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                                         case MTTPC_B:
 353                                                 features->pktlen = WACOM_PKGLEN_MTTPC;
 354                                                 break;
 355
 356                                         case BAMBOO_PT:
 357                                                 features->pktlen = WACOM_PKGLEN_BBTOUCH;
 358                                                 break;
 359
 360                                         default:
 361                                                 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 362                                                 break;
 363                                         }
 364
 365                                         switch (features->type) {
 366                                         case BAMBOO_PT:
 367                                                 features->x_phy =
 368                                                         get_unaligned_le16(&report[i + 5]);
 369                                                 features->x_max =
 370                                                         get_unaligned_le16(&report[i + 8]);
 371                                                 i += 15;
 372                                                 break;
 373
 374                                         case WACOM_24HDT:
 375                                                 features->x_max =
 376                                                         get_unaligned_le16(&report[i + 3]);
 377                                                 features->x_phy =
 378                                                         get_unaligned_le16(&report[i + 8]);
 379                                                 features->unit = report[i - 1];
 380                                                 features->unitExpo = report[i - 3];
 381                                                 i += 12;
 382                                                 break;
 383
 384                                         case MTTPC_B:
 385                                                 features->x_max =
 386                                                         get_unaligned_le16(&report[i + 3]);
 387                                                 features->x_phy =
 388                                                         get_unaligned_le16(&report[i + 6]);
 389                                                 features->unit = report[i - 5];
 390                                                 features->unitExpo = report[i - 3];
 391                                                 i += 9;
 392                                                 break;
 393
 394                                         default:
 395                                                 features->x_max =
 396                                                         get_unaligned_le16(&report[i + 3]);
 397                                                 features->x_phy =
 398                                                         get_unaligned_le16(&report[i + 6]);
 399                                                 features->unit = report[i + 9];
 400                                                 features->unitExpo = report[i + 11];
 401                                                 i += 12;
 402                                                 break;
 403                                         }
 404                                 } else if (pen) {
 405                                         /* penabled only accepts exact bytes of data */
 406                                         if (features->type >= TABLETPC)
 407                                                 features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 408                                         features->device_type = BTN_TOOL_PEN;
 409                                         features->x_max =
 410                                                 get_unaligned_le16(&report[i + 3]);
 411                                         i += 4;
 412                                 }
 413                                 break;
 414
 415                         case HID_USAGE_Y:
 416                                 if (finger) {
 417                                         switch (features->type) {
 418                                         case TABLETPC2FG:
 419                                         case MTSCREEN:
 420                                         case MTTPC:
 421                                                 features->y_max =
 422                                                         get_unaligned_le16(&report[i + 3]);
 423                                                 features->y_phy =
 424                                                         get_unaligned_le16(&report[i + 6]);
 425                                                 i += 7;
 426                                                 break;
 427
 428                                         case WACOM_24HDT:
 429                                                 features->y_max =
 430                                                         get_unaligned_le16(&report[i + 3]);
 431                                                 features->y_phy =
 432                                                         get_unaligned_le16(&report[i - 2]);
 433                                                 i += 7;
 434                                                 break;
 435
 436                                         case BAMBOO_PT:
 437                                                 features->y_phy =
 438                                                         get_unaligned_le16(&report[i + 3]);
 439                                                 features->y_max =
 440                                                         get_unaligned_le16(&report[i + 6]);
 441                                                 i += 12;
 442                                                 break;
 443
 444                                         case MTTPC_B:
 445                                                 features->y_max =
 446                                                         get_unaligned_le16(&report[i + 3]);
 447                                                 features->y_phy =
 448                                                         get_unaligned_le16(&report[i + 6]);
 449                                                 i += 9;
 450                                                 break;
 451
 452                                         default:
 453                                                 features->y_max =
 454                                                         features->x_max;
 455                                                 features->y_phy =
 456                                                         get_unaligned_le16(&report[i + 3]);
 457                                                 i += 4;
 458                                                 break;
 459                                         }
 460                                 } else if (pen) {
 461                                         features->y_max =
 462                                                 get_unaligned_le16(&report[i + 3]);
 463                                         i += 4;
 464                                 }
 465                                 break;
 466
 467                         case HID_USAGE_FINGER:
 468                                 finger = 1;
 469                                 i++;
 470                                 break;
 471
 472                         /*
 473                          * Requiring Stylus Usage will ignore boot mouse
 474                          * X/Y values and some cases of invalid Digitizer X/Y
 475                          * values commonly reported.
