kernel/sound/soc/intel/boards/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 <sound/jack.h>
  26 #include "../../codecs/rt5670.h"
  27 #include "../atom/sst-atom-controls.h"
  28
  29 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
  30 #define CHT_PLAT_CLK_3_HZ       19200000
  31 #define CHT_CODEC_DAI   "rt5670-aif1"
  32
  33 static struct snd_soc_jack cht_bsw_headset;
  34
  35 /* Headset jack detection DAPM pins */
  36 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
  37         {
  38                 .pin = "Headset Mic",
  39                 .mask = SND_JACK_MICROPHONE,
  40         },
  41         {
  42                 .pin = "Headphone",
  43                 .mask = SND_JACK_HEADPHONE,
  44         },
  45 };
  46
  47 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
  48 {
  49         int i;
  50
  51         for (i = 0; i < card->num_rtd; i++) {
  52                 struct snd_soc_pcm_runtime *rtd;
  53
  54                 rtd = card->rtd + i;
  55                 if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
  56                              strlen(CHT_CODEC_DAI)))
  57                         return rtd->codec_dai;
  58         }
  59         return NULL;
  60 }
  61
  62 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  63                 struct snd_kcontrol *k, int  event)
  64 {
  65         struct snd_soc_dapm_context *dapm = w->dapm;
  66         struct snd_soc_card *card = dapm->card;
  67         struct snd_soc_dai *codec_dai;
  68         int ret;
  69
  70         codec_dai = cht_get_codec_dai(card);
  71         if (!codec_dai) {
  72                 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
  73                 return -EIO;
  74         }
  75
  76         if (SND_SOC_DAPM_EVENT_ON(event)) {
  77                 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
  78                 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
  79                                 CHT_PLAT_CLK_3_HZ, 48000 * 512);
  80                 if (ret < 0) {
  81                         dev_err(card->dev, "can't set codec pll: %d\n", ret);
  82                         return ret;
  83                 }
  84
  85                 /* set codec sysclk source to PLL */
  86                 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
  87                         48000 * 512, SND_SOC_CLOCK_IN);
  88                 if (ret < 0) {
  89                         dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
  90                         return ret;
  91                 }
  92         } else {
  93                 /* Set codec sysclk source to its internal clock because codec
  94                  * PLL will be off when idle and MCLK will also be off by ACPI
  95                  * when codec is runtime suspended. Codec needs clock for jack
  96                  * detection and button press.
  97                  */
  98                 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
  99                                        48000 * 512, SND_SOC_CLOCK_IN);
 100         }
 101         return 0;
 102 }
 103
 104 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
 105         SND_SOC_DAPM_HP("Headphone", NULL),
 106         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 107         SND_SOC_DAPM_MIC("Int Mic", NULL),
 108         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 109         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
 110                         platform_clock_control, SND_SOC_DAPM_PRE_PMU |
 111                         SND_SOC_DAPM_POST_PMD),
 112 };
 113
 114 static const struct snd_soc_dapm_route cht_audio_map[] = {
 115         {"IN1P", NULL, "Headset Mic"},
 116         {"IN1N", NULL, "Headset Mic"},
 117         {"DMIC L1", NULL, "Int Mic"},
 118         {"DMIC R1", NULL, "Int Mic"},
 119         {"Headphone", NULL, "HPOL"},
 120         {"Headphone", NULL, "HPOR"},
 121         {"Ext Spk", NULL, "SPOLP"},
 122         {"Ext Spk", NULL, "SPOLN"},
 123         {"Ext Spk", NULL, "SPORP"},
 124         {"Ext Spk", NULL, "SPORN"},
 125         {"AIF1 Playback", NULL, "ssp2 Tx"},
 126         {"ssp2 Tx", NULL, "codec_out0"},
 127         {"ssp2 Tx", NULL, "codec_out1"},
 128         {"codec_in0", NULL, "ssp2 Rx"},
 129         {"codec_in1", NULL, "ssp2 Rx"},
 130         {"ssp2 Rx", NULL, "AIF1 Capture"},
 131         {"Headphone", NULL, "Platform Clock"},
 132         {"Headset Mic", NULL, "Platform Clock"},
 133         {"Int Mic", NULL, "Platform Clock"},
