1 files changed, 79 insertions, 45 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index c5c238ab3083..c0051e250d61 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -408,6 +408,10 @@ static void dwc3_ref_clk_period(struct dwc3 *dwc)
 	reg |= FIELD_PREP(DWC3_GFLADJ_REFCLK_FLADJ_MASK, fladj)
 	    |  FIELD_PREP(DWC3_GFLADJ_240MHZDECR, decr >> 1)
 	    |  FIELD_PREP(DWC3_GFLADJ_240MHZDECR_PLS1, decr & 1);
+
+	if (dwc->gfladj_refclk_lpm_sel)
+		reg |=  DWC3_GFLADJ_REFCLK_LPM_SEL;
+
 	dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
 }
 
@@ -789,7 +793,7 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	else
 		reg |= DWC3_GUSB2PHYCFG_ENBLSLPM;
 
-	if (dwc->dis_u2_freeclk_exists_quirk)
+	if (dwc->dis_u2_freeclk_exists_quirk || dwc->gfladj_refclk_lpm_sel)
 		reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
 
 	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
@@ -833,15 +837,16 @@ static void dwc3_core_exit(struct dwc3 *dwc)
 {
 	dwc3_event_buffers_cleanup(dwc);
 
+	usb_phy_set_suspend(dwc->usb2_phy, 1);
+	usb_phy_set_suspend(dwc->usb3_phy, 1);
+	phy_power_off(dwc->usb2_generic_phy);
+	phy_power_off(dwc->usb3_generic_phy);
+
 	usb_phy_shutdown(dwc->usb2_phy);
 	usb_phy_shutdown(dwc->usb3_phy);
 	phy_exit(dwc->usb2_generic_phy);
 	phy_exit(dwc->usb3_generic_phy);
 
-	usb_phy_set_suspend(dwc->usb2_phy, 1);
-	usb_phy_set_suspend(dwc->usb3_phy, 1);
-	phy_power_off(dwc->usb2_generic_phy);
-	phy_power_off(dwc->usb3_generic_phy);
 	dwc3_clk_disable(dwc);
 	reset_control_assert(dwc->reset);
 }
@@ -1179,6 +1184,21 @@ static int dwc3_core_init(struct dwc3 *dwc)
 		dwc3_writel(dwc->regs, DWC3_GUCTL2, reg);
 	}
 
+	/*
+	 * When configured in HOST mode, after issuing U3/L2 exit controller
+	 * fails to send proper CRC checksum in CRC5 feild. Because of this
+	 * behaviour Transaction Error is generated, resulting in reset and
+	 * re-enumeration of usb device attached. All the termsel, xcvrsel,
+	 * opmode becomes 0 during end of resume. Enabling bit 10 of GUCTL1
+	 * will correct this problem. This option is to support certain
+	 * legacy ULPI PHYs.
+	 */
+	if (dwc->resume_hs_terminations) {
+		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
+		reg |= DWC3_GUCTL1_RESUME_OPMODE_HS_HOST;
+		dwc3_writel(dwc->regs, DWC3_GUCTL1, reg);
+	}
+
 	if (!DWC3_VER_IS_PRIOR(DWC3, 250A)) {
 		reg = dwc3_readl(dwc->regs, DWC3_GUCTL1);
 
@@ -1522,8 +1542,12 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 				"snps,dis-del-phy-power-chg-quirk");
 	dwc->dis_tx_ipgap_linecheck_quirk = device_property_read_bool(dev,
 				"snps,dis-tx-ipgap-linecheck-quirk");
+	dwc->resume_hs_terminations = device_property_read_bool(dev,
+				"snps,resume-hs-terminations");
 	dwc->parkmode_disable_ss_quirk = device_property_read_bool(dev,
 				"snps,parkmode-disable-ss-quirk");
+	dwc->gfladj_refclk_lpm_sel = device_property_read_bool(dev,
+				"snps,gfladj-refclk-lpm-sel-quirk");
 
 	dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
 				"snps,tx_de_emphasis_quirk");
@@ -1751,15 +1775,11 @@ static int dwc3_probe(struct platform_device *pdev)
 
 	dwc3_get_properties(dwc);
 
-	if (!dwc->sysdev_is_parent) {
-		ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64));
-		if (ret)
-			return ret;
-	}
-
 	dwc->reset = devm_reset_control_array_get_optional_shared(dev);
-	if (IS_ERR(dwc->reset))
-		return PTR_ERR(dwc->reset);
+	if (IS_ERR(dwc->reset)) {
+		ret = PTR_ERR(dwc->reset);
+		goto put_usb_psy;
+	}
 
 	if (dev->of_node) {
 		/*
@@ -1769,45 +1789,57 @@ static int dwc3_probe(struct platform_device *pdev)
 		 * check for them to retain backwards compatibility.
 		 */
 		dwc->bus_clk = devm_clk_get_optional(dev, "bus_early");
-		if (IS_ERR(dwc->bus_clk))
-			return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
-					     "could not get bus clock\n");
+		if (IS_ERR(dwc->bus_clk)) {
+			ret = dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
+					    "could not get bus clock\n");
+			goto put_usb_psy;
+		}
 
