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dbc6b6ad RP |
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> | |
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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 | ||
dee89c4d MB |
25 | static int ac97_prepare(struct snd_pcm_substream *substream, |
26 | struct snd_soc_dai *dai) | |
dbc6b6ad RP |
27 | { |
28 | struct snd_pcm_runtime *runtime = substream->runtime; | |
29 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 30 | struct snd_soc_codec *codec = rtd->codec; |
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31 | |
32 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
33 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
34 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | |
35 | } | |
36 | ||
5a8ec343 | 37 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
38 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
39 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 40 | |
6335d055 EM |
41 | static struct snd_soc_dai_ops ac97_dai_ops = { |
42 | .prepare = ac97_prepare, | |
43 | }; | |
44 | ||
f0fba2ad LG |
45 | static struct snd_soc_dai_driver ac97_dai = { |
46 | .name = "ac97-hifi", | |
3ba9e10a | 47 | .ac97_control = 1, |
dbc6b6ad RP |
48 | .playback = { |
49 | .stream_name = "AC97 Playback", | |
50 | .channels_min = 1, | |
5a8ec343 LG |
51 | .channels_max = 2, |
52 | .rates = STD_AC97_RATES, | |
33f503c9 | 53 | .formats = SND_SOC_STD_AC97_FMTS,}, |
dbc6b6ad RP |
54 | .capture = { |
55 | .stream_name = "AC97 Capture", | |
56 | .channels_min = 1, | |
5a8ec343 LG |
57 | .channels_max = 2, |
58 | .rates = STD_AC97_RATES, | |
33f503c9 | 59 | .formats = SND_SOC_STD_AC97_FMTS,}, |
6335d055 | 60 | .ops = &ac97_dai_ops, |
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61 | }; |
62 | ||
63 | static unsigned int ac97_read(struct snd_soc_codec *codec, | |
64 | unsigned int reg) | |
65 | { | |
66 | return soc_ac97_ops.read(codec->ac97, reg); | |
67 | } | |
68 | ||
69 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | |
70 | unsigned int val) | |
71 | { | |
72 | soc_ac97_ops.write(codec->ac97, reg, val); | |
73 | return 0; | |
74 | } | |
75 | ||
f0fba2ad | 76 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
dbc6b6ad | 77 | { |
dbc6b6ad RP |
78 | struct snd_ac97_bus *ac97_bus; |
79 | struct snd_ac97_template ac97_template; | |
f0fba2ad | 80 | int ret; |
dbc6b6ad | 81 | |
dbc6b6ad | 82 | /* add codec as bus device for standard ac97 */ |
f0fba2ad | 83 | ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
24c053e7 | 84 | if (ret < 0) |
f0fba2ad | 85 | return ret; |
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86 | |
87 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
88 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 89 | if (ret < 0) |
f0fba2ad | 90 | return ret; |
fb48e3c6 | 91 | |
dbc6b6ad | 92 | return 0; |
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93 | } |
94 | ||
f0fba2ad | 95 | static int ac97_soc_remove(struct snd_soc_codec *codec) |
dbc6b6ad | 96 | { |
dbc6b6ad RP |
97 | return 0; |
98 | } | |
99 | ||
3f775987 | 100 | #ifdef CONFIG_PM |
f0fba2ad | 101 | static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) |
3f775987 | 102 | { |
f0fba2ad | 103 | snd_ac97_suspend(codec->ac97); |
3f775987 ML |
104 | |
105 | return 0; | |
106 | } | |
107 | ||
f0fba2ad | 108 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
3f775987 | 109 | { |
f0fba2ad | 110 | snd_ac97_resume(codec->ac97); |
3f775987 ML |
111 | |
112 | return 0; | |
113 | } | |
114 | #else | |
115 | #define ac97_soc_suspend NULL | |
116 | #define ac97_soc_resume NULL | |
117 | #endif | |
118 | ||
f0fba2ad | 119 | static struct snd_soc_codec_driver soc_codec_dev_ac97 = { |
591796b8 MB |
120 | .write = ac97_write, |
121 | .read = ac97_read, | |
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122 | .probe = ac97_soc_probe, |
123 | .remove = ac97_soc_remove, | |
3f775987 ML |
124 | .suspend = ac97_soc_suspend, |
125 | .resume = ac97_soc_resume, | |
dbc6b6ad | 126 | }; |
f0fba2ad LG |
127 | |
128 | static __devinit int ac97_probe(struct platform_device *pdev) | |
129 | { | |
130 | return snd_soc_register_codec(&pdev->dev, | |
131 | &soc_codec_dev_ac97, &ac97_dai, 1); | |
132 | } | |
133 | ||
134 | static int __devexit ac97_remove(struct platform_device *pdev) | |
135 | { | |
136 | snd_soc_unregister_codec(&pdev->dev); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | static struct platform_driver ac97_codec_driver = { | |
141 | .driver = { | |
591796b8 MB |
142 | .name = "ac97-codec", |
143 | .owner = THIS_MODULE, | |
f0fba2ad LG |
144 | }, |
145 | ||
146 | .probe = ac97_probe, | |
147 | .remove = __devexit_p(ac97_remove), | |
148 | }; | |
149 | ||
150 | static int __init ac97_init(void) | |
151 | { | |
152 | return platform_driver_register(&ac97_codec_driver); | |
153 | } | |
154 | module_init(ac97_init); | |
155 | ||
156 | static void __exit ac97_exit(void) | |
157 | { | |
158 | platform_driver_unregister(&ac97_codec_driver); | |
159 | } | |
160 | module_exit(ac97_exit); | |
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161 | |
162 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
163 | MODULE_AUTHOR("Liam Girdwood"); | |
164 | MODULE_LICENSE("GPL"); | |
0afe6b90 | 165 | MODULE_ALIAS("platform:ac97-codec"); |