sound/soc/codecs/wm8737.c

   1 /*
   2  * wm8737.c  --  WM8737 ALSA SoC Audio driver
   3  *
   4  * Copyright 2010 Wolfson Microelectronics plc
   5  *
   6  * Author: Mark Brown <broonie@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/pm.h>
  18 #include <linux/i2c.h>
  19 #include <linux/regulator/consumer.h>
  20 #include <linux/spi/spi.h>
  21 #include <linux/slab.h>
  22 #include <linux/of_device.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/soc-dapm.h>
  28 #include <sound/initval.h>
  29 #include <sound/tlv.h>
  30
  31 #include "wm8737.h"
  32
  33 #define WM8737_NUM_SUPPLIES 4
  34 static const char *wm8737_supply_names[WM8737_NUM_SUPPLIES] = {
  35         "DCVDD",
  36         "DBVDD",
  37         "AVDD",
  38         "MVDD",
  39 };
  40
  41 /* codec private data */
  42 struct wm8737_priv {
  43         enum snd_soc_control_type control_type;
  44         struct regulator_bulk_data supplies[WM8737_NUM_SUPPLIES];
  45         unsigned int mclk;
  46 };
  47
  48 static const u16 wm8737_reg[WM8737_REGISTER_COUNT] = {
  49         0x00C3,     /* R0  - Left PGA volume */
  50         0x00C3,     /* R1  - Right PGA volume */
  51         0x0007,     /* R2  - AUDIO path L */
  52         0x0007,     /* R3  - AUDIO path R */
  53         0x0000,     /* R4  - 3D Enhance */
  54         0x0000,     /* R5  - ADC Control */
  55         0x0000,     /* R6  - Power Management */
  56         0x000A,     /* R7  - Audio Format */
  57         0x0000,     /* R8  - Clocking */
  58         0x000F,     /* R9  - MIC Preamp Control */
  59         0x0003,     /* R10 - Misc Bias Control */
  60         0x0000,     /* R11 - Noise Gate */
  61         0x007C,     /* R12 - ALC1 */
  62         0x0000,     /* R13 - ALC2 */
  63         0x0032,     /* R14 - ALC3 */
  64 };
  65
  66 static int wm8737_reset(struct snd_soc_codec *codec)
  67 {
  68         return snd_soc_write(codec, WM8737_RESET, 0);
  69 }
  70
  71 static const unsigned int micboost_tlv[] = {
  72         TLV_DB_RANGE_HEAD(4),
  73         0, 0, TLV_DB_SCALE_ITEM(1300, 0, 0),
  74         1, 1, TLV_DB_SCALE_ITEM(1800, 0, 0),
  75         2, 2, TLV_DB_SCALE_ITEM(2800, 0, 0),
  76         3, 3, TLV_DB_SCALE_ITEM(3300, 0, 0),
  77 };
  78 static const DECLARE_TLV_DB_SCALE(pga_tlv, -9750, 50, 1);
  79 static const DECLARE_TLV_DB_SCALE(adc_tlv, -600, 600, 0);
  80 static const DECLARE_TLV_DB_SCALE(ng_tlv, -7800, 600, 0);
  81 static const DECLARE_TLV_DB_SCALE(alc_max_tlv, -1200, 600, 0);
  82 static const DECLARE_TLV_DB_SCALE(alc_target_tlv, -1800, 100, 0);
  83
  84 static const char *micbias_enum_text[] = {
  85         "25%",
  86         "50%",
  87         "75%",
  88         "100%",
  89 };
  90
  91 static const struct soc_enum micbias_enum =
  92         SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 0, 4, micbias_enum_text);
  93
  94 static const char *low_cutoff_text[] = {
  95         "Low", "High"
  96 };
  97
  98 static const struct soc_enum low_3d =
  99         SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 6, 2, low_cutoff_text);
 100
 101 static const char *high_cutoff_text[] = {
 102         "High", "Low"
 103 };
 104
 105 static const struct soc_enum high_3d =
 106         SOC_ENUM_SINGLE(WM8737_3D_ENHANCE, 5, 2, high_cutoff_text);
 107
 108 static const char *alc_fn_text[] = {
 109         "Disabled", "Right", "Left", "Stereo"
 110 };
 111
 112 static const struct soc_enum alc_fn =
 113         SOC_ENUM_SINGLE(WM8737_ALC1, 7, 4, alc_fn_text);
 114
 115 static const char *alc_hold_text[] = {
 116         "0", "2.67ms", "5.33ms", "10.66ms", "21.32ms", "42.64ms", "85.28ms",
 117         "170.56ms", "341.12ms", "682.24ms", "1.364s", "2.728s", "5.458s",
 118         "10.916s", "21.832s", "43.691s"
 119 };
 120
 121 static const struct soc_enum alc_hold =
 122         SOC_ENUM_SINGLE(WM8737_ALC2, 0, 16, alc_hold_text);
