88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ALSA SoC SPDIF DIT driver
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*
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* This driver is used by controllers which can operate in DIT (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. TI DaVinci Audio controller uses this driver.
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*
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* Author: Steve Chen, <schen@mvista.com>
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* Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
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* Copyright: (C) 2009 Texas Instruments, India
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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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#define DRV_NAME "spdif-dit"
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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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static const struct snd_soc_dapm_widget dit_widgets[] = {
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SND_SOC_DAPM_OUTPUT("spdif-out"),
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};
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static const struct snd_soc_dapm_route dit_routes[] = {
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{ "spdif-out", NULL, "Playback" },
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};
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static struct snd_soc_component_driver soc_codec_spdif_dit = {
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.dapm_widgets = dit_widgets,
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.num_dapm_widgets = ARRAY_SIZE(dit_widgets),
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.dapm_routes = dit_routes,
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.num_dapm_routes = ARRAY_SIZE(dit_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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};
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static struct snd_soc_dai_driver dit_stub_dai = {
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.name = "dit-hifi",
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.playback = {
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.stream_name = "Playback",
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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_dit_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_dit,
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&dit_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_dit_dt_ids[] = {
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{ .compatible = "linux,spdif-dit", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids);
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#endif
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static struct platform_driver spdif_dit_driver = {
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.probe = spdif_dit_probe,
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.driver = {
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.name = DRV_NAME,
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.of_match_table = of_match_ptr(spdif_dit_dt_ids),
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},
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};
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module_platform_driver(spdif_dit_driver);
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MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
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MODULE_DESCRIPTION("SPDIF dummy codec driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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