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 #define WAC_REMOTE_SERIAL_MAX_STRLEN    9
  29
  30 #define DEV_ATTR_RW_PERM (S_IRUGO | S_IWUSR | S_IWGRP)
  31 #define DEV_ATTR_WO_PERM (S_IWUSR | S_IWGRP)
  32 #define DEV_ATTR_RO_PERM (S_IRUSR | S_IRGRP)
  33
  34 static int wacom_get_report(struct hid_device *hdev, u8 type, u8 *buf,
  35                             size_t size, unsigned int retries)
  36 {
  37         int retval;
  38
  39         do {
  40                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  41                                 HID_REQ_GET_REPORT);
  42         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  43
  44         if (retval < 0)
  45                 hid_err(hdev, "wacom_get_report: ran out of retries "
  46                         "(last error = %d)\n", retval);
  47
  48         return retval;
  49 }
  50
  51 static int wacom_set_report(struct hid_device *hdev, u8 type, u8 *buf,
  52                             size_t size, unsigned int retries)
  53 {
  54         int retval;
  55
  56         do {
  57                 retval = hid_hw_raw_request(hdev, buf[0], buf, size, type,
  58                                 HID_REQ_SET_REPORT);
  59         } while ((retval == -ETIMEDOUT || retval == -EAGAIN) && --retries);
  60
  61         if (retval < 0)
  62                 hid_err(hdev, "wacom_set_report: ran out of retries "
  63                         "(last error = %d)\n", retval);
  64
  65         return retval;
  66 }
  67
  68 static int wacom_raw_event(struct hid_device *hdev, struct hid_report *report,
  69                 u8 *raw_data, int size)
  70 {
  71         struct wacom *wacom = hid_get_drvdata(hdev);
  72
  73         if (size > WACOM_PKGLEN_MAX)
  74                 return 1;
  75
  76         memcpy(wacom->wacom_wac.data, raw_data, size);
  77
  78         wacom_wac_irq(&wacom->wacom_wac, size);
  79
  80         return 0;
  81 }
  82
  83 static int wacom_open(struct input_dev *dev)
  84 {
  85         struct wacom *wacom = input_get_drvdata(dev);
  86
  87         return hid_hw_open(wacom->hdev);
  88 }
  89
  90 static void wacom_close(struct input_dev *dev)
  91 {
  92         struct wacom *wacom = input_get_drvdata(dev);
  93
  94         hid_hw_close(wacom->hdev);
  95 }
  96
  97 /*
  98  * Calculate the resolution of the X or Y axis using hidinput_calc_abs_res.
  99  */
 100 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
 101                                unsigned unit, int exponent)
 102 {
 103         struct hid_field field = {
 104                 .logical_maximum = logical_extents,
 105                 .physical_maximum = physical_extents,
 106                 .unit = unit,
 107                 .unit_exponent = exponent,
 108         };
 109
 110         return hidinput_calc_abs_res(&field, ABS_X);
 111 }
 112
 113 static void wacom_feature_mapping(struct hid_device *hdev,
 114                 struct hid_field *field, struct hid_usage *usage)
 115 {
 116         struct wacom *wacom = hid_get_drvdata(hdev);
 117         struct wacom_features *features = &wacom->wacom_wac.features;
 118         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 119         u8 *data;
 120         int ret;
 121
 122         switch (usage->hid) {
 123         case HID_DG_CONTACTMAX:
 124                 /* leave touch_max as is if predefined */
 125                 if (!features->touch_max) {
 126                         /* read manually */
 127                         data = kzalloc(2, GFP_KERNEL);
 128                         if (!data)
 129                                 break;
 130                         data[0] = field->report->id;
 131                         ret = wacom_get_report(hdev, HID_FEATURE_REPORT,
 132                                                 data, 2, WAC_CMD_RETRIES);
 133                         if (ret == 2) {
 134                                 features->touch_max = data[1];
 135                         } else {
 136                                 features->touch_max = 16;
 137                                 hid_warn(hdev, "wacom_feature_mapping: "
 138                                          "could not get HID_DG_CONTACTMAX, "
 139                                          "defaulting to %d\n",
 140                                           features->touch_max);
 141                         }
 142                         kfree(data);
 143                 }
 144                 break;
 145         case HID_DG_INPUTMODE:
 146                 /* Ignore if value index is out of bounds. */
 147                 if (usage->usage_index >= field->report_count) {
 148                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 149                         break;
 150                 }
 151
 152                 hid_data->inputmode = field->report->id;
 153                 hid_data->inputmode_index = usage->usage_index;
 154                 break;
 155         }
 156 }
 157
 158 /*
 159  * Interface Descriptor of wacom devices can be incomplete and
 160  * inconsistent so wacom_features table is used to store stylus
 161  * device's packet lengths, various maximum values, and tablet
 162  * resolution based on product ID's.
 163  *
 164  * For devices that contain 2 interfaces, wacom_features table is
 165  * inaccurate for the touch interface.  Since the Interface Descriptor
 166  * for touch interfaces has pretty complete data, this function exists
 167  * to query tablet for this missing information instead of hard coding in
 168  * an additional table.
 169  *
 170  * A typical Interface Descriptor for a stylus will contain a
 171  * boot mouse application collection that is not of interest and this
 172  * function will ignore it.
 173  *
 174  * It also contains a digitizer application collection that also is not
 175  * of interest since any information it contains would be duplicate
 176  * of what is in wacom_features. Usually it defines a report of an array
 177  * of bytes that could be used as max length of the stylus packet returned.
 178  * If it happens to define a Digitizer-Stylus Physical Collection then
 179  * the X and Y logical values contain valid data but it is ignored.
 180  *
 181  * A typical Interface Descriptor for a touch interface will contain a
 182  * Digitizer-Finger Physical Collection which will define both logical
 183  * X/Y maximum as well as the physical size of tablet. Since touch
 184  * interfaces haven't supported pressure or distance, this is enough
 185  * information to override invalid values in the wacom_features table.
 186  *
 187  * Intuos5 touch interface and 3rd gen Bamboo Touch do not contain useful
 188  * data. We deal with them after returning from this function.
 189  */
 190 static void wacom_usage_mapping(struct hid_device *hdev,
 191                 struct hid_field *field, struct hid_usage *usage)
 192 {
 193         struct wacom *wacom = hid_get_drvdata(hdev);
 194         struct wacom_features *features = &wacom->wacom_wac.features;
 195         bool finger = WACOM_FINGER_FIELD(field);
 196         bool pen = WACOM_PEN_FIELD(field);
 197
 198         /*
 199         * Requiring Stylus Usage will ignore boot mouse
 200         * X/Y values and some cases of invalid Digitizer X/Y
 201         * values commonly reported.
 202         */
 203         if (pen)
 204                 features->device_type |= WACOM_DEVICETYPE_PEN;
 205         else if (finger)
 206                 features->device_type |= WACOM_DEVICETYPE_TOUCH;
 207         else
 208                 return;
 209
 210         /*
 211          * Bamboo models do not support HID_DG_CONTACTMAX.
 212          * And, Bamboo Pen only descriptor contains touch.
