drivers/usb/dwc3/dwc3-omap.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /**
  * dwc3-omap.c - OMAP Specific Glue layer
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
  *
  * Authors: Felipe Balbi <balbi@ti.com>,
  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
  */

 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/dwc3-omap.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/ioport.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/extcon.h>
 #include <linux/regulator/consumer.h>

 #include <linux/usb/otg.h>

 /*
  * All these registers belong to OMAP's Wrapper around the
  * DesignWare USB3 Core.
  */

 #define USBOTGSS_REVISION			0x0000
 #define USBOTGSS_SYSCONFIG			0x0010
 #define USBOTGSS_IRQ_EOI			0x0020
 #define USBOTGSS_EOI_OFFSET			0x0008
 #define USBOTGSS_IRQSTATUS_RAW_0		0x0024
 #define USBOTGSS_IRQSTATUS_0			0x0028
 #define USBOTGSS_IRQENABLE_SET_0		0x002c
 #define USBOTGSS_IRQENABLE_CLR_0		0x0030
 #define USBOTGSS_IRQ0_OFFSET			0x0004
 #define USBOTGSS_IRQSTATUS_RAW_1		0x0030
 #define USBOTGSS_IRQSTATUS_1			0x0034
 #define USBOTGSS_IRQENABLE_SET_1		0x0038
 #define USBOTGSS_IRQENABLE_CLR_1		0x003c
 #define USBOTGSS_IRQSTATUS_RAW_2		0x0040
 #define USBOTGSS_IRQSTATUS_2			0x0044
 #define USBOTGSS_IRQENABLE_SET_2		0x0048
 #define USBOTGSS_IRQENABLE_CLR_2		0x004c
 #define USBOTGSS_IRQSTATUS_RAW_3		0x0050
 #define USBOTGSS_IRQSTATUS_3			0x0054
 #define USBOTGSS_IRQENABLE_SET_3		0x0058
 #define USBOTGSS_IRQENABLE_CLR_3		0x005c
 #define USBOTGSS_IRQSTATUS_EOI_MISC		0x0030
 #define USBOTGSS_IRQSTATUS_RAW_MISC		0x0034
 #define USBOTGSS_IRQSTATUS_MISC			0x0038
 #define USBOTGSS_IRQENABLE_SET_MISC		0x003c
 #define USBOTGSS_IRQENABLE_CLR_MISC		0x0040
 #define USBOTGSS_IRQMISC_OFFSET			0x03fc
 #define USBOTGSS_UTMI_OTG_STATUS		0x0080
 #define USBOTGSS_UTMI_OTG_CTRL			0x0084
 #define USBOTGSS_UTMI_OTG_OFFSET		0x0480
 #define USBOTGSS_TXFIFO_DEPTH			0x0508
 #define USBOTGSS_RXFIFO_DEPTH			0x050c
 #define USBOTGSS_MMRAM_OFFSET			0x0100
 #define USBOTGSS_FLADJ				0x0104
 #define USBOTGSS_DEBUG_CFG			0x0108
 #define USBOTGSS_DEBUG_DATA			0x010c
 #define USBOTGSS_DEV_EBC_EN			0x0110
 #define USBOTGSS_DEBUG_OFFSET			0x0600

 /* SYSCONFIG REGISTER */
 #define USBOTGSS_SYSCONFIG_DMADISABLE		BIT(16)

 /* IRQ_EOI REGISTER */
 #define USBOTGSS_IRQ_EOI_LINE_NUMBER		BIT(0)

 /* IRQS0 BITS */
 #define USBOTGSS_IRQO_COREIRQ_ST		BIT(0)

 /* IRQMISC BITS */
 #define USBOTGSS_IRQMISC_DMADISABLECLR		BIT(17)
 #define USBOTGSS_IRQMISC_OEVT			BIT(16)
 #define USBOTGSS_IRQMISC_DRVVBUS_RISE		BIT(13)
 #define USBOTGSS_IRQMISC_CHRGVBUS_RISE		BIT(12)
 #define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE	BIT(11)
 #define USBOTGSS_IRQMISC_IDPULLUP_RISE		BIT(8)
 #define USBOTGSS_IRQMISC_DRVVBUS_FALL		BIT(5)
 #define USBOTGSS_IRQMISC_CHRGVBUS_FALL		BIT(4)
 #define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL		BIT(3)
 #define USBOTGSS_IRQMISC_IDPULLUP_FALL		BIT(0)

 /* UTMI_OTG_STATUS REGISTER */
 #define USBOTGSS_UTMI_OTG_STATUS_DRVVBUS	BIT(5)
 #define USBOTGSS_UTMI_OTG_STATUS_CHRGVBUS	BIT(4)
 #define USBOTGSS_UTMI_OTG_STATUS_DISCHRGVBUS	BIT(3)
 #define USBOTGSS_UTMI_OTG_STATUS_IDPULLUP	BIT(0)

