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/platform_device.h>
  20 #include <linux/spi/spi.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 u16 wm8770_reg_defs[WM8770_CACHEREGNUM] = {
  40         0x7f, 0x7f, 0x7f, 0x7f,
  41         0x7f, 0x7f, 0x7f, 0x7f,
  42         0x7f, 0xff, 0xff, 0xff,
  43         0xff, 0xff, 0xff, 0xff,
  44         0xff, 0xff, 0, 0x90, 0,
  45         0, 0x22, 0x22, 0x3e,
  46         0xc, 0xc, 0x100, 0x189,
  47         0x189, 0x8770
  48 };
  49
  50 struct wm8770_priv {
  51         enum snd_soc_control_type control_type;
  52         struct regulator_bulk_data supplies[WM8770_NUM_SUPPLIES];
  53         struct notifier_block disable_nb[WM8770_NUM_SUPPLIES];
  54         struct snd_soc_codec *codec;
  55         int sysclk;
  56 };
  57
  58 static int vout12supply_event(struct snd_soc_dapm_widget *w,
  59         struct snd_kcontrol *kcontrol, int event);
  60 static int vout34supply_event(struct snd_soc_dapm_widget *w,
  61         struct snd_kcontrol *kcontrol, int event);
  62
  63 /*
  64  * We can't use the same notifier block for more than one supply and
  65  * there's no way I can see to get from a callback to the caller
  66  * except container_of().
  67  */
  68 #define WM8770_REGULATOR_EVENT(n) \
  69 static int wm8770_regulator_event_##n(struct notifier_block *nb, \
  70                                       unsigned long event, void *data)    \
  71 { \
  72         struct wm8770_priv *wm8770 = container_of(nb, struct wm8770_priv, \
  73                                      disable_nb[n]); \
  74         if (event & REGULATOR_EVENT_DISABLE) { \
  75                 wm8770->codec->cache_sync = 1; \
  76         } \
  77         return 0; \
  78 }
  79
  80 WM8770_REGULATOR_EVENT(0)
  81 WM8770_REGULATOR_EVENT(1)
  82 WM8770_REGULATOR_EVENT(2)
  83
  84 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
  85 static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
  86 static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
  87
  88 static const char *dac_phase_text[][2] = {
  89         { "DAC1 Normal", "DAC1 Inverted" },
  90         { "DAC2 Normal", "DAC2 Inverted" },
  91         { "DAC3 Normal", "DAC3 Inverted" },
  92         { "DAC4 Normal", "DAC4 Inverted" },
  93 };
  94
  95 static const struct soc_enum dac_phase[] = {
  96         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 0, 1, 2, dac_phase_text[0]),
  97         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 2, 3, 2, dac_phase_text[1]),
  98         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 4, 5, 2, dac_phase_text[2]),
  99         SOC_ENUM_DOUBLE(WM8770_DACPHASE, 6, 7, 2, dac_phase_text[3]),
 100 };
 101
 102 static const struct snd_kcontrol_new wm8770_snd_controls[] = {
 103         /* global DAC playback controls */
 104         SOC_SINGLE_TLV("DAC Playback Volume", WM8770_MSDIGVOL, 0, 255, 0,
 105                 dac_dig_tlv),
 106         SOC_SINGLE("DAC Playback Switch", WM8770_DACMUTE, 4, 1, 1),
 107         SOC_SINGLE("DAC Playback ZC Switch", WM8770_DACCTRL1, 0, 1, 0),
 108
 109         /* global VOUT playback controls */
 110         SOC_SINGLE_TLV("VOUT Playback Volume", WM8770_MSALGVOL, 0, 127, 0,
 111                 dac_alg_tlv),
 112         SOC_SINGLE("VOUT Playback ZC Switch", WM8770_MSALGVOL, 7, 1, 0),
 113
 114         /* VOUT1/2/3/4 specific controls */
 115         SOC_DOUBLE_R_TLV("VOUT1 Playback Volume", WM8770_VOUT1LVOL,
 116                 WM8770_VOUT1RVOL, 0, 127, 0, dac_alg_tlv),
