sound/soc/codecs/wm8731.c

   1 /*
   2  * wm8731.c  --  WM8731 ALSA SoC Audio driver
   3  *
   4  * Copyright 2005 Openedhand Ltd.
   5  * Copyright 2006-12 Wolfson Microelectronics, plc
   6  *
   7  * Author: Richard Purdie <richard@openedhand.com>
   8  *
   9  * Based on wm8753.c by Liam Girdwood
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/moduleparam.h>
  18 #include <linux/init.h>
  19 #include <linux/delay.h>
  20 #include <linux/pm.h>
  21 #include <linux/i2c.h>
  22 #include <linux/slab.h>
  23 #include <linux/regmap.h>
  24 #include <linux/regulator/consumer.h>
  25 #include <linux/spi/spi.h>
  26 #include <linux/of_device.h>
  27 #include <linux/mutex.h>
  28 #include <linux/clk.h>
  29 #include <sound/core.h>
  30 #include <sound/pcm.h>
  31 #include <sound/pcm_params.h>
  32 #include <sound/soc.h>
  33 #include <sound/initval.h>
  34 #include <sound/tlv.h>
  35
  36 #include "wm8731.h"
  37
  38 #define WM8731_NUM_SUPPLIES 4
  39 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = {
  40         "AVDD",
  41         "HPVDD",
  42         "DCVDD",
  43         "DBVDD",
  44 };
  45
  46 /* codec private data */
  47 struct wm8731_priv {
  48         struct regmap *regmap;
  49         struct clk *mclk;
  50         struct regulator_bulk_data supplies[WM8731_NUM_SUPPLIES];
  51         const struct snd_pcm_hw_constraint_list *constraints;
  52         unsigned int sysclk;
  53         int sysclk_type;
  54         int playback_fs;
  55         bool deemph;
  56
  57         struct mutex lock;
  58 };
  59
  60
  61 /*
  62  * wm8731 register cache
  63  */
  64 static const struct reg_default wm8731_reg_defaults[] = {
  65         { 0, 0x0097 },
  66         { 1, 0x0097 },
  67         { 2, 0x0079 },
  68         { 3, 0x0079 },
  69         { 4, 0x000a },
  70         { 5, 0x0008 },
  71         { 6, 0x009f },
  72         { 7, 0x000a },
  73         { 8, 0x0000 },
  74         { 9, 0x0000 },
  75 };
  76
  77 static bool wm8731_volatile(struct device *dev, unsigned int reg)
  78 {
  79         return reg == WM8731_RESET;
  80 }
  81
  82 #define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0)
  83
  84 static const char *wm8731_input_select[] = {"Line In", "Mic"};
  85
  86 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum,
  87                             WM8731_APANA, 2, wm8731_input_select);
  88
  89 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 };
  90
  91 static int wm8731_set_deemph(struct snd_soc_codec *codec)
  92 {
  93         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
  94         int val, i, best;
  95
  96         /* If we're using deemphasis select the nearest available sample
  97          * rate.
