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