 /* UTMI_OTG_CTRL REGISTER */
 #define USBOTGSS_UTMI_OTG_CTRL_SW_MODE		BIT(31)
 #define USBOTGSS_UTMI_OTG_CTRL_POWERPRESENT	BIT(9)
 #define USBOTGSS_UTMI_OTG_CTRL_TXBITSTUFFENABLE BIT(8)
 #define USBOTGSS_UTMI_OTG_CTRL_IDDIG		BIT(4)
 #define USBOTGSS_UTMI_OTG_CTRL_SESSEND		BIT(3)
 #define USBOTGSS_UTMI_OTG_CTRL_SESSVALID	BIT(2)
 #define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID	BIT(1)

 struct dwc3_omap {
 	struct device		*dev;

 	int			irq;
 	void __iomem		*base;

 	u32			utmi_otg_ctrl;
 	u32			utmi_otg_offset;
 	u32			irqmisc_offset;
 	u32			irq_eoi_offset;
 	u32			debug_offset;
 	u32			irq0_offset;

 	struct extcon_dev	*edev;
 	struct notifier_block	vbus_nb;
 	struct notifier_block	id_nb;

 	struct regulator	*vbus_reg;
 };

 enum omap_dwc3_vbus_id_status {
 	OMAP_DWC3_ID_FLOAT,
 	OMAP_DWC3_ID_GROUND,
 	OMAP_DWC3_VBUS_OFF,
 	OMAP_DWC3_VBUS_VALID,
 };

 static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
 {
 	return readl(base + offset);
 }

 static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
 {
 	writel(value, base + offset);
 }

 static u32 dwc3_omap_read_utmi_ctrl(struct dwc3_omap *omap)
 {
 	return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL +
 							omap->utmi_otg_offset);
 }

 static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL +
 					omap->utmi_otg_offset, value);

 }

 static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
 {
 	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
 						omap->irq0_offset);
 }

 static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 -
 						omap->irq0_offset, value);

 }

 static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
 {
 	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
 						omap->irqmisc_offset);
 }

 static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC +
 					omap->irqmisc_offset, value);

 }

 static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC +
 						omap->irqmisc_offset, value);

 }

 static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 -
 						omap->irq0_offset, value);
 }

 static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
 						omap->irqmisc_offset, value);
 }

 static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
 {
 	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
 						omap->irq0_offset, value);
 }

 static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
 	enum omap_dwc3_vbus_id_status status)
 {
 	int	ret;
 	u32	val;

 	switch (status) {
 	case OMAP_DWC3_ID_GROUND:
 		if (omap->vbus_reg) {
 			ret = regulator_enable(omap->vbus_reg);
 			if (ret) {
 				dev_err(omap->dev, "regulator enable failed\n");
 				return;
 			}
 		}

 		val = dwc3_omap_read_utmi_ctrl(omap);
 		val &= ~USBOTGSS_UTMI_OTG_CTRL_IDDIG;
 		dwc3_omap_write_utmi_ctrl(omap, val);
 		break;

 	case OMAP_DWC3_VBUS_VALID:
 		val = dwc3_omap_read_utmi_ctrl(omap);
 		val &= ~USBOTGSS_UTMI_OTG_CTRL_SESSEND;
 		val |= USBOTGSS_UTMI_OTG_CTRL_VBUSVALID
 				| USBOTGSS_UTMI_OTG_CTRL_SESSVALID;
 		dwc3_omap_write_utmi_ctrl(omap, val);
 		break;

 	case OMAP_DWC3_ID_FLOAT:
 		if (omap->vbus_reg)
 			regulator_disable(omap->vbus_reg);
 		val = dwc3_omap_read_utmi_ctrl(omap);
 		val |= USBOTGSS_UTMI_OTG_CTRL_IDDIG;
 		dwc3_omap_write_utmi_ctrl(omap, val);
 		break;

 	case OMAP_DWC3_VBUS_OFF:
 		val = dwc3_omap_read_utmi_ctrl(omap);
 		val &= ~(USBOTGSS_UTMI_OTG_CTRL_SESSVALID
 				| USBOTGSS_UTMI_OTG_CTRL_VBUSVALID);
 		val |= USBOTGSS_UTMI_OTG_CTRL_SESSEND;
 		dwc3_omap_write_utmi_ctrl(omap, val);
 		break;

 	default:
 		dev_WARN(omap->dev, "invalid state\n");
 	}
 }

 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);

 static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
 {
 	struct dwc3_omap	*omap = _omap;

 	if (dwc3_omap_read_irqmisc_status(omap) ||
 	    dwc3_omap_read_irq0_status(omap)) {
 		/* mask irqs */
 		dwc3_omap_disable_irqs(omap);
 		return IRQ_WAKE_THREAD;
 	}

 	return IRQ_NONE;
 }

 static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
 {
 	struct dwc3_omap	*omap = _omap;
 	u32			reg;

