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   1 /*
   2  * wm2000.c  --  WM2000 ALSA Soc Audio driver
   3  *
   4  * Copyright 2008-2010 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  * 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/version.h>
  27 #include <linux/kernel.h>
  28 #include <linux/init.h>
  29 #include <linux/firmware.h>
  30 #include <linux/delay.h>
  31 #include <linux/pm.h>
  32 #include <linux/i2c.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/debugfs.h>
  35 #include <linux/slab.h>
  36 #include <sound/core.h>
  37 #include <sound/pcm.h>
  38 #include <sound/pcm_params.h>
  39 #include <sound/soc.h>
  40 #include <sound/soc-dapm.h>
  41 #include <sound/initval.h>
  42 #include <sound/tlv.h>
  43
  44 #include <sound/wm2000.h>
  45
  46 #include "wm2000.h"
  47
  48 enum wm2000_anc_mode {
  49         ANC_ACTIVE = 0,
  50         ANC_BYPASS = 1,
  51         ANC_STANDBY = 2,
  52         ANC_OFF = 3,
  53 };
  54
  55 struct wm2000_priv {
  56         struct i2c_client *i2c;
  57
  58         enum wm2000_anc_mode anc_mode;
  59
  60         unsigned int anc_active:1;
  61         unsigned int anc_eng_ena:1;
  62         unsigned int spk_ena:1;
  63
  64         unsigned int mclk_div:1;
  65         unsigned int speech_clarity:1;
  66
  67         int anc_download_size;
  68         char *anc_download;
  69 };
  70
  71 static struct i2c_client *wm2000_i2c;
  72
  73 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
  74                         unsigned int value)
  75 {
  76         u8 data[3];
  77         int ret;
  78
  79         data[0] = (reg >> 8) & 0xff;
  80         data[1] = reg & 0xff;
  81         data[2] = value & 0xff;
  82
  83         dev_vdbg(&i2c->dev, "write %x = %x\n", reg, value);
  84
  85         ret = i2c_master_send(i2c, data, 3);
  86         if (ret == 3)
  87                 return 0;
  88         if (ret < 0)
  89                 return ret;
  90         else
  91                 return -EIO;
  92 }
  93
  94 static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
  95 {
  96         struct i2c_msg xfer[2];
  97         u8 reg[2];
  98         u8 data;
  99         int ret;
 100
 101         /* Write register */
 102         reg[0] = (r >> 8) & 0xff;
 103         reg[1] = r & 0xff;
 104         xfer[0].addr = i2c->addr;
 105         xfer[0].flags = 0;
 106         xfer[0].len = sizeof(reg);
 107         xfer[0].buf = &reg[0];
 108
 109         /* Read data */
 110         xfer[1].addr = i2c->addr;
 111         xfer[1].flags = I2C_M_RD;
 112         xfer[1].len = 1;
 113         xfer[1].buf = &data;
 114
 115         ret = i2c_transfer(i2c->adapter, xfer, 2);
 116         if (ret != 2) {
 117                 dev_err(&i2c->dev, "i2c_transfer() returned %d\n", ret);
 118                 return 0;
 119         }
 120
 121         dev_vdbg(&i2c->dev, "read %x from %x\n", data, r);
 122
 123         return data;
 124 }
 125
 126 static void wm2000_reset(struct wm2000_priv *wm2000)
 127 {
 128         struct i2c_client *i2c = wm2000->i2c;
 129
 130         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 131         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 132         wm2000_write(i2c, WM2000_REG_ID1, 0);
 133
 134         wm2000->anc_mode = ANC_OFF;
 135 }
 136
 137 static int wm2000_poll_bit(struct i2c_client *i2c,
 138                            unsigned int reg, u8 mask, int timeout)
 139 {
 140         int val;
 141
 142         val = wm2000_read(i2c, reg);
 143
 144         while (!(val & mask) && --timeout) {
 145                 msleep(1);
 146                 val = wm2000_read(i2c, reg);
 147         }
 148
 149         if (timeout == 0)
 150                 return 0;
 151         else
 152                 return 1;
 153 }
 154
 155 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
 156 {
 157         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 158         int ret, timeout;
 159
 160         BUG_ON(wm2000->anc_mode != ANC_OFF);
 161
 162         dev_dbg(&i2c->dev, "Beginning power up\n");
 163
 164         if (!wm2000->mclk_div) {
 165                 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
 166                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 167                              WM2000_MCLK_DIV2_ENA_CLR);
 168         } else {
 169                 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
 170                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 171                              WM2000_MCLK_DIV2_ENA_SET);
 172         }
 173
 174         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 175         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
 176
 177         /* Wait for ANC engine to become ready */
 178         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 179                              WM2000_ANC_ENG_IDLE, 1)) {
 180                 dev_err(&i2c->dev, "ANC engine failed to reset\n");
 181                 return -ETIMEDOUT;
 182         }
 183
