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usb: dwc3: ep0: fix SetFeature(TEST)

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When host requests us to enter a test mode,
we cannot directly enter the test mode before
Status Phase is completed, otherwise the core
will never be able to deliver the Status ZLP
to host, because it has already entered the
requested Test Mode.

In order to fix the error, we move the actual
start of Test Mode right after we receive
Transfer Complete event of the status phase.

Signed-off-by: Gerard Cauvy <g-cauvy1@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Gerard Cauvy 2012-02-10 12:21:18 +02:00 committed by Felipe Balbi
parent 090725431b
commit 3b637367ae
3 changed files with 17 additions and 8 deletions
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3
drivers/usb/dwc3/core.h
View File

@ -684,6 +684,9 @@ struct dwc3 {
struct dwc3_hwparams hwparams;
struct dentry *root;
u8 test_mode;
u8 test_mode_nr;
};
/* -------------------------------------------------------------------------- */

21
drivers/usb/dwc3/ep0.c
View File

@ -316,7 +316,6 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
u32 wValue;
u32 wIndex;
int ret;
u32 mode;
wValue = le16_to_cpu(ctrl->wValue);
wIndex = le16_to_cpu(ctrl->wIndex);
@ -355,13 +354,8 @@ static int dwc3_ep0_handle_feature(struct dwc3 *dwc,
if (!set)
return -EINVAL;
mode = wIndex >> 8;
ret = dwc3_gadget_set_test_mode(dwc, mode);
if (ret < 0) {
dev_dbg(dwc->dev, "Invalid Test #%d\n",
mode);
return ret;
}
dwc->test_mode_nr = wIndex >> 8;
dwc->test_mode = true;
}
break;
@ -604,6 +598,17 @@ static void dwc3_ep0_complete_req(struct dwc3 *dwc,
dwc3_gadget_giveback(dep, r, 0);
}
if (dwc->test_mode) {
int ret;
ret = dwc3_gadget_set_test_mode(dwc, dwc->test_mode_nr);
if (ret < 0) {
dev_dbg(dwc->dev, "Invalid Test #%d\n",
dwc->test_mode_nr);
dwc3_ep0_stall_and_restart(dwc);
}
}
dwc->ep0state = EP0_SETUP_PHASE;
dwc3_ep0_out_start(dwc);
}

1
drivers/usb/dwc3/gadget.c
View File

@ -1962,6 +1962,7 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg &= ~DWC3_DCTL_TSTCTRL_MASK;
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
dwc->test_mode = false;
dwc3_stop_active_transfers(dwc);
dwc3_clear_stall_all_ep(dwc);