 	/* clear irq status flags */
 	reg = dwc3_omap_read_irqmisc_status(omap);
 	dwc3_omap_write_irqmisc_status(omap, reg);

 	reg = dwc3_omap_read_irq0_status(omap);
 	dwc3_omap_write_irq0_status(omap, reg);

 	/* unmask irqs */
 	dwc3_omap_enable_irqs(omap);

 	return IRQ_HANDLED;
 }

 static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
 {
 	u32			reg;

 	/* enable all IRQs */
 	reg = USBOTGSS_IRQO_COREIRQ_ST;
 	dwc3_omap_write_irq0_set(omap, reg);

 	reg = (USBOTGSS_IRQMISC_OEVT |
 			USBOTGSS_IRQMISC_DRVVBUS_RISE |
 			USBOTGSS_IRQMISC_CHRGVBUS_RISE |
 			USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
 			USBOTGSS_IRQMISC_IDPULLUP_RISE |
 			USBOTGSS_IRQMISC_DRVVBUS_FALL |
 			USBOTGSS_IRQMISC_CHRGVBUS_FALL |
 			USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
 			USBOTGSS_IRQMISC_IDPULLUP_FALL);

 	dwc3_omap_write_irqmisc_set(omap, reg);
 }

 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
 {
 	u32			reg;

 	/* disable all IRQs */
 	reg = USBOTGSS_IRQO_COREIRQ_ST;
 	dwc3_omap_write_irq0_clr(omap, reg);

 	reg = (USBOTGSS_IRQMISC_OEVT |
 			USBOTGSS_IRQMISC_DRVVBUS_RISE |
 			USBOTGSS_IRQMISC_CHRGVBUS_RISE |
 			USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
 			USBOTGSS_IRQMISC_IDPULLUP_RISE |
 			USBOTGSS_IRQMISC_DRVVBUS_FALL |
 			USBOTGSS_IRQMISC_CHRGVBUS_FALL |
 			USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
 			USBOTGSS_IRQMISC_IDPULLUP_FALL);

 	dwc3_omap_write_irqmisc_clr(omap, reg);
 }

 static int dwc3_omap_id_notifier(struct notifier_block *nb,
 	unsigned long event, void *ptr)
 {
 	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb);

 	if (event)
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 	else
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);

 	return NOTIFY_DONE;
 }

 static int dwc3_omap_vbus_notifier(struct notifier_block *nb,
 	unsigned long event, void *ptr)
 {
 	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb);

 	if (event)
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 	else
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);

 	return NOTIFY_DONE;
 }

 static void dwc3_omap_map_offset(struct dwc3_omap *omap)
 {
 	struct device_node	*node = omap->dev->of_node;

 	/*
 	 * Differentiate between OMAP5 and AM437x.
 	 *
 	 * For OMAP5(ES2.0) and AM437x wrapper revision is same, even
 	 * though there are changes in wrapper register offsets.
 	 *
 	 * Using dt compatible to differentiate AM437x.
 	 */
 	if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
 		omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
 		omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
 		omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
 		omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
 		omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
 	}
 }

 static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
 {
 	u32			reg;
 	struct device_node	*node = omap->dev->of_node;
 	u32			utmi_mode = 0;

 	reg = dwc3_omap_read_utmi_ctrl(omap);

 	of_property_read_u32(node, "utmi-mode", &utmi_mode);

 	switch (utmi_mode) {
 	case DWC3_OMAP_UTMI_MODE_SW:
 		reg |= USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
 		break;
 	case DWC3_OMAP_UTMI_MODE_HW:
 		reg &= ~USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
 		break;
 	default:
 		dev_WARN(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
 	}

 	dwc3_omap_write_utmi_ctrl(omap, reg);
 }

 static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
 {
 	int			ret;
 	struct device_node	*node = omap->dev->of_node;
 	struct extcon_dev	*edev;

 	if (of_property_read_bool(node, "extcon")) {
 		edev = extcon_get_edev_by_phandle(omap->dev, 0);
 		if (IS_ERR(edev)) {
 			dev_vdbg(omap->dev, "couldn't get extcon device\n");
 			return -EPROBE_DEFER;
 		}

 		omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
 		ret = devm_extcon_register_notifier(omap->dev, edev,
 						EXTCON_USB, &omap->vbus_nb);
 		if (ret < 0)
 			dev_vdbg(omap->dev, "failed to register notifier for USB\n");

 		omap->id_nb.notifier_call = dwc3_omap_id_notifier;
 		ret = devm_extcon_register_notifier(omap->dev, edev,
 						EXTCON_USB_HOST, &omap->id_nb);
 		if (ret < 0)
 			dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");

