drivers/phy/broadcom/phy-brcm-usb.c - linux - Git at Google

 /*
  * phy-brcm-usb.c - Broadcom USB Phy Driver
  *
  * Copyright (C) 2015-2017 Broadcom
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * 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/clk.h>
 #include <linux/delay.h>
 #include <linux/err.h>
 #include <linux/io.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
 #include <linux/interrupt.h>
 #include <linux/soc/brcmstb/brcmstb.h>
 #include <dt-bindings/phy/phy.h>

 #include "phy-brcm-usb-init.h"

 static DEFINE_MUTEX(sysfs_lock);

 enum brcm_usb_phy_id {
 	BRCM_USB_PHY_2_0 = 0,
 	BRCM_USB_PHY_3_0,
 	BRCM_USB_PHY_ID_MAX
 };

 struct value_to_name_map {
 	int value;
 	const char *name;
 };

 static struct value_to_name_map brcm_dr_mode_to_name[] = {
 	{ USB_CTLR_MODE_HOST, "host" },
 	{ USB_CTLR_MODE_DEVICE, "peripheral" },
 	{ USB_CTLR_MODE_DRD, "drd" },
 	{ USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
 };

 static struct value_to_name_map brcm_dual_mode_to_name[] = {
 	{ 0, "host" },
 	{ 1, "device" },
 	{ 2, "auto" },
 };

 struct brcm_usb_phy {
 	struct phy *phy;
 	unsigned int id;
 	bool inited;
 };

 struct brcm_usb_phy_data {
 	struct  brcm_usb_init_params ini;
 	bool			has_eohci;
 	bool			has_xhci;
 	struct clk		*usb_20_clk;
 	struct clk		*usb_30_clk;
 	struct mutex		mutex;	/* serialize phy init */
 	int			init_count;
 	struct brcm_usb_phy	phys[BRCM_USB_PHY_ID_MAX];
 };

 static int brcm_usb_phy_init(struct phy *gphy)
 {
 	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
 	struct brcm_usb_phy_data *priv =
 		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);

 	/*
 	 * Use a lock to make sure a second caller waits until
 	 * the base phy is inited before using it.
 	 */
 	mutex_lock(&priv->mutex);
 	if (priv->init_count++ == 0) {
 		clk_enable(priv->usb_20_clk);
 		clk_enable(priv->usb_30_clk);
 		brcm_usb_init_common(&priv->ini);
 	}
 	mutex_unlock(&priv->mutex);
 	if (phy->id == BRCM_USB_PHY_2_0)
 		brcm_usb_init_eohci(&priv->ini);
 	else if (phy->id == BRCM_USB_PHY_3_0)
 		brcm_usb_init_xhci(&priv->ini);
 	phy->inited = true;
 	dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
 		priv->init_count);

 	return 0;
 }

 static int brcm_usb_phy_exit(struct phy *gphy)
 {
 	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
 	struct brcm_usb_phy_data *priv =
 		container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);

 	dev_dbg(&gphy->dev, "EXIT\n");
 	if (phy->id == BRCM_USB_PHY_2_0)
 		brcm_usb_uninit_eohci(&priv->ini);
 	if (phy->id == BRCM_USB_PHY_3_0)
 		brcm_usb_uninit_xhci(&priv->ini);

 	/* If both xhci and eohci are gone, reset everything else */
 	mutex_lock(&priv->mutex);
 	if (--priv->init_count == 0) {
 		brcm_usb_uninit_common(&priv->ini);
 		clk_disable(priv->usb_20_clk);
 		clk_disable(priv->usb_30_clk);
 	}
 	mutex_unlock(&priv->mutex);
 	phy->inited = false;
 	return 0;
 }

 static struct phy_ops brcm_usb_phy_ops = {
 	.init		= brcm_usb_phy_init,
 	.exit		= brcm_usb_phy_exit,
 	.owner		= THIS_MODULE,
 };

 static struct phy *brcm_usb_phy_xlate(struct device *dev,
 				      struct of_phandle_args *args)
 {
 	struct brcm_usb_phy_data *data = dev_get_drvdata(dev);

