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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 | ||
35 | struct 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 | }; | |
45 | EXPORT_SYMBOL_GPL(wm8727_dai); | |
46 | ||
47 | static int wm8727_soc_probe(struct platform_device *pdev) | |
48 | { | |
49 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
50 | struct snd_soc_codec *codec; | |
51 | int ret = 0; | |
52 | ||
53 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
54 | if (codec == NULL) | |
55 | return -ENOMEM; | |
56 | mutex_init(&codec->mutex); | |
57 | codec->name = "WM8727"; | |
58 | codec->owner = THIS_MODULE; | |
59 | codec->dai = &wm8727_dai; | |
60 | codec->num_dai = 1; | |
61 | socdev->card->codec = codec; | |
62 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
63 | INIT_LIST_HEAD(&codec->dapm_paths); | |
64 | ||
65 | /* register pcms */ | |
66 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
67 | if (ret < 0) { | |
68 | printk(KERN_ERR "wm8727: failed to create pcms\n"); | |
69 | goto pcm_err; | |
70 | } | |
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71 | |
72 | return ret; | |
73 | ||
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74 | pcm_err: |
75 | kfree(socdev->card->codec); | |
76 | socdev->card->codec = NULL; | |
77 | return ret; | |
78 | } | |
79 | ||
80 | static int wm8727_soc_remove(struct platform_device *pdev) | |
81 | { | |
82 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
83 | struct snd_soc_codec *codec = socdev->card->codec; | |
84 | ||
85 | if (codec == NULL) | |
86 | return 0; | |
87 | snd_soc_free_pcms(socdev); | |
88 | kfree(codec); | |
89 | return 0; | |
90 | } | |
91 | ||
92 | struct snd_soc_codec_device soc_codec_dev_wm8727 = { | |
93 | .probe = wm8727_soc_probe, | |
94 | .remove = wm8727_soc_remove, | |
95 | }; | |
96 | EXPORT_SYMBOL_GPL(soc_codec_dev_wm8727); | |
97 | ||
98 | ||
99 | static __devinit int wm8727_platform_probe(struct platform_device *pdev) | |
100 | { | |
101 | wm8727_dai.dev = &pdev->dev; | |
102 | return snd_soc_register_dai(&wm8727_dai); | |
103 | } | |
104 | ||
105 | static int __devexit wm8727_platform_remove(struct platform_device *pdev) | |
106 | { | |
107 | snd_soc_unregister_dai(&wm8727_dai); | |
108 | return 0; | |
109 | } | |
110 | ||
529697c5 | 111 | static struct platform_driver wm8727_codec_driver = { |
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112 | .driver = { |
113 | .name = "wm8727-codec", | |
114 | .owner = THIS_MODULE, | |
115 | }, | |
116 | ||
117 | .probe = wm8727_platform_probe, | |
118 | .remove = __devexit_p(wm8727_platform_remove), | |
119 | }; | |
120 | ||
121 | static int __init wm8727_init(void) | |
122 | { | |
123 | return platform_driver_register(&wm8727_codec_driver); | |
124 | } | |
125 | module_init(wm8727_init); | |
126 | ||
127 | static void __exit wm8727_exit(void) | |
128 | { | |
129 | platform_driver_unregister(&wm8727_codec_driver); | |
130 | } | |
131 | module_exit(wm8727_exit); | |
132 | ||
133 | MODULE_DESCRIPTION("ASoC wm8727 driver"); | |
134 | MODULE_AUTHOR("Neil Jones"); | |
135 | MODULE_LICENSE("GPL"); |