sound/soc/codecs/wm8776.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * wm8776.c  --  WM8776 ALSA SoC Audio driver
   4  *
   5  * Copyright 2009-12 Wolfson Microelectronics plc
   6  *
   7  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   8  *
   9  * TODO: Input ALC/limiter support
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/moduleparam.h>
  14 #include <linux/init.h>
  15 #include <linux/delay.h>
  16 #include <linux/pm.h>
  17 #include <linux/i2c.h>
  18 #include <linux/of_device.h>
  19 #include <linux/regmap.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/slab.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/initval.h>
  27 #include <sound/tlv.h>
  28
  29 #include "wm8776.h"
  30
  31 enum wm8776_chip_type {
  32         WM8775 = 1,
  33         WM8776,
  34 };
  35
  36 /* codec private data */
  37 struct wm8776_priv {
  38         struct regmap *regmap;
  39         int sysclk[2];
  40 };
  41
  42 static const struct reg_default wm8776_reg_defaults[] = {
  43         {  0, 0x79 },
  44         {  1, 0x79 },
  45         {  2, 0x79 },
  46         {  3, 0xff },
  47         {  4, 0xff },
  48         {  5, 0xff },
  49         {  6, 0x00 },
  50         {  7, 0x90 },
  51         {  8, 0x00 },
  52         {  9, 0x00 },
  53         { 10, 0x22 },
  54         { 11, 0x22 },
  55         { 12, 0x22 },
  56         { 13, 0x08 },
  57         { 14, 0xcf },
  58         { 15, 0xcf },
  59         { 16, 0x7b },
  60         { 17, 0x00 },
  61         { 18, 0x32 },
  62         { 19, 0x00 },
  63         { 20, 0xa6 },
  64         { 21, 0x01 },
  65         { 22, 0x01 },
  66 };
  67
  68 static bool wm8776_volatile(struct device *dev, unsigned int reg)
  69 {
  70         switch (reg) {
  71         case WM8776_RESET:
  72                 return true;
  73         default:
  74                 return false;
  75         }
  76 }
  77
  78 static int wm8776_reset(struct snd_soc_component *component)
  79 {
  80         return snd_soc_component_write(component, WM8776_RESET, 0);
  81 }
  82
  83 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  84 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  85 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  86
  87 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  88 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  89                  0, 127, 0, hp_tlv),
  90 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  91                  0, 255, 0, dac_tlv),
  92 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  93
  94 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  95
  96 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  97                  0, 255, 0, adc_tlv),
  98 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  99 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
 100 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
 101 };
 102
 103 static const struct snd_kcontrol_new inmix_controls[] = {
 104 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
 105 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
 106 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
 107 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
 108 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
 109 };
 110
 111 static const struct snd_kcontrol_new outmix_controls[] = {
 112 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
 113 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
 114 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
 115 };
 116
 117 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
 118 SND_SOC_DAPM_INPUT("AUX"),
 119
 120 SND_SOC_DAPM_INPUT("AIN1"),
 121 SND_SOC_DAPM_INPUT("AIN2"),
 122 SND_SOC_DAPM_INPUT("AIN3"),
 123 SND_SOC_DAPM_INPUT("AIN4"),
 124 SND_SOC_DAPM_INPUT("AIN5"),
 125
 126 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
 127                    inmix_controls, ARRAY_SIZE(inmix_controls)),
 128
 129 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 130 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 131
 132 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 133                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 134
 135 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 136
 137 SND_SOC_DAPM_OUTPUT("VOUT"),
 138
 139 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 140 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 141 };
 142
 143 static const struct snd_soc_dapm_route routes[] = {
 144         { "Input Mixer", "AIN1 Switch", "AIN1" },
 145         { "Input Mixer", "AIN2 Switch", "AIN2" },
 146         { "Input Mixer", "AIN3 Switch", "AIN3" },
 147         { "Input Mixer", "AIN4 Switch", "AIN4" },
 148         { "Input Mixer", "AIN5 Switch", "AIN5" },
 149
 150         { "ADC", NULL, "Input Mixer" },
 151
 152         { "Output Mixer", "DAC Switch", "DAC" },
