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 <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/soc.h>
  31 #include <sound/initval.h>
  32 #include <sound/tlv.h>
  33
  34 #include "wm8731.h"
  35
  36 #define WM8731_NUM_SUPPLIES 4
  37 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  38         "AVDD",
  39         "HPVDD",
  40         "DCVDD",
  41         "DBVDD",
  42 };
  43
  44 /* codec private data */
  45 struct wm8731_priv {
  46         struct regmap *regmap;
  47         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  48         const struct snd_pcm_hw_constraint_list *constraints;
  49         unsigned int sysclk;
  50         int sysclk_type;
  51         int playback_fs;
  52         bool deemph;
  53 };
  54
  55
  56 /*
  57  * wm8731 register cache
  58  */
  59 static const struct reg_default wm8731_reg_defaults[] = {
  60         { 0, 0x0097 },
  61         { 1, 0x0097 },
  62         { 2, 0x0079 },
  63         { 3, 0x0079 },
  64         { 4, 0x000a },
  65         { 5, 0x0008 },
  66         { 6, 0x009f },
  67         { 7, 0x000a },
  68         { 8, 0x0000 },
  69         { 9, 0x0000 },
  70 };
  71
  72 static bool wm8731_volatile(struct device *dev, unsigned int reg)
  73 {
  74         return reg == WM8731_RESET;
  75 }
  76
  77 static bool wm8731_writeable(struct device *dev, unsigned int reg)
  78 {
  79         return reg <= WM8731_RESET;
  80 }
  81
  82 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  83
  84 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  85
  86 static const struct soc_enum wm8731_insel_enum =
  87         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
  88
  89 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  90
  91 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  92 {
  93         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  94         int val, i, best;
  95
  96         /* If we're using deemphasis select the nearest available sample
  97          * rate.
  98          */
  99         if (wm8731->deemph) {
 100                 best = 1;
 101                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
 102                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
 103                             abs(wm8731_deemph[best] - wm8731->playback_fs))
 104                                 best = i;
 105                 }
 106
 107                 val = best << 1;
 108         } else {
 109                 best = 0;
 110                 val = 0;
 111         }
 112
 113         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
 114                 best, wm8731_deemph[best]);
 115
 116         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 117 }
 118
 119 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 120                              struct snd_ctl_elem_value *ucontrol)
 121 {
 122         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 123         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 124
 125         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 126
 127         return 0;
 128 }
 129
 130 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 131                              struct snd_ctl_elem_value *ucontrol)
 132 {
 133         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 134         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 135         int deemph = ucontrol->value.enumerated.item[0];
 136         int ret = 0;
 137
 138         if (deemph > 1)
 139                 return -EINVAL;
 140
 141         mutex_lock(&codec->mutex);
 142         if (wm8731->deemph != deemph) {
 143                 wm8731->deemph = deemph;
 144
 145                 wm8731_set_deemph(codec);
 146
 147                 ret = 1;
 148         }
 149         mutex_unlock(&codec->mutex);
 150
 151         return ret;
 152 }
 153
 154 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 155 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 156 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 157 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 158
 159 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 160
 161 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 162                  0, 127, 0, out_tlv),
 163 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 164         7, 1, 0),
 165
 166 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 167                  in_tlv),
 168 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 169
 170 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 171 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 172
 173 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 174                sidetone_tlv),
 175
 176 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 177 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 178
 179 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 180                     wm8731_get_deemph, wm8731_put_deemph),
 181 };
 182
 183 /* Output Mixer */
 184 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 186 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 187 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 188 };
 189
 190 /* Input mux */
 191 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 192 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 193
 194 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 195 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 196 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 197 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 198         &wm8731_output_mixer_controls[0],