 213          */
 214         if (features->type > BAMBOO_PT) {
 215                 /* ISDv4 touch devices at least supports one touch point */
 216                 if (finger && !features->touch_max)
 217                         features->touch_max = 1;
 218         }
 219
 220         switch (usage->hid) {
 221         case HID_GD_X:
 222                 features->x_max = field->logical_maximum;
 223                 if (finger) {
 224                         features->x_phy = field->physical_maximum;
 225                         if ((features->type != BAMBOO_PT) &&
 226                             (features->type != BAMBOO_TOUCH)) {
 227                                 features->unit = field->unit;
 228                                 features->unitExpo = field->unit_exponent;
 229                         }
 230                 }
 231                 break;
 232         case HID_GD_Y:
 233                 features->y_max = field->logical_maximum;
 234                 if (finger) {
 235                         features->y_phy = field->physical_maximum;
 236                         if ((features->type != BAMBOO_PT) &&
 237                             (features->type != BAMBOO_TOUCH)) {
 238                                 features->unit = field->unit;
 239                                 features->unitExpo = field->unit_exponent;
 240                         }
 241                 }
 242                 break;
 243         case HID_DG_TIPPRESSURE:
 244                 if (pen)
 245                         features->pressure_max = field->logical_maximum;
 246                 break;
 247         }
 248
 249         if (features->type == HID_GENERIC)
 250                 wacom_wac_usage_mapping(hdev, field, usage);
 251 }
 252
 253 static void wacom_post_parse_hid(struct hid_device *hdev,
 254                                  struct wacom_features *features)
 255 {
 256         struct wacom *wacom = hid_get_drvdata(hdev);
 257         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 258
 259         if (features->type == HID_GENERIC) {
 260                 /* Any last-minute generic device setup */
 261                 if (features->touch_max > 1) {
 262                         input_mt_init_slots(wacom_wac->touch_input, wacom_wac->features.touch_max,
 263                                     INPUT_MT_DIRECT);
 264                 }
 265         }
 266 }
 267
 268 static void wacom_parse_hid(struct hid_device *hdev,
 269                            struct wacom_features *features)
 270 {
 271         struct hid_report_enum *rep_enum;
 272         struct hid_report *hreport;
 273         int i, j;
 274
 275         /* check features first */
 276         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
 277         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 278                 for (i = 0; i < hreport->maxfield; i++) {
 279                         /* Ignore if report count is out of bounds. */
 280                         if (hreport->field[i]->report_count < 1)
 281                                 continue;
 282
 283                         for (j = 0; j < hreport->field[i]->maxusage; j++) {
 284                                 wacom_feature_mapping(hdev, hreport->field[i],
 285                                                 hreport->field[i]->usage + j);
 286                         }
 287                 }
 288         }
 289
 290         /* now check the input usages */
 291         rep_enum = &hdev->report_enum[HID_INPUT_REPORT];
 292         list_for_each_entry(hreport, &rep_enum->report_list, list) {
 293
 294                 if (!hreport->maxfield)
 295                         continue;
 296
 297                 for (i = 0; i < hreport->maxfield; i++)
 298                         for (j = 0; j < hreport->field[i]->maxusage; j++)
 299                                 wacom_usage_mapping(hdev, hreport->field[i],
 300                                                 hreport->field[i]->usage + j);
 301         }
 302
 303         wacom_post_parse_hid(hdev, features);
 304 }
 305
 306 static int wacom_hid_set_device_mode(struct hid_device *hdev)
 307 {
 308         struct wacom *wacom = hid_get_drvdata(hdev);
 309         struct hid_data *hid_data = &wacom->wacom_wac.hid_data;
 310         struct hid_report *r;
 311         struct hid_report_enum *re;
 312
 313         if (hid_data->inputmode < 0)
 314                 return 0;
 315
 316         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 317         r = re->report_id_hash[hid_data->inputmode];
 318         if (r) {
 319                 r->field[0]->value[hid_data->inputmode_index] = 2;
 320                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 321         }
 322         return 0;
 323 }
 324
 325 static int wacom_set_device_mode(struct hid_device *hdev, int report_id,
 326                 int length, int mode)
 327 {
 328         unsigned char *rep_data;
 329         int error = -ENOMEM, limit = 0;
 330
 331         rep_data = kzalloc(length, GFP_KERNEL);
 332         if (!rep_data)
 333                 return error;
 334
 335         do {
 336                 rep_data[0] = report_id;
 337                 rep_data[1] = mode;
 338
 339                 error = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data,
 340                                          length, 1);
 341                 if (error >= 0)
 342                         error = wacom_get_report(hdev, HID_FEATURE_REPORT,
 343                                                  rep_data, length, 1);
 344         } while (error >= 0 && rep_data[1] != mode && limit++ < WAC_MSG_RETRIES);
 345
 346         kfree(rep_data);
 347
 348         return error < 0 ? error : 0;
 349 }
 350
 351 static int wacom_bt_query_tablet_data(struct hid_device *hdev, u8 speed,
 352                 struct wacom_features *features)
 353 {
 354         struct wacom *wacom = hid_get_drvdata(hdev);
 355         int ret;
 356         u8 rep_data[2];
 357
 358         switch (features->type) {
 359         case GRAPHIRE_BT:
 360                 rep_data[0] = 0x03;
 361                 rep_data[1] = 0x00;
 362                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 363                                         3);
 364
 365                 if (ret >= 0) {
 366                         rep_data[0] = speed == 0 ? 0x05 : 0x06;
 367                         rep_data[1] = 0x00;
 368
 369                         ret = wacom_set_report(hdev, HID_FEATURE_REPORT,
 370                                                 rep_data, 2, 3);
 371
 372                         if (ret >= 0) {
 373                                 wacom->wacom_wac.bt_high_speed = speed;
 374                                 return 0;
 375                         }
 376                 }
 377
 378                 /*
 379                  * Note that if the raw queries fail, it's not a hard failure
 380                  * and it is safe to continue
 381                  */
 382                 hid_warn(hdev, "failed to poke device, command %d, err %d\n",
 383                          rep_data[0], ret);
 384                 break;
 385         case INTUOS4WL:
 386                 if (speed == 1)
 387                         wacom->wacom_wac.bt_features &= ~0x20;
 388                 else
 389                         wacom->wacom_wac.bt_features |= 0x20;
 390
 391                 rep_data[0] = 0x03;
 392                 rep_data[1] = wacom->wacom_wac.bt_features;
 393
 394                 ret = wacom_set_report(hdev, HID_FEATURE_REPORT, rep_data, 2,
 395                                         1);
 396                 if (ret >= 0)
 397                         wacom->wacom_wac.bt_high_speed = speed;
 398                 break;
 399         }
 400
 401         return 0;
 402 }
 403
 404 /*
 405  * Switch the tablet into its most-capable mode. Wacom tablets are
 406  * typically configured to power-up in a mode which sends mouse-like
 407  * reports to the OS. To get absolute position, pressure data, etc.
 408  * from the tablet, it is necessary to switch the tablet out of this
 409  * mode and into one which sends the full range of tablet data.
 410  */
 411 static int wacom_query_tablet_data(struct hid_device *hdev,
 412                 struct wacom_features *features)
 413 {
 414         if (hdev->bus == BUS_BLUETOOTH)
 415                 return wacom_bt_query_tablet_data(hdev, 1, features);
 416
 417         if (features->type == HID_GENERIC)
 418                 return wacom_hid_set_device_mode(hdev);
 419
 420         if (features->device_type & WACOM_DEVICETYPE_TOUCH) {
 421                 if (features->type > TABLETPC) {
 422                         /* MT Tablet PC touch */
 423                         return wacom_set_device_mode(hdev, 3, 4, 4);
 424                 }
 425                 else if (features->type == WACOM_24HDT) {
 426                         return wacom_set_device_mode(hdev, 18, 3, 2);
 427                 }
 428                 else if (features->type == WACOM_27QHDT) {
 429                         return wacom_set_device_mode(hdev, 131, 3, 2);
 430                 }
 431                 else if (features->type == BAMBOO_PAD) {
 432                         return wacom_set_device_mode(hdev, 2, 2, 2);
 433                 }
 434         } else if (features->device_type & WACOM_DEVICETYPE_PEN) {
 435                 if (features->type <= BAMBOO_PT) {
 436                         return wacom_set_device_mode(hdev, 2, 2, 2);
 437                 }
 438         }
 439
 440         return 0;
 441 }
 442
 443 static void wacom_retrieve_hid_descriptor(struct hid_device *hdev,
 444                                          struct wacom_features *features)
 445 {
 446         struct wacom *wacom = hid_get_drvdata(hdev);
 447         struct usb_interface *intf = wacom->intf;
 448
 449         /* default features */
 450         features->x_fuzz = 4;
 451         features->y_fuzz = 4;
 452         features->pressure_fuzz = 0;
 453         features->distance_fuzz = 0;
 454
 455         /*
 456          * The wireless device HID is basic and layout conflicts with
 457          * other tablets (monitor and touch interface can look like pen).
 458          * Skip the query for this type and modify defaults based on
 459          * interface number.
