diff options
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 919a32153060..0a0cf154814b 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -2268,10 +2268,22 @@ static int dwc2_core_init(struct dwc2_hsotg *hsotg, bool initial_setup) */ static void dwc2_core_host_init(struct dwc2_hsotg *hsotg) { - u32 hcfg, hfir, otgctl; + u32 hcfg, hfir, otgctl, usbcfg; dev_dbg(hsotg->dev, "%s(%p)\n", __func__, hsotg); + /* Set HS/FS Timeout Calibration to 7 (max available value). + * The number of PHY clocks that the application programs in + * this field is added to the high/full speed interpacket timeout + * duration in the core to account for any additional delays + * introduced by the PHY. This can be required, because the delay + * introduced by the PHY in generating the linestate condition + * can vary from one PHY to another. + */ + usbcfg = dwc2_readl(hsotg->regs + GUSBCFG); + usbcfg |= GUSBCFG_TOUTCAL(7); + dwc2_writel(usbcfg, hsotg->regs + GUSBCFG); + /* Restart the Phy Clock */ dwc2_writel(0, hsotg->regs + PCGCTL); |