[mirror_ubuntu-hirsute-kernel.git] / drivers / media / i2c / 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.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/videodev2.h>
#include <media/v4l2-device.h>
#include <media/i2c/uda1342.h>
#include <linux/slab.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 uda1342_s_routing(struct v4l2_subdev *sd,
		u32 input, u32 output, u32 config)
{
	struct i2c_client *client = v4l2_get_subdevdata(sd);

	switch (input) {
	case UDA1342_IN1:
		write_reg(client, 0x00, 0x1241); /* select input 1 */
		break;
	case UDA1342_IN2:
		write_reg(client, 0x00, 0x1441); /* select input 2 */
		break;
	default:
		v4l2_err(sd, "input %d not supported\n", input);
		break;
	}
	return 0;
}

static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
	.s_routing = uda1342_s_routing,
};

static const struct v4l2_subdev_ops uda1342_ops = {
	.audio = &uda1342_audio_ops,
};

static int uda1342_probe(struct i2c_client *client,
			     const struct i2c_device_id *id)
{
	struct i2c_adapter *adapter = client->adapter;
	struct v4l2_subdev *sd;

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

	dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
		client->addr, adapter->name);

	sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
	if (sd == NULL)
		return -ENOMEM;

	v4l2_i2c_subdev_init(sd, client, &uda1342_ops);

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

	v4l_info(client, "chip found @ 0x%02x (%s)\n",
			client->addr << 1, client->adapter->name);

	return 0;
}

static int uda1342_remove(struct i2c_client *client)
{
	struct v4l2_subdev *sd = i2c_get_clientdata(client);

	v4l2_device_unregister_subdev(sd);
	return 0;
}

static const struct i2c_device_id uda1342_id[] = {
	{ "uda1342", 0 },
	{ }
};
MODULE_DEVICE_TABLE(i2c, uda1342_id);

static struct i2c_driver uda1342_driver = {
	.driver = {
		.name	= "uda1342",
	},
	.probe		= uda1342_probe,
	.remove		= uda1342_remove,
	.id_table	= uda1342_id,
};

module_i2c_driver(uda1342_driver);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
73d9f979 HV	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.
73d9f979 HV	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/init.h>
	16	#include <linux/i2c.h>
	17	#include <linux/videodev2.h>
	18	#include <media/v4l2-device.h>
b5dcee22	19	#include <media/i2c/uda1342.h>
73d9f979 HV	20	#include <linux/slab.h>
	21
	22	static int write_reg(struct i2c_client *client, int reg, int value)
	23	{
	24	/* UDA1342 wants MSB first, but SMBus sends LSB first */
	25	i2c_smbus_write_word_data(client, reg, swab16(value));
	26	return 0;
	27	}
	28
	29	static int uda1342_s_routing(struct v4l2_subdev *sd,
	30	u32 input, u32 output, u32 config)
	31	{
	32	struct i2c_client *client = v4l2_get_subdevdata(sd);
	33
	34	switch (input) {
	35	case UDA1342_IN1:
	36	write_reg(client, 0x00, 0x1241); /* select input 1 */
	37	break;
	38	case UDA1342_IN2:
	39	write_reg(client, 0x00, 0x1441); /* select input 2 */
	40	break;
	41	default:
	42	v4l2_err(sd, "input %d not supported\n", input);
	43	break;
	44	}
	45	return 0;
	46	}
	47
	48	static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
	49	.s_routing = uda1342_s_routing,
	50	};
	51
	52	static const struct v4l2_subdev_ops uda1342_ops = {
	53	.audio = &uda1342_audio_ops,
	54	};
	55
	56	static int uda1342_probe(struct i2c_client *client,
	57	const struct i2c_device_id *id)
	58	{
	59	struct i2c_adapter *adapter = client->adapter;
	60	struct v4l2_subdev *sd;
	61
	62	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
	63	return -ENODEV;
	64
	65	dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
	66	client->addr, adapter->name);
	67
c02b211d	68	sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
73d9f979 HV	69	if (sd == NULL)
	70	return -ENOMEM;
	71
	72	v4l2_i2c_subdev_init(sd, client, &uda1342_ops);
	73
	74	write_reg(client, 0x00, 0x8000); /* reset registers */
	75	write_reg(client, 0x00, 0x1241); /* select input 1 */
	76
	77	v4l_info(client, "chip found @ 0x%02x (%s)\n",
	78	client->addr << 1, client->adapter->name);
	79
	80	return 0;
	81	}
	82
	83	static int uda1342_remove(struct i2c_client *client)
	84	{
	85	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	86
	87	v4l2_device_unregister_subdev(sd);
73d9f979 HV	88	return 0;
	89	}
	90
	91	static const struct i2c_device_id uda1342_id[] = {
	92	{ "uda1342", 0 },
	93	{ }
	94	};
	95	MODULE_DEVICE_TABLE(i2c, uda1342_id);
	96
	97	static struct i2c_driver uda1342_driver = {
	98	.driver = {
	99	.name = "uda1342",
	100	},
	101	.probe = uda1342_probe,
	102	.remove = uda1342_remove,
	103	.id_table = uda1342_id,
	104	};
	105
	106	module_i2c_driver(uda1342_driver);
	107
	108	MODULE_LICENSE("GPL v2");