 460          */
 461         if (features->type == WIRELESS) {
 462                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0)
 463                         features->device_type = WACOM_DEVICETYPE_WL_MONITOR;
 464                 else
 465                         features->device_type = WACOM_DEVICETYPE_NONE;
 466                 return;
 467         }
 468
 469         wacom_parse_hid(hdev, features);
 470 }
 471
 472 struct wacom_hdev_data {
 473         struct list_head list;
 474         struct kref kref;
 475         struct hid_device *dev;
 476         struct wacom_shared shared;
 477 };
 478
 479 static LIST_HEAD(wacom_udev_list);
 480 static DEFINE_MUTEX(wacom_udev_list_lock);
 481
 482 static bool wacom_are_sibling(struct hid_device *hdev,
 483                 struct hid_device *sibling)
 484 {
 485         struct wacom *wacom = hid_get_drvdata(hdev);
 486         struct wacom_features *features = &wacom->wacom_wac.features;
 487         int vid = features->oVid;
 488         int pid = features->oPid;
 489         int n1,n2;
 490
 491         if (vid == 0 && pid == 0) {
 492                 vid = hdev->vendor;
 493                 pid = hdev->product;
 494         }
 495
 496         if (vid != sibling->vendor || pid != sibling->product)
 497                 return false;
 498
 499         /* Compare the physical path. */
 500         n1 = strrchr(hdev->phys, '.') - hdev->phys;
 501         n2 = strrchr(sibling->phys, '.') - sibling->phys;
 502         if (n1 != n2 || n1 <= 0 || n2 <= 0)
 503                 return false;
 504
 505         return !strncmp(hdev->phys, sibling->phys, n1);
 506 }
 507
 508 static struct wacom_hdev_data *wacom_get_hdev_data(struct hid_device *hdev)
 509 {
 510         struct wacom_hdev_data *data;
 511
 512         list_for_each_entry(data, &wacom_udev_list, list) {
 513                 if (wacom_are_sibling(hdev, data->dev)) {
 514                         kref_get(&data->kref);
 515                         return data;
 516                 }
 517         }
 518
 519         return NULL;
 520 }
 521
 522 static int wacom_add_shared_data(struct hid_device *hdev)
 523 {
 524         struct wacom *wacom = hid_get_drvdata(hdev);
 525         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 526         struct wacom_hdev_data *data;
 527         int retval = 0;
 528
 529         mutex_lock(&wacom_udev_list_lock);
 530
 531         data = wacom_get_hdev_data(hdev);
 532         if (!data) {
 533                 data = kzalloc(sizeof(struct wacom_hdev_data), GFP_KERNEL);
 534                 if (!data) {
 535                         retval = -ENOMEM;
 536                         goto out;
 537                 }
 538
 539                 kref_init(&data->kref);
 540                 data->dev = hdev;
 541                 list_add_tail(&data->list, &wacom_udev_list);
 542         }
 543
 544         wacom_wac->shared = &data->shared;
 545
 546         if (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)
 547                 wacom_wac->shared->touch = hdev;
 548         else if (wacom_wac->features.device_type & WACOM_DEVICETYPE_PEN)
 549                 wacom_wac->shared->pen = hdev;
 550
 551 out:
 552         mutex_unlock(&wacom_udev_list_lock);
 553         return retval;
 554 }
 555
 556 static void wacom_release_shared_data(struct kref *kref)
 557 {
 558         struct wacom_hdev_data *data =
 559                 container_of(kref, struct wacom_hdev_data, kref);
 560
 561         mutex_lock(&wacom_udev_list_lock);
 562         list_del(&data->list);
 563         mutex_unlock(&wacom_udev_list_lock);
 564
 565         kfree(data);
 566 }
 567
 568 static void wacom_remove_shared_data(struct wacom *wacom)
 569 {
 570         struct wacom_hdev_data *data;
 571         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
 572
 573         if (wacom_wac->shared) {
 574                 data = container_of(wacom_wac->shared, struct wacom_hdev_data,
 575                                     shared);
 576
 577                 if (wacom_wac->shared->touch == wacom->hdev)
 578                         wacom_wac->shared->touch = NULL;
 579                 else if (wacom_wac->shared->pen == wacom->hdev)
 580                         wacom_wac->shared->pen = NULL;
 581
 582                 kref_put(&data->kref, wacom_release_shared_data);
 583                 wacom_wac->shared = NULL;
 584         }
 585 }
 586
 587 static int wacom_led_control(struct wacom *wacom)
 588 {
 589         unsigned char *buf;
 590         int retval;
 591         unsigned char report_id = WAC_CMD_LED_CONTROL;
 592         int buf_size = 9;
 593
 594         if (wacom->wacom_wac.pid) { /* wireless connected */
 595                 report_id = WAC_CMD_WL_LED_CONTROL;
 596                 buf_size = 13;
 597         }
 598         buf = kzalloc(buf_size, GFP_KERNEL);
 599         if (!buf)
 600                 return -ENOMEM;
 601
 602         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 603             wacom->wacom_wac.features.type <= INTUOSPL) {
 604                 /*
 605                  * Touch Ring and crop mark LED luminance may take on
 606                  * one of four values:
 607                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 608                  */
 609                 int ring_led = wacom->led.select[0] & 0x03;
 610                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 611                 int crop_lum = 0;
 612                 unsigned char led_bits = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 613
 614                 buf[0] = report_id;
 615                 if (wacom->wacom_wac.pid) {
 616                         wacom_get_report(wacom->hdev, HID_FEATURE_REPORT,
 617                                          buf, buf_size, WAC_CMD_RETRIES);
 618                         buf[0] = report_id;
 619                         buf[4] = led_bits;
 620                 } else
 621                         buf[1] = led_bits;
 622         }
 623         else {
 624                 int led = wacom->led.select[0] | 0x4;
 625
 626                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 627                     wacom->wacom_wac.features.type == WACOM_24HD)
 628                         led |= (wacom->led.select[1] << 4) | 0x40;
 629
 630                 buf[0] = report_id;
 631                 buf[1] = led;
 632                 buf[2] = wacom->led.llv;
 633                 buf[3] = wacom->led.hlv;
 634                 buf[4] = wacom->led.img_lum;
 635         }
 636
 637         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, buf_size,
 638                                   WAC_CMD_RETRIES);
 639         kfree(buf);
 640
 641         return retval;
 642 }
 643
 644 static int wacom_led_putimage(struct wacom *wacom, int button_id, u8 xfer_id,
 645                 const unsigned len, const void *img)
 646 {
 647         unsigned char *buf;
 648         int i, retval;
 649         const unsigned chunk_len = len / 4; /* 4 chunks are needed to be sent */
 650
 651         buf = kzalloc(chunk_len + 3 , GFP_KERNEL);
 652         if (!buf)
 653                 return -ENOMEM;
 654
 655         /* Send 'start' command */
 656         buf[0] = WAC_CMD_ICON_START;
 657         buf[1] = 1;
 658         retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 659                                   WAC_CMD_RETRIES);
 660         if (retval < 0)
 661                 goto out;
 662
 663         buf[0] = xfer_id;
 664         buf[1] = button_id & 0x07;
 665         for (i = 0; i < 4; i++) {
 666                 buf[2] = i;
 667                 memcpy(buf + 3, img + i * chunk_len, chunk_len);
 668
 669                 retval = wacom_set_report(wacom->hdev, HID_FEATURE_REPORT,
 670                                           buf, chunk_len + 3, WAC_CMD_RETRIES);
 671                 if (retval < 0)
 672                         break;
 673         }
 674
 675         /* Send 'stop' */
 676         buf[0] = WAC_CMD_ICON_START;
 677         buf[1] = 0;
 678         wacom_set_report(wacom->hdev, HID_FEATURE_REPORT, buf, 2,
 679                          WAC_CMD_RETRIES);
 680
 681 out:
 682         kfree(buf);
 683         return retval;
 684 }
 685
 686 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 687                                       const char *buf, size_t count)
 688 {
 689         struct hid_device *hdev = to_hid_device(dev);
 690         struct wacom *wacom = hid_get_drvdata(hdev);
 691         unsigned int id;
 692         int err;
 693
 694         err = kstrtouint(buf, 10, &id);
 695         if (err)
 696                 return err;
 697
 698         mutex_lock(&wacom->lock);
 699
 700         wacom->led.select[set_id] = id & 0x3;
 701         err = wacom_led_control(wacom);
 702
 703         mutex_unlock(&wacom->lock);
 704
 705         return err < 0 ? err : count;
 706 }
 707
 708 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 709 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 710         struct device_attribute *attr, const char *buf, size_t count)   \
 711 {                                                                       \
 712         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 713 }                                                                       \
 714 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 715         struct device_attribute *attr, char *buf)                       \
 716 {                                                                       \
 717         struct hid_device *hdev = to_hid_device(dev);\
 718         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 719         return scnprintf(buf, PAGE_SIZE, "%d\n",                        \
 720                          wacom->led.select[SET_ID]);                    \