 199         ARRAY_SIZE(wm8731_output_mixer_controls)),
 200 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 201 SND_SOC_DAPM_OUTPUT("LOUT"),
 202 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 203 SND_SOC_DAPM_OUTPUT("ROUT"),
 204 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 205 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 206 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 207 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 208 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 209 SND_SOC_DAPM_INPUT("MICIN"),
 210 SND_SOC_DAPM_INPUT("RLINEIN"),
 211 SND_SOC_DAPM_INPUT("LLINEIN"),
 212 };
 213
 214 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 215                             struct snd_soc_dapm_widget *sink)
 216 {
 217         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 218
 219         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 220 }
 221
 222 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 223         {"DAC", NULL, "OSC", wm8731_check_osc},
 224         {"ADC", NULL, "OSC", wm8731_check_osc},
 225         {"DAC", NULL, "ACTIVE"},
 226         {"ADC", NULL, "ACTIVE"},
 227
 228         /* output mixer */
 229         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 230         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 231         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 232
 233         /* outputs */
 234         {"RHPOUT", NULL, "Output Mixer"},
 235         {"ROUT", NULL, "Output Mixer"},
 236         {"LHPOUT", NULL, "Output Mixer"},
 237         {"LOUT", NULL, "Output Mixer"},
 238
 239         /* input mux */
 240         {"Input Mux", "Line In", "Line Input"},
 241         {"Input Mux", "Mic", "Mic Bias"},
 242         {"ADC", NULL, "Input Mux"},
 243
 244         /* inputs */
 245         {"Line Input", NULL, "LLINEIN"},
 246         {"Line Input", NULL, "RLINEIN"},
 247         {"Mic Bias", NULL, "MICIN"},
 248 };
 249
 250 struct _coeff_div {
 251         u32 mclk;
 252         u32 rate;
 253         u16 fs;
 254         u8 sr:4;
 255         u8 bosr:1;
 256         u8 usb:1;
 257 };
 258
 259 /* codec mclk clock divider coefficients */
 260 static const struct _coeff_div coeff_div[] = {
 261         /* 48k */
 262         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 263         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 264         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 265
 266         /* 32k */
 267         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 268         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 269         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 270
 271         /* 8k */
 272         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 273         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 274         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 275         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 276         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 277
 278         /* 96k */
 279         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 280         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 281         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 282
 283         /* 44.1k */
 284         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 285         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 286         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 287
 288         /* 88.2k */
 289         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 290         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 291         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 292 };
 293
 294 /* rates constraints */
 295 static const unsigned int wm8731_rates_12000000[] = {
 296         8000, 32000, 44100, 48000, 96000, 88200,
 297 };
 298
 299 static const unsigned int wm8731_rates_12288000_18432000[] = {
 300         8000, 32000, 48000, 96000,
 301 };
 302
 303 static const unsigned int wm8731_rates_11289600_16934400[] = {
 304         8000, 44100, 88200,
 305 };
 306
 307 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
 308         .list = wm8731_rates_12000000,
 309         .count = ARRAY_SIZE(wm8731_rates_12000000),
 310 };
 311
 312 static const
 313 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
 314         .list = wm8731_rates_12288000_18432000,
 315         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
 316 };
 317
 318 static const
 319 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
 320         .list = wm8731_rates_11289600_16934400,
 321         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
 322 };
 323
 324 static inline int get_coeff(int mclk, int rate)
 325 {
 326         int i;
 327
 328         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 329                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 330                         return i;
 331         }
 332         return 0;
 333 }
 334
 335 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 336                             struct snd_pcm_hw_params *params,
 337                             struct snd_soc_dai *dai)
 338 {
 339         struct snd_soc_codec *codec = dai->codec;
 340         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 341         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 342         int i = get_coeff(wm8731->sysclk, params_rate(params));
