sound/soc/codecs/wm8770.c

   1 /*
   2  * wm8770.c  --  WM8770 ALSA SoC Audio driver
   3  *
   4  * Copyright 2010 Wolfson Microelectronics plc
   5  *
   6  * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/moduleparam.h>
  15 #include <linux/init.h>
  16 #include <linux/delay.h>
  17 #include <linux/of_device.h>
  18 #include <linux/pm.h>
  19 #include <linux/spi/spi.h>
  20 #include <linux/regmap.h>
  21 #include <linux/regulator/consumer.h>
  22 #include <linux/slab.h>
  23 #include <sound/core.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/initval.h>
  28 #include <sound/tlv.h>
  29
  30 #include "wm8770.h"
  31
  32 #define WM8770_NUM_SUPPLIES 3
  33 static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
  34         "AVDD1",
  35         "AVDD2",
  36         "DVDD"
  37 };
  38
  39 static const struct reg_default wm8770_reg_defaults[] = {
  40         {  0, 0x7f },
  41         {  1, 0x7f },
  42         {  2, 0x7f },
  43         {  3, 0x7f },
  44         {  4, 0x7f },
  45         {  5, 0x7f },
  46         {  6, 0x7f },
  47         {  7, 0x7f },
  48         {  8, 0x7f },
  49         {  9, 0xff },
  50         { 10, 0xff },
  51         { 11, 0xff },
  52         { 12, 0xff },
  53         { 13, 0xff },
  54         { 14, 0xff },
  55         { 15, 0xff },
  56         { 16, 0xff },
  57         { 17, 0xff },
  58         { 18, 0    },
  59         { 19, 0x90 },
  60         { 20, 0    },
  61         { 21, 0    },
  62         { 22, 0x22 },
  63         { 23, 0x22 },
  64         { 24, 0x3e },
  65         { 25, 0xc  },
  66         { 26, 0xc  },
  67         { 27, 0x100 },
  68         { 28, 0x189 },
  69         { 29, 0x189 },
  70         { 30, 0x8770 },
  71 };
  72
  73 static bool wm8770_volatile_reg(struct device *dev, unsigned int reg)
  74 {
  75         switch (reg) {
  76         case WM8770_RESET:
  77                 return true;
  78         default:
  79                 return false;
  80         }
  81 }
  82
  83 struct wm8770_priv {
  84         struct regmap *regmap;
  85         struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
  86         struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
  87         struct snd_soc_codec *codec;
  88         int sysclk;
  89 };
  90
  91 static int vout12supply_event(struct snd_soc_dapm_widget *w,
  92         struct snd_kcontrol *kcontrol, int event);
  93 static int vout34supply_event(struct snd_soc_dapm_widget *w,
  94         struct snd_kcontrol *kcontrol, int event);
  95
  96 /*
  97  * We can't use the same notifier block for more than one supply and
  98  * there's no way I can see to get from a callback to the caller
  99  * except container_of().
 100  */
 101 #define WM8770_REGULATOR_EVENT(n) \
 102 static int wm8770_regulator_event_##n(struct notifier_block *nb, \
 103                                       unsigned long event, void *data)    \
 104 { \
 105         struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
 106                                      disable_nb[n]); \
 107         if (event & REGULATOR_EVENT_DISABLE) { \
 108                 regcache_mark_dirty(wm8770->regmap);    \
 109         } \
 110         return 0; \
 111 }
 112
 113 WM8770_REGULATOR_EVENT(0)
 114 WM8770_REGULATOR_EVENT(1)
 115 WM8770_REGULATOR_EVENT(2)
 116
 117 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
 118 static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
 119 static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
 120
 121 static const char *dac_phase_text[][2] = {
 122         { "DAC1 Normal", "DAC1 Inverted" },
 123         { "DAC2 Normal", "DAC2 Inverted" },
 124         { "DAC3 Normal", "DAC3 Inverted" },
 125         { "DAC4 Normal", "DAC4 Inverted" },
 126 };
 127
 128 static const struct soc_enum dac_phase[] = {
 129         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
 130         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
 131         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
 132         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
 133 };
 134
 135 static const struct snd_kcontrol_new wm8770_snd_controls[] = {
 136         /* global DAC playback controls */
 137         SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
 138                 dac_dig_tlv),
 139         SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
 140         SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
 141
 142         /* global VOUT playback controls */
 143         SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
 144                 dac_alg_tlv),
 145         SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
 146
 147         /* VOUT1/2/3/4 specific controls */
 148         SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
 149                 WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
 150         SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
 151                 WM8770_VOUT1RVOL, 7, 1, 0),
 152         SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
 153                 WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
 154         SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
 155                 WM8770_VOUT2RVOL, 7, 1, 0),
 156         SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
 157                 WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
