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/*
* linux/sound/soc/hisilicon/hi6210-hdmi-card.c
*
* Copyright (C) 2015 Linaro, 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, version 2 of the License.
*/
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/soc.h>
static int hdmi_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 *cpu_dai = rtd->cpu_dai;
int 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)
return ret;
/* set i2s system clock */
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 24576000, SND_SOC_CLOCK_IN);
if (ret)
return ret;
return 0;
}
/* operations of sound device */
static struct snd_soc_ops hdmi_ops = {
.hw_params = hdmi_hw_params,
};
static struct snd_soc_dai_link hi6210_hdmi_dai_link = {
.name = "hi6210-hdmi-dai-link", /* "codec name" */
.stream_name = "hdmi", /* stream name */
.cpu_dai_name ="f7118000.hi6210_i2s",
.codec_name = "0.hi6210_hdmi_card",
.be_id = 0,
.ops = &hdmi_ops,
.codec_dai_name = "hi6210_hdmi_dai",
.platform_name = "f7118000.hi6210_i2s",
};
static struct snd_soc_card snd_soc_hi6210_hdmi = {
.name = "hi6210-hdmi",
.owner = THIS_MODULE,
.dai_link = &hi6210_hdmi_dai_link,
.num_links = 1,
};
static const struct snd_soc_dai_ops hi6210_hdmi_dai_ops = {
};
static struct snd_soc_dai_driver hi6210_hdmi_dai = {
.name = "hi6210_hdmi_dai",
.playback = {
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &hi6210_hdmi_dai_ops,
};
static struct snd_soc_codec_driver hi6210_hdmi_codec;
static int hi6210_hdmi_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snd_soc_hi6210_hdmi;
int ret;
ret = snd_soc_register_codec(&pdev->dev, &hi6210_hdmi_codec,
&hi6210_hdmi_dai, 1);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_codec failed (%d)\n", ret);
return ret;
}
card->dev = &pdev->dev;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
snd_soc_unregister_codec(&pdev->dev);
card->dev = NULL;
return ret;
}
return 0;
}
static int hi6210_hdmi_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
snd_soc_unregister_codec(&pdev->dev);
card->dev = NULL;
return 0;
}
static const struct of_device_id hi6210_hdmi_dt_ids[] = {
{ .compatible = "hisilicon,hi6210-hdmi-audio-card" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, hi6210_hdmi_dt_ids);
static struct platform_driver hi6210_hdmi_driver = {
.driver = {
.name = "hi6210-hdmi-audio",
.owner = THIS_MODULE,
.of_match_table = hi6210_hdmi_dt_ids,
},
.probe = hi6210_hdmi_probe,
.remove = hi6210_hdmi_remove,
};
module_platform_driver(hi6210_hdmi_driver);
MODULE_AUTHOR("andy.green@linaro.org");
MODULE_DESCRIPTION("Hisilicon HDMI machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:hi6210-hdmi-audio");
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