drivers/input/tablet/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
  17 /* defines to get HID report descriptor */
  18 #define HID_DEVICET_HID         (USB_TYPE_CLASS | 0x01)
  19 #define HID_DEVICET_REPORT      (USB_TYPE_CLASS | 0x02)
  20 #define HID_USAGE_UNDEFINED             0x00
  21 #define HID_USAGE_PAGE                  0x05
  22 #define HID_USAGE_PAGE_DIGITIZER        0x0d
  23 #define HID_USAGE_PAGE_DESKTOP          0x01
  24 #define HID_USAGE                       0x09
  25 #define HID_USAGE_X                     ((HID_USAGE_PAGE_DESKTOP << 16) | 0x30)
  26 #define HID_USAGE_Y                     ((HID_USAGE_PAGE_DESKTOP << 16) | 0x31)
  27 #define HID_USAGE_PRESSURE              ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x30)
  28 #define HID_USAGE_X_TILT                ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x3d)
  29 #define HID_USAGE_Y_TILT                ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x3e)
  30 #define HID_USAGE_FINGER                ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x22)
  31 #define HID_USAGE_STYLUS                ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x20)
  32 #define HID_USAGE_CONTACTMAX            ((HID_USAGE_PAGE_DIGITIZER << 16) | 0x55)
  33 #define HID_COLLECTION                  0xa1
  34 #define HID_COLLECTION_LOGICAL          0x02
  35 #define HID_COLLECTION_END              0xc0
  36
  37 struct hid_descriptor {
  38         struct usb_descriptor_header header;
  39         __le16   bcdHID;
  40         u8       bCountryCode;
  41         u8       bNumDescriptors;
  42         u8       bDescriptorType;
  43         __le16   wDescriptorLength;
  44 } __attribute__ ((packed));
  45
  46 /* defines to get/set USB message */
  47 #define USB_REQ_GET_REPORT      0x01
  48 #define USB_REQ_SET_REPORT      0x09
  49
  50 #define WAC_HID_FEATURE_REPORT  0x03
  51 #define WAC_MSG_RETRIES         5
  52
  53 #define WAC_CMD_LED_CONTROL     0x20
  54 #define WAC_CMD_ICON_START      0x21
  55 #define WAC_CMD_ICON_XFER       0x23
  56 #define WAC_CMD_RETRIES         10
  57
  58 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
  59                             void *buf, size_t size, unsigned int retries)
  60 {
  61         struct usb_device *dev = interface_to_usbdev(intf);
  62         int retval;
  63
  64         do {
  65                 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  66                                 USB_REQ_GET_REPORT,
  67                                 USB_DIR_IN | USB_TYPE_CLASS |
  68                                 USB_RECIP_INTERFACE,
  69                                 (type << 8) + id,
  70                                 intf->altsetting[0].desc.bInterfaceNumber,
  71                                 buf, size, 100);
  72         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  73
  74         return retval;
  75 }
  76
  77 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
  78                             void *buf, size_t size, unsigned int retries)
  79 {
  80         struct usb_device *dev = interface_to_usbdev(intf);
  81         int retval;
  82
  83         do {
  84                 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  85                                 USB_REQ_SET_REPORT,
  86                                 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  87                                 (type << 8) + id,
  88                                 intf->altsetting[0].desc.bInterfaceNumber,
  89                                 buf, size, 1000);
  90         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  91
  92         return retval;
  93 }
  94
  95 static void wacom_sys_irq(struct urb *urb)
  96 {
  97         struct wacom *wacom = urb->context;
  98         struct device *dev = &wacom->intf->dev;
  99         int retval;
 100
 101         switch (urb->status) {
 102         case 0:
 103                 /* success */
 104                 break;
 105         case -ECONNRESET:
 106         case -ENOENT:
 107         case -ESHUTDOWN:
 108                 /* this urb is terminated, clean up */
 109                 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
 110                         __func__, urb->status);
 111                 return;
 112         default:
 113                 dev_dbg(dev, "%s - nonzero urb status received: %d\n",
 114                         __func__, urb->status);
 115                 goto exit;
 116         }
 117
 118         wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
 119
 120  exit:
 121         usb_mark_last_busy(wacom->usbdev);
 122         retval = usb_submit_urb(urb, GFP_ATOMIC);
 123         if (retval)
 124                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
 125                         __func__, retval);
 126 }
 127
 128 static int wacom_open(struct input_dev *dev)
 129 {
 130         struct wacom *wacom = input_get_drvdata(dev);
 131         int retval = 0;
 132
 133         if (usb_autopm_get_interface(wacom->intf) < 0)
 134                 return -EIO;
 135
 136         mutex_lock(&wacom->lock);
 137
 138         if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
 139                 retval = -EIO;
 140                 goto out;
 141         }
 142
 143         wacom->open = true;
 144         wacom->intf->needs_remote_wakeup = 1;
 145
 146 out:
 147         mutex_unlock(&wacom->lock);
 148         usb_autopm_put_interface(wacom->intf);
 149         return retval;
 150 }
 151
 152 static void wacom_close(struct input_dev *dev)
 153 {
 154         struct wacom *wacom = input_get_drvdata(dev);
 155         int autopm_error;
 156
 157         autopm_error = usb_autopm_get_interface(wacom->intf);
 158
 159         mutex_lock(&wacom->lock);
 160         usb_kill_urb(wacom->irq);
 161         wacom->open = false;
 162         wacom->intf->needs_remote_wakeup = 0;
 163         mutex_unlock(&wacom->lock);
 164
 165         if (!autopm_error)
 166                 usb_autopm_put_interface(wacom->intf);
 167 }
 168
 169 /*
 170  * Calculate the resolution of the X or Y axis, given appropriate HID data.
 171  * This function is little more than hidinput_calc_abs_res stripped down.
