1 /* 2 * bytcht_es8316.c - ASoc Machine driver for Intel Baytrail/Cherrytrail 3 * platforms with Everest ES8316 SoC 4 * 5 * Copyright (C) 2017 Endless Mobile, Inc. 6 * Authors: David Yang <yangxiaohua@everest-semi.com>, 7 * Daniel Drake <drake@endlessm.com> 8 * 9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; version 2 of the License. 14 * 15 * This program is distributed in the hope that it will be useful, but 16 * WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * General Public License for more details. 19 * 20 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 21 */ 22 #include <linux/init.h> 23 #include <linux/module.h> 24 #include <linux/platform_device.h> 25 #include <linux/device.h> 26 #include <linux/slab.h> 27 #include <asm/platform_sst_audio.h> 28 #include <linux/clk.h> 29 #include <sound/pcm.h> 30 #include <sound/pcm_params.h> 31 #include <sound/soc.h> 32 #include <sound/soc-acpi.h> 33 #include "../atom/sst-atom-controls.h" 34 #include "../common/sst-dsp.h" 35 36 struct byt_cht_es8316_private { 37 struct clk *mclk; 38 }; 39 40 static const struct snd_soc_dapm_widget byt_cht_es8316_widgets[] = { 41 SND_SOC_DAPM_HP("Headphone", NULL), 42 43 /* 44 * The codec supports two analog microphone inputs. I have only 45 * tested MIC1. A DMIC route could also potentially be added 46 * if such functionality is found on another platform. 47 */ 48 SND_SOC_DAPM_MIC("Microphone 1", NULL), 49 SND_SOC_DAPM_MIC("Microphone 2", NULL), 50 }; 51 52 static const struct snd_soc_dapm_route byt_cht_es8316_audio_map[] = { 53 {"MIC1", NULL, "Microphone 1"}, 54 {"MIC2", NULL, "Microphone 2"}, 55 56 {"Headphone", NULL, "HPOL"}, 57 {"Headphone", NULL, "HPOR"}, 58 59 {"Playback", NULL, "ssp2 Tx"}, 60 {"ssp2 Tx", NULL, "codec_out0"}, 61 {"ssp2 Tx", NULL, "codec_out1"}, 62 {"codec_in0", NULL, "ssp2 Rx" }, 63 {"codec_in1", NULL, "ssp2 Rx" }, 64 {"ssp2 Rx", NULL, "Capture"}, 65 }; 66 67 static const struct snd_kcontrol_new byt_cht_es8316_controls[] = { 68 SOC_DAPM_PIN_SWITCH("Headphone"), 69 SOC_DAPM_PIN_SWITCH("Microphone 1"), 70 SOC_DAPM_PIN_SWITCH("Microphone 2"), 71 }; 72 73 static int byt_cht_es8316_init(struct snd_soc_pcm_runtime *runtime) 74 { 75 struct snd_soc_card *card = runtime->card; 76 struct byt_cht_es8316_private *priv = snd_soc_card_get_drvdata(card); 77 int ret; 78 79 card->dapm.idle_bias_off = true; 80 81 /* 82 * The firmware might enable the clock at boot (this information 83 * may or may not be reflected in the enable clock register). 84 * To change the rate we must disable the clock first to cover these 85 * cases. Due to common clock framework restrictions that do not allow 86 * to disable a clock that has not been enabled, we need to enable 87 * the clock first. 88 */ 89 ret = clk_prepare_enable(priv->mclk); 90 if (!ret) 91 clk_disable_unprepare(priv->mclk); 92 93 ret = clk_set_rate(priv->mclk, 19200000); 94 if (ret) 95 dev_err(card->dev, "unable to set MCLK rate\n"); 96 97 ret = clk_prepare_enable(priv->mclk); 98 if (ret) 99 dev_err(card->dev, "unable to enable MCLK\n"); 100 101 ret = snd_soc_dai_set_sysclk(runtime->codec_dai, 0, 19200000, 102 SND_SOC_CLOCK_IN); 103 if (ret < 0) { 104 dev_err(card->dev, "can't set codec clock %d\n", ret); 105 return ret; 106 } 107 108 return 0; 109 } 110 111 static const struct snd_soc_pcm_stream byt_cht_es8316_dai_params = { 112 .formats = SNDRV_PCM_FMTBIT_S24_LE, 113 .rate_min = 48000, 114 .rate_max = 48000, 115 .channels_min = 2, 116 .channels_max = 2, 117 }; 118 119 static int byt_cht_es8316_codec_fixup(struct snd_soc_pcm_runtime *rtd, 120 struct snd_pcm_hw_params *params) 121 { 122 struct snd_interval *rate = hw_param_interval(params, 123 SNDRV_PCM_HW_PARAM_RATE); 124 struct snd_interval *channels = hw_param_interval(params, 125 SNDRV_PCM_HW_PARAM_CHANNELS); 126 int ret; 127 128 /* The DSP will covert the FE rate to 48k, stereo */ 129 rate->min = rate->max = 48000; 130 channels->min = channels->max = 2; 131 132 /* set SSP2 to 24-bit */ 133 params_set_format(params, SNDRV_PCM_FORMAT_S24_LE); 134 135 /* 136 * Default mode for SSP configuration is TDM 4 slot, override config 137 * with explicit setting to I2S 2ch 