linux/drivers/hid/hid-multitouch.c
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   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
  38MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  39MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  40MODULE_DESCRIPTION("HID multitouch panels");
  41MODULE_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
  56struct mt_slot {
  57        __s32 x, y, p, w, h;
  58        __s32 contactid;        /* the device ContactID assigned to this slot */
  59        bool touch_state;       /* is the touch valid? */
  60};
  61
  62struct mt_class {
  63        __s32 name;     /* MT_CLS */
  64        __s32 quirks;
  65        __s32 sn_move;  /* Signal/noise ratio for move events */
  66        __s32 sn_width; /* Signal/noise ratio for width events */
  67        __s32 sn_height;        /* Signal/noise ratio for height events */
  68        __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  69        __u8 maxcontacts;
  70        bool is_indirect;       /* true for touchpads */
  71};
  72
  73struct mt_fields {
  74        unsigned usages[HID_MAX_FIELDS];
  75        unsigned int length;
  76};
  77
  78struct mt_device {
  79        struct mt_slot curdata; /* placeholder of incoming data */
  80        struct mt_class mtclass;        /* our mt device class */
  81        struct mt_fields *fields;       /* temporary placeholder for storing the
  82                                           multitouch fields */
  83        unsigned last_field_index;      /* last field index of the report */
  84        unsigned last_slot_field;       /* the last field of a slot */
  85        __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
  86        __s8 inputmode_index;   /* InputMode HID feature index in the report */
  87        __s8 maxcontact_report_id;      /* Maximum Contact Number HID feature,
  88                                   -1 if non-existent */
  89        __u8 num_received;      /* how many contacts we received */
  90        __u8 num_expected;      /* expected last contact index */
  91        __u8 maxcontacts;
  92        __u8 touches_by_report; /* how many touches are present in one report:
  93                                * 1 means we should use a serial protocol
  94                                * > 1 means hybrid (multitouch) protocol */
  95        bool serial_maybe;      /* need to check for serial protocol */
  96        bool curvalid;          /* is the current contact valid? */
  97        unsigned mt_flags;      /* flags to pass to input-mt */
  98};
  99
 100/* classes of device behavior */
 101#define MT_CLS_DEFAULT                          0x0001
 102
 103#define MT_CLS_SERIAL                           0x0002
 104#define MT_CLS_CONFIDENCE                       0x0003
 105#define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 106#define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 107#define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 108#define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 109#define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
 110#define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 111
 112/* vendor specific classes */
 113#define MT_CLS_3M                               0x0101
 114#define MT_CLS_CYPRESS                          0x0102
 115#define MT_CLS_EGALAX                           0x0103
 116#define MT_CLS_EGALAX_SERIAL                    0x0104
 117#define MT_CLS_TOPSEED                          0x0105
 118#define MT_CLS_PANASONIC                        0x0106
 119#define MT_CLS_FLATFROG                         0x0107
 120#define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 121#define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 122
 123#define MT_DEFAULT_MAXCONTACT   10
 124
 125#define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 126#define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 127
 128/*
 129 * these device-dependent functions determine what slot corresponds
 130 * to a valid contact that was just read.
 131 */
 132
 133static int cypress_compute_slot(struct mt_device *td)
 134{
 135        if (td->curdata.contactid != 0 || td->num_received == 0)
 136                return td->curdata.contactid;
 137        else
 138                return -1;
 139}
 140
 141static struct mt_class mt_classes[] = {
 142        { .name = MT_CLS_DEFAULT,
 143                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 144        { .name = MT_CLS_SERIAL,
 145                .quirks = MT_QUIRK_ALWAYS_VALID},
 146        { .name = MT_CLS_CONFIDENCE,
 147                .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 148        { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 149                .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 150                        MT_QUIRK_SLOT_IS_CONTACTID },
 151        { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 152                .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 153                        MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 154        { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 155                .quirks = MT_QUIRK_VALID_IS_INRANGE |
 156                        MT_QUIRK_SLOT_IS_CONTACTID,
 157                .maxcontacts = 2 },
 158        { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 159                .quirks = MT_QUIRK_VALID_IS_INRANGE |
 160                        MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 161                .maxcontacts = 2 },
 162        { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 163                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 164                        MT_QUIRK_SLOT_IS_CONTACTID,
 165                .maxcontacts = 2 },
