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 void wacom_wac_queue_insert(struct hid_device *hdev,
  60                                    struct kfifo_rec_ptr_2 *fifo,
  61                                    u8 *raw_data, int size)
  62 {
  63         bool warned = false;
  64
  65         while (kfifo_avail(fifo) < size) {
  66                 if (!warned)
  67                         hid_warn(hdev, "%s: kfifo has filled, starting to drop events\n", __func__);
  68                 warned = true;
  69
  70                 kfifo_skip(fifo);
  71         }
  72
  73         kfifo_in(fifo, raw_data, size);
  74 }
  75
  76 static void wacom_wac_queue_flush(struct hid_device *hdev,
  77                                   struct kfifo_rec_ptr_2 *fifo)
  78 {
  79         while (!kfifo_is_empty(fifo)) {
  80                 u8 buf[WACOM_PKGLEN_MAX];
  81                 int size;
  82                 int err;
  83
  84                 size = kfifo_out(fifo, buf, sizeof(buf));
  85                 err = hid_report_raw_event(hdev, HID_INPUT_REPORT, buf, size, false);
  86                 if (err) {
  87                         hid_warn(hdev, "%s: unable to flush event due to error %d\n",
  88                                  __func__, err);
  89                 }
  90         }
  91 }
  92
  93 static int wacom_wac_pen_serial_enforce(struct hid_device *hdev,
  94                 struct hid_report *report, u8 *raw_data, int size)
  95 {
  96         struct wacom *wacom = hid_get_drvdata(hdev);
  97         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
  98         struct wacom_features *features = &wacom_wac->features;
  99         bool flush = false;
 100         bool insert = false;
 101         int i, j;
 102
 103         if (wacom_wac->serial[0] || !(features->quirks & WACOM_QUIRK_TOOLSERIAL))
 104                 return 0;
 105
 106         /* Queue events which have invalid tool type or serial number */
 107         for (i = 0; i < report->maxfield; i++) {
 108                 for (j = 0; j < report->field[i]->maxusage; j++) {
 109                         struct hid_field *field = report->field[i];
 110                         struct hid_usage *usage = &field->usage[j];
 111                         unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
 112                         unsigned int offset;
 113                         unsigned int size;
 114                         unsigned int value;
 115
 116                         if (equivalent_usage != HID_DG_INRANGE &&
 117                             equivalent_usage != HID_DG_TOOLSERIALNUMBER &&
 118                             equivalent_usage != WACOM_HID_WD_SERIALHI &&
 119                             equivalent_usage != WACOM_HID_WD_TOOLTYPE)
 120                                 continue;
 121
 122                         offset = field->report_offset;
 123                         size = field->report_size;
 124                         value = hid_field_extract(hdev, raw_data+1, offset + j * size, size);
 125
 126                         /* If we go out of range, we need to flush the queue ASAP */
 127                         if (equivalent_usage == HID_DG_INRANGE)
 128                                 value = !value;
 129
 130                         if (value) {
 131                                 flush = true;
 132                                 switch (equivalent_usage) {
 133                                 case HID_DG_TOOLSERIALNUMBER:
 134                                         wacom_wac->serial[0] = value;
 135                                         break;
 136
 137                                 case WACOM_HID_WD_SERIALHI:
 138                                         wacom_wac->serial[0] |= ((__u64)value) << 32;
 139                                         break;
 140
 141                                 case WACOM_HID_WD_TOOLTYPE:
 142                                         wacom_wac->id[0] = value;
 143                                         break;
 144                                 }
 145                         }
 146                         else {
 147                                 insert = true;
 148                         }
 149                 }
 150         }
 151
 152         if (flush)
 153                 wacom_wac_queue_flush(hdev, &wacom_wac->pen_fifo);
 154         else if (insert)
 155                 wacom_wac_queue_insert(hdev, &wacom_wac->pen_fifo, raw_data, size);
 156
 157         return insert && !flush;
 158 }
 159
 160 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
 161                 u8 *raw_data, int size)
 162 {
 163         struct wacom *wacom = hid_get_drvdata(hdev);
 164
 165         if (size > WACOM_PKGLEN_MAX)
 166                 return 1;
 167
 168         if (wacom_wac_pen_serial_enforce(hdev, report, raw_data, size))
 169                 return -1;
 170
 171         memcpy(wacom->wacom_wac.data, raw_data, size);
 172
 173         wacom_wac_irq(&wacom->wacom_wac, size);
 174
 175         return 0;
 176 }
 177
 178 static int wacom_open(struct input_dev *dev)
 179 {
 180         struct wacom *wacom = input_get_drvdata(dev);
 181
 182         return hid_hw_open(wacom->hdev);
 183 }
 184
 185 static void wacom_close(struct input_dev *dev)
 186 {
 187         struct wacom *wacom = input_get_drvdata(dev);
 188
 189         /*
 190          * wacom->hdev should never be null, but surprisingly, I had the case
 191          * once while unplugging the Wacom Wireless Receiver.
 192          */
 193         if (wacom->hdev)
 194                 hid_hw_close(wacom->hdev);
 195 }
 196
 197 /*
 198  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
 199  */
 200 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
 201                                unsigned unit, int exponent)
 202 {
 203         struct hid_field field = {
 204                 .logical_maximum = logical_extents,
 205                 .physical_maximum = physical_extents,
 206                 .unit = unit,
 207                 .unit_exponent = exponent,
 208         };
 209
 210         return hidinput_calc_abs_res(&field, ABS_X);
 211 }
 212
 213 static void wacom_feature_mapping(struct hid_device *hdev,
 214                 struct hid_field *field, struct hid_usage *usage)
 215 {
 216         struct wacom *wacom = hid_get_drvdata(hdev);
 217         struct wacom_features *features = &wacom->wacom_wac.features;
 218         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 219         unsigned int equivalent_usage = wacom_equivalent_usage(usage->hid);
 220         u8 *data;
 221         int ret;
 222         u32 n;
 223
 224         switch (equivalent_usage) {
 225         case HID_DG_CONTACTMAX:
 226                 /* leave touch_max as is if predefined */
 227                 if (!features->touch_max) {
 228                         /* read manually */
 229                         data = kzalloc(2, GFP_KERNEL);
 230                         if (!data)
 231                                 break;
 232                         data[0] = field->report->id;
 233                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 234                                                 data, 2, WAC_CMD_RETRIES);
 235                         if (ret == 2) {
 236                                 features->touch_max = data[1];
 237                         } else {
 238                                 features->touch_max = 16;
 239                                 hid_warn(hdev, "wacom_feature_mapping: "
 240                                          "could not get HID_DG_CONTACTMAX, "
 241                                          "defaulting to %d\n",
 242                                           features->touch_max);
 243                         }
 244                         kfree(data);
 245                 }
 246                 break;
 247         case HID_DG_INPUTMODE:
 248                 /* Ignore if value index is out of bounds. */
 249                 if (usage->usage_index >= field->report_count) {
 250                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 251                         break;
 252                 }
 253
 254                 hid_data->inputmode = field->report->id;
 255                 hid_data->inputmode_index = usage->usage_index;
 256                 break;
 257
 258         case HID_UP_DIGITIZER:
 259                 if (field->report->id == 0x0B &&
 260                     (field->application == WACOM_HID_G9_PEN ||
 261                      field->application == WACOM_HID_G11_PEN)) {
 262                         wacom->wacom_wac.mode_report = field->report->id;
 263                         wacom->wacom_wac.mode_value = 0;
 264                 }
 265                 break;
 266
 267         case WACOM_HID_WD_DATAMODE:
 268                 wacom->wacom_wac.mode_report = field->report->id;
 269                 wacom->wacom_wac.mode_value = 2;
 270                 break;
 271
 272         case WACOM_HID_UP_G9:
 273         case WACOM_HID_UP_G11:
 274                 if (field->report->id == 0x03 &&
 275                     (field->application == WACOM_HID_G9_TOUCHSCREEN ||
 276                      field->application == WACOM_HID_G11_TOUCHSCREEN)) {
 277                         wacom->wacom_wac.mode_report = field->report->id;
 278                         wacom->wacom_wac.mode_value = 0;
 279                 }
 280                 break;
 281         case WACOM_HID_WD_OFFSETLEFT:
 282         case WACOM_HID_WD_OFFSETTOP:
 283         case WACOM_HID_WD_OFFSETRIGHT:
 284         case WACOM_HID_WD_OFFSETBOTTOM:
 285                 /* read manually */
 286                 n = hid_report_len(field->report);
 287                 data = hid_alloc_report_buf(field->report, GFP_KERNEL);
 288                 if (!data)
 289                         break;
 290                 data[0] = field->report->id;
 291                 ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 292                                         data, n, WAC_CMD_RETRIES);
 293                 if (ret == n) {
 294                         ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT,
 295                                                    data, n, 0);
 296                 } else {
 297                         hid_warn(hdev, "%s: could not retrieve sensor offsets\n",
 298                                  __func__);
 299                 }
 300                 kfree(data);
 301                 break;
 302         }
 303
 304         if (hdev->vendor == USB_VENDOR_ID_WACOM &&
 305             hdev->product == 0x4200 /* Dell Canvas 27 */ &&
 306             field->application == HID_UP_MSVENDOR) {
 307                 wacom->wacom_wac.mode_report = field->report->id;
 308                 wacom->wacom_wac.mode_value = 2;
 309         }
 310 }
 311
 312 /*
 313  * Interface Descriptor of wacom devices can be incomplete and
 314  * inconsistent so wacom_features table is used to store stylus
 315  * device's packet lengths, various maximum values, and tablet
 316  * resolution based on product ID's.
 317  *
 318  * For devices that contain 2 interfaces, wacom_features table is
 319  * inaccurate for the touch interface.  Since the Interface Descriptor
 320  * for touch interfaces has pretty complete data, this function exists
 321  * to query tablet for this missing information instead of hard coding in
 322  * an additional table.
 323  *
 324  * A typical Interface Descriptor for a stylus will contain a
 325  * boot mouse application collection that is not of interest and this
 326  * function will ignore it.
 327  *
 328  * It also contains a digitizer application collection that also is not
 329  * of interest since any information it contains would be duplicate
 330  * of what is in wacom_features. Usually it defines a report of an array
 331  * of bytes that could be used as max length of the stylus packet returned.
 332  * If it happens to define a Digitizer-Stylus Physical Collection then
 333  * the X and Y logical values contain valid data but it is ignored.
 334  *
 335  * A typical Interface Descriptor for a touch interface will contain a
 336  * Digitizer-Finger Physical Collection which will define both logical
 337  * X/Y maximum as well as the physical size of tablet. Since touch
 338  * interfaces haven't supported pressure or distance, this is enough
 339  * information to override invalid values in the wacom_features table.
 340  *
 341  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 342  * data. We deal with them after returning from this function.
