drivers/hid/hid-multitouch.c

   1 /*
   2  *  HID driver for multitouch panels
   3  *
   4  *  Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
   5  *  Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   6  *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
   7  *
   8  *  This code is partly based on hid-egalax.c:
   9  *
  10  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  11  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  12  *  Copyright (c) 2010 Canonical, Ltd.
  13  *
  14  *  This code is partly based on hid-3m-pct.c:
  15  *
  16  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  17  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  18  *  Copyright (c) 2010      Canonical, Ltd.
  19  *
  20  */
  21
  22 /*
  23  * This program is free software; you can redistribute it and/or modify it
  24  * under the terms of the GNU General Public License as published by the Free
  25  * Software Foundation; either version 2 of the License, or (at your option)
  26  * any later version.
  27  */
  28
  29 #include <linux/device.h>
  30 #include <linux/hid.h>
  31 #include <linux/module.h>
  32 #include <linux/slab.h>
  33 #include <linux/usb.h>
  34 #include <linux/input/mt.h>
  35 #include "usbhid/usbhid.h"
  36
  37
  38 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  39 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  40 MODULE_DESCRIPTION("HID multitouch panels");
  41 MODULE_LICENSE("GPL");
  42
  43 #include "hid-ids.h"
  44
  45 /* quirks to control the device */
  46 #define MT_QUIRK_NOT_SEEN_MEANS_UP      (1 << 0)
  47 #define MT_QUIRK_SLOT_IS_CONTACTID      (1 << 1)
  48 #define MT_QUIRK_CYPRESS                (1 << 2)
  49 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  (1 << 3)
  50 #define MT_QUIRK_ALWAYS_VALID           (1 << 4)
  51 #define MT_QUIRK_VALID_IS_INRANGE       (1 << 5)
  52 #define MT_QUIRK_VALID_IS_CONFIDENCE    (1 << 6)
  53 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    (1 << 8)
  54
  55 struct mt_slot {
  56         __s32 x, y, p, w, h;
  57         __s32 contactid;        /* the device ContactID assigned to this slot */
  58         bool touch_state;       /* is the touch valid? */
  59         bool seen_in_this_frame;/* has this slot been updated */
  60 };
  61
  62 struct mt_class {
  63         __s32 name;     /* MT_CLS */
  64         __s32 quirks;
  65         __s32 sn_move;  /* Signal/noise ratio for move events */
  66         __s32 sn_width; /* Signal/noise ratio for width events */
  67         __s32 sn_height;        /* Signal/noise ratio for height events */
  68         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  69         __u8 maxcontacts;
  70         bool is_indirect;       /* true for touchpads */
  71 };
  72
  73 struct mt_device {
  74         struct mt_slot curdata; /* placeholder of incoming data */
  75         struct mt_class mtclass;        /* our mt device class */
  76         unsigned last_field_index;      /* last field index of the report */
  77         unsigned last_slot_field;       /* the last field of a slot */
  78         __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
  79         __s8 maxcontact_report_id;      /* Maximum Contact Number HID feature,
  80                                    -1 if non-existent */
  81         __u8 num_received;      /* how many contacts we received */
  82         __u8 num_expected;      /* expected last contact index */
  83         __u8 maxcontacts;
  84         __u8 touches_by_report; /* how many touches are present in one report:
  85                                 * 1 means we should use a serial protocol
  86                                 * > 1 means hybrid (multitouch) protocol */
  87         bool curvalid;          /* is the current contact valid? */
  88         struct mt_slot *slots;
  89 };
  90
  91 /* classes of device behavior */
  92 #define MT_CLS_DEFAULT                          0x0001
  93
  94 #define MT_CLS_SERIAL                           0x0002
  95 #define MT_CLS_CONFIDENCE                       0x0003
  96 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
  97 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
  98 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
  99 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 100 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
 101 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 102
 103 /* vendor specific classes */
 104 #define MT_CLS_3M                               0x0101
 105 #define MT_CLS_CYPRESS                          0x0102
 106 #define MT_CLS_EGALAX                           0x0103
 107 #define MT_CLS_EGALAX_SERIAL                    0x0104
 108 #define MT_CLS_TOPSEED                          0x0105
 109 #define MT_CLS_PANASONIC                        0x0106
 110
 111 #define MT_DEFAULT_MAXCONTACT   10
 112
 113 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 114 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 115
 116 /*
 117  * these device-dependent functions determine what slot corresponds
 118  * to a valid contact that was just read.
