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         u32 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 && intf) {
 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 compare_device_paths(struct hid_device *hdev_a,
 531                 struct hid_device *hdev_b, char separator)
 532 {
 533         int n1 = strrchr(hdev_a->phys, separator) - hdev_a->phys;
 534         int n2 = strrchr(hdev_b->phys, separator) - hdev_b->phys;
 535
 536         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 537                 return false;
 538
 539         return !strncmp(hdev_a->phys, hdev_b->phys, n1);
 540 }
 541
 542 static bool wacom_are_sibling(struct hid_device *hdev,
 543                 struct hid_device *sibling)
 544 {
 545         struct wacom *wacom = hid_get_drvdata(hdev);
 546         struct wacom_features *features = &wacom->wacom_wac.features;
 547         struct wacom *sibling_wacom = hid_get_drvdata(sibling);
 548         struct wacom_features *sibling_features = &sibling_wacom->wacom_wac.features;
 549         __u32 oVid = features->oVid ? features->oVid : hdev->vendor;
 550         __u32 oPid = features->oPid ? features->oPid : hdev->product;
 551
 552         /* The defined oVid/oPid must match that of the sibling */
 553         if (features->oVid != HID_ANY_ID && sibling->vendor != oVid)
 554                 return false;
 555         if (features->oPid != HID_ANY_ID && sibling->product != oPid)
 556                 return false;
 557
 558         /*
 559          * Devices with the same VID/PID must share the same physical
 560          * device path, while those with different VID/PID must share
 561          * the same physical parent device path.
 562          */
 563         if (hdev->vendor == sibling->vendor && hdev->product == sibling->product) {
 564                 if (!compare_device_paths(hdev, sibling, '/'))
 565                         return false;
 566         } else {
 567                 if (!compare_device_paths(hdev, sibling, '.'))
 568                         return false;
 569         }
 570
 571         /* Skip the remaining heuristics unless you are a HID_GENERIC device */
 572         if (features->type != HID_GENERIC)
 573                 return true;
 574
 575         /*
 576          * Direct-input devices may not be siblings of indirect-input
 577          * devices.
 578          */
 579         if ((features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 580             !(sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 581                 return false;
 582
 583         /*
 584          * Indirect-input devices may not be siblings of direct-input
 585          * devices.
 586          */
 587         if (!(features->device_type & WACOM_DEVICETYPE_DIRECT) &&
 588             (sibling_features->device_type & WACOM_DEVICETYPE_DIRECT))
 589                 return false;
 590
 591         /* Pen devices may only be siblings of touch devices */
 592         if ((features->device_type & WACOM_DEVICETYPE_PEN) &&
 593             !(sibling_features->device_type & WACOM_DEVICETYPE_TOUCH))
 594                 return false;
 595
 596         /* Touch devices may only be siblings of pen devices */
 597         if ((features->device_type & WACOM_DEVICETYPE_TOUCH) &&
 598             !(sibling_features->device_type & WACOM_DEVICETYPE_PEN))
 599                 return false;
 600
 601         /*
 602          * No reason could be found for these two devices to NOT be
 603          * siblings, so there's a good chance they ARE siblings
 604          */
 605         return true;
 606 }
 607
 608 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 609 {
 610         struct wacom_hdev_data *data;
 611
 612         /* Try to find an already-probed interface from the same device */
 613         list_for_each_entry(data, &wacom_udev_list, list) {
 614                 if (compare_device_paths(hdev, data->dev, '/')) {
 615                         kref_get(&data->kref);
 616                         return data;
 617                 }
 618         }
 619
 620         /* Fallback to finding devices that appear to be "siblings" */
 621         list_for_each_entry(data, &wacom_udev_list, list) {
 622                 if (wacom_are_sibling(hdev, data->dev)) {
 623                         kref_get(&data->kref);
 624                         return data;
 625                 }
 626         }
 627
 628         return NULL;
 629 }
 630
 631 static void wacom_release_shared_data(struct kref *kref)
 632 {
 633         struct wacom_hdev_data *data =
 634                 container_of(kref, struct wacom_hdev_data, kref);
 635
 636         mutex_lock(&wacom_udev_list_lock);
 637         list_del(&data->list);
 638         mutex_unlock(&wacom_udev_list_lock);
 639
 640         kfree(data);
 641 }
 642
 643 static void wacom_remove_shared_data(void *res)
 644 {
 645         struct wacom *wacom = res;
 646         struct wacom_hdev_data *data;
 647         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 648
 649         if (wacom_wac->shared) {
 650                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 651                                     shared);
 652
 653                 if (wacom_wac->shared->touch == wacom->hdev)
 654                         wacom_wac->shared->touch = NULL;
 655                 else if (wacom_wac->shared->pen == wacom->hdev)
 656                         wacom_wac->shared->pen = NULL;
 657
 658                 kref_put(&data->kref, wacom_release_shared_data);
 659                 wacom_wac->shared = NULL;
 660         }
 661 }
 662
 663 static int wacom_add_shared_data(struct hid_device *hdev)
 664 {
 665         struct wacom *wacom = hid_get_drvdata(hdev);
 666         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 667         struct wacom_hdev_data *data;
 668         int retval = 0;
 669
 670         mutex_lock(&wacom_udev_list_lock);
 671
 672         data = wacom_get_hdev_data(hdev);
 673         if (!data) {
 674                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 675                 if (!data) {
 676                         retval = -ENOMEM;
 677                         goto out;
 678                 }
 679
 680                 kref_init(&data->kref);
 681                 data->dev = hdev;
 682                 list_add_tail(&data->list, &wacom_udev_list);
 683         }
 684
 685         wacom_wac->shared = &data->shared;
 686
 687         retval = devm_add_action(&hdev->dev, wacom_remove_shared_data, wacom);
 688         if (retval) {
 689                 mutex_unlock(&wacom_udev_list_lock);
 690                 wacom_remove_shared_data(wacom);
 691                 return retval;
 692         }
 693
 694         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 695                 wacom_wac->shared->touch = hdev;
 696         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 697                 wacom_wac->shared->pen = hdev;
 698
 699 out:
 700         mutex_unlock(&wacom_udev_list_lock);
 701         return retval;
 702 }
 703
 704 static int wacom_led_control(struct wacom *wacom)
 705 {
 706         unsigned char *buf;
 707         int retval;
 708         unsigned char report_id = WAC_CMD_LED_CONTROL;
 709         int buf_size = 9;
 710
 711         if (!hid_get_drvdata(wacom->hdev))
 712                 return -ENODEV;
 713
 714         if (!wacom->led.groups)
 715                 return -ENOTSUPP;
 716
 717         if (wacom->wacom_wac.features.type == REMOTE)
 718                 return -ENOTSUPP;
 719
 720         if (wacom->wacom_wac.pid) { /* wireless connected */
 721                 report_id = WAC_CMD_WL_LED_CONTROL;
 722                 buf_size = 13;
 723         }
 724         buf = kzalloc(buf_size, GFP_KERNEL);
 725         if (!buf)
 726                 return -ENOMEM;
 727
 728         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 729             wacom->wacom_wac.features.type <= INTUOSPL) {
 730                 /*
 731                  * Touch Ring and crop mark LED luminance may take on
 732                  * one of four values:
 733                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 734                  */
 735                 int ring_led = wacom->led.groups[0].select & 0x03;
 736                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 737                 int crop_lum = 0;
 738                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 739
 740                 buf[0] = report_id;
 741                 if (wacom->wacom_wac.pid) {
 742                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 743                                          buf, buf_size, WAC_CMD_RETRIES);
 744                         buf[0] = report_id;
 745                         buf[4] = led_bits;
 746                 } else
 747                         buf[1] = led_bits;
 748         }
 749         else {
 750                 int led = wacom->led.groups[0].select | 0x4;
 751