 123
 124 static const char *alc_atk_text[] = {
 125         "8.4ms", "16.8ms", "33.6ms", "67.2ms", "134.4ms", "268.8ms", "537.6ms",
 126         "1.075s", "2.15s", "4.3s", "8.6s"
 127 };
 128
 129 static const struct soc_enum alc_atk =
 130         SOC_ENUM_SINGLE(WM8737_ALC3, 0, 11, alc_atk_text);
 131
 132 static const char *alc_dcy_text[] = {
 133         "33.6ms", "67.2ms", "134.4ms", "268.8ms", "537.6ms", "1.075s", "2.15s",
 134         "4.3s", "8.6s", "17.2s", "34.41s"
 135 };
 136
 137 static const struct soc_enum alc_dcy =
 138         SOC_ENUM_SINGLE(WM8737_ALC3, 4, 11, alc_dcy_text);
 139
 140 static const struct snd_kcontrol_new wm8737_snd_controls[] = {
 141 SOC_DOUBLE_R_TLV("Mic Boost Volume", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
 142                  6, 3, 0, micboost_tlv),
 143 SOC_DOUBLE_R("Mic Boost Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
 144              4, 1, 0),
 145 SOC_DOUBLE("Mic ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
 146            3, 1, 0),
 147
 148 SOC_DOUBLE_R_TLV("Capture Volume", WM8737_LEFT_PGA_VOLUME,
 149                  WM8737_RIGHT_PGA_VOLUME, 0, 255, 0, pga_tlv),
 150 SOC_DOUBLE("Capture ZC Switch", WM8737_AUDIO_PATH_L, WM8737_AUDIO_PATH_R,
 151            2, 1, 0),
 152
 153 SOC_DOUBLE("INPUT1 DC Bias Switch", WM8737_MISC_BIAS_CONTROL, 0, 1, 1, 0),
 154
 155 SOC_ENUM("Mic PGA Bias", micbias_enum),
 156 SOC_SINGLE("ADC Low Power Switch", WM8737_ADC_CONTROL, 2, 1, 0),
 157 SOC_SINGLE("High Pass Filter Switch", WM8737_ADC_CONTROL, 0, 1, 1),
 158 SOC_DOUBLE("Polarity Invert Switch", WM8737_ADC_CONTROL, 5, 6, 1, 0),
 159
 160 SOC_SINGLE("3D Switch", WM8737_3D_ENHANCE, 0, 1, 0),
 161 SOC_SINGLE("3D Depth", WM8737_3D_ENHANCE, 1, 15, 0),
 162 SOC_ENUM("3D Low Cut-off", low_3d),
 163 SOC_ENUM("3D High Cut-off", low_3d),
 164 SOC_SINGLE_TLV("3D ADC Volume", WM8737_3D_ENHANCE, 7, 1, 1, adc_tlv),
 165
 166 SOC_SINGLE("Noise Gate Switch", WM8737_NOISE_GATE, 0, 1, 0),
 167 SOC_SINGLE_TLV("Noise Gate Threshold Volume", WM8737_NOISE_GATE, 2, 7, 0,
 168                ng_tlv),
 169
 170 SOC_ENUM("ALC", alc_fn),
 171 SOC_SINGLE_TLV("ALC Max Gain Volume", WM8737_ALC1, 4, 7, 0, alc_max_tlv),
 172 SOC_SINGLE_TLV("ALC Target Volume", WM8737_ALC1, 0, 15, 0, alc_target_tlv),
 173 SOC_ENUM("ALC Hold Time", alc_hold),
 174 SOC_SINGLE("ALC ZC Switch", WM8737_ALC2, 4, 1, 0),
 175 SOC_ENUM("ALC Attack Time", alc_atk),
 176 SOC_ENUM("ALC Decay Time", alc_dcy),
 177 };
 178
 179 static const char *linsel_text[] = {
 180         "LINPUT1", "LINPUT2", "LINPUT3", "LINPUT1 DC",
 181 };
 182
 183 static const struct soc_enum linsel_enum =
 184         SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_L, 7, 4, linsel_text);
 185
 186 static const struct snd_kcontrol_new linsel_mux =
 187         SOC_DAPM_ENUM("LINSEL", linsel_enum);
 188
 189
 190 static const char *rinsel_text[] = {
 191         "RINPUT1", "RINPUT2", "RINPUT3", "RINPUT1 DC",
 192 };
 193
 194 static const struct soc_enum rinsel_enum =
 195         SOC_ENUM_SINGLE(WM8737_AUDIO_PATH_R, 7, 4, rinsel_text);
 196
 197 static const struct snd_kcontrol_new rinsel_mux =
 198         SOC_DAPM_ENUM("RINSEL", rinsel_enum);
 199
 200 static const char *bypass_text[] = {
 201         "Direct", "Preamp"
 202 };
 203
 204 static const struct soc_enum lbypass_enum =
 205         SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 2, 2, bypass_text);
 206
 207 static const struct snd_kcontrol_new lbypass_mux =
 208         SOC_DAPM_ENUM("Left Bypass", lbypass_enum);
 209
 210
 211 static const struct soc_enum rbypass_enum =
 212         SOC_ENUM_SINGLE(WM8737_MIC_PREAMP_CONTROL, 3, 2, bypass_text);
 213
 214 static const struct snd_kcontrol_new rbypass_mux =
 215         SOC_DAPM_ENUM("Left Bypass", rbypass_enum);
 216
 217 static const struct snd_soc_dapm_widget wm8737_dapm_widgets[] = {
 218 SND_SOC_DAPM_INPUT("LINPUT1"),
