Commit | Line | Data |
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be461ba8 C |
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> | |
37a5ddf4 | 19 | #include <linux/slab.h> |
be461ba8 C |
20 | #include <sound/soc.h> |
21 | #include <sound/pcm.h> | |
3a642915 | 22 | #include <sound/initval.h> |
1b7c8b35 | 23 | #include <linux/of.h> |
be461ba8 | 24 | |
6ae759e8 | 25 | #define DRV_NAME "spdif-dit" |
0a0cf58d | 26 | |
be461ba8 | 27 | #define STUB_RATES SNDRV_PCM_RATE_8000_96000 |
db5ff954 NC |
28 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ |
29 | SNDRV_PCM_FMTBIT_S20_3LE | \ | |
30 | SNDRV_PCM_FMTBIT_S24_LE) | |
3a642915 | 31 | |
6ad70948 RK |
32 | static const struct snd_soc_dapm_widget dit_widgets[] = { |
33 | SND_SOC_DAPM_OUTPUT("spdif-out"), | |
34 | }; | |
35 | ||
fc606148 | 36 | static const struct snd_soc_dapm_route dit_routes[] = { |
6ad70948 RK |
37 | { "spdif-out", NULL, "Playback" }, |
38 | }; | |
39 | ||
40 | static struct snd_soc_codec_driver soc_codec_spdif_dit = { | |
41 | .dapm_widgets = dit_widgets, | |
42 | .num_dapm_widgets = ARRAY_SIZE(dit_widgets), | |
43 | .dapm_routes = dit_routes, | |
44 | .num_dapm_routes = ARRAY_SIZE(dit_routes), | |
45 | }; | |
3a642915 | 46 | |
f0fba2ad LG |
47 | static struct snd_soc_dai_driver dit_stub_dai = { |
48 | .name = "dit-hifi", | |
be461ba8 C |
49 | .playback = { |
50 | .stream_name = "Playback", | |
51 | .channels_min = 1, | |
52 | .channels_max = 384, | |
53 | .rates = STUB_RATES, | |
54 | .formats = STUB_FORMATS, | |
55 | }, | |
56 | }; | |
57 | ||
58 | static int spdif_dit_probe(struct platform_device *pdev) | |
59 | { | |
f0fba2ad LG |
60 | return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dit, |
61 | &dit_stub_dai, 1); | |
be461ba8 C |
62 | } |
63 | ||
64 | static int spdif_dit_remove(struct platform_device *pdev) | |
65 | { | |
f0fba2ad | 66 | snd_soc_unregister_codec(&pdev->dev); |
be461ba8 C |
67 | return 0; |
68 | } | |
69 | ||
1b7c8b35 MB |
70 | #ifdef CONFIG_OF |
71 | static const struct of_device_id spdif_dit_dt_ids[] = { | |
72 | { .compatible = "linux,spdif-dit", }, | |
73 | { } | |
74 | }; | |
75 | MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids); | |
76 | #endif | |
77 | ||
be461ba8 C |
78 | static struct platform_driver spdif_dit_driver = { |
79 | .probe = spdif_dit_probe, | |
80 | .remove = spdif_dit_remove, | |
81 | .driver = { | |
6ae759e8 | 82 | .name = DRV_NAME, |
be461ba8 | 83 | .owner = THIS_MODULE, |
1b7c8b35 | 84 | .of_match_table = of_match_ptr(spdif_dit_dt_ids), |
be461ba8 C |
85 | }, |
86 | }; | |
87 | ||
5bbcc3c0 | 88 | module_platform_driver(spdif_dit_driver); |
be461ba8 | 89 | |
6ae759e8 SW |
90 | MODULE_AUTHOR("Steve Chen <schen@mvista.com>"); |
91 | MODULE_DESCRIPTION("SPDIF dummy codec driver"); | |
92 | MODULE_LICENSE("GPL"); | |
93 | MODULE_ALIAS("platform:" DRV_NAME); |