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 };
  60
  61 struct mt_class {
  62         __s32 name;     /* MT_CLS */
  63         __s32 quirks;
  64         __s32 sn_move;  /* Signal/noise ratio for move events */
  65         __s32 sn_width; /* Signal/noise ratio for width events */
  66         __s32 sn_height;        /* Signal/noise ratio for height events */
  67         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  68         __u8 maxcontacts;
  69         bool is_indirect;       /* true for touchpads */
  70 };
  71
  72 struct mt_fields {
  73         unsigned usages[HID_MAX_FIELDS];
  74         unsigned int length;
  75 };
  76
  77 struct mt_device {
  78         struct mt_slot curdata; /* placeholder of incoming data */
  79         struct mt_class mtclass;        /* our mt device class */
  80         struct mt_fields *fields;       /* temporary placeholder for storing the
  81                                            multitouch fields */
  82         unsigned last_field_index;      /* last field index of the report */
  83         unsigned last_slot_field;       /* the last field of a slot */
  84         __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
  85         __s8 inputmode_index;   /* InputMode HID feature index in the report */
  86         __s8 maxcontact_report_id;      /* Maximum Contact Number HID feature,
  87                                    -1 if non-existent */
  88         __u8 num_received;      /* how many contacts we received */
  89         __u8 num_expected;      /* expected last contact index */
  90         __u8 maxcontacts;
  91         __u8 touches_by_report; /* how many touches are present in one report:
  92                                 * 1 means we should use a serial protocol
  93                                 * > 1 means hybrid (multitouch) protocol */
  94         bool serial_maybe;      /* need to check for serial protocol */
  95         bool curvalid;          /* is the current contact valid? */
  96         unsigned mt_flags;      /* flags to pass to input-mt */
  97 };
  98
  99 /* classes of device behavior */
 100 #define MT_CLS_DEFAULT                          0x0001
 101
 102 #define MT_CLS_SERIAL                           0x0002
 103 #define MT_CLS_CONFIDENCE                       0x0003
 104 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 105 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 106 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 107 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 108 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
 109 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 110
 111 /* vendor specific classes */
 112 #define MT_CLS_3M                               0x0101
 113 #define MT_CLS_CYPRESS                          0x0102
 114 #define MT_CLS_EGALAX                           0x0103
 115 #define MT_CLS_EGALAX_SERIAL                    0x0104
 116 #define MT_CLS_TOPSEED                          0x0105
 117 #define MT_CLS_PANASONIC                        0x0106
 118
 119 #define MT_DEFAULT_MAXCONTACT   10
 120
 121 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 122 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 123
 124 /*
 125  * these device-dependent functions determine what slot corresponds
 126  * to a valid contact that was just read.
 127  */
 128
 129 static int cypress_compute_slot(struct mt_device *td)
 130 {
 131         if (td->curdata.contactid != 0 || td->num_received == 0)
 132                 return td->curdata.contactid;
 133         else
 134                 return -1;
 135 }
 136
 137 static struct mt_class mt_classes[] = {
 138         { .name = MT_CLS_DEFAULT,
 139                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 140         { .name = MT_CLS_SERIAL,
 141                 .quirks = MT_QUIRK_ALWAYS_VALID},
 142         { .name = MT_CLS_CONFIDENCE,
 143                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 144         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 145                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 146                         MT_QUIRK_SLOT_IS_CONTACTID },
 147         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 148                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 149                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 150         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 151                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 152                         MT_QUIRK_SLOT_IS_CONTACTID,
 153                 .maxcontacts = 2 },
 154         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 155                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 156                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 157                 .maxcontacts = 2 },
 158         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 159                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 160                         MT_QUIRK_SLOT_IS_CONTACTID,
 161                 .maxcontacts = 2 },