 476                          */
 477                         case HID_USAGE_STYLUS:
 478                                 pen = 1;
 479                                 i++;
 480                                 break;
 481
 482                         case HID_USAGE_CONTACTMAX:
 483                                 /* leave touch_max as is if predefined */
 484                                 if (!features->touch_max)
 485                                         wacom_retrieve_report_data(intf, features);
 486                                 i++;
 487                                 break;
 488
 489                         case HID_USAGE_PRESSURE:
 490                                 if (pen) {
 491                                         features->pressure_max =
 492                                                 get_unaligned_le16(&report[i + 3]);
 493                                         i += 4;
 494                                 }
 495                                 break;
 496                         }
 497                         break;
 498
 499                 case HID_COLLECTION_END:
 500                         /* reset UsagePage and Finger */
 501                         finger = page = 0;
 502                         break;
 503
 504                 case HID_COLLECTION:
 505                         i++;
 506                         switch (report[i]) {
 507                         case HID_COLLECTION_LOGICAL:
 508                                 i += wacom_parse_logical_collection(&report[i],
 509                                                                     features);
 510                                 break;
 511                         }
 512                         break;
 513                 }
 514         }
 515
 516  out:
 517         if (!features->touch_max && touch_max)
 518                 features->touch_max = touch_max;
 519         result = 0;
 520         kfree(report);
 521         return result;
 522 }
 523
 524 static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int length, int mode)
 525 {
 526         unsigned char *rep_data;
 527         int error = -ENOMEM, limit = 0;
 528
 529         rep_data = kzalloc(length, GFP_KERNEL);
 530         if (!rep_data)
 531                 return error;
 532
 533         do {
 534                 rep_data[0] = report_id;
 535                 rep_data[1] = mode;
 536
 537                 error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 538                                          report_id, rep_data, length, 1);
 539         } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 540
 541         kfree(rep_data);
 542
 543         return error < 0 ? error : 0;
 544 }
 545
 546 /*
 547  * Switch the tablet into its most-capable mode. Wacom tablets are
 548  * typically configured to power-up in a mode which sends mouse-like
 549  * reports to the OS. To get absolute position, pressure data, etc.
 550  * from the tablet, it is necessary to switch the tablet out of this
 551  * mode and into one which sends the full range of tablet data.
 552  */
 553 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 554 {
 555         if (features->device_type == BTN_TOOL_FINGER) {
 556                 if (features->type > TABLETPC) {
 557                         /* MT Tablet PC touch */
 558                         return wacom_set_device_mode(intf, 3, 4, 4);
 559                 }
 560                 else if (features->type == WACOM_24HDT || features->type == CINTIQ_HYBRID) {
 561                         return wacom_set_device_mode(intf, 18, 3, 2);
 562                 }
 563         } else if (features->device_type == BTN_TOOL_PEN) {
 564                 if (features->type <= BAMBOO_PT && features->type != WIRELESS) {
 565                         return wacom_set_device_mode(intf, 2, 2, 2);
 566                 }
 567         }
 568
 569         return 0;
 570 }
 571
 572 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 573                                          struct wacom_features *features)
 574 {
 575         int error = 0;
 576         struct usb_host_interface *interface = intf->cur_altsetting;
 577         struct hid_descriptor *hid_desc;
 578
 579         /* default features */
 580         features->device_type = BTN_TOOL_PEN;
 581         features->x_fuzz = 4;
 582         features->y_fuzz = 4;
 583         features->pressure_fuzz = 0;
 584         features->distance_fuzz = 0;
 585
 586         /*
 587          * The wireless device HID is basic and layout conflicts with
 588          * other tablets (monitor and touch interface can look like pen).
 589          * Skip the query for this type and modify defaults based on
 590          * interface number.
