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 <sound/core.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/initval.h>
  30 #include <sound/tlv.h>
  31
  32 #include "wm8731.h"
  33
  34 #define WM8731_NUM_SUPPLIES 4
  35 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  36         "AVDD",
  37         "HPVDD",
  38         "DCVDD",
  39         "DBVDD",
  40 };
  41
  42 /* codec private data */
  43 struct wm8731_priv {
  44         enum snd_soc_control_type control_type;
  45         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  46         unsigned int sysclk;
  47         int sysclk_type;
  48         int playback_fs;
  49         bool deemph;
  50 };
  51
  52
  53 /*
  54  * wm8731 register cache
  55  * We can't read the WM8731 register space when we are
  56  * using 2 wire for device control, so we cache them instead.
  57  * There is no point in caching the reset register
  58  */
  59 static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
  60         0x0097, 0x0097, 0x0079, 0x0079,
  61         0x000a, 0x0008, 0x009f, 0x000a,
  62         0x0000, 0x0000
  63 };
  64
  65 #define wm8731_reset(c) snd_soc_write(c, WM8731_RESET, 0)
  66
  67 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  68
  69 static const struct soc_enum wm8731_insel_enum =
  70         SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select);
  71
  72 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  73
  74 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  75 {
  76         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  77         int val, i, best;
  78
  79         /* If we're using deemphasis select the nearest available sample
  80          * rate.
  81          */
  82         if (wm8731->deemph) {
  83                 best = 1;
  84                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
  85                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
  86                             abs(wm8731_deemph[best] - wm8731->playback_fs))
  87                                 best = i;
  88                 }
  89
  90                 val = best << 1;
  91         } else {
  92                 best = 0;
  93                 val = 0;
  94         }
  95
  96         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
  97                 best, wm8731_deemph[best]);
  98
  99         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 100 }
 101
 102 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 103                              struct snd_ctl_elem_value *ucontrol)
 104 {
 105         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 106         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 107
 108         ucontrol->value.enumerated.item[0] = wm8731->deemph;
 109
 110         return 0;
 111 }
 112
 113 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 114                              struct snd_ctl_elem_value *ucontrol)
 115 {
 116         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 117         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 118         int deemph = ucontrol->value.enumerated.item[0];
 119         int ret = 0;
 120
 121         if (deemph > 1)
 122                 return -EINVAL;
 123
 124         mutex_lock(&codec->mutex);
 125         if (wm8731->deemph != deemph) {
 126                 wm8731->deemph = deemph;
 127
 128                 wm8731_set_deemph(codec);
 129
 130                 ret = 1;
 131         }
 132         mutex_unlock(&codec->mutex);
 133
 134         return ret;
 135 }
 136
 137 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 138 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 139 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 140 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 141
 142 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 143
 144 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 145                  0, 127, 0, out_tlv),
 146 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 147         7, 1, 0),
 148
 149 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 150                  in_tlv),
 151 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 152
 153 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 154 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 155
 156 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 157                sidetone_tlv),
 158
 159 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 160 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 161
 162 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 163                     wm8731_get_deemph, wm8731_put_deemph),
 164 };
 165
 166 /* Output Mixer */
 167 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 168 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 169 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 170 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 171 };
 172
 173 /* Input mux */
 174 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 175 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 176
