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/input.h>
  20 #include <linux/module.h>
  21 #include <linux/platform_device.h>
  22 #include <linux/slab.h>
  23 #include <linux/clk.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/jack.h>
  28 #include <sound/soc-acpi.h>
  29 #include "../../codecs/rt5670.h"
  30 #include "../atom/sst-atom-controls.h"
  31
  32
  33 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
  34 #define CHT_PLAT_CLK_3_HZ       19200000
  35 #define CHT_CODEC_DAI   "rt5670-aif1"
  36
  37 struct cht_mc_private {
  38         struct snd_soc_jack headset;
  39         char codec_name[SND_ACPI_I2C_ID_LEN];
  40         struct clk *mclk;
  41 };
  42
  43 /* Headset jack detection DAPM pins */
  44 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
  45         {
  46                 .pin = "Headset Mic",
  47                 .mask = SND_JACK_MICROPHONE,
  48         },
  49         {
  50                 .pin = "Headphone",
  51                 .mask = SND_JACK_HEADPHONE,
  52         },
  53 };
  54
  55 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  56                 struct snd_kcontrol *k, int  event)
  57 {
  58         struct snd_soc_dapm_context *dapm = w->dapm;
  59         struct snd_soc_card *card = dapm->card;
  60         struct snd_soc_dai *codec_dai;
  61         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
  62         int ret;
  63
  64         codec_dai = snd_soc_card_get_codec_dai(card, CHT_CODEC_DAI);
  65         if (!codec_dai) {
  66                 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
  67                 return -EIO;
  68         }
  69
  70         if (SND_SOC_DAPM_EVENT_ON(event)) {
  71                 if (ctx->mclk) {
  72                         ret = clk_prepare_enable(ctx->mclk);
  73                         if (ret < 0) {
  74                                 dev_err(card->dev,
  75                                         "could not configure MCLK state");
  76                                 return ret;
  77                         }
  78                 }
  79
  80                 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
  81                 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
  82                                 CHT_PLAT_CLK_3_HZ, 48000 * 512);
  83                 if (ret < 0) {
  84                         dev_err(card->dev, "can't set codec pll: %d\n", ret);
  85                         return ret;
  86                 }
  87
  88                 /* set codec sysclk source to PLL */
  89                 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
  90                         48000 * 512, SND_SOC_CLOCK_IN);
  91                 if (ret < 0) {
  92                         dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
  93                         return ret;
  94                 }
  95         } else {
  96                 /* Set codec sysclk source to its internal clock because codec
  97                  * PLL will be off when idle and MCLK will also be off by ACPI
  98                  * when codec is runtime suspended. Codec needs clock for jack
  99                  * detection and button press.
 100                  */
 101                 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
 102                                        48000 * 512, SND_SOC_CLOCK_IN);
 103
 104                 if (ctx->mclk)
 105                         clk_disable_unprepare(ctx->mclk);
 106         }
 107         return 0;
 108 }
 109
 110 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
 111         SND_SOC_DAPM_HP("Headphone", NULL),
 112         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 113         SND_SOC_DAPM_MIC("Int Mic", NULL),
 114         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 115         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
 116                         platform_clock_control, SND_SOC_DAPM_PRE_PMU |
 117                         SND_SOC_DAPM_POST_PMD),
 118 };
 119
 120 static const struct snd_soc_dapm_route cht_audio_map[] = {
 121         {"IN1P", NULL, "Headset Mic"},
 122         {"IN1N", NULL, "Headset Mic"},
 123         {"DMIC L1", NULL, "Int Mic"},
 124         {"DMIC R1", NULL, "Int Mic"},
 125         {"Headphone", NULL, "HPOL"},
 126         {"Headphone", NULL, "HPOR"},
 127         {"Ext Spk", NULL, "SPOLP"},
 128         {"Ext Spk", NULL, "SPOLN"},
 129         {"Ext Spk", NULL, "SPORP"},
 130         {"Ext Spk", NULL, "SPORN"},
 131         {"AIF1 Playback", NULL, "ssp2 Tx"},
 132         {"ssp2 Tx", NULL, "codec_out0"},
