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