 177 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 178 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 179 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 180         &wm8731_output_mixer_controls[0],
 181         ARRAY_SIZE(wm8731_output_mixer_controls)),
 182 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 183 SND_SOC_DAPM_OUTPUT("LOUT"),
 184 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 185 SND_SOC_DAPM_OUTPUT("ROUT"),
 186 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 187 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 188 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 189 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 190 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 191 SND_SOC_DAPM_INPUT("MICIN"),
 192 SND_SOC_DAPM_INPUT("RLINEIN"),
 193 SND_SOC_DAPM_INPUT("LLINEIN"),
 194 };
 195
 196 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 197                             struct snd_soc_dapm_widget *sink)
 198 {
 199         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(source->codec);
 200
 201         return wm8731->sysclk_type == WM8731_SYSCLK_MCLK;
 202 }
 203
 204 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 205         {"DAC", NULL, "OSC", wm8731_check_osc},
 206         {"ADC", NULL, "OSC", wm8731_check_osc},
 207
 208         /* output mixer */
 209         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 210         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 211         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 212
 213         /* outputs */
 214         {"RHPOUT", NULL, "Output Mixer"},
 215         {"ROUT", NULL, "Output Mixer"},
 216         {"LHPOUT", NULL, "Output Mixer"},
 217         {"LOUT", NULL, "Output Mixer"},
 218
 219         /* input mux */
 220         {"Input Mux", "Line In", "Line Input"},
 221         {"Input Mux", "Mic", "Mic Bias"},
 222         {"ADC", NULL, "Input Mux"},
 223
 224         /* inputs */
 225         {"Line Input", NULL, "LLINEIN"},
 226         {"Line Input", NULL, "RLINEIN"},
 227         {"Mic Bias", NULL, "MICIN"},
 228 };
 229
 230 struct _coeff_div {
 231         u32 mclk;
 232         u32 rate;
 233         u16 fs;
 234         u8 sr:4;
 235         u8 bosr:1;
 236         u8 usb:1;
 237 };
 238
 239 /* codec mclk clock divider coefficients */
 240 static const struct _coeff_div coeff_div[] = {
 241         /* 48k */
 242         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 243         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 244         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 245
 246         /* 32k */
 247         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 248         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 249         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 250
 251         /* 8k */
 252         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 253         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 254         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 255         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 256         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 257
 258         /* 96k */
 259         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 260         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 261         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 262
 263         /* 44.1k */
 264         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 265         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 266         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 267
 268         /* 88.2k */
 269         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 270         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 271         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 272 };
 273
 274 static inline int get_coeff(int mclk, int rate)
 275 {
 276         int i;
 277
 278         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 279                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 280                         return i;
 281         }
 282         return 0;
 283 }
 284
 285 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 286                             struct snd_pcm_hw_params *params,
 287                             struct snd_soc_dai *dai)
 288 {
 289         struct snd_soc_codec *codec = dai->codec;
 290         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 291         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 292         int i = get_coeff(wm8731->sysclk, params_rate(params));
 293         u16 srate = (coeff_div[i].sr << 2) |
 294                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 295
 296         wm8731->playback_fs = params_rate(params);
 297
 298         snd_soc_write(codec, WM8731_SRATE, srate);
 299
 300         /* bit size */
 301         switch (params_format(params)) {
 302         case SNDRV_PCM_FORMAT_S16_LE:
 303                 break;
