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