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_COLLECTION                  0xa1
  32 #define HID_COLLECTION_LOGICAL          0x02
  33 #define HID_COLLECTION_END              0xc0
  34
  35 enum {
  36         WCM_UNDEFINED = 0,
  37         WCM_DESKTOP,
  38         WCM_DIGITIZER,
  39 };
  40
  41 struct hid_descriptor {
  42         struct usb_descriptor_header header;
  43         __le16   bcdHID;
  44         u8       bCountryCode;
  45         u8       bNumDescriptors;
  46         u8       bDescriptorType;
  47         __le16   wDescriptorLength;
  48 } __attribute__ ((packed));
  49
  50 /* defines to get/set USB message */
  51 #define USB_REQ_GET_REPORT      0x01
  52 #define USB_REQ_SET_REPORT      0x09
  53
  54 #define WAC_HID_FEATURE_REPORT  0x03
  55 #define WAC_MSG_RETRIES         5
  56
  57 #define WAC_CMD_LED_CONTROL     0x20
  58 #define WAC_CMD_ICON_START      0x21
  59 #define WAC_CMD_ICON_XFER       0x23
  60 #define WAC_CMD_RETRIES         10
  61
  62 static int wacom_get_report(struct usb_interface *intf, u8 type, u8 id,
  63                             void *buf, size_t size, unsigned int retries)
  64 {
  65         struct usb_device *dev = interface_to_usbdev(intf);
  66         int retval;
  67
  68         do {
  69                 retval = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  70                                 USB_REQ_GET_REPORT,
  71                                 USB_DIR_IN | USB_TYPE_CLASS |
  72                                 USB_RECIP_INTERFACE,
  73                                 (type << 8) + id,
  74                                 intf->altsetting[0].desc.bInterfaceNumber,
  75                                 buf, size, 100);
  76         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  77
  78         return retval;
  79 }
  80
  81 static int wacom_set_report(struct usb_interface *intf, u8 type, u8 id,
  82                             void *buf, size_t size, unsigned int retries)
  83 {
  84         struct usb_device *dev = interface_to_usbdev(intf);
  85         int retval;
  86
  87         do {
  88                 retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  89                                 USB_REQ_SET_REPORT,
  90                                 USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  91                                 (type << 8) + id,
  92                                 intf->altsetting[0].desc.bInterfaceNumber,
  93                                 buf, size, 1000);
  94         } while ((retval == -ETIMEDOUT || retval == -EPIPE) && --retries);
  95
  96         return retval;
  97 }
  98
  99 static void wacom_sys_irq(struct urb *urb)
 100 {
 101         struct wacom *wacom = urb->context;
 102         int retval;
 103
 104         switch (urb->status) {
 105         case 0:
 106                 /* success */
 107                 break;
 108         case -ECONNRESET:
 109         case -ENOENT:
 110         case -ESHUTDOWN:
 111                 /* this urb is terminated, clean up */
 112                 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
 113                 return;
 114         default:
 115                 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
 116                 goto exit;
 117         }
 118
 119         wacom_wac_irq(&wacom->wacom_wac, urb->actual_length);
 120
 121  exit:
 122         usb_mark_last_busy(wacom->usbdev);
 123         retval = usb_submit_urb(urb, GFP_ATOMIC);
 124         if (retval)
 125                 err ("%s - usb_submit_urb failed with result %d",
 126                      __func__, retval);
 127 }
 128
 129 static int wacom_open(struct input_dev *dev)
 130 {
 131         struct wacom *wacom = input_get_drvdata(dev);
 132         int retval = 0;
 133
 134         if (usb_autopm_get_interface(wacom->intf) < 0)
 135                 return -EIO;
 136
 137         mutex_lock(&wacom->lock);
 138
 139         if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
 140                 retval = -EIO;
 141                 goto out;
 142         }
 143
 144         wacom->open = true;
 145         wacom->intf->needs_remote_wakeup = 1;
 146
 147 out:
 148         mutex_unlock(&wacom->lock);
 149         usb_autopm_put_interface(wacom->intf);
 150         return retval;
 151 }
 152
 153 static void wacom_close(struct input_dev *dev)
 154 {
 155         struct wacom *wacom = input_get_drvdata(dev);
 156         int autopm_error;
 157
 158         autopm_error = usb_autopm_get_interface(wacom->intf);
 159
 160         mutex_lock(&wacom->lock);
 161         usb_kill_urb(wacom->irq);
 162         wacom->open = false;
 163         wacom->intf->needs_remote_wakeup = 0;
 164         mutex_unlock(&wacom->lock);
 165
 166         if (!autopm_error)
 167                 usb_autopm_put_interface(wacom->intf);
 168 }
 169
 170 static int wacom_parse_logical_collection(unsigned char *report,
 171                                           struct wacom_features *features)
 172 {
 173         int length = 0;
 174
 175         if (features->type == BAMBOO_PT) {
 176
 177                 /* Logical collection is only used by 3rd gen Bamboo Touch */
 178                 features->pktlen = WACOM_PKGLEN_BBTOUCH3;
 179                 features->device_type = BTN_TOOL_DOUBLETAP;
 180
 181                 /*
 182                  * Stylus and Touch have same active area
 183                  * so compute physical size based on stylus
 184                  * data before its overwritten.
