drivers/hid/wacom_sys.c

   1 /*
   2  * drivers/input/tablet/wacom_sys.c
   3  *
   4  *  USB Wacom tablet support - system specific code
   5  */
   6
   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 as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include "wacom_wac.h"
  15 #include "wacom.h"
  16 #include <linux/input/mt.h>
  17
  18 #define WAC_MSG_RETRIES         5
  19
  20 #define WAC_CMD_WL_LED_CONTROL  0x03
  21 #define WAC_CMD_LED_CONTROL     0x20
  22 #define WAC_CMD_ICON_START      0x21
  23 #define WAC_CMD_ICON_XFER       0x23
  24 #define WAC_CMD_ICON_BT_XFER    0x26
  25 #define WAC_CMD_RETRIES         10
  26 #define WAC_CMD_DELETE_PAIRING  0x20
  27 #define WAC_CMD_UNPAIR_ALL      0xFF
  28 #define WAC_REMOTE_SERIAL_MAX_STRLEN    9
  29
  30 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  31 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  32 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
  33
  34 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  35                             size_t size, unsigned int retries)
  36 {
  37         int retval;
  38
  39         do {
  40                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  41                                 HID_REQ_GET_REPORT);
  42         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  43
  44         if (retval < 0)
  45                 hid_err(hdev, "wacom_get_report: ran out of retries "
  46                         "(last error = %d)\n", retval);
  47
  48         return retval;
  49 }
  50
  51 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  52                             size_t size, unsigned int retries)
  53 {
  54         int retval;
  55
  56         do {
  57                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  58                                 HID_REQ_SET_REPORT);
  59         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  60
  61         if (retval < 0)
  62                 hid_err(hdev, "wacom_set_report: ran out of retries "
  63                         "(last error = %d)\n", retval);
  64
  65         return retval;
  66 }
  67
  68 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  69                 u8 *raw_data, int size)
  70 {
  71         struct wacom *wacom = hid_get_drvdata(hdev);
  72
  73         if (size > WACOM_PKGLEN_MAX)
  74                 return 1;
  75
  76         memcpy(wacom->wacom_wac.data, raw_data, size);
  77
  78         wacom_wac_irq(&wacom->wacom_wac, size);
  79
  80         return 0;
  81 }
  82
  83 static int wacom_open(struct input_dev *dev)
  84 {
  85         struct wacom *wacom = input_get_drvdata(dev);
  86
  87         return hid_hw_open(wacom->hdev);
  88 }
  89
  90 static void wacom_close(struct input_dev *dev)
  91 {
  92         struct wacom *wacom = input_get_drvdata(dev);
  93
  94         hid_hw_close(wacom->hdev);
  95 }
  96
  97 /*
  98  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  99  */
 100 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
 101                                unsigned unit, int exponent)
 102 {
 103         struct hid_field field = {
 104                 .logical_maximum = logical_extents,
 105                 .physical_maximum = physical_extents,
 106                 .unit = unit,
 107                 .unit_exponent = exponent,
 108         };
 109
 110         return hidinput_calc_abs_res(&field, ABS_X);
 111 }
 112
 113 static void wacom_feature_mapping(struct hid_device *hdev,
 114                 struct hid_field *field, struct hid_usage *usage)
 115 {
 116         struct wacom *wacom = hid_get_drvdata(hdev);
 117         struct wacom_features *features = &wacom->wacom_wac.features;
 118         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 119         u8 *data;
 120         int ret;
 121
 122         switch (usage->hid) {
 123         case HID_DG_CONTACTMAX:
 124                 /* leave touch_max as is if predefined */
 125                 if (!features->touch_max) {
 126                         /* read manually */
 127                         data = kzalloc(2, GFP_KERNEL);
 128                         if (!data)
 129                                 break;
 130                         data[0] = field->report->id;
 131                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 132                                                 data, 2, WAC_CMD_RETRIES);
 133                         if (ret == 2) {
 134                                 features->touch_max = data[1];
 135                         } else {
 136                                 features->touch_max = 16;
 137                                 hid_warn(hdev, "wacom_feature_mapping: "
 138                                          "could not get HID_DG_CONTACTMAX, "
 139                                          "defaulting to %d\n",
 140                                           features->touch_max);
 141                         }
 142                         kfree(data);
 143                 }
 144                 break;
 145         case HID_DG_INPUTMODE:
 146                 /* Ignore if value index is out of bounds. */
 147                 if (usage->usage_index >= field->report_count) {
 148                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 149                         break;
 150                 }
 151
 152                 hid_data->inputmode = field->report->id;
 153                 hid_data->inputmode_index = usage->usage_index;
 154                 break;
 155         }
 156 }
 157
 158 /*
 159  * Interface Descriptor of wacom devices can be incomplete and
 160  * inconsistent so wacom_features table is used to store stylus
 161  * device's packet lengths, various maximum values, and tablet
 162  * resolution based on product ID's.
 163  *
 164  * For devices that contain 2 interfaces, wacom_features table is
 165  * inaccurate for the touch interface.  Since the Interface Descriptor
 166  * for touch interfaces has pretty complete data, this function exists
 167  * to query tablet for this missing information instead of hard coding in
 168  * an additional table.
 169  *
 170  * A typical Interface Descriptor for a stylus will contain a
 171  * boot mouse application collection that is not of interest and this
 172  * function will ignore it.
 173  *
 174  * It also contains a digitizer application collection that also is not
 175  * of interest since any information it contains would be duplicate
 176  * of what is in wacom_features. Usually it defines a report of an array
 177  * of bytes that could be used as max length of the stylus packet returned.
 178  * If it happens to define a Digitizer-Stylus Physical Collection then
 179  * the X and Y logical values contain valid data but it is ignored.
 180  *
 181  * A typical Interface Descriptor for a touch interface will contain a
 182  * Digitizer-Finger Physical Collection which will define both logical
 183  * X/Y maximum as well as the physical size of tablet. Since touch
 184  * interfaces haven't supported pressure or distance, this is enough
 185  * information to override invalid values in the wacom_features table.
 186  *
 187  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 188  * data. We deal with them after returning from this function.
 189  */
 190 static void wacom_usage_mapping(struct hid_device *hdev,
 191                 struct hid_field *field, struct hid_usage *usage)
 192 {
 193         struct wacom *wacom = hid_get_drvdata(hdev);
 194         struct wacom_features *features = &wacom->wacom_wac.features;
 195         bool finger = WACOM_FINGER_FIELD(field);
 196         bool pen = WACOM_PEN_FIELD(field);
 197
 198         /*
 199         * Requiring Stylus Usage will ignore boot mouse
 200         * X/Y values and some cases of invalid Digitizer X/Y
 201         * values commonly reported.
 202         */
 203         if (pen)
 204                 features->device_type |= WACOM_DEVICETYPE_PEN;
 205         else if (finger)
 206                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 207         else
 208                 return;
 209
 210         /*
 211          * Bamboo models do not support HID_DG_CONTACTMAX.
 212          * And, Bamboo Pen only descriptor contains touch.
