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 #define MT_QUIRK_DISABLE_WAKEUP         BIT(21)
  74 #define MT_QUIRK_ORIENTATION_INVERT     BIT(22)
  75
  76 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  77 #define MT_INPUTMODE_TOUCHPAD           0x03
  78
  79 #define MT_BUTTONTYPE_CLICKPAD          0
  80
  81 enum latency_mode {
  82         HID_LATENCY_NORMAL = 0,
  83         HID_LATENCY_HIGH = 1,
  84 };
  85
  86 #define MT_IO_FLAGS_RUNNING             0
  87 #define MT_IO_FLAGS_ACTIVE_SLOTS        1
  88 #define MT_IO_FLAGS_PENDING_SLOTS       2
  89
  90 static const bool mtrue = true;         /* default for true */
  91 static const bool mfalse;               /* default for false */
  92 static const __s32 mzero;               /* default for 0 */
  93
  94 #define DEFAULT_TRUE    ((void *)&mtrue)
  95 #define DEFAULT_FALSE   ((void *)&mfalse)
  96 #define DEFAULT_ZERO    ((void *)&mzero)
  97
  98 struct mt_usages {
  99         struct list_head list;
 100         __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
 101         __s32 *contactid;       /* the device ContactID assigned to this slot */
 102         bool *tip_state;        /* is the touch valid? */
 103         bool *inrange_state;    /* is the finger in proximity of the sensor? */
 104         bool *confidence_state; /* is the touch made by a finger? */
 105 };
 106
 107 struct mt_application {
 108         struct list_head list;
 109         unsigned int application;
 110         unsigned int report_id;
 111         struct list_head mt_usages;     /* mt usages list */
 112
 113         __s32 quirks;
 114
 115         __s32 *scantime;                /* scantime reported */
 116         __s32 scantime_logical_max;     /* max value for raw scantime */
 117
 118         __s32 *raw_cc;                  /* contact count in the report */
 119         int left_button_state;          /* left button state */
 120         unsigned int mt_flags;          /* flags to pass to input-mt */
 121
 122         unsigned long *pending_palm_slots;      /* slots where we reported palm
 123                                                  * and need to release */
 124
 125         __u8 num_received;      /* how many contacts we received */
 126         __u8 num_expected;      /* expected last contact index */
 127         __u8 buttons_count;     /* number of physical buttons per touchpad */
 128         __u8 touches_by_report; /* how many touches are present in one report:
 129                                  * 1 means we should use a serial protocol
 130                                  * > 1 means hybrid (multitouch) protocol
 131                                  */
 132
 133         __s32 dev_time;         /* the scan time provided by the device */
 134         unsigned long jiffies;  /* the frame's jiffies */
 135         int timestamp;          /* the timestamp to be sent */
 136         int prev_scantime;              /* scantime reported previously */
 137
 138         bool have_contact_count;
 139 };
 140
 141 struct mt_class {
 142         __s32 name;     /* MT_CLS */
 143         __s32 quirks;
 144         __s32 sn_move;  /* Signal/noise ratio for move events */
 145         __s32 sn_width; /* Signal/noise ratio for width events */
 146         __s32 sn_height;        /* Signal/noise ratio for height events */
 147         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 148         __u8 maxcontacts;
 149         bool is_indirect;       /* true for touchpads */
 150         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 151 };
 152
 153 struct mt_report_data {
 154         struct list_head list;
 155         struct hid_report *report;
 156         struct mt_application *application;
 157         bool is_mt_collection;
 158 };
 159
 160 struct mt_device {
 161         struct mt_class mtclass;        /* our mt device class */
 162         struct timer_list release_timer;        /* to release sticky fingers */
 163         struct hid_device *hdev;        /* hid_device we're attached to */
 164         unsigned long mt_io_flags;      /* mt flags (MT_IO_FLAGS_*) */
 165         __u8 inputmode_value;   /* InputMode HID feature value */
 166         __u8 maxcontacts;
 167         bool is_buttonpad;      /* is this device a button pad? */
 168         bool serial_maybe;      /* need to check for serial protocol */
 169
 170         struct list_head applications;
 171         struct list_head reports;
 172 };
 173
 174 static void mt_post_parse_default_settings(struct mt_device *td,
 175                                            struct mt_application *app);
 176 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
 177
 178 /* classes of device behavior */
 179 #define MT_CLS_DEFAULT                          0x0001
 180
 181 #define MT_CLS_SERIAL                           0x0002
 182 #define MT_CLS_CONFIDENCE                       0x0003
 183 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 184 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 185 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 186 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 187 /* reserved                                     0x0008 */
 188 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 189 #define MT_CLS_NSMU                             0x000a
 190 /* reserved                                     0x0010 */
 191 /* reserved                                     0x0011 */
 192 #define MT_CLS_WIN_8                            0x0012
 193 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 194 /* reserved                                     0x0014 */
 195 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT          0x0015
 196 #define MT_CLS_WIN_8_DISABLE_WAKEUP             0x0016
 197 #define MT_CLS_WIN_8_NO_STICKY_FINGERS          0x0017
 198 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU     0x0018
 199
 200 /* vendor specific classes */
 201 #define MT_CLS_3M                               0x0101
 202 /* reserved                                     0x0102 */
 203 #define MT_CLS_EGALAX                           0x0103
 204 #define MT_CLS_EGALAX_SERIAL                    0x0104
 205 #define MT_CLS_TOPSEED                          0x0105
 206 #define MT_CLS_PANASONIC                        0x0106
 207 #define MT_CLS_FLATFROG                         0x0107
 208 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 209 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 210 #define MT_CLS_LG                               0x010a
 211 #define MT_CLS_ASUS                             0x010b
 212 #define MT_CLS_VTL                              0x0110
 213 #define MT_CLS_GOOGLE                           0x0111
 214 #define MT_CLS_RAZER_BLADE_STEALTH              0x0112
 215 #define MT_CLS_SMART_TECH                       0x0113
 216
 217 #define MT_DEFAULT_MAXCONTACT   10
 218 #define MT_MAX_MAXCONTACT       250
 219
 220 /*
 221  * Resync device and local timestamps after that many microseconds without
 222  * receiving data.
 223  */
 224 #define MAX_TIMESTAMP_INTERVAL  1000000
 225
 226 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 227 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 228
 229 /*
 230  * these device-dependent functions determine what slot corresponds
 231  * to a valid contact that was just read.