 117         SOC_DOUBLE_R("VOUT1 Playback ZC Switch", WM8770_VOUT1LVOL,
 118                 WM8770_VOUT1RVOL, 7, 1, 0),
 119         SOC_DOUBLE_R_TLV("VOUT2 Playback Volume", WM8770_VOUT2LVOL,
 120                 WM8770_VOUT2RVOL, 0, 127, 0, dac_alg_tlv),
 121         SOC_DOUBLE_R("VOUT2 Playback ZC Switch", WM8770_VOUT2LVOL,
 122                 WM8770_VOUT2RVOL, 7, 1, 0),
 123         SOC_DOUBLE_R_TLV("VOUT3 Playback Volume", WM8770_VOUT3LVOL,
 124                 WM8770_VOUT3RVOL, 0, 127, 0, dac_alg_tlv),
 125         SOC_DOUBLE_R("VOUT3 Playback ZC Switch", WM8770_VOUT3LVOL,
 126                 WM8770_VOUT3RVOL, 7, 1, 0),
 127         SOC_DOUBLE_R_TLV("VOUT4 Playback Volume", WM8770_VOUT4LVOL,
 128                 WM8770_VOUT4RVOL, 0, 127, 0, dac_alg_tlv),
 129         SOC_DOUBLE_R("VOUT4 Playback ZC Switch", WM8770_VOUT4LVOL,
 130                 WM8770_VOUT4RVOL, 7, 1, 0),
 131
 132         /* DAC1/2/3/4 specific controls */
 133         SOC_DOUBLE_R_TLV("DAC1 Playback Volume", WM8770_DAC1LVOL,
 134                 WM8770_DAC1RVOL, 0, 255, 0, dac_dig_tlv),
 135         SOC_SINGLE("DAC1 Deemphasis Switch", WM8770_DACCTRL2, 0, 1, 0),
 136         SOC_ENUM("DAC1 Phase", dac_phase[0]),
 137         SOC_DOUBLE_R_TLV("DAC2 Playback Volume", WM8770_DAC2LVOL,
 138                 WM8770_DAC2RVOL, 0, 255, 0, dac_dig_tlv),
 139         SOC_SINGLE("DAC2 Deemphasis Switch", WM8770_DACCTRL2, 1, 1, 0),
 140         SOC_ENUM("DAC2 Phase", dac_phase[1]),
 141         SOC_DOUBLE_R_TLV("DAC3 Playback Volume", WM8770_DAC3LVOL,
 142                 WM8770_DAC3RVOL, 0, 255, 0, dac_dig_tlv),
 143         SOC_SINGLE("DAC3 Deemphasis Switch", WM8770_DACCTRL2, 2, 1, 0),
 144         SOC_ENUM("DAC3 Phase", dac_phase[2]),
 145         SOC_DOUBLE_R_TLV("DAC4 Playback Volume", WM8770_DAC4LVOL,
 146                 WM8770_DAC4RVOL, 0, 255, 0, dac_dig_tlv),
 147         SOC_SINGLE("DAC4 Deemphasis Switch", WM8770_DACCTRL2, 3, 1, 0),
 148         SOC_ENUM("DAC4 Phase", dac_phase[3]),
 149
 150         /* ADC specific controls */
 151         SOC_DOUBLE_R_TLV("Capture Volume", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 152                 0, 31, 0, adc_tlv),
 153         SOC_DOUBLE_R("Capture Switch", WM8770_ADCLCTRL, WM8770_ADCRCTRL,
 154                 5, 1, 1),
 155
 156         /* other controls */
 157         SOC_SINGLE("ADC 128x Oversampling Switch", WM8770_MSTRCTRL, 3, 1, 0),
 158         SOC_SINGLE("ADC Highpass Filter Switch", WM8770_IFACECTRL, 8, 1, 1)
 159 };
 160
 161 static const char *ain_text[] = {
 162         "AIN1", "AIN2", "AIN3", "AIN4",
 163         "AIN5", "AIN6", "AIN7", "AIN8"
 164 };
 165
 166 static SOC_ENUM_DOUBLE_DECL(ain_enum,
 167                             WM8770_ADCMUX, 0, 4, ain_text);
 168
 169 static const struct snd_kcontrol_new ain_mux =
 170         SOC_DAPM_ENUM("Capture Mux", ain_enum);
 171
 172 static const struct snd_kcontrol_new vout1_mix_controls[] = {
 173         SOC_DAPM_SINGLE("DAC1 Switch", WM8770_OUTMUX1, 0, 1, 0),
 174         SOC_DAPM_SINGLE("AUX1 Switch", WM8770_OUTMUX1, 1, 1, 0),
 175         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 2, 1, 0)
 176 };
 177
 178 static const struct snd_kcontrol_new vout2_mix_controls[] = {
 179         SOC_DAPM_SINGLE("DAC2 Switch", WM8770_OUTMUX1, 3, 1, 0),
 180         SOC_DAPM_SINGLE("AUX2 Switch", WM8770_OUTMUX1, 4, 1, 0),
 181         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX1, 5, 1, 0)
 182 };
 183
 184 static const struct snd_kcontrol_new vout3_mix_controls[] = {
