 0) {
+                dev_err(dev, "status stage failed\n");
+                return ret;
+        }
 
         /*
          * start pushed packets
@@ -729,71 +938,82 @@ static int usbhsh_urb_enqueue(struct usb_hcd *hcd,
         struct usbhsh_hpriv *hpriv = usbhsh_hcd_to_hpriv(hcd);
         struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
         struct device *dev = usbhs_priv_to_dev(priv);
-        struct usb_device *usbv = usbhsh_urb_to_usbv(urb);
         struct usb_host_endpoint *ep = urb->ep;
-        struct usbhsh_request *ureq;
-        struct usbhsh_device *udev, *new_udev = NULL;
-        struct usbhs_pipe *pipe;
-        struct usbhsh_ep *uep;
+        struct usbhsh_device *new_udev = NULL;
         int is_dir_in = usb_pipein(urb->pipe);
-
+        int i;
         int ret;
 
         dev_dbg(dev, "%s (%s)\n", __func__, is_dir_in ? "in" : "out");
 
+        if (!usbhsh_is_running(hpriv)) {
+                ret = -EIO;
+                dev_err(dev, "host is not running\n");
+                goto usbhsh_urb_enqueue_error_not_linked;
+        }
+
         ret = usb_hcd_link_urb_to_ep(hcd, urb);
-        if (ret)
+        if (ret) {
+                dev_err(dev, "urb link failed\n");
                 goto usbhsh_urb_enqueue_error_not_linked;
+        }
 
         /*
-         * get udev
+         * attach udev if needed
+         * see [image of mod_host]
          */
-        udev = usbhsh_usbv_to_udev(usbv);
-        if (!udev) {
-                new_udev = usbhsh_device_alloc(hpriv, urb);
-                if (!new_udev)
+        if (!usbhsh_device_get(hpriv, urb)) {
+                new_udev = usbhsh_device_attach(hpriv, urb);
+                if (!new_udev) {
+                        ret = -EIO;
+                        dev_err(dev, "device attach failed\n");
                         goto usbhsh_urb_enqueue_error_not_linked;
-
-                udev = new_udev;
+                }
         }
 
         /*
-         * get uep
+         * attach endpoint if needed
+         * see [image of mod_host]
          */
-        uep = usbhsh_ep_to_uep(ep);
-        if (!uep) {
-                uep = usbhsh_endpoint_alloc(hpriv, udev, ep,
-                                            is_dir_in, mem_flags);
-                if (!uep)
+        if (!usbhsh_ep_to_uep(ep)) {
+                ret = usbhsh_endpoint_attach(hpriv, urb, mem_flags);
+                if (ret < 0) {
+                        dev_err(dev, "endpoint attach failed\n");
                         goto usbhsh_urb_enqueue_error_free_device;
+                }
         }
-        pipe = usbhsh_uep_to_pipe(uep);
 
         /*
-         * alloc new request
+         * attach pipe to endpoint
+         * see [image of mod_host]
          */
-        ureq = usbhsh_req_alloc(hpriv, urb, mem_flags);
-        if (unlikely(!ureq)) {
-                ret = -ENOMEM;
+        for (i = 0; i < 1024; i++) {
+                ret = usbhsh_pipe_attach(hpriv, urb);
+                if (ret < 0)
+                        msleep(100);
+                else
+                        break;
+        }
+        if (ret < 0) {
+                dev_err(dev, "pipe attach failed\n");
                 goto usbhsh_urb_enqueue_error_free_endpoint;
         }
-        usbhsh_urb_to_ureq(urb) = ureq;
 
         /*
          * push packet
          */
         if (usb_pipecontrol(urb->pipe))
-                usbhsh_dcp_queue_push(hcd, hpriv, pipe, urb);
+                ret = usbhsh_dcp_queue_push(hcd, urb, mem_flags);
         else
-                usbhsh_queue_push(hcd, pipe, urb);
+                ret = usbhsh_queue_push(hcd, urb, mem_flags);
 
-        return 0;
+        return ret;
 
 usbhsh_urb_enqueue_error_free_endpoint:
-        usbhsh_endpoint_free(hpriv, ep);
+        usbhsh_endpoint_detach(hpriv, ep);
 usbhsh_urb_enqueue_error_free_device:
         if (new_udev)
-                usbhsh_device_free(hpriv, new_udev);
+                usbhsh_device_detach(hpriv, new_udev);
 usbhsh_urb_enqueue_error_not_linked:
 
         dev_dbg(dev, "%s error\n", __func__);
@@ -807,8 +1027,11 @@ static int usbhsh_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
         struct usbhsh_request *ureq = usbhsh_urb_to_ureq(urb);
 
         if (ureq) {
-                usbhsh_req_free(hpriv, ureq);
-                usbhsh_urb_to_ureq(urb) = NULL;
+                struct usbhs_priv *priv = usbhsh_hpriv_to_priv(hpriv);
+                struct usbhs_pkt *pkt = &ureq->pkt;
+
+                usbhs_pkt_pop(pkt->pipe, pkt);
+                usbhsh_queue_done(priv, pkt);
         }
 
         return 0;
@@ -823,7 +1046,7 @@ static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
 
         /*
          * this function might be called manytimes by same hcd/ep
-         * in-endpoitn == out-endpoint if ep == dcp.
+         * in-endpoint == out-endpoint if ep == dcp.
          */
         if (!uep)
                 return;
@@ -831,15 +1054,14 @@ static void usbhsh_endpoint_disable(struct usb_hcd *hcd,
         udev    = usbhsh_uep_to_udev(uep);
         hpriv   = usbhsh_hcd_to_hpriv(hcd);
 
-        usbhsh_endpoint_free(hpriv, ep);
-        ep->hcpriv = NULL;
+        usbhsh_endpoint_detach(hpriv, ep);
 
         /*
          * if there is no endpoint,
          * free device
          */
         if (!usbhsh_device_has_endpoint(udev))
-                usbhsh_device_free(hpriv, udev);
+                usbhsh_device_detach(hpriv, udev);
 }
 
 static int usbhsh_hub_status_data(struct usb_hcd *hcd, char *buf)
@@ -919,6 +1141,8 @@ static int __usbhsh_hub_port_feature(struct usbhsh_hpriv *hpriv,
                                        USB_PORT_STAT_HIGH_SPEED |
                                        USB_PORT_STAT_LOW_SPEED);
 
+                usbhsh_queue_force_pop_all(priv);
+
                 usbhs_bus_send_reset(priv);
                 msleep(20);
                 usbhs_bus_send_sof_enable(priv);
@@ -1082,6 +1306,20 @@ static int usbhsh_irq_attch(struct usbhs_priv *priv,
         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_CONNECTION);
         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
 
+        /*
+         * attch interrupt might happen infinitely on some device
+         * (on self power USB hub ?)
+         * disable it here.
+         *
+         * usbhsh_is_running() becomes effective
+         * according to this process.
+         * see
+         *      usbhsh_is_running()
+         *      usbhsh_urb_enqueue()
+         */
+        hpriv->mod.irq_attch = NULL;
+        usbhs_irq_callback_update(priv, &hpriv->mod);
+
         return 0;
 }
 
@@ -1096,6 +1334,24 @@ static int usbhsh_irq_dtch(struct usbhs_priv *priv,
         usbhsh_port_stat_clear(hpriv, USB_PORT_STAT_CONNECTION);
         usbhsh_port_stat_set(hpriv, USB_PORT_STAT_C_CONNECTION << 16);
 
+        /*
+         * enable attch interrupt again
+         *
+         * usbhsh_is_running() becomes invalid
+         * according to this process.
+         * see
+         *      usbhsh_is_running()
+         *      usbhsh_urb_enqueue()
+         */
+        hpriv->mod.irq_attch = usbhsh_irq_attch;
+        usbhs_irq_callback_update(priv, &hpriv->mod);
+
+        /*
+         * usbhsh_queue_force_pop_all() should be called
+         * after usbhsh_is_running() becomes invalid.
+         */
+        usbhsh_queue_force_pop_all(priv);
+
         return 0;
 }
 
@@ -1131,7 +1387,6 @@ static int usbhsh_irq_setup_err(struct usbhs_priv *priv,
 static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
 {
         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
-        struct usbhsh_pipe_info *pipe_info = hpriv->pipe_info;
         struct usbhs_pipe *pipe;
         u32 *pipe_type = usbhs_get_dparam(priv, pipe_type);
         int pipe_size = usbhs_get_dparam(priv, pipe_size);
@@ -1140,7 +1395,6 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
         /* init all pipe */
         old_type = USB_ENDPOINT_XFER_CONTROL;
         for (i = 0; i < pipe_size; i++) {
-                pipe_info[i].usr_cnt    = 0;
 
                 /*
                  * data "output" will be finished as soon as possible,
@@ -1174,7 +1428,7 @@ static void usbhsh_pipe_init_for_host(struct usbhs_priv *priv)
                                                  dir_in);
                 }
 
-                pipe->mod_private = pipe_info + i;
+                pipe->mod_private = NULL;
         }
 }
 
@@ -1205,9 +1459,7 @@ static int usbhsh_start(struct usbhs_priv *priv)
          * - host
          * - usb module
          */
-        usbhs_sys_hispeed_ctrl(priv, 1);
         usbhs_sys_host_ctrl(priv, 1);
-        usbhs_sys_usb_ctrl(priv, 1);
 
         /*
          * enable irq callback
@@ -1242,9 +1494,7 @@ static int usbhsh_stop(struct usbhs_priv *priv)
         usb_remove_hcd(hcd);
 
         /* disable sys */
-        usbhs_sys_hispeed_ctrl(priv, 0);
         usbhs_sys_host_ctrl(priv, 0);
-        usbhs_sys_usb_ctrl(priv, 0);
 
         dev_dbg(dev, "quit host\n");
 
@@ -1255,10 +1505,8 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
 {
         struct usbhsh_hpriv *hpriv;
         struct usb_hcd *hcd;
-        struct usbhsh_pipe_info *pipe_info;
         struct usbhsh_device *udev;
         struct device *dev = usbhs_priv_to_dev(priv);
-        int pipe_size = usbhs_get_dparam(priv, pipe_size);
         int i;
 
         /* initialize hcd */
@@ -1269,12 +1517,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
         }
         hcd->has_tt = 1; /* for low/full speed */
 
-        pipe_info = kzalloc(sizeof(*pipe_info) * pipe_size, GFP_KERNEL);
-        if (!pipe_info) {
-                dev_err(dev, "Could not allocate pipe_info\n");
-                goto usbhs_mod_host_probe_err;
-        }
-
         /*
          * CAUTION
          *
@@ -1294,9 +1536,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
         hpriv->mod.name         = "host";
         hpriv->mod.start        = usbhsh_start;
         hpriv->mod.stop         = usbhsh_stop;
-        hpriv->pipe_info        = pipe_info;
-        hpriv->pipe_size        = pipe_size;
-        usbhsh_req_list_init(hpriv);
         usbhsh_port_stat_init(hpriv);
 
         /* init all device */
@@ -1308,11 +1547,6 @@ int usbhs_mod_host_probe(struct usbhs_priv *priv)
         dev_info(dev, "host probed\n");
 
         return 0;
-
-usbhs_mod_host_probe_err:
-        usb_put_hcd(hcd);
-
-        return -ENOMEM;
 }
 
 int usbhs_mod_host_remove(struct usbhs_priv *priv)
@@ -1320,8 +1554,6 @@ int usbhs_mod_host_remove(struct usbhs_priv *priv)
         struct usbhsh_hpriv *hpriv = usbhsh_priv_to_hpriv(priv);
         struct usb_hcd *hcd = usbhsh_hpriv_to_hcd(hpriv);
 
-        usbhsh_req_list_quit(hpriv);
-
         usb_put_hcd(hcd);
 
         return 0;
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c
index c74389ce217..feb06d6d281 100644
--- a/drivers/usb/renesas_usbhs/pipe.c
+++ b/drivers/usb/renesas_usbhs/pipe.c
@@ -257,6 +257,13 @@ void usbhs_pipe_stall(struct usbhs_pipe *pipe)
         }
 }
 
+int usbhs_pipe_is_stall(struct usbhs_pipe *pipe)
+{
+        u16 pid = usbhsp_pipectrl_get(pipe) & PID_MASK;
+
+        return (int)(pid == PID_STALL10 || pid == PID_STALL11);
+}
+
 /*
  *              pipe setup
  */
@@ -323,8 +330,7 @@ static u16 usbhsp_setup_pipecfg(struct usbhs_pipe *pipe,
         if (dir_in)
                 usbhsp_flags_set(pipe, IS_DIR_HOST);
 
-        if ((is_host  && !dir_in) ||
-            (!is_host && dir_in))
+        if (!!is_host ^ !!dir_in)
                 dir |= DIR_OUT;
 
         if (!dir)
@@ -471,10 +477,27 @@ int usbhs_pipe_is_dir_host(struct usbhs_pipe *pipe)
         return usbhsp_flags_has(pipe, IS_DIR_HOST);
 }
 
-void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int data)
+void usbhs_pipe_data_sequence(struct usbhs_pipe *pipe, int sequence)
 {
         u16 mask = (SQCLR | SQSET);
-        u16 val = (data) ? SQSET : SQCLR;
+        u16 val;
+
+        /*
+         * sequence
+         *  0  : data0
+         *  1  : data1
+         *  -1 : no change
+         */
+        switch (sequence) {
+        case 0:
+                val = SQCLR;
+                break;
+        case 1:
+                val = SQSET;
+                break;
+        default:
+                return;
+        }
 
