Pileus Git - ~andy/linux/blob - drivers/hid/hid-multitouch.c

   1 /*
   2  *  HID driver for multitouch panels
   3  *
   4  *  Copyright (c) 2010-2011 Stephane Chatty <chatty@enac.fr>
   5  *  Copyright (c) 2010-2011 Benjamin Tissoires <benjamin.tissoires@gmail.com>
   6  *  Copyright (c) 2010-2011 Ecole Nationale de l'Aviation Civile, France
   7  *
   8  *  This code is partly based on hid-egalax.c:
   9  *
  10  *  Copyright (c) 2010 Stephane Chatty <chatty@enac.fr>
  11  *  Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se>
  12  *  Copyright (c) 2010 Canonical, Ltd.
  13  *
  14  *  This code is partly based on hid-3m-pct.c:
  15  *
  16  *  Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr>
  17  *  Copyright (c) 2010      Henrik Rydberg <rydberg@euromail.se>
  18  *  Copyright (c) 2010      Canonical, Ltd.
  19  *
  20  */
  21
  22 /*
  23  * This program is free software; you can redistribute it and/or modify it
  24  * under the terms of the GNU General Public License as published by the Free
  25  * Software Foundation; either version 2 of the License, or (at your option)
  26  * any later version.
  27  */
  28
  29 #include <linux/device.h>
  30 #include <linux/hid.h>
  31 #include <linux/module.h>
  32 #include <linux/slab.h>
  33 #include <linux/usb.h>
  34 #include <linux/input/mt.h>
  35 #include "usbhid/usbhid.h"
  36
  37
  38 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>");
  39 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
  40 MODULE_DESCRIPTION("HID multitouch panels");
  41 MODULE_LICENSE("GPL");
  42
  43 #include "hid-ids.h"
  44
  45 /* quirks to control the device */
  46 #define MT_QUIRK_NOT_SEEN_MEANS_UP      (1 << 0)
  47 #define MT_QUIRK_SLOT_IS_CONTACTID      (1 << 1)
  48 #define MT_QUIRK_CYPRESS                (1 << 2)
  49 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER  (1 << 3)
  50 #define MT_QUIRK_ALWAYS_VALID           (1 << 4)
  51 #define MT_QUIRK_VALID_IS_INRANGE       (1 << 5)
  52 #define MT_QUIRK_VALID_IS_CONFIDENCE    (1 << 6)
  53 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE    (1 << 8)
  54
  55 struct mt_slot {
  56         __s32 x, y, p, w, h;
  57         __s32 contactid;        /* the device ContactID assigned to this slot */
  58         bool touch_state;       /* is the touch valid? */
  59         bool seen_in_this_frame;/* has this slot been updated */
  60 };
  61
  62 struct mt_class {
  63         __s32 name;     /* MT_CLS */
  64         __s32 quirks;
  65         __s32 sn_move;  /* Signal/noise ratio for move events */
  66         __s32 sn_width; /* Signal/noise ratio for width events */
  67         __s32 sn_height;        /* Signal/noise ratio for height events */
  68         __s32 sn_pressure;      /* Signal/noise ratio for pressure events */
  69         __u8 maxcontacts;
  70 };
  71
  72 struct mt_device {
  73         struct mt_slot curdata; /* placeholder of incoming data */
  74         struct mt_class mtclass;        /* our mt device class */
  75         unsigned last_field_index;      /* last field index of the report */
  76         unsigned last_slot_field;       /* the last field of a slot */
  77         int last_mt_collection; /* last known mt-related collection */
  78         __s8 inputmode;         /* InputMode HID feature, -1 if non-existent */
  79         __u8 num_received;      /* how many contacts we received */
  80         __u8 num_expected;      /* expected last contact index */
  81         __u8 maxcontacts;
  82         bool curvalid;          /* is the current contact valid? */
  83         struct mt_slot *slots;
  84 };
  85
  86 /* classes of device behavior */
  87 #define MT_CLS_DEFAULT                          0x0001
  88
  89 #define MT_CLS_SERIAL                           0x0002
  90 #define MT_CLS_CONFIDENCE                       0x0003
  91 #define MT_CLS_CONFIDENCE_CONTACT_ID            0x0004
  92 #define MT_CLS_CONFIDENCE_MINUS_ONE             0x0005
  93 #define MT_CLS_DUAL_INRANGE_CONTACTID           0x0006
  94 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER       0x0007
  95 #define MT_CLS_DUAL_NSMU_CONTACTID              0x0008
  96
  97 /* vendor specific classes */
  98 #define MT_CLS_3M                               0x0101
  99 #define MT_CLS_CYPRESS                          0x0102
 100 #define MT_CLS_EGALAX                           0x0103
 101 #define MT_CLS_EGALAX_SERIAL                    0x0104
 102
 103 #define MT_DEFAULT_MAXCONTACT   10
 104
 105 /*
 106  * these device-dependent functions determine what slot corresponds
 107  * to a valid contact that was just read.