 		if (extcon_get_state(edev, EXTCON_USB) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 		if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
 			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);

 		omap->edev = edev;
 	}

 	return 0;
 }

 static int dwc3_omap_probe(struct platform_device *pdev)
 {
 	struct device_node	*node = pdev->dev.of_node;

 	struct dwc3_omap	*omap;
 	struct resource		*res;
 	struct device		*dev = &pdev->dev;
 	struct regulator	*vbus_reg = NULL;

 	int			ret;
 	int			irq;

 	u32			reg;

 	void __iomem		*base;

 	if (!node) {
 		dev_err(dev, "device node not found\n");
 		return -EINVAL;
 	}

 	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
 	if (!omap)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, omap);

 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(dev, "missing IRQ resource: %d\n", irq);
 		return irq;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

 	if (of_property_read_bool(node, "vbus-supply")) {
 		vbus_reg = devm_regulator_get(dev, "vbus");
 		if (IS_ERR(vbus_reg)) {
 			dev_err(dev, "vbus init failed\n");
 			return PTR_ERR(vbus_reg);
 		}
 	}

 	omap->dev	= dev;
 	omap->irq	= irq;
 	omap->base	= base;
 	omap->vbus_reg	= vbus_reg;

 	pm_runtime_enable(dev);
 	ret = pm_runtime_get_sync(dev);
 	if (ret < 0) {
 		dev_err(dev, "get_sync failed with err %d\n", ret);
 		goto err1;
 	}

 	dwc3_omap_map_offset(omap);
 	dwc3_omap_set_utmi_mode(omap);

 	/* check the DMA Status */
 	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);

 	ret = dwc3_omap_extcon_register(omap);
 	if (ret < 0)
 		goto err1;

 	ret = of_platform_populate(node, NULL, NULL, dev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to create dwc3 core\n");
 		goto err1;
 	}

 	ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
 					dwc3_omap_interrupt_thread, IRQF_SHARED,
 					"dwc3-omap", omap);
 	if (ret) {
 		dev_err(dev, "failed to request IRQ #%d --> %d\n",
 			omap->irq, ret);
 		goto err1;
 	}
 	dwc3_omap_enable_irqs(omap);
 	return 0;

 err1:
 	pm_runtime_put_sync(dev);
 	pm_runtime_disable(dev);

 	return ret;
 }

 static int dwc3_omap_remove(struct platform_device *pdev)
 {
 	struct dwc3_omap	*omap = platform_get_drvdata(pdev);

 	dwc3_omap_disable_irqs(omap);
 	disable_irq(omap->irq);
 	of_platform_depopulate(omap->dev);
 	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);

 	return 0;
 }

 static const struct of_device_id of_dwc3_match[] = {
 	{
 		.compatible =	"ti,dwc3"
 	},
 	{
 		.compatible =	"ti,am437x-dwc3"
 	},
 	{ },
 };
 MODULE_DEVICE_TABLE(of, of_dwc3_match);

 #ifdef CONFIG_PM_SLEEP
 static int dwc3_omap_suspend(struct device *dev)
 {
 	struct dwc3_omap	*omap = dev_get_drvdata(dev);

 	omap->utmi_otg_ctrl = dwc3_omap_read_utmi_ctrl(omap);
 	dwc3_omap_disable_irqs(omap);

 	return 0;
 }

 static int dwc3_omap_resume(struct device *dev)
 {
 	struct dwc3_omap	*omap = dev_get_drvdata(dev);

 	dwc3_omap_write_utmi_ctrl(omap, omap->utmi_otg_ctrl);
 	dwc3_omap_enable_irqs(omap);

 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);

 	return 0;
 }

 static void dwc3_omap_complete(struct device *dev)
 {
 	struct dwc3_omap	*omap = dev_get_drvdata(dev);

 	if (extcon_get_state(omap->edev, EXTCON_USB))
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
 	else
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);

 	if (extcon_get_state(omap->edev, EXTCON_USB_HOST))
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
 	else
 		dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
 }

 static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {

 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
 	.complete = dwc3_omap_complete,
 };

 #define DEV_PM_OPS	(&dwc3_omap_dev_pm_ops)
 #else
 #define DEV_PM_OPS	NULL
 #endif /* CONFIG_PM_SLEEP */

 static struct platform_driver dwc3_omap_driver = {
 	.probe		= dwc3_omap_probe,
 	.remove		= dwc3_omap_remove,
 	.driver		= {
 		.name	= "omap-dwc3",
 		.of_match_table	= of_dwc3_match,
 		.pm	= DEV_PM_OPS,
 	},
 };

 module_platform_driver(dwc3_omap_driver);

