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 #define WAC_CMD_RETRIES         10
  20
  21 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  22 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  23 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
  24
  25 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  26                             size_t size, unsigned int retries)
  27 {
  28         int retval;
  29
  30         do {
  31                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  32                                 HID_REQ_GET_REPORT);
  33         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  34
  35         if (retval < 0)
  36                 hid_err(hdev, "wacom_get_report: ran out of retries "
  37                         "(last error = %d)\n", retval);
  38
  39         return retval;
  40 }
  41
  42 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  43                             size_t size, unsigned int retries)
  44 {
  45         int retval;
  46
  47         do {
  48                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  49                                 HID_REQ_SET_REPORT);
  50         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  51
  52         if (retval < 0)
  53                 hid_err(hdev, "wacom_set_report: ran out of retries "
  54                         "(last error = %d)\n", retval);
  55
  56         return retval;
  57 }
  58
  59 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  60                 u8 *raw_data, int size)
  61 {
  62         struct wacom *wacom = hid_get_drvdata(hdev);
  63
  64         if (size > WACOM_PKGLEN_MAX)
  65                 return 1;
  66
  67         memcpy(wacom->wacom_wac.data, raw_data, size);
  68
  69         wacom_wac_irq(&wacom->wacom_wac, size);
  70
  71         return 0;
  72 }
  73
  74 static int wacom_open(struct input_dev *dev)
  75 {
  76         struct wacom *wacom = input_get_drvdata(dev);
  77
  78         return hid_hw_open(wacom->hdev);
  79 }
  80
  81 static void wacom_close(struct input_dev *dev)
  82 {
  83         struct wacom *wacom = input_get_drvdata(dev);
  84
  85         /*
  86          * wacom->hdev should never be null, but surprisingly, I had the case
  87          * once while unplugging the Wacom Wireless Receiver.
  88          */
  89         if (wacom->hdev)
  90                 hid_hw_close(wacom->hdev);
  91 }
  92
  93 /*
  94  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  95  */
  96 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
  97                                unsigned unit, int exponent)
  98 {
  99         struct hid_field field = {
 100                 .logical_maximum = logical_extents,
 101                 .physical_maximum = physical_extents,
 102                 .unit = unit,
 103                 .unit_exponent = exponent,
 104         };
 105
 106         return hidinput_calc_abs_res(&field, ABS_X);
 107 }
 108
 109 static void wacom_feature_mapping(struct hid_device *hdev,
 110                 struct hid_field *field, struct hid_usage *usage)
 111 {
 112         struct wacom *wacom = hid_get_drvdata(hdev);
 113         struct wacom_features *features = &wacom->wacom_wac.features;
 114         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 115         unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
 116         u8 *data;
 117         int ret;
 118         int n;
 119
 120         switch (equivalent_usage) {
 121         case HID_DG_CONTACTMAX:
 122                 /* leave touch_max as is if predefined */
 123                 if (!features->touch_max) {
 124                         /* read manually */
 125                         data = kzalloc(2, GFP_KERNEL);
 126                         if (!data)
 127                                 break;
 128                         data[0] = field->report->id;
 129                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 130                                                 data, 2, WAC_CMD_RETRIES);
 131                         if (ret == 2) {
 132                                 features->touch_max = data[1];
 133                         } else {
 134                                 features->touch_max = 16;
 135                                 hid_warn(hdev, "wacom_feature_mapping: "
 136                                          "could not get HID_DG_CONTACTMAX, "
 137                                          "defaulting to %d\n",
 138                                           features->touch_max);
 139                         }
 140                         kfree(data);
 141                 }
 142                 break;
 143         case HID_DG_INPUTMODE:
 144                 /* Ignore if value index is out of bounds. */
 145                 if (usage->usage_index >= field->report_count) {
 146                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 147                         break;
 148                 }
 149
 150                 hid_data->inputmode = field->report->id;
 151                 hid_data->inputmode_index = usage->usage_index;
 152                 break;
 153
 154         case HID_UP_DIGITIZER:
 155                 if (field->report->id == 0x0B &&
 156                     (field->application == WACOM_HID_G9_PEN ||
 157                      field->application == WACOM_HID_G11_PEN)) {
 158                         wacom->wacom_wac.mode_report = field->report->id;
 159                         wacom->wacom_wac.mode_value = 0;
 160                 }
 161                 break;
 162
 163         case WACOM_HID_WD_DATAMODE:
 164                 wacom->wacom_wac.mode_report = field->report->id;
 165                 wacom->wacom_wac.mode_value = 2;
 166                 break;
 167
 168         case WACOM_HID_UP_G9:
 169         case WACOM_HID_UP_G11:
 170                 if (field->report->id == 0x03 &&
 171                     (field->application == WACOM_HID_G9_TOUCHSCREEN ||
 172                      field->application == WACOM_HID_G11_TOUCHSCREEN)) {
 173                         wacom->wacom_wac.mode_report = field->report->id;
 174                         wacom->wacom_wac.mode_value = 0;
 175                 }
 176                 break;
 177         case WACOM_HID_WD_OFFSETLEFT:
 178         case WACOM_HID_WD_OFFSETTOP:
 179         case WACOM_HID_WD_OFFSETRIGHT:
 180         case WACOM_HID_WD_OFFSETBOTTOM:
 181                 /* read manually */
 182                 n = hid_report_len(field->report);
 183                 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
 184                 if (!data)
 185                         break;
 186                 data[0] = field->report->id;
 187                 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 188                                         data, n, WAC_CMD_RETRIES);
 189                 if (ret == n) {
 190                         ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
 191                                                    data, n, 0);
 192                 } else {
 193                         hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
 194                                  __func__);
 195                 }
 196                 kfree(data);
 197                 break;
 198         }
 199
 200         if (hdev->vendor == USB_VENDOR_ID_WACOM &&
 201             hdev->product == 0x4200 /* Dell Canvas 27 */ &&
 202             field->application == HID_UP_MSVENDOR) {
 203                 wacom->wacom_wac.mode_report = field->report->id;
 204                 wacom->wacom_wac.mode_value = 2;
 205         }
 206 }
 207
 208 /*
 209  * Interface Descriptor of wacom devices can be incomplete and
 210  * inconsistent so wacom_features table is used to store stylus
 211  * device's packet lengths, various maximum values, and tablet
 212  * resolution based on product ID's.
 213  *
 214  * For devices that contain 2 interfaces, wacom_features table is
 215  * inaccurate for the touch interface.  Since the Interface Descriptor
 216  * for touch interfaces has pretty complete data, this function exists
 217  * to query tablet for this missing information instead of hard coding in
 218  * an additional table.
 219  *
 220  * A typical Interface Descriptor for a stylus will contain a
 221  * boot mouse application collection that is not of interest and this
 222  * function will ignore it.
 223  *
 224  * It also contains a digitizer application collection that also is not
 225  * of interest since any information it contains would be duplicate
 226  * of what is in wacom_features. Usually it defines a report of an array
 227  * of bytes that could be used as max length of the stylus packet returned.
 228  * If it happens to define a Digitizer-Stylus Physical Collection then
 229  * the X and Y logical values contain valid data but it is ignored.
 230  *
 231  * A typical Interface Descriptor for a touch interface will contain a
 232  * Digitizer-Finger Physical Collection which will define both logical
 233  * X/Y maximum as well as the physical size of tablet. Since touch
 234  * interfaces haven't supported pressure or distance, this is enough
 235  * information to override invalid values in the wacom_features table.
 236  *
 237  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 238  * data. We deal with them after returning from this function.
 239  */
 240 static void wacom_usage_mapping(struct hid_device *hdev,
 241                 struct hid_field *field, struct hid_usage *usage)
 242 {
 243         struct wacom *wacom = hid_get_drvdata(hdev);
 244         struct wacom_features *features = &wacom->wacom_wac.features;
 245         bool finger = WACOM_FINGER_FIELD(field);
 246         bool pen = WACOM_PEN_FIELD(field);
 247
 248         /*
 249         * Requiring Stylus Usage will ignore boot mouse
 250         * X/Y values and some cases of invalid Digitizer X/Y
 251         * values commonly reported.
 252         */
 253         if (pen)
 254                 features->device_type |= WACOM_DEVICETYPE_PEN;
 255         else if (finger)
 256                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 257         else
 258                 return;
 259
 260         /*
 261          * Bamboo models do not support HID_DG_CONTACTMAX.
 262          * And, Bamboo Pen only descriptor contains touch.
 263          */
 264         if (features->type > BAMBOO_PT) {
 265                 /* ISDv4 touch devices at least supports one touch point */
 266                 if (finger && !features->touch_max)
 267                         features->touch_max = 1;
 268         }
 269
 270         /*
 271          * ISDv4 devices which predate HID's adoption of the
 272          * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
 273          * position instead. We can accurately detect if a
 274          * usage with that value should be HID_DG_BARRELSWITCH2
 275          * based on the surrounding usages, which have remained
 276          * constant across generations.