 	/*
 	 * values 0 and 1 are for backward compatibility with
 	 * device tree nodes from older bootloaders.
 	 */
 	switch (args->args[0]) {
 	case 0:
 	case PHY_TYPE_USB2:
 		if (data->phys[BRCM_USB_PHY_2_0].phy)
 			return data->phys[BRCM_USB_PHY_2_0].phy;
 		dev_warn(dev, "Error, 2.0 Phy not found\n");
 		break;
 	case 1:
 	case PHY_TYPE_USB3:
 		if (data->phys[BRCM_USB_PHY_3_0].phy)
 			return data->phys[BRCM_USB_PHY_3_0].phy;
 		dev_warn(dev, "Error, 3.0 Phy not found\n");
 		break;
 	}
 	return ERR_PTR(-ENODEV);
 }

 static int name_to_value(struct value_to_name_map *table, int count,
 			 const char *name, int *value)
 {
 	int x;

 	*value = 0;
 	for (x = 0; x < count; x++) {
 		if (sysfs_streq(name, table[x].name)) {
 			*value = x;
 			return 0;
 		}
 	}
 	return -EINVAL;
 }

 static const char *value_to_name(struct value_to_name_map *table, int count,
 				 int value)
 {
 	if (value >= count)
 		return "unknown";
 	return table[value].name;
 }

 static ssize_t dr_mode_show(struct device *dev,
 			    struct device_attribute *attr,
 			    char *buf)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

 	return sprintf(buf, "%s\n",
 		value_to_name(&brcm_dr_mode_to_name[0],
 			      ARRAY_SIZE(brcm_dr_mode_to_name),
 			      priv->ini.mode));
 }
 static DEVICE_ATTR_RO(dr_mode);

 static ssize_t dual_select_store(struct device *dev,
 				 struct device_attribute *attr,
 				 const char *buf, size_t len)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 	int value;
 	int res;

 	mutex_lock(&sysfs_lock);
 	res = name_to_value(&brcm_dual_mode_to_name[0],
 			    ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
 	if (!res) {
 		brcm_usb_init_set_dual_select(&priv->ini, value);
 		res = len;
 	}
 	mutex_unlock(&sysfs_lock);
 	return res;
 }

 static ssize_t dual_select_show(struct device *dev,
 				struct device_attribute *attr,
 				char *buf)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
 	int value;

 	mutex_lock(&sysfs_lock);
 	value = brcm_usb_init_get_dual_select(&priv->ini);
 	mutex_unlock(&sysfs_lock);
 	return sprintf(buf, "%s\n",
 		value_to_name(&brcm_dual_mode_to_name[0],
 			      ARRAY_SIZE(brcm_dual_mode_to_name),
 			      value));
 }
 static DEVICE_ATTR_RW(dual_select);

 static struct attribute *brcm_usb_phy_attrs[] = {
 	&dev_attr_dr_mode.attr,
 	&dev_attr_dual_select.attr,
 	NULL
 };

 static const struct attribute_group brcm_usb_phy_group = {
 	.attrs = brcm_usb_phy_attrs,
 };

 static int brcm_usb_phy_dvr_init(struct device *dev,
 				 struct brcm_usb_phy_data *priv,
 				 struct device_node *dn)
 {
 	struct phy *gphy;
 	int err;

 	priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
 	if (IS_ERR(priv->usb_20_clk)) {
 		dev_info(dev, "Clock not found in Device Tree\n");
 		priv->usb_20_clk = NULL;
 	}
 	err = clk_prepare_enable(priv->usb_20_clk);
 	if (err)
 		return err;

 	if (priv->has_eohci) {
 		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
 		if (IS_ERR(gphy)) {
 			dev_err(dev, "failed to create EHCI/OHCI PHY\n");
 			return PTR_ERR(gphy);
 		}
 		priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
 		priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
 		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
 	}

 	if (priv->has_xhci) {
 		gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
 		if (IS_ERR(gphy)) {
 			dev_err(dev, "failed to create XHCI PHY\n");
 			return PTR_ERR(gphy);
 		}
 		priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
 		priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
 		phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);

 		priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
 		if (IS_ERR(priv->usb_30_clk)) {
 			dev_info(dev,
 				 "USB3.0 clock not found in Device Tree\n");
 			priv->usb_30_clk = NULL;
 		}
 		err = clk_prepare_enable(priv->usb_30_clk);
 		if (err)
 			return err;
 	}
 	return 0;
 }

 static int brcm_usb_phy_probe(struct platform_device *pdev)
 {
 	struct resource *res;
 	struct device *dev = &pdev->dev;
 	struct brcm_usb_phy_data *priv;
 	struct phy_provider *phy_provider;
 	struct device_node *dn = pdev->dev.of_node;
 	int err;
 	const char *mode;