 108  */
 109
 110 static int cypress_compute_slot(struct mt_device *td)
 111 {
 112         if (td->curdata.contactid != 0 || td->num_received == 0)
 113                 return td->curdata.contactid;
 114         else
 115                 return -1;
 116 }
 117
 118 static int find_slot_from_contactid(struct mt_device *td)
 119 {
 120         int i;
 121         for (i = 0; i < td->maxcontacts; ++i) {
 122                 if (td->slots[i].contactid == td->curdata.contactid &&
 123                         td->slots[i].touch_state)
 124                         return i;
 125         }
 126         for (i = 0; i < td->maxcontacts; ++i) {
 127                 if (!td->slots[i].seen_in_this_frame &&
 128                         !td->slots[i].touch_state)
 129                         return i;
 130         }
 131         /* should not occurs. If this happens that means
 132          * that the device sent more touches that it says
 133          * in the report descriptor. It is ignored then. */
 134         return -1;
 135 }
 136
 137 struct mt_class mt_classes[] = {
 138         { .name = MT_CLS_DEFAULT,
 139                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP },
 140         { .name = MT_CLS_SERIAL,
 141                 .quirks = MT_QUIRK_ALWAYS_VALID},
 142         { .name = MT_CLS_CONFIDENCE,
 143                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE },
 144         { .name = MT_CLS_CONFIDENCE_CONTACT_ID,
 145                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 146                         MT_QUIRK_SLOT_IS_CONTACTID },
 147         { .name = MT_CLS_CONFIDENCE_MINUS_ONE,
 148                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 149                         MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE },
 150         { .name = MT_CLS_DUAL_INRANGE_CONTACTID,
 151                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 152                         MT_QUIRK_SLOT_IS_CONTACTID,
 153                 .maxcontacts = 2 },
 154         { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 155                 .quirks = MT_QUIRK_VALID_IS_INRANGE |
 156                         MT_QUIRK_SLOT_IS_CONTACTNUMBER,
 157                 .maxcontacts = 2 },
 158         { .name = MT_CLS_DUAL_NSMU_CONTACTID,
 159                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 160                         MT_QUIRK_SLOT_IS_CONTACTID,
 161                 .maxcontacts = 2 },
 162
 163         /*
 164          * vendor specific classes
 165          */
 166         { .name = MT_CLS_3M,
 167                 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE |
 168                         MT_QUIRK_SLOT_IS_CONTACTID,
 169                 .sn_move = 2048,
 170                 .sn_width = 128,
 171                 .sn_height = 128 },
 172         { .name = MT_CLS_CYPRESS,
 173                 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP |
 174                         MT_QUIRK_CYPRESS,
 175                 .maxcontacts = 10 },
 176         { .name = MT_CLS_EGALAX,
 177                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 178                         MT_QUIRK_VALID_IS_INRANGE,
 179                 .sn_move = 4096,
 180                 .sn_pressure = 32,
 181         },
 182         { .name = MT_CLS_EGALAX_SERIAL,
 183                 .quirks =  MT_QUIRK_SLOT_IS_CONTACTID |