 184         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 185                              WM2000_STATUS_BOOT_COMPLETE, 1)) {
 186                 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
 187                 return -ETIMEDOUT;
 188         }
 189
 190         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 191
 192         /* Open code download of the data since it is the only bulk
 193          * write we do. */
 194         dev_dbg(&i2c->dev, "Downloading %d bytes\n",
 195                 wm2000->anc_download_size - 2);
 196
 197         ret = i2c_master_send(i2c, wm2000->anc_download,
 198                               wm2000->anc_download_size);
 199         if (ret < 0) {
 200                 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
 201                 return ret;
 202         }
 203         if (ret != wm2000->anc_download_size) {
 204                 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
 205                         ret, wm2000->anc_download_size);
 206                 return -EIO;
 207         }
 208
 209         dev_dbg(&i2c->dev, "Download complete\n");
 210
 211         if (analogue) {
 212                 timeout = 248;
 213                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
 214
 215                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 216                              WM2000_MODE_ANA_SEQ_INCLUDE |
 217                              WM2000_MODE_MOUSE_ENABLE |
 218                              WM2000_MODE_THERMAL_ENABLE);
 219         } else {
 220                 timeout = 10;
 221
 222                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 223                              WM2000_MODE_MOUSE_ENABLE |
 224                              WM2000_MODE_THERMAL_ENABLE);
 225         }
 226
 227         ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
 228         if (wm2000->speech_clarity)
 229                 ret &= ~WM2000_SPEECH_CLARITY;
 230         else
 231                 ret |= WM2000_SPEECH_CLARITY;
 232         wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
 233
 234         wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
 235         wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
 236
 237         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 238
 239         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 240                              WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
 241                 dev_err(&i2c->dev, "Timed out waiting for device after %dms\n",
 242                         timeout * 10);
 243                 return -ETIMEDOUT;
 244         }
 245
 246         dev_dbg(&i2c->dev, "ANC active\n");
 247         if (analogue)
 248                 dev_dbg(&i2c->dev, "Analogue active\n");
 249         wm2000->anc_mode = ANC_ACTIVE;
 250
 251         return 0;
 252 }
 253
 254 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
 255 {
 256         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 257         int timeout;
 258
 259         if (analogue) {
 260                 timeout = 248;
 261                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
 262                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 263                              WM2000_MODE_ANA_SEQ_INCLUDE |
 264                              WM2000_MODE_POWER_DOWN);
 265         } else {
 266                 timeout = 10;
 267                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 268                              WM2000_MODE_POWER_DOWN);
 269         }
 270
 271         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 272                              WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) {
 273                 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
 274                 return -ETIMEDOUT;
 275         }
 276
 277         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 278                              WM2000_ANC_ENG_IDLE, 1)) {
 279                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 280                 return -ETIMEDOUT;
 281         }
 282
 283         dev_dbg(&i2c->dev, "powered off\n");
 284         wm2000->anc_mode = ANC_OFF;
 285
 286         return 0;
 287 }
 288
 289 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
 290 {
 291         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 292
 293         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 294
 295         if (analogue) {
 296                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 297                              WM2000_MODE_ANA_SEQ_INCLUDE |
 298                              WM2000_MODE_THERMAL_ENABLE |
 299                              WM2000_MODE_BYPASS_ENTRY);
 300         } else {
 301                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 302                              WM2000_MODE_THERMAL_ENABLE |
 303                              WM2000_MODE_BYPASS_ENTRY);
 304         }
 305
 306         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 307                              WM2000_STATUS_ANC_DISABLED, 10)) {
