drivers/input/mouse/elan_i2c_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Elan I2C/SMBus Touchpad driver - I2C interface
   4  *
   5  * Copyright (c) 2013 ELAN Microelectronics Corp.
   6  *
   7  * Author: 林政維 (Duson Lin) <dusonlin@emc.com.tw>
   8  *
   9  * Based on cyapa driver:
  10  * copyright (c) 2011-2012 Cypress Semiconductor, Inc.
  11  * copyright (c) 2011-2012 Google, Inc.
  12  *
  13  * Trademarks are the property of their respective owners.
  14  */
  15
  16 #include <linux/completion.h>
  17 #include <linux/delay.h>
  18 #include <linux/i2c.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/jiffies.h>
  21 #include <linux/kernel.h>
  22 #include <linux/sched.h>
  23 #include <asm/unaligned.h>
  24
  25 #include "elan_i2c.h"
  26
  27 /* Elan i2c commands */
  28 #define ETP_I2C_RESET                   0x0100
  29 #define ETP_I2C_WAKE_UP                 0x0800
  30 #define ETP_I2C_SLEEP                   0x0801
  31 #define ETP_I2C_DESC_CMD                0x0001
  32 #define ETP_I2C_REPORT_DESC_CMD         0x0002
  33 #define ETP_I2C_STAND_CMD               0x0005
  34 #define ETP_I2C_PATTERN_CMD             0x0100
  35 #define ETP_I2C_UNIQUEID_CMD            0x0101
  36 #define ETP_I2C_FW_VERSION_CMD          0x0102
  37 #define ETP_I2C_IC_TYPE_CMD             0x0103
  38 #define ETP_I2C_OSM_VERSION_CMD         0x0103
  39 #define ETP_I2C_NSM_VERSION_CMD         0x0104
  40 #define ETP_I2C_XY_TRACENUM_CMD         0x0105
  41 #define ETP_I2C_MAX_X_AXIS_CMD          0x0106
  42 #define ETP_I2C_MAX_Y_AXIS_CMD          0x0107
  43 #define ETP_I2C_RESOLUTION_CMD          0x0108
  44 #define ETP_I2C_PRESSURE_CMD            0x010A
  45 #define ETP_I2C_IAP_VERSION_CMD         0x0110
  46 #define ETP_I2C_SET_CMD                 0x0300
  47 #define ETP_I2C_POWER_CMD               0x0307
  48 #define ETP_I2C_FW_CHECKSUM_CMD         0x030F
  49 #define ETP_I2C_IAP_CTRL_CMD            0x0310
  50 #define ETP_I2C_IAP_CMD                 0x0311
  51 #define ETP_I2C_IAP_RESET_CMD           0x0314
  52 #define ETP_I2C_IAP_CHECKSUM_CMD        0x0315
  53 #define ETP_I2C_CALIBRATE_CMD           0x0316
  54 #define ETP_I2C_MAX_BASELINE_CMD        0x0317
  55 #define ETP_I2C_MIN_BASELINE_CMD        0x0318
  56
  57 #define ETP_I2C_REPORT_LEN              34
  58 #define ETP_I2C_DESC_LENGTH             30
  59 #define ETP_I2C_REPORT_DESC_LENGTH      158
  60 #define ETP_I2C_INF_LENGTH              2
  61 #define ETP_I2C_IAP_PASSWORD            0x1EA5
  62 #define ETP_I2C_IAP_RESET               0xF0F0
  63 #define ETP_I2C_MAIN_MODE_ON            (1 << 9)
  64 #define ETP_I2C_IAP_REG_L               0x01
  65 #define ETP_I2C_IAP_REG_H               0x06
  66
  67 static int elan_i2c_read_block(struct i2c_client *client,
  68                                u16 reg, u8 *val, u16 len)
  69 {
  70         __le16 buf[] = {
  71                 cpu_to_le16(reg),
  72         };
  73         struct i2c_msg msgs[] = {
  74                 {
  75                         .addr = client->addr,
  76                         .flags = client->flags & I2C_M_TEN,
  77                         .len = sizeof(buf),
  78                         .buf = (u8 *)buf,
  79                 },
  80                 {
  81                         .addr = client->addr,
  82                         .flags = (client->flags & I2C_M_TEN) | I2C_M_RD,
  83                         .len = len,
  84                         .buf = val,
  85                 }
  86         };
  87         int ret;
  88
  89         ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
  90         return ret == ARRAY_SIZE(msgs) ? 0 : (ret < 0 ? ret : -EIO);
  91 }
  92
  93 static int elan_i2c_read_cmd(struct i2c_client *client, u16 reg, u8 *val)
  94 {
  95         int retval;
  96
  97         retval = elan_i2c_read_block(client, reg, val, ETP_I2C_INF_LENGTH);
  98         if (retval < 0) {
  99                 dev_err(&client->dev, "reading cmd (0x%04x) fail.\n", reg);
 100                 return retval;
 101         }
 102
 103         return 0;
 104 }
 105
 106 static int elan_i2c_write_cmd(struct i2c_client *client, u16 reg, u16 cmd)
 107 {
 108         __le16 buf[] = {
 109                 cpu_to_le16(reg),
