diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 3f087962f4982..8667ddf3ca74e 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4471,6 +4471,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) unsigned long flags; int ret = 0; u32 hprt0; + u32 pcgctl; spin_lock_irqsave(&hsotg->lock, flags); @@ -4486,7 +4487,7 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) if (hsotg->op_state == OTG_STATE_B_PERIPHERAL) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) goto skip_power_saving; /* @@ -4495,21 +4496,35 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) */ if (!hsotg->bus_suspended) { hprt0 = dwc2_read_hprt0(hsotg); - hprt0 |= HPRT0_SUSP; - hprt0 &= ~HPRT0_PWR; - dwc2_writel(hsotg, hprt0, HPRT0); - spin_unlock_irqrestore(&hsotg->lock, flags); - dwc2_vbus_supply_exit(hsotg); - spin_lock_irqsave(&hsotg->lock, flags); + if (hprt0 & HPRT0_CONNSTS) { + hprt0 |= HPRT0_SUSP; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) + hprt0 &= ~HPRT0_PWR; + dwc2_writel(hsotg, hprt0, HPRT0); + } + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + spin_unlock_irqrestore(&hsotg->lock, flags); + dwc2_vbus_supply_exit(hsotg); + spin_lock_irqsave(&hsotg->lock, flags); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl |= PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } } - /* Enter partial_power_down */ - ret = dwc2_enter_partial_power_down(hsotg); - if (ret) { - if (ret != -ENOTSUPP) - dev_err(hsotg->dev, - "enter partial_power_down failed\n"); - goto skip_power_saving; + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* Enter partial_power_down */ + ret = dwc2_enter_partial_power_down(hsotg); + if (ret) { + if (ret != -ENOTSUPP) + dev_err(hsotg->dev, + "enter partial_power_down failed\n"); + goto skip_power_saving; + } + + /* After entering partial_power_down, hardware is no more accessible */ + clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); } /* Ask phy to be suspended */ @@ -4519,9 +4534,6 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* After entering partial_power_down, hardware is no more accessible */ - clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - skip_power_saving: hsotg->lx_state = DWC2_L2; unlock: @@ -4534,6 +4546,7 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) { struct dwc2_hsotg *hsotg = dwc2_hcd_to_hsotg(hcd); unsigned long flags; + u32 pcgctl; int ret = 0; spin_lock_irqsave(&hsotg->lock, flags); @@ -4544,17 +4557,11 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) if (hsotg->lx_state != DWC2_L2) goto unlock; - if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_PARTIAL) { + if (hsotg->params.power_down > DWC2_POWER_DOWN_PARAM_PARTIAL) { hsotg->lx_state = DWC2_L0; goto unlock; } - /* - * Set HW accessible bit before powering on the controller - * since an interrupt may rise. - */ - set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); - /* * Enable power if not already done. * This must not be spinlocked since duration @@ -4566,10 +4573,23 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_lock_irqsave(&hsotg->lock, flags); } - /* Exit partial_power_down */ - ret = dwc2_exit_partial_power_down(hsotg, true); - if (ret && (ret != -ENOTSUPP)) - dev_err(hsotg->dev, "exit partial_power_down failed\n"); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + /* + * Set HW accessible bit before powering on the controller + * since an interrupt may rise. + */ + set_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags); + + + /* Exit partial_power_down */ + ret = dwc2_exit_partial_power_down(hsotg, true); + if (ret && (ret != -ENOTSUPP)) + dev_err(hsotg->dev, "exit partial_power_down failed\n"); + } else { + pcgctl = readl(hsotg->regs + PCGCTL); + pcgctl &= ~PCGCTL_STOPPCLK; + writel(pcgctl, hsotg->regs + PCGCTL); + } hsotg->lx_state = DWC2_L0; @@ -4581,10 +4601,12 @@ static int _dwc2_hcd_resume(struct usb_hcd *hcd) spin_unlock_irqrestore(&hsotg->lock, flags); dwc2_port_resume(hsotg); } else { - dwc2_vbus_supply_init(hsotg); + if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_PARTIAL) { + dwc2_vbus_supply_init(hsotg); - /* Wait for controller to correctly update D+/D- level */ - usleep_range(3000, 5000); + /* Wait for controller to correctly update D+/D- level */ + usleep_range(3000, 5000); + } /* * Clear Port Enable and Port Status changes.