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/jiffies.h>
  47 #include <linux/string.h>
  48 #include <linux/timer.h>
  49
  50
  51 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  52 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  53 MODULE_DESCRIPTION("HID multitouch panels");
  54 MODULE_LICENSE("GPL");
  55
  56 #include "hid-ids.h"
  57
  58 /* quirks to control the device */
  59 #define MT_QUIRK_NOT_SEEN_MEANS_UP      BIT(0)
  60 #define MT_QUIRK_SLOT_IS_CONTACTID      BIT(1)
  61 #define MT_QUIRK_CYPRESS                BIT(2)
  62 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
  63 #define MT_QUIRK_ALWAYS_VALID           BIT(4)
  64 #define MT_QUIRK_VALID_IS_INRANGE       BIT(5)
  65 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
  66 #define MT_QUIRK_CONFIDENCE             BIT(7)
  67 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
  68 #define MT_QUIRK_NO_AREA                BIT(9)
  69 #define MT_QUIRK_IGNORE_DUPLICATES      BIT(10)
  70 #define MT_QUIRK_HOVERING               BIT(11)
  71 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
  72 #define MT_QUIRK_FORCE_GET_FEATURE      BIT(13)
  73 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
  74 #define MT_QUIRK_TOUCH_SIZE_SCALING     BIT(15)
  75 #define MT_QUIRK_STICKY_FINGERS         BIT(16)
  76 #define MT_QUIRK_ASUS_CUSTOM_UP         BIT(17)
  77
  78 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  79 #define MT_INPUTMODE_TOUCHPAD           0x03
  80
  81 #define MT_BUTTONTYPE_CLICKPAD          0
  82
  83 #define MT_IO_FLAGS_RUNNING             0
  84 #define MT_IO_FLAGS_ACTIVE_SLOTS        1
  85 #define MT_IO_FLAGS_PENDING_SLOTS       2
  86
  87 struct mt_slot {
  88         __s32 x, y, cx, cy, p, w, h;
  89         __s32 contactid;        /* the device ContactID assigned to this slot */
  90         bool touch_state;       /* is the touch valid? */
  91         bool inrange_state;     /* is the finger in proximity of the sensor? */
  92         bool confidence_state;  /* is the touch made by a finger? */
  93 };
  94
  95 struct mt_class {
  96         __s32 name;     /* MT_CLS */
  97         __s32 quirks;
  98         __s32 sn_move;  /* Signal/noise ratio for move events */
  99         __s32 sn_width; /* Signal/noise ratio for width events */
 100         __s32 sn_height;        /* Signal/noise ratio for height events */
 101         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 102         __u8 maxcontacts;
 103         bool is_indirect;       /* true for touchpads */
 104         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 105 };
 106
 107 struct mt_fields {
 108         unsigned usages[HID_MAX_FIELDS];
 109         unsigned int length;
 110 };
 111
 112 struct mt_device {
 113         struct mt_slot curdata; /* placeholder of incoming data */
 114         struct mt_class mtclass;        /* our mt device class */
 115         struct timer_list release_timer;        /* to release sticky fingers */
 116         struct hid_device *hdev;        /* hid_device we're attached to */
 117         struct mt_fields *fields;       /* temporary placeholder for storing the
 118                                            multitouch fields */
 119         unsigned long mt_io_flags;      /* mt flags (MT_IO_FLAGS_*) */
 120         int cc_index;   /* contact count field index in the report */
 121         int cc_value_index;     /* contact count value index in the field */
 122         unsigned last_slot_field;       /* the last field of a slot */
 123         unsigned mt_report_id;  /* the report ID of the multitouch device */
 124         unsigned long initial_quirks;   /* initial quirks state */
 125         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
 126         __s16 inputmode_index;  /* InputMode HID feature index in the report */
 127         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
 128                                    -1 if non-existent */
 129         __u8 inputmode_value;  /* InputMode HID feature value */
 130         __u8 num_received;      /* how many contacts we received */
 131         __u8 num_expected;      /* expected last contact index */
 132         __u8 maxcontacts;
 133         __u8 touches_by_report; /* how many touches are present in one report:
 134                                 * 1 means we should use a serial protocol
 135                                 * > 1 means hybrid (multitouch) protocol */
 136         __u8 buttons_count;     /* number of physical buttons per touchpad */
 137         bool is_buttonpad;      /* is this device a button pad? */
 138         bool serial_maybe;      /* need to check for serial protocol */
 139         bool curvalid;          /* is the current contact valid? */
 140         unsigned mt_flags;      /* flags to pass to input-mt */
 141         __s32 dev_time;         /* the scan time provided by the device */
 142         unsigned long jiffies;  /* the frame's jiffies */
 143         int timestamp;          /* the timestamp to be sent */
 144 };
 145
 146 static void mt_post_parse_default_settings(struct mt_device *td);
 147 static void mt_post_parse(struct mt_device *td);
 148
 149 /* classes of device behavior */
 150 #define MT_CLS_DEFAULT                          0x0001
 151
 152 #define MT_CLS_SERIAL                           0x0002
 153 #define MT_CLS_CONFIDENCE                       0x0003
 154 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 155 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 156 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 157 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 158 /* reserved                                     0x0008 */
 159 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 160 #define MT_CLS_NSMU                             0x000a
 161 /* reserved                                     0x0010 */
 162 /* reserved                                     0x0011 */
 163 #define MT_CLS_WIN_8                            0x0012
 164 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 165 #define MT_CLS_WIN_8_DUAL                       0x0014
 166
 167 /* vendor specific classes */
 168 #define MT_CLS_3M                               0x0101
 169 /* reserved                                     0x0102 */
 170 #define MT_CLS_EGALAX                           0x0103
 171 #define MT_CLS_EGALAX_SERIAL                    0x0104
 172 #define MT_CLS_TOPSEED                          0x0105
 173 #define MT_CLS_PANASONIC                        0x0106
 174 #define MT_CLS_FLATFROG                         0x0107
 175 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 176 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 177 #define MT_CLS_LG                               0x010a
 178 #define MT_CLS_ASUS                             0x010b
 179 #define MT_CLS_VTL                              0x0110
 180 #define MT_CLS_GOOGLE                           0x0111
 181
 182 #define MT_DEFAULT_MAXCONTACT   10
 183 #define MT_MAX_MAXCONTACT       250
 184
 185 /*
 186  * Resync device and local timestamps after that many microseconds without
 187  * receiving data.
 188  */
 189 #define MAX_TIMESTAMP_INTERVAL  1000000
 190
 191 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 192 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 193
 194 /*
 195  * these device-dependent functions determine what slot corresponds
 196  * to a valid contact that was just read.
