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_codec *codec = dai->codec;
 333         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 334         int i;
 335         u16 clocking = 0;
 336         u16 af = 0;
 337
 338         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 339                 if (coeff_div[i].rate != params_rate(params))
 340                         continue;
 341
 342                 if (coeff_div[i].mclk == wm8737->mclk)
 343                         break;
 344
 345                 if (coeff_div[i].mclk == wm8737->mclk * 2) {
 346                         clocking |= WM8737_CLKDIV2;
 347                         break;
 348                 }
 349         }
 350
 351         if (i == ARRAY_SIZE(coeff_div)) {
 352                 dev_err(codec->dev, "%dHz MCLK can't support %dHz\n",
 353                         wm8737->mclk, params_rate(params));
 354                 return -EINVAL;
 355         }
 356
 357         clocking |= coeff_div[i].usb | (coeff_div[i].sr << WM8737_SR_SHIFT);
 358
 359         switch (params_format(params)) {
 360         case SNDRV_PCM_FORMAT_S16_LE:
 361                 break;
 362         case SNDRV_PCM_FORMAT_S20_3LE:
 363                 af |= 0x8;
 364                 break;
 365         case SNDRV_PCM_FORMAT_S24_LE:
 366                 af |= 0x10;
 367                 break;
 368         case SNDRV_PCM_FORMAT_S32_LE:
 369                 af |= 0x18;
 370                 break;
 371         default:
 372                 return -EINVAL;
 373         }
 374
 375         snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT, WM8737_WL_MASK, af);
 376         snd_soc_update_bits(codec, WM8737_CLOCKING,
 377                             WM8737_USB_MODE | WM8737_CLKDIV2 | WM8737_SR_MASK,
 378                             clocking);
 379
 380         return 0;
 381 }
 382
 383 static int wm8737_set_dai_sysclk(struct snd_soc_dai *codec_dai,
 384                                  int clk_id, unsigned int freq, int dir)
 385 {
 386         struct snd_soc_codec *codec = codec_dai->codec;
 387         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 388         int i;
 389
 390         for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
 391                 if (freq == coeff_div[i].mclk ||
 392                     freq == coeff_div[i].mclk * 2) {
 393                         wm8737->mclk = freq;
 394                         return 0;
 395                 }
 396         }
 397
 398         dev_err(codec->dev, "MCLK rate %dHz not supported\n", freq);
 399
 400         return -EINVAL;
 401 }
 402
 403
 404 static int wm8737_set_dai_fmt(struct snd_soc_dai *codec_dai,
 405                 unsigned int fmt)
 406 {
 407         struct snd_soc_codec *codec = codec_dai->codec;
 408         u16 af = 0;
 409
 410         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 411         case SND_SOC_DAIFMT_CBM_CFM:
 412                 af |= WM8737_MS;
 413                 break;
 414         case SND_SOC_DAIFMT_CBS_CFS:
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419
 420         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 421         case SND_SOC_DAIFMT_I2S:
 422                 af |= 0x2;
 423                 break;
 424         case SND_SOC_DAIFMT_RIGHT_J:
 425                 break;
 426         case SND_SOC_DAIFMT_LEFT_J:
 427                 af |= 0x1;
 428                 break;
 429         case SND_SOC_DAIFMT_DSP_A:
 430                 af |= 0x3;
 431                 break;
 432         case SND_SOC_DAIFMT_DSP_B:
 433                 af |= 0x13;
 434                 break;
 435         default:
 436                 return -EINVAL;
 437         }
 438
 439         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 440         case SND_SOC_DAIFMT_NB_NF:
 441                 break;
 442         case SND_SOC_DAIFMT_NB_IF:
 443                 af |= WM8737_LRP;
 444                 break;
 445         default:
 446                 return -EINVAL;
 447         }
 448
 449         snd_soc_update_bits(codec, WM8737_AUDIO_FORMAT,
 450                             WM8737_FORMAT_MASK | WM8737_LRP | WM8737_MS, af);
 451
 452         return 0;
 453 }
 454
 455 static int wm8737_set_bias_level(struct snd_soc_codec *codec,
 456                                  enum snd_soc_bias_level level)
 457 {
 458         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 459         int ret;
 460
 461         switch (level) {
 462         case SND_SOC_BIAS_ON:
 463                 break;
 464
 465         case SND_SOC_BIAS_PREPARE:
 466                 /* VMID at 2*75k */
 467                 snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 468                                     WM8737_VMIDSEL_MASK, 0);
 469                 break;
 470
 471         case SND_SOC_BIAS_STANDBY:
 472                 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
 473                         ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
 474                                                     wm8737->supplies);
 475                         if (ret != 0) {