 213          */
 214         if (features->type != BAMBOO_PT) {
 215                 /* ISDv4 touch devices at least supports one touch point */
 216                 if (finger && !features->touch_max)
 217                         features->touch_max = 1;
 218         }
 219
 220         switch (usage->hid) {
 221         case HID_GD_X:
 222                 features->x_max = field->logical_maximum;
 223                 if (finger) {
 224                         features->x_phy = field->physical_maximum;
 225                         if (features->type != BAMBOO_PT) {
 226                                 features->unit = field->unit;
 227                                 features->unitExpo = field->unit_exponent;
 228                         }
 229                 }
 230                 break;
 231         case HID_GD_Y:
 232                 features->y_max = field->logical_maximum;
 233                 if (finger) {
 234                         features->y_phy = field->physical_maximum;
 235                         if (features->type != BAMBOO_PT) {
 236                                 features->unit = field->unit;
 237                                 features->unitExpo = field->unit_exponent;
 238                         }
 239                 }
 240                 break;
 241         case HID_DG_TIPPRESSURE:
 242                 if (pen)
 243                         features->pressure_max = field->logical_maximum;
 244                 break;
 245         }
 246
 247         if (features->type == HID_GENERIC)
 248                 wacom_wac_usage_mapping(hdev, field, usage);
 249 }
 250
 251 static void wacom_post_parse_hid(struct hid_device *hdev,
 252                                  struct wacom_features *features)
 253 {
 254         struct wacom *wacom = hid_get_drvdata(hdev);
 255         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 256
 257         if (features->type == HID_GENERIC) {
 258                 /* Any last-minute generic device setup */
 259                 if (features->touch_max > 1) {
 260                         input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
 261                                     INPUT_MT_DIRECT);
 262                 }
 263         }
 264 }
 265
 266 static void wacom_parse_hid(struct hid_device *hdev,
 267                            struct wacom_features *features)
 268 {
 269         struct hid_report_enum *rep_enum;
 270         struct hid_report *hreport;
 271         int i, j;
 272
 273         /* check features first */
 274         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 275         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 276                 for (i = 0; i < hreport->maxfield; i++) {
 277                         /* Ignore if report count is out of bounds. */
 278                         if (hreport->field[i]->report_count < 1)
 279                                 continue;
 280
 281                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 282                                 wacom_feature_mapping(hdev, hreport->field[i],
 283                                                 hreport->field[i]->usage + j);
 284                         }
 285                 }
 286         }
 287
 288         /* now check the input usages */
 289         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 290         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 291
 292                 if (!hreport->maxfield)
 293                         continue;
 294
 295                 for (i = 0; i < hreport->maxfield; i++)
 296                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 297                                 wacom_usage_mapping(hdev, hreport->field[i],
 298                                                 hreport->field[i]->usage + j);
 299         }
 300
 301         wacom_post_parse_hid(hdev, features);
 302 }
 303
 304 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 305 {
 306         struct wacom *wacom = hid_get_drvdata(hdev);
 307         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 308         struct hid_report *r;
 309         struct hid_report_enum *re;
 310
 311         if (hid_data->inputmode < 0)
 312                 return 0;
 313
 314         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 315         r = re->report_id_hash[hid_data->inputmode];
 316         if (r) {
 317                 r->field[0]->value[hid_data->inputmode_index] = 2;
 318                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 319         }
 320         return 0;
 321 }
 322
 323 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 324                 int length, int mode)
 325 {
 326         unsigned char *rep_data;
 327         int error = -ENOMEM, limit = 0;
 328
 329         rep_data = kzalloc(length, GFP_KERNEL);
 330         if (!rep_data)
 331                 return error;
 332
 333         do {
 334                 rep_data[0] = report_id;
 335                 rep_data[1] = mode;
 336
 337                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 338                                          length, 1);
 339                 if (error >= 0)
 340                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 341                                                  rep_data, length, 1);
 342         } while (error >= 0 && rep_data[1] != mode && limit++ < WAC_MSG_RETRIES);
 343
 344         kfree(rep_data);
 345
 346         return error < 0 ? error : 0;
 347 }
 348
 349 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 350                 struct wacom_features *features)
 351 {
 352         struct wacom *wacom = hid_get_drvdata(hdev);
 353         int ret;
 354         u8 rep_data[2];
 355
 356         switch (features->type) {
 357         case GRAPHIRE_BT:
 358                 rep_data[0] = 0x03;
 359                 rep_data[1] = 0x00;
 360                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 361                                         3);
 362
 363                 if (ret >= 0) {
 364                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 365                         rep_data[1] = 0x00;
 366
 367                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 368                                                 rep_data, 2, 3);
 369
 370                         if (ret >= 0) {
 371                                 wacom->wacom_wac.bt_high_speed = speed;
 372                                 return 0;
 373                         }
 374                 }
 375
 376                 /*
 377                  * Note that if the raw queries fail, it's not a hard failure
 378                  * and it is safe to continue
 379                  */
 380                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 381                          rep_data[0], ret);
 382                 break;
 383         case INTUOS4WL:
 384                 if (speed == 1)
 385                         wacom->wacom_wac.bt_features &= ~0x20;
 386                 else
 387                         wacom->wacom_wac.bt_features |= 0x20;
 388
 389                 rep_data[0] = 0x03;
 390                 rep_data[1] = wacom->wacom_wac.bt_features;
 391
 392                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 393                                         1);
 394                 if (ret >= 0)
 395                         wacom->wacom_wac.bt_high_speed = speed;
 396                 break;
 397         }
 398
 399         return 0;
 400 }
 401
 402 /*
 403  * Switch the tablet into its most-capable mode. Wacom tablets are
 404  * typically configured to power-up in a mode which sends mouse-like
 405  * reports to the OS. To get absolute position, pressure data, etc.
 406  * from the tablet, it is necessary to switch the tablet out of this
 407  * mode and into one which sends the full range of tablet data.
 408  */
 409 static int wacom_query_tablet_data(struct hid_device *hdev,
 410                 struct wacom_features *features)
 411 {
 412         if (hdev->bus == BUS_BLUETOOTH)
 413                 return wacom_bt_query_tablet_data(hdev, 1, features);
 414
 415         if (features->type == HID_GENERIC)
 416                 return wacom_hid_set_device_mode(hdev);
 417
 418         if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 419                 if (features->type > TABLETPC) {
 420                         /* MT Tablet PC touch */
 421                         return wacom_set_device_mode(hdev, 3, 4, 4);
 422                 }
 423                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 424                         return wacom_set_device_mode(hdev, 18, 3, 2);
 425                 }
 426                 else if (features->type == WACOM_27QHDT) {
 427                         return wacom_set_device_mode(hdev, 131, 3, 2);
 428                 }
 429                 else if (features->type == BAMBOO_PAD) {
 430                         return wacom_set_device_mode(hdev, 2, 2, 2);
 431                 }
 432         } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 433                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 434                         return wacom_set_device_mode(hdev, 2, 2, 2);
 435                 }
 436         }
 437
 438         return 0;
 439 }
 440
 441 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 442                                          struct wacom_features *features)
 443 {
 444         struct wacom *wacom = hid_get_drvdata(hdev);
 445         struct usb_interface *intf = wacom->intf;
 446
 447         /* default features */
 448         features->x_fuzz = 4;
 449         features->y_fuzz = 4;
 450         features->pressure_fuzz = 0;
 451         features->distance_fuzz = 0;
 452
 453         /*
 454          * The wireless device HID is basic and layout conflicts with
 455          * other tablets (monitor and touch interface can look like pen).
 456          * Skip the query for this type and modify defaults based on
 457          * interface number.
