drivers/hid/hid-multitouch.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  HID driver for multitouch panels
   4  *
   5  *  Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
   6  *  Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   7  *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
   8  *  Copyright (c) 2012-2013 Red Hat, Inc
   9  *
  10  *  This code is partly based on hid-egalax.c:
  11  *
  12  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  13  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  14  *  Copyright (c) 2010 Canonical, Ltd.
  15  *
  16  *  This code is partly based on hid-3m-pct.c:
  17  *
  18  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  19  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  20  *  Copyright (c) 2010      Canonical, Ltd.
  21  */
  22
  23 /*
  24  */
  25
  26 /*
  27  * This driver is regularly tested thanks to the test suite in hid-tools[1].
  28  * Please run these regression tests before patching this module so that
  29  * your patch won't break existing known devices.
  30  *
  31  * [1] https://gitlab.freedesktop.org/libevdev/hid-tools
  32  */
  33
  34 #include <linux/device.h>
  35 #include <linux/hid.h>
  36 #include <linux/module.h>
  37 #include <linux/slab.h>
  38 #include <linux/input/mt.h>
  39 #include <linux/jiffies.h>
  40 #include <linux/string.h>
  41 #include <linux/timer.h>
  42
  43
  44 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  45 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  46 MODULE_DESCRIPTION("HID multitouch panels");
  47 MODULE_LICENSE("GPL");
  48
  49 #include "hid-ids.h"
  50
  51 /* quirks to control the device */
  52 #define MT_QUIRK_NOT_SEEN_MEANS_UP      BIT(0)
  53 #define MT_QUIRK_SLOT_IS_CONTACTID      BIT(1)
  54 #define MT_QUIRK_CYPRESS                BIT(2)
  55 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
  56 #define MT_QUIRK_ALWAYS_VALID           BIT(4)
  57 #define MT_QUIRK_VALID_IS_INRANGE       BIT(5)
  58 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
  59 #define MT_QUIRK_CONFIDENCE             BIT(7)
  60 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
  61 #define MT_QUIRK_NO_AREA                BIT(9)
  62 #define MT_QUIRK_IGNORE_DUPLICATES      BIT(10)
  63 #define MT_QUIRK_HOVERING               BIT(11)
  64 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
  65 #define MT_QUIRK_FORCE_GET_FEATURE      BIT(13)
  66 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
  67 #define MT_QUIRK_TOUCH_SIZE_SCALING     BIT(15)
  68 #define MT_QUIRK_STICKY_FINGERS         BIT(16)
  69 #define MT_QUIRK_ASUS_CUSTOM_UP         BIT(17)
  70 #define MT_QUIRK_WIN8_PTP_BUTTONS       BIT(18)
  71 #define MT_QUIRK_SEPARATE_APP_REPORT    BIT(19)
  72 #define MT_QUIRK_FORCE_MULTI_INPUT      BIT(20)
  73
  74 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  75 #define MT_INPUTMODE_TOUCHPAD           0x03
  76
  77 #define MT_BUTTONTYPE_CLICKPAD          0
  78
  79 enum latency_mode {
  80         HID_LATENCY_NORMAL = 0,
  81         HID_LATENCY_HIGH = 1,
  82 };
  83
  84 #define MT_IO_FLAGS_RUNNING             0
  85 #define MT_IO_FLAGS_ACTIVE_SLOTS        1
  86 #define MT_IO_FLAGS_PENDING_SLOTS       2
  87
  88 static const bool mtrue = true;         /* default for true */
  89 static const bool mfalse;               /* default for false */
  90 static const __s32 mzero;               /* default for 0 */
  91
  92 #define DEFAULT_TRUE    ((void *)&mtrue)
  93 #define DEFAULT_FALSE   ((void *)&mfalse)
  94 #define DEFAULT_ZERO    ((void *)&mzero)
  95
  96 struct mt_usages {
  97         struct list_head list;
  98         __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
  99         __s32 *contactid;       /* the device ContactID assigned to this slot */
 100         bool *tip_state;        /* is the touch valid? */
 101         bool *inrange_state;    /* is the finger in proximity of the sensor? */
 102         bool *confidence_state; /* is the touch made by a finger? */
 103 };
 104
 105 struct mt_application {
 106         struct list_head list;
 107         unsigned int application;
 108         unsigned int report_id;
 109         struct list_head mt_usages;     /* mt usages list */
 110
 111         __s32 quirks;
 112
 113         __s32 *scantime;                /* scantime reported */
 114         __s32 scantime_logical_max;     /* max value for raw scantime */
 115
 116         __s32 *raw_cc;                  /* contact count in the report */
 117         int left_button_state;          /* left button state */
 118         unsigned int mt_flags;          /* flags to pass to input-mt */
 119
 120         unsigned long *pending_palm_slots;      /* slots where we reported palm
 121                                                  * and need to release */
 122
 123         __u8 num_received;      /* how many contacts we received */
 124         __u8 num_expected;      /* expected last contact index */
 125         __u8 buttons_count;     /* number of physical buttons per touchpad */
 126         __u8 touches_by_report; /* how many touches are present in one report:
 127                                  * 1 means we should use a serial protocol
 128                                  * > 1 means hybrid (multitouch) protocol
 129                                  */
 130
 131         __s32 dev_time;         /* the scan time provided by the device */
 132         unsigned long jiffies;  /* the frame's jiffies */
 133         int timestamp;          /* the timestamp to be sent */
 134         int prev_scantime;              /* scantime reported previously */
 135
 136         bool have_contact_count;
 137 };
 138
 139 struct mt_class {
 140         __s32 name;     /* MT_CLS */
 141         __s32 quirks;
 142         __s32 sn_move;  /* Signal/noise ratio for move events */
 143         __s32 sn_width; /* Signal/noise ratio for width events */
 144         __s32 sn_height;        /* Signal/noise ratio for height events */
 145         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 146         __u8 maxcontacts;
 147         bool is_indirect;       /* true for touchpads */
 148         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 149 };
 150
 151 struct mt_report_data {
 152         struct list_head list;
 153         struct hid_report *report;
 154         struct mt_application *application;
 155         bool is_mt_collection;
 156 };
 157
 158 struct mt_device {
 159         struct mt_class mtclass;        /* our mt device class */
 160         struct timer_list release_timer;        /* to release sticky fingers */
 161         struct hid_device *hdev;        /* hid_device we're attached to */
 162         unsigned long mt_io_flags;      /* mt flags (MT_IO_FLAGS_*) */
 163         __u8 inputmode_value;   /* InputMode HID feature value */
 164         __u8 maxcontacts;
 165         bool is_buttonpad;      /* is this device a button pad? */
 166         bool serial_maybe;      /* need to check for serial protocol */
 167
 168         struct list_head applications;
 169         struct list_head reports;
 170 };
 171
 172 static void mt_post_parse_default_settings(struct mt_device *td,
 173                                            struct mt_application *app);
 174 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
 175
 176 /* classes of device behavior */
 177 #define MT_CLS_DEFAULT                          0x0001
 178
 179 #define MT_CLS_SERIAL                           0x0002
 180 #define MT_CLS_CONFIDENCE                       0x0003
 181 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 182 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 183 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 184 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 185 /* reserved                                     0x0008 */
 186 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 187 #define MT_CLS_NSMU                             0x000a
 188 /* reserved                                     0x0010 */
 189 /* reserved                                     0x0011 */
 190 #define MT_CLS_WIN_8                            0x0012
 191 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 192 /* reserved                                     0x0014 */
 193 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT          0x0015
 194
 195 /* vendor specific classes */
 196 #define MT_CLS_3M                               0x0101
 197 /* reserved                                     0x0102 */
 198 #define MT_CLS_EGALAX                           0x0103
 199 #define MT_CLS_EGALAX_SERIAL                    0x0104
 200 #define MT_CLS_TOPSEED                          0x0105
 201 #define MT_CLS_PANASONIC                        0x0106
 202 #define MT_CLS_FLATFROG                         0x0107
 203 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 204 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 205 #define MT_CLS_LG                               0x010a
 206 #define MT_CLS_ASUS                             0x010b
 207 #define MT_CLS_VTL                              0x0110
 208 #define MT_CLS_GOOGLE                           0x0111
 209 #define MT_CLS_RAZER_BLADE_STEALTH              0x0112
 210 #define MT_CLS_SMART_TECH                       0x0113
 211
 212 #define MT_DEFAULT_MAXCONTACT   10
 213 #define MT_MAX_MAXCONTACT       250
 214
 215 /*
 216  * Resync device and local timestamps after that many microseconds without
 217  * receiving data.