 	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 	platform_set_drvdata(pdev, priv);

 	priv->ini.family_id = brcmstb_get_family_id();
 	priv->ini.product_id = brcmstb_get_product_id();
 	brcm_usb_set_family_map(&priv->ini);
 	dev_dbg(dev, "Best mapping table is for %s\n",
 		priv->ini.family_name);
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(dev, "can't get USB_CTRL base address\n");
 		return -EINVAL;
 	}
 	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(priv->ini.ctrl_regs)) {
 		dev_err(dev, "can't map CTRL register space\n");
 		return -EINVAL;
 	}

 	/* The XHCI EC registers are optional */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (res) {
 		priv->ini.xhci_ec_regs =
 			devm_ioremap_resource(dev, res);
 		if (IS_ERR(priv->ini.xhci_ec_regs)) {
 			dev_err(dev, "can't map XHCI EC register space\n");
 			return -EINVAL;
 		}
 	}

 	of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
 	of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);

 	priv->ini.mode = USB_CTLR_MODE_HOST;
 	err = of_property_read_string(dn, "dr_mode", &mode);
 	if (err == 0) {
 		name_to_value(&brcm_dr_mode_to_name[0],
 			      ARRAY_SIZE(brcm_dr_mode_to_name),
 			mode, &priv->ini.mode);
 	}
 	if (of_property_read_bool(dn, "brcm,has-xhci"))
 		priv->has_xhci = true;
 	if (of_property_read_bool(dn, "brcm,has-eohci"))
 		priv->has_eohci = true;

 	err = brcm_usb_phy_dvr_init(dev, priv, dn);
 	if (err)
 		return err;

 	mutex_init(&priv->mutex);

 	/* make sure invert settings are correct */
 	brcm_usb_init_ipp(&priv->ini);

 	/*
 	 * Create sysfs entries for mode.
 	 * Remove "dual_select" attribute if not in dual mode
 	 */
 	if (priv->ini.mode != USB_CTLR_MODE_DRD)
 		brcm_usb_phy_attrs[1] = NULL;
 	err = sysfs_create_group(&dev->kobj, &brcm_usb_phy_group);
 	if (err)
 		dev_warn(dev, "Error creating sysfs attributes\n");

 	/* start with everything off */
 	if (priv->has_xhci)
 		brcm_usb_uninit_xhci(&priv->ini);
 	if (priv->has_eohci)
 		brcm_usb_uninit_eohci(&priv->ini);
 	brcm_usb_uninit_common(&priv->ini);
 	clk_disable(priv->usb_20_clk);
 	clk_disable(priv->usb_30_clk);

 	phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
 	if (IS_ERR(phy_provider))
 		return PTR_ERR(phy_provider);

 	return 0;
 }

 #ifdef CONFIG_PM_SLEEP
 static int brcm_usb_phy_suspend(struct device *dev)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

 	if (priv->init_count) {
 		clk_disable(priv->usb_20_clk);
 		clk_disable(priv->usb_30_clk);
 	}
 	return 0;
 }

 static int brcm_usb_phy_resume(struct device *dev)
 {
 	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

 	clk_enable(priv->usb_20_clk);
 	clk_enable(priv->usb_30_clk);
 	brcm_usb_init_ipp(&priv->ini);