 133         {"ssp2 Tx", NULL, "codec_out1"},
 134         {"codec_in0", NULL, "ssp2 Rx"},
 135         {"codec_in1", NULL, "ssp2 Rx"},
 136         {"ssp2 Rx", NULL, "AIF1 Capture"},
 137         {"Headphone", NULL, "Platform Clock"},
 138         {"Headset Mic", NULL, "Platform Clock"},
 139         {"Int Mic", NULL, "Platform Clock"},
 140         {"Ext Spk", NULL, "Platform Clock"},
 141 };
 142
 143 static const struct snd_kcontrol_new cht_mc_controls[] = {
 144         SOC_DAPM_PIN_SWITCH("Headphone"),
 145         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 146         SOC_DAPM_PIN_SWITCH("Int Mic"),
 147         SOC_DAPM_PIN_SWITCH("Ext Spk"),
 148 };
 149
 150 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 151                                         struct snd_pcm_hw_params *params)
 152 {
 153         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 154         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 155         int ret;
 156
 157         /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 158         ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 159                                   CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 160         if (ret < 0) {
 161                 dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 162                 return ret;
 163         }
 164
 165         /* set codec sysclk source to PLL */
 166         ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 167                                      params_rate(params) * 512,
 168                                      SND_SOC_CLOCK_IN);
 169         if (ret < 0) {
 170                 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 171                 return ret;
 172         }
 173         return 0;
 174 }
 175
 176 static const struct acpi_gpio_params headset_gpios = { 0, 0, false };
 177
 178 static const struct acpi_gpio_mapping cht_rt5672_gpios[] = {
 179         { "headset-gpios", &headset_gpios, 1 },
 180         {},
 181 };
 182
 183 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 184 {
 185         int ret;
 186         struct snd_soc_dai *codec_dai = runtime->codec_dai;
 187         struct snd_soc_component *component = codec_dai->component;
 188         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
 189
 190         if (devm_acpi_dev_add_driver_gpios(component->dev, cht_rt5672_gpios))
 191                 dev_warn(runtime->dev, "Unable to add GPIO mapping table\n");
 192
 193         /* Select codec ASRC clock source to track I2S1 clock, because codec
 194          * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
 195          * be supported by RT5672. Otherwise, ASRC will be disabled and cause
 196          * noise.
 197          */
 198         rt5670_sel_asrc_clk_src(component,
 199                                 RT5670_DA_STEREO_FILTER
 200                                 | RT5670_DA_MONO_L_FILTER
 201                                 | RT5670_DA_MONO_R_FILTER
 202                                 | RT5670_AD_STEREO_FILTER
 203                                 | RT5670_AD_MONO_L_FILTER
 204                                 | RT5670_AD_MONO_R_FILTER,
 205                                 RT5670_CLK_SEL_I2S1_ASRC);
 206
 207         ret = snd_soc_card_jack_new(runtime->card, "Headset",
 208                                     SND_JACK_HEADSET | SND_JACK_BTN_0 |
 209                                     SND_JACK_BTN_1 | SND_JACK_BTN_2,
 210                                     &ctx->headset,
 211                                     cht_bsw_headset_pins,
 212                                     ARRAY_SIZE(cht_bsw_headset_pins));
 213         if (ret)
 214                 return ret;
 215
 216         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
 217         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_1, KEY_VOLUMEUP);
 218         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN);
 219
 220         rt5670_set_jack_detect(component, &ctx->headset);
 221         if (ctx->mclk) {
 222                 /*
 223                  * The firmware might enable the clock at
 224                  * boot (this information may or may not
 225                  * be reflected in the enable clock register).
 226                  * To change the rate we must disable the clock
 227                  * first to cover these cases. Due to common
 228                  * clock framework restrictions that do not allow
 229                  * to disable a clock that has not been enabled,
 230                  * we need to enable the clock first.
