sound/soc/codecs/wm8731.c

   1 /*
   2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  * Copyright 2006-12 Wolfson Microelectronics, plc
   6  *
   7  * Author: Richard Purdie <richard@openedhand.com>
   8  *
   9  * Based on wm8753.c by Liam Girdwood
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/moduleparam.h>
  18 #include <linux/init.h>
  19 #include <linux/delay.h>
  20 #include <linux/pm.h>
  21 #include <linux/i2c.h>
  22 #include <linux/slab.h>
  23 #include <linux/regmap.h>
  24 #include <linux/regulator/consumer.h>
  25 #include <linux/spi/spi.h>
  26 #include <linux/of_device.h>
  27 #include <linux/mutex.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/initval.h>
  33 #include <sound/tlv.h>
  34
  35 #include "wm8731.h"
  36
  37 #define WM8731_NUM_SUPPLIES 4
  38 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  39         "AVDD",
  40         "HPVDD",
  41         "DCVDD",
  42         "DBVDD",
  43 };
  44
  45 /* codec private data */
  46 struct wm8731_priv {
  47         struct regmap *regmap;
  48         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  49         const struct snd_pcm_hw_constraint_list *constraints;
  50         unsigned int sysclk;
  51         int sysclk_type;
  52         int playback_fs;
  53         bool deemph;
  54
  55         struct mutex lock;
  56 };
  57
  58
  59 /*
  60  * wm8731 register cache
  61  */
  62 static const struct reg_default wm8731_reg_defaults[] = {
  63         { 0, 0x0097 },
  64         { 1, 0x0097 },
  65         { 2, 0x0079 },
  66         { 3, 0x0079 },
  67         { 4, 0x000a },
  68         { 5, 0x0008 },
  69         { 6, 0x009f },
  70         { 7, 0x000a },
  71         { 8, 0x0000 },
  72         { 9, 0x0000 },
  73 };
  74
  75 static bool wm8731_volatile(struct device *dev, unsigned int reg)
  76 {
  77         return reg == WM8731_RESET;
  78 }
  79
  80 static bool wm8731_writeable(struct device *dev, unsigned int reg)
  81 {
  82         return reg <= WM8731_RESET;
  83 }
  84
  85 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  86
  87 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  88
  89 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
  90                             WM8731_APANA, 2, wm8731_input_select);
  91
  92 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  93
  94 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  95 {
  96         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  97         int val, i, best;
  98
  99         /* If we're using deemphasis select the nearest available sample
 100          * rate.
 101          */
 102         if (wm8731->deemph) {
 103                 best = 1;
 104                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
 105                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
 106                             abs(wm8731_deemph[best] - wm8731->playback_fs))
 107                                 best = i;
 108                 }
 109
 110                 val = best << 1;
 111         } else {
 112                 best = 0;
 113                 val = 0;
 114         }
 115
 116         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
 117                 best, wm8731_deemph[best]);
 118
 119         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 120 }
 121
 122 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 123                              struct snd_ctl_elem_value *ucontrol)
 124 {
 125         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 126         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 127
 128         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 129
 130         return 0;
 131 }
 132
 133 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 134                              struct snd_ctl_elem_value *ucontrol)
 135 {
 136         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 137         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 138         int deemph = ucontrol->value.enumerated.item[0];
 139         int ret = 0;
 140
 141         if (deemph > 1)
 142                 return -EINVAL;
 143
 144         mutex_lock(&wm8731->lock);
 145         if (wm8731->deemph != deemph) {
 146                 wm8731->deemph = deemph;
 147
 148                 wm8731_set_deemph(codec);
 149
 150                 ret = 1;
 151         }
 152         mutex_unlock(&wm8731->lock);
 153
 154         return ret;
 155 }
 156
 157 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 158 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 159 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 160 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 161
 162 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 163
 164 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 165                  0, 127, 0, out_tlv),
 166 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 167         7, 1, 0),
 168
 169 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 170                  in_tlv),
 171 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 172
 173 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 174 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 175
 176 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 177                sidetone_tlv),
 178
 179 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 180 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 181
