drivers/usb/chipidea/ci13xxx_imx.c - kernel/msm-4.19 - Gitiles

 /*
  * 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 <linux/regulator/consumer.h>
 #include <linux/pinctrl/consumer.h>

 #include "ci.h"
 #include "ci13xxx_imx.h"

 #define pdev_to_phy(pdev) \
 	((struct usb_phy *)platform_get_drvdata(pdev))

 struct ci13xxx_imx_data {
 	struct device_node *phy_np;
 	struct usb_phy *phy;
 	struct platform_device *ci_pdev;
 	struct clk *clk;
 	struct regulator *reg_vbus;
 };

 static const struct usbmisc_ops *usbmisc_ops;

 /* Common functions shared by usbmisc drivers */

 int usbmisc_set_ops(const struct usbmisc_ops *ops)
 {
 	if (usbmisc_ops)
 		return -EBUSY;

 	usbmisc_ops = ops;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(usbmisc_set_ops);

 void usbmisc_unset_ops(const struct usbmisc_ops *ops)
 {
 	usbmisc_ops = NULL;
 }
 EXPORT_SYMBOL_GPL(usbmisc_unset_ops);

 int usbmisc_get_init_data(struct device *dev, struct usbmisc_usb_device *usbdev)
 {
 	struct device_node *np = dev->of_node;
 	struct of_phandle_args args;
 	int ret;

 	usbdev->dev = dev;

 	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);
 		memset(usbdev, 0, sizeof(*usbdev));
 		return ret;
 	}
 	usbdev->index = args.args[0];
 	of_node_put(args.np);

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

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

 	return 0;
 }
 EXPORT_SYMBOL_GPL(usbmisc_get_init_data);

 /* End of common functions shared by usbmisc drivers*/

 static struct ci13xxx_platform_data ci13xxx_imx_platdata  = {
 	.name			= "ci13xxx_imx",
 	.flags			= CI13XXX_REQUIRE_TRANSCEIVER |
 				  CI13XXX_PULLUP_ON_VBUS |
 				  CI13XXX_DISABLE_STREAMING,
 	.capoffset		= DEF_CAPOFFSET,
 };

 static int ci13xxx_imx_probe(struct platform_device *pdev)
 {
 	struct ci13xxx_imx_data *data;
 	struct platform_device *plat_ci, *phy_pdev;
 	struct device_node *phy_np;
 	struct resource *res;
 	struct regulator *reg_vbus;
 	struct pinctrl *pinctrl;
 	int ret;

 	if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL)
 		&& !usbmisc_ops)
 		return -EPROBE_DEFER;

 	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
 	if (!data) {
 		dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n");
 		return -ENOMEM;
 	}

 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
 		dev_err(&pdev->dev, "Can't get device resources!\n");
 		return -ENOENT;
 	}

 	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
 	if (IS_ERR(pinctrl))
 		dev_warn(&pdev->dev, "pinctrl get/select failed, err=%ld\n",
 			PTR_ERR(pinctrl));

 	data->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(data->clk)) {
 		dev_err(&pdev->dev,
 			"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
 		return PTR_ERR(data->clk);
 	}

 	ret = clk_prepare_enable(data->clk);
 	if (ret) {
 		dev_err(&pdev->dev,
 			"Failed to prepare or enable clock, err=%d\n", ret);
 		return ret;
 	}

 	phy_np = of_parse_phandle(pdev->dev.of_node, "fsl,usbphy", 0);
 	if (phy_np) {
 		data->phy_np = phy_np;
 		phy_pdev = of_find_device_by_node(phy_np);
 		if (phy_pdev) {
 			struct usb_phy *phy;
 			phy = pdev_to_phy(phy_pdev);
 			if (phy &&
 			    try_module_get(phy_pdev->dev.driver->owner)) {
 				usb_phy_init(phy);
 				data->phy = phy;
 			}
 		}
 	}

 	/* we only support host now, so enable vbus here */
 	reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
 	if (!IS_ERR(reg_vbus)) {
 		ret = regulator_enable(reg_vbus);
 		if (ret) {
 			dev_err(&pdev->dev,
 				"Failed to enable vbus regulator, err=%d\n",
 				ret);
 			goto put_np;
 		}
 		data->reg_vbus = reg_vbus;
 	} else {
 		reg_vbus = NULL;
 	}

 	ci13xxx_imx_platdata.phy = data->phy;

 	if (!pdev->dev.dma_mask) {
 		pdev->dev.dma_mask = devm_kzalloc(&pdev->dev,
 				      sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
 		if (!pdev->dev.dma_mask) {
 			ret = -ENOMEM;
 			dev_err(&pdev->dev, "Failed to alloc dma_mask!\n");
 			goto err;
 		}
 		*pdev->dev.dma_mask = DMA_BIT_MASK(32);
 		dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask);
 	}

