99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-only
|
||
|
|
/*
|
||
|
|
* Copyright (C) 2005-2006 Micronas USA Inc.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#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)
|
||
|
|
{
|
||
|
|
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 void uda1342_remove(struct i2c_client *client)
|
||
|
|
{
|
||
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
||
|
|
|
||
|
|
v4l2_device_unregister_subdev(sd);
|
||
|
|
}
|
||
|
|
|
||
|
|
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_new = uda1342_probe,
|
||
|
|
.remove = uda1342_remove,
|
||
|
|
.id_table = uda1342_id,
|
||
|
|
};
|
||
|
|
|
||
|
|
module_i2c_driver(uda1342_driver);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|