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) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   6  *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
   7  *  Copyright (c) 2012-2013 Red Hat, Inc
   8  *
   9  *  This code is partly based on hid-egalax.c:
  10  *
  11  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  12  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  13  *  Copyright (c) 2010 Canonical, Ltd.
  14  *
  15  *  This code is partly based on hid-3m-pct.c:
  16  *
  17  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  18  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  19  *  Copyright (c) 2010      Canonical, Ltd.
  20  *
  21  */
  22
  23 /*
  24  * This program is free software; you can redistribute it and/or modify it
  25  * under the terms of the GNU General Public License as published by the Free
  26  * Software Foundation; either version 2 of the License, or (at your option)
  27  * any later version.
  28  */
  29
  30 /*
  31  * This driver is regularly tested thanks to the tool hid-test[1].
  32  * This tool relies on hid-replay[2] and a database of hid devices[3].
  33  * Please run these regression tests before patching this module so that
  34  * your patch won't break existing known devices.
  35  *
  36  * [1] https://github.com/bentiss/hid-test
  37  * [2] https://github.com/bentiss/hid-replay
  38  * [3] https://github.com/bentiss/hid-devices
  39  */
  40
  41 #include <linux/device.h>
  42 #include <linux/hid.h>
  43 #include <linux/module.h>
  44 #include <linux/slab.h>
  45 #include <linux/usb.h>
  46 #include <linux/input/mt.h>
  47 #include <linux/string.h>
  48
  49
  50 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  51 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  52 MODULE_DESCRIPTION("HID multitouch panels");
  53 MODULE_LICENSE("GPL");
  54
  55 #include "hid-ids.h"
  56
  57 /* quirks to control the device */
  58 #define MT_QUIRK_NOT_SEEN_MEANS_UP      (1 << 0)
  59 #define MT_QUIRK_SLOT_IS_CONTACTID      (1 << 1)
  60 #define MT_QUIRK_CYPRESS                (1 << 2)
  61 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  (1 << 3)
  62 #define MT_QUIRK_ALWAYS_VALID           (1 << 4)
  63 #define MT_QUIRK_VALID_IS_INRANGE       (1 << 5)
  64 #define MT_QUIRK_VALID_IS_CONFIDENCE    (1 << 6)
  65 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    (1 << 8)
  66 #define MT_QUIRK_NO_AREA                (1 << 9)
  67 #define MT_QUIRK_IGNORE_DUPLICATES      (1 << 10)
  68 #define MT_QUIRK_HOVERING               (1 << 11)
  69 #define MT_QUIRK_CONTACT_CNT_ACCURATE   (1 << 12)
  70
  71 struct mt_slot {
  72         __s32 x, y, cx, cy, p, w, h;
  73         __s32 contactid;        /* the device ContactID assigned to this slot */
  74         bool touch_state;       /* is the touch valid? */
  75         bool inrange_state;     /* is the finger in proximity of the sensor? */
  76 };
  77
  78 struct mt_class {
  79         __s32 name;     /* MT_CLS */
  80         __s32 quirks;
  81         __s32 sn_move;  /* Signal/noise ratio for move events */
  82         __s32 sn_width; /* Signal/noise ratio for width events */
  83         __s32 sn_height;        /* Signal/noise ratio for height events */
  84         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  85         __u8 maxcontacts;
  86         bool is_indirect;       /* true for touchpads */
  87 };
  88
  89 struct mt_fields {
  90         unsigned usages[HID_MAX_FIELDS];
  91         unsigned int length;
  92 };
  93
  94 struct mt_device {
  95         struct mt_slot curdata; /* placeholder of incoming data */
  96         struct mt_class mtclass;        /* our mt device class */
  97         struct mt_fields *fields;       /* temporary placeholder for storing the
  98                                            multitouch fields */
  99         int cc_index;   /* contact count field index in the report */
 100         int cc_value_index;     /* contact count value index in the field */
 101         unsigned last_slot_field;       /* the last field of a slot */
 102         unsigned mt_report_id;  /* the report ID of the multitouch device */
 103         unsigned pen_report_id; /* the report ID of the pen device */
 104         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
 105         __s16 inputmode_index;  /* InputMode HID feature index in the report */
 106         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
 107                                    -1 if non-existent */
 108         __u8 num_received;      /* how many contacts we received */
 109         __u8 num_expected;      /* expected last contact index */
 110         __u8 maxcontacts;
 111         __u8 touches_by_report; /* how many touches are present in one report:
 112                                 * 1 means we should use a serial protocol
 113                                 * > 1 means hybrid (multitouch) protocol */
 114         bool serial_maybe;      /* need to check for serial protocol */
 115         bool curvalid;          /* is the current contact valid? */
 116         unsigned mt_flags;      /* flags to pass to input-mt */
 117 };
 118
 119 static void mt_post_parse_default_settings(struct mt_device *td);
 120 static void mt_post_parse(struct mt_device *td);
 121
 122 /* classes of device behavior */
 123 #define MT_CLS_DEFAULT                          0x0001
 124
 125 #define MT_CLS_SERIAL                           0x0002
 126 #define MT_CLS_CONFIDENCE                       0x0003
 127 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 128 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 129 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 130 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 131 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
 132 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 133 #define MT_CLS_NSMU                             0x000a
 134 #define MT_CLS_DUAL_CONTACT_NUMBER              0x0010
 135 #define MT_CLS_DUAL_CONTACT_ID                  0x0011
 136
 137 /* vendor specific classes */
 138 #define MT_CLS_3M                               0x0101
 139 #define MT_CLS_CYPRESS                          0x0102
 140 #define MT_CLS_EGALAX                           0x0103
 141 #define MT_CLS_EGALAX_SERIAL                    0x0104
 142 #define MT_CLS_TOPSEED                          0x0105
 143 #define MT_CLS_PANASONIC                        0x0106
 144 #define MT_CLS_FLATFROG                         0x0107
 145 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 146 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 147
 148 #define MT_DEFAULT_MAXCONTACT   10
 149 #define MT_MAX_MAXCONTACT       250
 150
 151 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 152 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 153
 154 /*
 155  * these device-dependent functions determine what slot corresponds
 156  * to a valid contact that was just read.