 218  */
 219 #define MAX_TIMESTAMP_INTERVAL  1000000
 220
 221 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 222 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 223
 224 /*
 225  * these device-dependent functions determine what slot corresponds
 226  * to a valid contact that was just read.
 227  */
 228
 229 static int cypress_compute_slot(struct mt_application *application,
 230                                 struct mt_usages *slot)
 231 {
 232         if (*slot->contactid != 0 || application->num_received == 0)
 233                 return *slot->contactid;
 234         else
 235                 return -1;
 236 }
 237
 238 static const struct mt_class mt_classes[] = {
 239         { .name = MT_CLS_DEFAULT,
 240                 .quirks = MT_QUIRK_ALWAYS_VALID |
 241                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 242         { .name = MT_CLS_NSMU,
 243                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 244         { .name = MT_CLS_SERIAL,
 245                 .quirks = MT_QUIRK_ALWAYS_VALID},
 246         { .name = MT_CLS_CONFIDENCE,
 247                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 248         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 249                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 250                         MT_QUIRK_SLOT_IS_CONTACTID },
 251         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 252                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 253                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 254         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 255                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 256                         MT_QUIRK_SLOT_IS_CONTACTID,
 257                 .maxcontacts = 2 },
 258         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 259                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 260                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 261                 .maxcontacts = 2 },
 262         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 263                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 264                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 265         { .name = MT_CLS_WIN_8,
 266                 .quirks = MT_QUIRK_ALWAYS_VALID |
 267                         MT_QUIRK_IGNORE_DUPLICATES |
 268                         MT_QUIRK_HOVERING |
 269                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 270                         MT_QUIRK_STICKY_FINGERS |
 271                         MT_QUIRK_WIN8_PTP_BUTTONS,
 272                 .export_all_inputs = true },
 273         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 274                 .quirks = MT_QUIRK_ALWAYS_VALID |
 275                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 276                 .export_all_inputs = true },
 277         { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
 278                 .quirks = MT_QUIRK_ALWAYS_VALID |
 279                         MT_QUIRK_IGNORE_DUPLICATES |
 280                         MT_QUIRK_HOVERING |
 281                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 282                         MT_QUIRK_STICKY_FINGERS |
 283                         MT_QUIRK_WIN8_PTP_BUTTONS |
 284                         MT_QUIRK_FORCE_MULTI_INPUT,
 285                 .export_all_inputs = true },
 286
 287         /*
 288          * vendor specific classes
 289          */
 290         { .name = MT_CLS_3M,
 291                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 292                         MT_QUIRK_SLOT_IS_CONTACTID |
 293                         MT_QUIRK_TOUCH_SIZE_SCALING,
 294                 .sn_move = 2048,
 295                 .sn_width = 128,
 296                 .sn_height = 128,
 297                 .maxcontacts = 60,
 298         },
 299         { .name = MT_CLS_EGALAX,
 300                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 301                         MT_QUIRK_VALID_IS_INRANGE,
 302                 .sn_move = 4096,
 303                 .sn_pressure = 32,
 304         },
 305         { .name = MT_CLS_EGALAX_SERIAL,
 306                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 307                         MT_QUIRK_ALWAYS_VALID,
 308                 .sn_move = 4096,
 309                 .sn_pressure = 32,
 310         },
 311         { .name = MT_CLS_TOPSEED,
 312                 .quirks = MT_QUIRK_ALWAYS_VALID,
 313                 .is_indirect = true,
 314                 .maxcontacts = 2,
 315         },
 316         { .name = MT_CLS_PANASONIC,
 317                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 318                 .maxcontacts = 4 },
 319         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 320                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 321                         MT_QUIRK_VALID_IS_INRANGE |
 322                         MT_QUIRK_SLOT_IS_CONTACTID,
 323                 .maxcontacts = 2
 324         },
 325         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 326                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 327                         MT_QUIRK_SLOT_IS_CONTACTID
 328         },
 329
 330         { .name = MT_CLS_FLATFROG,
 331                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 332                         MT_QUIRK_NO_AREA,
 333                 .sn_move = 2048,
 334                 .maxcontacts = 40,
 335         },
 336         { .name = MT_CLS_LG,
 337                 .quirks = MT_QUIRK_ALWAYS_VALID |
 338                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 339                         MT_QUIRK_IGNORE_DUPLICATES |
 340                         MT_QUIRK_HOVERING |
 341                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 342         { .name = MT_CLS_ASUS,
 343                 .quirks = MT_QUIRK_ALWAYS_VALID |
 344                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 345                         MT_QUIRK_ASUS_CUSTOM_UP },
 346         { .name = MT_CLS_VTL,
 347                 .quirks = MT_QUIRK_ALWAYS_VALID |
 348                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 349                         MT_QUIRK_FORCE_GET_FEATURE,
 350         },
 351         { .name = MT_CLS_GOOGLE,
 352                 .quirks = MT_QUIRK_ALWAYS_VALID |
 353                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 354                         MT_QUIRK_SLOT_IS_CONTACTID |
 355                         MT_QUIRK_HOVERING
 356         },
 357         { .name = MT_CLS_RAZER_BLADE_STEALTH,
 358                 .quirks = MT_QUIRK_ALWAYS_VALID |
 359                         MT_QUIRK_IGNORE_DUPLICATES |
 360                         MT_QUIRK_HOVERING |
 361                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 362                         MT_QUIRK_WIN8_PTP_BUTTONS,
 363         },
 364         { .name = MT_CLS_SMART_TECH,
 365                 .quirks = MT_QUIRK_ALWAYS_VALID |
 366                         MT_QUIRK_IGNORE_DUPLICATES |
 367                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 368                         MT_QUIRK_SEPARATE_APP_REPORT,
 369         },
 370         { }
 371 };
 372
 373 static ssize_t mt_show_quirks(struct device *dev,
 374                            struct device_attribute *attr,
 375                            char *buf)
 376 {
 377         struct hid_device *hdev = to_hid_device(dev);
 378         struct mt_device *td = hid_get_drvdata(hdev);
 379
 380         return sprintf(buf, "%u\n", td->mtclass.quirks);
 381 }
 382
 383 static ssize_t mt_set_quirks(struct device *dev,
 384                           struct device_attribute *attr,
 385                           const char *buf, size_t count)
 386 {
 387         struct hid_device *hdev = to_hid_device(dev);
 388         struct mt_device *td = hid_get_drvdata(hdev);
 389         struct mt_application *application;
 390
 391         unsigned long val;
 392
 393         if (kstrtoul(buf, 0, &val))
 394                 return -EINVAL;
 395
 396         td->mtclass.quirks = val;
 397
 398         list_for_each_entry(application, &td->applications, list) {
 399                 application->quirks = val;
 400                 if (!application->have_contact_count)
 401                         application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 402         }
 403
 404         return count;
 405 }
 406
 407 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 408
 409 static struct attribute *sysfs_attrs[] = {
 410         &dev_attr_quirks.attr,
 411         NULL
 412 };
 413
 414 static const struct attribute_group mt_attribute_group = {
 415         .attrs = sysfs_attrs
 416 };
 417
 418 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 419 {
 420         int ret;
 421         u32 size = hid_report_len(report);
 422         u8 *buf;
 423
 424         /*
 425          * Do not fetch the feature report if the device has been explicitly
 426          * marked as non-capable.
