root/sound/soc/intel/boards/cht_bsw_rt5672.c

DEFINITIONS

1. platform_clock_control
2. cht_aif1_hw_params
3. cht_codec_init
4. cht_codec_fixup
5. cht_aif1_startup
6. cht_suspend_pre
7. cht_resume_post
8. snd_cht_mc_probe

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms
   4  *                     Cherrytrail and Braswell, with RT5672 codec.
   5  *
   6  *  Copyright (C) 2014 Intel Corp
   7  *  Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
   8  *          Mengdong Lin <mengdong.lin@intel.com>
   9  */
  10 
  11 #include <linux/gpio/consumer.h>
  12 #include <linux/input.h>
  13 #include <linux/module.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/slab.h>
  16 #include <linux/clk.h>
  17 #include <sound/pcm.h>
  18 #include <sound/pcm_params.h>
  19 #include <sound/soc.h>
  20 #include <sound/jack.h>
  21 #include <sound/soc-acpi.h>
  22 #include "../../codecs/rt5670.h"
  23 #include "../atom/sst-atom-controls.h"
  24 
  25 
  26 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
  27 #define CHT_PLAT_CLK_3_HZ       19200000
  28 #define CHT_CODEC_DAI   "rt5670-aif1"
  29 
  30 struct cht_mc_private {
  31         struct snd_soc_jack headset;
  32         char codec_name[SND_ACPI_I2C_ID_LEN];
  33         struct clk *mclk;
  34 };
  35 
  36 /* Headset jack detection DAPM pins */
  37 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = {
  38         {
  39                 .pin = "Headset Mic",
  40                 .mask = SND_JACK_MICROPHONE,
  41         },
  42         {
  43                 .pin = "Headphone",
  44                 .mask = SND_JACK_HEADPHONE,
  45         },
  46 };
  47 
  48 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  49                 struct snd_kcontrol *k, int  event)
  50 {
  51         struct snd_soc_dapm_context *dapm = w->dapm;
  52         struct snd_soc_card *card = dapm->card;
  53         struct snd_soc_dai *codec_dai;
  54         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
  55         int ret;
  56 
  57         codec_dai = snd_soc_card_get_codec_dai(card, CHT_CODEC_DAI);
  58         if (!codec_dai) {
  59                 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
  60                 return -EIO;
  61         }
  62 
  63         if (SND_SOC_DAPM_EVENT_ON(event)) {
  64                 if (ctx->mclk) {
  65                         ret = clk_prepare_enable(ctx->mclk);
  66                         if (ret < 0) {
  67                                 dev_err(card->dev,
  68                                         "could not configure MCLK state");
  69                                 return ret;
  70                         }
  71                 }
  72 
  73                 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
  74                 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
  75                                 CHT_PLAT_CLK_3_HZ, 48000 * 512);
  76                 if (ret < 0) {
  77                         dev_err(card->dev, "can't set codec pll: %d\n", ret);
  78                         return ret;
  79                 }
  80 
  81                 /* set codec sysclk source to PLL */
  82                 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
  83                         48000 * 512, SND_SOC_CLOCK_IN);
  84                 if (ret < 0) {
  85                         dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
  86                         return ret;
  87                 }
  88         } else {
  89                 /* Set codec sysclk source to its internal clock because codec
  90                  * PLL will be off when idle and MCLK will also be off by ACPI
  91                  * when codec is runtime suspended. Codec needs clock for jack
  92                  * detection and button press.