         usbhsp_pipectrl_set(pipe, mask, val);
 }
diff --git a/drivers/usb/renesas_usbhs/pipe.h b/drivers/usb/renesas_usbhs/pipe.h
index 6334fc644cc..fa18b7dc2b2 100644
--- a/drivers/usb/renesas_usbhs/pipe.h
+++ b/drivers/usb/renesas_usbhs/pipe.h
@@ -87,6 +87,7 @@ int usbhs_pipe_is_accessible(struct usbhs_pipe *pipe);
 void usbhs_pipe_enable(struct usbhs_pipe *pipe);
 void usbhs_pipe_disable(struct usbhs_pipe *pipe);
 void usbhs_pipe_stall(struct usbhs_pipe *pipe);
+int usbhs_pipe_is_stall(struct usbhs_pipe *pipe);
 void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo);
 void usbhs_pipe_config_update(struct usbhs_pipe *pipe, u16 devsel,
                               u16 epnum, u16 maxp);
diff --git a/drivers/usb/serial/ChangeLog.history b/drivers/usb/serial/ChangeLog.history
deleted file mode 100644
index f13fd488ebe..00000000000
--- a/drivers/usb/serial/ChangeLog.history
+++ /dev/null
@@ -1,730 +0,0 @@
-This is the contents of some of the drivers/usb/serial/ files that had  old
-changelog comments.  They were quite old, and out of date, and we don't keep
-them anymore, so I've put them here, away from the source files, in case
-people still care to see them.
-
-- Greg Kroah-Hartman <greg@kroah.com> October 20, 2005
-
------------------------------------------------------------------------
-usb-serial.h Change Log comments:
-
- (03/26/2002) gkh
-        removed the port->tty check from port_paranoia_check() due to serial
-        consoles not having a tty device assigned to them.
-
- (12/03/2001) gkh
-        removed active from the port structure.
-        added documentation to the usb_serial_device_type structure
-
- (10/10/2001) gkh
-        added vendor and product to serial structure.  Needed to determine device
-        owner when the device is disconnected.
-
- (05/30/2001) gkh
-        added sem to port structure and removed port_lock
-
- (10/05/2000) gkh
-        Added interrupt_in_endpointAddress and bulk_in_endpointAddress to help
-        fix bug with urb->dev not being set properly, now that the usb core
-        needs it.
-
- (09/11/2000) gkh
-        Added usb_serial_debug_data function to help get rid of #DEBUG in the
-        drivers.
-
- (08/28/2000) gkh
-        Added port_lock to port structure.
-
- (08/08/2000) gkh
-        Added open_count to port structure.
-
- (07/23/2000) gkh
-        Added bulk_out_endpointAddress to port structure.
-
- (07/19/2000) gkh, pberger, and borchers
-        Modifications to allow usb-serial drivers to be modules.
-
------------------------------------------------------------------------
-usb-serial.c Change Log comments:
-
- (12/10/2002) gkh
-        Split the ports off into their own struct device, and added a
-        usb-serial bus driver.
-
- (11/19/2002) gkh
-        removed a few #ifdefs for the generic code and cleaned up the failure
-        logic in initialization.
-
- (10/02/2002) gkh
-        moved the console code to console.c and out of this file.
-
- (06/05/2002) gkh
-        moved location of startup() call in serial_probe() until after all
-        of the port information and endpoints are initialized.  This makes
-        things easier for some drivers.
-
- (04/10/2002) gkh
-        added serial_read_proc function which creates a
-        /proc/tty/driver/usb-serial file.
-
- (03/27/2002) gkh
-        Got USB serial console code working properly and merged into the main
-        version of the tree.  Thanks to Randy Dunlap for the initial version
-        of this code, and for pushing me to finish it up.
-        The USB serial console works with any usb serial driver device.
-
- (03/21/2002) gkh
-        Moved all manipulation of port->open_count into the core.  Now the
-        individual driver's open and close functions are called only when the
-        first open() and last close() is called.  Making the drivers a bit
-        smaller and simpler.
-        Fixed a bug if a driver didn't have the owner field set.
-
- (02/26/2002) gkh
-        Moved all locking into the main serial_* functions, instead of having
-        the individual drivers have to grab the port semaphore.  This should
-        reduce races.
-        Reworked the MOD_INC logic a bit to always increment and decrement, even
-        if the generic driver is being used.
-
- (10/10/2001) gkh
-        usb_serial_disconnect() now sets the serial->dev pointer is to NULL to
-        help prevent child drivers from accessing the device since it is now
-        gone.
-
- (09/13/2001) gkh
-        Moved generic driver initialize after we have registered with the USB
-        core.  Thanks to Randy Dunlap for pointing this problem out.
-
- (07/03/2001) gkh
-        Fixed module paramater size.  Thanks to John Brockmeyer for the pointer.
-        Fixed vendor and product getting defined through the MODULE_PARM macro
-        if the Generic driver wasn't compiled in.
-        Fixed problem with generic_shutdown() not being called for drivers that
-        don't have a shutdown() function.
-
- (06/06/2001) gkh
-        added evil hack that is needed for the prolific pl2303 device due to the
-        crazy way its endpoints are set up.
-
- (05/30/2001) gkh
-        switched from using spinlock to a semaphore, which fixes lots of problems.
-
- (04/08/2001) gb
-        Identify version on module load.
-
- 2001_02_05 gkh
-        Fixed buffer overflows bug with the generic serial driver.  Thanks to
-        Todd Squires <squirest@ct0.com> for fixing this.
-
- (01/10/2001) gkh
-        Fixed bug where the generic serial adaptor grabbed _any_ device that was
-        offered to it.
-
- (12/12/2000) gkh
-        Removed MOD_INC and MOD_DEC from poll and disconnect functions, and
-        moved them to the serial_open and serial_close functions.
-        Also fixed bug with there not being a MOD_DEC for the generic driver
-        (thanks to Gary Brubaker for finding this.)
-
- (11/29/2000) gkh
-        Small NULL pointer initialization cleanup which saves a bit of disk image
-
- (11/01/2000) Adam J. Richter
-        instead of using idVendor/idProduct pairs, usb serial drivers
-        now identify their hardware interest with usb_device_id tables,
-        which they usually have anyhow for use with MODULE_DEVICE_TABLE.
-
- (10/05/2000) gkh
-        Fixed bug with urb->dev not being set properly, now that the usb
-        core needs it.
-
- (09/11/2000) gkh
-        Removed DEBUG #ifdefs with call to usb_serial_debug_data
-
- (08/28/2000) gkh
-        Added port_lock to port structure.
-        Added locks for SMP safeness to generic driver
-        Fixed the ability to open a generic device's port more than once.
-
- (07/23/2000) gkh
-        Added bulk_out_endpointAddress to port structure.
-
- (07/19/2000) gkh, pberger, and borchers
-        Modifications to allow usb-serial drivers to be modules.
-
- (07/03/2000) gkh
-        Added more debugging to serial_ioctl call
-
- (06/25/2000) gkh
-        Changed generic_write_bulk_callback to not call wake_up_interruptible
-        directly, but to have port_softint do it at a safer time.
-
- (06/23/2000) gkh
-        Cleaned up debugging statements in a quest to find UHCI timeout bug.
-
- (05/22/2000) gkh
-        Changed the makefile, enabling the big CONFIG_USB_SERIAL_SOMTHING to be
-        removed from the individual device source files.
-
- (05/03/2000) gkh
-        Added the Digi Acceleport driver from Al Borchers and Peter Berger.
-
- (05/02/2000) gkh
-        Changed devfs and tty register code to work properly now. This was based on
-        the ACM driver changes by Vojtech Pavlik.
-
- (04/27/2000) Ryan VanderBijl
-        Put calls to *_paranoia_checks into one function.
-
- (04/23/2000) gkh
-        Fixed bug that Randy Dunlap found for Generic devices with no bulk out ports.
-        Moved when the startup code printed out the devices that are supported.
-
- (04/19/2000) gkh
-        Added driver for ZyXEL omni.net lcd plus ISDN TA
-        Made startup info message specify which drivers were compiled in.
-
- (04/03/2000) gkh
-        Changed the probe process to remove the module unload races.
-        Changed where the tty layer gets initialized to have devfs work nicer.
-        Added initial devfs support.
-
- (03/26/2000) gkh
-        Split driver up into device specific pieces.
-
- (03/19/2000) gkh
-        Fixed oops that could happen when device was removed while a program
-        was talking to the device.
-        Removed the static urbs and now all urbs are created and destroyed
-        dynamically.
-        Reworked the internal interface. Now everything is based on the
-        usb_serial_port structure instead of the larger usb_serial structure.
-        This fixes the bug that a multiport device could not have more than
-        one port open at one time.
-
- (03/17/2000) gkh
-        Added config option for debugging messages.
-        Added patch for keyspan pda from Brian Warner.
-
- (03/06/2000) gkh
-        Added the keyspan pda code from Brian Warner <warner@lothar.com>
-        Moved a bunch of the port specific stuff into its own structure. This
-        is in anticipation of the true multiport devices (there's a bug if you
-        try to access more than one port of any multiport device right now)
-
- (02/21/2000) gkh
-        Made it so that any serial devices only have to specify which functions
-        they want to overload from the generic function calls (great,
-        inheritance in C, in a driver, just what I wanted...)
-        Added support for set_termios and ioctl function calls. No drivers take
-        advantage of this yet.
-        Removed the #ifdef MODULE, now there is no module specific code.
-        Cleaned up a few comments in usb-serial.h that were wrong (thanks again
-        to Miles Lott).
-        Small fix to get_free_serial.
-
- (02/14/2000) gkh
-        Removed the Belkin and Peracom functionality from the driver due to
-        the lack of support from the vendor, and me not wanting people to
-        accidenatly buy the device, expecting it to work with Linux.
-        Added read_bulk_callback and write_bulk_callback to the type structure
-        for the needs of the FTDI and WhiteHEAT driver.
-        Changed all reverences to FTDI to FTDI_SIO at the request of Bill
-        Ryder.
-        Changed the output urb size back to the max endpoint size to make
-        the ftdi_sio driver have it easier, and due to the fact that it didn't
-        really increase the speed any.
-
- (02/11/2000) gkh
-        Added VISOR_FUNCTION_CONSOLE to the visor startup function. This was a
-        patch from Miles Lott (milos@insync.net).
-        Fixed bug with not restoring the minor range that a device grabs, if
-        the startup function fails (thanks Miles for finding this).
-
- (02/05/2000) gkh
-        Added initial framework for the Keyspan PDA serial converter so that
-        Brian Warner has a place to put his code.
-        Made the ezusb specific functions generic enough that different
-        devices can use them (whiteheat and keyspan_pda both need them).
-        Split out a whole bunch of structure and other stuff to a separate
-        usb-serial.h file.
-        Made the Visor connection messages a little more understandable, now
-        that Miles Lott (milos@insync.net) has gotten the Generic channel to
-        work. Also made them always show up in the log file.
-
- (01/25/2000) gkh
-        Added initial framework for FTDI serial converter so that Bill Ryder
-        has a place to put his code.
-        Added the vendor specific info from Handspring. Now we can print out
-        informational debug messages as well as understand what is happening.
-
- (01/23/2000) gkh
-        Fixed problem of crash when trying to open a port that didn't have a
-        device assigned to it. Made the minor node finding a little smarter,
-        now it looks to find a continuous space for the new device.
-
- (01/21/2000) gkh
-        Fixed bug in visor_startup with patch from Miles Lott (milos@insync.net)
-        Fixed get_serial_by_minor which was all messed up for multi port
-        devices. Fixed multi port problem for generic devices. Now the number
-        of ports is determined by the number of bulk out endpoints for the
-        generic device.
-
- (01/19/2000) gkh
-        Removed lots of cruft that was around from the old (pre urb) driver
-        interface.
-        Made the serial_table dynamic. This should save lots of memory when
-        the number of minor nodes goes up to 256.
-        Added initial support for devices that have more than one port.
-        Added more debugging comments for the Visor, and added a needed
-        set_configuration call.
-
- (01/17/2000) gkh
-        Fixed the WhiteHEAT firmware (my processing tool had a bug)
-        and added new debug loader firmware for it.
-        Removed the put_char function as it isn't really needed.
-        Added visor startup commands as found by the Win98 dump.
-
- (01/13/2000) gkh
-        Fixed the vendor id for the generic driver to the one I meant it to be.
-
- (01/12/2000) gkh
-        Forget the version numbering...that's pretty useless...
-        Made the driver able to be compiled so that the user can select which
-        converter they want to use. This allows people who only want the Visor
-        support to not pay the memory size price of the WhiteHEAT.
-        Fixed bug where the generic driver (idVendor=0000 and idProduct=0000)
-        grabbed the root hub. Not good.
-
- version 0.4.0 (01/10/2000) gkh
-        Added whiteheat.h containing the firmware for the ConnectTech WhiteHEAT
-        device. Added startup function to allow firmware to be downloaded to
-        a device if it needs to be.
-        Added firmware download logic to the WhiteHEAT device.
-        Started to add #defines to split up the different drivers for potential
-        configuration option.
-
- version 0.3.1 (12/30/99) gkh
-      Fixed problems with urb for bulk out.
-      Added initial support for multiple sets of endpoints. This enables
-      the Handspring Visor to be attached successfully. Only the first
-      bulk in / bulk out endpoint pair is being used right now.
-
- version 0.3.0 (12/27/99) gkh
-        Added initial support for the Handspring Visor based on a patch from
-        Miles Lott (milos@sneety.insync.net)
-        Cleaned up the code a bunch and converted over to using urbs only.
-
- version 0.2.3 (12/21/99) gkh
-        Added initial support for the Connect Tech WhiteHEAT converter.
-        Incremented the number of ports in expectation of getting the
-        WhiteHEAT to work properly (4 ports per connection).
-        Added notification on insertion and removal of what port the
-        device is/was connected to (and what kind of device it was).
-
- version 0.2.2 (12/16/99) gkh
-        Changed major number to the new allocated number. We're legal now!
-
- version 0.2.1 (12/14/99) gkh
-        Fixed bug that happens when device node is opened when there isn't a
-        device attached to it. Thanks to marek@webdesign.no for noticing this.
-
- version 0.2.0 (11/10/99) gkh
-        Split up internals to make it easier to add different types of serial
-        converters to the code.
-        Added a "generic" driver that gets it's vendor and product id
-        from when the module is loaded. Thanks to David E. Nelson (dnelson@jump.net)
-        for the idea and sample code (from the usb scanner driver.)
-        Cleared up any licensing questions by releasing it under the GNU GPL.
-
- version 0.1.2 (10/25/99) gkh
-        Fixed bug in detecting device.
-
- version 0.1.1 (10/05/99) gkh
-        Changed the major number to not conflict with anything else.
-
- version 0.1 (09/28/99) gkh
-        Can recognize the two different devices and start up a read from
-        device when asked to. Writes also work. No control signals yet, this
-        all is vendor specific data (i.e. no spec), also no control for
-        different baud rates or other bit settings.
-        Currently we are using the same devid as the acm driver. This needs
-        to change.
-
------------------------------------------------------------------------
-visor.c Change Log comments:
-
- (06/03/2003) Judd Montgomery <judd at jpilot.org>
-     Added support for module parameter options for untested/unknown
-     devices.
-
- (03/09/2003) gkh
-        Added support for the Sony Clie NZ90V device.  Thanks to Martin Brachtl
-        <brachtl@redgrep.cz> for the information.
-
- (03/05/2003) gkh
-        Think Treo support is now working.
-
- (04/03/2002) gkh
-        Added support for the Sony OS 4.1 devices.  Thanks to Hiroyuki ARAKI
-        <hiro@zob.ne.jp> for the information.
-
- (03/27/2002) gkh
-        Removed assumptions that port->tty was always valid (is not true
-        for usb serial console devices.)
-
- (03/23/2002) gkh
-        Added support for the Palm i705 device, thanks to Thomas Riemer
-        <tom@netmech.com> for the information.
-
- (03/21/2002) gkh
-        Added support for the Palm m130 device, thanks to Udo Eisenbarth
-        <udo.eisenbarth@web.de> for the information.
-
- (02/27/2002) gkh
-        Reworked the urb handling logic.  We have no more pool, but dynamically
-        allocate the urb and the transfer buffer on the fly.  In testing this
-        does not incure any measurable overhead.  This also relies on the fact
-        that we have proper reference counting logic for urbs.
-
- (02/21/2002) SilaS
-  Added initial support for the Palm m515 devices.
-
- (02/14/2002) gkh
-        Added support for the Clie S-360 device.
-
- (12/18/2001) gkh
-        Added better Clie support for 3.5 devices.  Thanks to Geoffrey Levand
-        for the patch.
-
- (11/11/2001) gkh
-        Added support for the m125 devices, and added check to prevent oopses
-        for Clié devices that lie about the number of ports they have.
-
- (08/30/2001) gkh
-        Added support for the Clie devices, both the 3.5 and 4.0 os versions.
-        Many thanks to Daniel Burke, and Bryan Payne for helping with this.
-
- (08/23/2001) gkh
-        fixed a few potential bugs pointed out by Oliver Neukum.
-
- (05/30/2001) gkh
-        switched from using spinlock to a semaphore, which fixes lots of problems.
-
- (05/28/2000) gkh
-        Added initial support for the Palm m500 and Palm m505 devices.
-
- (04/08/2001) gb
-        Identify version on module load.
-
- (01/21/2000) gkh
-        Added write_room and chars_in_buffer, as they were previously using the
-        generic driver versions which is all wrong now that we are using an urb
-        pool.  Thanks to Wolfgang Grandegger for pointing this out to me.
-        Removed count assignment in the write function, which was not needed anymore
-        either.  Thanks to Al Borchers for pointing this out.
-
- (12/12/2000) gkh
-        Moved MOD_DEC to end of visor_close to be nicer, as the final write
-        message can sleep.
-
- (11/12/2000) gkh
-        Fixed bug with data being dropped on the floor by forcing tty->low_latency
-        to be on.  Hopefully this fixes the OHCI issue!
-
- (11/01/2000) Adam J. Richter
-        usb_device_id table support
-
- (10/05/2000) gkh
-        Fixed bug with urb->dev not being set properly, now that the usb
-        core needs it.
-
- (09/11/2000) gkh
-        Got rid of always calling kmalloc for every urb we wrote out to the
-        device.
-        Added visor_read_callback so we can keep track of bytes in and out for
-        those people who like to know the speed of their device.
-        Removed DEBUG #ifdefs with call to usb_serial_debug_data
-
- (09/06/2000) gkh
-        Fixed oops in visor_exit.  Need to uncomment usb_unlink_urb call _after_
-        the host controller drivers set urb->dev = NULL when the urb is finished.
-
- (08/28/2000) gkh
-        Added locks for SMP safeness.
-
- (08/08/2000) gkh
-        Fixed endian problem in visor_startup.
-        Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
-        than once.
-
- (07/23/2000) gkh
-        Added pool of write urbs to speed up transfers to the visor.
-
- (07/19/2000) gkh
-        Added module_init and module_exit functions to handle the fact that this
-        driver is a loadable module now.
-
- (07/03/2000) gkh
-        Added visor_set_ioctl and visor_set_termios functions (they don't do much
-        of anything, but are good for debugging.)
-
- (06/25/2000) gkh
-        Fixed bug in visor_unthrottle that should help with the disconnect in PPP
-        bug that people have been reporting.
-
- (06/23/2000) gkh
-        Cleaned up debugging statements in a quest to find UHCI timeout bug.
-
- (04/27/2000) Ryan VanderBijl
-        Fixed memory leak in visor_close
-
- (03/26/2000) gkh
-        Split driver up into device specific pieces.
-
------------------------------------------------------------------------
-pl2303.c Change Log comments:
-
- 2002_Mar_26 gkh
-        allowed driver to work properly if there is no tty assigned to a port
-        (this happens for serial console devices.)
-
- 2001_Oct_06 gkh
-        Added RTS and DTR line control.  Thanks to joe@bndlg.de for parts of it.
-
- 2001_Sep_19 gkh
-        Added break support.
-
- 2001_Aug_30 gkh
-        fixed oops in write_bulk_callback.
-
- 2001_Aug_28 gkh
-        reworked buffer logic to be like other usb-serial drivers.  Hopefully
-        removing some reported problems.
-
- 2001_Jun_06 gkh
-        finished porting to 2.4 format.
-
-
------------------------------------------------------------------------
-io_edgeport.c Change Log comments:
-
- 2003_04_03 al borchers
-  - fixed a bug (that shows up with dosemu) where the tty struct is
-    used in a callback after it has been freed
-
- 2.3 2002_03_08 greg kroah-hartman
-        - fixed bug when multiple devices were attached at the same time.
-
- 2.2 2001_11_14 greg kroah-hartman
-        - fixed bug in edge_close that kept the port from being used more
-          than once.
-        - fixed memory leak on device removal.
-        - fixed potential double free of memory when command urb submitting
-          failed.
-        - other small cleanups when the device is removed
-
- 2.1 2001_07_09 greg kroah-hartman
-        - added support for TIOCMBIS and TIOCMBIC.
-
-     (04/08/2001) gb
-        - Identify version on module load.
-
- 2.0 2001_03_05 greg kroah-hartman
-        - reworked entire driver to fit properly in with the other usb-serial
-          drivers.  Occasional oopses still happen, but it's a good start.
-
- 1.2.3 (02/23/2001) greg kroah-hartman
-        - changed device table to work properly for 2.4.x final format.
-        - fixed problem with dropping data at high data rates.
-
- 1.2.2 (11/27/2000) greg kroah-hartman
-        - cleaned up more NTisms.
-        - Added device table for 2.4.0-test11
-
- 1.2.1 (11/08/2000) greg kroah-hartman
-        - Started to clean up NTisms.
-        - Fixed problem with dev field of urb for kernels >= 2.4.0-test9
-
- 1.2 (10/17/2000) David Iacovelli
-        Remove all EPIC code and GPL source
-  Fix RELEVANT_IFLAG macro to include flow control
-  changes port configuration changes.
-  Fix redefinition of SERIAL_MAGIC
-  Change all timeout values to 5 seconds
-  Tried to fix the UHCI multiple urb submission, but failed miserably.
-  it seems to work fine with OHCI.
-  ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must
-    find a way to work arount this UHCI bug )
-
- 1.1 (10/11/2000) David Iacovelli
-  Fix XON/XOFF flow control to support both IXON and IXOFF
-
- 0.9.27 (06/30/2000) David Iacovelli
-  Added transmit queue and now allocate urb for command writes.
-
- 0.9.26 (06/29/2000) David Iacovelli
-  Add support for 80251 based edgeport
-
- 0.9.25 (06/27/2000) David Iacovelli
-  Do not close the port if it has multiple opens.
-
- 0.9.24 (05/26/2000) David Iacovelli
-  Add IOCTLs to support RXTX and JAVA POS
-  and first cut at running BlackBox Demo
-
- 0.9.23 (05/24/2000) David Iacovelli
-  Add IOCTLs to support RXTX and JAVA POS
-
- 0.9.22 (05/23/2000) David Iacovelli
-  fixed bug in enumeration.  If epconfig turns on mapping by
-  path after a device is already plugged in, we now update
-  the mapping correctly
-
- 0.9.21 (05/16/2000) David Iacovelli
-  Added BlockUntilChaseResp() to also wait for txcredits
-  Updated the way we allocate and handle write URBs
-        Add debug code to dump buffers
-
- 0.9.20 (05/01/2000) David Iacovelli
-        change driver to use usb/tts/
-
- 0.9.19 (05/01/2000) David Iacovelli
-  Update code to compile if DEBUG is off
-
- 0.9.18 (04/28/2000) David Iacovelli
-  cleanup and test tty_register with devfs
-
- 0.9.17 (04/27/2000) greg kroah-hartman
-        changed tty_register around to be like the way it
-        was before, but now it works properly with devfs.
-
- 0.9.16 (04/26/2000) david iacovelli
-  Fixed bug in GetProductInfo()
-
- 0.9.15 (04/25/2000) david iacovelli
-        Updated enumeration
-
- 0.9.14 (04/24/2000) david iacovelli
-  Removed all config/status IOCTLS and
-  converted to using /proc/edgeport
-  still playing with devfs
-
- 0.9.13 (04/24/2000) david iacovelli
-  Removed configuration based on ttyUSB0
-  Added support for configuration using /prod/edgeport
-  first attempt at using devfs (not working yet!)
-  Added IOCTL to GetProductInfo()
-  Added support for custom baud rates
-        Add support for random port numbers
-
- 0.9.12 (04/18/2000) david iacovelli
-        added additional configuration IOCTLs
-  use ttyUSB0 for configuration
-
- 0.9.11 (04/17/2000) greg kroah-hartman
-        fixed module initialization race conditions.
-        made all urbs dynamically allocated.
-        made driver devfs compatible. now it only registers the tty device
-        when the device is actually plugged in.
-
- 0.9.10 (04/13/2000) greg kroah-hartman
-        added proc interface framework.
-
- 0.9.9 (04/13/2000) david iacovelli
-        added enumeration code and ioctls to configure the device
-
- 0.9.8 (04/12/2000) david iacovelli
-  Change interrupt read start when device is plugged in
-  and stop when device is removed
-        process interrupt reads when all ports are closed
-  (keep value of rxBytesAvail consistent with the edgeport)
-  set the USB_BULK_QUEUE flag so that we can shove a bunch
-  of urbs at once down the pipe
-
- 0.9.7 (04/10/2000) david iacovelli
-        start to add enumeration code.
-  generate serial number for epic devices
-  add support for kdb
-
- 0.9.6 (03/30/2000) david iacovelli
-  add IOCTL to get string, manufacture, and boot descriptors
-
- 0.9.5 (03/14/2000) greg kroah-hartman
-        more error checking added to SerialOpen to try to fix UHCI open problem
-
- 0.9.4 (03/09/2000) greg kroah-hartman
-        added more error checking to handle oops when data is hanging
-        around and tty is abruptly closed.
-
- 0.9.3 (03/09/2000) david iacovelli
-        Add epic support for xon/xoff chars
-        play with performance
-
- 0.9.2 (03/08/2000) greg kroah-hartman
-        changed most "info" calls to "dbg"
-        implemented flow control properly in the termios call
-
- 0.9.1 (03/08/2000) david iacovelli
-        added EPIC support
-        enabled bootloader update
-
- 0.9 (03/08/2000) greg kroah-hartman
-        Release to IO networks.
-        Integrated changes that David made
-  made getting urbs for writing SMP safe
-
- 0.8 (03/07/2000) greg kroah-hartman
-        Release to IO networks.
-        Fixed problems that were seen in code by David.
-  Now both Edgeport/4 and Edgeport/2 works properly.
-  Changed most of the functions to use port instead of serial.
-
- 0.7 (02/27/2000) greg kroah-hartman
-        Milestone 3 release.
-        Release to IO Networks
-        ioctl for waiting on line change implemented.
-        ioctl for getting statistics implemented.
-        multiport support working.
-        lsr and msr registers are now handled properly.
-        change break now hooked up and working.
-        support for all known Edgeport devices.
-
- 0.6 (02/22/2000) greg kroah-hartman
-        Release to IO networks.
-        CHASE is implemented correctly when port is closed.
-        SerialOpen now blocks correctly until port is fully opened.
-
- 0.5 (02/20/2000) greg kroah-hartman
-        Release to IO networks.
-        Known problems:
-                modem status register changes are not sent on to the user
-                CHASE is not implemented when the port is closed.
-
- 0.4 (02/16/2000) greg kroah-hartman
-        Second cut at the CeBit demo.
-        Doesn't leak memory on every write to the port
-        Still small leaks on startup.
-        Added support for Edgeport/2 and Edgeport/8
-
- 0.3 (02/15/2000) greg kroah-hartman
-        CeBit demo release.
-        Force the line settings to 4800, 8, 1, e for the demo.
-        Warning! This version leaks memory like crazy!
-
- 0.2 (01/30/2000) greg kroah-hartman
-        Milestone 1 release.
-        Device is found by USB subsystem, enumerated, firmware is downloaded
-        and the descriptors are printed to the debug log, config is set, and
-        green light starts to blink. Open port works, and data can be sent
-        and received at the default settings of the UART. Loopback connector
-        and debug log confirms this.
-
- 0.1 (01/23/2000) greg kroah-hartman
-        Initial release to help IO Networks try to set up their test system.
-        Edgeport4 is recognized, firmware is downloaded, config is set so
-        device blinks green light every 3 sec. Port is bound, but opening,
-        closing, and sending data do not work properly.
-
-
diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c
index d6921fa1403..f9f29b289f2 100644
--- a/drivers/usb/serial/belkin_sa.c
+++ b/drivers/usb/serial/belkin_sa.c
@@ -20,50 +20,7 @@
  * TODO:
  * -- Add true modem contol line query capability.  Currently we track the
  *    states reported by the interrupt and the states we request.
- * -- Add error reporting back to application for UART error conditions.
- *    Just point me at how to implement this and I'll do it. I've put the
- *    framework in, but haven't analyzed the "tty_flip" interface yet.
  * -- Add support for flush commands
- * -- Add everything that is missing :)
- *
- * 27-Nov-2001 gkh
- *      compressed all the differnent device entries into 1.
- *
- * 30-May-2001 gkh
- *      switched from using spinlock to a semaphore, which fixes lots of
- *      problems.
- *
- * 08-Apr-2001 gb
- *      - Identify version on module load.
- *
- * 12-Mar-2001 gkh
- *      - Added support for the GoHubs GO-COM232 device which is the same as the
- *        Peracom device.
- *
- * 06-Nov-2000 gkh
- *      - Added support for the old Belkin and Peracom devices.
- *      - Made the port able to be opened multiple times.
- *      - Added some defaults incase the line settings are things these devices
- *        can't support.
- *
- * 18-Oct-2000 William Greathouse
- *    Released into the wild (linux-usb-devel)
- *
- * 17-Oct-2000 William Greathouse
- *    Add code to recognize firmware version and set hardware flow control
- *    appropriately.  Belkin states that firmware prior to 3.05 does not
- *    operate correctly in hardware handshake mode.  I have verified this
- *    on firmware 2.05 -- for both RTS and DTR input flow control, the control
- *    line is not reset.  The test performed by the Belkin Win* driver is
- *    to enable hardware flow control for firmware 2.06 or greater and
- *    for 1.00 or prior.  I am only enabling for 2.06 or greater.
- *
- * 12-Oct-2000 William Greathouse
- *    First cut at supporting Belkin USB Serial Adapter F5U103
- *    I did not have a copy of the original work to support this
- *    adapter, so pardon any stupid mistakes.  All of the information
- *    I am using to write this driver was acquired by using a modified
- *    UsbSnoop on Windows2000 and from examining the other USB drivers.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index 6ae1c0688b5..0e77511060c 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -335,13 +335,12 @@ static int ch341_open(struct tty_struct *tty, struct usb_serial_port *port)
                 goto out;
 
