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 <[email protected]>
   6  *  Copyright (c) 2010-2013 Benjamin Tissoires <[email protected]>
   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 <[email protected]>
  13  *  Copyright (c) 2010 Henrik Rydberg <[email protected]>
  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 <[email protected]>
  19  *  Copyright (c) 2010      Henrik Rydberg <[email protected]>
  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/bits.h>
  35 #include <linux/device.h>
  36 #include <linux/hid.h>
  37 #include <linux/module.h>
  38 #include <linux/slab.h>
  39 #include <linux/input/mt.h>
  40 #include <linux/jiffies.h>
  41 #include <linux/string.h>
  42 #include <linux/timer.h>
  43
  44
  45 MODULE_AUTHOR("Stephane Chatty <[email protected]>");
  46 MODULE_AUTHOR("Benjamin Tissoires <[email protected]>");
  47 MODULE_DESCRIPTION("HID multitouch panels");
  48 MODULE_LICENSE("GPL");
  49
  50 #include "hid-ids.h"
  51
  52 /* quirks to control the device */
  53 #define MT_QUIRK_NOT_SEEN_MEANS_UP      BIT(0)
  54 #define MT_QUIRK_SLOT_IS_CONTACTID      BIT(1)
  55 #define MT_QUIRK_CYPRESS                BIT(2)
  56 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
  57 #define MT_QUIRK_ALWAYS_VALID           BIT(4)
  58 #define MT_QUIRK_VALID_IS_INRANGE       BIT(5)
  59 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
  60 #define MT_QUIRK_CONFIDENCE             BIT(7)
  61 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
  62 #define MT_QUIRK_NO_AREA                BIT(9)
  63 #define MT_QUIRK_IGNORE_DUPLICATES      BIT(10)
  64 #define MT_QUIRK_HOVERING               BIT(11)
  65 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
  66 #define MT_QUIRK_FORCE_GET_FEATURE      BIT(13)
  67 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
  68 #define MT_QUIRK_TOUCH_SIZE_SCALING     BIT(15)
  69 #define MT_QUIRK_STICKY_FINGERS         BIT(16)
  70 #define MT_QUIRK_ASUS_CUSTOM_UP         BIT(17)
  71 #define MT_QUIRK_WIN8_PTP_BUTTONS       BIT(18)
  72 #define MT_QUIRK_SEPARATE_APP_REPORT    BIT(19)
  73 #define MT_QUIRK_FORCE_MULTI_INPUT      BIT(20)
  74 #define MT_QUIRK_DISABLE_WAKEUP         BIT(21)
  75 #define MT_QUIRK_ORIENTATION_INVERT     BIT(22)
  76
  77 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  78 #define MT_INPUTMODE_TOUCHPAD           0x03
  79
  80 #define MT_BUTTONTYPE_CLICKPAD          0
  81
  82 enum latency_mode {
  83         HID_LATENCY_NORMAL = 0,
  84         HID_LATENCY_HIGH = 1,
  85 };
  86
  87 enum report_mode {
  88         TOUCHPAD_REPORT_NONE = 0,
  89         TOUCHPAD_REPORT_BUTTONS = BIT(0),
  90         TOUCHPAD_REPORT_CONTACTS = BIT(1),
  91         TOUCHPAD_REPORT_ALL = TOUCHPAD_REPORT_BUTTONS | TOUCHPAD_REPORT_CONTACTS,
  92 };
  93
  94 #define MT_IO_FLAGS_RUNNING             0
  95 #define MT_IO_FLAGS_ACTIVE_SLOTS        1
  96 #define MT_IO_FLAGS_PENDING_SLOTS       2
  97
  98 static const bool mtrue = true;         /* default for true */
  99 static const bool mfalse;               /* default for false */
 100 static const __s32 mzero;               /* default for 0 */
 101
 102 #define DEFAULT_TRUE    ((void *)&mtrue)
 103 #define DEFAULT_FALSE   ((void *)&mfalse)
 104 #define DEFAULT_ZERO    ((void *)&mzero)
 105
 106 struct mt_usages {
 107         struct list_head list;
 108         __s32 *x, *y, *cx, *cy, *p, *w, *h, *a;
 109         __s32 *contactid;       /* the device ContactID assigned to this slot */
 110         bool *tip_state;        /* is the touch valid? */
 111         bool *inrange_state;    /* is the finger in proximity of the sensor? */
 112         bool *confidence_state; /* is the touch made by a finger? */
 113 };
 114
 115 struct mt_application {
 116         struct list_head list;
 117         unsigned int application;
 118         unsigned int report_id;
 119         struct list_head mt_usages;     /* mt usages list */
 120
 121         __s32 quirks;
 122
 123         __s32 *scantime;                /* scantime reported */
 124         __s32 scantime_logical_max;     /* max value for raw scantime */
 125
 126         __s32 *raw_cc;                  /* contact count in the report */
 127         int left_button_state;          /* left button state */
 128         unsigned int mt_flags;          /* flags to pass to input-mt */
 129
 130         unsigned long *pending_palm_slots;      /* slots where we reported palm
 131                                                  * and need to release */
 132
 133         __u8 num_received;      /* how many contacts we received */
 134         __u8 num_expected;      /* expected last contact index */
 135         __u8 buttons_count;     /* number of physical buttons per touchpad */
 136         __u8 touches_by_report; /* how many touches are present in one report:
 137                                  * 1 means we should use a serial protocol
 138                                  * > 1 means hybrid (multitouch) protocol
 139                                  */
 140
 141         unsigned long jiffies;  /* the frame's jiffies */
 142         int timestamp;          /* the timestamp to be sent */
 143         int prev_scantime;              /* scantime reported previously */
 144
 145         bool have_contact_count;
 146 };
 147
 148 struct mt_class {
 149         __s32 name;     /* MT_CLS */
 150         __s32 quirks;
 151         __s32 sn_move;  /* Signal/noise ratio for move events */
 152         __s32 sn_width; /* Signal/noise ratio for width events */
 153         __s32 sn_height;        /* Signal/noise ratio for height events */
 154         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 155         __u8 maxcontacts;
 156         bool is_indirect;       /* true for touchpads */
 157         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 158 };
 159
 160 struct mt_report_data {
 161         struct list_head list;
 162         struct hid_report *report;
 163         struct mt_application *application;
 164         bool is_mt_collection;
 165 };
 166
 167 struct mt_device {
 168         struct mt_class mtclass;        /* our mt device class */
 169         struct timer_list release_timer;        /* to release sticky fingers */
 170         struct hid_device *hdev;        /* hid_device we're attached to */
 171         unsigned long mt_io_flags;      /* mt flags (MT_IO_FLAGS_*) */
 172         __u8 inputmode_value;   /* InputMode HID feature value */
 173         __u8 maxcontacts;
 174         bool is_buttonpad;      /* is this device a button pad? */
 175         bool serial_maybe;      /* need to check for serial protocol */
 176
 177         struct list_head applications;
 178         struct list_head reports;
 179 };
 180
 181 static void mt_post_parse_default_settings(struct mt_device *td,
 182                                            struct mt_application *app);
 183 static void mt_post_parse(struct mt_device *td, struct mt_application *app);
 184
 185 /* classes of device behavior */
 186 #define MT_CLS_DEFAULT                          0x0001
 187
 188 #define MT_CLS_SERIAL                           0x0002
 189 #define MT_CLS_CONFIDENCE                       0x0003
 190 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 191 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 192 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 193 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 194 /* reserved                                     0x0008 */
 195 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 196 #define MT_CLS_NSMU                             0x000a
 197 /* reserved                                     0x0010 */
 198 /* reserved                                     0x0011 */
 199 #define MT_CLS_WIN_8                            0x0012
 200 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 201 /* reserved                                     0x0014 */
 202 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT          0x0015
 203 #define MT_CLS_WIN_8_DISABLE_WAKEUP             0x0016
 204 #define MT_CLS_WIN_8_NO_STICKY_FINGERS          0x0017
 205 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU     0x0018
 206
 207 /* vendor specific classes */
 208 #define MT_CLS_3M                               0x0101
 209 /* reserved                                     0x0102 */
 210 #define MT_CLS_EGALAX                           0x0103
 211 #define MT_CLS_EGALAX_SERIAL                    0x0104
 212 #define MT_CLS_TOPSEED                          0x0105
 213 #define MT_CLS_PANASONIC                        0x0106
 214 #define MT_CLS_FLATFROG                         0x0107
 215 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 216 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 217 #define MT_CLS_LG                               0x010a
 218 #define MT_CLS_ASUS                             0x010b
 219 #define MT_CLS_VTL                              0x0110
 220 #define MT_CLS_GOOGLE                           0x0111
 221 #define MT_CLS_RAZER_BLADE_STEALTH              0x0112
 222 #define MT_CLS_SMART_TECH                       0x0113
 223 #define MT_CLS_SIS                              0x0457
 224
 225 #define MT_DEFAULT_MAXCONTACT   10
 226 #define MT_MAX_MAXCONTACT       250
 227
 228 /*
 229  * Resync device and local timestamps after that many microseconds without
 230  * receiving data.
 231  */
 232 #define MAX_TIMESTAMP_INTERVAL  1000000
 233
 234 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 235 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 236
 237 /*
 238  * these device-dependent functions determine what slot corresponds
 239  * to a valid contact that was just read.