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

 	plat_ci = ci13xxx_add_device(&pdev->dev,
 				pdev->resource, pdev->num_resources,
 				&ci13xxx_imx_platdata);
 	if (IS_ERR(plat_ci)) {
 		ret = PTR_ERR(plat_ci);
 		dev_err(&pdev->dev,
 			"Can't register ci_hdrc platform device, err=%d\n",
 			ret);
 		goto err;
 	}

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

 	data->ci_pdev = plat_ci;
 	platform_set_drvdata(pdev, data);

 	pm_runtime_no_callbacks(&pdev->dev);
 	pm_runtime_enable(&pdev->dev);

 	return 0;

 err:
 	if (reg_vbus)
 		regulator_disable(reg_vbus);
 put_np:
 	if (phy_np)
 		of_node_put(phy_np);
 	clk_disable_unprepare(data->clk);
 	return ret;
 }

 static int ci13xxx_imx_remove(struct platform_device *pdev)
 {
 	struct ci13xxx_imx_data *data = platform_get_drvdata(pdev);

 	pm_runtime_disable(&pdev->dev);
 	ci13xxx_remove_device(data->ci_pdev);

 	if (data->reg_vbus)
 		regulator_disable(data->reg_vbus);

 	if (data->phy) {
 		usb_phy_shutdown(data->phy);
 		module_put(data->phy->dev->driver->owner);
 	}

 	of_node_put(data->phy_np);

 	clk_disable_unprepare(data->clk);

 	platform_set_drvdata(pdev, NULL);

 	return 0;
 }

 static const struct of_device_id ci13xxx_imx_dt_ids[] = {
 	{ .compatible = "fsl,imx27-usb", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ci13xxx_imx_dt_ids);

 static struct platform_driver ci13xxx_imx_driver = {
 	.probe = ci13xxx_imx_probe,
 	.remove = ci13xxx_imx_remove,
 	.driver = {
 		.name = "imx_usb",
 		.owner = THIS_MODULE,
 		.of_match_table = ci13xxx_imx_dt_ids,
 	 },
 };

 module_platform_driver(ci13xxx_imx_driver);

 MODULE_ALIAS("platform:imx-usb");
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("CI13xxx 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 <linux/regulator/consumer.h>
	#include <linux/pinctrl/consumer.h>

	#include "ci.h"
	#include "ci13xxx_imx.h"

	#define pdev_to_phy(pdev) \
	((struct usb_phy *)platform_get_drvdata(pdev))

	struct ci13xxx_imx_data {
	struct device_node *phy_np;
	struct usb_phy *phy;
	struct platform_device *ci_pdev;
	struct clk *clk;
	struct regulator *reg_vbus;
	};

	static const struct usbmisc_ops *usbmisc_ops;

	/* Common functions shared by usbmisc drivers */

	int usbmisc_set_ops(const struct usbmisc_ops *ops)
	{
	if (usbmisc_ops)
	return -EBUSY;

	usbmisc_ops = ops;

	return 0;
	}
	EXPORT_SYMBOL_GPL(usbmisc_set_ops);

	void usbmisc_unset_ops(const struct usbmisc_ops *ops)
	{
	usbmisc_ops = NULL;
	}
	EXPORT_SYMBOL_GPL(usbmisc_unset_ops);

	int usbmisc_get_init_data(struct device dev, struct usbmisc_usb_device usbdev)
	{
	struct device_node *np = dev->of_node;
	struct of_phandle_args args;
	int ret;

	usbdev->dev = dev;

	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);
	memset(usbdev, 0, sizeof(*usbdev));
	return ret;
	}
	usbdev->index = args.args[0];
	of_node_put(args.np);

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

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

	return 0;
	}
	EXPORT_SYMBOL_GPL(usbmisc_get_init_data);

	/* End of common functions shared by usbmisc drivers*/

	static struct ci13xxx_platform_data ci13xxx_imx_platdata = {
	.name = "ci13xxx_imx",
	.flags = CI13XXX_REQUIRE_TRANSCEIVER \|
	CI13XXX_PULLUP_ON_VBUS \|
	CI13XXX_DISABLE_STREAMING,
	.capoffset = DEF_CAPOFFSET,
	};

	static int ci13xxx_imx_probe(struct platform_device *pdev)
	{
	struct ci13xxx_imx_data *data;
	struct platform_device plat_ci, phy_pdev;
	struct device_node *phy_np;
	struct resource *res;
	struct regulator *reg_vbus;
	struct pinctrl *pinctrl;
	int ret;

	if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL)
	&& !usbmisc_ops)
	return -EPROBE_DEFER;

