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usb: dwc2: gadget: Add dwc2_gadget_start_next_request function

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Replaced repeating code with function call.

Starts next request from ep queue.
If queue is empty and ep is isoc
-In case of OUT-EP unmasks OUTTKNEPDIS.

OUTTKNEPDIS is masked in it's handler, so we need to unmask it here
to be able to do resynchronization.

Tested-by: John Keeping <john@metanate.com>
Signed-off-by: Vardan Mikayelyan <mvardan@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Vardan Mikayelyan 2016-05-25 18:07:12 -07:00 committed by Felipe Balbi
parent 326015887b
commit 41cc4cd271
1 changed files with 38 additions and 13 deletions
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51
drivers/usb/dwc2/gadget.c
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@ -1044,6 +1044,42 @@ static struct dwc2_hsotg_req *get_ep_head(struct dwc2_hsotg_ep *hs_ep)
return list_first_entry(&hs_ep->queue, struct dwc2_hsotg_req, queue);
}
/**
* dwc2_gadget_start_next_request - Starts next request from ep queue
* @hs_ep: Endpoint structure
*
* If queue is empty and EP is ISOC-OUT - unmasks OUTTKNEPDIS which is masked
* in its handler. Hence we need to unmask it here to be able to do
* resynchronization.
*/
static void dwc2_gadget_start_next_request(struct dwc2_hsotg_ep *hs_ep)
{
u32 mask;
struct dwc2_hsotg *hsotg = hs_ep->parent;
int dir_in = hs_ep->dir_in;
struct dwc2_hsotg_req *hs_req;
u32 epmsk_reg = dir_in ? DIEPMSK : DOEPMSK;
if (!list_empty(&hs_ep->queue)) {
hs_req = get_ep_head(hs_ep);
dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, false);
return;
}
if (!hs_ep->isochronous)
return;
if (dir_in) {
dev_dbg(hsotg->dev, "%s: No more ISOC-IN requests\n",
__func__);
} else {
dev_dbg(hsotg->dev, "%s: No more ISOC-OUT requests\n",
__func__);
mask = dwc2_readl(hsotg->regs + epmsk_reg);
mask |= DOEPMSK_OUTTKNEPDISMSK;
dwc2_writel(mask, hsotg->regs + epmsk_reg);
}
}
/**
* dwc2_hsotg_process_req_feature - process request {SET,CLEAR}_FEATURE
* @hsotg: The device state
@ -1054,7 +1090,6 @@ static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
{
struct dwc2_hsotg_ep *ep0 = hsotg->eps_out[0];
struct dwc2_hsotg_req *hs_req;
bool restart;
bool set = (ctrl->bRequest == USB_REQ_SET_FEATURE);
struct dwc2_hsotg_ep *ep;
int ret;
@ -1137,12 +1172,7 @@ static int dwc2_hsotg_process_req_feature(struct dwc2_hsotg *hsotg,
/* If we have pending request, then start it */
if (!ep->req) {
restart = !list_empty(&ep->queue);
if (restart) {
hs_req = get_ep_head(ep);
dwc2_hsotg_start_req(hsotg, ep,
hs_req, false);
}
dwc2_gadget_start_next_request(ep);
}
}
@ -1383,7 +1413,6 @@ static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg,
struct dwc2_hsotg_req *hs_req,
int result)
{
bool restart;
if (!hs_req) {
dev_dbg(hsotg->dev, "%s: nothing to complete?\n", __func__);
@ -1427,11 +1456,7 @@ static void dwc2_hsotg_complete_request(struct dwc2_hsotg *hsotg,
*/
if (!hs_ep->req && result >= 0) {
restart = !list_empty(&hs_ep->queue);
if (restart) {
hs_req = get_ep_head(hs_ep);
dwc2_hsotg_start_req(hsotg, hs_ep, hs_req, false);
}
dwc2_gadget_start_next_request(hs_ep);
}
}