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/input/mt.h>
  46 #include <linux/string.h>
  47
  48
  49 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  50 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  51 MODULE_DESCRIPTION("HID multitouch panels");
  52 MODULE_LICENSE("GPL");
  53
  54 #include "hid-ids.h"
  55
  56 /* quirks to control the device */
  57 #define MT_QUIRK_NOT_SEEN_MEANS_UP      BIT(0)
  58 #define MT_QUIRK_SLOT_IS_CONTACTID      BIT(1)
  59 #define MT_QUIRK_CYPRESS                BIT(2)
  60 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
  61 #define MT_QUIRK_ALWAYS_VALID           BIT(4)
  62 #define MT_QUIRK_VALID_IS_INRANGE       BIT(5)
  63 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
  64 #define MT_QUIRK_CONFIDENCE             BIT(7)
  65 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
  66 #define MT_QUIRK_NO_AREA                BIT(9)
  67 #define MT_QUIRK_IGNORE_DUPLICATES      BIT(10)
  68 #define MT_QUIRK_HOVERING               BIT(11)
  69 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
  70 #define MT_QUIRK_FORCE_GET_FEATURE      BIT(13)
  71 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
  72 #define MT_QUIRK_TOUCH_SIZE_SCALING     BIT(15)
  73
  74 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  75 #define MT_INPUTMODE_TOUCHPAD           0x03
  76
  77 #define MT_BUTTONTYPE_CLICKPAD          0
  78
  79 struct mt_slot {
  80         __s32 x, y, cx, cy, p, w, h;
  81         __s32 contactid;        /* the device ContactID assigned to this slot */
  82         bool touch_state;       /* is the touch valid? */
  83         bool inrange_state;     /* is the finger in proximity of the sensor? */
  84         bool confidence_state;  /* is the touch made by a finger? */
  85 };
  86
  87 struct mt_class {
  88         __s32 name;     /* MT_CLS */
  89         __s32 quirks;
  90         __s32 sn_move;  /* Signal/noise ratio for move events */
  91         __s32 sn_width; /* Signal/noise ratio for width events */
  92         __s32 sn_height;        /* Signal/noise ratio for height events */
  93         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  94         __u8 maxcontacts;
  95         bool is_indirect;       /* true for touchpads */
  96         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
  97 };
  98
  99 struct mt_fields {
 100         unsigned usages[HID_MAX_FIELDS];
 101         unsigned int length;
 102 };
 103
 104 struct mt_device {
 105         struct mt_slot curdata; /* placeholder of incoming data */
 106         struct mt_class mtclass;        /* our mt device class */
 107         struct mt_fields *fields;       /* temporary placeholder for storing the
 108                                            multitouch fields */
 109         int cc_index;   /* contact count field index in the report */
 110         int cc_value_index;     /* contact count value index in the field */
 111         unsigned last_slot_field;       /* the last field of a slot */
 112         unsigned mt_report_id;  /* the report ID of the multitouch device */
 113         unsigned long initial_quirks;   /* initial quirks state */
 114         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
 115         __s16 inputmode_index;  /* InputMode HID feature index in the report */
 116         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
 117                                    -1 if non-existent */
 118         __u8 inputmode_value;  /* InputMode HID feature value */
 119         __u8 num_received;      /* how many contacts we received */
 120         __u8 num_expected;      /* expected last contact index */
 121         __u8 maxcontacts;
 122         __u8 touches_by_report; /* how many touches are present in one report:
 123                                 * 1 means we should use a serial protocol
 124                                 * > 1 means hybrid (multitouch) protocol */
 125         __u8 buttons_count;     /* number of physical buttons per touchpad */
 126         bool is_buttonpad;      /* is this device a button pad? */
 127         bool serial_maybe;      /* need to check for serial protocol */
 128         bool curvalid;          /* is the current contact valid? */
 129         unsigned mt_flags;      /* flags to pass to input-mt */
 130 };
 131
 132 static void mt_post_parse_default_settings(struct mt_device *td);
 133 static void mt_post_parse(struct mt_device *td);
 134
 135 /* classes of device behavior */
 136 #define MT_CLS_DEFAULT                          0x0001
 137
 138 #define MT_CLS_SERIAL                           0x0002
 139 #define MT_CLS_CONFIDENCE                       0x0003
 140 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 141 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 142 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 143 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 144 /* reserved                                     0x0008 */
 145 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 146 #define MT_CLS_NSMU                             0x000a
 147 /* reserved                                     0x0010 */
 148 /* reserved                                     0x0011 */
 149 #define MT_CLS_WIN_8                            0x0012
 150 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 151 #define MT_CLS_WIN_8_DUAL                       0x0014
 152
 153 /* vendor specific classes */
 154 #define MT_CLS_3M                               0x0101
 155 /* reserved                                     0x0102 */
 156 #define MT_CLS_EGALAX                           0x0103
 157 #define MT_CLS_EGALAX_SERIAL                    0x0104
 158 #define MT_CLS_TOPSEED                          0x0105
 159 #define MT_CLS_PANASONIC                        0x0106
 160 #define MT_CLS_FLATFROG                         0x0107
 161 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 162 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 163 #define MT_CLS_LG                               0x010a
 164 #define MT_CLS_VTL                              0x0110
 165 #define MT_CLS_GOOGLE                           0x0111
 166
 167 #define MT_DEFAULT_MAXCONTACT   10
 168 #define MT_MAX_MAXCONTACT       250
 169
 170 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 171 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 172
 173 /*
 174  * these device-dependent functions determine what slot corresponds
 175  * to a valid contact that was just read.
