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 <linux/clk.h>
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/pcm_params.h>
  32 #include <sound/soc.h>
  33 #include <sound/initval.h>
  34 #include <sound/tlv.h>
  35
  36 #include "wm8731.h"
  37
  38 #define WM8731_NUM_SUPPLIES 4
  39 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  40         "AVDD",
  41         "HPVDD",
  42         "DCVDD",
  43         "DBVDD",
  44 };
  45
  46 /* codec private data */
  47 struct wm8731_priv {
  48         struct regmap *regmap;
  49         struct clk *mclk;
  50         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  51         const struct snd_pcm_hw_constraint_list *constraints;
  52         unsigned int sysclk;
  53         int sysclk_type;
  54         int playback_fs;
  55         bool deemph;
  56
  57         struct mutex lock;
  58 };
  59
  60
  61 /*
  62  * wm8731 register cache
  63  */
  64 static const struct reg_default wm8731_reg_defaults[] = {
  65         { 0, 0x0097 },
  66         { 1, 0x0097 },
  67         { 2, 0x0079 },
  68         { 3, 0x0079 },
  69         { 4, 0x000a },
  70         { 5, 0x0008 },
  71         { 6, 0x009f },
  72         { 7, 0x000a },
  73         { 8, 0x0000 },
  74         { 9, 0x0000 },
  75 };
  76
  77 static bool wm8731_volatile(struct device *dev, unsigned int reg)
  78 {
  79         return reg == WM8731_RESET;
  80 }
  81
  82 static bool wm8731_writeable(struct device *dev, unsigned int reg)
  83 {
  84         return reg <= WM8731_RESET;
  85 }
  86
  87 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  88
  89 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  90
  91 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
  92                             WM8731_APANA, 2, wm8731_input_select);
  93
  94 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  95
  96 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  97 {
  98         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  99         int val, i, best;
 100
 101         /* If we're using deemphasis select the nearest available sample
 102          * rate.
 103          */
 104         if (wm8731->deemph) {
 105                 best = 1;
 106                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
 107                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
 108                             abs(wm8731_deemph[best] - wm8731->playback_fs))
 109                                 best = i;
 110                 }
 111
 112                 val = best << 1;
 113         } else {
 114                 best = 0;
 115                 val = 0;
 116         }
 117
 118         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
 119                 best, wm8731_deemph[best]);
 120
 121         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 122 }
 123
 124 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 125                              struct snd_ctl_elem_value *ucontrol)
 126 {
 127         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 128         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 129
 130         ucontrol->value.integer.value[0] = wm8731->deemph;
 131
 132         return 0;
 133 }
 134
 135 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 136                              struct snd_ctl_elem_value *ucontrol)
 137 {
 138         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 139         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 140         int deemph = ucontrol->value.integer.value[0];
 141         int ret = 0;
 142
 143         if (deemph > 1)
 144                 return -EINVAL;
 145
 146         mutex_lock(&wm8731->lock);
 147         if (wm8731->deemph != deemph) {
 148                 wm8731->deemph = deemph;
 149
 150                 wm8731_set_deemph(codec);
 151
 152                 ret = 1;
 153         }
 154         mutex_unlock(&wm8731->lock);
 155
 156         return ret;
 157 }
 158
 159 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 160 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 161 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 162 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 163
 164 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 165
 166 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 167                  0, 127, 0, out_tlv),
 168 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 169         7, 1, 0),
 170
 171 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 172                  in_tlv),
 173 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 174
 175 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 176 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 177
 178 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 179                sidetone_tlv),
 180
 181 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 182 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 183
 184 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 185                     wm8731_get_deemph, wm8731_put_deemph),
 186 };
 187
 188 /* Output Mixer */
 189 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 190 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 191 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 192 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 193 };
 194
 195 /* Input mux */
 196 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 197 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 198
