sound/soc/codecs/wm2000.c

   1 /*
   2  * wm2000.c  --  WM2000 ALSA Soc Audio driver
   3  *
   4  * Copyright 2008-2011 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  * The download image for the WM2000 will be requested as
  13  * 'wm2000_anc.bin' by default (overridable via platform data) at
  14  * runtime and is expected to be in flat binary format.  This is
  15  * generated by Wolfson configuration tools and includes
  16  * system-specific callibration information.  If supplied as a
  17  * sequence of ASCII-encoded hexidecimal bytes this can be converted
  18  * into a flat binary with a command such as this on the command line:
  19  *
  20  * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
  21  *                 < file  > wm2000_anc.bin
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/firmware.h>
  29 #include <linux/delay.h>
  30 #include <linux/pm.h>
  31 #include <linux/i2c.h>
  32 #include <linux/regmap.h>
  33 #include <linux/debugfs.h>
  34 #include <linux/slab.h>
  35 #include <sound/core.h>
  36 #include <sound/pcm.h>
  37 #include <sound/pcm_params.h>
  38 #include <sound/soc.h>
  39 #include <sound/initval.h>
  40 #include <sound/tlv.h>
  41
  42 #include <sound/wm2000.h>
  43
  44 #include "wm2000.h"
  45
  46 enum wm2000_anc_mode {
  47         ANC_ACTIVE = 0,
  48         ANC_BYPASS = 1,
  49         ANC_STANDBY = 2,
  50         ANC_OFF = 3,
  51 };
  52
  53 struct wm2000_priv {
  54         struct i2c_client *i2c;
  55         struct regmap *regmap;
  56
  57         enum wm2000_anc_mode anc_mode;
  58
  59         unsigned int anc_active:1;
  60         unsigned int anc_eng_ena:1;
  61         unsigned int spk_ena:1;
  62
  63         unsigned int mclk_div:1;
  64         unsigned int speech_clarity:1;
  65
  66         int anc_download_size;
  67         char *anc_download;
  68 };
  69
  70 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
  71                         unsigned int value)
  72 {
  73         struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
  74         return regmap_write(wm2000->regmap, reg, value);
  75 }
  76
  77 static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
  78 {
  79         struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
  80         unsigned int val;
  81         int ret;
  82
  83         ret = regmap_read(wm2000->regmap, r, &val);
  84         if (ret < 0)
  85                 return -1;
  86
  87         return val;
  88 }
  89
  90 static void wm2000_reset(struct wm2000_priv *wm2000)
  91 {
  92         struct i2c_client *i2c = wm2000->i2c;
  93
  94         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
  95         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
  96         wm2000_write(i2c, WM2000_REG_ID1, 0);
  97
  98         wm2000->anc_mode = ANC_OFF;
  99 }
 100
 101 static int wm2000_poll_bit(struct i2c_client *i2c,
 102                            unsigned int reg, u8 mask)
 103 {
 104         int timeout = 4000;
 105         int val;
 106
 107         val = wm2000_read(i2c, reg);
 108
 109         while (!(val & mask) && --timeout) {
 110                 msleep(1);
 111                 val = wm2000_read(i2c, reg);
 112         }
 113
 114         if (timeout == 0)
 115                 return 0;
 116         else
 117                 return 1;
 118 }
 119
 120 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
 121 {
 122         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 123         int ret;
 124
 125         BUG_ON(wm2000->anc_mode != ANC_OFF);
 126
 127         dev_dbg(&i2c->dev, "Beginning power up\n");
 128
 129         if (!wm2000->mclk_div) {
 130                 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
 131                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 132                              WM2000_MCLK_DIV2_ENA_CLR);
 133         } else {
 134                 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
 135                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 136                              WM2000_MCLK_DIV2_ENA_SET);
 137         }
 138
 139         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 140         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
 141
 142         /* Wait for ANC engine to become ready */
 143         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 144                              WM2000_ANC_ENG_IDLE)) {
 145                 dev_err(&i2c->dev, "ANC engine failed to reset\n");
 146                 return -ETIMEDOUT;
 147         }
 148
 149         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 150                              WM2000_STATUS_BOOT_COMPLETE)) {
 151                 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
 152                 return -ETIMEDOUT;
 153         }
 154
 155         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 156
 157         /* Open code download of the data since it is the only bulk
 158          * write we do. */
 159         dev_dbg(&i2c->dev, "Downloading %d bytes\n",
 160                 wm2000->anc_download_size - 2);