 458          */
 459         if (features->type == WIRELESS) {
 460                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 461                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 462                 else
 463                         features->device_type = WACOM_DEVICETYPE_NONE;
 464                 return;
 465         }
 466
 467         wacom_parse_hid(hdev, features);
 468 }
 469
 470 struct wacom_hdev_data {
 471         struct list_head list;
 472         struct kref kref;
 473         struct hid_device *dev;
 474         struct wacom_shared shared;
 475 };
 476
 477 static LIST_HEAD(wacom_udev_list);
 478 static DEFINE_MUTEX(wacom_udev_list_lock);
 479
 480 static bool wacom_are_sibling(struct hid_device *hdev,
 481                 struct hid_device *sibling)
 482 {
 483         struct wacom *wacom = hid_get_drvdata(hdev);
 484         struct wacom_features *features = &wacom->wacom_wac.features;
 485         int vid = features->oVid;
 486         int pid = features->oPid;
 487         int n1,n2;
 488
 489         if (vid == 0 && pid == 0) {
 490                 vid = hdev->vendor;
 491                 pid = hdev->product;
 492         }
 493
 494         if (vid != sibling->vendor || pid != sibling->product)
 495                 return false;
 496
 497         /* Compare the physical path. */
 498         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 499         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 500         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 501                 return false;
 502
 503         return !strncmp(hdev->phys, sibling->phys, n1);
 504 }
 505
 506 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 507 {
 508         struct wacom_hdev_data *data;
 509
 510         list_for_each_entry(data, &wacom_udev_list, list) {
 511                 if (wacom_are_sibling(hdev, data->dev)) {
 512                         kref_get(&data->kref);
 513                         return data;
 514                 }
 515         }
 516
 517         return NULL;
 518 }
 519
 520 static int wacom_add_shared_data(struct hid_device *hdev)
 521 {
 522         struct wacom *wacom = hid_get_drvdata(hdev);
 523         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 524         struct wacom_hdev_data *data;
 525         int retval = 0;
 526
 527         mutex_lock(&wacom_udev_list_lock);
 528
 529         data = wacom_get_hdev_data(hdev);
 530         if (!data) {
 531                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 532                 if (!data) {
 533                         retval = -ENOMEM;
 534                         goto out;
 535                 }
 536
 537                 kref_init(&data->kref);
 538                 data->dev = hdev;
 539                 list_add_tail(&data->list, &wacom_udev_list);
 540         }
 541
 542         wacom_wac->shared = &data->shared;
 543
 544         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 545                 wacom_wac->shared->touch = hdev;
 546         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 547                 wacom_wac->shared->pen = hdev;
 548
 549 out:
 550         mutex_unlock(&wacom_udev_list_lock);
 551         return retval;
 552 }
 553
 554 static void wacom_release_shared_data(struct kref *kref)
 555 {
 556         struct wacom_hdev_data *data =
 557                 container_of(kref, struct wacom_hdev_data, kref);
 558
 559         mutex_lock(&wacom_udev_list_lock);
 560         list_del(&data->list);
 561         mutex_unlock(&wacom_udev_list_lock);
 562
 563         kfree(data);
 564 }
 565
 566 static void wacom_remove_shared_data(struct wacom *wacom)
 567 {
 568         struct wacom_hdev_data *data;
 569         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 570
 571         if (wacom_wac->shared) {
 572                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 573                                     shared);
 574
 575                 if (wacom_wac->shared->touch == wacom->hdev)
 576                         wacom_wac->shared->touch = NULL;
 577                 else if (wacom_wac->shared->pen == wacom->hdev)
 578                         wacom_wac->shared->pen = NULL;
 579
 580                 kref_put(&data->kref, wacom_release_shared_data);
 581                 wacom_wac->shared = NULL;
 582         }
 583 }
 584
 585 static int wacom_led_control(struct wacom *wacom)
 586 {
 587         unsigned char *buf;
 588         int retval;
 589         unsigned char report_id = WAC_CMD_LED_CONTROL;
 590         int buf_size = 9;
 591
 592         if (wacom->wacom_wac.pid) { /* wireless connected */
 593                 report_id = WAC_CMD_WL_LED_CONTROL;
 594                 buf_size = 13;
 595         }
 596         buf = kzalloc(buf_size, GFP_KERNEL);
 597         if (!buf)
 598                 return -ENOMEM;
 599
 600         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 601             wacom->wacom_wac.features.type <= INTUOSPL) {
 602                 /*
 603                  * Touch Ring and crop mark LED luminance may take on
 604                  * one of four values:
 605                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 606                  */
 607                 int ring_led = wacom->led.select[0] & 0x03;
 608                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 609                 int crop_lum = 0;
 610                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 611
 612                 buf[0] = report_id;
 613                 if (wacom->wacom_wac.pid) {
 614                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 615                                          buf, buf_size, WAC_CMD_RETRIES);
 616                         buf[0] = report_id;
 617                         buf[4] = led_bits;
 618                 } else
 619                         buf[1] = led_bits;
 620         }
 621         else {
 622                 int led = wacom->led.select[0] | 0x4;
 623
 624                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 625                     wacom->wacom_wac.features.type == WACOM_24HD)
 626                         led |= (wacom->led.select[1] << 4) | 0x40;
 627
 628                 buf[0] = report_id;
 629                 buf[1] = led;
 630                 buf[2] = wacom->led.llv;
 631                 buf[3] = wacom->led.hlv;
 632                 buf[4] = wacom->led.img_lum;
 633         }
 634
 635         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 636                                   WAC_CMD_RETRIES);
 637         kfree(buf);
 638
 639         return retval;
 640 }
 641
 642 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 643                 const unsigned len, const void *img)
 644 {
 645         unsigned char *buf;
 646         int i, retval;
 647         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 648
 649         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 650         if (!buf)
 651                 return -ENOMEM;
 652
 653         /* Send 'start' command */
 654         buf[0] = WAC_CMD_ICON_START;
 655         buf[1] = 1;
 656         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 657                                   WAC_CMD_RETRIES);
 658         if (retval < 0)
 659                 goto out;
 660
 661         buf[0] = xfer_id;
 662         buf[1] = button_id & 0x07;
 663         for (i = 0; i < 4; i++) {
 664                 buf[2] = i;
 665                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 666
 667                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 668                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 669                 if (retval < 0)
 670                         break;
 671         }
 672
 673         /* Send 'stop' */
 674         buf[0] = WAC_CMD_ICON_START;
 675         buf[1] = 0;
 676         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 677                          WAC_CMD_RETRIES);
 678
 679 out:
 680         kfree(buf);
 681         return retval;
 682 }
 683
 684 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 685                                       const char *buf, size_t count)
 686 {
 687         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 688         struct wacom *wacom = hid_get_drvdata(hdev);
 689         unsigned int id;
 690         int err;
 691
 692         err = kstrtouint(buf, 10, &id);
 693         if (err)
 694                 return err;
 695
 696         mutex_lock(&wacom->lock);
 697
 698         wacom->led.select[set_id] = id & 0x3;
 699         err = wacom_led_control(wacom);
 700
 701         mutex_unlock(&wacom->lock);
 702
 703         return err < 0 ? err : count;
 704 }
 705
 706 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 707 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 708         struct device_attribute *attr, const char *buf, size_t count)   \
 709 {                                                                       \
 710         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 711 }                                                                       \
 712 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 713         struct device_attribute *attr, char *buf)                       \
 714 {                                                                       \
 715         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 716         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 717         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 718                          wacom->led.select[SET_ID]);                    \
 719 }                                                                       \
 720 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 721                     wacom_led##SET_ID##_select_show,                    \
