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 wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
 617 {
 618         struct wacom_usbdev_data *data;
 619
 620         list_for_each_entry(data, &wacom_udev_list, list) {
 621                 if (data->dev == dev) {
 622                         kref_get(&data->kref);
 623                         return data;
 624                 }
 625         }
 626
 627         return NULL;
 628 }
 629
 630 static int wacom_add_shared_data(struct wacom_wac *wacom,
 631                                  struct usb_device *dev)
 632 {
 633         struct wacom_usbdev_data *data;
 634         int retval = 0;
 635
 636         mutex_lock(&wacom_udev_list_lock);
 637
 638         data = wacom_get_usbdev_data(dev);
 639         if (!data) {
 640                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
 641                 if (!data) {
 642                         retval = -ENOMEM;
 643                         goto out;
 644                 }
 645
 646                 kref_init(&data->kref);
 647                 data->dev = dev;
 648                 list_add_tail(&data->list, &wacom_udev_list);
 649         }
 650
 651         wacom->shared = &data->shared;
 652
 653 out:
 654         mutex_unlock(&wacom_udev_list_lock);
 655         return retval;
 656 }
 657
 658 static void wacom_release_shared_data(struct kref *kref)
 659 {
 660         struct wacom_usbdev_data *data =
 661                 container_of(kref, struct wacom_usbdev_data, kref);
 662
 663         mutex_lock(&wacom_udev_list_lock);
 664         list_del(&data->list);
 665         mutex_unlock(&wacom_udev_list_lock);
 666
 667         kfree(data);
 668 }
 669
 670 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 671 {
 672         struct wacom_usbdev_data *data;
 673
 674         if (wacom->shared) {
 675                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
 676                 kref_put(&data->kref, wacom_release_shared_data);
 677                 wacom->shared = NULL;
 678         }
 679 }
 680
 681 static int wacom_led_control(struct wacom *wacom)
 682 {
 683         unsigned char *buf;
 684         int retval;
 685
 686         buf = kzalloc(9, GFP_KERNEL);
 687         if (!buf)
 688                 return -ENOMEM;
 689
 690         if (wacom->wacom_wac.features.type >= INTUOS5S &&
 691             wacom->wacom_wac.features.type <= INTUOS5L) {
 692                 /*
 693                  * Touch Ring and crop mark LED luminance may take on
 694                  * one of four values:
 695                  *    0 = Low; 1 = Medium; 2 = High; 3 = Off
 696                  */
 697                 int ring_led = wacom->led.select[0] & 0x03;
 698                 int ring_lum = (((wacom->led.llv & 0x60) >> 5) - 1) & 0x03;
 699                 int crop_lum = 0;
 700
 701                 buf[0] = WAC_CMD_LED_CONTROL;
 702                 buf[1] = (crop_lum << 4) | (ring_lum << 2) | (ring_led);
 703         }
 704         else {
 705                 int led = wacom->led.select[0] | 0x4;
 706
 707                 if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 708                     wacom->wacom_wac.features.type == WACOM_24HD)
 709                         led |= (wacom->led.select[1] << 4) | 0x40;
 710
 711                 buf[0] = WAC_CMD_LED_CONTROL;
 712                 buf[1] = led;
 713                 buf[2] = wacom->led.llv;
 714                 buf[3] = wacom->led.hlv;
 715                 buf[4] = wacom->led.img_lum;
 716         }
 717
 718         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 719                                   buf, 9, WAC_CMD_RETRIES);
 720         kfree(buf);
 721
 722         return retval;
 723 }
 724
 725 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 726 {
 727         unsigned char *buf;
 728         int i, retval;
 729
 730         buf = kzalloc(259, GFP_KERNEL);
 731         if (!buf)
 732                 return -ENOMEM;
 733
 734         /* Send 'start' command */
 735         buf[0] = WAC_CMD_ICON_START;
 736         buf[1] = 1;
 737         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 738                                   buf, 2, WAC_CMD_RETRIES);
 739         if (retval < 0)
 740                 goto out;
 741
 742         buf[0] = WAC_CMD_ICON_XFER;
 743         buf[1] = button_id & 0x07;
 744         for (i = 0; i < 4; i++) {
 745                 buf[2] = i;