 158         SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
 159                 WM8770_VOUT3RVOL, 7, 1, 0),
 160         SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
 161                 WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
 162         SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
 163                 WM8770_VOUT4RVOL, 7, 1, 0),
 164
 165         /* DAC1/2/3/4 specific controls */
 166         SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
 167                 WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
 168         SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
 169         SOC_ENUM("DAC1 Phase", dac_phase[0]),
 170         SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
 171                 WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
 172         SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
 173         SOC_ENUM("DAC2 Phase", dac_phase[1]),
 174         SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
 175                 WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
 176         SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
 177         SOC_ENUM("DAC3 Phase", dac_phase[2]),
 178         SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
 179                 WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
 180         SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
 181         SOC_ENUM("DAC4 Phase", dac_phase[3]),
 182
 183         /* ADC specific controls */
 184         SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 185                 0, 31, 0, adc_tlv),
 186         SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 187                 5, 1, 1),
 188
 189         /* other controls */
 190         SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
 191         SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
 192 };
 193
 194 static const char *ain_text[] = {
 195         "AIN1", "AIN2", "AIN3", "AIN4",
 196         "AIN5", "AIN6", "AIN7", "AIN8"
 197 };
 198
 199 static SOC_ENUM_DOUBLE_DECL(ain_enum,
 200                             WM8770_ADCMUX, 0, 4, ain_text);
 201
 202 static const struct snd_kcontrol_new ain_mux =
 203         SOC_DAPM_ENUM("Capture Mux", ain_enum);
 204
 205 static const struct snd_kcontrol_new vout1_mix_controls[] = {
 206         SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
 207         SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
 208         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
 209 };
 210
 211 static const struct snd_kcontrol_new vout2_mix_controls[] = {
 212         SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
 213         SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
 214         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
 215 };
 216
 217 static const struct snd_kcontrol_new vout3_mix_controls[] = {
 218         SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
 219         SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
 220         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
 221 };
 222
 223 static const struct snd_kcontrol_new vout4_mix_controls[] = {
 224         SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
 225         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
 226 };
 227
 228 static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
 229         SND_SOC_DAPM_INPUT("AUX1"),
 230         SND_SOC_DAPM_INPUT("AUX2"),
 231         SND_SOC_DAPM_INPUT("AUX3"),
 232
 233         SND_SOC_DAPM_INPUT("AIN1"),
 234         SND_SOC_DAPM_INPUT("AIN2"),
 235         SND_SOC_DAPM_INPUT("AIN3"),
 236         SND_SOC_DAPM_INPUT("AIN4"),
 237         SND_SOC_DAPM_INPUT("AIN5"),
 238         SND_SOC_DAPM_INPUT("AIN6"),
 239         SND_SOC_DAPM_INPUT("AIN7"),
 240         SND_SOC_DAPM_INPUT("AIN8"),
 241
 242         SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
 243
 244         SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
 245
 246         SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
 247         SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
 248         SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
 249         SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
 250
 251         SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
 252                 vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 253         SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
 254                 vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 255
 256         SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
 257                 vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
 258         SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
 259                 vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
 260         SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
 261                 vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
 262         SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
 263                 vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
 264
 265         SND_SOC_DAPM_OUTPUT("VOUT1"),
 266         SND_SOC_DAPM_OUTPUT("VOUT2"),
 267         SND_SOC_DAPM_OUTPUT("VOUT3"),
 268         SND_SOC_DAPM_OUTPUT("VOUT4")
 269 };
 270
 271 static const struct snd_soc_dapm_route wm8770_intercon[] = {