 162         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 163                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 164                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 165
 166         /*
 167          * vendor specific classes
 168          */
 169         { .name = MT_CLS_3M,
 170                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 171                         MT_QUIRK_SLOT_IS_CONTACTID,
 172                 .sn_move = 2048,
 173                 .sn_width = 128,
 174                 .sn_height = 128,
 175                 .maxcontacts = 60,
 176         },
 177         { .name = MT_CLS_CYPRESS,
 178                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 179                         MT_QUIRK_CYPRESS,
 180                 .maxcontacts = 10 },
 181         { .name = MT_CLS_EGALAX,
 182                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 183                         MT_QUIRK_VALID_IS_INRANGE,
 184                 .sn_move = 4096,
 185                 .sn_pressure = 32,
 186         },
 187         { .name = MT_CLS_EGALAX_SERIAL,
 188                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 189                         MT_QUIRK_ALWAYS_VALID,
 190                 .sn_move = 4096,
 191                 .sn_pressure = 32,
 192         },
 193         { .name = MT_CLS_TOPSEED,
 194                 .quirks = MT_QUIRK_ALWAYS_VALID,
 195                 .is_indirect = true,
 196                 .maxcontacts = 2,
 197         },
 198         { .name = MT_CLS_PANASONIC,
 199                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 200                 .maxcontacts = 4 },
 201
 202         { }
 203 };
 204
 205 static ssize_t mt_show_quirks(struct device *dev,
 206                            struct device_attribute *attr,
 207                            char *buf)
 208 {
 209         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 210         struct mt_device *td = hid_get_drvdata(hdev);
 211
 212         return sprintf(buf, "%u\n", td->mtclass.quirks);
 213 }
 214
 215 static ssize_t mt_set_quirks(struct device *dev,
 216                           struct device_attribute *attr,
 217                           const char *buf, size_t count)
 218 {
 219         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 220         struct mt_device *td = hid_get_drvdata(hdev);
 221
 222         unsigned long val;
 223
 224         if (kstrtoul(buf, 0, &val))
 225                 return -EINVAL;
 226
 227         td->mtclass.quirks = val;
 228
 229         return count;
 230 }
 231
 232 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 233
 234 static struct attribute *sysfs_attrs[] = {
 235         &dev_attr_quirks.attr,
 236         NULL
 237 };
 238
 239 static struct attribute_group mt_attribute_group = {
 240         .attrs = sysfs_attrs
 241 };
 242
 243 static void mt_feature_mapping(struct hid_device *hdev,
 244                 struct hid_field *field, struct hid_usage *usage)
 245 {
 246         struct mt_device *td = hid_get_drvdata(hdev);
 247         int i;
 248
 249         switch (usage->hid) {
 250         case HID_DG_INPUTMODE:
 251                 td->inputmode = field->report->id;
 252                 td->inputmode_index = 0; /* has to be updated below */
 253
 254                 for (i=0; i < field->maxusage; i++) {
 255                         if (field->usage[i].hid == usage->hid) {
 256                                 td->inputmode_index = i;
 257                                 break;
 258                         }
 259                 }
 260
 261                 break;
 262         case HID_DG_CONTACTMAX:
 263                 td->maxcontact_report_id = field->report->id;
 264                 td->maxcontacts = field->value[0];
 265                 if (td->mtclass.maxcontacts)
 266                         /* check if the maxcontacts is given by the class */
 267                         td->maxcontacts = td->mtclass.maxcontacts;
 268
 269                 break;
 270         }
 271 }
 272
 273 static void set_abs(struct input_dev *input, unsigned int code,
 274                 struct hid_field *field, int snratio)
 275 {
 276         int fmin = field->logical_minimum;
 277         int fmax = field->logical_maximum;
 278         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 279         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 280 }
 281
 282 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 283                 struct hid_input *hi)
 284 {
 285         struct mt_fields *f = td->fields;
 286
 287         if (f->length >= HID_MAX_FIELDS)
 288                 return;
 289
 290         f->usages[f->length++] = usage->hid;
 291 }
 292
 293 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 294                 struct hid_field *field, struct hid_usage *usage,
 295                 unsigned long **bit, int *max)
 296 {
 297         struct mt_device *td = hid_get_drvdata(hdev);
 298         struct mt_class *cls = &td->mtclass;
 299         int code;
 300
 301         /* Only map fields from TouchScreen or TouchPad collections.