 232  */
 233
 234 static int cypress_compute_slot(struct mt_application *application,
 235                                 struct mt_usages *slot)
 236 {
 237         if (*slot->contactid != 0 || application->num_received == 0)
 238                 return *slot->contactid;
 239         else
 240                 return -1;
 241 }
 242
 243 static const struct mt_class mt_classes[] = {
 244         { .name = MT_CLS_DEFAULT,
 245                 .quirks = MT_QUIRK_ALWAYS_VALID |
 246                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 247         { .name = MT_CLS_NSMU,
 248                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 249         { .name = MT_CLS_SERIAL,
 250                 .quirks = MT_QUIRK_ALWAYS_VALID},
 251         { .name = MT_CLS_CONFIDENCE,
 252                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 253         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 254                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 255                         MT_QUIRK_SLOT_IS_CONTACTID },
 256         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 257                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 258                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 259         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 260                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 261                         MT_QUIRK_SLOT_IS_CONTACTID,
 262                 .maxcontacts = 2 },
 263         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 264                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 265                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 266                 .maxcontacts = 2 },
 267         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 268                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 269                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 270         { .name = MT_CLS_WIN_8,
 271                 .quirks = MT_QUIRK_ALWAYS_VALID |
 272                         MT_QUIRK_IGNORE_DUPLICATES |
 273                         MT_QUIRK_HOVERING |
 274                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 275                         MT_QUIRK_STICKY_FINGERS |
 276                         MT_QUIRK_WIN8_PTP_BUTTONS,
 277                 .export_all_inputs = true },
 278         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 279                 .quirks = MT_QUIRK_ALWAYS_VALID |
 280                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 281                 .export_all_inputs = true },
 282         { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
 283                 .quirks = MT_QUIRK_ALWAYS_VALID |
 284                         MT_QUIRK_IGNORE_DUPLICATES |
 285                         MT_QUIRK_HOVERING |
 286                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 287                         MT_QUIRK_STICKY_FINGERS |
 288                         MT_QUIRK_WIN8_PTP_BUTTONS |
 289                         MT_QUIRK_FORCE_MULTI_INPUT,
 290                 .export_all_inputs = true },
 291         { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
 292                 .quirks = MT_QUIRK_IGNORE_DUPLICATES |
 293                         MT_QUIRK_HOVERING |
 294                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 295                         MT_QUIRK_STICKY_FINGERS |
 296                         MT_QUIRK_WIN8_PTP_BUTTONS |
 297                         MT_QUIRK_FORCE_MULTI_INPUT |
 298                         MT_QUIRK_NOT_SEEN_MEANS_UP,
 299                 .export_all_inputs = true },
 300         { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
 301                 .quirks = MT_QUIRK_ALWAYS_VALID |
 302                         MT_QUIRK_IGNORE_DUPLICATES |
 303                         MT_QUIRK_HOVERING |
 304                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 305                         MT_QUIRK_STICKY_FINGERS |
 306                         MT_QUIRK_WIN8_PTP_BUTTONS |
 307                         MT_QUIRK_DISABLE_WAKEUP,
 308                 .export_all_inputs = true },
 309         { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
 310                 .quirks = MT_QUIRK_ALWAYS_VALID |
 311                         MT_QUIRK_IGNORE_DUPLICATES |
 312                         MT_QUIRK_HOVERING |
 313                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 314                         MT_QUIRK_WIN8_PTP_BUTTONS,
 315                 .export_all_inputs = true },
 316
 317         /*
 318          * vendor specific classes
 319          */
 320         { .name = MT_CLS_3M,
 321                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 322                         MT_QUIRK_SLOT_IS_CONTACTID |
 323                         MT_QUIRK_TOUCH_SIZE_SCALING,
 324                 .sn_move = 2048,
 325                 .sn_width = 128,
 326                 .sn_height = 128,
 327                 .maxcontacts = 60,
 328         },
 329         { .name = MT_CLS_EGALAX,
 330                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 331                         MT_QUIRK_VALID_IS_INRANGE,
 332                 .sn_move = 4096,
 333                 .sn_pressure = 32,
 334         },
 335         { .name = MT_CLS_EGALAX_SERIAL,
 336                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 337                         MT_QUIRK_ALWAYS_VALID,
 338                 .sn_move = 4096,
 339                 .sn_pressure = 32,
 340         },
 341         { .name = MT_CLS_TOPSEED,
 342                 .quirks = MT_QUIRK_ALWAYS_VALID,
 343                 .is_indirect = true,
 344                 .maxcontacts = 2,
 345         },
 346         { .name = MT_CLS_PANASONIC,
 347                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 348                 .maxcontacts = 4 },
 349         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 350                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 351                         MT_QUIRK_VALID_IS_INRANGE |
 352                         MT_QUIRK_SLOT_IS_CONTACTID,
 353                 .maxcontacts = 2
 354         },
 355         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 356                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 357                         MT_QUIRK_SLOT_IS_CONTACTID
 358         },
 359
 360         { .name = MT_CLS_FLATFROG,
 361                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 362                         MT_QUIRK_NO_AREA,
 363                 .sn_move = 2048,
 364                 .maxcontacts = 40,
 365         },
 366         { .name = MT_CLS_LG,
 367                 .quirks = MT_QUIRK_ALWAYS_VALID |
 368                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 369                         MT_QUIRK_IGNORE_DUPLICATES |
 370                         MT_QUIRK_HOVERING |
 371                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 372         { .name = MT_CLS_ASUS,
 373                 .quirks = MT_QUIRK_ALWAYS_VALID |
 374                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 375                         MT_QUIRK_ASUS_CUSTOM_UP },
 376         { .name = MT_CLS_VTL,
 377                 .quirks = MT_QUIRK_ALWAYS_VALID |
 378                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 379                         MT_QUIRK_FORCE_GET_FEATURE,
 380         },
 381         { .name = MT_CLS_GOOGLE,
 382                 .quirks = MT_QUIRK_ALWAYS_VALID |
 383                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 384                         MT_QUIRK_SLOT_IS_CONTACTID |
 385                         MT_QUIRK_HOVERING
 386         },
 387         { .name = MT_CLS_RAZER_BLADE_STEALTH,
 388                 .quirks = MT_QUIRK_ALWAYS_VALID |
 389                         MT_QUIRK_IGNORE_DUPLICATES |
 390                         MT_QUIRK_HOVERING |
 391                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 392                         MT_QUIRK_WIN8_PTP_BUTTONS,
 393         },
 394         { .name = MT_CLS_SMART_TECH,
 395                 .quirks = MT_QUIRK_ALWAYS_VALID |
 396                         MT_QUIRK_IGNORE_DUPLICATES |
 397                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 398                         MT_QUIRK_SEPARATE_APP_REPORT,
 399         },
 400         { }
 401 };
 402
 403 static ssize_t mt_show_quirks(struct device *dev,
 404                            struct device_attribute *attr,
 405                            char *buf)
 406 {
 407         struct hid_device *hdev = to_hid_device(dev);
 408         struct mt_device *td = hid_get_drvdata(hdev);
 409
 410         return sprintf(buf, "%u\n", td->mtclass.quirks);
 411 }
 412
 413 static ssize_t mt_set_quirks(struct device *dev,
 414                           struct device_attribute *attr,
 415                           const char *buf, size_t count)
 416 {
 417         struct hid_device *hdev = to_hid_device(dev);
 418         struct mt_device *td = hid_get_drvdata(hdev);
 419         struct mt_application *application;
 420
 421         unsigned long val;
 422
 423         if (kstrtoul(buf, 0, &val))
 424                 return -EINVAL;
 425
 426         td->mtclass.quirks = val;
 427
 428         list_for_each_entry(application, &td->applications, list) {
 429                 application->quirks = val;
 430                 if (!application->have_contact_count)
 431                         application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 432         }
 433
 434         return count;
 435 }
 436
 437 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 438
 439 static struct attribute *sysfs_attrs[] = {
 440         &dev_attr_quirks.attr,
 441         NULL
 442 };
 443
 444 static const struct attribute_group mt_attribute_group = {
 445         .attrs = sysfs_attrs
 446 };
 447
 448 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 449 {
 450         int ret;
 451         u32 size = hid_report_len(report);
 452         u8 *buf;
 453
 454         /*
 455          * Do not fetch the feature report if the device has been explicitly
 456          * marked as non-capable.
 457          */
 458         if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
 459                 return;
 460
 461         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 462         if (!buf)
 463                 return;
 464
 465         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 466                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 467         if (ret < 0) {
 468                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 469                          report->id);
 470         } else {
 471                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 472                                            size, 0);
 473                 if (ret)
 474                         dev_warn(&hdev->dev, "failed to report feature\n");
 475         }
 476
 477         kfree(buf);
 478 }
 479
 480 static void mt_feature_mapping(struct hid_device *hdev,
 481                 struct hid_field *field, struct hid_usage *usage)
 482 {
 483         struct mt_device *td = hid_get_drvdata(hdev);
 484
 485         switch (usage->hid) {
 486         case HID_DG_CONTACTMAX:
 487                 mt_get_feature(hdev, field->report);
 488
 489                 td->maxcontacts = field->value[0];
 490                 if (!td->maxcontacts &&
 491                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 492                         td->maxcontacts = field->logical_maximum;
 493                 if (td->mtclass.maxcontacts)
 494                         /* check if the maxcontacts is given by the class */
 495                         td->maxcontacts = td->mtclass.maxcontacts;
 496
 497                 break;
 498         case HID_DG_BUTTONTYPE:
 499                 if (usage->usage_index >= field->report_count) {
 500                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 501                         break;
 502                 }
 503
 504                 mt_get_feature(hdev, field->report);
 505                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 506                         td->is_buttonpad = true;
 507
 508                 break;
 509         case 0xff0000c5:
 510                 /* Retrieve the Win8 blob once to enable some devices */
 511                 if (usage->usage_index == 0)
 512                         mt_get_feature(hdev, field->report);
 513                 break;
 514         }
 515 }
 516
 517 static void set_abs(struct input_dev *input, unsigned int code,
 518                 struct hid_field *field, int snratio)
 519 {
 520         int fmin = field->logical_minimum;
 521         int fmax = field->logical_maximum;
 522         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 523         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 524         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 525 }
 526
 527 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
 528                                            struct mt_application *application)
 529 {
 530         struct mt_usages *usage;
 531
 532         usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
 533         if (!usage)
 534                 return NULL;
 535
 536         /* set some defaults so we do not need to check for null pointers */
 537         usage->x = DEFAULT_ZERO;
 538         usage->y = DEFAULT_ZERO;
 539         usage->cx = DEFAULT_ZERO;
 540         usage->cy = DEFAULT_ZERO;
 541         usage->p = DEFAULT_ZERO;
 542         usage->w = DEFAULT_ZERO;
 543         usage->h = DEFAULT_ZERO;
 544         usage->a = DEFAULT_ZERO;
 545         usage->contactid = DEFAULT_ZERO;
 546         usage->tip_state = DEFAULT_FALSE;
 547         usage->inrange_state = DEFAULT_FALSE;
 548         usage->confidence_state = DEFAULT_TRUE;
 549
 550         list_add_tail(&usage->list, &application->mt_usages);
 551
 552         return usage;
 553 }
 554
 555 static struct mt_application *mt_allocate_application(struct mt_device *td,
 556                                                       struct hid_report *report)
 557 {
 558         unsigned int application = report->application;
 559         struct mt_application *mt_application;
 560
 561         mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
 562                                       GFP_KERNEL);
 563         if (!mt_application)
 564                 return NULL;
 565
 566         mt_application->application = application;
 567         INIT_LIST_HEAD(&mt_application->mt_usages);
 568
 569         if (application == HID_DG_TOUCHSCREEN)
 570                 mt_application->mt_flags |= INPUT_MT_DIRECT;
 571
 572         /*
 573          * Model touchscreens providing buttons as touchpads.
