diff options
Diffstat (limited to 'sound/soc/codecs')
-rw-r--r-- | sound/soc/codecs/ac97.c | 167 | ||||
-rw-r--r-- | sound/soc/codecs/ac97.h | 18 |
2 files changed, 185 insertions, 0 deletions
diff --git a/sound/soc/codecs/ac97.c b/sound/soc/codecs/ac97.c new file mode 100644 index 000000000000..dd1a9f579a6b --- /dev/null +++ b/sound/soc/codecs/ac97.c | |||
@@ -0,0 +1,167 @@ | |||
1 | /* | ||
2 | * ac97.c -- ALSA Soc AC97 codec support | ||
3 | * | ||
4 | * Copyright 2005 Wolfson Microelectronics PLC. | ||
5 | * Author: Liam Girdwood | ||
6 | * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify it | ||
9 | * under the terms of the GNU General Public License as published by the | ||
10 | * Free Software Foundation; either version 2 of the License, or (at your | ||
11 | * option) any later version. | ||
12 | * | ||
13 | * Revision history | ||
14 | * 17th Oct 2005 Initial version. | ||
15 | * | ||
16 | * Generic AC97 support. | ||
17 | */ | ||
18 | |||
19 | #include <linux/init.h> | ||
20 | #include <linux/kernel.h> | ||
21 | #include <linux/device.h> | ||
22 | #include <sound/driver.h> | ||
23 | #include <sound/core.h> | ||
24 | #include <sound/pcm.h> | ||
25 | #include <sound/ac97_codec.h> | ||
26 | #include <sound/initval.h> | ||
27 | #include <sound/soc.h> | ||
28 | |||
29 | #define AC97_VERSION "0.5" | ||
30 | |||
31 | #define AC97_DIR \ | ||
32 | (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) | ||
33 | |||
34 | #define AC97_RATES \ | ||
35 | (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ | ||
36 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | ||
37 | SNDRV_PCM_RATE_48000) | ||
38 | |||
39 | /* may need to expand this */ | ||
40 | static struct snd_soc_dai_mode soc_ac97[] = { | ||
41 | {0, 0, SNDRV_PCM_FMTBIT_S16_LE, AC97_RATES}, | ||
42 | {0, 0, SNDRV_PCM_FMTBIT_S18_3LE, AC97_RATES}, | ||
43 | {0, 0, SNDRV_PCM_FMTBIT_S20_3LE, AC97_RATES}, | ||
44 | }; | ||
45 | |||
46 | static int ac97_prepare(struct snd_pcm_substream *substream) | ||
47 | { | ||
48 | struct snd_pcm_runtime *runtime = substream->runtime; | ||
49 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
50 | struct snd_soc_device *socdev = rtd->socdev; | ||
51 | struct snd_soc_codec *codec = socdev->codec; | ||
52 | |||
53 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | ||
54 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | ||
55 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | ||
56 | } | ||
57 | |||
58 | static struct snd_soc_codec_dai ac97_dai = { | ||
59 | .name = "AC97 HiFi", | ||
60 | .playback = { | ||
61 | .stream_name = "AC97 Playback", | ||
62 | .channels_min = 1, | ||
63 | .channels_max = 2,}, | ||
64 | .capture = { | ||
65 | .stream_name = "AC97 Capture", | ||
66 | .channels_min = 1, | ||
67 | .channels_max = 2,}, | ||
68 | .ops = { | ||
69 | .prepare = ac97_prepare,}, | ||
70 | .caps = { | ||
71 | .num_modes = ARRAY_SIZE(soc_ac97), | ||
72 | .mode = soc_ac97,}, | ||
73 | }; | ||
74 | |||
75 | static unsigned int ac97_read(struct snd_soc_codec *codec, | ||
76 | unsigned int reg) | ||
77 | { | ||
78 | return soc_ac97_ops.read(codec->ac97, reg); | ||
79 | } | ||
80 | |||
81 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, | ||
82 | unsigned int val) | ||
83 | { | ||
84 | soc_ac97_ops.write(codec->ac97, reg, val); | ||