 119  */
 120
 121 static int cypress_compute_slot(struct mt_device *td)
 122 {
 123         if (td->curdata.contactid != 0 || td->num_received == 0)
 124                 return td->curdata.contactid;
 125         else
 126                 return -1;
 127 }
 128
 129 static int find_slot_from_contactid(struct mt_device *td)
 130 {
 131         int i;
 132         for (i = 0; i < td->maxcontacts; ++i) {
 133                 if (td->slots[i].contactid == td->curdata.contactid &&
 134                         td->slots[i].touch_state)
 135                         return i;
 136         }
 137         for (i = 0; i < td->maxcontacts; ++i) {
 138                 if (!td->slots[i].seen_in_this_frame &&
 139                         !td->slots[i].touch_state)
 140                         return i;
 141         }
 142         /* should not occurs. If this happens that means
 143          * that the device sent more touches that it says
 144          * in the report descriptor. It is ignored then. */
 145         return -1;
 146 }
 147
 148 static struct mt_class mt_classes[] = {
 149         { .name = MT_CLS_DEFAULT,
 150                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 151         { .name = MT_CLS_SERIAL,
 152                 .quirks = MT_QUIRK_ALWAYS_VALID},
 153         { .name = MT_CLS_CONFIDENCE,
 154                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 155         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 156                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 157                         MT_QUIRK_SLOT_IS_CONTACTID },
 158         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 159                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 160                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 161         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 162                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 163                         MT_QUIRK_SLOT_IS_CONTACTID,
 164                 .maxcontacts = 2 },
 165         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 166                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 167                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 168                 .maxcontacts = 2 },
 169         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 170                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 171                         MT_QUIRK_SLOT_IS_CONTACTID,
 172                 .maxcontacts = 2 },
 173         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 174                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 175                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 176
 177         /*
 178          * vendor specific classes
 179          */
 180         { .name = MT_CLS_3M,
 181                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 182                         MT_QUIRK_SLOT_IS_CONTACTID,
 183                 .sn_move = 2048,
 184                 .sn_width = 128,
 185                 .sn_height = 128 },
 186         { .name = MT_CLS_CYPRESS,
 187                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 188                         MT_QUIRK_CYPRESS,
 189                 .maxcontacts = 10 },
 190         { .name = MT_CLS_EGALAX,
 191                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 192                         MT_QUIRK_VALID_IS_INRANGE,
 193                 .sn_move = 4096,
 194                 .sn_pressure = 32,
 195         },
 196         { .name = MT_CLS_EGALAX_SERIAL,
 197                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 198                         MT_QUIRK_ALWAYS_VALID,
 199                 .sn_move = 4096,
 200                 .sn_pressure = 32,
 201         },
 202         { .name = MT_CLS_TOPSEED,
 203                 .quirks = MT_QUIRK_ALWAYS_VALID,
 204                 .is_indirect = true,
 205                 .maxcontacts = 2,
 206         },
 207         { .name = MT_CLS_PANASONIC,
 208                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 209                 .maxcontacts = 4 },
 210
 211         { }
 212 };
 213
 214 static ssize_t mt_show_quirks(struct device *dev,
 215                            struct device_attribute *attr,
 216                            char *buf)
 217 {
 218         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 219         struct mt_device *td = hid_get_drvdata(hdev);
 220
 221         return sprintf(buf, "%u\n", td->mtclass.quirks);
 222 }
 223
 224 static ssize_t mt_set_quirks(struct device *dev,
 225                           struct device_attribute *attr,
 226                           const char *buf, size_t count)
 227 {
 228         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 229         struct mt_device *td = hid_get_drvdata(hdev);
 230
 231         unsigned long val;
 232
 233         if (kstrtoul(buf, 0, &val))
 234                 return -EINVAL;
 235
 236         td->mtclass.quirks = val;
 237
 238         return count;
 239 }
 240
 241 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 242
 243 static struct attribute *sysfs_attrs[] = {
 244         &dev_attr_quirks.attr,
 245         NULL
 246 };
 247
 248 static struct attribute_group mt_attribute_group = {
 249         .attrs = sysfs_attrs
 250 };
 251