 302         * We need to ignore fields that belong to other collections
 303         * such as Mouse that might have the same GenericDesktop usages. */
 304         if (field->application == HID_DG_TOUCHSCREEN)
 305                 td->mt_flags |= INPUT_MT_DIRECT;
 306         else if (field->application != HID_DG_TOUCHPAD)
 307                 return 0;
 308
 309         /*
 310          * Model touchscreens providing buttons as touchpads.
 311          */
 312         if (field->application == HID_DG_TOUCHPAD ||
 313             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 314                 td->mt_flags |= INPUT_MT_POINTER;
 315
 316         /* eGalax devices provide a Digitizer.Stylus input which overrides
 317          * the correct Digitizers.Finger X/Y ranges.
 318          * Let's just ignore this input. */
 319         if (field->physical == HID_DG_STYLUS)
 320                 return -1;
 321
 322         switch (usage->hid & HID_USAGE_PAGE) {
 323
 324         case HID_UP_GENDESK:
 325                 switch (usage->hid) {
 326                 case HID_GD_X:
 327                         hid_map_usage(hi, usage, bit, max,
 328                                         EV_ABS, ABS_MT_POSITION_X);
 329                         set_abs(hi->input, ABS_MT_POSITION_X, field,
 330                                 cls->sn_move);
 331                         mt_store_field(usage, td, hi);
 332                         td->last_field_index = field->index;
 333                         return 1;
 334                 case HID_GD_Y:
 335                         hid_map_usage(hi, usage, bit, max,
 336                                         EV_ABS, ABS_MT_POSITION_Y);
 337                         set_abs(hi->input, ABS_MT_POSITION_Y, field,
 338                                 cls->sn_move);
 339                         mt_store_field(usage, td, hi);
 340                         td->last_field_index = field->index;
 341                         return 1;
 342                 }
 343                 return 0;
 344
 345         case HID_UP_DIGITIZER:
 346                 switch (usage->hid) {
 347                 case HID_DG_INRANGE:
 348                         mt_store_field(usage, td, hi);
 349                         td->last_field_index = field->index;
 350                         return 1;
 351                 case HID_DG_CONFIDENCE:
 352                         mt_store_field(usage, td, hi);
 353                         td->last_field_index = field->index;
 354                         return 1;
 355                 case HID_DG_TIPSWITCH:
 356                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 357                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 358                         mt_store_field(usage, td, hi);
 359                         td->last_field_index = field->index;
 360                         return 1;
 361                 case HID_DG_CONTACTID:
 362                         mt_store_field(usage, td, hi);
 363                         td->last_field_index = field->index;
 364                         td->touches_by_report++;
 365                         return 1;
 366                 case HID_DG_WIDTH:
 367                         hid_map_usage(hi, usage, bit, max,
 368                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 369                         set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 370                                 cls->sn_width);
 371                         mt_store_field(usage, td, hi);
 372                         td->last_field_index = field->index;
 373                         return 1;
 374                 case HID_DG_HEIGHT:
 375                         hid_map_usage(hi, usage, bit, max,
 376                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 377                         set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 378                                 cls->sn_height);
 379                         input_set_abs_params(hi->input,
 380                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 381                         mt_store_field(usage, td, hi);
 382                         td->last_field_index = field->index;
 383                         return 1;
 384                 case HID_DG_TIPPRESSURE:
 385                         hid_map_usage(hi, usage, bit, max,
 386                                         EV_ABS, ABS_MT_PRESSURE);
 387                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 388                                 cls->sn_pressure);
 389                         mt_store_field(usage, td, hi);
 390                         td->last_field_index = field->index;
 391                         return 1;
 392                 case HID_DG_CONTACTCOUNT:
 393                         td->last_field_index = field->index;
 394                         return 1;
 395                 case HID_DG_CONTACTMAX:
 396                         /* we don't set td->last_slot_field as contactcount and
 397                          * contact max are global to the report */
 398                         td->last_field_index = field->index;
 399                         return -1;
 400                 }
 401                 case HID_DG_TOUCH:
 402                         /* Legacy devices use TIPSWITCH and not TOUCH.
