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usb: dwc3: use ep0_next_event field

Browse source 
Start tracking the next expected event and act
on the error conditions as suggested by databook.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2011-08-30 15:52:17 +03:00
parent b53c772d16
commit 1ddcb218b5
1 changed files with 36 additions and 4 deletions
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40
drivers/usb/dwc3/ep0.c
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@ -120,6 +120,8 @@ static int dwc3_ep0_start_trans(struct dwc3 *dwc, u8 epnum, dma_addr_t buf_dma,
dep->res_trans_idx = dwc3_gadget_ep_get_transfer_index(dwc,
dep->number);
dwc->ep0_next_event = DWC3_EP0_COMPLETE;
return 0;
}
@ -250,7 +252,6 @@ static void dwc3_ep0_send_status_response(struct dwc3 *dwc)
dwc3_ep0_start_trans(dwc, 1, dwc->setup_buf_addr,
dwc->ep0_usb_req.length,
DWC3_TRBCTL_CONTROL_DATA);
dwc->ep0_status_pending = 1;
}
/*
@ -295,7 +296,7 @@ static int dwc3_ep0_handle_status(struct dwc3 *dwc, struct usb_ctrlrequest *ctrl
response_pkt = (__le16 *) dwc->setup_buf;
*response_pkt = cpu_to_le16(usb_status);
dwc->ep0_usb_req.length = sizeof(*response_pkt);
dwc3_ep0_send_status_response(dwc);
dwc->ep0_status_pending = 1;
return 0;
}
@ -526,10 +527,13 @@ static void dwc3_ep0_inspect_setup(struct dwc3 *dwc,
goto err;
len = le16_to_cpu(ctrl->wLength);
if (!len)
if (!len) {
dwc->three_stage_setup = 0;
else
dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS;
} else {
dwc->three_stage_setup = 1;
dwc->ep0_next_event = DWC3_EP0_NRDY_DATA;
}
if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD)
ret = dwc3_ep0_std_request(dwc, ctrl);
@ -556,6 +560,8 @@ static void dwc3_ep0_complete_data(struct dwc3 *dwc,
epnum = event->endpoint_number;
dep = dwc->eps[epnum];
dwc->ep0_next_event = DWC3_EP0_NRDY_STATUS;
if (!dwc->ep0_status_pending) {
r = next_request(&dwc->eps[0]->request_list);
ur = &r->request;
@ -655,6 +661,11 @@ static void dwc3_ep0_do_control_data(struct dwc3 *dwc,
dep = dwc->eps[0];
dwc->ep0state = EP0_DATA_PHASE;
if (dwc->ep0_status_pending) {
dwc3_ep0_send_status_response(dwc);
return;
}
if (list_empty(&dep->request_list)) {
dev_vdbg(dwc->dev, "pending request for EP0 Data phase\n");
dep->flags |= DWC3_EP_PENDING_REQUEST;
@ -724,12 +735,33 @@ static void dwc3_ep0_xfernotready(struct dwc3 *dwc,
dev_vdbg(dwc->dev, "Control Setup\n");
dwc3_ep0_do_control_setup(dwc, event);
break;
case DEPEVT_STATUS_CONTROL_DATA:
dev_vdbg(dwc->dev, "Control Data\n");
if (dwc->ep0_next_event != DWC3_EP0_NRDY_DATA) {
dev_vdbg(dwc->dev, "Expected %d got %d\n",
DEPEVT_STATUS_CONTROL_DATA,
event->status);
dwc3_ep0_stall_and_restart(dwc);
return;
}
dwc3_ep0_do_control_data(dwc, event);
break;
case DEPEVT_STATUS_CONTROL_STATUS:
dev_vdbg(dwc->dev, "Control Status\n");
if (dwc->ep0_next_event != DWC3_EP0_NRDY_STATUS) {
dev_vdbg(dwc->dev, "Expected %d got %d\n",
DEPEVT_STATUS_CONTROL_STATUS,
event->status);
dwc3_ep0_stall_and_restart(dwc);
return;
}
dwc3_ep0_do_control_status(dwc, event);
}
}