 591          */
 592         if (features->type == WIRELESS) {
 593                 if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
 594                         features->device_type = 0;
 595                 } else if (intf->cur_altsetting->desc.bInterfaceNumber == 2) {
 596                         features->device_type = BTN_TOOL_FINGER;
 597                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 598                 }
 599         }
 600
 601         /* only devices that support touch need to retrieve the info */
 602         if (features->type < BAMBOO_PT) {
 603                 goto out;
 604         }
 605
 606         error = usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc);
 607         if (error) {
 608                 error = usb_get_extra_descriptor(&interface->endpoint[0],
 609                                                  HID_DEVICET_REPORT, &hid_desc);
 610                 if (error) {
 611                         dev_err(&intf->dev,
 612                                 "can not retrieve extra class descriptor\n");
 613                         goto out;
 614                 }
 615         }
 616         error = wacom_parse_hid(intf, hid_desc, features);
 617
 618  out:
 619         return error;
 620 }
 621
 622 struct wacom_usbdev_data {
 623         struct list_head list;
 624         struct kref kref;
 625         struct usb_device *dev;
 626         struct wacom_shared shared;
 627 };
 628
 629 static LIST_HEAD(wacom_udev_list);
 630 static DEFINE_MUTEX(wacom_udev_list_lock);
 631
 632 static struct usb_device *wacom_get_sibling(struct usb_device *dev, int vendor, int product)
 633 {
 634         int port1;
 635         struct usb_device *sibling;
 636
 637         if (vendor == 0 && product == 0)
 638                 return dev;
 639
 640         if (dev->parent == NULL)
 641                 return NULL;
 642
 643         usb_hub_for_each_child(dev->parent, port1, sibling) {
 644                 struct usb_device_descriptor *d;
 645                 if (sibling == NULL)
 646                         continue;
 647
 648                 d = &sibling->descriptor;
 649                 if (d->idVendor == vendor && d->idProduct == product)
 650                         return sibling;
 651         }
 652
 653         return NULL;
 654 }
 655
 656 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
 657 {
 658         struct wacom_usbdev_data *data;
 659
 660         list_for_each_entry(data, &wacom_udev_list, list) {
 661                 if (data->dev == dev) {
 662                         kref_get(&data->kref);
 663                         return data;
 664                 }
 665         }
 666
 667         return NULL;
 668 }
 669
 670 static int wacom_add_shared_data(struct wacom_wac *wacom,
 671                                  struct usb_device *dev)
 672 {
 673         struct wacom_usbdev_data *data;
 674         int retval = 0;
 675
 676         mutex_lock(&wacom_udev_list_lock);
 677
 678         data = wacom_get_usbdev_data(dev);
 679         if (!data) {
 680                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
 681                 if (!data) {
 682                         retval = -ENOMEM;
 683                         goto out;
 684                 }
 685
 686                 kref_init(&data->kref);
 687                 data->dev = dev;
 688                 list_add_tail(&data->list, &wacom_udev_list);
 689         }
 690
 691         wacom->shared = &data->shared;
 692
 693 out:
 694         mutex_unlock(&wacom_udev_list_lock);
 695         return retval;
 696 }
 697
 698 static void wacom_release_shared_data(struct kref *kref)
 699 {
 700         struct wacom_usbdev_data *data =
 701                 container_of(kref, struct wacom_usbdev_data, kref);
 702
 703         mutex_lock(&wacom_udev_list_lock);
 704         list_del(&data->list);
 705         mutex_unlock(&wacom_udev_list_lock);
 706
 707         kfree(data);
 708 }
 709
 710 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 711 {
 712         struct wacom_usbdev_data *data;
 713
 714         if (wacom->shared) {
 715                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
 716                 kref_put(&data->kref, wacom_release_shared_data);
 717                 wacom->shared = NULL;
 718         }
 719 }
 720
 721 static int wacom_led_control(struct wacom *wacom)
 722 {
 723         unsigned char *buf;
 724         int retval;
 725
 726         buf = kzalloc(9, GFP_KERNEL);
 727         if (!buf)
 728                 return -ENOMEM;
 729
 730         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 731             wacom->wacom_wac.features.type <= INTUOSPL) {
 732                 /*
 733                  * Touch Ring and crop mark LED luminance may take on
 734                  * one of four values:
 735                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 736                  */
 737                 int ring_led = wacom->led.select[0] & 0x03;
 738                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 739                 int crop_lum = 0;
 740
 741                 buf[0] = WAC_CMD_LED_CONTROL;
 742                 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 743         }
 744         else {
 745                 int led = wacom->led.select[0] | 0x4;
 746
 747                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 748                     wacom->wacom_wac.features.type == WACOM_24HD)
 749                         led |= (wacom->led.select[1] << 4) | 0x40;
 750
 751                 buf[0] = WAC_CMD_LED_CONTROL;
 752                 buf[1] = led;
 753                 buf[2] = wacom->led.llv;
 754                 buf[3] = wacom->led.hlv;
 755                 buf[4] = wacom->led.img_lum;
 756         }
 757
 758         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 759                                   buf, 9, WAC_CMD_RETRIES);
 760         kfree(buf);
 761
 762         return retval;
 763 }
 764
 765 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 766 {
 767         unsigned char *buf;
 768         int i, retval;
 769
 770         buf = kzalloc(259, GFP_KERNEL);
 771         if (!buf)