 277          */
 278         if (features->type == HID_GENERIC &&
 279             usage->hid == 0x000D0000 &&
 280             field->application == HID_DG_PEN &&
 281             field->physical == HID_DG_STYLUS) {
 282                 int i = usage->usage_index;
 283
 284                 if (i-4 >= 0 && i+1 < field->maxusage &&
 285                     field->usage[i-4].hid == HID_DG_TIPSWITCH &&
 286                     field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
 287                     field->usage[i-2].hid == HID_DG_ERASER &&
 288                     field->usage[i-1].hid == HID_DG_INVERT &&
 289                     field->usage[i+1].hid == HID_DG_INRANGE) {
 290                         usage->hid = HID_DG_BARRELSWITCH2;
 291                 }
 292         }
 293
 294         switch (usage->hid) {
 295         case HID_GD_X:
 296                 features->x_max = field->logical_maximum;
 297                 if (finger) {
 298                         features->x_phy = field->physical_maximum;
 299                         if ((features->type != BAMBOO_PT) &&
 300                             (features->type != BAMBOO_TOUCH)) {
 301                                 features->unit = field->unit;
 302                                 features->unitExpo = field->unit_exponent;
 303                         }
 304                 }
 305                 break;
 306         case HID_GD_Y:
 307                 features->y_max = field->logical_maximum;
 308                 if (finger) {
 309                         features->y_phy = field->physical_maximum;
 310                         if ((features->type != BAMBOO_PT) &&
 311                             (features->type != BAMBOO_TOUCH)) {
 312                                 features->unit = field->unit;
 313                                 features->unitExpo = field->unit_exponent;
 314                         }
 315                 }
 316                 break;
 317         case HID_DG_TIPPRESSURE:
 318                 if (pen)
 319                         features->pressure_max = field->logical_maximum;
 320                 break;
 321         }
 322
 323         if (features->type == HID_GENERIC)
 324                 wacom_wac_usage_mapping(hdev, field, usage);
 325 }
 326
 327 static void wacom_post_parse_hid(struct hid_device *hdev,
 328                                  struct wacom_features *features)
 329 {
 330         struct wacom *wacom = hid_get_drvdata(hdev);
 331         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 332
 333         if (features->type == HID_GENERIC) {
 334                 /* Any last-minute generic device setup */
 335                 if (wacom_wac->has_mode_change) {
 336                         if (wacom_wac->is_direct_mode)
 337                                 features->device_type |= WACOM_DEVICETYPE_DIRECT;
 338                         else
 339                                 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
 340                 }
 341
 342                 if (features->touch_max > 1) {
 343                         if (features->device_type & WACOM_DEVICETYPE_DIRECT)
 344                                 input_mt_init_slots(wacom_wac->touch_input,
 345                                                     wacom_wac->features.touch_max,
 346                                                     INPUT_MT_DIRECT);
 347                         else
 348                                 input_mt_init_slots(wacom_wac->touch_input,
 349                                                     wacom_wac->features.touch_max,
 350                                                     INPUT_MT_POINTER);
 351                 }
 352         }
 353 }
 354
 355 static void wacom_parse_hid(struct hid_device *hdev,
 356                            struct wacom_features *features)
 357 {
 358         struct hid_report_enum *rep_enum;
 359         struct hid_report *hreport;
 360         int i, j;
 361
 362         /* check features first */
 363         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 364         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 365                 for (i = 0; i < hreport->maxfield; i++) {
 366                         /* Ignore if report count is out of bounds. */
 367                         if (hreport->field[i]->report_count < 1)
 368                                 continue;
 369
 370                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 371                                 wacom_feature_mapping(hdev, hreport->field[i],
 372                                                 hreport->field[i]->usage + j);
 373                         }
 374                 }
 375         }
 376
 377         /* now check the input usages */
 378         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 379         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 380
 381                 if (!hreport->maxfield)
 382                         continue;
 383
 384                 for (i = 0; i < hreport->maxfield; i++)
 385                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 386                                 wacom_usage_mapping(hdev, hreport->field[i],
 387                                                 hreport->field[i]->usage + j);
 388         }
 389
 390         wacom_post_parse_hid(hdev, features);
 391 }
 392
 393 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 394 {
 395         struct wacom *wacom = hid_get_drvdata(hdev);
 396         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 397         struct hid_report *r;
 398         struct hid_report_enum *re;
 399
 400         if (hid_data->inputmode < 0)
 401                 return 0;
 402
 403         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 404         r = re->report_id_hash[hid_data->inputmode];
 405         if (r) {
 406                 r->field[0]->value[hid_data->inputmode_index] = 2;
 407                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 408         }
 409         return 0;
 410 }
 411
 412 static int wacom_set_device_mode(struct hid_device *hdev,
 413                                  struct wacom_wac *wacom_wac)
 414 {
 415         u8 *rep_data;
 416         struct hid_report *r;
 417         struct hid_report_enum *re;
 418         int length;
 419         int error = -ENOMEM, limit = 0;
 420
 421         if (wacom_wac->mode_report < 0)
 422                 return 0;
 423
 424         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 425         r = re->report_id_hash[wacom_wac->mode_report];
 426         if (!r)
 427                 return -EINVAL;
 428
 429         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
 430         if (!rep_data)
 431                 return -ENOMEM;
 432
 433         length = hid_report_len(r);
 434
 435         do {
 436                 rep_data[0] = wacom_wac->mode_report;
 437                 rep_data[1] = wacom_wac->mode_value;
 438
 439                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 440                                          length, 1);
 441                 if (error >= 0)
 442                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 443                                                  rep_data, length, 1);
 444         } while (error >= 0 &&
 445                  rep_data[1] != wacom_wac->mode_report &&
 446                  limit++ < WAC_MSG_RETRIES);
 447
 448         kfree(rep_data);
 449
 450         return error < 0 ? error : 0;
 451 }
 452
 453 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 454                 struct wacom_features *features)
 455 {
 456         struct wacom *wacom = hid_get_drvdata(hdev);
 457         int ret;
 458         u8 rep_data[2];
 459
 460         switch (features->type) {
 461         case GRAPHIRE_BT:
 462                 rep_data[0] = 0x03;
 463                 rep_data[1] = 0x00;
 464                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 465                                         3);
 466
 467                 if (ret >= 0) {
 468                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 469                         rep_data[1] = 0x00;
 470
 471                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 472                                                 rep_data, 2, 3);
 473
 474                         if (ret >= 0) {
 475                                 wacom->wacom_wac.bt_high_speed = speed;
 476                                 return 0;
 477                         }
 478                 }
 479
 480                 /*
 481                  * Note that if the raw queries fail, it's not a hard failure
 482                  * and it is safe to continue
 483                  */
 484                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 485                          rep_data[0], ret);
 486                 break;
 487         case INTUOS4WL:
 488                 if (speed == 1)
 489                         wacom->wacom_wac.bt_features &= ~0x20;
 490                 else
 491                         wacom->wacom_wac.bt_features |= 0x20;
 492
 493                 rep_data[0] = 0x03;
 494                 rep_data[1] = wacom->wacom_wac.bt_features;
 495
 496                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 497                                         1);
 498                 if (ret >= 0)
 499                         wacom->wacom_wac.bt_high_speed = speed;
 500                 break;
 501         }
 502
 503         return 0;
 504 }
 505
 506 /*
 507  * Switch the tablet into its most-capable mode. Wacom tablets are
 508  * typically configured to power-up in a mode which sends mouse-like
 509  * reports to the OS. To get absolute position, pressure data, etc.
 510  * from the tablet, it is necessary to switch the tablet out of this
 511  * mode and into one which sends the full range of tablet data.
 512  */
 513 static int _wacom_query_tablet_data(struct wacom *wacom)
 514 {
 515         struct hid_device *hdev = wacom->hdev;
 516         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 517         struct wacom_features *features = &wacom_wac->features;
 518
 519         if (hdev->bus == BUS_BLUETOOTH)
 520                 return wacom_bt_query_tablet_data(hdev, 1, features);
 521
 522         if (features->type != HID_GENERIC) {
 523                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 524                         if (features->type > TABLETPC) {
 525                                 /* MT Tablet PC touch */
 526                                 wacom_wac->mode_report = 3;
 527                                 wacom_wac->mode_value = 4;
 528                         } else if (features->type == WACOM_24HDT) {
 529                                 wacom_wac->mode_report = 18;
 530                                 wacom_wac->mode_value = 2;
 531                         } else if (features->type == WACOM_27QHDT) {
 532                                 wacom_wac->mode_report = 131;
 533                                 wacom_wac->mode_value = 2;
 534                         } else if (features->type == BAMBOO_PAD) {
 535                                 wacom_wac->mode_report = 2;
 536                                 wacom_wac->mode_value = 2;
 537                         }
 538                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 539                         if (features->type <= BAMBOO_PT) {
 540                                 wacom_wac->mode_report = 2;
 541                                 wacom_wac->mode_value = 2;
 542                         }
 543                 }
 544         }
 545
 546         wacom_set_device_mode(hdev, wacom_wac);
 547
 548         if (features->type == HID_GENERIC)
 549                 return wacom_hid_set_device_mode(hdev);
 550
 551         return 0;
 552 }
 553
 554 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 555                                          struct wacom_features *features)
 556 {
 557         struct wacom *wacom = hid_get_drvdata(hdev);
 558         struct usb_interface *intf = wacom->intf;
 559
 560         /* default features */
 561         features->x_fuzz = 4;
 562         features->y_fuzz = 4;
 563         features->pressure_fuzz = 0;
 564         features->distance_fuzz = 1;
 565         features->tilt_fuzz = 1;
 566
 567         /*
 568          * The wireless device HID is basic and layout conflicts with
 569          * other tablets (monitor and touch interface can look like pen).
 570          * Skip the query for this type and modify defaults based on
 571          * interface number.
 572          */
 573         if (features->type == WIRELESS) {
 574                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 575                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 576                 else
 577                         features->device_type = WACOM_DEVICETYPE_NONE;
 578                 return;
 579         }
 580
 581         wacom_parse_hid(hdev, features);
 582 }
 583
 584 struct wacom_hdev_data {
 585         struct list_head list;
 586         struct kref kref;
 587         struct hid_device *dev;
 588         struct wacom_shared shared;
 589 };
 590
 591 static LIST_HEAD(wacom_udev_list);
 592 static DEFINE_MUTEX(wacom_udev_list_lock);
 593
 594 static bool compare_device_paths(struct hid_device *hdev_a,
 595                 struct hid_device *hdev_b, char separator)
 596 {
 597         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
 598         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
 599
 600         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 601                 return false;
 602
 603         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
 604 }
 605
 606 static bool wacom_are_sibling(struct hid_device *hdev,
 607                 struct hid_device *sibling)
 608 {
 609         struct wacom *wacom = hid_get_drvdata(hdev);
 610         struct wacom_features *features = &wacom->wacom_wac.features;
 611         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
 612         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
 613         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
 614         __u32 oPid = features->oPid ? features->oPid : hdev->product;
 615
 616         /* The defined oVid/oPid must match that of the sibling */
 617         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
 618                 return false;
 619         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
 620                 return false;
 621
 622         /*
 623          * Devices with the same VID/PID must share the same physical
 624          * device path, while those with different VID/PID must share
 625          * the same physical parent device path.
 626          */
 627         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
 628                 if (!compare_device_paths(hdev, sibling, '/'))
 629                         return false;
 630         } else {
 631                 if (!compare_device_paths(hdev, sibling, '.'))
 632                         return false;
 633         }
 634
 635         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
 636         if (features->type != HID_GENERIC)
 637                 return true;
 638
 639         /*
 640          * Direct-input devices may not be siblings of indirect-input
 641          * devices.
