sound/soc/codecs/wm8711.c

   1 /*
   2  * wm8711.c  --  WM8711 ALSA SoC Audio driver
   3  *
   4  * Copyright 2006 Wolfson Microelectronics
   5  *
   6  * Author: Mike Arthur <linux@wolfsonmicro.com>
   7  *
   8  * Based on wm8731.c by Richard Purdie
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  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/tlv.h>
  29 #include <sound/initval.h>
  30
  31 #include "wm8711.h"
  32
  33 static struct snd_soc_codec *wm8711_codec;
  34
  35 /* codec private data */
  36 struct wm8711_priv {
  37         struct snd_soc_codec codec;
  38         u16 reg_cache[WM8711_CACHEREGNUM];
  39         unsigned int sysclk;
  40 };
  41
  42 /*
  43  * wm8711 register cache
  44  * We can't read the WM8711 register space when we are
  45  * using 2 wire for device control, so we cache them instead.
  46  * There is no point in caching the reset register
  47  */
  48 static const u16 wm8711_reg[WM8711_CACHEREGNUM] = {
  49         0x0079, 0x0079, 0x000a, 0x0008,
  50         0x009f, 0x000a, 0x0000, 0x0000
  51 };
  52
  53 #define wm8711_reset(c) snd_soc_write(c, WM8711_RESET, 0)
  54
  55 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
  56
  57 static const struct snd_kcontrol_new wm8711_snd_controls[] = {
  58
  59 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8711_LOUT1V, WM8711_ROUT1V,
  60                  0, 127, 0, out_tlv),
  61 SOC_DOUBLE_R("Master Playback ZC Switch", WM8711_LOUT1V, WM8711_ROUT1V,
  62         7, 1, 0),
  63
  64 };
  65
  66 /* Output Mixer */
  67 static const struct snd_kcontrol_new wm8711_output_mixer_controls[] = {
  68 SOC_DAPM_SINGLE("Line Bypass Switch", WM8711_APANA, 3, 1, 0),
  69 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8711_APANA, 4, 1, 0),
  70 };
  71
  72 static const struct snd_soc_dapm_widget wm8711_dapm_widgets[] = {
  73 SND_SOC_DAPM_MIXER("Output Mixer", WM8711_PWR, 4, 1,
  74         &wm8711_output_mixer_controls[0],
  75         ARRAY_SIZE(wm8711_output_mixer_controls)),
  76 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8711_PWR, 3, 1),
  77 SND_SOC_DAPM_OUTPUT("LOUT"),
  78 SND_SOC_DAPM_OUTPUT("LHPOUT"),
  79 SND_SOC_DAPM_OUTPUT("ROUT"),
  80 SND_SOC_DAPM_OUTPUT("RHPOUT"),
  81 };
  82
  83 static const struct snd_soc_dapm_route intercon[] = {
  84         /* output mixer */
  85         {"Output Mixer", "Line Bypass Switch", "Line Input"},
  86         {"Output Mixer", "HiFi Playback Switch", "DAC"},
  87
  88         /* outputs */
  89         {"RHPOUT", NULL, "Output Mixer"},
  90         {"ROUT", NULL, "Output Mixer"},
  91         {"LHPOUT", NULL, "Output Mixer"},
  92         {"LOUT", NULL, "Output Mixer"},
  93 };
  94
  95 static int wm8711_add_widgets(struct snd_soc_codec *codec)
  96 {
  97         snd_soc_dapm_new_controls(codec, wm8711_dapm_widgets,
  98                                   ARRAY_SIZE(wm8711_dapm_widgets));
  99
 100         snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
 101
 102         snd_soc_dapm_new_widgets(codec);
 103         return 0;
 104 }
 105
 106 struct _coeff_div {
 107         u32 mclk;
 108         u32 rate;
 109         u16 fs;
 110         u8 sr:4;
 111         u8 bosr:1;
 112         u8 usb:1;
 113 };
 114
 115 /* codec mclk clock divider coefficients */
 116 static const struct _coeff_div coeff_div[] = {
 117         /* 48k */
 118         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 119         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 120         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 121
 122         /* 32k */
 123         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 124         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 125         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 126
 127         /* 8k */
 128         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 129         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 130         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 131         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 132         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 133
 134         /* 96k */
 135         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 136         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 137         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 138