	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
	if (!data) {
	dev_err(&pdev->dev, "Failed to allocate CI13xxx-IMX data!\n");
	return -ENOMEM;
	}

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!res) {
	dev_err(&pdev->dev, "Can't get device resources!\n");
	return -ENOENT;
	}

	pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
	if (IS_ERR(pinctrl))
	dev_warn(&pdev->dev, "pinctrl get/select failed, err=%ld\n",
	PTR_ERR(pinctrl));

	data->clk = devm_clk_get(&pdev->dev, NULL);
	if (IS_ERR(data->clk)) {
	dev_err(&pdev->dev,
	"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
	return PTR_ERR(data->clk);
	}

	ret = clk_prepare_enable(data->clk);
	if (ret) {
	dev_err(&pdev->dev,
	"Failed to prepare or enable clock, err=%d\n", ret);
	return ret;
	}

	phy_np = of_parse_phandle(pdev->dev.of_node, "fsl,usbphy", 0);
	if (phy_np) {
	data->phy_np = phy_np;
	phy_pdev = of_find_device_by_node(phy_np);
	if (phy_pdev) {
	struct usb_phy *phy;
	phy = pdev_to_phy(phy_pdev);
	if (phy &&
	try_module_get(phy_pdev->dev.driver->owner)) {
	usb_phy_init(phy);
	data->phy = phy;
	}
	}
	}

	/* we only support host now, so enable vbus here */
	reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
	if (!IS_ERR(reg_vbus)) {
	ret = regulator_enable(reg_vbus);
	if (ret) {
	dev_err(&pdev->dev,
	"Failed to enable vbus regulator, err=%d\n",
	ret);
	goto put_np;
	}
	data->reg_vbus = reg_vbus;
	} else {
	reg_vbus = NULL;
	}

	ci13xxx_imx_platdata.phy = data->phy;

	if (!pdev->dev.dma_mask) {
	pdev->dev.dma_mask = devm_kzalloc(&pdev->dev,
	sizeof(*pdev->dev.dma_mask), GFP_KERNEL);
	if (!pdev->dev.dma_mask) {
	ret = -ENOMEM;
	dev_err(&pdev->dev, "Failed to alloc dma_mask!\n");
	goto err;
	}
	*pdev->dev.dma_mask = DMA_BIT_MASK(32);
	dma_set_coherent_mask(&pdev->dev, *pdev->dev.dma_mask);
	}

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

	plat_ci = ci13xxx_add_device(&pdev->dev,
	pdev->resource, pdev->num_resources,
	&ci13xxx_imx_platdata);
	if (IS_ERR(plat_ci)) {
	ret = PTR_ERR(plat_ci);
	dev_err(&pdev->dev,
	"Can't register ci_hdrc platform device, err=%d\n",
	ret);
	goto err;
	}

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

	data->ci_pdev = plat_ci;
	platform_set_drvdata(pdev, data);

	pm_runtime_no_callbacks(&pdev->dev);
	pm_runtime_enable(&pdev->dev);

	return 0;

	err:
	if (reg_vbus)
	regulator_disable(reg_vbus);
	put_np:
	if (phy_np)
	of_node_put(phy_np);
	clk_disable_unprepare(data->clk);
	return ret;
	}

	static int ci13xxx_imx_remove(struct platform_device *pdev)
	{
	struct ci13xxx_imx_data *data = platform_get_drvdata(pdev);

	pm_runtime_disable(&pdev->dev);
	ci13xxx_remove_device(data->ci_pdev);

	if (data->reg_vbus)
	regulator_disable(data->reg_vbus);

	if (data->phy) {
	usb_phy_shutdown(data->phy);
	module_put(data->phy->dev->driver->owner);
	}

	of_node_put(data->phy_np);

	clk_disable_unprepare(data->clk);

	platform_set_drvdata(pdev, NULL);

	return 0;
	}

	static const struct of_device_id ci13xxx_imx_dt_ids[] = {
	{ .compatible = "fsl,imx27-usb", },
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(of, ci13xxx_imx_dt_ids);

	static struct platform_driver ci13xxx_imx_driver = {
	.probe = ci13xxx_imx_probe,
	.remove = ci13xxx_imx_remove,
	.driver = {
	.name = "imx_usb",
	.owner = THIS_MODULE,
	.of_match_table = ci13xxx_imx_dt_ids,
	},
	};

	module_platform_driver(ci13xxx_imx_driver);

	MODULE_ALIAS("platform:imx-usb");
	MODULE_LICENSE("GPL v2");
	MODULE_DESCRIPTION("CI13xxx i.MX USB binding");
	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");