 574          */
 575         if (application == HID_DG_TOUCHPAD) {
 576                 mt_application->mt_flags |= INPUT_MT_POINTER;
 577                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 578         }
 579
 580         mt_application->scantime = DEFAULT_ZERO;
 581         mt_application->raw_cc = DEFAULT_ZERO;
 582         mt_application->quirks = td->mtclass.quirks;
 583         mt_application->report_id = report->id;
 584
 585         list_add_tail(&mt_application->list, &td->applications);
 586
 587         return mt_application;
 588 }
 589
 590 static struct mt_application *mt_find_application(struct mt_device *td,
 591                                                   struct hid_report *report)
 592 {
 593         unsigned int application = report->application;
 594         struct mt_application *tmp, *mt_application = NULL;
 595
 596         list_for_each_entry(tmp, &td->applications, list) {
 597                 if (application == tmp->application) {
 598                         if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
 599                             tmp->report_id == report->id) {
 600                                 mt_application = tmp;
 601                                 break;
 602                         }
 603                 }
 604         }
 605
 606         if (!mt_application)
 607                 mt_application = mt_allocate_application(td, report);
 608
 609         return mt_application;
 610 }
 611
 612 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
 613                                                       struct hid_report *report)
 614 {
 615         struct mt_report_data *rdata;
 616         struct hid_field *field;
 617         int r, n;
 618
 619         rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
 620         if (!rdata)
 621                 return NULL;
 622
 623         rdata->report = report;
 624         rdata->application = mt_find_application(td, report);
 625
 626         if (!rdata->application) {
 627                 devm_kfree(&td->hdev->dev, rdata);
 628                 return NULL;
 629         }
 630
 631         for (r = 0; r < report->maxfield; r++) {
 632                 field = report->field[r];
 633
 634                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 635                         continue;
 636
 637                 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
 638                         for (n = 0; n < field->report_count; n++) {
 639                                 if (field->usage[n].hid == HID_DG_CONTACTID) {
 640                                         rdata->is_mt_collection = true;
 641                                         break;
 642                                 }
 643                         }
 644                 }
 645         }
 646
 647         list_add_tail(&rdata->list, &td->reports);
 648
 649         return rdata;
 650 }
 651
 652 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
 653                                                   struct hid_report *report)
 654 {
 655         struct mt_report_data *tmp, *rdata = NULL;
 656
 657         list_for_each_entry(tmp, &td->reports, list) {
 658                 if (report == tmp->report) {
 659                         rdata = tmp;
 660                         break;
 661                 }
 662         }
 663
 664         if (!rdata)
 665                 rdata = mt_allocate_report_data(td, report);
 666
 667         return rdata;
 668 }
 669
 670 static void mt_store_field(struct hid_device *hdev,
 671                            struct mt_application *application,
 672                            __s32 *value,
 673                            size_t offset)
 674 {
 675         struct mt_usages *usage;
 676         __s32 **target;
 677
 678         if (list_empty(&application->mt_usages))
 679                 usage = mt_allocate_usage(hdev, application);
 680         else
 681                 usage = list_last_entry(&application->mt_usages,
 682                                         struct mt_usages,
 683                                         list);
 684
 685         if (!usage)
 686                 return;
 687
 688         target = (__s32 **)((char *)usage + offset);
 689
 690         /* the value has already been filled, create a new slot */
 691         if (*target != DEFAULT_TRUE &&
 692             *target != DEFAULT_FALSE &&
 693             *target != DEFAULT_ZERO) {
 694                 if (usage->contactid == DEFAULT_ZERO ||
 695                     usage->x == DEFAULT_ZERO ||
 696                     usage->y == DEFAULT_ZERO) {
 697                         hid_dbg(hdev,
 698                                 "ignoring duplicate usage on incomplete");
 699                         return;
 700                 }
 701                 usage = mt_allocate_usage(hdev, application);
 702                 if (!usage)
 703                         return;
 704
 705                 target = (__s32 **)((char *)usage + offset);
 706         }
 707
 708         *target = value;
 709 }
 710
 711 #define MT_STORE_FIELD(__name)                                          \
 712         mt_store_field(hdev, app,                                       \
 713                        &field->value[usage->usage_index],               \
 714                        offsetof(struct mt_usages, __name))
 715
 716 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 717                 struct hid_field *field, struct hid_usage *usage,
 718                 unsigned long **bit, int *max, struct mt_application *app)
 719 {
 720         struct mt_device *td = hid_get_drvdata(hdev);
 721         struct mt_class *cls = &td->mtclass;
 722         int code;
 723         struct hid_usage *prev_usage = NULL;
 724
 725         /*
 726          * Model touchscreens providing buttons as touchpads.
 727          */
 728         if (field->application == HID_DG_TOUCHSCREEN &&
 729             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 730                 app->mt_flags |= INPUT_MT_POINTER;
 731                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 732         }
 733
 734         /* count the buttons on touchpads */
 735         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 736                 app->buttons_count++;
 737
 738         if (usage->usage_index)
 739                 prev_usage = &field->usage[usage->usage_index - 1];
 740
 741         switch (usage->hid & HID_USAGE_PAGE) {
 742
 743         case HID_UP_GENDESK:
 744                 switch (usage->hid) {
 745                 case HID_GD_X:
 746                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 747                                 code = ABS_MT_TOOL_X;
 748                                 MT_STORE_FIELD(cx);
 749                         } else {
 750                                 code = ABS_MT_POSITION_X;
 751                                 MT_STORE_FIELD(x);
 752                         }
 753
 754                         set_abs(hi->input, code, field, cls->sn_move);
 755
 756                         /*
 757                          * A system multi-axis that exports X and Y has a high
 758                          * chance of being used directly on a surface
 759                          */
 760                         if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
 761                                 __set_bit(INPUT_PROP_DIRECT,
 762                                           hi->input->propbit);
 763                                 input_set_abs_params(hi->input,
 764                                                      ABS_MT_TOOL_TYPE,
 765                                                      MT_TOOL_DIAL,
 766                                                      MT_TOOL_DIAL, 0, 0);
 767                         }
 768
 769                         return 1;
 770                 case HID_GD_Y:
 771                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 772                                 code = ABS_MT_TOOL_Y;
 773                                 MT_STORE_FIELD(cy);
 774                         } else {
 775                                 code = ABS_MT_POSITION_Y;
 776                                 MT_STORE_FIELD(y);
 777                         }
 778
 779                         set_abs(hi->input, code, field, cls->sn_move);
 780
 781                         return 1;
 782                 }
 783                 return 0;
 784
 785         case HID_UP_DIGITIZER:
 786                 switch (usage->hid) {
 787                 case HID_DG_INRANGE:
 788                         if (app->quirks & MT_QUIRK_HOVERING) {
 789                                 input_set_abs_params(hi->input,
 790                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 791                         }
 792                         MT_STORE_FIELD(inrange_state);
 793                         return 1;
 794                 case HID_DG_CONFIDENCE:
 795                         if ((cls->name == MT_CLS_WIN_8 ||
 796                              cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
 797                              cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
 798                              cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
 799                                 (field->application == HID_DG_TOUCHPAD ||
 800                                  field->application == HID_DG_TOUCHSCREEN))
 801                                 app->quirks |= MT_QUIRK_CONFIDENCE;
 802
 803                         if (app->quirks & MT_QUIRK_CONFIDENCE)
 804                                 input_set_abs_params(hi->input,
 805                                                      ABS_MT_TOOL_TYPE,
 806                                                      MT_TOOL_FINGER,
 807                                                      MT_TOOL_PALM, 0, 0);
 808
 809                         MT_STORE_FIELD(confidence_state);
 810                         return 1;
 811                 case HID_DG_TIPSWITCH:
 812                         if (field->application != HID_GD_SYSTEM_MULTIAXIS)
 813                                 input_set_capability(hi->input,
 814                                                      EV_KEY, BTN_TOUCH);
 815                         MT_STORE_FIELD(tip_state);
 816                         return 1;
 817                 case HID_DG_CONTACTID:
 818                         MT_STORE_FIELD(contactid);
 819                         app->touches_by_report++;
 820                         return 1;
 821                 case HID_DG_WIDTH:
 822                         if (!(app->quirks & MT_QUIRK_NO_AREA))
 823                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 824                                         cls->sn_width);
 825                         MT_STORE_FIELD(w);
 826                         return 1;
 827                 case HID_DG_HEIGHT:
 828                         if (!(app->quirks & MT_QUIRK_NO_AREA)) {
 829                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 830                                         cls->sn_height);
 831
 832                                 /*
 833                                  * Only set ABS_MT_ORIENTATION if it is not
 834                                  * already set by the HID_DG_AZIMUTH usage.