 197  */
 198
 199 static int cypress_compute_slot(struct mt_device *td)
 200 {
 201         if (td->curdata.contactid != 0 || td->num_received == 0)
 202                 return td->curdata.contactid;
 203         else
 204                 return -1;
 205 }
 206
 207 static struct mt_class mt_classes[] = {
 208         { .name = MT_CLS_DEFAULT,
 209                 .quirks = MT_QUIRK_ALWAYS_VALID |
 210                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 211         { .name = MT_CLS_NSMU,
 212                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 213         { .name = MT_CLS_SERIAL,
 214                 .quirks = MT_QUIRK_ALWAYS_VALID},
 215         { .name = MT_CLS_CONFIDENCE,
 216                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 217         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 218                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 219                         MT_QUIRK_SLOT_IS_CONTACTID },
 220         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 221                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 222                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 223         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 224                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 225                         MT_QUIRK_SLOT_IS_CONTACTID,
 226                 .maxcontacts = 2 },
 227         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 228                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 229                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 230                 .maxcontacts = 2 },
 231         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 232                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 233                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 234         { .name = MT_CLS_WIN_8,
 235                 .quirks = MT_QUIRK_ALWAYS_VALID |
 236                         MT_QUIRK_IGNORE_DUPLICATES |
 237                         MT_QUIRK_HOVERING |
 238                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 239                         MT_QUIRK_STICKY_FINGERS },
 240         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 241                 .quirks = MT_QUIRK_ALWAYS_VALID |
 242                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 243                 .export_all_inputs = true },
 244         { .name = MT_CLS_WIN_8_DUAL,
 245                 .quirks = MT_QUIRK_ALWAYS_VALID |
 246                         MT_QUIRK_IGNORE_DUPLICATES |
 247                         MT_QUIRK_HOVERING |
 248                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 249                 .export_all_inputs = true },
 250
 251         /*
 252          * vendor specific classes
 253          */
 254         { .name = MT_CLS_3M,
 255                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 256                         MT_QUIRK_SLOT_IS_CONTACTID |
 257                         MT_QUIRK_TOUCH_SIZE_SCALING,
 258                 .sn_move = 2048,
 259                 .sn_width = 128,
 260                 .sn_height = 128,
 261                 .maxcontacts = 60,
 262         },
 263         { .name = MT_CLS_EGALAX,
 264                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 265                         MT_QUIRK_VALID_IS_INRANGE,
 266                 .sn_move = 4096,
 267                 .sn_pressure = 32,
 268         },
 269         { .name = MT_CLS_EGALAX_SERIAL,
 270                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 271                         MT_QUIRK_ALWAYS_VALID,
 272                 .sn_move = 4096,
 273                 .sn_pressure = 32,
 274         },
 275         { .name = MT_CLS_TOPSEED,
 276                 .quirks = MT_QUIRK_ALWAYS_VALID,
 277                 .is_indirect = true,
 278                 .maxcontacts = 2,
 279         },
 280         { .name = MT_CLS_PANASONIC,
 281                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 282                 .maxcontacts = 4 },
 283         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 284                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 285                         MT_QUIRK_VALID_IS_INRANGE |
 286                         MT_QUIRK_SLOT_IS_CONTACTID,
 287                 .maxcontacts = 2
 288         },
 289         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 290                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 291                         MT_QUIRK_SLOT_IS_CONTACTID
 292         },
 293
 294         { .name = MT_CLS_FLATFROG,
 295                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 296                         MT_QUIRK_NO_AREA,
 297                 .sn_move = 2048,
 298                 .maxcontacts = 40,
 299         },
 300         { .name = MT_CLS_LG,
 301                 .quirks = MT_QUIRK_ALWAYS_VALID |
 302                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 303                         MT_QUIRK_IGNORE_DUPLICATES |
 304                         MT_QUIRK_HOVERING |
 305                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 306         { .name = MT_CLS_ASUS,
 307                 .quirks = MT_QUIRK_ALWAYS_VALID |
 308                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 309                         MT_QUIRK_ASUS_CUSTOM_UP },
 310         { .name = MT_CLS_VTL,
 311                 .quirks = MT_QUIRK_ALWAYS_VALID |
 312                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 313                         MT_QUIRK_FORCE_GET_FEATURE,
 314         },
 315         { .name = MT_CLS_GOOGLE,
 316                 .quirks = MT_QUIRK_ALWAYS_VALID |
 317                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 318                         MT_QUIRK_SLOT_IS_CONTACTID |
 319                         MT_QUIRK_HOVERING
 320         },
 321         { }
 322 };
 323
 324 static ssize_t mt_show_quirks(struct device *dev,
 325                            struct device_attribute *attr,
 326                            char *buf)
 327 {
 328         struct hid_device *hdev = to_hid_device(dev);
 329         struct mt_device *td = hid_get_drvdata(hdev);
 330
 331         return sprintf(buf, "%u\n", td->mtclass.quirks);
 332 }
 333
 334 static ssize_t mt_set_quirks(struct device *dev,
 335                           struct device_attribute *attr,
 336                           const char *buf, size_t count)
 337 {
 338         struct hid_device *hdev = to_hid_device(dev);
 339         struct mt_device *td = hid_get_drvdata(hdev);
 340
 341         unsigned long val;
 342
 343         if (kstrtoul(buf, 0, &val))
 344                 return -EINVAL;
 345
 346         td->mtclass.quirks = val;
 347
 348         if (td->cc_index < 0)
 349                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 350
 351         return count;
 352 }
 353
 354 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 355
 356 static struct attribute *sysfs_attrs[] = {
 357         &dev_attr_quirks.attr,
 358         NULL
 359 };
 360
 361 static const struct attribute_group mt_attribute_group = {
 362         .attrs = sysfs_attrs
 363 };
 364
 365 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 366 {
 367         struct mt_device *td = hid_get_drvdata(hdev);
 368         int ret, size = hid_report_len(report);
 369         u8 *buf;
 370
 371         /*
 372          * Do not fetch the feature report if the device has been explicitly
 373          * marked as non-capable.
 374          */
 375         if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS)
 376                 return;
 377
 378         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 379         if (!buf)
 380                 return;
 381
 382         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 383                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 384         if (ret < 0) {
 385                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 386                          report->id);
 387         } else {
 388                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 389                                            size, 0);
 390                 if (ret)
 391                         dev_warn(&hdev->dev, "failed to report feature\n");
 392         }
 393
 394         kfree(buf);
 395 }
 396
 397 static void mt_feature_mapping(struct hid_device *hdev,
 398                 struct hid_field *field, struct hid_usage *usage)
 399 {
 400         struct mt_device *td = hid_get_drvdata(hdev);
 401
 402         switch (usage->hid) {
 403         case HID_DG_INPUTMODE:
 404                 /* Ignore if value index is out of bounds. */
 405                 if (usage->usage_index >= field->report_count) {
 406                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 407                         break;
 408                 }
 409
 410                 if (td->inputmode < 0) {
 411                         td->inputmode = field->report->id;
 412                         td->inputmode_index = usage->usage_index;
 413                 } else {
 414                         /*
 415                          * Some elan panels wrongly declare 2 input mode
 416                          * features, and silently ignore when we set the
 417                          * value in the second field. Skip the second feature
 418                          * and hope for the best.