 185                  */
 186                 features->x_phy =
 187                         (features->x_max * features->x_resolution) / 100;
 188                 features->y_phy =
 189                         (features->y_max * features->y_resolution) / 100;
 190
 191                 features->x_max = features->y_max =
 192                         get_unaligned_le16(&report[10]);
 193
 194                 length = 11;
 195         }
 196         return length;
 197 }
 198
 199 /*
 200  * Interface Descriptor of wacom devices can be incomplete and
 201  * inconsistent so wacom_features table is used to store stylus
 202  * device's packet lengths, various maximum values, and tablet
 203  * resolution based on product ID's.
 204  *
 205  * For devices that contain 2 interfaces, wacom_features table is
 206  * inaccurate for the touch interface.  Since the Interface Descriptor
 207  * for touch interfaces has pretty complete data, this function exists
 208  * to query tablet for this missing information instead of hard coding in
 209  * an additional table.
 210  *
 211  * A typical Interface Descriptor for a stylus will contain a
 212  * boot mouse application collection that is not of interest and this
 213  * function will ignore it.
 214  *
 215  * It also contains a digitizer application collection that also is not
 216  * of interest since any information it contains would be duplicate
 217  * of what is in wacom_features. Usually it defines a report of an array
 218  * of bytes that could be used as max length of the stylus packet returned.
 219  * If it happens to define a Digitizer-Stylus Physical Collection then
 220  * the X and Y logical values contain valid data but it is ignored.
 221  *
 222  * A typical Interface Descriptor for a touch interface will contain a
 223  * Digitizer-Finger Physical Collection which will define both logical
 224  * X/Y maximum as well as the physical size of tablet. Since touch
 225  * interfaces haven't supported pressure or distance, this is enough
 226  * information to override invalid values in the wacom_features table.
 227  *
 228  * 3rd gen Bamboo Touch no longer define a Digitizer-Finger Pysical
 229  * Collection. Instead they define a Logical Collection with a single
 230  * Logical Maximum for both X and Y.