 835                                  */
 836                                 if (!test_bit(ABS_MT_ORIENTATION,
 837                                                 hi->input->absbit))
 838                                         input_set_abs_params(hi->input,
 839                                                 ABS_MT_ORIENTATION, 0, 1, 0, 0);
 840                         }
 841                         MT_STORE_FIELD(h);
 842                         return 1;
 843                 case HID_DG_TIPPRESSURE:
 844                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 845                                 cls->sn_pressure);
 846                         MT_STORE_FIELD(p);
 847                         return 1;
 848                 case HID_DG_SCANTIME:
 849                         input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
 850                         app->scantime = &field->value[usage->usage_index];
 851                         app->scantime_logical_max = field->logical_maximum;
 852                         return 1;
 853                 case HID_DG_CONTACTCOUNT:
 854                         app->have_contact_count = true;
 855                         app->raw_cc = &field->value[usage->usage_index];
 856                         return 1;
 857                 case HID_DG_AZIMUTH:
 858                         /*
 859                          * Azimuth has the range of [0, MAX) representing a full
 860                          * revolution. Set ABS_MT_ORIENTATION to a quarter of
 861                          * MAX according the definition of ABS_MT_ORIENTATION
 862                          */
 863                         input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
 864                                 -field->logical_maximum / 4,
 865                                 field->logical_maximum / 4,
 866                                 cls->sn_move ?
 867                                 field->logical_maximum / cls->sn_move : 0, 0);
 868                         MT_STORE_FIELD(a);
 869                         return 1;
 870                 case HID_DG_CONTACTMAX:
 871                         /* contact max are global to the report */
 872                         return -1;
 873                 case HID_DG_TOUCH:
 874                         /* Legacy devices use TIPSWITCH and not TOUCH.
 875                          * Let's just ignore this field. */
 876                         return -1;
 877                 }
 878                 /* let hid-input decide for the others */
 879                 return 0;
 880
 881         case HID_UP_BUTTON:
 882                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 883                 /*
 884                  * MS PTP spec says that external buttons left and right have
 885                  * usages 2 and 3.
 886                  */
 887                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
 888                     field->application == HID_DG_TOUCHPAD &&
 889                     (usage->hid & HID_USAGE) > 1)
 890                         code--;
 891
 892                 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
 893                         code = BTN_0  + ((usage->hid - 1) & HID_USAGE);
 894
 895                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 896                 if (!*bit)
 897                         return -1;
 898                 input_set_capability(hi->input, EV_KEY, code);
 899                 return 1;
 900
 901         case 0xff000000:
 902                 /* we do not want to map these: no input-oriented meaning */
 903                 return -1;
 904         }
 905
 906         return 0;
 907 }
 908
 909 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
 910                            struct mt_usages *slot,
 911                            struct input_dev *input)
 912 {
 913         __s32 quirks = app->quirks;
 914
 915         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 916                 return *slot->contactid;
 917
 918         if (quirks & MT_QUIRK_CYPRESS)
 919                 return cypress_compute_slot(app, slot);
 920
 921         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 922                 return app->num_received;
 923
 924         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 925                 return *slot->contactid - 1;
 926
 927         return input_mt_get_slot_by_key(input, *slot->contactid);
 928 }
 929
 930 static void mt_release_pending_palms(struct mt_device *td,
 931                                      struct mt_application *app,
 932                                      struct input_dev *input)
 933 {
 934         int slotnum;
 935         bool need_sync = false;
 936
 937         for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
 938                 clear_bit(slotnum, app->pending_palm_slots);
 939
 940                 input_mt_slot(input, slotnum);
 941                 input_mt_report_slot_inactive(input);
 942
 943                 need_sync = true;
 944         }
 945
 946         if (need_sync) {
 947                 input_mt_sync_frame(input);
 948                 input_sync(input);
 949         }
 950 }
 951
 952 /*
 953  * this function is called when a whole packet has been received and processed,
 954  * so that it can decide what to send to the input layer.
 955  */
 956 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
 957                           struct input_dev *input)
 958 {
 959         if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
 960                 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
 961
 962         input_mt_sync_frame(input);
 963         input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
 964         input_sync(input);
 965
 966         mt_release_pending_palms(td, app, input);
 967
 968         app->num_received = 0;
 969         app->left_button_state = 0;
 970
 971         if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
 972                 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 973         else
 974                 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 975         clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 976 }
 977
 978 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
 979 {
 980         long delta = value - app->prev_scantime;
 981         unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
 982
 983         app->jiffies = jiffies;
 984
 985         if (delta < 0)
 986                 delta += app->scantime_logical_max;
 987
 988         /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
 989         delta *= 100;
 990
 991         if (jdelta > MAX_TIMESTAMP_INTERVAL)
 992                 /* No data received for a while, resync the timestamp. */
 993                 return 0;
 994         else
 995                 return app->timestamp + delta;
 996 }
 997
 998 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 999                                 struct hid_usage *usage, __s32 value)
1000 {
1001         /* we will handle the hidinput part later, now remains hiddev */
1002         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1003                 hid->hiddev_hid_event(hid, field, usage, value);
1004
1005         return 1;
1006 }
1007
1008 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1009                             struct mt_application *app,
1010                             struct mt_usages *slot)
1011 {
1012         struct input_mt *mt = input->mt;
1013         struct hid_device *hdev = td->hdev;
1014         __s32 quirks = app->quirks;
1015         bool valid = true;
1016         bool confidence_state = true;
1017         bool inrange_state = false;
1018         int active;
1019         int slotnum;
1020         int tool = MT_TOOL_FINGER;
1021
1022         if (!slot)
1023                 return -EINVAL;
1024
1025         if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1026             app->num_received >= app->num_expected)
1027                 return -EAGAIN;
1028
1029         if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1030                 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1031                         valid = *slot->inrange_state;
1032                 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1033                         valid = *slot->tip_state;
1034                 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1035                         valid = *slot->confidence_state;
1036
1037                 if (!valid)
1038                         return 0;
1039         }
1040
1041         slotnum = mt_compute_slot(td, app, slot, input);
1042         if (slotnum < 0 || slotnum >= td->maxcontacts)
1043                 return 0;
1044
1045         if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1046                 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1047
1048                 if (input_mt_is_active(i_slot) &&
1049                     input_mt_is_used(mt, i_slot))
1050                         return -EAGAIN;
1051         }
1052
1053         if (quirks & MT_QUIRK_CONFIDENCE)
1054                 confidence_state = *slot->confidence_state;
1055
1056         if (quirks & MT_QUIRK_HOVERING)
1057                 inrange_state = *slot->inrange_state;
1058
1059         active = *slot->tip_state || inrange_state;
1060
1061         if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1062                 tool = MT_TOOL_DIAL;
1063         else if (unlikely(!confidence_state)) {
1064                 tool = MT_TOOL_PALM;
1065                 if (!active && mt &&
1066                     input_mt_is_active(&mt->slots[slotnum])) {
1067                         /*
1068                          * The non-confidence was reported for
1069                          * previously valid contact that is also no
1070                          * longer valid. We can't simply report
1071                          * lift-off as userspace will not be aware
1072                          * of non-confidence, so we need to split
1073                          * it into 2 events: active MT_TOOL_PALM
1074                          * and a separate liftoff.
1075                          */
1076                         active = true;
1077                         set_bit(slotnum, app->pending_palm_slots);
1078                 }
1079         }
1080
1081         input_mt_slot(input, slotnum);
1082         input_mt_report_slot_state(input, tool, active);
1083         if (active) {
1084                 /* this finger is in proximity of the sensor */
1085                 int wide = (*slot->w > *slot->h);
1086                 int major = max(*slot->w, *slot->h);
1087                 int minor = min(*slot->w, *slot->h);
1088                 int orientation = wide;
1089                 int max_azimuth;
1090                 int azimuth;
1091                 int x;
1092                 int y;
1093                 int cx;
1094                 int cy;
1095
1096                 if (slot->a != DEFAULT_ZERO) {
1097                         /*
1098                          * Azimuth is counter-clockwise and ranges from [0, MAX)
1099                          * (a full revolution). Convert it to clockwise ranging
1100                          * [-MAX/2, MAX/2].
