sound/soc/codecs/wm8776.c

   1 /*
   2  * wm8776.c  --  WM8776 ALSA SoC Audio driver
   3  *
   4  * Copyright 2009 Wolfson Microelectronics plc
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * TODO: Input ALC/limiter support
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/of_device.h>
  22 #include <linux/spi/spi.h>
  23 #include <linux/slab.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30
  31 #include "wm8776.h"
  32
  33 /* codec private data */
  34 struct wm8776_priv {
  35         enum snd_soc_control_type control_type;
  36         int sysclk[2];
  37 };
  38
  39 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
  40         0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
  41         0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
  42         0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
  43         0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
  44         0xa6, 0x01, 0x01
  45 };
  46
  47 static int wm8776_reset(struct snd_soc_codec *codec)
  48 {
  49         return snd_soc_write(codec, WM8776_RESET, 0);
  50 }
  51
  52 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  53 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  54 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  55
  56 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  57 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  58                  0, 127, 0, hp_tlv),
  59 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  60                  0, 255, 0, dac_tlv),
  61 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  62
  63 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  64
  65 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  66                  0, 255, 0, adc_tlv),
  67 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  68 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  69 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  70 };
  71
  72 static const struct snd_kcontrol_new inmix_controls[] = {
  73 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  74 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  75 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  76 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  77 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  78 };
  79
  80 static const struct snd_kcontrol_new outmix_controls[] = {
  81 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  82 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  83 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  84 };
  85
  86 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  87 SND_SOC_DAPM_INPUT("AUX"),
  88
  89 SND_SOC_DAPM_INPUT("AIN1"),
  90 SND_SOC_DAPM_INPUT("AIN2"),
  91 SND_SOC_DAPM_INPUT("AIN3"),
  92 SND_SOC_DAPM_INPUT("AIN4"),
  93 SND_SOC_DAPM_INPUT("AIN5"),
  94
  95 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
  96                    inmix_controls, ARRAY_SIZE(inmix_controls)),
  97
  98 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
  99 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 100
 101 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 102                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 103
 104 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 105
 106 SND_SOC_DAPM_OUTPUT("VOUT"),
 107
 108 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 109 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 110 };
 111
 112 static const struct snd_soc_dapm_route routes[] = {
 113         { "Input Mixer", "AIN1 Switch", "AIN1" },
 114         { "Input Mixer", "AIN2 Switch", "AIN2" },
 115         { "Input Mixer", "AIN3 Switch", "AIN3" },
 116         { "Input Mixer", "AIN4 Switch", "AIN4" },
 117         { "Input Mixer", "AIN5 Switch", "AIN5" },
 118
 119         { "ADC", NULL, "Input Mixer" },
 120
 121         { "Output Mixer", "DAC Switch", "DAC" },
 122         { "Output Mixer", "AUX Switch", "AUX" },
 123         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 124
 125         { "VOUT", NULL, "Output Mixer" },
 126
 127         { "Headphone PGA", NULL, "Output Mixer" },
 128
 129         { "HPOUTL", NULL, "Headphone PGA" },
 130         { "HPOUTR", NULL, "Headphone PGA" },
 131 };
 132
 133 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 134 {
 135         struct snd_soc_codec *codec = dai->codec;
 136         int reg, iface, master;
 137
 138         switch (dai->driver->id) {
 139         case WM8776_DAI_DAC:
 140                 reg = WM8776_DACIFCTRL;
 141                 master = 0x80;
 142                 break;
 143         case WM8776_DAI_ADC:
 144                 reg = WM8776_ADCIFCTRL;
 145                 master = 0x100;
 146                 break;
 147         default:
 148                 return -EINVAL;
 149         }
 150
 151         iface = 0;
 152
 153         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 154         case SND_SOC_DAIFMT_CBM_CFM:
 155                 break;
 156         case SND_SOC_DAIFMT_CBS_CFS:
 157                 master = 0;
 158                 break;
 159         default:
 160                 return -EINVAL;
 161         }
 162
 163         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 164         case SND_SOC_DAIFMT_I2S:
 165                 iface |= 0x0002;
 166                 break;
 167         case SND_SOC_DAIFMT_RIGHT_J:
 168                 break;
 169         case SND_SOC_DAIFMT_LEFT_J:
 170                 iface |= 0x0001;
 171                 break;
 172         default:
 173                 return -EINVAL;
 174         }
 175
 176         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 177         case SND_SOC_DAIFMT_NB_NF:
 178                 break;
 179         case SND_SOC_DAIFMT_IB_IF:
 180                 iface |= 0x00c;
 181                 break;
 182         case SND_SOC_DAIFMT_IB_NF:
 183                 iface |= 0x008;
 184                 break;
 185         case SND_SOC_DAIFMT_NB_IF:
 186                 iface |= 0x004;
 187                 break;
 188         default:
 189                 return -EINVAL;
 190         }
 191
 192         /* Finally, write out the values */
 193         snd_soc_update_bits(codec, reg, 0xf, iface);
 194         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 195
 196         return 0;
 197 }
 198
 199 static int mclk_ratios[] = {
 200         128,
 201         192,
 202         256,
 203         384,
 204         512,
 205         768,
 206 };
 207
 208 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 209                             struct snd_pcm_hw_params *params,
 210                             struct snd_soc_dai *dai)
 211 {
 212         struct snd_soc_codec *codec = dai->codec;
 213         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 214         int iface_reg, iface;
 215         int ratio_shift, master;
 216         int i;
 217
 218         switch (dai->driver->id) {
 219         case WM8776_DAI_DAC:
 220                 iface_reg = WM8776_DACIFCTRL;
 221                 master = 0x80;
 222                 ratio_shift = 4;
 223                 break;
 224         case WM8776_DAI_ADC:
 225                 iface_reg = WM8776_ADCIFCTRL;
 226                 master = 0x100;
 227                 ratio_shift = 0;
 228                 break;
 229         default:
 230                 return -EINVAL;
 231         }
 232
 233         /* Set word length */
 234         switch (snd_pcm_format_width(params_format(params))) {
 235         case 16:
 236                 iface = 0;
 237                 break;
 238         case 20:
 239                 iface = 0x10;
 240                 break;
 241         case 24:
 242                 iface = 0x20;
 243                 break;
 244         case 32:
 245                 iface = 0x30;
 246                 break;
 247         default:
 248                 dev_err(codec->dev, "Unsupported sample size: %i\n",
 249                         snd_pcm_format_width(params_format(params)));
 250                 return -EINVAL;
 251         }
 252
 253         /* Only need to set MCLK/LRCLK ratio if we're master */
 254         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 255                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 256                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 257                             == mclk_ratios[i])
 258                                 break;
 259                 }
 260
 261                 if (i == ARRAY_SIZE(mclk_ratios)) {
 262                         dev_err(codec->dev,
 263                                 "Unable to configure MCLK ratio %d/%d\n",
 264                                 wm8776->sysclk[dai->driver->id], params_rate(params));
 265                         return -EINVAL;
 266                 }
 267
 268                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 269
 270                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 271                                     0x7 << ratio_shift, i << ratio_shift);
 272         } else {
 273                 dev_dbg(codec->dev, "DAI in slave mode\n");
 274         }
 275
 276         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 277
 278         return 0;
 279 }
 280
 281 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 282 {
 283         struct snd_soc_codec *codec = dai->codec;
 284
 285         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 286 }
 287
 288 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 289                              int clk_id, unsigned int freq, int dir)
 290 {
 291         struct snd_soc_codec *codec = dai->codec;
 292         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 293
 294         BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
 295
 296         wm8776->sysclk[dai->driver->id] = freq;
 297
 298         return 0;
 299 }
 300
 301 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 302                                  enum snd_soc_bias_level level)
 303 {
 304         switch (level) {
 305         case SND_SOC_BIAS_ON:
 306                 break;
 307         case SND_SOC_BIAS_PREPARE:
 308                 break;
 309         case SND_SOC_BIAS_STANDBY:
 310                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 311                         snd_soc_cache_sync(codec);
 312
 313                         /* Disable the global powerdown; DAPM does the rest */
 314                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 315                 }
 316
 317                 break;
 318         case SND_SOC_BIAS_OFF:
 319                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 320                 break;
 321         }
 322
 323         codec->dapm.bias_level = level;
 324         return 0;
 325 }
 326
 327 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 328                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 329
 330 static const struct snd_soc_dai_ops wm8776_dac_ops = {
 331         .digital_mute   = wm8776_mute,
 332         .hw_params      = wm8776_hw_params,
 333         .set_fmt        = wm8776_set_fmt,
 334         .set_sysclk     = wm8776_set_sysclk,
 335 };
 336
 337 static const struct snd_soc_dai_ops wm8776_adc_ops = {
 338         .hw_params      = wm8776_hw_params,
 339         .set_fmt        = wm8776_set_fmt,
 340         .set_sysclk     = wm8776_set_sysclk,
 341 };
 342
 343 static struct snd_soc_dai_driver wm8776_dai[] = {
 344         {
 345                 .name = "wm8776-hifi-playback",
 346                 .id     = WM8776_DAI_DAC,
 347                 .playback = {
 348                         .stream_name = "Playback",
 349                         .channels_min = 2,
 350                         .channels_max = 2,
 351                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
 352                         .rate_min = 32000,
 353                         .rate_max = 192000,
 354                         .formats = WM8776_FORMATS,
 355                 },
 356                 .ops = &wm8776_dac_ops,
 357         },
 358         {