 304         case SNDRV_PCM_FORMAT_S20_3LE:
 305                 iface |= 0x0004;
 306                 break;
 307         case SNDRV_PCM_FORMAT_S24_LE:
 308                 iface |= 0x0008;
 309                 break;
 310         }
 311
 312         wm8731_set_deemph(codec);
 313
 314         snd_soc_write(codec, WM8731_IFACE, iface);
 315         return 0;
 316 }
 317
 318 static int wm8731_pcm_prepare(struct snd_pcm_substream *substream,
 319                               struct snd_soc_dai *dai)
 320 {
 321         struct snd_soc_codec *codec = dai->codec;
 322
 323         /* set active */
 324         snd_soc_write(codec, WM8731_ACTIVE, 0x0001);
 325
 326         return 0;
 327 }
 328
 329 static void wm8731_shutdown(struct snd_pcm_substream *substream,
 330                             struct snd_soc_dai *dai)
 331 {
 332         struct snd_soc_codec *codec = dai->codec;
 333
 334         /* deactivate */
 335         if (!codec->active) {
 336                 udelay(50);
 337                 snd_soc_write(codec, WM8731_ACTIVE, 0x0);
 338         }
 339 }
 340
 341 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 342 {
 343         struct snd_soc_codec *codec = dai->codec;
 344         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 345
 346         if (mute)
 347                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 348         else
 349                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 350         return 0;
 351 }
 352
 353 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 354                 int clk_id, unsigned int freq, int dir)
 355 {
 356         struct snd_soc_codec *codec = codec_dai->codec;
 357         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 358
 359         switch (clk_id) {
 360         case WM8731_SYSCLK_XTAL:
 361         case WM8731_SYSCLK_MCLK:
 362                 wm8731->sysclk_type = clk_id;
 363                 break;
 364         default:
 365                 return -EINVAL;
 366         }
 367
 368         switch (freq) {
 369         case 11289600:
 370         case 12000000:
 371         case 12288000:
 372         case 16934400:
 373         case 18432000:
 374                 wm8731->sysclk = freq;
 375                 break;
 376         default:
 377                 return -EINVAL;
 378         }
 379
 380         snd_soc_dapm_sync(&codec->dapm);
 381
 382         return 0;
 383 }
 384
 385
 386 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 387                 unsigned int fmt)
 388 {
 389         struct snd_soc_codec *codec = codec_dai->codec;
 390         u16 iface = 0;
 391
 392         /* set master/slave audio interface */
 393         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 394         case SND_SOC_DAIFMT_CBM_CFM:
 395                 iface |= 0x0040;
 396                 break;
 397         case SND_SOC_DAIFMT_CBS_CFS:
 398                 break;
 399         default:
 400                 return -EINVAL;
 401         }
 402
 403         /* interface format */
 404         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 405         case SND_SOC_DAIFMT_I2S:
 406                 iface |= 0x0002;
 407                 break;
 408         case SND_SOC_DAIFMT_RIGHT_J:
 409                 break;
 410         case SND_SOC_DAIFMT_LEFT_J:
 411                 iface |= 0x0001;
 412                 break;
 413         case SND_SOC_DAIFMT_DSP_A:
 414                 iface |= 0x0003;
 415                 break;
 416         case SND_SOC_DAIFMT_DSP_B:
 417                 iface |= 0x0013;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         /* clock inversion */
 424         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 425         case SND_SOC_DAIFMT_NB_NF:
 426                 break;
 427         case SND_SOC_DAIFMT_IB_IF:
 428                 iface |= 0x0090;
 429                 break;
 430         case SND_SOC_DAIFMT_IB_NF:
 431                 iface |= 0x0080;
 432                 break;
 433         case SND_SOC_DAIFMT_NB_IF:
 434                 iface |= 0x0010;
 435                 break;
 436         default:
 437                 return -EINVAL;
 438         }
 439
 440         /* set iface */
 441         snd_soc_write(codec, WM8731_IFACE, iface);
 442         return 0;
 443 }
 444
 445 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 446                                  enum snd_soc_bias_level level)
 447 {
 448         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 449         int i, ret;
 450         u8 data[2];
 451         u16 *cache = codec->reg_cache;
 452         u16 reg;
 453
 454         switch (level) {
 455         case SND_SOC_BIAS_ON:
 456                 break;
 457         case SND_SOC_BIAS_PREPARE:
 458                 break;
 459         case SND_SOC_BIAS_STANDBY:
 460                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 461                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 462                                                     wm8731->supplies);
 463                         if (ret != 0)