 419                          */
 420                         dev_info(&hdev->dev,
 421                                  "Ignoring the extra HID_DG_INPUTMODE\n");
 422                 }
 423
 424                 break;
 425         case HID_DG_CONTACTMAX:
 426                 mt_get_feature(hdev, field->report);
 427
 428                 td->maxcontact_report_id = field->report->id;
 429                 td->maxcontacts = field->value[0];
 430                 if (!td->maxcontacts &&
 431                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 432                         td->maxcontacts = field->logical_maximum;
 433                 if (td->mtclass.maxcontacts)
 434                         /* check if the maxcontacts is given by the class */
 435                         td->maxcontacts = td->mtclass.maxcontacts;
 436
 437                 break;
 438         case HID_DG_BUTTONTYPE:
 439                 if (usage->usage_index >= field->report_count) {
 440                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 441                         break;
 442                 }
 443
 444                 mt_get_feature(hdev, field->report);
 445                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 446                         td->is_buttonpad = true;
 447
 448                 break;
 449         case 0xff0000c5:
 450                 /* Retrieve the Win8 blob once to enable some devices */
 451                 if (usage->usage_index == 0)
 452                         mt_get_feature(hdev, field->report);
 453                 break;
 454         }
 455 }
 456
 457 static void set_abs(struct input_dev *input, unsigned int code,
 458                 struct hid_field *field, int snratio)
 459 {
 460         int fmin = field->logical_minimum;
 461         int fmax = field->logical_maximum;
 462         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 463         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 464         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 465 }
 466
 467 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 468                 struct hid_input *hi)
 469 {
 470         struct mt_fields *f = td->fields;
 471
 472         if (f->length >= HID_MAX_FIELDS)
 473                 return;
 474
 475         f->usages[f->length++] = usage->hid;
 476 }
 477
 478 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 479                 struct hid_field *field, struct hid_usage *usage,
 480                 unsigned long **bit, int *max)
 481 {
 482         struct mt_device *td = hid_get_drvdata(hdev);
 483         struct mt_class *cls = &td->mtclass;
 484         int code;
 485         struct hid_usage *prev_usage = NULL;
 486
 487         if (field->application == HID_DG_TOUCHSCREEN)
 488                 td->mt_flags |= INPUT_MT_DIRECT;
 489
 490         /*
 491          * Model touchscreens providing buttons as touchpads.
 492          */
 493         if (field->application == HID_DG_TOUCHPAD ||
 494             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 495                 td->mt_flags |= INPUT_MT_POINTER;
 496                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 497         }
 498
 499         /* count the buttons on touchpads */
 500         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 501                 td->buttons_count++;
 502
 503         if (usage->usage_index)
 504                 prev_usage = &field->usage[usage->usage_index - 1];
 505
 506         switch (usage->hid & HID_USAGE_PAGE) {
 507
 508         case HID_UP_GENDESK:
 509                 switch (usage->hid) {
 510                 case HID_GD_X:
 511                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 512                                 hid_map_usage(hi, usage, bit, max,
 513                                         EV_ABS, ABS_MT_TOOL_X);
 514                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
 515                                         cls->sn_move);
 516                         } else {
 517                                 hid_map_usage(hi, usage, bit, max,
 518                                         EV_ABS, ABS_MT_POSITION_X);
 519                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
 520                                         cls->sn_move);
 521                         }
 522
 523                         mt_store_field(usage, td, hi);
 524                         return 1;
 525                 case HID_GD_Y:
 526                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 527                                 hid_map_usage(hi, usage, bit, max,
 528                                         EV_ABS, ABS_MT_TOOL_Y);
 529                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
 530                                         cls->sn_move);
 531                         } else {
 532                                 hid_map_usage(hi, usage, bit, max,
 533                                         EV_ABS, ABS_MT_POSITION_Y);
 534                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
 535                                         cls->sn_move);
 536                         }
 537
 538                         mt_store_field(usage, td, hi);
 539                         return 1;
 540                 }
 541                 return 0;
 542
 543         case HID_UP_DIGITIZER:
 544                 switch (usage->hid) {
 545                 case HID_DG_INRANGE:
 546                         if (cls->quirks & MT_QUIRK_HOVERING) {
 547                                 hid_map_usage(hi, usage, bit, max,
 548                                         EV_ABS, ABS_MT_DISTANCE);
 549                                 input_set_abs_params(hi->input,
 550                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 551                         }
 552                         mt_store_field(usage, td, hi);
 553                         return 1;
 554                 case HID_DG_CONFIDENCE:
 555                         if ((cls->name == MT_CLS_WIN_8 ||
 556                                 cls->name == MT_CLS_WIN_8_DUAL) &&
 557                                 field->application == HID_DG_TOUCHPAD)
 558                                 cls->quirks |= MT_QUIRK_CONFIDENCE;
 559                         mt_store_field(usage, td, hi);
 560                         return 1;
 561                 case HID_DG_TIPSWITCH:
 562                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 563                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 564                         mt_store_field(usage, td, hi);
 565                         return 1;
 566                 case HID_DG_CONTACTID:
 567                         mt_store_field(usage, td, hi);
 568                         td->touches_by_report++;
 569                         td->mt_report_id = field->report->id;
 570                         return 1;
 571                 case HID_DG_WIDTH:
 572                         hid_map_usage(hi, usage, bit, max,
 573                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 574                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
 575                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 576                                         cls->sn_width);
 577                         mt_store_field(usage, td, hi);
 578                         return 1;
 579                 case HID_DG_HEIGHT:
 580                         hid_map_usage(hi, usage, bit, max,
 581                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 582                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 583                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 584                                         cls->sn_height);
 585                                 input_set_abs_params(hi->input,
 586                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 587                         }
 588                         mt_store_field(usage, td, hi);
 589                         return 1;
 590                 case HID_DG_TIPPRESSURE:
 591                         hid_map_usage(hi, usage, bit, max,
 592                                         EV_ABS, ABS_MT_PRESSURE);
 593                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 594                                 cls->sn_pressure);
 595                         mt_store_field(usage, td, hi);
 596                         return 1;
 597                 case HID_DG_SCANTIME:
 598                         hid_map_usage(hi, usage, bit, max,
 599                                 EV_MSC, MSC_TIMESTAMP);
 600                         input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
 601                         mt_store_field(usage, td, hi);
 602                         return 1;
 603                 case HID_DG_CONTACTCOUNT:
 604                         /* Ignore if indexes are out of bounds. */
 605                         if (field->index >= field->report->maxfield ||
 606                             usage->usage_index >= field->report_count)
 607                                 return 1;
 608                         td->cc_index = field->index;
 609                         td->cc_value_index = usage->usage_index;
 610                         return 1;
 611                 case HID_DG_CONTACTMAX:
 612                         /* we don't set td->last_slot_field as contactcount and
 613                          * contact max are global to the report */
 614                         return -1;
 615                 case HID_DG_TOUCH:
 616                         /* Legacy devices use TIPSWITCH and not TOUCH.