 252 static void mt_feature_mapping(struct hid_device *hdev,
 253                 struct hid_field *field, struct hid_usage *usage)
 254 {
 255         struct mt_device *td = hid_get_drvdata(hdev);
 256
 257         switch (usage->hid) {
 258         case HID_DG_INPUTMODE:
 259                 td->inputmode = field->report->id;
 260                 break;
 261         case HID_DG_CONTACTMAX:
 262                 td->maxcontact_report_id = field->report->id;
 263                 td->maxcontacts = field->value[0];
 264                 if (td->mtclass.maxcontacts)
 265                         /* check if the maxcontacts is given by the class */
 266                         td->maxcontacts = td->mtclass.maxcontacts;
 267
 268                 break;
 269         }
 270 }
 271
 272 static void set_abs(struct input_dev *input, unsigned int code,
 273                 struct hid_field *field, int snratio)
 274 {
 275         int fmin = field->logical_minimum;
 276         int fmax = field->logical_maximum;
 277         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 278         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 279 }
 280
 281 static void set_last_slot_field(struct hid_usage *usage, struct mt_device *td,
 282                 struct hid_input *hi)
 283 {
 284         if (!test_bit(usage->hid, hi->input->absbit))
 285                 td->last_slot_field = usage->hid;
 286 }
 287
 288 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 289                 struct hid_field *field, struct hid_usage *usage,
 290                 unsigned long **bit, int *max)
 291 {
 292         struct mt_device *td = hid_get_drvdata(hdev);
 293         struct mt_class *cls = &td->mtclass;
 294         int code;
 295
 296         /* Only map fields from TouchScreen or TouchPad collections.
 297         * We need to ignore fields that belong to other collections
 298         * such as Mouse that might have the same GenericDesktop usages. */
 299         if (field->application == HID_DG_TOUCHSCREEN)
 300                 set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
 301         else if (field->application != HID_DG_TOUCHPAD)
 302                 return 0;
 303
 304         /* In case of an indirect device (touchpad), we need to add
 305          * specific BTN_TOOL_* to be handled by the synaptics xorg
 306          * driver.
 307          * We also consider that touchscreens providing buttons are touchpads.
 308          */
 309         if (field->application == HID_DG_TOUCHPAD ||
 310             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON ||
 311             cls->is_indirect) {
 312                 set_bit(INPUT_PROP_POINTER, hi->input->propbit);
 313                 set_bit(BTN_TOOL_FINGER, hi->input->keybit);
 314                 set_bit(BTN_TOOL_DOUBLETAP, hi->input->keybit);
 315                 set_bit(BTN_TOOL_TRIPLETAP, hi->input->keybit);
 316                 set_bit(BTN_TOOL_QUADTAP, hi->input->keybit);
 317         }
 318
 319         /* eGalax devices provide a Digitizer.Stylus input which overrides
 320          * the correct Digitizers.Finger X/Y ranges.
 321          * Let's just ignore this input. */
 322         if (field->physical == HID_DG_STYLUS)
 323                 return -1;
 324
 325         switch (usage->hid & HID_USAGE_PAGE) {
 326
 327         case HID_UP_GENDESK:
 328                 switch (usage->hid) {
 329                 case HID_GD_X:
 330                         hid_map_usage(hi, usage, bit, max,
 331                                         EV_ABS, ABS_MT_POSITION_X);
 332                         set_abs(hi->input, ABS_MT_POSITION_X, field,
 333                                 cls->sn_move);
 334                         /* touchscreen emulation */
 335                         set_abs(hi->input, ABS_X, field, cls->sn_move);
 336                         set_last_slot_field(usage, td, hi);
 337                         td->last_field_index = field->index;
 338                         return 1;
 339                 case HID_GD_Y:
 340                         hid_map_usage(hi, usage, bit, max,
 341                                         EV_ABS, ABS_MT_POSITION_Y);
 342                         set_abs(hi->input, ABS_MT_POSITION_Y, field,
 343                                 cls->sn_move);
 344                         /* touchscreen emulation */
 345                         set_abs(hi->input, ABS_Y, field, cls->sn_move);
 346                         set_last_slot_field(usage, td, hi);
 347                         td->last_field_index = field->index;
 348                         return 1;
 349                 }
 350                 return 0;
 351
 352         case HID_UP_DIGITIZER:
 353                 switch (usage->hid) {
 354                 case HID_DG_INRANGE:
 355                         set_last_slot_field(usage, td, hi);
 356                         td->last_field_index = field->index;
 357                         return 1;
 358                 case HID_DG_CONFIDENCE:
 359                         set_last_slot_field(usage, td, hi);
 360                         td->last_field_index = field->index;
 361                         return 1;
 362                 case HID_DG_TIPSWITCH:
 363                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 364                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 365                         set_last_slot_field(usage, td, hi);