         dbg("%s - submitting interrupt urb", __func__);
-        port->interrupt_in_urb->dev = serial->dev;
         r = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (r) {
                 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
                         " error %d\n", __func__, r);
                 ch341_close(port);
-                return -EPROTO;
+                goto out;
         }
 
         r = usb_serial_generic_open(tty, port);
diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
index fd67cc53545..adfe660ed00 100644
--- a/drivers/usb/serial/cp210x.c
+++ b/drivers/usb/serial/cp210x.c
@@ -92,6 +92,7 @@ static const struct usb_device_id id_table[] = {
         { USB_DEVICE(0x10C4, 0x818B) }, /* AVIT Research USB to TTL */
         { USB_DEVICE(0x10C4, 0x819F) }, /* MJS USB Toslink Switcher */
         { USB_DEVICE(0x10C4, 0x81A6) }, /* ThinkOptics WavIt */
+        { USB_DEVICE(0x10C4, 0x81A9) }, /* Multiplex RC Interface */
         { USB_DEVICE(0x10C4, 0x81AC) }, /* MSD Dash Hawk */
         { USB_DEVICE(0x10C4, 0x81AD) }, /* INSYS USB Modem */
         { USB_DEVICE(0x10C4, 0x81C8) }, /* Lipowsky Industrie Elektronik GmbH, Baby-JTAG */
@@ -280,7 +281,10 @@ static int cp210x_get_config(struct usb_serial_port *port, u8 request,
                 dbg("%s - Unable to send config request, "
                                 "request=0x%x size=%d result=%d\n",
                                 __func__, request, size, result);
-                return -EPROTO;
+                if (result > 0)
+                        result = -EPROTO;
+
+                return result;
         }
 
         return 0;
@@ -331,7 +335,10 @@ static int cp210x_set_config(struct usb_serial_port *port, u8 request,
                 dbg("%s - Unable to send request, "
                                 "request=0x%x size=%d result=%d\n",
                                 __func__, request, size, result);
-                return -EPROTO;
+                if (result > 0)
+                        result = -EPROTO;
+
+                return result;
         }
 
         return 0;
@@ -395,10 +402,11 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
 
         dbg("%s - port %d", __func__, port->number);
 
-        if (cp210x_set_config_single(port, CP210X_IFC_ENABLE, UART_ENABLE)) {
-                dev_err(&port->dev, "%s - Unable to enable UART\n",
-                                __func__);
-                return -EPROTO;
+        result = cp210x_set_config_single(port, CP210X_IFC_ENABLE,
+                                                                UART_ENABLE);
+        if (result) {
+                dev_err(&port->dev, "%s - Unable to enable UART\n", __func__);
+                return result;
         }
 
         result = usb_serial_generic_open(tty, port);
@@ -520,18 +528,13 @@ static void cp210x_get_termios_port(struct usb_serial_port *port,
                 cflag |= PARENB;
                 break;
         case BITS_PARITY_MARK:
-                dbg("%s - parity = MARK (not supported, disabling parity)",
-                                __func__);
-                cflag &= ~PARENB;
-                bits &= ~BITS_PARITY_MASK;
-                cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
+                dbg("%s - parity = MARK", __func__);
+                cflag |= (PARENB|PARODD|CMSPAR);
                 break;
         case BITS_PARITY_SPACE:
-                dbg("%s - parity = SPACE (not supported, disabling parity)",
-                                __func__);
-                cflag &= ~PARENB;
-                bits &= ~BITS_PARITY_MASK;
-                cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
+                dbg("%s - parity = SPACE", __func__);
+                cflag &= ~PARODD;
+                cflag |= (PARENB|CMSPAR);
                 break;
         default:
                 dbg("%s - Unknown parity mode, disabling parity", __func__);
@@ -588,7 +591,6 @@ static void cp210x_set_termios(struct tty_struct *tty,
         if (!tty)
                 return;
 
-        tty->termios->c_cflag &= ~CMSPAR;
         cflag = tty->termios->c_cflag;
         old_cflag = old_termios->c_cflag;
         baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
@@ -643,16 +645,27 @@ static void cp210x_set_termios(struct tty_struct *tty,
                                         "not supported by device\n");
         }
 
-        if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
+        if ((cflag     & (PARENB|PARODD|CMSPAR)) !=
+            (old_cflag & (PARENB|PARODD|CMSPAR))) {
                 cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
                 bits &= ~BITS_PARITY_MASK;
                 if (cflag & PARENB) {
-                        if (cflag & PARODD) {
-                                bits |= BITS_PARITY_ODD;
-                                dbg("%s - parity = ODD", __func__);
+                        if (cflag & CMSPAR) {
+                            if (cflag & PARODD) {
+                                    bits |= BITS_PARITY_MARK;
+                                    dbg("%s - parity = MARK", __func__);
+                            } else {
+                                    bits |= BITS_PARITY_SPACE;
+                                    dbg("%s - parity = SPACE", __func__);
+                            }
                         } else {
-                                bits |= BITS_PARITY_EVEN;
-                                dbg("%s - parity = EVEN", __func__);
+                            if (cflag & PARODD) {
+                                    bits |= BITS_PARITY_ODD;
+                                    dbg("%s - parity = ODD", __func__);
+                            } else {
+                                    bits |= BITS_PARITY_EVEN;
+                                    dbg("%s - parity = EVEN", __func__);
+                            }
                         }
                 }
                 if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index f744ab7a3b1..98bf8334983 100644
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -138,7 +138,6 @@ static int cyberjack_startup(struct usb_serial *serial)
 
         for (i = 0; i < serial->num_ports; ++i) {
                 int result;
-                serial->port[i]->interrupt_in_urb->dev = serial->dev;
                 result = usb_submit_urb(serial->port[i]->interrupt_in_urb,
                                         GFP_KERNEL);
                 if (result)
@@ -208,7 +207,6 @@ static void cyberjack_close(struct usb_serial_port *port)
 static int cyberjack_write(struct tty_struct *tty,
         struct usb_serial_port *port, const unsigned char *buf, int count)
 {
-        struct usb_serial *serial = port->serial;
         struct cyberjack_private *priv = usb_get_serial_port_data(port);
         unsigned long flags;
         int result;
@@ -221,22 +219,18 @@ static int cyberjack_write(struct tty_struct *tty,
                 return 0;
         }
 
-        spin_lock_bh(&port->lock);
-        if (port->write_urb_busy) {
-                spin_unlock_bh(&port->lock);
+        if (!test_and_clear_bit(0, &port->write_urbs_free)) {
                 dbg("%s - already writing", __func__);
                 return 0;
         }
-        port->write_urb_busy = 1;
-        spin_unlock_bh(&port->lock);
 
         spin_lock_irqsave(&priv->lock, flags);
 
         if (count+priv->wrfilled > sizeof(priv->wrbuf)) {
                 /* To much data for buffer. Reset buffer. */
                 priv->wrfilled = 0;
-                port->write_urb_busy = 0;
                 spin_unlock_irqrestore(&priv->lock, flags);
+                set_bit(0, &port->write_urbs_free);
                 return 0;
         }
 
@@ -265,13 +259,7 @@ static int cyberjack_write(struct tty_struct *tty,
                 priv->wrsent = length;
 
                 /* set up our urb */
-                usb_fill_bulk_urb(port->write_urb, serial->dev,
-                              usb_sndbulkpipe(serial->dev, port->bulk_out_endpointAddress),
-                              port->write_urb->transfer_buffer, length,
-                              ((serial->type->write_bulk_callback) ?
-                               serial->type->write_bulk_callback :
-                               cyberjack_write_bulk_callback),
-                              port);
+                port->write_urb->transfer_buffer_length = length;
 
                 /* send the data out the bulk port */
                 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
@@ -283,7 +271,7 @@ static int cyberjack_write(struct tty_struct *tty,
                         priv->wrfilled = 0;
                         priv->wrsent = 0;
                         spin_unlock_irqrestore(&priv->lock, flags);
-                        port->write_urb_busy = 0;
+                        set_bit(0, &port->write_urbs_free);
                         return 0;
                 }
 
@@ -351,7 +339,6 @@ static void cyberjack_read_int_callback(struct urb *urb)
                 spin_unlock(&priv->lock);
 
                 if (!old_rdtodo) {
-                        port->read_urb->dev = port->serial->dev;
                         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                         if (result)
                                 dev_err(&port->dev, "%s - failed resubmitting "
@@ -362,7 +349,6 @@ static void cyberjack_read_int_callback(struct urb *urb)
         }
 
 resubmit:
-        port->interrupt_in_urb->dev = port->serial->dev;
         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
         if (result)
                 dev_err(&port->dev, "usb_submit_urb(read int) failed\n");
@@ -415,7 +401,6 @@ static void cyberjack_read_bulk_callback(struct urb *urb)
 
         /* Continue to read if we have still urbs to do. */
         if (todo /* || (urb->actual_length==port->bulk_in_endpointAddress)*/) {
-                port->read_urb->dev = port->serial->dev;
                 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                 if (result)
                         dev_err(&port->dev, "%s - failed resubmitting read "
@@ -432,7 +417,7 @@ static void cyberjack_write_bulk_callback(struct urb *urb)
 
         dbg("%s - port %d", __func__, port->number);
 
-        port->write_urb_busy = 0;
+        set_bit(0, &port->write_urbs_free);
         if (status) {
                 dbg("%s - nonzero write bulk status received: %d",
                     __func__, status);
@@ -455,13 +440,7 @@ static void cyberjack_write_bulk_callback(struct urb *urb)
                 priv->wrsent += length;
 
                 /* set up our urb */
-                usb_fill_bulk_urb(port->write_urb, port->serial->dev,
-                              usb_sndbulkpipe(port->serial->dev, port->bulk_out_endpointAddress),
-                              port->write_urb->transfer_buffer, length,
-                              ((port->serial->type->write_bulk_callback) ?
-                               port->serial->type->write_bulk_callback :
-                               cyberjack_write_bulk_callback),
-                              port);
+                port->write_urb->transfer_buffer_length = length;
 
                 /* send the data out the bulk port */
                 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index d9906eb9d16..07680d6b792 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -16,32 +16,6 @@
  *
  * See http://geocities.com/i0xox0i for information on this driver and the
  * earthmate usb device.
- *
- *  Lonnie Mendez <dignome@gmail.com>
- *  4-29-2005
- *      Fixed problem where setting or retreiving the serial config would fail
- *      with EPIPE.  Removed CRTS toggling so the driver behaves more like
- *      other usbserial adapters.  Issued new interval of 1ms instead of the
- *      default 10ms.  As a result, transfer speed has been substantially
- *      increased from avg. 850bps to avg. 3300bps.  initial termios has also
- *      been modified.  Cleaned up code and formatting issues so it is more
- *      readable.  Replaced the C++ style comments.
- *
- *  Lonnie Mendez <dignome@gmail.com>
- *  12-15-2004
- *      Incorporated write buffering from pl2303 driver.  Fixed bug with line
- *      handling so both lines are raised in cypress_open. (was dropping rts)
- *      Various code cleanups made as well along with other misc bug fixes.
- *
- *  Lonnie Mendez <dignome@gmail.com>
- *  04-10-2004
- *      Driver modified to support dynamic line settings.  Various improvements
- *      and features.
- *
- *  Neil Whelchel
- *  10-2003
- *      Driver first released.
- *
  */
 
