diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 58 |
1 files changed, 51 insertions, 7 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2da0a5a2803a..e99a6986cab6 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -532,12 +532,11 @@ static int __dwc3_gadget_ep_enable(struct dwc3_ep *dep, if (!usb_endpoint_xfer_isoc(desc)) return 0; - memset(&trb_link, 0, sizeof(trb_link)); - /* Link TRB for ISOC. The HWO bit is never reset */ trb_st_hw = &dep->trb_pool[0]; trb_link = &dep->trb_pool[DWC3_TRB_NUM - 1]; + memset(trb_link, 0, sizeof(*trb_link)); trb_link->bpl = lower_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); trb_link->bph = upper_32_bits(dwc3_trb_dma_offset(dep, trb_st_hw)); @@ -586,6 +585,10 @@ static int __dwc3_gadget_ep_disable(struct dwc3_ep *dep) dwc3_remove_requests(dwc, dep); + /* make sure HW endpoint isn't stalled */ + if (dep->flags & DWC3_EP_STALL) + __dwc3_gadget_ep_set_halt(dep, 0, false); + reg = dwc3_readl(dwc->regs, DWC3_DALEPENA); reg &= ~DWC3_DALEPENA_EP(dep->number); dwc3_writel(dwc->regs, DWC3_DALEPENA, reg); @@ -884,8 +887,7 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) if (i == (request->num_mapped_sgs - 1) || sg_is_last(s)) { - if (list_is_last(&req->list, - &dep->request_list)) + if (list_empty(&dep->request_list)) last_one = true; chain = false; } @@ -903,6 +905,9 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep, bool starting) if (last_one) break; } + + if (last_one) + break; } else { dma = req->request.dma; length = req->request.length; @@ -1182,7 +1187,7 @@ out0: return ret; } -int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) +int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol) { struct dwc3_gadget_ep_cmd_params params; struct dwc3 *dwc = dep->dwc; @@ -1191,6 +1196,14 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value) memset(¶ms, 0x00, sizeof(params)); if (value) { + if (!protocol && ((dep->direction && dep->flags & DWC3_EP_BUSY) || + (!list_empty(&dep->req_queued) || + !list_empty(&dep->request_list)))) { + dev_dbg(dwc->dev, "%s: pending request, cannot halt\n", + dep->name); + return -EAGAIN; + } + ret = dwc3_send_gadget_ep_cmd(dwc, dep->number, DWC3_DEPCMD_SETSTALL, ¶ms); if (ret) @@ -1230,7 +1243,7 @@ static int dwc3_gadget_ep_set_halt(struct usb_ep *ep, int value) goto out; } - ret = __dwc3_gadget_ep_set_halt(dep, value); + ret = __dwc3_gadget_ep_set_halt(dep, value, false); out: spin_unlock_irqrestore(&dwc->lock, flags); @@ -1250,7 +1263,7 @@ static int dwc3_gadget_ep_set_wedge(struct usb_ep *ep) if (dep->number == 0 || dep->number == 1) return dwc3_gadget_ep0_set_halt(ep, 1); else - return dwc3_gadget_ep_set_halt(ep, 1); + return __dwc3_gadget_ep_set_halt(dep, 1, false); } /* -------------------------------------------------------------------------- */ @@ -2381,6 +2394,30 @@ static void dwc3_gadget_linksts_change_interrupt(struct dwc3 *dwc, dev_vdbg(dwc->dev, "%s link %d\n", __func__, dwc->link_state); } +static void dwc3_gadget_hibernation_interrupt(struct dwc3 *dwc, + unsigned int evtinfo) +{ + unsigned int is_ss = evtinfo & BIT(4); + + /** + * WORKAROUND: DWC3 revison 2.20a with hibernation support + * have a known issue which can cause USB CV TD.9.23 to fail + * randomly. + * + * Because of this issue, core could generate bogus hibernation + * events which SW needs to ignore. + * + * Refers to: + * + * STAR#9000546576: Device Mode Hibernation: Issue in USB 2.0 + * Device Fallback from SuperSpeed + */ + if (is_ss ^ (dwc->speed == USB_SPEED_SUPER)) + return; + + /* enter hibernation here */ +} + static void dwc3_gadget_interrupt(struct dwc3 *dwc, const struct dwc3_event_devt *event) { @@ -2397,6 +2434,13 @@ static void dwc3_gadget_interrupt(struct dwc3 *dwc, case DWC3_DEVICE_EVENT_WAKEUP: dwc3_gadget_wakeup_interrupt(dwc); break; + case DWC3_DEVICE_EVENT_HIBER_REQ: + if (dev_WARN_ONCE(dwc->dev, !dwc->has_hibernation, + "unexpected hibernation event\n")) + break; + + dwc3_gadget_hibernation_interrupt(dwc, event->event_info); + break; case DWC3_DEVICE_EVENT_LINK_STATUS_CHANGE: dwc3_gadget_linksts_change_interrupt(dwc, event->event_info); break; |