 176  */
 177
 178 static int cypress_compute_slot(struct mt_device *td)
 179 {
 180         if (td->curdata.contactid != 0 || td->num_received == 0)
 181                 return td->curdata.contactid;
 182         else
 183                 return -1;
 184 }
 185
 186 static struct mt_class mt_classes[] = {
 187         { .name = MT_CLS_DEFAULT,
 188                 .quirks = MT_QUIRK_ALWAYS_VALID |
 189                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 190         { .name = MT_CLS_NSMU,
 191                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 192         { .name = MT_CLS_SERIAL,
 193                 .quirks = MT_QUIRK_ALWAYS_VALID},
 194         { .name = MT_CLS_CONFIDENCE,
 195                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 196         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 197                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 198                         MT_QUIRK_SLOT_IS_CONTACTID },
 199         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 200                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 201                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 202         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 203                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 204                         MT_QUIRK_SLOT_IS_CONTACTID,
 205                 .maxcontacts = 2 },
 206         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 207                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 208                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 209                 .maxcontacts = 2 },
 210         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 211                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 212                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 213         { .name = MT_CLS_WIN_8,
 214                 .quirks = MT_QUIRK_ALWAYS_VALID |
 215                         MT_QUIRK_IGNORE_DUPLICATES |
 216                         MT_QUIRK_HOVERING |
 217                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 218         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 219                 .quirks = MT_QUIRK_ALWAYS_VALID |
 220                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 221                 .export_all_inputs = true },
 222         { .name = MT_CLS_WIN_8_DUAL,
 223                 .quirks = MT_QUIRK_ALWAYS_VALID |
 224                         MT_QUIRK_IGNORE_DUPLICATES |
 225                         MT_QUIRK_HOVERING |
 226                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 227                 .export_all_inputs = true },
 228
 229         /*
 230          * vendor specific classes
 231          */
 232         { .name = MT_CLS_3M,
 233                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 234                         MT_QUIRK_SLOT_IS_CONTACTID |
 235                         MT_QUIRK_TOUCH_SIZE_SCALING,
 236                 .sn_move = 2048,
 237                 .sn_width = 128,
 238                 .sn_height = 128,
 239                 .maxcontacts = 60,
 240         },
 241         { .name = MT_CLS_EGALAX,
 242                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 243                         MT_QUIRK_VALID_IS_INRANGE,
 244                 .sn_move = 4096,
 245                 .sn_pressure = 32,
 246         },
 247         { .name = MT_CLS_EGALAX_SERIAL,
 248                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 249                         MT_QUIRK_ALWAYS_VALID,
 250                 .sn_move = 4096,
 251                 .sn_pressure = 32,
 252         },
 253         { .name = MT_CLS_TOPSEED,
 254                 .quirks = MT_QUIRK_ALWAYS_VALID,
 255                 .is_indirect = true,
 256                 .maxcontacts = 2,
 257         },
 258         { .name = MT_CLS_PANASONIC,
 259                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 260                 .maxcontacts = 4 },
 261         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 262                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 263                         MT_QUIRK_VALID_IS_INRANGE |
 264                         MT_QUIRK_SLOT_IS_CONTACTID,
 265                 .maxcontacts = 2
 266         },
 267         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 268                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 269                         MT_QUIRK_SLOT_IS_CONTACTID
 270         },
 271
 272         { .name = MT_CLS_FLATFROG,
 273                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 274                         MT_QUIRK_NO_AREA,
 275                 .sn_move = 2048,
 276                 .maxcontacts = 40,
 277         },
 278         { .name = MT_CLS_LG,
 279                 .quirks = MT_QUIRK_ALWAYS_VALID |
 280                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 281                         MT_QUIRK_IGNORE_DUPLICATES |
 282                         MT_QUIRK_HOVERING |
 283                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 284         { .name = MT_CLS_VTL,
 285                 .quirks = MT_QUIRK_ALWAYS_VALID |
 286                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 287                         MT_QUIRK_FORCE_GET_FEATURE,
 288         },
 289         { .name = MT_CLS_GOOGLE,
 290                 .quirks = MT_QUIRK_ALWAYS_VALID |
 291                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 292                         MT_QUIRK_SLOT_IS_CONTACTID |
 293                         MT_QUIRK_HOVERING
 294         },
 295         { }
 296 };
 297
 298 static ssize_t mt_show_quirks(struct device *dev,
 299                            struct device_attribute *attr,
 300                            char *buf)
 301 {
 302         struct hid_device *hdev = to_hid_device(dev);
 303         struct mt_device *td = hid_get_drvdata(hdev);
 304
 305         return sprintf(buf, "%u\n", td->mtclass.quirks);
 306 }
 307
 308 static ssize_t mt_set_quirks(struct device *dev,
 309                           struct device_attribute *attr,
 310                           const char *buf, size_t count)
 311 {
 312         struct hid_device *hdev = to_hid_device(dev);
 313         struct mt_device *td = hid_get_drvdata(hdev);
 314
 315         unsigned long val;
 316
 317         if (kstrtoul(buf, 0, &val))
 318                 return -EINVAL;
 319
 320         td->mtclass.quirks = val;
 321
 322         if (td->cc_index < 0)
 323                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 324
 325         return count;
 326 }
 327
 328 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 329
 330 static struct attribute *sysfs_attrs[] = {
 331         &dev_attr_quirks.attr,
 332         NULL
 333 };
 334
 335 static struct attribute_group mt_attribute_group = {
 336         .attrs = sysfs_attrs
 337 };
 338
 339 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 340 {
 341         struct mt_device *td = hid_get_drvdata(hdev);
 342         int ret, size = hid_report_len(report);
 343         u8 *buf;
 344
 345         /*
 346          * Do not fetch the feature report if the device has been explicitly
 347          * marked as non-capable.
 348          */
 349         if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS)
 350                 return;
 351
 352         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 353         if (!buf)
 354                 return;
 355
 356         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 357                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 358         if (ret < 0) {
 359                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 360                          report->id);
 361         } else {
 362                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 363                                            size, 0);
 364                 if (ret)
 365                         dev_warn(&hdev->dev, "failed to report feature\n");
 366         }
 367
 368         kfree(buf);
 369 }
 370
 371 static void mt_feature_mapping(struct hid_device *hdev,
 372                 struct hid_field *field, struct hid_usage *usage)
 373 {
 374         struct mt_device *td = hid_get_drvdata(hdev);
 375
 376         switch (usage->hid) {
 377         case HID_DG_INPUTMODE:
 378                 /* Ignore if value index is out of bounds. */
 379                 if (usage->usage_index >= field->report_count) {
 380                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 381                         break;
 382                 }
 383
 384                 if (td->inputmode < 0) {
 385                         td->inputmode = field->report->id;
 386                         td->inputmode_index = usage->usage_index;
 387                 } else {
 388                         /*
 389                          * Some elan panels wrongly declare 2 input mode
 390                          * features, and silently ignore when we set the
 391                          * value in the second field. Skip the second feature
 392                          * and hope for the best.
