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/soc-dapm.h>
  29 #include <sound/initval.h>
  30 #include <sound/tlv.h>
  31
  32 #include "wm8776.h"
  33
  34 /* codec private data */
  35 struct wm8776_priv {
  36         enum snd_soc_control_type control_type;
  37         void *control_data;
  38         u16 reg_cache[WM8776_CACHEREGNUM];
  39         int sysclk[2];
  40 };
  41
  42 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
  43         0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
  44         0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
  45         0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
  46         0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
  47         0xa6, 0x01, 0x01
  48 };
  49
  50 static int wm8776_reset(struct snd_soc_codec *codec)
  51 {
  52         return snd_soc_write(codec, WM8776_RESET, 0);
  53 }
  54
  55 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  56 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  57 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  58
  59 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  60 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  61                  0, 127, 0, hp_tlv),
  62 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  63                  0, 255, 0, dac_tlv),
  64 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  65
  66 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  67
  68 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  69                  0, 255, 0, adc_tlv),
  70 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  71 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  72 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  73 };
  74
  75 static const struct snd_kcontrol_new inmix_controls[] = {
  76 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  77 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  78 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  79 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  80 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  81 };
  82
  83 static const struct snd_kcontrol_new outmix_controls[] = {
  84 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  85 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  86 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  87 };
  88
  89 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  90 SND_SOC_DAPM_INPUT("AUX"),
  91
  92 SND_SOC_DAPM_INPUT("AIN1"),
  93 SND_SOC_DAPM_INPUT("AIN2"),
  94 SND_SOC_DAPM_INPUT("AIN3"),
  95 SND_SOC_DAPM_INPUT("AIN4"),
  96 SND_SOC_DAPM_INPUT("AIN5"),
  97
  98 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
  99                    inmix_controls, ARRAY_SIZE(inmix_controls)),
 100
 101 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 102 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 103
 104 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 105                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 106
 107 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 108
 109 SND_SOC_DAPM_OUTPUT("VOUT"),
 110
 111 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 112 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 113 };
 114
 115 static const struct snd_soc_dapm_route routes[] = {
 116         { "Input Mixer", "AIN1 Switch", "AIN1" },
 117         { "Input Mixer", "AIN2 Switch", "AIN2" },
 118         { "Input Mixer", "AIN3 Switch", "AIN3" },
 119         { "Input Mixer", "AIN4 Switch", "AIN4" },
 120         { "Input Mixer", "AIN5 Switch", "AIN5" },
 121
 122         { "ADC", NULL, "Input Mixer" },
 123
 124         { "Output Mixer", "DAC Switch", "DAC" },
 125         { "Output Mixer", "AUX Switch", "AUX" },
 126         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 127
 128         { "VOUT", NULL, "Output Mixer" },
 129
 130         { "Headphone PGA", NULL, "Output Mixer" },
 131
 132         { "HPOUTL", NULL, "Headphone PGA" },
 133         { "HPOUTR", NULL, "Headphone PGA" },
 134 };
 135
 136 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 137 {
 138         struct snd_soc_codec *codec = dai->codec;
 139         int reg, iface, master;
 140
 141         switch (dai->driver->id) {
 142         case WM8776_DAI_DAC:
 143                 reg = WM8776_DACIFCTRL;
 144                 master = 0x80;
 145                 break;
 146         case WM8776_DAI_ADC:
 147                 reg = WM8776_ADCIFCTRL;
 148                 master = 0x100;
 149                 break;
 150         default:
 151                 return -EINVAL;
 152         }
 153
 154         iface = 0;
 155
 156         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 157         case SND_SOC_DAIFMT_CBM_CFM:
 158                 break;
 159         case SND_SOC_DAIFMT_CBS_CFS:
 160                 master = 0;
