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 | 60 | |
| cefcc03f MB |
61 | static const struct snd_pcm_hardware dummy_dma_hardware = { |
| 62 | .formats = 0xffffffff, | |
| 63 | .channels_min = 1, | |
| 64 | .channels_max = UINT_MAX, | |
| 65 | ||
| 66 | /* Random values to keep userspace happy when checking constraints */ | |
| 67 | .info = SNDRV_PCM_INFO_INTERLEAVED | | |
| 68 | SNDRV_PCM_INFO_BLOCK_TRANSFER, | |
| 69 | .buffer_bytes_max = 128*1024, | |
| 70 | .period_bytes_min = PAGE_SIZE, | |
| 71 | .period_bytes_max = PAGE_SIZE*2, | |
| 72 | .periods_min = 2, | |
| 73 | .periods_max = 128, | |
| 74 | }; | |
| 75 | ||
| 76 | static int dummy_dma_open(struct snd_pcm_substream *substream) | |
| 77 | { | |
| 78 | snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware); | |
| 79 | ||
| 80 | return 0; | |
| 81 | } | |
| 82 | ||
| 83 | static struct snd_pcm_ops dummy_dma_ops = { | |
| 84 | .open = dummy_dma_open, | |
| 85 | .ioctl = snd_pcm_lib_ioctl, | |
| 86 | }; | |
| 87 | ||
| 88 | static struct snd_soc_platform_driver dummy_platform = { | |
| 89 | .ops = &dummy_dma_ops, | |
| 90 | }; | |
| 848dd8be | 91 | |
| 7aca69f9 LG |
92 | static struct snd_soc_codec_driver dummy_codec; |
| 93 | static struct snd_soc_dai_driver dummy_dai = { | |
| 94 | .name = "snd-soc-dummy-dai", | |
| 95 | }; | |
| 96 | ||
| 848dd8be MB |
97 | static __devinit int snd_soc_dummy_probe(struct platform_device *pdev) |
| 98 | { | |
| 7aca69f9 LG |
99 | int ret; |
| 100 | ||
| 101 | ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1); | |
| 102 | if (ret < 0) | |
| 103 | return ret; | |
| 104 | ||
| 105 | ret = snd_soc_register_platform(&pdev->dev, &dummy_platform); | |
| 106 | if (ret < 0) { | |
| 107 | snd_soc_unregister_codec(&pdev->dev); | |
| 108 | return ret; | |
| 109 | } | |
| 110 | ||
| 111 | return ret; | |
| 848dd8be MB |
112 | } |
| 113 | ||
| 114 | static __devexit int snd_soc_dummy_remove(struct platform_device *pdev) | |
| 115 | { | |
| 116 | snd_soc_unregister_platform(&pdev->dev); | |
| 7aca69f9 | 117 | snd_soc_unregister_codec(&pdev->dev); |
| 848dd8be MB |
118 | |
| 119 | return 0; | |
| 120 | } | |
| 121 | ||
| 122 | static struct platform_driver soc_dummy_driver = { | |
| 123 | .driver = { | |
| 124 | .name = "snd-soc-dummy", | |
| 125 | .owner = THIS_MODULE, | |
| 126 | }, | |
| 127 | .probe = snd_soc_dummy_probe, | |
| 128 | .remove = __devexit_p(snd_soc_dummy_remove), | |
| 129 | }; | |
| 130 | ||
| 131 | static struct platform_device *soc_dummy_dev; | |
| 132 | ||
| fb257897 | 133 | int __init snd_soc_util_init(void) |
| 848dd8be MB |
134 | { |
| 135 | int ret; | |
| 136 | ||
| 137 | soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1); | |
| 138 | if (!soc_dummy_dev) | |
| 139 | return -ENOMEM; | |
| 140 | ||
| 141 | ret = platform_device_add(soc_dummy_dev); | |
| 142 | if (ret != 0) { | |
| 143 | platform_device_put(soc_dummy_dev); | |
| 144 | return ret; | |
| 145 | } | |
| 146 | ||
| 147 | ret = platform_driver_register(&soc_dummy_driver); | |
| 148 | if (ret != 0) | |
| 149 | platform_device_unregister(soc_dummy_dev); | |
| 150 | ||
| 151 | return ret; | |
| 152 | } | |
| 848dd8be | 153 | |
| fb257897 | 154 | void __exit snd_soc_util_exit(void) |
| 848dd8be MB |
155 | { |
| 156 | platform_device_unregister(soc_dummy_dev); | |
| 157 | platform_driver_unregister(&soc_dummy_driver); | |
| 158 | } |