 /* Thanks to Neil Whelchel for writing the first cypress m8 implementation
@@ -1162,8 +1136,6 @@ static void cypress_unthrottle(struct tty_struct *tty)
                 return;
 
         if (actually_throttled) {
-                port->interrupt_in_urb->dev = port->serial->dev;
-
                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
                 if (result) {
                         dev_err(&port->dev, "%s - failed submitting read urb, "
@@ -1352,7 +1324,6 @@ static void cypress_write_int_callback(struct urb *urb)
                 dbg("%s - nonzero write bulk status received: %d",
                         __func__, status);
                 port->interrupt_out_urb->transfer_buffer_length = 1;
-                port->interrupt_out_urb->dev = port->serial->dev;
                 result = usb_submit_urb(port->interrupt_out_urb, GFP_ATOMIC);
                 if (!result)
                         return;
diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c
index e92cbefc0f8..6d26a77d0f2 100644
--- a/drivers/usb/serial/digi_acceleport.c
+++ b/drivers/usb/serial/digi_acceleport.c
@@ -13,222 +13,6 @@
 *
 *  Peter Berger (pberger@brimson.com)
 *  Al Borchers (borchers@steinerpoint.com)
-* 
-* (12/03/2001) gkh
-*       switched to using port->port.count instead of private version.
-*       Removed port->active
-*
-* (04/08/2001) gb
-*       Identify version on module load.
-*
-* (11/01/2000) Adam J. Richter
-*       usb_device_id table support
-* 
-* (11/01/2000) pberger and borchers
-*    -- Turned off the USB_DISABLE_SPD flag for write bulk urbs--it caused
-*       USB 4 ports to hang on startup.
-*    -- Serialized access to write urbs by adding the dp_write_urb_in_use
-*       flag; otherwise, the driver caused SMP system hangs.  Watching the
-*       urb status is not sufficient.
-*
-* (10/05/2000) gkh
-*    -- Fixed bug with urb->dev not being set properly, now that the usb
-*       core needs it.
-* 
-*  (8/8/2000) pberger and borchers
-*    -- Fixed close so that 
-*       - it can timeout while waiting for transmit idle, if needed;
-*       - it ignores interrupts when flushing the port, turning
-*         of modem signalling, and so on;
-*       - it waits for the flush to really complete before returning.
-*    -- Read_bulk_callback and write_bulk_callback check for a closed
-*       port before using the tty struct or writing to the port.
-*    -- The two changes above fix the oops caused by interrupted closes.
-*    -- Added interruptible args to write_oob_command and set_modem_signals
-*       and added a timeout arg to transmit_idle; needed for fixes to
-*       close.
-*    -- Added code for rx_throttle and rx_unthrottle so that input flow
-*       control works.
-*    -- Added code to set overrun, parity, framing, and break errors
-*       (untested).
-*    -- Set USB_DISABLE_SPD flag for write bulk urbs, so no 0 length
-*       bulk writes are done.  These hung the Digi USB device.  The
-*       0 length bulk writes were a new feature of usb-uhci added in
-*       the 2.4.0-test6 kernels.
-*    -- Fixed mod inc race in open; do mod inc before sleeping to wait
-*       for a close to finish.
-*
-*  (7/31/2000) pberger
-*    -- Fixed bugs with hardware handshaking:
-*       - Added code to set/clear tty->hw_stopped in digi_read_oob_callback()
-*         and digi_set_termios()
-*    -- Added code in digi_set_termios() to
-*       - add conditional in code handling transition from B0 to only
-*         set RTS if RTS/CTS flow control is either not in use or if
-*         the port is not currently throttled.
-*       - handle turning off CRTSCTS.
-*
-*  (7/30/2000) borchers
-*    -- Added support for more than one Digi USB device by moving
-*       globals to a private structure in the pointed to from the
-*       usb_serial structure.
-*    -- Moved the modem change and transmit idle wait queues into
-*       the port private structure, so each port has its own queue
-*       rather than sharing global queues.
-*    -- Added support for break signals.
-*
-*  (7/25/2000) pberger
-*    -- Added USB-2 support.  Note: the USB-2 supports 3 devices: two
-*       serial and a parallel port.  The parallel port is implemented
-*       as a serial-to-parallel converter.  That is, the driver actually
-*       presents all three USB-2 interfaces as serial ports, but the third
-*       one physically connects to a parallel device.  Thus, for example,
-*       one could plug a parallel printer into the USB-2's third port,
-*       but from the kernel's (and userland's) point of view what's
-*       actually out there is a serial device.
-*
-*  (7/15/2000) borchers
-*    -- Fixed race in open when a close is in progress.
-*    -- Keep count of opens and dec the module use count for each
-*       outstanding open when shutdown is called (on disconnect).
-*    -- Fixed sanity checks in read_bulk_callback and write_bulk_callback
-*       so pointers are checked before use.
-*    -- Split read bulk callback into in band and out of band
-*       callbacks, and no longer restart read chains if there is
-*       a status error or a sanity error.  This fixed the seg
-*       faults and other errors we used to get on disconnect.
-*    -- Port->active is once again a flag as usb-serial intended it
-*       to be, not a count.  Since it was only a char it would
-*       have been limited to 256 simultaneous opens.  Now the open
-*       count is kept in the port private structure in dp_open_count.
-*    -- Added code for modularization of the digi_acceleport driver.
-*
-*  (6/27/2000) pberger and borchers
-*    -- Zeroed out sync field in the wakeup_task before first use;
-*       otherwise the uninitialized value might prevent the task from
-*       being scheduled.
-*    -- Initialized ret value to 0 in write_bulk_callback, otherwise
-*       the uninitialized value could cause a spurious debugging message.
-*
-*  (6/22/2000) pberger and borchers
-*    -- Made cond_wait_... inline--apparently on SPARC the flags arg
-*       to spin_lock_irqsave cannot be passed to another function
-*       to call spin_unlock_irqrestore.  Thanks to Pauline Middelink.
-*    -- In digi_set_modem_signals the inner nested spin locks use just
-*       spin_lock() rather than spin_lock_irqsave().  The old code
-*       mistakenly left interrupts off.  Thanks to Pauline Middelink.
-*    -- copy_from_user (which can sleep) is no longer called while a
-*       spinlock is held.  We copy to a local buffer before getting
-*       the spinlock--don't like the extra copy but the code is simpler.
-*    -- Printk and dbg are no longer called while a spin lock is held.
-*
-*  (6/4/2000) pberger and borchers
-*    -- Replaced separate calls to spin_unlock_irqrestore and
-*       interruptible_sleep_on_timeout with a new function
-*       cond_wait_interruptible_timeout_irqrestore.  This eliminates
-*       the race condition where the wake up could happen after
-*       the unlock and before the sleep.
-*    -- Close now waits for output to drain.
-*    -- Open waits until any close in progress is finished.
-*    -- All out of band responses are now processed, not just the
-*       first in a USB packet.
-*    -- Fixed a bug that prevented the driver from working when the
-*       first Digi port was not the first USB serial port--the driver
-*       was mistakenly using the external USB serial port number to
-*       try to index into its internal ports.
-*    -- Fixed an SMP bug -- write_bulk_callback is called directly from
-*       an interrupt, so spin_lock_irqsave/spin_unlock_irqrestore are
-*       needed for locks outside write_bulk_callback that are also
-*       acquired by write_bulk_callback to prevent deadlocks.
-*    -- Fixed support for select() by making digi_chars_in_buffer()
-*       return 256 when -EINPROGRESS is set, as the line discipline
-*       code in n_tty.c expects.
-*    -- Fixed an include file ordering problem that prevented debugging
-*       messages from working.
-*    -- Fixed an intermittent timeout problem that caused writes to
-*       sometimes get stuck on some machines on some kernels.  It turns
-*       out in these circumstances write_chan() (in n_tty.c) was
-*       asleep waiting for our wakeup call.  Even though we call
-*       wake_up_interruptible() in digi_write_bulk_callback(), there is
-*       a race condition that could cause the wakeup to fail: if our
-*       wake_up_interruptible() call occurs between the time that our
-*       driver write routine finishes and write_chan() sets current->state
-*       to TASK_INTERRUPTIBLE, the effect of our wakeup setting the state
-*       to TASK_RUNNING will be lost and write_chan's subsequent call to
-*       schedule() will never return (unless it catches a signal).
-*       This race condition occurs because write_bulk_callback() (and thus
-*       the wakeup) are called asynchronously from an interrupt, rather than
-*       from the scheduler.  We can avoid the race by calling the wakeup
-*       from the scheduler queue and that's our fix:  Now, at the end of
-*       write_bulk_callback() we queue up a wakeup call on the scheduler
-*       task queue.  We still also invoke the wakeup directly since that
-*       squeezes a bit more performance out of the driver, and any lost
-*       race conditions will get cleaned up at the next scheduler run.
-*
-*       NOTE:  The problem also goes away if you comment out
-*       the two code lines in write_chan() where current->state
-*       is set to TASK_RUNNING just before calling driver.write() and to
-*       TASK_INTERRUPTIBLE immediately afterwards.  This is why the
-*       problem did not show up with the 2.2 kernels -- they do not
-*       include that code.
-*
-*  (5/16/2000) pberger and borchers
-*    -- Added timeouts to sleeps, to defend against lost wake ups.
-*    -- Handle transition to/from B0 baud rate in digi_set_termios.
-*
-*  (5/13/2000) pberger and borchers
-*    -- All commands now sent on out of band port, using
-*       digi_write_oob_command.
-*    -- Get modem control signals whenever they change, support TIOCMGET/
-*       SET/BIS/BIC ioctls.
-*    -- digi_set_termios now supports parity, word size, stop bits, and
-*       receive enable.
-*    -- Cleaned up open and close, use digi_set_termios and
-*       digi_write_oob_command to set port parameters.
-*    -- Added digi_startup_device to start read chains on all ports.
-*    -- Write buffer is only used when count==1, to be sure put_char can
-*       write a char (unless the buffer is full).
-*
-*  (5/10/2000) pberger and borchers
-*    -- Added MOD_INC_USE_COUNT/MOD_DEC_USE_COUNT calls on open/close.
-*    -- Fixed problem where the first incoming character is lost on
-*       port opens after the first close on that port.  Now we keep
-*       the read_urb chain open until shutdown.
-*    -- Added more port conditioning calls in digi_open and digi_close.
-*    -- Convert port->active to a use count so that we can deal with multiple
-*       opens and closes properly.
-*    -- Fixed some problems with the locking code.
-*
-*  (5/3/2000) pberger and borchers
-*    -- First alpha version of the driver--many known limitations and bugs.
-*
-*
-*  Locking and SMP
-*
-*  - Each port, including the out-of-band port, has a lock used to
-*    serialize all access to the port's private structure.
-*  - The port lock is also used to serialize all writes and access to
-*    the port's URB.
-*  - The port lock is also used for the port write_wait condition
-*    variable.  Holding the port lock will prevent a wake up on the
-*    port's write_wait; this can be used with cond_wait_... to be sure
-*    the wake up is not lost in a race when dropping the lock and
-*    sleeping waiting for the wakeup.
-*  - digi_write() does not sleep, since it is sometimes called on
-*    interrupt time.
-*  - digi_write_bulk_callback() and digi_read_bulk_callback() are
-*    called directly from interrupts.  Hence spin_lock_irqsave()
-*    and spin_unlock_irqrestore() are used in the rest of the code
-*    for any locks they acquire.
-*  - digi_write_bulk_callback() gets the port lock before waking up
-*    processes sleeping on the port write_wait.  It also schedules
-*    wake ups so they happen from the scheduler, because the tty
-*    system can miss wake ups from interrupts.
-*  - All sleeps use a timeout of DIGI_RETRY_TIMEOUT before looping to
-*    recheck the condition they are sleeping on.  This is defensive,
-*    in case a wake up is lost.
-*  - Following Documentation/DocBook/kernel-locking.tmpl no spin locks
-*    are held when calling copy_to/from_user or printk.
 */
 
 #include <linux/kernel.h>
@@ -654,7 +438,6 @@ static int digi_write_oob_command(struct usb_serial_port *port,
                         len &= ~3;
                 memcpy(oob_port->write_urb->transfer_buffer, buf, len);
                 oob_port->write_urb->transfer_buffer_length = len;
-                oob_port->write_urb->dev = port->serial->dev;
                 ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
                 if (ret == 0) {
                         oob_priv->dp_write_urb_in_use = 1;
@@ -732,7 +515,6 @@ static int digi_write_inb_command(struct usb_serial_port *port,
                         memcpy(data, buf, len);
                         port->write_urb->transfer_buffer_length = len;
                 }
-                port->write_urb->dev = port->serial->dev;
 
                 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
                 if (ret == 0) {
@@ -803,7 +585,6 @@ static int digi_set_modem_signals(struct usb_serial_port *port,
         data[7] = 0;
 
         oob_port->write_urb->transfer_buffer_length = 8;
-        oob_port->write_urb->dev = port->serial->dev;
 
         ret = usb_submit_urb(oob_port->write_urb, GFP_ATOMIC);
         if (ret == 0) {
@@ -899,10 +680,8 @@ static void digi_rx_unthrottle(struct tty_struct *tty)
         spin_lock_irqsave(&priv->dp_port_lock, flags);
 
         /* restart read chain */
-        if (priv->dp_throttle_restart) {
-                port->read_urb->dev = port->serial->dev;
+        if (priv->dp_throttle_restart)
                 ret = usb_submit_urb(port->read_urb, GFP_ATOMIC);
-        }
 
         /* turn throttle off */
         priv->dp_throttled = 0;
@@ -1195,7 +974,6 @@ static int digi_write(struct tty_struct *tty, struct usb_serial_port *port,
         }
 
         port->write_urb->transfer_buffer_length = data_len+2;
-        port->write_urb->dev = port->serial->dev;
 
         *data++ = DIGI_CMD_SEND_DATA;
         *data++ = data_len;
@@ -1271,7 +1049,6 @@ static void digi_write_bulk_callback(struct urb *urb)
                         = (unsigned char)priv->dp_out_buf_len;
                 port->write_urb->transfer_buffer_length =
                                                 priv->dp_out_buf_len + 2;
-                port->write_urb->dev = serial->dev;
                 memcpy(port->write_urb->transfer_buffer + 2, priv->dp_out_buf,
                         priv->dp_out_buf_len);
                 ret = usb_submit_urb(port->write_urb, GFP_ATOMIC);
@@ -1473,7 +1250,6 @@ static int digi_startup_device(struct usb_serial *serial)
         /* set USB_DISABLE_SPD flag for write bulk urbs */
         for (i = 0; i < serial->type->num_ports + 1; i++) {
                 port = serial->port[i];
-                port->write_urb->dev = port->serial->dev;
                 ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
                 if (ret != 0) {
                         dev_err(&port->dev,
@@ -1616,7 +1392,6 @@ static void digi_read_bulk_callback(struct urb *urb)
         }
 
         /* continue read */
-        urb->dev = port->serial->dev;
         ret = usb_submit_urb(urb, GFP_ATOMIC);
         if (ret != 0 && ret != -EPERM) {
                 dev_err(&port->dev,
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index ff3db5d056a..c290df97108 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -2105,6 +2105,9 @@ static void ftdi_set_termios(struct tty_struct *tty,
 
         cflag = termios->c_cflag;
 
+        if (old_termios == 0)
+                goto no_skip;
+
         if (old_termios->c_cflag == termios->c_cflag
             && old_termios->c_ispeed == termios->c_ispeed
             && old_termios->c_ospeed == termios->c_ospeed)
@@ -2118,6 +2121,7 @@ static void ftdi_set_termios(struct tty_struct *tty,
             (termios->c_cflag & (CSIZE|PARODD|PARENB|CMSPAR|CSTOPB)))
                 goto no_data_parity_stop_changes;
 
+no_skip:
         /* Set number of data bits, parity, stop bits */
 
         urb_value = 0;
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 1a49ca9c8ea..bf12565f8e8 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -901,7 +901,6 @@ static int garmin_init_session(struct usb_serial_port *port)
                 usb_kill_urb(port->interrupt_in_urb);
 
                 dbg("%s - adding interrupt input", __func__);
-                port->interrupt_in_urb->dev = serial->dev;
                 status = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
                 if (status)
                         dev_err(&serial->dev->dev,
@@ -1277,7 +1276,6 @@ static void garmin_read_int_callback(struct urb *urb)
         unsigned long flags;
         int retval;
         struct usb_serial_port *port = urb->context;
-        struct usb_serial *serial = port->serial;
         struct garmin_data *garmin_data_p = usb_get_serial_port_data(port);
         unsigned char *data = urb->transfer_buffer;
         int status = urb->status;
@@ -1311,12 +1309,6 @@ static void garmin_read_int_callback(struct urb *urb)
                 if (0 == (garmin_data_p->flags & FLAGS_BULK_IN_ACTIVE)) {
 
                         /* bulk data available */
-                        usb_fill_bulk_urb(port->read_urb, serial->dev,
-                                        usb_rcvbulkpipe(serial->dev,
-                                                port->bulk_in_endpointAddress),
-                                        port->read_urb->transfer_buffer,
-                                        port->read_urb->transfer_buffer_length,
-                                        garmin_read_bulk_callback, port);
                         retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                         if (retval) {
                                 dev_err(&port->dev,
@@ -1353,7 +1345,6 @@ static void garmin_read_int_callback(struct urb *urb)
 
         garmin_read_process(garmin_data_p, data, urb->actual_length, 0);
 
-        port->interrupt_in_urb->dev = port->serial->dev;
         retval = usb_submit_urb(urb, GFP_ATOMIC);
         if (retval)
                 dev_err(&urb->dev->dev,
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index e4db5ad2bc5..f7403576f99 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -1,7 +1,7 @@
 /*
  * USB Serial Converter Generic functions
  *
- * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
+ * Copyright (C) 2010 - 2011 Johan Hovold (jhovold@gmail.com)
  * Copyright (C) 1999 - 2002 Greg Kroah-Hartman (greg@kroah.com)
  *
  *      This program is free software; you can redistribute it and/or
@@ -132,7 +132,7 @@ int usb_serial_generic_open(struct tty_struct *tty, struct usb_serial_port *port
 
         /* if we have a bulk endpoint, start reading from it */
         if (port->bulk_in_size)
-                result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
+                result = usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);
 
         return result;
 }
@@ -157,8 +157,10 @@ static void generic_cleanup(struct usb_serial_port *port)
                         kfifo_reset_out(&port->write_fifo);
                         spin_unlock_irqrestore(&port->lock, flags);
                 }
-                if (port->bulk_in_size)
-                        usb_kill_urb(port->read_urb);
+                if (port->bulk_in_size) {
+                        for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
+                                usb_kill_urb(port->read_urbs[i]);
+                }
         }
 }
 
@@ -308,19 +310,52 @@ int usb_serial_generic_chars_in_buffer(struct tty_struct *tty)
         return chars;
 }
 
-int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
+static int usb_serial_generic_submit_read_urb(struct usb_serial_port *port,
+                                                int index, gfp_t mem_flags)
+{
+        int res;
+
+        if (!test_and_clear_bit(index, &port->read_urbs_free))
+                return 0;
+
+        dbg("%s - port %d, urb %d\n", __func__, port->number, index);
+
+        res = usb_submit_urb(port->read_urbs[index], mem_flags);
+        if (res) {
+                if (res != -EPERM) {
+                        dev_err(&port->dev,
+                                        "%s - usb_submit_urb failed: %d\n",
+                                        __func__, res);
+                }
+                set_bit(index, &port->read_urbs_free);
+                return res;
+        }
+
+        return 0;
+}
+
+int usb_serial_generic_submit_read_urbs(struct usb_serial_port *port,
                                         gfp_t mem_flags)
 {
-        int result;
+        int res;
+        int i;
 
