21 files changed, 286 insertions, 100 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 4a08b70c81aa..d025cc06dda7 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -642,7 +642,7 @@ static int ehci_start_port_reset(struct usb_hcd *hcd, unsigned port)
 #define ehci_start_port_reset	NULL
 #endif /* CONFIG_USB_OTG */
 
-static struct ehci_driver_overrides ehci_fsl_overrides __initdata = {
+static const struct ehci_driver_overrides ehci_fsl_overrides __initconst = {
 	.extra_priv_size = sizeof(struct ehci_fsl),
 	.reset = ehci_fsl_setup,
 };
diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 94ea9fff13e6..4d308533bc83 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -130,8 +130,8 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
-		dev_err(dev, "EHCI irq failed\n");
-		return -ENODEV;
+		dev_err(dev, "EHCI irq failed: %d\n", irq);
+		return irq;
 	}
 
 	res =  platform_get_resource(pdev, IORESOURCE_MEM, 0);
diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-of.c
index e90ddb530765..ba557cdba8ef 100644
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -55,8 +55,8 @@ static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np)
 				return &dr_mode_data[i];
 		}
 	}
-	pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n",
-		np->full_name);
+	pr_warn("%pOF: Invalid 'dr_mode' property, fallback to host mode\n",
+		np);
 	return &dr_mode_data[0]; /* mode not specified, use host */
 }
 
diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c
index 1db0626c8bf4..da3b18038d23 100644
--- a/drivers/usb/host/hwa-hc.c
+++ b/drivers/usb/host/hwa-hc.c
@@ -614,7 +614,7 @@ error:
 	return result;
 }
 
-static struct hc_driver hwahc_hc_driver = {
+static const struct hc_driver hwahc_hc_driver = {
 	.description = "hwa-hcd",
 	.product_desc = "Wireless USB HWA host controller",
 	.hcd_priv_size = sizeof(struct hwahc) - sizeof(struct usb_hcd),
@@ -860,7 +860,7 @@ static void hwahc_disconnect(struct usb_interface *usb_iface)
 	usb_put_hcd(usb_hcd);
 }
 
-static struct usb_device_id hwahc_id_table[] = {
+static const struct usb_device_id hwahc_id_table[] = {
 	/* Alereon 5310 */
 	{ USB_DEVICE_AND_INTERFACE_INFO(0x13dc, 0x5310, 0xe0, 0x02, 0x01),
 	  .driver_info = WUSB_QUIRK_ALEREON_HWA_CONCAT_ISOC |
diff --git a/drivers/usb/host/imx21-hcd.c b/drivers/usb/host/imx21-hcd.c
index f542045dc2a6..39ae7fb64b6f 100644
--- a/drivers/usb/host/imx21-hcd.c
+++ b/drivers/usb/host/imx21-hcd.c
@@ -1779,7 +1779,7 @@ static void imx21_hc_stop(struct usb_hcd *hcd)
 /* Driver glue		 			*/
 /* =========================================== */
 
-static struct hc_driver imx21_hc_driver = {
+static const struct hc_driver imx21_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "IMX21 USB Host Controller",
 	.hcd_priv_size = sizeof(struct imx21),
@@ -1849,8 +1849,10 @@ static int imx21_probe(struct platform_device *pdev)
 	if (!res)
 		return -ENODEV;
 	irq = platform_get_irq(pdev, 0);
-	if (irq < 0)
-		return -ENXIO;
+	if (irq < 0) {
+		dev_err(&pdev->dev, "Failed to get IRQ: %d\n", irq);
+		return irq;
+	}
 
 	hcd = usb_create_hcd(&imx21_hc_driver,
 		&pdev->dev, dev_name(&pdev->dev));
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index d089b3fb7a13..73fec38754f9 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1511,7 +1511,7 @@ static int isp116x_bus_resume(struct usb_hcd *hcd)
 