 403                          * Let's just ignore this field. */
 404                         return -1;
 405                 /* let hid-input decide for the others */
 406                 return 0;
 407
 408         case HID_UP_BUTTON:
 409                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 410                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 411                 input_set_capability(hi->input, EV_KEY, code);
 412                 return 1;
 413
 414         case 0xff000000:
 415                 /* we do not want to map these: no input-oriented meaning */
 416                 return -1;
 417         }
 418
 419         return 0;
 420 }
 421
 422 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 423                 struct hid_field *field, struct hid_usage *usage,
 424                 unsigned long **bit, int *max)
 425 {
 426         if (usage->type == EV_KEY || usage->type == EV_ABS)
 427                 set_bit(usage->type, hi->input->evbit);
 428
 429         return -1;
 430 }
 431
 432 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 433 {
 434         __s32 quirks = td->mtclass.quirks;
 435
 436         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 437                 return td->curdata.contactid;
 438
 439         if (quirks & MT_QUIRK_CYPRESS)
 440                 return cypress_compute_slot(td);
 441
 442         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 443                 return td->num_received;
 444
 445         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 446                 return td->curdata.contactid - 1;
 447
 448         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 449 }
 450
 451 /*
 452  * this function is called when a whole contact has been processed,
 453  * so that it can assign it to a slot and store the data there
 454  */
 455 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 456 {
 457         if (td->curvalid) {
 458                 int slotnum = mt_compute_slot(td, input);
 459                 struct mt_slot *s = &td->curdata;
 460
 461                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 462                         return;
 463
 464                 input_mt_slot(input, slotnum);
 465                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
 466                         s->touch_state);
 467                 if (s->touch_state) {
 468                         /* this finger is on the screen */
 469                         int wide = (s->w > s->h);
 470                         /* divided by two to match visual scale of touch */
 471                         int major = max(s->w, s->h) >> 1;
 472                         int minor = min(s->w, s->h) >> 1;
 473
 474                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 475                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 476                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 477                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 478                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 479                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 480                 }
 481         }
 482
 483         td->num_received++;
 484 }
 485
 486 /*
 487  * this function is called when a whole packet has been received and processed,
 488  * so that it can decide what to send to the input layer.
 489  */
 490 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 491 {
 492         input_mt_sync_frame(input);
 493         input_sync(input);
 494         td->num_received = 0;
 495 }
 496
 497 static int mt_event(struct hid_device *hid, struct hid_field *field,
 498                                 struct hid_usage *usage, __s32 value)
 499 {
 500         struct mt_device *td = hid_get_drvdata(hid);
 501         __s32 quirks = td->mtclass.quirks;
 502
 503         if (hid->claimed & HID_CLAIMED_INPUT) {
 504                 switch (usage->hid) {
 505                 case HID_DG_INRANGE:
 506                         if (quirks & MT_QUIRK_ALWAYS_VALID)
 507                                 td->curvalid = true;
 508                         else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 509                                 td->curvalid = value;
 510                         break;
 511                 case HID_DG_TIPSWITCH:
 512                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 513                                 td->curvalid = value;
 514                         td->curdata.touch_state = value;
 515                         break;
 516                 case HID_DG_CONFIDENCE:
 517                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 518                                 td->curvalid = value;
 519                         break;
 520                 case HID_DG_CONTACTID:
 521                         td->curdata.contactid = value;
 522                         break;
 523                 case HID_DG_TIPPRESSURE:
 524                         td->curdata.p = value;
 525                         break;
 526                 case HID_GD_X:
 527                         td->curdata.x = value;
 528                         break;
 529                 case HID_GD_Y:
 530                         td->curdata.y = value;
 531                         break;
 532                 case HID_DG_WIDTH:
 533                         td->curdata.w = value;
 534                         break;
 535                 case HID_DG_HEIGHT:
 536                         td->curdata.h = value;
 537                         break;
 538                 case HID_DG_CONTACTCOUNT:
 539                         /*
 540                          * Includes multi-packet support where subsequent
 541                          * packets are sent with zero contactcount.
