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