 642          */
 643         if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 644             !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 645                 return false;
 646
 647         /*
 648          * Indirect-input devices may not be siblings of direct-input
 649          * devices.
 650          */
 651         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 652             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 653                 return false;
 654
 655         /* Pen devices may only be siblings of touch devices */
 656         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
 657             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
 658                 return false;
 659
 660         /* Touch devices may only be siblings of pen devices */
 661         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
 662             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
 663                 return false;
 664
 665         /*
 666          * No reason could be found for these two devices to NOT be
 667          * siblings, so there's a good chance they ARE siblings
 668          */
 669         return true;
 670 }
 671
 672 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 673 {
 674         struct wacom_hdev_data *data;
 675
 676         /* Try to find an already-probed interface from the same device */
 677         list_for_each_entry(data, &wacom_udev_list, list) {
 678                 if (compare_device_paths(hdev, data->dev, '/')) {
 679                         kref_get(&data->kref);
 680                         return data;
 681                 }
 682         }
 683
 684         /* Fallback to finding devices that appear to be "siblings" */
 685         list_for_each_entry(data, &wacom_udev_list, list) {
 686                 if (wacom_are_sibling(hdev, data->dev)) {
 687                         kref_get(&data->kref);
 688                         return data;
 689                 }
 690         }
 691
 692         return NULL;
 693 }
 694
 695 static void wacom_release_shared_data(struct kref *kref)
 696 {
 697         struct wacom_hdev_data *data =
 698                 container_of(kref, struct wacom_hdev_data, kref);
 699
 700         mutex_lock(&wacom_udev_list_lock);
 701         list_del(&data->list);
 702         mutex_unlock(&wacom_udev_list_lock);
 703
 704         kfree(data);
 705 }
 706
 707 static void wacom_remove_shared_data(void *res)
 708 {
 709         struct wacom *wacom = res;
 710         struct wacom_hdev_data *data;
 711         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 712
 713         if (wacom_wac->shared) {
 714                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 715                                     shared);
 716
 717                 if (wacom_wac->shared->touch == wacom->hdev)
 718                         wacom_wac->shared->touch = NULL;
 719                 else if (wacom_wac->shared->pen == wacom->hdev)
 720                         wacom_wac->shared->pen = NULL;
 721
 722                 kref_put(&data->kref, wacom_release_shared_data);
 723                 wacom_wac->shared = NULL;
 724         }
 725 }
 726
 727 static int wacom_add_shared_data(struct hid_device *hdev)
 728 {
 729         struct wacom *wacom = hid_get_drvdata(hdev);
 730         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 731         struct wacom_hdev_data *data;
 732         int retval = 0;
 733
 734         mutex_lock(&wacom_udev_list_lock);
 735
 736         data = wacom_get_hdev_data(hdev);
 737         if (!data) {
 738                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 739                 if (!data) {
 740                         retval = -ENOMEM;
 741                         goto out;
 742                 }
 743
 744                 kref_init(&data->kref);
 745                 data->dev = hdev;
 746                 list_add_tail(&data->list, &wacom_udev_list);
 747         }
 748
 749         wacom_wac->shared = &data->shared;
 750
 751         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
 752         if (retval) {
 753                 mutex_unlock(&wacom_udev_list_lock);
 754                 wacom_remove_shared_data(wacom);
 755                 return retval;
 756         }
 757
 758         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 759                 wacom_wac->shared->touch = hdev;
 760         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 761                 wacom_wac->shared->pen = hdev;
 762
 763 out:
 764         mutex_unlock(&wacom_udev_list_lock);
 765         return retval;
 766 }
 767
 768 static int wacom_led_control(struct wacom *wacom)
 769 {
 770         unsigned char *buf;
 771         int retval;
 772         unsigned char report_id = WAC_CMD_LED_CONTROL;
 773         int buf_size = 9;
 774
 775         if (!wacom->led.groups)
 776                 return -ENOTSUPP;
 777
 778         if (wacom->wacom_wac.features.type == REMOTE)
 779                 return -ENOTSUPP;
 780
 781         if (wacom->wacom_wac.pid) { /* wireless connected */
 782                 report_id = WAC_CMD_WL_LED_CONTROL;
 783                 buf_size = 13;
 784         }
 785         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 786                 report_id = WAC_CMD_WL_INTUOSP2;
 787                 buf_size = 51;
 788         }
 789         buf = kzalloc(buf_size, GFP_KERNEL);
 790         if (!buf)
 791                 return -ENOMEM;
 792
 793         if (wacom->wacom_wac.features.type == HID_GENERIC) {
 794                 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
 795                 buf[1] = wacom->led.llv;
 796                 buf[2] = wacom->led.groups[0].select & 0x03;
 797
 798         } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
 799             wacom->wacom_wac.features.type <= INTUOSPL)) {
 800                 /*
 801                  * Touch Ring and crop mark LED luminance may take on
 802                  * one of four values:
 803                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 804                  */
 805                 int ring_led = wacom->led.groups[0].select & 0x03;
 806                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 807                 int crop_lum = 0;
 808                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 809
 810                 buf[0] = report_id;
 811                 if (wacom->wacom_wac.pid) {
 812                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 813                                          buf, buf_size, WAC_CMD_RETRIES);
 814                         buf[0] = report_id;
 815                         buf[4] = led_bits;
 816                 } else
 817                         buf[1] = led_bits;
 818         }
 819         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 820                 buf[0] = report_id;
 821                 buf[4] = 100; // Power Connection LED (ORANGE)
 822                 buf[5] = 100; // BT Connection LED (BLUE)
 823                 buf[6] = 100; // Paper Mode (RED?)
 824                 buf[7] = 100; // Paper Mode (GREEN?)
 825                 buf[8] = 100; // Paper Mode (BLUE?)
 826                 buf[9] = wacom->led.llv;
 827                 buf[10] = wacom->led.groups[0].select & 0x03;
 828         }
 829         else {
 830                 int led = wacom->led.groups[0].select | 0x4;
 831
 832                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 833                     wacom->wacom_wac.features.type == WACOM_24HD)
 834                         led |= (wacom->led.groups[1].select << 4) | 0x40;
 835
 836                 buf[0] = report_id;
 837                 buf[1] = led;
 838                 buf[2] = wacom->led.llv;
 839                 buf[3] = wacom->led.hlv;
 840                 buf[4] = wacom->led.img_lum;
 841         }
 842
 843         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 844                                   WAC_CMD_RETRIES);
 845         kfree(buf);
 846
 847         return retval;
 848 }
 849
 850 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 851                 const unsigned len, const void *img)
 852 {
 853         unsigned char *buf;
 854         int i, retval;
 855         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 856
 857         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 858         if (!buf)
 859                 return -ENOMEM;
 860
 861         /* Send 'start' command */
 862         buf[0] = WAC_CMD_ICON_START;
 863         buf[1] = 1;
 864         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 865                                   WAC_CMD_RETRIES);
 866         if (retval < 0)
 867                 goto out;
 868
 869         buf[0] = xfer_id;
 870         buf[1] = button_id & 0x07;
 871         for (i = 0; i < 4; i++) {
 872                 buf[2] = i;
 873                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 874
 875                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 876                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 877                 if (retval < 0)
 878                         break;
 879         }
 880
 881         /* Send 'stop' */
 882         buf[0] = WAC_CMD_ICON_START;
 883         buf[1] = 0;
 884         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 885                          WAC_CMD_RETRIES);
 886
 887 out:
 888         kfree(buf);
 889         return retval;
 890 }
 891
 892 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 893                                       const char *buf, size_t count)
 894 {
 895         struct hid_device *hdev = to_hid_device(dev);
 896         struct wacom *wacom = hid_get_drvdata(hdev);
 897         unsigned int id;
 898         int err;
 899
 900         err = kstrtouint(buf, 10, &id);
 901         if (err)
 902                 return err;
 903
 904         mutex_lock(&wacom->lock);
 905
 906         wacom->led.groups[set_id].select = id & 0x3;
 907         err = wacom_led_control(wacom);
 908
 909         mutex_unlock(&wacom->lock);
 910
 911         return err < 0 ? err : count;
 912 }
 913
 914 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 915 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 916         struct device_attribute *attr, const char *buf, size_t count)   \
 917 {                                                                       \
 918         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 919 }                                                                       \
 920 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 921         struct device_attribute *attr, char *buf)                       \
 922 {                                                                       \
 923         struct hid_device *hdev = to_hid_device(dev);\
 924         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 925         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 926                          wacom->led.groups[SET_ID].select);             \
 927 }                                                                       \
 928 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 929                     wacom_led##SET_ID##_select_show,                    \
 930                     wacom_led##SET_ID##_select_store)
 931
 932 DEVICE_LED_SELECT_ATTR(0);
 933 DEVICE_LED_SELECT_ATTR(1);
 934
 935 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 936                                      const char *buf, size_t count)
 937 {
 938         unsigned int value;
 939         int err;
 940
 941         err = kstrtouint(buf, 10, &value);
 942         if (err)
 943                 return err;
 944
 945         mutex_lock(&wacom->lock);
 946
 947         *dest = value & 0x7f;
 948         err = wacom_led_control(wacom);
 949
 950         mutex_unlock(&wacom->lock);
 951
 952         return err < 0 ? err : count;
 953 }
 954
 955 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 956 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 957         struct device_attribute *attr, const char *buf, size_t count)   \
 958 {                                                                       \
 959         struct hid_device *hdev = to_hid_device(dev);\
 960         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 961                                                                         \
 962         return wacom_luminance_store(wacom, &wacom->led.field,          \
 963                                      buf, count);                       \
 964 }                                                                       \
 965 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 966         struct device_attribute *attr, char *buf)                       \
