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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 | ||
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31 | #define STUB_RATES SNDRV_PCM_RATE_8000_192000 |
32 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ | |
db5ff954 | 33 | SNDRV_PCM_FMTBIT_S20_3LE | \ |
eb733366 KS |
34 | SNDRV_PCM_FMTBIT_S24_LE | \ |
35 | SNDRV_PCM_FMTBIT_S32_LE | \ | |
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36 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) |
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 | }; |
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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, |
63 | &soc_codec_spdif_dir, | |
cdf60525 VK |
64 | &dir_stub_dai, 1); |
65 | } | |
66 | ||
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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 | ||
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75 | static struct platform_driver spdif_dir_driver = { |
76 | .probe = spdif_dir_probe, | |
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77 | .driver = { |
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"); |