drivers/hid/wacom_sys.c

   1 /*
   2  * drivers/input/tablet/wacom_sys.c
   3  *
   4  *  USB Wacom tablet support - system specific code
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include "wacom_wac.h"
  15 #include "wacom.h"
  16 #include <linux/input/mt.h>
  17
  18 #define WAC_MSG_RETRIES         5
  19
  20 #define WAC_CMD_WL_LED_CONTROL  0x03
  21 #define WAC_CMD_LED_CONTROL     0x20
  22 #define WAC_CMD_ICON_START      0x21
  23 #define WAC_CMD_ICON_XFER       0x23
  24 #define WAC_CMD_ICON_BT_XFER    0x26
  25 #define WAC_CMD_RETRIES         10
  26 #define WAC_CMD_DELETE_PAIRING  0x20
  27 #define WAC_CMD_UNPAIR_ALL      0xFF
  28
  29 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  30 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  31 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
  32
  33 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  34                             size_t size, unsigned int retries)
  35 {
  36         int retval;
  37
  38         do {
  39                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  40                                 HID_REQ_GET_REPORT);
  41         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  42
  43         if (retval < 0)
  44                 hid_err(hdev, "wacom_get_report: ran out of retries "
  45                         "(last error = %d)\n", retval);
  46
  47         return retval;
  48 }
  49
  50 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  51                             size_t size, unsigned int retries)
  52 {
  53         int retval;
  54
  55         do {
  56                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  57                                 HID_REQ_SET_REPORT);
  58         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  59
  60         if (retval < 0)
  61                 hid_err(hdev, "wacom_set_report: ran out of retries "
  62                         "(last error = %d)\n", retval);
  63
  64         return retval;
  65 }
  66
  67 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  68                 u8 *raw_data, int size)
  69 {
  70         struct wacom *wacom = hid_get_drvdata(hdev);
  71
  72         if (size > WACOM_PKGLEN_MAX)
  73                 return 1;
  74
  75         memcpy(wacom->wacom_wac.data, raw_data, size);
  76
  77         wacom_wac_irq(&wacom->wacom_wac, size);
  78
  79         return 0;
  80 }
  81
  82 static int wacom_open(struct input_dev *dev)
  83 {
  84         struct wacom *wacom = input_get_drvdata(dev);
  85
  86         return hid_hw_open(wacom->hdev);
  87 }
  88
  89 static void wacom_close(struct input_dev *dev)
  90 {
  91         struct wacom *wacom = input_get_drvdata(dev);
  92
  93         /*
  94          * wacom->hdev should never be null, but surprisingly, I had the case
  95          * once while unplugging the Wacom Wireless Receiver.
  96          */
  97         if (wacom->hdev)
  98                 hid_hw_close(wacom->hdev);
  99 }
 100
 101 /*
 102  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
 103  */
 104 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
 105                                unsigned unit, int exponent)
 106 {
 107         struct hid_field field = {
 108                 .logical_maximum = logical_extents,
 109                 .physical_maximum = physical_extents,
 110                 .unit = unit,
 111                 .unit_exponent = exponent,
 112         };
 113
 114         return hidinput_calc_abs_res(&field, ABS_X);
 115 }
 116
 117 static void wacom_feature_mapping(struct hid_device *hdev,
 118                 struct hid_field *field, struct hid_usage *usage)
 119 {
 120         struct wacom *wacom = hid_get_drvdata(hdev);
 121         struct wacom_features *features = &wacom->wacom_wac.features;
 122         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 123         u8 *data;
 124         int ret;
 125
 126         switch (usage->hid) {
 127         case HID_DG_CONTACTMAX:
 128                 /* leave touch_max as is if predefined */
 129                 if (!features->touch_max) {
 130                         /* read manually */
 131                         data = kzalloc(2, GFP_KERNEL);
 132                         if (!data)
 133                                 break;
 134                         data[0] = field->report->id;
 135                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 136                                                 data, 2, WAC_CMD_RETRIES);
 137                         if (ret == 2) {
 138                                 features->touch_max = data[1];
 139                         } else {
 140                                 features->touch_max = 16;
 141                                 hid_warn(hdev, "wacom_feature_mapping: "
 142                                          "could not get HID_DG_CONTACTMAX, "
 143                                          "defaulting to %d\n",
 144                                           features->touch_max);
 145                         }
 146                         kfree(data);
 147                 }
 148                 break;
 149         case HID_DG_INPUTMODE:
 150                 /* Ignore if value index is out of bounds. */
 151                 if (usage->usage_index >= field->report_count) {
 152                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 153                         break;
 154                 }
 155
 156                 hid_data->inputmode = field->report->id;
 157                 hid_data->inputmode_index = usage->usage_index;
 158                 break;
 159
 160         case HID_UP_DIGITIZER:
 161                 if (field->report->id == 0x0B &&
 162                     (field->application == WACOM_G9_DIGITIZER ||
 163                      field->application == WACOM_G11_DIGITIZER)) {
 164                         wacom->wacom_wac.mode_report = field->report->id;
 165                         wacom->wacom_wac.mode_value = 0;
 166                 }
 167                 break;
 168
 169         case WACOM_G9_PAGE:
 170         case WACOM_G11_PAGE:
 171                 if (field->report->id == 0x03 &&
 172                     (field->application == WACOM_G9_TOUCHSCREEN ||
 173                      field->application == WACOM_G11_TOUCHSCREEN)) {
 174                         wacom->wacom_wac.mode_report = field->report->id;
 175                         wacom->wacom_wac.mode_value = 0;
 176                 }
 177                 break;
 178         }
 179 }
 180
 181 /*
 182  * Interface Descriptor of wacom devices can be incomplete and
 183  * inconsistent so wacom_features table is used to store stylus
 184  * device's packet lengths, various maximum values, and tablet
 185  * resolution based on product ID's.
 186  *
 187  * For devices that contain 2 interfaces, wacom_features table is
 188  * inaccurate for the touch interface.  Since the Interface Descriptor
 189  * for touch interfaces has pretty complete data, this function exists
 190  * to query tablet for this missing information instead of hard coding in
 191  * an additional table.
 192  *
 193  * A typical Interface Descriptor for a stylus will contain a
 194  * boot mouse application collection that is not of interest and this
 195  * function will ignore it.
 196  *
 197  * It also contains a digitizer application collection that also is not
 198  * of interest since any information it contains would be duplicate
 199  * of what is in wacom_features. Usually it defines a report of an array
 200  * of bytes that could be used as max length of the stylus packet returned.
 201  * If it happens to define a Digitizer-Stylus Physical Collection then
 202  * the X and Y logical values contain valid data but it is ignored.
 203  *
 204  * A typical Interface Descriptor for a touch interface will contain a
 205  * Digitizer-Finger Physical Collection which will define both logical
 206  * X/Y maximum as well as the physical size of tablet. Since touch
 207  * interfaces haven't supported pressure or distance, this is enough
 208  * information to override invalid values in the wacom_features table.
 209  *
 210  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 211  * data. We deal with them after returning from this function.
 212  */
 213 static void wacom_usage_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         bool finger = WACOM_FINGER_FIELD(field);
 219         bool pen = WACOM_PEN_FIELD(field);
 220
 221         /*
 222         * Requiring Stylus Usage will ignore boot mouse
 223         * X/Y values and some cases of invalid Digitizer X/Y
 224         * values commonly reported.
 225         */
 226         if (pen)
 227                 features->device_type |= WACOM_DEVICETYPE_PEN;
 228         else if (finger)
 229                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 230         else
 231                 return;
 232
 233         /*
 234          * Bamboo models do not support HID_DG_CONTACTMAX.
 235          * And, Bamboo Pen only descriptor contains touch.