 161
 162         ret = i2c_master_send(i2c, wm2000->anc_download,
 163                               wm2000->anc_download_size);
 164         if (ret < 0) {
 165                 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
 166                 return ret;
 167         }
 168         if (ret != wm2000->anc_download_size) {
 169                 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
 170                         ret, wm2000->anc_download_size);
 171                 return -EIO;
 172         }
 173
 174         dev_dbg(&i2c->dev, "Download complete\n");
 175
 176         if (analogue) {
 177                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
 178
 179                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 180                              WM2000_MODE_ANA_SEQ_INCLUDE |
 181                              WM2000_MODE_MOUSE_ENABLE |
 182                              WM2000_MODE_THERMAL_ENABLE);
 183         } else {
 184                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 185                              WM2000_MODE_MOUSE_ENABLE |
 186                              WM2000_MODE_THERMAL_ENABLE);
 187         }
 188
 189         ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
 190         if (wm2000->speech_clarity)
 191                 ret &= ~WM2000_SPEECH_CLARITY;
 192         else
 193                 ret |= WM2000_SPEECH_CLARITY;
 194         wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
 195
 196         wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
 197         wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
 198
 199         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 200
 201         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 202                              WM2000_STATUS_MOUSE_ACTIVE)) {
 203                 dev_err(&i2c->dev, "Timed out waiting for device\n");
 204                 return -ETIMEDOUT;
 205         }
 206
 207         dev_dbg(&i2c->dev, "ANC active\n");
 208         if (analogue)
 209                 dev_dbg(&i2c->dev, "Analogue active\n");
 210         wm2000->anc_mode = ANC_ACTIVE;
 211
 212         return 0;
 213 }
 214
 215 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
 216 {
 217         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 218
 219         if (analogue) {
 220                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
 221                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 222                              WM2000_MODE_ANA_SEQ_INCLUDE |
 223                              WM2000_MODE_POWER_DOWN);
 224         } else {
 225                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 226                              WM2000_MODE_POWER_DOWN);
 227         }
 228
 229         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 230                              WM2000_STATUS_POWER_DOWN_COMPLETE)) {
 231                 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
 232                 return -ETIMEDOUT;
 233         }
 234
 235         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 236                              WM2000_ANC_ENG_IDLE)) {
 237                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 238                 return -ETIMEDOUT;
 239         }
 240
 241         dev_dbg(&i2c->dev, "powered off\n");
 242         wm2000->anc_mode = ANC_OFF;
 243
 244         return 0;
 245 }
 246
 247 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
 248 {
 249         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 250
 251         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 252
 253         if (analogue) {
 254                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 255                              WM2000_MODE_ANA_SEQ_INCLUDE |
 256                              WM2000_MODE_THERMAL_ENABLE |
 257                              WM2000_MODE_BYPASS_ENTRY);
 258         } else {
 259                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 260                              WM2000_MODE_THERMAL_ENABLE |
 261                              WM2000_MODE_BYPASS_ENTRY);
 262         }
 263
 264         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 265                              WM2000_STATUS_ANC_DISABLED)) {
 266                 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
 267                 return -ETIMEDOUT;
 268         }
 269
 270         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 271                              WM2000_ANC_ENG_IDLE)) {
 272                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 273                 return -ETIMEDOUT;
 274         }
 275
 276         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 277         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 278
 279         wm2000->anc_mode = ANC_BYPASS;
 280         dev_dbg(&i2c->dev, "bypass enabled\n");
 281
 282         return 0;
 283 }
 284
 285 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
 286 {
 287         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 288
