diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/gadget/atmel_usba_udc.c | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c index e756023362c2..07e5a0b5dcda 100644 --- a/drivers/usb/gadget/atmel_usba_udc.c +++ b/drivers/usb/gadget/atmel_usba_udc.c @@ -649,7 +649,13 @@ static int usba_ep_disable(struct usb_ep *_ep) if (!ep->desc) { spin_unlock_irqrestore(&udc->lock, flags); - DBG(DBG_ERR, "ep_disable: %s not enabled\n", ep->ep.name); + /* REVISIT because this driver disables endpoints in + * reset_all_endpoints() before calling disconnect(), + * most gadget drivers would trigger this non-error ... + */ + if (udc->gadget.speed != USB_SPEED_UNKNOWN) + DBG(DBG_ERR, "ep_disable: %s not enabled\n", + ep->ep.name); return -EINVAL; } ep->desc = NULL; @@ -1032,8 +1038,6 @@ static struct usba_udc the_udc = { .release = nop_release, }, }, - - .lock = SPIN_LOCK_UNLOCKED, }; /* @@ -1052,6 +1056,12 @@ static void reset_all_endpoints(struct usba_udc *udc) request_complete(ep, req, -ECONNRESET); } + /* NOTE: normally, the next call to the gadget driver is in + * charge of disabling endpoints... usually disconnect(). + * The exception would be entering a high speed test mode. + * + * FIXME remove this code ... and retest thoroughly. + */ list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) { if (ep->desc) { spin_unlock(&udc->lock); @@ -1219,7 +1229,7 @@ static inline bool feature_is_ep_halt(struct usb_ctrlrequest *crq) static int handle_ep0_setup(struct usba_udc *udc, struct usba_ep *ep, struct usb_ctrlrequest *crq) { - int retval = 0;; + int retval = 0; switch (crq->bRequest) { case USB_REQ_GET_STATUS: { @@ -1693,6 +1703,14 @@ static irqreturn_t usba_udc_irq(int irq, void *devid) usba_writel(udc, INT_CLR, USBA_END_OF_RESET); reset_all_endpoints(udc); + if (udc->gadget.speed != USB_SPEED_UNKNOWN + && udc->driver->disconnect) { + udc->gadget.speed = USB_SPEED_UNKNOWN; + spin_unlock(&udc->lock); + udc->driver->disconnect(&udc->gadget); + spin_lock(&udc->lock); + } + if (status & USBA_HIGH_SPEED) { DBG(DBG_BUS, "High-speed bus reset detected\n"); udc->gadget.speed = USB_SPEED_HIGH; @@ -1716,9 +1734,13 @@ static irqreturn_t usba_udc_irq(int irq, void *devid) | USBA_DET_SUSPEND | USBA_END_OF_RESUME)); + /* + * Unclear why we hit this irregularly, e.g. in usbtest, + * but it's clearly harmless... + */ if (!(usba_ep_readl(ep0, CFG) & USBA_EPT_MAPPED)) - dev_warn(&udc->pdev->dev, - "WARNING: EP0 configuration is invalid!\n"); + dev_dbg(&udc->pdev->dev, + "ODD: EP0 configuration is invalid!\n"); } spin_unlock(&udc->lock); @@ -1751,9 +1773,11 @@ static irqreturn_t usba_vbus_irq(int irq, void *devid) reset_all_endpoints(udc); toggle_bias(0); usba_writel(udc, CTRL, USBA_DISABLE_MASK); - spin_unlock(&udc->lock); - udc->driver->disconnect(&udc->gadget); - spin_lock(&udc->lock); + if (udc->driver->disconnect) { + spin_unlock(&udc->lock); + udc->driver->disconnect(&udc->gadget); + spin_lock(&udc->lock); + } } udc->vbus_prev = vbus; } @@ -1825,7 +1849,7 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) if (!udc->pdev) return -ENODEV; - if (driver != udc->driver) + if (driver != udc->driver || !driver->unbind) return -EINVAL; if (udc->vbus_pin != -1) @@ -1840,6 +1864,9 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver) toggle_bias(0); usba_writel(udc, CTRL, USBA_DISABLE_MASK); + if (udc->driver->disconnect) + udc->driver->disconnect(&udc->gadget); + driver->unbind(&udc->gadget); udc->gadget.dev.driver = NULL; udc->driver = NULL; @@ -1879,6 +1906,7 @@ static int __init usba_udc_probe(struct platform_device *pdev) goto err_get_hclk; } + spin_lock_init(&udc->lock); udc->pdev = pdev; udc->pclk = pclk; udc->hclk = hclk; |