openwrtv4/target/linux/layerscape/patches-4.9/817-usb-support-layerscape.patch

From b14460ee524a34d3b94b44032b52155c4cd708e5 Mon Sep 17 00:00:00 2001
From: Yangbo Lu <yangbo.lu@nxp.com>
Date: Wed, 27 Sep 2017 10:34:07 +0800
Subject: [PATCH] usb: support layerscape

This is a integrated patch for layerscape usb support.

Signed-off-by: yinbo.zhu <yinbo.zhu@nxp.com>
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Signed-off-by: Changming Huang <jerry.huang@nxp.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Rajesh Bhagat <rajesh.bhagat@freescale.com>
Signed-off-by: Suresh Gupta <suresh.gupta@freescale.com>
Signed-off-by: Zhao Chenhui <chenhui.zhao@freescale.com>
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
---
 drivers/net/usb/r8152.c               |   4 +
 drivers/usb/common/common.c           |  50 ++++++
 drivers/usb/core/hub.c                |   8 +
 drivers/usb/dwc3/core.c               | 235 ++++++++++++++++++++++++++-
 drivers/usb/dwc3/core.h               |  46 +++++-
 drivers/usb/dwc3/host.c               |  15 +-
 drivers/usb/gadget/udc/fsl_udc_core.c |  46 +++---
 drivers/usb/gadget/udc/fsl_usb2_udc.h |  16 +-
 drivers/usb/host/Kconfig              |   2 +-
 drivers/usb/host/ehci-fsl.c           | 289 +++++++++++++++++++++++++++++++---
 drivers/usb/host/ehci-fsl.h           |   3 +
 drivers/usb/host/ehci-hub.c           |   2 +
 drivers/usb/host/ehci.h               |   5 +
 drivers/usb/host/fsl-mph-dr-of.c      |  12 ++
 drivers/usb/phy/phy-fsl-usb.c         |  59 +++++--
 drivers/usb/phy/phy-fsl-usb.h         |   8 +
 include/linux/usb.h                   |   1 +
 include/linux/usb/of.h                |   2 +
 18 files changed, 730 insertions(+), 73 deletions(-)

--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1812,6 +1812,10 @@ static int rx_bottom(struct r8152 *tp, i
 			unsigned int pkt_len;
 			struct sk_buff *skb;
 
+			/* limite the skb numbers for rx_queue */
+			if (unlikely(skb_queue_len(&tp->rx_queue) >= 1000))
+				break;
+
 			pkt_len = le32_to_cpu(rx_desc->opts1) & RX_LEN_MASK;
 			if (pkt_len < ETH_ZLEN)
 				break;
--- a/drivers/usb/common/common.c
+++ b/drivers/usb/common/common.c
@@ -105,6 +105,56 @@ static const char *const usb_dr_modes[]
 	[USB_DR_MODE_OTG]		= "otg",
 };
 
+/**
+ * of_usb_get_dr_mode - Get dual role mode for given device_node
+ * @np:        Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'dr_mode',
+ * and returns the correspondig enum usb_dr_mode
+ */
+enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np)
+{
+	const char *dr_mode;
+	int err, i;
+
+	err = of_property_read_string(np, "dr_mode", &dr_mode);
+	if (err < 0)
+		return USB_DR_MODE_UNKNOWN;
+
+	for (i = 0; i < ARRAY_SIZE(usb_dr_modes); i++)
+		if (!strcmp(dr_mode, usb_dr_modes[i]))
+			return i;
+
+	return USB_DR_MODE_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(of_usb_get_dr_mode);
+
+/**
+ * of_usb_get_maximum_speed - Get maximum requested speed for a given USB
+ * controller.
+ * @np: Pointer to the given device_node
+ *
+ * The function gets the maximum speed string from property "maximum-speed",
+ * and returns the corresponding enum usb_device_speed.
+ */
+enum usb_device_speed of_usb_get_maximum_speed(struct device_node *np)
+{
+	const char *maximum_speed;
+	int err;
+	int i;
+
+	err = of_property_read_string(np, "maximum-speed", &maximum_speed);
+	if (err < 0)
+		return USB_SPEED_UNKNOWN;
+
+	for (i = 0; i < ARRAY_SIZE(speed_names); i++)
+		if (strcmp(maximum_speed, speed_names[i]) == 0)
+			return i;
+
+		return USB_SPEED_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(of_usb_get_maximum_speed);
+
 static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
 {
 	int ret;
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -4415,6 +4415,14 @@ hub_port_init(struct usb_hub *hub, struc
 	else
 		speed = usb_speed_string(udev->speed);
 
+#if !defined(CONFIG_FSL_USB2_OTG) && !defined(CONFIG_FSL_USB2_OTG_MODULE)
+if (udev->speed != USB_SPEED_SUPER)
+	dev_info(&udev->dev,
+	"%s %s USB device number %d using %s\n",
+	 (udev->config) ? "reset" : "new", speed,
+	devnum, udev->bus->controller->driver->name);
+#endif
+
 	if (udev->speed < USB_SPEED_SUPER)
 		dev_info(&udev->dev,
 				"%s %s USB device number %d using %s\n",
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -58,6 +58,7 @@ static int dwc3_get_dr_mode(struct dwc3
 	enum usb_dr_mode mode;
 	struct device *dev = dwc->dev;
 	unsigned int hw_mode;
+	struct device_node      *node = dev->of_node;
 
 	if (dwc->dr_mode == USB_DR_MODE_UNKNOWN)
 		dwc->dr_mode = USB_DR_MODE_OTG;
@@ -83,6 +84,24 @@ static int dwc3_get_dr_mode(struct dwc3
 		mode = USB_DR_MODE_HOST;
 		break;
 	default:
+		/* Adjust Frame Length */
+		if (dwc->configure_gfladj)
+		dwc3_writel(dwc->regs, DWC3_GFLADJ, GFLADJ_30MHZ_REG_SEL |
+				GFLADJ_30MHZ(GFLADJ_30MHZ_DEFAULT));
+
+	/* Change burst beat and outstanding pipelined transfers requests */
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG0,
+		(dwc3_readl(dwc->regs, DWC3_GSBUSCFG0) & ~0xff) | 0xf);
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG1,
+		dwc3_readl(dwc->regs, DWC3_GSBUSCFG1) | 0xf00);
+
+	/* Enable Snooping */
+	if (node && of_dma_is_coherent(node)) {
+		dwc3_writel(dwc->regs, DWC3_GSBUSCFG0,
+		dwc3_readl(dwc->regs, DWC3_GSBUSCFG0) | 0x22220000);
+		dev_dbg(dev, "enabled snooping for usb\n");
+	}
+
 		if (IS_ENABLED(CONFIG_USB_DWC3_HOST))
 			mode = USB_DR_MODE_HOST;
 		else if (IS_ENABLED(CONFIG_USB_DWC3_GADGET))
@@ -213,8 +232,9 @@ static void dwc3_frame_length_adjustment
 
 	reg = dwc3_readl(dwc->regs, DWC3_GFLADJ);
 	dft = reg & DWC3_GFLADJ_30MHZ_MASK;
-	if (!dev_WARN_ONCE(dwc->dev, dft == dwc->fladj,
-	    "request value same as default, ignoring\n")) {
+	if (dft == dwc->fladj) {
+		dev_warn(dwc->dev, "request value same as default, ignoring\n");
+	} else {
 		reg &= ~DWC3_GFLADJ_30MHZ_MASK;
 		reg |= DWC3_GFLADJ_30MHZ_SDBND_SEL | dwc->fladj;
 		dwc3_writel(dwc->regs, DWC3_GFLADJ, reg);
@@ -579,6 +599,99 @@ static int dwc3_phy_setup(struct dwc3 *d
 	return 0;
 }
 
