sound/soc/codecs/wm8731.c

   1 /*
   2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  *
   6  * Author: Richard Purdie <richard@openedhand.com>
   7  *
   8  * Based on wm8753.c by Liam Girdwood
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/moduleparam.h>
  17 #include <linux/init.h>
  18 #include <linux/delay.h>
  19 #include <linux/pm.h>
  20 #include <linux/i2c.h>
  21 #include <linux/slab.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/regulator/consumer.h>
  24 #include <linux/spi/spi.h>
  25 #include <linux/of_device.h>
  26 #include <sound/core.h>
  27 #include <sound/pcm.h>
  28 #include <sound/pcm_params.h>
  29 #include <sound/soc.h>
  30 #include <sound/initval.h>
  31 #include <sound/tlv.h>
  32
  33 #include "wm8731.h"
  34
  35 #define WM8731_NUM_SUPPLIES 4
  36 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  37         "AVDD",
  38         "HPVDD",
  39         "DCVDD",
  40         "DBVDD",
  41 };
  42
  43 /* codec private data */
  44 struct wm8731_priv {
  45         enum snd_soc_control_type control_type;
  46         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  47         unsigned int sysclk;
  48         int sysclk_type;
  49         int playback_fs;
  50         bool deemph;
  51 };
  52
  53
  54 /*
  55  * wm8731 register cache
  56  * We can't read the WM8731 register space when we are
  57  * using 2 wire for device control, so we cache them instead.
  58  * There is no point in caching the reset register
  59  */
  60 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
  61         0x0097, 0x0097, 0x0079, 0x0079,
  62         0x000a, 0x0008, 0x009f, 0x000a,
  63         0x0000, 0x0000
  64 };
  65
  66 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  67
  68 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  69
  70 static const struct soc_enum wm8731_insel_enum =
  71         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
  72
  73 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  74
  75 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  76 {
  77         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  78         int val, i, best;
  79
  80         /* If we're using deemphasis select the nearest available sample
  81          * rate.
  82          */
  83         if (wm8731->deemph) {
  84                 best = 1;
  85                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
  86                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
  87                             abs(wm8731_deemph[best] - wm8731->playback_fs))
  88                                 best = i;
  89                 }
  90
  91                 val = best << 1;
  92         } else {
  93                 best = 0;
  94                 val = 0;
  95         }
  96
  97         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
  98                 best, wm8731_deemph[best]);
  99
 100         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 101 }
 102
 103 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 104                              struct snd_ctl_elem_value *ucontrol)
 105 {
 106         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 107         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 108
 109         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 110
 111         return 0;
 112 }
 113
 114 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 115                              struct snd_ctl_elem_value *ucontrol)
 116 {
 117         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 118         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 119         int deemph = ucontrol->value.enumerated.item[0];
 120         int ret = 0;
 121
 122         if (deemph > 1)
 123                 return -EINVAL;
 124
 125         mutex_lock(&codec->mutex);
 126         if (wm8731->deemph != deemph) {
 127                 wm8731->deemph = deemph;
 128
 129                 wm8731_set_deemph(codec);
 130
 131                 ret = 1;
 132         }
 133         mutex_unlock(&codec->mutex);
 134
 135         return ret;
 136 }
 137
 138 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 139 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 140 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 141 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 142
 143 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 144
 145 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 146                  0, 127, 0, out_tlv),
 147 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 148         7, 1, 0),
 149
 150 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 151                  in_tlv),
 152 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 153
 154 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 155 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 156
 157 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 158                sidetone_tlv),
 159
 160 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 161 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 162
 163 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 164                     wm8731_get_deemph, wm8731_put_deemph),
 165 };
 166
 167 /* Output Mixer */
 168 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 169 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 170 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 171 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 172 };
 173
 174 /* Input mux */
 175 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 176 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 177
 178 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 179 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 180 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 181 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 182         &wm8731_output_mixer_controls[0],
 183         ARRAY_SIZE(wm8731_output_mixer_controls)),
 184 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 185 SND_SOC_DAPM_OUTPUT("LOUT"),
 186 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 187 SND_SOC_DAPM_OUTPUT("ROUT"),
 188 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 189 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 190 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 191 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 192 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 193 SND_SOC_DAPM_INPUT("MICIN"),