 #endif
 
-static struct hc_driver isp116x_hc_driver = {
+static const struct hc_driver isp116x_hc_driver = {
 	.description = hcd_name,
 	.product_desc = "ISP116x Host Controller",
 	.hcd_priv_size = sizeof(struct isp116x),
diff --git a/drivers/usb/host/isp1362-hcd.c b/drivers/usb/host/isp1362-hcd.c
index 0f2b4b358e1a..9b7e307e2d54 100644
--- a/drivers/usb/host/isp1362-hcd.c
+++ b/drivers/usb/host/isp1362-hcd.c
@@ -2591,7 +2591,7 @@ static int isp1362_hc_start(struct usb_hcd *hcd)
 
 /*-------------------------------------------------------------------------*/
 
-static struct hc_driver isp1362_hc_driver = {
+static const struct hc_driver isp1362_hc_driver = {
 	.description =		hcd_name,
 	.product_desc =		"ISP1362 Host Controller",
 	.hcd_priv_size =	sizeof(struct isp1362_hcd),
diff --git a/drivers/usb/host/max3421-hcd.c b/drivers/usb/host/max3421-hcd.c
index 369869a29ebd..0ece9a9341e5 100644
--- a/drivers/usb/host/max3421-hcd.c
+++ b/drivers/usb/host/max3421-hcd.c
@@ -1811,7 +1811,7 @@ max3421_unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb)
 {
 }
 
-static struct hc_driver max3421_hcd_desc = {
+static const struct hc_driver max3421_hcd_desc = {
 	.description =		"max3421",
 	.product_desc =		DRIVER_DESC,
 	.hcd_priv_size =	sizeof(struct max3421_hcd),
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index a4d814b7f380..91393ec7d850 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -53,7 +53,7 @@
 #define DRIVER_DESC "OHCI OMAP driver"
 
 #ifdef CONFIG_TPS65010
-#include <linux/i2c/tps65010.h>
+#include <linux/mfd/tps65010.h>
 #else
 
 #define LOW	0
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index c8f38649f749..658d9d1f9ea3 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -142,29 +142,30 @@ static int amd_chipset_sb_type_init(struct amd_chipset_info *pinfo)
 			pinfo->sb_type.gen = AMD_CHIPSET_SB700;
 		else if (rev >= 0x40 && rev <= 0x4f)
 			pinfo->sb_type.gen = AMD_CHIPSET_SB800;
-	}
-	pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
-					  0x145c, NULL);
-	if (pinfo->smbus_dev) {
-		pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
 	} else {
 		pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
 				PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
 
-		if (!pinfo->smbus_dev) {
-			pinfo->sb_type.gen = NOT_AMD_CHIPSET;
-			return 0;
+		if (pinfo->smbus_dev) {
+			rev = pinfo->smbus_dev->revision;
+			if (rev >= 0x11 && rev <= 0x14)
+				pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
+			else if (rev >= 0x15 && rev <= 0x18)
+				pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
+			else if (rev >= 0x39 && rev <= 0x3a)
+				pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
+		} else {
+			pinfo->smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+							  0x145c, NULL);
+			if (pinfo->smbus_dev) {
+				rev = pinfo->smbus_dev->revision;
+				pinfo->sb_type.gen = AMD_CHIPSET_TAISHAN;
+			} else {
+				pinfo->sb_type.gen = NOT_AMD_CHIPSET;
+				return 0;
+			}
 		}
-
-		rev = pinfo->smbus_dev->revision;
-		if (rev >= 0x11 && rev <= 0x14)
-			pinfo->sb_type.gen = AMD_CHIPSET_HUDSON2;
-		else if (rev >= 0x15 && rev <= 0x18)
-			pinfo->sb_type.gen = AMD_CHIPSET_BOLTON;
-		else if (rev >= 0x39 && rev <= 0x3a)
-			pinfo->sb_type.gen = AMD_CHIPSET_YANGTZE;
 	}
-
 	pinfo->sb_type.rev = rev;
 	return 1;
 }
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 7bf78be1fd32..5e5fc9d7d533 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -2312,7 +2312,7 @@ static int r8a66597_bus_resume(struct usb_hcd *hcd)
 #define	r8a66597_bus_resume	NULL
 #endif
 