 172  */
 173 static int wacom_calc_hid_res(int logical_extents, int physical_extents,
 174                               unsigned char unit, unsigned char exponent)
 175 {
 176         int prev, unit_exponent;
 177
 178         /* Check if the extents are sane */
 179         if (logical_extents <= 0 || physical_extents <= 0)
 180                 return 0;
 181
 182         /* Get signed value of nybble-sized twos-compliment exponent */
 183         unit_exponent = exponent;
 184         if (unit_exponent > 7)
 185                 unit_exponent -= 16;
 186
 187         /* Convert physical_extents to millimeters */
 188         if (unit == 0x11) {             /* If centimeters */
 189                 unit_exponent += 1;
 190         } else if (unit == 0x13) {      /* If inches */
 191                 prev = physical_extents;
 192                 physical_extents *= 254;
 193                 if (physical_extents < prev)
 194                         return 0;
 195                 unit_exponent -= 1;
 196         } else {
 197                 return 0;
 198         }
 199
 200         /* Apply negative unit exponent */
 201         for (; unit_exponent < 0; unit_exponent++) {
 202                 prev = logical_extents;
 203                 logical_extents *= 10;
 204                 if (logical_extents < prev)
 205                         return 0;
 206         }
 207         /* Apply positive unit exponent */
 208         for (; unit_exponent > 0; unit_exponent--) {
 209                 prev = physical_extents;
 210                 physical_extents *= 10;
 211                 if (physical_extents < prev)
 212                         return 0;
 213         }
 214
 215         /* Calculate resolution */
 216         return logical_extents / physical_extents;
 217 }
 218
 219 static int wacom_parse_logical_collection(unsigned char *report,
 220                                           struct wacom_features *features)
 221 {
 222         int length = 0;
 223
 224         if (features->type == BAMBOO_PT) {
 225
 226                 /* Logical collection is only used by 3rd gen Bamboo Touch */
 227                 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 228                 features->device_type = BTN_TOOL_FINGER;
 229
 230                 features->x_max = features->y_max =
 231                         get_unaligned_le16(&report[10]);
 232
 233                 length = 11;
 234         }
 235         return length;
 236 }
 237
 238 static void wacom_retrieve_report_data(struct usb_interface *intf,
 239                                        struct wacom_features *features)
 240 {
 241         int result = 0;
 242         unsigned char *rep_data;
 243
 244         rep_data = kmalloc(2, GFP_KERNEL);
 245         if (rep_data) {
 246
 247                 rep_data[0] = 12;
 248                 result = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
 249                                           rep_data[0], rep_data, 2,
 250                                           WAC_MSG_RETRIES);
 251
 252                 if (result >= 0 && rep_data[1] > 2)
 253                         features->touch_max = rep_data[1];
 254
 255                 kfree(rep_data);
 256         }
 257 }
 258
 259 /*
 260  * Interface Descriptor of wacom devices can be incomplete and
 261  * inconsistent so wacom_features table is used to store stylus
 262  * device's packet lengths, various maximum values, and tablet
 263  * resolution based on product ID's.
 264  *
 265  * For devices that contain 2 interfaces, wacom_features table is
 266  * inaccurate for the touch interface.  Since the Interface Descriptor
 267  * for touch interfaces has pretty complete data, this function exists
 268  * to query tablet for this missing information instead of hard coding in
 269  * an additional table.
 270  *
 271  * A typical Interface Descriptor for a stylus will contain a
 272  * boot mouse application collection that is not of interest and this
 273  * function will ignore it.
 274  *
 275  * It also contains a digitizer application collection that also is not
 276  * of interest since any information it contains would be duplicate
 277  * of what is in wacom_features. Usually it defines a report of an array
 278  * of bytes that could be used as max length of the stylus packet returned.
 279  * If it happens to define a Digitizer-Stylus Physical Collection then
 280  * the X and Y logical values contain valid data but it is ignored.
 281  *
 282  * A typical Interface Descriptor for a touch interface will contain a
 283  * Digitizer-Finger Physical Collection which will define both logical
 284  * X/Y maximum as well as the physical size of tablet. Since touch
 285  * interfaces haven't supported pressure or distance, this is enough
 286  * information to override invalid values in the wacom_features table.
 287  *
 288  * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
 289  * Collection. Instead they define a Logical Collection with a single
 290  * Logical Maximum for both X and Y.
 291  *
 292  * Intuos5 touch interface does not contain useful data. We deal with
 293  * this after returning from this function.
