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 SND_SOC_DAPM_INPUT("AUX"),
  98
  99 SND_SOC_DAPM_INPUT("AIN1"),
 100 SND_SOC_DAPM_INPUT("AIN2"),
 101 SND_SOC_DAPM_INPUT("AIN3"),
 102 SND_SOC_DAPM_INPUT("AIN4"),
 103 SND_SOC_DAPM_INPUT("AIN5"),
 104
 105 SND_SOC_DAPM_MIXER("Input Mixer", WM8776_PWRDOWN, 6, 1,
 106                    inmix_controls, ARRAY_SIZE(inmix_controls)),
 107
 108 SND_SOC_DAPM_ADC("ADC", "Capture", WM8776_PWRDOWN, 1, 1),
 109 SND_SOC_DAPM_DAC("DAC", "Playback", WM8776_PWRDOWN, 2, 1),
 110
 111 SND_SOC_DAPM_MIXER("Output Mixer", SND_SOC_NOPM, 0, 0,
 112                    outmix_controls, ARRAY_SIZE(outmix_controls)),
 113
 114 SND_SOC_DAPM_PGA("Headphone PGA", WM8776_PWRDOWN, 3, 1, NULL, 0),
 115
 116 SND_SOC_DAPM_OUTPUT("VOUT"),
 117
 118 SND_SOC_DAPM_OUTPUT("HPOUTL"),
 119 SND_SOC_DAPM_OUTPUT("HPOUTR"),
 120 };
 121
 122 static const struct snd_soc_dapm_route routes[] = {
 123         { "Input Mixer", "AIN1 Switch", "AIN1" },
 124         { "Input Mixer", "AIN2 Switch", "AIN2" },
 125         { "Input Mixer", "AIN3 Switch", "AIN3" },
 126         { "Input Mixer", "AIN4 Switch", "AIN4" },
 127         { "Input Mixer", "AIN5 Switch", "AIN5" },
 128
 129         { "ADC", NULL, "Input Mixer" },
 130
 131         { "Output Mixer", "DAC Switch", "DAC" },
 132         { "Output Mixer", "AUX Switch", "AUX" },
 133         { "Output Mixer", "Bypass Switch", "Input Mixer" },
 134
 135         { "VOUT", NULL, "Output Mixer" },
 136
 137         { "Headphone PGA", NULL, "Output Mixer" },
 138
 139         { "HPOUTL", NULL, "Headphone PGA" },
 140         { "HPOUTR", NULL, "Headphone PGA" },
 141 };
 142
 143 static int wm8776_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 144 {
 145         struct snd_soc_codec *codec = dai->codec;
 146         int reg, iface, master;
 147
 148         switch (dai->id) {
 149         case WM8776_DAI_DAC:
 150                 reg = WM8776_DACIFCTRL;
 151                 master = 0x80;
 152                 break;
 153         case WM8776_DAI_ADC:
 154                 reg = WM8776_ADCIFCTRL;
 155                 master = 0x100;
 156                 break;
 157         default:
 158                 return -EINVAL;
 159         }
 160
 161         iface = 0;
 162
 163         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 164         case SND_SOC_DAIFMT_CBM_CFM:
 165                 break;
 166         case SND_SOC_DAIFMT_CBS_CFS:
 167                 master = 0;
 168                 break;
 169         default:
 170                 return -EINVAL;
 171         }
 172
 173         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 174         case SND_SOC_DAIFMT_I2S:
 175                 iface |= 0x0002;
 176                 break;
 177         case SND_SOC_DAIFMT_RIGHT_J:
 178                 break;
 179         case SND_SOC_DAIFMT_LEFT_J:
 180                 iface |= 0x0001;
 181                 break;
 182                 /* FIXME: CHECK A/B */
 183         case SND_SOC_DAIFMT_DSP_A:
 184                 iface |= 0x0003;
 185                 break;
 186         case SND_SOC_DAIFMT_DSP_B:
 187                 iface |= 0x0007;
 188                 break;
 189         default:
 190                 return -EINVAL;
 191         }
 192
 193         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 194         case SND_SOC_DAIFMT_NB_NF:
 195                 break;
 196         case SND_SOC_DAIFMT_IB_IF:
 197                 iface |= 0x00c;
 198                 break;
 199         case SND_SOC_DAIFMT_IB_NF:
 200                 iface |= 0x008;
 201                 break;
 202         case SND_SOC_DAIFMT_NB_IF:
 203                 iface |= 0x004;
 204                 break;
 205         default:
 206                 return -EINVAL;
 207         }
 208
 209         /* Finally, write out the values */
 210         snd_soc_update_bits(codec, reg, 0xf, iface);
 211         snd_soc_update_bits(codec, WM8776_MSTRCTRL, 0x180, master);
 212
 213         return 0;
 214 }
 215
 216 static int mclk_ratios[] = {
 217         128,
 218         192,
 219         256,
 220         384,
