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/platform_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         iface = 0;
 219
 220         switch (dai->driver->id) {
 221         case WM8776_DAI_DAC:
 222                 iface_reg = WM8776_DACIFCTRL;
 223                 master = 0x80;
 224                 ratio_shift = 4;
 225                 break;
 226         case WM8776_DAI_ADC:
 227                 iface_reg = WM8776_ADCIFCTRL;
 228                 master = 0x100;
 229                 ratio_shift = 0;
 230                 break;
 231         default:
 232                 return -EINVAL;
 233         }
 234
 235
 236         /* Set word length */
 237         switch (params_format(params)) {
 238         case SNDRV_PCM_FORMAT_S16_LE:
 239                 break;
 240         case SNDRV_PCM_FORMAT_S20_3LE:
 241                 iface |= 0x10;
 242                 break;
 243         case SNDRV_PCM_FORMAT_S24_LE:
 244                 iface |= 0x20;
 245                 break;
 246         case SNDRV_PCM_FORMAT_S32_LE:
 247                 iface |= 0x30;
 248                 break;
 249         }
 250
 251         /* Only need to set MCLK/LRCLK ratio if we're master */
 252         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 253                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 254                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 255                             == mclk_ratios[i])
 256                                 break;
 257                 }
 258
 259                 if (i == ARRAY_SIZE(mclk_ratios)) {
 260                         dev_err(codec->dev,
 261                                 "Unable to configure MCLK ratio %d/%d\n",
 262                                 wm8776->sysclk[dai->driver->id], params_rate(params));
 263                         return -EINVAL;
 264                 }
 265
 266                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 267
 268                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 269                                     0x7 << ratio_shift, i << ratio_shift);
 270         } else {
 271                 dev_dbg(codec->dev, "DAI in slave mode\n");
 272         }
 273
 274         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 275
 276         return 0;
 277 }
 278
 279 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 280 {
 281         struct snd_soc_codec *codec = dai->codec;
 282
 283         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 284 }
 285
 286 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 287                              int clk_id, unsigned int freq, int dir)
 288 {
 289         struct snd_soc_codec *codec = dai->codec;
 290         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 291
 292         BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
 293
 294         wm8776->sysclk[dai->driver->id] = freq;
 295
 296         return 0;
 297 }
 298
 299 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 300                                  enum snd_soc_bias_level level)
 301 {
 302         switch (level) {
 303         case SND_SOC_BIAS_ON:
 304                 break;
 305         case SND_SOC_BIAS_PREPARE:
 306                 break;
 307         case SND_SOC_BIAS_STANDBY:
 308                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 309                         /* Disable the global powerdown; DAPM does the rest */
 310                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 311                 }
 312
 313                 break;
 314         case SND_SOC_BIAS_OFF:
 315                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 316                 break;
 317         }
 318
 319         codec->dapm.bias_level = level;
 320         return 0;
 321 }
 322
 323 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 324                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 325                       SNDRV_PCM_RATE_96000)
 326
 327
 328 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 329                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 330
 331 static struct snd_soc_dai_ops wm8776_dac_ops = {
 332         .digital_mute   = wm8776_mute,
 333         .hw_params      = wm8776_hw_params,
 334         .set_fmt        = wm8776_set_fmt,
 335         .set_sysclk     = wm8776_set_sysclk,
 336 };
 337
 338 static struct snd_soc_dai_ops wm8776_adc_ops = {
 339         .hw_params      = wm8776_hw_params,
 340         .set_fmt        = wm8776_set_fmt,
 341         .set_sysclk     = wm8776_set_sysclk,
 342 };
 343
 344 static struct snd_soc_dai_driver wm8776_dai[] = {
 345         {
 346                 .name = "wm8776-hifi-playback",
 347                 .id     = WM8776_DAI_DAC,
 348                 .playback = {
 349                         .stream_name = "Playback",
 350                         .channels_min = 2,
 351                         .channels_max = 2,
 352                         .rates = WM8776_RATES,
 353                         .formats = WM8776_FORMATS,
 354                 },
 355                 .ops = &wm8776_dac_ops,
 356         },
 357         {
 358                 .name = "wm8776-hifi-capture",
 359                 .id     = WM8776_DAI_ADC,
 360                 .capture = {
 361                         .stream_name = "Capture",
 362                         .channels_min = 2,
 363                         .channels_max = 2,
 364                         .rates = WM8776_RATES,
 365                         .formats = WM8776_FORMATS,
 366                 },
 367                 .ops = &wm8776_adc_ops,
 368         },
 369 };
 370
 371 #ifdef CONFIG_PM
 372 static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
 373 {
 374         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 375
 376         return 0;
 377 }
 378
 379 static int wm8776_resume(struct snd_soc_codec *codec)
 380 {
 381         int i;
 382         u8 data[2];
 383         u16 *cache = codec->reg_cache;
 384
 385         /* Sync reg_cache with the hardware */
 386         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 387                 if (cache[i] == wm8776_reg[i])
