]>
Commit | Line | Data |
---|---|---|
866b8695 GKH |
1 | /* |
2 | * Copyright (C) 2005-2006 Micronas USA Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License (Version 2) as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program; if not, write to the Free Software Foundation, | |
15 | * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
866b8695 | 20 | #include <linux/i2c.h> |
df20d69e | 21 | #include <linux/videodev2.h> |
866b8695 GKH |
22 | #include <media/tvaudio.h> |
23 | #include <media/v4l2-common.h> | |
24 | ||
25 | #include "wis-i2c.h" | |
26 | ||
27 | static int write_reg(struct i2c_client *client, int reg, int value) | |
28 | { | |
29 | /* UDA1342 wants MSB first, but SMBus sends LSB first */ | |
30 | i2c_smbus_write_word_data(client, reg, swab16(value)); | |
31 | return 0; | |
32 | } | |
33 | ||
34 | static int wis_uda1342_command(struct i2c_client *client, | |
35 | unsigned int cmd, void *arg) | |
36 | { | |
37 | switch (cmd) { | |
38 | case VIDIOC_S_AUDIO: | |
39 | { | |
40 | int *inp = arg; | |
41 | ||
42 | switch (*inp) { | |
43 | case TVAUDIO_INPUT_TUNER: | |
44 | write_reg(client, 0x00, 0x1441); /* select input 2 */ | |
45 | break; | |
46 | case TVAUDIO_INPUT_EXTERN: | |
47 | write_reg(client, 0x00, 0x1241); /* select input 1 */ | |
48 | break; | |
49 | default: | |
50 | printk(KERN_ERR "wis-uda1342: input %d not supported\n", | |
51 | *inp); | |
52 | break; | |
53 | } | |
54 | break; | |
55 | } | |
56 | default: | |
57 | break; | |
58 | } | |
59 | return 0; | |
60 | } | |
61 | ||
7400516a JD |
62 | static int wis_uda1342_probe(struct i2c_client *client, |
63 | const struct i2c_device_id *id) | |
866b8695 | 64 | { |
7400516a | 65 | struct i2c_adapter *adapter = client->adapter; |
866b8695 GKH |
66 | |
67 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) | |
7400516a | 68 | return -ENODEV; |
866b8695 GKH |
69 | |
70 | printk(KERN_DEBUG | |
71 | "wis-uda1342: initializing UDA1342 at address %d on %s\n", | |
7400516a | 72 | client->addr, adapter->name); |
866b8695 GKH |
73 | |
74 | write_reg(client, 0x00, 0x8000); /* reset registers */ | |
75 | write_reg(client, 0x00, 0x1241); /* select input 1 */ | |
76 | ||
866b8695 GKH |
77 | return 0; |
78 | } | |
79 | ||
7400516a | 80 | static int wis_uda1342_remove(struct i2c_client *client) |
866b8695 | 81 | { |
866b8695 GKH |
82 | return 0; |
83 | } | |
84 | ||
7400516a JD |
85 | static struct i2c_device_id wis_uda1342_id[] = { |
86 | { "wis_uda1342", 0 }, | |
87 | { } | |
88 | }; | |
89 | ||
866b8695 GKH |
90 | static struct i2c_driver wis_uda1342_driver = { |
91 | .driver = { | |
92 | .name = "WIS UDA1342 I2C driver", | |
93 | }, | |
7400516a JD |
94 | .probe = wis_uda1342_probe, |
95 | .remove = wis_uda1342_remove, | |
866b8695 | 96 | .command = wis_uda1342_command, |
7400516a | 97 | .id_table = wis_uda1342_id, |
866b8695 GKH |
98 | }; |
99 | ||
100 | static int __init wis_uda1342_init(void) | |
101 | { | |
7400516a | 102 | return i2c_add_driver(&wis_uda1342_driver); |
866b8695 GKH |
103 | } |
104 | ||
105 | static void __exit wis_uda1342_cleanup(void) | |
106 | { | |
866b8695 GKH |
107 | i2c_del_driver(&wis_uda1342_driver); |
108 | } | |
109 | ||
110 | module_init(wis_uda1342_init); | |
111 | module_exit(wis_uda1342_cleanup); | |
112 | ||
113 | MODULE_LICENSE("GPL v2"); |