 772                 return -ENOMEM;
 773
 774         /* Send 'start' command */
 775         buf[0] = WAC_CMD_ICON_START;
 776         buf[1] = 1;
 777         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 778                                   buf, 2, WAC_CMD_RETRIES);
 779         if (retval < 0)
 780                 goto out;
 781
 782         buf[0] = WAC_CMD_ICON_XFER;
 783         buf[1] = button_id & 0x07;
 784         for (i = 0; i < 4; i++) {
 785                 buf[2] = i;
 786                 memcpy(buf + 3, img + i * 256, 256);
 787
 788                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 789                                           buf, 259, WAC_CMD_RETRIES);
 790                 if (retval < 0)
 791                         break;
 792         }
 793
 794         /* Send 'stop' */
 795         buf[0] = WAC_CMD_ICON_START;
 796         buf[1] = 0;
 797         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 798                          buf, 2, WAC_CMD_RETRIES);
 799
 800 out:
 801         kfree(buf);
 802         return retval;
 803 }
 804
 805 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 806                                       const char *buf, size_t count)
 807 {
 808         struct wacom *wacom = dev_get_drvdata(dev);
 809         unsigned int id;
 810         int err;
 811
 812         err = kstrtouint(buf, 10, &id);
 813         if (err)
 814                 return err;
 815
 816         mutex_lock(&wacom->lock);
 817
 818         wacom->led.select[set_id] = id & 0x3;
 819         err = wacom_led_control(wacom);
 820
 821         mutex_unlock(&wacom->lock);
 822
 823         return err < 0 ? err : count;
 824 }
 825
 826 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 827 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 828         struct device_attribute *attr, const char *buf, size_t count)   \
 829 {                                                                       \
 830         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 831 }                                                                       \
 832 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 833         struct device_attribute *attr, char *buf)                       \
 834 {                                                                       \
 835         struct wacom *wacom = dev_get_drvdata(dev);                     \
 836         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
 837 }                                                                       \
 838 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
 839                     wacom_led##SET_ID##_select_show,                    \
 840                     wacom_led##SET_ID##_select_store)
 841
 842 DEVICE_LED_SELECT_ATTR(0);
 843 DEVICE_LED_SELECT_ATTR(1);
 844
 845 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 846                                      const char *buf, size_t count)
 847 {
 848         unsigned int value;
 849         int err;
 850
 851         err = kstrtouint(buf, 10, &value);
 852         if (err)
 853                 return err;
 854
 855         mutex_lock(&wacom->lock);
 856
 857         *dest = value & 0x7f;
 858         err = wacom_led_control(wacom);
 859
 860         mutex_unlock(&wacom->lock);
 861
 862         return err < 0 ? err : count;
 863 }
 864
 865 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 866 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 867         struct device_attribute *attr, const char *buf, size_t count)   \
 868 {                                                                       \
 869         struct wacom *wacom = dev_get_drvdata(dev);                     \
 870                                                                         \
 871         return wacom_luminance_store(wacom, &wacom->led.field,          \
 872                                      buf, count);                       \
 873 }                                                                       \
 874 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 875                    NULL, wacom_##name##_luminance_store)
 876
 877 DEVICE_LUMINANCE_ATTR(status0, llv);
 878 DEVICE_LUMINANCE_ATTR(status1, hlv);
 879 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 880
 881 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 882                                         const char *buf, size_t count)
 883 {
 884         struct wacom *wacom = dev_get_drvdata(dev);
 885         int err;
 886
 887         if (count != 1024)
 888                 return -EINVAL;
 889
 890         mutex_lock(&wacom->lock);
 891
 892         err = wacom_led_putimage(wacom, button_id, buf);
 893
 894         mutex_unlock(&wacom->lock);
 895
 896         return err < 0 ? err : count;
 897 }
 898
 899 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 900 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 901         struct device_attribute *attr, const char *buf, size_t count)   \
 902 {                                                                       \
 903         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 904 }                                                                       \
 905 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 906                    NULL, wacom_btnimg##BUTTON_ID##_store)
 907
 908 DEVICE_BTNIMG_ATTR(0);
 909 DEVICE_BTNIMG_ATTR(1);
 910 DEVICE_BTNIMG_ATTR(2);
 911 DEVICE_BTNIMG_ATTR(3);
 912 DEVICE_BTNIMG_ATTR(4);
 913 DEVICE_BTNIMG_ATTR(5);
 914 DEVICE_BTNIMG_ATTR(6);
 915 DEVICE_BTNIMG_ATTR(7);
 916
 917 static struct attribute *cintiq_led_attrs[] = {
 918         &dev_attr_status_led0_select.attr,
 919         &dev_attr_status_led1_select.attr,
 920         NULL
 921 };
 922
 923 static struct attribute_group cintiq_led_attr_group = {
 924         .name = "wacom_led",
 925         .attrs = cintiq_led_attrs,
 926 };
 927
 928 static struct attribute *intuos4_led_attrs[] = {
 929         &dev_attr_status0_luminance.attr,
 930         &dev_attr_status1_luminance.attr,
 931         &dev_attr_status_led0_select.attr,
 932         &dev_attr_buttons_luminance.attr,
 933         &dev_attr_button0_rawimg.attr,
 934         &dev_attr_button1_rawimg.attr,
