[mirror_ubuntu-bionic-kernel.git] / drivers / usb / chipidea / ci_hdrc_imx.c

/*
 * 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 "ci.h"
#include "ci_hdrc_imx.h"

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

struct ci_hdrc_imx_data {
	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 int ci_hdrc_imx_probe(struct platform_device *pdev)
{
	struct ci_hdrc_imx_data *data;
	struct ci_hdrc_platform_data pdata = {
		.name		= "ci_hdrc_imx",
		.capoffset	= DEF_CAPOFFSET,
		.flags		= CI_HDRC_REQUIRE_TRANSCEIVER |
				  CI_HDRC_PULLUP_ON_VBUS |
				  CI_HDRC_DISABLE_STREAMING,
	};
	struct resource *res;
	int ret;
	struct usb_phy *phy;

	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 ci_hdrc-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;
	}

	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 = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
	if (!IS_ERR(phy)) {
		ret = usb_phy_init(phy);
		if (ret) {
			dev_err(&pdev->dev, "unable to init phy: %d\n", ret);
			goto err_clk;
		}
	} else if (PTR_ERR(phy) == -EPROBE_DEFER) {
		ret = -EPROBE_DEFER;
		goto err_clk;
	}

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

	pdata.phy = data->phy;

	if (!pdev->dev.dma_mask)
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	if (!pdev->dev.coherent_dma_mask)
		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);

	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;
		}
	}

	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;
	}

	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 disable_device;
		}
	}

	platform_set_drvdata(pdev, data);

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

	return 0;

disable_device:
	ci_hdrc_remove_device(data->ci_pdev);
err:
	if (data->reg_vbus)
		regulator_disable(data->reg_vbus);
err_clk:
	clk_disable_unprepare(data->clk);
	return ret;
}

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

	pm_runtime_disable(&pdev->dev);
	ci_hdrc_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);
	}

	clk_disable_unprepare(data->clk);

	return 0;
}

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

static struct platform_driver ci_hdrc_imx_driver = {
	.probe = ci_hdrc_imx_probe,
	.remove = ci_hdrc_imx_remove,
	.driver = {
		.name = "imx_usb",
		.owner = THIS_MODULE,
		.of_match_table = ci_hdrc_imx_dt_ids,
	 },
};