 289         BUG_ON(wm2000->anc_mode != ANC_BYPASS);
 290
 291         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 292
 293         if (analogue) {
 294                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 295                              WM2000_MODE_ANA_SEQ_INCLUDE |
 296                              WM2000_MODE_MOUSE_ENABLE |
 297                              WM2000_MODE_THERMAL_ENABLE);
 298         } else {
 299                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 300                              WM2000_MODE_MOUSE_ENABLE |
 301                              WM2000_MODE_THERMAL_ENABLE);
 302         }
 303
 304         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 305         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 306
 307         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 308                              WM2000_STATUS_MOUSE_ACTIVE)) {
 309                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 310                 return -ETIMEDOUT;
 311         }
 312
 313         wm2000->anc_mode = ANC_ACTIVE;
 314         dev_dbg(&i2c->dev, "MOUSE active\n");
 315
 316         return 0;
 317 }
 318
 319 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
 320 {
 321         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 322
 323         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 324
 325         if (analogue) {
 326                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
 327
 328                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 329                              WM2000_MODE_ANA_SEQ_INCLUDE |
 330                              WM2000_MODE_THERMAL_ENABLE |
 331                              WM2000_MODE_STANDBY_ENTRY);
 332         } else {
 333                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 334                              WM2000_MODE_THERMAL_ENABLE |
 335                              WM2000_MODE_STANDBY_ENTRY);
 336         }
 337
 338         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 339                              WM2000_STATUS_ANC_DISABLED)) {
 340                 dev_err(&i2c->dev,
 341                         "Timed out waiting for ANC disable after 1ms\n");
 342                 return -ETIMEDOUT;
 343         }
 344
 345         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
 346                 dev_err(&i2c->dev,
 347                         "Timed out waiting for standby\n");
 348                 return -ETIMEDOUT;
 349         }
 350
 351         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 352         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 353
 354         wm2000->anc_mode = ANC_STANDBY;
 355         dev_dbg(&i2c->dev, "standby\n");
 356         if (analogue)
 357                 dev_dbg(&i2c->dev, "Analogue disabled\n");
 358
 359         return 0;
 360 }
 361
 362 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
 363 {
 364         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 365
 366         BUG_ON(wm2000->anc_mode != ANC_STANDBY);
 367
 368         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 369
 370         if (analogue) {
 371                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
 372
 373                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 374                              WM2000_MODE_ANA_SEQ_INCLUDE |
 375                              WM2000_MODE_THERMAL_ENABLE |
 376                              WM2000_MODE_MOUSE_ENABLE);
 377         } else {
 378                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 379                              WM2000_MODE_THERMAL_ENABLE |
 380                              WM2000_MODE_MOUSE_ENABLE);
 381         }
 382
 383         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 384         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 385
 386         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 387                              WM2000_STATUS_MOUSE_ACTIVE)) {
 388                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 389                 return -ETIMEDOUT;
 390         }
 391
 392         wm2000->anc_mode = ANC_ACTIVE;
 393         dev_dbg(&i2c->dev, "MOUSE active\n");
 394         if (analogue)
 395                 dev_dbg(&i2c->dev, "Analogue enabled\n");
 396
 397         return 0;
 398 }
 399
 400 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
 401
 402 static struct {
 403         enum wm2000_anc_mode source;
 404         enum wm2000_anc_mode dest;
 405         int analogue;
 406         wm2000_mode_fn step[2];
 407 } anc_transitions[] = {
 408         {
 409                 .source = ANC_OFF,
 410                 .dest = ANC_ACTIVE,
 411                 .analogue = 1,
 412                 .step = {
 413                         wm2000_power_up,
 414                 },
 415         },
 416         {
 417                 .source = ANC_OFF,
 418                 .dest = ANC_STANDBY,
 419                 .step = {
 420                         wm2000_power_up,
