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 <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dapm.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30
  31 #include "wm8776.h"
  32
  33 static struct snd_soc_codec *wm8776_codec;
  34 struct snd_soc_codec_device soc_codec_dev_wm8776;
  35
  36 /* codec private data */
  37 struct wm8776_priv {
  38         struct snd_soc_codec codec;
  39         u16 reg_cache[WM8776_CACHEREGNUM];
  40         int sysclk[2];
  41 };
  42
  43 #ifdef CONFIG_SPI_MASTER
  44 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len);
  45 #endif
  46
  47 static const u16 wm8776_reg[WM8776_CACHEREGNUM] = {
  48         0x79, 0x79, 0x79, 0xff, 0xff,  /* 4 */
  49         0xff, 0x00, 0x90, 0x00, 0x00,  /* 9 */
  50         0x22, 0x22, 0x22, 0x08, 0xcf,  /* 14 */
  51         0xcf, 0x7b, 0x00, 0x32, 0x00,  /* 19 */
  52         0xa6, 0x01, 0x01
  53 };
  54
  55 static int wm8776_reset(struct snd_soc_codec *codec)
  56 {
  57         return snd_soc_write(codec, WM8776_RESET, 0);
  58 }
  59
  60 static const DECLARE_TLV_DB_SCALE(hp_tlv, -12100, 100, 1);
  61 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
  62 static const DECLARE_TLV_DB_SCALE(adc_tlv, -10350, 50, 1);
  63
  64 static const struct snd_kcontrol_new wm8776_snd_controls[] = {
  65 SOC_DOUBLE_R_TLV("Headphone Playback Volume", WM8776_HPLVOL, WM8776_HPRVOL,
  66                  0, 127, 0, hp_tlv),
  67 SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8776_DACLVOL, WM8776_DACRVOL,
  68                  0, 255, 0, dac_tlv),
  69 SOC_SINGLE("Digital Playback ZC Switch", WM8776_DACCTRL1, 0, 1, 0),
  70
  71 SOC_SINGLE("Deemphasis Switch", WM8776_DACCTRL2, 0, 1, 0),
  72
  73 SOC_DOUBLE_R_TLV("Capture Volume", WM8776_ADCLVOL, WM8776_ADCRVOL,
  74                  0, 255, 0, adc_tlv),
  75 SOC_DOUBLE("Capture Switch", WM8776_ADCMUX, 7, 6, 1, 1),
  76 SOC_DOUBLE_R("Capture ZC Switch", WM8776_ADCLVOL, WM8776_ADCRVOL, 8, 1, 0),
  77 SOC_SINGLE("Capture HPF Switch", WM8776_ADCIFCTRL, 8, 1, 1),
  78 };
  79
  80 static const struct snd_kcontrol_new inmix_controls[] = {
  81 SOC_DAPM_SINGLE("AIN1 Switch", WM8776_ADCMUX, 0, 1, 0),
  82 SOC_DAPM_SINGLE("AIN2 Switch", WM8776_ADCMUX, 1, 1, 0),
  83 SOC_DAPM_SINGLE("AIN3 Switch", WM8776_ADCMUX, 2, 1, 0),
  84 SOC_DAPM_SINGLE("AIN4 Switch", WM8776_ADCMUX, 3, 1, 0),
  85 SOC_DAPM_SINGLE("AIN5 Switch", WM8776_ADCMUX, 4, 1, 0),
  86 };
  87
  88 static const struct snd_kcontrol_new outmix_controls[] = {
  89 SOC_DAPM_SINGLE("DAC Switch", WM8776_OUTMUX, 0, 1, 0),
  90 SOC_DAPM_SINGLE("AUX Switch", WM8776_OUTMUX, 1, 1, 0),
  91 SOC_DAPM_SINGLE("Bypass Switch", WM8776_OUTMUX, 2, 1, 0),
  92 };
  93
  94 static const struct snd_soc_dapm_widget wm8776_dapm_widgets[] = {
  95 SND_SOC_DAPM_INPUT("AUX"),
  96
  97 SND_SOC_DAPM_INPUT("AIN1"),
  98 SND_SOC_DAPM_INPUT("AIN2"),
  99 SND_SOC_DAPM_INPUT("AIN3"),
 100 SND_SOC_DAPM_INPUT("AIN4"),
 101 SND_SOC_DAPM_INPUT("AIN5"),
 102
 103 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
 104                    inmix_controls, ARRAY_SIZE(inmix_controls)),
 105
 106 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 107 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 108
 109 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 110                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 111
 112 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 113
 114 SND_SOC_DAPM_OUTPUT("VOUT"),
 115
 116 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 117 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 118 };
 119
 120 static const struct snd_soc_dapm_route routes[] = {
 121         { "Input Mixer", "AIN1 Switch", "AIN1" },
 122         { "Input Mixer", "AIN2 Switch", "AIN2" },
 123         { "Input Mixer", "AIN3 Switch", "AIN3" },
 124         { "Input Mixer", "AIN4 Switch", "AIN4" },
 125         { "Input Mixer", "AIN5 Switch", "AIN5" },
 126
 127         { "ADC", NULL, "Input Mixer" },
 128
 129         { "Output Mixer", "DAC Switch", "DAC" },
 130         { "Output Mixer", "AUX Switch", "AUX" },
 131         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 132
 133         { "VOUT", NULL, "Output Mixer" },
 134
 135         { "Headphone PGA", NULL, "Output Mixer" },
 136
 137         { "HPOUTL", NULL, "Headphone PGA" },
 138         { "HPOUTR", NULL, "Headphone PGA" },
 139 };
 140
 141 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 142 {
 143         struct snd_soc_codec *codec = dai->codec;
 144         int reg, iface, master;
 145
 146         switch (dai->id) {
 147         case WM8776_DAI_DAC:
 148                 reg = WM8776_DACIFCTRL;
 149                 master = 0x80;
 150                 break;
 151         case WM8776_DAI_ADC:
 152                 reg = WM8776_ADCIFCTRL;