 294  */
 295 static int wacom_parse_hid(struct usb_interface *intf,
 296                            struct hid_descriptor *hid_desc,
 297                            struct wacom_features *features)
 298 {
 299         struct usb_device *dev = interface_to_usbdev(intf);
 300         char limit = 0;
 301         /* result has to be defined as int for some devices */
 302         int result = 0, touch_max = 0;
 303         int i = 0, page = 0, finger = 0, pen = 0;
 304         unsigned char *report;
 305
 306         report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
 307         if (!report)
 308                 return -ENOMEM;
 309
 310         /* retrive report descriptors */
 311         do {
 312                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 313                         USB_REQ_GET_DESCRIPTOR,
 314                         USB_RECIP_INTERFACE | USB_DIR_IN,
 315                         HID_DEVICET_REPORT << 8,
 316                         intf->altsetting[0].desc.bInterfaceNumber, /* interface */
 317                         report,
 318                         hid_desc->wDescriptorLength,
 319                         5000); /* 5 secs */
 320         } while (result < 0 && limit++ < WAC_MSG_RETRIES);
 321
 322         /* No need to parse the Descriptor. It isn't an error though */
 323         if (result < 0)
 324                 goto out;
 325
 326         for (i = 0; i < hid_desc->wDescriptorLength; i++) {
 327
 328                 switch (report[i]) {
 329                 case HID_USAGE_PAGE:
 330                         page = report[i + 1];
 331                         i++;
 332                         break;
 333
 334                 case HID_USAGE:
 335                         switch (page << 16 | report[i + 1]) {
 336                         case HID_USAGE_X:
 337                                 if (finger) {
 338                                         features->device_type = BTN_TOOL_FINGER;
 339                                         /* touch device at least supports one touch point */
 340                                         touch_max = 1;
 341                                         switch (features->type) {
 342                                         case TABLETPC2FG:
 343                                                 features->pktlen = WACOM_PKGLEN_TPC2FG;
 344                                                 break;
 345
 346                                         case MTSCREEN:
 347                                         case WACOM_24HDT:
 348                                                 features->pktlen = WACOM_PKGLEN_MTOUCH;
 349                                                 break;
 350
 351                                         case MTTPC:
 352                                                 features->pktlen = WACOM_PKGLEN_MTTPC;
 353                                                 break;
 354
 355                                         case BAMBOO_PT:
 356                                                 features->pktlen = WACOM_PKGLEN_BBTOUCH;
 357                                                 break;
 358
 359                                         default:
 360                                                 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 361                                                 break;
 362                                         }
 363
 364                                         switch (features->type) {
 365                                         case BAMBOO_PT:
 366                                                 features->x_phy =
 367                                                         get_unaligned_le16(&report[i + 5]);
 368                                                 features->x_max =
 369                                                         get_unaligned_le16(&report[i + 8]);
 370                                                 i += 15;
 371                                                 break;
 372
 373                                         case WACOM_24HDT:
 374                                                 features->x_max =
 375                                                         get_unaligned_le16(&report[i + 3]);
 376                                                 features->x_phy =
 377                                                         get_unaligned_le16(&report[i + 8]);
 378                                                 features->unit = report[i - 1];
 379                                                 features->unitExpo = report[i - 3];
 380                                                 i += 12;
 381                                                 break;
 382
 383                                         default:
 384                                                 features->x_max =
 385                                                         get_unaligned_le16(&report[i + 3]);
 386                                                 features->x_phy =
 387                                                         get_unaligned_le16(&report[i + 6]);
 388                                                 features->unit = report[i + 9];
 389                                                 features->unitExpo = report[i + 11];
 390                                                 i += 12;
 391                                                 break;
 392                                         }
 393                                 } else if (pen) {
 394                                         /* penabled only accepts exact bytes of data */
 395                                         if (features->type >= TABLETPC)
 396                                                 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 397                                         features->device_type = BTN_TOOL_PEN;
 398                                         features->x_max =
 399                                                 get_unaligned_le16(&report[i + 3]);
 400                                         i += 4;
 401                                 }
 402                                 break;
 403
 404                         case HID_USAGE_Y:
 405                                 if (finger) {
 406                                         switch (features->type) {
 407                                         case TABLETPC2FG:
 408                                         case MTSCREEN:
 409                                         case MTTPC:
 410                                                 features->y_max =
 411                                                         get_unaligned_le16(&report[i + 3]);
 412                                                 features->y_phy =
 413                                                         get_unaligned_le16(&report[i + 6]);
 414                                                 i += 7;
 415                                                 break;
 416
 417                                         case WACOM_24HDT:
 418                                                 features->y_max =
 419                                                         get_unaligned_le16(&report[i + 3]);
 420                                                 features->y_phy =
 421                                                         get_unaligned_le16(&report[i - 2]);
 422                                                 i += 7;
 423                                                 break;
 424
 425                                         case BAMBOO_PT:
 426                                                 features->y_phy =
 427                                                         get_unaligned_le16(&report[i + 3]);
 428                                                 features->y_max =
 429                                                         get_unaligned_le16(&report[i + 6]);
 430                                                 i += 12;
 431                                                 break;
 432
 433                                         default:
 434                                                 features->y_max =
 435                                                         features->x_max;
 436                                                 features->y_phy =
 437                                                         get_unaligned_le16(&report[i + 3]);
 438                                                 i += 4;
 439                                                 break;
 440                                         }
 441                                 } else if (pen) {
 442                                         features->y_max =
 443                                                 get_unaligned_le16(&report[i + 3]);
 444                                         i += 4;
 445                                 }
 446                                 break;
 447
 448                         case HID_USAGE_FINGER:
 449                                 finger = 1;
 450                                 i++;
 451                                 break;
 452
 453                         /*
 454                          * Requiring Stylus Usage will ignore boot mouse
 455                          * X/Y values and some cases of invalid Digitizer X/Y
 456                          * values commonly reported.
 457                          */
 458                         case HID_USAGE_STYLUS:
 459                                 pen = 1;
 460                                 i++;
 461                                 break;
 462
 463                         case HID_USAGE_CONTACTMAX:
 464                                 /* leave touch_max as is if predefined */
 465                                 if (!features->touch_max)
 466                                         wacom_retrieve_report_data(intf, features);
 467                                 i++;
 468                                 break;
 469
 470                         case HID_USAGE_PRESSURE:
 471                                 if (pen) {
 472                                         features->pressure_max =
 473                                                 get_unaligned_le16(&report[i + 3]);
 474                                         i += 4;
 475                                 }
 476                                 break;
 477                         }
 478                         break;
 479
 480                 case HID_COLLECTION_END:
 481                         /* reset UsagePage and Finger */
 482                         finger = page = 0;
 483                         break;
 484
 485                 case HID_COLLECTION:
 486                         i++;
 487                         switch (report[i]) {
 488                         case HID_COLLECTION_LOGICAL:
 489                                 i += wacom_parse_logical_collection(&report[i],
 490                                                                     features);
 491                                 break;
 492                         }
 493                         break;
 494                 }
 495         }
 496
 497  out:
 498         if (!features->touch_max && touch_max)
 499                 features->touch_max = touch_max;
 500         result = 0;
 501         kfree(report);
 502         return result;
 503 }
 504
 505 static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
 506 {
 507         unsigned char *rep_data;
 508         int error = -ENOMEM, limit = 0;
 509
 510         rep_data = kzalloc(length, GFP_KERNEL);
 511         if (!rep_data)
 512                 return error;
 513
 514         do {
 515                 rep_data[0] = report_id;
 516                 rep_data[1] = mode;
 517
 518                 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 519                                          report_id, rep_data, length, 1);
 520         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 521
 522         kfree(rep_data);
 523
 524         return error < 0 ? error : 0;
 525 }
 526
 527 /*
 528  * Switch the tablet into its most-capable mode. Wacom tablets are
 529  * typically configured to power-up in a mode which sends mouse-like
 530  * reports to the OS. To get absolute position, pressure data, etc.