 240  */
 241
 242 static int cypress_compute_slot(struct mt_application *application,
 243                                 struct mt_usages *slot)
 244 {
 245         if (*slot->contactid != 0 || application->num_received == 0)
 246                 return *slot->contactid;
 247         else
 248                 return -1;
 249 }
 250
 251 static const struct mt_class mt_classes[] = {
 252         { .name = MT_CLS_DEFAULT,
 253                 .quirks = MT_QUIRK_ALWAYS_VALID |
 254                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 255         { .name = MT_CLS_NSMU,
 256                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 257         { .name = MT_CLS_SERIAL,
 258                 .quirks = MT_QUIRK_ALWAYS_VALID},
 259         { .name = MT_CLS_CONFIDENCE,
 260                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 261         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 262                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 263                         MT_QUIRK_SLOT_IS_CONTACTID },
 264         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 265                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 266                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 267         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 268                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 269                         MT_QUIRK_SLOT_IS_CONTACTID,
 270                 .maxcontacts = 2 },
 271         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 272                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 273                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 274                 .maxcontacts = 2 },
 275         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 276                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 277                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 278         { .name = MT_CLS_WIN_8,
 279                 .quirks = MT_QUIRK_ALWAYS_VALID |
 280                         MT_QUIRK_IGNORE_DUPLICATES |
 281                         MT_QUIRK_HOVERING |
 282                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 283                         MT_QUIRK_STICKY_FINGERS |
 284                         MT_QUIRK_WIN8_PTP_BUTTONS,
 285                 .export_all_inputs = true },
 286         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 287                 .quirks = MT_QUIRK_ALWAYS_VALID |
 288                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 289                 .export_all_inputs = true },
 290         { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
 291                 .quirks = MT_QUIRK_ALWAYS_VALID |
 292                         MT_QUIRK_IGNORE_DUPLICATES |
 293                         MT_QUIRK_HOVERING |
 294                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 295                         MT_QUIRK_STICKY_FINGERS |
 296                         MT_QUIRK_WIN8_PTP_BUTTONS |
 297                         MT_QUIRK_FORCE_MULTI_INPUT,
 298                 .export_all_inputs = true },
 299         { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
 300                 .quirks = MT_QUIRK_IGNORE_DUPLICATES |
 301                         MT_QUIRK_HOVERING |
 302                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 303                         MT_QUIRK_STICKY_FINGERS |
 304                         MT_QUIRK_WIN8_PTP_BUTTONS |
 305                         MT_QUIRK_FORCE_MULTI_INPUT |
 306                         MT_QUIRK_NOT_SEEN_MEANS_UP,
 307                 .export_all_inputs = true },
 308         { .name = MT_CLS_WIN_8_DISABLE_WAKEUP,
 309                 .quirks = MT_QUIRK_ALWAYS_VALID |
 310                         MT_QUIRK_IGNORE_DUPLICATES |
 311                         MT_QUIRK_HOVERING |
 312                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 313                         MT_QUIRK_STICKY_FINGERS |
 314                         MT_QUIRK_WIN8_PTP_BUTTONS |
 315                         MT_QUIRK_DISABLE_WAKEUP,
 316                 .export_all_inputs = true },
 317         { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS,
 318                 .quirks = MT_QUIRK_ALWAYS_VALID |
 319                         MT_QUIRK_IGNORE_DUPLICATES |
 320                         MT_QUIRK_HOVERING |
 321                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 322                         MT_QUIRK_WIN8_PTP_BUTTONS,
 323                 .export_all_inputs = true },
 324
 325         /*
 326          * vendor specific classes
 327          */
 328         { .name = MT_CLS_3M,
 329                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 330                         MT_QUIRK_SLOT_IS_CONTACTID |
 331                         MT_QUIRK_TOUCH_SIZE_SCALING,
 332                 .sn_move = 2048,
 333                 .sn_width = 128,
 334                 .sn_height = 128,
 335                 .maxcontacts = 60,
 336         },
 337         { .name = MT_CLS_EGALAX,
 338                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 339                         MT_QUIRK_VALID_IS_INRANGE,
 340                 .sn_move = 4096,
 341                 .sn_pressure = 32,
 342         },
 343         { .name = MT_CLS_EGALAX_SERIAL,
 344                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 345                         MT_QUIRK_ALWAYS_VALID,
 346                 .sn_move = 4096,
 347                 .sn_pressure = 32,
 348         },
 349         { .name = MT_CLS_TOPSEED,
 350                 .quirks = MT_QUIRK_ALWAYS_VALID,
 351                 .is_indirect = true,
 352                 .maxcontacts = 2,
 353         },
 354         { .name = MT_CLS_PANASONIC,
 355                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 356                 .maxcontacts = 4 },
 357         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 358                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 359                         MT_QUIRK_VALID_IS_INRANGE |
 360                         MT_QUIRK_SLOT_IS_CONTACTID,
 361                 .maxcontacts = 2
 362         },
 363         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 364                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 365                         MT_QUIRK_SLOT_IS_CONTACTID
 366         },
 367
 368         { .name = MT_CLS_FLATFROG,
 369                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 370                         MT_QUIRK_NO_AREA,
 371                 .sn_move = 2048,
 372                 .maxcontacts = 40,
 373         },
 374         { .name = MT_CLS_LG,
 375                 .quirks = MT_QUIRK_ALWAYS_VALID |
 376                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 377                         MT_QUIRK_IGNORE_DUPLICATES |
 378                         MT_QUIRK_HOVERING |
 379                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 380         { .name = MT_CLS_ASUS,
 381                 .quirks = MT_QUIRK_ALWAYS_VALID |
 382                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 383                         MT_QUIRK_ASUS_CUSTOM_UP },
 384         { .name = MT_CLS_VTL,
 385                 .quirks = MT_QUIRK_ALWAYS_VALID |
 386                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 387                         MT_QUIRK_FORCE_GET_FEATURE,
 388         },
 389         { .name = MT_CLS_GOOGLE,
 390                 .quirks = MT_QUIRK_ALWAYS_VALID |
 391                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 392                         MT_QUIRK_SLOT_IS_CONTACTID |
 393                         MT_QUIRK_HOVERING
 394         },
 395         { .name = MT_CLS_RAZER_BLADE_STEALTH,
 396                 .quirks = MT_QUIRK_ALWAYS_VALID |
 397                         MT_QUIRK_IGNORE_DUPLICATES |
 398                         MT_QUIRK_HOVERING |
 399                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 400                         MT_QUIRK_WIN8_PTP_BUTTONS,
 401         },
 402         { .name = MT_CLS_SMART_TECH,
 403                 .quirks = MT_QUIRK_ALWAYS_VALID |
 404                         MT_QUIRK_IGNORE_DUPLICATES |
 405                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 406                         MT_QUIRK_SEPARATE_APP_REPORT,
 407         },
 408         { .name = MT_CLS_SIS,
 409                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 410                         MT_QUIRK_ALWAYS_VALID |
 411                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 412         },
 413         { }
 414 };
 415
 416 static ssize_t mt_show_quirks(struct device *dev,
 417                            struct device_attribute *attr,
 418                            char *buf)
 419 {
 420         struct hid_device *hdev = to_hid_device(dev);
 421         struct mt_device *td = hid_get_drvdata(hdev);
 422
 423         return sprintf(buf, "%u\n", td->mtclass.quirks);
 424 }
 425
 426 static ssize_t mt_set_quirks(struct device *dev,
 427                           struct device_attribute *attr,
 428                           const char *buf, size_t count)
 429 {
 430         struct hid_device *hdev = to_hid_device(dev);
 431         struct mt_device *td = hid_get_drvdata(hdev);
 432         struct mt_application *application;
 433
 434         unsigned long val;
 435
 436         if (kstrtoul(buf, 0, &val))
 437                 return -EINVAL;
 438
 439         td->mtclass.quirks = val;
 440
 441         list_for_each_entry(application, &td->applications, list) {
 442                 application->quirks = val;
 443                 if (!application->have_contact_count)
 444                         application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 445         }
 446
 447         return count;
 448 }
 449
 450 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 451
 452 static struct attribute *sysfs_attrs[] = {
 453         &dev_attr_quirks.attr,
 454         NULL
 455 };
 456
 457 static const struct attribute_group mt_attribute_group = {
 458         .attrs = sysfs_attrs
 459 };
 460
 461 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 462 {
 463         int ret;
 464         u32 size = hid_report_len(report);
 465         u8 *buf;
 466
 467         /*
 468          * Do not fetch the feature report if the device has been explicitly
 469          * marked as non-capable.
 470          */
 471         if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS)
 472                 return;
 473
 474         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 475         if (!buf)
 476                 return;
 477
 478         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 479                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 480         if (ret < 0) {
 481                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 482                          report->id);
 483         } else {
 484                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 485                                            size, 0);
 486                 if (ret)
 487                         dev_warn(&hdev->dev, "failed to report feature\n");
 488         }
 489
 490         kfree(buf);
 491 }
 492
 493 static void mt_feature_mapping(struct hid_device *hdev,
 494                 struct hid_field *field, struct hid_usage *usage)
 495 {
 496         struct mt_device *td = hid_get_drvdata(hdev);
 497
 498         switch (usage->hid) {
 499         case HID_DG_CONTACTMAX:
 500                 mt_get_feature(hdev, field->report);
 501
 502                 td->maxcontacts = field->value[0];
 503                 if (!td->maxcontacts &&
 504                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 505                         td->maxcontacts = field->logical_maximum;
 506                 if (td->mtclass.maxcontacts)
 507                         /* check if the maxcontacts is given by the class */
 508                         td->maxcontacts = td->mtclass.maxcontacts;
 509
 510                 break;
 511         case HID_DG_BUTTONTYPE:
 512                 if (usage->usage_index >= field->report_count) {
 513                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 514                         break;
 515                 }
 516
 517                 mt_get_feature(hdev, field->report);
 518                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 519                         td->is_buttonpad = true;
 520
 521                 break;
 522         case 0xff0000c5:
 523                 /* Retrieve the Win8 blob once to enable some devices */
 524                 if (usage->usage_index == 0)
 525                         mt_get_feature(hdev, field->report);
 526                 break;
 527         }
 528 }
 529
 530 static void set_abs(struct input_dev *input, unsigned int code,
 531                 struct hid_field *field, int snratio)
 532 {
 533         int fmin = field->logical_minimum;
 534         int fmax = field->logical_maximum;
 535         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 536         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 537         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 538 }
 539
 540 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev,
 541                                            struct mt_application *application)
 542 {
 543         struct mt_usages *usage;
 544
 545         usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL);
 546         if (!usage)
 547                 return NULL;
 548
 549         /* set some defaults so we do not need to check for null pointers */
 550         usage->x = DEFAULT_ZERO;
 551         usage->y = DEFAULT_ZERO;
 552         usage->cx = DEFAULT_ZERO;
 553         usage->cy = DEFAULT_ZERO;
 554         usage->p = DEFAULT_ZERO;
 555         usage->w = DEFAULT_ZERO;
 556         usage->h = DEFAULT_ZERO;
 557         usage->a = DEFAULT_ZERO;
 558         usage->contactid = DEFAULT_ZERO;
 559         usage->tip_state = DEFAULT_FALSE;
 560         usage->inrange_state = DEFAULT_FALSE;
 561         usage->confidence_state = DEFAULT_TRUE;
 562
 563         list_add_tail(&usage->list, &application->mt_usages);
 564
 565         return usage;
 566 }
 567
 568 static struct mt_application *mt_allocate_application(struct mt_device *td,
 569                                                       struct hid_report *report)
 570 {
 571         unsigned int application = report->application;
 572         struct mt_application *mt_application;
 573
 574         mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application),
 575                                       GFP_KERNEL);
 576         if (!mt_application)
 577                 return NULL;
 578
 579         mt_application->application = application;
 580         INIT_LIST_HEAD(&mt_application->mt_usages);
 581
 582         if (application == HID_DG_TOUCHSCREEN)
 583                 mt_application->mt_flags |= INPUT_MT_DIRECT;
 584
 585         /*
 586          * Model touchscreens providing buttons as touchpads.