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>");
Commit	Line	Data
15302800 RZ	1	/*
	2	* Copyright 2012 Freescale Semiconductor, Inc.
	3	* Copyright (C) 2012 Marek Vasut <marex@denx.de>
	4	* on behalf of DENX Software Engineering GmbH
	5	*
	6	* The code contained herein is licensed under the GNU General Public
	7	* License. You may obtain a copy of the GNU General Public License
	8	* Version 2 or later at the following locations:
	9	*
	10	* http://www.opensource.org/licenses/gpl-license.html
	11	* http://www.gnu.org/copyleft/gpl.html
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/of_platform.h>
	16	#include <linux/of_gpio.h>
	17	#include <linux/platform_device.h>
	18	#include <linux/pm_runtime.h>
	19	#include <linux/dma-mapping.h>
	20	#include <linux/usb/chipidea.h>
	21	#include <linux/clk.h>
	22	#include <linux/regulator/consumer.h>
	23
	24	#include "ci.h"
8e22978c	25	#include "ci_hdrc_imx.h"
15302800 RZ	26
	27	#define pdev_to_phy(pdev) \
	28	((struct usb_phy *)platform_get_drvdata(pdev))
	29
8e22978c	30	struct ci_hdrc_imx_data {
15302800 RZ	31	struct usb_phy *phy;
	32	struct platform_device *ci_pdev;
	33	struct clk *clk;
	34	struct regulator *reg_vbus;
	35	};
	36
d142d6be RZ	37	static const struct usbmisc_ops *usbmisc_ops;
	38
	39	/* Common functions shared by usbmisc drivers */
	40
	41	int usbmisc_set_ops(const struct usbmisc_ops *ops)
	42	{
	43	if (usbmisc_ops)
	44	return -EBUSY;
	45
	46	usbmisc_ops = ops;
	47
	48	return 0;
	49	}
	50	EXPORT_SYMBOL_GPL(usbmisc_set_ops);
	51
	52	void usbmisc_unset_ops(const struct usbmisc_ops *ops)
	53	{
	54	usbmisc_ops = NULL;
	55	}
	56	EXPORT_SYMBOL_GPL(usbmisc_unset_ops);
	57
	58	int usbmisc_get_init_data(struct device dev, struct usbmisc_usb_device usbdev)
	59	{
	60	struct device_node *np = dev->of_node;
	61	struct of_phandle_args args;
	62	int ret;
	63
	64	usbdev->dev = dev;
	65
	66	ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
	67	0, &args);
	68	if (ret) {
	69	dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
	70	ret);
	71	memset(usbdev, 0, sizeof(*usbdev));
	72	return ret;
	73	}
	74	usbdev->index = args.args[0];
	75	of_node_put(args.np);
	76
	77	if (of_find_property(np, "disable-over-current", NULL))
	78	usbdev->disable_oc = 1;
	79
a0685330 MG	80	if (of_find_property(np, "external-vbus-divider", NULL))
	81	usbdev->evdo = 1;
	82
d142d6be RZ	83	return 0;
	84	}
	85	EXPORT_SYMBOL_GPL(usbmisc_get_init_data);
	86
	87	/* End of common functions shared by usbmisc drivers*/
	88
8e22978c	89	static int ci_hdrc_imx_probe(struct platform_device *pdev)
15302800	90	{
8e22978c AS	91	struct ci_hdrc_imx_data *data;
	92	struct ci_hdrc_platform_data pdata = {
	93	.name = "ci_hdrc_imx",
f6a3b3a3	94	.capoffset = DEF_CAPOFFSET,
8e22978c AS	95	.flags = CI_HDRC_REQUIRE_TRANSCEIVER \|
	96	CI_HDRC_PULLUP_ON_VBUS \|
	97	CI_HDRC_DISABLE_STREAMING,
f6a3b3a3	98	};
15302800	99	struct resource *res;
15302800	100	int ret;
ea1418b5	101	struct usb_phy *phy;
15302800	102
d142d6be RZ	103	if (of_find_property(pdev->dev.of_node, "fsl,usbmisc", NULL)
	104	&& !usbmisc_ops)
	105	return -EPROBE_DEFER;
	106
15302800 RZ	107	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
15302800 RZ	108	if (!data) {
8e22978c	109	dev_err(&pdev->dev, "Failed to allocate ci_hdrc-imx data!\n");
15302800 RZ	110	return -ENOMEM;
	111	}
	112
	113	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	114	if (!res) {
	115	dev_err(&pdev->dev, "Can't get device resources!\n");
	116	return -ENOENT;
	117	}
	118
	119	data->clk = devm_clk_get(&pdev->dev, NULL);
	120	if (IS_ERR(data->clk)) {
	121	dev_err(&pdev->dev,
	122	"Failed to get clock, err=%ld\n", PTR_ERR(data->clk));
	123	return PTR_ERR(data->clk);
	124	}
	125
	126	ret = clk_prepare_enable(data->clk);
	127	if (ret) {
	128	dev_err(&pdev->dev,
	129	"Failed to prepare or enable clock, err=%d\n", ret);
	130	return ret;