 157  */
 158
 159 static int cypress_compute_slot(struct mt_device *td)
 160 {
 161         if (td->curdata.contactid != 0 || td->num_received == 0)
 162                 return td->curdata.contactid;
 163         else
 164                 return -1;
 165 }
 166
 167 static struct mt_class mt_classes[] = {
 168         { .name = MT_CLS_DEFAULT,
 169                 .quirks = MT_QUIRK_ALWAYS_VALID |
 170                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 171         { .name = MT_CLS_NSMU,
 172                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 173         { .name = MT_CLS_SERIAL,
 174                 .quirks = MT_QUIRK_ALWAYS_VALID},
 175         { .name = MT_CLS_CONFIDENCE,
 176                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 177         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 178                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 179                         MT_QUIRK_SLOT_IS_CONTACTID },
 180         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 181                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 182                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 183         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 184                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 185                         MT_QUIRK_SLOT_IS_CONTACTID,
 186                 .maxcontacts = 2 },
 187         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 188                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 189                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 190                 .maxcontacts = 2 },
 191         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 192                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 193                         MT_QUIRK_SLOT_IS_CONTACTID,
 194                 .maxcontacts = 2 },
 195         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 196                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 197                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 198         { .name = MT_CLS_DUAL_CONTACT_NUMBER,
 199                 .quirks = MT_QUIRK_ALWAYS_VALID |
 200                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 201                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 202                 .maxcontacts = 2 },
 203         { .name = MT_CLS_DUAL_CONTACT_ID,
 204                 .quirks = MT_QUIRK_ALWAYS_VALID |
 205                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 206                         MT_QUIRK_SLOT_IS_CONTACTID,
 207                 .maxcontacts = 2 },
 208
 209         /*
 210          * vendor specific classes
 211          */
 212         { .name = MT_CLS_3M,
 213                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 214                         MT_QUIRK_SLOT_IS_CONTACTID,
 215                 .sn_move = 2048,
 216                 .sn_width = 128,
 217                 .sn_height = 128,
 218                 .maxcontacts = 60,
 219         },
 220         { .name = MT_CLS_CYPRESS,
 221                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 222                         MT_QUIRK_CYPRESS,
 223                 .maxcontacts = 10 },
 224         { .name = MT_CLS_EGALAX,
 225                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 226                         MT_QUIRK_VALID_IS_INRANGE,
 227                 .sn_move = 4096,
 228                 .sn_pressure = 32,
 229         },
 230         { .name = MT_CLS_EGALAX_SERIAL,
 231                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 232                         MT_QUIRK_ALWAYS_VALID,
 233                 .sn_move = 4096,
 234                 .sn_pressure = 32,
 235         },
 236         { .name = MT_CLS_TOPSEED,
 237                 .quirks = MT_QUIRK_ALWAYS_VALID,
 238                 .is_indirect = true,
 239                 .maxcontacts = 2,
 240         },
 241         { .name = MT_CLS_PANASONIC,
 242                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 243                 .maxcontacts = 4 },
 244         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 245                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 246                         MT_QUIRK_VALID_IS_INRANGE |
 247                         MT_QUIRK_SLOT_IS_CONTACTID,
 248                 .maxcontacts = 2
 249         },
 250         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 251                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 252                         MT_QUIRK_SLOT_IS_CONTACTID
 253         },
 254
 255         { .name = MT_CLS_FLATFROG,
 256                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 257                         MT_QUIRK_NO_AREA,
 258                 .sn_move = 2048,
 259                 .maxcontacts = 40,
 260         },
 261         { }
 262 };
 263
 264 static void mt_free_input_name(struct hid_input *hi)
 265 {
 266         struct hid_device *hdev = hi->report->device;
 267         const char *name = hi->input->name;
 268
 269         if (name != hdev->name) {
 270                 hi->input->name = hdev->name;
 271                 kfree(name);
 272         }
 273 }
 274
 275 static ssize_t mt_show_quirks(struct device *dev,
 276                            struct device_attribute *attr,
 277                            char *buf)
 278 {
 279         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 280         struct mt_device *td = hid_get_drvdata(hdev);
 281
 282         return sprintf(buf, "%u\n", td->mtclass.quirks);
 283 }
 284
 285 static ssize_t mt_set_quirks(struct device *dev,
 286                           struct device_attribute *attr,
 287                           const char *buf, size_t count)
 288 {
 289         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 290         struct mt_device *td = hid_get_drvdata(hdev);