 	/*
 	 * Initialize anything that was previously initialized.
 	 * Uninitialize anything that wasn't previously initialized.
 	 */
 	if (priv->init_count) {
 		brcm_usb_init_common(&priv->ini);
 		if (priv->phys[BRCM_USB_PHY_2_0].inited) {
 			brcm_usb_init_eohci(&priv->ini);
 		} else if (priv->has_eohci) {
 			brcm_usb_uninit_eohci(&priv->ini);
 			clk_disable(priv->usb_20_clk);
 		}
 		if (priv->phys[BRCM_USB_PHY_3_0].inited) {
 			brcm_usb_init_xhci(&priv->ini);
 		} else if (priv->has_xhci) {
 			brcm_usb_uninit_xhci(&priv->ini);
 			clk_disable(priv->usb_30_clk);
 		}
 	} else {
 		if (priv->has_xhci)
 			brcm_usb_uninit_xhci(&priv->ini);
 		if (priv->has_eohci)
 			brcm_usb_uninit_eohci(&priv->ini);
 		brcm_usb_uninit_common(&priv->ini);
 		clk_disable(priv->usb_20_clk);
 		clk_disable(priv->usb_30_clk);
 	}

 	return 0;
 }
 #endif /* CONFIG_PM_SLEEP */

 static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
 	SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
 };

 static const struct of_device_id brcm_usb_dt_ids[] = {
 	{ .compatible = "brcm,brcmstb-usb-phy" },
 	{ /* sentinel */ }
 };

 MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);

 static struct platform_driver brcm_usb_driver = {
 	.probe		= brcm_usb_phy_probe,
 	.driver		= {
 		.name	= "brcmstb-usb-phy",
 		.owner	= THIS_MODULE,
 		.pm = &brcm_usb_phy_pm_ops,
 		.of_match_table = brcm_usb_dt_ids,
 	},
 };

 module_platform_driver(brcm_usb_driver);

 MODULE_ALIAS("platform:brcmstb-usb-phy");
 MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
 MODULE_DESCRIPTION("BRCM USB PHY driver");
 MODULE_LICENSE("GPL v2");
	/*
	* phy-brcm-usb.c - Broadcom USB Phy Driver
	*
	* Copyright (C) 2015-2017 Broadcom
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* 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/clk.h>
	#include <linux/delay.h>
	#include <linux/err.h>
	#include <linux/io.h>
	#include <linux/module.h>
	#include <linux/of.h>
	#include <linux/phy/phy.h>
	#include <linux/platform_device.h>
	#include <linux/interrupt.h>
	#include <linux/soc/brcmstb/brcmstb.h>
	#include <dt-bindings/phy/phy.h>

	#include "phy-brcm-usb-init.h"

	static DEFINE_MUTEX(sysfs_lock);

	enum brcm_usb_phy_id {
	BRCM_USB_PHY_2_0 = 0,
	BRCM_USB_PHY_3_0,
	BRCM_USB_PHY_ID_MAX
	};

	struct value_to_name_map {
	int value;
	const char *name;
	};

	static struct value_to_name_map brcm_dr_mode_to_name[] = {
	{ USB_CTLR_MODE_HOST, "host" },
	{ USB_CTLR_MODE_DEVICE, "peripheral" },
	{ USB_CTLR_MODE_DRD, "drd" },
	{ USB_CTLR_MODE_TYPEC_PD, "typec-pd" }
	};

	static struct value_to_name_map brcm_dual_mode_to_name[] = {
	{ 0, "host" },
	{ 1, "device" },
	{ 2, "auto" },
	};

	struct brcm_usb_phy {
	struct phy *phy;
	unsigned int id;
	bool inited;
	};

	struct brcm_usb_phy_data {
	struct brcm_usb_init_params ini;
	bool has_eohci;
	bool has_xhci;
	struct clk *usb_20_clk;
	struct clk *usb_30_clk;
	struct mutex mutex; /* serialize phy init */
	int init_count;
	struct brcm_usb_phy phys[BRCM_USB_PHY_ID_MAX];
	};

	static int brcm_usb_phy_init(struct phy *gphy)
	{
	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
	struct brcm_usb_phy_data *priv =
	container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);