 139         /* 44.1k */
 140         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 141         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 142         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 143
 144         /* 88.2k */
 145         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 146         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 147         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 148 };
 149
 150 static inline int get_coeff(int mclk, int rate)
 151 {
 152         int i;
 153
 154         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 155                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 156                         return i;
 157         }
 158         return 0;
 159 }
 160
 161 static int wm8711_hw_params(struct snd_pcm_substream *substream,
 162         struct snd_pcm_hw_params *params,
 163         struct snd_soc_dai *dai)
 164 {
 165         struct snd_soc_codec *codec = dai->codec;
 166         struct wm8711_priv *wm8711 = codec->private_data;
 167         u16 iface = snd_soc_read(codec, WM8711_IFACE) & 0xfffc;
 168         int i = get_coeff(wm8711->sysclk, params_rate(params));
 169         u16 srate = (coeff_div[i].sr << 2) |
 170                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 171
 172         snd_soc_write(codec, WM8711_SRATE, srate);
 173
 174         /* bit size */
 175         switch (params_format(params)) {
 176         case SNDRV_PCM_FORMAT_S16_LE:
 177                 break;
 178         case SNDRV_PCM_FORMAT_S20_3LE:
 179                 iface |= 0x0004;
 180                 break;
 181         case SNDRV_PCM_FORMAT_S24_LE:
 182                 iface |= 0x0008;
 183                 break;
 184         }
 185
 186         snd_soc_write(codec, WM8711_IFACE, iface);
 187         return 0;
 188 }
 189
 190 static int wm8711_pcm_prepare(struct snd_pcm_substream *substream,
 191                               struct snd_soc_dai *dai)
 192 {
 193         struct snd_soc_codec *codec = dai->codec;
 194
 195         /* set active */
 196         snd_soc_write(codec, WM8711_ACTIVE, 0x0001);
 197
 198         return 0;
 199 }
 200
 201 static void wm8711_shutdown(struct snd_pcm_substream *substream,
 202                             struct snd_soc_dai *dai)
 203 {
 204         struct snd_soc_codec *codec = dai->codec;
 205
 206         /* deactivate */
 207         if (!codec->active) {
 208                 udelay(50);
 209                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 210         }
 211 }
 212
 213 static int wm8711_mute(struct snd_soc_dai *dai, int mute)
 214 {
 215         struct snd_soc_codec *codec = dai->codec;
 216         u16 mute_reg = snd_soc_read(codec, WM8711_APDIGI) & 0xfff7;
 217
 218         if (mute)
 219                 snd_soc_write(codec, WM8711_APDIGI, mute_reg | 0x8);
 220         else
 221                 snd_soc_write(codec, WM8711_APDIGI, mute_reg);
 222
 223         return 0;
 224 }
 225
 226 static int wm8711_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 227                 int clk_id, unsigned int freq, int dir)
 228 {
 229         struct snd_soc_codec *codec = codec_dai->codec;
 230         struct wm8711_priv *wm8711 = codec->private_data;
 231
 232         switch (freq) {
 233         case 11289600:
 234         case 12000000:
 235         case 12288000:
 236         case 16934400:
 237         case 18432000:
 238                 wm8711->sysclk = freq;
 239                 return 0;
 240         }
 241         return -EINVAL;
 242 }
 243
 244 static int wm8711_set_dai_fmt(struct snd_soc_dai *codec_dai,
 245                 unsigned int fmt)
 246 {
 247         struct snd_soc_codec *codec = codec_dai->codec;
 248         u16 iface = 0;
 249
 250         /* set master/slave audio interface */
 251         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 252         case SND_SOC_DAIFMT_CBM_CFM:
 253                 iface |= 0x0040;
 254                 break;
 255         case SND_SOC_DAIFMT_CBS_CFS:
 256                 break;
 257         default:
 258                 return -EINVAL;
 259         }
 260
 261         /* interface format */
 262         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 263         case SND_SOC_DAIFMT_I2S:
 264                 iface |= 0x0002;