 308                 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
 309                 return -ETIMEDOUT;
 310         }
 311
 312         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 313                              WM2000_ANC_ENG_IDLE, 1)) {
 314                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 315                 return -ETIMEDOUT;
 316         }
 317
 318         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 319         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 320
 321         wm2000->anc_mode = ANC_BYPASS;
 322         dev_dbg(&i2c->dev, "bypass enabled\n");
 323
 324         return 0;
 325 }
 326
 327 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
 328 {
 329         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 330
 331         BUG_ON(wm2000->anc_mode != ANC_BYPASS);
 332
 333         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 334
 335         if (analogue) {
 336                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 337                              WM2000_MODE_ANA_SEQ_INCLUDE |
 338                              WM2000_MODE_MOUSE_ENABLE |
 339                              WM2000_MODE_THERMAL_ENABLE);
 340         } else {
 341                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 342                              WM2000_MODE_MOUSE_ENABLE |
 343                              WM2000_MODE_THERMAL_ENABLE);
 344         }
 345
 346         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 347         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 348
 349         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 350                              WM2000_STATUS_MOUSE_ACTIVE, 10)) {
 351                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 352                 return -ETIMEDOUT;
 353         }
 354
 355         wm2000->anc_mode = ANC_ACTIVE;
 356         dev_dbg(&i2c->dev, "MOUSE active\n");
 357
 358         return 0;
 359 }
 360
 361 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
 362 {
 363         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 364         int timeout;
 365
 366         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 367
 368         if (analogue) {
 369                 timeout = 248;
 370                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
 371
 372                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 373                              WM2000_MODE_ANA_SEQ_INCLUDE |
 374                              WM2000_MODE_THERMAL_ENABLE |
 375                              WM2000_MODE_STANDBY_ENTRY);
 376         } else {
 377                 timeout = 10;
 378
 379                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 380                              WM2000_MODE_THERMAL_ENABLE |
 381                              WM2000_MODE_STANDBY_ENTRY);
 382         }
 383
 384         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 385                              WM2000_STATUS_ANC_DISABLED, timeout)) {
 386                 dev_err(&i2c->dev,
 387                         "Timed out waiting for ANC disable after 1ms\n");
 388                 return -ETIMEDOUT;
 389         }
 390
 391         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE,
 392                              1)) {
 393                 dev_err(&i2c->dev,
 394                         "Timed out waiting for standby after %dms\n",
 395                         timeout * 10);
 396                 return -ETIMEDOUT;
 397         }
 398
 399         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 400         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 401
 402         wm2000->anc_mode = ANC_STANDBY;
 403         dev_dbg(&i2c->dev, "standby\n");
 404         if (analogue)
 405                 dev_dbg(&i2c->dev, "Analogue disabled\n");
 406
 407         return 0;
 408 }
 409
 410 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
 411 {
 412         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 413         int timeout;
 414
 415         BUG_ON(wm2000->anc_mode != ANC_STANDBY);
 416
 417         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 418
 419         if (analogue) {
 420                 timeout = 248;
 421                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
 422
 423                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 424                              WM2000_MODE_ANA_SEQ_INCLUDE |
 425                              WM2000_MODE_THERMAL_ENABLE |
 426                              WM2000_MODE_MOUSE_ENABLE);
 427         } else {
 428                 timeout = 10;
 429
 430                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 431                              WM2000_MODE_THERMAL_ENABLE |
 432                              WM2000_MODE_MOUSE_ENABLE);
 433         }
 434
 435         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 436         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 437
