drivers/usb/chipidea/ci_hdrc_imx.c - kernel/bruno - Git at Google

 /*
  * Copyright 2012 Freescale Semiconductor, Inc.
  * Copyright (C) 2012 Marek Vasut <marex@denx.de>
  * on behalf of DENX Software Engineering GmbH
  *
  * The code contained herein is licensed under the GNU General Public
  * License. You may obtain a copy of the GNU General Public License
  * Version 2 or later at the following locations:
  *
  * http://www.opensource.org/licenses/gpl-license.html
  * http://www.gnu.org/copyleft/gpl.html
  */

 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/of_gpio.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/usb/chipidea.h>
 #include <linux/clk.h>

 #include "ci.h"
 #include "ci_hdrc_imx.h"

 struct ci_hdrc_imx_platform_flag {
 	unsigned int flags;
 	bool runtime_pm;
 };

 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
 	.flags = CI_HDRC_IMX28_WRITE_FIX |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_HOST_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON |
 		CI_HDRC_DISABLE_HOST_STREAMING,
 };

 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
 		CI_HDRC_TURN_VBUS_EARLY_ON,
 };

 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
 	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
 };

 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
 	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
 	{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
 	{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
 	{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
 	{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
 	{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
 	{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);

 struct ci_hdrc_imx_data {
 	struct usb_phy *phy;
 	struct platform_device *ci_pdev;
 	struct clk *clk;
 	struct imx_usbmisc_data *usbmisc_data;
 	bool supports_runtime_pm;
 	bool in_lpm;
 	/* SoC before i.mx6 (except imx23/imx28) needs three clks */
 	bool need_three_clks;
 	struct clk *clk_ipg;
 	struct clk *clk_ahb;
 	struct clk *clk_per;
 	/* --------------------------------- */
 };

 /* Common functions shared by usbmisc drivers */

 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
 {
 	struct platform_device *misc_pdev;
 	struct device_node *np = dev->of_node;
 	struct of_phandle_args args;
 	struct imx_usbmisc_data *data;
 	int ret;

 	/*
 	 * In case the fsl,usbmisc property is not present this device doesn't
 	 * need usbmisc. Return NULL (which is no error here)
 	 */
 	if (!of_get_property(np, "fsl,usbmisc", NULL))
 		return NULL;

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

 	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
 					0, &args);
 	if (ret) {
 		dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
 			ret);
 		return ERR_PTR(ret);
 	}

 	data->index = args.args[0];

 	misc_pdev = of_find_device_by_node(args.np);
 	of_node_put(args.np);

 	if (!misc_pdev || !platform_get_drvdata(misc_pdev))
 		return ERR_PTR(-EPROBE_DEFER);

 	data->dev = &misc_pdev->dev;

 	if (of_find_property(np, "disable-over-current", NULL))
 		data->disable_oc = 1;

 	if (of_find_property(np, "external-vbus-divider", NULL))
 		data->evdo = 1;

 	return data;
 }

 /* End of common functions shared by usbmisc drivers*/
 static int imx_get_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	data->clk_ipg = devm_clk_get(dev, "ipg");
 	if (IS_ERR(data->clk_ipg)) {
 		/* If the platform only needs one clocks */
 		data->clk = devm_clk_get(dev, NULL);
 		if (IS_ERR(data->clk)) {
 			ret = PTR_ERR(data->clk);
 			dev_err(dev,
 				"Failed to get clks, err=%ld,%ld\n",
 				PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
 			return ret;
 		}
 		return ret;
 	}

 	data->clk_ahb = devm_clk_get(dev, "ahb");
 	if (IS_ERR(data->clk_ahb)) {
 		ret = PTR_ERR(data->clk_ahb);
 		dev_err(dev,
 			"Failed to get ahb clock, err=%d\n", ret);
 		return ret;
 	}

 	data->clk_per = devm_clk_get(dev, "per");
 	if (IS_ERR(data->clk_per)) {
 		ret = PTR_ERR(data->clk_per);
 		dev_err(dev,
 			"Failed to get per clock, err=%d\n", ret);
 		return ret;
 	}

 	data->need_three_clks = true;
 	return ret;
 }

 static int imx_prepare_enable_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	if (data->need_three_clks) {
 		ret = clk_prepare_enable(data->clk_ipg);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable ipg clk, err=%d\n",
 				ret);
 			return ret;
 		}

 		ret = clk_prepare_enable(data->clk_ahb);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable ahb clk, err=%d\n",
 				ret);
 			clk_disable_unprepare(data->clk_ipg);
 			return ret;
 		}