 359                 .name = "wm8776-hifi-capture",
 360                 .id     = WM8776_DAI_ADC,
 361                 .capture = {
 362                         .stream_name = "Capture",
 363                         .channels_min = 2,
 364                         .channels_max = 2,
 365                         .rates = SNDRV_PCM_RATE_CONTINUOUS,
 366                         .rate_min = 32000,
 367                         .rate_max = 96000,
 368                         .formats = WM8776_FORMATS,
 369                 },
 370                 .ops = &wm8776_adc_ops,
 371         },
 372 };
 373
 374 #ifdef CONFIG_PM
 375 static int wm8776_suspend(struct snd_soc_codec *codec)
 376 {
 377         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 378
 379         return 0;
 380 }
 381
 382 static int wm8776_resume(struct snd_soc_codec *codec)
 383 {
 384         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 385         return 0;
 386 }
 387 #else
 388 #define wm8776_suspend NULL
 389 #define wm8776_resume NULL
 390 #endif
 391
 392 static int wm8776_probe(struct snd_soc_codec *codec)
 393 {
 394         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 395         int ret = 0;
 396
 397         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
 398         if (ret < 0) {
 399                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 400                 return ret;
 401         }
 402
 403         ret = wm8776_reset(codec);
 404         if (ret < 0) {
 405                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 406                 return ret;
 407         }
 408
 409         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 410
 411         /* Latch the update bits; right channel only since we always
 412          * update both. */
 413         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 414         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 415
 416         return ret;
 417 }
 418
 419 /* power down chip */
 420 static int wm8776_remove(struct snd_soc_codec *codec)
 421 {
 422         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 423         return 0;
 424 }
 425
 426 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
 427         .probe =        wm8776_probe,
 428         .remove =       wm8776_remove,
 429         .suspend =      wm8776_suspend,
 430         .resume =       wm8776_resume,
 431         .set_bias_level = wm8776_set_bias_level,
 432         .reg_cache_size = ARRAY_SIZE(wm8776_reg),
 433         .reg_word_size = sizeof(u16),
 434         .reg_cache_default = wm8776_reg,
 435
 436         .controls = wm8776_snd_controls,
 437         .num_controls = ARRAY_SIZE(wm8776_snd_controls),
 438         .dapm_widgets = wm8776_dapm_widgets,
 439         .num_dapm_widgets = ARRAY_SIZE(wm8776_dapm_widgets),
 440         .dapm_routes = routes,
 441         .num_dapm_routes = ARRAY_SIZE(routes),
 442 };
 443
 444 static const struct of_device_id wm8776_of_match[] = {
 445         { .compatible = "wlf,wm8776", },
 446         { }
 447 };
 448 MODULE_DEVICE_TABLE(of, wm8776_of_match);
 449
 450 #if defined(CONFIG_SPI_MASTER)
 451 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 452 {
 453         struct wm8776_priv *wm8776;
 454         int ret;
 455
 456         wm8776 = devm_kzalloc(&spi->dev, sizeof(struct wm8776_priv),
 457                               GFP_KERNEL);
 458         if (wm8776 == NULL)
 459                 return -ENOMEM;
 460
 461         wm8776->control_type = SND_SOC_SPI;
 462         spi_set_drvdata(spi, wm8776);
 463
 464         ret = snd_soc_register_codec(&spi->dev,
 465                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 466
 467         return ret;
 468 }
 469
 470 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 471 {
 472         snd_soc_unregister_codec(&spi->dev);
 473         return 0;
 474 }
 475
 476 static struct spi_driver wm8776_spi_driver = {
 477         .driver = {
 478                 .name   = "wm8776",
 479                 .owner  = THIS_MODULE,
 480                 .of_match_table = wm8776_of_match,
 481         },
 482         .probe          = wm8776_spi_probe,
 483         .remove         = __devexit_p(wm8776_spi_remove),
 484 };
 485 #endif /* CONFIG_SPI_MASTER */
 486
 487 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 488 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 489                                       const struct i2c_device_id *id)
 490 {
 491         struct wm8776_priv *wm8776;
 492         int ret;
 493
 494         wm8776 = devm_kzalloc(&i2c->dev, sizeof(struct wm8776_priv),
 495                               GFP_KERNEL);
 496         if (wm8776 == NULL)
 497                 return -ENOMEM;
 498
 499         i2c_set_clientdata(i2c, wm8776);
 500         wm8776->control_type = SND_SOC_I2C;
 501
 502         ret =  snd_soc_register_codec(&i2c->dev,
 503                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 504
 505         return ret;
 506 }
 507
 508 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 509 {
 510         snd_soc_unregister_codec(&client->dev);
 511         return 0;
 512 }
 513
 514 static const struct i2c_device_id wm8776_i2c_id[] = {
 515         { "wm8776", 0 },
 516         { }
 517 };
 518 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 519
 520 static struct i2c_driver wm8776_i2c_driver = {
 521         .driver = {
 522                 .name = "wm8776",
 523                 .owner = THIS_MODULE,
 524                 .of_match_table = wm8776_of_match,
 525         },
 526         .probe =    wm8776_i2c_probe,
 527         .remove =   __devexit_p(wm8776_i2c_remove),
 528         .id_table = wm8776_i2c_id,
 529 };
 530 #endif
 531
 532 static int __init wm8776_modinit(void)
 533 {
 534         int ret = 0;
 535 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 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 defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 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");