 935         &dev_attr_button2_rawimg.attr,
 936         &dev_attr_button3_rawimg.attr,
 937         &dev_attr_button4_rawimg.attr,
 938         &dev_attr_button5_rawimg.attr,
 939         &dev_attr_button6_rawimg.attr,
 940         &dev_attr_button7_rawimg.attr,
 941         NULL
 942 };
 943
 944 static struct attribute_group intuos4_led_attr_group = {
 945         .name = "wacom_led",
 946         .attrs = intuos4_led_attrs,
 947 };
 948
 949 static struct attribute *intuos5_led_attrs[] = {
 950         &dev_attr_status0_luminance.attr,
 951         &dev_attr_status_led0_select.attr,
 952         NULL
 953 };
 954
 955 static struct attribute_group intuos5_led_attr_group = {
 956         .name = "wacom_led",
 957         .attrs = intuos5_led_attrs,
 958 };
 959
 960 static int wacom_initialize_leds(struct wacom *wacom)
 961 {
 962         int error;
 963
 964         /* Initialize default values */
 965         switch (wacom->wacom_wac.features.type) {
 966         case INTUOS4S:
 967         case INTUOS4:
 968         case INTUOS4L:
 969                 wacom->led.select[0] = 0;
 970                 wacom->led.select[1] = 0;
 971                 wacom->led.llv = 10;
 972                 wacom->led.hlv = 20;
 973                 wacom->led.img_lum = 10;
 974                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 975                                            &intuos4_led_attr_group);
 976                 break;
 977
 978         case WACOM_24HD:
 979         case WACOM_21UX2:
 980                 wacom->led.select[0] = 0;
 981                 wacom->led.select[1] = 0;
 982                 wacom->led.llv = 0;
 983                 wacom->led.hlv = 0;
 984                 wacom->led.img_lum = 0;
 985
 986                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 987                                            &cintiq_led_attr_group);
 988                 break;
 989
 990         case INTUOS5S:
 991         case INTUOS5:
 992         case INTUOS5L:
 993         case INTUOSPS:
 994         case INTUOSPM:
 995         case INTUOSPL:
 996                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN) {
 997                         wacom->led.select[0] = 0;
 998                         wacom->led.select[1] = 0;
 999                         wacom->led.llv = 32;
1000                         wacom->led.hlv = 0;
1001                         wacom->led.img_lum = 0;
1002
1003                         error = sysfs_create_group(&wacom->intf->dev.kobj,
1004                                                   &intuos5_led_attr_group);
1005                 } else
1006                         return 0;
1007                 break;
1008
1009         default:
1010                 return 0;
1011         }
1012
1013         if (error) {
1014                 dev_err(&wacom->intf->dev,
1015                         "cannot create sysfs group err: %d\n", error);
1016                 return error;
1017         }
1018         wacom_led_control(wacom);
1019
1020         return 0;
1021 }
1022
1023 static void wacom_destroy_leds(struct wacom *wacom)
1024 {
1025         switch (wacom->wacom_wac.features.type) {
1026         case INTUOS4S:
1027         case INTUOS4:
1028         case INTUOS4L:
1029                 sysfs_remove_group(&wacom->intf->dev.kobj,
1030                                    &intuos4_led_attr_group);
1031                 break;
1032
1033         case WACOM_24HD:
1034         case WACOM_21UX2:
1035                 sysfs_remove_group(&wacom->intf->dev.kobj,
1036                                    &cintiq_led_attr_group);
1037                 break;
1038
1039         case INTUOS5S:
1040         case INTUOS5:
1041         case INTUOS5L:
1042         case INTUOSPS:
1043         case INTUOSPM:
1044         case INTUOSPL:
1045                 if (wacom->wacom_wac.features.device_type == BTN_TOOL_PEN)
1046                         sysfs_remove_group(&wacom->intf->dev.kobj,
1047                                            &intuos5_led_attr_group);
1048                 break;
1049         }
1050 }
1051
1052 static enum power_supply_property wacom_battery_props[] = {
1053         POWER_SUPPLY_PROP_SCOPE,
1054         POWER_SUPPLY_PROP_CAPACITY
1055 };
1056
1057 static int wacom_battery_get_property(struct power_supply *psy,
1058                                       enum power_supply_property psp,
1059                                       union power_supply_propval *val)
1060 {
1061         struct wacom *wacom = container_of(psy, struct wacom, battery);
1062         int ret = 0;
1063
1064         switch (psp) {
1065                 case POWER_SUPPLY_PROP_SCOPE:
1066                         val->intval = POWER_SUPPLY_SCOPE_DEVICE;
1067                         break;
1068                 case POWER_SUPPLY_PROP_CAPACITY:
1069                         val->intval =
1070                                 wacom->wacom_wac.battery_capacity * 100 / 31;
1071                         break;
1072                 default:
1073                         ret = -EINVAL;
1074                         break;
1075         }
1076
1077         return ret;
1078 }
1079
1080 static int wacom_initialize_battery(struct wacom *wacom)
1081 {
1082         int error = 0;
1083
1084         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1085                 wacom->battery.properties = wacom_battery_props;
1086                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1087                 wacom->battery.get_property = wacom_battery_get_property;
1088                 wacom->battery.name = "wacom_battery";
1089                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1090                 wacom->battery.use_for_apm = 0;
1091
1092                 error = power_supply_register(&wacom->usbdev->dev,
1093                                               &wacom->battery);
1094
1095                 if (!error)
1096                         power_supply_powers(&wacom->battery,
1097                                             &wacom->usbdev->dev);
1098         }
1099
1100         return error;
1101 }
1102
1103 static void wacom_destroy_battery(struct wacom *wacom)
1104 {
1105         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1106             wacom->battery.dev) {
