sound/soc/codecs/wm2000.c

   1 /*
   2  * wm2000.c  --  WM2000 ALSA Soc Audio driver
   3  *
   4  * Copyright 2008-2011 Wolfson Microelectronics PLC.
   5  *
   6  * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * The download image for the WM2000 will be requested as
  13  * 'wm2000_anc.bin' by default (overridable via platform data) at
  14  * runtime and is expected to be in flat binary format.  This is
  15  * generated by Wolfson configuration tools and includes
  16  * system-specific callibration information.  If supplied as a
  17  * sequence of ASCII-encoded hexidecimal bytes this can be converted
  18  * into a flat binary with a command such as this on the command line:
  19  *
  20  * perl -e 'while (<>) { s/[\r\n]+// ; printf("%c", hex($_)); }'
  21  *                 < file  > wm2000_anc.bin
  22  */
  23
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/kernel.h>
  27 #include <linux/init.h>
  28 #include <linux/firmware.h>
  29 #include <linux/clk.h>
  30 #include <linux/delay.h>
  31 #include <linux/pm.h>
  32 #include <linux/i2c.h>
  33 #include <linux/regmap.h>
  34 #include <linux/debugfs.h>
  35 #include <linux/regulator/consumer.h>
  36 #include <linux/slab.h>
  37 #include <sound/core.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include <sound/soc.h>
  41 #include <sound/initval.h>
  42 #include <sound/tlv.h>
  43
  44 #include <sound/wm2000.h>
  45
  46 #include "wm2000.h"
  47
  48 #define WM2000_NUM_SUPPLIES 3
  49
  50 static const char *wm2000_supplies[WM2000_NUM_SUPPLIES] = {
  51         "SPKVDD",
  52         "DBVDD",
  53         "DCVDD",
  54 };
  55
  56 enum wm2000_anc_mode {
  57         ANC_ACTIVE = 0,
  58         ANC_BYPASS = 1,
  59         ANC_STANDBY = 2,
  60         ANC_OFF = 3,
  61 };
  62
  63 struct wm2000_priv {
  64         struct i2c_client *i2c;
  65         struct regmap *regmap;
  66         struct clk *mclk;
  67
  68         struct regulator_bulk_data supplies[WM2000_NUM_SUPPLIES];
  69
  70         enum wm2000_anc_mode anc_mode;
  71
  72         unsigned int anc_active:1;
  73         unsigned int anc_eng_ena:1;
  74         unsigned int spk_ena:1;
  75
  76         unsigned int speech_clarity:1;
  77
  78         int anc_download_size;
  79         char *anc_download;
  80
  81         struct mutex lock;
  82 };
  83
  84 static int wm2000_write(struct i2c_client *i2c, unsigned int reg,
  85                         unsigned int value)
  86 {
  87         struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
  88         return regmap_write(wm2000->regmap, reg, value);
  89 }
  90
  91 static unsigned int wm2000_read(struct i2c_client *i2c, unsigned int r)
  92 {
  93         struct wm2000_priv *wm2000 = i2c_get_clientdata(i2c);
  94         unsigned int val;
  95         int ret;
  96
  97         ret = regmap_read(wm2000->regmap, r, &val);
  98         if (ret < 0)
  99                 return -1;
 100
 101         return val;
 102 }
 103
 104 static void wm2000_reset(struct wm2000_priv *wm2000)
 105 {
 106         struct i2c_client *i2c = wm2000->i2c;
 107
 108         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 109         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 110         wm2000_write(i2c, WM2000_REG_ID1, 0);
 111
 112         wm2000->anc_mode = ANC_OFF;
 113 }
 114
 115 static int wm2000_poll_bit(struct i2c_client *i2c,
 116                            unsigned int reg, u8 mask)
 117 {
 118         int timeout = 4000;
 119         int val;
 120
 121         val = wm2000_read(i2c, reg);
 122
 123         while (!(val & mask) && --timeout) {
 124                 msleep(1);
 125                 val = wm2000_read(i2c, reg);
 126         }
 127
 128         if (timeout == 0)
 129                 return 0;
 130         else
 131                 return 1;
 132 }
 133
 134 static int wm2000_power_up(struct i2c_client *i2c, int analogue)
 135 {
 136         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 137         unsigned long rate;
 138         int ret;
 139
 140         BUG_ON(wm2000->anc_mode != ANC_OFF);
 141
 142         dev_dbg(&i2c->dev, "Beginning power up\n");
 143
 144         ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 145         if (ret != 0) {
