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 16848dd8beSMark Brown #include <linux/platform_device.h> 17d81a6d71SPaul Gortmaker #include <linux/export.h> 187aae816dSMark Brown #include <sound/core.h> 197aae816dSMark Brown #include <sound/pcm.h> 207aae816dSMark Brown #include <sound/pcm_params.h> 217aae816dSMark Brown #include <sound/soc.h> 227aae816dSMark Brown 237aae816dSMark Brown int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) 247aae816dSMark Brown { 257aae816dSMark Brown return sample_size * channels * tdm_slots; 267aae816dSMark Brown } 277aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); 287aae816dSMark Brown 297aae816dSMark Brown int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) 307aae816dSMark Brown { 317aae816dSMark Brown int sample_size; 327aae816dSMark Brown 333d8b2ce0SMark Brown sample_size = snd_pcm_format_width(params_format(params)); 343d8b2ce0SMark Brown if (sample_size < 0) 353d8b2ce0SMark Brown return sample_size; 367aae816dSMark Brown 377aae816dSMark Brown return snd_soc_calc_frame_size(sample_size, params_channels(params), 387aae816dSMark Brown 1); 397aae816dSMark Brown } 407aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); 417aae816dSMark Brown 42c0fa59dfSMark Brown int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) 43c0fa59dfSMark Brown { 44c0fa59dfSMark Brown return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); 45c0fa59dfSMark Brown } 46c0fa59dfSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); 47c0fa59dfSMark Brown 487aae816dSMark Brown int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) 497aae816dSMark Brown { 507aae816dSMark Brown int ret; 517aae816dSMark Brown 527aae816dSMark Brown ret = snd_soc_params_to_frame_size(params); 537aae816dSMark Brown 547aae816dSMark Brown if (ret > 0) 557aae816dSMark Brown return ret * params_rate(params); 567aae816dSMark Brown else 577aae816dSMark Brown return ret; 587aae816dSMark Brown } 597aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); 60848dd8beSMark Brown 61cefcc03fSMark Brown static const struct snd_pcm_hardware dummy_dma_hardware = { 62cefcc03fSMark Brown /* Random values to keep userspace happy when checking constraints */ 63cefcc03fSMark Brown .info = SNDRV_PCM_INFO_INTERLEAVED | 64cefcc03fSMark Brown SNDRV_PCM_INFO_BLOCK_TRANSFER, 65cefcc03fSMark Brown .buffer_bytes_max = 128*1024, 66cefcc03fSMark Brown .period_bytes_min = PAGE_SIZE, 67cefcc03fSMark Brown .period_bytes_max = PAGE_SIZE*2, 68cefcc03fSMark Brown .periods_min = 2, 69cefcc03fSMark Brown .periods_max = 128, 70cefcc03fSMark Brown }; 71cefcc03fSMark Brown 72cefcc03fSMark Brown static int dummy_dma_open(struct snd_pcm_substream *substream) 73cefcc03fSMark Brown { 747f05cc98SLiam Girdwood struct snd_soc_pcm_runtime *rtd = substream->private_data; 757f05cc98SLiam Girdwood 767f05cc98SLiam Girdwood /* BE's dont need dummy params */ 777f05cc98SLiam Girdwood if (!rtd->dai_link->no_pcm) 78cefcc03fSMark Brown snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware); 79cefcc03fSMark Brown 80cefcc03fSMark Brown return 0; 81cefcc03fSMark Brown } 82cefcc03fSMark Brown 83cefcc03fSMark Brown static struct snd_pcm_ops dummy_dma_ops = { 84cefcc03fSMark Brown .open = dummy_dma_open, 85cefcc03fSMark Brown .ioctl = snd_pcm_lib_ioctl, 86cefcc03fSMark Brown }; 87cefcc03fSMark Brown 88cefcc03fSMark Brown static struct snd_soc_platform_driver dummy_platform = { 89cefcc03fSMark Brown .ops = &dummy_dma_ops, 90cefcc03fSMark Brown }; 91848dd8beSMark Brown 927aca69f9SLiam Girdwood static struct snd_soc_codec_driver dummy_codec; 9360b6f1a1SStas Sergeev 9460b6f1a1SStas Sergeev #define STUB_RATES SNDRV_PCM_RATE_8000_192000 9560b6f1a1SStas Sergeev #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 9660b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U8 | \ 9760b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S16_LE | \ 9860b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U16_LE | \ 9960b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S24_LE | \ 10060b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U24_LE | \ 10160b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S32_LE | \ 10260b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U32_LE | \ 10360b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) 104*d76f4198SAnatol Pomozov /* 105*d76f4198SAnatol Pomozov * The dummy CODEC is only meant to be used in situations where there is no 106*d76f4198SAnatol Pomozov * actual hardware. 