 236          */
 237         if (features->type > BAMBOO_PT) {
 238                 /* ISDv4 touch devices at least supports one touch point */
 239                 if (finger && !features->touch_max)
 240                         features->touch_max = 1;
 241         }
 242
 243         switch (usage->hid) {
 244         case HID_GD_X:
 245                 features->x_max = field->logical_maximum;
 246                 if (finger) {
 247                         features->x_phy = field->physical_maximum;
 248                         if ((features->type != BAMBOO_PT) &&
 249                             (features->type != BAMBOO_TOUCH)) {
 250                                 features->unit = field->unit;
 251                                 features->unitExpo = field->unit_exponent;
 252                         }
 253                 }
 254                 break;
 255         case HID_GD_Y:
 256                 features->y_max = field->logical_maximum;
 257                 if (finger) {
 258                         features->y_phy = field->physical_maximum;
 259                         if ((features->type != BAMBOO_PT) &&
 260                             (features->type != BAMBOO_TOUCH)) {
 261                                 features->unit = field->unit;
 262                                 features->unitExpo = field->unit_exponent;
 263                         }
 264                 }
 265                 break;
 266         case HID_DG_TIPPRESSURE:
 267                 if (pen)
 268                         features->pressure_max = field->logical_maximum;
 269                 break;
 270         }
 271
 272         if (features->type == HID_GENERIC)
 273                 wacom_wac_usage_mapping(hdev, field, usage);
 274 }
 275
 276 static void wacom_post_parse_hid(struct hid_device *hdev,
 277                                  struct wacom_features *features)
 278 {
 279         struct wacom *wacom = hid_get_drvdata(hdev);
 280         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 281
 282         if (features->type == HID_GENERIC) {
 283                 /* Any last-minute generic device setup */
 284                 if (features->touch_max > 1) {
 285                         input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
 286                                     INPUT_MT_DIRECT);
 287                 }
 288         }
 289 }
 290
 291 static void wacom_parse_hid(struct hid_device *hdev,
 292                            struct wacom_features *features)
 293 {
 294         struct hid_report_enum *rep_enum;
 295         struct hid_report *hreport;
 296         int i, j;
 297
 298         /* check features first */
 299         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 300         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 301                 for (i = 0; i < hreport->maxfield; i++) {
 302                         /* Ignore if report count is out of bounds. */
 303                         if (hreport->field[i]->report_count < 1)
 304                                 continue;
 305
 306                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 307                                 wacom_feature_mapping(hdev, hreport->field[i],
 308                                                 hreport->field[i]->usage + j);
 309                         }
 310                 }
 311         }
 312
 313         /* now check the input usages */
 314         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 315         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 316
 317                 if (!hreport->maxfield)
 318                         continue;
 319
 320                 for (i = 0; i < hreport->maxfield; i++)
 321                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 322                                 wacom_usage_mapping(hdev, hreport->field[i],
 323                                                 hreport->field[i]->usage + j);
 324         }
 325
 326         wacom_post_parse_hid(hdev, features);
 327 }
 328
 329 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 330 {
 331         struct wacom *wacom = hid_get_drvdata(hdev);
 332         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 333         struct hid_report *r;
 334         struct hid_report_enum *re;
 335
 336         if (hid_data->inputmode < 0)
 337                 return 0;
 338
 339         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 340         r = re->report_id_hash[hid_data->inputmode];
 341         if (r) {
 342                 r->field[0]->value[hid_data->inputmode_index] = 2;
 343                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 344         }
 345         return 0;
 346 }
 347
 348 static int wacom_set_device_mode(struct hid_device *hdev,
 349                                  struct wacom_wac *wacom_wac)
 350 {
 351         u8 *rep_data;
 352         struct hid_report *r;
 353         struct hid_report_enum *re;
 354         int length;
 355         int error = -ENOMEM, limit = 0;
 356
 357         if (wacom_wac->mode_report < 0)
 358                 return 0;
 359
 360         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 361         r = re->report_id_hash[wacom_wac->mode_report];
 362         if (!r)
 363                 return -EINVAL;
 364
 365         rep_data = hid_alloc_report_buf(r, GFP_KERNEL);
 366         if (!rep_data)
 367                 return -ENOMEM;
 368
 369         length = hid_report_len(r);
 370
 371         do {
 372                 rep_data[0] = wacom_wac->mode_report;
 373                 rep_data[1] = wacom_wac->mode_value;
 374
 375                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 376                                          length, 1);
 377                 if (error >= 0)
 378                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 379                                                  rep_data, length, 1);
 380         } while (error >= 0 &&
 381                  rep_data[1] != wacom_wac->mode_report &&
 382                  limit++ < WAC_MSG_RETRIES);
 383
 384         kfree(rep_data);
 385
 386         return error < 0 ? error : 0;
 387 }
 388
 389 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 390                 struct wacom_features *features)
 391 {
 392         struct wacom *wacom = hid_get_drvdata(hdev);
 393         int ret;
 394         u8 rep_data[2];
 395
 396         switch (features->type) {
 397         case GRAPHIRE_BT:
 398                 rep_data[0] = 0x03;
 399                 rep_data[1] = 0x00;
 400                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 401                                         3);
 402
 403                 if (ret >= 0) {
 404                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 405                         rep_data[1] = 0x00;
 406
 407                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 408                                                 rep_data, 2, 3);
 409
 410                         if (ret >= 0) {
 411                                 wacom->wacom_wac.bt_high_speed = speed;
 412                                 return 0;
 413                         }
 414                 }
 415
 416                 /*
 417                  * Note that if the raw queries fail, it's not a hard failure
 418                  * and it is safe to continue
 419                  */
 420                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 421                          rep_data[0], ret);
 422                 break;
 423         case INTUOS4WL:
 424                 if (speed == 1)
 425                         wacom->wacom_wac.bt_features &= ~0x20;
 426                 else
 427                         wacom->wacom_wac.bt_features |= 0x20;
 428
 429                 rep_data[0] = 0x03;
 430                 rep_data[1] = wacom->wacom_wac.bt_features;
 431
 432                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 433                                         1);
 434                 if (ret >= 0)
 435                         wacom->wacom_wac.bt_high_speed = speed;
 436                 break;
 437         }
 438
 439         return 0;
 440 }
 441
 442 /*
 443  * Switch the tablet into its most-capable mode. Wacom tablets are
 444  * typically configured to power-up in a mode which sends mouse-like
 445  * reports to the OS. To get absolute position, pressure data, etc.
 446  * from the tablet, it is necessary to switch the tablet out of this
 447  * mode and into one which sends the full range of tablet data.
 448  */
 449 static int wacom_query_tablet_data(struct hid_device *hdev,
 450                 struct wacom_features *features)
 451 {
 452         struct wacom *wacom = hid_get_drvdata(hdev);
 453         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 454
 455         if (hdev->bus == BUS_BLUETOOTH)
 456                 return wacom_bt_query_tablet_data(hdev, 1, features);
 457
 458         if (features->type != HID_GENERIC) {
 459                 if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 460                         if (features->type > TABLETPC) {
 461                                 /* MT Tablet PC touch */
 462                                 wacom_wac->mode_report = 3;
 463                                 wacom_wac->mode_value = 4;
 464                         } else if (features->type == WACOM_24HDT) {
 465                                 wacom_wac->mode_report = 18;
 466                                 wacom_wac->mode_value = 2;
 467                         } else if (features->type == WACOM_27QHDT) {
 468                                 wacom_wac->mode_report = 131;
 469                                 wacom_wac->mode_value = 2;
 470                         } else if (features->type == BAMBOO_PAD) {
 471                                 wacom_wac->mode_report = 2;
 472                                 wacom_wac->mode_value = 2;
 473                         }
 474                 } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 475                         if (features->type <= BAMBOO_PT) {
 476                                 wacom_wac->mode_report = 2;
 477                                 wacom_wac->mode_value = 2;
 478                         }
 479                 }
 480         }
 481
 482         wacom_set_device_mode(hdev, wacom_wac);
 483
 484         if (features->type == HID_GENERIC)
 485                 return wacom_hid_set_device_mode(hdev);
 486
 487         return 0;
 488 }
 489
 490 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 491                                          struct wacom_features *features)
 492 {
 493         struct wacom *wacom = hid_get_drvdata(hdev);
 494         struct usb_interface *intf = wacom->intf;
 495
 496         /* default features */
 497         features->x_fuzz = 4;
 498         features->y_fuzz = 4;
 499         features->pressure_fuzz = 0;
 500         features->distance_fuzz = 1;
 501         features->tilt_fuzz = 1;
 502
 503         /*
 504          * The wireless device HID is basic and layout conflicts with
 505          * other tablets (monitor and touch interface can look like pen).
 506          * Skip the query for this type and modify defaults based on
 507          * interface number.
