linux/sound/soc/codecs/wm8770.c
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   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
  33static const char *wm8770_supply_names[WM8770_NUM_SUPPLIES] = {
  34        "AVDD1",
  35        "AVDD2",
  36        "DVDD"
  37};
  38
  39static 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
  73static 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
  83struct 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
  91static int vout12supply_event(struct snd_soc_dapm_widget *w,
  92        struct snd_kcontrol *kcontrol, int event);
  93static 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) \
 102static 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
 113WM8770_REGULATOR_EVENT(0)
 114WM8770_REGULATOR_EVENT(1)
 115WM8770_REGULATOR_EVENT(2)
 116
 117static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0);
 118static const DECLARE_TLV_DB_SCALE(dac_dig_tlv, -12750, 50, 1);
 119static const DECLARE_TLV_DB_SCALE(dac_alg_tlv, -12700, 100, 1);
 120
 121static 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
 128static 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
 135static 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
 194static const char *ain_text[] = {
 195        "AIN1", "AIN2", "AIN3", "AIN4",
 196        "AIN5", "AIN6", "AIN7", "AIN8"
 197};
 198
 199static SOC_ENUM_DOUBLE_DECL(ain_enum,
 200                            WM8770_ADCMUX, 0, 4, ain_text);
 201
 202static const struct snd_kcontrol_new ain_mux =
 203        SOC_DAPM_ENUM("Capture Mux", ain_enum);
 204
 205static 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
 211static 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
 217static 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
 223static 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
 228static 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
 271static 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
 308static 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
 325static 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
 342static int wm8770_reset(struct snd_soc_codec *codec)
 343{
 344        return snd_soc_write(codec, WM8770_RESET, 0);
 345}
 346
 347static 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
 401static const int mclk_ratios[] = {
 402        128,
 403        192,
 404        256,
 405        384,
 406        512,
 407        768
 408};
 409
 410static 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
 478static 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
 487static 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
 499static 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
 543static 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
 550static 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
 570static 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
 606err_reg_enable:
 607        regulator_bulk_disable(ARRAY_SIZE(wm8770->supplies), wm8770->supplies);
 608        return ret;
 609}
 610
 611static const 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        .component_driver = {
 617                .controls               = wm8770_snd_controls,
 618                .num_controls           = ARRAY_SIZE(wm8770_snd_controls),
 619                .dapm_widgets           = wm8770_dapm_widgets,
 620                .num_dapm_widgets       = ARRAY_SIZE(wm8770_dapm_widgets),
 621                .dapm_routes            = wm8770_intercon,
 622                .num_dapm_routes        = ARRAY_SIZE(wm8770_intercon),
 623        },
 624};
 625
 626static const struct of_device_id wm8770_of_match[] = {
 627        { .compatible = "wlf,wm8770", },
 628        { }
 629};
 630MODULE_DEVICE_TABLE(of, wm8770_of_match);
 631
 632static const struct regmap_config wm8770_regmap = {
 633        .reg_bits = 7,
 634        .val_bits = 9,
 635        .max_register = WM8770_RESET,
 636
 637        .reg_defaults = wm8770_reg_defaults,
 638        .num_reg_defaults = ARRAY_SIZE(wm8770_reg_defaults),
 639        .cache_type = REGCACHE_RBTREE,
 640
 641        .volatile_reg = wm8770_volatile_reg,
 642};
 643
 644static int wm8770_spi_probe(struct spi_device *spi)
 645{
 646        struct wm8770_priv *wm8770;
 647        int ret, i;
 648
 649        wm8770 = devm_kzalloc(&spi->dev, sizeof(struct wm8770_priv),
 650                              GFP_KERNEL);
 651        if (!wm8770)
 652                return -ENOMEM;
 653
 654        for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++)
 655                wm8770->supplies[i].supply = wm8770_supply_names[i];
 656
 657        ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8770->supplies),
 658                                      wm8770->supplies);
 659        if (ret) {
 660                dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
 661                return ret;
 662        }
 663
 664        wm8770->disable_nb[0].notifier_call = wm8770_regulator_event_0;
 665        wm8770->disable_nb[1].notifier_call = wm8770_regulator_event_1;
 666        wm8770->disable_nb[2].notifier_call = wm8770_regulator_event_2;
 667
 668        /* This should really be moved into the regulator core */
 669        for (i = 0; i < ARRAY_SIZE(wm8770->supplies); i++) {
 670                ret = regulator_register_notifier(wm8770->supplies[i].consumer,
 671                                                  &wm8770->disable_nb[i]);
 672                if (ret) {
 673                        dev_err(&spi->dev,
 674                                "Failed to register regulator notifier: %d\n",
 675                                ret);
 676                }
 677        }
 678
 679        wm8770->regmap = devm_regmap_init_spi(spi, &wm8770_regmap);
 680        if (IS_ERR(wm8770->regmap))
 681                return PTR_ERR(wm8770->regmap);
 682
 683        spi_set_drvdata(spi, wm8770);
 684
 685        ret = snd_soc_register_codec(&spi->dev,
 686                                     &soc_codec_dev_wm8770, &wm8770_dai, 1);
 687
 688        return ret;
 689}
 690
 691static int wm8770_spi_remove(struct spi_device *spi)
 692{
 693        struct wm8770_priv *wm8770 = spi_get_drvdata(spi);
 694        int i;
 695
 696        for (i = 0; i < ARRAY_SIZE(wm8770->supplies); ++i)
 697                regulator_unregister_notifier(wm8770->supplies[i].consumer,
 698                                              &wm8770->disable_nb[i]);
 699
 700        snd_soc_unregister_codec(&spi->dev);
 701
 702        return 0;
 703}
 704
 705static struct spi_driver wm8770_spi_driver = {
 706        .driver = {
 707                .name = "wm8770",
 708                .of_match_table = wm8770_of_match,
 709        },
 710        .probe = wm8770_spi_probe,
 711        .remove = wm8770_spi_remove
 712};
 713
 714module_spi_driver(wm8770_spi_driver);
 715
 716MODULE_DESCRIPTION("ASoC WM8770 driver");
 717MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
 718MODULE_LICENSE("GPL");
 719