projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
| Commit | Line | Data |
|---|---|---|
| 7aae816d MB |
1 | /* |
| 2 | * soc-util.c -- ALSA SoC Audio Layer utility functions | |
| 3 | * | |
| 4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
| 5 | * | |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
| 7 | * Liam Girdwood <lrg@slimlogic.co.uk> | |
| 8 | * | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or modify it | |
| 11 | * under the terms of the GNU General Public License as published by the | |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your | |
| 13 | * option) any later version. | |
| 14 | */ | |
| 15 | ||
| 848dd8be | 16 | #include <linux/platform_device.h> |
| d81a6d71 | 17 | #include <linux/export.h> |
| 7aae816d MB |
18 | #include <sound/core.h> |
| 19 | #include <sound/pcm.h> | |
| 20 | #include <sound/pcm_params.h> | |
| 21 | #include <sound/soc.h> | |
| 22 | ||
| 23 | int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) | |
| 24 | { | |
| 25 | return sample_size * channels * tdm_slots; | |
| 26 | } | |
| 27 | EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); | |
| 28 | ||
| 29 | int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) | |
| 30 | { | |
| 31 | int sample_size; | |
| 32 | ||
| 3d8b2ce0 MB |
33 | sample_size = snd_pcm_format_width(params_format(params)); |
| 34 | if (sample_size < 0) | |
| 35 | return sample_size; | |
| 7aae816d MB |
36 | |
| 37 | return snd_soc_calc_frame_size(sample_size, params_channels(params), | |
| 38 | 1); | |
| 39 | } | |
| 40 | EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); | |
| 41 | ||
| c0fa59df MB |
42 | int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) |
| 43 | { | |
| 44 | return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); | |
| 45 | } | |
| 46 | EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); | |
| 47 | ||
| 7aae816d MB |
48 | int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) |
| 49 | { | |
| 50 | int ret; | |
| 51 | ||
| 52 | ret = snd_soc_params_to_frame_size(params); | |
| 53 | ||
| 54 | if (ret > 0) | |
| 55 | return ret * params_rate(params); | |
| 56 | else | |
| 57 | return ret; | |
| 58 | } | |
| 59 | EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); | |
| 848dd8be MB |
60 | |
| 61 | static struct snd_soc_platform_driver dummy_platform; | |
| 62 | ||
| 63 | static __devinit int snd_soc_dummy_probe(struct platform_device *pdev) | |
| 64 | { | |
| 65 | return snd_soc_register_platform(&pdev->dev, &dummy_platform); | |
| 66 | } | |
| 67 | ||
| 68 | static __devexit int snd_soc_dummy_remove(struct platform_device *pdev) | |
| 69 | { | |
| 70 | snd_soc_unregister_platform(&pdev->dev); | |
| 71 | ||
| 72 | return 0; | |
| 73 | } | |
| 74 | ||
| 75 | static struct platform_driver soc_dummy_driver = { | |
| 76 | .driver = { | |
| 77 | .name = "snd-soc-dummy", | |
| 78 | .owner = THIS_MODULE, | |
| 79 | }, | |
| 80 | .probe = snd_soc_dummy_probe, | |
| 81 | .remove = __devexit_p(snd_soc_dummy_remove), | |
| 82 | }; | |
| 83 | ||
| 84 | static struct platform_device *soc_dummy_dev; | |
| 85 | ||
| fb257897 | 86 | int __init snd_soc_util_init(void) |
| 848dd8be MB |
87 | { |
| 88 | int ret; | |
| 89 | ||
| 90 | soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1); | |
| 91 | if (!soc_dummy_dev) | |
| 92 | return -ENOMEM; | |
| 93 | ||
| 94 | ret = platform_device_add(soc_dummy_dev); | |
| 95 | if (ret != 0) { | |
| 96 | platform_device_put(soc_dummy_dev); | |
| 97 | return ret; | |
| 98 | } | |
| 99 | ||
| 100 | ret = platform_driver_register(&soc_dummy_driver); | |
| 101 | if (ret != 0) | |
| 102 | platform_device_unregister(soc_dummy_dev); | |
| 103 | ||
| 104 | return ret; | |
| 105 | } | |
| 848dd8be | 106 | |
| fb257897 | 107 | void __exit snd_soc_util_exit(void) |
| 848dd8be MB |
108 | { |
| 109 | platform_device_unregister(soc_dummy_dev); | |
| 110 | platform_driver_unregister(&soc_dummy_driver); | |
| 111 | } |