 182 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 183                     wm8731_get_deemph, wm8731_put_deemph),
 184 };
 185
 186 /* Output Mixer */
 187 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 188 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 189 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 190 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 191 };
 192
 193 /* Input mux */
 194 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 195 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 196
 197 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 198 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 199 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 200 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 201         &wm8731_output_mixer_controls[0],
 202         ARRAY_SIZE(wm8731_output_mixer_controls)),
 203 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 204 SND_SOC_DAPM_OUTPUT("LOUT"),
 205 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 206 SND_SOC_DAPM_OUTPUT("ROUT"),
 207 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 208 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 209 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 210 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 211 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 212 SND_SOC_DAPM_INPUT("MICIN"),
 213 SND_SOC_DAPM_INPUT("RLINEIN"),
 214 SND_SOC_DAPM_INPUT("LLINEIN"),
 215 };
 216
 217 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 218                             struct snd_soc_dapm_widget *sink)
 219 {
 220         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
 221         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 222
 223         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 224 }
 225
 226 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 227         {"DAC", NULL, "OSC", wm8731_check_osc},
 228         {"ADC", NULL, "OSC", wm8731_check_osc},
 229         {"DAC", NULL, "ACTIVE"},
 230         {"ADC", NULL, "ACTIVE"},
 231
 232         /* output mixer */
 233         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 234         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 235         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 236
 237         /* outputs */
 238         {"RHPOUT", NULL, "Output Mixer"},
 239         {"ROUT", NULL, "Output Mixer"},
 240         {"LHPOUT", NULL, "Output Mixer"},
 241         {"LOUT", NULL, "Output Mixer"},
 242
 243         /* input mux */
 244         {"Input Mux", "Line In", "Line Input"},
 245         {"Input Mux", "Mic", "Mic Bias"},
 246         {"ADC", NULL, "Input Mux"},
 247
 248         /* inputs */
 249         {"Line Input", NULL, "LLINEIN"},
 250         {"Line Input", NULL, "RLINEIN"},
 251         {"Mic Bias", NULL, "MICIN"},
 252 };
 253
 254 struct _coeff_div {
 255         u32 mclk;
 256         u32 rate;
 257         u16 fs;
 258         u8 sr:4;
 259         u8 bosr:1;
 260         u8 usb:1;
 261 };
 262
 263 /* codec mclk clock divider coefficients */
 264 static const struct _coeff_div coeff_div[] = {
 265         /* 48k */
 266         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 267         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 268         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 269
 270         /* 32k */
 271         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 272         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 273         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 274
 275         /* 8k */
 276         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 277         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 278         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 279         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 280         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 281
 282         /* 96k */
 283         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 284         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 285         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 286
 287         /* 44.1k */
 288         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 289         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 290         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 291
 292         /* 88.2k */
 293         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 294         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 295         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 296 };
 297
 298 /* rates constraints */
 299 static const unsigned int wm8731_rates_12000000[] = {
 300         8000, 32000, 44100, 48000, 96000, 88200,
 301 };
 302
 303 static const unsigned int wm8731_rates_12288000_18432000[] = {
 304         8000, 32000, 48000, 96000,
 305 };
 306
 307 static const unsigned int wm8731_rates_11289600_16934400[] = {
 308         8000, 44100, 88200,
 309 };
 310
 311 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
 312         .list = wm8731_rates_12000000,
 313         .count = ARRAY_SIZE(wm8731_rates_12000000),
 314 };
 315
 316 static const
 317 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
 318         .list = wm8731_rates_12288000_18432000,
 319         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
 320 };
 321
 322 static const
