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