 219 SND_SOC_DAPM_INPUT("LINPUT2"),
 220 SND_SOC_DAPM_INPUT("LINPUT3"),
 221 SND_SOC_DAPM_INPUT("RINPUT1"),
 222 SND_SOC_DAPM_INPUT("RINPUT2"),
 223 SND_SOC_DAPM_INPUT("RINPUT3"),
 224 SND_SOC_DAPM_INPUT("LACIN"),
 225 SND_SOC_DAPM_INPUT("RACIN"),
 226
 227 SND_SOC_DAPM_MUX("LINSEL", SND_SOC_NOPM, 0, 0, &linsel_mux),
 228 SND_SOC_DAPM_MUX("RINSEL", SND_SOC_NOPM, 0, 0, &rinsel_mux),
 229
 230 SND_SOC_DAPM_MUX("Left Preamp Mux", SND_SOC_NOPM, 0, 0, &lbypass_mux),
 231 SND_SOC_DAPM_MUX("Right Preamp Mux", SND_SOC_NOPM, 0, 0, &rbypass_mux),
 232
 233 SND_SOC_DAPM_PGA("PGAL", WM8737_POWER_MANAGEMENT, 5, 0, NULL, 0),
 234 SND_SOC_DAPM_PGA("PGAR", WM8737_POWER_MANAGEMENT, 4, 0, NULL, 0),
 235
 236 SND_SOC_DAPM_DAC("ADCL", NULL, WM8737_POWER_MANAGEMENT, 3, 0),
 237 SND_SOC_DAPM_DAC("ADCR", NULL, WM8737_POWER_MANAGEMENT, 2, 0),
 238
 239 SND_SOC_DAPM_AIF_OUT("AIF", "Capture", 0, WM8737_POWER_MANAGEMENT, 6, 0),
 240 };
 241
 242 static const struct snd_soc_dapm_route intercon[] = {
 243         { "LINSEL", "LINPUT1", "LINPUT1" },
 244         { "LINSEL", "LINPUT2", "LINPUT2" },
 245         { "LINSEL", "LINPUT3", "LINPUT3" },
 246         { "LINSEL", "LINPUT1 DC", "LINPUT1" },
 247
 248         { "RINSEL", "RINPUT1", "RINPUT1" },
 249         { "RINSEL", "RINPUT2", "RINPUT2" },
 250         { "RINSEL", "RINPUT3", "RINPUT3" },
 251         { "RINSEL", "RINPUT1 DC", "RINPUT1" },
 252
 253         { "Left Preamp Mux", "Preamp", "LINSEL" },
 254         { "Left Preamp Mux", "Direct", "LACIN" },
 255
 256         { "Right Preamp Mux", "Preamp", "RINSEL" },
 257         { "Right Preamp Mux", "Direct", "RACIN" },
 258
 259         { "PGAL", NULL, "Left Preamp Mux" },
 260         { "PGAR", NULL, "Right Preamp Mux" },
 261
 262         { "ADCL", NULL, "PGAL" },
 263         { "ADCR", NULL, "PGAR" },
 264
 265         { "AIF", NULL, "ADCL" },
 266         { "AIF", NULL, "ADCR" },
 267 };
 268
 269 static int wm8737_add_widgets(struct snd_soc_codec *codec)
 270 {
 271         struct snd_soc_dapm_context *dapm = &codec->dapm;
 272
 273         snd_soc_dapm_new_controls(dapm, wm8737_dapm_widgets,
 274                                   ARRAY_SIZE(wm8737_dapm_widgets));
 275         snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
 276
 277         return 0;
 278 }
 279
 280 /* codec mclk clock divider coefficients */
 281 static const struct {
 282         u32 mclk;
 283         u32 rate;
 284         u8 usb;
 285         u8 sr;
 286 } coeff_div[] = {
 287         { 12288000,  8000, 0,  0x4 },
 288         { 12288000, 12000, 0,  0x8 },
 289         { 12288000, 16000, 0,  0xa },
 290         { 12288000, 24000, 0, 0x1c },
 291         { 12288000, 32000, 0,  0xc },
 292         { 12288000, 48000, 0,    0 },
 293         { 12288000, 96000, 0,  0xe },
 294
 295         { 11289600,  8000, 0, 0x14 },
 296         { 11289600, 11025, 0, 0x18 },
 297         { 11289600, 22050, 0, 0x1a },
 298         { 11289600, 44100, 0, 0x10 },
 299         { 11289600, 88200, 0, 0x1e },
 300
 301         { 18432000,  8000, 0,  0x5 },
 302         { 18432000, 12000, 0,  0x9 },
 303         { 18432000, 16000, 0,  0xb },
 304         { 18432000, 24000, 0, 0x1b },
 305         { 18432000, 32000, 0,  0xd },
 306         { 18432000, 48000, 0,  0x1 },
 307         { 18432000, 96000, 0, 0x1f },
 308
 309         { 16934400,  8000, 0, 0x15 },
 310         { 16934400, 11025, 0, 0x19 },
 311         { 16934400, 22050, 0, 0x1b },
 312         { 16934400, 44100, 0, 0x11 },
 313         { 16934400, 88200, 0, 0x1f },
 314
 315         { 12000000,  8000, 1,  0x4 },
 316         { 12000000, 11025, 1, 0x19 },
 317         { 12000000, 12000, 1,  0x8 },
 318         { 12000000, 16000, 1,  0xa },
 319         { 12000000, 22050, 1, 0x1b },
 320         { 12000000, 24000, 1, 0x1c },
 321         { 12000000, 32000, 1,  0xc },
 322         { 12000000, 44100, 1, 0x11 },
 323         { 12000000, 48000, 1,  0x0 },
 324         { 12000000, 88200, 1, 0x1f },
 325         { 12000000, 96000, 1,  0xe },
 326 };
 327
 328 static int wm8737_hw_params(struct snd_pcm_substream *substream,
 329                             struct snd_pcm_hw_params *params,
 330                             struct snd_soc_dai *dai)
 331 {
 332         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 333         struct snd_soc_codec *codec = rtd->codec;
 334         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 335         int i;
 336         u16 clocking = 0;
 337         u16 af = 0;
 338
 339         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 340                 if (coeff_div[i].rate != params_rate(params))
 341                         continue;
 342
 343                 if (coeff_div[i].mclk == wm8737->mclk)
 344                         break;
 345
 346                 if (coeff_div[i].mclk == wm8737->mclk * 2) {
 347                         clocking |= WM8737_CLKDIV2;
 348                         break;
 349                 }
 350         }
 351
 352         if (i == ARRAY_SIZE(coeff_div)) {
 353                 dev_err(codec->dev, "%dHz MCLK can't support %dHz\n",
 354                         wm8737->mclk, params_rate(params));
 355                 return -EINVAL;
 356         }
 357
 358         clocking |= coeff_div[i].usb | (coeff_div[i].sr << WM8737_SR_SHIFT);
 359
 360         switch (params_format(params)) {
 361         case SNDRV_PCM_FORMAT_S16_LE:
 362                 break;
 363         case SNDRV_PCM_FORMAT_S20_3LE:
 364                 af |= 0x8;
 365                 break;
 366         case SNDRV_PCM_FORMAT_S24_LE:
 367                 af |= 0x10;
 368                 break;
 369         case SNDRV_PCM_FORMAT_S32_LE:
 370                 af |= 0x18;
 371                 break;
 372         default:
 373                 return -EINVAL;
 374         }
 375
 376         snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT, WM8737_WL_MASK, af);
 377         snd_soc_update_bits(codec, WM8737_CLOCKING,
 378                             WM8737_USB_MODE | WM8737_CLKDIV2 | WM8737_SR_MASK,
 379                             clocking);
 380
 381         return 0;
 382 }
 383
 384 static int wm8737_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 wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 389         int i;
 390
 391         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 392                 if (freq == coeff_div[i].mclk ||
 393                     freq == coeff_div[i].mclk * 2) {
 394                         wm8737->mclk = freq;
 395                         return 0;
 396                 }
 397         }
 398
 399         dev_err(codec->dev, "MCLK rate %dHz not supported\n", freq);
 400
 401         return -EINVAL;
 402 }
 403
 404
 405 static int wm8737_set_dai_fmt(struct snd_soc_dai *codec_dai,
 406                 unsigned int fmt)
 407 {
 408         struct snd_soc_codec *codec = codec_dai->codec;
 409         u16 af = 0;
 410
 411         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 412         case SND_SOC_DAIFMT_CBM_CFM:
 413                 af |= WM8737_MS;
 414                 break;
 415         case SND_SOC_DAIFMT_CBS_CFS:
 416                 break;
 417         default:
 418                 return -EINVAL;
 419         }
 420
 421         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 422         case SND_SOC_DAIFMT_I2S:
 423                 af |= 0x2;
 424                 break;
 425         case SND_SOC_DAIFMT_RIGHT_J:
 426                 break;
 427         case SND_SOC_DAIFMT_LEFT_J:
 428                 af |= 0x1;
 429                 break;
 430         case SND_SOC_DAIFMT_DSP_A:
 431                 af |= 0x3;
 432                 break;
 433         case SND_SOC_DAIFMT_DSP_B:
 434                 af |= 0x13;
 435                 break;
