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usb: dwc3: st: Fix USB_DR_MODE_PERIPHERAL configuration.

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Set USB3_FORCE_VBUSVALID when configured for USB_DR_MODE_PERIPHERAL
mode, as it is required to have a working setup.

This worked on the internal driver by relying on the reset
value of the syscfg register as the bits aren't explicity cleared
and set like the upstream driver.

Also add a comment about what setting this bit means.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Peter Griffin 2016-05-11 17:33:11 +01:00 committed by Felipe Balbi
parent 7e14f47a55
commit 27a0faafdc
1 changed files with 8 additions and 2 deletions
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10
drivers/usb/dwc3/dwc3-st.c
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@ -129,12 +129,18 @@ static int st_dwc3_drd_init(struct st_dwc3 *dwc3_data)
switch (dwc3_data->dr_mode) {
case USB_DR_MODE_PERIPHERAL:
val &= ~(USB3_FORCE_VBUSVALID | USB3_DELAY_VBUSVALID
val &= ~(USB3_DELAY_VBUSVALID
| USB3_SEL_FORCE_OPMODE | USB3_FORCE_OPMODE(0x3)
| USB3_SEL_FORCE_DPPULLDOWN2 | USB3_FORCE_DPPULLDOWN2
| USB3_SEL_FORCE_DMPULLDOWN2 | USB3_FORCE_DMPULLDOWN2);
val |= USB3_DEVICE_NOT_HOST;
/*
* USB3_PORT2_FORCE_VBUSVALID When '1' and when
* USB3_PORT2_DEVICE_NOT_HOST = 1, forces VBUSVLDEXT2 input
* of the pico PHY to 1.
*/
val |= USB3_DEVICE_NOT_HOST | USB3_FORCE_VBUSVALID;
break;
case USB_DR_MODE_HOST: