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                                 }
 255                                 break;
 256
 257                         case HID_USAGE_Y:
 258                                 if (usage == WCM_DESKTOP) {
 259                                         if (finger) {
 260                                                 features->device_type = BTN_TOOL_FINGER;
 261                                                 if (features->type == TABLETPC2FG) {
 262                                                         /* need to reset back */
 263                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 264                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 265                                                         features->y_max =
 266                                                                 get_unaligned_le16(&report[i + 3]);
 267                                                         features->y_phy =
 268                                                                 get_unaligned_le16(&report[i + 6]);
 269                                                         i += 7;
 270                                                 } else if (features->type == BAMBOO_PT) {
 271                                                         /* need to reset back */
 272                                                         features->pktlen = WACOM_PKGLEN_BBTOUCH;
 273                                                         features->device_type = BTN_TOOL_DOUBLETAP;
 274                                                         features->y_phy =
 275                                                                 get_unaligned_le16(&report[i + 3]);
 276                                                         features->y_max =
 277                                                                 get_unaligned_le16(&report[i + 6]);
 278                                                         i += 12;
 279                                                 } else {
 280                                                         features->y_max =
 281                                                                 features->x_max;
 282                                                         features->y_phy =
 283                                                                 get_unaligned_le16(&report[i + 3]);
 284                                                         i += 4;
 285                                                 }
 286                                         } else if (pen) {
 287                                                 /* penabled only accepts exact bytes of data */
 288                                                 if (features->type == TABLETPC2FG)
 289                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 290                                                 if (features->type == BAMBOO_PT)
 291                                                         features->pktlen = WACOM_PKGLEN_BBFUN;
 292                                                 features->device_type = BTN_TOOL_PEN;
 293                                                 features->y_max =
 294                                                         get_unaligned_le16(&report[i + 3]);
 295                                                 i += 4;
 296                                         }
 297                                 }
 298                                 break;
 299
 300                         case HID_USAGE_FINGER:
 301                                 finger = 1;
 302                                 i++;
 303                                 break;
 304
 305                         case HID_USAGE_STYLUS:
 306                                 pen = 1;
 307                                 i++;
 308                                 break;
 309                         }
 310                         break;
 311
 312                 case HID_COLLECTION:
 313                         /* reset UsagePage and Finger */
 314                         finger = usage = 0;
 315                         break;
 316                 }
 317         }
 318
 319  out:
 320         result = 0;
 321         kfree(report);
 322         return result;
 323 }
 324
 325 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 326 {
 327         unsigned char *rep_data;
 328         int limit = 0, report_id = 2;
 329         int error = -ENOMEM;
 330
 331         rep_data = kmalloc(4, GFP_KERNEL);
 332         if (!rep_data)
 333                 return error;
 334
 335         /* ask to report tablet data if it is MT Tablet PC or
 336          * not a Tablet PC */
 337         if (features->type == TABLETPC2FG) {
 338                 do {
 339                         rep_data[0] = 3;
 340                         rep_data[1] = 4;
 341                         rep_data[2] = 0;
 342                         rep_data[3] = 0;
 343                         report_id = 3;
 344                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 345                                                  report_id, rep_data, 4, 1);
 346                         if (error >= 0)
 347                                 error = wacom_get_report(intf,
 348                                                 WAC_HID_FEATURE_REPORT,
 349                                                 report_id, rep_data, 4, 1);
 350                 } while ((error < 0 || rep_data[1] != 4) && limit++ < WAC_MSG_RETRIES);
 351         } else if (features->type != TABLETPC) {
 352                 do {
 353                         rep_data[0] = 2;
 354                         rep_data[1] = 2;
 355                         error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
 356                                                  report_id, rep_data, 2, 1);
 357                         if (error >= 0)
 358                                 error = wacom_get_report(intf,
 359                                                 WAC_HID_FEATURE_REPORT,
 360                                                 report_id, rep_data, 2, 1);
 361                 } while ((error < 0 || rep_data[1] != 2) && limit++ < WAC_MSG_RETRIES);
 362         }
 363
 364         kfree(rep_data);
 365
 366         return error < 0 ? error : 0;
 367 }
 368
 369 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 370                 struct wacom_features *features)
 371 {
 372         int error = 0;
 373         struct usb_host_interface *interface = intf->cur_altsetting;
 374         struct hid_descriptor *hid_desc;
 375
 376         /* default features */
 377         features->device_type = BTN_TOOL_PEN;
 378         features->x_fuzz = 4;
 379         features->y_fuzz = 4;
 380         features->pressure_fuzz = 0;
 381         features->distance_fuzz = 0;
 382
 383         /* only Tablet PCs and Bamboo P&T need to retrieve the info */
 384         if ((features->type != TABLETPC) && (features->type != TABLETPC2FG) &&
 385             (features->type != BAMBOO_PT))
 386                 goto out;
 387
 388         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
 389                 if (usb_get_extra_descriptor(&interface->endpoint[0],
 390                                 HID_DEVICET_REPORT, &hid_desc)) {
 391                         printk("wacom: can not retrieve extra class descriptor\n");
 392                         error = 1;
 393                         goto out;
 394                 }
 395         }
 396         error = wacom_parse_hid(intf, hid_desc, features);
 397         if (error)
 398                 goto out;
 399
 400  out:
 401         return error;
 402 }
 403
 404 struct wacom_usbdev_data {
 405         struct list_head list;
 406         struct kref kref;
 407         struct usb_device *dev;
 408         struct wacom_shared shared;
 409 };
 410
 411 static LIST_HEAD(wacom_udev_list);
 412 static DEFINE_MUTEX(wacom_udev_list_lock);
 413
 414 static struct wacom_usbdev_data *wacom_get_usbdev_data(struct usb_device *dev)
 415 {
 416         struct wacom_usbdev_data *data;
 417
 418         list_for_each_entry(data, &wacom_udev_list, list) {
 419                 if (data->dev == dev) {
 420                         kref_get(&data->kref);
 421                         return data;
 422                 }
 423         }
 424
 425         return NULL;
 426 }
 427
 428 static int wacom_add_shared_data(struct wacom_wac *wacom,
 429                                  struct usb_device *dev)
 430 {
 431         struct wacom_usbdev_data *data;
 432         int retval = 0;
 433
 434         mutex_lock(&wacom_udev_list_lock);
 435
 436         data = wacom_get_usbdev_data(dev);
 437         if (!data) {
 438                 data = kzalloc(sizeof(struct wacom_usbdev_data), GFP_KERNEL);
 439                 if (!data) {
 440                         retval = -ENOMEM;
 441                         goto out;
 442                 }
 443
 444                 kref_init(&data->kref);
 445                 data->dev = dev;
 446                 list_add_tail(&data->list, &wacom_udev_list);
 447         }
 448
 449         wacom->shared = &data->shared;
 450
 451 out:
 452         mutex_unlock(&wacom_udev_list_lock);
 453         return retval;
 454 }
 455
 456 static void wacom_release_shared_data(struct kref *kref)
 457 {
 458         struct wacom_usbdev_data *data =
 459                 container_of(kref, struct wacom_usbdev_data, kref);
 460
 461         mutex_lock(&wacom_udev_list_lock);
 462         list_del(&data->list);
 463         mutex_unlock(&wacom_udev_list_lock);
 464
 465         kfree(data);
 466 }
 467
 468 static void wacom_remove_shared_data(struct wacom_wac *wacom)
 469 {
 470         struct wacom_usbdev_data *data;
 471
 472         if (wacom->shared) {
 473                 data = container_of(wacom->shared, struct wacom_usbdev_data, shared);
 474                 kref_put(&data->kref, wacom_release_shared_data);
 475                 wacom->shared = NULL;
 476         }
 477 }
 478
 479 static int wacom_led_control(struct wacom *wacom)
 480 {
 481         unsigned char *buf;
