/**
   * 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>
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2  of
   * the License as published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   */
  
  #include <linux/module.h>
  #include <linux/kernel.h>
  #include <linux/slab.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/extcon/of_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_CTRL			0x0080
  #define USBOTGSS_UTMI_OTG_STATUS		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
  
  /* REVISION REGISTER */
  #define USBOTGSS_REVISION_XMAJOR(reg)		((reg >> 8) & 0x7)
  #define USBOTGSS_REVISION_XMAJOR1		1
  #define USBOTGSS_REVISION_XMAJOR2		2
  /* SYSCONFIG REGISTER */
  #define USBOTGSS_SYSCONFIG_DMADISABLE		(1 << 16)
  
  /* IRQ_EOI REGISTER */
  #define USBOTGSS_IRQ_EOI_LINE_NUMBER		(1 << 0)
  
  /* IRQS0 BITS */
  #define USBOTGSS_IRQO_COREIRQ_ST		(1 << 0)
  
  /* IRQMISC BITS */
  #define USBOTGSS_IRQMISC_DMADISABLECLR		(1 << 17)
  #define USBOTGSS_IRQMISC_OEVT			(1 << 16)
  #define USBOTGSS_IRQMISC_DRVVBUS_RISE		(1 << 13)
  #define USBOTGSS_IRQMISC_CHRGVBUS_RISE		(1 << 12)
  #define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE	(1 << 11)
  #define USBOTGSS_IRQMISC_IDPULLUP_RISE		(1 << 8)
  #define USBOTGSS_IRQMISC_DRVVBUS_FALL		(1 << 5)
  #define USBOTGSS_IRQMISC_CHRGVBUS_FALL		(1 << 4)
  #define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL		(1 << 3)
  #define USBOTGSS_IRQMISC_IDPULLUP_FALL		(1 << 0)
  
  /* UTMI_OTG_CTRL REGISTER */
  #define USBOTGSS_UTMI_OTG_CTRL_DRVVBUS		(1 << 5)
  #define USBOTGSS_UTMI_OTG_CTRL_CHRGVBUS		(1 << 4)
  #define USBOTGSS_UTMI_OTG_CTRL_DISCHRGVBUS	(1 << 3)
  #define USBOTGSS_UTMI_OTG_CTRL_IDPULLUP		(1 << 0)
  
  /* UTMI_OTG_STATUS REGISTER */
  #define USBOTGSS_UTMI_OTG_STATUS_SW_MODE	(1 << 31)
  #define USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT	(1 << 9)
  #define USBOTGSS_UTMI_OTG_STATUS_TXBITSTUFFENABLE (1 << 8)
  #define USBOTGSS_UTMI_OTG_STATUS_IDDIG		(1 << 4)
  #define USBOTGSS_UTMI_OTG_STATUS_SESSEND	(1 << 3)
  #define USBOTGSS_UTMI_OTG_STATUS_SESSVALID	(1 << 2)
  #define USBOTGSS_UTMI_OTG_STATUS_VBUSVALID	(1 << 1)
  
  struct dwc3_omap {
  	struct device		*dev;
  
  	int			irq;
  	void __iomem		*base;
  
  	u32			utmi_otg_status;
  	u32			utmi_otg_offset;
  	u32			irqmisc_offset;
  	u32			irq_eoi_offset;
  	u32			debug_offset;
  	u32			irq0_offset;
  	u32			revision;
  
  	u32			dma_status:1;
  
  	struct extcon_specific_cable_nb extcon_vbus_dev;
  	struct extcon_specific_cable_nb extcon_id_dev;
  	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_status(struct dwc3_omap *omap)
  {
  	return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS +
  							omap->utmi_otg_offset);
  }
  
  static void dwc3_omap_write_utmi_status(struct dwc3_omap *omap, u32 value)
  {
  	dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_STATUS +
  					omap->utmi_otg_offset, value);
  