 265                 break;
 266         case SND_SOC_DAIFMT_RIGHT_J:
 267                 break;
 268         case SND_SOC_DAIFMT_LEFT_J:
 269                 iface |= 0x0001;
 270                 break;
 271         case SND_SOC_DAIFMT_DSP_A:
 272                 iface |= 0x0003;
 273                 break;
 274         case SND_SOC_DAIFMT_DSP_B:
 275                 iface |= 0x0013;
 276                 break;
 277         default:
 278                 return -EINVAL;
 279         }
 280
 281         /* clock inversion */
 282         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 283         case SND_SOC_DAIFMT_NB_NF:
 284                 break;
 285         case SND_SOC_DAIFMT_IB_IF:
 286                 iface |= 0x0090;
 287                 break;
 288         case SND_SOC_DAIFMT_IB_NF:
 289                 iface |= 0x0080;
 290                 break;
 291         case SND_SOC_DAIFMT_NB_IF:
 292                 iface |= 0x0010;
 293                 break;
 294         default:
 295                 return -EINVAL;
 296         }
 297
 298         /* set iface */
 299         snd_soc_write(codec, WM8711_IFACE, iface);
 300         return 0;
 301 }
 302
 303
 304 static int wm8711_set_bias_level(struct snd_soc_codec *codec,
 305         enum snd_soc_bias_level level)
 306 {
 307         u16 reg = snd_soc_read(codec, WM8711_PWR) & 0xff7f;
 308
 309         switch (level) {
 310         case SND_SOC_BIAS_ON:
 311                 snd_soc_write(codec, WM8711_PWR, reg);
 312                 break;
 313         case SND_SOC_BIAS_PREPARE:
 314                 break;
 315         case SND_SOC_BIAS_STANDBY:
 316                 snd_soc_write(codec, WM8711_PWR, reg | 0x0040);
 317                 break;
 318         case SND_SOC_BIAS_OFF:
 319                 snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 320                 snd_soc_write(codec, WM8711_PWR, 0xffff);
 321                 break;
 322         }
 323         codec->bias_level = level;
 324         return 0;
 325 }
 326
 327 #define WM8711_RATES SNDRV_PCM_RATE_8000_96000
 328
 329 #define WM8711_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 330         SNDRV_PCM_FMTBIT_S24_LE)
 331
 332 static struct snd_soc_dai_ops wm8711_ops = {
 333         .prepare = wm8711_pcm_prepare,
 334         .hw_params = wm8711_hw_params,
 335         .shutdown = wm8711_shutdown,
 336         .digital_mute = wm8711_mute,
 337         .set_sysclk = wm8711_set_dai_sysclk,
 338         .set_fmt = wm8711_set_dai_fmt,
 339 };
 340
 341 struct snd_soc_dai wm8711_dai = {
 342         .name = "WM8711",
 343         .playback = {
 344                 .stream_name = "Playback",
 345                 .channels_min = 1,
 346                 .channels_max = 2,
 347                 .rates = WM8711_RATES,
 348                 .formats = WM8711_FORMATS,
 349         },
 350         .ops = &wm8711_ops,
 351 };
 352 EXPORT_SYMBOL_GPL(wm8711_dai);
 353
 354 static int wm8711_suspend(struct platform_device *pdev, pm_message_t state)
 355 {
 356         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 357         struct snd_soc_codec *codec = socdev->card->codec;
 358
 359         snd_soc_write(codec, WM8711_ACTIVE, 0x0);
 360         wm8711_set_bias_level(codec, SND_SOC_BIAS_OFF);
 361         return 0;
 362 }
 363
 364 static int wm8711_resume(struct platform_device *pdev)
 365 {
 366         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 367         struct snd_soc_codec *codec = socdev->card->codec;
 368         int i;
 369         u8 data[2];
 370         u16 *cache = codec->reg_cache;
 371
 372         /* Sync reg_cache with the hardware */
 373         for (i = 0; i < ARRAY_SIZE(wm8711_reg); i++) {
 374                 data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
 375                 data[1] = cache[i] & 0x00ff;
 376                 codec->hw_write(codec->control_data, data, 2);
 377         }
 378         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 379         wm8711_set_bias_level(codec, codec->suspend_bias_level);
 380         return 0;
 381 }
 382
 383 static int wm8711_probe(struct platform_device *pdev)
 384 {
 385         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 386         struct snd_soc_codec *codec;
 387         int ret = 0;
 388
 389         if (wm8711_codec == NULL) {
