Commit | Line | Data |
---|---|---|
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> |
dbc6b6ad RP |
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> |
dbc6b6ad RP |
17 | #include <linux/kernel.h> |
18 | #include <linux/device.h> | |
da155d5b | 19 | #include <linux/module.h> |
dbc6b6ad RP |
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 | ||
d2a369cb MB |
26 | static const struct snd_soc_dapm_widget ac97_widgets[] = { |
27 | SND_SOC_DAPM_INPUT("RX"), | |
28 | SND_SOC_DAPM_OUTPUT("TX"), | |
29 | }; | |
30 | ||
31 | static const struct snd_soc_dapm_route ac97_routes[] = { | |
32 | { "AC97 Capture", NULL, "RX" }, | |
33 | { "TX", NULL, "AC97 Playback" }, | |
34 | }; | |
35 | ||
dee89c4d MB |
36 | static int ac97_prepare(struct snd_pcm_substream *substream, |
37 | struct snd_soc_dai *dai) | |
dbc6b6ad | 38 | { |
e6968a17 | 39 | struct snd_soc_codec *codec = dai->codec; |
dbc6b6ad RP |
40 | |
41 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
42 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
7a0a289c | 43 | return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate); |
dbc6b6ad RP |
44 | } |
45 | ||
5a8ec343 | 46 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
47 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
48 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 49 | |
85e7652d | 50 | static const struct snd_soc_dai_ops ac97_dai_ops = { |
6335d055 EM |
51 | .prepare = ac97_prepare, |
52 | }; | |
53 | ||
f0fba2ad LG |
54 | static struct snd_soc_dai_driver ac97_dai = { |
55 | .name = "ac97-hifi", | |
3ba9e10a | 56 | .ac97_control = 1, |
dbc6b6ad RP |
57 | .playback = { |
58 | .stream_name = "AC97 Playback", | |
59 | .channels_min = 1, | |
5a8ec343 LG |
60 | .channels_max = 2, |
61 | .rates = STD_AC97_RATES, | |
33f503c9 | 62 | .formats = SND_SOC_STD_AC97_FMTS,}, |
dbc6b6ad RP |
63 | .capture = { |
64 | .stream_name = "AC97 Capture", | |
65 | .channels_min = 1, | |
5a8ec343 LG |
66 | .channels_max = 2, |
67 | .rates = STD_AC97_RATES, | |
33f503c9 | 68 | .formats = SND_SOC_STD_AC97_FMTS,}, |
6335d055 | 69 | .ops = &ac97_dai_ops, |
dbc6b6ad RP |
70 | }; |
71 | ||
72 | static unsigned int ac97_read(struct snd_soc_codec *codec, | |
73 | unsigned int reg) | |
74 | { | |
b047e1cc | 75 | return soc_ac97_ops->read(codec->ac97, reg); |
dbc6b6ad RP |
76 | } |
77 | ||
78 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | |
79 | unsigned int val) | |
80 | { | |
b047e1cc | 81 | soc_ac97_ops->write(codec->ac97, reg, val); |
dbc6b6ad RP |
82 | return 0; |
83 | } | |
84 | ||
f0fba2ad | 85 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
dbc6b6ad | 86 | { |
dbc6b6ad RP |
87 | struct snd_ac97_bus *ac97_bus; |
88 | struct snd_ac97_template ac97_template; | |
f0fba2ad | 89 | int ret; |
dbc6b6ad | 90 | |
dbc6b6ad | 91 | /* add codec as bus device for standard ac97 */ |
b047e1cc MB |
92 | ret = snd_ac97_bus(codec->card->snd_card, 0, soc_ac97_ops, NULL, |
93 | &ac97_bus); | |
24c053e7 | 94 | if (ret < 0) |
f0fba2ad | 95 | return ret; |
dbc6b6ad RP |
96 | |
97 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
98 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 99 | if (ret < 0) |
f0fba2ad | 100 | return ret; |
fb48e3c6 | 101 | |
dbc6b6ad | 102 | return 0; |
dbc6b6ad RP |
103 | } |
104 | ||
3f775987 | 105 | #ifdef CONFIG_PM |
84b315ee | 106 | static int ac97_soc_suspend(struct snd_soc_codec *codec) |
3f775987 | 107 | { |
f0fba2ad | 108 | snd_ac97_suspend(codec->ac97); |
3f775987 ML |
109 | |
110 | return 0; | |
111 | } | |
112 | ||
f0fba2ad | 113 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
3f775987 | 114 | { |
f0fba2ad | 115 | snd_ac97_resume(codec->ac97); |
3f775987 ML |
116 | |
117 | return 0; | |
118 | } | |
119 | #else | |
120 | #define ac97_soc_suspend NULL | |
121 | #define ac97_soc_resume NULL | |
122 | #endif | |
123 | ||
f0fba2ad | 124 | static struct snd_soc_codec_driver soc_codec_dev_ac97 = { |
591796b8 MB |
125 | .write = ac97_write, |
126 | .read = ac97_read, | |
dbc6b6ad | 127 | .probe = ac97_soc_probe, |
3f775987 ML |
128 | .suspend = ac97_soc_suspend, |
129 | .resume = ac97_soc_resume, | |
d2a369cb MB |
130 | |
131 | .dapm_widgets = ac97_widgets, | |
132 | .num_dapm_widgets = ARRAY_SIZE(ac97_widgets), | |
133 | .dapm_routes = ac97_routes, | |
134 | .num_dapm_routes = ARRAY_SIZE(ac97_routes), | |
dbc6b6ad | 135 | }; |
f0fba2ad | 136 | |
7a79e94e | 137 | static int ac97_probe(struct platform_device *pdev) |
f0fba2ad LG |
138 | { |
139 | return snd_soc_register_codec(&pdev->dev, | |
140 | &soc_codec_dev_ac97, &ac97_dai, 1); | |
141 | } | |
142 | ||
7a79e94e | 143 | static int ac97_remove(struct platform_device *pdev) |
f0fba2ad LG |
144 | { |
145 | snd_soc_unregister_codec(&pdev->dev); | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static struct platform_driver ac97_codec_driver = { | |
150 | .driver = { | |
591796b8 MB |
151 | .name = "ac97-codec", |
152 | .owner = THIS_MODULE, | |
f0fba2ad LG |
153 | }, |
154 | ||
155 | .probe = ac97_probe, | |
7a79e94e | 156 | .remove = ac97_remove, |
f0fba2ad LG |
157 | }; |
158 | ||
5bbcc3c0 | 159 | module_platform_driver(ac97_codec_driver); |
dbc6b6ad RP |
160 | |
161 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
162 | MODULE_AUTHOR("Liam Girdwood"); | |
163 | MODULE_LICENSE("GPL"); | |
0afe6b90 | 164 | MODULE_ALIAS("platform:ac97-codec"); |