 343         u16 srate = (coeff_div[i].sr << 2) |
 344                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 345
 346         wm8731->playback_fs = params_rate(params);
 347
 348         snd_soc_write(codec, WM8731_SRATE, srate);
 349
 350         /* bit size */
 351         switch (params_format(params)) {
 352         case SNDRV_PCM_FORMAT_S16_LE:
 353                 break;
 354         case SNDRV_PCM_FORMAT_S20_3LE:
 355                 iface |= 0x0004;
 356                 break;
 357         case SNDRV_PCM_FORMAT_S24_LE:
 358                 iface |= 0x0008;
 359                 break;
 360         }
 361
 362         wm8731_set_deemph(codec);
 363
 364         snd_soc_write(codec, WM8731_IFACE, iface);
 365         return 0;
 366 }
 367
 368 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 369 {
 370         struct snd_soc_codec *codec = dai->codec;
 371         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 372
 373         if (mute)
 374                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 375         else
 376                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 377         return 0;
 378 }
 379
 380 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 381                 int clk_id, unsigned int freq, int dir)
 382 {
 383         struct snd_soc_codec *codec = codec_dai->codec;
 384         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 385
 386         switch (clk_id) {
 387         case WM8731_SYSCLK_XTAL:
 388         case WM8731_SYSCLK_MCLK:
 389                 wm8731->sysclk_type = clk_id;
 390                 break;
 391         default:
 392                 return -EINVAL;
 393         }
 394
 395         switch (freq) {
 396         case 0:
 397                 wm8731->constraints = NULL;
 398                 break;
 399         case 12000000:
 400                 wm8731->constraints = &wm8731_constraints_12000000;
 401                 break;
 402         case 12288000:
 403         case 18432000:
 404                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
 405                 break;
 406         case 16934400:
 407         case 11289600:
 408                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
 409                 break;
 410         default:
 411                 return -EINVAL;
 412         }
 413
 414         wm8731->sysclk = freq;
 415
 416         snd_soc_dapm_sync(&codec->dapm);
 417
 418         return 0;
 419 }
 420
 421
 422 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 423                 unsigned int fmt)
 424 {
 425         struct snd_soc_codec *codec = codec_dai->codec;
 426         u16 iface = 0;
 427
 428         /* set master/slave audio interface */
 429         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 430         case SND_SOC_DAIFMT_CBM_CFM:
 431                 iface |= 0x0040;
 432                 break;
 433         case SND_SOC_DAIFMT_CBS_CFS:
 434                 break;
 435         default:
 436                 return -EINVAL;
 437         }
 438
 439         /* interface format */
 440         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 441         case SND_SOC_DAIFMT_I2S:
 442                 iface |= 0x0002;
 443                 break;
 444         case SND_SOC_DAIFMT_RIGHT_J:
 445                 break;
 446         case SND_SOC_DAIFMT_LEFT_J:
 447                 iface |= 0x0001;
 448                 break;
 449         case SND_SOC_DAIFMT_DSP_A:
 450                 iface |= 0x0003;
 451                 break;
 452         case SND_SOC_DAIFMT_DSP_B:
 453                 iface |= 0x0013;
 454                 break;
 455         default:
 456                 return -EINVAL;
 457         }
 458
 459         /* clock inversion */
 460         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 461         case SND_SOC_DAIFMT_NB_NF:
 462                 break;
 463         case SND_SOC_DAIFMT_IB_IF:
 464                 iface |= 0x0090;
 465                 break;
 466         case SND_SOC_DAIFMT_IB_NF:
 467                 iface |= 0x0080;
 468                 break;
 469         case SND_SOC_DAIFMT_NB_IF:
 470                 iface |= 0x0010;
 471                 break;
 472         default:
 473                 return -EINVAL;
 474         }
 475
 476         /* set iface */
 477         snd_soc_write(codec, WM8731_IFACE, iface);
 478         return 0;
 479 }
 480
 481 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 482                                  enum snd_soc_bias_level level)
 483 {
 484         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 485         int ret;
 486         u16 reg;
 487
 488         switch (level) {
 489         case SND_SOC_BIAS_ON:
 490                 break;
 491         case SND_SOC_BIAS_PREPARE:
 492                 break;
 493         case SND_SOC_BIAS_STANDBY:
 494                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 495                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 496                                                     wm8731->supplies);
 497                         if (ret != 0)
 498                                 return ret;
 499
 500                         regcache_sync(wm8731->regmap);
 501                 }
 502
 503                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 504                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 505                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 506                 break;