 482         int retval;
 483
 484         buf = kzalloc(9, GFP_KERNEL);
 485         if (!buf)
 486                 return -ENOMEM;
 487
 488         buf[0] = WAC_CMD_LED_CONTROL;
 489         buf[1] = wacom->led.select >= 0 ? wacom->led.select | 4 : 0;
 490         buf[2] = wacom->led.llv;
 491         buf[3] = wacom->led.hlv;
 492         buf[4] = wacom->led.img_lum;
 493
 494         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_LED_CONTROL,
 495                                   buf, 9, WAC_CMD_RETRIES);
 496         kfree(buf);
 497
 498         return retval;
 499 }
 500
 501 static int wacom_led_putimage(struct wacom *wacom, int button_id, const void *img)
 502 {
 503         unsigned char *buf;
 504         int i, retval;
 505
 506         buf = kzalloc(259, GFP_KERNEL);
 507         if (!buf)
 508                 return -ENOMEM;
 509
 510         /* Send 'start' command */
 511         buf[0] = WAC_CMD_ICON_START;
 512         buf[1] = 1;
 513         retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 514                                   buf, 2, WAC_CMD_RETRIES);
 515         if (retval < 0)
 516                 goto out;
 517
 518         buf[0] = WAC_CMD_ICON_XFER;
 519         buf[1] = button_id & 0x07;
 520         for (i = 0; i < 4; i++) {
 521                 buf[2] = i;
 522                 memcpy(buf + 3, img + i * 256, 256);
 523
 524                 retval = wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_XFER,
 525                                           buf, 259, WAC_CMD_RETRIES);
 526                 if (retval < 0)
 527                         break;
 528         }
 529
 530         /* Send 'stop' */
 531         buf[0] = WAC_CMD_ICON_START;
 532         buf[1] = 0;
 533         wacom_set_report(wacom->intf, 0x03, WAC_CMD_ICON_START,
 534                          buf, 2, WAC_CMD_RETRIES);
 535
 536 out:
 537         kfree(buf);
 538         return retval;
 539 }
 540
 541 static ssize_t wacom_led_select_store(struct device *dev,
 542                                       struct device_attribute *attr,
 543                                       const char *buf, size_t count)
 544 {
 545         struct wacom *wacom = dev_get_drvdata(dev);
 546         unsigned int id;
 547         int err;
 548
 549         err = kstrtouint(buf, 10, &id);
 550         if (err)
 551                 return err;
 552
 553         mutex_lock(&wacom->lock);
 554
 555         wacom->led.select = id;
 556         err = wacom_led_control(wacom);
 557
 558         mutex_unlock(&wacom->lock);
 559
 560         return err < 0 ? err : count;
 561 }
 562
 563 static DEVICE_ATTR(status_led_select, S_IWUSR, NULL, wacom_led_select_store);
 564
 565 static ssize_t wacom_luminance_store(struct wacom *wacom, u8 *dest,
 566                                      const char *buf, size_t count)
 567 {
 568         unsigned int value;
 569         int err;
 570
 571         err = kstrtouint(buf, 10, &value);
 572         if (err)
 573                 return err;
 574
 575         mutex_lock(&wacom->lock);
 576
 577         *dest = value & 0x7f;
 578         err = wacom_led_control(wacom);
 579
 580         mutex_unlock(&wacom->lock);
 581
 582         return err < 0 ? err : count;
 583 }
 584
 585 #define DEVICE_LUMINANCE_ATTR(name, field)                              \
 586 static ssize_t wacom_##name##_luminance_store(struct device *dev,       \
 587         struct device_attribute *attr, const char *buf, size_t count)   \
 588 {                                                                       \
 589         struct wacom *wacom = dev_get_drvdata(dev);                     \
 590                                                                         \
 591         return wacom_luminance_store(wacom, &wacom->led.field,          \
 592                                      buf, count);                       \
 593 }                                                                       \
 594 static DEVICE_ATTR(name##_luminance, S_IWUSR,                           \
 595                    NULL, wacom_##name##_luminance_store)
 596
 597 DEVICE_LUMINANCE_ATTR(status0, llv);
 598 DEVICE_LUMINANCE_ATTR(status1, hlv);
 599 DEVICE_LUMINANCE_ATTR(buttons, img_lum);
 600
 601 static ssize_t wacom_button_image_store(struct device *dev, int button_id,
 602                                         const char *buf, size_t count)
 603 {
 604         struct wacom *wacom = dev_get_drvdata(dev);
 605         int err;
 606
 607         if (count != 1024)
 608                 return -EINVAL;
 609
 610         mutex_lock(&wacom->lock);
 611
 612         err = wacom_led_putimage(wacom, button_id, buf);
 613
 614         mutex_unlock(&wacom->lock);
 615
 616         return err < 0 ? err : count;
 617 }
 618
 619 #define DEVICE_BTNIMG_ATTR(BUTTON_ID)                                   \
 620 static ssize_t wacom_btnimg##BUTTON_ID##_store(struct device *dev,      \
 621         struct device_attribute *attr, const char *buf, size_t count)   \