 542                          */
 543                         if (value)
 544                                 td->num_expected = value;
 545                         break;
 546                 case HID_DG_TOUCH:
 547                         /* do nothing */
 548                         break;
 549
 550                 default:
 551                         /* fallback to the generic hidinput handling */
 552                         return 0;
 553                 }
 554
 555                 if (usage->hid == td->last_slot_field)
 556                         mt_complete_slot(td, field->hidinput->input);
 557
 558                 if (field->index == td->last_field_index
 559                         && td->num_received >= td->num_expected)
 560                         mt_sync_frame(td, field->hidinput->input);
 561
 562         }
 563
 564         /* we have handled the hidinput part, now remains hiddev */
 565         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 566                 hid->hiddev_hid_event(hid, field, usage, value);
 567
 568         return 1;
 569 }
 570
 571 static void mt_set_input_mode(struct hid_device *hdev)
 572 {
 573         struct mt_device *td = hid_get_drvdata(hdev);
 574         struct hid_report *r;
 575         struct hid_report_enum *re;
 576
 577         if (td->inputmode < 0)
 578                 return;
 579
 580         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 581         r = re->report_id_hash[td->inputmode];
 582         if (r) {
 583                 r->field[0]->value[td->inputmode_index] = 0x02;
 584                 usbhid_submit_report(hdev, r, USB_DIR_OUT);
 585         }
 586 }
 587
 588 static void mt_set_maxcontacts(struct hid_device *hdev)
 589 {
 590         struct mt_device *td = hid_get_drvdata(hdev);
 591         struct hid_report *r;
 592         struct hid_report_enum *re;
 593         int fieldmax, max;
 594
 595         if (td->maxcontact_report_id < 0)
 596                 return;
 597
 598         if (!td->mtclass.maxcontacts)
 599                 return;
 600
 601         re = &hdev->report_enum[HID_FEATURE_REPORT];
 602         r = re->report_id_hash[td->maxcontact_report_id];
 603         if (r) {
 604                 max = td->mtclass.maxcontacts;
 605                 fieldmax = r->field[0]->logical_maximum;
 606                 max = min(fieldmax, max);
 607                 if (r->field[0]->value[0] != max) {
 608                         r->field[0]->value[0] = max;
 609                         usbhid_submit_report(hdev, r, USB_DIR_OUT);
 610                 }
 611         }
 612 }
 613
 614 static void mt_post_parse_default_settings(struct mt_device *td)
 615 {
 616         __s32 quirks = td->mtclass.quirks;
 617
 618         /* unknown serial device needs special quirks */
 619         if (td->touches_by_report == 1) {
 620                 quirks |= MT_QUIRK_ALWAYS_VALID;
 621                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 622                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 623                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 624         }
 625
 626         td->mtclass.quirks = quirks;
 627 }
 628
 629 static void mt_post_parse(struct mt_device *td)
 630 {
 631         struct mt_fields *f = td->fields;
 632
 633         if (td->touches_by_report > 0) {
 634                 int field_count_per_touch = f->length / td->touches_by_report;
 635                 td->last_slot_field = f->usages[field_count_per_touch - 1];
 636         }
 637 }
 638
 639 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 640
 641 {
 642         struct mt_device *td = hid_get_drvdata(hdev);
 643         struct mt_class *cls = &td->mtclass;
 644         struct input_dev *input = hi->input;
 645
 646         /* Only initialize slots for MT input devices */
 647         if (!test_bit(ABS_MT_POSITION_X, input->absbit))
 648                 return;
 649
 650         if (!td->maxcontacts)
 651                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 652
 653         mt_post_parse(td);
 654         if (td->serial_maybe)
 655                 mt_post_parse_default_settings(td);
 656
 657         if (cls->is_indirect)
 658                 td->mt_flags |= INPUT_MT_POINTER;
 659
 660         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 661                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 662
 663         input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 664
 665         td->mt_flags = 0;
 666 }
 667
 668 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 669 {
 670         int ret, i;
 671         struct mt_device *td;
 672         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 673
 674         if (id) {
 675                 for (i = 0; mt_classes[i].name ; i++) {
 676                         if (id->driver_data == mt_classes[i].name) {
 677                                 mtclass = &(mt_classes[i]);
 678                                 break;
 679                         }
 680                 }
 681         }
 682
 683         /* This allows the driver to correctly support devices
 684          * that emit events over several HID messages.