 531  * from the tablet, it is necessary to switch the tablet out of this
 532  * mode and into one which sends the full range of tablet data.
 533  */
 534 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 535 {
 536         if (features->device_type == BTN_TOOL_FINGER) {
 537                 if (features->type > TABLETPC) {
 538                         /* MT Tablet PC touch */
 539                         return wacom_set_device_mode(intf, 3, 4, 4);
 540                 }
 541                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 542                         return wacom_set_device_mode(intf, 18, 3, 2);
 543                 }
 544         } else if (features->device_type == BTN_TOOL_PEN) {
 545                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 546                         return wacom_set_device_mode(intf, 2, 2, 2);
 547                 }
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 554                                          struct wacom_features *features)
 555 {
 556         int error = 0;
 557         struct usb_host_interface *interface = intf->cur_altsetting;
 558         struct hid_descriptor *hid_desc;
 559
 560         /* default features */
 561         features->device_type = BTN_TOOL_PEN;
 562         features->x_fuzz = 4;
 563         features->y_fuzz = 4;
 564         features->pressure_fuzz = 0;
 565         features->distance_fuzz = 0;
 566
 567         /*
 568          * The wireless device HID is basic and layout conflicts with
 569          * other tablets (monitor and touch interface can look like pen).
 570          * Skip the query for this type and modify defaults based on
 571          * interface number.
 572          */
 573         if (features->type == WIRELESS) {
 574                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 575                         features->device_type = 0;
 576                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 577                         features->device_type = BTN_TOOL_FINGER;
 578                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 579                 }
 580         }
 581
 582         /* only devices that support touch need to retrieve the info */
 583         if (features->type < BAMBOO_PT) {
 584                 goto out;
 585         }
 586
 587         error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
 588         if (error) {
 589                 error = usb_get_extra_descriptor(&interface->endpoint[0],
 590                                                  HID_DEVICET_REPORT, &hid_desc);
 591                 if (error) {
 592                         dev_err(&intf->dev,
 593                                 "can not retrieve extra class descriptor\n");
 594                         goto out;
 595                 }
 596         }
 597         error = wacom_parse_hid(intf, hid_desc, features);
 598
 599  out:
 600         return error;
 601 }
 602
 603 struct wacom_usbdev_data {
 604         struct list_head list;
 605         struct kref kref;
 606         struct usb_device *dev;
 607         struct wacom_shared shared;
 608 };
 609
 610 static LIST_HEAD(wacom_udev_list);
 611 static DEFINE_MUTEX(wacom_udev_list_lock);
 612
 613 static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
 614 {
 615         int port1;
 616         struct usb_device *sibling;
 617
 618         if (vendor == 0 && product == 0)
 619                 return dev;
 620
 621         if (dev->parent == NULL)
 622                 return NULL;
 623
 624         usb_hub_for_each_child(dev->parent, port1, sibling) {
 625                 struct usb_device_descriptor *d;
 626                 if (sibling == NULL)
 627                         continue;
 628
 629                 d = &sibling->descriptor;
 630                 if (d->idVendor == vendor && d->idProduct == product)
 631                         return sibling;
 632         }
 633
 634         return NULL;
 635 }
 636
 637 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
 638 {
 639         struct wacom_usbdev_data *data;
 640
 641         list_for_each_entry(data, &wacom_udev_list, list) {
 642                 if (data->dev == dev) {
 643                         kref_get(&data->kref);
 644                         return data;
 645                 }
 646         }
 647
 648         return NULL;
 649 }
 650
 651 static int wacom_add_shared_data(struct wacom_wac *wacom,
 652                                  struct usb_device *dev)
 653 {
 654         struct wacom_usbdev_data *data;
 655         int retval = 0;
 656
 657         mutex_lock(&wacom_udev_list_lock);
 658
 659         data = wacom_get_usbdev_data(dev);
 660         if (!data) {
 661                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
 662                 if (!data) {
 663                         retval = -ENOMEM;
 664                         goto out;
 665                 }
 666
 667                 kref_init(&data->kref);
 668                 data->dev = dev;
 669                 list_add_tail(&data->list, &wacom_udev_list);
 670         }
 671
 672         wacom->shared = &data->shared;
 673
 674 out:
 675         mutex_unlock(&wacom_udev_list_lock);
 676         return retval;
 677 }
 678
 679 static void wacom_release_shared_data(struct kref *kref)
 680 {
 681         struct wacom_usbdev_data *data =
 682                 container_of(kref, struct wacom_usbdev_data, kref);
 683
 684         mutex_lock(&wacom_udev_list_lock);
 685         list_del(&data->list);
 686         mutex_unlock(&wacom_udev_list_lock);
 687
 688         kfree(data);
 689 }
 690
 691 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 692 {
 693         struct wacom_usbdev_data *data;
 694
 695         if (wacom->shared) {
 696                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
 697                 kref_put(&data->kref, wacom_release_shared_data);
 698                 wacom->shared = NULL;
 699         }
 700 }
 701
 702 static int wacom_led_control(struct wacom *wacom)
 703 {
 704         unsigned char *buf;
 705         int retval;
 706
 707         buf = kzalloc(9, GFP_KERNEL);
 708         if (!buf)
 709                 return -ENOMEM;
 710
 711         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 712             wacom->wacom_wac.features.type <= INTUOSPL) {
 713                 /*
 714                  * Touch Ring and crop mark LED luminance may take on
 715                  * one of four values:
 716                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 717                  */
 718                 int ring_led = wacom->led.select[0] & 0x03;
 719                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 720                 int crop_lum = 0;
 721
 722                 buf[0] = WAC_CMD_LED_CONTROL;
 723                 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 724         }
 725         else {
 726                 int led = wacom->led.select[0] | 0x4;
 727
 728                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 729                     wacom->wacom_wac.features.type == WACOM_24HD)
 730                         led |= (wacom->led.select[1] << 4) | 0x40;
 731
 732                 buf[0] = WAC_CMD_LED_CONTROL;
 733                 buf[1] = led;
 734                 buf[2] = wacom->led.llv;
 735                 buf[3] = wacom->led.hlv;
 736                 buf[4] = wacom->led.img_lum;