 199 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 200 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 201 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 202 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 203         &wm8731_output_mixer_controls[0],
 204         ARRAY_SIZE(wm8731_output_mixer_controls)),
 205 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 206 SND_SOC_DAPM_OUTPUT("LOUT"),
 207 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 208 SND_SOC_DAPM_OUTPUT("ROUT"),
 209 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 210 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 211 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 212 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 213 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 214 SND_SOC_DAPM_INPUT("MICIN"),
 215 SND_SOC_DAPM_INPUT("RLINEIN"),
 216 SND_SOC_DAPM_INPUT("LLINEIN"),
 217 };
 218
 219 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 220                             struct snd_soc_dapm_widget *sink)
 221 {
 222         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
 223         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 224
 225         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 226 }
 227
 228 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 229         {"DAC", NULL, "OSC", wm8731_check_osc},
 230         {"ADC", NULL, "OSC", wm8731_check_osc},
 231         {"DAC", NULL, "ACTIVE"},
 232         {"ADC", NULL, "ACTIVE"},
 233
 234         /* output mixer */
 235         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 236         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 237         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 238
 239         /* outputs */
 240         {"RHPOUT", NULL, "Output Mixer"},
 241         {"ROUT", NULL, "Output Mixer"},
 242         {"LHPOUT", NULL, "Output Mixer"},
 243         {"LOUT", NULL, "Output Mixer"},
 244
 245         /* input mux */
 246         {"Input Mux", "Line In", "Line Input"},
 247         {"Input Mux", "Mic", "Mic Bias"},
 248         {"ADC", NULL, "Input Mux"},
 249
 250         /* inputs */
 251         {"Line Input", NULL, "LLINEIN"},
 252         {"Line Input", NULL, "RLINEIN"},
 253         {"Mic Bias", NULL, "MICIN"},
 254 };
 255
 256 struct _coeff_div {
 257         u32 mclk;
 258         u32 rate;
 259         u16 fs;
 260         u8 sr:4;
 261         u8 bosr:1;
 262         u8 usb:1;
 263 };
 264
 265 /* codec mclk clock divider coefficients */
 266 static const struct _coeff_div coeff_div[] = {
 267         /* 48k */
 268         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 269         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 270         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 271
 272         /* 32k */
 273         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 274         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 275         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 276
 277         /* 8k */
 278         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 279         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 280         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 281         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 282         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 283
 284         /* 96k */
 285         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 286         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 287         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 288
 289         /* 44.1k */
 290         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 291         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 292         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 293
 294         /* 88.2k */
 295         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 296         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 297         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 298 };
 299
 300 /* rates constraints */
 301 static const unsigned int wm8731_rates_12000000[] = {
 302         8000, 32000, 44100, 48000, 96000, 88200,
 303 };
 304
 305 static const unsigned int wm8731_rates_12288000_18432000[] = {
 306         8000, 32000, 48000, 96000,
 307 };
 308
 309 static const unsigned int wm8731_rates_11289600_16934400[] = {
 310         8000, 44100, 88200,
 311 };
 312
 313 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
 314         .list = wm8731_rates_12000000,
 315         .count = ARRAY_SIZE(wm8731_rates_12000000),
 316 };
 317
 318 static const
 319 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
 320         .list = wm8731_rates_12288000_18432000,
 321         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
 322 };
 323
 324 static const
 325 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
 326         .list = wm8731_rates_11289600_16934400,
 327         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
 328 };
 329
 330 static inline int get_coeff(int mclk, int rate)
 331 {
 332         int i;
 333
 334         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 335                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 336                         return i;
 337         }
 338         return 0;
 339 }
 340
 341 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 342                             struct snd_pcm_hw_params *params,
 343                             struct snd_soc_dai *dai)
 344 {
 345         struct snd_soc_codec *codec = dai->codec;