 421                         wm2000_enter_standby,
 422                 },
 423         },
 424         {
 425                 .source = ANC_OFF,
 426                 .dest = ANC_BYPASS,
 427                 .analogue = 1,
 428                 .step = {
 429                         wm2000_power_up,
 430                         wm2000_enter_bypass,
 431                 },
 432         },
 433         {
 434                 .source = ANC_ACTIVE,
 435                 .dest = ANC_BYPASS,
 436                 .analogue = 1,
 437                 .step = {
 438                         wm2000_enter_bypass,
 439                 },
 440         },
 441         {
 442                 .source = ANC_ACTIVE,
 443                 .dest = ANC_STANDBY,
 444                 .analogue = 1,
 445                 .step = {
 446                         wm2000_enter_standby,
 447                 },
 448         },
 449         {
 450                 .source = ANC_ACTIVE,
 451                 .dest = ANC_OFF,
 452                 .analogue = 1,
 453                 .step = {
 454                         wm2000_power_down,
 455                 },
 456         },
 457         {
 458                 .source = ANC_BYPASS,
 459                 .dest = ANC_ACTIVE,
 460                 .analogue = 1,
 461                 .step = {
 462                         wm2000_exit_bypass,
 463                 },
 464         },
 465         {
 466                 .source = ANC_BYPASS,
 467                 .dest = ANC_STANDBY,
 468                 .analogue = 1,
 469                 .step = {
 470                         wm2000_exit_bypass,
 471                         wm2000_enter_standby,
 472                 },
 473         },
 474         {
 475                 .source = ANC_BYPASS,
 476                 .dest = ANC_OFF,
 477                 .step = {
 478                         wm2000_exit_bypass,
 479                         wm2000_power_down,
 480                 },
 481         },
 482         {
 483                 .source = ANC_STANDBY,
 484                 .dest = ANC_ACTIVE,
 485                 .analogue = 1,
 486                 .step = {
 487                         wm2000_exit_standby,
 488                 },
 489         },
 490         {
 491                 .source = ANC_STANDBY,
 492                 .dest = ANC_BYPASS,
 493                 .analogue = 1,
 494                 .step = {
 495                         wm2000_exit_standby,
 496                         wm2000_enter_bypass,
 497                 },
 498         },
 499         {
 500                 .source = ANC_STANDBY,
 501                 .dest = ANC_OFF,
 502                 .step = {
 503                         wm2000_exit_standby,
 504                         wm2000_power_down,
 505                 },
 506         },
 507 };
 508
 509 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
 510                                  enum wm2000_anc_mode mode)
 511 {
 512         struct i2c_client *i2c = wm2000->i2c;
 513         int i, j;
 514         int ret;
 515
 516         if (wm2000->anc_mode == mode)
 517                 return 0;
 518
 519         for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
 520                 if (anc_transitions[i].source == wm2000->anc_mode &&
 521                     anc_transitions[i].dest == mode)
 522                         break;
 523         if (i == ARRAY_SIZE(anc_transitions)) {
 524                 dev_err(&i2c->dev, "No transition for %d->%d\n",
 525                         wm2000->anc_mode, mode);
 526                 return -EINVAL;
 527         }
 528
 529         for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
 530                 if (!anc_transitions[i].step[j])
 531                         break;
 532                 ret = anc_transitions[i].step[j](i2c,
 533                                                  anc_transitions[i].analogue);
 534                 if (ret != 0)
 535                         return ret;
 536         }
 537
 538         return 0;
 539 }
 540
 541 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
 542 {
 543         struct i2c_client *i2c = wm2000->i2c;
 544         enum wm2000_anc_mode mode;
 545
 546         if (wm2000->anc_eng_ena && wm2000->spk_ena)
 547                 if (wm2000->anc_active)
 548                         mode = ANC_ACTIVE;
 549                 else
 550                         mode = ANC_BYPASS;
 551         else
 552                 mode = ANC_STANDBY;
 553
 554         dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
 555                 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
 556                 wm2000->anc_active);
 557
 558         return wm2000_anc_transition(wm2000, mode);
 559 }
 560
 561 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
 562                                struct snd_ctl_elem_value *ucontrol)
 563 {
 564         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 565         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 566
 567         ucontrol->value.enumerated.item[0] = wm2000->anc_active;
 568