+/* set global soc bus configuration registers */
+static void dwc3_set_soc_bus_cfg(struct dwc3 *dwc)
+{
+	struct device *dev = dwc->dev;
+	u32 *vals;
+	u32 cfg;
+	int ntype;
+	int ret;
+	int i;
+
+	cfg = dwc3_readl(dwc->regs, DWC3_GSBUSCFG0);
+
+	/*
+	 * Handle property "snps,incr-burst-type-adjustment".
+	 * Get the number of value from this property:
+	 * result <= 0, means this property is not supported.
+	 * result = 1, means INCRx burst mode supported.
+	 * result > 1, means undefined length burst mode supported.
+	 */
+	ntype = device_property_read_u32_array(dev,
+			"snps,incr-burst-type-adjustment", NULL, 0);
+	if (ntype > 0) {
+		vals = kcalloc(ntype, sizeof(u32), GFP_KERNEL);
+		if (!vals) {
+			dev_err(dev, "Error to get memory\n");
+			return;
+		}
+		/* Get INCR burst type, and parse it */
+		ret = device_property_read_u32_array(dev,
+			"snps,incr-burst-type-adjustment", vals, ntype);
+		if (ret) {
+			dev_err(dev, "Error to get property\n");
+			return;
+		}
+		*(dwc->incrx_type + 1) = vals[0];
+		if (ntype > 1) {
+			*dwc->incrx_type = 1;
+			for (i = 1; i < ntype; i++) {
+				if (vals[i] > *(dwc->incrx_type + 1))
+					*(dwc->incrx_type + 1) = vals[i];
+			}
+		} else
+			*dwc->incrx_type = 0;
+
+		/* Enable Undefined Length INCR Burst and Enable INCRx Burst */
+		cfg &= ~DWC3_GSBUSCFG0_INCRBRST_MASK;
+		if (*dwc->incrx_type)
+			cfg |= DWC3_GSBUSCFG0_INCRBRSTENA;
+		switch (*(dwc->incrx_type + 1)) {
+		case 256:
+			cfg |= DWC3_GSBUSCFG0_INCR256BRSTENA;
+			break;
+		case 128:
+			cfg |= DWC3_GSBUSCFG0_INCR128BRSTENA;
+			break;
+		case 64:
+			cfg |= DWC3_GSBUSCFG0_INCR64BRSTENA;
+			break;
+		case 32:
+			cfg |= DWC3_GSBUSCFG0_INCR32BRSTENA;
+			break;
+		case 16:
+			cfg |= DWC3_GSBUSCFG0_INCR16BRSTENA;
+			break;
+		case 8:
+			cfg |= DWC3_GSBUSCFG0_INCR8BRSTENA;
+			break;
+		case 4:
+			cfg |= DWC3_GSBUSCFG0_INCR4BRSTENA;
+			break;
+		case 1:
+			break;
+		default:
+			dev_err(dev, "Invalid property\n");
+			break;
+		}
+	}
+
+	/* Handle usb snooping */
+	if (dwc->dma_snooping_quirk) {
+		cfg &= ~DWC3_GSBUSCFG0_SNP_MASK;
+		cfg |= (AXI3_CACHE_TYPE_SNP << DWC3_GSBUSCFG0_DATARD_SHIFT) |
+			(AXI3_CACHE_TYPE_SNP << DWC3_GSBUSCFG0_DESCRD_SHIFT) |
+			(AXI3_CACHE_TYPE_SNP << DWC3_GSBUSCFG0_DATAWR_SHIFT) |
+			(AXI3_CACHE_TYPE_SNP << DWC3_GSBUSCFG0_DESCWR_SHIFT);
+	}
+
+	dwc3_writel(dwc->regs, DWC3_GSBUSCFG0, cfg);
+
+}
+
+
+
 static void dwc3_core_exit(struct dwc3 *dwc)
 {
 	dwc3_event_buffers_cleanup(dwc);
@@ -721,6 +834,8 @@ static int dwc3_core_init(struct dwc3 *d
 	if (ret)
 		goto err1;
 
+	dwc3_set_soc_bus_cfg(dwc);
+
 	/* Adjust Frame Length */
 	dwc3_frame_length_adjustment(dwc);
 
@@ -919,11 +1034,109 @@ static void dwc3_core_exit_mode(struct d
 	}
 }
 
+static void dwc3_get_properties(struct dwc3 *dwc)
+{
+	struct device           *dev = dwc->dev;
+	struct device_node      *node = dev->of_node;
+	u8                      lpm_nyet_threshold;
+	u8                      tx_de_emphasis;
+	u8                      hird_threshold;
+
+	/* default to highest possible threshold */
+	lpm_nyet_threshold = 0xff;
+
+	/* default to -3.5dB de-emphasis */
+	tx_de_emphasis = 1;
+
+	/*
+	 * default to assert utmi_sleep_n and use maximum allowed HIRD
+	 * threshold value of 0b1100
+	 */
+	hird_threshold = 12;
+
+	dwc->maximum_speed = usb_get_maximum_speed(dev);
+	dwc->dr_mode = usb_get_dr_mode(dev);
+	dwc->hsphy_mode = of_usb_get_phy_mode(dev->of_node);
+
+	dwc->sysdev_is_parent = device_property_read_bool(dev,
+				"linux,sysdev_is_parent");
+	if (dwc->sysdev_is_parent)
+		dwc->sysdev = dwc->dev->parent;
+	else
+		dwc->sysdev = dwc->dev;
+
+	dwc->has_lpm_erratum = device_property_read_bool(dev,
+				"snps,has-lpm-erratum");
+	device_property_read_u8(dev, "snps,lpm-nyet-threshold",
+				&lpm_nyet_threshold);
+	dwc->is_utmi_l1_suspend = device_property_read_bool(dev,
+				"snps,is-utmi-l1-suspend");
+	device_property_read_u8(dev, "snps,hird-threshold",
+				&hird_threshold);
+	dwc->usb3_lpm_capable = device_property_read_bool(dev,
+				"snps,usb3_lpm_capable");
+
+	dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
+
+	dwc->configure_gfladj =
+				of_property_read_bool(node, "configure-gfladj");
+	dwc->dr_mode = usb_get_dr_mode(dev);
+
+	dwc->disable_scramble_quirk = device_property_read_bool(dev,
+				"snps,disable_scramble_quirk");
+	dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
+				"snps,u2exit_lfps_quirk");
+	dwc->u2ss_inp3_quirk = device_property_read_bool(dev,
+				"snps,u2ss_inp3_quirk");
+	dwc->req_p1p2p3_quirk = device_property_read_bool(dev,
+				"snps,req_p1p2p3_quirk");
+	dwc->del_p1p2p3_quirk = device_property_read_bool(dev,
+				"snps,del_p1p2p3_quirk");
+	dwc->del_phy_power_chg_quirk = device_property_read_bool(dev,
+				"snps,del_phy_power_chg_quirk");
+	dwc->lfps_filter_quirk = device_property_read_bool(dev,
+				"snps,lfps_filter_quirk");
+	dwc->rx_detect_poll_quirk = device_property_read_bool(dev,
+				"snps,rx_detect_poll_quirk");
+	dwc->dis_u3_susphy_quirk = device_property_read_bool(dev,
+				"snps,dis_u3_susphy_quirk");
+	dwc->dis_u2_susphy_quirk = device_property_read_bool(dev,
+				"snps,dis_u2_susphy_quirk");
+	dwc->dis_enblslpm_quirk = device_property_read_bool(dev,
+				"snps,dis_enblslpm_quirk");
+	dwc->dis_rxdet_inp3_quirk = device_property_read_bool(dev,
+				"snps,dis_rxdet_inp3_quirk");
+	dwc->dis_u2_freeclk_exists_quirk = device_property_read_bool(dev,
+				"snps,dis-u2-freeclk-exists-quirk");
+	dwc->dis_del_phy_power_chg_quirk = device_property_read_bool(dev,
+				"snps,dis-del-phy-power-chg-quirk");
+	dwc->dma_snooping_quirk = device_property_read_bool(dev,
+				"snps,dma-snooping");
+
+	dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
+				"snps,tx_de_emphasis_quirk");
+	device_property_read_u8(dev, "snps,tx_de_emphasis",
+				&tx_de_emphasis);
+	device_property_read_string(dev, "snps,hsphy_interface",
+				&dwc->hsphy_interface);
+	device_property_read_u32(dev, "snps,quirk-frame-length-adjustment",
+				&dwc->fladj);
+
+	dwc->lpm_nyet_threshold = lpm_nyet_threshold;
+	dwc->tx_de_emphasis = tx_de_emphasis;
+
+	dwc->hird_threshold = hird_threshold
+		| (dwc->is_utmi_l1_suspend << 4);
+
+	dwc->imod_interval = 0;
+}
+
 #define DWC3_ALIGN_MASK		(16 - 1)
 