 967 {                                                                       \
 968         struct wacom *wacom = dev_get_drvdata(dev);                     \
 969         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 970 }                                                                       \
 971 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 972                    wacom_##name##_luminance_show,                       \
 973                    wacom_##name##_luminance_store)
 974
 975 DEVICE_LUMINANCE_ATTR(status0, llv);
 976 DEVICE_LUMINANCE_ATTR(status1, hlv);
 977 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 978
 979 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 980                                         const char *buf, size_t count)
 981 {
 982         struct hid_device *hdev = to_hid_device(dev);
 983         struct wacom *wacom = hid_get_drvdata(hdev);
 984         int err;
 985         unsigned len;
 986         u8 xfer_id;
 987
 988         if (hdev->bus == BUS_BLUETOOTH) {
 989                 len = 256;
 990                 xfer_id = WAC_CMD_ICON_BT_XFER;
 991         } else {
 992                 len = 1024;
 993                 xfer_id = WAC_CMD_ICON_XFER;
 994         }
 995
 996         if (count != len)
 997                 return -EINVAL;
 998
 999         mutex_lock(&wacom->lock);
1000
1001         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1002
1003         mutex_unlock(&wacom->lock);
1004
1005         return err < 0 ? err : count;
1006 }
1007
1008 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
1009 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
1010         struct device_attribute *attr, const char *buf, size_t count)   \
1011 {                                                                       \
1012         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
1013 }                                                                       \
1014 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
1015                    NULL, wacom_btnimg##BUTTON_ID##_store)
1016
1017 DEVICE_BTNIMG_ATTR(0);
1018 DEVICE_BTNIMG_ATTR(1);
1019 DEVICE_BTNIMG_ATTR(2);
1020 DEVICE_BTNIMG_ATTR(3);
1021 DEVICE_BTNIMG_ATTR(4);
1022 DEVICE_BTNIMG_ATTR(5);
1023 DEVICE_BTNIMG_ATTR(6);
1024 DEVICE_BTNIMG_ATTR(7);
1025
1026 static struct attribute *cintiq_led_attrs[] = {
1027         &dev_attr_status_led0_select.attr,
1028         &dev_attr_status_led1_select.attr,
1029         NULL
1030 };
1031
1032 static struct attribute_group cintiq_led_attr_group = {
1033         .name = "wacom_led",
1034         .attrs = cintiq_led_attrs,
1035 };
1036
1037 static struct attribute *intuos4_led_attrs[] = {
1038         &dev_attr_status0_luminance.attr,
1039         &dev_attr_status1_luminance.attr,
1040         &dev_attr_status_led0_select.attr,
1041         &dev_attr_buttons_luminance.attr,
1042         &dev_attr_button0_rawimg.attr,
1043         &dev_attr_button1_rawimg.attr,
1044         &dev_attr_button2_rawimg.attr,
1045         &dev_attr_button3_rawimg.attr,
1046         &dev_attr_button4_rawimg.attr,
1047         &dev_attr_button5_rawimg.attr,
1048         &dev_attr_button6_rawimg.attr,
1049         &dev_attr_button7_rawimg.attr,
1050         NULL
1051 };
1052
1053 static struct attribute_group intuos4_led_attr_group = {
1054         .name = "wacom_led",
1055         .attrs = intuos4_led_attrs,
1056 };
1057
1058 static struct attribute *intuos5_led_attrs[] = {
1059         &dev_attr_status0_luminance.attr,
1060         &dev_attr_status_led0_select.attr,
1061         NULL
1062 };
1063
1064 static struct attribute_group intuos5_led_attr_group = {
1065         .name = "wacom_led",
1066         .attrs = intuos5_led_attrs,
1067 };
1068
1069 static struct attribute *generic_led_attrs[] = {
1070         &dev_attr_status0_luminance.attr,
1071         &dev_attr_status_led0_select.attr,
1072         NULL
1073 };
1074
1075 static struct attribute_group generic_led_attr_group = {
1076         .name = "wacom_led",
1077         .attrs = generic_led_attrs,
1078 };
1079
1080 struct wacom_sysfs_group_devres {
1081         struct attribute_group *group;
1082         struct kobject *root;
1083 };
1084
1085 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1086 {
1087         struct wacom_sysfs_group_devres *devres = res;
1088         struct kobject *kobj = devres->root;
1089
1090         dev_dbg(dev, "%s: dropping reference to %s\n",
1091                 __func__, devres->group->name);
1092         sysfs_remove_group(kobj, devres->group);
1093 }
1094
1095 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1096                                            struct kobject *root,
1097                                            struct attribute_group *group)
1098 {
1099         struct wacom_sysfs_group_devres *devres;
1100         int error;
1101
1102         devres = devres_alloc(wacom_devm_sysfs_group_release,
1103                               sizeof(struct wacom_sysfs_group_devres),
1104                               GFP_KERNEL);
1105         if (!devres)
1106                 return -ENOMEM;
1107
1108         devres->group = group;
1109         devres->root = root;
1110
1111         error = sysfs_create_group(devres->root, group);
1112         if (error)
1113                 return error;
1114
1115         devres_add(&wacom->hdev->dev, devres);
1116
1117         return 0;
1118 }
1119
1120 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1121                                          struct attribute_group *group)
1122 {
1123         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1124                                                group);
1125 }
1126
1127 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1128 {
1129         struct wacom *wacom = led->wacom;
1130
1131         if (wacom->led.max_hlv)
1132                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1133
1134         if (wacom->led.max_llv)
1135                 return led->llv * LED_FULL / wacom->led.max_llv;
1136
1137         /* device doesn't support brightness tuning */
1138         return LED_FULL;
1139 }
1140
1141 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1142 {
1143         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1144         struct wacom *wacom = led->wacom;
1145
1146         if (wacom->led.groups[led->group].select != led->id)
1147                 return LED_OFF;
1148
1149         return wacom_leds_brightness_get(led);
1150 }
1151
1152 static int wacom_led_brightness_set(struct led_classdev *cdev,
1153                                     enum led_brightness brightness)
1154 {
1155         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1156         struct wacom *wacom = led->wacom;
1157         int error;
1158
1159         mutex_lock(&wacom->lock);
1160
1161         if (!wacom->led.groups || (brightness == LED_OFF &&
1162             wacom->led.groups[led->group].select != led->id)) {
1163                 error = 0;
1164                 goto out;
1165         }
1166
1167         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1168         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1169
1170         wacom->led.groups[led->group].select = led->id;
1171
1172         error = wacom_led_control(wacom);
1173
1174 out:
1175         mutex_unlock(&wacom->lock);
1176
1177         return error;
1178 }
1179
1180 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1181                                                enum led_brightness brightness)
1182 {
1183 }
1184
1185 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1186                                   struct wacom_led *led, unsigned int group,
1187                                   unsigned int id, bool read_only)
1188 {
1189         int error;
1190         char *name;
1191
1192         name = devm_kasprintf(dev, GFP_KERNEL,
1193                               "%s::wacom-%d.%d",
1194                               dev_name(dev),
1195                               group,
1196                               id);
1197         if (!name)
1198                 return -ENOMEM;
1199
1200         if (!read_only) {
1201                 led->trigger.name = name;
1202                 error = devm_led_trigger_register(dev, &led->trigger);
1203                 if (error) {
1204                         hid_err(wacom->hdev,
1205                                 "failed to register LED trigger %s: %d\n",
1206                                 led->cdev.name, error);
1207                         return error;
1208                 }
1209         }
1210
1211         led->group = group;
1212         led->id = id;
1213         led->wacom = wacom;
1214         led->llv = wacom->led.llv;
1215         led->hlv = wacom->led.hlv;
1216         led->cdev.name = name;
1217         led->cdev.max_brightness = LED_FULL;
1218         led->cdev.flags = LED_HW_PLUGGABLE;
1219         led->cdev.brightness_get = __wacom_led_brightness_get;
1220         if (!read_only) {
1221                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1222                 led->cdev.default_trigger = led->cdev.name;
1223         } else {
1224                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1225         }
1226
1227         error = devm_led_classdev_register(dev, &led->cdev);
1228         if (error) {
1229                 hid_err(wacom->hdev,
1230                         "failed to register LED %s: %d\n",
1231                         led->cdev.name, error);
1232                 led->cdev.name = NULL;
1233                 return error;
1234         }
1235
1236         return 0;
1237 }
1238
1239 static void wacom_led_groups_release_one(void *data)
1240 {
1241         struct wacom_group_leds *group = data;
1242
1243         devres_release_group(group->dev, group);
1244 }
1245
1246 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1247                                                    struct wacom *wacom,
1248                                                    int group_id, int count,
1249                                                    bool read_only)
1250 {
1251         struct wacom_led *leds;
1252         int i, error;
1253
1254         if (group_id >= wacom->led.count || count <= 0)
1255                 return -EINVAL;
1256
1257         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1258                 return -ENOMEM;
1259
1260         leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1261         if (!leds) {
1262                 error = -ENOMEM;
1263                 goto err;
1264         }
1265
1266         wacom->led.groups[group_id].leds = leds;
1267         wacom->led.groups[group_id].count = count;
1268
1269         for (i = 0; i < count; i++) {
1270                 error = wacom_led_register_one(dev, wacom, &leds[i],
1271                                                group_id, i, read_only);
1272                 if (error)
1273                         goto err;
1274         }
1275
1276         wacom->led.groups[group_id].dev = dev;
1277
1278         devres_close_group(dev, &wacom->led.groups[group_id]);
1279
1280         /*
1281          * There is a bug (?) in devm_led_classdev_register() in which its
1282          * increments the refcount of the parent. If the parent is an input
1283          * device, that means the ref count never reaches 0 when
1284          * devm_input_device_release() gets called.
1285          * This means that the LEDs are still there after disconnect.
1286          * Manually force the release of the group so that the leds are released
1287          * once we are done using them.
1288          */
1289         error = devm_add_action_or_reset(&wacom->hdev->dev,
1290                                          wacom_led_groups_release_one,
1291                                          &wacom->led.groups[group_id]);
1292         if (error)
1293                 return error;
1294
1295         return 0;
1296
1297 err:
1298         devres_release_group(dev, &wacom->led.groups[group_id]);
1299         return error;
1300 }
1301
1302 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1303                                  unsigned int id)
1304 {
1305         struct wacom_group_leds *group;
1306
1307         if (group_id >= wacom->led.count)
1308                 return NULL;
1309
1310         group = &wacom->led.groups[group_id];
1311
1312         if (!group->leds)
1313                 return NULL;
1314
1315         id %= group->count;
1316
1317         return &group->leds[id];
1318 }
1319
1320 /**
1321  * wacom_led_next: gives the next available led with a wacom trigger.
1322  *
1323  * returns the next available struct wacom_led which has its default trigger
1324  * or the current one if none is available.
