sound/soc/codecs/wm2000.c

   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/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, int timeout)
 103 {
 104         int val;
 105
 106         val = wm2000_read(i2c, reg);
 107
 108         while (!(val & mask) && --timeout) {
 109                 msleep(1);
 110                 val = wm2000_read(i2c, reg);
 111         }
 112
 113         if (timeout == 0)
 114                 return 0;
 115         else
 116                 return 1;
 117 }
 118
 119 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
 120 {
 121         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 122         int ret, timeout;
 123
 124         BUG_ON(wm2000->anc_mode != ANC_OFF);
 125
 126         dev_dbg(&i2c->dev, "Beginning power up\n");
 127
 128         if (!wm2000->mclk_div) {
 129                 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
 130                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 131                              WM2000_MCLK_DIV2_ENA_CLR);
 132         } else {
 133                 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
 134                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 135                              WM2000_MCLK_DIV2_ENA_SET);
 136         }
 137
 138         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 139         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
 140
 141         /* Wait for ANC engine to become ready */
 142         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 143                              WM2000_ANC_ENG_IDLE, 1)) {
 144                 dev_err(&i2c->dev, "ANC engine failed to reset\n");
 145                 return -ETIMEDOUT;
 146         }
 147
 148         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 149                              WM2000_STATUS_BOOT_COMPLETE, 1)) {
 150                 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
 151                 return -ETIMEDOUT;
 152         }
 153
 154         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 155
 156         /* Open code download of the data since it is the only bulk
 157          * write we do. */
 158         dev_dbg(&i2c->dev, "Downloading %d bytes\n",
 159                 wm2000->anc_download_size - 2);
 160
 161         ret = i2c_master_send(i2c, wm2000->anc_download,
 162                               wm2000->anc_download_size);
 163         if (ret < 0) {
 164                 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
 165                 return ret;
 166         }
 167         if (ret != wm2000->anc_download_size) {
 168                 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
 169                         ret, wm2000->anc_download_size);
 170                 return -EIO;
 171         }
 172
 173         dev_dbg(&i2c->dev, "Download complete\n");
 174
 175         if (analogue) {
 176                 timeout = 248;
 177                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 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                 timeout = 10;
 185
 186                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 187                              WM2000_MODE_MOUSE_ENABLE |
 188                              WM2000_MODE_THERMAL_ENABLE);
 189         }
 190
 191         ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
 192         if (wm2000->speech_clarity)
 193                 ret &= ~WM2000_SPEECH_CLARITY;
 194         else
 195                 ret |= WM2000_SPEECH_CLARITY;
 196         wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
 197
 198         wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
 199         wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
 200
 201         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 202
 203         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 204                              WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
 205                 dev_err(&i2c->dev, "Timed out waiting for device after %dms\n",
 206                         timeout * 10);
 207                 return -ETIMEDOUT;
 208         }
 209
 210         dev_dbg(&i2c->dev, "ANC active\n");
 211         if (analogue)
 212                 dev_dbg(&i2c->dev, "Analogue active\n");
 213         wm2000->anc_mode = ANC_ACTIVE;
 214
 215         return 0;
 216 }
 217
 218 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
 219 {
 220         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 221         int timeout;
 222
 223         if (analogue) {
 224                 timeout = 248;
 225                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
 226                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 227                              WM2000_MODE_ANA_SEQ_INCLUDE |
 228                              WM2000_MODE_POWER_DOWN);
 229         } else {
 230                 timeout = 10;
 231                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 232                              WM2000_MODE_POWER_DOWN);
 233         }
 234
 235         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 236                              WM2000_STATUS_POWER_DOWN_COMPLETE, timeout)) {
 237                 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
 238                 return -ETIMEDOUT;
 239         }
 240