 622 {                                                                       \
 623         return wacom_button_image_store(dev, BUTTON_ID, buf, count);    \
 624 }                                                                       \
 625 static DEVICE_ATTR(button##BUTTON_ID##_rawimg, S_IWUSR,                 \
 626                    NULL, wacom_btnimg##BUTTON_ID##_store)
 627
 628 DEVICE_BTNIMG_ATTR(0);
 629 DEVICE_BTNIMG_ATTR(1);
 630 DEVICE_BTNIMG_ATTR(2);
 631 DEVICE_BTNIMG_ATTR(3);
 632 DEVICE_BTNIMG_ATTR(4);
 633 DEVICE_BTNIMG_ATTR(5);
 634 DEVICE_BTNIMG_ATTR(6);
 635 DEVICE_BTNIMG_ATTR(7);
 636
 637 static struct attribute *wacom_led_attrs[] = {
 638         &dev_attr_status0_luminance.attr,
 639         &dev_attr_status1_luminance.attr,
 640         &dev_attr_status_led_select.attr,
 641         &dev_attr_buttons_luminance.attr,
 642         &dev_attr_button0_rawimg.attr,
 643         &dev_attr_button1_rawimg.attr,
 644         &dev_attr_button2_rawimg.attr,
 645         &dev_attr_button3_rawimg.attr,
 646         &dev_attr_button4_rawimg.attr,
 647         &dev_attr_button5_rawimg.attr,
 648         &dev_attr_button6_rawimg.attr,
 649         &dev_attr_button7_rawimg.attr,
 650         NULL
 651 };
 652
 653 static struct attribute_group wacom_led_attr_group = {
 654         .name = "wacom_led",
 655         .attrs = wacom_led_attrs,
 656 };
 657
 658 static int wacom_initialize_leds(struct wacom *wacom)
 659 {
 660         int error;
 661
 662         if (wacom->wacom_wac.features.type >= INTUOS4 &&
 663             wacom->wacom_wac.features.type <= INTUOS4L) {
 664
 665                 /* Initialize default values */
 666                 wacom->led.select = 0;
 667                 wacom->led.llv = 30;
 668                 wacom->led.hlv = 20;
 669                 wacom->led.img_lum = 10;
 670                 wacom_led_control(wacom);
 671
 672                 error = sysfs_create_group(&wacom->intf->dev.kobj,
 673                                            &wacom_led_attr_group);
 674                 if (error) {
 675                         dev_err(&wacom->intf->dev,
 676                                 "cannot create sysfs group err: %d\n", error);
 677                         return error;
 678                 }
 679         }
 680
 681         return 0;
 682 }
 683
 684 static void wacom_destroy_leds(struct wacom *wacom)
 685 {
 686         if (wacom->wacom_wac.features.type >= INTUOS4 &&
 687             wacom->wacom_wac.features.type <= INTUOS4L) {
 688                 sysfs_remove_group(&wacom->intf->dev.kobj,
 689                                    &wacom_led_attr_group);
 690         }
 691 }
 692
 693 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 694 {
 695         struct usb_device *dev = interface_to_usbdev(intf);
 696         struct usb_endpoint_descriptor *endpoint;
 697         struct wacom *wacom;
 698         struct wacom_wac *wacom_wac;
 699         struct wacom_features *features;
 700         struct input_dev *input_dev;
 701         int error;
 702
 703         if (!id->driver_info)
 704                 return -EINVAL;
 705
 706         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 707         input_dev = input_allocate_device();
 708         if (!wacom || !input_dev) {
 709                 error = -ENOMEM;
 710                 goto fail1;
 711         }
 712
 713         wacom_wac = &wacom->wacom_wac;
 714         wacom_wac->features = *((struct wacom_features *)id->driver_info);
 715         features = &wacom_wac->features;
 716         if (features->pktlen > WACOM_PKGLEN_MAX) {
 717                 error = -EINVAL;
 718                 goto fail1;
 719         }
 720
 721         wacom_wac->data = usb_alloc_coherent(dev, WACOM_PKGLEN_MAX,
 722                                              GFP_KERNEL, &wacom->data_dma);
 723         if (!wacom_wac->data) {
 724                 error = -ENOMEM;
 725                 goto fail1;
 726         }
 727
 728         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 729         if (!wacom->irq) {
 730                 error = -ENOMEM;
 731                 goto fail2;
 732         }
 733
 734         wacom->usbdev = dev;
 735         wacom->intf = intf;
 736         mutex_init(&wacom->lock);
 737         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 738         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 739
 740         wacom_wac->input = input_dev;
 741
 742         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 743
 744         /* Retrieve the physical and logical size for OEM devices */
 745         error = wacom_retrieve_hid_descriptor(intf, features);
 746         if (error)
 747                 goto fail3;
 748
 749         wacom_setup_device_quirks(features);
 750
 751         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
 752
 753         if (features->quirks & WACOM_QUIRK_MULTI_INPUT) {
 754                 /* Append the device type to the name */
 755                 strlcat(wacom_wac->name,
 756                         features->device_type == BTN_TOOL_PEN ?