 221         512,
 222         768,
 223 };
 224
 225 static int wm8776_hw_params(struct snd_pcm_substream *substream,
 226                             struct snd_pcm_hw_params *params,
 227                             struct snd_soc_dai *dai)
 228 {
 229         struct snd_soc_codec *codec = dai->codec;
 230         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 231         int iface_reg, iface;
 232         int ratio_shift, master;
 233         int i;
 234
 235         iface = 0;
 236
 237         switch (dai->id) {
 238         case WM8776_DAI_DAC:
 239                 iface_reg = WM8776_DACIFCTRL;
 240                 master = 0x80;
 241                 ratio_shift = 4;
 242                 break;
 243         case WM8776_DAI_ADC:
 244                 iface_reg = WM8776_ADCIFCTRL;
 245                 master = 0x100;
 246                 ratio_shift = 0;
 247                 break;
 248         default:
 249                 return -EINVAL;
 250         }
 251
 252
 253         /* Set word length */
 254         switch (params_format(params)) {
 255         case SNDRV_PCM_FORMAT_S16_LE:
 256                 break;
 257         case SNDRV_PCM_FORMAT_S20_3LE:
 258                 iface |= 0x10;
 259                 break;
 260         case SNDRV_PCM_FORMAT_S24_LE:
 261                 iface |= 0x20;
 262                 break;
 263         case SNDRV_PCM_FORMAT_S32_LE:
 264                 iface |= 0x30;
 265                 break;
 266         }
 267
 268         /* Only need to set MCLK/LRCLK ratio if we're master */
 269         if (snd_soc_read(codec, WM8776_MSTRCTRL) & master) {
 270                 for (i = 0; i < ARRAY_SIZE(mclk_ratios); i++) {
 271                         if (wm8776->sysclk[dai->id] / params_rate(params)
 272                             == mclk_ratios[i])
 273                                 break;
 274                 }
 275
 276                 if (i == ARRAY_SIZE(mclk_ratios)) {
 277                         dev_err(codec->dev,
 278                                 "Unable to configure MCLK ratio %d/%d\n",
 279                                 wm8776->sysclk[dai->id], params_rate(params));
 280                         return -EINVAL;
 281                 }
 282
 283                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 284
 285                 snd_soc_update_bits(codec, WM8776_MSTRCTRL,
 286                                     0x7 << ratio_shift, i << ratio_shift);
 287         } else {
 288                 dev_dbg(codec->dev, "DAI in slave mode\n");
 289         }
 290
 291         snd_soc_update_bits(codec, iface_reg, 0x30, iface);
 292
 293         return 0;
 294 }
 295
 296 static int wm8776_mute(struct snd_soc_dai *dai, int mute)
 297 {
 298         struct snd_soc_codec *codec = dai->codec;
 299
 300         return snd_soc_write(codec, WM8776_DACMUTE, !!mute);
 301 }
 302
 303 static int wm8776_set_sysclk(struct snd_soc_dai *dai,
 304                              int clk_id, unsigned int freq, int dir)
 305 {
 306         struct snd_soc_codec *codec = dai->codec;
 307         struct wm8776_priv *wm8776 = snd_soc_codec_get_drvdata(codec);
 308
 309         BUG_ON(dai->id >= ARRAY_SIZE(wm8776->sysclk));
 310
 311         wm8776->sysclk[dai->id] = freq;
 312
 313         return 0;
 314 }
 315
 316 static int wm8776_set_bias_level(struct snd_soc_codec *codec,
 317                                  enum snd_soc_bias_level level)
 318 {
 319         switch (level) {
 320         case SND_SOC_BIAS_ON:
 321                 break;
 322         case SND_SOC_BIAS_PREPARE:
 323                 break;
 324         case SND_SOC_BIAS_STANDBY:
 325                 if (codec->bias_level == SND_SOC_BIAS_OFF) {
 326                         /* Disable the global powerdown; DAPM does the rest */
 327                         snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 0);
 328                 }
 329
 330                 break;
 331         case SND_SOC_BIAS_OFF:
 332                 snd_soc_update_bits(codec, WM8776_PWRDOWN, 1, 1);
 333                 break;
 334         }
 335
 336         codec->bias_level = level;