 508          */
 509         if (features->type == WIRELESS) {
 510                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 511                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 512                 else
 513                         features->device_type = WACOM_DEVICETYPE_NONE;
 514                 return;
 515         }
 516
 517         wacom_parse_hid(hdev, features);
 518 }
 519
 520 struct wacom_hdev_data {
 521         struct list_head list;
 522         struct kref kref;
 523         struct hid_device *dev;
 524         struct wacom_shared shared;
 525 };
 526
 527 static LIST_HEAD(wacom_udev_list);
 528 static DEFINE_MUTEX(wacom_udev_list_lock);
 529
 530 static bool wacom_are_sibling(struct hid_device *hdev,
 531                 struct hid_device *sibling)
 532 {
 533         struct wacom *wacom = hid_get_drvdata(hdev);
 534         struct wacom_features *features = &wacom->wacom_wac.features;
 535         int vid = features->oVid;
 536         int pid = features->oPid;
 537         int n1,n2;
 538
 539         if (vid == 0 && pid == 0) {
 540                 vid = hdev->vendor;
 541                 pid = hdev->product;
 542         }
 543
 544         if (vid != sibling->vendor || pid != sibling->product)
 545                 return false;
 546
 547         /* Compare the physical path. */
 548         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 549         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 550         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 551                 return false;
 552
 553         return !strncmp(hdev->phys, sibling->phys, n1);
 554 }
 555
 556 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 557 {
 558         struct wacom_hdev_data *data;
 559
 560         list_for_each_entry(data, &wacom_udev_list, list) {
 561                 if (wacom_are_sibling(hdev, data->dev)) {
 562                         kref_get(&data->kref);
 563                         return data;
 564                 }
 565         }
 566
 567         return NULL;
 568 }
 569
 570 static void wacom_release_shared_data(struct kref *kref)
 571 {
 572         struct wacom_hdev_data *data =
 573                 container_of(kref, struct wacom_hdev_data, kref);
 574
 575         mutex_lock(&wacom_udev_list_lock);
 576         list_del(&data->list);
 577         mutex_unlock(&wacom_udev_list_lock);
 578
 579         kfree(data);
 580 }
 581
 582 static void wacom_remove_shared_data(void *res)
 583 {
 584         struct wacom *wacom = res;
 585         struct wacom_hdev_data *data;
 586         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 587
 588         if (wacom_wac->shared) {
 589                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 590                                     shared);
 591
 592                 if (wacom_wac->shared->touch == wacom->hdev)
 593                         wacom_wac->shared->touch = NULL;
 594                 else if (wacom_wac->shared->pen == wacom->hdev)
 595                         wacom_wac->shared->pen = NULL;
 596
 597                 kref_put(&data->kref, wacom_release_shared_data);
 598                 wacom_wac->shared = NULL;
 599         }
 600 }
 601
 602 static int wacom_add_shared_data(struct hid_device *hdev)
 603 {
 604         struct wacom *wacom = hid_get_drvdata(hdev);
 605         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 606         struct wacom_hdev_data *data;
 607         int retval = 0;
 608
 609         mutex_lock(&wacom_udev_list_lock);
 610
 611         data = wacom_get_hdev_data(hdev);
 612         if (!data) {
 613                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 614                 if (!data) {
 615                         retval = -ENOMEM;
 616                         goto out;
 617                 }
 618
 619                 kref_init(&data->kref);
 620                 data->dev = hdev;
 621                 list_add_tail(&data->list, &wacom_udev_list);
 622         }
 623
 624         wacom_wac->shared = &data->shared;
 625
 626         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
 627         if (retval) {
 628                 mutex_unlock(&wacom_udev_list_lock);
 629                 wacom_remove_shared_data(wacom);
 630                 return retval;
 631         }
 632
 633         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 634                 wacom_wac->shared->touch = hdev;
 635         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 636                 wacom_wac->shared->pen = hdev;
 637
 638 out:
 639         mutex_unlock(&wacom_udev_list_lock);
 640         return retval;
 641 }
 642
 643 static int wacom_led_control(struct wacom *wacom)
 644 {
 645         unsigned char *buf;
 646         int retval;
 647         unsigned char report_id = WAC_CMD_LED_CONTROL;
 648         int buf_size = 9;
 649
 650         if (!hid_get_drvdata(wacom->hdev))
 651                 return -ENODEV;
 652
 653         if (!wacom->led.groups)
 654                 return -ENOTSUPP;
 655
 656         if (wacom->wacom_wac.pid) { /* wireless connected */
 657                 report_id = WAC_CMD_WL_LED_CONTROL;
 658                 buf_size = 13;
 659         }
 660         buf = kzalloc(buf_size, GFP_KERNEL);
 661         if (!buf)
 662                 return -ENOMEM;
 663
 664         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 665             wacom->wacom_wac.features.type <= INTUOSPL) {
 666                 /*
 667                  * Touch Ring and crop mark LED luminance may take on
 668                  * one of four values:
 669                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 670                  */
 671                 int ring_led = wacom->led.groups[0].select & 0x03;
 672                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 673                 int crop_lum = 0;
 674                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 675
 676                 buf[0] = report_id;
 677                 if (wacom->wacom_wac.pid) {
 678                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 679                                          buf, buf_size, WAC_CMD_RETRIES);
 680                         buf[0] = report_id;
 681                         buf[4] = led_bits;
 682                 } else
 683                         buf[1] = led_bits;
 684         }
 685         else {
 686                 int led = wacom->led.groups[0].select | 0x4;
 687
 688                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 689                     wacom->wacom_wac.features.type == WACOM_24HD)
 690                         led |= (wacom->led.groups[1].select << 4) | 0x40;
 691
 692                 buf[0] = report_id;
 693                 buf[1] = led;
 694                 buf[2] = wacom->led.llv;
 695                 buf[3] = wacom->led.hlv;
 696                 buf[4] = wacom->led.img_lum;
 697         }
 698
 699         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 700                                   WAC_CMD_RETRIES);
 701         kfree(buf);
 702
 703         return retval;
 704 }
 705
 706 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 707                 const unsigned len, const void *img)
 708 {
 709         unsigned char *buf;
 710         int i, retval;
 711         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 712
 713         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 714         if (!buf)
 715                 return -ENOMEM;
 716
 717         /* Send 'start' command */
 718         buf[0] = WAC_CMD_ICON_START;
 719         buf[1] = 1;
 720         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 721                                   WAC_CMD_RETRIES);
 722         if (retval < 0)
 723                 goto out;
 724
 725         buf[0] = xfer_id;
 726         buf[1] = button_id & 0x07;
 727         for (i = 0; i < 4; i++) {
 728                 buf[2] = i;
 729                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 730
 731                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 732                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 733                 if (retval < 0)
 734                         break;
 735         }
 736
 737         /* Send 'stop' */
 738         buf[0] = WAC_CMD_ICON_START;
 739         buf[1] = 0;
 740         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 741                          WAC_CMD_RETRIES);
 742
 743 out:
 744         kfree(buf);
 745         return retval;
 746 }
 747
 748 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 749                                       const char *buf, size_t count)
 750 {
 751         struct hid_device *hdev = to_hid_device(dev);
 752         struct wacom *wacom = hid_get_drvdata(hdev);
 753         unsigned int id;
 754         int err;
 755
 756         err = kstrtouint(buf, 10, &id);
 757         if (err)
 758                 return err;
 759
 760         mutex_lock(&wacom->lock);
 761
 762         wacom->led.groups[set_id].select = id & 0x3;
 763         err = wacom_led_control(wacom);
 764
 765         mutex_unlock(&wacom->lock);
 766
 767         return err < 0 ? err : count;
 768 }
 769
 770 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 771 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 772         struct device_attribute *attr, const char *buf, size_t count)   \
 773 {                                                                       \
 774         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 775 }                                                                       \
 776 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 777         struct device_attribute *attr, char *buf)                       \
 778 {                                                                       \
 779         struct hid_device *hdev = to_hid_device(dev);\
 780         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 781         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 782                          wacom->led.groups[SET_ID].select);             \
 783 }                                                                       \
 784 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 785                     wacom_led##SET_ID##_select_show,                    \
 786                     wacom_led##SET_ID##_select_store)
 787
 788 DEVICE_LED_SELECT_ATTR(0);
 789 DEVICE_LED_SELECT_ATTR(1);
 790
 791 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 792                                      const char *buf, size_t count)
 793 {
 794         unsigned int value;
 795         int err;
 796
 797         err = kstrtouint(buf, 10, &value);
 798         if (err)
 799                 return err;
 800
 801         mutex_lock(&wacom->lock);
 802
 803         *dest = value & 0x7f;
 804         err = wacom_led_control(wacom);
 805
 806         mutex_unlock(&wacom->lock);
 807
 808         return err < 0 ? err : count;
 809 }
 810
 811 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 812 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 813         struct device_attribute *attr, const char *buf, size_t count)   \
 814 {                                                                       \
 815         struct hid_device *hdev = to_hid_device(dev);\
 816         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 817                                                                         \
 818         return wacom_luminance_store(wacom, &wacom->led.field,          \
 819                                      buf, count);                       \
 820 }                                                                       \
 821 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 822         struct device_attribute *attr, char *buf)                       \
 823 {                                                                       \
 824         struct wacom *wacom = dev_get_drvdata(dev);                     \
 825         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 826 }                                                                       \