 231                  */
 232                 ret = clk_prepare_enable(ctx->mclk);
 233                 if (!ret)
 234                         clk_disable_unprepare(ctx->mclk);
 235
 236                 ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);
 237
 238                 if (ret) {
 239                         dev_err(runtime->dev, "unable to set MCLK rate\n");
 240                         return ret;
 241                 }
 242         }
 243         return 0;
 244 }
 245
 246 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 247                             struct snd_pcm_hw_params *params)
 248 {
 249         struct snd_interval *rate = hw_param_interval(params,
 250                         SNDRV_PCM_HW_PARAM_RATE);
 251         struct snd_interval *channels = hw_param_interval(params,
 252                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 253         int ret;
 254
 255         /* The DSP will covert the FE rate to 48k, stereo, 24bits */
 256         rate->min = rate->max = 48000;
 257         channels->min = channels->max = 2;
 258
 259         /* set SSP2 to 24-bit */
 260         params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
 261
 262         /*
 263          * Default mode for SSP configuration is TDM 4 slot
 264          */
 265         ret = snd_soc_dai_set_fmt(rtd->codec_dai,
 266                                   SND_SOC_DAIFMT_DSP_B |
 267                                   SND_SOC_DAIFMT_IB_NF |
 268                                   SND_SOC_DAIFMT_CBS_CFS);
 269         if (ret < 0) {
 270                 dev_err(rtd->dev, "can't set format to TDM %d\n", ret);
 271                 return ret;
 272         }
 273
 274         /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 275         ret = snd_soc_dai_set_tdm_slot(rtd->codec_dai, 0xF, 0xF, 4, 24);
 276         if (ret < 0) {
 277                 dev_err(rtd->dev, "can't set codec TDM slot %d\n", ret);
 278                 return ret;
 279         }
 280
 281         return 0;
 282 }
 283
 284 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 285 {
 286         return snd_pcm_hw_constraint_single(substream->runtime,
 287                         SNDRV_PCM_HW_PARAM_RATE, 48000);
 288 }
 289
 290 static const struct snd_soc_ops cht_aif1_ops = {
 291         .startup = cht_aif1_startup,
 292 };
 293
 294 static const struct snd_soc_ops cht_be_ssp2_ops = {
 295         .hw_params = cht_aif1_hw_params,
 296 };
 297
 298 static struct snd_soc_dai_link cht_dailink[] = {
 299         /* Front End DAI links */
 300         [MERR_DPCM_AUDIO] = {
 301                 .name = "Audio Port",
 302                 .stream_name = "Audio",
 303                 .cpu_dai_name = "media-cpu-dai",
 304                 .codec_dai_name = "snd-soc-dummy-dai",
 305                 .codec_name = "snd-soc-dummy",
 306                 .platform_name = "sst-mfld-platform",
 307                 .nonatomic = true,
 308                 .dynamic = 1,
 309                 .dpcm_playback = 1,
 310                 .dpcm_capture = 1,
 311                 .ops = &cht_aif1_ops,
 312         },
 313         [MERR_DPCM_DEEP_BUFFER] = {
 314                 .name = "Deep-Buffer Audio Port",
 315                 .stream_name = "Deep-Buffer Audio",
 316                 .cpu_dai_name = "deepbuffer-cpu-dai",
 317                 .codec_dai_name = "snd-soc-dummy-dai",
 318                 .codec_name = "snd-soc-dummy",
 319                 .platform_name = "sst-mfld-platform",
 320                 .nonatomic = true,
 321                 .dynamic = 1,
 322                 .dpcm_playback = 1,
 323                 .ops = &cht_aif1_ops,
 324         },
 325
 326         /* Back End DAI links */
 327         {
 328                 /* SSP2 - Codec */
 329                 .name = "SSP2-Codec",
 330                 .id = 0,
 331                 .cpu_dai_name = "ssp2-port",
 332                 .platform_name = "sst-mfld-platform",
 333                 .no_pcm = 1,
 334                 .nonatomic = true,
 335                 .codec_dai_name = "rt5670-aif1",
 336                 .codec_name = "i2c-10EC5670:00",
 337                 .init = cht_codec_init,
 338                 .be_hw_params_fixup = cht_codec_fixup,
 339                 .dpcm_playback = 1,
 340                 .dpcm_capture = 1,
 341                 .ops = &cht_be_ssp2_ops,
 342         },
 343 };
 344
 345 static int cht_suspend_pre(struct snd_soc_card *card)
 346 {
 347         struct snd_soc_component *component;
 348         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
 349
 350         for_each_card_components(card, component) {