 		ret = clk_prepare_enable(data->clk_per);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable per clk, err=%d\n",
 				ret);
 			clk_disable_unprepare(data->clk_ahb);
 			clk_disable_unprepare(data->clk_ipg);
 			return ret;
 		}
 	} else {
 		ret = clk_prepare_enable(data->clk);
 		if (ret) {
 			dev_err(dev,
 				"Failed to prepare/enable clk, err=%d\n",
 				ret);
 			return ret;
 		}
 	}

 	return ret;
 }

 static void imx_disable_unprepare_clks(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	if (data->need_three_clks) {
 		clk_disable_unprepare(data->clk_per);
 		clk_disable_unprepare(data->clk_ahb);
 		clk_disable_unprepare(data->clk_ipg);
 	} else {
 		clk_disable_unprepare(data->clk);
 	}
 }

 static int ci_hdrc_imx_probe(struct platform_device *pdev)
 {
 	struct ci_hdrc_imx_data *data;
 	struct ci_hdrc_platform_data pdata = {
 		.name		= dev_name(&pdev->dev),
 		.capoffset	= DEF_CAPOFFSET,
 		.flags		= CI_HDRC_SET_NON_ZERO_TTHA,
 	};
 	int ret;
 	const struct of_device_id *of_id;
 	const struct ci_hdrc_imx_platform_flag *imx_platform_flag;

 	of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
 	if (!of_id)
 		return -ENODEV;

 	imx_platform_flag = of_id->data;

 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;

 	platform_set_drvdata(pdev, data);
 	data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
 	if (IS_ERR(data->usbmisc_data))
 		return PTR_ERR(data->usbmisc_data);

 	ret = imx_get_clks(&pdev->dev);
 	if (ret)
 		return ret;

 	ret = imx_prepare_enable_clks(&pdev->dev);
 	if (ret)
 		return ret;

 	data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
 	if (IS_ERR(data->phy)) {
 		ret = PTR_ERR(data->phy);
 		/* Return -EINVAL if no usbphy is available */
 		if (ret == -ENODEV)
 			ret = -EINVAL;
 		goto err_clk;
 	}

 	pdata.usb_phy = data->phy;
 	pdata.flags |= imx_platform_flag->flags;
 	if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
 		data->supports_runtime_pm = true;

 	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 	if (ret)
 		goto err_clk;

 	ret = imx_usbmisc_init(data->usbmisc_data);
 	if (ret) {
 		dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
 		goto err_clk;
 	}

 	data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
 				pdev->resource, pdev->num_resources,
 				&pdata);
 	if (IS_ERR(data->ci_pdev)) {
 		ret = PTR_ERR(data->ci_pdev);
 		dev_err(&pdev->dev,
 			"Can't register ci_hdrc platform device, err=%d\n",
 			ret);
 		goto err_clk;
 	}

 	ret = imx_usbmisc_init_post(data->usbmisc_data);
 	if (ret) {
 		dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
 		goto disable_device;
 	}

 	if (data->supports_runtime_pm) {
 		pm_runtime_set_active(&pdev->dev);
 		pm_runtime_enable(&pdev->dev);
 	}

 	device_set_wakeup_capable(&pdev->dev, true);

 	return 0;

 disable_device:
 	ci_hdrc_remove_device(data->ci_pdev);
 err_clk:
 	imx_disable_unprepare_clks(&pdev->dev);
 	return ret;
 }

 static int ci_hdrc_imx_remove(struct platform_device *pdev)
 {
 	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);

 	if (data->supports_runtime_pm) {
 		pm_runtime_get_sync(&pdev->dev);
 		pm_runtime_disable(&pdev->dev);
 		pm_runtime_put_noidle(&pdev->dev);
 	}
 	ci_hdrc_remove_device(data->ci_pdev);
 	imx_disable_unprepare_clks(&pdev->dev);

 	return 0;
 }

 #ifdef CONFIG_PM
 static int imx_controller_suspend(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	dev_dbg(dev, "at %s\n", __func__);

 	imx_disable_unprepare_clks(dev);
 	data->in_lpm = true;

 	return 0;
 }

 static int imx_controller_resume(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret = 0;

 	dev_dbg(dev, "at %s\n", __func__);

 	if (!data->in_lpm) {
 		WARN_ON(1);
 		return 0;
 	}

 	ret = imx_prepare_enable_clks(dev);
 	if (ret)
 		return ret;

 	data->in_lpm = false;