 476                                 dev_err(codec->dev,
 477                                         "Failed to enable supplies: %d\n",
 478                                         ret);
 479                                 return ret;
 480                         }
 481
 482                         snd_soc_cache_sync(codec);
 483
 484                         /* Fast VMID ramp at 2*2.5k */
 485                         snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 486                                             WM8737_VMIDSEL_MASK, 0x4);
 487
 488                         /* Bring VMID up */
 489                         snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
 490                                             WM8737_VMID_MASK |
 491                                             WM8737_VREF_MASK,
 492                                             WM8737_VMID_MASK |
 493                                             WM8737_VREF_MASK);
 494
 495                         msleep(500);
 496                 }
 497
 498                 /* VMID at 2*300k */
 499                 snd_soc_update_bits(codec, WM8737_MISC_BIAS_CONTROL,
 500                                     WM8737_VMIDSEL_MASK, 2);
 501
 502                 break;
 503
 504         case SND_SOC_BIAS_OFF:
 505                 snd_soc_update_bits(codec, WM8737_POWER_MANAGEMENT,
 506                                     WM8737_VMID_MASK | WM8737_VREF_MASK, 0);
 507
 508                 regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies),
 509                                        wm8737->supplies);
 510                 break;
 511         }
 512
 513         codec->dapm.bias_level = level;
 514         return 0;
 515 }
 516
 517 #define WM8737_RATES SNDRV_PCM_RATE_8000_96000
 518
 519 #define WM8737_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 520                         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 521
 522 static const struct snd_soc_dai_ops wm8737_dai_ops = {
 523         .hw_params      = wm8737_hw_params,
 524         .set_sysclk     = wm8737_set_dai_sysclk,
 525         .set_fmt        = wm8737_set_dai_fmt,
 526 };
 527
 528 static struct snd_soc_dai_driver wm8737_dai = {
 529         .name = "wm8737",
 530         .capture = {
 531                 .stream_name = "Capture",
 532                 .channels_min = 2,  /* Mono modes not yet supported */
 533                 .channels_max = 2,
 534                 .rates = WM8737_RATES,
 535                 .formats = WM8737_FORMATS,
 536         },
 537         .ops = &wm8737_dai_ops,
 538 };
 539
 540 #ifdef CONFIG_PM
 541 static int wm8737_suspend(struct snd_soc_codec *codec)
 542 {
 543         wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
 544         return 0;
 545 }
 546
 547 static int wm8737_resume(struct snd_soc_codec *codec)
 548 {
 549         wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 550         return 0;
 551 }
 552 #else
 553 #define wm8737_suspend NULL
 554 #define wm8737_resume NULL
 555 #endif
 556
 557 static int wm8737_probe(struct snd_soc_codec *codec)
 558 {
 559         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 560         int ret, i;
 561
 562         ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8737->control_type);
 563         if (ret != 0) {
 564                 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
 565                 return ret;
 566         }
 567
 568         for (i = 0; i < ARRAY_SIZE(wm8737->supplies); i++)
 569                 wm8737->supplies[i].supply = wm8737_supply_names[i];
 570
 571         ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8737->supplies),
 572                                  wm8737->supplies);
 573         if (ret != 0) {
 574                 dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
 575                 return ret;
 576         }
 577
 578         ret = regulator_bulk_enable(ARRAY_SIZE(wm8737->supplies),
 579                                     wm8737->supplies);
 580         if (ret != 0) {
 581                 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
 582                 goto err_get;
 583         }
 584
 585         ret = wm8737_reset(codec);
 586         if (ret < 0) {
 587                 dev_err(codec->dev, "Failed to issue reset\n");
 588                 goto err_enable;
 589         }
 590
 591         snd_soc_update_bits(codec, WM8737_LEFT_PGA_VOLUME, WM8737_LVU,
 592                             WM8737_LVU);
 593         snd_soc_update_bits(codec, WM8737_RIGHT_PGA_VOLUME, WM8737_RVU,
 594                             WM8737_RVU);
 595
 596         wm8737_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 597
 598         /* Bias level configuration will have done an extra enable */
 599         regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 600
 601         snd_soc_add_codec_controls(codec, wm8737_snd_controls,
 602                              ARRAY_SIZE(wm8737_snd_controls));
 603         wm8737_add_widgets(codec);
 604
 605         return 0;
 606
 607 err_enable:
 608         regulator_bulk_disable(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 609 err_get:
 610         regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 611
 612         return ret;
 613 }
 614
 615 static int wm8737_remove(struct snd_soc_codec *codec)
 616 {
 617         struct wm8737_priv *wm8737 = snd_soc_codec_get_drvdata(codec);
 618
 619         wm8737_set_bias_level(codec, SND_SOC_BIAS_OFF);
 620         regulator_bulk_free(ARRAY_SIZE(wm8737->supplies), wm8737->supplies);
 621         return 0;
 622 }
 623
 624 static struct snd_soc_codec_driver soc_codec_dev_wm8737 = {
 625         .probe          = wm8737_probe,
 626         .remove         = wm8737_remove,
 627         .suspend        = wm8737_suspend,
 628         .resume         = wm8737_resume,
 629         .set_bias_level = wm8737_set_bias_level,
 630
 631         .reg_cache_size = WM8737_REGISTER_COUNT - 1, /* Skip reset */
 632         .reg_word_size  = sizeof(u16),
 633         .reg_cache_default = wm8737_reg,
 634 };
 635
 636 static const struct of_device_id wm8737_of_match[] = {
 637         { .compatible = "wlf,wm8737", },
 638         { }
 639 };
 640
 641 MODULE_DEVICE_TABLE(of, wm8737_of_match);
 642
 643 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 644 static __devinit int wm8737_i2c_probe(struct i2c_client *i2c,
 645                                       const struct i2c_device_id *id)
 646 {
 647         struct wm8737_priv *wm8737;
 648         int ret;
 649
 650         wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
 651         if (wm8737 == NULL)
 652                 return -ENOMEM;
 653
 654         i2c_set_clientdata(i2c, wm8737);
 655         wm8737->control_type = SND_SOC_I2C;
 656
 657         ret =  snd_soc_register_codec(&i2c->dev,
 658                                       &soc_codec_dev_wm8737, &wm8737_dai, 1);
 659         if (ret < 0)
 660                 kfree(wm8737);
 661         return ret;
 662
 663 }
 664
 665 static __devexit int wm8737_i2c_remove(struct i2c_client *client)
 666 {
 667         snd_soc_unregister_codec(&client->dev);
 668         kfree(i2c_get_clientdata(client));
 669         return 0;
 670 }
 671
 672 static const struct i2c_device_id wm8737_i2c_id[] = {
 673         { "wm8737", 0 },
 674         { }
 675 };
 676 MODULE_DEVICE_TABLE(i2c, wm8737_i2c_id);
 677
 678 static struct i2c_driver wm8737_i2c_driver = {
 679         .driver = {
 680                 .name = "wm8737",
 681                 .owner = THIS_MODULE,
 682                 .of_match_table = wm8737_of_match,
 683         },
 684         .probe =    wm8737_i2c_probe,
 685         .remove =   __devexit_p(wm8737_i2c_remove),
 686         .id_table = wm8737_i2c_id,
 687 };
 688 #endif
 689
 690 #if defined(CONFIG_SPI_MASTER)
 691 static int __devinit wm8737_spi_probe(struct spi_device *spi)
 692 {
 693         struct wm8737_priv *wm8737;
 694         int ret;
 695
 696         wm8737 = kzalloc(sizeof(struct wm8737_priv), GFP_KERNEL);
 697         if (wm8737 == NULL)
 698                 return -ENOMEM;
 699
 700         wm8737->control_type = SND_SOC_SPI;
 701         spi_set_drvdata(spi, wm8737);
 702
 703         ret = snd_soc_register_codec(&spi->dev,
 704                                      &soc_codec_dev_wm8737, &wm8737_dai, 1);
 705         if (ret < 0)
 706                 kfree(wm8737);
 707         return ret;
 708 }
 709
 710 static int __devexit wm8737_spi_remove(struct spi_device *spi)
 711 {
 712         snd_soc_unregister_codec(&spi->dev);
 713         kfree(spi_get_drvdata(spi));
 714         return 0;
 715 }
 716
 717 static struct spi_driver wm8737_spi_driver = {
 718         .driver = {
 719                 .name   = "wm8737",
 720                 .owner  = THIS_MODULE,
 721                 .of_match_table = wm8737_of_match,
 722         },
 723         .probe          = wm8737_spi_probe,
 724         .remove         = __devexit_p(wm8737_spi_remove),
 725 };
 726 #endif /* CONFIG_SPI_MASTER */
 727
 728 static int __init wm8737_modinit(void)
 729 {
 730         int ret;
 731 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 732         ret = i2c_add_driver(&wm8737_i2c_driver);
 733         if (ret != 0) {
 734                 printk(KERN_ERR "Failed to register WM8737 I2C driver: %d\n",
 735                        ret);
 736         }
 737 #endif
 738 #if defined(CONFIG_SPI_MASTER)
 739         ret = spi_register_driver(&wm8737_spi_driver);
 740         if (ret != 0) {
 741                 printk(KERN_ERR "Failed to register WM8737 SPI driver: %d\n",
 742                        ret);
 743         }
 744 #endif
 745         return 0;
 746 }
 747 module_init(wm8737_modinit);
 748
 749 static void __exit wm8737_exit(void)
 750 {
 751 #if defined(CONFIG_SPI_MASTER)
 752         spi_unregister_driver(&wm8737_spi_driver);
 753 #endif
 754 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
 755         i2c_del_driver(&wm8737_i2c_driver);
 756 #endif
 757 }
 758 module_exit(wm8737_exit);
 759
 760 MODULE_DESCRIPTION("ASoC WM8737 driver");
 761 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 762 MODULE_LICENSE("GPL");