 507         case SND_SOC_BIAS_OFF:
 508                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 509                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 510                                        wm8731->supplies);
 511                 regcache_mark_dirty(wm8731->regmap);
 512                 break;
 513         }
 514         codec->dapm.bias_level = level;
 515         return 0;
 516 }
 517
 518 static int wm8731_startup(struct snd_pcm_substream *substream,
 519         struct snd_soc_dai *dai)
 520 {
 521         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
 522
 523         if (wm8731->constraints)
 524                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 525                                            SNDRV_PCM_HW_PARAM_RATE,
 526                                            wm8731->constraints);
 527
 528         return 0;
 529 }
 530
 531 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 532
 533 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 534         SNDRV_PCM_FMTBIT_S24_LE)
 535
 536 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 537         .startup        = wm8731_startup,
 538         .hw_params      = wm8731_hw_params,
 539         .digital_mute   = wm8731_mute,
 540         .set_sysclk     = wm8731_set_dai_sysclk,
 541         .set_fmt        = wm8731_set_dai_fmt,
 542 };
 543
 544 static struct snd_soc_dai_driver wm8731_dai = {
 545         .name = "wm8731-hifi",
 546         .playback = {
 547                 .stream_name = "Playback",
 548                 .channels_min = 1,
 549                 .channels_max = 2,
 550                 .rates = WM8731_RATES,
 551                 .formats = WM8731_FORMATS,},
 552         .capture = {
 553                 .stream_name = "Capture",
 554                 .channels_min = 1,
 555                 .channels_max = 2,
 556                 .rates = WM8731_RATES,
 557                 .formats = WM8731_FORMATS,},
 558         .ops = &wm8731_dai_ops,
 559         .symmetric_rates = 1,
 560 };
 561
 562 #ifdef CONFIG_PM
 563 static int wm8731_suspend(struct snd_soc_codec *codec)
 564 {
 565         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 566
 567         return 0;
 568 }
 569
 570 static int wm8731_resume(struct snd_soc_codec *codec)
 571 {
 572         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 573
 574         return 0;
 575 }
 576 #else
 577 #define wm8731_suspend NULL
 578 #define wm8731_resume NULL
 579 #endif
 580
 581 static int wm8731_probe(struct snd_soc_codec *codec)
 582 {
 583         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 584         int ret = 0, i;
 585
 586         codec->control_data = wm8731->regmap;
 587         ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
 588         if (ret < 0) {
 589                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 590                 return ret;
 591         }
 592
 593         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 594                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 595
 596         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 597                                  wm8731->supplies);
 598         if (ret != 0) {
 599                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 600                 return ret;
 601         }
 602
 603         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 604                                     wm8731->supplies);
 605         if (ret != 0) {
 606                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 607                 goto err_regulator_get;
 608         }
 609
 610         ret = wm8731_reset(codec);
 611         if (ret < 0) {
 612                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 613                 goto err_regulator_enable;
 614         }
 615
 616         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 617
 618         /* Latch the update bits */
 619         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 620         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 621         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 622         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 623
 624         /* Disable bypass path by default */
 625         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 626
 627         /* Regulators will have been enabled by bias management */
 628         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 629
 630         return 0;
 631
 632 err_regulator_enable:
 633         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 634 err_regulator_get:
 635         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 636
 637         return ret;
 638 }
 639
 640 /* power down chip */
 641 static int wm8731_remove(struct snd_soc_codec *codec)
 642 {
 643         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 644
 645         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 646
 647         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 648         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 649
 650         return 0;
 651 }
 652
 653 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 654         .probe =        wm8731_probe,
 655         .remove =       wm8731_remove,
 656         .suspend =      wm8731_suspend,
 657         .resume =       wm8731_resume,
 658         .set_bias_level = wm8731_set_bias_level,