 184                         MT_QUIRK_ALWAYS_VALID,
 185                 .sn_move = 4096,
 186                 .sn_pressure = 32,
 187         },
 188
 189         { }
 190 };
 191
 192 static ssize_t mt_show_quirks(struct device *dev,
 193                            struct device_attribute *attr,
 194                            char *buf)
 195 {
 196         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 197         struct mt_device *td = hid_get_drvdata(hdev);
 198
 199         return sprintf(buf, "%u\n", td->mtclass.quirks);
 200 }
 201
 202 static ssize_t mt_set_quirks(struct device *dev,
 203                           struct device_attribute *attr,
 204                           const char *buf, size_t count)
 205 {
 206         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 207         struct mt_device *td = hid_get_drvdata(hdev);
 208
 209         unsigned long val;
 210
 211         if (kstrtoul(buf, 0, &val))
 212                 return -EINVAL;
 213
 214         td->mtclass.quirks = val;
 215
 216         return count;
 217 }
 218
 219 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks);
 220
 221 static struct attribute *sysfs_attrs[] = {
 222         &dev_attr_quirks.attr,
 223         NULL
 224 };
 225
 226 static struct attribute_group mt_attribute_group = {
 227         .attrs = sysfs_attrs
 228 };
 229
 230 static void mt_feature_mapping(struct hid_device *hdev,
 231                 struct hid_field *field, struct hid_usage *usage)
 232 {
 233         struct mt_device *td = hid_get_drvdata(hdev);
 234
 235         switch (usage->hid) {
 236         case HID_DG_INPUTMODE:
 237                 td->inputmode = field->report->id;
 238                 break;
 239         case HID_DG_CONTACTMAX:
 240                 td->maxcontacts = field->value[0];
 241                 if (td->mtclass.maxcontacts)
 242                         /* check if the maxcontacts is given by the class */
 243                         td->maxcontacts = td->mtclass.maxcontacts;
 244
 245                 break;
 246         }
 247 }
 248
 249 static void set_abs(struct input_dev *input, unsigned int code,
 250                 struct hid_field *field, int snratio)
 251 {
 252         int fmin = field->logical_minimum;
 253         int fmax = field->logical_maximum;
 254         int fuzz = snratio ? (fmax - fmin) / snratio : 0;
 255         input_set_abs_params(input, code, fmin, fmax, fuzz, 0);
 256 }
 257
 258 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 259                 struct hid_field *field, struct hid_usage *usage,
 260                 unsigned long **bit, int *max)
 261 {
 262         struct mt_device *td = hid_get_drvdata(hdev);
 263         struct mt_class *cls = &td->mtclass;
 264
 265         /* Only map fields from TouchScreen or TouchPad collections.
 266          * We need to ignore fields that belong to other collections
 267          * such as Mouse that might have the same GenericDesktop usages. */
 268         if (field->application == HID_DG_TOUCHSCREEN)
 269                 set_bit(INPUT_PROP_DIRECT, hi->input->propbit);
 270         else if (field->application == HID_DG_TOUCHPAD)
 271                 set_bit(INPUT_PROP_POINTER, hi->input->propbit);
 272         else
 273                 return 0;
 274
 275         /* eGalax devices provide a Digitizer.Stylus input which overrides
 276          * the correct Digitizers.Finger X/Y ranges.
