diff options
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index 2b910e09a80a..9cd87513619c 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -236,6 +236,8 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, unsigned long flags; int ret; + enum dwc3_link_state link_state; + u32 reg; spin_lock_irqsave(&dwc->lock, flags); if (!dep->endpoint.desc) { @@ -252,6 +254,18 @@ int dwc3_gadget_ep0_queue(struct usb_ep *ep, struct usb_request *request, goto out; } + /* if link stats is in L1 initiate remote wakeup before queuing req */ + if (dwc->speed != DWC3_DSTS_SUPERSPEED) { + link_state = dwc3_get_link_state(dwc); + /* in HS this link state is same as L1 */ + if (link_state == DWC3_LINK_STATE_U2) { + dwc->l1_remote_wakeup_cnt++; + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + reg |= DWC3_DCTL_ULSTCHNG_RECOVERY; + dwc3_writel(dwc->regs, DWC3_DCTL, reg); + } + } + dwc3_trace(trace_dwc3_ep0, "queueing request %pK to %s length %d state '%s'", request, dep->name, request->length, |