 146                 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
 147                 return ret;
 148         }
 149
 150         rate = clk_get_rate(wm2000->mclk);
 151         if (rate <= 13500000) {
 152                 dev_dbg(&i2c->dev, "Disabling MCLK divider\n");
 153                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 154                              WM2000_MCLK_DIV2_ENA_CLR);
 155         } else {
 156                 dev_dbg(&i2c->dev, "Enabling MCLK divider\n");
 157                 wm2000_write(i2c, WM2000_REG_SYS_CTL2,
 158                              WM2000_MCLK_DIV2_ENA_SET);
 159         }
 160
 161         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_CLR);
 162         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_ENG_SET);
 163
 164         /* Wait for ANC engine to become ready */
 165         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 166                              WM2000_ANC_ENG_IDLE)) {
 167                 dev_err(&i2c->dev, "ANC engine failed to reset\n");
 168                 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 169                 return -ETIMEDOUT;
 170         }
 171
 172         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 173                              WM2000_STATUS_BOOT_COMPLETE)) {
 174                 dev_err(&i2c->dev, "ANC engine failed to initialise\n");
 175                 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 176                 return -ETIMEDOUT;
 177         }
 178
 179         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 180
 181         /* Open code download of the data since it is the only bulk
 182          * write we do. */
 183         dev_dbg(&i2c->dev, "Downloading %d bytes\n",
 184                 wm2000->anc_download_size - 2);
 185
 186         ret = i2c_master_send(i2c, wm2000->anc_download,
 187                               wm2000->anc_download_size);
 188         if (ret < 0) {
 189                 dev_err(&i2c->dev, "i2c_transfer() failed: %d\n", ret);
 190                 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 191                 return ret;
 192         }
 193         if (ret != wm2000->anc_download_size) {
 194                 dev_err(&i2c->dev, "i2c_transfer() failed, %d != %d\n",
 195                         ret, wm2000->anc_download_size);
 196                 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 197                 return -EIO;
 198         }
 199
 200         dev_dbg(&i2c->dev, "Download complete\n");
 201
 202         if (analogue) {
 203                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
 204
 205                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 206                              WM2000_MODE_ANA_SEQ_INCLUDE |
 207                              WM2000_MODE_MOUSE_ENABLE |
 208                              WM2000_MODE_THERMAL_ENABLE);
 209         } else {
 210                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 211                              WM2000_MODE_MOUSE_ENABLE |
 212                              WM2000_MODE_THERMAL_ENABLE);
 213         }
 214
 215         ret = wm2000_read(i2c, WM2000_REG_SPEECH_CLARITY);
 216         if (wm2000->speech_clarity)
 217                 ret |= WM2000_SPEECH_CLARITY;
 218         else
 219                 ret &= ~WM2000_SPEECH_CLARITY;
 220         wm2000_write(i2c, WM2000_REG_SPEECH_CLARITY, ret);
 221
 222         wm2000_write(i2c, WM2000_REG_SYS_START0, 0x33);
 223         wm2000_write(i2c, WM2000_REG_SYS_START1, 0x02);
 224
 225         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 226
 227         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 228                              WM2000_STATUS_MOUSE_ACTIVE)) {
 229                 dev_err(&i2c->dev, "Timed out waiting for device\n");
 230                 regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 231                 return -ETIMEDOUT;
 232         }
 233
 234         dev_dbg(&i2c->dev, "ANC active\n");
 235         if (analogue)
 236                 dev_dbg(&i2c->dev, "Analogue active\n");
 237         wm2000->anc_mode = ANC_ACTIVE;
 238
 239         return 0;
 240 }
 241
 242 static int wm2000_power_down(struct i2c_client *i2c, int analogue)
