1632628dfSKuninori Morimoto // SPDX-License-Identifier: GPL-2.0+ 2632628dfSKuninori Morimoto // 3632628dfSKuninori Morimoto // soc-util.c -- ALSA SoC Audio Layer utility functions 4632628dfSKuninori Morimoto // 5632628dfSKuninori Morimoto // Copyright 2009 Wolfson Microelectronics PLC. 6632628dfSKuninori Morimoto // 7632628dfSKuninori Morimoto // Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8632628dfSKuninori Morimoto // Liam Girdwood <lrg@slimlogic.co.uk> 97aae816dSMark Brown 10848dd8beSMark Brown #include <linux/platform_device.h> 11d81a6d71SPaul Gortmaker #include <linux/export.h> 127aae816dSMark Brown #include <sound/core.h> 137aae816dSMark Brown #include <sound/pcm.h> 147aae816dSMark Brown #include <sound/pcm_params.h> 157aae816dSMark Brown #include <sound/soc.h> 167aae816dSMark Brown 177aae816dSMark Brown int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots) 187aae816dSMark Brown { 197aae816dSMark Brown return sample_size * channels * tdm_slots; 207aae816dSMark Brown } 217aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_frame_size); 227aae816dSMark Brown 237aae816dSMark Brown int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params) 247aae816dSMark Brown { 257aae816dSMark Brown int sample_size; 267aae816dSMark Brown 273d8b2ce0SMark Brown sample_size = snd_pcm_format_width(params_format(params)); 283d8b2ce0SMark Brown if (sample_size < 0) 293d8b2ce0SMark Brown return sample_size; 307aae816dSMark Brown 317aae816dSMark Brown return snd_soc_calc_frame_size(sample_size, params_channels(params), 327aae816dSMark Brown 1); 337aae816dSMark Brown } 347aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_frame_size); 357aae816dSMark Brown 36c0fa59dfSMark Brown int snd_soc_calc_bclk(int fs, int sample_size, int channels, int tdm_slots) 37c0fa59dfSMark Brown { 38c0fa59dfSMark Brown return fs * snd_soc_calc_frame_size(sample_size, channels, tdm_slots); 39c0fa59dfSMark Brown } 40c0fa59dfSMark Brown EXPORT_SYMBOL_GPL(snd_soc_calc_bclk); 41c0fa59dfSMark Brown 427aae816dSMark Brown int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params) 437aae816dSMark Brown { 447aae816dSMark Brown int ret; 457aae816dSMark Brown 467aae816dSMark Brown ret = snd_soc_params_to_frame_size(params); 477aae816dSMark Brown 487aae816dSMark Brown if (ret > 0) 497aae816dSMark Brown return ret * params_rate(params); 507aae816dSMark Brown else 517aae816dSMark Brown return ret; 527aae816dSMark Brown } 537aae816dSMark Brown EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk); 54848dd8beSMark Brown 55cefcc03fSMark Brown static const struct snd_pcm_hardware dummy_dma_hardware = { 56cefcc03fSMark Brown /* Random values to keep userspace happy when checking constraints */ 57cefcc03fSMark Brown .info = SNDRV_PCM_INFO_INTERLEAVED | 58cefcc03fSMark Brown SNDRV_PCM_INFO_BLOCK_TRANSFER, 59cefcc03fSMark Brown .buffer_bytes_max = 128*1024, 60cefcc03fSMark Brown .period_bytes_min = PAGE_SIZE, 61cefcc03fSMark Brown .period_bytes_max = PAGE_SIZE*2, 62cefcc03fSMark Brown .periods_min = 2, 63cefcc03fSMark Brown .periods_max = 128, 64cefcc03fSMark Brown }; 65cefcc03fSMark Brown 66*6c504663SAmadeusz Sławiński 67*6c504663SAmadeusz Sławiński static const struct snd_soc_component_driver dummy_platform; 68*6c504663SAmadeusz Sławiński 69a49e460fSKuninori Morimoto static int dummy_dma_open(struct snd_soc_component *component, 70a49e460fSKuninori Morimoto struct snd_pcm_substream *substream) 71cefcc03fSMark Brown { 720ceef681SKuninori Morimoto struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); 73*6c504663SAmadeusz Sławiński int i; 74*6c504663SAmadeusz Sławiński 75*6c504663SAmadeusz Sławiński /* 76*6c504663SAmadeusz Sławiński * If there are other components associated with rtd, we shouldn't 77*6c504663SAmadeusz Sławiński * override their hwparams 