 752                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 753                     wacom->wacom_wac.features.type == WACOM_24HD)
 754                         led |= (wacom->led.groups[1].select << 4) | 0x40;
 755
 756                 buf[0] = report_id;
 757                 buf[1] = led;
 758                 buf[2] = wacom->led.llv;
 759                 buf[3] = wacom->led.hlv;
 760                 buf[4] = wacom->led.img_lum;
 761         }
 762
 763         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 764                                   WAC_CMD_RETRIES);
 765         kfree(buf);
 766
 767         return retval;
 768 }
 769
 770 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 771                 const unsigned len, const void *img)
 772 {
 773         unsigned char *buf;
 774         int i, retval;
 775         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 776
 777         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 778         if (!buf)
 779                 return -ENOMEM;
 780
 781         /* Send 'start' command */
 782         buf[0] = WAC_CMD_ICON_START;
 783         buf[1] = 1;
 784         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 785                                   WAC_CMD_RETRIES);
 786         if (retval < 0)
 787                 goto out;
 788
 789         buf[0] = xfer_id;
 790         buf[1] = button_id & 0x07;
 791         for (i = 0; i < 4; i++) {
 792                 buf[2] = i;
 793                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 794
 795                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 796                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 797                 if (retval < 0)
 798                         break;
 799         }
 800
 801         /* Send 'stop' */
 802         buf[0] = WAC_CMD_ICON_START;
 803         buf[1] = 0;
 804         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 805                          WAC_CMD_RETRIES);
 806
 807 out:
 808         kfree(buf);
 809         return retval;
 810 }
 811
 812 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 813                                       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         unsigned int id;
 818         int err;
 819
 820         err = kstrtouint(buf, 10, &id);
 821         if (err)
 822                 return err;
 823
 824         mutex_lock(&wacom->lock);
 825
 826         wacom->led.groups[set_id].select = id & 0x3;
 827         err = wacom_led_control(wacom);
 828
 829         mutex_unlock(&wacom->lock);
 830
 831         return err < 0 ? err : count;
 832 }
 833
 834 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 835 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 836         struct device_attribute *attr, const char *buf, size_t count)   \
 837 {                                                                       \
 838         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 839 }                                                                       \
 840 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 841         struct device_attribute *attr, char *buf)                       \
 842 {                                                                       \
 843         struct hid_device *hdev = to_hid_device(dev);\
 844         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 845         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 846                          wacom->led.groups[SET_ID].select);             \
 847 }                                                                       \
 848 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 849                     wacom_led##SET_ID##_select_show,                    \
 850                     wacom_led##SET_ID##_select_store)
 851
 852 DEVICE_LED_SELECT_ATTR(0);
 853 DEVICE_LED_SELECT_ATTR(1);
 854
 855 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 856                                      const char *buf, size_t count)
 857 {
 858         unsigned int value;
 859         int err;
 860
 861         err = kstrtouint(buf, 10, &value);
 862         if (err)
 863                 return err;
 864
 865         mutex_lock(&wacom->lock);
 866
 867         *dest = value & 0x7f;
 868         err = wacom_led_control(wacom);
 869
 870         mutex_unlock(&wacom->lock);
 871
 872         return err < 0 ? err : count;
 873 }
 874
 875 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 876 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 877         struct device_attribute *attr, const char *buf, size_t count)   \
 878 {                                                                       \
 879         struct hid_device *hdev = to_hid_device(dev);\
 880         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 881                                                                         \
 882         return wacom_luminance_store(wacom, &wacom->led.field,          \
 883                                      buf, count);                       \
 884 }                                                                       \
 885 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 886         struct device_attribute *attr, char *buf)                       \
 887 {                                                                       \
 888         struct wacom *wacom = dev_get_drvdata(dev);                     \
 889         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 890 }                                                                       \
 891 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 892                    wacom_##name##_luminance_show,                       \
 893                    wacom_##name##_luminance_store)
 894
 895 DEVICE_LUMINANCE_ATTR(status0, llv);
 896 DEVICE_LUMINANCE_ATTR(status1, hlv);
 897 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 898
 899 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 900                                         const char *buf, size_t count)
 901 {
 902         struct hid_device *hdev = to_hid_device(dev);
 903         struct wacom *wacom = hid_get_drvdata(hdev);
 904         int err;
 905         unsigned len;
 906         u8 xfer_id;
 907
 908         if (hdev->bus == BUS_BLUETOOTH) {
 909                 len = 256;
 910                 xfer_id = WAC_CMD_ICON_BT_XFER;
 911         } else {
 912                 len = 1024;
 913                 xfer_id = WAC_CMD_ICON_XFER;
 914         }
 915
 916         if (count != len)
 917                 return -EINVAL;
 918
 919         mutex_lock(&wacom->lock);
 920
 921         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 922
 923         mutex_unlock(&wacom->lock);
 924
 925         return err < 0 ? err : count;
 926 }
 927
 928 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 929 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 930         struct device_attribute *attr, const char *buf, size_t count)   \
 931 {                                                                       \
 932         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 933 }                                                                       \
 934 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 935                    NULL, wacom_btnimg##BUTTON_ID##_store)
 936
 937 DEVICE_BTNIMG_ATTR(0);
 938 DEVICE_BTNIMG_ATTR(1);
 939 DEVICE_BTNIMG_ATTR(2);
 940 DEVICE_BTNIMG_ATTR(3);
 941 DEVICE_BTNIMG_ATTR(4);
 942 DEVICE_BTNIMG_ATTR(5);
 943 DEVICE_BTNIMG_ATTR(6);
 944 DEVICE_BTNIMG_ATTR(7);
 945
 946 static struct attribute *cintiq_led_attrs[] = {
 947         &dev_attr_status_led0_select.attr,
 948         &dev_attr_status_led1_select.attr,
 949         NULL
 950 };
 951
 952 static struct attribute_group cintiq_led_attr_group = {
 953         .name = "wacom_led",
 954         .attrs = cintiq_led_attrs,
 955 };
 956
 957 static struct attribute *intuos4_led_attrs[] = {
 958         &dev_attr_status0_luminance.attr,
 959         &dev_attr_status1_luminance.attr,
 960         &dev_attr_status_led0_select.attr,
 961         &dev_attr_buttons_luminance.attr,
 962         &dev_attr_button0_rawimg.attr,
 963         &dev_attr_button1_rawimg.attr,
 964         &dev_attr_button2_rawimg.attr,
 965         &dev_attr_button3_rawimg.attr,
 966         &dev_attr_button4_rawimg.attr,
 967         &dev_attr_button5_rawimg.attr,
 968         &dev_attr_button6_rawimg.attr,
 969         &dev_attr_button7_rawimg.attr,
 970         NULL
 971 };
 972
 973 static struct attribute_group intuos4_led_attr_group = {
 974         .name = "wacom_led",
 975         .attrs = intuos4_led_attrs,
 976 };
 977
 978 static struct attribute *intuos5_led_attrs[] = {
 979         &dev_attr_status0_luminance.attr,
 980         &dev_attr_status_led0_select.attr,
 981         NULL
 982 };
 983
 984 static struct attribute_group intuos5_led_attr_group = {
 985         .name = "wacom_led",
 986         .attrs = intuos5_led_attrs,