 185         SOC_DAPM_SINGLE("DAC3 Switch", WM8770_OUTMUX2, 0, 1, 0),
 186         SOC_DAPM_SINGLE("AUX3 Switch", WM8770_OUTMUX2, 1, 1, 0),
 187         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 2, 1, 0)
 188 };
 189
 190 static const struct snd_kcontrol_new vout4_mix_controls[] = {
 191         SOC_DAPM_SINGLE("DAC4 Switch", WM8770_OUTMUX2, 3, 1, 0),
 192         SOC_DAPM_SINGLE("Bypass Switch", WM8770_OUTMUX2, 4, 1, 0)
 193 };
 194
 195 static const struct snd_soc_dapm_widget wm8770_dapm_widgets[] = {
 196         SND_SOC_DAPM_INPUT("AUX1"),
 197         SND_SOC_DAPM_INPUT("AUX2"),
 198         SND_SOC_DAPM_INPUT("AUX3"),
 199
 200         SND_SOC_DAPM_INPUT("AIN1"),
 201         SND_SOC_DAPM_INPUT("AIN2"),
 202         SND_SOC_DAPM_INPUT("AIN3"),
 203         SND_SOC_DAPM_INPUT("AIN4"),
 204         SND_SOC_DAPM_INPUT("AIN5"),
 205         SND_SOC_DAPM_INPUT("AIN6"),
 206         SND_SOC_DAPM_INPUT("AIN7"),
 207         SND_SOC_DAPM_INPUT("AIN8"),
 208
 209         SND_SOC_DAPM_MUX("Capture Mux", WM8770_ADCMUX, 8, 1, &ain_mux),
 210
 211         SND_SOC_DAPM_ADC("ADC", "Capture", WM8770_PWDNCTRL, 1, 1),
 212
 213         SND_SOC_DAPM_DAC("DAC1", "Playback", WM8770_PWDNCTRL, 2, 1),
 214         SND_SOC_DAPM_DAC("DAC2", "Playback", WM8770_PWDNCTRL, 3, 1),
 215         SND_SOC_DAPM_DAC("DAC3", "Playback", WM8770_PWDNCTRL, 4, 1),
 216         SND_SOC_DAPM_DAC("DAC4", "Playback", WM8770_PWDNCTRL, 5, 1),
 217
 218         SND_SOC_DAPM_SUPPLY("VOUT12 Supply", SND_SOC_NOPM, 0, 0,
 219                 vout12supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 220         SND_SOC_DAPM_SUPPLY("VOUT34 Supply", SND_SOC_NOPM, 0, 0,
 221                 vout34supply_event, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
 222
 223         SND_SOC_DAPM_MIXER("VOUT1 Mixer", SND_SOC_NOPM, 0, 0,
 224                 vout1_mix_controls, ARRAY_SIZE(vout1_mix_controls)),
 225         SND_SOC_DAPM_MIXER("VOUT2 Mixer", SND_SOC_NOPM, 0, 0,
 226                 vout2_mix_controls, ARRAY_SIZE(vout2_mix_controls)),
 227         SND_SOC_DAPM_MIXER("VOUT3 Mixer", SND_SOC_NOPM, 0, 0,
 228                 vout3_mix_controls, ARRAY_SIZE(vout3_mix_controls)),
 229         SND_SOC_DAPM_MIXER("VOUT4 Mixer", SND_SOC_NOPM, 0, 0,
 230                 vout4_mix_controls, ARRAY_SIZE(vout4_mix_controls)),
 231
 232         SND_SOC_DAPM_OUTPUT("VOUT1"),
 233         SND_SOC_DAPM_OUTPUT("VOUT2"),
 234         SND_SOC_DAPM_OUTPUT("VOUT3"),
 235         SND_SOC_DAPM_OUTPUT("VOUT4")
 236 };
 237
 238 static const struct snd_soc_dapm_route wm8770_intercon[] = {
 239         { "Capture Mux", "AIN1", "AIN1" },
 240         { "Capture Mux", "AIN2", "AIN2" },
 241         { "Capture Mux", "AIN3", "AIN3" },
 242         { "Capture Mux", "AIN4", "AIN4" },
 243         { "Capture Mux", "AIN5", "AIN5" },
 244         { "Capture Mux", "AIN6", "AIN6" },
 245         { "Capture Mux", "AIN7", "AIN7" },
 246         { "Capture Mux", "AIN8", "AIN8" },
 247
 248         { "ADC", NULL, "Capture Mux" },
 249
 250         { "VOUT1 Mixer", NULL, "VOUT12 Supply" },
 251         { "VOUT1 Mixer", "DAC1 Switch", "DAC1" },
 252         { "VOUT1 Mixer", "AUX1 Switch", "AUX1" },
 253         { "VOUT1 Mixer", "Bypass Switch", "Capture Mux" },
 254
 255         { "VOUT2 Mixer", NULL, "VOUT12 Supply" },
 256         { "VOUT2 Mixer", "DAC2 Switch", "DAC2" },
 257         { "VOUT2 Mixer", "AUX2 Switch", "AUX2" },
 258         { "VOUT2 Mixer", "Bypass Switch", "Capture Mux" },
 259
 260         { "VOUT3 Mixer", NULL, "VOUT34 Supply" },