 323 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
 324         .list = wm8731_rates_11289600_16934400,
 325         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
 326 };
 327
 328 static inline int get_coeff(int mclk, int rate)
 329 {
 330         int i;
 331
 332         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 333                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 334                         return i;
 335         }
 336         return 0;
 337 }
 338
 339 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 340                             struct snd_pcm_hw_params *params,
 341                             struct snd_soc_dai *dai)
 342 {
 343         struct snd_soc_codec *codec = dai->codec;
 344         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 345         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 346         int i = get_coeff(wm8731->sysclk, params_rate(params));
 347         u16 srate = (coeff_div[i].sr << 2) |
 348                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 349
 350         wm8731->playback_fs = params_rate(params);
 351
 352         snd_soc_write(codec, WM8731_SRATE, srate);
 353
 354         /* bit size */
 355         switch (params_width(params)) {
 356         case 16:
 357                 break;
 358         case 20:
 359                 iface |= 0x0004;
 360                 break;
 361         case 24:
 362                 iface |= 0x0008;
 363                 break;
 364         }
 365
 366         wm8731_set_deemph(codec);
 367
 368         snd_soc_write(codec, WM8731_IFACE, iface);
 369         return 0;
 370 }
 371
 372 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 373 {
 374         struct snd_soc_codec *codec = dai->codec;
 375         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 376
 377         if (mute)
 378                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 379         else
 380                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 381         return 0;
 382 }
 383
 384 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 385                 int clk_id, unsigned int freq, int dir)
 386 {
 387         struct snd_soc_codec *codec = codec_dai->codec;
 388         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 389
 390         switch (clk_id) {
 391         case WM8731_SYSCLK_XTAL:
 392         case WM8731_SYSCLK_MCLK:
 393                 wm8731->sysclk_type = clk_id;
 394                 break;
 395         default:
 396                 return -EINVAL;
 397         }
 398
 399         switch (freq) {
 400         case 0:
 401                 wm8731->constraints = NULL;
 402                 break;
 403         case 12000000:
 404                 wm8731->constraints = &wm8731_constraints_12000000;
 405                 break;
 406         case 12288000:
 407         case 18432000:
 408                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
 409                 break;
 410         case 16934400:
 411         case 11289600:
 412                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
 413                 break;
 414         default:
 415                 return -EINVAL;
 416         }
 417
 418         wm8731->sysclk = freq;
 419
 420         snd_soc_dapm_sync(&codec->dapm);
 421
 422         return 0;
 423 }
 424
 425
 426 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 427                 unsigned int fmt)
 428 {
 429         struct snd_soc_codec *codec = codec_dai->codec;
 430         u16 iface = 0;
 431
 432         /* set master/slave audio interface */
 433         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 434         case SND_SOC_DAIFMT_CBM_CFM:
 435                 iface |= 0x0040;
 436                 break;
 437         case SND_SOC_DAIFMT_CBS_CFS:
 438                 break;
 439         default:
 440                 return -EINVAL;
 441         }
 442
 443         /* interface format */
 444         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 445         case SND_SOC_DAIFMT_I2S:
 446                 iface |= 0x0002;
 447                 break;
 448         case SND_SOC_DAIFMT_RIGHT_J:
 449                 break;
 450         case SND_SOC_DAIFMT_LEFT_J:
 451                 iface |= 0x0001;
 452                 break;
 453         case SND_SOC_DAIFMT_DSP_A:
 454                 iface |= 0x0013;
 455                 break;
 456         case SND_SOC_DAIFMT_DSP_B:
 457                 iface |= 0x0003;
 458                 break;
 459         default:
 460                 return -EINVAL;
 461         }
 462
 463         /* clock inversion */
 464         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 465         case SND_SOC_DAIFMT_NB_NF:
 466                 break;
 467         case SND_SOC_DAIFMT_IB_IF:
 468                 iface |= 0x0090;
 469                 break;
 470         case SND_SOC_DAIFMT_IB_NF:
 471                 iface |= 0x0080;
 472                 break;
 473         case SND_SOC_DAIFMT_NB_IF:
 474                 iface |= 0x0010;
 475                 break;
 476         default:
 477                 return -EINVAL;
 478         }
 479
 480         /* set iface */
 481         snd_soc_write(codec, WM8731_IFACE, iface);
 482         return 0;
 483 }
 484
 485 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 486                                  enum snd_soc_bias_level level)
 487 {