 427          */
 428         if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
 429                 return;
 430
 431         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 432         if (!buf)
 433                 return;
 434
 435         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 436                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 437         if (ret < 0) {
 438                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 439                          report->id);
 440         } else {
 441                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 442                                            size, 0);
 443                 if (ret)
 444                         dev_warn(&hdev->dev, "failed to report feature\n");
 445         }
 446
 447         kfree(buf);
 448 }
 449
 450 static void mt_feature_mapping(struct hid_device *hdev,
 451                 struct hid_field *field, struct hid_usage *usage)
 452 {
 453         struct mt_device *td = hid_get_drvdata(hdev);
 454
 455         switch (usage->hid) {
 456         case HID_DG_CONTACTMAX:
 457                 mt_get_feature(hdev, field->report);
 458
 459                 td->maxcontacts = field->value[0];
 460                 if (!td->maxcontacts &&
 461                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 462                         td->maxcontacts = field->logical_maximum;
 463                 if (td->mtclass.maxcontacts)
 464                         /* check if the maxcontacts is given by the class */
 465                         td->maxcontacts = td->mtclass.maxcontacts;
 466
 467                 break;
 468         case HID_DG_BUTTONTYPE:
 469                 if (usage->usage_index >= field->report_count) {
 470                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 471                         break;
 472                 }
 473
 474                 mt_get_feature(hdev, field->report);
 475                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 476                         td->is_buttonpad = true;
 477
 478                 break;
 479         case 0xff0000c5:
 480                 /* Retrieve the Win8 blob once to enable some devices */
 481                 if (usage->usage_index == 0)
 482                         mt_get_feature(hdev, field->report);
 483                 break;
 484         }
 485 }
 486
 487 static void set_abs(struct input_dev *input, unsigned int code,
 488                 struct hid_field *field, int snratio)
 489 {
 490         int fmin = field->logical_minimum;
 491         int fmax = field->logical_maximum;
 492         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 493         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 494         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 495 }
 496
 497 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
 498                                            struct mt_application *application)
 499 {
 500         struct mt_usages *usage;
 501
 502         usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
 503         if (!usage)
 504                 return NULL;
 505
 506         /* set some defaults so we do not need to check for null pointers */
 507         usage->x = DEFAULT_ZERO;
 508         usage->y = DEFAULT_ZERO;
 509         usage->cx = DEFAULT_ZERO;
 510         usage->cy = DEFAULT_ZERO;
 511         usage->p = DEFAULT_ZERO;
 512         usage->w = DEFAULT_ZERO;
 513         usage->h = DEFAULT_ZERO;
 514         usage->a = DEFAULT_ZERO;
 515         usage->contactid = DEFAULT_ZERO;
 516         usage->tip_state = DEFAULT_FALSE;
 517         usage->inrange_state = DEFAULT_FALSE;
 518         usage->confidence_state = DEFAULT_TRUE;
 519
 520         list_add_tail(&usage->list, &application->mt_usages);
 521
 522         return usage;
 523 }
 524
 525 static struct mt_application *mt_allocate_application(struct mt_device *td,
 526                                                       struct hid_report *report)
 527 {
 528         unsigned int application = report->application;
 529         struct mt_application *mt_application;
 530
 531         mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
 532                                       GFP_KERNEL);
 533         if (!mt_application)
 534                 return NULL;
 535
 536         mt_application->application = application;
 537         INIT_LIST_HEAD(&mt_application->mt_usages);
 538
 539         if (application == HID_DG_TOUCHSCREEN)
 540                 mt_application->mt_flags |= INPUT_MT_DIRECT;
 541
 542         /*
 543          * Model touchscreens providing buttons as touchpads.
 544          */
 545         if (application == HID_DG_TOUCHPAD) {
 546                 mt_application->mt_flags |= INPUT_MT_POINTER;
 547                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 548         }
 549
 550         mt_application->scantime = DEFAULT_ZERO;
 551         mt_application->raw_cc = DEFAULT_ZERO;
 552         mt_application->quirks = td->mtclass.quirks;
 553         mt_application->report_id = report->id;
 554
 555         list_add_tail(&mt_application->list, &td->applications);
 556
 557         return mt_application;
 558 }
 559
 560 static struct mt_application *mt_find_application(struct mt_device *td,
 561                                                   struct hid_report *report)
 562 {
 563         unsigned int application = report->application;
 564         struct mt_application *tmp, *mt_application = NULL;
 565
 566         list_for_each_entry(tmp, &td->applications, list) {
 567                 if (application == tmp->application) {
 568                         if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
 569                             tmp->report_id == report->id) {
 570                                 mt_application = tmp;
 571                                 break;
 572                         }
 573                 }
 574         }
 575
 576         if (!mt_application)
 577                 mt_application = mt_allocate_application(td, report);
 578
 579         return mt_application;
 580 }
 581
 582 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
 583                                                       struct hid_report *report)
 584 {
 585         struct mt_report_data *rdata;
 586         struct hid_field *field;
 587         int r, n;
 588
 589         rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
 590         if (!rdata)
 591                 return NULL;
 592
 593         rdata->report = report;
 594         rdata->application = mt_find_application(td, report);
 595
 596         if (!rdata->application) {
 597                 devm_kfree(&td->hdev->dev, rdata);
 598                 return NULL;
 599         }
 600
 601         for (r = 0; r < report->maxfield; r++) {
 602                 field = report->field[r];
 603
 604                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 605                         continue;
 606
 607                 for (n = 0; n < field->report_count; n++) {
 608                         if (field->usage[n].hid == HID_DG_CONTACTID)
 609                                 rdata->is_mt_collection = true;
 610                 }
 611         }
 612
 613         list_add_tail(&rdata->list, &td->reports);
 614
 615         return rdata;
 616 }
 617
 618 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
 619                                                   struct hid_report *report)
 620 {
 621         struct mt_report_data *tmp, *rdata = NULL;
 622
 623         list_for_each_entry(tmp, &td->reports, list) {
 624                 if (report == tmp->report) {
 625                         rdata = tmp;
 626                         break;
 627                 }
 628         }
 629
 630         if (!rdata)
 631                 rdata = mt_allocate_report_data(td, report);
 632
 633         return rdata;
 634 }
 635
 636 static void mt_store_field(struct hid_device *hdev,
 637                            struct mt_application *application,
 638                            __s32 *value,
 639                            size_t offset)
 640 {
 641         struct mt_usages *usage;
 642         __s32 **target;
 643
 644         if (list_empty(&application->mt_usages))
 645                 usage = mt_allocate_usage(hdev, application);
 646         else
 647                 usage = list_last_entry(&application->mt_usages,
 648                                         struct mt_usages,
 649                                         list);
 650
 651         if (!usage)
 652                 return;
 653
 654         target = (__s32 **)((char *)usage + offset);
 655
 656         /* the value has already been filled, create a new slot */
 657         if (*target != DEFAULT_TRUE &&
 658             *target != DEFAULT_FALSE &&
 659             *target != DEFAULT_ZERO) {
 660                 if (usage->contactid == DEFAULT_ZERO ||
 661                     usage->x == DEFAULT_ZERO ||
 662                     usage->y == DEFAULT_ZERO) {
 663                         hid_dbg(hdev,
 664                                 "ignoring duplicate usage on incomplete");
 665                         return;
 666                 }
 667                 usage = mt_allocate_usage(hdev, application);
 668                 if (!usage)
 669                         return;
 670
 671                 target = (__s32 **)((char *)usage + offset);
 672         }
 673
 674         *target = value;
 675 }
 676
 677 #define MT_STORE_FIELD(__name)                                          \
 678         mt_store_field(hdev, app,                                       \
 679                        &field->value[usage->usage_index],               \
 680                        offsetof(struct mt_usages, __name))
 681
 682 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 683                 struct hid_field *field, struct hid_usage *usage,
 684                 unsigned long **bit, int *max, struct mt_application *app)
 685 {
 686         struct mt_device *td = hid_get_drvdata(hdev);
 687         struct mt_class *cls = &td->mtclass;
 688         int code;
 689         struct hid_usage *prev_usage = NULL;
 690
 691         /*
 692          * Model touchscreens providing buttons as touchpads.