 464                                 return ret;
 465
 466                         /* Sync reg_cache with the hardware */
 467                         for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
 468                                 if (cache[i] == wm8731_reg[i])
 469                                         continue;
 470
 471                                 data[0] = (i << 1) | ((cache[i] >> 8)
 472                                                       & 0x0001);
 473                                 data[1] = cache[i] & 0x00ff;
 474                                 codec->hw_write(codec->control_data, data, 2);
 475                         }
 476                 }
 477
 478                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 479                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 480                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 481                 break;
 482         case SND_SOC_BIAS_OFF:
 483                 snd_soc_write(codec, WM8731_ACTIVE, 0x0);
 484                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 485                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 486                                        wm8731->supplies);
 487                 break;
 488         }
 489         codec->dapm.bias_level = level;
 490         return 0;
 491 }
 492
 493 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 494
 495 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 496         SNDRV_PCM_FMTBIT_S24_LE)
 497
 498 static struct snd_soc_dai_ops wm8731_dai_ops = {
 499         .prepare        = wm8731_pcm_prepare,
 500         .hw_params      = wm8731_hw_params,
 501         .shutdown       = wm8731_shutdown,
 502         .digital_mute   = wm8731_mute,
 503         .set_sysclk     = wm8731_set_dai_sysclk,
 504         .set_fmt        = wm8731_set_dai_fmt,
 505 };
 506
 507 static struct snd_soc_dai_driver wm8731_dai = {
 508         .name = "wm8731-hifi",
 509         .playback = {
 510                 .stream_name = "Playback",
 511                 .channels_min = 1,
 512                 .channels_max = 2,
 513                 .rates = WM8731_RATES,
 514                 .formats = WM8731_FORMATS,},
 515         .capture = {
 516                 .stream_name = "Capture",
 517                 .channels_min = 1,
 518                 .channels_max = 2,
 519                 .rates = WM8731_RATES,
 520                 .formats = WM8731_FORMATS,},
 521         .ops = &wm8731_dai_ops,
 522         .symmetric_rates = 1,
 523 };
 524
 525 #ifdef CONFIG_PM
 526 static int wm8731_suspend(struct snd_soc_codec *codec, pm_message_t state)
 527 {
 528         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 529
 530         return 0;
 531 }
 532
 533 static int wm8731_resume(struct snd_soc_codec *codec)
 534 {
 535         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 536
 537         return 0;
 538 }
 539 #else
 540 #define wm8731_suspend NULL
 541 #define wm8731_resume NULL
 542 #endif
 543
 544 static int wm8731_probe(struct snd_soc_codec *codec)
 545 {
 546         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 547         int ret = 0, i;
 548
 549         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8731->control_type);
 550         if (ret < 0) {
 551                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 552                 return ret;
 553         }
 554
 555         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 556                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 557
 558         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8731->supplies),
 559                                  wm8731->supplies);
 560         if (ret != 0) {
 561                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 562                 return ret;
 563         }
 564
 565         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 566                                     wm8731->supplies);
 567         if (ret != 0) {
 568                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 569                 goto err_regulator_get;
 570         }
 571
 572         ret = wm8731_reset(codec);
 573         if (ret < 0) {
 574                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 575                 goto err_regulator_enable;
 576         }
 577
 578         wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 579
 580         /* Latch the update bits */
 581         snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
 582         snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
 583         snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
 584         snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
 585
 586         /* Disable bypass path by default */
 587         snd_soc_update_bits(codec, WM8731_APANA, 0x8, 0);
 588
 589         snd_soc_add_controls(codec, wm8731_snd_controls,
 590                              ARRAY_SIZE(wm8731_snd_controls));
 591
 592         /* Regulators will have been enabled by bias management */