 261         { "VOUT3 Mixer", "DAC3 Switch", "DAC3" },
 262         { "VOUT3 Mixer", "AUX3 Switch", "AUX3" },
 263         { "VOUT3 Mixer", "Bypass Switch", "Capture Mux" },
 264
 265         { "VOUT4 Mixer", NULL, "VOUT34 Supply" },
 266         { "VOUT4 Mixer", "DAC4 Switch", "DAC4" },
 267         { "VOUT4 Mixer", "Bypass Switch", "Capture Mux" },
 268
 269         { "VOUT1", NULL, "VOUT1 Mixer" },
 270         { "VOUT2", NULL, "VOUT2 Mixer" },
 271         { "VOUT3", NULL, "VOUT3 Mixer" },
 272         { "VOUT4", NULL, "VOUT4 Mixer" }
 273 };
 274
 275 static int vout12supply_event(struct snd_soc_dapm_widget *w,
 276         struct snd_kcontrol *kcontrol, int event)
 277 {
 278         struct snd_soc_codec *codec;
 279
 280         codec = w->codec;
 281
 282         switch (event) {
 283         case SND_SOC_DAPM_PRE_PMU:
 284                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0);
 285                 break;
 286         case SND_SOC_DAPM_POST_PMD:
 287                 snd_soc_update_bits(codec, WM8770_OUTMUX1, 0x180, 0x180);
 288                 break;
 289         }
 290
 291         return 0;
 292 }
 293
 294 static int vout34supply_event(struct snd_soc_dapm_widget *w,
 295         struct snd_kcontrol *kcontrol, int event)
 296 {
 297         struct snd_soc_codec *codec;
 298
 299         codec = w->codec;
 300
 301         switch (event) {
 302         case SND_SOC_DAPM_PRE_PMU:
 303                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0);
 304                 break;
 305         case SND_SOC_DAPM_POST_PMD:
 306                 snd_soc_update_bits(codec, WM8770_OUTMUX2, 0x180, 0x180);
 307                 break;
 308         }
 309
 310         return 0;
 311 }
 312
 313 static int wm8770_reset(struct snd_soc_codec *codec)
 314 {
 315         return snd_soc_write(codec, WM8770_RESET, 0);
 316 }
 317
 318 static int wm8770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 319 {
 320         struct snd_soc_codec *codec;
 321         int iface, master;
 322
 323         codec = dai->codec;
 324
 325         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 326         case SND_SOC_DAIFMT_CBM_CFM:
 327                 master = 0x100;
 328                 break;
 329         case SND_SOC_DAIFMT_CBS_CFS:
 330                 master = 0;
 331                 break;
 332         default:
 333                 return -EINVAL;
 334         }
 335
 336         iface = 0;
 337         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 338         case SND_SOC_DAIFMT_I2S:
 339                 iface |= 0x2;
 340                 break;
 341         case SND_SOC_DAIFMT_RIGHT_J:
 342                 break;
 343         case SND_SOC_DAIFMT_LEFT_J:
 344                 iface |= 0x1;
 345                 break;
 346         default:
 347                 return -EINVAL;
 348         }
 349
 350         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 351         case SND_SOC_DAIFMT_NB_NF:
 352                 break;
 353         case SND_SOC_DAIFMT_IB_IF:
 354                 iface |= 0xc;
 355                 break;
 356         case SND_SOC_DAIFMT_IB_NF:
 357                 iface |= 0x8;
 358                 break;
 359         case SND_SOC_DAIFMT_NB_IF:
 360                 iface |= 0x4;
 361                 break;
 362         default:
 363                 return -EINVAL;
 364         }
 365
 366         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0xf, iface);