 693          */
 694         if (field->application == HID_DG_TOUCHSCREEN &&
 695             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 696                 app->mt_flags |= INPUT_MT_POINTER;
 697                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 698         }
 699
 700         /* count the buttons on touchpads */
 701         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 702                 app->buttons_count++;
 703
 704         if (usage->usage_index)
 705                 prev_usage = &field->usage[usage->usage_index - 1];
 706
 707         switch (usage->hid & HID_USAGE_PAGE) {
 708
 709         case HID_UP_GENDESK:
 710                 switch (usage->hid) {
 711                 case HID_GD_X:
 712                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 713                                 code = ABS_MT_TOOL_X;
 714                                 MT_STORE_FIELD(cx);
 715                         } else {
 716                                 code = ABS_MT_POSITION_X;
 717                                 MT_STORE_FIELD(x);
 718                         }
 719
 720                         set_abs(hi->input, code, field, cls->sn_move);
 721
 722                         /*
 723                          * A system multi-axis that exports X and Y has a high
 724                          * chance of being used directly on a surface
 725                          */
 726                         if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
 727                                 __set_bit(INPUT_PROP_DIRECT,
 728                                           hi->input->propbit);
 729                                 input_set_abs_params(hi->input,
 730                                                      ABS_MT_TOOL_TYPE,
 731                                                      MT_TOOL_DIAL,
 732                                                      MT_TOOL_DIAL, 0, 0);
 733                         }
 734
 735                         return 1;
 736                 case HID_GD_Y:
 737                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 738                                 code = ABS_MT_TOOL_Y;
 739                                 MT_STORE_FIELD(cy);
 740                         } else {
 741                                 code = ABS_MT_POSITION_Y;
 742                                 MT_STORE_FIELD(y);
 743                         }
 744
 745                         set_abs(hi->input, code, field, cls->sn_move);
 746
 747                         return 1;
 748                 }
 749                 return 0;
 750
 751         case HID_UP_DIGITIZER:
 752                 switch (usage->hid) {
 753                 case HID_DG_INRANGE:
 754                         if (app->quirks & MT_QUIRK_HOVERING) {
 755                                 input_set_abs_params(hi->input,
 756                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 757                         }
 758                         MT_STORE_FIELD(inrange_state);
 759                         return 1;
 760                 case HID_DG_CONFIDENCE:
 761                         if (cls->name == MT_CLS_WIN_8 &&
 762                                 (field->application == HID_DG_TOUCHPAD ||
 763                                  field->application == HID_DG_TOUCHSCREEN))
 764                                 app->quirks |= MT_QUIRK_CONFIDENCE;
 765
 766                         if (app->quirks & MT_QUIRK_CONFIDENCE)
 767                                 input_set_abs_params(hi->input,
 768                                                      ABS_MT_TOOL_TYPE,
 769                                                      MT_TOOL_FINGER,
 770                                                      MT_TOOL_PALM, 0, 0);
 771
 772                         MT_STORE_FIELD(confidence_state);
 773                         return 1;
 774                 case HID_DG_TIPSWITCH:
 775                         if (field->application != HID_GD_SYSTEM_MULTIAXIS)
 776                                 input_set_capability(hi->input,
 777                                                      EV_KEY, BTN_TOUCH);
 778                         MT_STORE_FIELD(tip_state);
 779                         return 1;
 780                 case HID_DG_CONTACTID:
 781                         MT_STORE_FIELD(contactid);
 782                         app->touches_by_report++;
 783                         return 1;
 784                 case HID_DG_WIDTH:
 785                         if (!(app->quirks & MT_QUIRK_NO_AREA))
 786                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 787                                         cls->sn_width);
 788                         MT_STORE_FIELD(w);
 789                         return 1;
 790                 case HID_DG_HEIGHT:
 791                         if (!(app->quirks & MT_QUIRK_NO_AREA)) {
 792                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 793                                         cls->sn_height);
 794
 795                                 /*
 796                                  * Only set ABS_MT_ORIENTATION if it is not
 797                                  * already set by the HID_DG_AZIMUTH usage.
 798                                  */
 799                                 if (!test_bit(ABS_MT_ORIENTATION,
 800                                                 hi->input->absbit))
 801                                         input_set_abs_params(hi->input,
 802                                                 ABS_MT_ORIENTATION, 0, 1, 0, 0);
 803                         }
 804                         MT_STORE_FIELD(h);
 805                         return 1;
 806                 case HID_DG_TIPPRESSURE:
 807                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 808                                 cls->sn_pressure);
 809                         MT_STORE_FIELD(p);
 810                         return 1;
 811                 case HID_DG_SCANTIME:
 812                         input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
 813                         app->scantime = &field->value[usage->usage_index];
 814                         app->scantime_logical_max = field->logical_maximum;
 815                         return 1;
 816                 case HID_DG_CONTACTCOUNT:
 817                         app->have_contact_count = true;
 818                         app->raw_cc = &field->value[usage->usage_index];
 819                         return 1;
 820                 case HID_DG_AZIMUTH:
 821                         /*
 822                          * Azimuth has the range of [0, MAX) representing a full
 823                          * revolution. Set ABS_MT_ORIENTATION to a quarter of
 824                          * MAX according the definition of ABS_MT_ORIENTATION
 825                          */
 826                         input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
 827                                 -field->logical_maximum / 4,
 828                                 field->logical_maximum / 4,
 829                                 cls->sn_move ?
 830                                 field->logical_maximum / cls->sn_move : 0, 0);
 831                         MT_STORE_FIELD(a);
 832                         return 1;
 833                 case HID_DG_CONTACTMAX:
 834                         /* contact max are global to the report */
 835                         return -1;
 836                 case HID_DG_TOUCH:
 837                         /* Legacy devices use TIPSWITCH and not TOUCH.
 838                          * Let's just ignore this field. */
 839                         return -1;
 840                 }
 841                 /* let hid-input decide for the others */
 842                 return 0;
 843
 844         case HID_UP_BUTTON:
 845                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 846                 /*
 847                  * MS PTP spec says that external buttons left and right have
 848                  * usages 2 and 3.
 849                  */
 850                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
 851                     field->application == HID_DG_TOUCHPAD &&
 852                     (usage->hid & HID_USAGE) > 1)
 853                         code--;
 854
 855                 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
 856                         code = BTN_0  + ((usage->hid - 1) & HID_USAGE);
 857
 858                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 859                 if (!*bit)
 860                         return -1;
 861                 input_set_capability(hi->input, EV_KEY, code);
 862                 return 1;
 863
 864         case 0xff000000:
 865                 /* we do not want to map these: no input-oriented meaning */
 866                 return -1;
 867         }
 868
 869         return 0;
 870 }
 871
 872 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
 873                            struct mt_usages *slot,
 874                            struct input_dev *input)
 875 {
 876         __s32 quirks = app->quirks;
 877
 878         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 879                 return *slot->contactid;
 880
 881         if (quirks & MT_QUIRK_CYPRESS)
 882                 return cypress_compute_slot(app, slot);
 883
 884         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 885                 return app->num_received;
 886
 887         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 888                 return *slot->contactid - 1;
 889
 890         return input_mt_get_slot_by_key(input, *slot->contactid);
 891 }
 892
 893 static void mt_release_pending_palms(struct mt_device *td,
 894                                      struct mt_application *app,
 895                                      struct input_dev *input)
 896 {
 897         int slotnum;
 898         bool need_sync = false;
 899
 900         for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
 901                 clear_bit(slotnum, app->pending_palm_slots);
 902
 903                 input_mt_slot(input, slotnum);
 904                 input_mt_report_slot_inactive(input);
 905
 906                 need_sync = true;
 907         }
 908
 909         if (need_sync) {
 910                 input_mt_sync_frame(input);
 911                 input_sync(input);
 912         }
 913 }
 914
 915 /*
 916  * this function is called when a whole packet has been received and processed,
 917  * so that it can decide what to send to the input layer.
 918  */
 919 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
 920                           struct input_dev *input)
 921 {
 922         if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
 923                 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
 924
 925         input_mt_sync_frame(input);
 926         input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
 927         input_sync(input);
 928
 929         mt_release_pending_palms(td, app, input);
 930
 931         app->num_received = 0;
 932         app->left_button_state = 0;
 933
 934         if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
 935                 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 936         else
 937                 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 938         clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 939 }
 940
 941 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
 942 {
 943         long delta = value - app->prev_scantime;
 944         unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
 945
 946         app->jiffies = jiffies;
 947
 948         if (delta < 0)
 949                 delta += app->scantime_logical_max;
 950
 951         /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
 952         delta *= 100;
 953
 954         if (jdelta > MAX_TIMESTAMP_INTERVAL)
 955                 /* No data received for a while, resync the timestamp. */
 956                 return 0;
 957         else
 958                 return app->timestamp + delta;
 959 }
 960
 961 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 962                                 struct hid_usage *usage, __s32 value)
 963 {
 964         /* we will handle the hidinput part later, now remains hiddev */
 965         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 966                 hid->hiddev_hid_event(hid, field, usage, value);
 967
 968         return 1;
 969 }
 970
 971 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
 972                             struct mt_application *app,
 973                             struct mt_usages *slot)
 974 {
 975         struct input_mt *mt = input->mt;
 976         __s32 quirks = app->quirks;
 977         bool valid = true;
 978         bool confidence_state = true;
 979         bool inrange_state = false;
 980         int active;
 981         int slotnum;
 982         int tool = MT_TOOL_FINGER;
 983
 984         if (!slot)
 985                 return -EINVAL;
 986
 987         if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 988             app->num_received >= app->num_expected)
 989                 return -EAGAIN;
 990
 991         if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
 992                 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 993                         valid = *slot->inrange_state;
 994                 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 995                         valid = *slot->tip_state;
 996                 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 997                         valid = *slot->confidence_state;
 998
 999                 if (!valid)
1000                         return 0;
1001         }
1002
1003         slotnum = mt_compute_slot(td, app, slot, input);
1004         if (slotnum < 0 || slotnum >= td->maxcontacts)
1005                 return 0;
1006
1007         if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1008                 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1009
1010                 if (input_mt_is_active(i_slot) &&
1011                     input_mt_is_used(mt, i_slot))
1012                         return -EAGAIN;
1013         }
1014
1015         if (quirks & MT_QUIRK_CONFIDENCE)
1016                 confidence_state = *slot->confidence_state;
1017
1018         if (quirks & MT_QUIRK_HOVERING)
1019                 inrange_state = *slot->inrange_state;
1020
1021         active = *slot->tip_state || inrange_state;
1022
1023         if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1024                 tool = MT_TOOL_DIAL;
1025         else if (unlikely(!confidence_state)) {
1026                 tool = MT_TOOL_PALM;
1027                 if (!active && mt &&
1028                     input_mt_is_active(&mt->slots[slotnum])) {
1029                         /*
1030                          * The non-confidence was reported for
1031                          * previously valid contact that is also no
1032                          * longer valid. We can't simply report
1033                          * lift-off as userspace will not be aware
1034                          * of non-confidence, so we need to split
1035                          * it into 2 events: active MT_TOOL_PALM
1036                          * and a separate liftoff.