 343  */
 344 static void wacom_usage_mapping(struct hid_device *hdev,
 345                 struct hid_field *field, struct hid_usage *usage)
 346 {
 347         struct wacom *wacom = hid_get_drvdata(hdev);
 348         struct wacom_features *features = &wacom->wacom_wac.features;
 349         bool finger = WACOM_FINGER_FIELD(field);
 350         bool pen = WACOM_PEN_FIELD(field);
 351
 352         /*
 353         * Requiring Stylus Usage will ignore boot mouse
 354         * X/Y values and some cases of invalid Digitizer X/Y
 355         * values commonly reported.
 356         */
 357         if (pen)
 358                 features->device_type |= WACOM_DEVICETYPE_PEN;
 359         else if (finger)
 360                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 361         else
 362                 return;
 363
 364         /*
 365          * Bamboo models do not support HID_DG_CONTACTMAX.
 366          * And, Bamboo Pen only descriptor contains touch.
 367          */
 368         if (features->type > BAMBOO_PT) {
 369                 /* ISDv4 touch devices at least supports one touch point */
 370                 if (finger && !features->touch_max)
 371                         features->touch_max = 1;
 372         }
 373
 374         /*
 375          * ISDv4 devices which predate HID's adoption of the
 376          * HID_DG_BARELSWITCH2 usage use 0x000D0000 in its
 377          * position instead. We can accurately detect if a
 378          * usage with that value should be HID_DG_BARRELSWITCH2
 379          * based on the surrounding usages, which have remained
 380          * constant across generations.
 381          */
 382         if (features->type == HID_GENERIC &&
 383             usage->hid == 0x000D0000 &&
 384             field->application == HID_DG_PEN &&
 385             field->physical == HID_DG_STYLUS) {
 386                 int i = usage->usage_index;
 387
 388                 if (i-4 >= 0 && i+1 < field->maxusage &&
 389                     field->usage[i-4].hid == HID_DG_TIPSWITCH &&
 390                     field->usage[i-3].hid == HID_DG_BARRELSWITCH &&
 391                     field->usage[i-2].hid == HID_DG_ERASER &&
 392                     field->usage[i-1].hid == HID_DG_INVERT &&
 393                     field->usage[i+1].hid == HID_DG_INRANGE) {
 394                         usage->hid = HID_DG_BARRELSWITCH2;
 395                 }
 396         }
 397
 398         switch (usage->hid) {
 399         case HID_GD_X:
 400                 features->x_max = field->logical_maximum;
 401                 if (finger) {
 402                         features->x_phy = field->physical_maximum;
 403                         if ((features->type != BAMBOO_PT) &&
 404                             (features->type != BAMBOO_TOUCH)) {
 405                                 features->unit = field->unit;
 406                                 features->unitExpo = field->unit_exponent;
 407                         }
 408                 }
 409                 break;
 410         case HID_GD_Y:
 411                 features->y_max = field->logical_maximum;
 412                 if (finger) {
 413                         features->y_phy = field->physical_maximum;
 414                         if ((features->type != BAMBOO_PT) &&
 415                             (features->type != BAMBOO_TOUCH)) {
 416                                 features->unit = field->unit;
 417                                 features->unitExpo = field->unit_exponent;
 418                         }
 419                 }
 420                 break;
 421         case HID_DG_TIPPRESSURE:
 422                 if (pen)
 423                         features->pressure_max = field->logical_maximum;
 424                 break;
 425         }
 426
 427         if (features->type == HID_GENERIC)
 428                 wacom_wac_usage_mapping(hdev, field, usage);
 429 }
 430
 431 static void wacom_post_parse_hid(struct hid_device *hdev,
 432                                  struct wacom_features *features)
 433 {
 434         struct wacom *wacom = hid_get_drvdata(hdev);
 435         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 436
 437         if (features->type == HID_GENERIC) {
 438                 /* Any last-minute generic device setup */
 439                 if (wacom_wac->has_mode_change) {
 440                         if (wacom_wac->is_direct_mode)
 441                                 features->device_type |= WACOM_DEVICETYPE_DIRECT;
 442                         else
 443                                 features->device_type &= ~WACOM_DEVICETYPE_DIRECT;
 444                 }
 445
 446                 if (features->touch_max > 1) {
 447                         if (features->device_type & WACOM_DEVICETYPE_DIRECT)
 448                                 input_mt_init_slots(wacom_wac->touch_input,
 449                                                     wacom_wac->features.touch_max,
 450                                                     INPUT_MT_DIRECT);
 451                         else
 452                                 input_mt_init_slots(wacom_wac->touch_input,
 453                                                     wacom_wac->features.touch_max,
 454                                                     INPUT_MT_POINTER);
 455                 }
 456         }
 457 }
 458
 459 static void wacom_parse_hid(struct hid_device *hdev,
 460                            struct wacom_features *features)
 461 {
 462         struct hid_report_enum *rep_enum;
 463         struct hid_report *hreport;
 464         int i, j;
 465
 466         /* check features first */
 467         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 468         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 469                 for (i = 0; i < hreport->maxfield; i++) {
 470                         /* Ignore if report count is out of bounds. */
 471                         if (hreport->field[i]->report_count < 1)
 472                                 continue;
 473
 474                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 475                                 wacom_feature_mapping(hdev, hreport->field[i],
 476                                                 hreport->field[i]->usage + j);
 477                         }
 478                 }
 479         }
 480
 481         /* now check the input usages */
 482         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 483         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 484
 485                 if (!hreport->maxfield)
 486                         continue;
 487
 488                 for (i = 0; i < hreport->maxfield; i++)
 489                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 490                                 wacom_usage_mapping(hdev, hreport->field[i],
 491                                                 hreport->field[i]->usage + j);
 492         }
 493
 494         wacom_post_parse_hid(hdev, features);
 495 }
 496
 497 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 498 {
 499         struct wacom *wacom = hid_get_drvdata(hdev);
 500         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 501         struct hid_report *r;
 502         struct hid_report_enum *re;
 503
 504         if (hid_data->inputmode < 0)
 505                 return 0;
 506
 507         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 508         r = re->report_id_hash[hid_data->inputmode];
 509         if (r) {
 510                 r->field[0]->value[hid_data->inputmode_index] = 2;
 511                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 512         }
 513         return 0;
 514 }
 515
 516 static int wacom_set_device_mode(struct hid_device *hdev,
 517                                  struct wacom_wac *wacom_wac)
 518 {
 519         u8 *rep_data;
 520         struct hid_report *r;
 521         struct hid_report_enum *re;
 522         u32 length;
 523         int error = -ENOMEM, limit = 0;
 524
 525         if (wacom_wac->mode_report < 0)
 526                 return 0;
 527
 528         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 529         r = re->report_id_hash[wacom_wac->mode_report];
 530         if (!r)
 531                 return -EINVAL;
 532
 533         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
 534         if (!rep_data)
 535                 return -ENOMEM;
 536
 537         length = hid_report_len(r);
 538
 539         do {
 540                 rep_data[0] = wacom_wac->mode_report;
 541                 rep_data[1] = wacom_wac->mode_value;
 542
 543                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 544                                          length, 1);
 545                 if (error >= 0)
 546                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 547                                                  rep_data, length, 1);
 548         } while (error >= 0 &&
 549                  rep_data[1] != wacom_wac->mode_report &&
 550                  limit++ < WAC_MSG_RETRIES);
 551
 552         kfree(rep_data);
 553
 554         return error < 0 ? error : 0;
 555 }
 556
 557 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 558                 struct wacom_features *features)
 559 {
 560         struct wacom *wacom = hid_get_drvdata(hdev);
 561         int ret;
 562         u8 rep_data[2];
 563
 564         switch (features->type) {
 565         case GRAPHIRE_BT:
 566                 rep_data[0] = 0x03;
 567                 rep_data[1] = 0x00;
 568                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 569                                         3);
 570
 571                 if (ret >= 0) {
 572                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 573                         rep_data[1] = 0x00;
 574
 575                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 576                                                 rep_data, 2, 3);
 577
 578                         if (ret >= 0) {
 579                                 wacom->wacom_wac.bt_high_speed = speed;
 580                                 return 0;
 581                         }
 582                 }
 583
 584                 /*
 585                  * Note that if the raw queries fail, it's not a hard failure
 586                  * and it is safe to continue
 587                  */
 588                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 589                          rep_data[0], ret);
 590                 break;
 591         case INTUOS4WL:
 592                 if (speed == 1)
 593                         wacom->wacom_wac.bt_features &= ~0x20;
 594                 else
 595                         wacom->wacom_wac.bt_features |= 0x20;
 596
 597                 rep_data[0] = 0x03;
 598                 rep_data[1] = wacom->wacom_wac.bt_features;
 599
 600                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 601                                         1);
 602                 if (ret >= 0)
 603                         wacom->wacom_wac.bt_high_speed = speed;
 604                 break;
 605         }
 606
 607         return 0;
 608 }
 609
 610 /*
 611  * Switch the tablet into its most-capable mode. Wacom tablets are
 612  * typically configured to power-up in a mode which sends mouse-like
 613  * reports to the OS. To get absolute position, pressure data, etc.
 614  * from the tablet, it is necessary to switch the tablet out of this
 615  * mode and into one which sends the full range of tablet data.
 616  */
 617 static int _wacom_query_tablet_data(struct wacom *wacom)
 618 {
 619         struct hid_device *hdev = wacom->hdev;
 620         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 621         struct wacom_features *features = &wacom_wac->features;
 622
 623         if (hdev->bus == BUS_BLUETOOTH)
 624                 return wacom_bt_query_tablet_data(hdev, 1, features);
 625
 626         if (features->type != HID_GENERIC) {
 627                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 628                         if (features->type > TABLETPC) {
 629                                 /* MT Tablet PC touch */
 630                                 wacom_wac->mode_report = 3;
 631                                 wacom_wac->mode_value = 4;
 632                         } else if (features->type == WACOM_24HDT) {
 633                                 wacom_wac->mode_report = 18;
 634                                 wacom_wac->mode_value = 2;
 635                         } else if (features->type == WACOM_27QHDT) {
 636                                 wacom_wac->mode_report = 131;
 637                                 wacom_wac->mode_value = 2;
 638                         } else if (features->type == BAMBOO_PAD) {
 639                                 wacom_wac->mode_report = 2;
 640                                 wacom_wac->mode_value = 2;
 641                         }
 642                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 643                         if (features->type <= BAMBOO_PT) {
 644                                 wacom_wac->mode_report = 2;
 645                                 wacom_wac->mode_value = 2;
 646                         }
 647                 }
 648         }
 649
 650         wacom_set_device_mode(hdev, wacom_wac);
 651
 652         if (features->type == HID_GENERIC)
 653                 return wacom_hid_set_device_mode(hdev);
 654
 655         return 0;
 656 }
 657
 658 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 659                                          struct wacom_features *features)
 660 {
 661         struct wacom *wacom = hid_get_drvdata(hdev);
 662         struct usb_interface *intf = wacom->intf;
 663
 664         /* default features */
 665         features->x_fuzz = 4;
 666         features->y_fuzz = 4;
 667         features->pressure_fuzz = 0;
 668         features->distance_fuzz = 1;
 669         features->tilt_fuzz = 1;
 670
 671         /*
 672          * The wireless device HID is basic and layout conflicts with
 673          * other tablets (monitor and touch interface can look like pen).