 722                     wacom_led##SET_ID##_select_store)
 723
 724 DEVICE_LED_SELECT_ATTR(0);
 725 DEVICE_LED_SELECT_ATTR(1);
 726
 727 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 728                                      const char *buf, size_t count)
 729 {
 730         unsigned int value;
 731         int err;
 732
 733         err = kstrtouint(buf, 10, &value);
 734         if (err)
 735                 return err;
 736
 737         mutex_lock(&wacom->lock);
 738
 739         *dest = value & 0x7f;
 740         err = wacom_led_control(wacom);
 741
 742         mutex_unlock(&wacom->lock);
 743
 744         return err < 0 ? err : count;
 745 }
 746
 747 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 748 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 749         struct device_attribute *attr, const char *buf, size_t count)   \
 750 {                                                                       \
 751         struct hid_device *hdev = container_of(dev, struct hid_device, dev);\
 752         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 753                                                                         \
 754         return wacom_luminance_store(wacom, &wacom->led.field,          \
 755                                      buf, count);                       \
 756 }                                                                       \
 757 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 758         struct device_attribute *attr, char *buf)                       \
 759 {                                                                       \
 760         struct wacom *wacom = dev_get_drvdata(dev);                     \
 761         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 762 }                                                                       \
 763 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 764                    wacom_##name##_luminance_show,                       \
 765                    wacom_##name##_luminance_store)
 766
 767 DEVICE_LUMINANCE_ATTR(status0, llv);
 768 DEVICE_LUMINANCE_ATTR(status1, hlv);
 769 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 770
 771 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 772                                         const char *buf, size_t count)
 773 {
 774         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 775         struct wacom *wacom = hid_get_drvdata(hdev);
 776         int err;
 777         unsigned len;
 778         u8 xfer_id;
 779
 780         if (hdev->bus == BUS_BLUETOOTH) {
 781                 len = 256;
 782                 xfer_id = WAC_CMD_ICON_BT_XFER;
 783         } else {
 784                 len = 1024;
 785                 xfer_id = WAC_CMD_ICON_XFER;
 786         }
 787
 788         if (count != len)
 789                 return -EINVAL;
 790
 791         mutex_lock(&wacom->lock);
 792
 793         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 794
 795         mutex_unlock(&wacom->lock);
 796
 797         return err < 0 ? err : count;
 798 }
 799
 800 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 801 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 802         struct device_attribute *attr, const char *buf, size_t count)   \
 803 {                                                                       \
 804         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 805 }                                                                       \
 806 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 807                    NULL, wacom_btnimg##BUTTON_ID##_store)
 808
 809 DEVICE_BTNIMG_ATTR(0);
 810 DEVICE_BTNIMG_ATTR(1);
 811 DEVICE_BTNIMG_ATTR(2);
 812 DEVICE_BTNIMG_ATTR(3);
 813 DEVICE_BTNIMG_ATTR(4);
 814 DEVICE_BTNIMG_ATTR(5);
 815 DEVICE_BTNIMG_ATTR(6);
 816 DEVICE_BTNIMG_ATTR(7);
 817
 818 static struct attribute *cintiq_led_attrs[] = {
 819         &dev_attr_status_led0_select.attr,
 820         &dev_attr_status_led1_select.attr,
 821         NULL
 822 };
 823
 824 static struct attribute_group cintiq_led_attr_group = {
 825         .name = "wacom_led",
 826         .attrs = cintiq_led_attrs,
 827 };
 828
 829 static struct attribute *intuos4_led_attrs[] = {
 830         &dev_attr_status0_luminance.attr,
 831         &dev_attr_status1_luminance.attr,
 832         &dev_attr_status_led0_select.attr,
 833         &dev_attr_buttons_luminance.attr,
 834         &dev_attr_button0_rawimg.attr,
 835         &dev_attr_button1_rawimg.attr,
 836         &dev_attr_button2_rawimg.attr,
 837         &dev_attr_button3_rawimg.attr,
 838         &dev_attr_button4_rawimg.attr,
 839         &dev_attr_button5_rawimg.attr,
 840         &dev_attr_button6_rawimg.attr,
 841         &dev_attr_button7_rawimg.attr,
 842         NULL
 843 };
 844
 845 static struct attribute_group intuos4_led_attr_group = {
 846         .name = "wacom_led",
 847         .attrs = intuos4_led_attrs,
 848 };
 849
 850 static struct attribute *intuos5_led_attrs[] = {
 851         &dev_attr_status0_luminance.attr,
 852         &dev_attr_status_led0_select.attr,
 853         NULL
 854 };
 855
 856 static struct attribute_group intuos5_led_attr_group = {
 857         .name = "wacom_led",
 858         .attrs = intuos5_led_attrs,
 859 };
 860
 861 static int wacom_initialize_leds(struct wacom *wacom)
 862 {
 863         int error;
 864
 865         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 866                 return 0;
 867
 868         /* Initialize default values */
 869         switch (wacom->wacom_wac.features.type) {
 870         case INTUOS4S:
 871         case INTUOS4:
 872         case INTUOS4WL:
 873         case INTUOS4L:
 874                 wacom->led.select[0] = 0;
 875                 wacom->led.select[1] = 0;
 876                 wacom->led.llv = 10;
 877                 wacom->led.hlv = 20;
 878                 wacom->led.img_lum = 10;
 879                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 880                                            &intuos4_led_attr_group);
 881                 break;
 882
 883         case WACOM_24HD:
 884         case WACOM_21UX2:
 885                 wacom->led.select[0] = 0;
 886                 wacom->led.select[1] = 0;
 887                 wacom->led.llv = 0;
 888                 wacom->led.hlv = 0;
 889                 wacom->led.img_lum = 0;
 890
 891                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 892                                            &cintiq_led_attr_group);
 893                 break;
 894
 895         case INTUOS5S:
 896         case INTUOS5:
 897         case INTUOS5L:
 898         case INTUOSPS:
 899         case INTUOSPM:
 900         case INTUOSPL:
 901                 wacom->led.select[0] = 0;
 902                 wacom->led.select[1] = 0;
 903                 wacom->led.llv = 32;
 904                 wacom->led.hlv = 0;
 905                 wacom->led.img_lum = 0;
 906
 907                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 908                                           &intuos5_led_attr_group);
 909                 break;
 910
 911         default:
 912                 return 0;
 913         }
 914
 915         if (error) {
 916                 hid_err(wacom->hdev,
 917                         "cannot create sysfs group err: %d\n", error);
 918                 return error;
 919         }
 920         wacom_led_control(wacom);
 921         wacom->led_initialized = true;
 922
 923         return 0;
 924 }
 925
 926 static void wacom_destroy_leds(struct wacom *wacom)
 927 {
 928         if (!wacom->led_initialized)
 929                 return;
 930
 931         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 932                 return;
 933
 934         wacom->led_initialized = false;
 935
 936         switch (wacom->wacom_wac.features.type) {
 937         case INTUOS4S:
 938         case INTUOS4:
 939         case INTUOS4WL:
 940         case INTUOS4L:
 941                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 942                                    &intuos4_led_attr_group);
 943                 break;
 944
 945         case WACOM_24HD:
 946         case WACOM_21UX2:
 947                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 948                                    &cintiq_led_attr_group);
 949                 break;
 950
 951         case INTUOS5S:
 952         case INTUOS5:
 953         case INTUOS5L:
 954         case INTUOSPS:
 955         case INTUOSPM:
 956         case INTUOSPL:
 957                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 958                                    &intuos5_led_attr_group);
 959                 break;
 960         }
 961 }
 962
 963 static enum power_supply_property wacom_battery_props[] = {
 964         POWER_SUPPLY_PROP_PRESENT,
 965         POWER_SUPPLY_PROP_STATUS,
 966         POWER_SUPPLY_PROP_SCOPE,
 967         POWER_SUPPLY_PROP_CAPACITY
 968 };
 969
 970 static enum power_supply_property wacom_ac_props[] = {
 971         POWER_SUPPLY_PROP_PRESENT,
 972         POWER_SUPPLY_PROP_ONLINE,
 973         POWER_SUPPLY_PROP_SCOPE,
 974 };
 975
 976 static int wacom_battery_get_property(struct power_supply *psy,
 977                                       enum power_supply_property psp,
 978                                       union power_supply_propval *val)
 979 {
 980         struct wacom *wacom = power_supply_get_drvdata(psy);
 981         int ret = 0;
 982
 983         switch (psp) {
 984                 case POWER_SUPPLY_PROP_PRESENT:
 985                         val->intval = wacom->wacom_wac.bat_connected;
 986                         break;
 987                 case POWER_SUPPLY_PROP_SCOPE:
 988                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 989                         break;
