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