1107                 power_supply_unregister(&wacom->battery);
1108                 wacom->battery.dev = NULL;
1109         }
1110 }
1111
1112 static int wacom_register_input(struct wacom *wacom)
1113 {
1114         struct input_dev *input_dev;
1115         struct usb_interface *intf = wacom->intf;
1116         struct usb_device *dev = interface_to_usbdev(intf);
1117         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1118         int error;
1119
1120         input_dev = input_allocate_device();
1121         if (!input_dev) {
1122                 error = -ENOMEM;
1123                 goto fail1;
1124         }
1125
1126         input_dev->name = wacom_wac->name;
1127         input_dev->dev.parent = &intf->dev;
1128         input_dev->open = wacom_open;
1129         input_dev->close = wacom_close;
1130         usb_to_input_id(dev, &input_dev->id);
1131         input_set_drvdata(input_dev, wacom);
1132
1133         wacom_wac->input = input_dev;
1134         error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1135         if (error)
1136                 goto fail1;
1137
1138         error = input_register_device(input_dev);
1139         if (error)
1140                 goto fail2;
1141
1142         return 0;
1143
1144 fail2:
1145         input_free_device(input_dev);
1146         wacom_wac->input = NULL;
1147 fail1:
1148         return error;
1149 }
1150
1151 static void wacom_wireless_work(struct work_struct *work)
1152 {
1153         struct wacom *wacom = container_of(work, struct wacom, work);
1154         struct usb_device *usbdev = wacom->usbdev;
1155         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1156         struct wacom *wacom1, *wacom2;
1157         struct wacom_wac *wacom_wac1, *wacom_wac2;
1158         int error;
1159
1160         /*
1161          * Regardless if this is a disconnect or a new tablet,
1162          * remove any existing input and battery devices.
1163          */
1164
1165         wacom_destroy_battery(wacom);
1166
1167         /* Stylus interface */
1168         wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1169         wacom_wac1 = &(wacom1->wacom_wac);
1170         if (wacom_wac1->input)
1171                 input_unregister_device(wacom_wac1->input);
1172         wacom_wac1->input = NULL;
1173
1174         /* Touch interface */
1175         wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1176         wacom_wac2 = &(wacom2->wacom_wac);
1177         if (wacom_wac2->input)
1178                 input_unregister_device(wacom_wac2->input);
1179         wacom_wac2->input = NULL;
1180
1181         if (wacom_wac->pid == 0) {
1182                 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1183         } else {
1184                 const struct usb_device_id *id = wacom_ids;
1185
1186                 dev_info(&wacom->intf->dev,
1187                          "wireless tablet connected with PID %x\n",
1188                          wacom_wac->pid);
1189
1190                 while (id->match_flags) {
1191                         if (id->idVendor == USB_VENDOR_ID_WACOM &&
1192                             id->idProduct == wacom_wac->pid)
1193                                 break;
1194                         id++;
1195                 }
1196
1197                 if (!id->match_flags) {
1198                         dev_info(&wacom->intf->dev,
1199                                  "ignoring unknown PID.\n");
1200                         return;
1201                 }
1202
1203                 /* Stylus interface */
1204                 wacom_wac1->features =
1205                         *((struct wacom_features *)id->driver_info);
1206                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1207                 snprintf(wacom_wac1->name, WACOM_NAME_MAX, "%s (WL) Pen",
1208                          wacom_wac1->features.name);
1209                 wacom_wac1->shared->touch_max = wacom_wac1->features.touch_max;
1210                 wacom_wac1->shared->type = wacom_wac1->features.type;
1211                 error = wacom_register_input(wacom1);
1212                 if (error)
1213                         goto fail;
1214
1215                 /* Touch interface */
1216                 if (wacom_wac1->features.touch_max ||
1217                     wacom_wac1->features.type == INTUOSHT) {
1218                         wacom_wac2->features =
1219                                 *((struct wacom_features *)id->driver_info);
1220                         wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1221                         wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1222                         wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1223                         if (wacom_wac2->features.touch_max)
1224                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1225                                          "%s (WL) Finger",wacom_wac2->features.name);
1226                         else
1227                                 snprintf(wacom_wac2->name, WACOM_NAME_MAX,
1228                                          "%s (WL) Pad",wacom_wac2->features.name);
1229                         error = wacom_register_input(wacom2);
1230                         if (error)
1231                                 goto fail;
1232
1233                         if (wacom_wac1->features.type == INTUOSHT &&
1234                             wacom_wac1->features.touch_max)
1235                                 wacom_wac->shared->touch_input = wacom_wac2->input;
1236                 }
1237
1238                 error = wacom_initialize_battery(wacom);
1239                 if (error)
1240                         goto fail;
1241         }
1242
1243         return;
1244
1245 fail:
1246         if (wacom_wac2->input) {
1247                 input_unregister_device(wacom_wac2->input);
1248                 wacom_wac2->input = NULL;
1249         }
1250
1251         if (wacom_wac1->input) {
1252                 input_unregister_device(wacom_wac1->input);
1253                 wacom_wac1->input = NULL;
1254         }
1255         return;
1256 }
1257
1258 /*
1259  * Not all devices report physical dimensions from HID.