 436         default:
 437                 return -EINVAL;
 438         }
 439
 440         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 441         case SND_SOC_DAIFMT_NB_NF:
 442                 break;
 443         case SND_SOC_DAIFMT_NB_IF:
 444                 af |= WM8737_LRP;
 445                 break;
 446         default:
 447                 return -EINVAL;
 448         }
 449
 450         snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT,
 451                             WM8737_FORMAT_MASK | WM8737_LRP | WM8737_MS, af);
 452
 453         return 0;
 454 }
 455
 456 static int wm8737_set_bias_level(struct snd_soc_codec *codec,
 457                                  enum snd_soc_bias_level level)
 458 {
 459         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 460         int ret;
 461
 462         switch (level) {
 463         case SND_SOC_BIAS_ON:
 464                 break;
 465
 466         case SND_SOC_BIAS_PREPARE:
 467                 /* VMID at 2*75k */
 468                 snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 469                                     WM8737_VMIDSEL_MASK, 0);
 470                 break;
 471
 472         case SND_SOC_BIAS_STANDBY:
 473                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 474                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
 475                                                     wm8737->supplies);
 476                         if (ret != 0) {
 477                                 dev_err(codec->dev,
 478                                         "Failed to enable supplies: %d\n",
 479                                         ret);
 480                                 return ret;
 481                         }
 482
 483                         snd_soc_cache_sync(codec);
 484
 485                         /* Fast VMID ramp at 2*2.5k */
 486                         snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 487                                             WM8737_VMIDSEL_MASK, 0x4);
 488
 489                         /* Bring VMID up */
 490                         snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
 491                                             WM8737_VMID_MASK |
 492                                             WM8737_VREF_MASK,
 493                                             WM8737_VMID_MASK |
 494                                             WM8737_VREF_MASK);
 495
 496                         msleep(500);
 497                 }
 498
 499                 /* VMID at 2*300k */
 500                 snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 501                                     WM8737_VMIDSEL_MASK, 2);
 502
 503                 break;
 504
 505         case SND_SOC_BIAS_OFF:
 506                 snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
 507                                     WM8737_VMID_MASK | WM8737_VREF_MASK, 0);
 508
 509                 regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies),
 510                                        wm8737->supplies);
 511                 break;
 512         }
 513
 514         codec->dapm.bias_level = level;
 515         return 0;
 516 }
 517
 518 #define WM8737_RATES SNDRV_PCM_RATE_8000_96000
 519
 520 #define WM8737_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 521                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 522
 523 static const struct snd_soc_dai_ops wm8737_dai_ops = {
 524         .hw_params      = wm8737_hw_params,
 525         .set_sysclk     = wm8737_set_dai_sysclk,
 526         .set_fmt        = wm8737_set_dai_fmt,
 527 };
 528
 529 static struct snd_soc_dai_driver wm8737_dai = {
 530         .name = "wm8737",
 531         .capture = {
 532                 .stream_name = "Capture",
 533                 .channels_min = 2,  /* Mono modes not yet supported */