 393                          */
 394                         dev_info(&hdev->dev,
 395                                  "Ignoring the extra HID_DG_INPUTMODE\n");
 396                 }
 397
 398                 break;
 399         case HID_DG_CONTACTMAX:
 400                 mt_get_feature(hdev, field->report);
 401
 402                 td->maxcontact_report_id = field->report->id;
 403                 td->maxcontacts = field->value[0];
 404                 if (!td->maxcontacts &&
 405                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 406                         td->maxcontacts = field->logical_maximum;
 407                 if (td->mtclass.maxcontacts)
 408                         /* check if the maxcontacts is given by the class */
 409                         td->maxcontacts = td->mtclass.maxcontacts;
 410
 411                 break;
 412         case HID_DG_BUTTONTYPE:
 413                 if (usage->usage_index >= field->report_count) {
 414                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 415                         break;
 416                 }
 417
 418                 mt_get_feature(hdev, field->report);
 419                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 420                         td->is_buttonpad = true;
 421
 422                 break;
 423         case 0xff0000c5:
 424                 /* Retrieve the Win8 blob once to enable some devices */
 425                 if (usage->usage_index == 0)
 426                         mt_get_feature(hdev, field->report);
 427                 break;
 428         }
 429 }
 430
 431 static void set_abs(struct input_dev *input, unsigned int code,
 432                 struct hid_field *field, int snratio)
 433 {
 434         int fmin = field->logical_minimum;
 435         int fmax = field->logical_maximum;
 436         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 437         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 438         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 439 }
 440
 441 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 442                 struct hid_input *hi)
 443 {
 444         struct mt_fields *f = td->fields;
 445
 446         if (f->length >= HID_MAX_FIELDS)
 447                 return;
 448
 449         f->usages[f->length++] = usage->hid;
 450 }
 451
 452 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 453                 struct hid_field *field, struct hid_usage *usage,
 454                 unsigned long **bit, int *max)
 455 {
 456         struct mt_device *td = hid_get_drvdata(hdev);
 457         struct mt_class *cls = &td->mtclass;
 458         int code;
 459         struct hid_usage *prev_usage = NULL;
 460
 461         if (field->application == HID_DG_TOUCHSCREEN)
 462                 td->mt_flags |= INPUT_MT_DIRECT;
 463
 464         /*
 465          * Model touchscreens providing buttons as touchpads.
 466          */
 467         if (field->application == HID_DG_TOUCHPAD ||
 468             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 469                 td->mt_flags |= INPUT_MT_POINTER;
 470                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 471         }
 472
 473         /* count the buttons on touchpads */
 474         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 475                 td->buttons_count++;
 476
 477         if (usage->usage_index)
 478                 prev_usage = &field->usage[usage->usage_index - 1];
 479
 480         switch (usage->hid & HID_USAGE_PAGE) {
 481
 482         case HID_UP_GENDESK:
 483                 switch (usage->hid) {
 484                 case HID_GD_X:
 485                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 486                                 hid_map_usage(hi, usage, bit, max,
 487                                         EV_ABS, ABS_MT_TOOL_X);
 488                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
 489                                         cls->sn_move);
 490                         } else {
 491                                 hid_map_usage(hi, usage, bit, max,
 492                                         EV_ABS, ABS_MT_POSITION_X);
 493                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
 494                                         cls->sn_move);
 495                         }
 496
 497                         mt_store_field(usage, td, hi);
 498                         return 1;
 499                 case HID_GD_Y:
 500                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 501                                 hid_map_usage(hi, usage, bit, max,
 502                                         EV_ABS, ABS_MT_TOOL_Y);
 503                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
 504                                         cls->sn_move);
 505                         } else {
 506                                 hid_map_usage(hi, usage, bit, max,
 507                                         EV_ABS, ABS_MT_POSITION_Y);
 508                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
 509                                         cls->sn_move);
 510                         }
 511
 512                         mt_store_field(usage, td, hi);
 513                         return 1;
 514                 }
 515                 return 0;
 516
 517         case HID_UP_DIGITIZER:
 518                 switch (usage->hid) {
 519                 case HID_DG_INRANGE:
 520                         if (cls->quirks & MT_QUIRK_HOVERING) {
 521                                 hid_map_usage(hi, usage, bit, max,
 522                                         EV_ABS, ABS_MT_DISTANCE);
 523                                 input_set_abs_params(hi->input,
 524                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 525                         }
 526                         mt_store_field(usage, td, hi);
 527                         return 1;
 528                 case HID_DG_CONFIDENCE:
 529                         if ((cls->name == MT_CLS_WIN_8 ||
 530                                 cls->name == MT_CLS_WIN_8_DUAL) &&
 531                                 field->application == HID_DG_TOUCHPAD)
 532                                 cls->quirks |= MT_QUIRK_CONFIDENCE;
 533                         mt_store_field(usage, td, hi);
 534                         return 1;
 535                 case HID_DG_TIPSWITCH:
 536                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 537                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 538                         mt_store_field(usage, td, hi);
 539                         return 1;
 540                 case HID_DG_CONTACTID:
 541                         mt_store_field(usage, td, hi);
 542                         td->touches_by_report++;
 543                         td->mt_report_id = field->report->id;
 544                         return 1;
 545                 case HID_DG_WIDTH:
 546                         hid_map_usage(hi, usage, bit, max,
 547                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 548                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
 549                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 550                                         cls->sn_width);
 551                         mt_store_field(usage, td, hi);
 552                         return 1;
 553                 case HID_DG_HEIGHT:
 554                         hid_map_usage(hi, usage, bit, max,
 555                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 556                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 557                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 558                                         cls->sn_height);
 559                                 input_set_abs_params(hi->input,
 560                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 561                         }
 562                         mt_store_field(usage, td, hi);
 563                         return 1;
 564                 case HID_DG_TIPPRESSURE:
 565                         hid_map_usage(hi, usage, bit, max,
 566                                         EV_ABS, ABS_MT_PRESSURE);
 567                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 568                                 cls->sn_pressure);
 569                         mt_store_field(usage, td, hi);
 570                         return 1;
 571                 case HID_DG_CONTACTCOUNT:
 572                         /* Ignore if indexes are out of bounds. */
 573                         if (field->index >= field->report->maxfield ||
 574                             usage->usage_index >= field->report_count)
 575                                 return 1;
 576                         td->cc_index = field->index;
 577                         td->cc_value_index = usage->usage_index;
 578                         return 1;
 579                 case HID_DG_CONTACTMAX:
 580                         /* we don't set td->last_slot_field as contactcount and
 581                          * contact max are global to the report */
 582                         return -1;
 583                 case HID_DG_TOUCH:
 584                         /* Legacy devices use TIPSWITCH and not TOUCH.
