[deliverable/linux.git] / drivers / usb / misc / usb3503.c

/*
 * Driver for SMSC USB3503 USB 2.0 hub controller driver
 *
 * Copyright (c) 2012-2013 Dongjin Kim (tobetter@gmail.com)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of_gpio.h>
#include <linux/platform_device.h>
#include <linux/platform_data/usb3503.h>
#include <linux/regmap.h>

#define USB3503_VIDL		0x00
#define USB3503_VIDM		0x01
#define USB3503_PIDL		0x02
#define USB3503_PIDM		0x03
#define USB3503_DIDL		0x04
#define USB3503_DIDM		0x05

#define USB3503_CFG1		0x06
#define USB3503_SELF_BUS_PWR	(1 << 7)

#define USB3503_CFG2		0x07
#define USB3503_CFG3		0x08
#define USB3503_NRD		0x09

#define USB3503_PDS		0x0a

#define USB3503_SP_ILOCK	0xe7
#define USB3503_SPILOCK_CONNECT	(1 << 1)
#define USB3503_SPILOCK_CONFIG	(1 << 0)

#define USB3503_CFGP		0xee
#define USB3503_CLKSUSP		(1 << 7)

#define USB3503_RESET		0xff

struct usb3503 {
	enum usb3503_mode	mode;
	struct regmap		*regmap;
	struct device		*dev;
	u8	port_off_mask;
	int	gpio_intn;
	int	gpio_reset;
	int	gpio_connect;
};

static int usb3503_reset(struct usb3503 *hub, int state)
{
	if (!state && gpio_is_valid(hub->gpio_connect))
		gpio_set_value_cansleep(hub->gpio_connect, 0);

	if (gpio_is_valid(hub->gpio_reset))
		gpio_set_value_cansleep(hub->gpio_reset, state);

	/* Wait T_HUBINIT == 4ms for hub logic to stabilize */
	if (state)
		usleep_range(4000, 10000);

	return 0;
}

static int usb3503_connect(struct usb3503 *hub)
{
	struct device *dev = hub->dev;
	int err;

	usb3503_reset(hub, 1);

	if (hub->regmap) {
		/* SP_ILOCK: set connect_n, config_n for config */
		err = regmap_write(hub->regmap, USB3503_SP_ILOCK,
			   (USB3503_SPILOCK_CONNECT
				 | USB3503_SPILOCK_CONFIG));
		if (err < 0) {
			dev_err(dev, "SP_ILOCK failed (%d)\n", err);
			return err;
		}

		/* PDS : Disable For Self Powered Operation */
		if (hub->port_off_mask) {
			err = regmap_update_bits(hub->regmap, USB3503_PDS,
					hub->port_off_mask,
					hub->port_off_mask);
			if (err < 0) {
				dev_err(dev, "PDS failed (%d)\n", err);
				return err;
			}
		}

		/* CFG1 : SELF_BUS_PWR -> Self-Powerd operation */
		err = regmap_update_bits(hub->regmap, USB3503_CFG1,
					 USB3503_SELF_BUS_PWR,
					 USB3503_SELF_BUS_PWR);
		if (err < 0) {
			dev_err(dev, "CFG1 failed (%d)\n", err);
			return err;
		}

		/* SP_LOCK: clear connect_n, config_n for hub connect */
		err = regmap_update_bits(hub->regmap, USB3503_SP_ILOCK,
					 (USB3503_SPILOCK_CONNECT
					  | USB3503_SPILOCK_CONFIG), 0);
		if (err < 0) {
			dev_err(dev, "SP_ILOCK failed (%d)\n", err);
			return err;
		}
	}

	if (gpio_is_valid(hub->gpio_connect))
		gpio_set_value_cansleep(hub->gpio_connect, 1);

	hub->mode = USB3503_MODE_HUB;
	dev_info(dev, "switched to HUB mode\n");

	return 0;
}

static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode)
{
	struct device *dev = hub->dev;
	int err = 0;

	switch (mode) {
	case USB3503_MODE_HUB:
		err = usb3503_connect(hub);
		break;

	case USB3503_MODE_STANDBY:
		usb3503_reset(hub, 0);

		hub->mode = mode;
		dev_info(dev, "switched to STANDBY mode\n");
		break;

