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 255a8ec343SLiam Girdwood #define AC97_VERSION "0.6" 26dbc6b6adSRichard Purdie 27dee89c4dSMark Brown static int ac97_prepare(struct snd_pcm_substream *substream, 28dee89c4dSMark Brown struct snd_soc_dai *dai) 29dbc6b6adSRichard Purdie { 30dbc6b6adSRichard Purdie struct snd_pcm_runtime *runtime = substream->runtime; 31dbc6b6adSRichard Purdie struct snd_soc_pcm_runtime *rtd = substream->private_data; 32f0fba2adSLiam Girdwood struct snd_soc_codec *codec = rtd->codec; 33dbc6b6adSRichard Purdie 34dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 35dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 36dbc6b6adSRichard Purdie return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); 37dbc6b6adSRichard Purdie } 38dbc6b6adSRichard Purdie 395a8ec343SLiam Girdwood #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 4024c053e7SMark Brown SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ 4124c053e7SMark Brown SNDRV_PCM_RATE_48000) 425a8ec343SLiam Girdwood 436335d055SEric Miao static struct snd_soc_dai_ops ac97_dai_ops = { 446335d055SEric Miao .prepare = ac97_prepare, 456335d055SEric Miao }; 466335d055SEric Miao 47f0fba2adSLiam Girdwood static struct snd_soc_dai_driver ac97_dai = { 48f0fba2adSLiam Girdwood .name = "ac97-hifi", 493ba9e10aSMark Brown .ac97_control = 1, 50dbc6b6adSRichard Purdie .playback = { 51dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 52dbc6b6adSRichard Purdie .channels_min = 1, 535a8ec343SLiam Girdwood .channels_max = 2, 545a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 5533f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 56dbc6b6adSRichard Purdie .capture = { 57dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 58dbc6b6adSRichard Purdie .channels_min = 1, 595a8ec343SLiam Girdwood .channels_max = 2, 605a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 6133f503c9SMark Brown .formats = SND_SOC_STD_AC97_FMTS,}, 626335d055SEric Miao .ops = &ac97_dai_ops, 63dbc6b6adSRichard Purdie }; 64dbc6b6adSRichard Purdie 65dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 66dbc6b6adSRichard Purdie unsigned int reg) 67dbc6b6adSRichard Purdie { 68dbc6b6adSRichard Purdie return soc_ac97_ops.read(codec->ac97, reg); 69dbc6b6adSRichard Purdie } 70dbc6b6adSRichard Purdie 71dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 72dbc6b6adSRichard Purdie unsigned int val) 73dbc6b6adSRichard Purdie { 74dbc6b6adSRichard Purdie soc_ac97_ops.write(codec->ac97, reg, val); 75dbc6b6adSRichard Purdie return 0; 76dbc6b6adSRichard Purdie } 77dbc6b6adSRichard Purdie 78f0fba2adSLiam Girdwood static int ac97_soc_probe(struct snd_soc_codec *codec) 79dbc6b6adSRichard Purdie { 80dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 81dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 82f0fba2adSLiam Girdwood int ret; 83dbc6b6adSRichard Purdie 84dbc6b6adSRichard Purdie printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); 85dbc6b6adSRichard Purdie 86f0fba2adSLiam Girdwood ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0); 87f0fba2adSLiam Girdwood if (ret < 0) { 88f0fba2adSLiam Girdwood printk(KERN_ERR "ASoC: failed to init gen ac97 glue\n"); 89f0fba2adSLiam Girdwood return ret; 90f0fba2adSLiam Girdwood } 91dbc6b6adSRichard Purdie 92dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 93f0fba2adSLiam Girdwood ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, 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 105f0fba2adSLiam Girdwood static int ac97_soc_remove(struct snd_soc_codec *codec) 106dbc6b6adSRichard Purdie { 107dbc6b6adSRichard Purdie return 0; 108dbc6b6adSRichard Purdie } 109dbc6b6adSRichard Purdie 1103f775987SManuel Lauss #ifdef CONFIG_PM 111f0fba2adSLiam Girdwood static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) 1123f775987SManuel Lauss { 113f0fba2adSLiam Girdwood snd_ac97_suspend(codec->ac97); 1143f775987SManuel Lauss 1153f775987SManuel Lauss return 0; 1163f775987SManuel Lauss } 1173f775987SManuel Lauss 118f0fba2adSLiam Girdwood static int ac97_soc_resume(struct snd_soc_codec *codec) 1193f775987SManuel Lauss { 120f0fba2adSLiam Girdwood snd_ac97_resume(codec->ac97); 1213f775987SManuel Lauss 1223f775987SManuel Lauss return 0; 1233f775987SManuel Lauss } 1243f775987SManuel Lauss #else 1253f775987SManuel Lauss #define ac97_soc_suspend NULL 1263f775987SManuel Lauss #define ac97_soc_resume NULL 1273f775987SManuel Lauss #endif 1283f775987SManuel Lauss 129f0fba2adSLiam Girdwood static struct snd_soc_codec_driver soc_codec_dev_ac97 = { 130f0fba2adSLiam Girdwood .write = ac97_write, 131f0fba2adSLiam Girdwood .read = ac97_read, 132dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 133dbc6b6adSRichard Purdie .remove = ac97_soc_remove, 1343f775987SManuel Lauss .suspend = ac97_soc_suspend, 1353f775987SManuel Lauss .resume = ac97_soc_resume, 136dbc6b6adSRichard Purdie }; 137f0fba2adSLiam Girdwood 138f0fba2adSLiam Girdwood static __devinit int ac97_probe(struct platform_device *pdev) 139f0fba2adSLiam Girdwood { 140f0fba2adSLiam Girdwood return snd_soc_register_codec(&pdev->dev, 141f0fba2adSLiam Girdwood &soc_codec_dev_ac97, &ac97_dai, 1); 142f0fba2adSLiam Girdwood } 143f0fba2adSLiam Girdwood 144f0fba2adSLiam Girdwood static int __devexit ac97_remove(struct platform_device *pdev) 145f0fba2adSLiam Girdwood { 146f0fba2adSLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 147f0fba2adSLiam Girdwood return 0; 148f0fba2adSLiam Girdwood } 149f0fba2adSLiam Girdwood 150f0fba2adSLiam Girdwood static struct platform_driver ac97_codec_driver = { 151f0fba2adSLiam Girdwood .driver = { 152f0fba2adSLiam Girdwood .name = "ac97-codec", 153f0fba2adSLiam Girdwood .owner = THIS_MODULE, 154f0fba2adSLiam Girdwood }, 155f0fba2adSLiam Girdwood 156f0fba2adSLiam Girdwood .probe = ac97_probe, 157f0fba2adSLiam Girdwood .remove = __devexit_p(ac97_remove), 158f0fba2adSLiam Girdwood }; 159f0fba2adSLiam Girdwood 160f0fba2adSLiam Girdwood static int __init ac97_init(void) 161f0fba2adSLiam Girdwood { 162f0fba2adSLiam Girdwood return platform_driver_register(&ac97_codec_driver); 163f0fba2adSLiam Girdwood } 164f0fba2adSLiam Girdwood module_init(ac97_init); 165f0fba2adSLiam Girdwood 166f0fba2adSLiam Girdwood static void __exit ac97_exit(void) 167f0fba2adSLiam Girdwood { 168f0fba2adSLiam Girdwood platform_driver_unregister(&ac97_codec_driver); 169f0fba2adSLiam Girdwood } 170f0fba2adSLiam Girdwood module_exit(ac97_exit); 171dbc6b6adSRichard Purdie 172dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 173dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 174dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 175