SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/input/tablet/wacom_sys.c

   1 /*
   2  * drivers/input/tablet/wacom_sys.c
   3  *
   4  *  USB Wacom tablet support - system specific code
   5  */
   6
   7 /*
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include "wacom.h"
  15 #include "wacom_wac.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 #define WAC_HID_FEATURE_REPORT  0x03
  52
  53 static int usb_get_report(struct usb_interface *intf, unsigned char type,
  54                                 unsigned char id, void *buf, int size)
  55 {
  56         return usb_control_msg(interface_to_usbdev(intf),
  57                 usb_rcvctrlpipe(interface_to_usbdev(intf), 0),
  58                 USB_REQ_GET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  59                 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
  60                 buf, size, 100);
  61 }
  62
  63 static int usb_set_report(struct usb_interface *intf, unsigned char type,
  64                                 unsigned char id, void *buf, int size)
  65 {
  66         return usb_control_msg(interface_to_usbdev(intf),
  67                 usb_sndctrlpipe(interface_to_usbdev(intf), 0),
  68                 USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
  69                 (type << 8) + id, intf->altsetting[0].desc.bInterfaceNumber,
  70                 buf, size, 1000);
  71 }
  72
  73 static struct input_dev * get_input_dev(struct wacom_combo *wcombo)
  74 {
  75         return wcombo->wacom->dev;
  76 }
  77
  78 static void wacom_sys_irq(struct urb *urb)
  79 {
  80         struct wacom *wacom = urb->context;
  81         struct wacom_combo wcombo;
  82         int retval;
  83
  84         switch (urb->status) {
  85         case 0:
  86                 /* success */
  87                 break;
  88         case -ECONNRESET:
  89         case -ENOENT:
  90         case -ESHUTDOWN:
  91                 /* this urb is terminated, clean up */
  92                 dbg("%s - urb shutting down with status: %d", __func__, urb->status);
  93                 return;
  94         default:
  95                 dbg("%s - nonzero urb status received: %d", __func__, urb->status);
  96                 goto exit;
  97         }
  98
  99         wcombo.wacom = wacom;
 100         wcombo.urb = urb;
 101
 102         if (wacom_wac_irq(wacom->wacom_wac, (void *)&wcombo))
 103                 input_sync(get_input_dev(&wcombo));
 104
 105  exit:
 106         usb_mark_last_busy(wacom->usbdev);
 107         retval = usb_submit_urb (urb, GFP_ATOMIC);
 108         if (retval)
 109                 err ("%s - usb_submit_urb failed with result %d",
 110                      __func__, retval);
 111 }
 112
 113 void wacom_report_key(void *wcombo, unsigned int key_type, int key_data)
 114 {
 115         input_report_key(get_input_dev((struct wacom_combo *)wcombo), key_type, key_data);
 116 }
 117
 118 void wacom_report_abs(void *wcombo, unsigned int abs_type, int abs_data)
 119 {
 120         input_report_abs(get_input_dev((struct wacom_combo *)wcombo), abs_type, abs_data);
 121 }
 122
 123 void wacom_report_rel(void *wcombo, unsigned int rel_type, int rel_data)
 124 {
 125         input_report_rel(get_input_dev((struct wacom_combo *)wcombo), rel_type, rel_data);
 126 }
 127
 128 void wacom_input_event(void *wcombo, unsigned int type, unsigned int code, int value)
 129 {
 130         input_event(get_input_dev((struct wacom_combo *)wcombo), type, code, value);
 131 }
 132
 133 __u16 wacom_be16_to_cpu(unsigned char *data)
 134 {
 135         __u16 value;
 136         value = be16_to_cpu(*(__be16 *) data);
 137         return value;
 138 }
 139
 140 __u16 wacom_le16_to_cpu(unsigned char *data)
 141 {
 142         __u16 value;
 143         value = le16_to_cpu(*(__le16 *) data);
 144         return value;
 145 }
 146
 147 void wacom_input_sync(void *wcombo)
 148 {
 149         input_sync(get_input_dev((struct wacom_combo *)wcombo));
 150 }
 151
 152 static int wacom_open(struct input_dev *dev)
 153 {
 154         struct wacom *wacom = input_get_drvdata(dev);
 155
 156         mutex_lock(&wacom->lock);
 157
 158         wacom->irq->dev = wacom->usbdev;
 159
 160         if (usb_autopm_get_interface(wacom->intf) < 0) {
 161                 mutex_unlock(&wacom->lock);
 162                 return -EIO;
 163         }
 164
 165         if (usb_submit_urb(wacom->irq, GFP_KERNEL)) {
 166                 usb_autopm_put_interface(wacom->intf);
 167                 mutex_unlock(&wacom->lock);
 168                 return -EIO;
 169         }
 170
 171         wacom->open = 1;
 172         wacom->intf->needs_remote_wakeup = 1;
 173
 174         mutex_unlock(&wacom->lock);
 175         return 0;
 176 }
 177
 178 static void wacom_close(struct input_dev *dev)
 179 {
 180         struct wacom *wacom = input_get_drvdata(dev);
 181
 182         mutex_lock(&wacom->lock);
 183         usb_kill_urb(wacom->irq);
 184         wacom->open = 0;
 185         wacom->intf->needs_remote_wakeup = 0;
 186         mutex_unlock(&wacom->lock);
 187 }
 188
 189 void input_dev_mo(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 190 {
 191         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_1) |
 192                 BIT_MASK(BTN_5);
 193         input_set_abs_params(input_dev, ABS_WHEEL, 0, 71, 0, 0);
 194 }
 195
 196 void input_dev_g4(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 197 {
 198         input_dev->evbit[0] |= BIT_MASK(EV_MSC);
 199         input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 200         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
 201         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
 202                 BIT_MASK(BTN_4);
 203 }
 204
 205 void input_dev_g(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 206 {
 207         input_dev->evbit[0] |= BIT_MASK(EV_REL);
 208         input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 209         input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 210                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 211         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
 212                 BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 213                 BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_STYLUS2);
 214         input_set_abs_params(input_dev, ABS_DISTANCE,
 215                              0, wacom_wac->features.distance_max, 0, 0);
 216 }
 217
 218 void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 219 {
 220         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
 221         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
 222                 BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
 223         input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
 224         input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
 225 }
 226
 227 void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 228 {
 229         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_4) |
 230                 BIT_MASK(BTN_5) | BIT_MASK(BTN_6) | BIT_MASK(BTN_7);
 231         input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
 232 }
 233
 234 void input_dev_i4s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 235 {
 236         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
 237         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) | BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
 238         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_4) | BIT_MASK(BTN_5) | BIT_MASK(BTN_6);
 239         input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
 240 }
 241
 242 void input_dev_i4(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 243 {
 244         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
 245 }
 246
 247 void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 248 {
 249         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_8) | BIT_MASK(BTN_9);
 250 }
 251
 252 void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 253 {
 254         input_dev->evbit[0] |= BIT_MASK(EV_MSC) | BIT_MASK(EV_REL);
 255         input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 256         input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 257         input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 258                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE) |
 259                 BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 260         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
 261                 BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 262                 BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_TOOL_BRUSH) |
 263                 BIT_MASK(BTN_TOOL_PENCIL) | BIT_MASK(BTN_TOOL_AIRBRUSH) |
 264                 BIT_MASK(BTN_TOOL_LENS) | BIT_MASK(BTN_STYLUS2);
 265         input_set_abs_params(input_dev, ABS_DISTANCE,
 266                              0, wacom_wac->features.distance_max, 0, 0);
 267         input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
 268         input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
 269         input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
 270         input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0);
 271         input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0);
 272 }
 273
 274 void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 275 {
 276         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
 277                 BIT_MASK(BTN_STYLUS) | BIT_MASK(BTN_STYLUS2);
 278 }
 279
 280 void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 281 {
 282         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER);
 283 }
 284
 285 void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 286 {
 287         struct wacom_features *features = &wacom_wac->features;
 288
 289         if (features->device_type == BTN_TOOL_DOUBLETAP ||
 290             features->device_type == BTN_TOOL_TRIPLETAP) {
 291                 input_set_abs_params(input_dev, ABS_RX, 0, features->x_phy, 0, 0);
 292                 input_set_abs_params(input_dev, ABS_RY, 0, features->y_phy, 0, 0);
 293                 __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
 294         }
 295 }
 296
 297 void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 298 {
 299         if (wacom_wac->features.device_type == BTN_TOOL_TRIPLETAP) {
 300                 input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_TRIPLETAP);
 301                 input_dev->evbit[0] |= BIT_MASK(EV_MSC);
 302                 input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 303         }
 304 }
 305
 306 static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
 307                            struct wacom_features *features)
 308 {
 309         struct usb_device *dev = interface_to_usbdev(intf);
 310         char limit = 0;
 311         /* result has to be defined as int for some devices */
 312         int result = 0;
 313         int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
 314         unsigned char *report;
 315
 316         report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
 317         if (!report)
 318                 return -ENOMEM;
 319
 320         /* retrive report descriptors */
 321         do {
 322                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 323                         USB_REQ_GET_DESCRIPTOR,
 324                         USB_RECIP_INTERFACE | USB_DIR_IN,
 325                         HID_DEVICET_REPORT << 8,
 326                         intf->altsetting[0].desc.bInterfaceNumber, /* interface */
 327                         report,
 328                         hid_desc->wDescriptorLength,
 329                         5000); /* 5 secs */
 330         } while (result < 0 && limit++ < 5);
 331
 332         /* No need to parse the Descriptor. It isn't an error though */
 333         if (result < 0)
 334                 goto out;
 335
 336         for (i = 0; i < hid_desc->wDescriptorLength; i++) {
 337
 338                 switch (report[i]) {
 339                 case HID_USAGE_PAGE:
 340                         switch (report[i + 1]) {
 341                         case HID_USAGE_PAGE_DIGITIZER:
 342                                 usage = WCM_DIGITIZER;
 343                                 i++;
 344                                 break;
 345
 346                         case HID_USAGE_PAGE_DESKTOP:
 347                                 usage = WCM_DESKTOP;
 348                                 i++;
 349                                 break;
 350                         }
 351                         break;
 352
 353                 case HID_USAGE:
 354                         switch (report[i + 1]) {
 355                         case HID_USAGE_X:
 356                                 if (usage == WCM_DESKTOP) {
 357                                         if (finger) {
 358                                                 features->device_type = BTN_TOOL_DOUBLETAP;
 359                                                 if (features->type == TABLETPC2FG) {
 360                                                         /* need to reset back */
 361                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 362                                                         features->device_type = BTN_TOOL_TRIPLETAP;
 363                                                 }
 364                                                 features->x_max =
 365                                                         wacom_le16_to_cpu(&report[i + 3]);
 366                                                 features->x_phy =
 367                                                         wacom_le16_to_cpu(&report[i + 6]);
 368                                                 features->unit = report[i + 9];
 369                                                 features->unitExpo = report[i + 11];
 370                                                 i += 12;
 371                                         } else if (pen) {
 372                                                 /* penabled only accepts exact bytes of data */
 373                                                 if (features->type == TABLETPC2FG)
 374                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 375                                                 features->device_type = BTN_TOOL_PEN;
 376                                                 features->x_max =
 377                                                         wacom_le16_to_cpu(&report[i + 3]);
 378                                                 i += 4;
 379                                         }
 380                                 } else if (usage == WCM_DIGITIZER) {
 381                                         /* max pressure isn't reported
 382                                         features->pressure_max = (unsigned short)
 383                                                         (report[i+4] << 8  | report[i + 3]);
 384                                         */
 385                                         features->pressure_max = 255;
 386                                         i += 4;
 387                                 }
 388                                 break;
 389
 390                         case HID_USAGE_Y:
 391                                 if (usage == WCM_DESKTOP) {
 392                                         if (finger) {
 393                                                 features->device_type = BTN_TOOL_DOUBLETAP;
 394                                                 if (features->type == TABLETPC2FG) {
 395                                                         /* need to reset back */
 396                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 397                                                         features->device_type = BTN_TOOL_TRIPLETAP;
 398                                                         features->y_max =
 399                                                                 wacom_le16_to_cpu(&report[i + 3]);
 400                                                         features->y_phy =
 401                                                                 wacom_le16_to_cpu(&report[i + 6]);
 402                                                         i += 7;
 403                                                 } else {
 404                                                         features->y_max =
 405                                                                 features->x_max;
 406                                                         features->y_phy =
 407                                                                 wacom_le16_to_cpu(&report[i + 3]);
 408                                                         i += 4;
 409                                                 }
 410                                         } else if (pen) {
 411                                                 /* penabled only accepts exact bytes of data */
 412                                                 if (features->type == TABLETPC2FG)
 413                                                         features->pktlen = WACOM_PKGLEN_GRAPHIRE;
 414                                                 features->device_type = BTN_TOOL_PEN;
 415                                                 features->y_max =
 416                                                         wacom_le16_to_cpu(&report[i + 3]);
 417                                                 i += 4;
 418                                         }
 419                                 }
 420                                 break;
 421
 422                         case HID_USAGE_FINGER:
 423                                 finger = 1;
 424                                 i++;
 425                                 break;
 426
 427                         case HID_USAGE_STYLUS:
 428                                 pen = 1;
 429                                 i++;
 430                                 break;
 431
 432                         case HID_USAGE_UNDEFINED:
 433                                 if (usage == WCM_DESKTOP && finger) /* capacity */
 434                                         features->pressure_max =
 435                                                 wacom_le16_to_cpu(&report[i + 3]);
 436                                 i += 4;
 437                                 break;
 438                         }
 439                         break;
 440
 441                 case HID_COLLECTION:
 442                         /* reset UsagePage and Finger */
 443                         finger = usage = 0;
 444                         break;
 445                 }
 446         }
 447
 448  out:
 449         result = 0;
 450         kfree(report);
 451         return result;
 452 }
 453
 454 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 455 {
 456         unsigned char *rep_data;
 457         int limit = 0, report_id = 2;
 458         int error = -ENOMEM;
 459
 460         rep_data = kmalloc(2, GFP_KERNEL);
 461         if (!rep_data)
 462                 return error;
 463
 464         /* ask to report tablet data if it is 2FGT or not a Tablet PC */
 465         if (features->device_type == BTN_TOOL_TRIPLETAP) {
 466                 do {
 467                         rep_data[0] = 3;
 468                         rep_data[1] = 4;
 469                         report_id = 3;
 470                         error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
 471                                 report_id, rep_data, 2);
 472                         if (error >= 0)
 473                                 error = usb_get_report(intf,
 474                                         WAC_HID_FEATURE_REPORT, report_id,
 475                                         rep_data, 3);
 476                 } while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
 477         } else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
 478                 do {
 479                         rep_data[0] = 2;
 480                         rep_data[1] = 2;
 481                         error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
 482                                 report_id, rep_data, 2);
 483                         if (error >= 0)
 484                                 error = usb_get_report(intf,
 485                                         WAC_HID_FEATURE_REPORT, report_id,
 486                                         rep_data, 2);
 487                 } while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
 488         }
 489
 490         kfree(rep_data);
 491
 492         return error < 0 ? error : 0;
 493 }
 494
 495 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 496                 struct wacom_features *features)
 497 {
 498         int error = 0;
 499         struct usb_host_interface *interface = intf->cur_altsetting;
 500         struct hid_descriptor *hid_desc;
 501
 502         /* default device to penabled */
 503         features->device_type = BTN_TOOL_PEN;
 504
 505         /* only Tablet PCs need to retrieve the info */
 506         if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
 507                 goto out;
 508
 509         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
 510                 if (usb_get_extra_descriptor(&interface->endpoint[0],
 511                                 HID_DEVICET_REPORT, &hid_desc)) {
 512                         printk("wacom: can not retrieve extra class descriptor\n");
 513                         error = 1;
 514                         goto out;
 515                 }
 516         }
 517         error = wacom_parse_hid(intf, hid_desc, features);
 518         if (error)
 519                 goto out;
 520
 521         /* touch device found but size is not defined. use default */
 522         if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
 523                 features->x_max = 1023;
 524                 features->y_max = 1023;
 525         }
 526
 527  out:
 528         return error;
 529 }
 530
 531 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 532 {
 533         struct usb_device *dev = interface_to_usbdev(intf);
 534         struct usb_endpoint_descriptor *endpoint;
 535         struct wacom *wacom;
 536         struct wacom_wac *wacom_wac;
 537         struct wacom_features *features;
 538         struct input_dev *input_dev;
 539         int error;
 540
 541         if (!id->driver_info)
 542                 return -EINVAL;
 543
 544         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 545         wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
 546         input_dev = input_allocate_device();
 547         if (!wacom || !input_dev || !wacom_wac) {
 548                 error = -ENOMEM;
 549                 goto fail1;
 550         }
 551
 552         wacom_wac->features = *((struct wacom_features *)id->driver_info);
 553         features = &wacom_wac->features;
 554         if (features->pktlen > WACOM_PKGLEN_MAX) {
 555                 error = -EINVAL;
 556                 goto fail1;
 557         }
 558
 559         wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX,
 560                                            GFP_KERNEL, &wacom->data_dma);
 561         if (!wacom_wac->data) {
 562                 error = -ENOMEM;
 563                 goto fail1;
 564         }
 565
 566         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 567         if (!wacom->irq) {
 568                 error = -ENOMEM;
 569                 goto fail2;
 570         }
 571
 572         wacom->usbdev = dev;
 573         wacom->dev = input_dev;
 574         wacom->intf = intf;
 575         mutex_init(&wacom->lock);
 576         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 577         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 578
 579         usb_to_input_id(dev, &input_dev->id);
 580
 581         input_dev->dev.parent = &intf->dev;
 582
 583         input_set_drvdata(input_dev, wacom);
 584
 585         input_dev->open = wacom_open;
 586         input_dev->close = wacom_close;
 587
 588         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 589
 590         /* Retrieve the physical and logical size for OEM devices */
 591         error = wacom_retrieve_hid_descriptor(intf, features);
 592         if (error)
 593                 goto fail2;
 594
 595         strlcpy(wacom_wac->name, features->name, sizeof(wacom_wac->name));
 596
 597         if (features->type == TABLETPC || features->type == TABLETPC2FG) {
 598                 /* Append the device type to the name */
 599                 strlcat(wacom_wac->name,
 600                         features->device_type == BTN_TOOL_PEN ?
