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         u32 n;
 119
 120         switch (equivalent_usage) {
 121         case WACOM_HID_WD_TOUCH_RING_SETTING:
 122                 wacom->generic_has_leds = true;
 123                 break;
 124         case HID_DG_CONTACTMAX:
 125                 /* leave touch_max as is if predefined */
 126                 if (!features->touch_max) {
 127                         /* read manually */
 128                         n = hid_report_len(field->report);
 129                         data = hid_alloc_report_buf(field->report, GFP_KERNEL);
 130                         if (!data)
 131                                 break;
 132                         data[0] = field->report->id;
 133                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 134                                                data, n, WAC_CMD_RETRIES);
 135                         if (ret == n && features->type == HID_GENERIC) {
 136                                 ret = hid_report_raw_event(hdev,
 137                                         HID_FEATURE_REPORT, data, n, 0);
 138                         } else if (ret == 2 && features->type != HID_GENERIC) {
 139                                 features->touch_max = data[1];
 140                         } else {
 141                                 features->touch_max = 16;
 142                                 hid_warn(hdev, "wacom_feature_mapping: "
 143                                          "could not get HID_DG_CONTACTMAX, "
 144                                          "defaulting to %d\n",
 145                                           features->touch_max);
 146                         }
 147                         kfree(data);
 148                 }
 149                 break;
 150         case HID_DG_INPUTMODE:
 151                 /* Ignore if value index is out of bounds. */
 152                 if (usage->usage_index >= field->report_count) {
 153                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 154                         break;
 155                 }
 156
 157                 hid_data->inputmode = field->report->id;
 158                 hid_data->inputmode_index = usage->usage_index;
 159                 break;
 160
 161         case HID_UP_DIGITIZER:
 162                 if (field->report->id == 0x0B &&
 163                     (field->application == WACOM_HID_G9_PEN ||
 164                      field->application == WACOM_HID_G11_PEN)) {
 165                         wacom->wacom_wac.mode_report = field->report->id;
 166                         wacom->wacom_wac.mode_value = 0;
 167                 }
 168                 break;
 169
 170         case WACOM_HID_WD_DATAMODE:
 171                 wacom->wacom_wac.mode_report = field->report->id;
 172                 wacom->wacom_wac.mode_value = 2;
 173                 break;
 174
 175         case WACOM_HID_UP_G9:
 176         case WACOM_HID_UP_G11:
 177                 if (field->report->id == 0x03 &&
 178                     (field->application == WACOM_HID_G9_TOUCHSCREEN ||
 179                      field->application == WACOM_HID_G11_TOUCHSCREEN)) {
 180                         wacom->wacom_wac.mode_report = field->report->id;
 181                         wacom->wacom_wac.mode_value = 0;
 182                 }
 183                 break;
 184         case WACOM_HID_WD_OFFSETLEFT:
 185         case WACOM_HID_WD_OFFSETTOP:
 186         case WACOM_HID_WD_OFFSETRIGHT:
 187         case WACOM_HID_WD_OFFSETBOTTOM:
 188                 /* read manually */
 189                 n = hid_report_len(field->report);
 190                 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
 191                 if (!data)
 192                         break;
 193                 data[0] = field->report->id;
 194                 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 195                                         data, n, WAC_CMD_RETRIES);
 196                 if (ret == n) {
 197                         ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
 198                                                    data, n, 0);
 199                 } else {
 200                         hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
 201                                  __func__);
 202                 }
 203                 kfree(data);
 204                 break;
 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         /* 2nd-generation Intuos Pro Large has incorrect Y maximum */
 295         if (hdev->vendor == USB_VENDOR_ID_WACOM &&
 296             hdev->product == 0x0358 &&
 297             WACOM_PEN_FIELD(field) &&
 298             wacom_equivalent_usage(usage->hid) == HID_GD_Y) {
 299                 field->logical_maximum = 43200;
 300         }
 301
 302         switch (usage->hid) {
 303         case HID_GD_X:
 304                 features->x_max = field->logical_maximum;
 305                 if (finger) {
 306                         features->x_phy = field->physical_maximum;
 307                         if ((features->type != BAMBOO_PT) &&
 308                             (features->type != BAMBOO_TOUCH)) {
 309                                 features->unit = field->unit;
 310                                 features->unitExpo = field->unit_exponent;
 311                         }
 312                 }
 313                 break;
 314         case HID_GD_Y:
 315                 features->y_max = field->logical_maximum;
 316                 if (finger) {
 317                         features->y_phy = field->physical_maximum;
 318                         if ((features->type != BAMBOO_PT) &&
 319                             (features->type != BAMBOO_TOUCH)) {
 320                                 features->unit = field->unit;
 321                                 features->unitExpo = field->unit_exponent;
 322                         }
 323                 }
 324                 break;
 325         case HID_DG_TIPPRESSURE:
 326                 if (pen)
 327                         features->pressure_max = field->logical_maximum;
 328                 break;
 329         }
 330
 331         if (features->type == HID_GENERIC)
 332                 wacom_wac_usage_mapping(hdev, field, usage);
 333 }
 334
 335 static void wacom_post_parse_hid(struct hid_device *hdev,
 336                                  struct wacom_features *features)
 337 {
 338         struct wacom *wacom = hid_get_drvdata(hdev);
 339         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 340
 341         if (features->type == HID_GENERIC) {
 342                 /* Any last-minute generic device setup */
 343                 if (wacom_wac->has_mode_change) {
 344                         if (wacom_wac->is_direct_mode)
 345                                 features->device_type |= WACOM_DEVICETYPE_DIRECT;
 346                         else
 347                                 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
 348                 }
 349
 350                 if (features->touch_max > 1) {
 351                         if (features->device_type & WACOM_DEVICETYPE_DIRECT)
 352                                 input_mt_init_slots(wacom_wac->touch_input,
 353                                                     wacom_wac->features.touch_max,
 354                                                     INPUT_MT_DIRECT);
 355                         else
 356                                 input_mt_init_slots(wacom_wac->touch_input,
 357                                                     wacom_wac->features.touch_max,
 358                                                     INPUT_MT_POINTER);
 359                 }
 360         }
 361 }
 362
 363 static void wacom_parse_hid(struct hid_device *hdev,
 364                            struct wacom_features *features)
 365 {
 366         struct hid_report_enum *rep_enum;
 367         struct hid_report *hreport;
 368         int i, j;
 369
 370         /* check features first */
 371         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 372         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 373                 for (i = 0; i < hreport->maxfield; i++) {
 374                         /* Ignore if report count is out of bounds. */
 375                         if (hreport->field[i]->report_count < 1)
 376                                 continue;
 377
 378                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 379                                 wacom_feature_mapping(hdev, hreport->field[i],
 380                                                 hreport->field[i]->usage + j);
 381                         }
 382                 }
 383         }
 384
 385         /* now check the input usages */
 386         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 387         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 388
 389                 if (!hreport->maxfield)
 390                         continue;
 391
 392                 for (i = 0; i < hreport->maxfield; i++)
 393                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 394                                 wacom_usage_mapping(hdev, hreport->field[i],
 395                                                 hreport->field[i]->usage + j);
 396         }
 397
 398         wacom_post_parse_hid(hdev, features);
 399 }
 400
 401 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 402 {
 403         struct wacom *wacom = hid_get_drvdata(hdev);
 404         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 405         struct hid_report *r;
 406         struct hid_report_enum *re;
 407
 408         if (hid_data->inputmode < 0)
 409                 return 0;
 410
 411         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 412         r = re->report_id_hash[hid_data->inputmode];
 413         if (r) {
 414                 r->field[0]->value[hid_data->inputmode_index] = 2;
 415                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 416         }
 417         return 0;
 418 }
 419
 420 static int wacom_set_device_mode(struct hid_device *hdev,
 421                                  struct wacom_wac *wacom_wac)
 422 {
 423         u8 *rep_data;
 424         struct hid_report *r;
 425         struct hid_report_enum *re;
 426         u32 length;
 427         int error = -ENOMEM, limit = 0;
 428
 429         if (wacom_wac->mode_report < 0)
 430                 return 0;
 431
 432         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 433         r = re->report_id_hash[wacom_wac->mode_report];
 434         if (!r)
 435                 return -EINVAL;
 436
 437         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
 438         if (!rep_data)
 439                 return -ENOMEM;
 440
 441         length = hid_report_len(r);
 442
 443         do {
 444                 rep_data[0] = wacom_wac->mode_report;
 445                 rep_data[1] = wacom_wac->mode_value;
 446
 447                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 448                                          length, 1);
 449                 if (error >= 0)
 450                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 451                                                  rep_data, length, 1);
 452         } while (error >= 0 &&
 453                  rep_data[1] != wacom_wac->mode_report &&
 454                  limit++ < WAC_MSG_RETRIES);
 455
 456         kfree(rep_data);
 457
 458         return error < 0 ? error : 0;
 459 }
 460
 461 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 462                 struct wacom_features *features)
 463 {
 464         struct wacom *wacom = hid_get_drvdata(hdev);
 465         int ret;
 466         u8 rep_data[2];
 467
 468         switch (features->type) {
 469         case GRAPHIRE_BT:
 470                 rep_data[0] = 0x03;
 471                 rep_data[1] = 0x00;
 472                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 473                                         3);
 474
 475                 if (ret >= 0) {
 476                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 477                         rep_data[1] = 0x00;
 478
 479                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 480                                                 rep_data, 2, 3);
 481
 482                         if (ret >= 0) {
 483                                 wacom->wacom_wac.bt_high_speed = speed;
 484                                 return 0;
 485                         }
 486                 }
 487
 488                 /*
 489                  * Note that if the raw queries fail, it's not a hard failure
 490                  * and it is safe to continue
 491                  */
 492                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 493                          rep_data[0], ret);
 494                 break;
 495         case INTUOS4WL:
 496                 if (speed == 1)
 497                         wacom->wacom_wac.bt_features &= ~0x20;
 498                 else
 499                         wacom->wacom_wac.bt_features |= 0x20;
 500
 501                 rep_data[0] = 0x03;
 502                 rep_data[1] = wacom->wacom_wac.bt_features;
 503
 504                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 505                                         1);
 506                 if (ret >= 0)
 507                         wacom->wacom_wac.bt_high_speed = speed;
 508                 break;
 509         }
 510
 511         return 0;
 512 }
 513
 514 /*
 515  * Switch the tablet into its most-capable mode. Wacom tablets are
 516  * typically configured to power-up in a mode which sends mouse-like
 517  * reports to the OS. To get absolute position, pressure data, etc.