 674          * Skip the query for this type and modify defaults based on
 675          * interface number.
 676          */
 677         if (features->type == WIRELESS) {
 678                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 679                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 680                 else
 681                         features->device_type = WACOM_DEVICETYPE_NONE;
 682                 return;
 683         }
 684
 685         wacom_parse_hid(hdev, features);
 686 }
 687
 688 struct wacom_hdev_data {
 689         struct list_head list;
 690         struct kref kref;
 691         struct hid_device *dev;
 692         struct wacom_shared shared;
 693 };
 694
 695 static LIST_HEAD(wacom_udev_list);
 696 static DEFINE_MUTEX(wacom_udev_list_lock);
 697
 698 static bool compare_device_paths(struct hid_device *hdev_a,
 699                 struct hid_device *hdev_b, char separator)
 700 {
 701         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
 702         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
 703
 704         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 705                 return false;
 706
 707         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
 708 }
 709
 710 static bool wacom_are_sibling(struct hid_device *hdev,
 711                 struct hid_device *sibling)
 712 {
 713         struct wacom *wacom = hid_get_drvdata(hdev);
 714         struct wacom_features *features = &wacom->wacom_wac.features;
 715         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
 716         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
 717         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
 718         __u32 oPid = features->oPid ? features->oPid : hdev->product;
 719
 720         /* The defined oVid/oPid must match that of the sibling */
 721         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
 722                 return false;
 723         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
 724                 return false;
 725
 726         /*
 727          * Devices with the same VID/PID must share the same physical
 728          * device path, while those with different VID/PID must share
 729          * the same physical parent device path.
 730          */
 731         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
 732                 if (!compare_device_paths(hdev, sibling, '/'))
 733                         return false;
 734         } else {
 735                 if (!compare_device_paths(hdev, sibling, '.'))
 736                         return false;
 737         }
 738
 739         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
 740         if (features->type != HID_GENERIC)
 741                 return true;
 742
 743         /*
 744          * Direct-input devices may not be siblings of indirect-input
 745          * devices.
 746          */
 747         if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 748             !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 749                 return false;
 750
 751         /*
 752          * Indirect-input devices may not be siblings of direct-input
 753          * devices.
 754          */
 755         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 756             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 757                 return false;
 758
 759         /* Pen devices may only be siblings of touch devices */
 760         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
 761             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
 762                 return false;
 763
 764         /* Touch devices may only be siblings of pen devices */
 765         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
 766             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
 767                 return false;
 768
 769         /*
 770          * No reason could be found for these two devices to NOT be
 771          * siblings, so there's a good chance they ARE siblings
 772          */
 773         return true;
 774 }
 775
 776 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 777 {
 778         struct wacom_hdev_data *data;
 779
 780         /* Try to find an already-probed interface from the same device */
 781         list_for_each_entry(data, &wacom_udev_list, list) {
 782                 if (compare_device_paths(hdev, data->dev, '/')) {
 783                         kref_get(&data->kref);
 784                         return data;
 785                 }
 786         }
 787
 788         /* Fallback to finding devices that appear to be "siblings" */
 789         list_for_each_entry(data, &wacom_udev_list, list) {
 790                 if (wacom_are_sibling(hdev, data->dev)) {
 791                         kref_get(&data->kref);
 792                         return data;
 793                 }
 794         }
 795
 796         return NULL;
 797 }
 798
 799 static void wacom_release_shared_data(struct kref *kref)
 800 {
 801         struct wacom_hdev_data *data =
 802                 container_of(kref, struct wacom_hdev_data, kref);
 803
 804         mutex_lock(&wacom_udev_list_lock);
 805         list_del(&data->list);
 806         mutex_unlock(&wacom_udev_list_lock);
 807
 808         kfree(data);
 809 }
 810
 811 static void wacom_remove_shared_data(void *res)
 812 {
 813         struct wacom *wacom = res;
 814         struct wacom_hdev_data *data;
 815         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 816
 817         if (wacom_wac->shared) {
 818                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 819                                     shared);
 820
 821                 if (wacom_wac->shared->touch == wacom->hdev)
 822                         wacom_wac->shared->touch = NULL;
 823                 else if (wacom_wac->shared->pen == wacom->hdev)
 824                         wacom_wac->shared->pen = NULL;
 825
 826                 kref_put(&data->kref, wacom_release_shared_data);
 827                 wacom_wac->shared = NULL;
 828         }
 829 }
 830
 831 static int wacom_add_shared_data(struct hid_device *hdev)
 832 {
 833         struct wacom *wacom = hid_get_drvdata(hdev);
 834         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 835         struct wacom_hdev_data *data;
 836         int retval = 0;
 837
 838         mutex_lock(&wacom_udev_list_lock);
 839
 840         data = wacom_get_hdev_data(hdev);
 841         if (!data) {
 842                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 843                 if (!data) {
 844                         retval = -ENOMEM;
 845                         goto out;
 846                 }
 847
 848                 kref_init(&data->kref);
 849                 data->dev = hdev;
 850                 list_add_tail(&data->list, &wacom_udev_list);
 851         }
 852
 853         wacom_wac->shared = &data->shared;
 854
 855         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
 856         if (retval) {
 857                 mutex_unlock(&wacom_udev_list_lock);
 858                 wacom_remove_shared_data(wacom);
 859                 return retval;
 860         }
 861
 862         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 863                 wacom_wac->shared->touch = hdev;
 864         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 865                 wacom_wac->shared->pen = hdev;
 866
 867 out:
 868         mutex_unlock(&wacom_udev_list_lock);
 869         return retval;
 870 }
 871
 872 static int wacom_led_control(struct wacom *wacom)
 873 {
 874         unsigned char *buf;
 875         int retval;
 876         unsigned char report_id = WAC_CMD_LED_CONTROL;
 877         int buf_size = 9;
 878
 879         if (!wacom->led.groups)
 880                 return -ENOTSUPP;
 881
 882         if (wacom->wacom_wac.features.type == REMOTE)
 883                 return -ENOTSUPP;
 884
 885         if (wacom->wacom_wac.pid) { /* wireless connected */
 886                 report_id = WAC_CMD_WL_LED_CONTROL;
 887                 buf_size = 13;
 888         }
 889         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 890                 report_id = WAC_CMD_WL_INTUOSP2;
 891                 buf_size = 51;
 892         }
 893         buf = kzalloc(buf_size, GFP_KERNEL);
 894         if (!buf)
 895                 return -ENOMEM;
 896
 897         if (wacom->wacom_wac.features.type == HID_GENERIC) {
 898                 buf[0] = WAC_CMD_LED_CONTROL_GENERIC;
 899                 buf[1] = wacom->led.llv;
 900                 buf[2] = wacom->led.groups[0].select & 0x03;
 901
 902         } else if ((wacom->wacom_wac.features.type >= INTUOS5S &&
 903             wacom->wacom_wac.features.type <= INTUOSPL)) {
 904                 /*
 905                  * Touch Ring and crop mark LED luminance may take on
 906                  * one of four values:
 907                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 908                  */
 909                 int ring_led = wacom->led.groups[0].select & 0x03;
 910                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 911                 int crop_lum = 0;
 912                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 913
 914                 buf[0] = report_id;
 915                 if (wacom->wacom_wac.pid) {
 916                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 917                                          buf, buf_size, WAC_CMD_RETRIES);
 918                         buf[0] = report_id;
 919                         buf[4] = led_bits;
 920                 } else
 921                         buf[1] = led_bits;
 922         }
 923         else if (wacom->wacom_wac.features.type == INTUOSP2_BT) {
 924                 buf[0] = report_id;
 925                 buf[4] = 100; // Power Connection LED (ORANGE)
 926                 buf[5] = 100; // BT Connection LED (BLUE)
 927                 buf[6] = 100; // Paper Mode (RED?)
 928                 buf[7] = 100; // Paper Mode (GREEN?)
 929                 buf[8] = 100; // Paper Mode (BLUE?)
