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/regulator/consumer.h>
  21 #include <linux/slab.h>
  22 #include <sound/core.h>
  23 #include <sound/pcm.h>
  24 #include <sound/pcm_params.h>
  25 #include <sound/soc.h>
  26 #include <sound/initval.h>
  27 #include <sound/tlv.h>
  28
  29 #include "wm8770.h"
  30
  31 #define WM8770_NUM_SUPPLIES 3
  32 static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
  33         "AVDD1",
  34         "AVDD2",
  35         "DVDD"
  36 };
  37
  38 static const u16 wm8770_reg_defs[WM8770_CACHEREGNUM] = {
  39         0x7f, 0x7f, 0x7f, 0x7f,
  40         0x7f, 0x7f, 0x7f, 0x7f,
  41         0x7f, 0xff, 0xff, 0xff,
  42         0xff, 0xff, 0xff, 0xff,
  43         0xff, 0xff, 0, 0x90, 0,
  44         0, 0x22, 0x22, 0x3e,
  45         0xc, 0xc, 0x100, 0x189,
  46         0x189, 0x8770
  47 };
  48
  49 struct wm8770_priv {
  50         enum snd_soc_control_type control_type;
  51         struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
  52         struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
  53         struct snd_soc_codec *codec;
  54         int sysclk;
  55 };
  56
  57 static int vout12supply_event(struct snd_soc_dapm_widget *w,
  58         struct snd_kcontrol *kcontrol, int event);
  59 static int vout34supply_event(struct snd_soc_dapm_widget *w,
  60         struct snd_kcontrol *kcontrol, int event);
  61
  62 /*
  63  * We can't use the same notifier block for more than one supply and
  64  * there's no way I can see to get from a callback to the caller
  65  * except container_of().
  66  */
  67 #define WM8770_REGULATOR_EVENT(n) \
  68 static int wm8770_regulator_event_##n(struct notifier_block *nb, \
  69                                       unsigned long event, void *data)    \
  70 { \
  71         struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
  72                                      disable_nb[n]); \
  73         if (event & REGULATOR_EVENT_DISABLE) { \
  74                 wm8770->codec->cache_sync = 1; \
  75         } \
  76         return 0; \
  77 }
  78
  79 WM8770_REGULATOR_EVENT(0)
  80 WM8770_REGULATOR_EVENT(1)
  81 WM8770_REGULATOR_EVENT(2)
  82
  83 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
  84 static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
  85 static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
  86
  87 static const char *dac_phase_text[][2] = {
  88         { "DAC1 Normal", "DAC1 Inverted" },
  89         { "DAC2 Normal", "DAC2 Inverted" },
  90         { "DAC3 Normal", "DAC3 Inverted" },
  91         { "DAC4 Normal", "DAC4 Inverted" },
  92 };
  93
  94 static const struct soc_enum dac_phase[] = {
  95         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
  96         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
  97         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
  98         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
  99 };
 100
 101 static const struct snd_kcontrol_new wm8770_snd_controls[] = {
 102         /* global DAC playback controls */
 103         SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
 104                 dac_dig_tlv),
 105         SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
 106         SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
 107
 108         /* global VOUT playback controls */
 109         SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
 110                 dac_alg_tlv),
 111         SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
 112
 113         /* VOUT1/2/3/4 specific controls */
 114         SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
 115                 WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
 116         SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
 117                 WM8770_VOUT1RVOL, 7, 1, 0),
 118         SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
 119                 WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
 120         SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
 121                 WM8770_VOUT2RVOL, 7, 1, 0),
 122         SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
 123                 WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
 124         SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
 125                 WM8770_VOUT3RVOL, 7, 1, 0),
 126         SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
 127                 WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
 128         SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
 129                 WM8770_VOUT4RVOL, 7, 1, 0),
 130
 131         /* DAC1/2/3/4 specific controls */
 132         SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
 133                 WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
 134         SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
 135         SOC_ENUM("DAC1 Phase", dac_phase[0]),
 136         SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
 137                 WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
 138         SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
 139         SOC_ENUM("DAC2 Phase", dac_phase[1]),
 140         SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
 141                 WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
 142         SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
 143         SOC_ENUM("DAC3 Phase", dac_phase[2]),
 144         SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
 145                 WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
