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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> |
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; |
358a8bb5 | 40 | struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); |
dbc6b6ad RP |
41 | |
42 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
43 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
358a8bb5 | 44 | return snd_ac97_set_rate(ac97, reg, substream->runtime->rate); |
dbc6b6ad RP |
45 | } |
46 | ||
5a8ec343 | 47 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
48 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
49 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 50 | |
85e7652d | 51 | static const struct snd_soc_dai_ops ac97_dai_ops = { |
6335d055 EM |
52 | .prepare = ac97_prepare, |
53 | }; | |
54 | ||
f0fba2ad LG |
55 | static struct snd_soc_dai_driver ac97_dai = { |
56 | .name = "ac97-hifi", | |
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 | ||
f0fba2ad | 72 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
dbc6b6ad | 73 | { |
358a8bb5 | 74 | struct snd_ac97 *ac97; |
dbc6b6ad RP |
75 | struct snd_ac97_bus *ac97_bus; |
76 | struct snd_ac97_template ac97_template; | |
f0fba2ad | 77 | int ret; |
dbc6b6ad | 78 | |
dbc6b6ad | 79 | /* add codec as bus device for standard ac97 */ |
00200107 LPC |
80 | ret = snd_ac97_bus(codec->component.card->snd_card, 0, soc_ac97_ops, |
81 | NULL, &ac97_bus); | |
24c053e7 | 82 | if (ret < 0) |
f0fba2ad | 83 | return ret; |
dbc6b6ad RP |
84 | |
85 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
358a8bb5 | 86 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97); |
24c053e7 | 87 | if (ret < 0) |
f0fba2ad | 88 | return ret; |
fb48e3c6 | 89 | |
358a8bb5 LPC |
90 | snd_soc_codec_set_drvdata(codec, ac97); |
91 | ||
dbc6b6ad | 92 | return 0; |
dbc6b6ad RP |
93 | } |
94 | ||
3f775987 | 95 | #ifdef CONFIG_PM |
84b315ee | 96 | static int ac97_soc_suspend(struct snd_soc_codec *codec) |
3f775987 | 97 | { |
358a8bb5 LPC |
98 | struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); |
99 | ||
100 | snd_ac97_suspend(ac97); | |
3f775987 ML |
101 | |
102 | return 0; | |
103 | } | |
104 | ||
f0fba2ad | 105 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
3f775987 | 106 | { |
358a8bb5 LPC |
107 | |
108 | struct snd_ac97 *ac97 = snd_soc_codec_get_drvdata(codec); | |
109 | ||
110 | snd_ac97_resume(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 = { |
dbc6b6ad | 120 | .probe = ac97_soc_probe, |
3f775987 ML |
121 | .suspend = ac97_soc_suspend, |
122 | .resume = ac97_soc_resume, | |
d2a369cb MB |
123 | |
124 | .dapm_widgets = ac97_widgets, | |
125 | .num_dapm_widgets = ARRAY_SIZE(ac97_widgets), | |
126 | .dapm_routes = ac97_routes, | |
127 | .num_dapm_routes = ARRAY_SIZE(ac97_routes), | |
dbc6b6ad | 128 | }; |
f0fba2ad | 129 | |
7a79e94e | 130 | static int ac97_probe(struct platform_device *pdev) |
f0fba2ad LG |
131 | { |
132 | return snd_soc_register_codec(&pdev->dev, | |
133 | &soc_codec_dev_ac97, &ac97_dai, 1); | |
134 | } | |
135 | ||
7a79e94e | 136 | static int ac97_remove(struct platform_device *pdev) |
f0fba2ad LG |
137 | { |
138 | snd_soc_unregister_codec(&pdev->dev); | |
139 | return 0; | |
140 | } | |
141 | ||
142 | static struct platform_driver ac97_codec_driver = { | |
143 | .driver = { | |
591796b8 MB |
144 | .name = "ac97-codec", |
145 | .owner = THIS_MODULE, | |
f0fba2ad LG |
146 | }, |
147 | ||
148 | .probe = ac97_probe, | |
7a79e94e | 149 | .remove = ac97_remove, |
f0fba2ad LG |
150 | }; |
151 | ||
5bbcc3c0 | 152 | module_platform_driver(ac97_codec_driver); |
dbc6b6ad RP |
153 | |
154 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
155 | MODULE_AUTHOR("Liam Girdwood"); | |
156 | MODULE_LICENSE("GPL"); | |
0afe6b90 | 157 | MODULE_ALIAS("platform:ac97-codec"); |