[deliverable/linux.git] / drivers / input / misc / ad714x-i2c.c

/*
 * AD714X CapTouch Programmable Controller driver (I2C bus)
 *
 * Copyright 2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/input.h>	/* BUS_I2C */
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pm.h>
#include "ad714x.h"

#ifdef CONFIG_PM
static int ad714x_i2c_suspend(struct device *dev)
{
	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
}

static int ad714x_i2c_resume(struct device *dev)
{
	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
}
#endif

static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);

static int ad714x_i2c_write(struct device *dev, unsigned short reg,
				unsigned short data)
{
	struct i2c_client *client = to_i2c_client(dev);
	int ret = 0;
	unsigned short tx[2] = {
		cpu_to_be16(reg),
		cpu_to_be16(data)
	};

	ret = i2c_master_send(client, (u8 *)tx, 4);
	if (ret < 0)
		dev_err(&client->dev, "I2C write error\n");

	return ret;
}

static int ad714x_i2c_read(struct device *dev, unsigned short reg,
				unsigned short *data)
{
	struct i2c_client *client = to_i2c_client(dev);
	int ret = 0;
	unsigned short tx = cpu_to_be16(reg);

	ret = i2c_master_send(client, (u8 *)&tx, 2);
	if (ret >= 0)
		ret = i2c_master_recv(client, (u8 *)data, 2);

	if (unlikely(ret < 0))
		dev_err(&client->dev, "I2C read error\n");
	else
		*data = be16_to_cpu(*data);

	return ret;
}

static int __devinit ad714x_i2c_probe(struct i2c_client *client,
					const struct i2c_device_id *id)
{
	struct ad714x_chip *chip;

	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
			    ad714x_i2c_read, ad714x_i2c_write);
	if (IS_ERR(chip))
		return PTR_ERR(chip);

	i2c_set_clientdata(client, chip);

	return 0;
}

static int __devexit ad714x_i2c_remove(struct i2c_client *client)
{
	struct ad714x_chip *chip = i2c_get_clientdata(client);

	ad714x_remove(chip);

	return 0;
}

static const struct i2c_device_id ad714x_id[] = {
	{ "ad7142_captouch", 0 },
	{ "ad7143_captouch", 0 },
	{ "ad7147_captouch", 0 },
	{ "ad7147a_captouch", 0 },
	{ "ad7148_captouch", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, ad714x_id);

static struct i2c_driver ad714x_i2c_driver = {
	.driver = {
		.name = "ad714x_captouch",
		.pm   = &ad714x_i2c_pm,
	},
	.probe    = ad714x_i2c_probe,
	.remove   = __devexit_p(ad714x_i2c_remove),
	.id_table = ad714x_id,
};

static __init int ad714x_i2c_init(void)
{
	return i2c_add_driver(&ad714x_i2c_driver);
}
module_init(ad714x_i2c_init);

static __exit void ad714x_i2c_exit(void)
{
	i2c_del_driver(&ad714x_i2c_driver);
}
module_exit(ad714x_i2c_exit);

MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
31a62963 BW	1	/*
	2	* AD714X CapTouch Programmable Controller driver (I2C bus)
	3	*
	4	* Copyright 2009 Analog Devices Inc.
	5	*
	6	* Licensed under the GPL-2 or later.
	7	*/
	8
	9	#include <linux/input.h> /* BUS_I2C */
	10	#include <linux/i2c.h>
	11	#include <linux/module.h>
	12	#include <linux/types.h>
6b7cfd19	13	#include <linux/pm.h>
31a62963 BW	14	#include "ad714x.h"
	15
	16	#ifdef CONFIG_PM
6b7cfd19	17	static int ad714x_i2c_suspend(struct device *dev)
31a62963	18	{
6b7cfd19	19	return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963 BW	20	}
31a62963 BW	21
6b7cfd19	22	static int ad714x_i2c_resume(struct device *dev)
31a62963	23	{
6b7cfd19	24	return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
31a62963	25	}
31a62963 BW	26	#endif
31a62963 BW	27
6b7cfd19 MB	28	static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);
6b7cfd19 MB	29
31a62963 BW	30	static int ad714x_i2c_write(struct device *dev, unsigned short reg,
	31	unsigned short data)
	32	{
	33	struct i2c_client *client = to_i2c_client(dev);
	34	int ret = 0;
6337de22 MH	35	unsigned short tx[2] = {
	36	cpu_to_be16(reg),
	37	cpu_to_be16(data)
31a62963 BW	38	};
31a62963 BW	39
6337de22	40	ret = i2c_master_send(client, (u8 *)tx, 4);
31a62963 BW	41	if (ret < 0)
	42	dev_err(&client->dev, "I2C write error\n");
	43
	44	return ret;
	45	}
	46
	47	static int ad714x_i2c_read(struct device *dev, unsigned short reg,
	48	unsigned short *data)
	49	{
	50	struct i2c_client *client = to_i2c_client(dev);
	51	int ret = 0;
6337de22	52	unsigned short tx = cpu_to_be16(reg);
31a62963	53
6337de22	54	ret = i2c_master_send(client, (u8 *)&tx, 2);
31a62963	55	if (ret >= 0)
6337de22	56	ret = i2c_master_recv(client, (u8 *)data, 2);
31a62963	57
6337de22	58	if (unlikely(ret < 0))
31a62963	59	dev_err(&client->dev, "I2C read error\n");
6337de22 MH	60	else
6337de22 MH	61	data = be16_to_cpu(data);
31a62963 BW	62
	63	return ret;
	64	}
	65
	66	static int __devinit ad714x_i2c_probe(struct i2c_client *client,
	67	const struct i2c_device_id *id)
	68	{
	69	struct ad714x_chip *chip;
	70
	71	chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
	72	ad714x_i2c_read, ad714x_i2c_write);
	73	if (IS_ERR(chip))
	74	return PTR_ERR(chip);
	75
	76	i2c_set_clientdata(client, chip);
	77
	78	return 0;
	79	}
	80
	81	static int __devexit ad714x_i2c_remove(struct i2c_client *client)
	82	{
	83	struct ad714x_chip *chip = i2c_get_clientdata(client);
	84
	85	ad714x_remove(chip);
31a62963 BW	86
	87	return 0;
	88	}
	89
	90	static const struct i2c_device_id ad714x_id[] = {
	91	{ "ad7142_captouch", 0 },
6c04d7b3	92	{ "ad7143_captouch", 0 },
31a62963	93	{ "ad7147_captouch", 0 },
6c04d7b3 BS	94	{ "ad7147a_captouch", 0 },
6c04d7b3 BS	95	{ "ad7148_captouch", 0 },
31a62963 BW	96	{ }
	97	};
	98	MODULE_DEVICE_TABLE(i2c, ad714x_id);
	99
	100	static struct i2c_driver ad714x_i2c_driver = {
	101	.driver = {
	102	.name = "ad714x_captouch",
6b7cfd19	103	.pm = &ad714x_i2c_pm,
31a62963 BW	104	},
	105	.probe = ad714x_i2c_probe,
	106	.remove = __devexit_p(ad714x_i2c_remove),
31a62963 BW	107	.id_table = ad714x_id,
	108	};
	109
	110	static __init int ad714x_i2c_init(void)
	111	{
	112	return i2c_add_driver(&ad714x_i2c_driver);
	113	}
	114	module_init(ad714x_i2c_init);
	115
	116	static __exit void ad714x_i2c_exit(void)
	117	{
	118	i2c_del_driver(&ad714x_i2c_driver);
	119	}
	120	module_exit(ad714x_i2c_exit);
	121
	122	MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
	123	MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
	124	MODULE_LICENSE("GPL");