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;
 497
 498         buf = kzalloc(9, GFP_KERNEL);
 499         if (!buf)
 500                 return -ENOMEM;
 501
 502         buf[0] = WAC_CMD_LED_CONTROL;
 503         buf[1] = wacom->led.select >= 0 ? wacom->led.select | 4 : 0;
 504         buf[2] = wacom->led.llv;
 505         buf[3] = wacom->led.hlv;
 506         buf[4] = wacom->led.img_lum;
 507
 508         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 509                                   buf, 9, WAC_CMD_RETRIES);
 510         kfree(buf);
 511
 512         return retval;
 513 }
 514
 515 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 516 {
 517         unsigned char *buf;
 518         int i, retval;
 519
 520         buf = kzalloc(259, GFP_KERNEL);
 521         if (!buf)
 522                 return -ENOMEM;
 523
 524         /* Send 'start' command */
 525         buf[0] = WAC_CMD_ICON_START;
 526         buf[1] = 1;
 527         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 528                                   buf, 2, WAC_CMD_RETRIES);
 529         if (retval < 0)
 530                 goto out;
 531
 532         buf[0] = WAC_CMD_ICON_XFER;
 533         buf[1] = button_id & 0x07;
 534         for (i = 0; i < 4; i++) {
 535                 buf[2] = i;
 536                 memcpy(buf + 3, img + i * 256, 256);
 537
 538                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 539                                           buf, 259, WAC_CMD_RETRIES);
 540                 if (retval < 0)
 541                         break;
 542         }
 543
 544         /* Send 'stop' */
 545         buf[0] = WAC_CMD_ICON_START;
 546         buf[1] = 0;
 547         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 548                          buf, 2, WAC_CMD_RETRIES);
 549
 550 out:
 551         kfree(buf);
 552         return retval;
 553 }
 554
 555 static ssize_t wacom_led_select_store(struct device *dev,
 556                                       struct device_attribute *attr,
 557                                       const char *buf, size_t count)
 558 {
 559         struct wacom *wacom = dev_get_drvdata(dev);
 560         unsigned int id;
 561         int err;
 562
 563         err = kstrtouint(buf, 10, &id);
 564         if (err)
 565                 return err;
 566
 567         mutex_lock(&wacom->lock);
 568
 569         wacom->led.select = id;
 570         err = wacom_led_control(wacom);
 571
 572         mutex_unlock(&wacom->lock);
 573
 574         return err < 0 ? err : count;
 575 }
 576
 577 static DEVICE_ATTR(status_led_select, S_IWUSR, NULL, wacom_led_select_store);
 578
 579 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 580                                      const char *buf, size_t count)
 581 {
 582         unsigned int value;
 583         int err;
 584
 585         err = kstrtouint(buf, 10, &value);
 586         if (err)
 587                 return err;
 588
 589         mutex_lock(&wacom->lock);
 590
 591         *dest = value & 0x7f;
 592         err = wacom_led_control(wacom);
 593
 594         mutex_unlock(&wacom->lock);
 595
 596         return err < 0 ? err : count;
 597 }
 598
 599 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 600 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 601         struct device_attribute *attr, const char *buf, size_t count)   \
 602 {                                                                       \
 603         struct wacom *wacom = dev_get_drvdata(dev);                     \
 604                                                                         \
 605         return wacom_luminance_store(wacom, &wacom->led.field,          \
 606                                      buf, count);                       \
 607 }                                                                       \
 608 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 609                    NULL, wacom_##name##_luminance_store)
 610
 611 DEVICE_LUMINANCE_ATTR(status0, llv);
 612 DEVICE_LUMINANCE_ATTR(status1, hlv);
 613 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 614
 615 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 616                                         const char *buf, size_t count)
 617 {
 618         struct wacom *wacom = dev_get_drvdata(dev);
 619         int err;
 620
 621         if (count != 1024)
 622                 return -EINVAL;
 623
 624         mutex_lock(&wacom->lock);
 625
 626         err = wacom_led_putimage(wacom, button_id, buf);
 627
 628         mutex_unlock(&wacom->lock);
 629
 630         return err < 0 ? err : count;
 631 }
 632
 633 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 634 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 635         struct device_attribute *attr, const char *buf, size_t count)   \
 636 {                                                                       \