 337         return 0;
 338 }
 339
 340 #define WM8776_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 341                       SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
 342                       SNDRV_PCM_RATE_96000)
 343
 344
 345 #define WM8776_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 346                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 347
 348 static struct snd_soc_dai_ops wm8776_dac_ops = {
 349         .digital_mute   = wm8776_mute,
 350         .hw_params      = wm8776_hw_params,
 351         .set_fmt        = wm8776_set_fmt,
 352         .set_sysclk     = wm8776_set_sysclk,
 353 };
 354
 355 static struct snd_soc_dai_ops wm8776_adc_ops = {
 356         .hw_params      = wm8776_hw_params,
 357         .set_fmt        = wm8776_set_fmt,
 358         .set_sysclk     = wm8776_set_sysclk,
 359 };
 360
 361 struct snd_soc_dai wm8776_dai[] = {
 362         {
 363                 .name = "WM8776 Playback",
 364                 .id = WM8776_DAI_DAC,
 365                 .playback = {
 366                         .stream_name = "Playback",
 367                         .channels_min = 2,
 368                         .channels_max = 2,
 369                         .rates = WM8776_RATES,
 370                         .formats = WM8776_FORMATS,
 371                 },
 372                 .ops = &wm8776_dac_ops,
 373         },
 374         {
 375                 .name = "WM8776 Capture",
 376                 .id = WM8776_DAI_ADC,
 377                 .capture = {
 378                         .stream_name = "Capture",
 379                         .channels_min = 2,
 380                         .channels_max = 2,
 381                         .rates = WM8776_RATES,
 382                         .formats = WM8776_FORMATS,
 383                 },
 384                 .ops = &wm8776_adc_ops,
 385         },
 386 };
 387 EXPORT_SYMBOL_GPL(wm8776_dai);
 388
 389 #ifdef CONFIG_PM
 390 static int wm8776_suspend(struct platform_device *pdev, pm_message_t state)
 391 {
 392         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 393         struct snd_soc_codec *codec = socdev->card->codec;
 394
 395         wm8776_set_bias_level(codec, SND_SOC_BIAS_OFF);
 396
 397         return 0;
 398 }
 399
 400 static int wm8776_resume(struct platform_device *pdev)
 401 {
 402         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 403         struct snd_soc_codec *codec = socdev->card->codec;
 404         int i;
 405         u8 data[2];
 406         u16 *cache = codec->reg_cache;
 407
 408         /* Sync reg_cache with the hardware */
 409         for (i = 0; i < ARRAY_SIZE(wm8776_reg); i++) {
 410                 if (cache[i] == wm8776_reg[i])
 411                         continue;
 412                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 413                 data[1] = cache[i] & 0x00ff;
 414                 codec->hw_write(codec->control_data, data, 2);
 415         }
 416
 417         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 418
 419         return 0;
 420 }
 421 #else
 422 #define wm8776_suspend NULL
 423 #define wm8776_resume NULL
 424 #endif
 425
 426 static int wm8776_probe(struct platform_device *pdev)
 427 {
 428         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 429         struct snd_soc_codec *codec;
 430         int ret = 0;
 431
 432         if (wm8776_codec == NULL) {
 433                 dev_err(&pdev->dev, "Codec device not registered\n");
 434                 return -ENODEV;
 435         }
 436
 437         socdev->card->codec = wm8776_codec;
 438         codec = wm8776_codec;
 439
 440         /* register pcms */
 441         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 442         if (ret < 0) {
 443                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 444                 goto pcm_err;
 445         }
 446
 447         snd_soc_add_controls(codec, wm8776_snd_controls,
 448                              ARRAY_SIZE(wm8776_snd_controls));
 449         snd_soc_dapm_new_controls(codec, wm8776_dapm_widgets,
