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