 685          */
 686         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 687
 688         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 689         if (!td) {
 690                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 691                 return -ENOMEM;
 692         }
 693         td->mtclass = *mtclass;
 694         td->inputmode = -1;
 695         td->maxcontact_report_id = -1;
 696         hid_set_drvdata(hdev, td);
 697
 698         td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
 699         if (!td->fields) {
 700                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
 701                 ret = -ENOMEM;
 702                 goto fail;
 703         }
 704
 705         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
 706                 td->serial_maybe = true;
 707
 708         ret = hid_parse(hdev);
 709         if (ret != 0)
 710                 goto fail;
 711
 712         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 713         if (ret)
 714                 goto fail;
 715
 716         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 717
 718         mt_set_maxcontacts(hdev);
 719         mt_set_input_mode(hdev);
 720
 721         kfree(td->fields);
 722         td->fields = NULL;
 723
 724         return 0;
 725
 726 fail:
 727         kfree(td->fields);
 728         kfree(td);
 729         return ret;
 730 }
 731
 732 #ifdef CONFIG_PM
 733 static int mt_reset_resume(struct hid_device *hdev)
 734 {
 735         mt_set_maxcontacts(hdev);
 736         mt_set_input_mode(hdev);
 737         return 0;
 738 }
 739 #endif
 740
 741 static void mt_remove(struct hid_device *hdev)
 742 {
 743         struct mt_device *td = hid_get_drvdata(hdev);
 744         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
 745         hid_hw_stop(hdev);
 746         kfree(td);
 747         hid_set_drvdata(hdev, NULL);
 748 }
 749
 750 static const struct hid_device_id mt_devices[] = {
 751
 752         /* 3M panels */
 753         { .driver_data = MT_CLS_3M,
 754                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 755                         USB_DEVICE_ID_3M1968) },
 756         { .driver_data = MT_CLS_3M,
 757                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 758                         USB_DEVICE_ID_3M2256) },
 759         { .driver_data = MT_CLS_3M,
 760                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 761                         USB_DEVICE_ID_3M3266) },
 762
 763         /* ActionStar panels */
 764         { .driver_data = MT_CLS_DEFAULT,
 765                 MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
 766                         USB_DEVICE_ID_ACTIONSTAR_1011) },
 767
 768         /* Atmel panels */
 769         { .driver_data = MT_CLS_SERIAL,
 770                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 771                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
 772         { .driver_data = MT_CLS_SERIAL,
 773                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 774                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
 775
 776         /* Baanto multitouch devices */
 777         { .driver_data = MT_CLS_DEFAULT,
 778                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
 779                         USB_DEVICE_ID_BAANTO_MT_190W2) },
 780         /* Cando panels */
 781         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 782                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 783                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
 784         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 785                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 786                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
 787         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 788                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 789                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
 790         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 791                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 792                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
 793
 794         /* Chunghwa Telecom touch panels */
 795         {  .driver_data = MT_CLS_DEFAULT,
 796                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 797                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 798
 799         /* CVTouch panels */
 800         { .driver_data = MT_CLS_DEFAULT,
 801                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 802                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
 803
 804         /* Cypress panel */
 805         { .driver_data = MT_CLS_CYPRESS,
 806                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
 807                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
 808
 809         /* eGalax devices (resistive) */
 810         { .driver_data = MT_CLS_EGALAX,
 811                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 812                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
 813         { .driver_data = MT_CLS_EGALAX,
 814                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 815                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
 816
 817         /* eGalax devices (capacitive) */
 818         { .driver_data = MT_CLS_EGALAX,
 819                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 820                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
 821         { .driver_data = MT_CLS_EGALAX_SERIAL,
 822                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 823                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
 824         { .driver_data = MT_CLS_EGALAX_SERIAL,
 825                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 826                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
 827         { .driver_data = MT_CLS_EGALAX_SERIAL,
 828                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 829                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
 830         { .driver_data = MT_CLS_EGALAX_SERIAL,