 601                                 " Pen" : " Finger",
 602                         sizeof(wacom_wac->name));
 603         }
 604
 605         input_dev->name = wacom_wac->name;
 606         wacom->wacom_wac = wacom_wac;
 607
 608         input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 609         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOUCH);
 610
 611         input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
 612         input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
 613         input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
 614         input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
 615
 616         wacom_init_input_dev(input_dev, wacom_wac);
 617
 618         usb_fill_int_urb(wacom->irq, dev,
 619                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 620                          wacom_wac->data, features->pktlen,
 621                          wacom_sys_irq, wacom, endpoint->bInterval);
 622         wacom->irq->transfer_dma = wacom->data_dma;
 623         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 624
 625         error = input_register_device(wacom->dev);
 626         if (error)
 627                 goto fail3;
 628
 629         /* Note that if query fails it is not a hard failure */
 630         wacom_query_tablet_data(intf, features);
 631
 632         usb_set_intfdata(intf, wacom);
 633         return 0;
 634
 635  fail3: usb_free_urb(wacom->irq);
 636  fail2: usb_buffer_free(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 637  fail1: input_free_device(input_dev);
 638         kfree(wacom);
 639         kfree(wacom_wac);
 640         return error;
 641 }
 642
 643 static void wacom_disconnect(struct usb_interface *intf)
 644 {
 645         struct wacom *wacom = usb_get_intfdata(intf);
 646
 647         usb_set_intfdata(intf, NULL);
 648
 649         usb_kill_urb(wacom->irq);
 650         input_unregister_device(wacom->dev);
 651         usb_free_urb(wacom->irq);
 652         usb_buffer_free(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 653                         wacom->wacom_wac->data, wacom->data_dma);
 654         kfree(wacom->wacom_wac);
 655         kfree(wacom);
 656 }
 657
 658 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 659 {
 660         struct wacom *wacom = usb_get_intfdata(intf);
 661
 662         mutex_lock(&wacom->lock);
 663         usb_kill_urb(wacom->irq);
 664         mutex_unlock(&wacom->lock);
 665
 666         return 0;
 667 }
 668
 669 static int wacom_resume(struct usb_interface *intf)
 670 {
 671         struct wacom *wacom = usb_get_intfdata(intf);
 672         struct wacom_features *features = &wacom->wacom_wac->features;
 673         int rv;
 674
 675         mutex_lock(&wacom->lock);
 676
 677         /* switch to wacom mode first */
 678         wacom_query_tablet_data(intf, features);
 679
 680         if (wacom->open)
 681                 rv = usb_submit_urb(wacom->irq, GFP_NOIO);
 682         else
 683                 rv = 0;
 684
 685         mutex_unlock(&wacom->lock);
 686
 687         return rv;
 688 }
 689
 690 static int wacom_reset_resume(struct usb_interface *intf)
 691 {
 692         return wacom_resume(intf);
 693 }
 694
 695 static struct usb_driver wacom_driver = {
 696         .name =         "wacom",
 697         .id_table =     wacom_ids,
 698         .probe =        wacom_probe,
 699         .disconnect =   wacom_disconnect,
 700         .suspend =      wacom_suspend,
 701         .resume =       wacom_resume,
 702         .reset_resume = wacom_reset_resume,
 703         .supports_autosuspend = 1,
 704 };
 705
 706 static int __init wacom_init(void)
 707 {
 708         int result;
 709
 710         result = usb_register(&wacom_driver);
 711         if (result == 0)
 712                 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 713                        DRIVER_DESC "\n");
 714         return result;
 715 }
 716
 717 static void __exit wacom_exit(void)
 718 {
 719         usb_deregister(&wacom_driver);
 720 }
 721
 722 module_init(wacom_init);
 723 module_exit(wacom_exit);