 990                 case POWER_SUPPLY_PROP_CAPACITY:
 991                         val->intval =
 992                                 wacom->wacom_wac.battery_capacity;
 993                         break;
 994                 case POWER_SUPPLY_PROP_STATUS:
 995                         if (wacom->wacom_wac.bat_charging)
 996                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 997                         else if (wacom->wacom_wac.battery_capacity == 100 &&
 998                                     wacom->wacom_wac.ps_connected)
 999                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1000                         else if (wacom->wacom_wac.ps_connected)
1001                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1002                         else
1003                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1004                         break;
1005                 default:
1006                         ret = -EINVAL;
1007                         break;
1008         }
1009
1010         return ret;
1011 }
1012
1013 static int wacom_ac_get_property(struct power_supply *psy,
1014                                 enum power_supply_property psp,
1015                                 union power_supply_propval *val)
1016 {
1017         struct wacom *wacom = power_supply_get_drvdata(psy);
1018         int ret = 0;
1019
1020         switch (psp) {
1021         case POWER_SUPPLY_PROP_PRESENT:
1022                 /* fall through */
1023         case POWER_SUPPLY_PROP_ONLINE:
1024                 val->intval = wacom->wacom_wac.ps_connected;
1025                 break;
1026         case POWER_SUPPLY_PROP_SCOPE:
1027                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1028                 break;
1029         default:
1030                 ret = -EINVAL;
1031                 break;
1032         }
1033         return ret;
1034 }
1035
1036 static int wacom_initialize_battery(struct wacom *wacom)
1037 {
1038         static atomic_t battery_no = ATOMIC_INIT(0);
1039         struct power_supply_config psy_cfg = { .drv_data = wacom, };
1040         unsigned long n;
1041
1042         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
1043                 struct power_supply_desc *bat_desc = &wacom->battery_desc;
1044                 struct power_supply_desc *ac_desc = &wacom->ac_desc;
1045                 n = atomic_inc_return(&battery_no) - 1;
1046
1047                 bat_desc->properties = wacom_battery_props;
1048                 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1049                 bat_desc->get_property = wacom_battery_get_property;
1050                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
1051                 bat_desc->name = wacom->wacom_wac.bat_name;
1052                 bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1053                 bat_desc->use_for_apm = 0;
1054
1055                 ac_desc->properties = wacom_ac_props;
1056                 ac_desc->num_properties = ARRAY_SIZE(wacom_ac_props);
1057                 ac_desc->get_property = wacom_ac_get_property;
1058                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1059                 ac_desc->name = wacom->wacom_wac.ac_name;
1060                 ac_desc->type = POWER_SUPPLY_TYPE_MAINS;
1061                 ac_desc->use_for_apm = 0;
1062
1063                 wacom->battery = power_supply_register(&wacom->hdev->dev,
1064                                               &wacom->battery_desc, &psy_cfg);
1065                 if (IS_ERR(wacom->battery))
1066                         return PTR_ERR(wacom->battery);
1067
1068                 power_supply_powers(wacom->battery, &wacom->hdev->dev);
1069
1070                 wacom->ac = power_supply_register(&wacom->hdev->dev,
1071                                                   &wacom->ac_desc,
1072                                                   &psy_cfg);
1073                 if (IS_ERR(wacom->ac)) {
1074                         power_supply_unregister(wacom->battery);
1075                         return PTR_ERR(wacom->ac);
1076                 }
1077
1078                 power_supply_powers(wacom->ac, &wacom->hdev->dev);
1079         }
1080
1081         return 0;
1082 }
1083
1084 static void wacom_destroy_battery(struct wacom *wacom)
1085 {
1086         if (wacom->battery) {
1087                 power_supply_unregister(wacom->battery);
1088                 wacom->battery = NULL;
1089                 power_supply_unregister(wacom->ac);
1090                 wacom->ac = NULL;
1091         }
1092 }
1093
1094 static ssize_t wacom_show_speed(struct device *dev,
1095                                 struct device_attribute
1096                                 *attr, char *buf)
1097 {
1098         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1099         struct wacom *wacom = hid_get_drvdata(hdev);
1100
1101         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1102 }
1103
1104 static ssize_t wacom_store_speed(struct device *dev,
1105                                 struct device_attribute *attr,
1106                                 const char *buf, size_t count)
1107 {
1108         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1109         struct wacom *wacom = hid_get_drvdata(hdev);
1110         u8 new_speed;
1111
1112         if (kstrtou8(buf, 0, &new_speed))
1113                 return -EINVAL;
1114
1115         if (new_speed != 0 && new_speed != 1)
1116                 return -EINVAL;
1117
1118         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1119
1120         return count;
1121 }
1122
1123 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1124                 wacom_show_speed, wacom_store_speed);
1125
1126
1127 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1128                                       struct kobj_attribute *kattr,
1129                                       char *buf, int index)
1130 {
1131         struct device *dev = container_of(kobj->parent, struct device, kobj);
1132         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1133         struct wacom *wacom = hid_get_drvdata(hdev);
1134         u8 mode;
1135
1136         mode = wacom->led.select[index];
1137         if (mode >= 0 && mode < 3)
1138                 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1139         else
1140                 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1141 }
1142
1143 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1144 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1145                                struct kobj_attribute *kattr, char *buf) \
1146 {                                                                       \
1147         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1148 }                                                                       \
1149 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1150         .attr = {.name = "remote_mode",                                 \
1151                 .mode = DEV_ATTR_RO_PERM},                              \
1152         .show = wacom_show_remote##SET_ID##_mode,                       \
1153 };                                                                      \
1154 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1155         &remote##SET_ID##_mode_attr.attr,                               \
1156         NULL                                                            \
1157 };                                                                      \
1158 static struct attribute_group remote##SET_ID##_serial_group = {         \
1159         .name = NULL,                                                   \
1160         .attrs = remote##SET_ID##_serial_attrs,                         \
1161 }
1162
1163 DEVICE_EKR_ATTR_GROUP(0);
1164 DEVICE_EKR_ATTR_GROUP(1);
1165 DEVICE_EKR_ATTR_GROUP(2);
1166 DEVICE_EKR_ATTR_GROUP(3);
1167 DEVICE_EKR_ATTR_GROUP(4);
1168
1169 int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, int index)
1170 {
1171         int error = 0;
1172         char *buf;
1173         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1174
1175         wacom_wac->serial[index] = serial;
1176
1177         buf = kzalloc(WAC_REMOTE_SERIAL_MAX_STRLEN, GFP_KERNEL);
1178         if (!buf)
1179                 return -ENOMEM;
1180         snprintf(buf, WAC_REMOTE_SERIAL_MAX_STRLEN, "%d", serial);
1181         wacom->remote_group[index].name = buf;
1182
1183         error = sysfs_create_group(wacom->remote_dir,
1184                                    &wacom->remote_group[index]);
1185         if (error) {
1186                 hid_err(wacom->hdev,
1187                         "cannot create sysfs group err: %d\n", error);
1188                 kobject_put(wacom->remote_dir);
1189                 return error;
1190         }
1191
1192         return 0;
1193 }
1194
1195 void wacom_remote_destroy_attr_group(struct wacom *wacom, __u32 serial)
1196 {
1197         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1198         int i;
1199
1200         if (!serial)
1201                 return;
1202
1203         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1204                 if (wacom_wac->serial[i] == serial) {
1205                         wacom_wac->serial[i] = 0;
1206                         wacom->led.select[i] = WACOM_STATUS_UNKNOWN;
1207                         if (wacom->remote_group[i].name) {
1208                                 sysfs_remove_group(wacom->remote_dir,
1209                                                    &wacom->remote_group[i]);
1210                                 kfree(wacom->remote_group[i].name);
1211                                 wacom->remote_group[i].name = NULL;
1212                         }
1213                 }
1214         }
1215 }
1216
