drivers/hid/hid-multitouch.c

   1 /*
   2  *  HID driver for multitouch panels
   3  *
   4  *  Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr>
   5  *  Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   6  *  Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France
   7  *  Copyright (c) 2012-2013 Red Hat, Inc
   8  *
   9  *  This code is partly based on hid-egalax.c:
  10  *
  11  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  12  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  13  *  Copyright (c) 2010 Canonical, Ltd.
  14  *
  15  *  This code is partly based on hid-3m-pct.c:
  16  *
  17  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  18  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  19  *  Copyright (c) 2010      Canonical, Ltd.
  20  *
  21  */
  22
  23 /*
  24  * This program is free software; you can redistribute it and/or modify it
  25  * under the terms of the GNU General Public License as published by the Free
  26  * Software Foundation; either version 2 of the License, or (at your option)
  27  * any later version.
  28  */
  29
  30 /*
  31  * This driver is regularly tested thanks to the tool hid-test[1].
  32  * This tool relies on hid-replay[2] and a database of hid devices[3].
  33  * Please run these regression tests before patching this module so that
  34  * your patch won't break existing known devices.
  35  *
  36  * [1] https://github.com/bentiss/hid-test
  37  * [2] https://github.com/bentiss/hid-replay
  38  * [3] https://github.com/bentiss/hid-devices
  39  */
  40
  41 #include <linux/device.h>
  42 #include <linux/hid.h>
  43 #include <linux/module.h>
  44 #include <linux/slab.h>
  45 #include <linux/input/mt.h>
  46 #include <linux/jiffies.h>
  47 #include <linux/string.h>
  48 #include <linux/timer.h>
  49
  50
  51 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  52 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  53 MODULE_DESCRIPTION("HID multitouch panels");
  54 MODULE_LICENSE("GPL");
  55
  56 #include "hid-ids.h"
  57
  58 /* quirks to control the device */
  59 #define MT_QUIRK_NOT_SEEN_MEANS_UP      BIT(0)
  60 #define MT_QUIRK_SLOT_IS_CONTACTID      BIT(1)
  61 #define MT_QUIRK_CYPRESS                BIT(2)
  62 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  BIT(3)
  63 #define MT_QUIRK_ALWAYS_VALID           BIT(4)
  64 #define MT_QUIRK_VALID_IS_INRANGE       BIT(5)
  65 #define MT_QUIRK_VALID_IS_CONFIDENCE    BIT(6)
  66 #define MT_QUIRK_CONFIDENCE             BIT(7)
  67 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    BIT(8)
  68 #define MT_QUIRK_NO_AREA                BIT(9)
  69 #define MT_QUIRK_IGNORE_DUPLICATES      BIT(10)
  70 #define MT_QUIRK_HOVERING               BIT(11)
  71 #define MT_QUIRK_CONTACT_CNT_ACCURATE   BIT(12)
  72 #define MT_QUIRK_FORCE_GET_FEATURE      BIT(13)
  73 #define MT_QUIRK_FIX_CONST_CONTACT_ID   BIT(14)
  74 #define MT_QUIRK_TOUCH_SIZE_SCALING     BIT(15)
  75 #define MT_QUIRK_STICKY_FINGERS         BIT(16)
  76 #define MT_QUIRK_ASUS_CUSTOM_UP         BIT(17)
  77
  78 #define MT_INPUTMODE_TOUCHSCREEN        0x02
  79 #define MT_INPUTMODE_TOUCHPAD           0x03
  80
  81 #define MT_BUTTONTYPE_CLICKPAD          0
  82
  83 #define MT_IO_FLAGS_RUNNING             0
  84 #define MT_IO_FLAGS_ACTIVE_SLOTS        1
  85 #define MT_IO_FLAGS_PENDING_SLOTS       2
  86
  87 struct mt_slot {
  88         __s32 x, y, cx, cy, p, w, h;
  89         __s32 contactid;        /* the device ContactID assigned to this slot */
  90         bool touch_state;       /* is the touch valid? */
  91         bool inrange_state;     /* is the finger in proximity of the sensor? */
  92         bool confidence_state;  /* is the touch made by a finger? */
  93 };
  94
  95 struct mt_class {
  96         __s32 name;     /* MT_CLS */
  97         __s32 quirks;
  98         __s32 sn_move;  /* Signal/noise ratio for move events */
  99         __s32 sn_width; /* Signal/noise ratio for width events */
 100         __s32 sn_height;        /* Signal/noise ratio for height events */
 101         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
 102         __u8 maxcontacts;
 103         bool is_indirect;       /* true for touchpads */
 104         bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */
 105 };
 106
 107 struct mt_fields {
 108         unsigned usages[HID_MAX_FIELDS];
 109         unsigned int length;
 110 };
 111
 112 struct mt_device {
 113         struct mt_slot curdata; /* placeholder of incoming data */
 114         struct mt_class mtclass;        /* our mt device class */
 115         struct timer_list release_timer;        /* to release sticky fingers */
 116         struct mt_fields *fields;       /* temporary placeholder for storing the
 117                                            multitouch fields */
 118         unsigned long mt_io_flags;      /* mt flags (MT_IO_FLAGS_*) */
 119         int cc_index;   /* contact count field index in the report */
 120         int cc_value_index;     /* contact count value index in the field */
 121         unsigned last_slot_field;       /* the last field of a slot */
 122         unsigned mt_report_id;  /* the report ID of the multitouch device */
 123         unsigned long initial_quirks;   /* initial quirks state */
 124         __s16 inputmode;        /* InputMode HID feature, -1 if non-existent */
 125         __s16 inputmode_index;  /* InputMode HID feature index in the report */
 126         __s16 maxcontact_report_id;     /* Maximum Contact Number HID feature,
 127                                    -1 if non-existent */
 128         __u8 inputmode_value;  /* InputMode HID feature value */
 129         __u8 num_received;      /* how many contacts we received */
 130         __u8 num_expected;      /* expected last contact index */
 131         __u8 maxcontacts;
 132         __u8 touches_by_report; /* how many touches are present in one report:
 133                                 * 1 means we should use a serial protocol
 134                                 * > 1 means hybrid (multitouch) protocol */
 135         __u8 buttons_count;     /* number of physical buttons per touchpad */
 136         bool is_buttonpad;      /* is this device a button pad? */
 137         bool serial_maybe;      /* need to check for serial protocol */
 138         bool curvalid;          /* is the current contact valid? */
 139         unsigned mt_flags;      /* flags to pass to input-mt */
 140         __s32 dev_time;         /* the scan time provided by the device */
 141         unsigned long jiffies;  /* the frame's jiffies */
 142         int timestamp;          /* the timestamp to be sent */
 143 };
 144
 145 static void mt_post_parse_default_settings(struct mt_device *td);
 146 static void mt_post_parse(struct mt_device *td);
 147
 148 /* classes of device behavior */
 149 #define MT_CLS_DEFAULT                          0x0001
 150
 151 #define MT_CLS_SERIAL                           0x0002
 152 #define MT_CLS_CONFIDENCE                       0x0003
 153 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
 154 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
 155 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
 156 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
 157 /* reserved                                     0x0008 */
 158 #define MT_CLS_INRANGE_CONTACTNUMBER            0x0009
 159 #define MT_CLS_NSMU                             0x000a
 160 /* reserved                                     0x0010 */
 161 /* reserved                                     0x0011 */
 162 #define MT_CLS_WIN_8                            0x0012
 163 #define MT_CLS_EXPORT_ALL_INPUTS                0x0013
 164 #define MT_CLS_WIN_8_DUAL                       0x0014
 165
 166 /* vendor specific classes */
 167 #define MT_CLS_3M                               0x0101
 168 /* reserved                                     0x0102 */
 169 #define MT_CLS_EGALAX                           0x0103
 170 #define MT_CLS_EGALAX_SERIAL                    0x0104
 171 #define MT_CLS_TOPSEED                          0x0105
 172 #define MT_CLS_PANASONIC                        0x0106
 173 #define MT_CLS_FLATFROG                         0x0107
 174 #define MT_CLS_GENERALTOUCH_TWOFINGERS          0x0108
 175 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS      0x0109
 176 #define MT_CLS_LG                               0x010a
 177 #define MT_CLS_ASUS                             0x010b
 178 #define MT_CLS_VTL                              0x0110
 179 #define MT_CLS_GOOGLE                           0x0111
 180
 181 #define MT_DEFAULT_MAXCONTACT   10
 182 #define MT_MAX_MAXCONTACT       250
 183
 184 /*
 185  * Resync device and local timestamps after that many microseconds without
 186  * receiving data.