 585                          * Let's just ignore this field. */
 586                         return -1;
 587                 }
 588                 /* let hid-input decide for the others */
 589                 return 0;
 590
 591         case HID_UP_BUTTON:
 592                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 593                 /*
 594                  * MS PTP spec says that external buttons left and right have
 595                  * usages 2 and 3.
 596                  */
 597                 if ((cls->name == MT_CLS_WIN_8 ||
 598                         cls->name == MT_CLS_WIN_8_DUAL) &&
 599                     field->application == HID_DG_TOUCHPAD &&
 600                     (usage->hid & HID_USAGE) > 1)
 601                         code--;
 602                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 603                 input_set_capability(hi->input, EV_KEY, code);
 604                 return 1;
 605
 606         case 0xff000000:
 607                 /* we do not want to map these: no input-oriented meaning */
 608                 return -1;
 609         }
 610
 611         return 0;
 612 }
 613
 614 static int mt_touch_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 615                 struct hid_field *field, struct hid_usage *usage,
 616                 unsigned long **bit, int *max)
 617 {
 618         if (usage->type == EV_KEY || usage->type == EV_ABS)
 619                 set_bit(usage->type, hi->input->evbit);
 620
 621         return -1;
 622 }
 623
 624 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 625 {
 626         __s32 quirks = td->mtclass.quirks;
 627
 628         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 629                 return td->curdata.contactid;
 630
 631         if (quirks & MT_QUIRK_CYPRESS)
 632                 return cypress_compute_slot(td);
 633
 634         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 635                 return td->num_received;
 636
 637         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 638                 return td->curdata.contactid - 1;
 639
 640         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 641 }
 642
 643 /*
 644  * this function is called when a whole contact has been processed,
 645  * so that it can assign it to a slot and store the data there
 646  */
 647 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 648 {
 649         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 650             td->num_received >= td->num_expected)
 651                 return;
 652
 653         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
 654                 int active;
 655                 int slotnum = mt_compute_slot(td, input);
 656                 struct mt_slot *s = &td->curdata;
 657                 struct input_mt *mt = input->mt;
 658
 659                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 660                         return;
 661
 662                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
 663                         struct input_mt_slot *slot = &mt->slots[slotnum];
 664                         if (input_mt_is_active(slot) &&
 665                             input_mt_is_used(mt, slot))
 666                                 return;
 667                 }
 668
 669                 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
 670                         s->confidence_state = 1;
 671                 active = (s->touch_state || s->inrange_state) &&
 672                                                         s->confidence_state;
 673
 674                 input_mt_slot(input, slotnum);
 675                 input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
 676                 if (active) {
 677                         /* this finger is in proximity of the sensor */
 678                         int wide = (s->w > s->h);
 679                         int major = max(s->w, s->h);
 680                         int minor = min(s->w, s->h);
 681
 682                         /*
 683                          * divided by two to match visual scale of touch
 684                          * for devices with this quirk
 685                          */
 686                         if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
 687                                 major = major >> 1;
 688                                 minor = minor >> 1;
 689                         }
 690
 691                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 692                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 693                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
 694                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
 695                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
 696                                 !s->touch_state);
 697                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 698                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 699                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 700                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 701                 }
 702         }
 703
 704         td->num_received++;
 705 }
 706
 707 /*
 708  * this function is called when a whole packet has been received and processed,
 709  * so that it can decide what to send to the input layer.
 710  */
 711 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 712 {
 713         input_mt_sync_frame(input);
 714         input_sync(input);
 715         td->num_received = 0;
 716 }
 717
 718 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 719                                 struct hid_usage *usage, __s32 value)
 720 {
 721         /* we will handle the hidinput part later, now remains hiddev */
 722         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 723                 hid->hiddev_hid_event(hid, field, usage, value);
 724
 725         return 1;
 726 }
 727
 728 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 729                                 struct hid_usage *usage, __s32 value)
 730 {
 731         struct mt_device *td = hid_get_drvdata(hid);
 732         __s32 quirks = td->mtclass.quirks;
 733         struct input_dev *input = field->hidinput->input;
 734
 735         if (hid->claimed & HID_CLAIMED_INPUT) {
 736                 switch (usage->hid) {
 737                 case HID_DG_INRANGE:
 738                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 739                                 td->curvalid = value;
 740                         if (quirks & MT_QUIRK_HOVERING)
 741                                 td->curdata.inrange_state = value;
 742                         break;
 743                 case HID_DG_TIPSWITCH:
 744                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 745                                 td->curvalid = value;
 746                         td->curdata.touch_state = value;
 747                         break;
 748                 case HID_DG_CONFIDENCE:
 749                         if (quirks & MT_QUIRK_CONFIDENCE)
 750                                 td->curdata.confidence_state = value;
 751                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 752                                 td->curvalid = value;
 753                         break;
 754                 case HID_DG_CONTACTID:
 755                         td->curdata.contactid = value;
 756                         break;
 757                 case HID_DG_TIPPRESSURE:
 758                         td->curdata.p = value;
 759                         break;
 760                 case HID_GD_X:
 761                         if (usage->code == ABS_MT_TOOL_X)
 762                                 td->curdata.cx = value;
 763                         else
 764                                 td->curdata.x = value;
 765                         break;
 766                 case HID_GD_Y:
 767                         if (usage->code == ABS_MT_TOOL_Y)
 768                                 td->curdata.cy = value;
 769                         else
 770                                 td->curdata.y = value;
 771                         break;
 772                 case HID_DG_WIDTH:
 773                         td->curdata.w = value;
 774                         break;
 775                 case HID_DG_HEIGHT:
 776                         td->curdata.h = value;
 777                         break;
 778                 case HID_DG_CONTACTCOUNT:
 779                         break;
 780                 case HID_DG_TOUCH:
 781                         /* do nothing */
 782                         break;
 783
 784                 default:
 785                         if (usage->type)
 786                                 input_event(input, usage->type, usage->code,
 787                                                 value);
 788                         return;
 789                 }
 790
 791                 if (usage->usage_index + 1 == field->report_count) {
 792                         /* we only take into account the last report. */
 793                         if (usage->hid == td->last_slot_field)
 794                                 mt_complete_slot(td, field->hidinput->input);
 795                 }
 796
 797         }
 798 }
 799
 800 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
 801 {
 802         struct mt_device *td = hid_get_drvdata(hid);
 803         struct hid_field *field;
 804         unsigned count;
 805         int r, n;
 806
 807         /*
 808          * Includes multi-packet support where subsequent
 809          * packets are sent with zero contactcount.
