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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> | |
dbc6b6ad RP |
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> | |
dbac7cb8 | 24 | #include "ac97.h" |
dbc6b6ad | 25 | |
5a8ec343 | 26 | #define AC97_VERSION "0.6" |
dbc6b6ad | 27 | |
dee89c4d MB |
28 | static int ac97_prepare(struct snd_pcm_substream *substream, |
29 | struct snd_soc_dai *dai) | |
dbc6b6ad RP |
30 | { |
31 | struct snd_pcm_runtime *runtime = substream->runtime; | |
32 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
33 | struct snd_soc_device *socdev = rtd->socdev; | |
6627a653 | 34 | struct snd_soc_codec *codec = socdev->card->codec; |
dbc6b6ad RP |
35 | |
36 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
37 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
38 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | |
39 | } | |
40 | ||
5a8ec343 | 41 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
42 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
43 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 44 | |
6335d055 EM |
45 | static struct snd_soc_dai_ops ac97_dai_ops = { |
46 | .prepare = ac97_prepare, | |
47 | }; | |
48 | ||
e550e17f | 49 | struct snd_soc_dai ac97_dai = { |
dbc6b6ad | 50 | .name = "AC97 HiFi", |
3ba9e10a | 51 | .ac97_control = 1, |
dbc6b6ad RP |
52 | .playback = { |
53 | .stream_name = "AC97 Playback", | |
54 | .channels_min = 1, | |
5a8ec343 LG |
55 | .channels_max = 2, |
56 | .rates = STD_AC97_RATES, | |
33f503c9 | 57 | .formats = SND_SOC_STD_AC97_FMTS,}, |
dbc6b6ad RP |
58 | .capture = { |
59 | .stream_name = "AC97 Capture", | |
60 | .channels_min = 1, | |
5a8ec343 LG |
61 | .channels_max = 2, |
62 | .rates = STD_AC97_RATES, | |
33f503c9 | 63 | .formats = SND_SOC_STD_AC97_FMTS,}, |
6335d055 | 64 | .ops = &ac97_dai_ops, |
dbc6b6ad | 65 | }; |
5d0cedee | 66 | EXPORT_SYMBOL_GPL(ac97_dai); |
dbc6b6ad RP |
67 | |
68 | static unsigned int ac97_read(struct snd_soc_codec *codec, | |
69 | unsigned int reg) | |
70 | { | |
71 | return soc_ac97_ops.read(codec->ac97, reg); | |
72 | } | |
73 | ||
74 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | |
75 | unsigned int val) | |
76 | { | |
77 | soc_ac97_ops.write(codec->ac97, reg, val); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | static int ac97_soc_probe(struct platform_device *pdev) | |
82 | { | |
83 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
84 | struct snd_soc_codec *codec; | |
85 | struct snd_ac97_bus *ac97_bus; | |
86 | struct snd_ac97_template ac97_template; | |
87 | int ret = 0; | |
88 | ||
89 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); | |
90 | ||
6627a653 MB |
91 | socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); |
92 | if (!socdev->card->codec) | |
dbc6b6ad | 93 | return -ENOMEM; |
6627a653 | 94 | codec = socdev->card->codec; |
dbc6b6ad RP |
95 | mutex_init(&codec->mutex); |
96 | ||
97 | codec->name = "AC97"; | |
98 | codec->owner = THIS_MODULE; | |
99 | codec->dai = &ac97_dai; | |
100 | codec->num_dai = 1; | |
101 | codec->write = ac97_write; | |
102 | codec->read = ac97_read; | |
103 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
104 | INIT_LIST_HEAD(&codec->dapm_paths); | |
105 | ||
ecbec242 ML |
106 | ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0); |
107 | if (ret < 0) { | |
108 | printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n"); | |
109 | goto err; | |
110 | } | |
111 | ||
dbc6b6ad RP |
112 | /* register pcms */ |
113 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
24c053e7 | 114 | if (ret < 0) |
dbc6b6ad RP |
115 | goto err; |
116 | ||
117 | /* add codec as bus device for standard ac97 */ | |
118 | ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); | |
24c053e7 | 119 | if (ret < 0) |
dbc6b6ad RP |
120 | goto bus_err; |
121 | ||
122 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
123 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 124 | if (ret < 0) |
dbc6b6ad RP |
125 | goto bus_err; |
126 | ||
dbc6b6ad RP |
127 | return 0; |
128 | ||
129 | bus_err: | |
130 | snd_soc_free_pcms(socdev); | |
131 | ||
132 | err: | |
6627a653 MB |
133 | kfree(socdev->card->codec); |
134 | socdev->card->codec = NULL; | |
dbc6b6ad RP |
135 | return ret; |
136 | } | |
137 | ||
138 | static int ac97_soc_remove(struct platform_device *pdev) | |
139 | { | |
140 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 141 | struct snd_soc_codec *codec = socdev->card->codec; |
dbc6b6ad | 142 | |
24c053e7 | 143 | if (!codec) |
dbc6b6ad RP |
144 | return 0; |
145 | ||
146 | snd_soc_free_pcms(socdev); | |
6627a653 | 147 | kfree(socdev->card->codec); |
dbc6b6ad RP |
148 | |
149 | return 0; | |
150 | } | |
151 | ||
3f775987 ML |
152 | #ifdef CONFIG_PM |
153 | static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg) | |
154 | { | |
155 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
156 | ||
6627a653 | 157 | snd_ac97_suspend(socdev->card->codec->ac97); |
3f775987 ML |
158 | |
159 | return 0; | |
160 | } | |
161 | ||
162 | static int ac97_soc_resume(struct platform_device *pdev) | |
163 | { | |
164 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
165 | ||
6627a653 | 166 | snd_ac97_resume(socdev->card->codec->ac97); |
3f775987 ML |
167 | |
168 | return 0; | |
169 | } | |
170 | #else | |
171 | #define ac97_soc_suspend NULL | |
172 | #define ac97_soc_resume NULL | |
173 | #endif | |
174 | ||
24c053e7 | 175 | struct snd_soc_codec_device soc_codec_dev_ac97 = { |
dbc6b6ad RP |
176 | .probe = ac97_soc_probe, |
177 | .remove = ac97_soc_remove, | |
3f775987 ML |
178 | .suspend = ac97_soc_suspend, |
179 | .resume = ac97_soc_resume, | |
dbc6b6ad | 180 | }; |
dbc6b6ad RP |
181 | EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); |
182 | ||
183 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
184 | MODULE_AUTHOR("Liam Girdwood"); | |
185 | MODULE_LICENSE("GPL"); |