  98          */
  99         if (wm8731->deemph) {
 100                 best = 1;
 101                 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) {
 102                         if (abs(wm8731_deemph[i] - wm8731->playback_fs) <
 103                             abs(wm8731_deemph[best] - wm8731->playback_fs))
 104                                 best = i;
 105                 }
 106
 107                 val = best << 1;
 108         } else {
 109                 best = 0;
 110                 val = 0;
 111         }
 112
 113         dev_dbg(codec->dev, "Set deemphasis %d (%dHz)\n",
 114                 best, wm8731_deemph[best]);
 115
 116         return snd_soc_update_bits(codec, WM8731_APDIGI, 0x6, val);
 117 }
 118
 119 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol,
 120                              struct snd_ctl_elem_value *ucontrol)
 121 {
 122         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 123         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 124
 125         ucontrol->value.integer.value[0] = wm8731->deemph;
 126
 127         return 0;
 128 }
 129
 130 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 131                              struct snd_ctl_elem_value *ucontrol)
 132 {
 133         struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
 134         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 135         unsigned int deemph = ucontrol->value.integer.value[0];
 136         int ret = 0;
 137
 138         if (deemph > 1)
 139                 return -EINVAL;
 140
 141         mutex_lock(&wm8731->lock);
 142         if (wm8731->deemph != deemph) {
 143                 wm8731->deemph = deemph;
 144
 145                 wm8731_set_deemph(codec);
 146
 147                 ret = 1;
 148         }
 149         mutex_unlock(&wm8731->lock);
 150
 151         return ret;
 152 }
 153
 154 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0);
 155 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0);
 156 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
 157 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0);
 158
 159 static const struct snd_kcontrol_new wm8731_snd_controls[] = {
 160
 161 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
 162                  0, 127, 0, out_tlv),
 163 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
 164         7, 1, 0),
 165
 166 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0,
 167                  in_tlv),
 168 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
 169
 170 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv),
 171 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1),
 172
 173 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1,
 174                sidetone_tlv),
 175
 176 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
 177 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
 178
 179 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
 180                     wm8731_get_deemph, wm8731_put_deemph),
 181 };
 182
 183 /* Output Mixer */
 184 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
 185 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
 186 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
 187 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
 188 };
 189
 190 /* Input mux */
 191 static const struct snd_kcontrol_new wm8731_input_mux_controls =
 192 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum);
 193
 194 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
 195 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0),
 196 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0),
 197 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
 198         &wm8731_output_mixer_controls[0],
 199         ARRAY_SIZE(wm8731_output_mixer_controls)),
 200 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
 201 SND_SOC_DAPM_OUTPUT("LOUT"),
 202 SND_SOC_DAPM_OUTPUT("LHPOUT"),
 203 SND_SOC_DAPM_OUTPUT("ROUT"),
 204 SND_SOC_DAPM_OUTPUT("RHPOUT"),
 205 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
 206 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
 207 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
 208 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
 209 SND_SOC_DAPM_INPUT("MICIN"),
 210 SND_SOC_DAPM_INPUT("RLINEIN"),
 211 SND_SOC_DAPM_INPUT("LLINEIN"),
 212 };
 213
 214 static int wm8731_check_osc(struct snd_soc_dapm_widget *source,