1217 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1218 {
1219         const size_t buf_size = 2;
1220         unsigned char *buf;
1221         int retval;
1222
1223         buf = kzalloc(buf_size, GFP_KERNEL);
1224         if (!buf)
1225                 return -ENOMEM;
1226
1227         buf[0] = WAC_CMD_DELETE_PAIRING;
1228         buf[1] = selector;
1229
1230         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1231                                   buf_size, WAC_CMD_RETRIES);
1232         kfree(buf);
1233
1234         return retval;
1235 }
1236
1237 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1238                                          struct kobj_attribute *attr,
1239                                          const char *buf, size_t count)
1240 {
1241         unsigned char selector = 0;
1242         struct device *dev = container_of(kobj->parent, struct device, kobj);
1243         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
1244         struct wacom *wacom = hid_get_drvdata(hdev);
1245         int err;
1246
1247         if (!strncmp(buf, "*\n", 2)) {
1248                 selector = WAC_CMD_UNPAIR_ALL;
1249         } else {
1250                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1251                          buf);
1252                 return -1;
1253         }
1254
1255         mutex_lock(&wacom->lock);
1256
1257         err = wacom_cmd_unpair_remote(wacom, selector);
1258         mutex_unlock(&wacom->lock);
1259
1260         return err < 0 ? err : count;
1261 }
1262
1263 static struct kobj_attribute unpair_remote_attr = {
1264         .attr = {.name = "unpair_remote", .mode = 0200},
1265         .store = wacom_store_unpair_remote,
1266 };
1267
1268 static const struct attribute *remote_unpair_attrs[] = {
1269         &unpair_remote_attr.attr,
1270         NULL
1271 };
1272
1273 static int wacom_initialize_remote(struct wacom *wacom)
1274 {
1275         int error = 0;
1276         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1277         int i;
1278
1279         if (wacom->wacom_wac.features.type != REMOTE)
1280                 return 0;
1281
1282         wacom->remote_group[0] = remote0_serial_group;
1283         wacom->remote_group[1] = remote1_serial_group;
1284         wacom->remote_group[2] = remote2_serial_group;
1285         wacom->remote_group[3] = remote3_serial_group;
1286         wacom->remote_group[4] = remote4_serial_group;
1287
1288         wacom->remote_dir = kobject_create_and_add("wacom_remote",
1289                                                    &wacom->hdev->dev.kobj);
1290         if (!wacom->remote_dir)
1291                 return -ENOMEM;
1292
1293         error = sysfs_create_files(wacom->remote_dir, remote_unpair_attrs);
1294
1295         if (error) {
1296                 hid_err(wacom->hdev,
1297                         "cannot create sysfs group err: %d\n", error);
1298                 return error;
1299         }
1300
1301         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1302                 wacom->led.select[i] = WACOM_STATUS_UNKNOWN;
1303                 wacom_wac->serial[i] = 0;
1304         }
1305
1306         return 0;
1307 }
1308
1309 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1310 {
1311         struct input_dev *input_dev;
1312         struct hid_device *hdev = wacom->hdev;
1313         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1314
1315         input_dev = input_allocate_device();
1316         if (!input_dev)
1317                 return NULL;
1318
1319         input_dev->name = wacom_wac->features.name;
1320         input_dev->phys = hdev->phys;
1321         input_dev->dev.parent = &hdev->dev;
1322         input_dev->open = wacom_open;
1323         input_dev->close = wacom_close;
1324         input_dev->uniq = hdev->uniq;
1325         input_dev->id.bustype = hdev->bus;
1326         input_dev->id.vendor  = hdev->vendor;
1327         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1328         input_dev->id.version = hdev->version;
1329         input_set_drvdata(input_dev, wacom);
1330
1331         return input_dev;
1332 }
1333
1334 static void wacom_clean_inputs(struct wacom *wacom)
1335 {
1336         if (wacom->wacom_wac.pen_input) {
1337                 if (wacom->wacom_wac.pen_registered)
1338                         input_unregister_device(wacom->wacom_wac.pen_input);
1339                 else
1340                         input_free_device(wacom->wacom_wac.pen_input);
1341         }
1342         if (wacom->wacom_wac.touch_input) {
1343                 if (wacom->wacom_wac.touch_registered)
1344                         input_unregister_device(wacom->wacom_wac.touch_input);
1345                 else
1346                         input_free_device(wacom->wacom_wac.touch_input);
1347         }
1348         if (wacom->wacom_wac.pad_input) {
1349                 if (wacom->wacom_wac.pad_registered)
1350                         input_unregister_device(wacom->wacom_wac.pad_input);
1351                 else
1352                         input_free_device(wacom->wacom_wac.pad_input);
1353         }
1354         if (wacom->remote_dir)
1355                 kobject_put(wacom->remote_dir);
1356         wacom->wacom_wac.pen_input = NULL;
1357         wacom->wacom_wac.touch_input = NULL;
1358         wacom->wacom_wac.pad_input = NULL;
1359         wacom_destroy_leds(wacom);
1360 }
1361
1362 static int wacom_allocate_inputs(struct wacom *wacom)
1363 {
1364         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1365
1366         wacom_wac->pen_input = wacom_allocate_input(wacom);
1367         wacom_wac->touch_input = wacom_allocate_input(wacom);
1368         wacom_wac->pad_input = wacom_allocate_input(wacom);
1369         if (!wacom_wac->pen_input || !wacom_wac->touch_input || !wacom_wac->pad_input) {
1370                 wacom_clean_inputs(wacom);
1371                 return -ENOMEM;
1372         }
1373
1374         wacom_wac->pen_input->name = wacom_wac->pen_name;
1375         wacom_wac->touch_input->name = wacom_wac->touch_name;
1376         wacom_wac->pad_input->name = wacom_wac->pad_name;
1377
1378         return 0;
1379 }
1380
1381 static int wacom_register_inputs(struct wacom *wacom)
1382 {
1383         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1384         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1385         int error = 0;
1386
1387         pen_input_dev = wacom_wac->pen_input;
1388         touch_input_dev = wacom_wac->touch_input;
1389         pad_input_dev = wacom_wac->pad_input;
1390
1391         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1392                 return -EINVAL;
1393
1394         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1395         if (error) {
1396                 /* no pen in use on this interface */
1397                 input_free_device(pen_input_dev);
1398                 wacom_wac->pen_input = NULL;
1399                 pen_input_dev = NULL;
1400         } else {
1401                 error = input_register_device(pen_input_dev);
1402                 if (error)
1403                         goto fail_register_pen_input;
1404                 wacom_wac->pen_registered = true;
1405         }
1406
1407         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1408         if (error) {
1409                 /* no touch in use on this interface */
1410                 input_free_device(touch_input_dev);
1411                 wacom_wac->touch_input = NULL;
1412                 touch_input_dev = NULL;
1413         } else {
1414                 error = input_register_device(touch_input_dev);
1415                 if (error)
1416                         goto fail_register_touch_input;
1417                 wacom_wac->touch_registered = true;
1418         }
1419
1420         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1421         if (error) {
1422                 /* no pad in use on this interface */
1423                 input_free_device(pad_input_dev);
1424                 wacom_wac->pad_input = NULL;
1425                 pad_input_dev = NULL;
1426         } else {
1427                 error = input_register_device(pad_input_dev);
1428                 if (error)
1429                         goto fail_register_pad_input;
1430                 wacom_wac->pad_registered = true;
1431
1432                 error = wacom_initialize_leds(wacom);
1433                 if (error)
1434                         goto fail_leds;
1435
1436                 error = wacom_initialize_remote(wacom);
1437                 if (error)
1438                         goto fail_remote;
1439         }
1440
1441         return 0;
1442
1443 fail_remote:
1444         wacom_destroy_leds(wacom);
1445 fail_leds:
1446         input_unregister_device(pad_input_dev);
1447         pad_input_dev = NULL;
1448         wacom_wac->pad_registered = false;
1449 fail_register_pad_input:
1450         input_unregister_device(touch_input_dev);
1451         wacom_wac->touch_input = NULL;
1452         wacom_wac->touch_registered = false;
1453 fail_register_touch_input:
1454         input_unregister_device(pen_input_dev);
1455         wacom_wac->pen_input = NULL;
1456         wacom_wac->pen_registered = false;
1457 fail_register_pen_input:
1458         return error;
1459 }
1460
1461 static void wacom_wireless_work(struct work_struct *work)
1462 {
1463         struct wacom *wacom = container_of(work, struct wacom, work);
1464         struct usb_device *usbdev = wacom->usbdev;
1465         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1466         struct hid_device *hdev1, *hdev2;
1467         struct wacom *wacom1, *wacom2;
1468         struct wacom_wac *wacom_wac1, *wacom_wac2;
1469         int error;
1470
1471         /*
1472          * Regardless if this is a disconnect or a new tablet,
1473          * remove any existing input and battery devices.
