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/platform_device.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/spi/spi.h>
  25 #include <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30 #include <sound/tlv.h>
  31
  32 #include "wm8731.h"
  33
  34 #define WM8731_NUM_SUPPLIES 4
  35 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  36         "AVDD",
  37         "HPVDD",
  38         "DCVDD",
  39         "DBVDD",
  40 };
  41
  42 /* codec private data */
  43 struct wm8731_priv {
  44         enum snd_soc_control_type control_type;
  45         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  46         unsigned int sysclk;
  47         int sysclk_type;
  48         int playback_fs;
  49         bool deemph;
  50 };
  51
  52
  53 /*
  54  * wm8731 register cache
  55  * We can't read the WM8731 register space when we are
  56  * using 2 wire for device control, so we cache them instead.
  57  * There is no point in caching the reset register
  58  */
  59 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
  60         0x0097, 0x0097, 0x0079, 0x0079,
  61         0x000a, 0x0008, 0x009f, 0x000a,
  62         0x0000, 0x0000
  63 };
  64
  65 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  66
  67 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  68
  69 static const struct soc_enum wm8731_insel_enum =
  70         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
  71
  72 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  73
  74 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  75 {
  76         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  77         int val, i, best;
  78
  79         /* If we're using deemphasis select the nearest available sample
  80          * rate.
  81          */
  82         if (wm8731->deemph) {
  83                 best = 1;
  84                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
  85                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
  86                             abs(wm8731_deemph[best] - wm8731->playback_fs))
  87                                 best = i;
  88                 }
  89
  90                 val = best << 1;
  91         } else {
  92                 best = 0;
  93                 val = 0;
  94         }
  95
  96         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
  97                 best, wm8731_deemph[best]);
  98
  99         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 100 }
 101
 102 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 103                              struct snd_ctl_elem_value *ucontrol)
 104 {
 105         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 106         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 107
 108         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 109
 110         return 0;
 111 }
 112
 113 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 114                              struct snd_ctl_elem_value *ucontrol)
 115 {
 116         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 117         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 118         int deemph = ucontrol->value.enumerated.item[0];
 119         int ret = 0;
 120
 121         if (deemph > 1)
 122                 return -EINVAL;
 123
 124         mutex_lock(&codec->mutex);
 125         if (wm8731->deemph != deemph) {
 126                 wm8731->deemph = deemph;
 127
 128                 wm8731_set_deemph(codec);
 129
 130                 ret = 1;
 131         }
 132         mutex_unlock(&codec->mutex);
 133
 134         return ret;
 135 }
 136
 137 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 138 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 139 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 140 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 141
 142 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 143
 144 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 145                  0, 127, 0, out_tlv),
 146 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 147         7, 1, 0),
 148
 149 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 150                  in_tlv),
 151 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 152
 153 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 154 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 155
 156 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 157                sidetone_tlv),
 158
 159 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 160 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 161
 162 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 163                     wm8731_get_deemph, wm8731_put_deemph),
 164 };
 165
 166 /* Output Mixer */
 167 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 168 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 169 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 170 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 171 };
 172
 173 /* Input mux */
 174 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 175 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 176
