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 wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 221
 222         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 223 }
 224
 225 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 226         {"DAC", NULL, "OSC", wm8731_check_osc},
 227         {"ADC", NULL, "OSC", wm8731_check_osc},
 228         {"DAC", NULL, "ACTIVE"},
 229         {"ADC", NULL, "ACTIVE"},
 230
 231         /* output mixer */
 232         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 233         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 234         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 235
 236         /* outputs */
 237         {"RHPOUT", NULL, "Output Mixer"},
 238         {"ROUT", NULL, "Output Mixer"},
 239         {"LHPOUT", NULL, "Output Mixer"},
 240         {"LOUT", NULL, "Output Mixer"},
 241
 242         /* input mux */
 243         {"Input Mux", "Line In", "Line Input"},
 244         {"Input Mux", "Mic", "Mic Bias"},
 245         {"ADC", NULL, "Input Mux"},
 246
 247         /* inputs */
 248         {"Line Input", NULL, "LLINEIN"},
 249         {"Line Input", NULL, "RLINEIN"},
 250         {"Mic Bias", NULL, "MICIN"},
 251 };
 252
 253 struct _coeff_div {
 254         u32 mclk;
 255         u32 rate;
 256         u16 fs;
 257         u8 sr:4;
 258         u8 bosr:1;
 259         u8 usb:1;
 260 };
 261
 262 /* codec mclk clock divider coefficients */
 263 static const struct _coeff_div coeff_div[] = {
 264         /* 48k */
 265         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 266         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 267         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 268
 269         /* 32k */
 270         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 271         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 272         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 273
 274         /* 8k */
 275         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 276         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 277         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 278         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 279         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 280
 281         /* 96k */
 282         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 283         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 284         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 285
 286         /* 44.1k */
 287         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 288         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 289         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 290
 291         /* 88.2k */
 292         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 293         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 294         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 295 };
 296
 297 /* rates constraints */
 298 static const unsigned int wm8731_rates_12000000[] = {
 299         8000, 32000, 44100, 48000, 96000, 88200,
 300 };
 301
 302 static const unsigned int wm8731_rates_12288000_18432000[] = {
 303         8000, 32000, 48000, 96000,
 304 };
 305
 306 static const unsigned int wm8731_rates_11289600_16934400[] = {
 307         8000, 44100, 88200,
 308 };
 309
 310 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
 311         .list = wm8731_rates_12000000,
 312         .count = ARRAY_SIZE(wm8731_rates_12000000),
 313 };
 314
 315 static const
 316 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
 317         .list = wm8731_rates_12288000_18432000,
 318         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
 319 };
 320
 321 static const
 322 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
 323         .list = wm8731_rates_11289600_16934400,
 324         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
 325 };
 326
 327 static inline int get_coeff(int mclk, int rate)
 328 {
 329         int i;
 330
 331         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 332                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 333                         return i;
 334         }
 335         return 0;
 336 }
 337
 338 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 339                             struct snd_pcm_hw_params *params,
 340                             struct snd_soc_dai *dai)
 341 {
 342         struct snd_soc_codec *codec = dai->codec;
 343         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 344         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 345         int i = get_coeff(wm8731->sysclk, params_rate(params));
 346         u16 srate = (coeff_div[i].sr << 2) |
 347                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 348
 349         wm8731->playback_fs = params_rate(params);
 350
 351         snd_soc_write(codec, WM8731_SRATE, srate);