 518  * from the tablet, it is necessary to switch the tablet out of this
 519  * mode and into one which sends the full range of tablet data.
 520  */
 521 static int _wacom_query_tablet_data(struct wacom *wacom)
 522 {
 523         struct hid_device *hdev = wacom->hdev;
 524         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 525         struct wacom_features *features = &wacom_wac->features;
 526
 527         if (hdev->bus == BUS_BLUETOOTH)
 528                 return wacom_bt_query_tablet_data(hdev, 1, features);
 529
 530         if (features->type != HID_GENERIC) {
 531                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 532                         if (features->type > TABLETPC) {
 533                                 /* MT Tablet PC touch */
 534                                 wacom_wac->mode_report = 3;
 535                                 wacom_wac->mode_value = 4;
 536                         } else if (features->type == WACOM_24HDT) {
 537                                 wacom_wac->mode_report = 18;
 538                                 wacom_wac->mode_value = 2;
 539                         } else if (features->type == WACOM_27QHDT) {
 540                                 wacom_wac->mode_report = 131;
 541                                 wacom_wac->mode_value = 2;
 542                         } else if (features->type == BAMBOO_PAD) {
 543                                 wacom_wac->mode_report = 2;
 544                                 wacom_wac->mode_value = 2;
 545                         }
 546                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 547                         if (features->type <= BAMBOO_PT) {
 548                                 wacom_wac->mode_report = 2;
 549                                 wacom_wac->mode_value = 2;
 550                         }
 551                 }
 552         }
 553
 554         wacom_set_device_mode(hdev, wacom_wac);
 555
 556         if (features->type == HID_GENERIC)
 557                 return wacom_hid_set_device_mode(hdev);
 558
 559         return 0;
 560 }
 561
 562 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 563                                          struct wacom_features *features)
 564 {
 565         struct wacom *wacom = hid_get_drvdata(hdev);
 566         struct usb_interface *intf = wacom->intf;
 567
 568         /* default features */
 569         features->x_fuzz = 4;
 570         features->y_fuzz = 4;
 571         features->pressure_fuzz = 0;
 572         features->distance_fuzz = 1;
 573         features->tilt_fuzz = 1;
 574
 575         /*
 576          * The wireless device HID is basic and layout conflicts with
 577          * other tablets (monitor and touch interface can look like pen).
 578          * Skip the query for this type and modify defaults based on
 579          * interface number.
 580          */
 581         if (features->type == WIRELESS && intf) {
 582                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 583                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 584                 else
 585                         features->device_type = WACOM_DEVICETYPE_NONE;
 586                 return;
 587         }
 588
 589         wacom_parse_hid(hdev, features);
 590 }
 591
 592 struct wacom_hdev_data {
 593         struct list_head list;
 594         struct kref kref;
 595         struct hid_device *dev;
 596         struct wacom_shared shared;
 597 };
 598
 599 static LIST_HEAD(wacom_udev_list);
 600 static DEFINE_MUTEX(wacom_udev_list_lock);
 601
 602 static bool compare_device_paths(struct hid_device *hdev_a,
 603                 struct hid_device *hdev_b, char separator)
 604 {
 605         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
 606         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
 607
 608         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 609                 return false;
 610
 611         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
 612 }
 613
 614 static bool wacom_are_sibling(struct hid_device *hdev,
 615                 struct hid_device *sibling)
 616 {
 617         struct wacom *wacom = hid_get_drvdata(hdev);
 618         struct wacom_features *features = &wacom->wacom_wac.features;
 619         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
 620         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
 621         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
 622         __u32 oPid = features->oPid ? features->oPid : hdev->product;
 623
 624         /* The defined oVid/oPid must match that of the sibling */
 625         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
 626                 return false;
 627         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
 628                 return false;
 629
 630         /*
 631          * Devices with the same VID/PID must share the same physical
 632          * device path, while those with different VID/PID must share
 633          * the same physical parent device path.
 634          */
 635         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
 636                 if (!compare_device_paths(hdev, sibling, '/'))
 637                         return false;
 638         } else {
 639                 if (!compare_device_paths(hdev, sibling, '.'))
 640                         return false;
 641         }
 642
 643         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
 644         if (features->type != HID_GENERIC)
 645                 return true;
 646
 647         /*
 648          * Direct-input devices may not be siblings of indirect-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         /*
 656          * Indirect-input devices may not be siblings of direct-input
 657          * devices.
 658          */
 659         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 660             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 661                 return false;
 662
 663         /* Pen devices may only be siblings of touch devices */
 664         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
 665             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
 666                 return false;
 667
 668         /* Touch devices may only be siblings of pen devices */
 669         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
 670             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
 671                 return false;
 672
 673         /*
 674          * No reason could be found for these two devices to NOT be
 675          * siblings, so there's a good chance they ARE siblings
 676          */
 677         return true;
 678 }
 679
 680 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 681 {
 682         struct wacom_hdev_data *data;
 683
 684         /* Try to find an already-probed interface from the same device */
 685         list_for_each_entry(data, &wacom_udev_list, list) {
 686                 if (compare_device_paths(hdev, data->dev, '/')) {
 687                         kref_get(&data->kref);
 688                         return data;
 689                 }
 690         }
 691
 692         /* Fallback to finding devices that appear to be "siblings" */
 693         list_for_each_entry(data, &wacom_udev_list, list) {
 694                 if (wacom_are_sibling(hdev, data->dev)) {
 695                         kref_get(&data->kref);
 696                         return data;
 697                 }
 698         }
 699
 700         return NULL;
 701 }
 702
 703 static void wacom_release_shared_data(struct kref *kref)
 704 {
 705         struct wacom_hdev_data *data =
 706                 container_of(kref, struct wacom_hdev_data, kref);
 707
 708         mutex_lock(&wacom_udev_list_lock);
 709         list_del(&data->list);
 710         mutex_unlock(&wacom_udev_list_lock);
 711
 712         kfree(data);
 713 }
 714
 715 static void wacom_remove_shared_data(void *res)
 716 {
 717         struct wacom *wacom = res;
 718         struct wacom_hdev_data *data;
 719         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 720
 721         if (wacom_wac->shared) {
 722                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 723                                     shared);
 724
 725                 if (wacom_wac->shared->touch == wacom->hdev)
 726                         wacom_wac->shared->touch = NULL;
 727                 else if (wacom_wac->shared->pen == wacom->hdev)
 728                         wacom_wac->shared->pen = NULL;
 729
 730                 kref_put(&data->kref, wacom_release_shared_data);
 731                 wacom_wac->shared = NULL;
 732         }
 733 }
 734
 735 static int wacom_add_shared_data(struct hid_device *hdev)
 736 {
 737         struct wacom *wacom = hid_get_drvdata(hdev);
 738         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 739         struct wacom_hdev_data *data;
 740         int retval = 0;
 741
 742         mutex_lock(&wacom_udev_list_lock);
 743
 744         data = wacom_get_hdev_data(hdev);
 745         if (!data) {
 746                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 747                 if (!data) {
 748                         retval = -ENOMEM;
 749                         goto out;
 750                 }
 751
 752                 kref_init(&data->kref);
 753                 data->dev = hdev;
 754                 list_add_tail(&data->list, &wacom_udev_list);
 755         }
 756
 757         wacom_wac->shared = &data->shared;
 758
 759         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
 760         if (retval) {
 761                 mutex_unlock(&wacom_udev_list_lock);
 762                 wacom_remove_shared_data(wacom);
 763                 return retval;
 764         }
 765
 766         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 767                 wacom_wac->shared->touch = hdev;
 768         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 769                 wacom_wac->shared->pen = hdev;
 770
 771 out:
 772         mutex_unlock(&wacom_udev_list_lock);
 773         return retval;
 774 }
 775
 776 static int wacom_led_control(struct wacom *wacom)
 777 {
 778         unsigned char *buf;
 779         int retval;
 780         unsigned char report_id = WAC_CMD_LED_CONTROL;
 781         int buf_size = 9;
 782
 783         if (!wacom->led.groups)
 784                 return -ENOTSUPP;
 785
 786         if (wacom->wacom_wac.features.type == REMOTE)
 787                 return -ENOTSUPP;
 788
 789         if (wacom->wacom_wac.pid) { /* wireless connected */
 790                 report_id = WAC_CMD_WL_LED_CONTROL;
 791                 buf_size = 13;
 792         }
 793         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 794                 report_id = WAC_CMD_WL_INTUOSP2;
 795                 buf_size = 51;
 796         }
 797         buf = kzalloc(buf_size, GFP_KERNEL);
 798         if (!buf)
 799                 return -ENOMEM;
 800
 801         if (wacom->wacom_wac.features.type == HID_GENERIC) {
 802                 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
 803                 buf[1] = wacom->led.llv;
 804                 buf[2] = wacom->led.groups[0].select & 0x03;
 805
 806         } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
 807             wacom->wacom_wac.features.type <= INTUOSPL)) {
 808                 /*
 809                  * Touch Ring and crop mark LED luminance may take on
 810                  * one of four values:
 811                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 812                  */
 813                 int ring_led = wacom->led.groups[0].select & 0x03;
 814                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 815                 int crop_lum = 0;
 816                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 817
 818                 buf[0] = report_id;
 819                 if (wacom->wacom_wac.pid) {
 820                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 821                                          buf, buf_size, WAC_CMD_RETRIES);
 822                         buf[0] = report_id;
 823                         buf[4] = led_bits;
 824                 } else
 825                         buf[1] = led_bits;
 826         }
 827         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 828                 buf[0] = report_id;
 829                 buf[4] = 100; // Power Connection LED (ORANGE)
 830                 buf[5] = 100; // BT Connection LED (BLUE)
 831                 buf[6] = 100; // Paper Mode (RED?)