 187  */
 188 #define MAX_TIMESTAMP_INTERVAL  1000000
 189
 190 #define MT_USB_DEVICE(v, p)     HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p)
 191 #define MT_BT_DEVICE(v, p)      HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p)
 192
 193 /*
 194  * these device-dependent functions determine what slot corresponds
 195  * to a valid contact that was just read.
 196  */
 197
 198 static int cypress_compute_slot(struct mt_device *td)
 199 {
 200         if (td->curdata.contactid != 0 || td->num_received == 0)
 201                 return td->curdata.contactid;
 202         else
 203                 return -1;
 204 }
 205
 206 static struct mt_class mt_classes[] = {
 207         { .name = MT_CLS_DEFAULT,
 208                 .quirks = MT_QUIRK_ALWAYS_VALID |
 209                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 210         { .name = MT_CLS_NSMU,
 211                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 212         { .name = MT_CLS_SERIAL,
 213                 .quirks = MT_QUIRK_ALWAYS_VALID},
 214         { .name = MT_CLS_CONFIDENCE,
 215                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 216         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 217                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 218                         MT_QUIRK_SLOT_IS_CONTACTID },
 219         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 220                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 221                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 222         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 223                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 224                         MT_QUIRK_SLOT_IS_CONTACTID,
 225                 .maxcontacts = 2 },
 226         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 227                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 228                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 229                 .maxcontacts = 2 },
 230         { .name = MT_CLS_INRANGE_CONTACTNUMBER,
 231                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 232                         MT_QUIRK_SLOT_IS_CONTACTNUMBER },
 233         { .name = MT_CLS_WIN_8,
 234                 .quirks = MT_QUIRK_ALWAYS_VALID |
 235                         MT_QUIRK_IGNORE_DUPLICATES |
 236                         MT_QUIRK_HOVERING |
 237                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 238                         MT_QUIRK_STICKY_FINGERS },
 239         { .name = MT_CLS_EXPORT_ALL_INPUTS,
 240                 .quirks = MT_QUIRK_ALWAYS_VALID |
 241                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 242                 .export_all_inputs = true },
 243         { .name = MT_CLS_WIN_8_DUAL,
 244                 .quirks = MT_QUIRK_ALWAYS_VALID |
 245                         MT_QUIRK_IGNORE_DUPLICATES |
 246                         MT_QUIRK_HOVERING |
 247                         MT_QUIRK_CONTACT_CNT_ACCURATE,
 248                 .export_all_inputs = true },
 249
 250         /*
 251          * vendor specific classes
 252          */
 253         { .name = MT_CLS_3M,
 254                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 255                         MT_QUIRK_SLOT_IS_CONTACTID |
 256                         MT_QUIRK_TOUCH_SIZE_SCALING,
 257                 .sn_move = 2048,
 258                 .sn_width = 128,
 259                 .sn_height = 128,
 260                 .maxcontacts = 60,
 261         },
 262         { .name = MT_CLS_EGALAX,
 263                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 264                         MT_QUIRK_VALID_IS_INRANGE,
 265                 .sn_move = 4096,
 266                 .sn_pressure = 32,
 267         },
 268         { .name = MT_CLS_EGALAX_SERIAL,
 269                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 270                         MT_QUIRK_ALWAYS_VALID,
 271                 .sn_move = 4096,
 272                 .sn_pressure = 32,
 273         },
 274         { .name = MT_CLS_TOPSEED,
 275                 .quirks = MT_QUIRK_ALWAYS_VALID,
 276                 .is_indirect = true,
 277                 .maxcontacts = 2,
 278         },
 279         { .name = MT_CLS_PANASONIC,
 280                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP,
 281                 .maxcontacts = 4 },
 282         { .name = MT_CLS_GENERALTOUCH_TWOFINGERS,
 283                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 284                         MT_QUIRK_VALID_IS_INRANGE |
 285                         MT_QUIRK_SLOT_IS_CONTACTID,
 286                 .maxcontacts = 2
 287         },
 288         { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
 289                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 290                         MT_QUIRK_SLOT_IS_CONTACTID
 291         },
 292
 293         { .name = MT_CLS_FLATFROG,
 294                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 295                         MT_QUIRK_NO_AREA,
 296                 .sn_move = 2048,
 297                 .maxcontacts = 40,
 298         },
 299         { .name = MT_CLS_LG,
 300                 .quirks = MT_QUIRK_ALWAYS_VALID |
 301                         MT_QUIRK_FIX_CONST_CONTACT_ID |
 302                         MT_QUIRK_IGNORE_DUPLICATES |
 303                         MT_QUIRK_HOVERING |
 304                         MT_QUIRK_CONTACT_CNT_ACCURATE },
 305         { .name = MT_CLS_ASUS,
 306                 .quirks = MT_QUIRK_ALWAYS_VALID |
 307                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 308                         MT_QUIRK_ASUS_CUSTOM_UP },
 309         { .name = MT_CLS_VTL,
 310                 .quirks = MT_QUIRK_ALWAYS_VALID |
 311                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 312                         MT_QUIRK_FORCE_GET_FEATURE,
 313         },
 314         { .name = MT_CLS_GOOGLE,
 315                 .quirks = MT_QUIRK_ALWAYS_VALID |
 316                         MT_QUIRK_CONTACT_CNT_ACCURATE |
 317                         MT_QUIRK_SLOT_IS_CONTACTID |
 318                         MT_QUIRK_HOVERING
 319         },
 320         { }
 321 };
 322
 323 static ssize_t mt_show_quirks(struct device *dev,
 324                            struct device_attribute *attr,
 325                            char *buf)
 326 {
 327         struct hid_device *hdev = to_hid_device(dev);
 328         struct mt_device *td = hid_get_drvdata(hdev);
 329
 330         return sprintf(buf, "%u\n", td->mtclass.quirks);
 331 }
 332
 333 static ssize_t mt_set_quirks(struct device *dev,
 334                           struct device_attribute *attr,
 335                           const char *buf, size_t count)
 336 {
 337         struct hid_device *hdev = to_hid_device(dev);
 338         struct mt_device *td = hid_get_drvdata(hdev);
 339
 340         unsigned long val;
 341
 342         if (kstrtoul(buf, 0, &val))
 343                 return -EINVAL;
 344
 345         td->mtclass.quirks = val;
 346
 347         if (td->cc_index < 0)
 348                 td->mtclass.quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
 349
 350         return count;
 351 }
 352
 353 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 354
 355 static struct attribute *sysfs_attrs[] = {
 356         &dev_attr_quirks.attr,
 357         NULL
 358 };
 359
 360 static const struct attribute_group mt_attribute_group = {
 361         .attrs = sysfs_attrs
 362 };
 363
 364 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report)
 365 {
 366         struct mt_device *td = hid_get_drvdata(hdev);
 367         int ret, size = hid_report_len(report);
 368         u8 *buf;
 369
 370         /*
 371          * Do not fetch the feature report if the device has been explicitly
 372          * marked as non-capable.
