sound/soc/intel/boards/bytcht_es8316.c

   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");