 146         SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
 147         SOC_ENUM("DAC4 Phase", dac_phase[3]),
 148
 149         /* ADC specific controls */
 150         SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 151                 0, 31, 0, adc_tlv),
 152         SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 153                 5, 1, 1),
 154
 155         /* other controls */
 156         SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
 157         SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
 158 };
 159
 160 static const char *ain_text[] = {
 161         "AIN1", "AIN2", "AIN3", "AIN4",
 162         "AIN5", "AIN6", "AIN7", "AIN8"
 163 };
 164
 165 static const struct soc_enum ain_enum =
 166         SOC_ENUM_DOUBLE(WM8770_ADCMUX, 0, 4, 8, ain_text);
 167
 168 static const struct snd_kcontrol_new ain_mux =
 169         SOC_DAPM_ENUM("Capture Mux", ain_enum);
 170
 171 static const struct snd_kcontrol_new vout1_mix_controls[] = {
 172         SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
 173         SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
 174         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
 175 };
 176
 177 static const struct snd_kcontrol_new vout2_mix_controls[] = {
 178         SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
 179         SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
 180         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
 181 };
 182
 183 static const struct snd_kcontrol_new vout3_mix_controls[] = {
 184         SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
 185         SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
 186         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
 187 };
 188
 189 static const struct snd_kcontrol_new vout4_mix_controls[] = {
 190         SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
 191         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
 192 };
 193
 194 static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
 195         SND_SOC_DAPM_INPUT("AUX1"),
 196         SND_SOC_DAPM_INPUT("AUX2"),
 197         SND_SOC_DAPM_INPUT("AUX3"),
 198
 199         SND_SOC_DAPM_INPUT("AIN1"),
 200         SND_SOC_DAPM_INPUT("AIN2"),
 201         SND_SOC_DAPM_INPUT("AIN3"),
 202         SND_SOC_DAPM_INPUT("AIN4"),
 203         SND_SOC_DAPM_INPUT("AIN5"),
 204         SND_SOC_DAPM_INPUT("AIN6"),
 205         SND_SOC_DAPM_INPUT("AIN7"),
 206         SND_SOC_DAPM_INPUT("AIN8"),
 207
 208         SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
 209
 210         SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
 211
 212         SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
 213         SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
 214         SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
 215         SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
 216
 217         SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
 218                 vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 219         SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
 220                 vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 221
 222         SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
 223                 vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
 224         SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
 225                 vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
 226         SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
 227                 vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
 228         SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
 229                 vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
 230
 231         SND_SOC_DAPM_OUTPUT("VOUT1"),
 232         SND_SOC_DAPM_OUTPUT("VOUT2"),
 233         SND_SOC_DAPM_OUTPUT("VOUT3"),
 234         SND_SOC_DAPM_OUTPUT("VOUT4")
 235 };
 236
 237 static const struct snd_soc_dapm_route wm8770_intercon[] = {
 238         { "Capture Mux", "AIN1", "AIN1" },
 239         { "Capture Mux", "AIN2", "AIN2" },
 240         { "Capture Mux", "AIN3", "AIN3" },
 241         { "Capture Mux", "AIN4", "AIN4" },
 242         { "Capture Mux", "AIN5", "AIN5" },
 243         { "Capture Mux", "AIN6", "AIN6" },
 244         { "Capture Mux", "AIN7", "AIN7" },
 245         { "Capture Mux", "AIN8", "AIN8" },
 246
 247         { "ADC", NULL, "Capture Mux" },
 248
 249         { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
 250         { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
 251         { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
 252         { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
 253
 254         { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
 255         { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
 256         { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
 257         { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
 258
 259         { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
 260         { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
 261         { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
 262         { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
 263
 264         { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
 265         { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
 266         { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
 267
 268         { "VOUT1", NULL, "VOUT1 Mixer" },
 269         { "VOUT2", NULL, "VOUT2 Mixer" },