 930                 buf[9] = wacom->led.llv;
 931                 buf[10] = wacom->led.groups[0].select & 0x03;
 932         }
 933         else {
 934                 int led = wacom->led.groups[0].select | 0x4;
 935
 936                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 937                     wacom->wacom_wac.features.type == WACOM_24HD)
 938                         led |= (wacom->led.groups[1].select << 4) | 0x40;
 939
 940                 buf[0] = report_id;
 941                 buf[1] = led;
 942                 buf[2] = wacom->led.llv;
 943                 buf[3] = wacom->led.hlv;
 944                 buf[4] = wacom->led.img_lum;
 945         }
 946
 947         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 948                                   WAC_CMD_RETRIES);
 949         kfree(buf);
 950
 951         return retval;
 952 }
 953
 954 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 955                 const unsigned len, const void *img)
 956 {
 957         unsigned char *buf;
 958         int i, retval;
 959         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 960
 961         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 962         if (!buf)
 963                 return -ENOMEM;
 964
 965         /* Send 'start' command */
 966         buf[0] = WAC_CMD_ICON_START;
 967         buf[1] = 1;
 968         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 969                                   WAC_CMD_RETRIES);
 970         if (retval < 0)
 971                 goto out;
 972
 973         buf[0] = xfer_id;
 974         buf[1] = button_id & 0x07;
 975         for (i = 0; i < 4; i++) {
 976                 buf[2] = i;
 977                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 978
 979                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 980                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 981                 if (retval < 0)
 982                         break;
 983         }
 984
 985         /* Send 'stop' */
 986         buf[0] = WAC_CMD_ICON_START;
 987         buf[1] = 0;
 988         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 989                          WAC_CMD_RETRIES);
 990
 991 out:
 992         kfree(buf);
 993         return retval;
 994 }
 995
 996 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 997                                       const char *buf, size_t count)
 998 {
 999         struct hid_device *hdev = to_hid_device(dev);
1000         struct wacom *wacom = hid_get_drvdata(hdev);
1001         unsigned int id;
1002         int err;
1003
1004         err = kstrtouint(buf, 10, &id);
1005         if (err)
1006                 return err;
1007
1008         mutex_lock(&wacom->lock);
1009
1010         wacom->led.groups[set_id].select = id & 0x3;
1011         err = wacom_led_control(wacom);
1012
1013         mutex_unlock(&wacom->lock);
1014
1015         return err < 0 ? err : count;
1016 }
1017
1018 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
1019 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
1020         struct device_attribute *attr, const char *buf, size_t count)   \
1021 {                                                                       \
1022         return wacom_led_select_store(dev, SET_ID, buf, count);         \
1023 }                                                                       \
1024 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
1025         struct device_attribute *attr, char *buf)                       \
1026 {                                                                       \
1027         struct hid_device *hdev = to_hid_device(dev);\
1028         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1029         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
1030                          wacom->led.groups[SET_ID].select);             \
1031 }                                                                       \
1032 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
1033                     wacom_led##SET_ID##_select_show,                    \
1034                     wacom_led##SET_ID##_select_store)
1035
1036 DEVICE_LED_SELECT_ATTR(0);
1037 DEVICE_LED_SELECT_ATTR(1);
1038
1039 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
1040                                      const char *buf, size_t count)
1041 {
1042         unsigned int value;
1043         int err;
1044
1045         err = kstrtouint(buf, 10, &value);
1046         if (err)
1047                 return err;
1048
1049         mutex_lock(&wacom->lock);
1050
1051         *dest = value & 0x7f;
1052         err = wacom_led_control(wacom);
1053
1054         mutex_unlock(&wacom->lock);
1055
1056         return err < 0 ? err : count;
1057 }
1058
1059 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
1060 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
1061         struct device_attribute *attr, const char *buf, size_t count)   \
1062 {                                                                       \
1063         struct hid_device *hdev = to_hid_device(dev);\
1064         struct wacom *wacom = hid_get_drvdata(hdev);                    \
1065                                                                         \
1066         return wacom_luminance_store(wacom, &wacom->led.field,          \
1067                                      buf, count);                       \
1068 }                                                                       \
1069 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
1070         struct device_attribute *attr, char *buf)                       \
1071 {                                                                       \
1072         struct wacom *wacom = dev_get_drvdata(dev);                     \
1073         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
1074 }                                                                       \
1075 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
1076                    wacom_##name##_luminance_show,                       \
1077                    wacom_##name##_luminance_store)
1078
1079 DEVICE_LUMINANCE_ATTR(status0, llv);
1080 DEVICE_LUMINANCE_ATTR(status1, hlv);
1081 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
1082
1083 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
1084                                         const char *buf, size_t count)
1085 {
1086         struct hid_device *hdev = to_hid_device(dev);
1087         struct wacom *wacom = hid_get_drvdata(hdev);
1088         int err;
1089         unsigned len;
1090         u8 xfer_id;
1091
1092         if (hdev->bus == BUS_BLUETOOTH) {
1093                 len = 256;
1094                 xfer_id = WAC_CMD_ICON_BT_XFER;
1095         } else {
1096                 len = 1024;
1097                 xfer_id = WAC_CMD_ICON_XFER;
1098         }
1099
1100         if (count != len)
1101                 return -EINVAL;
1102
1103         mutex_lock(&wacom->lock);
1104
1105         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
1106
1107         mutex_unlock(&wacom->lock);
1108
1109         return err < 0 ? err : count;
1110 }
1111
1112 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
1113 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
1114         struct device_attribute *attr, const char *buf, size_t count)   \
1115 {                                                                       \
1116         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
1117 }                                                                       \
1118 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
1119                    NULL, wacom_btnimg##BUTTON_ID##_store)
1120
1121 DEVICE_BTNIMG_ATTR(0);
1122 DEVICE_BTNIMG_ATTR(1);
1123 DEVICE_BTNIMG_ATTR(2);
1124 DEVICE_BTNIMG_ATTR(3);
1125 DEVICE_BTNIMG_ATTR(4);
1126 DEVICE_BTNIMG_ATTR(5);
1127 DEVICE_BTNIMG_ATTR(6);
1128 DEVICE_BTNIMG_ATTR(7);
1129
1130 static struct attribute *cintiq_led_attrs[] = {
1131         &dev_attr_status_led0_select.attr,
1132         &dev_attr_status_led1_select.attr,
1133         NULL
1134 };
1135
1136 static struct attribute_group cintiq_led_attr_group = {
1137         .name = "wacom_led",
1138         .attrs = cintiq_led_attrs,
1139 };
1140
1141 static struct attribute *intuos4_led_attrs[] = {
1142         &dev_attr_status0_luminance.attr,
1143         &dev_attr_status1_luminance.attr,
1144         &dev_attr_status_led0_select.attr,
1145         &dev_attr_buttons_luminance.attr,
1146         &dev_attr_button0_rawimg.attr,
1147         &dev_attr_button1_rawimg.attr,
1148         &dev_attr_button2_rawimg.attr,
1149         &dev_attr_button3_rawimg.attr,
1150         &dev_attr_button4_rawimg.attr,
1151         &dev_attr_button5_rawimg.attr,
1152         &dev_attr_button6_rawimg.attr,
1153         &dev_attr_button7_rawimg.attr,
1154         NULL
1155 };
1156
1157 static struct attribute_group intuos4_led_attr_group = {
1158         .name = "wacom_led",
1159         .attrs = intuos4_led_attrs,
1160 };
1161
1162 static struct attribute *intuos5_led_attrs[] = {
1163         &dev_attr_status0_luminance.attr,
1164         &dev_attr_status_led0_select.attr,
1165         NULL
1166 };
1167
1168 static struct attribute_group intuos5_led_attr_group = {
1169         .name = "wacom_led",
1170         .attrs = intuos5_led_attrs,
1171 };
1172
1173 static struct attribute *generic_led_attrs[] = {
1174         &dev_attr_status0_luminance.attr,
1175         &dev_attr_status_led0_select.attr,
1176         NULL
1177 };
1178
1179 static struct attribute_group generic_led_attr_group = {
1180         .name = "wacom_led",
1181         .attrs = generic_led_attrs,
1182 };
1183
1184 struct wacom_sysfs_group_devres {
1185         struct attribute_group *group;
1186         struct kobject *root;
1187 };
1188
1189 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
1190 {
1191         struct wacom_sysfs_group_devres *devres = res;
1192         struct kobject *kobj = devres->root;
1193
1194         dev_dbg(dev, "%s: dropping reference to %s\n",
1195                 __func__, devres->group->name);
1196         sysfs_remove_group(kobj, devres->group);
1197 }
1198
1199 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1200                                            struct kobject *root,
1201                                            struct attribute_group *group)
1202 {
1203         struct wacom_sysfs_group_devres *devres;
1204         int error;
1205
1206         devres = devres_alloc(wacom_devm_sysfs_group_release,
1207                               sizeof(struct wacom_sysfs_group_devres),
1208                               GFP_KERNEL);
1209         if (!devres)
1210                 return -ENOMEM;
1211
1212         devres->group = group;
1213         devres->root = root;
1214
1215         error = sysfs_create_group(devres->root, group);
1216         if (error) {
1217                 devres_free(devres);
1218                 return error;
1219         }
1220
1221         devres_add(&wacom->hdev->dev, devres);
1222
1223         return 0;
1224 }
1225
1226 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1227                                          struct attribute_group *group)
1228 {
1229         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1230                                                group);
1231 }
1232
1233 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1234 {
1235         struct wacom *wacom = led->wacom;
1236
1237         if (wacom->led.max_hlv)
1238                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1239
1240         if (wacom->led.max_llv)
1241                 return led->llv * LED_FULL / wacom->led.max_llv;
1242
1243         /* device doesn't support brightness tuning */
1244         return LED_FULL;
1245 }
1246
1247 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1248 {
1249         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1250         struct wacom *wacom = led->wacom;
1251
1252         if (wacom->led.groups[led->group].select != led->id)
1253                 return LED_OFF;
1254
1255         return wacom_leds_brightness_get(led);
1256 }
1257
1258 static int wacom_led_brightness_set(struct led_classdev *cdev,
1259                                     enum led_brightness brightness)
1260 {
1261         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1262         struct wacom *wacom = led->wacom;
1263         int error;
1264
1265         mutex_lock(&wacom->lock);
1266
1267         if (!wacom->led.groups || (brightness == LED_OFF &&
1268             wacom->led.groups[led->group].select != led->id)) {
1269                 error = 0;
1270                 goto out;
1271         }
1272
1273         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1274         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1275
1276         wacom->led.groups[led->group].select = led->id;
1277
1278         error = wacom_led_control(wacom);
1279
1280 out:
1281         mutex_unlock(&wacom->lock);
1282
1283         return error;
1284 }
1285
1286 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1287                                                enum led_brightness brightness)
1288 {
1289 }
1290
1291 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1292                                   struct wacom_led *led, unsigned int group,
1293                                   unsigned int id, bool read_only)
1294 {
1295         int error;
1296         char *name;
1297
1298         name = devm_kasprintf(dev, GFP_KERNEL,
1299                               "%s::wacom-%d.%d",
1300                               dev_name(dev),
1301                               group,
1302                               id);
1303         if (!name)
1304                 return -ENOMEM;
1305
1306         if (!read_only) {
1307                 led->trigger.name = name;
1308                 error = devm_led_trigger_register(dev, &led->trigger);
1309                 if (error) {
1310                         hid_err(wacom->hdev,
1311                                 "failed to register LED trigger %s: %d\n",
1312                                 led->cdev.name, error);
1313                         return error;
1314                 }
1315         }
1316
1317         led->group = group;
1318         led->id = id;
1319         led->wacom = wacom;
1320         led->llv = wacom->led.llv;
1321         led->hlv = wacom->led.hlv;
1322         led->cdev.name = name;
1323         led->cdev.max_brightness = LED_FULL;
1324         led->cdev.flags = LED_HW_PLUGGABLE;
1325         led->cdev.brightness_get = __wacom_led_brightness_get;
1326         if (!read_only) {
1327                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1328                 led->cdev.default_trigger = led->cdev.name;
1329         } else {
1330                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1331         }
1332
1333         error = devm_led_classdev_register(dev, &led->cdev);
1334         if (error) {
1335                 hid_err(wacom->hdev,
1336                         "failed to register LED %s: %d\n",
1337                         led->cdev.name, error);
1338                 led->cdev.name = NULL;
1339                 return error;
1340         }
1341
1342         return 0;
1343 }
1344
1345 static void wacom_led_groups_release_one(void *data)
1346 {
1347         struct wacom_group_leds *group = data;
1348
1349         devres_release_group(group->dev, group);
1350 }
1351
1352 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1353                                                    struct wacom *wacom,
1354                                                    int group_id, int count,
1355                                                    bool read_only)
1356 {
1357         struct wacom_led *leds;
1358         int i, error;
1359
1360         if (group_id >= wacom->led.count || count <= 0)
1361                 return -EINVAL;
1362
1363         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1364                 return -ENOMEM;
1365
1366         leds = devm_kcalloc(dev, count, sizeof(struct wacom_led), GFP_KERNEL);
1367         if (!leds) {
1368                 error = -ENOMEM;
1369                 goto err;
1370         }
1371
1372         wacom->led.groups[group_id].leds = leds;
1373         wacom->led.groups[group_id].count = count;
1374
1375         for (i = 0; i < count; i++) {
1376                 error = wacom_led_register_one(dev, wacom, &leds[i],
1377                                                group_id, i, read_only);
1378                 if (error)
1379                         goto err;
1380         }
1381
1382         wacom->led.groups[group_id].dev = dev;
1383
1384         devres_close_group(dev, &wacom->led.groups[group_id]);
1385
1386         /*
1387          * There is a bug (?) in devm_led_classdev_register() in which its
1388          * increments the refcount of the parent. If the parent is an input
1389          * device, that means the ref count never reaches 0 when
1390          * devm_input_device_release() gets called.