 832                 buf[7] = 100; // Paper Mode (GREEN?)
 833                 buf[8] = 100; // Paper Mode (BLUE?)
 834                 buf[9] = wacom->led.llv;
 835                 buf[10] = wacom->led.groups[0].select & 0x03;
 836         }
 837         else {
 838                 int led = wacom->led.groups[0].select | 0x4;
 839
 840                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 841                     wacom->wacom_wac.features.type == WACOM_24HD)
 842                         led |= (wacom->led.groups[1].select << 4) | 0x40;
 843
 844                 buf[0] = report_id;
 845                 buf[1] = led;
 846                 buf[2] = wacom->led.llv;
 847                 buf[3] = wacom->led.hlv;
 848                 buf[4] = wacom->led.img_lum;
 849         }
 850
 851         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 852                                   WAC_CMD_RETRIES);
 853         kfree(buf);
 854
 855         return retval;
 856 }
 857
 858 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 859                 const unsigned len, const void *img)
 860 {
 861         unsigned char *buf;
 862         int i, retval;
 863         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 864
 865         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 866         if (!buf)
 867                 return -ENOMEM;
 868
 869         /* Send 'start' command */
 870         buf[0] = WAC_CMD_ICON_START;
 871         buf[1] = 1;
 872         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 873                                   WAC_CMD_RETRIES);
 874         if (retval < 0)
 875                 goto out;
 876
 877         buf[0] = xfer_id;
 878         buf[1] = button_id & 0x07;
 879         for (i = 0; i < 4; i++) {
 880                 buf[2] = i;
 881                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 882
 883                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 884                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 885                 if (retval < 0)
 886                         break;
 887         }
 888
 889         /* Send 'stop' */
 890         buf[0] = WAC_CMD_ICON_START;
 891         buf[1] = 0;
 892         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 893                          WAC_CMD_RETRIES);
 894
 895 out:
 896         kfree(buf);
 897         return retval;
 898 }
 899
 900 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 901                                       const char *buf, size_t count)
 902 {
 903         struct hid_device *hdev = to_hid_device(dev);
 904         struct wacom *wacom = hid_get_drvdata(hdev);
 905         unsigned int id;
 906         int err;
 907
 908         err = kstrtouint(buf, 10, &id);
 909         if (err)
 910                 return err;
 911
 912         mutex_lock(&wacom->lock);
 913
 914         wacom->led.groups[set_id].select = id & 0x3;
 915         err = wacom_led_control(wacom);
 916
 917         mutex_unlock(&wacom->lock);
 918
 919         return err < 0 ? err : count;
 920 }
 921
 922 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 923 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 924         struct device_attribute *attr, const char *buf, size_t count)   \
 925 {                                                                       \
 926         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 927 }                                                                       \
 928 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 929         struct device_attribute *attr, char *buf)                       \
 930 {                                                                       \
 931         struct hid_device *hdev = to_hid_device(dev);\
 932         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 933         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 934                          wacom->led.groups[SET_ID].select);             \
 935 }                                                                       \
 936 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 937                     wacom_led##SET_ID##_select_show,                    \
 938                     wacom_led##SET_ID##_select_store)
 939
 940 DEVICE_LED_SELECT_ATTR(0);
 941 DEVICE_LED_SELECT_ATTR(1);
 942
 943 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 944                                      const char *buf, size_t count)
 945 {
 946         unsigned int value;
 947         int err;
 948
 949         err = kstrtouint(buf, 10, &value);
 950         if (err)
 951                 return err;
 952
 953         mutex_lock(&wacom->lock);
 954
 955         *dest = value & 0x7f;
 956         err = wacom_led_control(wacom);
 957
 958         mutex_unlock(&wacom->lock);
 959
 960         return err < 0 ? err : count;
 961 }
 962
 963 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 964 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 965         struct device_attribute *attr, const char *buf, size_t count)   \
 966 {                                                                       \
 967         struct hid_device *hdev = to_hid_device(dev);\
 968         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 969                                                                         \
 970         return wacom_luminance_store(wacom, &wacom->led.field,          \
 971                                      buf, count);                       \
 972 }                                                                       \
 973 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 974         struct device_attribute *attr, char *buf)                       \
 975 {                                                                       \
 976         struct wacom *wacom = dev_get_drvdata(dev);                     \
 977         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 978 }                                                                       \
 979 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 980                    wacom_##name##_luminance_show,                       \
 981                    wacom_##name##_luminance_store)
 982
 983 DEVICE_LUMINANCE_ATTR(status0, llv);
 984 DEVICE_LUMINANCE_ATTR(status1, hlv);
 985 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 986
 987 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 988                                         const char *buf, size_t count)
 989 {
 990         struct hid_device *hdev = to_hid_device(dev);
 991         struct wacom *wacom = hid_get_drvdata(hdev);
 992         int err;
 993         unsigned len;
 994         u8 xfer_id;
 995
 996         if (hdev->bus == BUS_BLUETOOTH) {
 997                 len = 256;
 998                 xfer_id = WAC_CMD_ICON_BT_XFER;
 999         } else {
1000                 len = 1024;
1001                 xfer_id = WAC_CMD_ICON_XFER;
1002         }
1003
1004         if (count != len)
1005                 return -EINVAL;
1006
1007         mutex_lock(&wacom->lock);
1008
1009         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1010
1011         mutex_unlock(&wacom->lock);
1012
1013         return err < 0 ? err : count;
1014 }
1015
1016 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
1017 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
1018         struct device_attribute *attr, const char *buf, size_t count)   \
1019 {                                                                       \
1020         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
1021 }                                                                       \
1022 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
1023                    NULL, wacom_btnimg##BUTTON_ID##_store)
1024
1025 DEVICE_BTNIMG_ATTR(0);
1026 DEVICE_BTNIMG_ATTR(1);
1027 DEVICE_BTNIMG_ATTR(2);
1028 DEVICE_BTNIMG_ATTR(3);
1029 DEVICE_BTNIMG_ATTR(4);
1030 DEVICE_BTNIMG_ATTR(5);
1031 DEVICE_BTNIMG_ATTR(6);
1032 DEVICE_BTNIMG_ATTR(7);
1033
1034 static struct attribute *cintiq_led_attrs[] = {
1035         &dev_attr_status_led0_select.attr,
1036         &dev_attr_status_led1_select.attr,
1037         NULL
1038 };
1039
1040 static struct attribute_group cintiq_led_attr_group = {
1041         .name = "wacom_led",
1042         .attrs = cintiq_led_attrs,
1043 };
1044
1045 static struct attribute *intuos4_led_attrs[] = {
1046         &dev_attr_status0_luminance.attr,
1047         &dev_attr_status1_luminance.attr,
1048         &dev_attr_status_led0_select.attr,
1049         &dev_attr_buttons_luminance.attr,
1050         &dev_attr_button0_rawimg.attr,
1051         &dev_attr_button1_rawimg.attr,
1052         &dev_attr_button2_rawimg.attr,
1053         &dev_attr_button3_rawimg.attr,
1054         &dev_attr_button4_rawimg.attr,
1055         &dev_attr_button5_rawimg.attr,
1056         &dev_attr_button6_rawimg.attr,
1057         &dev_attr_button7_rawimg.attr,
1058         NULL
1059 };
1060
1061 static struct attribute_group intuos4_led_attr_group = {
1062         .name = "wacom_led",
1063         .attrs = intuos4_led_attrs,
1064 };
1065
1066 static struct attribute *intuos5_led_attrs[] = {
1067         &dev_attr_status0_luminance.attr,
1068         &dev_attr_status_led0_select.attr,
1069         NULL
1070 };
1071
1072 static struct attribute_group intuos5_led_attr_group = {
1073         .name = "wacom_led",
1074         .attrs = intuos5_led_attrs,
1075 };
1076
1077 static struct attribute *generic_led_attrs[] = {
1078         &dev_attr_status0_luminance.attr,
1079         &dev_attr_status_led0_select.attr,
1080         NULL
1081 };
1082
1083 static struct attribute_group generic_led_attr_group = {
1084         .name = "wacom_led",
1085         .attrs = generic_led_attrs,
1086 };
1087
1088 struct wacom_sysfs_group_devres {
1089         struct attribute_group *group;
1090         struct kobject *root;
1091 };
1092
1093 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1094 {
1095         struct wacom_sysfs_group_devres *devres = res;
1096         struct kobject *kobj = devres->root;
1097
1098         dev_dbg(dev, "%s: dropping reference to %s\n",
1099                 __func__, devres->group->name);
1100         sysfs_remove_group(kobj, devres->group);
1101 }
1102
1103 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1104                                            struct kobject *root,
1105                                            struct attribute_group *group)
1106 {
1107         struct wacom_sysfs_group_devres *devres;
1108         int error;
1109
1110         devres = devres_alloc(wacom_devm_sysfs_group_release,
1111                               sizeof(struct wacom_sysfs_group_devres),
1112                               GFP_KERNEL);
1113         if (!devres)
1114                 return -ENOMEM;
1115
1116         devres->group = group;
1117         devres->root = root;
1118
1119         error = sysfs_create_group(devres->root, group);
1120         if (error) {
1121                 devres_free(devres);
1122                 return error;
1123         }
1124
1125         devres_add(&wacom->hdev->dev, devres);
1126
1127         return 0;
1128 }
1129
1130 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1131                                          struct attribute_group *group)
1132 {
1133         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1134                                                group);
1135 }
1136
1137 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1138 {
1139         struct wacom *wacom = led->wacom;
1140
1141         if (wacom->led.max_hlv)
1142                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1143
1144         if (wacom->led.max_llv)
1145                 return led->llv * LED_FULL / wacom->led.max_llv;
1146
1147         /* device doesn't support brightness tuning */
1148         return LED_FULL;
1149 }
1150
1151 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1152 {
1153         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1154         struct wacom *wacom = led->wacom;
1155
1156         if (wacom->led.groups[led->group].select != led->id)
1157                 return LED_OFF;
1158
1159         return wacom_leds_brightness_get(led);
1160 }
1161
1162 static int wacom_led_brightness_set(struct led_classdev *cdev,
1163                                     enum led_brightness brightness)
1164 {