 277          * Let's just ignore this input. */
 278         if (field->physical == HID_DG_STYLUS)
 279                 return -1;
 280
 281         switch (usage->hid & HID_USAGE_PAGE) {
 282
 283         case HID_UP_GENDESK:
 284                 switch (usage->hid) {
 285                 case HID_GD_X:
 286                         hid_map_usage(hi, usage, bit, max,
 287                                         EV_ABS, ABS_MT_POSITION_X);
 288                         set_abs(hi->input, ABS_MT_POSITION_X, field,
 289                                 cls->sn_move);
 290                         /* touchscreen emulation */
 291                         set_abs(hi->input, ABS_X, field, cls->sn_move);
 292                         if (td->last_mt_collection == usage->collection_index) {
 293                                 td->last_slot_field = usage->hid;
 294                                 td->last_field_index = field->index;
 295                         }
 296                         return 1;
 297                 case HID_GD_Y:
 298                         hid_map_usage(hi, usage, bit, max,
 299                                         EV_ABS, ABS_MT_POSITION_Y);
 300                         set_abs(hi->input, ABS_MT_POSITION_Y, field,
 301                                 cls->sn_move);
 302                         /* touchscreen emulation */
 303                         set_abs(hi->input, ABS_Y, field, cls->sn_move);
 304                         if (td->last_mt_collection == usage->collection_index) {
 305                                 td->last_slot_field = usage->hid;
 306                                 td->last_field_index = field->index;
 307                         }
 308                         return 1;
 309                 }
 310                 return 0;
 311
 312         case HID_UP_DIGITIZER:
 313                 switch (usage->hid) {
 314                 case HID_DG_INRANGE:
 315                         if (td->last_mt_collection == usage->collection_index) {
 316                                 td->last_slot_field = usage->hid;
 317                                 td->last_field_index = field->index;
 318                         }
 319                         return 1;
 320                 case HID_DG_CONFIDENCE:
 321                         if (td->last_mt_collection == usage->collection_index) {
 322                                 td->last_slot_field = usage->hid;
 323                                 td->last_field_index = field->index;
 324                         }
 325                         return 1;
 326                 case HID_DG_TIPSWITCH:
 327                         hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH);
 328                         input_set_capability(hi->input, EV_KEY, BTN_TOUCH);
 329                         if (td->last_mt_collection == usage->collection_index) {
 330                                 td->last_slot_field = usage->hid;
 331                                 td->last_field_index = field->index;
 332                         }
 333                         return 1;
 334                 case HID_DG_CONTACTID:
 335                         if (!td->maxcontacts)
 336                                 td->maxcontacts = MT_DEFAULT_MAXCONTACT;
 337                         input_mt_init_slots(hi->input, td->maxcontacts);
 338                         td->last_slot_field = usage->hid;
 339                         td->last_field_index = field->index;
 340                         td->last_mt_collection = usage->collection_index;
 341                         return 1;
 342                 case HID_DG_WIDTH:
 343                         hid_map_usage(hi, usage, bit, max,
 344                                         EV_ABS, ABS_MT_TOUCH_MAJOR);
 345                         set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field,
 346                                 cls->sn_width);
 347                         if (td->last_mt_collection == usage->collection_index) {
 348                                 td->last_slot_field = usage->hid;
 349                                 td->last_field_index = field->index;
 350                         }
 351                         return 1;
 352                 case HID_DG_HEIGHT:
 353                         hid_map_usage(hi, usage, bit, max,
 354                                         EV_ABS, ABS_MT_TOUCH_MINOR);
 355                         set_abs(hi->input, ABS_MT_TOUCH_MINOR, field,
 356                                 cls->sn_height);
 357                         input_set_abs_params(hi->input,
 358                                         ABS_MT_ORIENTATION, 0, 1, 0, 0);
 359                         if (td->last_mt_collection == usage->collection_index) {
 360                                 td->last_slot_field = usage->hid;
 361                                 td->last_field_index = field->index;
 362                         }
 363                         return 1;
 364                 case HID_DG_TIPPRESSURE:
 365                         hid_map_usage(hi, usage, bit, max,
 366                                         EV_ABS, ABS_MT_PRESSURE);
 367                         set_abs(hi->input, ABS_MT_PRESSURE, field,
 368                                 cls->sn_pressure);
 369                         /* touchscreen emulation */
 370                         set_abs(hi->input, ABS_PRESSURE, field,
 371                                 cls->sn_pressure);
 372                         if (td->last_mt_collection == usage->collection_index) {
 373                                 td->last_slot_field = usage->hid;
 374                                 td->last_field_index = field->index;
 375                         }
 376                         return 1;
 377                 case HID_DG_CONTACTCOUNT:
 378                         if (td->last_mt_collection == usage->collection_index)
 379                                 td->last_field_index = field->index;
 380                         return 1;
 381                 case HID_DG_CONTACTMAX:
 382                         /* we don't set td->last_slot_field as contactcount and
 383                          * contact max are global to the report */
