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