Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[deliverable/linux.git] / sound / soc / codecs / wm8727.c
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1/*
2 * wm8727.c
3 *
4 * Created on: 15-Oct-2009
5 * Author: neil.jones@imgtec.com
6 *
7 * Copyright (C) 2009 Imagination Technologies Ltd.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 */
14
15#include <linux/init.h>
16#include <linux/module.h>
17#include <linux/kernel.h>
18#include <linux/device.h>
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/ac97_codec.h>
22#include <sound/initval.h>
23#include <sound/soc.h>
24
25#include "wm8727.h"
26/*
27 * Note this is a simple chip with no configuration interface, sample rate is
28 * determined automatically by examining the Master clock and Bit clock ratios
29 */
30#define WM8727_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
31 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\
32 SNDRV_PCM_RATE_192000)
33
34
35struct snd_soc_dai wm8727_dai = {
36 .name = "WM8727",
37 .playback = {
38 .stream_name = "Playback",
39 .channels_min = 2,
40 .channels_max = 2,
41 .rates = WM8727_RATES,
42 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
43 },
44};
45EXPORT_SYMBOL_GPL(wm8727_dai);
46
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47static struct snd_soc_codec *wm8727_codec;
48
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49static int wm8727_soc_probe(struct platform_device *pdev)
50{
51 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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52 int ret = 0;
53
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54 BUG_ON(!wm8727_codec);
55
56 socdev->card->codec = wm8727_codec;
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57
58 /* register pcms */
59 ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
60 if (ret < 0) {
61 printk(KERN_ERR "wm8727: failed to create pcms\n");
62 goto pcm_err;
63 }
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64
65 return ret;
66
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67pcm_err:
68 kfree(socdev->card->codec);
69 socdev->card->codec = NULL;
70 return ret;
71}
72
73static int wm8727_soc_remove(struct platform_device *pdev)
74{
75 struct snd_soc_device *socdev = platform_get_drvdata(pdev);
89933dee 76
89933dee 77 snd_soc_free_pcms(socdev);
cce2e9db 78
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79 return 0;
80}
81
82struct snd_soc_codec_device soc_codec_dev_wm8727 = {
83 .probe = wm8727_soc_probe,
84 .remove = wm8727_soc_remove,
85};
86EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727);
87
88
89static __devinit int wm8727_platform_probe(struct platform_device *pdev)
90{
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91 struct snd_soc_codec *codec;
92 int ret;
93
94 if (wm8727_codec) {
95 dev_err(&pdev->dev, "Another WM8727 is registered\n");
96 return -EBUSY;
97 }
98
99 codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
100 if (codec == NULL)
101 return -ENOMEM;
102 wm8727_codec = codec;
103
104 platform_set_drvdata(pdev, codec);
105
106 mutex_init(&codec->mutex);
107 codec->dev = &pdev->dev;
108 codec->name = "WM8727";
109 codec->owner = THIS_MODULE;
110 codec->dai = &wm8727_dai;
111 codec->num_dai = 1;
112 INIT_LIST_HEAD(&codec->dapm_widgets);
113 INIT_LIST_HEAD(&codec->dapm_paths);
114
89933dee 115 wm8727_dai.dev = &pdev->dev;
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116
117 ret = snd_soc_register_codec(codec);
118 if (ret != 0) {
119 dev_err(&pdev->dev, "Failed to register CODEC: %d\n", ret);
120 goto err;
121 }
122
123 ret = snd_soc_register_dai(&wm8727_dai);
124 if (ret != 0) {
125 dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
126 goto err_codec;
127 }
128
129err_codec:
130 snd_soc_unregister_codec(codec);
131err:
132 kfree(codec);
133 return ret;
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134}
135
136static int __devexit wm8727_platform_remove(struct platform_device *pdev)
137{
138 snd_soc_unregister_dai(&wm8727_dai);
cce2e9db 139 snd_soc_unregister_codec(platform_get_drvdata(pdev));
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140 return 0;
141}
142
529697c5 143static struct platform_driver wm8727_codec_driver = {
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144 .driver = {
145 .name = "wm8727-codec",
146 .owner = THIS_MODULE,
147 },
148
149 .probe = wm8727_platform_probe,
150 .remove = __devexit_p(wm8727_platform_remove),
151};
152
153static int __init wm8727_init(void)
154{
155 return platform_driver_register(&wm8727_codec_driver);
156}
157module_init(wm8727_init);
158
159static void __exit wm8727_exit(void)
160{
161 platform_driver_unregister(&wm8727_codec_driver);
162}
163module_exit(wm8727_exit);
164
165MODULE_DESCRIPTION("ASoC wm8727 driver");
166MODULE_AUTHOR("Neil Jones");
167MODULE_LICENSE("GPL");
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