 	ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
 	if (ret) {
 		dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 		goto clk_disable;
 	}

 	return 0;

 clk_disable:
 	imx_disable_unprepare_clks(dev);
 	return ret;
 }

 #ifdef CONFIG_PM_SLEEP
 static int ci_hdrc_imx_suspend(struct device *dev)
 {
 	int ret;

 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

 	if (data->in_lpm)
 		/* The core's suspend doesn't run */
 		return 0;

 	if (device_may_wakeup(dev)) {
 		ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 		if (ret) {
 			dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
 					ret);
 			return ret;
 		}
 	}

 	return imx_controller_suspend(dev);
 }

 static int ci_hdrc_imx_resume(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret;

 	ret = imx_controller_resume(dev);
 	if (!ret && data->supports_runtime_pm) {
 		pm_runtime_disable(dev);
 		pm_runtime_set_active(dev);
 		pm_runtime_enable(dev);
 	}

 	return ret;
 }
 #endif /* CONFIG_PM_SLEEP */

 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
 {
 	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
 	int ret;

 	if (data->in_lpm) {
 		WARN_ON(1);
 		return 0;
 	}

 	ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
 	if (ret) {
 		dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
 		return ret;
 	}

 	return imx_controller_suspend(dev);
 }

 static int ci_hdrc_imx_runtime_resume(struct device *dev)
 {
 	return imx_controller_resume(dev);
 }

 #endif /* CONFIG_PM */

 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
 	SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
 	SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
 			ci_hdrc_imx_runtime_resume, NULL)
 };
 static struct platform_driver ci_hdrc_imx_driver = {
 	.probe = ci_hdrc_imx_probe,
 	.remove = ci_hdrc_imx_remove,
 	.driver = {
 		.name = "imx_usb",
 		.of_match_table = ci_hdrc_imx_dt_ids,
 		.pm = &ci_hdrc_imx_pm_ops,
 	 },
 };

 module_platform_driver(ci_hdrc_imx_driver);

 MODULE_ALIAS("platform:imx-usb");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
	/*
	* Copyright 2012 Freescale Semiconductor, Inc.
	* Copyright (C) 2012 Marek Vasut <marex@denx.de>
	* on behalf of DENX Software Engineering GmbH
	*
	* The code contained herein is licensed under the GNU General Public
	* License. You may obtain a copy of the GNU General Public License
	* Version 2 or later at the following locations:
	*
	* http://www.opensource.org/licenses/gpl-license.html
	* http://www.gnu.org/copyleft/gpl.html
	*/

	#include <linux/module.h>
	#include <linux/of_platform.h>
	#include <linux/of_gpio.h>
	#include <linux/platform_device.h>
	#include <linux/pm_runtime.h>
	#include <linux/dma-mapping.h>
	#include <linux/usb/chipidea.h>
	#include <linux/clk.h>

	#include "ci.h"
	#include "ci_hdrc_imx.h"

	struct ci_hdrc_imx_platform_flag {
	unsigned int flags;
	bool runtime_pm;
	};

	static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
	.flags = CI_HDRC_IMX28_WRITE_FIX \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_HOST_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON \|
	CI_HDRC_DISABLE_HOST_STREAMING,
	};

	static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM \|
	CI_HDRC_TURN_VBUS_EARLY_ON,
	};

	static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
	.flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
	};

	static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
	{ .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
	{ .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
	{ .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
	{ .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
	{ .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
	{ .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
	{ .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);

	struct ci_hdrc_imx_data {
	struct usb_phy *phy;
	struct platform_device *ci_pdev;
	struct clk *clk;
	struct imx_usbmisc_data *usbmisc_data;
	bool supports_runtime_pm;
	bool in_lpm;
	/* SoC before i.mx6 (except imx23/imx28) needs three clks */
	bool need_three_clks;
	struct clk *clk_ipg;
	struct clk *clk_ahb;
	struct clk *clk_per;
	/* --------------------------------- */
	};

	/* Common functions shared by usbmisc drivers */

	static struct imx_usbmisc_data usbmisc_get_init_data(struct device dev)
	{
	struct platform_device *misc_pdev;
	struct device_node *np = dev->of_node;
	struct of_phandle_args args;
	struct imx_usbmisc_data *data;
	int ret;

	/*
	* In case the fsl,usbmisc property is not present this device doesn't
	* need usbmisc. Return NULL (which is no error here)
	*/
	if (!of_get_property(np, "fsl,usbmisc", NULL))
	return NULL;