1391          * This means that the LEDs are still there after disconnect.
1392          * Manually force the release of the group so that the leds are released
1393          * once we are done using them.
1394          */
1395         error = devm_add_action_or_reset(&wacom->hdev->dev,
1396                                          wacom_led_groups_release_one,
1397                                          &wacom->led.groups[group_id]);
1398         if (error)
1399                 return error;
1400
1401         return 0;
1402
1403 err:
1404         devres_release_group(dev, &wacom->led.groups[group_id]);
1405         return error;
1406 }
1407
1408 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1409                                  unsigned int id)
1410 {
1411         struct wacom_group_leds *group;
1412
1413         if (group_id >= wacom->led.count)
1414                 return NULL;
1415
1416         group = &wacom->led.groups[group_id];
1417
1418         if (!group->leds)
1419                 return NULL;
1420
1421         id %= group->count;
1422
1423         return &group->leds[id];
1424 }
1425
1426 /**
1427  * wacom_led_next: gives the next available led with a wacom trigger.
1428  *
1429  * returns the next available struct wacom_led which has its default trigger
1430  * or the current one if none is available.
1431  */
1432 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1433 {
1434         struct wacom_led *next_led;
1435         int group, next;
1436
1437         if (!wacom || !cur)
1438                 return NULL;
1439
1440         group = cur->group;
1441         next = cur->id;
1442
1443         do {
1444                 next_led = wacom_led_find(wacom, group, ++next);
1445                 if (!next_led || next_led == cur)
1446                         return next_led;
1447         } while (next_led->cdev.trigger != &next_led->trigger);
1448
1449         return next_led;
1450 }
1451
1452 static void wacom_led_groups_release(void *data)
1453 {
1454         struct wacom *wacom = data;
1455
1456         wacom->led.groups = NULL;
1457         wacom->led.count = 0;
1458 }
1459
1460 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1461 {
1462         struct device *dev = &wacom->hdev->dev;
1463         struct wacom_group_leds *groups;
1464         int error;
1465
1466         groups = devm_kcalloc(dev, count, sizeof(struct wacom_group_leds),
1467                               GFP_KERNEL);
1468         if (!groups)
1469                 return -ENOMEM;
1470
1471         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1472         if (error)
1473                 return error;
1474
1475         wacom->led.groups = groups;
1476         wacom->led.count = count;
1477
1478         return 0;
1479 }
1480
1481 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1482                                          int led_per_group, bool read_only)
1483 {
1484         struct device *dev;
1485         int i, error;
1486
1487         if (!wacom->wacom_wac.pad_input)
1488                 return -EINVAL;
1489
1490         dev = &wacom->wacom_wac.pad_input->dev;
1491
1492         error = wacom_led_groups_allocate(wacom, group_count);
1493         if (error)
1494                 return error;
1495
1496         for (i = 0; i < group_count; i++) {
1497                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1498                                                                 led_per_group,
1499                                                                 read_only);
1500                 if (error)
1501                         return error;
1502         }
1503
1504         return 0;
1505 }
1506
1507 int wacom_initialize_leds(struct wacom *wacom)
1508 {
1509         int error;
1510
1511         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1512                 return 0;
1513
1514         /* Initialize default values */
1515         switch (wacom->wacom_wac.features.type) {
1516         case HID_GENERIC:
1517                 if (!wacom->generic_has_leds)
1518                         return 0;
1519                 wacom->led.llv = 100;
1520                 wacom->led.max_llv = 100;
1521
1522                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1523                 if (error) {
1524                         hid_err(wacom->hdev,
1525                                 "cannot create leds err: %d\n", error);
1526                         return error;
1527                 }
1528
1529                 error = wacom_devm_sysfs_create_group(wacom,
1530                                                       &generic_led_attr_group);
1531                 break;
1532
1533         case INTUOS4S:
1534         case INTUOS4:
1535         case INTUOS4WL:
1536         case INTUOS4L:
1537                 wacom->led.llv = 10;
1538                 wacom->led.hlv = 20;
1539                 wacom->led.max_llv = 127;
1540                 wacom->led.max_hlv = 127;
1541                 wacom->led.img_lum = 10;
1542
1543                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1544                 if (error) {
1545                         hid_err(wacom->hdev,
1546                                 "cannot create leds err: %d\n", error);
1547                         return error;
1548                 }
1549
1550                 error = wacom_devm_sysfs_create_group(wacom,
1551                                                       &intuos4_led_attr_group);
1552                 break;
1553
1554         case WACOM_24HD:
1555         case WACOM_21UX2:
1556                 wacom->led.llv = 0;
1557                 wacom->led.hlv = 0;
1558                 wacom->led.img_lum = 0;
1559
1560                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1561                 if (error) {
1562                         hid_err(wacom->hdev,
1563                                 "cannot create leds err: %d\n", error);
1564                         return error;
1565                 }
1566
1567                 error = wacom_devm_sysfs_create_group(wacom,
1568                                                       &cintiq_led_attr_group);
1569                 break;
1570
1571         case INTUOS5S:
1572         case INTUOS5:
1573         case INTUOS5L:
1574         case INTUOSPS:
1575         case INTUOSPM:
1576         case INTUOSPL:
1577                 wacom->led.llv = 32;
1578                 wacom->led.max_llv = 96;
1579
1580                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1581                 if (error) {
1582                         hid_err(wacom->hdev,
1583                                 "cannot create leds err: %d\n", error);
1584                         return error;
1585                 }
1586
1587                 error = wacom_devm_sysfs_create_group(wacom,
1588                                                       &intuos5_led_attr_group);
1589                 break;
1590
1591         case INTUOSP2_BT:
1592                 wacom->led.llv = 50;
1593                 wacom->led.max_llv = 100;
1594                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1595                 if (error) {
1596                         hid_err(wacom->hdev,
1597                                 "cannot create leds err: %d\n", error);
1598                         return error;
1599                 }
1600                 return 0;
1601
1602         case REMOTE:
1603                 wacom->led.llv = 255;
1604                 wacom->led.max_llv = 255;
1605                 error = wacom_led_groups_allocate(wacom, 5);
1606                 if (error) {
1607                         hid_err(wacom->hdev,
1608                                 "cannot create leds err: %d\n", error);
1609                         return error;
1610                 }
1611                 return 0;
1612
1613         default:
1614                 return 0;
1615         }
1616
1617         if (error) {
1618                 hid_err(wacom->hdev,
1619                         "cannot create sysfs group err: %d\n", error);
1620                 return error;
1621         }
1622
1623         return 0;
1624 }
1625
1626 static void wacom_init_work(struct work_struct *work)
1627 {
1628         struct wacom *wacom = container_of(work, struct wacom, init_work.work);
1629
1630         _wacom_query_tablet_data(wacom);
1631         wacom_led_control(wacom);
1632 }
1633
1634 static void wacom_query_tablet_data(struct wacom *wacom)
1635 {
1636         schedule_delayed_work(&wacom->init_work, msecs_to_jiffies(1000));
1637 }
1638
1639 static enum power_supply_property wacom_battery_props[] = {
1640         POWER_SUPPLY_PROP_MODEL_NAME,
1641         POWER_SUPPLY_PROP_PRESENT,
1642         POWER_SUPPLY_PROP_STATUS,
1643         POWER_SUPPLY_PROP_SCOPE,
1644         POWER_SUPPLY_PROP_CAPACITY
1645 };
1646
1647 static int wacom_battery_get_property(struct power_supply *psy,
1648                                       enum power_supply_property psp,
1649                                       union power_supply_propval *val)
1650 {
1651         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1652         int ret = 0;
1653
1654         switch (psp) {
1655                 case POWER_SUPPLY_PROP_MODEL_NAME:
1656                         val->strval = battery->wacom->wacom_wac.name;
1657                         break;
1658                 case POWER_SUPPLY_PROP_PRESENT:
1659                         val->intval = battery->bat_connected;
1660                         break;
1661                 case POWER_SUPPLY_PROP_SCOPE:
1662                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1663                         break;
1664                 case POWER_SUPPLY_PROP_CAPACITY:
1665                         val->intval = battery->battery_capacity;
1666                         break;
1667                 case POWER_SUPPLY_PROP_STATUS:
1668                         if (battery->bat_status != WACOM_POWER_SUPPLY_STATUS_AUTO)
1669                                 val->intval = battery->bat_status;
1670                         else if (battery->bat_charging)
1671                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1672                         else if (battery->battery_capacity == 100 &&
1673                                     battery->ps_connected)
1674                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1675                         else if (battery->ps_connected)
1676                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1677                         else
1678                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1679                         break;
1680                 default:
1681                         ret = -EINVAL;
1682                         break;
1683         }
1684
1685         return ret;
1686 }
1687
1688 static int __wacom_initialize_battery(struct wacom *wacom,
1689                                       struct wacom_battery *battery)
1690 {
1691         static atomic_t battery_no = ATOMIC_INIT(0);
1692         struct device *dev = &wacom->hdev->dev;
1693         struct power_supply_config psy_cfg = { .drv_data = battery, };
1694         struct power_supply *ps_bat;
1695         struct power_supply_desc *bat_desc = &battery->bat_desc;
1696         unsigned long n;
1697         int error;
1698
1699         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1700                 return -ENOMEM;
1701
1702         battery->wacom = wacom;
1703
1704         n = atomic_inc_return(&battery_no) - 1;
1705
1706         bat_desc->properties = wacom_battery_props;
1707         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1708         bat_desc->get_property = wacom_battery_get_property;
1709         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1710         bat_desc->name = battery->bat_name;
1711         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1712         bat_desc->use_for_apm = 0;
1713
1714         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1715         if (IS_ERR(ps_bat)) {
1716                 error = PTR_ERR(ps_bat);
1717                 goto err;
1718         }
1719
1720         power_supply_powers(ps_bat, &wacom->hdev->dev);
1721
1722         battery->battery = ps_bat;
1723
1724         devres_close_group(dev, bat_desc);
1725         return 0;
1726
1727 err:
1728         devres_release_group(dev, bat_desc);
1729         return error;
1730 }
1731
1732 static int wacom_initialize_battery(struct wacom *wacom)
1733 {
1734         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1735                 return __wacom_initialize_battery(wacom, &wacom->battery);
1736
1737         return 0;
1738 }
1739
1740 static void wacom_destroy_battery(struct wacom *wacom)
1741 {