 110                 cpu_to_le16(cmd),
 111         };
 112         struct i2c_msg msg = {
 113                 .addr = client->addr,
 114                 .flags = client->flags & I2C_M_TEN,
 115                 .len = sizeof(buf),
 116                 .buf = (u8 *)buf,
 117         };
 118         int ret;
 119
 120         ret = i2c_transfer(client->adapter, &msg, 1);
 121         if (ret != 1) {
 122                 if (ret >= 0)
 123                         ret = -EIO;
 124                 dev_err(&client->dev, "writing cmd (0x%04x) failed: %d\n",
 125                         reg, ret);
 126                 return ret;
 127         }
 128
 129         return 0;
 130 }
 131
 132 static int elan_i2c_initialize(struct i2c_client *client)
 133 {
 134         struct device *dev = &client->dev;
 135         int error;
 136         u8 val[256];
 137
 138         error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
 139         if (error) {
 140                 dev_err(dev, "device reset failed: %d\n", error);
 141                 return error;
 142         }
 143
 144         /* Wait for the device to reset */
 145         msleep(100);
 146
 147         /* get reset acknowledgement 0000 */
 148         error = i2c_master_recv(client, val, ETP_I2C_INF_LENGTH);
 149         if (error < 0) {
 150                 dev_err(dev, "failed to read reset response: %d\n", error);
 151                 return error;
 152         }
 153
 154         error = elan_i2c_read_block(client, ETP_I2C_DESC_CMD,
 155                                     val, ETP_I2C_DESC_LENGTH);
 156         if (error) {
 157                 dev_err(dev, "cannot get device descriptor: %d\n", error);
 158                 return error;
 159         }
 160
 161         error = elan_i2c_read_block(client, ETP_I2C_REPORT_DESC_CMD,
 162                                     val, ETP_I2C_REPORT_DESC_LENGTH);
 163         if (error) {
 164                 dev_err(dev, "fetching report descriptor failed.: %d\n", error);
 165                 return error;
 166         }
 167
 168         return 0;
 169 }
 170
 171 static int elan_i2c_sleep_control(struct i2c_client *client, bool sleep)
 172 {
 173         return elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD,
 174                                   sleep ? ETP_I2C_SLEEP : ETP_I2C_WAKE_UP);
 175 }
 176
 177 static int elan_i2c_power_control(struct i2c_client *client, bool enable)
 178 {
 179         u8 val[2];
 180         u16 reg;
 181         int error;
 182
 183         error = elan_i2c_read_cmd(client, ETP_I2C_POWER_CMD, val);
 184         if (error) {
 185                 dev_err(&client->dev,
 186                         "failed to read current power state: %d\n",
 187                         error);
 188                 return error;
 189         }
 190
 191         reg = le16_to_cpup((__le16 *)val);
 192         if (enable)
 193                 reg &= ~ETP_DISABLE_POWER;
 194         else
 195                 reg |= ETP_DISABLE_POWER;
 196
 197         error = elan_i2c_write_cmd(client, ETP_I2C_POWER_CMD, reg);
 198         if (error) {
 199                 dev_err(&client->dev,
 200                         "failed to write current power state: %d\n",
 201                         error);
 202                 return error;
 203         }
 204
 205         return 0;
 206 }
 207
 208 static int elan_i2c_set_mode(struct i2c_client *client, u8 mode)
 209 {
 210         return elan_i2c_write_cmd(client, ETP_I2C_SET_CMD, mode);
 211 }
 212
 213
 214 static int elan_i2c_calibrate(struct i2c_client *client)
 215 {
 216         return elan_i2c_write_cmd(client, ETP_I2C_CALIBRATE_CMD, 1);
 217 }
 218
 219 static int elan_i2c_calibrate_result(struct i2c_client *client, u8 *val)
 220 {
 221         return elan_i2c_read_block(client, ETP_I2C_CALIBRATE_CMD, val, 1);
 222 }
 223
 224 static int elan_i2c_get_baseline_data(struct i2c_client *client,
 225                                       bool max_baseline, u8 *value)
 226 {
 227         int error;
 228         u8 val[3];
 229
 230         error = elan_i2c_read_cmd(client,
 231                                   max_baseline ? ETP_I2C_MAX_BASELINE_CMD :