 810          */
 811         if (td->cc_index >= 0) {
 812                 struct hid_field *field = report->field[td->cc_index];
 813                 int value = field->value[td->cc_value_index];
 814                 if (value)
 815                         td->num_expected = value;
 816         }
 817
 818         for (r = 0; r < report->maxfield; r++) {
 819                 field = report->field[r];
 820                 count = field->report_count;
 821
 822                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 823                         continue;
 824
 825                 for (n = 0; n < count; n++)
 826                         mt_process_mt_event(hid, field, &field->usage[n],
 827                                         field->value[n]);
 828         }
 829
 830         if (td->num_received >= td->num_expected)
 831                 mt_sync_frame(td, report->field[0]->hidinput->input);
 832 }
 833
 834 static int mt_touch_input_configured(struct hid_device *hdev,
 835                                         struct hid_input *hi)
 836 {
 837         struct mt_device *td = hid_get_drvdata(hdev);
 838         struct mt_class *cls = &td->mtclass;
 839         struct input_dev *input = hi->input;
 840         int ret;
 841
 842         if (!td->maxcontacts)
 843                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 844
 845         mt_post_parse(td);
 846         if (td->serial_maybe)
 847                 mt_post_parse_default_settings(td);
 848
 849         if (cls->is_indirect)
 850                 td->mt_flags |= INPUT_MT_POINTER;
 851
 852         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 853                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 854
 855         /* check for clickpads */
 856         if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
 857                 td->is_buttonpad = true;
 858
 859         if (td->is_buttonpad)
 860                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 861
 862         ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 863         if (ret)
 864                 return ret;
 865
 866         td->mt_flags = 0;
 867         return 0;
 868 }
 869
 870 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 871                 struct hid_field *field, struct hid_usage *usage,
 872                 unsigned long **bit, int *max)
 873 {
 874         struct mt_device *td = hid_get_drvdata(hdev);
 875
 876         /*
 877          * If mtclass.export_all_inputs is not set, only map fields from
 878          * TouchScreen or TouchPad collections. We need to ignore fields
 879          * that belong to other collections such as Mouse that might have
 880          * the same GenericDesktop usages.
 881          */
 882         if (!td->mtclass.export_all_inputs &&
 883             field->application != HID_DG_TOUCHSCREEN &&
 884             field->application != HID_DG_PEN &&
 885             field->application != HID_DG_TOUCHPAD &&
 886             field->application != HID_GD_KEYBOARD &&
 887             field->application != HID_CP_CONSUMER_CONTROL)
 888                 return -1;
 889
 890         /*
 891          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
 892          * for the stylus.
 893          * The check for mt_report_id ensures we don't process
 894          * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
 895          * collection, but within the report ID.
 896          */
 897         if (field->physical == HID_DG_STYLUS)
 898                 return 0;
 899         else if ((field->physical == 0) &&
 900                  (field->report->id != td->mt_report_id) &&
 901                  (td->mt_report_id != -1))
 902                 return 0;
 903
 904         if (field->application == HID_DG_TOUCHSCREEN ||
 905             field->application == HID_DG_TOUCHPAD)
 906                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
 907
 908         /* let hid-core decide for the others */
 909         return 0;
 910 }
 911
 912 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 913                 struct hid_field *field, struct hid_usage *usage,
 914                 unsigned long **bit, int *max)
 915 {
 916         /*
 917          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
 918          * for the stylus.
 919          */
 920         if (field->physical == HID_DG_STYLUS)
 921                 return 0;
 922
 923         if (field->application == HID_DG_TOUCHSCREEN ||
 924             field->application == HID_DG_TOUCHPAD)
 925                 return mt_touch_input_mapped(hdev, hi, field, usage, bit, max);
 926
 927         /* let hid-core decide for the others */
 928         return 0;
 929 }
 930
 931 static int mt_event(struct hid_device *hid, struct hid_field *field,
 932                                 struct hid_usage *usage, __s32 value)
 933 {
 934         struct mt_device *td = hid_get_drvdata(hid);
 935
 936         if (field->report->id == td->mt_report_id)
 937                 return mt_touch_event(hid, field, usage, value);
 938
 939         return 0;
 940 }
 941
 942 static void mt_report(struct hid_device *hid, struct hid_report *report)
 943 {
 944         struct mt_device *td = hid_get_drvdata(hid);
 945         struct hid_field *field = report->field[0];
 946
 947         if (!(hid->claimed & HID_CLAIMED_INPUT))
 948                 return;
 949
 950         if (report->id == td->mt_report_id)
 951                 return mt_touch_report(hid, report);
 952
 953         if (field && field->hidinput && field->hidinput->input)
 954                 input_sync(field->hidinput->input);
 955 }
 956
 957 static void mt_set_input_mode(struct hid_device *hdev)
 958 {
 959         struct mt_device *td = hid_get_drvdata(hdev);
 960         struct hid_report *r;
 961         struct hid_report_enum *re;
 962         struct mt_class *cls = &td->mtclass;
 963         char *buf;
 964         int report_len;
 965
 966         if (td->inputmode < 0)
 967                 return;
 968
 969         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 970         r = re->report_id_hash[td->inputmode];
 971         if (r) {
 972                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
 973                         report_len = hid_report_len(r);
 974                         buf = hid_alloc_report_buf(r, GFP_KERNEL);
 975                         if (!buf) {
 976                                 hid_err(hdev, "failed to allocate buffer for report\n");
 977                                 return;
 978                         }
 979                         hid_hw_raw_request(hdev, r->id, buf, report_len,
 980                                            HID_FEATURE_REPORT,
 981                                            HID_REQ_GET_REPORT);
 982                         kfree(buf);
 983                 }
 984                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
 985                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
 986         }
 987 }
 988
 989 static void mt_set_maxcontacts(struct hid_device *hdev)
 990 {
 991         struct mt_device *td = hid_get_drvdata(hdev);
 992         struct hid_report *r;
 993         struct hid_report_enum *re;
 994         int fieldmax, max;