 746                 memcpy(buf + 3, img + i * 256, 256);
 747
 748                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 749                                           buf, 259, WAC_CMD_RETRIES);
 750                 if (retval < 0)
 751                         break;
 752         }
 753
 754         /* Send 'stop' */
 755         buf[0] = WAC_CMD_ICON_START;
 756         buf[1] = 0;
 757         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 758                          buf, 2, WAC_CMD_RETRIES);
 759
 760 out:
 761         kfree(buf);
 762         return retval;
 763 }
 764
 765 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 766                                       const char *buf, size_t count)
 767 {
 768         struct wacom *wacom = dev_get_drvdata(dev);
 769         unsigned int id;
 770         int err;
 771
 772         err = kstrtouint(buf, 10, &id);
 773         if (err)
 774                 return err;
 775
 776         mutex_lock(&wacom->lock);
 777
 778         wacom->led.select[set_id] = id & 0x3;
 779         err = wacom_led_control(wacom);
 780
 781         mutex_unlock(&wacom->lock);
 782
 783         return err < 0 ? err : count;
 784 }
 785
 786 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 787 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 788         struct device_attribute *attr, const char *buf, size_t count)   \
 789 {                                                                       \
 790         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 791 }                                                                       \
 792 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 793         struct device_attribute *attr, char *buf)                       \
 794 {                                                                       \
 795         struct wacom *wacom = dev_get_drvdata(dev);                     \
 796         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
 797 }                                                                       \
 798 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
 799                     wacom_led##SET_ID##_select_show,                    \
 800                     wacom_led##SET_ID##_select_store)
 801
 802 DEVICE_LED_SELECT_ATTR(0);
 803 DEVICE_LED_SELECT_ATTR(1);
 804
 805 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 806                                      const char *buf, size_t count)
 807 {
 808         unsigned int value;
 809         int err;
 810
 811         err = kstrtouint(buf, 10, &value);
 812         if (err)
 813                 return err;
 814
 815         mutex_lock(&wacom->lock);
 816
 817         *dest = value & 0x7f;
 818         err = wacom_led_control(wacom);
 819
 820         mutex_unlock(&wacom->lock);
 821
 822         return err < 0 ? err : count;
 823 }
 824
 825 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 826 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 827         struct device_attribute *attr, const char *buf, size_t count)   \
 828 {                                                                       \
 829         struct wacom *wacom = dev_get_drvdata(dev);                     \
 830                                                                         \
 831         return wacom_luminance_store(wacom, &wacom->led.field,          \
 832                                      buf, count);                       \
 833 }                                                                       \
 834 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 835                    NULL, wacom_##name##_luminance_store)
 836
 837 DEVICE_LUMINANCE_ATTR(status0, llv);
 838 DEVICE_LUMINANCE_ATTR(status1, hlv);
 839 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 840
 841 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 842                                         const char *buf, size_t count)
 843 {
 844         struct wacom *wacom = dev_get_drvdata(dev);
 845         int err;
 846
 847         if (count != 1024)
 848                 return -EINVAL;
 849
 850         mutex_lock(&wacom->lock);
 851
 852         err = wacom_led_putimage(wacom, button_id, buf);
 853
 854         mutex_unlock(&wacom->lock);
 855
 856         return err < 0 ? err : count;
 857 }
 858
 859 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 860 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 861         struct device_attribute *attr, const char *buf, size_t count)   \