 153         { "Output Mixer", "AUX Switch", "AUX" },
 154         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 155
 156         { "VOUT", NULL, "Output Mixer" },
 157
 158         { "Headphone PGA", NULL, "Output Mixer" },
 159
 160         { "HPOUTL", NULL, "Headphone PGA" },
 161         { "HPOUTR", NULL, "Headphone PGA" },
 162 };
 163
 164 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 165 {
 166         struct snd_soc_component *component = dai->component;
 167         int reg, iface, master;
 168
 169         switch (dai->driver->id) {
 170         case WM8776_DAI_DAC:
 171                 reg = WM8776_DACIFCTRL;
 172                 master = 0x80;
 173                 break;
 174         case WM8776_DAI_ADC:
 175                 reg = WM8776_ADCIFCTRL;
 176                 master = 0x100;
 177                 break;
 178         default:
 179                 return -EINVAL;
 180         }
 181
 182         iface = 0;
 183
 184         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 185         case SND_SOC_DAIFMT_CBM_CFM:
 186                 break;
 187         case SND_SOC_DAIFMT_CBS_CFS:
 188                 master = 0;
 189                 break;
 190         default:
 191                 return -EINVAL;
 192         }
 193
 194         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 195         case SND_SOC_DAIFMT_I2S:
 196                 iface |= 0x0002;
 197                 break;
 198         case SND_SOC_DAIFMT_RIGHT_J:
 199                 break;
 200         case SND_SOC_DAIFMT_LEFT_J:
 201                 iface |= 0x0001;
 202                 break;
 203         default:
 204                 return -EINVAL;
 205         }
 206
 207         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 208         case SND_SOC_DAIFMT_NB_NF:
 209                 break;
 210         case SND_SOC_DAIFMT_IB_IF:
 211                 iface |= 0x00c;
 212                 break;
 213         case SND_SOC_DAIFMT_IB_NF:
 214                 iface |= 0x008;
 215                 break;
 216         case SND_SOC_DAIFMT_NB_IF:
 217                 iface |= 0x004;
 218                 break;
 219         default:
 220                 return -EINVAL;
 221         }
 222
 223         /* Finally, write out the values */
 224         snd_soc_component_update_bits(component, reg, 0xf, iface);
 225         snd_soc_component_update_bits(component, WM8776_MSTRCTRL, 0x180, master);
 226
 227         return 0;
 228 }
 229
 230 static int mclk_ratios[] = {
 231         128,
 232         192,
 233         256,
 234         384,
 235         512,
 236         768,
 237 };
 238
 239 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 240                             struct snd_pcm_hw_params *params,
 241                             struct snd_soc_dai *dai)
 242 {
 243         struct snd_soc_component *component = dai->component;
 244         struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
 245         int iface_reg, iface;
 246         int ratio_shift, master;
 247         int i;
 248
 249         switch (dai->driver->id) {
 250         case WM8776_DAI_DAC:
 251                 iface_reg = WM8776_DACIFCTRL;
 252                 master = 0x80;
 253                 ratio_shift = 4;
 254                 break;
 255         case WM8776_DAI_ADC:
 256                 iface_reg = WM8776_ADCIFCTRL;
 257                 master = 0x100;
 258                 ratio_shift = 0;
 259                 break;
 260         default:
 261                 return -EINVAL;
 262         }
 263
 264         /* Set word length */
 265         switch (params_width(params)) {
 266         case 16:
 267                 iface = 0;
 268                 break;
 269         case 20:
 270                 iface = 0x10;
 271                 break;
 272         case 24:
 273                 iface = 0x20;
 274                 break;
 275         case 32:
 276                 iface = 0x30;
 277                 break;
 278         default:
 279                 dev_err(component->dev, "Unsupported sample size: %i\n",
 280                         params_width(params));
 281                 return -EINVAL;
 282         }
 283
 284         /* Only need to set MCLK/LRCLK ratio if we're master */
 285         if (snd_soc_component_read32(component, WM8776_MSTRCTRL) & master) {
 286                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 287                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 288                             == mclk_ratios[i])
 289                                 break;
 290                 }
 291
 292                 if (i == ARRAY_SIZE(mclk_ratios)) {
 293                         dev_err(component->dev,
 294                                 "Unable to configure MCLK ratio %d/%d\n",
 295                                 wm8776->sysclk[dai->driver->id], params_rate(params));