78*6c504663SAmadeusz Sławiński */ 79*6c504663SAmadeusz Sławiński for_each_rtd_components(rtd, i, component) { 80*6c504663SAmadeusz Sławiński if (component->driver == &dummy_platform) 81*6c504663SAmadeusz Sławiński return 0; 82*6c504663SAmadeusz Sławiński } 837f05cc98SLiam Girdwood 847f05cc98SLiam Girdwood /* BE's dont need dummy params */ 857f05cc98SLiam Girdwood if (!rtd->dai_link->no_pcm) 86cefcc03fSMark Brown snd_soc_set_runtime_hwparams(substream, &dummy_dma_hardware); 87cefcc03fSMark Brown 88cefcc03fSMark Brown return 0; 89cefcc03fSMark Brown } 90cefcc03fSMark Brown 912d59ebd3SKuninori Morimoto static const struct snd_soc_component_driver dummy_platform = { 92a49e460fSKuninori Morimoto .open = dummy_dma_open, 93cefcc03fSMark Brown }; 94848dd8beSMark Brown 9503a0ddedSKuninori Morimoto static const struct snd_soc_component_driver dummy_codec = { 9603a0ddedSKuninori Morimoto .idle_bias_on = 1, 9703a0ddedSKuninori Morimoto .use_pmdown_time = 1, 9803a0ddedSKuninori Morimoto .endianness = 1, 9903a0ddedSKuninori Morimoto .non_legacy_dai_naming = 1, 10003a0ddedSKuninori Morimoto }; 10160b6f1a1SStas Sergeev 102abc17b29SRohit kumar #define STUB_RATES SNDRV_PCM_RATE_8000_384000 10360b6f1a1SStas Sergeev #define STUB_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 10460b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U8 | \ 10560b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S16_LE | \ 10660b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U16_LE | \ 10760b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S24_LE | \ 108abc17b29SRohit kumar SNDRV_PCM_FMTBIT_S24_3LE | \ 10960b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U24_LE | \ 11060b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_S32_LE | \ 11160b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_U32_LE | \ 11260b6f1a1SStas Sergeev SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE) 113ba9e82a1SKuninori Morimoto 114ba9e82a1SKuninori Morimoto /* 115ba9e82a1SKuninori Morimoto * Select these from Sound Card Manually 116ba9e82a1SKuninori Morimoto * SND_SOC_POSSIBLE_DAIFMT_CBP_CFP 117ba9e82a1SKuninori Morimoto * SND_SOC_POSSIBLE_DAIFMT_CBP_CFC 118ba9e82a1SKuninori Morimoto * SND_SOC_POSSIBLE_DAIFMT_CBC_CFP 119ba9e82a1SKuninori Morimoto * SND_SOC_POSSIBLE_DAIFMT_CBC_CFC 120ba9e82a1SKuninori Morimoto */ 121ba9e82a1SKuninori Morimoto static u64 dummy_dai_formats = 122ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_I2S | 123ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_RIGHT_J | 124ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_LEFT_J | 125ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_DSP_A | 126ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_DSP_B | 127ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_AC97 | 128ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_PDM | 129ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_GATED | 130ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_CONT | 131ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_NB_NF | 132ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_NB_IF | 133ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_IB_NF | 134ba9e82a1SKuninori Morimoto SND_SOC_POSSIBLE_DAIFMT_IB_IF; 135ba9e82a1SKuninori Morimoto 136ba9e82a1SKuninori Morimoto static const struct snd_soc_dai_ops dummy_dai_ops = { 137ba9e82a1SKuninori Morimoto .auto_selectable_formats = &dummy_dai_formats, 138ba9e82a1SKuninori Morimoto .num_auto_selectable_formats = 1, 139ba9e82a1SKuninori Morimoto }; 140ba9e82a1SKuninori Morimoto 141d76f4198SAnatol Pomozov /* 142d76f4198SAnatol Pomozov * The dummy CODEC is only meant to be used in situations where there is no 143d76f4198SAnatol Pomozov * actual hardware. 