 757                                 " Pen" : " Finger",
 758                         sizeof(wacom_wac->name));
 759
 760                 error = wacom_add_shared_data(wacom_wac, dev);
 761                 if (error)
 762                         goto fail3;
 763         }
 764
 765         input_dev->name = wacom_wac->name;
 766         input_dev->dev.parent = &intf->dev;
 767         input_dev->open = wacom_open;
 768         input_dev->close = wacom_close;
 769         usb_to_input_id(dev, &input_dev->id);
 770         input_set_drvdata(input_dev, wacom);
 771
 772         wacom_setup_input_capabilities(input_dev, wacom_wac);
 773
 774         usb_fill_int_urb(wacom->irq, dev,
 775                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 776                          wacom_wac->data, features->pktlen,
 777                          wacom_sys_irq, wacom, endpoint->bInterval);
 778         wacom->irq->transfer_dma = wacom->data_dma;
 779         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 780
 781         error = wacom_initialize_leds(wacom);
 782         if (error)
 783                 goto fail4;
 784
 785         error = input_register_device(input_dev);
 786         if (error)
 787                 goto fail5;
 788
 789         /* Note that if query fails it is not a hard failure */
 790         wacom_query_tablet_data(intf, features);
 791
 792         usb_set_intfdata(intf, wacom);
 793         return 0;
 794
 795  fail5: wacom_destroy_leds(wacom);
 796  fail4: wacom_remove_shared_data(wacom_wac);
 797  fail3: usb_free_urb(wacom->irq);
 798  fail2: usb_free_coherent(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 799  fail1: input_free_device(input_dev);
 800         kfree(wacom);
 801         return error;
 802 }
 803
 804 static void wacom_disconnect(struct usb_interface *intf)
 805 {
 806         struct wacom *wacom = usb_get_intfdata(intf);
 807
 808         usb_set_intfdata(intf, NULL);
 809
 810         usb_kill_urb(wacom->irq);
 811         input_unregister_device(wacom->wacom_wac.input);
 812         wacom_destroy_leds(wacom);
 813         usb_free_urb(wacom->irq);
 814         usb_free_coherent(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 815                         wacom->wacom_wac.data, wacom->data_dma);
 816         wacom_remove_shared_data(&wacom->wacom_wac);
 817         kfree(wacom);
 818 }
 819
 820 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 821 {
 822         struct wacom *wacom = usb_get_intfdata(intf);
 823
 824         mutex_lock(&wacom->lock);
 825         usb_kill_urb(wacom->irq);
 826         mutex_unlock(&wacom->lock);
 827
 828         return 0;
 829 }
 830
 831 static int wacom_resume(struct usb_interface *intf)
 832 {
 833         struct wacom *wacom = usb_get_intfdata(intf);
 834         struct wacom_features *features = &wacom->wacom_wac.features;
 835         int rv = 0;
 836
 837         mutex_lock(&wacom->lock);
 838
 839         /* switch to wacom mode first */
 840         wacom_query_tablet_data(intf, features);
 841         wacom_led_control(wacom);
 842
 843         if (wacom->open && usb_submit_urb(wacom->irq, GFP_NOIO) < 0)
 844                 rv = -EIO;
 845
 846         mutex_unlock(&wacom->lock);
 847
 848         return rv;
 849 }
 850
 851 static int wacom_reset_resume(struct usb_interface *intf)
 852 {
 853         return wacom_resume(intf);
 854 }
 855
 856 static struct usb_driver wacom_driver = {
 857         .name =         "wacom",
 858         .id_table =     wacom_ids,
 859         .probe =        wacom_probe,
 860         .disconnect =   wacom_disconnect,
 861         .suspend =      wacom_suspend,
 862         .resume =       wacom_resume,
 863         .reset_resume = wacom_reset_resume,
 864         .supports_autosuspend = 1,
 865 };
 866
 867 static int __init wacom_init(void)
 868 {
 869         int result;
 870
 871         result = usb_register(&wacom_driver);
 872         if (result == 0)
 873                 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 874                        DRIVER_DESC "\n");
 875         return result;
 876 }
 877
 878 static void __exit wacom_exit(void)
 879 {
 880         usb_deregister(&wacom_driver);
 881 }
 882
 883 module_init(wacom_init);
 884 module_exit(wacom_exit);