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 #define MT_QUIRK_NO_AREA                (1 << 9)
  55 #define MT_QUIRK_IGNORE_DUPLICATES      (1 << 10)
  56 #define MT_QUIRK_HOVERING               (1 << 11)
  57 #define MT_QUIRK_CONTACT_CNT_ACCURATE   (1 << 12)
  58
  59 struct mt_slot {
  60         __s32 x, y, cx, cy, p, w, h;
  61         __s32 contactid;        /* the device ContactID assigned to this slot */
  62         bool touch_state;       /* is the touch valid? */
  63         bool inrange_state;     /* is the finger in proximity of the sensor? */
  64 };
  65
  66 struct mt_class {
  67         __s32 name;     /* MT_CLS */
  68         __s32 quirks;
  69         __s32 sn_move;  /* Signal/noise ratio for move events */
  70         __s32 sn_width; /* Signal/noise ratio for width events */
  71         __s32 sn_height;        /* Signal/noise ratio for height events */
  72         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  73         __u8 maxcontacts;
  74         bool is_indirect;       /* true for touchpads */
  75 };
  76
  77 struct mt_fields {
  78         unsigned usages[HID_MAX_FIELDS];
  79         unsigned int length;
  80 };
  81
  82 struct mt_device {
  83         struct mt_slot curdata; /* placeholder of incoming data */
  84         struct mt_class mtclass;        /* our mt device class */
  85         struct mt_fields *fields;       /* temporary placeholder for storing the
  86                                            multitouch fields */
  87         __s32 *contactcount;            /* contact count value in the report */
  88         unsigned last_field_index;      /* last field index of the report */
  89         unsigned last_slot_field;       /* the last field of a slot */
  90         unsigned mt_report_id;  /* the report ID of the multitouch device */
  91         __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
  92         __s8 inputmode_index;   /* InputMode HID feature index in the report */
  93         __s8 maxcontact_report_id;      /* Maximum Contact Number HID feature,
  94                                    -1 if non-existent */
  95         __u8 num_received;      /* how many contacts we received */
  96         __u8 num_expected;      /* expected last contact index */
  97         __u8 maxcontacts;
  98         __u8 touches_by_report; /* how many touches are present in one report:
  99                                 * 1 means we should use a serial protocol
 100                                 * > 1 means hybrid (multitouch) protocol */
 101         bool serial_maybe;      /* need to check for serial protocol */
 102         bool curvalid;          /* is the current contact valid? */
 103         unsigned mt_flags;      /* flags to pass to input-mt */
 104 };
 105
 106 /* classes of device behavior */
 107 #define MT_CLS_DEFAULT                          0x0001
 108
 109 #define MT_CLS_SERIAL                           0x0002
 110 #define MT_CLS_CONFIDENCE                       0x0003
 111 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 112 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 113 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 114 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 115 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
 116 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 117 #define MT_CLS_ALWAYS_TRUE                      0x000a
 118
 119 /* vendor specific classes */
 120 #define MT_CLS_3M                               0x0101
 121 #define MT_CLS_CYPRESS                          0x0102
 122 #define MT_CLS_EGALAX                           0x0103
 123 #define MT_CLS_EGALAX_SERIAL                    0x0104
 124 #define MT_CLS_TOPSEED                          0x0105
 125 #define MT_CLS_PANASONIC                        0x0106
 126 #define MT_CLS_FLATFROG                         0x0107
 127 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 128 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 129
 130 #define MT_DEFAULT_MAXCONTACT   10
 131 #define MT_MAX_MAXCONTACT       250
 132
 133 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 134 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 135
 136 /*
 137  * these device-dependent functions determine what slot corresponds
 138  * to a valid contact that was just read.