 617                          * Let's just ignore this field. */
 618                         return -1;
 619                 }
 620                 /* let hid-input decide for the others */
 621                 return 0;
 622
 623         case HID_UP_BUTTON:
 624                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 625                 /*
 626                  * MS PTP spec says that external buttons left and right have
 627                  * usages 2 and 3.
 628                  */
 629                 if ((cls->name == MT_CLS_WIN_8 ||
 630                         cls->name == MT_CLS_WIN_8_DUAL) &&
 631                     field->application == HID_DG_TOUCHPAD &&
 632                     (usage->hid & HID_USAGE) > 1)
 633                         code--;
 634                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 635                 input_set_capability(hi->input, EV_KEY, code);
 636                 return 1;
 637
 638         case 0xff000000:
 639                 /* we do not want to map these: no input-oriented meaning */
 640                 return -1;
 641         }
 642
 643         return 0;
 644 }
 645
 646 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 647 {
 648         __s32 quirks = td->mtclass.quirks;
 649
 650         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 651                 return td->curdata.contactid;
 652
 653         if (quirks & MT_QUIRK_CYPRESS)
 654                 return cypress_compute_slot(td);
 655
 656         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 657                 return td->num_received;
 658
 659         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 660                 return td->curdata.contactid - 1;
 661
 662         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 663 }
 664
 665 /*
 666  * this function is called when a whole contact has been processed,
 667  * so that it can assign it to a slot and store the data there
 668  */
 669 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 670 {
 671         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 672             td->num_received >= td->num_expected)
 673                 return;
 674
 675         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
 676                 int active;
 677                 int slotnum = mt_compute_slot(td, input);
 678                 struct mt_slot *s = &td->curdata;
 679                 struct input_mt *mt = input->mt;
 680
 681                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 682                         return;
 683
 684                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
 685                         struct input_mt_slot *slot = &mt->slots[slotnum];
 686                         if (input_mt_is_active(slot) &&
 687                             input_mt_is_used(mt, slot))
 688                                 return;
 689                 }
 690
 691                 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
 692                         s->confidence_state = 1;
 693                 active = (s->touch_state || s->inrange_state) &&
 694                                                         s->confidence_state;
 695
 696                 input_mt_slot(input, slotnum);
 697                 input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
 698                 if (active) {
 699                         /* this finger is in proximity of the sensor */
 700                         int wide = (s->w > s->h);
 701                         int major = max(s->w, s->h);
 702                         int minor = min(s->w, s->h);
 703
 704                         /*
 705                          * divided by two to match visual scale of touch
 706                          * for devices with this quirk
 707                          */
 708                         if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
 709                                 major = major >> 1;
 710                                 minor = minor >> 1;
 711                         }
 712
 713                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 714                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 715                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
 716                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
 717                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
 718                                 !s->touch_state);
 719                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 720                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 721                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 722                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 723
 724                         set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 725                 }
 726         }
 727
 728         td->num_received++;
 729 }
 730
 731 /*
 732  * this function is called when a whole packet has been received and processed,
 733  * so that it can decide what to send to the input layer.
 734  */
 735 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 736 {
 737         input_mt_sync_frame(input);
 738         input_event(input, EV_MSC, MSC_TIMESTAMP, td->timestamp);
 739         input_sync(input);
 740         td->num_received = 0;
 741         if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
 742                 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 743         else
 744                 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 745         clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 746 }
 747
 748 static int mt_compute_timestamp(struct mt_device *td, struct hid_field *field,
 749                 __s32 value)
 750 {
 751         long delta = value - td->dev_time;
 752         unsigned long jdelta = jiffies_to_usecs(jiffies - td->jiffies);
 753
 754         td->jiffies = jiffies;
 755         td->dev_time = value;
 756
 757         if (delta < 0)
 758                 delta += field->logical_maximum;
 759
 760         /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
 761         delta *= 100;
 762
 763         if (jdelta > MAX_TIMESTAMP_INTERVAL)
 764                 /* No data received for a while, resync the timestamp. */
 765                 return 0;
 766         else
 767                 return td->timestamp + delta;
 768 }
 769
 770 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 771                                 struct hid_usage *usage, __s32 value)
 772 {
 773         /* we will handle the hidinput part later, now remains hiddev */
 774         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 775                 hid->hiddev_hid_event(hid, field, usage, value);
 776
 777         return 1;
 778 }
 779
 780 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 781                                 struct hid_usage *usage, __s32 value)
 782 {
 783         struct mt_device *td = hid_get_drvdata(hid);
 784         __s32 quirks = td->mtclass.quirks;
 785         struct input_dev *input = field->hidinput->input;
 786
 787         if (hid->claimed & HID_CLAIMED_INPUT) {
 788                 switch (usage->hid) {
 789                 case HID_DG_INRANGE:
 790                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 791                                 td->curvalid = value;
 792                         if (quirks & MT_QUIRK_HOVERING)
 793                                 td->curdata.inrange_state = value;
 794                         break;
 795                 case HID_DG_TIPSWITCH:
 796                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 797                                 td->curvalid = value;
 798                         td->curdata.touch_state = value;
 799                         break;
 800                 case HID_DG_CONFIDENCE:
 801                         if (quirks & MT_QUIRK_CONFIDENCE)
 802                                 td->curdata.confidence_state = value;
 803                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 804                                 td->curvalid = value;
 805                         break;
 806                 case HID_DG_CONTACTID:
 807                         td->curdata.contactid = value;
 808                         break;
 809                 case HID_DG_TIPPRESSURE:
 810                         td->curdata.p = value;
 811                         break;
 812                 case HID_GD_X:
 813                         if (usage->code == ABS_MT_TOOL_X)
 814                                 td->curdata.cx = value;
 815                         else
 816                                 td->curdata.x = value;
 817                         break;
 818                 case HID_GD_Y:
 819                         if (usage->code == ABS_MT_TOOL_Y)
 820                                 td->curdata.cy = value;
 821                         else
 822                                 td->curdata.y = value;
 823                         break;
 824                 case HID_DG_WIDTH:
 825                         td->curdata.w = value;
 826                         break;
 827                 case HID_DG_HEIGHT:
 828                         td->curdata.h = value;
 829                         break;
 830                 case HID_DG_SCANTIME:
 831                         td->timestamp = mt_compute_timestamp(td, field, value);
 832                         break;
 833                 case HID_DG_CONTACTCOUNT:
 834                         break;
 835                 case HID_DG_TOUCH:
 836                         /* do nothing */
 837                         break;
 838
 839                 default:
 840                         if (usage->type)
 841                                 input_event(input, usage->type, usage->code,
 842                                                 value);
 843                         return;
 844                 }
 845
 846                 if (usage->usage_index + 1 == field->report_count) {
 847                         /* we only take into account the last report. */
 848                         if (usage->hid == td->last_slot_field)
 849                                 mt_complete_slot(td, field->hidinput->input);
 850                 }
 851
 852         }
 853 }
 854
 855 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
 856 {
 857         struct mt_device *td = hid_get_drvdata(hid);
 858         struct hid_field *field;
 859         unsigned count;
 860         int r, n;
 861
 862         /* sticky fingers release in progress, abort */
 863         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
 864                 return;
 865
 866         /*
 867          * Includes multi-packet support where subsequent
 868          * packets are sent with zero contactcount.
