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, 0, wacom_wac->features->distance_max, 0, 0);
 215 }
 216
 217 void input_dev_i3s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 218 {
 219         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
 220         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) |
 221                 BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
 222         input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
 223         input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
 224 }
 225
 226 void input_dev_i3(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 227 {
 228         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_4) |
 229                 BIT_MASK(BTN_5) | BIT_MASK(BTN_6) | BIT_MASK(BTN_7);
 230         input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
 231 }
 232
 233 void input_dev_i4s(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 234 {
 235         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_FINGER);
 236         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_0) | BIT_MASK(BTN_1) | BIT_MASK(BTN_2) | BIT_MASK(BTN_3);
 237         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_4) | BIT_MASK(BTN_5) | BIT_MASK(BTN_6);
 238         input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
 239 }
 240
 241 void input_dev_i4(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 242 {
 243         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_7) | BIT_MASK(BTN_8);
 244 }
 245
 246 void input_dev_bee(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 247 {
 248         input_dev->keybit[BIT_WORD(BTN_MISC)] |= BIT_MASK(BTN_8) | BIT_MASK(BTN_9);
 249 }
 250
 251 void input_dev_i(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 252 {
 253         input_dev->evbit[0] |= BIT_MASK(EV_MSC) | BIT_MASK(EV_REL);
 254         input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 255         input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 256         input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_LEFT) |
 257                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE) |
 258                 BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA);
 259         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER) |
 260                 BIT_MASK(BTN_TOOL_PEN) | BIT_MASK(BTN_STYLUS) |
 261                 BIT_MASK(BTN_TOOL_MOUSE) | BIT_MASK(BTN_TOOL_BRUSH) |
 262                 BIT_MASK(BTN_TOOL_PENCIL) | BIT_MASK(BTN_TOOL_AIRBRUSH) |
 263                 BIT_MASK(BTN_TOOL_LENS) | BIT_MASK(BTN_STYLUS2);
 264         input_set_abs_params(input_dev, ABS_DISTANCE, 0, wacom_wac->features->distance_max, 0, 0);
 265         input_set_abs_params(input_dev, ABS_WHEEL, 0, 1023, 0, 0);
 266         input_set_abs_params(input_dev, ABS_TILT_X, 0, 127, 0, 0);
 267         input_set_abs_params(input_dev, ABS_TILT_Y, 0, 127, 0, 0);
 268         input_set_abs_params(input_dev, ABS_RZ, -900, 899, 0, 0);
 269         input_set_abs_params(input_dev, ABS_THROTTLE, -1023, 1023, 0, 0);
 270 }
 271
 272 void input_dev_pl(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 273 {
 274         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_PEN) |
 275                 BIT_MASK(BTN_STYLUS) | BIT_MASK(BTN_STYLUS2);
 276 }
 277
 278 void input_dev_pt(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 279 {
 280         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_RUBBER);
 281 }
 282
 283 void input_dev_tpc(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 284 {
 285         if (wacom_wac->features->device_type == BTN_TOOL_DOUBLETAP ||
 286             wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
 287                 input_set_abs_params(input_dev, ABS_RX, 0, wacom_wac->features->x_phy, 0, 0);
 288                 input_set_abs_params(input_dev, ABS_RY, 0, wacom_wac->features->y_phy, 0, 0);
 289                 input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_DOUBLETAP);
 290         }
 291 }
 292
 293 void input_dev_tpc2fg(struct input_dev *input_dev, struct wacom_wac *wacom_wac)
 294 {
 295         if (wacom_wac->features->device_type == BTN_TOOL_TRIPLETAP) {
 296                 input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOOL_TRIPLETAP);
 297                 input_dev->evbit[0] |= BIT_MASK(EV_MSC);
 298                 input_dev->mscbit[0] |= BIT_MASK(MSC_SERIAL);