 153                 master = 0x100;
 154                 break;
 155         default:
 156                 return -EINVAL;
 157         }
 158
 159         iface = 0;
 160
 161         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 162         case SND_SOC_DAIFMT_CBM_CFM:
 163                 break;
 164         case SND_SOC_DAIFMT_CBS_CFS:
 165                 master = 0;
 166                 break;
 167         default:
 168                 return -EINVAL;
 169         }
 170
 171         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 172         case SND_SOC_DAIFMT_I2S:
 173                 iface |= 0x0002;
 174                 break;
 175         case SND_SOC_DAIFMT_RIGHT_J:
 176                 break;
 177         case SND_SOC_DAIFMT_LEFT_J:
 178                 iface |= 0x0001;
 179                 break;
 180         default:
 181                 return -EINVAL;
 182         }
 183
 184         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 185         case SND_SOC_DAIFMT_NB_NF:
 186                 break;
 187         case SND_SOC_DAIFMT_IB_IF:
 188                 iface |= 0x00c;
 189                 break;
 190         case SND_SOC_DAIFMT_IB_NF:
 191                 iface |= 0x008;
 192                 break;
 193         case SND_SOC_DAIFMT_NB_IF:
 194                 iface |= 0x004;
 195                 break;
 196         default:
 197                 return -EINVAL;
 198         }
 199
 200         /* Finally, write out the values */
 201         snd_soc_update_bits(codec, reg, 0xf, iface);
 202         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 203
 204         return 0;
 205 }
 206
 207 static int mclk_ratios[] = {
 208         128,
 209         192,
 210         256,
 211         384,
 212         512,
 213         768,
 214 };
 215
 216 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 217                             struct snd_pcm_hw_params *params,
 218                             struct snd_soc_dai *dai)
 219 {
 220         struct snd_soc_codec *codec = dai->codec;
 221         struct wm8776_priv *wm8776 = codec->private_data;
 222         int iface_reg, iface;
 223         int ratio_shift, master;
 224         int i;
 225
 226         iface = 0;
 227
 228         switch (dai->id) {
 229         case WM8776_DAI_DAC:
 230                 iface_reg = WM8776_DACIFCTRL;
 231                 master = 0x80;
 232                 ratio_shift = 4;
 233                 break;
 234         case WM8776_DAI_ADC:
 235                 iface_reg = WM8776_ADCIFCTRL;
 236                 master = 0x100;
 237                 ratio_shift = 0;
 238                 break;
 239         default:
 240                 return -EINVAL;
 241         }
 242
 243
 244         /* Set word length */
 245         switch (params_format(params)) {
 246         case SNDRV_PCM_FORMAT_S16_LE:
 247                 break;
 248         case SNDRV_PCM_FORMAT_S20_3LE:
 249                 iface |= 0x10;
 250                 break;
 251         case SNDRV_PCM_FORMAT_S24_LE:
 252                 iface |= 0x20;
 253                 break;
 254         case SNDRV_PCM_FORMAT_S32_LE:
 255                 iface |= 0x30;
 256                 break;
 257         }
 258
 259         /* Only need to set MCLK/LRCLK ratio if we're master */
 260         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 261                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 262                         if (wm8776->sysclk[dai->id] / params_rate(params)
 263                             == mclk_ratios[i])
 264                                 break;
 265                 }
 266
 267                 if (i == ARRAY_SIZE(mclk_ratios)) {
 268                         dev_err(codec->dev,
 269                                 "Unable to configure MCLK ratio %d/%d\n",
 270                                 wm8776->sysclk[dai->id], params_rate(params));
 271                         return -EINVAL;
 272                 }
 273
 274                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 275
 276                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 277                                     0x7 << ratio_shift, i << ratio_shift);
 278         } else {
 279                 dev_dbg(codec->dev, "DAI in slave mode\n");
 280         }
 281
 282         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 283
 284         return 0;
 285 }
 286
 287 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 288 {
 289         struct snd_soc_codec *codec = dai->codec;
 290
 291         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 292 }
 293
 294 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 295                              int clk_id, unsigned int freq, int dir)