 390                 dev_err(&pdev->dev, "Codec device not registered\n");
 391                 return -ENODEV;
 392         }
 393
 394         socdev->card->codec = wm8711_codec;
 395         codec = wm8711_codec;
 396
 397         /* register pcms */
 398         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 399         if (ret < 0) {
 400                 dev_err(codec->dev, "failed to create pcms: %d\n", ret);
 401                 goto pcm_err;
 402         }
 403
 404         snd_soc_add_controls(codec, wm8711_snd_controls,
 405                              ARRAY_SIZE(wm8711_snd_controls));
 406         wm8711_add_widgets(codec);
 407         ret = snd_soc_init_card(socdev);
 408         if (ret < 0) {
 409                 dev_err(codec->dev, "failed to register card: %d\n", ret);
 410                 goto card_err;
 411         }
 412
 413         return ret;
 414
 415 card_err:
 416         snd_soc_free_pcms(socdev);
 417         snd_soc_dapm_free(socdev);
 418 pcm_err:
 419         return ret;
 420 }
 421
 422 /* power down chip */
 423 static int wm8711_remove(struct platform_device *pdev)
 424 {
 425         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 426
 427         snd_soc_free_pcms(socdev);
 428         snd_soc_dapm_free(socdev);
 429
 430         return 0;
 431 }
 432
 433 struct snd_soc_codec_device soc_codec_dev_wm8711 = {
 434         .probe =        wm8711_probe,
 435         .remove =       wm8711_remove,
 436         .suspend =      wm8711_suspend,
 437         .resume =       wm8711_resume,
 438 };
 439 EXPORT_SYMBOL_GPL(soc_codec_dev_wm8711);
 440
 441 static int wm8711_register(struct wm8711_priv *wm8711,
 442                            enum snd_soc_control_type control)
 443 {
 444         int ret;
 445         struct snd_soc_codec *codec = &wm8711->codec;
 446         u16 reg;
 447
 448         if (wm8711_codec) {
 449                 dev_err(codec->dev, "Another WM8711 is registered\n");
 450                 return -EINVAL;
 451         }
 452
 453         mutex_init(&codec->mutex);
 454         INIT_LIST_HEAD(&codec->dapm_widgets);
 455         INIT_LIST_HEAD(&codec->dapm_paths);
 456
 457         codec->private_data = wm8711;
 458         codec->name = "WM8711";
 459         codec->owner = THIS_MODULE;
 460         codec->bias_level = SND_SOC_BIAS_OFF;
 461         codec->set_bias_level = wm8711_set_bias_level;
 462         codec->dai = &wm8711_dai;
 463         codec->num_dai = 1;
 464         codec->reg_cache_size = WM8711_CACHEREGNUM;
 465         codec->reg_cache = &wm8711->reg_cache;
 466
 467         memcpy(codec->reg_cache, wm8711_reg, sizeof(wm8711_reg));
 468
 469         ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
 470         if (ret < 0) {
 471                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 472                 goto err;
 473         }
 474
 475         ret = wm8711_reset(codec);
 476         if (ret < 0) {
 477                 dev_err(codec->dev, "Failed to issue reset\n");
 478                 goto err;
 479         }
 480
 481         wm8711_dai.dev = codec->dev;
 482
 483         wm8711_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 484
 485         /* Latch the update bits */
 486         reg = snd_soc_read(codec, WM8711_LOUT1V);
 487         snd_soc_write(codec, WM8711_LOUT1V, reg | 0x0100);
 488         reg = snd_soc_read(codec, WM8711_ROUT1V);
 489         snd_soc_write(codec, WM8711_ROUT1V, reg | 0x0100);
 490
 491         wm8711_codec = codec;
 492
 493         ret = snd_soc_register_codec(codec);
 494         if (ret != 0) {
 495                 dev_err(codec->dev, "Failed to register codec: %d\n", ret);
 496                 goto err;
 497         }
 498
 499         ret = snd_soc_register_dai(&wm8711_dai);
 500         if (ret != 0) {
 501                 dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
 502                 goto err_codec;
 503         }
 504
 505         return 0;
 506
 507 err_codec:
 508         snd_soc_unregister_codec(codec);
 509 err:
 510         kfree(wm8711);
 511         return ret;
 512 }
 513
 514 static void wm8711_unregister(struct wm8711_priv *wm8711)
 515 {
 516         wm8711_set_bias_level(&wm8711->codec, SND_SOC_BIAS_OFF);
 517         snd_soc_unregister_dai(&wm8711_dai);
 518         snd_soc_unregister_codec(&wm8711->codec);
 519         kfree(wm8711);
