sound/soc/codecs/wm8731.c

   1 /*
   2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on wm8753.c by Liam Girdwood
   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/slab.h>
  22 #include <linux/regmap.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/spi/spi.h>
  25 #include <linux/of_device.h>
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include <sound/soc.h>
  30 #include <sound/initval.h>
  31 #include <sound/tlv.h>
  32
  33 #include "wm8731.h"
  34
  35 #define WM8731_NUM_SUPPLIES 4
  36 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  37         "AVDD",
  38         "HPVDD",
  39         "DCVDD",
  40         "DBVDD",
  41 };
  42
  43 /* codec private data */
  44 struct wm8731_priv {
  45         struct regmap *regmap;
  46         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  47         unsigned int sysclk;
  48         int sysclk_type;
  49         int playback_fs;
  50         bool deemph;
  51 };
  52
  53
  54 /*
  55  * wm8731 register cache
  56  */
  57 static const struct reg_default wm8731_reg_defaults[] = {
  58         { 0, 0x0097 },
  59         { 1, 0x0097 },
  60         { 2, 0x0079 },
  61         { 3, 0x0079 },
  62         { 4, 0x000a },
  63         { 5, 0x0008 },
  64         { 6, 0x009f },
  65         { 7, 0x000a },
  66         { 8, 0x0000 },
  67         { 9, 0x0000 },
  68 };
  69
  70 static bool wm8731_volatile(struct device *dev, unsigned int reg)
  71 {
  72         return reg == WM8731_RESET;
  73 }
  74
  75 static bool wm8731_writeable(struct device *dev, unsigned int reg)
  76 {
  77         return reg <= WM8731_RESET;
  78 }
  79
  80 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  81
  82 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  83
  84 static const struct soc_enum wm8731_insel_enum =
  85         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
  86
  87 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  88
  89 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  90 {
  91         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  92         int val, i, best;
  93
  94         /* If we're using deemphasis select the nearest available sample
  95          * rate.
  96          */
  97         if (wm8731->deemph) {
  98                 best = 1;
  99                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
 100                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
 101                             abs(wm8731_deemph[best] - wm8731->playback_fs))
 102                                 best = i;
 103                 }
 104
 105                 val = best << 1;
 106         } else {
 107                 best = 0;
 108                 val = 0;
 109         }
 110
 111         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
 112                 best, wm8731_deemph[best]);
 113
 114         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 115 }
 116
 117 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 118                              struct snd_ctl_elem_value *ucontrol)
 119 {
 120         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 121         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 122
 123         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 124
 125         return 0;
 126 }
 127
 128 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 129                              struct snd_ctl_elem_value *ucontrol)
 130 {
 131         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 132         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 133         int deemph = ucontrol->value.enumerated.item[0];
 134         int ret = 0;
 135
 136         if (deemph > 1)
 137                 return -EINVAL;
 138
 139         mutex_lock(&codec->mutex);
 140         if (wm8731->deemph != deemph) {
 141                 wm8731->deemph = deemph;
 142
 143                 wm8731_set_deemph(codec);
 144
 145                 ret = 1;
 146         }
 147         mutex_unlock(&codec->mutex);
 148
 149         return ret;
 150 }
 151
 152 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 153 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 154 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 155 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 156
 157 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 158
 159 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 160                  0, 127, 0, out_tlv),
 161 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 162         7, 1, 0),
 163
 164 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 165                  in_tlv),
 166 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 167
 168 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 169 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 170
 171 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 172                sidetone_tlv),
 173
 174 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 175 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 176
 177 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 178                     wm8731_get_deemph, wm8731_put_deemph),
 179 };
 180
 181 /* Output Mixer */