	/*
	* Use a lock to make sure a second caller waits until
	* the base phy is inited before using it.
	*/
	mutex_lock(&priv->mutex);
	if (priv->init_count++ == 0) {
	clk_enable(priv->usb_20_clk);
	clk_enable(priv->usb_30_clk);
	brcm_usb_init_common(&priv->ini);
	}
	mutex_unlock(&priv->mutex);
	if (phy->id == BRCM_USB_PHY_2_0)
	brcm_usb_init_eohci(&priv->ini);
	else if (phy->id == BRCM_USB_PHY_3_0)
	brcm_usb_init_xhci(&priv->ini);
	phy->inited = true;
	dev_dbg(&gphy->dev, "INIT, id: %d, total: %d\n", phy->id,
	priv->init_count);

	return 0;
	}

	static int brcm_usb_phy_exit(struct phy *gphy)
	{
	struct brcm_usb_phy *phy = phy_get_drvdata(gphy);
	struct brcm_usb_phy_data *priv =
	container_of(phy, struct brcm_usb_phy_data, phys[phy->id]);

	dev_dbg(&gphy->dev, "EXIT\n");
	if (phy->id == BRCM_USB_PHY_2_0)
	brcm_usb_uninit_eohci(&priv->ini);
	if (phy->id == BRCM_USB_PHY_3_0)
	brcm_usb_uninit_xhci(&priv->ini);

	/* If both xhci and eohci are gone, reset everything else */
	mutex_lock(&priv->mutex);
	if (--priv->init_count == 0) {
	brcm_usb_uninit_common(&priv->ini);
	clk_disable(priv->usb_20_clk);
	clk_disable(priv->usb_30_clk);
	}
	mutex_unlock(&priv->mutex);
	phy->inited = false;
	return 0;
	}

	static struct phy_ops brcm_usb_phy_ops = {
	.init = brcm_usb_phy_init,
	.exit = brcm_usb_phy_exit,
	.owner = THIS_MODULE,
	};

	static struct phy brcm_usb_phy_xlate(struct device dev,
	struct of_phandle_args *args)
	{
	struct brcm_usb_phy_data *data = dev_get_drvdata(dev);

	/*
	* values 0 and 1 are for backward compatibility with
	* device tree nodes from older bootloaders.
	*/
	switch (args->args[0]) {
	case 0:
	case PHY_TYPE_USB2:
	if (data->phys[BRCM_USB_PHY_2_0].phy)
	return data->phys[BRCM_USB_PHY_2_0].phy;
	dev_warn(dev, "Error, 2.0 Phy not found\n");
	break;
	case 1:
	case PHY_TYPE_USB3:
	if (data->phys[BRCM_USB_PHY_3_0].phy)
	return data->phys[BRCM_USB_PHY_3_0].phy;
	dev_warn(dev, "Error, 3.0 Phy not found\n");
	break;
	}
	return ERR_PTR(-ENODEV);
	}

	static int name_to_value(struct value_to_name_map *table, int count,
	const char name, int value)
	{
	int x;

	*value = 0;
	for (x = 0; x < count; x++) {
	if (sysfs_streq(name, table[x].name)) {
	*value = x;
	return 0;
	}
	}
	return -EINVAL;
	}

	static const char value_to_name(struct value_to_name_map table, int count,
	int value)
	{
	if (value >= count)
	return "unknown";
	return table[value].name;
	}

	static ssize_t dr_mode_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

	return sprintf(buf, "%s\n",
	value_to_name(&brcm_dr_mode_to_name[0],
	ARRAY_SIZE(brcm_dr_mode_to_name),
	priv->ini.mode));
	}
	static DEVICE_ATTR_RO(dr_mode);

	static ssize_t dual_select_store(struct device *dev,
	struct device_attribute *attr,
	const char *buf, size_t len)
	{
	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
	int value;
	int res;

	mutex_lock(&sysfs_lock);
	res = name_to_value(&brcm_dual_mode_to_name[0],
	ARRAY_SIZE(brcm_dual_mode_to_name), buf, &value);
	if (!res) {
	brcm_usb_init_set_dual_select(&priv->ini, value);
	res = len;
	}
	mutex_unlock(&sysfs_lock);
	return res;
	}

	static ssize_t dual_select_show(struct device *dev,
	struct device_attribute *attr,
	char *buf)
	{
	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);
	int value;

	mutex_lock(&sysfs_lock);
	value = brcm_usb_init_get_dual_select(&priv->ini);
	mutex_unlock(&sysfs_lock);
	return sprintf(buf, "%s\n",
	value_to_name(&brcm_dual_mode_to_name[0],
	ARRAY_SIZE(brcm_dual_mode_to_name),
	value));
	}
	static DEVICE_ATTR_RW(dual_select);

