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> 16dbc6b6adSRichard Purdie #include <linux/kernel.h> 17dbc6b6adSRichard Purdie #include <linux/device.h> 18dbc6b6adSRichard Purdie #include <sound/core.h> 19dbc6b6adSRichard Purdie #include <sound/pcm.h> 20dbc6b6adSRichard Purdie #include <sound/ac97_codec.h> 21dbc6b6adSRichard Purdie #include <sound/initval.h> 22dbc6b6adSRichard Purdie #include <sound/soc.h> 23dbac7cb8SMark Brown #include "ac97.h" 24dbc6b6adSRichard Purdie 255a8ec343SLiam Girdwood #define AC97_VERSION "0.6" 26dbc6b6adSRichard Purdie 27dbc6b6adSRichard Purdie static int ac97_prepare(struct snd_pcm_substream *substream) 28dbc6b6adSRichard Purdie { 29dbc6b6adSRichard Purdie struct snd_pcm_runtime *runtime = substream->runtime; 30dbc6b6adSRichard Purdie struct snd_soc_pcm_runtime *rtd = substream->private_data; 31dbc6b6adSRichard Purdie struct snd_soc_device *socdev = rtd->socdev; 32dbc6b6adSRichard Purdie struct snd_soc_codec *codec = socdev->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 43e550e17fSLiam Girdwood struct snd_soc_dai ac97_dai = { 44dbc6b6adSRichard Purdie .name = "AC97 HiFi", 45a68660e0SLiam Girdwood .type = SND_SOC_DAI_AC97, 46dbc6b6adSRichard Purdie .playback = { 47dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 48dbc6b6adSRichard Purdie .channels_min = 1, 495a8ec343SLiam Girdwood .channels_max = 2, 505a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 515a8ec343SLiam Girdwood .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 52dbc6b6adSRichard Purdie .capture = { 53dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 54dbc6b6adSRichard Purdie .channels_min = 1, 555a8ec343SLiam Girdwood .channels_max = 2, 565a8ec343SLiam Girdwood .rates = STD_AC97_RATES, 575a8ec343SLiam Girdwood .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 58dbc6b6adSRichard Purdie .ops = { 59dbc6b6adSRichard Purdie .prepare = ac97_prepare,}, 60dbc6b6adSRichard Purdie }; 615d0cedeeSGraeme Gregory EXPORT_SYMBOL_GPL(ac97_dai); 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 76dbc6b6adSRichard Purdie static int ac97_soc_probe(struct platform_device *pdev) 77dbc6b6adSRichard Purdie { 78dbc6b6adSRichard Purdie struct snd_soc_device *socdev = platform_get_drvdata(pdev); 79dbc6b6adSRichard Purdie struct snd_soc_codec *codec; 80dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 81dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 82dbc6b6adSRichard Purdie int ret = 0; 83dbc6b6adSRichard Purdie 84dbc6b6adSRichard Purdie printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); 85dbc6b6adSRichard Purdie 86dbc6b6adSRichard Purdie socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 8724c053e7SMark Brown if (!socdev->codec) 88dbc6b6adSRichard Purdie return -ENOMEM; 89dbc6b6adSRichard Purdie codec = socdev->codec; 90dbc6b6adSRichard Purdie mutex_init(&codec->mutex); 91dbc6b6adSRichard Purdie 92dbc6b6adSRichard Purdie codec->name = "AC97"; 93dbc6b6adSRichard Purdie codec->owner = THIS_MODULE; 94dbc6b6adSRichard Purdie codec->dai = &ac97_dai; 95dbc6b6adSRichard Purdie codec->num_dai = 1; 96dbc6b6adSRichard Purdie codec->write = ac97_write; 97dbc6b6adSRichard Purdie codec->read = ac97_read; 98dbc6b6adSRichard Purdie INIT_LIST_HEAD(&codec->dapm_widgets); 99dbc6b6adSRichard Purdie INIT_LIST_HEAD(&codec->dapm_paths); 100dbc6b6adSRichard Purdie 101dbc6b6adSRichard Purdie /* register pcms */ 102dbc6b6adSRichard Purdie ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 103dbc6b6adSRichard