	default:
		dev_err(dev, "unknown mode is requested\n");
		err = -EINVAL;
		break;
	}

	return err;
}

static const struct regmap_config usb3503_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = USB3503_RESET,
};

static int usb3503_probe(struct usb3503 *hub)
{
	struct device *dev = hub->dev;
	struct usb3503_platform_data *pdata = dev_get_platdata(dev);
	struct device_node *np = dev->of_node;
	int err;
	u32 mode = USB3503_MODE_HUB;
	const u32 *property;
	int len;

	if (pdata) {
		hub->port_off_mask	= pdata->port_off_mask;
		hub->gpio_intn		= pdata->gpio_intn;
		hub->gpio_connect	= pdata->gpio_connect;
		hub->gpio_reset		= pdata->gpio_reset;
		hub->mode		= pdata->initial_mode;
	} else if (np) {
		hub->port_off_mask = 0;

		property = of_get_property(np, "disabled-ports", &len);
		if (property && (len / sizeof(u32)) > 0) {
			int i;
			for (i = 0; i < len / sizeof(u32); i++) {
				u32 port = be32_to_cpu(property[i]);
				if ((1 <= port) && (port <= 3))
					hub->port_off_mask |= (1 << port);
			}
		}

		hub->gpio_intn	= of_get_named_gpio(np, "intn-gpios", 0);
		if (hub->gpio_intn == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		hub->gpio_connect = of_get_named_gpio(np, "connect-gpios", 0);
		if (hub->gpio_connect == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
		if (hub->gpio_reset == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		of_property_read_u32(np, "initial-mode", &mode);
		hub->mode = mode;
	}

	if (hub->port_off_mask && !hub->regmap)
		dev_err(dev, "Ports disabled with no control interface\n");

	if (gpio_is_valid(hub->gpio_intn)) {
		err = devm_gpio_request_one(dev, hub->gpio_intn,
				GPIOF_OUT_INIT_HIGH, "usb3503 intn");
		if (err) {
			dev_err(dev,
				"unable to request GPIO %d as connect pin (%d)\n",
				hub->gpio_intn, err);
			return err;
		}
	}

	if (gpio_is_valid(hub->gpio_connect)) {
		err = devm_gpio_request_one(dev, hub->gpio_connect,
				GPIOF_OUT_INIT_LOW, "usb3503 connect");
		if (err) {
			dev_err(dev,
				"unable to request GPIO %d as connect pin (%d)\n",
				hub->gpio_connect, err);
			return err;
		}
	}

	if (gpio_is_valid(hub->gpio_reset)) {
		err = devm_gpio_request_one(dev, hub->gpio_reset,
				GPIOF_OUT_INIT_LOW, "usb3503 reset");
		if (err) {
			dev_err(dev,
				"unable to request GPIO %d as reset pin (%d)\n",
				hub->gpio_reset, err);
			return err;
		}
	}

	usb3503_switch_mode(hub, hub->mode);

	dev_info(dev, "%s: probed in %s mode\n", __func__,
			(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");

	return 0;
}

static int usb3503_i2c_probe(struct i2c_client *i2c,
			     const struct i2c_device_id *id)
{
	struct usb3503 *hub;
	int err;

	hub = devm_kzalloc(&i2c->dev, sizeof(struct usb3503), GFP_KERNEL);
	if (!hub) {
		dev_err(&i2c->dev, "private data alloc fail\n");
		return -ENOMEM;
	}

	i2c_set_clientdata(i2c, hub);
	hub->regmap = devm_regmap_init_i2c(i2c, &usb3503_regmap_config);
	if (IS_ERR(hub->regmap)) {
		err = PTR_ERR(hub->regmap);
		dev_err(&i2c->dev, "Failed to initialise regmap: %d\n", err);
		return err;
	}
	hub->dev = &i2c->dev;

	return usb3503_probe(hub);
}

static int usb3503_platform_probe(struct platform_device *pdev)
{
	struct usb3503 *hub;

	hub = devm_kzalloc(&pdev->dev, sizeof(struct usb3503), GFP_KERNEL);
	if (!hub) {
		dev_err(&pdev->dev, "private data alloc fail\n");
		return -ENOMEM;
	}
	hub->dev = &pdev->dev;

	return usb3503_probe(hub);
}

static const struct i2c_device_id usb3503_id[] = {
	{ USB3503_I2C_NAME, 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, usb3503_id);