 270         { "VOUT3", NULL, "VOUT3 Mixer" },
 271         { "VOUT4", NULL, "VOUT4 Mixer" }
 272 };
 273
 274 static int vout12supply_event(struct snd_soc_dapm_widget *w,
 275         struct snd_kcontrol *kcontrol, int event)
 276 {
 277         struct snd_soc_codec *codec;
 278
 279         codec = w->codec;
 280
 281         switch (event) {
 282         case SND_SOC_DAPM_PRE_PMU:
 283                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
 284                 break;
 285         case SND_SOC_DAPM_POST_PMD:
 286                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
 287                 break;
 288         }
 289
 290         return 0;
 291 }
 292
 293 static int vout34supply_event(struct snd_soc_dapm_widget *w,
 294         struct snd_kcontrol *kcontrol, int event)
 295 {
 296         struct snd_soc_codec *codec;
 297
 298         codec = w->codec;
 299
 300         switch (event) {
 301         case SND_SOC_DAPM_PRE_PMU:
 302                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
 303                 break;
 304         case SND_SOC_DAPM_POST_PMD:
 305                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
 306                 break;
 307         }
 308
 309         return 0;
 310 }
 311
 312 static int wm8770_reset(struct snd_soc_codec *codec)
 313 {
 314         return snd_soc_write(codec, WM8770_RESET, 0);
 315 }
 316
 317 static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 318 {
 319         struct snd_soc_codec *codec;
 320         int iface, master;
 321
 322         codec = dai->codec;
 323
 324         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 325         case SND_SOC_DAIFMT_CBM_CFM:
 326                 master = 0x100;
 327                 break;
 328         case SND_SOC_DAIFMT_CBS_CFS:
 329                 master = 0;
 330                 break;
 331         default:
 332                 return -EINVAL;
 333         }
 334
 335         iface = 0;
 336         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 337         case SND_SOC_DAIFMT_I2S:
 338                 iface |= 0x2;
 339                 break;
 340         case SND_SOC_DAIFMT_RIGHT_J:
 341                 break;
 342         case SND_SOC_DAIFMT_LEFT_J:
 343                 iface |= 0x1;
 344                 break;
 345         default:
 346                 return -EINVAL;
 347         }
 348
 349         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 350         case SND_SOC_DAIFMT_NB_NF:
 351                 break;
 352         case SND_SOC_DAIFMT_IB_IF:
 353                 iface |= 0xc;
 354                 break;
 355         case SND_SOC_DAIFMT_IB_NF:
 356                 iface |= 0x8;
 357                 break;
 358         case SND_SOC_DAIFMT_NB_IF:
 359                 iface |= 0x4;
 360                 break;
 361         default:
 362                 return -EINVAL;
 363         }
 364
 365         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
 366         snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);
 367
 368         return 0;
 369 }
 370
 371 static const int mclk_ratios[] = {
 372         128,
 373         192,
 374         256,
 375         384,
 376         512,
 377         768
 378 };
 379
 380 static int wm8770_hw_params(struct snd_pcm_substream *substream,
 381                             struct snd_pcm_hw_params *params,
 382                             struct snd_soc_dai *dai)
 383 {
 384         struct snd_soc_codec *codec;
 385         struct wm8770_priv *wm8770;
 386         int i;
 387         int iface;
 388         int shift;
 389         int ratio;
 390
 391         codec = dai->codec;
 392         wm8770 = snd_soc_codec_get_drvdata(codec);
 393
 394         iface = 0;
 395         switch (params_format(params)) {
 396         case SNDRV_PCM_FORMAT_S16_LE:
 397                 break;
 398         case SNDRV_PCM_FORMAT_S20_3LE:
 399                 iface |= 0x10;
 400                 break;
 401         case SNDRV_PCM_FORMAT_S24_LE:
 402                 iface |= 0x20;
 403                 break;
 404         case SNDRV_PCM_FORMAT_S32_LE:
 405                 iface |= 0x30;
 406                 break;
 407         }
 408
 409         switch (substream->stream) {
 410         case SNDRV_PCM_STREAM_PLAYBACK:
 411                 i = 0;
 412                 shift = 4;
 413                 break;
 414         case SNDRV_PCM_STREAM_CAPTURE:
 415                 i = 2;
 416                 shift = 0;
 417                 break;
 418         default:
 419                 return -EINVAL;
 420         }
 421
 422         /* Only need to set MCLK/LRCLK ratio if we're master */
 423         if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
 424                 for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
 425                         ratio = wm8770->sysclk / params_rate(params);
 426                         if (ratio == mclk_ratios[i])
 427                                 break;
 428                 }
 429
 430                 if (i == ARRAY_SIZE(mclk_ratios)) {
 431                         dev_err(codec->dev,
 432                                 "Unable to configure MCLK ratio %d/%d\n",
 433                                 wm8770->sysclk, params_rate(params));
 434                         return -EINVAL;
 435                 }
 436
 437                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 438
 439                 snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
 440                                     i << shift);
 441         }
 442
 443         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
