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