 166        { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 167                .quirks = MT_QUIRK_VALID_IS_INRANGE |
 168                        MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 169
 170        /*
 171         * vendor specific classes
 172         */
 173        { .name = MT_CLS_3M,
 174                .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 175                        MT_QUIRK_SLOT_IS_CONTACTID,
 176                .sn_move = 2048,
 177                .sn_width = 128,
 178                .sn_height = 128,
 179                .maxcontacts = 60,
 180        },
 181        { .name = MT_CLS_CYPRESS,
 182                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 183                        MT_QUIRK_CYPRESS,
 184                .maxcontacts = 10 },
 185        { .name = MT_CLS_EGALAX,
 186                .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 187                        MT_QUIRK_VALID_IS_INRANGE,
 188                .sn_move = 4096,
 189                .sn_pressure = 32,
 190        },
 191        { .name = MT_CLS_EGALAX_SERIAL,
 192                .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 193                        MT_QUIRK_ALWAYS_VALID,
 194                .sn_move = 4096,
 195                .sn_pressure = 32,
 196        },
 197        { .name = MT_CLS_TOPSEED,
 198                .quirks = MT_QUIRK_ALWAYS_VALID,
 199                .is_indirect = true,
 200                .maxcontacts = 2,
 201        },
 202        { .name = MT_CLS_PANASONIC,
 203                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 204                .maxcontacts = 4 },
 205        { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 206                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 207                        MT_QUIRK_VALID_IS_INRANGE |
 208                        MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 209                .maxcontacts = 2
 210        },
 211        { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 212                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 213                        MT_QUIRK_SLOT_IS_CONTACTNUMBER
 214        },
 215
 216        { .name = MT_CLS_FLATFROG,
 217                .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 218                        MT_QUIRK_NO_AREA,
 219                .sn_move = 2048,
 220                .maxcontacts = 40,
 221        },
 222        { }
 223};
 224
 225static ssize_t mt_show_quirks(struct device *dev,
 226                           struct device_attribute *attr,
 227                           char *buf)
 228{
 229        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 230        struct mt_device *td = hid_get_drvdata(hdev);
 231
 232        return sprintf(buf, "%u\n", td->mtclass.quirks);
 233}
 234
 235static ssize_t mt_set_quirks(struct device *dev,
 236                          struct device_attribute *attr,
 237                          const char *buf, size_t count)
 238{
 239        struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 240        struct mt_device *td = hid_get_drvdata(hdev);
 241
 242        unsigned long val;
 243
 244        if (kstrtoul(buf, 0, &val))
 245                return -EINVAL;
 246
 247        td->mtclass.quirks = val;
 248
 249        return count;
 250}
 251
 252static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 253
 254static struct attribute *sysfs_attrs[] = {
 255        &dev_attr_quirks.attr,
 256        NULL
 257};
 258
 259static struct attribute_group mt_attribute_group = {
 260        .attrs = sysfs_attrs
 261};
 262
 263static void mt_feature_mapping(struct hid_device *hdev,
 264                struct hid_field *field, struct hid_usage *usage)
 265{
 266        struct mt_device *td = hid_get_drvdata(hdev);
 267        int i;
 268
 269        switch (usage->hid) {
 270        case HID_DG_INPUTMODE:
 271                td->inputmode = field->report->id;
 272                td->inputmode_index = 0; /* has to be updated below */
 273
 274                for (i=0; i < field->maxusage; i++) {
 275                        if (field->usage[i].hid == usage->hid) {
 276                                td->inputmode_index = i;
 277                                break;
 278                        }
 279                }
 280
 281                break;
 282        case HID_DG_CONTACTMAX:
 283                td->maxcontact_report_id = field->report->id;
 284                td->maxcontacts = field->value[0];
 285                if (td->mtclass.maxcontacts)
 286                        /* check if the maxcontacts is given by the class */
 287                        td->maxcontacts = td->mtclass.maxcontacts;
 288
 289                break;
 290        }
 291}
 292
 293static void set_abs(struct input_dev *input, unsigned int code,
 294                struct hid_field *field, int snratio)
 295{
 296        int fmin = field->logical_minimum;
 297        int fmax = field->logical_maximum;
 298        int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 299        input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 300}
 301
 302static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 303                struct hid_input *hi)
 304{
 305        struct mt_fields *f = td->fields;
 306
 307        if (f->length >= HID_MAX_FIELDS)
 308                return;
 309
 310        f->usages[f->length++] = usage->hid;
 311}
 312
 313static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 314                struct hid_field *field, struct hid_usage *usage,
 315                unsigned long **bit, int *max)
 316{
 317        struct mt_device *td = hid_get_drvdata(hdev);
 318        struct mt_class *cls = &td->mtclass;
 319        int code;
 320
 321        /* Only map fields from TouchScreen or TouchPad collections.
