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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * ALSA SoC SPDIF DIT driver
4 *
5 * This driver is used by controllers which can operate in DIT (SPDI/F) where
6 * no codec is needed. This file provides stub codec that can be used
7 * in these configurations. TI DaVinci Audio controller uses this driver.
8 *
9 * Author: Steve Chen, <schen@mvista.com>
10 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
11 * Copyright: (C) 2009 Texas Instruments, India
12 */
13
14#include <linux/module.h>
15#include <linux/moduleparam.h>
16#include <linux/slab.h>
17#include <sound/soc.h>
18#include <sound/pcm.h>
19#include <sound/initval.h>
20#include <linux/of.h>
21
22#define DRV_NAME "spdif-dit"
23
24#define STUB_RATES (SNDRV_PCM_RATE_8000_768000 | \
25 SNDRV_PCM_RATE_128000)
26#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
27 SNDRV_PCM_FMTBIT_S20_3LE | \
28 SNDRV_PCM_FMTBIT_S24_LE | \
29 SNDRV_PCM_FMTBIT_S32_LE)
30
31static const struct snd_soc_dapm_widget dit_widgets[] = {
32 SND_SOC_DAPM_OUTPUT("spdif-out"),
33};
34
35static const struct snd_soc_dapm_route dit_routes[] = {
36 { "spdif-out", NULL, "Playback" },
37};
38
39static const struct snd_soc_component_driver soc_codec_spdif_dit = {
40 .dapm_widgets = dit_widgets,
41 .num_dapm_widgets = ARRAY_SIZE(dit_widgets),
42 .dapm_routes = dit_routes,
43 .num_dapm_routes = ARRAY_SIZE(dit_routes),
44 .idle_bias_on = 1,
45 .use_pmdown_time = 1,
46 .endianness = 1,
47};
48
49static struct snd_soc_dai_driver dit_stub_dai = {
50 .name = "dit-hifi",
51 .playback = {
52 .stream_name = "Playback",
53 .channels_min = 1,
54 .channels_max = 384,
55 .rates = STUB_RATES,
56 .formats = STUB_FORMATS,
57 },
58};
59
60static int spdif_dit_probe(struct platform_device *pdev)
61{
62 return devm_snd_soc_register_component(&pdev->dev,
63 &soc_codec_spdif_dit,
64 &dit_stub_dai, 1);
65}
66
67#ifdef CONFIG_OF
68static const struct of_device_id spdif_dit_dt_ids[] = {
69 { .compatible = "linux,spdif-dit", },
70 { }
71};
72MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids);
73#endif
74
75static struct platform_driver spdif_dit_driver = {
76 .probe = spdif_dit_probe,
77 .driver = {
78 .name = DRV_NAME,
79 .of_match_table = of_match_ptr(spdif_dit_dt_ids),
80 },
81};
82
83module_platform_driver(spdif_dit_driver);
84
85MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
86MODULE_DESCRIPTION("SPDIF dummy codec driver");
87MODULE_LICENSE("GPL");
88MODULE_ALIAS("platform:" DRV_NAME);
1/*
2 * ALSA SoC SPDIF DIT driver
3 *
4 * This driver is used by controllers which can operate in DIT (SPDI/F) where
5 * no codec is needed. This file provides stub codec that can be used
6 * in these configurations. TI DaVinci Audio controller uses this driver.
7 *
8 * Author: Steve Chen, <schen@mvista.com>
9 * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com>
10 * Copyright: (C) 2009 Texas Instruments, India
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
15 */
16
17#include <linux/module.h>
18#include <linux/moduleparam.h>
19#include <linux/slab.h>
20#include <sound/soc.h>
21#include <sound/pcm.h>
22#include <sound/initval.h>
23#include <linux/of.h>
24
25#define DRV_NAME "spdif-dit"
26
27#define STUB_RATES SNDRV_PCM_RATE_8000_192000
28#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
29 SNDRV_PCM_FMTBIT_S20_3LE | \
30 SNDRV_PCM_FMTBIT_S24_LE | \
31 SNDRV_PCM_FMTBIT_S32_LE)
32
33static const struct snd_soc_dapm_widget dit_widgets[] = {
34 SND_SOC_DAPM_OUTPUT("spdif-out"),
35};
36
37static const struct snd_soc_dapm_route dit_routes[] = {
38 { "spdif-out", NULL, "Playback" },
39};
40
41static struct snd_soc_component_driver soc_codec_spdif_dit = {
42 .dapm_widgets = dit_widgets,
43 .num_dapm_widgets = ARRAY_SIZE(dit_widgets),
44 .dapm_routes = dit_routes,
45 .num_dapm_routes = ARRAY_SIZE(dit_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 dit_stub_dai = {
53 .name = "dit-hifi",
54 .playback = {
55 .stream_name = "Playback",
56 .channels_min = 1,
57 .channels_max = 384,
58 .rates = STUB_RATES,
59 .formats = STUB_FORMATS,
60 },
61};
62
63static int spdif_dit_probe(struct platform_device *pdev)
64{
65 return devm_snd_soc_register_component(&pdev->dev,
66 &soc_codec_spdif_dit,
67 &dit_stub_dai, 1);
68}
69
70#ifdef CONFIG_OF
71static const struct of_device_id spdif_dit_dt_ids[] = {
72 { .compatible = "linux,spdif-dit", },
73 { }
74};
75MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids);
76#endif
77
78static struct platform_driver spdif_dit_driver = {
79 .probe = spdif_dit_probe,
80 .driver = {
81 .name = DRV_NAME,
82 .of_match_table = of_match_ptr(spdif_dit_dt_ids),
83 },
84};
85
86module_platform_driver(spdif_dit_driver);
87
88MODULE_AUTHOR("Steve Chen <schen@mvista.com>");
89MODULE_DESCRIPTION("SPDIF dummy codec driver");
90MODULE_LICENSE("GPL");
91MODULE_ALIAS("platform:" DRV_NAME);