 215                             struct snd_soc_dapm_widget *sink)
 216 {
 217         struct snd_soc_codec *codec = snd_soc_dapm_to_codec(source->dapm);
 218         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 219
 220         return wm8731->sysclk_type == WM8731_SYSCLK_XTAL;
 221 }
 222
 223 static const struct snd_soc_dapm_route wm8731_intercon[] = {
 224         {"DAC", NULL, "OSC", wm8731_check_osc},
 225         {"ADC", NULL, "OSC", wm8731_check_osc},
 226         {"DAC", NULL, "ACTIVE"},
 227         {"ADC", NULL, "ACTIVE"},
 228
 229         /* output mixer */
 230         {"Output Mixer", "Line Bypass Switch", "Line Input"},
 231         {"Output Mixer", "HiFi Playback Switch", "DAC"},
 232         {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
 233
 234         /* outputs */
 235         {"RHPOUT", NULL, "Output Mixer"},
 236         {"ROUT", NULL, "Output Mixer"},
 237         {"LHPOUT", NULL, "Output Mixer"},
 238         {"LOUT", NULL, "Output Mixer"},
 239
 240         /* input mux */
 241         {"Input Mux", "Line In", "Line Input"},
 242         {"Input Mux", "Mic", "Mic Bias"},
 243         {"ADC", NULL, "Input Mux"},
 244
 245         /* inputs */
 246         {"Line Input", NULL, "LLINEIN"},
 247         {"Line Input", NULL, "RLINEIN"},
 248         {"Mic Bias", NULL, "MICIN"},
 249 };
 250
 251 struct _coeff_div {
 252         u32 mclk;
 253         u32 rate;
 254         u16 fs;
 255         u8 sr:4;
 256         u8 bosr:1;
 257         u8 usb:1;
 258 };
 259
 260 /* codec mclk clock divider coefficients */
 261 static const struct _coeff_div coeff_div[] = {
 262         /* 48k */
 263         {12288000, 48000, 256, 0x0, 0x0, 0x0},
 264         {18432000, 48000, 384, 0x0, 0x1, 0x0},
 265         {12000000, 48000, 250, 0x0, 0x0, 0x1},
 266
 267         /* 32k */
 268         {12288000, 32000, 384, 0x6, 0x0, 0x0},
 269         {18432000, 32000, 576, 0x6, 0x1, 0x0},
 270         {12000000, 32000, 375, 0x6, 0x0, 0x1},
 271
 272         /* 8k */
 273         {12288000, 8000, 1536, 0x3, 0x0, 0x0},
 274         {18432000, 8000, 2304, 0x3, 0x1, 0x0},
 275         {11289600, 8000, 1408, 0xb, 0x0, 0x0},
 276         {16934400, 8000, 2112, 0xb, 0x1, 0x0},
 277         {12000000, 8000, 1500, 0x3, 0x0, 0x1},
 278
 279         /* 96k */
 280         {12288000, 96000, 128, 0x7, 0x0, 0x0},
 281         {18432000, 96000, 192, 0x7, 0x1, 0x0},
 282         {12000000, 96000, 125, 0x7, 0x0, 0x1},
 283
 284         /* 44.1k */
 285         {11289600, 44100, 256, 0x8, 0x0, 0x0},
 286         {16934400, 44100, 384, 0x8, 0x1, 0x0},
 287         {12000000, 44100, 272, 0x8, 0x1, 0x1},
 288
 289         /* 88.2k */
 290         {11289600, 88200, 128, 0xf, 0x0, 0x0},
 291         {16934400, 88200, 192, 0xf, 0x1, 0x0},
 292         {12000000, 88200, 136, 0xf, 0x1, 0x1},
 293 };
 294
 295 /* rates constraints */
 296 static const unsigned int wm8731_rates_12000000[] = {
 297         8000, 32000, 44100, 48000, 96000, 88200,
 298 };
 299
 300 static const unsigned int wm8731_rates_12288000_18432000[] = {
 301         8000, 32000, 48000, 96000,
 302 };
 303
 304 static const unsigned int wm8731_rates_11289600_16934400[] = {
 305         8000, 44100, 88200,
 306 };
 307
 308 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = {
 309         .list = wm8731_rates_12000000,
 310         .count = ARRAY_SIZE(wm8731_rates_12000000),
 311 };
 312
 313 static const
 314 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = {
 315         .list = wm8731_rates_12288000_18432000,
 316         .count = ARRAY_SIZE(wm8731_rates_12288000_18432000),
 317 };
 318
 319 static const
 320 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = {
 321         .list = wm8731_rates_11289600_16934400,
 322         .count = ARRAY_SIZE(wm8731_rates_11289600_16934400),
 323 };
 324
 325 static inline int get_coeff(int mclk, int rate)
 326 {
 327         int i;
 328
 329         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 330                 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
 331                         return i;
 332         }
 333         return 0;
 334 }
 335
 336 static int wm8731_hw_params(struct snd_pcm_substream *substream,
 337                             struct snd_pcm_hw_params *params,
 338                             struct snd_soc_dai *dai)
 339 {
 340         struct snd_soc_codec *codec = dai->codec;