 243 {
 244         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 245
 246         if (analogue) {
 247                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
 248                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 249                              WM2000_MODE_ANA_SEQ_INCLUDE |
 250                              WM2000_MODE_POWER_DOWN);
 251         } else {
 252                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 253                              WM2000_MODE_POWER_DOWN);
 254         }
 255
 256         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 257                              WM2000_STATUS_POWER_DOWN_COMPLETE)) {
 258                 dev_err(&i2c->dev, "Timeout waiting for ANC power down\n");
 259                 return -ETIMEDOUT;
 260         }
 261
 262         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 263                              WM2000_ANC_ENG_IDLE)) {
 264                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 265                 return -ETIMEDOUT;
 266         }
 267
 268         regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 269
 270         dev_dbg(&i2c->dev, "powered off\n");
 271         wm2000->anc_mode = ANC_OFF;
 272
 273         return 0;
 274 }
 275
 276 static int wm2000_enter_bypass(struct i2c_client *i2c, int analogue)
 277 {
 278         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 279
 280         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 281
 282         if (analogue) {
 283                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 284                              WM2000_MODE_ANA_SEQ_INCLUDE |
 285                              WM2000_MODE_THERMAL_ENABLE |
 286                              WM2000_MODE_BYPASS_ENTRY);
 287         } else {
 288                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 289                              WM2000_MODE_THERMAL_ENABLE |
 290                              WM2000_MODE_BYPASS_ENTRY);
 291         }
 292
 293         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 294                              WM2000_STATUS_ANC_DISABLED)) {
 295                 dev_err(&i2c->dev, "Timeout waiting for ANC disable\n");
 296                 return -ETIMEDOUT;
 297         }
 298
 299         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT,
 300                              WM2000_ANC_ENG_IDLE)) {
 301                 dev_err(&i2c->dev, "Timeout waiting for ANC engine idle\n");
 302                 return -ETIMEDOUT;
 303         }
 304
 305         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 306         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 307
 308         wm2000->anc_mode = ANC_BYPASS;
 309         dev_dbg(&i2c->dev, "bypass enabled\n");
 310
 311         return 0;
 312 }
 313
 314 static int wm2000_exit_bypass(struct i2c_client *i2c, int analogue)
 315 {
 316         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 317
 318         BUG_ON(wm2000->anc_mode != ANC_BYPASS);
 319
 320         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 321
 322         if (analogue) {
 323                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 324                              WM2000_MODE_ANA_SEQ_INCLUDE |
 325                              WM2000_MODE_MOUSE_ENABLE |
 326                              WM2000_MODE_THERMAL_ENABLE);
 327         } else {
 328                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 329                              WM2000_MODE_MOUSE_ENABLE |
 330                              WM2000_MODE_THERMAL_ENABLE);
 331         }
 332
 333         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 334         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 335
 336         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 337                              WM2000_STATUS_MOUSE_ACTIVE)) {
 338                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 339                 return -ETIMEDOUT;
 340         }
 341
 342         wm2000->anc_mode = ANC_ACTIVE;
 343         dev_dbg(&i2c->dev, "MOUSE active\n");
 344
 345         return 0;
 346 }
 347
 348 static int wm2000_enter_standby(struct i2c_client *i2c, int analogue)