 869          */
 870         if (td->cc_index >= 0) {
 871                 struct hid_field *field = report->field[td->cc_index];
 872                 int value = field->value[td->cc_value_index];
 873                 if (value)
 874                         td->num_expected = value;
 875         }
 876
 877         for (r = 0; r < report->maxfield; r++) {
 878                 field = report->field[r];
 879                 count = field->report_count;
 880
 881                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 882                         continue;
 883
 884                 for (n = 0; n < count; n++)
 885                         mt_process_mt_event(hid, field, &field->usage[n],
 886                                         field->value[n]);
 887         }
 888
 889         if (td->num_received >= td->num_expected)
 890                 mt_sync_frame(td, report->field[0]->hidinput->input);
 891
 892         /*
 893          * Windows 8 specs says 2 things:
 894          * - once a contact has been reported, it has to be reported in each
 895          *   subsequent report
 896          * - the report rate when fingers are present has to be at least
 897          *   the refresh rate of the screen, 60 or 120 Hz
 898          *
 899          * I interprete this that the specification forces a report rate of
 900          * at least 60 Hz for a touchscreen to be certified.
 901          * Which means that if we do not get a report whithin 16 ms, either
 902          * something wrong happens, either the touchscreen forgets to send
 903          * a release. Taking a reasonable margin allows to remove issues
 904          * with USB communication or the load of the machine.
 905          *
 906          * Given that Win 8 devices are forced to send a release, this will
 907          * only affect laggish machines and the ones that have a firmware
 908          * defect.
 909          */
 910         if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) {
 911                 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
 912                         mod_timer(&td->release_timer,
 913                                   jiffies + msecs_to_jiffies(100));
 914                 else
 915                         del_timer(&td->release_timer);
 916         }
 917
 918         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
 919 }
 920
 921 static int mt_touch_input_configured(struct hid_device *hdev,
 922                                         struct hid_input *hi)
 923 {
 924         struct mt_device *td = hid_get_drvdata(hdev);
 925         struct mt_class *cls = &td->mtclass;
 926         struct input_dev *input = hi->input;
 927         int ret;
 928
 929         if (!td->maxcontacts)
 930                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 931
 932         mt_post_parse(td);
 933         if (td->serial_maybe)
 934                 mt_post_parse_default_settings(td);
 935
 936         if (cls->is_indirect)
 937                 td->mt_flags |= INPUT_MT_POINTER;
 938
 939         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 940                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 941
 942         /* check for clickpads */
 943         if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
 944                 td->is_buttonpad = true;
 945
 946         if (td->is_buttonpad)
 947                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 948
 949         ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 950         if (ret)
 951                 return ret;
 952
 953         td->mt_flags = 0;
 954         return 0;
 955 }
 956
 957 #define mt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, \
 958                                                     max, EV_KEY, (c))
 959 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 960                 struct hid_field *field, struct hid_usage *usage,
 961                 unsigned long **bit, int *max)
 962 {
 963         struct mt_device *td = hid_get_drvdata(hdev);
 964
 965         /*
 966          * If mtclass.export_all_inputs is not set, only map fields from
 967          * TouchScreen or TouchPad collections. We need to ignore fields
 968          * that belong to other collections such as Mouse that might have
 969          * the same GenericDesktop usages.
 970          */
 971         if (!td->mtclass.export_all_inputs &&
 972             field->application != HID_DG_TOUCHSCREEN &&
 973             field->application != HID_DG_PEN &&
 974             field->application != HID_DG_TOUCHPAD &&
 975             field->application != HID_GD_KEYBOARD &&
 976             field->application != HID_GD_SYSTEM_CONTROL &&
 977             field->application != HID_CP_CONSUMER_CONTROL &&
 978             field->application != HID_GD_WIRELESS_RADIO_CTLS &&
 979             !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
 980               td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP))
 981                 return -1;
 982
 983         /*
 984          * Some Asus keyboard+touchpad devices have the hotkeys defined in the
 985          * touchpad report descriptor. We need to treat these as an array to
 986          * map usages to input keys.
 987          */
 988         if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
 989             td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
 990             (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
 991                 set_bit(EV_REP, hi->input->evbit);
 992                 if (field->flags & HID_MAIN_ITEM_VARIABLE)
 993                         field->flags &= ~HID_MAIN_ITEM_VARIABLE;
 994                 switch (usage->hid & HID_USAGE) {
 995                 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);        break;
 996                 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);          break;
 997                 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);           break;
 998                 case 0x6b: mt_map_key_clear(KEY_F21);                   break;
 999                 case 0x6c: mt_map_key_clear(KEY_SLEEP);                 break;
1000                 default:
1001                         return -1;
1002                 }
1003                 return 1;
1004         }
1005
1006         /*
1007          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1008          * for the stylus.
1009          * The check for mt_report_id ensures we don't process
1010          * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
1011          * collection, but within the report ID.
1012          */
1013         if (field->physical == HID_DG_STYLUS)
1014                 return 0;
1015         else if ((field->physical == 0) &&
1016                  (field->report->id != td->mt_report_id) &&
1017                  (td->mt_report_id != -1))
1018                 return 0;
1019
1020         if (field->application == HID_DG_TOUCHSCREEN ||
1021             field->application == HID_DG_TOUCHPAD)
1022                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
1023
1024         /* let hid-core decide for the others */
1025         return 0;
1026 }
1027
1028 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1029                 struct hid_field *field, struct hid_usage *usage,
1030                 unsigned long **bit, int *max)
1031 {
1032         /*
1033          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1034          * for the stylus.