 987 };
 988
 989 struct wacom_sysfs_group_devres {
 990         struct attribute_group *group;
 991         struct kobject *root;
 992 };
 993
 994 static void wacom_devm_sysfs_group_release(struct device *dev, void *res)
 995 {
 996         struct wacom_sysfs_group_devres *devres = res;
 997         struct kobject *kobj = devres->root;
 998
 999         dev_dbg(dev, "%s: dropping reference to %s\n",
1000                 __func__, devres->group->name);
1001         sysfs_remove_group(kobj, devres->group);
1002 }
1003
1004 static int __wacom_devm_sysfs_create_group(struct wacom *wacom,
1005                                            struct kobject *root,
1006                                            struct attribute_group *group)
1007 {
1008         struct wacom_sysfs_group_devres *devres;
1009         int error;
1010
1011         devres = devres_alloc(wacom_devm_sysfs_group_release,
1012                               sizeof(struct wacom_sysfs_group_devres),
1013                               GFP_KERNEL);
1014         if (!devres)
1015                 return -ENOMEM;
1016
1017         devres->group = group;
1018         devres->root = root;
1019
1020         error = sysfs_create_group(devres->root, group);
1021         if (error)
1022                 return error;
1023
1024         devres_add(&wacom->hdev->dev, devres);
1025
1026         return 0;
1027 }
1028
1029 static int wacom_devm_sysfs_create_group(struct wacom *wacom,
1030                                          struct attribute_group *group)
1031 {
1032         return __wacom_devm_sysfs_create_group(wacom, &wacom->hdev->dev.kobj,
1033                                                group);
1034 }
1035
1036 enum led_brightness wacom_leds_brightness_get(struct wacom_led *led)
1037 {
1038         struct wacom *wacom = led->wacom;
1039
1040         if (wacom->led.max_hlv)
1041                 return led->hlv * LED_FULL / wacom->led.max_hlv;
1042
1043         if (wacom->led.max_llv)
1044                 return led->llv * LED_FULL / wacom->led.max_llv;
1045
1046         /* device doesn't support brightness tuning */
1047         return LED_FULL;
1048 }
1049
1050 static enum led_brightness __wacom_led_brightness_get(struct led_classdev *cdev)
1051 {
1052         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1053         struct wacom *wacom = led->wacom;
1054
1055         if (wacom->led.groups[led->group].select != led->id)
1056                 return LED_OFF;
1057
1058         return wacom_leds_brightness_get(led);
1059 }
1060
1061 static int wacom_led_brightness_set(struct led_classdev *cdev,
1062                                     enum led_brightness brightness)
1063 {
1064         struct wacom_led *led = container_of(cdev, struct wacom_led, cdev);
1065         struct wacom *wacom = led->wacom;
1066         int error;
1067
1068         mutex_lock(&wacom->lock);
1069
1070         if (!wacom->led.groups || (brightness == LED_OFF &&
1071             wacom->led.groups[led->group].select != led->id)) {
1072                 error = 0;
1073                 goto out;
1074         }
1075
1076         led->llv = wacom->led.llv = wacom->led.max_llv * brightness / LED_FULL;
1077         led->hlv = wacom->led.hlv = wacom->led.max_hlv * brightness / LED_FULL;
1078
1079         wacom->led.groups[led->group].select = led->id;
1080
1081         error = wacom_led_control(wacom);
1082
1083 out:
1084         mutex_unlock(&wacom->lock);
1085
1086         return error;
1087 }
1088
1089 static void wacom_led_readonly_brightness_set(struct led_classdev *cdev,
1090                                                enum led_brightness brightness)
1091 {
1092 }
1093
1094 static int wacom_led_register_one(struct device *dev, struct wacom *wacom,
1095                                   struct wacom_led *led, unsigned int group,
1096                                   unsigned int id, bool read_only)
1097 {
1098         int error;
1099         char *name;
1100
1101         name = devm_kasprintf(dev, GFP_KERNEL,
1102                               "%s::wacom-%d.%d",
1103                               dev_name(dev),
1104                               group,
1105                               id);
1106         if (!name)
1107                 return -ENOMEM;
1108
1109         if (!read_only) {
1110                 led->trigger.name = name;
1111                 error = devm_led_trigger_register(dev, &led->trigger);
1112                 if (error) {
1113                         hid_err(wacom->hdev,
1114                                 "failed to register LED trigger %s: %d\n",
1115                                 led->cdev.name, error);
1116                         return error;
1117                 }
1118         }
1119
1120         led->group = group;
1121         led->id = id;
1122         led->wacom = wacom;
1123         led->llv = wacom->led.llv;
1124         led->hlv = wacom->led.hlv;
1125         led->cdev.name = name;
1126         led->cdev.max_brightness = LED_FULL;
1127         led->cdev.flags = LED_HW_PLUGGABLE;
1128         led->cdev.brightness_get = __wacom_led_brightness_get;
1129         if (!read_only) {
1130                 led->cdev.brightness_set_blocking = wacom_led_brightness_set;
1131                 led->cdev.default_trigger = led->cdev.name;
1132         } else {
1133                 led->cdev.brightness_set = wacom_led_readonly_brightness_set;
1134         }
1135
1136         error = devm_led_classdev_register(dev, &led->cdev);
1137         if (error) {
1138                 hid_err(wacom->hdev,
1139                         "failed to register LED %s: %d\n",
1140                         led->cdev.name, error);
1141                 led->cdev.name = NULL;
1142                 return error;
1143         }
1144
1145         return 0;
1146 }
1147
1148 static void wacom_led_groups_release_one(void *data)
1149 {
1150         struct wacom_group_leds *group = data;
1151
1152         devres_release_group(group->dev, group);
1153 }
1154
1155 static int wacom_led_groups_alloc_and_register_one(struct device *dev,
1156                                                    struct wacom *wacom,
1157                                                    int group_id, int count,
1158                                                    bool read_only)
1159 {
1160         struct wacom_led *leds;
1161         int i, error;
1162
1163         if (group_id >= wacom->led.count || count <= 0)
1164                 return -EINVAL;
1165
1166         if (!devres_open_group(dev, &wacom->led.groups[group_id], GFP_KERNEL))
1167                 return -ENOMEM;
1168
1169         leds = devm_kzalloc(dev, sizeof(struct wacom_led) * count, GFP_KERNEL);
1170         if (!leds) {
1171                 error = -ENOMEM;
1172                 goto err;
1173         }
1174
1175         wacom->led.groups[group_id].leds = leds;
1176         wacom->led.groups[group_id].count = count;
1177
1178         for (i = 0; i < count; i++) {
1179                 error = wacom_led_register_one(dev, wacom, &leds[i],
1180                                                group_id, i, read_only);
1181                 if (error)
1182                         goto err;
1183         }
1184
1185         wacom->led.groups[group_id].dev = dev;
1186
1187         devres_close_group(dev, &wacom->led.groups[group_id]);
1188
1189         /*
1190          * There is a bug (?) in devm_led_classdev_register() in which its
1191          * increments the refcount of the parent. If the parent is an input
1192          * device, that means the ref count never reaches 0 when
1193          * devm_input_device_release() gets called.
1194          * This means that the LEDs are still there after disconnect.
1195          * Manually force the release of the group so that the leds are released
1196          * once we are done using them.
1197          */
1198         error = devm_add_action_or_reset(&wacom->hdev->dev,
1199                                          wacom_led_groups_release_one,
1200                                          &wacom->led.groups[group_id]);
1201         if (error)
1202                 return error;
1203
1204         return 0;
1205
1206 err:
1207         devres_release_group(dev, &wacom->led.groups[group_id]);
1208         return error;
1209 }
1210
1211 struct wacom_led *wacom_led_find(struct wacom *wacom, unsigned int group_id,
1212                                  unsigned int id)
1213 {
1214         struct wacom_group_leds *group;
1215
1216         if (group_id >= wacom->led.count)
1217                 return NULL;
1218
1219         group = &wacom->led.groups[group_id];
1220
1221         if (!group->leds)
1222                 return NULL;
1223
1224         id %= group->count;
1225
1226         return &group->leds[id];
1227 }
1228
1229 /**
1230  * wacom_led_next: gives the next available led with a wacom trigger.
1231  *
1232  * returns the next available struct wacom_led which has its default trigger
1233  * or the current one if none is available.