 438         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 439                              WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
 440                 dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n",
 441                         timeout * 10);
 442                 return -ETIMEDOUT;
 443         }
 444
 445         wm2000->anc_mode = ANC_ACTIVE;
 446         dev_dbg(&i2c->dev, "MOUSE active\n");
 447         if (analogue)
 448                 dev_dbg(&i2c->dev, "Analogue enabled\n");
 449
 450         return 0;
 451 }
 452
 453 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
 454
 455 static struct {
 456         enum wm2000_anc_mode source;
 457         enum wm2000_anc_mode dest;
 458         int analogue;
 459         wm2000_mode_fn step[2];
 460 } anc_transitions[] = {
 461         {
 462                 .source = ANC_OFF,
 463                 .dest = ANC_ACTIVE,
 464                 .analogue = 1,
 465                 .step = {
 466                         wm2000_power_up,
 467                 },
 468         },
 469         {
 470                 .source = ANC_OFF,
 471                 .dest = ANC_STANDBY,
 472                 .step = {
 473                         wm2000_power_up,
 474                         wm2000_enter_standby,
 475                 },
 476         },
 477         {
 478                 .source = ANC_OFF,
 479                 .dest = ANC_BYPASS,
 480                 .analogue = 1,
 481                 .step = {
 482                         wm2000_power_up,
 483                         wm2000_enter_bypass,
 484                 },
 485         },
 486         {
 487                 .source = ANC_ACTIVE,
 488                 .dest = ANC_BYPASS,
 489                 .analogue = 1,
 490                 .step = {
 491                         wm2000_enter_bypass,
 492                 },
 493         },
 494         {
 495                 .source = ANC_ACTIVE,
 496                 .dest = ANC_STANDBY,
 497                 .analogue = 1,
 498                 .step = {
 499                         wm2000_enter_standby,
 500                 },
 501         },
 502         {
 503                 .source = ANC_ACTIVE,
 504                 .dest = ANC_OFF,
 505                 .analogue = 1,
 506                 .step = {
 507                         wm2000_power_down,
 508                 },
 509         },
 510         {
 511                 .source = ANC_BYPASS,
 512                 .dest = ANC_ACTIVE,
 513                 .analogue = 1,
 514                 .step = {
 515                         wm2000_exit_bypass,
 516                 },
 517         },
 518         {
 519                 .source = ANC_BYPASS,
 520                 .dest = ANC_STANDBY,
 521                 .analogue = 1,
 522                 .step = {
 523                         wm2000_exit_bypass,
 524                         wm2000_enter_standby,
 525                 },
 526         },
 527         {
 528                 .source = ANC_BYPASS,
 529                 .dest = ANC_OFF,
 530                 .step = {
 531                         wm2000_exit_bypass,
 532                         wm2000_power_down,
 533                 },
 534         },
 535         {
 536                 .source = ANC_STANDBY,
 537                 .dest = ANC_ACTIVE,
 538                 .analogue = 1,
 539                 .step = {
 540                         wm2000_exit_standby,
 541                 },
 542         },
 543         {
 544                 .source = ANC_STANDBY,
 545                 .dest = ANC_BYPASS,
 546                 .analogue = 1,
 547                 .step = {
 548                         wm2000_exit_standby,
 549                         wm2000_enter_bypass,
 550                 },
 551         },
 552         {
 553                 .source = ANC_STANDBY,
 554                 .dest = ANC_OFF,
 555                 .step = {
 556                         wm2000_exit_standby,
 557                         wm2000_power_down,
 558                 },
 559         },
 560 };
 561
 562 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
 563                                  enum wm2000_anc_mode mode)
 564 {
 565         struct i2c_client *i2c = wm2000->i2c;
 566         int i, j;
 567         int ret;
 568
 569         if (wm2000->anc_mode == mode)
 570                 return 0;
 571
 572         for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
 573                 if (anc_transitions[i].source == wm2000->anc_mode &&
 574                     anc_transitions[i].dest == mode)
 575                         break;
 576         if (i == ARRAY_SIZE(anc_transitions)) {
 577                 dev_err(&i2c->dev, "No transition for %d->%d\n",
 578                         wm2000->anc_mode, mode);
 579                 return -EINVAL;
 580         }
 581
 582         for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
 583                 if (!anc_transitions[i].step[j])
 584                         break;
 585                 ret = anc_transitions[i].step[j](i2c,