#ifdef CONFIG_OF
static const struct of_device_id usb3503_of_match[] = {
	{ .compatible = "smsc,usb3503", },
	{ .compatible = "smsc,usb3503a", },
	{},
};
MODULE_DEVICE_TABLE(of, usb3503_of_match);
#endif

static struct i2c_driver usb3503_i2c_driver = {
	.driver = {
		.name = USB3503_I2C_NAME,
		.of_match_table = of_match_ptr(usb3503_of_match),
	},
	.probe		= usb3503_i2c_probe,
	.id_table	= usb3503_id,
};

static struct platform_driver usb3503_platform_driver = {
	.driver = {
		.name = USB3503_I2C_NAME,
		.of_match_table = of_match_ptr(usb3503_of_match),
		.owner = THIS_MODULE,
	},
	.probe		= usb3503_platform_probe,
};

static int __init usb3503_init(void)
{
	int err;

	err = i2c_register_driver(THIS_MODULE, &usb3503_i2c_driver);
	if (err != 0)
		pr_err("usb3503: Failed to register I2C driver: %d\n", err);

	err = platform_driver_register(&usb3503_platform_driver);
	if (err != 0)
		pr_err("usb3503: Failed to register platform driver: %d\n",
		       err);

	return 0;
}
module_init(usb3503_init);

static void __exit usb3503_exit(void)
{
	platform_driver_unregister(&usb3503_platform_driver);
	i2c_del_driver(&usb3503_i2c_driver);
}
module_exit(usb3503_exit);