 static int dwc3_probe(struct platform_device *pdev)
 {
 	struct device		*dev = &pdev->dev;
+	struct device_node      *node = dev->of_node;
 	struct resource		*res;
 	struct dwc3		*dwc;
 	u8			lpm_nyet_threshold;
@@ -955,6 +1168,11 @@ static int dwc3_probe(struct platform_de
 	dwc->xhci_resources[0].flags = res->flags;
 	dwc->xhci_resources[0].name = res->name;
 
+	if (node) {
+		dwc->configure_gfladj =
+			of_property_read_bool(node, "configure-gfladj");
+	}
+
 	res->start += DWC3_GLOBALS_REGS_START;
 
 	/*
@@ -997,6 +1215,12 @@ static int dwc3_probe(struct platform_de
 	dwc->usb3_lpm_capable = device_property_read_bool(dev,
 				"snps,usb3_lpm_capable");
 
+	dwc->needs_fifo_resize = of_property_read_bool(node, "tx-fifo-resize");
+
+	dwc->configure_gfladj =
+			of_property_read_bool(node, "configure-gfladj");
+	dwc->dr_mode = of_usb_get_dr_mode(node);
+
 	dwc->disable_scramble_quirk = device_property_read_bool(dev,
 				"snps,disable_scramble_quirk");
 	dwc->u2exit_lfps_quirk = device_property_read_bool(dev,
@@ -1041,6 +1265,8 @@ static int dwc3_probe(struct platform_de
 	dwc->hird_threshold = hird_threshold
 		| (dwc->is_utmi_l1_suspend << 4);
 
+	dwc3_get_properties(dwc);
+
 	platform_set_drvdata(pdev, dwc);
 	dwc3_cache_hwparams(dwc);
 
@@ -1064,6 +1290,11 @@ static int dwc3_probe(struct platform_de
 	if (ret < 0)
 		goto err1;
 
+	/* Adjust Frame Length */
+	if (dwc->configure_gfladj)
+	dwc3_writel(dwc->regs, DWC3_GFLADJ, GFLADJ_30MHZ_REG_SEL |
+		    GFLADJ_30MHZ(GFLADJ_30MHZ_DEFAULT));
+
 	pm_runtime_forbid(dev);
 
 	ret = dwc3_alloc_event_buffers(dwc, DWC3_EVENT_BUFFERS_SIZE);
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -26,6 +26,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/mm.h>
 #include <linux/debugfs.h>
+#include <linux/of_address.h>
 
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
@@ -154,6 +155,32 @@
 
 /* Bit fields */
 
+/* Global SoC Bus Configuration Register 0 */
+#define AXI3_CACHE_TYPE_AW		0x8 /* write allocate */
+#define AXI3_CACHE_TYPE_AR		0x4 /* read allocate */
+#define AXI3_CACHE_TYPE_SNP		0x2 /* cacheable */
+#define AXI3_CACHE_TYPE_BUF		0x1 /* bufferable */
+#define DWC3_GSBUSCFG0_DATARD_SHIFT	28
+#define DWC3_GSBUSCFG0_DESCRD_SHIFT	24
+#define DWC3_GSBUSCFG0_DATAWR_SHIFT	20
+#define DWC3_GSBUSCFG0_DESCWR_SHIFT	16
+#define DWC3_GSBUSCFG0_SNP_MASK		0xffff0000
+#define DWC3_GSBUSCFG0_DATABIGEND	(1 << 11)
+#define DWC3_GSBUSCFG0_DESCBIGEND	(1 << 10)
+#define DWC3_GSBUSCFG0_INCR256BRSTENA	(1 << 7) /* INCR256 burst */
+#define DWC3_GSBUSCFG0_INCR128BRSTENA	(1 << 6) /* INCR128 burst */
+#define DWC3_GSBUSCFG0_INCR64BRSTENA	(1 << 5) /* INCR64 burst */
+#define DWC3_GSBUSCFG0_INCR32BRSTENA	(1 << 4) /* INCR32 burst */
+#define DWC3_GSBUSCFG0_INCR16BRSTENA	(1 << 3) /* INCR16 burst */
+#define DWC3_GSBUSCFG0_INCR8BRSTENA	(1 << 2) /* INCR8 burst */
+#define DWC3_GSBUSCFG0_INCR4BRSTENA	(1 << 1) /* INCR4 burst */
+#define DWC3_GSBUSCFG0_INCRBRSTENA	(1 << 0) /* undefined length enable */
+#define DWC3_GSBUSCFG0_INCRBRST_MASK	0xff
+
+/* Global SoC Bus Configuration Register 1 */
+#define DWC3_GSBUSCFG1_1KPAGEENA	(1 << 12) /* 1K page boundary enable */
+#define DWC3_GSBUSCFG1_PTRANSLIMIT_MASK	0xf00
+
 /* Global Debug Queue/FIFO Space Available Register */
 #define DWC3_GDBGFIFOSPACE_NUM(n)	((n) & 0x1f)
 #define DWC3_GDBGFIFOSPACE_TYPE(n)	(((n) << 5) & 0x1e0)
@@ -180,7 +207,6 @@
 #define DWC3_GCTL_CLK_PIPE	(1)
 #define DWC3_GCTL_CLK_PIPEHALF	(2)
 #define DWC3_GCTL_CLK_MASK	(3)
-
 #define DWC3_GCTL_PRTCAP(n)	(((n) & (3 << 12)) >> 12)
 #define DWC3_GCTL_PRTCAPDIR(n)	((n) << 12)
 #define DWC3_GCTL_PRTCAP_HOST	1
@@ -289,6 +315,10 @@
 /* Global Frame Length Adjustment Register */
 #define DWC3_GFLADJ_30MHZ_SDBND_SEL		(1 << 7)
 #define DWC3_GFLADJ_30MHZ_MASK			0x3f
+#define GFLADJ_30MHZ_REG_SEL           (1 << 7)
+#define GFLADJ_30MHZ(n)                        ((n) & 0x3f)
+#define GFLADJ_30MHZ_DEFAULT           0x20
+
 