 349 {
 350         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 351
 352         BUG_ON(wm2000->anc_mode != ANC_ACTIVE);
 353
 354         if (analogue) {
 355                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PD_TIME, 248 / 4);
 356
 357                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 358                              WM2000_MODE_ANA_SEQ_INCLUDE |
 359                              WM2000_MODE_THERMAL_ENABLE |
 360                              WM2000_MODE_STANDBY_ENTRY);
 361         } else {
 362                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 363                              WM2000_MODE_THERMAL_ENABLE |
 364                              WM2000_MODE_STANDBY_ENTRY);
 365         }
 366
 367         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 368                              WM2000_STATUS_ANC_DISABLED)) {
 369                 dev_err(&i2c->dev,
 370                         "Timed out waiting for ANC disable after 1ms\n");
 371                 return -ETIMEDOUT;
 372         }
 373
 374         if (!wm2000_poll_bit(i2c, WM2000_REG_ANC_STAT, WM2000_ANC_ENG_IDLE)) {
 375                 dev_err(&i2c->dev,
 376                         "Timed out waiting for standby\n");
 377                 return -ETIMEDOUT;
 378         }
 379
 380         wm2000_write(i2c, WM2000_REG_SYS_CTL1, WM2000_SYS_STBY);
 381         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_CLR);
 382
 383         wm2000->anc_mode = ANC_STANDBY;
 384         dev_dbg(&i2c->dev, "standby\n");
 385         if (analogue)
 386                 dev_dbg(&i2c->dev, "Analogue disabled\n");
 387
 388         return 0;
 389 }
 390
 391 static int wm2000_exit_standby(struct i2c_client *i2c, int analogue)
 392 {
 393         struct wm2000_priv *wm2000 = dev_get_drvdata(&i2c->dev);
 394
 395         BUG_ON(wm2000->anc_mode != ANC_STANDBY);
 396
 397         wm2000_write(i2c, WM2000_REG_SYS_CTL1, 0);
 398
 399         if (analogue) {
 400                 wm2000_write(i2c, WM2000_REG_ANA_VMID_PU_TIME, 248 / 4);
 401
 402                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 403                              WM2000_MODE_ANA_SEQ_INCLUDE |
 404                              WM2000_MODE_THERMAL_ENABLE |
 405                              WM2000_MODE_MOUSE_ENABLE);
 406         } else {
 407                 wm2000_write(i2c, WM2000_REG_SYS_MODE_CNTRL,
 408                              WM2000_MODE_THERMAL_ENABLE |
 409                              WM2000_MODE_MOUSE_ENABLE);
 410         }
 411
 412         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_RAM_SET);
 413         wm2000_write(i2c, WM2000_REG_SYS_CTL2, WM2000_ANC_INT_N_CLR);
 414
 415         if (!wm2000_poll_bit(i2c, WM2000_REG_SYS_STATUS,
 416                              WM2000_STATUS_MOUSE_ACTIVE)) {
 417                 dev_err(&i2c->dev, "Timed out waiting for MOUSE\n");
 418                 return -ETIMEDOUT;
 419         }
 420
 421         wm2000->anc_mode = ANC_ACTIVE;
 422         dev_dbg(&i2c->dev, "MOUSE active\n");
 423         if (analogue)
 424                 dev_dbg(&i2c->dev, "Analogue enabled\n");
 425
 426         return 0;
 427 }
 428
 429 typedef int (*wm2000_mode_fn)(struct i2c_client *i2c, int analogue);
 430
 431 static struct {
 432         enum wm2000_anc_mode source;
 433         enum wm2000_anc_mode dest;
 434         int analogue;
 435         wm2000_mode_fn step[2];
 436 } anc_transitions[] = {
 437         {
 438                 .source = ANC_OFF,
 439                 .dest = ANC_ACTIVE,
 440                 .analogue = 1,
 441                 .step = {
 442                         wm2000_power_up,
 443                 },
 444         },
 445         {
 446                 .source = ANC_OFF,
 447                 .dest = ANC_STANDBY,
 448                 .step = {
 449                         wm2000_power_up,
 450                         wm2000_enter_standby,
 451                 },
 452         },
 453         {
 454                 .source = ANC_OFF,
 455                 .dest = ANC_BYPASS,
 456                 .analogue = 1,
 457                 .step = {
 458                         wm2000_power_up,
 459                         wm2000_enter_bypass,