 161                 break;
 162         default:
 163                 return -EINVAL;
 164         }
 165
 166         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 167         case SND_SOC_DAIFMT_I2S:
 168                 iface |= 0x0002;
 169                 break;
 170         case SND_SOC_DAIFMT_RIGHT_J:
 171                 break;
 172         case SND_SOC_DAIFMT_LEFT_J:
 173                 iface |= 0x0001;
 174                 break;
 175                 /* FIXME: CHECK A/B */
 176         case SND_SOC_DAIFMT_DSP_A:
 177                 iface |= 0x0003;
 178                 break;
 179         case SND_SOC_DAIFMT_DSP_B:
 180                 iface |= 0x0007;
 181                 break;
 182         default:
 183                 return -EINVAL;
 184         }
 185
 186         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 187         case SND_SOC_DAIFMT_NB_NF:
 188                 break;
 189         case SND_SOC_DAIFMT_IB_IF:
 190                 iface |= 0x00c;
 191                 break;
 192         case SND_SOC_DAIFMT_IB_NF:
 193                 iface |= 0x008;
 194                 break;
 195         case SND_SOC_DAIFMT_NB_IF:
 196                 iface |= 0x004;
 197                 break;
 198         default:
 199                 return -EINVAL;
 200         }
 201
 202         /* Finally, write out the values */
 203         snd_soc_update_bits(codec, reg, 0xf, iface);
 204         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 205
 206         return 0;
 207 }
 208
 209 static int mclk_ratios[] = {
 210         128,
 211         192,
 212         256,
 213         384,
 214         512,
 215         768,
 216 };
 217
 218 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 219                             struct snd_pcm_hw_params *params,
 220                             struct snd_soc_dai *dai)
 221 {
 222         struct snd_soc_codec *codec = dai->codec;
 223         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 224         int iface_reg, iface;
 225         int ratio_shift, master;
 226         int i;
 227
 228         iface = 0;
 229
 230         switch (dai->driver->id) {
 231         case WM8776_DAI_DAC:
 232                 iface_reg = WM8776_DACIFCTRL;
 233                 master = 0x80;
 234                 ratio_shift = 4;
 235                 break;
 236         case WM8776_DAI_ADC:
 237                 iface_reg = WM8776_ADCIFCTRL;
 238                 master = 0x100;
 239                 ratio_shift = 0;
 240                 break;
 241         default:
 242                 return -EINVAL;
 243         }
 244
 245
 246         /* Set word length */
 247         switch (params_format(params)) {
 248         case SNDRV_PCM_FORMAT_S16_LE:
 249                 break;
 250         case SNDRV_PCM_FORMAT_S20_3LE:
 251                 iface |= 0x10;
 252                 break;
 253         case SNDRV_PCM_FORMAT_S24_LE:
 254                 iface |= 0x20;
 255                 break;
 256         case SNDRV_PCM_FORMAT_S32_LE:
 257                 iface |= 0x30;
 258                 break;
 259         }
 260
 261         /* Only need to set MCLK/LRCLK ratio if we're master */
 262         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 263                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 264                         if (wm8776->sysclk[dai->driver->id] / params_rate(params)
 265                             == mclk_ratios[i])
 266                                 break;
 267                 }
 268
 269                 if (i == ARRAY_SIZE(mclk_ratios)) {
 270                         dev_err(codec->dev,
 271                                 "Unable to configure MCLK ratio %d/%d\n",
 272                                 wm8776->sysclk[dai->driver->id], params_rate(params));
 273                         return -EINVAL;
 274                 }
 275
 276                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 277
 278                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 279                                     0x7 << ratio_shift, i << ratio_shift);
 280         } else {
 281                 dev_dbg(codec->dev, "DAI in slave mode\n");
 282         }
 283
 284         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 285
 286         return 0;
 287 }
 288
 289 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 290 {
 291         struct snd_soc_codec *codec = dai->codec;
 292
 293         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 294 }
 295
 296 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 297                              int clk_id, unsigned int freq, int dir)
 298 {
 299         struct snd_soc_codec *codec = dai->codec;
 300         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 301
 302         BUG_ON(dai->driver->id >= ARRAY_SIZE(wm8776->sysclk));