 /* Global User Control Register 2 */
 #define DWC3_GUCTL2_RST_ACTBITLATER		(1 << 14)
@@ -753,6 +783,7 @@ struct dwc3_scratchpad_array {
  * @regs: base address for our registers
  * @regs_size: address space size
  * @fladj: frame length adjustment
+ * @incrx_type: INCR burst type adjustment
  * @irq_gadget: peripheral controller's IRQ number
  * @nr_scratch: number of scratch buffers
  * @u1u2: only used on revisions <1.83a for workaround
@@ -847,6 +878,7 @@ struct dwc3 {
 	spinlock_t		lock;
 
 	struct device		*dev;
+	struct device           *sysdev;
 
 	struct platform_device	*xhci;
 	struct resource		xhci_resources[DWC3_XHCI_RESOURCES_NUM];
@@ -872,6 +904,12 @@ struct dwc3 {
 	enum usb_phy_interface	hsphy_mode;
 
 	u32			fladj;
+	/*
+	 * For INCR burst type.
+	 * First field: for undefined length INCR burst type enable.
+	 * Second field: for INCRx burst type enable
+	 */
+	u32			incrx_type[2];
 	u32			irq_gadget;
 	u32			nr_scratch;
 	u32			u1u2;
@@ -948,9 +986,12 @@ struct dwc3 {
 	unsigned		ep0_bounced:1;
 	unsigned		ep0_expect_in:1;
 	unsigned		has_hibernation:1;
+	unsigned		sysdev_is_parent:1;
 	unsigned		has_lpm_erratum:1;
 	unsigned		is_utmi_l1_suspend:1;
 	unsigned		is_fpga:1;
+	unsigned		needs_fifo_resize:1;
+	unsigned		configure_gfladj:1;
 	unsigned		pending_events:1;
 	unsigned		pullups_connected:1;
 	unsigned		setup_packet_pending:1;
@@ -971,9 +1012,12 @@ struct dwc3 {
 	unsigned		dis_rxdet_inp3_quirk:1;
 	unsigned		dis_u2_freeclk_exists_quirk:1;
 	unsigned		dis_del_phy_power_chg_quirk:1;
+	unsigned		dma_snooping_quirk:1;
 
 	unsigned		tx_de_emphasis_quirk:1;
 	unsigned		tx_de_emphasis:2;
+
+	u16                     imod_interval;
 };
 
 /* -------------------------------------------------------------------------- */
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -17,6 +17,8 @@
 
 #include <linux/platform_device.h>
 
+#include <linux/of_device.h>
+
 #include "core.h"
 
 int dwc3_host_init(struct dwc3 *dwc)
@@ -73,12 +75,21 @@ int dwc3_host_init(struct dwc3 *dwc)
 		return -ENOMEM;
 	}
 
-	dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
+	if (IS_ENABLED(CONFIG_OF) && dwc->dev->of_node)
+		of_dma_configure(&xhci->dev, dwc->dev->of_node);
+	else
+		dma_set_coherent_mask(&xhci->dev, dwc->dev->coherent_dma_mask);
 
-	xhci->dev.parent	= dwc->dev;
+	xhci->dev.parent        = dwc->dev;
 	xhci->dev.dma_mask	= dwc->dev->dma_mask;
 	xhci->dev.dma_parms	= dwc->dev->dma_parms;
 
+	/* set DMA operations */
+	if (dwc->dev->of_node && of_dma_is_coherent(dwc->dev->of_node)) {
+		xhci->dev.archdata.dma_ops = dwc->dev->archdata.dma_ops;
+		dev_dbg(dwc->dev, "set dma_ops for usb\n");
+	}
+
 	dwc->xhci = xhci;
 
 	ret = platform_device_add_resources(xhci, dwc->xhci_resources,
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -198,7 +198,11 @@ __acquires(ep->udc->lock)
 
 	spin_unlock(&ep->udc->lock);
 
-	usb_gadget_giveback_request(&ep->ep, &req->req);
+	/* this complete() should a func implemented by gadget layer,
+	 * eg fsg->bulk_in_complete()
+	 */
+	if (req->req.complete)
+		usb_gadget_giveback_request(&ep->ep, &req->req);
 
 	spin_lock(&ep->udc->lock);
 	ep->stopped = stopped;
@@ -245,10 +249,10 @@ static int dr_controller_setup(struct fs
 		if (udc->pdata->have_sysif_regs) {
 			if (udc->pdata->controller_ver) {
 				/* controller version 1.6 or above */
-				ctrl = __raw_readl(&usb_sys_regs->control);
+				ctrl = ioread32be(&usb_sys_regs->control);
 				ctrl &= ~USB_CTRL_UTMI_PHY_EN;
 				ctrl |= USB_CTRL_USB_EN;
-				__raw_writel(ctrl, &usb_sys_regs->control);
+				iowrite32be(ctrl, &usb_sys_regs->control);
 			}
 		}
 		portctrl |= PORTSCX_PTS_ULPI;
@@ -257,13 +261,14 @@ static int dr_controller_setup(struct fs
 		portctrl |= PORTSCX_PTW_16BIT;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
+	case FSL_USB2_PHY_UTMI_DUAL:
 		if (udc->pdata->have_sysif_regs) {
 			if (udc->pdata->controller_ver) {
 				/* controller version 1.6 or above */
-				ctrl = __raw_readl(&usb_sys_regs->control);
+				ctrl = ioread32be(&usb_sys_regs->control);
 				ctrl |= (USB_CTRL_UTMI_PHY_EN |
 					USB_CTRL_USB_EN);
-				__raw_writel(ctrl, &usb_sys_regs->control);
+				iowrite32be(ctrl, &usb_sys_regs->control);
 				mdelay(FSL_UTMI_PHY_DLY); /* Delay for UTMI
 					PHY CLK to become stable - 10ms*/
 			}
@@ -329,22 +334,22 @@ static int dr_controller_setup(struct fs
 	/* Config control enable i/o output, cpu endian register */
 #ifndef CONFIG_ARCH_MXC
 	if (udc->pdata->have_sysif_regs) {
-		ctrl = __raw_readl(&usb_sys_regs->control);
+		ctrl = ioread32be(&usb_sys_regs->control);
 		ctrl |= USB_CTRL_IOENB;
-		__raw_writel(ctrl, &usb_sys_regs->control);
+		iowrite32be(ctrl, &usb_sys_regs->control);
 	}
 #endif
 
-#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
+#if !defined(CONFIG_NOT_COHERENT_CACHE)
 	/* Turn on cache snooping hardware, since some PowerPC platforms
 	 * wholly rely on hardware to deal with cache coherent. */
 
 	if (udc->pdata->have_sysif_regs) {
 		/* Setup Snooping for all the 4GB space */
 		tmp = SNOOP_SIZE_2GB;	/* starts from 0x0, size 2G */
-		__raw_writel(tmp, &usb_sys_regs->snoop1);
+		iowrite32be(tmp, &usb_sys_regs->snoop1);
 		tmp |= 0x80000000;	/* starts from 0x8000000, size 2G */
-		__raw_writel(tmp, &usb_sys_regs->snoop2);
+		iowrite32be(tmp, &usb_sys_regs->snoop2);
 	}
 #endif
 