 534                 .channels_max = 2,
 535                 .rates = WM8737_RATES,
 536                 .formats = WM8737_FORMATS,
 537         },
 538         .ops = &wm8737_dai_ops,
 539 };
 540
 541 #ifdef CONFIG_PM
 542 static int wm8737_suspend(struct snd_soc_codec *codec)
 543 {
 544         wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
 545         return 0;
 546 }
 547
 548 static int wm8737_resume(struct snd_soc_codec *codec)
 549 {
 550         wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 551         return 0;
 552 }
 553 #else
 554 #define wm8737_suspend NULL
 555 #define wm8737_resume NULL
 556 #endif
 557
 558 static int wm8737_probe(struct snd_soc_codec *codec)
 559 {
 560         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 561         int ret, i;
 562
 563         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8737->control_type);
 564         if (ret != 0) {
 565                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 566                 return ret;
 567         }
 568
 569         for (i = 0; i < ARRAY_SIZE(wm8737->supplies); i++)
 570                 wm8737->supplies[i].supply = wm8737_supply_names[i];
 571
 572         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8737->supplies),
 573                                  wm8737->supplies);
 574         if (ret != 0) {
 575                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 576                 return ret;
 577         }
 578
 579         ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
 580                                     wm8737->supplies);
 581         if (ret != 0) {
 582                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 583                 goto err_get;
 584         }
 585
 586         ret = wm8737_reset(codec);
 587         if (ret < 0) {
 588                 dev_err(codec->dev, "Failed to issue reset\n");
 589                 goto err_enable;
 590         }
 591
 592         snd_soc_update_bits(codec, WM8737_LEFT_PGA_VOLUME, WM8737_LVU,
 593                             WM8737_LVU);
 594         snd_soc_update_bits(codec, WM8737_RIGHT_PGA_VOLUME, WM8737_RVU,
 595                             WM8737_RVU);
 596
 597         wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 598
 599         /* Bias level configuration will have done an extra enable */
 600         regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 601
 602         snd_soc_add_codec_controls(codec, wm8737_snd_controls,
 603                              ARRAY_SIZE(wm8737_snd_controls));
 604         wm8737_add_widgets(codec);
 605
 606         return 0;
 607
 608 err_enable:
 609         regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 610 err_get:
 611         regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 612
 613         return ret;
 614 }
 615
 616 static int wm8737_remove(struct snd_soc_codec *codec)
 617 {
 618         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 619
 620         wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
 621         regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 622         return 0;
 623 }
 624
 625 static struct snd_soc_codec_driver soc_codec_dev_wm8737 = {
 626         .probe          = wm8737_probe,
 627         .remove         = wm8737_remove,
 628         .suspend        = wm8737_suspend,
 629         .resume         = wm8737_resume,
 630         .set_bias_level = wm8737_set_bias_level,
 631
 632         .reg_cache_size = WM8737_REGISTER_COUNT - 1, /* Skip reset */
 633         .reg_word_size  = sizeof(u16),
 634         .reg_cache_default = wm8737_reg,
 635 };
 636
 637 static const struct of_device_id wm8737_of_match[] = {
 638         { .compatible = "wlf,wm8737", },
 639         { }
 640 };
 641
 642 MODULE_DEVICE_TABLE(of, wm8737_of_match);
 643