 367         snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x100, master);
 368
 369         return 0;
 370 }
 371
 372 static const int mclk_ratios[] = {
 373         128,
 374         192,
 375         256,
 376         384,
 377         512,
 378         768
 379 };
 380
 381 static int wm8770_hw_params(struct snd_pcm_substream *substream,
 382                             struct snd_pcm_hw_params *params,
 383                             struct snd_soc_dai *dai)
 384 {
 385         struct snd_soc_codec *codec;
 386         struct wm8770_priv *wm8770;
 387         int i;
 388         int iface;
 389         int shift;
 390         int ratio;
 391
 392         codec = dai->codec;
 393         wm8770 = snd_soc_codec_get_drvdata(codec);
 394
 395         iface = 0;
 396         switch (params_format(params)) {
 397         case SNDRV_PCM_FORMAT_S16_LE:
 398                 break;
 399         case SNDRV_PCM_FORMAT_S20_3LE:
 400                 iface |= 0x10;
 401                 break;
 402         case SNDRV_PCM_FORMAT_S24_LE:
 403                 iface |= 0x20;
 404                 break;
 405         case SNDRV_PCM_FORMAT_S32_LE:
 406                 iface |= 0x30;
 407                 break;
 408         }
 409
 410         switch (substream->stream) {
 411         case SNDRV_PCM_STREAM_PLAYBACK:
 412                 i = 0;
 413                 shift = 4;
 414                 break;
 415         case SNDRV_PCM_STREAM_CAPTURE:
 416                 i = 2;
 417                 shift = 0;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         /* Only need to set MCLK/LRCLK ratio if we're master */
 424         if (snd_soc_read(codec, WM8770_MSTRCTRL) & 0x100) {
 425                 for (; i < ARRAY_SIZE(mclk_ratios); ++i) {
 426                         ratio = wm8770->sysclk / params_rate(params);
 427                         if (ratio == mclk_ratios[i])
 428                                 break;
 429                 }
 430
 431                 if (i == ARRAY_SIZE(mclk_ratios)) {
 432                         dev_err(codec->dev,
 433                                 "Unable to configure MCLK ratio %d/%d\n",
 434                                 wm8770->sysclk, params_rate(params));
 435                         return -EINVAL;
 436                 }
 437
 438                 dev_dbg(codec->dev, "MCLK is %dfs\n", mclk_ratios[i]);
 439
 440                 snd_soc_update_bits(codec, WM8770_MSTRCTRL, 0x7 << shift,
 441                                     i << shift);
 442         }
 443
 444         snd_soc_update_bits(codec, WM8770_IFACECTRL, 0x30, iface);
 445
 446         return 0;
 447 }
 448
 449 static int wm8770_mute(struct snd_soc_dai *dai, int mute)
 450 {
 451         struct snd_soc_codec *codec;
 452
 453         codec = dai->codec;
 454         return snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10,
 455                                    !!mute << 4);
 456 }
 457
 458 static int wm8770_set_sysclk(struct snd_soc_dai *dai,
 459                              int clk_id, unsigned int freq, int dir)
 460 {
 461         struct snd_soc_codec *codec;
 462         struct wm8770_priv *wm8770;
 463
 464         codec = dai->codec;
 465         wm8770 = snd_soc_codec_get_drvdata(codec);
 466         wm8770->sysclk = freq;
 467         return 0;
 468 }
 469
 470 static void wm8770_sync_cache(struct snd_soc_codec *codec)
 471 {
 472         int i;
 473         u16 *cache;
 474
 475         if (!codec->cache_sync)
 476                 return;
 477
 478         codec->cache_only = 0;