 831                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 832                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
 833         { .driver_data = MT_CLS_EGALAX,
 834                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 835                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
 836         { .driver_data = MT_CLS_EGALAX_SERIAL,
 837                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 838                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
 839         { .driver_data = MT_CLS_EGALAX,
 840                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 841                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
 842         { .driver_data = MT_CLS_EGALAX_SERIAL,
 843                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 844                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
 845         { .driver_data = MT_CLS_EGALAX,
 846                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 847                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
 848         { .driver_data = MT_CLS_EGALAX,
 849                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 850                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
 851         { .driver_data = MT_CLS_EGALAX_SERIAL,
 852                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 853                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
 854         { .driver_data = MT_CLS_EGALAX_SERIAL,
 855                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 856                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
 857
 858         /* Elo TouchSystems IntelliTouch Plus panel */
 859         { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
 860                 MT_USB_DEVICE(USB_VENDOR_ID_ELO,
 861                         USB_DEVICE_ID_ELO_TS2515) },
 862
 863         /* GeneralTouch panel */
 864         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 865                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
 866                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
 867
 868         /* Gametel game controller */
 869         { .driver_data = MT_CLS_DEFAULT,
 870                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
 871                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
 872
 873         /* GoodTouch panels */
 874         { .driver_data = MT_CLS_DEFAULT,
 875                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
 876                         USB_DEVICE_ID_GOODTOUCH_000f) },
 877
 878         /* Hanvon panels */
 879         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 880                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
 881                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
 882
 883         /* Ideacom panel */
 884         { .driver_data = MT_CLS_SERIAL,
 885                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 886                         USB_DEVICE_ID_IDEACOM_IDC6650) },
 887         { .driver_data = MT_CLS_SERIAL,
 888                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 889                         USB_DEVICE_ID_IDEACOM_IDC6651) },
 890
 891         /* Ilitek dual touch panel */
 892         {  .driver_data = MT_CLS_DEFAULT,
 893                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 894                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 895
 896         /* IRTOUCH panels */
 897         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 898                 MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
 899                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
 900
 901         /* LG Display panels */
 902         { .driver_data = MT_CLS_DEFAULT,
 903                 MT_USB_DEVICE(USB_VENDOR_ID_LG,
 904                         USB_DEVICE_ID_LG_MULTITOUCH) },
 905
 906         /* Lumio panels */
 907         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 908                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 909                         USB_DEVICE_ID_CRYSTALTOUCH) },
 910         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 911                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 912                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
 913
 914         /* MosArt panels */
 915         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 916                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 917                         USB_DEVICE_ID_ASUS_T91MT)},
 918         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 919                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 920                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
 921         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 922                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
 923                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
 924
 925         /* Panasonic panels */
 926         { .driver_data = MT_CLS_PANASONIC,
 927                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 928                         USB_DEVICE_ID_PANABOARD_UBT780) },
 929         { .driver_data = MT_CLS_PANASONIC,
 930                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 931                         USB_DEVICE_ID_PANABOARD_UBT880) },
 932
 933         /* Novatek Panel */
 934         { .driver_data = MT_CLS_DEFAULT,
 935                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
 936                         USB_DEVICE_ID_NOVATEK_PCT) },
 937
 938         /* PenMount panels */
 939         { .driver_data = MT_CLS_CONFIDENCE,
 940                 MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
 941                         USB_DEVICE_ID_PENMOUNT_PCI) },
 942
 943         /* PixArt optical touch screen */
 944         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 945                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 946                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
