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 26d2a369cbSMark Brown static const struct snd_soc_dapm_widget ac97_widgets[] = { 27d2a369cbSMark Brown SND_SOC_DAPM_INPUT("RX"), 28d2a369cbSMark Brown SND_SOC_DAPM_OUTPUT("TX"), 29d2a369cbSMark Brown }; 30d2a369cbSMark Brown 31d2a369cbSMark Brown static const struct snd_soc_dapm_route ac97_routes[] = { 32d2a369cbSMark Brown { "AC97 Capture", NULL, "RX" }, 33d2a369cbSMark Brown { "TX", NULL, "AC97 Playback" }, 34d2a369cbSMark Brown }; 35d2a369cbSMark Brown 36dee89c4dSMark Brown static int ac97_prepare(struct snd_pcm_substream *substream, 37dee89c4dSMark Brown struct snd_soc_dai *dai) 38dbc6b6adSRichard Purdie { 39e6968a17SMark Brown struct snd_soc_codec *codec = dai->codec; 40dbc6b6adSRichard Purdie 41dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 42dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 437a0a289cSFabio Estevam return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate); 44dbc6b6adSRichard Purdie } 45dbc6b6adSRichard Purdie 465a8ec343SLiam Girdwood #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 4724c053e7SMark Brown SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ 4824c053e7SMark Brown SNDRV_PCM_RATE_48000) 495a8ec343SLiam Girdwood 5085e7652dSLars-Peter Clausen static const struct snd_soc_dai_ops ac97_dai_ops = { 516335d055SEric Miao .prepare = ac97_prepare, 526335d055SEric Miao }; 536335d055SEric Miao 54f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 55f0fba2adSLiam Girdwood .name = "ac97-hifi", 563ba9e10aSMark Brown .ac97_control = 1, 57dbc6b6adSRichard Purdie .playback = { 58dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 59dbc6b6adSRichard Purdie .channels_min = 1, 605a8ec343SLiam Girdwood .channels_max = 2, 615a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 6233f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 63dbc6b6adSRichard Purdie .capture = { 64dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 65dbc6b6adSRichard Purdie .channels_min = 1, 665a8ec343SLiam Girdwood .channels_max = 2, 675a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 6833f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 696335d055SEric Miao .ops = &ac97_dai_ops, 70dbc6b6adSRichard Purdie }; 71dbc6b6adSRichard Purdie 72dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 73dbc6b6adSRichard Purdie unsigned int reg) 74dbc6b6adSRichard Purdie { 75b047e1ccSMark Brown return soc_ac97_ops->read(codec->ac97, reg); 76dbc6b6adSRichard Purdie } 77dbc6b6adSRichard Purdie 78dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 79dbc6b6adSRichard Purdie unsigned int val) 80dbc6b6adSRichard Purdie { 81b047e1ccSMark Brown soc_ac97_ops->write(codec->ac97, reg, val); 82dbc6b6adSRichard Purdie return 0; 83dbc6b6adSRichard Purdie } 84dbc6b6adSRichard Purdie 85f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 86dbc6b6adSRichard Purdie { 87dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 88dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 89f0fba2adSLiam Girdwood int ret; 90dbc6b6adSRichard Purdie 91dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 9200200107SLars-Peter Clausen ret = snd_ac97_bus(codec->component.card->snd_card, 0, soc_ac97_ops, 9300200107SLars-Peter Clausen NULL, &ac97_bus); 94dbc6b6adSRichard Purdie if (ret < 0) 95f0fba2adSLiam Girdwood return ret; 96dbc6b6adSRichard Purdie 97dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 98dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 99dbc6b6adSRichard Purdie if (ret < 0) 100dbc6b6adSRichard Purdie return ret; 101f0fba2adSLiam Girdwood 102f0fba2adSLiam Girdwood return 0; 103dbc6b6adSRichard Purdie } 104dbc6b6adSRichard Purdie 1053f775987SManuel Lauss #ifdef CONFIG_PM 10684b315eeSLars-Peter Clausen static int ac97_soc_suspend(struct snd_soc_codec *codec) 1073f775987SManuel Lauss { 108f0fba2adSLiam Girdwood snd_ac97_suspend(codec->ac97); 1093f775987SManuel Lauss 1103f775987SManuel Lauss return 0; 1113f775987SManuel Lauss } 1123f775987SManuel Lauss 113f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1143f775987SManuel Lauss { 115f0fba2adSLiam Girdwood snd_ac97_resume(codec->ac97); 1163f775987SManuel Lauss 1173f775987SManuel Lauss return 0; 1183f775987SManuel Lauss } 1193f775987SManuel Lauss #else 1203f775987SManuel Lauss #define ac97_soc_suspend NULL 1213f775987SManuel Lauss #define ac97_soc_resume NULL 1223f775987SManuel Lauss #endif 1233f775987SManuel Lauss 124f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 125f0fba2adSLiam Girdwood .write = ac97_write, 126f0fba2adSLiam Girdwood .read = ac97_read, 127dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 1283f775987SManuel Lauss .suspend = ac97_soc_suspend, 1293f775987SManuel Lauss .resume = ac97_soc_resume, 130d2a369cbSMark Brown 131d2a369cbSMark Brown .dapm_widgets = ac97_widgets, 132d2a369cbSMark Brown .num_dapm_widgets = ARRAY_SIZE(ac97_widgets), 133d2a369cbSMark Brown .dapm_routes = ac97_routes, 134d2a369cbSMark Brown .num_dapm_routes = ARRAY_SIZE(ac97_routes), 135dbc6b6adSRichard Purdie }; 136f0fba2adSLiam Girdwood 1377a79e94eSBill Pemberton static int ac97_probe(struct platform_device *pdev) 138f0fba2adSLiam Girdwood { 139f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 140f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 141f0fba2adSLiam Girdwood } 142f0fba2adSLiam Girdwood 1437a79e94eSBill Pemberton static int ac97_remove(struct platform_device *pdev) 144f0fba2adSLiam Girdwood { 145f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 146f0fba2adSLiam Girdwood return 0; 147f0fba2adSLiam Girdwood } 148f0fba2adSLiam Girdwood 149f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 150f0fba2adSLiam Girdwood .driver = { 151f0fba2adSLiam Girdwood .name = "ac97-codec", 152f0fba2adSLiam Girdwood .owner = THIS_MODULE, 153f0fba2adSLiam Girdwood }, 154f0fba2adSLiam Girdwood 155f0fba2adSLiam Girdwood .probe = ac97_probe, 1567a79e94eSBill Pemberton .remove = ac97_remove, 157f0fba2adSLiam Girdwood }; 158f0fba2adSLiam Girdwood 1595bbcc3c0SMark Brown module_platform_driver(ac97_codec_driver); 160dbc6b6adSRichard Purdie 161dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 162dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 163dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 1640afe6b90SMika Westerberg MODULE_ALIAS("platform:ac97-codec"); 165