[deliverable/linux.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.
 *
 * 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/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.
	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>
	20	#include <linux/i2c.h>
	21	#include <linux/videodev2.h>
	22	#include <media/v4l2-device.h>
b5dcee22	23	#include <media/i2c/uda1342.h>
73d9f979 HV	24	#include <linux/slab.h>
	25
	26	static int write_reg(struct i2c_client *client, int reg, int value)
	27	{
	28	/* UDA1342 wants MSB first, but SMBus sends LSB first */
	29	i2c_smbus_write_word_data(client, reg, swab16(value));
	30	return 0;
	31	}
	32
	33	static int uda1342_s_routing(struct v4l2_subdev *sd,
	34	u32 input, u32 output, u32 config)
	35	{
	36	struct i2c_client *client = v4l2_get_subdevdata(sd);
	37
	38	switch (input) {
	39	case UDA1342_IN1:
	40	write_reg(client, 0x00, 0x1241); /* select input 1 */
	41	break;
	42	case UDA1342_IN2:
	43	write_reg(client, 0x00, 0x1441); /* select input 2 */
	44	break;
	45	default:
	46	v4l2_err(sd, "input %d not supported\n", input);
	47	break;
	48	}
	49	return 0;
	50	}
	51
	52	static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
	53	.s_routing = uda1342_s_routing,
	54	};
	55
	56	static const struct v4l2_subdev_ops uda1342_ops = {
	57	.audio = &uda1342_audio_ops,
	58	};
	59
	60	static int uda1342_probe(struct i2c_client *client,
	61	const struct i2c_device_id *id)
	62	{
	63	struct i2c_adapter *adapter = client->adapter;
	64	struct v4l2_subdev *sd;
	65
	66	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
	67	return -ENODEV;
	68
	69	dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
	70	client->addr, adapter->name);
	71
c02b211d	72	sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
73d9f979 HV	73	if (sd == NULL)
	74	return -ENOMEM;
	75
	76	v4l2_i2c_subdev_init(sd, client, &uda1342_ops);
	77
	78	write_reg(client, 0x00, 0x8000); /* reset registers */
	79	write_reg(client, 0x00, 0x1241); /* select input 1 */
	80
	81	v4l_info(client, "chip found @ 0x%02x (%s)\n",
	82	client->addr << 1, client->adapter->name);
	83
	84	return 0;
	85	}
	86
	87	static int uda1342_remove(struct i2c_client *client)
	88	{
	89	struct v4l2_subdev *sd = i2c_get_clientdata(client);
	90
	91	v4l2_device_unregister_subdev(sd);
73d9f979 HV	92	return 0;
	93	}
	94
	95	static const struct i2c_device_id uda1342_id[] = {
	96	{ "uda1342", 0 },
	97	{ }
	98	};
	99	MODULE_DEVICE_TABLE(i2c, uda1342_id);
	100
	101	static struct i2c_driver uda1342_driver = {
	102	.driver = {
	103	.name = "uda1342",
	104	},
	105	.probe = uda1342_probe,
	106	.remove = uda1342_remove,
	107	.id_table = uda1342_id,
	108	};
	109
	110	module_i2c_driver(uda1342_driver);
	111
	112	MODULE_LICENSE("GPL v2");