 366                         td->last_field_index = field->index;
 367                         return 1;
 368                 case HID_DG_CONTACTID:
 369                         if (!td->maxcontacts)
 370                                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 371                         input_mt_init_slots(hi->input, td->maxcontacts);
 372                         td->last_slot_field = usage->hid;
 373                         td->last_field_index = field->index;
 374                         td->touches_by_report++;
 375                         return 1;
 376                 case HID_DG_WIDTH:
 377                         hid_map_usage(hi, usage, bit, max,
 378                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 379                         set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 380                                 cls->sn_width);
 381                         set_last_slot_field(usage, td, hi);
 382                         td->last_field_index = field->index;
 383                         return 1;
 384                 case HID_DG_HEIGHT:
 385                         hid_map_usage(hi, usage, bit, max,
 386                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 387                         set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 388                                 cls->sn_height);
 389                         input_set_abs_params(hi->input,
 390                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 391                         set_last_slot_field(usage, td, hi);
 392                         td->last_field_index = field->index;
 393                         return 1;
 394                 case HID_DG_TIPPRESSURE:
 395                         hid_map_usage(hi, usage, bit, max,
 396                                         EV_ABS, ABS_MT_PRESSURE);
 397                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 398                                 cls->sn_pressure);
 399                         /* touchscreen emulation */
 400                         set_abs(hi->input, ABS_PRESSURE, field,
 401                                 cls->sn_pressure);
 402                         set_last_slot_field(usage, td, hi);
 403                         td->last_field_index = field->index;
 404                         return 1;
 405                 case HID_DG_CONTACTCOUNT:
 406                         td->last_field_index = field->index;
 407                         return 1;
 408                 case HID_DG_CONTACTMAX:
 409                         /* we don't set td->last_slot_field as contactcount and
 410                          * contact max are global to the report */
 411                         td->last_field_index = field->index;
 412                         return -1;
 413                 }
 414                 case HID_DG_TOUCH:
 415                         /* Legacy devices use TIPSWITCH and not TOUCH.
 416                          * Let's just ignore this field. */
 417                         return -1;
 418                 /* let hid-input decide for the others */
 419                 return 0;
 420
 421         case HID_UP_BUTTON:
 422                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 423                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 424                 input_set_capability(hi->input, EV_KEY, code);
 425                 return 1;
 426
 427         case 0xff000000:
 428                 /* we do not want to map these: no input-oriented meaning */
 429                 return -1;
 430         }
 431
 432         return 0;
 433 }
 434
 435 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 436                 struct hid_field *field, struct hid_usage *usage,
 437                 unsigned long **bit, int *max)
 438 {
 439         if (usage->type == EV_KEY || usage->type == EV_ABS)
 440                 set_bit(usage->type, hi->input->evbit);
 441
 442         return -1;
 443 }
 444
 445 static int mt_compute_slot(struct mt_device *td)
 446 {
 447         __s32 quirks = td->mtclass.quirks;
 448
 449         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 450                 return td->curdata.contactid;
 451
 452         if (quirks & MT_QUIRK_CYPRESS)
 453                 return cypress_compute_slot(td);
 454
 455         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 456                 return td->num_received;
 457
 458         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 459                 return td->curdata.contactid - 1;
 460
 461         return find_slot_from_contactid(td);
 462 }
 463
 464 /*
 465  * this function is called when a whole contact has been processed,
 466  * so that it can assign it to a slot and store the data there
 467  */
 468 static void mt_complete_slot(struct mt_device *td)
 469 {
 470         td->curdata.seen_in_this_frame = true;
 471         if (td->curvalid) {
 472                 int slotnum = mt_compute_slot(td);
 473
 474                 if (slotnum >= 0 && slotnum < td->maxcontacts)
 475                         td->slots[slotnum] = td->curdata;
 476         }
 477         td->num_received++;
 478 }
 479
 480
 481 /*
 482  * this function is called when a whole packet has been received and processed,
 483  * so that it can decide what to send to the input layer.