 352
 353         /* bit size */
 354         switch (params_width(params)) {
 355         case 16:
 356                 break;
 357         case 20:
 358                 iface |= 0x0004;
 359                 break;
 360         case 24:
 361                 iface |= 0x0008;
 362                 break;
 363         }
 364
 365         wm8731_set_deemph(codec);
 366
 367         snd_soc_write(codec, WM8731_IFACE, iface);
 368         return 0;
 369 }
 370
 371 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 372 {
 373         struct snd_soc_codec *codec = dai->codec;
 374         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 375
 376         if (mute)
 377                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 378         else
 379                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 380         return 0;
 381 }
 382
 383 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 384                 int clk_id, unsigned int freq, int dir)
 385 {
 386         struct snd_soc_codec *codec = codec_dai->codec;
 387         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 388
 389         switch (clk_id) {
 390         case WM8731_SYSCLK_XTAL:
 391         case WM8731_SYSCLK_MCLK:
 392                 wm8731->sysclk_type = clk_id;
 393                 break;
 394         default:
 395                 return -EINVAL;
 396         }
 397
 398         switch (freq) {
 399         case 0:
 400                 wm8731->constraints = NULL;
 401                 break;
 402         case 12000000:
 403                 wm8731->constraints = &wm8731_constraints_12000000;
 404                 break;
 405         case 12288000:
 406         case 18432000:
 407                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
 408                 break;
 409         case 16934400:
 410         case 11289600:
 411                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
 412                 break;
 413         default:
 414                 return -EINVAL;
 415         }
 416
 417         wm8731->sysclk = freq;
 418
 419         snd_soc_dapm_sync(&codec->dapm);
 420
 421         return 0;
 422 }
 423
 424
 425 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 426                 unsigned int fmt)
 427 {
 428         struct snd_soc_codec *codec = codec_dai->codec;
 429         u16 iface = 0;
 430
 431         /* set master/slave audio interface */
 432         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 433         case SND_SOC_DAIFMT_CBM_CFM:
 434                 iface |= 0x0040;
 435                 break;
 436         case SND_SOC_DAIFMT_CBS_CFS:
 437                 break;
 438         default:
 439                 return -EINVAL;
 440         }
 441
 442         /* interface format */
 443         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 444         case SND_SOC_DAIFMT_I2S:
 445                 iface |= 0x0002;
 446                 break;
 447         case SND_SOC_DAIFMT_RIGHT_J:
 448                 break;
 449         case SND_SOC_DAIFMT_LEFT_J:
 450                 iface |= 0x0001;
 451                 break;
 452         case SND_SOC_DAIFMT_DSP_A:
 453                 iface |= 0x0013;
 454                 break;
 455         case SND_SOC_DAIFMT_DSP_B:
 456                 iface |= 0x0003;
 457                 break;
 458         default:
 459                 return -EINVAL;
 460         }
 461
 462         /* clock inversion */
 463         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 464         case SND_SOC_DAIFMT_NB_NF:
 465                 break;
 466         case SND_SOC_DAIFMT_IB_IF:
 467                 iface |= 0x0090;
 468                 break;
 469         case SND_SOC_DAIFMT_IB_NF:
 470                 iface |= 0x0080;
 471                 break;
 472         case SND_SOC_DAIFMT_NB_IF:
 473                 iface |= 0x0010;
 474                 break;
 475         default:
 476                 return -EINVAL;
 477         }
 478
 479         /* set iface */
 480         snd_soc_write(codec, WM8731_IFACE, iface);
 481         return 0;
 482 }
 483
 484 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 485                                  enum snd_soc_bias_level level)
 486 {
 487         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 488         int ret;
 489         u16 reg;
 490
 491         switch (level) {
 492         case SND_SOC_BIAS_ON:
 493                 break;
 494         case SND_SOC_BIAS_PREPARE:
 495                 break;
 496         case SND_SOC_BIAS_STANDBY:
 497                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 498                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 499                                                     wm8731->supplies);
 500                         if (ret != 0)
 501                                 return ret;
 502
 503                         regcache_sync(wm8731->regmap);
 504                 }
 505