 862 {                                                                       \
 863         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 864 }                                                                       \
 865 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 866                    NULL, wacom_btnimg##BUTTON_ID##_store)
 867
 868 DEVICE_BTNIMG_ATTR(0);
 869 DEVICE_BTNIMG_ATTR(1);
 870 DEVICE_BTNIMG_ATTR(2);
 871 DEVICE_BTNIMG_ATTR(3);
 872 DEVICE_BTNIMG_ATTR(4);
 873 DEVICE_BTNIMG_ATTR(5);
 874 DEVICE_BTNIMG_ATTR(6);
 875 DEVICE_BTNIMG_ATTR(7);
 876
 877 static struct attribute *cintiq_led_attrs[] = {
 878         &dev_attr_status_led0_select.attr,
 879         &dev_attr_status_led1_select.attr,
 880         NULL
 881 };
 882
 883 static struct attribute_group cintiq_led_attr_group = {
 884         .name = "wacom_led",
 885         .attrs = cintiq_led_attrs,
 886 };
 887
 888 static struct attribute *intuos4_led_attrs[] = {
 889         &dev_attr_status0_luminance.attr,
 890         &dev_attr_status1_luminance.attr,
 891         &dev_attr_status_led0_select.attr,
 892         &dev_attr_buttons_luminance.attr,
 893         &dev_attr_button0_rawimg.attr,
 894         &dev_attr_button1_rawimg.attr,
 895         &dev_attr_button2_rawimg.attr,
 896         &dev_attr_button3_rawimg.attr,
 897         &dev_attr_button4_rawimg.attr,
 898         &dev_attr_button5_rawimg.attr,
 899         &dev_attr_button6_rawimg.attr,
 900         &dev_attr_button7_rawimg.attr,
 901         NULL
 902 };
 903
 904 static struct attribute_group intuos4_led_attr_group = {
 905         .name = "wacom_led",
 906         .attrs = intuos4_led_attrs,
 907 };
 908
 909 static struct attribute *intuos5_led_attrs[] = {
 910         &dev_attr_status0_luminance.attr,
 911         &dev_attr_status_led0_select.attr,
 912         NULL
 913 };
 914
 915 static struct attribute_group intuos5_led_attr_group = {
 916         .name = "wacom_led",
 917         .attrs = intuos5_led_attrs,
 918 };
 919
 920 static int wacom_initialize_leds(struct wacom *wacom)
 921 {
 922         int error;
 923
 924         /* Initialize default values */
 925         switch (wacom->wacom_wac.features.type) {
 926         case INTUOS4S:
 927         case INTUOS4:
 928         case INTUOS4L:
 929                 wacom->led.select[0] = 0;
 930                 wacom->led.select[1] = 0;
 931                 wacom->led.llv = 10;
 932                 wacom->led.hlv = 20;
 933                 wacom->led.img_lum = 10;
 934                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 935                                            &intuos4_led_attr_group);
 936                 break;
 937
 938         case WACOM_24HD:
 939         case WACOM_21UX2:
 940                 wacom->led.select[0] = 0;
 941                 wacom->led.select[1] = 0;
 942                 wacom->led.llv = 0;
 943                 wacom->led.hlv = 0;
 944                 wacom->led.img_lum = 0;
 945
 946                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 947                                            &cintiq_led_attr_group);
 948                 break;
 949
 950         case INTUOS5S:
 951         case INTUOS5:
 952         case INTUOS5L:
 953                 wacom->led.select[0] = 0;
 954                 wacom->led.select[1] = 0;
 955                 wacom->led.llv = 32;
 956                 wacom->led.hlv = 0;
 957                 wacom->led.img_lum = 0;
 958
 959                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 960                                            &intuos5_led_attr_group);
 961                 break;
 962
 963         default:
 964                 return 0;
 965         }
 966
 967         if (error) {
 968                 dev_err(&wacom->intf->dev,
 969                         "cannot create sysfs group err: %d\n", error);
 970                 return error;
 971         }
 972         wacom_led_control(wacom);
 973
 974         return 0;
 975 }
 976
 977 static void wacom_destroy_leds(struct wacom *wacom)
 978 {
 979         switch (wacom->wacom_wac.features.type) {
 980         case INTUOS4S:
 981         case INTUOS4:
 982         case INTUOS4L:
 983                 sysfs_remove_group(&wacom->intf->dev.kobj,
 984                                    &intuos4_led_attr_group);
 985                 break;
