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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/*
* Copyright 2008-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file bluetooth.c
* @brief Driver for bluetooth PCM interface
*
* @ingroup Sound
*/
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#define BLUETOOTH_RATES SNDRV_PCM_RATE_8000
#define BLUETOOTH_FORMATS SNDRV_PCM_FMTBIT_S16_LE
struct snd_soc_dai bt_dai = {
.name = "bluetooth",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = BLUETOOTH_RATES,
.formats = BLUETOOTH_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = BLUETOOTH_RATES,
.formats = BLUETOOTH_FORMATS,
},
};
EXPORT_SYMBOL_GPL(bt_dai);
static int bt_init(struct snd_soc_device *socdev)
{
struct snd_soc_codec *codec = socdev->card->codec;
int ret = 0;
codec->name = "bluetooth";
codec->owner = THIS_MODULE;
codec->dai = &bt_dai;
codec->num_dai = 1;
snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
if (ret < 0) {
pr_err("failed to create bluetooth pcms\n");
return ret;
}
ret = snd_soc_init_card(socdev);
strcpy(codec->card->id, "bluetooth");
if (ret < 0) {
pr_err("bluetooth: failed to register card\n");
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
return ret;
}
return 0;
}
static struct snd_soc_device *bt_socdev;
static int bt_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
int ret = 0;
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
if (codec == NULL)
return -ENOMEM;
socdev->card->codec = codec;
mutex_init(&codec->mutex);
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
bt_socdev = socdev;
ret = bt_init(socdev);
if (ret < 0) {
pr_err("Bluetooth codec initialisation failed\n");
kfree(codec);
}
return ret;
}
/* power down chip */
static int bt_remove(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
kfree(codec);
return 0;
}
static int bt_suspend(struct platform_device *pdev, pm_message_t state)
{
return 0;
}
static int bt_resume(struct platform_device *pdev)
{
return 0;
}
struct snd_soc_codec_device soc_codec_dev_bt = {
.probe = bt_probe,
.remove = bt_remove,
.suspend = bt_suspend,
.resume = bt_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_bt);
static int __init bluetooth_modinit(void)
{
return snd_soc_register_dai(&bt_dai);
}
module_init(bluetooth_modinit);
static void __exit bluetooth_exit(void)
{
snd_soc_unregister_dai(&bt_dai);
}
module_exit(bluetooth_exit);
MODULE_DESCRIPTION("ASoC bluetooth codec driver");
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_LICENSE("GPL");
|