 346         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 347         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 348         int i = get_coeff(wm8731->sysclk, params_rate(params));
 349         u16 srate = (coeff_div[i].sr << 2) |
 350                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 351
 352         wm8731->playback_fs = params_rate(params);
 353
 354         snd_soc_write(codec, WM8731_SRATE, srate);
 355
 356         /* bit size */
 357         switch (params_width(params)) {
 358         case 16:
 359                 break;
 360         case 20:
 361                 iface |= 0x0004;
 362                 break;
 363         case 24:
 364                 iface |= 0x0008;
 365                 break;
 366         }
 367
 368         wm8731_set_deemph(codec);
 369
 370         snd_soc_write(codec, WM8731_IFACE, iface);
 371         return 0;
 372 }
 373
 374 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 375 {
 376         struct snd_soc_codec *codec = dai->codec;
 377         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 378
 379         if (mute)
 380                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 381         else
 382                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 383         return 0;
 384 }
 385
 386 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 387                 int clk_id, unsigned int freq, int dir)
 388 {
 389         struct snd_soc_codec *codec = codec_dai->codec;
 390         struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
 391         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 392
 393         switch (clk_id) {
 394         case WM8731_SYSCLK_XTAL:
 395         case WM8731_SYSCLK_MCLK:
 396                 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
 397                         return -EINVAL;
 398                 wm8731->sysclk_type = clk_id;
 399                 break;
 400         default:
 401                 return -EINVAL;
 402         }
 403
 404         switch (freq) {
 405         case 0:
 406                 wm8731->constraints = NULL;
 407                 break;
 408         case 12000000:
 409                 wm8731->constraints = &wm8731_constraints_12000000;
 410                 break;
 411         case 12288000:
 412         case 18432000:
 413                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
 414                 break;
 415         case 16934400:
 416         case 11289600:
 417                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         wm8731->sysclk = freq;
 424
 425         snd_soc_dapm_sync(dapm);
 426
 427         return 0;
 428 }
 429
 430
 431 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 432                 unsigned int fmt)
 433 {
 434         struct snd_soc_codec *codec = codec_dai->codec;
 435         u16 iface = 0;
 436
 437         /* set master/slave audio interface */
 438         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 439         case SND_SOC_DAIFMT_CBM_CFM:
 440                 iface |= 0x0040;
 441                 break;
 442         case SND_SOC_DAIFMT_CBS_CFS:
 443                 break;
 444         default:
 445                 return -EINVAL;
 446         }
 447
 448         /* interface format */
 449         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 450         case SND_SOC_DAIFMT_I2S:
 451                 iface |= 0x0002;
 452                 break;
 453         case SND_SOC_DAIFMT_RIGHT_J:
 454                 break;
 455         case SND_SOC_DAIFMT_LEFT_J:
 456                 iface |= 0x0001;
 457                 break;
 458         case SND_SOC_DAIFMT_DSP_A:
 459                 iface |= 0x0013;
 460                 break;
 461         case SND_SOC_DAIFMT_DSP_B:
 462                 iface |= 0x0003;
 463                 break;
 464         default:
 465                 return -EINVAL;
 466         }
 467
 468         /* clock inversion */
 469         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 470         case SND_SOC_DAIFMT_NB_NF:
 471                 break;
 472         case SND_SOC_DAIFMT_IB_IF:
 473                 iface |= 0x0090;
 474                 break;
 475         case SND_SOC_DAIFMT_IB_NF:
 476                 iface |= 0x0080;
 477                 break;
 478         case SND_SOC_DAIFMT_NB_IF:
 479                 iface |= 0x0010;
 480                 break;
 481         default:
 482                 return -EINVAL;
 483         }
 484
 485         /* set iface */
 486         snd_soc_write(codec, WM8731_IFACE, iface);
 487         return 0;
 488 }
 489
 490 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 491                                  enum snd_soc_bias_level level)
 492 {
 493         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 494         int ret;
 495         u16 reg;
 496
 497         switch (level) {
 498         case SND_SOC_BIAS_ON:
 499                 if (wm8731->mclk)
 500                         clk_prepare_enable(wm8731->mclk);
 501                 break;
 502         case SND_SOC_BIAS_PREPARE:
 503                 break;
 504         case SND_SOC_BIAS_STANDBY:
 505                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 506                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 507                                                     wm8731->supplies);
 508                         if (ret != 0)
 509                                 return ret;
 510
 511                         regcache_sync(wm8731->regmap);
 512                 }
 513
 514                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 515                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 516                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 517                 break;