  }
  
  static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
  {
  	return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_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_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_set_mailbox(struct dwc3_omap *omap,
  	enum omap_dwc3_vbus_id_status status)
  {
  	int	ret;
  	u32	val;
  
  	switch (status) {
  	case OMAP_DWC3_ID_GROUND:
  		dev_dbg(omap->dev, "ID GND
  ");
  
  		if (omap->vbus_reg) {
  			ret = regulator_enable(omap->vbus_reg);
  			if (ret) {
  				dev_dbg(omap->dev, "regulator enable failed
  ");
  				return;
  			}
  		}
  
  		val = dwc3_omap_read_utmi_status(omap);
  		val &= ~(USBOTGSS_UTMI_OTG_STATUS_IDDIG
  				| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_SESSEND);
  		val |= USBOTGSS_UTMI_OTG_STATUS_SESSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
  		dwc3_omap_write_utmi_status(omap, val);
  		break;
  
  	case OMAP_DWC3_VBUS_VALID:
  		dev_dbg(omap->dev, "VBUS Connect
  ");
  
  		val = dwc3_omap_read_utmi_status(omap);
  		val &= ~USBOTGSS_UTMI_OTG_STATUS_SESSEND;
  		val |= USBOTGSS_UTMI_OTG_STATUS_IDDIG
  				| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_SESSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT;
  		dwc3_omap_write_utmi_status(omap, val);
  		break;
  
  	case OMAP_DWC3_ID_FLOAT:
  		if (omap->vbus_reg)
  			regulator_disable(omap->vbus_reg);
  
  	case OMAP_DWC3_VBUS_OFF:
  		dev_dbg(omap->dev, "VBUS Disconnect
  ");
  
  		val = dwc3_omap_read_utmi_status(omap);
  		val &= ~(USBOTGSS_UTMI_OTG_STATUS_SESSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_VBUSVALID
  				| USBOTGSS_UTMI_OTG_STATUS_POWERPRESENT);
  		val |= USBOTGSS_UTMI_OTG_STATUS_SESSEND
  				| USBOTGSS_UTMI_OTG_STATUS_IDDIG;
  		dwc3_omap_write_utmi_status(omap, val);
  		break;
  
  	default:
  		dev_dbg(omap->dev, "invalid state
  ");
  	}
  }
  
  static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
  {
  	struct dwc3_omap	*omap = _omap;
  	u32			reg;
  
  	reg = dwc3_omap_read_irqmisc_status(omap);
  
  	if (reg & USBOTGSS_IRQMISC_DMADISABLECLR) {
  		dev_dbg(omap->dev, "DMA Disable was Cleared
  ");
  		omap->dma_status = false;
  	}
  
  	if (reg & USBOTGSS_IRQMISC_OEVT)
  		dev_dbg(omap->dev, "OTG Event
  ");
  
  	if (reg & USBOTGSS_IRQMISC_DRVVBUS_RISE)
  		dev_dbg(omap->dev, "DRVVBUS Rise
  ");
  
  	if (reg & USBOTGSS_IRQMISC_CHRGVBUS_RISE)
  		dev_dbg(omap->dev, "CHRGVBUS Rise
  ");
  
  	if (reg & USBOTGSS_IRQMISC_DISCHRGVBUS_RISE)
  		dev_dbg(omap->dev, "DISCHRGVBUS Rise
  ");
  
  	if (reg & USBOTGSS_IRQMISC_IDPULLUP_RISE)
  		dev_dbg(omap->dev, "IDPULLUP Rise
  ");
  
  	if (reg & USBOTGSS_IRQMISC_DRVVBUS_FALL)
  		dev_dbg(omap->dev, "DRVVBUS Fall
  ");
  
  	if (reg & USBOTGSS_IRQMISC_CHRGVBUS_FALL)
  		dev_dbg(omap->dev, "CHRGVBUS Fall
  ");
  
  	if (reg & USBOTGSS_IRQMISC_DISCHRGVBUS_FALL)
  		dev_dbg(omap->dev, "DISCHRGVBUS Fall
  ");
  