 479         cache = codec->reg_cache;
 480         for (i = 0; i < codec->driver->reg_cache_size; i++) {
 481                 if (i == WM8770_RESET || cache[i] == wm8770_reg_defs[i])
 482                         continue;
 483                 snd_soc_write(codec, i, cache[i]);
 484         }
 485         codec->cache_sync = 0;
 486 }
 487
 488 static int wm8770_set_bias_level(struct snd_soc_codec *codec,
 489                                  enum snd_soc_bias_level level)
 490 {
 491         int ret;
 492         struct wm8770_priv *wm8770;
 493
 494         wm8770 = snd_soc_codec_get_drvdata(codec);
 495
 496         switch (level) {
 497         case SND_SOC_BIAS_ON:
 498                 break;
 499         case SND_SOC_BIAS_PREPARE:
 500                 break;
 501         case SND_SOC_BIAS_STANDBY:
 502                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 503                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 504                                                     wm8770->supplies);
 505                         if (ret) {
 506                                 dev_err(codec->dev,
 507                                         "Failed to enable supplies: %d\n",
 508                                         ret);
 509                                 return ret;
 510                         }
 511                         wm8770_sync_cache(codec);
 512                         /* global powerup */
 513                         snd_soc_write(codec, WM8770_PWDNCTRL, 0);
 514                 }
 515                 break;
 516         case SND_SOC_BIAS_OFF:
 517                 /* global powerdown */
 518                 snd_soc_write(codec, WM8770_PWDNCTRL, 1);
 519                 regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies),
 520                                        wm8770->supplies);
 521                 break;
 522         }
 523
 524         codec->dapm.bias_level = level;
 525         return 0;
 526 }
 527
 528 #define WM8770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 529                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 530
 531 static struct snd_soc_dai_ops wm8770_dai_ops = {
 532         .digital_mute = wm8770_mute,
 533         .hw_params = wm8770_hw_params,
 534         .set_fmt = wm8770_set_fmt,
 535         .set_sysclk = wm8770_set_sysclk,
 536 };
 537
 538 static struct snd_soc_dai_driver wm8770_dai = {
 539         .name = "wm8770-hifi",
 540         .playback = {
 541                 .stream_name = "Playback",
 542                 .channels_min = 2,
 543                 .channels_max = 2,
 544                 .rates = SNDRV_PCM_RATE_8000_192000,
 545                 .formats = WM8770_FORMATS
 546         },
 547         .capture = {
 548                 .stream_name = "Capture",
 549                 .channels_min = 2,
 550                 .channels_max = 2,
 551                 .rates = SNDRV_PCM_RATE_8000_96000,
 552                 .formats = WM8770_FORMATS
 553         },
 554         .ops = &wm8770_dai_ops,
 555         .symmetric_rates = 1
 556 };
 557
 558 #ifdef CONFIG_PM
 559 static int wm8770_suspend(struct snd_soc_codec *codec, pm_message_t state)
 560 {
 561         wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
 562         return 0;
 563 }
 564
 565 static int wm8770_resume(struct snd_soc_codec *codec)
 566 {
 567         wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 568         return 0;
 569 }
 570 #else
 571 #define wm8770_suspend NULL