 520         wm8711_codec = NULL;
 521 }
 522
 523 #if defined(CONFIG_SPI_MASTER)
 524 static int __devinit wm8711_spi_probe(struct spi_device *spi)
 525 {
 526         struct snd_soc_codec *codec;
 527         struct wm8711_priv *wm8711;
 528
 529         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 530         if (wm8711 == NULL)
 531                 return -ENOMEM;
 532
 533         codec = &wm8711->codec;
 534         codec->control_data = spi;
 535         codec->dev = &spi->dev;
 536
 537         dev_set_drvdata(&spi->dev, wm8711);
 538
 539         return wm8711_register(wm8711, SND_SOC_SPI);
 540 }
 541
 542 static int __devexit wm8711_spi_remove(struct spi_device *spi)
 543 {
 544         struct wm8711_priv *wm8711 = dev_get_drvdata(&spi->dev);
 545
 546         wm8711_unregister(wm8711);
 547
 548         return 0;
 549 }
 550
 551 #ifdef CONFIG_PM
 552 static int wm8711_spi_suspend(struct spi_device *spi, pm_message_t msg)
 553 {
 554         return snd_soc_suspend_device(&spi->dev);
 555 }
 556
 557 static int wm8711_spi_resume(struct spi_device *spi)
 558 {
 559         return snd_soc_resume_device(&spi->dev);
 560 }
 561 #else
 562 #define wm8711_spi_suspend NULL
 563 #define wm8711_spi_resume NULL
 564 #endif
 565
 566 static struct spi_driver wm8711_spi_driver = {
 567         .driver = {
 568                 .name   = "wm8711",
 569                 .bus    = &spi_bus_type,
 570                 .owner  = THIS_MODULE,
 571         },
 572         .probe          = wm8711_spi_probe,
 573         .suspend        = wm8711_spi_suspend,
 574         .resume         = wm8711_spi_resume,
 575         .remove         = __devexit_p(wm8711_spi_remove),
 576 };
 577 #endif /* CONFIG_SPI_MASTER */
 578
 579 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 580 static __devinit int wm8711_i2c_probe(struct i2c_client *i2c,
 581                                       const struct i2c_device_id *id)
 582 {
 583         struct wm8711_priv *wm8711;
 584         struct snd_soc_codec *codec;
 585
 586         wm8711 = kzalloc(sizeof(struct wm8711_priv), GFP_KERNEL);
 587         if (wm8711 == NULL)
 588                 return -ENOMEM;
 589
 590         codec = &wm8711->codec;
 591         codec->hw_write = (hw_write_t)i2c_master_send;
 592
 593         i2c_set_clientdata(i2c, wm8711);
 594         codec->control_data = i2c;
 595
 596         codec->dev = &i2c->dev;
 597
 598         return wm8711_register(wm8711, SND_SOC_I2C);
 599 }
 600
 601 static __devexit int wm8711_i2c_remove(struct i2c_client *client)
 602 {
 603         struct wm8711_priv *wm8711 = i2c_get_clientdata(client);
 604         wm8711_unregister(wm8711);
 605         return 0;
 606 }
 607
 608 static const struct i2c_device_id wm8711_i2c_id[] = {
 609         { "wm8711", 0 },
 610         { }
 611 };
 612 MODULE_DEVICE_TABLE(i2c, wm8711_i2c_id);
 613
 614 static struct i2c_driver wm8711_i2c_driver = {
 615         .driver = {
 616                 .name = "WM8711 I2C Codec",
 617                 .owner = THIS_MODULE,
 618         },
 619         .probe =    wm8711_i2c_probe,
 620         .remove =   __devexit_p(wm8711_i2c_remove),
 621         .id_table = wm8711_i2c_id,
 622 };
 623 #endif
 624
 625 static int __init wm8711_modinit(void)
 626 {
 627         int ret;
 628 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 629         ret = i2c_add_driver(&wm8711_i2c_driver);
 630         if (ret != 0) {
 631                 printk(KERN_ERR "Failed to register WM8711 I2C driver: %d\n",
 632                        ret);
 633         }
 634 #endif
 635 #if defined(CONFIG_SPI_MASTER)
 636         ret = spi_register_driver(&wm8711_spi_driver);
 637         if (ret != 0) {
 638                 printk(KERN_ERR "Failed to register WM8711 SPI driver: %d\n",
 639                        ret);
 640         }
 641 #endif
 642         return 0;
 643 }
 644 module_init(wm8711_modinit);
 645
 646 static void __exit wm8711_exit(void)
 647 {
 648 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 649         i2c_del_driver(&wm8711_i2c_driver);
 650 #endif
 651 #if defined(CONFIG_SPI_MASTER)
 652         spi_unregister_driver(&wm8711_spi_driver);
 653 #endif
 654 }
 655 module_exit(wm8711_exit);
 656
 657 MODULE_DESCRIPTION("ASoC WM8711 driver");
 658 MODULE_AUTHOR("Mike Arthur");
 659 MODULE_LICENSE("GPL");