 182 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 183 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 184 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 185 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 186 };
 187
 188 /* Input mux */
 189 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 190 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 191
 192 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 193 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 194 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 195 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 196         &wm8731_output_mixer_controls[0],
 197         ARRAY_SIZE(wm8731_output_mixer_controls)),
 198 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 199 SND_SOC_DAPM_OUTPUT("LOUT"),
 200 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 201 SND_SOC_DAPM_OUTPUT("ROUT"),
 202 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 203 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 204 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 205 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 206 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 207 SND_SOC_DAPM_INPUT("MICIN"),
 208 SND_SOC_DAPM_INPUT("RLINEIN"),
 209 SND_SOC_DAPM_INPUT("LLINEIN"),
 210 };
 211
 212 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 213                             struct snd_soc_dapm_widget *sink)
 214 {
 215         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 216
 217         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 218 }
 219
 220 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 221         {"DAC", NULL, "OSC", wm8731_check_osc},
 222         {"ADC", NULL, "OSC", wm8731_check_osc},
 223         {"DAC", NULL, "ACTIVE"},
 224         {"ADC", NULL, "ACTIVE"},
 225
 226         /* output mixer */
 227         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 228         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 229         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 230
 231         /* outputs */
 232         {"RHPOUT", NULL, "Output Mixer"},
 233         {"ROUT", NULL, "Output Mixer"},
 234         {"LHPOUT", NULL, "Output Mixer"},
 235         {"LOUT", NULL, "Output Mixer"},
 236
 237         /* input mux */
 238         {"Input Mux", "Line In", "Line Input"},
 239         {"Input Mux", "Mic", "Mic Bias"},
 240         {"ADC", NULL, "Input Mux"},
 241
 242         /* inputs */
 243         {"Line Input", NULL, "LLINEIN"},
 244         {"Line Input", NULL, "RLINEIN"},
 245         {"Mic Bias", NULL, "MICIN"},
 246 };
 247
 248 struct _coeff_div {
 249         u32 mclk;
 250         u32 rate;
 251         u16 fs;
 252         u8 sr:4;
 253         u8 bosr:1;
 254         u8 usb:1;
 255 };
 256
 257 /* codec mclk clock divider coefficients */
 258 static const struct _coeff_div coeff_div[] = {
 259         /* 48k */
 260         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 261         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 262         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 263
 264         /* 32k */
 265         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 266         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 267         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 268
 269         /* 8k */
 270         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 271         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 272         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 273         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 274         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 275
 276         /* 96k */
 277         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 278         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 279         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 280
 281         /* 44.1k */
 282         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 283         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 284         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 285
 286         /* 88.2k */
 287         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 288         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 289         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 290 };
 291
 292 static inline int get_coeff(int mclk, int rate)
 293 {
 294         int i;
 295
 296         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 297                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 298                         return i;
 299         }
 300         return 0;
 301 }
 302
 303 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 304                             struct snd_pcm_hw_params *params,
 305                             struct snd_soc_dai *dai)
 306 {
 307         struct snd_soc_codec *codec = dai->codec;
 308         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 309         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 310         int i = get_coeff(wm8731->sysclk, params_rate(params));
 311         u16 srate = (coeff_div[i].sr << 2) |