1474          */
1475
1476         wacom_destroy_battery(wacom);
1477
1478         /* Stylus interface */
1479         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1480         wacom1 = hid_get_drvdata(hdev1);
1481         wacom_wac1 = &(wacom1->wacom_wac);
1482         wacom_clean_inputs(wacom1);
1483
1484         /* Touch interface */
1485         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1486         wacom2 = hid_get_drvdata(hdev2);
1487         wacom_wac2 = &(wacom2->wacom_wac);
1488         wacom_clean_inputs(wacom2);
1489
1490         if (wacom_wac->pid == 0) {
1491                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1492                 wacom_wac1->shared->type = 0;
1493         } else {
1494                 const struct hid_device_id *id = wacom_ids;
1495
1496                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1497                          wacom_wac->pid);
1498
1499                 while (id->bus) {
1500                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1501                             id->product == wacom_wac->pid)
1502                                 break;
1503                         id++;
1504                 }
1505
1506                 if (!id->bus) {
1507                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1508                         return;
1509                 }
1510
1511                 /* Stylus interface */
1512                 wacom_wac1->features =
1513                         *((struct wacom_features *)id->driver_data);
1514                 wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PEN;
1515                 if (wacom_wac1->features.type != INTUOSHT &&
1516                     wacom_wac1->features.type != BAMBOO_PT)
1517                         wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PAD;
1518                 snprintf(wacom_wac1->pen_name, WACOM_NAME_MAX, "%s (WL) Pen",
1519                          wacom_wac1->features.name);
1520                 snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1521                          wacom_wac1->features.name);
1522                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1523                 wacom_wac1->shared->type = wacom_wac1->features.type;
1524                 wacom_wac1->pid = wacom_wac->pid;
1525                 error = wacom_allocate_inputs(wacom1) ||
1526                         wacom_register_inputs(wacom1);
1527                 if (error)
1528                         goto fail;
1529
1530                 /* Touch interface */
1531                 if (wacom_wac1->features.touch_max ||
1532                     wacom_wac1->features.type == INTUOSHT) {
1533                         wacom_wac2->features =
1534                                 *((struct wacom_features *)id->driver_data);
1535                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1536                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1537                         snprintf(wacom_wac2->touch_name, WACOM_NAME_MAX,
1538                                  "%s (WL) Finger",wacom_wac2->features.name);
1539                         snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1540                                  "%s (WL) Pad",wacom_wac2->features.name);
1541                         if (wacom_wac1->features.touch_max)
1542                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_TOUCH;
1543                         if (wacom_wac1->features.type == INTUOSHT ||
1544                             wacom_wac1->features.type == BAMBOO_PT)
1545                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_PAD;
1546                         wacom_wac2->pid = wacom_wac->pid;
1547                         error = wacom_allocate_inputs(wacom2) ||
1548                                 wacom_register_inputs(wacom2);
1549                         if (error)
1550                                 goto fail;
1551
1552                         if (wacom_wac1->features.type == INTUOSHT &&
1553                             wacom_wac1->features.touch_max)
1554                                 wacom_wac->shared->touch_input = wacom_wac2->touch_input;
1555                 }
1556
1557                 error = wacom_initialize_battery(wacom);
1558                 if (error)
1559                         goto fail;
1560         }
1561
1562         return;
1563
1564 fail:
1565         wacom_clean_inputs(wacom1);
1566         wacom_clean_inputs(wacom2);
1567         return;
1568 }
1569
1570 void wacom_battery_work(struct work_struct *work)
1571 {
1572         struct wacom *wacom = container_of(work, struct wacom, work);
1573
1574         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1575              !wacom->battery) {
1576                 wacom_initialize_battery(wacom);
1577         }
1578         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1579                  wacom->battery) {
1580                 wacom_destroy_battery(wacom);
1581         }
1582 }
1583
1584 /*
1585  * Not all devices report physical dimensions from HID.
1586  * Compute the default from hardcoded logical dimension
1587  * and resolution before driver overwrites them.
1588  */
1589 static void wacom_set_default_phy(struct wacom_features *features)
1590 {
1591         if (features->x_resolution) {
1592                 features->x_phy = (features->x_max * 100) /
1593                                         features->x_resolution;
1594                 features->y_phy = (features->y_max * 100) /
1595                                         features->y_resolution;
1596         }
1597 }
1598
1599 static void wacom_calculate_res(struct wacom_features *features)
1600 {
1601         /* set unit to "100th of a mm" for devices not reported by HID */
1602         if (!features->unit) {
1603                 features->unit = 0x11;
1604                 features->unitExpo = -3;
1605         }
1606
1607         features->x_resolution = wacom_calc_hid_res(features->x_max,
1608                                                     features->x_phy,
1609                                                     features->unit,
1610                                                     features->unitExpo);
1611         features->y_resolution = wacom_calc_hid_res(features->y_max,
1612                                                     features->y_phy,
1613                                                     features->unit,
1614                                                     features->unitExpo);
1615 }
1616
1617 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1618 {
1619         struct hid_report_enum *report_enum;
1620         struct hid_report *report;
1621         size_t size = 0;
1622
1623         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1624
1625         list_for_each_entry(report, &report_enum->report_list, list) {
1626                 size_t report_size = hid_report_len(report);
1627                 if (report_size > size)
1628                         size = report_size;
1629         }
1630
1631         return size;
1632 }
1633
1634 static void wacom_update_name(struct wacom *wacom)
1635 {
1636         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1637         struct wacom_features *features = &wacom_wac->features;
1638         char name[WACOM_NAME_MAX];
1639
1640         /* Generic devices name unspecified */
1641         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1642                 if (strstr(wacom->hdev->name, "Wacom") ||
1643                     strstr(wacom->hdev->name, "wacom") ||
1644                     strstr(wacom->hdev->name, "WACOM")) {
1645                         /* name is in HID descriptor, use it */
1646                         strlcpy(name, wacom->hdev->name, sizeof(name));
1647
1648                         /* strip out excess whitespaces */
1649                         while (1) {
1650                                 char *gap = strstr(name, "  ");
1651                                 if (gap == NULL)
1652                                         break;
1653                                 /* shift everything including the terminator */
1654                                 memmove(gap, gap+1, strlen(gap));
1655                         }
1656                         /* get rid of trailing whitespace */
1657                         if (name[strlen(name)-1] == ' ')
1658                                 name[strlen(name)-1] = '\0';
1659                 } else {
1660                         /* no meaningful name retrieved. use product ID */
1661                         snprintf(name, sizeof(name),
1662                                  "%s %X", features->name, wacom->hdev->product);
1663                 }
1664         } else {
1665                 strlcpy(name, features->name, sizeof(name));
1666         }
1667
1668         /* Append the device type to the name */
1669         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1670                 "%s Pen", name);
1671         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1672                 "%s Finger", name);
1673         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1674                 "%s Pad", name);
1675 }
1676
1677 static int wacom_probe(struct hid_device *hdev,
1678                 const struct hid_device_id *id)
1679 {
1680         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1681         struct usb_device *dev = interface_to_usbdev(intf);
1682         struct wacom *wacom;
1683         struct wacom_wac *wacom_wac;
1684         struct wacom_features *features;
1685         int error;
1686         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1687
1688         if (!id->driver_data)
1689                 return -EINVAL;
1690
1691         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1692
1693         /* hid-core sets this quirk for the boot interface */
1694         hdev->quirks &= ~HID_QUIRK_NOGET;
1695
1696         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1697         if (!wacom)
1698                 return -ENOMEM;
1699
1700         hid_set_drvdata(hdev, wacom);
1701         wacom->hdev = hdev;
1702
1703         /* ask for the report descriptor to be loaded by HID */
1704         error = hid_parse(hdev);
1705         if (error) {
1706                 hid_err(hdev, "parse failed\n");
1707                 goto fail_parse;
1708         }
1709
1710         wacom_wac = &wacom->wacom_wac;
1711         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1712         features = &wacom_wac->features;
1713         features->pktlen = wacom_compute_pktlen(hdev);
1714         if (features->pktlen > WACOM_PKGLEN_MAX) {
1715                 error = -EINVAL;
1716                 goto fail_pktlen;
1717         }
1718
1719         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1720                 error = -ENODEV;
1721                 goto fail_type;
1722         }
1723
1724         wacom->usbdev = dev;
1725         wacom->intf = intf;
1726         mutex_init(&wacom->lock);
1727         INIT_WORK(&wacom->work, wacom_wireless_work);
1728
1729         error = wacom_allocate_inputs(wacom);
1730         if (error)
1731                 goto fail_allocate_inputs;
1732
1733         /*
1734          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
1735          * into debug mode for the touch part.