 139  */
 140
 141 static int cypress_compute_slot(struct mt_device *td)
 142 {
 143         if (td->curdata.contactid != 0 || td->num_received == 0)
 144                 return td->curdata.contactid;
 145         else
 146                 return -1;
 147 }
 148
 149 static struct mt_class mt_classes[] = {
 150         { .name = MT_CLS_DEFAULT,
 151                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 152         { .name = MT_CLS_SERIAL,
 153                 .quirks = MT_QUIRK_ALWAYS_VALID},
 154         { .name = MT_CLS_CONFIDENCE,
 155                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 156         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 157                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 158                         MT_QUIRK_SLOT_IS_CONTACTID },
 159         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 160                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 161                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 162         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 163                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 164                         MT_QUIRK_SLOT_IS_CONTACTID,
 165                 .maxcontacts = 2 },
 166         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 167                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 168                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 169                 .maxcontacts = 2 },
 170         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 171                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 172                         MT_QUIRK_SLOT_IS_CONTACTID,
 173                 .maxcontacts = 2 },
 174         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 175                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 176                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 177         { .name = MT_CLS_ALWAYS_TRUE,
 178                 .quirks = MT_QUIRK_ALWAYS_VALID |
 179                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 180
 181         /*
 182          * vendor specific classes
 183          */
 184         { .name = MT_CLS_3M,
 185                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 186                         MT_QUIRK_SLOT_IS_CONTACTID,
 187                 .sn_move = 2048,
 188                 .sn_width = 128,
 189                 .sn_height = 128,
 190                 .maxcontacts = 60,
 191         },
 192         { .name = MT_CLS_CYPRESS,
 193                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 194                         MT_QUIRK_CYPRESS,
 195                 .maxcontacts = 10 },
 196         { .name = MT_CLS_EGALAX,
 197                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 198                         MT_QUIRK_VALID_IS_INRANGE,
 199                 .sn_move = 4096,
 200                 .sn_pressure = 32,
 201         },
 202         { .name = MT_CLS_EGALAX_SERIAL,
 203                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 204                         MT_QUIRK_ALWAYS_VALID,
 205                 .sn_move = 4096,
 206                 .sn_pressure = 32,
 207         },
 208         { .name = MT_CLS_TOPSEED,
 209                 .quirks = MT_QUIRK_ALWAYS_VALID,
 210                 .is_indirect = true,
 211                 .maxcontacts = 2,
 212         },
 213         { .name = MT_CLS_PANASONIC,
 214                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 215                 .maxcontacts = 4 },
 216         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 217                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 218                         MT_QUIRK_VALID_IS_INRANGE |
 219                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 220                 .maxcontacts = 2
 221         },
 222         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 223                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 224                         MT_QUIRK_SLOT_IS_CONTACTNUMBER
 225         },
 226
 227         { .name = MT_CLS_FLATFROG,
 228                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 229                         MT_QUIRK_NO_AREA,
 230                 .sn_move = 2048,
 231                 .maxcontacts = 40,
 232         },
 233         { }
 234 };
 235
 236 static ssize_t mt_show_quirks(struct device *dev,
 237                            struct device_attribute *attr,
 238                            char *buf)
 239 {
 240         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 241         struct mt_device *td = hid_get_drvdata(hdev);
 242
 243         return sprintf(buf, "%u\n", td->mtclass.quirks);
 244 }
 245
 246 static ssize_t mt_set_quirks(struct device *dev,
 247                           struct device_attribute *attr,
 248                           const char *buf, size_t count)
 249 {
 250         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 251         struct mt_device *td = hid_get_drvdata(hdev);
 252
 253         unsigned long val;
 254
 255         if (kstrtoul(buf, 0, &val))
 256                 return -EINVAL;
 257
 258         td->mtclass.quirks = val;
 259
 260         if (!td->contactcount)
 261                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 262
 263         return count;
 264 }
 265
 266 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 267
 268 static struct attribute *sysfs_attrs[] = {
 269         &dev_attr_quirks.attr,
 270         NULL
 271 };
 272
 273 static struct attribute_group mt_attribute_group = {
 274         .attrs = sysfs_attrs
 275 };
 276
 277 static void mt_feature_mapping(struct hid_device *hdev,
 278                 struct hid_field *field, struct hid_usage *usage)
 279 {
 280         struct mt_device *td = hid_get_drvdata(hdev);
 281         int i;
 282
 283         switch (usage->hid) {
 284         case HID_DG_INPUTMODE:
 285                 td->inputmode = field->report->id;
 286                 td->inputmode_index = 0; /* has to be updated below */
 287
 288                 for (i=0; i < field->maxusage; i++) {
 289                         if (field->usage[i].hid == usage->hid) {
 290                                 td->inputmode_index = i;
 291                                 break;
 292                         }
 293                 }
 294
 295                 break;
 296         case HID_DG_CONTACTMAX:
 297                 td->maxcontact_report_id = field->report->id;
 298                 td->maxcontacts = field->value[0];
 299                 if (!td->maxcontacts &&
 300                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 301                         td->maxcontacts = field->logical_maximum;
 302                 if (td->mtclass.maxcontacts)
 303                         /* check if the maxcontacts is given by the class */
 304                         td->maxcontacts = td->mtclass.maxcontacts;
 305
 306                 break;
 307         case 0xff0000c5:
 308                 if (field->report_count == 256 && field->report_size == 8) {
 309                         /* Win 8 devices need special quirks */
 310                         __s32 *quirks = &td->mtclass.quirks;
 311                         *quirks |= MT_QUIRK_ALWAYS_VALID;
 312                         *quirks |= MT_QUIRK_IGNORE_DUPLICATES;
 313                         *quirks |= MT_QUIRK_HOVERING;
 314                         *quirks |= MT_QUIRK_CONTACT_CNT_ACCURATE;
 315                         *quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 316                         *quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 317                         *quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 318                 }
 319                 break;
 320         }
 321 }
 322
 323 static void set_abs(struct input_dev *input, unsigned int code,
 324                 struct hid_field *field, int snratio)
 325 {
 326         int fmin = field->logical_minimum;
 327         int fmax = field->logical_maximum;
 328         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 329         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 330         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 331 }
 332
 333 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 334                 struct hid_input *hi)
 335 {
 336         struct mt_fields *f = td->fields;
 337
 338         if (f->length >= HID_MAX_FIELDS)
 339                 return;
 340
 341         f->usages[f->length++] = usage->hid;
 342 }
 343
 344 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 345                 struct hid_field *field, struct hid_usage *usage,
 346                 unsigned long **bit, int *max)
 347 {
 348         struct mt_device *td = hid_get_drvdata(hdev);
 349         struct mt_class *cls = &td->mtclass;
 350         int code;
 351         struct hid_usage *prev_usage = NULL;
 352
 353         /* Only map fields from TouchScreen or TouchPad collections.