@@ -1057,7 +1062,7 @@ static int fsl_ep_fifo_status(struct usb
 	struct ep_queue_head *qh;
 
 	ep = container_of(_ep, struct fsl_ep, ep);
-	if (!_ep || (!ep->ep.desc && ep_index(ep) != 0))
+	if (!_ep || !ep->ep.desc || (ep_index(ep) == 0))
 		return -ENODEV;
 
 	udc = (struct fsl_udc *)ep->udc;
@@ -1599,14 +1604,13 @@ static int process_ep_req(struct fsl_udc
 		struct fsl_req *curr_req)
 {
 	struct ep_td_struct *curr_td;
-	int	td_complete, actual, remaining_length, j, tmp;
+	int	actual, remaining_length, j, tmp;
 	int	status = 0;
 	int	errors = 0;
 	struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
 	int direction = pipe % 2;
 
 	curr_td = curr_req->head;
-	td_complete = 0;
 	actual = curr_req->req.length;
 
 	for (j = 0; j < curr_req->dtd_count; j++) {
@@ -1651,11 +1655,9 @@ static int process_ep_req(struct fsl_udc
 				status = -EPROTO;
 				break;
 			} else {
-				td_complete++;
 				break;
 			}
 		} else {
-			td_complete++;
 			VDBG("dTD transmitted successful");
 		}
 
@@ -1698,7 +1700,7 @@ static void dtd_complete_irq(struct fsl_
 		curr_ep = get_ep_by_pipe(udc, i);
 
 		/* If the ep is configured */
-		if (curr_ep->name == NULL) {
+		if (strncmp(curr_ep->name, "ep", 2)) {
 			WARNING("Invalid EP?");
 			continue;
 		}
@@ -2420,10 +2422,12 @@ static int fsl_udc_probe(struct platform
 		usb_sys_regs = (void *)dr_regs + USB_DR_SYS_OFFSET;
 #endif
 
+#ifdef CONFIG_ARCH_MXC
 	/* Initialize USB clocks */
 	ret = fsl_udc_clk_init(pdev);
 	if (ret < 0)
 		goto err_iounmap_noclk;
+#endif
 
 	/* Read Device Controller Capability Parameters register */
 	dccparams = fsl_readl(&dr_regs->dccparams);
@@ -2463,9 +2467,11 @@ static int fsl_udc_probe(struct platform
 		dr_controller_setup(udc_controller);
 	}
 
+#ifdef CONFIG_ARCH_MXC
 	ret = fsl_udc_clk_finalize(pdev);
 	if (ret)
 		goto err_free_irq;
+#endif
 
 	/* Setup gadget structure */
 	udc_controller->gadget.ops = &fsl_gadget_ops;
@@ -2478,6 +2484,7 @@ static int fsl_udc_probe(struct platform
 	/* Setup gadget.dev and register with kernel */
 	dev_set_name(&udc_controller->gadget.dev, "gadget");
 	udc_controller->gadget.dev.of_node = pdev->dev.of_node;
+	set_dma_ops(&udc_controller->gadget.dev, pdev->dev.archdata.dma_ops);
 
 	if (!IS_ERR_OR_NULL(udc_controller->transceiver))
 		udc_controller->gadget.is_otg = 1;
@@ -2529,7 +2536,9 @@ err_free_irq:
 err_iounmap:
 	if (pdata->exit)
 		pdata->exit(pdev);
+#ifdef CONFIG_ARCH_MXC
 	fsl_udc_clk_release();
+#endif
 err_iounmap_noclk:
 	iounmap(dr_regs);
 err_release_mem_region:
@@ -2557,8 +2566,9 @@ static int fsl_udc_remove(struct platfor
 	udc_controller->done = &done;
 	usb_del_gadget_udc(&udc_controller->gadget);
 
+#ifdef CONFIG_ARCH_MXC
 	fsl_udc_clk_release();
-
+#endif
 	/* DR has been stopped in usb_gadget_unregister_driver() */
 	remove_proc_file();
 
@@ -2570,7 +2580,7 @@ static int fsl_udc_remove(struct platfor
 	dma_pool_destroy(udc_controller->td_pool);
 	free_irq(udc_controller->irq, udc_controller);
 	iounmap(dr_regs);
-	if (pdata->operating_mode == FSL_USB2_DR_DEVICE)
+	if (res && (pdata->operating_mode == FSL_USB2_DR_DEVICE))
 		release_mem_region(res->start, resource_size(res));
 
 	/* free udc --wait for the release() finished */
--- a/drivers/usb/gadget/udc/fsl_usb2_udc.h
+++ b/drivers/usb/gadget/udc/fsl_usb2_udc.h
@@ -20,6 +20,10 @@
 #define USB_MAX_CTRL_PAYLOAD		64
 #define USB_DR_SYS_OFFSET		0x400
 
+#ifdef CONFIG_SOC_LS1021A
+#undef CONFIG_ARCH_MXC
+#endif
+
  /* USB DR device mode registers (Little Endian) */
 struct usb_dr_device {
 	/* Capability register */
@@ -597,18 +601,6 @@ struct platform_device;
 int fsl_udc_clk_init(struct platform_device *pdev);
 int fsl_udc_clk_finalize(struct platform_device *pdev);
 void fsl_udc_clk_release(void);
-#else
-static inline int fsl_udc_clk_init(struct platform_device *pdev)
-{
-	return 0;
-}
-static inline int fsl_udc_clk_finalize(struct platform_device *pdev)
-{
-	return 0;
-}
-static inline void fsl_udc_clk_release(void)
-{
-}
 #endif
 
 #endif
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -165,7 +165,7 @@ config XPS_USB_HCD_XILINX
 
 config USB_EHCI_FSL
 	tristate "Support for Freescale PPC on-chip EHCI USB controller"
-	depends on FSL_SOC
+	depends on USB_EHCI_HCD
 	select USB_EHCI_ROOT_HUB_TT
 	---help---
 	  Variation of ARC USB block used in some Freescale chips.
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -37,13 +37,141 @@
 #include <linux/fsl_devices.h>
 #include <linux/of_platform.h>
 
+#ifdef CONFIG_PPC
+#include <asm/fsl_pm.h>
+#include <linux/suspend.h>
+#endif
+
 #include "ehci.h"
 #include "ehci-fsl.h"
 
+#define FSL_USB_PHY_ADDR       0xffe214000
+
+struct ccsr_usb_port_ctrl {
+	u32     ctrl;
+	u32     drvvbuscfg;
+	u32     pwrfltcfg;
+	u32     sts;
+	u8      res_14[0xc];
+	u32     bistcfg;
+	u32     biststs;
+	u32     abistcfg;
+	u32     abiststs;
+	u8      res_30[0x10];
+	u32     xcvrprg;
+	u32     anaprg;
+	u32     anadrv;
+	u32     anasts;
+};
+
+struct ccsr_usb_phy {
+	u32     id;
+	struct ccsr_usb_port_ctrl port1;
+	u8      res_50[0xc];
+	u32     tvr;
+	u32     pllprg[4];
+	u8      res_70[0x4];
+	u32     anaccfg;
+	u32     dbg;
+	u8      res_7c[0x4];
+	struct ccsr_usb_port_ctrl port2;
+	u8      res_dc[0x334];
+};
+
 #define DRIVER_DESC "Freescale EHCI Host controller driver"
 #define DRV_NAME "ehci-fsl"
 