 177 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 178 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 179 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 180         &wm8731_output_mixer_controls[0],
 181         ARRAY_SIZE(wm8731_output_mixer_controls)),
 182 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 183 SND_SOC_DAPM_OUTPUT("LOUT"),
 184 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 185 SND_SOC_DAPM_OUTPUT("ROUT"),
 186 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 187 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 188 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 189 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 190 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 191 SND_SOC_DAPM_INPUT("MICIN"),
 192 SND_SOC_DAPM_INPUT("RLINEIN"),
 193 SND_SOC_DAPM_INPUT("LLINEIN"),
 194 };
 195
 196 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 197                             struct snd_soc_dapm_widget *sink)
 198 {
 199         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 200
 201         return wm8731->sysclk_type == WM8731_SYSCLK_MCLK;
 202 }
 203
 204 static const struct snd_soc_dapm_route intercon[] = {
 205         {"DAC", NULL, "OSC", wm8731_check_osc},
 206         {"ADC", NULL, "OSC", wm8731_check_osc},
 207
 208         /* output mixer */
 209         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 210         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 211         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 212
 213         /* outputs */
 214         {"RHPOUT", NULL, "Output Mixer"},
 215         {"ROUT", NULL, "Output Mixer"},
 216         {"LHPOUT", NULL, "Output Mixer"},
 217         {"LOUT", NULL, "Output Mixer"},
 218
 219         /* input mux */
 220         {"Input Mux", "Line In", "Line Input"},
 221         {"Input Mux", "Mic", "Mic Bias"},
 222         {"ADC", NULL, "Input Mux"},
 223
 224         /* inputs */
 225         {"Line Input", NULL, "LLINEIN"},
 226         {"Line Input", NULL, "RLINEIN"},
 227         {"Mic Bias", NULL, "MICIN"},
 228 };
 229
 230 static int wm8731_add_widgets(struct snd_soc_codec *codec)
 231 {
 232         struct snd_soc_dapm_context *dapm = &codec->dapm;
 233
 234         snd_soc_dapm_new_controls(dapm, wm8731_dapm_widgets,
 235                                   ARRAY_SIZE(wm8731_dapm_widgets));
 236         snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
 237
 238         return 0;
 239 }
 240
 241 struct _coeff_div {
 242         u32 mclk;
 243         u32 rate;
 244         u16 fs;
 245         u8 sr:4;
 246         u8 bosr:1;
 247         u8 usb:1;
 248 };
 249
 250 /* codec mclk clock divider coefficients */
 251 static const struct _coeff_div coeff_div[] = {
 252         /* 48k */
 253         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 254         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 255         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 256
 257         /* 32k */
 258         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 259         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 260         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 261
 262         /* 8k */
 263         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 264         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 265         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 266         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 267         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 268
 269         /* 96k */
 270         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 271         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 272         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 273
 274         /* 44.1k */
 275         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 276         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 277         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 278
 279         /* 88.2k */
 280         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 281         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 282         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 283 };
 284
 285 static inline int get_coeff(int mclk, int rate)
 286 {
 287         int i;
 288
 289         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 290                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 291                         return i;
 292         }
 293         return 0;
 294 }
 295
 296 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 297                             struct snd_pcm_hw_params *params,
 298                             struct snd_soc_dai *dai)
 299 {
 300         struct snd_soc_codec *codec = dai->codec;
 301         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 302         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 303         int i = get_coeff(wm8731->sysclk, params_rate(params));
 304         u16 srate = (coeff_div[i].sr << 2) |
 305                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 306
