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 static struct snd_soc_codec *wm8776_codec;
  35 struct snd_soc_codec_device soc_codec_dev_wm8776;
  36
  37 /* codec private data */
  38 struct wm8776_priv {
  39         struct snd_soc_codec codec;
  40         u16 reg_cache[WM8776_CACHEREGNUM];
  41         int sysclk[2];
  42 };
  43
  44 #ifdef CONFIG_SPI_MASTER
  45 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len);
  46 #endif
  47
  48 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
  49         0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
  50         0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
  51         0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
  52         0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
  53         0xa6, 0x01, 0x01
  54 };
  55
  56 static int wm8776_reset(struct snd_soc_codec *codec)
  57 {
  58         return snd_soc_write(codec, WM8776_RESET, 0);
  59 }
  60
  61 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  62 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  63 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  64
  65 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  66 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  67                  0, 127, 0, hp_tlv),
  68 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  69                  0, 255, 0, dac_tlv),
  70 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  71
  72 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  73
  74 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  75                  0, 255, 0, adc_tlv),
  76 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  77 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  78 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  79 };
  80
  81 static const struct snd_kcontrol_new inmix_controls[] = {
  82 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  83 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  84 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  85 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  86 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  87 };
  88
  89 static const struct snd_kcontrol_new outmix_controls[] = {
  90 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  91 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  92 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  93 };
  94
  95 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  96 SND_SOC_DAPM_INPUT("AUX"),
  97
  98 SND_SOC_DAPM_INPUT("AIN1"),
  99 SND_SOC_DAPM_INPUT("AIN2"),
 100 SND_SOC_DAPM_INPUT("AIN3"),
 101 SND_SOC_DAPM_INPUT("AIN4"),
 102 SND_SOC_DAPM_INPUT("AIN5"),
 103
 104 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
 105                    inmix_controls, ARRAY_SIZE(inmix_controls)),
 106
 107 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 108 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 109
 110 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 111                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 112
 113 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 114
 115 SND_SOC_DAPM_OUTPUT("VOUT"),
 116
 117 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 118 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 119 };
 120
 121 static const struct snd_soc_dapm_route routes[] = {
 122         { "Input Mixer", "AIN1 Switch", "AIN1" },
 123         { "Input Mixer", "AIN2 Switch", "AIN2" },
 124         { "Input Mixer", "AIN3 Switch", "AIN3" },
 125         { "Input Mixer", "AIN4 Switch", "AIN4" },
 126         { "Input Mixer", "AIN5 Switch", "AIN5" },
 127
 128         { "ADC", NULL, "Input Mixer" },
 129
 130         { "Output Mixer", "DAC Switch", "DAC" },
 131         { "Output Mixer", "AUX Switch", "AUX" },
 132         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 133
 134         { "VOUT", NULL, "Output Mixer" },
 135
 136         { "Headphone PGA", NULL, "Output Mixer" },
 137
 138         { "HPOUTL", NULL, "Headphone PGA" },
 139         { "HPOUTR", NULL, "Headphone PGA" },
 140 };
 141
 142 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 143 {
 144         struct snd_soc_codec *codec = dai->codec;
 145         int reg, iface, master;
 146
 147         switch (dai->id) {
 148         case WM8776_DAI_DAC:
 149                 reg = WM8776_DACIFCTRL;
 150                 master = 0x80;
 151                 break;
 152         case WM8776_DAI_ADC:
 153                 reg = WM8776_ADCIFCTRL;
 154                 master = 0x100;
 155                 break;
 156         default:
 157                 return -EINVAL;
 158         }
 159
 160         iface = 0;
 161
 162         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 163         case SND_SOC_DAIFMT_CBM_CFM:
 164                 break;
 165         case SND_SOC_DAIFMT_CBS_CFS:
 166                 master = 0;
 167                 break;
 168         default:
 169                 return -EINVAL;
 170         }
 171
 172         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 173         case SND_SOC_DAIFMT_I2S:
 174                 iface |= 0x0002;
 175                 break;
 176         case SND_SOC_DAIFMT_RIGHT_J:
 177                 break;
 178         case SND_SOC_DAIFMT_LEFT_J:
 179                 iface |= 0x0001;
 180                 break;
 181         default:
 182                 return -EINVAL;
 183         }
 184
 185         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 186         case SND_SOC_DAIFMT_NB_NF:
 187                 break;
 188         case SND_SOC_DAIFMT_IB_IF:
 189                 iface |= 0x00c;