 384                         if (td->last_mt_collection == usage->collection_index)
 385                                 td->last_field_index = field->index;
 386                         return -1;
 387                 }
 388                 /* let hid-input decide for the others */
 389                 return 0;
 390
 391         case 0xff000000:
 392                 /* we do not want to map these: no input-oriented meaning */
 393                 return -1;
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi,
 400                 struct hid_field *field, struct hid_usage *usage,
 401                 unsigned long **bit, int *max)
 402 {
 403         if (usage->type == EV_KEY || usage->type == EV_ABS)
 404                 set_bit(usage->type, hi->input->evbit);
 405
 406         return -1;
 407 }
 408
 409 static int mt_compute_slot(struct mt_device *td)
 410 {
 411         __s32 quirks = td->mtclass.quirks;
 412
 413         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID)
 414                 return td->curdata.contactid;
 415
 416         if (quirks & MT_QUIRK_CYPRESS)
 417                 return cypress_compute_slot(td);
 418
 419         if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER)
 420                 return td->num_received;
 421
 422         if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE)
 423                 return td->curdata.contactid - 1;
 424
 425         return find_slot_from_contactid(td);
 426 }
 427
 428 /*
 429  * this function is called when a whole contact has been processed,
 430  * so that it can assign it to a slot and store the data there
 431  */
 432 static void mt_complete_slot(struct mt_device *td)
 433 {
 434         td->curdata.seen_in_this_frame = true;
 435         if (td->curvalid) {
 436                 int slotnum = mt_compute_slot(td);
 437
 438                 if (slotnum >= 0 && slotnum < td->maxcontacts)
 439                         td->slots[slotnum] = td->curdata;
 440         }
 441         td->num_received++;
 442 }
 443
 444
 445 /*
 446  * this function is called when a whole packet has been received and processed,
 447  * so that it can decide what to send to the input layer.
 448  */
 449 static void mt_emit_event(struct mt_device *td, struct input_dev *input)
 450 {
 451         int i;
 452
 453         for (i = 0; i < td->maxcontacts; ++i) {
 454                 struct mt_slot *s = &(td->slots[i]);
 455                 if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) &&
 456                         !s->seen_in_this_frame) {
 457                         s->touch_state = false;
 458                 }
 459
 460                 input_mt_slot(input, i);
 461                 input_mt_report_slot_state(input, MT_TOOL_FINGER,
 462                         s->touch_state);
 463                 if (s->touch_state) {
 464                         /* this finger is on the screen */
 465                         int wide = (s->w > s->h);
 466                         /* divided by two to match visual scale of touch */
 467                         int major = max(s->w, s->h) >> 1;
 468                         int minor = min(s->w, s->h) >> 1;
 469
 470                         input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x);
 471                         input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y);
 472                         input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide);
 473                         input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p);
 474                         input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major);
 475                         input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor);
 476                 }
 477                 s->seen_in_this_frame = false;
 478
 479         }
 480
 481         input_mt_report_pointer_emulation(input, true);
 482         input_sync(input);
 483         td->num_received = 0;
 484 }
 485
 486
 487
 488 static int mt_event(struct hid_device *hid, struct hid_field *field,
 489                                 struct hid_usage *usage, __s32 value)
 490 {
 491         struct mt_device *td = hid_get_drvdata(hid);
 492         __s32 quirks = td->mtclass.quirks;
 493
 494         if (hid->claimed & HID_CLAIMED_INPUT && td->slots) {
 495                 switch (usage->hid) {
 496                 case HID_DG_INRANGE:
 497                         if (quirks & MT_QUIRK_ALWAYS_VALID)
 498                                 td->curvalid = true;
 499                         else if (quirks & MT_QUIRK_VALID_IS_INRANGE)
 500                                 td->curvalid = value;
 501                         break;
 502                 case HID_DG_TIPSWITCH:
 503                         if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP)
 504                                 td->curvalid = value;
 505                         td->curdata.touch_state = value;
 506                         break;
 507                 case HID_DG_CONFIDENCE:
 508                         if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE)
 509                                 td->curvalid = value;
 510                         break;
 511                 case HID_DG_CONTACTID:
 512                         td->curdata.contactid = value;
 513                         break;
 514                 case HID_DG_TIPPRESSURE:
 515                         td->curdata.p = value;
 516                         break;
 517                 case HID_GD_X:
 518                         td->curdata.x = value;
 519                         break;
 520                 case HID_GD_Y:
 521                         td->curdata.y = value;
 522                         break;
 523                 case HID_DG_WIDTH:
 524                         td->curdata.w = value;
 525                         break;
 526                 case HID_DG_HEIGHT:
 527                         td->curdata.h = value;
 528                         break;
 529                 case HID_DG_CONTACTCOUNT:
 530                         /*
 531                          * Includes multi-packet support where subsequent
 532                          * packets are sent with zero contactcount.