1234  */
1235 struct wacom_led *wacom_led_next(struct wacom *wacom, struct wacom_led *cur)
1236 {
1237         struct wacom_led *next_led;
1238         int group, next;
1239
1240         if (!wacom || !cur)
1241                 return NULL;
1242
1243         group = cur->group;
1244         next = cur->id;
1245
1246         do {
1247                 next_led = wacom_led_find(wacom, group, ++next);
1248                 if (!next_led || next_led == cur)
1249                         return next_led;
1250         } while (next_led->cdev.trigger != &next_led->trigger);
1251
1252         return next_led;
1253 }
1254
1255 static void wacom_led_groups_release(void *data)
1256 {
1257         struct wacom *wacom = data;
1258
1259         wacom->led.groups = NULL;
1260         wacom->led.count = 0;
1261 }
1262
1263 static int wacom_led_groups_allocate(struct wacom *wacom, int count)
1264 {
1265         struct device *dev = &wacom->hdev->dev;
1266         struct wacom_group_leds *groups;
1267         int error;
1268
1269         groups = devm_kzalloc(dev, sizeof(struct wacom_group_leds) * count,
1270                               GFP_KERNEL);
1271         if (!groups)
1272                 return -ENOMEM;
1273
1274         error = devm_add_action_or_reset(dev, wacom_led_groups_release, wacom);
1275         if (error)
1276                 return error;
1277
1278         wacom->led.groups = groups;
1279         wacom->led.count = count;
1280
1281         return 0;
1282 }
1283
1284 static int wacom_leds_alloc_and_register(struct wacom *wacom, int group_count,
1285                                          int led_per_group, bool read_only)
1286 {
1287         struct device *dev;
1288         int i, error;
1289
1290         if (!wacom->wacom_wac.pad_input)
1291                 return -EINVAL;
1292
1293         dev = &wacom->wacom_wac.pad_input->dev;
1294
1295         error = wacom_led_groups_allocate(wacom, group_count);
1296         if (error)
1297                 return error;
1298
1299         for (i = 0; i < group_count; i++) {
1300                 error = wacom_led_groups_alloc_and_register_one(dev, wacom, i,
1301                                                                 led_per_group,
1302                                                                 read_only);
1303                 if (error)
1304                         return error;
1305         }
1306
1307         return 0;
1308 }
1309
1310 static int wacom_initialize_leds(struct wacom *wacom)
1311 {
1312         int error;
1313
1314         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
1315                 return 0;
1316
1317         /* Initialize default values */
1318         switch (wacom->wacom_wac.features.type) {
1319         case INTUOS4S:
1320         case INTUOS4:
1321         case INTUOS4WL:
1322         case INTUOS4L:
1323                 wacom->led.llv = 10;
1324                 wacom->led.hlv = 20;
1325                 wacom->led.max_llv = 127;
1326                 wacom->led.max_hlv = 127;
1327                 wacom->led.img_lum = 10;
1328
1329                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1330                 if (error) {
1331                         hid_err(wacom->hdev,
1332                                 "cannot create leds err: %d\n", error);
1333                         return error;
1334                 }
1335
1336                 error = wacom_devm_sysfs_create_group(wacom,
1337                                                       &intuos4_led_attr_group);
1338                 break;
1339
1340         case WACOM_24HD:
1341         case WACOM_21UX2:
1342                 wacom->led.llv = 0;
1343                 wacom->led.hlv = 0;
1344                 wacom->led.img_lum = 0;
1345
1346                 error = wacom_leds_alloc_and_register(wacom, 2, 4, false);
1347                 if (error) {
1348                         hid_err(wacom->hdev,
1349                                 "cannot create leds err: %d\n", error);
1350                         return error;
1351                 }
1352
1353                 error = wacom_devm_sysfs_create_group(wacom,
1354                                                       &cintiq_led_attr_group);
1355                 break;
1356
1357         case INTUOS5S:
1358         case INTUOS5:
1359         case INTUOS5L:
1360         case INTUOSPS:
1361         case INTUOSPM:
1362         case INTUOSPL:
1363                 wacom->led.llv = 32;
1364                 wacom->led.max_llv = 96;
1365
1366                 error = wacom_leds_alloc_and_register(wacom, 1, 4, false);
1367                 if (error) {
1368                         hid_err(wacom->hdev,
1369                                 "cannot create leds err: %d\n", error);
1370                         return error;
1371                 }
1372
1373                 error = wacom_devm_sysfs_create_group(wacom,
1374                                                       &intuos5_led_attr_group);
1375                 break;
1376
1377         case REMOTE:
1378                 wacom->led.llv = 255;
1379                 wacom->led.max_llv = 255;
1380                 error = wacom_led_groups_allocate(wacom, 5);
1381                 if (error) {
1382                         hid_err(wacom->hdev,
1383                                 "cannot create leds err: %d\n", error);
1384                         return error;
1385                 }
1386                 return 0;
1387
1388         default:
1389                 return 0;
1390         }
1391
1392         if (error) {
1393                 hid_err(wacom->hdev,
1394                         "cannot create sysfs group err: %d\n", error);
1395                 return error;
1396         }
1397         wacom_led_control(wacom);
1398
1399         return 0;
1400 }
1401
1402 static enum power_supply_property wacom_battery_props[] = {
1403         POWER_SUPPLY_PROP_MODEL_NAME,
1404         POWER_SUPPLY_PROP_PRESENT,
1405         POWER_SUPPLY_PROP_STATUS,
1406         POWER_SUPPLY_PROP_SCOPE,
1407         POWER_SUPPLY_PROP_CAPACITY
1408 };
1409
1410 static int wacom_battery_get_property(struct power_supply *psy,
1411                                       enum power_supply_property psp,
1412                                       union power_supply_propval *val)
1413 {
1414         struct wacom_battery *battery = power_supply_get_drvdata(psy);
1415         int ret = 0;
1416
1417         switch (psp) {
1418                 case POWER_SUPPLY_PROP_MODEL_NAME:
1419                         val->strval = battery->wacom->wacom_wac.name;
1420                         break;
1421                 case POWER_SUPPLY_PROP_PRESENT:
1422                         val->intval = battery->bat_connected;
1423                         break;
1424                 case POWER_SUPPLY_PROP_SCOPE:
1425                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1426                         break;
1427                 case POWER_SUPPLY_PROP_CAPACITY:
1428                         val->intval = battery->battery_capacity;
1429                         break;
1430                 case POWER_SUPPLY_PROP_STATUS:
1431                         if (battery->bat_charging)
1432                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
1433                         else if (battery->battery_capacity == 100 &&
1434                                     battery->ps_connected)
1435                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1436                         else if (battery->ps_connected)
1437                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1438                         else
1439                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1440                         break;
1441                 default:
1442                         ret = -EINVAL;
1443                         break;
1444         }
1445
1446         return ret;
1447 }
1448
1449 static int __wacom_initialize_battery(struct wacom *wacom,
1450                                       struct wacom_battery *battery)
1451 {
1452         static atomic_t battery_no = ATOMIC_INIT(0);
1453         struct device *dev = &wacom->hdev->dev;
1454         struct power_supply_config psy_cfg = { .drv_data = battery, };
1455         struct power_supply *ps_bat;
1456         struct power_supply_desc *bat_desc = &battery->bat_desc;
1457         unsigned long n;
1458         int error;
1459
1460         if (!devres_open_group(dev, bat_desc, GFP_KERNEL))
1461                 return -ENOMEM;
1462
1463         battery->wacom = wacom;
1464
1465         n = atomic_inc_return(&battery_no) - 1;
1466
1467         bat_desc->properties = wacom_battery_props;
1468         bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1469         bat_desc->get_property = wacom_battery_get_property;
1470         sprintf(battery->bat_name, "wacom_battery_%ld", n);
1471         bat_desc->name = battery->bat_name;
1472         bat_desc->type = POWER_SUPPLY_TYPE_USB;
1473         bat_desc->use_for_apm = 0;
1474
1475         ps_bat = devm_power_supply_register(dev, bat_desc, &psy_cfg);
1476         if (IS_ERR(ps_bat)) {
1477                 error = PTR_ERR(ps_bat);
1478                 goto err;
1479         }
1480
1481         power_supply_powers(ps_bat, &wacom->hdev->dev);
1482
1483         battery->battery = ps_bat;
1484
1485         devres_close_group(dev, bat_desc);
1486         return 0;
1487
1488 err:
1489         devres_release_group(dev, bat_desc);
1490         return error;
1491 }
1492
1493 static int wacom_initialize_battery(struct wacom *wacom)
1494 {
1495         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY)
1496                 return __wacom_initialize_battery(wacom, &wacom->battery);
1497
1498         return 0;
1499 }
1500
1501 static void wacom_destroy_battery(struct wacom *wacom)
1502 {
1503         if (wacom->battery.battery) {
1504                 devres_release_group(&wacom->hdev->dev,
1505                                      &wacom->battery.bat_desc);
1506                 wacom->battery.battery = NULL;
1507         }
1508 }
1509
1510 static ssize_t wacom_show_speed(struct device *dev,
1511                                 struct device_attribute
1512                                 *attr, char *buf)
1513 {
1514         struct hid_device *hdev = to_hid_device(dev);
1515         struct wacom *wacom = hid_get_drvdata(hdev);
1516
1517         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1518 }
1519
1520 static ssize_t wacom_store_speed(struct device *dev,
1521                                 struct device_attribute *attr,
1522                                 const char *buf, size_t count)
1523 {
1524         struct hid_device *hdev = to_hid_device(dev);
1525         struct wacom *wacom = hid_get_drvdata(hdev);
1526         u8 new_speed;
1527
1528         if (kstrtou8(buf, 0, &new_speed))
1529                 return -EINVAL;
1530
1531         if (new_speed != 0 && new_speed != 1)
1532                 return -EINVAL;
1533
1534         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1535
1536         return count;
1537 }
1538
1539 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1540                 wacom_show_speed, wacom_store_speed);
1541
1542
1543 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1544                                       struct kobj_attribute *kattr,