-        result = usb_submit_urb(port->read_urb, mem_flags);
-        if (result && result != -EPERM) {
-                dev_err(&port->dev, "%s - error submitting urb: %d\n",
-                                                        __func__, result);
+        dbg("%s - port %d", __func__, port->number);
+
+        for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
+                res = usb_serial_generic_submit_read_urb(port, i, mem_flags);
+                if (res)
+                        goto err;
         }
-        return result;
+
+        return 0;
+err:
+        for (; i >= 0; --i)
+                usb_kill_urb(port->read_urbs[i]);
+
+        return res;
 }
-EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urb);
+EXPORT_SYMBOL_GPL(usb_serial_generic_submit_read_urbs);
 
 void usb_serial_generic_process_read_urb(struct urb *urb)
 {
@@ -356,14 +391,19 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
 {
         struct usb_serial_port *port = urb->context;
         unsigned char *data = urb->transfer_buffer;
-        int status = urb->status;
         unsigned long flags;
+        int i;
 
-        dbg("%s - port %d", __func__, port->number);
+        for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
+                if (urb == port->read_urbs[i])
+                        break;
+        }
+        set_bit(i, &port->read_urbs_free);
 
-        if (unlikely(status != 0)) {
-                dbg("%s - nonzero read bulk status received: %d",
-                    __func__, status);
+        dbg("%s - port %d, urb %d, len %d\n", __func__, port->number, i,
+                                                        urb->actual_length);
+        if (urb->status) {
+                dbg("%s - non-zero urb status: %d\n", __func__, urb->status);
                 return;
         }
 
@@ -376,7 +416,7 @@ void usb_serial_generic_read_bulk_callback(struct urb *urb)
         port->throttled = port->throttle_req;
         if (!port->throttled) {
                 spin_unlock_irqrestore(&port->lock, flags);
-                usb_serial_generic_submit_read_urb(port, GFP_ATOMIC);
+                usb_serial_generic_submit_read_urb(port, i, GFP_ATOMIC);
         } else
                 spin_unlock_irqrestore(&port->lock, flags);
 }
@@ -443,7 +483,7 @@ void usb_serial_generic_unthrottle(struct tty_struct *tty)
         spin_unlock_irq(&port->lock);
 
         if (was_throttled)
-                usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
+                usb_serial_generic_submit_read_urbs(port, GFP_KERNEL);
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_unthrottle);
 
@@ -509,8 +549,9 @@ int usb_serial_generic_resume(struct usb_serial *serial)
                 if (!test_bit(ASYNCB_INITIALIZED, &port->port.flags))
                         continue;
 
-                if (port->read_urb) {
-                        r = usb_submit_urb(port->read_urb, GFP_NOIO);
+                if (port->bulk_in_size) {
+                        r = usb_serial_generic_submit_read_urbs(port,
+                                                                GFP_NOIO);
                         if (r < 0)
                                 c++;
                 }
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index 2ee807523f5..abd2ee2b2f9 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -610,7 +610,6 @@ static void edge_interrupt_callback(struct urb *urb)
 
                                         /* we have pending bytes on the
                                            bulk in pipe, send a request */
-                                        edge_serial->read_urb->dev = edge_serial->serial->dev;
                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
                                         if (result) {
                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __func__, result);
@@ -711,7 +710,6 @@ static void edge_bulk_in_callback(struct urb *urb)
         /* check to see if there's any more data for us to read */
         if (edge_serial->rxBytesAvail > 0) {
                 dbg("%s - posting a read", __func__);
-                edge_serial->read_urb->dev = edge_serial->serial->dev;
                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
                 if (retval) {
                         dev_err(&urb->dev->dev,
@@ -1330,7 +1328,6 @@ static void send_more_port_data(struct edgeport_serial *edge_serial,
         edge_port->txCredits -= count;
         edge_port->icount.tx += count;
 
-        urb->dev = edge_serial->serial->dev;
         status = usb_submit_urb(urb, GFP_ATOMIC);
         if (status) {
                 /* something went wrong */
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c
index 0aac00afb5c..e44d375edaa 100644
--- a/drivers/usb/serial/io_ti.c
+++ b/drivers/usb/serial/io_ti.c
@@ -15,13 +15,6 @@
  * For questions or problems with this driver, contact Inside Out
  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  * or Al Borchers <alborchers@steinerpoint.com>.
- *
- * Version history:
- *
- *      July 11, 2002   Removed 4 port device structure since all TI UMP
- *                      chips have only 2 ports
- *                      David Iacovelli (davidi@ionetworks.com)
- *
  */
 
 #include <linux/kernel.h>
@@ -1777,12 +1770,11 @@ static void edge_bulk_in_callback(struct urb *urb)
 exit:
         /* continue read unless stopped */
         spin_lock(&edge_port->ep_lock);
-        if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
-                urb->dev = edge_port->port->serial->dev;
+        if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
                 retval = usb_submit_urb(urb, GFP_ATOMIC);
-        } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
+        else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
-        }
+
         spin_unlock(&edge_port->ep_lock);
         if (retval)
                 dev_err(&urb->dev->dev,
@@ -1959,9 +1951,7 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
                         status = -EINVAL;
                         goto release_es_lock;
                 }
-                urb->complete = edge_interrupt_callback;
                 urb->context = edge_serial;
-                urb->dev = dev;
                 status = usb_submit_urb(urb, GFP_KERNEL);
                 if (status) {
                         dev_err(&port->dev,
@@ -1987,9 +1977,7 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
                 goto unlink_int_urb;
         }
         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
-        urb->complete = edge_bulk_in_callback;
         urb->context = edge_port;
-        urb->dev = dev;
         status = usb_submit_urb(urb, GFP_KERNEL);
         if (status) {
                 dev_err(&port->dev,
@@ -2118,12 +2106,7 @@ static void edge_send(struct tty_struct *tty)
                                 port->write_urb->transfer_buffer);
 
         /* set up our urb */
-        usb_fill_bulk_urb(port->write_urb, port->serial->dev,
-                           usb_sndbulkpipe(port->serial->dev,
-                                            port->bulk_out_endpointAddress),
-                           port->write_urb->transfer_buffer, count,
-                           edge_bulk_out_callback,
-                           port);
+        port->write_urb->transfer_buffer_length = count;
 
         /* send the data out the bulk port */
         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
@@ -2267,9 +2250,6 @@ static int restart_read(struct edgeport_port *edge_port)
 
         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
                 urb = edge_port->port->read_urb;
-                urb->complete = edge_bulk_in_callback;
-                urb->context = edge_port;
-                urb->dev = edge_port->port->serial->dev;
                 status = usb_submit_urb(urb, GFP_ATOMIC);
         }
         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index 4735931b4c7..36f5cbe9048 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -8,40 +8,6 @@
  *      it under the terms of the GNU General Public License as published by
  *      the Free Software Foundation; either version 2 of the License, or
  *      (at your option) any later version.
- *
- * (12/12/2002) ganesh
- *      Added support for practically all devices supported by ActiveSync
- *      on Windows. Thanks to Wes Cilldhaire <billybobjoehenrybob@hotmail.com>.
- *
- * (26/11/2002) ganesh
- *      Added insmod options to specify product and vendor id.
- *      Use modprobe ipaq vendor=0xfoo product=0xbar
- *
- * (26/7/2002) ganesh
- *      Fixed up broken error handling in ipaq_open. Retry the "kickstart"
- *      packet much harder - this drastically reduces connection failures.
- *
- * (30/4/2002) ganesh
- *      Added support for the Casio EM500. Completely untested. Thanks
- *      to info from Nathan <wfilardo@fuse.net>
- *
- * (19/3/2002) ganesh
- *      Don't submit urbs while holding spinlocks. Not strictly necessary
- *      in 2.5.x.
- *
- * (8/3/2002) ganesh
- *      The ipaq sometimes emits a '\0' before the CLIENT string. At this
- *      point of time, the ppp ldisc is not yet attached to the tty, so
- *      n_tty echoes "^ " to the ipaq, which messes up the chat. In 2.5.6-pre2
- *      this causes a panic because echo_char() tries to sleep in interrupt
- *      context.
- *      The fix is to tell the upper layers that this is a raw device so that
- *      echoing is suppressed. Thanks to Lyle Lindholm for a detailed bug
- *      report.
- *
- * (25/2/2002) ganesh
- *      Added support for the HP Jornada 548 and 568. Completely untested.
- *      Thanks to info from Heath Robinson and Arieh Davidoff.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index ccbce4066d0..0c537da0d3c 100644
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -22,38 +22,6 @@
  *
  * See Documentation/usb/usb-serial.txt for more information on using this
  * driver
- *
- * 2008_Jun_02  Felipe Balbi <me@felipebalbi.com>
- *      Introduced common header to be used also in USB Gadget Framework.
- *      Still needs some other style fixes.
- *
- * 2007_Jun_21  Alan Cox <alan@lxorguk.ukuu.org.uk>
- *      Minimal cleanups for some of the driver problens and tty layer abuse.
- *      Still needs fixing to allow multiple dongles.
- *
- * 2002_Mar_07  greg kh
- *      moved some needed structures and #define values from the
- *      net/irda/irda-usb.h file into our file, as we don't want to depend on
- *      that codebase compiling correctly :)
- *
- * 2002_Jan_14  gb
- *      Added module parameter to force specific number of XBOFs.
- *      Added ir_xbof_change().
- *      Reorganized read_bulk_callback error handling.
- *      Switched from FILL_BULK_URB() to usb_fill_bulk_urb().
- *
- * 2001_Nov_08  greg kh
- *      Changed the irda_usb_find_class_desc() function based on comments and
- *      code from Martin Diehl.
- *
- * 2001_Nov_01  greg kh
- *      Added support for more IrDA USB devices.
- *      Added support for zero packet.  Added buffer override paramater, so
- *      users can transfer larger packets at once if they wish.  Both patches
- *      came from Dag Brattli <dag@obexcode.com>.
- *
- * 2001_Oct_07  greg kh
- *      initial version released.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c
index 6aca631a407..64d0ffd4440 100644
--- a/drivers/usb/serial/iuu_phoenix.c
+++ b/drivers/usb/serial/iuu_phoenix.c
@@ -1168,15 +1168,14 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port)
                           port->write_urb->transfer_buffer, 1,
                           read_rxcmd_callback, port);
         result = usb_submit_urb(port->write_urb, GFP_KERNEL);
-
         if (result) {
                 dev_err(&port->dev, "%s - failed submitting read urb,"
                         " error %d\n", __func__, result);
                 iuu_close(port);
-                return -EPROTO;
         } else {
                 dbg("%s - rxcmd OK", __func__);
         }
+
         return result;
 }
 
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index a442352d7b6..bc8dc203e81 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -25,73 +25,6 @@
 
   Tip 'o the hat to IBM (and previously Linuxcare :) for supporting
   staff in their work on open source projects.
-
-  Change History
-
-    2003sep04   LPM (Keyspan) add support for new single port product USA19HS.
-                                Improve setup message handling for all devices.
-
-    Wed Feb 19 22:00:00 PST 2003 (Jeffrey S. Laing <keyspan@jsl.com>)
-      Merged the current (1/31/03) Keyspan code with the current (2.4.21-pre4)
-      Linux source tree.  The Linux tree lacked support for the 49WLC and
-      others.  The Keyspan patches didn't work with the current kernel.
-
-    2003jan30   LPM     add support for the 49WLC and MPR
-
-    Wed Apr 25 12:00:00 PST 2002 (Keyspan)
-      Started with Hugh Blemings' code dated Jan 17, 2002.  All adapters
-      now supported (including QI and QW).  Modified port open, port
-      close, and send setup() logic to fix various data and endpoint
-      synchronization bugs and device LED status bugs.  Changed keyspan_
-      write_room() to accurately return transmit buffer availability.
-      Changed forwardingLength from 1 to 16 for all adapters.
-
-    Fri Oct 12 16:45:00 EST 2001
-      Preliminary USA-19QI and USA-28 support (both test OK for me, YMMV)
-
-    Wed Apr 25 12:00:00 PST 2002 (Keyspan)
-      Started with Hugh Blemings' code dated Jan 17, 2002.  All adapters
-      now supported (including QI and QW).  Modified port open, port
-      close, and send setup() logic to fix various data and endpoint
-      synchronization bugs and device LED status bugs.  Changed keyspan_
-      write_room() to accurately return transmit buffer availability.
-      Changed forwardingLength from 1 to 16 for all adapters.
-
-    Fri Oct 12 16:45:00 EST 2001
-      Preliminary USA-19QI and USA-28 support (both test OK for me, YMMV)
-
-    Mon Oct  8 14:29:00 EST 2001 hugh
-      Fixed bug that prevented mulitport devices operating correctly
-      if they weren't the first unit attached.
-
-    Sat Oct  6 12:31:21 EST 2001 hugh
-      Added support for USA-28XA and -28XB, misc cleanups, break support
-      for usa26 based models thanks to David Gibson.
-
-    Thu May 31 11:56:42 PDT 2001 gkh
-      switched from using spinlock to a semaphore
-
-    (04/08/2001) gb
-        Identify version on module load.
-
-    (11/01/2000) Adam J. Richter
-        usb_device_id table support.
-
-    Tue Oct 10 23:15:33 EST 2000 Hugh
-      Merged Paul's changes with my USA-49W mods.  Work in progress
-      still...
-
-    Wed Jul 19 14:00:42 EST 2000 gkh
-      Added module_init and module_exit functions to handle the fact that
-      this driver is a loadable module now.
-
-    Tue Jul 18 16:14:52 EST 2000 Hugh
-      Basic character input/output for USA-19 now mostly works,
-      fixed at 9600 baud for the moment.
-
-    Sat Jul  8 11:11:48 EST 2000 Hugh
-      First public release - nothing works except the firmware upload.
-      Tested on PPC and x86 architectures, seems to behave...
 */
 
 
@@ -397,7 +330,6 @@ static int keyspan_write(struct tty_struct *tty,
                 /* send the data out the bulk port */
                 this_urb->transfer_buffer_length = todo + dataOffset;
 
-                this_urb->dev = port->serial->dev;
                 err = usb_submit_urb(this_urb, GFP_ATOMIC);
                 if (err != 0)
                         dbg("usb_submit_urb(write bulk) failed (%d)", err);
@@ -463,7 +395,6 @@ static void	usa26_indat_callback(struct urb *urb)
         tty_kref_put(tty);
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = port->serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -559,7 +490,6 @@ static void	usa26_instat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -609,7 +539,6 @@ static void usa28_indat_callback(struct urb *urb)
                 tty_kref_put(tty);
 
                 /* Resubmit urb so we continue receiving */
-                urb->dev = port->serial->dev;
                 err = usb_submit_urb(urb, GFP_ATOMIC);
                 if (err != 0)
                         dbg("%s - resubmit read urb failed. (%d)",
@@ -694,7 +623,6 @@ static void	usa28_instat_callback(struct urb *urb)
         }
 
                 /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -789,8 +717,6 @@ static void	usa49_instat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
-
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -848,7 +774,6 @@ static void	usa49_indat_callback(struct urb *urb)
         tty_kref_put(tty);
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = port->serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -919,8 +844,6 @@ static void usa49wg_indat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
-
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -996,7 +919,6 @@ static void usa90_indat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = port->serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -1047,7 +969,6 @@ static void	usa90_instat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -1123,7 +1044,6 @@ static void	usa67_instat_callback(struct urb *urb)
         }
 
         /* Resubmit urb so we continue receiving */
-        urb->dev = serial->dev;
         err = usb_submit_urb(urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - resubmit read urb failed. (%d)", __func__, err);
@@ -1223,7 +1143,6 @@ static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port)
                 urb = p_priv->in_urbs[i];
                 if (urb == NULL)
                         continue;
-                urb->dev = serial->dev;
 
                 /* make sure endpoint data toggle is synchronized
                    with the device */
@@ -1239,7 +1158,6 @@ static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port)
                 urb = p_priv->out_urbs[i];
                 if (urb == NULL)
                         continue;
-                urb->dev = serial->dev;
                 /* usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
                                                 usb_pipeout(urb->pipe), 0); */
         }
@@ -1956,7 +1874,6 @@ static int keyspan_usa26_send_setup(struct usb_serial *serial,
         /* send the data out the device on control endpoint */
         this_urb->transfer_buffer_length = sizeof(msg);
 
-        this_urb->dev = serial->dev;
         err = usb_submit_urb(this_urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - usb_submit_urb(setup) failed (%d)", __func__, err);
@@ -2084,7 +2001,6 @@ static int keyspan_usa28_send_setup(struct usb_serial *serial,
         /* send the data out the device on control endpoint */
         this_urb->transfer_buffer_length = sizeof(msg);
 
-        this_urb->dev = serial->dev;
         err = usb_submit_urb(this_urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - usb_submit_urb(setup) failed", __func__);
@@ -2271,8 +2187,6 @@ static int keyspan_usa49_send_setup(struct usb_serial *serial,
 
                 /* send the data out the device on control endpoint */
                 this_urb->transfer_buffer_length = sizeof(msg);
-
-                this_urb->dev = serial->dev;
         }
         err = usb_submit_urb(this_urb, GFP_ATOMIC);
         if (err != 0)
@@ -2415,7 +2329,6 @@ static int keyspan_usa90_send_setup(struct usb_serial *serial,
         /* send the data out the device on control endpoint */
         this_urb->transfer_buffer_length = sizeof(msg);
 
-        this_urb->dev = serial->dev;
         err = usb_submit_urb(this_urb, GFP_ATOMIC);
         if (err != 0)
                 dbg("%s - usb_submit_urb(setup) failed (%d)", __func__, err);
@@ -2561,7 +2474,6 @@ static int keyspan_usa67_send_setup(struct usb_serial *serial,
 