	static struct attribute *brcm_usb_phy_attrs[] = {
	&dev_attr_dr_mode.attr,
	&dev_attr_dual_select.attr,
	NULL
	};

	static const struct attribute_group brcm_usb_phy_group = {
	.attrs = brcm_usb_phy_attrs,
	};

	static int brcm_usb_phy_dvr_init(struct device *dev,
	struct brcm_usb_phy_data *priv,
	struct device_node *dn)
	{
	struct phy *gphy;
	int err;

	priv->usb_20_clk = of_clk_get_by_name(dn, "sw_usb");
	if (IS_ERR(priv->usb_20_clk)) {
	dev_info(dev, "Clock not found in Device Tree\n");
	priv->usb_20_clk = NULL;
	}
	err = clk_prepare_enable(priv->usb_20_clk);
	if (err)
	return err;

	if (priv->has_eohci) {
	gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
	if (IS_ERR(gphy)) {
	dev_err(dev, "failed to create EHCI/OHCI PHY\n");
	return PTR_ERR(gphy);
	}
	priv->phys[BRCM_USB_PHY_2_0].phy = gphy;
	priv->phys[BRCM_USB_PHY_2_0].id = BRCM_USB_PHY_2_0;
	phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_2_0]);
	}

	if (priv->has_xhci) {
	gphy = devm_phy_create(dev, NULL, &brcm_usb_phy_ops);
	if (IS_ERR(gphy)) {
	dev_err(dev, "failed to create XHCI PHY\n");
	return PTR_ERR(gphy);
	}
	priv->phys[BRCM_USB_PHY_3_0].phy = gphy;
	priv->phys[BRCM_USB_PHY_3_0].id = BRCM_USB_PHY_3_0;
	phy_set_drvdata(gphy, &priv->phys[BRCM_USB_PHY_3_0]);

	priv->usb_30_clk = of_clk_get_by_name(dn, "sw_usb3");
	if (IS_ERR(priv->usb_30_clk)) {
	dev_info(dev,
	"USB3.0 clock not found in Device Tree\n");
	priv->usb_30_clk = NULL;
	}
	err = clk_prepare_enable(priv->usb_30_clk);
	if (err)
	return err;
	}
	return 0;
	}

	static int brcm_usb_phy_probe(struct platform_device *pdev)
	{
	struct resource *res;
	struct device *dev = &pdev->dev;
	struct brcm_usb_phy_data *priv;
	struct phy_provider *phy_provider;
	struct device_node *dn = pdev->dev.of_node;
	int err;
	const char *mode;

	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;
	platform_set_drvdata(pdev, priv);

	priv->ini.family_id = brcmstb_get_family_id();
	priv->ini.product_id = brcmstb_get_product_id();
	brcm_usb_set_family_map(&priv->ini);
	dev_dbg(dev, "Best mapping table is for %s\n",
	priv->ini.family_name);
	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(dev, "can't get USB_CTRL base address\n");
	return -EINVAL;
	}
	priv->ini.ctrl_regs = devm_ioremap_resource(dev, res);
	if (IS_ERR(priv->ini.ctrl_regs)) {
	dev_err(dev, "can't map CTRL register space\n");
	return -EINVAL;
	}

	/* The XHCI EC registers are optional */
	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	if (res) {
	priv->ini.xhci_ec_regs =
	devm_ioremap_resource(dev, res);
	if (IS_ERR(priv->ini.xhci_ec_regs)) {
	dev_err(dev, "can't map XHCI EC register space\n");
	return -EINVAL;
	}
	}

	of_property_read_u32(dn, "brcm,ipp", &priv->ini.ipp);
	of_property_read_u32(dn, "brcm,ioc", &priv->ini.ioc);

	priv->ini.mode = USB_CTLR_MODE_HOST;
	err = of_property_read_string(dn, "dr_mode", &mode);
	if (err == 0) {
	name_to_value(&brcm_dr_mode_to_name[0],
	ARRAY_SIZE(brcm_dr_mode_to_name),
	mode, &priv->ini.mode);
	}
	if (of_property_read_bool(dn, "brcm,has-xhci"))
	priv->has_xhci = true;
	if (of_property_read_bool(dn, "brcm,has-eohci"))
	priv->has_eohci = true;

	err = brcm_usb_phy_dvr_init(dev, priv, dn);
	if (err)
	return err;

	mutex_init(&priv->mutex);

	/* make sure invert settings are correct */
	brcm_usb_init_ipp(&priv->ini);

	/*
	* Create sysfs entries for mode.
	* Remove "dual_select" attribute if not in dual mode
	*/
	if (priv->ini.mode != USB_CTLR_MODE_DRD)
	brcm_usb_phy_attrs[1] = NULL;
	err = sysfs_create_group(&dev->kobj, &brcm_usb_phy_group);
	if (err)
	dev_warn(dev, "Error creating sysfs attributes\n");

	/* start with everything off */
	if (priv->has_xhci)
	brcm_usb_uninit_xhci(&priv->ini);
	if (priv->has_eohci)
	brcm_usb_uninit_eohci(&priv->ini);
	brcm_usb_uninit_common(&priv->ini);
	clk_disable(priv->usb_20_clk);
	clk_disable(priv->usb_30_clk);

	phy_provider = devm_of_phy_provider_register(dev, brcm_usb_phy_xlate);
	if (IS_ERR(phy_provider))
	return PTR_ERR(phy_provider);

	return 0;
	}

	#ifdef CONFIG_PM_SLEEP
	static int brcm_usb_phy_suspend(struct device *dev)
	{
	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

	if (priv->init_count) {
	clk_disable(priv->usb_20_clk);
	clk_disable(priv->usb_30_clk);
	}
	return 0;
	}

	static int brcm_usb_phy_resume(struct device *dev)
	{
	struct brcm_usb_phy_data *priv = dev_get_drvdata(dev);

	clk_enable(priv->usb_20_clk);
	clk_enable(priv->usb_30_clk);
	brcm_usb_init_ipp(&priv->ini);

	/*
	* Initialize anything that was previously initialized.
	* Uninitialize anything that wasn't previously initialized.
	*/
	if (priv->init_count) {
	brcm_usb_init_common(&priv->ini);
	if (priv->phys[BRCM_USB_PHY_2_0].inited) {
	brcm_usb_init_eohci(&priv->ini);
	} else if (priv->has_eohci) {
	brcm_usb_uninit_eohci(&priv->ini);
	clk_disable(priv->usb_20_clk);
	}
	if (priv->phys[BRCM_USB_PHY_3_0].inited) {
	brcm_usb_init_xhci(&priv->ini);
	} else if (priv->has_xhci) {
	brcm_usb_uninit_xhci(&priv->ini);
	clk_disable(priv->usb_30_clk);
	}
	} else {
	if (priv->has_xhci)
	brcm_usb_uninit_xhci(&priv->ini);
	if (priv->has_eohci)
	brcm_usb_uninit_eohci(&priv->ini);
	brcm_usb_uninit_common(&priv->ini);
	clk_disable(priv->usb_20_clk);
	clk_disable(priv->usb_30_clk);
	}

	return 0;
	}
	#endif /* CONFIG_PM_SLEEP */

	static const struct dev_pm_ops brcm_usb_phy_pm_ops = {
	SET_LATE_SYSTEM_SLEEP_PM_OPS(brcm_usb_phy_suspend, brcm_usb_phy_resume)
	};

	static const struct of_device_id brcm_usb_dt_ids[] = {
	{ .compatible = "brcm,brcmstb-usb-phy" },
	{ /* sentinel */ }
	};

	MODULE_DEVICE_TABLE(of, brcm_usb_dt_ids);

	static struct platform_driver brcm_usb_driver = {
	.probe = brcm_usb_phy_probe,
	.driver = {
	.name = "brcmstb-usb-phy",
	.owner = THIS_MODULE,
	.pm = &brcm_usb_phy_pm_ops,
	.of_match_table = brcm_usb_dt_ids,
	},
	};

	module_platform_driver(brcm_usb_driver);

	MODULE_ALIAS("platform:brcmstb-usb-phy");
	MODULE_AUTHOR("Al Cooper <acooper@broadcom.com>");
	MODULE_DESCRIPTION("BRCM USB PHY driver");
	MODULE_LICENSE("GPL v2");