 444
 445         return 0;
 446 }
 447
 448 static int wm8770_mute(struct snd_soc_dai *dai, int mute)
 449 {
 450         struct snd_soc_codec *codec;
 451
 452         codec = dai->codec;
 453         return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
 454                                    !!mute << 4);
 455 }
 456
 457 static int wm8770_set_sysclk(struct snd_soc_dai *dai,
 458                              int clk_id, unsigned int freq, int dir)
 459 {
 460         struct snd_soc_codec *codec;
 461         struct wm8770_priv *wm8770;
 462
 463         codec = dai->codec;
 464         wm8770 = snd_soc_codec_get_drvdata(codec);
 465         wm8770->sysclk = freq;
 466         return 0;
 467 }
 468
 469 static void wm8770_sync_cache(struct snd_soc_codec *codec)
 470 {
 471         int i;
 472         u16 *cache;
 473
 474         if (!codec->cache_sync)
 475                 return;
 476
 477         codec->cache_only = 0;
 478         cache = codec->reg_cache;
 479         for (i = 0; i < codec->driver->reg_cache_size; i++) {
 480                 if (i == WM8770_RESET || cache[i] == wm8770_reg_defs[i])
 481                         continue;
 482                 snd_soc_write(codec, i, cache[i]);
 483         }
 484         codec->cache_sync = 0;
 485 }
 486
 487 static int wm8770_set_bias_level(struct snd_soc_codec *codec,
 488                                  enum snd_soc_bias_level level)
 489 {
 490         int ret;
 491         struct wm8770_priv *wm8770;
 492
 493         wm8770 = snd_soc_codec_get_drvdata(codec);
 494
 495         switch (level) {
 496         case SND_SOC_BIAS_ON:
 497                 break;
 498         case SND_SOC_BIAS_PREPARE:
 499                 break;
 500         case SND_SOC_BIAS_STANDBY:
 501                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 502                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 503                                                     wm8770->supplies);
 504                         if (ret) {
 505                                 dev_err(codec->dev,
 506                                         "Failed to enable supplies: %d\n",
 507                                         ret);
 508                                 return ret;
 509                         }
 510                         wm8770_sync_cache(codec);
 511                         /* global powerup */
 512                         snd_soc_write(codec, WM8770_PWDNCTRL, 0);
 513                 }
 514                 break;
 515         case SND_SOC_BIAS_OFF:
 516                 /* global powerdown */
 517                 snd_soc_write(codec, WM8770_PWDNCTRL, 1);
 518                 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
 519                                        wm8770->supplies);
 520                 break;
 521         }
 522
 523         codec->dapm.bias_level = level;
 524         return 0;
 525 }
 526
 527 #define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 528                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 529
 530 static const struct snd_soc_dai_ops wm8770_dai_ops = {
 531         .digital_mute = wm8770_mute,
 532         .hw_params = wm8770_hw_params,
 533         .set_fmt = wm8770_set_fmt,
 534         .set_sysclk = wm8770_set_sysclk,
 535 };
 536
 537 static struct snd_soc_dai_driver wm8770_dai = {
 538         .name = "wm8770-hifi",
 539         .playback = {
 540                 .stream_name = "Playback",
 541                 .channels_min = 2,
 542                 .channels_max = 2,
 543                 .rates = SNDRV_PCM_RATE_8000_192000,
 544                 .formats = WM8770_FORMATS
 545         },
 546         .capture = {
 547                 .stream_name = "Capture",
 548                 .channels_min = 2,
 549                 .channels_max = 2,
 550                 .rates = SNDRV_PCM_RATE_8000_96000,
 551                 .formats = WM8770_FORMATS
 552         },
 553         .ops = &wm8770_dai_ops,
 554         .symmetric_rates = 1
 555 };
 556
 557 #ifdef CONFIG_PM
 558 static int wm8770_suspend(struct snd_soc_codec *codec)
 559 {
 560         wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
 561         return 0;
 562 }
 563
 564 static int wm8770_resume(struct snd_soc_codec *codec)
 565 {
 566         wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 567         return 0;
 568 }
 569 #else
 570 #define wm8770_suspend NULL
 571 #define wm8770_resume NULL
 572 #endif
 573
 574 static int wm8770_probe(struct snd_soc_codec *codec)
 575 {
 576         struct wm8770_priv *wm8770;
 577         int ret;
 578         int i;
 579
 580         wm8770 = snd_soc_codec_get_drvdata(codec);
 581         wm8770->codec = codec;
 582
 583         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8770->control_type);
 584         if (ret < 0) {
 585                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 586                 return ret;
 587         }
 588
 589         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
 590                 wm8770->supplies[i].supply = wm8770_supply_names[i];
 591
 592         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8770->supplies),
 593                                  wm8770->supplies);
 594         if (ret) {
 595                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 596                 return ret;
 597         }
 598
 599         wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
 600         wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
 601         wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