 533                          */
 534                         if (value)
 535                                 td->num_expected = value;
 536                         break;
 537
 538                 default:
 539                         /* fallback to the generic hidinput handling */
 540                         return 0;
 541                 }
 542
 543                 if (usage->hid == td->last_slot_field) {
 544                         mt_complete_slot(td);
 545                 }
 546
 547                 if (field->index == td->last_field_index
 548                         && td->num_received >= td->num_expected)
 549                         mt_emit_event(td, field->hidinput->input);
 550
 551         }
 552
 553         /* we have handled the hidinput part, now remains hiddev */
 554         if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event)
 555                 hid->hiddev_hid_event(hid, field, usage, value);
 556
 557         return 1;
 558 }
 559
 560 static void mt_set_input_mode(struct hid_device *hdev)
 561 {
 562         struct mt_device *td = hid_get_drvdata(hdev);
 563         struct hid_report *r;
 564         struct hid_report_enum *re;
 565
 566         if (td->inputmode < 0)
 567                 return;
 568
 569         re = &(hdev->report_enum[HID_FEATURE_REPORT]);
 570         r = re->report_id_hash[td->inputmode];
 571         if (r) {
 572                 r->field[0]->value[0] = 0x02;
 573                 usbhid_submit_report(hdev, r, USB_DIR_OUT);
 574         }
 575 }
 576
 577 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
 578 {
 579         int ret, i;
 580         struct mt_device *td;
 581         struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */
 582
 583         for (i = 0; mt_classes[i].name ; i++) {
 584                 if (id->driver_data == mt_classes[i].name) {
 585                         mtclass = &(mt_classes[i]);
 586                         break;
 587                 }
 588         }
 589
 590         /* This allows the driver to correctly support devices
 591          * that emit events over several HID messages.
 592          */
 593         hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
 594
 595         td = kzalloc(sizeof(struct mt_device), GFP_KERNEL);
 596         if (!td) {
 597                 dev_err(&hdev->dev, "cannot allocate multitouch data\n");
 598                 return -ENOMEM;
 599         }
 600         td->mtclass = *mtclass;
 601         td->inputmode = -1;
 602         td->last_mt_collection = -1;
 603         hid_set_drvdata(hdev, td);
 604
 605         ret = hid_parse(hdev);
 606         if (ret != 0)
 607                 goto fail;
 608
 609         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
 610         if (ret)
 611                 goto fail;
 612
 613         td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot),
 614                                 GFP_KERNEL);
 615         if (!td->slots) {
 616                 dev_err(&hdev->dev, "cannot allocate multitouch slots\n");
 617                 hid_hw_stop(hdev);
 618                 ret = -ENOMEM;
 619                 goto fail;
 620         }
 621
 622         ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group);
 623
 624         mt_set_input_mode(hdev);
 625
 626         return 0;
 627
 628 fail:
 629         kfree(td);
 630         return ret;
 631 }
 632
 633 #ifdef CONFIG_PM
 634 static int mt_reset_resume(struct hid_device *hdev)
 635 {
 636         mt_set_input_mode(hdev);
 637         return 0;
 638 }
 639 #endif
 640
 641 static void mt_remove(struct hid_device *hdev)
 642 {
 643         struct mt_device *td = hid_get_drvdata(hdev);
 644         sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group);
 645         hid_hw_stop(hdev);
 646         kfree(td->slots);
 647         kfree(td);
 648         hid_set_drvdata(hdev, NULL);
 649 }
 650
 651 static const struct hid_device_id mt_devices[] = {
 652
 653         /* 3M panels */
 654         { .driver_data = MT_CLS_3M,
 655                 HID_USB_DEVICE(USB_VENDOR_ID_3M,
 656                         USB_DEVICE_ID_3M1968) },
 657         { .driver_data = MT_CLS_3M,
 658                 HID_USB_DEVICE(USB_VENDOR_ID_3M,
 659                         USB_DEVICE_ID_3M2256) },
 660
 661         /* ActionStar panels */
 662         { .driver_data = MT_CLS_DEFAULT,
 663                 HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR,
 664                         USB_DEVICE_ID_ACTIONSTAR_1011) },
 665
 666         /* Cando panels */
 667         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 668                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
 669                         USB_DEVICE_ID_CANDO_MULTI_TOUCH) },
 670         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 671                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
