[mirror_ubuntu-jammy-kernel.git] / sound / soc / codecs / spdif_receiver.c

// 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,
	.non_legacy_dai_naming	= 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");
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
cdf60525 VK	2	/*
	3	* ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
	4	*
	5	* Based on ALSA SoC SPDIF DIT driver
	6	*
	7	* This driver is used by controllers which can operate in DIR (SPDI/F) where
	8	* no codec is needed. This file provides stub codec that can be used
	9	* in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
	10	*
	11	* Author: Vipin Kumar, <vipin.kumar@st.com>
	12	* Copyright: (C) 2012 ST Microelectronics
cdf60525 VK	13	*/
	14
	15	#include <linux/module.h>
	16	#include <linux/moduleparam.h>
	17	#include <linux/slab.h>
	18	#include <sound/soc.h>
	19	#include <sound/pcm.h>
	20	#include <sound/initval.h>
f9c8ba89	21	#include <linux/of.h>
cdf60525	22
2f6e3ba0 MB	23	static const struct snd_soc_dapm_widget dir_widgets[] = {
	24	SND_SOC_DAPM_INPUT("spdif-in"),
	25	};
	26
	27	static const struct snd_soc_dapm_route dir_routes[] = {
	28	{ "Capture", NULL, "spdif-in" },
	29	};
	30
cdf60525 VK	31	#define STUB_RATES SNDRV_PCM_RATE_8000_192000
cdf60525 VK	32	#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| \
db5ff954	33	SNDRV_PCM_FMTBIT_S20_3LE \| \
eb733366 KS	34	SNDRV_PCM_FMTBIT_S24_LE \| \
eb733366 KS	35	SNDRV_PCM_FMTBIT_S32_LE \| \
cdf60525 VK	36	SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
cdf60525 VK	37
8c6086b8 KM	38	static struct snd_soc_component_driver soc_codec_spdif_dir = {
	39	.dapm_widgets = dir_widgets,
	40	.num_dapm_widgets = ARRAY_SIZE(dir_widgets),
	41	.dapm_routes = dir_routes,
	42	.num_dapm_routes = ARRAY_SIZE(dir_routes),
	43	.idle_bias_on = 1,
	44	.use_pmdown_time = 1,
	45	.endianness = 1,
	46	.non_legacy_dai_naming = 1,
2f6e3ba0	47	};
cdf60525 VK	48
	49	static struct snd_soc_dai_driver dir_stub_dai = {
	50	.name = "dir-hifi",
	51	.capture = {
	52	.stream_name = "Capture",
	53	.channels_min = 1,
	54	.channels_max = 384,
	55	.rates = STUB_RATES,
	56	.formats = STUB_FORMATS,
	57	},
	58	};
	59
	60	static int spdif_dir_probe(struct platform_device *pdev)
	61	{
8c6086b8 KM	62	return devm_snd_soc_register_component(&pdev->dev,
8c6086b8 KM	63	&soc_codec_spdif_dir,
cdf60525 VK	64	&dir_stub_dai, 1);
	65	}
	66
f9c8ba89 MB	67	#ifdef CONFIG_OF
	68	static const struct of_device_id spdif_dir_dt_ids[] = {
	69	{ .compatible = "linux,spdif-dir", },
	70	{ }
	71	};
	72	MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
	73	#endif
	74
cdf60525 VK	75	static struct platform_driver spdif_dir_driver = {
cdf60525 VK	76	.probe = spdif_dir_probe,
cdf60525 VK	77	.driver = {
cdf60525 VK	78	.name = "spdif-dir",
f9c8ba89	79	.of_match_table = of_match_ptr(spdif_dir_dt_ids),
cdf60525 VK	80	},
	81	};
	82
	83	module_platform_driver(spdif_dir_driver);
	84
	85	MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
	86	MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
	87	MODULE_LICENSE("GPL");