diff options
Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
| -rw-r--r-- | drivers/usb/dwc3/gadget.c | 59 |
1 files changed, 43 insertions, 16 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 7e3db00e9759..520031ba38aa 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -331,9 +331,17 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd, } } - dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0); - dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1); - dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2); + /* + * For some commands such as Update Transfer command, DEPCMDPARn + * registers are reserved. Since the driver often sends Update Transfer + * command, don't write to DEPCMDPARn to avoid register write delays and + * improve performance. + */ + if (DWC3_DEPCMD_CMD(cmd) != DWC3_DEPCMD_UPDATETRANSFER) { + dwc3_writel(dep->regs, DWC3_DEPCMDPAR0, params->param0); + dwc3_writel(dep->regs, DWC3_DEPCMDPAR1, params->param1); + dwc3_writel(dep->regs, DWC3_DEPCMDPAR2, params->param2); + } /* * Synopsys Databook 2.60a states in section 6.3.2.5.6 of that if we're @@ -357,6 +365,12 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd, cmd |= DWC3_DEPCMD_CMDACT; dwc3_writel(dep->regs, DWC3_DEPCMD, cmd); + + if (!(cmd & DWC3_DEPCMD_CMDACT)) { + ret = 0; + goto skip_status; + } + do { reg = dwc3_readl(dep->regs, DWC3_DEPCMD); if (!(reg & DWC3_DEPCMD_CMDACT)) { @@ -398,6 +412,7 @@ int dwc3_send_gadget_ep_cmd(struct dwc3_ep *dep, unsigned int cmd, cmd_status = -ETIMEDOUT; } +skip_status: trace_dwc3_gadget_ep_cmd(dep, cmd, params, cmd_status); if (DWC3_DEPCMD_CMD(cmd) == DWC3_DEPCMD_STARTTRANSFER) { @@ -1260,12 +1275,17 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb, trb->ctrl |= DWC3_TRB_CTRL_ISP_IMI; } + /* All TRBs setup for MST must set CSP=1 when LST=0 */ + if (dep->stream_capable && DWC3_MST_CAPABLE(&dwc->hwparams)) + trb->ctrl |= DWC3_TRB_CTRL_CSP; + if ((!no_interrupt && !chain) || must_interrupt) trb->ctrl |= DWC3_TRB_CTRL_IOC; if (chain) trb->ctrl |= DWC3_TRB_CTRL_CHN; - else if (dep->stream_capable && is_last) + else if (dep->stream_capable && is_last && + !DWC3_MST_CAPABLE(&dwc->hwparams)) trb->ctrl |= DWC3_TRB_CTRL_LST; if (usb_endpoint_xfer_bulk(dep->endpoint.desc) && dep->stream_capable) @@ -1513,7 +1533,8 @@ static int dwc3_prepare_trbs(struct dwc3_ep *dep) * burst capability may try to read and use TRBs beyond the * active transfer instead of stopping. */ - if (dep->stream_capable && req->request.is_last) + if (dep->stream_capable && req->request.is_last && + !DWC3_MST_CAPABLE(&dep->dwc->hwparams)) return ret; } @@ -1546,7 +1567,8 @@ static int dwc3_prepare_trbs(struct dwc3_ep *dep) * burst capability may try to read and use TRBs beyond the * active transfer instead of stopping. */ - if (dep->stream_capable && req->request.is_last) + if (dep->stream_capable && req->request.is_last && + !DWC3_MST_CAPABLE(&dwc->hwparams)) return ret; } @@ -1623,7 +1645,8 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep) return ret; } - if (dep->stream_capable && req->request.is_last) + if (dep->stream_capable && req->request.is_last && + !DWC3_MST_CAPABLE(&dep->dwc->hwparams)) dep->flags |= DWC3_EP_WAIT_TRANSFER_COMPLETE; return 0; @@ -2638,6 +2661,13 @@ static int __dwc3_gadget_start(struct dwc3 *dwc) reg |= DWC3_DCFG_IGNSTRMPP; dwc3_writel(dwc->regs, DWC3_DCFG, reg); + /* Enable MST by default if the device is capable of MST */ + if (DWC3_MST_CAPABLE(&dwc->hwparams)) { + reg = dwc3_readl(dwc->regs, DWC3_DCFG1); + reg &= ~DWC3_DCFG1_DIS_MST_ENH; + dwc3_writel(dwc->regs, DWC3_DCFG1, reg); + } + /* Start with SuperSpeed Default */ dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(512); @@ -3437,7 +3467,8 @@ static void dwc3_gadget_endpoint_stream_event(struct dwc3_ep *dep, case DEPEVT_STREAM_NOSTREAM: if ((dep->flags & DWC3_EP_IGNORE_NEXT_NOSTREAM) || !(dep->flags & DWC3_EP_FORCE_RESTART_STREAM) || - !(dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE)) + (!DWC3_MST_CAPABLE(&dwc->hwparams) && + !(dep->flags & DWC3_EP_WAIT_TRANSFER_COMPLETE))) break; /* @@ -4067,7 +4098,6 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt) struct dwc3 *dwc = evt->dwc; irqreturn_t ret = IRQ_NONE; int left; - u32 reg; left = evt->count; @@ -4099,9 +4129,8 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt) ret = IRQ_HANDLED; /* Unmask interrupt */ - reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0)); - reg &= ~DWC3_GEVNTSIZ_INTMASK; - dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg); + dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), + DWC3_GEVNTSIZ_SIZE(evt->length)); if (dwc->imod_interval) { dwc3_writel(dwc->regs, DWC3_GEVNTCOUNT(0), DWC3_GEVNTCOUNT_EHB); @@ -4130,7 +4159,6 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) struct dwc3 *dwc = evt->dwc; u32 amount; u32 count; - u32 reg; if (pm_runtime_suspended(dwc->dev)) { pm_runtime_get(dwc->dev); @@ -4157,9 +4185,8 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt) evt->flags |= DWC3_EVENT_PENDING; /* Mask interrupt */ - reg = dwc3_readl(dwc->regs, DWC3_GEVNTSIZ(0)); - reg |= DWC3_GEVNTSIZ_INTMASK; - dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), reg); + dwc3_writel(dwc->regs, DWC3_GEVNTSIZ(0), + DWC3_GEVNTSIZ_INTMASK | DWC3_GEVNTSIZ_SIZE(evt->length)); amount = min(count, evt->length - evt->lpos); memcpy(evt->cache + evt->lpos, evt->buf + evt->lpos, amount); |