 569         return 0;
 570 }
 571
 572 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
 573                                struct snd_ctl_elem_value *ucontrol)
 574 {
 575         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 576         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 577         int anc_active = ucontrol->value.enumerated.item[0];
 578
 579         if (anc_active > 1)
 580                 return -EINVAL;
 581
 582         wm2000->anc_active = anc_active;
 583
 584         return wm2000_anc_set_mode(wm2000);
 585 }
 586
 587 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
 588                               struct snd_ctl_elem_value *ucontrol)
 589 {
 590         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 591         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 592
 593         ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
 594
 595         return 0;
 596 }
 597
 598 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
 599                               struct snd_ctl_elem_value *ucontrol)
 600 {
 601         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 602         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 603         int val = ucontrol->value.enumerated.item[0];
 604
 605         if (val > 1)
 606                 return -EINVAL;
 607
 608         wm2000->spk_ena = val;
 609
 610         return wm2000_anc_set_mode(wm2000);
 611 }
 612
 613 static const struct snd_kcontrol_new wm2000_controls[] = {
 614         SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
 615                             wm2000_anc_mode_get,
 616                             wm2000_anc_mode_put),
 617         SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
 618                             wm2000_speaker_get,
 619                             wm2000_speaker_put),
 620 };
 621
 622 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
 623                                   struct snd_kcontrol *kcontrol, int event)
 624 {
 625         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 626         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 627
 628         if (SND_SOC_DAPM_EVENT_ON(event))
 629                 wm2000->anc_eng_ena = 1;
 630
 631         if (SND_SOC_DAPM_EVENT_OFF(event))
 632                 wm2000->anc_eng_ena = 0;
 633
 634         return wm2000_anc_set_mode(wm2000);
 635 }
 636
 637 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
 638 /* Externally visible pins */
 639 SND_SOC_DAPM_OUTPUT("SPKN"),
 640 SND_SOC_DAPM_OUTPUT("SPKP"),
 641
 642 SND_SOC_DAPM_INPUT("LINN"),
 643 SND_SOC_DAPM_INPUT("LINP"),
 644
 645 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
 646                    wm2000_anc_power_event,
 647                    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 648 };
 649
 650 /* Target, Path, Source */
 651 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
 652         { "SPKN", NULL, "ANC Engine" },
 653         { "SPKP", NULL, "ANC Engine" },
 654         { "ANC Engine", NULL, "LINN" },
 655         { "ANC Engine", NULL, "LINP" },
 656 };
 657
 658 #ifdef CONFIG_PM
 659 static int wm2000_suspend(struct snd_soc_codec *codec)
 660 {
 661         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 662
 663         return wm2000_anc_transition(wm2000, ANC_OFF);
 664 }
 665
 666 static int wm2000_resume(struct snd_soc_codec *codec)
 667 {
 668         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 669
 670         return wm2000_anc_set_mode(wm2000);
 671 }
 672 #else
 673 #define wm2000_suspend NULL
 674 #define wm2000_resume NULL
 675 #endif
 676
 677 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
 678 {
 679         switch (reg) {
 680         case WM2000_REG_SYS_START:
 681         case WM2000_REG_SPEECH_CLARITY:
 682         case WM2000_REG_SYS_WATCHDOG:
 683         case WM2000_REG_ANA_VMID_PD_TIME:
 684         case WM2000_REG_ANA_VMID_PU_TIME:
 685         case WM2000_REG_CAT_FLTR_INDX:
 686         case WM2000_REG_CAT_GAIN_0:
 687         case WM2000_REG_SYS_STATUS:
 688         case WM2000_REG_SYS_MODE_CNTRL:
 689         case WM2000_REG_SYS_START0:
 690         case WM2000_REG_SYS_START1:
 691         case WM2000_REG_ID1:
 692         case WM2000_REG_ID2:
 693         case WM2000_REG_REVISON:
 694         case WM2000_REG_SYS_CTL1:
 695         case WM2000_REG_SYS_CTL2:
 696         case WM2000_REG_ANC_STAT:
 697         case WM2000_REG_IF_CTL:
 698                 return true;
 699         default:
 700                 return false;
 701         }
 702 }
 703
 704 static const struct regmap_config wm2000_regmap = {
 705         .reg_bits = 8,
 706         .val_bits = 8,
 707
 708         .max_register = WM2000_REG_IF_CTL,
 709         .readable_reg = wm2000_readable_reg,
 710 };
 711
 712 static int wm2000_probe(struct snd_soc_codec *codec)
 713 {
 714         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 715
 716         /* This will trigger a transition to standby mode by default */
 717         wm2000_anc_set_mode(wm2000);
 718
 719         return 0;
 720 }
 721
