diff options
Diffstat (limited to 'drivers/usb/gadget/fsl_udc_core.c')
| -rw-r--r-- | drivers/usb/gadget/fsl_udc_core.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c index 5f94e79cd6b9..55abfb6bd612 100644 --- a/drivers/usb/gadget/fsl_udc_core.c +++ b/drivers/usb/gadget/fsl_udc_core.c @@ -730,7 +730,7 @@ static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req) : (1 << (ep_index(ep))); /* check if the pipe is empty */ - if (!(list_empty(&ep->queue))) { + if (!(list_empty(&ep->queue)) && !(ep_index(ep) == 0)) { /* Add td to the end */ struct fsl_req *lastreq; lastreq = list_entry(ep->queue.prev, struct fsl_req, queue); @@ -918,10 +918,6 @@ fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) return -ENOMEM; } - /* Update ep0 state */ - if ((ep_index(ep) == 0)) - udc->ep0_state = DATA_STATE_XMIT; - /* irq handler advances the queue */ if (req != NULL) list_add_tail(&req->queue, &ep->queue); @@ -1279,7 +1275,8 @@ static int ep0_prime_status(struct fsl_udc *udc, int direction) udc->ep0_dir = USB_DIR_OUT; ep = &udc->eps[0]; - udc->ep0_state = WAIT_FOR_OUT_STATUS; + if (udc->ep0_state != DATA_STATE_XMIT) + udc->ep0_state = WAIT_FOR_OUT_STATUS; req->ep = ep; req->req.length = 0; @@ -1384,6 +1381,9 @@ static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value, list_add_tail(&req->queue, &ep->queue); udc->ep0_state = DATA_STATE_XMIT; + if (ep0_prime_status(udc, EP_DIR_OUT)) + ep0stall(udc); + return; stall: ep0stall(udc); @@ -1492,6 +1492,14 @@ static void setup_received_irq(struct fsl_udc *udc, spin_lock(&udc->lock); udc->ep0_state = (setup->bRequestType & USB_DIR_IN) ? DATA_STATE_XMIT : DATA_STATE_RECV; + /* + * If the data stage is IN, send status prime immediately. + * See 2.0 Spec chapter 8.5.3.3 for detail. + */ + if (udc->ep0_state == DATA_STATE_XMIT) + if (ep0_prime_status(udc, EP_DIR_OUT)) + ep0stall(udc); + } else { /* No data phase, IN status from gadget */ udc->ep0_dir = USB_DIR_IN; @@ -1520,9 +1528,8 @@ static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0, switch (udc->ep0_state) { case DATA_STATE_XMIT: - /* receive status phase */ - if (ep0_prime_status(udc, EP_DIR_OUT)) - ep0stall(udc); + /* already primed at setup_received_irq */ + udc->ep0_state = WAIT_FOR_OUT_STATUS; break; case DATA_STATE_RECV: /* send status phase */ |