 354         * We need to ignore fields that belong to other collections
 355         * such as Mouse that might have the same GenericDesktop usages. */
 356         if (field->application == HID_DG_TOUCHSCREEN)
 357                 td->mt_flags |= INPUT_MT_DIRECT;
 358         else if (field->application != HID_DG_TOUCHPAD)
 359                 return 0;
 360
 361         /*
 362          * Model touchscreens providing buttons as touchpads.
 363          */
 364         if (field->application == HID_DG_TOUCHPAD ||
 365             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 366                 td->mt_flags |= INPUT_MT_POINTER;
 367
 368         /* eGalax devices provide a Digitizer.Stylus input which overrides
 369          * the correct Digitizers.Finger X/Y ranges.
 370          * Let's just ignore this input. */
 371         if (field->physical == HID_DG_STYLUS)
 372                 return -1;
 373
 374         if (usage->usage_index)
 375                 prev_usage = &field->usage[usage->usage_index - 1];
 376
 377         switch (usage->hid & HID_USAGE_PAGE) {
 378
 379         case HID_UP_GENDESK:
 380                 switch (usage->hid) {
 381                 case HID_GD_X:
 382                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 383                                 hid_map_usage(hi, usage, bit, max,
 384                                         EV_ABS, ABS_MT_TOOL_X);
 385                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
 386                                         cls->sn_move);
 387                         } else {
 388                                 hid_map_usage(hi, usage, bit, max,
 389                                         EV_ABS, ABS_MT_POSITION_X);
 390                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
 391                                         cls->sn_move);
 392                         }
 393
 394                         mt_store_field(usage, td, hi);
 395                         td->last_field_index = field->index;
 396                         return 1;
 397                 case HID_GD_Y:
 398                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 399                                 hid_map_usage(hi, usage, bit, max,
 400                                         EV_ABS, ABS_MT_TOOL_Y);
 401                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
 402                                         cls->sn_move);
 403                         } else {
 404                                 hid_map_usage(hi, usage, bit, max,
 405                                         EV_ABS, ABS_MT_POSITION_Y);
 406                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
 407                                         cls->sn_move);
 408                         }
 409
 410                         mt_store_field(usage, td, hi);
 411                         td->last_field_index = field->index;
 412                         return 1;
 413                 }
 414                 return 0;
 415
 416         case HID_UP_DIGITIZER:
 417                 switch (usage->hid) {
 418                 case HID_DG_INRANGE:
 419                         if (cls->quirks & MT_QUIRK_HOVERING) {
 420                                 hid_map_usage(hi, usage, bit, max,
 421                                         EV_ABS, ABS_MT_DISTANCE);
 422                                 input_set_abs_params(hi->input,
 423                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 424                         }
 425                         mt_store_field(usage, td, hi);
 426                         td->last_field_index = field->index;
 427                         return 1;
 428                 case HID_DG_CONFIDENCE:
 429                         mt_store_field(usage, td, hi);
 430                         td->last_field_index = field->index;
 431                         return 1;
 432                 case HID_DG_TIPSWITCH:
 433                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 434                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 435                         mt_store_field(usage, td, hi);
 436                         td->last_field_index = field->index;
 437                         return 1;
 438                 case HID_DG_CONTACTID:
 439                         mt_store_field(usage, td, hi);
 440                         td->last_field_index = field->index;
 441                         td->touches_by_report++;
 442                         td->mt_report_id = field->report->id;
 443                         return 1;
 444                 case HID_DG_WIDTH:
 445                         hid_map_usage(hi, usage, bit, max,
 446                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 447                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
 448                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 449                                         cls->sn_width);
 450                         mt_store_field(usage, td, hi);
 451                         td->last_field_index = field->index;
 452                         return 1;
 453                 case HID_DG_HEIGHT:
 454                         hid_map_usage(hi, usage, bit, max,
 455                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 456                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 457                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 458                                         cls->sn_height);
 459                                 input_set_abs_params(hi->input,
 460                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 461                         }
 462                         mt_store_field(usage, td, hi);
 463                         td->last_field_index = field->index;
 464                         return 1;
 465                 case HID_DG_TIPPRESSURE:
 466                         hid_map_usage(hi, usage, bit, max,
 467                                         EV_ABS, ABS_MT_PRESSURE);
 468                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 469                                 cls->sn_pressure);
 470                         mt_store_field(usage, td, hi);
 471                         td->last_field_index = field->index;
 472                         return 1;
 473                 case HID_DG_CONTACTCOUNT:
 474                         td->contactcount = field->value + usage->usage_index;
 475                         td->last_field_index = field->index;
 476                         return 1;
 477                 case HID_DG_CONTACTMAX:
 478                         /* we don't set td->last_slot_field as contactcount and
 479                          * contact max are global to the report */
 480                         td->last_field_index = field->index;
 481                         return -1;
 482                 case HID_DG_TOUCH:
 483                         /* Legacy devices use TIPSWITCH and not TOUCH.