 134         {"Ext Spk", NULL, "Platform Clock"},
 135 };
 136
 137 static const struct snd_kcontrol_new cht_mc_controls[] = {
 138         SOC_DAPM_PIN_SWITCH("Headphone"),
 139         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 140         SOC_DAPM_PIN_SWITCH("Int Mic"),
 141         SOC_DAPM_PIN_SWITCH("Ext Spk"),
 142 };
 143
 144 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 145                                         struct snd_pcm_hw_params *params)
 146 {
 147         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 148         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 149         int ret;
 150
 151         /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 152         ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 153                                   CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 154         if (ret < 0) {
 155                 dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 156                 return ret;
 157         }
 158
 159         /* set codec sysclk source to PLL */
 160         ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 161                                      params_rate(params) * 512,
 162                                      SND_SOC_CLOCK_IN);
 163         if (ret < 0) {
 164                 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 165                 return ret;
 166         }
 167         return 0;
 168 }
 169
 170 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 171 {
 172         int ret;
 173         struct snd_soc_dai *codec_dai = runtime->codec_dai;
 174         struct snd_soc_codec *codec = codec_dai->codec;
 175
 176         /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 177         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
 178         if (ret < 0) {
 179                 dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
 180                 return ret;
 181         }
 182
 183         /* Select codec ASRC clock source to track I2S1 clock, because codec
 184          * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
 185          * be supported by RT5672. Otherwise, ASRC will be disabled and cause
 186          * noise.
 187          */
 188         rt5670_sel_asrc_clk_src(codec,
 189                                 RT5670_DA_STEREO_FILTER
 190                                 | RT5670_DA_MONO_L_FILTER
 191                                 | RT5670_DA_MONO_R_FILTER
 192                                 | RT5670_AD_STEREO_FILTER
 193                                 | RT5670_AD_MONO_L_FILTER
 194                                 | RT5670_AD_MONO_R_FILTER,
 195                                 RT5670_CLK_SEL_I2S1_ASRC);
 196
 197         ret = snd_soc_card_jack_new(runtime->card, "Headset",
 198                 SND_JACK_HEADSET | SND_JACK_BTN_0 |
 199                 SND_JACK_BTN_1 | SND_JACK_BTN_2, &cht_bsw_headset,
 200                 cht_bsw_headset_pins, ARRAY_SIZE(cht_bsw_headset_pins));
 201         if (ret)
 202                 return ret;
 203
 204         rt5670_set_jack_detect(codec, &cht_bsw_headset);
 205         return 0;
 206 }
 207
 208 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 209                             struct snd_pcm_hw_params *params)
 210 {
 211         struct snd_interval *rate = hw_param_interval(params,
 212                         SNDRV_PCM_HW_PARAM_RATE);
 213         struct snd_interval *channels = hw_param_interval(params,
 214                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 215
 216         /* The DSP will covert the FE rate to 48k, stereo, 24bits */
 217         rate->min = rate->max = 48000;
 218         channels->min = channels->max = 2;
 219
 220         /* set SSP2 to 24-bit */
 221         params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
 222         return 0;
 223 }
 224
 225 static unsigned int rates_48000[] = {
 226         48000,
 227 };
 228
 229 static struct snd_pcm_hw_constraint_list constraints_48000 = {
 230         .count = ARRAY_SIZE(rates_48000),
 231         .list  = rates_48000,
 232 };
 233
 234 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 235 {
 236         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 237                         SNDRV_PCM_HW_PARAM_RATE,
 238                         &constraints_48000);
 239 }
 240
 241 static struct snd_soc_ops cht_aif1_ops = {
 242         .startup = cht_aif1_startup,
 243 };
 244
 245 static struct snd_soc_ops cht_be_ssp2_ops = {
 246         .hw_params = cht_aif1_hw_params,
 247 };
 248