 static struct hc_driver __read_mostly fsl_ehci_hc_driver;
+struct ehci_fsl {
+       /* store current hcd state for otg;
+	* have_hcd is true when host drv al already part of otg framework,
+	* otherwise false;
+	* hcd_add is true when otg framework wants to add host
+	* drv as part of otg;flase when it wants to remove it
+	*/
+unsigned have_hcd:1;
+unsigned hcd_add:1;
+};
+
+static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
+{
+struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+return container_of(ehci, struct ehci_fsl, ehci);
+}
+
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+static void do_change_hcd(struct work_struct *work)
+{
+struct ehci_hcd *ehci = container_of(work, struct ehci_hcd,
+				     change_hcd_work);
+struct usb_hcd *hcd = ehci_to_hcd(ehci);
+struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+void __iomem *non_ehci = hcd->regs;
+int retval;
+
+	if (ehci_fsl->hcd_add && !ehci_fsl->have_hcd) {
+	writel(USBMODE_CM_HOST, non_ehci + FSL_SOC_USB_USBMODE);
+	/* host, gadget and otg share same int line */
+	retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+	if (retval == 0)
+	ehci_fsl->have_hcd = 1;
+	} else if (!ehci_fsl->hcd_add && ehci_fsl->have_hcd) {
+		usb_remove_hcd(hcd);
+		ehci_fsl->have_hcd = 0;
+	}
+}
+#endif
+
+struct ehci_fsl {
+	struct ehci_hcd ehci;
+
+#ifdef CONFIG_PM
+struct ehci_regs saved_regs;
+struct ccsr_usb_phy saved_phy_regs;
+/* Saved USB PHY settings, need to restore after deep sleep. */
+u32 usb_ctrl;
+#endif
+	/*
+	 * store current hcd state for otg;
+	 * have_hcd is true when host drv al already part of otg framework,
+	 * otherwise false;
+	 * hcd_add is true when otg framework wants to add host
+	 * drv as part of otg;flase when it wants to remove it
+	 */
+unsigned have_hcd:1;
+unsigned hcd_add:1;
+};
+
+static strut ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
+{
+struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+return container_of(ehci, struct ehci_fsl, ehci);
+}
+
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+static void do_change_hcd(struct work_struct *work)
+{
+struct ehci_hcd *ehci = container_of(work, struct ehci_hcd,
+change_hcd_work);
+struct usb_hcd *hcd = ehci_to_hcd(ehci);
+struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+void __iomem *non_ehci = hcd->regs;
+int retval;
+
+if (ehci_fsl->hcd_add && !ehci_fsl->have_hcd) {
+writel(USBMODE_CM_HOST, non_ehci + FSL_SOC_USB_USBMODE);
+/* host, gadget and otg share same int line */
+retval = usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
+if (retval == 0)
+ehci_fsl->have_hcd = 1;
+} else if (!ehci_fsl->hcd_add && ehci_fsl->have_hcd) {
+	usb_remove_hcd(hcd);
+ehci_fsl->have_hcd = 0;
+}
+}
+#endif
 
 /* configure so an HC device and id are always provided */
 /* always called with process context; sleeping is OK */
@@ -131,6 +259,12 @@ static int fsl_ehci_drv_probe(struct pla
 		clrsetbits_be32(hcd->regs + FSL_SOC_USB_CTRL,
 				CONTROL_REGISTER_W1C_MASK, 0x4);
 
+	/* Set USB_EN bit to select ULPI phy for USB controller version 2.5 */
+	if (pdata->controller_ver == FSL_USB_VER_2_5 &&
+		pdata->phy_mode == FSL_USB2_PHY_ULPI)
+		iowrite32be(USB_CTRL_USB_EN, hcd->regs + FSL_SOC_USB_CTRL);
+
+
 	/*
 	 * Enable UTMI phy and program PTS field in UTMI mode before asserting
 	 * controller reset for USB Controller version 2.5
@@ -143,16 +277,20 @@ static int fsl_ehci_drv_probe(struct pla
 
 	/* Don't need to set host mode here. It will be done by tdi_reset() */
 
-	retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
+	retval = usb_add_hcd(hcd, irq, IRQF_SHARED | IRQF_NO_SUSPEND);
 	if (retval != 0)
 		goto err2;
 	device_wakeup_enable(hcd->self.controller);
 
-#ifdef CONFIG_USB_OTG
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
 	if (pdata->operating_mode == FSL_USB2_DR_OTG) {
 		struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+		struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 
 		hcd->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
+
+		INIT_WORK(&ehci->change_hcd_work, do_change_hcd);
+
 		dev_dbg(&pdev->dev, "hcd=0x%p  ehci=0x%p, phy=0x%p\n",
 			hcd, ehci, hcd->usb_phy);
 
@@ -168,6 +306,11 @@ static int fsl_ehci_drv_probe(struct pla
 			retval = -ENODEV;
 			goto err2;
 		}
+
+		ehci_fsl->have_hcd = 1;
+	} else {
+		dev_err(&pdev->dev, "wrong operating mode\n");
+		return -ENODEV;
 	}
 #endif
 	return retval;
@@ -181,6 +324,18 @@ static int fsl_ehci_drv_probe(struct pla
 	return retval;
 }
 
+static bool usb_phy_clk_valid(struct usb_hcd *hcd,
+			enum fsl_usb2_phy_modes phy_mode)
+{
+	void __iomem *non_ehci = hcd->regs;
+	bool ret = true;
+
+	if (!(in_be32(non_ehci + FSL_SOC_USB_CTRL) & PHY_CLK_VALID))
+		ret = false;
+
+	return ret;
+}
+
 static int ehci_fsl_setup_phy(struct usb_hcd *hcd,
 			       enum fsl_usb2_phy_modes phy_mode,
 			       unsigned int port_offset)
@@ -219,6 +374,21 @@ static int ehci_fsl_setup_phy(struct usb
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
 	case FSL_USB2_PHY_UTMI_DUAL:
+		if (pdata->has_fsl_erratum_a006918) {
+			pr_warn("fsl-ehci: USB PHY clock invalid\n");
+			return -EINVAL;
+		}
+
+		/* PHY_CLK_VALID bit is de-featured from all controller
+		 * versions below 2.4 and is to be checked only for
+		 * internal UTMI phy
+		 */
+		if (pdata->controller_ver > FSL_USB_VER_2_4 &&
+			pdata->have_sysif_regs && !usb_phy_clk_valid(hcd)) {
+			pr_err("fsl-ehci: USB PHY clock invalid\n");
+			return -EINVAL;
+		}
+
 		if (pdata->have_sysif_regs && pdata->controller_ver) {
 			/* controller version 1.6 or above */
 			clrsetbits_be32(non_ehci + FSL_SOC_USB_CTRL,
@@ -292,14 +462,9 @@ static int ehci_fsl_usb_setup(struct ehc
 			return -EINVAL;
 
 	if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
-		unsigned int chip, rev, svr;
-
-		svr = mfspr(SPRN_SVR);
-		chip = svr >> 16;
-		rev = (svr >> 4) & 0xf;
 
 		/* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
-		if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
+		if (pdata->has_fsl_erratum_14 == 1)
 			ehci->has_fsl_port_bug = 1;
 
 		if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
@@ -379,16 +544,57 @@ static int ehci_fsl_setup(struct usb_hcd
 	return retval;
 }
 
-struct ehci_fsl {
-	struct ehci_hcd	ehci;
 