 190                 break;
 191         case SND_SOC_DAIFMT_IB_NF:
 192                 iface |= 0x008;
 193                 break;
 194         case SND_SOC_DAIFMT_NB_IF:
 195                 iface |= 0x004;
 196                 break;
 197         default:
 198                 return -EINVAL;
 199         }
 200
 201         /* Finally, write out the values */
 202         snd_soc_update_bits(codec, reg, 0xf, iface);
 203         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 204
 205         return 0;
 206 }
 207
 208 static int mclk_ratios[] = {
 209         128,
 210         192,
 211         256,
 212         384,
 213         512,
 214         768,
 215 };
 216
 217 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 218                             struct snd_pcm_hw_params *params,
 219                             struct snd_soc_dai *dai)
 220 {
 221         struct snd_soc_codec *codec = dai->codec;
 222         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 223         int iface_reg, iface;
 224         int ratio_shift, master;
 225         int i;
 226
 227         iface = 0;
 228
 229         switch (dai->id) {
 230         case WM8776_DAI_DAC:
 231                 iface_reg = WM8776_DACIFCTRL;
 232                 master = 0x80;
 233                 ratio_shift = 4;
 234                 break;
 235         case WM8776_DAI_ADC:
 236                 iface_reg = WM8776_ADCIFCTRL;
 237                 master = 0x100;
 238                 ratio_shift = 0;
 239                 break;
 240         default:
 241                 return -EINVAL;
 242         }
 243
 244
 245         /* Set word length */
 246         switch (params_format(params)) {
 247         case SNDRV_PCM_FORMAT_S16_LE:
 248                 break;
 249         case SNDRV_PCM_FORMAT_S20_3LE:
 250                 iface |= 0x10;
 251                 break;
 252         case SNDRV_PCM_FORMAT_S24_LE:
 253                 iface |= 0x20;
 254                 break;
 255         case SNDRV_PCM_FORMAT_S32_LE:
 256                 iface |= 0x30;
 257                 break;
 258         }
 259
 260         /* Only need to set MCLK/LRCLK ratio if we're master */
 261         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 262                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 263                         if (wm8776->sysclk[dai->id] / params_rate(params)
 264                             == mclk_ratios[i])
 265                                 break;
 266                 }
 267
 268                 if (i == ARRAY_SIZE(mclk_ratios)) {
 269                         dev_err(codec->dev,
 270                                 "Unable to configure MCLK ratio %d/%d\n",
 271                                 wm8776->sysclk[dai->id], params_rate(params));
 272                         return -EINVAL;
 273                 }
 274
 275                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 276
 277                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 278                                     0x7 << ratio_shift, i << ratio_shift);
 279         } else {
 280                 dev_dbg(codec->dev, "DAI in slave mode\n");
 281         }
 282
 283         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 284
 285         return 0;
 286 }
 287
 288 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 289 {
 290         struct snd_soc_codec *codec = dai->codec;
 291
 292         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 293 }
 294
 295 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 296                              int clk_id, unsigned int freq, int dir)
 297 {
 298         struct snd_soc_codec *codec = dai->codec;
 299         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 300
 301         BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
 302
 303         wm8776->sysclk[dai->id] = freq;
 304
 305         return 0;
 306 }
 307
 308 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 309                                  enum snd_soc_bias_level level)
 310 {
 311         switch (level) {
 312         case SND_SOC_BIAS_ON:
 313                 break;
 314         case SND_SOC_BIAS_PREPARE:
 315                 break;
 316         case SND_SOC_BIAS_STANDBY:
 317                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 318                         /* Disable the global powerdown; DAPM does the rest */
 319                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 320                 }
 321
 322                 break;
 323         case SND_SOC_BIAS_OFF:
 324                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 325                 break;
 326         }
 327
 328         codec->bias_level = level;
 329         return 0;
 330 }
 331
 332 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 333                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 334                       SNDRV_PCM_RATE_96000)
 335
 336
 337 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 338                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 339
 340 static struct snd_soc_dai_ops wm8776_dac_ops = {
 341         .digital_mute   = wm8776_mute,
 342         .hw_params      = wm8776_hw_params,
 343         .set_fmt        = wm8776_set_fmt,
 344         .set_sysclk     = wm8776_set_sysclk,
 345 };
 346
 347 static struct snd_soc_dai_ops wm8776_adc_ops = {
 348         .hw_params      = wm8776_hw_params,
 349         .set_fmt        = wm8776_set_fmt,
 350         .set_sysclk     = wm8776_set_sysclk,
 351 };
 352
 353 struct snd_soc_dai wm8776_dai[] = {
 354         {
