Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 1 | /* |
| 2 | * ac97.c -- ALSA Soc AC97 codec support |
| 3 | * |
| 4 | * Copyright 2005 Wolfson Microelectronics PLC. |
Liam Girdwood | d331124 | 2008-10-12 13:17:36 +0100 | [diff] [blame] | 5 | * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 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 | * |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 12 | * Generic AC97 support. |
| 13 | */ |
| 14 | |
| 15 | #include <linux/init.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 17 | #include <linux/kernel.h> |
| 18 | #include <linux/device.h> |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 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> |
| 24 | |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 25 | #define AC97_VERSION "0.6" |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 26 | |
Mark Brown | dee89c4 | 2008-11-18 22:11:38 +0000 | [diff] [blame] | 27 | static int ac97_prepare(struct snd_pcm_substream *substream, |
| 28 | struct snd_soc_dai *dai) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 29 | { |
| 30 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 31 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 32 | struct snd_soc_codec *codec = rtd->codec; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 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 | |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 39 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame] | 40 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
| 41 | SNDRV_PCM_RATE_48000) |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 42 | |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 43 | static struct snd_soc_dai_ops ac97_dai_ops = { |
| 44 | .prepare = ac97_prepare, |
| 45 | }; |
| 46 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 47 | static struct snd_soc_dai_driver ac97_dai = { |
| 48 | .name = "ac97-hifi", |
Mark Brown | 3ba9e10a | 2008-11-24 18:01:05 +0000 | [diff] [blame] | 49 | .ac97_control = 1, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 50 | .playback = { |
| 51 | .stream_name = "AC97 Playback", |
| 52 | .channels_min = 1, |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 53 | .channels_max = 2, |
| 54 | .rates = STD_AC97_RATES, |
Mark Brown | 33f503c | 2009-05-02 12:24:55 +0100 | [diff] [blame] | 55 | .formats = SND_SOC_STD_AC97_FMTS,}, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 56 | .capture = { |
| 57 | .stream_name = "AC97 Capture", |
| 58 | .channels_min = 1, |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 59 | .channels_max = 2, |
| 60 | .rates = STD_AC97_RATES, |
Mark Brown | 33f503c | 2009-05-02 12:24:55 +0100 | [diff] [blame] | 61 | .formats = SND_SOC_STD_AC97_FMTS,}, |
Eric Miao | 6335d05 | 2009-03-03 09:41:00 +0800 | [diff] [blame] | 62 | .ops = &ac97_dai_ops, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 63 | }; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 64 | |
| 65 | static unsigned int ac97_read(struct snd_soc_codec *codec, |
| 66 | unsigned int reg) |
| 67 | { |
| 68 | return soc_ac97_ops.read(codec->ac97, reg); |
| 69 | } |
| 70 | |
| 71 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, |
| 72 | unsigned int val) |
| 73 | { |
| 74 | soc_ac97_ops.write(codec->ac97, reg, val); |
| 75 | return 0; |
| 76 | } |
| 77 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 78 | static int ac97_soc_probe(struct snd_soc_codec *codec) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 79 | { |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 80 | struct snd_ac97_bus *ac97_bus; |
| 81 | struct snd_ac97_template ac97_template; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 82 | int ret; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 83 | |
| 84 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); |
| 85 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 86 | ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0); |
| 87 | if (ret < 0) { |
| 88 | printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n"); |
| 89 | return ret; |
| 90 | } |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 91 | |
| 92 | /* add codec as bus device for standard ac97 */ |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 93 | ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame] | 94 | if (ret < 0) |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 95 | return ret; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 96 | |
| 97 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); |
| 98 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame] | 99 | if (ret < 0) |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 100 | return ret; |
Graham Gower | fb48e3c | 2010-03-25 10:52:12 +1030 | [diff] [blame] | 101 | |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 102 | return 0; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 103 | } |
| 104 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 105 | static int ac97_soc_remove(struct snd_soc_codec *codec) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 106 | { |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 107 | return 0; |
| 108 | } |
| 109 | |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 110 | #ifdef CONFIG_PM |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 111 | static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 112 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 113 | snd_ac97_suspend(codec->ac97); |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 118 | static int ac97_soc_resume(struct snd_soc_codec *codec) |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 119 | { |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 120 | snd_ac97_resume(codec->ac97); |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 121 | |
| 122 | return 0; |
| 123 | } |
| 124 | #else |
| 125 | #define ac97_soc_suspend NULL |
| 126 | #define ac97_soc_resume NULL |
| 127 | #endif |
| 128 | |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 129 | static struct snd_soc_codec_driver soc_codec_dev_ac97 = { |
| 130 | .write = ac97_write, |
| 131 | .read = ac97_read, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 132 | .probe = ac97_soc_probe, |
| 133 | .remove = ac97_soc_remove, |
Manuel Lauss | 3f77598 | 2008-07-03 09:33:10 +0200 | [diff] [blame] | 134 | .suspend = ac97_soc_suspend, |
| 135 | .resume = ac97_soc_resume, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 136 | }; |
Liam Girdwood | f0fba2a | 2010-03-17 20:15:21 +0000 | [diff] [blame^] | 137 | |
| 138 | static __devinit int ac97_probe(struct platform_device *pdev) |
| 139 | { |
| 140 | return snd_soc_register_codec(&pdev->dev, |
| 141 | &soc_codec_dev_ac97, &ac97_dai, 1); |
| 142 | } |
| 143 | |
| 144 | static int __devexit ac97_remove(struct platform_device *pdev) |
| 145 | { |
| 146 | snd_soc_unregister_codec(&pdev->dev); |
| 147 | return 0; |
| 148 | } |
| 149 | |
| 150 | static struct platform_driver ac97_codec_driver = { |
| 151 | .driver = { |
| 152 | .name = "ac97-codec", |
| 153 | .owner = THIS_MODULE, |
| 154 | }, |
| 155 | |
| 156 | .probe = ac97_probe, |
| 157 | .remove = __devexit_p(ac97_remove), |
| 158 | }; |
| 159 | |
| 160 | static int __init ac97_init(void) |
| 161 | { |
| 162 | return platform_driver_register(&ac97_codec_driver); |
| 163 | } |
| 164 | module_init(ac97_init); |
| 165 | |
| 166 | static void __exit ac97_exit(void) |
| 167 | { |
| 168 | platform_driver_unregister(&ac97_codec_driver); |
| 169 | } |
| 170 | module_exit(ac97_exit); |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 171 | |
| 172 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); |
| 173 | MODULE_AUTHOR("Liam Girdwood"); |
| 174 | MODULE_LICENSE("GPL"); |