 587          */
 588         if (application == HID_DG_TOUCHPAD) {
 589                 mt_application->mt_flags |= INPUT_MT_POINTER;
 590                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 591         }
 592
 593         mt_application->scantime = DEFAULT_ZERO;
 594         mt_application->raw_cc = DEFAULT_ZERO;
 595         mt_application->quirks = td->mtclass.quirks;
 596         mt_application->report_id = report->id;
 597
 598         list_add_tail(&mt_application->list, &td->applications);
 599
 600         return mt_application;
 601 }
 602
 603 static struct mt_application *mt_find_application(struct mt_device *td,
 604                                                   struct hid_report *report)
 605 {
 606         unsigned int application = report->application;
 607         struct mt_application *tmp, *mt_application = NULL;
 608
 609         list_for_each_entry(tmp, &td->applications, list) {
 610                 if (application == tmp->application) {
 611                         if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) ||
 612                             tmp->report_id == report->id) {
 613                                 mt_application = tmp;
 614                                 break;
 615                         }
 616                 }
 617         }
 618
 619         if (!mt_application)
 620                 mt_application = mt_allocate_application(td, report);
 621
 622         return mt_application;
 623 }
 624
 625 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td,
 626                                                       struct hid_report *report)
 627 {
 628         struct mt_report_data *rdata;
 629         struct hid_field *field;
 630         int r, n;
 631
 632         rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL);
 633         if (!rdata)
 634                 return NULL;
 635
 636         rdata->report = report;
 637         rdata->application = mt_find_application(td, report);
 638
 639         if (!rdata->application) {
 640                 devm_kfree(&td->hdev->dev, rdata);
 641                 return NULL;
 642         }
 643
 644         for (r = 0; r < report->maxfield; r++) {
 645                 field = report->field[r];
 646
 647                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 648                         continue;
 649
 650                 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) {
 651                         for (n = 0; n < field->report_count; n++) {
 652                                 if (field->usage[n].hid == HID_DG_CONTACTID) {
 653                                         rdata->is_mt_collection = true;
 654                                         break;
 655                                 }
 656                         }
 657                 }
 658         }
 659
 660         list_add_tail(&rdata->list, &td->reports);
 661
 662         return rdata;
 663 }
 664
 665 static struct mt_report_data *mt_find_report_data(struct mt_device *td,
 666                                                   struct hid_report *report)
 667 {
 668         struct mt_report_data *tmp, *rdata = NULL;
 669
 670         list_for_each_entry(tmp, &td->reports, list) {
 671                 if (report == tmp->report) {
 672                         rdata = tmp;
 673                         break;
 674                 }
 675         }
 676
 677         if (!rdata)
 678                 rdata = mt_allocate_report_data(td, report);
 679
 680         return rdata;
 681 }
 682
 683 static void mt_store_field(struct hid_device *hdev,
 684                            struct mt_application *application,
 685                            __s32 *value,
 686                            size_t offset)
 687 {
 688         struct mt_usages *usage;
 689         __s32 **target;
 690
 691         if (list_empty(&application->mt_usages))
 692                 usage = mt_allocate_usage(hdev, application);
 693         else
 694                 usage = list_last_entry(&application->mt_usages,
 695                                         struct mt_usages,
 696                                         list);
 697
 698         if (!usage)
 699                 return;
 700
 701         target = (__s32 **)((char *)usage + offset);
 702
 703         /* the value has already been filled, create a new slot */
 704         if (*target != DEFAULT_TRUE &&
 705             *target != DEFAULT_FALSE &&
 706             *target != DEFAULT_ZERO) {
 707                 if (usage->contactid == DEFAULT_ZERO ||
 708                     usage->x == DEFAULT_ZERO ||
 709                     usage->y == DEFAULT_ZERO) {
 710                         hid_dbg(hdev,
 711                                 "ignoring duplicate usage on incomplete");
 712                         return;
 713                 }
 714                 usage = mt_allocate_usage(hdev, application);
 715                 if (!usage)
 716                         return;
 717
 718                 target = (__s32 **)((char *)usage + offset);
 719         }
 720
 721         *target = value;
 722 }
 723
 724 #define MT_STORE_FIELD(__name)                                          \
 725         mt_store_field(hdev, app,                                       \
 726                        &field->value[usage->usage_index],               \
 727                        offsetof(struct mt_usages, __name))
 728
 729 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 730                 struct hid_field *field, struct hid_usage *usage,
 731                 unsigned long **bit, int *max, struct mt_application *app)
 732 {
 733         struct mt_device *td = hid_get_drvdata(hdev);
 734         struct mt_class *cls = &td->mtclass;
 735         int code;
 736         struct hid_usage *prev_usage = NULL;
 737
 738         /*
 739          * Model touchscreens providing buttons as touchpads.
 740          */
 741         if (field->application == HID_DG_TOUCHSCREEN &&
 742             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 743                 app->mt_flags |= INPUT_MT_POINTER;
 744                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 745         }
 746
 747         /* count the buttons on touchpads */
 748         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 749                 app->buttons_count++;
 750
 751         if (usage->usage_index)
 752                 prev_usage = &field->usage[usage->usage_index - 1];
 753
 754         switch (usage->hid & HID_USAGE_PAGE) {
 755
 756         case HID_UP_GENDESK:
 757                 switch (usage->hid) {
 758                 case HID_GD_X:
 759                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 760                                 code = ABS_MT_TOOL_X;
 761                                 MT_STORE_FIELD(cx);
 762                         } else {
 763                                 code = ABS_MT_POSITION_X;
 764                                 MT_STORE_FIELD(x);
 765                         }
 766
 767                         set_abs(hi->input, code, field, cls->sn_move);
 768
 769                         /*
 770                          * A system multi-axis that exports X and Y has a high
 771                          * chance of being used directly on a surface
 772                          */
 773                         if (field->application == HID_GD_SYSTEM_MULTIAXIS) {
 774                                 __set_bit(INPUT_PROP_DIRECT,
 775                                           hi->input->propbit);
 776                                 input_set_abs_params(hi->input,
 777                                                      ABS_MT_TOOL_TYPE,
 778                                                      MT_TOOL_DIAL,
 779                                                      MT_TOOL_DIAL, 0, 0);
 780                         }
 781
 782                         return 1;
 783                 case HID_GD_Y:
 784                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 785                                 code = ABS_MT_TOOL_Y;
 786                                 MT_STORE_FIELD(cy);
 787                         } else {
 788                                 code = ABS_MT_POSITION_Y;
 789                                 MT_STORE_FIELD(y);
 790                         }
 791
 792                         set_abs(hi->input, code, field, cls->sn_move);
 793
 794                         return 1;
 795                 }
 796                 return 0;
 797
 798         case HID_UP_DIGITIZER:
 799                 switch (usage->hid) {
 800                 case HID_DG_INRANGE:
 801                         if (app->quirks & MT_QUIRK_HOVERING) {
 802                                 input_set_abs_params(hi->input,
 803                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 804                         }
 805                         MT_STORE_FIELD(inrange_state);
 806                         return 1;
 807                 case HID_DG_CONFIDENCE:
 808                         if ((cls->name == MT_CLS_WIN_8 ||
 809                              cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT ||
 810                              cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU ||
 811                              cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) &&
 812                                 (field->application == HID_DG_TOUCHPAD ||
 813                                  field->application == HID_DG_TOUCHSCREEN))
 814                                 app->quirks |= MT_QUIRK_CONFIDENCE;
 815
 816                         if (app->quirks & MT_QUIRK_CONFIDENCE)
 817                                 input_set_abs_params(hi->input,
 818                                                      ABS_MT_TOOL_TYPE,
 819                                                      MT_TOOL_FINGER,
 820                                                      MT_TOOL_PALM, 0, 0);
 821
 822                         MT_STORE_FIELD(confidence_state);
 823                         return 1;
 824                 case HID_DG_TIPSWITCH:
 825                         if (field->application != HID_GD_SYSTEM_MULTIAXIS)
 826                                 input_set_capability(hi->input,
 827                                                      EV_KEY, BTN_TOUCH);
 828                         MT_STORE_FIELD(tip_state);
 829                         return 1;
 830                 case HID_DG_CONTACTID:
 831                         MT_STORE_FIELD(contactid);
 832                         app->touches_by_report++;
 833                         return 1;
 834                 case HID_DG_WIDTH:
 835                         if (!(app->quirks & MT_QUIRK_NO_AREA))
 836                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 837                                         cls->sn_width);
 838                         MT_STORE_FIELD(w);
 839                         return 1;
 840                 case HID_DG_HEIGHT:
 841                         if (!(app->quirks & MT_QUIRK_NO_AREA)) {
 842                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 843                                         cls->sn_height);
 844
 845                                 /*
 846                                  * Only set ABS_MT_ORIENTATION if it is not
 847                                  * already set by the HID_DG_AZIMUTH usage.
