projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| be461ba8 C |
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 | |
| be461ba8 C |
12 | */ |
| 13 | ||
| 14 | #include <linux/module.h> | |
| 15 | #include <linux/moduleparam.h> | |
| 37a5ddf4 | 16 | #include <linux/slab.h> |
| be461ba8 C |
17 | #include <sound/soc.h> |
| 18 | #include <sound/pcm.h> | |
| 3a642915 | 19 | #include <sound/initval.h> |
| 1b7c8b35 | 20 | #include <linux/of.h> |
| be461ba8 | 21 | |
| 6ae759e8 | 22 | #define DRV_NAME "spdif-dit" |
| 0a0cf58d | 23 | |
| 8055c0cd JB |
24 | #define STUB_RATES (SNDRV_PCM_RATE_8000_768000 | \ |
| 25 | SNDRV_PCM_RATE_128000) | |
| db5ff954 NC |
26 | #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \ |
| 27 | SNDRV_PCM_FMTBIT_S20_3LE | \ | |
| eb733366 KS |
28 | SNDRV_PCM_FMTBIT_S24_LE | \ |
| 29 | SNDRV_PCM_FMTBIT_S32_LE) | |
| 3a642915 | 30 | |
| 6ad70948 RK |
31 | static const struct snd_soc_dapm_widget dit_widgets[] = { |
| 32 | SND_SOC_DAPM_OUTPUT("spdif-out"), | |
| 33 | }; | |
| 34 | ||
| fc606148 | 35 | static const struct snd_soc_dapm_route dit_routes[] = { |
| 6ad70948 RK |
36 | { "spdif-out", NULL, "Playback" }, |
| 37 | }; | |
| 38 | ||
| 3860978c KM |
39 | static 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, | |
| 6ad70948 | 47 | }; |
| 3a642915 | 48 | |
| f0fba2ad LG |
49 | static struct snd_soc_dai_driver dit_stub_dai = { |
| 50 | .name = "dit-hifi", | |
| be461ba8 C |
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 | ||
| 60 | static int spdif_dit_probe(struct platform_device *pdev) | |
| 61 | { | |
| 3860978c KM |
62 | return devm_snd_soc_register_component(&pdev->dev, |
| 63 | &soc_codec_spdif_dit, | |
| f0fba2ad | 64 | &dit_stub_dai, 1); |
| be461ba8 C |
65 | } |
| 66 | ||
| 1b7c8b35 MB |
67 | #ifdef CONFIG_OF |
| 68 | static const struct of_device_id spdif_dit_dt_ids[] = { | |
| 69 | { .compatible = "linux,spdif-dit", }, | |
| 70 | { } | |
| 71 | }; | |
| 72 | MODULE_DEVICE_TABLE(of, spdif_dit_dt_ids); | |
| 73 | #endif | |
| 74 | ||
| be461ba8 C |
75 | static struct platform_driver spdif_dit_driver = { |
| 76 | .probe = spdif_dit_probe, | |
| be461ba8 | 77 | .driver = { |
| 6ae759e8 | 78 | .name = DRV_NAME, |
| 1b7c8b35 | 79 | .of_match_table = of_match_ptr(spdif_dit_dt_ids), |
| be461ba8 C |
80 | }, |
| 81 | }; | |
| 82 | ||
| 5bbcc3c0 | 83 | module_platform_driver(spdif_dit_driver); |
| be461ba8 | 84 | |
| 6ae759e8 SW |
85 | MODULE_AUTHOR("Steve Chen <schen@mvista.com>"); |
| 86 | MODULE_DESCRIPTION("SPDIF dummy codec driver"); | |
| 87 | MODULE_LICENSE("GPL"); | |
| 88 | MODULE_ALIAS("platform:" DRV_NAME); |