  93                  */
  94                 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
  95                                        48000 * 512, SND_SOC_CLOCK_IN);
  96 
  97                 if (ctx->mclk)
  98                         clk_disable_unprepare(ctx->mclk);
  99         }
 100         return 0;
 101 }
 102 
 103 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
 104         SND_SOC_DAPM_HP("Headphone", NULL),
 105         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 106         SND_SOC_DAPM_MIC("Int Mic", NULL),
 107         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 108         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
 109                         platform_clock_control, SND_SOC_DAPM_PRE_PMU |
 110                         SND_SOC_DAPM_POST_PMD),
 111 };
 112 
 113 static const struct snd_soc_dapm_route cht_audio_map[] = {
 114         {"IN1P", NULL, "Headset Mic"},
 115         {"IN1N", NULL, "Headset Mic"},
 116         {"DMIC L1", NULL, "Int Mic"},
 117         {"DMIC R1", NULL, "Int Mic"},
 118         {"Headphone", NULL, "HPOL"},
 119         {"Headphone", NULL, "HPOR"},
 120         {"Ext Spk", NULL, "SPOLP"},
 121         {"Ext Spk", NULL, "SPOLN"},
 122         {"Ext Spk", NULL, "SPORP"},
 123         {"Ext Spk", NULL, "SPORN"},
 124         {"AIF1 Playback", NULL, "ssp2 Tx"},
 125         {"ssp2 Tx", NULL, "codec_out0"},
 126         {"ssp2 Tx", NULL, "codec_out1"},
 127         {"codec_in0", NULL, "ssp2 Rx"},
 128         {"codec_in1", NULL, "ssp2 Rx"},
 129         {"ssp2 Rx", NULL, "AIF1 Capture"},
 130         {"Headphone", NULL, "Platform Clock"},
 131         {"Headset Mic", NULL, "Platform Clock"},
 132         {"Int Mic", NULL, "Platform Clock"},
 133         {"Ext Spk", NULL, "Platform Clock"},
 134 };
 135 
 136 static const struct snd_kcontrol_new cht_mc_controls[] = {
 137         SOC_DAPM_PIN_SWITCH("Headphone"),
 138         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 139         SOC_DAPM_PIN_SWITCH("Int Mic"),
 140         SOC_DAPM_PIN_SWITCH("Ext Spk"),
 141 };
 142 
 143 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 144                                         struct snd_pcm_hw_params *params)
 145 {
 146         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 147         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 148         int ret;
 149 
 150         /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 151         ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 152                                   CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 153         if (ret < 0) {
 154                 dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 155                 return ret;
 156         }
 157 
 158         /* set codec sysclk source to PLL */
 159         ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 160                                      params_rate(params) * 512,
 161                                      SND_SOC_CLOCK_IN);
 162         if (ret < 0) {
 163                 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 164                 return ret;
 165         }
 166         return 0;
 167 }
 168 
 169 static const struct acpi_gpio_params headset_gpios = { 0, 0, false };
 170 
 171 static const struct acpi_gpio_mapping cht_rt5672_gpios[] = {
 172         { "headset-gpios", &headset_gpios, 1 },
 173         {},
 174 };
 175 
 176 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 177 {
 178         int ret;
 179         struct snd_soc_dai *codec_dai = runtime->codec_dai;
 180         struct snd_soc_component *component = codec_dai->component;
 181         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
 182 
 183         if (devm_acpi_dev_add_driver_gpios(component->dev, cht_rt5672_gpios))
 184                 dev_warn(runtime->dev, "Unable to add GPIO mapping table\n");
 185 
 186         /* Select codec ASRC clock source to track I2S1 clock, because codec
 187          * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
 188          * be supported by RT5672. Otherwise, ASRC will be disabled and cause
 189          * noise.
 190          */
 191         rt5670_sel_asrc_clk_src(component,
 192                                 RT5670_DA_STEREO_FILTER
 193                                 | RT5670_DA_MONO_L_FILTER
 194                                 | RT5670_DA_MONO_R_FILTER
 195                                 | RT5670_AD_STEREO_FILTER
 196                                 | RT5670_AD_MONO_L_FILTER
 197                                 | RT5670_AD_MONO_R_FILTER,
 198                                 RT5670_CLK_SEL_I2S1_ASRC);
 199 
 200         ret = snd_soc_card_jack_new(runtime->card, "Headset",
 201                                     SND_JACK_HEADSET | SND_JACK_BTN_0 |
 202                                     SND_JACK_BTN_1 | SND_JACK_BTN_2,
 203                                     &ctx->headset,
 204                                     cht_bsw_headset_pins,
 205                                     ARRAY_SIZE(cht_bsw_headset_pins));
 206         if (ret)
 207                 return ret;
 208 
 209         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_0, KEY_PLAYPAUSE);
 210         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_1, KEY_VOLUMEUP);
 211         snd_jack_set_key(ctx->headset.jack, SND_JACK_BTN_2, KEY_VOLUMEDOWN);
 212 
 213         rt5670_set_jack_detect(component, &ctx->headset);
 214         if (ctx->mclk) {
 215                 /*
 216                  * The firmware might enable the clock at
 217                  * boot (this information may or may not
 218                  * be reflected in the enable clock register).
 219                  * To change the rate we must disable the clock
 220                  * first to cover these cases. Due to common
 221                  * clock framework restrictions that do not allow
 222                  * to disable a clock that has not been enabled,
 223                  * we need to enable the clock first.