107*d76f4198SAnatol Pomozov * 108*d76f4198SAnatol Pomozov * If there is actual hardware even if it does not have a control bus 109*d76f4198SAnatol Pomozov * the hardware will still have constraints like supported samplerates, etc. 110*d76f4198SAnatol Pomozov * which should be modelled. And the data flow graph also should be modelled 111*d76f4198SAnatol Pomozov * using DAPM. 112*d76f4198SAnatol Pomozov */ 1137aca69f9SLiam Girdwood static struct snd_soc_dai_driver dummy_dai = { 1147aca69f9SLiam Girdwood .name = "snd-soc-dummy-dai", 11560b6f1a1SStas Sergeev .playback = { 11660b6f1a1SStas Sergeev .stream_name = "Playback", 11760b6f1a1SStas Sergeev .channels_min = 1, 11860b6f1a1SStas Sergeev .channels_max = 384, 11960b6f1a1SStas Sergeev .rates = STUB_RATES, 12060b6f1a1SStas Sergeev .formats = STUB_FORMATS, 12160b6f1a1SStas Sergeev }, 12260b6f1a1SStas Sergeev .capture = { 12360b6f1a1SStas Sergeev .stream_name = "Capture", 12460b6f1a1SStas Sergeev .channels_min = 1, 12560b6f1a1SStas Sergeev .channels_max = 384, 12660b6f1a1SStas Sergeev .rates = STUB_RATES, 12760b6f1a1SStas Sergeev .formats = STUB_FORMATS, 12860b6f1a1SStas Sergeev }, 1297aca69f9SLiam Girdwood }; 1307aca69f9SLiam Girdwood 131bece9e95SLiam Girdwood int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) 132bece9e95SLiam Girdwood { 133bece9e95SLiam Girdwood if (dai->driver == &dummy_dai) 134bece9e95SLiam Girdwood return 1; 135bece9e95SLiam Girdwood return 0; 136bece9e95SLiam Girdwood } 137bece9e95SLiam Girdwood 138e51e97eeSBill Pemberton static int snd_soc_dummy_probe(struct platform_device *pdev) 139848dd8beSMark Brown { 1407aca69f9SLiam Girdwood int ret; 1417aca69f9SLiam Girdwood 1427aca69f9SLiam Girdwood ret = snd_soc_register_codec(&pdev->dev, &dummy_codec, &dummy_dai, 1); 1437aca69f9SLiam Girdwood if (ret < 0) 1447aca69f9SLiam Girdwood return ret; 1457aca69f9SLiam Girdwood 1467aca69f9SLiam Girdwood ret = snd_soc_register_platform(&pdev->dev, &dummy_platform); 1477aca69f9SLiam Girdwood if (ret < 0) { 1487aca69f9SLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 1497aca69f9SLiam Girdwood return ret; 1507aca69f9SLiam Girdwood } 1517aca69f9SLiam Girdwood 1527aca69f9SLiam Girdwood return ret; 153848dd8beSMark Brown } 154848dd8beSMark Brown 155e51e97eeSBill Pemberton static int snd_soc_dummy_remove(struct platform_device *pdev) 156848dd8beSMark Brown { 157848dd8beSMark Brown snd_soc_unregister_platform(&pdev->dev); 1587aca69f9SLiam Girdwood snd_soc_unregister_codec(&pdev->dev); 159848dd8beSMark Brown 160848dd8beSMark Brown return 0; 161848dd8beSMark Brown } 162848dd8beSMark Brown 163848dd8beSMark Brown static struct platform_driver soc_dummy_driver = { 164848dd8beSMark Brown .driver = { 165848dd8beSMark Brown .name = "snd-soc-dummy", 166848dd8beSMark Brown }, 167848dd8beSMark Brown .probe = snd_soc_dummy_probe, 168e51e97eeSBill Pemberton .remove = snd_soc_dummy_remove, 169848dd8beSMark Brown }; 170848dd8beSMark Brown 171848dd8beSMark Brown static struct platform_device *soc_dummy_dev; 172848dd8beSMark Brown 173fb257897SMark Brown int __init snd_soc_util_init(void) 174848dd8beSMark Brown { 175848dd8beSMark Brown int ret; 176848dd8beSMark Brown 1777d0cd223SUwe Kleine-König soc_dummy_dev = 1787d0cd223SUwe Kleine-König platform_device_register_simple("snd-soc-dummy", -1, NULL, 0); 1797d0cd223SUwe Kleine-König if (IS_ERR(soc_dummy_dev)) 1807d0cd223SUwe Kleine-König return PTR_ERR(soc_dummy_dev); 181848dd8beSMark Brown 182848dd8beSMark Brown ret = platform_driver_register(&soc_dummy_driver); 183848dd8beSMark Brown if (ret != 0) 184848dd8beSMark Brown platform_device_unregister(soc_dummy_dev); 185848dd8beSMark Brown 186848dd8beSMark Brown return ret; 187848dd8beSMark Brown } 188848dd8beSMark Brown 189fb257897SMark Brown void __exit snd_soc_util_exit(void) 190848dd8beSMark Brown { 191848dd8beSMark Brown platform_device_unregister(soc_dummy_dev); 192848dd8beSMark Brown platform_driver_unregister(&soc_dummy_driver); 193848dd8beSMark Brown } 194