1742         if (wacom->battery.battery) {
1743                 devres_release_group(&wacom->hdev->dev,
1744                                      &wacom->battery.bat_desc);
1745                 wacom->battery.battery = NULL;
1746         }
1747 }
1748
1749 static ssize_t wacom_show_speed(struct device *dev,
1750                                 struct device_attribute
1751                                 *attr, char *buf)
1752 {
1753         struct hid_device *hdev = to_hid_device(dev);
1754         struct wacom *wacom = hid_get_drvdata(hdev);
1755
1756         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1757 }
1758
1759 static ssize_t wacom_store_speed(struct device *dev,
1760                                 struct device_attribute *attr,
1761                                 const char *buf, size_t count)
1762 {
1763         struct hid_device *hdev = to_hid_device(dev);
1764         struct wacom *wacom = hid_get_drvdata(hdev);
1765         u8 new_speed;
1766
1767         if (kstrtou8(buf, 0, &new_speed))
1768                 return -EINVAL;
1769
1770         if (new_speed != 0 && new_speed != 1)
1771                 return -EINVAL;
1772
1773         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1774
1775         return count;
1776 }
1777
1778 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1779                 wacom_show_speed, wacom_store_speed);
1780
1781
1782 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1783                                       struct kobj_attribute *kattr,
1784                                       char *buf, int index)
1785 {
1786         struct device *dev = kobj_to_dev(kobj->parent);
1787         struct hid_device *hdev = to_hid_device(dev);
1788         struct wacom *wacom = hid_get_drvdata(hdev);
1789         u8 mode;
1790
1791         mode = wacom->led.groups[index].select;
1792         return sprintf(buf, "%d\n", mode < 3 ? mode : -1);
1793 }
1794
1795 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1796 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1797                                struct kobj_attribute *kattr, char *buf) \
1798 {                                                                       \
1799         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1800 }                                                                       \
1801 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1802         .attr = {.name = "remote_mode",                                 \
1803                 .mode = DEV_ATTR_RO_PERM},                              \
1804         .show = wacom_show_remote##SET_ID##_mode,                       \
1805 };                                                                      \
1806 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1807         &remote##SET_ID##_mode_attr.attr,                               \
1808         NULL                                                            \
1809 };                                                                      \
1810 static struct attribute_group remote##SET_ID##_serial_group = {         \
1811         .name = NULL,                                                   \
1812         .attrs = remote##SET_ID##_serial_attrs,                         \
1813 }
1814
1815 DEVICE_EKR_ATTR_GROUP(0);
1816 DEVICE_EKR_ATTR_GROUP(1);
1817 DEVICE_EKR_ATTR_GROUP(2);
1818 DEVICE_EKR_ATTR_GROUP(3);
1819 DEVICE_EKR_ATTR_GROUP(4);
1820
1821 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1822                                           int index)
1823 {
1824         int error = 0;
1825         struct wacom_remote *remote = wacom->remote;
1826
1827         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1828                                                           GFP_KERNEL,
1829                                                           "%d", serial);
1830         if (!remote->remotes[index].group.name)
1831                 return -ENOMEM;
1832
1833         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1834                                                 &remote->remotes[index].group);
1835         if (error) {
1836                 remote->remotes[index].group.name = NULL;
1837                 hid_err(wacom->hdev,
1838                         "cannot create sysfs group err: %d\n", error);
1839                 return error;
1840         }
1841
1842         return 0;
1843 }
1844
1845 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1846 {
1847         const size_t buf_size = 2;
1848         unsigned char *buf;
1849         int retval;
1850
1851         buf = kzalloc(buf_size, GFP_KERNEL);
1852         if (!buf)
1853                 return -ENOMEM;
1854
1855         buf[0] = WAC_CMD_DELETE_PAIRING;
1856         buf[1] = selector;
1857
1858         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1859                                   buf_size, WAC_CMD_RETRIES);
1860         kfree(buf);
1861
1862         return retval;
1863 }
1864
1865 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1866                                          struct kobj_attribute *attr,
1867                                          const char *buf, size_t count)
1868 {
1869         unsigned char selector = 0;
1870         struct device *dev = kobj_to_dev(kobj->parent);
1871         struct hid_device *hdev = to_hid_device(dev);
1872         struct wacom *wacom = hid_get_drvdata(hdev);
1873         int err;
1874
1875         if (!strncmp(buf, "*\n", 2)) {
1876                 selector = WAC_CMD_UNPAIR_ALL;
1877         } else {
1878                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1879                          buf);
1880                 return -1;
1881         }
1882
1883         mutex_lock(&wacom->lock);
1884
1885         err = wacom_cmd_unpair_remote(wacom, selector);
1886         mutex_unlock(&wacom->lock);
1887
1888         return err < 0 ? err : count;
1889 }
1890
1891 static struct kobj_attribute unpair_remote_attr = {
1892         .attr = {.name = "unpair_remote", .mode = 0200},
1893         .store = wacom_store_unpair_remote,
1894 };
1895
1896 static const struct attribute *remote_unpair_attrs[] = {
1897         &unpair_remote_attr.attr,
1898         NULL
1899 };
1900
1901 static void wacom_remotes_destroy(void *data)
1902 {
1903         struct wacom *wacom = data;
1904         struct wacom_remote *remote = wacom->remote;
1905
1906         if (!remote)
1907                 return;
1908
1909         kobject_put(remote->remote_dir);
1910         kfifo_free(&remote->remote_fifo);
1911         wacom->remote = NULL;
1912 }
1913
1914 static int wacom_initialize_remotes(struct wacom *wacom)
1915 {
1916         int error = 0;
1917         struct wacom_remote *remote;
1918         int i;
1919
1920         if (wacom->wacom_wac.features.type != REMOTE)
1921                 return 0;
1922
1923         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1924                               GFP_KERNEL);
1925         if (!remote)
1926                 return -ENOMEM;
1927
1928         wacom->remote = remote;
1929
1930         spin_lock_init(&remote->remote_lock);
1931
1932         error = kfifo_alloc(&remote->remote_fifo,
1933                         5 * sizeof(struct wacom_remote_data),
1934                         GFP_KERNEL);
1935         if (error) {
1936                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1937                 return -ENOMEM;
1938         }
1939
1940         remote->remotes[0].group = remote0_serial_group;
1941         remote->remotes[1].group = remote1_serial_group;
1942         remote->remotes[2].group = remote2_serial_group;
1943         remote->remotes[3].group = remote3_serial_group;
1944         remote->remotes[4].group = remote4_serial_group;
1945
1946         remote->remote_dir = kobject_create_and_add("wacom_remote",
1947                                                     &wacom->hdev->dev.kobj);
1948         if (!remote->remote_dir)
1949                 return -ENOMEM;
1950
1951         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1952
1953         if (error) {
1954                 hid_err(wacom->hdev,
1955                         "cannot create sysfs group err: %d\n", error);
1956                 return error;
1957         }
1958
1959         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1960                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1961                 remote->remotes[i].serial = 0;
1962         }
1963
1964         error = devm_add_action_or_reset(&wacom->hdev->dev,
1965                                          wacom_remotes_destroy, wacom);
1966         if (error)
1967                 return error;
1968
1969         return 0;
1970 }
1971
1972 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1973 {
1974         struct input_dev *input_dev;
1975         struct hid_device *hdev = wacom->hdev;
1976         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1977
1978         input_dev = devm_input_allocate_device(&hdev->dev);
1979         if (!input_dev)
1980                 return NULL;
1981
1982         input_dev->name = wacom_wac->features.name;
1983         input_dev->phys = hdev->phys;
1984         input_dev->dev.parent = &hdev->dev;
1985         input_dev->open = wacom_open;
1986         input_dev->close = wacom_close;
1987         input_dev->uniq = hdev->uniq;
1988         input_dev->id.bustype = hdev->bus;
1989         input_dev->id.vendor  = hdev->vendor;
1990         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1991         input_dev->id.version = hdev->version;
1992         input_set_drvdata(input_dev, wacom);
1993
1994         return input_dev;
1995 }
1996
1997 static int wacom_allocate_inputs(struct wacom *wacom)
1998 {
1999         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2000
2001         wacom_wac->pen_input = wacom_allocate_input(wacom);
2002         wacom_wac->touch_input = wacom_allocate_input(wacom);
2003         wacom_wac->pad_input = wacom_allocate_input(wacom);
2004         if (!wacom_wac->pen_input ||
2005             !wacom_wac->touch_input ||
2006             !wacom_wac->pad_input)
2007                 return -ENOMEM;
2008
2009         wacom_wac->pen_input->name = wacom_wac->pen_name;
2010         wacom_wac->touch_input->name = wacom_wac->touch_name;
2011         wacom_wac->pad_input->name = wacom_wac->pad_name;
2012
2013         return 0;
2014 }
2015
2016 static int wacom_register_inputs(struct wacom *wacom)
2017 {
2018         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
2019         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
2020         int error = 0;
2021
2022         pen_input_dev = wacom_wac->pen_input;
2023         touch_input_dev = wacom_wac->touch_input;
2024         pad_input_dev = wacom_wac->pad_input;
2025
2026         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
2027                 return -EINVAL;
2028
2029         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
2030         if (error) {
2031                 /* no pen in use on this interface */
2032                 input_free_device(pen_input_dev);
2033                 wacom_wac->pen_input = NULL;
2034                 pen_input_dev = NULL;
2035         } else {
2036                 error = input_register_device(pen_input_dev);
2037                 if (error)
2038                         goto fail;
2039         }
2040
2041         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
2042         if (error) {
2043                 /* no touch in use on this interface */
2044                 input_free_device(touch_input_dev);
2045                 wacom_wac->touch_input = NULL;
2046                 touch_input_dev = NULL;
2047         } else {
2048                 error = input_register_device(touch_input_dev);
2049                 if (error)
2050                         goto fail;
2051         }
2052
2053         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
2054         if (error) {
2055                 /* no pad in use on this interface */
2056                 input_free_device(pad_input_dev);
2057                 wacom_wac->pad_input = NULL;
2058                 pad_input_dev = NULL;
2059         } else {
2060                 error = input_register_device(pad_input_dev);
2061                 if (error)
2062                         goto fail;
2063         }
2064
2065         return 0;
2066
2067 fail:
2068         wacom_wac->pad_input = NULL;
2069         wacom_wac->touch_input = NULL;
2070         wacom_wac->pen_input = NULL;
2071         return error;
2072 }
2073
2074 /*
2075  * Not all devices report physical dimensions from HID.
2076  * Compute the default from hardcoded logical dimension
2077  * and resolution before driver overwrites them.