 303
 304         wm8776->sysclk[dai->driver->id] = freq;
 305
 306         return 0;
 307 }
 308
 309 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 310                                  enum snd_soc_bias_level level)
 311 {
 312         switch (level) {
 313         case SND_SOC_BIAS_ON:
 314                 break;
 315         case SND_SOC_BIAS_PREPARE:
 316                 break;
 317         case SND_SOC_BIAS_STANDBY:
 318                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 319                         /* Disable the global powerdown; DAPM does the rest */
 320                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 321                 }
 322
 323                 break;
 324         case SND_SOC_BIAS_OFF:
 325                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 326                 break;
 327         }
 328
 329         codec->bias_level = level;
 330         return 0;
 331 }
 332
 333 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 334                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 335                       SNDRV_PCM_RATE_96000)
 336
 337
 338 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 339                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 340
 341 static struct snd_soc_dai_ops wm8776_dac_ops = {
 342         .digital_mute   = wm8776_mute,
 343         .hw_params      = wm8776_hw_params,
 344         .set_fmt        = wm8776_set_fmt,
 345         .set_sysclk     = wm8776_set_sysclk,
 346 };
 347
 348 static struct snd_soc_dai_ops wm8776_adc_ops = {
 349         .hw_params      = wm8776_hw_params,
 350         .set_fmt        = wm8776_set_fmt,
 351         .set_sysclk     = wm8776_set_sysclk,
 352 };
 353
 354 static struct snd_soc_dai_driver wm8776_dai[] = {
 355         {
 356                 .name = "wm8776-hifi-playback",
 357                 .id     = WM8776_DAI_DAC,
 358                 .playback = {
 359                         .stream_name = "Playback",
 360                         .channels_min = 2,
 361                         .channels_max = 2,
 362                         .rates = WM8776_RATES,
 363                         .formats = WM8776_FORMATS,
 364                 },
 365                 .ops = &wm8776_dac_ops,
 366         },
 367         {
 368                 .name = "wm8776-hifi-capture",
 369                 .id     = WM8776_DAI_ADC,
 370                 .capture = {
 371                         .stream_name = "Capture",
 372                         .channels_min = 2,
 373                         .channels_max = 2,
 374                         .rates = WM8776_RATES,
 375                         .formats = WM8776_FORMATS,
 376                 },
 377                 .ops = &wm8776_adc_ops,
 378         },
 379 };
 380
 381 #ifdef CONFIG_PM
 382 static int wm8776_suspend(struct snd_soc_codec *codec, pm_message_t state)
 383 {
 384         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 385
 386         return 0;
 387 }
 388
 389 static int wm8776_resume(struct snd_soc_codec *codec)
 390 {
 391         int i;
 392         u8 data[2];
 393         u16 *cache = codec->reg_cache;
 394
 395         /* Sync reg_cache with the hardware */
 396         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 397                 if (cache[i] == wm8776_reg[i])
 398                         continue;
 399                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 400                 data[1] = cache[i] & 0x00ff;
 401                 codec->hw_write(codec->control_data, data, 2);
 402         }
 403
 404         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 405
 406         return 0;
 407 }
 408 #else
 409 #define wm8776_suspend NULL
 410 #define wm8776_resume NULL
 411 #endif
 412
 413 static int wm8776_probe(struct snd_soc_codec *codec)
 414 {
 415         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 416         int ret = 0;
 417
 418         codec->control_data = wm8776->control_data;
 419         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8776->control_type);
 420         if (ret < 0) {
 421                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 422                 return ret;
 423         }
 424
 425         ret = wm8776_reset(codec);
 426         if (ret < 0) {
 427                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 428                 return ret;
 429         }
 430
 431         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 432
 433         /* Latch the update bits; right channel only since we always
 434          * update both. */
 435         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 436         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 437
 438         snd_soc_add_controls(codec, wm8776_snd_controls,