1165         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1166         struct wacom *wacom = led->wacom;
1167         int error;
1168
1169         mutex_lock(&wacom->lock);
1170
1171         if (!wacom->led.groups || (brightness == LED_OFF &&
1172             wacom->led.groups[led->group].select != led->id)) {
1173                 error = 0;
1174                 goto out;
1175         }
1176
1177         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1178         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1179
1180         wacom->led.groups[led->group].select = led->id;
1181
1182         error = wacom_led_control(wacom);
1183
1184 out:
1185         mutex_unlock(&wacom->lock);
1186
1187         return error;
1188 }
1189
1190 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1191                                                enum led_brightness brightness)
1192 {
1193 }
1194
1195 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1196                                   struct wacom_led *led, unsigned int group,
1197                                   unsigned int id, bool read_only)
1198 {
1199         int error;
1200         char *name;
1201
1202         name = devm_kasprintf(dev, GFP_KERNEL,
1203                               "%s::wacom-%d.%d",
1204                               dev_name(dev),
1205                               group,
1206                               id);
1207         if (!name)
1208                 return -ENOMEM;
1209
1210         if (!read_only) {
1211                 led->trigger.name = name;
1212                 error = devm_led_trigger_register(dev, &led->trigger);
1213                 if (error) {
1214                         hid_err(wacom->hdev,
1215                                 "failed to register LED trigger %s: %d\n",
1216                                 led->cdev.name, error);
1217                         return error;
1218                 }
1219         }
1220
1221         led->group = group;
1222         led->id = id;
1223         led->wacom = wacom;
1224         led->llv = wacom->led.llv;
1225         led->hlv = wacom->led.hlv;
1226         led->cdev.name = name;
1227         led->cdev.max_brightness = LED_FULL;
1228         led->cdev.flags = LED_HW_PLUGGABLE;
1229         led->cdev.brightness_get = __wacom_led_brightness_get;
1230         if (!read_only) {
1231                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1232                 led->cdev.default_trigger = led->cdev.name;
1233         } else {
1234                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1235         }
1236
1237         error = devm_led_classdev_register(dev, &led->cdev);
1238         if (error) {
1239                 hid_err(wacom->hdev,
1240                         "failed to register LED %s: %d\n",
1241                         led->cdev.name, error);
1242                 led->cdev.name = NULL;
1243                 return error;
1244         }
1245
1246         return 0;
1247 }
1248
1249 static void wacom_led_groups_release_one(void *data)
1250 {
1251         struct wacom_group_leds *group = data;
1252
1253         devres_release_group(group->dev, group);
1254 }
1255
1256 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1257                                                    struct wacom *wacom,
1258                                                    int group_id, int count,
1259                                                    bool read_only)
1260 {
1261         struct wacom_led *leds;
1262         int i, error;
1263
1264         if (group_id >= wacom->led.count || count <= 0)
1265                 return -EINVAL;
1266
1267         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1268                 return -ENOMEM;
1269
1270         leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1271         if (!leds) {
1272                 error = -ENOMEM;
1273                 goto err;
1274         }
1275
1276         wacom->led.groups[group_id].leds = leds;
1277         wacom->led.groups[group_id].count = count;
1278
1279         for (i = 0; i < count; i++) {
1280                 error = wacom_led_register_one(dev, wacom, &leds[i],
1281                                                group_id, i, read_only);
1282                 if (error)
1283                         goto err;
1284         }
1285
1286         wacom->led.groups[group_id].dev = dev;
1287
1288         devres_close_group(dev, &wacom->led.groups[group_id]);
1289
1290         /*
1291          * There is a bug (?) in devm_led_classdev_register() in which its
1292          * increments the refcount of the parent. If the parent is an input
1293          * device, that means the ref count never reaches 0 when
1294          * devm_input_device_release() gets called.
1295          * This means that the LEDs are still there after disconnect.
1296          * Manually force the release of the group so that the leds are released
1297          * once we are done using them.
1298          */
1299         error = devm_add_action_or_reset(&wacom->hdev->dev,
1300                                          wacom_led_groups_release_one,
1301                                          &wacom->led.groups[group_id]);
1302         if (error)
1303                 return error;
1304
1305         return 0;
1306
1307 err:
1308         devres_release_group(dev, &wacom->led.groups[group_id]);
1309         return error;
1310 }
1311
1312 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1313                                  unsigned int id)
1314 {
1315         struct wacom_group_leds *group;
1316
1317         if (group_id >= wacom->led.count)
1318                 return NULL;
1319
1320         group = &wacom->led.groups[group_id];
1321
1322         if (!group->leds)
1323                 return NULL;
1324
1325         id %= group->count;
1326
1327         return &group->leds[id];
1328 }
1329
1330 /**
1331  * wacom_led_next: gives the next available led with a wacom trigger.
1332  *
1333  * returns the next available struct wacom_led which has its default trigger
1334  * or the current one if none is available.
1335  */
1336 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1337 {
1338         struct wacom_led *next_led;
1339         int group, next;
1340
1341         if (!wacom || !cur)
1342                 return NULL;
1343
1344         group = cur->group;
1345         next = cur->id;
1346
1347         do {
1348                 next_led = wacom_led_find(wacom, group, ++next);
1349                 if (!next_led || next_led == cur)
1350                         return next_led;
1351         } while (next_led->cdev.trigger != &next_led->trigger);
1352
1353         return next_led;
1354 }
1355
1356 static void wacom_led_groups_release(void *data)
1357 {
1358         struct wacom *wacom = data;
1359
1360         wacom->led.groups = NULL;
1361         wacom->led.count = 0;
1362 }
1363
1364 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1365 {
1366         struct device *dev = &wacom->hdev->dev;
1367         struct wacom_group_leds *groups;
1368         int error;
1369
1370         groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1371                               GFP_KERNEL);
1372         if (!groups)
1373                 return -ENOMEM;
1374
1375         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1376         if (error)
1377                 return error;
1378
1379         wacom->led.groups = groups;
1380         wacom->led.count = count;
1381
1382         return 0;
1383 }
1384
1385 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1386                                          int led_per_group, bool read_only)
1387 {
1388         struct device *dev;
1389         int i, error;
1390
1391         if (!wacom->wacom_wac.pad_input)
1392                 return -EINVAL;
1393
1394         dev = &wacom->wacom_wac.pad_input->dev;
1395
1396         error = wacom_led_groups_allocate(wacom, group_count);
1397         if (error)
1398                 return error;
1399
1400         for (i = 0; i < group_count; i++) {
1401                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1402                                                                 led_per_group,
1403                                                                 read_only);
1404                 if (error)
1405                         return error;
1406         }
1407
1408         return 0;
1409 }
1410
1411 int wacom_initialize_leds(struct wacom *wacom)
1412 {
1413         int error;
1414
1415         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1416                 return 0;
1417
1418         /* Initialize default values */
1419         switch (wacom->wacom_wac.features.type) {
1420         case HID_GENERIC:
1421                 if (!wacom->generic_has_leds)
1422                         return 0;
1423                 wacom->led.llv = 100;
1424                 wacom->led.max_llv = 100;
1425
1426                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1427                 if (error) {
1428                         hid_err(wacom->hdev,
1429                                 "cannot create leds err: %d\n", error);
1430                         return error;
1431                 }
1432
1433                 error = wacom_devm_sysfs_create_group(wacom,
1434                                                       &generic_led_attr_group);
1435                 break;
1436
1437         case INTUOS4S:
1438         case INTUOS4:
1439         case INTUOS4WL:
1440         case INTUOS4L:
1441                 wacom->led.llv = 10;
1442                 wacom->led.hlv = 20;
1443                 wacom->led.max_llv = 127;
1444                 wacom->led.max_hlv = 127;
1445                 wacom->led.img_lum = 10;
1446
1447                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1448                 if (error) {
1449                         hid_err(wacom->hdev,
1450                                 "cannot create leds err: %d\n", error);
1451                         return error;
1452                 }
1453
1454                 error = wacom_devm_sysfs_create_group(wacom,
1455                                                       &intuos4_led_attr_group);
1456                 break;
1457
1458         case WACOM_24HD:
1459         case WACOM_21UX2:
1460                 wacom->led.llv = 0;
1461                 wacom->led.hlv = 0;
1462                 wacom->led.img_lum = 0;
1463
1464                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1465                 if (error) {
1466                         hid_err(wacom->hdev,
1467                                 "cannot create leds err: %d\n", error);
1468                         return error;
1469                 }
1470
1471                 error = wacom_devm_sysfs_create_group(wacom,
1472                                                       &cintiq_led_attr_group);
1473                 break;
1474
1475         case INTUOS5S:
1476         case INTUOS5:
1477         case INTUOS5L:
1478         case INTUOSPS:
1479         case INTUOSPM:
1480         case INTUOSPL:
1481                 wacom->led.llv = 32;
1482                 wacom->led.max_llv = 96;
1483
1484                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1485                 if (error) {
1486                         hid_err(wacom->hdev,
1487                                 "cannot create leds err: %d\n", error);
1488                         return error;
1489                 }
1490
1491                 error = wacom_devm_sysfs_create_group(wacom,
1492                                                       &intuos5_led_attr_group);
1493                 break;
1494
1495         case INTUOSP2_BT:
1496                 wacom->led.llv = 50;
1497                 wacom->led.max_llv = 100;
1498                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1499                 if (error) {
1500                         hid_err(wacom->hdev,
1501                                 "cannot create leds err: %d\n", error);
1502                         return error;
1503                 }
1504                 return 0;
1505
1506         case REMOTE:
1507                 wacom->led.llv = 255;
1508                 wacom->led.max_llv = 255;
1509                 error = wacom_led_groups_allocate(wacom, 5);
1510                 if (error) {
1511                         hid_err(wacom->hdev,
1512                                 "cannot create leds err: %d\n", error);