1325  */
1326 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1327 {
1328         struct wacom_led *next_led;
1329         int group, next;
1330
1331         if (!wacom || !cur)
1332                 return NULL;
1333
1334         group = cur->group;
1335         next = cur->id;
1336
1337         do {
1338                 next_led = wacom_led_find(wacom, group, ++next);
1339                 if (!next_led || next_led == cur)
1340                         return next_led;
1341         } while (next_led->cdev.trigger != &next_led->trigger);
1342
1343         return next_led;
1344 }
1345
1346 static void wacom_led_groups_release(void *data)
1347 {
1348         struct wacom *wacom = data;
1349
1350         wacom->led.groups = NULL;
1351         wacom->led.count = 0;
1352 }
1353
1354 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1355 {
1356         struct device *dev = &wacom->hdev->dev;
1357         struct wacom_group_leds *groups;
1358         int error;
1359
1360         groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1361                               GFP_KERNEL);
1362         if (!groups)
1363                 return -ENOMEM;
1364
1365         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1366         if (error)
1367                 return error;
1368
1369         wacom->led.groups = groups;
1370         wacom->led.count = count;
1371
1372         return 0;
1373 }
1374
1375 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1376                                          int led_per_group, bool read_only)
1377 {
1378         struct device *dev;
1379         int i, error;
1380
1381         if (!wacom->wacom_wac.pad_input)
1382                 return -EINVAL;
1383
1384         dev = &wacom->wacom_wac.pad_input->dev;
1385
1386         error = wacom_led_groups_allocate(wacom, group_count);
1387         if (error)
1388                 return error;
1389
1390         for (i = 0; i < group_count; i++) {
1391                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1392                                                                 led_per_group,
1393                                                                 read_only);
1394                 if (error)
1395                         return error;
1396         }
1397
1398         return 0;
1399 }
1400
1401 int wacom_initialize_leds(struct wacom *wacom)
1402 {
1403         int error;
1404
1405         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1406                 return 0;
1407
1408         /* Initialize default values */
1409         switch (wacom->wacom_wac.features.type) {
1410         case HID_GENERIC:
1411                 if (!wacom->generic_has_leds)
1412                         return 0;
1413                 wacom->led.llv = 100;
1414                 wacom->led.max_llv = 100;
1415
1416                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1417                 if (error) {
1418                         hid_err(wacom->hdev,
1419                                 "cannot create leds err: %d\n", error);
1420                         return error;
1421                 }
1422
1423                 error = wacom_devm_sysfs_create_group(wacom,
1424                                                       &generic_led_attr_group);
1425                 break;
1426
1427         case INTUOS4S:
1428         case INTUOS4:
1429         case INTUOS4WL:
1430         case INTUOS4L:
1431                 wacom->led.llv = 10;
1432                 wacom->led.hlv = 20;
1433                 wacom->led.max_llv = 127;
1434                 wacom->led.max_hlv = 127;
1435                 wacom->led.img_lum = 10;
1436
1437                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1438                 if (error) {
1439                         hid_err(wacom->hdev,
1440                                 "cannot create leds err: %d\n", error);
1441                         return error;
1442                 }
1443
1444                 error = wacom_devm_sysfs_create_group(wacom,
1445                                                       &intuos4_led_attr_group);
1446                 break;
1447
1448         case WACOM_24HD:
1449         case WACOM_21UX2:
1450                 wacom->led.llv = 0;
1451                 wacom->led.hlv = 0;
1452                 wacom->led.img_lum = 0;
1453
1454                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1455                 if (error) {
1456                         hid_err(wacom->hdev,
1457                                 "cannot create leds err: %d\n", error);
1458                         return error;
1459                 }
1460
1461                 error = wacom_devm_sysfs_create_group(wacom,
1462                                                       &cintiq_led_attr_group);
1463                 break;
1464
1465         case INTUOS5S:
1466         case INTUOS5:
1467         case INTUOS5L:
1468         case INTUOSPS:
1469         case INTUOSPM:
1470         case INTUOSPL:
1471                 wacom->led.llv = 32;
1472                 wacom->led.max_llv = 96;
1473
1474                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1475                 if (error) {
1476                         hid_err(wacom->hdev,
1477                                 "cannot create leds err: %d\n", error);
1478                         return error;
1479                 }
1480
1481                 error = wacom_devm_sysfs_create_group(wacom,
1482                                                       &intuos5_led_attr_group);
1483                 break;
1484
1485         case INTUOSP2_BT:
1486                 wacom->led.llv = 50;
1487                 wacom->led.max_llv = 100;
1488                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1489                 if (error) {
1490                         hid_err(wacom->hdev,
1491                                 "cannot create leds err: %d\n", error);
1492                         return error;
1493                 }
1494                 return 0;
1495
1496         case REMOTE:
1497                 wacom->led.llv = 255;
1498                 wacom->led.max_llv = 255;
1499                 error = wacom_led_groups_allocate(wacom, 5);
1500                 if (error) {
1501                         hid_err(wacom->hdev,
1502                                 "cannot create leds err: %d\n", error);
1503                         return error;
1504                 }
1505                 return 0;
1506
1507         default:
1508                 return 0;
1509         }
1510
1511         if (error) {
1512                 hid_err(wacom->hdev,
1513                         "cannot create sysfs group err: %d\n", error);
1514                 return error;
1515         }
1516
1517         return 0;
1518 }
1519
1520 static void wacom_init_work(struct work_struct *work)
1521 {
1522         struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1523
1524         _wacom_query_tablet_data(wacom);
1525         wacom_led_control(wacom);
1526 }
1527
1528 static void wacom_query_tablet_data(struct wacom *wacom)
1529 {
1530         schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1531 }
1532
1533 static enum power_supply_property wacom_battery_props[] = {
1534         POWER_SUPPLY_PROP_MODEL_NAME,
1535         POWER_SUPPLY_PROP_PRESENT,
1536         POWER_SUPPLY_PROP_STATUS,
1537         POWER_SUPPLY_PROP_SCOPE,
1538         POWER_SUPPLY_PROP_CAPACITY
1539 };
1540
1541 static int wacom_battery_get_property(struct power_supply *psy,
1542                                       enum power_supply_property psp,
1543                                       union power_supply_propval *val)
1544 {
1545         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1546         int ret = 0;
1547
1548         switch (psp) {
1549                 case POWER_SUPPLY_PROP_MODEL_NAME:
1550                         val->strval = battery->wacom->wacom_wac.name;
1551                         break;
1552                 case POWER_SUPPLY_PROP_PRESENT:
1553                         val->intval = battery->bat_connected;
1554                         break;
1555                 case POWER_SUPPLY_PROP_SCOPE:
1556                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1557                         break;
1558                 case POWER_SUPPLY_PROP_CAPACITY:
1559                         val->intval = battery->battery_capacity;
1560                         break;
1561                 case POWER_SUPPLY_PROP_STATUS:
1562                         if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1563                                 val->intval = battery->bat_status;
1564                         else if (battery->bat_charging)
1565                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1566                         else if (battery->battery_capacity == 100 &&
1567                                     battery->ps_connected)
1568                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1569                         else if (battery->ps_connected)
1570                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1571                         else
1572                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1573                         break;
1574                 default:
1575                         ret = -EINVAL;
1576                         break;
1577         }
1578
1579         return ret;
1580 }
1581
1582 static int __wacom_initialize_battery(struct wacom *wacom,
1583                                       struct wacom_battery *battery)
1584 {
1585         static atomic_t battery_no = ATOMIC_INIT(0);
1586         struct device *dev = &wacom->hdev->dev;
1587         struct power_supply_config psy_cfg = { .drv_data = battery, };
1588         struct power_supply *ps_bat;
1589         struct power_supply_desc *bat_desc = &battery->bat_desc;
1590         unsigned long n;
1591         int error;
1592
1593         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1594                 return -ENOMEM;
1595
1596         battery->wacom = wacom;
1597
1598         n = atomic_inc_return(&battery_no) - 1;
1599
1600         bat_desc->properties = wacom_battery_props;
1601         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1602         bat_desc->get_property = wacom_battery_get_property;
1603         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1604         bat_desc->name = battery->bat_name;
1605         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1606         bat_desc->use_for_apm = 0;
1607
1608         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1609         if (IS_ERR(ps_bat)) {
1610                 error = PTR_ERR(ps_bat);
1611                 goto err;
1612         }
1613
1614         power_supply_powers(ps_bat, &wacom->hdev->dev);
1615
1616         battery->battery = ps_bat;
1617
1618         devres_close_group(dev, bat_desc);
1619         return 0;
1620
1621 err:
1622         devres_release_group(dev, bat_desc);
1623         return error;
1624 }
1625
1626 static int wacom_initialize_battery(struct wacom *wacom)
1627 {
1628         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1629                 return __wacom_initialize_battery(wacom, &wacom->battery);
1630
1631         return 0;
1632 }
1633
1634 static void wacom_destroy_battery(struct wacom *wacom)
1635 {
1636         if (wacom->battery.battery) {
1637                 devres_release_group(&wacom->hdev->dev,
1638                                      &wacom->battery.bat_desc);
1639                 wacom->battery.battery = NULL;
1640         }
1641 }
1642
1643 static ssize_t wacom_show_speed(struct device *dev,
1644                                 struct device_attribute
1645                                 *attr, char *buf)
1646 {
1647         struct hid_device *hdev = to_hid_device(dev);
1648         struct wacom *wacom = hid_get_drvdata(hdev);
1649
1650         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1651 }
1652
1653 static ssize_t wacom_store_speed(struct device *dev,
