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Commit 73d9f979 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
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[media] uda1342: add new uda1342 audio codec driver 



This based on the wis-uda1342.c driver that's part of the go7007 driver.
It has been converted to a v4l subdev driver by Pete Eberlein, and I made
additional cleanups.
Based on work by: Pete Eberlein <pete@sensoray.com>

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent ec367c3c

drivers/media/i2c/Kconfig

+9 −0
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@@ -112,6 +112,15 @@ config VIDEO_TLV320AIC23B 
	  To compile this driver as a module, choose M here: the

	  module will be called tlv320aic23b.



config VIDEO_UDA1342

	tristate "Philips UDA1342 audio codec"

	depends on VIDEO_V4L2 && I2C

	---help---

	  Support for the Philips UDA1342 audio codec.



	  To compile this driver as a module, choose M here: the

	  module will be called uda1342.



config VIDEO_WM8775

	tristate "Wolfson Microelectronics WM8775 audio ADC with input mixer"

	depends on VIDEO_V4L2 && I2C

drivers/media/i2c/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ obj-$(CONFIG_VIDEO_CS5345) += cs5345.o 
obj-$(CONFIG_VIDEO_CS53L32A) += cs53l32a.o

obj-$(CONFIG_VIDEO_M52790) += m52790.o

obj-$(CONFIG_VIDEO_TLV320AIC23B) += tlv320aic23b.o

obj-$(CONFIG_VIDEO_UDA1342) += uda1342.o

obj-$(CONFIG_VIDEO_WM8775) += wm8775.o

obj-$(CONFIG_VIDEO_WM8739) += wm8739.o

obj-$(CONFIG_VIDEO_VP27SMPX) += vp27smpx.o

drivers/media/i2c/uda1342.c

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/*

 * 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/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 = kzalloc(sizeof(struct v4l2_subdev), 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);

	kfree(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");

include/media/uda1342.h

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+29 −0
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/*

 * uda1342.h - definition for uda1342 inputs

 *

 * Copyright 2013 Cisco Systems, Inc. and/or its affiliates. All rights reserved.

 *

 * This program is free software; you may redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; version 2 of the License.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

 * SOFTWARE.

 *

 */



#ifndef _UDA1342_H_

#define _UDA1342_H_



/* The UDA1342 has 2 inputs */



#define UDA1342_IN1 1

#define UDA1342_IN2 2



#endif