1dbc6b6adSRichard Purdie /* 2dbc6b6adSRichard Purdie * ac97.c -- ALSA Soc AC97 codec support 3dbc6b6adSRichard Purdie * 4dbc6b6adSRichard Purdie * Copyright 2005 Wolfson Microelectronics PLC. 5dbc6b6adSRichard Purdie * Author: Liam Girdwood 6dbc6b6adSRichard Purdie * liam.girdwood@wolfsonmicro.com or linux@wolfsonmicro.com 7dbc6b6adSRichard Purdie * 8dbc6b6adSRichard Purdie * This program is free software; you can redistribute it and/or modify it 9dbc6b6adSRichard Purdie * under the terms of the GNU General Public License as published by the 10dbc6b6adSRichard Purdie * Free Software Foundation; either version 2 of the License, or (at your 11dbc6b6adSRichard Purdie * option) any later version. 12dbc6b6adSRichard Purdie * 13dbc6b6adSRichard Purdie * Revision history 14dbc6b6adSRichard Purdie * 17th Oct 2005 Initial version. 15dbc6b6adSRichard Purdie * 16dbc6b6adSRichard Purdie * Generic AC97 support. 17dbc6b6adSRichard Purdie */ 18dbc6b6adSRichard Purdie 19dbc6b6adSRichard Purdie #include <linux/init.h> 20dbc6b6adSRichard Purdie #include <linux/kernel.h> 21dbc6b6adSRichard Purdie #include <linux/device.h> 22dbc6b6adSRichard Purdie #include <sound/driver.h> 23dbc6b6adSRichard Purdie #include <sound/core.h> 24dbc6b6adSRichard Purdie #include <sound/pcm.h> 25dbc6b6adSRichard Purdie #include <sound/ac97_codec.h> 26dbc6b6adSRichard Purdie #include <sound/initval.h> 27dbc6b6adSRichard Purdie #include <sound/soc.h> 28dbc6b6adSRichard Purdie 29dbc6b6adSRichard Purdie #define AC97_VERSION "0.5" 30dbc6b6adSRichard Purdie 31dbc6b6adSRichard Purdie #define AC97_DIR \ 32dbc6b6adSRichard Purdie (SND_SOC_DAIDIR_PLAYBACK | SND_SOC_DAIDIR_CAPTURE) 33dbc6b6adSRichard Purdie 34dbc6b6adSRichard Purdie #define AC97_RATES \ 35dbc6b6adSRichard Purdie (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | SNDRV_PCM_RATE_16000 | \ 36dbc6b6adSRichard Purdie SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 37dbc6b6adSRichard Purdie SNDRV_PCM_RATE_48000) 38dbc6b6adSRichard Purdie 39dbc6b6adSRichard Purdie /* may need to expand this */ 40dbc6b6adSRichard Purdie static struct snd_soc_dai_mode soc_ac97[] = { 41dbc6b6adSRichard Purdie {0, 0, SNDRV_PCM_FMTBIT_S16_LE, AC97_RATES}, 42dbc6b6adSRichard Purdie {0, 0, SNDRV_PCM_FMTBIT_S18_3LE, AC97_RATES}, 43dbc6b6adSRichard Purdie {0, 0, SNDRV_PCM_FMTBIT_S20_3LE, AC97_RATES}, 44dbc6b6adSRichard Purdie }; 45dbc6b6adSRichard Purdie 46dbc6b6adSRichard Purdie static int ac97_prepare(struct snd_pcm_substream *substream) 47dbc6b6adSRichard Purdie { 48dbc6b6adSRichard Purdie struct snd_pcm_runtime *runtime = substream->runtime; 49dbc6b6adSRichard Purdie struct snd_soc_pcm_runtime *rtd = substream->private_data; 50dbc6b6adSRichard Purdie struct snd_soc_device *socdev = rtd->socdev; 51dbc6b6adSRichard Purdie struct snd_soc_codec *codec = socdev->codec; 52dbc6b6adSRichard Purdie 53dbc6b6adSRichard Purdie int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? 54dbc6b6adSRichard Purdie AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; 55dbc6b6adSRichard Purdie return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); 56dbc6b6adSRichard Purdie } 57dbc6b6adSRichard Purdie 58dbc6b6adSRichard Purdie static struct snd_soc_codec_dai ac97_dai = { 59dbc6b6adSRichard Purdie .name = "AC97 HiFi", 60dbc6b6adSRichard Purdie .playback = { 61dbc6b6adSRichard Purdie .stream_name = "AC97 Playback", 62dbc6b6adSRichard Purdie .channels_min = 1, 63dbc6b6adSRichard Purdie .channels_max = 2,}, 64dbc6b6adSRichard Purdie .capture = { 65dbc6b6adSRichard Purdie .stream_name = "AC97 Capture", 66dbc6b6adSRichard Purdie .channels_min = 1, 67dbc6b6adSRichard Purdie .channels_max = 2,}, 68dbc6b6adSRichard Purdie .ops = { 69dbc6b6adSRichard Purdie .prepare = ac97_prepare,}, 70dbc6b6adSRichard Purdie .caps = { 71dbc6b6adSRichard Purdie .num_modes = ARRAY_SIZE(soc_ac97), 72dbc6b6adSRichard Purdie .mode = soc_ac97,}, 73dbc6b6adSRichard Purdie }; 74dbc6b6adSRichard Purdie 75dbc6b6adSRichard Purdie static unsigned int ac97_read(struct snd_soc_codec *codec, 76dbc6b6adSRichard Purdie unsigned int reg) 77dbc6b6adSRichard Purdie { 78dbc6b6adSRichard Purdie return soc_ac97_ops.read(codec->ac97, reg); 79dbc6b6adSRichard Purdie } 80dbc6b6adSRichard Purdie 81dbc6b6adSRichard Purdie