 355                 .name = "WM8776 Playback",
 356                 .id = WM8776_DAI_DAC,
 357                 .playback = {
 358                         .stream_name = "Playback",
 359                         .channels_min = 2,
 360                         .channels_max = 2,
 361                         .rates = WM8776_RATES,
 362                         .formats = WM8776_FORMATS,
 363                 },
 364                 .ops = &wm8776_dac_ops,
 365         },
 366         {
 367                 .name = "WM8776 Capture",
 368                 .id = WM8776_DAI_ADC,
 369                 .capture = {
 370                         .stream_name = "Capture",
 371                         .channels_min = 2,
 372                         .channels_max = 2,
 373                         .rates = WM8776_RATES,
 374                         .formats = WM8776_FORMATS,
 375                 },
 376                 .ops = &wm8776_adc_ops,
 377         },
 378 };
 379 EXPORT_SYMBOL_GPL(wm8776_dai);
 380
 381 #ifdef CONFIG_PM
 382 static int wm8776_suspend(struct platform_device *pdev, pm_message_t state)
 383 {
 384         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 385         struct snd_soc_codec *codec = socdev->card->codec;
 386
 387         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 388
 389         return 0;
 390 }
 391
 392 static int wm8776_resume(struct platform_device *pdev)
 393 {
 394         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 395         struct snd_soc_codec *codec = socdev->card->codec;
 396         int i;
 397         u8 data[2];
 398         u16 *cache = codec->reg_cache;
 399
 400         /* Sync reg_cache with the hardware */
 401         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 402                 if (cache[i] == wm8776_reg[i])
 403                         continue;
 404                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 405                 data[1] = cache[i] & 0x00ff;
 406                 codec->hw_write(codec->control_data, data, 2);
 407         }
 408
 409         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 410
 411         return 0;
 412 }
 413 #else
 414 #define wm8776_suspend NULL
 415 #define wm8776_resume NULL
 416 #endif
 417
 418 static int wm8776_probe(struct platform_device *pdev)
 419 {
 420         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 421         struct snd_soc_codec *codec;
 422         int ret = 0;
 423
 424         if (wm8776_codec == NULL) {
 425                 dev_err(&pdev->dev, "Codec device not registered\n");
 426                 return -ENODEV;
 427         }
 428
 429         socdev->card->codec = wm8776_codec;
 430         codec = wm8776_codec;
 431
 432         /* register pcms */
 433         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 434         if (ret < 0) {
 435                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 436                 goto pcm_err;
 437         }
 438
 439         snd_soc_add_controls(codec, wm8776_snd_controls,
 440                              ARRAY_SIZE(wm8776_snd_controls));
 441         snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
 442                                   ARRAY_SIZE(wm8776_dapm_widgets));
 443         snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
 444
 445         return ret;
 446
 447 pcm_err:
 448         return ret;
 449 }
 450
 451 /* power down chip */
 452 static int wm8776_remove(struct platform_device *pdev)
 453 {
 454         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 455
 456         snd_soc_free_pcms(socdev);
 457         snd_soc_dapm_free(socdev);
 458
 459         return 0;
 460 }
 461
 462 struct snd_soc_codec_device soc_codec_dev_wm8776 = {
 463         .probe =        wm8776_probe,
 464         .remove =       wm8776_remove,
 465         .suspend =      wm8776_suspend,
 466         .resume =       wm8776_resume,
 467 };
 468 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
 469
 470 static int wm8776_register(struct wm8776_priv *wm8776,
 471                            enum snd_soc_control_type control)
 472 {
 473         int ret, i;
 474         struct snd_soc_codec *codec = &wm8776->codec;
 475
 476         if (wm8776_codec) {
 477                 dev_err(codec->dev, "Another WM8776 is registered\n");
 478                 ret = -EINVAL;
 479                 goto err;
 480         }
 481
 482         mutex_init(&codec->mutex);
 483         INIT_LIST_HEAD(&codec->dapm_widgets);
 484         INIT_LIST_HEAD(&codec->dapm_paths);
 485
 486         snd_soc_codec_set_drvdata(codec, wm8776);
 487         codec->name = "WM8776";
 488         codec->owner = THIS_MODULE;
 489         codec->bias_level = SND_SOC_BIAS_OFF;
 490         codec->set_bias_level = wm8776_set_bias_level;
 491         codec->dai = wm8776_dai;
 492         codec->num_dai = ARRAY_SIZE(wm8776_dai);
 493         codec->reg_cache_size = WM8776_CACHEREGNUM;
 494         codec->reg_cache = &wm8776->reg_cache;
 495
 496         memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
 497
 498         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
 499         if (ret < 0) {
 500                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 501                 goto err;
 502         }
 503
 504         for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
 505                 wm8776_dai[i].dev = codec->dev;
 506
 507         ret = wm8776_reset(codec);
 508         if (ret < 0) {
 509                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 510                 goto err;
 511         }
 512