 848                                  */
 849                                 if (!test_bit(ABS_MT_ORIENTATION,
 850                                                 hi->input->absbit))
 851                                         input_set_abs_params(hi->input,
 852                                                 ABS_MT_ORIENTATION, 0, 1, 0, 0);
 853                         }
 854                         MT_STORE_FIELD(h);
 855                         return 1;
 856                 case HID_DG_TIPPRESSURE:
 857                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 858                                 cls->sn_pressure);
 859                         MT_STORE_FIELD(p);
 860                         return 1;
 861                 case HID_DG_SCANTIME:
 862                         input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
 863                         app->scantime = &field->value[usage->usage_index];
 864                         app->scantime_logical_max = field->logical_maximum;
 865                         return 1;
 866                 case HID_DG_CONTACTCOUNT:
 867                         app->have_contact_count = true;
 868                         app->raw_cc = &field->value[usage->usage_index];
 869                         return 1;
 870                 case HID_DG_AZIMUTH:
 871                         /*
 872                          * Azimuth has the range of [0, MAX) representing a full
 873                          * revolution. Set ABS_MT_ORIENTATION to a quarter of
 874                          * MAX according the definition of ABS_MT_ORIENTATION
 875                          */
 876                         input_set_abs_params(hi->input, ABS_MT_ORIENTATION,
 877                                 -field->logical_maximum / 4,
 878                                 field->logical_maximum / 4,
 879                                 cls->sn_move ?
 880                                 field->logical_maximum / cls->sn_move : 0, 0);
 881                         MT_STORE_FIELD(a);
 882                         return 1;
 883                 case HID_DG_CONTACTMAX:
 884                         /* contact max are global to the report */
 885                         return -1;
 886                 case HID_DG_TOUCH:
 887                         /* Legacy devices use TIPSWITCH and not TOUCH.
 888                          * Let's just ignore this field. */
 889                         return -1;
 890                 }
 891                 /* let hid-input decide for the others */
 892                 return 0;
 893
 894         case HID_UP_BUTTON:
 895                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 896                 /*
 897                  * MS PTP spec says that external buttons left and right have
 898                  * usages 2 and 3.
 899                  */
 900                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
 901                     field->application == HID_DG_TOUCHPAD &&
 902                     (usage->hid & HID_USAGE) > 1)
 903                         code--;
 904
 905                 if (field->application == HID_GD_SYSTEM_MULTIAXIS)
 906                         code = BTN_0  + ((usage->hid - 1) & HID_USAGE);
 907
 908                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 909                 if (!*bit)
 910                         return -1;
 911                 input_set_capability(hi->input, EV_KEY, code);
 912                 return 1;
 913
 914         case 0xff000000:
 915                 /* we do not want to map these: no input-oriented meaning */
 916                 return -1;
 917         }
 918
 919         return 0;
 920 }
 921
 922 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
 923                            struct mt_usages *slot,
 924                            struct input_dev *input)
 925 {
 926         __s32 quirks = app->quirks;
 927
 928         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 929                 return *slot->contactid;
 930
 931         if (quirks & MT_QUIRK_CYPRESS)
 932                 return cypress_compute_slot(app, slot);
 933
 934         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 935                 return app->num_received;
 936
 937         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 938                 return *slot->contactid - 1;
 939
 940         return input_mt_get_slot_by_key(input, *slot->contactid);
 941 }
 942
 943 static void mt_release_pending_palms(struct mt_device *td,
 944                                      struct mt_application *app,
 945                                      struct input_dev *input)
 946 {
 947         int slotnum;
 948         bool need_sync = false;
 949
 950         for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) {
 951                 clear_bit(slotnum, app->pending_palm_slots);
 952
 953                 input_mt_slot(input, slotnum);
 954                 input_mt_report_slot_inactive(input);
 955
 956                 need_sync = true;
 957         }
 958
 959         if (need_sync) {
 960                 input_mt_sync_frame(input);
 961                 input_sync(input);
 962         }
 963 }
 964
 965 /*
 966  * this function is called when a whole packet has been received and processed,
 967  * so that it can decide what to send to the input layer.
 968  */
 969 static void mt_sync_frame(struct mt_device *td, struct mt_application *app,
 970                           struct input_dev *input)
 971 {
 972         if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS)
 973                 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state);
 974
 975         input_mt_sync_frame(input);
 976         input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp);
 977         input_sync(input);
 978
 979         mt_release_pending_palms(td, app, input);
 980
 981         app->num_received = 0;
 982         app->left_button_state = 0;
 983
 984         if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
 985                 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 986         else
 987                 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 988         clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 989 }
 990
 991 static int mt_compute_timestamp(struct mt_application *app, __s32 value)
 992 {
 993         long delta = value - app->prev_scantime;
 994         unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies);
 995
 996         app->jiffies = jiffies;
 997
 998         if (delta < 0)
 999                 delta += app->scantime_logical_max;
1000
1001         /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
1002         delta *= 100;
1003
1004         if (jdelta > MAX_TIMESTAMP_INTERVAL)
1005                 /* No data received for a while, resync the timestamp. */
1006                 return 0;
1007         else
1008                 return app->timestamp + delta;
1009 }
1010
1011 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
1012                                 struct hid_usage *usage, __s32 value)
1013 {
1014         /* we will handle the hidinput part later, now remains hiddev */
1015         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
1016                 hid->hiddev_hid_event(hid, field, usage, value);
1017
1018         return 1;
1019 }
1020
1021 static int mt_process_slot(struct mt_device *td, struct input_dev *input,
1022                             struct mt_application *app,
1023                             struct mt_usages *slot)
1024 {
1025         struct input_mt *mt = input->mt;
1026         struct hid_device *hdev = td->hdev;
1027         __s32 quirks = app->quirks;
1028         bool valid = true;
1029         bool confidence_state = true;
1030         bool inrange_state = false;
1031         int active;
1032         int slotnum;
1033         int tool = MT_TOOL_FINGER;
1034
1035         if (!slot)
1036                 return -EINVAL;
1037
1038         if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
1039             app->num_received >= app->num_expected)
1040                 return -EAGAIN;
1041
1042         if (!(quirks & MT_QUIRK_ALWAYS_VALID)) {
1043                 if (quirks & MT_QUIRK_VALID_IS_INRANGE)
1044                         valid = *slot->inrange_state;
1045                 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1046                         valid = *slot->tip_state;
1047                 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
1048                         valid = *slot->confidence_state;
1049
1050                 if (!valid)
1051                         return 0;
1052         }
1053
1054         slotnum = mt_compute_slot(td, app, slot, input);
1055         if (slotnum < 0 || slotnum >= td->maxcontacts)
1056                 return 0;
1057
1058         if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
1059                 struct input_mt_slot *i_slot = &mt->slots[slotnum];
1060
1061                 if (input_mt_is_active(i_slot) &&
1062                     input_mt_is_used(mt, i_slot))
1063                         return -EAGAIN;
1064         }
1065
1066         if (quirks & MT_QUIRK_CONFIDENCE)
1067                 confidence_state = *slot->confidence_state;
1068
1069         if (quirks & MT_QUIRK_HOVERING)
1070                 inrange_state = *slot->inrange_state;
1071
1072         active = *slot->tip_state || inrange_state;
1073
1074         if (app->application == HID_GD_SYSTEM_MULTIAXIS)
1075                 tool = MT_TOOL_DIAL;
1076         else if (unlikely(!confidence_state)) {
1077                 tool = MT_TOOL_PALM;
1078                 if (!active && mt &&
1079                     input_mt_is_active(&mt->slots[slotnum])) {
1080                         /*
1081                          * The non-confidence was reported for
1082                          * previously valid contact that is also no
1083                          * longer valid. We can't simply report
1084                          * lift-off as userspace will not be aware
1085                          * of non-confidence, so we need to split
1086                          * it into 2 events: active MT_TOOL_PALM
1087                          * and a separate liftoff.
1088                          */
1089                         active = true;
1090                         set_bit(slotnum, app->pending_palm_slots);
1091                 }
1092         }
1093
1094         input_mt_slot(input, slotnum);
1095         input_mt_report_slot_state(input, tool, active);
1096         if (active) {
1097                 /* this finger is in proximity of the sensor */
1098                 int wide = (*slot->w > *slot->h);
1099                 int major = max(*slot->w, *slot->h);
1100                 int minor = min(*slot->w, *slot->h);
1101                 int orientation = wide;
1102                 int max_azimuth;
1103                 int azimuth;
1104                 int x;
1105                 int y;
1106                 int cx;
1107                 int cy;
1108
1109                 if (slot->a != DEFAULT_ZERO) {
1110                         /*
1111                          * Azimuth is counter-clockwise and ranges from [0, MAX)
1112                          * (a full revolution). Convert it to clockwise ranging
1113                          * [-MAX/2, MAX/2].
1114                          *
1115                          * Note that ABS_MT_ORIENTATION require us to report
1116                          * the limit of [-MAX/4, MAX/4], but the value can go
1117                          * out of range to [-MAX/2, MAX/2] to report an upside
1118                          * down ellipsis.