 450                                   ARRAY_SIZE(wm8776_dapm_widgets));
 451         snd_soc_dapm_add_routes(codec, routes, ARRAY_SIZE(routes));
 452
 453         return ret;
 454
 455 pcm_err:
 456         return ret;
 457 }
 458
 459 /* power down chip */
 460 static int wm8776_remove(struct platform_device *pdev)
 461 {
 462         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 463
 464         snd_soc_free_pcms(socdev);
 465         snd_soc_dapm_free(socdev);
 466
 467         return 0;
 468 }
 469
 470 struct snd_soc_codec_device soc_codec_dev_wm8776 = {
 471         .probe =        wm8776_probe,
 472         .remove =       wm8776_remove,
 473         .suspend =      wm8776_suspend,
 474         .resume =       wm8776_resume,
 475 };
 476 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8776);
 477
 478 static int wm8776_register(struct wm8776_priv *wm8776,
 479                            enum snd_soc_control_type control)
 480 {
 481         int ret, i;
 482         struct snd_soc_codec *codec = &wm8776->codec;
 483
 484         if (wm8776_codec) {
 485                 dev_err(codec->dev, "Another WM8776 is registered\n");
 486                 ret = -EINVAL;
 487                 goto err;
 488         }
 489
 490         mutex_init(&codec->mutex);
 491         INIT_LIST_HEAD(&codec->dapm_widgets);
 492         INIT_LIST_HEAD(&codec->dapm_paths);
 493
 494         snd_soc_codec_set_drvdata(codec, wm8776);
 495         codec->name = "WM8776";
 496         codec->owner = THIS_MODULE;
 497         codec->bias_level = SND_SOC_BIAS_OFF;
 498         codec->set_bias_level = wm8776_set_bias_level;
 499         codec->dai = wm8776_dai;
 500         codec->num_dai = ARRAY_SIZE(wm8776_dai);
 501         codec->reg_cache_size = WM8776_CACHEREGNUM;
 502         codec->reg_cache = &wm8776->reg_cache;
 503
 504         memcpy(codec->reg_cache, wm8776_reg, sizeof(wm8776_reg));
 505
 506         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
 507         if (ret < 0) {
 508                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 509                 goto err;
 510         }
 511
 512         for (i = 0; i < ARRAY_SIZE(wm8776_dai); i++)
 513                 wm8776_dai[i].dev = codec->dev;
 514
 515         ret = wm8776_reset(codec);
 516         if (ret < 0) {
 517                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 518                 goto err;
 519         }
 520
 521         wm8776_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 522
 523         /* Latch the update bits; right channel only since we always
 524          * update both. */
 525         snd_soc_update_bits(codec, WM8776_HPRVOL, 0x100, 0x100);
 526         snd_soc_update_bits(codec, WM8776_DACRVOL, 0x100, 0x100);
 527
 528         wm8776_codec = codec;
 529
 530         ret = snd_soc_register_codec(codec);
 531         if (ret != 0) {
 532                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 533                 goto err;
 534         }
 535
 536         ret = snd_soc_register_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 537         if (ret != 0) {
 538                 dev_err(codec->dev, "Failed to register DAIs: %d\n", ret);
 539                 goto err_codec;
 540         }
 541
 542         return 0;
 543
 544 err_codec:
 545         snd_soc_unregister_codec(codec);
 546 err:
 547         kfree(wm8776);
 548         return ret;
 549 }
 550
 551 static void wm8776_unregister(struct wm8776_priv *wm8776)
 552 {
 553         wm8776_set_bias_level(&wm8776->codec, SND_SOC_BIAS_OFF);
 554         snd_soc_unregister_dais(wm8776_dai, ARRAY_SIZE(wm8776_dai));
 555         snd_soc_unregister_codec(&wm8776->codec);
 556         kfree(wm8776);
 557         wm8776_codec = NULL;
 558 }
 559
 560 #if defined(CONFIG_SPI_MASTER)
 561 static int wm8776_spi_write(struct spi_device *spi, const char *data, int len)
 562 {
 563         struct spi_transfer t;
 564         struct spi_message m;
 565         u8 msg[2];
 566
 567         if (len <= 0)
 568                 return 0;
 569
 570         msg[0] = data[0];
 571         msg[1] = data[1];