 MODULE_ALIAS("platform:omap-dwc3");
 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
	// SPDX-License-Identifier: GPL-2.0
	/**
	* dwc3-omap.c - OMAP Specific Glue layer
	*
	* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
	*
	* Authors: Felipe Balbi <balbi@ti.com>,
	* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
	*/

	#include <linux/module.h>
	#include <linux/kernel.h>
	#include <linux/slab.h>
	#include <linux/irq.h>
	#include <linux/interrupt.h>
	#include <linux/platform_device.h>
	#include <linux/platform_data/dwc3-omap.h>
	#include <linux/pm_runtime.h>
	#include <linux/dma-mapping.h>
	#include <linux/ioport.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/of_platform.h>
	#include <linux/extcon.h>
	#include <linux/regulator/consumer.h>

	#include <linux/usb/otg.h>

	/*
	* All these registers belong to OMAP's Wrapper around the
	* DesignWare USB3 Core.
	*/

	#define USBOTGSS_REVISION 0x0000
	#define USBOTGSS_SYSCONFIG 0x0010
	#define USBOTGSS_IRQ_EOI 0x0020
	#define USBOTGSS_EOI_OFFSET 0x0008
	#define USBOTGSS_IRQSTATUS_RAW_0 0x0024
	#define USBOTGSS_IRQSTATUS_0 0x0028
	#define USBOTGSS_IRQENABLE_SET_0 0x002c
	#define USBOTGSS_IRQENABLE_CLR_0 0x0030
	#define USBOTGSS_IRQ0_OFFSET 0x0004
	#define USBOTGSS_IRQSTATUS_RAW_1 0x0030
	#define USBOTGSS_IRQSTATUS_1 0x0034
	#define USBOTGSS_IRQENABLE_SET_1 0x0038
	#define USBOTGSS_IRQENABLE_CLR_1 0x003c
	#define USBOTGSS_IRQSTATUS_RAW_2 0x0040
	#define USBOTGSS_IRQSTATUS_2 0x0044
	#define USBOTGSS_IRQENABLE_SET_2 0x0048
	#define USBOTGSS_IRQENABLE_CLR_2 0x004c
	#define USBOTGSS_IRQSTATUS_RAW_3 0x0050
	#define USBOTGSS_IRQSTATUS_3 0x0054
	#define USBOTGSS_IRQENABLE_SET_3 0x0058
	#define USBOTGSS_IRQENABLE_CLR_3 0x005c
	#define USBOTGSS_IRQSTATUS_EOI_MISC 0x0030
	#define USBOTGSS_IRQSTATUS_RAW_MISC 0x0034
	#define USBOTGSS_IRQSTATUS_MISC 0x0038
	#define USBOTGSS_IRQENABLE_SET_MISC 0x003c
	#define USBOTGSS_IRQENABLE_CLR_MISC 0x0040
	#define USBOTGSS_IRQMISC_OFFSET 0x03fc
	#define USBOTGSS_UTMI_OTG_STATUS 0x0080
	#define USBOTGSS_UTMI_OTG_CTRL 0x0084
	#define USBOTGSS_UTMI_OTG_OFFSET 0x0480
	#define USBOTGSS_TXFIFO_DEPTH 0x0508
	#define USBOTGSS_RXFIFO_DEPTH 0x050c
	#define USBOTGSS_MMRAM_OFFSET 0x0100
	#define USBOTGSS_FLADJ 0x0104
	#define USBOTGSS_DEBUG_CFG 0x0108
	#define USBOTGSS_DEBUG_DATA 0x010c
	#define USBOTGSS_DEV_EBC_EN 0x0110
	#define USBOTGSS_DEBUG_OFFSET 0x0600

	/* SYSCONFIG REGISTER */
	#define USBOTGSS_SYSCONFIG_DMADISABLE BIT(16)

	/* IRQ_EOI REGISTER */
	#define USBOTGSS_IRQ_EOI_LINE_NUMBER BIT(0)

	/* IRQS0 BITS */
	#define USBOTGSS_IRQO_COREIRQ_ST BIT(0)

	/* IRQMISC BITS */
	#define USBOTGSS_IRQMISC_DMADISABLECLR BIT(17)
	#define USBOTGSS_IRQMISC_OEVT BIT(16)
	#define USBOTGSS_IRQMISC_DRVVBUS_RISE BIT(13)
	#define USBOTGSS_IRQMISC_CHRGVBUS_RISE BIT(12)
	#define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE BIT(11)
	#define USBOTGSS_IRQMISC_IDPULLUP_RISE BIT(8)
	#define USBOTGSS_IRQMISC_DRVVBUS_FALL BIT(5)
	#define USBOTGSS_IRQMISC_CHRGVBUS_FALL BIT(4)
	#define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL BIT(3)
	#define USBOTGSS_IRQMISC_IDPULLUP_FALL BIT(0)