 986
 987         case WACOM_24HD:
 988         case WACOM_21UX2:
 989                 sysfs_remove_group(&wacom->intf->dev.kobj,
 990                                    &cintiq_led_attr_group);
 991                 break;
 992
 993         case INTUOS5S:
 994         case INTUOS5:
 995         case INTUOS5L:
 996                 sysfs_remove_group(&wacom->intf->dev.kobj,
 997                                    &intuos5_led_attr_group);
 998                 break;
 999         }
1000 }
1001
1002 static enum power_supply_property wacom_battery_props[] = {
1003         POWER_SUPPLY_PROP_CAPACITY
1004 };
1005
1006 static int wacom_battery_get_property(struct power_supply *psy,
1007                                       enum power_supply_property psp,
1008                                       union power_supply_propval *val)
1009 {
1010         struct wacom *wacom = container_of(psy, struct wacom, battery);
1011         int ret = 0;
1012
1013         switch (psp) {
1014                 case POWER_SUPPLY_PROP_CAPACITY:
1015                         val->intval =
1016                                 wacom->wacom_wac.battery_capacity * 100 / 31;
1017                         break;
1018                 default:
1019                         ret = -EINVAL;
1020                         break;
1021         }
1022
1023         return ret;
1024 }
1025
1026 static int wacom_initialize_battery(struct wacom *wacom)
1027 {
1028         int error = 0;
1029
1030         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR) {
1031                 wacom->battery.properties = wacom_battery_props;
1032                 wacom->battery.num_properties = ARRAY_SIZE(wacom_battery_props);
1033                 wacom->battery.get_property = wacom_battery_get_property;
1034                 wacom->battery.name = "wacom_battery";
1035                 wacom->battery.type = POWER_SUPPLY_TYPE_BATTERY;
1036                 wacom->battery.use_for_apm = 0;
1037
1038                 error = power_supply_register(&wacom->usbdev->dev,
1039                                               &wacom->battery);
1040
1041                 if (!error)
1042                         power_supply_powers(&wacom->battery,
1043                                             &wacom->usbdev->dev);
1044         }
1045
1046         return error;
1047 }
1048
1049 static void wacom_destroy_battery(struct wacom *wacom)
1050 {
1051         if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_MONITOR &&
1052             wacom->battery.dev) {
1053                 power_supply_unregister(&wacom->battery);
1054                 wacom->battery.dev = NULL;
1055         }
1056 }
1057
1058 static int wacom_register_input(struct wacom *wacom)
1059 {
1060         struct input_dev *input_dev;
1061         struct usb_interface *intf = wacom->intf;
1062         struct usb_device *dev = interface_to_usbdev(intf);
1063         struct wacom_wac *wacom_wac = &(wacom->wacom_wac);
1064         int error;
1065
1066         input_dev = input_allocate_device();
1067         if (!input_dev) {
1068                 error = -ENOMEM;
1069                 goto fail1;
1070         }
1071
1072         input_dev->name = wacom_wac->name;
1073         input_dev->dev.parent = &intf->dev;
1074         input_dev->open = wacom_open;
1075         input_dev->close = wacom_close;
1076         usb_to_input_id(dev, &input_dev->id);
1077         input_set_drvdata(input_dev, wacom);
1078
1079         wacom_wac->input = input_dev;
1080         error = wacom_setup_input_capabilities(input_dev, wacom_wac);
1081         if (error)
1082                 goto fail1;
1083
1084         error = input_register_device(input_dev);
1085         if (error)
1086                 goto fail2;
1087
1088         return 0;
1089
1090 fail2:
1091         input_free_device(input_dev);
1092         wacom_wac->input = NULL;
1093 fail1:
1094         return error;
1095 }
1096
1097 static void wacom_wireless_work(struct work_struct *work)
1098 {
1099         struct wacom *wacom = container_of(work, struct wacom, work);
1100         struct usb_device *usbdev = wacom->usbdev;
1101         struct wacom_wac *wacom_wac = &wacom->wacom_wac;
1102         struct wacom *wacom1, *wacom2;
1103         struct wacom_wac *wacom_wac1, *wacom_wac2;
1104         int error;
1105
1106         /*
1107          * Regardless if this is a disconnect or a new tablet,
1108          * remove any existing input and battery devices.