1035          */
1036         if (field->physical == HID_DG_STYLUS)
1037                 return 0;
1038
1039         if (field->application == HID_DG_TOUCHSCREEN ||
1040             field->application == HID_DG_TOUCHPAD) {
1041                 /* We own these mappings, tell hid-input to ignore them */
1042                 return -1;
1043         }
1044
1045         /* let hid-core decide for the others */
1046         return 0;
1047 }
1048
1049 static int mt_event(struct hid_device *hid, struct hid_field *field,
1050                                 struct hid_usage *usage, __s32 value)
1051 {
1052         struct mt_device *td = hid_get_drvdata(hid);
1053
1054         if (field->report->id == td->mt_report_id)
1055                 return mt_touch_event(hid, field, usage, value);
1056
1057         return 0;
1058 }
1059
1060 static void mt_report(struct hid_device *hid, struct hid_report *report)
1061 {
1062         struct mt_device *td = hid_get_drvdata(hid);
1063         struct hid_field *field = report->field[0];
1064
1065         if (!(hid->claimed & HID_CLAIMED_INPUT))
1066                 return;
1067
1068         if (report->id == td->mt_report_id)
1069                 return mt_touch_report(hid, report);
1070
1071         if (field && field->hidinput && field->hidinput->input)
1072                 input_sync(field->hidinput->input);
1073 }
1074
1075 static void mt_set_input_mode(struct hid_device *hdev)
1076 {
1077         struct mt_device *td = hid_get_drvdata(hdev);
1078         struct hid_report *r;
1079         struct hid_report_enum *re;
1080         struct mt_class *cls = &td->mtclass;
1081         char *buf;
1082         int report_len;
1083
1084         if (td->inputmode < 0)
1085                 return;
1086
1087         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
1088         r = re->report_id_hash[td->inputmode];
1089         if (r) {
1090                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1091                         report_len = hid_report_len(r);
1092                         buf = hid_alloc_report_buf(r, GFP_KERNEL);
1093                         if (!buf) {
1094                                 hid_err(hdev, "failed to allocate buffer for report\n");
1095                                 return;
1096                         }
1097                         hid_hw_raw_request(hdev, r->id, buf, report_len,
1098                                            HID_FEATURE_REPORT,
1099                                            HID_REQ_GET_REPORT);
1100                         kfree(buf);
1101                 }
1102                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
1103                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1104         }
1105 }
1106
1107 static void mt_set_maxcontacts(struct hid_device *hdev)
1108 {
1109         struct mt_device *td = hid_get_drvdata(hdev);
1110         struct hid_report *r;
1111         struct hid_report_enum *re;
1112         int fieldmax, max;
1113
1114         if (td->maxcontact_report_id < 0)
1115                 return;
1116
1117         if (!td->mtclass.maxcontacts)
1118                 return;
1119
1120         re = &hdev->report_enum[HID_FEATURE_REPORT];
1121         r = re->report_id_hash[td->maxcontact_report_id];
1122         if (r) {
1123                 max = td->mtclass.maxcontacts;
1124                 fieldmax = r->field[0]->logical_maximum;
1125                 max = min(fieldmax, max);
1126                 if (r->field[0]->value[0] != max) {
1127                         r->field[0]->value[0] = max;
1128                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1129                 }
1130         }
1131 }
1132
1133 static void mt_post_parse_default_settings(struct mt_device *td)
1134 {
1135         __s32 quirks = td->mtclass.quirks;
1136
1137         /* unknown serial device needs special quirks */
1138         if (td->touches_by_report == 1) {
1139                 quirks |= MT_QUIRK_ALWAYS_VALID;
1140                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1141                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1142                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1143                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1144         }
1145
1146         td->mtclass.quirks = quirks;
1147 }
1148
1149 static void mt_post_parse(struct mt_device *td)
1150 {
1151         struct mt_fields *f = td->fields;
1152         struct mt_class *cls = &td->mtclass;
1153
1154         if (td->touches_by_report > 0) {
1155                 int field_count_per_touch = f->length / td->touches_by_report;
1156                 td->last_slot_field = f->usages[field_count_per_touch - 1];
1157         }
1158
1159         if (td->cc_index < 0)
1160                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1161 }
1162
1163 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1164 {
1165         struct mt_device *td = hid_get_drvdata(hdev);
1166         char *name;
1167         const char *suffix = NULL;
1168         struct hid_field *field = hi->report->field[0];
1169         int ret;
1170
1171         if (hi->report->id == td->mt_report_id) {
1172                 ret = mt_touch_input_configured(hdev, hi);
1173                 if (ret)
1174                         return ret;
1175         }
1176
1177         /*
1178          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1179          * for the stylus. Check this first, and then rely on the application
1180          * field.
1181          */
1182         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1183                 suffix = "Pen";
1184                 /* force BTN_STYLUS to allow tablet matching in udev */
1185                 __set_bit(BTN_STYLUS, hi->input->keybit);
1186         } else {
1187                 switch (field->application) {
1188                 case HID_GD_KEYBOARD:
1189                         suffix = "Keyboard";
1190                         break;
1191                 case HID_GD_KEYPAD:
1192                         suffix = "Keypad";
1193                         break;
1194                 case HID_GD_MOUSE:
1195                         suffix = "Mouse";
1196                         break;
1197                 case HID_DG_STYLUS:
1198                         suffix = "Pen";
1199                         /* force BTN_STYLUS to allow tablet matching in udev */
1200                         __set_bit(BTN_STYLUS, hi->input->keybit);
1201                         break;
1202                 case HID_DG_TOUCHSCREEN:
1203                         /* we do not set suffix = "Touchscreen" */
1204                         break;
1205                 case HID_DG_TOUCHPAD:
1206                         suffix = "Touchpad";
1207                         break;
1208                 case HID_GD_SYSTEM_CONTROL:
1209                         suffix = "System Control";
1210                         break;
1211                 case HID_CP_CONSUMER_CONTROL:
1212                         suffix = "Consumer Control";
1213                         break;
1214                 case HID_GD_WIRELESS_RADIO_CTLS:
1215                         suffix = "Wireless Radio Control";
1216                         break;
1217                 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1218                         suffix = "Custom Media Keys";
1219                         break;
1220                 default:
1221                         suffix = "UNKNOWN";
1222                         break;
1223                 }
1224         }
1225
1226         if (suffix) {
1227                 name = devm_kzalloc(&hi->input->dev,
1228                                     strlen(hdev->name) + strlen(suffix) + 2,
1229                                     GFP_KERNEL);
1230                 if (name) {
1231                         sprintf(name, "%s %s", hdev->name, suffix);
1232                         hi->input->name = name;
1233                 }
1234         }
1235
1236         return 0;
1237 }
1238
1239 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1240 {
1241         if (field->usage[0].hid != usage ||
1242             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1243                 return;
1244
1245         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1246         field->flags |= HID_MAIN_ITEM_VARIABLE;
1247 }
1248
1249 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1250 {
1251         struct hid_report *report;
1252         int i;
1253
1254         list_for_each_entry(report,
1255                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1256                             list) {
1257
1258                 if (!report->maxfield)
1259                         continue;
1260
1261                 for (i = 0; i < report->maxfield; i++)
1262                         if (report->field[i]->maxusage >= 1)
1263                                 mt_fix_const_field(report->field[i], usage);
1264         }
1265 }
1266
1267 static void mt_release_contacts(struct hid_device *hid)
1268 {
1269         struct hid_input *hidinput;
1270         struct mt_device *td = hid_get_drvdata(hid);
1271
1272         list_for_each_entry(hidinput, &hid->inputs, list) {
1273                 struct input_dev *input_dev = hidinput->input;
1274                 struct input_mt *mt = input_dev->mt;
1275                 int i;
1276
1277                 if (mt) {
1278                         for (i = 0; i < mt->num_slots; i++) {
1279                                 input_mt_slot(input_dev, i);
1280                                 input_mt_report_slot_state(input_dev,
1281                                                            MT_TOOL_FINGER,
1282                                                            false);
1283                         }
1284                         input_mt_sync_frame(input_dev);
1285                         input_sync(input_dev);
1286                 }
1287         }
1288
1289         td->num_received = 0;
1290 }
1291
1292 static void mt_expired_timeout(struct timer_list *t)
1293 {
1294         struct mt_device *td = from_timer(td, t, release_timer);
1295         struct hid_device *hdev = td->hdev;
1296
1297         /*
1298          * An input report came in just before we release the sticky fingers,
1299          * it will take care of the sticky fingers.