 341         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 342         u16 iface = snd_soc_read(codec, WM8731_IFACE) & 0xfff3;
 343         int i = get_coeff(wm8731->sysclk, params_rate(params));
 344         u16 srate = (coeff_div[i].sr << 2) |
 345                 (coeff_div[i].bosr << 1) | coeff_div[i].usb;
 346
 347         wm8731->playback_fs = params_rate(params);
 348
 349         snd_soc_write(codec, WM8731_SRATE, srate);
 350
 351         /* bit size */
 352         switch (params_width(params)) {
 353         case 16:
 354                 break;
 355         case 20:
 356                 iface |= 0x0004;
 357                 break;
 358         case 24:
 359                 iface |= 0x0008;
 360                 break;
 361         case 32:
 362                 iface |= 0x000c;
 363                 break;
 364         }
 365
 366         wm8731_set_deemph(codec);
 367
 368         snd_soc_write(codec, WM8731_IFACE, iface);
 369         return 0;
 370 }
 371
 372 static int wm8731_mute(struct snd_soc_dai *dai, int mute)
 373 {
 374         struct snd_soc_codec *codec = dai->codec;
 375         u16 mute_reg = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
 376
 377         if (mute)
 378                 snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
 379         else
 380                 snd_soc_write(codec, WM8731_APDIGI, mute_reg);
 381         return 0;
 382 }
 383
 384 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 385                 int clk_id, unsigned int freq, int dir)
 386 {
 387         struct snd_soc_codec *codec = codec_dai->codec;
 388         struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
 389         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 390
 391         switch (clk_id) {
 392         case WM8731_SYSCLK_XTAL:
 393         case WM8731_SYSCLK_MCLK:
 394                 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq))
 395                         return -EINVAL;
 396                 wm8731->sysclk_type = clk_id;
 397                 break;
 398         default:
 399                 return -EINVAL;
 400         }
 401
 402         switch (freq) {
 403         case 0:
 404                 wm8731->constraints = NULL;
 405                 break;
 406         case 12000000:
 407                 wm8731->constraints = &wm8731_constraints_12000000;
 408                 break;
 409         case 12288000:
 410         case 18432000:
 411                 wm8731->constraints = &wm8731_constraints_12288000_18432000;
 412                 break;
 413         case 16934400:
 414         case 11289600:
 415                 wm8731->constraints = &wm8731_constraints_11289600_16934400;
 416                 break;
 417         default:
 418                 return -EINVAL;
 419         }
 420
 421         wm8731->sysclk = freq;
 422
 423         snd_soc_dapm_sync(dapm);
 424
 425         return 0;
 426 }
 427
 428
 429 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai,
 430                 unsigned int fmt)
 431 {
 432         struct snd_soc_codec *codec = codec_dai->codec;
 433         u16 iface = 0;
 434
 435         /* set master/slave audio interface */
 436         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 437         case SND_SOC_DAIFMT_CBM_CFM:
 438                 iface |= 0x0040;
 439                 break;
 440         case SND_SOC_DAIFMT_CBS_CFS:
 441                 break;
 442         default:
 443                 return -EINVAL;
 444         }
 445
 446         /* interface format */
 447         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 448         case SND_SOC_DAIFMT_I2S:
 449                 iface |= 0x0002;
 450                 break;
 451         case SND_SOC_DAIFMT_RIGHT_J:
 452                 break;
 453         case SND_SOC_DAIFMT_LEFT_J:
 454                 iface |= 0x0001;
 455                 break;
 456         case SND_SOC_DAIFMT_DSP_A:
 457                 iface |= 0x0013;
 458                 break;
 459         case SND_SOC_DAIFMT_DSP_B:
 460                 iface |= 0x0003;
 461                 break;
 462         default:
 463                 return -EINVAL;
 464         }
 465
 466         /* clock inversion */
 467         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 468         case SND_SOC_DAIFMT_NB_NF:
 469                 break;
 470         case SND_SOC_DAIFMT_IB_IF:
 471                 iface |= 0x0090;
 472                 break;