 572
 573         spi_message_init(&m);
 574         memset(&t, 0, (sizeof t));
 575
 576         t.tx_buf = &msg[0];
 577         t.len = len;
 578
 579         spi_message_add_tail(&t, &m);
 580         spi_sync(spi, &m);
 581
 582         return len;
 583 }
 584
 585 static int __devinit wm8776_spi_probe(struct spi_device *spi)
 586 {
 587         struct snd_soc_codec *codec;
 588         struct wm8776_priv *wm8776;
 589
 590         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 591         if (wm8776 == NULL)
 592                 return -ENOMEM;
 593
 594         codec = &wm8776->codec;
 595         codec->control_data = spi;
 596         codec->hw_write = (hw_write_t)wm8776_spi_write;
 597         codec->dev = &spi->dev;
 598
 599         dev_set_drvdata(&spi->dev, wm8776);
 600
 601         return wm8776_register(wm8776, SND_SOC_SPI);
 602 }
 603
 604 static int __devexit wm8776_spi_remove(struct spi_device *spi)
 605 {
 606         struct wm8776_priv *wm8776 = dev_get_drvdata(&spi->dev);
 607
 608         wm8776_unregister(wm8776);
 609
 610         return 0;
 611 }
 612
 613 static struct spi_driver wm8776_spi_driver = {
 614         .driver = {
 615                 .name   = "wm8776",
 616                 .bus    = &spi_bus_type,
 617                 .owner  = THIS_MODULE,
 618         },
 619         .probe          = wm8776_spi_probe,
 620         .remove         = __devexit_p(wm8776_spi_remove),
 621 };
 622 #endif /* CONFIG_SPI_MASTER */
 623
 624 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 625 static __devinit int wm8776_i2c_probe(struct i2c_client *i2c,
 626                                       const struct i2c_device_id *id)
 627 {
 628         struct wm8776_priv *wm8776;
 629         struct snd_soc_codec *codec;
 630
 631         wm8776 = kzalloc(sizeof(struct wm8776_priv), GFP_KERNEL);
 632         if (wm8776 == NULL)
 633                 return -ENOMEM;
 634
 635         codec = &wm8776->codec;
 636         codec->hw_write = (hw_write_t)i2c_master_send;
 637
 638         i2c_set_clientdata(i2c, wm8776);
 639         codec->control_data = i2c;
 640
 641         codec->dev = &i2c->dev;
 642
 643         return wm8776_register(wm8776, SND_SOC_I2C);
 644 }
 645
 646 static __devexit int wm8776_i2c_remove(struct i2c_client *client)
 647 {
 648         struct wm8776_priv *wm8776 = i2c_get_clientdata(client);
 649         wm8776_unregister(wm8776);
 650         return 0;
 651 }
 652
 653 static const struct i2c_device_id wm8776_i2c_id[] = {
 654         { "wm8776", 0 },
 655         { }
 656 };
 657 MODULE_DEVICE_TABLE(i2c, wm8776_i2c_id);
 658
 659 static struct i2c_driver wm8776_i2c_driver = {
 660         .driver = {
 661                 .name = "wm8776",
 662                 .owner = THIS_MODULE,
 663         },
 664         .probe =    wm8776_i2c_probe,
 665         .remove =   __devexit_p(wm8776_i2c_remove),
 666         .id_table = wm8776_i2c_id,
 667 };
 668 #endif
 669
 670 static int __init wm8776_modinit(void)
 671 {
 672         int ret;
 673 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 674         ret = i2c_add_driver(&wm8776_i2c_driver);
 675         if (ret != 0) {
 676                 printk(KERN_ERR "Failed to register WM8776 I2C driver: %d\n",
 677                        ret);
 678         }
 679 #endif
 680 #if defined(CONFIG_SPI_MASTER)
 681         ret = spi_register_driver(&wm8776_spi_driver);
 682         if (ret != 0) {
 683                 printk(KERN_ERR "Failed to register WM8776 SPI driver: %d\n",
 684                        ret);
 685         }
 686 #endif
 687         return 0;
 688 }
 689 module_init(wm8776_modinit);
 690
 691 static void __exit wm8776_exit(void)
 692 {
 693 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 694         i2c_del_driver(&wm8776_i2c_driver);
 695 #endif
 696 #if defined(CONFIG_SPI_MASTER)
 697         spi_unregister_driver(&wm8776_spi_driver);
 698 #endif
 699 }
 700 module_exit(wm8776_exit);
 701
 702 MODULE_DESCRIPTION("ASoC WM8776 driver");
 703 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 704 MODULE_LICENSE("GPL");