 644 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 645 static __devinit int wm8737_i2c_probe(struct i2c_client *i2c,
 646                                       const struct i2c_device_id *id)
 647 {
 648         struct wm8737_priv *wm8737;
 649         int ret;
 650
 651         wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
 652         if (wm8737 == NULL)
 653                 return -ENOMEM;
 654
 655         i2c_set_clientdata(i2c, wm8737);
 656         wm8737->control_type = SND_SOC_I2C;
 657
 658         ret =  snd_soc_register_codec(&i2c->dev,
 659                                       &soc_codec_dev_wm8737, &wm8737_dai, 1);
 660         if (ret < 0)
 661                 kfree(wm8737);
 662         return ret;
 663
 664 }
 665
 666 static __devexit int wm8737_i2c_remove(struct i2c_client *client)
 667 {
 668         snd_soc_unregister_codec(&client->dev);
 669         kfree(i2c_get_clientdata(client));
 670         return 0;
 671 }
 672
 673 static const struct i2c_device_id wm8737_i2c_id[] = {
 674         { "wm8737", 0 },
 675         { }
 676 };
 677 MODULE_DEVICE_TABLE(i2c, wm8737_i2c_id);
 678
 679 static struct i2c_driver wm8737_i2c_driver = {
 680         .driver = {
 681                 .name = "wm8737",
 682                 .owner = THIS_MODULE,
 683                 .of_match_table = wm8737_of_match,
 684         },
 685         .probe =    wm8737_i2c_probe,
 686         .remove =   __devexit_p(wm8737_i2c_remove),
 687         .id_table = wm8737_i2c_id,
 688 };
 689 #endif
 690
 691 #if defined(CONFIG_SPI_MASTER)
 692 static int __devinit wm8737_spi_probe(struct spi_device *spi)
 693 {
 694         struct wm8737_priv *wm8737;
 695         int ret;
 696
 697         wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
 698         if (wm8737 == NULL)
 699                 return -ENOMEM;
 700
 701         wm8737->control_type = SND_SOC_SPI;
 702         spi_set_drvdata(spi, wm8737);
 703
 704         ret = snd_soc_register_codec(&spi->dev,
 705                                      &soc_codec_dev_wm8737, &wm8737_dai, 1);
 706         if (ret < 0)
 707                 kfree(wm8737);
 708         return ret;
 709 }
 710
 711 static int __devexit wm8737_spi_remove(struct spi_device *spi)
 712 {
 713         snd_soc_unregister_codec(&spi->dev);
 714         kfree(spi_get_drvdata(spi));
 715         return 0;
 716 }
 717
 718 static struct spi_driver wm8737_spi_driver = {
 719         .driver = {
 720                 .name   = "wm8737",
 721                 .owner  = THIS_MODULE,
 722                 .of_match_table = wm8737_of_match,
 723         },
 724         .probe          = wm8737_spi_probe,
 725         .remove         = __devexit_p(wm8737_spi_remove),
 726 };
 727 #endif /* CONFIG_SPI_MASTER */
 728
 729 static int __init wm8737_modinit(void)
 730 {
 731         int ret;
 732 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 733         ret = i2c_add_driver(&wm8737_i2c_driver);
 734         if (ret != 0) {
 735                 printk(KERN_ERR "Failed to register WM8737 I2C driver: %d\n",
 736                        ret);
 737         }
 738 #endif
 739 #if defined(CONFIG_SPI_MASTER)
 740         ret = spi_register_driver(&wm8737_spi_driver);
 741         if (ret != 0) {
 742                 printk(KERN_ERR "Failed to register WM8737 SPI driver: %d\n",
 743                        ret);
 744         }
 745 #endif
 746         return 0;
 747 }
 748 module_init(wm8737_modinit);
 749
 750 static void __exit wm8737_exit(void)
 751 {
 752 #if defined(CONFIG_SPI_MASTER)
 753         spi_unregister_driver(&wm8737_spi_driver);
 754 #endif
 755 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 756         i2c_del_driver(&wm8737_i2c_driver);
 757 #endif
 758 }
 759 module_exit(wm8737_exit);
 760
 761 MODULE_DESCRIPTION("ASoC WM8737 driver");
 762 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 763 MODULE_LICENSE("GPL");