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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | /* * ac97.c -- ALSA Soc AC97 codec support * * Copyright 2005 Wolfson Microelectronics PLC. * Author: Liam Girdwood <lrg@slimlogic.co.uk> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * Generic AC97 support. */ #include <linux/init.h> #include <linux/slab.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/module.h> #include <sound/core.h> #include <sound/pcm.h> #include <sound/ac97_codec.h> #include <sound/initval.h> #include <sound/soc.h> static const struct snd_soc_dapm_widget ac97_widgets[] = { SND_SOC_DAPM_INPUT("RX"), SND_SOC_DAPM_OUTPUT("TX"), }; static const struct snd_soc_dapm_route ac97_routes[] = { { "AC97 Capture", NULL, "RX" }, { "TX", NULL, "AC97 Playback" }, }; static int ac97_prepare(struct snd_pcm_substream *substream, struct snd_soc_dai *dai) { struct snd_soc_codec *codec = dai->codec; int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate); } #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ SNDRV_PCM_RATE_48000) static const struct snd_soc_dai_ops ac97_dai_ops = { .prepare = ac97_prepare, }; static struct snd_soc_dai_driver ac97_dai = { .name = "ac97-hifi", .ac97_control = 1, .playback = { .stream_name = "AC97 Playback", .channels_min = 1, .channels_max = 2, .rates = STD_AC97_RATES, .formats = SND_SOC_STD_AC97_FMTS,}, .capture = { .stream_name = "AC97 Capture", .channels_min = 1, .channels_max = 2, .rates = STD_AC97_RATES, .formats = SND_SOC_STD_AC97_FMTS,}, .ops = &ac97_dai_ops, }; static unsigned int ac97_read(struct snd_soc_codec *codec, unsigned int reg) { return soc_ac97_ops->read(codec->ac97, reg); } static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int val) { soc_ac97_ops->write(codec->ac97, reg, val); return 0; } static int ac97_soc_probe(struct snd_soc_codec *codec) { struct snd_ac97_bus *ac97_bus; struct snd_ac97_template ac97_template; int ret; /* add codec as bus device for standard ac97 */ ret = snd_ac97_bus(codec->card->snd_card, 0, soc_ac97_ops, NULL, &ac97_bus); if (ret < 0) return ret; memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); if (ret < 0) return ret; return 0; } #ifdef CONFIG_PM static int ac97_soc_suspend(struct snd_soc_codec *codec) { snd_ac97_suspend(codec->ac97); return 0; } static int ac97_soc_resume(struct snd_soc_codec *codec) { snd_ac97_resume(codec->ac97); return 0; } #else #define ac97_soc_suspend NULL #define ac97_soc_resume NULL #endif static struct snd_soc_codec_driver soc_codec_dev_ac97 = { .write = ac97_write, .read = ac97_read, .probe = ac97_soc_probe, .suspend = ac97_soc_suspend, .resume = ac97_soc_resume, .dapm_widgets = ac97_widgets, .num_dapm_widgets = ARRAY_SIZE(ac97_widgets), .dapm_routes = ac97_routes, .num_dapm_routes = ARRAY_SIZE(ac97_routes), }; static int ac97_probe(struct platform_device *pdev) { return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_ac97, &ac97_dai, 1); } static int ac97_remove(struct platform_device *pdev) { snd_soc_unregister_codec(&pdev->dev); return 0; } static struct platform_driver ac97_codec_driver = { .driver = { .name = "ac97-codec", .owner = THIS_MODULE, }, .probe = ac97_probe, .remove = ac97_remove, }; module_platform_driver(ac97_codec_driver); MODULE_DESCRIPTION("Soc Generic AC97 driver"); MODULE_AUTHOR("Liam Girdwood"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:ac97-codec"); |