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