1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) 2005-2006 Micronas USA Inc.
4*4882a593Smuzhiyun */
5*4882a593Smuzhiyun
6*4882a593Smuzhiyun #include <linux/module.h>
7*4882a593Smuzhiyun #include <linux/init.h>
8*4882a593Smuzhiyun #include <linux/i2c.h>
9*4882a593Smuzhiyun #include <linux/videodev2.h>
10*4882a593Smuzhiyun #include <media/v4l2-device.h>
11*4882a593Smuzhiyun #include <media/i2c/uda1342.h>
12*4882a593Smuzhiyun #include <linux/slab.h>
13*4882a593Smuzhiyun
write_reg(struct i2c_client * client,int reg,int value)14*4882a593Smuzhiyun static int write_reg(struct i2c_client *client, int reg, int value)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun /* UDA1342 wants MSB first, but SMBus sends LSB first */
17*4882a593Smuzhiyun i2c_smbus_write_word_data(client, reg, swab16(value));
18*4882a593Smuzhiyun return 0;
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun
uda1342_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)21*4882a593Smuzhiyun static int uda1342_s_routing(struct v4l2_subdev *sd,
22*4882a593Smuzhiyun u32 input, u32 output, u32 config)
23*4882a593Smuzhiyun {
24*4882a593Smuzhiyun struct i2c_client *client = v4l2_get_subdevdata(sd);
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun switch (input) {
27*4882a593Smuzhiyun case UDA1342_IN1:
28*4882a593Smuzhiyun write_reg(client, 0x00, 0x1241); /* select input 1 */
29*4882a593Smuzhiyun break;
30*4882a593Smuzhiyun case UDA1342_IN2:
31*4882a593Smuzhiyun write_reg(client, 0x00, 0x1441); /* select input 2 */
32*4882a593Smuzhiyun break;
33*4882a593Smuzhiyun default:
34*4882a593Smuzhiyun v4l2_err(sd, "input %d not supported\n", input);
35*4882a593Smuzhiyun break;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun return 0;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
41*4882a593Smuzhiyun .s_routing = uda1342_s_routing,
42*4882a593Smuzhiyun };
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun static const struct v4l2_subdev_ops uda1342_ops = {
45*4882a593Smuzhiyun .audio = &uda1342_audio_ops,
46*4882a593Smuzhiyun };
47*4882a593Smuzhiyun
uda1342_probe(struct i2c_client * client,const struct i2c_device_id * id)48*4882a593Smuzhiyun static int uda1342_probe(struct i2c_client *client,
49*4882a593Smuzhiyun const struct i2c_device_id *id)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun struct i2c_adapter *adapter = client->adapter;
52*4882a593Smuzhiyun struct v4l2_subdev *sd;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
55*4882a593Smuzhiyun return -ENODEV;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
58*4882a593Smuzhiyun client->addr, adapter->name);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
61*4882a593Smuzhiyun if (sd == NULL)
62*4882a593Smuzhiyun return -ENOMEM;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun v4l2_i2c_subdev_init(sd, client, &uda1342_ops);
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun write_reg(client, 0x00, 0x8000); /* reset registers */
67*4882a593Smuzhiyun write_reg(client, 0x00, 0x1241); /* select input 1 */
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun v4l_info(client, "chip found @ 0x%02x (%s)\n",
70*4882a593Smuzhiyun client->addr << 1, client->adapter->name);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun return 0;
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
uda1342_remove(struct i2c_client * client)75*4882a593Smuzhiyun static int uda1342_remove(struct i2c_client *client)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun struct v4l2_subdev *sd = i2c_get_clientdata(client);
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun v4l2_device_unregister_subdev(sd);
80*4882a593Smuzhiyun return 0;
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun static const struct i2c_device_id uda1342_id[] = {
84*4882a593Smuzhiyun { "uda1342", 0 },
85*4882a593Smuzhiyun { }
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun MODULE_DEVICE_TABLE(i2c, uda1342_id);
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct i2c_driver uda1342_driver = {
90*4882a593Smuzhiyun .driver = {
91*4882a593Smuzhiyun .name = "uda1342",
92*4882a593Smuzhiyun },
93*4882a593Smuzhiyun .probe = uda1342_probe,
94*4882a593Smuzhiyun .remove = uda1342_remove,
95*4882a593Smuzhiyun .id_table = uda1342_id,
96*4882a593Smuzhiyun };
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun module_i2c_driver(uda1342_driver);
99*4882a593Smuzhiyun
100*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
101