152 lines
3.5 KiB
C
152 lines
3.5 KiB
C
/*
|
|
* ths7303- THS7303 Video Amplifier driver
|
|
*
|
|
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation version 2.
|
|
*
|
|
* This program is distributed .as is. WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ctype.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/device.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/module.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/videodev2.h>
|
|
|
|
#include <media/v4l2-device.h>
|
|
#include <media/v4l2-subdev.h>
|
|
#include <media/v4l2-chip-ident.h>
|
|
|
|
MODULE_DESCRIPTION("TI THS7303 video amplifier driver");
|
|
MODULE_AUTHOR("Chaithrika U S");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static int debug;
|
|
module_param(debug, int, 0644);
|
|
MODULE_PARM_DESC(debug, "Debug level 0-1");
|
|
|
|
/* following function is used to set ths7303 */
|
|
static int ths7303_setvalue(struct v4l2_subdev *sd, v4l2_std_id std)
|
|
{
|
|
int err = 0;
|
|
u8 val;
|
|
struct i2c_client *client;
|
|
|
|
client = v4l2_get_subdevdata(sd);
|
|
|
|
if (std & (V4L2_STD_ALL & ~V4L2_STD_SECAM)) {
|
|
val = 0x02;
|
|
v4l2_dbg(1, debug, sd, "setting value for SDTV format\n");
|
|
} else {
|
|
val = 0x00;
|
|
v4l2_dbg(1, debug, sd, "disabling all channels\n");
|
|
}
|
|
|
|
err |= i2c_smbus_write_byte_data(client, 0x01, val);
|
|
err |= i2c_smbus_write_byte_data(client, 0x02, val);
|
|
err |= i2c_smbus_write_byte_data(client, 0x03, val);
|
|
|
|
if (err)
|
|
v4l2_err(sd, "write failed\n");
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ths7303_s_std_output(struct v4l2_subdev *sd, v4l2_std_id norm)
|
|
{
|
|
return ths7303_setvalue(sd, norm);
|
|
}
|
|
|
|
static int ths7303_g_chip_ident(struct v4l2_subdev *sd,
|
|
struct v4l2_dbg_chip_ident *chip)
|
|
{
|
|
struct i2c_client *client = v4l2_get_subdevdata(sd);
|
|
|
|
return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_THS7303, 0);
|
|
}
|
|
|
|
static const struct v4l2_subdev_video_ops ths7303_video_ops = {
|
|
.s_std_output = ths7303_s_std_output,
|
|
};
|
|
|
|
static const struct v4l2_subdev_core_ops ths7303_core_ops = {
|
|
.g_chip_ident = ths7303_g_chip_ident,
|
|
};
|
|
|
|
static const struct v4l2_subdev_ops ths7303_ops = {
|
|
.core = &ths7303_core_ops,
|
|
.video = &ths7303_video_ops,
|
|
};
|
|
|
|
static int ths7303_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct v4l2_subdev *sd;
|
|
v4l2_std_id std_id = V4L2_STD_NTSC;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
v4l_info(client, "chip found @ 0x%x (%s)\n",
|
|
client->addr << 1, client->adapter->name);
|
|
|
|
sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
|
|
if (sd == NULL)
|
|
return -ENOMEM;
|
|
|
|
v4l2_i2c_subdev_init(sd, client, &ths7303_ops);
|
|
|
|
return ths7303_setvalue(sd, std_id);
|
|
}
|
|
|
|
static int ths7303_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 ths7303_id[] = {
|
|
{"ths7303", 0},
|
|
{},
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, ths7303_id);
|
|
|
|
static struct i2c_driver ths7303_driver = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ths7303",
|
|
},
|
|
.probe = ths7303_probe,
|
|
.remove = ths7303_remove,
|
|
.id_table = ths7303_id,
|
|
};
|
|
|
|
static int __init ths7303_init(void)
|
|
{
|
|
return i2c_add_driver(&ths7303_driver);
|
|
}
|
|
|
|
static void __exit ths7303_exit(void)
|
|
{
|
|
i2c_del_driver(&ths7303_driver);
|
|
}
|
|
|
|
module_init(ths7303_init);
|
|
module_exit(ths7303_exit);
|
|
|