 488         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 489         int ret;
 490         u16 reg;
 491
 492         switch (level) {
 493         case SND_SOC_BIAS_ON:
 494                 break;
 495         case SND_SOC_BIAS_PREPARE:
 496                 break;
 497         case SND_SOC_BIAS_STANDBY:
 498                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 499                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 500                                                     wm8731->supplies);
 501                         if (ret != 0)
 502                                 return ret;
 503
 504                         regcache_sync(wm8731->regmap);
 505                 }
 506
 507                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 508                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 509                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 510                 break;
 511         case SND_SOC_BIAS_OFF:
 512                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 513                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 514                                        wm8731->supplies);
 515                 regcache_mark_dirty(wm8731->regmap);
 516                 break;
 517         }
 518         codec->dapm.bias_level = level;
 519         return 0;
 520 }
 521
 522 static int wm8731_startup(struct snd_pcm_substream *substream,
 523         struct snd_soc_dai *dai)
 524 {
 525         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
 526
 527         if (wm8731->constraints)
 528                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 529                                            SNDRV_PCM_HW_PARAM_RATE,
 530                                            wm8731->constraints);
 531
 532         return 0;
 533 }
 534
 535 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 536
 537 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 538         SNDRV_PCM_FMTBIT_S24_LE)
 539
 540 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 541         .startup        = wm8731_startup,
 542         .hw_params      = wm8731_hw_params,
 543         .digital_mute   = wm8731_mute,
 544         .set_sysclk     = wm8731_set_dai_sysclk,
 545         .set_fmt        = wm8731_set_dai_fmt,
 546 };
 547
 548 static struct snd_soc_dai_driver wm8731_dai = {
 549         .name = "wm8731-hifi",
 550         .playback = {
 551                 .stream_name = "Playback",
 552                 .channels_min = 1,
 553                 .channels_max = 2,
 554                 .rates = WM8731_RATES,
 555                 .formats = WM8731_FORMATS,},
 556         .capture = {
 557                 .stream_name = "Capture",
 558                 .channels_min = 1,
 559                 .channels_max = 2,
 560                 .rates = WM8731_RATES,
 561                 .formats = WM8731_FORMATS,},
 562         .ops = &wm8731_dai_ops,
 563         .symmetric_rates = 1,
 564 };
 565
 566 static int wm8731_probe(struct snd_soc_codec *codec)
 567 {
 568         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 569         int ret = 0, i;
 570
 571         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 572                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 573
 574         ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 575                                  wm8731->supplies);
 576         if (ret != 0) {
 577                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 578                 return ret;
 579         }
 580
 581         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 582                                     wm8731->supplies);
 583         if (ret != 0) {
 584                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 585                 return ret;
 586         }
 587
 588         ret = wm8731_reset(codec);
 589         if (ret < 0) {
 590                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 591                 goto err_regulator_enable;
 592         }
 593
 594         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 595
 596         /* Latch the update bits */
 597         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 598         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 599         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 600         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 601
 602         /* Disable bypass path by default */
 603         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 604
 605         /* Regulators will have been enabled by bias management */
 606         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 607
 608         return 0;
 609
 610 err_regulator_enable:
 611         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 612
 613         return ret;
 614 }
 615
 616 /* power down chip */
 617 static int wm8731_remove(struct snd_soc_codec *codec)
 618 {
 619         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 620
 621         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 622
 623         return 0;
 624 }
 625
 626 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 627         .probe =        wm8731_probe,
 628         .remove =       wm8731_remove,
 629         .set_bias_level = wm8731_set_bias_level,
 630         .suspend_bias_off = true,
 631
 632         .dapm_widgets = wm8731_dapm_widgets,