 460                 },
 461         },
 462         {
 463                 .source = ANC_ACTIVE,
 464                 .dest = ANC_BYPASS,
 465                 .analogue = 1,
 466                 .step = {
 467                         wm2000_enter_bypass,
 468                 },
 469         },
 470         {
 471                 .source = ANC_ACTIVE,
 472                 .dest = ANC_STANDBY,
 473                 .analogue = 1,
 474                 .step = {
 475                         wm2000_enter_standby,
 476                 },
 477         },
 478         {
 479                 .source = ANC_ACTIVE,
 480                 .dest = ANC_OFF,
 481                 .analogue = 1,
 482                 .step = {
 483                         wm2000_power_down,
 484                 },
 485         },
 486         {
 487                 .source = ANC_BYPASS,
 488                 .dest = ANC_ACTIVE,
 489                 .analogue = 1,
 490                 .step = {
 491                         wm2000_exit_bypass,
 492                 },
 493         },
 494         {
 495                 .source = ANC_BYPASS,
 496                 .dest = ANC_STANDBY,
 497                 .analogue = 1,
 498                 .step = {
 499                         wm2000_exit_bypass,
 500                         wm2000_enter_standby,
 501                 },
 502         },
 503         {
 504                 .source = ANC_BYPASS,
 505                 .dest = ANC_OFF,
 506                 .step = {
 507                         wm2000_exit_bypass,
 508                         wm2000_power_down,
 509                 },
 510         },
 511         {
 512                 .source = ANC_STANDBY,
 513                 .dest = ANC_ACTIVE,
 514                 .analogue = 1,
 515                 .step = {
 516                         wm2000_exit_standby,
 517                 },
 518         },
 519         {
 520                 .source = ANC_STANDBY,
 521                 .dest = ANC_BYPASS,
 522                 .analogue = 1,
 523                 .step = {
 524                         wm2000_exit_standby,
 525                         wm2000_enter_bypass,
 526                 },
 527         },
 528         {
 529                 .source = ANC_STANDBY,
 530                 .dest = ANC_OFF,
 531                 .step = {
 532                         wm2000_exit_standby,
 533                         wm2000_power_down,
 534                 },
 535         },
 536 };
 537
 538 static int wm2000_anc_transition(struct wm2000_priv *wm2000,
 539                                  enum wm2000_anc_mode mode)
 540 {
 541         struct i2c_client *i2c = wm2000->i2c;
 542         int i, j;
 543         int ret;
 544
 545         if (wm2000->anc_mode == mode)
 546                 return 0;
 547
 548         for (i = 0; i < ARRAY_SIZE(anc_transitions); i++)
 549                 if (anc_transitions[i].source == wm2000->anc_mode &&
 550                     anc_transitions[i].dest == mode)
 551                         break;
 552         if (i == ARRAY_SIZE(anc_transitions)) {
 553                 dev_err(&i2c->dev, "No transition for %d->%d\n",
 554                         wm2000->anc_mode, mode);
 555                 return -EINVAL;
 556         }
 557
 558         /* Maintain clock while active */
 559         if (anc_transitions[i].source == ANC_OFF) {
 560                 ret = clk_prepare_enable(wm2000->mclk);
 561                 if (ret != 0) {
 562                         dev_err(&i2c->dev, "Failed to enable MCLK: %d\n", ret);
 563                         return ret;
 564                 }
 565         }
 566
 567         for (j = 0; j < ARRAY_SIZE(anc_transitions[j].step); j++) {
 568                 if (!anc_transitions[i].step[j])
 569                         break;
 570                 ret = anc_transitions[i].step[j](i2c,
 571                                                  anc_transitions[i].analogue);
 572                 if (ret != 0)
 573                         return ret;
 574         }
 575
 576         if (anc_transitions[i].dest == ANC_OFF)
 577                 clk_disable_unprepare(wm2000->mclk);
 578
 579         return ret;
 580 }
 581
 582 static int wm2000_anc_set_mode(struct wm2000_priv *wm2000)
 583 {