 291
 292         unsigned long val;
 293
 294         if (kstrtoul(buf, 0, &val))
 295                 return -EINVAL;
 296
 297         td->mtclass.quirks = val;
 298
 299         if (td->cc_index < 0)
 300                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 301
 302         return count;
 303 }
 304
 305 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 306
 307 static struct attribute *sysfs_attrs[] = {
 308         &dev_attr_quirks.attr,
 309         NULL
 310 };
 311
 312 static struct attribute_group mt_attribute_group = {
 313         .attrs = sysfs_attrs
 314 };
 315
 316 static void mt_feature_mapping(struct hid_device *hdev,
 317                 struct hid_field *field, struct hid_usage *usage)
 318 {
 319         struct mt_device *td = hid_get_drvdata(hdev);
 320
 321         switch (usage->hid) {
 322         case HID_DG_INPUTMODE:
 323                 /* Ignore if value index is out of bounds. */
 324                 if (usage->usage_index >= field->report_count) {
 325                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 326                         break;
 327                 }
 328
 329                 td->inputmode = field->report->id;
 330                 td->inputmode_index = usage->usage_index;
 331
 332                 break;
 333         case HID_DG_CONTACTMAX:
 334                 td->maxcontact_report_id = field->report->id;
 335                 td->maxcontacts = field->value[0];
 336                 if (!td->maxcontacts &&
 337                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 338                         td->maxcontacts = field->logical_maximum;
 339                 if (td->mtclass.maxcontacts)
 340                         /* check if the maxcontacts is given by the class */
 341                         td->maxcontacts = td->mtclass.maxcontacts;
 342
 343                 break;
 344         case 0xff0000c5:
 345                 if (field->report_count == 256 && field->report_size == 8) {
 346                         /* Win 8 devices need special quirks */
 347                         __s32 *quirks = &td->mtclass.quirks;
 348                         *quirks |= MT_QUIRK_ALWAYS_VALID;
 349                         *quirks |= MT_QUIRK_IGNORE_DUPLICATES;
 350                         *quirks |= MT_QUIRK_HOVERING;
 351                         *quirks |= MT_QUIRK_CONTACT_CNT_ACCURATE;
 352                         *quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 353                         *quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 354                         *quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 355                 }
 356                 break;
 357         }
 358 }
 359
 360 static void set_abs(struct input_dev *input, unsigned int code,
 361                 struct hid_field *field, int snratio)
 362 {
 363         int fmin = field->logical_minimum;
 364         int fmax = field->logical_maximum;
 365         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 366         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 367         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 368 }
 369
 370 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 371                 struct hid_input *hi)
 372 {
 373         struct mt_fields *f = td->fields;
 374
 375         if (f->length >= HID_MAX_FIELDS)
 376                 return;
 377
 378         f->usages[f->length++] = usage->hid;
 379 }
 380
 381 static int mt_pen_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 382                 struct hid_field *field, struct hid_usage *usage,
 383                 unsigned long **bit, int *max)
 384 {
 385         struct mt_device *td = hid_get_drvdata(hdev);
 386
 387         td->pen_report_id = field->report->id;
 388
 389         return 0;
 390 }
 391
 392 static int mt_pen_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 393                 struct hid_field *field, struct hid_usage *usage,
 394                 unsigned long **bit, int *max)
 395 {
 396         return 0;
 397 }
 398
 399 static int mt_pen_event(struct hid_device *hid, struct hid_field *field,
 400                                 struct hid_usage *usage, __s32 value)
 401 {
 402         /* let hid-input handle it */
 403         return 0;
 404 }
 405
 406 static void mt_pen_report(struct hid_device *hid, struct hid_report *report)
 407 {
 408         struct hid_field *field = report->field[0];
 409
 410         input_sync(field->hidinput->input);
 411 }
 412
 413 static void mt_pen_input_configured(struct hid_device *hdev,
 414                                         struct hid_input *hi)
 415 {
 416         char *name = kzalloc(strlen(hi->input->name) + 5, GFP_KERNEL);
 417         if (name) {
 418                 sprintf(name, "%s Pen", hi->input->name);
 419                 mt_free_input_name(hi);
 420                 hi->input->name = name;
 421         }
 422
 423         /* force BTN_STYLUS to allow tablet matching in udev */
 424         __set_bit(BTN_STYLUS, hi->input->keybit);
 425 }
 426
 427 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 428                 struct hid_field *field, struct hid_usage *usage,
 429                 unsigned long **bit, int *max)
 430 {
 431         struct mt_device *td = hid_get_drvdata(hdev);
 432         struct mt_class *cls = &td->mtclass;
 433         int code;
 434         struct hid_usage *prev_usage = NULL;
 435
 436         if (field->application == HID_DG_TOUCHSCREEN)
 437                 td->mt_flags |= INPUT_MT_DIRECT;
 438
 439         /*
 440          * Model touchscreens providing buttons as touchpads.
 441          */
 442         if (field->application == HID_DG_TOUCHPAD ||
 443             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 444                 td->mt_flags |= INPUT_MT_POINTER;
 445
 446         /* Only map fields from TouchScreen or TouchPad collections.
