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