 484  */
 485 static void mt_emit_event(struct mt_device *td, struct input_dev *input)
 486 {
 487         int i;
 488
 489         for (i = 0; i < td->maxcontacts; ++i) {
 490                 struct mt_slot *s = &(td->slots[i]);
 491                 if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
 492                         !s->seen_in_this_frame) {
 493                         s->touch_state = false;
 494                 }
 495
 496                 input_mt_slot(input, i);
 497                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
 498                         s->touch_state);
 499                 if (s->touch_state) {
 500                         /* this finger is on the screen */
 501                         int wide = (s->w > s->h);
 502                         /* divided by two to match visual scale of touch */
 503                         int major = max(s->w, s->h) >> 1;
 504                         int minor = min(s->w, s->h) >> 1;
 505
 506                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 507                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 508                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 509                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 510                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 511                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 512                 }
 513                 s->seen_in_this_frame = false;
 514
 515         }
 516
 517         input_mt_report_pointer_emulation(input, true);
 518         input_sync(input);
 519         td->num_received = 0;
 520 }
 521
 522
 523
 524 static int mt_event(struct hid_device *hid, struct hid_field *field,
 525                                 struct hid_usage *usage, __s32 value)
 526 {
 527         struct mt_device *td = hid_get_drvdata(hid);
 528         __s32 quirks = td->mtclass.quirks;
 529
 530         if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
 531                 switch (usage->hid) {
 532                 case HID_DG_INRANGE:
 533                         if (quirks & MT_QUIRK_ALWAYS_VALID)
 534                                 td->curvalid = true;
 535                         else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 536                                 td->curvalid = value;
 537                         break;
 538                 case HID_DG_TIPSWITCH:
 539                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 540                                 td->curvalid = value;
 541                         td->curdata.touch_state = value;
 542                         break;
 543                 case HID_DG_CONFIDENCE:
 544                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 545                                 td->curvalid = value;
 546                         break;
 547                 case HID_DG_CONTACTID:
 548                         td->curdata.contactid = value;
 549                         break;
 550                 case HID_DG_TIPPRESSURE:
 551                         td->curdata.p = value;
 552                         break;
 553                 case HID_GD_X:
 554                         td->curdata.x = value;
 555                         break;
 556                 case HID_GD_Y:
 557                         td->curdata.y = value;
 558                         break;
 559                 case HID_DG_WIDTH:
 560                         td->curdata.w = value;
 561                         break;
 562                 case HID_DG_HEIGHT:
 563                         td->curdata.h = value;
 564                         break;
 565                 case HID_DG_CONTACTCOUNT:
 566                         /*
 567                          * Includes multi-packet support where subsequent
 568                          * packets are sent with zero contactcount.
 569                          */
 570                         if (value)
 571                                 td->num_expected = value;
 572                         break;
 573                 case HID_DG_TOUCH:
 574                         /* do nothing */
 575                         break;
 576
 577                 default:
 578                         /* fallback to the generic hidinput handling */
 579                         return 0;
 580                 }
 581
 582                 if (usage->hid == td->last_slot_field)
 583                         mt_complete_slot(td);
 584
 585                 if (field->index == td->last_field_index
 586                         && td->num_received >= td->num_expected)
 587                         mt_emit_event(td, field->hidinput->input);
 588
 589         }
 590
 591         /* we have handled the hidinput part, now remains hiddev */
 592         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 593                 hid->hiddev_hid_event(hid, field, usage, value);
 594
 595         return 1;
 596 }
 597
 598 static void mt_set_input_mode(struct hid_device *hdev)
 599 {
 600         struct mt_device *td = hid_get_drvdata(hdev);
 601         struct hid_report *r;
 602         struct hid_report_enum *re;
 603
 604         if (td->inputmode < 0)
 605                 return;
 606
 607         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 608         r = re->report_id_hash[td->inputmode];
 609         if (r) {
 610                 r->field[0]->value[0] = 0x02;
 611                 usbhid_submit_report(hdev, r, USB_DIR_OUT);
 612         }
 613 }
 614
 615 static void mt_set_maxcontacts(struct hid_device *hdev)
 616 {
 617         struct mt_device *td = hid_get_drvdata(hdev);
 618         struct hid_report *r;
 619         struct hid_report_enum *re;
 620         int fieldmax, max;
 621
 622         if (td->maxcontact_report_id < 0)
 623                 return;
 624
 625         if (!td->mtclass.maxcontacts)
 626                 return;
 627
 628         re = &hdev->report_enum[HID_FEATURE_REPORT];
 629         r = re->report_id_hash[td->maxcontact_report_id];
 630         if (r) {
 631                 max = td->mtclass.maxcontacts;
 632                 fieldmax = r->field[0]->logical_maximum;
 633                 max = min(fieldmax, max);
 634                 if (r->field[0]->value[0] != max) {
 635                         r->field[0]->value[0] = max;
 636                         usbhid_submit_report(hdev, r, USB_DIR_OUT);
 637                 }
 638         }
 639 }
 640