 224                  */
 225                 ret = clk_prepare_enable(ctx->mclk);
 226                 if (!ret)
 227                         clk_disable_unprepare(ctx->mclk);
 228 
 229                 ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ);
 230 
 231                 if (ret) {
 232                         dev_err(runtime->dev, "unable to set MCLK rate\n");
 233                         return ret;
 234                 }
 235         }
 236         return 0;
 237 }
 238 
 239 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 240                             struct snd_pcm_hw_params *params)
 241 {
 242         struct snd_interval *rate = hw_param_interval(params,
 243                         SNDRV_PCM_HW_PARAM_RATE);
 244         struct snd_interval *channels = hw_param_interval(params,
 245                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 246         int ret;
 247 
 248         /* The DSP will covert the FE rate to 48k, stereo, 24bits */
 249         rate->min = rate->max = 48000;
 250         channels->min = channels->max = 2;
 251 
 252         /* set SSP2 to 24-bit */
 253         params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
 254 
 255         /*
 256          * Default mode for SSP configuration is TDM 4 slot
 257          */
 258         ret = snd_soc_dai_set_fmt(rtd->codec_dai,
 259                                   SND_SOC_DAIFMT_DSP_B |
 260                                   SND_SOC_DAIFMT_IB_NF |
 261                                   SND_SOC_DAIFMT_CBS_CFS);
 262         if (ret < 0) {
 263                 dev_err(rtd->dev, "can't set format to TDM %d\n", ret);
 264                 return ret;
 265         }
 266 
 267         /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 268         ret = snd_soc_dai_set_tdm_slot(rtd->codec_dai, 0xF, 0xF, 4, 24);
 269         if (ret < 0) {
 270                 dev_err(rtd->dev, "can't set codec TDM slot %d\n", ret);
 271                 return ret;
 272         }
 273 
 274         return 0;
 275 }
 276 
 277 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 278 {
 279         return snd_pcm_hw_constraint_single(substream->runtime,
 280                         SNDRV_PCM_HW_PARAM_RATE, 48000);
 281 }
 282 
 283 static const struct snd_soc_ops cht_aif1_ops = {
 284         .startup = cht_aif1_startup,
 285 };
 286 
 287 static const struct snd_soc_ops cht_be_ssp2_ops = {
 288         .hw_params = cht_aif1_hw_params,
 289 };
 290 
 291 SND_SOC_DAILINK_DEF(dummy,
 292         DAILINK_COMP_ARRAY(COMP_DUMMY()));
 293 
 294 SND_SOC_DAILINK_DEF(media,
 295         DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
 296 
 297 SND_SOC_DAILINK_DEF(deepbuffer,
 298         DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
 299 
 300 SND_SOC_DAILINK_DEF(ssp2_port,
 301         DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
 302 SND_SOC_DAILINK_DEF(ssp2_codec,
 303         DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10EC5670:00",
 304                                       "rt5670-aif1")));
 305 
 306 SND_SOC_DAILINK_DEF(platform,
 307         DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
 308 
 309 static struct snd_soc_dai_link cht_dailink[] = {
 310         /* Front End DAI links */
 311         [MERR_DPCM_AUDIO] = {
 312                 .name = "Audio Port",
 313                 .stream_name = "Audio",
 314                 .nonatomic = true,
 315                 .dynamic = 1,
 316                 .dpcm_playback = 1,
 317                 .dpcm_capture = 1,
 318                 .ops = &cht_aif1_ops,
 319                 SND_SOC_DAILINK_REG(media, dummy, platform),
 320         },
 321         [MERR_DPCM_DEEP_BUFFER] = {
 322                 .name = "Deep-Buffer Audio Port",
 323                 .stream_name = "Deep-Buffer Audio",
 324                 .nonatomic = true,
 325                 .dynamic = 1,
 326                 .dpcm_playback = 1,
 327                 .ops = &cht_aif1_ops,
 328                 SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
 329         },
 330 
 331         /* Back End DAI links */
 332         {
 333                 /* SSP2 - Codec */
 334                 .name = "SSP2-Codec",
 335                 .id = 0,
 336                 .no_pcm = 1,
 337                 .nonatomic = true,
 338                 .init = cht_codec_init,
 339                 .be_hw_params_fixup = cht_codec_fixup,
 340                 .dpcm_playback = 1,
 341                 .dpcm_capture = 1,
 342                 .ops = &cht_be_ssp2_ops,
 343                 SND_SOC_DAILINK_REG(ssp2_port, ssp2_codec, platform),
 344         },
 345 };
 346 
 347 static int cht_suspend_pre(struct snd_soc_card *card)
 348 {
 349         struct snd_soc_component *component;