1109          */
1110
1111         wacom_destroy_battery(wacom);
1112
1113         /* Stylus interface */
1114         wacom1 = usb_get_intfdata(usbdev->config->interface[1]);
1115         wacom_wac1 = &(wacom1->wacom_wac);
1116         if (wacom_wac1->input)
1117                 input_unregister_device(wacom_wac1->input);
1118         wacom_wac1->input = NULL;
1119
1120         /* Touch interface */
1121         wacom2 = usb_get_intfdata(usbdev->config->interface[2]);
1122         wacom_wac2 = &(wacom2->wacom_wac);
1123         if (wacom_wac2->input)
1124                 input_unregister_device(wacom_wac2->input);
1125         wacom_wac2->input = NULL;
1126
1127         if (wacom_wac->pid == 0) {
1128                 dev_info(&wacom->intf->dev, "wireless tablet disconnected\n");
1129         } else {
1130                 const struct usb_device_id *id = wacom_ids;
1131
1132                 dev_info(&wacom->intf->dev,
1133                          "wireless tablet connected with PID %x\n",
1134                          wacom_wac->pid);
1135
1136                 while (id->match_flags) {
1137                         if (id->idVendor == USB_VENDOR_ID_WACOM &&
1138                             id->idProduct == wacom_wac->pid)
1139                                 break;
1140                         id++;
1141                 }
1142
1143                 if (!id->match_flags) {
1144                         dev_info(&wacom->intf->dev,
1145                                  "ignoring unknown PID.\n");
1146                         return;
1147                 }
1148
1149                 /* Stylus interface */
1150                 wacom_wac1->features =
1151                         *((struct wacom_features *)id->driver_info);
1152                 wacom_wac1->features.device_type = BTN_TOOL_PEN;
1153                 error = wacom_register_input(wacom1);
1154                 if (error)
1155                         goto fail1;
1156
1157                 /* Touch interface */
1158                 wacom_wac2->features =
1159                         *((struct wacom_features *)id->driver_info);
1160                 wacom_wac2->features.pktlen = WACOM_PKGLEN_BBTOUCH3;
1161                 wacom_wac2->features.device_type = BTN_TOOL_FINGER;
1162                 wacom_set_phy_from_res(&wacom_wac2->features);
1163                 wacom_wac2->features.x_max = wacom_wac2->features.y_max = 4096;
1164                 error = wacom_register_input(wacom2);
1165                 if (error)
1166                         goto fail2;
1167
1168                 error = wacom_initialize_battery(wacom);
1169                 if (error)
1170                         goto fail3;
1171         }
1172
1173         return;
1174
1175 fail3:
1176         input_unregister_device(wacom_wac2->input);
1177         wacom_wac2->input = NULL;
1178 fail2:
1179         input_unregister_device(wacom_wac1->input);
1180         wacom_wac1->input = NULL;
1181 fail1:
1182         return;
1183 }
1184
1185 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
1186 {
1187         struct usb_device *dev = interface_to_usbdev(intf);
1188         struct usb_endpoint_descriptor *endpoint;
1189         struct wacom *wacom;
1190         struct wacom_wac *wacom_wac;
1191         struct wacom_features *features;
1192         int error;
1193
1194         if (!id->driver_info)
1195                 return -EINVAL;
1196
1197         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
1198         if (!wacom)
1199                 return -ENOMEM;
1200
1201         wacom_wac = &wacom->wacom_wac;
1202         wacom_wac->features = *((struct wacom_features *)id->driver_info);
1203         features = &wacom_wac->features;
1204         if (features->pktlen > WACOM_PKGLEN_MAX) {
1205                 error = -EINVAL;
1206                 goto fail1;
1207         }
1208
1209         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
1210                                              GFP_KERNEL, &wacom->data_dma);
1211         if (!wacom_wac->data) {
1212                 error = -ENOMEM;
1213                 goto fail1;
1214         }
1215
1216         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
1217         if (!wacom->irq) {
1218                 error = -ENOMEM;
1219                 goto fail2;
1220         }
1221
1222         wacom->usbdev = dev;
1223         wacom->intf = intf;
1224         mutex_init(&wacom->lock);
1225         INIT_WORK(&wacom->work, wacom_wireless_work);
1226         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
1227         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
1228
1229         endpoint = &intf->cur_altsetting->endpoint[0].desc;
1230
1231         /* Retrieve the physical and logical size for touch devices */
1232         error = wacom_retrieve_hid_descriptor(intf, features);
1233         if (error)
1234                 goto fail3;
1235
1236         /*
1237          * Intuos5 has no useful data about its touch interface in its
1238          * HID descriptor. If this is the touch interface (wMaxPacketSize
1239          * of WACOM_PKGLEN_BBTOUCH3), override the table values.
1240          */
1241         if (features->type >= INTUOS5S && features->type <= INTUOS5L) {
1242                 if (endpoint->wMaxPacketSize == WACOM_PKGLEN_BBTOUCH3) {
1243                         features->device_type = BTN_TOOL_FINGER;
1244                         features->pktlen = WACOM_PKGLEN_BBTOUCH3;
1245
1246                         wacom_set_phy_from_res(features);
1247
1248                         features->x_max = 4096;
1249                         features->y_max = 4096;
1250                 } else {
1251                         features->device_type = BTN_TOOL_PEN;
1252                 }
1253         }
1254
1255         wacom_setup_device_quirks(features);
1256
1257         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
1258
1259         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
1260                 /* Append the device type to the name */
1261                 strlcat(wacom_wac->name,
1262                         features->device_type == BTN_TOOL_PEN ?