	/* UTMI_OTG_STATUS REGISTER */
	#define USBOTGSS_UTMI_OTG_STATUS_DRVVBUS BIT(5)
	#define USBOTGSS_UTMI_OTG_STATUS_CHRGVBUS BIT(4)
	#define USBOTGSS_UTMI_OTG_STATUS_DISCHRGVBUS BIT(3)
	#define USBOTGSS_UTMI_OTG_STATUS_IDPULLUP BIT(0)

	/* UTMI_OTG_CTRL REGISTER */
	#define USBOTGSS_UTMI_OTG_CTRL_SW_MODE BIT(31)
	#define USBOTGSS_UTMI_OTG_CTRL_POWERPRESENT BIT(9)
	#define USBOTGSS_UTMI_OTG_CTRL_TXBITSTUFFENABLE BIT(8)
	#define USBOTGSS_UTMI_OTG_CTRL_IDDIG BIT(4)
	#define USBOTGSS_UTMI_OTG_CTRL_SESSEND BIT(3)
	#define USBOTGSS_UTMI_OTG_CTRL_SESSVALID BIT(2)
	#define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID BIT(1)

	struct dwc3_omap {
	struct device *dev;

	int irq;
	void __iomem *base;

	u32 utmi_otg_ctrl;
	u32 utmi_otg_offset;
	u32 irqmisc_offset;
	u32 irq_eoi_offset;
	u32 debug_offset;
	u32 irq0_offset;

	struct extcon_dev *edev;
	struct notifier_block vbus_nb;
	struct notifier_block id_nb;

	struct regulator *vbus_reg;
	};

	enum omap_dwc3_vbus_id_status {
	OMAP_DWC3_ID_FLOAT,
	OMAP_DWC3_ID_GROUND,
	OMAP_DWC3_VBUS_OFF,
	OMAP_DWC3_VBUS_VALID,
	};

	static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
	{
	return readl(base + offset);
	}

	static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
	{
	writel(value, base + offset);
	}

	static u32 dwc3_omap_read_utmi_ctrl(struct dwc3_omap *omap)
	{
	return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL +
	omap->utmi_otg_offset);
	}

	static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL +
	omap->utmi_otg_offset, value);

	}

	static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
	{
	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
	omap->irq0_offset);
	}

	static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 -
	omap->irq0_offset, value);

	}

	static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
	{
	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
	omap->irqmisc_offset);
	}

	static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC +
	omap->irqmisc_offset, value);

	}

	static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC +
	omap->irqmisc_offset, value);

	}

	static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 -
	omap->irq0_offset, value);
	}

	static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
	omap->irqmisc_offset, value);
	}

	static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
	{
	dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
	omap->irq0_offset, value);
	}

	static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
	enum omap_dwc3_vbus_id_status status)
	{
	int ret;
	u32 val;

	switch (status) {
	case OMAP_DWC3_ID_GROUND:
	if (omap->vbus_reg) {
	ret = regulator_enable(omap->vbus_reg);
	if (ret) {
	dev_err(omap->dev, "regulator enable failed\n");
	return;
	}
	}

	val = dwc3_omap_read_utmi_ctrl(omap);
	val &= ~USBOTGSS_UTMI_OTG_CTRL_IDDIG;
	dwc3_omap_write_utmi_ctrl(omap, val);
	break;

	case OMAP_DWC3_VBUS_VALID:
	val = dwc3_omap_read_utmi_ctrl(omap);
	val &= ~USBOTGSS_UTMI_OTG_CTRL_SESSEND;
	val \|= USBOTGSS_UTMI_OTG_CTRL_VBUSVALID
	\| USBOTGSS_UTMI_OTG_CTRL_SESSVALID;
	dwc3_omap_write_utmi_ctrl(omap, val);
	break;

	case OMAP_DWC3_ID_FLOAT:
	if (omap->vbus_reg)
	regulator_disable(omap->vbus_reg);
	val = dwc3_omap_read_utmi_ctrl(omap);
	val \|= USBOTGSS_UTMI_OTG_CTRL_IDDIG;
	dwc3_omap_write_utmi_ctrl(omap, val);
	break;

	case OMAP_DWC3_VBUS_OFF:
	val = dwc3_omap_read_utmi_ctrl(omap);
	val &= ~(USBOTGSS_UTMI_OTG_CTRL_SESSVALID
	\| USBOTGSS_UTMI_OTG_CTRL_VBUSVALID);
	val \|= USBOTGSS_UTMI_OTG_CTRL_SESSEND;
	dwc3_omap_write_utmi_ctrl(omap, val);
	break;

	default:
	dev_WARN(omap->dev, "invalid state\n");
	}
	}

	static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
	static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);

	static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
	{
	struct dwc3_omap *omap = _omap;

	if (dwc3_omap_read_irqmisc_status(omap) \|\|
	dwc3_omap_read_irq0_status(omap)) {
	/* mask irqs */
	dwc3_omap_disable_irqs(omap);
	return IRQ_WAKE_THREAD;
	}

	return IRQ_NONE;
	}

	static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
	{
	struct dwc3_omap *omap = _omap;
	u32 reg;