1101                          *
1102                          * Note that ABS_MT_ORIENTATION require us to report
1103                          * the limit of [-MAX/4, MAX/4], but the value can go
1104                          * out of range to [-MAX/2, MAX/2] to report an upside
1105                          * down ellipsis.
1106                          */
1107                         azimuth = *slot->a;
1108                         max_azimuth = input_abs_get_max(input,
1109                                                         ABS_MT_ORIENTATION);
1110                         if (azimuth > max_azimuth * 2)
1111                                 azimuth -= max_azimuth * 4;
1112                         orientation = -azimuth;
1113                         if (quirks & MT_QUIRK_ORIENTATION_INVERT)
1114                                 orientation = -orientation;
1115
1116                 }
1117
1118                 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1119                         /*
1120                          * divided by two to match visual scale of touch
1121                          * for devices with this quirk
1122                          */
1123                         major = major >> 1;
1124                         minor = minor >> 1;
1125                 }
1126
1127                 x = hdev->quirks & HID_QUIRK_X_INVERT ?
1128                         input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x :
1129                         *slot->x;
1130                 y = hdev->quirks & HID_QUIRK_Y_INVERT ?
1131                         input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y :
1132                         *slot->y;
1133                 cx = hdev->quirks & HID_QUIRK_X_INVERT ?
1134                         input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx :
1135                         *slot->cx;
1136                 cy = hdev->quirks & HID_QUIRK_Y_INVERT ?
1137                         input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy :
1138                         *slot->cy;
1139
1140                 input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
1141                 input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
1142                 input_event(input, EV_ABS, ABS_MT_TOOL_X, cx);
1143                 input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy);
1144                 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1145                 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1146                 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1147                 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1148                 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1149
1150                 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1151         }
1152
1153         return 0;
1154 }
1155
1156 static void mt_process_mt_event(struct hid_device *hid,
1157                                 struct mt_application *app,
1158                                 struct hid_field *field,
1159                                 struct hid_usage *usage,
1160                                 __s32 value,
1161                                 bool first_packet)
1162 {
1163         __s32 quirks = app->quirks;
1164         struct input_dev *input = field->hidinput->input;
1165
1166         if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1167                 return;
1168
1169         if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1170
1171                 /*
1172                  * For Win8 PTP touchpads we should only look at
1173                  * non finger/touch events in the first_packet of a
1174                  * (possible) multi-packet frame.
1175                  */
1176                 if (!first_packet)
1177                         return;
1178
1179                 /*
1180                  * For Win8 PTP touchpads we map both the clickpad click
1181                  * and any "external" left buttons to BTN_LEFT if a
1182                  * device claims to have both we need to report 1 for
1183                  * BTN_LEFT if either is pressed, so we or all values
1184                  * together and report the result in mt_sync_frame().
1185                  */
1186                 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1187                         app->left_button_state |= value;
1188                         return;
1189                 }
1190         }
1191
1192         input_event(input, usage->type, usage->code, value);
1193 }
1194
1195 static void mt_touch_report(struct hid_device *hid,
1196                             struct mt_report_data *rdata)
1197 {
1198         struct mt_device *td = hid_get_drvdata(hid);
1199         struct hid_report *report = rdata->report;
1200         struct mt_application *app = rdata->application;
1201         struct hid_field *field;
1202         struct input_dev *input;
1203         struct mt_usages *slot;
1204         bool first_packet;
1205         unsigned count;
1206         int r, n;
1207         int scantime = 0;
1208         int contact_count = -1;
1209
1210         /* sticky fingers release in progress, abort */
1211         if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1212                 return;
1213
1214         scantime = *app->scantime;
1215         app->timestamp = mt_compute_timestamp(app, scantime);
1216         if (app->raw_cc != DEFAULT_ZERO)
1217                 contact_count = *app->raw_cc;
1218
1219         /*
1220          * Includes multi-packet support where subsequent
1221          * packets are sent with zero contactcount.
1222          */
1223         if (contact_count >= 0) {
1224                 /*
1225                  * For Win8 PTPs the first packet (td->num_received == 0) may
1226                  * have a contactcount of 0 if there only is a button event.
1227                  * We double check that this is not a continuation packet
1228                  * of a possible multi-packet frame be checking that the
1229                  * timestamp has changed.
1230                  */
1231                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1232                     app->num_received == 0 &&
1233                     app->prev_scantime != scantime)
1234                         app->num_expected = contact_count;
1235                 /* A non 0 contact count always indicates a first packet */
1236                 else if (contact_count)
1237                         app->num_expected = contact_count;
1238         }
1239         app->prev_scantime = scantime;
1240
1241         first_packet = app->num_received == 0;
1242
1243         input = report->field[0]->hidinput->input;
1244
1245         list_for_each_entry(slot, &app->mt_usages, list) {
1246                 if (!mt_process_slot(td, input, app, slot))
1247                         app->num_received++;
1248         }
1249
1250         for (r = 0; r < report->maxfield; r++) {
1251                 field = report->field[r];
1252                 count = field->report_count;
1253
1254                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1255                         continue;
1256
1257                 for (n = 0; n < count; n++)
1258                         mt_process_mt_event(hid, app, field,
1259                                             &field->usage[n], field->value[n],
1260                                             first_packet);
1261         }
1262
1263         if (app->num_received >= app->num_expected)
1264                 mt_sync_frame(td, app, input);
1265
1266         /*
1267          * Windows 8 specs says 2 things:
1268          * - once a contact has been reported, it has to be reported in each
1269          *   subsequent report
1270          * - the report rate when fingers are present has to be at least
1271          *   the refresh rate of the screen, 60 or 120 Hz
1272          *
1273          * I interprete this that the specification forces a report rate of
1274          * at least 60 Hz for a touchscreen to be certified.
1275          * Which means that if we do not get a report whithin 16 ms, either
1276          * something wrong happens, either the touchscreen forgets to send
1277          * a release. Taking a reasonable margin allows to remove issues
1278          * with USB communication or the load of the machine.
1279          *
1280          * Given that Win 8 devices are forced to send a release, this will
1281          * only affect laggish machines and the ones that have a firmware
1282          * defect.
1283          */
1284         if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1285                 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1286                         mod_timer(&td->release_timer,
1287                                   jiffies + msecs_to_jiffies(100));
1288                 else
1289                         del_timer(&td->release_timer);
1290         }
1291
1292         clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1293 }
1294
1295 static int mt_touch_input_configured(struct hid_device *hdev,
1296                                      struct hid_input *hi,
1297                                      struct mt_application *app)
1298 {
1299         struct mt_device *td = hid_get_drvdata(hdev);
1300         struct mt_class *cls = &td->mtclass;
1301         struct input_dev *input = hi->input;
1302         int ret;
1303
1304         if (!td->maxcontacts)
1305                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1306
1307         mt_post_parse(td, app);
1308         if (td->serial_maybe)
1309                 mt_post_parse_default_settings(td, app);
1310
1311         if (cls->is_indirect)
1312                 app->mt_flags |= INPUT_MT_POINTER;
1313
1314         if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1315                 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1316
1317         /* check for clickpads */
1318         if ((app->mt_flags & INPUT_MT_POINTER) &&
1319             (app->buttons_count == 1))
1320                 td->is_buttonpad = true;
1321
1322         if (td->is_buttonpad)
1323                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1324
1325         app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1326                                                BITS_TO_LONGS(td->maxcontacts),
1327                                                sizeof(long),
1328                                                GFP_KERNEL);
1329         if (!app->pending_palm_slots)
1330                 return -ENOMEM;
1331
1332         ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1333         if (ret)
1334                 return ret;
1335
1336         app->mt_flags = 0;
1337         return 0;
1338 }
1339
1340 #define mt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, \
1341                                                     max, EV_KEY, (c))
1342 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1343                 struct hid_field *field, struct hid_usage *usage,
1344                 unsigned long **bit, int *max)
1345 {
1346         struct mt_device *td = hid_get_drvdata(hdev);
1347         struct mt_application *application;
1348         struct mt_report_data *rdata;
1349
1350         rdata = mt_find_report_data(td, field->report);
1351         if (!rdata) {
1352                 hid_err(hdev, "failed to allocate data for report\n");
1353                 return 0;
1354         }
1355
1356         application = rdata->application;
1357
1358         /*
1359          * If mtclass.export_all_inputs is not set, only map fields from
1360          * TouchScreen or TouchPad collections. We need to ignore fields
1361          * that belong to other collections such as Mouse that might have
1362          * the same GenericDesktop usages.