 513         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 514
 515         /* Latch the update bits; right channel only since we always
 516          * update both. */
 517         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 518         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 519
 520         wm8776_codec = codec;
 521
 522         ret = snd_soc_register_codec(codec);
 523         if (ret != 0) {
 524                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 525                 goto err;
 526         }
 527
 528         ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 529         if (ret != 0) {
 530                 dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
 531                 goto err_codec;
 532         }
 533
 534         return 0;
 535
 536 err_codec:
 537         snd_soc_unregister_codec(codec);
 538 err:
 539         kfree(wm8776);
 540         return ret;
 541 }
 542
 543 static void wm8776_unregister(struct wm8776_priv *wm8776)
 544 {
 545         wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
 546         snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 547         snd_soc_unregister_codec(&wm8776->codec);
 548         kfree(wm8776);
 549         wm8776_codec = NULL;
 550 }
 551
 552 #if defined(CONFIG_SPI_MASTER)
 553 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
 554 {
 555         struct spi_transfer t;
 556         struct spi_message m;
 557         u8 msg[2];
 558
 559         if (len <= 0)
 560                 return 0;
 561
 562         msg[0] = data[0];
 563         msg[1] = data[1];
 564
 565         spi_message_init(&m);
 566         memset(&t, 0, (sizeof t));
 567
 568         t.tx_buf = &msg[0];
 569         t.len = len;
 570
 571         spi_message_add_tail(&t, &m);
 572         spi_sync(spi, &m);
 573
 574         return len;
 575 }
 576
 577 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 578 {
 579         struct snd_soc_codec *codec;
 580         struct wm8776_priv *wm8776;
 581
 582         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 583         if (wm8776 == NULL)
 584                 return -ENOMEM;
 585
 586         codec = &wm8776->codec;
 587         codec->control_data = spi;
 588         codec->hw_write = (hw_write_t)wm8776_spi_write;
 589         codec->dev = &spi->dev;
 590
 591         dev_set_drvdata(&spi->dev, wm8776);
 592
 593         return wm8776_register(wm8776, SND_SOC_SPI);
 594 }
 595
 596 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 597 {
 598         struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
 599
 600         wm8776_unregister(wm8776);
 601
 602         return 0;
 603 }
 604
 605 static struct spi_driver wm8776_spi_driver = {
 606         .driver = {
 607                 .name   = "wm8776",
 608                 .bus    = &spi_bus_type,
 609                 .owner  = THIS_MODULE,
 610         },
 611         .probe          = wm8776_spi_probe,
 612         .remove         = __devexit_p(wm8776_spi_remove),
 613 };
 614 #endif /* CONFIG_SPI_MASTER */
 615
 616 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 617 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 618                                       const struct i2c_device_id *id)
 619 {
 620         struct wm8776_priv *wm8776;
 621         struct snd_soc_codec *codec;
 622
 623         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 624         if (wm8776 == NULL)
 625                 return -ENOMEM;
 626
 627         codec = &wm8776->codec;
 628         codec->hw_write = (hw_write_t)i2c_master_send;
 629
 630         i2c_set_clientdata(i2c, wm8776);
 631         codec->control_data = i2c;
 632
 633         codec->dev = &i2c->dev;
 634
 635         return wm8776_register(wm8776, SND_SOC_I2C);
 636 }
 637
 638 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 639 {
 640         struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
 641         wm8776_unregister(wm8776);
 642         return 0;
 643 }
 644
 645 static const struct i2c_device_id wm8776_i2c_id[] = {
 646         { "wm8776", 0 },
 647         { }
 648 };
 649 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 650
 651 static struct i2c_driver wm8776_i2c_driver = {
 652         .driver = {
 653                 .name = "wm8776",
 654                 .owner = THIS_MODULE,
 655         },
 656         .probe =    wm8776_i2c_probe,
 657         .remove =   __devexit_p(wm8776_i2c_remove),
 658         .id_table = wm8776_i2c_id,
 659 };
 660 #endif
 661
 662 static int __init wm8776_modinit(void)
 663 {
 664         int ret;
 665 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 666         ret = i2c_add_driver(&wm8776_i2c_driver);
 667         if (ret != 0) {
 668                 printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
 669                        ret);
 670         }
 671 #endif
 672 #if defined(CONFIG_SPI_MASTER)
 673         ret = spi_register_driver(&wm8776_spi_driver);
 674         if (ret != 0) {
 675                 printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
 676                        ret);
 677         }
 678 #endif
 679         return 0;
 680 }
 681 module_init(wm8776_modinit);
 682
 683 static void __exit wm8776_exit(void)
 684 {
 685 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 686         i2c_del_driver(&wm8776_i2c_driver);
 687 #endif
 688 #if defined(CONFIG_SPI_MASTER)
 689         spi_unregister_driver(&wm8776_spi_driver);
 690 #endif
 691 }
 692 module_exit(wm8776_exit);
 693
 694 MODULE_DESCRIPTION("ASoC WM8776 driver");
 695 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 696 MODULE_LICENSE("GPL");