MODULE_AUTHOR("Dongjin Kim <tobetter@gmail.com>");
MODULE_DESCRIPTION("USB3503 USB HUB driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
6a099c63 DK	1	/*
	2	* Driver for SMSC USB3503 USB 2.0 hub controller driver
	3	*
	4	* Copyright (c) 2012-2013 Dongjin Kim (tobetter@gmail.com)
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#include <linux/i2c.h>
	22	#include <linux/gpio.h>
	23	#include <linux/delay.h>
	24	#include <linux/slab.h>
	25	#include <linux/module.h>
eab8050c	26	#include <linux/of_gpio.h>
6a099c63 DK	27	#include <linux/platform_device.h>
6a099c63 DK	28	#include <linux/platform_data/usb3503.h>
68b14134	29	#include <linux/regmap.h>
6a099c63 DK	30
	31	#define USB3503_VIDL 0x00
	32	#define USB3503_VIDM 0x01
	33	#define USB3503_PIDL 0x02
	34	#define USB3503_PIDM 0x03
	35	#define USB3503_DIDL 0x04
	36	#define USB3503_DIDM 0x05
	37
	38	#define USB3503_CFG1 0x06
	39	#define USB3503_SELF_BUS_PWR (1 << 7)
	40
	41	#define USB3503_CFG2 0x07
	42	#define USB3503_CFG3 0x08
	43	#define USB3503_NRD 0x09
	44
	45	#define USB3503_PDS 0x0a
6a099c63 DK	46
	47	#define USB3503_SP_ILOCK 0xe7
	48	#define USB3503_SPILOCK_CONNECT (1 << 1)
	49	#define USB3503_SPILOCK_CONFIG (1 << 0)
	50
	51	#define USB3503_CFGP 0xee
	52	#define USB3503_CLKSUSP (1 << 7)
	53
68b14134 MB	54	#define USB3503_RESET 0xff
68b14134 MB	55
6a099c63 DK	56	struct usb3503 {
6a099c63 DK	57	enum usb3503_mode mode;
68b14134 MB	58	struct regmap *regmap;
68b14134 MB	59	struct device *dev;
e8e44a48	60	u8 port_off_mask;
6a099c63 DK	61	int gpio_intn;
	62	int gpio_reset;
	63	int gpio_connect;
	64	};
	65
8e7245b8	66	static int usb3503_reset(struct usb3503 *hub, int state)
6a099c63	67	{
8e7245b8 MB	68	if (!state && gpio_is_valid(hub->gpio_connect))
	69	gpio_set_value_cansleep(hub->gpio_connect, 0);
	70
	71	if (gpio_is_valid(hub->gpio_reset))
	72	gpio_set_value_cansleep(hub->gpio_reset, state);
6a099c63	73
06a962fa	74	/* Wait T_HUBINIT == 4ms for hub logic to stabilize */
6a099c63	75	if (state)
06a962fa	76	usleep_range(4000, 10000);
6a099c63 DK	77
	78	return 0;
	79	}
	80
3f0d1c67	81	static int usb3503_connect(struct usb3503 *hub)
6a099c63	82	{
68b14134	83	struct device *dev = hub->dev;
3f0d1c67	84	int err;
6a099c63	85
3f0d1c67	86	usb3503_reset(hub, 1);
6a099c63	87
3f0d1c67	88	if (hub->regmap) {
6a099c63	89	/* SP_ILOCK: set connect_n, config_n for config */
68b14134	90	err = regmap_write(hub->regmap, USB3503_SP_ILOCK,
3f0d1c67	91	(USB3503_SPILOCK_CONNECT
6a099c63 DK	92	\| USB3503_SPILOCK_CONFIG));
6a099c63 DK	93	if (err < 0) {
68b14134	94	dev_err(dev, "SP_ILOCK failed (%d)\n", err);
3f0d1c67	95	return err;
6a099c63 DK	96	}
6a099c63 DK	97
e8e44a48 DK	98	/* PDS : Disable For Self Powered Operation */
e8e44a48 DK	99	if (hub->port_off_mask) {
68b14134 MB	100	err = regmap_update_bits(hub->regmap, USB3503_PDS,
68b14134 MB	101	hub->port_off_mask,
e8e44a48 DK	102	hub->port_off_mask);
e8e44a48 DK	103	if (err < 0) {
68b14134	104	dev_err(dev, "PDS failed (%d)\n", err);
3f0d1c67	105	return err;
e8e44a48	106	}
6a099c63 DK	107	}
	108
	109	/* CFG1 : SELF_BUS_PWR -> Self-Powerd operation */
68b14134 MB	110	err = regmap_update_bits(hub->regmap, USB3503_CFG1,
	111	USB3503_SELF_BUS_PWR,
	112	USB3503_SELF_BUS_PWR);
6a099c63	113	if (err < 0) {
68b14134	114	dev_err(dev, "CFG1 failed (%d)\n", err);
3f0d1c67	115	return err;
6a099c63 DK	116	}
	117
	118	/* SP_LOCK: clear connect_n, config_n for hub connect */
68b14134 MB	119	err = regmap_update_bits(hub->regmap, USB3503_SP_ILOCK,
	120	(USB3503_SPILOCK_CONNECT
	121	\| USB3503_SPILOCK_CONFIG), 0);