 322        * We need to ignore fields that belong to other collections
 323        * such as Mouse that might have the same GenericDesktop usages. */
 324        if (field->application == HID_DG_TOUCHSCREEN)
 325                td->mt_flags |= INPUT_MT_DIRECT;
 326        else if (field->application != HID_DG_TOUCHPAD)
 327                return 0;
 328
 329        /*
 330         * Model touchscreens providing buttons as touchpads.
 331         */
 332        if (field->application == HID_DG_TOUCHPAD ||
 333            (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 334                td->mt_flags |= INPUT_MT_POINTER;
 335
 336        /* eGalax devices provide a Digitizer.Stylus input which overrides
 337         * the correct Digitizers.Finger X/Y ranges.
 338         * Let's just ignore this input. */
 339        if (field->physical == HID_DG_STYLUS)
 340                return -1;
 341
 342        switch (usage->hid & HID_USAGE_PAGE) {
 343
 344        case HID_UP_GENDESK:
 345                switch (usage->hid) {
 346                case HID_GD_X:
 347                        hid_map_usage(hi, usage, bit, max,
 348                                        EV_ABS, ABS_MT_POSITION_X);
 349                        set_abs(hi->input, ABS_MT_POSITION_X, field,
 350                                cls->sn_move);
 351                        mt_store_field(usage, td, hi);
 352                        td->last_field_index = field->index;
 353                        return 1;
 354                case HID_GD_Y:
 355                        hid_map_usage(hi, usage, bit, max,
 356                                        EV_ABS, ABS_MT_POSITION_Y);
 357                        set_abs(hi->input, ABS_MT_POSITION_Y, field,
 358                                cls->sn_move);
 359                        mt_store_field(usage, td, hi);
 360                        td->last_field_index = field->index;
 361                        return 1;
 362                }
 363                return 0;
 364
 365        case HID_UP_DIGITIZER:
 366                switch (usage->hid) {
 367                case HID_DG_INRANGE:
 368                        mt_store_field(usage, td, hi);
 369                        td->last_field_index = field->index;
 370                        return 1;
 371                case HID_DG_CONFIDENCE:
 372                        mt_store_field(usage, td, hi);
 373                        td->last_field_index = field->index;
 374                        return 1;
 375                case HID_DG_TIPSWITCH:
 376                        hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 377                        input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 378                        mt_store_field(usage, td, hi);
 379                        td->last_field_index = field->index;
 380                        return 1;
 381                case HID_DG_CONTACTID:
 382                        mt_store_field(usage, td, hi);
 383                        td->last_field_index = field->index;
 384                        td->touches_by_report++;
 385                        return 1;
 386                case HID_DG_WIDTH:
 387                        hid_map_usage(hi, usage, bit, max,
 388                                        EV_ABS, ABS_MT_TOUCH_MAJOR);
 389                        if (!(cls->quirks & MT_QUIRK_NO_AREA))
 390                                set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 391                                        cls->sn_width);
 392                        mt_store_field(usage, td, hi);
 393                        td->last_field_index = field->index;
 394                        return 1;
 395                case HID_DG_HEIGHT:
 396                        hid_map_usage(hi, usage, bit, max,
 397                                        EV_ABS, ABS_MT_TOUCH_MINOR);
 398                        if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 399                                set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 400                                        cls->sn_height);
 401                                input_set_abs_params(hi->input,
 402                                        ABS_MT_ORIENTATION, 0, 1, 0, 0);
 403                        }
 404                        mt_store_field(usage, td, hi);
 405                        td->last_field_index = field->index;
 406                        return 1;
 407                case HID_DG_TIPPRESSURE:
 408                        hid_map_usage(hi, usage, bit, max,
 409                                        EV_ABS, ABS_MT_PRESSURE);
 410                        set_abs(hi->input, ABS_MT_PRESSURE, field,
 411                                cls->sn_pressure);
 412                        mt_store_field(usage, td, hi);
 413                        td->last_field_index = field->index;
 414                        return 1;
 415                case HID_DG_CONTACTCOUNT:
 416                        td->last_field_index = field->index;
 417                        return 1;
 418                case HID_DG_CONTACTMAX:
 419                        /* we don't set td->last_slot_field as contactcount and
 420                         * contact max are global to the report */
 421                        td->last_field_index = field->index;
 422                        return -1;
 423                case HID_DG_TOUCH:
 424                        /* Legacy devices use TIPSWITCH and not TOUCH.