 		if (dwc->bus_clk == NULL) {
 			dwc->bus_clk = devm_clk_get_optional(dev, "bus_clk");
-			if (IS_ERR(dwc->bus_clk))
-				return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
-						     "could not get bus clock\n");
+			if (IS_ERR(dwc->bus_clk)) {
+				ret = dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
+						    "could not get bus clock\n");
+				goto put_usb_psy;
+			}
 		}
 
 		dwc->ref_clk = devm_clk_get_optional(dev, "ref");
-		if (IS_ERR(dwc->ref_clk))
-			return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
-					     "could not get ref clock\n");
+		if (IS_ERR(dwc->ref_clk)) {
+			ret = dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
+					    "could not get ref clock\n");
+			goto put_usb_psy;
+		}
 
 		if (dwc->ref_clk == NULL) {
 			dwc->ref_clk = devm_clk_get_optional(dev, "ref_clk");
-			if (IS_ERR(dwc->ref_clk))
-				return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
-						     "could not get ref clock\n");
+			if (IS_ERR(dwc->ref_clk)) {
+				ret = dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
+						    "could not get ref clock\n");
+				goto put_usb_psy;
+			}
 		}
 
 		dwc->susp_clk = devm_clk_get_optional(dev, "suspend");
-		if (IS_ERR(dwc->susp_clk))
-			return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
-					     "could not get suspend clock\n");
+		if (IS_ERR(dwc->susp_clk)) {
+			ret = dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
+					    "could not get suspend clock\n");
+			goto put_usb_psy;
+		}
 
 		if (dwc->susp_clk == NULL) {
 			dwc->susp_clk = devm_clk_get_optional(dev, "suspend_clk");
-			if (IS_ERR(dwc->susp_clk))
-				return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
-						     "could not get suspend clock\n");
+			if (IS_ERR(dwc->susp_clk)) {
+				ret = dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
+						    "could not get suspend clock\n");
+				goto put_usb_psy;
+			}
 		}
 	}
 
 	ret = reset_control_deassert(dwc->reset);
 	if (ret)
-		return ret;
+		goto put_usb_psy;
 
 	ret = dwc3_clk_enable(dwc);
 	if (ret)
@@ -1821,7 +1853,13 @@ static int dwc3_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, dwc);
 	dwc3_cache_hwparams(dwc);
-	device_init_wakeup(&pdev->dev, of_property_read_bool(dev->of_node, "wakeup-source"));
+
+	if (!dwc->sysdev_is_parent &&
+	    DWC3_GHWPARAMS0_AWIDTH(dwc->hwparams.hwparams0) == 64) {
+		ret = dma_set_mask_and_coherent(dwc->sysdev, DMA_BIT_MASK(64));
+		if (ret)
+			goto disable_clks;
+	}
 
 	spin_lock_init(&dwc->lock);
 	mutex_init(&dwc->mutex);
@@ -1879,16 +1917,16 @@ err5:
 	dwc3_debugfs_exit(dwc);
 	dwc3_event_buffers_cleanup(dwc);
 
-	usb_phy_shutdown(dwc->usb2_phy);
-	usb_phy_shutdown(dwc->usb3_phy);
-	phy_exit(dwc->usb2_generic_phy);
-	phy_exit(dwc->usb3_generic_phy);
-
 	usb_phy_set_suspend(dwc->usb2_phy, 1);
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
 	phy_power_off(dwc->usb2_generic_phy);
 	phy_power_off(dwc->usb3_generic_phy);
 
+	usb_phy_shutdown(dwc->usb2_phy);
+	usb_phy_shutdown(dwc->usb3_phy);
+	phy_exit(dwc->usb2_generic_phy);
+	phy_exit(dwc->usb3_generic_phy);
+
 	dwc3_ulpi_exit(dwc);
 
 err4:
@@ -1908,7 +1946,7 @@ disable_clks:
 	dwc3_clk_disable(dwc);
 assert_reset:
 	reset_control_assert(dwc->reset);
-
+put_usb_psy:
 	if (dwc->usb_psy)
 		power_supply_put(dwc->usb_psy);
 
@@ -1976,14 +2014,12 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 	case DWC3_GCTL_PRTCAP_DEVICE:
 		if (pm_runtime_suspended(dwc->dev))
 			break;
-		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_gadget_suspend(dwc);
-		spin_unlock_irqrestore(&dwc->lock, flags);
 		synchronize_irq(dwc->irq_gadget);
 		dwc3_core_exit(dwc);
 		break;
 	case DWC3_GCTL_PRTCAP_HOST:
-		if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) {
+		if (!PMSG_IS_AUTO(msg) && !device_may_wakeup(dwc->dev)) {
 			dwc3_core_exit(dwc);
 			break;
 		}
@@ -2039,12 +2075,10 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 			return ret;
 
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
-		spin_lock_irqsave(&dwc->lock, flags);
 		dwc3_gadget_resume(dwc);
-		spin_unlock_irqrestore(&dwc->lock, flags);
 		break;
 	case DWC3_GCTL_PRTCAP_HOST:
-		if (!PMSG_IS_AUTO(msg) && !device_can_wakeup(dwc->dev)) {
+		if (!PMSG_IS_AUTO(msg) && !device_may_wakeup(dwc->dev)) {
 			ret = dwc3_core_init_for_resume(dwc);
 			if (ret)
 				return ret;