 672                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) },
 673         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 674                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
 675                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) },
 676         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 677                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
 678                         USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) },
 679
 680         /* Chunghwa Telecom touch panels */
 681         {  .driver_data = MT_CLS_DEFAULT,
 682                 HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT,
 683                         USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) },
 684
 685         /* CVTouch panels */
 686         { .driver_data = MT_CLS_DEFAULT,
 687                 HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH,
 688                         USB_DEVICE_ID_CVTOUCH_SCREEN) },
 689
 690         /* Cypress panel */
 691         { .driver_data = MT_CLS_CYPRESS,
 692                 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS,
 693                         USB_DEVICE_ID_CYPRESS_TRUETOUCH) },
 694
 695         /* eGalax devices (resistive) */
 696         { .driver_data = MT_CLS_EGALAX,
 697                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 698                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) },
 699         { .driver_data = MT_CLS_EGALAX,
 700                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 701                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) },
 702
 703         /* eGalax devices (capacitive) */
 704         { .driver_data = MT_CLS_EGALAX,
 705                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 706                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) },
 707         { .driver_data = MT_CLS_EGALAX,
 708                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 709                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) },
 710         { .driver_data = MT_CLS_EGALAX,
 711                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 712                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) },
 713         { .driver_data = MT_CLS_EGALAX,
 714                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 715                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) },
 716         { .driver_data = MT_CLS_EGALAX,
 717                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 718                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) },
 719         { .driver_data = MT_CLS_EGALAX_SERIAL,
 720                 HID_USB_DEVICE(USB_VENDOR_ID_DWAV,
 721                         USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) },
 722
 723         /* Elo TouchSystems IntelliTouch Plus panel */
 724         { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID,
 725                 HID_USB_DEVICE(USB_VENDOR_ID_ELO,
 726                         USB_DEVICE_ID_ELO_TS2515) },
 727
 728         /* GeneralTouch panel */
 729         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER,
 730                 HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH,
 731                         USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) },
 732
 733         /* GoodTouch panels */
 734         { .driver_data = MT_CLS_DEFAULT,
 735                 HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH,
 736                         USB_DEVICE_ID_GOODTOUCH_000f) },
 737
 738         /* Hanvon panels */
 739         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 740                 HID_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT,
 741                         USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) },
 742
 743         /* Ideacom panel */
 744         { .driver_data = MT_CLS_SERIAL,
 745                 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM,
 746                         USB_DEVICE_ID_IDEACOM_IDC6650) },
 747
 748         /* Ilitek dual touch panel */
 749         {  .driver_data = MT_CLS_DEFAULT,
 750                 HID_USB_DEVICE(USB_VENDOR_ID_ILITEK,
 751                         USB_DEVICE_ID_ILITEK_MULTITOUCH) },
 752
 753         /* IRTOUCH panels */
 754         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 755                 HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS,
 756                         USB_DEVICE_ID_IRTOUCH_INFRARED_USB) },
 757
 758         /* LG Display panels */
 759         { .driver_data = MT_CLS_DEFAULT,
 760                 HID_USB_DEVICE(USB_VENDOR_ID_LG,
 761                         USB_DEVICE_ID_LG_MULTITOUCH) },
 762
 763         /* Lumio panels */
