1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* 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/version.h>
#include <linux/i2c.h>
#include <linux/videodev.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");
|
