[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / staging / go7007 / wis-uda1342.c

/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/tvaudio.h>
#include <media/v4l2-common.h>

#include "wis-i2c.h"

static int write_reg(struct i2c_client *client, int reg, int value)
{
	/* UDA1342 wants MSB first, but SMBus sends LSB first */
	i2c_smbus_write_word_data(client, reg, swab16(value));
	return 0;
}

static int wis_uda1342_command(struct i2c_client *client,
				unsigned int cmd, void *arg)
{
	switch (cmd) {
	case VIDIOC_S_AUDIO:
	{
		int *inp = arg;

		switch (*inp) {
		case TVAUDIO_INPUT_TUNER:
			write_reg(client, 0x00, 0x1441); /* select input 2 */
			break;
		case TVAUDIO_INPUT_EXTERN:
			write_reg(client, 0x00, 0x1241); /* select input 1 */
			break;
		default:
			printk(KERN_ERR "wis-uda1342: input %d not supported\n",
					*inp);
			break;
		}
		break;
	}
	default:
		break;
	}
	return 0;
}

static int wis_uda1342_probe(struct i2c_client *client,
			     const struct i2c_device_id *id)
{
	struct i2c_adapter *adapter = client->adapter;

	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
		return -ENODEV;

	printk(KERN_DEBUG
		"wis-uda1342: initializing UDA1342 at address %d on %s\n",
		client->addr, adapter->name);

	write_reg(client, 0x00, 0x8000); /* reset registers */
	write_reg(client, 0x00, 0x1241); /* select input 1 */

	return 0;
}

static int wis_uda1342_remove(struct i2c_client *client)
{
	return 0;
}

static const struct i2c_device_id wis_uda1342_id[] = {
	{ "wis_uda1342", 0 },
	{ }
};

static struct i2c_driver wis_uda1342_driver = {
	.driver = {
		.name	= "WIS UDA1342 I2C driver",
	},
	.probe		= wis_uda1342_probe,
	.remove		= wis_uda1342_remove,
	.command	= wis_uda1342_command,
	.id_table	= wis_uda1342_id,
};

static int __init wis_uda1342_init(void)
{
	return i2c_add_driver(&wis_uda1342_driver);
}

static void __exit wis_uda1342_cleanup(void)
{
	i2c_del_driver(&wis_uda1342_driver);
}

module_init(wis_uda1342_init);
module_exit(wis_uda1342_cleanup);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
866b8695 GKH	1	/*
	2	* Copyright (C) 2005-2006 Micronas USA Inc.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License (Version 2) as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software Foundation,
	15	* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	16	*/
	17
	18	#include <linux/module.h>
	19	#include <linux/init.h>
866b8695	20	#include <linux/i2c.h>
df20d69e	21	#include <linux/videodev2.h>
866b8695 GKH	22	#include <media/tvaudio.h>
	23	#include <media/v4l2-common.h>
	24
	25	#include "wis-i2c.h"
	26
	27	static int write_reg(struct i2c_client *client, int reg, int value)
	28	{
	29	/* UDA1342 wants MSB first, but SMBus sends LSB first */
	30	i2c_smbus_write_word_data(client, reg, swab16(value));
	31	return 0;
	32	}
	33
	34	static int wis_uda1342_command(struct i2c_client *client,
	35	unsigned int cmd, void *arg)
	36	{
	37	switch (cmd) {
	38	case VIDIOC_S_AUDIO:
	39	{
	40	int *inp = arg;
	41
	42	switch (*inp) {
	43	case TVAUDIO_INPUT_TUNER:
	44	write_reg(client, 0x00, 0x1441); /* select input 2 */
	45	break;
	46	case TVAUDIO_INPUT_EXTERN:
	47	write_reg(client, 0x00, 0x1241); /* select input 1 */
	48	break;
	49	default:
	50	printk(KERN_ERR "wis-uda1342: input %d not supported\n",
	51	*inp);
	52	break;
	53	}
	54	break;
	55	}
	56	default:
	57	break;
	58	}
	59	return 0;
	60	}
	61
7400516a JD	62	static int wis_uda1342_probe(struct i2c_client *client,
7400516a JD	63	const struct i2c_device_id *id)
866b8695	64	{
7400516a	65	struct i2c_adapter *adapter = client->adapter;
866b8695 GKH	66
866b8695 GKH	67	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
7400516a	68	return -ENODEV;
866b8695 GKH	69
	70	printk(KERN_DEBUG
	71	"wis-uda1342: initializing UDA1342 at address %d on %s\n",
7400516a	72	client->addr, adapter->name);
866b8695 GKH	73
	74	write_reg(client, 0x00, 0x8000); /* reset registers */
	75	write_reg(client, 0x00, 0x1241); /* select input 1 */
	76
866b8695 GKH	77	return 0;
	78	}
	79
7400516a	80	static int wis_uda1342_remove(struct i2c_client *client)
866b8695	81	{
866b8695 GKH	82	return 0;
	83	}
	84
b76a3263	85	static const struct i2c_device_id wis_uda1342_id[] = {
7400516a JD	86	{ "wis_uda1342", 0 },
	87	{ }
	88	};
	89
866b8695 GKH	90	static struct i2c_driver wis_uda1342_driver = {
	91	.driver = {
	92	.name = "WIS UDA1342 I2C driver",
	93	},
7400516a JD	94	.probe = wis_uda1342_probe,
7400516a JD	95	.remove = wis_uda1342_remove,
866b8695	96	.command = wis_uda1342_command,
7400516a	97	.id_table = wis_uda1342_id,
866b8695 GKH	98	};
	99
	100	static int __init wis_uda1342_init(void)
	101	{
7400516a	102	return i2c_add_driver(&wis_uda1342_driver);
866b8695 GKH	103	}
	104
	105	static void __exit wis_uda1342_cleanup(void)
	106	{
866b8695 GKH	107	i2c_del_driver(&wis_uda1342_driver);
	108	}
	109
	110	module_init(wis_uda1342_init);
	111	module_exit(wis_uda1342_cleanup);
	112
	113	MODULE_LICENSE("GPL v2");