projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| cdf60525 VK |
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 | |
| 2f6e3ba0 MB |
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 | ||
| cdf60525 VK |
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 | \ | |
| cdf60525 VK |
38 | SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) |
| 39 | ||
| 2f6e3ba0 | 40 | static struct snd_soc_codec_driver soc_codec_spdif_dir = { |
| 35eeafe3 KM |
41 | .component_driver = { |
| 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 | }, | |
| 2f6e3ba0 | 47 | }; |
| cdf60525 VK |
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 | { | |
| 62 | return snd_soc_register_codec(&pdev->dev, &soc_codec_spdif_dir, | |
| 63 | &dir_stub_dai, 1); | |
| 64 | } | |
| 65 | ||
| 66 | static int spdif_dir_remove(struct platform_device *pdev) | |
| 67 | { | |
| 68 | snd_soc_unregister_codec(&pdev->dev); | |
| 69 | return 0; | |
| 70 | } | |
| 71 | ||
| f9c8ba89 MB |
72 | #ifdef CONFIG_OF |
| 73 | static const struct of_device_id spdif_dir_dt_ids[] = { | |
| 74 | { .compatible = "linux,spdif-dir", }, | |
| 75 | { } | |
| 76 | }; | |
| 77 | MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids); | |
| 78 | #endif | |
| 79 | ||
| cdf60525 VK |
80 | static struct platform_driver spdif_dir_driver = { |
| 81 | .probe = spdif_dir_probe, | |
| 82 | .remove = spdif_dir_remove, | |
| 83 | .driver = { | |
| 84 | .name = "spdif-dir", | |
| f9c8ba89 | 85 | .of_match_table = of_match_ptr(spdif_dir_dt_ids), |
| cdf60525 VK |
86 | }, |
| 87 | }; | |
| 88 | ||
| 89 | module_platform_driver(spdif_dir_driver); | |
| 90 | ||
| 91 | MODULE_DESCRIPTION("ASoC SPDIF DIR driver"); | |
| 92 | MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>"); | |
| 93 | MODULE_LICENSE("GPL"); |