 722 static int wm2000_remove(struct snd_soc_codec *codec)
 723 {
 724         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 725
 726         return wm2000_anc_transition(wm2000, ANC_OFF);
 727 }
 728
 729 static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
 730         .probe = wm2000_probe,
 731         .remove = wm2000_remove,
 732         .suspend = wm2000_suspend,
 733         .resume = wm2000_resume,
 734
 735         .dapm_widgets = wm2000_dapm_widgets,
 736         .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
 737         .dapm_routes = wm2000_audio_map,
 738         .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
 739         .controls = wm2000_controls,
 740         .num_controls = ARRAY_SIZE(wm2000_controls),
 741 };
 742
 743 static int __devinit wm2000_i2c_probe(struct i2c_client *i2c,
 744                                       const struct i2c_device_id *i2c_id)
 745 {
 746         struct wm2000_priv *wm2000;
 747         struct wm2000_platform_data *pdata;
 748         const char *filename;
 749         const struct firmware *fw = NULL;
 750         int ret;
 751         int reg;
 752         u16 id;
 753
 754         wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
 755                               GFP_KERNEL);
 756         if (wm2000 == NULL) {
 757                 dev_err(&i2c->dev, "Unable to allocate private data\n");
 758                 return -ENOMEM;
 759         }
 760
 761         dev_set_drvdata(&i2c->dev, wm2000);
 762
 763         wm2000->regmap = regmap_init_i2c(i2c, &wm2000_regmap);
 764         if (IS_ERR(wm2000->regmap)) {
 765                 ret = PTR_ERR(wm2000->regmap);
 766                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 767                         ret);
 768                 goto out;
 769         }
 770
 771         /* Verify that this is a WM2000 */
 772         reg = wm2000_read(i2c, WM2000_REG_ID1);
 773         id = reg << 8;
 774         reg = wm2000_read(i2c, WM2000_REG_ID2);
 775         id |= reg & 0xff;
 776
 777         if (id != 0x2000) {
 778                 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
 779                 ret = -ENODEV;
 780                 goto out_regmap_exit;
 781         }
 782
 783         reg = wm2000_read(i2c, WM2000_REG_REVISON);
 784         dev_info(&i2c->dev, "revision %c\n", reg + 'A');
 785
 786         filename = "wm2000_anc.bin";
 787         pdata = dev_get_platdata(&i2c->dev);
 788         if (pdata) {
 789                 wm2000->mclk_div = pdata->mclkdiv2;
 790                 wm2000->speech_clarity = !pdata->speech_enh_disable;
 791
 792                 if (pdata->download_file)
 793                         filename = pdata->download_file;
 794         }
 795
 796         ret = request_firmware(&fw, filename, &i2c->dev);
 797         if (ret != 0) {
 798                 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
 799                 goto out_regmap_exit;
 800         }
 801
 802         /* Pre-cook the concatenation of the register address onto the image */
 803         wm2000->anc_download_size = fw->size + 2;
 804         wm2000->anc_download = devm_kzalloc(&i2c->dev,
 805                                             wm2000->anc_download_size,
 806                                             GFP_KERNEL);
 807         if (wm2000->anc_download == NULL) {
 808                 dev_err(&i2c->dev, "Out of memory\n");
 809                 ret = -ENOMEM;
 810                 goto out_regmap_exit;
 811         }
 812
 813         wm2000->anc_download[0] = 0x80;
 814         wm2000->anc_download[1] = 0x00;
 815         memcpy(wm2000->anc_download + 2, fw->data, fw->size);
 816
 817         wm2000->anc_eng_ena = 1;
 818         wm2000->anc_active = 1;
 819         wm2000->spk_ena = 1;
 820         wm2000->i2c = i2c;
 821
 822         wm2000_reset(wm2000);
 823
 824         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
 825         if (!ret)
 826                 goto out;
 827
 828 out_regmap_exit:
 829         regmap_exit(wm2000->regmap);
 830 out:
 831         release_firmware(fw);
 832         return ret;
 833 }
 834
 835 static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)
 836 {
 837         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 838
 839         snd_soc_unregister_codec(&i2c->dev);
 840         regmap_exit(wm2000->regmap);
 841
 842         return 0;
 843 }
 844
 845 static const struct i2c_device_id wm2000_i2c_id[] = {
 846         { "wm2000", 0 },
 847         { }
 848 };
 849 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
 850
 851 static struct i2c_driver wm2000_i2c_driver = {
 852         .driver = {
 853                 .name = "wm2000",
 854                 .owner = THIS_MODULE,
 855         },
 856         .probe = wm2000_i2c_probe,
 857         .remove = __devexit_p(wm2000_i2c_remove),
 858         .id_table = wm2000_i2c_id,
 859 };
 860
 861 module_i2c_driver(wm2000_i2c_driver);
 862
 863 MODULE_DESCRIPTION("ASoC WM2000 driver");
 864 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
 865 MODULE_LICENSE("GPL");