24-bit. The word length is set with 138 * dai_set_tdm_slot() since there is no other API exposed 139 */ 140 ret = snd_soc_dai_set_fmt(rtd->cpu_dai, 141 SND_SOC_DAIFMT_I2S | 142 SND_SOC_DAIFMT_NB_NF | 143 SND_SOC_DAIFMT_CBS_CFS 144 ); 145 if (ret < 0) { 146 dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret); 147 return ret; 148 } 149 150 ret = snd_soc_dai_set_tdm_slot(rtd->cpu_dai, 0x3, 0x3, 2, 24); 151 if (ret < 0) { 152 dev_err(rtd->dev, "can't set I2S config, err %d\n", ret); 153 return ret; 154 } 155 156 return 0; 157 } 158 159 static int byt_cht_es8316_aif1_startup(struct snd_pcm_substream *substream) 160 { 161 return snd_pcm_hw_constraint_single(substream->runtime, 162 SNDRV_PCM_HW_PARAM_RATE, 48000); 163 } 164 165 static const struct snd_soc_ops byt_cht_es8316_aif1_ops = { 166 .startup = byt_cht_es8316_aif1_startup, 167 }; 168 169 static struct snd_soc_dai_link byt_cht_es8316_dais[] = { 170 [MERR_DPCM_AUDIO] = { 171 .name = "Audio Port", 172 .stream_name = "Audio", 173 .cpu_dai_name = "media-cpu-dai", 174 .codec_dai_name = "snd-soc-dummy-dai", 175 .codec_name = "snd-soc-dummy", 176 .platform_name = "sst-mfld-platform", 177 .nonatomic = true, 178 .dynamic = 1, 179 .dpcm_playback = 1, 180 .dpcm_capture = 1, 181 .ops = &byt_cht_es8316_aif1_ops, 182 }, 183 184 [MERR_DPCM_DEEP_BUFFER] = { 185 .name = "Deep-Buffer Audio Port", 186 .stream_name = "Deep-Buffer Audio", 187 .cpu_dai_name = "deepbuffer-cpu-dai", 188 .codec_dai_name = "snd-soc-dummy-dai", 189 .codec_name = "snd-soc-dummy", 190 .platform_name = "sst-mfld-platform", 191 .nonatomic = true, 192 .dynamic = 1, 193 .dpcm_playback = 1, 194 .ops = &byt_cht_es8316_aif1_ops, 195 }, 196 197 /* back ends */ 198 { 199 /* Only SSP2 has been tested here, so BYT-CR platforms that 200 * require SSP0 will not work. 201 */ 202 .name = "SSP2-Codec", 203 .id = 0, 204 .cpu_dai_name = "ssp2-port", 205 .platform_name = "sst-mfld-platform", 206 .no_pcm = 1, 207 .codec_dai_name = "ES8316 HiFi", 208 .codec_name = "i2c-ESSX8316:00", 209 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 210 | SND_SOC_DAIFMT_CBS_CFS, 211 .be_hw_params_fixup = byt_cht_es8316_codec_fixup, 212 .nonatomic = true, 213 .dpcm_playback = 1, 214 .dpcm_capture = 1, 215 .init = byt_cht_es8316_init, 216 }, 217 }; 218 219 220 /* SoC card */ 221 static struct snd_soc_card byt_cht_es8316_card = { 222 .name = "bytcht-es8316", 223 .owner = THIS_MODULE, 224 .dai_link = byt_cht_es8316_dais, 225 .num_links = ARRAY_SIZE(byt_cht_es8316_dais), 226 .dapm_widgets = byt_cht_es8316_widgets, 227 .num_dapm_widgets = ARRAY_SIZE(byt_cht_es8316_widgets), 228 .dapm_routes = byt_cht_es8316_audio_map, 229 .num_dapm_routes = ARRAY_SIZE(byt_cht_es8316_audio_map), 230 .controls = byt_cht_es8316_controls, 231 .num_controls = ARRAY_SIZE(byt_cht_es8316_controls), 232 .fully_routed = true, 233 }; 234 235 static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev) 236 { 237 int ret = 0; 238 struct byt_cht_es8316_private *priv; 239 240 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_ATOMIC); 241 if (!priv) 242 return -ENOMEM; 243 244 /* register the soc card */ 245 byt_cht_es8316_card.dev = &pdev->dev; 246 snd_soc_card_set_drvdata(&byt_cht_es8316_card, priv); 247 248 priv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3"); 249 if (IS_ERR(priv->mclk)) { 250 ret = PTR_ERR(priv->mclk); 251 dev_err(&pdev->dev, 252 "Failed to get MCLK from pmc_plt_clk_3: %d\n", 253 ret); 254 return ret; 255 } 256 257 ret = devm_snd_soc_register_card(&pdev->dev, &byt_cht_es8316_card); 258 if (ret) { 259 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); 260 return ret; 261 } 262 platform_set_drvdata(pdev, &byt_cht_es8316_card); 263 return ret; 264 } 265 266 static struct platform_driver snd_byt_cht_es8316_mc_driver = { 267 .driver = { 268 .name = "bytcht_es8316", 269 }, 270 .probe = snd_byt_cht_es8316_mc_probe, 271 }; 272 273 module_platform_driver(snd_byt_cht_es8316_mc_driver); 274 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Machine driver"); 275 MODULE_AUTHOR("David Yang <yangxiaohua@everest-semi.com>"); 276 MODULE_LICENSE("GPL v2"); 277 MODULE_ALIAS("platform:bytcht_es8316"); 278