 827 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 828                    wacom_##name##_luminance_show,                       \
 829                    wacom_##name##_luminance_store)
 830
 831 DEVICE_LUMINANCE_ATTR(status0, llv);
 832 DEVICE_LUMINANCE_ATTR(status1, hlv);
 833 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 834
 835 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 836                                         const char *buf, size_t count)
 837 {
 838         struct hid_device *hdev = to_hid_device(dev);
 839         struct wacom *wacom = hid_get_drvdata(hdev);
 840         int err;
 841         unsigned len;
 842         u8 xfer_id;
 843
 844         if (hdev->bus == BUS_BLUETOOTH) {
 845                 len = 256;
 846                 xfer_id = WAC_CMD_ICON_BT_XFER;
 847         } else {
 848                 len = 1024;
 849                 xfer_id = WAC_CMD_ICON_XFER;
 850         }
 851
 852         if (count != len)
 853                 return -EINVAL;
 854
 855         mutex_lock(&wacom->lock);
 856
 857         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 858
 859         mutex_unlock(&wacom->lock);
 860
 861         return err < 0 ? err : count;
 862 }
 863
 864 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 865 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 866         struct device_attribute *attr, const char *buf, size_t count)   \
 867 {                                                                       \
 868         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 869 }                                                                       \
 870 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 871                    NULL, wacom_btnimg##BUTTON_ID##_store)
 872
 873 DEVICE_BTNIMG_ATTR(0);
 874 DEVICE_BTNIMG_ATTR(1);
 875 DEVICE_BTNIMG_ATTR(2);
 876 DEVICE_BTNIMG_ATTR(3);
 877 DEVICE_BTNIMG_ATTR(4);
 878 DEVICE_BTNIMG_ATTR(5);
 879 DEVICE_BTNIMG_ATTR(6);
 880 DEVICE_BTNIMG_ATTR(7);
 881
 882 static struct attribute *cintiq_led_attrs[] = {
 883         &dev_attr_status_led0_select.attr,
 884         &dev_attr_status_led1_select.attr,
 885         NULL
 886 };
 887
 888 static struct attribute_group cintiq_led_attr_group = {
 889         .name = "wacom_led",
 890         .attrs = cintiq_led_attrs,
 891 };
 892
 893 static struct attribute *intuos4_led_attrs[] = {
 894         &dev_attr_status0_luminance.attr,
 895         &dev_attr_status1_luminance.attr,
 896         &dev_attr_status_led0_select.attr,
 897         &dev_attr_buttons_luminance.attr,
 898         &dev_attr_button0_rawimg.attr,
 899         &dev_attr_button1_rawimg.attr,
 900         &dev_attr_button2_rawimg.attr,
 901         &dev_attr_button3_rawimg.attr,
 902         &dev_attr_button4_rawimg.attr,
 903         &dev_attr_button5_rawimg.attr,
 904         &dev_attr_button6_rawimg.attr,
 905         &dev_attr_button7_rawimg.attr,
 906         NULL
 907 };
 908
 909 static struct attribute_group intuos4_led_attr_group = {
 910         .name = "wacom_led",
 911         .attrs = intuos4_led_attrs,
 912 };
 913
 914 static struct attribute *intuos5_led_attrs[] = {
 915         &dev_attr_status0_luminance.attr,
 916         &dev_attr_status_led0_select.attr,
 917         NULL
 918 };
 919
 920 static struct attribute_group intuos5_led_attr_group = {
 921         .name = "wacom_led",
 922         .attrs = intuos5_led_attrs,
 923 };
 924
 925 struct wacom_sysfs_group_devres {
 926         struct attribute_group *group;
 927         struct kobject *root;
 928 };
 929
 930 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
 931 {
 932         struct wacom_sysfs_group_devres *devres = res;
 933         struct kobject *kobj = devres->root;
 934
 935         dev_dbg(dev, "%s: dropping reference to %s\n",
 936                 __func__, devres->group->name);
 937         sysfs_remove_group(kobj, devres->group);
 938 }
 939
 940 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
 941                                            struct kobject *root,
 942                                            struct attribute_group *group)
 943 {
 944         struct wacom_sysfs_group_devres *devres;
 945         int error;
 946
 947         devres = devres_alloc(wacom_devm_sysfs_group_release,
 948                               sizeof(struct wacom_sysfs_group_devres),
 949                               GFP_KERNEL);
 950         if (!devres)
 951                 return -ENOMEM;
 952
 953         devres->group = group;
 954         devres->root = root;
 955
 956         error = sysfs_create_group(devres->root, group);
 957         if (error)
 958                 return error;
 959
 960         devres_add(&wacom->hdev->dev, devres);
 961
 962         return 0;
 963 }
 964
 965 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
 966                                          struct attribute_group *group)
 967 {
 968         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
 969                                                group);
 970 }
 971
 972 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
 973 {
 974         struct wacom *wacom = led->wacom;
 975
 976         if (wacom->led.max_hlv)
 977                 return led->hlv * LED_FULL / wacom->led.max_hlv;
 978
 979         if (wacom->led.max_llv)
 980                 return led->llv * LED_FULL / wacom->led.max_llv;
 981
 982         /* device doesn't support brightness tuning */
 983         return LED_FULL;
 984 }
 985
 986 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
 987 {
 988         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
 989         struct wacom *wacom = led->wacom;
 990
 991         if (wacom->led.groups[led->group].select != led->id)
 992                 return LED_OFF;
 993
 994         return wacom_leds_brightness_get(led);
 995 }
 996
 997 static int wacom_led_brightness_set(struct led_classdev *cdev,
 998                                     enum led_brightness brightness)
 999 {
1000         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1001         struct wacom *wacom = led->wacom;
1002         int error;
1003
1004         mutex_lock(&wacom->lock);
1005
1006         if (!wacom->led.groups || (brightness == LED_OFF &&
1007             wacom->led.groups[led->group].select != led->id)) {
1008                 error = 0;
1009                 goto out;
1010         }
1011
1012         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1013         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1014
1015         wacom->led.groups[led->group].select = led->id;
1016
1017         error = wacom_led_control(wacom);
1018
1019 out:
1020         mutex_unlock(&wacom->lock);
1021
1022         return error;
1023 }
1024
1025 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1026                                                enum led_brightness brightness)
1027 {
1028 }
1029
1030 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1031                                   struct wacom_led *led, unsigned int group,
1032                                   unsigned int id, bool read_only)
1033 {
1034         int error;
1035         char *name;
1036
1037         name = devm_kasprintf(dev, GFP_KERNEL,
1038                               "%s::wacom-%d.%d",
1039                               dev_name(dev),
1040                               group,
1041                               id);
1042         if (!name)
1043                 return -ENOMEM;
1044
1045         if (!read_only) {
1046                 led->trigger.name = name;
1047                 error = devm_led_trigger_register(dev, &led->trigger);
1048                 if (error) {
1049                         hid_err(wacom->hdev,
1050                                 "failed to register LED trigger %s: %d\n",
1051                                 led->cdev.name, error);
1052                         return error;
1053                 }
1054         }
1055
1056         led->group = group;
1057         led->id = id;
1058         led->wacom = wacom;
1059         led->llv = wacom->led.llv;
1060         led->hlv = wacom->led.hlv;
1061         led->cdev.name = name;
1062         led->cdev.max_brightness = LED_FULL;
1063         led->cdev.flags = LED_HW_PLUGGABLE;
1064         led->cdev.brightness_get = __wacom_led_brightness_get;
1065         if (!read_only) {
1066                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1067                 led->cdev.default_trigger = led->cdev.name;
1068         } else {
1069                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1070         }
1071
1072         error = devm_led_classdev_register(dev, &led->cdev);
1073         if (error) {
1074                 hid_err(wacom->hdev,
1075                         "failed to register LED %s: %d\n",
1076                         led->cdev.name, error);
1077                 led->cdev.name = NULL;
1078                 return error;
1079         }
1080
1081         return 0;
1082 }
1083
1084 static void wacom_led_groups_release_one(void *data)
1085 {
1086         struct wacom_group_leds *group = data;
1087
1088         devres_release_group(group->dev, group);
1089 }
1090
1091 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1092                                                    struct wacom *wacom,
1093                                                    int group_id, int count,
1094                                                    bool read_only)
1095 {
1096         struct wacom_led *leds;
1097         int i, error;
1098
1099         if (group_id >= wacom->led.count || count <= 0)
1100                 return -EINVAL;
1101
1102         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1103                 return -ENOMEM;
1104
1105         leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1106         if (!leds) {
1107                 error = -ENOMEM;
1108                 goto err;
1109         }
1110
1111         wacom->led.groups[group_id].leds = leds;
1112         wacom->led.groups[group_id].count = count;
1113
1114         for (i = 0; i < count; i++) {
1115                 error = wacom_led_register_one(dev, wacom, &leds[i],
1116                                                group_id, i, read_only);
1117                 if (error)
1118                         goto err;
1119         }
1120
1121         wacom->led.groups[group_id].dev = dev;
1122
1123         devres_close_group(dev, &wacom->led.groups[group_id]);
1124
1125         /*
1126          * There is a bug (?) in devm_led_classdev_register() in which its
1127          * increments the refcount of the parent. If the parent is an input
1128          * device, that means the ref count never reaches 0 when
1129          * devm_input_device_release() gets called.
1130          * This means that the LEDs are still there after disconnect.
1131          * Manually force the release of the group so that the leds are released
1132          * once we are done using them.
1133          */
1134         error = devm_add_action_or_reset(&wacom->hdev->dev,
1135                                          wacom_led_groups_release_one,
1136                                          &wacom->led.groups[group_id]);
1137         if (error)
1138                 return error;
1139
1140         return 0;
1141
1142 err:
1143         devres_release_group(dev, &wacom->led.groups[group_id]);
1144         return error;
1145 }
1146
1147 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1148                                  unsigned int id)
1149 {
1150         struct wacom_group_leds *group;
1151
1152         if (group_id >= wacom->led.count)
1153                 return NULL;
1154
1155         group = &wacom->led.groups[group_id];
1156
1157         if (!group->leds)
1158                 return NULL;
1159
1160         id %= group->count;
1161
1162         return &group->leds[id];
1163 }
1164
1165 /**
1166  * wacom_led_next: gives the next available led with a wacom trigger.
1167  *
1168  * returns the next available struct wacom_led which has its default trigger
1169  * or the current one if none is available.
