projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| dbc6b6ad RP |
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 | ||
| 5a8ec343 | 29 | #define AC97_VERSION "0.6" |
| dbc6b6ad RP |
30 | |
| 31 | static int ac97_prepare(struct snd_pcm_substream *substream) | |
| 32 | { | |
| 33 | struct snd_pcm_runtime *runtime = substream->runtime; | |
| 34 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
| 35 | struct snd_soc_device *socdev = rtd->socdev; | |
| 36 | struct snd_soc_codec *codec = socdev->codec; | |
| 37 | ||
| 38 | int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? | |
| 39 | AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; | |
| 40 | return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); | |
| 41 | } | |
| 42 | ||
| 5a8ec343 LG |
43 | #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
| 44 | SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) | |
| 45 | ||
| 9ae67c7b | 46 | struct snd_soc_codec_dai ac97_dai = { |
| dbc6b6ad RP |
47 | .name = "AC97 HiFi", |
| 48 | .playback = { | |
| 49 | .stream_name = "AC97 Playback", | |
| 50 | .channels_min = 1, | |
| 5a8ec343 LG |
51 | .channels_max = 2, |
| 52 | .rates = STD_AC97_RATES, | |
| 53 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
| dbc6b6ad RP |
54 | .capture = { |
| 55 | .stream_name = "AC97 Capture", | |
| 56 | .channels_min = 1, | |
| 5a8ec343 LG |
57 | .channels_max = 2, |
| 58 | .rates = STD_AC97_RATES, | |
| 59 | .formats = SNDRV_PCM_FMTBIT_S16_LE,}, | |
| dbc6b6ad RP |
60 | .ops = { |
| 61 | .prepare = ac97_prepare,}, | |
| dbc6b6ad | 62 | }; |
| 5d0cedee | 63 | EXPORT_SYMBOL_GPL(ac97_dai); |
| dbc6b6ad RP |
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 | ||
| 78 | static int ac97_soc_probe(struct platform_device *pdev) | |
| 79 | { | |
| 80 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
| 81 | struct snd_soc_codec *codec; | |
| 82 | struct snd_ac97_bus *ac97_bus; | |
| 83 | struct snd_ac97_template ac97_template; | |
| 84 | int ret = 0; | |
| 85 | ||
| 86 | printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); | |
| 87 | ||
| 88 | socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
| 89 | if (socdev->codec == NULL) | |
| 90 | return -ENOMEM; | |
| 91 | codec = socdev->codec; | |
| 92 | mutex_init(&codec->mutex); | |
| 93 | ||
| 94 | codec->name = "AC97"; | |
| 95 | codec->owner = THIS_MODULE; | |
| 96 | codec->dai = &ac97_dai; | |
| 97 | codec->num_dai = 1; | |
| 98 | codec->write = ac97_write; | |
| 99 | codec->read = ac97_read; | |
| 100 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
| 101 | INIT_LIST_HEAD(&codec->dapm_paths); | |
| 102 | ||
| 103 | /* register pcms */ | |
| 104 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
| 105 | if(ret < 0) | |
| 106 | goto err; | |
| 107 | ||
| 108 | /* add codec as bus device for standard ac97 */ | |
| 109 | ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); | |
| 110 | if(ret < 0) | |
| 111 | goto bus_err; | |
| 112 | ||
| 113 | memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); | |
| 114 | ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); | |
| 115 | if(ret < 0) | |
| 116 | goto bus_err; | |
| 117 | ||
| 118 | ret = snd_soc_register_card(socdev); | |
| 119 | if (ret < 0) | |
| 120 | goto bus_err; | |
| 121 | return 0; | |
| 122 | ||
| 123 | bus_err: | |
| 124 | snd_soc_free_pcms(socdev); | |
| 125 | ||
| 126 | err: | |
| 127 | kfree(socdev->codec->reg_cache); | |
| 128 | kfree(socdev->codec); | |
| 129 | socdev->codec = NULL; | |
| 130 | return ret; | |
| 131 | } | |
| 132 | ||
| 133 | static int ac97_soc_remove(struct platform_device *pdev) | |
| 134 | { | |
| 135 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
| 136 | struct snd_soc_codec *codec = socdev->codec; | |
| 137 | ||
| 138 | if(codec == NULL) | |
| 139 | return 0; | |
| 140 | ||
| 141 | snd_soc_free_pcms(socdev); | |
| 142 | kfree(socdev->codec->reg_cache); | |
| 143 | kfree(socdev->codec); | |
| 144 | ||
| 145 | return 0; | |
| 146 | } | |
| 147 | ||
| 148 | struct snd_soc_codec_device soc_codec_dev_ac97= { | |
| 149 | .probe = ac97_soc_probe, | |
| 150 | .remove = ac97_soc_remove, | |
| 151 | }; | |
| 152 | ||
| 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"); |