 307         wm8731->playback_fs = params_rate(params);
 308
 309         snd_soc_write(codec, WM8731_SRATE, srate);
 310
 311         /* bit size */
 312         switch (params_format(params)) {
 313         case SNDRV_PCM_FORMAT_S16_LE:
 314                 break;
 315         case SNDRV_PCM_FORMAT_S20_3LE:
 316                 iface |= 0x0004;
 317                 break;
 318         case SNDRV_PCM_FORMAT_S24_LE:
 319                 iface |= 0x0008;
 320                 break;
 321         }
 322
 323         wm8731_set_deemph(codec);
 324
 325         snd_soc_write(codec, WM8731_IFACE, iface);
 326         return 0;
 327 }
 328
 329 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream,
 330                               struct snd_soc_dai *dai)
 331 {
 332         struct snd_soc_codec *codec = dai->codec;
 333
 334         /* set active */
 335         snd_soc_write(codec, WM8731_ACTIVE, 0x0001);
 336
 337         return 0;
 338 }
 339
 340 static void wm8731_shutdown(struct snd_pcm_substream *substream,
 341                             struct snd_soc_dai *dai)
 342 {
 343         struct snd_soc_codec *codec = dai->codec;
 344
 345         /* deactivate */
 346         if (!codec->active) {
 347                 udelay(50);
 348                 snd_soc_write(codec, WM8731_ACTIVE, 0x0);
 349         }
 350 }
 351
 352 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 353 {
 354         struct snd_soc_codec *codec = dai->codec;
 355         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 356
 357         if (mute)
 358                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 359         else
 360                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 361         return 0;
 362 }
 363
 364 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 365                 int clk_id, unsigned int freq, int dir)
 366 {
 367         struct snd_soc_codec *codec = codec_dai->codec;
 368         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 369
 370         switch (clk_id) {
 371         case WM8731_SYSCLK_XTAL:
 372         case WM8731_SYSCLK_MCLK:
 373                 wm8731->sysclk_type = clk_id;
 374                 break;
 375         default:
 376                 return -EINVAL;
 377         }
 378
 379         switch (freq) {
 380         case 11289600:
 381         case 12000000:
 382         case 12288000:
 383         case 16934400:
 384         case 18432000:
 385                 wm8731->sysclk = freq;
 386                 break;
 387         default:
 388                 return -EINVAL;
 389         }
 390
 391         snd_soc_dapm_sync(&codec->dapm);
 392
 393         return 0;
 394 }
 395
 396
 397 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 398                 unsigned int fmt)
 399 {
 400         struct snd_soc_codec *codec = codec_dai->codec;
 401         u16 iface = 0;
 402
 403         /* set master/slave audio interface */
 404         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 405         case SND_SOC_DAIFMT_CBM_CFM:
 406                 iface |= 0x0040;
 407                 break;
 408         case SND_SOC_DAIFMT_CBS_CFS:
 409                 break;
 410         default:
 411                 return -EINVAL;
 412         }
 413
 414         /* interface format */
 415         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 416         case SND_SOC_DAIFMT_I2S:
 417                 iface |= 0x0002;
 418                 break;
 419         case SND_SOC_DAIFMT_RIGHT_J:
 420                 break;
 421         case SND_SOC_DAIFMT_LEFT_J:
 422                 iface |= 0x0001;
 423                 break;
 424         case SND_SOC_DAIFMT_DSP_A:
 425                 iface |= 0x0003;
 426                 break;
 427         case SND_SOC_DAIFMT_DSP_B:
 428                 iface |= 0x0013;
 429                 break;
 430         default:
 431                 return -EINVAL;
 432         }
 433
 434         /* clock inversion */
 435         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 436         case SND_SOC_DAIFMT_NB_NF:
 437                 break;
 438         case SND_SOC_DAIFMT_IB_IF:
 439                 iface |= 0x0090;
 440                 break;
 441         case SND_SOC_DAIFMT_IB_NF:
 442                 iface |= 0x0080;
 443                 break;
 444         case SND_SOC_DAIFMT_NB_IF:
 445                 iface |= 0x0010;
 446                 break;
 447         default:
 448                 return -EINVAL;
 449         }
 450
 451         /* set iface */
 452         snd_soc_write(codec, WM8731_IFACE, iface);
 453         return 0;
 454 }
 455
 456 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 457                                  enum snd_soc_bias_level level)
 458 {
 459         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 460         int i, ret;
 461         u8 data[2];
 462         u16 *cache = codec->reg_cache;
 463         u16 reg;
 464
 465         switch (level) {
 466         case SND_SOC_BIAS_ON:
 467                 break;
 468         case SND_SOC_BIAS_PREPARE:
 469                 break;
 470         case SND_SOC_BIAS_STANDBY:
 471                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 472                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 473                                                     wm8731->supplies);
 474                         if (ret != 0)
 475                                 return ret;
 476
 477                         /* Sync reg_cache with the hardware */
 478                         for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
 479                                 if (cache[i] == wm8731_reg[i])
 480                                         continue;
 481
 482                                 data[0] = (i << 1) | ((cache[i] >> 8)
 483                                                       & 0x0001);
 484                                 data[1] = cache[i] & 0x00ff;
 485                                 codec->hw_write(codec->control_data, data, 2);
 486                         }
 487                 }
 488
 489                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 490                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 491                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 492                 break;
 493         case SND_SOC_BIAS_OFF:
 494                 snd_soc_write(codec, WM8731_ACTIVE, 0x0);
 495                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 496                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 497                                        wm8731->supplies);
 498                 break;
 499         }
 500         codec->dapm.bias_level = level;
 501         return 0;
 502 }
 503
 504 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 505
 506 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 507         SNDRV_PCM_FMTBIT_S24_LE)
 508
 509 static struct snd_soc_dai_ops wm8731_dai_ops = {
 510         .prepare        = wm8731_pcm_prepare,
 511         .hw_params      = wm8731_hw_params,
 512         .shutdown       = wm8731_shutdown,
 513         .digital_mute   = wm8731_mute,
 514         .set_sysclk     = wm8731_set_dai_sysclk,
 515         .set_fmt        = wm8731_set_dai_fmt,
 516 };
 517
 518 static struct snd_soc_dai_driver wm8731_dai = {
 519         .name = "wm8731-hifi",
 520         .playback = {
 521                 .stream_name = "Playback",
 522                 .channels_min = 1,
 523                 .channels_max = 2,
 524                 .rates = WM8731_RATES,
 525                 .formats = WM8731_FORMATS,},
 526         .capture = {
 527                 .stream_name = "Capture",
 528                 .channels_min = 1,
 529                 .channels_max = 2,
 530                 .rates = WM8731_RATES,
 531                 .formats = WM8731_FORMATS,},
 532         .ops = &wm8731_dai_ops,
 533         .symmetric_rates = 1,
 534 };
 535
 536 #ifdef CONFIG_PM
 537 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state)
 538 {
 539         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 540
 541         return 0;
 542 }
 543
 544 static int wm8731_resume(struct snd_soc_codec *codec)
 545 {
 546         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 547
 548         return 0;
 549 }
 550 #else
 551 #define wm8731_suspend NULL
 552 #define wm8731_resume NULL
 553 #endif
 554
 555 static int wm8731_probe(struct snd_soc_codec *codec)
 556 {
 557         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 558         int ret = 0, i;
 559
 560         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type);
 561         if (ret < 0) {
 562                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 563                 return ret;
 564         }
 565
 566         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 567                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 568
 569         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 570                                  wm8731->supplies);
 571         if (ret != 0) {
 572                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 573                 return ret;
 574         }
 575
 576         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 577                                     wm8731->supplies);
 578         if (ret != 0) {
 579                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 580                 goto err_regulator_get;
 581         }
 582
 583         ret = wm8731_reset(codec);
 584         if (ret < 0) {
 585                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 586                 goto err_regulator_enable;
 587         }
 588
 589         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 590
 591         /* Latch the update bits */
 592         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 593         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 594         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 595         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 596
 597         /* Disable bypass path by default */
 598         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 599
 600         snd_soc_add_controls(codec, wm8731_snd_controls,