 995
 996         if (td->maxcontact_report_id < 0)
 997                 return;
 998
 999         if (!td->mtclass.maxcontacts)
1000                 return;
1001
1002         re = &hdev->report_enum[HID_FEATURE_REPORT];
1003         r = re->report_id_hash[td->maxcontact_report_id];
1004         if (r) {
1005                 max = td->mtclass.maxcontacts;
1006                 fieldmax = r->field[0]->logical_maximum;
1007                 max = min(fieldmax, max);
1008                 if (r->field[0]->value[0] != max) {
1009                         r->field[0]->value[0] = max;
1010                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1011                 }
1012         }
1013 }
1014
1015 static void mt_post_parse_default_settings(struct mt_device *td)
1016 {
1017         __s32 quirks = td->mtclass.quirks;
1018
1019         /* unknown serial device needs special quirks */
1020         if (td->touches_by_report == 1) {
1021                 quirks |= MT_QUIRK_ALWAYS_VALID;
1022                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1023                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1024                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1025                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1026         }
1027
1028         td->mtclass.quirks = quirks;
1029 }
1030
1031 static void mt_post_parse(struct mt_device *td)
1032 {
1033         struct mt_fields *f = td->fields;
1034         struct mt_class *cls = &td->mtclass;
1035
1036         if (td->touches_by_report > 0) {
1037                 int field_count_per_touch = f->length / td->touches_by_report;
1038                 td->last_slot_field = f->usages[field_count_per_touch - 1];
1039         }
1040
1041         if (td->cc_index < 0)
1042                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1043 }
1044
1045 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1046 {
1047         struct mt_device *td = hid_get_drvdata(hdev);
1048         char *name;
1049         const char *suffix = NULL;
1050         struct hid_field *field = hi->report->field[0];
1051         int ret;
1052
1053         if (hi->report->id == td->mt_report_id) {
1054                 ret = mt_touch_input_configured(hdev, hi);
1055                 if (ret)
1056                         return ret;
1057         }
1058
1059         /*
1060          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1061          * for the stylus. Check this first, and then rely on the application
1062          * field.
1063          */
1064         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1065                 suffix = "Pen";
1066                 /* force BTN_STYLUS to allow tablet matching in udev */
1067                 __set_bit(BTN_STYLUS, hi->input->keybit);
1068         } else {
1069                 switch (field->application) {
1070                 case HID_GD_KEYBOARD:
1071                         suffix = "Keyboard";
1072                         break;
1073                 case HID_GD_KEYPAD:
1074                         suffix = "Keypad";
1075                         break;
1076                 case HID_GD_MOUSE:
1077                         suffix = "Mouse";
1078                         break;
1079                 case HID_DG_STYLUS:
1080                         suffix = "Pen";
1081                         /* force BTN_STYLUS to allow tablet matching in udev */
1082                         __set_bit(BTN_STYLUS, hi->input->keybit);
1083                         break;
1084                 case HID_DG_TOUCHSCREEN:
1085                         /* we do not set suffix = "Touchscreen" */
1086                         break;
1087                 case HID_DG_TOUCHPAD:
1088                         suffix = "Touchpad";
1089                         break;
1090                 case HID_GD_SYSTEM_CONTROL:
1091                         suffix = "System Control";
1092                         break;
1093                 case HID_CP_CONSUMER_CONTROL:
1094                         suffix = "Consumer Control";
1095                         break;
1096                 default:
1097                         suffix = "UNKNOWN";
1098                         break;
1099                 }
1100         }
1101
1102         if (suffix) {
1103                 name = devm_kzalloc(&hi->input->dev,
1104                                     strlen(hdev->name) + strlen(suffix) + 2,
1105                                     GFP_KERNEL);
1106                 if (name) {
1107                         sprintf(name, "%s %s", hdev->name, suffix);
1108                         hi->input->name = name;
1109                 }
1110         }
1111
1112         return 0;
1113 }
1114
1115 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1116 {
1117         if (field->usage[0].hid != usage ||
1118             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1119                 return;
1120
1121         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1122         field->flags |= HID_MAIN_ITEM_VARIABLE;
1123 }
1124
1125 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1126 {
1127         struct hid_report *report;
1128         int i;
1129
1130         list_for_each_entry(report,
1131                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1132                             list) {
1133
1134                 if (!report->maxfield)
1135                         continue;
1136
1137                 for (i = 0; i < report->maxfield; i++)
1138                         if (report->field[i]->maxusage >= 1)
1139                                 mt_fix_const_field(report->field[i], usage);
1140         }
1141 }
1142
1143 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1144 {
1145         int ret, i;
1146         struct mt_device *td;
1147         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1148
1149         for (i = 0; mt_classes[i].name ; i++) {
1150                 if (id->driver_data == mt_classes[i].name) {
1151                         mtclass = &(mt_classes[i]);
1152                         break;
1153                 }
1154         }
1155
1156         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1157         if (!td) {
1158                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1159                 return -ENOMEM;
1160         }
1161         td->mtclass = *mtclass;
1162         td->inputmode = -1;
1163         td->maxcontact_report_id = -1;
1164         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1165         td->cc_index = -1;
1166         td->mt_report_id = -1;
1167         hid_set_drvdata(hdev, td);
1168
1169         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1170                                   GFP_KERNEL);
1171         if (!td->fields) {
1172                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1173                 return -ENOMEM;
1174         }
1175
1176         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1177                 td->serial_maybe = true;
1178
1179         /*
1180          * Store the initial quirk state
1181          */
1182         td->initial_quirks = hdev->quirks;
1183
1184         /* This allows the driver to correctly support devices
1185          * that emit events over several HID messages.