144d76f4198SAnatol Pomozov * 145d76f4198SAnatol Pomozov * If there is actual hardware even if it does not have a control bus 146d76f4198SAnatol Pomozov * the hardware will still have constraints like supported samplerates, etc. 147d76f4198SAnatol Pomozov * which should be modelled. And the data flow graph also should be modelled 148d76f4198SAnatol Pomozov * using DAPM. 149d76f4198SAnatol Pomozov */ 1507aca69f9SLiam Girdwood static struct snd_soc_dai_driver dummy_dai = { 1517aca69f9SLiam Girdwood .name = "snd-soc-dummy-dai", 15260b6f1a1SStas Sergeev .playback = { 15360b6f1a1SStas Sergeev .stream_name = "Playback", 15460b6f1a1SStas Sergeev .channels_min = 1, 15560b6f1a1SStas Sergeev .channels_max = 384, 15660b6f1a1SStas Sergeev .rates = STUB_RATES, 15760b6f1a1SStas Sergeev .formats = STUB_FORMATS, 15860b6f1a1SStas Sergeev }, 15960b6f1a1SStas Sergeev .capture = { 16060b6f1a1SStas Sergeev .stream_name = "Capture", 16160b6f1a1SStas Sergeev .channels_min = 1, 16260b6f1a1SStas Sergeev .channels_max = 384, 16360b6f1a1SStas Sergeev .rates = STUB_RATES, 16460b6f1a1SStas Sergeev .formats = STUB_FORMATS, 16560b6f1a1SStas Sergeev }, 166ba9e82a1SKuninori Morimoto .ops = &dummy_dai_ops, 1677aca69f9SLiam Girdwood }; 1687aca69f9SLiam Girdwood 169bece9e95SLiam Girdwood int snd_soc_dai_is_dummy(struct snd_soc_dai *dai) 170bece9e95SLiam Girdwood { 171bece9e95SLiam Girdwood if (dai->driver == &dummy_dai) 172bece9e95SLiam Girdwood return 1; 173bece9e95SLiam Girdwood return 0; 174bece9e95SLiam Girdwood } 175bece9e95SLiam Girdwood 1768f1a1681SKuninori Morimoto int snd_soc_component_is_dummy(struct snd_soc_component *component) 1778f1a1681SKuninori Morimoto { 1788f1a1681SKuninori Morimoto return ((component->driver == &dummy_platform) || 1798f1a1681SKuninori Morimoto (component->driver == &dummy_codec)); 1808f1a1681SKuninori Morimoto } 1818f1a1681SKuninori Morimoto 182e51e97eeSBill Pemberton static int snd_soc_dummy_probe(struct platform_device *pdev) 183848dd8beSMark Brown { 1847aca69f9SLiam Girdwood int ret; 1857aca69f9SLiam Girdwood 18603a0ddedSKuninori Morimoto ret = devm_snd_soc_register_component(&pdev->dev, 18703a0ddedSKuninori Morimoto &dummy_codec, &dummy_dai, 1); 1887aca69f9SLiam Girdwood if (ret < 0) 1897aca69f9SLiam Girdwood return ret; 1907aca69f9SLiam Girdwood 1912d59ebd3SKuninori Morimoto ret = devm_snd_soc_register_component(&pdev->dev, &dummy_platform, 1922d59ebd3SKuninori Morimoto NULL, 0); 1937aca69f9SLiam Girdwood 1947aca69f9SLiam Girdwood return ret; 195848dd8beSMark Brown } 196848dd8beSMark Brown 197848dd8beSMark Brown static struct platform_driver soc_dummy_driver = { 198848dd8beSMark Brown .driver = { 199848dd8beSMark Brown .name = "snd-soc-dummy", 200848dd8beSMark Brown }, 201848dd8beSMark Brown .probe = snd_soc_dummy_probe, 202848dd8beSMark Brown }; 203848dd8beSMark Brown 204848dd8beSMark Brown static struct platform_device *soc_dummy_dev; 205848dd8beSMark Brown 206fb257897SMark Brown int __init snd_soc_util_init(void) 207848dd8beSMark Brown { 208848dd8beSMark Brown int ret; 209848dd8beSMark Brown 2107d0cd223SUwe Kleine-König soc_dummy_dev = 2117d0cd223SUwe Kleine-König platform_device_register_simple("snd-soc-dummy", -1, NULL, 0); 2127d0cd223SUwe Kleine-König if (IS_ERR(soc_dummy_dev)) 2137d0cd223SUwe Kleine-König return PTR_ERR(soc_dummy_dev); 214848dd8beSMark Brown 215848dd8beSMark Brown ret = platform_driver_register(&soc_dummy_driver); 216848dd8beSMark Brown if (ret != 0) 217848dd8beSMark Brown platform_device_unregister(soc_dummy_dev); 218848dd8beSMark Brown 219848dd8beSMark Brown return ret; 220848dd8beSMark Brown } 221848dd8beSMark Brown 222fb257897SMark Brown void __exit snd_soc_util_exit(void) 223848dd8beSMark Brown { 224848dd8beSMark Brown platform_driver_unregister(&soc_dummy_driver); 225b66c9b91SFabio Estevam platform_device_unregister(soc_dummy_dev); 226848dd8beSMark Brown } 227