 350         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
 351 
 352         for_each_card_components(card, component) {
 353                 if (!strncmp(component->name,
 354                              ctx->codec_name, sizeof(ctx->codec_name))) {
 355 
 356                         dev_dbg(component->dev, "disabling jack detect before going to suspend.\n");
 357                         rt5670_jack_suspend(component);
 358                         break;
 359                 }
 360         }
 361         return 0;
 362 }
 363 
 364 static int cht_resume_post(struct snd_soc_card *card)
 365 {
 366         struct snd_soc_component *component;
 367         struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card);
 368 
 369         for_each_card_components(card, component) {
 370                 if (!strncmp(component->name,
 371                              ctx->codec_name, sizeof(ctx->codec_name))) {
 372 
 373                         dev_dbg(component->dev, "enabling jack detect for resume.\n");
 374                         rt5670_jack_resume(component);
 375                         break;
 376                 }
 377         }
 378 
 379         return 0;
 380 }
 381 
 382 /* SoC card */
 383 static struct snd_soc_card snd_soc_card_cht = {
 384         .name = "cht-bsw-rt5672",
 385         .owner = THIS_MODULE,
 386         .dai_link = cht_dailink,
 387         .num_links = ARRAY_SIZE(cht_dailink),
 388         .dapm_widgets = cht_dapm_widgets,
 389         .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 390         .dapm_routes = cht_audio_map,
 391         .num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 392         .controls = cht_mc_controls,
 393         .num_controls = ARRAY_SIZE(cht_mc_controls),
 394         .suspend_pre = cht_suspend_pre,
 395         .resume_post = cht_resume_post,
 396 };
 397 
 398 #define RT5672_I2C_DEFAULT      "i2c-10EC5670:00"
 399 
 400 static int snd_cht_mc_probe(struct platform_device *pdev)
 401 {
 402         int ret_val = 0;
 403         struct cht_mc_private *drv;
 404         struct snd_soc_acpi_mach *mach = pdev->dev.platform_data;
 405         const char *platform_name;
 406         struct acpi_device *adev;
 407         int i;
 408 
 409         drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_KERNEL);
 410         if (!drv)
 411                 return -ENOMEM;
 412 
 413         strcpy(drv->codec_name, RT5672_I2C_DEFAULT);
 414 
 415         /* fixup codec name based on HID */
 416         adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
 417         if (adev) {
 418                 snprintf(drv->codec_name, sizeof(drv->codec_name),
 419                          "i2c-%s", acpi_dev_name(adev));
 420                 put_device(&adev->dev);
 421                 for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) {
 422                         if (!strcmp(cht_dailink[i].codecs->name,
 423                                     RT5672_I2C_DEFAULT)) {
 424                                 cht_dailink[i].codecs->name = drv->codec_name;
 425                                 break;
 426                         }
 427                 }
 428         }
 429 
 430         /* override plaform name, if required */
 431         snd_soc_card_cht.dev = &pdev->dev;
 432         platform_name = mach->mach_params.platform;
 433 
 434         ret_val = snd_soc_fixup_dai_links_platform_name(&snd_soc_card_cht,
 435                                                         platform_name);
 436         if (ret_val)
 437                 return ret_val;
 438 
 439         drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3");
 440         if (IS_ERR(drv->mclk)) {
 441                 dev_err(&pdev->dev,
 442                         "Failed to get MCLK from pmc_plt_clk_3: %ld\n",
 443                         PTR_ERR(drv->mclk));
 444                 return PTR_ERR(drv->mclk);
 445         }
 446         snd_soc_card_set_drvdata(&snd_soc_card_cht, drv);
 447 
 448         /* register the soc card */
 449         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 450         if (ret_val) {
 451                 dev_err(&pdev->dev,
 452                         "snd_soc_register_card failed %d\n", ret_val);
 453                 return ret_val;
 454         }
 455         platform_set_drvdata(pdev, &snd_soc_card_cht);
 456         return ret_val;
 457 }
 458 
 459 static struct platform_driver snd_cht_mc_driver = {
 460         .driver = {
 461                 .name = "cht-bsw-rt5672",
 462         },
 463         .probe = snd_cht_mc_probe,
 464 };
 465 
 466 module_platform_driver(snd_cht_mc_driver);
 467 
 468 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 469 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 470 MODULE_LICENSE("GPL v2");
 471 MODULE_ALIAS("platform:cht-bsw-rt5672");