| /* |
| * ac97.c -- ALSA Soc AC97 codec support |
| * |
| * Copyright 2005 Wolfson Microelectronics PLC. |
| * Author: Liam Girdwood <lrg@slimlogic.co.uk> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by the |
| * Free Software Foundation; either version 2 of the License, or (at your |
| * option) any later version. |
| * |
| * Generic AC97 support. |
| */ |
| |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/device.h> |
| #include <sound/core.h> |
| #include <sound/pcm.h> |
| #include <sound/ac97_codec.h> |
| #include <sound/initval.h> |
| #include <sound/soc.h> |
| #include "ac97.h" |
| |
| #define AC97_VERSION "0.6" |
| |
| static int ac97_prepare(struct snd_pcm_substream *substream, |
| struct snd_soc_dai *dai) |
| { |
| struct snd_pcm_runtime *runtime = substream->runtime; |
| struct snd_soc_pcm_runtime *rtd = substream->private_data; |
| struct snd_soc_device *socdev = rtd->socdev; |
| struct snd_soc_codec *codec = socdev->card->codec; |
| |
| int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ? |
| AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE; |
| return snd_ac97_set_rate(codec->ac97, reg, runtime->rate); |
| } |
| |
| #define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
| SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\ |
| SNDRV_PCM_RATE_48000) |
| |
| struct snd_soc_dai ac97_dai = { |
| .name = "AC97 HiFi", |
| .ac97_control = 1, |
| .playback = { |
| .stream_name = "AC97 Playback", |
| .channels_min = 1, |
| .channels_max = 2, |
| .rates = STD_AC97_RATES, |
| .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
| .capture = { |
| .stream_name = "AC97 Capture", |
| .channels_min = 1, |
| .channels_max = 2, |
| .rates = STD_AC97_RATES, |
| .formats = SNDRV_PCM_FMTBIT_S16_LE,}, |
| .ops = { |
| .prepare = ac97_prepare,}, |
| }; |
| EXPORT_SYMBOL_GPL(ac97_dai); |
| |
| static unsigned int ac97_read(struct snd_soc_codec *codec, |
| unsigned int reg) |
| { |
| return soc_ac97_ops.read(codec->ac97, reg); |
| } |
| |
| static int ac97_write(struct snd_soc_codec *codec, unsigned int reg, |
| unsigned int val) |
| { |
| soc_ac97_ops.write(codec->ac97, reg, val); |
| return 0; |
| } |
| |
| static int ac97_soc_probe(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec; |
| struct snd_ac97_bus *ac97_bus; |
| struct snd_ac97_template ac97_template; |
| int ret = 0; |
| |
| printk(KERN_INFO "AC97 SoC Audio Codec %s\n", AC97_VERSION); |
| |
| socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); |
| if (!socdev->card->codec) |
| return -ENOMEM; |
| codec = socdev->card->codec; |
| mutex_init(&codec->mutex); |
| |
| codec->name = "AC97"; |
| codec->owner = THIS_MODULE; |
| codec->dai = &ac97_dai; |
| codec->num_dai = 1; |
| codec->write = ac97_write; |
| codec->read = ac97_read; |
| INIT_LIST_HEAD(&codec->dapm_widgets); |
| INIT_LIST_HEAD(&codec->dapm_paths); |
| |
| /* register pcms */ |
| ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); |
| if (ret < 0) |
| goto err; |
| |
| /* add codec as bus device for standard ac97 */ |
| ret = snd_ac97_bus(codec->card, 0, &soc_ac97_ops, NULL, &ac97_bus); |
| if (ret < 0) |
| goto bus_err; |
| |
| memset(&ac97_template, 0, sizeof(struct snd_ac97_template)); |
| ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97); |
| if (ret < 0) |
| goto bus_err; |
| |
| ret = snd_soc_init_card(socdev); |
| if (ret < 0) |
| goto bus_err; |
| return 0; |
| |
| bus_err: |
| snd_soc_free_pcms(socdev); |
| |
| err: |
| kfree(socdev->card->codec); |
| socdev->card->codec = NULL; |
| return ret; |
| } |
| |
| static int ac97_soc_remove(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| struct snd_soc_codec *codec = socdev->card->codec; |
| |
| if (!codec) |
| return 0; |
| |
| snd_soc_free_pcms(socdev); |
| kfree(socdev->card->codec); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM |
| static int ac97_soc_suspend(struct platform_device *pdev, pm_message_t msg) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| |
| snd_ac97_suspend(socdev->card->codec->ac97); |
| |
| return 0; |
| } |
| |
| static int ac97_soc_resume(struct platform_device *pdev) |
| { |
| struct snd_soc_device *socdev = platform_get_drvdata(pdev); |
| |
| snd_ac97_resume(socdev->card->codec->ac97); |
| |
| return 0; |
| } |
| #else |
| #define ac97_soc_suspend NULL |
| #define ac97_soc_resume NULL |
| #endif |
| |
| struct snd_soc_codec_device soc_codec_dev_ac97 = { |
| .probe = ac97_soc_probe, |
| .remove = ac97_soc_remove, |
| .suspend = ac97_soc_suspend, |
| .resume = ac97_soc_resume, |
| }; |
| EXPORT_SYMBOL_GPL(soc_codec_dev_ac97); |
| |
| MODULE_DESCRIPTION("Soc Generic AC97 driver"); |
| MODULE_AUTHOR("Liam Girdwood"); |
| MODULE_LICENSE("GPL"); |