	131	}
	132
ea1418b5 SH	133	phy = devm_usb_get_phy_by_phandle(&pdev->dev, "fsl,usbphy", 0);
	134	if (!IS_ERR(phy)) {
	135	ret = usb_phy_init(phy);
	136	if (ret) {
	137	dev_err(&pdev->dev, "unable to init phy: %d\n", ret);
	138	goto err_clk;
15302800	139	}
ea1418b5 SH	140	} else if (PTR_ERR(phy) == -EPROBE_DEFER) {
	141	ret = -EPROBE_DEFER;
	142	goto err_clk;
15302800 RZ	143	}
	144
	145	/* we only support host now, so enable vbus here */
e56ae54f FE	146	data->reg_vbus = devm_regulator_get(&pdev->dev, "vbus");
	147	if (!IS_ERR(data->reg_vbus)) {
	148	ret = regulator_enable(data->reg_vbus);
15302800 RZ	149	if (ret) {
	150	dev_err(&pdev->dev,
	151	"Failed to enable vbus regulator, err=%d\n",
	152	ret);
ea1418b5	153	goto err_clk;
15302800	154	}
15302800	155	} else {
e56ae54f	156	data->reg_vbus = NULL;
15302800 RZ	157	}
15302800 RZ	158
f6a3b3a3	159	pdata.phy = data->phy;
15302800	160
3b9561e9 SW	161	if (!pdev->dev.dma_mask)
	162	pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
	163	if (!pdev->dev.coherent_dma_mask)
	164	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
d142d6be RZ	165
	166	if (usbmisc_ops && usbmisc_ops->init) {
	167	ret = usbmisc_ops->init(&pdev->dev);
	168	if (ret) {
	169	dev_err(&pdev->dev,
	170	"usbmisc init failed, ret=%d\n", ret);
	171	goto err;
	172	}
	173	}
	174
8e22978c	175	data->ci_pdev = ci_hdrc_add_device(&pdev->dev,
15302800	176	pdev->resource, pdev->num_resources,
f6a3b3a3	177	&pdata);
770719df FE	178	if (IS_ERR(data->ci_pdev)) {
770719df FE	179	ret = PTR_ERR(data->ci_pdev);
15302800 RZ	180	dev_err(&pdev->dev,
	181	"Can't register ci_hdrc platform device, err=%d\n",
	182	ret);
	183	goto err;
	184	}
	185
a0685330 MG	186	if (usbmisc_ops && usbmisc_ops->post) {
	187	ret = usbmisc_ops->post(&pdev->dev);
	188	if (ret) {
	189	dev_err(&pdev->dev,
	190	"usbmisc post failed, ret=%d\n", ret);
770719df	191	goto disable_device;
a0685330 MG	192	}
	193	}
	194
15302800 RZ	195	platform_set_drvdata(pdev, data);
	196
	197	pm_runtime_no_callbacks(&pdev->dev);
	198	pm_runtime_enable(&pdev->dev);
	199
	200	return 0;
	201
770719df	202	disable_device:
8e22978c	203	ci_hdrc_remove_device(data->ci_pdev);
15302800	204	err:
e56ae54f FE	205	if (data->reg_vbus)
e56ae54f FE	206	regulator_disable(data->reg_vbus);
ea1418b5	207	err_clk:
15302800 RZ	208	clk_disable_unprepare(data->clk);
	209	return ret;
	210	}
	211
8e22978c	212	static int ci_hdrc_imx_remove(struct platform_device *pdev)
15302800	213	{
8e22978c	214	struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
15302800 RZ	215
15302800 RZ	216	pm_runtime_disable(&pdev->dev);
8e22978c	217	ci_hdrc_remove_device(data->ci_pdev);
15302800 RZ	218
	219	if (data->reg_vbus)
	220	regulator_disable(data->reg_vbus);
	221
	222	if (data->phy) {
	223	usb_phy_shutdown(data->phy);
	224	module_put(data->phy->dev->driver->owner);
	225	}
	226
15302800 RZ	227	clk_disable_unprepare(data->clk);
15302800 RZ	228
15302800 RZ	229	return 0;
	230	}
	231
8e22978c	232	static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
15302800 RZ	233	{ .compatible = "fsl,imx27-usb", },
	234	{ /* sentinel */ }
	235	};
8e22978c	236	MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
15302800	237
8e22978c AS	238	static struct platform_driver ci_hdrc_imx_driver = {
	239	.probe = ci_hdrc_imx_probe,
	240	.remove = ci_hdrc_imx_remove,
15302800 RZ	241	.driver = {
	242	.name = "imx_usb",
	243	.owner = THIS_MODULE,
8e22978c	244	.of_match_table = ci_hdrc_imx_dt_ids,
15302800 RZ	245	},
	246	};
	247
8e22978c	248	module_platform_driver(ci_hdrc_imx_driver);
15302800 RZ	249
	250	MODULE_ALIAS("platform:imx-usb");
	251	MODULE_LICENSE("GPL v2");
8e22978c	252	MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
15302800 RZ	253	MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
15302800 RZ	254	MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");