 447          * We need to ignore fields that belong to other collections
 448          * such as Mouse that might have the same GenericDesktop usages. */
 449         if (field->application == HID_DG_TOUCHSCREEN)
 450                 set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
 451         else if (field->application == HID_DG_TOUCHPAD)
 452                 set_bit(INPUT_PROP_POINTER, hi->input->propbit);
 453         else
 454                 return 0;
 455
 456         if (usage->usage_index)
 457                 prev_usage = &field->usage[usage->usage_index - 1];
 458
 459         switch (usage->hid & HID_USAGE_PAGE) {
 460
 461         case HID_UP_GENDESK:
 462                 switch (usage->hid) {
 463                 case HID_GD_X:
 464                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 465                                 hid_map_usage(hi, usage, bit, max,
 466                                         EV_ABS, ABS_MT_TOOL_X);
 467                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
 468                                         cls->sn_move);
 469                         } else {
 470                                 hid_map_usage(hi, usage, bit, max,
 471                                         EV_ABS, ABS_MT_POSITION_X);
 472                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
 473                                         cls->sn_move);
 474                         }
 475
 476                         mt_store_field(usage, td, hi);
 477                         return 1;
 478                 case HID_GD_Y:
 479                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 480                                 hid_map_usage(hi, usage, bit, max,
 481                                         EV_ABS, ABS_MT_TOOL_Y);
 482                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
 483                                         cls->sn_move);
 484                         } else {
 485                                 hid_map_usage(hi, usage, bit, max,
 486                                         EV_ABS, ABS_MT_POSITION_Y);
 487                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
 488                                         cls->sn_move);
 489                         }
 490
 491                         mt_store_field(usage, td, hi);
 492                         return 1;
 493                 }
 494                 return 0;
 495
 496         case HID_UP_DIGITIZER:
 497                 switch (usage->hid) {
 498                 case HID_DG_INRANGE:
 499                         if (cls->quirks & MT_QUIRK_HOVERING) {
 500                                 hid_map_usage(hi, usage, bit, max,
 501                                         EV_ABS, ABS_MT_DISTANCE);
 502                                 input_set_abs_params(hi->input,
 503                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 504                         }
 505                         mt_store_field(usage, td, hi);
 506                         return 1;
 507                 case HID_DG_CONFIDENCE:
 508                         mt_store_field(usage, td, hi);
 509                         return 1;
 510                 case HID_DG_TIPSWITCH:
 511                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 512                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 513                         mt_store_field(usage, td, hi);
 514                         return 1;
 515                 case HID_DG_CONTACTID:
 516                         mt_store_field(usage, td, hi);
 517                         td->touches_by_report++;
 518                         td->mt_report_id = field->report->id;
 519                         return 1;
 520                 case HID_DG_WIDTH:
 521                         hid_map_usage(hi, usage, bit, max,
 522                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 523                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
 524                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 525                                         cls->sn_width);
 526                         mt_store_field(usage, td, hi);
 527                         return 1;
 528                 case HID_DG_HEIGHT:
 529                         hid_map_usage(hi, usage, bit, max,
 530                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 531                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 532                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 533                                         cls->sn_height);
 534                                 input_set_abs_params(hi->input,
 535                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 536                         }
 537                         mt_store_field(usage, td, hi);
 538                         return 1;
 539                 case HID_DG_TIPPRESSURE:
 540                         hid_map_usage(hi, usage, bit, max,
 541                                         EV_ABS, ABS_MT_PRESSURE);
 542                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 543                                 cls->sn_pressure);
 544                         mt_store_field(usage, td, hi);
 545                         return 1;
 546                 case HID_DG_CONTACTCOUNT:
 547                         /* Ignore if indexes are out of bounds. */
 548                         if (field->index >= field->report->maxfield ||
 549                             usage->usage_index >= field->report_count)
 550                                 return 1;
 551                         td->cc_index = field->index;
 552                         td->cc_value_index = usage->usage_index;
 553                         return 1;
 554                 case HID_DG_CONTACTMAX:
 555                         /* we don't set td->last_slot_field as contactcount and
 556                          * contact max are global to the report */
 557                         return -1;
 558                 case HID_DG_TOUCH:
 559                         /* Legacy devices use TIPSWITCH and not TOUCH.
 560                          * Let's just ignore this field. */
 561                         return -1;
 562                 }
 563                 /* let hid-input decide for the others */
 564                 return 0;
 565
 566         case HID_UP_BUTTON:
 567                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 568                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 569                 input_set_capability(hi->input, EV_KEY, code);
 570                 return 1;
 571
 572         case 0xff000000:
 573                 /* we do not want to map these: no input-oriented meaning */
 574                 return -1;
 575         }
 576
 577         return 0;
 578 }
 579
 580 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 581                 struct hid_field *field, struct hid_usage *usage,
 582                 unsigned long **bit, int *max)
 583 {
 584         if (usage->type == EV_KEY || usage->type == EV_ABS)
 585                 set_bit(usage->type, hi->input->evbit);
 586
 587         return -1;
 588 }
 589
 590 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 591 {
 592         __s32 quirks = td->mtclass.quirks;
 593
 594         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 595                 return td->curdata.contactid;
 596
 597         if (quirks & MT_QUIRK_CYPRESS)
 598                 return cypress_compute_slot(td);
 599
 600         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 601                 return td->num_received;
 602
 603         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 604                 return td->curdata.contactid - 1;
 605
 606         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 607 }
 608
 609 /*
 610  * this function is called when a whole contact has been processed,
 611  * so that it can assign it to a slot and store the data there
 612  */
 613 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 614 {
 615         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 616             td->num_received >= td->num_expected)
 617                 return;
 618
 619         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
 620                 int slotnum = mt_compute_slot(td, input);
 621                 struct mt_slot *s = &td->curdata;
 622                 struct input_mt *mt = input->mt;
 623
 624                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 625                         return;
 626
 627                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
 628                         struct input_mt_slot *slot = &mt->slots[slotnum];
 629                         if (input_mt_is_active(slot) &&
 630                             input_mt_is_used(mt, slot))
 631                                 return;
 632                 }
 633
 634                 input_mt_slot(input, slotnum);
 635                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
 636                         s->touch_state || s->inrange_state);
 637                 if (s->touch_state || s->inrange_state) {
 638                         /* this finger is in proximity of the sensor */
 639                         int wide = (s->w > s->h);
 640                         /* divided by two to match visual scale of touch */
 641                         int major = max(s->w, s->h) >> 1;
 642                         int minor = min(s->w, s->h) >> 1;
 643
 644                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 645                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 646                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
 647                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
 648                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
 649                                 !s->touch_state);
 650                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 651                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 652                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 653                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 654                 }
 655         }
 656
 657         td->num_received++;
 658 }
 659
 660 /*
 661  * this function is called when a whole packet has been received and processed,
 662  * so that it can decide what to send to the input layer.