1037                          */
1038                         active = true;
1039                         set_bit(slotnum, app->pending_palm_slots);
1040                 }
1041         }
1042
1043         input_mt_slot(input, slotnum);
1044         input_mt_report_slot_state(input, tool, active);
1045         if (active) {
1046                 /* this finger is in proximity of the sensor */
1047                 int wide = (*slot->w > *slot->h);
1048                 int major = max(*slot->w, *slot->h);
1049                 int minor = min(*slot->w, *slot->h);
1050                 int orientation = wide;
1051                 int max_azimuth;
1052                 int azimuth;
1053
1054                 if (slot->a != DEFAULT_ZERO) {
1055                         /*
1056                          * Azimuth is counter-clockwise and ranges from [0, MAX)
1057                          * (a full revolution). Convert it to clockwise ranging
1058                          * [-MAX/2, MAX/2].
1059                          *
1060                          * Note that ABS_MT_ORIENTATION require us to report
1061                          * the limit of [-MAX/4, MAX/4], but the value can go
1062                          * out of range to [-MAX/2, MAX/2] to report an upside
1063                          * down ellipsis.
1064                          */
1065                         azimuth = *slot->a;
1066                         max_azimuth = input_abs_get_max(input,
1067                                                         ABS_MT_ORIENTATION);
1068                         if (azimuth > max_azimuth * 2)
1069                                 azimuth -= max_azimuth * 4;
1070                         orientation = -azimuth;
1071                 }
1072
1073                 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1074                         /*
1075                          * divided by two to match visual scale of touch
1076                          * for devices with this quirk
1077                          */
1078                         major = major >> 1;
1079                         minor = minor >> 1;
1080                 }
1081
1082                 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
1083                 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
1084                 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
1085                 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
1086                 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1087                 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1088                 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1089                 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1090                 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1091
1092                 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1093         }
1094
1095         return 0;
1096 }
1097
1098 static void mt_process_mt_event(struct hid_device *hid,
1099                                 struct mt_application *app,
1100                                 struct hid_field *field,
1101                                 struct hid_usage *usage,
1102                                 __s32 value,
1103                                 bool first_packet)
1104 {
1105         __s32 quirks = app->quirks;
1106         struct input_dev *input = field->hidinput->input;
1107
1108         if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1109                 return;
1110
1111         if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1112
1113                 /*
1114                  * For Win8 PTP touchpads we should only look at
1115                  * non finger/touch events in the first_packet of a
1116                  * (possible) multi-packet frame.
1117                  */
1118                 if (!first_packet)
1119                         return;
1120
1121                 /*
1122                  * For Win8 PTP touchpads we map both the clickpad click
1123                  * and any "external" left buttons to BTN_LEFT if a
1124                  * device claims to have both we need to report 1 for
1125                  * BTN_LEFT if either is pressed, so we or all values
1126                  * together and report the result in mt_sync_frame().
1127                  */
1128                 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1129                         app->left_button_state |= value;
1130                         return;
1131                 }
1132         }
1133
1134         input_event(input, usage->type, usage->code, value);
1135 }
1136
1137 static void mt_touch_report(struct hid_device *hid,
1138                             struct mt_report_data *rdata)
1139 {
1140         struct mt_device *td = hid_get_drvdata(hid);
1141         struct hid_report *report = rdata->report;
1142         struct mt_application *app = rdata->application;
1143         struct hid_field *field;
1144         struct input_dev *input;
1145         struct mt_usages *slot;
1146         bool first_packet;
1147         unsigned count;
1148         int r, n;
1149         int scantime = 0;
1150         int contact_count = -1;
1151
1152         /* sticky fingers release in progress, abort */
1153         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1154                 return;
1155
1156         scantime = *app->scantime;
1157         app->timestamp = mt_compute_timestamp(app, scantime);
1158         if (app->raw_cc != DEFAULT_ZERO)
1159                 contact_count = *app->raw_cc;
1160
1161         /*
1162          * Includes multi-packet support where subsequent
1163          * packets are sent with zero contactcount.
1164          */
1165         if (contact_count >= 0) {
1166                 /*
1167                  * For Win8 PTPs the first packet (td->num_received == 0) may
1168                  * have a contactcount of 0 if there only is a button event.
1169                  * We double check that this is not a continuation packet
1170                  * of a possible multi-packet frame be checking that the
1171                  * timestamp has changed.
1172                  */
1173                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1174                     app->num_received == 0 &&
1175                     app->prev_scantime != scantime)
1176                         app->num_expected = contact_count;
1177                 /* A non 0 contact count always indicates a first packet */
1178                 else if (contact_count)
1179                         app->num_expected = contact_count;
1180         }
1181         app->prev_scantime = scantime;
1182
1183         first_packet = app->num_received == 0;
1184
1185         input = report->field[0]->hidinput->input;
1186
1187         list_for_each_entry(slot, &app->mt_usages, list) {
1188                 if (!mt_process_slot(td, input, app, slot))
1189                         app->num_received++;
1190         }
1191
1192         for (r = 0; r < report->maxfield; r++) {
1193                 field = report->field[r];
1194                 count = field->report_count;
1195
1196                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1197                         continue;
1198
1199                 for (n = 0; n < count; n++)
1200                         mt_process_mt_event(hid, app, field,
1201                                             &field->usage[n], field->value[n],
1202                                             first_packet);
1203         }
1204
1205         if (app->num_received >= app->num_expected)
1206                 mt_sync_frame(td, app, input);
1207
1208         /*
1209          * Windows 8 specs says 2 things:
1210          * - once a contact has been reported, it has to be reported in each
1211          *   subsequent report
1212          * - the report rate when fingers are present has to be at least
1213          *   the refresh rate of the screen, 60 or 120 Hz
1214          *
1215          * I interprete this that the specification forces a report rate of
1216          * at least 60 Hz for a touchscreen to be certified.
1217          * Which means that if we do not get a report whithin 16 ms, either
1218          * something wrong happens, either the touchscreen forgets to send
1219          * a release. Taking a reasonable margin allows to remove issues
1220          * with USB communication or the load of the machine.
1221          *
1222          * Given that Win 8 devices are forced to send a release, this will
1223          * only affect laggish machines and the ones that have a firmware
1224          * defect.
