drivers/usb/phy/phy-samsung-usb3.c - maze/linux - Git at Google

 /* linux/drivers/usb/phy/phy-samsung-usb3.c
  *
  * Copyright (c) 2013 Samsung Electronics Co., Ltd.
  *              http://www.samsung.com
  *
  * Author: Vivek Gautam <gautam.vivek@samsung.com>
  *
  * Samsung USB 3.0 PHY transceiver; talks to DWC3 controller.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 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/platform_device.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/usb/samsung_usb_phy.h>
 #include <linux/platform_data/samsung-usbphy.h>

 #include "phy-samsung-usb.h"

 /*
  * Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from clock core.
  */
 static u32 samsung_usb3phy_set_refclk(struct samsung_usbphy *sphy)
 {
 	u32 reg;
 	u32 refclk;

 	refclk = sphy->ref_clk_freq;

 	reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK |
 		PHYCLKRST_FSEL(refclk);

 	switch (refclk) {
 	case FSEL_CLKSEL_50M:
 		reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
 			PHYCLKRST_SSC_REFCLKSEL(0x00));
 		break;
 	case FSEL_CLKSEL_20M:
 		reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
 			PHYCLKRST_SSC_REFCLKSEL(0x00));
 		break;
 	case FSEL_CLKSEL_19200K:
 		reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
 			PHYCLKRST_SSC_REFCLKSEL(0x88));
 		break;
 	case FSEL_CLKSEL_24M:
 	default:
 		reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
 			PHYCLKRST_SSC_REFCLKSEL(0x88));
 		break;
 	}

 	return reg;
 }

 static void samsung_exynos5_usb3phy_enable(struct samsung_usbphy *sphy)
 {
 	void __iomem *regs = sphy->regs;
 	u32 phyparam0;
 	u32 phyparam1;
 	u32 linksystem;
 	u32 phybatchg;
 	u32 phytest;
 	u32 phyclkrst;

 	/* Reset USB 3.0 PHY */
 	writel(0x0, regs + EXYNOS5_DRD_PHYREG0);

 	phyparam0 = readl(regs + EXYNOS5_DRD_PHYPARAM0);
 	/* Select PHY CLK source */
 	phyparam0 &= ~PHYPARAM0_REF_USE_PAD;
 	/* Set Loss-of-Signal Detector sensitivity */
 	phyparam0 &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
 	phyparam0 |= PHYPARAM0_REF_LOSLEVEL;
 	writel(phyparam0, regs + EXYNOS5_DRD_PHYPARAM0);

 	writel(0x0, regs + EXYNOS5_DRD_PHYRESUME);

 	/*
 	 * Setting the Frame length Adj value[6:1] to default 0x20
 	 * See xHCI 1.0 spec, 5.2.4
 	 */
 	linksystem = LINKSYSTEM_XHCI_VERSION_CONTROL |
 			LINKSYSTEM_FLADJ(0x20);
 	writel(linksystem, regs + EXYNOS5_DRD_LINKSYSTEM);

 	phyparam1 = readl(regs + EXYNOS5_DRD_PHYPARAM1);
 	/* Set Tx De-Emphasis level */
 	phyparam1 &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
 	phyparam1 |= PHYPARAM1_PCS_TXDEEMPH;
 	writel(phyparam1, regs + EXYNOS5_DRD_PHYPARAM1);

 	phybatchg = readl(regs + EXYNOS5_DRD_PHYBATCHG);
 	phybatchg |= PHYBATCHG_UTMI_CLKSEL;
 	writel(phybatchg, regs + EXYNOS5_DRD_PHYBATCHG);

 	/* PHYTEST POWERDOWN Control */
 	phytest = readl(regs + EXYNOS5_DRD_PHYTEST);
 	phytest &= ~(PHYTEST_POWERDOWN_SSP |
 			PHYTEST_POWERDOWN_HSP);
 	writel(phytest, regs + EXYNOS5_DRD_PHYTEST);