-static struct hc_driver r8a66597_hc_driver = {
+static const struct hc_driver r8a66597_hc_driver = {
 	.description =		hcd_name,
 	.hcd_priv_size =	sizeof(struct r8a66597),
 	.irq =			r8a66597_irq,
diff --git a/drivers/usb/host/sl811-hcd.c b/drivers/usb/host/sl811-hcd.c
index fd2a11473be7..24ad1d6cec25 100644
--- a/drivers/usb/host/sl811-hcd.c
+++ b/drivers/usb/host/sl811-hcd.c
@@ -1554,7 +1554,7 @@ sl811h_start(struct usb_hcd *hcd)
 
 /*-------------------------------------------------------------------------*/
 
-static struct hc_driver sl811h_hc_driver = {
+static const struct hc_driver sl811h_hc_driver = {
 	.description =		hcd_name,
 	.hcd_priv_size =	sizeof(struct sl811),
 
diff --git a/drivers/usb/host/u132-hcd.c b/drivers/usb/host/u132-hcd.c
index 43d52931b5bf..c38855aed62c 100644
--- a/drivers/usb/host/u132-hcd.c
+++ b/drivers/usb/host/u132-hcd.c
@@ -2941,7 +2941,7 @@ static int u132_bus_resume(struct usb_hcd *hcd)
 #define u132_bus_suspend NULL
 #define u132_bus_resume NULL
 #endif
-static struct hc_driver u132_hc_driver = {
+static const struct hc_driver u132_hc_driver = {
 	.description = hcd_name,
 	.hcd_priv_size = sizeof(struct u132),
 	.irq = NULL,
diff --git a/drivers/usb/host/whci/hcd.c b/drivers/usb/host/whci/hcd.c
index 5b3603c360ab..cf84269c3e6d 100644
--- a/drivers/usb/host/whci/hcd.c
+++ b/drivers/usb/host/whci/hcd.c
@@ -213,7 +213,7 @@ static void whc_endpoint_reset(struct usb_hcd *usb_hcd,
 }
 
 
-static struct hc_driver whc_hc_driver = {
+static const struct hc_driver whc_hc_driver = {
 	.description = "whci-hcd",
 	.product_desc = "Wireless host controller",
 	.hcd_priv_size = sizeof(struct whc) - sizeof(struct usb_hcd),
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index 00721e8807ab..ad89a6d4111b 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1179,6 +1179,39 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 				break;
 			}
 
+			/*
+			 * For xHCI 1.1 according to section 4.19.1.2.4.1 a
+			 * root hub port's transition to compliance mode upon
+			 * detecting LFPS timeout may be controlled by an
+			 * Compliance Transition Enabled (CTE) flag (not
+			 * software visible). This flag is set by writing 0xA
+			 * to PORTSC PLS field which will allow transition to
+			 * compliance mode the next time LFPS timeout is
+			 * encountered. A warm reset will clear it.
+			 *
+			 * The CTE flag is only supported if the HCCPARAMS2 CTC
+			 * flag is set, otherwise, the compliance substate is
+			 * automatically entered as on 1.0 and prior.
+			 */
+			if (link_state == USB_SS_PORT_LS_COMP_MOD) {
+				if (!HCC2_CTC(xhci->hcc_params2)) {
+					xhci_dbg(xhci, "CTC flag is 0, port already supports entering compliance mode\n");
+					break;
+				}
+
+				if ((temp & PORT_CONNECT)) {
+					xhci_warn(xhci, "Can't set compliance mode when port is connected\n");
+					goto error;
+				}
+
+				xhci_dbg(xhci, "Enable compliance mode transition for port %d\n",
+						wIndex);
+				xhci_set_link_state(xhci, port_array, wIndex,
+						link_state);
+				temp = readl(port_array[wIndex]);
+				break;
+			}
+
 			/* Software should not attempt to set
 			 * port link state above '3' (U3) and the port
 			 * must be enabled.
@@ -1521,15 +1554,14 @@ static bool xhci_port_missing_cas_quirk(int port_index,
 int xhci_bus_resume(struct usb_hcd *hcd)
 {
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
-	int max_ports, port_index;
-	__le32 __iomem **port_array;
 	struct xhci_bus_state *bus_state;
-	u32 temp;
+	__le32 __iomem **port_array;
 	unsigned long flags;
-	unsigned long port_was_suspended = 0;
-	bool need_usb2_u3_exit = false;
+	int max_ports, port_index;
 	int slot_id;
 	int sret;
+	u32 next_state;
+	u32 temp, portsc;
 