 299         }
 300 }
 301
 302 static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc,
 303                            struct wacom_features *features)
 304 {
 305         struct usb_device *dev = interface_to_usbdev(intf);
 306         char limit = 0;
 307         /* result has to be defined as int for some devices */
 308         int result = 0;
 309         int i = 0, usage = WCM_UNDEFINED, finger = 0, pen = 0;
 310         unsigned char *report;
 311
 312         report = kzalloc(hid_desc->wDescriptorLength, GFP_KERNEL);
 313         if (!report)
 314                 return -ENOMEM;
 315
 316         /* retrive report descriptors */
 317         do {
 318                 result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 319                         USB_REQ_GET_DESCRIPTOR,
 320                         USB_RECIP_INTERFACE | USB_DIR_IN,
 321                         HID_DEVICET_REPORT << 8,
 322                         intf->altsetting[0].desc.bInterfaceNumber, /* interface */
 323                         report,
 324                         hid_desc->wDescriptorLength,
 325                         5000); /* 5 secs */
 326         } while (result < 0 && limit++ < 5);
 327
 328         /* No need to parse the Descriptor. It isn't an error though */
 329         if (result < 0)
 330                 goto out;
 331
 332         for (i = 0; i < hid_desc->wDescriptorLength; i++) {
 333
 334                 switch (report[i]) {
 335                 case HID_USAGE_PAGE:
 336                         switch (report[i + 1]) {
 337                         case HID_USAGE_PAGE_DIGITIZER:
 338                                 usage = WCM_DIGITIZER;
 339                                 i++;
 340                                 break;
 341
 342                         case HID_USAGE_PAGE_DESKTOP:
 343                                 usage = WCM_DESKTOP;
 344                                 i++;
 345                                 break;
 346                         }
 347                         break;
 348
 349                 case HID_USAGE:
 350                         switch (report[i + 1]) {
 351                         case HID_USAGE_X:
 352                                 if (usage == WCM_DESKTOP) {
 353                                         if (finger) {
 354                                                 features->device_type = BTN_TOOL_DOUBLETAP;
 355                                                 if (features->type == TABLETPC2FG) {
 356                                                         /* need to reset back */
 357                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 358                                                         features->device_type = BTN_TOOL_TRIPLETAP;
 359                                                 }
 360                                                 features->x_max =
 361                                                         wacom_le16_to_cpu(&report[i + 3]);
 362                                                 features->x_phy =
 363                                                         wacom_le16_to_cpu(&report[i + 6]);
 364                                                 features->unit = report[i + 9];
 365                                                 features->unitExpo = report[i + 11];
 366                                                 i += 12;
 367                                         } else if (pen) {
 368                                                 /* penabled only accepts exact bytes of data */
 369                                                 if (features->type == TABLETPC2FG)
 370                                                         features->pktlen = WACOM_PKGLEN_PENABLED;
 371                                                 features->device_type = BTN_TOOL_PEN;
 372                                                 features->x_max =
 373                                                         wacom_le16_to_cpu(&report[i + 3]);
 374                                                 i += 4;
 375                                         }
 376                                 } else if (usage == WCM_DIGITIZER) {
 377                                         /* max pressure isn't reported
 378                                         features->pressure_max = (unsigned short)
 379                                                         (report[i+4] << 8  | report[i + 3]);