 439                              ARRAY_SIZE(wm8776_snd_controls));
 440         snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
 441                                   ARRAY_SIZE(wm8776_dapm_widgets));
 442         snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
 443
 444         return ret;
 445 }
 446
 447 /* power down chip */
 448 static int wm8776_remove(struct snd_soc_codec *codec)
 449 {
 450         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 451         return 0;
 452 }
 453
 454 static struct snd_soc_codec_driver soc_codec_dev_wm8776 = {
 455         .probe =        wm8776_probe,
 456         .remove =       wm8776_remove,
 457         .suspend =      wm8776_suspend,
 458         .resume =       wm8776_resume,
 459         .set_bias_level = wm8776_set_bias_level,
 460         .reg_cache_size = sizeof(wm8776_reg),
 461         .reg_word_size = sizeof(u16),
 462         .reg_cache_default = wm8776_reg,
 463 };
 464
 465 #if defined(CONFIG_SPI_MASTER)
 466 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 467 {
 468         struct wm8776_priv *wm8776;
 469         int ret;
 470
 471         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 472         if (wm8776 == NULL)
 473                 return -ENOMEM;
 474
 475         wm8776->control_data = spi;
 476         wm8776->control_type = SND_SOC_SPI;
 477         spi_set_drvdata(spi, wm8776);
 478
 479         ret = snd_soc_register_codec(&spi->dev,
 480                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 481         if (ret < 0)
 482                 kfree(wm8776);
 483         return ret;
 484 }
 485
 486 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 487 {
 488         snd_soc_unregister_codec(&spi->dev);
 489         kfree(spi_get_drvdata(spi));
 490         return 0;
 491 }
 492
 493 static struct spi_driver wm8776_spi_driver = {
 494         .driver = {
 495                 .name   = "wm8776-codec",
 496                 .bus    = &spi_bus_type,
 497                 .owner  = THIS_MODULE,
 498         },
 499         .probe          = wm8776_spi_probe,
 500         .remove         = __devexit_p(wm8776_spi_remove),
 501 };
 502 #endif /* CONFIG_SPI_MASTER */
 503
 504 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 505 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 506                                       const struct i2c_device_id *id)
 507 {
 508         struct wm8776_priv *wm8776;
 509         int ret;
 510
 511         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 512         if (wm8776 == NULL)
 513                 return -ENOMEM;
 514
 515         i2c_set_clientdata(i2c, wm8776);
 516         wm8776->control_data = i2c;
 517         wm8776->control_type = SND_SOC_I2C;
 518
 519         ret =  snd_soc_register_codec(&i2c->dev,
 520                         &soc_codec_dev_wm8776, wm8776_dai, ARRAY_SIZE(wm8776_dai));
 521         if (ret < 0)
 522                 kfree(wm8776);
 523         return ret;
 524 }
 525
 526 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 527 {
 528         snd_soc_unregister_codec(&client->dev);
 529         kfree(i2c_get_clientdata(client));
 530         return 0;
 531 }
 532
 533 static const struct i2c_device_id wm8776_i2c_id[] = {
 534         { "wm8776", 0 },
 535         { }
 536 };
 537 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 538
 539 static struct i2c_driver wm8776_i2c_driver = {
 540         .driver = {
 541                 .name = "wm8776-codec",
 542                 .owner = THIS_MODULE,
 543         },
 544         .probe =    wm8776_i2c_probe,
 545         .remove =   __devexit_p(wm8776_i2c_remove),
 546         .id_table = wm8776_i2c_id,
 547 };
 548 #endif
 549
 550 static int __init wm8776_modinit(void)
 551 {
 552         int ret = 0;
 553 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 554         ret = i2c_add_driver(&wm8776_i2c_driver);
 555         if (ret != 0) {
 556                 printk(KERN_ERR "Failed to register wm8776 I2C driver: %d\n",
 557                        ret);
 558         }
 559 #endif
 560 #if defined(CONFIG_SPI_MASTER)
 561         ret = spi_register_driver(&wm8776_spi_driver);
 562         if (ret != 0) {
 563                 printk(KERN_ERR "Failed to register wm8776 SPI driver: %d\n",
 564                        ret);
 565         }
 566 #endif
 567         return ret;
 568 }
 569 module_init(wm8776_modinit);
 570
 571 static void __exit wm8776_exit(void)
 572 {
 573 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 574         i2c_del_driver(&wm8776_i2c_driver);
 575 #endif
 576 #if defined(CONFIG_SPI_MASTER)
 577         spi_unregister_driver(&wm8776_spi_driver);
 578 #endif
 579 }
 580 module_exit(wm8776_exit);
 581
 582 MODULE_DESCRIPTION("ASoC WM8776 driver");
 583 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 584 MODULE_LICENSE("GPL");