2078  */
2079 static void wacom_set_default_phy(struct wacom_features *features)
2080 {
2081         if (features->x_resolution) {
2082                 features->x_phy = (features->x_max * 100) /
2083                                         features->x_resolution;
2084                 features->y_phy = (features->y_max * 100) /
2085                                         features->y_resolution;
2086         }
2087 }
2088
2089 static void wacom_calculate_res(struct wacom_features *features)
2090 {
2091         /* set unit to "100th of a mm" for devices not reported by HID */
2092         if (!features->unit) {
2093                 features->unit = 0x11;
2094                 features->unitExpo = -3;
2095         }
2096
2097         features->x_resolution = wacom_calc_hid_res(features->x_max,
2098                                                     features->x_phy,
2099                                                     features->unit,
2100                                                     features->unitExpo);
2101         features->y_resolution = wacom_calc_hid_res(features->y_max,
2102                                                     features->y_phy,
2103                                                     features->unit,
2104                                                     features->unitExpo);
2105 }
2106
2107 void wacom_battery_work(struct work_struct *work)
2108 {
2109         struct wacom *wacom = container_of(work, struct wacom, battery_work);
2110
2111         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2112              !wacom->battery.battery) {
2113                 wacom_initialize_battery(wacom);
2114         }
2115         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
2116                  wacom->battery.battery) {
2117                 wacom_destroy_battery(wacom);
2118         }
2119 }
2120
2121 static size_t wacom_compute_pktlen(struct hid_device *hdev)
2122 {
2123         struct hid_report_enum *report_enum;
2124         struct hid_report *report;
2125         size_t size = 0;
2126
2127         report_enum = hdev->report_enum + HID_INPUT_REPORT;
2128
2129         list_for_each_entry(report, &report_enum->report_list, list) {
2130                 size_t report_size = hid_report_len(report);
2131                 if (report_size > size)
2132                         size = report_size;
2133         }
2134
2135         return size;
2136 }
2137
2138 static void wacom_update_name(struct wacom *wacom, const char *suffix)
2139 {
2140         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2141         struct wacom_features *features = &wacom_wac->features;
2142         char name[WACOM_NAME_MAX];
2143
2144         /* Generic devices name unspecified */
2145         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
2146                 char *product_name = wacom->hdev->name;
2147
2148                 if (hid_is_using_ll_driver(wacom->hdev, &usb_hid_driver)) {
2149                         struct usb_interface *intf = to_usb_interface(wacom->hdev->dev.parent);
2150                         struct usb_device *dev = interface_to_usbdev(intf);
2151                         product_name = dev->product;
2152                 }
2153
2154                 if (wacom->hdev->bus == BUS_I2C) {
2155                         snprintf(name, sizeof(name), "%s %X",
2156                                  features->name, wacom->hdev->product);
2157                 } else if (strstr(product_name, "Wacom") ||
2158                            strstr(product_name, "wacom") ||
2159                            strstr(product_name, "WACOM")) {
2160                         strlcpy(name, product_name, sizeof(name));
2161                 } else {
2162                         snprintf(name, sizeof(name), "Wacom %s", product_name);
2163                 }
2164
2165                 /* strip out excess whitespaces */
2166                 while (1) {
2167                         char *gap = strstr(name, "  ");
2168                         if (gap == NULL)
2169                                 break;
2170                         /* shift everything including the terminator */
2171                         memmove(gap, gap+1, strlen(gap));
2172                 }
2173
2174                 /* get rid of trailing whitespace */
2175                 if (name[strlen(name)-1] == ' ')
2176                         name[strlen(name)-1] = '\0';
2177         } else {
2178                 strlcpy(name, features->name, sizeof(name));
2179         }
2180
2181         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
2182                  name, suffix);
2183
2184         /* Append the device type to the name */
2185         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
2186                 "%s%s Pen", name, suffix);
2187         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
2188                 "%s%s Finger", name, suffix);
2189         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
2190                 "%s%s Pad", name, suffix);
2191 }
2192
2193 static void wacom_release_resources(struct wacom *wacom)
2194 {
2195         struct hid_device *hdev = wacom->hdev;
2196
2197         if (!wacom->resources)
2198                 return;
2199
2200         devres_release_group(&hdev->dev, wacom);
2201
2202         wacom->resources = false;
2203
2204         wacom->wacom_wac.pen_input = NULL;
2205         wacom->wacom_wac.touch_input = NULL;
2206         wacom->wacom_wac.pad_input = NULL;
2207 }
2208
2209 static void wacom_set_shared_values(struct wacom_wac *wacom_wac)
2210 {
2211         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH) {
2212                 wacom_wac->shared->type = wacom_wac->features.type;
2213                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2214         }
2215
2216         if (wacom_wac->has_mute_touch_switch) {
2217                 wacom_wac->shared->has_mute_touch_switch = true;
2218                 wacom_wac->shared->is_touch_on = true;
2219         }
2220
2221         if (wacom_wac->shared->has_mute_touch_switch &&
2222             wacom_wac->shared->touch_input) {
2223                 set_bit(EV_SW, wacom_wac->shared->touch_input->evbit);
2224                 input_set_capability(wacom_wac->shared->touch_input, EV_SW,
2225                                      SW_MUTE_DEVICE);
2226         }
2227 }
2228
2229 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
2230 {
2231         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2232         struct wacom_features *features = &wacom_wac->features;
2233         struct hid_device *hdev = wacom->hdev;
2234         int error;
2235         unsigned int connect_mask = HID_CONNECT_HIDRAW;
2236
2237         features->pktlen = wacom_compute_pktlen(hdev);
2238         if (features->pktlen > WACOM_PKGLEN_MAX)
2239                 return -EINVAL;
2240
2241         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
2242                 return -ENOMEM;
2243
2244         wacom->resources = true;
2245
2246         error = wacom_allocate_inputs(wacom);
2247         if (error)
2248                 goto fail;
2249
2250         /*
2251          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
2252          * into debug mode for the touch part.
2253          * We ignore the other interfaces.
2254          */
2255         if (features->type == BAMBOO_PAD) {
2256                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
2257                         features->type = HID_GENERIC;
2258                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
2259                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
2260                         error = -ENODEV;
2261                         goto fail;
2262                 }
2263         }
2264
2265         /* set the default size in case we do not get them from hid */
2266         wacom_set_default_phy(features);
2267
2268         /* Retrieve the physical and logical size for touch devices */
2269         wacom_retrieve_hid_descriptor(hdev, features);
2270         wacom_setup_device_quirks(wacom);
2271
2272         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2273             features->type != WIRELESS) {
2274                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2275
2276                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2277                          hdev->name,
2278                          error ? "Ignoring" : "Assuming pen");
2279
2280                 if (error)
2281                         goto fail;
2282
2283                 features->device_type |= WACOM_DEVICETYPE_PEN;
2284         }
2285
2286         wacom_calculate_res(features);
2287
2288         wacom_update_name(wacom, wireless ? " (WL)" : "");
2289
2290         /* pen only Bamboo neither support touch nor pad */
2291         if ((features->type == BAMBOO_PEN) &&
2292             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2293             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2294                 error = -ENODEV;
2295                 goto fail;
2296         }
2297
2298         error = wacom_add_shared_data(hdev);
2299         if (error)
2300                 goto fail;
2301
2302         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2303              (features->quirks & WACOM_QUIRK_BATTERY)) {
2304                 error = wacom_initialize_battery(wacom);
2305                 if (error)
2306                         goto fail;
2307         }
2308
2309         error = wacom_register_inputs(wacom);
2310         if (error)
2311                 goto fail;
2312
2313         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2314                 error = wacom_initialize_leds(wacom);
2315                 if (error)
2316                         goto fail;
2317
2318                 error = wacom_initialize_remotes(wacom);
2319                 if (error)
2320                         goto fail;
2321         }
2322
2323         if (features->type == HID_GENERIC)
2324                 connect_mask |= HID_CONNECT_DRIVER;
2325
2326         /* Regular HID work starts now */
2327         error = hid_hw_start(hdev, connect_mask);
2328         if (error) {
2329                 hid_err(hdev, "hw start failed\n");
2330                 goto fail;
2331         }
2332
2333         if (!wireless) {
2334                 /* Note that if query fails it is not a hard failure */
2335                 wacom_query_tablet_data(wacom);
2336         }
2337
2338         /* touch only Bamboo doesn't support pen */
2339         if ((features->type == BAMBOO_TOUCH) &&
2340             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2341                 cancel_delayed_work_sync(&wacom->init_work);
2342                 _wacom_query_tablet_data(wacom);
2343                 error = -ENODEV;
2344                 goto fail_quirks;
2345         }
2346
2347         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2348                 error = hid_hw_open(hdev);
2349
2350         wacom_set_shared_values(wacom_wac);
2351         devres_close_group(&hdev->dev, wacom);
2352
2353         return 0;
2354
2355 fail_quirks:
2356         hid_hw_stop(hdev);
2357 fail:
2358         wacom_release_resources(wacom);
2359         return error;
2360 }
2361
2362 static void wacom_wireless_work(struct work_struct *work)
2363 {
2364         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2365         struct usb_device *usbdev = wacom->usbdev;
2366         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2367         struct hid_device *hdev1, *hdev2;
2368         struct wacom *wacom1, *wacom2;
2369         struct wacom_wac *wacom_wac1, *wacom_wac2;
2370         int error;
2371
2372         /*
2373          * Regardless if this is a disconnect or a new tablet,
2374          * remove any existing input and battery devices.
2375          */
2376
2377         wacom_destroy_battery(wacom);
2378
2379         /* Stylus interface */
2380         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2381         wacom1 = hid_get_drvdata(hdev1);
2382         wacom_wac1 = &(wacom1->wacom_wac);
2383         wacom_release_resources(wacom1);
2384
2385         /* Touch interface */
2386         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2387         wacom2 = hid_get_drvdata(hdev2);
2388         wacom_wac2 = &(wacom2->wacom_wac);
2389         wacom_release_resources(wacom2);
2390
2391         if (wacom_wac->pid == 0) {
2392                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2393         } else {
2394                 const struct hid_device_id *id = wacom_ids;
2395
2396                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2397                          wacom_wac->pid);
2398
2399                 while (id->bus) {
2400                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2401                             id->product == wacom_wac->pid)
2402                                 break;
2403                         id++;
2404                 }
2405
2406                 if (!id->bus) {
2407                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2408                         return;
2409                 }
2410
2411                 /* Stylus interface */
2412                 wacom_wac1->features =
2413                         *((struct wacom_features *)id->driver_data);
2414
2415                 wacom_wac1->pid = wacom_wac->pid;
2416                 hid_hw_stop(hdev1);
2417                 error = wacom_parse_and_register(wacom1, true);
2418                 if (error)
2419                         goto fail;
2420
2421                 /* Touch interface */
2422                 if (wacom_wac1->features.touch_max ||
2423                     (wacom_wac1->features.type >= INTUOSHT &&
2424                     wacom_wac1->features.type <= BAMBOO_PT)) {
2425                         wacom_wac2->features =
2426                                 *((struct wacom_features *)id->driver_data);
2427                         wacom_wac2->pid = wacom_wac->pid;
2428                         hid_hw_stop(hdev2);
2429                         error = wacom_parse_and_register(wacom2, true);
2430                         if (error)
2431                                 goto fail;
2432                 }
2433
2434                 strlcpy(wacom_wac->name, wacom_wac1->name,
2435                         sizeof(wacom_wac->name));
2436                 error = wacom_initialize_battery(wacom);
2437                 if (error)
2438                         goto fail;
2439         }
2440
2441         return;
2442
2443 fail:
2444         wacom_release_resources(wacom1);
2445         wacom_release_resources(wacom2);
2446         return;
2447 }
2448
2449 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2450 {
2451         struct wacom_remote *remote = wacom->remote;
2452         u32 serial = remote->remotes[index].serial;
2453         int i;
2454         unsigned long flags;
2455
2456         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2457                 if (remote->remotes[i].serial == serial) {
2458
2459                         spin_lock_irqsave(&remote->remote_lock, flags);
2460                         remote->remotes[i].registered = false;
2461                         spin_unlock_irqrestore(&remote->remote_lock, flags);
2462
2463                         if (remote->remotes[i].battery.battery)
2464                                 devres_release_group(&wacom->hdev->dev,
2465                                                      &remote->remotes[i].battery.bat_desc);
2466
2467                         if (remote->remotes[i].group.name)
2468                                 devres_release_group(&wacom->hdev->dev,
2469                                                      &remote->remotes[i]);
2470
2471                         remote->remotes[i].serial = 0;
2472                         remote->remotes[i].group.name = NULL;
2473                         remote->remotes[i].battery.battery = NULL;
2474                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2475                 }
2476         }
2477 }
2478
2479 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2480                                    unsigned int index)
2481 {
2482         struct wacom_remote *remote = wacom->remote;
2483         struct device *dev = &wacom->hdev->dev;
2484         int error, k;
2485
2486         /* A remote can pair more than once with an EKR,
2487          * check to make sure this serial isn't already paired.