 484                          * Let's just ignore this field. */
 485                         return -1;
 486                 }
 487                 /* let hid-input decide for the others */
 488                 return 0;
 489
 490         case HID_UP_BUTTON:
 491                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 492                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 493                 input_set_capability(hi->input, EV_KEY, code);
 494                 return 1;
 495
 496         case 0xff000000:
 497                 /* we do not want to map these: no input-oriented meaning */
 498                 return -1;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 505                 struct hid_field *field, struct hid_usage *usage,
 506                 unsigned long **bit, int *max)
 507 {
 508         if (usage->type == EV_KEY || usage->type == EV_ABS)
 509                 set_bit(usage->type, hi->input->evbit);
 510
 511         return -1;
 512 }
 513
 514 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 515 {
 516         __s32 quirks = td->mtclass.quirks;
 517
 518         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 519                 return td->curdata.contactid;
 520
 521         if (quirks & MT_QUIRK_CYPRESS)
 522                 return cypress_compute_slot(td);
 523
 524         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 525                 return td->num_received;
 526
 527         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 528                 return td->curdata.contactid - 1;
 529
 530         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 531 }
 532
 533 /*
 534  * this function is called when a whole contact has been processed,
 535  * so that it can assign it to a slot and store the data there
 536  */
 537 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 538 {
 539         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 540             td->num_received >= td->num_expected)
 541                 return;
 542
 543         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
 544                 int slotnum = mt_compute_slot(td, input);
 545                 struct mt_slot *s = &td->curdata;
 546                 struct input_mt *mt = input->mt;
 547
 548                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 549                         return;
 550
 551                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
 552                         struct input_mt_slot *slot = &mt->slots[slotnum];
 553                         if (input_mt_is_active(slot) &&
 554                             input_mt_is_used(mt, slot))
 555                                 return;
 556                 }
 557
 558                 input_mt_slot(input, slotnum);
 559                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
 560                         s->touch_state || s->inrange_state);
 561                 if (s->touch_state || s->inrange_state) {
 562                         /* this finger is in proximity of the sensor */
 563                         int wide = (s->w > s->h);
 564                         /* divided by two to match visual scale of touch */
 565                         int major = max(s->w, s->h) >> 1;
 566                         int minor = min(s->w, s->h) >> 1;
 567
 568                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 569                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 570                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
 571                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
 572                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
 573                                 !s->touch_state);
 574                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 575                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 576                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 577                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 578                 }
 579         }
 580
 581         td->num_received++;
 582 }
 583
 584 /*
 585  * this function is called when a whole packet has been received and processed,
 586  * so that it can decide what to send to the input layer.