         /* send the data out the device on control endpoint */
         this_urb->transfer_buffer_length = sizeof(msg);
-        this_urb->dev = serial->dev;
 
         err = usb_submit_urb(this_urb, GFP_ATOMIC);
         if (err != 0)
@@ -2650,14 +2562,12 @@ static int keyspan_startup(struct usb_serial *serial)
         keyspan_setup_urbs(serial);
 
         if (s_priv->instat_urb != NULL) {
-                s_priv->instat_urb->dev = serial->dev;
                 err = usb_submit_urb(s_priv->instat_urb, GFP_KERNEL);
                 if (err != 0)
                         dbg("%s - submit instat urb failed %d", __func__,
                                 err);
         }
         if (s_priv->indat_urb != NULL) {
-                s_priv->indat_urb->dev = serial->dev;
                 err = usb_submit_urb(s_priv->indat_urb, GFP_KERNEL);
                 if (err != 0)
                         dbg("%s - submit indat urb failed %d", __func__,
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index d5c0c6ab496..a40615674a6 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -12,59 +12,6 @@
  *
  * See Documentation/usb/usb-serial.txt for more information on using this
  * driver
- *
- * (09/07/2001) gkh
- *      cleaned up the Xircom support.  Added ids for Entregra device which is
- *      the same as the Xircom device.  Enabled the code to be compiled for
- *      either Xircom or Keyspan devices.
- *
- * (08/11/2001) Cristian M. Craciunescu
- *      support for Xircom PGSDB9
- *
- * (05/31/2001) gkh
- *      switched from using spinlock to a semaphore, which fixes lots of
- *      problems.
- *
- * (04/08/2001) gb
- *      Identify version on module load.
- *
- * (11/01/2000) Adam J. Richter
- *      usb_device_id table support
- *
- * (10/05/2000) gkh
- *      Fixed bug with urb->dev not being set properly, now that the usb
- *      core needs it.
- *
- * (08/28/2000) gkh
- *      Added locks for SMP safeness.
- *      Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
- *      than once.
- *
- * (07/20/2000) borchers
- *      - keyspan_pda_write no longer sleeps if it is called on interrupt time;
- *        PPP and the line discipline with stty echo on can call write on
- *        interrupt time and this would cause an oops if write slept
- *      - if keyspan_pda_write is in an interrupt, it will not call
- *        usb_control_msg (which sleeps) to query the room in the device
- *        buffer, it simply uses the current room value it has
- *      - if the urb is busy or if it is throttled keyspan_pda_write just
- *        returns 0, rather than sleeping to wait for this to change; the
- *        write_chan code in n_tty.c will sleep if needed before calling
- *        keyspan_pda_write again
- *      - if the device needs to be unthrottled, write now queues up the
- *        call to usb_control_msg (which sleeps) to unthrottle the device
- *      - the wakeups from keyspan_pda_write_bulk_callback are queued rather
- *        than done directly from the callback to avoid the race in write_chan
- *      - keyspan_pda_chars_in_buffer also indicates its buffer is full if the
- *        urb status is -EINPROGRESS, meaning it cannot write at the moment
- *
- * (07/19/2000) gkh
- *      Added module_init and module_exit functions to handle the fact that this
- *      driver is a loadable module now.
- *
- * (03/26/2000) gkh
- *      Split driver up into device specific pieces.
- *
  */
 
 
@@ -290,7 +237,6 @@ static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
         struct usb_serial_port *port = tty->driver_data;
         /* just restart the receive interrupt URB */
         dbg("keyspan_pda_rx_unthrottle port %d", port->number);
-        port->interrupt_in_urb->dev = port->serial->dev;
         if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
                 dbg(" usb_submit_urb(read urb) failed");
 }
@@ -532,11 +478,11 @@ static int keyspan_pda_write(struct tty_struct *tty,
            the device is full (wait until it says there is room)
         */
         spin_lock_bh(&port->lock);
-        if (port->write_urb_busy || priv->tx_throttled) {
+        if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) {
                 spin_unlock_bh(&port->lock);
                 return 0;
         }
-        port->write_urb_busy = 1;
+        clear_bit(0, &port->write_urbs_free);
         spin_unlock_bh(&port->lock);
 
         /* At this point the URB is in our control, nobody else can submit it
@@ -598,7 +544,6 @@ static int keyspan_pda_write(struct tty_struct *tty,
 
                 priv->tx_room -= count;
 
-                port->write_urb->dev = port->serial->dev;
                 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
                 if (rc) {
                         dbg(" usb_submit_urb(write bulk) failed");
@@ -618,7 +563,7 @@ static int keyspan_pda_write(struct tty_struct *tty,
         rc = count;
 exit:
         if (rc < 0)
-                port->write_urb_busy = 0;
+                set_bit(0, &port->write_urbs_free);
         return rc;
 }
 
@@ -628,7 +573,7 @@ static void keyspan_pda_write_bulk_callback(struct urb *urb)
         struct usb_serial_port *port = urb->context;
         struct keyspan_pda_private *priv;
 
-        port->write_urb_busy = 0;
+        set_bit(0, &port->write_urbs_free);
         priv = usb_get_serial_port_data(port);
 
         /* queue up a wakeup at scheduler time */
@@ -661,7 +606,7 @@ static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
            n_tty.c:normal_poll() ) that we're not writeable. */
 
         spin_lock_irqsave(&port->lock, flags);
-        if (port->write_urb_busy || priv->tx_throttled)
+        if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled)
                 ret = 256;
         spin_unlock_irqrestore(&port->lock, flags);
         return ret;
@@ -717,7 +662,6 @@ static int keyspan_pda_open(struct tty_struct *tty,
         priv->tx_throttled = *room ? 0 : 1;
 
         /*Start reading from the device*/
-        port->interrupt_in_urb->dev = serial->dev;
         rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (rc) {
                 dbg("%s - usb_submit_urb(read int) failed", __func__);
diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c
index ddd146300dd..5d3beeeb5fd 100644
--- a/drivers/usb/serial/kobil_sct.c
+++ b/drivers/usb/serial/kobil_sct.c
@@ -20,18 +20,6 @@
  *
  * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
  * (Adapter K), B1 Professional and KAAN Professional (Adapter B)
- *
- * (21/05/2004) tw
- *      Fix bug with P'n'P readers
- *
- * (28/05/2003) tw
- *      Add support for KAAN SIM
- *
- * (12/09/2002) tw
- *      Adapted to 2.5.
- *
- * (11/08/2002) tw
- *      Initial version.
  */
 
 
@@ -231,9 +219,6 @@ static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port)
         dbg("%s - port %d", __func__, port->number);
         priv = usb_get_serial_port_data(port);
 
-        /* someone sets the dev to 0 if the close method has been called */
-        port->interrupt_in_urb->dev = port->serial->dev;
-
         /* allocate memory for transfer buffer */
         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
         if (!transfer_buffer)
@@ -393,8 +378,6 @@ static void kobil_read_int_callback(struct urb *urb)
                 tty_flip_buffer_push(tty);
         }
         tty_kref_put(tty);
-        /* someone sets the dev to 0 if the close method has been called */
-        port->interrupt_in_urb->dev = port->serial->dev;
 
         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
         dbg("%s - port %d Send read URB returns: %i",
@@ -475,17 +458,9 @@ static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
                 priv->filled = 0;
                 priv->cur_pos = 0;
 
-                /* someone sets the dev to 0 if the close method
-                   has been called */
-                port->interrupt_in_urb->dev = port->serial->dev;
-
                 /* start reading (except TWIN and KAAN SIM) */
                 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
-                        /* someone sets the dev to 0 if the close method has
-                           been called */
-                        port->interrupt_in_urb->dev = port->serial->dev;
-
                         result = usb_submit_urb(port->interrupt_in_urb,
                                                                 GFP_NOIO);
                         dbg("%s - port %d Send read URB returns: %i",
diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c
index ba0d28727cc..a975bb80303 100644
--- a/drivers/usb/serial/mct_u232.c
+++ b/drivers/usb/serial/mct_u232.c
@@ -19,50 +19,6 @@
  *   DTR/RTS signal handling may be incomplete or incorrect. I have mainly
  *   implemented what I have seen with SniffUSB or found in belkin_sa.c.
  *   For further TODOs check also belkin_sa.c.
- *
- * TEST STATUS:
- *   Basic tests have been performed with minicom/zmodem transfers and
- *   modem dialing under Linux 2.4.0-test10 (for me it works fine).
- *
- * 04-Nov-2003 Bill Marr <marr at flex dot com>
- *   - Mimic Windows driver by sending 2 USB 'device request' messages
- *     following normal 'baud rate change' message.  This allows data to be
- *     transmitted to RS-232 devices which don't assert the 'CTS' signal.
- *
- * 10-Nov-2001 Wolfgang Grandegger
- *   - Fixed an endianess problem with the baudrate selection for PowerPC.
- *
- * 06-Dec-2001 Martin Hamilton <martinh@gnu.org>
- *   - Added support for the Belkin F5U109 DB9 adaptor
- *
- * 30-May-2001 Greg Kroah-Hartman
- *   - switched from using spinlock to a semaphore, which fixes lots of
- *     problems.
- *
- * 04-May-2001 Stelian Pop
- *   - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes
- *     instead of the device reported 32 (using 32 bytes causes many data
- *     loss, Windows driver uses 16 too).
- *
- * 02-May-2001 Stelian Pop
- *   - Fixed the baud calculation for Sitecom U232-P25 model
- *
- * 08-Apr-2001 gb
- *   - Identify version on module load.
- *
- * 06-Jan-2001 Cornel Ciocirlan
- *   - Added support for Sitecom U232-P25 model (Product Id 0x0230)
- *   - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200)
- *
- * 29-Nov-2000 Greg Kroah-Hartman
- *   - Added device id table to fit with 2.4.0-test11 structure.
- *   - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed
- *     (lots of things will change if/when the usb-serial core changes to
- *     handle these issues.
- *
- * 27-Nov-2000 Wolfgang Grandegge
- *   A version for kernel 2.4.0-test10 released to the Linux community
- *   (via linux-usb-devel).
  */
 
 #include <linux/kernel.h>
@@ -526,7 +482,6 @@ static int  mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port)
         mct_u232_msr_to_state(&priv->control_state, priv->last_msr);
         spin_unlock_irqrestore(&priv->lock, flags);
 
-        port->read_urb->dev = port->serial->dev;
         retval = usb_submit_urb(port->read_urb, GFP_KERNEL);
         if (retval) {
                 dev_err(&port->dev,
@@ -535,7 +490,6 @@ static int  mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port)
                 goto error;
         }
 
-        port->interrupt_in_urb->dev = port->serial->dev;
         retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (retval) {
                 usb_kill_urb(port->read_urb);
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index 3524a105d04..19d112f51b9 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -939,14 +939,7 @@ static void mos7720_bulk_in_callback(struct urb *urb)
         }
         tty_kref_put(tty);
 
-        if (!port->read_urb) {
-                dbg("URB KILLED !!!");
-                return;
-        }
-
         if (port->read_urb->status != -EINPROGRESS) {
-                port->read_urb->dev = port->serial->dev;
-
                 retval = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                 if (retval)
                         dbg("usb_submit_urb(read bulk) failed, retval = %d",
@@ -1014,7 +1007,6 @@ static int mos77xx_calc_num_ports(struct usb_serial *serial)
 static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
 {
         struct usb_serial *serial;
-        struct usb_serial_port *port0;
         struct urb *urb;
         struct moschip_port *mos7720_port;
         int response;
@@ -1029,8 +1021,6 @@ static int mos7720_open(struct tty_struct *tty, struct usb_serial_port *port)
         if (mos7720_port == NULL)
                 return -ENODEV;
 
-        port0 = serial->port[0];
-
         usb_clear_halt(serial->dev, port->write_urb->pipe);
         usb_clear_halt(serial->dev, port->read_urb->pipe);
 
@@ -1735,8 +1725,6 @@ static void change_port_settings(struct tty_struct *tty,
         write_mos_reg(serial, port_number, IER, 0x0c);
 
         if (port->read_urb->status != -EINPROGRESS) {
-                port->read_urb->dev = serial->dev;
-
                 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                 if (status)
                         dbg("usb_submit_urb(read bulk) failed, status = %d",
@@ -1786,13 +1774,7 @@ static void mos7720_set_termios(struct tty_struct *tty,
         /* change the port settings to the new ones specified */
         change_port_settings(tty, mos7720_port, old_termios);
 
-        if (!port->read_urb) {
-                dbg("%s", "URB KILLED !!!!!");
-                return;
-        }
-
         if (port->read_urb->status != -EINPROGRESS) {
-                port->read_urb->dev = serial->dev;
                 status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                 if (status)
                         dbg("usb_submit_urb(read bulk) failed, status = %d",
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index c72abd52498..55cfd6265b9 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -792,8 +792,6 @@ static void mos7840_bulk_in_callback(struct urb *urb)
         }
 
 
-        mos7840_port->read_urb->dev = serial->dev;
-
         mos7840_port->read_urb_busy = true;
         retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
 
@@ -2058,7 +2056,6 @@ static void mos7840_change_port_settings(struct tty_struct *tty,
         mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
 
         if (mos7840_port->read_urb_busy == false) {
-                mos7840_port->read_urb->dev = serial->dev;
                 mos7840_port->read_urb_busy = true;
                 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
                 if (status) {
@@ -2130,7 +2127,6 @@ static void mos7840_set_termios(struct tty_struct *tty,
         }
 
         if (mos7840_port->read_urb_busy == false) {
-                mos7840_port->read_urb->dev = serial->dev;
                 mos7840_port->read_urb_busy = true;
                 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
                 if (status) {
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index 60f38d5e64f..45a8c55881d 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -9,31 +9,6 @@
  * driver
  *
  * Please report both successes and troubles to the author at omninet@kroah.com
- *
- * (05/30/2001) gkh
- *      switched from using spinlock to a semaphore, which fixes lots of
- *      problems.
- *
- * (04/08/2001) gb
- *      Identify version on module load.
- *
- * (11/01/2000) Adam J. Richter
- *      usb_device_id table support
- *
- * (10/05/2000) gkh
- *      Fixed bug with urb->dev not being set properly, now that the usb
- *      core needs it.
- *
- * (08/28/2000) gkh
- *      Added locks for SMP safeness.
- *      Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
- *      than once.
- *      Fixed potential race in omninet_write_bulk_callback
- *
- * (07/19/2000) gkh
- *      Added module_init and module_exit functions to handle the fact that this
- *      driver is a loadable module now.
- *
  */
 
 #include <linux/kernel.h>
@@ -44,7 +19,6 @@
 #include <linux/tty_driver.h>
 #include <linux/tty_flip.h>
 #include <linux/module.h>
-#include <linux/spinlock.h>
 #include <linux/uaccess.h>
 #include <linux/usb.h>
 #include <linux/usb/serial.h>
@@ -174,12 +148,6 @@ static int omninet_open(struct tty_struct *tty, struct usb_serial_port *port)
         tty_port_tty_set(&wport->port, tty);
 
         /* Start reading from the device */
-        usb_fill_bulk_urb(port->read_urb, serial->dev,
-                        usb_rcvbulkpipe(serial->dev,
-                                port->bulk_in_endpointAddress),
-                        port->read_urb->transfer_buffer,
-                        port->read_urb->transfer_buffer_length,
-                        omninet_read_bulk_callback, port);
         result = usb_submit_urb(port->read_urb, GFP_KERNEL);
         if (result)
                 dev_err(&port->dev,
@@ -236,11 +204,6 @@ static void omninet_read_bulk_callback(struct urb *urb)
         }
 
         /* Continue trying to always read  */
-        usb_fill_bulk_urb(urb, port->serial->dev,
-                        usb_rcvbulkpipe(port->serial->dev,
-                                        port->bulk_in_endpointAddress),
-                        urb->transfer_buffer, urb->transfer_buffer_length,
-                        omninet_read_bulk_callback, port);
         result = usb_submit_urb(urb, GFP_ATOMIC);
         if (result)
                 dev_err(&port->dev,
@@ -267,14 +230,10 @@ static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
                 return 0;
         }
 
-        spin_lock_bh(&wport->lock);
-        if (wport->write_urb_busy) {
-                spin_unlock_bh(&wport->lock);
+        if (!test_and_clear_bit(0, &port->write_urbs_free)) {
                 dbg("%s - already writing", __func__);
                 return 0;
         }
-        wport->write_urb_busy = 1;
-        spin_unlock_bh(&wport->lock);
 
         count = (count > OMNINET_BULKOUTSIZE) ? OMNINET_BULKOUTSIZE : count;
 
@@ -292,10 +251,9 @@ static int omninet_write(struct tty_struct *tty, struct usb_serial_port *port,
         /* send the data out the bulk port, always 64 bytes */
         wport->write_urb->transfer_buffer_length = 64;
 
-        wport->write_urb->dev = serial->dev;
         result = usb_submit_urb(wport->write_urb, GFP_ATOMIC);
         if (result) {
-                wport->write_urb_busy = 0;
+                set_bit(0, &wport->write_urbs_free);
                 dev_err(&port->dev,
                         "%s - failed submitting write urb, error %d\n",
                         __func__, result);
@@ -314,8 +272,7 @@ static int omninet_write_room(struct tty_struct *tty)
 
         int room = 0; /* Default: no room */
 
-        /* FIXME: no consistent locking for write_urb_busy */
-        if (wport->write_urb_busy)
+        if (test_bit(0, &wport->write_urbs_free))
                 room = wport->bulk_out_size - OMNINET_HEADERLEN;
 
         dbg("%s - returns %d", __func__, room);
@@ -332,7 +289,7 @@ static void omninet_write_bulk_callback(struct urb *urb)
 
         dbg("%s - port %0x", __func__, port->number);
 
-        port->write_urb_busy = 0;
+        set_bit(0, &port->write_urbs_free);
         if (status) {
                 dbg("%s - nonzero write bulk status received: %d",
                     __func__, status);
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index c248a914743..691f57a9d71 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -384,7 +384,6 @@ static void opticon_unthrottle(struct tty_struct *tty)
         priv->actually_throttled = false;
         spin_unlock_irqrestore(&priv->lock, flags);
 
-        priv->bulk_read_urb->dev = port->serial->dev;
         if (was_throttled) {
                 result = usb_submit_urb(priv->bulk_read_urb, GFP_ATOMIC);
                 if (result)
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 6dd64534fad..c96b6b6509f 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -476,6 +476,10 @@ static void option_instat_callback(struct urb *urb);
 #define VIETTEL_VENDOR_ID                       0x2262
 #define VIETTEL_PRODUCT_VT1000                  0x0002
 
+/* ZD Incorporated */
+#define ZD_VENDOR_ID                            0x0685
+#define ZD_PRODUCT_7000                         0x7000
+
 /* some devices interfaces need special handling due to a number of reasons */
 enum option_blacklist_reason {
                 OPTION_BLACKLIST_NONE = 0,
@@ -1178,6 +1182,7 @@ static const struct usb_device_id option_ids[] = {
         { USB_DEVICE(YUGA_VENDOR_ID, YUGA_PRODUCT_CLU528) },
         { USB_DEVICE(YUGA_VENDOR_ID, YUGA_PRODUCT_CLU526) },
         { USB_DEVICE_AND_INTERFACE_INFO(VIETTEL_VENDOR_ID, VIETTEL_PRODUCT_VT1000, 0xff, 0xff, 0xff) },
+        { USB_DEVICE_AND_INTERFACE_INFO(ZD_VENDOR_ID, ZD_PRODUCT_7000, 0xff, 0xff, 0xff) },
         { } /* Terminating entry */
 };
 MODULE_DEVICE_TABLE(usb, option_ids);
diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c
index 4c29e6c2bda..2161d1c3c08 100644
--- a/drivers/usb/serial/oti6858.c
+++ b/drivers/usb/serial/oti6858.c
@@ -264,7 +264,6 @@ static void setup_line(struct work_struct *work)
         spin_unlock_irqrestore(&priv->lock, flags);
 
         dbg("%s(): submitting interrupt urb", __func__);
-        port->interrupt_in_urb->dev = port->serial->dev;
         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (result != 0) {
                 dev_err(&port->dev, "%s(): usb_submit_urb() failed"
@@ -321,7 +320,6 @@ static void send_data(struct work_struct *work)
                 priv->flags.write_urb_in_use = 0;
 
                 dbg("%s(): submitting interrupt urb", __func__);
-                port->interrupt_in_urb->dev = port->serial->dev;
                 result = usb_submit_urb(port->interrupt_in_urb, GFP_NOIO);
                 if (result != 0) {
                         dev_err(&port->dev, "%s(): usb_submit_urb() failed"
@@ -334,7 +332,6 @@ static void send_data(struct work_struct *work)
                                         port->write_urb->transfer_buffer,
                                         count, &port->lock);
         port->write_urb->transfer_buffer_length = count;
-        port->write_urb->dev = port->serial->dev;
         result = usb_submit_urb(port->write_urb, GFP_NOIO);
         if (result != 0) {
                 dev_err(&port->dev, "%s(): usb_submit_urb() failed"
@@ -583,13 +580,12 @@ static int oti6858_open(struct tty_struct *tty, struct usb_serial_port *port)
         kfree(buf);
 
         dbg("%s(): submitting interrupt urb", __func__);
-        port->interrupt_in_urb->dev = serial->dev;
         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (result != 0) {
                 dev_err(&port->dev, "%s(): usb_submit_urb() failed"
                                " with error %d\n", __func__, result);
                 oti6858_close(port);
-                return -EPROTO;
+                return result;
         }
 