  	if (reg & USBOTGSS_IRQMISC_IDPULLUP_FALL)
  		dev_dbg(omap->dev, "IDPULLUP Fall
  ");
  
  	dwc3_omap_write_irqmisc_status(omap, reg);
  
  	reg = dwc3_omap_read_irq0_status(omap);
  
  	dwc3_omap_write_irq0_status(omap, reg);
  
  	return IRQ_HANDLED;
  }
  
  static int dwc3_omap_remove_core(struct device *dev, void *c)
  {
  	struct platform_device *pdev = to_platform_device(dev);
  
  	platform_device_unregister(pdev);
  
  	return 0;
  }
  
  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)
  {
  	/* disable all IRQs */
  	dwc3_omap_write_irqmisc_set(omap, 0x00);
  	dwc3_omap_write_irq0_set(omap, 0x00);
  }
  
  static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32);
  
  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 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 extcon_dev	*edev;
  	struct regulator	*vbus_reg = NULL;
  
  	int			ret = -ENOMEM;
  	int			irq;
  
  	int			utmi_mode = 0;
  	int			x_major;
  
  	u32			reg;
  
  	void __iomem		*base;
  
  	if (!node) {
  		dev_err(dev, "device node not found
  ");
  		return -EINVAL;
  	}
  
  	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
  	if (!omap) {
  		dev_err(dev, "not enough memory
  ");
  		return -ENOMEM;
  	}
  
  	platform_set_drvdata(pdev, omap);
  
  	irq = platform_get_irq(pdev, 0);
  	if (irq < 0) {
  		dev_err(dev, "missing IRQ resource
  ");
  		return -EINVAL;
  	}
  
  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	if (!res) {
  		dev_err(dev, "missing memory base resource
  ");
  		return -EINVAL;
  	}
  
  	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
  ");
  			return PTR_ERR(vbus_reg);
  		}
  	}
  
  	omap->dev	= dev;
  	omap->irq	= irq;
  	omap->base	= base;
  	omap->vbus_reg	= vbus_reg;
  	dev->dma_mask	= &dwc3_omap_dma_mask;
  
  	pm_runtime_enable(dev);
  	ret = pm_runtime_get_sync(dev);
  	if (ret < 0) {
  		dev_err(dev, "get_sync failed with err %d
  ", ret);
  		goto err0;
  	}
  
  	reg = dwc3_omap_readl(omap->base, USBOTGSS_REVISION);
  	omap->revision = reg;
  	x_major = USBOTGSS_REVISION_XMAJOR(reg);
  
  	/* Differentiate between OMAP5 and AM437x */
  	switch (x_major) {
  	case USBOTGSS_REVISION_XMAJOR1:
  	case USBOTGSS_REVISION_XMAJOR2:
  		omap->irq_eoi_offset = 0;
  		omap->irq0_offset = 0;
  		omap->irqmisc_offset = 0;
  		omap->utmi_otg_offset = 0;
  		omap->debug_offset = 0;
  		break;
  	default:
  		/* Default to the latest revision */
  		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;
  		break;
  	}
  
  	/* For OMAP5(ES2.0) and AM437x x_major is 2 even though there are
  	 * changes in wrapper registers, Using dt compatible for aegis
  	 */
  
  	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;
  	}
  
  	reg = dwc3_omap_read_utmi_status(omap);
  
  	of_property_read_u32(node, "utmi-mode", &utmi_mode);
  
  	switch (utmi_mode) {
  	case DWC3_OMAP_UTMI_MODE_SW:
  		reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
  		break;
  	case DWC3_OMAP_UTMI_MODE_HW:
  		reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
  		break;
  	default:
  		dev_dbg(dev, "UNKNOWN utmi mode %d
  ", utmi_mode);
  	}
  
  	dwc3_omap_write_utmi_status(omap, reg);
  
