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/*
* sound/soc/samsung/smdk_wm8994pcm.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd
* http://www.samsung.com
*
* 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.
*/
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "../codecs/wm8994.h"
#include "pcm.h"
/*
* Board Settings:
* o '1' means 'ON'
* o '0' means 'OFF'
* o 'X' means 'Don't care'
*
* SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
*/
/*
* Configure audio route as :-
* $ amixer sset 'DAC1' on,on
* $ amixer sset 'Right Headphone Mux' 'DAC'
* $ amixer sset 'Left Headphone Mux' 'DAC'
* $ amixer sset 'DAC1R Mixer AIF1.1' on
* $ amixer sset 'DAC1L Mixer AIF1.1' on
* $ amixer sset 'IN2L' on
* $ amixer sset 'IN2L PGA IN2LN' on
* $ amixer sset 'MIXINL IN2L' on
* $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
* $ amixer sset 'IN2R' on
* $ amixer sset 'IN2R PGA IN2RN' on
* $ amixer sset 'MIXINR IN2R' on
* $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
*/
/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
#define SMDK_WM8994_FREQ 16934400
static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned long mclk_freq;
int rfs, ret;
switch(params_rate(params)) {
case 8000:
rfs = 512;
break;
default:
dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
__func__, __LINE__, params_rate(params));
return -EINVAL;
}
mclk_freq = params_rate(params) * rfs;
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
mclk_freq, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
SMDK_WM8994_FREQ, mclk_freq);
if (ret < 0)
return ret;
/* Set PCM source clock on CPU */
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
mclk_freq, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* Set SCLK_DIV for making bclk */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops smdk_wm8994_pcm_ops = {
.hw_params = smdk_wm8994_pcm_hw_params,
};
static struct snd_soc_dai_link smdk_dai[] = {
{
.name = "WM8994 PAIF PCM",
.stream_name = "Primary PCM",
.cpu_dai_name = "samsung-pcm.0",
.codec_dai_name = "wm8994-aif1",
.platform_name = "samsung-pcm.0",
.codec_name = "wm8994-codec",
.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &smdk_wm8994_pcm_ops,
},
};
static struct snd_soc_card smdk_pcm = {
.name = "SMDK-PCM",
.owner = THIS_MODULE,
.dai_link = smdk_dai,
.num_links = 1,
};
static int snd_smdk_probe(struct platform_device *pdev)
{
int ret = 0;
smdk_pcm.dev = &pdev->dev;
ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
if (ret)
dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
return ret;
}
static struct platform_driver snd_smdk_driver = {
.driver = {
.name = "samsung-smdk-pcm",
},
.probe = snd_smdk_probe,
};
module_platform_driver(snd_smdk_driver);
MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
MODULE_LICENSE("GPL");
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