 633         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 634         .dapm_routes = wm8731_intercon,
 635         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 636         .controls =     wm8731_snd_controls,
 637         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
 638 };
 639
 640 static const struct of_device_id wm8731_of_match[] = {
 641         { .compatible = "wlf,wm8731", },
 642         { }
 643 };
 644
 645 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 646
 647 static const struct regmap_config wm8731_regmap = {
 648         .reg_bits = 7,
 649         .val_bits = 9,
 650
 651         .max_register = WM8731_RESET,
 652         .volatile_reg = wm8731_volatile,
 653         .writeable_reg = wm8731_writeable,
 654
 655         .cache_type = REGCACHE_RBTREE,
 656         .reg_defaults = wm8731_reg_defaults,
 657         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 658 };
 659
 660 #if defined(CONFIG_SPI_MASTER)
 661 static int wm8731_spi_probe(struct spi_device *spi)
 662 {
 663         struct wm8731_priv *wm8731;
 664         int ret;
 665
 666         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
 667         if (wm8731 == NULL)
 668                 return -ENOMEM;
 669
 670         mutex_init(&wm8731->lock);
 671
 672         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 673         if (IS_ERR(wm8731->regmap)) {
 674                 ret = PTR_ERR(wm8731->regmap);
 675                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 676                         ret);
 677                 return ret;
 678         }
 679
 680         spi_set_drvdata(spi, wm8731);
 681
 682         ret = snd_soc_register_codec(&spi->dev,
 683                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 684         if (ret != 0) {
 685                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 686                 return ret;
 687         }
 688
 689         return 0;
 690 }
 691
 692 static int wm8731_spi_remove(struct spi_device *spi)
 693 {
 694         snd_soc_unregister_codec(&spi->dev);
 695         return 0;
 696 }
 697
 698 static struct spi_driver wm8731_spi_driver = {
 699         .driver = {
 700                 .name   = "wm8731",
 701                 .owner  = THIS_MODULE,
 702                 .of_match_table = wm8731_of_match,
 703         },
 704         .probe          = wm8731_spi_probe,
 705         .remove         = wm8731_spi_remove,
 706 };
 707 #endif /* CONFIG_SPI_MASTER */
 708
 709 #if IS_ENABLED(CONFIG_I2C)
 710 static int wm8731_i2c_probe(struct i2c_client *i2c,
 711                             const struct i2c_device_id *id)
 712 {
 713         struct wm8731_priv *wm8731;
 714         int ret;
 715
 716         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 717                               GFP_KERNEL);
 718         if (wm8731 == NULL)
 719                 return -ENOMEM;
 720
 721         mutex_init(&wm8731->lock);
 722
 723         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 724         if (IS_ERR(wm8731->regmap)) {
 725                 ret = PTR_ERR(wm8731->regmap);
 726                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 727                         ret);
 728                 return ret;
 729         }
 730
 731         i2c_set_clientdata(i2c, wm8731);
 732
 733         ret = snd_soc_register_codec(&i2c->dev,
 734                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 735         if (ret != 0) {
 736                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 737                 return ret;
 738         }
 739
 740         return 0;
 741 }
 742
 743 static int wm8731_i2c_remove(struct i2c_client *client)
 744 {
 745         snd_soc_unregister_codec(&client->dev);
 746         return 0;
 747 }
 748
 749 static const struct i2c_device_id wm8731_i2c_id[] = {
 750         { "wm8731", 0 },
 751         { }
 752 };
 753 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 754
 755 static struct i2c_driver wm8731_i2c_driver = {
 756         .driver = {
 757                 .name = "wm8731",
 758                 .owner = THIS_MODULE,
 759                 .of_match_table = wm8731_of_match,
 760         },
 761         .probe =    wm8731_i2c_probe,
 762         .remove =   wm8731_i2c_remove,
 763         .id_table = wm8731_i2c_id,
 764 };
 765 #endif
 766
 767 static int __init wm8731_modinit(void)
 768 {
 769         int ret = 0;
 770 #if IS_ENABLED(CONFIG_I2C)
 771         ret = i2c_add_driver(&wm8731_i2c_driver);
 772         if (ret != 0) {
 773                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 774                        ret);
 775         }
 776 #endif
 777 #if defined(CONFIG_SPI_MASTER)
 778         ret = spi_register_driver(&wm8731_spi_driver);
 779         if (ret != 0) {
 780                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 781                        ret);
 782         }
 783 #endif
 784         return ret;
 785 }
 786 module_init(wm8731_modinit);
 787
 788 static void __exit wm8731_exit(void)
 789 {
 790 #if IS_ENABLED(CONFIG_I2C)
 791         i2c_del_driver(&wm8731_i2c_driver);
 792 #endif
 793 #if defined(CONFIG_SPI_MASTER)
 794         spi_unregister_driver(&wm8731_spi_driver);
 795 #endif
 796 }
 797 module_exit(wm8731_exit);
 798
 799 MODULE_DESCRIPTION("ASoC WM8731 driver");
 800 MODULE_AUTHOR("Richard Purdie");
 801 MODULE_LICENSE("GPL");