	/* clear irq status flags */
	reg = dwc3_omap_read_irqmisc_status(omap);
	dwc3_omap_write_irqmisc_status(omap, reg);

	reg = dwc3_omap_read_irq0_status(omap);
	dwc3_omap_write_irq0_status(omap, reg);

	/* unmask irqs */
	dwc3_omap_enable_irqs(omap);

	return IRQ_HANDLED;
	}

	static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
	{
	u32 reg;

	/* enable all IRQs */
	reg = USBOTGSS_IRQO_COREIRQ_ST;
	dwc3_omap_write_irq0_set(omap, reg);

	reg = (USBOTGSS_IRQMISC_OEVT \|
	USBOTGSS_IRQMISC_DRVVBUS_RISE \|
	USBOTGSS_IRQMISC_CHRGVBUS_RISE \|
	USBOTGSS_IRQMISC_DISCHRGVBUS_RISE \|
	USBOTGSS_IRQMISC_IDPULLUP_RISE \|
	USBOTGSS_IRQMISC_DRVVBUS_FALL \|
	USBOTGSS_IRQMISC_CHRGVBUS_FALL \|
	USBOTGSS_IRQMISC_DISCHRGVBUS_FALL \|
	USBOTGSS_IRQMISC_IDPULLUP_FALL);

	dwc3_omap_write_irqmisc_set(omap, reg);
	}

	static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
	{
	u32 reg;

	/* disable all IRQs */
	reg = USBOTGSS_IRQO_COREIRQ_ST;
	dwc3_omap_write_irq0_clr(omap, reg);

	reg = (USBOTGSS_IRQMISC_OEVT \|
	USBOTGSS_IRQMISC_DRVVBUS_RISE \|
	USBOTGSS_IRQMISC_CHRGVBUS_RISE \|
	USBOTGSS_IRQMISC_DISCHRGVBUS_RISE \|
	USBOTGSS_IRQMISC_IDPULLUP_RISE \|
	USBOTGSS_IRQMISC_DRVVBUS_FALL \|
	USBOTGSS_IRQMISC_CHRGVBUS_FALL \|
	USBOTGSS_IRQMISC_DISCHRGVBUS_FALL \|
	USBOTGSS_IRQMISC_IDPULLUP_FALL);

	dwc3_omap_write_irqmisc_clr(omap, reg);
	}

	static int dwc3_omap_id_notifier(struct notifier_block *nb,
	unsigned long event, void *ptr)
	{
	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb);

	if (event)
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
	else
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);

	return NOTIFY_DONE;
	}

	static int dwc3_omap_vbus_notifier(struct notifier_block *nb,
	unsigned long event, void *ptr)
	{
	struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb);

	if (event)
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
	else
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);

	return NOTIFY_DONE;
	}

	static void dwc3_omap_map_offset(struct dwc3_omap *omap)
	{
	struct device_node *node = omap->dev->of_node;

	/*
	* Differentiate between OMAP5 and AM437x.
	*
	* For OMAP5(ES2.0) and AM437x wrapper revision is same, even
	* though there are changes in wrapper register offsets.
	*
	* Using dt compatible to differentiate AM437x.
	*/
	if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
	omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
	omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
	omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
	omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
	omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
	}
	}

	static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
	{
	u32 reg;
	struct device_node *node = omap->dev->of_node;
	u32 utmi_mode = 0;

	reg = dwc3_omap_read_utmi_ctrl(omap);

	of_property_read_u32(node, "utmi-mode", &utmi_mode);

	switch (utmi_mode) {
	case DWC3_OMAP_UTMI_MODE_SW:
	reg \|= USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
	break;
	case DWC3_OMAP_UTMI_MODE_HW:
	reg &= ~USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
	break;
	default:
	dev_WARN(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
	}

	dwc3_omap_write_utmi_ctrl(omap, reg);
	}

	static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
	{
	int ret;
	struct device_node *node = omap->dev->of_node;
	struct extcon_dev *edev;

	if (of_property_read_bool(node, "extcon")) {
	edev = extcon_get_edev_by_phandle(omap->dev, 0);
	if (IS_ERR(edev)) {
	dev_vdbg(omap->dev, "couldn't get extcon device\n");
	return -EPROBE_DEFER;
	}

	omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
	ret = devm_extcon_register_notifier(omap->dev, edev,
	EXTCON_USB, &omap->vbus_nb);
	if (ret < 0)
	dev_vdbg(omap->dev, "failed to register notifier for USB\n");