1260  * Compute the default from hardcoded logical dimension
1261  * and resolution before driver overwrites them.
1262  */
1263 static void wacom_set_default_phy(struct wacom_features *features)
1264 {
1265         if (features->x_resolution) {
1266                 features->x_phy = (features->x_max * 100) /
1267                                         features->x_resolution;
1268                 features->y_phy = (features->y_max * 100) /
1269                                         features->y_resolution;
1270         }
1271 }
1272
1273 static void wacom_calculate_res(struct wacom_features *features)
1274 {
1275         features->x_resolution = wacom_calc_hid_res(features->x_max,
1276                                                     features->x_phy,
1277                                                     features->unit,
1278                                                     features->unitExpo);
1279         features->y_resolution = wacom_calc_hid_res(features->y_max,
1280                                                     features->y_phy,
1281                                                     features->unit,
1282                                                     features->unitExpo);
1283 }
1284
1285 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1286 {
1287         struct usb_device *dev = interface_to_usbdev(intf);
1288         struct usb_endpoint_descriptor *endpoint;
1289         struct wacom *wacom;
1290         struct wacom_wac *wacom_wac;
1291         struct wacom_features *features;
1292         int error;
1293
1294         if (!id->driver_info)
1295                 return -EINVAL;
1296
1297         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1298         if (!wacom)
1299                 return -ENOMEM;
1300
1301         wacom_wac = &wacom->wacom_wac;
1302         wacom_wac->features = *((struct wacom_features *)id->driver_info);
1303         features = &wacom_wac->features;
1304         if (features->pktlen > WACOM_PKGLEN_MAX) {
1305                 error = -EINVAL;
1306                 goto fail1;
1307         }
1308
1309         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1310                                              GFP_KERNEL, &wacom->data_dma);
1311         if (!wacom_wac->data) {
1312                 error = -ENOMEM;
1313                 goto fail1;
1314         }
1315
1316         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1317         if (!wacom->irq) {
1318                 error = -ENOMEM;
1319                 goto fail2;
1320         }
1321
1322         wacom->usbdev = dev;
1323         wacom->intf = intf;
1324         mutex_init(&wacom->lock);
1325         INIT_WORK(&wacom->work, wacom_wireless_work);
1326         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1327         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1328
1329         endpoint = &intf->cur_altsetting->endpoint[0].desc;
1330
1331         /* set the default size in case we do not get them from hid */
1332         wacom_set_default_phy(features);
1333
1334         /* Retrieve the physical and logical size for touch devices */
1335         error = wacom_retrieve_hid_descriptor(intf, features);
1336         if (error)
1337                 goto fail3;
1338
1339         /*
1340          * Intuos5 has no useful data about its touch interface in its
1341          * HID descriptor. If this is the touch interface (wMaxPacketSize
1342          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1343          */
1344         if (features->type >= INTUOS5S && features->type <= INTUOSHT) {
1345                 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1346                         features->device_type = BTN_TOOL_FINGER;
1347                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1348
1349                         features->x_max = 4096;
1350                         features->y_max = 4096;
1351                 } else {
1352                         features->device_type = BTN_TOOL_PEN;
1353                 }
1354         }
1355
1356         wacom_setup_device_quirks(features);
1357
1358         /* set unit to "100th of a mm" for devices not reported by HID */
1359         if (!features->unit) {
1360                 features->unit = 0x11;
1361                 features->unitExpo = 16 - 3;
1362         }
1363         wacom_calculate_res(features);
1364
1365         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1366
1367         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1368                 struct usb_device *other_dev;
1369
1370                 /* Append the device type to the name */
1371                 if (features->device_type != BTN_TOOL_FINGER)