1545                                       char *buf, int index)
1546 {
1547         struct device *dev = kobj_to_dev(kobj->parent);
1548         struct hid_device *hdev = to_hid_device(dev);
1549         struct wacom *wacom = hid_get_drvdata(hdev);
1550         u8 mode;
1551
1552         mode = wacom->led.groups[index].select;
1553         if (mode >= 0 && mode < 3)
1554                 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1555         else
1556                 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1557 }
1558
1559 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1560 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1561                                struct kobj_attribute *kattr, char *buf) \
1562 {                                                                       \
1563         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1564 }                                                                       \
1565 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1566         .attr = {.name = "remote_mode",                                 \
1567                 .mode = DEV_ATTR_RO_PERM},                              \
1568         .show = wacom_show_remote##SET_ID##_mode,                       \
1569 };                                                                      \
1570 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1571         &remote##SET_ID##_mode_attr.attr,                               \
1572         NULL                                                            \
1573 };                                                                      \
1574 static struct attribute_group remote##SET_ID##_serial_group = {         \
1575         .name = NULL,                                                   \
1576         .attrs = remote##SET_ID##_serial_attrs,                         \
1577 }
1578
1579 DEVICE_EKR_ATTR_GROUP(0);
1580 DEVICE_EKR_ATTR_GROUP(1);
1581 DEVICE_EKR_ATTR_GROUP(2);
1582 DEVICE_EKR_ATTR_GROUP(3);
1583 DEVICE_EKR_ATTR_GROUP(4);
1584
1585 static int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial,
1586                                           int index)
1587 {
1588         int error = 0;
1589         struct wacom_remote *remote = wacom->remote;
1590
1591         remote->remotes[index].group.name = devm_kasprintf(&wacom->hdev->dev,
1592                                                           GFP_KERNEL,
1593                                                           "%d", serial);
1594         if (!remote->remotes[index].group.name)
1595                 return -ENOMEM;
1596
1597         error = __wacom_devm_sysfs_create_group(wacom, remote->remote_dir,
1598                                                 &remote->remotes[index].group);
1599         if (error) {
1600                 remote->remotes[index].group.name = NULL;
1601                 hid_err(wacom->hdev,
1602                         "cannot create sysfs group err: %d\n", error);
1603                 return error;
1604         }
1605
1606         return 0;
1607 }
1608
1609 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1610 {
1611         const size_t buf_size = 2;
1612         unsigned char *buf;
1613         int retval;
1614
1615         buf = kzalloc(buf_size, GFP_KERNEL);
1616         if (!buf)
1617                 return -ENOMEM;
1618
1619         buf[0] = WAC_CMD_DELETE_PAIRING;
1620         buf[1] = selector;
1621
1622         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1623                                   buf_size, WAC_CMD_RETRIES);
1624         kfree(buf);
1625
1626         return retval;
1627 }
1628
1629 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1630                                          struct kobj_attribute *attr,
1631                                          const char *buf, size_t count)
1632 {
1633         unsigned char selector = 0;
1634         struct device *dev = kobj_to_dev(kobj->parent);
1635         struct hid_device *hdev = to_hid_device(dev);
1636         struct wacom *wacom = hid_get_drvdata(hdev);
1637         int err;
1638
1639         if (!strncmp(buf, "*\n", 2)) {
1640                 selector = WAC_CMD_UNPAIR_ALL;
1641         } else {
1642                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1643                          buf);
1644                 return -1;
1645         }
1646
1647         mutex_lock(&wacom->lock);
1648
1649         err = wacom_cmd_unpair_remote(wacom, selector);
1650         mutex_unlock(&wacom->lock);
1651
1652         return err < 0 ? err : count;
1653 }
1654
1655 static struct kobj_attribute unpair_remote_attr = {
1656         .attr = {.name = "unpair_remote", .mode = 0200},
1657         .store = wacom_store_unpair_remote,
1658 };
1659
1660 static const struct attribute *remote_unpair_attrs[] = {
1661         &unpair_remote_attr.attr,
1662         NULL
1663 };
1664
1665 static void wacom_remotes_destroy(void *data)
1666 {
1667         struct wacom *wacom = data;
1668         struct wacom_remote *remote = wacom->remote;
1669
1670         if (!remote)
1671                 return;
1672
1673         kobject_put(remote->remote_dir);
1674         kfifo_free(&remote->remote_fifo);
1675         wacom->remote = NULL;
1676 }
1677
1678 static int wacom_initialize_remotes(struct wacom *wacom)
1679 {
1680         int error = 0;
1681         struct wacom_remote *remote;
1682         int i;
1683
1684         if (wacom->wacom_wac.features.type != REMOTE)
1685                 return 0;
1686
1687         remote = devm_kzalloc(&wacom->hdev->dev, sizeof(*wacom->remote),
1688                               GFP_KERNEL);
1689         if (!remote)
1690                 return -ENOMEM;
1691
1692         wacom->remote = remote;
1693
1694         spin_lock_init(&remote->remote_lock);
1695
1696         error = kfifo_alloc(&remote->remote_fifo,
1697                         5 * sizeof(struct wacom_remote_data),
1698                         GFP_KERNEL);
1699         if (error) {
1700                 hid_err(wacom->hdev, "failed allocating remote_fifo\n");
1701                 return -ENOMEM;
1702         }
1703
1704         remote->remotes[0].group = remote0_serial_group;
1705         remote->remotes[1].group = remote1_serial_group;
1706         remote->remotes[2].group = remote2_serial_group;
1707         remote->remotes[3].group = remote3_serial_group;
1708         remote->remotes[4].group = remote4_serial_group;
1709
1710         remote->remote_dir = kobject_create_and_add("wacom_remote",
1711                                                     &wacom->hdev->dev.kobj);
1712         if (!remote->remote_dir)
1713                 return -ENOMEM;
1714
1715         error = sysfs_create_files(remote->remote_dir, remote_unpair_attrs);
1716
1717         if (error) {
1718                 hid_err(wacom->hdev,
1719                         "cannot create sysfs group err: %d\n", error);
1720                 return error;
1721         }
1722
1723         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1724                 wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
1725                 remote->remotes[i].serial = 0;
1726         }
1727
1728         error = devm_add_action_or_reset(&wacom->hdev->dev,
1729                                          wacom_remotes_destroy, wacom);
1730         if (error)
1731                 return error;
1732
1733         return 0;
1734 }
1735
1736 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1737 {
1738         struct input_dev *input_dev;
1739         struct hid_device *hdev = wacom->hdev;
1740         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1741
1742         input_dev = devm_input_allocate_device(&hdev->dev);
1743         if (!input_dev)
1744                 return NULL;
1745
1746         input_dev->name = wacom_wac->features.name;
1747         input_dev->phys = hdev->phys;
1748         input_dev->dev.parent = &hdev->dev;
1749         input_dev->open = wacom_open;
1750         input_dev->close = wacom_close;
1751         input_dev->uniq = hdev->uniq;
1752         input_dev->id.bustype = hdev->bus;
1753         input_dev->id.vendor  = hdev->vendor;
1754         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1755         input_dev->id.version = hdev->version;
1756         input_set_drvdata(input_dev, wacom);
1757
1758         return input_dev;
1759 }
1760
1761 static int wacom_allocate_inputs(struct wacom *wacom)
1762 {
1763         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1764
1765         wacom_wac->pen_input = wacom_allocate_input(wacom);
1766         wacom_wac->touch_input = wacom_allocate_input(wacom);
1767         wacom_wac->pad_input = wacom_allocate_input(wacom);
1768         if (!wacom_wac->pen_input ||
1769             !wacom_wac->touch_input ||
1770             !wacom_wac->pad_input)
1771                 return -ENOMEM;
1772
1773         wacom_wac->pen_input->name = wacom_wac->pen_name;
1774         wacom_wac->touch_input->name = wacom_wac->touch_name;
1775         wacom_wac->pad_input->name = wacom_wac->pad_name;
1776
1777         return 0;
1778 }
1779
1780 static int wacom_register_inputs(struct wacom *wacom)
1781 {
1782         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1783         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1784         int error = 0;
1785
1786         pen_input_dev = wacom_wac->pen_input;
1787         touch_input_dev = wacom_wac->touch_input;
1788         pad_input_dev = wacom_wac->pad_input;
1789
1790         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1791                 return -EINVAL;
1792
1793         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1794         if (error) {
1795                 /* no pen in use on this interface */
1796                 input_free_device(pen_input_dev);
1797                 wacom_wac->pen_input = NULL;
1798                 pen_input_dev = NULL;
1799         } else {
1800                 error = input_register_device(pen_input_dev);
1801                 if (error)
1802                         goto fail;
1803         }
1804
1805         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1806         if (error) {
1807                 /* no touch in use on this interface */
1808                 input_free_device(touch_input_dev);
1809                 wacom_wac->touch_input = NULL;
1810                 touch_input_dev = NULL;
1811         } else {
1812                 error = input_register_device(touch_input_dev);
1813                 if (error)
1814                         goto fail;
1815         }
1816
1817         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1818         if (error) {
1819                 /* no pad in use on this interface */
1820                 input_free_device(pad_input_dev);
1821                 wacom_wac->pad_input = NULL;
1822                 pad_input_dev = NULL;
1823         } else {
1824                 error = input_register_device(pad_input_dev);
1825                 if (error)
1826                         goto fail;
1827         }
1828
1829         return 0;
1830
1831 fail:
1832         wacom_wac->pad_input = NULL;
1833         wacom_wac->touch_input = NULL;
1834         wacom_wac->pen_input = NULL;
1835         return error;
1836 }
1837
1838 /*
1839  * Not all devices report physical dimensions from HID.