1513                         return error;
1514                 }
1515                 return 0;
1516
1517         default:
1518                 return 0;
1519         }
1520
1521         if (error) {
1522                 hid_err(wacom->hdev,
1523                         "cannot create sysfs group err: %d\n", error);
1524                 return error;
1525         }
1526
1527         return 0;
1528 }
1529
1530 static void wacom_init_work(struct work_struct *work)
1531 {
1532         struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1533
1534         _wacom_query_tablet_data(wacom);
1535         wacom_led_control(wacom);
1536 }
1537
1538 static void wacom_query_tablet_data(struct wacom *wacom)
1539 {
1540         schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1541 }
1542
1543 static enum power_supply_property wacom_battery_props[] = {
1544         POWER_SUPPLY_PROP_MODEL_NAME,
1545         POWER_SUPPLY_PROP_PRESENT,
1546         POWER_SUPPLY_PROP_STATUS,
1547         POWER_SUPPLY_PROP_SCOPE,
1548         POWER_SUPPLY_PROP_CAPACITY
1549 };
1550
1551 static int wacom_battery_get_property(struct power_supply *psy,
1552                                       enum power_supply_property psp,
1553                                       union power_supply_propval *val)
1554 {
1555         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1556         int ret = 0;
1557
1558         switch (psp) {
1559                 case POWER_SUPPLY_PROP_MODEL_NAME:
1560                         val->strval = battery->wacom->wacom_wac.name;
1561                         break;
1562                 case POWER_SUPPLY_PROP_PRESENT:
1563                         val->intval = battery->bat_connected;
1564                         break;
1565                 case POWER_SUPPLY_PROP_SCOPE:
1566                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1567                         break;
1568                 case POWER_SUPPLY_PROP_CAPACITY:
1569                         val->intval = battery->battery_capacity;
1570                         break;
1571                 case POWER_SUPPLY_PROP_STATUS:
1572                         if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1573                                 val->intval = battery->bat_status;
1574                         else if (battery->bat_charging)
1575                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1576                         else if (battery->battery_capacity == 100 &&
1577                                     battery->ps_connected)
1578                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1579                         else if (battery->ps_connected)
1580                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1581                         else
1582                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1583                         break;
1584                 default:
1585                         ret = -EINVAL;
1586                         break;
1587         }
1588
1589         return ret;
1590 }
1591
1592 static int __wacom_initialize_battery(struct wacom *wacom,
1593                                       struct wacom_battery *battery)
1594 {
1595         static atomic_t battery_no = ATOMIC_INIT(0);
1596         struct device *dev = &wacom->hdev->dev;
1597         struct power_supply_config psy_cfg = { .drv_data = battery, };
1598         struct power_supply *ps_bat;
1599         struct power_supply_desc *bat_desc = &battery->bat_desc;
1600         unsigned long n;
1601         int error;
1602
1603         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1604                 return -ENOMEM;
1605
1606         battery->wacom = wacom;
1607
1608         n = atomic_inc_return(&battery_no) - 1;
1609
1610         bat_desc->properties = wacom_battery_props;
1611         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1612         bat_desc->get_property = wacom_battery_get_property;
1613         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1614         bat_desc->name = battery->bat_name;
1615         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1616         bat_desc->use_for_apm = 0;
1617
1618         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1619         if (IS_ERR(ps_bat)) {
1620                 error = PTR_ERR(ps_bat);
1621                 goto err;
1622         }
1623
1624         power_supply_powers(ps_bat, &wacom->hdev->dev);
1625
1626         battery->battery = ps_bat;
1627
1628         devres_close_group(dev, bat_desc);
1629         return 0;
1630
1631 err:
1632         devres_release_group(dev, bat_desc);
1633         return error;
1634 }
1635
1636 static int wacom_initialize_battery(struct wacom *wacom)
1637 {
1638         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1639                 return __wacom_initialize_battery(wacom, &wacom->battery);
1640
1641         return 0;
1642 }
1643
1644 static void wacom_destroy_battery(struct wacom *wacom)
1645 {
1646         if (wacom->battery.battery) {
1647                 devres_release_group(&wacom->hdev->dev,
1648                                      &wacom->battery.bat_desc);
1649                 wacom->battery.battery = NULL;
1650         }
1651 }
1652
1653 static ssize_t wacom_show_speed(struct device *dev,
1654                                 struct device_attribute
1655                                 *attr, char *buf)
1656 {
1657         struct hid_device *hdev = to_hid_device(dev);
1658         struct wacom *wacom = hid_get_drvdata(hdev);
1659
1660         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1661 }
1662
1663 static ssize_t wacom_store_speed(struct device *dev,
1664                                 struct device_attribute *attr,
1665                                 const char *buf, size_t count)
1666 {
1667         struct hid_device *hdev = to_hid_device(dev);
1668         struct wacom *wacom = hid_get_drvdata(hdev);
1669         u8 new_speed;
1670
1671         if (kstrtou8(buf, 0, &new_speed))
1672                 return -EINVAL;
1673
1674         if (new_speed != 0 && new_speed != 1)
1675                 return -EINVAL;
1676
1677         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1678
1679         return count;
1680 }
1681
1682 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1683                 wacom_show_speed, wacom_store_speed);
1684
1685
1686 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1687                                       struct kobj_attribute *kattr,
1688                                       char *buf, int index)
1689 {
1690         struct device *dev = kobj_to_dev(kobj->parent);
1691         struct hid_device *hdev = to_hid_device(dev);
1692         struct wacom *wacom = hid_get_drvdata(hdev);
1693         u8 mode;
1694
1695         mode = wacom->led.groups[index].select;
1696         return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1697 }
1698
1699 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1700 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1701                                struct kobj_attribute *kattr, char *buf) \
1702 {                                                                       \
1703         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1704 }                                                                       \
1705 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1706         .attr = {.name = "remote_mode",                                 \
1707                 .mode = DEV_ATTR_RO_PERM},                              \
1708         .show = wacom_show_remote##SET_ID##_mode,                       \
1709 };                                                                      \
1710 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1711         &remote##SET_ID##_mode_attr.attr,                               \
1712         NULL                                                            \
1713 };                                                                      \
1714 static struct attribute_group remote##SET_ID##_serial_group = {         \
1715         .name = NULL,                                                   \
1716         .attrs = remote##SET_ID##_serial_attrs,                         \
1717 }
1718
1719 DEVICE_EKR_ATTR_GROUP(0);
1720 DEVICE_EKR_ATTR_GROUP(1);
1721 DEVICE_EKR_ATTR_GROUP(2);
1722 DEVICE_EKR_ATTR_GROUP(3);
1723 DEVICE_EKR_ATTR_GROUP(4);
1724
1725 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1726                                           int index)
1727 {
1728         int error = 0;
1729         struct wacom_remote *remote = wacom->remote;
1730
1731         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1732                                                           GFP_KERNEL,
1733                                                           "%d", serial);
1734         if (!remote->remotes[index].group.name)
1735                 return -ENOMEM;
1736
1737         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1738                                                 &remote->remotes[index].group);
1739         if (error) {
1740                 remote->remotes[index].group.name = NULL;
1741                 hid_err(wacom->hdev,
1742                         "cannot create sysfs group err: %d\n", error);
1743                 return error;
1744         }
1745
1746         return 0;
1747 }
1748
1749 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1750 {
1751         const size_t buf_size = 2;
1752         unsigned char *buf;
1753         int retval;
1754
1755         buf = kzalloc(buf_size, GFP_KERNEL);
1756         if (!buf)
1757                 return -ENOMEM;
1758
1759         buf[0] = WAC_CMD_DELETE_PAIRING;
1760         buf[1] = selector;
1761
1762         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1763                                   buf_size, WAC_CMD_RETRIES);
1764         kfree(buf);
1765
1766         return retval;
1767 }
1768
1769 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1770                                          struct kobj_attribute *attr,
1771                                          const char *buf, size_t count)
1772 {
1773         unsigned char selector = 0;
1774         struct device *dev = kobj_to_dev(kobj->parent);
1775         struct hid_device *hdev = to_hid_device(dev);
1776         struct wacom *wacom = hid_get_drvdata(hdev);
1777         int err;
1778
1779         if (!strncmp(buf, "*\n", 2)) {
1780                 selector = WAC_CMD_UNPAIR_ALL;
1781         } else {
1782                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1783                          buf);
1784                 return -1;
1785         }
1786
1787         mutex_lock(&wacom->lock);
1788
1789         err = wacom_cmd_unpair_remote(wacom, selector);
1790         mutex_unlock(&wacom->lock);
1791
1792         return err < 0 ? err : count;
1793 }
1794
1795 static struct kobj_attribute unpair_remote_attr = {
1796         .attr = {.name = "unpair_remote", .mode = 0200},
1797         .store = wacom_store_unpair_remote,
1798 };
1799
1800 static const struct attribute *remote_unpair_attrs[] = {
1801         &unpair_remote_attr.attr,
1802         NULL
1803 };
1804
1805 static void wacom_remotes_destroy(void *data)
1806 {
1807         struct wacom *wacom = data;
1808         struct wacom_remote *remote = wacom->remote;
1809
1810         if (!remote)
1811                 return;
1812
1813         kobject_put(remote->remote_dir);
1814         kfifo_free(&remote->remote_fifo);
1815         wacom->remote = NULL;
1816 }
1817
1818 static int wacom_initialize_remotes(struct wacom *wacom)
1819 {
1820         int error = 0;
1821         struct wacom_remote *remote;
1822         int i;
1823
1824         if (wacom->wacom_wac.features.type != REMOTE)
1825                 return 0;
1826
1827         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1828                               GFP_KERNEL);
1829         if (!remote)
1830                 return -ENOMEM;
1831
1832         wacom->remote = remote;
1833
1834         spin_lock_init(&remote->remote_lock);
1835
1836         error = kfifo_alloc(&remote->remote_fifo,
1837                         5 * sizeof(struct wacom_remote_data),
1838                         GFP_KERNEL);
1839         if (error) {
1840                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1841                 return -ENOMEM;
1842         }
1843