 #ifdef CONFIG_PM
-	/* Saved USB PHY settings, need to restore after deep sleep. */
-	u32 usb_ctrl;
-#endif
-};
+void __iomem *phy_reg;
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PPC
+/* save usb registers */
+static int ehci_fsl_save_context(struct usb_hcd *hcd)
+{
+	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	void __iomem *non_ehci = hcd->regs;
+	struct device *dev = hcd->self.controller;
+	struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
+
+	if (pdata->phy_mode == FSL_USB2_PHY_UTMI_DUAL) {
+	phy_reg = ioremap(FSL_USB_PHY_ADDR,
+			sizeof(struct ccsr_usb_phy));
+	_memcpy_fromio((void *)&ehci_fsl->saved_phy_regs, phy_reg,
+	sizeof(struct ccsr_usb_phy));
+	}
+
+	_memcpy_fromio((void *)&ehci_fsl->saved_regs, ehci->regs,
+					sizeof(struct ehci_regs));
+	ehci_fsl->usb_ctrl = ioread32be(non_ehci + FSL_SOC_USB_CTRL);
+
+	return 0;
+}
+
+/*Restore usb registers */
+static int ehci_fsl_restore_context(struct usb_hcd *hcd)
+{
+	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
+	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+	void __iomem *non_ehci = hcd->regs;
+	struct device *dev = hcd->self.controller;
+	struct fsl_usb2_platform_data *pdata = dev_get_platdata(dev);
+
+	if (pdata->phy_mode == FSL_USB2_PHY_UTMI_DUAL) {
+		if (phy_reg)
+			_memcpy_toio(phy_reg,
+				(void *)&ehci_fsl->saved_phy_regs,
+				sizeof(struct ccsr_usb_phy));
+	}
+
+	_memcpy_toio(ehci->regs, (void *)&ehci_fsl->saved_regs,
+				sizeof(struct ehci_regs));
+	iowrite32be(ehci_fsl->usb_ctrl, non_ehci + FSL_SOC_USB_CTRL);
+
+	return 0;
+}
+#endif
 
 #ifdef CONFIG_PPC_MPC512x
 static int ehci_fsl_mpc512x_drv_suspend(struct device *dev)
@@ -535,26 +741,43 @@ static inline int ehci_fsl_mpc512x_drv_r
 }
 #endif /* CONFIG_PPC_MPC512x */
 
-static struct ehci_fsl *hcd_to_ehci_fsl(struct usb_hcd *hcd)
-{
-	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
-
-	return container_of(ehci, struct ehci_fsl, ehci);
-}
-
 static int ehci_fsl_drv_suspend(struct device *dev)
 {
 	struct usb_hcd *hcd = dev_get_drvdata(dev);
 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 	void __iomem *non_ehci = hcd->regs;
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+	struct usb_bus host = hcd->self;
+#endif
+
+#ifdef CONFIG_PPC
+suspend_state_t pm_state;
+pm_state = pm_suspend_state();
+
+if (pm_state == PM_SUSPEND_MEM)
+	ehci_fsl_save_context(hcd);
+#endif
 
 	if (of_device_is_compatible(dev->parent->of_node,
 				    "fsl,mpc5121-usb2-dr")) {
 		return ehci_fsl_mpc512x_drv_suspend(dev);
 	}
 
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+	if (host.is_otg) {
+		struct ehci_hcd *ehci = hcd_to_ehci(hcd);
+
+		/* remove hcd */
+		ehci_fsl->hcd_add = 0;
+		schedule_work(&ehci->change_hcd_work);
+		host.is_otg = 0;
+		return 0;
+	}
+#endif
+
 	ehci_prepare_ports_for_controller_suspend(hcd_to_ehci(hcd),
 			device_may_wakeup(dev));
+
 	if (!fsl_deep_sleep())
 		return 0;
 
@@ -568,12 +791,34 @@ static int ehci_fsl_drv_resume(struct de
 	struct ehci_fsl *ehci_fsl = hcd_to_ehci_fsl(hcd);
 	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
 	void __iomem *non_ehci = hcd->regs;
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+	struct usb_bus host = hcd->self;
+#endif
+
+#ifdef CONFIG_PPC
+suspend_state_t pm_state;
+pm_state = pm_suspend_state();
+
+if (pm_state == PM_SUSPEND_MEM)
+	ehci_fsl_restore_context(hcd);
+#endif
 
 	if (of_device_is_compatible(dev->parent->of_node,
 				    "fsl,mpc5121-usb2-dr")) {
 		return ehci_fsl_mpc512x_drv_resume(dev);
 	}
 
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+	if (host.is_otg) {
+		/* add hcd */
+		ehci_fsl->hcd_add = 1;
+		schedule_work(&ehci->change_hcd_work);
+		usb_hcd_resume_root_hub(hcd);
+		host.is_otg = 0;
+		return 0;
+	}
+#endif
+
 	ehci_prepare_ports_for_controller_resume(ehci);
 	if (!fsl_deep_sleep())
 		return 0;
--- a/drivers/usb/host/ehci-fsl.h
+++ b/drivers/usb/host/ehci-fsl.h
@@ -63,4 +63,7 @@
 #define UTMI_PHY_EN             (1<<9)
 #define ULPI_PHY_CLK_SEL        (1<<10)
 #define PHY_CLK_VALID		(1<<17)
+
+/* Retry count for checking UTMI PHY CLK validity */
+#define UTMI_PHY_CLK_VALID_CHK_RETRY 5
 #endif				/* _EHCI_FSL_H */
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -305,6 +305,8 @@ static int ehci_bus_suspend (struct usb_
 						USB_PORT_STAT_HIGH_SPEED)
 				fs_idle_delay = true;
 			ehci_writel(ehci, t2, reg);
+			if (ehci_has_fsl_susp_errata(ehci))
+				usleep_range(10000, 20000);
 			changed = 1;
 		}
 	}
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -180,6 +180,9 @@ struct ehci_hcd {			/* one per controlle
 	unsigned		periodic_count;	/* periodic activity count */
 	unsigned		uframe_periodic_max; /* max periodic time per uframe */
 
+#if defined(CONFIG_FSL_USB2_OTG) || defined(CONFIG_FSL_USB2_OTG_MODULE)
+	struct work_struct change_hcd_work;
+#endif
 
 	/* list of itds & sitds completed while now_frame was still active */
 	struct list_head	cached_itd_list;
@@ -706,8 +709,10 @@ ehci_port_speed(struct ehci_hcd *ehci, u
  * incoming packets get corrupted in HS mode
  */
 #define ehci_has_fsl_hs_errata(e)	((e)->has_fsl_hs_errata)
+#define ehci_has_fsl_susp_errata(e)     ((e)->has_fsl_susp_errata)
 #else
 #define ehci_has_fsl_hs_errata(e)	(0)
+#define ehci_has_fsl_susp_errata(e)     (0)
 #endif
 
 /*
--- a/drivers/usb/host/fsl-mph-dr-of.c
+++ b/drivers/usb/host/fsl-mph-dr-of.c
@@ -226,6 +226,18 @@ static int fsl_usb2_mph_dr_of_probe(stru
 		of_property_read_bool(np, "fsl,usb-erratum-a007792");
 	pdata->has_fsl_erratum_a005275 =
 		of_property_read_bool(np, "fsl,usb-erratum-a005275");
+	pdata->has_fsl_erratum_a005697 =
+		of_property_read_bool(np, "fsl,usb_erratum-a005697");
+	if (of_get_property(np, "fsl,erratum_a006918", NULL))
+		pdata->has_fsl_erratum_a006918 = 1;
+	else
+		pdata->has_fsl_erratum_a006918 = 0;
+
+	if (of_get_property(np, "fsl,usb_erratum_14", NULL))
+		pdata->has_fsl_erratum_14 = 1;
+	else
+		pdata->has_fsl_erratum_14 = 0;
+
 