1840  * Compute the default from hardcoded logical dimension
1841  * and resolution before driver overwrites them.
1842  */
1843 static void wacom_set_default_phy(struct wacom_features *features)
1844 {
1845         if (features->x_resolution) {
1846                 features->x_phy = (features->x_max * 100) /
1847                                         features->x_resolution;
1848                 features->y_phy = (features->y_max * 100) /
1849                                         features->y_resolution;
1850         }
1851 }
1852
1853 static void wacom_calculate_res(struct wacom_features *features)
1854 {
1855         /* set unit to "100th of a mm" for devices not reported by HID */
1856         if (!features->unit) {
1857                 features->unit = 0x11;
1858                 features->unitExpo = -3;
1859         }
1860
1861         features->x_resolution = wacom_calc_hid_res(features->x_max,
1862                                                     features->x_phy,
1863                                                     features->unit,
1864                                                     features->unitExpo);
1865         features->y_resolution = wacom_calc_hid_res(features->y_max,
1866                                                     features->y_phy,
1867                                                     features->unit,
1868                                                     features->unitExpo);
1869 }
1870
1871 void wacom_battery_work(struct work_struct *work)
1872 {
1873         struct wacom *wacom = container_of(work, struct wacom, battery_work);
1874
1875         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1876              !wacom->battery.battery) {
1877                 wacom_initialize_battery(wacom);
1878         }
1879         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1880                  wacom->battery.battery) {
1881                 wacom_destroy_battery(wacom);
1882         }
1883 }
1884
1885 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1886 {
1887         struct hid_report_enum *report_enum;
1888         struct hid_report *report;
1889         size_t size = 0;
1890
1891         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1892
1893         list_for_each_entry(report, &report_enum->report_list, list) {
1894                 size_t report_size = hid_report_len(report);
1895                 if (report_size > size)
1896                         size = report_size;
1897         }
1898
1899         return size;
1900 }
1901
1902 static void wacom_update_name(struct wacom *wacom, const char *suffix)
1903 {
1904         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1905         struct wacom_features *features = &wacom_wac->features;
1906         char name[WACOM_NAME_MAX];
1907
1908         /* Generic devices name unspecified */
1909         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1910                 if (strstr(wacom->hdev->name, "Wacom") ||
1911                     strstr(wacom->hdev->name, "wacom") ||
1912                     strstr(wacom->hdev->name, "WACOM")) {
1913                         /* name is in HID descriptor, use it */
1914                         strlcpy(name, wacom->hdev->name, sizeof(name));
1915
1916                         /* strip out excess whitespaces */
1917                         while (1) {
1918                                 char *gap = strstr(name, "  ");
1919                                 if (gap == NULL)
1920                                         break;
1921                                 /* shift everything including the terminator */
1922                                 memmove(gap, gap+1, strlen(gap));
1923                         }
1924                         /* get rid of trailing whitespace */
1925                         if (name[strlen(name)-1] == ' ')
1926                                 name[strlen(name)-1] = '\0';
1927                 } else {
1928                         /* no meaningful name retrieved. use product ID */
1929                         snprintf(name, sizeof(name),
1930                                  "%s %X", features->name, wacom->hdev->product);
1931                 }
1932         } else {
1933                 strlcpy(name, features->name, sizeof(name));
1934         }
1935
1936         snprintf(wacom_wac->name, sizeof(wacom_wac->name), "%s%s",
1937                  name, suffix);
1938
1939         /* Append the device type to the name */
1940         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1941                 "%s%s Pen", name, suffix);
1942         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1943                 "%s%s Finger", name, suffix);
1944         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1945                 "%s%s Pad", name, suffix);
1946 }
1947
1948 static void wacom_release_resources(struct wacom *wacom)
1949 {
1950         struct hid_device *hdev = wacom->hdev;
1951
1952         if (!wacom->resources)
1953                 return;
1954
1955         devres_release_group(&hdev->dev, wacom);
1956
1957         wacom->resources = false;
1958
1959         wacom->wacom_wac.pen_input = NULL;
1960         wacom->wacom_wac.touch_input = NULL;
1961         wacom->wacom_wac.pad_input = NULL;
1962 }
1963
1964 static int wacom_parse_and_register(struct wacom *wacom, bool wireless)
1965 {
1966         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1967         struct wacom_features *features = &wacom_wac->features;
1968         struct hid_device *hdev = wacom->hdev;
1969         int error;
1970         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1971
1972         features->pktlen = wacom_compute_pktlen(hdev);
1973         if (features->pktlen > WACOM_PKGLEN_MAX)
1974                 return -EINVAL;
1975
1976         if (!devres_open_group(&hdev->dev, wacom, GFP_KERNEL))
1977                 return -ENOMEM;
1978
1979         wacom->resources = true;
1980
1981         error = wacom_allocate_inputs(wacom);
1982         if (error)
1983                 goto fail;
1984
1985         /*
1986          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
1987          * into debug mode for the touch part.
1988          * We ignore the other interfaces.