 231  */
 232 static int wacom_parse_hid(struct usb_interface *intf,
 233                            struct hid_descriptor *hid_desc,
 234                            struct wacom_features *features)
 235 {
 236         struct usb_device *dev = interface_to_usbdev(intf);
 237         char limit = 0;
 238         /* result has to be defined as int for some devices */
 239         int result = 0;
 240         int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
 241         unsigned char *report;
 242
 243         report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
 244         if (!report)
 245                 return -ENOMEM;
 246
 247         /* retrive report descriptors */
 248         do {
 249                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 250                         USB_REQ_GET_DESCRIPTOR,
 251                         USB_RECIP_INTERFACE | USB_DIR_IN,
 252                         HID_DEVICET_REPORT << 8,
 253                         intf->altsetting[0].desc.bInterfaceNumber, /* interface */
 254                         report,
 255                         hid_desc->wDescriptorLength,
 256                         5000); /* 5 secs */
 257         } while (result < 0 && limit++ < WAC_MSG_RETRIES);
 258
 259         /* No need to parse the Descriptor. It isn't an error though */
 260         if (result < 0)
 261                 goto out;
 262
 263         for (i = 0; i < hid_desc->wDescriptorLength; i++) {
 264
 265                 switch (report[i]) {
 266                 case HID_USAGE_PAGE:
 267                         switch (report[i + 1]) {
 268                         case HID_USAGE_PAGE_DIGITIZER:
 269                                 usage = WCM_DIGITIZER;
 270                                 i++;
 271                                 break;
 272
 273                         case HID_USAGE_PAGE_DESKTOP:
 274                                 usage = WCM_DESKTOP;
 275                                 i++;
 276                                 break;
 277                         }
 278                         break;
 279
 280                 case HID_USAGE:
 281                         switch (report[i + 1]) {
 282                         case HID_USAGE_X:
 283                                 if (usage == WCM_DESKTOP) {
 284                                         if (finger) {
 285                                                 features->device_type = BTN_TOOL_FINGER;
 286                                                 if (features->type == TABLETPC2FG) {
 287                                                         /* need to reset back */
 288                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 289                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 290                                                 }
 291                                                 if (features->type == BAMBOO_PT) {
 292                                                         /* need to reset back */
 293                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
 294                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 295                                                         features->x_phy =
 296                                                                 get_unaligned_le16(&report[i + 5]);
 297                                                         features->x_max =
 298                                                                 get_unaligned_le16(&report[i + 8]);
 299                                                         i += 15;
 300                                                 } else {
 301                                                         features->x_max =
 302                                                                 get_unaligned_le16(&report[i + 3]);
 303                                                         features->x_phy =
 304                                                                 get_unaligned_le16(&report[i + 6]);
 305                                                         features->unit = report[i + 9];
 306                                                         features->unitExpo = report[i + 11];
 307                                                         i += 12;
 308                                                 }
 309                                         } else if (pen) {
 310                                                 /* penabled only accepts exact bytes of data */
 311                                                 if (features->type == TABLETPC2FG)
 312                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 313                                                 features->device_type = BTN_TOOL_PEN;
 314                                                 features->x_max =
 315                                                         get_unaligned_le16(&report[i + 3]);
 316                                                 i += 4;
 317                                         }
 318                                 }
 319                                 break;
 320
 321                         case HID_USAGE_Y:
 322                                 if (usage == WCM_DESKTOP) {
 323                                         if (finger) {
 324                                                 features->device_type = BTN_TOOL_FINGER;
 325                                                 if (features->type == TABLETPC2FG) {
 326                                                         /* need to reset back */
 327                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 328                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 329                                                         features->y_max =
 330                                                                 get_unaligned_le16(&report[i + 3]);
 331                                                         features->y_phy =
 332                                                                 get_unaligned_le16(&report[i + 6]);
 333                                                         i += 7;
 334                                                 } else if (features->type == BAMBOO_PT) {
 335                                                         /* need to reset back */
 336                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
 337                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 338                                                         features->y_phy =
 339                                                                 get_unaligned_le16(&report[i + 3]);
 340                                                         features->y_max =
 341                                                                 get_unaligned_le16(&report[i + 6]);
 342                                                         i += 12;
 343                                                 } else {
 344                                                         features->y_max =
 345                                                                 features->x_max;
 346                                                         features->y_phy =
 347                                                                 get_unaligned_le16(&report[i + 3]);
 348                                                         i += 4;
 349                                                 }
 350                                         } else if (pen) {
 351                                                 /* penabled only accepts exact bytes of data */
 352                                                 if (features->type == TABLETPC2FG)
 353                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 354                                                 features->device_type = BTN_TOOL_PEN;
 355                                                 features->y_max =
 356                                                         get_unaligned_le16(&report[i + 3]);
 357                                                 i += 4;
 358                                         }
 359                                 }
 360                                 break;
 361
 362                         case HID_USAGE_FINGER:
 363                                 finger = 1;
 364                                 i++;
 365                                 break;
 366
 367                         /*
 368                          * Requiring Stylus Usage will ignore boot mouse
 369                          * X/Y values and some cases of invalid Digitizer X/Y
 370                          * values commonly reported.