 473         case SND_SOC_DAIFMT_IB_NF:
 474                 iface |= 0x0080;
 475                 break;
 476         case SND_SOC_DAIFMT_NB_IF:
 477                 iface |= 0x0010;
 478                 break;
 479         default:
 480                 return -EINVAL;
 481         }
 482
 483         /* set iface */
 484         snd_soc_write(codec, WM8731_IFACE, iface);
 485         return 0;
 486 }
 487
 488 static int wm8731_set_bias_level(struct snd_soc_codec *codec,
 489                                  enum snd_soc_bias_level level)
 490 {
 491         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(codec);
 492         int ret;
 493         u16 reg;
 494
 495         switch (level) {
 496         case SND_SOC_BIAS_ON:
 497                 if (wm8731->mclk) {
 498                         ret = clk_prepare_enable(wm8731->mclk);
 499                         if (ret)
 500                                 return ret;
 501                 }
 502                 break;
 503         case SND_SOC_BIAS_PREPARE:
 504                 break;
 505         case SND_SOC_BIAS_STANDBY:
 506                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
 507                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 508                                                     wm8731->supplies);
 509                         if (ret != 0)
 510                                 return ret;
 511
 512                         regcache_sync(wm8731->regmap);
 513                 }
 514
 515                 /* Clear PWROFF, gate CLKOUT, everything else as-is */
 516                 reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
 517                 snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
 518                 break;
 519         case SND_SOC_BIAS_OFF:
 520                 if (wm8731->mclk)
 521                         clk_disable_unprepare(wm8731->mclk);
 522                 snd_soc_write(codec, WM8731_PWR, 0xffff);
 523                 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies),
 524                                        wm8731->supplies);
 525                 regcache_mark_dirty(wm8731->regmap);
 526                 break;
 527         }
 528         return 0;
 529 }
 530
 531 static int wm8731_startup(struct snd_pcm_substream *substream,
 532         struct snd_soc_dai *dai)
 533 {
 534         struct wm8731_priv *wm8731 = snd_soc_codec_get_drvdata(dai->codec);
 535
 536         if (wm8731->constraints)
 537                 snd_pcm_hw_constraint_list(substream->runtime, 0,
 538                                            SNDRV_PCM_HW_PARAM_RATE,
 539                                            wm8731->constraints);
 540
 541         return 0;
 542 }
 543
 544 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000
 545
 546 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 547         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 548
 549 static const struct snd_soc_dai_ops wm8731_dai_ops = {
 550         .startup        = wm8731_startup,
 551         .hw_params      = wm8731_hw_params,
 552         .digital_mute   = wm8731_mute,
 553         .set_sysclk     = wm8731_set_dai_sysclk,
 554         .set_fmt        = wm8731_set_dai_fmt,
 555 };
 556
 557 static struct snd_soc_dai_driver wm8731_dai = {
 558         .name = "wm8731-hifi",
 559         .playback = {
 560                 .stream_name = "Playback",
 561                 .channels_min = 1,
 562                 .channels_max = 2,
 563                 .rates = WM8731_RATES,
 564                 .formats = WM8731_FORMATS,},
 565         .capture = {
 566                 .stream_name = "Capture",
 567                 .channels_min = 1,
 568                 .channels_max = 2,
 569                 .rates = WM8731_RATES,
 570                 .formats = WM8731_FORMATS,},
 571         .ops = &wm8731_dai_ops,
 572         .symmetric_rates = 1,
 573 };
 574
 575 static int wm8731_request_supplies(struct device *dev,
 576                 struct wm8731_priv *wm8731)
 577 {
 578         int ret = 0, i;
 579
 580         for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++)
 581                 wm8731->supplies[i].supply = wm8731_supply_names[i];
 582
 583         ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies),
 584                                  wm8731->supplies);
 585         if (ret != 0) {
 586                 dev_err(dev, "Failed to request supplies: %d\n", ret);