 194 SND_SOC_DAPM_INPUT("RLINEIN"),
 195 SND_SOC_DAPM_INPUT("LLINEIN"),
 196 };
 197
 198 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 199                             struct snd_soc_dapm_widget *sink)
 200 {
 201         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 202
 203         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 204 }
 205
 206 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 207         {"DAC", NULL, "OSC", wm8731_check_osc},
 208         {"ADC", NULL, "OSC", wm8731_check_osc},
 209         {"DAC", NULL, "ACTIVE"},
 210         {"ADC", NULL, "ACTIVE"},
 211
 212         /* output mixer */
 213         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 214         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 215         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 216
 217         /* outputs */
 218         {"RHPOUT", NULL, "Output Mixer"},
 219         {"ROUT", NULL, "Output Mixer"},
 220         {"LHPOUT", NULL, "Output Mixer"},
 221         {"LOUT", NULL, "Output Mixer"},
 222
 223         /* input mux */
 224         {"Input Mux", "Line In", "Line Input"},
 225         {"Input Mux", "Mic", "Mic Bias"},
 226         {"ADC", NULL, "Input Mux"},
 227
 228         /* inputs */
 229         {"Line Input", NULL, "LLINEIN"},
 230         {"Line Input", NULL, "RLINEIN"},
 231         {"Mic Bias", NULL, "MICIN"},
 232 };
 233
 234 struct _coeff_div {
 235         u32 mclk;
 236         u32 rate;
 237         u16 fs;
 238         u8 sr:4;
 239         u8 bosr:1;
 240         u8 usb:1;
 241 };
 242
 243 /* codec mclk clock divider coefficients */
 244 static const struct _coeff_div coeff_div[] = {
 245         /* 48k */
 246         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 247         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 248         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 249
 250         /* 32k */
 251         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 252         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 253         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 254
 255         /* 8k */
 256         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 257         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 258         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 259         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 260         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 261
 262         /* 96k */
 263         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 264         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 265         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 266
 267         /* 44.1k */
 268         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 269         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 270         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 271
 272         /* 88.2k */
 273         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 274         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 275         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 276 };
 277
 278 static inline int get_coeff(int mclk, int rate)
 279 {
 280         int i;
 281
 282         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 283                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 284                         return i;
 285         }
 286         return 0;
 287 }
 288
 289 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 290                             struct snd_pcm_hw_params *params,
 291                             struct snd_soc_dai *dai)
 292 {
 293         struct snd_soc_codec *codec = dai->codec;
 294         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 295         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 296         int i = get_coeff(wm8731->sysclk, params_rate(params));
 297         u16 srate = (coeff_div[i].sr << 2) |
 298                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 299
 300         wm8731->playback_fs = params_rate(params);
 301
 302         snd_soc_write(codec, WM8731_SRATE, srate);
 303
 304         /* bit size */
 305         switch (params_format(params)) {
 306         case SNDRV_PCM_FORMAT_S16_LE:
 307                 break;
 308         case SNDRV_PCM_FORMAT_S20_3LE:
 309                 iface |= 0x0004;
 310                 break;
 311         case SNDRV_PCM_FORMAT_S24_LE:
 312                 iface |= 0x0008;
 313                 break;
 314         }
 315
 316         wm8731_set_deemph(codec);
 317
 318         snd_soc_write(codec, WM8731_IFACE, iface);
 319         return 0;
 320 }
 321
 322 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 323 {
 324         struct snd_soc_codec *codec = dai->codec;
 325         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 326
 327         if (mute)
 328                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 329         else
 330                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 331         return 0;
 332 }
 333
 334 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 335                 int clk_id, unsigned int freq, int dir)
 336 {
 337         struct snd_soc_codec *codec = codec_dai->codec;
 338         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 339
 340         switch (clk_id) {
 341         case WM8731_SYSCLK_XTAL:
 342         case WM8731_SYSCLK_MCLK:
 343                 wm8731->sysclk_type = clk_id;
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348
 349         switch (freq) {
 350         case 11289600:
 351         case 12000000:
 352         case 12288000:
 353         case 16934400:
 354         case 18432000:
 355                 wm8731->sysclk = freq;
 356                 break;
 357         default:
 358                 return -EINVAL;
 359         }
 360
 361         snd_soc_dapm_sync(&codec->dapm);
 362
 363         return 0;
 364 }
 365
 366
 367 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 368                 unsigned int fmt)
 369 {
 370         struct snd_soc_codec *codec = codec_dai->codec;
 371         u16 iface = 0;
 372