1654                                 struct device_attribute *attr,
1655                                 const char *buf, size_t count)
1656 {
1657         struct hid_device *hdev = to_hid_device(dev);
1658         struct wacom *wacom = hid_get_drvdata(hdev);
1659         u8 new_speed;
1660
1661         if (kstrtou8(buf, 0, &new_speed))
1662                 return -EINVAL;
1663
1664         if (new_speed != 0 && new_speed != 1)
1665                 return -EINVAL;
1666
1667         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1668
1669         return count;
1670 }
1671
1672 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1673                 wacom_show_speed, wacom_store_speed);
1674
1675
1676 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1677                                       struct kobj_attribute *kattr,
1678                                       char *buf, int index)
1679 {
1680         struct device *dev = kobj_to_dev(kobj->parent);
1681         struct hid_device *hdev = to_hid_device(dev);
1682         struct wacom *wacom = hid_get_drvdata(hdev);
1683         u8 mode;
1684
1685         mode = wacom->led.groups[index].select;
1686         return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1687 }
1688
1689 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1690 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1691                                struct kobj_attribute *kattr, char *buf) \
1692 {                                                                       \
1693         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1694 }                                                                       \
1695 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1696         .attr = {.name = "remote_mode",                                 \
1697                 .mode = DEV_ATTR_RO_PERM},                              \
1698         .show = wacom_show_remote##SET_ID##_mode,                       \
1699 };                                                                      \
1700 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1701         &remote##SET_ID##_mode_attr.attr,                               \
1702         NULL                                                            \
1703 };                                                                      \
1704 static struct attribute_group remote##SET_ID##_serial_group = {         \
1705         .name = NULL,                                                   \
1706         .attrs = remote##SET_ID##_serial_attrs,                         \
1707 }
1708
1709 DEVICE_EKR_ATTR_GROUP(0);
1710 DEVICE_EKR_ATTR_GROUP(1);
1711 DEVICE_EKR_ATTR_GROUP(2);
1712 DEVICE_EKR_ATTR_GROUP(3);
1713 DEVICE_EKR_ATTR_GROUP(4);
1714
1715 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1716                                           int index)
1717 {
1718         int error = 0;
1719         struct wacom_remote *remote = wacom->remote;
1720
1721         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1722                                                           GFP_KERNEL,
1723                                                           "%d", serial);
1724         if (!remote->remotes[index].group.name)
1725                 return -ENOMEM;
1726
1727         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1728                                                 &remote->remotes[index].group);
1729         if (error) {
1730                 remote->remotes[index].group.name = NULL;
1731                 hid_err(wacom->hdev,
1732                         "cannot create sysfs group err: %d\n", error);
1733                 return error;
1734         }
1735
1736         return 0;
1737 }
1738
1739 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1740 {
1741         const size_t buf_size = 2;
1742         unsigned char *buf;
1743         int retval;
1744
1745         buf = kzalloc(buf_size, GFP_KERNEL);
1746         if (!buf)
1747                 return -ENOMEM;
1748
1749         buf[0] = WAC_CMD_DELETE_PAIRING;
1750         buf[1] = selector;
1751
1752         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1753                                   buf_size, WAC_CMD_RETRIES);
1754         kfree(buf);
1755
1756         return retval;
1757 }
1758
1759 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1760                                          struct kobj_attribute *attr,
1761                                          const char *buf, size_t count)
1762 {
1763         unsigned char selector = 0;
1764         struct device *dev = kobj_to_dev(kobj->parent);
1765         struct hid_device *hdev = to_hid_device(dev);
1766         struct wacom *wacom = hid_get_drvdata(hdev);
1767         int err;
1768
1769         if (!strncmp(buf, "*\n", 2)) {
1770                 selector = WAC_CMD_UNPAIR_ALL;
1771         } else {
1772                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1773                          buf);
1774                 return -1;
1775         }
1776
1777         mutex_lock(&wacom->lock);
1778
1779         err = wacom_cmd_unpair_remote(wacom, selector);
1780         mutex_unlock(&wacom->lock);
1781
1782         return err < 0 ? err : count;
1783 }
1784
1785 static struct kobj_attribute unpair_remote_attr = {
1786         .attr = {.name = "unpair_remote", .mode = 0200},
1787         .store = wacom_store_unpair_remote,
1788 };
1789
1790 static const struct attribute *remote_unpair_attrs[] = {
1791         &unpair_remote_attr.attr,
1792         NULL
1793 };
1794
1795 static void wacom_remotes_destroy(void *data)
1796 {
1797         struct wacom *wacom = data;
1798         struct wacom_remote *remote = wacom->remote;
1799
1800         if (!remote)
1801                 return;
1802
1803         kobject_put(remote->remote_dir);
1804         kfifo_free(&remote->remote_fifo);
1805         wacom->remote = NULL;
1806 }
1807
1808 static int wacom_initialize_remotes(struct wacom *wacom)
1809 {
1810         int error = 0;
1811         struct wacom_remote *remote;
1812         int i;
1813
1814         if (wacom->wacom_wac.features.type != REMOTE)
1815                 return 0;
1816
1817         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1818                               GFP_KERNEL);
1819         if (!remote)
1820                 return -ENOMEM;
1821
1822         wacom->remote = remote;
1823
1824         spin_lock_init(&remote->remote_lock);
1825
1826         error = kfifo_alloc(&remote->remote_fifo,
1827                         5 * sizeof(struct wacom_remote_data),
1828                         GFP_KERNEL);
1829         if (error) {
1830                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1831                 return -ENOMEM;
1832         }
1833
1834         remote->remotes[0].group = remote0_serial_group;
1835         remote->remotes[1].group = remote1_serial_group;
1836         remote->remotes[2].group = remote2_serial_group;
1837         remote->remotes[3].group = remote3_serial_group;
1838         remote->remotes[4].group = remote4_serial_group;
1839
1840         remote->remote_dir = kobject_create_and_add("wacom_remote",
1841                                                     &wacom->hdev->dev.kobj);
1842         if (!remote->remote_dir)
1843                 return -ENOMEM;
1844
1845         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1846
1847         if (error) {
1848                 hid_err(wacom->hdev,
1849                         "cannot create sysfs group err: %d\n", error);
1850                 return error;
1851         }
1852
1853         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1854                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1855                 remote->remotes[i].serial = 0;
1856         }
1857
1858         error = devm_add_action_or_reset(&wacom->hdev->dev,
1859                                          wacom_remotes_destroy, wacom);
1860         if (error)
1861                 return error;
1862
1863         return 0;
1864 }
1865
1866 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1867 {
1868         struct input_dev *input_dev;
1869         struct hid_device *hdev = wacom->hdev;
1870         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1871
1872         input_dev = devm_input_allocate_device(&hdev->dev);
1873         if (!input_dev)
1874                 return NULL;
1875
1876         input_dev->name = wacom_wac->features.name;
1877         input_dev->phys = hdev->phys;
1878         input_dev->dev.parent = &hdev->dev;
1879         input_dev->open = wacom_open;
1880         input_dev->close = wacom_close;
1881         input_dev->uniq = hdev->uniq;
1882         input_dev->id.bustype = hdev->bus;
1883         input_dev->id.vendor  = hdev->vendor;
1884         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1885         input_dev->id.version = hdev->version;
1886         input_set_drvdata(input_dev, wacom);
1887
1888         return input_dev;
1889 }
1890
1891 static int wacom_allocate_inputs(struct wacom *wacom)
1892 {
1893         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1894
1895         wacom_wac->pen_input = wacom_allocate_input(wacom);
1896         wacom_wac->touch_input = wacom_allocate_input(wacom);
1897         wacom_wac->pad_input = wacom_allocate_input(wacom);
1898         if (!wacom_wac->pen_input ||
1899             !wacom_wac->touch_input ||
1900             !wacom_wac->pad_input)
1901                 return -ENOMEM;
1902
1903         wacom_wac->pen_input->name = wacom_wac->pen_name;
1904         wacom_wac->touch_input->name = wacom_wac->touch_name;
1905         wacom_wac->pad_input->name = wacom_wac->pad_name;
1906
1907         return 0;
1908 }
1909
1910 static int wacom_register_inputs(struct wacom *wacom)
1911 {
1912         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1913         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1914         int error = 0;
1915
1916         pen_input_dev = wacom_wac->pen_input;
1917         touch_input_dev = wacom_wac->touch_input;
1918         pad_input_dev = wacom_wac->pad_input;
1919
1920         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1921                 return -EINVAL;
1922
1923         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1924         if (error) {
1925                 /* no pen in use on this interface */
1926                 input_free_device(pen_input_dev);
1927                 wacom_wac->pen_input = NULL;
1928                 pen_input_dev = NULL;
1929         } else {
1930                 error = input_register_device(pen_input_dev);
1931                 if (error)
1932                         goto fail;
1933         }
1934
1935         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1936         if (error) {
1937                 /* no touch in use on this interface */
1938                 input_free_device(touch_input_dev);
1939                 wacom_wac->touch_input = NULL;
1940                 touch_input_dev = NULL;
1941         } else {
1942                 error = input_register_device(touch_input_dev);
1943                 if (error)
1944                         goto fail;
1945         }
1946
1947         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1948         if (error) {
1949                 /* no pad in use on this interface */
1950                 input_free_device(pad_input_dev);
1951                 wacom_wac->pad_input = NULL;
1952                 pad_input_dev = NULL;
1953         } else {
1954                 error = input_register_device(pad_input_dev);
1955                 if (error)
1956                         goto fail;
1957         }
1958
1959         return 0;
1960
1961 fail:
1962         wacom_wac->pad_input = NULL;
1963         wacom_wac->touch_input = NULL;
1964         wacom_wac->pen_input = NULL;
1965         return error;
1966 }
1967
1968 /*
1969  * Not all devices report physical dimensions from HID.
1970  * Compute the default from hardcoded logical dimension
1971  * and resolution before driver overwrites them.