1363          */
1364         if (!td->mtclass.export_all_inputs &&
1365             field->application != HID_DG_TOUCHSCREEN &&
1366             field->application != HID_DG_PEN &&
1367             field->application != HID_DG_TOUCHPAD &&
1368             field->application != HID_GD_KEYBOARD &&
1369             field->application != HID_GD_SYSTEM_CONTROL &&
1370             field->application != HID_CP_CONSUMER_CONTROL &&
1371             field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1372             field->application != HID_GD_SYSTEM_MULTIAXIS &&
1373             !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1374               application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1375                 return -1;
1376
1377         /*
1378          * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1379          * touchpad report descriptor. We need to treat these as an array to
1380          * map usages to input keys.
1381          */
1382         if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1383             application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1384             (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1385                 set_bit(EV_REP, hi->input->evbit);
1386                 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1387                         field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1388                 switch (usage->hid & HID_USAGE) {
1389                 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);        break;
1390                 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);          break;
1391                 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);           break;
1392                 case 0x6b: mt_map_key_clear(KEY_F21);                   break;
1393                 case 0x6c: mt_map_key_clear(KEY_SLEEP);                 break;
1394                 default:
1395                         return -1;
1396                 }
1397                 return 1;
1398         }
1399
1400         if (rdata->is_mt_collection)
1401                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1402                                               application);
1403
1404         /*
1405          * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1406          * for the stylus. Overwrite the hid_input application
1407          */
1408         if (field->physical == HID_DG_STYLUS)
1409                 hi->application = HID_DG_STYLUS;
1410
1411         /* let hid-core decide for the others */
1412         return 0;
1413 }
1414
1415 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1416                 struct hid_field *field, struct hid_usage *usage,
1417                 unsigned long **bit, int *max)
1418 {
1419         struct mt_device *td = hid_get_drvdata(hdev);
1420         struct mt_report_data *rdata;
1421
1422         rdata = mt_find_report_data(td, field->report);
1423         if (rdata && rdata->is_mt_collection) {
1424                 /* We own these mappings, tell hid-input to ignore them */
1425                 return -1;
1426         }
1427
1428         /* let hid-core decide for the others */
1429         return 0;
1430 }
1431
1432 static int mt_event(struct hid_device *hid, struct hid_field *field,
1433                                 struct hid_usage *usage, __s32 value)
1434 {
1435         struct mt_device *td = hid_get_drvdata(hid);
1436         struct mt_report_data *rdata;
1437
1438         rdata = mt_find_report_data(td, field->report);
1439         if (rdata && rdata->is_mt_collection)
1440                 return mt_touch_event(hid, field, usage, value);
1441
1442         return 0;
1443 }
1444
1445 static void mt_report(struct hid_device *hid, struct hid_report *report)
1446 {
1447         struct mt_device *td = hid_get_drvdata(hid);
1448         struct hid_field *field = report->field[0];
1449         struct mt_report_data *rdata;
1450
1451         if (!(hid->claimed & HID_CLAIMED_INPUT))
1452                 return;
1453
1454         rdata = mt_find_report_data(td, report);
1455         if (rdata && rdata->is_mt_collection)
1456                 return mt_touch_report(hid, rdata);
1457
1458         if (field && field->hidinput && field->hidinput->input)
1459                 input_sync(field->hidinput->input);
1460 }
1461
1462 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1463                                      struct hid_field *field,
1464                                      struct hid_usage *usage,
1465                                      enum latency_mode latency,
1466                                      bool surface_switch,
1467                                      bool button_switch,
1468                                      bool *inputmode_found)
1469 {
1470         struct mt_device *td = hid_get_drvdata(hdev);
1471         struct mt_class *cls = &td->mtclass;
1472         struct hid_report *report = field->report;
1473         unsigned int index = usage->usage_index;
1474         char *buf;
1475         u32 report_len;
1476         int max;
1477
1478         switch (usage->hid) {
1479         case HID_DG_INPUTMODE:
1480                 /*
1481                  * Some elan panels wrongly declare 2 input mode features,
1482                  * and silently ignore when we set the value in the second
1483                  * field. Skip the second feature and hope for the best.
1484                  */
1485                 if (*inputmode_found)
1486                         return false;
1487
1488                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1489                         report_len = hid_report_len(report);
1490                         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1491                         if (!buf) {
1492                                 hid_err(hdev,
1493                                         "failed to allocate buffer for report\n");
1494                                 return false;
1495                         }
1496                         hid_hw_raw_request(hdev, report->id, buf, report_len,
1497                                            HID_FEATURE_REPORT,
1498                                            HID_REQ_GET_REPORT);
1499                         kfree(buf);
1500                 }
1501
1502                 field->value[index] = td->inputmode_value;
1503                 *inputmode_found = true;
1504                 return true;
1505
1506         case HID_DG_CONTACTMAX:
1507                 if (cls->maxcontacts) {
1508                         max = min_t(int, field->logical_maximum,
1509                                     cls->maxcontacts);
1510                         if (field->value[index] != max) {
1511                                 field->value[index] = max;
1512                                 return true;
1513                         }
1514                 }
1515                 break;
1516
1517         case HID_DG_LATENCYMODE:
1518                 field->value[index] = latency;
1519                 return true;
1520
1521         case HID_DG_SURFACESWITCH:
1522                 field->value[index] = surface_switch;
1523                 return true;
1524
1525         case HID_DG_BUTTONSWITCH:
1526                 field->value[index] = button_switch;
1527                 return true;
1528         }
1529
1530         return false; /* no need to update the report */
1531 }
1532
1533 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1534                          bool surface_switch, bool button_switch)
1535 {
1536         struct hid_report_enum *rep_enum;
1537         struct hid_report *rep;
1538         struct hid_usage *usage;
1539         int i, j;
1540         bool update_report;
1541         bool inputmode_found = false;
1542
1543         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1544         list_for_each_entry(rep, &rep_enum->report_list, list) {
1545                 update_report = false;
1546
1547                 for (i = 0; i < rep->maxfield; i++) {
1548                         /* Ignore if report count is out of bounds. */
1549                         if (rep->field[i]->report_count < 1)
1550                                 continue;
1551
1552                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1553                                 usage = &rep->field[i]->usage[j];
1554
1555                                 if (mt_need_to_apply_feature(hdev,
1556                                                              rep->field[i],
1557                                                              usage,
1558                                                              latency,
1559                                                              surface_switch,
1560                                                              button_switch,
1561                                                              &inputmode_found))
1562                                         update_report = true;
1563                         }
1564                 }
1565
1566                 if (update_report)
1567                         hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1568         }
1569 }
1570
1571 static void mt_post_parse_default_settings(struct mt_device *td,
1572                                            struct mt_application *app)
1573 {
1574         __s32 quirks = app->quirks;
1575
1576         /* unknown serial device needs special quirks */
1577         if (list_is_singular(&app->mt_usages)) {
1578                 quirks |= MT_QUIRK_ALWAYS_VALID;
1579                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1580                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1581                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1582                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1583         }
1584
1585         app->quirks = quirks;
1586 }
1587
1588 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1589 {
1590         if (!app->have_contact_count)
1591                 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1592 }
1593
1594 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1595 {
1596         struct mt_device *td = hid_get_drvdata(hdev);
1597         const char *suffix = NULL;
1598         struct mt_report_data *rdata;
1599         struct mt_application *mt_application = NULL;
1600         struct hid_report *report;
1601         int ret;
1602
1603         list_for_each_entry(report, &hi->reports, hidinput_list) {
1604                 rdata = mt_find_report_data(td, report);
1605                 if (!rdata) {
1606                         hid_err(hdev, "failed to allocate data for report\n");
1607                         return -ENOMEM;
1608                 }
1609
1610                 mt_application = rdata->application;
1611
1612                 if (rdata->is_mt_collection) {
1613                         ret = mt_touch_input_configured(hdev, hi,
1614                                                         mt_application);
1615                         if (ret)
1616                                 return ret;
1617                 }
1618         }
1619
1620         switch (hi->application) {
1621         case HID_GD_KEYBOARD:
1622         case HID_GD_KEYPAD:
1623         case HID_GD_MOUSE:
1624         case HID_DG_TOUCHPAD:
1625         case HID_GD_SYSTEM_CONTROL:
1626         case HID_CP_CONSUMER_CONTROL:
1627         case HID_GD_WIRELESS_RADIO_CTLS:
1628         case HID_GD_SYSTEM_MULTIAXIS:
1629                 /* already handled by hid core */
1630                 break;
1631         case HID_DG_TOUCHSCREEN:
1632                 /* we do not set suffix = "Touchscreen" */
1633                 hi->input->name = hdev->name;
1634                 break;
1635         case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1636                 suffix = "Custom Media Keys";
1637                 break;
1638         case HID_DG_STYLUS:
1639                 /* force BTN_STYLUS to allow tablet matching in udev */
1640                 __set_bit(BTN_STYLUS, hi->input->keybit);
1641                 break;
1642         default:
1643                 suffix = "UNKNOWN";
1644                 break;
1645         }
1646
1647         if (suffix)
1648                 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1649                                                  "%s %s", hdev->name, suffix);
1650
1651         return 0;
1652 }
1653
1654 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1655 {
1656         if (field->usage[0].hid != usage ||
1657             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1658                 return;
1659
1660         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1661         field->flags |= HID_MAIN_ITEM_VARIABLE;
1662 }
1663
1664 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1665 {
1666         struct hid_report *report;
1667         int i;
1668
1669         list_for_each_entry(report,
1670                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1671                             list) {
1672
1673                 if (!report->maxfield)
1674                         continue;
1675
1676                 for (i = 0; i < report->maxfield; i++)
1677                         if (report->field[i]->maxusage >= 1)
1678                                 mt_fix_const_field(report->field[i], usage);
1679         }
1680 }
1681
1682 static void mt_release_contacts(struct hid_device *hid)
1683 {
1684         struct hid_input *hidinput;
1685         struct mt_application *application;
1686         struct mt_device *td = hid_get_drvdata(hid);
1687
1688         list_for_each_entry(hidinput, &hid->inputs, list) {
1689                 struct input_dev *input_dev = hidinput->input;
