1*7aae816dSMark Brown /* 2*7aae816dSMark Brown * soc-util.c -- ALSA SoC Audio Layer utility functions 3*7aae816dSMark Brown * 4*7aae816dSMark Brown * Copyright 2009 Wolfson Microelectronics PLC. 5*7aae816dSMark Brown * 6*7aae816dSMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 7*7aae816dSMark Brown * Liam Girdwood <lrg@slimlogic.co.uk> 8*7aae816dSMark Brown * 9*7aae816dSMark Brown * 10*7aae816dSMark Brown * This program is free software; you can redistribute it and/or modify it 11*7aae816dSMark Brown * under the terms of the GNU General Public License as published by the 12*7aae816dSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 13*7aae816dSMark Brown * option) any later version. 14*7aae816dSMark Brown */ 15*7aae816dSMark Brown 16*7aae816dSMark Brown #include <sound/core.h> 17*7aae816dSMark Brown #include <sound/pcm.h> 18*7aae816dSMark Brown #include <sound/pcm_params.h> 19*7aae816dSMark Brown #include <sound/soc.h> 20*7aae816dSMark Brown 21*7aae816dSMark Brown int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) 22*7aae816dSMark Brown { 23*7aae816dSMark Brown return sample_size * channels * tdm_slots; 24*7aae816dSMark Brown } 25*7aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); 26*7aae816dSMark Brown 27*7aae816dSMark Brown int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) 28*7aae816dSMark Brown { 29*7aae816dSMark Brown int sample_size; 30*7aae816dSMark Brown 31*7aae816dSMark Brown switch (params_format(params)) { 32*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S16_LE: 33*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S16_BE: 34*7aae816dSMark Brown sample_size = 16; 35*7aae816dSMark Brown break; 36*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S20_3LE: 37*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S20_3BE: 38*7aae816dSMark Brown sample_size = 20; 39*7aae816dSMark Brown break; 40*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S24_LE: 41*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S24_BE: 42*7aae816dSMark Brown sample_size = 24; 43*7aae816dSMark Brown break; 44*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S32_LE: 45*7aae816dSMark Brown case SNDRV_PCM_FORMAT_S32_BE: 46*7aae816dSMark Brown sample_size = 32; 47*7aae816dSMark Brown break; 48*7aae816dSMark Brown default: 49*7aae816dSMark Brown return -ENOTSUPP; 50*7aae816dSMark Brown } 51*7aae816dSMark Brown 52*7aae816dSMark Brown return snd_soc_calc_frame_size(sample_size, params_channels(params), 53*7aae816dSMark Brown 1); 54*7aae816dSMark Brown } 55*7aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); 56*7aae816dSMark Brown 57*7aae816dSMark Brown int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) 58*7aae816dSMark Brown { 59*7aae816dSMark Brown int ret; 60*7aae816dSMark Brown 61*7aae816dSMark Brown ret = snd_soc_params_to_frame_size(params); 62*7aae816dSMark Brown 63*7aae816dSMark Brown if (ret > 0) 64*7aae816dSMark Brown return ret * params_rate(params); 65*7aae816dSMark Brown else 66*7aae816dSMark Brown return ret; 67*7aae816dSMark Brown } 68*7aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); 69