 641 static void mt_post_parse_default_settings(struct mt_device *td)
 642 {
 643         __s32 quirks = td->mtclass.quirks;
 644
 645         /* unknown serial device needs special quirks */
 646         if (td->touches_by_report == 1) {
 647                 quirks |= MT_QUIRK_ALWAYS_VALID;
 648                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 649                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 650                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 651         }
 652
 653         td->mtclass.quirks = quirks;
 654 }
 655
 656 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 657 {
 658         int ret, i;
 659         struct mt_device *td;
 660         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 661
 662         if (id) {
 663                 for (i = 0; mt_classes[i].name ; i++) {
 664                         if (id->driver_data == mt_classes[i].name) {
 665                                 mtclass = &(mt_classes[i]);
 666                                 break;
 667                         }
 668                 }
 669         }
 670
 671         /* This allows the driver to correctly support devices
 672          * that emit events over several HID messages.
 673          */
 674         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 675
 676         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 677         if (!td) {
 678                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 679                 return -ENOMEM;
 680         }
 681         td->mtclass = *mtclass;
 682         td->inputmode = -1;
 683         td->maxcontact_report_id = -1;
 684         hid_set_drvdata(hdev, td);
 685
 686         ret = hid_parse(hdev);
 687         if (ret != 0)
 688                 goto fail;
 689
 690         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 691         if (ret)
 692                 goto fail;
 693
 694         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
 695                 mt_post_parse_default_settings(td);
 696
 697         td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
 698                                 GFP_KERNEL);
 699         if (!td->slots) {
 700                 dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
 701                 hid_hw_stop(hdev);
 702                 ret = -ENOMEM;
 703                 goto fail;
 704         }
 705
 706         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 707
 708         mt_set_maxcontacts(hdev);
 709         mt_set_input_mode(hdev);
 710
 711         return 0;
 712
 713 fail:
 714         kfree(td);
 715         return ret;
 716 }
 717
 718 #ifdef CONFIG_PM
 719 static int mt_reset_resume(struct hid_device *hdev)
 720 {
 721         mt_set_maxcontacts(hdev);
 722         mt_set_input_mode(hdev);
 723         return 0;
 724 }
 725 #endif
 726
 727 static void mt_remove(struct hid_device *hdev)
 728 {
 729         struct mt_device *td = hid_get_drvdata(hdev);
 730         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
 731         hid_hw_stop(hdev);
 732         kfree(td->slots);
 733         kfree(td);
 734         hid_set_drvdata(hdev, NULL);
 735 }
 736
 737 static const struct hid_device_id mt_devices[] = {
 738
 739         /* 3M panels */
 740         { .driver_data = MT_CLS_3M,
 741                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 742                         USB_DEVICE_ID_3M1968) },
 743         { .driver_data = MT_CLS_3M,
 744                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 745                         USB_DEVICE_ID_3M2256) },
 746         { .driver_data = MT_CLS_3M,
 747                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 748                         USB_DEVICE_ID_3M3266) },
 749
 750         /* ActionStar panels */
 751         { .driver_data = MT_CLS_DEFAULT,
 752                 MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
 753                         USB_DEVICE_ID_ACTIONSTAR_1011) },
 754
 755         /* Atmel panels */
 756         { .driver_data = MT_CLS_SERIAL,
 757                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 758                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
 759         { .driver_data = MT_CLS_SERIAL,
 760                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 761                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
 762
 763         /* Cando panels */
 764         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 765                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 766                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
 767         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 768                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 769                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
 770         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 771                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 772                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
 773         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 774                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 775                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
 776
 777         /* Chunghwa Telecom touch panels */
 778         {  .driver_data = MT_CLS_DEFAULT,
 779                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 780                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 781
 782         /* CVTouch panels */
 783         { .driver_data = MT_CLS_DEFAULT,
 784                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 785                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
 786
 787         /* Cypress panel */
 788         { .driver_data = MT_CLS_CYPRESS,
 789                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
 790                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
 791
 792         /* eGalax devices (resistive) */
 793         { .driver_data = MT_CLS_EGALAX,
 794                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 795                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
 796         { .driver_data = MT_CLS_EGALAX,
 797                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 798                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
 799