1372                         strlcat(wacom_wac->name, " Pen", WACOM_NAME_MAX);
1373                 else if (features->touch_max)
1374                         strlcat(wacom_wac->name, " Finger", WACOM_NAME_MAX);
1375                 else
1376                         strlcat(wacom_wac->name, " Pad", WACOM_NAME_MAX);
1377
1378                 other_dev = wacom_get_sibling(dev, features->oVid, features->oPid);
1379                 if (other_dev == NULL || wacom_get_usbdev_data(other_dev) == NULL)
1380                         other_dev = dev;
1381                 error = wacom_add_shared_data(wacom_wac, other_dev);
1382                 if (error)
1383                         goto fail3;
1384         }
1385
1386         usb_fill_int_urb(wacom->irq, dev,
1387                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1388                          wacom_wac->data, features->pktlen,
1389                          wacom_sys_irq, wacom, endpoint->bInterval);
1390         wacom->irq->transfer_dma = wacom->data_dma;
1391         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1392
1393         error = wacom_initialize_leds(wacom);
1394         if (error)
1395                 goto fail4;
1396
1397         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1398                 error = wacom_register_input(wacom);
1399                 if (error)
1400                         goto fail5;
1401         }
1402
1403         /* Note that if query fails it is not a hard failure */
1404         wacom_query_tablet_data(intf, features);
1405
1406         usb_set_intfdata(intf, wacom);
1407
1408         if (features->quirks & WACOM_QUIRK_MONITOR) {
1409                 if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
1410                         error = -EIO;
1411                         goto fail5;
1412                 }
1413         }
1414
1415         if (wacom_wac->features.type == INTUOSHT && wacom_wac->features.touch_max) {
1416                 if (wacom_wac->features.device_type == BTN_TOOL_FINGER)
1417                         wacom_wac->shared->touch_input = wacom_wac->input;
1418         }
1419
1420         return 0;
1421
1422  fail5: wacom_destroy_leds(wacom);
1423  fail4: wacom_remove_shared_data(wacom_wac);
1424  fail3: usb_free_urb(wacom->irq);
1425  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1426  fail1: kfree(wacom);
1427         return error;
1428 }
1429
1430 static void wacom_disconnect(struct usb_interface *intf)
1431 {
1432         struct wacom *wacom = usb_get_intfdata(intf);
1433
1434         usb_set_intfdata(intf, NULL);
1435
1436         usb_kill_urb(wacom->irq);
1437         cancel_work_sync(&wacom->work);
1438         if (wacom->wacom_wac.input)
1439                 input_unregister_device(wacom->wacom_wac.input);
1440         wacom_destroy_battery(wacom);
1441         wacom_destroy_leds(wacom);
1442         usb_free_urb(wacom->irq);
1443         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1444                         wacom->wacom_wac.data, wacom->data_dma);
1445         wacom_remove_shared_data(&wacom->wacom_wac);
1446         kfree(wacom);
1447 }
1448
1449 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1450 {
1451         struct wacom *wacom = usb_get_intfdata(intf);
1452
1453         mutex_lock(&wacom->lock);
1454         usb_kill_urb(wacom->irq);
1455         mutex_unlock(&wacom->lock);
1456
1457         return 0;
1458 }
1459
1460 static int wacom_resume(struct usb_interface *intf)
1461 {
1462         struct wacom *wacom = usb_get_intfdata(intf);
1463         struct wacom_features *features = &wacom->wacom_wac.features;
1464         int rv = 0;
1465
1466         mutex_lock(&wacom->lock);
1467
1468         /* switch to wacom mode first */
1469         wacom_query_tablet_data(intf, features);
1470         wacom_led_control(wacom);
1471
1472         if ((wacom->open || (features->quirks & WACOM_QUIRK_MONITOR)) &&
1473             usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1474                 rv = -EIO;
1475
1476         mutex_unlock(&wacom->lock);
1477
1478         return rv;
1479 }
1480
1481 static int wacom_reset_resume(struct usb_interface *intf)
1482 {
1483         return wacom_resume(intf);
1484 }
1485
1486 static struct usb_driver wacom_driver = {
1487         .name =         "wacom",
1488         .id_table =     wacom_ids,
1489         .probe =        wacom_probe,
1490         .disconnect =   wacom_disconnect,
1491         .suspend =      wacom_suspend,
1492         .resume =       wacom_resume,
1493         .reset_resume = wacom_reset_resume,
1494         .supports_autosuspend = 1,
1495 };
1496
1497 module_usb_driver(wacom_driver);