It is recommended to set USB3 and USB2 SUSPHY bits to '1' after the core initialization is completed above the dwc3 revision 1.94a. Signed-off-by: Huang Rui <ray.huang@xxxxxxx> --- drivers/usb/dwc3/core.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index e36fcd0..7b5cd76 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -374,6 +374,15 @@ static void dwc3_phy_setup(struct dwc3 *dwc) reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0)); + /* + * Above 1.94a, it is recommended to set DWC3_GUSB3PIPECTL_SUSPHY + * to '0' during coreConsultant configuration. So default value + * will be '0' when the core is reset. Application needs to set it + * to '1' after the core initialization is completed. + */ + if (dwc->revision > DWC3_REVISION_194A) + reg |= DWC3_GUSB3PIPECTL_SUSPHY; + if (dwc->u2ss_inp3_quirk) reg |= DWC3_GUSB3PIPECTL_U2SSINP3OK; @@ -398,6 +407,21 @@ static void dwc3_phy_setup(struct dwc3 *dwc) dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg); mdelay(100); + + reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0)); + + /* + * Above 1.94a, it is recommended to set DWC3_GUSB2PHYCFG_SUSPHY to + * '0' during coreConsultant configuration. So default value will + * be '0' when the core is reset. Application needs to set it to + * '1' after the core initialization is completed. + */ + if (dwc->revision > DWC3_REVISION_194A) + reg |= DWC3_GUSB2PHYCFG_SUSPHY; + + dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg); + + mdelay(100); } /** -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