 	max_ports = xhci_get_ports(hcd, &port_array);
 	bus_state = &xhci->bus_state[hcd_index(hcd)];
@@ -1548,68 +1580,77 @@ int xhci_bus_resume(struct usb_hcd *hcd)
 	temp &= ~CMD_EIE;
 	writel(temp, &xhci->op_regs->command);
 
+	/* bus specific resume for ports we suspended at bus_suspend */
+	if (hcd->speed >= HCD_USB3)
+		next_state = XDEV_U0;
+	else
+		next_state = XDEV_RESUME;
+
 	port_index = max_ports;
 	while (port_index--) {
-		/* Check whether need resume ports. If needed
-		   resume port and disable remote wakeup */
-		u32 temp;
-
-		temp = readl(port_array[port_index]);
+		portsc = readl(port_array[port_index]);
 
 		/* warm reset CAS limited ports stuck in polling/compliance */
 		if ((xhci->quirks & XHCI_MISSING_CAS) &&
 		    (hcd->speed >= HCD_USB3) &&
 		    xhci_port_missing_cas_quirk(port_index, port_array)) {
 			xhci_dbg(xhci, "reset stuck port %d\n", port_index);
+			clear_bit(port_index, &bus_state->bus_suspended);
 			continue;
 		}
-		if (DEV_SUPERSPEED_ANY(temp))
-			temp &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
-		else
-			temp &= ~(PORT_RWC_BITS | PORT_WAKE_BITS);
-		if (test_bit(port_index, &bus_state->bus_suspended) &&
-		    (temp & PORT_PLS_MASK)) {
-			set_bit(port_index, &port_was_suspended);
-			if (!DEV_SUPERSPEED_ANY(temp)) {
-				xhci_set_link_state(xhci, port_array,
-						port_index, XDEV_RESUME);
-				need_usb2_u3_exit = true;
+		/* resume if we suspended the link, and it is still suspended */
+		if (test_bit(port_index, &bus_state->bus_suspended))
+			switch (portsc & PORT_PLS_MASK) {
+			case XDEV_U3:
+				portsc = xhci_port_state_to_neutral(portsc);
+				portsc &= ~PORT_PLS_MASK;
+				portsc |= PORT_LINK_STROBE | next_state;
+				break;
+			case XDEV_RESUME:
+				/* resume already initiated */
+				break;
+			default:
+				/* not in a resumeable state, ignore it */
+				clear_bit(port_index,
+					  &bus_state->bus_suspended);
+				break;
 			}
-		} else
-			writel(temp, port_array[port_index]);
-	}
-
-	if (need_usb2_u3_exit) {
-		spin_unlock_irqrestore(&xhci->lock, flags);
-		msleep(USB_RESUME_TIMEOUT);
-		spin_lock_irqsave(&xhci->lock, flags);
+		/* disable wake for all ports, write new link state if needed */
+		portsc &= ~(PORT_RWC_BITS | PORT_CEC | PORT_WAKE_BITS);
+		writel(portsc, port_array[port_index]);
 	}
 