 380                                         */
 381                                         features->pressure_max = 255;
 382                                         i += 4;
 383                                 }
 384                                 break;
 385
 386                         case HID_USAGE_Y:
 387                                 if (usage == WCM_DESKTOP) {
 388                                         if (finger) {
 389                                                 features->device_type = BTN_TOOL_DOUBLETAP;
 390                                                 if (features->type == TABLETPC2FG) {
 391                                                         /* need to reset back */
 392                                                         features->pktlen = WACOM_PKGLEN_TPC2FG;
 393                                                         features->device_type = BTN_TOOL_TRIPLETAP;
 394                                                         features->y_max =
 395                                                                 wacom_le16_to_cpu(&report[i + 3]);
 396                                                         features->y_phy =
 397                                                                 wacom_le16_to_cpu(&report[i + 6]);
 398                                                         i += 7;
 399                                                 } else {
 400                                                         features->y_max =
 401                                                                 features->x_max;
 402                                                         features->y_phy =
 403                                                                 wacom_le16_to_cpu(&report[i + 3]);
 404                                                         i += 4;
 405                                                 }
 406                                         } else if (pen) {
 407                                                 /* penabled only accepts exact bytes of data */
 408                                                 if (features->type == TABLETPC2FG)
 409                                                         features->pktlen = WACOM_PKGLEN_PENABLED;
 410                                                 features->device_type = BTN_TOOL_PEN;
 411                                                 features->y_max =
 412                                                         wacom_le16_to_cpu(&report[i + 3]);
 413                                                 i += 4;
 414                                         }
 415                                 }
 416                                 break;
 417
 418                         case HID_USAGE_FINGER:
 419                                 finger = 1;
 420                                 i++;
 421                                 break;
 422
 423                         case HID_USAGE_STYLUS:
 424                                 pen = 1;
 425                                 i++;
 426                                 break;
 427
 428                         case HID_USAGE_UNDEFINED:
 429                                 if (usage == WCM_DESKTOP && finger) /* capacity */
 430                                         features->pressure_max =
 431                                                 wacom_le16_to_cpu(&report[i + 3]);
 432                                 i += 4;
 433                                 break;
 434                         }
 435                         break;
 436
 437                 case HID_COLLECTION:
 438                         /* reset UsagePage and Finger */
 439                         finger = usage = 0;
 440                         break;
 441                 }
 442         }
 443
 444  out:
 445         result = 0;
 446         kfree(report);
 447         return result;
 448 }
 449
 450 static int wacom_query_tablet_data(struct usb_interface *intf, struct wacom_features *features)
 451 {
 452         unsigned char *rep_data;
 453         int limit = 0, report_id = 2;
 454         int error = -ENOMEM;
 455
 456         rep_data = kmalloc(2, GFP_KERNEL);
 457         if (!rep_data)
 458                 return error;
 459
 460         /* ask to report tablet data if it is 2FGT or not a Tablet PC */
 461         if (features->device_type == BTN_TOOL_TRIPLETAP) {
 462                 do {
 463                         rep_data[0] = 3;
 464                         rep_data[1] = 4;
