usb: gadget: net2272: use udc-core's reset notifier

This patch adds support for the new udc-core reset notifier to the
net2272 driver.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 35 insertions, 10 deletions

diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index ab3a73950d8f..3a90856625f2 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -1982,17 +1982,42 @@ net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat)
         mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED);
 
         if (stat & tmp) {
+                bool    reset = false;
+                bool    disconnect = false;
+
+                /*
+                 * Ignore disconnects and resets if the speed hasn't been set.
+                 * VBUS can bounce and there's always an initial reset.
+                 */
                 net2272_write(dev, IRQSTAT1, tmp);
-                if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
-                                ((net2272_read(dev, USBCTL1) & mask) == 0))
-                        || ((net2272_read(dev, USBCTL1) & (1 << VBUS_PIN))
-                                == 0))
-                                && (dev->gadget.speed != USB_SPEED_UNKNOWN)) {
-                        dev_dbg(dev->dev, "disconnect %s\n",
-                                dev->driver->driver.name);
-                        stop_activity(dev, dev->driver);
-                        net2272_ep0_start(dev);
-                        return;
+                if (dev->gadget.speed != USB_SPEED_UNKNOWN) {
+                        if ((stat & (1 << VBUS_INTERRUPT)) &&
+                                        (net2272_read(dev, USBCTL1) &
+                                                (1 << VBUS_PIN)) == 0) {
+                                disconnect = true;
+                                dev_dbg(dev->dev, "disconnect %s\n",
+                                        dev->driver->driver.name);
+                        } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) &&
+                                        (net2272_read(dev, USBCTL1) & mask)
+                                                == 0) {
+                                reset = true;
+                                dev_dbg(dev->dev, "reset %s\n",
+                                        dev->driver->driver.name);
+                        }
+
+                        if (disconnect || reset) {
+                                stop_activity(dev, dev->driver);
+                                net2272_ep0_start(dev);
+                                spin_unlock(&dev->lock);
+                                if (reset)
+                                        usb_gadget_udc_reset
+                                                (&dev->gadget, dev->driver);
+                                else
+                                        (dev->driver->disconnect)
+                                                (&dev->gadget);
+                                spin_lock(&dev->lock);
+                                return;
+                        }
                 }
                 stat &= ~tmp;