 737         }
 738
 739         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 740                                   buf, 9, WAC_CMD_RETRIES);
 741         kfree(buf);
 742
 743         return retval;
 744 }
 745
 746 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 747 {
 748         unsigned char *buf;
 749         int i, retval;
 750
 751         buf = kzalloc(259, GFP_KERNEL);
 752         if (!buf)
 753                 return -ENOMEM;
 754
 755         /* Send 'start' command */
 756         buf[0] = WAC_CMD_ICON_START;
 757         buf[1] = 1;
 758         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 759                                   buf, 2, WAC_CMD_RETRIES);
 760         if (retval < 0)
 761                 goto out;
 762
 763         buf[0] = WAC_CMD_ICON_XFER;
 764         buf[1] = button_id & 0x07;
 765         for (i = 0; i < 4; i++) {
 766                 buf[2] = i;
 767                 memcpy(buf + 3, img + i * 256, 256);
 768
 769                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 770                                           buf, 259, WAC_CMD_RETRIES);
 771                 if (retval < 0)
 772                         break;
 773         }
 774
 775         /* Send 'stop' */
 776         buf[0] = WAC_CMD_ICON_START;
 777         buf[1] = 0;
 778         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 779                          buf, 2, WAC_CMD_RETRIES);
 780
 781 out:
 782         kfree(buf);
 783         return retval;
 784 }
 785
 786 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 787                                       const char *buf, size_t count)
 788 {
 789         struct wacom *wacom = dev_get_drvdata(dev);
 790         unsigned int id;
 791         int err;
 792
 793         err = kstrtouint(buf, 10, &id);
 794         if (err)
 795                 return err;
 796
 797         mutex_lock(&wacom->lock);
 798
 799         wacom->led.select[set_id] = id & 0x3;
 800         err = wacom_led_control(wacom);
 801
 802         mutex_unlock(&wacom->lock);
 803
 804         return err < 0 ? err : count;
 805 }
 806
 807 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 808 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 809         struct device_attribute *attr, const char *buf, size_t count)   \
 810 {                                                                       \
 811         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 812 }                                                                       \
 813 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 814         struct device_attribute *attr, char *buf)                       \
 815 {                                                                       \
 816         struct wacom *wacom = dev_get_drvdata(dev);                     \
 817         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
 818 }                                                                       \
 819 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
 820                     wacom_led##SET_ID##_select_show,                    \
 821                     wacom_led##SET_ID##_select_store)
 822
 823 DEVICE_LED_SELECT_ATTR(0);
 824 DEVICE_LED_SELECT_ATTR(1);
 825
 826 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 827                                      const char *buf, size_t count)
 828 {
 829         unsigned int value;
 830         int err;
 831
 832         err = kstrtouint(buf, 10, &value);
 833         if (err)
 834                 return err;
 835
 836         mutex_lock(&wacom->lock);
 837
 838         *dest = value & 0x7f;
 839         err = wacom_led_control(wacom);
 840
 841         mutex_unlock(&wacom->lock);
 842
 843         return err < 0 ? err : count;
 844 }
 845
 846 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 847 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 848         struct device_attribute *attr, const char *buf, size_t count)   \
 849 {                                                                       \
 850         struct wacom *wacom = dev_get_drvdata(dev);                     \
 851                                                                         \
 852         return wacom_luminance_store(wacom, &wacom->led.field,          \
 853                                      buf, count);                       \
 854 }                                                                       \
 855 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 856                    NULL, wacom_##name##_luminance_store)
 857
 858 DEVICE_LUMINANCE_ATTR(status0, llv);
 859 DEVICE_LUMINANCE_ATTR(status1, hlv);
 860 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 861
 862 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 863                                         const char *buf, size_t count)
 864 {
 865         struct wacom *wacom = dev_get_drvdata(dev);
 866         int err;
 867
 868         if (count != 1024)
 869                 return -EINVAL;
 870
 871         mutex_lock(&wacom->lock);
 872
 873         err = wacom_led_putimage(wacom, button_id, buf);
 874
 875         mutex_unlock(&wacom->lock);
 876
 877         return err < 0 ? err : count;
 878 }
 879
 880 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 881 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 882         struct device_attribute *attr, const char *buf, size_t count)   \
 883 {                                                                       \
 884         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 885 }                                                                       \
 886 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 887                    NULL, wacom_btnimg##BUTTON_ID##_store)
 888
 889 DEVICE_BTNIMG_ATTR(0);
 890 DEVICE_BTNIMG_ATTR(1);
 891 DEVICE_BTNIMG_ATTR(2);
 892 DEVICE_BTNIMG_ATTR(3);
 893 DEVICE_BTNIMG_ATTR(4);
 894 DEVICE_BTNIMG_ATTR(5);
 895 DEVICE_BTNIMG_ATTR(6);
 896 DEVICE_BTNIMG_ATTR(7);
 897
 898 static struct attribute *cintiq_led_attrs[] = {
 899         &dev_attr_status_led0_select.attr,
 900         &dev_attr_status_led1_select.attr,
 901         NULL
 902 };
 903
 904 static struct attribute_group cintiq_led_attr_group = {
 905         .name = "wacom_led",
 906         .attrs = cintiq_led_attrs,
 907 };
 908
 909 static struct attribute *intuos4_led_attrs[] = {
 910         &dev_attr_status0_luminance.attr,
 911         &dev_attr_status1_luminance.attr,
 912         &dev_attr_status_led0_select.attr,
 913         &dev_attr_buttons_luminance.attr,
 914         &dev_attr_button0_rawimg.attr,
 915         &dev_attr_button1_rawimg.attr,
 916         &dev_attr_button2_rawimg.attr,
 917         &dev_attr_button3_rawimg.attr,
 918         &dev_attr_button4_rawimg.attr,
 919         &dev_attr_button5_rawimg.attr,
 920         &dev_attr_button6_rawimg.attr,
 921         &dev_attr_button7_rawimg.attr,
 922         NULL
 923 };
 924
 925 static struct attribute_group intuos4_led_attr_group = {
 926         .name = "wacom_led",
 927         .attrs = intuos4_led_attrs,
 928 };
 929
 930 static struct attribute *intuos5_led_attrs[] = {
 931         &dev_attr_status0_luminance.attr,
 932         &dev_attr_status_led0_select.attr,
 933         NULL
 934 };
 935
 936 static struct attribute_group intuos5_led_attr_group = {
 937         .name = "wacom_led",
 938         .attrs = intuos5_led_attrs,