 637         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 638 }                                                                       \
 639 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 640                    NULL, wacom_btnimg##BUTTON_ID##_store)
 641
 642 DEVICE_BTNIMG_ATTR(0);
 643 DEVICE_BTNIMG_ATTR(1);
 644 DEVICE_BTNIMG_ATTR(2);
 645 DEVICE_BTNIMG_ATTR(3);
 646 DEVICE_BTNIMG_ATTR(4);
 647 DEVICE_BTNIMG_ATTR(5);
 648 DEVICE_BTNIMG_ATTR(6);
 649 DEVICE_BTNIMG_ATTR(7);
 650
 651 static struct attribute *wacom_led_attrs[] = {
 652         &dev_attr_status0_luminance.attr,
 653         &dev_attr_status1_luminance.attr,
 654         &dev_attr_status_led_select.attr,
 655         &dev_attr_buttons_luminance.attr,
 656         &dev_attr_button0_rawimg.attr,
 657         &dev_attr_button1_rawimg.attr,
 658         &dev_attr_button2_rawimg.attr,
 659         &dev_attr_button3_rawimg.attr,
 660         &dev_attr_button4_rawimg.attr,
 661         &dev_attr_button5_rawimg.attr,
 662         &dev_attr_button6_rawimg.attr,
 663         &dev_attr_button7_rawimg.attr,
 664         NULL
 665 };
 666
 667 static struct attribute_group wacom_led_attr_group = {
 668         .name = "wacom_led",
 669         .attrs = wacom_led_attrs,
 670 };
 671
 672 static int wacom_initialize_leds(struct wacom *wacom)
 673 {
 674         int error;
 675
 676         if (wacom->wacom_wac.features.type >= INTUOS4 &&
 677             wacom->wacom_wac.features.type <= INTUOS4L) {
 678
 679                 /* Initialize default values */
 680                 wacom->led.select = 0;
 681                 wacom->led.llv = 10;
 682                 wacom->led.hlv = 20;
 683                 wacom->led.img_lum = 10;
 684                 wacom_led_control(wacom);
 685
 686                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 687                                            &wacom_led_attr_group);
 688                 if (error) {
 689                         dev_err(&wacom->intf->dev,
 690                                 "cannot create sysfs group err: %d\n", error);
 691                         return error;
 692                 }
 693         }
 694
 695         return 0;
 696 }
 697
 698 static void wacom_destroy_leds(struct wacom *wacom)
 699 {
 700         if (wacom->wacom_wac.features.type >= INTUOS4 &&
 701             wacom->wacom_wac.features.type <= INTUOS4L) {
 702                 sysfs_remove_group(&wacom->intf->dev.kobj,
 703                                    &wacom_led_attr_group);
 704         }
 705 }
 706
 707 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 708 {
 709         struct usb_device *dev = interface_to_usbdev(intf);
 710         struct usb_endpoint_descriptor *endpoint;
 711         struct wacom *wacom;
 712         struct wacom_wac *wacom_wac;
 713         struct wacom_features *features;
 714         struct input_dev *input_dev;
 715         int error;
 716
 717         if (!id->driver_info)
 718                 return -EINVAL;
 719
 720         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 721         input_dev = input_allocate_device();
 722         if (!wacom || !input_dev) {
 723                 error = -ENOMEM;
 724                 goto fail1;
 725         }
 726
 727         wacom_wac = &wacom->wacom_wac;
 728         wacom_wac->features = *((struct wacom_features *)id->driver_info);
 729         features = &wacom_wac->features;
 730         if (features->pktlen > WACOM_PKGLEN_MAX) {
 731                 error = -EINVAL;
 732                 goto fail1;
 733         }
 734
 735         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
 736                                              GFP_KERNEL, &wacom->data_dma);
 737         if (!wacom_wac->data) {
 738                 error = -ENOMEM;
 739                 goto fail1;
 740         }
 741
 742         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 743         if (!wacom->irq) {
 744                 error = -ENOMEM;
 745                 goto fail2;
 746         }
 747
 748         wacom->usbdev = dev;
 749         wacom->intf = intf;
 750         mutex_init(&wacom->lock);
 751         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 752         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 753
 754         wacom_wac->input = input_dev;
 755
 756         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 757
 758         /* Retrieve the physical and logical size for OEM devices */
 759         error = wacom_retrieve_hid_descriptor(intf, features);
 760         if (error)
 761                 goto fail3;
 762
 763         wacom_setup_device_quirks(features);
 764
 765         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
 766
 767         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
 768                 /* Append the device type to the name */
 769                 strlcat(wacom_wac->name,
 770                         features->device_type == BTN_TOOL_PEN ?