1225          */
1226         if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1227                 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1228                         mod_timer(&td->release_timer,
1229                                   jiffies + msecs_to_jiffies(100));
1230                 else
1231                         del_timer(&td->release_timer);
1232         }
1233
1234         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1235 }
1236
1237 static int mt_touch_input_configured(struct hid_device *hdev,
1238                                      struct hid_input *hi,
1239                                      struct mt_application *app)
1240 {
1241         struct mt_device *td = hid_get_drvdata(hdev);
1242         struct mt_class *cls = &td->mtclass;
1243         struct input_dev *input = hi->input;
1244         int ret;
1245
1246         if (!td->maxcontacts)
1247                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1248
1249         mt_post_parse(td, app);
1250         if (td->serial_maybe)
1251                 mt_post_parse_default_settings(td, app);
1252
1253         if (cls->is_indirect)
1254                 app->mt_flags |= INPUT_MT_POINTER;
1255
1256         if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1257                 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1258
1259         /* check for clickpads */
1260         if ((app->mt_flags & INPUT_MT_POINTER) &&
1261             (app->buttons_count == 1))
1262                 td->is_buttonpad = true;
1263
1264         if (td->is_buttonpad)
1265                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1266
1267         app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1268                                                BITS_TO_LONGS(td->maxcontacts),
1269                                                sizeof(long),
1270                                                GFP_KERNEL);
1271         if (!app->pending_palm_slots)
1272                 return -ENOMEM;
1273
1274         ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1275         if (ret)
1276                 return ret;
1277
1278         app->mt_flags = 0;
1279         return 0;
1280 }
1281
1282 #define mt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, \
1283                                                     max, EV_KEY, (c))
1284 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1285                 struct hid_field *field, struct hid_usage *usage,
1286                 unsigned long **bit, int *max)
1287 {
1288         struct mt_device *td = hid_get_drvdata(hdev);
1289         struct mt_application *application;
1290         struct mt_report_data *rdata;
1291
1292         rdata = mt_find_report_data(td, field->report);
1293         if (!rdata) {
1294                 hid_err(hdev, "failed to allocate data for report\n");
1295                 return 0;
1296         }
1297
1298         application = rdata->application;
1299
1300         /*
1301          * If mtclass.export_all_inputs is not set, only map fields from
1302          * TouchScreen or TouchPad collections. We need to ignore fields
1303          * that belong to other collections such as Mouse that might have
1304          * the same GenericDesktop usages.
1305          */
1306         if (!td->mtclass.export_all_inputs &&
1307             field->application != HID_DG_TOUCHSCREEN &&
1308             field->application != HID_DG_PEN &&
1309             field->application != HID_DG_TOUCHPAD &&
1310             field->application != HID_GD_KEYBOARD &&
1311             field->application != HID_GD_SYSTEM_CONTROL &&
1312             field->application != HID_CP_CONSUMER_CONTROL &&
1313             field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1314             field->application != HID_GD_SYSTEM_MULTIAXIS &&
1315             !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1316               application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1317                 return -1;
1318
1319         /*
1320          * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1321          * touchpad report descriptor. We need to treat these as an array to
1322          * map usages to input keys.
1323          */
1324         if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1325             application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1326             (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1327                 set_bit(EV_REP, hi->input->evbit);
1328                 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1329                         field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1330                 switch (usage->hid & HID_USAGE) {
1331                 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);        break;
1332                 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);          break;
1333                 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);           break;
1334                 case 0x6b: mt_map_key_clear(KEY_F21);                   break;
1335                 case 0x6c: mt_map_key_clear(KEY_SLEEP);                 break;
1336                 default:
1337                         return -1;
1338                 }
1339                 return 1;
1340         }
1341
1342         if (rdata->is_mt_collection)
1343                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1344                                               application);
1345
1346         /*
1347          * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1348          * for the stylus. Overwrite the hid_input application
1349          */
1350         if (field->physical == HID_DG_STYLUS)
1351                 hi->application = HID_DG_STYLUS;
1352
1353         /* let hid-core decide for the others */
1354         return 0;
1355 }
1356
1357 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1358                 struct hid_field *field, struct hid_usage *usage,
1359                 unsigned long **bit, int *max)
1360 {
1361         struct mt_device *td = hid_get_drvdata(hdev);
1362         struct mt_report_data *rdata;
1363
1364         rdata = mt_find_report_data(td, field->report);
1365         if (rdata && rdata->is_mt_collection) {
1366                 /* We own these mappings, tell hid-input to ignore them */
1367                 return -1;
1368         }
1369
1370         /* let hid-core decide for the others */
1371         return 0;
1372 }
1373
1374 static int mt_event(struct hid_device *hid, struct hid_field *field,
1375                                 struct hid_usage *usage, __s32 value)
1376 {
1377         struct mt_device *td = hid_get_drvdata(hid);
1378         struct mt_report_data *rdata;
1379
1380         rdata = mt_find_report_data(td, field->report);
1381         if (rdata && rdata->is_mt_collection)
1382                 return mt_touch_event(hid, field, usage, value);
1383
1384         return 0;
1385 }
1386
1387 static void mt_report(struct hid_device *hid, struct hid_report *report)
1388 {
1389         struct mt_device *td = hid_get_drvdata(hid);
1390         struct hid_field *field = report->field[0];
1391         struct mt_report_data *rdata;
1392
1393         if (!(hid->claimed & HID_CLAIMED_INPUT))
1394                 return;
1395
1396         rdata = mt_find_report_data(td, report);
1397         if (rdata && rdata->is_mt_collection)
1398                 return mt_touch_report(hid, rdata);
1399
1400         if (field && field->hidinput && field->hidinput->input)
1401                 input_sync(field->hidinput->input);
1402 }
1403
1404 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1405                                      struct hid_field *field,
1406                                      struct hid_usage *usage,
1407                                      enum latency_mode latency,
1408                                      bool surface_switch,
1409                                      bool button_switch,
1410                                      bool *inputmode_found)
1411 {
1412         struct mt_device *td = hid_get_drvdata(hdev);
1413         struct mt_class *cls = &td->mtclass;
1414         struct hid_report *report = field->report;
1415         unsigned int index = usage->usage_index;
1416         char *buf;
1417         u32 report_len;
1418         int max;
1419
1420         switch (usage->hid) {
1421         case HID_DG_INPUTMODE:
1422                 /*
1423                  * Some elan panels wrongly declare 2 input mode features,
1424                  * and silently ignore when we set the value in the second
1425                  * field. Skip the second feature and hope for the best.
1426                  */
1427                 if (*inputmode_found)
1428                         return false;
1429
1430                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1431                         report_len = hid_report_len(report);
1432                         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1433                         if (!buf) {
1434                                 hid_err(hdev,
1435                                         "failed to allocate buffer for report\n");
1436                                 return false;
1437                         }
1438                         hid_hw_raw_request(hdev, report->id, buf, report_len,
1439                                            HID_FEATURE_REPORT,
1440                                            HID_REQ_GET_REPORT);
1441                         kfree(buf);
1442                 }
1443
1444                 field->value[index] = td->inputmode_value;
1445                 *inputmode_found = true;
1446                 return true;
1447
1448         case HID_DG_CONTACTMAX:
1449                 if (cls->maxcontacts) {
1450                         max = min_t(int, field->logical_maximum,
1451                                     cls->maxcontacts);
1452                         if (field->value[index] != max) {
1453                                 field->value[index] = max;
1454                                 return true;
1455                         }
1456                 }
1457                 break;
1458
1459         case HID_DG_LATENCYMODE:
1460                 field->value[index] = latency;
1461                 return true;
1462
1463         case HID_DG_SURFACESWITCH:
1464                 field->value[index] = surface_switch;
1465                 return true;
1466
1467         case HID_DG_BUTTONSWITCH:
1468                 field->value[index] = button_switch;
1469                 return true;
1470         }
1471
1472         return false; /* no need to update the report */
1473 }
1474
1475 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1476                          bool surface_switch, bool button_switch)
1477 {
1478         struct hid_report_enum *rep_enum;
1479         struct hid_report *rep;
1480         struct hid_usage *usage;
1481         int i, j;
1482         bool update_report;
1483         bool inputmode_found = false;
1484
1485         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1486         list_for_each_entry(rep, &rep_enum->report_list, list) {