 296                         return -EINVAL;
 297                 }
 298
 299                 dev_dbg(component->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 300
 301                 snd_soc_component_update_bits(component, WM8776_MSTRCTRL,
 302                                     0x7 << ratio_shift, i << ratio_shift);
 303         } else {
 304                 dev_dbg(component->dev, "DAI in slave mode\n");
 305         }
 306
 307         snd_soc_component_update_bits(component, iface_reg, 0x30, iface);
 308
 309         return 0;
 310 }
 311
 312 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 313 {
 314         struct snd_soc_component *component = dai->component;
 315
 316         return snd_soc_component_write(component, WM8776_DACMUTE, !!mute);
 317 }
 318
 319 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 320                              int clk_id, unsigned int freq, int dir)
 321 {
 322         struct snd_soc_component *component = dai->component;
 323         struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
 324
 325         if (WARN_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk)))
 326                 return -EINVAL;
 327
 328         wm8776->sysclk[dai->driver->id] = freq;
 329
 330         return 0;
 331 }
 332
 333 static int wm8776_set_bias_level(struct snd_soc_component *component,
 334                                  enum snd_soc_bias_level level)
 335 {
 336         struct wm8776_priv *wm8776 = snd_soc_component_get_drvdata(component);
 337
 338         switch (level) {
 339         case SND_SOC_BIAS_ON:
 340                 break;
 341         case SND_SOC_BIAS_PREPARE:
 342                 break;
 343         case SND_SOC_BIAS_STANDBY:
 344                 if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) {
 345                         regcache_sync(wm8776->regmap);
 346
 347                         /* Disable the global powerdown; DAPM does the rest */
 348                         snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 0);
 349                 }
 350
 351                 break;
 352         case SND_SOC_BIAS_OFF:
 353                 snd_soc_component_update_bits(component, WM8776_PWRDOWN, 1, 1);
 354                 break;
 355         }
 356
 357         return 0;
 358 }
 359
 360 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 361                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 362
 363 static const struct snd_soc_dai_ops wm8776_dac_ops = {
 364         .digital_mute   = wm8776_mute,
 365         .hw_params      = wm8776_hw_params,
 366         .set_fmt        = wm8776_set_fmt,
 367         .set_sysclk     = wm8776_set_sysclk,
 368 };
 369
 370 static const struct snd_soc_dai_ops wm8776_adc_ops = {
 371         .hw_params      = wm8776_hw_params,
 372         .set_fmt        = wm8776_set_fmt,
 373         .set_sysclk     = wm8776_set_sysclk,
 374 };
 375
 376 static struct snd_soc_dai_driver wm8776_dai[] = {
 377         {
 378                 .name = "wm8776-hifi-playback",
 379                 .id     = WM8776_DAI_DAC,
 380                 .playback = {
 381                         .stream_name = "Playback",
 382                         .channels_min = 2,
 383                         .channels_max = 2,
 384                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
 385                         .rate_min = 32000,
 386                         .rate_max = 192000,
 387                         .formats = WM8776_FORMATS,
 388                 },
 389                 .ops = &wm8776_dac_ops,
 390         },
 391         {
 392                 .name = "wm8776-hifi-capture",
 393                 .id     = WM8776_DAI_ADC,
 394                 .capture = {
 395                         .stream_name = "Capture",
 396                         .channels_min = 2,
 397                         .channels_max = 2,
 398                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
 399                         .rate_min = 32000,
 400                         .rate_max = 96000,
 401                         .formats = WM8776_FORMATS,
 402                 },
 403                 .ops = &wm8776_adc_ops,
 404         },
 405 };
 406
 407 static int wm8776_probe(struct snd_soc_component *component)
 408 {
 409         int ret = 0;
 410
 411         ret = wm8776_reset(component);
 412         if (ret < 0) {
 413                 dev_err(component->dev, "Failed to issue reset: %d\n", ret);
 414                 return ret;
 415         }
 416
 417         /* Latch the update bits; right channel only since we always
 418          * update both. */
 419         snd_soc_component_update_bits(component, WM8776_HPRVOL, 0x100, 0x100);
 420         snd_soc_component_update_bits(component, WM8776_DACRVOL, 0x100, 0x100);
 421
 422         return ret;
