1 /* 2 * bytcht_nocodec.c - ASoc Machine driver for MinnowBoard Max and Up 3 * to make I2S signals observable on the Low-Speed connector. Audio codec 4 * is not managed by ASoC/DAPM 5 * 6 * Copyright (C) 2015-2017 Intel Corp 7 * 8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; version 2 of the License. 13 * 14 * This program is distributed in the hope that it will be useful, but 15 * WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * General Public License for more details. 18 * 19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 20 */ 21 22 #include <linux/module.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include "../atom/sst-atom-controls.h" 27 28 static const struct snd_soc_dapm_widget widgets[] = { 29 SND_SOC_DAPM_MIC("Mic", NULL), 30 SND_SOC_DAPM_SPK("Speaker", NULL), 31 }; 32 33 static const struct snd_kcontrol_new controls[] = { 34 SOC_DAPM_PIN_SWITCH("Mic"), 35 SOC_DAPM_PIN_SWITCH("Speaker"), 36 }; 37 38 static const struct snd_soc_dapm_route audio_map[] = { 39 {"ssp2 Tx", NULL, "codec_out0"}, 40 {"ssp2 Tx", NULL, "codec_out1"}, 41 {"codec_in0", NULL, "ssp2 Rx"}, 42 {"codec_in1", NULL, "ssp2 Rx"}, 43 44 {"ssp2 Rx", NULL, "Mic"}, 45 {"Speaker", NULL, "ssp2 Tx"}, 46 }; 47 48 static int codec_fixup(struct snd_soc_pcm_runtime *rtd, 49 struct snd_pcm_hw_params *params) 50 { 51 struct snd_interval *rate = hw_param_interval(params, 52 SNDRV_PCM_HW_PARAM_RATE); 53 struct snd_interval *channels = hw_param_interval(params, 54 SNDRV_PCM_HW_PARAM_CHANNELS); 55 int ret; 56 57 /* The DSP will convert the FE rate to 48k, stereo, 24bits */ 58 rate->min = rate->max = 48000; 59 channels->min = channels->max = 2; 60 61 /* set SSP2 to 24-bit */ 62 params_set_format(params, SNDRV_PCM_FORMAT_S24_LE); 63 64 /* 65 * Default mode for SSP configuration is TDM 4 slot, override config 66 * with explicit setting to I2S 2ch 24-bit. The word length is set with 67 * dai_set_tdm_slot() since there is no other API exposed 68 */ 69 ret = snd_soc_dai_set_fmt(rtd->cpu_dai, 70 SND_SOC_DAIFMT_I2S | 71 SND_SOC_DAIFMT_NB_NF | 72 SND_SOC_DAIFMT_CBS_CFS); 73 74 if (ret < 0) { 75 dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret); 76 return ret; 77 } 78 79 ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 24); 80 if (ret < 0) { 81 dev_err(rtd->dev, "can't set I2S config, err %d\n", ret); 82 return ret; 83 } 84 85 return 0; 86 } 87 88 static const unsigned int rates_48000[] = { 89 48000, 90 }; 91 92 static const struct snd_pcm_hw_constraint_list constraints_48000 = { 93 .count = ARRAY_SIZE(rates_48000), 94 .list = rates_48000, 95 }; 96 97 static int aif1_startup(struct snd_pcm_substream *substream) 98 { 99 return snd_pcm_hw_constraint_list(substream->runtime, 0, 100 SNDRV_PCM_HW_PARAM_RATE, 101 &constraints_48000); 102 } 103 104 static struct snd_soc_ops aif1_ops = { 105 .startup = aif1_startup, 106 }; 107 108 static struct snd_soc_dai_link dais[] = { 109 [MERR_DPCM_AUDIO] = { 110 .name = "Audio Port", 111 .stream_name = "Audio", 112 .cpu_dai_name = "media-cpu-dai", 113 .codec_dai_name = "snd-soc-dummy-dai", 114 .codec_name = "snd-soc-dummy", 115 .platform_name = "sst-mfld-platform", 116 .ignore_suspend = 1, 117 .nonatomic = true, 118 .dynamic = 1, 119 .dpcm_playback = 1, 120 .dpcm_capture = 1, 121 .ops = &aif1_ops, 122 }, 123 [MERR_DPCM_DEEP_BUFFER] = { 124 .name = "Deep-Buffer Audio Port", 125 .stream_name = "Deep-Buffer Audio", 126 .cpu_dai_name = "deepbuffer-cpu-dai", 127 .codec_dai_name = "snd-soc-dummy-dai", 128 .codec_name = "snd-soc-dummy", 129 .platform_name = "sst-mfld-platform", 130 .ignore_suspend = 1, 131 .nonatomic = true, 132 .dynamic = 1, 133 .dpcm_playback = 1, 134 .ops = &aif1_ops, 135 }, 136 /* CODEC<->CODEC link */ 137 /* back ends */ 138 { 139 .name = "SSP2-LowSpeed Connector", 140 .id = 0, 141 .cpu_dai_name = "ssp2-port", 142 .platform_name = "sst-mfld-platform", 143 .no_pcm = 1, 144 .codec_dai_name = "snd-soc-dummy-dai", 145 .codec_name = "snd-soc-dummy", 146 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 147 | SND_SOC_DAIFMT_CBS_CFS, 148 .be_hw_params_fixup = codec_fixup, 149 .ignore_suspend = 1, 150 .nonatomic = true, 151 .dpcm_playback = 1, 152 .dpcm_capture = 1, 153 }, 154 }; 155 156 /* SoC card */ 157 static struct snd_soc_card bytcht_nocodec_card = { 158 .name = "bytcht-nocodec", 159 .owner = THIS_MODULE, 160 .dai_link = dais, 161 .num_links = ARRAY_SIZE(dais), 162 .dapm_widgets = widgets, 163 .num_dapm_widgets = ARRAY_SIZE(widgets), 164 .dapm_routes = audio_map, 165 .num_dapm_routes = ARRAY_SIZE(audio_map), 166 .controls = controls, 167 .num_controls = ARRAY_SIZE(controls), 168 .fully_routed = true, 169 }; 170 171 static int snd_bytcht_nocodec_mc_probe(struct platform_device *pdev) 172 { 173 int ret_val = 0; 174 175 /* register the soc card */ 176 bytcht_nocodec_card.dev = &pdev->dev; 177 178 ret_val = devm_snd_soc_register_card(&pdev->dev, &bytcht_nocodec_card); 179 180 if (ret_val) { 181 dev_err(&pdev->dev, "devm_snd_soc_register_card failed %d\n", 182 ret_val); 183 return ret_val; 184 } 185 platform_set_drvdata(pdev, &bytcht_nocodec_card); 186 return ret_val; 187 } 188 189 static struct platform_driver snd_bytcht_nocodec_mc_driver = { 190 .driver = { 191 .name = "bytcht_nocodec", 192 }, 193 .probe = snd_bytcht_nocodec_mc_probe, 194 }; 195 module_platform_driver(snd_bytcht_nocodec_mc_driver); 196 197 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Nocodec Machine driver"); 198 MODULE_AUTHOR("Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>"); 199 MODULE_LICENSE("GPL v2"); 200 MODULE_ALIAS("platform:bytcht_nocodec"); 201