 425                         * Let's just ignore this field. */
 426                        return -1;
 427                }
 428                /* let hid-input decide for the others */
 429                return 0;
 430
 431        case HID_UP_BUTTON:
 432                code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 433                hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 434                input_set_capability(hi->input, EV_KEY, code);
 435                return 1;
 436
 437        case 0xff000000:
 438                /* we do not want to map these: no input-oriented meaning */
 439                return -1;
 440        }
 441
 442        return 0;
 443}
 444
 445static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 446                struct hid_field *field, struct hid_usage *usage,
 447                unsigned long **bit, int *max)
 448{
 449        if (usage->type == EV_KEY || usage->type == EV_ABS)
 450                set_bit(usage->type, hi->input->evbit);
 451
 452        return -1;
 453}
 454
 455static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 456{
 457        __s32 quirks = td->mtclass.quirks;
 458
 459        if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 460                return td->curdata.contactid;
 461
 462        if (quirks & MT_QUIRK_CYPRESS)
 463                return cypress_compute_slot(td);
 464
 465        if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 466                return td->num_received;
 467
 468        if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 469                return td->curdata.contactid - 1;
 470
 471        return input_mt_get_slot_by_key(input, td->curdata.contactid);
 472}
 473
 474/*
 475 * this function is called when a whole contact has been processed,
 476 * so that it can assign it to a slot and store the data there
 477 */
 478static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 479{
 480        if (td->curvalid) {
 481                int slotnum = mt_compute_slot(td, input);
 482                struct mt_slot *s = &td->curdata;
 483
 484                if (slotnum < 0 || slotnum >= td->maxcontacts)
 485                        return;
 486
 487                input_mt_slot(input, slotnum);
 488                input_mt_report_slot_state(input, MT_TOOL_FINGER,
 489                        s->touch_state);
 490                if (s->touch_state) {
 491                        /* this finger is on the screen */
 492                        int wide = (s->w > s->h);
 493                        /* divided by two to match visual scale of touch */
 494                        int major = max(s->w, s->h) >> 1;
 495                        int minor = min(s->w, s->h) >> 1;
 496
 497                        input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 498                        input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 499                        input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 500                        input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 501                        input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 502                        input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 503                }
 504        }
 505
 506        td->num_received++;
 507}
 508
 509/*
 510 * this function is called when a whole packet has been received and processed,
 511 * so that it can decide what to send to the input layer.
 512 */
 513static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 514{
 515        input_mt_sync_frame(input);
 516        input_sync(input);
 517        td->num_received = 0;
 518}
 519
 520static int mt_event(struct hid_device *hid, struct hid_field *field,
 521                                struct hid_usage *usage, __s32 value)
 522{
 523        struct mt_device *td = hid_get_drvdata(hid);
 524        __s32 quirks = td->mtclass.quirks;
 525
 526        if (hid->claimed & HID_CLAIMED_INPUT) {
 527                switch (usage->hid) {
 528                case HID_DG_INRANGE:
 529                        if (quirks & MT_QUIRK_ALWAYS_VALID)
 530                                td->curvalid = true;
 531                        else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 532                                td->curvalid = value;
 533                        break;
 534                case HID_DG_TIPSWITCH:
 535                        if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 536                                td->curvalid = value;
 537                        td->curdata.touch_state = value;
 538                        break;
 539                case HID_DG_CONFIDENCE:
 540                        if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 541                                td->curvalid = value;
 542                        break;
 543                case HID_DG_CONTACTID:
 544                        td->curdata.contactid = value;
 545                        break;
 546                case HID_DG_TIPPRESSURE:
 547                        td->curdata.p = value;
 548                        break;
 549                case HID_GD_X:
 550                        td->curdata.x = value;
 551                        break;
 552                case HID_GD_Y:
 553                        td->curdata.y = value;
 554                        break;
 555                case HID_DG_WIDTH:
 556                        td->curdata.w = value;
 557                        break;
 558                case HID_DG_HEIGHT:
 559                        td->curdata.h = value;
 560                        break;
 561                case HID_DG_CONTACTCOUNT:
 562                        /*
 563                         * Includes multi-packet support where subsequent
 564                         * packets are sent with zero contactcount.
