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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> | |
f9c8ba89 | 24 | #include <linux/of.h> |
cdf60525 | 25 | |
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26 | static const struct snd_soc_dapm_widget dir_widgets[] = { |
27 | SND_SOC_DAPM_INPUT("spdif-in"), | |
28 | }; | |
29 | ||
30 | static const struct snd_soc_dapm_route dir_routes[] = { | |
31 | { "Capture", NULL, "spdif-in" }, | |
32 | }; | |
33 | ||
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34 | #define STUB_RATES SNDRV_PCM_RATE_8000_192000 |
35 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ | |
db5ff954 NC |
36 | SNDRV_PCM_FMTBIT_S20_3LE | \ |
37 | SNDRV_PCM_FMTBIT_S24_LE | \ | |
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38 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) |
39 | ||
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40 | static struct snd_soc_codec_driver soc_codec_spdif_dir = { |
41 | .dapm_widgets = dir_widgets, | |
42 | .num_dapm_widgets = ARRAY_SIZE(dir_widgets), | |
43 | .dapm_routes = dir_routes, | |
44 | .num_dapm_routes = ARRAY_SIZE(dir_routes), | |
45 | }; | |
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46 | |
47 | static struct snd_soc_dai_driver dir_stub_dai = { | |
48 | .name = "dir-hifi", | |
49 | .capture = { | |
50 | .stream_name = "Capture", | |
51 | .channels_min = 1, | |
52 | .channels_max = 384, | |
53 | .rates = STUB_RATES, | |
54 | .formats = STUB_FORMATS, | |
55 | }, | |
56 | }; | |
57 | ||
58 | static int spdif_dir_probe(struct platform_device *pdev) | |
59 | { | |
60 | return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir, | |
61 | &dir_stub_dai, 1); | |
62 | } | |
63 | ||
64 | static int spdif_dir_remove(struct platform_device *pdev) | |
65 | { | |
66 | snd_soc_unregister_codec(&pdev->dev); | |
67 | return 0; | |
68 | } | |
69 | ||
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70 | #ifdef CONFIG_OF |
71 | static const struct of_device_id spdif_dir_dt_ids[] = { | |
72 | { .compatible = "linux,spdif-dir", }, | |
73 | { } | |
74 | }; | |
75 | MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids); | |
76 | #endif | |
77 | ||
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78 | static struct platform_driver spdif_dir_driver = { |
79 | .probe = spdif_dir_probe, | |
80 | .remove = spdif_dir_remove, | |
81 | .driver = { | |
82 | .name = "spdif-dir", | |
f9c8ba89 | 83 | .of_match_table = of_match_ptr(spdif_dir_dt_ids), |
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84 | }, |
85 | }; | |
86 | ||
87 | module_platform_driver(spdif_dir_driver); | |
88 | ||
89 | MODULE_DESCRIPTION("ASoC SPDIF DIR driver"); | |
90 | MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>"); | |
91 | MODULE_LICENSE("GPL"); |