 663  */
 664 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 665 {
 666         input_mt_sync_frame(input);
 667         input_sync(input);
 668         td->num_received = 0;
 669 }
 670
 671 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 672                                 struct hid_usage *usage, __s32 value)
 673 {
 674         /* we will handle the hidinput part later, now remains hiddev */
 675         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 676                 hid->hiddev_hid_event(hid, field, usage, value);
 677
 678         return 1;
 679 }
 680
 681 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 682                                 struct hid_usage *usage, __s32 value)
 683 {
 684         struct mt_device *td = hid_get_drvdata(hid);
 685         __s32 quirks = td->mtclass.quirks;
 686         struct input_dev *input = field->hidinput->input;
 687
 688         if (hid->claimed & HID_CLAIMED_INPUT) {
 689                 switch (usage->hid) {
 690                 case HID_DG_INRANGE:
 691                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 692                                 td->curvalid = value;
 693                         if (quirks & MT_QUIRK_HOVERING)
 694                                 td->curdata.inrange_state = value;
 695                         break;
 696                 case HID_DG_TIPSWITCH:
 697                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 698                                 td->curvalid = value;
 699                         td->curdata.touch_state = value;
 700                         break;
 701                 case HID_DG_CONFIDENCE:
 702                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 703                                 td->curvalid = value;
 704                         break;
 705                 case HID_DG_CONTACTID:
 706                         td->curdata.contactid = value;
 707                         break;
 708                 case HID_DG_TIPPRESSURE:
 709                         td->curdata.p = value;
 710                         break;
 711                 case HID_GD_X:
 712                         if (usage->code == ABS_MT_TOOL_X)
 713                                 td->curdata.cx = value;
 714                         else
 715                                 td->curdata.x = value;
 716                         break;
 717                 case HID_GD_Y:
 718                         if (usage->code == ABS_MT_TOOL_Y)
 719                                 td->curdata.cy = value;
 720                         else
 721                                 td->curdata.y = value;
 722                         break;
 723                 case HID_DG_WIDTH:
 724                         td->curdata.w = value;
 725                         break;
 726                 case HID_DG_HEIGHT:
 727                         td->curdata.h = value;
 728                         break;
 729                 case HID_DG_CONTACTCOUNT:
 730                         break;
 731                 case HID_DG_TOUCH:
 732                         /* do nothing */
 733                         break;
 734
 735                 default:
 736                         if (usage->type)
 737                                 input_event(input, usage->type, usage->code,
 738                                                 value);
 739                         return;
 740                 }
 741
 742                 if (usage->usage_index + 1 == field->report_count) {
 743                         /* we only take into account the last report. */
 744                         if (usage->hid == td->last_slot_field)
 745                                 mt_complete_slot(td, field->hidinput->input);
 746                 }
 747
 748         }
 749 }
 750
 751 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
 752 {
 753         struct mt_device *td = hid_get_drvdata(hid);
 754         struct hid_field *field;
 755         unsigned count;
 756         int r, n;
 757
 758         /*
 759          * Includes multi-packet support where subsequent
 760          * packets are sent with zero contactcount.
 761          */
 762         if (td->cc_index >= 0) {
 763                 struct hid_field *field = report->field[td->cc_index];
 764                 int value = field->value[td->cc_value_index];
 765                 if (value)
 766                         td->num_expected = value;
 767         }
 768
 769         for (r = 0; r < report->maxfield; r++) {
 770                 field = report->field[r];
 771                 count = field->report_count;
 772
 773                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 774                         continue;
 775
 776                 for (n = 0; n < count; n++)
 777                         mt_process_mt_event(hid, field, &field->usage[n],
 778                                         field->value[n]);
 779         }
 780
 781         if (td->num_received >= td->num_expected)
 782                 mt_sync_frame(td, report->field[0]->hidinput->input);
 783 }
 784
 785 static int mt_touch_input_configured(struct hid_device *hdev,
 786                                         struct hid_input *hi)
 787 {
 788         struct mt_device *td = hid_get_drvdata(hdev);
 789         struct mt_class *cls = &td->mtclass;
 790         struct input_dev *input = hi->input;
 791         int ret;
 792
 793         if (!td->maxcontacts)
 794                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 795
 796         mt_post_parse(td);
 797         if (td->serial_maybe)
 798                 mt_post_parse_default_settings(td);
 799
 800         if (cls->is_indirect)
 801                 td->mt_flags |= INPUT_MT_POINTER;
 802
 803         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 804                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 805
 806         ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 807         if (ret)
 808                 return ret;
 809
 810         td->mt_flags = 0;
 811         return 0;
 812 }
 813
 814 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 815                 struct hid_field *field, struct hid_usage *usage,
 816                 unsigned long **bit, int *max)
 817 {
 818         /* Only map fields from TouchScreen or TouchPad collections.