 241         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 242                              WM2000_ANC_ENG_IDLE, 1)) {
 243                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 244                 return -ETIMEDOUT;
 245         }
 246
 247         dev_dbg(&i2c->dev, "powered off\n");
 248         wm2000->anc_mode = ANC_OFF;
 249
 250         return 0;
 251 }
 252
 253 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
 254 {
 255         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 256
 257         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 258
 259         if (analogue) {
 260                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 261                              WM2000_MODE_ANA_SEQ_INCLUDE |
 262                              WM2000_MODE_THERMAL_ENABLE |
 263                              WM2000_MODE_BYPASS_ENTRY);
 264         } else {
 265                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 266                              WM2000_MODE_THERMAL_ENABLE |
 267                              WM2000_MODE_BYPASS_ENTRY);
 268         }
 269
 270         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 271                              WM2000_STATUS_ANC_DISABLED, 10)) {
 272                 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
 273                 return -ETIMEDOUT;
 274         }
 275
 276         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 277                              WM2000_ANC_ENG_IDLE, 1)) {
 278                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 279                 return -ETIMEDOUT;
 280         }
 281
 282         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 283         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 284
 285         wm2000->anc_mode = ANC_BYPASS;
 286         dev_dbg(&i2c->dev, "bypass enabled\n");
 287
 288         return 0;
 289 }
 290
 291 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
 292 {
 293         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 294
 295         BUG_ON(wm2000->anc_mode != ANC_BYPASS);
 296
 297         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 298
 299         if (analogue) {
 300                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 301                              WM2000_MODE_ANA_SEQ_INCLUDE |
 302                              WM2000_MODE_MOUSE_ENABLE |
 303                              WM2000_MODE_THERMAL_ENABLE);
 304         } else {
 305                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 306                              WM2000_MODE_MOUSE_ENABLE |
 307                              WM2000_MODE_THERMAL_ENABLE);
 308         }
 309
 310         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 311         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 312
 313         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 314                              WM2000_STATUS_MOUSE_ACTIVE, 10)) {
 315                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 316                 return -ETIMEDOUT;
 317         }
 318
 319         wm2000->anc_mode = ANC_ACTIVE;
 320         dev_dbg(&i2c->dev, "MOUSE active\n");
 321
 322         return 0;
 323 }
 324
 325 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
 326 {
 327         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 328         int timeout;
 329
 330         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 331
 332         if (analogue) {
 333                 timeout = 248;
 334                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, timeout / 4);
 335
 336                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 337                              WM2000_MODE_ANA_SEQ_INCLUDE |
 338                              WM2000_MODE_THERMAL_ENABLE |
 339                              WM2000_MODE_STANDBY_ENTRY);
 340         } else {
 341                 timeout = 10;
 342
 343                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 344                              WM2000_MODE_THERMAL_ENABLE |
 345                              WM2000_MODE_STANDBY_ENTRY);
 346         }
 347
 348         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 349                              WM2000_STATUS_ANC_DISABLED, timeout)) {
 350                 dev_err(&i2c->dev,
 351                         "Timed out waiting for ANC disable after 1ms\n");
 352                 return -ETIMEDOUT;
 353         }
 354
 355         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE,
 356                              1)) {
 357                 dev_err(&i2c->dev,
 358                         "Timed out waiting for standby after %dms\n",
 359                         timeout * 10);
 360                 return -ETIMEDOUT;
 361         }
 362
 363         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 364         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 365
 366         wm2000->anc_mode = ANC_STANDBY;
 367         dev_dbg(&i2c->dev, "standby\n");
 368         if (analogue)
 369                 dev_dbg(&i2c->dev, "Analogue disabled\n");
 370
 371         return 0;
 372 }
 373
 374 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
 375 {
 376         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 377         int timeout;
 378
 379         BUG_ON(wm2000->anc_mode != ANC_STANDBY);
 380
 381         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 382
