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