1300          */
1301         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1302                 return;
1303         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1304                 mt_release_contacts(hdev);
1305         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1306 }
1307
1308 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1309 {
1310         int ret, i;
1311         struct mt_device *td;
1312         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1313
1314         for (i = 0; mt_classes[i].name ; i++) {
1315                 if (id->driver_data == mt_classes[i].name) {
1316                         mtclass = &(mt_classes[i]);
1317                         break;
1318                 }
1319         }
1320
1321         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1322         if (!td) {
1323                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1324                 return -ENOMEM;
1325         }
1326         td->hdev = hdev;
1327         td->mtclass = *mtclass;
1328         td->inputmode = -1;
1329         td->maxcontact_report_id = -1;
1330         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1331         td->cc_index = -1;
1332         td->mt_report_id = -1;
1333         hid_set_drvdata(hdev, td);
1334
1335         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1336                                   GFP_KERNEL);
1337         if (!td->fields) {
1338                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1339                 return -ENOMEM;
1340         }
1341
1342         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1343                 td->serial_maybe = true;
1344
1345         /*
1346          * Store the initial quirk state
1347          */
1348         td->initial_quirks = hdev->quirks;
1349
1350         /* This allows the driver to correctly support devices
1351          * that emit events over several HID messages.
1352          */
1353         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1354
1355         /*
1356          * This allows the driver to handle different input sensors
1357          * that emits events through different reports on the same HID
1358          * device.
1359          */
1360         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1361         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1362
1363         /*
1364          * Some multitouch screens do not like to be polled for input
1365          * reports. Fortunately, the Win8 spec says that all touches
1366          * should be sent during each report, making the initialization
1367          * of input reports unnecessary. For Win7 devices, well, let's hope
1368          * they will still be happy (this is only be a problem if a touch
1369          * was already there while probing the device).
1370          *
1371          * In addition some touchpads do not behave well if we read
1372          * all feature reports from them. Instead we prevent
1373          * initial report fetching and then selectively fetch each
1374          * report we are interested in.
1375          */
1376         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1377
1378         timer_setup(&td->release_timer, mt_expired_timeout, 0);
1379
1380         ret = hid_parse(hdev);
1381         if (ret != 0)
1382                 return ret;
1383
1384         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1385                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1386
1387         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1388         if (ret)
1389                 return ret;
1390
1391         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1392         if (ret)
1393                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1394                                 hdev->name);
1395
1396         mt_set_maxcontacts(hdev);
1397         mt_set_input_mode(hdev);
1398
1399         /* release .fields memory as it is not used anymore */
1400         devm_kfree(&hdev->dev, td->fields);
1401         td->fields = NULL;
1402
1403         return 0;
1404 }
1405
1406 #ifdef CONFIG_PM
1407 static int mt_reset_resume(struct hid_device *hdev)
1408 {
1409         mt_release_contacts(hdev);
1410         mt_set_maxcontacts(hdev);
1411         mt_set_input_mode(hdev);
1412         return 0;
1413 }
1414
1415 static int mt_resume(struct hid_device *hdev)
1416 {
1417         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1418          * It should be safe to send it to other devices too.
1419          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1420
1421         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1422
1423         return 0;
1424 }
1425 #endif
1426
1427 static void mt_remove(struct hid_device *hdev)
1428 {
1429         struct mt_device *td = hid_get_drvdata(hdev);
1430
1431         del_timer_sync(&td->release_timer);
1432
1433         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1434         hid_hw_stop(hdev);
1435         hdev->quirks = td->initial_quirks;
1436 }
1437
1438 /*
1439  * This list contains only:
1440  * - VID/PID of products not working with the default multitouch handling
1441  * - 2 generic rules.
1442  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1443  */
1444 static const struct hid_device_id mt_devices[] = {
1445
1446         /* 3M panels */
1447         { .driver_data = MT_CLS_3M,
1448                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1449                         USB_DEVICE_ID_3M1968) },
1450         { .driver_data = MT_CLS_3M,
1451                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1452                         USB_DEVICE_ID_3M2256) },
1453         { .driver_data = MT_CLS_3M,
1454                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1455                         USB_DEVICE_ID_3M3266) },
1456
1457         /* Alps devices */
1458         { .driver_data = MT_CLS_WIN_8_DUAL,
1459                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1460                         USB_VENDOR_ID_ALPS_JP,
1461                         HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1462         { .driver_data = MT_CLS_WIN_8_DUAL,
1463                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1464                         USB_VENDOR_ID_ALPS_JP,
1465                         HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1466
1467         /* Lenovo X1 TAB Gen 2 */
1468         { .driver_data = MT_CLS_WIN_8_DUAL,
1469                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1470                            USB_VENDOR_ID_LENOVO,
1471                            USB_DEVICE_ID_LENOVO_X1_TAB) },
1472
1473         /* Anton devices */
1474         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1475                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1476                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1477
1478         /* Asus T304UA */
1479         { .driver_data = MT_CLS_ASUS,
1480                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1481                         USB_VENDOR_ID_ASUSTEK,
1482                         USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1483
1484         /* Atmel panels */
1485         { .driver_data = MT_CLS_SERIAL,
1486                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1487                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1488
1489         /* Baanto multitouch devices */
1490         { .driver_data = MT_CLS_NSMU,
1491                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1492                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1493
1494         /* Cando panels */
1495         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1496                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1497                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1498         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1499                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1500                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1501
1502         /* Chunghwa Telecom touch panels */
1503         {  .driver_data = MT_CLS_NSMU,
1504                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1505                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1506
1507         /* CJTouch panels */
1508         { .driver_data = MT_CLS_NSMU,
1509                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1510                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1511         { .driver_data = MT_CLS_NSMU,
1512                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1513                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1514
1515         /* CVTouch panels */
1516         { .driver_data = MT_CLS_NSMU,
1517                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1518                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1519
1520         /* eGalax devices (resistive) */
1521         { .driver_data = MT_CLS_EGALAX,
1522                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1523                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1524         { .driver_data = MT_CLS_EGALAX,
1525                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1526                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1527
1528         /* eGalax devices (capacitive) */
1529         { .driver_data = MT_CLS_EGALAX_SERIAL,
1530                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1531                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1532         { .driver_data = MT_CLS_EGALAX,
1533                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1534                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1535         { .driver_data = MT_CLS_EGALAX_SERIAL,
1536                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1537                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1538         { .driver_data = MT_CLS_EGALAX_SERIAL,
1539                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1540                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1541         { .driver_data = MT_CLS_EGALAX_SERIAL,
1542                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1543                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1544         { .driver_data = MT_CLS_EGALAX_SERIAL,
1545                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1546                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1547         { .driver_data = MT_CLS_EGALAX,
1548                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1549                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1550         { .driver_data = MT_CLS_EGALAX,
1551                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1552                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1553         { .driver_data = MT_CLS_EGALAX_SERIAL,
1554                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1555                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1556         { .driver_data = MT_CLS_EGALAX,
1557                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1558                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1559         { .driver_data = MT_CLS_EGALAX,
1560                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1561                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1562         { .driver_data = MT_CLS_EGALAX,