1690                 struct input_mt *mt = input_dev->mt;
1691                 int i;
1692
1693                 if (mt) {
1694                         for (i = 0; i < mt->num_slots; i++) {
1695                                 input_mt_slot(input_dev, i);
1696                                 input_mt_report_slot_inactive(input_dev);
1697                         }
1698                         input_mt_sync_frame(input_dev);
1699                         input_sync(input_dev);
1700                 }
1701         }
1702
1703         list_for_each_entry(application, &td->applications, list) {
1704                 application->num_received = 0;
1705         }
1706 }
1707
1708 static void mt_expired_timeout(struct timer_list *t)
1709 {
1710         struct mt_device *td = from_timer(td, t, release_timer);
1711         struct hid_device *hdev = td->hdev;
1712
1713         /*
1714          * An input report came in just before we release the sticky fingers,
1715          * it will take care of the sticky fingers.
1716          */
1717         if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1718                 return;
1719         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1720                 mt_release_contacts(hdev);
1721         clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1722 }
1723
1724 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1725 {
1726         int ret, i;
1727         struct mt_device *td;
1728         const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1729
1730         for (i = 0; mt_classes[i].name ; i++) {
1731                 if (id->driver_data == mt_classes[i].name) {
1732                         mtclass = &(mt_classes[i]);
1733                         break;
1734                 }
1735         }
1736
1737         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1738         if (!td) {
1739                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1740                 return -ENOMEM;
1741         }
1742         td->hdev = hdev;
1743         td->mtclass = *mtclass;
1744         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1745         hid_set_drvdata(hdev, td);
1746
1747         INIT_LIST_HEAD(&td->applications);
1748         INIT_LIST_HEAD(&td->reports);
1749
1750         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1751                 td->serial_maybe = true;
1752
1753
1754         /* Orientation is inverted if the X or Y axes are
1755          * flipped, but normalized if both are inverted.
1756          */
1757         if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) &&
1758             !((hdev->quirks & HID_QUIRK_X_INVERT)
1759               && (hdev->quirks & HID_QUIRK_Y_INVERT)))
1760                 td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT;
1761
1762         /* This allows the driver to correctly support devices
1763          * that emit events over several HID messages.
1764          */
1765         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1766
1767         /*
1768          * This allows the driver to handle different input sensors
1769          * that emits events through different applications on the same HID
1770          * device.
1771          */
1772         hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1773
1774         if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1775                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1776
1777         if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1778                 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1779                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1780         }
1781
1782         timer_setup(&td->release_timer, mt_expired_timeout, 0);
1783
1784         ret = hid_parse(hdev);
1785         if (ret != 0)
1786                 return ret;
1787
1788         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1789                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1790
1791         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1792         if (ret)
1793                 return ret;
1794
1795         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1796         if (ret)
1797                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1798                                 hdev->name);
1799
1800         mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1801
1802         return 0;
1803 }
1804
1805 #ifdef CONFIG_PM
1806 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1807 {
1808         struct mt_device *td = hid_get_drvdata(hdev);
1809
1810         /* High latency is desirable for power savings during S3/S0ix */
1811         if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1812             !hid_hw_may_wakeup(hdev))
1813                 mt_set_modes(hdev, HID_LATENCY_HIGH, false, false);
1814         else
1815                 mt_set_modes(hdev, HID_LATENCY_HIGH, true, true);
1816
1817         return 0;
1818 }
1819
1820 static int mt_reset_resume(struct hid_device *hdev)
1821 {
1822         mt_release_contacts(hdev);
1823         mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1824         return 0;
1825 }
1826
1827 static int mt_resume(struct hid_device *hdev)
1828 {
1829         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1830          * It should be safe to send it to other devices too.
1831          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1832
1833         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1834
1835         mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true);
1836
1837         return 0;
1838 }
1839 #endif
1840
1841 static void mt_remove(struct hid_device *hdev)
1842 {
1843         struct mt_device *td = hid_get_drvdata(hdev);
1844
1845         del_timer_sync(&td->release_timer);
1846
1847         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1848         hid_hw_stop(hdev);
1849 }
1850
1851 /*
1852  * This list contains only:
1853  * - VID/PID of products not working with the default multitouch handling
1854  * - 2 generic rules.
1855  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1856  */
1857 static const struct hid_device_id mt_devices[] = {
1858
1859         /* 3M panels */
1860         { .driver_data = MT_CLS_3M,
1861                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1862                         USB_DEVICE_ID_3M1968) },
1863         { .driver_data = MT_CLS_3M,
1864                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1865                         USB_DEVICE_ID_3M2256) },
1866         { .driver_data = MT_CLS_3M,
1867                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1868                         USB_DEVICE_ID_3M3266) },
1869
1870         /* Anton devices */
1871         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1872                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1873                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1874
1875         /* Asus T101HA */
1876         { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
1877                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1878                            USB_VENDOR_ID_ASUSTEK,
1879                            USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1880
1881         /* Asus T304UA */
1882         { .driver_data = MT_CLS_ASUS,
1883                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1884                         USB_VENDOR_ID_ASUSTEK,
1885                         USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1886
1887         /* Atmel panels */
1888         { .driver_data = MT_CLS_SERIAL,
1889                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1890                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1891
1892         /* Baanto multitouch devices */
1893         { .driver_data = MT_CLS_NSMU,
1894                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1895                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1896
1897         /* Cando panels */
1898         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1899                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1900                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1901         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1902                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1903                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1904
1905         /* Chunghwa Telecom touch panels */
1906         {  .driver_data = MT_CLS_NSMU,
1907                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1908                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1909
1910         /* CJTouch panels */
1911         { .driver_data = MT_CLS_NSMU,
1912                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1913                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1914         { .driver_data = MT_CLS_NSMU,
1915                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1916                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1917
1918         /* CVTouch panels */
1919         { .driver_data = MT_CLS_NSMU,
1920                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1921                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1922
1923         /* eGalax devices (SAW) */
1924         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1925                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1926                         USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
1927
1928         /* eGalax devices (resistive) */
1929         { .driver_data = MT_CLS_EGALAX,
1930                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1931                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1932         { .driver_data = MT_CLS_EGALAX,
1933                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1934                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1935
1936         /* eGalax devices (capacitive) */
1937         { .driver_data = MT_CLS_EGALAX_SERIAL,
1938                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1939                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1940         { .driver_data = MT_CLS_EGALAX,
1941                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1942                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1943         { .driver_data = MT_CLS_EGALAX_SERIAL,
1944                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1945                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1946         { .driver_data = MT_CLS_EGALAX_SERIAL,
1947                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1948                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1949         { .driver_data = MT_CLS_EGALAX_SERIAL,
1950                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1951                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1952         { .driver_data = MT_CLS_EGALAX_SERIAL,
1953                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1954                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1955         { .driver_data = MT_CLS_EGALAX,
1956                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1957                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1958         { .driver_data = MT_CLS_EGALAX,
1959                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1960                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1961         { .driver_data = MT_CLS_EGALAX_SERIAL,
1962                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1963                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1964         { .driver_data = MT_CLS_EGALAX,
1965                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1966                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1967         { .driver_data = MT_CLS_EGALAX,
1968                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1969                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1970         { .driver_data = MT_CLS_EGALAX,
1971                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1972                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1973         { .driver_data = MT_CLS_EGALAX,
1974                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1975                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1976         { .driver_data = MT_CLS_EGALAX_SERIAL,
1977                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1978                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1979         { .driver_data = MT_CLS_EGALAX_SERIAL,
1980                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1981                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1982         { .driver_data = MT_CLS_EGALAX_SERIAL,
1983                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1984                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1985         { .driver_data = MT_CLS_EGALAX,
1986                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1987                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
1988
1989         /* Elan devices */
1990         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1991                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1992                         USB_VENDOR_ID_ELAN, 0x313a) },
1993
1994         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
