The address should be set to zero during reset according to the
documentation. Clearing RunStop ensures that the host disconnects from
the device (it was not cleared by CSFTRST, at least on ls1043).
This allows the dwc3 to properly initialize even if the previous
driver did not shutdown the device (e.g. when using virtualization).
Signed-off-by: Roman Kapl <rka@xxxxxxxxx>
---
drivers/usb/dwc3/core.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c9bb93a2c81e..c633f5e0621d 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -250,6 +250,7 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
reg |= DWC3_DCTL_CSFTRST;
+ reg &= ~DWC3_DCTL_RUN_STOP;
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
do {
@@ -266,6 +267,10 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc)
return -ETIMEDOUT;
done:
+ reg = dwc3_readl(dwc->regs, DWC3_DCFG);
+ reg &= ~(DWC3_DCFG_DEVADDR_MASK);
+ dwc3_writel(dwc->regs, DWC3_DCFG, reg);
+
/*
* For DWC_usb31 controller, once DWC3_DCTL_CSFTRST bit is cleared,
* we must wait at least 50ms before accessing the PHY domain
--
2.22.0