 587                 return ret;
 588         }
 589
 590         ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies),
 591                                     wm8731->supplies);
 592         if (ret != 0) {
 593                 dev_err(dev, "Failed to enable supplies: %d\n", ret);
 594                 return ret;
 595         }
 596
 597         return 0;
 598 }
 599
 600 static int wm8731_hw_init(struct device *dev, struct wm8731_priv *wm8731)
 601 {
 602         int ret = 0;
 603
 604         ret = wm8731_reset(wm8731->regmap);
 605         if (ret < 0) {
 606                 dev_err(dev, "Failed to issue reset: %d\n", ret);
 607                 goto err_regulator_enable;
 608         }
 609
 610         /* Clear POWEROFF, keep everything else disabled */
 611         regmap_write(wm8731->regmap, WM8731_PWR, 0x7f);
 612
 613         /* Latch the update bits */
 614         regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0);
 615         regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0);
 616         regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0);
 617         regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0);
 618
 619         /* Disable bypass path by default */
 620         regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0);
 621
 622         regcache_mark_dirty(wm8731->regmap);
 623
 624 err_regulator_enable:
 625         /* Regulators will be enabled by bias management */
 626         regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies);
 627
 628         return ret;
 629 }
 630
 631 static const struct snd_soc_codec_driver soc_codec_dev_wm8731 = {
 632         .set_bias_level = wm8731_set_bias_level,
 633         .suspend_bias_off = true,
 634
 635         .component_driver = {
 636                 .controls               = wm8731_snd_controls,
 637                 .num_controls           = ARRAY_SIZE(wm8731_snd_controls),
 638                 .dapm_widgets           = wm8731_dapm_widgets,
 639                 .num_dapm_widgets       = ARRAY_SIZE(wm8731_dapm_widgets),
 640                 .dapm_routes            = wm8731_intercon,
 641                 .num_dapm_routes        = ARRAY_SIZE(wm8731_intercon),
 642         },
 643 };
 644
 645 static const struct of_device_id wm8731_of_match[] = {
 646         { .compatible = "wlf,wm8731", },
 647         { }
 648 };
 649
 650 MODULE_DEVICE_TABLE(of, wm8731_of_match);
 651
 652 static const struct regmap_config wm8731_regmap = {
 653         .reg_bits = 7,
 654         .val_bits = 9,
 655
 656         .max_register = WM8731_RESET,
 657         .volatile_reg = wm8731_volatile,
 658
 659         .cache_type = REGCACHE_RBTREE,
 660         .reg_defaults = wm8731_reg_defaults,
 661         .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults),
 662 };
 663
 664 #if defined(CONFIG_SPI_MASTER)
 665 static int wm8731_spi_probe(struct spi_device *spi)
 666 {
 667         struct wm8731_priv *wm8731;
 668         int ret;
 669
 670         wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
 671         if (wm8731 == NULL)
 672                 return -ENOMEM;
 673
 674         wm8731->mclk = devm_clk_get(&spi->dev, "mclk");
 675         if (IS_ERR(wm8731->mclk)) {
 676                 ret = PTR_ERR(wm8731->mclk);
 677                 if (ret == -ENOENT) {
 678                         wm8731->mclk = NULL;
 679                         dev_warn(&spi->dev, "Assuming static MCLK\n");
 680                 } else {
 681                         dev_err(&spi->dev, "Failed to get MCLK: %d\n",
 682                                 ret);
 683                         return ret;
 684                 }
 685         }
 686
 687         mutex_init(&wm8731->lock);
 688
 689         spi_set_drvdata(spi, wm8731);
 690
 691         ret = wm8731_request_supplies(&spi->dev, wm8731);
 692         if (ret != 0)
 693                 return ret;
 694
 695         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
 696         if (IS_ERR(wm8731->regmap)) {
 697                 ret = PTR_ERR(wm8731->regmap);
 698                 dev_err(&spi->dev, "Failed to allocate register map: %d\n",
 699                         ret);
 700                 return ret;
 701         }
 702
 703         ret = wm8731_hw_init(&spi->dev, wm8731);
 704         if (ret != 0)
 705                 return ret;
 706
 707         ret = snd_soc_register_codec(&spi->dev,