 371                          */
 372                         case HID_USAGE_STYLUS:
 373                                 pen = 1;
 374                                 i++;
 375                                 break;
 376                         }
 377                         break;
 378
 379                 case HID_COLLECTION_END:
 380                         /* reset UsagePage and Finger */
 381                         finger = usage = 0;
 382                         break;
 383
 384                 case HID_COLLECTION:
 385                         i++;
 386                         switch (report[i]) {
 387                         case HID_COLLECTION_LOGICAL:
 388                                 i += wacom_parse_logical_collection(&report[i],
 389                                                                     features);
 390                                 break;
 391                         }
 392                         break;
 393                 }
 394         }
 395
 396  out:
 397         result = 0;
 398         kfree(report);
 399         return result;
 400 }
 401
 402 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 403 {
 404         unsigned char *rep_data;
 405         int limit = 0, report_id = 2;
 406         int error = -ENOMEM;
 407
 408         rep_data = kmalloc(4, GFP_KERNEL);
 409         if (!rep_data)
 410                 return error;
 411
 412         /* ask to report tablet data if it is MT Tablet PC or
 413          * not a Tablet PC */
 414         if (features->type == TABLETPC2FG) {
 415                 do {
 416                         rep_data[0] = 3;
 417                         rep_data[1] = 4;
 418                         rep_data[2] = 0;
 419                         rep_data[3] = 0;
 420                         report_id = 3;
 421                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 422                                                  report_id, rep_data, 4, 1);
 423                         if (error >= 0)
 424                                 error = wacom_get_report(intf,
 425                                                 WAC_HID_FEATURE_REPORT,
 426                                                 report_id, rep_data, 4, 1);
 427                 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
 428         } else if (features->type != TABLETPC &&
 429                    features->device_type == BTN_TOOL_PEN) {
 430                 do {
 431                         rep_data[0] = 2;
 432                         rep_data[1] = 2;
 433                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 434                                                  report_id, rep_data, 2, 1);
 435                         if (error >= 0)
 436                                 error = wacom_get_report(intf,
 437                                                 WAC_HID_FEATURE_REPORT,
 438                                                 report_id, rep_data, 2, 1);
 439                 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
 440         }
 441
 442         kfree(rep_data);
 443
 444         return error < 0 ? error : 0;
 445 }
 446
 447 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 448                 struct wacom_features *features)
 449 {
 450         int error = 0;
 451         struct usb_host_interface *interface = intf->cur_altsetting;
 452         struct hid_descriptor *hid_desc;
 453
 454         /* default features */
 455         features->device_type = BTN_TOOL_PEN;
 456         features->x_fuzz = 4;
 457         features->y_fuzz = 4;
 458         features->pressure_fuzz = 0;
 459         features->distance_fuzz = 0;
 460
 461         /* only Tablet PCs and Bamboo P&T need to retrieve the info */
 462         if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
 463             (features->type != BAMBOO_PT))
 464                 goto out;
 465
 466         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
 467                 if (usb_get_extra_descriptor(&interface->endpoint[0],
 468                                 HID_DEVICET_REPORT, &hid_desc)) {
 469                         printk("wacom: can not retrieve extra class descriptor\n");
 470                         error = 1;
 471                         goto out;
 472                 }
 473         }
 474         error = wacom_parse_hid(intf, hid_desc, features);
 475         if (error)
 476                 goto out;
 477
 478  out:
 479         return error;
 480 }
 481
 482 struct wacom_usbdev_data {
 483         struct list_head list;
 484         struct kref kref;
 485         struct usb_device *dev;
 486         struct wacom_shared shared;
 487 };
 488
 489 static LIST_HEAD(wacom_udev_list);
 490 static DEFINE_MUTEX(wacom_udev_list_lock);
 491