 819         * We need to ignore fields that belong to other collections
 820         * such as Mouse that might have the same GenericDesktop usages. */
 821         if (field->application != HID_DG_TOUCHSCREEN &&
 822             field->application != HID_DG_PEN &&
 823             field->application != HID_DG_TOUCHPAD)
 824                 return -1;
 825
 826         if (field->physical == HID_DG_STYLUS)
 827                 return mt_pen_input_mapping(hdev, hi, field, usage, bit, max);
 828
 829         return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
 830 }
 831
 832 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 833                 struct hid_field *field, struct hid_usage *usage,
 834                 unsigned long **bit, int *max)
 835 {
 836         if (field->physical == HID_DG_STYLUS)
 837                 return mt_pen_input_mapped(hdev, hi, field, usage, bit, max);
 838
 839         return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
 840 }
 841
 842 static int mt_event(struct hid_device *hid, struct hid_field *field,
 843                                 struct hid_usage *usage, __s32 value)
 844 {
 845         struct mt_device *td = hid_get_drvdata(hid);
 846
 847         if (field->report->id == td->mt_report_id)
 848                 return mt_touch_event(hid, field, usage, value);
 849
 850         if (field->report->id == td->pen_report_id)
 851                 return mt_pen_event(hid, field, usage, value);
 852
 853         /* ignore other reports */
 854         return 1;
 855 }
 856
 857 static void mt_report(struct hid_device *hid, struct hid_report *report)
 858 {
 859         struct mt_device *td = hid_get_drvdata(hid);
 860
 861         if (!(hid->claimed & HID_CLAIMED_INPUT))
 862                 return;
 863
 864         if (report->id == td->mt_report_id)
 865                 mt_touch_report(hid, report);
 866
 867         if (report->id == td->pen_report_id)
 868                 mt_pen_report(hid, report);
 869 }
 870
 871 static void mt_set_input_mode(struct hid_device *hdev)
 872 {
 873         struct mt_device *td = hid_get_drvdata(hdev);
 874         struct hid_report *r;
 875         struct hid_report_enum *re;
 876
 877         if (td->inputmode < 0)
 878                 return;
 879
 880         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 881         r = re->report_id_hash[td->inputmode];
 882         if (r) {
 883                 r->field[0]->value[td->inputmode_index] = 0x02;
 884                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 885         }
 886 }
 887
 888 static void mt_set_maxcontacts(struct hid_device *hdev)
 889 {
 890         struct mt_device *td = hid_get_drvdata(hdev);
 891         struct hid_report *r;
 892         struct hid_report_enum *re;
 893         int fieldmax, max;
 894
 895         if (td->maxcontact_report_id < 0)
 896                 return;
 897
 898         if (!td->mtclass.maxcontacts)
 899                 return;
 900
 901         re = &hdev->report_enum[HID_FEATURE_REPORT];
 902         r = re->report_id_hash[td->maxcontact_report_id];
 903         if (r) {
 904                 max = td->mtclass.maxcontacts;
 905                 fieldmax = r->field[0]->logical_maximum;
 906                 max = min(fieldmax, max);
 907                 if (r->field[0]->value[0] != max) {
 908                         r->field[0]->value[0] = max;
 909                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 910                 }
 911         }
 912 }
 913
 914 static void mt_post_parse_default_settings(struct mt_device *td)
 915 {
 916         __s32 quirks = td->mtclass.quirks;
 917
 918         /* unknown serial device needs special quirks */
 919         if (td->touches_by_report == 1) {
 920                 quirks |= MT_QUIRK_ALWAYS_VALID;
 921                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
 922                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
 923                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
 924                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 925         }
 926
 927         td->mtclass.quirks = quirks;
 928 }
 929
 930 static void mt_post_parse(struct mt_device *td)
 931 {
 932         struct mt_fields *f = td->fields;
 933         struct mt_class *cls = &td->mtclass;
 934
 935         if (td->touches_by_report > 0) {
 936                 int field_count_per_touch = f->length / td->touches_by_report;
 937                 td->last_slot_field = f->usages[field_count_per_touch - 1];
 938         }
 939
 940         if (td->cc_index < 0)
 941                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 942 }
 943
 944 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
 945 {
 946         struct mt_device *td = hid_get_drvdata(hdev);
 947         char *name = kstrdup(hdev->name, GFP_KERNEL);
 948         int ret = 0;
 949
 950         if (name)
 951                 hi->input->name = name;
 952
 953         if (hi->report->id == td->mt_report_id)
 954                 ret = mt_touch_input_configured(hdev, hi);
 955
 956         if (hi->report->id == td->pen_report_id)
 957                 mt_pen_input_configured(hdev, hi);
 958         return ret;
 959 }
 960
 961 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 962 {
 963         int ret, i;
 964         struct mt_device *td;
 965         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 966         struct hid_input *hi;
 967
 968         for (i = 0; mt_classes[i].name ; i++) {
 969                 if (id->driver_data == mt_classes[i].name) {
 970                         mtclass = &(mt_classes[i]);
 971                         break;
 972                 }
 973         }
 974
 975         /* This allows the driver to correctly support devices
 976          * that emit events over several HID messages.
 977          */
 978         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 979
 980         /*
 981          * This allows the driver to handle different input sensors
 982          * that emits events through different reports on the same HID
 983          * device.
 984          */
 985         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
 986         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
 987
 988         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 989         if (!td) {
 990                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 991                 return -ENOMEM;
 992         }
 993         td->mtclass = *mtclass;
 994         td->inputmode = -1;
 995         td->maxcontact_report_id = -1;
 996         td->cc_index = -1;
 997         td->mt_report_id = -1;
 998         td->pen_report_id = -1;
 999         hid_set_drvdata(hdev, td);
1000
1001         td->fields = kzalloc(sizeof(struct mt_fields), GFP_KERNEL);
1002         if (!td->fields) {
1003                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1004                 ret = -ENOMEM;
1005                 goto fail;
1006         }
1007
1008         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1009                 td->serial_maybe = true;
1010
1011         ret = hid_parse(hdev);
1012         if (ret != 0)
1013                 goto fail;
1014
1015         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1016         if (ret)
1017                 goto hid_fail;
1018
1019         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1020
1021         mt_set_maxcontacts(hdev);
1022         mt_set_input_mode(hdev);
1023
1024         kfree(td->fields);
1025         td->fields = NULL;
1026
1027         return 0;
1028
1029 hid_fail:
1030         list_for_each_entry(hi, &hdev->inputs, list)
1031                 mt_free_input_name(hi);
1032 fail:
1033         kfree(td->fields);
1034         kfree(td);
1035         return ret;
1036 }
1037
1038 #ifdef CONFIG_PM
1039 static int mt_reset_resume(struct hid_device *hdev)
1040 {
1041         mt_set_maxcontacts(hdev);
1042         mt_set_input_mode(hdev);
1043         return 0;
1044 }
1045
1046 static int mt_resume(struct hid_device *hdev)
1047 {
1048         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1049          * It should be safe to send it to other devices too.