1119                          */
1120                         azimuth = *slot->a;
1121                         max_azimuth = input_abs_get_max(input,
1122                                                         ABS_MT_ORIENTATION);
1123                         if (azimuth > max_azimuth * 2)
1124                                 azimuth -= max_azimuth * 4;
1125                         orientation = -azimuth;
1126                         if (quirks & MT_QUIRK_ORIENTATION_INVERT)
1127                                 orientation = -orientation;
1128
1129                 }
1130
1131                 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
1132                         /*
1133                          * divided by two to match visual scale of touch
1134                          * for devices with this quirk
1135                          */
1136                         major = major >> 1;
1137                         minor = minor >> 1;
1138                 }
1139
1140                 x = hdev->quirks & HID_QUIRK_X_INVERT ?
1141                         input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->x :
1142                         *slot->x;
1143                 y = hdev->quirks & HID_QUIRK_Y_INVERT ?
1144                         input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->y :
1145                         *slot->y;
1146                 cx = hdev->quirks & HID_QUIRK_X_INVERT ?
1147                         input_abs_get_max(input, ABS_MT_POSITION_X) - *slot->cx :
1148                         *slot->cx;
1149                 cy = hdev->quirks & HID_QUIRK_Y_INVERT ?
1150                         input_abs_get_max(input, ABS_MT_POSITION_Y) - *slot->cy :
1151                         *slot->cy;
1152
1153                 input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
1154                 input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
1155                 input_event(input, EV_ABS, ABS_MT_TOOL_X, cx);
1156                 input_event(input, EV_ABS, ABS_MT_TOOL_Y, cy);
1157                 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);
1158                 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation);
1159                 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p);
1160                 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
1161                 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
1162
1163                 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
1164         }
1165
1166         return 0;
1167 }
1168
1169 static void mt_process_mt_event(struct hid_device *hid,
1170                                 struct mt_application *app,
1171                                 struct hid_field *field,
1172                                 struct hid_usage *usage,
1173                                 __s32 value,
1174                                 bool first_packet)
1175 {
1176         __s32 quirks = app->quirks;
1177         struct input_dev *input = field->hidinput->input;
1178
1179         if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT))
1180                 return;
1181
1182         if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) {
1183
1184                 /*
1185                  * For Win8 PTP touchpads we should only look at
1186                  * non finger/touch events in the first_packet of a
1187                  * (possible) multi-packet frame.
1188                  */
1189                 if (!first_packet)
1190                         return;
1191
1192                 /*
1193                  * For Win8 PTP touchpads we map both the clickpad click
1194                  * and any "external" left buttons to BTN_LEFT if a
1195                  * device claims to have both we need to report 1 for
1196                  * BTN_LEFT if either is pressed, so we or all values
1197                  * together and report the result in mt_sync_frame().
1198                  */
1199                 if (usage->type == EV_KEY && usage->code == BTN_LEFT) {
1200                         app->left_button_state |= value;
1201                         return;
1202                 }
1203         }
1204
1205         input_event(input, usage->type, usage->code, value);
1206 }
1207
1208 static void mt_touch_report(struct hid_device *hid,
1209                             struct mt_report_data *rdata)
1210 {
1211         struct mt_device *td = hid_get_drvdata(hid);
1212         struct hid_report *report = rdata->report;
1213         struct mt_application *app = rdata->application;
1214         struct hid_field *field;
1215         struct input_dev *input;
1216         struct mt_usages *slot;
1217         bool first_packet;
1218         unsigned count;
1219         int r, n;
1220         int scantime = 0;
1221         int contact_count = -1;
1222
1223         /* sticky fingers release in progress, abort */
1224         if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1225                 return;
1226
1227         scantime = *app->scantime;
1228         app->timestamp = mt_compute_timestamp(app, scantime);
1229         if (app->raw_cc != DEFAULT_ZERO)
1230                 contact_count = *app->raw_cc;
1231
1232         /*
1233          * Includes multi-packet support where subsequent
1234          * packets are sent with zero contactcount.
1235          */
1236         if (contact_count >= 0) {
1237                 /*
1238                  * For Win8 PTPs the first packet (td->num_received == 0) may
1239                  * have a contactcount of 0 if there only is a button event.
1240                  * We double check that this is not a continuation packet
1241                  * of a possible multi-packet frame be checking that the
1242                  * timestamp has changed.
1243                  */
1244                 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) &&
1245                     app->num_received == 0 &&
1246                     app->prev_scantime != scantime)
1247                         app->num_expected = contact_count;
1248                 /* A non 0 contact count always indicates a first packet */
1249                 else if (contact_count)
1250                         app->num_expected = contact_count;
1251         }
1252         app->prev_scantime = scantime;
1253
1254         first_packet = app->num_received == 0;
1255
1256         input = report->field[0]->hidinput->input;
1257
1258         list_for_each_entry(slot, &app->mt_usages, list) {
1259                 if (!mt_process_slot(td, input, app, slot))
1260                         app->num_received++;
1261         }
1262
1263         for (r = 0; r < report->maxfield; r++) {
1264                 field = report->field[r];
1265                 count = field->report_count;
1266
1267                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
1268                         continue;
1269
1270                 for (n = 0; n < count; n++)
1271                         mt_process_mt_event(hid, app, field,
1272                                             &field->usage[n], field->value[n],
1273                                             first_packet);
1274         }
1275
1276         if (app->num_received >= app->num_expected)
1277                 mt_sync_frame(td, app, input);
1278
1279         /*
1280          * Windows 8 specs says 2 things:
1281          * - once a contact has been reported, it has to be reported in each
1282          *   subsequent report
1283          * - the report rate when fingers are present has to be at least
1284          *   the refresh rate of the screen, 60 or 120 Hz
1285          *
1286          * I interprete this that the specification forces a report rate of
1287          * at least 60 Hz for a touchscreen to be certified.
1288          * Which means that if we do not get a report whithin 16 ms, either
1289          * something wrong happens, either the touchscreen forgets to send
1290          * a release. Taking a reasonable margin allows to remove issues
1291          * with USB communication or the load of the machine.
1292          *
1293          * Given that Win 8 devices are forced to send a release, this will
1294          * only affect laggish machines and the ones that have a firmware
1295          * defect.
1296          */
1297         if (app->quirks & MT_QUIRK_STICKY_FINGERS) {
1298                 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1299                         mod_timer(&td->release_timer,
1300                                   jiffies + msecs_to_jiffies(100));
1301                 else
1302                         del_timer(&td->release_timer);
1303         }
1304
1305         clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1306 }
1307
1308 static int mt_touch_input_configured(struct hid_device *hdev,
1309                                      struct hid_input *hi,
1310                                      struct mt_application *app)
1311 {
1312         struct mt_device *td = hid_get_drvdata(hdev);
1313         struct mt_class *cls = &td->mtclass;
1314         struct input_dev *input = hi->input;
1315         int ret;
1316
1317         if (!td->maxcontacts)
1318                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
1319
1320         mt_post_parse(td, app);
1321         if (td->serial_maybe)
1322                 mt_post_parse_default_settings(td, app);
1323
1324         if (cls->is_indirect)
1325                 app->mt_flags |= INPUT_MT_POINTER;
1326
1327         if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
1328                 app->mt_flags |= INPUT_MT_DROP_UNUSED;
1329
1330         /* check for clickpads */
1331         if ((app->mt_flags & INPUT_MT_POINTER) &&
1332             (app->buttons_count == 1))
1333                 td->is_buttonpad = true;
1334
1335         if (td->is_buttonpad)
1336                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
1337
1338         app->pending_palm_slots = devm_kcalloc(&hi->input->dev,
1339                                                BITS_TO_LONGS(td->maxcontacts),
1340                                                sizeof(long),
1341                                                GFP_KERNEL);
1342         if (!app->pending_palm_slots)
1343                 return -ENOMEM;
1344
1345         ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags);
1346         if (ret)
1347                 return ret;
1348
1349         app->mt_flags = 0;
1350         return 0;
1351 }
1352
1353 #define mt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, \
1354                                                     max, EV_KEY, (c))
1355 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
1356                 struct hid_field *field, struct hid_usage *usage,
1357                 unsigned long **bit, int *max)
1358 {
1359         struct mt_device *td = hid_get_drvdata(hdev);
1360         struct mt_application *application;
1361         struct mt_report_data *rdata;
1362
1363         rdata = mt_find_report_data(td, field->report);
1364         if (!rdata) {
1365                 hid_err(hdev, "failed to allocate data for report\n");
1366                 return 0;
1367         }
1368
1369         application = rdata->application;
1370
1371         /*
1372          * If mtclass.export_all_inputs is not set, only map fields from
1373          * TouchScreen or TouchPad collections. We need to ignore fields
1374          * that belong to other collections such as Mouse that might have
1375          * the same GenericDesktop usages.
1376          */
1377         if (!td->mtclass.export_all_inputs &&
1378             field->application != HID_DG_TOUCHSCREEN &&
1379             field->application != HID_DG_PEN &&
1380             field->application != HID_DG_TOUCHPAD &&
1381             field->application != HID_GD_KEYBOARD &&
1382             field->application != HID_GD_SYSTEM_CONTROL &&
1383             field->application != HID_CP_CONSUMER_CONTROL &&
1384             field->application != HID_GD_WIRELESS_RADIO_CTLS &&
1385             field->application != HID_GD_SYSTEM_MULTIAXIS &&
1386             !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1387               application->quirks & MT_QUIRK_ASUS_CUSTOM_UP))
1388                 return -1;
1389
1390         /*
1391          * Some Asus keyboard+touchpad devices have the hotkeys defined in the
1392          * touchpad report descriptor. We need to treat these as an array to
1393          * map usages to input keys.