 272         { "Capture Mux", "AIN1", "AIN1" },
 273         { "Capture Mux", "AIN2", "AIN2" },
 274         { "Capture Mux", "AIN3", "AIN3" },
 275         { "Capture Mux", "AIN4", "AIN4" },
 276         { "Capture Mux", "AIN5", "AIN5" },
 277         { "Capture Mux", "AIN6", "AIN6" },
 278         { "Capture Mux", "AIN7", "AIN7" },
 279         { "Capture Mux", "AIN8", "AIN8" },
 280
 281         { "ADC", NULL, "Capture Mux" },
 282
 283         { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
 284         { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
 285         { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
 286         { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
 287
 288         { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
 289         { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
 290         { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
 291         { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
 292
 293         { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
 294         { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
 295         { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
 296         { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
 297
 298         { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
 299         { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
 300         { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
 301
 302         { "VOUT1", NULL, "VOUT1 Mixer" },
 303         { "VOUT2", NULL, "VOUT2 Mixer" },
 304         { "VOUT3", NULL, "VOUT3 Mixer" },
 305         { "VOUT4", NULL, "VOUT4 Mixer" }
 306 };
 307
 308 static int vout12supply_event(struct snd_soc_dapm_widget *w,
 309         struct snd_kcontrol *kcontrol, int event)
 310 {
 311         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 312
 313         switch (event) {
 314         case SND_SOC_DAPM_PRE_PMU:
 315                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
 316                 break;
 317         case SND_SOC_DAPM_POST_PMD:
 318                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
 319                 break;
 320         }
 321
 322         return 0;
 323 }
 324
 325 static int vout34supply_event(struct snd_soc_dapm_widget *w,
 326         struct snd_kcontrol *kcontrol, int event)
 327 {
 328         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 329
 330         switch (event) {
 331         case SND_SOC_DAPM_PRE_PMU:
 332                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
 333                 break;
 334         case SND_SOC_DAPM_POST_PMD:
 335                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
 336                 break;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int wm8770_reset(struct snd_soc_codec *codec)
 343 {
 344         return snd_soc_write(codec, WM8770_RESET, 0);
 345 }
 346
 347 static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 348 {
 349         struct snd_soc_codec *codec;
 350         int iface, master;
 351
 352         codec = dai->codec;
 353
 354         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 355         case SND_SOC_DAIFMT_CBM_CFM:
 356                 master = 0x100;
 357                 break;
 358         case SND_SOC_DAIFMT_CBS_CFS:
 359                 master = 0;
 360                 break;
 361         default:
 362                 return -EINVAL;
 363         }
 364
 365         iface = 0;
 366         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 367         case SND_SOC_DAIFMT_I2S:
 368                 iface |= 0x2;
 369                 break;
 370         case SND_SOC_DAIFMT_RIGHT_J:
 371                 break;
 372         case SND_SOC_DAIFMT_LEFT_J:
 373                 iface |= 0x1;
 374                 break;
 375         default:
 376                 return -EINVAL;
 377         }
 378
 379         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 380         case SND_SOC_DAIFMT_NB_NF:
 381                 break;
 382         case SND_SOC_DAIFMT_IB_IF:
 383                 iface |= 0xc;
 384                 break;
 385         case SND_SOC_DAIFMT_IB_NF:
 386                 iface |= 0x8;
 387                 break;
 388         case SND_SOC_DAIFMT_NB_IF:
 389                 iface |= 0x4;
 390                 break;
 391         default:
 392                 return -EINVAL;
 393         }
 394
 395         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
 396         snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);
 397
 398         return 0;
 399 }
 400
 401 static const int mclk_ratios[] = {
 402         128,
 403         192,
 404         256,
 405         384,
 406         512,
 407         768
 408 };
 409
 410 static int wm8770_hw_params(struct snd_pcm_substream *substream,
 411                             struct snd_pcm_hw_params *params,
 412                             struct snd_soc_dai *dai)
 413 {
 414         struct snd_soc_codec *codec;
 415         struct wm8770_priv *wm8770;
 416         int i;
 417         int iface;
 418         int shift;
 419         int ratio;
 420
 421         codec = dai->codec;
 422         wm8770 = snd_soc_codec_get_drvdata(codec);
 423
 424         iface = 0;
 425         switch (params_width(params)) {
 426         case 16:
 427                 break;
 428         case 20:
 429                 iface |= 0x10;
 430                 break;
 431         case 24:
 432                 iface |= 0x20;
 433                 break;
 434         case 32:
 435                 iface |= 0x30;
 436                 break;
 437         }
 438
 439         switch (substream->stream) {
 440         case SNDRV_PCM_STREAM_PLAYBACK:
 441                 i = 0;
 442                 shift = 4;
 443                 break;
 444         case SNDRV_PCM_STREAM_CAPTURE:
 445                 i = 2;
 446                 shift = 0;
 447                 break;
 448         default:
 449                 return -EINVAL;
 450         }
 451
 452         /* Only need to set MCLK/LRCLK ratio if we're master */
 453         if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
 454                 for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
 455                         ratio = wm8770->sysclk / params_rate(params);
 456                         if (ratio == mclk_ratios[i])
 457                                 break;
 458                 }
 459
 460                 if (i == ARRAY_SIZE(mclk_ratios)) {
 461                         dev_err(codec->dev,
 462                                 "Unable to configure MCLK ratio %d/%d\n",
 463                                 wm8770->sysclk, params_rate(params));
 464                         return -EINVAL;
 465                 }
 466
 467                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 468
 469                 snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
 470                                     i << shift);
 471         }
 472
 473         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
 474
 475         return 0;
 476 }
 477
 478 static int wm8770_mute(struct snd_soc_dai *dai, int mute)
 479 {
 480         struct snd_soc_codec *codec;
 481
 482         codec = dai->codec;
 483         return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
 484                                    !!mute << 4);
 485 }
 486
 487 static int wm8770_set_sysclk(struct snd_soc_dai *dai,
 488                              int clk_id, unsigned int freq, int dir)
 489 {
 490         struct snd_soc_codec *codec;
 491         struct wm8770_priv *wm8770;
 492
 493         codec = dai->codec;
 494         wm8770 = snd_soc_codec_get_drvdata(codec);
 495         wm8770->sysclk = freq;
 496         return 0;
 497 }
 498
 499 static int wm8770_set_bias_level(struct snd_soc_codec *codec,
 500                                  enum snd_soc_bias_level level)
 501 {
 502         int ret;
 503         struct wm8770_priv *wm8770;
 504
 505         wm8770 = snd_soc_codec_get_drvdata(codec);
 506
 507         switch (level) {
 508         case SND_SOC_BIAS_ON:
 509                 break;
 510         case SND_SOC_BIAS_PREPARE:
 511                 break;
 512         case SND_SOC_BIAS_STANDBY:
 513                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 514                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 515                                                     wm8770->supplies);
 516                         if (ret) {
 517                                 dev_err(codec->dev,
 518                                         "Failed to enable supplies: %d\n",
 519                                         ret);
 520                                 return ret;
 521                         }
 522
 523                         regcache_sync(wm8770->regmap);
 524
 525                         /* global powerup */
 526                         snd_soc_write(codec, WM8770_PWDNCTRL, 0);
 527                 }
 528                 break;
 529         case SND_SOC_BIAS_OFF:
 530                 /* global powerdown */
 531                 snd_soc_write(codec, WM8770_PWDNCTRL, 1);
 532                 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
 533                                        wm8770->supplies);
 534                 break;
 535         }
 536
 537         return 0;
 538 }
 539
 540 #define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 541                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 542
 543 static const struct snd_soc_dai_ops wm8770_dai_ops = {
 544         .digital_mute = wm8770_mute,
 545         .hw_params = wm8770_hw_params,
 546         .set_fmt = wm8770_set_fmt,
 547         .set_sysclk = wm8770_set_sysclk,
 548 };
 549
 550 static struct snd_soc_dai_driver wm8770_dai = {
 551         .name = "wm8770-hifi",
 552         .playback = {
 553                 .stream_name = "Playback",
 554                 .channels_min = 2,
 555                 .channels_max = 2,
 556                 .rates = SNDRV_PCM_RATE_8000_192000,
 557                 .formats = WM8770_FORMATS
 558         },
 559         .capture = {
 560                 .stream_name = "Capture",
 561                 .channels_min = 2,
 562                 .channels_max = 2,
 563                 .rates = SNDRV_PCM_RATE_8000_96000,
 564                 .formats = WM8770_FORMATS
 565         },
 566         .ops = &wm8770_dai_ops,
 567         .symmetric_rates = 1
 568 };
 569
 570 static int wm8770_probe(struct snd_soc_codec *codec)
 571 {
 572         struct wm8770_priv *wm8770;
 573         int ret;
 574
 575         wm8770 = snd_soc_codec_get_drvdata(codec);
 576         wm8770->codec = codec;
 577