1050          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1051
1052         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1053
1054         return 0;
1055 }
1056 #endif
1057
1058 static void mt_remove(struct hid_device *hdev)
1059 {
1060         struct mt_device *td = hid_get_drvdata(hdev);
1061         struct hid_input *hi;
1062
1063         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1064         list_for_each_entry(hi, &hdev->inputs, list)
1065                 mt_free_input_name(hi);
1066
1067         hid_hw_stop(hdev);
1068
1069         kfree(td);
1070         hid_set_drvdata(hdev, NULL);
1071 }
1072
1073 static const struct hid_device_id mt_devices[] = {
1074
1075         /* 3M panels */
1076         { .driver_data = MT_CLS_3M,
1077                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1078                         USB_DEVICE_ID_3M1968) },
1079         { .driver_data = MT_CLS_3M,
1080                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1081                         USB_DEVICE_ID_3M2256) },
1082         { .driver_data = MT_CLS_3M,
1083                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1084                         USB_DEVICE_ID_3M3266) },
1085
1086         /* ActionStar panels */
1087         { .driver_data = MT_CLS_NSMU,
1088                 MT_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
1089                         USB_DEVICE_ID_ACTIONSTAR_1011) },
1090
1091         /* Atmel panels */
1092         { .driver_data = MT_CLS_SERIAL,
1093                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1094                         USB_DEVICE_ID_ATMEL_MULTITOUCH) },
1095         { .driver_data = MT_CLS_SERIAL,
1096                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1097                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1098
1099         /* Baanto multitouch devices */
1100         { .driver_data = MT_CLS_NSMU,
1101                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1102                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1103         /* Cando panels */
1104         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1105                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1106                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1107         { .driver_data = MT_CLS_DUAL_CONTACT_NUMBER,
1108                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1109                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
1110         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1111                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1112                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
1113         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1114                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1115                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1116
1117         /* Chunghwa Telecom touch panels */
1118         {  .driver_data = MT_CLS_NSMU,
1119                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1120                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1121
1122         /* CVTouch panels */
1123         { .driver_data = MT_CLS_NSMU,
1124                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1125                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1126
1127         /* Cypress panel */
1128         { .driver_data = MT_CLS_CYPRESS,
1129                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
1130                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
1131
1132         /* eGalax devices (resistive) */
1133         { .driver_data = MT_CLS_EGALAX,
1134                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1135                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1136         { .driver_data = MT_CLS_EGALAX,
1137                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1138                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1139
1140         /* eGalax devices (capacitive) */
1141         { .driver_data = MT_CLS_EGALAX,
1142                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1143                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1144         { .driver_data = MT_CLS_EGALAX_SERIAL,
1145                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1146                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1147         { .driver_data = MT_CLS_EGALAX_SERIAL,
1148                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1149                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1150         { .driver_data = MT_CLS_EGALAX_SERIAL,
1151                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1152                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1153         { .driver_data = MT_CLS_EGALAX_SERIAL,
1154                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1155                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1156         { .driver_data = MT_CLS_EGALAX,
1157                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1158                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1159         { .driver_data = MT_CLS_EGALAX_SERIAL,
1160                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1161                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1162         { .driver_data = MT_CLS_EGALAX,
1163                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1164                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1165         { .driver_data = MT_CLS_EGALAX_SERIAL,
1166                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1167                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1168         { .driver_data = MT_CLS_EGALAX,
1169                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1170                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1171         { .driver_data = MT_CLS_EGALAX,
1172                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1173                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1174         { .driver_data = MT_CLS_EGALAX_SERIAL,
1175                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1176                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1177         { .driver_data = MT_CLS_EGALAX_SERIAL,
1178                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1179                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1180         { .driver_data = MT_CLS_EGALAX_SERIAL,
1181                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1182                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1183         { .driver_data = MT_CLS_EGALAX,
1184                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1185                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1186         { .driver_data = MT_CLS_EGALAX,
1187                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1188                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1189         { .driver_data = MT_CLS_EGALAX,
1190                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1191                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1192
1193         /* Elo TouchSystems IntelliTouch Plus panel */
1194         { .driver_data = MT_CLS_DUAL_CONTACT_ID,
1195                 MT_USB_DEVICE(USB_VENDOR_ID_ELO,
1196                         USB_DEVICE_ID_ELO_TS2515) },
1197
1198         /* Flatfrog Panels */
1199         { .driver_data = MT_CLS_FLATFROG,
1200                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1201                         USB_DEVICE_ID_MULTITOUCH_3200) },
1202
1203         /* GeneralTouch panel */
1204         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1205                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1206                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1207         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1208                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1209                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1210         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1211                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1212                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1213         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1214                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1215                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1216         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1217                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1218                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1219         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1220                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1221                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1222         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1223                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1224                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1225
1226         /* Gametel game controller */
1227         { .driver_data = MT_CLS_NSMU,
1228                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1229                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1230
1231         /* GoodTouch panels */
1232         { .driver_data = MT_CLS_NSMU,
1233                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1234                         USB_DEVICE_ID_GOODTOUCH_000f) },
1235
1236         /* Hanvon panels */
1237         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1238                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1239                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1240