 939 };
 940
 941 static int wacom_initialize_leds(struct wacom *wacom)
 942 {
 943         int error;
 944
 945         /* Initialize default values */
 946         switch (wacom->wacom_wac.features.type) {
 947         case INTUOS4S:
 948         case INTUOS4:
 949         case INTUOS4L:
 950                 wacom->led.select[0] = 0;
 951                 wacom->led.select[1] = 0;
 952                 wacom->led.llv = 10;
 953                 wacom->led.hlv = 20;
 954                 wacom->led.img_lum = 10;
 955                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 956                                            &intuos4_led_attr_group);
 957                 break;
 958
 959         case WACOM_24HD:
 960         case WACOM_21UX2:
 961                 wacom->led.select[0] = 0;
 962                 wacom->led.select[1] = 0;
 963                 wacom->led.llv = 0;
 964                 wacom->led.hlv = 0;
 965                 wacom->led.img_lum = 0;
 966
 967                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 968                                            &cintiq_led_attr_group);
 969                 break;
 970
 971         case INTUOS5S:
 972         case INTUOS5:
 973         case INTUOS5L:
 974         case INTUOSPS:
 975         case INTUOSPM:
 976         case INTUOSPL:
 977                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 978                         wacom->led.select[0] = 0;
 979                         wacom->led.select[1] = 0;
 980                         wacom->led.llv = 32;
 981                         wacom->led.hlv = 0;
 982                         wacom->led.img_lum = 0;
 983
 984                         error = sysfs_create_group(&wacom->intf->dev.kobj,
 985                                                   &intuos5_led_attr_group);
 986                 } else
 987                         return 0;
 988                 break;
 989
 990         default:
 991                 return 0;
 992         }
 993
 994         if (error) {
 995                 dev_err(&wacom->intf->dev,
 996                         "cannot create sysfs group err: %d\n", error);
 997                 return error;
 998         }
 999         wacom_led_control(wacom);
1000
1001         return 0;
1002 }
1003
1004 static void wacom_destroy_leds(struct wacom *wacom)
1005 {
1006         switch (wacom->wacom_wac.features.type) {
1007         case INTUOS4S:
1008         case INTUOS4:
1009         case INTUOS4L:
1010                 sysfs_remove_group(&wacom->intf->dev.kobj,
1011                                    &intuos4_led_attr_group);
1012                 break;
1013
1014         case WACOM_24HD:
1015         case WACOM_21UX2:
1016                 sysfs_remove_group(&wacom->intf->dev.kobj,
1017                                    &cintiq_led_attr_group);
1018                 break;
1019
1020         case INTUOS5S:
1021         case INTUOS5:
1022         case INTUOS5L:
1023         case INTUOSPS:
1024         case INTUOSPM:
1025         case INTUOSPL:
1026                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
1027                         sysfs_remove_group(&wacom->intf->dev.kobj,
1028                                            &intuos5_led_attr_group);
1029                 break;
1030         }
1031 }
1032
1033 static enum power_supply_property wacom_battery_props[] = {
1034         POWER_SUPPLY_PROP_SCOPE,
1035         POWER_SUPPLY_PROP_CAPACITY
1036 };
1037
1038 static int wacom_battery_get_property(struct power_supply *psy,
1039                                       enum power_supply_property psp,
1040                                       union power_supply_propval *val)
1041 {
1042         struct wacom *wacom = container_of(psy, struct wacom, battery);
1043         int ret = 0;
1044
1045         switch (psp) {
1046                 case POWER_SUPPLY_PROP_SCOPE:
1047                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1048                         break;
1049                 case POWER_SUPPLY_PROP_CAPACITY:
1050                         val->intval =
1051                                 wacom->wacom_wac.battery_capacity * 100 / 31;
1052                         break;
1053                 default:
1054                         ret = -EINVAL;
1055                         break;
1056         }
1057
1058         return ret;
1059 }
1060
1061 static int wacom_initialize_battery(struct wacom *wacom)
1062 {
1063         int error = 0;
1064
1065         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1066                 wacom->battery.properties = wacom_battery_props;
1067                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1068                 wacom->battery.get_property = wacom_battery_get_property;
1069                 wacom->battery.name = "wacom_battery";
1070                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1071                 wacom->battery.use_for_apm = 0;
1072
1073                 error = power_supply_register(&wacom->usbdev->dev,
1074                                               &wacom->battery);
1075
1076                 if (!error)
1077                         power_supply_powers(&wacom->battery,
1078                                             &wacom->usbdev->dev);
1079         }
1080
1081         return error;
1082 }
1083
1084 static void wacom_destroy_battery(struct wacom *wacom)
1085 {
1086         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1087             wacom->battery.dev) {
1088                 power_supply_unregister(&wacom->battery);
1089                 wacom->battery.dev = NULL;
1090         }
1091 }
1092
1093 static int wacom_register_input(struct wacom *wacom)
1094 {
1095         struct input_dev *input_dev;
1096         struct usb_interface *intf = wacom->intf;
1097         struct usb_device *dev = interface_to_usbdev(intf);
1098         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1099         int error;
1100
1101         input_dev = input_allocate_device();
1102         if (!input_dev) {
1103                 error = -ENOMEM;
1104                 goto fail1;
1105         }
1106
1107         input_dev->name = wacom_wac->name;
1108         input_dev->dev.parent = &intf->dev;
1109         input_dev->open = wacom_open;
1110         input_dev->close = wacom_close;
1111         usb_to_input_id(dev, &input_dev->id);
1112         input_set_drvdata(input_dev, wacom);
1113
1114         wacom_wac->input = input_dev;
1115         error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1116         if (error)
1117                 goto fail1;
1118
1119         error = input_register_device(input_dev);
1120         if (error)
1121                 goto fail2;
1122
1123         return 0;
1124
1125 fail2:
1126         input_free_device(input_dev);
1127         wacom_wac->input = NULL;
1128 fail1:
1129         return error;
1130 }
1131
1132 static void wacom_wireless_work(struct work_struct *work)
1133 {
1134         struct wacom *wacom = container_of(work, struct wacom, work);
1135         struct usb_device *usbdev = wacom->usbdev;
1136         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1137         struct wacom *wacom1, *wacom2;
1138         struct wacom_wac *wacom_wac1, *wacom_wac2;
1139         int error;
1140
1141         /*
1142          * Regardless if this is a disconnect or a new tablet,
1143          * remove any existing input and battery devices.