 771                                 " Pen" : " Finger",
 772                         sizeof(wacom_wac->name));
 773
 774                 error = wacom_add_shared_data(wacom_wac, dev);
 775                 if (error)
 776                         goto fail3;
 777         }
 778
 779         input_dev->name = wacom_wac->name;
 780         input_dev->dev.parent = &intf->dev;
 781         input_dev->open = wacom_open;
 782         input_dev->close = wacom_close;
 783         usb_to_input_id(dev, &input_dev->id);
 784         input_set_drvdata(input_dev, wacom);
 785
 786         wacom_setup_input_capabilities(input_dev, wacom_wac);
 787
 788         usb_fill_int_urb(wacom->irq, dev,
 789                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 790                          wacom_wac->data, features->pktlen,
 791                          wacom_sys_irq, wacom, endpoint->bInterval);
 792         wacom->irq->transfer_dma = wacom->data_dma;
 793         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 794
 795         error = wacom_initialize_leds(wacom);
 796         if (error)
 797                 goto fail4;
 798
 799         error = input_register_device(input_dev);
 800         if (error)
 801                 goto fail5;
 802
 803         /* Note that if query fails it is not a hard failure */
 804         wacom_query_tablet_data(intf, features);
 805
 806         usb_set_intfdata(intf, wacom);
 807         return 0;
 808
 809  fail5: wacom_destroy_leds(wacom);
 810  fail4: wacom_remove_shared_data(wacom_wac);
 811  fail3: usb_free_urb(wacom->irq);
 812  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 813  fail1: input_free_device(input_dev);
 814         kfree(wacom);
 815         return error;
 816 }
 817
 818 static void wacom_disconnect(struct usb_interface *intf)
 819 {
 820         struct wacom *wacom = usb_get_intfdata(intf);
 821
 822         usb_set_intfdata(intf, NULL);
 823
 824         usb_kill_urb(wacom->irq);
 825         input_unregister_device(wacom->wacom_wac.input);
 826         wacom_destroy_leds(wacom);
 827         usb_free_urb(wacom->irq);
 828         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 829                         wacom->wacom_wac.data, wacom->data_dma);
 830         wacom_remove_shared_data(&wacom->wacom_wac);
 831         kfree(wacom);
 832 }
 833
 834 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 835 {
 836         struct wacom *wacom = usb_get_intfdata(intf);
 837
 838         mutex_lock(&wacom->lock);
 839         usb_kill_urb(wacom->irq);
 840         mutex_unlock(&wacom->lock);
 841
 842         return 0;
 843 }
 844
 845 static int wacom_resume(struct usb_interface *intf)
 846 {
 847         struct wacom *wacom = usb_get_intfdata(intf);
 848         struct wacom_features *features = &wacom->wacom_wac.features;
 849         int rv = 0;
 850
 851         mutex_lock(&wacom->lock);
 852
 853         /* switch to wacom mode first */
 854         wacom_query_tablet_data(intf, features);
 855         wacom_led_control(wacom);
 856
 857         if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
 858                 rv = -EIO;
 859
 860         mutex_unlock(&wacom->lock);
 861
 862         return rv;
 863 }
 864
 865 static int wacom_reset_resume(struct usb_interface *intf)
 866 {
 867         return wacom_resume(intf);
 868 }
 869
 870 static struct usb_driver wacom_driver = {
 871         .name =         "wacom",
 872         .id_table =     wacom_ids,
 873         .probe =        wacom_probe,
 874         .disconnect =   wacom_disconnect,
 875         .suspend =      wacom_suspend,
 876         .resume =       wacom_resume,
 877         .reset_resume = wacom_reset_resume,
 878         .supports_autosuspend = 1,
 879 };
 880
 881 static int __init wacom_init(void)
 882 {
 883         int result;
 884
 885         result = usb_register(&wacom_driver);
 886         if (result == 0)
 887                 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 888                        DRIVER_DESC "\n");
 889         return result;
 890 }
 891
 892 static void __exit wacom_exit(void)
 893 {
 894         usb_deregister(&wacom_driver);
 895 }
 896
 897 module_init(wacom_init);
 898 module_exit(wacom_exit);