1989          */
1990         if (features->type == BAMBOO_PAD) {
1991                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
1992                         features->type = HID_GENERIC;
1993                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
1994                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
1995                         error = -ENODEV;
1996                         goto fail;
1997                 }
1998         }
1999
2000         /* set the default size in case we do not get them from hid */
2001         wacom_set_default_phy(features);
2002
2003         /* Retrieve the physical and logical size for touch devices */
2004         wacom_retrieve_hid_descriptor(hdev, features);
2005         wacom_setup_device_quirks(wacom);
2006
2007         if (features->device_type == WACOM_DEVICETYPE_NONE &&
2008             features->type != WIRELESS) {
2009                 error = features->type == HID_GENERIC ? -ENODEV : 0;
2010
2011                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
2012                          hdev->name,
2013                          error ? "Ignoring" : "Assuming pen");
2014
2015                 if (error)
2016                         goto fail;
2017
2018                 features->device_type |= WACOM_DEVICETYPE_PEN;
2019         }
2020
2021         wacom_calculate_res(features);
2022
2023         wacom_update_name(wacom, wireless ? " (WL)" : "");
2024
2025         /* pen only Bamboo neither support touch nor pad */
2026         if ((features->type == BAMBOO_PEN) &&
2027             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
2028             (features->device_type & WACOM_DEVICETYPE_PAD))) {
2029                 error = -ENODEV;
2030                 goto fail;
2031         }
2032
2033         error = wacom_add_shared_data(hdev);
2034         if (error)
2035                 goto fail;
2036
2037         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
2038              (features->quirks & WACOM_QUIRK_BATTERY)) {
2039                 error = wacom_initialize_battery(wacom);
2040                 if (error)
2041                         goto fail;
2042         }
2043
2044         error = wacom_register_inputs(wacom);
2045         if (error)
2046                 goto fail;
2047
2048         if (wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD) {
2049                 error = wacom_initialize_leds(wacom);
2050                 if (error)
2051                         goto fail;
2052
2053                 error = wacom_initialize_remotes(wacom);
2054                 if (error)
2055                         goto fail;
2056         }
2057
2058         if (features->type == HID_GENERIC)
2059                 connect_mask |= HID_CONNECT_DRIVER;
2060
2061         /* Regular HID work starts now */
2062         error = hid_hw_start(hdev, connect_mask);
2063         if (error) {
2064                 hid_err(hdev, "hw start failed\n");
2065                 goto fail;
2066         }
2067
2068         if (!wireless) {
2069                 /* Note that if query fails it is not a hard failure */
2070                 wacom_query_tablet_data(hdev, features);
2071         }
2072
2073         /* touch only Bamboo doesn't support pen */
2074         if ((features->type == BAMBOO_TOUCH) &&
2075             (features->device_type & WACOM_DEVICETYPE_PEN)) {
2076                 error = -ENODEV;
2077                 goto fail_quirks;
2078         }
2079
2080         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2081                 error = hid_hw_open(hdev);
2082
2083         if ((wacom_wac->features.type == INTUOSHT ||
2084              wacom_wac->features.type == INTUOSHT2) &&
2085             (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
2086                 wacom_wac->shared->type = wacom_wac->features.type;
2087                 wacom_wac->shared->touch_input = wacom_wac->touch_input;
2088         }
2089
2090         devres_close_group(&hdev->dev, wacom);
2091
2092         return 0;
2093
2094 fail_quirks:
2095         hid_hw_stop(hdev);
2096 fail:
2097         wacom_release_resources(wacom);
2098         return error;
2099 }
2100
2101 static void wacom_wireless_work(struct work_struct *work)
2102 {
2103         struct wacom *wacom = container_of(work, struct wacom, wireless_work);
2104         struct usb_device *usbdev = wacom->usbdev;
2105         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2106         struct hid_device *hdev1, *hdev2;
2107         struct wacom *wacom1, *wacom2;
2108         struct wacom_wac *wacom_wac1, *wacom_wac2;
2109         int error;
2110
2111         /*
2112          * Regardless if this is a disconnect or a new tablet,
2113          * remove any existing input and battery devices.
2114          */
2115
2116         wacom_destroy_battery(wacom);
2117
2118         if (!usbdev)
2119                 return;
2120
2121         /* Stylus interface */
2122         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
2123         wacom1 = hid_get_drvdata(hdev1);
2124         wacom_wac1 = &(wacom1->wacom_wac);
2125         wacom_release_resources(wacom1);
2126
2127         /* Touch interface */
2128         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
2129         wacom2 = hid_get_drvdata(hdev2);
2130         wacom_wac2 = &(wacom2->wacom_wac);
2131         wacom_release_resources(wacom2);
2132
2133         if (wacom_wac->pid == 0) {
2134                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
2135         } else {
2136                 const struct hid_device_id *id = wacom_ids;
2137
2138                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
2139                          wacom_wac->pid);
2140
2141                 while (id->bus) {
2142                         if (id->vendor == USB_VENDOR_ID_WACOM &&
2143                             id->product == wacom_wac->pid)
2144                                 break;
2145                         id++;
2146                 }
2147
2148                 if (!id->bus) {
2149                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
2150                         return;
2151                 }
2152
2153                 /* Stylus interface */
2154                 wacom_wac1->features =
2155                         *((struct wacom_features *)id->driver_data);
2156
2157                 wacom_wac1->pid = wacom_wac->pid;
2158                 hid_hw_stop(hdev1);
2159                 error = wacom_parse_and_register(wacom1, true);
2160                 if (error)
2161                         goto fail;
2162
2163                 /* Touch interface */
2164                 if (wacom_wac1->features.touch_max ||
2165                     (wacom_wac1->features.type >= INTUOSHT &&
2166                     wacom_wac1->features.type <= BAMBOO_PT)) {
2167                         wacom_wac2->features =
2168                                 *((struct wacom_features *)id->driver_data);
2169                         wacom_wac2->pid = wacom_wac->pid;
2170                         hid_hw_stop(hdev2);
2171                         error = wacom_parse_and_register(wacom2, true);
2172                         if (error)
2173                                 goto fail;
2174                 }
2175
2176                 strlcpy(wacom_wac->name, wacom_wac1->name,
2177                         sizeof(wacom_wac->name));
2178                 error = wacom_initialize_battery(wacom);
2179                 if (error)
2180                         goto fail;
2181         }
2182
2183         return;
2184
2185 fail:
2186         wacom_release_resources(wacom1);
2187         wacom_release_resources(wacom2);
2188         return;
2189 }
2190
2191 static void wacom_remote_destroy_one(struct wacom *wacom, unsigned int index)
2192 {
2193         struct wacom_remote *remote = wacom->remote;
2194         u32 serial = remote->remotes[index].serial;
2195         int i;
2196         unsigned long flags;
2197
2198         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2199                 if (remote->remotes[i].serial == serial) {
2200
2201                         spin_lock_irqsave(&remote->remote_lock, flags);
2202                         remote->remotes[i].registered = false;
2203                         spin_unlock_irqrestore(&remote->remote_lock, flags);
2204
2205                         if (remote->remotes[i].battery.battery)
2206                                 devres_release_group(&wacom->hdev->dev,
2207                                                      &remote->remotes[i].battery.bat_desc);
2208
2209                         if (remote->remotes[i].group.name)
2210                                 devres_release_group(&wacom->hdev->dev,
2211                                                      &remote->remotes[i]);
2212
2213                         remote->remotes[i].serial = 0;
2214                         remote->remotes[i].group.name = NULL;
2215                         remote->remotes[i].battery.battery = NULL;
2216                         wacom->led.groups[i].select = WACOM_STATUS_UNKNOWN;
2217                 }
2218         }
2219 }
2220
2221 static int wacom_remote_create_one(struct wacom *wacom, u32 serial,
2222                                    unsigned int index)
2223 {
2224         struct wacom_remote *remote = wacom->remote;
2225         struct device *dev = &wacom->hdev->dev;
2226         int error, k;
2227
2228         /* A remote can pair more than once with an EKR,
2229          * check to make sure this serial isn't already paired.