 232                                                  ETP_I2C_MIN_BASELINE_CMD,
 233                                   val);
 234         if (error)
 235                 return error;
 236
 237         *value = le16_to_cpup((__le16 *)val);
 238
 239         return 0;
 240 }
 241
 242 static int elan_i2c_get_pattern(struct i2c_client *client, u8 *pattern)
 243 {
 244         int error;
 245         u8 val[3];
 246
 247         error = elan_i2c_read_cmd(client, ETP_I2C_PATTERN_CMD, val);
 248         if (error) {
 249                 dev_err(&client->dev, "failed to get pattern: %d\n", error);
 250                 return error;
 251         }
 252         *pattern = val[1];
 253
 254         return 0;
 255 }
 256
 257 static int elan_i2c_get_version(struct i2c_client *client,
 258                                 bool iap, u8 *version)
 259 {
 260         int error;
 261         u8 pattern_ver;
 262         u8 val[3];
 263
 264         error = elan_i2c_get_pattern(client, &pattern_ver);
 265         if (error) {
 266                 dev_err(&client->dev, "failed to get pattern version\n");
 267                 return error;
 268         }
 269
 270         error = elan_i2c_read_cmd(client,
 271                                   iap ? ETP_I2C_IAP_VERSION_CMD :
 272                                         ETP_I2C_FW_VERSION_CMD,
 273                                   val);
 274         if (error) {
 275                 dev_err(&client->dev, "failed to get %s version: %d\n",
 276                         iap ? "IAP" : "FW", error);
 277                 return error;
 278         }
 279
 280         if (pattern_ver == 0x01)
 281                 *version = iap ? val[1] : val[0];
 282         else
 283                 *version = val[0];
 284         return 0;
 285 }
 286
 287 static int elan_i2c_get_sm_version(struct i2c_client *client,
 288                                    u16 *ic_type, u8 *version,
 289                                    u8 *clickpad)
 290 {
 291         int error;
 292         u8 pattern_ver;
 293         u8 val[3];
 294
 295         error = elan_i2c_get_pattern(client, &pattern_ver);
 296         if (error) {
 297                 dev_err(&client->dev, "failed to get pattern version\n");
 298                 return error;
 299         }
 300
 301         if (pattern_ver == 0x01) {
 302                 error = elan_i2c_read_cmd(client, ETP_I2C_IC_TYPE_CMD, val);
 303                 if (error) {
 304                         dev_err(&client->dev, "failed to get ic type: %d\n",
 305                                 error);
 306                         return error;
 307                 }
 308                 *ic_type = be16_to_cpup((__be16 *)val);
 309
 310                 error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
 311                                           val);
 312                 if (error) {
 313                         dev_err(&client->dev, "failed to get SM version: %d\n",
 314                                 error);
 315                         return error;
 316                 }
 317                 *version = val[1];
 318                 *clickpad = val[0] & 0x10;
 319         } else {
 320                 error = elan_i2c_read_cmd(client, ETP_I2C_OSM_VERSION_CMD, val);
 321                 if (error) {
 322                         dev_err(&client->dev, "failed to get SM version: %d\n",
 323                                 error);
 324                         return error;
 325                 }
 326                 *version = val[0];
 327                 *ic_type = val[1];
 328
 329                 error = elan_i2c_read_cmd(client, ETP_I2C_NSM_VERSION_CMD,
 330                                           val);
 331                 if (error) {
 332                         dev_err(&client->dev, "failed to get SM version: %d\n",
 333                                 error);
 334                         return error;
 335                 }
 336                 *clickpad = val[0] & 0x10;
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int elan_i2c_get_product_id(struct i2c_client *client, u16 *id)
 343 {
 344         int error;
 345         u8 val[3];
 346
 347         error = elan_i2c_read_cmd(client, ETP_I2C_UNIQUEID_CMD, val);
 348         if (error) {
