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// SPDX-License-Identifier: GPL-2.0-only
/*
* ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
*
* Based on ALSA SoC SPDIF DIT driver
*
* This driver is used by controllers which can operate in DIR (SPDI/F) where
* no codec is needed. This file provides stub codec that can be used
* in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
*
* Author: Vipin Kumar, <vipin.kumar@st.com>
* Copyright: (C) 2012 ST Microelectronics
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <linux/of.h>
static const struct snd_soc_dapm_widget dir_widgets[] = {
SND_SOC_DAPM_INPUT("spdif-in"),
};
static const struct snd_soc_dapm_route dir_routes[] = {
{ "Capture", NULL, "spdif-in" },
};
#define STUB_RATES SNDRV_PCM_RATE_8000_192000
#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE | \
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
static struct snd_soc_component_driver soc_codec_spdif_dir = {
.dapm_widgets = dir_widgets,
.num_dapm_widgets = ARRAY_SIZE(dir_widgets),
.dapm_routes = dir_routes,
.num_dapm_routes = ARRAY_SIZE(dir_routes),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static struct snd_soc_dai_driver dir_stub_dai = {
.name = "dir-hifi",
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 384,
.rates = STUB_RATES,
.formats = STUB_FORMATS,
},
};
static int spdif_dir_probe(struct platform_device *pdev)
{
return devm_snd_soc_register_component(&pdev->dev,
&soc_codec_spdif_dir,
&dir_stub_dai, 1);
}
#ifdef CONFIG_OF
static const struct of_device_id spdif_dir_dt_ids[] = {
{ .compatible = "linux,spdif-dir", },
{ }
};
MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
#endif
static struct platform_driver spdif_dir_driver = {
.probe = spdif_dir_probe,
.driver = {
.name = "spdif-dir",
.of_match_table = of_match_ptr(spdif_dir_dt_ids),
},
};
module_platform_driver(spdif_dir_driver);
MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
MODULE_LICENSE("GPL");
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