 312                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 313
 314         wm8731->playback_fs = params_rate(params);
 315
 316         snd_soc_write(codec, WM8731_SRATE, srate);
 317
 318         /* bit size */
 319         switch (params_format(params)) {
 320         case SNDRV_PCM_FORMAT_S16_LE:
 321                 break;
 322         case SNDRV_PCM_FORMAT_S20_3LE:
 323                 iface |= 0x0004;
 324                 break;
 325         case SNDRV_PCM_FORMAT_S24_LE:
 326                 iface |= 0x0008;
 327                 break;
 328         }
 329
 330         wm8731_set_deemph(codec);
 331
 332         snd_soc_write(codec, WM8731_IFACE, iface);
 333         return 0;
 334 }
 335
 336 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 337 {
 338         struct snd_soc_codec *codec = dai->codec;
 339         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 340
 341         if (mute)
 342                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 343         else
 344                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 345         return 0;
 346 }
 347
 348 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 349                 int clk_id, unsigned int freq, int dir)
 350 {
 351         struct snd_soc_codec *codec = codec_dai->codec;
 352         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 353
 354         switch (clk_id) {
 355         case WM8731_SYSCLK_XTAL:
 356         case WM8731_SYSCLK_MCLK:
 357                 wm8731->sysclk_type = clk_id;
 358                 break;
 359         default:
 360                 return -EINVAL;
 361         }
 362
 363         switch (freq) {
 364         case 11289600:
 365         case 12000000:
 366         case 12288000:
 367         case 16934400:
 368         case 18432000:
 369                 wm8731->sysclk = freq;
 370                 break;
 371         default:
 372                 return -EINVAL;
 373         }
 374
 375         snd_soc_dapm_sync(&codec->dapm);
 376
 377         return 0;
 378 }
 379
 380
 381 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 382                 unsigned int fmt)
 383 {
 384         struct snd_soc_codec *codec = codec_dai->codec;
 385         u16 iface = 0;
 386
 387         /* set master/slave audio interface */
 388         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 389         case SND_SOC_DAIFMT_CBM_CFM:
 390                 iface |= 0x0040;
 391                 break;
 392         case SND_SOC_DAIFMT_CBS_CFS:
 393                 break;
 394         default:
 395                 return -EINVAL;
 396         }
 397
 398         /* interface format */
 399         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 400         case SND_SOC_DAIFMT_I2S:
 401                 iface |= 0x0002;
 402                 break;
 403         case SND_SOC_DAIFMT_RIGHT_J:
 404                 break;
 405         case SND_SOC_DAIFMT_LEFT_J:
 406                 iface |= 0x0001;
 407                 break;
 408         case SND_SOC_DAIFMT_DSP_A:
 409                 iface |= 0x0003;
 410                 break;
 411         case SND_SOC_DAIFMT_DSP_B:
 412                 iface |= 0x0013;
 413                 break;
 414         default:
 415                 return -EINVAL;
 416         }
 417
 418         /* clock inversion */
 419         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 420         case SND_SOC_DAIFMT_NB_NF:
 421                 break;
 422         case SND_SOC_DAIFMT_IB_IF:
 423                 iface |= 0x0090;
 424                 break;
 425         case SND_SOC_DAIFMT_IB_NF:
 426                 iface |= 0x0080;
 427                 break;
 428         case SND_SOC_DAIFMT_NB_IF:
 429                 iface |= 0x0010;
 430                 break;
 431         default:
 432                 return -EINVAL;
 433         }
 434
 435         /* set iface */
 436         snd_soc_write(codec, WM8731_IFACE, iface);
 437         return 0;
 438 }
 439
 440 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 441                                  enum snd_soc_bias_level level)
 442 {
 443         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 444         int ret;
 445         u16 reg;
 446
 447         switch (level) {
 448         case SND_SOC_BIAS_ON:
 449                 break;
 450         case SND_SOC_BIAS_PREPARE:
 451                 break;
 452         case SND_SOC_BIAS_STANDBY:
 453                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 454                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 455                                                     wm8731->supplies);
 456                         if (ret != 0)
 457                                 return ret;
 458
 459                         regcache_sync(wm8731->regmap);
 460                 }
 461
 462                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 463                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 464                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 465                 break;
 466         case SND_SOC_BIAS_OFF:
 467                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 468                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 469                                        wm8731->supplies);
 470                 regcache_mark_dirty(wm8731->regmap);
 471                 break;
 472         }
 473         codec->dapm.bias_level = level;
 474         return 0;
 475 }
 476
 477 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 478
 479 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 480         SNDRV_PCM_FMTBIT_S24_LE)
 481
 482 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 483         .hw_params      = wm8731_hw_params,
 484         .digital_mute   = wm8731_mute,
 485         .set_sysclk     = wm8731_set_dai_sysclk,
 486         .set_fmt        = wm8731_set_dai_fmt,
 487 };
 488
 489 static struct snd_soc_dai_driver wm8731_dai = {
 490         .name = "wm8731-hifi",
 491         .playback = {
 492                 .stream_name = "Playback",
 493                 .channels_min = 1,
 494                 .channels_max = 2,
 495                 .rates = WM8731_RATES,
 496                 .formats = WM8731_FORMATS,},
 497         .capture = {
 498                 .stream_name = "Capture",
 499                 .channels_min = 1,
 500                 .channels_max = 2,
 501                 .rates = WM8731_RATES,
 502                 .formats = WM8731_FORMATS,},
 503         .ops = &wm8731_dai_ops,
 504         .symmetric_rates = 1,
 505 };
 506
 507 #ifdef CONFIG_PM
 508 static int wm8731_suspend(struct snd_soc_codec *codec)
 509 {
 510         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 511
 512         return 0;
 513 }
 514
 515 static int wm8731_resume(struct snd_soc_codec *codec)
 516 {
 517         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 518
 519         return 0;
 520 }
 521 #else
 522 #define wm8731_suspend NULL
 523 #define wm8731_resume NULL
 524 #endif
 525
 526 static int wm8731_probe(struct snd_soc_codec *codec)
 527 {
 528         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 529         int ret = 0, i;
 530
 531         codec->control_data = wm8731->regmap;
 532         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
 533         if (ret < 0) {
 534                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 535                 return ret;
 536         }
 537
 538         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 539                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 540
 541         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 542                                  wm8731->supplies);
 543         if (ret != 0) {
 544                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 545                 return ret;
 546         }
 547
 548         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 549                                     wm8731->supplies);
 550         if (ret != 0) {
 551                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 552                 goto err_regulator_get;
 553         }
 554
 555         ret = wm8731_reset(codec);
 556         if (ret < 0) {
 557                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 558                 goto err_regulator_enable;
 559         }
 560
 561         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 562
 563         /* Latch the update bits */
 564         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 565         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 566         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 567         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 568
 569         /* Disable bypass path by default */
 570         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 571
 572         /* Regulators will have been enabled by bias management */
 573         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 574
 575         return 0;
 576
 577 err_regulator_enable:
 578         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 579 err_regulator_get:
 580         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 581
 582         return ret;
 583 }
 584
 585 /* power down chip */
 586 static int wm8731_remove(struct snd_soc_codec *codec)
 587 {
 588         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 589
 590         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 591
 592         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 593         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 594
 595         return 0;
 596 }
 597
 598 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 599         .probe =        wm8731_probe,
 600         .remove =       wm8731_remove,
 601         .suspend =      wm8731_suspend,
 602         .resume =       wm8731_resume,
 603         .set_bias_level = wm8731_set_bias_level,
 604         .dapm_widgets = wm8731_dapm_widgets,
 605         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 606         .dapm_routes = wm8731_intercon,
 607         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 608         .controls =     wm8731_snd_controls,
 609         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
 610 };
 611