1394          */
1395         if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
1396             application->quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
1397             (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
1398                 set_bit(EV_REP, hi->input->evbit);
1399                 if (field->flags & HID_MAIN_ITEM_VARIABLE)
1400                         field->flags &= ~HID_MAIN_ITEM_VARIABLE;
1401                 switch (usage->hid & HID_USAGE) {
1402                 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);        break;
1403                 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);          break;
1404                 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);           break;
1405                 case 0x6b: mt_map_key_clear(KEY_F21);                   break;
1406                 case 0x6c: mt_map_key_clear(KEY_SLEEP);                 break;
1407                 default:
1408                         return -1;
1409                 }
1410                 return 1;
1411         }
1412
1413         if (rdata->is_mt_collection)
1414                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max,
1415                                               application);
1416
1417         /*
1418          * some egalax touchscreens have "application == DG_TOUCHSCREEN"
1419          * for the stylus. Overwrite the hid_input application
1420          */
1421         if (field->physical == HID_DG_STYLUS)
1422                 hi->application = HID_DG_STYLUS;
1423
1424         /* let hid-core decide for the others */
1425         return 0;
1426 }
1427
1428 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1429                 struct hid_field *field, struct hid_usage *usage,
1430                 unsigned long **bit, int *max)
1431 {
1432         struct mt_device *td = hid_get_drvdata(hdev);
1433         struct mt_report_data *rdata;
1434
1435         rdata = mt_find_report_data(td, field->report);
1436         if (rdata && rdata->is_mt_collection) {
1437                 /* We own these mappings, tell hid-input to ignore them */
1438                 return -1;
1439         }
1440
1441         /* let hid-core decide for the others */
1442         return 0;
1443 }
1444
1445 static int mt_event(struct hid_device *hid, struct hid_field *field,
1446                                 struct hid_usage *usage, __s32 value)
1447 {
1448         struct mt_device *td = hid_get_drvdata(hid);
1449         struct mt_report_data *rdata;
1450
1451         rdata = mt_find_report_data(td, field->report);
1452         if (rdata && rdata->is_mt_collection)
1453                 return mt_touch_event(hid, field, usage, value);
1454
1455         return 0;
1456 }
1457
1458 static const __u8 *mt_report_fixup(struct hid_device *hdev, __u8 *rdesc,
1459                              unsigned int *size)
1460 {
1461         if (hdev->vendor == I2C_VENDOR_ID_GOODIX &&
1462             (hdev->product == I2C_DEVICE_ID_GOODIX_01E8 ||
1463              hdev->product == I2C_DEVICE_ID_GOODIX_01E9)) {
1464                 if (rdesc[607] == 0x15) {
1465                         rdesc[607] = 0x25;
1466                         dev_info(
1467                                 &hdev->dev,
1468                                 "GT7868Q report descriptor fixup is applied.\n");
1469                 } else {
1470                         dev_info(
1471                                 &hdev->dev,
1472                                 "The byte is not expected for fixing the report descriptor. \
1473 It's possible that the touchpad firmware is not suitable for applying the fix. \
1474 got: %x\n",
1475                                 rdesc[607]);
1476                 }
1477         }
1478
1479         return rdesc;
1480 }
1481
1482 static void mt_report(struct hid_device *hid, struct hid_report *report)
1483 {
1484         struct mt_device *td = hid_get_drvdata(hid);
1485         struct hid_field *field = report->field[0];
1486         struct mt_report_data *rdata;
1487
1488         if (!(hid->claimed & HID_CLAIMED_INPUT))
1489                 return;
1490
1491         rdata = mt_find_report_data(td, report);
1492         if (rdata && rdata->is_mt_collection)
1493                 return mt_touch_report(hid, rdata);
1494
1495         if (field && field->hidinput && field->hidinput->input)
1496                 input_sync(field->hidinput->input);
1497 }
1498
1499 static bool mt_need_to_apply_feature(struct hid_device *hdev,
1500                                      struct hid_field *field,
1501                                      struct hid_usage *usage,
1502                                      enum latency_mode latency,
1503                                      enum report_mode report_mode,
1504                                      bool *inputmode_found)
1505 {
1506         struct mt_device *td = hid_get_drvdata(hdev);
1507         struct mt_class *cls = &td->mtclass;
1508         struct hid_report *report = field->report;
1509         unsigned int index = usage->usage_index;
1510         char *buf;
1511         u32 report_len;
1512         int max;
1513
1514         switch (usage->hid) {
1515         case HID_DG_INPUTMODE:
1516                 /*
1517                  * Some elan panels wrongly declare 2 input mode features,
1518                  * and silently ignore when we set the value in the second
1519                  * field. Skip the second feature and hope for the best.
1520                  */
1521                 if (*inputmode_found)
1522                         return false;
1523
1524                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1525                         report_len = hid_report_len(report);
1526                         buf = hid_alloc_report_buf(report, GFP_KERNEL);
1527                         if (!buf) {
1528                                 hid_err(hdev,
1529                                         "failed to allocate buffer for report\n");
1530                                 return false;
1531                         }
1532                         hid_hw_raw_request(hdev, report->id, buf, report_len,
1533                                            HID_FEATURE_REPORT,
1534                                            HID_REQ_GET_REPORT);
1535                         kfree(buf);
1536                 }
1537
1538                 field->value[index] = td->inputmode_value;
1539                 *inputmode_found = true;
1540                 return true;
1541
1542         case HID_DG_CONTACTMAX:
1543                 if (cls->maxcontacts) {
1544                         max = min_t(int, field->logical_maximum,
1545                                     cls->maxcontacts);
1546                         if (field->value[index] != max) {
1547                                 field->value[index] = max;
1548                                 return true;
1549                         }
1550                 }
1551                 break;
1552
1553         case HID_DG_LATENCYMODE:
1554                 field->value[index] = latency;
1555                 return true;
1556
1557         case HID_DG_SURFACESWITCH:
1558                 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_CONTACTS);
1559                 return true;
1560
1561         case HID_DG_BUTTONSWITCH:
1562                 field->value[index] = !!(report_mode & TOUCHPAD_REPORT_BUTTONS);
1563                 return true;
1564         }
1565
1566         return false; /* no need to update the report */
1567 }
1568
1569 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency,
1570                          enum report_mode report_mode)
1571 {
1572         struct hid_report_enum *rep_enum;
1573         struct hid_report *rep;
1574         struct hid_usage *usage;
1575         int i, j;
1576         bool update_report;
1577         bool inputmode_found = false;
1578
1579         rep_enum = &hdev->report_enum[HID_FEATURE_REPORT];
1580         list_for_each_entry(rep, &rep_enum->report_list, list) {
1581                 update_report = false;
1582
1583                 for (i = 0; i < rep->maxfield; i++) {
1584                         /* Ignore if report count is out of bounds. */
1585                         if (rep->field[i]->report_count < 1)
1586                                 continue;
1587
1588                         for (j = 0; j < rep->field[i]->maxusage; j++) {
1589                                 usage = &rep->field[i]->usage[j];
1590
1591                                 if (mt_need_to_apply_feature(hdev,
1592                                                              rep->field[i],
1593                                                              usage,
1594                                                              latency,
1595                                                              report_mode,
1596                                                              &inputmode_found))
1597                                         update_report = true;
1598                         }
1599                 }
1600
1601                 if (update_report)
1602                         hid_hw_request(hdev, rep, HID_REQ_SET_REPORT);
1603         }
1604 }
1605
1606 static void mt_post_parse_default_settings(struct mt_device *td,
1607                                            struct mt_application *app)
1608 {
1609         __s32 quirks = app->quirks;
1610
1611         /* unknown serial device needs special quirks */
1612         if (list_is_singular(&app->mt_usages)) {
1613                 quirks |= MT_QUIRK_ALWAYS_VALID;
1614                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1615                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1616                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1617                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1618         }
1619
1620         app->quirks = quirks;
1621 }
1622
1623 static void mt_post_parse(struct mt_device *td, struct mt_application *app)
1624 {
1625         if (!app->have_contact_count)
1626                 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1627 }
1628
1629 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1630 {
1631         struct mt_device *td = hid_get_drvdata(hdev);
1632         const char *suffix = NULL;
1633         struct mt_report_data *rdata;
1634         struct mt_application *mt_application = NULL;
1635         struct hid_report *report;
1636         int ret;
1637
1638         list_for_each_entry(report, &hi->reports, hidinput_list) {
1639                 rdata = mt_find_report_data(td, report);
1640                 if (!rdata) {
1641                         hid_err(hdev, "failed to allocate data for report\n");
1642                         return -ENOMEM;
1643                 }
1644
1645                 mt_application = rdata->application;
1646
1647                 if (rdata->is_mt_collection) {
1648                         ret = mt_touch_input_configured(hdev, hi,
1649                                                         mt_application);
1650                         if (ret)
1651                                 return ret;
1652                 }
1653         }
1654
1655         switch (hi->application) {
1656         case HID_GD_KEYBOARD:
1657         case HID_GD_KEYPAD:
1658         case HID_GD_MOUSE:
1659         case HID_DG_TOUCHPAD:
1660         case HID_GD_SYSTEM_CONTROL:
1661         case HID_CP_CONSUMER_CONTROL:
1662         case HID_GD_WIRELESS_RADIO_CTLS:
1663         case HID_GD_SYSTEM_MULTIAXIS:
1664                 /* already handled by hid core */
1665                 break;
1666         case HID_DG_TOUCHSCREEN:
1667                 /* we do not set suffix = "Touchscreen" */
1668                 hi->input->name = hdev->name;
1669                 break;
1670         case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1671                 suffix = "Custom Media Keys";
1672                 break;
1673         case HID_DG_STYLUS:
1674                 /* force BTN_STYLUS to allow tablet matching in udev */
1675                 __set_bit(BTN_STYLUS, hi->input->keybit);
1676                 break;
1677         default:
1678                 suffix = "UNKNOWN";
1679                 break;
1680         }
1681
1682         if (suffix) {
1683                 hi->input->name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
1684                                                  "%s %s", hdev->name, suffix);
1685                 if (!hi->input->name)
1686                         return -ENOMEM;
1687         }
1688
1689         return 0;
1690 }
1691
1692 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1693 {
1694         if (field->usage[0].hid != usage ||
1695             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1696                 return;
1697
1698         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1699         field->flags |= HID_MAIN_ITEM_VARIABLE;
1700 }
1701
1702 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1703 {
1704         struct hid_report *report;
1705         int i;
1706
1707         list_for_each_entry(report,
1708                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1709                             list) {
1710
1711                 if (!report->maxfield)
1712                         continue;
1713
1714                 for (i = 0; i < report->maxfield; i++)
1715                         if (report->field[i]->maxusage >= 1)
1716                                 mt_fix_const_field(report->field[i], usage);
1717         }
1718 }
1719
1720 static void mt_release_contacts(struct hid_device *hid)
1721 {
1722         struct hid_input *hidinput;
1723         struct mt_application *application;
1724         struct mt_device *td = hid_get_drvdata(hid);
1725
1726         list_for_each_entry(hidinput, &hid->inputs, list) {
1727                 struct input_dev *input_dev = hidinput->input;
1728                 struct input_mt *mt = input_dev->mt;
1729                 int i;
1730
1731                 if (mt) {
1732                         for (i = 0; i < mt->num_slots; i++) {
1733                                 input_mt_slot(input_dev, i);
1734                                 input_mt_report_slot_inactive(input_dev);
1735                         }
1736                         input_mt_sync_frame(input_dev);
1737                         input_sync(input_dev);
1738                 }
1739         }
1740
1741         list_for_each_entry(application, &td->applications, list) {
1742                 application->num_received = 0;
1743         }
1744 }
1745
1746 static void mt_expired_timeout(struct timer_list *t)
1747 {
1748         struct mt_device *td = from_timer(td, t, release_timer);
1749         struct hid_device *hdev = td->hdev;
1750
1751         /*
1752          * An input report came in just before we release the sticky fingers,
1753          * it will take care of the sticky fingers.