1170  */
1171 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1172 {
1173         struct wacom_led *next_led;
1174         int group, next;
1175
1176         if (!wacom || !cur)
1177                 return NULL;
1178
1179         group = cur->group;
1180         next = cur->id;
1181
1182         do {
1183                 next_led = wacom_led_find(wacom, group, ++next);
1184                 if (!next_led || next_led == cur)
1185                         return next_led;
1186         } while (next_led->cdev.trigger != &next_led->trigger);
1187
1188         return next_led;
1189 }
1190
1191 static void wacom_led_groups_release(void *data)
1192 {
1193         struct wacom *wacom = data;
1194
1195         wacom->led.groups = NULL;
1196         wacom->led.count = 0;
1197 }
1198
1199 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1200 {
1201         struct device *dev = &wacom->hdev->dev;
1202         struct wacom_group_leds *groups;
1203         int error;
1204
1205         groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1206                               GFP_KERNEL);
1207         if (!groups)
1208                 return -ENOMEM;
1209
1210         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1211         if (error)
1212                 return error;
1213
1214         wacom->led.groups = groups;
1215         wacom->led.count = count;
1216
1217         return 0;
1218 }
1219
1220 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1221                                          int led_per_group, bool read_only)
1222 {
1223         struct device *dev;
1224         int i, error;
1225
1226         if (!wacom->wacom_wac.pad_input)
1227                 return -EINVAL;
1228
1229         dev = &wacom->wacom_wac.pad_input->dev;
1230
1231         error = wacom_led_groups_allocate(wacom, group_count);
1232         if (error)
1233                 return error;
1234
1235         for (i = 0; i < group_count; i++) {
1236                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1237                                                                 led_per_group,
1238                                                                 read_only);
1239                 if (error)
1240                         return error;
1241         }
1242
1243         return 0;
1244 }
1245
1246 static int wacom_initialize_leds(struct wacom *wacom)
1247 {
1248         int error;
1249
1250         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1251                 return 0;
1252
1253         /* Initialize default values */
1254         switch (wacom->wacom_wac.features.type) {
1255         case INTUOS4S:
1256         case INTUOS4:
1257         case INTUOS4WL:
1258         case INTUOS4L:
1259                 wacom->led.llv = 10;
1260                 wacom->led.hlv = 20;
1261                 wacom->led.max_llv = 127;
1262                 wacom->led.max_hlv = 127;
1263                 wacom->led.img_lum = 10;
1264
1265                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1266                 if (error) {
1267                         hid_err(wacom->hdev,
1268                                 "cannot create leds err: %d\n", error);
1269                         return error;
1270                 }
1271
1272                 error = wacom_devm_sysfs_create_group(wacom,
1273                                                       &intuos4_led_attr_group);
1274                 break;
1275
1276         case WACOM_24HD:
1277         case WACOM_21UX2:
1278                 wacom->led.llv = 0;
1279                 wacom->led.hlv = 0;
1280                 wacom->led.img_lum = 0;
1281
1282                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1283                 if (error) {
1284                         hid_err(wacom->hdev,
1285                                 "cannot create leds err: %d\n", error);
1286                         return error;
1287                 }
1288
1289                 error = wacom_devm_sysfs_create_group(wacom,
1290                                                       &cintiq_led_attr_group);
1291                 break;
1292
1293         case INTUOS5S:
1294         case INTUOS5:
1295         case INTUOS5L:
1296         case INTUOSPS:
1297         case INTUOSPM:
1298         case INTUOSPL:
1299                 wacom->led.llv = 32;
1300                 wacom->led.max_llv = 96;
1301
1302                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1303                 if (error) {
1304                         hid_err(wacom->hdev,
1305                                 "cannot create leds err: %d\n", error);
1306                         return error;
1307                 }
1308
1309                 error = wacom_devm_sysfs_create_group(wacom,
1310                                                       &intuos5_led_attr_group);
1311                 break;
1312
1313         case REMOTE:
1314                 wacom->led.llv = 255;
1315                 wacom->led.max_llv = 255;
1316                 error = wacom_led_groups_allocate(wacom, 5);
1317                 if (error) {
1318                         hid_err(wacom->hdev,
1319                                 "cannot create leds err: %d\n", error);
1320                         return error;
1321                 }
1322                 return 0;
1323
1324         default:
1325                 return 0;
1326         }
1327
1328         if (error) {
1329                 hid_err(wacom->hdev,
1330                         "cannot create sysfs group err: %d\n", error);
1331                 return error;
1332         }
1333         wacom_led_control(wacom);
1334
1335         return 0;
1336 }
1337
1338 static enum power_supply_property wacom_battery_props[] = {
1339         POWER_SUPPLY_PROP_PRESENT,
1340         POWER_SUPPLY_PROP_STATUS,
1341         POWER_SUPPLY_PROP_SCOPE,
1342         POWER_SUPPLY_PROP_CAPACITY
1343 };
1344
1345 static enum power_supply_property wacom_ac_props[] = {
1346         POWER_SUPPLY_PROP_PRESENT,
1347         POWER_SUPPLY_PROP_ONLINE,
1348         POWER_SUPPLY_PROP_SCOPE,
1349 };
1350
1351 static int wacom_battery_get_property(struct power_supply *psy,
1352                                       enum power_supply_property psp,
1353                                       union power_supply_propval *val)
1354 {
1355         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1356         int ret = 0;
1357
1358         switch (psp) {
1359                 case POWER_SUPPLY_PROP_PRESENT:
1360                         val->intval = battery->bat_connected;
1361                         break;
1362                 case POWER_SUPPLY_PROP_SCOPE:
1363                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1364                         break;
1365                 case POWER_SUPPLY_PROP_CAPACITY:
1366                         val->intval = battery->battery_capacity;
1367                         break;
1368                 case POWER_SUPPLY_PROP_STATUS:
1369                         if (battery->bat_charging)
1370                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1371                         else if (battery->battery_capacity == 100 &&
1372                                     battery->ps_connected)
1373                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1374                         else if (battery->ps_connected)
1375                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1376                         else
1377                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1378                         break;
1379                 default:
1380                         ret = -EINVAL;
1381                         break;
1382         }
1383
1384         return ret;
1385 }
1386
1387 static int wacom_ac_get_property(struct power_supply *psy,
1388                                 enum power_supply_property psp,
1389                                 union power_supply_propval *val)
1390 {
1391         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1392         int ret = 0;
1393
1394         switch (psp) {
1395         case POWER_SUPPLY_PROP_PRESENT:
1396                 /* fall through */
1397         case POWER_SUPPLY_PROP_ONLINE:
1398                 val->intval = battery->ps_connected;
1399                 break;
1400         case POWER_SUPPLY_PROP_SCOPE:
1401                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1402                 break;
1403         default:
1404                 ret = -EINVAL;
1405                 break;
1406         }
1407         return ret;
1408 }
1409
1410 static int __wacom_initialize_battery(struct wacom *wacom,
1411                                       struct wacom_battery *battery)
1412 {
1413         static atomic_t battery_no = ATOMIC_INIT(0);
1414         struct device *dev = &wacom->hdev->dev;
1415         struct power_supply_config psy_cfg = { .drv_data = battery, };
1416         struct power_supply *ps_bat, *ps_ac;
1417         struct power_supply_desc *bat_desc = &battery->bat_desc;
1418         struct power_supply_desc *ac_desc = &battery->ac_desc;
1419         unsigned long n;
1420         int error;
1421
1422         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1423                 return -ENOMEM;
1424
1425         n = atomic_inc_return(&battery_no) - 1;
1426
1427         bat_desc->properties = wacom_battery_props;
1428         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1429         bat_desc->get_property = wacom_battery_get_property;
1430         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1431         bat_desc->name = battery->bat_name;
1432         bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1433         bat_desc->use_for_apm = 0;
1434
1435         ac_desc->properties = wacom_ac_props;
1436         ac_desc->num_properties = ARRAY_SIZE(wacom_ac_props);
1437         ac_desc->get_property = wacom_ac_get_property;
1438         sprintf(battery->ac_name, "wacom_ac_%ld", n);
1439         ac_desc->name = battery->ac_name;
1440         ac_desc->type = POWER_SUPPLY_TYPE_MAINS;
1441         ac_desc->use_for_apm = 0;
1442
1443         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1444         if (IS_ERR(ps_bat)) {
1445                 error = PTR_ERR(ps_bat);
1446                 goto err;
1447         }
1448
1449         ps_ac = devm_power_supply_register(dev, ac_desc, &psy_cfg);
1450         if (IS_ERR(ps_ac)) {
1451                 error = PTR_ERR(ps_ac);
1452                 goto err;
1453         }
1454
1455         power_supply_powers(ps_bat, &wacom->hdev->dev);
1456         power_supply_powers(ps_ac, &wacom->hdev->dev);
1457
1458         battery->battery = ps_bat;
1459         battery->ac = ps_ac;
1460
1461         devres_close_group(dev, bat_desc);
1462         return 0;
1463
1464 err:
1465         devres_release_group(dev, bat_desc);
1466         return error;
1467 }
1468
1469 static int wacom_initialize_battery(struct wacom *wacom)
1470 {
1471         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1472                 return __wacom_initialize_battery(wacom, &wacom->battery);
1473
1474         return 0;
1475 }
1476
1477 static void wacom_destroy_battery(struct wacom *wacom)
1478 {
1479         if (wacom->battery.battery) {
1480                 devres_release_group(&wacom->hdev->dev,
1481                                      &wacom->battery.bat_desc);
1482                 wacom->battery.battery = NULL;
1483                 wacom->battery.ac = NULL;
1484         }
1485 }
1486
1487 static ssize_t wacom_show_speed(struct device *dev,
1488                                 struct device_attribute
1489                                 *attr, char *buf)
1490 {
1491         struct hid_device *hdev = to_hid_device(dev);
1492         struct wacom *wacom = hid_get_drvdata(hdev);
1493
1494         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1495 }
1496
1497 static ssize_t wacom_store_speed(struct device *dev,
1498                                 struct device_attribute *attr,
1499                                 const char *buf, size_t count)