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

	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
	0, &args);
	if (ret) {
	dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
	ret);
	return ERR_PTR(ret);
	}

	data->index = args.args[0];

	misc_pdev = of_find_device_by_node(args.np);
	of_node_put(args.np);

	if (!misc_pdev \|\| !platform_get_drvdata(misc_pdev))
	return ERR_PTR(-EPROBE_DEFER);

	data->dev = &misc_pdev->dev;

	if (of_find_property(np, "disable-over-current", NULL))
	data->disable_oc = 1;

	if (of_find_property(np, "external-vbus-divider", NULL))
	data->evdo = 1;

	return data;
	}

	/* End of common functions shared by usbmisc drivers*/
	static int imx_get_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	data->clk_ipg = devm_clk_get(dev, "ipg");
	if (IS_ERR(data->clk_ipg)) {
	/* If the platform only needs one clocks */
	data->clk = devm_clk_get(dev, NULL);
	if (IS_ERR(data->clk)) {
	ret = PTR_ERR(data->clk);
	dev_err(dev,
	"Failed to get clks, err=%ld,%ld\n",
	PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
	return ret;
	}
	return ret;
	}

	data->clk_ahb = devm_clk_get(dev, "ahb");
	if (IS_ERR(data->clk_ahb)) {
	ret = PTR_ERR(data->clk_ahb);
	dev_err(dev,
	"Failed to get ahb clock, err=%d\n", ret);
	return ret;
	}

	data->clk_per = devm_clk_get(dev, "per");
	if (IS_ERR(data->clk_per)) {
	ret = PTR_ERR(data->clk_per);
	dev_err(dev,
	"Failed to get per clock, err=%d\n", ret);
	return ret;
	}

	data->need_three_clks = true;
	return ret;
	}

	static int imx_prepare_enable_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	if (data->need_three_clks) {
	ret = clk_prepare_enable(data->clk_ipg);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable ipg clk, err=%d\n",
	ret);
	return ret;
	}

	ret = clk_prepare_enable(data->clk_ahb);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable ahb clk, err=%d\n",
	ret);
	clk_disable_unprepare(data->clk_ipg);
	return ret;
	}

	ret = clk_prepare_enable(data->clk_per);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable per clk, err=%d\n",
	ret);
	clk_disable_unprepare(data->clk_ahb);
	clk_disable_unprepare(data->clk_ipg);
	return ret;
	}
	} else {
	ret = clk_prepare_enable(data->clk);
	if (ret) {
	dev_err(dev,
	"Failed to prepare/enable clk, err=%d\n",
	ret);
	return ret;
	}
	}

	return ret;
	}

	static void imx_disable_unprepare_clks(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	if (data->need_three_clks) {
	clk_disable_unprepare(data->clk_per);
	clk_disable_unprepare(data->clk_ahb);
	clk_disable_unprepare(data->clk_ipg);
	} else {
	clk_disable_unprepare(data->clk);
	}
	}

	static int ci_hdrc_imx_probe(struct platform_device *pdev)
	{
	struct ci_hdrc_imx_data *data;
	struct ci_hdrc_platform_data pdata = {
	.name = dev_name(&pdev->dev),
	.capoffset = DEF_CAPOFFSET,
	.flags = CI_HDRC_SET_NON_ZERO_TTHA,
	};
	int ret;
	const struct of_device_id *of_id;
	const struct ci_hdrc_imx_platform_flag *imx_platform_flag;

	of_id = of_match_device(ci_hdrc_imx_dt_ids, &pdev->dev);
	if (!of_id)
	return -ENODEV;

	imx_platform_flag = of_id->data;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data)
	return -ENOMEM;

	platform_set_drvdata(pdev, data);
	data->usbmisc_data = usbmisc_get_init_data(&pdev->dev);
	if (IS_ERR(data->usbmisc_data))
	return PTR_ERR(data->usbmisc_data);

	ret = imx_get_clks(&pdev->dev);
	if (ret)
	return ret;

	ret = imx_prepare_enable_clks(&pdev->dev);
	if (ret)
	return ret;

	data->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
	if (IS_ERR(data->phy)) {
	ret = PTR_ERR(data->phy);
	/* Return -EINVAL if no usbphy is available */
	if (ret == -ENODEV)
	ret = -EINVAL;
	goto err_clk;
	}

	pdata.usb_phy = data->phy;
	pdata.flags \|= imx_platform_flag->flags;
	if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
	data->supports_runtime_pm = true;