1754          */
1755         if (test_and_set_bit_lock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1756                 return;
1757         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1758                 mt_release_contacts(hdev);
1759         clear_bit_unlock(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1760 }
1761
1762 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1763 {
1764         int ret, i;
1765         struct mt_device *td;
1766         const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1767
1768         for (i = 0; mt_classes[i].name ; i++) {
1769                 if (id->driver_data == mt_classes[i].name) {
1770                         mtclass = &(mt_classes[i]);
1771                         break;
1772                 }
1773         }
1774
1775         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1776         if (!td) {
1777                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1778                 return -ENOMEM;
1779         }
1780         td->hdev = hdev;
1781         td->mtclass = *mtclass;
1782         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1783         hid_set_drvdata(hdev, td);
1784
1785         INIT_LIST_HEAD(&td->applications);
1786         INIT_LIST_HEAD(&td->reports);
1787
1788         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1789                 td->serial_maybe = true;
1790
1791
1792         /* Orientation is inverted if the X or Y axes are
1793          * flipped, but normalized if both are inverted.
1794          */
1795         if (hdev->quirks & (HID_QUIRK_X_INVERT | HID_QUIRK_Y_INVERT) &&
1796             !((hdev->quirks & HID_QUIRK_X_INVERT)
1797               && (hdev->quirks & HID_QUIRK_Y_INVERT)))
1798                 td->mtclass.quirks = MT_QUIRK_ORIENTATION_INVERT;
1799
1800         /* This allows the driver to correctly support devices
1801          * that emit events over several HID messages.
1802          */
1803         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1804
1805         /*
1806          * This allows the driver to handle different input sensors
1807          * that emits events through different applications on the same HID
1808          * device.
1809          */
1810         hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
1811
1812         if (id->group != HID_GROUP_MULTITOUCH_WIN_8)
1813                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1814
1815         if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) {
1816                 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP;
1817                 hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1818         }
1819
1820         timer_setup(&td->release_timer, mt_expired_timeout, 0);
1821
1822         ret = hid_parse(hdev);
1823         if (ret != 0)
1824                 return ret;
1825
1826         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1827                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1828
1829         if (hdev->vendor == USB_VENDOR_ID_SIS_TOUCH)
1830                 hdev->quirks |= HID_QUIRK_NOGET;
1831
1832         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1833         if (ret)
1834                 return ret;
1835
1836         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1837         if (ret)
1838                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1839                                 hdev->name);
1840
1841         mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1842
1843         return 0;
1844 }
1845
1846 static int mt_suspend(struct hid_device *hdev, pm_message_t state)
1847 {
1848         struct mt_device *td = hid_get_drvdata(hdev);
1849
1850         /* High latency is desirable for power savings during S3/S0ix */
1851         if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) ||
1852             !hid_hw_may_wakeup(hdev))
1853                 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE);
1854         else
1855                 mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_ALL);
1856
1857         return 0;
1858 }
1859
1860 static int mt_reset_resume(struct hid_device *hdev)
1861 {
1862         mt_release_contacts(hdev);
1863         mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1864         return 0;
1865 }
1866
1867 static int mt_resume(struct hid_device *hdev)
1868 {
1869         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1870          * It should be safe to send it to other devices too.
1871          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1872
1873         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1874
1875         mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL);
1876
1877         return 0;
1878 }
1879
1880 static void mt_remove(struct hid_device *hdev)
1881 {
1882         struct mt_device *td = hid_get_drvdata(hdev);
1883
1884         del_timer_sync(&td->release_timer);
1885
1886         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1887         hid_hw_stop(hdev);
1888 }
1889
1890 /*
1891  * This list contains only:
1892  * - VID/PID of products not working with the default multitouch handling
1893  * - 2 generic rules.
1894  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1895  */
1896 static const struct hid_device_id mt_devices[] = {
1897
1898         /* 3M panels */
1899         { .driver_data = MT_CLS_3M,
1900                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1901                         USB_DEVICE_ID_3M1968) },
1902         { .driver_data = MT_CLS_3M,
1903                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1904                         USB_DEVICE_ID_3M2256) },
1905         { .driver_data = MT_CLS_3M,
1906                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1907                         USB_DEVICE_ID_3M3266) },
1908
1909         /* Anton devices */
1910         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1911                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1912                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1913
1914         /* Asus T101HA */
1915         { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP,
1916                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1917                            USB_VENDOR_ID_ASUSTEK,
1918                            USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) },
1919
1920         /* Asus T304UA */
1921         { .driver_data = MT_CLS_ASUS,
1922                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1923                         USB_VENDOR_ID_ASUSTEK,
1924                         USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1925
1926         /* Atmel panels */
1927         { .driver_data = MT_CLS_SERIAL,
1928                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1929                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1930
1931         /* Baanto multitouch devices */
1932         { .driver_data = MT_CLS_NSMU,
1933                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1934                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1935
1936         /* Cando panels */
1937         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1938                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1939                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1940         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1941                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1942                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1943
1944         /* Chunghwa Telecom touch panels */
1945         {  .driver_data = MT_CLS_NSMU,
1946                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1947                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1948
1949         /* CJTouch panels */
1950         { .driver_data = MT_CLS_NSMU,
1951                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1952                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1953         { .driver_data = MT_CLS_NSMU,
1954                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1955                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1956
1957         /* CVTouch panels */
1958         { .driver_data = MT_CLS_NSMU,
1959                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1960                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1961
1962         /* eGalax devices (SAW) */
1963         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1964                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1965                         USB_DEVICE_ID_EGALAX_TOUCHCONTROLLER) },
1966
1967         /* eGalax devices (resistive) */
1968         { .driver_data = MT_CLS_EGALAX,
1969                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1970                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1971         { .driver_data = MT_CLS_EGALAX,
1972                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1973                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1974
1975         /* eGalax devices (capacitive) */
1976         { .driver_data = MT_CLS_EGALAX_SERIAL,
1977                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1978                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1979         { .driver_data = MT_CLS_EGALAX,
1980                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1981                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1982         { .driver_data = MT_CLS_EGALAX_SERIAL,
1983                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1984                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1985         { .driver_data = MT_CLS_EGALAX_SERIAL,
1986                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1987                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1988         { .driver_data = MT_CLS_EGALAX_SERIAL,
1989                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1990                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1991         { .driver_data = MT_CLS_EGALAX_SERIAL,
1992                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1993                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1994         { .driver_data = MT_CLS_EGALAX,
1995                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1996                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1997         { .driver_data = MT_CLS_EGALAX,
1998                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1999                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
2000         { .driver_data = MT_CLS_EGALAX_SERIAL,
2001                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2002                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
2003         { .driver_data = MT_CLS_EGALAX,
2004                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2005                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
2006         { .driver_data = MT_CLS_EGALAX,
2007                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
2008                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
2009         { .driver_data = MT_CLS_EGALAX,
2010                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2011                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
2012         { .driver_data = MT_CLS_EGALAX,
2013                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2014                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
2015         { .driver_data = MT_CLS_EGALAX_SERIAL,
2016                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2017                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
2018         { .driver_data = MT_CLS_EGALAX_SERIAL,
2019                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2020                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
2021         { .driver_data = MT_CLS_EGALAX_SERIAL,
2022                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2023                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
2024         { .driver_data = MT_CLS_EGALAX,
2025                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
2026                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) },
2027
2028         /* Elan devices */
2029         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2030                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2031                         USB_VENDOR_ID_ELAN, 0x313a) },
2032
2033         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2034                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2035                         USB_VENDOR_ID_ELAN, 0x3148) },
2036
2037         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2038                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2039                         USB_VENDOR_ID_ELAN, 0x32ae) },
2040
2041         /* Elitegroup panel */
2042         { .driver_data = MT_CLS_SERIAL,
2043                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
2044                         USB_DEVICE_ID_ELITEGROUP_05D8) },
2045
2046         /* Flatfrog Panels */
2047         { .driver_data = MT_CLS_FLATFROG,
2048                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
2049                         USB_DEVICE_ID_MULTITOUCH_3200) },
2050
2051         /* FocalTech Panels */
2052         { .driver_data = MT_CLS_SERIAL,
2053                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
2054                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
2055
2056         /* GeneralTouch panel */
2057         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2058                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2059                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
2060         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2061                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2062                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
2063         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
2064                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2065                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