1144          */
1145
1146         wacom_destroy_battery(wacom);
1147
1148         /* Stylus interface */
1149         wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1150         wacom_wac1 = &(wacom1->wacom_wac);
1151         if (wacom_wac1->input)
1152                 input_unregister_device(wacom_wac1->input);
1153         wacom_wac1->input = NULL;
1154
1155         /* Touch interface */
1156         wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1157         wacom_wac2 = &(wacom2->wacom_wac);
1158         if (wacom_wac2->input)
1159                 input_unregister_device(wacom_wac2->input);
1160         wacom_wac2->input = NULL;
1161
1162         if (wacom_wac->pid == 0) {
1163                 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1164         } else {
1165                 const struct usb_device_id *id = wacom_ids;
1166
1167                 dev_info(&wacom->intf->dev,
1168                          "wireless tablet connected with PID %x\n",
1169                          wacom_wac->pid);
1170
1171                 while (id->match_flags) {
1172                         if (id->idVendor == USB_VENDOR_ID_WACOM &&
1173                             id->idProduct == wacom_wac->pid)
1174                                 break;
1175                         id++;
1176                 }
1177
1178                 if (!id->match_flags) {
1179                         dev_info(&wacom->intf->dev,
1180                                  "ignoring unknown PID.\n");
1181                         return;
1182                 }
1183
1184                 /* Stylus interface */
1185                 wacom_wac1->features =
1186                         *((struct wacom_features *)id->driver_info);
1187                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1188                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1189                          wacom_wac1->features.name);
1190                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1191                 wacom_wac1->shared->type = wacom_wac1->features.type;
1192                 error = wacom_register_input(wacom1);
1193                 if (error)
1194                         goto fail;
1195
1196                 /* Touch interface */
1197                 if (wacom_wac1->features.touch_max ||
1198                     wacom_wac1->features.type == INTUOSHT) {
1199                         wacom_wac2->features =
1200                                 *((struct wacom_features *)id->driver_info);
1201                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1202                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1203                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1204                         if (wacom_wac2->features.touch_max)
1205                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1206                                          "%s (WL) Finger",wacom_wac2->features.name);
1207                         else
1208                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1209                                          "%s (WL) Pad",wacom_wac2->features.name);
1210                         error = wacom_register_input(wacom2);
1211                         if (error)
1212                                 goto fail;
1213
1214                         if (wacom_wac1->features.type == INTUOSHT &&
1215                             wacom_wac1->features.touch_max)
1216                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1217                 }
1218
1219                 error = wacom_initialize_battery(wacom);
1220                 if (error)
1221                         goto fail;
1222         }
1223
1224         return;
1225
1226 fail:
1227         if (wacom_wac2->input) {
1228                 input_unregister_device(wacom_wac2->input);
1229                 wacom_wac2->input = NULL;
1230         }
1231
1232         if (wacom_wac1->input) {
1233                 input_unregister_device(wacom_wac1->input);
1234                 wacom_wac1->input = NULL;
1235         }
1236         return;
1237 }
1238
1239 /*
1240  * Not all devices report physical dimensions from HID.
1241  * Compute the default from hardcoded logical dimension
1242  * and resolution before driver overwrites them.