 492 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
 493 {
 494         struct wacom_usbdev_data *data;
 495
 496         list_for_each_entry(data, &wacom_udev_list, list) {
 497                 if (data->dev == dev) {
 498                         kref_get(&data->kref);
 499                         return data;
 500                 }
 501         }
 502
 503         return NULL;
 504 }
 505
 506 static int wacom_add_shared_data(struct wacom_wac *wacom,
 507                                  struct usb_device *dev)
 508 {
 509         struct wacom_usbdev_data *data;
 510         int retval = 0;
 511
 512         mutex_lock(&wacom_udev_list_lock);
 513
 514         data = wacom_get_usbdev_data(dev);
 515         if (!data) {
 516                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
 517                 if (!data) {
 518                         retval = -ENOMEM;
 519                         goto out;
 520                 }
 521
 522                 kref_init(&data->kref);
 523                 data->dev = dev;
 524                 list_add_tail(&data->list, &wacom_udev_list);
 525         }
 526
 527         wacom->shared = &data->shared;
 528
 529 out:
 530         mutex_unlock(&wacom_udev_list_lock);
 531         return retval;
 532 }
 533
 534 static void wacom_release_shared_data(struct kref *kref)
 535 {
 536         struct wacom_usbdev_data *data =
 537                 container_of(kref, struct wacom_usbdev_data, kref);
 538
 539         mutex_lock(&wacom_udev_list_lock);
 540         list_del(&data->list);
 541         mutex_unlock(&wacom_udev_list_lock);
 542
 543         kfree(data);
 544 }
 545
 546 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 547 {
 548         struct wacom_usbdev_data *data;
 549
 550         if (wacom->shared) {
 551                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
 552                 kref_put(&data->kref, wacom_release_shared_data);
 553                 wacom->shared = NULL;
 554         }
 555 }
 556
 557 static int wacom_led_control(struct wacom *wacom)
 558 {
 559         unsigned char *buf;
 560         int retval, led = 0;
 561
 562         buf = kzalloc(9, GFP_KERNEL);
 563         if (!buf)
 564                 return -ENOMEM;
 565
 566         if (wacom->wacom_wac.features.type == WACOM_21UX2 ||
 567             wacom->wacom_wac.features.type == WACOM_24HD)
 568                 led = (wacom->led.select[1] << 4) | 0x40;
 569
 570         led |=  wacom->led.select[0] | 0x4;
 571
 572         buf[0] = WAC_CMD_LED_CONTROL;
 573         buf[1] = led;
 574         buf[2] = wacom->led.llv;
 575         buf[3] = wacom->led.hlv;
 576         buf[4] = wacom->led.img_lum;
 577
 578         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 579                                   buf, 9, WAC_CMD_RETRIES);
 580         kfree(buf);
 581
 582         return retval;
 583 }
 584
 585 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 586 {
 587         unsigned char *buf;
 588         int i, retval;
 589
 590         buf = kzalloc(259, GFP_KERNEL);
 591         if (!buf)
 592                 return -ENOMEM;
 593
 594         /* Send 'start' command */
 595         buf[0] = WAC_CMD_ICON_START;
 596         buf[1] = 1;
 597         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 598                                   buf, 2, WAC_CMD_RETRIES);
 599         if (retval < 0)
 600                 goto out;
 601
 602         buf[0] = WAC_CMD_ICON_XFER;
 603         buf[1] = button_id & 0x07;
 604         for (i = 0; i < 4; i++) {
 605                 buf[2] = i;
 606                 memcpy(buf + 3, img + i * 256, 256);
 607
 608                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 609                                           buf, 259, WAC_CMD_RETRIES);
 610                 if (retval < 0)
 611                         break;
 612         }
 613
 614         /* Send 'stop' */
 615         buf[0] = WAC_CMD_ICON_START;
 616         buf[1] = 0;
 617         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 618                          buf, 2, WAC_CMD_RETRIES);
 619
 620 out:
 621         kfree(buf);
 622         return retval;
 623 }
 624
 625 static ssize_t wacom_led_select_store(struct device *dev, int set_id,
 626                                       const char *buf, size_t count)
 627 {
 628         struct wacom *wacom = dev_get_drvdata(dev);
 629         unsigned int id;
 630         int err;
 631
 632         err = kstrtouint(buf, 10, &id);
 633         if (err)
 634                 return err;
 635
 636         mutex_lock(&wacom->lock);
 637
 638         wacom->led.select[set_id] = id & 0x3;
 639         err = wacom_led_control(wacom);
 640
 641         mutex_unlock(&wacom->lock);
 642
 643         return err < 0 ? err : count;