 565                         */
 566                        if (value)
 567                                td->num_expected = value;
 568                        break;
 569                case HID_DG_TOUCH:
 570                        /* do nothing */
 571                        break;
 572
 573                default:
 574                        /* fallback to the generic hidinput handling */
 575                        return 0;
 576                }
 577
 578                if (usage->hid == td->last_slot_field)
 579                        mt_complete_slot(td, field->hidinput->input);
 580
 581                if (field->index == td->last_field_index
 582                        && td->num_received >= td->num_expected)
 583                        mt_sync_frame(td, field->hidinput->input);
 584
 585        }
 586
 587        /* we have handled the hidinput part, now remains hiddev */
 588        if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 589                hid->hiddev_hid_event(hid, field, usage, value);
 590
 591        return 1;
 592}
 593
 594static void mt_set_input_mode(struct hid_device *hdev)
 595{
 596        struct mt_device *td = hid_get_drvdata(hdev);
 597        struct hid_report *r;
 598        struct hid_report_enum *re;
 599
 600        if (td->inputmode < 0)
 601                return;
 602
 603        re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 604        r = re->report_id_hash[td->inputmode];
 605        if (r) {
 606                r->field[0]->value[td->inputmode_index] = 0x02;
 607                usbhid_submit_report(hdev, r, USB_DIR_OUT);
 608        }
 609}
 610
 611static void mt_set_maxcontacts(struct hid_device *hdev)
 612{
 613        struct mt_device *td = hid_get_drvdata(hdev);
 614        struct hid_report *r;
 615        struct hid_report_enum *re;
 616        int fieldmax, max;
 617
 618        if (td->maxcontact_report_id < 0)
 619                return;
 620
 621        if (!td->mtclass.maxcontacts)
 622                return;
 623
 624        re = &hdev->report_enum[HID_FEATURE_REPORT];
 625        r = re->report_id_hash[td->maxcontact_report_id];
 626        if (r) {
 627                max = td->mtclass.maxcontacts;
 628                fieldmax = r->field[0]->logical_maximum;
 629                max = min(fieldmax, max);
 630                if (r->field[0]->value[0] != max) {
 631                        r->field[0]->value[0] = max;
 632                        usbhid_submit_report(hdev, r, USB_DIR_OUT);
 633                }
 634        }
 635}
 636
 637static void mt_post_parse_default_settings(struct mt_device *td)
 638{
 639        __s32 quirks = td->mtclass.quirks;
 640
 641        /* unknown serial device needs special quirks */
 642        if (td->touches_by_report == 1) {
 643                quirks |= MT_QUIRK_ALWAYS_VALID;
 644                quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 645                quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 646                quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 647        }
 648
 649        td->mtclass.quirks = quirks;
 650}
 651
 652static void mt_post_parse(struct mt_device *td)
 653{
 654        struct mt_fields *f = td->fields;
 655
 656        if (td->touches_by_report > 0) {
 657                int field_count_per_touch = f->length / td->touches_by_report;
 658                td->last_slot_field = f->usages[field_count_per_touch - 1];
 659        }
 660}
 661
 662static void mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 663
 664{
 665        struct mt_device *td = hid_get_drvdata(hdev);
 666        struct mt_class *cls = &td->mtclass;
 667        struct input_dev *input = hi->input;
 668
 669        /* Only initialize slots for MT input devices */
 670        if (!test_bit(ABS_MT_POSITION_X, input->absbit))
 671                return;
 672
 673        if (!td->maxcontacts)
 674                td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 675
 676        mt_post_parse(td);
 677        if (td->serial_maybe)
 678                mt_post_parse_default_settings(td);
 679
 680        if (cls->is_indirect)
 681                td->mt_flags |= INPUT_MT_POINTER;
 682
 683        if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 684                td->mt_flags |= INPUT_MT_DROP_UNUSED;
 685
 686        input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 687
 688        td->mt_flags = 0;
 689}
 690
 691static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 692{
 693        int ret, i;
 694        struct mt_device *td;
 695        struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 696
 697        for (i = 0; mt_classes[i].name ; i++) {
 698                if (id->driver_data == mt_classes[i].name) {
 699                        mtclass = &(mt_classes[i]);
 700                        break;
 701                }
 702        }
 703
 704        /* This allows the driver to correctly support devices
 705         * that emit events over several HID messages.