2066         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2067                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2068                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
2069         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2070                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2071                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
2072         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2073                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2074                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
2075         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
2076                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
2077                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
2078
2079         /* Gametel game controller */
2080         { .driver_data = MT_CLS_NSMU,
2081                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
2082                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
2083
2084         /* Goodix GT7868Q devices */
2085         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2086           HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2087                      I2C_DEVICE_ID_GOODIX_01E8) },
2088         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2089           HID_DEVICE(BUS_I2C, HID_GROUP_ANY, I2C_VENDOR_ID_GOODIX,
2090                      I2C_DEVICE_ID_GOODIX_01E9) },
2091
2092         /* GoodTouch panels */
2093         { .driver_data = MT_CLS_NSMU,
2094                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
2095                         USB_DEVICE_ID_GOODTOUCH_000f) },
2096
2097         /* Hanvon panels */
2098         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2099                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
2100                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
2101
2102         /* HONOR GLO-GXXX panel */
2103         { .driver_data = MT_CLS_VTL,
2104                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2105                         0x347d, 0x7853) },
2106
2107         /* HONOR MagicBook Art 14 touchpad */
2108         { .driver_data = MT_CLS_VTL,
2109                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2110                         0x35cc, 0x0104) },
2111
2112         /* Ilitek dual touch panel */
2113         {  .driver_data = MT_CLS_NSMU,
2114                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
2115                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
2116
2117         /* LG Melfas panel */
2118         { .driver_data = MT_CLS_LG,
2119                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
2120                         USB_DEVICE_ID_LG_MELFAS_MT) },
2121         { .driver_data = MT_CLS_LG,
2122                 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC,
2123                         USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) },
2124
2125         /* Lenovo X1 TAB Gen 2 */
2126         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2127                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2128                            USB_VENDOR_ID_LENOVO,
2129                            USB_DEVICE_ID_LENOVO_X1_TAB) },
2130
2131         /* Lenovo X1 TAB Gen 3 */
2132         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2133                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2134                            USB_VENDOR_ID_LENOVO,
2135                            USB_DEVICE_ID_LENOVO_X1_TAB3) },
2136
2137         /* Lenovo X12 TAB Gen 1 */
2138         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2139                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2140                            USB_VENDOR_ID_LENOVO,
2141                            USB_DEVICE_ID_LENOVO_X12_TAB) },
2142
2143         /* Lenovo X12 TAB Gen 2 */
2144         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2145                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2146                            USB_VENDOR_ID_LENOVO,
2147                            USB_DEVICE_ID_LENOVO_X12_TAB2) },
2148
2149         /* Logitech devices */
2150         { .driver_data = MT_CLS_NSMU,
2151                 HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH_WIN_8,
2152                         USB_VENDOR_ID_LOGITECH,
2153                         USB_DEVICE_ID_LOGITECH_CASA_TOUCHPAD) },
2154         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT_NSMU,
2155                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
2156                         USB_VENDOR_ID_LOGITECH,
2157                         USB_DEVICE_ID_LOGITECH_BOLT_RECEIVER) },
2158
2159         /* MosArt panels */
2160         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2161                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2162                         USB_DEVICE_ID_ASUS_T91MT)},
2163         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2164                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
2165                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
2166         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
2167                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
2168                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
2169
2170         /* Novatek Panel */
2171         { .driver_data = MT_CLS_NSMU,
2172                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
2173                         USB_DEVICE_ID_NOVATEK_PCT) },
2174
2175         /* Ntrig Panel */
2176         { .driver_data = MT_CLS_NSMU,
2177                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2178                         USB_VENDOR_ID_NTRIG, 0x1b05) },
2179
2180         /* Panasonic panels */
2181         { .driver_data = MT_CLS_PANASONIC,
2182                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2183                         USB_DEVICE_ID_PANABOARD_UBT780) },
2184         { .driver_data = MT_CLS_PANASONIC,
2185                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
2186                         USB_DEVICE_ID_PANABOARD_UBT880) },
2187
2188         /* PixArt optical touch screen */
2189         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2190                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2191                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
2192         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2193                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2194                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
2195         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
2196                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
2197                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
2198
2199         /* PixCir-based panels */
2200         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
2201                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
2202                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
2203
2204         /* Quanta-based panels */
2205         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
2206                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
2207                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
2208
2209         /* Razer touchpads */
2210         { .driver_data = MT_CLS_RAZER_BLADE_STEALTH,
2211                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2212                         USB_VENDOR_ID_SYNAPTICS, 0x8323) },
2213
2214         /* Smart Tech panels */
2215         { .driver_data = MT_CLS_SMART_TECH,
2216                 MT_USB_DEVICE(0x0b8c, 0x0092)},
2217
2218         /* Stantum panels */
2219         { .driver_data = MT_CLS_CONFIDENCE,
2220                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
2221                         USB_DEVICE_ID_MTP_STM)},
2222
2223         /* Synaptics devices */
2224         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2225                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2226                         USB_VENDOR_ID_SYNAPTICS, 0xcd7e) },
2227
2228         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2229                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2230                         USB_VENDOR_ID_SYNAPTICS, 0xcddc) },
2231
2232         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2233                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2234                         USB_VENDOR_ID_SYNAPTICS, 0xce08) },
2235
2236         { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT,
2237                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2238                         USB_VENDOR_ID_SYNAPTICS, 0xce09) },
2239
2240         /* TopSeed panels */
2241         { .driver_data = MT_CLS_TOPSEED,
2242                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
2243                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
2244
2245         /* Touch International panels */
2246         { .driver_data = MT_CLS_NSMU,
2247                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
2248                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
2249
2250         /* Unitec panels */
2251         { .driver_data = MT_CLS_NSMU,
2252                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2253                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
2254         { .driver_data = MT_CLS_NSMU,
2255                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
2256                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
2257
2258         /* VTL panels */
2259         { .driver_data = MT_CLS_VTL,
2260                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
2261                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
2262
2263         /* Winbond Electronics Corp. */
2264         { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS,
2265                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2266                            USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) },
2267
2268         /* Wistron panels */
2269         { .driver_data = MT_CLS_NSMU,
2270                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
2271                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
2272
2273         /* XAT */
2274         { .driver_data = MT_CLS_NSMU,
2275                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
2276                         USB_DEVICE_ID_XAT_CSR) },
2277
2278         /* Xiroku */
2279         { .driver_data = MT_CLS_NSMU,
2280                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2281                         USB_DEVICE_ID_XIROKU_SPX) },
2282         { .driver_data = MT_CLS_NSMU,
2283                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2284                         USB_DEVICE_ID_XIROKU_MPX) },
2285         { .driver_data = MT_CLS_NSMU,
2286                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2287                         USB_DEVICE_ID_XIROKU_CSR) },
2288         { .driver_data = MT_CLS_NSMU,
2289                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2290                         USB_DEVICE_ID_XIROKU_SPX1) },
2291         { .driver_data = MT_CLS_NSMU,
2292                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2293                         USB_DEVICE_ID_XIROKU_MPX1) },
2294         { .driver_data = MT_CLS_NSMU,
2295                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2296                         USB_DEVICE_ID_XIROKU_CSR1) },
2297         { .driver_data = MT_CLS_NSMU,
2298                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2299                         USB_DEVICE_ID_XIROKU_SPX2) },
2300         { .driver_data = MT_CLS_NSMU,
2301                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2302                         USB_DEVICE_ID_XIROKU_MPX2) },
2303         { .driver_data = MT_CLS_NSMU,
2304                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
2305                         USB_DEVICE_ID_XIROKU_CSR2) },
2306
2307         /* Google MT devices */
2308         { .driver_data = MT_CLS_GOOGLE,
2309                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
2310                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
2311         { .driver_data = MT_CLS_GOOGLE,
2312                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_GOOGLE,
2313                         USB_DEVICE_ID_GOOGLE_WHISKERS) },
2314
2315         /* sis */
2316         { .driver_data = MT_CLS_SIS,
2317                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_SIS_TOUCH,
2318                         HID_ANY_ID) },
2319
2320         /* Hantick */
2321         { .driver_data = MT_CLS_NSMU,
2322                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
2323                            I2C_VENDOR_ID_HANTICK, I2C_PRODUCT_ID_HANTICK_5288) },
2324
2325         /* Generic MT device */
2326         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
2327
2328         /* Generic Win 8 certified MT device */
2329         {  .driver_data = MT_CLS_WIN_8,
2330                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
2331                         HID_ANY_ID, HID_ANY_ID) },
2332         { }
2333 };
2334 MODULE_DEVICE_TABLE(hid, mt_devices);
2335
2336 static const struct hid_usage_id mt_grabbed_usages[] = {
2337         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
2338         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
2339 };
2340
2341 static struct hid_driver mt_driver = {
2342         .name = "hid-multitouch",
2343         .id_table = mt_devices,
2344         .probe = mt_probe,
2345         .remove = mt_remove,
2346         .input_mapping = mt_input_mapping,
2347         .input_mapped = mt_input_mapped,
2348         .input_configured = mt_input_configured,
2349         .feature_mapping = mt_feature_mapping,
2350         .usage_table = mt_grabbed_usages,
2351         .event = mt_event,
2352         .report_fixup = mt_report_fixup,
2353         .report = mt_report,
2354         .suspend = pm_ptr(mt_suspend),
2355         .reset_resume = pm_ptr(mt_reset_resume),
2356         .resume = pm_ptr(mt_resume),
2357 };
2358 module_hid_driver(mt_driver);