2230          */
2231         for (k = 0; k < WACOM_MAX_REMOTES; k++) {
2232                 if (remote->remotes[k].serial == serial)
2233                         break;
2234         }
2235
2236         if (k < WACOM_MAX_REMOTES) {
2237                 remote->remotes[index].serial = serial;
2238                 return 0;
2239         }
2240
2241         if (!devres_open_group(dev, &remote->remotes[index], GFP_KERNEL))
2242                 return -ENOMEM;
2243
2244         error = wacom_remote_create_attr_group(wacom, serial, index);
2245         if (error)
2246                 goto fail;
2247
2248         remote->remotes[index].input = wacom_allocate_input(wacom);
2249         if (!remote->remotes[index].input) {
2250                 error = -ENOMEM;
2251                 goto fail;
2252         }
2253         remote->remotes[index].input->uniq = remote->remotes[index].group.name;
2254         remote->remotes[index].input->name = wacom->wacom_wac.pad_name;
2255
2256         if (!remote->remotes[index].input->name) {
2257                 error = -EINVAL;
2258                 goto fail;
2259         }
2260
2261         error = wacom_setup_pad_input_capabilities(remote->remotes[index].input,
2262                                                    &wacom->wacom_wac);
2263         if (error)
2264                 goto fail;
2265
2266         remote->remotes[index].serial = serial;
2267
2268         error = input_register_device(remote->remotes[index].input);
2269         if (error)
2270                 goto fail;
2271
2272         error = wacom_led_groups_alloc_and_register_one(
2273                                         &remote->remotes[index].input->dev,
2274                                         wacom, index, 3, true);
2275         if (error)
2276                 goto fail;
2277
2278         remote->remotes[index].registered = true;
2279
2280         devres_close_group(dev, &remote->remotes[index]);
2281         return 0;
2282
2283 fail:
2284         devres_release_group(dev, &remote->remotes[index]);
2285         remote->remotes[index].serial = 0;
2286         return error;
2287 }
2288
2289 static int wacom_remote_attach_battery(struct wacom *wacom, int index)
2290 {
2291         struct wacom_remote *remote = wacom->remote;
2292         int error;
2293
2294         if (!remote->remotes[index].registered)
2295                 return 0;
2296
2297         if (remote->remotes[index].battery.battery)
2298                 return 0;
2299
2300         if (wacom->led.groups[index].select == WACOM_STATUS_UNKNOWN)
2301                 return 0;
2302
2303         error = __wacom_initialize_battery(wacom,
2304                                         &wacom->remote->remotes[index].battery);
2305         if (error)
2306                 return error;
2307
2308         return 0;
2309 }
2310
2311 static void wacom_remote_work(struct work_struct *work)
2312 {
2313         struct wacom *wacom = container_of(work, struct wacom, remote_work);
2314         struct wacom_remote *remote = wacom->remote;
2315         struct wacom_remote_data data;
2316         unsigned long flags;
2317         unsigned int count;
2318         u32 serial;
2319         int i;
2320
2321         spin_lock_irqsave(&remote->remote_lock, flags);
2322
2323         count = kfifo_out(&remote->remote_fifo, &data, sizeof(data));
2324
2325         if (count != sizeof(data)) {
2326                 hid_err(wacom->hdev,
2327                         "workitem triggered without status available\n");
2328                 spin_unlock_irqrestore(&remote->remote_lock, flags);
2329                 return;
2330         }
2331
2332         if (!kfifo_is_empty(&remote->remote_fifo))
2333                 wacom_schedule_work(&wacom->wacom_wac, WACOM_WORKER_REMOTE);
2334
2335         spin_unlock_irqrestore(&remote->remote_lock, flags);
2336
2337         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
2338                 serial = data.remote[i].serial;
2339                 if (data.remote[i].connected) {
2340
2341                         if (remote->remotes[i].serial == serial) {
2342                                 wacom_remote_attach_battery(wacom, i);
2343                                 continue;
2344                         }
2345
2346                         if (remote->remotes[i].serial)
2347                                 wacom_remote_destroy_one(wacom, i);
2348
2349                         wacom_remote_create_one(wacom, serial, i);
2350
2351                 } else if (remote->remotes[i].serial) {
2352                         wacom_remote_destroy_one(wacom, i);
2353                 }
2354         }
2355 }
2356
2357 static int wacom_probe(struct hid_device *hdev,
2358                 const struct hid_device_id *id)
2359 {
2360         struct wacom *wacom;
2361         struct wacom_wac *wacom_wac;
2362         struct wacom_features *features;
2363         int error;
2364
2365         if (!id->driver_data)
2366                 return -EINVAL;
2367
2368         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
2369
2370         /* hid-core sets this quirk for the boot interface */
2371         hdev->quirks &= ~HID_QUIRK_NOGET;
2372
2373         wacom = devm_kzalloc(&hdev->dev, sizeof(struct wacom), GFP_KERNEL);
2374         if (!wacom)
2375                 return -ENOMEM;
2376
2377         hid_set_drvdata(hdev, wacom);
2378         wacom->hdev = hdev;
2379
2380         wacom_wac = &wacom->wacom_wac;
2381         wacom_wac->features = *((struct wacom_features *)id->driver_data);
2382         features = &wacom_wac->features;
2383
2384         if (features->check_for_hid_type && features->hid_type != hdev->type) {
2385                 error = -ENODEV;
2386                 goto fail;
2387         }
2388
2389         wacom_wac->hid_data.inputmode = -1;
2390         wacom_wac->mode_report = -1;
2391
2392         if (hid_is_usb(hdev)) {
2393                 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
2394                 struct usb_device *dev = interface_to_usbdev(intf);
2395
2396                 wacom->usbdev = dev;
2397                 wacom->intf = intf;
2398         }
2399
2400         mutex_init(&wacom->lock);
2401         INIT_WORK(&wacom->wireless_work, wacom_wireless_work);
2402         INIT_WORK(&wacom->battery_work, wacom_battery_work);
2403         INIT_WORK(&wacom->remote_work, wacom_remote_work);
2404
2405         /* ask for the report descriptor to be loaded by HID */
2406         error = hid_parse(hdev);
2407         if (error) {
2408                 hid_err(hdev, "parse failed\n");
2409                 goto fail;
2410         }
2411
2412         error = wacom_parse_and_register(wacom, false);
2413         if (error)
2414                 goto fail;
2415
2416         if (hdev->bus == BUS_BLUETOOTH) {
2417                 error = device_create_file(&hdev->dev, &dev_attr_speed);
2418                 if (error)
2419                         hid_warn(hdev,
2420                                  "can't create sysfs speed attribute err: %d\n",
2421                                  error);
2422         }
2423
2424         return 0;
2425
2426 fail:
2427         hid_set_drvdata(hdev, NULL);
2428         return error;
2429 }
2430
2431 static void wacom_remove(struct hid_device *hdev)
2432 {
2433         struct wacom *wacom = hid_get_drvdata(hdev);
2434         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
2435         struct wacom_features *features = &wacom_wac->features;
2436
2437         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
2438                 hid_hw_close(hdev);
2439
2440         hid_hw_stop(hdev);
2441
2442         cancel_work_sync(&wacom->wireless_work);
2443         cancel_work_sync(&wacom->battery_work);
2444         cancel_work_sync(&wacom->remote_work);
2445         if (hdev->bus == BUS_BLUETOOTH)
2446                 device_remove_file(&hdev->dev, &dev_attr_speed);
2447
2448         wacom_release_resources(wacom);
2449
2450         hid_set_drvdata(hdev, NULL);
2451 }
2452
2453 #ifdef CONFIG_PM
2454 static int wacom_resume(struct hid_device *hdev)
2455 {
2456         struct wacom *wacom = hid_get_drvdata(hdev);
2457         struct wacom_features *features = &wacom->wacom_wac.features;
2458
2459         mutex_lock(&wacom->lock);
2460
2461         /* switch to wacom mode first */
2462         wacom_query_tablet_data(hdev, features);
2463         wacom_led_control(wacom);
2464
2465         mutex_unlock(&wacom->lock);
2466
2467         return 0;
2468 }
2469
2470 static int wacom_reset_resume(struct hid_device *hdev)
2471 {
2472         return wacom_resume(hdev);
2473 }
2474 #endif /* CONFIG_PM */
2475
2476 static struct hid_driver wacom_driver = {
2477         .name =         "wacom",
2478         .id_table =     wacom_ids,
2479         .probe =        wacom_probe,
2480         .remove =       wacom_remove,
2481         .report =       wacom_wac_report,
2482 #ifdef CONFIG_PM
2483         .resume =       wacom_resume,
2484         .reset_resume = wacom_reset_resume,
2485 #endif
2486         .raw_event =    wacom_raw_event,
2487 };
2488 module_hid_driver(wacom_driver);
2489
2490 MODULE_VERSION(DRIVER_VERSION);
2491 MODULE_AUTHOR(DRIVER_AUTHOR);
2492 MODULE_DESCRIPTION(DRIVER_DESC);
2493 MODULE_LICENSE(DRIVER_LICENSE);