sound/soc/intel/cht_bsw_rt5672.c

   1 /*
   2  *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
   3  *                     Cherrytrail and Braswell, with RT5672 codec.
   4  *
   5  *  Copyright (C) 2014 Intel Corp
   6  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
   7  *          Mengdong Lin <mengdong.lin@intel.com>
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; version 2 of the License.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  */
  18
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/slab.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <sound/soc.h>
  25 #include "../codecs/rt5670.h"
  26 #include "sst-atom-controls.h"
  27
  28 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
  29 #define CHT_PLAT_CLK_3_HZ       19200000
  30 #define CHT_CODEC_DAI   "rt5670-aif1"
  31
  32 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
  33 {
  34         int i;
  35
  36         for (i = 0; i < card->num_rtd; i++) {
  37                 struct snd_soc_pcm_runtime *rtd;
  38
  39                 rtd = card->rtd + i;
  40                 if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
  41                              strlen(CHT_CODEC_DAI)))
  42                         return rtd->codec_dai;
  43         }
  44         return NULL;
  45 }
  46
  47 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  48                 struct snd_kcontrol *k, int  event)
  49 {
  50         struct snd_soc_dapm_context *dapm = w->dapm;
  51         struct snd_soc_card *card = dapm->card;
  52         struct snd_soc_dai *codec_dai;
  53
  54         codec_dai = cht_get_codec_dai(card);
  55         if (!codec_dai) {
  56                 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
  57                 return -EIO;
  58         }
  59
  60         if (!SND_SOC_DAPM_EVENT_OFF(event))
  61                 return 0;
  62
  63         /* Set codec sysclk source to its internal clock because codec PLL will
  64          * be off when idle and MCLK will also be off by ACPI when codec is
  65          * runtime suspended. Codec needs clock for jack detection and button
  66          * press.
  67          */
  68         snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
  69                                0, SND_SOC_CLOCK_IN);
  70
  71         return 0;
  72 }
  73
  74 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
  75         SND_SOC_DAPM_HP("Headphone", NULL),
  76         SND_SOC_DAPM_MIC("Headset Mic", NULL),
  77         SND_SOC_DAPM_MIC("Int Mic", NULL),
  78         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  79         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
  80                         platform_clock_control, SND_SOC_DAPM_POST_PMD),
  81 };
  82
  83 static const struct snd_soc_dapm_route cht_audio_map[] = {
  84         {"IN1P", NULL, "Headset Mic"},
  85         {"IN1N", NULL, "Headset Mic"},
  86         {"DMIC L1", NULL, "Int Mic"},
  87         {"DMIC R1", NULL, "Int Mic"},
  88         {"Headphone", NULL, "HPOL"},
  89         {"Headphone", NULL, "HPOR"},
  90         {"Ext Spk", NULL, "SPOLP"},
  91         {"Ext Spk", NULL, "SPOLN"},
  92         {"Ext Spk", NULL, "SPORP"},
  93         {"Ext Spk", NULL, "SPORN"},
  94         {"AIF1 Playback", NULL, "ssp2 Tx"},
  95         {"ssp2 Tx", NULL, "codec_out0"},
  96         {"ssp2 Tx", NULL, "codec_out1"},
  97         {"codec_in0", NULL, "ssp2 Rx"},
  98         {"codec_in1", NULL, "ssp2 Rx"},
  99         {"ssp2 Rx", NULL, "AIF1 Capture"},
 100         {"Headphone", NULL, "Platform Clock"},
 101         {"Headset Mic", NULL, "Platform Clock"},
 102         {"Int Mic", NULL, "Platform Clock"},
 103         {"Ext Spk", NULL, "Platform Clock"},
 104 };
 105
 106 static const struct snd_kcontrol_new cht_mc_controls[] = {
 107         SOC_DAPM_PIN_SWITCH("Headphone"),
 108         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 109         SOC_DAPM_PIN_SWITCH("Int Mic"),
 110         SOC_DAPM_PIN_SWITCH("Ext Spk"),
 111 };
 112
 113 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 114                                         struct snd_pcm_hw_params *params)
 115 {
 116         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 117         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 118         int ret;
 119
 120         /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 121         ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 122                                   CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 123         if (ret < 0) {
 124                 dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 125                 return ret;
 126         }
 127
 128         /* set codec sysclk source to PLL */
 129         ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 130                                      params_rate(params) * 512,
 131                                      SND_SOC_CLOCK_IN);
 132         if (ret < 0) {
 133                 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 134                 return ret;
 135         }
 136         return 0;
 137 }
 138
 139 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 140 {
 141         int ret;
 142         struct snd_soc_dai *codec_dai = runtime->codec_dai;
 143