 	/* UTMI Power Control */
 	writel(PHYUTMI_OTGDISABLE, regs + EXYNOS5_DRD_PHYUTMI);

 	phyclkrst = samsung_usb3phy_set_refclk(sphy);

 	phyclkrst |= PHYCLKRST_PORTRESET |
 			/* Digital power supply in normal operating mode */
 			PHYCLKRST_RETENABLEN |
 			/* Enable ref clock for SS function */
 			PHYCLKRST_REF_SSP_EN |
 			/* Enable spread spectrum */
 			PHYCLKRST_SSC_EN |
 			/* Power down HS Bias and PLL blocks in suspend mode */
 			PHYCLKRST_COMMONONN;

 	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);

 	udelay(10);

 	phyclkrst &= ~(PHYCLKRST_PORTRESET);
 	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);
 }

 static void samsung_exynos5_usb3phy_disable(struct samsung_usbphy *sphy)
 {
 	u32 phyutmi;
 	u32 phyclkrst;
 	u32 phytest;
 	void __iomem *regs = sphy->regs;

 	phyutmi = PHYUTMI_OTGDISABLE |
 			PHYUTMI_FORCESUSPEND |
 			PHYUTMI_FORCESLEEP;
 	writel(phyutmi, regs + EXYNOS5_DRD_PHYUTMI);

 	/* Resetting the PHYCLKRST enable bits to reduce leakage current */
 	phyclkrst = readl(regs + EXYNOS5_DRD_PHYCLKRST);
 	phyclkrst &= ~(PHYCLKRST_REF_SSP_EN |
 			PHYCLKRST_SSC_EN |
 			PHYCLKRST_COMMONONN);
 	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);

 	/* Control PHYTEST to remove leakage current */
 	phytest = readl(regs + EXYNOS5_DRD_PHYTEST);
 	phytest |= (PHYTEST_POWERDOWN_SSP |
 			PHYTEST_POWERDOWN_HSP);
 	writel(phytest, regs + EXYNOS5_DRD_PHYTEST);
 }

 static int samsung_usb3phy_init(struct usb_phy *phy)
 {
 	struct samsung_usbphy *sphy;
 	unsigned long flags;
 	int ret = 0;

 	sphy = phy_to_sphy(phy);

 	/* Enable the phy clock */
 	ret = clk_prepare_enable(sphy->clk);
 	if (ret) {
 		dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
 		return ret;
 	}

 	spin_lock_irqsave(&sphy->lock, flags);

 	/* setting default phy-type for USB 3.0 */
 	samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);

 	/* Disable phy isolation */
 	if (sphy->drv_data->set_isolation)
 		sphy->drv_data->set_isolation(sphy, false);

 	/* Initialize usb phy registers */
 	sphy->drv_data->phy_enable(sphy);

 	spin_unlock_irqrestore(&sphy->lock, flags);

 	/* Disable the phy clock */
 	clk_disable_unprepare(sphy->clk);

 	return ret;
 }

 /*
  * The function passed to the usb driver for phy shutdown
  */
 static void samsung_usb3phy_shutdown(struct usb_phy *phy)
 {
 	struct samsung_usbphy *sphy;
 	unsigned long flags;

 	sphy = phy_to_sphy(phy);

 	if (clk_prepare_enable(sphy->clk)) {
 		dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
 		return;
 	}

 	spin_lock_irqsave(&sphy->lock, flags);

 	/* setting default phy-type for USB 3.0 */
 	samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);

 	/* De-initialize usb phy registers */
 	sphy->drv_data->phy_disable(sphy);