 518         case SND_SOC_BIAS_OFF:
 519                 if (wm8731->mclk)
 520                         clk_disable_unprepare(wm8731->mclk);
 521                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 522                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 523                                        wm8731->supplies);
 524                 regcache_mark_dirty(wm8731->regmap);
 525                 break;
 526         }
 527         return 0;
 528 }
 529
 530 static int wm8731_startup(struct snd_pcm_substream *substream,
 531         struct snd_soc_dai *dai)
 532 {
 533         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
 534
 535         if (wm8731->constraints)
 536                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 537                                            SNDRV_PCM_HW_PARAM_RATE,
 538                                            wm8731->constraints);
 539
 540         return 0;
 541 }
 542
 543 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 544
 545 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 546         SNDRV_PCM_FMTBIT_S24_LE)
 547
 548 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 549         .startup        = wm8731_startup,
 550         .hw_params      = wm8731_hw_params,
 551         .digital_mute   = wm8731_mute,
 552         .set_sysclk     = wm8731_set_dai_sysclk,
 553         .set_fmt        = wm8731_set_dai_fmt,
 554 };
 555
 556 static struct snd_soc_dai_driver wm8731_dai = {
 557         .name = "wm8731-hifi",
 558         .playback = {
 559                 .stream_name = "Playback",
 560                 .channels_min = 1,
 561                 .channels_max = 2,
 562                 .rates = WM8731_RATES,
 563                 .formats = WM8731_FORMATS,},
 564         .capture = {
 565                 .stream_name = "Capture",
 566                 .channels_min = 1,
 567                 .channels_max = 2,
 568                 .rates = WM8731_RATES,
 569                 .formats = WM8731_FORMATS,},
 570         .ops = &wm8731_dai_ops,
 571         .symmetric_rates = 1,
 572 };
 573
 574 static int wm8731_probe(struct snd_soc_codec *codec)
 575 {
 576         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 577         int ret = 0, i;
 578
 579         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 580                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 581
 582         ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 583                                  wm8731->supplies);
 584         if (ret != 0) {
 585                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 586                 return ret;
 587         }
 588
 589         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 590                                     wm8731->supplies);
 591         if (ret != 0) {
 592                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 593                 return ret;
 594         }
 595
 596         ret = wm8731_reset(codec);
 597         if (ret < 0) {
 598                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 599                 goto err_regulator_enable;
 600         }
 601
 602         snd_soc_codec_force_bias_level(codec, SND_SOC_BIAS_STANDBY);
 603
 604         /* Latch the update bits */
 605         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 606         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 607         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 608         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 609
 610         /* Disable bypass path by default */
 611         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 612
 613         /* Regulators will have been enabled by bias management */
 614         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 615
 616         return 0;
 617
 618 err_regulator_enable:
 619         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 620
 621         return ret;
 622 }
 623
 624 /* power down chip */
 625 static int wm8731_remove(struct snd_soc_codec *codec)
 626 {
 627         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 628
 629         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 630
 631         return 0;
 632 }
 633
 634 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 635         .probe =        wm8731_probe,
 636         .remove =       wm8731_remove,
 637         .set_bias_level = wm8731_set_bias_level,
 638         .suspend_bias_off = true,
 639
 640         .dapm_widgets = wm8731_dapm_widgets,
 641         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 642         .dapm_routes = wm8731_intercon,
 643         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 644         .controls =     wm8731_snd_controls,
 645         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
 646 };
 647
 648 static const struct of_device_id wm8731_of_match[] = {
 649         { .compatible = "wlf,wm8731", },
 650         { }
 651 };
 652
 653 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 654
 655 static const struct regmap_config wm8731_regmap = {
 656         .reg_bits = 7,
 657         .val_bits = 9,
 658
 659         .max_register = WM8731_RESET,
 660         .volatile_reg = wm8731_volatile,
 661         .writeable_reg = wm8731_writeable,
 662
 663         .cache_type = REGCACHE_RBTREE,
 664         .reg_defaults = wm8731_reg_defaults,
 665         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 666 };
 667