	ret = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
	if (ret)
	goto err_clk;

	ret = imx_usbmisc_init(data->usbmisc_data);
	if (ret) {
	dev_err(&pdev->dev, "usbmisc init failed, ret=%d\n", ret);
	goto err_clk;
	}

	data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
	pdev->resource, pdev->num_resources,
	&pdata);
	if (IS_ERR(data->ci_pdev)) {
	ret = PTR_ERR(data->ci_pdev);
	dev_err(&pdev->dev,
	"Can't register ci_hdrc platform device, err=%d\n",
	ret);
	goto err_clk;
	}

	ret = imx_usbmisc_init_post(data->usbmisc_data);
	if (ret) {
	dev_err(&pdev->dev, "usbmisc post failed, ret=%d\n", ret);
	goto disable_device;
	}

	if (data->supports_runtime_pm) {
	pm_runtime_set_active(&pdev->dev);
	pm_runtime_enable(&pdev->dev);
	}

	device_set_wakeup_capable(&pdev->dev, true);

	return 0;

	disable_device:
	ci_hdrc_remove_device(data->ci_pdev);
	err_clk:
	imx_disable_unprepare_clks(&pdev->dev);
	return ret;
	}

	static int ci_hdrc_imx_remove(struct platform_device *pdev)
	{
	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);

	if (data->supports_runtime_pm) {
	pm_runtime_get_sync(&pdev->dev);
	pm_runtime_disable(&pdev->dev);
	pm_runtime_put_noidle(&pdev->dev);
	}
	ci_hdrc_remove_device(data->ci_pdev);
	imx_disable_unprepare_clks(&pdev->dev);

	return 0;
	}

	#ifdef CONFIG_PM
	static int imx_controller_suspend(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	dev_dbg(dev, "at %s\n", __func__);

	imx_disable_unprepare_clks(dev);
	data->in_lpm = true;

	return 0;
	}

	static int imx_controller_resume(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret = 0;

	dev_dbg(dev, "at %s\n", __func__);

	if (!data->in_lpm) {
	WARN_ON(1);
	return 0;
	}

	ret = imx_prepare_enable_clks(dev);
	if (ret)
	return ret;

	data->in_lpm = false;

	ret = imx_usbmisc_set_wakeup(data->usbmisc_data, false);
	if (ret) {
	dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
	goto clk_disable;
	}

	return 0;

	clk_disable:
	imx_disable_unprepare_clks(dev);
	return ret;
	}

	#ifdef CONFIG_PM_SLEEP
	static int ci_hdrc_imx_suspend(struct device *dev)
	{
	int ret;

	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);

	if (data->in_lpm)
	/* The core's suspend doesn't run */
	return 0;

	if (device_may_wakeup(dev)) {
	ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
	if (ret) {
	dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n",
	ret);
	return ret;
	}
	}

	return imx_controller_suspend(dev);
	}

	static int ci_hdrc_imx_resume(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret;

	ret = imx_controller_resume(dev);
	if (!ret && data->supports_runtime_pm) {
	pm_runtime_disable(dev);
	pm_runtime_set_active(dev);
	pm_runtime_enable(dev);
	}

	return ret;
	}
	#endif /* CONFIG_PM_SLEEP */

	static int ci_hdrc_imx_runtime_suspend(struct device *dev)
	{
	struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
	int ret;

	if (data->in_lpm) {
	WARN_ON(1);
	return 0;
	}

	ret = imx_usbmisc_set_wakeup(data->usbmisc_data, true);
	if (ret) {
	dev_err(dev, "usbmisc set_wakeup failed, ret=%d\n", ret);
	return ret;
	}

	return imx_controller_suspend(dev);
	}

	static int ci_hdrc_imx_runtime_resume(struct device *dev)
	{
	return imx_controller_resume(dev);
	}

	#endif /* CONFIG_PM */

	static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
	SET_SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
	SET_RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend,
	ci_hdrc_imx_runtime_resume, NULL)
	};
	static struct platform_driver ci_hdrc_imx_driver = {
	.probe = ci_hdrc_imx_probe,
	.remove = ci_hdrc_imx_remove,
	.driver = {
	.name = "imx_usb",
	.of_match_table = ci_hdrc_imx_dt_ids,
	.pm = &ci_hdrc_imx_pm_ops,
	},
	};

	module_platform_driver(ci_hdrc_imx_driver);

	MODULE_ALIAS("platform:imx-usb");
	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");