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