mirror of https://gitee.com/openkylin/linux.git
130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
/*
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* DB1200 ASoC audio fabric support code.
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*
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* (c) 2008-9 Manuel Lauss <manuel.lauss@gmail.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-au1x00/au1000.h>
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#include <asm/mach-au1x00/au1xxx_psc.h>
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#include <asm/mach-au1x00/au1xxx_dbdma.h>
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#include <asm/mach-db1x00/bcsr.h>
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#include "../codecs/wm8731.h"
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#include "psc.h"
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/*------------------------- AC97 PART ---------------------------*/
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static struct snd_soc_dai_link db1200_ac97_dai = {
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.name = "AC97",
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.stream_name = "AC97 HiFi",
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.codec_dai_name = "ac97-hifi",
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.cpu_dai_name = "au1xpsc_ac97.1",
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.platform_name = "au1xpsc-pcm.1",
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.codec_name = "ac97-codec.1",
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};
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static struct snd_soc_card db1200_ac97_machine = {
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.name = "DB1200_AC97",
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.dai_link = &db1200_ac97_dai,
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.num_links = 1,
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};
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/*------------------------- I2S PART ---------------------------*/
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static int db1200_i2s_startup(struct snd_pcm_substream *substream)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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int ret;
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/* WM8731 has its own 12MHz crystal */
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snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL,
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12000000, SND_SOC_CLOCK_IN);
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/* codec is bitclock and lrclk master */
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ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_LEFT_J |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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goto out;
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ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_LEFT_J |
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SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
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if (ret < 0)
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goto out;
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ret = 0;
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out:
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return ret;
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}
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static struct snd_soc_ops db1200_i2s_wm8731_ops = {
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.startup = db1200_i2s_startup,
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};
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static struct snd_soc_dai_link db1200_i2s_dai = {
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.name = "WM8731",
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.stream_name = "WM8731 PCM",
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.codec_dai_name = "wm8731-hifi",
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.cpu_dai_name = "au1xpsc_i2s.1",
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.platform_name = "au1xpsc-pcm.1",
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.codec_name = "wm8731-codec.0-001b",
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.ops = &db1200_i2s_wm8731_ops,
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};
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static struct snd_soc_card db1200_i2s_machine = {
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.name = "DB1200_I2S",
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.dai_link = &db1200_i2s_dai,
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.num_links = 1,
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};
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/*------------------------- COMMON PART ---------------------------*/
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static struct platform_device *db1200_asoc_dev;
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static int __init db1200_audio_load(void)
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{
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int ret;
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ret = -ENOMEM;
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db1200_asoc_dev = platform_device_alloc("soc-audio", 1); /* PSC1 */
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if (!db1200_asoc_dev)
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goto out;
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/* DB1200 board setup set PSC1MUX to preferred audio device */
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if (bcsr_read(BCSR_RESETS) & BCSR_RESETS_PSC1MUX)
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platform_set_drvdata(db1200_asoc_dev, &db1200_i2s_machine);
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else
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platform_set_drvdata(db1200_asoc_dev, &db1200_ac97_machine);
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ret = platform_device_add(db1200_asoc_dev);
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if (ret) {
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platform_device_put(db1200_asoc_dev);
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db1200_asoc_dev = NULL;
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}
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out:
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return ret;
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}
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static void __exit db1200_audio_unload(void)
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{
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platform_device_unregister(db1200_asoc_dev);
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}
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module_init(db1200_audio_load);
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module_exit(db1200_audio_unload);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("DB1200 ASoC audio support");
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MODULE_AUTHOR("Manuel Lauss");
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