 587  */
 588 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 589 {
 590         input_mt_sync_frame(input);
 591         input_sync(input);
 592         td->num_received = 0;
 593 }
 594
 595 static int mt_event(struct hid_device *hid, struct hid_field *field,
 596                                 struct hid_usage *usage, __s32 value)
 597 {
 598         /* we will handle the hidinput part later, now remains hiddev */
 599         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 600                 hid->hiddev_hid_event(hid, field, usage, value);
 601
 602         return 1;
 603 }
 604
 605 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 606                                 struct hid_usage *usage, __s32 value)
 607 {
 608         struct mt_device *td = hid_get_drvdata(hid);
 609         __s32 quirks = td->mtclass.quirks;
 610
 611         if (hid->claimed & HID_CLAIMED_INPUT) {
 612                 switch (usage->hid) {
 613                 case HID_DG_INRANGE:
 614                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 615                                 td->curvalid = value;
 616                         if (quirks & MT_QUIRK_HOVERING)
 617                                 td->curdata.inrange_state = value;
 618                         break;
 619                 case HID_DG_TIPSWITCH:
 620                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 621                                 td->curvalid = value;
 622                         td->curdata.touch_state = value;
 623                         break;
 624                 case HID_DG_CONFIDENCE:
 625                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 626                                 td->curvalid = value;
 627                         break;
 628                 case HID_DG_CONTACTID:
 629                         td->curdata.contactid = value;
 630                         break;
 631                 case HID_DG_TIPPRESSURE:
 632                         td->curdata.p = value;
 633                         break;
 634                 case HID_GD_X:
 635                         if (usage->code == ABS_MT_TOOL_X)
 636                                 td->curdata.cx = value;
 637                         else
 638                                 td->curdata.x = value;
 639                         break;
 640                 case HID_GD_Y:
 641                         if (usage->code == ABS_MT_TOOL_Y)
 642                                 td->curdata.cy = value;
 643                         else
 644                                 td->curdata.y = value;
 645                         break;
 646                 case HID_DG_WIDTH:
 647                         td->curdata.w = value;
 648                         break;
 649                 case HID_DG_HEIGHT:
 650                         td->curdata.h = value;
 651                         break;
 652                 case HID_DG_CONTACTCOUNT:
 653                         break;
 654                 case HID_DG_TOUCH:
 655                         /* do nothing */
 656                         break;
 657
 658                 default:
 659                         return;
 660                 }
 661
 662                 if (usage->usage_index + 1 == field->report_count) {
 663                         /* we only take into account the last report. */
 664                         if (usage->hid == td->last_slot_field)
 665                                 mt_complete_slot(td, field->hidinput->input);
 666
 667                         if (field->index == td->last_field_index
 668                                 && td->num_received >= td->num_expected)
 669                                 mt_sync_frame(td, field->hidinput->input);
 670                 }
 671
 672         }
 673 }
 674
 675 static void mt_report(struct hid_device *hid, struct hid_report *report)
 676 {
 677         struct mt_device *td = hid_get_drvdata(hid);
 678         struct hid_field *field;
 679         unsigned count;
 680         int r, n;
 681
 682         if (report->id != td->mt_report_id)
 683                 return;
 684
 685         if (!(hid->claimed & HID_CLAIMED_INPUT))
 686                 return;
 687
 688         /*
 689          * Includes multi-packet support where subsequent
 690          * packets are sent with zero contactcount.
 691          */
 692         if (td->contactcount && *td->contactcount)
 693                 td->num_expected = *td->contactcount;
 694
 695         for (r = 0; r < report->maxfield; r++) {
 696                 field = report->field[r];
 697                 count = field->report_count;
 698
 699                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 700                         continue;
 701
 702                 for (n = 0; n < count; n++)
 703                         mt_process_mt_event(hid, field, &field->usage[n],
 704                                         field->value[n]);
 705         }
 706 }
 707
 708 static void mt_set_input_mode(struct hid_device *hdev)
 709 {
 710         struct mt_device *td = hid_get_drvdata(hdev);
 711         struct hid_report *r;
 712         struct hid_report_enum *re;
 713
 714         if (td->inputmode < 0)
 715                 return;
 716
 717         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 718         r = re->report_id_hash[td->inputmode];
 719         if (r) {
 720                 r->field[0]->value[td->inputmode_index] = 0x02;
 721                 usbhid_submit_report(hdev, r, USB_DIR_OUT);
 722         }
 723 }
 724
 725 static void mt_set_maxcontacts(struct hid_device *hdev)
 726 {
 727         struct mt_device *td = hid_get_drvdata(hdev);
 728         struct hid_report *r;
 729         struct hid_report_enum *re;
 730         int fieldmax, max;
 731
 732         if (td->maxcontact_report_id < 0)
 733                 return;
 734
 735         if (!td->mtclass.maxcontacts)
 736                 return;
 737
 738         re = &hdev->report_enum[HID_FEATURE_REPORT];
 739         r = re->report_id_hash[td->maxcontact_report_id];
 740         if (r) {
 741                 max = td->mtclass.maxcontacts;
 742                 fieldmax = r->field[0]->logical_maximum;
 743                 max = min(fieldmax, max);
 744                 if (r->field[0]->value[0] != max) {
 745                         r->field[0]->value[0] = max;
 746                         usbhid_submit_report(hdev, r, USB_DIR_OUT);
 747                 }
 748         }
 749 }
 750
 751 static void mt_post_parse_default_settings(struct mt_device *td)
 752 {
 753         __s32 quirks = td->mtclass.quirks;
 754
 755         /* unknown serial device needs special quirks */
 756         if (td->touches_by_report == 1) {
 757                 quirks |= MT_QUIRK_ALWAYS_VALID;
 758                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 759                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 760                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 761                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 762         }
 763
 764         td->mtclass.quirks = quirks;
 765 }
 766
 767 static void mt_post_parse(struct mt_device *td)
 768 {
 769         struct mt_fields *f = td->fields;
 770         struct mt_class *cls = &td->mtclass;
 771
 772         if (td->touches_by_report > 0) {
 773                 int field_count_per_touch = f->length / td->touches_by_report;
 774                 td->last_slot_field = f->usages[field_count_per_touch - 1];
 775         }
 776
 777         if (!td->contactcount)
 778                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 779 }
 780
 781 static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 782
 783 {
 784         struct mt_device *td = hid_get_drvdata(hdev);
 785         struct mt_class *cls = &td->mtclass;
 786         struct input_dev *input = hi->input;
 787
 788         /* Only initialize slots for MT input devices */
 789         if (!test_bit(ABS_MT_POSITION_X, input->absbit))
 790                 return;
 791
 792         if (!td->maxcontacts)
 793                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 794
 795         mt_post_parse(td);
 796         if (td->serial_maybe)
 797                 mt_post_parse_default_settings(td);
 798
 799         if (cls->is_indirect)
 800                 td->mt_flags |= INPUT_MT_POINTER;
 801
 802         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 803                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 804
 805         input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 806
 807         td->mt_flags = 0;
 808 }
 809
 810 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 811 {
 812         int ret, i;
 813         struct mt_device *td;
 814         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 815
 816         for (i = 0; mt_classes[i].name ; i++) {
 817                 if (id->driver_data == mt_classes[i].name) {
 818                         mtclass = &(mt_classes[i]);
 819                         break;
 820                 }
 821         }
 822
 823         /* This allows the driver to correctly support devices
 824          * that emit events over several HID messages.
