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/*
* sound/soc/samsung/smdk_wm8580pcm.c
*
* Copyright (c) 2011 Samsung Electronics Co. Ltd
*
* 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_params.h>
#include <sound/pcm.h>
#include <asm/mach-types.h>
#include "../codecs/wm8580.h"
#include "dma.h"
#include "pcm.h"
/*
* Board Settings:
* o '1' means 'ON'
* o '0' means 'OFF'
* o 'X' means 'Don't care'
*
* SMDK6410 Base B/D: CFG1-0000, CFG2-1111
* SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
*/
#define SMDK_WM8580_EXT_OSC 12000000
#define SMDK_WM8580_EXT_MCLK 4096000
#define SMDK_WM8580_EXT_VOICE 2048000
static unsigned long mclk_freq;
static unsigned long xtal_freq;
/*
* If MCLK clock directly gets from XTAL, we don't have to use PLL
* to make MCLK, but if XTAL clock source connects with other codec
* pin (like XTI), we should have to set codec's PLL to make MCLK.
* Because Samsung SoC does not support pcmcdclk output like I2S.
*/
static int smdk_wm8580_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;
int rfs, ret;
switch (params_rate(params)) {
case 8000:
break;
default:
printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n",
__func__, __LINE__, params_rate(params));
return -EINVAL;
}
rfs = mclk_freq / params_rate(params) / 2;
if (mclk_freq == xtal_freq) {
ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK,
mclk_freq, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
WM8580_CLKSRC_MCLK);
if (ret < 0)
return ret;
} else {
ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
mclk_freq, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
WM8580_CLKSRC_PLLA);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
xtal_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_wm8580_pcm_ops = {
.hw_params = smdk_wm8580_pcm_hw_params,
};
#define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \
SND_SOC_DAIFMT_CBS_CFS)
static struct snd_soc_dai_link smdk_dai[] = {
{
.name = "WM8580 PAIF PCM RX",
.stream_name = "Playback",
.cpu_dai_name = "samsung-pcm.0",
.codec_dai_name = "wm8580-hifi-playback",
.platform_name = "samsung-audio",
.codec_name = "wm8580.0-001b",
.dai_fmt = SMDK_DAI_FMT,
.ops = &smdk_wm8580_pcm_ops,
}, {
.name = "WM8580 PAIF PCM TX",
.stream_name = "Capture",
.cpu_dai_name = "samsung-pcm.0",
.codec_dai_name = "wm8580-hifi-capture",
.platform_name = "samsung-pcm.0",
.codec_name = "wm8580.0-001b",
.dai_fmt = SMDK_DAI_FMT,
.ops = &smdk_wm8580_pcm_ops,
},
};
static struct snd_soc_card smdk_pcm = {
.name = "SMDK-PCM",
.owner = THIS_MODULE,
.dai_link = smdk_dai,
.num_links = 2,
};
/*
* After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
* is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
* 2.0484Mhz, directly with MCLK both Codec and SoC.
*/
static int snd_smdk_probe(struct platform_device *pdev)
{
int ret = 0;
xtal_freq = SMDK_WM8580_EXT_OSC;
mclk_freq = SMDK_WM8580_EXT_MCLK;
if (machine_is_smdkc110() || machine_is_smdkv210())
xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE;
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 WM8580 for PCM");
MODULE_LICENSE("GPL");
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