 668 #if defined(CONFIG_SPI_MASTER)
 669 static int wm8731_spi_probe(struct spi_device *spi)
 670 {
 671         struct wm8731_priv *wm8731;
 672         int ret;
 673
 674         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
 675         if (wm8731 == NULL)
 676                 return -ENOMEM;
 677
 678         wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
 679         if (IS_ERR(wm8731->mclk)) {
 680                 ret = PTR_ERR(wm8731->mclk);
 681                 if (ret == -ENOENT) {
 682                         wm8731->mclk = NULL;
 683                         dev_warn(&spi->dev, "Assuming static MCLK\n");
 684                 } else {
 685                         dev_err(&spi->dev, "Failed to get MCLK: %d\n",
 686                                 ret);
 687                         return ret;
 688                 }
 689         }
 690
 691         mutex_init(&wm8731->lock);
 692
 693         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 694         if (IS_ERR(wm8731->regmap)) {
 695                 ret = PTR_ERR(wm8731->regmap);
 696                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 697                         ret);
 698                 return ret;
 699         }
 700
 701         spi_set_drvdata(spi, wm8731);
 702
 703         ret = snd_soc_register_codec(&spi->dev,
 704                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 705         if (ret != 0) {
 706                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 707                 return ret;
 708         }
 709
 710         return 0;
 711 }
 712
 713 static int wm8731_spi_remove(struct spi_device *spi)
 714 {
 715         snd_soc_unregister_codec(&spi->dev);
 716         return 0;
 717 }
 718
 719 static struct spi_driver wm8731_spi_driver = {
 720         .driver = {
 721                 .name   = "wm8731",
 722                 .owner  = THIS_MODULE,
 723                 .of_match_table = wm8731_of_match,
 724         },
 725         .probe          = wm8731_spi_probe,
 726         .remove         = wm8731_spi_remove,
 727 };
 728 #endif /* CONFIG_SPI_MASTER */
 729
 730 #if IS_ENABLED(CONFIG_I2C)
 731 static int wm8731_i2c_probe(struct i2c_client *i2c,
 732                             const struct i2c_device_id *id)
 733 {
 734         struct wm8731_priv *wm8731;
 735         int ret;
 736
 737         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 738                               GFP_KERNEL);
 739         if (wm8731 == NULL)
 740                 return -ENOMEM;
 741
 742         wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
 743         if (IS_ERR(wm8731->mclk)) {
 744                 ret = PTR_ERR(wm8731->mclk);
 745                 if (ret == -ENOENT) {
 746                         wm8731->mclk = NULL;
 747                         dev_warn(&i2c->dev, "Assuming static MCLK\n");
 748                 } else {
 749                         dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
 750                                 ret);
 751                         return ret;
 752                 }
 753         }
 754
 755         mutex_init(&wm8731->lock);
 756
 757         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 758         if (IS_ERR(wm8731->regmap)) {
 759                 ret = PTR_ERR(wm8731->regmap);
 760                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 761                         ret);
 762                 return ret;
 763         }
 764
 765         i2c_set_clientdata(i2c, wm8731);
 766
 767         ret = snd_soc_register_codec(&i2c->dev,
 768                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 769         if (ret != 0) {
 770                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 771                 return ret;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static int wm8731_i2c_remove(struct i2c_client *client)
 778 {
 779         snd_soc_unregister_codec(&client->dev);
 780         return 0;
 781 }
 782
 783 static const struct i2c_device_id wm8731_i2c_id[] = {
 784         { "wm8731", 0 },
 785         { }
 786 };
 787 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 788
 789 static struct i2c_driver wm8731_i2c_driver = {
 790         .driver = {
 791                 .name = "wm8731",
 792                 .owner = THIS_MODULE,
 793                 .of_match_table = wm8731_of_match,
 794         },
 795         .probe =    wm8731_i2c_probe,
 796         .remove =   wm8731_i2c_remove,
 797         .id_table = wm8731_i2c_id,
 798 };
 799 #endif
 800
 801 static int __init wm8731_modinit(void)
 802 {
 803         int ret = 0;
 804 #if IS_ENABLED(CONFIG_I2C)
 805         ret = i2c_add_driver(&wm8731_i2c_driver);
 806         if (ret != 0) {
 807                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 808                        ret);
 809         }
 810 #endif
 811 #if defined(CONFIG_SPI_MASTER)
 812         ret = spi_register_driver(&wm8731_spi_driver);
 813         if (ret != 0) {
 814                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 815                        ret);
 816         }
 817 #endif
 818         return ret;
 819 }
 820 module_init(wm8731_modinit);
 821
 822 static void __exit wm8731_exit(void)
 823 {
 824 #if IS_ENABLED(CONFIG_I2C)
 825         i2c_del_driver(&wm8731_i2c_driver);
 826 #endif
 827 #if defined(CONFIG_SPI_MASTER)
 828         spi_unregister_driver(&wm8731_spi_driver);
 829 #endif
 830 }
 831 module_exit(wm8731_exit);
 832
 833 MODULE_DESCRIPTION("ASoC WM8731 driver");
 834 MODULE_AUTHOR("Richard Purdie");
 835 MODULE_LICENSE("GPL");