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. |
| 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> |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 22 | #include <sound/core.h> |
| 23 | #include <sound/pcm.h> |
| 24 | #include <sound/ac97_codec.h> |
| 25 | #include <sound/initval.h> |
| 26 | #include <sound/soc.h> |
| 27 | |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 28 | #define AC97_VERSION "0.6" |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 29 | |
| 30 | static int ac97_prepare(struct snd_pcm_substream *substream) |
| 31 | { |
| 32 | struct snd_pcm_runtime *runtime = substream->runtime; |
| 33 | struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| 34 | struct snd_soc_device *socdev = rtd->socdev; |
| 35 | struct snd_soc_codec *codec = socdev->codec; |
| 36 | |
| 37 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
| 38 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; |
| 39 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); |
| 40 | } |
| 41 | |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 42 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 43 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
| 44 | SNDRV_PCM_RATE_48000) |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 45 | |
Liam Girdwood | 9ae67c7 | 2007-05-10 17:12:31 +0200 | [diff] [blame] | 46 | struct snd_soc_codec_dai ac97_dai = { |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 47 | .name = "AC97 HiFi", |
Liam Girdwood | a68660e | 2007-05-10 19:27:27 +0200 | [diff] [blame] | 48 | .type = SND_SOC_DAI_AC97, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 49 | .playback = { |
| 50 | .stream_name = "AC97 Playback", |
| 51 | .channels_min = 1, |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 52 | .channels_max = 2, |
| 53 | .rates = STD_AC97_RATES, |
| 54 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 55 | .capture = { |
| 56 | .stream_name = "AC97 Capture", |
| 57 | .channels_min = 1, |
Liam Girdwood | 5a8ec34 | 2007-02-02 17:16:41 +0100 | [diff] [blame] | 58 | .channels_max = 2, |
| 59 | .rates = STD_AC97_RATES, |
| 60 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 61 | .ops = { |
| 62 | .prepare = ac97_prepare,}, |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 63 | }; |
Graeme Gregory | 5d0cede | 2007-04-16 19:20:17 +0200 | [diff] [blame] | 64 | EXPORT_SYMBOL_GPL(ac97_dai); |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 65 | |
| 66 | static unsigned int ac97_read(struct snd_soc_codec *codec, |
| 67 | unsigned int reg) |
| 68 | { |
| 69 | return soc_ac97_ops.read(codec->ac97, reg); |
| 70 | } |
| 71 | |
| 72 | static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, |
| 73 | unsigned int val) |
| 74 | { |
| 75 | soc_ac97_ops.write(codec->ac97, reg, val); |
| 76 | return 0; |
| 77 | } |
| 78 | |
| 79 | static int ac97_soc_probe(struct platform_device *pdev) |
| 80 | { |
| 81 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 82 | struct snd_soc_codec *codec; |
| 83 | struct snd_ac97_bus *ac97_bus; |
| 84 | struct snd_ac97_template ac97_template; |
| 85 | int ret = 0; |
| 86 | |
| 87 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); |
| 88 | |
| 89 | socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 90 | if (!socdev->codec) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 91 | return -ENOMEM; |
| 92 | codec = socdev->codec; |
| 93 | mutex_init(&codec->mutex); |
| 94 | |
| 95 | codec->name = "AC97"; |
| 96 | codec->owner = THIS_MODULE; |
| 97 | codec->dai = &ac97_dai; |
| 98 | codec->num_dai = 1; |
| 99 | codec->write = ac97_write; |
| 100 | codec->read = ac97_read; |
| 101 | INIT_LIST_HEAD(&codec->dapm_widgets); |
| 102 | INIT_LIST_HEAD(&codec->dapm_paths); |
| 103 | |
| 104 | /* register pcms */ |
| 105 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 106 | if (ret < 0) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 107 | goto err; |
| 108 | |
| 109 | /* add codec as bus device for standard ac97 */ |
| 110 | ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 111 | if (ret < 0) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 112 | goto bus_err; |
| 113 | |
| 114 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); |
| 115 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 116 | if (ret < 0) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 117 | goto bus_err; |
| 118 | |
| 119 | ret = snd_soc_register_card(socdev); |
| 120 | if (ret < 0) |
| 121 | goto bus_err; |
| 122 | return 0; |
| 123 | |
| 124 | bus_err: |
| 125 | snd_soc_free_pcms(socdev); |
| 126 | |
| 127 | err: |
| 128 | kfree(socdev->codec->reg_cache); |
| 129 | kfree(socdev->codec); |
| 130 | socdev->codec = NULL; |
| 131 | return ret; |
| 132 | } |
| 133 | |
| 134 | static int ac97_soc_remove(struct platform_device *pdev) |
| 135 | { |
| 136 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| 137 | struct snd_soc_codec *codec = socdev->codec; |
| 138 | |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 139 | if (!codec) |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 140 | return 0; |
| 141 | |
| 142 | snd_soc_free_pcms(socdev); |
| 143 | kfree(socdev->codec->reg_cache); |
| 144 | kfree(socdev->codec); |
| 145 | |
| 146 | return 0; |
| 147 | } |
| 148 | |
Mark Brown | 24c053e | 2008-04-23 15:26:45 +0200 | [diff] [blame^] | 149 | struct snd_soc_codec_device soc_codec_dev_ac97 = { |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 150 | .probe = ac97_soc_probe, |
| 151 | .remove = ac97_soc_remove, |
| 152 | }; |
Richard Purdie | dbc6b6a | 2006-10-06 18:38:03 +0200 | [diff] [blame] | 153 | EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); |
| 154 | |
| 155 | MODULE_DESCRIPTION("Soc Generic AC97 driver"); |
| 156 | MODULE_AUTHOR("Liam Girdwood"); |
| 157 | MODULE_LICENSE("GPL"); |