 584         struct i2c_client *i2c = wm2000->i2c;
 585         enum wm2000_anc_mode mode;
 586
 587         if (wm2000->anc_eng_ena && wm2000->spk_ena)
 588                 if (wm2000->anc_active)
 589                         mode = ANC_ACTIVE;
 590                 else
 591                         mode = ANC_BYPASS;
 592         else
 593                 mode = ANC_STANDBY;
 594
 595         dev_dbg(&i2c->dev, "Set mode %d (enabled %d, mute %d, active %d)\n",
 596                 mode, wm2000->anc_eng_ena, !wm2000->spk_ena,
 597                 wm2000->anc_active);
 598
 599         return wm2000_anc_transition(wm2000, mode);
 600 }
 601
 602 static int wm2000_anc_mode_get(struct snd_kcontrol *kcontrol,
 603                                struct snd_ctl_elem_value *ucontrol)
 604 {
 605         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 606         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 607
 608         ucontrol->value.enumerated.item[0] = wm2000->anc_active;
 609
 610         return 0;
 611 }
 612
 613 static int wm2000_anc_mode_put(struct snd_kcontrol *kcontrol,
 614                                struct snd_ctl_elem_value *ucontrol)
 615 {
 616         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 617         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 618         int anc_active = ucontrol->value.enumerated.item[0];
 619         int ret;
 620
 621         if (anc_active > 1)
 622                 return -EINVAL;
 623
 624         mutex_lock(&wm2000->lock);
 625
 626         wm2000->anc_active = anc_active;
 627
 628         ret = wm2000_anc_set_mode(wm2000);
 629
 630         mutex_unlock(&wm2000->lock);
 631
 632         return ret;
 633 }
 634
 635 static int wm2000_speaker_get(struct snd_kcontrol *kcontrol,
 636                               struct snd_ctl_elem_value *ucontrol)
 637 {
 638         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 639         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 640
 641         ucontrol->value.enumerated.item[0] = wm2000->spk_ena;
 642
 643         return 0;
 644 }
 645
 646 static int wm2000_speaker_put(struct snd_kcontrol *kcontrol,
 647                               struct snd_ctl_elem_value *ucontrol)
 648 {
 649         struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
 650         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 651         int val = ucontrol->value.enumerated.item[0];
 652         int ret;
 653
 654         if (val > 1)
 655                 return -EINVAL;
 656
 657         mutex_lock(&wm2000->lock);
 658
 659         wm2000->spk_ena = val;
 660
 661         ret = wm2000_anc_set_mode(wm2000);
 662
 663         mutex_unlock(&wm2000->lock);
 664
 665         return ret;
 666 }
 667
 668 static const struct snd_kcontrol_new wm2000_controls[] = {
 669         SOC_SINGLE("ANC Volume", WM2000_REG_ANC_GAIN_CTRL, 0, 255, 0),
 670         SOC_SINGLE_BOOL_EXT("WM2000 ANC Switch", 0,
 671                             wm2000_anc_mode_get,
 672                             wm2000_anc_mode_put),
 673         SOC_SINGLE_BOOL_EXT("WM2000 Switch", 0,
 674                             wm2000_speaker_get,
 675                             wm2000_speaker_put),
 676 };
 677
 678 static int wm2000_anc_power_event(struct snd_soc_dapm_widget *w,
 679                                   struct snd_kcontrol *kcontrol, int event)
 680 {
 681         struct snd_soc_codec *codec = w->codec;
 682         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 683         int ret;
 684
 685         mutex_lock(&wm2000->lock);
 686
 687         if (SND_SOC_DAPM_EVENT_ON(event))
 688                 wm2000->anc_eng_ena = 1;
 689
 690         if (SND_SOC_DAPM_EVENT_OFF(event))
 691                 wm2000->anc_eng_ena = 0;
 692
 693         ret = wm2000_anc_set_mode(wm2000);
 694
 695         mutex_unlock(&wm2000->lock);
 696
 697         return ret;
 698 }
 699
 700 static const struct snd_soc_dapm_widget wm2000_dapm_widgets[] = {
 701 /* Externally visible pins */
 702 SND_SOC_DAPM_OUTPUT("SPKN"),
 703 SND_SOC_DAPM_OUTPUT("SPKP"),
 704
 705 SND_SOC_DAPM_INPUT("LINN"),
 706 SND_SOC_DAPM_INPUT("LINP"),
 707
 708 SND_SOC_DAPM_PGA_E("ANC Engine", SND_SOC_NOPM, 0, 0, NULL, 0,
 709                    wm2000_anc_power_event,