 506                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 507                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 508                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 509                 break;
 510         case SND_SOC_BIAS_OFF:
 511                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 512                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 513                                        wm8731->supplies);
 514                 regcache_mark_dirty(wm8731->regmap);
 515                 break;
 516         }
 517         codec->dapm.bias_level = level;
 518         return 0;
 519 }
 520
 521 static int wm8731_startup(struct snd_pcm_substream *substream,
 522         struct snd_soc_dai *dai)
 523 {
 524         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
 525
 526         if (wm8731->constraints)
 527                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 528                                            SNDRV_PCM_HW_PARAM_RATE,
 529                                            wm8731->constraints);
 530
 531         return 0;
 532 }
 533
 534 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 535
 536 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 537         SNDRV_PCM_FMTBIT_S24_LE)
 538
 539 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 540         .startup        = wm8731_startup,
 541         .hw_params      = wm8731_hw_params,
 542         .digital_mute   = wm8731_mute,
 543         .set_sysclk     = wm8731_set_dai_sysclk,
 544         .set_fmt        = wm8731_set_dai_fmt,
 545 };
 546
 547 static struct snd_soc_dai_driver wm8731_dai = {
 548         .name = "wm8731-hifi",
 549         .playback = {
 550                 .stream_name = "Playback",
 551                 .channels_min = 1,
 552                 .channels_max = 2,
 553                 .rates = WM8731_RATES,
 554                 .formats = WM8731_FORMATS,},
 555         .capture = {
 556                 .stream_name = "Capture",
 557                 .channels_min = 1,
 558                 .channels_max = 2,
 559                 .rates = WM8731_RATES,
 560                 .formats = WM8731_FORMATS,},
 561         .ops = &wm8731_dai_ops,
 562         .symmetric_rates = 1,
 563 };
 564
 565 static int wm8731_probe(struct snd_soc_codec *codec)
 566 {
 567         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 568         int ret = 0, i;
 569
 570         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 571                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 572
 573         ret = devm_regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 574                                  wm8731->supplies);
 575         if (ret != 0) {
 576                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 577                 return ret;
 578         }
 579
 580         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 581                                     wm8731->supplies);
 582         if (ret != 0) {
 583                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 584                 return ret;
 585         }
 586
 587         ret = wm8731_reset(codec);
 588         if (ret < 0) {
 589                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 590                 goto err_regulator_enable;
 591         }
 592
 593         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 594
 595         /* Latch the update bits */
 596         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 597         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 598         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 599         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 600
 601         /* Disable bypass path by default */
 602         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 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
 612         return ret;
 613 }
 614
 615 /* power down chip */
 616 static int wm8731_remove(struct snd_soc_codec *codec)
 617 {
 618         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 619
 620         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 621
 622         return 0;
 623 }
 624
 625 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 626         .probe =        wm8731_probe,
 627         .remove =       wm8731_remove,
 628         .set_bias_level = wm8731_set_bias_level,
 629         .suspend_bias_off = true,
 630
 631         .dapm_widgets = wm8731_dapm_widgets,
 632         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 633         .dapm_routes = wm8731_intercon,
 634         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 635         .controls =     wm8731_snd_controls,
 636         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
 637 };
 638
 639 static const struct of_device_id wm8731_of_match[] = {
 640         { .compatible = "wlf,wm8731", },
 641         { }
 642 };
 643