1500 {
1501         struct hid_device *hdev = to_hid_device(dev);
1502         struct wacom *wacom = hid_get_drvdata(hdev);
1503         u8 new_speed;
1504
1505         if (kstrtou8(buf, 0, &new_speed))
1506                 return -EINVAL;
1507
1508         if (new_speed != 0 && new_speed != 1)
1509                 return -EINVAL;
1510
1511         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1512
1513         return count;
1514 }
1515
1516 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1517                 wacom_show_speed, wacom_store_speed);
1518
1519
1520 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1521                                       struct kobj_attribute *kattr,
1522                                       char *buf, int index)
1523 {
1524         struct device *dev = kobj_to_dev(kobj->parent);
1525         struct hid_device *hdev = to_hid_device(dev);
1526         struct wacom *wacom = hid_get_drvdata(hdev);
1527         u8 mode;
1528
1529         mode = wacom->led.groups[index].select;
1530         if (mode >= 0 && mode < 3)
1531                 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1532         else
1533                 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1534 }
1535
1536 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1537 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1538                                struct kobj_attribute *kattr, char *buf) \
1539 {                                                                       \
1540         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1541 }                                                                       \
1542 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1543         .attr = {.name = "remote_mode",                                 \
1544                 .mode = DEV_ATTR_RO_PERM},                              \
1545         .show = wacom_show_remote##SET_ID##_mode,                       \
1546 };                                                                      \
1547 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1548         &remote##SET_ID##_mode_attr.attr,                               \
1549         NULL                                                            \
1550 };                                                                      \
1551 static struct attribute_group remote##SET_ID##_serial_group = {         \
1552         .name = NULL,                                                   \
1553         .attrs = remote##SET_ID##_serial_attrs,                         \
1554 }
1555
1556 DEVICE_EKR_ATTR_GROUP(0);
1557 DEVICE_EKR_ATTR_GROUP(1);
1558 DEVICE_EKR_ATTR_GROUP(2);
1559 DEVICE_EKR_ATTR_GROUP(3);
1560 DEVICE_EKR_ATTR_GROUP(4);
1561
1562 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1563                                           int index)
1564 {
1565         int error = 0;
1566         struct wacom_remote *remote = wacom->remote;
1567
1568         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1569                                                           GFP_KERNEL,
1570                                                           "%d", serial);
1571         if (!remote->remotes[index].group.name)
1572                 return -ENOMEM;
1573
1574         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1575                                                 &remote->remotes[index].group);
1576         if (error) {
1577                 remote->remotes[index].group.name = NULL;
1578                 hid_err(wacom->hdev,
1579                         "cannot create sysfs group err: %d\n", error);
1580                 return error;
1581         }
1582
1583         return 0;
1584 }
1585
1586 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1587 {
1588         const size_t buf_size = 2;
1589         unsigned char *buf;
1590         int retval;
1591
1592         buf = kzalloc(buf_size, GFP_KERNEL);
1593         if (!buf)
1594                 return -ENOMEM;
1595
1596         buf[0] = WAC_CMD_DELETE_PAIRING;
1597         buf[1] = selector;
1598
1599         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1600                                   buf_size, WAC_CMD_RETRIES);
1601         kfree(buf);
1602
1603         return retval;
1604 }
1605
1606 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1607                                          struct kobj_attribute *attr,
1608                                          const char *buf, size_t count)
1609 {
1610         unsigned char selector = 0;
1611         struct device *dev = kobj_to_dev(kobj->parent);
1612         struct hid_device *hdev = to_hid_device(dev);
1613         struct wacom *wacom = hid_get_drvdata(hdev);
1614         int err;
1615
1616         if (!strncmp(buf, "*\n", 2)) {
1617                 selector = WAC_CMD_UNPAIR_ALL;
1618         } else {
1619                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1620                          buf);
1621                 return -1;
1622         }
1623
1624         mutex_lock(&wacom->lock);
1625
1626         err = wacom_cmd_unpair_remote(wacom, selector);
1627         mutex_unlock(&wacom->lock);
1628
1629         return err < 0 ? err : count;
1630 }
1631
1632 static struct kobj_attribute unpair_remote_attr = {
1633         .attr = {.name = "unpair_remote", .mode = 0200},
1634         .store = wacom_store_unpair_remote,
1635 };
1636
1637 static const struct attribute *remote_unpair_attrs[] = {
1638         &unpair_remote_attr.attr,
1639         NULL
1640 };
1641
1642 static void wacom_remotes_destroy(void *data)
1643 {
1644         struct wacom *wacom = data;
1645         struct wacom_remote *remote = wacom->remote;
1646
1647         if (!remote)
1648                 return;
1649
1650         kobject_put(remote->remote_dir);
1651         kfifo_free(&remote->remote_fifo);
1652         wacom->remote = NULL;
1653 }
1654
1655 static int wacom_initialize_remotes(struct wacom *wacom)
1656 {
1657         int error = 0;
1658         struct wacom_remote *remote;
1659         int i;
1660
1661         if (wacom->wacom_wac.features.type != REMOTE)
1662                 return 0;
1663
1664         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1665                               GFP_KERNEL);
1666         if (!remote)
1667                 return -ENOMEM;
1668
1669         wacom->remote = remote;
1670
1671         spin_lock_init(&remote->remote_lock);
1672
1673         error = kfifo_alloc(&remote->remote_fifo,
1674                         5 * sizeof(struct wacom_remote_data),
1675                         GFP_KERNEL);
1676         if (error) {
1677                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1678                 return -ENOMEM;
1679         }
1680
1681         remote->remotes[0].group = remote0_serial_group;
1682         remote->remotes[1].group = remote1_serial_group;
1683         remote->remotes[2].group = remote2_serial_group;
1684         remote->remotes[3].group = remote3_serial_group;
1685         remote->remotes[4].group = remote4_serial_group;
1686
1687         remote->remote_dir = kobject_create_and_add("wacom_remote",
1688                                                     &wacom->hdev->dev.kobj);
1689         if (!remote->remote_dir)
1690                 return -ENOMEM;
1691
1692         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1693
1694         if (error) {
1695                 hid_err(wacom->hdev,
1696                         "cannot create sysfs group err: %d\n", error);
1697                 return error;
1698         }
1699
1700         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1701                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1702                 remote->remotes[i].serial = 0;
1703         }
1704
1705         error = devm_add_action_or_reset(&wacom->hdev->dev,
1706                                          wacom_remotes_destroy, wacom);
1707         if (error)
1708                 return error;
1709
1710         return 0;
1711 }
1712
1713 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1714 {
1715         struct input_dev *input_dev;
1716         struct hid_device *hdev = wacom->hdev;
1717         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1718
1719         input_dev = devm_input_allocate_device(&hdev->dev);
1720         if (!input_dev)
1721                 return NULL;
1722
1723         input_dev->name = wacom_wac->features.name;
1724         input_dev->phys = hdev->phys;
1725         input_dev->dev.parent = &hdev->dev;
1726         input_dev->open = wacom_open;
1727         input_dev->close = wacom_close;
1728         input_dev->uniq = hdev->uniq;
1729         input_dev->id.bustype = hdev->bus;
1730         input_dev->id.vendor  = hdev->vendor;
1731         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1732         input_dev->id.version = hdev->version;
1733         input_set_drvdata(input_dev, wacom);
1734
1735         return input_dev;
1736 }
1737
1738 static int wacom_allocate_inputs(struct wacom *wacom)
1739 {
1740         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1741
1742         wacom_wac->pen_input = wacom_allocate_input(wacom);
1743         wacom_wac->touch_input = wacom_allocate_input(wacom);
1744         wacom_wac->pad_input = wacom_allocate_input(wacom);
1745         if (!wacom_wac->pen_input ||
1746             !wacom_wac->touch_input ||
1747             !wacom_wac->pad_input)
1748                 return -ENOMEM;
1749
1750         wacom_wac->pen_input->name = wacom_wac->pen_name;
1751         wacom_wac->touch_input->name = wacom_wac->touch_name;
1752         wacom_wac->pad_input->name = wacom_wac->pad_name;
1753
1754         return 0;
1755 }
1756
1757 static int wacom_register_inputs(struct wacom *wacom)
1758 {
1759         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1760         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1761         int error = 0;
1762
1763         pen_input_dev = wacom_wac->pen_input;
1764         touch_input_dev = wacom_wac->touch_input;
1765         pad_input_dev = wacom_wac->pad_input;
1766
1767         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1768                 return -EINVAL;
1769
1770         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1771         if (error) {
1772                 /* no pen in use on this interface */
1773                 input_free_device(pen_input_dev);
1774                 wacom_wac->pen_input = NULL;
1775                 pen_input_dev = NULL;
1776         } else {
1777                 error = input_register_device(pen_input_dev);
1778                 if (error)
1779                         goto fail;
1780         }
1781
1782         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1783         if (error) {
1784                 /* no touch in use on this interface */
1785                 input_free_device(touch_input_dev);
1786                 wacom_wac->touch_input = NULL;
1787                 touch_input_dev = NULL;
1788         } else {
1789                 error = input_register_device(touch_input_dev);
1790                 if (error)
1791                         goto fail;
1792         }
1793
1794         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1795         if (error) {
1796                 /* no pad in use on this interface */
1797                 input_free_device(pad_input_dev);
1798                 wacom_wac->pad_input = NULL;
1799                 pad_input_dev = NULL;
1800         } else {
1801                 error = input_register_device(pad_input_dev);
1802                 if (error)
1803                         goto fail;
1804         }
1805
1806         return 0;
1807
1808 fail:
1809         wacom_wac->pad_input = NULL;
1810         wacom_wac->touch_input = NULL;
1811         wacom_wac->pen_input = NULL;
1812         return error;
1813 }
1814
1815 /*
1816  * Not all devices report physical dimensions from HID.
1817  * Compute the default from hardcoded logical dimension
1818  * and resolution before driver overwrites them.