 249 static struct snd_soc_dai_link cht_dailink[] = {
 250         /* Front End DAI links */
 251         [MERR_DPCM_AUDIO] = {
 252                 .name = "Audio Port",
 253                 .stream_name = "Audio",
 254                 .cpu_dai_name = "media-cpu-dai",
 255                 .codec_dai_name = "snd-soc-dummy-dai",
 256                 .codec_name = "snd-soc-dummy",
 257                 .platform_name = "sst-mfld-platform",
 258                 .nonatomic = true,
 259                 .dynamic = 1,
 260                 .dpcm_playback = 1,
 261                 .dpcm_capture = 1,
 262                 .ops = &cht_aif1_ops,
 263         },
 264         [MERR_DPCM_COMPR] = {
 265                 .name = "Compressed Port",
 266                 .stream_name = "Compress",
 267                 .cpu_dai_name = "compress-cpu-dai",
 268                 .codec_dai_name = "snd-soc-dummy-dai",
 269                 .codec_name = "snd-soc-dummy",
 270                 .platform_name = "sst-mfld-platform",
 271         },
 272
 273         /* Back End DAI links */
 274         {
 275                 /* SSP2 - Codec */
 276                 .name = "SSP2-Codec",
 277                 .be_id = 1,
 278                 .cpu_dai_name = "ssp2-port",
 279                 .platform_name = "sst-mfld-platform",
 280                 .no_pcm = 1,
 281                 .nonatomic = true,
 282                 .codec_dai_name = "rt5670-aif1",
 283                 .codec_name = "i2c-10EC5670:00",
 284                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
 285                                         | SND_SOC_DAIFMT_CBS_CFS,
 286                 .init = cht_codec_init,
 287                 .be_hw_params_fixup = cht_codec_fixup,
 288                 .dpcm_playback = 1,
 289                 .dpcm_capture = 1,
 290                 .ops = &cht_be_ssp2_ops,
 291         },
 292 };
 293
 294 static int cht_suspend_pre(struct snd_soc_card *card)
 295 {
 296         struct snd_soc_codec *codec;
 297
 298         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 299                 if (!strcmp(codec->component.name, "i2c-10EC5670:00")) {
 300                         dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n");
 301                         rt5670_jack_suspend(codec);
 302                         break;
 303                 }
 304         }
 305         return 0;
 306 }
 307
 308 static int cht_resume_post(struct snd_soc_card *card)
 309 {
 310         struct snd_soc_codec *codec;
 311
 312         list_for_each_entry(codec, &card->codec_dev_list, card_list) {
 313                 if (!strcmp(codec->component.name, "i2c-10EC5670:00")) {
 314                         dev_dbg(codec->dev, "enabling jack detect for resume.\n");
 315                         rt5670_jack_resume(codec);
 316                         break;
 317                 }
 318         }
 319
 320         return 0;
 321 }
 322
 323 /* SoC card */
 324 static struct snd_soc_card snd_soc_card_cht = {
 325         .name = "cherrytrailcraudio",
 326         .dai_link = cht_dailink,
 327         .num_links = ARRAY_SIZE(cht_dailink),
 328         .dapm_widgets = cht_dapm_widgets,
 329         .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 330         .dapm_routes = cht_audio_map,
 331         .num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 332         .controls = cht_mc_controls,
 333         .num_controls = ARRAY_SIZE(cht_mc_controls),
 334         .suspend_pre = cht_suspend_pre,
 335         .resume_post = cht_resume_post,
 336 };
 337
 338 static int snd_cht_mc_probe(struct platform_device *pdev)
 339 {
 340         int ret_val = 0;
 341
 342         /* register the soc card */
 343         snd_soc_card_cht.dev = &pdev->dev;
 344         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 345         if (ret_val) {
 346                 dev_err(&pdev->dev,
 347                         "snd_soc_register_card failed %d\n", ret_val);
 348                 return ret_val;
 349         }
 350         platform_set_drvdata(pdev, &snd_soc_card_cht);
 351         return ret_val;
 352 }
 353
 354 static struct platform_driver snd_cht_mc_driver = {
 355         .driver = {
 356                 .name = "cht-bsw-rt5672",
 357         },
 358         .probe = snd_cht_mc_probe,
 359 };
 360
 361 module_platform_driver(snd_cht_mc_driver);
 362
 363 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 364 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 365 MODULE_LICENSE("GPL v2");
 366 MODULE_ALIAS("platform:cht-bsw-rt5672");