Purdie if (ret < 0) 104dbc6b6adSRichard Purdie goto err; 105dbc6b6adSRichard Purdie 106dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 107dbc6b6adSRichard Purdie ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); 108dbc6b6adSRichard Purdie if (ret < 0) 109dbc6b6adSRichard Purdie goto bus_err; 110dbc6b6adSRichard Purdie 111dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 112dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 113dbc6b6adSRichard Purdie if (ret < 0) 114dbc6b6adSRichard Purdie goto bus_err; 115dbc6b6adSRichard Purdie 116dbc6b6adSRichard Purdie ret = snd_soc_register_card(socdev); 117dbc6b6adSRichard Purdie if (ret < 0) 118dbc6b6adSRichard Purdie goto bus_err; 119dbc6b6adSRichard Purdie return 0; 120dbc6b6adSRichard Purdie 121dbc6b6adSRichard Purdie bus_err: 122dbc6b6adSRichard Purdie snd_soc_free_pcms(socdev); 123dbc6b6adSRichard Purdie 124dbc6b6adSRichard Purdie err: 125dbc6b6adSRichard Purdie kfree(socdev->codec->reg_cache); 126dbc6b6adSRichard Purdie kfree(socdev->codec); 127dbc6b6adSRichard Purdie socdev->codec = NULL; 128dbc6b6adSRichard Purdie return ret; 129dbc6b6adSRichard Purdie } 130dbc6b6adSRichard Purdie 131dbc6b6adSRichard Purdie static int ac97_soc_remove(struct platform_device *pdev) 132dbc6b6adSRichard Purdie { 133dbc6b6adSRichard Purdie struct snd_soc_device *socdev = platform_get_drvdata(pdev); 134dbc6b6adSRichard Purdie struct snd_soc_codec *codec = socdev->codec; 135dbc6b6adSRichard Purdie 13624c053e7SMark Brown if (!codec) 137dbc6b6adSRichard Purdie return 0; 138dbc6b6adSRichard Purdie 139dbc6b6adSRichard Purdie snd_soc_free_pcms(socdev); 140dbc6b6adSRichard Purdie kfree(socdev->codec->reg_cache); 141dbc6b6adSRichard Purdie kfree(socdev->codec); 142dbc6b6adSRichard Purdie 143dbc6b6adSRichard Purdie return 0; 144dbc6b6adSRichard Purdie } 145dbc6b6adSRichard Purdie 1463f775987SManuel Lauss #ifdef CONFIG_PM 1473f775987SManuel Lauss static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg) 1483f775987SManuel Lauss { 1493f775987SManuel Lauss struct snd_soc_device *socdev = platform_get_drvdata(pdev); 1503f775987SManuel Lauss 1513f775987SManuel Lauss snd_ac97_suspend(socdev->codec->ac97); 1523f775987SManuel Lauss 1533f775987SManuel Lauss return 0; 1543f775987SManuel Lauss } 1553f775987SManuel Lauss 1563f775987SManuel Lauss static int ac97_soc_resume(struct platform_device *pdev) 1573f775987SManuel Lauss { 1583f775987SManuel Lauss struct snd_soc_device *socdev = platform_get_drvdata(pdev); 1593f775987SManuel Lauss 1603f775987SManuel Lauss snd_ac97_resume(socdev->codec->ac97); 1613f775987SManuel Lauss 1623f775987SManuel Lauss return 0; 1633f775987SManuel Lauss } 1643f775987SManuel Lauss #else 1653f775987SManuel Lauss #define ac97_soc_suspend NULL 1663f775987SManuel Lauss #define ac97_soc_resume NULL 1673f775987SManuel Lauss #endif 1683f775987SManuel Lauss 169dbc6b6adSRichard Purdie struct snd_soc_codec_device soc_codec_dev_ac97 = { 170dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 171dbc6b6adSRichard Purdie .remove = ac97_soc_remove, 1723f775987SManuel Lauss .suspend = ac97_soc_suspend, 1733f775987SManuel Lauss .resume = ac97_soc_resume, 174dbc6b6adSRichard Purdie }; 175dbc6b6adSRichard Purdie EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); 176dbc6b6adSRichard Purdie 177dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 178dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 179dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 180