 383         if (analogue) {
 384                 timeout = 248;
 385                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, timeout / 4);
 386
 387                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 388                              WM2000_MODE_ANA_SEQ_INCLUDE |
 389                              WM2000_MODE_THERMAL_ENABLE |
 390                              WM2000_MODE_MOUSE_ENABLE);
 391         } else {
 392                 timeout = 10;
 393
 394                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 395                              WM2000_MODE_THERMAL_ENABLE |
 396                              WM2000_MODE_MOUSE_ENABLE);
 397         }
 398
 399         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 400         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 401
 402         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 403                              WM2000_STATUS_MOUSE_ACTIVE, timeout)) {
 404                 dev_err(&i2c->dev, "Timed out waiting for MOUSE after %dms\n",
 405                         timeout * 10);
 406                 return -ETIMEDOUT;
 407         }
 408
 409         wm2000->anc_mode = ANC_ACTIVE;
 410         dev_dbg(&i2c->dev, "MOUSE active\n");
 411         if (analogue)
 412                 dev_dbg(&i2c->dev, "Analogue enabled\n");
 413
 414         return 0;
 415 }
 416
 417 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
 418
 419 static struct {
 420         enum wm2000_anc_mode source;
 421         enum wm2000_anc_mode dest;
 422         int analogue;
 423         wm2000_mode_fn step[2];
 424 } anc_transitions[] = {
 425         {
 426                 .source = ANC_OFF,
 427                 .dest = ANC_ACTIVE,
 428                 .analogue = 1,
 429                 .step = {
 430                         wm2000_power_up,
 431                 },
 432         },
 433         {
 434                 .source = ANC_OFF,
 435                 .dest = ANC_STANDBY,
 436                 .step = {
 437                         wm2000_power_up,
 438                         wm2000_enter_standby,
 439                 },
 440         },
 441         {
 442                 .source = ANC_OFF,
 443                 .dest = ANC_BYPASS,
 444                 .analogue = 1,
 445                 .step = {
 446                         wm2000_power_up,
 447                         wm2000_enter_bypass,
 448                 },
 449         },
 450         {
 451                 .source = ANC_ACTIVE,
 452                 .dest = ANC_BYPASS,
 453                 .analogue = 1,
 454                 .step = {
 455                         wm2000_enter_bypass,
 456                 },
 457         },
 458         {
 459                 .source = ANC_ACTIVE,
 460                 .dest = ANC_STANDBY,
 461                 .analogue = 1,
 462                 .step = {
 463                         wm2000_enter_standby,
 464                 },
 465         },
 466         {
 467                 .source = ANC_ACTIVE,
 468                 .dest = ANC_OFF,
 469                 .analogue = 1,
 470                 .step = {
 471                         wm2000_power_down,
 472                 },
 473         },
 474         {
 475                 .source = ANC_BYPASS,
 476                 .dest = ANC_ACTIVE,
 477                 .analogue = 1,
 478                 .step = {
 479                         wm2000_exit_bypass,
 480                 },
 481         },
 482         {
 483                 .source = ANC_BYPASS,
 484                 .dest = ANC_STANDBY,
 485                 .analogue = 1,
 486                 .step = {
 487                         wm2000_exit_bypass,
 488                         wm2000_enter_standby,
 489                 },
 490         },
 491         {
 492                 .source = ANC_BYPASS,
 493                 .dest = ANC_OFF,
 494                 .step = {
 495                         wm2000_exit_bypass,
 496                         wm2000_power_down,
 497                 },
 498         },
 499         {
 500                 .source = ANC_STANDBY,
 501                 .dest = ANC_ACTIVE,
 502                 .analogue = 1,
 503                 .step = {
 504                         wm2000_exit_standby,
 505                 },
 506         },
 507         {
 508                 .source = ANC_STANDBY,
 509                 .dest = ANC_BYPASS,
 510                 .analogue = 1,
 511                 .step = {
 512                         wm2000_exit_standby,
 513                         wm2000_enter_bypass,
 514                 },
 515         },
 516         {
 517                 .source = ANC_STANDBY,
 518                 .dest = ANC_OFF,
 519                 .step = {
 520                         wm2000_exit_standby,
 521                         wm2000_power_down,
 522                 },
 523         },
 524 };
 525
 526 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
 527                                  enum wm2000_anc_mode mode)
 528 {
 529         struct i2c_client *i2c = wm2000->i2c;
 530         int i, j;
 531         int ret;
 532
 533         if (wm2000->anc_mode == mode)
 534                 return 0;
 535
 536         for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
 537                 if (anc_transitions[i].source == wm2000->anc_mode &&
 538                     anc_transitions[i].dest == mode)
 539                         break;