1819  */
1820 static void wacom_set_default_phy(struct wacom_features *features)
1821 {
1822         if (features->x_resolution) {
1823                 features->x_phy = (features->x_max * 100) /
1824                                         features->x_resolution;
1825                 features->y_phy = (features->y_max * 100) /
1826                                         features->y_resolution;
1827         }
1828 }
1829
1830 static void wacom_calculate_res(struct wacom_features *features)
1831 {
1832         /* set unit to "100th of a mm" for devices not reported by HID */
1833         if (!features->unit) {
1834                 features->unit = 0x11;
1835                 features->unitExpo = -3;
1836         }
1837
1838         features->x_resolution = wacom_calc_hid_res(features->x_max,
1839                                                     features->x_phy,
1840                                                     features->unit,
1841                                                     features->unitExpo);
1842         features->y_resolution = wacom_calc_hid_res(features->y_max,
1843                                                     features->y_phy,
1844                                                     features->unit,
1845                                                     features->unitExpo);
1846 }
1847
1848 void wacom_battery_work(struct work_struct *work)
1849 {
1850         struct wacom *wacom = container_of(work, struct wacom, battery_work);
1851
1852         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1853              !wacom->battery.battery) {
1854                 wacom_initialize_battery(wacom);
1855         }
1856         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1857                  wacom->battery.battery) {
1858                 wacom_destroy_battery(wacom);
1859         }
1860 }
1861
1862 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1863 {
1864         struct hid_report_enum *report_enum;
1865         struct hid_report *report;
1866         size_t size = 0;
1867
1868         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1869
1870         list_for_each_entry(report, &report_enum->report_list, list) {
1871                 size_t report_size = hid_report_len(report);
1872                 if (report_size > size)
1873                         size = report_size;
1874         }
1875
1876         return size;
1877 }
1878
1879 static void wacom_update_name(struct wacom *wacom, const char *suffix)
1880 {
1881         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1882         struct wacom_features *features = &wacom_wac->features;
1883         char name[WACOM_NAME_MAX];
1884
1885         /* Generic devices name unspecified */
1886         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1887                 if (strstr(wacom->hdev->name, "Wacom") ||
1888                     strstr(wacom->hdev->name, "wacom") ||
1889                     strstr(wacom->hdev->name, "WACOM")) {
1890                         /* name is in HID descriptor, use it */
1891                         strlcpy(name, wacom->hdev->name, sizeof(name));
1892
1893                         /* strip out excess whitespaces */
1894                         while (1) {
1895                                 char *gap = strstr(name, "  ");
1896                                 if (gap == NULL)
1897                                         break;
1898                                 /* shift everything including the terminator */
1899                                 memmove(gap, gap+1, strlen(gap));
1900                         }
1901                         /* get rid of trailing whitespace */
1902                         if (name[strlen(name)-1] == ' ')
1903                                 name[strlen(name)-1] = '\0';
1904                 } else {
1905                         /* no meaningful name retrieved. use product ID */
1906                         snprintf(name, sizeof(name),
1907                                  "%s %X", features->name, wacom->hdev->product);
1908                 }
1909         } else {
1910                 strlcpy(name, features->name, sizeof(name));
1911         }
1912
1913         /* Append the device type to the name */
1914         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1915                 "%s%s Pen", name, suffix);
1916         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1917                 "%s%s Finger", name, suffix);
1918         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1919                 "%s%s Pad", name, suffix);
1920 }
1921
1922 static void wacom_release_resources(struct wacom *wacom)
1923 {
1924         struct hid_device *hdev = wacom->hdev;
1925
1926         if (!wacom->resources)
1927                 return;
1928
1929         devres_release_group(&hdev->dev, wacom);
1930
1931         wacom->resources = false;
1932
1933         wacom->wacom_wac.pen_input = NULL;
1934         wacom->wacom_wac.touch_input = NULL;
1935         wacom->wacom_wac.pad_input = NULL;
1936 }
1937
1938 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
1939 {
1940         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1941         struct wacom_features *features = &wacom_wac->features;
1942         struct hid_device *hdev = wacom->hdev;
1943         int error;
1944         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1945
1946         features->pktlen = wacom_compute_pktlen(hdev);
1947         if (features->pktlen > WACOM_PKGLEN_MAX)
1948                 return -EINVAL;
1949
1950         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
1951                 return -ENOMEM;
1952
1953         wacom->resources = true;
1954
1955         error = wacom_allocate_inputs(wacom);
1956         if (error)
1957                 goto fail;
1958
1959         /*
1960          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
1961          * into debug mode for the touch part.
1962          * We ignore the other interfaces.
1963          */
1964         if (features->type == BAMBOO_PAD) {
1965                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
1966                         features->type = HID_GENERIC;
1967                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
1968                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
1969                         error = -ENODEV;
1970                         goto fail;
1971                 }
1972         }
1973
1974         /* set the default size in case we do not get them from hid */
1975         wacom_set_default_phy(features);
1976
1977         /* Retrieve the physical and logical size for touch devices */
1978         wacom_retrieve_hid_descriptor(hdev, features);
1979         wacom_setup_device_quirks(wacom);
1980
1981         if (features->device_type == WACOM_DEVICETYPE_NONE &&
1982             features->type != WIRELESS) {
1983                 error = features->type == HID_GENERIC ? -ENODEV : 0;
1984
1985                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
1986                          hdev->name,
1987                          error ? "Ignoring" : "Assuming pen");
1988
1989                 if (error)
1990                         goto fail;
1991
1992                 features->device_type |= WACOM_DEVICETYPE_PEN;
1993         }
1994
1995         wacom_calculate_res(features);
1996
1997         wacom_update_name(wacom, wireless ? " (WL)" : "");
1998
1999         error = wacom_add_shared_data(hdev);
2000         if (error)
2001                 goto fail;
2002
2003         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2004              (features->quirks & WACOM_QUIRK_BATTERY)) {
2005                 error = wacom_initialize_battery(wacom);
2006                 if (error)
2007                         goto fail;
2008         }
2009
2010         error = wacom_register_inputs(wacom);
2011         if (error)
2012                 goto fail;
2013
2014         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2015                 error = wacom_initialize_leds(wacom);
2016                 if (error)
2017                         goto fail;
2018
2019                 error = wacom_initialize_remotes(wacom);
2020                 if (error)
2021                         goto fail;
2022         }
2023
2024         if (features->type == HID_GENERIC)
2025                 connect_mask |= HID_CONNECT_DRIVER;
2026
2027         /* Regular HID work starts now */
2028         error = hid_hw_start(hdev, connect_mask);
2029         if (error) {
2030                 hid_err(hdev, "hw start failed\n");
2031                 goto fail;
2032         }
2033
2034         if (!wireless) {
2035                 /* Note that if query fails it is not a hard failure */
2036                 wacom_query_tablet_data(hdev, features);
2037         }
2038
2039         /* touch only Bamboo doesn't support pen */
2040         if ((features->type == BAMBOO_TOUCH) &&
2041             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2042                 error = -ENODEV;
2043                 goto fail_quirks;
2044         }
2045
2046         /* pen only Bamboo neither support touch nor pad */
2047         if ((features->type == BAMBOO_PEN) &&
2048             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2049             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2050                 error = -ENODEV;
2051                 goto fail_quirks;
2052         }
2053
2054         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2055                 error = hid_hw_open(hdev);
2056
2057         if ((wacom_wac->features.type == INTUOSHT ||
2058              wacom_wac->features.type == INTUOSHT2) &&
2059             (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
2060                 wacom_wac->shared->type = wacom_wac->features.type;
2061                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2062         }
2063
2064         devres_close_group(&hdev->dev, wacom);
2065
2066         return 0;
2067
2068 fail_quirks:
2069         hid_hw_stop(hdev);
2070 fail:
2071         wacom_release_resources(wacom);
2072         return error;
2073 }
2074
2075 static void wacom_wireless_work(struct work_struct *work)
2076 {
2077         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2078         struct usb_device *usbdev = wacom->usbdev;
2079         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2080         struct hid_device *hdev1, *hdev2;
2081         struct wacom *wacom1, *wacom2;
2082         struct wacom_wac *wacom_wac1, *wacom_wac2;
2083         int error;
2084
2085         /*
2086          * Regardless if this is a disconnect or a new tablet,
2087          * remove any existing input and battery devices.
