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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> | |
16 | #include <linux/kernel.h> | |
17 | #include <linux/device.h> | |
dbc6b6ad RP |
18 | #include <sound/core.h> |
19 | #include <sound/pcm.h> | |
20 | #include <sound/ac97_codec.h> | |
21 | #include <sound/initval.h> | |
22 | #include <sound/soc.h> | |
dbac7cb8 | 23 | #include "ac97.h" |
dbc6b6ad | 24 | |
5a8ec343 | 25 | #define AC97_VERSION "0.6" |
dbc6b6ad | 26 | |
dee89c4d MB |
27 | static int ac97_prepare(struct snd_pcm_substream *substream, |
28 | struct snd_soc_dai *dai) | |
dbc6b6ad RP |
29 | { |
30 | struct snd_pcm_runtime *runtime = substream->runtime; | |
31 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
32 | struct snd_soc_device *socdev = rtd->socdev; | |
33 | struct snd_soc_codec *codec = socdev->codec; | |
34 | ||
35 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
36 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
37 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | |
38 | } | |
39 | ||
5a8ec343 | 40 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
24c053e7 MB |
41 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
42 | SNDRV_PCM_RATE_48000) | |
5a8ec343 | 43 | |
e550e17f | 44 | struct snd_soc_dai ac97_dai = { |
dbc6b6ad | 45 | .name = "AC97 HiFi", |
a68660e0 | 46 | .type = SND_SOC_DAI_AC97, |
dbc6b6ad RP |
47 | .playback = { |
48 | .stream_name = "AC97 Playback", | |
49 | .channels_min = 1, | |
5a8ec343 LG |
50 | .channels_max = 2, |
51 | .rates = STD_AC97_RATES, | |
52 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
dbc6b6ad RP |
53 | .capture = { |
54 | .stream_name = "AC97 Capture", | |
55 | .channels_min = 1, | |
5a8ec343 LG |
56 | .channels_max = 2, |
57 | .rates = STD_AC97_RATES, | |
58 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
dbc6b6ad RP |
59 | .ops = { |
60 | .prepare = ac97_prepare,}, | |
dbc6b6ad | 61 | }; |
5d0cedee | 62 | EXPORT_SYMBOL_GPL(ac97_dai); |
dbc6b6ad RP |
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 | ||
77 | static int ac97_soc_probe(struct platform_device *pdev) | |
78 | { | |
79 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
80 | struct snd_soc_codec *codec; | |
81 | struct snd_ac97_bus *ac97_bus; | |
82 | struct snd_ac97_template ac97_template; | |
83 | int ret = 0; | |
84 | ||
85 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); | |
86 | ||
87 | socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
24c053e7 | 88 | if (!socdev->codec) |
dbc6b6ad RP |
89 | return -ENOMEM; |
90 | codec = socdev->codec; | |
91 | mutex_init(&codec->mutex); | |
92 | ||
93 | codec->name = "AC97"; | |
94 | codec->owner = THIS_MODULE; | |
95 | codec->dai = &ac97_dai; | |
96 | codec->num_dai = 1; | |
97 | codec->write = ac97_write; | |
98 | codec->read = ac97_read; | |
99 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
100 | INIT_LIST_HEAD(&codec->dapm_paths); | |
101 | ||
102 | /* register pcms */ | |
103 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
24c053e7 | 104 | if (ret < 0) |
dbc6b6ad RP |
105 | goto err; |
106 | ||
107 | /* add codec as bus device for standard ac97 */ | |
108 | ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); | |
24c053e7 | 109 | if (ret < 0) |
dbc6b6ad RP |
110 | goto bus_err; |
111 | ||
112 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
113 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
24c053e7 | 114 | if (ret < 0) |
dbc6b6ad RP |
115 | goto bus_err; |
116 | ||
117 | ret = snd_soc_register_card(socdev); | |
118 | if (ret < 0) | |
119 | goto bus_err; | |
120 | return 0; | |
121 | ||
122 | bus_err: | |
123 | snd_soc_free_pcms(socdev); | |
124 | ||
125 | err: | |
126 | kfree(socdev->codec->reg_cache); | |
127 | kfree(socdev->codec); | |
128 | socdev->codec = NULL; | |
129 | return ret; | |
130 | } | |
131 | ||
132 | static int ac97_soc_remove(struct platform_device *pdev) | |
133 | { | |
134 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
135 | struct snd_soc_codec *codec = socdev->codec; | |
136 | ||
24c053e7 | 137 | if (!codec) |
dbc6b6ad RP |
138 | return 0; |
139 | ||
140 | snd_soc_free_pcms(socdev); | |
141 | kfree(socdev->codec->reg_cache); | |
142 | kfree(socdev->codec); | |
143 | ||
144 | return 0; | |
145 | } | |
146 | ||
3f775987 ML |
147 | #ifdef CONFIG_PM |
148 | static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg) | |
149 | { | |
150 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
151 | ||
152 | snd_ac97_suspend(socdev->codec->ac97); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int ac97_soc_resume(struct platform_device *pdev) | |
158 | { | |
159 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
160 | ||
161 | snd_ac97_resume(socdev->codec->ac97); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | #else | |
166 | #define ac97_soc_suspend NULL | |
167 | #define ac97_soc_resume NULL | |
168 | #endif | |
169 | ||
24c053e7 | 170 | struct snd_soc_codec_device soc_codec_dev_ac97 = { |
dbc6b6ad RP |
171 | .probe = ac97_soc_probe, |
172 | .remove = ac97_soc_remove, | |
3f775987 ML |
173 | .suspend = ac97_soc_suspend, |
174 | .resume = ac97_soc_resume, | |
dbc6b6ad | 175 | }; |
dbc6b6ad RP |
176 | EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); |
177 | ||
178 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | |
179 | MODULE_AUTHOR("Liam Girdwood"); | |
180 | MODULE_LICENSE("GPL"); |