 373         /* set master/slave audio interface */
 374         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 375         case SND_SOC_DAIFMT_CBM_CFM:
 376                 iface |= 0x0040;
 377                 break;
 378         case SND_SOC_DAIFMT_CBS_CFS:
 379                 break;
 380         default:
 381                 return -EINVAL;
 382         }
 383
 384         /* interface format */
 385         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 386         case SND_SOC_DAIFMT_I2S:
 387                 iface |= 0x0002;
 388                 break;
 389         case SND_SOC_DAIFMT_RIGHT_J:
 390                 break;
 391         case SND_SOC_DAIFMT_LEFT_J:
 392                 iface |= 0x0001;
 393                 break;
 394         case SND_SOC_DAIFMT_DSP_A:
 395                 iface |= 0x0003;
 396                 break;
 397         case SND_SOC_DAIFMT_DSP_B:
 398                 iface |= 0x0013;
 399                 break;
 400         default:
 401                 return -EINVAL;
 402         }
 403
 404         /* clock inversion */
 405         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 406         case SND_SOC_DAIFMT_NB_NF:
 407                 break;
 408         case SND_SOC_DAIFMT_IB_IF:
 409                 iface |= 0x0090;
 410                 break;
 411         case SND_SOC_DAIFMT_IB_NF:
 412                 iface |= 0x0080;
 413                 break;
 414         case SND_SOC_DAIFMT_NB_IF:
 415                 iface |= 0x0010;
 416                 break;
 417         default:
 418                 return -EINVAL;
 419         }
 420
 421         /* set iface */
 422         snd_soc_write(codec, WM8731_IFACE, iface);
 423         return 0;
 424 }
 425
 426 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 427                                  enum snd_soc_bias_level level)
 428 {
 429         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 430         int i, ret;
 431         u8 data[2];
 432         u16 *cache = codec->reg_cache;
 433         u16 reg;
 434
 435         switch (level) {
 436         case SND_SOC_BIAS_ON:
 437                 break;
 438         case SND_SOC_BIAS_PREPARE:
 439                 break;
 440         case SND_SOC_BIAS_STANDBY:
 441                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 442                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 443                                                     wm8731->supplies);
 444                         if (ret != 0)
 445                                 return ret;
 446
 447                         /* Sync reg_cache with the hardware */
 448                         for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
 449                                 if (cache[i] == wm8731_reg[i])
 450                                         continue;
 451
 452                                 data[0] = (i << 1) | ((cache[i] >> 8)
 453                                                       & 0x0001);
 454                                 data[1] = cache[i] & 0x00ff;
 455                                 codec->hw_write(codec->control_data, data, 2);
 456                         }
 457                 }
 458
 459                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 460                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 461                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 462                 break;
 463         case SND_SOC_BIAS_OFF:
 464                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 465                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 466                                        wm8731->supplies);
 467                 break;
 468         }
 469         codec->dapm.bias_level = level;
 470         return 0;
 471 }
 472
 473 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 474
 475 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 476         SNDRV_PCM_FMTBIT_S24_LE)
 477
 478 static struct snd_soc_dai_ops wm8731_dai_ops = {
 479         .hw_params      = wm8731_hw_params,
 480         .digital_mute   = wm8731_mute,
 481         .set_sysclk     = wm8731_set_dai_sysclk,
 482         .set_fmt        = wm8731_set_dai_fmt,
 483 };
 484
 485 static struct snd_soc_dai_driver wm8731_dai = {
 486         .name = "wm8731-hifi",
 487         .playback = {
 488                 .stream_name = "Playback",
 489                 .channels_min = 1,
 490                 .channels_max = 2,
 491                 .rates = WM8731_RATES,
 492                 .formats = WM8731_FORMATS,},
 493         .capture = {
 494                 .stream_name = "Capture",
 495                 .channels_min = 1,
 496                 .channels_max = 2,
 497                 .rates = WM8731_RATES,
 498                 .formats = WM8731_FORMATS,},
 499         .ops = &wm8731_dai_ops,
 500         .symmetric_rates = 1,
 501 };
 502
 503 #ifdef CONFIG_PM
 504 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state)
 505 {
 506         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 507
 508         return 0;
 509 }
 510
 511 static int wm8731_resume(struct snd_soc_codec *codec)
 512 {
 513         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 514
 515         return 0;
 516 }
 517 #else
 518 #define wm8731_suspend NULL
 519 #define wm8731_resume NULL
 520 #endif
 521
 522 static int wm8731_probe(struct snd_soc_codec *codec)
 523 {
 524         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 525         int ret = 0, i;
 526
 527         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type);
 528         if (ret < 0) {
 529                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 530                 return ret;
 531         }
 532
 533         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 534                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 535
 536         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 537                                  wm8731->supplies);
 538         if (ret != 0) {
 539                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 540                 return ret;
 541         }
 542
 543         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 544                                     wm8731->supplies);
 545         if (ret != 0) {