85 | return 0; | ||
86 | } | ||
87 | |||
88 | static int ac97_soc_probe(struct platform_device *pdev) | ||
89 | { | ||
90 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | ||
91 | struct snd_soc_codec *codec; | ||
92 | struct snd_ac97_bus *ac97_bus; | ||
93 | struct snd_ac97_template ac97_template; | ||
94 | int ret = 0; | ||
95 | |||
96 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); | ||
97 | |||
98 | socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | ||
99 | if (socdev->codec == NULL) | ||
100 | return -ENOMEM; | ||
101 | codec = socdev->codec; | ||
102 | mutex_init(&codec->mutex); | ||
103 | |||
104 | codec->name = "AC97"; | ||
105 | codec->owner = THIS_MODULE; | ||
106 | codec->dai = &ac97_dai; | ||
107 | codec->num_dai = 1; | ||
108 | codec->write = ac97_write; | ||
109 | codec->read = ac97_read; | ||
110 | INIT_LIST_HEAD(&codec->dapm_widgets); | ||
111 | INIT_LIST_HEAD(&codec->dapm_paths); | ||
112 | |||
113 | /* register pcms */ | ||
114 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | ||
115 | if(ret < 0) | ||
116 | goto err; | ||
117 | |||
118 | /* add codec as bus device for standard ac97 */ | ||
119 | ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); | ||
120 | if(ret < 0) | ||
121 | goto bus_err; | ||
122 | |||
123 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | ||
124 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | ||
125 | if(ret < 0) | ||
126 | goto bus_err; | ||
127 | |||
128 | ret = snd_soc_register_card(socdev); | ||
129 | if (ret < 0) | ||
130 | goto bus_err; | ||
131 | return 0; | ||
132 | |||
133 | bus_err: | ||
134 | snd_soc_free_pcms(socdev); | ||
135 | |||
136 | err: | ||
137 | kfree(socdev->codec->reg_cache); | ||
138 | kfree(socdev->codec); | ||
139 | socdev->codec = NULL; | ||
140 | return ret; | ||
141 | } | ||
142 | |||
143 | static int ac97_soc_remove(struct platform_device *pdev) | ||
144 | { | ||
145 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | ||
146 | struct snd_soc_codec *codec = socdev->codec; | ||
147 | |||
148 | if(codec == NULL) | ||
149 | return 0; | ||
150 | |||
151 | snd_soc_free_pcms(socdev); | ||
152 | kfree(socdev->codec->reg_cache); | ||
153 | kfree(socdev->codec); | ||
154 | |||
155 | return 0; | ||
156 | } | ||
157 | |||
158 | struct snd_soc_codec_device soc_codec_dev_ac97= { | ||
159 | .probe = ac97_soc_probe, | ||
160 | .remove = ac97_soc_remove, | ||
161 | }; | ||
162 | |||
163 | EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); | ||
164 | |||
165 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); | ||
166 | MODULE_AUTHOR("Liam Girdwood"); | ||
167 | MODULE_LICENSE("GPL"); | ||
diff --git a/sound/soc/codecs/ac97.h b/sound/soc/codecs/ac97.h new file mode 100644 index 000000000000..930ddfc2321a --- /dev/null +++ b/sound/soc/codecs/ac97.h | |||
@@ -0,0 +1,18 @@ | |||
1 | /* | ||
2 | * linux/sound/codecs/ac97.h -- ALSA SoC Layer | ||
3 | * | ||
4 | * Author: Liam Girdwood | ||
5 | * Created: Dec 1st 2005 | ||
6 | * Copyright: Wolfson Microelectronics. PLC. | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | #ifndef __LINUX_SND_SOC_AC97_H | ||
14 | #define __LINUX_SND_SOC_AC97_H | ||
15 | |||
16 | extern struct snd_soc_codec_device soc_codec_dev_ac97; | ||
17 | |||
18 | #endif | ||