1972  */
1973 static void wacom_set_default_phy(struct wacom_features *features)
1974 {
1975         if (features->x_resolution) {
1976                 features->x_phy = (features->x_max * 100) /
1977                                         features->x_resolution;
1978                 features->y_phy = (features->y_max * 100) /
1979                                         features->y_resolution;
1980         }
1981 }
1982
1983 static void wacom_calculate_res(struct wacom_features *features)
1984 {
1985         /* set unit to "100th of a mm" for devices not reported by HID */
1986         if (!features->unit) {
1987                 features->unit = 0x11;
1988                 features->unitExpo = -3;
1989         }
1990
1991         features->x_resolution = wacom_calc_hid_res(features->x_max,
1992                                                     features->x_phy,
1993                                                     features->unit,
1994                                                     features->unitExpo);
1995         features->y_resolution = wacom_calc_hid_res(features->y_max,
1996                                                     features->y_phy,
1997                                                     features->unit,
1998                                                     features->unitExpo);
1999 }
2000
2001 void wacom_battery_work(struct work_struct *work)
2002 {
2003         struct wacom *wacom = container_of(work, struct wacom, battery_work);
2004
2005         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2006              !wacom->battery.battery) {
2007                 wacom_initialize_battery(wacom);
2008         }
2009         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2010                  wacom->battery.battery) {
2011                 wacom_destroy_battery(wacom);
2012         }
2013 }
2014
2015 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2016 {
2017         struct hid_report_enum *report_enum;
2018         struct hid_report *report;
2019         size_t size = 0;
2020
2021         report_enum = hdev->report_enum + HID_INPUT_REPORT;
2022
2023         list_for_each_entry(report, &report_enum->report_list, list) {
2024                 size_t report_size = hid_report_len(report);
2025                 if (report_size > size)
2026                         size = report_size;
2027         }
2028
2029         return size;
2030 }
2031
2032 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2033 {
2034         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2035         struct wacom_features *features = &wacom_wac->features;
2036         char name[WACOM_NAME_MAX];
2037
2038         /* Generic devices name unspecified */
2039         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2040                 char *product_name = wacom->hdev->name;
2041
2042                 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2043                         struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2044                         struct usb_device *dev = interface_to_usbdev(intf);
2045                         product_name = dev->product;
2046                 }
2047
2048                 if (wacom->hdev->bus == BUS_I2C) {
2049                         snprintf(name, sizeof(name), "%s %X",
2050                                  features->name, wacom->hdev->product);
2051                 } else if (strstr(product_name, "Wacom") ||
2052                            strstr(product_name, "wacom") ||
2053                            strstr(product_name, "WACOM")) {
2054                         strlcpy(name, product_name, sizeof(name));
2055                 } else {
2056                         snprintf(name, sizeof(name), "Wacom %s", product_name);
2057                 }
2058
2059                 /* strip out excess whitespaces */
2060                 while (1) {
2061                         char *gap = strstr(name, "  ");
2062                         if (gap == NULL)
2063                                 break;
2064                         /* shift everything including the terminator */
2065                         memmove(gap, gap+1, strlen(gap));
2066                 }
2067
2068                 /* get rid of trailing whitespace */
2069                 if (name[strlen(name)-1] == ' ')
2070                         name[strlen(name)-1] = '\0';
2071         } else {
2072                 strlcpy(name, features->name, sizeof(name));
2073         }
2074
2075         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2076                  name, suffix);
2077
2078         /* Append the device type to the name */
2079         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2080                 "%s%s Pen", name, suffix);
2081         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2082                 "%s%s Finger", name, suffix);
2083         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2084                 "%s%s Pad", name, suffix);
2085 }
2086
2087 static void wacom_release_resources(struct wacom *wacom)
2088 {
2089         struct hid_device *hdev = wacom->hdev;
2090
2091         if (!wacom->resources)
2092                 return;
2093
2094         devres_release_group(&hdev->dev, wacom);
2095
2096         wacom->resources = false;
2097
2098         wacom->wacom_wac.pen_input = NULL;
2099         wacom->wacom_wac.touch_input = NULL;
2100         wacom->wacom_wac.pad_input = NULL;
2101 }
2102
2103 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2104 {
2105         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2106                 wacom_wac->shared->type = wacom_wac->features.type;
2107                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2108         }
2109
2110         if (wacom_wac->has_mute_touch_switch) {
2111                 wacom_wac->shared->has_mute_touch_switch = true;
2112                 wacom_wac->shared->is_touch_on = true;
2113         }
2114
2115         if (wacom_wac->shared->has_mute_touch_switch &&
2116             wacom_wac->shared->touch_input) {
2117                 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2118                 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2119                                      SW_MUTE_DEVICE);
2120         }
2121 }
2122
2123 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2124 {
2125         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2126         struct wacom_features *features = &wacom_wac->features;
2127         struct hid_device *hdev = wacom->hdev;
2128         int error;
2129         unsigned int connect_mask = HID_CONNECT_HIDRAW;
2130
2131         features->pktlen = wacom_compute_pktlen(hdev);
2132         if (features->pktlen > WACOM_PKGLEN_MAX)
2133                 return -EINVAL;
2134
2135         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2136                 return -ENOMEM;
2137
2138         wacom->resources = true;
2139
2140         error = wacom_allocate_inputs(wacom);
2141         if (error)
2142                 goto fail;
2143
2144         /*
2145          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2146          * into debug mode for the touch part.
2147          * We ignore the other interfaces.
2148          */
2149         if (features->type == BAMBOO_PAD) {
2150                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2151                         features->type = HID_GENERIC;
2152                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2153                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2154                         error = -ENODEV;
2155                         goto fail;
2156                 }
2157         }
2158
2159         /* set the default size in case we do not get them from hid */
2160         wacom_set_default_phy(features);
2161
2162         /* Retrieve the physical and logical size for touch devices */
2163         wacom_retrieve_hid_descriptor(hdev, features);
2164         wacom_setup_device_quirks(wacom);
2165
2166         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2167             features->type != WIRELESS) {
2168                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2169
2170                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2171                          hdev->name,
2172                          error ? "Ignoring" : "Assuming pen");
2173
2174                 if (error)
2175                         goto fail;
2176
2177                 features->device_type |= WACOM_DEVICETYPE_PEN;
2178         }
2179
2180         wacom_calculate_res(features);
2181
2182         wacom_update_name(wacom, wireless ? " (WL)" : "");
2183
2184         /* pen only Bamboo neither support touch nor pad */
2185         if ((features->type == BAMBOO_PEN) &&
2186             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2187             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2188                 error = -ENODEV;
2189                 goto fail;
2190         }
2191
2192         error = wacom_add_shared_data(hdev);
2193         if (error)
2194                 goto fail;
2195
2196         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2197              (features->quirks & WACOM_QUIRK_BATTERY)) {
2198                 error = wacom_initialize_battery(wacom);
2199                 if (error)
2200                         goto fail;
2201         }
2202
2203         error = wacom_register_inputs(wacom);
2204         if (error)
2205                 goto fail;
2206
2207         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2208                 error = wacom_initialize_leds(wacom);
2209                 if (error)
2210                         goto fail;
2211
2212                 error = wacom_initialize_remotes(wacom);
2213                 if (error)
2214                         goto fail;
2215         }
2216
2217         if (features->type == HID_GENERIC)
2218                 connect_mask |= HID_CONNECT_DRIVER;
2219
2220         /* Regular HID work starts now */
2221         error = hid_hw_start(hdev, connect_mask);
2222         if (error) {
2223                 hid_err(hdev, "hw start failed\n");
2224                 goto fail;
2225         }
2226
2227         if (!wireless) {
2228                 /* Note that if query fails it is not a hard failure */
2229                 wacom_query_tablet_data(wacom);
2230         }
2231
2232         /* touch only Bamboo doesn't support pen */
2233         if ((features->type == BAMBOO_TOUCH) &&
2234             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2235                 cancel_delayed_work_sync(&wacom->init_work);
2236                 _wacom_query_tablet_data(wacom);
2237                 error = -ENODEV;
2238                 goto fail_quirks;
2239         }
2240
2241         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2242                 error = hid_hw_open(hdev);
2243
2244         wacom_set_shared_values(wacom_wac);
2245         devres_close_group(&hdev->dev, wacom);
2246
2247         return 0;
2248
2249 fail_quirks:
2250         hid_hw_stop(hdev);
2251 fail:
2252         wacom_release_resources(wacom);
2253         return error;
2254 }
2255
2256 static void wacom_wireless_work(struct work_struct *work)
2257 {
2258         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2259         struct usb_device *usbdev = wacom->usbdev;
2260         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2261         struct hid_device *hdev1, *hdev2;
2262         struct wacom *wacom1, *wacom2;
2263         struct wacom_wac *wacom_wac1, *wacom_wac2;
2264         int error;
2265
2266         /*
2267          * Regardless if this is a disconnect or a new tablet,
2268          * remove any existing input and battery devices.
2269          */
2270
2271         wacom_destroy_battery(wacom);
2272
2273         /* Stylus interface */
2274         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2275         wacom1 = hid_get_drvdata(hdev1);
2276         wacom_wac1 = &(wacom1->wacom_wac);
2277         wacom_release_resources(wacom1);
2278
2279         /* Touch interface */
2280         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2281         wacom2 = hid_get_drvdata(hdev2);
2282         wacom_wac2 = &(wacom2->wacom_wac);
2283         wacom_release_resources(wacom2);
2284
2285         if (wacom_wac->pid == 0) {
2286                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2287         } else {
2288                 const struct hid_device_id *id = wacom_ids;
2289
2290                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2291                          wacom_wac->pid);
2292
2293                 while (id->bus) {
2294                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2295                             id->product == wacom_wac->pid)
2296                                 break;
2297                         id++;
2298                 }
2299
2300                 if (!id->bus) {
2301                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2302                         return;
2303                 }
2304
2305                 /* Stylus interface */
2306                 wacom_wac1->features =
2307                         *((struct wacom_features *)id->driver_data);
2308
2309                 wacom_wac1->pid = wacom_wac->pid;
2310                 hid_hw_stop(hdev1);
2311                 error = wacom_parse_and_register(wacom1, true);
2312                 if (error)
2313                         goto fail;
2314
2315                 /* Touch interface */
2316                 if (wacom_wac1->features.touch_max ||
2317                     (wacom_wac1->features.type >= INTUOSHT &&
2318                     wacom_wac1->features.type <= BAMBOO_PT)) {
2319                         wacom_wac2->features =
2320                                 *((struct wacom_features *)id->driver_data);
2321                         wacom_wac2->pid = wacom_wac->pid;
2322                         hid_hw_stop(hdev2);
2323                         error = wacom_parse_and_register(wacom2, true);
2324                         if (error)
2325                                 goto fail;
2326                 }
2327
2328                 strlcpy(wacom_wac->name, wacom_wac1->name,
2329                         sizeof(wacom_wac->name));
2330                 error = wacom_initialize_battery(wacom);
2331                 if (error)
2332                         goto fail;
2333         }
2334
2335         return;
2336
2337 fail:
2338         wacom_release_resources(wacom1);
2339         wacom_release_resources(wacom2);
2340         return;
2341 }
2342
2343 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2344 {
2345         struct wacom_remote *remote = wacom->remote;
2346         u32 serial = remote->remotes[index].serial;
2347         int i;
2348         unsigned long flags;
2349
2350         spin_lock_irqsave(&remote->remote_lock, flags);
2351         remote->remotes[index].registered = false;
2352         spin_unlock_irqrestore(&remote->remote_lock, flags);
2353
2354         if (remote->remotes[index].battery.battery)
2355                 devres_release_group(&wacom->hdev->dev,
2356                                      &remote->remotes[index].battery.bat_desc);
2357
2358         if (remote->remotes[index].group.name)
2359                 devres_release_group(&wacom->hdev->dev,
2360                                      &remote->remotes[index]);
2361
2362         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2363                 if (remote->remotes[i].serial == serial) {
2364                         remote->remotes[i].serial = 0;
2365                         remote->remotes[i].group.name = NULL;
2366                         remote->remotes[i].registered = false;
2367                         remote->remotes[i].battery.battery = NULL;
2368                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2369                 }
2370         }
2371 }
2372
2373 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2374                                    unsigned int index)
2375 {
2376         struct wacom_remote *remote = wacom->remote;
2377         struct device *dev = &wacom->hdev->dev;
2378         int error, k;
2379
2380         /* A remote can pair more than once with an EKR,
2381          * check to make sure this serial isn't already paired.