 	/* Enable phy isolation */
 	if (sphy->drv_data->set_isolation)
 		sphy->drv_data->set_isolation(sphy, true);

 	spin_unlock_irqrestore(&sphy->lock, flags);

 	clk_disable_unprepare(sphy->clk);
 }

 static int samsung_usb3phy_probe(struct platform_device *pdev)
 {
 	struct samsung_usbphy *sphy;
 	struct samsung_usbphy_data *pdata = dev_get_platdata(&pdev->dev);
 	struct device *dev = &pdev->dev;
 	struct resource *phy_mem;
 	void __iomem	*phy_base;
 	struct clk *clk;
 	int ret;

 	phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	phy_base = devm_ioremap_resource(dev, phy_mem);
 	if (IS_ERR(phy_base))
 		return PTR_ERR(phy_base);

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

 	clk = devm_clk_get(dev, "usbdrd30");
 	if (IS_ERR(clk)) {
 		dev_err(dev, "Failed to get device clock\n");
 		return PTR_ERR(clk);
 	}

 	sphy->dev = dev;

 	if (dev->of_node) {
 		ret = samsung_usbphy_parse_dt(sphy);
 		if (ret < 0)
 			return ret;
 	} else {
 		if (!pdata) {
 			dev_err(dev, "no platform data specified\n");
 			return -EINVAL;
 		}
 	}

 	sphy->plat		= pdata;
 	sphy->regs		= phy_base;
 	sphy->clk		= clk;
 	sphy->phy.dev		= sphy->dev;
 	sphy->phy.label		= "samsung-usb3phy";
 	sphy->phy.type		= USB_PHY_TYPE_USB3;
 	sphy->phy.init		= samsung_usb3phy_init;
 	sphy->phy.shutdown	= samsung_usb3phy_shutdown;
 	sphy->drv_data		= samsung_usbphy_get_driver_data(pdev);

 	sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy);
 	if (sphy->ref_clk_freq < 0)
 		return -EINVAL;

 	spin_lock_init(&sphy->lock);

 	platform_set_drvdata(pdev, sphy);

 	return usb_add_phy_dev(&sphy->phy);
 }

 static int samsung_usb3phy_remove(struct platform_device *pdev)
 {
 	struct samsung_usbphy *sphy = platform_get_drvdata(pdev);

 	usb_remove_phy(&sphy->phy);

 	if (sphy->pmuregs)
 		iounmap(sphy->pmuregs);
 	if (sphy->sysreg)
 		iounmap(sphy->sysreg);

 	return 0;
 }

 static struct samsung_usbphy_drvdata usb3phy_exynos5 = {
 	.cpu_type		= TYPE_EXYNOS5250,
 	.devphy_en_mask		= EXYNOS_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_4x12,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
 	.phy_enable		= samsung_exynos5_usb3phy_enable,
 	.phy_disable		= samsung_exynos5_usb3phy_disable,
 };

 #ifdef CONFIG_OF
 static const struct of_device_id samsung_usbphy_dt_match[] = {
 	{
 		.compatible = "samsung,exynos5250-usb3phy",
 		.data = &usb3phy_exynos5
 	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
 #endif

 static struct platform_device_id samsung_usbphy_driver_ids[] = {
 	{
 		.name		= "exynos5250-usb3phy",
 		.driver_data	= (unsigned long)&usb3phy_exynos5,
 	},
 	{},
 };

 MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);

 static struct platform_driver samsung_usb3phy_driver = {
 	.probe		= samsung_usb3phy_probe,
 	.remove		= samsung_usb3phy_remove,
 	.id_table	= samsung_usbphy_driver_ids,
 	.driver		= {
 		.name	= "samsung-usb3phy",
 		.owner	= THIS_MODULE,
 		.of_match_table = of_match_ptr(samsung_usbphy_dt_match),
 	},
 };

 module_platform_driver(samsung_usb3phy_driver);