 586                                                  anc_transitions[i].analogue);
 587                 if (ret != 0)
 588                         return ret;
 589         }
 590
 591         return 0;
 592 }
 593
 594 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
 595 {
 596         struct i2c_client *i2c = wm2000->i2c;
 597         enum wm2000_anc_mode mode;
 598
 599         if (wm2000->anc_eng_ena && wm2000->spk_ena)
 600                 if (wm2000->anc_active)
 601                         mode = ANC_ACTIVE;
 602                 else
 603                         mode = ANC_BYPASS;
 604         else
 605                 mode = ANC_STANDBY;
 606
 607         dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
 608                 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
 609                 wm2000->anc_active);
 610
 611         return wm2000_anc_transition(wm2000, mode);
 612 }
 613
 614 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
 615                                struct snd_ctl_elem_value *ucontrol)
 616 {
 617         struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
 618
 619         ucontrol->value.enumerated.item[0] = wm2000->anc_active;
 620
 621         return 0;
 622 }
 623
 624 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
 625                                struct snd_ctl_elem_value *ucontrol)
 626 {
 627         struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
 628         int anc_active = ucontrol->value.enumerated.item[0];
 629
 630         if (anc_active > 1)
 631                 return -EINVAL;
 632
 633         wm2000->anc_active = anc_active;
 634
 635         return wm2000_anc_set_mode(wm2000);
 636 }
 637
 638 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
 639                               struct snd_ctl_elem_value *ucontrol)
 640 {
 641         struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
 642
 643         ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
 644
 645         return 0;
 646 }
 647
 648 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
 649                               struct snd_ctl_elem_value *ucontrol)
 650 {
 651         struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
 652         int val = ucontrol->value.enumerated.item[0];
 653
 654         if (val > 1)
 655                 return -EINVAL;
 656
 657         wm2000->spk_ena = val;
 658
 659         return wm2000_anc_set_mode(wm2000);
 660 }
 661
 662 static const struct snd_kcontrol_new wm2000_controls[] = {
 663         SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
 664                             wm2000_anc_mode_get,
 665                             wm2000_anc_mode_put),
 666         SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
 667                             wm2000_speaker_get,
 668                             wm2000_speaker_put),
 669 };
 670
 671 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
 672                                   struct snd_kcontrol *kcontrol, int event)
 673 {
 674         struct wm2000_priv *wm2000 = dev_get_drvdata(&wm2000_i2c->dev);
 675
 676         if (SND_SOC_DAPM_EVENT_ON(event))
 677                 wm2000->anc_eng_ena = 1;
 678
 679         if (SND_SOC_DAPM_EVENT_OFF(event))
 680                 wm2000->anc_eng_ena = 0;
 681
 682         return wm2000_anc_set_mode(wm2000);
 683 }
 684
 685 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
 686 /* Externally visible pins */
 687 SND_SOC_DAPM_OUTPUT("WM2000 SPKN"),
 688 SND_SOC_DAPM_OUTPUT("WM2000 SPKP"),
 689
 690 SND_SOC_DAPM_INPUT("WM2000 LINN"),
 691 SND_SOC_DAPM_INPUT("WM2000 LINP"),
 692
 693 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
 694                    wm2000_anc_power_event,
 695                    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 696 };
 697
 698 /* Target, Path, Source */
 699 static const struct snd_soc_dapm_route audio_map[] = {
 700         { "WM2000 SPKN", NULL, "ANC Engine" },
 701         { "WM2000 SPKP", NULL, "ANC Engine" },
 702         { "ANC Engine", NULL, "WM2000 LINN" },
 703         { "ANC Engine", NULL, "WM2000 LINP" },
 704 };
 705
 706 /* Called from the machine driver */
 707 int wm2000_add_controls(struct snd_soc_codec *codec)
 708 {
 709         int ret;
 710
 711         if (!wm2000_i2c) {
 712                 pr_err("WM2000 not yet probed\n");
 713                 return -ENODEV;
 714         }
 715
 716         ret = snd_soc_dapm_new_controls(codec, wm2000_dapm_widgets,
 717                                         ARRAY_SIZE(wm2000_dapm_widgets));
 718         if (ret < 0)
 719                 return ret;
 720
 721         ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 722         if (ret < 0)
 723                 return ret;
 724
 725         return snd_soc_add_controls(codec, wm2000_controls,
 726                         ARRAY_SIZE(wm2000_controls));
 727 }
 728 EXPORT_SYMBOL_GPL(wm2000_add_controls);
 729
 730 static int __devinit wm2000_i2c_probe(struct i2c_client *i2c,