 706         */
 707        hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 708
 709        td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 710        if (!td) {
 711                dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 712                return -ENOMEM;
 713        }
 714        td->mtclass = *mtclass;
 715        td->inputmode = -1;
 716        td->maxcontact_report_id = -1;
 717        hid_set_drvdata(hdev, td);
 718
 719        td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
 720        if (!td->fields) {
 721                dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
 722                ret = -ENOMEM;
 723                goto fail;
 724        }
 725
 726        if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
 727                td->serial_maybe = true;
 728
 729        ret = hid_parse(hdev);
 730        if (ret != 0)
 731                goto fail;
 732
 733        ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 734        if (ret)
 735                goto fail;
 736
 737        ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 738
 739        mt_set_maxcontacts(hdev);
 740        mt_set_input_mode(hdev);
 741
 742        kfree(td->fields);
 743        td->fields = NULL;
 744
 745        return 0;
 746
 747fail:
 748        kfree(td->fields);
 749        kfree(td);
 750        return ret;
 751}
 752
 753#ifdef CONFIG_PM
 754static int mt_reset_resume(struct hid_device *hdev)
 755{
 756        mt_set_maxcontacts(hdev);
 757        mt_set_input_mode(hdev);
 758        return 0;
 759}
 760
 761static int mt_resume(struct hid_device *hdev)
 762{
 763        struct usb_interface *intf;
 764        struct usb_host_interface *interface;
 765        struct usb_device *dev;
 766
 767        if (hdev->bus != BUS_USB)
 768                return 0;
 769
 770        intf = to_usb_interface(hdev->dev.parent);
 771        interface = intf->cur_altsetting;
 772        dev = hid_to_usb_dev(hdev);
 773
 774        /* Some Elan legacy devices require SET_IDLE to be set on resume.
 775         * It should be safe to send it to other devices too.
 776         * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
 777
 778        usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 779                        HID_REQ_SET_IDLE,
 780                        USB_TYPE_CLASS | USB_RECIP_INTERFACE,
 781                        0, interface->desc.bInterfaceNumber,
 782                        NULL, 0, USB_CTRL_SET_TIMEOUT);
 783
 784        return 0;
 785}
 786#endif
 787
 788static void mt_remove(struct hid_device *hdev)
 789{
 790        struct mt_device *td = hid_get_drvdata(hdev);
 791        sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
 792        hid_hw_stop(hdev);
 793        kfree(td);
 794        hid_set_drvdata(hdev, NULL);
 795}
 796
 797static const struct hid_device_id mt_devices[] = {
 798
 799        /* 3M panels */
 800        { .driver_data = MT_CLS_3M,
 801                MT_USB_DEVICE(USB_VENDOR_ID_3M,
 802                        USB_DEVICE_ID_3M1968) },
 803        { .driver_data = MT_CLS_3M,
 804                MT_USB_DEVICE(USB_VENDOR_ID_3M,
 805                        USB_DEVICE_ID_3M2256) },
 806        { .driver_data = MT_CLS_3M,
 807                MT_USB_DEVICE(USB_VENDOR_ID_3M,
 808                        USB_DEVICE_ID_3M3266) },
 809
 810        /* ActionStar panels */
 811        { .driver_data = MT_CLS_DEFAULT,
 812                MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
 813                        USB_DEVICE_ID_ACTIONSTAR_1011) },
 814
 815        /* Atmel panels */
 816        { .driver_data = MT_CLS_SERIAL,
 817                MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 818                        USB_DEVICE_ID_ATMEL_MULTITOUCH) },
 819        { .driver_data = MT_CLS_SERIAL,
 820                MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
 821                        USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
 822
 823        /* Baanto multitouch devices */
 824        { .driver_data = MT_CLS_DEFAULT,
 825                MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
 826                        USB_DEVICE_ID_BAANTO_MT_190W2) },
 827        /* Cando panels */
 828        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 829                MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 830                        USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
 831        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 832                MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 833                        USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
 834        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 835                MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 836                        USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
 837        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 838                MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
 839                        USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
 840
 841        /* Chunghwa Telecom touch panels */
 842        {  .driver_data = MT_CLS_DEFAULT,
 843                MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 844                        USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 845
 846        /* CVTouch panels */
 847        { .driver_data = MT_CLS_DEFAULT,
 848                MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 849                        USB_DEVICE_ID_CVTOUCH_SCREEN) },
 850
 851        /* Cypress panel */
 852        { .driver_data = MT_CLS_CYPRESS,
 853                HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
 854                        USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
 855
 856        /* eGalax devices (resistive) */
 857        { .driver_data = MT_CLS_EGALAX,
 858                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 859                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
 860        { .driver_data = MT_CLS_EGALAX,
 861                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 862                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
 863
 864        /* eGalax devices (capacitive) */
 865        { .driver_data = MT_CLS_EGALAX,
 866                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 867                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
 868        { .driver_data = MT_CLS_EGALAX_SERIAL,
 869                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 870                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
 871        { .driver_data = MT_CLS_EGALAX_SERIAL,
 872                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 873                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
 874        { .driver_data = MT_CLS_EGALAX_SERIAL,