2088          */
2089
2090         wacom_destroy_battery(wacom);
2091
2092         /* Stylus interface */
2093         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2094         wacom1 = hid_get_drvdata(hdev1);
2095         wacom_wac1 = &(wacom1->wacom_wac);
2096         wacom_release_resources(wacom1);
2097
2098         /* Touch interface */
2099         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2100         wacom2 = hid_get_drvdata(hdev2);
2101         wacom_wac2 = &(wacom2->wacom_wac);
2102         wacom_release_resources(wacom2);
2103
2104         if (wacom_wac->pid == 0) {
2105                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2106         } else {
2107                 const struct hid_device_id *id = wacom_ids;
2108
2109                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2110                          wacom_wac->pid);
2111
2112                 while (id->bus) {
2113                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2114                             id->product == wacom_wac->pid)
2115                                 break;
2116                         id++;
2117                 }
2118
2119                 if (!id->bus) {
2120                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2121                         return;
2122                 }
2123
2124                 /* Stylus interface */
2125                 wacom_wac1->features =
2126                         *((struct wacom_features *)id->driver_data);
2127
2128                 wacom_wac1->pid = wacom_wac->pid;
2129                 hid_hw_stop(hdev1);
2130                 error = wacom_parse_and_register(wacom1, true);
2131                 if (error)
2132                         goto fail;
2133
2134                 /* Touch interface */
2135                 if (wacom_wac1->features.touch_max ||
2136                     (wacom_wac1->features.type >= INTUOSHT &&
2137                     wacom_wac1->features.type <= BAMBOO_PT)) {
2138                         wacom_wac2->features =
2139                                 *((struct wacom_features *)id->driver_data);
2140                         wacom_wac2->pid = wacom_wac->pid;
2141                         hid_hw_stop(hdev2);
2142                         error = wacom_parse_and_register(wacom2, true);
2143                         if (error)
2144                                 goto fail;
2145                 }
2146
2147                 error = wacom_initialize_battery(wacom);
2148                 if (error)
2149                         goto fail;
2150         }
2151
2152         return;
2153
2154 fail:
2155         wacom_release_resources(wacom1);
2156         wacom_release_resources(wacom2);
2157         return;
2158 }
2159
2160 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2161 {
2162         struct wacom_remote *remote = wacom->remote;
2163         u32 serial = remote->remotes[index].serial;
2164         int i;
2165         unsigned long flags;
2166
2167         spin_lock_irqsave(&remote->remote_lock, flags);
2168         remote->remotes[index].registered = false;
2169         spin_unlock_irqrestore(&remote->remote_lock, flags);
2170
2171         if (remote->remotes[index].battery.battery)
2172                 devres_release_group(&wacom->hdev->dev,
2173                                      &remote->remotes[index].battery.bat_desc);
2174
2175         if (remote->remotes[index].group.name)
2176                 devres_release_group(&wacom->hdev->dev,
2177                                      &remote->remotes[index]);
2178
2179         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2180                 if (remote->remotes[i].serial == serial) {
2181                         remote->remotes[i].serial = 0;
2182                         remote->remotes[i].group.name = NULL;
2183                         remote->remotes[i].registered = false;
2184                         remote->remotes[i].battery.battery = NULL;
2185                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2186                 }
2187         }
2188 }
2189
2190 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2191                                    unsigned int index)
2192 {
2193         struct wacom_remote *remote = wacom->remote;
2194         struct device *dev = &wacom->hdev->dev;
2195         int error, k;
2196
2197         /* A remote can pair more than once with an EKR,
2198          * check to make sure this serial isn't already paired.
2199          */
2200         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2201                 if (remote->remotes[k].serial == serial)
2202                         break;
2203         }
2204
2205         if (k < WACOM_MAX_REMOTES) {
2206                 remote->remotes[index].serial = serial;
2207                 return 0;
2208         }
2209
2210         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2211                 return -ENOMEM;
2212
2213         error = wacom_remote_create_attr_group(wacom, serial, index);
2214         if (error)
2215                 goto fail;
2216
2217         remote->remotes[index].input = wacom_allocate_input(wacom);
2218         if (!remote->remotes[index].input) {
2219                 error = -ENOMEM;
2220                 goto fail;
2221         }
2222         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2223         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2224
2225         if (!remote->remotes[index].input->name) {
2226                 error = -EINVAL;
2227                 goto fail;
2228         }
2229
2230         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2231                                                    &wacom->wacom_wac);
2232         if (error)
2233                 goto fail;
2234
2235         remote->remotes[index].serial = serial;
2236
2237         error = input_register_device(remote->remotes[index].input);
2238         if (error)
2239                 goto fail;
2240
2241         error = wacom_led_groups_alloc_and_register_one(
2242                                         &remote->remotes[index].input->dev,
2243                                         wacom, index, 3, true);
2244         if (error)
2245                 goto fail;
2246
2247         remote->remotes[index].registered = true;
2248
2249         devres_close_group(dev, &remote->remotes[index]);
2250         return 0;
2251
2252 fail:
2253         devres_release_group(dev, &remote->remotes[index]);
2254         remote->remotes[index].serial = 0;
2255         return error;
2256 }
2257
2258 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2259 {
2260         struct wacom_remote *remote = wacom->remote;
2261         int error;
2262
2263         if (!remote->remotes[index].registered)
2264                 return 0;
2265
2266         if (remote->remotes[index].battery.battery)
2267                 return 0;
2268
2269         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2270                 return 0;
2271
2272         error = __wacom_initialize_battery(wacom,
2273                                         &wacom->remote->remotes[index].battery);
2274         if (error)
2275                 return error;
2276
2277         return 0;
2278 }
2279
2280 static void wacom_remote_work(struct work_struct *work)
2281 {
2282         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2283         struct wacom_remote *remote = wacom->remote;
2284         struct wacom_remote_data data;
2285         unsigned long flags;
2286         unsigned int count;
2287         u32 serial;
2288         int i;
2289
2290         spin_lock_irqsave(&remote->remote_lock, flags);
2291
2292         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2293
2294         if (count != sizeof(data)) {
2295                 hid_err(wacom->hdev,
2296                         "workitem triggered without status available\n");
2297                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2298                 return;
2299         }
2300
2301         if (!kfifo_is_empty(&remote->remote_fifo))
2302                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2303
2304         spin_unlock_irqrestore(&remote->remote_lock, flags);
2305
2306         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2307                 serial = data.remote[i].serial;
2308                 if (data.remote[i].connected) {
2309
2310                         if (remote->remotes[i].serial == serial) {
2311                                 wacom_remote_attach_battery(wacom, i);
2312                                 continue;
2313                         }
2314
2315                         if (remote->remotes[i].serial)
2316                                 wacom_remote_destroy_one(wacom, i);
2317
2318                         wacom_remote_create_one(wacom, serial, i);
2319
2320                 } else if (remote->remotes[i].serial) {
2321                         wacom_remote_destroy_one(wacom, i);
2322                 }
2323         }
2324 }
2325
2326 static int wacom_probe(struct hid_device *hdev,
2327                 const struct hid_device_id *id)
2328 {
2329         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2330         struct usb_device *dev = interface_to_usbdev(intf);
2331         struct wacom *wacom;
2332         struct wacom_wac *wacom_wac;
2333         struct wacom_features *features;
2334         int error;
2335
2336         if (!id->driver_data)
2337                 return -EINVAL;
2338
2339         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2340
2341         /* hid-core sets this quirk for the boot interface */
2342         hdev->quirks &= ~HID_QUIRK_NOGET;
2343
2344         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2345         if (!wacom)
2346                 return -ENOMEM;
2347
2348         hid_set_drvdata(hdev, wacom);
2349         wacom->hdev = hdev;
2350
2351         wacom_wac = &wacom->wacom_wac;
2352         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2353         features = &wacom_wac->features;
2354
2355         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2356                 error = -ENODEV;
2357                 goto fail;
2358         }
2359
2360         wacom_wac->hid_data.inputmode = -1;
2361         wacom_wac->mode_report = -1;
2362
2363         wacom->usbdev = dev;
2364         wacom->intf = intf;
2365         mutex_init(&wacom->lock);
2366         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2367         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2368         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2369
2370         /* ask for the report descriptor to be loaded by HID */
2371         error = hid_parse(hdev);
2372         if (error) {
2373                 hid_err(hdev, "parse failed\n");
2374                 goto fail;
2375         }
2376
2377         error = wacom_parse_and_register(wacom, false);
2378         if (error)
2379                 goto fail;
2380
2381         if (hdev->bus == BUS_BLUETOOTH) {
2382                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2383                 if (error)
2384                         hid_warn(hdev,
2385                                  "can't create sysfs speed attribute err: %d\n",
2386                                  error);
2387         }
2388
2389         return 0;
2390
2391 fail:
2392         hid_set_drvdata(hdev, NULL);
2393         return error;
2394 }
2395
2396 static void wacom_remove(struct hid_device *hdev)
2397 {
2398         struct wacom *wacom = hid_get_drvdata(hdev);
2399         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2400         struct wacom_features *features = &wacom_wac->features;
2401
2402         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2403                 hid_hw_close(hdev);
2404
2405         hid_hw_stop(hdev);
2406
2407         cancel_work_sync(&wacom->wireless_work);
2408         cancel_work_sync(&wacom->battery_work);
2409         cancel_work_sync(&wacom->remote_work);
2410         if (hdev->bus == BUS_BLUETOOTH)
2411                 device_remove_file(&hdev->dev, &dev_attr_speed);
2412
2413         hid_set_drvdata(hdev, NULL);
2414 }
2415
2416 #ifdef CONFIG_PM
2417 static int wacom_resume(struct hid_device *hdev)
2418 {
2419         struct wacom *wacom = hid_get_drvdata(hdev);
2420         struct wacom_features *features = &wacom->wacom_wac.features;
2421
2422         mutex_lock(&wacom->lock);
2423
2424         /* switch to wacom mode first */
2425         wacom_query_tablet_data(hdev, features);
2426         wacom_led_control(wacom);
2427
2428         mutex_unlock(&wacom->lock);
2429
2430         return 0;
2431 }
2432
2433 static int wacom_reset_resume(struct hid_device *hdev)
2434 {
2435         return wacom_resume(hdev);
2436 }
2437 #endif /* CONFIG_PM */
2438
2439 static struct hid_driver wacom_driver = {
2440         .name =         "wacom",
2441         .id_table =     wacom_ids,
2442         .probe =        wacom_probe,
2443         .remove =       wacom_remove,
2444         .report =       wacom_wac_report,
2445 #ifdef CONFIG_PM
2446         .resume =       wacom_resume,
2447         .reset_resume = wacom_reset_resume,
2448 #endif
2449         .raw_event =    wacom_raw_event,
2450 };
2451 module_hid_driver(wacom_driver);
2452
2453 MODULE_VERSION(DRIVER_VERSION);
2454 MODULE_AUTHOR(DRIVER_AUTHOR);
2455 MODULE_DESCRIPTION(DRIVER_DESC);
2456 MODULE_LICENSE(DRIVER_LICENSE);