-	port_index = max_ports;
-	while (port_index--) {
-		if (!(port_was_suspended & BIT(port_index)))
-			continue;
-		/* Clear PLC to poll it later after XDEV_U0 */
-		xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC);
-		xhci_set_link_state(xhci, port_array, port_index, XDEV_U0);
+	/* USB2 specific resume signaling delay and U0 link state transition */
+	if (hcd->speed < HCD_USB3) {
+		if (bus_state->bus_suspended) {
+			spin_unlock_irqrestore(&xhci->lock, flags);
+			msleep(USB_RESUME_TIMEOUT);
+			spin_lock_irqsave(&xhci->lock, flags);
+		}
+		for_each_set_bit(port_index, &bus_state->bus_suspended,
+				 BITS_PER_LONG) {
+			/* Clear PLC to poll it later for U0 transition */
+			xhci_test_and_clear_bit(xhci, port_array, port_index,
+						PORT_PLC);
+			xhci_set_link_state(xhci, port_array, port_index,
+					    XDEV_U0);
+		}
 	}
 
-	port_index = max_ports;
-	while (port_index--) {
-		if (!(port_was_suspended & BIT(port_index)))
-			continue;
-		/* Poll and Clear PLC */
+	/* poll for U0 link state complete, both USB2 and USB3 */
+	for_each_set_bit(port_index, &bus_state->bus_suspended, BITS_PER_LONG) {
 		sret = xhci_handshake(port_array[port_index], PORT_PLC,
 				      PORT_PLC, 10 * 1000);
-		if (sret)
+		if (sret) {
 			xhci_warn(xhci, "port %d resume PLC timeout\n",
 				  port_index);
+			continue;
+		}
 		xhci_test_and_clear_bit(xhci, port_array, port_index, PORT_PLC);
 		slot_id = xhci_find_slot_id_by_port(hcd, xhci, port_index + 1);
 		if (slot_id)
 			xhci_ring_device(xhci, slot_id);
 	}
-
 	(void) readl(&xhci->op_regs->command);
 
 	bus_state->next_statechange = jiffies + msecs_to_jiffies(5);
diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index 67d5dc79b6b5..8fb60657ed4f 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -795,6 +795,7 @@ static const struct dev_pm_ops xhci_mtk_pm_ops = {
 #ifdef CONFIG_OF
 static const struct of_device_id mtk_xhci_of_match[] = {
 	{ .compatible = "mediatek,mt8173-xhci"},
+	{ .compatible = "mediatek,mtk-xhci"},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, mtk_xhci_of_match);
diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index c04144b25a67..163bafde709f 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -107,14 +107,6 @@ static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen2 = {
 };
 
 static const struct xhci_plat_priv xhci_plat_renesas_rcar_gen3 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2,
-	.init_quirk = xhci_rcar_init_quirk,
-	.plat_start = xhci_rcar_start,
-	.resume_quirk = xhci_rcar_resume_quirk,
-};
-
-static const struct xhci_plat_priv xhci_plat_renesas_rcar_r8a7796 = {
-	.firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3,
 	.init_quirk = xhci_rcar_init_quirk,
 	.plat_start = xhci_rcar_start,
 	.resume_quirk = xhci_rcar_resume_quirk,
@@ -145,7 +137,7 @@ static const struct of_device_id usb_xhci_of_match[] = {
 		.data = &xhci_plat_renesas_rcar_gen3,
 	}, {
 		.compatible = "renesas,xhci-r8a7796",
-		.data = &xhci_plat_renesas_rcar_r8a7796,
+		.data = &xhci_plat_renesas_rcar_gen3,
 	}, {
 		.compatible = "renesas,rcar-gen2-xhci",
 		.data = &xhci_plat_renesas_rcar_gen2,
diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
index 07278228214b..198bc188ab25 100644
--- a/drivers/usb/host/xhci-rcar.c
+++ b/drivers/usb/host/xhci-rcar.c
@@ -13,13 +13,15 @@
 #include <linux/platform_device.h>
 #include <linux/of.h>
 #include <linux/usb/phy.h>
+#include <linux/sys_soc.h>
 