 572 #define wm8770_resume NULL
 573 #endif
 574
 575 static int wm8770_probe(struct snd_soc_codec *codec)
 576 {
 577         struct wm8770_priv *wm8770;
 578         int ret;
 579         int i;
 580
 581         wm8770 = snd_soc_codec_get_drvdata(codec);
 582         wm8770->codec = codec;
 583
 584         codec->dapm.idle_bias_off = 1;
 585
 586         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8770->control_type);
 587         if (ret < 0) {
 588                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 589                 return ret;
 590         }
 591
 592         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
 593                 wm8770->supplies[i].supply = wm8770_supply_names[i];
 594
 595         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8770->supplies),
 596                                  wm8770->supplies);
 597         if (ret) {
 598                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 599                 return ret;
 600         }
 601
 602         wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
 603         wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
 604         wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
 605
 606         /* This should really be moved into the regulator core */
 607         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
 608                 ret = regulator_register_notifier(wm8770->supplies[i].consumer,
 609                                                   &wm8770->disable_nb[i]);
 610                 if (ret) {
 611                         dev_err(codec->dev,
 612                                 "Failed to register regulator notifier: %d\n",
 613                                 ret);
 614                 }
 615         }
 616
 617         ret = regulator_bulk_enable(ARRAY_SIZE(wm8770->supplies),
 618                                     wm8770->supplies);
 619         if (ret) {
 620                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 621                 goto err_reg_get;
 622         }
 623
 624         ret = wm8770_reset(codec);
 625         if (ret < 0) {
 626                 dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
 627                 goto err_reg_enable;
 628         }
 629
 630         wm8770_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 631
 632         /* latch the volume update bits */
 633         snd_soc_update_bits(codec, WM8770_MSDIGVOL, 0x100, 0x100);
 634         snd_soc_update_bits(codec, WM8770_MSALGVOL, 0x100, 0x100);
 635         snd_soc_update_bits(codec, WM8770_VOUT1RVOL, 0x100, 0x100);
 636         snd_soc_update_bits(codec, WM8770_VOUT2RVOL, 0x100, 0x100);
 637         snd_soc_update_bits(codec, WM8770_VOUT3RVOL, 0x100, 0x100);
 638         snd_soc_update_bits(codec, WM8770_VOUT4RVOL, 0x100, 0x100);
 639         snd_soc_update_bits(codec, WM8770_DAC1RVOL, 0x100, 0x100);
 640         snd_soc_update_bits(codec, WM8770_DAC2RVOL, 0x100, 0x100);
 641         snd_soc_update_bits(codec, WM8770_DAC3RVOL, 0x100, 0x100);
 642         snd_soc_update_bits(codec, WM8770_DAC4RVOL, 0x100, 0x100);
 643
 644         /* mute all DACs */
 645         snd_soc_update_bits(codec, WM8770_DACMUTE, 0x10, 0x10);
 646
 647         snd_soc_add_controls(codec, wm8770_snd_controls,
 648                              ARRAY_SIZE(wm8770_snd_controls));
 649         snd_soc_dapm_new_controls(&codec->dapm, wm8770_dapm_widgets,
 650                                   ARRAY_SIZE(wm8770_dapm_widgets));
