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