1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up 4 * to make I2S signals observable on the Low-Speed connector. Audio codec 5 * is not managed by ASoC/DAPM 6 * 7 * Copyright (C) 2015-2017 Intel Corp 8 * 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 20 static const struct snd_soc_dapm_widget widgets[] = { 21 SND_SOC_DAPM_MIC("Mic", NULL), 22 SND_SOC_DAPM_SPK("Speaker", NULL), 23 }; 24 25 static const struct snd_kcontrol_new controls[] = { 26 SOC_DAPM_PIN_SWITCH("Mic"), 27 SOC_DAPM_PIN_SWITCH("Speaker"), 28 }; 29 30 static 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 40 static 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 config 58 * with explicit setting to I2S 2ch 24-bit. The word length is set with 59 * dai_set_tdm_slot() since there is no other API exposed 60 */ 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 80 static const unsigned int rates_48000[] = { 81 48000, 82 }; 83 84 static const struct snd_pcm_hw_constraint_list constraints_48000 = { 85 .count = ARRAY_SIZE(rates_48000), 86 .list = rates_48000, 87 }; 88 89 static 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 96 static const struct snd_soc_ops aif1_ops = { 97 .startup = aif1_startup, 98 }; 99 100 SND_SOC_DAILINK_DEF(dummy, 101 DAILINK_COMP_ARRAY(COMP_DUMMY())); 102 103 SND_SOC_DAILINK_DEF(media, 104 DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai"))); 105 106 SND_SOC_DAILINK_DEF(deepbuffer, 107 DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai"))); 108 109 SND_SOC_DAILINK_DEF(ssp2_port, 110 DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port"))); 111 112 SND_SOC_DAILINK_DEF(platform, 113 DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform"))); 114 115 static 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_NF 144 | 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 */ 154 static 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 }; 167 168 static 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 } 185 186 static struct platform_driver snd_bytcht_nocodec_mc_driver = { 187 .driver = { 188 .name = "bytcht_nocodec", 189 }, 190 .probe = snd_bytcht_nocodec_mc_probe, 191 }; 192 module_platform_driver(snd_bytcht_nocodec_mc_driver); 193 194 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver"); 195 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>"); 196 MODULE_LICENSE("GPL v2"); 197 MODULE_ALIAS("platform:bytcht_nocodec"); 198