1487                 update_report = false;
1488
1489                 for (i = 0; i < rep->maxfield; i++) {
1490                         /* Ignore if report count is out of bounds. */
1491                         if (rep->field[i]->report_count < 1)
1492                                 continue;
1493
1494                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1495                                 usage = &rep->field[i]->usage[j];
1496
1497                                 if (mt_need_to_apply_feature(hdev,
1498                                                              rep->field[i],
1499                                                              usage,
1500                                                              latency,
1501                                                              surface_switch,
1502                                                              button_switch,
1503                                                              &inputmode_found))
1504                                         update_report = true;
1505                         }
1506                 }
1507
1508                 if (update_report)
1509                         hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1510         }
1511 }
1512
1513 static void mt_post_parse_default_settings(struct mt_device *td,
1514                                            struct mt_application *app)
1515 {
1516         __s32 quirks = app->quirks;
1517
1518         /* unknown serial device needs special quirks */
1519         if (list_is_singular(&app->mt_usages)) {
1520                 quirks |= MT_QUIRK_ALWAYS_VALID;
1521                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1522                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1523                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1524                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1525         }
1526
1527         app->quirks = quirks;
1528 }
1529
1530 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1531 {
1532         if (!app->have_contact_count)
1533                 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1534 }
1535
1536 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1537 {
1538         struct mt_device *td = hid_get_drvdata(hdev);
1539         char *name;
1540         const char *suffix = NULL;
1541         struct mt_report_data *rdata;
1542         struct mt_application *mt_application = NULL;
1543         struct hid_report *report;
1544         int ret;
1545
1546         list_for_each_entry(report, &hi->reports, hidinput_list) {
1547                 rdata = mt_find_report_data(td, report);
1548                 if (!rdata) {
1549                         hid_err(hdev, "failed to allocate data for report\n");
1550                         return -ENOMEM;
1551                 }
1552
1553                 mt_application = rdata->application;
1554
1555                 if (rdata->is_mt_collection) {
1556                         ret = mt_touch_input_configured(hdev, hi,
1557                                                         mt_application);
1558                         if (ret)
1559                                 return ret;
1560                 }
1561         }
1562
1563         switch (hi->application) {
1564         case HID_GD_KEYBOARD:
1565         case HID_GD_KEYPAD:
1566         case HID_GD_MOUSE:
1567         case HID_DG_TOUCHPAD:
1568         case HID_GD_SYSTEM_CONTROL:
1569         case HID_CP_CONSUMER_CONTROL:
1570         case HID_GD_WIRELESS_RADIO_CTLS:
1571         case HID_GD_SYSTEM_MULTIAXIS:
1572                 /* already handled by hid core */
1573                 break;
1574         case HID_DG_TOUCHSCREEN:
1575                 /* we do not set suffix = "Touchscreen" */
1576                 hi->input->name = hdev->name;
1577                 break;
1578         case HID_DG_STYLUS:
1579                 /* force BTN_STYLUS to allow tablet matching in udev */
1580                 __set_bit(BTN_STYLUS, hi->input->keybit);
1581                 break;
1582         case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1583                 suffix = "Custom Media Keys";
1584                 break;
1585         case HID_DG_PEN:
1586                 suffix = "Stylus";
1587                 break;
1588         default:
1589                 suffix = "UNKNOWN";
1590                 break;
1591         }
1592
1593         if (suffix) {
1594                 name = devm_kzalloc(&hi->input->dev,
1595                                     strlen(hdev->name) + strlen(suffix) + 2,
1596                                     GFP_KERNEL);
1597                 if (name) {
1598                         sprintf(name, "%s %s", hdev->name, suffix);
1599                         hi->input->name = name;
1600                 }
1601         }
1602
1603         return 0;
1604 }
1605
1606 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1607 {
1608         if (field->usage[0].hid != usage ||
1609             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1610                 return;
1611
1612         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1613         field->flags |= HID_MAIN_ITEM_VARIABLE;
1614 }
1615
1616 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1617 {
1618         struct hid_report *report;
1619         int i;
1620
1621         list_for_each_entry(report,
1622                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1623                             list) {
1624
1625                 if (!report->maxfield)
1626                         continue;
1627
1628                 for (i = 0; i < report->maxfield; i++)
1629                         if (report->field[i]->maxusage >= 1)
1630                                 mt_fix_const_field(report->field[i], usage);
1631         }
1632 }
1633
1634 static void mt_release_contacts(struct hid_device *hid)
1635 {
1636         struct hid_input *hidinput;
1637         struct mt_application *application;
1638         struct mt_device *td = hid_get_drvdata(hid);
1639
1640         list_for_each_entry(hidinput, &hid->inputs, list) {
1641                 struct input_dev *input_dev = hidinput->input;
1642                 struct input_mt *mt = input_dev->mt;
1643                 int i;
1644
1645                 if (mt) {
1646                         for (i = 0; i < mt->num_slots; i++) {
1647                                 input_mt_slot(input_dev, i);
1648                                 input_mt_report_slot_inactive(input_dev);
1649                         }
1650                         input_mt_sync_frame(input_dev);
1651                         input_sync(input_dev);
1652                 }
1653         }
1654
1655         list_for_each_entry(application, &td->applications, list) {
1656                 application->num_received = 0;
1657         }
1658 }
1659
1660 static void mt_expired_timeout(struct timer_list *t)
1661 {
1662         struct mt_device *td = from_timer(td, t, release_timer);
1663         struct hid_device *hdev = td->hdev;
1664
1665         /*
1666          * An input report came in just before we release the sticky fingers,
1667          * it will take care of the sticky fingers.
1668          */
1669         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1670                 return;
1671         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1672                 mt_release_contacts(hdev);
1673         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1674 }
1675
1676 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1677 {
1678         int ret, i;
1679         struct mt_device *td;
1680         const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1681
1682         for (i = 0; mt_classes[i].name ; i++) {
1683                 if (id->driver_data == mt_classes[i].name) {
1684                         mtclass = &(mt_classes[i]);
1685                         break;
1686                 }
1687         }
1688
1689         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1690         if (!td) {
1691                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1692                 return -ENOMEM;
1693         }
1694         td->hdev = hdev;
1695         td->mtclass = *mtclass;
1696         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1697         hid_set_drvdata(hdev, td);
1698
1699         INIT_LIST_HEAD(&td->applications);
1700         INIT_LIST_HEAD(&td->reports);
1701
1702         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1703                 td->serial_maybe = true;
1704
1705         /* This allows the driver to correctly support devices
1706          * that emit events over several HID messages.
1707          */
1708         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1709
1710         /*
1711          * This allows the driver to handle different input sensors
1712          * that emits events through different applications on the same HID
1713          * device.
1714          */
1715         hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1716
1717         if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1718                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1719
1720         if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1721                 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1722                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1723         }
1724
1725         timer_setup(&td->release_timer, mt_expired_timeout, 0);
1726
1727         ret = hid_parse(hdev);
1728         if (ret != 0)
1729                 return ret;
1730
1731         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1732                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1733
1734         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1735         if (ret)
1736                 return ret;
1737
1738         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1739         if (ret)
1740                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1741                                 hdev->name);
1742
1743         mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1744
1745         return 0;
1746 }
1747
1748 #ifdef CONFIG_PM
1749 static int mt_reset_resume(struct hid_device *hdev)
1750 {
1751         mt_release_contacts(hdev);
1752         mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1753         return 0;
1754 }
1755
1756 static int mt_resume(struct hid_device *hdev)
1757 {
1758         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1759          * It should be safe to send it to other devices too.
1760          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1761
1762         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1763
1764         return 0;
1765 }
1766 #endif
1767
1768 static void mt_remove(struct hid_device *hdev)
1769 {
1770         struct mt_device *td = hid_get_drvdata(hdev);
1771
1772         del_timer_sync(&td->release_timer);
1773
1774         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1775         hid_hw_stop(hdev);
1776 }
1777
1778 /*
1779  * This list contains only:
1780  * - VID/PID of products not working with the default multitouch handling
1781  * - 2 generic rules.