 144         /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 145         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
 146         if (ret < 0) {
 147                 dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
 148                 return ret;
 149         }
 150
 151         return 0;
 152 }
 153
 154 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 155                             struct snd_pcm_hw_params *params)
 156 {
 157         struct snd_interval *rate = hw_param_interval(params,
 158                         SNDRV_PCM_HW_PARAM_RATE);
 159         struct snd_interval *channels = hw_param_interval(params,
 160                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 161
 162         /* The DSP will covert the FE rate to 48k, stereo, 24bits */
 163         rate->min = rate->max = 48000;
 164         channels->min = channels->max = 2;
 165
 166         /* set SSP2 to 24-bit */
 167         snd_mask_set(&params->masks[SNDRV_PCM_HW_PARAM_FORMAT -
 168                                     SNDRV_PCM_HW_PARAM_FIRST_MASK],
 169                                     SNDRV_PCM_FORMAT_S24_LE);
 170         return 0;
 171 }
 172
 173 static unsigned int rates_48000[] = {
 174         48000,
 175 };
 176
 177 static struct snd_pcm_hw_constraint_list constraints_48000 = {
 178         .count = ARRAY_SIZE(rates_48000),
 179         .list  = rates_48000,
 180 };
 181
 182 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 183 {
 184         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 185                         SNDRV_PCM_HW_PARAM_RATE,
 186                         &constraints_48000);
 187 }
 188
 189 static struct snd_soc_ops cht_aif1_ops = {
 190         .startup = cht_aif1_startup,
 191 };
 192
 193 static struct snd_soc_ops cht_be_ssp2_ops = {
 194         .hw_params = cht_aif1_hw_params,
 195 };
 196
 197 static struct snd_soc_dai_link cht_dailink[] = {
 198         /* Front End DAI links */
 199         [MERR_DPCM_AUDIO] = {
 200                 .name = "Audio Port",
 201                 .stream_name = "Audio",
 202                 .cpu_dai_name = "media-cpu-dai",
 203                 .codec_dai_name = "snd-soc-dummy-dai",
 204                 .codec_name = "snd-soc-dummy",
 205                 .platform_name = "sst-mfld-platform",
 206                 .ignore_suspend = 1,
 207                 .dynamic = 1,
 208                 .dpcm_playback = 1,
 209                 .dpcm_capture = 1,
 210                 .ops = &cht_aif1_ops,
 211         },
 212         [MERR_DPCM_COMPR] = {
 213                 .name = "Compressed Port",
 214                 .stream_name = "Compress",
 215                 .cpu_dai_name = "compress-cpu-dai",
 216                 .codec_dai_name = "snd-soc-dummy-dai",
 217                 .codec_name = "snd-soc-dummy",
 218                 .platform_name = "sst-mfld-platform",
 219         },
 220
 221         /* Back End DAI links */
 222         {
 223                 /* SSP2 - Codec */
 224                 .name = "SSP2-Codec",
 225                 .be_id = 1,
 226                 .cpu_dai_name = "ssp2-port",
 227                 .platform_name = "sst-mfld-platform",
 228                 .no_pcm = 1,
 229                 .codec_dai_name = "rt5670-aif1",
 230                 .codec_name = "i2c-10EC5670:00",
 231                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
 232                                         | SND_SOC_DAIFMT_CBS_CFS,
 233                 .init = cht_codec_init,
 234                 .be_hw_params_fixup = cht_codec_fixup,
 235                 .ignore_suspend = 1,
 236                 .dpcm_playback = 1,
 237                 .dpcm_capture = 1,
 238                 .ops = &cht_be_ssp2_ops,
 239         },
 240 };
 241
 242 /* SoC card */
 243 static struct snd_soc_card snd_soc_card_cht = {
 244         .name = "cherrytrailcraudio",
 245         .dai_link = cht_dailink,
 246         .num_links = ARRAY_SIZE(cht_dailink),
 247         .dapm_widgets = cht_dapm_widgets,
 248         .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 249         .dapm_routes = cht_audio_map,
 250         .num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 251         .controls = cht_mc_controls,
 252         .num_controls = ARRAY_SIZE(cht_mc_controls),
 253 };
 254
 255 static int snd_cht_mc_probe(struct platform_device *pdev)
 256 {
 257         int ret_val = 0;
 258
 259         /* register the soc card */
 260         snd_soc_card_cht.dev = &pdev->dev;
 261         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 262         if (ret_val) {
 263                 dev_err(&pdev->dev,
 264                         "snd_soc_register_card failed %d\n", ret_val);
 265                 return ret_val;
 266         }
 267         platform_set_drvdata(pdev, &snd_soc_card_cht);
 268         return ret_val;
 269 }
 270
 271 static struct platform_driver snd_cht_mc_driver = {
 272         .driver = {
 273                 .owner = THIS_MODULE,
 274                 .name = "cht-bsw-rt5672",
 275                 .pm = &snd_soc_pm_ops,
 276         },
 277         .probe = snd_cht_mc_probe,
 278 };
 279
 280 module_platform_driver(snd_cht_mc_driver);
 281
 282 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 283 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 284 MODULE_LICENSE("GPL v2");
 285 MODULE_ALIAS("platform:cht-bsw-rt5672");