 349                 dev_err(&client->dev, "failed to get product ID: %d\n", error);
 350                 return error;
 351         }
 352
 353         *id = le16_to_cpup((__le16 *)val);
 354         return 0;
 355 }
 356
 357 static int elan_i2c_get_checksum(struct i2c_client *client,
 358                                  bool iap, u16 *csum)
 359 {
 360         int error;
 361         u8 val[3];
 362
 363         error = elan_i2c_read_cmd(client,
 364                                   iap ? ETP_I2C_IAP_CHECKSUM_CMD :
 365                                         ETP_I2C_FW_CHECKSUM_CMD,
 366                                   val);
 367         if (error) {
 368                 dev_err(&client->dev, "failed to get %s checksum: %d\n",
 369                         iap ? "IAP" : "FW", error);
 370                 return error;
 371         }
 372
 373         *csum = le16_to_cpup((__le16 *)val);
 374         return 0;
 375 }
 376
 377 static int elan_i2c_get_max(struct i2c_client *client,
 378                             unsigned int *max_x, unsigned int *max_y)
 379 {
 380         int error;
 381         u8 val[3];
 382
 383         error = elan_i2c_read_cmd(client, ETP_I2C_MAX_X_AXIS_CMD, val);
 384         if (error) {
 385                 dev_err(&client->dev, "failed to get X dimension: %d\n", error);
 386                 return error;
 387         }
 388
 389         *max_x = le16_to_cpup((__le16 *)val) & 0x0fff;
 390
 391         error = elan_i2c_read_cmd(client, ETP_I2C_MAX_Y_AXIS_CMD, val);
 392         if (error) {
 393                 dev_err(&client->dev, "failed to get Y dimension: %d\n", error);
 394                 return error;
 395         }
 396
 397         *max_y = le16_to_cpup((__le16 *)val) & 0x0fff;
 398
 399         return 0;
 400 }
 401
 402 static int elan_i2c_get_resolution(struct i2c_client *client,
 403                                    u8 *hw_res_x, u8 *hw_res_y)
 404 {
 405         int error;
 406         u8 val[3];
 407
 408         error = elan_i2c_read_cmd(client, ETP_I2C_RESOLUTION_CMD, val);
 409         if (error) {
 410                 dev_err(&client->dev, "failed to get resolution: %d\n", error);
 411                 return error;
 412         }
 413
 414         *hw_res_x = val[0];
 415         *hw_res_y = val[1];
 416
 417         return 0;
 418 }
 419
 420 static int elan_i2c_get_num_traces(struct i2c_client *client,
 421                                    unsigned int *x_traces,
 422                                    unsigned int *y_traces)
 423 {
 424         int error;
 425         u8 val[3];
 426
 427         error = elan_i2c_read_cmd(client, ETP_I2C_XY_TRACENUM_CMD, val);
 428         if (error) {
 429                 dev_err(&client->dev, "failed to get trace info: %d\n", error);
 430                 return error;
 431         }
 432
 433         *x_traces = val[0];
 434         *y_traces = val[1];
 435
 436         return 0;
 437 }
 438
 439 static int elan_i2c_get_pressure_adjustment(struct i2c_client *client,
 440                                             int *adjustment)
 441 {
 442         int error;
 443         u8 val[3];
 444
 445         error = elan_i2c_read_cmd(client, ETP_I2C_PRESSURE_CMD, val);
 446         if (error) {
 447                 dev_err(&client->dev, "failed to get pressure format: %d\n",
 448                         error);
 449                 return error;
 450         }
 451
 452         if ((val[0] >> 4) & 0x1)
 453                 *adjustment = 0;
 454         else
 455                 *adjustment = ETP_PRESSURE_OFFSET;
 456
 457         return 0;
 458 }
 459
 460 static int elan_i2c_iap_get_mode(struct i2c_client *client, enum tp_mode *mode)
 461 {
 462         int error;
 463         u16 constant;
 464         u8 val[3];
 465
 466         error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
 467         if (error) {
 468                 dev_err(&client->dev,
 469                         "failed to read iap control register: %d\n",
 470                         error);
 471                 return error;
 472         }
 473
 474         constant = le16_to_cpup((__le16 *)val);
 475         dev_dbg(&client->dev, "iap control reg: 0x%04x.\n", constant);
 476