 644 }
 645
 646 #define DEVICE_LED_SELECT_ATTR(SET_ID)                                  \
 647 static ssize_t wacom_led##SET_ID##_select_store(struct device *dev,     \
 648         struct device_attribute *attr, const char *buf, size_t count)   \
 649 {                                                                       \
 650         return wacom_led_select_store(dev, SET_ID, buf, count);         \
 651 }                                                                       \
 652 static ssize_t wacom_led##SET_ID##_select_show(struct device *dev,      \
 653         struct device_attribute *attr, char *buf)                       \
 654 {                                                                       \
 655         struct wacom *wacom = dev_get_drvdata(dev);                     \
 656         return snprintf(buf, 2, "%d\n", wacom->led.select[SET_ID]);     \
 657 }                                                                       \
 658 static DEVICE_ATTR(status_led##SET_ID##_select, S_IWUSR | S_IRUSR,      \
 659                     wacom_led##SET_ID##_select_show,                    \
 660                     wacom_led##SET_ID##_select_store)
 661
 662 DEVICE_LED_SELECT_ATTR(0);
 663 DEVICE_LED_SELECT_ATTR(1);
 664
 665 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 666                                      const char *buf, size_t count)
 667 {
 668         unsigned int value;
 669         int err;
 670
 671         err = kstrtouint(buf, 10, &value);
 672         if (err)
 673                 return err;
 674
 675         mutex_lock(&wacom->lock);
 676
 677         *dest = value & 0x7f;
 678         err = wacom_led_control(wacom);
 679
 680         mutex_unlock(&wacom->lock);
 681
 682         return err < 0 ? err : count;
 683 }
 684
 685 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 686 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 687         struct device_attribute *attr, const char *buf, size_t count)   \
 688 {                                                                       \
 689         struct wacom *wacom = dev_get_drvdata(dev);                     \
 690                                                                         \
 691         return wacom_luminance_store(wacom, &wacom->led.field,          \
 692                                      buf, count);                       \
 693 }                                                                       \
 694 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 695                    NULL, wacom_##name##_luminance_store)
 696
 697 DEVICE_LUMINANCE_ATTR(status0, llv);
 698 DEVICE_LUMINANCE_ATTR(status1, hlv);
 699 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 700
 701 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 702                                         const char *buf, size_t count)
 703 {
 704         struct wacom *wacom = dev_get_drvdata(dev);
 705         int err;
 706
 707         if (count != 1024)
 708                 return -EINVAL;
 709
 710         mutex_lock(&wacom->lock);
 711
 712         err = wacom_led_putimage(wacom, button_id, buf);
 713
 714         mutex_unlock(&wacom->lock);
 715
 716         return err < 0 ? err : count;
 717 }
 718
 719 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 720 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 721         struct device_attribute *attr, const char *buf, size_t count)   \
 722 {                                                                       \
 723         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 724 }                                                                       \
 725 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 726                    NULL, wacom_btnimg##BUTTON_ID##_store)
 727
 728 DEVICE_BTNIMG_ATTR(0);
 729 DEVICE_BTNIMG_ATTR(1);
 730 DEVICE_BTNIMG_ATTR(2);
 731 DEVICE_BTNIMG_ATTR(3);
 732 DEVICE_BTNIMG_ATTR(4);
 733 DEVICE_BTNIMG_ATTR(5);
 734 DEVICE_BTNIMG_ATTR(6);
 735 DEVICE_BTNIMG_ATTR(7);
 736
 737 static struct attribute *cintiq_led_attrs[] = {
 738         &dev_attr_status_led0_select.attr,
 739         &dev_attr_status_led1_select.attr,
 740         NULL
 741 };
 742
 743 static struct attribute_group cintiq_led_attr_group = {
 744         .name = "wacom_led",
 745         .attrs = cintiq_led_attrs,
 746 };
 747
 748 static struct attribute *intuos4_led_attrs[] = {
 749         &dev_attr_status0_luminance.attr,
 750         &dev_attr_status1_luminance.attr,
 751         &dev_attr_status_led0_select.attr,
 752         &dev_attr_buttons_luminance.attr,
 753         &dev_attr_button0_rawimg.attr,
 754         &dev_attr_button1_rawimg.attr,
 755         &dev_attr_button2_rawimg.attr,
 756         &dev_attr_button3_rawimg.attr,
 757         &dev_attr_button4_rawimg.attr,