         /* setup termios */
@@ -837,7 +833,6 @@ static void oti6858_read_int_callback(struct urb *urb)
         if (can_recv) {
                 int result;
 
-                port->read_urb->dev = port->serial->dev;
                 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
                 if (result != 0) {
                         priv->flags.read_urb_in_use = 0;
@@ -866,7 +861,6 @@ static void oti6858_read_int_callback(struct urb *urb)
                 int result;
 
 /*              dbg("%s(): submitting interrupt urb", __func__); */
-                urb->dev = port->serial->dev;
                 result = usb_submit_urb(urb, GFP_ATOMIC);
                 if (result != 0) {
                         dev_err(&urb->dev->dev,
@@ -894,18 +888,6 @@ static void oti6858_read_bulk_callback(struct urb *urb)
         spin_unlock_irqrestore(&priv->lock, flags);
 
         if (status != 0) {
-                /*
-                if (status == -EPROTO) {
-                        * PL2303 mysteriously fails with -EPROTO reschedule
-                           the read *
-                        dbg("%s - caught -EPROTO, resubmitting the urb",
-                                                                __func__);
-                        result = usb_submit_urb(urb, GFP_ATOMIC);
-                        if (result)
-                                dev_err(&urb->dev->dev, "%s - failed resubmitting read urb, error %d\n", __func__, result);
-                        return;
-                }
-                */
                 dbg("%s(): unable to handle the error, exiting", __func__);
                 return;
         }
@@ -918,7 +900,6 @@ static void oti6858_read_bulk_callback(struct urb *urb)
         tty_kref_put(tty);
 
         /* schedule the interrupt urb */
-        port->interrupt_in_urb->dev = port->serial->dev;
         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
         if (result != 0 && result != -EPERM) {
                 dev_err(&port->dev, "%s(): usb_submit_urb() failed,"
@@ -955,7 +936,6 @@ static void oti6858_write_bulk_callback(struct urb *urb)
                 dbg("%s(): overflow in write", __func__);
 
                 port->write_urb->transfer_buffer_length = 1;
-                port->write_urb->dev = port->serial->dev;
                 result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
                 if (result) {
                         dev_err(&port->dev, "%s(): usb_submit_urb() failed,"
@@ -968,7 +948,6 @@ static void oti6858_write_bulk_callback(struct urb *urb)
         priv->flags.write_urb_in_use = 0;
 
         /* schedule the interrupt urb if we are still open */
-        port->interrupt_in_urb->dev = port->serial->dev;
         dbg("%s(): submitting interrupt urb", __func__);
         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
         if (result != 0) {
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index fc2d66f7f4e..329295615d0 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -502,21 +502,20 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
         if (tty)
                 pl2303_set_termios(tty, port, &tmp_termios);
 
-        dbg("%s - submitting read urb", __func__);
-        result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
-        if (result) {
-                pl2303_close(port);
-                return -EPROTO;
-        }
-
         dbg("%s - submitting interrupt urb", __func__);
         result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
         if (result) {
                 dev_err(&port->dev, "%s - failed submitting interrupt urb,"
                         " error %d\n", __func__, result);
-                pl2303_close(port);
-                return -EPROTO;
+                return result;
         }
+
+        result = usb_serial_generic_open(tty, port);
+        if (result) {
+                usb_kill_urb(port->interrupt_in_urb);
+                return result;
+        }
+
         port->port.drain_delay = 256;
         return 0;
 }
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index b18179bda0d..f2485429172 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -681,7 +681,6 @@ static void sierra_instat_callback(struct urb *urb)
         /* Resubmit urb so we continue receiving IRQ data */
         if (status != -ESHUTDOWN && status != -ENOENT) {
                 usb_mark_last_busy(serial->dev);
-                urb->dev = serial->dev;
                 err = usb_submit_urb(urb, GFP_ATOMIC);
                 if (err && err != -EPERM)
                         dev_err(&port->dev, "%s: resubmit intr urb "
diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index 7096f799b07..c70cc012d03 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -182,7 +182,6 @@ static void symbol_unthrottle(struct tty_struct *tty)
         priv->actually_throttled = false;
         spin_unlock_irq(&priv->lock);
 
-        priv->int_urb->dev = port->serial->dev;
         if (was_throttled) {
                 result = usb_submit_urb(priv->int_urb, GFP_KERNEL);
                 if (result)
diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c
index ea8445689c8..4af21f46096 100644
--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -535,9 +535,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
                         status = -EINVAL;
                         goto release_lock;
                 }
-                urb->complete = ti_interrupt_callback;
                 urb->context = tdev;
-                urb->dev = dev;
                 status = usb_submit_urb(urb, GFP_KERNEL);
                 if (status) {
                         dev_err(&port->dev,
@@ -619,9 +617,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
                 goto unlink_int_urb;
         }
         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
-        urb->complete = ti_bulk_in_callback;
         urb->context = tport;
-        urb->dev = dev;
         status = usb_submit_urb(urb, GFP_KERNEL);
         if (status) {
                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
@@ -1236,12 +1232,11 @@ static void ti_bulk_in_callback(struct urb *urb)
 exit:
         /* continue to read unless stopping */
         spin_lock(&tport->tp_lock);
-        if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
-                urb->dev = port->serial->dev;
+        if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
                 retval = usb_submit_urb(urb, GFP_ATOMIC);
-        } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
+        else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
-        }
+
         spin_unlock(&tport->tp_lock);
         if (retval)
                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
@@ -1574,9 +1569,7 @@ static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
                 urb = tport->tp_port->read_urb;
                 spin_unlock_irqrestore(&tport->tp_lock, flags);
-                urb->complete = ti_bulk_in_callback;
                 urb->context = tport;
-                urb->dev = tport->tp_port->serial->dev;
                 status = usb_submit_urb(urb, GFP_KERNEL);
         } else  {
                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index cc274fdf262..ce6c1a65a54 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -50,7 +50,7 @@ static struct usb_driver usb_serial_driver = {
         .disconnect =   usb_serial_disconnect,
         .suspend =      usb_serial_suspend,
         .resume =       usb_serial_resume,
-        .no_dynamic_id =        1,
+        .no_dynamic_id =        1,
         .supports_autosuspend = 1,
 };
 
@@ -260,6 +260,10 @@ static int serial_activate(struct tty_port *tport, struct tty_struct *tty)
         else
                 retval = port->serial->type->open(tty, port);
         mutex_unlock(&serial->disc_mutex);
+
+        if (retval < 0)
+                retval = usb_translate_errors(retval);
+
         return retval;
 }
 
@@ -360,7 +364,8 @@ static int serial_write(struct tty_struct *tty, const unsigned char *buf,
 
         /* pass on to the driver specific version of this function */
         retval = port->serial->type->write(tty, port, buf, count);
-
+        if (retval < 0)
+                retval = usb_translate_errors(retval);
 exit:
         return retval;
 }
@@ -562,8 +567,8 @@ static void kill_traffic(struct usb_serial_port *port)
 {
         int i;
 
-        usb_kill_urb(port->read_urb);
-        usb_kill_urb(port->write_urb);
+        for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
+                usb_kill_urb(port->read_urbs[i]);
         for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
                 usb_kill_urb(port->write_urbs[i]);
         /*
@@ -595,17 +600,17 @@ static void port_release(struct device *dev)
         kill_traffic(port);
         cancel_work_sync(&port->work);
 
-        usb_free_urb(port->read_urb);
-        usb_free_urb(port->write_urb);
         usb_free_urb(port->interrupt_in_urb);
         usb_free_urb(port->interrupt_out_urb);
+        for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
+                usb_free_urb(port->read_urbs[i]);
+                kfree(port->bulk_in_buffers[i]);
+        }
         for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {
                 usb_free_urb(port->write_urbs[i]);
                 kfree(port->bulk_out_buffers[i]);
         }
         kfifo_free(&port->write_fifo);
-        kfree(port->bulk_in_buffer);
-        kfree(port->bulk_out_buffer);
         kfree(port->interrupt_in_buffer);
         kfree(port->interrupt_out_buffer);
         kfree(port);
@@ -686,16 +691,18 @@ static int serial_carrier_raised(struct tty_port *port)
 {
         struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
         struct usb_serial_driver *drv = p->serial->type;
+
         if (drv->carrier_raised)
                 return drv->carrier_raised(p);
         /* No carrier control - don't block */
-        return 1;       
+        return 1;
 }
 
 static void serial_dtr_rts(struct tty_port *port, int on)
 {
         struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
         struct usb_serial_driver *drv = p->serial->type;
+
         if (drv->dtr_rts)
                 drv->dtr_rts(p, on);
 }
@@ -724,6 +731,7 @@ int usb_serial_probe(struct usb_interface *interface,
         unsigned int minor;
         int buffer_size;
         int i;
+        int j;
         int num_interrupt_in = 0;
         int num_interrupt_out = 0;
         int num_bulk_in = 0;
@@ -906,38 +914,41 @@ int usb_serial_probe(struct usb_interface *interface,
         for (i = 0; i < num_bulk_in; ++i) {
                 endpoint = bulk_in_endpoint[i];
                 port = serial->port[i];
-                port->read_urb = usb_alloc_urb(0, GFP_KERNEL);
-                if (!port->read_urb) {
-                        dev_err(&interface->dev, "No free urbs available\n");
-                        goto probe_error;
-                }
                 buffer_size = max_t(int, serial->type->bulk_in_size,
                                 usb_endpoint_maxp(endpoint));
                 port->bulk_in_size = buffer_size;
                 port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
-                port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
-                if (!port->bulk_in_buffer) {
-                        dev_err(&interface->dev,
+
+                for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) {
+                        set_bit(j, &port->read_urbs_free);
+                        port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
+                        if (!port->read_urbs[j]) {
+                                dev_err(&interface->dev,
+                                                "No free urbs available\n");
+                                goto probe_error;
+                        }
+                        port->bulk_in_buffers[j] = kmalloc(buffer_size,
+                                                                GFP_KERNEL);
+                        if (!port->bulk_in_buffers[j]) {
+                                dev_err(&interface->dev,
                                         "Couldn't allocate bulk_in_buffer\n");
-                        goto probe_error;
-                }
-                usb_fill_bulk_urb(port->read_urb, dev,
-                                usb_rcvbulkpipe(dev,
+                                goto probe_error;
+                        }
+                        usb_fill_bulk_urb(port->read_urbs[j], dev,
+                                        usb_rcvbulkpipe(dev,
                                                 endpoint->bEndpointAddress),
-                                port->bulk_in_buffer, buffer_size,
-                                serial->type->read_bulk_callback, port);
+                                        port->bulk_in_buffers[j], buffer_size,
+                                        serial->type->read_bulk_callback,
+                                        port);
+                }
+
+                port->read_urb = port->read_urbs[0];
+                port->bulk_in_buffer = port->bulk_in_buffers[0];
         }
 
         for (i = 0; i < num_bulk_out; ++i) {
-                int j;
-
                 endpoint = bulk_out_endpoint[i];
                 port = serial->port[i];
-                port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
-                if (!port->write_urb) {
-                        dev_err(&interface->dev, "No free urbs available\n");
-                        goto probe_error;
-                }
                 if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
                         goto probe_error;
                 buffer_size = serial->type->bulk_out_size;
@@ -945,17 +956,7 @@ int usb_serial_probe(struct usb_interface *interface,
                         buffer_size = usb_endpoint_maxp(endpoint);
                 port->bulk_out_size = buffer_size;
                 port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
-                port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
-                if (!port->bulk_out_buffer) {
-                        dev_err(&interface->dev,
-                                        "Couldn't allocate bulk_out_buffer\n");
-                        goto probe_error;
-                }
-                usb_fill_bulk_urb(port->write_urb, dev,
-                                usb_sndbulkpipe(dev,
-                                        endpoint->bEndpointAddress),
-                                port->bulk_out_buffer, buffer_size,
-                                serial->type->write_bulk_callback, port);
+
                 for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
                         set_bit(j, &port->write_urbs_free);
                         port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
@@ -978,6 +979,9 @@ int usb_serial_probe(struct usb_interface *interface,
                                         serial->type->write_bulk_callback,
                                         port);
                 }
+
+                port->write_urb = port->write_urbs[0];
+                port->bulk_out_buffer = port->bulk_out_buffers[0];
         }
 
         if (serial->type->read_int_callback) {
@@ -1196,7 +1200,7 @@ static const struct tty_operations serial_ops = {
         .open =                 serial_open,
         .close =                serial_close,
         .write =                serial_write,
-        .hangup =               serial_hangup,
+        .hangup =               serial_hangup,
         .write_room =           serial_write_room,
         .ioctl =                serial_ioctl,
         .set_termios =          serial_set_termios,
@@ -1206,9 +1210,9 @@ static const struct tty_operations serial_ops = {
         .chars_in_buffer =      serial_chars_in_buffer,
         .tiocmget =             serial_tiocmget,
         .tiocmset =             serial_tiocmset,
-        .get_icount =           serial_get_icount,
-        .cleanup =              serial_cleanup,
-        .install =              serial_install,
+        .get_icount =           serial_get_icount,
+        .cleanup =              serial_cleanup,
+        .install =              serial_install,
         .proc_fops =            &serial_proc_fops,
 };
 
@@ -1237,7 +1241,7 @@ static int __init usb_serial_init(void)
 
         usb_serial_tty_driver->owner = THIS_MODULE;
         usb_serial_tty_driver->driver_name = "usbserial";
-        usb_serial_tty_driver->name =   "ttyUSB";
+        usb_serial_tty_driver->name = "ttyUSB";
         usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
         usb_serial_tty_driver->minor_start = 0;
         usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
@@ -1336,7 +1340,6 @@ static void fixup_generic(struct usb_serial_driver *device)
 
 int usb_serial_register(struct usb_serial_driver *driver)
 {
-        /* must be called with BKL held */
         int retval;
 
         if (usb_disabled())
@@ -1374,7 +1377,6 @@ EXPORT_SYMBOL_GPL(usb_serial_register);
 
 void usb_serial_deregister(struct usb_serial_driver *device)
 {
-        /* must be called with BKL held */
         printk(KERN_INFO "USB Serial deregistering driver %s\n",
                device->description);
         mutex_lock(&table_lock);
diff --git a/drivers/usb/serial/usb_debug.c b/drivers/usb/serial/usb_debug.c
index 95a82148ee8..9b632e75321 100644
--- a/drivers/usb/serial/usb_debug.c
+++ b/drivers/usb/serial/usb_debug.c
@@ -40,7 +40,7 @@ static struct usb_driver debug_driver = {
         .probe =        usb_serial_probe,
         .disconnect =   usb_serial_disconnect,
         .id_table =     id_table,
-        .no_dynamic_id =        1,
+        .no_dynamic_id =        1,
 };
 
 /* This HW really does not support a serial break, so one will be
@@ -54,19 +54,18 @@ static void usb_debug_break_ctl(struct tty_struct *tty, int break_state)
         usb_serial_generic_write(tty, port, USB_DEBUG_BRK, USB_DEBUG_BRK_SIZE);
 }
 
-static void usb_debug_read_bulk_callback(struct urb *urb)
+static void usb_debug_process_read_urb(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) {
+                memcmp(urb->transfer_buffer, USB_DEBUG_BRK,
+                                                USB_DEBUG_BRK_SIZE) == 0) {
                 usb_serial_handle_break(port);
-                usb_serial_generic_submit_read_urb(port, GFP_ATOMIC);
                 return;
         }
 
-        usb_serial_generic_read_bulk_callback(urb);
+        usb_serial_generic_process_read_urb(urb);
 }
 
 static struct usb_serial_driver debug_device = {
@@ -79,7 +78,7 @@ static struct usb_serial_driver debug_device = {
         .num_ports =            1,
         .bulk_out_size =        USB_DEBUG_MAX_PACKET_SIZE,
         .break_ctl =            usb_debug_break_ctl,
-        .read_bulk_callback =   usb_debug_read_bulk_callback,
+        .process_read_urb =     usb_debug_process_read_urb,
 };
 
 static int __init debug_init(void)
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index 5b073bcc807..11af903cb09 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -14,57 +14,6 @@
  *
  * See Documentation/usb/usb-serial.txt for more information on using this
  * driver
- *
- * (10/09/2002) Stuart MacDonald (stuartm@connecttech.com)
- *      Upgrade to full working driver
- *
- * (05/30/2001) gkh
- *      switched from using spinlock to a semaphore, which fixes lots of
- *      problems.
- *
- * (04/08/2001) gb
- *      Identify version on module load.
- *
- * 2001_Mar_19 gkh
- *      Fixed MOD_INC and MOD_DEC logic, the ability to open a port more
- *      than once, and the got the proper usb_device_id table entries so
- *      the driver works again.
- *
- * (11/01/2000) Adam J. Richter
- *      usb_device_id table support
- *
- * (10/05/2000) gkh
- *      Fixed bug with urb->dev not being set properly, now that the usb
- *      core needs it.
- *
- * (10/03/2000) smd
- *      firmware is improved to guard against crap sent to device
- *      firmware now replies CMD_FAILURE on bad things
- *      read_callback fix you provided for private info struct
- *      command_finished now indicates success or fail
- *      setup_port struct now packed to avoid gcc padding
- *      firmware uses 1 based port numbering, driver now handles that
- *
- * (09/11/2000) gkh
- *      Removed DEBUG #ifdefs with call to usb_serial_debug_data
- *
- * (07/19/2000) gkh
- *      Added module_init and module_exit functions to handle the fact that this
- *      driver is a loadable module now.
- *      Fixed bug with port->minor that was found by Al Borchers
- *
- * (07/04/2000) gkh
- *      Added support for port settings. Baud rate can now be changed. Line
- *      signals are not transferred to and from the tty layer yet, but things
- *      seem to be working well now.
- *
- * (05/04/2000) gkh
- *      First cut at open and close commands. Data can flow through the ports at
- *      default speeds now.
- *
- * (03/26/2000) gkh
- *      Split driver up into device specific pieces.
- *
  */
 