 MODULE_DESCRIPTION("Samsung USB 3.0 phy controller");
 MODULE_AUTHOR("Vivek Gautam <gautam.vivek@samsung.com>");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS("platform:samsung-usb3phy");
	/* linux/drivers/usb/phy/phy-samsung-usb3.c
	*
	* Copyright (c) 2013 Samsung Electronics Co., Ltd.
	* http://www.samsung.com
	*
	* Author: Vivek Gautam <gautam.vivek@samsung.com>
	*
	* Samsung USB 3.0 PHY transceiver; talks to DWC3 controller.
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 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/platform_device.h>
	#include <linux/clk.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/of.h>
	#include <linux/usb/samsung_usb_phy.h>
	#include <linux/platform_data/samsung-usbphy.h>

	#include "phy-samsung-usb.h"

	/*
	* Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from clock core.
	*/
	static u32 samsung_usb3phy_set_refclk(struct samsung_usbphy *sphy)
	{
	u32 reg;
	u32 refclk;

	refclk = sphy->ref_clk_freq;

	reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK \|
	PHYCLKRST_FSEL(refclk);

	switch (refclk) {
	case FSEL_CLKSEL_50M:
	reg \|= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF \|
	PHYCLKRST_SSC_REFCLKSEL(0x00));
	break;
	case FSEL_CLKSEL_20M:
	reg \|= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF \|
	PHYCLKRST_SSC_REFCLKSEL(0x00));
	break;
	case FSEL_CLKSEL_19200K:
	reg \|= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF \|
	PHYCLKRST_SSC_REFCLKSEL(0x88));
	break;
	case FSEL_CLKSEL_24M:
	default:
	reg \|= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF \|
	PHYCLKRST_SSC_REFCLKSEL(0x88));
	break;
	}

	return reg;
	}

	static void samsung_exynos5_usb3phy_enable(struct samsung_usbphy *sphy)
	{
	void __iomem *regs = sphy->regs;
	u32 phyparam0;
	u32 phyparam1;
	u32 linksystem;
	u32 phybatchg;
	u32 phytest;
	u32 phyclkrst;

	/* Reset USB 3.0 PHY */
	writel(0x0, regs + EXYNOS5_DRD_PHYREG0);

	phyparam0 = readl(regs + EXYNOS5_DRD_PHYPARAM0);
	/* Select PHY CLK source */
	phyparam0 &= ~PHYPARAM0_REF_USE_PAD;
	/* Set Loss-of-Signal Detector sensitivity */
	phyparam0 &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
	phyparam0 \|= PHYPARAM0_REF_LOSLEVEL;
	writel(phyparam0, regs + EXYNOS5_DRD_PHYPARAM0);

	writel(0x0, regs + EXYNOS5_DRD_PHYRESUME);

	/*
	* Setting the Frame length Adj value[6:1] to default 0x20
	* See xHCI 1.0 spec, 5.2.4
	*/
	linksystem = LINKSYSTEM_XHCI_VERSION_CONTROL \|
	LINKSYSTEM_FLADJ(0x20);
	writel(linksystem, regs + EXYNOS5_DRD_LINKSYSTEM);

	phyparam1 = readl(regs + EXYNOS5_DRD_PHYPARAM1);
	/* Set Tx De-Emphasis level */
	phyparam1 &= ~PHYPARAM1_PCS_TXDEEMPH_MASK;
	phyparam1 \|= PHYPARAM1_PCS_TXDEEMPH;
	writel(phyparam1, regs + EXYNOS5_DRD_PHYPARAM1);

	phybatchg = readl(regs + EXYNOS5_DRD_PHYBATCHG);
	phybatchg \|= PHYBATCHG_UTMI_CLKSEL;
	writel(phybatchg, regs + EXYNOS5_DRD_PHYBATCHG);

	/* PHYTEST POWERDOWN Control */
	phytest = readl(regs + EXYNOS5_DRD_PHYTEST);
	phytest &= ~(PHYTEST_POWERDOWN_SSP \|
	PHYTEST_POWERDOWN_HSP);
	writel(phytest, regs + EXYNOS5_DRD_PHYTEST);