 758         &dev_attr_button5_rawimg.attr,
 759         &dev_attr_button6_rawimg.attr,
 760         &dev_attr_button7_rawimg.attr,
 761         NULL
 762 };
 763
 764 static struct attribute_group intuos4_led_attr_group = {
 765         .name = "wacom_led",
 766         .attrs = intuos4_led_attrs,
 767 };
 768
 769 static int wacom_initialize_leds(struct wacom *wacom)
 770 {
 771         int error;
 772
 773         /* Initialize default values */
 774         switch (wacom->wacom_wac.features.type) {
 775         case INTUOS4:
 776         case INTUOS4L:
 777                 wacom->led.select[0] = 0;
 778                 wacom->led.select[1] = 0;
 779                 wacom->led.llv = 10;
 780                 wacom->led.hlv = 20;
 781                 wacom->led.img_lum = 10;
 782                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 783                                            &intuos4_led_attr_group);
 784                 break;
 785
 786         case WACOM_24HD:
 787         case WACOM_21UX2:
 788                 wacom->led.select[0] = 0;
 789                 wacom->led.select[1] = 0;
 790                 wacom->led.llv = 0;
 791                 wacom->led.hlv = 0;
 792                 wacom->led.img_lum = 0;
 793
 794                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 795                                            &cintiq_led_attr_group);
 796                 break;
 797
 798         default:
 799                 return 0;
 800         }
 801
 802         if (error) {
 803                 dev_err(&wacom->intf->dev,
 804                         "cannot create sysfs group err: %d\n", error);
 805                 return error;
 806         }
 807         wacom_led_control(wacom);
 808
 809         return 0;
 810 }
 811
 812 static void wacom_destroy_leds(struct wacom *wacom)
 813 {
 814         switch (wacom->wacom_wac.features.type) {
 815         case INTUOS4:
 816         case INTUOS4L:
 817                 sysfs_remove_group(&wacom->intf->dev.kobj,
 818                                    &intuos4_led_attr_group);
 819                 break;
 820
 821         case WACOM_24HD:
 822         case WACOM_21UX2:
 823                 sysfs_remove_group(&wacom->intf->dev.kobj,
 824                                    &cintiq_led_attr_group);
 825                 break;
 826         }
 827 }
 828
 829 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 830 {
 831         struct usb_device *dev = interface_to_usbdev(intf);
 832         struct usb_endpoint_descriptor *endpoint;
 833         struct wacom *wacom;
 834         struct wacom_wac *wacom_wac;
 835         struct wacom_features *features;
 836         struct input_dev *input_dev;
 837         int error;
 838
 839         if (!id->driver_info)
 840                 return -EINVAL;
 841
 842         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 843         input_dev = input_allocate_device();
 844         if (!wacom || !input_dev) {
 845                 error = -ENOMEM;
 846                 goto fail1;
 847         }
 848
 849         wacom_wac = &wacom->wacom_wac;
 850         wacom_wac->features = *((struct wacom_features *)id->driver_info);
 851         features = &wacom_wac->features;
 852         if (features->pktlen > WACOM_PKGLEN_MAX) {
 853                 error = -EINVAL;
 854                 goto fail1;
 855         }
 856
 857         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
 858                                              GFP_KERNEL, &wacom->data_dma);
 859         if (!wacom_wac->data) {
 860                 error = -ENOMEM;
 861                 goto fail1;
 862         }
 863
 864         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 865         if (!wacom->irq) {
 866                 error = -ENOMEM;
 867                 goto fail2;
 868         }
 869
 870         wacom->usbdev = dev;
 871         wacom->intf = intf;
 872         mutex_init(&wacom->lock);
 873         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 874         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 875
 876         wacom_wac->input = input_dev;
 877
 878         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 879
 880         /* Retrieve the physical and logical size for OEM devices */
 881         error = wacom_retrieve_hid_descriptor(intf, features);
 882         if (error)
 883                 goto fail3;
 884
 885         wacom_setup_device_quirks(features);
 886
 887         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
 888
 889         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
 890                 /* Append the device type to the name */
 891                 strlcat(wacom_wac->name,
 892                         features->device_type == BTN_TOOL_PEN ?