 800         /* eGalax devices (capacitive) */
 801         { .driver_data = MT_CLS_EGALAX,
 802                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 803                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
 804         { .driver_data = MT_CLS_EGALAX_SERIAL,
 805                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 806                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
 807         { .driver_data = MT_CLS_EGALAX_SERIAL,
 808                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 809                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
 810         { .driver_data = MT_CLS_EGALAX_SERIAL,
 811                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 812                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
 813         { .driver_data = MT_CLS_EGALAX_SERIAL,
 814                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 815                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
 816         { .driver_data = MT_CLS_EGALAX,
 817                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 818                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
 819         { .driver_data = MT_CLS_EGALAX_SERIAL,
 820                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 821                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
 822         { .driver_data = MT_CLS_EGALAX,
 823                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 824                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
 825         { .driver_data = MT_CLS_EGALAX_SERIAL,
 826                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 827                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
 828         { .driver_data = MT_CLS_EGALAX,
 829                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 830                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
 831         { .driver_data = MT_CLS_EGALAX,
 832                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 833                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
 834         { .driver_data = MT_CLS_EGALAX_SERIAL,
 835                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 836                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
 837         { .driver_data = MT_CLS_EGALAX_SERIAL,
 838                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 839                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
 840
 841         /* Elo TouchSystems IntelliTouch Plus panel */
 842         { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
 843                 MT_USB_DEVICE(USB_VENDOR_ID_ELO,
 844                         USB_DEVICE_ID_ELO_TS2515) },
 845
 846         /* GeneralTouch panel */
 847         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 848                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
 849                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
 850
 851         /* Gametel game controller */
 852         { .driver_data = MT_CLS_DEFAULT,
 853                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
 854                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
 855
 856         /* GoodTouch panels */
 857         { .driver_data = MT_CLS_DEFAULT,
 858                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
 859                         USB_DEVICE_ID_GOODTOUCH_000f) },
 860
 861         /* Hanvon panels */
 862         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 863                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
 864                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
 865
 866         /* Ideacom panel */
 867         { .driver_data = MT_CLS_SERIAL,
 868                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 869                         USB_DEVICE_ID_IDEACOM_IDC6650) },
 870         { .driver_data = MT_CLS_SERIAL,
 871                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 872                         USB_DEVICE_ID_IDEACOM_IDC6651) },
 873
 874         /* Ilitek dual touch panel */
 875         {  .driver_data = MT_CLS_DEFAULT,
 876                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 877                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 878
 879         /* IRTOUCH panels */
 880         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 881                 MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
 882                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
 883
 884         /* LG Display panels */
 885         { .driver_data = MT_CLS_DEFAULT,
 886                 MT_USB_DEVICE(USB_VENDOR_ID_LG,
 887                         USB_DEVICE_ID_LG_MULTITOUCH) },
 888
 889         /* Lumio panels */
 890         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 891                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 892                         USB_DEVICE_ID_CRYSTALTOUCH) },
 893         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 894                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 895                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
 896
 897         /* MosArt panels */
 898         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 899                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 900                         USB_DEVICE_ID_ASUS_T91MT)},
 901         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 902                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 903                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
 904         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 905                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
 906                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
 907
 908         /* Panasonic panels */
 909         { .driver_data = MT_CLS_PANASONIC,
 910                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 911                         USB_DEVICE_ID_PANABOARD_UBT780) },
 912         { .driver_data = MT_CLS_PANASONIC,
 913                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 914                         USB_DEVICE_ID_PANABOARD_UBT880) },
 915
 916         /* PenMount panels */