 540         if (i == ARRAY_SIZE(anc_transitions)) {
 541                 dev_err(&i2c->dev, "No transition for %d->%d\n",
 542                         wm2000->anc_mode, mode);
 543                 return -EINVAL;
 544         }
 545
 546         for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
 547                 if (!anc_transitions[i].step[j])
 548                         break;
 549                 ret = anc_transitions[i].step[j](i2c,
 550                                                  anc_transitions[i].analogue);
 551                 if (ret != 0)
 552                         return ret;
 553         }
 554
 555         return 0;
 556 }
 557
 558 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
 559 {
 560         struct i2c_client *i2c = wm2000->i2c;
 561         enum wm2000_anc_mode mode;
 562
 563         if (wm2000->anc_eng_ena && wm2000->spk_ena)
 564                 if (wm2000->anc_active)
 565                         mode = ANC_ACTIVE;
 566                 else
 567                         mode = ANC_BYPASS;
 568         else
 569                 mode = ANC_STANDBY;
 570
 571         dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
 572                 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
 573                 wm2000->anc_active);
 574
 575         return wm2000_anc_transition(wm2000, mode);
 576 }
 577
 578 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
 579                                struct snd_ctl_elem_value *ucontrol)
 580 {
 581         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 582         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 583
 584         ucontrol->value.enumerated.item[0] = wm2000->anc_active;
 585
 586         return 0;
 587 }
 588
 589 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
 590                                struct snd_ctl_elem_value *ucontrol)
 591 {
 592         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 593         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 594         int anc_active = ucontrol->value.enumerated.item[0];
 595
 596         if (anc_active > 1)
 597                 return -EINVAL;
 598
 599         wm2000->anc_active = anc_active;
 600
 601         return wm2000_anc_set_mode(wm2000);
 602 }
 603
 604 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
 605                               struct snd_ctl_elem_value *ucontrol)
 606 {
 607         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 608         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 609
 610         ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
 611
 612         return 0;
 613 }
 614
 615 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
 616                               struct snd_ctl_elem_value *ucontrol)
 617 {
 618         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 619         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 620         int val = ucontrol->value.enumerated.item[0];
 621
 622         if (val > 1)
 623                 return -EINVAL;
 624
 625         wm2000->spk_ena = val;
 626
 627         return wm2000_anc_set_mode(wm2000);
 628 }
 629
 630 static const struct snd_kcontrol_new wm2000_controls[] = {
 631         SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
 632                             wm2000_anc_mode_get,
 633                             wm2000_anc_mode_put),
 634         SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
 635                             wm2000_speaker_get,
 636                             wm2000_speaker_put),
 637 };
 638
 639 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
 640                                   struct snd_kcontrol *kcontrol, int event)
 641 {
 642         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 643         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 644
 645         if (SND_SOC_DAPM_EVENT_ON(event))
 646                 wm2000->anc_eng_ena = 1;
 647
 648         if (SND_SOC_DAPM_EVENT_OFF(event))
 649                 wm2000->anc_eng_ena = 0;
 650
 651         return wm2000_anc_set_mode(wm2000);
 652 }
 653
 654 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
 655 /* Externally visible pins */
 656 SND_SOC_DAPM_OUTPUT("SPKN"),
 657 SND_SOC_DAPM_OUTPUT("SPKP"),
 658
 659 SND_SOC_DAPM_INPUT("LINN"),
 660 SND_SOC_DAPM_INPUT("LINP"),
 661
 662 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
 663                    wm2000_anc_power_event,
 664                    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 665 };
 666
 667 /* Target, Path, Source */
 668 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
 669         { "SPKN", NULL, "ANC Engine" },
 670         { "SPKP", NULL, "ANC Engine" },
 671         { "ANC Engine", NULL, "LINN" },
 672         { "ANC Engine", NULL, "LINP" },
 673 };
 674
 675 #ifdef CONFIG_PM
 676 static int wm2000_suspend(struct snd_soc_codec *codec)
 677 {
 678         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 679
 680         return wm2000_anc_transition(wm2000, ANC_OFF);
 681 }
 682
 683 static int wm2000_resume(struct snd_soc_codec *codec)
 684 {
 685         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 686
 687         return wm2000_anc_set_mode(wm2000);
 688 }
 689 #else
 690 #define wm2000_suspend NULL
 691 #define wm2000_resume NULL
 692 #endif
 693
 694 static const struct regmap_config wm2000_regmap = {
