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/*
* Copyright (C) 2014 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/of.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include "i2s.h"
static int odroidx2_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 bfs, rfs, ret;
unsigned long rclk;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_U24:
case SNDRV_PCM_FORMAT_S24:
bfs = 48;
break;
case SNDRV_PCM_FORMAT_U16_LE:
case SNDRV_PCM_FORMAT_S16_LE:
bfs = 32;
break;
default:
return -EINVAL;
}
switch (params_rate(params)) {
case 16000:
case 22050:
case 24000:
case 32000:
case 44100:
case 48000:
case 88200:
case 96000:
if (bfs == 48)
rfs = 384;
else
rfs = 256;
break;
case 64000:
rfs = 384;
break;
case 8000:
case 11025:
case 12000:
if (bfs == 48)
rfs = 768;
else
rfs = 512;
break;
default:
return -EINVAL;
}
rclk = params_rate(params) * rfs;
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
| SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, rclk, SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
0, SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, SAMSUNG_I2S_DIV_BCLK, bfs);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops odroidx2_ops = {
.hw_params = odroidx2_hw_params,
};
static struct snd_soc_dai_link odroidx2_dai[] = {
{
.name = "MAX98090",
.stream_name = "MAX98090 PCM",
.codec_dai_name = "HiFi",
.ops = &odroidx2_ops,
},
};
static struct snd_soc_card odroidx2 = {
.name = "odroidx2",
.owner = THIS_MODULE,
.dai_link = odroidx2_dai,
.num_links = ARRAY_SIZE(odroidx2_dai),
};
static int odroidx2_audio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct snd_soc_card *card = &odroidx2;
if (!np)
return -ENODEV;
card->dev = &pdev->dev;
odroidx2_dai[0].codec_name = NULL;
odroidx2_dai[0].codec_of_node = of_parse_phandle(np,
"samsung,audio-codec", 0);
if (!odroidx2_dai[0].codec_of_node) {
dev_err(&pdev->dev,
"Property 'samsung,audio-codec' missing or invalid\n");
return -EINVAL;
}
odroidx2_dai[0].cpu_name = NULL;
odroidx2_dai[0].cpu_of_node = of_parse_phandle(np,
"samsung,i2s-controller", 0);
if (!odroidx2_dai[0].cpu_of_node) {
dev_err(&pdev->dev,
"Property 'samsung,i2s-controller' missing or invalid\n");
return -EINVAL;
}
odroidx2_dai[0].platform_of_node = odroidx2_dai[0].cpu_of_node;
return snd_soc_register_card(card);
}
static int odroidx2_audio_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
return 0;
}
static const struct of_device_id odroidx2_audio_of_match[] = {
{ .compatible = "samsung,odroidx2-audio", },
{ },
};
MODULE_DEVICE_TABLE(of, odroid_audio_of_match);
static struct platform_driver odroidx2_audio_driver = {
.driver = {
.name = "odroidx2-audio",
.owner = THIS_MODULE,
.of_match_table = odroidx2_audio_of_match,
},
.probe = odroidx2_audio_probe,
.remove = odroidx2_audio_remove,
};
module_platform_driver(odroidx2_audio_driver);
MODULE_AUTHOR("zhen1.chen@samsung.com");
MODULE_DESCRIPTION("ALSA SoC Odroidx2 Audio Support");
MODULE_LICENSE("GPL v2");
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