1// SPDX-License-Identifier: GPL-2.0-only
 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
 
 
 
 
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>
21#include <linux/of.h>
22
23static const struct snd_soc_dapm_widget dir_widgets[] = {
24	SND_SOC_DAPM_INPUT("spdif-in"),
25};
26
27static const struct snd_soc_dapm_route dir_routes[] = {
28	{ "Capture", NULL, "spdif-in" },
29};
30
31#define STUB_RATES	SNDRV_PCM_RATE_8000_192000
32#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
33			SNDRV_PCM_FMTBIT_S20_3LE | \
34			SNDRV_PCM_FMTBIT_S24_LE  | \
35			SNDRV_PCM_FMTBIT_S32_LE | \
36			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
37
38static 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};
47
48static struct snd_soc_dai_driver dir_stub_dai = {
49	.name		= "dir-hifi",
50	.capture	= {
51		.stream_name	= "Capture",
52		.channels_min	= 1,
53		.channels_max	= 384,
54		.rates		= STUB_RATES,
55		.formats	= STUB_FORMATS,
56	},
57};
58
59static int spdif_dir_probe(struct platform_device *pdev)
60{
61	return devm_snd_soc_register_component(&pdev->dev,
62			&soc_codec_spdif_dir,
63			&dir_stub_dai, 1);
64}
65
66#ifdef CONFIG_OF
67static const struct of_device_id spdif_dir_dt_ids[] = {
68	{ .compatible = "linux,spdif-dir", },
69	{ }
70};
71MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
72#endif
73
74static struct platform_driver spdif_dir_driver = {
75	.probe		= spdif_dir_probe,
76	.driver		= {
77		.name	= "spdif-dir",
78		.of_match_table = of_match_ptr(spdif_dir_dt_ids),
79	},
80};
81
82module_platform_driver(spdif_dir_driver);
83
84MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
85MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
86MODULE_LICENSE("GPL");

 
 1/*
 2 * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
 3 *
 4 * Based on ALSA SoC SPDIF DIT driver
 5 *
 6 *  This driver is used by controllers which can operate in DIR (SPDI/F) where
 7 *  no codec is needed.  This file provides stub codec that can be used
 8 *  in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
 9 *
10 * Author:      Vipin Kumar,  <vipin.kumar@st.com>
11 * Copyright:   (C) 2012  ST Microelectronics
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18#include <linux/module.h>
19#include <linux/moduleparam.h>
20#include <linux/slab.h>
21#include <sound/soc.h>
22#include <sound/pcm.h>
23#include <sound/initval.h>
24#include <linux/of.h>
25
26static const struct snd_soc_dapm_widget dir_widgets[] = {
27	SND_SOC_DAPM_INPUT("spdif-in"),
28};
29
30static const struct snd_soc_dapm_route dir_routes[] = {
31	{ "Capture", NULL, "spdif-in" },
32};
33
34#define STUB_RATES	SNDRV_PCM_RATE_8000_192000
35#define STUB_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
36			SNDRV_PCM_FMTBIT_S20_3LE | \
37			SNDRV_PCM_FMTBIT_S24_LE  | \
38			SNDRV_PCM_FMTBIT_S32_LE | \
39			SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
40
41static struct snd_soc_component_driver soc_codec_spdif_dir = {
42	.dapm_widgets		= dir_widgets,
43	.num_dapm_widgets	= ARRAY_SIZE(dir_widgets),
44	.dapm_routes		= dir_routes,
45	.num_dapm_routes	= ARRAY_SIZE(dir_routes),
46	.idle_bias_on		= 1,
47	.use_pmdown_time	= 1,
48	.endianness		= 1,
49	.non_legacy_dai_naming	= 1,
50};
51
52static struct snd_soc_dai_driver dir_stub_dai = {
53	.name		= "dir-hifi",
54	.capture	= {
55		.stream_name	= "Capture",
56		.channels_min	= 1,
57		.channels_max	= 384,
58		.rates		= STUB_RATES,
59		.formats	= STUB_FORMATS,
60	},
61};
62
63static int spdif_dir_probe(struct platform_device *pdev)
64{
65	return devm_snd_soc_register_component(&pdev->dev,
66			&soc_codec_spdif_dir,
67			&dir_stub_dai, 1);
68}
69
70#ifdef CONFIG_OF
71static const struct of_device_id spdif_dir_dt_ids[] = {
72	{ .compatible = "linux,spdif-dir", },
73	{ }
74};
75MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
76#endif
77
78static struct platform_driver spdif_dir_driver = {
79	.probe		= spdif_dir_probe,
80	.driver		= {
81		.name	= "spdif-dir",
82		.of_match_table = of_match_ptr(spdif_dir_dt_ids),
83	},
84};
85
86module_platform_driver(spdif_dir_driver);
87
88MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
89MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
90MODULE_LICENSE("GPL");