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 { 29e6968a17SMark Brown struct snd_soc_codec *codec = dai->codec; 30dbc6b6adSRichard Purdie 31dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 32dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 337a0a289cSFabio Estevam return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate); 34dbc6b6adSRichard Purdie } 35dbc6b6adSRichard Purdie 365a8ec343SLiam Girdwood #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 3724c053e7SMark Brown SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ 3824c053e7SMark Brown SNDRV_PCM_RATE_48000) 395a8ec343SLiam Girdwood 4085e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops ac97_dai_ops = { 416335d055SEric Miao .prepare = ac97_prepare, 426335d055SEric Miao }; 436335d055SEric Miao 44f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 45f0fba2adSLiam Girdwood .name = "ac97-hifi", 463ba9e10aSMark Brown .ac97_control = 1, 47dbc6b6adSRichard Purdie .playback = { 48dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 49dbc6b6adSRichard Purdie .channels_min = 1, 505a8ec343SLiam Girdwood .channels_max = 2, 515a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5233f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 53dbc6b6adSRichard Purdie .capture = { 54dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 55dbc6b6adSRichard Purdie .channels_min = 1, 565a8ec343SLiam Girdwood .channels_max = 2, 575a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5833f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 596335d055SEric Miao .ops = &ac97_dai_ops, 60dbc6b6adSRichard Purdie }; 61dbc6b6adSRichard Purdie 62dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 63dbc6b6adSRichard Purdie unsigned int reg) 64dbc6b6adSRichard Purdie { 65dbc6b6adSRichard Purdie return soc_ac97_ops.read(codec->ac97, reg); 66dbc6b6adSRichard Purdie } 67dbc6b6adSRichard Purdie 68dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 69dbc6b6adSRichard Purdie unsigned int val) 70dbc6b6adSRichard Purdie { 71dbc6b6adSRichard Purdie soc_ac97_ops.write(codec->ac97, reg, val); 72dbc6b6adSRichard Purdie return 0; 73dbc6b6adSRichard Purdie } 74dbc6b6adSRichard Purdie 75f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 76dbc6b6adSRichard Purdie { 77dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 78dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 79f0fba2adSLiam Girdwood int ret; 80dbc6b6adSRichard Purdie 81dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 82f0fba2adSLiam Girdwood ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); 83dbc6b6adSRichard Purdie if (ret < 0) 84f0fba2adSLiam Girdwood return ret; 85dbc6b6adSRichard Purdie 86dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 87dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 88dbc6b6adSRichard Purdie if (ret < 0) 89dbc6b6adSRichard Purdie return ret; 90f0fba2adSLiam Girdwood 91f0fba2adSLiam Girdwood return 0; 92dbc6b6adSRichard Purdie } 93dbc6b6adSRichard Purdie 943f775987SManuel Lauss #ifdef CONFIG_PM 9584b315eeSLars-Peter Clausen static int ac97_soc_suspend(struct snd_soc_codec *codec) 963f775987SManuel Lauss { 97f0fba2adSLiam Girdwood snd_ac97_suspend(codec->ac97); 983f775987SManuel Lauss 993f775987SManuel Lauss return 0; 1003f775987SManuel Lauss } 1013f775987SManuel Lauss 102f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1033f775987SManuel Lauss { 104f0fba2adSLiam Girdwood snd_ac97_resume(codec->ac97); 1053f775987SManuel Lauss 1063f775987SManuel Lauss return 0; 1073f775987SManuel Lauss } 1083f775987SManuel Lauss #else 1093f775987SManuel Lauss #define ac97_soc_suspend NULL 1103f775987SManuel Lauss #define ac97_soc_resume NULL 1113f775987SManuel Lauss #endif 1123f775987SManuel Lauss 113f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 114f0fba2adSLiam Girdwood .write = ac97_write, 115f0fba2adSLiam Girdwood .read = ac97_read, 116dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 1173f775987SManuel Lauss .suspend = ac97_soc_suspend, 1183f775987SManuel Lauss .resume = ac97_soc_resume, 119dbc6b6adSRichard Purdie }; 120f0fba2adSLiam Girdwood 1217a79e94eSBill Pemberton static int ac97_probe(struct platform_device *pdev) 122f0fba2adSLiam Girdwood { 123f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 124f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 125f0fba2adSLiam Girdwood } 126f0fba2adSLiam Girdwood 1277a79e94eSBill Pemberton static int ac97_remove(struct platform_device *pdev) 128f0fba2adSLiam Girdwood { 129f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 130f0fba2adSLiam Girdwood return 0; 131f0fba2adSLiam Girdwood } 132f0fba2adSLiam Girdwood 133f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 134f0fba2adSLiam Girdwood .driver = { 135f0fba2adSLiam Girdwood .name = "ac97-codec", 136f0fba2adSLiam Girdwood .owner = THIS_MODULE, 137f0fba2adSLiam Girdwood }, 138f0fba2adSLiam Girdwood 139f0fba2adSLiam Girdwood .probe = ac97_probe, 1407a79e94eSBill Pemberton .remove = ac97_remove, 141f0fba2adSLiam Girdwood }; 142f0fba2adSLiam Girdwood 1435bbcc3c0SMark Brown module_platform_driver(ac97_codec_driver); 144dbc6b6adSRichard Purdie 145dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 146dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 147dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 1480afe6b90SMika Westerberg MODULE_ALIAS("platform:ac97-codec"); 149