 388                         continue;
 389                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 390                 data[1] = cache[i] & 0x00ff;
 391                 codec->hw_write(codec->control_data, data, 2);
 392         }
 393
 394         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 395
 396         return 0;
 397 }
 398 #else
 399 #define wm8776_suspend NULL
 400 #define wm8776_resume NULL
 401 #endif
 402
 403 static int wm8776_probe(struct snd_soc_codec *codec)
 404 {
 405         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 406         struct snd_soc_dapm_context *dapm = &codec->dapm;
 407         int ret = 0;
 408
 409         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
 410         if (ret < 0) {
 411                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 412                 return ret;
 413         }
 414
 415         ret = wm8776_reset(codec);
 416         if (ret < 0) {
 417                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 418                 return ret;
 419         }
 420
 421         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 422
 423         /* Latch the update bits; right channel only since we always
 424          * update both. */
 425         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 426         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 427
 428         snd_soc_add_controls(codec, wm8776_snd_controls,
 429                              ARRAY_SIZE(wm8776_snd_controls));
 430         snd_soc_dapm_new_controls(dapm, wm8776_dapm_widgets,
 431                                   ARRAY_SIZE(wm8776_dapm_widgets));
 432         snd_soc_dapm_add_routes(dapm, routes, ARRAY_SIZE(routes));
 433
 434         return ret;
 435 }
 436
 437 /* power down chip */
 438 static int wm8776_remove(struct snd_soc_codec *codec)
 439 {
 440         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 441         return 0;
 442 }
 443
 444 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
 445         .probe =        wm8776_probe,
 446         .remove =       wm8776_remove,
 447         .suspend =      wm8776_suspend,
 448         .resume =       wm8776_resume,
 449         .set_bias_level = wm8776_set_bias_level,
 450         .reg_cache_size = ARRAY_SIZE(wm8776_reg),
 451         .reg_word_size = sizeof(u16),
 452         .reg_cache_default = wm8776_reg,
 453 };
 454
 455 #if defined(CONFIG_SPI_MASTER)
 456 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 457 {
 458         struct wm8776_priv *wm8776;
 459         int ret;
 460
 461         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 462         if (wm8776 == NULL)
 463                 return -ENOMEM;
 464
 465         wm8776->control_type = SND_SOC_SPI;
 466         spi_set_drvdata(spi, wm8776);
 467
 468         ret = snd_soc_register_codec(&spi->dev,
 469                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 470         if (ret < 0)
 471                 kfree(wm8776);
 472         return ret;
 473 }
 474
 475 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 476 {
 477         snd_soc_unregister_codec(&spi->dev);
 478         kfree(spi_get_drvdata(spi));
 479         return 0;
 480 }
 481
 482 static struct spi_driver wm8776_spi_driver = {
 483         .driver = {
 484                 .name   = "wm8776-codec",
 485                 .owner  = THIS_MODULE,
 486         },
 487         .probe          = wm8776_spi_probe,
 488         .remove         = __devexit_p(wm8776_spi_remove),
 489 };
 490 #endif /* CONFIG_SPI_MASTER */
 491
 492 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 493 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 494                                       const struct i2c_device_id *id)
 495 {
 496         struct wm8776_priv *wm8776;
 497         int ret;
 498
 499         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 500         if (wm8776 == NULL)
 501                 return -ENOMEM;
 502
 503         i2c_set_clientdata(i2c, wm8776);
 504         wm8776->control_type = SND_SOC_I2C;
 505
 506         ret =  snd_soc_register_codec(&i2c->dev,
 507                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 508         if (ret < 0)
 509                 kfree(wm8776);
 510         return ret;
 511 }
 512
 513 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 514 {
 515         snd_soc_unregister_codec(&client->dev);
 516         kfree(i2c_get_clientdata(client));
 517         return 0;
 518 }
 519
 520 static const struct i2c_device_id wm8776_i2c_id[] = {
 521         { "wm8776", 0 },
 522         { }
 523 };
 524 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 525
 526 static struct i2c_driver wm8776_i2c_driver = {
 527         .driver = {
 528                 .name = "wm8776-codec",
 529                 .owner = THIS_MODULE,
 530         },
 531         .probe =    wm8776_i2c_probe,
 532         .remove =   __devexit_p(wm8776_i2c_remove),
 533         .id_table = wm8776_i2c_id,
 534 };
 535 #endif
 536
 537 static int __init wm8776_modinit(void)
 538 {
 539         int ret = 0;
 540 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 541         ret = i2c_add_driver(&wm8776_i2c_driver);
 542         if (ret != 0) {
 543                 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
 544                        ret);
 545         }
 546 #endif
 547 #if defined(CONFIG_SPI_MASTER)
 548         ret = spi_register_driver(&wm8776_spi_driver);
 549         if (ret != 0) {
 550                 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
 551                        ret);
 552         }
 553 #endif
 554         return ret;
 555 }
 556 module_init(wm8776_modinit);
 557
 558 static void __exit wm8776_exit(void)
 559 {
 560 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 561         i2c_del_driver(&wm8776_i2c_driver);
 562 #endif
 563 #if defined(CONFIG_SPI_MASTER)
 564         spi_unregister_driver(&wm8776_spi_driver);
 565 #endif
 566 }
 567 module_exit(wm8776_exit);
 568
 569 MODULE_DESCRIPTION("ASoC WM8776 driver");
 570 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 571 MODULE_LICENSE("GPL");