1dbc6b6adSRichard Purdie /* 2dbc6b6adSRichard Purdie * ac97.c -- ALSA Soc AC97 codec support 3dbc6b6adSRichard Purdie * 4dbc6b6adSRichard Purdie * Copyright 2005 Wolfson Microelectronics PLC. 5d331124dSLiam Girdwood * Author: Liam Girdwood <lrg@slimlogic.co.uk> 6dbc6b6adSRichard Purdie * 7dbc6b6adSRichard Purdie * This program is free software; you can redistribute it and/or modify it 8dbc6b6adSRichard Purdie * under the terms of the GNU General Public License as published by the 9dbc6b6adSRichard Purdie * Free Software Foundation; either version 2 of the License, or (at your 10dbc6b6adSRichard Purdie * option) any later version. 11dbc6b6adSRichard Purdie * 12dbc6b6adSRichard Purdie * Generic AC97 support. 13dbc6b6adSRichard Purdie */ 14dbc6b6adSRichard Purdie 15dbc6b6adSRichard Purdie #include <linux/init.h> 165a0e3ad6STejun Heo #include <linux/slab.h> 17dbc6b6adSRichard Purdie #include <linux/kernel.h> 18dbc6b6adSRichard Purdie #include <linux/device.h> 19da155d5bSPaul Gortmaker #include <linux/module.h> 20dbc6b6adSRichard Purdie #include <sound/core.h> 21dbc6b6adSRichard Purdie #include <sound/pcm.h> 22dbc6b6adSRichard Purdie #include <sound/ac97_codec.h> 23dbc6b6adSRichard Purdie #include <sound/initval.h> 24dbc6b6adSRichard Purdie #include <sound/soc.h> 25dbc6b6adSRichard Purdie 26dee89c4dSMark Brown static int ac97_prepare(struct snd_pcm_substream *substream, 27dee89c4dSMark Brown struct snd_soc_dai *dai) 28dbc6b6adSRichard Purdie { 29dbc6b6adSRichard Purdie struct snd_pcm_runtime *runtime = substream->runtime; 30dbc6b6adSRichard Purdie struct snd_soc_pcm_runtime *rtd = substream->private_data; 31f0fba2adSLiam Girdwood struct snd_soc_codec *codec = rtd->codec; 32dbc6b6adSRichard Purdie 33dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 34dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 35dbc6b6adSRichard Purdie return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); 36dbc6b6adSRichard Purdie } 37dbc6b6adSRichard Purdie 385a8ec343SLiam Girdwood #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 3924c053e7SMark Brown SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ 4024c053e7SMark Brown SNDRV_PCM_RATE_48000) 415a8ec343SLiam Girdwood 4285e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops ac97_dai_ops = { 436335d055SEric Miao .prepare = ac97_prepare, 446335d055SEric Miao }; 456335d055SEric Miao 46f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 47f0fba2adSLiam Girdwood .name = "ac97-hifi", 483ba9e10aSMark Brown .ac97_control = 1, 49dbc6b6adSRichard Purdie .playback = { 50dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 51dbc6b6adSRichard Purdie .channels_min = 1, 525a8ec343SLiam Girdwood .channels_max = 2, 535a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5433f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 55dbc6b6adSRichard Purdie .capture = { 56dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 57dbc6b6adSRichard Purdie .channels_min = 1, 585a8ec343SLiam Girdwood .channels_max = 2, 595a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 6033f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 616335d055SEric Miao .ops = &ac97_dai_ops, 62dbc6b6adSRichard Purdie }; 63dbc6b6adSRichard Purdie 64dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 65dbc6b6adSRichard Purdie unsigned int reg) 66dbc6b6adSRichard Purdie { 67dbc6b6adSRichard Purdie return soc_ac97_ops.read(codec->ac97, reg); 68dbc6b6adSRichard Purdie } 69dbc6b6adSRichard Purdie 70dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 71dbc6b6adSRichard Purdie unsigned int val) 72dbc6b6adSRichard Purdie { 73dbc6b6adSRichard Purdie soc_ac97_ops.write(codec->ac97, reg, val); 74dbc6b6adSRichard Purdie return 0; 75dbc6b6adSRichard Purdie } 76dbc6b6adSRichard Purdie 77f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 78dbc6b6adSRichard Purdie { 79dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 80dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 81f0fba2adSLiam Girdwood int ret; 82dbc6b6adSRichard Purdie 83dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 84f0fba2adSLiam Girdwood ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); 85dbc6b6adSRichard Purdie if (ret < 0) 86f0fba2adSLiam Girdwood return ret; 87dbc6b6adSRichard Purdie 88dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 89dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 90dbc6b6adSRichard Purdie if (ret < 0) 91dbc6b6adSRichard Purdie return ret; 92f0fba2adSLiam Girdwood 93f0fba2adSLiam Girdwood return 0; 94dbc6b6adSRichard Purdie } 95dbc6b6adSRichard Purdie 96f0fba2adSLiam Girdwood static int ac97_soc_remove(struct snd_soc_codec *codec) 97dbc6b6adSRichard Purdie { 98dbc6b6adSRichard Purdie return 0; 99dbc6b6adSRichard Purdie } 100dbc6b6adSRichard Purdie 1013f775987SManuel Lauss #ifdef CONFIG_PM 102f0fba2adSLiam Girdwood static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) 1033f775987SManuel Lauss { 104f0fba2adSLiam Girdwood snd_ac97_suspend(codec->ac97); 1053f775987SManuel Lauss 1063f775987SManuel Lauss return 0; 1073f775987SManuel Lauss } 1083f775987SManuel Lauss 109f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1103f775987SManuel Lauss { 111f0fba2adSLiam Girdwood snd_ac97_resume(codec->ac97); 1123f775987SManuel Lauss 1133f775987SManuel Lauss return 0; 1143f775987SManuel Lauss } 1153f775987SManuel Lauss #else 1163f775987SManuel Lauss #define ac97_soc_suspend NULL 1173f775987SManuel Lauss #define ac97_soc_resume NULL 1183f775987SManuel Lauss #endif 1193f775987SManuel Lauss 120f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 121f0fba2adSLiam Girdwood .write = ac97_write, 122f0fba2adSLiam Girdwood .read = ac97_read, 123dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 124dbc6b6adSRichard Purdie .remove = ac97_soc_remove, 1253f775987SManuel Lauss .suspend = ac97_soc_suspend, 1263f775987SManuel Lauss .resume = ac97_soc_resume, 127dbc6b6adSRichard Purdie }; 128f0fba2adSLiam Girdwood 129f0fba2adSLiam Girdwood static __devinit int ac97_probe(struct platform_device *pdev) 130f0fba2adSLiam Girdwood { 131f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 132f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 133f0fba2adSLiam Girdwood } 134f0fba2adSLiam Girdwood 135f0fba2adSLiam Girdwood static int __devexit ac97_remove(struct platform_device *pdev) 136f0fba2adSLiam Girdwood { 137f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 138f0fba2adSLiam Girdwood return 0; 139f0fba2adSLiam Girdwood } 140f0fba2adSLiam Girdwood 141f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 142f0fba2adSLiam Girdwood .driver = { 143f0fba2adSLiam Girdwood .name = "ac97-codec", 144f0fba2adSLiam Girdwood .owner = THIS_MODULE, 145f0fba2adSLiam Girdwood }, 146f0fba2adSLiam Girdwood 147f0fba2adSLiam Girdwood .probe = ac97_probe, 148f0fba2adSLiam Girdwood .remove = __devexit_p(ac97_remove), 149f0fba2adSLiam Girdwood }; 150f0fba2adSLiam Girdwood 151f0fba2adSLiam Girdwood static int __init ac97_init(void) 152f0fba2adSLiam Girdwood { 153f0fba2adSLiam Girdwood return platform_driver_register(&ac97_codec_driver); 154f0fba2adSLiam Girdwood } 155f0fba2adSLiam Girdwood module_init(ac97_init); 156f0fba2adSLiam Girdwood 157f0fba2adSLiam Girdwood static void __exit ac97_exit(void) 158f0fba2adSLiam Girdwood { 159f0fba2adSLiam Girdwood platform_driver_unregister(&ac97_codec_driver); 160f0fba2adSLiam Girdwood } 161f0fba2adSLiam Girdwood module_exit(ac97_exit); 162dbc6b6adSRichard Purdie 163dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 164dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 165dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 1660afe6b90SMika Westerberg MODULE_ALIAS("platform:ac97-codec"); 167