17aae816dSMark Brown /* 27aae816dSMark Brown * soc-util.c -- ALSA SoC Audio Layer utility functions 37aae816dSMark Brown * 47aae816dSMark Brown * Copyright 2009 Wolfson Microelectronics PLC. 57aae816dSMark Brown * 67aae816dSMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 77aae816dSMark Brown * Liam Girdwood <lrg@slimlogic.co.uk> 87aae816dSMark Brown * 97aae816dSMark Brown * 107aae816dSMark Brown * This program is free software; you can redistribute it and/or modify it 117aae816dSMark Brown * under the terms of the GNU General Public License as published by the 127aae816dSMark Brown * Free Software Foundation; either version 2 of the License, or (at your 137aae816dSMark Brown * option) any later version. 147aae816dSMark Brown */ 157aae816dSMark Brown 167aae816dSMark Brown #include <sound/core.h> 177aae816dSMark Brown #include <sound/pcm.h> 187aae816dSMark Brown #include <sound/pcm_params.h> 197aae816dSMark Brown #include <sound/soc.h> 207aae816dSMark Brown 217aae816dSMark Brown int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) 227aae816dSMark Brown { 237aae816dSMark Brown return sample_size * channels * tdm_slots; 247aae816dSMark Brown } 257aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); 267aae816dSMark Brown 277aae816dSMark Brown int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) 287aae816dSMark Brown { 297aae816dSMark Brown int sample_size; 307aae816dSMark Brown 317aae816dSMark Brown switch (params_format(params)) { 327aae816dSMark Brown case SNDRV_PCM_FORMAT_S16_LE: 337aae816dSMark Brown case SNDRV_PCM_FORMAT_S16_BE: 347aae816dSMark Brown sample_size = 16; 357aae816dSMark Brown break; 367aae816dSMark Brown case SNDRV_PCM_FORMAT_S20_3LE: 377aae816dSMark Brown case SNDRV_PCM_FORMAT_S20_3BE: 387aae816dSMark Brown sample_size = 20; 397aae816dSMark Brown break; 407aae816dSMark Brown case SNDRV_PCM_FORMAT_S24_LE: 417aae816dSMark Brown case SNDRV_PCM_FORMAT_S24_BE: 427aae816dSMark Brown sample_size = 24; 437aae816dSMark Brown break; 447aae816dSMark Brown case SNDRV_PCM_FORMAT_S32_LE: 457aae816dSMark Brown case SNDRV_PCM_FORMAT_S32_BE: 467aae816dSMark Brown sample_size = 32; 477aae816dSMark Brown break; 487aae816dSMark Brown default: 497aae816dSMark Brown return -ENOTSUPP; 507aae816dSMark Brown } 517aae816dSMark Brown 527aae816dSMark Brown return snd_soc_calc_frame_size(sample_size, params_channels(params), 537aae816dSMark Brown 1); 547aae816dSMark Brown } 557aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); 567aae816dSMark Brown 57*c0fa59dfSMark Brown int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) 58*c0fa59dfSMark Brown { 59*c0fa59dfSMark Brown return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); 60*c0fa59dfSMark Brown } 61*c0fa59dfSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); 62*c0fa59dfSMark Brown 637aae816dSMark Brown int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) 647aae816dSMark Brown { 657aae816dSMark Brown int ret; 667aae816dSMark Brown 677aae816dSMark Brown ret = snd_soc_params_to_frame_size(params); 687aae816dSMark Brown 697aae816dSMark Brown if (ret > 0) 707aae816dSMark Brown return ret * params_rate(params); 717aae816dSMark Brown else 727aae816dSMark Brown return ret; 737aae816dSMark Brown } 747aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); 75