1844         remote->remotes[0].group = remote0_serial_group;
1845         remote->remotes[1].group = remote1_serial_group;
1846         remote->remotes[2].group = remote2_serial_group;
1847         remote->remotes[3].group = remote3_serial_group;
1848         remote->remotes[4].group = remote4_serial_group;
1849
1850         remote->remote_dir = kobject_create_and_add("wacom_remote",
1851                                                     &wacom->hdev->dev.kobj);
1852         if (!remote->remote_dir)
1853                 return -ENOMEM;
1854
1855         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1856
1857         if (error) {
1858                 hid_err(wacom->hdev,
1859                         "cannot create sysfs group err: %d\n", error);
1860                 return error;
1861         }
1862
1863         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1864                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1865                 remote->remotes[i].serial = 0;
1866         }
1867
1868         error = devm_add_action_or_reset(&wacom->hdev->dev,
1869                                          wacom_remotes_destroy, wacom);
1870         if (error)
1871                 return error;
1872
1873         return 0;
1874 }
1875
1876 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1877 {
1878         struct input_dev *input_dev;
1879         struct hid_device *hdev = wacom->hdev;
1880         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1881
1882         input_dev = devm_input_allocate_device(&hdev->dev);
1883         if (!input_dev)
1884                 return NULL;
1885
1886         input_dev->name = wacom_wac->features.name;
1887         input_dev->phys = hdev->phys;
1888         input_dev->dev.parent = &hdev->dev;
1889         input_dev->open = wacom_open;
1890         input_dev->close = wacom_close;
1891         input_dev->uniq = hdev->uniq;
1892         input_dev->id.bustype = hdev->bus;
1893         input_dev->id.vendor  = hdev->vendor;
1894         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1895         input_dev->id.version = hdev->version;
1896         input_set_drvdata(input_dev, wacom);
1897
1898         return input_dev;
1899 }
1900
1901 static int wacom_allocate_inputs(struct wacom *wacom)
1902 {
1903         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1904
1905         wacom_wac->pen_input = wacom_allocate_input(wacom);
1906         wacom_wac->touch_input = wacom_allocate_input(wacom);
1907         wacom_wac->pad_input = wacom_allocate_input(wacom);
1908         if (!wacom_wac->pen_input ||
1909             !wacom_wac->touch_input ||
1910             !wacom_wac->pad_input)
1911                 return -ENOMEM;
1912
1913         wacom_wac->pen_input->name = wacom_wac->pen_name;
1914         wacom_wac->touch_input->name = wacom_wac->touch_name;
1915         wacom_wac->pad_input->name = wacom_wac->pad_name;
1916
1917         return 0;
1918 }
1919
1920 static int wacom_register_inputs(struct wacom *wacom)
1921 {
1922         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1923         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1924         int error = 0;
1925
1926         pen_input_dev = wacom_wac->pen_input;
1927         touch_input_dev = wacom_wac->touch_input;
1928         pad_input_dev = wacom_wac->pad_input;
1929
1930         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1931                 return -EINVAL;
1932
1933         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1934         if (error) {
1935                 /* no pen in use on this interface */
1936                 input_free_device(pen_input_dev);
1937                 wacom_wac->pen_input = NULL;
1938                 pen_input_dev = NULL;
1939         } else {
1940                 error = input_register_device(pen_input_dev);
1941                 if (error)
1942                         goto fail;
1943         }
1944
1945         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1946         if (error) {
1947                 /* no touch in use on this interface */
1948                 input_free_device(touch_input_dev);
1949                 wacom_wac->touch_input = NULL;
1950                 touch_input_dev = NULL;
1951         } else {
1952                 error = input_register_device(touch_input_dev);
1953                 if (error)
1954                         goto fail;
1955         }
1956
1957         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1958         if (error) {
1959                 /* no pad in use on this interface */
1960                 input_free_device(pad_input_dev);
1961                 wacom_wac->pad_input = NULL;
1962                 pad_input_dev = NULL;
1963         } else {
1964                 error = input_register_device(pad_input_dev);
1965                 if (error)
1966                         goto fail;
1967         }
1968
1969         return 0;
1970
1971 fail:
1972         wacom_wac->pad_input = NULL;
1973         wacom_wac->touch_input = NULL;
1974         wacom_wac->pen_input = NULL;
1975         return error;
1976 }
1977
1978 /*
1979  * Not all devices report physical dimensions from HID.
1980  * Compute the default from hardcoded logical dimension
1981  * and resolution before driver overwrites them.
1982  */
1983 static void wacom_set_default_phy(struct wacom_features *features)
1984 {
1985         if (features->x_resolution) {
1986                 features->x_phy = (features->x_max * 100) /
1987                                         features->x_resolution;
1988                 features->y_phy = (features->y_max * 100) /
1989                                         features->y_resolution;
1990         }
1991 }
1992
1993 static void wacom_calculate_res(struct wacom_features *features)
1994 {
1995         /* set unit to "100th of a mm" for devices not reported by HID */
1996         if (!features->unit) {
1997                 features->unit = 0x11;
1998                 features->unitExpo = -3;
1999         }
2000
2001         features->x_resolution = wacom_calc_hid_res(features->x_max,
2002                                                     features->x_phy,
2003                                                     features->unit,
2004                                                     features->unitExpo);
2005         features->y_resolution = wacom_calc_hid_res(features->y_max,
2006                                                     features->y_phy,
2007                                                     features->unit,
2008                                                     features->unitExpo);
2009 }
2010
2011 void wacom_battery_work(struct work_struct *work)
2012 {
2013         struct wacom *wacom = container_of(work, struct wacom, battery_work);
2014
2015         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2016              !wacom->battery.battery) {
2017                 wacom_initialize_battery(wacom);
2018         }
2019         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2020                  wacom->battery.battery) {
2021                 wacom_destroy_battery(wacom);
2022         }
2023 }
2024
2025 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2026 {
2027         struct hid_report_enum *report_enum;
2028         struct hid_report *report;
2029         size_t size = 0;
2030
2031         report_enum = hdev->report_enum + HID_INPUT_REPORT;
2032
2033         list_for_each_entry(report, &report_enum->report_list, list) {
2034                 size_t report_size = hid_report_len(report);
2035                 if (report_size > size)
2036                         size = report_size;
2037         }
2038
2039         return size;
2040 }
2041
2042 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2043 {
2044         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2045         struct wacom_features *features = &wacom_wac->features;
2046         char name[WACOM_NAME_MAX];
2047
2048         /* Generic devices name unspecified */
2049         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2050                 char *product_name = wacom->hdev->name;
2051
2052                 if (hid_is_usb(wacom->hdev)) {
2053                         struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2054                         struct usb_device *dev = interface_to_usbdev(intf);
2055                         product_name = dev->product;
2056                 }
2057
2058                 if (wacom->hdev->bus == BUS_I2C) {
2059                         snprintf(name, sizeof(name), "%s %X",
2060                                  features->name, wacom->hdev->product);
2061                 } else if (strstr(product_name, "Wacom") ||
2062                            strstr(product_name, "wacom") ||
2063                            strstr(product_name, "WACOM")) {
2064                         strlcpy(name, product_name, sizeof(name));
2065                 } else {
2066                         snprintf(name, sizeof(name), "Wacom %s", product_name);
2067                 }
2068
2069                 /* strip out excess whitespaces */
2070                 while (1) {
2071                         char *gap = strstr(name, "  ");
2072                         if (gap == NULL)
2073                                 break;
2074                         /* shift everything including the terminator */
2075                         memmove(gap, gap+1, strlen(gap));
2076                 }
2077
2078                 /* get rid of trailing whitespace */
2079                 if (name[strlen(name)-1] == ' ')
2080                         name[strlen(name)-1] = '\0';
2081         } else {
2082                 strlcpy(name, features->name, sizeof(name));
2083         }
2084
2085         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2086                  name, suffix);
2087
2088         /* Append the device type to the name */
2089         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2090                 "%s%s Pen", name, suffix);
2091         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2092                 "%s%s Finger", name, suffix);
2093         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2094                 "%s%s Pad", name, suffix);
2095 }
2096
2097 static void wacom_release_resources(struct wacom *wacom)
2098 {
2099         struct hid_device *hdev = wacom->hdev;
2100
2101         if (!wacom->resources)
2102                 return;
2103
2104         devres_release_group(&hdev->dev, wacom);
2105
2106         wacom->resources = false;
2107
2108         wacom->wacom_wac.pen_input = NULL;
2109         wacom->wacom_wac.touch_input = NULL;
2110         wacom->wacom_wac.pad_input = NULL;
2111 }
2112
2113 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2114 {
2115         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2116                 wacom_wac->shared->type = wacom_wac->features.type;
2117                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2118         }
2119
2120         if (wacom_wac->has_mute_touch_switch) {
2121                 wacom_wac->shared->has_mute_touch_switch = true;
2122                 wacom_wac->shared->is_touch_on = true;
2123         }
2124
2125         if (wacom_wac->shared->has_mute_touch_switch &&
2126             wacom_wac->shared->touch_input) {
2127                 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2128                 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2129                                      SW_MUTE_DEVICE);
2130         }
2131 }
2132
2133 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2134 {
2135         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2136         struct wacom_features *features = &wacom_wac->features;
2137         struct hid_device *hdev = wacom->hdev;
2138         int error;
2139         unsigned int connect_mask = HID_CONNECT_HIDRAW;
2140
2141         features->pktlen = wacom_compute_pktlen(hdev);
2142         if (features->pktlen > WACOM_PKGLEN_MAX)
2143                 return -EINVAL;
2144
2145         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2146                 return -ENOMEM;
2147
2148         wacom->resources = true;
2149
2150         error = wacom_allocate_inputs(wacom);
2151         if (error)
2152                 goto fail;
2153
2154         /*
2155          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2156          * into debug mode for the touch part.