	omap->id_nb.notifier_call = dwc3_omap_id_notifier;
	ret = devm_extcon_register_notifier(omap->dev, edev,
	EXTCON_USB_HOST, &omap->id_nb);
	if (ret < 0)
	dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");

	if (extcon_get_state(edev, EXTCON_USB) == true)
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
	if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);

	omap->edev = edev;
	}

	return 0;
	}

	static int dwc3_omap_probe(struct platform_device *pdev)
	{
	struct device_node *node = pdev->dev.of_node;

	struct dwc3_omap *omap;
	struct resource *res;
	struct device *dev = &pdev->dev;
	struct regulator *vbus_reg = NULL;

	int ret;
	int irq;

	u32 reg;

	void __iomem *base;

	if (!node) {
	dev_err(dev, "device node not found\n");
	return -EINVAL;
	}

	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
	if (!omap)
	return -ENOMEM;

	platform_set_drvdata(pdev, omap);

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
	dev_err(dev, "missing IRQ resource: %d\n", irq);
	return irq;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	base = devm_ioremap_resource(dev, res);
	if (IS_ERR(base))
	return PTR_ERR(base);

	if (of_property_read_bool(node, "vbus-supply")) {
	vbus_reg = devm_regulator_get(dev, "vbus");
	if (IS_ERR(vbus_reg)) {
	dev_err(dev, "vbus init failed\n");
	return PTR_ERR(vbus_reg);
	}
	}

	omap->dev = dev;
	omap->irq = irq;
	omap->base = base;
	omap->vbus_reg = vbus_reg;

	pm_runtime_enable(dev);
	ret = pm_runtime_get_sync(dev);
	if (ret < 0) {
	dev_err(dev, "get_sync failed with err %d\n", ret);
	goto err1;
	}

	dwc3_omap_map_offset(omap);
	dwc3_omap_set_utmi_mode(omap);

	/* check the DMA Status */
	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);

	ret = dwc3_omap_extcon_register(omap);
	if (ret < 0)
	goto err1;

	ret = of_platform_populate(node, NULL, NULL, dev);
	if (ret) {
	dev_err(&pdev->dev, "failed to create dwc3 core\n");
	goto err1;
	}

	ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
	dwc3_omap_interrupt_thread, IRQF_SHARED,
	"dwc3-omap", omap);
	if (ret) {
	dev_err(dev, "failed to request IRQ #%d --> %d\n",
	omap->irq, ret);
	goto err1;
	}
	dwc3_omap_enable_irqs(omap);
	return 0;

	err1:
	pm_runtime_put_sync(dev);
	pm_runtime_disable(dev);

	return ret;
	}

	static int dwc3_omap_remove(struct platform_device *pdev)
	{
	struct dwc3_omap *omap = platform_get_drvdata(pdev);

	dwc3_omap_disable_irqs(omap);
	disable_irq(omap->irq);
	of_platform_depopulate(omap->dev);
	pm_runtime_put_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);

	return 0;
	}

	static const struct of_device_id of_dwc3_match[] = {
	{
	.compatible = "ti,dwc3"
	},
	{
	.compatible = "ti,am437x-dwc3"
	},
	{ },
	};
	MODULE_DEVICE_TABLE(of, of_dwc3_match);

	#ifdef CONFIG_PM_SLEEP
	static int dwc3_omap_suspend(struct device *dev)
	{
	struct dwc3_omap *omap = dev_get_drvdata(dev);

	omap->utmi_otg_ctrl = dwc3_omap_read_utmi_ctrl(omap);
	dwc3_omap_disable_irqs(omap);

	return 0;
	}

	static int dwc3_omap_resume(struct device *dev)
	{
	struct dwc3_omap *omap = dev_get_drvdata(dev);

	dwc3_omap_write_utmi_ctrl(omap, omap->utmi_otg_ctrl);
	dwc3_omap_enable_irqs(omap);

	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);

	return 0;
	}

	static void dwc3_omap_complete(struct device *dev)
	{
	struct dwc3_omap *omap = dev_get_drvdata(dev);

	if (extcon_get_state(omap->edev, EXTCON_USB))
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
	else
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);

	if (extcon_get_state(omap->edev, EXTCON_USB_HOST))
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
	else
	dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
	}

	static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
	.complete = dwc3_omap_complete,
	};

	#define DEV_PM_OPS (&dwc3_omap_dev_pm_ops)
	#else
	#define DEV_PM_OPS NULL
	#endif /* CONFIG_PM_SLEEP */

	static struct platform_driver dwc3_omap_driver = {
	.probe = dwc3_omap_probe,
	.remove = dwc3_omap_remove,
	.driver = {
	.name = "omap-dwc3",
	.of_match_table = of_dwc3_match,
	.pm = DEV_PM_OPS,
	},
	};

	module_platform_driver(dwc3_omap_driver);

	MODULE_ALIAS("platform:omap-dwc3");
	MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");