 373          */
 374         if (td->initial_quirks & HID_QUIRK_NO_INIT_REPORTS)
 375                 return;
 376
 377         buf = hid_alloc_report_buf(report, GFP_KERNEL);
 378         if (!buf)
 379                 return;
 380
 381         ret = hid_hw_raw_request(hdev, report->id, buf, size,
 382                                  HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
 383         if (ret < 0) {
 384                 dev_warn(&hdev->dev, "failed to fetch feature %d\n",
 385                          report->id);
 386         } else {
 387                 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf,
 388                                            size, 0);
 389                 if (ret)
 390                         dev_warn(&hdev->dev, "failed to report feature\n");
 391         }
 392
 393         kfree(buf);
 394 }
 395
 396 static void mt_feature_mapping(struct hid_device *hdev,
 397                 struct hid_field *field, struct hid_usage *usage)
 398 {
 399         struct mt_device *td = hid_get_drvdata(hdev);
 400
 401         switch (usage->hid) {
 402         case HID_DG_INPUTMODE:
 403                 /* Ignore if value index is out of bounds. */
 404                 if (usage->usage_index >= field->report_count) {
 405                         dev_err(&hdev->dev, "HID_DG_INPUTMODE out of range\n");
 406                         break;
 407                 }
 408
 409                 if (td->inputmode < 0) {
 410                         td->inputmode = field->report->id;
 411                         td->inputmode_index = usage->usage_index;
 412                 } else {
 413                         /*
 414                          * Some elan panels wrongly declare 2 input mode
 415                          * features, and silently ignore when we set the
 416                          * value in the second field. Skip the second feature
 417                          * and hope for the best.
 418                          */
 419                         dev_info(&hdev->dev,
 420                                  "Ignoring the extra HID_DG_INPUTMODE\n");
 421                 }
 422
 423                 break;
 424         case HID_DG_CONTACTMAX:
 425                 mt_get_feature(hdev, field->report);
 426
 427                 td->maxcontact_report_id = field->report->id;
 428                 td->maxcontacts = field->value[0];
 429                 if (!td->maxcontacts &&
 430                     field->logical_maximum <= MT_MAX_MAXCONTACT)
 431                         td->maxcontacts = field->logical_maximum;
 432                 if (td->mtclass.maxcontacts)
 433                         /* check if the maxcontacts is given by the class */
 434                         td->maxcontacts = td->mtclass.maxcontacts;
 435
 436                 break;
 437         case HID_DG_BUTTONTYPE:
 438                 if (usage->usage_index >= field->report_count) {
 439                         dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n");
 440                         break;
 441                 }
 442
 443                 mt_get_feature(hdev, field->report);
 444                 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD)
 445                         td->is_buttonpad = true;
 446
 447                 break;
 448         case 0xff0000c5:
 449                 /* Retrieve the Win8 blob once to enable some devices */
 450                 if (usage->usage_index == 0)
 451                         mt_get_feature(hdev, field->report);
 452                 break;
 453         }
 454 }
 455
 456 static void set_abs(struct input_dev *input, unsigned int code,
 457                 struct hid_field *field, int snratio)
 458 {
 459         int fmin = field->logical_minimum;
 460         int fmax = field->logical_maximum;
 461         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 462         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 463         input_abs_set_res(input, code, hidinput_calc_abs_res(field, code));
 464 }
 465
 466 static void mt_store_field(struct hid_usage *usage, struct mt_device *td,
 467                 struct hid_input *hi)
 468 {
 469         struct mt_fields *f = td->fields;
 470
 471         if (f->length >= HID_MAX_FIELDS)
 472                 return;
 473
 474         f->usages[f->length++] = usage->hid;
 475 }
 476
 477 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 478                 struct hid_field *field, struct hid_usage *usage,
 479                 unsigned long **bit, int *max)
 480 {
 481         struct mt_device *td = hid_get_drvdata(hdev);
 482         struct mt_class *cls = &td->mtclass;
 483         int code;
 484         struct hid_usage *prev_usage = NULL;
 485
 486         if (field->application == HID_DG_TOUCHSCREEN)
 487                 td->mt_flags |= INPUT_MT_DIRECT;
 488
 489         /*
 490          * Model touchscreens providing buttons as touchpads.
 491          */
 492         if (field->application == HID_DG_TOUCHPAD ||
 493             (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) {
 494                 td->mt_flags |= INPUT_MT_POINTER;
 495                 td->inputmode_value = MT_INPUTMODE_TOUCHPAD;
 496         }
 497
 498         /* count the buttons on touchpads */
 499         if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
 500                 td->buttons_count++;
 501
 502         if (usage->usage_index)
 503                 prev_usage = &field->usage[usage->usage_index - 1];
 504
 505         switch (usage->hid & HID_USAGE_PAGE) {
 506
 507         case HID_UP_GENDESK:
 508                 switch (usage->hid) {
 509                 case HID_GD_X:
 510                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 511                                 hid_map_usage(hi, usage, bit, max,
 512                                         EV_ABS, ABS_MT_TOOL_X);
 513                                 set_abs(hi->input, ABS_MT_TOOL_X, field,
 514                                         cls->sn_move);
 515                         } else {
 516                                 hid_map_usage(hi, usage, bit, max,
 517                                         EV_ABS, ABS_MT_POSITION_X);
 518                                 set_abs(hi->input, ABS_MT_POSITION_X, field,
 519                                         cls->sn_move);
 520                         }
 521
 522                         mt_store_field(usage, td, hi);
 523                         return 1;
 524                 case HID_GD_Y:
 525                         if (prev_usage && (prev_usage->hid == usage->hid)) {
 526                                 hid_map_usage(hi, usage, bit, max,
 527                                         EV_ABS, ABS_MT_TOOL_Y);
 528                                 set_abs(hi->input, ABS_MT_TOOL_Y, field,
 529                                         cls->sn_move);
 530                         } else {
 531                                 hid_map_usage(hi, usage, bit, max,
 532                                         EV_ABS, ABS_MT_POSITION_Y);
 533                                 set_abs(hi->input, ABS_MT_POSITION_Y, field,
 534                                         cls->sn_move);
 535                         }
 536
 537                         mt_store_field(usage, td, hi);
 538                         return 1;
 539                 }
 540                 return 0;
 541
 542         case HID_UP_DIGITIZER:
 543                 switch (usage->hid) {
 544                 case HID_DG_INRANGE:
 545                         if (cls->quirks & MT_QUIRK_HOVERING) {
 546                                 hid_map_usage(hi, usage, bit, max,
 547                                         EV_ABS, ABS_MT_DISTANCE);
 548                                 input_set_abs_params(hi->input,
 549                                         ABS_MT_DISTANCE, 0, 1, 0, 0);
 550                         }
 551                         mt_store_field(usage, td, hi);
 552                         return 1;
 553                 case HID_DG_CONFIDENCE:
 554                         if ((cls->name == MT_CLS_WIN_8 ||
 555                                 cls->name == MT_CLS_WIN_8_DUAL) &&
 556                                 field->application == HID_DG_TOUCHPAD)
 557                                 cls->quirks |= MT_QUIRK_CONFIDENCE;
 558                         mt_store_field(usage, td, hi);
 559                         return 1;
 560                 case HID_DG_TIPSWITCH:
 561                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 562                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 563                         mt_store_field(usage, td, hi);
 564                         return 1;
 565                 case HID_DG_CONTACTID:
 566                         mt_store_field(usage, td, hi);
 567                         td->touches_by_report++;
 568                         td->mt_report_id = field->report->id;
 569                         return 1;
 570                 case HID_DG_WIDTH:
 571                         hid_map_usage(hi, usage, bit, max,
 572                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 573                         if (!(cls->quirks & MT_QUIRK_NO_AREA))
 574                                 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 575                                         cls->sn_width);
 576                         mt_store_field(usage, td, hi);
 577                         return 1;
 578                 case HID_DG_HEIGHT:
 579                         hid_map_usage(hi, usage, bit, max,
 580                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 581                         if (!(cls->quirks & MT_QUIRK_NO_AREA)) {
 582                                 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 583                                         cls->sn_height);
 584                                 input_set_abs_params(hi->input,
 585                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 586                         }
 587                         mt_store_field(usage, td, hi);
 588                         return 1;
 589                 case HID_DG_TIPPRESSURE:
 590                         hid_map_usage(hi, usage, bit, max,
 591                                         EV_ABS, ABS_MT_PRESSURE);
 592                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 593                                 cls->sn_pressure);
 594                         mt_store_field(usage, td, hi);
 595                         return 1;
 596                 case HID_DG_SCANTIME:
 597                         hid_map_usage(hi, usage, bit, max,
 598                                 EV_MSC, MSC_TIMESTAMP);
 599                         input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP);
 600                         mt_store_field(usage, td, hi);
 601                         return 1;
 602                 case HID_DG_CONTACTCOUNT:
 603                         /* Ignore if indexes are out of bounds. */
 604                         if (field->index >= field->report->maxfield ||
 605                             usage->usage_index >= field->report_count)
 606                                 return 1;
 607                         td->cc_index = field->index;
 608                         td->cc_value_index = usage->usage_index;
 609                         return 1;
 610                 case HID_DG_CONTACTMAX:
 611                         /* we don't set td->last_slot_field as contactcount and
 612                          * contact max are global to the report */
 613                         return -1;
 614                 case HID_DG_TOUCH:
 615                         /* Legacy devices use TIPSWITCH and not TOUCH.