1263                                 " Pen" : " Finger",
1264                         sizeof(wacom_wac->name));
1265
1266                 error = wacom_add_shared_data(wacom_wac, dev);
1267                 if (error)
1268                         goto fail3;
1269         }
1270
1271         usb_fill_int_urb(wacom->irq, dev,
1272                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
1273                          wacom_wac->data, features->pktlen,
1274                          wacom_sys_irq, wacom, endpoint->bInterval);
1275         wacom->irq->transfer_dma = wacom->data_dma;
1276         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1277
1278         error = wacom_initialize_leds(wacom);
1279         if (error)
1280                 goto fail4;
1281
1282         if (!(features->quirks & WACOM_QUIRK_NO_INPUT)) {
1283                 error = wacom_register_input(wacom);
1284                 if (error)
1285                         goto fail5;
1286         }
1287
1288         /* Note that if query fails it is not a hard failure */
1289         wacom_query_tablet_data(intf, features);
1290
1291         usb_set_intfdata(intf, wacom);
1292
1293         if (features->quirks & WACOM_QUIRK_MONITOR) {
1294                 if (usb_submit_urb(wacom->irq, GFP_KERNEL))
1295                         goto fail5;
1296         }
1297
1298         return 0;
1299
1300  fail5: wacom_destroy_leds(wacom);
1301  fail4: wacom_remove_shared_data(wacom_wac);
1302  fail3: usb_free_urb(wacom->irq);
1303  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
1304  fail1: kfree(wacom);
1305         return error;
1306 }
1307
1308 static void wacom_disconnect(struct usb_interface *intf)
1309 {
1310         struct wacom *wacom = usb_get_intfdata(intf);
1311
1312         usb_set_intfdata(intf, NULL);
1313
1314         usb_kill_urb(wacom->irq);
1315         cancel_work_sync(&wacom->work);
1316         if (wacom->wacom_wac.input)
1317                 input_unregister_device(wacom->wacom_wac.input);
1318         wacom_destroy_battery(wacom);
1319         wacom_destroy_leds(wacom);
1320         usb_free_urb(wacom->irq);
1321         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
1322                         wacom->wacom_wac.data, wacom->data_dma);
1323         wacom_remove_shared_data(&wacom->wacom_wac);
1324         kfree(wacom);
1325 }
1326
1327 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
1328 {
1329         struct wacom *wacom = usb_get_intfdata(intf);
1330
1331         mutex_lock(&wacom->lock);
1332         usb_kill_urb(wacom->irq);
1333         mutex_unlock(&wacom->lock);
1334
1335         return 0;
1336 }
1337
1338 static int wacom_resume(struct usb_interface *intf)
1339 {
1340         struct wacom *wacom = usb_get_intfdata(intf);
1341         struct wacom_features *features = &wacom->wacom_wac.features;
1342         int rv = 0;
1343
1344         mutex_lock(&wacom->lock);
1345
1346         /* switch to wacom mode first */
1347         wacom_query_tablet_data(intf, features);
1348         wacom_led_control(wacom);
1349
1350         if ((wacom->open || features->quirks & WACOM_QUIRK_MONITOR)
1351              && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
1352                 rv = -EIO;
1353
1354         mutex_unlock(&wacom->lock);
1355
1356         return rv;
1357 }
1358
1359 static int wacom_reset_resume(struct usb_interface *intf)
1360 {
1361         return wacom_resume(intf);
1362 }
1363
1364 static struct usb_driver wacom_driver = {
1365         .name =         "wacom",
1366         .id_table =     wacom_ids,
1367         .probe =        wacom_probe,
1368         .disconnect =   wacom_disconnect,
1369         .suspend =      wacom_suspend,
1370         .resume =       wacom_resume,
1371         .reset_resume = wacom_reset_resume,
1372         .supports_autosuspend = 1,
1373 };
1374
1375 module_usb_driver(wacom_driver);