 #include "xhci.h"
 #include "xhci-plat.h"
 #include "xhci-rcar.h"
 
 /*
-* - The V3 firmware is for r8a7796 (with good performance).
+* - The V3 firmware is for r8a7796 (with good performance) and r8a7795 es2.0
+*   or later.
 * - The V2 firmware can be used on both r8a7795 (es1.x) and r8a7796.
 * - The V2 firmware is possible to use on R-Car Gen2. However, the V2 causes
 *   performance degradation. So, this driver continues to use the V1 if R-Car
@@ -67,6 +69,26 @@ MODULE_FIRMWARE(XHCI_RCAR_FIRMWARE_NAME_V3);
 #define RCAR_USB3_RX_POL_VAL	BIT(21)
 #define RCAR_USB3_TX_POL_VAL	BIT(4)
 
+/* For soc_device_attribute */
+#define RCAR_XHCI_FIRMWARE_V2   BIT(0) /* FIRMWARE V2 */
+#define RCAR_XHCI_FIRMWARE_V3   BIT(1) /* FIRMWARE V3 */
+
+static const struct soc_device_attribute rcar_quirks_match[]  = {
+	{
+		.soc_id = "r8a7795", .revision = "ES1.*",
+		.data = (void *)RCAR_XHCI_FIRMWARE_V2,
+	},
+	{
+		.soc_id = "r8a7795",
+		.data = (void *)RCAR_XHCI_FIRMWARE_V3,
+	},
+	{
+		.soc_id = "r8a7796",
+		.data = (void *)RCAR_XHCI_FIRMWARE_V3,
+	},
+	{ /* sentinel */ },
+};
+
 static void xhci_rcar_start_gen2(struct usb_hcd *hcd)
 {
 	/* LCLK Select */
@@ -122,9 +144,23 @@ static int xhci_rcar_download_firmware(struct usb_hcd *hcd)
 	int retval, index, j, time;
 	int timeout = 10000;
 	u32 data, val, temp;
+	u32 quirks = 0;
+	const struct soc_device_attribute *attr;
+	const char *firmware_name;
+
+	attr = soc_device_match(rcar_quirks_match);
+	if (attr)
+		quirks = (uintptr_t)attr->data;
+
+	if (quirks & RCAR_XHCI_FIRMWARE_V2)
+		firmware_name = XHCI_RCAR_FIRMWARE_NAME_V2;
+	else if (quirks & RCAR_XHCI_FIRMWARE_V3)
+		firmware_name = XHCI_RCAR_FIRMWARE_NAME_V3;
+	else
+		firmware_name = priv->firmware_name;
 
 	/* request R-Car USB3.0 firmware */
-	retval = request_firmware(&fw, priv->firmware_name, dev);
+	retval = request_firmware(&fw, firmware_name, dev);
 	if (retval)
 		return retval;
 
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index cc368ad2b51e..a9443651ce0f 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1572,7 +1572,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
 {
 	struct usb_hcd *hcd;
 	u32 port_id;
-	u32 temp, temp1;
+	u32 portsc, cmd_reg;
 	int max_ports;
 	int slot_id;
 	unsigned int faked_port_index;
@@ -1636,26 +1636,28 @@ static void handle_port_status(struct xhci_hcd *xhci,
 	/* Find the faked port hub number */
 	faked_port_index = find_faked_portnum_from_hw_portnum(hcd, xhci,
 			port_id);
+	portsc = readl(port_array[faked_port_index]);
+
+	trace_xhci_handle_port_status(faked_port_index, portsc);
 
-	temp = readl(port_array[faked_port_index]);
 	if (hcd->state == HC_STATE_SUSPENDED) {
 		xhci_dbg(xhci, "resume root hub\n");
 		usb_hcd_resume_root_hub(hcd);
 	}
 