2488          */
2489         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2490                 if (remote->remotes[k].serial == serial)
2491                         break;
2492         }
2493
2494         if (k < WACOM_MAX_REMOTES) {
2495                 remote->remotes[index].serial = serial;
2496                 return 0;
2497         }
2498
2499         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2500                 return -ENOMEM;
2501
2502         error = wacom_remote_create_attr_group(wacom, serial, index);
2503         if (error)
2504                 goto fail;
2505
2506         remote->remotes[index].input = wacom_allocate_input(wacom);
2507         if (!remote->remotes[index].input) {
2508                 error = -ENOMEM;
2509                 goto fail;
2510         }
2511         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2512         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2513
2514         if (!remote->remotes[index].input->name) {
2515                 error = -EINVAL;
2516                 goto fail;
2517         }
2518
2519         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2520                                                    &wacom->wacom_wac);
2521         if (error)
2522                 goto fail;
2523
2524         remote->remotes[index].serial = serial;
2525
2526         error = input_register_device(remote->remotes[index].input);
2527         if (error)
2528                 goto fail;
2529
2530         error = wacom_led_groups_alloc_and_register_one(
2531                                         &remote->remotes[index].input->dev,
2532                                         wacom, index, 3, true);
2533         if (error)
2534                 goto fail;
2535
2536         remote->remotes[index].registered = true;
2537
2538         devres_close_group(dev, &remote->remotes[index]);
2539         return 0;
2540
2541 fail:
2542         devres_release_group(dev, &remote->remotes[index]);
2543         remote->remotes[index].serial = 0;
2544         return error;
2545 }
2546
2547 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2548 {
2549         struct wacom_remote *remote = wacom->remote;
2550         int error;
2551
2552         if (!remote->remotes[index].registered)
2553                 return 0;
2554
2555         if (remote->remotes[index].battery.battery)
2556                 return 0;
2557
2558         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2559                 return 0;
2560
2561         error = __wacom_initialize_battery(wacom,
2562                                         &wacom->remote->remotes[index].battery);
2563         if (error)
2564                 return error;
2565
2566         return 0;
2567 }
2568
2569 static void wacom_remote_work(struct work_struct *work)
2570 {
2571         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2572         struct wacom_remote *remote = wacom->remote;
2573         struct wacom_remote_data data;
2574         unsigned long flags;
2575         unsigned int count;
2576         u32 serial;
2577         int i;
2578
2579         spin_lock_irqsave(&remote->remote_lock, flags);
2580
2581         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2582
2583         if (count != sizeof(data)) {
2584                 hid_err(wacom->hdev,
2585                         "workitem triggered without status available\n");
2586                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2587                 return;
2588         }
2589
2590         if (!kfifo_is_empty(&remote->remote_fifo))
2591                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2592
2593         spin_unlock_irqrestore(&remote->remote_lock, flags);
2594
2595         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2596                 serial = data.remote[i].serial;
2597                 if (data.remote[i].connected) {
2598
2599                         if (remote->remotes[i].serial == serial) {
2600                                 wacom_remote_attach_battery(wacom, i);
2601                                 continue;
2602                         }
2603
2604                         if (remote->remotes[i].serial)
2605                                 wacom_remote_destroy_one(wacom, i);
2606
2607                         wacom_remote_create_one(wacom, serial, i);
2608
2609                 } else if (remote->remotes[i].serial) {
2610                         wacom_remote_destroy_one(wacom, i);
2611                 }
2612         }
2613 }
2614
2615 static void wacom_mode_change_work(struct work_struct *work)
2616 {
2617         struct wacom *wacom = container_of(work, struct wacom, mode_change_work);
2618         struct wacom_shared *shared = wacom->wacom_wac.shared;
2619         struct wacom *wacom1 = NULL;
2620         struct wacom *wacom2 = NULL;
2621         bool is_direct = wacom->wacom_wac.is_direct_mode;
2622         int error = 0;
2623
2624         if (shared->pen) {
2625                 wacom1 = hid_get_drvdata(shared->pen);
2626                 wacom_release_resources(wacom1);
2627                 hid_hw_stop(wacom1->hdev);
2628                 wacom1->wacom_wac.has_mode_change = true;
2629                 wacom1->wacom_wac.is_direct_mode = is_direct;
2630         }
2631
2632         if (shared->touch) {
2633                 wacom2 = hid_get_drvdata(shared->touch);
2634                 wacom_release_resources(wacom2);
2635                 hid_hw_stop(wacom2->hdev);
2636                 wacom2->wacom_wac.has_mode_change = true;
2637                 wacom2->wacom_wac.is_direct_mode = is_direct;
2638         }
2639
2640         if (wacom1) {
2641                 error = wacom_parse_and_register(wacom1, false);
2642                 if (error)
2643                         return;
2644         }
2645
2646         if (wacom2) {
2647                 error = wacom_parse_and_register(wacom2, false);
2648                 if (error)
2649                         return;
2650         }
2651
2652         return;
2653 }
2654
2655 static int wacom_probe(struct hid_device *hdev,
2656                 const struct hid_device_id *id)
2657 {
2658         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2659         struct usb_device *dev = interface_to_usbdev(intf);
2660         struct wacom *wacom;
2661         struct wacom_wac *wacom_wac;
2662         struct wacom_features *features;
2663         int error;
2664
2665         if (!id->driver_data)
2666                 return -EINVAL;
2667
2668         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2669
2670         /* hid-core sets this quirk for the boot interface */
2671         hdev->quirks &= ~HID_QUIRK_NOGET;
2672
2673         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2674         if (!wacom)
2675                 return -ENOMEM;
2676
2677         hid_set_drvdata(hdev, wacom);
2678         wacom->hdev = hdev;
2679
2680         wacom_wac = &wacom->wacom_wac;
2681         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2682         features = &wacom_wac->features;
2683
2684         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2685                 error = -ENODEV;
2686                 goto fail;
2687         }
2688
2689         error = kfifo_alloc(&wacom_wac->pen_fifo, WACOM_PKGLEN_MAX, GFP_KERNEL);
2690         if (error)
2691                 goto fail;
2692
2693         wacom_wac->hid_data.inputmode = -1;
2694         wacom_wac->mode_report = -1;
2695
2696         wacom->usbdev = dev;
2697         wacom->intf = intf;
2698         mutex_init(&wacom->lock);
2699         INIT_DELAYED_WORK(&wacom->init_work, wacom_init_work);
2700         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2701         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2702         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2703         INIT_WORK(&wacom->mode_change_work, wacom_mode_change_work);
2704
2705         /* ask for the report descriptor to be loaded by HID */
2706         error = hid_parse(hdev);
2707         if (error) {
2708                 hid_err(hdev, "parse failed\n");
2709                 goto fail;
2710         }
2711
2712         error = wacom_parse_and_register(wacom, false);
2713         if (error)
2714                 goto fail;
2715
2716         if (hdev->bus == BUS_BLUETOOTH) {
2717                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2718                 if (error)
2719                         hid_warn(hdev,
2720                                  "can't create sysfs speed attribute err: %d\n",
2721                                  error);
2722         }
2723
2724         return 0;
2725
2726 fail:
2727         hid_set_drvdata(hdev, NULL);
2728         return error;
2729 }
2730
2731 static void wacom_remove(struct hid_device *hdev)
2732 {
2733         struct wacom *wacom = hid_get_drvdata(hdev);
2734         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2735         struct wacom_features *features = &wacom_wac->features;
2736
2737         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2738                 hid_hw_close(hdev);
2739
2740         hid_hw_stop(hdev);
2741
2742         cancel_delayed_work_sync(&wacom->init_work);
2743         cancel_work_sync(&wacom->wireless_work);
2744         cancel_work_sync(&wacom->battery_work);
2745         cancel_work_sync(&wacom->remote_work);
2746         cancel_work_sync(&wacom->mode_change_work);
2747         if (hdev->bus == BUS_BLUETOOTH)
2748                 device_remove_file(&hdev->dev, &dev_attr_speed);
2749
2750         /* make sure we don't trigger the LEDs */
2751         wacom_led_groups_release(wacom);
2752
2753         if (wacom->wacom_wac.features.type != REMOTE)
2754                 wacom_release_resources(wacom);
2755
2756         kfifo_free(&wacom_wac->pen_fifo);
2757
2758         hid_set_drvdata(hdev, NULL);
2759 }
2760
2761 #ifdef CONFIG_PM
2762 static int wacom_resume(struct hid_device *hdev)
2763 {
2764         struct wacom *wacom = hid_get_drvdata(hdev);
2765
2766         mutex_lock(&wacom->lock);
2767
2768         /* switch to wacom mode first */
2769         _wacom_query_tablet_data(wacom);
2770         wacom_led_control(wacom);
2771
2772         mutex_unlock(&wacom->lock);
2773
2774         return 0;
2775 }
2776
2777 static int wacom_reset_resume(struct hid_device *hdev)
2778 {
2779         return wacom_resume(hdev);
2780 }
2781 #endif /* CONFIG_PM */
2782
2783 static struct hid_driver wacom_driver = {
2784         .name =         "wacom",
2785         .id_table =     wacom_ids,
2786         .probe =        wacom_probe,
2787         .remove =       wacom_remove,
2788         .report =       wacom_wac_report,
2789 #ifdef CONFIG_PM
2790         .resume =       wacom_resume,
2791         .reset_resume = wacom_reset_resume,
2792 #endif
2793         .raw_event =    wacom_raw_event,
2794 };
2795 module_hid_driver(wacom_driver);
2796
2797 MODULE_VERSION(DRIVER_VERSION);
2798 MODULE_AUTHOR(DRIVER_AUTHOR);
2799 MODULE_DESCRIPTION(DRIVER_DESC);
2800 MODULE_LICENSE("GPL");