	/* UTMI Power Control */
	writel(PHYUTMI_OTGDISABLE, regs + EXYNOS5_DRD_PHYUTMI);

	phyclkrst = samsung_usb3phy_set_refclk(sphy);

	phyclkrst \|= PHYCLKRST_PORTRESET \|
	/* Digital power supply in normal operating mode */
	PHYCLKRST_RETENABLEN \|
	/* Enable ref clock for SS function */
	PHYCLKRST_REF_SSP_EN \|
	/* Enable spread spectrum */
	PHYCLKRST_SSC_EN \|
	/* Power down HS Bias and PLL blocks in suspend mode */
	PHYCLKRST_COMMONONN;

	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);

	udelay(10);

	phyclkrst &= ~(PHYCLKRST_PORTRESET);
	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);
	}

	static void samsung_exynos5_usb3phy_disable(struct samsung_usbphy *sphy)
	{
	u32 phyutmi;
	u32 phyclkrst;
	u32 phytest;
	void __iomem *regs = sphy->regs;

	phyutmi = PHYUTMI_OTGDISABLE \|
	PHYUTMI_FORCESUSPEND \|
	PHYUTMI_FORCESLEEP;
	writel(phyutmi, regs + EXYNOS5_DRD_PHYUTMI);

	/* Resetting the PHYCLKRST enable bits to reduce leakage current */
	phyclkrst = readl(regs + EXYNOS5_DRD_PHYCLKRST);
	phyclkrst &= ~(PHYCLKRST_REF_SSP_EN \|
	PHYCLKRST_SSC_EN \|
	PHYCLKRST_COMMONONN);
	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);

	/* Control PHYTEST to remove leakage current */
	phytest = readl(regs + EXYNOS5_DRD_PHYTEST);
	phytest \|= (PHYTEST_POWERDOWN_SSP \|
	PHYTEST_POWERDOWN_HSP);
	writel(phytest, regs + EXYNOS5_DRD_PHYTEST);
	}

	static int samsung_usb3phy_init(struct usb_phy *phy)
	{
	struct samsung_usbphy *sphy;
	unsigned long flags;
	int ret = 0;

	sphy = phy_to_sphy(phy);

	/* Enable the phy clock */
	ret = clk_prepare_enable(sphy->clk);
	if (ret) {
	dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
	return ret;
	}

	spin_lock_irqsave(&sphy->lock, flags);

	/* setting default phy-type for USB 3.0 */
	samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);

	/* Disable phy isolation */
	if (sphy->drv_data->set_isolation)
	sphy->drv_data->set_isolation(sphy, false);

	/* Initialize usb phy registers */
	sphy->drv_data->phy_enable(sphy);

	spin_unlock_irqrestore(&sphy->lock, flags);

	/* Disable the phy clock */
	clk_disable_unprepare(sphy->clk);

	return ret;
	}

	/*
	* The function passed to the usb driver for phy shutdown
	*/
	static void samsung_usb3phy_shutdown(struct usb_phy *phy)
	{
	struct samsung_usbphy *sphy;
	unsigned long flags;

	sphy = phy_to_sphy(phy);

	if (clk_prepare_enable(sphy->clk)) {
	dev_err(sphy->dev, "%s: clk_prepare_enable failed\n", __func__);
	return;
	}

	spin_lock_irqsave(&sphy->lock, flags);

	/* setting default phy-type for USB 3.0 */
	samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);

	/* De-initialize usb phy registers */
	sphy->drv_data->phy_disable(sphy);