1186          */
1187         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1188
1189         /*
1190          * This allows the driver to handle different input sensors
1191          * that emits events through different reports on the same HID
1192          * device.
1193          */
1194         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1195         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1196
1197         /*
1198          * Some multitouch screens do not like to be polled for input
1199          * reports. Fortunately, the Win8 spec says that all touches
1200          * should be sent during each report, making the initialization
1201          * of input reports unnecessary. For Win7 devices, well, let's hope
1202          * they will still be happy (this is only be a problem if a touch
1203          * was already there while probing the device).
1204          *
1205          * In addition some touchpads do not behave well if we read
1206          * all feature reports from them. Instead we prevent
1207          * initial report fetching and then selectively fetch each
1208          * report we are interested in.
1209          */
1210         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1211
1212         ret = hid_parse(hdev);
1213         if (ret != 0)
1214                 return ret;
1215
1216         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1217                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1218
1219         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1220         if (ret)
1221                 return ret;
1222
1223         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1224         if (ret)
1225                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1226                                 hdev->name);
1227
1228         mt_set_maxcontacts(hdev);
1229         mt_set_input_mode(hdev);
1230
1231         /* release .fields memory as it is not used anymore */
1232         devm_kfree(&hdev->dev, td->fields);
1233         td->fields = NULL;
1234
1235         return 0;
1236 }
1237
1238 #ifdef CONFIG_PM
1239 static void mt_release_contacts(struct hid_device *hid)
1240 {
1241         struct hid_input *hidinput;
1242
1243         list_for_each_entry(hidinput, &hid->inputs, list) {
1244                 struct input_dev *input_dev = hidinput->input;
1245                 struct input_mt *mt = input_dev->mt;
1246                 int i;
1247
1248                 if (mt) {
1249                         for (i = 0; i < mt->num_slots; i++) {
1250                                 input_mt_slot(input_dev, i);
1251                                 input_mt_report_slot_state(input_dev,
1252                                                            MT_TOOL_FINGER,
1253                                                            false);
1254                         }
1255                         input_mt_sync_frame(input_dev);
1256                         input_sync(input_dev);
1257                 }
1258         }
1259 }
1260
1261 static int mt_reset_resume(struct hid_device *hdev)
1262 {
1263         mt_release_contacts(hdev);
1264         mt_set_maxcontacts(hdev);
1265         mt_set_input_mode(hdev);
1266         return 0;
1267 }
1268
1269 static int mt_resume(struct hid_device *hdev)
1270 {
1271         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1272          * It should be safe to send it to other devices too.
1273          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1274
1275         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1276
1277         return 0;
1278 }
1279 #endif
1280
1281 static void mt_remove(struct hid_device *hdev)
1282 {
1283         struct mt_device *td = hid_get_drvdata(hdev);
1284
1285         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1286         hid_hw_stop(hdev);
1287         hdev->quirks = td->initial_quirks;
1288 }
1289
1290 /*
1291  * This list contains only:
1292  * - VID/PID of products not working with the default multitouch handling
1293  * - 2 generic rules.
1294  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1295  */
1296 static const struct hid_device_id mt_devices[] = {
1297
1298         /* 3M panels */
1299         { .driver_data = MT_CLS_3M,
1300                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1301                         USB_DEVICE_ID_3M1968) },
1302         { .driver_data = MT_CLS_3M,
1303                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1304                         USB_DEVICE_ID_3M2256) },
1305         { .driver_data = MT_CLS_3M,
1306                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1307                         USB_DEVICE_ID_3M3266) },
1308
1309         /* Alps devices */
1310         { .driver_data = MT_CLS_WIN_8_DUAL,
1311                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1312                         USB_VENDOR_ID_ALPS_JP,
1313                         HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1314         { .driver_data = MT_CLS_WIN_8_DUAL,
1315                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1316                         USB_VENDOR_ID_ALPS_JP,
1317                         HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1318
1319         /* Anton devices */
1320         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1321                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1322                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1323
1324         /* Atmel panels */
1325         { .driver_data = MT_CLS_SERIAL,
1326                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1327                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1328
1329         /* Baanto multitouch devices */
1330         { .driver_data = MT_CLS_NSMU,
1331                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1332                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1333
1334         /* Cando panels */
1335         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1336                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1337                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1338         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1339                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1340                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1341
1342         /* Chunghwa Telecom touch panels */
1343         {  .driver_data = MT_CLS_NSMU,
1344                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1345                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1346
1347         /* CJTouch panels */
1348         { .driver_data = MT_CLS_NSMU,
1349                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1350                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1351         { .driver_data = MT_CLS_NSMU,
1352                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1353                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1354
1355         /* CVTouch panels */
1356         { .driver_data = MT_CLS_NSMU,
1357                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1358                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1359
1360         /* eGalax devices (resistive) */
1361         { .driver_data = MT_CLS_EGALAX,
1362                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1363                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1364         { .driver_data = MT_CLS_EGALAX,
1365                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1366                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1367
1368         /* eGalax devices (capacitive) */
1369         { .driver_data = MT_CLS_EGALAX_SERIAL,
1370                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1371                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1372         { .driver_data = MT_CLS_EGALAX,
1373                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1374                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1375         { .driver_data = MT_CLS_EGALAX_SERIAL,
1376                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1377                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1378         { .driver_data = MT_CLS_EGALAX_SERIAL,
1379                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1380                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1381         { .driver_data = MT_CLS_EGALAX_SERIAL,
1382                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1383                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1384         { .driver_data = MT_CLS_EGALAX_SERIAL,
1385                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1386                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1387         { .driver_data = MT_CLS_EGALAX,
1388                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1389                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1390         { .driver_data = MT_CLS_EGALAX,
1391                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1392                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1393         { .driver_data = MT_CLS_EGALAX_SERIAL,
1394                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1395                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1396         { .driver_data = MT_CLS_EGALAX,
1397                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1398                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1399         { .driver_data = MT_CLS_EGALAX,
1400                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1401                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1402         { .driver_data = MT_CLS_EGALAX,
1403                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1404                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1405         { .driver_data = MT_CLS_EGALAX,
1406                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1407                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1408         { .driver_data = MT_CLS_EGALAX_SERIAL,
1409                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1410                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1411         { .driver_data = MT_CLS_EGALAX_SERIAL,
1412                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1413                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1414         { .driver_data = MT_CLS_EGALAX_SERIAL,
1415                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1416                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1417