 616                          * Let's just ignore this field. */
 617                         return -1;
 618                 }
 619                 /* let hid-input decide for the others */
 620                 return 0;
 621
 622         case HID_UP_BUTTON:
 623                 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE);
 624                 /*
 625                  * MS PTP spec says that external buttons left and right have
 626                  * usages 2 and 3.
 627                  */
 628                 if ((cls->name == MT_CLS_WIN_8 ||
 629                         cls->name == MT_CLS_WIN_8_DUAL) &&
 630                     field->application == HID_DG_TOUCHPAD &&
 631                     (usage->hid & HID_USAGE) > 1)
 632                         code--;
 633                 hid_map_usage(hi, usage, bit, max, EV_KEY, code);
 634                 input_set_capability(hi->input, EV_KEY, code);
 635                 return 1;
 636
 637         case 0xff000000:
 638                 /* we do not want to map these: no input-oriented meaning */
 639                 return -1;
 640         }
 641
 642         return 0;
 643 }
 644
 645 static int mt_compute_slot(struct mt_device *td, struct input_dev *input)
 646 {
 647         __s32 quirks = td->mtclass.quirks;
 648
 649         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 650                 return td->curdata.contactid;
 651
 652         if (quirks & MT_QUIRK_CYPRESS)
 653                 return cypress_compute_slot(td);
 654
 655         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 656                 return td->num_received;
 657
 658         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 659                 return td->curdata.contactid - 1;
 660
 661         return input_mt_get_slot_by_key(input, td->curdata.contactid);
 662 }
 663
 664 /*
 665  * this function is called when a whole contact has been processed,
 666  * so that it can assign it to a slot and store the data there
 667  */
 668 static void mt_complete_slot(struct mt_device *td, struct input_dev *input)
 669 {
 670         if ((td->mtclass.quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) &&
 671             td->num_received >= td->num_expected)
 672                 return;
 673
 674         if (td->curvalid || (td->mtclass.quirks & MT_QUIRK_ALWAYS_VALID)) {
 675                 int active;
 676                 int slotnum = mt_compute_slot(td, input);
 677                 struct mt_slot *s = &td->curdata;
 678                 struct input_mt *mt = input->mt;
 679
 680                 if (slotnum < 0 || slotnum >= td->maxcontacts)
 681                         return;
 682
 683                 if ((td->mtclass.quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) {
 684                         struct input_mt_slot *slot = &mt->slots[slotnum];
 685                         if (input_mt_is_active(slot) &&
 686                             input_mt_is_used(mt, slot))
 687                                 return;
 688                 }
 689
 690                 if (!(td->mtclass.quirks & MT_QUIRK_CONFIDENCE))
 691                         s->confidence_state = 1;
 692                 active = (s->touch_state || s->inrange_state) &&
 693                                                         s->confidence_state;
 694
 695                 input_mt_slot(input, slotnum);
 696                 input_mt_report_slot_state(input, MT_TOOL_FINGER, active);
 697                 if (active) {
 698                         /* this finger is in proximity of the sensor */
 699                         int wide = (s->w > s->h);
 700                         int major = max(s->w, s->h);
 701                         int minor = min(s->w, s->h);
 702
 703                         /*
 704                          * divided by two to match visual scale of touch
 705                          * for devices with this quirk
 706                          */
 707                         if (td->mtclass.quirks & MT_QUIRK_TOUCH_SIZE_SCALING) {
 708                                 major = major >> 1;
 709                                 minor = minor >> 1;
 710                         }
 711
 712                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 713                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 714                         input_event(input, EV_ABS, ABS_MT_TOOL_X, s->cx);
 715                         input_event(input, EV_ABS, ABS_MT_TOOL_Y, s->cy);
 716                         input_event(input, EV_ABS, ABS_MT_DISTANCE,
 717                                 !s->touch_state);
 718                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 719                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 720                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 721                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 722
 723                         set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 724                 }
 725         }
 726
 727         td->num_received++;
 728 }
 729
 730 /*
 731  * this function is called when a whole packet has been received and processed,
 732  * so that it can decide what to send to the input layer.
 733  */
 734 static void mt_sync_frame(struct mt_device *td, struct input_dev *input)
 735 {
 736         input_mt_sync_frame(input);
 737         input_event(input, EV_MSC, MSC_TIMESTAMP, td->timestamp);
 738         input_sync(input);
 739         td->num_received = 0;
 740         if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags))
 741                 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 742         else
 743                 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags);
 744         clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags);
 745 }
 746
 747 static int mt_compute_timestamp(struct mt_device *td, struct hid_field *field,
 748                 __s32 value)
 749 {
 750         long delta = value - td->dev_time;
 751         unsigned long jdelta = jiffies_to_usecs(jiffies - td->jiffies);
 752
 753         td->jiffies = jiffies;
 754         td->dev_time = value;
 755
 756         if (delta < 0)
 757                 delta += field->logical_maximum;
 758
 759         /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */
 760         delta *= 100;
 761
 762         if (jdelta > MAX_TIMESTAMP_INTERVAL)
 763                 /* No data received for a while, resync the timestamp. */
 764                 return 0;
 765         else
 766                 return td->timestamp + delta;
 767 }
 768
 769 static int mt_touch_event(struct hid_device *hid, struct hid_field *field,
 770                                 struct hid_usage *usage, __s32 value)
 771 {
 772         /* we will handle the hidinput part later, now remains hiddev */
 773         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 774                 hid->hiddev_hid_event(hid, field, usage, value);
 775
 776         return 1;
 777 }
 778
 779 static void mt_process_mt_event(struct hid_device *hid, struct hid_field *field,
 780                                 struct hid_usage *usage, __s32 value)
 781 {
 782         struct mt_device *td = hid_get_drvdata(hid);
 783         __s32 quirks = td->mtclass.quirks;
 784         struct input_dev *input = field->hidinput->input;
 785
 786         if (hid->claimed & HID_CLAIMED_INPUT) {
 787                 switch (usage->hid) {
 788                 case HID_DG_INRANGE:
 789                         if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 790                                 td->curvalid = value;
 791                         if (quirks & MT_QUIRK_HOVERING)
 792                                 td->curdata.inrange_state = value;
 793                         break;
 794                 case HID_DG_TIPSWITCH:
 795                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 796                                 td->curvalid = value;
 797                         td->curdata.touch_state = value;
 798                         break;
 799                 case HID_DG_CONFIDENCE:
 800                         if (quirks & MT_QUIRK_CONFIDENCE)
 801                                 td->curdata.confidence_state = value;
 802                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 803                                 td->curvalid = value;
 804                         break;
 805                 case HID_DG_CONTACTID:
 806                         td->curdata.contactid = value;
 807                         break;
 808                 case HID_DG_TIPPRESSURE:
 809                         td->curdata.p = value;
 810                         break;
 811                 case HID_GD_X:
 812                         if (usage->code == ABS_MT_TOOL_X)
 813                                 td->curdata.cx = value;
 814                         else
 815                                 td->curdata.x = value;
 816                         break;
 817                 case HID_GD_Y:
 818                         if (usage->code == ABS_MT_TOOL_Y)
 819                                 td->curdata.cy = value;
 820                         else
 821                                 td->curdata.y = value;
 822                         break;
 823                 case HID_DG_WIDTH:
 824                         td->curdata.w = value;
 825                         break;
 826                 case HID_DG_HEIGHT:
 827                         td->curdata.h = value;
 828                         break;
 829                 case HID_DG_SCANTIME:
 830                         td->timestamp = mt_compute_timestamp(td, field, value);
 831                         break;
 832                 case HID_DG_CONTACTCOUNT:
 833                         break;
 834                 case HID_DG_TOUCH:
 835                         /* do nothing */
 836                         break;
 837
 838                 default:
 839                         if (usage->type)
 840                                 input_event(input, usage->type, usage->code,
 841                                                 value);
 842                         return;
 843                 }
 844
 845                 if (usage->usage_index + 1 == field->report_count) {
 846                         /* we only take into account the last report. */
 847                         if (usage->hid == td->last_slot_field)
 848                                 mt_complete_slot(td, field->hidinput->input);
 849                 }
 850
 851         }
 852 }
 853
 854 static void mt_touch_report(struct hid_device *hid, struct hid_report *report)
 855 {
 856         struct mt_device *td = hid_get_drvdata(hid);
 857         struct hid_field *field;
 858         unsigned count;
 859         int r, n;
 860
 861         /* sticky fingers release in progress, abort */
 862         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
 863                 return;
 864
 865         /*
 866          * Includes multi-packet support where subsequent
 867          * packets are sent with zero contactcount.