 721 }                                                                       \
 722 static DEVICE_ATTR(status_led##SET_ID##_select, DEV_ATTR_RW_PERM,       \
 723                     wacom_led##SET_ID##_select_show,                    \
 724                     wacom_led##SET_ID##_select_store)
 725
 726 DEVICE_LED_SELECT_ATTR(0);
 727 DEVICE_LED_SELECT_ATTR(1);
 728
 729 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 730                                      const char *buf, size_t count)
 731 {
 732         unsigned int value;
 733         int err;
 734
 735         err = kstrtouint(buf, 10, &value);
 736         if (err)
 737                 return err;
 738
 739         mutex_lock(&wacom->lock);
 740
 741         *dest = value & 0x7f;
 742         err = wacom_led_control(wacom);
 743
 744         mutex_unlock(&wacom->lock);
 745
 746         return err < 0 ? err : count;
 747 }
 748
 749 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 750 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 751         struct device_attribute *attr, const char *buf, size_t count)   \
 752 {                                                                       \
 753         struct hid_device *hdev = to_hid_device(dev);\
 754         struct wacom *wacom = hid_get_drvdata(hdev);                    \
 755                                                                         \
 756         return wacom_luminance_store(wacom, &wacom->led.field,          \
 757                                      buf, count);                       \
 758 }                                                                       \
 759 static ssize_t wacom_##name##_luminance_show(struct device *dev,        \
 760         struct device_attribute *attr, char *buf)                       \
 761 {                                                                       \
 762         struct wacom *wacom = dev_get_drvdata(dev);                     \
 763         return scnprintf(buf, PAGE_SIZE, "%d\n", wacom->led.field);     \
 764 }                                                                       \
 765 static DEVICE_ATTR(name##_luminance, DEV_ATTR_RW_PERM,                  \
 766                    wacom_##name##_luminance_show,                       \
 767                    wacom_##name##_luminance_store)
 768
 769 DEVICE_LUMINANCE_ATTR(status0, llv);
 770 DEVICE_LUMINANCE_ATTR(status1, hlv);
 771 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 772
 773 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 774                                         const char *buf, size_t count)
 775 {
 776         struct hid_device *hdev = to_hid_device(dev);
 777         struct wacom *wacom = hid_get_drvdata(hdev);
 778         int err;
 779         unsigned len;
 780         u8 xfer_id;
 781
 782         if (hdev->bus == BUS_BLUETOOTH) {
 783                 len = 256;
 784                 xfer_id = WAC_CMD_ICON_BT_XFER;
 785         } else {
 786                 len = 1024;
 787                 xfer_id = WAC_CMD_ICON_XFER;
 788         }
 789
 790         if (count != len)
 791                 return -EINVAL;
 792
 793         mutex_lock(&wacom->lock);
 794
 795         err = wacom_led_putimage(wacom, button_id, xfer_id, len, buf);
 796
 797         mutex_unlock(&wacom->lock);
 798
 799         return err < 0 ? err : count;
 800 }
 801
 802 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 803 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 804         struct device_attribute *attr, const char *buf, size_t count)   \
 805 {                                                                       \
 806         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 807 }                                                                       \
 808 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, DEV_ATTR_WO_PERM,        \
 809                    NULL, wacom_btnimg##BUTTON_ID##_store)
 810
 811 DEVICE_BTNIMG_ATTR(0);
 812 DEVICE_BTNIMG_ATTR(1);
 813 DEVICE_BTNIMG_ATTR(2);
 814 DEVICE_BTNIMG_ATTR(3);
 815 DEVICE_BTNIMG_ATTR(4);
 816 DEVICE_BTNIMG_ATTR(5);
 817 DEVICE_BTNIMG_ATTR(6);
 818 DEVICE_BTNIMG_ATTR(7);
 819
 820 static struct attribute *cintiq_led_attrs[] = {
 821         &dev_attr_status_led0_select.attr,
 822         &dev_attr_status_led1_select.attr,
 823         NULL
 824 };
 825
 826 static struct attribute_group cintiq_led_attr_group = {
 827         .name = "wacom_led",
 828         .attrs = cintiq_led_attrs,
 829 };
 830
 831 static struct attribute *intuos4_led_attrs[] = {
 832         &dev_attr_status0_luminance.attr,
 833         &dev_attr_status1_luminance.attr,
 834         &dev_attr_status_led0_select.attr,
 835         &dev_attr_buttons_luminance.attr,
 836         &dev_attr_button0_rawimg.attr,
 837         &dev_attr_button1_rawimg.attr,
 838         &dev_attr_button2_rawimg.attr,
 839         &dev_attr_button3_rawimg.attr,
 840         &dev_attr_button4_rawimg.attr,
 841         &dev_attr_button5_rawimg.attr,
 842         &dev_attr_button6_rawimg.attr,
 843         &dev_attr_button7_rawimg.attr,
 844         NULL
 845 };
 846
 847 static struct attribute_group intuos4_led_attr_group = {
 848         .name = "wacom_led",
 849         .attrs = intuos4_led_attrs,
 850 };
 851
 852 static struct attribute *intuos5_led_attrs[] = {
 853         &dev_attr_status0_luminance.attr,
 854         &dev_attr_status_led0_select.attr,
 855         NULL
 856 };
 857
 858 static struct attribute_group intuos5_led_attr_group = {
 859         .name = "wacom_led",
 860         .attrs = intuos5_led_attrs,
 861 };
 862
 863 static int wacom_initialize_leds(struct wacom *wacom)
 864 {
 865         int error;
 866
 867         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 868                 return 0;
 869
 870         /* Initialize default values */
 871         switch (wacom->wacom_wac.features.type) {
 872         case INTUOS4S:
 873         case INTUOS4:
 874         case INTUOS4WL:
 875         case INTUOS4L:
 876                 wacom->led.select[0] = 0;
 877                 wacom->led.select[1] = 0;
 878                 wacom->led.llv = 10;
 879                 wacom->led.hlv = 20;
 880                 wacom->led.img_lum = 10;
 881                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 882                                            &intuos4_led_attr_group);
 883                 break;
 884
 885         case WACOM_24HD:
 886         case WACOM_21UX2:
 887                 wacom->led.select[0] = 0;
 888                 wacom->led.select[1] = 0;
 889                 wacom->led.llv = 0;
 890                 wacom->led.hlv = 0;
 891                 wacom->led.img_lum = 0;
 892
 893                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 894                                            &cintiq_led_attr_group);
 895                 break;
 896
 897         case INTUOS5S:
 898         case INTUOS5:
 899         case INTUOS5L:
 900         case INTUOSPS:
 901         case INTUOSPM:
 902         case INTUOSPL:
 903                 wacom->led.select[0] = 0;
 904                 wacom->led.select[1] = 0;
 905                 wacom->led.llv = 32;
 906                 wacom->led.hlv = 0;
 907                 wacom->led.img_lum = 0;
 908
 909                 error = sysfs_create_group(&wacom->hdev->dev.kobj,
 910                                           &intuos5_led_attr_group);
 911                 break;
 912
 913         default:
 914                 return 0;
 915         }
 916
 917         if (error) {
 918                 hid_err(wacom->hdev,
 919                         "cannot create sysfs group err: %d\n", error);
 920                 return error;
 921         }
 922         wacom_led_control(wacom);
 923         wacom->led_initialized = true;
 924
 925         return 0;
 926 }
 927
 928 static void wacom_destroy_leds(struct wacom *wacom)
 929 {
 930         if (!wacom->led_initialized)
 931                 return;
 932
 933         if (!(wacom->wacom_wac.features.device_type & WACOM_DEVICETYPE_PAD))
 934                 return;
 935
 936         wacom->led_initialized = false;
 937
 938         switch (wacom->wacom_wac.features.type) {
 939         case INTUOS4S:
 940         case INTUOS4:
 941         case INTUOS4WL:
 942         case INTUOS4L:
 943                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 944                                    &intuos4_led_attr_group);
 945                 break;
 946
 947         case WACOM_24HD:
 948         case WACOM_21UX2:
 949                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 950                                    &cintiq_led_attr_group);
 951                 break;
 952
 953         case INTUOS5S:
 954         case INTUOS5:
 955         case INTUOS5L:
 956         case INTUOSPS:
 957         case INTUOSPM:
 958         case INTUOSPL:
 959                 sysfs_remove_group(&wacom->hdev->dev.kobj,
 960                                    &intuos5_led_attr_group);
 961                 break;
 962         }
 963 }
 964
 965 static enum power_supply_property wacom_battery_props[] = {
 966         POWER_SUPPLY_PROP_PRESENT,
 967         POWER_SUPPLY_PROP_STATUS,
 968         POWER_SUPPLY_PROP_SCOPE,
 969         POWER_SUPPLY_PROP_CAPACITY
 970 };
 971
 972 static enum power_supply_property wacom_ac_props[] = {
 973         POWER_SUPPLY_PROP_PRESENT,
 974         POWER_SUPPLY_PROP_ONLINE,
 975         POWER_SUPPLY_PROP_SCOPE,
 976 };
 977
 978 static int wacom_battery_get_property(struct power_supply *psy,
 979                                       enum power_supply_property psp,
 980                                       union power_supply_propval *val)
 981 {
 982         struct wacom *wacom = power_supply_get_drvdata(psy);
 983         int ret = 0;
 984
 985         switch (psp) {
 986                 case POWER_SUPPLY_PROP_PRESENT:
 987                         val->intval = wacom->wacom_wac.bat_connected;
 988                         break;
 989                 case POWER_SUPPLY_PROP_SCOPE:
 990                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
 991                         break;
 992                 case POWER_SUPPLY_PROP_CAPACITY:
 993                         val->intval =
 994                                 wacom->wacom_wac.battery_capacity;
 995                         break;
 996                 case POWER_SUPPLY_PROP_STATUS:
 997                         if (wacom->wacom_wac.bat_charging)
 998                                 val->intval = POWER_SUPPLY_STATUS_CHARGING;
 999                         else if (wacom->wacom_wac.battery_capacity == 100 &&
1000                                     wacom->wacom_wac.ps_connected)
1001                                 val->intval = POWER_SUPPLY_STATUS_FULL;
1002                         else if (wacom->wacom_wac.ps_connected)
1003                                 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
1004                         else
1005                                 val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
1006                         break;
1007                 default:
1008                         ret = -EINVAL;
1009                         break;
1010         }
1011
1012         return ret;
1013 }
1014
1015 static int wacom_ac_get_property(struct power_supply *psy,
1016                                 enum power_supply_property psp,
1017                                 union power_supply_propval *val)
1018 {
1019         struct wacom *wacom = power_supply_get_drvdata(psy);
1020         int ret = 0;
1021
1022         switch (psp) {
1023         case POWER_SUPPLY_PROP_PRESENT:
1024                 /* fall through */
1025         case POWER_SUPPLY_PROP_ONLINE:
1026                 val->intval = wacom->wacom_wac.ps_connected;
1027                 break;
1028         case POWER_SUPPLY_PROP_SCOPE:
1029                 val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1030                 break;
1031         default:
1032                 ret = -EINVAL;
1033                 break;
1034         }
1035         return ret;
1036 }
1037
1038 static int wacom_initialize_battery(struct wacom *wacom)
1039 {
1040         static atomic_t battery_no = ATOMIC_INIT(0);
1041         struct power_supply_config psy_cfg = { .drv_data = wacom, };
1042         unsigned long n;
1043
1044         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
1045                 struct power_supply_desc *bat_desc = &wacom->battery_desc;
1046                 struct power_supply_desc *ac_desc = &wacom->ac_desc;
1047                 n = atomic_inc_return(&battery_no) - 1;
1048
1049                 bat_desc->properties = wacom_battery_props;
1050                 bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
1051                 bat_desc->get_property = wacom_battery_get_property;
1052                 sprintf(wacom->wacom_wac.bat_name, "wacom_battery_%ld", n);
1053                 bat_desc->name = wacom->wacom_wac.bat_name;
1054                 bat_desc->type = POWER_SUPPLY_TYPE_BATTERY;
1055                 bat_desc->use_for_apm = 0;
1056
1057                 ac_desc->properties = wacom_ac_props;
1058                 ac_desc->num_properties = ARRAY_SIZE(wacom_ac_props);
1059                 ac_desc->get_property = wacom_ac_get_property;
1060                 sprintf(wacom->wacom_wac.ac_name, "wacom_ac_%ld", n);
1061                 ac_desc->name = wacom->wacom_wac.ac_name;
1062                 ac_desc->type = POWER_SUPPLY_TYPE_MAINS;
1063                 ac_desc->use_for_apm = 0;
1064
1065                 wacom->battery = power_supply_register(&wacom->hdev->dev,
1066                                               &wacom->battery_desc, &psy_cfg);
1067                 if (IS_ERR(wacom->battery))
1068                         return PTR_ERR(wacom->battery);
1069
1070                 power_supply_powers(wacom->battery, &wacom->hdev->dev);
1071
1072                 wacom->ac = power_supply_register(&wacom->hdev->dev,
1073                                                   &wacom->ac_desc,
1074                                                   &psy_cfg);
1075                 if (IS_ERR(wacom->ac)) {
1076                         power_supply_unregister(wacom->battery);
1077                         return PTR_ERR(wacom->ac);
1078                 }
1079
1080                 power_supply_powers(wacom->ac, &wacom->hdev->dev);
1081         }
1082
1083         return 0;
1084 }
1085
1086 static void wacom_destroy_battery(struct wacom *wacom)
1087 {
1088         if (wacom->battery) {
1089                 power_supply_unregister(wacom->battery);
1090                 wacom->battery = NULL;
1091                 power_supply_unregister(wacom->ac);
1092                 wacom->ac = NULL;
1093         }
1094 }
1095
1096 static ssize_t wacom_show_speed(struct device *dev,
1097                                 struct device_attribute
1098                                 *attr, char *buf)
1099 {
1100         struct hid_device *hdev = to_hid_device(dev);
1101         struct wacom *wacom = hid_get_drvdata(hdev);
1102
1103         return snprintf(buf, PAGE_SIZE, "%i\n", wacom->wacom_wac.bt_high_speed);
1104 }
1105
1106 static ssize_t wacom_store_speed(struct device *dev,
1107                                 struct device_attribute *attr,
1108                                 const char *buf, size_t count)
1109 {
1110         struct hid_device *hdev = to_hid_device(dev);
1111         struct wacom *wacom = hid_get_drvdata(hdev);
1112         u8 new_speed;
1113
1114         if (kstrtou8(buf, 0, &new_speed))
1115                 return -EINVAL;
1116
1117         if (new_speed != 0 && new_speed != 1)
1118                 return -EINVAL;
1119
1120         wacom_bt_query_tablet_data(hdev, new_speed, &wacom->wacom_wac.features);
1121
1122         return count;
1123 }
1124
1125 static DEVICE_ATTR(speed, DEV_ATTR_RW_PERM,
1126                 wacom_show_speed, wacom_store_speed);
1127
1128
1129 static ssize_t wacom_show_remote_mode(struct kobject *kobj,
1130                                       struct kobj_attribute *kattr,
1131                                       char *buf, int index)
1132 {
1133         struct device *dev = kobj_to_dev(kobj->parent);
1134         struct hid_device *hdev = to_hid_device(dev);
1135         struct wacom *wacom = hid_get_drvdata(hdev);
1136         u8 mode;
1137
1138         mode = wacom->led.select[index];
1139         if (mode >= 0 && mode < 3)
1140                 return snprintf(buf, PAGE_SIZE, "%d\n", mode);
1141         else
1142                 return snprintf(buf, PAGE_SIZE, "%d\n", -1);
1143 }
1144
1145 #define DEVICE_EKR_ATTR_GROUP(SET_ID)                                   \
1146 static ssize_t wacom_show_remote##SET_ID##_mode(struct kobject *kobj,   \
1147                                struct kobj_attribute *kattr, char *buf) \
1148 {                                                                       \
1149         return wacom_show_remote_mode(kobj, kattr, buf, SET_ID);        \
1150 }                                                                       \
1151 static struct kobj_attribute remote##SET_ID##_mode_attr = {             \
1152         .attr = {.name = "remote_mode",                                 \
1153                 .mode = DEV_ATTR_RO_PERM},                              \
1154         .show = wacom_show_remote##SET_ID##_mode,                       \
1155 };                                                                      \
1156 static struct attribute *remote##SET_ID##_serial_attrs[] = {            \
1157         &remote##SET_ID##_mode_attr.attr,                               \
1158         NULL                                                            \
1159 };                                                                      \
1160 static struct attribute_group remote##SET_ID##_serial_group = {         \
1161         .name = NULL,                                                   \
1162         .attrs = remote##SET_ID##_serial_attrs,                         \
1163 }
1164
1165 DEVICE_EKR_ATTR_GROUP(0);
1166 DEVICE_EKR_ATTR_GROUP(1);
1167 DEVICE_EKR_ATTR_GROUP(2);
1168 DEVICE_EKR_ATTR_GROUP(3);
1169 DEVICE_EKR_ATTR_GROUP(4);
1170
1171 int wacom_remote_create_attr_group(struct wacom *wacom, __u32 serial, int index)
1172 {
1173         int error = 0;
1174         char *buf;
1175         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1176
1177         wacom_wac->serial[index] = serial;
1178
1179         buf = kzalloc(WAC_REMOTE_SERIAL_MAX_STRLEN, GFP_KERNEL);
1180         if (!buf)
1181                 return -ENOMEM;
1182         snprintf(buf, WAC_REMOTE_SERIAL_MAX_STRLEN, "%d", serial);
1183         wacom->remote_group[index].name = buf;
1184
1185         error = sysfs_create_group(wacom->remote_dir,
1186                                    &wacom->remote_group[index]);
1187         if (error) {
1188                 hid_err(wacom->hdev,
1189                         "cannot create sysfs group err: %d\n", error);
1190                 kobject_put(wacom->remote_dir);
1191                 return error;
1192         }
1193
1194         return 0;
1195 }
1196
1197 void wacom_remote_destroy_attr_group(struct wacom *wacom, __u32 serial)
1198 {
1199         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1200         int i;
1201
1202         if (!serial)
1203                 return;
1204
1205         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1206                 if (wacom_wac->serial[i] == serial) {
1207                         wacom_wac->serial[i] = 0;
1208                         wacom->led.select[i] = WACOM_STATUS_UNKNOWN;
1209                         if (wacom->remote_group[i].name) {