6a099c63	122	if (err < 0) {
68b14134	123	dev_err(dev, "SP_ILOCK failed (%d)\n", err);
3f0d1c67	124	return err;
6a099c63	125	}
3f0d1c67	126	}
6a099c63	127
3f0d1c67 MB	128	if (gpio_is_valid(hub->gpio_connect))
3f0d1c67 MB	129	gpio_set_value_cansleep(hub->gpio_connect, 1);
8e7245b8	130
3f0d1c67 MB	131	hub->mode = USB3503_MODE_HUB;
	132	dev_info(dev, "switched to HUB mode\n");
	133
	134	return 0;
	135	}
	136
	137	static int usb3503_switch_mode(struct usb3503 *hub, enum usb3503_mode mode)
	138	{
	139	struct device *dev = hub->dev;
	140	int err = 0;
	141
	142	switch (mode) {
	143	case USB3503_MODE_HUB:
	144	err = usb3503_connect(hub);
6a099c63 DK	145	break;
	146
	147	case USB3503_MODE_STANDBY:
8e7245b8	148	usb3503_reset(hub, 0);
6a099c63 DK	149
6a099c63 DK	150	hub->mode = mode;
68b14134	151	dev_info(dev, "switched to STANDBY mode\n");
6a099c63 DK	152	break;
	153
	154	default:
dd8e670d	155	dev_err(dev, "unknown mode is requested\n");
6a099c63 DK	156	err = -EINVAL;
	157	break;
	158	}
	159
6a099c63 DK	160	return err;
	161	}
	162
68b14134 MB	163	static const struct regmap_config usb3503_regmap_config = {
	164	.reg_bits = 8,
	165	.val_bits = 8,
	166
	167	.max_register = USB3503_RESET,
	168	};
	169
2487e3ee	170	static int usb3503_probe(struct usb3503 *hub)
6a099c63	171	{
2487e3ee MB	172	struct device *dev = hub->dev;
	173	struct usb3503_platform_data *pdata = dev_get_platdata(dev);
	174	struct device_node *np = dev->of_node;
	175	int err;
e5a0c874	176	u32 mode = USB3503_MODE_HUB;
e8b58b49 DK	177	const u32 *property;
e8b58b49 DK	178	int len;
6a099c63	179
eab8050c	180	if (pdata) {
e8e44a48	181	hub->port_off_mask = pdata->port_off_mask;
6a099c63 DK	182	hub->gpio_intn = pdata->gpio_intn;
	183	hub->gpio_connect = pdata->gpio_connect;
	184	hub->gpio_reset = pdata->gpio_reset;
	185	hub->mode = pdata->initial_mode;
eab8050c	186	} else if (np) {
e8b58b49 DK	187	hub->port_off_mask = 0;
	188
	189	property = of_get_property(np, "disabled-ports", &len);
	190	if (property && (len / sizeof(u32)) > 0) {
	191	int i;
	192	for (i = 0; i < len / sizeof(u32); i++) {
	193	u32 port = be32_to_cpu(property[i]);
	194	if ((1 <= port) && (port <= 3))
	195	hub->port_off_mask \|= (1 << port);
	196	}
	197	}
	198
42416cc8	199	hub->gpio_intn = of_get_named_gpio(np, "intn-gpios", 0);
eab8050c DK	200	if (hub->gpio_intn == -EPROBE_DEFER)
eab8050c DK	201	return -EPROBE_DEFER;
42416cc8	202	hub->gpio_connect = of_get_named_gpio(np, "connect-gpios", 0);
eab8050c DK	203	if (hub->gpio_connect == -EPROBE_DEFER)
eab8050c DK	204	return -EPROBE_DEFER;
ccf92c94	205	hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
eab8050c DK	206	if (hub->gpio_reset == -EPROBE_DEFER)
	207	return -EPROBE_DEFER;
	208	of_property_read_u32(np, "initial-mode", &mode);
	209	hub->mode = mode;
6a099c63 DK	210	}
6a099c63 DK	211
3f0d1c67 MB	212	if (hub->port_off_mask && !hub->regmap)
	213	dev_err(dev, "Ports disabled with no control interface\n");
	214
6a099c63	215	if (gpio_is_valid(hub->gpio_intn)) {
2487e3ee	216	err = devm_gpio_request_one(dev, hub->gpio_intn,
6a099c63 DK	217	GPIOF_OUT_INIT_HIGH, "usb3503 intn");
6a099c63 DK	218	if (err) {
2487e3ee MB	219	dev_err(dev,
	220	"unable to request GPIO %d as connect pin (%d)\n",
	221	hub->gpio_intn, err);
cffedd67	222	return err;
6a099c63 DK	223	}
	224	}
	225
	226	if (gpio_is_valid(hub->gpio_connect)) {
2487e3ee	227	err = devm_gpio_request_one(dev, hub->gpio_connect,
8e7245b8	228	GPIOF_OUT_INIT_LOW, "usb3503 connect");
6a099c63	229	if (err) {
2487e3ee MB	230	dev_err(dev,
	231	"unable to request GPIO %d as connect pin (%d)\n",