 868          */
 869         if (td->cc_index >= 0) {
 870                 struct hid_field *field = report->field[td->cc_index];
 871                 int value = field->value[td->cc_value_index];
 872                 if (value)
 873                         td->num_expected = value;
 874         }
 875
 876         for (r = 0; r < report->maxfield; r++) {
 877                 field = report->field[r];
 878                 count = field->report_count;
 879
 880                 if (!(HID_MAIN_ITEM_VARIABLE & field->flags))
 881                         continue;
 882
 883                 for (n = 0; n < count; n++)
 884                         mt_process_mt_event(hid, field, &field->usage[n],
 885                                         field->value[n]);
 886         }
 887
 888         if (td->num_received >= td->num_expected)
 889                 mt_sync_frame(td, report->field[0]->hidinput->input);
 890
 891         /*
 892          * Windows 8 specs says 2 things:
 893          * - once a contact has been reported, it has to be reported in each
 894          *   subsequent report
 895          * - the report rate when fingers are present has to be at least
 896          *   the refresh rate of the screen, 60 or 120 Hz
 897          *
 898          * I interprete this that the specification forces a report rate of
 899          * at least 60 Hz for a touchscreen to be certified.
 900          * Which means that if we do not get a report whithin 16 ms, either
 901          * something wrong happens, either the touchscreen forgets to send
 902          * a release. Taking a reasonable margin allows to remove issues
 903          * with USB communication or the load of the machine.
 904          *
 905          * Given that Win 8 devices are forced to send a release, this will
 906          * only affect laggish machines and the ones that have a firmware
 907          * defect.
 908          */
 909         if (td->mtclass.quirks & MT_QUIRK_STICKY_FINGERS) {
 910                 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
 911                         mod_timer(&td->release_timer,
 912                                   jiffies + msecs_to_jiffies(100));
 913                 else
 914                         del_timer(&td->release_timer);
 915         }
 916
 917         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
 918 }
 919
 920 static int mt_touch_input_configured(struct hid_device *hdev,
 921                                         struct hid_input *hi)
 922 {
 923         struct mt_device *td = hid_get_drvdata(hdev);
 924         struct mt_class *cls = &td->mtclass;
 925         struct input_dev *input = hi->input;
 926         int ret;
 927
 928         if (!td->maxcontacts)
 929                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 930
 931         mt_post_parse(td);
 932         if (td->serial_maybe)
 933                 mt_post_parse_default_settings(td);
 934
 935         if (cls->is_indirect)
 936                 td->mt_flags |= INPUT_MT_POINTER;
 937
 938         if (cls->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 939                 td->mt_flags |= INPUT_MT_DROP_UNUSED;
 940
 941         /* check for clickpads */
 942         if ((td->mt_flags & INPUT_MT_POINTER) && (td->buttons_count == 1))
 943                 td->is_buttonpad = true;
 944
 945         if (td->is_buttonpad)
 946                 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
 947
 948         ret = input_mt_init_slots(input, td->maxcontacts, td->mt_flags);
 949         if (ret)
 950                 return ret;
 951
 952         td->mt_flags = 0;
 953         return 0;
 954 }
 955
 956 #define mt_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, \
 957                                                     max, EV_KEY, (c))
 958 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 959                 struct hid_field *field, struct hid_usage *usage,
 960                 unsigned long **bit, int *max)
 961 {
 962         struct mt_device *td = hid_get_drvdata(hdev);
 963
 964         /*
 965          * If mtclass.export_all_inputs is not set, only map fields from
 966          * TouchScreen or TouchPad collections. We need to ignore fields
 967          * that belong to other collections such as Mouse that might have
 968          * the same GenericDesktop usages.
 969          */
 970         if (!td->mtclass.export_all_inputs &&
 971             field->application != HID_DG_TOUCHSCREEN &&
 972             field->application != HID_DG_PEN &&
 973             field->application != HID_DG_TOUCHPAD &&
 974             field->application != HID_GD_KEYBOARD &&
 975             field->application != HID_GD_SYSTEM_CONTROL &&
 976             field->application != HID_CP_CONSUMER_CONTROL &&
 977             field->application != HID_GD_WIRELESS_RADIO_CTLS &&
 978             !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
 979               td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP))
 980                 return -1;
 981
 982         /*
 983          * Some Asus keyboard+touchpad devices have the hotkeys defined in the
 984          * touchpad report descriptor. We need to treat these as an array to
 985          * map usages to input keys.
 986          */
 987         if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS &&
 988             td->mtclass.quirks & MT_QUIRK_ASUS_CUSTOM_UP &&
 989             (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) {
 990                 set_bit(EV_REP, hi->input->evbit);
 991                 if (field->flags & HID_MAIN_ITEM_VARIABLE)
 992                         field->flags &= ~HID_MAIN_ITEM_VARIABLE;
 993                 switch (usage->hid & HID_USAGE) {
 994                 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN);        break;
 995                 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP);          break;
 996                 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF);           break;
 997                 case 0x6b: mt_map_key_clear(KEY_F21);                   break;
 998                 case 0x6c: mt_map_key_clear(KEY_SLEEP);                 break;
 999                 default:
1000                         return -1;
1001                 }
1002                 return 1;
1003         }
1004
1005         /*
1006          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1007          * for the stylus.
1008          * The check for mt_report_id ensures we don't process
1009          * HID_DG_CONTACTCOUNT from the pen report as it is outside the physical
1010          * collection, but within the report ID.
1011          */
1012         if (field->physical == HID_DG_STYLUS)
1013                 return 0;
1014         else if ((field->physical == 0) &&
1015                  (field->report->id != td->mt_report_id) &&
1016                  (td->mt_report_id != -1))
1017                 return 0;
1018
1019         if (field->application == HID_DG_TOUCHSCREEN ||
1020             field->application == HID_DG_TOUCHPAD)
1021                 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max);
1022
1023         /* let hid-core decide for the others */
1024         return 0;
1025 }
1026
1027 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
1028                 struct hid_field *field, struct hid_usage *usage,
1029                 unsigned long **bit, int *max)
1030 {
1031         /*
1032          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1033          * for the stylus.