1782  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1783  */
1784 static const struct hid_device_id mt_devices[] = {
1785
1786         /* 3M panels */
1787         { .driver_data = MT_CLS_3M,
1788                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1789                         USB_DEVICE_ID_3M1968) },
1790         { .driver_data = MT_CLS_3M,
1791                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1792                         USB_DEVICE_ID_3M2256) },
1793         { .driver_data = MT_CLS_3M,
1794                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1795                         USB_DEVICE_ID_3M3266) },
1796
1797         /* Anton devices */
1798         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1799                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1800                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1801
1802         /* Asus T304UA */
1803         { .driver_data = MT_CLS_ASUS,
1804                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1805                         USB_VENDOR_ID_ASUSTEK,
1806                         USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1807
1808         /* Atmel panels */
1809         { .driver_data = MT_CLS_SERIAL,
1810                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1811                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1812
1813         /* Baanto multitouch devices */
1814         { .driver_data = MT_CLS_NSMU,
1815                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1816                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1817
1818         /* Cando panels */
1819         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1820                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1821                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1822         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1823                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1824                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1825
1826         /* Chunghwa Telecom touch panels */
1827         {  .driver_data = MT_CLS_NSMU,
1828                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1829                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1830
1831         /* CJTouch panels */
1832         { .driver_data = MT_CLS_NSMU,
1833                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1834                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1835         { .driver_data = MT_CLS_NSMU,
1836                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1837                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1838
1839         /* CVTouch panels */
1840         { .driver_data = MT_CLS_NSMU,
1841                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1842                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1843
1844         /* eGalax devices (resistive) */
1845         { .driver_data = MT_CLS_EGALAX,
1846                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1847                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1848         { .driver_data = MT_CLS_EGALAX,
1849                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1850                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1851
1852         /* eGalax devices (capacitive) */
1853         { .driver_data = MT_CLS_EGALAX_SERIAL,
1854                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1855                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1856         { .driver_data = MT_CLS_EGALAX,
1857                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1858                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1859         { .driver_data = MT_CLS_EGALAX_SERIAL,
1860                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1861                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1862         { .driver_data = MT_CLS_EGALAX_SERIAL,
1863                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1864                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1865         { .driver_data = MT_CLS_EGALAX_SERIAL,
1866                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1867                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1868         { .driver_data = MT_CLS_EGALAX_SERIAL,
1869                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1870                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1871         { .driver_data = MT_CLS_EGALAX,
1872                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1873                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1874         { .driver_data = MT_CLS_EGALAX,
1875                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1876                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1877         { .driver_data = MT_CLS_EGALAX_SERIAL,
1878                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1879                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1880         { .driver_data = MT_CLS_EGALAX,
1881                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1882                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1883         { .driver_data = MT_CLS_EGALAX,
1884                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1885                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1886         { .driver_data = MT_CLS_EGALAX,
1887                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1888                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1889         { .driver_data = MT_CLS_EGALAX,
1890                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1891                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1892         { .driver_data = MT_CLS_EGALAX_SERIAL,
1893                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1894                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1895         { .driver_data = MT_CLS_EGALAX_SERIAL,
1896                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1897                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1898         { .driver_data = MT_CLS_EGALAX_SERIAL,
1899                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1900                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1901         { .driver_data = MT_CLS_EGALAX,
1902                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1903                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1904
1905         /* Elan devices */
1906         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1907                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1908                         USB_VENDOR_ID_ELAN, 0x313a) },
1909
1910         /* Elitegroup panel */
1911         { .driver_data = MT_CLS_SERIAL,
1912                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1913                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1914
1915         /* Flatfrog Panels */
1916         { .driver_data = MT_CLS_FLATFROG,
1917                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1918                         USB_DEVICE_ID_MULTITOUCH_3200) },
1919
1920         /* FocalTech Panels */
1921         { .driver_data = MT_CLS_SERIAL,
1922                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1923                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1924
1925         /* GeneralTouch panel */
1926         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1927                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1928                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1929         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1930                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1931                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1932         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1933                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1934                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1935         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1936                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1937                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1938         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1939                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1940                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1941         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1942                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1943                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1944         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1945                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1946                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1947
1948         /* Gametel game controller */
1949         { .driver_data = MT_CLS_NSMU,
1950                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1951                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1952
1953         /* GoodTouch panels */
1954         { .driver_data = MT_CLS_NSMU,
1955                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1956                         USB_DEVICE_ID_GOODTOUCH_000f) },
1957
1958         /* Hanvon panels */
1959         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1960                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1961                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1962
1963         /* Ilitek dual touch panel */
1964         {  .driver_data = MT_CLS_NSMU,
1965                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1966                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1967
1968         /* LG Melfas panel */
1969         { .driver_data = MT_CLS_LG,
1970                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1971                         USB_DEVICE_ID_LG_MELFAS_MT) },
1972         { .driver_data = MT_CLS_LG,
1973                 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
1974                         USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
1975
1976         /* Lenovo X1 TAB Gen 2 */
1977         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1978                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1979                            USB_VENDOR_ID_LENOVO,
1980                            USB_DEVICE_ID_LENOVO_X1_TAB) },
1981
1982         /* Lenovo X1 TAB Gen 3 */
1983         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1984                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1985                            USB_VENDOR_ID_LENOVO,
1986                            USB_DEVICE_ID_LENOVO_X1_TAB3) },
1987
1988         /* MosArt panels */
1989         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1990                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1991                         USB_DEVICE_ID_ASUS_T91MT)},
1992         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1993                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1994                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1995         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1996                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1997                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1998
1999         /* Novatek Panel */
2000         { .driver_data = MT_CLS_NSMU,
2001                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2002                         USB_DEVICE_ID_NOVATEK_PCT) },
2003
2004         /* Ntrig Panel */
2005         { .driver_data = MT_CLS_NSMU,
2006                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2007                         USB_VENDOR_ID_NTRIG, 0x1b05) },
2008
2009         /* Panasonic panels */
2010         { .driver_data = MT_CLS_PANASONIC,
2011                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2012                         USB_DEVICE_ID_PANABOARD_UBT780) },
2013         { .driver_data = MT_CLS_PANASONIC,
2014                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2015                         USB_DEVICE_ID_PANABOARD_UBT880) },
2016
2017         /* PixArt optical touch screen */
2018         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2019                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2020                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2021         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2022                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2023                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2024         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2025                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2026                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2027
2028         /* PixCir-based panels */
2029         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2030                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2031                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2032
2033         /* Quanta-based panels */
2034         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2035                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2036                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2037
2038         /* Razer touchpads */
2039         { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2040                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2041                         USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2042
2043         /* Smart Tech panels */
2044         { .driver_data = MT_CLS_SMART_TECH,
2045                 MT_USB_DEVICE(0x0b8c, 0x0092)},
2046
2047         /* Stantum panels */
2048         { .driver_data = MT_CLS_CONFIDENCE,
2049                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2050                         USB_DEVICE_ID_MTP_STM)},
2051
2052         /* Synaptics devices */
2053         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2054                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2055                         USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2056
2057         /* TopSeed panels */
2058         { .driver_data = MT_CLS_TOPSEED,
2059                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2060                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2061
2062         /* Touch International panels */
2063         { .driver_data = MT_CLS_NSMU,
2064                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2065                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2066
2067         /* Unitec panels */
2068         { .driver_data = MT_CLS_NSMU,
2069                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2070                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2071         { .driver_data = MT_CLS_NSMU,
2072                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2073                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2074
2075         /* VTL panels */
2076         { .driver_data = MT_CLS_VTL,
2077                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2078                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2079
2080         /* Wistron panels */
2081         { .driver_data = MT_CLS_NSMU,
2082                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2083                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2084
2085         /* XAT */
2086         { .driver_data = MT_CLS_NSMU,
2087                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2088                         USB_DEVICE_ID_XAT_CSR) },
2089
2090         /* Xiroku */
2091         { .driver_data = MT_CLS_NSMU,
2092                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2093                         USB_DEVICE_ID_XIROKU_SPX) },
2094         { .driver_data = MT_CLS_NSMU,
2095                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2096                         USB_DEVICE_ID_XIROKU_MPX) },
2097         { .driver_data = MT_CLS_NSMU,
2098                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2099                         USB_DEVICE_ID_XIROKU_CSR) },
2100         { .driver_data = MT_CLS_NSMU,
2101                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2102                         USB_DEVICE_ID_XIROKU_SPX1) },
2103         { .driver_data = MT_CLS_NSMU,
2104                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2105                         USB_DEVICE_ID_XIROKU_MPX1) },
2106         { .driver_data = MT_CLS_NSMU,
2107                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2108                         USB_DEVICE_ID_XIROKU_CSR1) },
2109         { .driver_data = MT_CLS_NSMU,
2110                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2111                         USB_DEVICE_ID_XIROKU_SPX2) },
2112         { .driver_data = MT_CLS_NSMU,
2113                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2114                         USB_DEVICE_ID_XIROKU_MPX2) },
2115         { .driver_data = MT_CLS_NSMU,
2116                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2117                         USB_DEVICE_ID_XIROKU_CSR2) },
2118
2119         /* Google MT devices */
2120         { .driver_data = MT_CLS_GOOGLE,
2121                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2122                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2123
2124         /* Generic MT device */
2125         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2126
2127         /* Generic Win 8 certified MT device */
2128         {  .driver_data = MT_CLS_WIN_8,
2129                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2130                         HID_ANY_ID, HID_ANY_ID) },
2131         { }
2132 };
2133 MODULE_DEVICE_TABLE(hid, mt_devices);
2134
2135 static const struct hid_usage_id mt_grabbed_usages[] = {
2136         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2137         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2138 };
2139
2140 static struct hid_driver mt_driver = {
2141         .name = "hid-multitouch",
2142         .id_table = mt_devices,
2143         .probe = mt_probe,
2144         .remove = mt_remove,
2145         .input_mapping = mt_input_mapping,
2146         .input_mapped = mt_input_mapped,
2147         .input_configured = mt_input_configured,
2148         .feature_mapping = mt_feature_mapping,
2149         .usage_table = mt_grabbed_usages,
2150         .event = mt_event,
2151         .report = mt_report,
2152 #ifdef CONFIG_PM
2153         .reset_resume = mt_reset_resume,
2154         .resume = mt_resume,
2155 #endif
2156 };
2157 module_hid_driver(mt_driver);