static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, 82dbc6b6adSRichard Purdie unsigned int val) 83dbc6b6adSRichard Purdie { 84dbc6b6adSRichard Purdie soc_ac97_ops.write(codec->ac97, reg, val); 85dbc6b6adSRichard Purdie return 0; 86dbc6b6adSRichard Purdie } 87dbc6b6adSRichard Purdie 88dbc6b6adSRichard Purdie static int ac97_soc_probe(struct platform_device *pdev) 89dbc6b6adSRichard Purdie { 90dbc6b6adSRichard Purdie struct snd_soc_device *socdev = platform_get_drvdata(pdev); 91dbc6b6adSRichard Purdie struct snd_soc_codec *codec; 92dbc6b6adSRichard Purdie struct snd_ac97_bus *ac97_bus; 93dbc6b6adSRichard Purdie struct snd_ac97_template ac97_template; 94dbc6b6adSRichard Purdie int ret = 0; 95dbc6b6adSRichard Purdie 96dbc6b6adSRichard Purdie printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); 97dbc6b6adSRichard Purdie 98dbc6b6adSRichard Purdie socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); 99dbc6b6adSRichard Purdie if (socdev->codec == NULL) 100dbc6b6adSRichard Purdie return -ENOMEM; 101dbc6b6adSRichard Purdie codec = socdev->codec; 102dbc6b6adSRichard Purdie mutex_init(&codec->mutex); 103dbc6b6adSRichard Purdie 104dbc6b6adSRichard Purdie codec->name = "AC97"; 105dbc6b6adSRichard Purdie codec->owner = THIS_MODULE; 106dbc6b6adSRichard Purdie codec->dai = &ac97_dai; 107dbc6b6adSRichard Purdie codec->num_dai = 1; 108dbc6b6adSRichard Purdie codec->write = ac97_write; 109dbc6b6adSRichard Purdie codec->read = ac97_read; 110dbc6b6adSRichard Purdie INIT_LIST_HEAD(&codec->dapm_widgets); 111dbc6b6adSRichard Purdie INIT_LIST_HEAD(&codec->dapm_paths); 112dbc6b6adSRichard Purdie 113dbc6b6adSRichard Purdie /* register pcms */ 114dbc6b6adSRichard Purdie ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); 115dbc6b6adSRichard Purdie if(ret < 0) 116dbc6b6adSRichard Purdie goto err; 117dbc6b6adSRichard Purdie 118dbc6b6adSRichard Purdie /* add codec as bus device for standard ac97 */ 119dbc6b6adSRichard Purdie ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); 120dbc6b6adSRichard Purdie if(ret < 0) 121dbc6b6adSRichard Purdie goto bus_err; 122dbc6b6adSRichard Purdie 123dbc6b6adSRichard Purdie memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); 124dbc6b6adSRichard Purdie ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); 125dbc6b6adSRichard Purdie if(ret < 0) 126dbc6b6adSRichard Purdie goto bus_err; 127dbc6b6adSRichard Purdie 128dbc6b6adSRichard Purdie ret = snd_soc_register_card(socdev); 129dbc6b6adSRichard Purdie if (ret < 0) 130dbc6b6adSRichard Purdie goto bus_err; 131dbc6b6adSRichard Purdie return 0; 132dbc6b6adSRichard Purdie 133dbc6b6adSRichard Purdie bus_err: 134dbc6b6adSRichard Purdie snd_soc_free_pcms(socdev); 135dbc6b6adSRichard Purdie 136dbc6b6adSRichard Purdie err: 137dbc6b6adSRichard Purdie kfree(socdev->codec->reg_cache); 138dbc6b6adSRichard Purdie kfree(socdev->codec); 139dbc6b6adSRichard Purdie socdev->codec = NULL; 140dbc6b6adSRichard Purdie return ret; 141dbc6b6adSRichard Purdie } 142dbc6b6adSRichard Purdie 143dbc6b6adSRichard Purdie static int ac97_soc_remove(struct platform_device *pdev) 144dbc6b6adSRichard Purdie { 145dbc6b6adSRichard Purdie struct snd_soc_device *socdev = platform_get_drvdata(pdev); 146dbc6b6adSRichard Purdie struct snd_soc_codec *codec = socdev->codec; 147dbc6b6adSRichard Purdie 148dbc6b6adSRichard Purdie if(codec == NULL) 149dbc6b6adSRichard Purdie return 0; 150dbc6b6adSRichard Purdie 151dbc6b6adSRichard Purdie snd_soc_free_pcms(socdev); 152dbc6b6adSRichard Purdie kfree(socdev->codec->reg_cache); 153dbc6b6adSRichard Purdie kfree(socdev->codec); 154dbc6b6adSRichard Purdie 155dbc6b6adSRichard Purdie return 0; 156dbc6b6adSRichard Purdie } 157dbc6b6adSRichard Purdie 158dbc6b6adSRichard Purdie struct snd_soc_codec_device soc_codec_dev_ac97= { 159dbc6b6adSRichard Purdie .probe = ac97_soc_probe, 160dbc6b6adSRichard Purdie .remove = ac97_soc_remove, 161dbc6b6adSRichard Purdie }; 162dbc6b6adSRichard Purdie 163dbc6b6adSRichard Purdie EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); 164dbc6b6adSRichard Purdie 165dbc6b6adSRichard Purdie MODULE_DESCRIPTION("Soc Generic AC97 driver"); 166dbc6b6adSRichard Purdie MODULE_AUTHOR("Liam Girdwood"); 167dbc6b6adSRichard Purdie MODULE_LICENSE("GPL"); 168