1034          */
1035         if (field->physical == HID_DG_STYLUS)
1036                 return 0;
1037
1038         if (field->application == HID_DG_TOUCHSCREEN ||
1039             field->application == HID_DG_TOUCHPAD) {
1040                 /* We own these mappings, tell hid-input to ignore them */
1041                 return -1;
1042         }
1043
1044         /* let hid-core decide for the others */
1045         return 0;
1046 }
1047
1048 static int mt_event(struct hid_device *hid, struct hid_field *field,
1049                                 struct hid_usage *usage, __s32 value)
1050 {
1051         struct mt_device *td = hid_get_drvdata(hid);
1052
1053         if (field->report->id == td->mt_report_id)
1054                 return mt_touch_event(hid, field, usage, value);
1055
1056         return 0;
1057 }
1058
1059 static void mt_report(struct hid_device *hid, struct hid_report *report)
1060 {
1061         struct mt_device *td = hid_get_drvdata(hid);
1062         struct hid_field *field = report->field[0];
1063
1064         if (!(hid->claimed & HID_CLAIMED_INPUT))
1065                 return;
1066
1067         if (report->id == td->mt_report_id)
1068                 return mt_touch_report(hid, report);
1069
1070         if (field && field->hidinput && field->hidinput->input)
1071                 input_sync(field->hidinput->input);
1072 }
1073
1074 static void mt_set_input_mode(struct hid_device *hdev)
1075 {
1076         struct mt_device *td = hid_get_drvdata(hdev);
1077         struct hid_report *r;
1078         struct hid_report_enum *re;
1079         struct mt_class *cls = &td->mtclass;
1080         char *buf;
1081         int report_len;
1082
1083         if (td->inputmode < 0)
1084                 return;
1085
1086         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
1087         r = re->report_id_hash[td->inputmode];
1088         if (r) {
1089                 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) {
1090                         report_len = hid_report_len(r);
1091                         buf = hid_alloc_report_buf(r, GFP_KERNEL);
1092                         if (!buf) {
1093                                 hid_err(hdev, "failed to allocate buffer for report\n");
1094                                 return;
1095                         }
1096                         hid_hw_raw_request(hdev, r->id, buf, report_len,
1097                                            HID_FEATURE_REPORT,
1098                                            HID_REQ_GET_REPORT);
1099                         kfree(buf);
1100                 }
1101                 r->field[0]->value[td->inputmode_index] = td->inputmode_value;
1102                 hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1103         }
1104 }
1105
1106 static void mt_set_maxcontacts(struct hid_device *hdev)
1107 {
1108         struct mt_device *td = hid_get_drvdata(hdev);
1109         struct hid_report *r;
1110         struct hid_report_enum *re;
1111         int fieldmax, max;
1112
1113         if (td->maxcontact_report_id < 0)
1114                 return;
1115
1116         if (!td->mtclass.maxcontacts)
1117                 return;
1118
1119         re = &hdev->report_enum[HID_FEATURE_REPORT];
1120         r = re->report_id_hash[td->maxcontact_report_id];
1121         if (r) {
1122                 max = td->mtclass.maxcontacts;
1123                 fieldmax = r->field[0]->logical_maximum;
1124                 max = min(fieldmax, max);
1125                 if (r->field[0]->value[0] != max) {
1126                         r->field[0]->value[0] = max;
1127                         hid_hw_request(hdev, r, HID_REQ_SET_REPORT);
1128                 }
1129         }
1130 }
1131
1132 static void mt_post_parse_default_settings(struct mt_device *td)
1133 {
1134         __s32 quirks = td->mtclass.quirks;
1135
1136         /* unknown serial device needs special quirks */
1137         if (td->touches_by_report == 1) {
1138                 quirks |= MT_QUIRK_ALWAYS_VALID;
1139                 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP;
1140                 quirks &= ~MT_QUIRK_VALID_IS_INRANGE;
1141                 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE;
1142                 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1143         }
1144
1145         td->mtclass.quirks = quirks;
1146 }
1147
1148 static void mt_post_parse(struct mt_device *td)
1149 {
1150         struct mt_fields *f = td->fields;
1151         struct mt_class *cls = &td->mtclass;
1152
1153         if (td->touches_by_report > 0) {
1154                 int field_count_per_touch = f->length / td->touches_by_report;
1155                 td->last_slot_field = f->usages[field_count_per_touch - 1];
1156         }
1157
1158         if (td->cc_index < 0)
1159                 cls->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE;
1160 }
1161
1162 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi)
1163 {
1164         struct mt_device *td = hid_get_drvdata(hdev);
1165         char *name;
1166         const char *suffix = NULL;
1167         struct hid_field *field = hi->report->field[0];
1168         int ret;
1169
1170         if (hi->report->id == td->mt_report_id) {
1171                 ret = mt_touch_input_configured(hdev, hi);
1172                 if (ret)
1173                         return ret;
1174         }
1175
1176         /*
1177          * some egalax touchscreens have "application == HID_DG_TOUCHSCREEN"
1178          * for the stylus. Check this first, and then rely on the application
1179          * field.
1180          */
1181         if (hi->report->field[0]->physical == HID_DG_STYLUS) {
1182                 suffix = "Pen";
1183                 /* force BTN_STYLUS to allow tablet matching in udev */
1184                 __set_bit(BTN_STYLUS, hi->input->keybit);
1185         } else {
1186                 switch (field->application) {
1187                 case HID_GD_KEYBOARD:
1188                         suffix = "Keyboard";
1189                         break;
1190                 case HID_GD_KEYPAD:
1191                         suffix = "Keypad";
1192                         break;
1193                 case HID_GD_MOUSE:
1194                         suffix = "Mouse";
1195                         break;
1196                 case HID_DG_STYLUS:
1197                         suffix = "Pen";
1198                         /* force BTN_STYLUS to allow tablet matching in udev */
1199                         __set_bit(BTN_STYLUS, hi->input->keybit);
1200                         break;
1201                 case HID_DG_TOUCHSCREEN:
1202                         /* we do not set suffix = "Touchscreen" */
1203                         break;
1204                 case HID_DG_TOUCHPAD:
1205                         suffix = "Touchpad";
1206                         break;
1207                 case HID_GD_SYSTEM_CONTROL:
1208                         suffix = "System Control";
1209                         break;
1210                 case HID_CP_CONSUMER_CONTROL:
1211                         suffix = "Consumer Control";
1212                         break;
1213                 case HID_GD_WIRELESS_RADIO_CTLS:
1214                         suffix = "Wireless Radio Control";
1215                         break;
1216                 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS:
1217                         suffix = "Custom Media Keys";
1218                         break;
1219                 default:
1220                         suffix = "UNKNOWN";
1221                         break;
1222                 }
1223         }
1224
1225         if (suffix) {
1226                 name = devm_kzalloc(&hi->input->dev,
1227                                     strlen(hdev->name) + strlen(suffix) + 2,
1228                                     GFP_KERNEL);
1229                 if (name) {
1230                         sprintf(name, "%s %s", hdev->name, suffix);
1231                         hi->input->name = name;
1232                 }
1233         }
1234
1235         return 0;
1236 }
1237
1238 static void mt_fix_const_field(struct hid_field *field, unsigned int usage)
1239 {
1240         if (field->usage[0].hid != usage ||
1241             !(field->flags & HID_MAIN_ITEM_CONSTANT))
1242                 return;
1243
1244         field->flags &= ~HID_MAIN_ITEM_CONSTANT;
1245         field->flags |= HID_MAIN_ITEM_VARIABLE;
1246 }
1247
1248 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage)
1249 {
1250         struct hid_report *report;
1251         int i;
1252
1253         list_for_each_entry(report,
1254                             &hdev->report_enum[HID_INPUT_REPORT].report_list,
1255                             list) {
1256
1257                 if (!report->maxfield)
1258                         continue;
1259
1260                 for (i = 0; i < report->maxfield; i++)
1261                         if (report->field[i]->maxusage >= 1)
1262                                 mt_fix_const_field(report->field[i], usage);
1263         }
1264 }
1265
1266 static void mt_release_contacts(struct hid_device *hid)
1267 {
1268         struct hid_input *hidinput;
1269         struct mt_device *td = hid_get_drvdata(hid);
1270
1271         list_for_each_entry(hidinput, &hid->inputs, list) {
1272                 struct input_dev *input_dev = hidinput->input;
1273                 struct input_mt *mt = input_dev->mt;
1274                 int i;
1275
1276                 if (mt) {
1277                         for (i = 0; i < mt->num_slots; i++) {
1278                                 input_mt_slot(input_dev, i);
1279                                 input_mt_report_slot_state(input_dev,
1280                                                            MT_TOOL_FINGER,
1281                                                            false);
1282                         }
1283                         input_mt_sync_frame(input_dev);
1284                         input_sync(input_dev);
1285                 }
1286         }
1287
1288         td->num_received = 0;
1289 }
1290
1291 static void mt_expired_timeout(unsigned long arg)
1292 {
1293         struct hid_device *hdev = (void *)arg;
1294         struct mt_device *td = hid_get_drvdata(hdev);
1295
1296         /*
1297          * An input report came in just before we release the sticky fingers,
1298          * it will take care of the sticky fingers.