 602
 603         /* This should really be moved into the regulator core */
 604         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
 605                 ret = regulator_register_notifier(wm8770->supplies[i].consumer,
 606                                                   &wm8770->disable_nb[i]);
 607                 if (ret) {
 608                         dev_err(codec->dev,
 609                                 "Failed to register regulator notifier: %d\n",
 610                                 ret);
 611                 }
 612         }
 613
 614         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 615                                     wm8770->supplies);
 616         if (ret) {
 617                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 618                 goto err_reg_get;
 619         }
 620
 621         ret = wm8770_reset(codec);
 622         if (ret < 0) {
 623                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 624                 goto err_reg_enable;
 625         }
 626
 627         wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 628
 629         /* latch the volume update bits */
 630         snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
 631         snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
 632         snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
 633         snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
 634         snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
 635         snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
 636         snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
 637         snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
 638         snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
 639         snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);
 640
 641         /* mute all DACs */
 642         snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);
 643
 644         snd_soc_add_codec_controls(codec, wm8770_snd_controls,
 645                              ARRAY_SIZE(wm8770_snd_controls));
 646         snd_soc_dapm_new_controls(&codec->dapm, wm8770_dapm_widgets,
 647                                   ARRAY_SIZE(wm8770_dapm_widgets));
 648         snd_soc_dapm_add_routes(&codec->dapm, wm8770_intercon,
 649                                 ARRAY_SIZE(wm8770_intercon));
 650         return 0;
 651
 652 err_reg_enable:
 653         regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 654 err_reg_get:
 655         regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 656         return ret;
 657 }
 658
 659 static int wm8770_remove(struct snd_soc_codec *codec)
 660 {
 661         struct wm8770_priv *wm8770;
 662         int i;
 663
 664         wm8770 = snd_soc_codec_get_drvdata(codec);
 665         wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
 666
 667         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
 668                 regulator_unregister_notifier(wm8770->supplies[i].consumer,
 669                                               &wm8770->disable_nb[i]);
 670         regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 671         return 0;
 672 }
 673
 674 static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
 675         .probe = wm8770_probe,
 676         .remove = wm8770_remove,
 677         .suspend = wm8770_suspend,
 678         .resume = wm8770_resume,
 679         .set_bias_level = wm8770_set_bias_level,
 680         .idle_bias_off = true,
 681         .reg_cache_size = ARRAY_SIZE(wm8770_reg_defs),
 682         .reg_word_size = sizeof (u16),
 683         .reg_cache_default = wm8770_reg_defs
 684 };
 685
 686 static const struct of_device_id wm8770_of_match[] = {
 687         { .compatible = "wlf,wm8770", },
 688         { }
 689 };
 690 MODULE_DEVICE_TABLE(of, wm8770_of_match);
 691
 692 static int __devinit wm8770_spi_probe(struct spi_device *spi)
 693 {
 694         struct wm8770_priv *wm8770;
 695         int ret;
 696
 697         wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
 698                               GFP_KERNEL);
 699         if (!wm8770)
 700                 return -ENOMEM;
 701
 702         wm8770->control_type = SND_SOC_SPI;
 703         spi_set_drvdata(spi, wm8770);
 704
 705         ret = snd_soc_register_codec(&spi->dev,
 706                                      &soc_codec_dev_wm8770, &wm8770_dai, 1);
 707
 708         return ret;
 709 }
 710
 711 static int __devexit wm8770_spi_remove(struct spi_device *spi)
 712 {
 713         snd_soc_unregister_codec(&spi->dev);
 714         return 0;
 715 }
 716
 717 static struct spi_driver wm8770_spi_driver = {
 718         .driver = {
 719                 .name = "wm8770",
 720                 .owner = THIS_MODULE,
 721                 .of_match_table = wm8770_of_match,
 722         },
 723         .probe = wm8770_spi_probe,
 724         .remove = __devexit_p(wm8770_spi_remove)
 725 };
 726
 727 static int __init wm8770_modinit(void)
 728 {
 729         int ret = 0;
 730
 731         ret = spi_register_driver(&wm8770_spi_driver);
 732         if (ret) {
 733                 printk(KERN_ERR "Failed to register wm8770 SPI driver: %d\n",
 734                        ret);
 735         }
 736         return ret;
 737 }
 738 module_init(wm8770_modinit);
 739
 740 static void __exit wm8770_exit(void)
 741 {
 742         spi_unregister_driver(&wm8770_spi_driver);
 743 }
 744 module_exit(wm8770_exit);
 745
 746 MODULE_DESCRIPTION("ASoC WM8770 driver");
 747 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
 748 MODULE_LICENSE("GPL");