1210                                 sysfs_remove_group(wacom->remote_dir,
1211                                                    &wacom->remote_group[i]);
1212                                 kfree(wacom->remote_group[i].name);
1213                                 wacom->remote_group[i].name = NULL;
1214                         }
1215                 }
1216         }
1217 }
1218
1219 static int wacom_cmd_unpair_remote(struct wacom *wacom, unsigned char selector)
1220 {
1221         const size_t buf_size = 2;
1222         unsigned char *buf;
1223         int retval;
1224
1225         buf = kzalloc(buf_size, GFP_KERNEL);
1226         if (!buf)
1227                 return -ENOMEM;
1228
1229         buf[0] = WAC_CMD_DELETE_PAIRING;
1230         buf[1] = selector;
1231
1232         retval = wacom_set_report(wacom->hdev, HID_OUTPUT_REPORT, buf,
1233                                   buf_size, WAC_CMD_RETRIES);
1234         kfree(buf);
1235
1236         return retval;
1237 }
1238
1239 static ssize_t wacom_store_unpair_remote(struct kobject *kobj,
1240                                          struct kobj_attribute *attr,
1241                                          const char *buf, size_t count)
1242 {
1243         unsigned char selector = 0;
1244         struct device *dev = kobj_to_dev(kobj->parent);
1245         struct hid_device *hdev = to_hid_device(dev);
1246         struct wacom *wacom = hid_get_drvdata(hdev);
1247         int err;
1248
1249         if (!strncmp(buf, "*\n", 2)) {
1250                 selector = WAC_CMD_UNPAIR_ALL;
1251         } else {
1252                 hid_info(wacom->hdev, "remote: unrecognized unpair code: %s\n",
1253                          buf);
1254                 return -1;
1255         }
1256
1257         mutex_lock(&wacom->lock);
1258
1259         err = wacom_cmd_unpair_remote(wacom, selector);
1260         mutex_unlock(&wacom->lock);
1261
1262         return err < 0 ? err : count;
1263 }
1264
1265 static struct kobj_attribute unpair_remote_attr = {
1266         .attr = {.name = "unpair_remote", .mode = 0200},
1267         .store = wacom_store_unpair_remote,
1268 };
1269
1270 static const struct attribute *remote_unpair_attrs[] = {
1271         &unpair_remote_attr.attr,
1272         NULL
1273 };
1274
1275 static int wacom_initialize_remote(struct wacom *wacom)
1276 {
1277         int error = 0;
1278         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1279         int i;
1280
1281         if (wacom->wacom_wac.features.type != REMOTE)
1282                 return 0;
1283
1284         wacom->remote_group[0] = remote0_serial_group;
1285         wacom->remote_group[1] = remote1_serial_group;
1286         wacom->remote_group[2] = remote2_serial_group;
1287         wacom->remote_group[3] = remote3_serial_group;
1288         wacom->remote_group[4] = remote4_serial_group;
1289
1290         wacom->remote_dir = kobject_create_and_add("wacom_remote",
1291                                                    &wacom->hdev->dev.kobj);
1292         if (!wacom->remote_dir)
1293                 return -ENOMEM;
1294
1295         error = sysfs_create_files(wacom->remote_dir, remote_unpair_attrs);
1296
1297         if (error) {
1298                 hid_err(wacom->hdev,
1299                         "cannot create sysfs group err: %d\n", error);
1300                 return error;
1301         }
1302
1303         for (i = 0; i < WACOM_MAX_REMOTES; i++) {
1304                 wacom->led.select[i] = WACOM_STATUS_UNKNOWN;
1305                 wacom_wac->serial[i] = 0;
1306         }
1307
1308         return 0;
1309 }
1310
1311 static struct input_dev *wacom_allocate_input(struct wacom *wacom)
1312 {
1313         struct input_dev *input_dev;
1314         struct hid_device *hdev = wacom->hdev;
1315         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1316
1317         input_dev = input_allocate_device();
1318         if (!input_dev)
1319                 return NULL;
1320
1321         input_dev->name = wacom_wac->features.name;
1322         input_dev->phys = hdev->phys;
1323         input_dev->dev.parent = &hdev->dev;
1324         input_dev->open = wacom_open;
1325         input_dev->close = wacom_close;
1326         input_dev->uniq = hdev->uniq;
1327         input_dev->id.bustype = hdev->bus;
1328         input_dev->id.vendor  = hdev->vendor;
1329         input_dev->id.product = wacom_wac->pid ? wacom_wac->pid : hdev->product;
1330         input_dev->id.version = hdev->version;
1331         input_set_drvdata(input_dev, wacom);
1332
1333         return input_dev;
1334 }
1335
1336 static void wacom_clean_inputs(struct wacom *wacom)
1337 {
1338         if (wacom->wacom_wac.pen_input) {
1339                 if (wacom->wacom_wac.pen_registered)
1340                         input_unregister_device(wacom->wacom_wac.pen_input);
1341                 else
1342                         input_free_device(wacom->wacom_wac.pen_input);
1343         }
1344         if (wacom->wacom_wac.touch_input) {
1345                 if (wacom->wacom_wac.touch_registered)
1346                         input_unregister_device(wacom->wacom_wac.touch_input);
1347                 else
1348                         input_free_device(wacom->wacom_wac.touch_input);
1349         }
1350         if (wacom->wacom_wac.pad_input) {
1351                 if (wacom->wacom_wac.pad_registered)
1352                         input_unregister_device(wacom->wacom_wac.pad_input);
1353                 else
1354                         input_free_device(wacom->wacom_wac.pad_input);
1355         }
1356         kobject_put(wacom->remote_dir);
1357         wacom->wacom_wac.pen_input = NULL;
1358         wacom->wacom_wac.touch_input = NULL;
1359         wacom->wacom_wac.pad_input = NULL;
1360         wacom_destroy_leds(wacom);
1361 }
1362
1363 static int wacom_allocate_inputs(struct wacom *wacom)
1364 {
1365         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1366
1367         wacom_wac->pen_input = wacom_allocate_input(wacom);
1368         wacom_wac->touch_input = wacom_allocate_input(wacom);
1369         wacom_wac->pad_input = wacom_allocate_input(wacom);
1370         if (!wacom_wac->pen_input || !wacom_wac->touch_input || !wacom_wac->pad_input) {
1371                 wacom_clean_inputs(wacom);
1372                 return -ENOMEM;
1373         }
1374
1375         wacom_wac->pen_input->name = wacom_wac->pen_name;
1376         wacom_wac->touch_input->name = wacom_wac->touch_name;
1377         wacom_wac->pad_input->name = wacom_wac->pad_name;
1378
1379         return 0;
1380 }
1381
1382 static int wacom_register_inputs(struct wacom *wacom)
1383 {
1384         struct input_dev *pen_input_dev, *touch_input_dev, *pad_input_dev;
1385         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1386         int error = 0;
1387
1388         pen_input_dev = wacom_wac->pen_input;
1389         touch_input_dev = wacom_wac->touch_input;
1390         pad_input_dev = wacom_wac->pad_input;
1391
1392         if (!pen_input_dev || !touch_input_dev || !pad_input_dev)
1393                 return -EINVAL;
1394
1395         error = wacom_setup_pen_input_capabilities(pen_input_dev, wacom_wac);
1396         if (error) {
1397                 /* no pen in use on this interface */
1398                 input_free_device(pen_input_dev);
1399                 wacom_wac->pen_input = NULL;
1400                 pen_input_dev = NULL;
1401         } else {
1402                 error = input_register_device(pen_input_dev);
1403                 if (error)
1404                         goto fail_register_pen_input;
1405                 wacom_wac->pen_registered = true;
1406         }
1407
1408         error = wacom_setup_touch_input_capabilities(touch_input_dev, wacom_wac);
1409         if (error) {
1410                 /* no touch in use on this interface */
1411                 input_free_device(touch_input_dev);
1412                 wacom_wac->touch_input = NULL;
1413                 touch_input_dev = NULL;
1414         } else {
1415                 error = input_register_device(touch_input_dev);
1416                 if (error)
1417                         goto fail_register_touch_input;
1418                 wacom_wac->touch_registered = true;
1419         }
1420
1421         error = wacom_setup_pad_input_capabilities(pad_input_dev, wacom_wac);
1422         if (error) {
1423                 /* no pad in use on this interface */
1424                 input_free_device(pad_input_dev);
1425                 wacom_wac->pad_input = NULL;
1426                 pad_input_dev = NULL;
1427         } else {
1428                 error = input_register_device(pad_input_dev);
1429                 if (error)
1430                         goto fail_register_pad_input;
1431                 wacom_wac->pad_registered = true;
1432
1433                 error = wacom_initialize_leds(wacom);
1434                 if (error)
1435                         goto fail_leds;
1436
1437                 error = wacom_initialize_remote(wacom);
1438                 if (error)
1439                         goto fail_remote;
1440         }
1441
1442         return 0;
1443
1444 fail_remote:
1445         wacom_destroy_leds(wacom);
1446 fail_leds:
1447         input_unregister_device(pad_input_dev);
1448         pad_input_dev = NULL;
1449         wacom_wac->pad_registered = false;
1450 fail_register_pad_input:
1451         if (touch_input_dev)
1452                 input_unregister_device(touch_input_dev);
1453         wacom_wac->touch_input = NULL;
1454         wacom_wac->touch_registered = false;
1455 fail_register_touch_input:
1456         if (pen_input_dev)
1457                 input_unregister_device(pen_input_dev);
1458         wacom_wac->pen_input = NULL;
1459         wacom_wac->pen_registered = false;
1460 fail_register_pen_input:
1461         return error;
1462 }
1463
1464 /*
1465  * Not all devices report physical dimensions from HID.