 477         *mode = (constant & ETP_I2C_MAIN_MODE_ON) ? MAIN_MODE : IAP_MODE;
 478
 479         return 0;
 480 }
 481
 482 static int elan_i2c_iap_reset(struct i2c_client *client)
 483 {
 484         int error;
 485
 486         error = elan_i2c_write_cmd(client, ETP_I2C_IAP_RESET_CMD,
 487                                    ETP_I2C_IAP_RESET);
 488         if (error) {
 489                 dev_err(&client->dev, "cannot reset IC: %d\n", error);
 490                 return error;
 491         }
 492
 493         return 0;
 494 }
 495
 496 static int elan_i2c_set_flash_key(struct i2c_client *client)
 497 {
 498         int error;
 499
 500         error = elan_i2c_write_cmd(client, ETP_I2C_IAP_CMD,
 501                                    ETP_I2C_IAP_PASSWORD);
 502         if (error) {
 503                 dev_err(&client->dev, "cannot set flash key: %d\n", error);
 504                 return error;
 505         }
 506
 507         return 0;
 508 }
 509
 510 static int elan_i2c_prepare_fw_update(struct i2c_client *client)
 511 {
 512         struct device *dev = &client->dev;
 513         int error;
 514         enum tp_mode mode;
 515         u8 val[3];
 516         u16 password;
 517
 518         /* Get FW in which mode (IAP_MODE/MAIN_MODE)  */
 519         error = elan_i2c_iap_get_mode(client, &mode);
 520         if (error)
 521                 return error;
 522
 523         if (mode == IAP_MODE) {
 524                 /* Reset IC */
 525                 error = elan_i2c_iap_reset(client);
 526                 if (error)
 527                         return error;
 528
 529                 msleep(30);
 530         }
 531
 532         /* Set flash key*/
 533         error = elan_i2c_set_flash_key(client);
 534         if (error)
 535                 return error;
 536
 537         /* Wait for F/W IAP initialization */
 538         msleep(mode == MAIN_MODE ? 100 : 30);
 539
 540         /* Check if we are in IAP mode or not */
 541         error = elan_i2c_iap_get_mode(client, &mode);
 542         if (error)
 543                 return error;
 544
 545         if (mode == MAIN_MODE) {
 546                 dev_err(dev, "wrong mode: %d\n", mode);
 547                 return -EIO;
 548         }
 549
 550         /* Set flash key again */
 551         error = elan_i2c_set_flash_key(client);
 552         if (error)
 553                 return error;
 554
 555         /* Wait for F/W IAP initialization */
 556         msleep(30);
 557
 558         /* read back to check we actually enabled successfully. */
 559         error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CMD, val);
 560         if (error) {
 561                 dev_err(dev, "cannot read iap password: %d\n",
 562                         error);
 563                 return error;
 564         }
 565
 566         password = le16_to_cpup((__le16 *)val);
 567         if (password != ETP_I2C_IAP_PASSWORD) {
 568                 dev_err(dev, "wrong iap password: 0x%X\n", password);
 569                 return -EIO;
 570         }
 571
 572         return 0;
 573 }
 574
 575 static int elan_i2c_write_fw_block(struct i2c_client *client,
 576                                    const u8 *page, u16 checksum, int idx)
 577 {
 578         struct device *dev = &client->dev;
 579         u8 page_store[ETP_FW_PAGE_SIZE + 4];
 580         u8 val[3];
 581         u16 result;
 582         int ret, error;
 583
 584         page_store[0] = ETP_I2C_IAP_REG_L;
 585         page_store[1] = ETP_I2C_IAP_REG_H;
 586         memcpy(&page_store[2], page, ETP_FW_PAGE_SIZE);
 587         /* recode checksum at last two bytes */
 588         put_unaligned_le16(checksum, &page_store[ETP_FW_PAGE_SIZE + 2]);
 589
 590         ret = i2c_master_send(client, page_store, sizeof(page_store));
 591         if (ret != sizeof(page_store)) {
 592                 error = ret < 0 ? ret : -EIO;
 593                 dev_err(dev, "Failed to write page %d: %d\n", idx, error);
 594                 return error;
 595         }
 596
 597         /* Wait for F/W to update one page ROM data. */
 598         msleep(35);
 599
 600         error = elan_i2c_read_cmd(client, ETP_I2C_IAP_CTRL_CMD, val);
 601         if (error) {