 612 static const struct of_device_id wm8731_of_match[] = {
 613         { .compatible = "wlf,wm8731", },
 614         { }
 615 };
 616
 617 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 618
 619 static const struct regmap_config wm8731_regmap = {
 620         .reg_bits = 7,
 621         .val_bits = 9,
 622
 623         .max_register = WM8731_RESET,
 624         .volatile_reg = wm8731_volatile,
 625         .writeable_reg = wm8731_writeable,
 626
 627         .cache_type = REGCACHE_RBTREE,
 628         .reg_defaults = wm8731_reg_defaults,
 629         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 630 };
 631
 632 #if defined(CONFIG_SPI_MASTER)
 633 static int __devinit wm8731_spi_probe(struct spi_device *spi)
 634 {
 635         struct wm8731_priv *wm8731;
 636         int ret;
 637
 638         wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv),
 639                               GFP_KERNEL);
 640         if (wm8731 == NULL)
 641                 return -ENOMEM;
 642
 643         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 644         if (IS_ERR(wm8731->regmap)) {
 645                 ret = PTR_ERR(wm8731->regmap);
 646                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 647                         ret);
 648                 return ret;
 649         }
 650
 651         spi_set_drvdata(spi, wm8731);
 652
 653         ret = snd_soc_register_codec(&spi->dev,
 654                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 655         if (ret != 0) {
 656                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 657                 return ret;
 658         }
 659
 660         return 0;
 661 }
 662
 663 static int __devexit wm8731_spi_remove(struct spi_device *spi)
 664 {
 665         snd_soc_unregister_codec(&spi->dev);
 666         return 0;
 667 }
 668
 669 static struct spi_driver wm8731_spi_driver = {
 670         .driver = {
 671                 .name   = "wm8731",
 672                 .owner  = THIS_MODULE,
 673                 .of_match_table = wm8731_of_match,
 674         },
 675         .probe          = wm8731_spi_probe,
 676         .remove         = __devexit_p(wm8731_spi_remove),
 677 };
 678 #endif /* CONFIG_SPI_MASTER */
 679
 680 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 681 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
 682                                       const struct i2c_device_id *id)
 683 {
 684         struct wm8731_priv *wm8731;
 685         int ret;
 686
 687         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 688                               GFP_KERNEL);
 689         if (wm8731 == NULL)
 690                 return -ENOMEM;
 691
 692         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 693         if (IS_ERR(wm8731->regmap)) {
 694                 ret = PTR_ERR(wm8731->regmap);
 695                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 696                         ret);
 697                 return ret;
 698         }
 699
 700         i2c_set_clientdata(i2c, wm8731);
 701
 702         ret = snd_soc_register_codec(&i2c->dev,
 703                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 704         if (ret != 0) {
 705                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 706                 return ret;
 707         }
 708
 709         return 0;
 710 }
 711
 712 static __devexit int wm8731_i2c_remove(struct i2c_client *client)
 713 {
 714         snd_soc_unregister_codec(&client->dev);
 715         return 0;
 716 }
 717
 718 static const struct i2c_device_id wm8731_i2c_id[] = {
 719         { "wm8731", 0 },
 720         { }
 721 };
 722 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 723
 724 static struct i2c_driver wm8731_i2c_driver = {
 725         .driver = {
 726                 .name = "wm8731",
 727                 .owner = THIS_MODULE,
 728                 .of_match_table = wm8731_of_match,
 729         },
 730         .probe =    wm8731_i2c_probe,
 731         .remove =   __devexit_p(wm8731_i2c_remove),
 732         .id_table = wm8731_i2c_id,
 733 };
 734 #endif
 735
 736 static int __init wm8731_modinit(void)
 737 {
 738         int ret = 0;
 739 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 740         ret = i2c_add_driver(&wm8731_i2c_driver);
 741         if (ret != 0) {
 742                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 743                        ret);
 744         }
 745 #endif
 746 #if defined(CONFIG_SPI_MASTER)
 747         ret = spi_register_driver(&wm8731_spi_driver);
 748         if (ret != 0) {
 749                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 750                        ret);
 751         }
 752 #endif
 753         return ret;
 754 }
 755 module_init(wm8731_modinit);
 756
 757 static void __exit wm8731_exit(void)
 758 {
 759 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 760         i2c_del_driver(&wm8731_i2c_driver);
 761 #endif
 762 #if defined(CONFIG_SPI_MASTER)
 763         spi_unregister_driver(&wm8731_spi_driver);
 764 #endif
 765 }
 766 module_exit(wm8731_exit);
 767
 768 MODULE_DESCRIPTION("ASoC WM8731 driver");
 769 MODULE_AUTHOR("Richard Purdie");
 770 MODULE_LICENSE("GPL");