  	/* check the DMA Status */
  	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
  	omap->dma_status = !!(reg & USBOTGSS_SYSCONFIG_DMADISABLE);
  
  	ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
  			"dwc3-omap", omap);
  	if (ret) {
  		dev_err(dev, "failed to request IRQ #%d --> %d
  ",
  				omap->irq, ret);
  		goto err1;
  	}
  
  	dwc3_omap_enable_irqs(omap);
  
  	if (of_property_read_bool(node, "extcon")) {
  		edev = of_extcon_get_extcon_dev(dev, 0);
  		if (IS_ERR(edev)) {
  			dev_vdbg(dev, "couldn't get extcon device
  ");
  			ret = -EPROBE_DEFER;
  			goto err2;
  		}
  
  		omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
  		ret = extcon_register_interest(&omap->extcon_vbus_dev,
  			edev->name, "USB", &omap->vbus_nb);
  		if (ret < 0)
  			dev_vdbg(dev, "failed to register notifier for USB
  ");
  		omap->id_nb.notifier_call = dwc3_omap_id_notifier;
  		ret = extcon_register_interest(&omap->extcon_id_dev, edev->name,
  					 "USB-HOST", &omap->id_nb);
  		if (ret < 0)
  			dev_vdbg(dev,
  				"failed to register notifier for USB-HOST
  ");
  
  		if (extcon_get_cable_state(edev, "USB") == true)
  			dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
  		if (extcon_get_cable_state(edev, "USB-HOST") == true)
  			dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
  	}
  
  	ret = of_platform_populate(node, NULL, NULL, dev);
  	if (ret) {
  		dev_err(&pdev->dev, "failed to create dwc3 core
  ");
  		goto err3;
  	}
  
  	return 0;
  
  err3:
  	if (omap->extcon_vbus_dev.edev)
  		extcon_unregister_interest(&omap->extcon_vbus_dev);
  	if (omap->extcon_id_dev.edev)
  		extcon_unregister_interest(&omap->extcon_id_dev);
  
  err2:
  	dwc3_omap_disable_irqs(omap);
  
  err1:
  	pm_runtime_put_sync(dev);
  
  err0:
  	pm_runtime_disable(dev);
  
  	return ret;
  }
  
  static int dwc3_omap_remove(struct platform_device *pdev)
  {
  	struct dwc3_omap	*omap = platform_get_drvdata(pdev);
  
  	if (omap->extcon_vbus_dev.edev)
  		extcon_unregister_interest(&omap->extcon_vbus_dev);
  	if (omap->extcon_id_dev.edev)
  		extcon_unregister_interest(&omap->extcon_id_dev);
  	dwc3_omap_disable_irqs(omap);
  	device_for_each_child(&pdev->dev, NULL, dwc3_omap_remove_core);
  	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_prepare(struct device *dev)
  {
  	struct dwc3_omap	*omap = dev_get_drvdata(dev);
  
  	dwc3_omap_disable_irqs(omap);
  
  	return 0;
  }
  
  static void dwc3_omap_complete(struct device *dev)
  {
  	struct dwc3_omap	*omap = dev_get_drvdata(dev);
  
  	dwc3_omap_enable_irqs(omap);
  }
  
  static int dwc3_omap_suspend(struct device *dev)
  {
  	struct dwc3_omap	*omap = dev_get_drvdata(dev);
  
  	omap->utmi_otg_status = dwc3_omap_read_utmi_status(omap);
  
  	return 0;
  }
  
  static int dwc3_omap_resume(struct device *dev)
  {
  	struct dwc3_omap	*omap = dev_get_drvdata(dev);
  
  	dwc3_omap_write_utmi_status(omap, omap->utmi_otg_status);
  
  	pm_runtime_disable(dev);
  	pm_runtime_set_active(dev);
  	pm_runtime_enable(dev);
  
  	return 0;
  }
  
  static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
  	.prepare	= dwc3_omap_prepare,
  	.complete	= dwc3_omap_complete,
  
  	SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
  };
  
  #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");