1243  */
1244 static void wacom_set_default_phy(struct wacom_features *features)
1245 {
1246         if (features->x_resolution) {
1247                 features->x_phy = (features->x_max * 100) /
1248                                         features->x_resolution;
1249                 features->y_phy = (features->y_max * 100) /
1250                                         features->y_resolution;
1251         }
1252 }
1253
1254 static void wacom_calculate_res(struct wacom_features *features)
1255 {
1256         features->x_resolution = wacom_calc_hid_res(features->x_max,
1257                                                     features->x_phy,
1258                                                     features->unit,
1259                                                     features->unitExpo);
1260         features->y_resolution = wacom_calc_hid_res(features->y_max,
1261                                                     features->y_phy,
1262                                                     features->unit,
1263                                                     features->unitExpo);
1264 }
1265
1266 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1267 {
1268         struct usb_device *dev = interface_to_usbdev(intf);
1269         struct usb_endpoint_descriptor *endpoint;
1270         struct wacom *wacom;
1271         struct wacom_wac *wacom_wac;
1272         struct wacom_features *features;
1273         int error;
1274
1275         if (!id->driver_info)
1276                 return -EINVAL;
1277
1278         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1279         if (!wacom)
1280                 return -ENOMEM;
1281
1282         wacom_wac = &wacom->wacom_wac;
1283         wacom_wac->features = *((struct wacom_features *)id->driver_info);
1284         features = &wacom_wac->features;
1285         if (features->pktlen > WACOM_PKGLEN_MAX) {
1286                 error = -EINVAL;
1287                 goto fail1;
1288         }
1289
1290         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1291                                              GFP_KERNEL, &wacom->data_dma);
1292         if (!wacom_wac->data) {
1293                 error = -ENOMEM;
1294                 goto fail1;
1295         }
1296
1297         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1298         if (!wacom->irq) {
1299                 error = -ENOMEM;
1300                 goto fail2;
1301         }
1302
1303         wacom->usbdev = dev;
1304         wacom->intf = intf;
1305         mutex_init(&wacom->lock);
1306         INIT_WORK(&wacom->work, wacom_wireless_work);
1307         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1308         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1309
1310         endpoint = &intf->cur_altsetting->endpoint[0].desc;
1311
1312         /* set the default size in case we do not get them from hid */
1313         wacom_set_default_phy(features);
1314
1315         /* Retrieve the physical and logical size for touch devices */
1316         error = wacom_retrieve_hid_descriptor(intf, features);
1317         if (error)
1318                 goto fail3;
1319
1320         /*
1321          * Intuos5 has no useful data about its touch interface in its
1322          * HID descriptor. If this is the touch interface (wMaxPacketSize
1323          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1324          */
1325         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1326                 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1327                         features->device_type = BTN_TOOL_FINGER;
1328                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1329
1330                         features->x_max = 4096;
1331                         features->y_max = 4096;
1332                 } else {
1333                         features->device_type = BTN_TOOL_PEN;
1334                 }
1335         }
1336
1337         wacom_setup_device_quirks(features);
1338
1339         /* set unit to "100th of a mm" for devices not reported by HID */
1340         if (!features->unit) {
1341                 features->unit = 0x11;
1342                 features->unitExpo = 16 - 3;
1343         }
1344         wacom_calculate_res(features);
1345
1346         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1347
1348         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1349                 struct usb_device *other_dev;
1350
1351                 /* Append the device type to the name */
1352                 if (features->device_type != BTN_TOOL_FINGER)
1353                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1354                 else if (features->touch_max)
1355                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1356                 else
1357                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1358
1359                 other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
1360                 if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
1361                         other_dev = dev;
1362                 error = wacom_add_shared_data(wacom_wac, other_dev);
1363                 if (error)
1364                         goto fail3;
1365         }
1366
1367         usb_fill_int_urb(wacom->irq, dev,
1368                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1369                          wacom_wac->data, features->pktlen,
1370                          wacom_sys_irq, wacom, endpoint->bInterval);
1371         wacom->irq->transfer_dma = wacom->data_dma;
1372         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1373
1374         error = wacom_initialize_leds(wacom);
1375         if (error)
1376                 goto fail4;
1377
1378         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1379                 error = wacom_register_input(wacom);
1380                 if (error)
1381                         goto fail5;
1382         }
1383
1384         /* Note that if query fails it is not a hard failure */
1385         wacom_query_tablet_data(intf, features);
1386
1387         usb_set_intfdata(intf, wacom);
1388
1389         if (features->quirks & WACOM_QUIRK_MONITOR) {
1390                 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
1391                         error = -EIO;
1392                         goto fail5;
1393                 }
1394         }
1395
1396         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1397                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1398                         wacom_wac->shared->touch_input = wacom_wac->input;
1399         }
1400
1401         return 0;
1402
1403  fail5: wacom_destroy_leds(wacom);
1404  fail4: wacom_remove_shared_data(wacom_wac);
1405  fail3: usb_free_urb(wacom->irq);
1406  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1407  fail1: kfree(wacom);
1408         return error;
1409 }
1410
1411 static void wacom_disconnect(struct usb_interface *intf)
1412 {
1413         struct wacom *wacom = usb_get_intfdata(intf);
1414
1415         usb_set_intfdata(intf, NULL);
1416
1417         usb_kill_urb(wacom->irq);
1418         cancel_work_sync(&wacom->work);
1419         if (wacom->wacom_wac.input)
1420                 input_unregister_device(wacom->wacom_wac.input);
1421         wacom_destroy_battery(wacom);
1422         wacom_destroy_leds(wacom);
1423         usb_free_urb(wacom->irq);
1424         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1425                         wacom->wacom_wac.data, wacom->data_dma);
1426         wacom_remove_shared_data(&wacom->wacom_wac);
1427         kfree(wacom);
1428 }
1429
1430 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1431 {
1432         struct wacom *wacom = usb_get_intfdata(intf);
1433
1434         mutex_lock(&wacom->lock);
1435         usb_kill_urb(wacom->irq);
1436         mutex_unlock(&wacom->lock);
1437
1438         return 0;
1439 }
1440
1441 static int wacom_resume(struct usb_interface *intf)
1442 {
1443         struct wacom *wacom = usb_get_intfdata(intf);
1444         struct wacom_features *features = &wacom->wacom_wac.features;
1445         int rv = 0;
1446
1447         mutex_lock(&wacom->lock);
1448
1449         /* switch to wacom mode first */
1450         wacom_query_tablet_data(intf, features);
1451         wacom_led_control(wacom);
1452
1453         if ((wacom->open || (features->quirks & WACOM_QUIRK_MONITOR)) &&
1454             usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1455                 rv = -EIO;
1456
1457         mutex_unlock(&wacom->lock);
1458
1459         return rv;
1460 }
1461
1462 static int wacom_reset_resume(struct usb_interface *intf)
1463 {
1464         return wacom_resume(intf);
1465 }
1466
1467 static struct usb_driver wacom_driver = {
1468         .name =         "wacom",
1469         .id_table =     wacom_ids,
1470         .probe =        wacom_probe,
1471         .disconnect =   wacom_disconnect,
1472         .suspend =      wacom_suspend,
1473         .resume =       wacom_resume,
1474         .reset_resume = wacom_reset_resume,
1475         .supports_autosuspend = 1,
1476 };
1477
1478 module_usb_driver(wacom_driver);