 825          */
 826         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 827
 828         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 829         if (!td) {
 830                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 831                 return -ENOMEM;
 832         }
 833         td->mtclass = *mtclass;
 834         td->inputmode = -1;
 835         td->maxcontact_report_id = -1;
 836         hid_set_drvdata(hdev, td);
 837
 838         td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
 839         if (!td->fields) {
 840                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
 841                 ret = -ENOMEM;
 842                 goto fail;
 843         }
 844
 845         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
 846                 td->serial_maybe = true;
 847
 848         ret = hid_parse(hdev);
 849         if (ret != 0)
 850                 goto fail;
 851
 852         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 853         if (ret)
 854                 goto fail;
 855
 856         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 857
 858         mt_set_maxcontacts(hdev);
 859         mt_set_input_mode(hdev);
 860
 861         kfree(td->fields);
 862         td->fields = NULL;
 863
 864         return 0;
 865
 866 fail:
 867         kfree(td->fields);
 868         kfree(td);
 869         return ret;
 870 }
 871
 872 #ifdef CONFIG_PM
 873 static int mt_reset_resume(struct hid_device *hdev)
 874 {
 875         mt_set_maxcontacts(hdev);
 876         mt_set_input_mode(hdev);
 877         return 0;
 878 }
 879
 880 static int mt_resume(struct hid_device *hdev)
 881 {
 882         struct usb_interface *intf;
 883         struct usb_host_interface *interface;
 884         struct usb_device *dev;
 885
 886         if (hdev->bus != BUS_USB)
 887                 return 0;
 888
 889         intf = to_usb_interface(hdev->dev.parent);
 890         interface = intf->cur_altsetting;
 891         dev = hid_to_usb_dev(hdev);
 892
 893         /* Some Elan legacy devices require SET_IDLE to be set on resume.
 894          * It should be safe to send it to other devices too.
 895          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
 896
 897         usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 898                         HID_REQ_SET_IDLE,
 899                         USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 900                         0, interface->desc.bInterfaceNumber,
 901                         NULL, 0, USB_CTRL_SET_TIMEOUT);
 902
 903         return 0;
 904 }
 905 #endif
 906
 907 static void mt_remove(struct hid_device *hdev)
 908 {
 909         struct mt_device *td = hid_get_drvdata(hdev);
 910         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
 911         hid_hw_stop(hdev);
 912         kfree(td);
 913         hid_set_drvdata(hdev, NULL);
 914 }
 915
 916 static const struct hid_device_id mt_devices[] = {
 917
 918         /* 3M panels */
 919         { .driver_data = MT_CLS_3M,
 920                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 921                         USB_DEVICE_ID_3M1968) },
 922         { .driver_data = MT_CLS_3M,
 923                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 924                         USB_DEVICE_ID_3M2256) },
 925         { .driver_data = MT_CLS_3M,
 926                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
 927                         USB_DEVICE_ID_3M3266) },
 928
 929         /* ActionStar panels */
 930         { .driver_data = MT_CLS_DEFAULT,
 931                 MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
 932                         USB_DEVICE_ID_ACTIONSTAR_1011) },
 933
 934         /* Atmel panels */
 935         { .driver_data = MT_CLS_SERIAL,
 936                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 937                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
 938         { .driver_data = MT_CLS_SERIAL,
 939                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 940                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
 941
 942         /* Baanto multitouch devices */
 943         { .driver_data = MT_CLS_DEFAULT,
 944                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
 945                         USB_DEVICE_ID_BAANTO_MT_190W2) },
 946         /* Cando panels */
 947         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 948                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 949                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
 950         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 951                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 952                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
 953         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 954                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 955                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
 956         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 957                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 958                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
 959
 960         /* Chunghwa Telecom touch panels */
 961         {  .driver_data = MT_CLS_DEFAULT,
 962                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 963                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 964
 965         /* CVTouch panels */
 966         { .driver_data = MT_CLS_DEFAULT,
 967                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 968                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
 969
 970         /* Cypress panel */
 971         { .driver_data = MT_CLS_CYPRESS,
 972                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
 973                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
 974
 975         /* eGalax devices (resistive) */
 976         { .driver_data = MT_CLS_EGALAX,
 977                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 978                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
 979         { .driver_data = MT_CLS_EGALAX,
 980                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 981                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
 982
 983         /* eGalax devices (capacitive) */
 984         { .driver_data = MT_CLS_EGALAX,
 985                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 986                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
 987         { .driver_data = MT_CLS_EGALAX_SERIAL,
 988                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 989                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
 990         { .driver_data = MT_CLS_EGALAX_SERIAL,
 991                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 992                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
 993         { .driver_data = MT_CLS_EGALAX_SERIAL,