 601                              ARRAY_SIZE(wm8731_snd_controls));
 602         wm8731_add_widgets(codec);
 603
 604         /* Regulators will have been enabled by bias management */
 605         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 606
 607         return 0;
 608
 609 err_regulator_enable:
 610         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 611 err_regulator_get:
 612         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 613
 614         return ret;
 615 }
 616
 617 /* power down chip */
 618 static int wm8731_remove(struct snd_soc_codec *codec)
 619 {
 620         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 621
 622         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 623
 624         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 625         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 626
 627         return 0;
 628 }
 629
 630 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 631         .probe =        wm8731_probe,
 632         .remove =       wm8731_remove,
 633         .suspend =      wm8731_suspend,
 634         .resume =       wm8731_resume,
 635         .set_bias_level = wm8731_set_bias_level,
 636         .reg_cache_size = ARRAY_SIZE(wm8731_reg),
 637         .reg_word_size = sizeof(u16),
 638         .reg_cache_default = wm8731_reg,
 639 };
 640
 641 #if defined(CONFIG_SPI_MASTER)
 642 static int __devinit wm8731_spi_probe(struct spi_device *spi)
 643 {
 644         struct wm8731_priv *wm8731;
 645         int ret;
 646
 647         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 648         if (wm8731 == NULL)
 649                 return -ENOMEM;
 650
 651         wm8731->control_type = SND_SOC_SPI;
 652         spi_set_drvdata(spi, wm8731);
 653
 654         ret = snd_soc_register_codec(&spi->dev,
 655                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 656         if (ret < 0)
 657                 kfree(wm8731);
 658         return ret;
 659 }
 660
 661 static int __devexit wm8731_spi_remove(struct spi_device *spi)
 662 {
 663         snd_soc_unregister_codec(&spi->dev);
 664         kfree(spi_get_drvdata(spi));
 665         return 0;
 666 }
 667
 668 static struct spi_driver wm8731_spi_driver = {
 669         .driver = {
 670                 .name   = "wm8731-codec",
 671                 .owner  = THIS_MODULE,
 672         },
 673         .probe          = wm8731_spi_probe,
 674         .remove         = __devexit_p(wm8731_spi_remove),
 675 };
 676 #endif /* CONFIG_SPI_MASTER */
 677
 678 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 679 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
 680                                       const struct i2c_device_id *id)
 681 {
 682         struct wm8731_priv *wm8731;
 683         int ret;
 684
 685         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 686         if (wm8731 == NULL)
 687                 return -ENOMEM;
 688
 689         i2c_set_clientdata(i2c, wm8731);
 690         wm8731->control_type = SND_SOC_I2C;
 691
 692         ret =  snd_soc_register_codec(&i2c->dev,
 693                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 694         if (ret < 0)
 695                 kfree(wm8731);
 696         return ret;
 697 }
 698
 699 static __devexit int wm8731_i2c_remove(struct i2c_client *client)
 700 {
 701         snd_soc_unregister_codec(&client->dev);
 702         kfree(i2c_get_clientdata(client));
 703         return 0;
 704 }
 705
 706 static const struct i2c_device_id wm8731_i2c_id[] = {
 707         { "wm8731", 0 },
 708         { }
 709 };
 710 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 711
 712 static struct i2c_driver wm8731_i2c_driver = {
 713         .driver = {
 714                 .name = "wm8731-codec",
 715                 .owner = THIS_MODULE,
 716         },
 717         .probe =    wm8731_i2c_probe,
 718         .remove =   __devexit_p(wm8731_i2c_remove),
 719         .id_table = wm8731_i2c_id,
 720 };
 721 #endif
 722
 723 static int __init wm8731_modinit(void)
 724 {
 725         int ret = 0;
 726 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 727         ret = i2c_add_driver(&wm8731_i2c_driver);
 728         if (ret != 0) {
 729                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 730                        ret);
 731         }
 732 #endif
 733 #if defined(CONFIG_SPI_MASTER)
 734         ret = spi_register_driver(&wm8731_spi_driver);
 735         if (ret != 0) {
 736                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 737                        ret);
 738         }
 739 #endif
 740         return ret;
 741 }
 742 module_init(wm8731_modinit);
 743
 744 static void __exit wm8731_exit(void)
 745 {
 746 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 747         i2c_del_driver(&wm8731_i2c_driver);
 748 #endif
 749 #if defined(CONFIG_SPI_MASTER)
 750         spi_unregister_driver(&wm8731_spi_driver);
 751 #endif
 752 }
 753 module_exit(wm8731_exit);
 754
 755 MODULE_DESCRIPTION("ASoC WM8731 driver");
 756 MODULE_AUTHOR("Richard Purdie");
 757 MODULE_LICENSE("GPL");