 465                         report_id = 3;
 466                         error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
 467                                 report_id, rep_data, 2);
 468                         if (error >= 0)
 469                                 error = usb_get_report(intf,
 470                                         WAC_HID_FEATURE_REPORT, report_id,
 471                                         rep_data, 3);
 472                 } while ((error < 0 || rep_data[1] != 4) && limit++ < 5);
 473         } else if (features->type != TABLETPC && features->type != TABLETPC2FG) {
 474                 do {
 475                         rep_data[0] = 2;
 476                         rep_data[1] = 2;
 477                         error = usb_set_report(intf, WAC_HID_FEATURE_REPORT,
 478                                 report_id, rep_data, 2);
 479                         if (error >= 0)
 480                                 error = usb_get_report(intf,
 481                                         WAC_HID_FEATURE_REPORT, report_id,
 482                                         rep_data, 2);
 483                 } while ((error < 0 || rep_data[1] != 2) && limit++ < 5);
 484         }
 485
 486         kfree(rep_data);
 487
 488         return error < 0 ? error : 0;
 489 }
 490
 491 static int wacom_retrieve_hid_descriptor(struct usb_interface *intf,
 492                 struct wacom_features *features)
 493 {
 494         int error = 0;
 495         struct usb_host_interface *interface = intf->cur_altsetting;
 496         struct hid_descriptor *hid_desc;
 497
 498         /* default device to penabled */
 499         features->device_type = BTN_TOOL_PEN;
 500
 501         /* only Tablet PCs need to retrieve the info */
 502         if ((features->type != TABLETPC) && (features->type != TABLETPC2FG))
 503                 goto out;
 504
 505         if (usb_get_extra_descriptor(interface, HID_DEVICET_HID, &hid_desc)) {
 506                 if (usb_get_extra_descriptor(&interface->endpoint[0],
 507                                 HID_DEVICET_REPORT, &hid_desc)) {
 508                         printk("wacom: can not retrieve extra class descriptor\n");
 509                         error = 1;
 510                         goto out;
 511                 }
 512         }
 513         error = wacom_parse_hid(intf, hid_desc, features);
 514         if (error)
 515                 goto out;
 516
 517         /* touch device found but size is not defined. use default */
 518         if (features->device_type == BTN_TOOL_DOUBLETAP && !features->x_max) {
 519                 features->x_max = 1023;
 520                 features->y_max = 1023;
 521         }
 522
 523  out:
 524         return error;
 525 }
 526
 527 static int wacom_probe(struct usb_interface *intf, const struct usb_device_id *id)
 528 {
 529         struct usb_device *dev = interface_to_usbdev(intf);
 530         struct usb_endpoint_descriptor *endpoint;
 531         struct wacom *wacom;
 532         struct wacom_wac *wacom_wac;
 533         struct wacom_features *features;
 534         struct input_dev *input_dev;
 535         int error = -ENOMEM;
 536
 537         wacom = kzalloc(sizeof(struct wacom), GFP_KERNEL);
 538         wacom_wac = kzalloc(sizeof(struct wacom_wac), GFP_KERNEL);
 539         input_dev = input_allocate_device();
 540         if (!wacom || !input_dev || !wacom_wac)
 541                 goto fail1;
 542
 543         wacom_wac->data = usb_buffer_alloc(dev, WACOM_PKGLEN_MAX, GFP_KERNEL, &wacom->data_dma);
 544         if (!wacom_wac->data)
 545                 goto fail1;
 546
 547         wacom->irq = usb_alloc_urb(0, GFP_KERNEL);
 548         if (!wacom->irq)
 549                 goto fail2;
 550
 551         wacom->usbdev = dev;
 552         wacom->dev = input_dev;
 553         wacom->intf = intf;
 554         mutex_init(&wacom->lock);
 555         usb_make_path(dev, wacom->phys, sizeof(wacom->phys));
 556         strlcat(wacom->phys, "/input0", sizeof(wacom->phys));
 557
 558         wacom_wac->features = features = get_wacom_feature(id);
 559         BUG_ON(features->pktlen > WACOM_PKGLEN_MAX);
 560
 561         input_dev->name = wacom_wac->features->name;
 562         wacom->wacom_wac = wacom_wac;
 563         usb_to_input_id(dev, &input_dev->id);
 564
 565         input_dev->dev.parent = &intf->dev;
 566
 567         input_set_drvdata(input_dev, wacom);
 568