 994                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 995                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
 996         { .driver_data = MT_CLS_EGALAX_SERIAL,
 997                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 998                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
 999         { .driver_data = MT_CLS_EGALAX,
1000                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1001                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1002         { .driver_data = MT_CLS_EGALAX_SERIAL,
1003                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1004                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1005         { .driver_data = MT_CLS_EGALAX,
1006                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1007                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1008         { .driver_data = MT_CLS_EGALAX_SERIAL,
1009                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1010                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1011         { .driver_data = MT_CLS_EGALAX,
1012                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1013                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1014         { .driver_data = MT_CLS_EGALAX,
1015                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1016                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1017         { .driver_data = MT_CLS_EGALAX_SERIAL,
1018                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1019                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1020         { .driver_data = MT_CLS_EGALAX_SERIAL,
1021                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1022                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1023         { .driver_data = MT_CLS_EGALAX_SERIAL,
1024                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1025                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1026         { .driver_data = MT_CLS_EGALAX,
1027                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1028                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1029         { .driver_data = MT_CLS_EGALAX,
1030                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1031                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1032         { .driver_data = MT_CLS_EGALAX,
1033                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1034                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1035
1036         /* Elo TouchSystems IntelliTouch Plus panel */
1037         { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
1038                 MT_USB_DEVICE(USB_VENDOR_ID_ELO,
1039                         USB_DEVICE_ID_ELO_TS2515) },
1040
1041         /* Flatfrog Panels */
1042         { .driver_data = MT_CLS_FLATFROG,
1043                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1044                         USB_DEVICE_ID_MULTITOUCH_3200) },
1045
1046         /* GeneralTouch panel */
1047         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1048                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1049                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1050         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1051                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1052                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1053
1054         /* Gametel game controller */
1055         { .driver_data = MT_CLS_DEFAULT,
1056                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1057                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1058
1059         /* GoodTouch panels */
1060         { .driver_data = MT_CLS_DEFAULT,
1061                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1062                         USB_DEVICE_ID_GOODTOUCH_000f) },
1063
1064         /* Hanvon panels */
1065         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1066                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1067                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1068
1069         /* Ideacom panel */
1070         { .driver_data = MT_CLS_SERIAL,
1071                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1072                         USB_DEVICE_ID_IDEACOM_IDC6650) },
1073         { .driver_data = MT_CLS_SERIAL,
1074                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1075                         USB_DEVICE_ID_IDEACOM_IDC6651) },
1076
1077         /* Ilitek dual touch panel */
1078         {  .driver_data = MT_CLS_DEFAULT,
1079                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1080                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1081
1082         /* IRTOUCH panels */
1083         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1084                 MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
1085                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
1086
1087         /* LG Display panels */
1088         { .driver_data = MT_CLS_DEFAULT,
1089                 MT_USB_DEVICE(USB_VENDOR_ID_LG,
1090                         USB_DEVICE_ID_LG_MULTITOUCH) },
1091
1092         /* Lumio panels */
1093         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1094                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1095                         USB_DEVICE_ID_CRYSTALTOUCH) },
1096         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1097                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1098                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
1099
1100         /* MosArt panels */
1101         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1102                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1103                         USB_DEVICE_ID_ASUS_T91MT)},
1104         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1105                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1106                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1107         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1108                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1109                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1110
1111         /* Nexio panels */
1112         { .driver_data = MT_CLS_ALWAYS_TRUE,
1113                 MT_USB_DEVICE(USB_VENDOR_ID_NEXIO,
1114                         USB_DEVICE_ID_NEXIO_MULTITOUCH_420)},
1115
1116         /* Panasonic panels */
1117         { .driver_data = MT_CLS_PANASONIC,
1118                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1119                         USB_DEVICE_ID_PANABOARD_UBT780) },
1120         { .driver_data = MT_CLS_PANASONIC,
1121                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1122                         USB_DEVICE_ID_PANABOARD_UBT880) },