1736          * We ignore the other interfaces.
1737          */
1738         if (features->type == BAMBOO_PAD) {
1739                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
1740                         features->type = HID_GENERIC;
1741                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
1742                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
1743                         error = -ENODEV;
1744                         goto fail_shared_data;
1745                 }
1746         }
1747
1748         /* set the default size in case we do not get them from hid */
1749         wacom_set_default_phy(features);
1750
1751         /* Retrieve the physical and logical size for touch devices */
1752         wacom_retrieve_hid_descriptor(hdev, features);
1753         wacom_setup_device_quirks(wacom);
1754
1755         if (features->device_type == WACOM_DEVICETYPE_NONE &&
1756             features->type != WIRELESS) {
1757                 error = features->type == HID_GENERIC ? -ENODEV : 0;
1758
1759                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
1760                          hdev->name,
1761                          error ? "Ignoring" : "Assuming pen");
1762
1763                 if (error)
1764                         goto fail_shared_data;
1765
1766                 features->device_type |= WACOM_DEVICETYPE_PEN;
1767         }
1768
1769         wacom_calculate_res(features);
1770
1771         wacom_update_name(wacom);
1772
1773         error = wacom_add_shared_data(hdev);
1774         if (error)
1775                 goto fail_shared_data;
1776
1777         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
1778              (features->quirks & WACOM_QUIRK_BATTERY)) {
1779                 error = wacom_initialize_battery(wacom);
1780                 if (error)
1781                         goto fail_battery;
1782         }
1783
1784         error = wacom_register_inputs(wacom);
1785         if (error)
1786                 goto fail_register_inputs;
1787
1788         if (hdev->bus == BUS_BLUETOOTH) {
1789                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1790                 if (error)
1791                         hid_warn(hdev,
1792                                  "can't create sysfs speed attribute err: %d\n",
1793                                  error);
1794         }
1795
1796         if (features->type == HID_GENERIC)
1797                 connect_mask |= HID_CONNECT_DRIVER;
1798
1799         /* Regular HID work starts now */
1800         error = hid_hw_start(hdev, connect_mask);
1801         if (error) {
1802                 hid_err(hdev, "hw start failed\n");
1803                 goto fail_hw_start;
1804         }
1805
1806         /* Note that if query fails it is not a hard failure */
1807         wacom_query_tablet_data(hdev, features);
1808
1809         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
1810                 error = hid_hw_open(hdev);
1811
1812         if (wacom_wac->features.type == INTUOSHT &&
1813             wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
1814                         wacom_wac->shared->touch_input = wacom_wac->touch_input;
1815         }
1816
1817         return 0;
1818
1819 fail_hw_start:
1820         if (hdev->bus == BUS_BLUETOOTH)
1821                 device_remove_file(&hdev->dev, &dev_attr_speed);
1822 fail_register_inputs:
1823         wacom_clean_inputs(wacom);
1824         wacom_destroy_battery(wacom);
1825 fail_battery:
1826         wacom_remove_shared_data(wacom);
1827 fail_shared_data:
1828         wacom_clean_inputs(wacom);
1829 fail_allocate_inputs:
1830 fail_type:
1831 fail_pktlen:
1832 fail_parse:
1833         kfree(wacom);
1834         hid_set_drvdata(hdev, NULL);
1835         return error;
1836 }
1837
1838 static void wacom_remove(struct hid_device *hdev)
1839 {
1840         struct wacom *wacom = hid_get_drvdata(hdev);
1841
1842         hid_hw_stop(hdev);
1843
1844         cancel_work_sync(&wacom->work);
1845         wacom_clean_inputs(wacom);
1846         if (hdev->bus == BUS_BLUETOOTH)
1847                 device_remove_file(&hdev->dev, &dev_attr_speed);
1848         wacom_destroy_battery(wacom);
1849         wacom_remove_shared_data(wacom);
1850
1851         hid_set_drvdata(hdev, NULL);
1852         kfree(wacom);
1853 }
1854
1855 #ifdef CONFIG_PM
1856 static int wacom_resume(struct hid_device *hdev)
1857 {
1858         struct wacom *wacom = hid_get_drvdata(hdev);
1859         struct wacom_features *features = &wacom->wacom_wac.features;
1860
1861         mutex_lock(&wacom->lock);
1862
1863         /* switch to wacom mode first */
1864         wacom_query_tablet_data(hdev, features);
1865         wacom_led_control(wacom);
1866
1867         mutex_unlock(&wacom->lock);
1868
1869         return 0;
1870 }
1871
1872 static int wacom_reset_resume(struct hid_device *hdev)
1873 {
1874         return wacom_resume(hdev);
1875 }
1876 #endif /* CONFIG_PM */
1877
1878 static struct hid_driver wacom_driver = {
1879         .name =         "wacom",
1880         .id_table =     wacom_ids,
1881         .probe =        wacom_probe,
1882         .remove =       wacom_remove,
1883         .report =       wacom_wac_report,
1884 #ifdef CONFIG_PM
1885         .resume =       wacom_resume,
1886         .reset_resume = wacom_reset_resume,
1887 #endif
1888         .raw_event =    wacom_raw_event,
1889 };
1890 module_hid_driver(wacom_driver);
1891
1892 MODULE_VERSION(DRIVER_VERSION);
1893 MODULE_AUTHOR(DRIVER_AUTHOR);
1894 MODULE_DESCRIPTION(DRIVER_DESC);
1895 MODULE_LICENSE(DRIVER_LICENSE);