 578         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 579                                     wm8770->supplies);
 580         if (ret) {
 581                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 582                 return ret;
 583         }
 584
 585         ret = wm8770_reset(codec);
 586         if (ret < 0) {
 587                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 588                 goto err_reg_enable;
 589         }
 590
 591         /* latch the volume update bits */
 592         snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
 593         snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
 594         snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
 595         snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
 596         snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
 597         snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
 598         snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
 599         snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
 600         snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
 601         snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);
 602
 603         /* mute all DACs */
 604         snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);
 605
 606 err_reg_enable:
 607         regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 608         return ret;
 609 }
 610
 611 static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
 612         .probe = wm8770_probe,
 613         .set_bias_level = wm8770_set_bias_level,
 614         .idle_bias_off = true,
 615
 616         .controls = wm8770_snd_controls,
 617         .num_controls = ARRAY_SIZE(wm8770_snd_controls),
 618         .dapm_widgets = wm8770_dapm_widgets,
 619         .num_dapm_widgets = ARRAY_SIZE(wm8770_dapm_widgets),
 620         .dapm_routes = wm8770_intercon,
 621         .num_dapm_routes = ARRAY_SIZE(wm8770_intercon),
 622 };
 623
 624 static const struct of_device_id wm8770_of_match[] = {
 625         { .compatible = "wlf,wm8770", },
 626         { }
 627 };
 628 MODULE_DEVICE_TABLE(of, wm8770_of_match);
 629
 630 static const struct regmap_config wm8770_regmap = {
 631         .reg_bits = 7,
 632         .val_bits = 9,
 633         .max_register = WM8770_RESET,
 634
 635         .reg_defaults = wm8770_reg_defaults,
 636         .num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
 637         .cache_type = REGCACHE_RBTREE,
 638
 639         .volatile_reg = wm8770_volatile_reg,
 640 };
 641
 642 static int wm8770_spi_probe(struct spi_device *spi)
 643 {
 644         struct wm8770_priv *wm8770;
 645         int ret, i;
 646
 647         wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
 648                               GFP_KERNEL);
 649         if (!wm8770)
 650                 return -ENOMEM;
 651
 652         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
 653                 wm8770->supplies[i].supply = wm8770_supply_names[i];
 654
 655         ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
 656                                       wm8770->supplies);
 657         if (ret) {
 658                 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 659                 return ret;
 660         }
 661
 662         wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
 663         wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
 664         wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
 665
 666         /* This should really be moved into the regulator core */
 667         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
 668                 ret = regulator_register_notifier(wm8770->supplies[i].consumer,
 669                                                   &wm8770->disable_nb[i]);
 670                 if (ret) {
 671                         dev_err(&spi->dev,
 672                                 "Failed to register regulator notifier: %d\n",
 673                                 ret);
 674                 }
 675         }
 676
 677         wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
 678         if (IS_ERR(wm8770->regmap))
 679                 return PTR_ERR(wm8770->regmap);
 680
 681         spi_set_drvdata(spi, wm8770);
 682
 683         ret = snd_soc_register_codec(&spi->dev,
 684                                      &soc_codec_dev_wm8770, &wm8770_dai, 1);
 685
 686         return ret;
 687 }
 688
 689 static int wm8770_spi_remove(struct spi_device *spi)
 690 {
 691         struct wm8770_priv *wm8770 = spi_get_drvdata(spi);
 692         int i;
 693
 694         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
 695                 regulator_unregister_notifier(wm8770->supplies[i].consumer,
 696                                               &wm8770->disable_nb[i]);
 697
 698         snd_soc_unregister_codec(&spi->dev);
 699
 700         return 0;
 701 }
 702
 703 static struct spi_driver wm8770_spi_driver = {
 704         .driver = {
 705                 .name = "wm8770",
 706                 .owner = THIS_MODULE,
 707                 .of_match_table = wm8770_of_match,
 708         },
 709         .probe = wm8770_spi_probe,
 710         .remove = wm8770_spi_remove
 711 };
 712
 713 module_spi_driver(wm8770_spi_driver);
 714
 715 MODULE_DESCRIPTION("ASoC WM8770 driver");
 716 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
 717 MODULE_LICENSE("GPL");