 423 }
 424
 425 static const struct snd_soc_component_driver soc_component_dev_wm8776 = {
 426         .probe                  = wm8776_probe,
 427         .set_bias_level         = wm8776_set_bias_level,
 428         .controls               = wm8776_snd_controls,
 429         .num_controls           = ARRAY_SIZE(wm8776_snd_controls),
 430         .dapm_widgets           = wm8776_dapm_widgets,
 431         .num_dapm_widgets       = ARRAY_SIZE(wm8776_dapm_widgets),
 432         .dapm_routes            = routes,
 433         .num_dapm_routes        = ARRAY_SIZE(routes),
 434         .suspend_bias_off       = 1,
 435         .idle_bias_on           = 1,
 436         .use_pmdown_time        = 1,
 437         .endianness             = 1,
 438         .non_legacy_dai_naming  = 1,
 439 };
 440
 441 static const struct of_device_id wm8776_of_match[] = {
 442         { .compatible = "wlf,wm8776", },
 443         { }
 444 };
 445 MODULE_DEVICE_TABLE(of, wm8776_of_match);
 446
 447 static const struct regmap_config wm8776_regmap = {
 448         .reg_bits = 7,
 449         .val_bits = 9,
 450         .max_register = WM8776_RESET,
 451
 452         .reg_defaults = wm8776_reg_defaults,
 453         .num_reg_defaults = ARRAY_SIZE(wm8776_reg_defaults),
 454         .cache_type = REGCACHE_RBTREE,
 455
 456         .volatile_reg = wm8776_volatile,
 457 };
 458
 459 #if defined(CONFIG_SPI_MASTER)
 460 static int wm8776_spi_probe(struct spi_device *spi)
 461 {
 462         struct wm8776_priv *wm8776;
 463         int ret;
 464
 465         wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
 466                               GFP_KERNEL);
 467         if (wm8776 == NULL)
 468                 return -ENOMEM;
 469
 470         wm8776->regmap = devm_regmap_init_spi(spi, &wm8776_regmap);
 471         if (IS_ERR(wm8776->regmap))
 472                 return PTR_ERR(wm8776->regmap);
 473
 474         spi_set_drvdata(spi, wm8776);
 475
 476         ret = devm_snd_soc_register_component(&spi->dev,
 477                         &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 478
 479         return ret;
 480 }
 481
 482 static struct spi_driver wm8776_spi_driver = {
 483         .driver = {
 484                 .name   = "wm8776",
 485                 .of_match_table = wm8776_of_match,
 486         },
 487         .probe          = wm8776_spi_probe,
 488 };
 489 #endif /* CONFIG_SPI_MASTER */
 490
 491 #if IS_ENABLED(CONFIG_I2C)
 492 static int wm8776_i2c_probe(struct i2c_client *i2c,
 493                             const struct i2c_device_id *id)
 494 {
 495         struct wm8776_priv *wm8776;
 496         int ret;
 497
 498         wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
 499                               GFP_KERNEL);
 500         if (wm8776 == NULL)
 501                 return -ENOMEM;
 502
 503         wm8776->regmap = devm_regmap_init_i2c(i2c, &wm8776_regmap);
 504         if (IS_ERR(wm8776->regmap))
 505                 return PTR_ERR(wm8776->regmap);
 506
 507         i2c_set_clientdata(i2c, wm8776);
 508
 509         ret = devm_snd_soc_register_component(&i2c->dev,
 510                         &soc_component_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 511
 512         return ret;
 513 }
 514
 515 static const struct i2c_device_id wm8776_i2c_id[] = {
 516         { "wm8775", WM8775 },
 517         { "wm8776", WM8776 },
 518         { }
 519 };
 520 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 521
 522 static struct i2c_driver wm8776_i2c_driver = {
 523         .driver = {
 524                 .name = "wm8776",
 525                 .of_match_table = wm8776_of_match,
 526         },
 527         .probe =    wm8776_i2c_probe,
 528         .id_table = wm8776_i2c_id,
 529 };
 530 #endif
 531
 532 static int __init wm8776_modinit(void)
 533 {
 534         int ret = 0;
 535 #if IS_ENABLED(CONFIG_I2C)
 536         ret = i2c_add_driver(&wm8776_i2c_driver);
 537         if (ret != 0) {
 538                 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
 539                        ret);
 540         }
 541 #endif
 542 #if defined(CONFIG_SPI_MASTER)
 543         ret = spi_register_driver(&wm8776_spi_driver);
 544         if (ret != 0) {
 545                 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
 546                        ret);
 547         }
 548 #endif
 549         return ret;
 550 }
 551 module_init(wm8776_modinit);
 552
 553 static void __exit wm8776_exit(void)
 554 {
 555 #if IS_ENABLED(CONFIG_I2C)
 556         i2c_del_driver(&wm8776_i2c_driver);
 557 #endif
 558 #if defined(CONFIG_SPI_MASTER)
 559         spi_unregister_driver(&wm8776_spi_driver);
 560 #endif
 561 }
 562 module_exit(wm8776_exit);
 563
 564 MODULE_DESCRIPTION("ASoC WM8776 driver");
 565 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 566 MODULE_LICENSE("GPL");