 351                 if (!strncmp(component->name,
 352                              ctx->codec_name, sizeof(ctx->codec_name))) {
 353
 354                         dev_dbg(component->dev, "disabling jack detect before going to suspend.\n");
 355                         rt5670_jack_suspend(component);
 356                         break;
 357                 }
 358         }
 359         return 0;
 360 }
 361
 362 static int cht_resume_post(struct snd_soc_card *card)
 363 {
 364         struct snd_soc_component *component;
 365         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
 366
 367         for_each_card_components(card, component) {
 368                 if (!strncmp(component->name,
 369                              ctx->codec_name, sizeof(ctx->codec_name))) {
 370
 371                         dev_dbg(component->dev, "enabling jack detect for resume.\n");
 372                         rt5670_jack_resume(component);
 373                         break;
 374                 }
 375         }
 376
 377         return 0;
 378 }
 379
 380 /* SoC card */
 381 static struct snd_soc_card snd_soc_card_cht = {
 382         .name = "cht-bsw-rt5672",
 383         .owner = THIS_MODULE,
 384         .dai_link = cht_dailink,
 385         .num_links = ARRAY_SIZE(cht_dailink),
 386         .dapm_widgets = cht_dapm_widgets,
 387         .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 388         .dapm_routes = cht_audio_map,
 389         .num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 390         .controls = cht_mc_controls,
 391         .num_controls = ARRAY_SIZE(cht_mc_controls),
 392         .suspend_pre = cht_suspend_pre,
 393         .resume_post = cht_resume_post,
 394 };
 395
 396 #define RT5672_I2C_DEFAULT      "i2c-10EC5670:00"
 397
 398 static int snd_cht_mc_probe(struct platform_device *pdev)
 399 {
 400         int ret_val = 0;
 401         struct cht_mc_private *drv;
 402         struct snd_soc_acpi_mach *mach = pdev->dev.platform_data;
 403         const char *platform_name;
 404         struct acpi_device *adev;
 405         int i;
 406
 407         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 408         if (!drv)
 409                 return -ENOMEM;
 410
 411         strcpy(drv->codec_name, RT5672_I2C_DEFAULT);
 412
 413         /* fixup codec name based on HID */
 414         adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
 415         if (adev) {
 416                 snprintf(drv->codec_name, sizeof(drv->codec_name),
 417                          "i2c-%s", acpi_dev_name(adev));
 418                 put_device(&adev->dev);
 419                 for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
 420                         if (!strcmp(cht_dailink[i].codec_name,
 421                                 RT5672_I2C_DEFAULT)) {
 422                                 cht_dailink[i].codec_name = drv->codec_name;
 423                                 break;
 424                         }
 425                 }
 426         }
 427
 428         /* override plaform name, if required */
 429         snd_soc_card_cht.dev = &pdev->dev;
 430         platform_name = mach->mach_params.platform;
 431
 432         ret_val = snd_soc_fixup_dai_links_platform_name(&snd_soc_card_cht,
 433                                                         platform_name);
 434         if (ret_val)
 435                 return ret_val;
 436
 437         drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
 438         if (IS_ERR(drv->mclk)) {
 439                 dev_err(&pdev->dev,
 440                         "Failed to get MCLK from pmc_plt_clk_3: %ld\n",
 441                         PTR_ERR(drv->mclk));
 442                 return PTR_ERR(drv->mclk);
 443         }
 444         snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
 445
 446         /* register the soc card */
 447         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 448         if (ret_val) {
 449                 dev_err(&pdev->dev,
 450                         "snd_soc_register_card failed %d\n", ret_val);
 451                 return ret_val;
 452         }
 453         platform_set_drvdata(pdev, &snd_soc_card_cht);
 454         return ret_val;
 455 }
 456
 457 static struct platform_driver snd_cht_mc_driver = {
 458         .driver = {
 459                 .name = "cht-bsw-rt5672",
 460         },
 461         .probe = snd_cht_mc_probe,
 462 };
 463
 464 module_platform_driver(snd_cht_mc_driver);
 465
 466 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 467 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 468 MODULE_LICENSE("GPL v2");
 469 MODULE_ALIAS("platform:cht-bsw-rt5672");