 947         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 948                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 949                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
 950         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
 951                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
 952                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
 953
 954         /* PixCir-based panels */
 955         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 956                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
 957                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
 958         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 959                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 960                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
 961
 962         /* Quanta-based panels */
 963         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 964                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 965                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
 966         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 967                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 968                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
 969         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 970                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 971                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
 972
 973         /* Stantum panels */
 974         { .driver_data = MT_CLS_CONFIDENCE,
 975                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
 976                         USB_DEVICE_ID_MTP)},
 977         { .driver_data = MT_CLS_CONFIDENCE,
 978                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
 979                         USB_DEVICE_ID_MTP_STM)},
 980         { .driver_data = MT_CLS_CONFIDENCE,
 981                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
 982                         USB_DEVICE_ID_MTP_SITRONIX)},
 983
 984         /* TopSeed panels */
 985         { .driver_data = MT_CLS_TOPSEED,
 986                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
 987                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
 988
 989         /* Touch International panels */
 990         { .driver_data = MT_CLS_DEFAULT,
 991                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
 992                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
 993
 994         /* Unitec panels */
 995         { .driver_data = MT_CLS_DEFAULT,
 996                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
 997                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
 998         { .driver_data = MT_CLS_DEFAULT,
 999                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1000                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1001         /* XAT */
1002         { .driver_data = MT_CLS_DEFAULT,
1003                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1004                         USB_DEVICE_ID_XAT_CSR) },
1005
1006         /* Xiroku */
1007         { .driver_data = MT_CLS_DEFAULT,
1008                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1009                         USB_DEVICE_ID_XIROKU_SPX) },
1010         { .driver_data = MT_CLS_DEFAULT,
1011                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1012                         USB_DEVICE_ID_XIROKU_MPX) },
1013         { .driver_data = MT_CLS_DEFAULT,
1014                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1015                         USB_DEVICE_ID_XIROKU_CSR) },
1016         { .driver_data = MT_CLS_DEFAULT,
1017                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1018                         USB_DEVICE_ID_XIROKU_SPX1) },
1019         { .driver_data = MT_CLS_DEFAULT,
1020                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1021                         USB_DEVICE_ID_XIROKU_MPX1) },
1022         { .driver_data = MT_CLS_DEFAULT,
1023                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1024                         USB_DEVICE_ID_XIROKU_CSR1) },
1025         { .driver_data = MT_CLS_DEFAULT,
1026                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1027                         USB_DEVICE_ID_XIROKU_SPX2) },
1028         { .driver_data = MT_CLS_DEFAULT,
1029                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1030                         USB_DEVICE_ID_XIROKU_MPX2) },
1031         { .driver_data = MT_CLS_DEFAULT,
1032                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1033                         USB_DEVICE_ID_XIROKU_CSR2) },
1034
1035         /* Zytronic panels */
1036         { .driver_data = MT_CLS_SERIAL,
1037                 MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
1038                         USB_DEVICE_ID_ZYTRONIC_ZXY100) },
1039
1040         /* Generic MT device */
1041         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1042         { }
1043 };
1044 MODULE_DEVICE_TABLE(hid, mt_devices);
1045
1046 static const struct hid_usage_id mt_grabbed_usages[] = {
1047         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1048         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1049 };
1050
1051 static struct hid_driver mt_driver = {
1052         .name = "hid-multitouch",
1053         .id_table = mt_devices,
1054         .probe = mt_probe,
1055         .remove = mt_remove,
1056         .input_mapping = mt_input_mapping,
1057         .input_mapped = mt_input_mapped,
1058         .input_configured = mt_input_configured,
1059         .feature_mapping = mt_feature_mapping,
1060         .usage_table = mt_grabbed_usages,
1061         .event = mt_event,
1062 #ifdef CONFIG_PM
1063         .reset_resume = mt_reset_resume,
1064 #endif
1065 };
1066
1067 static int __init mt_init(void)
1068 {
1069         return hid_register_driver(&mt_driver);
1070 }
1071
1072 static void __exit mt_exit(void)
1073 {
1074         hid_unregister_driver(&mt_driver);
1075 }
1076
1077 module_init(mt_init);
1078 module_exit(mt_exit);