 917         { .driver_data = MT_CLS_CONFIDENCE,
 918                 MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
 919                         USB_DEVICE_ID_PENMOUNT_PCI) },
 920
 921         /* PixArt optical touch screen */
 922         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 923                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 924                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
 925         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 926                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 927                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
 928         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 929                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 930                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
 931
 932         /* PixCir-based panels */
 933         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 934                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
 935                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
 936         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 937                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 938                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
 939
 940         /* Quanta-based panels */
 941         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 942                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 943                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
 944         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 945                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 946                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
 947         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 948                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 949                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
 950
 951         /* Stantum panels */
 952         { .driver_data = MT_CLS_CONFIDENCE,
 953                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
 954                         USB_DEVICE_ID_MTP)},
 955         { .driver_data = MT_CLS_CONFIDENCE,
 956                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
 957                         USB_DEVICE_ID_MTP_STM)},
 958         { .driver_data = MT_CLS_CONFIDENCE,
 959                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
 960                         USB_DEVICE_ID_MTP_SITRONIX)},
 961
 962         /* TopSeed panels */
 963         { .driver_data = MT_CLS_TOPSEED,
 964                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
 965                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
 966
 967         /* Touch International panels */
 968         { .driver_data = MT_CLS_DEFAULT,
 969                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
 970                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
 971
 972         /* Unitec panels */
 973         { .driver_data = MT_CLS_DEFAULT,
 974                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
 975                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
 976         { .driver_data = MT_CLS_DEFAULT,
 977                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
 978                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
 979         /* XAT */
 980         { .driver_data = MT_CLS_DEFAULT,
 981                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
 982                         USB_DEVICE_ID_XAT_CSR) },
 983
 984         /* Xiroku */
 985         { .driver_data = MT_CLS_DEFAULT,
 986                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 987                         USB_DEVICE_ID_XIROKU_SPX) },
 988         { .driver_data = MT_CLS_DEFAULT,
 989                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 990                         USB_DEVICE_ID_XIROKU_MPX) },
 991         { .driver_data = MT_CLS_DEFAULT,
 992                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 993                         USB_DEVICE_ID_XIROKU_CSR) },
 994         { .driver_data = MT_CLS_DEFAULT,
 995                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 996                         USB_DEVICE_ID_XIROKU_SPX1) },
 997         { .driver_data = MT_CLS_DEFAULT,
 998                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
 999                         USB_DEVICE_ID_XIROKU_MPX1) },
1000         { .driver_data = MT_CLS_DEFAULT,
1001                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1002                         USB_DEVICE_ID_XIROKU_CSR1) },
1003         { .driver_data = MT_CLS_DEFAULT,
1004                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1005                         USB_DEVICE_ID_XIROKU_SPX2) },
1006         { .driver_data = MT_CLS_DEFAULT,
1007                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1008                         USB_DEVICE_ID_XIROKU_MPX2) },
1009         { .driver_data = MT_CLS_DEFAULT,
1010                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1011                         USB_DEVICE_ID_XIROKU_CSR2) },
1012
1013         /* Generic MT device */
1014         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1015         { }
1016 };
1017 MODULE_DEVICE_TABLE(hid, mt_devices);
1018
1019 static const struct hid_usage_id mt_grabbed_usages[] = {
1020         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1021         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1022 };
1023
1024 static struct hid_driver mt_driver = {
1025         .name = "hid-multitouch",
1026         .id_table = mt_devices,
1027         .probe = mt_probe,
1028         .remove = mt_remove,
1029         .input_mapping = mt_input_mapping,
1030         .input_mapped = mt_input_mapped,
1031         .feature_mapping = mt_feature_mapping,
1032         .usage_table = mt_grabbed_usages,
1033         .event = mt_event,
1034 #ifdef CONFIG_PM
1035         .reset_resume = mt_reset_resume,
1036 #endif
1037 };
1038
1039 static int __init mt_init(void)
1040 {
1041         return hid_register_driver(&mt_driver);
1042 }
1043
1044 static void __exit mt_exit(void)
1045 {
1046         hid_unregister_driver(&mt_driver);
1047 }
1048
1049 module_init(mt_init);
1050 module_exit(mt_exit);