 296 {
 297         struct snd_soc_codec *codec = dai->codec;
 298         struct wm8776_priv *wm8776 = codec->private_data;
 299
 300         BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
 301
 302         wm8776->sysclk[dai->id] = freq;
 303
 304         return 0;
 305 }
 306
 307 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 308                                  enum snd_soc_bias_level level)
 309 {
 310         switch (level) {
 311         case SND_SOC_BIAS_ON:
 312                 break;
 313         case SND_SOC_BIAS_PREPARE:
 314                 break;
 315         case SND_SOC_BIAS_STANDBY:
 316                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 317                         /* Disable the global powerdown; DAPM does the rest */
 318                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 319                 }
 320
 321                 break;
 322         case SND_SOC_BIAS_OFF:
 323                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 324                 break;
 325         }
 326
 327         codec->bias_level = level;
 328         return 0;
 329 }
 330
 331 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 332                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 333                       SNDRV_PCM_RATE_96000)
 334
 335
 336 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 337                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 338
 339 static struct snd_soc_dai_ops wm8776_dac_ops = {
 340         .digital_mute   = wm8776_mute,
 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_ops wm8776_adc_ops = {
 347         .hw_params      = wm8776_hw_params,
 348         .set_fmt        = wm8776_set_fmt,
 349         .set_sysclk     = wm8776_set_sysclk,
 350 };
 351
 352 struct snd_soc_dai wm8776_dai[] = {
 353         {
 354                 .name = "WM8776 Playback",
 355                 .id = WM8776_DAI_DAC,
 356                 .playback = {
 357                         .stream_name = "Playback",
 358                         .channels_min = 2,
 359                         .channels_max = 2,
 360                         .rates = WM8776_RATES,
 361                         .formats = WM8776_FORMATS,
 362                 },
 363                 .ops = &wm8776_dac_ops,
 364         },
 365         {
 366                 .name = "WM8776 Capture",
 367                 .id = WM8776_DAI_ADC,
 368                 .capture = {
 369                         .stream_name = "Capture",
 370                         .channels_min = 2,
 371                         .channels_max = 2,
 372                         .rates = WM8776_RATES,
 373                         .formats = WM8776_FORMATS,
 374                 },
 375                 .ops = &wm8776_adc_ops,
 376         },
 377 };
 378 EXPORT_SYMBOL_GPL(wm8776_dai);
 379
 380 #ifdef CONFIG_PM
 381 static int wm8776_suspend(struct platform_device *pdev, pm_message_t state)
 382 {
 383         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 384         struct snd_soc_codec *codec = socdev->card->codec;
 385
 386         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 387
 388         return 0;
 389 }
 390
 391 static int wm8776_resume(struct platform_device *pdev)
 392 {
 393         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 394         struct snd_soc_codec *codec = socdev->card->codec;
 395         int i;
 396         u8 data[2];
 397         u16 *cache = codec->reg_cache;
 398
 399         /* Sync reg_cache with the hardware */
 400         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 401                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 402                 data[1] = cache[i] & 0x00ff;
 403                 codec->hw_write(codec->control_data, data, 2);
 404         }
 405
 406         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 407
 408         return 0;
 409 }
 410 #else
 411 #define wm8776_suspend NULL
 412 #define wm8776_resume NULL
 413 #endif
 414
 415 static int wm8776_probe(struct platform_device *pdev)
 416 {
 417         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 418         struct snd_soc_codec *codec;
 419         int ret = 0;
 420
 421         if (wm8776_codec == NULL) {
 422                 dev_err(&pdev->dev, "Codec device not registered\n");
 423                 return -ENODEV;
 424         }
 425
 426         socdev->card->codec = wm8776_codec;
 427         codec = wm8776_codec;
 428
 429         /* register pcms */
 430         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 431         if (ret < 0) {
 432                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 433                 goto pcm_err;
 434         }
 435
 436         snd_soc_add_controls(codec, wm8776_snd_controls,