 893                                 " Pen" : " Finger",
 894                         sizeof(wacom_wac->name));
 895
 896                 error = wacom_add_shared_data(wacom_wac, dev);
 897                 if (error)
 898                         goto fail3;
 899         }
 900
 901         input_dev->name = wacom_wac->name;
 902         input_dev->dev.parent = &intf->dev;
 903         input_dev->open = wacom_open;
 904         input_dev->close = wacom_close;
 905         usb_to_input_id(dev, &input_dev->id);
 906         input_set_drvdata(input_dev, wacom);
 907
 908         wacom_setup_input_capabilities(input_dev, wacom_wac);
 909
 910         usb_fill_int_urb(wacom->irq, dev,
 911                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 912                          wacom_wac->data, features->pktlen,
 913                          wacom_sys_irq, wacom, endpoint->bInterval);
 914         wacom->irq->transfer_dma = wacom->data_dma;
 915         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 916
 917         error = wacom_initialize_leds(wacom);
 918         if (error)
 919                 goto fail4;
 920
 921         error = input_register_device(input_dev);
 922         if (error)
 923                 goto fail5;
 924
 925         /* Note that if query fails it is not a hard failure */
 926         wacom_query_tablet_data(intf, features);
 927
 928         usb_set_intfdata(intf, wacom);
 929         return 0;
 930
 931  fail5: wacom_destroy_leds(wacom);
 932  fail4: wacom_remove_shared_data(wacom_wac);
 933  fail3: usb_free_urb(wacom->irq);
 934  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 935  fail1: input_free_device(input_dev);
 936         kfree(wacom);
 937         return error;
 938 }
 939
 940 static void wacom_disconnect(struct usb_interface *intf)
 941 {
 942         struct wacom *wacom = usb_get_intfdata(intf);
 943
 944         usb_set_intfdata(intf, NULL);
 945
 946         usb_kill_urb(wacom->irq);
 947         input_unregister_device(wacom->wacom_wac.input);
 948         wacom_destroy_leds(wacom);
 949         usb_free_urb(wacom->irq);
 950         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 951                         wacom->wacom_wac.data, wacom->data_dma);
 952         wacom_remove_shared_data(&wacom->wacom_wac);
 953         kfree(wacom);
 954 }
 955
 956 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 957 {
 958         struct wacom *wacom = usb_get_intfdata(intf);
 959
 960         mutex_lock(&wacom->lock);
 961         usb_kill_urb(wacom->irq);
 962         mutex_unlock(&wacom->lock);
 963
 964         return 0;
 965 }
 966
 967 static int wacom_resume(struct usb_interface *intf)
 968 {
 969         struct wacom *wacom = usb_get_intfdata(intf);
 970         struct wacom_features *features = &wacom->wacom_wac.features;
 971         int rv = 0;
 972
 973         mutex_lock(&wacom->lock);
 974
 975         /* switch to wacom mode first */
 976         wacom_query_tablet_data(intf, features);
 977         wacom_led_control(wacom);
 978
 979         if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
 980                 rv = -EIO;
 981
 982         mutex_unlock(&wacom->lock);
 983
 984         return rv;
 985 }
 986
 987 static int wacom_reset_resume(struct usb_interface *intf)
 988 {
 989         return wacom_resume(intf);
 990 }
 991
 992 static struct usb_driver wacom_driver = {
 993         .name =         "wacom",
 994         .id_table =     wacom_ids,
 995         .probe =        wacom_probe,
 996         .disconnect =   wacom_disconnect,
 997         .suspend =      wacom_suspend,
 998         .resume =       wacom_resume,
 999         .reset_resume = wacom_reset_resume,
1000         .supports_autosuspend = 1,
1001 };
1002
1003 module_usb_driver(wacom_driver);