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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/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 struct i2c_driver wis_uda1342_driver;
static struct i2c_client wis_uda1342_client_templ = {
.name = "UDA1342 (WIS)",
.driver = &wis_uda1342_driver,
};
static int wis_uda1342_detect(struct i2c_adapter *adapter, int addr, int kind)
{
struct i2c_client *client;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
return 0;
client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
if (client == NULL)
return -ENOMEM;
memcpy(client, &wis_uda1342_client_templ,
sizeof(wis_uda1342_client_templ));
client->adapter = adapter;
client->addr = addr;
printk(KERN_DEBUG
"wis-uda1342: initializing UDA1342 at address %d on %s\n",
addr, adapter->name);
write_reg(client, 0x00, 0x8000); /* reset registers */
write_reg(client, 0x00, 0x1241); /* select input 1 */
i2c_attach_client(client);
return 0;
}
static int wis_uda1342_detach(struct i2c_client *client)
{
int r;
r = i2c_detach_client(client);
if (r < 0)
return r;
kfree(client);
return 0;
}
static struct i2c_driver wis_uda1342_driver = {
.driver = {
.name = "WIS UDA1342 I2C driver",
},
.id = I2C_DRIVERID_WIS_UDA1342,
.detach_client = wis_uda1342_detach,
.command = wis_uda1342_command,
};
static int __init wis_uda1342_init(void)
{
int r;
r = i2c_add_driver(&wis_uda1342_driver);
if (r < 0)
return r;
return wis_i2c_add_driver(wis_uda1342_driver.id, wis_uda1342_detect);
}
static void __exit wis_uda1342_cleanup(void)
{
wis_i2c_del_driver(wis_uda1342_detect);
i2c_del_driver(&wis_uda1342_driver);
}
module_init(wis_uda1342_init);
module_exit(wis_uda1342_cleanup);
MODULE_LICENSE("GPL v2");
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