 644 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 645
 646 static const struct regmap_config wm8731_regmap = {
 647         .reg_bits = 7,
 648         .val_bits = 9,
 649
 650         .max_register = WM8731_RESET,
 651         .volatile_reg = wm8731_volatile,
 652         .writeable_reg = wm8731_writeable,
 653
 654         .cache_type = REGCACHE_RBTREE,
 655         .reg_defaults = wm8731_reg_defaults,
 656         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 657 };
 658
 659 #if defined(CONFIG_SPI_MASTER)
 660 static int wm8731_spi_probe(struct spi_device *spi)
 661 {
 662         struct wm8731_priv *wm8731;
 663         int ret;
 664
 665         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
 666         if (wm8731 == NULL)
 667                 return -ENOMEM;
 668
 669         mutex_init(&wm8731->lock);
 670
 671         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 672         if (IS_ERR(wm8731->regmap)) {
 673                 ret = PTR_ERR(wm8731->regmap);
 674                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 675                         ret);
 676                 return ret;
 677         }
 678
 679         spi_set_drvdata(spi, wm8731);
 680
 681         ret = snd_soc_register_codec(&spi->dev,
 682                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 683         if (ret != 0) {
 684                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 685                 return ret;
 686         }
 687
 688         return 0;
 689 }
 690
 691 static int wm8731_spi_remove(struct spi_device *spi)
 692 {
 693         snd_soc_unregister_codec(&spi->dev);
 694         return 0;
 695 }
 696
 697 static struct spi_driver wm8731_spi_driver = {
 698         .driver = {
 699                 .name   = "wm8731",
 700                 .owner  = THIS_MODULE,
 701                 .of_match_table = wm8731_of_match,
 702         },
 703         .probe          = wm8731_spi_probe,
 704         .remove         = wm8731_spi_remove,
 705 };
 706 #endif /* CONFIG_SPI_MASTER */
 707
 708 #if IS_ENABLED(CONFIG_I2C)
 709 static int wm8731_i2c_probe(struct i2c_client *i2c,
 710                             const struct i2c_device_id *id)
 711 {
 712         struct wm8731_priv *wm8731;
 713         int ret;
 714
 715         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 716                               GFP_KERNEL);
 717         if (wm8731 == NULL)
 718                 return -ENOMEM;
 719
 720         mutex_init(&wm8731->lock);
 721
 722         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 723         if (IS_ERR(wm8731->regmap)) {
 724                 ret = PTR_ERR(wm8731->regmap);
 725                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 726                         ret);
 727                 return ret;
 728         }
 729
 730         i2c_set_clientdata(i2c, wm8731);
 731
 732         ret = snd_soc_register_codec(&i2c->dev,
 733                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 734         if (ret != 0) {
 735                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 736                 return ret;
 737         }
 738
 739         return 0;
 740 }
 741
 742 static int wm8731_i2c_remove(struct i2c_client *client)
 743 {
 744         snd_soc_unregister_codec(&client->dev);
 745         return 0;
 746 }
 747
 748 static const struct i2c_device_id wm8731_i2c_id[] = {
 749         { "wm8731", 0 },
 750         { }
 751 };
 752 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 753
 754 static struct i2c_driver wm8731_i2c_driver = {
 755         .driver = {
 756                 .name = "wm8731",
 757                 .owner = THIS_MODULE,
 758                 .of_match_table = wm8731_of_match,
 759         },
 760         .probe =    wm8731_i2c_probe,
 761         .remove =   wm8731_i2c_remove,
 762         .id_table = wm8731_i2c_id,
 763 };
 764 #endif
 765
 766 static int __init wm8731_modinit(void)
 767 {
 768         int ret = 0;
 769 #if IS_ENABLED(CONFIG_I2C)
 770         ret = i2c_add_driver(&wm8731_i2c_driver);
 771         if (ret != 0) {
 772                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 773                        ret);
 774         }
 775 #endif
 776 #if defined(CONFIG_SPI_MASTER)
 777         ret = spi_register_driver(&wm8731_spi_driver);
 778         if (ret != 0) {
 779                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 780                        ret);
 781         }
 782 #endif
 783         return ret;
 784 }
 785 module_init(wm8731_modinit);
 786
 787 static void __exit wm8731_exit(void)
 788 {
 789 #if IS_ENABLED(CONFIG_I2C)
 790         i2c_del_driver(&wm8731_i2c_driver);
 791 #endif
 792 #if defined(CONFIG_SPI_MASTER)
 793         spi_unregister_driver(&wm8731_spi_driver);
 794 #endif
 795 }
 796 module_exit(wm8731_exit);
 797
 798 MODULE_DESCRIPTION("ASoC WM8731 driver");
 799 MODULE_AUTHOR("Richard Purdie");
 800 MODULE_LICENSE("GPL");