1995                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1996                         USB_VENDOR_ID_ELAN, 0x3148) },
1997
1998         /* Elitegroup panel */
1999         { .driver_data = MT_CLS_SERIAL,
2000                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
2001                         USB_DEVICE_ID_ELITEGROUP_05D8) },
2002
2003         /* Flatfrog Panels */
2004         { .driver_data = MT_CLS_FLATFROG,
2005                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
2006                         USB_DEVICE_ID_MULTITOUCH_3200) },
2007
2008         /* FocalTech Panels */
2009         { .driver_data = MT_CLS_SERIAL,
2010                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
2011                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
2012
2013         /* GeneralTouch panel */
2014         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2015                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2016                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
2017         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2018                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2019                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
2020         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2021                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2022                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
2023         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2024                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2025                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2026         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2027                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2028                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2029         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2030                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2031                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2032         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2033                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2034                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2035
2036         /* Gametel game controller */
2037         { .driver_data = MT_CLS_NSMU,
2038                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2039                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
2040
2041         /* GoodTouch panels */
2042         { .driver_data = MT_CLS_NSMU,
2043                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2044                         USB_DEVICE_ID_GOODTOUCH_000f) },
2045
2046         /* Hanvon panels */
2047         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2048                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2049                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2050
2051         /* Ilitek dual touch panel */
2052         {  .driver_data = MT_CLS_NSMU,
2053                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2054                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2055
2056         /* LG Melfas panel */
2057         { .driver_data = MT_CLS_LG,
2058                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2059                         USB_DEVICE_ID_LG_MELFAS_MT) },
2060         { .driver_data = MT_CLS_LG,
2061                 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2062                         USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2063
2064         /* Lenovo X1 TAB Gen 2 */
2065         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2066                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2067                            USB_VENDOR_ID_LENOVO,
2068                            USB_DEVICE_ID_LENOVO_X1_TAB) },
2069
2070         /* Lenovo X1 TAB Gen 3 */
2071         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2072                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2073                            USB_VENDOR_ID_LENOVO,
2074                            USB_DEVICE_ID_LENOVO_X1_TAB3) },
2075
2076         /* Lenovo X12 TAB Gen 1 */
2077         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2078                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2079                            USB_VENDOR_ID_LENOVO,
2080                            USB_DEVICE_ID_LENOVO_X12_TAB) },
2081
2082         /* MosArt panels */
2083         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2084                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2085                         USB_DEVICE_ID_ASUS_T91MT)},
2086         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2087                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2088                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2089         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2090                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2091                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2092
2093         /* Novatek Panel */
2094         { .driver_data = MT_CLS_NSMU,
2095                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2096                         USB_DEVICE_ID_NOVATEK_PCT) },
2097
2098         /* Ntrig Panel */
2099         { .driver_data = MT_CLS_NSMU,
2100                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2101                         USB_VENDOR_ID_NTRIG, 0x1b05) },
2102
2103         /* Panasonic panels */
2104         { .driver_data = MT_CLS_PANASONIC,
2105                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2106                         USB_DEVICE_ID_PANABOARD_UBT780) },
2107         { .driver_data = MT_CLS_PANASONIC,
2108                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2109                         USB_DEVICE_ID_PANABOARD_UBT880) },
2110
2111         /* PixArt optical touch screen */
2112         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2113                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2114                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2115         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2116                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2117                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2118         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2119                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2120                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2121
2122         /* PixCir-based panels */
2123         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2124                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2125                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2126
2127         /* Quanta-based panels */
2128         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2129                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2130                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2131
2132         /* Razer touchpads */
2133         { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2134                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2135                         USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2136
2137         /* Smart Tech panels */
2138         { .driver_data = MT_CLS_SMART_TECH,
2139                 MT_USB_DEVICE(0x0b8c, 0x0092)},
2140
2141         /* Stantum panels */
2142         { .driver_data = MT_CLS_CONFIDENCE,
2143                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2144                         USB_DEVICE_ID_MTP_STM)},
2145
2146         /* Synaptics devices */
2147         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2148                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2149                         USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
2150
2151         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2152                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2153                         USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2154
2155         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2156                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2157                         USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2158
2159         /* TopSeed panels */
2160         { .driver_data = MT_CLS_TOPSEED,
2161                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2162                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2163
2164         /* Touch International panels */
2165         { .driver_data = MT_CLS_NSMU,
2166                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2167                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2168
2169         /* Unitec panels */
2170         { .driver_data = MT_CLS_NSMU,
2171                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2172                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2173         { .driver_data = MT_CLS_NSMU,
2174                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2175                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2176
2177         /* VTL panels */
2178         { .driver_data = MT_CLS_VTL,
2179                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2180                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2181
2182         /* Winbond Electronics Corp. */
2183         { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2184                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2185                            USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2186
2187         /* Wistron panels */
2188         { .driver_data = MT_CLS_NSMU,
2189                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2190                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2191
2192         /* XAT */
2193         { .driver_data = MT_CLS_NSMU,
2194                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2195                         USB_DEVICE_ID_XAT_CSR) },
2196
2197         /* Xiroku */
2198         { .driver_data = MT_CLS_NSMU,
2199                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2200                         USB_DEVICE_ID_XIROKU_SPX) },
2201         { .driver_data = MT_CLS_NSMU,
2202                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2203                         USB_DEVICE_ID_XIROKU_MPX) },
2204         { .driver_data = MT_CLS_NSMU,
2205                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2206                         USB_DEVICE_ID_XIROKU_CSR) },
2207         { .driver_data = MT_CLS_NSMU,
2208                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2209                         USB_DEVICE_ID_XIROKU_SPX1) },
2210         { .driver_data = MT_CLS_NSMU,
2211                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2212                         USB_DEVICE_ID_XIROKU_MPX1) },
2213         { .driver_data = MT_CLS_NSMU,
2214                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2215                         USB_DEVICE_ID_XIROKU_CSR1) },
2216         { .driver_data = MT_CLS_NSMU,
2217                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2218                         USB_DEVICE_ID_XIROKU_SPX2) },
2219         { .driver_data = MT_CLS_NSMU,
2220                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2221                         USB_DEVICE_ID_XIROKU_MPX2) },
2222         { .driver_data = MT_CLS_NSMU,
2223                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2224                         USB_DEVICE_ID_XIROKU_CSR2) },
2225
2226         /* Google MT devices */
2227         { .driver_data = MT_CLS_GOOGLE,
2228                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2229                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2230         { .driver_data = MT_CLS_GOOGLE,
2231                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2232                         USB_DEVICE_ID_GOOGLE_WHISKERS) },
2233
2234         /* Generic MT device */
2235         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2236
2237         /* Generic Win 8 certified MT device */
2238         {  .driver_data = MT_CLS_WIN_8,
2239                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2240                         HID_ANY_ID, HID_ANY_ID) },
2241         { }
2242 };
2243 MODULE_DEVICE_TABLE(hid, mt_devices);
2244
2245 static const struct hid_usage_id mt_grabbed_usages[] = {
2246         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2247         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2248 };
2249
2250 static struct hid_driver mt_driver = {
2251         .name = "hid-multitouch",
2252         .id_table = mt_devices,
2253         .probe = mt_probe,
2254         .remove = mt_remove,
2255         .input_mapping = mt_input_mapping,
2256         .input_mapped = mt_input_mapped,
2257         .input_configured = mt_input_configured,
2258         .feature_mapping = mt_feature_mapping,
2259         .usage_table = mt_grabbed_usages,
2260         .event = mt_event,
2261         .report = mt_report,
2262 #ifdef CONFIG_PM
2263         .suspend = mt_suspend,
2264         .reset_resume = mt_reset_resume,
2265         .resume = mt_resume,
2266 #endif
2267 };
2268 module_hid_driver(mt_driver);