blob: 1d07b931f3d8993d6d6844e4d2cd2a520e2cbced [file] [log] [blame]
Mark Brown7aae8162009-11-10 16:08:04 +00001/*
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
16#include <sound/core.h>
17#include <sound/pcm.h>
18#include <sound/pcm_params.h>
19#include <sound/soc.h>
20
21int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots)
22{
23 return sample_size * channels * tdm_slots;
24}
25EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size);
26
27int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params)
28{
29 int sample_size;
30
31 switch (params_format(params)) {
32 case SNDRV_PCM_FORMAT_S16_LE:
33 case SNDRV_PCM_FORMAT_S16_BE:
34 sample_size = 16;
35 break;
36 case SNDRV_PCM_FORMAT_S20_3LE:
37 case SNDRV_PCM_FORMAT_S20_3BE:
38 sample_size = 20;
39 break;
40 case SNDRV_PCM_FORMAT_S24_LE:
41 case SNDRV_PCM_FORMAT_S24_BE:
42 sample_size = 24;
43 break;
44 case SNDRV_PCM_FORMAT_S32_LE:
45 case SNDRV_PCM_FORMAT_S32_BE:
46 sample_size = 32;
47 break;
48 default:
49 return -ENOTSUPP;
50 }
51
52 return snd_soc_calc_frame_size(sample_size, params_channels(params),
53 1);
54}
55EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size);
56
Mark Brownc0fa59d2009-11-19 11:36:10 +000057int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots)
58{
59 return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots);
60}
61EXPORT_SYMBOL_GPL(snd_soc_calc_bclk);
62
Mark Brown7aae8162009-11-10 16:08:04 +000063int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
64{
65 int ret;
66
67 ret = snd_soc_params_to_frame_size(params);
68
69 if (ret > 0)
70 return ret * params_rate(params);
71 else
72 return ret;
73}
74EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);