1418         /* Elitegroup panel */
1419         { .driver_data = MT_CLS_SERIAL,
1420                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1421                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1422
1423         /* Flatfrog Panels */
1424         { .driver_data = MT_CLS_FLATFROG,
1425                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1426                         USB_DEVICE_ID_MULTITOUCH_3200) },
1427
1428         /* FocalTech Panels */
1429         { .driver_data = MT_CLS_SERIAL,
1430                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1431                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1432
1433         /* GeneralTouch panel */
1434         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1435                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1436                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1437         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1438                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1439                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1440         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1441                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1442                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1443         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1444                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1445                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1446         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1447                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1448                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1449         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1450                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1451                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1452         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1453                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1454                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1455
1456         /* Gametel game controller */
1457         { .driver_data = MT_CLS_NSMU,
1458                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1459                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1460
1461         /* GoodTouch panels */
1462         { .driver_data = MT_CLS_NSMU,
1463                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1464                         USB_DEVICE_ID_GOODTOUCH_000f) },
1465
1466         /* Hanvon panels */
1467         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1468                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1469                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1470
1471         /* Ilitek dual touch panel */
1472         {  .driver_data = MT_CLS_NSMU,
1473                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1474                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1475
1476         /* LG Melfas panel */
1477         { .driver_data = MT_CLS_LG,
1478                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1479                         USB_DEVICE_ID_LG_MELFAS_MT) },
1480
1481         /* MosArt panels */
1482         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1483                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1484                         USB_DEVICE_ID_ASUS_T91MT)},
1485         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1486                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1487                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1488         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1489                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1490                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1491
1492         /* Panasonic panels */
1493         { .driver_data = MT_CLS_PANASONIC,
1494                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1495                         USB_DEVICE_ID_PANABOARD_UBT780) },
1496         { .driver_data = MT_CLS_PANASONIC,
1497                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1498                         USB_DEVICE_ID_PANABOARD_UBT880) },
1499
1500         /* Novatek Panel */
1501         { .driver_data = MT_CLS_NSMU,
1502                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1503                         USB_DEVICE_ID_NOVATEK_PCT) },
1504
1505         /* Ntrig Panel */
1506         { .driver_data = MT_CLS_NSMU,
1507                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1508                         USB_VENDOR_ID_NTRIG, 0x1b05) },
1509
1510         /* PixArt optical touch screen */
1511         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1512                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1513                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1514         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1515                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1516                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1517         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1518                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1519                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1520
1521         /* PixCir-based panels */
1522         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1523                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1524                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1525
1526         /* Quanta-based panels */
1527         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1528                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1529                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1530
1531         /* Stantum panels */
1532         { .driver_data = MT_CLS_CONFIDENCE,
1533                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1534                         USB_DEVICE_ID_MTP_STM)},
1535
1536         /* TopSeed panels */
1537         { .driver_data = MT_CLS_TOPSEED,
1538                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1539                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1540
1541         /* Touch International panels */
1542         { .driver_data = MT_CLS_NSMU,
1543                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1544                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1545
1546         /* Unitec panels */
1547         { .driver_data = MT_CLS_NSMU,
1548                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1549                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1550         { .driver_data = MT_CLS_NSMU,
1551                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1552                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1553
1554         /* VTL panels */
1555         { .driver_data = MT_CLS_VTL,
1556                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1557                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1558
1559         /* Wistron panels */
1560         { .driver_data = MT_CLS_NSMU,
1561                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1562                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1563
1564         /* XAT */
1565         { .driver_data = MT_CLS_NSMU,
1566                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1567                         USB_DEVICE_ID_XAT_CSR) },
1568
1569         /* Xiroku */
1570         { .driver_data = MT_CLS_NSMU,
1571                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1572                         USB_DEVICE_ID_XIROKU_SPX) },
1573         { .driver_data = MT_CLS_NSMU,
1574                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1575                         USB_DEVICE_ID_XIROKU_MPX) },
1576         { .driver_data = MT_CLS_NSMU,
1577                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1578                         USB_DEVICE_ID_XIROKU_CSR) },
1579         { .driver_data = MT_CLS_NSMU,
1580                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1581                         USB_DEVICE_ID_XIROKU_SPX1) },
1582         { .driver_data = MT_CLS_NSMU,
1583                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1584                         USB_DEVICE_ID_XIROKU_MPX1) },
1585         { .driver_data = MT_CLS_NSMU,
1586                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1587                         USB_DEVICE_ID_XIROKU_CSR1) },
1588         { .driver_data = MT_CLS_NSMU,
1589                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1590                         USB_DEVICE_ID_XIROKU_SPX2) },
1591         { .driver_data = MT_CLS_NSMU,
1592                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1593                         USB_DEVICE_ID_XIROKU_MPX2) },
1594         { .driver_data = MT_CLS_NSMU,
1595                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1596                         USB_DEVICE_ID_XIROKU_CSR2) },
1597
1598         /* Google MT devices */
1599         { .driver_data = MT_CLS_GOOGLE,
1600                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
1601                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
1602
1603         /* Generic MT device */
1604         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1605
1606         /* Generic Win 8 certified MT device */
1607         {  .driver_data = MT_CLS_WIN_8,
1608                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1609                         HID_ANY_ID, HID_ANY_ID) },
1610         { }
1611 };
1612 MODULE_DEVICE_TABLE(hid, mt_devices);
1613
1614 static const struct hid_usage_id mt_grabbed_usages[] = {
1615         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1616         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1617 };
1618
1619 static struct hid_driver mt_driver = {
1620         .name = "hid-multitouch",
1621         .id_table = mt_devices,
1622         .probe = mt_probe,
1623         .remove = mt_remove,
1624         .input_mapping = mt_input_mapping,
1625         .input_mapped = mt_input_mapped,
1626         .input_configured = mt_input_configured,
1627         .feature_mapping = mt_feature_mapping,
1628         .usage_table = mt_grabbed_usages,
1629         .event = mt_event,
1630         .report = mt_report,
1631 #ifdef CONFIG_PM
1632         .reset_resume = mt_reset_resume,
1633         .resume = mt_resume,
1634 #endif
1635 };
1636 module_hid_driver(mt_driver);