 569         input_dev->open = wacom_open;
 570         input_dev->close = wacom_close;
 571
 572         endpoint = &intf->cur_altsetting->endpoint[0].desc;
 573
 574         /* Retrieve the physical and logical size for OEM devices */
 575         error = wacom_retrieve_hid_descriptor(intf, features);
 576         if (error)
 577                 goto fail2;
 578
 579         input_dev->evbit[0] |= BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
 580         input_dev->keybit[BIT_WORD(BTN_DIGI)] |= BIT_MASK(BTN_TOUCH);
 581
 582         input_set_abs_params(input_dev, ABS_X, 0, features->x_max, 4, 0);
 583         input_set_abs_params(input_dev, ABS_Y, 0, features->y_max, 4, 0);
 584         input_set_abs_params(input_dev, ABS_PRESSURE, 0, features->pressure_max, 0, 0);
 585         input_dev->absbit[BIT_WORD(ABS_MISC)] |= BIT_MASK(ABS_MISC);
 586
 587         wacom_init_input_dev(input_dev, wacom_wac);
 588
 589         usb_fill_int_urb(wacom->irq, dev,
 590                          usb_rcvintpipe(dev, endpoint->bEndpointAddress),
 591                          wacom_wac->data, features->pktlen,
 592                          wacom_sys_irq, wacom, endpoint->bInterval);
 593         wacom->irq->transfer_dma = wacom->data_dma;
 594         wacom->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 595
 596         error = input_register_device(wacom->dev);
 597         if (error)
 598                 goto fail3;
 599
 600         /* Note that if query fails it is not a hard failure */
 601         wacom_query_tablet_data(intf, features);
 602
 603         usb_set_intfdata(intf, wacom);
 604         return 0;
 605
 606  fail3: usb_free_urb(wacom->irq);
 607  fail2: usb_buffer_free(dev, WACOM_PKGLEN_MAX, wacom_wac->data, wacom->data_dma);
 608  fail1: input_free_device(input_dev);
 609         kfree(wacom);
 610         kfree(wacom_wac);
 611         return error;
 612 }
 613
 614 static void wacom_disconnect(struct usb_interface *intf)
 615 {
 616         struct wacom *wacom = usb_get_intfdata(intf);
 617
 618         usb_set_intfdata(intf, NULL);
 619
 620         usb_kill_urb(wacom->irq);
 621         input_unregister_device(wacom->dev);
 622         usb_free_urb(wacom->irq);
 623         usb_buffer_free(interface_to_usbdev(intf), WACOM_PKGLEN_MAX,
 624                         wacom->wacom_wac->data, wacom->data_dma);
 625         kfree(wacom->wacom_wac);
 626         kfree(wacom);
 627 }
 628
 629 static int wacom_suspend(struct usb_interface *intf, pm_message_t message)
 630 {
 631         struct wacom *wacom = usb_get_intfdata(intf);
 632
 633         mutex_lock(&wacom->lock);
 634         usb_kill_urb(wacom->irq);
 635         mutex_unlock(&wacom->lock);
 636
 637         return 0;
 638 }
 639
 640 static int wacom_resume(struct usb_interface *intf)
 641 {
 642         struct wacom *wacom = usb_get_intfdata(intf);
 643         struct wacom_features *features = wacom->wacom_wac->features;
 644         int rv;
 645
 646         mutex_lock(&wacom->lock);
 647         if (wacom->open) {
 648                 rv = usb_submit_urb(wacom->irq, GFP_NOIO);
 649                 /* switch to wacom mode if needed */
 650                 if (!wacom_retrieve_hid_descriptor(intf, features))
 651                         wacom_query_tablet_data(intf, features);
 652         } else
 653                 rv = 0;
 654         mutex_unlock(&wacom->lock);
 655
 656         return rv;
 657 }
 658
 659 static int wacom_reset_resume(struct usb_interface *intf)
 660 {
 661         return wacom_resume(intf);
 662 }
 663
 664 static struct usb_driver wacom_driver = {
 665         .name =         "wacom",
 666         .probe =        wacom_probe,
 667         .disconnect =   wacom_disconnect,
 668         .suspend =      wacom_suspend,
 669         .resume =       wacom_resume,
 670         .reset_resume = wacom_reset_resume,
 671         .supports_autosuspend = 1,
 672 };
 673
 674 static int __init wacom_init(void)
 675 {
 676         int result;
 677         wacom_driver.id_table = get_device_table();
 678         result = usb_register(&wacom_driver);
 679         if (result == 0)
 680                 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 681                        DRIVER_DESC "\n");
 682         return result;
 683 }
 684
 685 static void __exit wacom_exit(void)
 686 {
 687         usb_deregister(&wacom_driver);
 688 }
 689
 690 module_init(wacom_init);
 691 module_exit(wacom_exit);