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1 | /* |
2 | * ac97.c -- ALSA Soc AC97 codec support | |
3 | * | |
4 | * Copyright 2005 Wolfson Microelectronics PLC. | |
d331124d | 5 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
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6 | * |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2 of the License, or (at your | |
10 | * option) any later version. | |
11 | * | |
dbc6b6ad RP |
12 | * Generic AC97 support. |
13 | */ | |
14 | ||
15 | #include <linux/init.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
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17 | #include <linux/kernel.h> |
18 | #include <linux/device.h> | |
da155d5b | 19 | #include <linux/module.h> |
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20 | #include <sound/core.h> |
21 | #include <sound/pcm.h> | |
22 | #include <sound/ac97_codec.h> | |
23 | #include <sound/initval.h> | |
24 | #include <sound/soc.h> | |
25 | ||
dee89c4d MB |
26 | static int ac97_prepare(struct snd_pcm_substream *substream, |
27 | struct snd_soc_dai *dai) | |
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28 | { |
29 | struct snd_pcm_runtime *runtime = substream->runtime; | |
30 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 31 | struct snd_soc_codec *codec = rtd->codec; |
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32 | |
33 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
34 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
35 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | |
36 | } | |
37 | ||
5a8ec343 | 38 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
39 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
40 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 41 | |
85e7652d | 42 | static const struct snd_soc_dai_ops ac97_dai_ops = { |
6335d055 EM |
43 | .prepare = ac97_prepare, |
44 | }; | |
45 | ||
f0fba2ad LG |
46 | static struct snd_soc_dai_driver ac97_dai = { |
47 | .name = "ac97-hifi", | |
3ba9e10a | 48 | .ac97_control = 1, |
dbc6b6ad RP |
49 | .playback = { |
50 | .stream_name = "AC97 Playback", | |
51 | .channels_min = 1, | |
5a8ec343 LG |
52 | .channels_max = 2, |
53 | .rates = STD_AC97_RATES, | |
33f503c9 | 54 | .formats = SND_SOC_STD_AC97_FMTS,}, |
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55 | .capture = { |
56 | .stream_name = "AC97 Capture", | |
57 | .channels_min = 1, | |
5a8ec343 LG |
58 | .channels_max = 2, |
59 | .rates = STD_AC97_RATES, | |
33f503c9 | 60 | .formats = SND_SOC_STD_AC97_FMTS,}, |
6335d055 | 61 | .ops = &ac97_dai_ops, |
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62 | }; |
63 | ||
64 | static unsigned int ac97_read(struct snd_soc_codec *codec, | |
65 | unsigned int reg) | |
66 | { | |
67 | return soc_ac97_ops.read(codec->ac97, reg); | |
68 | } | |
69 | ||
70 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | |
71 | unsigned int val) | |
72 | { | |
73 | soc_ac97_ops.write(codec->ac97, reg, val); | |
74 | return 0; | |
75 | } | |
76 | ||
f0fba2ad | 77 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
dbc6b6ad | 78 | { |
dbc6b6ad RP |
79 | struct snd_ac97_bus *ac97_bus; |
80 | struct snd_ac97_template ac97_template; | |
f0fba2ad | 81 | int ret; |
dbc6b6ad | 82 | |
dbc6b6ad | 83 | /* add codec as bus device for standard ac97 */ |
f0fba2ad | 84 | ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
24c053e7 | 85 | if (ret < 0) |
f0fba2ad | 86 | return ret; |
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87 | |
88 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
89 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 90 | if (ret < 0) |
f0fba2ad | 91 | return ret; |
fb48e3c6 | 92 | |
dbc6b6ad | 93 | return 0; |
dbc6b6ad RP |
94 | } |
95 | ||
f0fba2ad | 96 | static int ac97_soc_remove(struct snd_soc_codec *codec) |
dbc6b6ad | 97 | { |
dbc6b6ad RP |
98 | return 0; |
99 | } | |
100 | ||
3f775987 | 101 | #ifdef CONFIG_PM |
84b315ee | 102 | static int ac97_soc_suspend(struct snd_soc_codec *codec) |
3f775987 | 103 | { |
f0fba2ad | 104 | snd_ac97_suspend(codec->ac97); |
3f775987 ML |
105 | |
106 | return 0; | |
107 | } | |
108 | ||
f0fba2ad | 109 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
3f775987 | 110 | { |
f0fba2ad | 111 | snd_ac97_resume(codec->ac97); |
3f775987 ML |
112 | |
113 | return 0; | |
114 | } | |
115 | #else | |
116 | #define ac97_soc_suspend NULL | |
117 | #define ac97_soc_resume NULL | |
118 | #endif | |
119 | ||
f0fba2ad | 120 | static struct snd_soc_codec_driver soc_codec_dev_ac97 = { |
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121 | .write = ac97_write, |
122 | .read = ac97_read, | |
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123 | .probe = ac97_soc_probe, |
124 | .remove = ac97_soc_remove, | |
3f775987 ML |
125 | .suspend = ac97_soc_suspend, |
126 | .resume = ac97_soc_resume, | |
dbc6b6ad | 127 | }; |
f0fba2ad LG |
128 | |
129 | static __devinit int ac97_probe(struct platform_device *pdev) | |
130 | { | |
131 | return snd_soc_register_codec(&pdev->dev, | |
132 | &soc_codec_dev_ac97, &ac97_dai, 1); | |
133 | } | |
134 | ||
135 | static int __devexit ac97_remove(struct platform_device *pdev) | |
136 | { | |
137 | snd_soc_unregister_codec(&pdev->dev); | |
138 | return 0; | |
139 | } | |
140 | ||
141 | static struct platform_driver ac97_codec_driver = { | |
142 | .driver = { | |
591796b8 MB |
143 | .name = "ac97-codec", |
144 | .owner = THIS_MODULE, | |
f0fba2ad LG |
145 | }, |
146 | ||
147 | .probe = ac97_probe, | |
148 | .remove = __devexit_p(ac97_remove), | |
149 | }; | |
150 | ||
5bbcc3c0 | 151 | module_platform_driver(ac97_codec_driver); |
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152 | |
153 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
154 | MODULE_AUTHOR("Liam Girdwood"); | |
155 | MODULE_LICENSE("GPL"); | |
0afe6b90 | 156 | MODULE_ALIAS("platform:ac97-codec"); |