 	/*
 	 * Determine whether phy_clk_valid needs to be checked
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007,2008 Freescale semiconductor, Inc.
+ * Copyright 2007,2008 Freescale Semiconductor, Inc.
  *
  * Author: Li Yang <LeoLi@freescale.com>
  *         Jerry Huang <Chang-Ming.Huang@freescale.com>
@@ -463,6 +463,7 @@ void otg_reset_controller(void)
 int fsl_otg_start_host(struct otg_fsm *fsm, int on)
 {
 	struct usb_otg *otg = fsm->otg;
+	struct usb_bus *host = otg->host;
 	struct device *dev;
 	struct fsl_otg *otg_dev =
 		container_of(otg->usb_phy, struct fsl_otg, phy);
@@ -486,6 +487,7 @@ int fsl_otg_start_host(struct otg_fsm *f
 			otg_reset_controller();
 			VDBG("host on......\n");
 			if (dev->driver->pm && dev->driver->pm->resume) {
+				host->is_otg = 1;
 				retval = dev->driver->pm->resume(dev);
 				if (fsm->id) {
 					/* default-b */
@@ -510,8 +512,11 @@ int fsl_otg_start_host(struct otg_fsm *f
 		else {
 			VDBG("host off......\n");
 			if (dev && dev->driver) {
-				if (dev->driver->pm && dev->driver->pm->suspend)
+				if (dev->driver->pm &&
+						dev->driver->pm->suspend) {
+					host->is_otg = 1;
 					retval = dev->driver->pm->suspend(dev);
+				}
 				if (fsm->id)
 					/* default-b */
 					fsl_otg_drv_vbus(fsm, 0);
@@ -539,8 +544,17 @@ int fsl_otg_start_gadget(struct otg_fsm
 	dev = otg->gadget->dev.parent;
 
 	if (on) {
-		if (dev->driver->resume)
+		/* Delay gadget resume to synchronize between host and gadget
+		 * drivers. Upon role-reversal host drv is shutdown by kernel
+		 * worker thread. By the time host drv shuts down, controller
+		 * gets programmed for gadget role. Shutting host drv after
+		 * this results in controller getting reset, and it stops
+		 * responding to otg events
+		 */
+		if (dev->driver->resume) {
+			msleep(1000);
 			dev->driver->resume(dev);
+		}
 	} else {
 		if (dev->driver->suspend)
 			dev->driver->suspend(dev, otg_suspend_state);
@@ -672,6 +686,10 @@ static void fsl_otg_event(struct work_st
 		fsl_otg_start_host(fsm, 0);
 		otg_drv_vbus(fsm, 0);
 		fsl_otg_start_gadget(fsm, 1);
+	} else {
+		fsl_otg_start_gadget(fsm, 0);
+		otg_drv_vbus(fsm, 1);
+		fsl_otg_start_host(fsm, 1);
 	}
 }
 
@@ -724,6 +742,7 @@ irqreturn_t fsl_otg_isr(int irq, void *d
 {
 	struct otg_fsm *fsm = &((struct fsl_otg *)dev_id)->fsm;
 	struct usb_otg *otg = ((struct fsl_otg *)dev_id)->phy.otg;
+	struct fsl_otg *otg_dev = dev_id;
 	u32 otg_int_src, otg_sc;
 
 	otg_sc = fsl_readl(&usb_dr_regs->otgsc);
@@ -753,18 +772,8 @@ irqreturn_t fsl_otg_isr(int irq, void *d
 				otg->gadget->is_a_peripheral = !fsm->id;
 			VDBG("ID int (ID is %d)\n", fsm->id);
 
-			if (fsm->id) {	/* switch to gadget */
-				schedule_delayed_work(
-					&((struct fsl_otg *)dev_id)->otg_event,
-					100);
-			} else {	/* switch to host */
-				cancel_delayed_work(&
-						    ((struct fsl_otg *)dev_id)->
-						    otg_event);
-				fsl_otg_start_gadget(fsm, 0);
-				otg_drv_vbus(fsm, 1);
-				fsl_otg_start_host(fsm, 1);
-			}
+			schedule_delayed_work(&otg_dev->otg_event, 100);
+
 			return IRQ_HANDLED;
 		}
 	}
@@ -923,12 +932,32 @@ int usb_otg_start(struct platform_device
 	temp &= ~(PORTSC_PHY_TYPE_SEL | PORTSC_PTW);
 	switch (pdata->phy_mode) {
 	case FSL_USB2_PHY_ULPI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			setbits32(&p_otg->dr_mem_map->control,
+				USB_CTRL_ULPI_PHY_CLK_SEL);
+			/*
+			 * Due to controller issue of PHY_CLK_VALID in ULPI
+			 * mode, we set USB_CTRL_USB_EN before checking
+			 * PHY_CLK_VALID, otherwise PHY_CLK_VALID doesn't work.
+			 */
+			clrsetbits_be32(&p_otg->dr_mem_map->control,
+				USB_CTRL_UTMI_PHY_EN, USB_CTRL_IOENB);
+		}
 		temp |= PORTSC_PTS_ULPI;
 		break;
 	case FSL_USB2_PHY_UTMI_WIDE:
 		temp |= PORTSC_PTW_16BIT;
 		/* fall through */
 	case FSL_USB2_PHY_UTMI:
+		if (pdata->controller_ver) {
+			/* controller version 1.6 or above */
+			setbits32(&p_otg->dr_mem_map->control,
+				USB_CTRL_UTMI_PHY_EN);
+			/* Delay for UTMI PHY CLK to become stable - 10ms */
+			mdelay(FSL_UTMI_PHY_DLY);
+		}
+		setbits32(&p_otg->dr_mem_map->control, USB_CTRL_UTMI_PHY_EN);
 		temp |= PORTSC_PTS_UTMI;
 		/* fall through */
 	default:
--- a/drivers/usb/phy/phy-fsl-usb.h
+++ b/drivers/usb/phy/phy-fsl-usb.h
@@ -199,6 +199,14 @@
 /* control Register Bit Masks */
 #define  USB_CTRL_IOENB			(0x1<<2)
 #define  USB_CTRL_ULPI_INT0EN		(0x1<<0)
+#define	USB_CTRL_WU_INT_EN		(0x1<<1)
+#define	USB_CTRL_LINE_STATE_FILTER__EN	(0x1<<3)
+#define	USB_CTRL_KEEP_OTG_ON		(0x1<<4)
+#define	USB_CTRL_OTG_PORT		(0x1<<5)
+#define	USB_CTRL_PLL_RESET		(0x1<<8)
+#define	USB_CTRL_UTMI_PHY_EN		(0x1<<9)
+#define	USB_CTRL_ULPI_PHY_CLK_SEL	(0x1<<10)
+#define	USB_CTRL_PHY_CLK_VALID		(0x1<<17)
 
 /* BCSR5 */
 #define BCSR5_INT_USB			(0x02)
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -362,6 +362,7 @@ struct usb_bus {
 					 * for control transfers?
 					 */
 	u8 otg_port;			/* 0, or number of OTG/HNP port */
+	unsigned is_otg:1;		/* true when host is also otg */
 	unsigned is_b_host:1;		/* true during some HNP roleswitches */
 	unsigned b_hnp_enable:1;	/* OTG: did A-Host enable HNP? */
 	unsigned no_stop_on_short:1;    /*
--- a/include/linux/usb/of.h
+++ b/include/linux/usb/of.h
@@ -11,6 +11,8 @@
 #include <linux/usb/otg.h>
 #include <linux/usb/phy.h>
 
+enum usb_dr_mode of_usb_get_dr_mode(struct device_node *np);
+
 #if IS_ENABLED(CONFIG_OF)
 enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0);
 bool of_usb_host_tpl_support(struct device_node *np);