	/* Enable phy isolation */
	if (sphy->drv_data->set_isolation)
	sphy->drv_data->set_isolation(sphy, true);

	spin_unlock_irqrestore(&sphy->lock, flags);

	clk_disable_unprepare(sphy->clk);
	}

	static int samsung_usb3phy_probe(struct platform_device *pdev)
	{
	struct samsung_usbphy *sphy;
	struct samsung_usbphy_data *pdata = dev_get_platdata(&pdev->dev);
	struct device *dev = &pdev->dev;
	struct resource *phy_mem;
	void __iomem *phy_base;
	struct clk *clk;
	int ret;

	phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	phy_base = devm_ioremap_resource(dev, phy_mem);
	if (IS_ERR(phy_base))
	return PTR_ERR(phy_base);

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

	clk = devm_clk_get(dev, "usbdrd30");
	if (IS_ERR(clk)) {
	dev_err(dev, "Failed to get device clock\n");
	return PTR_ERR(clk);
	}

	sphy->dev = dev;

	if (dev->of_node) {
	ret = samsung_usbphy_parse_dt(sphy);
	if (ret < 0)
	return ret;
	} else {
	if (!pdata) {
	dev_err(dev, "no platform data specified\n");
	return -EINVAL;
	}
	}

	sphy->plat = pdata;
	sphy->regs = phy_base;
	sphy->clk = clk;
	sphy->phy.dev = sphy->dev;
	sphy->phy.label = "samsung-usb3phy";
	sphy->phy.type = USB_PHY_TYPE_USB3;
	sphy->phy.init = samsung_usb3phy_init;
	sphy->phy.shutdown = samsung_usb3phy_shutdown;
	sphy->drv_data = samsung_usbphy_get_driver_data(pdev);

	sphy->ref_clk_freq = samsung_usbphy_get_refclk_freq(sphy);
	if (sphy->ref_clk_freq < 0)
	return -EINVAL;

	spin_lock_init(&sphy->lock);

	platform_set_drvdata(pdev, sphy);

	return usb_add_phy_dev(&sphy->phy);
	}

	static int samsung_usb3phy_remove(struct platform_device *pdev)
	{
	struct samsung_usbphy *sphy = platform_get_drvdata(pdev);

	usb_remove_phy(&sphy->phy);

	if (sphy->pmuregs)
	iounmap(sphy->pmuregs);
	if (sphy->sysreg)
	iounmap(sphy->sysreg);

	return 0;
	}

	static struct samsung_usbphy_drvdata usb3phy_exynos5 = {
	.cpu_type = TYPE_EXYNOS5250,
	.devphy_en_mask = EXYNOS_USBPHY_ENABLE,
	.rate_to_clksel = samsung_usbphy_rate_to_clksel_4x12,
	.set_isolation = samsung_usbphy_set_isolation_4210,
	.phy_enable = samsung_exynos5_usb3phy_enable,
	.phy_disable = samsung_exynos5_usb3phy_disable,
	};

	#ifdef CONFIG_OF
	static const struct of_device_id samsung_usbphy_dt_match[] = {
	{
	.compatible = "samsung,exynos5250-usb3phy",
	.data = &usb3phy_exynos5
	},
	{},
	};
	MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
	#endif

	static struct platform_device_id samsung_usbphy_driver_ids[] = {
	{
	.name = "exynos5250-usb3phy",
	.driver_data = (unsigned long)&usb3phy_exynos5,
	},
	{},
	};

	MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);

	static struct platform_driver samsung_usb3phy_driver = {
	.probe = samsung_usb3phy_probe,
	.remove = samsung_usb3phy_remove,
	.id_table = samsung_usbphy_driver_ids,
	.driver = {
	.name = "samsung-usb3phy",
	.owner = THIS_MODULE,
	.of_match_table = of_match_ptr(samsung_usbphy_dt_match),
	},
	};

	module_platform_driver(samsung_usb3phy_driver);

	MODULE_DESCRIPTION("Samsung USB 3.0 phy controller");
	MODULE_AUTHOR("Vivek Gautam <gautam.vivek@samsung.com>");
	MODULE_LICENSE("GPL");
	MODULE_ALIAS("platform:samsung-usb3phy");