 875                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 876                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
 877        { .driver_data = MT_CLS_EGALAX_SERIAL,
 878                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 879                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
 880        { .driver_data = MT_CLS_EGALAX,
 881                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 882                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
 883        { .driver_data = MT_CLS_EGALAX_SERIAL,
 884                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 885                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
 886        { .driver_data = MT_CLS_EGALAX,
 887                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 888                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
 889        { .driver_data = MT_CLS_EGALAX_SERIAL,
 890                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 891                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
 892        { .driver_data = MT_CLS_EGALAX,
 893                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 894                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
 895        { .driver_data = MT_CLS_EGALAX,
 896                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 897                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
 898        { .driver_data = MT_CLS_EGALAX_SERIAL,
 899                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 900                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
 901        { .driver_data = MT_CLS_EGALAX_SERIAL,
 902                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 903                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
 904        { .driver_data = MT_CLS_EGALAX_SERIAL,
 905                MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
 906                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
 907        { .driver_data = MT_CLS_EGALAX,
 908                HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 909                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
 910        { .driver_data = MT_CLS_EGALAX,
 911                HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 912                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
 913        { .driver_data = MT_CLS_EGALAX,
 914                HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 915                        USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
 916
 917        /* Elo TouchSystems IntelliTouch Plus panel */
 918        { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
 919                MT_USB_DEVICE(USB_VENDOR_ID_ELO,
 920                        USB_DEVICE_ID_ELO_TS2515) },
 921
 922        /* Flatfrog Panels */
 923        { .driver_data = MT_CLS_FLATFROG,
 924                MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
 925                        USB_DEVICE_ID_MULTITOUCH_3200) },
 926
 927        /* GeneralTouch panel */
 928        { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
 929                MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
 930                        USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
 931        { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 932                MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
 933                        USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
 934
 935        /* Gametel game controller */
 936        { .driver_data = MT_CLS_DEFAULT,
 937                MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
 938                        USB_DEVICE_ID_GAMETEL_MT_MODE) },
 939
 940        /* GoodTouch panels */
 941        { .driver_data = MT_CLS_DEFAULT,
 942                MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
 943                        USB_DEVICE_ID_GOODTOUCH_000f) },
 944
 945        /* Hanvon panels */
 946        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 947                MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
 948                        USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
 949
 950        /* Ideacom panel */
 951        { .driver_data = MT_CLS_SERIAL,
 952                MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 953                        USB_DEVICE_ID_IDEACOM_IDC6650) },
 954        { .driver_data = MT_CLS_SERIAL,
 955                MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 956                        USB_DEVICE_ID_IDEACOM_IDC6651) },
 957
 958        /* Ilitek dual touch panel */
 959        {  .driver_data = MT_CLS_DEFAULT,
 960                MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 961                        USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 962
 963        /* IRTOUCH panels */
 964        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 965                MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
 966                        USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
 967
 968        /* LG Display panels */
 969        { .driver_data = MT_CLS_DEFAULT,
 970                MT_USB_DEVICE(USB_VENDOR_ID_LG,
 971                        USB_DEVICE_ID_LG_MULTITOUCH) },
 972
 973        /* Lumio panels */
 974        { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 975                MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 976                        USB_DEVICE_ID_CRYSTALTOUCH) },
 977        { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 978                MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 979                        USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
 980
 981        /* MosArt panels */
 982        { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 983                MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 984                        USB_DEVICE_ID_ASUS_T91MT)},
 985        { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 986                MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
 987                        USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
 988        { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 989                MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
 990                        USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
 991
 992        /* Panasonic panels */
 993        { .driver_data = MT_CLS_PANASONIC,
 994                MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 995                        USB_DEVICE_ID_PANABOARD_UBT780) },
 996        { .driver_data = MT_CLS_PANASONIC,
 997                MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
 998                        USB_DEVICE_ID_PANABOARD_UBT880) },
 999
1000        /* Novatek Panel */
1001        { .driver_data = MT_CLS_DEFAULT,
