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path: root/drivers/usb/dwc3/gadget.c
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Diffstat (limited to 'drivers/usb/dwc3/gadget.c')
-rw-r--r--drivers/usb/dwc3/gadget.c59
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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 05:51:42 +0100