 546                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 547                 goto err_regulator_get;
 548         }
 549
 550         ret = wm8731_reset(codec);
 551         if (ret < 0) {
 552                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 553                 goto err_regulator_enable;
 554         }
 555
 556         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 557
 558         /* Latch the update bits */
 559         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 560         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 561         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 562         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 563
 564         /* Disable bypass path by default */
 565         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 566
 567         snd_soc_add_controls(codec, wm8731_snd_controls,
 568                              ARRAY_SIZE(wm8731_snd_controls));
 569
 570         /* Regulators will have been enabled by bias management */
 571         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 572
 573         return 0;
 574
 575 err_regulator_enable:
 576         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 577 err_regulator_get:
 578         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 579
 580         return ret;
 581 }
 582
 583 /* power down chip */
 584 static int wm8731_remove(struct snd_soc_codec *codec)
 585 {
 586         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 587
 588         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 589
 590         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 591         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 592
 593         return 0;
 594 }
 595
 596 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 597         .probe =        wm8731_probe,
 598         .remove =       wm8731_remove,
 599         .suspend =      wm8731_suspend,
 600         .resume =       wm8731_resume,
 601         .set_bias_level = wm8731_set_bias_level,
 602         .reg_cache_size = ARRAY_SIZE(wm8731_reg),
 603         .reg_word_size = sizeof(u16),
 604         .reg_cache_default = wm8731_reg,
 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 };
 610
 611 static const struct of_device_id wm8731_of_match[] = {
 612         { .compatible = "wlf,wm8731", },
 613         { }
 614 };
 615
 616 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 617
 618 #if defined(CONFIG_SPI_MASTER)
 619 static int __devinit wm8731_spi_probe(struct spi_device *spi)
 620 {
 621         struct wm8731_priv *wm8731;
 622         int ret;
 623
 624         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 625         if (wm8731 == NULL)
 626                 return -ENOMEM;
 627
 628         wm8731->control_type = SND_SOC_SPI;
 629         spi_set_drvdata(spi, wm8731);
 630
 631         ret = snd_soc_register_codec(&spi->dev,
 632                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 633         if (ret < 0)
 634                 kfree(wm8731);
 635         return ret;
 636 }
 637
 638 static int __devexit wm8731_spi_remove(struct spi_device *spi)
 639 {
 640         snd_soc_unregister_codec(&spi->dev);
 641         kfree(spi_get_drvdata(spi));
 642         return 0;
 643 }
 644
 645 static struct spi_driver wm8731_spi_driver = {
 646         .driver = {
 647                 .name   = "wm8731",
 648                 .owner  = THIS_MODULE,
 649                 .of_match_table = wm8731_of_match,
 650         },
 651         .probe          = wm8731_spi_probe,
 652         .remove         = __devexit_p(wm8731_spi_remove),
 653 };
 654 #endif /* CONFIG_SPI_MASTER */
 655
 656 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 657 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
 658                                       const struct i2c_device_id *id)
 659 {
 660         struct wm8731_priv *wm8731;
 661         int ret;
 662
 663         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 664         if (wm8731 == NULL)
 665                 return -ENOMEM;
 666
 667         i2c_set_clientdata(i2c, wm8731);
 668         wm8731->control_type = SND_SOC_I2C;
 669
 670         ret =  snd_soc_register_codec(&i2c->dev,
 671                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 672         if (ret < 0)
 673                 kfree(wm8731);
 674         return ret;
 675 }
 676
 677 static __devexit int wm8731_i2c_remove(struct i2c_client *client)
 678 {
 679         snd_soc_unregister_codec(&client->dev);
 680         kfree(i2c_get_clientdata(client));
 681         return 0;
 682 }
 683
 684 static const struct i2c_device_id wm8731_i2c_id[] = {
 685         { "wm8731", 0 },
 686         { }
 687 };
 688 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 689
 690 static struct i2c_driver wm8731_i2c_driver = {
 691         .driver = {
 692                 .name = "wm8731",
 693                 .owner = THIS_MODULE,
 694                 .of_match_table = wm8731_of_match,
 695         },
 696         .probe =    wm8731_i2c_probe,
 697         .remove =   __devexit_p(wm8731_i2c_remove),
 698         .id_table = wm8731_i2c_id,
 699 };
 700 #endif
 701
 702 static int __init wm8731_modinit(void)
 703 {
 704         int ret = 0;
 705 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 706         ret = i2c_add_driver(&wm8731_i2c_driver);
 707         if (ret != 0) {
 708                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 709                        ret);
 710         }
 711 #endif
 712 #if defined(CONFIG_SPI_MASTER)
 713         ret = spi_register_driver(&wm8731_spi_driver);
 714         if (ret != 0) {
 715                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 716                        ret);
 717         }
 718 #endif
 719         return ret;
 720 }
 721 module_init(wm8731_modinit);
 722
 723 static void __exit wm8731_exit(void)
 724 {
 725 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 726         i2c_del_driver(&wm8731_i2c_driver);
 727 #endif
 728 #if defined(CONFIG_SPI_MASTER)
 729         spi_unregister_driver(&wm8731_spi_driver);
 730 #endif
 731 }
 732 module_exit(wm8731_exit);
 733
 734 MODULE_DESCRIPTION("ASoC WM8731 driver");
 735 MODULE_AUTHOR("Richard Purdie");
 736 MODULE_LICENSE("GPL");