 #include <linux/kernel.h>
@@ -753,7 +702,6 @@ static void whiteheat_close(struct usb_serial_port *port)
 static int whiteheat_write(struct tty_struct *tty,
         struct usb_serial_port *port, const unsigned char *buf, int count)
 {
-        struct usb_serial *serial = port->serial;
         struct whiteheat_private *info = usb_get_serial_port_data(port);
         struct whiteheat_urb_wrap *wrap;
         struct urb *urb;
@@ -789,7 +737,6 @@ static int whiteheat_write(struct tty_struct *tty,
                 usb_serial_debug_data(debug, &port->dev,
                                 __func__, bytes, urb->transfer_buffer);
 
-                urb->dev = serial->dev;
                 urb->transfer_buffer_length = bytes;
                 result = usb_submit_urb(urb, GFP_ATOMIC);
                 if (result) {
@@ -1035,7 +982,6 @@ static void command_port_read_callback(struct urb *urb)
                 dbg("%s - bad reply from firmware", __func__);
 
         /* Continue trying to always read */
-        command_port->read_urb->dev = command_port->serial->dev;
         result = usb_submit_urb(command_port->read_urb, GFP_ATOMIC);
         if (result)
                 dbg("%s - failed resubmitting read urb, error %d",
@@ -1141,7 +1087,6 @@ static int firm_send_command(struct usb_serial_port *port, __u8 command,
         transfer_buffer[0] = command;
         memcpy(&transfer_buffer[1], data, datasize);
         command_port->write_urb->transfer_buffer_length = datasize + 1;
-        command_port->write_urb->dev = port->serial->dev;
         retval = usb_submit_urb(command_port->write_urb, GFP_NOIO);
         if (retval) {
                 dbg("%s - submit urb failed", __func__);
@@ -1362,7 +1307,6 @@ static int start_command_port(struct usb_serial *serial)
                 /* Work around HCD bugs */
                 usb_clear_halt(serial->dev, command_port->read_urb->pipe);
 
-                command_port->read_urb->dev = serial->dev;
                 retval = usb_submit_urb(command_port->read_urb, GFP_KERNEL);
                 if (retval) {
                         dev_err(&serial->dev->dev,
@@ -1410,7 +1354,6 @@ static int start_port_read(struct usb_serial_port *port)
                 list_del(tmp);
                 wrap = list_entry(tmp, struct whiteheat_urb_wrap, list);
                 urb = wrap->urb;
-                urb->dev = port->serial->dev;
                 spin_unlock_irqrestore(&info->lock, flags);
                 retval = usb_submit_urb(urb, GFP_KERNEL);
                 if (retval) {
@@ -1490,7 +1433,6 @@ static void rx_data_softint(struct work_struct *work)
                         sent += tty_insert_flip_string(tty,
                                 urb->transfer_buffer, urb->actual_length);
 
-                urb->dev = port->serial->dev;
                 result = usb_submit_urb(urb, GFP_ATOMIC);
                 if (result) {
                         dev_err(&port->dev,
diff --git a/drivers/usb/storage/alauda.c b/drivers/usb/storage/alauda.c
index 3ca87a82334..51af2fee2ef 100644
--- a/drivers/usb/storage/alauda.c
+++ b/drivers/usb/storage/alauda.c
@@ -139,7 +139,7 @@ static int init_alauda(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id alauda_usb_ids[] = {
+static struct usb_device_id alauda_usb_ids[] = {
 #       include "unusual_alauda.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/cypress_atacb.c b/drivers/usb/storage/cypress_atacb.c
index c7909dfa243..387cbd47acc 100644
--- a/drivers/usb/storage/cypress_atacb.c
+++ b/drivers/usb/storage/cypress_atacb.c
@@ -43,7 +43,7 @@ MODULE_LICENSE("GPL");
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id cypress_usb_ids[] = {
+static struct usb_device_id cypress_usb_ids[] = {
 #       include "unusual_cypress.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/datafab.c b/drivers/usb/storage/datafab.c
index a99be857b79..15d41f2b3d6 100644
--- a/drivers/usb/storage/datafab.c
+++ b/drivers/usb/storage/datafab.c
@@ -88,7 +88,7 @@ static int datafab_determine_lun(struct us_data *us,
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id datafab_usb_ids[] = {
+static struct usb_device_id datafab_usb_ids[] = {
 #       include "unusual_datafab.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/ene_ub6250.c b/drivers/usb/storage/ene_ub6250.c
index b0a1687ca94..a6ade4071a9 100644
--- a/drivers/usb/storage/ene_ub6250.c
+++ b/drivers/usb/storage/ene_ub6250.c
@@ -42,7 +42,7 @@ MODULE_LICENSE("GPL");
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
         .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id ene_ub6250_usb_ids[] = {
+static struct usb_device_id ene_ub6250_usb_ids[] = {
 #       include "unusual_ene_ub6250.h"
         { }             /* Terminating entry */
 };
@@ -607,8 +607,8 @@ static int sd_scsi_mode_sense(struct us_data *us, struct scsi_cmnd *srb)
 
 static int sd_scsi_read_capacity(struct us_data *us, struct scsi_cmnd *srb)
 {
-        u32   bl_num;
-        u16    bl_len;
+        u32     bl_num;
+        u32     bl_len;
         unsigned int offset = 0;
         unsigned char    buf[8];
         struct scatterlist *sg = NULL;
@@ -622,7 +622,7 @@ static int sd_scsi_read_capacity(struct us_data *us, struct scsi_cmnd *srb)
                 else
                         bl_num = (info->HC_C_SIZE + 1) * 1024 - 1;
         } else {
-                bl_len = 1<<(info->SD_READ_BL_LEN);
+                bl_len = 1 << (info->SD_READ_BL_LEN);
                 bl_num = info->SD_Block_Mult * (info->SD_C_SIZE + 1)
                                 * (1 << (info->SD_C_SIZE_MULT + 2)) - 1;
         }
@@ -777,7 +777,7 @@ static int ms_lib_free_logicalmap(struct us_data *us)
         return 0;
 }
 
-int ms_lib_alloc_logicalmap(struct us_data *us)
+static int ms_lib_alloc_logicalmap(struct us_data *us)
 {
         u32  i;
         struct ene_ub6250_info *info = (struct ene_ub6250_info *) us->extra;
@@ -2248,7 +2248,7 @@ static int sd_scsi_irp(struct us_data *us, struct scsi_cmnd *srb)
 /*
  * ms_scsi_irp()
  */
-int ms_scsi_irp(struct us_data *us, struct scsi_cmnd *srb)
+static int ms_scsi_irp(struct us_data *us, struct scsi_cmnd *srb)
 {
         int result;
         struct ene_ub6250_info *info = (struct ene_ub6250_info *)us->extra;
diff --git a/drivers/usb/storage/freecom.c b/drivers/usb/storage/freecom.c
index 03d4a873748..fa161574847 100644
--- a/drivers/usb/storage/freecom.c
+++ b/drivers/usb/storage/freecom.c
@@ -119,7 +119,7 @@ static int init_freecom(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id freecom_usb_ids[] = {
+static struct usb_device_id freecom_usb_ids[] = {
 #       include "unusual_freecom.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/isd200.c b/drivers/usb/storage/isd200.c
index 93d359f4d6a..bd550270083 100644
--- a/drivers/usb/storage/isd200.c
+++ b/drivers/usb/storage/isd200.c
@@ -76,7 +76,7 @@ static int isd200_Initialization(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id isd200_usb_ids[] = {
+static struct usb_device_id isd200_usb_ids[] = {
 #       include "unusual_isd200.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c
index 54b71650b69..a19211b5c26 100644
--- a/drivers/usb/storage/jumpshot.c
+++ b/drivers/usb/storage/jumpshot.c
@@ -71,7 +71,7 @@ MODULE_LICENSE("GPL");
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id jumpshot_usb_ids[] = {
+static struct usb_device_id jumpshot_usb_ids[] = {
 #       include "unusual_jumpshot.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/karma.c b/drivers/usb/storage/karma.c
index 35181e29124..e720f8ebdf9 100644
--- a/drivers/usb/storage/karma.c
+++ b/drivers/usb/storage/karma.c
@@ -59,7 +59,7 @@ static int rio_karma_init(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id karma_usb_ids[] = {
+static struct usb_device_id karma_usb_ids[] = {
 #       include "unusual_karma.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c
index 721c8c58730..d75155c3820 100644
--- a/drivers/usb/storage/onetouch.c
+++ b/drivers/usb/storage/onetouch.c
@@ -69,7 +69,7 @@ struct usb_onetouch {
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id onetouch_usb_ids[] = {
+static struct usb_device_id onetouch_usb_ids[] = {
 #       include "unusual_onetouch.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/realtek_cr.c b/drivers/usb/storage/realtek_cr.c
index c41cd30d2c0..1f62723ef1a 100644
--- a/drivers/usb/storage/realtek_cr.c
+++ b/drivers/usb/storage/realtek_cr.c
@@ -398,10 +398,9 @@ static int rts51x_write_mem(struct us_data *us, u16 addr, u8 *data, u16 len)
         u8 cmnd[12] = { 0 };
         u8 *buf;
 
-        buf = kmalloc(len, GFP_NOIO);
+        buf = kmemdup(data, len, GFP_NOIO);
         if (buf == NULL)
                 return USB_STOR_TRANSPORT_ERROR;
-        memcpy(buf, data, len);
 
         US_DEBUGP("%s, addr = 0x%x, len = %d\n", __func__, addr, len);
 
@@ -507,15 +506,14 @@ static int enable_oscillator(struct us_data *us)
 static int __do_config_autodelink(struct us_data *us, u8 *data, u16 len)
 {
         int retval;
-        u16 addr = 0xFE47;
         u8 cmnd[12] = {0};
 
-        US_DEBUGP("%s, addr = 0x%x, len = %d\n", __FUNCTION__, addr, len);
+        US_DEBUGP("%s, addr = 0xfe47, len = %d\n", __FUNCTION__, len);
 
         cmnd[0] = 0xF0;
         cmnd[1] = 0x0E;
-        cmnd[2] = (u8)(addr >> 8);
-        cmnd[3] = (u8)addr;
+        cmnd[2] = 0xfe;
+        cmnd[3] = 0x47;
         cmnd[4] = (u8)(len >> 8);
         cmnd[5] = (u8)len;
 
@@ -818,7 +816,7 @@ static inline int working_scsi(struct scsi_cmnd *srb)
         return 1;
 }
 
-void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
+static void rts51x_invoke_transport(struct scsi_cmnd *srb, struct us_data *us)
 {
         struct rts51x_chip *chip = (struct rts51x_chip *)(us->extra);
         static int card_first_show = 1;
@@ -977,7 +975,7 @@ static void realtek_cr_destructor(void *extra)
 }
 
 #ifdef CONFIG_PM
-int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
+static int realtek_cr_suspend(struct usb_interface *iface, pm_message_t message)
 {
         struct us_data *us = usb_get_intfdata(iface);
 
diff --git a/drivers/usb/storage/sddr09.c b/drivers/usb/storage/sddr09.c
index 83ee49e737b..425df7df2e5 100644
--- a/drivers/usb/storage/sddr09.c
+++ b/drivers/usb/storage/sddr09.c
@@ -71,7 +71,7 @@ static int usb_stor_sddr09_init(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id sddr09_usb_ids[] = {
+static struct usb_device_id sddr09_usb_ids[] = {
 #       include "unusual_sddr09.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
index 8983ec2ffb5..e4ca5fcb7cc 100644
--- a/drivers/usb/storage/sddr55.c
+++ b/drivers/usb/storage/sddr55.c
@@ -48,7 +48,7 @@ MODULE_LICENSE("GPL");
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id sddr55_usb_ids[] = {
+static struct usb_device_id sddr55_usb_ids[] = {
 #       include "unusual_sddr55.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/shuttle_usbat.c b/drivers/usb/storage/shuttle_usbat.c
index a4c02751af4..1369d259061 100644
--- a/drivers/usb/storage/shuttle_usbat.c
+++ b/drivers/usb/storage/shuttle_usbat.c
@@ -170,7 +170,7 @@ static int init_usbat_flash(struct us_data *us);
 { USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
   .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }
 
-struct usb_device_id usbat_usb_ids[] = {
+static struct usb_device_id usbat_usb_ids[] = {
 #       include "unusual_usbat.h"
         { }             /* Terminating entry */
 };
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index aa84b3d7727..3dd7da9fd50 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -1074,6 +1074,7 @@ static struct usb_driver usb_storage_driver = {
         .id_table =     usb_storage_usb_ids,
         .supports_autosuspend = 1,
         .soft_unbind =  1,
+        .no_dynamic_id = 1,
 };
 
 static int __init usb_stor_init(void)
diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 5c6c1bdbd45..8efeae24764 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -27,6 +27,8 @@
 #define USB_SKEL_VENDOR_ID      0xfff0
 #define USB_SKEL_PRODUCT_ID     0xfff0
 
+static DEFINE_MUTEX(skel_mutex);
+
 /* table of devices that work with this driver */
 static const struct usb_device_id skel_table[] = {
         { USB_DEVICE(USB_SKEL_VENDOR_ID, USB_SKEL_PRODUCT_ID) },
@@ -60,7 +62,6 @@ struct usb_skel {
         __u8                    bulk_in_endpointAddr;   /* the address of the bulk in endpoint */
         __u8                    bulk_out_endpointAddr;  /* the address of the bulk out endpoint */
         int                     errors;                 /* the last request tanked */
-        int                     open_count;             /* count the number of openers */
         bool                    ongoing_read;           /* a read is going on */
         bool                    processed_urb;          /* indicates we haven't processed the urb */
         spinlock_t              err_lock;               /* lock for errors */
@@ -100,39 +101,37 @@ static int skel_open(struct inode *inode, struct file *file)
                 goto exit;
         }
 
+        mutex_lock(&skel_mutex);
         dev = usb_get_intfdata(interface);
         if (!dev) {
+                mutex_unlock(&skel_mutex);
                 retval = -ENODEV;
                 goto exit;
         }
 
         /* increment our usage count for the device */
         kref_get(&dev->kref);
+        mutex_unlock(&skel_mutex);
 
         /* lock the device to allow correctly handling errors
          * in resumption */
         mutex_lock(&dev->io_mutex);
+        if (!dev->interface) {
+                retval = -ENODEV;
+                goto out_err;
+        }
 
-        if (!dev->open_count++) {
-                retval = usb_autopm_get_interface(interface);
-                        if (retval) {
-                                dev->open_count--;
-                                mutex_unlock(&dev->io_mutex);
-                                kref_put(&dev->kref, skel_delete);
-                                goto exit;
-                        }
-        } /* else { //uncomment this block if you want exclusive open
-                retval = -EBUSY;
-                dev->open_count--;
-                mutex_unlock(&dev->io_mutex);
-                kref_put(&dev->kref, skel_delete);
-                goto exit;
-        } */
-        /* prevent the device from being autosuspended */
+        retval = usb_autopm_get_interface(interface);
+        if (retval)
+                goto out_err;
 
         /* save our object in the file's private structure */
         file->private_data = dev;
+
+out_err:
         mutex_unlock(&dev->io_mutex);
+        if (retval)
+                kref_put(&dev->kref, skel_delete);
 
 exit:
         return retval;
@@ -148,7 +147,7 @@ static int skel_release(struct inode *inode, struct file *file)
 
         /* allow the device to be autosuspended */
         mutex_lock(&dev->io_mutex);
-        if (!--dev->open_count && dev->interface)
+        if (dev->interface)
                 usb_autopm_put_interface(dev->interface);
         mutex_unlock(&dev->io_mutex);
 
@@ -612,7 +611,6 @@ static void skel_disconnect(struct usb_interface *interface)
         int minor = interface->minor;
 
         dev = usb_get_intfdata(interface);
-        usb_set_intfdata(interface, NULL);
 
         /* give back our minor */
         usb_deregister_dev(interface, &skel_class);
@@ -624,8 +622,12 @@ static void skel_disconnect(struct usb_interface *interface)
 
         usb_kill_anchored_urbs(&dev->submitted);
 
+        mutex_lock(&skel_mutex);
+        usb_set_intfdata(interface, NULL);
+
         /* decrement our usage count */
         kref_put(&dev->kref, skel_delete);
+        mutex_unlock(&skel_mutex);
 
         dev_info(&interface->dev, "USB Skeleton #%d now disconnected", minor);
 }
diff --git a/drivers/usb/wusbcore/Kconfig b/drivers/usb/wusbcore/Kconfig
index eb09a0a14a8..0ead8826ec7 100644
--- a/drivers/usb/wusbcore/Kconfig
+++ b/drivers/usb/wusbcore/Kconfig
@@ -5,6 +5,7 @@ config USB_WUSB
         tristate "Enable Wireless USB extensions (EXPERIMENTAL)"
         depends on EXPERIMENTAL
         depends on USB
+        depends on PCI
         select UWB
         select CRYPTO
         select CRYPTO_BLKCIPHER
diff --git a/drivers/usb/wusbcore/security.c b/drivers/usb/wusbcore/security.c
index 371f61733f0..fa810a83e83 100644
--- a/drivers/usb/wusbcore/security.c
+++ b/drivers/usb/wusbcore/security.c
@@ -354,7 +354,7 @@ int wusb_dev_4way_handshake(struct wusbhc *wusbhc, struct wusb_dev *wusb_dev,
         struct wusb_keydvt_in keydvt_in;
         struct wusb_keydvt_out keydvt_out;
 
-        hs = kzalloc(3*sizeof(hs[0]), GFP_KERNEL);
+        hs = kcalloc(3, sizeof(hs[0]), GFP_KERNEL);
         if (hs == NULL) {
                 dev_err(dev, "can't allocate handshake data\n");
                 goto error_kzalloc;
diff --git a/drivers/uwb/est.c b/drivers/uwb/est.c
index de81ebf5178..86ed7e61e59 100644
--- a/drivers/uwb/est.c
+++ b/drivers/uwb/est.c
@@ -184,7 +184,7 @@ int uwb_est_create(void)
 
         uwb_est_size = 2;
         uwb_est_used = 0;
-        uwb_est = kzalloc(uwb_est_size * sizeof(uwb_est[0]), GFP_KERNEL);
+        uwb_est = kcalloc(uwb_est_size, sizeof(uwb_est[0]), GFP_KERNEL);
         if (uwb_est == NULL)
                 return -ENOMEM;