 602                 dev_err(dev, "Failed to read IAP write result: %d\n", error);
 603                 return error;
 604         }
 605
 606         result = le16_to_cpup((__le16 *)val);
 607         if (result & (ETP_FW_IAP_PAGE_ERR | ETP_FW_IAP_INTF_ERR)) {
 608                 dev_err(dev, "IAP reports failed write: %04hx\n",
 609                         result);
 610                 return -EIO;
 611         }
 612
 613         return 0;
 614 }
 615
 616 static int elan_i2c_finish_fw_update(struct i2c_client *client,
 617                                      struct completion *completion)
 618 {
 619         struct device *dev = &client->dev;
 620         int error;
 621         int len;
 622         u8 buffer[ETP_I2C_REPORT_LEN];
 623
 624         len = i2c_master_recv(client, buffer, ETP_I2C_REPORT_LEN);
 625         if (len != ETP_I2C_REPORT_LEN) {
 626                 error = len < 0 ? len : -EIO;
 627                 dev_warn(dev, "failed to read I2C data after FW WDT reset: %d (%d)\n",
 628                         error, len);
 629         }
 630
 631         reinit_completion(completion);
 632         enable_irq(client->irq);
 633
 634         error = elan_i2c_write_cmd(client, ETP_I2C_STAND_CMD, ETP_I2C_RESET);
 635         if (error) {
 636                 dev_err(dev, "device reset failed: %d\n", error);
 637         } else if (!wait_for_completion_timeout(completion,
 638                                                 msecs_to_jiffies(300))) {
 639                 dev_err(dev, "timeout waiting for device reset\n");
 640                 error = -ETIMEDOUT;
 641         }
 642
 643         disable_irq(client->irq);
 644
 645         if (error)
 646                 return error;
 647
 648         len = i2c_master_recv(client, buffer, ETP_I2C_INF_LENGTH);
 649         if (len != ETP_I2C_INF_LENGTH) {
 650                 error = len < 0 ? len : -EIO;
 651                 dev_err(dev, "failed to read INT signal: %d (%d)\n",
 652                         error, len);
 653                 return error;
 654         }
 655
 656         return 0;
 657 }
 658
 659 static int elan_i2c_get_report(struct i2c_client *client, u8 *report)
 660 {
 661         int len;
 662
 663         len = i2c_master_recv(client, report, ETP_I2C_REPORT_LEN);
 664         if (len < 0) {
 665                 dev_err(&client->dev, "failed to read report data: %d\n", len);
 666                 return len;
 667         }
 668
 669         if (len != ETP_I2C_REPORT_LEN) {
 670                 dev_err(&client->dev,
 671                         "wrong report length (%d vs %d expected)\n",
 672                         len, ETP_I2C_REPORT_LEN);
 673                 return -EIO;
 674         }
 675
 676         return 0;
 677 }
 678
 679 const struct elan_transport_ops elan_i2c_ops = {
 680         .initialize             = elan_i2c_initialize,
 681         .sleep_control          = elan_i2c_sleep_control,
 682         .power_control          = elan_i2c_power_control,
 683         .set_mode               = elan_i2c_set_mode,
 684
 685         .calibrate              = elan_i2c_calibrate,
 686         .calibrate_result       = elan_i2c_calibrate_result,
 687
 688         .get_baseline_data      = elan_i2c_get_baseline_data,
 689
 690         .get_version            = elan_i2c_get_version,
 691         .get_sm_version         = elan_i2c_get_sm_version,
 692         .get_product_id         = elan_i2c_get_product_id,
 693         .get_checksum           = elan_i2c_get_checksum,
 694         .get_pressure_adjustment = elan_i2c_get_pressure_adjustment,
 695
 696         .get_max                = elan_i2c_get_max,
 697         .get_resolution         = elan_i2c_get_resolution,
 698         .get_num_traces         = elan_i2c_get_num_traces,
 699
 700         .iap_get_mode           = elan_i2c_iap_get_mode,
 701         .iap_reset              = elan_i2c_iap_reset,
 702
 703         .prepare_fw_update      = elan_i2c_prepare_fw_update,
 704         .write_fw_block         = elan_i2c_write_fw_block,
 705         .finish_fw_update       = elan_i2c_finish_fw_update,
 706
 707         .get_pattern            = elan_i2c_get_pattern,
 708
 709         .get_report             = elan_i2c_get_report,
 710 };