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> 19dbc6b6adSRichard Purdie #include <sound/core.h> 20dbc6b6adSRichard Purdie #include <sound/pcm.h> 21dbc6b6adSRichard Purdie #include <sound/ac97_codec.h> 22dbc6b6adSRichard Purdie #include <sound/initval.h> 23dbc6b6adSRichard Purdie #include <sound/soc.h> 24dbc6b6adSRichard Purdie 25dee89c4dSMark Brown static int ac97_prepare(struct snd_pcm_substream *substream, 26dee89c4dSMark Brown struct snd_soc_dai *dai) 27dbc6b6adSRichard Purdie { 28dbc6b6adSRichard Purdie struct snd_pcm_runtime *runtime = substream->runtime; 29dbc6b6adSRichard Purdie struct snd_soc_pcm_runtime *rtd = substream->private_data; 30f0fba2adSLiam Girdwood struct snd_soc_codec *codec = rtd->codec; 31dbc6b6adSRichard Purdie 32dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 33dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 34dbc6b6adSRichard Purdie return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); 35dbc6b6adSRichard Purdie } 36dbc6b6adSRichard Purdie 375a8ec343SLiam Girdwood #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 3824c053e7SMark Brown SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ 3924c053e7SMark Brown SNDRV_PCM_RATE_48000) 405a8ec343SLiam Girdwood 416335d055SEric Miao static struct snd_soc_dai_ops ac97_dai_ops = { 426335d055SEric Miao .prepare = ac97_prepare, 436335d055SEric Miao }; 446335d055SEric Miao 45f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 46f0fba2adSLiam Girdwood .name = "ac97-hifi", 473ba9e10aSMark Brown .ac97_control = 1, 48dbc6b6adSRichard Purdie .playback = { 49dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 50dbc6b6adSRichard Purdie .channels_min = 1, 515a8ec343SLiam Girdwood .channels_max = 2, 525a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5333f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 54dbc6b6adSRichard Purdie .capture = { 55dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 56dbc6b6adSRichard Purdie .channels_min = 1, 575a8ec343SLiam Girdwood .channels_max = 2, 585a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5933f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 606335d055SEric Miao .ops = &ac97_dai_ops, 61dbc6b6adSRichard Purdie }; 62dbc6b6adSRichard Purdie 63dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 64dbc6b6adSRichard Purdie unsigned int reg) 65dbc6b6adSRichard Purdie { 66dbc6b6adSRichard Purdie return soc_ac97_ops.read(codec->ac97, reg); 67dbc6b6adSRichard Purdie } 68dbc6b6adSRichard Purdie 69dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 70dbc6b6adSRichard Purdie unsigned int val) 71dbc6b6adSRichard Purdie { 72dbc6b6adSRichard Purdie soc_ac97_ops.write(codec->ac97, reg, val); 73dbc6b6adSRichard Purdie return 0; 74dbc6b6adSRichard Purdie } 75dbc6b6adSRichard Purdie 76f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 77dbc6b6adSRichard Purdie { 78dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 79dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 80f0fba2adSLiam Girdwood int ret; 81dbc6b6adSRichard Purdie 82dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 83f0fba2adSLiam Girdwood ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &ac97_bus); 84dbc6b6adSRichard Purdie if (ret < 0) 85f0fba2adSLiam Girdwood return ret; 86dbc6b6adSRichard Purdie 87dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 88dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 89dbc6b6adSRichard Purdie if (ret < 0) 90dbc6b6adSRichard Purdie return ret; 91f0fba2adSLiam Girdwood 92f0fba2adSLiam Girdwood return 0; 93dbc6b6adSRichard Purdie } 94dbc6b6adSRichard Purdie 95f0fba2adSLiam Girdwood static int ac97_soc_remove(struct snd_soc_codec *codec) 96dbc6b6adSRichard Purdie { 97dbc6b6adSRichard Purdie return 0; 98dbc6b6adSRichard Purdie } 99dbc6b6adSRichard Purdie 1003f775987SManuel Lauss #ifdef CONFIG_PM 101f0fba2adSLiam Girdwood static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) 1023f775987SManuel Lauss { 103f0fba2adSLiam Girdwood snd_ac97_suspend(codec->ac97); 1043f775987SManuel Lauss 1053f775987SManuel Lauss return 0; 1063f775987SManuel Lauss } 1073f775987SManuel Lauss 108f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1093f775987SManuel Lauss { 110f0fba2adSLiam Girdwood snd_ac97_resume(codec->ac97); 1113f775987SManuel Lauss 1123f775987SManuel Lauss return 0; 1133f775987SManuel Lauss } 1143f775987SManuel Lauss #else 1153f775987SManuel Lauss #define ac97_soc_suspend NULL 1163f775987SManuel Lauss #define ac97_soc_resume NULL 1173f775987SManuel Lauss #endif 1183f775987SManuel Lauss 119f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 120f0fba2adSLiam Girdwood .write = ac97_write, 121f0fba2adSLiam Girdwood .read = ac97_read, 122dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 123dbc6b6adSRichard Purdie .remove = ac97_soc_remove, 1243f775987SManuel Lauss .suspend = ac97_soc_suspend, 1253f775987SManuel Lauss .resume = ac97_soc_resume, 126dbc6b6adSRichard Purdie }; 127f0fba2adSLiam Girdwood 128f0fba2adSLiam Girdwood static __devinit int ac97_probe(struct platform_device *pdev) 129f0fba2adSLiam Girdwood { 130f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 131f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 132f0fba2adSLiam Girdwood } 133f0fba2adSLiam Girdwood 134f0fba2adSLiam Girdwood static int __devexit ac97_remove(struct platform_device *pdev) 135f0fba2adSLiam Girdwood { 136f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 137f0fba2adSLiam Girdwood return 0; 138f0fba2adSLiam Girdwood } 139f0fba2adSLiam Girdwood 140f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 141f0fba2adSLiam Girdwood .driver = { 142f0fba2adSLiam Girdwood .name = "ac97-codec", 143f0fba2adSLiam Girdwood .owner = THIS_MODULE, 144f0fba2adSLiam Girdwood }, 145f0fba2adSLiam Girdwood 146f0fba2adSLiam Girdwood .probe = ac97_probe, 147f0fba2adSLiam Girdwood .remove = __devexit_p(ac97_remove), 148f0fba2adSLiam Girdwood }; 149f0fba2adSLiam Girdwood 150f0fba2adSLiam Girdwood static int __init ac97_init(void) 151f0fba2adSLiam Girdwood { 152f0fba2adSLiam Girdwood return platform_driver_register(&ac97_codec_driver); 153f0fba2adSLiam Girdwood } 154f0fba2adSLiam Girdwood module_init(ac97_init); 155f0fba2adSLiam Girdwood 156f0fba2adSLiam Girdwood static void __exit ac97_exit(void) 157f0fba2adSLiam Girdwood { 158f0fba2adSLiam Girdwood platform_driver_unregister(&ac97_codec_driver); 159f0fba2adSLiam Girdwood } 160f0fba2adSLiam Girdwood module_exit(ac97_exit); 161dbc6b6adSRichard Purdie 162dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 163dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 164dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 1650afe6b90SMika Westerberg MODULE_ALIAS("platform:ac97-codec"); 166