 651         snd_soc_dapm_add_routes(&codec->dapm, wm8770_intercon,
 652                                 ARRAY_SIZE(wm8770_intercon));
 653         return 0;
 654
 655 err_reg_enable:
 656         regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 657 err_reg_get:
 658         regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 659         return ret;
 660 }
 661
 662 static int wm8770_remove(struct snd_soc_codec *codec)
 663 {
 664         struct wm8770_priv *wm8770;
 665         int i;
 666
 667         wm8770 = snd_soc_codec_get_drvdata(codec);
 668         wm8770_set_bias_level(codec, SND_SOC_BIAS_OFF);
 669
 670         for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
 671                 regulator_unregister_notifier(wm8770->supplies[i].consumer,
 672                                               &wm8770->disable_nb[i]);
 673         regulator_bulk_free(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 674         return 0;
 675 }
 676
 677 static struct snd_soc_codec_driver soc_codec_dev_wm8770 = {
 678         .probe = wm8770_probe,
 679         .remove = wm8770_remove,
 680         .suspend = wm8770_suspend,
 681         .resume = wm8770_resume,
 682         .set_bias_level = wm8770_set_bias_level,
 683         .reg_cache_size = ARRAY_SIZE(wm8770_reg_defs),
 684         .reg_word_size = sizeof (u16),
 685         .reg_cache_default = wm8770_reg_defs
 686 };
 687
 688 static const struct of_device_id wm8770_of_match[] = {
 689         { .compatible = "wlf,wm8770", },
 690         { }
 691 };
 692 MODULE_DEVICE_TABLE(of, wm8770_of_match);
 693
 694 #if defined(CONFIG_SPI_MASTER)
 695 static int __devinit wm8770_spi_probe(struct spi_device *spi)
 696 {
 697         struct wm8770_priv *wm8770;
 698         int ret;
 699
 700         wm8770 = kzalloc(sizeof(struct wm8770_priv), GFP_KERNEL);
 701         if (!wm8770)
 702                 return -ENOMEM;
 703
 704         wm8770->control_type = SND_SOC_SPI;
 705         spi_set_drvdata(spi, wm8770);
 706
 707         ret = snd_soc_register_codec(&spi->dev,
 708                                      &soc_codec_dev_wm8770, &wm8770_dai, 1);
 709         if (ret < 0)
 710                 kfree(wm8770);
 711         return ret;
 712 }
 713
 714 static int __devexit wm8770_spi_remove(struct spi_device *spi)
 715 {
 716         snd_soc_unregister_codec(&spi->dev);
 717         kfree(spi_get_drvdata(spi));
 718         return 0;
 719 }
 720
 721 static struct spi_driver wm8770_spi_driver = {
 722         .driver = {
 723                 .name = "wm8770",
 724                 .owner = THIS_MODULE,
 725                 .of_match_table = wm8770_of_match,
 726         },
 727         .probe = wm8770_spi_probe,
 728         .remove = __devexit_p(wm8770_spi_remove)
 729 };
 730 #endif
 731
 732 static int __init wm8770_modinit(void)
 733 {
 734         int ret = 0;
 735
 736 #if defined(CONFIG_SPI_MASTER)
 737         ret = spi_register_driver(&wm8770_spi_driver);
 738         if (ret) {
 739                 printk(KERN_ERR "Failed to register wm8770 SPI driver: %d\n",
 740                        ret);
 741         }
 742 #endif
 743         return ret;
 744 }
 745 module_init(wm8770_modinit);
 746
 747 static void __exit wm8770_exit(void)
 748 {
 749 #if defined(CONFIG_SPI_MASTER)
 750         spi_unregister_driver(&wm8770_spi_driver);
 751 #endif
 752 }
 753 module_exit(wm8770_exit);
 754
 755 MODULE_DESCRIPTION("ASoC WM8770 driver");
 756 MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
 757 MODULE_LICENSE("GPL");