1466  * Compute the default from hardcoded logical dimension
1467  * and resolution before driver overwrites them.
1468  */
1469 static void wacom_set_default_phy(struct wacom_features *features)
1470 {
1471         if (features->x_resolution) {
1472                 features->x_phy = (features->x_max * 100) /
1473                                         features->x_resolution;
1474                 features->y_phy = (features->y_max * 100) /
1475                                         features->y_resolution;
1476         }
1477 }
1478
1479 static void wacom_calculate_res(struct wacom_features *features)
1480 {
1481         /* set unit to "100th of a mm" for devices not reported by HID */
1482         if (!features->unit) {
1483                 features->unit = 0x11;
1484                 features->unitExpo = -3;
1485         }
1486
1487         features->x_resolution = wacom_calc_hid_res(features->x_max,
1488                                                     features->x_phy,
1489                                                     features->unit,
1490                                                     features->unitExpo);
1491         features->y_resolution = wacom_calc_hid_res(features->y_max,
1492                                                     features->y_phy,
1493                                                     features->unit,
1494                                                     features->unitExpo);
1495 }
1496
1497 static void wacom_wireless_work(struct work_struct *work)
1498 {
1499         struct wacom *wacom = container_of(work, struct wacom, work);
1500         struct usb_device *usbdev = wacom->usbdev;
1501         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1502         struct hid_device *hdev1, *hdev2;
1503         struct wacom *wacom1, *wacom2;
1504         struct wacom_wac *wacom_wac1, *wacom_wac2;
1505         int error;
1506
1507         /*
1508          * Regardless if this is a disconnect or a new tablet,
1509          * remove any existing input and battery devices.
1510          */
1511
1512         wacom_destroy_battery(wacom);
1513
1514         /* Stylus interface */
1515         hdev1 = usb_get_intfdata(usbdev->config->interface[1]);
1516         wacom1 = hid_get_drvdata(hdev1);
1517         wacom_wac1 = &(wacom1->wacom_wac);
1518         wacom_clean_inputs(wacom1);
1519
1520         /* Touch interface */
1521         hdev2 = usb_get_intfdata(usbdev->config->interface[2]);
1522         wacom2 = hid_get_drvdata(hdev2);
1523         wacom_wac2 = &(wacom2->wacom_wac);
1524         wacom_clean_inputs(wacom2);
1525
1526         if (wacom_wac->pid == 0) {
1527                 hid_info(wacom->hdev, "wireless tablet disconnected\n");
1528                 wacom_wac1->shared->type = 0;
1529         } else {
1530                 const struct hid_device_id *id = wacom_ids;
1531
1532                 hid_info(wacom->hdev, "wireless tablet connected with PID %x\n",
1533                          wacom_wac->pid);
1534
1535                 while (id->bus) {
1536                         if (id->vendor == USB_VENDOR_ID_WACOM &&
1537                             id->product == wacom_wac->pid)
1538                                 break;
1539                         id++;
1540                 }
1541
1542                 if (!id->bus) {
1543                         hid_info(wacom->hdev, "ignoring unknown PID.\n");
1544                         return;
1545                 }
1546
1547                 /* Stylus interface */
1548                 wacom_wac1->features =
1549                         *((struct wacom_features *)id->driver_data);
1550                 wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PEN;
1551                 wacom_set_default_phy(&wacom_wac1->features);
1552                 wacom_calculate_res(&wacom_wac1->features);
1553                 snprintf(wacom_wac1->pen_name, WACOM_NAME_MAX, "%s (WL) Pen",
1554                          wacom_wac1->features.name);
1555                 if (wacom_wac1->features.type < BAMBOO_PEN ||
1556                     wacom_wac1->features.type > BAMBOO_PT) {
1557                         snprintf(wacom_wac1->pad_name, WACOM_NAME_MAX, "%s (WL) Pad",
1558                                  wacom_wac1->features.name);
1559                         wacom_wac1->features.device_type |= WACOM_DEVICETYPE_PAD;
1560                 }
1561                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1562                 wacom_wac1->shared->type = wacom_wac1->features.type;
1563                 wacom_wac1->pid = wacom_wac->pid;
1564                 error = wacom_allocate_inputs(wacom1) ||
1565                         wacom_register_inputs(wacom1);
1566                 if (error)
1567                         goto fail;
1568
1569                 /* Touch interface */
1570                 if (wacom_wac1->features.touch_max ||
1571                     (wacom_wac1->features.type >= INTUOSHT &&
1572                     wacom_wac1->features.type <= BAMBOO_PT)) {
1573                         wacom_wac2->features =
1574                                 *((struct wacom_features *)id->driver_data);
1575                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1576                         wacom_set_default_phy(&wacom_wac2->features);
1577                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1578                         wacom_calculate_res(&wacom_wac2->features);
1579                         snprintf(wacom_wac2->touch_name, WACOM_NAME_MAX,
1580                                  "%s (WL) Finger",wacom_wac2->features.name);
1581                         if (wacom_wac1->features.touch_max)
1582                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_TOUCH;
1583                         if (wacom_wac1->features.type >= INTUOSHT &&
1584                             wacom_wac1->features.type <= BAMBOO_PT) {
1585                                 snprintf(wacom_wac2->pad_name, WACOM_NAME_MAX,
1586                                          "%s (WL) Pad",wacom_wac2->features.name);
1587                                 wacom_wac2->features.device_type |= WACOM_DEVICETYPE_PAD;
1588                         }
1589                         wacom_wac2->pid = wacom_wac->pid;
1590                         error = wacom_allocate_inputs(wacom2) ||
1591                                 wacom_register_inputs(wacom2);
1592                         if (error)
1593                                 goto fail;
1594
1595                         if ((wacom_wac1->features.type == INTUOSHT ||
1596                             wacom_wac1->features.type == INTUOSHT2) &&
1597                             wacom_wac1->features.touch_max)
1598                                 wacom_wac->shared->touch_input = wacom_wac2->touch_input;
1599                 }
1600
1601                 error = wacom_initialize_battery(wacom);
1602                 if (error)
1603                         goto fail;
1604         }
1605
1606         return;
1607
1608 fail:
1609         wacom_clean_inputs(wacom1);
1610         wacom_clean_inputs(wacom2);
1611         return;
1612 }
1613
1614 void wacom_battery_work(struct work_struct *work)
1615 {
1616         struct wacom *wacom = container_of(work, struct wacom, work);
1617
1618         if ((wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1619              !wacom->battery) {
1620                 wacom_initialize_battery(wacom);
1621         }
1622         else if (!(wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) &&
1623                  wacom->battery) {
1624                 wacom_destroy_battery(wacom);
1625         }
1626 }
1627
1628 static size_t wacom_compute_pktlen(struct hid_device *hdev)
1629 {
1630         struct hid_report_enum *report_enum;
1631         struct hid_report *report;
1632         size_t size = 0;
1633
1634         report_enum = hdev->report_enum + HID_INPUT_REPORT;
1635
1636         list_for_each_entry(report, &report_enum->report_list, list) {
1637                 size_t report_size = hid_report_len(report);
1638                 if (report_size > size)
1639                         size = report_size;
1640         }
1641
1642         return size;
1643 }
1644
1645 static void wacom_update_name(struct wacom *wacom)
1646 {
1647         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1648         struct wacom_features *features = &wacom_wac->features;
1649         char name[WACOM_NAME_MAX];
1650
1651         /* Generic devices name unspecified */
1652         if ((features->type == HID_GENERIC) && !strcmp("Wacom HID", features->name)) {
1653                 if (strstr(wacom->hdev->name, "Wacom") ||
1654                     strstr(wacom->hdev->name, "wacom") ||
1655                     strstr(wacom->hdev->name, "WACOM")) {
1656                         /* name is in HID descriptor, use it */
1657                         strlcpy(name, wacom->hdev->name, sizeof(name));
1658
1659                         /* strip out excess whitespaces */
1660                         while (1) {
1661                                 char *gap = strstr(name, "  ");
1662                                 if (gap == NULL)
1663                                         break;
1664                                 /* shift everything including the terminator */
1665                                 memmove(gap, gap+1, strlen(gap));
1666                         }
1667                         /* get rid of trailing whitespace */
1668                         if (name[strlen(name)-1] == ' ')
1669                                 name[strlen(name)-1] = '\0';
1670                 } else {
1671                         /* no meaningful name retrieved. use product ID */
1672                         snprintf(name, sizeof(name),
1673                                  "%s %X", features->name, wacom->hdev->product);
1674                 }
1675         } else {
1676                 strlcpy(name, features->name, sizeof(name));
1677         }
1678
1679         /* Append the device type to the name */
1680         snprintf(wacom_wac->pen_name, sizeof(wacom_wac->pen_name),
1681                 "%s Pen", name);
1682         snprintf(wacom_wac->touch_name, sizeof(wacom_wac->touch_name),
1683                 "%s Finger", name);
1684         snprintf(wacom_wac->pad_name, sizeof(wacom_wac->pad_name),
1685                 "%s Pad", name);
1686 }
1687
1688 static int wacom_probe(struct hid_device *hdev,
1689                 const struct hid_device_id *id)
1690 {
1691         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
1692         struct usb_device *dev = interface_to_usbdev(intf);
1693         struct wacom *wacom;
1694         struct wacom_wac *wacom_wac;
1695         struct wacom_features *features;
1696         int error;
1697         unsigned int connect_mask = HID_CONNECT_HIDRAW;
1698
1699         if (!id->driver_data)
1700                 return -EINVAL;
1701
1702         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1703
1704         /* hid-core sets this quirk for the boot interface */
1705         hdev->quirks &= ~HID_QUIRK_NOGET;
1706
1707         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1708         if (!wacom)
1709                 return -ENOMEM;
1710
1711         hid_set_drvdata(hdev, wacom);
1712         wacom->hdev = hdev;
1713
1714         /* ask for the report descriptor to be loaded by HID */
1715         error = hid_parse(hdev);
1716         if (error) {
1717                 hid_err(hdev, "parse failed\n");
1718                 goto fail_parse;
1719         }
1720
1721         wacom_wac = &wacom->wacom_wac;
1722         wacom_wac->features = *((struct wacom_features *)id->driver_data);
1723         features = &wacom_wac->features;
1724         features->pktlen = wacom_compute_pktlen(hdev);
1725         if (features->pktlen > WACOM_PKGLEN_MAX) {
1726                 error = -EINVAL;
1727                 goto fail_pktlen;
1728         }
1729
1730         if (features->check_for_hid_type && features->hid_type != hdev->type) {
1731                 error = -ENODEV;
1732                 goto fail_type;
1733         }
1734
1735         wacom->usbdev = dev;
1736         wacom->intf = intf;
1737         mutex_init(&wacom->lock);
1738         INIT_WORK(&wacom->work, wacom_wireless_work);
1739
1740         error = wacom_allocate_inputs(wacom);
1741         if (error)
1742                 goto fail_allocate_inputs;
1743
1744         /*
1745          * Bamboo Pad has a generic hid handling for the Pen, and we switch it
1746          * into debug mode for the touch part.