 764         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 765                 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 766                         USB_DEVICE_ID_CRYSTALTOUCH) },
 767         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 768                 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO,
 769                         USB_DEVICE_ID_CRYSTALTOUCH_DUAL) },
 770
 771         /* MosArt panels */
 772         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 773                 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
 774                         USB_DEVICE_ID_ASUS_T91MT)},
 775         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 776                 HID_USB_DEVICE(USB_VENDOR_ID_ASUS,
 777                         USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) },
 778         { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE,
 779                 HID_USB_DEVICE(USB_VENDOR_ID_TURBOX,
 780                         USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) },
 781
 782         /* PenMount panels */
 783         { .driver_data = MT_CLS_CONFIDENCE,
 784                 HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT,
 785                         USB_DEVICE_ID_PENMOUNT_PCI) },
 786
 787         /* PixCir-based panels */
 788         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 789                 HID_USB_DEVICE(USB_VENDOR_ID_HANVON,
 790                         USB_DEVICE_ID_HANVON_MULTITOUCH) },
 791         { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID,
 792                 HID_USB_DEVICE(USB_VENDOR_ID_CANDO,
 793                         USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) },
 794
 795         /* Quanta-based panels */
 796         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 797                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 798                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
 799         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 800                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 801                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
 802         { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
 803                 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
 804                         USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) },
 805
 806         /* Stantum panels */
 807         { .driver_data = MT_CLS_CONFIDENCE,
 808                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM,
 809                         USB_DEVICE_ID_MTP)},
 810         { .driver_data = MT_CLS_CONFIDENCE,
 811                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
 812                         USB_DEVICE_ID_MTP_STM)},
 813         { .driver_data = MT_CLS_CONFIDENCE,
 814                 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX,
 815                         USB_DEVICE_ID_MTP_SITRONIX)},
 816
 817         /* Touch International panels */
 818         { .driver_data = MT_CLS_DEFAULT,
 819                 HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL,
 820                         USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) },
 821
 822         /* Unitec panels */
 823         { .driver_data = MT_CLS_DEFAULT,
 824                 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
 825                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) },
 826         { .driver_data = MT_CLS_DEFAULT,
 827                 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC,
 828                         USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) },
 829         /* XAT */
 830         { .driver_data = MT_CLS_DEFAULT,
 831                 HID_USB_DEVICE(USB_VENDOR_ID_XAT,
 832                         USB_DEVICE_ID_XAT_CSR) },
 833
 834         { }
 835 };
 836 MODULE_DEVICE_TABLE(hid, mt_devices);
 837
 838 static const struct hid_usage_id mt_grabbed_usages[] = {
 839         { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
 840         { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1}
 841 };
 842
 843 static struct hid_driver mt_driver = {
 844         .name = "hid-multitouch",
 845         .id_table = mt_devices,
 846         .probe = mt_probe,
 847         .remove = mt_remove,
 848         .input_mapping = mt_input_mapping,
 849         .input_mapped = mt_input_mapped,
 850         .feature_mapping = mt_feature_mapping,
 851         .usage_table = mt_grabbed_usages,
 852         .event = mt_event,
 853 #ifdef CONFIG_PM
 854         .reset_resume = mt_reset_resume,
 855 #endif
 856 };
 857
 858 static int __init mt_init(void)
 859 {
 860         return hid_register_driver(&mt_driver);
 861 }
 862
 863 static void __exit mt_exit(void)
 864 {
 865         hid_unregister_driver(&mt_driver);
 866 }
 867
 868 module_init(mt_init);
 869 module_exit(mt_exit);