1563                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1564                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1565         { .driver_data = MT_CLS_EGALAX,
1566                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1567                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1568         { .driver_data = MT_CLS_EGALAX_SERIAL,
1569                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1570                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1571         { .driver_data = MT_CLS_EGALAX_SERIAL,
1572                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1573                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1574         { .driver_data = MT_CLS_EGALAX_SERIAL,
1575                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1576                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1577
1578         /* Elitegroup panel */
1579         { .driver_data = MT_CLS_SERIAL,
1580                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1581                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1582
1583         /* Flatfrog Panels */
1584         { .driver_data = MT_CLS_FLATFROG,
1585                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1586                         USB_DEVICE_ID_MULTITOUCH_3200) },
1587
1588         /* FocalTech Panels */
1589         { .driver_data = MT_CLS_SERIAL,
1590                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1591                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1592
1593         /* GeneralTouch panel */
1594         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1595                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1596                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1597         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1598                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1599                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1600         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1601                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1602                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1603         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1604                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1605                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1606         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1607                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1608                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1609         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1610                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1611                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1612         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1613                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1614                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1615
1616         /* Gametel game controller */
1617         { .driver_data = MT_CLS_NSMU,
1618                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1619                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1620
1621         /* GoodTouch panels */
1622         { .driver_data = MT_CLS_NSMU,
1623                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1624                         USB_DEVICE_ID_GOODTOUCH_000f) },
1625
1626         /* Hanvon panels */
1627         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1628                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1629                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1630
1631         /* Ilitek dual touch panel */
1632         {  .driver_data = MT_CLS_NSMU,
1633                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1634                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1635
1636         /* LG Melfas panel */
1637         { .driver_data = MT_CLS_LG,
1638                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1639                         USB_DEVICE_ID_LG_MELFAS_MT) },
1640
1641         /* MosArt panels */
1642         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1643                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1644                         USB_DEVICE_ID_ASUS_T91MT)},
1645         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1646                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1647                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1648         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1649                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1650                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1651
1652         /* Panasonic panels */
1653         { .driver_data = MT_CLS_PANASONIC,
1654                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1655                         USB_DEVICE_ID_PANABOARD_UBT780) },
1656         { .driver_data = MT_CLS_PANASONIC,
1657                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1658                         USB_DEVICE_ID_PANABOARD_UBT880) },
1659
1660         /* Novatek Panel */
1661         { .driver_data = MT_CLS_NSMU,
1662                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1663                         USB_DEVICE_ID_NOVATEK_PCT) },
1664
1665         /* Ntrig Panel */
1666         { .driver_data = MT_CLS_NSMU,
1667                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1668                         USB_VENDOR_ID_NTRIG, 0x1b05) },
1669
1670         /* PixArt optical touch screen */
1671         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1672                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1673                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1674         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1675                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1676                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1677         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1678                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1679                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1680
1681         /* PixCir-based panels */
1682         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1683                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1684                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1685
1686         /* Quanta-based panels */
1687         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1688                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1689                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1690
1691         /* Stantum panels */
1692         { .driver_data = MT_CLS_CONFIDENCE,
1693                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1694                         USB_DEVICE_ID_MTP_STM)},
1695
1696         /* TopSeed panels */
1697         { .driver_data = MT_CLS_TOPSEED,
1698                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1699                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1700
1701         /* Touch International panels */
1702         { .driver_data = MT_CLS_NSMU,
1703                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1704                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1705
1706         /* Unitec panels */
1707         { .driver_data = MT_CLS_NSMU,
1708                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1709                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1710         { .driver_data = MT_CLS_NSMU,
1711                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1712                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1713
1714         /* VTL panels */
1715         { .driver_data = MT_CLS_VTL,
1716                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1717                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1718
1719         /* Wistron panels */
1720         { .driver_data = MT_CLS_NSMU,
1721                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1722                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1723
1724         /* XAT */
1725         { .driver_data = MT_CLS_NSMU,
1726                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1727                         USB_DEVICE_ID_XAT_CSR) },
1728
1729         /* Xiroku */
1730         { .driver_data = MT_CLS_NSMU,
1731                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1732                         USB_DEVICE_ID_XIROKU_SPX) },
1733         { .driver_data = MT_CLS_NSMU,
1734                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1735                         USB_DEVICE_ID_XIROKU_MPX) },
1736         { .driver_data = MT_CLS_NSMU,
1737                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1738                         USB_DEVICE_ID_XIROKU_CSR) },
1739         { .driver_data = MT_CLS_NSMU,
1740                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1741                         USB_DEVICE_ID_XIROKU_SPX1) },
1742         { .driver_data = MT_CLS_NSMU,
1743                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1744                         USB_DEVICE_ID_XIROKU_MPX1) },
1745         { .driver_data = MT_CLS_NSMU,
1746                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1747                         USB_DEVICE_ID_XIROKU_CSR1) },
1748         { .driver_data = MT_CLS_NSMU,
1749                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1750                         USB_DEVICE_ID_XIROKU_SPX2) },
1751         { .driver_data = MT_CLS_NSMU,
1752                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1753                         USB_DEVICE_ID_XIROKU_MPX2) },
1754         { .driver_data = MT_CLS_NSMU,
1755                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1756                         USB_DEVICE_ID_XIROKU_CSR2) },
1757
1758         /* Google MT devices */
1759         { .driver_data = MT_CLS_GOOGLE,
1760                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
1761                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
1762
1763         /* Generic MT device */
1764         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1765
1766         /* Generic Win 8 certified MT device */
1767         {  .driver_data = MT_CLS_WIN_8,
1768                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1769                         HID_ANY_ID, HID_ANY_ID) },
1770         { }
1771 };
1772 MODULE_DEVICE_TABLE(hid, mt_devices);
1773
1774 static const struct hid_usage_id mt_grabbed_usages[] = {
1775         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1776         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1777 };
1778
1779 static struct hid_driver mt_driver = {
1780         .name = "hid-multitouch",
1781         .id_table = mt_devices,
1782         .probe = mt_probe,
1783         .remove = mt_remove,
1784         .input_mapping = mt_input_mapping,
1785         .input_mapped = mt_input_mapped,
1786         .input_configured = mt_input_configured,
1787         .feature_mapping = mt_feature_mapping,
1788         .usage_table = mt_grabbed_usages,
1789         .event = mt_event,
1790         .report = mt_report,
1791 #ifdef CONFIG_PM
1792         .reset_resume = mt_reset_resume,
1793         .resume = mt_resume,
1794 #endif
1795 };
1796 module_hid_driver(mt_driver);