1002                MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1003                        USB_DEVICE_ID_NOVATEK_PCT) },
1004
1005        /* PenMount panels */
1006        { .driver_data = MT_CLS_CONFIDENCE,
1007                MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
1008                        USB_DEVICE_ID_PENMOUNT_PCI) },
1009
1010        /* PixArt optical touch screen */
1011        { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1012                MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1013                        USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1014        { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1015                MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1016                        USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1017        { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1018                MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1019                        USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1020
1021        /* PixCir-based panels */
1022        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1023                MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
1024                        USB_DEVICE_ID_HANVON_MULTITOUCH) },
1025        { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1026                MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1027                        USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1028
1029        /* Quanta-based panels */
1030        { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1031                MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1032                        USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1033        { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1034                MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1035                        USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1036        { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1037                MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1038                        USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
1039
1040        /* Stantum panels */
1041        { .driver_data = MT_CLS_CONFIDENCE,
1042                MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
1043                        USB_DEVICE_ID_MTP)},
1044        { .driver_data = MT_CLS_CONFIDENCE,
1045                MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1046                        USB_DEVICE_ID_MTP_STM)},
1047        { .driver_data = MT_CLS_CONFIDENCE,
1048                MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
1049                        USB_DEVICE_ID_MTP_SITRONIX)},
1050
1051        /* TopSeed panels */
1052        { .driver_data = MT_CLS_TOPSEED,
1053                MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1054                        USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1055
1056        /* Touch International panels */
1057        { .driver_data = MT_CLS_DEFAULT,
1058                MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1059                        USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1060
1061        /* Unitec panels */
1062        { .driver_data = MT_CLS_DEFAULT,
1063                MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1064                        USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1065        { .driver_data = MT_CLS_DEFAULT,
1066                MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1067                        USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1068        /* XAT */
1069        { .driver_data = MT_CLS_DEFAULT,
1070                MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1071                        USB_DEVICE_ID_XAT_CSR) },
1072
1073        /* Xiroku */
1074        { .driver_data = MT_CLS_DEFAULT,
1075                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1076                        USB_DEVICE_ID_XIROKU_SPX) },
1077        { .driver_data = MT_CLS_DEFAULT,
1078                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1079                        USB_DEVICE_ID_XIROKU_MPX) },
1080        { .driver_data = MT_CLS_DEFAULT,
1081                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1082                        USB_DEVICE_ID_XIROKU_CSR) },
1083        { .driver_data = MT_CLS_DEFAULT,
1084                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1085                        USB_DEVICE_ID_XIROKU_SPX1) },
1086        { .driver_data = MT_CLS_DEFAULT,
1087                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1088                        USB_DEVICE_ID_XIROKU_MPX1) },
1089        { .driver_data = MT_CLS_DEFAULT,
1090                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1091                        USB_DEVICE_ID_XIROKU_CSR1) },
1092        { .driver_data = MT_CLS_DEFAULT,
1093                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1094                        USB_DEVICE_ID_XIROKU_SPX2) },
1095        { .driver_data = MT_CLS_DEFAULT,
1096                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1097                        USB_DEVICE_ID_XIROKU_MPX2) },
1098        { .driver_data = MT_CLS_DEFAULT,
1099                MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1100                        USB_DEVICE_ID_XIROKU_CSR2) },
1101
1102        /* Zytronic panels */
1103        { .driver_data = MT_CLS_SERIAL,
1104                MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
1105                        USB_DEVICE_ID_ZYTRONIC_ZXY100) },
1106
1107        /* Generic MT device */
1108        { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1109        { }
1110};
1111MODULE_DEVICE_TABLE(hid, mt_devices);
1112
1113static const struct hid_usage_id mt_grabbed_usages[] = {
1114        { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1115        { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1116};
1117
1118static struct hid_driver mt_driver = {
1119        .name = "hid-multitouch",
1120        .id_table = mt_devices,
1121        .probe = mt_probe,
1122        .remove = mt_remove,
1123        .input_mapping = mt_input_mapping,
1124        .input_mapped = mt_input_mapped,
1125        .input_configured = mt_input_configured,
1126        .feature_mapping = mt_feature_mapping,
1127        .usage_table = mt_grabbed_usages,
1128        .event = mt_event,
1129#ifdef CONFIG_PM
1130        .reset_resume = mt_reset_resume,
1131        .resume = mt_resume,
1132#endif
1133};
1134
1135static int __init mt_init(void)
1136{
1137        return hid_register_driver(&mt_driver);
1138}
1139
1140static void __exit mt_exit(void)
1141{
1142        hid_unregister_driver(&mt_driver);
1143}
1144
1145module_init(mt_init);
1146module_exit(mt_exit);
1147
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