 659         .dapm_widgets = wm8731_dapm_widgets,
 660         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 661         .dapm_routes = wm8731_intercon,
 662         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 663         .controls =     wm8731_snd_controls,
 664         .num_controls = ARRAY_SIZE(wm8731_snd_controls),
 665 };
 666
 667 static const struct of_device_id wm8731_of_match[] = {
 668         { .compatible = "wlf,wm8731", },
 669         { }
 670 };
 671
 672 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 673
 674 static const struct regmap_config wm8731_regmap = {
 675         .reg_bits = 7,
 676         .val_bits = 9,
 677
 678         .max_register = WM8731_RESET,
 679         .volatile_reg = wm8731_volatile,
 680         .writeable_reg = wm8731_writeable,
 681
 682         .cache_type = REGCACHE_RBTREE,
 683         .reg_defaults = wm8731_reg_defaults,
 684         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 685 };
 686
 687 #if defined(CONFIG_SPI_MASTER)
 688 static int wm8731_spi_probe(struct spi_device *spi)
 689 {
 690         struct wm8731_priv *wm8731;
 691         int ret;
 692
 693         wm8731 = devm_kzalloc(&spi->dev, sizeof(struct wm8731_priv),
 694                               GFP_KERNEL);
 695         if (wm8731 == NULL)
 696                 return -ENOMEM;
 697
 698         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 699         if (IS_ERR(wm8731->regmap)) {
 700                 ret = PTR_ERR(wm8731->regmap);
 701                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 702                         ret);
 703                 return ret;
 704         }
 705
 706         spi_set_drvdata(spi, wm8731);
 707
 708         ret = snd_soc_register_codec(&spi->dev,
 709                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 710         if (ret != 0) {
 711                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 712                 return ret;
 713         }
 714
 715         return 0;
 716 }
 717
 718 static int wm8731_spi_remove(struct spi_device *spi)
 719 {
 720         snd_soc_unregister_codec(&spi->dev);
 721         return 0;
 722 }
 723
 724 static struct spi_driver wm8731_spi_driver = {
 725         .driver = {
 726                 .name   = "wm8731",
 727                 .owner  = THIS_MODULE,
 728                 .of_match_table = wm8731_of_match,
 729         },
 730         .probe          = wm8731_spi_probe,
 731         .remove         = wm8731_spi_remove,
 732 };
 733 #endif /* CONFIG_SPI_MASTER */
 734
 735 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 736 static int wm8731_i2c_probe(struct i2c_client *i2c,
 737                             const struct i2c_device_id *id)
 738 {
 739         struct wm8731_priv *wm8731;
 740         int ret;
 741
 742         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 743                               GFP_KERNEL);
 744         if (wm8731 == NULL)
 745                 return -ENOMEM;
 746
 747         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 748         if (IS_ERR(wm8731->regmap)) {
 749                 ret = PTR_ERR(wm8731->regmap);
 750                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 751                         ret);
 752                 return ret;
 753         }
 754
 755         i2c_set_clientdata(i2c, wm8731);
 756
 757         ret = snd_soc_register_codec(&i2c->dev,
 758                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 759         if (ret != 0) {
 760                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 761                 return ret;
 762         }
 763
 764         return 0;
 765 }
 766
 767 static int wm8731_i2c_remove(struct i2c_client *client)
 768 {
 769         snd_soc_unregister_codec(&client->dev);
 770         return 0;
 771 }
 772
 773 static const struct i2c_device_id wm8731_i2c_id[] = {
 774         { "wm8731", 0 },
 775         { }
 776 };
 777 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 778
 779 static struct i2c_driver wm8731_i2c_driver = {
 780         .driver = {
 781                 .name = "wm8731",
 782                 .owner = THIS_MODULE,
 783                 .of_match_table = wm8731_of_match,
 784         },
 785         .probe =    wm8731_i2c_probe,
 786         .remove =   wm8731_i2c_remove,
 787         .id_table = wm8731_i2c_id,
 788 };
 789 #endif
 790
 791 static int __init wm8731_modinit(void)
 792 {
 793         int ret = 0;
 794 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 795         ret = i2c_add_driver(&wm8731_i2c_driver);
 796         if (ret != 0) {
 797                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 798                        ret);
 799         }
 800 #endif
 801 #if defined(CONFIG_SPI_MASTER)
 802         ret = spi_register_driver(&wm8731_spi_driver);
 803         if (ret != 0) {
 804                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 805                        ret);
 806         }
 807 #endif
 808         return ret;
 809 }
 810 module_init(wm8731_modinit);
 811
 812 static void __exit wm8731_exit(void)
 813 {
 814 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 815         i2c_del_driver(&wm8731_i2c_driver);
 816 #endif
 817 #if defined(CONFIG_SPI_MASTER)
 818         spi_unregister_driver(&wm8731_spi_driver);
 819 #endif
 820 }
 821 module_exit(wm8731_exit);
 822
 823 MODULE_DESCRIPTION("ASoC WM8731 driver");
 824 MODULE_AUTHOR("Richard Purdie");
 825 MODULE_LICENSE("GPL");