 593         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 594
 595         return 0;
 596
 597 err_regulator_enable:
 598         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 599 err_regulator_get:
 600         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 601
 602         return ret;
 603 }
 604
 605 /* power down chip */
 606 static int wm8731_remove(struct snd_soc_codec *codec)
 607 {
 608         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 609
 610         wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
 611
 612         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 613         regulator_bulk_free(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 614
 615         return 0;
 616 }
 617
 618 static struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 619         .probe =        wm8731_probe,
 620         .remove =       wm8731_remove,
 621         .suspend =      wm8731_suspend,
 622         .resume =       wm8731_resume,
 623         .set_bias_level = wm8731_set_bias_level,
 624         .reg_cache_size = ARRAY_SIZE(wm8731_reg),
 625         .reg_word_size = sizeof(u16),
 626         .reg_cache_default = wm8731_reg,
 627         .dapm_widgets = wm8731_dapm_widgets,
 628         .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
 629         .dapm_routes = wm8731_intercon,
 630         .num_dapm_routes = ARRAY_SIZE(wm8731_intercon),
 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 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 640         if (wm8731 == NULL)
 641                 return -ENOMEM;
 642
 643         wm8731->control_type = SND_SOC_SPI;
 644         spi_set_drvdata(spi, wm8731);
 645
 646         ret = snd_soc_register_codec(&spi->dev,
 647                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 648         if (ret < 0)
 649                 kfree(wm8731);
 650         return ret;
 651 }
 652
 653 static int __devexit wm8731_spi_remove(struct spi_device *spi)
 654 {
 655         snd_soc_unregister_codec(&spi->dev);
 656         kfree(spi_get_drvdata(spi));
 657         return 0;
 658 }
 659
 660 static struct spi_driver wm8731_spi_driver = {
 661         .driver = {
 662                 .name   = "wm8731",
 663                 .owner  = THIS_MODULE,
 664         },
 665         .probe          = wm8731_spi_probe,
 666         .remove         = __devexit_p(wm8731_spi_remove),
 667 };
 668 #endif /* CONFIG_SPI_MASTER */
 669
 670 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 671 static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
 672                                       const struct i2c_device_id *id)
 673 {
 674         struct wm8731_priv *wm8731;
 675         int ret;
 676
 677         wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
 678         if (wm8731 == NULL)
 679                 return -ENOMEM;
 680
 681         i2c_set_clientdata(i2c, wm8731);
 682         wm8731->control_type = SND_SOC_I2C;
 683
 684         ret =  snd_soc_register_codec(&i2c->dev,
 685                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 686         if (ret < 0)
 687                 kfree(wm8731);
 688         return ret;
 689 }
 690
 691 static __devexit int wm8731_i2c_remove(struct i2c_client *client)
 692 {
 693         snd_soc_unregister_codec(&client->dev);
 694         kfree(i2c_get_clientdata(client));
 695         return 0;
 696 }
 697
 698 static const struct i2c_device_id wm8731_i2c_id[] = {
 699         { "wm8731", 0 },
 700         { }
 701 };
 702 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 703
 704 static struct i2c_driver wm8731_i2c_driver = {
 705         .driver = {
 706                 .name = "wm8731",
 707                 .owner = THIS_MODULE,
 708         },
 709         .probe =    wm8731_i2c_probe,
 710         .remove =   __devexit_p(wm8731_i2c_remove),
 711         .id_table = wm8731_i2c_id,
 712 };
 713 #endif
 714
 715 static int __init wm8731_modinit(void)
 716 {
 717         int ret = 0;
 718 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 719         ret = i2c_add_driver(&wm8731_i2c_driver);
 720         if (ret != 0) {
 721                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 722                        ret);
 723         }
 724 #endif
 725 #if defined(CONFIG_SPI_MASTER)
 726         ret = spi_register_driver(&wm8731_spi_driver);
 727         if (ret != 0) {
 728                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 729                        ret);
 730         }
 731 #endif
 732         return ret;
 733 }
 734 module_init(wm8731_modinit);
 735
 736 static void __exit wm8731_exit(void)
 737 {
 738 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 739         i2c_del_driver(&wm8731_i2c_driver);
 740 #endif
 741 #if defined(CONFIG_SPI_MASTER)
 742         spi_unregister_driver(&wm8731_spi_driver);
 743 #endif
 744 }
 745 module_exit(wm8731_exit);
 746
 747 MODULE_DESCRIPTION("ASoC WM8731 driver");
 748 MODULE_AUTHOR("Richard Purdie");
 749 MODULE_LICENSE("GPL");