-	if (hcd->speed >= HCD_USB3 && (temp & PORT_PLS_MASK) == XDEV_INACTIVE)
+	if (hcd->speed >= HCD_USB3 && (portsc & PORT_PLS_MASK) == XDEV_INACTIVE)
 		bus_state->port_remote_wakeup &= ~(1 << faked_port_index);
 
-	if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_RESUME) {
+	if ((portsc & PORT_PLC) && (portsc & PORT_PLS_MASK) == XDEV_RESUME) {
 		xhci_dbg(xhci, "port resume event for port %d\n", port_id);
 
-		temp1 = readl(&xhci->op_regs->command);
-		if (!(temp1 & CMD_RUN)) {
+		cmd_reg = readl(&xhci->op_regs->command);
+		if (!(cmd_reg & CMD_RUN)) {
 			xhci_warn(xhci, "xHC is not running.\n");
 			goto cleanup;
 		}
 
-		if (DEV_SUPERSPEED_ANY(temp)) {
+		if (DEV_SUPERSPEED_ANY(portsc)) {
 			xhci_dbg(xhci, "remote wake SS port %d\n", port_id);
 			/* Set a flag to say the port signaled remote wakeup,
 			 * so we can tell the difference between the end of
@@ -1683,8 +1685,8 @@ static void handle_port_status(struct xhci_hcd *xhci,
 		}
 	}
 
-	if ((temp & PORT_PLC) && (temp & PORT_PLS_MASK) == XDEV_U0 &&
-			DEV_SUPERSPEED_ANY(temp)) {
+	if ((portsc & PORT_PLC) && (portsc & PORT_PLS_MASK) == XDEV_U0 &&
+			DEV_SUPERSPEED_ANY(portsc)) {
 		xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
 		/* We've just brought the device into U0 through either the
 		 * Resume state after a device remote wakeup, or through the
@@ -1714,7 +1716,7 @@ static void handle_port_status(struct xhci_hcd *xhci,
 	 * RExit to a disconnect state).  If so, let the the driver know it's
 	 * out of the RExit state.
 	 */
-	if (!DEV_SUPERSPEED_ANY(temp) &&
+	if (!DEV_SUPERSPEED_ANY(portsc) &&
 			test_and_clear_bit(faked_port_index,
 				&bus_state->rexit_ports)) {
 		complete(&bus_state->rexit_done[faked_port_index]);
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index 8ce96de10e8a..f20753b99624 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -453,6 +453,29 @@ DEFINE_EVENT(xhci_log_ring, xhci_inc_deq,
 	TP_PROTO(struct xhci_ring *ring),
 	TP_ARGS(ring)
 );
+
+DECLARE_EVENT_CLASS(xhci_log_portsc,
+		    TP_PROTO(u32 portnum, u32 portsc),
+		    TP_ARGS(portnum, portsc),
+		    TP_STRUCT__entry(
+				     __field(u32, portnum)
+				     __field(u32, portsc)
+				     ),
+		    TP_fast_assign(
+				   __entry->portnum = portnum;
+				   __entry->portsc = portsc;
+				   ),
+		    TP_printk("port-%d: %s",
+			      __entry->portnum,
+			      xhci_decode_portsc(__entry->portsc)
+			      )
+);
+
+DEFINE_EVENT(xhci_log_portsc, xhci_handle_port_status,
+	     TP_PROTO(u32 portnum, u32 portsc),
+	     TP_ARGS(portnum, portsc)
+);
+
 #endif /* __XHCI_TRACE_H */
 