2157          * We ignore the other interfaces.
2158          */
2159         if (features->type == BAMBOO_PAD) {
2160                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2161                         features->type = HID_GENERIC;
2162                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2163                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2164                         error = -ENODEV;
2165                         goto fail;
2166                 }
2167         }
2168
2169         /* set the default size in case we do not get them from hid */
2170         wacom_set_default_phy(features);
2171
2172         /* Retrieve the physical and logical size for touch devices */
2173         wacom_retrieve_hid_descriptor(hdev, features);
2174         wacom_setup_device_quirks(wacom);
2175
2176         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2177             features->type != WIRELESS) {
2178                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2179
2180                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2181                          hdev->name,
2182                          error ? "Ignoring" : "Assuming pen");
2183
2184                 if (error)
2185                         goto fail;
2186
2187                 features->device_type |= WACOM_DEVICETYPE_PEN;
2188         }
2189
2190         wacom_calculate_res(features);
2191
2192         wacom_update_name(wacom, wireless ? " (WL)" : "");
2193
2194         /* pen only Bamboo neither support touch nor pad */
2195         if ((features->type == BAMBOO_PEN) &&
2196             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2197             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2198                 error = -ENODEV;
2199                 goto fail;
2200         }
2201
2202         error = wacom_add_shared_data(hdev);
2203         if (error)
2204                 goto fail;
2205
2206         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2207              (features->quirks & WACOM_QUIRK_BATTERY)) {
2208                 error = wacom_initialize_battery(wacom);
2209                 if (error)
2210                         goto fail;
2211         }
2212
2213         error = wacom_register_inputs(wacom);
2214         if (error)
2215                 goto fail;
2216
2217         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2218                 error = wacom_initialize_leds(wacom);
2219                 if (error)
2220                         goto fail;
2221
2222                 error = wacom_initialize_remotes(wacom);
2223                 if (error)
2224                         goto fail;
2225         }
2226
2227         if (features->type == HID_GENERIC)
2228                 connect_mask |= HID_CONNECT_DRIVER;
2229
2230         /* Regular HID work starts now */
2231         error = hid_hw_start(hdev, connect_mask);
2232         if (error) {
2233                 hid_err(hdev, "hw start failed\n");
2234                 goto fail;
2235         }
2236
2237         if (!wireless) {
2238                 /* Note that if query fails it is not a hard failure */
2239                 wacom_query_tablet_data(wacom);
2240         }
2241
2242         /* touch only Bamboo doesn't support pen */
2243         if ((features->type == BAMBOO_TOUCH) &&
2244             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2245                 cancel_delayed_work_sync(&wacom->init_work);
2246                 _wacom_query_tablet_data(wacom);
2247                 error = -ENODEV;
2248                 goto fail_quirks;
2249         }
2250
2251         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2252                 error = hid_hw_open(hdev);
2253
2254         wacom_set_shared_values(wacom_wac);
2255         devres_close_group(&hdev->dev, wacom);
2256
2257         return 0;
2258
2259 fail_quirks:
2260         hid_hw_stop(hdev);
2261 fail:
2262         wacom_release_resources(wacom);
2263         return error;
2264 }
2265
2266 static void wacom_wireless_work(struct work_struct *work)
2267 {
2268         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2269         struct usb_device *usbdev = wacom->usbdev;
2270         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2271         struct hid_device *hdev1, *hdev2;
2272         struct wacom *wacom1, *wacom2;
2273         struct wacom_wac *wacom_wac1, *wacom_wac2;
2274         int error;
2275
2276         /*
2277          * Regardless if this is a disconnect or a new tablet,
2278          * remove any existing input and battery devices.
2279          */
2280
2281         wacom_destroy_battery(wacom);
2282
2283         if (!usbdev)
2284                 return;
2285
2286         /* Stylus interface */
2287         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2288         wacom1 = hid_get_drvdata(hdev1);
2289         wacom_wac1 = &(wacom1->wacom_wac);
2290         wacom_release_resources(wacom1);
2291
2292         /* Touch interface */
2293         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2294         wacom2 = hid_get_drvdata(hdev2);
2295         wacom_wac2 = &(wacom2->wacom_wac);
2296         wacom_release_resources(wacom2);
2297
2298         if (wacom_wac->pid == 0) {
2299                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2300         } else {
2301                 const struct hid_device_id *id = wacom_ids;
2302
2303                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2304                          wacom_wac->pid);
2305
2306                 while (id->bus) {
2307                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2308                             id->product == wacom_wac->pid)
2309                                 break;
2310                         id++;
2311                 }
2312
2313                 if (!id->bus) {
2314                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2315                         return;
2316                 }
2317
2318                 /* Stylus interface */
2319                 wacom_wac1->features =
2320                         *((struct wacom_features *)id->driver_data);
2321
2322                 wacom_wac1->pid = wacom_wac->pid;
2323                 hid_hw_stop(hdev1);
2324                 error = wacom_parse_and_register(wacom1, true);
2325                 if (error)
2326                         goto fail;
2327
2328                 /* Touch interface */
2329                 if (wacom_wac1->features.touch_max ||
2330                     (wacom_wac1->features.type >= INTUOSHT &&
2331                     wacom_wac1->features.type <= BAMBOO_PT)) {
2332                         wacom_wac2->features =
2333                                 *((struct wacom_features *)id->driver_data);
2334                         wacom_wac2->pid = wacom_wac->pid;
2335                         hid_hw_stop(hdev2);
2336                         error = wacom_parse_and_register(wacom2, true);
2337                         if (error)
2338                                 goto fail;
2339                 }
2340
2341                 strlcpy(wacom_wac->name, wacom_wac1->name,
2342                         sizeof(wacom_wac->name));
2343                 error = wacom_initialize_battery(wacom);
2344                 if (error)
2345                         goto fail;
2346         }
2347
2348         return;
2349
2350 fail:
2351         wacom_release_resources(wacom1);
2352         wacom_release_resources(wacom2);
2353         return;
2354 }
2355
2356 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2357 {
2358         struct wacom_remote *remote = wacom->remote;
2359         u32 serial = remote->remotes[index].serial;
2360         int i;
2361         unsigned long flags;
2362
2363         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2364                 if (remote->remotes[i].serial == serial) {
2365
2366                         spin_lock_irqsave(&remote->remote_lock, flags);
2367                         remote->remotes[i].registered = false;
2368                         spin_unlock_irqrestore(&remote->remote_lock, flags);
2369
2370                         if (remote->remotes[i].battery.battery)
2371                                 devres_release_group(&wacom->hdev->dev,
2372                                                      &remote->remotes[i].battery.bat_desc);
2373
2374                         if (remote->remotes[i].group.name)
2375                                 devres_release_group(&wacom->hdev->dev,
2376                                                      &remote->remotes[i]);
2377
2378                         remote->remotes[i].serial = 0;
2379                         remote->remotes[i].group.name = NULL;
2380                         remote->remotes[i].battery.battery = NULL;
2381                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2382                 }
2383         }
2384 }
2385
2386 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2387                                    unsigned int index)
2388 {
2389         struct wacom_remote *remote = wacom->remote;
2390         struct device *dev = &wacom->hdev->dev;
2391         int error, k;
2392
2393         /* A remote can pair more than once with an EKR,
2394          * check to make sure this serial isn't already paired.