1123
1124         /* Novatek Panel */
1125         { .driver_data = MT_CLS_DEFAULT,
1126                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1127                         USB_DEVICE_ID_NOVATEK_PCT) },
1128
1129         /* PenMount panels */
1130         { .driver_data = MT_CLS_CONFIDENCE,
1131                 MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
1132                         USB_DEVICE_ID_PENMOUNT_PCI) },
1133
1134         /* PixArt optical touch screen */
1135         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1136                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1137                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1138         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1139                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1140                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1141         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1142                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1143                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1144
1145         /* PixCir-based panels */
1146         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1147                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
1148                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
1149         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1150                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1151                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1152
1153         /* Quanta-based panels */
1154         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1155                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1156                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1157         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1158                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1159                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1160         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1161                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1162                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
1163
1164         /* Stantum panels */
1165         { .driver_data = MT_CLS_CONFIDENCE,
1166                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
1167                         USB_DEVICE_ID_MTP)},
1168         { .driver_data = MT_CLS_CONFIDENCE,
1169                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1170                         USB_DEVICE_ID_MTP_STM)},
1171         { .driver_data = MT_CLS_ALWAYS_TRUE,
1172                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
1173                         USB_DEVICE_ID_MTP_SITRONIX)},
1174
1175         /* TopSeed panels */
1176         { .driver_data = MT_CLS_TOPSEED,
1177                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1178                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1179
1180         /* Touch International panels */
1181         { .driver_data = MT_CLS_DEFAULT,
1182                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1183                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1184
1185         /* Unitec panels */
1186         { .driver_data = MT_CLS_DEFAULT,
1187                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1188                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1189         { .driver_data = MT_CLS_DEFAULT,
1190                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1191                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1192         /* XAT */
1193         { .driver_data = MT_CLS_DEFAULT,
1194                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1195                         USB_DEVICE_ID_XAT_CSR) },
1196
1197         /* Xiroku */
1198         { .driver_data = MT_CLS_DEFAULT,
1199                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1200                         USB_DEVICE_ID_XIROKU_SPX) },
1201         { .driver_data = MT_CLS_DEFAULT,
1202                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1203                         USB_DEVICE_ID_XIROKU_MPX) },
1204         { .driver_data = MT_CLS_DEFAULT,
1205                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1206                         USB_DEVICE_ID_XIROKU_CSR) },
1207         { .driver_data = MT_CLS_DEFAULT,
1208                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1209                         USB_DEVICE_ID_XIROKU_SPX1) },
1210         { .driver_data = MT_CLS_DEFAULT,
1211                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1212                         USB_DEVICE_ID_XIROKU_MPX1) },
1213         { .driver_data = MT_CLS_DEFAULT,
1214                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1215                         USB_DEVICE_ID_XIROKU_CSR1) },
1216         { .driver_data = MT_CLS_DEFAULT,
1217                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1218                         USB_DEVICE_ID_XIROKU_SPX2) },
1219         { .driver_data = MT_CLS_DEFAULT,
1220                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1221                         USB_DEVICE_ID_XIROKU_MPX2) },
1222         { .driver_data = MT_CLS_DEFAULT,
1223                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1224                         USB_DEVICE_ID_XIROKU_CSR2) },
1225
1226         /* Zytronic panels */
1227         { .driver_data = MT_CLS_SERIAL,
1228                 MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
1229                         USB_DEVICE_ID_ZYTRONIC_ZXY100) },
1230
1231         /* Generic MT device */
1232         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1233         { }
1234 };
1235 MODULE_DEVICE_TABLE(hid, mt_devices);
1236
1237 static const struct hid_usage_id mt_grabbed_usages[] = {
1238         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1239         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1240 };
1241
1242 static struct hid_driver mt_driver = {
1243         .name = "hid-multitouch",
1244         .id_table = mt_devices,
1245         .probe = mt_probe,
1246         .remove = mt_remove,
1247         .input_mapping = mt_input_mapping,
1248         .input_mapped = mt_input_mapped,
1249         .input_configured = mt_input_configured,
1250         .feature_mapping = mt_feature_mapping,
1251         .usage_table = mt_grabbed_usages,
1252         .event = mt_event,
1253         .report = mt_report,
1254 #ifdef CONFIG_PM
1255         .reset_resume = mt_reset_resume,
1256         .resume = mt_resume,
1257 #endif
1258 };
1259
1260 static int __init mt_init(void)
1261 {
1262         return hid_register_driver(&mt_driver);
1263 }
1264
1265 static void __exit mt_exit(void)
1266 {
1267         hid_unregister_driver(&mt_driver);
1268 }
1269
1270 module_init(mt_init);
1271 module_exit(mt_exit);