1299          */
1300         if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags))
1301                 return;
1302         if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags))
1303                 mt_release_contacts(hdev);
1304         clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags);
1305 }
1306
1307 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
1308 {
1309         int ret, i;
1310         struct mt_device *td;
1311         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
1312
1313         for (i = 0; mt_classes[i].name ; i++) {
1314                 if (id->driver_data == mt_classes[i].name) {
1315                         mtclass = &(mt_classes[i]);
1316                         break;
1317                 }
1318         }
1319
1320         td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL);
1321         if (!td) {
1322                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
1323                 return -ENOMEM;
1324         }
1325         td->mtclass = *mtclass;
1326         td->inputmode = -1;
1327         td->maxcontact_report_id = -1;
1328         td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN;
1329         td->cc_index = -1;
1330         td->mt_report_id = -1;
1331         hid_set_drvdata(hdev, td);
1332
1333         td->fields = devm_kzalloc(&hdev->dev, sizeof(struct mt_fields),
1334                                   GFP_KERNEL);
1335         if (!td->fields) {
1336                 dev_err(&hdev->dev, "cannot allocate multitouch fields data\n");
1337                 return -ENOMEM;
1338         }
1339
1340         if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID)
1341                 td->serial_maybe = true;
1342
1343         /*
1344          * Store the initial quirk state
1345          */
1346         td->initial_quirks = hdev->quirks;
1347
1348         /* This allows the driver to correctly support devices
1349          * that emit events over several HID messages.
1350          */
1351         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
1352
1353         /*
1354          * This allows the driver to handle different input sensors
1355          * that emits events through different reports on the same HID
1356          * device.
1357          */
1358         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
1359         hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
1360
1361         /*
1362          * Some multitouch screens do not like to be polled for input
1363          * reports. Fortunately, the Win8 spec says that all touches
1364          * should be sent during each report, making the initialization
1365          * of input reports unnecessary. For Win7 devices, well, let's hope
1366          * they will still be happy (this is only be a problem if a touch
1367          * was already there while probing the device).
1368          *
1369          * In addition some touchpads do not behave well if we read
1370          * all feature reports from them. Instead we prevent
1371          * initial report fetching and then selectively fetch each
1372          * report we are interested in.
1373          */
1374         hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
1375
1376         setup_timer(&td->release_timer, mt_expired_timeout, (long)hdev);
1377
1378         ret = hid_parse(hdev);
1379         if (ret != 0)
1380                 return ret;
1381
1382         if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID)
1383                 mt_fix_const_fields(hdev, HID_DG_CONTACTID);
1384
1385         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
1386         if (ret)
1387                 return ret;
1388
1389         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
1390         if (ret)
1391                 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n",
1392                                 hdev->name);
1393
1394         mt_set_maxcontacts(hdev);
1395         mt_set_input_mode(hdev);
1396
1397         /* release .fields memory as it is not used anymore */
1398         devm_kfree(&hdev->dev, td->fields);
1399         td->fields = NULL;
1400
1401         return 0;
1402 }
1403
1404 #ifdef CONFIG_PM
1405 static int mt_reset_resume(struct hid_device *hdev)
1406 {
1407         mt_release_contacts(hdev);
1408         mt_set_maxcontacts(hdev);
1409         mt_set_input_mode(hdev);
1410         return 0;
1411 }
1412
1413 static int mt_resume(struct hid_device *hdev)
1414 {
1415         /* Some Elan legacy devices require SET_IDLE to be set on resume.
1416          * It should be safe to send it to other devices too.
1417          * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */
1418
1419         hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE);
1420
1421         return 0;
1422 }
1423 #endif
1424
1425 static void mt_remove(struct hid_device *hdev)
1426 {
1427         struct mt_device *td = hid_get_drvdata(hdev);
1428
1429         del_timer_sync(&td->release_timer);
1430
1431         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
1432         hid_hw_stop(hdev);
1433         hdev->quirks = td->initial_quirks;
1434 }
1435
1436 /*
1437  * This list contains only:
1438  * - VID/PID of products not working with the default multitouch handling
1439  * - 2 generic rules.
1440  * So there is no point in adding here any device with MT_CLS_DEFAULT.
1441  */
1442 static const struct hid_device_id mt_devices[] = {
1443
1444         /* 3M panels */
1445         { .driver_data = MT_CLS_3M,
1446                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1447                         USB_DEVICE_ID_3M1968) },
1448         { .driver_data = MT_CLS_3M,
1449                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1450                         USB_DEVICE_ID_3M2256) },
1451         { .driver_data = MT_CLS_3M,
1452                 MT_USB_DEVICE(USB_VENDOR_ID_3M,
1453                         USB_DEVICE_ID_3M3266) },
1454
1455         /* Alps devices */
1456         { .driver_data = MT_CLS_WIN_8_DUAL,
1457                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1458                         USB_VENDOR_ID_ALPS_JP,
1459                         HID_DEVICE_ID_ALPS_U1_DUAL_PTP) },
1460         { .driver_data = MT_CLS_WIN_8_DUAL,
1461                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1462                         USB_VENDOR_ID_ALPS_JP,
1463                         HID_DEVICE_ID_ALPS_U1_DUAL_3BTN_PTP) },
1464
1465         /* Lenovo X1 TAB Gen 2 */
1466         { .driver_data = MT_CLS_WIN_8_DUAL,
1467                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1468                            USB_VENDOR_ID_LENOVO,
1469                            USB_DEVICE_ID_LENOVO_X1_TAB) },
1470
1471         /* Anton devices */
1472         { .driver_data = MT_CLS_EXPORT_ALL_INPUTS,
1473                 MT_USB_DEVICE(USB_VENDOR_ID_ANTON,
1474                         USB_DEVICE_ID_ANTON_TOUCH_PAD) },
1475
1476         /* Asus T304UA */
1477         { .driver_data = MT_CLS_ASUS,
1478                 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8,
1479                         USB_VENDOR_ID_ASUSTEK,
1480                         USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) },
1481
1482         /* Atmel panels */
1483         { .driver_data = MT_CLS_SERIAL,
1484                 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL,
1485                         USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) },
1486
1487         /* Baanto multitouch devices */
1488         { .driver_data = MT_CLS_NSMU,
1489                 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO,
1490                         USB_DEVICE_ID_BAANTO_MT_190W2) },
1491
1492         /* Cando panels */
1493         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1494                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1495                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
1496         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
1497                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1498                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
1499
1500         /* Chunghwa Telecom touch panels */
1501         {  .driver_data = MT_CLS_NSMU,
1502                 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
1503                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
1504
1505         /* CJTouch panels */
1506         { .driver_data = MT_CLS_NSMU,
1507                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1508                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) },
1509         { .driver_data = MT_CLS_NSMU,
1510                 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH,
1511                         USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) },
1512
1513         /* CVTouch panels */
1514         { .driver_data = MT_CLS_NSMU,
1515                 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
1516                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
1517
1518         /* eGalax devices (resistive) */
1519         { .driver_data = MT_CLS_EGALAX,
1520                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1521                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
1522         { .driver_data = MT_CLS_EGALAX,
1523                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1524                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
1525
1526         /* eGalax devices (capacitive) */
1527         { .driver_data = MT_CLS_EGALAX_SERIAL,
1528                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1529                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) },
1530         { .driver_data = MT_CLS_EGALAX,
1531                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1532                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
1533         { .driver_data = MT_CLS_EGALAX_SERIAL,
1534                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1535                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) },
1536         { .driver_data = MT_CLS_EGALAX_SERIAL,
1537                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1538                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) },
1539         { .driver_data = MT_CLS_EGALAX_SERIAL,
1540                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1541                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) },
1542         { .driver_data = MT_CLS_EGALAX_SERIAL,
1543                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1544                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) },
1545         { .driver_data = MT_CLS_EGALAX,
1546                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1547                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
1548         { .driver_data = MT_CLS_EGALAX,
1549                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1550                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
1551         { .driver_data = MT_CLS_EGALAX_SERIAL,
1552                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1553                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) },
1554         { .driver_data = MT_CLS_EGALAX,
1555                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1556                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) },
1557         { .driver_data = MT_CLS_EGALAX,
1558                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
1559                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) },
1560         { .driver_data = MT_CLS_EGALAX,