2395          */
2396         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2397                 if (remote->remotes[k].serial == serial)
2398                         break;
2399         }
2400
2401         if (k < WACOM_MAX_REMOTES) {
2402                 remote->remotes[index].serial = serial;
2403                 return 0;
2404         }
2405
2406         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2407                 return -ENOMEM;
2408
2409         error = wacom_remote_create_attr_group(wacom, serial, index);
2410         if (error)
2411                 goto fail;
2412
2413         remote->remotes[index].input = wacom_allocate_input(wacom);
2414         if (!remote->remotes[index].input) {
2415                 error = -ENOMEM;
2416                 goto fail;
2417         }
2418         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2419         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2420
2421         if (!remote->remotes[index].input->name) {
2422                 error = -EINVAL;
2423                 goto fail;
2424         }
2425
2426         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2427                                                    &wacom->wacom_wac);
2428         if (error)
2429                 goto fail;
2430
2431         remote->remotes[index].serial = serial;
2432
2433         error = input_register_device(remote->remotes[index].input);
2434         if (error)
2435                 goto fail;
2436
2437         error = wacom_led_groups_alloc_and_register_one(
2438                                         &remote->remotes[index].input->dev,
2439                                         wacom, index, 3, true);
2440         if (error)
2441                 goto fail;
2442
2443         remote->remotes[index].registered = true;
2444
2445         devres_close_group(dev, &remote->remotes[index]);
2446         return 0;
2447
2448 fail:
2449         devres_release_group(dev, &remote->remotes[index]);
2450         remote->remotes[index].serial = 0;
2451         return error;
2452 }
2453
2454 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2455 {
2456         struct wacom_remote *remote = wacom->remote;
2457         int error;
2458
2459         if (!remote->remotes[index].registered)
2460                 return 0;
2461
2462         if (remote->remotes[index].battery.battery)
2463                 return 0;
2464
2465         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2466                 return 0;
2467
2468         error = __wacom_initialize_battery(wacom,
2469                                         &wacom->remote->remotes[index].battery);
2470         if (error)
2471                 return error;
2472
2473         return 0;
2474 }
2475
2476 static void wacom_remote_work(struct work_struct *work)
2477 {
2478         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2479         struct wacom_remote *remote = wacom->remote;
2480         struct wacom_remote_data data;
2481         unsigned long flags;
2482         unsigned int count;
2483         u32 serial;
2484         int i;
2485
2486         spin_lock_irqsave(&remote->remote_lock, flags);
2487
2488         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2489
2490         if (count != sizeof(data)) {
2491                 hid_err(wacom->hdev,
2492                         "workitem triggered without status available\n");
2493                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2494                 return;
2495         }
2496
2497         if (!kfifo_is_empty(&remote->remote_fifo))
2498                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2499
2500         spin_unlock_irqrestore(&remote->remote_lock, flags);
2501
2502         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2503                 serial = data.remote[i].serial;
2504                 if (data.remote[i].connected) {
2505
2506                         if (remote->remotes[i].serial == serial) {
2507                                 wacom_remote_attach_battery(wacom, i);
2508                                 continue;
2509                         }
2510
2511                         if (remote->remotes[i].serial)
2512                                 wacom_remote_destroy_one(wacom, i);
2513
2514                         wacom_remote_create_one(wacom, serial, i);
2515
2516                 } else if (remote->remotes[i].serial) {
2517                         wacom_remote_destroy_one(wacom, i);
2518                 }
2519         }
2520 }
2521
2522 static void wacom_mode_change_work(struct work_struct *work)
2523 {
2524         struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2525         struct wacom_shared *shared = wacom->wacom_wac.shared;
2526         struct wacom *wacom1 = NULL;
2527         struct wacom *wacom2 = NULL;
2528         bool is_direct = wacom->wacom_wac.is_direct_mode;
2529         int error = 0;
2530
2531         if (shared->pen) {
2532                 wacom1 = hid_get_drvdata(shared->pen);
2533                 wacom_release_resources(wacom1);
2534                 hid_hw_stop(wacom1->hdev);
2535                 wacom1->wacom_wac.has_mode_change = true;
2536                 wacom1->wacom_wac.is_direct_mode = is_direct;
2537         }
2538
2539         if (shared->touch) {
2540                 wacom2 = hid_get_drvdata(shared->touch);
2541                 wacom_release_resources(wacom2);
2542                 hid_hw_stop(wacom2->hdev);
2543                 wacom2->wacom_wac.has_mode_change = true;
2544                 wacom2->wacom_wac.is_direct_mode = is_direct;
2545         }
2546
2547         if (wacom1) {
2548                 error = wacom_parse_and_register(wacom1, false);
2549                 if (error)
2550                         return;
2551         }
2552
2553         if (wacom2) {
2554                 error = wacom_parse_and_register(wacom2, false);
2555                 if (error)
2556                         return;
2557         }
2558
2559         return;
2560 }
2561
2562 static int wacom_probe(struct hid_device *hdev,
2563                 const struct hid_device_id *id)
2564 {
2565         struct wacom *wacom;
2566         struct wacom_wac *wacom_wac;
2567         struct wacom_features *features;
2568         int error;
2569
2570         if (!id->driver_data)
2571                 return -EINVAL;
2572
2573         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2574
2575         /* hid-core sets this quirk for the boot interface */
2576         hdev->quirks &= ~HID_QUIRK_NOGET;
2577
2578         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2579         if (!wacom)
2580                 return -ENOMEM;
2581
2582         hid_set_drvdata(hdev, wacom);
2583         wacom->hdev = hdev;
2584
2585         wacom_wac = &wacom->wacom_wac;
2586         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2587         features = &wacom_wac->features;
2588
2589         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2590                 error = -ENODEV;
2591                 goto fail;
2592         }
2593
2594         wacom_wac->hid_data.inputmode = -1;
2595         wacom_wac->mode_report = -1;
2596
2597         if (hid_is_usb(hdev)) {
2598                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2599                 struct usb_device *dev = interface_to_usbdev(intf);
2600
2601                 wacom->usbdev = dev;
2602                 wacom->intf = intf;
2603         }
2604
2605         mutex_init(&wacom->lock);
2606         INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2607         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2608         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2609         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2610         INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2611
2612         /* ask for the report descriptor to be loaded by HID */
2613         error = hid_parse(hdev);
2614         if (error) {
2615                 hid_err(hdev, "parse failed\n");
2616                 goto fail;
2617         }
2618
2619         error = wacom_parse_and_register(wacom, false);
2620         if (error)
2621                 goto fail;
2622
2623         if (hdev->bus == BUS_BLUETOOTH) {
2624                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2625                 if (error)
2626                         hid_warn(hdev,
2627                                  "can't create sysfs speed attribute err: %d\n",
2628                                  error);
2629         }
2630
2631         return 0;
2632
2633 fail:
2634         hid_set_drvdata(hdev, NULL);
2635         return error;
2636 }
2637
2638 static void wacom_remove(struct hid_device *hdev)
2639 {
2640         struct wacom *wacom = hid_get_drvdata(hdev);
2641         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2642         struct wacom_features *features = &wacom_wac->features;
2643
2644         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2645                 hid_hw_close(hdev);
2646
2647         hid_hw_stop(hdev);
2648
2649         cancel_delayed_work_sync(&wacom->init_work);
2650         cancel_work_sync(&wacom->wireless_work);
2651         cancel_work_sync(&wacom->battery_work);
2652         cancel_work_sync(&wacom->remote_work);
2653         cancel_work_sync(&wacom->mode_change_work);
2654         if (hdev->bus == BUS_BLUETOOTH)
2655                 device_remove_file(&hdev->dev, &dev_attr_speed);
2656
2657         /* make sure we don't trigger the LEDs */
2658         wacom_led_groups_release(wacom);
2659
2660         if (wacom->wacom_wac.features.type != REMOTE)
2661                 wacom_release_resources(wacom);
2662
2663         hid_set_drvdata(hdev, NULL);
2664 }
2665
2666 #ifdef CONFIG_PM
2667 static int wacom_resume(struct hid_device *hdev)
2668 {
2669         struct wacom *wacom = hid_get_drvdata(hdev);
2670
2671         mutex_lock(&wacom->lock);
2672
2673         /* switch to wacom mode first */
2674         _wacom_query_tablet_data(wacom);
2675         wacom_led_control(wacom);
2676
2677         mutex_unlock(&wacom->lock);
2678
2679         return 0;
2680 }
2681
2682 static int wacom_reset_resume(struct hid_device *hdev)
2683 {
2684         return wacom_resume(hdev);
2685 }
2686 #endif /* CONFIG_PM */
2687
2688 static struct hid_driver wacom_driver = {
2689         .name =         "wacom",
2690         .id_table =     wacom_ids,
2691         .probe =        wacom_probe,
2692         .remove =       wacom_remove,
2693         .report =       wacom_wac_report,
2694 #ifdef CONFIG_PM
2695         .resume =       wacom_resume,
2696         .reset_resume = wacom_reset_resume,
2697 #endif
2698         .raw_event =    wacom_raw_event,
2699 };
2700 module_hid_driver(wacom_driver);
2701
2702 MODULE_VERSION(DRIVER_VERSION);
2703 MODULE_AUTHOR(DRIVER_AUTHOR);
2704 MODULE_DESCRIPTION(DRIVER_DESC);
2705 MODULE_LICENSE("GPL");