From 5ca1ccdaa88ac15d1468c5e8bb40885dc6b8a364 Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Thu, 6 Nov 2014 14:27:57 +0800 Subject: [PATCH] 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 Signed-off-by: Felipe Balbi Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi --- 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 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; -- 2.20.1