 /* this part must be outside header guard */
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index e3e935291ed6..2abaa4d6d39d 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -311,12 +311,19 @@ struct xhci_op_regs {
  */
 #define PORT_PLS_MASK	(0xf << 5)
 #define XDEV_U0		(0x0 << 5)
+#define XDEV_U1		(0x1 << 5)
 #define XDEV_U2		(0x2 << 5)
 #define XDEV_U3		(0x3 << 5)
+#define XDEV_DISABLED	(0x4 << 5)
+#define XDEV_RXDETECT	(0x5 << 5)
 #define XDEV_INACTIVE	(0x6 << 5)
 #define XDEV_POLLING	(0x7 << 5)
-#define XDEV_COMP_MODE  (0xa << 5)
+#define XDEV_RECOVERY	(0x8 << 5)
+#define XDEV_HOT_RESET	(0x9 << 5)
+#define XDEV_COMP_MODE	(0xa << 5)
+#define XDEV_TEST_MODE	(0xb << 5)
 #define XDEV_RESUME	(0xf << 5)
+
 /* true: port has power (see HCC_PPC) */
 #define PORT_POWER	(1 << 9)
 /* bits 10:13 indicate device speed:
@@ -2392,6 +2399,87 @@ static inline const char *xhci_decode_slot_context(u32 info, u32 info2,
 	return str;
 }
 
+
+static inline const char *xhci_portsc_link_state_string(u32 portsc)
+{
+	switch (portsc & PORT_PLS_MASK) {
+	case XDEV_U0:
+		return "U0";
+	case XDEV_U1:
+		return "U1";
+	case XDEV_U2:
+		return "U2";
+	case XDEV_U3:
+		return "U3";
+	case XDEV_DISABLED:
+		return "Disabled";
+	case XDEV_RXDETECT:
+		return "RxDetect";
+	case XDEV_INACTIVE:
+		return "Inactive";
+	case XDEV_POLLING:
+		return "Polling";
+	case XDEV_RECOVERY:
+		return "Recovery";
+	case XDEV_HOT_RESET:
+		return "Hot Reset";
+	case XDEV_COMP_MODE:
+		return "Compliance mode";
+	case XDEV_TEST_MODE:
+		return "Test mode";
+	case XDEV_RESUME:
+		return "Resume";
+	default:
+		break;
+	}
+	return "Unknown";
+}
+
+static inline const char *xhci_decode_portsc(u32 portsc)
+{
+	static char str[256];
+	int ret;
+
+	ret = sprintf(str, "%s %s %s Link:%s ",
+		      portsc & PORT_POWER	? "Powered" : "Powered-off",
+		      portsc & PORT_CONNECT	? "Connected" : "Not-connected",
+		      portsc & PORT_PE		? "Enabled" : "Disabled",
+		      xhci_portsc_link_state_string(portsc));
+
+	if (portsc & PORT_OC)
+		ret += sprintf(str + ret, "OverCurrent ");
+	if (portsc & PORT_RESET)
+		ret += sprintf(str + ret, "In-Reset ");
+
+	ret += sprintf(str + ret, "Change: ");
+	if (portsc & PORT_CSC)
+		ret += sprintf(str + ret, "CSC ");
+	if (portsc & PORT_PEC)
+		ret += sprintf(str + ret, "PEC ");
+	if (portsc & PORT_WRC)
+		ret += sprintf(str + ret, "WRC ");
+	if (portsc & PORT_OCC)
+		ret += sprintf(str + ret, "OCC ");
+	if (portsc & PORT_RC)
+		ret += sprintf(str + ret, "PRC ");
+	if (portsc & PORT_PLC)
+		ret += sprintf(str + ret, "PLC ");
+	if (portsc & PORT_CEC)
+		ret += sprintf(str + ret, "CEC ");
+	if (portsc & PORT_CAS)
+		ret += sprintf(str + ret, "CAS ");
+
+	ret += sprintf(str + ret, "Wake: ");
+	if (portsc & PORT_WKCONN_E)
+		ret += sprintf(str + ret, "WCE ");
+	if (portsc & PORT_WKDISC_E)
+		ret += sprintf(str + ret, "WDE ");
+	if (portsc & PORT_WKOC_E)
+		ret += sprintf(str + ret, "WOE ");
+
+	return str;
+}
+
 static inline const char *xhci_ep_state_string(u8 state)
 {
 	switch (state) {