 695         .reg_bits = 8,
 696         .val_bits = 8,
 697 };
 698
 699 static int wm2000_probe(struct snd_soc_codec *codec)
 700 {
 701         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 702
 703         /* This will trigger a transition to standby mode by default */
 704         wm2000_anc_set_mode(wm2000);
 705
 706         return 0;
 707 }
 708
 709 static int wm2000_remove(struct snd_soc_codec *codec)
 710 {
 711         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 712
 713         return wm2000_anc_transition(wm2000, ANC_OFF);
 714 }
 715
 716 static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
 717         .probe = wm2000_probe,
 718         .remove = wm2000_remove,
 719         .suspend = wm2000_suspend,
 720         .resume = wm2000_resume,
 721
 722         .dapm_widgets = wm2000_dapm_widgets,
 723         .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
 724         .dapm_routes = wm2000_audio_map,
 725         .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
 726         .controls = wm2000_controls,
 727         .num_controls = ARRAY_SIZE(wm2000_controls),
 728 };
 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 = NULL;
 737         int ret;
 738         int reg;
 739         u16 id;
 740
 741         wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
 742                               GFP_KERNEL);
 743         if (wm2000 == NULL) {
 744                 dev_err(&i2c->dev, "Unable to allocate private data\n");
 745                 return -ENOMEM;
 746         }
 747
 748         dev_set_drvdata(&i2c->dev, wm2000);
 749
 750         wm2000->regmap = regmap_init_i2c(i2c, &wm2000_regmap);
 751         if (IS_ERR(wm2000->regmap)) {
 752                 ret = PTR_ERR(wm2000->regmap);
 753                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 754                         ret);
 755                 goto out;
 756         }
 757
 758         /* Verify that this is a WM2000 */
 759         reg = wm2000_read(i2c, WM2000_REG_ID1);
 760         id = reg << 8;
 761         reg = wm2000_read(i2c, WM2000_REG_ID2);
 762         id |= reg & 0xff;
 763
 764         if (id != 0x2000) {
 765                 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
 766                 ret = -ENODEV;
 767                 goto out_regmap_exit;
 768         }
 769
 770         reg = wm2000_read(i2c, WM2000_REG_REVISON);
 771         dev_info(&i2c->dev, "revision %c\n", reg + 'A');
 772
 773         filename = "wm2000_anc.bin";
 774         pdata = dev_get_platdata(&i2c->dev);
 775         if (pdata) {
 776                 wm2000->mclk_div = pdata->mclkdiv2;
 777                 wm2000->speech_clarity = !pdata->speech_enh_disable;
 778
 779                 if (pdata->download_file)
 780                         filename = pdata->download_file;
 781         }
 782
 783         ret = request_firmware(&fw, filename, &i2c->dev);
 784         if (ret != 0) {
 785                 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
 786                 goto out_regmap_exit;
 787         }
 788
 789         /* Pre-cook the concatenation of the register address onto the image */
 790         wm2000->anc_download_size = fw->size + 2;
 791         wm2000->anc_download = devm_kzalloc(&i2c->dev,
 792                                             wm2000->anc_download_size,
 793                                             GFP_KERNEL);
 794         if (wm2000->anc_download == NULL) {
 795                 dev_err(&i2c->dev, "Out of memory\n");
 796                 ret = -ENOMEM;
 797                 goto out_regmap_exit;
 798         }
 799
 800         wm2000->anc_download[0] = 0x80;
 801         wm2000->anc_download[1] = 0x00;
 802         memcpy(wm2000->anc_download + 2, fw->data, fw->size);
 803
 804         wm2000->anc_eng_ena = 1;
 805         wm2000->anc_active = 1;
 806         wm2000->spk_ena = 1;
 807         wm2000->i2c = i2c;
 808
 809         wm2000_reset(wm2000);
 810
 811         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
 812         if (!ret)
 813                 goto out;
 814
 815 out_regmap_exit:
 816         regmap_exit(wm2000->regmap);
 817 out:
 818         release_firmware(fw);
 819         return ret;
 820 }
 821
 822 static __devexit int wm2000_i2c_remove(struct i2c_client *i2c)
 823 {
 824         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 825
 826         snd_soc_unregister_codec(&i2c->dev);
 827         regmap_exit(wm2000->regmap);
 828
 829         return 0;
 830 }
 831
 832 static const struct i2c_device_id wm2000_i2c_id[] = {
 833         { "wm2000", 0 },
 834         { }
 835 };
 836 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
 837
 838 static struct i2c_driver wm2000_i2c_driver = {
 839         .driver = {
 840                 .name = "wm2000",
 841                 .owner = THIS_MODULE,
 842         },
 843         .probe = wm2000_i2c_probe,
 844         .remove = __devexit_p(wm2000_i2c_remove),
 845         .id_table = wm2000_i2c_id,
 846 };
 847
 848 static int __init wm2000_init(void)
 849 {
 850         return i2c_add_driver(&wm2000_i2c_driver);
 851 }
 852 module_init(wm2000_init);
 853
 854 static void __exit wm2000_exit(void)
 855 {
 856         i2c_del_driver(&wm2000_i2c_driver);
 857 }
 858 module_exit(wm2000_exit);
 859
 860 MODULE_DESCRIPTION("ASoC WM2000 driver");
 861 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
 862 MODULE_LICENSE("GPL");