 710                    SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
 711 };
 712
 713 /* Target, Path, Source */
 714 static const struct snd_soc_dapm_route wm2000_audio_map[] = {
 715         { "SPKN", NULL, "ANC Engine" },
 716         { "SPKP", NULL, "ANC Engine" },
 717         { "ANC Engine", NULL, "LINN" },
 718         { "ANC Engine", NULL, "LINP" },
 719 };
 720
 721 #ifdef CONFIG_PM
 722 static int wm2000_suspend(struct snd_soc_codec *codec)
 723 {
 724         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 725
 726         return wm2000_anc_transition(wm2000, ANC_OFF);
 727 }
 728
 729 static int wm2000_resume(struct snd_soc_codec *codec)
 730 {
 731         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 732
 733         return wm2000_anc_set_mode(wm2000);
 734 }
 735 #else
 736 #define wm2000_suspend NULL
 737 #define wm2000_resume NULL
 738 #endif
 739
 740 static bool wm2000_readable_reg(struct device *dev, unsigned int reg)
 741 {
 742         switch (reg) {
 743         case WM2000_REG_SYS_START:
 744         case WM2000_REG_ANC_GAIN_CTRL:
 745         case WM2000_REG_MSE_TH1:
 746         case WM2000_REG_MSE_TH2:
 747         case WM2000_REG_SPEECH_CLARITY:
 748         case WM2000_REG_SYS_WATCHDOG:
 749         case WM2000_REG_ANA_VMID_PD_TIME:
 750         case WM2000_REG_ANA_VMID_PU_TIME:
 751         case WM2000_REG_CAT_FLTR_INDX:
 752         case WM2000_REG_CAT_GAIN_0:
 753         case WM2000_REG_SYS_STATUS:
 754         case WM2000_REG_SYS_MODE_CNTRL:
 755         case WM2000_REG_SYS_START0:
 756         case WM2000_REG_SYS_START1:
 757         case WM2000_REG_ID1:
 758         case WM2000_REG_ID2:
 759         case WM2000_REG_REVISON:
 760         case WM2000_REG_SYS_CTL1:
 761         case WM2000_REG_SYS_CTL2:
 762         case WM2000_REG_ANC_STAT:
 763         case WM2000_REG_IF_CTL:
 764                 return true;
 765         default:
 766                 return false;
 767         }
 768 }
 769
 770 static const struct regmap_config wm2000_regmap = {
 771         .reg_bits = 16,
 772         .val_bits = 8,
 773
 774         .max_register = WM2000_REG_IF_CTL,
 775         .readable_reg = wm2000_readable_reg,
 776 };
 777
 778 static int wm2000_probe(struct snd_soc_codec *codec)
 779 {
 780         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 781
 782         snd_soc_codec_set_cache_io(codec, 16, 8, SND_SOC_REGMAP);
 783
 784         /* This will trigger a transition to standby mode by default */
 785         wm2000_anc_set_mode(wm2000);
 786
 787         return 0;
 788 }
 789
 790 static int wm2000_remove(struct snd_soc_codec *codec)
 791 {
 792         struct wm2000_priv *wm2000 = dev_get_drvdata(codec->dev);
 793
 794         return wm2000_anc_transition(wm2000, ANC_OFF);
 795 }
 796
 797 static struct snd_soc_codec_driver soc_codec_dev_wm2000 = {
 798         .probe = wm2000_probe,
 799         .remove = wm2000_remove,
 800         .suspend = wm2000_suspend,
 801         .resume = wm2000_resume,
 802
 803         .dapm_widgets = wm2000_dapm_widgets,
 804         .num_dapm_widgets = ARRAY_SIZE(wm2000_dapm_widgets),
 805         .dapm_routes = wm2000_audio_map,
 806         .num_dapm_routes = ARRAY_SIZE(wm2000_audio_map),
 807         .controls = wm2000_controls,
 808         .num_controls = ARRAY_SIZE(wm2000_controls),
 809 };
 810
 811 static int wm2000_i2c_probe(struct i2c_client *i2c,
 812                             const struct i2c_device_id *i2c_id)
 813 {
 814         struct wm2000_priv *wm2000;
 815         struct wm2000_platform_data *pdata;
 816         const char *filename;
 817         const struct firmware *fw = NULL;
 818         int ret, i;
 819         int reg;
 820         u16 id;
 821
 822         wm2000 = devm_kzalloc(&i2c->dev, sizeof(struct wm2000_priv),
 823                               GFP_KERNEL);
 824         if (wm2000 == NULL) {
 825                 dev_err(&i2c->dev, "Unable to allocate private data\n");
 826                 return -ENOMEM;
 827         }
 828
 829         mutex_init(&wm2000->lock);
 830
 831         dev_set_drvdata(&i2c->dev, wm2000);
 832
 833         wm2000->regmap = devm_regmap_init_i2c(i2c, &wm2000_regmap);
 834         if (IS_ERR(wm2000->regmap)) {