1241         /* Ideacom panel */
1242         { .driver_data = MT_CLS_SERIAL,
1243                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1244                         USB_DEVICE_ID_IDEACOM_IDC6650) },
1245         { .driver_data = MT_CLS_SERIAL,
1246                 MT_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
1247                         USB_DEVICE_ID_IDEACOM_IDC6651) },
1248
1249         /* Ilitek dual touch panel */
1250         {  .driver_data = MT_CLS_NSMU,
1251                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1252                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1253
1254         /* IRTOUCH panels */
1255         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1256                 MT_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
1257                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
1258
1259         /* LG Display panels */
1260         { .driver_data = MT_CLS_DEFAULT,
1261                 MT_USB_DEVICE(USB_VENDOR_ID_LG,
1262                         USB_DEVICE_ID_LG_MULTITOUCH) },
1263
1264         /* Lumio panels */
1265         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1266                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1267                         USB_DEVICE_ID_CRYSTALTOUCH) },
1268         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1269                 MT_USB_DEVICE(USB_VENDOR_ID_LUMIO,
1270                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
1271
1272         /* MosArt panels */
1273         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1274                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1275                         USB_DEVICE_ID_ASUS_T91MT)},
1276         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1277                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1278                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1279         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1280                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1281                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1282
1283         /* Nexio panels */
1284         { .driver_data = MT_CLS_DEFAULT,
1285                 MT_USB_DEVICE(USB_VENDOR_ID_NEXIO,
1286                         USB_DEVICE_ID_NEXIO_MULTITOUCH_420)},
1287
1288         /* Panasonic panels */
1289         { .driver_data = MT_CLS_PANASONIC,
1290                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1291                         USB_DEVICE_ID_PANABOARD_UBT780) },
1292         { .driver_data = MT_CLS_PANASONIC,
1293                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1294                         USB_DEVICE_ID_PANABOARD_UBT880) },
1295
1296         /* Novatek Panel */
1297         { .driver_data = MT_CLS_NSMU,
1298                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1299                         USB_DEVICE_ID_NOVATEK_PCT) },
1300
1301         /* PenMount panels */
1302         { .driver_data = MT_CLS_CONFIDENCE,
1303                 MT_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
1304                         USB_DEVICE_ID_PENMOUNT_PCI) },
1305
1306         /* PixArt optical touch screen */
1307         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1308                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1309                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1310         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1311                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1312                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1313         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1314                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1315                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1316
1317         /* PixCir-based panels */
1318         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1319                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON,
1320                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
1321         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1322                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1323                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1324
1325         /* Quanta-based panels */
1326         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1327                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1328                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
1329         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1330                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1331                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1332         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1333                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1334                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
1335
1336         /* SiS panels */
1337         { .driver_data = MT_CLS_DEFAULT,
1338                 HID_USB_DEVICE(USB_VENDOR_ID_SIS2_TOUCH,
1339                 USB_DEVICE_ID_SIS9200_TOUCH) },
1340         { .driver_data = MT_CLS_DEFAULT,
1341                 HID_USB_DEVICE(USB_VENDOR_ID_SIS2_TOUCH,
1342                 USB_DEVICE_ID_SIS817_TOUCH) },
1343
1344         /* Stantum panels */
1345         { .driver_data = MT_CLS_CONFIDENCE,
1346                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM,
1347                         USB_DEVICE_ID_MTP)},
1348         { .driver_data = MT_CLS_CONFIDENCE,
1349                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1350                         USB_DEVICE_ID_MTP_STM)},
1351         { .driver_data = MT_CLS_DEFAULT,
1352                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
1353                         USB_DEVICE_ID_MTP_SITRONIX)},
1354
1355         /* TopSeed panels */
1356         { .driver_data = MT_CLS_TOPSEED,
1357                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1358                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1359
1360         /* Touch International panels */
1361         { .driver_data = MT_CLS_NSMU,
1362                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1363                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1364
1365         /* Unitec panels */
1366         { .driver_data = MT_CLS_NSMU,
1367                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1368                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1369         { .driver_data = MT_CLS_NSMU,
1370                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1371                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1372
1373         /* Wistron panels */
1374         { .driver_data = MT_CLS_NSMU,
1375                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1376                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1377
1378         /* XAT */
1379         { .driver_data = MT_CLS_NSMU,
1380                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1381                         USB_DEVICE_ID_XAT_CSR) },
1382
1383         /* Xiroku */
1384         { .driver_data = MT_CLS_NSMU,
1385                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1386                         USB_DEVICE_ID_XIROKU_SPX) },
1387         { .driver_data = MT_CLS_NSMU,
1388                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1389                         USB_DEVICE_ID_XIROKU_MPX) },
1390         { .driver_data = MT_CLS_NSMU,
1391                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1392                         USB_DEVICE_ID_XIROKU_CSR) },
1393         { .driver_data = MT_CLS_NSMU,
1394                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1395                         USB_DEVICE_ID_XIROKU_SPX1) },
1396         { .driver_data = MT_CLS_NSMU,
1397                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1398                         USB_DEVICE_ID_XIROKU_MPX1) },
1399         { .driver_data = MT_CLS_NSMU,
1400                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1401                         USB_DEVICE_ID_XIROKU_CSR1) },
1402         { .driver_data = MT_CLS_NSMU,
1403                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1404                         USB_DEVICE_ID_XIROKU_SPX2) },
1405         { .driver_data = MT_CLS_NSMU,
1406                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1407                         USB_DEVICE_ID_XIROKU_MPX2) },
1408         { .driver_data = MT_CLS_NSMU,
1409                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1410                         USB_DEVICE_ID_XIROKU_CSR2) },
1411
1412         /* Zytronic panels */
1413         { .driver_data = MT_CLS_SERIAL,
1414                 MT_USB_DEVICE(USB_VENDOR_ID_ZYTRONIC,
1415                         USB_DEVICE_ID_ZYTRONIC_ZXY100) },
1416
1417         /* Generic MT device */
1418         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1419         { }
1420 };
1421 MODULE_DEVICE_TABLE(hid, mt_devices);
1422
1423 static const struct hid_usage_id mt_grabbed_usages[] = {
1424         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1425         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1426 };
1427
1428 static struct hid_driver mt_driver = {
1429         .name = "hid-multitouch",
1430         .id_table = mt_devices,
1431         .probe = mt_probe,
1432         .remove = mt_remove,
1433         .input_mapping = mt_input_mapping,
1434         .input_mapped = mt_input_mapped,
1435         .input_configured = mt_input_configured,
1436         .feature_mapping = mt_feature_mapping,
1437         .usage_table = mt_grabbed_usages,
1438         .event = mt_event,
1439         .report = mt_report,
1440 #ifdef CONFIG_PM
1441         .reset_resume = mt_reset_resume,
1442         .resume = mt_resume,
1443 #endif
1444 };
1445 module_hid_driver(mt_driver);