 731                                       const struct i2c_device_id *i2c_id)
 732 {
 733         struct wm2000_priv *wm2000;
 734         struct wm2000_platform_data *pdata;
 735         const char *filename;
 736         const struct firmware *fw;
 737         int reg, ret;
 738         u16 id;
 739
 740         if (wm2000_i2c) {
 741                 dev_err(&i2c->dev, "Another WM2000 is already registered\n");
 742                 return -EINVAL;
 743         }
 744
 745         wm2000 = kzalloc(sizeof(struct wm2000_priv), GFP_KERNEL);
 746         if (wm2000 == NULL) {
 747                 dev_err(&i2c->dev, "Unable to allocate private data\n");
 748                 return -ENOMEM;
 749         }
 750
 751         /* Verify that this is a WM2000 */
 752         reg = wm2000_read(i2c, WM2000_REG_ID1);
 753         id = reg << 8;
 754         reg = wm2000_read(i2c, WM2000_REG_ID2);
 755         id |= reg & 0xff;
 756
 757         if (id != 0x2000) {
 758                 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
 759                 ret = -ENODEV;
 760                 goto err;
 761         }
 762
 763         reg = wm2000_read(i2c, WM2000_REG_REVISON);
 764         dev_info(&i2c->dev, "revision %c\n", reg + 'A');
 765
 766         filename = "wm2000_anc.bin";
 767         pdata = dev_get_platdata(&i2c->dev);
 768         if (pdata) {
 769                 wm2000->mclk_div = pdata->mclkdiv2;
 770                 wm2000->speech_clarity = !pdata->speech_enh_disable;
 771
 772                 if (pdata->download_file)
 773                         filename = pdata->download_file;
 774         }
 775
 776         ret = request_firmware(&fw, filename, &i2c->dev);
 777         if (ret != 0) {
 778                 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
 779                 goto err;
 780         }
 781
 782         /* Pre-cook the concatenation of the register address onto the image */
 783         wm2000->anc_download_size = fw->size + 2;
 784         wm2000->anc_download = kmalloc(wm2000->anc_download_size, GFP_KERNEL);
 785         if (wm2000->anc_download == NULL) {
 786                 dev_err(&i2c->dev, "Out of memory\n");
 787                 ret = -ENOMEM;
 788                 goto err_fw;
 789         }
 790
 791         wm2000->anc_download[0] = 0x80;
 792         wm2000->anc_download[1] = 0x00;
 793         memcpy(wm2000->anc_download + 2, fw->data, fw->size);
 794
 795         release_firmware(fw);
 796
 797         dev_set_drvdata(&i2c->dev, wm2000);
 798         wm2000->anc_eng_ena = 1;
 799         wm2000->i2c = i2c;
 800
 801         wm2000_reset(wm2000);
 802
 803         /* This will trigger a transition to standby mode by default */
 804         wm2000_anc_set_mode(wm2000);
 805
 806         wm2000_i2c = i2c;
 807
 808         return 0;
 809
 810 err_fw:
 811         release_firmware(fw);
 812 err:
 813         kfree(wm2000);
 814         return ret;
 815 }
 816
 817 static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)
 818 {
 819         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 820
 821         wm2000_anc_transition(wm2000, ANC_OFF);
 822
 823         wm2000_i2c = NULL;
 824         kfree(wm2000->anc_download);
 825         kfree(wm2000);
 826
 827         return 0;
 828 }
 829
 830 static void wm2000_i2c_shutdown(struct i2c_client *i2c)
 831 {
 832         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 833
 834         wm2000_anc_transition(wm2000, ANC_OFF);
 835 }
 836
 837 #ifdef CONFIG_PM
 838 static int wm2000_i2c_suspend(struct i2c_client *i2c, pm_message_t mesg)
 839 {
 840         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 841
 842         return wm2000_anc_transition(wm2000, ANC_OFF);
 843 }
 844
 845 static int wm2000_i2c_resume(struct i2c_client *i2c)
 846 {
 847         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 848
 849         return wm2000_anc_set_mode(wm2000);
 850 }
 851 #else
 852 #define wm2000_i2c_suspend NULL
 853 #define wm2000_i2c_resume NULL
 854 #endif
 855
 856 static const struct i2c_device_id wm2000_i2c_id[] = {
 857         { "wm2000", 0 },
 858         { }
 859 };
 860 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
 861
 862 static struct i2c_driver wm2000_i2c_driver = {
 863         .driver = {
 864                 .name = "wm2000",
 865                 .owner = THIS_MODULE,
 866         },
 867         .probe = wm2000_i2c_probe,
 868         .remove = __devexit_p(wm2000_i2c_remove),
 869         .suspend = wm2000_i2c_suspend,
 870         .resume = wm2000_i2c_resume,
 871         .shutdown = wm2000_i2c_shutdown,
 872         .id_table = wm2000_i2c_id,
 873 };
 874
 875 static int __init wm2000_init(void)
 876 {
 877         return i2c_add_driver(&wm2000_i2c_driver);
 878 }
 879 module_init(wm2000_init);
 880
 881 static void __exit wm2000_exit(void)
 882 {
 883         i2c_del_driver(&wm2000_i2c_driver);
 884 }
 885 module_exit(wm2000_exit);
 886
 887 MODULE_DESCRIPTION("ASoC WM2000 driver");
 888 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
 889 MODULE_LICENSE("GPL");