 835                 ret = PTR_ERR(wm2000->regmap);
 836                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 837                         ret);
 838                 goto out;
 839         }
 840
 841         for (i = 0; i < WM2000_NUM_SUPPLIES; i++)
 842                 wm2000->supplies[i].supply = wm2000_supplies[i];
 843
 844         ret = devm_regulator_bulk_get(&i2c->dev, WM2000_NUM_SUPPLIES,
 845                                       wm2000->supplies);
 846         if (ret != 0) {
 847                 dev_err(&i2c->dev, "Failed to get supplies: %d\n", ret);
 848                 return ret;
 849         }
 850
 851         ret = regulator_bulk_enable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 852         if (ret != 0) {
 853                 dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
 854                 return ret;
 855         }
 856
 857         /* Verify that this is a WM2000 */
 858         reg = wm2000_read(i2c, WM2000_REG_ID1);
 859         id = reg << 8;
 860         reg = wm2000_read(i2c, WM2000_REG_ID2);
 861         id |= reg & 0xff;
 862
 863         if (id != 0x2000) {
 864                 dev_err(&i2c->dev, "Device is not a WM2000 - ID %x\n", id);
 865                 ret = -ENODEV;
 866                 goto err_supplies;
 867         }
 868
 869         reg = wm2000_read(i2c, WM2000_REG_REVISON);
 870         dev_info(&i2c->dev, "revision %c\n", reg + 'A');
 871
 872         wm2000->mclk = devm_clk_get(&i2c->dev, "MCLK");
 873         if (IS_ERR(wm2000->mclk)) {
 874                 ret = PTR_ERR(wm2000->mclk);
 875                 dev_err(&i2c->dev, "Failed to get MCLK: %d\n", ret);
 876                 goto err_supplies;
 877         }
 878
 879         filename = "wm2000_anc.bin";
 880         pdata = dev_get_platdata(&i2c->dev);
 881         if (pdata) {
 882                 wm2000->speech_clarity = !pdata->speech_enh_disable;
 883
 884                 if (pdata->download_file)
 885                         filename = pdata->download_file;
 886         }
 887
 888         ret = request_firmware(&fw, filename, &i2c->dev);
 889         if (ret != 0) {
 890                 dev_err(&i2c->dev, "Failed to acquire ANC data: %d\n", ret);
 891                 goto err_supplies;
 892         }
 893
 894         /* Pre-cook the concatenation of the register address onto the image */
 895         wm2000->anc_download_size = fw->size + 2;
 896         wm2000->anc_download = devm_kzalloc(&i2c->dev,
 897                                             wm2000->anc_download_size,
 898                                             GFP_KERNEL);
 899         if (wm2000->anc_download == NULL) {
 900                 dev_err(&i2c->dev, "Out of memory\n");
 901                 ret = -ENOMEM;
 902                 goto err_supplies;
 903         }
 904
 905         wm2000->anc_download[0] = 0x80;
 906         wm2000->anc_download[1] = 0x00;
 907         memcpy(wm2000->anc_download + 2, fw->data, fw->size);
 908
 909         wm2000->anc_eng_ena = 1;
 910         wm2000->anc_active = 1;
 911         wm2000->spk_ena = 1;
 912         wm2000->i2c = i2c;
 913
 914         wm2000_reset(wm2000);
 915
 916         ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_wm2000, NULL, 0);
 917
 918 err_supplies:
 919         regulator_bulk_disable(WM2000_NUM_SUPPLIES, wm2000->supplies);
 920
 921 out:
 922         release_firmware(fw);
 923         return ret;
 924 }
 925
 926 static int wm2000_i2c_remove(struct i2c_client *i2c)
 927 {
 928         snd_soc_unregister_codec(&i2c->dev);
 929
 930         return 0;
 931 }
 932
 933 static const struct i2c_device_id wm2000_i2c_id[] = {
 934         { "wm2000", 0 },
 935         { }
 936 };
 937 MODULE_DEVICE_TABLE(i2c, wm2000_i2c_id);
 938
 939 static struct i2c_driver wm2000_i2c_driver = {
 940         .driver = {
 941                 .name = "wm2000",
 942                 .owner = THIS_MODULE,
 943         },
 944         .probe = wm2000_i2c_probe,
 945         .remove = wm2000_i2c_remove,
 946         .id_table = wm2000_i2c_id,
 947 };
 948
 949 module_i2c_driver(wm2000_i2c_driver);
 950
 951 MODULE_DESCRIPTION("ASoC WM2000 driver");
 952 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfonmicro.com>");
 953 MODULE_LICENSE("GPL");