1747          * We ignore the other interfaces.
1748          */
1749         if (features->type == BAMBOO_PAD) {
1750                 if (features->pktlen == WACOM_PKGLEN_PENABLED) {
1751                         features->type = HID_GENERIC;
1752                 } else if ((features->pktlen != WACOM_PKGLEN_BPAD_TOUCH) &&
1753                            (features->pktlen != WACOM_PKGLEN_BPAD_TOUCH_USB)) {
1754                         error = -ENODEV;
1755                         goto fail_shared_data;
1756                 }
1757         }
1758
1759         /* set the default size in case we do not get them from hid */
1760         wacom_set_default_phy(features);
1761
1762         /* Retrieve the physical and logical size for touch devices */
1763         wacom_retrieve_hid_descriptor(hdev, features);
1764         wacom_setup_device_quirks(wacom);
1765
1766         if (features->device_type == WACOM_DEVICETYPE_NONE &&
1767             features->type != WIRELESS) {
1768                 error = features->type == HID_GENERIC ? -ENODEV : 0;
1769
1770                 dev_warn(&hdev->dev, "Unknown device_type for '%s'. %s.",
1771                          hdev->name,
1772                          error ? "Ignoring" : "Assuming pen");
1773
1774                 if (error)
1775                         goto fail_shared_data;
1776
1777                 features->device_type |= WACOM_DEVICETYPE_PEN;
1778         }
1779
1780         wacom_calculate_res(features);
1781
1782         wacom_update_name(wacom);
1783
1784         error = wacom_add_shared_data(hdev);
1785         if (error)
1786                 goto fail_shared_data;
1787
1788         if (!(features->device_type & WACOM_DEVICETYPE_WL_MONITOR) &&
1789              (features->quirks & WACOM_QUIRK_BATTERY)) {
1790                 error = wacom_initialize_battery(wacom);
1791                 if (error)
1792                         goto fail_battery;
1793         }
1794
1795         error = wacom_register_inputs(wacom);
1796         if (error)
1797                 goto fail_register_inputs;
1798
1799         if (hdev->bus == BUS_BLUETOOTH) {
1800                 error = device_create_file(&hdev->dev, &dev_attr_speed);
1801                 if (error)
1802                         hid_warn(hdev,
1803                                  "can't create sysfs speed attribute err: %d\n",
1804                                  error);
1805         }
1806
1807         if (features->type == HID_GENERIC)
1808                 connect_mask |= HID_CONNECT_DRIVER;
1809
1810         /* Regular HID work starts now */
1811         error = hid_hw_start(hdev, connect_mask);
1812         if (error) {
1813                 hid_err(hdev, "hw start failed\n");
1814                 goto fail_hw_start;
1815         }
1816
1817         /* Note that if query fails it is not a hard failure */
1818         wacom_query_tablet_data(hdev, features);
1819
1820         /* touch only Bamboo doesn't support pen */
1821         if ((features->type == BAMBOO_TOUCH) &&
1822             (features->device_type & WACOM_DEVICETYPE_PEN)) {
1823                 error = -ENODEV;
1824                 goto fail_hw_start;
1825         }
1826
1827         /* pen only Bamboo neither support touch nor pad */
1828         if ((features->type == BAMBOO_PEN) &&
1829             ((features->device_type & WACOM_DEVICETYPE_TOUCH) ||
1830             (features->device_type & WACOM_DEVICETYPE_PAD))) {
1831                 error = -ENODEV;
1832                 goto fail_hw_start;
1833         }
1834
1835         if (features->device_type & WACOM_DEVICETYPE_WL_MONITOR)
1836                 error = hid_hw_open(hdev);
1837
1838         if ((wacom_wac->features.type == INTUOSHT ||
1839             wacom_wac->features.type == INTUOSHT2) &&
1840             (wacom_wac->features.device_type & WACOM_DEVICETYPE_TOUCH)) {
1841                         wacom_wac->shared->touch_input = wacom_wac->touch_input;
1842         }
1843
1844         return 0;
1845
1846 fail_hw_start:
1847         if (hdev->bus == BUS_BLUETOOTH)
1848                 device_remove_file(&hdev->dev, &dev_attr_speed);
1849 fail_register_inputs:
1850         wacom_clean_inputs(wacom);
1851         wacom_destroy_battery(wacom);
1852 fail_battery:
1853         wacom_remove_shared_data(wacom);
1854 fail_shared_data:
1855         wacom_clean_inputs(wacom);
1856 fail_allocate_inputs:
1857 fail_type:
1858 fail_pktlen:
1859 fail_parse:
1860         kfree(wacom);
1861         hid_set_drvdata(hdev, NULL);
1862         return error;
1863 }
1864
1865 static void wacom_remove(struct hid_device *hdev)
1866 {
1867         struct wacom *wacom = hid_get_drvdata(hdev);
1868
1869         hid_hw_stop(hdev);
1870
1871         cancel_work_sync(&wacom->work);
1872         wacom_clean_inputs(wacom);
1873         if (hdev->bus == BUS_BLUETOOTH)
1874                 device_remove_file(&hdev->dev, &dev_attr_speed);
1875         wacom_destroy_battery(wacom);
1876         wacom_remove_shared_data(wacom);
1877
1878         hid_set_drvdata(hdev, NULL);
1879         kfree(wacom);
1880 }
1881
1882 #ifdef CONFIG_PM
1883 static int wacom_resume(struct hid_device *hdev)
1884 {
1885         struct wacom *wacom = hid_get_drvdata(hdev);
1886         struct wacom_features *features = &wacom->wacom_wac.features;
1887
1888         mutex_lock(&wacom->lock);
1889
1890         /* switch to wacom mode first */
1891         wacom_query_tablet_data(hdev, features);
1892         wacom_led_control(wacom);
1893
1894         mutex_unlock(&wacom->lock);
1895
1896         return 0;
1897 }
1898
1899 static int wacom_reset_resume(struct hid_device *hdev)
1900 {
1901         return wacom_resume(hdev);
1902 }
1903 #endif /* CONFIG_PM */
1904
1905 static struct hid_driver wacom_driver = {
1906         .name =         "wacom",
1907         .id_table =     wacom_ids,
1908         .probe =        wacom_probe,
1909         .remove =       wacom_remove,
1910         .report =       wacom_wac_report,
1911 #ifdef CONFIG_PM
1912         .resume =       wacom_resume,
1913         .reset_resume = wacom_reset_resume,
1914 #endif
1915         .raw_event =    wacom_raw_event,
1916 };
1917 module_hid_driver(wacom_driver);
1918
1919 MODULE_VERSION(DRIVER_VERSION);
1920 MODULE_AUTHOR(DRIVER_AUTHOR);
1921 MODULE_DESCRIPTION(DRIVER_DESC);
1922 MODULE_LICENSE(DRIVER_LICENSE);