	232	hub->gpio_connect, err);
cffedd67	233	return err;
6a099c63 DK	234	}
	235	}
	236
	237	if (gpio_is_valid(hub->gpio_reset)) {
2487e3ee	238	err = devm_gpio_request_one(dev, hub->gpio_reset,
6a099c63 DK	239	GPIOF_OUT_INIT_LOW, "usb3503 reset");
6a099c63 DK	240	if (err) {
2487e3ee MB	241	dev_err(dev,
	242	"unable to request GPIO %d as reset pin (%d)\n",
	243	hub->gpio_reset, err);
cffedd67	244	return err;
6a099c63 DK	245	}
	246	}
	247
eab8050c	248	usb3503_switch_mode(hub, hub->mode);
6a099c63	249
dd8e670d	250	dev_info(dev, "%s: probed in %s mode\n", __func__,
6a099c63 DK	251	(hub->mode == USB3503_MODE_HUB) ? "hub" : "standby");
	252
	253	return 0;
6a099c63 DK	254	}
6a099c63 DK	255
2487e3ee MB	256	static int usb3503_i2c_probe(struct i2c_client *i2c,
	257	const struct i2c_device_id *id)
	258	{
	259	struct usb3503 *hub;
	260	int err;
	261
	262	hub = devm_kzalloc(&i2c->dev, sizeof(struct usb3503), GFP_KERNEL);
	263	if (!hub) {
	264	dev_err(&i2c->dev, "private data alloc fail\n");
	265	return -ENOMEM;
	266	}
	267
	268	i2c_set_clientdata(i2c, hub);
	269	hub->regmap = devm_regmap_init_i2c(i2c, &usb3503_regmap_config);
	270	if (IS_ERR(hub->regmap)) {
	271	err = PTR_ERR(hub->regmap);
	272	dev_err(&i2c->dev, "Failed to initialise regmap: %d\n", err);
	273	return err;
	274	}
	275	hub->dev = &i2c->dev;
	276
	277	return usb3503_probe(hub);
	278	}
	279
3f0d1c67 MB	280	static int usb3503_platform_probe(struct platform_device *pdev)
	281	{
	282	struct usb3503 *hub;
	283
	284	hub = devm_kzalloc(&pdev->dev, sizeof(struct usb3503), GFP_KERNEL);
	285	if (!hub) {
	286	dev_err(&pdev->dev, "private data alloc fail\n");
	287	return -ENOMEM;
	288	}
	289	hub->dev = &pdev->dev;
	290
	291	return usb3503_probe(hub);
	292	}
	293
6a099c63 DK	294	static const struct i2c_device_id usb3503_id[] = {
	295	{ USB3503_I2C_NAME, 0 },
	296	{ }
	297	};
	298	MODULE_DEVICE_TABLE(i2c, usb3503_id);
	299
eab8050c DK	300	#ifdef CONFIG_OF
	301	static const struct of_device_id usb3503_of_match[] = {
	302	{ .compatible = "smsc,usb3503", },
5bdd1f4a	303	{ .compatible = "smsc,usb3503a", },
eab8050c DK	304	{},
	305	};
	306	MODULE_DEVICE_TABLE(of, usb3503_of_match);
	307	#endif
	308
3f0d1c67	309	static struct i2c_driver usb3503_i2c_driver = {
6a099c63 DK	310	.driver = {
6a099c63 DK	311	.name = USB3503_I2C_NAME,
eab8050c	312	.of_match_table = of_match_ptr(usb3503_of_match),
6a099c63	313	},
2487e3ee	314	.probe = usb3503_i2c_probe,
6a099c63 DK	315	.id_table = usb3503_id,
	316	};
	317
3f0d1c67 MB	318	static struct platform_driver usb3503_platform_driver = {
	319	.driver = {
	320	.name = USB3503_I2C_NAME,
	321	.of_match_table = of_match_ptr(usb3503_of_match),
	322	.owner = THIS_MODULE,
	323	},
	324	.probe = usb3503_platform_probe,
	325	};
	326
	327	static int __init usb3503_init(void)
	328	{
	329	int err;
	330
	331	err = i2c_register_driver(THIS_MODULE, &usb3503_i2c_driver);
	332	if (err != 0)
	333	pr_err("usb3503: Failed to register I2C driver: %d\n", err);
	334
	335	err = platform_driver_register(&usb3503_platform_driver);
	336	if (err != 0)
	337	pr_err("usb3503: Failed to register platform driver: %d\n",
	338	err);
	339
	340	return 0;
	341	}
	342	module_init(usb3503_init);
	343
	344	static void __exit usb3503_exit(void)
	345	{
	346	platform_driver_unregister(&usb3503_platform_driver);
	347	i2c_del_driver(&usb3503_i2c_driver);
	348	}
	349	module_exit(usb3503_exit);
6a099c63 DK	350
	351	MODULE_AUTHOR("Dongjin Kim <tobetter@gmail.com>");
	352	MODULE_DESCRIPTION("USB3503 USB HUB driver");
	353	MODULE_LICENSE("GPL");