1561                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1562                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
1563         { .driver_data = MT_CLS_EGALAX,
1564                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1565                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
1566         { .driver_data = MT_CLS_EGALAX_SERIAL,
1567                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1568                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) },
1569         { .driver_data = MT_CLS_EGALAX_SERIAL,
1570                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1571                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) },
1572         { .driver_data = MT_CLS_EGALAX_SERIAL,
1573                 MT_USB_DEVICE(USB_VENDOR_ID_DWAV,
1574                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
1575
1576         /* Elitegroup panel */
1577         { .driver_data = MT_CLS_SERIAL,
1578                 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP,
1579                         USB_DEVICE_ID_ELITEGROUP_05D8) },
1580
1581         /* Flatfrog Panels */
1582         { .driver_data = MT_CLS_FLATFROG,
1583                 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG,
1584                         USB_DEVICE_ID_MULTITOUCH_3200) },
1585
1586         /* FocalTech Panels */
1587         { .driver_data = MT_CLS_SERIAL,
1588                 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL,
1589                         USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) },
1590
1591         /* GeneralTouch panel */
1592         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1593                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1594                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
1595         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1596                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1597                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) },
1598         { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS,
1599                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1600                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) },
1601         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1602                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1603                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) },
1604         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1605                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1606                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) },
1607         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1608                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1609                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) },
1610         { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS,
1611                 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
1612                         USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) },
1613
1614         /* Gametel game controller */
1615         { .driver_data = MT_CLS_NSMU,
1616                 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL,
1617                         USB_DEVICE_ID_GAMETEL_MT_MODE) },
1618
1619         /* GoodTouch panels */
1620         { .driver_data = MT_CLS_NSMU,
1621                 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
1622                         USB_DEVICE_ID_GOODTOUCH_000f) },
1623
1624         /* Hanvon panels */
1625         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1626                 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
1627                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
1628
1629         /* Ilitek dual touch panel */
1630         {  .driver_data = MT_CLS_NSMU,
1631                 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK,
1632                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
1633
1634         /* LG Melfas panel */
1635         { .driver_data = MT_CLS_LG,
1636                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
1637                         USB_DEVICE_ID_LG_MELFAS_MT) },
1638
1639         /* MosArt panels */
1640         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1641                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1642                         USB_DEVICE_ID_ASUS_T91MT)},
1643         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1644                 MT_USB_DEVICE(USB_VENDOR_ID_ASUS,
1645                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
1646         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
1647                 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX,
1648                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
1649
1650         /* Panasonic panels */
1651         { .driver_data = MT_CLS_PANASONIC,
1652                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1653                         USB_DEVICE_ID_PANABOARD_UBT780) },
1654         { .driver_data = MT_CLS_PANASONIC,
1655                 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC,
1656                         USB_DEVICE_ID_PANABOARD_UBT880) },
1657
1658         /* Novatek Panel */
1659         { .driver_data = MT_CLS_NSMU,
1660                 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK,
1661                         USB_DEVICE_ID_NOVATEK_PCT) },
1662
1663         /* Ntrig Panel */
1664         { .driver_data = MT_CLS_NSMU,
1665                 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8,
1666                         USB_VENDOR_ID_NTRIG, 0x1b05) },
1667
1668         /* PixArt optical touch screen */
1669         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1670                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1671                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) },
1672         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1673                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1674                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) },
1675         { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER,
1676                 MT_USB_DEVICE(USB_VENDOR_ID_PIXART,
1677                         USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) },
1678
1679         /* PixCir-based panels */
1680         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
1681                 MT_USB_DEVICE(USB_VENDOR_ID_CANDO,
1682                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
1683
1684         /* Quanta-based panels */
1685         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
1686                 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
1687                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
1688
1689         /* Stantum panels */
1690         { .driver_data = MT_CLS_CONFIDENCE,
1691                 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
1692                         USB_DEVICE_ID_MTP_STM)},
1693
1694         /* TopSeed panels */
1695         { .driver_data = MT_CLS_TOPSEED,
1696                 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2,
1697                         USB_DEVICE_ID_TOPSEED2_PERIPAD_701) },
1698
1699         /* Touch International panels */
1700         { .driver_data = MT_CLS_NSMU,
1701                 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
1702                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
1703
1704         /* Unitec panels */
1705         { .driver_data = MT_CLS_NSMU,
1706                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1707                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
1708         { .driver_data = MT_CLS_NSMU,
1709                 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC,
1710                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
1711
1712         /* VTL panels */
1713         { .driver_data = MT_CLS_VTL,
1714                 MT_USB_DEVICE(USB_VENDOR_ID_VTL,
1715                         USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) },
1716
1717         /* Wistron panels */
1718         { .driver_data = MT_CLS_NSMU,
1719                 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON,
1720                         USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) },
1721
1722         /* XAT */
1723         { .driver_data = MT_CLS_NSMU,
1724                 MT_USB_DEVICE(USB_VENDOR_ID_XAT,
1725                         USB_DEVICE_ID_XAT_CSR) },
1726
1727         /* Xiroku */
1728         { .driver_data = MT_CLS_NSMU,
1729                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1730                         USB_DEVICE_ID_XIROKU_SPX) },
1731         { .driver_data = MT_CLS_NSMU,
1732                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1733                         USB_DEVICE_ID_XIROKU_MPX) },
1734         { .driver_data = MT_CLS_NSMU,
1735                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1736                         USB_DEVICE_ID_XIROKU_CSR) },
1737         { .driver_data = MT_CLS_NSMU,
1738                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1739                         USB_DEVICE_ID_XIROKU_SPX1) },
1740         { .driver_data = MT_CLS_NSMU,
1741                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1742                         USB_DEVICE_ID_XIROKU_MPX1) },
1743         { .driver_data = MT_CLS_NSMU,
1744                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1745                         USB_DEVICE_ID_XIROKU_CSR1) },
1746         { .driver_data = MT_CLS_NSMU,
1747                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1748                         USB_DEVICE_ID_XIROKU_SPX2) },
1749         { .driver_data = MT_CLS_NSMU,
1750                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1751                         USB_DEVICE_ID_XIROKU_MPX2) },
1752         { .driver_data = MT_CLS_NSMU,
1753                 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU,
1754                         USB_DEVICE_ID_XIROKU_CSR2) },
1755
1756         /* Google MT devices */
1757         { .driver_data = MT_CLS_GOOGLE,
1758                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE,
1759                         USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) },
1760
1761         /* Generic MT device */
1762         { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) },
1763
1764         /* Generic Win 8 certified MT device */
1765         {  .driver_data = MT_CLS_WIN_8,
1766                 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8,
1767                         HID_ANY_ID, HID_ANY_ID) },
1768         { }
1769 };
1770 MODULE_DEVICE_TABLE(hid, mt_devices);
1771
1772 static const struct hid_usage_id mt_grabbed_usages[] = {
1773         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
1774         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
1775 };
1776
1777 static struct hid_driver mt_driver = {
1778         .name = "hid-multitouch",
1779         .id_table = mt_devices,
1780         .probe = mt_probe,
1781         .remove = mt_remove,
1782         .input_mapping = mt_input_mapping,
1783         .input_mapped = mt_input_mapped,
1784         .input_configured = mt_input_configured,
1785         .feature_mapping = mt_feature_mapping,
1786         .usage_table = mt_grabbed_usages,
1787         .event = mt_event,
1788         .report = mt_report,
1789 #ifdef CONFIG_PM
1790         .reset_resume = mt_reset_resume,
1791         .resume = mt_resume,
1792 #endif
1793 };
1794 module_hid_driver(mt_driver);