 437                              ARRAY_SIZE(wm8776_snd_controls));
 438         snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
 439                                   ARRAY_SIZE(wm8776_dapm_widgets));
 440         snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
 441
 442         ret = snd_soc_init_card(socdev);
 443         if (ret < 0) {
 444                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 445                 goto card_err;
 446         }
 447
 448         return ret;
 449
 450 card_err:
 451         snd_soc_free_pcms(socdev);
 452         snd_soc_dapm_free(socdev);
 453 pcm_err:
 454         return ret;
 455 }
 456
 457 /* power down chip */
 458 static int wm8776_remove(struct platform_device *pdev)
 459 {
 460         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 461
 462         snd_soc_free_pcms(socdev);
 463         snd_soc_dapm_free(socdev);
 464
 465         return 0;
 466 }
 467
 468 struct snd_soc_codec_device soc_codec_dev_wm8776 = {
 469         .probe =        wm8776_probe,
 470         .remove =       wm8776_remove,
 471         .suspend =      wm8776_suspend,
 472         .resume =       wm8776_resume,
 473 };
 474 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
 475
 476 static int wm8776_register(struct wm8776_priv *wm8776,
 477                            enum snd_soc_control_type control)
 478 {
 479         int ret, i;
 480         struct snd_soc_codec *codec = &wm8776->codec;
 481
 482         if (wm8776_codec) {
 483                 dev_err(codec->dev, "Another WM8776 is registered\n");
 484                 ret = -EINVAL;
 485                 goto err;
 486         }
 487
 488         mutex_init(&codec->mutex);
 489         INIT_LIST_HEAD(&codec->dapm_widgets);
 490         INIT_LIST_HEAD(&codec->dapm_paths);
 491
 492         codec->private_data = wm8776;
 493         codec->name = "WM8776";
 494         codec->owner = THIS_MODULE;
 495         codec->bias_level = SND_SOC_BIAS_OFF;
 496         codec->set_bias_level = wm8776_set_bias_level;
 497         codec->dai = wm8776_dai;
 498         codec->num_dai = ARRAY_SIZE(wm8776_dai);
 499         codec->reg_cache_size = WM8776_CACHEREGNUM;
 500         codec->reg_cache = &wm8776->reg_cache;
 501
 502         memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
 503
 504         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
 505         if (ret < 0) {
 506                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 507                 goto err;
 508         }
 509
 510         for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
 511                 wm8776_dai[i].dev = codec->dev;
 512
 513         ret = wm8776_reset(codec);
 514         if (ret < 0) {
 515                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 516                 goto err;
 517         }
 518
 519         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 520
 521         /* Latch the update bits; right channel only since we always
 522          * update both. */
 523         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 524         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 525
 526         wm8776_codec = codec;
 527
 528         ret = snd_soc_register_codec(codec);
 529         if (ret != 0) {
 530                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 531                 goto err;
 532         }
 533
 534         ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 535         if (ret != 0) {
 536                 dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
 537                 goto err_codec;
 538         }
 539
 540         return 0;
 541
 542 err_codec:
 543         snd_soc_unregister_codec(codec);
 544 err:
 545         kfree(wm8776);
 546         return ret;
 547 }
 548
 549 static void wm8776_unregister(struct wm8776_priv *wm8776)
 550 {
 551         wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
 552         snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 553         snd_soc_unregister_codec(&wm8776->codec);
 554         kfree(wm8776);
 555         wm8776_codec = NULL;
 556 }
 557
 558 #if defined(CONFIG_SPI_MASTER)
 559 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
 560 {
 561         struct spi_transfer t;
 562         struct spi_message m;
 563         u8 msg[2];
 564
 565         if (len <= 0)
 566                 return 0;
 567
 568         msg[0] = data[0];
 569         msg[1] = data[1];
 570
 571         spi_message_init(&m);
 572         memset(&t, 0, (sizeof t));
 573
 574         t.tx_buf = &msg[0];
 575         t.len = len;
 576
 577         spi_message_add_tail(&t, &m);
 578         spi_sync(spi, &m);
 579
 580         return len;
 581 }
 582