 708                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 709         if (ret != 0) {
 710                 dev_err(&spi->dev, "Failed to register CODEC: %d\n", ret);
 711                 return ret;
 712         }
 713
 714         return 0;
 715 }
 716
 717 static int wm8731_spi_remove(struct spi_device *spi)
 718 {
 719         snd_soc_unregister_codec(&spi->dev);
 720         return 0;
 721 }
 722
 723 static struct spi_driver wm8731_spi_driver = {
 724         .driver = {
 725                 .name   = "wm8731",
 726                 .of_match_table = wm8731_of_match,
 727         },
 728         .probe          = wm8731_spi_probe,
 729         .remove         = wm8731_spi_remove,
 730 };
 731 #endif /* CONFIG_SPI_MASTER */
 732
 733 #if IS_ENABLED(CONFIG_I2C)
 734 static int wm8731_i2c_probe(struct i2c_client *i2c,
 735                             const struct i2c_device_id *id)
 736 {
 737         struct wm8731_priv *wm8731;
 738         int ret;
 739
 740         wm8731 = devm_kzalloc(&i2c->dev, sizeof(struct wm8731_priv),
 741                               GFP_KERNEL);
 742         if (wm8731 == NULL)
 743                 return -ENOMEM;
 744
 745         wm8731->mclk = devm_clk_get(&i2c->dev, "mclk");
 746         if (IS_ERR(wm8731->mclk)) {
 747                 ret = PTR_ERR(wm8731->mclk);
 748                 if (ret == -ENOENT) {
 749                         wm8731->mclk = NULL;
 750                         dev_warn(&i2c->dev, "Assuming static MCLK\n");
 751                 } else {
 752                         dev_err(&i2c->dev, "Failed to get MCLK: %d\n",
 753                                 ret);
 754                         return ret;
 755                 }
 756         }
 757
 758         mutex_init(&wm8731->lock);
 759
 760         i2c_set_clientdata(i2c, wm8731);
 761
 762         ret = wm8731_request_supplies(&i2c->dev, wm8731);
 763         if (ret != 0)
 764                 return ret;
 765
 766         wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
 767         if (IS_ERR(wm8731->regmap)) {
 768                 ret = PTR_ERR(wm8731->regmap);
 769                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 770                         ret);
 771                 return ret;
 772         }
 773
 774         ret = wm8731_hw_init(&i2c->dev, wm8731);
 775         if (ret != 0)
 776                 return ret;
 777
 778         ret = snd_soc_register_codec(&i2c->dev,
 779                         &soc_codec_dev_wm8731, &wm8731_dai, 1);
 780         if (ret != 0) {
 781                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 782                 return ret;
 783         }
 784
 785         return 0;
 786 }
 787
 788 static int wm8731_i2c_remove(struct i2c_client *client)
 789 {
 790         snd_soc_unregister_codec(&client->dev);
 791         return 0;
 792 }
 793
 794 static const struct i2c_device_id wm8731_i2c_id[] = {
 795         { "wm8731", 0 },
 796         { }
 797 };
 798 MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
 799
 800 static struct i2c_driver wm8731_i2c_driver = {
 801         .driver = {
 802                 .name = "wm8731",
 803                 .of_match_table = wm8731_of_match,
 804         },
 805         .probe =    wm8731_i2c_probe,
 806         .remove =   wm8731_i2c_remove,
 807         .id_table = wm8731_i2c_id,
 808 };
 809 #endif
 810
 811 static int __init wm8731_modinit(void)
 812 {
 813         int ret = 0;
 814 #if IS_ENABLED(CONFIG_I2C)
 815         ret = i2c_add_driver(&wm8731_i2c_driver);
 816         if (ret != 0) {
 817                 printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
 818                        ret);
 819         }
 820 #endif
 821 #if defined(CONFIG_SPI_MASTER)
 822         ret = spi_register_driver(&wm8731_spi_driver);
 823         if (ret != 0) {
 824                 printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
 825                        ret);
 826         }
 827 #endif
 828         return ret;
 829 }
 830 module_init(wm8731_modinit);
 831
 832 static void __exit wm8731_exit(void)
 833 {
 834 #if IS_ENABLED(CONFIG_I2C)
 835         i2c_del_driver(&wm8731_i2c_driver);
 836 #endif
 837 #if defined(CONFIG_SPI_MASTER)
 838         spi_unregister_driver(&wm8731_spi_driver);
 839 #endif
 840 }
 841 module_exit(wm8731_exit);
 842
 843 MODULE_DESCRIPTION("ASoC WM8731 driver");
 844 MODULE_AUTHOR("Richard Purdie");
 845 MODULE_LICENSE("GPL");