2382          */
2383         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2384                 if (remote->remotes[k].serial == serial)
2385                         break;
2386         }
2387
2388         if (k < WACOM_MAX_REMOTES) {
2389                 remote->remotes[index].serial = serial;
2390                 return 0;
2391         }
2392
2393         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2394                 return -ENOMEM;
2395
2396         error = wacom_remote_create_attr_group(wacom, serial, index);
2397         if (error)
2398                 goto fail;
2399
2400         remote->remotes[index].input = wacom_allocate_input(wacom);
2401         if (!remote->remotes[index].input) {
2402                 error = -ENOMEM;
2403                 goto fail;
2404         }
2405         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2406         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2407
2408         if (!remote->remotes[index].input->name) {
2409                 error = -EINVAL;
2410                 goto fail;
2411         }
2412
2413         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2414                                                    &wacom->wacom_wac);
2415         if (error)
2416                 goto fail;
2417
2418         remote->remotes[index].serial = serial;
2419
2420         error = input_register_device(remote->remotes[index].input);
2421         if (error)
2422                 goto fail;
2423
2424         error = wacom_led_groups_alloc_and_register_one(
2425                                         &remote->remotes[index].input->dev,
2426                                         wacom, index, 3, true);
2427         if (error)
2428                 goto fail;
2429
2430         remote->remotes[index].registered = true;
2431
2432         devres_close_group(dev, &remote->remotes[index]);
2433         return 0;
2434
2435 fail:
2436         devres_release_group(dev, &remote->remotes[index]);
2437         remote->remotes[index].serial = 0;
2438         return error;
2439 }
2440
2441 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2442 {
2443         struct wacom_remote *remote = wacom->remote;
2444         int error;
2445
2446         if (!remote->remotes[index].registered)
2447                 return 0;
2448
2449         if (remote->remotes[index].battery.battery)
2450                 return 0;
2451
2452         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2453                 return 0;
2454
2455         error = __wacom_initialize_battery(wacom,
2456                                         &wacom->remote->remotes[index].battery);
2457         if (error)
2458                 return error;
2459
2460         return 0;
2461 }
2462
2463 static void wacom_remote_work(struct work_struct *work)
2464 {
2465         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2466         struct wacom_remote *remote = wacom->remote;
2467         struct wacom_remote_data data;
2468         unsigned long flags;
2469         unsigned int count;
2470         u32 serial;
2471         int i;
2472
2473         spin_lock_irqsave(&remote->remote_lock, flags);
2474
2475         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2476
2477         if (count != sizeof(data)) {
2478                 hid_err(wacom->hdev,
2479                         "workitem triggered without status available\n");
2480                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2481                 return;
2482         }
2483
2484         if (!kfifo_is_empty(&remote->remote_fifo))
2485                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2486
2487         spin_unlock_irqrestore(&remote->remote_lock, flags);
2488
2489         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2490                 serial = data.remote[i].serial;
2491                 if (data.remote[i].connected) {
2492
2493                         if (remote->remotes[i].serial == serial) {
2494                                 wacom_remote_attach_battery(wacom, i);
2495                                 continue;
2496                         }
2497
2498                         if (remote->remotes[i].serial)
2499                                 wacom_remote_destroy_one(wacom, i);
2500
2501                         wacom_remote_create_one(wacom, serial, i);
2502
2503                 } else if (remote->remotes[i].serial) {
2504                         wacom_remote_destroy_one(wacom, i);
2505                 }
2506         }
2507 }
2508
2509 static void wacom_mode_change_work(struct work_struct *work)
2510 {
2511         struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2512         struct wacom_shared *shared = wacom->wacom_wac.shared;
2513         struct wacom *wacom1 = NULL;
2514         struct wacom *wacom2 = NULL;
2515         bool is_direct = wacom->wacom_wac.is_direct_mode;
2516         int error = 0;
2517
2518         if (shared->pen) {
2519                 wacom1 = hid_get_drvdata(shared->pen);
2520                 wacom_release_resources(wacom1);
2521                 hid_hw_stop(wacom1->hdev);
2522                 wacom1->wacom_wac.has_mode_change = true;
2523                 wacom1->wacom_wac.is_direct_mode = is_direct;
2524         }
2525
2526         if (shared->touch) {
2527                 wacom2 = hid_get_drvdata(shared->touch);
2528                 wacom_release_resources(wacom2);
2529                 hid_hw_stop(wacom2->hdev);
2530                 wacom2->wacom_wac.has_mode_change = true;
2531                 wacom2->wacom_wac.is_direct_mode = is_direct;
2532         }
2533
2534         if (wacom1) {
2535                 error = wacom_parse_and_register(wacom1, false);
2536                 if (error)
2537                         return;
2538         }
2539
2540         if (wacom2) {
2541                 error = wacom_parse_and_register(wacom2, false);
2542                 if (error)
2543                         return;
2544         }
2545
2546         return;
2547 }
2548
2549 static int wacom_probe(struct hid_device *hdev,
2550                 const struct hid_device_id *id)
2551 {
2552         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2553         struct usb_device *dev = interface_to_usbdev(intf);
2554         struct wacom *wacom;
2555         struct wacom_wac *wacom_wac;
2556         struct wacom_features *features;
2557         int error;
2558
2559         if (!id->driver_data)
2560                 return -EINVAL;
2561
2562         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2563
2564         /* hid-core sets this quirk for the boot interface */
2565         hdev->quirks &= ~HID_QUIRK_NOGET;
2566
2567         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2568         if (!wacom)
2569                 return -ENOMEM;
2570
2571         hid_set_drvdata(hdev, wacom);
2572         wacom->hdev = hdev;
2573
2574         wacom_wac = &wacom->wacom_wac;
2575         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2576         features = &wacom_wac->features;
2577
2578         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2579                 error = -ENODEV;
2580                 goto fail;
2581         }
2582
2583         wacom_wac->hid_data.inputmode = -1;
2584         wacom_wac->mode_report = -1;
2585
2586         wacom->usbdev = dev;
2587         wacom->intf = intf;
2588         mutex_init(&wacom->lock);
2589         INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2590         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2591         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2592         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2593         INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2594
2595         /* ask for the report descriptor to be loaded by HID */
2596         error = hid_parse(hdev);
2597         if (error) {
2598                 hid_err(hdev, "parse failed\n");
2599                 goto fail;
2600         }
2601
2602         error = wacom_parse_and_register(wacom, false);
2603         if (error)
2604                 goto fail;
2605
2606         if (hdev->bus == BUS_BLUETOOTH) {
2607                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2608                 if (error)
2609                         hid_warn(hdev,
2610                                  "can't create sysfs speed attribute err: %d\n",
2611                                  error);
2612         }
2613
2614         return 0;
2615
2616 fail:
2617         hid_set_drvdata(hdev, NULL);
2618         return error;
2619 }
2620
2621 static void wacom_remove(struct hid_device *hdev)
2622 {
2623         struct wacom *wacom = hid_get_drvdata(hdev);
2624         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2625         struct wacom_features *features = &wacom_wac->features;
2626
2627         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2628                 hid_hw_close(hdev);
2629
2630         hid_hw_stop(hdev);
2631
2632         cancel_delayed_work_sync(&wacom->init_work);
2633         cancel_work_sync(&wacom->wireless_work);
2634         cancel_work_sync(&wacom->battery_work);
2635         cancel_work_sync(&wacom->remote_work);
2636         cancel_work_sync(&wacom->mode_change_work);
2637         if (hdev->bus == BUS_BLUETOOTH)
2638                 device_remove_file(&hdev->dev, &dev_attr_speed);
2639
2640         /* make sure we don't trigger the LEDs */
2641         wacom_led_groups_release(wacom);
2642
2643         if (wacom->wacom_wac.features.type != REMOTE)
2644                 wacom_release_resources(wacom);
2645
2646         hid_set_drvdata(hdev, NULL);
2647 }
2648
2649 #ifdef CONFIG_PM
2650 static int wacom_resume(struct hid_device *hdev)
2651 {
2652         struct wacom *wacom = hid_get_drvdata(hdev);
2653
2654         mutex_lock(&wacom->lock);
2655
2656         /* switch to wacom mode first */
2657         _wacom_query_tablet_data(wacom);
2658         wacom_led_control(wacom);
2659
2660         mutex_unlock(&wacom->lock);
2661
2662         return 0;
2663 }
2664
2665 static int wacom_reset_resume(struct hid_device *hdev)
2666 {
2667         return wacom_resume(hdev);
2668 }
2669 #endif /* CONFIG_PM */
2670
2671 static struct hid_driver wacom_driver = {
2672         .name =         "wacom",
2673         .id_table =     wacom_ids,
2674         .probe =        wacom_probe,
2675         .remove =       wacom_remove,
2676         .report =       wacom_wac_report,
2677 #ifdef CONFIG_PM
2678         .resume =       wacom_resume,
2679         .reset_resume = wacom_reset_resume,
2680 #endif
2681         .raw_event =    wacom_raw_event,
2682 };
2683 module_hid_driver(wacom_driver);
2684
2685 MODULE_VERSION(DRIVER_VERSION);
2686 MODULE_AUTHOR(DRIVER_AUTHOR);
2687 MODULE_DESCRIPTION(DRIVER_DESC);
2688 MODULE_LICENSE("GPL");