diff options
Diffstat (limited to 'drivers/usb/dwc3/core.c')
-rw-r--r-- | drivers/usb/dwc3/core.c | 46 |
1 files changed, 30 insertions, 16 deletions
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 104b236..921f181 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -117,6 +117,33 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc) } /** + * dwc3_soft_reset - Issue soft reset + * @dwc: Pointer to our controller context structure + */ +static int dwc3_soft_reset(struct dwc3 *dwc) +{ + unsigned long timeout; + u32 reg; + + timeout = jiffies + msecs_to_jiffies(500); + dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); + do { + reg = dwc3_readl(dwc->regs, DWC3_DCTL); + if (!(reg & DWC3_DCTL_CSFTRST)) + break; + + if (time_after(jiffies, timeout)) { + dev_err(dwc->dev, "Reset Timed Out\n"); + return -ETIMEDOUT; + } + + cpu_relax(); + } while (true); + + return 0; +} + +/** * dwc3_free_one_event_buffer - Frees one event buffer * @dwc: Pointer to our controller context structure * @evt: Pointer to event buffer to be freed @@ -438,7 +465,6 @@ static void dwc3_phy_setup(struct dwc3 *dwc) */ static int dwc3_core_init(struct dwc3 *dwc) { - unsigned long timeout; u32 hwparams4 = dwc->hwparams.hwparams4; u32 reg; int ret; @@ -466,21 +492,9 @@ static int dwc3_core_init(struct dwc3 *dwc) } /* issue device SoftReset too */ - timeout = jiffies + msecs_to_jiffies(500); - dwc3_writel(dwc->regs, DWC3_DCTL, DWC3_DCTL_CSFTRST); - do { - reg = dwc3_readl(dwc->regs, DWC3_DCTL); - if (!(reg & DWC3_DCTL_CSFTRST)) - break; - - if (time_after(jiffies, timeout)) { - dev_err(dwc->dev, "Reset Timed Out\n"); - ret = -ETIMEDOUT; - goto err0; - } - - cpu_relax(); - } while (true); + ret = dwc3_soft_reset(dwc); + if (ret) + goto err0; ret = dwc3_core_soft_reset(dwc); if (ret) |