 583 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 584 {
 585         struct snd_soc_codec *codec;
 586         struct wm8776_priv *wm8776;
 587
 588         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 589         if (wm8776 == NULL)
 590                 return -ENOMEM;
 591
 592         codec = &wm8776->codec;
 593         codec->control_data = spi;
 594         codec->hw_write = (hw_write_t)wm8776_spi_write;
 595         codec->dev = &spi->dev;
 596
 597         dev_set_drvdata(&spi->dev, wm8776);
 598
 599         return wm8776_register(wm8776, SND_SOC_SPI);
 600 }
 601
 602 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 603 {
 604         struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
 605
 606         wm8776_unregister(wm8776);
 607
 608         return 0;
 609 }
 610
 611 #ifdef CONFIG_PM
 612 static int wm8776_spi_suspend(struct spi_device *spi, pm_message_t msg)
 613 {
 614         return snd_soc_suspend_device(&spi->dev);
 615 }
 616
 617 static int wm8776_spi_resume(struct spi_device *spi)
 618 {
 619         return snd_soc_resume_device(&spi->dev);
 620 }
 621 #else
 622 #define wm8776_spi_suspend NULL
 623 #define wm8776_spi_resume NULL
 624 #endif
 625
 626 static struct spi_driver wm8776_spi_driver = {
 627         .driver = {
 628                 .name   = "wm8776",
 629                 .bus    = &spi_bus_type,
 630                 .owner  = THIS_MODULE,
 631         },
 632         .probe          = wm8776_spi_probe,
 633         .suspend        = wm8776_spi_suspend,
 634         .resume         = wm8776_spi_resume,
 635         .remove         = __devexit_p(wm8776_spi_remove),
 636 };
 637 #endif /* CONFIG_SPI_MASTER */
 638
 639 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 640 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 641                                       const struct i2c_device_id *id)
 642 {
 643         struct wm8776_priv *wm8776;
 644         struct snd_soc_codec *codec;
 645
 646         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 647         if (wm8776 == NULL)
 648                 return -ENOMEM;
 649
 650         codec = &wm8776->codec;
 651         codec->hw_write = (hw_write_t)i2c_master_send;
 652
 653         i2c_set_clientdata(i2c, wm8776);
 654         codec->control_data = i2c;
 655
 656         codec->dev = &i2c->dev;
 657
 658         return wm8776_register(wm8776, SND_SOC_I2C);
 659 }
 660
 661 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 662 {
 663         struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
 664         wm8776_unregister(wm8776);
 665         return 0;
 666 }
 667
 668 #ifdef CONFIG_PM
 669 static int wm8776_i2c_suspend(struct i2c_client *i2c, pm_message_t msg)
 670 {
 671         return snd_soc_suspend_device(&i2c->dev);
 672 }
 673
 674 static int wm8776_i2c_resume(struct i2c_client *i2c)
 675 {
 676         return snd_soc_resume_device(&i2c->dev);
 677 }
 678 #else
 679 #define wm8776_i2c_suspend NULL
 680 #define wm8776_i2c_resume NULL
 681 #endif
 682
 683 static const struct i2c_device_id wm8776_i2c_id[] = {
 684         { "wm8776", 0 },
 685         { }
 686 };
 687 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 688
 689 static struct i2c_driver wm8776_i2c_driver = {
 690         .driver = {
 691                 .name = "wm8776",
 692                 .owner = THIS_MODULE,
 693         },
 694         .probe =    wm8776_i2c_probe,
 695         .remove =   __devexit_p(wm8776_i2c_remove),
 696         .suspend =  wm8776_i2c_suspend,
 697         .resume =   wm8776_i2c_resume,
 698         .id_table = wm8776_i2c_id,
 699 };
 700 #endif
 701
 702 static int __init wm8776_modinit(void)
 703 {
 704         int ret;
 705 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 706         ret = i2c_add_driver(&wm8776_i2c_driver);
 707         if (ret != 0) {
 708                 printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
 709                        ret);
 710         }
 711 #endif
 712 #if defined(CONFIG_SPI_MASTER)
 713         ret = spi_register_driver(&wm8776_spi_driver);
 714         if (ret != 0) {
 715                 printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
 716                        ret);
 717         }
 718 #endif
 719         return 0;
 720 }
 721 module_init(wm8776_modinit);
 722
 723 static void __exit wm8776_exit(void)
 724 {
 725 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 726         i2c_del_driver(&wm8776_i2c_driver);
 727 #endif
 728 #if defined(CONFIG_SPI_MASTER)
 729         spi_unregister_driver(&wm8776_spi_driver);
 730 #endif
 731 }
 732 module_exit(wm8776_exit);
 733
 734 MODULE_DESCRIPTION("ASoC WM8776 driver");
 735 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 736 MODULE_LICENSE("GPL");