From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
This patch adds support for the new udc-core reset notifier to the
net2272 driver.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Peter Chen <peter.chen@xxxxxxxxxxxxx>
---
drivers/usb/gadget/udc/net2272.c | 45 +++++++++++++++++++++++++++++---------
1 file changed, 35 insertions(+), 10 deletions(-)
diff --git a/drivers/usb/gadget/udc/net2272.c b/drivers/usb/gadget/udc/net2272.c
index 059cfe5..d828680 100644
--- a/drivers/usb/gadget/udc/net2272.c
+++ b/drivers/usb/gadget/udc/net2272.c
@@ -1987,17 +1987,42 @@ 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;
--
1.7.9.5
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