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1// SPDX-License-Identifier: GPL-2.0-only2/*3 *  bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up4 *  to make I2S signals observable on the Low-Speed connector. Audio codec5 *  is not managed by ASoC/DAPM6 *7 *  Copyright (C) 2015-2017 Intel Corp8 *9 *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~10 *11 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~12 */13 14#include <linux/module.h>15#include <sound/pcm.h>16#include <sound/pcm_params.h>17#include <sound/soc.h>18#include "../atom/sst-atom-controls.h"19 20static const struct snd_soc_dapm_widget widgets[] = {21	SND_SOC_DAPM_MIC("Mic", NULL),22	SND_SOC_DAPM_SPK("Speaker", NULL),23};24 25static const struct snd_kcontrol_new controls[] = {26	SOC_DAPM_PIN_SWITCH("Mic"),27	SOC_DAPM_PIN_SWITCH("Speaker"),28};29 30static const struct snd_soc_dapm_route audio_map[] = {31	{"ssp2 Tx", NULL, "codec_out0"},32	{"ssp2 Tx", NULL, "codec_out1"},33	{"codec_in0", NULL, "ssp2 Rx"},34	{"codec_in1", NULL, "ssp2 Rx"},35 36	{"ssp2 Rx", NULL, "Mic"},37	{"Speaker", NULL, "ssp2 Tx"},38};39 40static int codec_fixup(struct snd_soc_pcm_runtime *rtd,41			    struct snd_pcm_hw_params *params)42{43	struct snd_interval *rate = hw_param_interval(params,44			SNDRV_PCM_HW_PARAM_RATE);45	struct snd_interval *channels = hw_param_interval(params,46						SNDRV_PCM_HW_PARAM_CHANNELS);47	int ret;48 49	/* The DSP will convert the FE rate to 48k, stereo, 24bits */50	rate->min = rate->max = 48000;51	channels->min = channels->max = 2;52 53	/* set SSP2 to 24-bit */54	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);55 56	/*57	 * Default mode for SSP configuration is TDM 4 slot, override config58	 * with explicit setting to I2S 2ch 24-bit. The word length is set with59	 * dai_set_tdm_slot() since there is no other API exposed60	 */61	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0),62				  SND_SOC_DAIFMT_I2S     |63				  SND_SOC_DAIFMT_NB_NF   |64				  SND_SOC_DAIFMT_BP_FP);65 66	if (ret < 0) {67		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);68		return ret;69	}70 71	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, 24);72	if (ret < 0) {73		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);74		return ret;75	}76 77	return 0;78}79 80static const unsigned int rates_48000[] = {81	48000,82};83 84static const struct snd_pcm_hw_constraint_list constraints_48000 = {85	.count = ARRAY_SIZE(rates_48000),86	.list  = rates_48000,87};88 89static int aif1_startup(struct snd_pcm_substream *substream)90{91	return snd_pcm_hw_constraint_list(substream->runtime, 0,92			SNDRV_PCM_HW_PARAM_RATE,93			&constraints_48000);94}95 96static const struct snd_soc_ops aif1_ops = {97	.startup = aif1_startup,98};99 100SND_SOC_DAILINK_DEF(dummy,101	DAILINK_COMP_ARRAY(COMP_DUMMY()));102 103SND_SOC_DAILINK_DEF(media,104	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));105 106SND_SOC_DAILINK_DEF(deepbuffer,107	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));108 109SND_SOC_DAILINK_DEF(ssp2_port,110	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));111 112SND_SOC_DAILINK_DEF(platform,113	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));114 115static struct snd_soc_dai_link dais[] = {116	[MERR_DPCM_AUDIO] = {117		.name = "Audio Port",118		.stream_name = "Audio",119		.ignore_suspend = 1,120		.nonatomic = true,121		.dynamic = 1,122		.dpcm_playback = 1,123		.dpcm_capture = 1,124		.ops = &aif1_ops,125		SND_SOC_DAILINK_REG(media, dummy, platform),126	},127	[MERR_DPCM_DEEP_BUFFER] = {128		.name = "Deep-Buffer Audio Port",129		.stream_name = "Deep-Buffer Audio",130		.ignore_suspend = 1,131		.nonatomic = true,132		.dynamic = 1,133		.dpcm_playback = 1,134		.ops = &aif1_ops,135		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),136	},137	/* CODEC<->CODEC link */138	/* back ends */139	{140		.name = "SSP2-LowSpeed Connector",141		.id = 0,142		.no_pcm = 1,143		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF144						| SND_SOC_DAIFMT_CBC_CFC,145		.be_hw_params_fixup = codec_fixup,146		.ignore_suspend = 1,147		.dpcm_playback = 1,148		.dpcm_capture = 1,149		SND_SOC_DAILINK_REG(ssp2_port, dummy, platform),150	},151};152 153/* SoC card */154static struct snd_soc_card bytcht_nocodec_card = {155	.name = "bytcht-nocodec",156	.owner = THIS_MODULE,157	.dai_link = dais,158	.num_links = ARRAY_SIZE(dais),159	.dapm_widgets = widgets,160	.num_dapm_widgets = ARRAY_SIZE(widgets),161	.dapm_routes = audio_map,162	.num_dapm_routes = ARRAY_SIZE(audio_map),163	.controls = controls,164	.num_controls = ARRAY_SIZE(controls),165	.fully_routed = true,166};167 168static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev)169{170	int ret_val = 0;171 172	/* register the soc card */173	bytcht_nocodec_card.dev = &pdev->dev;174 175	ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card);176 177	if (ret_val) {178		dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n",179			ret_val);180		return ret_val;181	}182	platform_set_drvdata(pdev, &bytcht_nocodec_card);183	return ret_val;184}185 186static struct platform_driver snd_bytcht_nocodec_mc_driver = {187	.driver = {188		.name = "bytcht_nocodec",189	},190	.probe = snd_bytcht_nocodec_mc_probe,191};192module_platform_driver(snd_bytcht_nocodec_mc_driver);193 194MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver");195MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>");196MODULE_LICENSE("GPL v2");197MODULE_ALIAS("platform:bytcht_nocodec");198