1 /* 2 * HID driver for multitouch panels 3 * 4 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> 5 * Copyright (c) 2010-2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> 6 * Copyright (c) 2010-2012 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 bool is_indirect; /* true for touchpads */ 71 }; 72 73 struct mt_device { 74 struct mt_slot curdata; /* placeholder of incoming data */ 75 struct mt_class mtclass; /* our mt device class */ 76 unsigned last_field_index; /* last field index of the report */ 77 unsigned last_slot_field; /* the last field of a slot */ 78 __s8 inputmode; /* InputMode HID feature, -1 if non-existent */ 79 __s8 maxcontact_report_id; /* Maximum Contact Number HID feature, 80 -1 if non-existent */ 81 __u8 num_received; /* how many contacts we received */ 82 __u8 num_expected; /* expected last contact index */ 83 __u8 maxcontacts; 84 __u8 touches_by_report; /* how many touches are present in one report: 85 * 1 means we should use a serial protocol 86 * > 1 means hybrid (multitouch) protocol */ 87 bool curvalid; /* is the current contact valid? */ 88 struct mt_slot *slots; 89 }; 90 91 /* classes of device behavior */ 92 #define MT_CLS_DEFAULT 0x0001 93 94 #define MT_CLS_SERIAL 0x0002 95 #define MT_CLS_CONFIDENCE 0x0003 96 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004 97 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005 98 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006 99 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007 100 #define MT_CLS_DUAL_NSMU_CONTACTID 0x0008 101 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009 102 103 /* vendor specific classes */ 104 #define MT_CLS_3M 0x0101 105 #define MT_CLS_CYPRESS 0x0102 106 #define MT_CLS_EGALAX 0x0103 107 #define MT_CLS_EGALAX_SERIAL 0x0104 108 #define MT_CLS_TOPSEED 0x0105 109 #define MT_CLS_PANASONIC 0x0106 110 111 #define MT_DEFAULT_MAXCONTACT 10 112 113 /* 114 * these device-dependent functions determine what slot corresponds 115 * to a valid contact that was just read. 116 */ 117 118 static int cypress_compute_slot(struct mt_device *td) 119 { 120 if (td->curdata.contactid != 0 || td->num_received == 0) 121 return td->curdata.contactid; 122 else 123 return -1; 124 } 125 126 static int find_slot_from_contactid(struct mt_device *td) 127 { 128 int i; 129 for (i = 0; i < td->maxcontacts; ++i) { 130 if (td->slots[i].contactid == td->curdata.contactid && 131 td->slots[i].touch_state) 132 return i; 133 } 134 for (i = 0; i < td->maxcontacts; ++i) { 135 if (!td->slots[i].seen_in_this_frame && 136 !td->slots[i].touch_state) 137 return i; 138 } 139 /* should not occurs. If this happens that means 140 * that the device sent more touches that it says 141 * in the report descriptor. It is ignored then. */ 142 return -1; 143 } 144 145 static struct mt_class mt_classes[] = { 146 { .name = MT_CLS_DEFAULT, 147 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP }, 148 { .name = MT_CLS_SERIAL, 149 .quirks = MT_QUIRK_ALWAYS_VALID}, 150 { .name = MT_CLS_CONFIDENCE, 151 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE }, 152 { .name = MT_CLS_CONFIDENCE_CONTACT_ID, 153 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 154 MT_QUIRK_SLOT_IS_CONTACTID }, 155 { .name = MT_CLS_CONFIDENCE_MINUS_ONE, 156 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 157 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE }, 158 { .name = MT_CLS_DUAL_INRANGE_CONTACTID, 159 .quirks = MT_QUIRK_VALID_IS_INRANGE | 160 MT_QUIRK_SLOT_IS_CONTACTID, 161 .maxcontacts = 2 }, 162 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 163 .quirks = MT_QUIRK_VALID_IS_INRANGE | 164 MT_QUIRK_SLOT_IS_CONTACTNUMBER, 165 .maxcontacts = 2 }, 166 { .name = MT_CLS_DUAL_NSMU_CONTACTID, 167 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 168 MT_QUIRK_SLOT_IS_CONTACTID, 169 .maxcontacts = 2 }, 170 { .name = MT_CLS_INRANGE_CONTACTNUMBER, 171 .quirks = MT_QUIRK_VALID_IS_INRANGE | 172 MT_QUIRK_SLOT_IS_CONTACTNUMBER }, 173 174 /* 175 * vendor specific classes 176 */ 177 { .name = MT_CLS_3M, 178 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 179 MT_QUIRK_SLOT_IS_CONTACTID, 180 .sn_move = 2048, 181 .sn_width = 128, 182 .sn_height = 128 }, 183 { .name = MT_CLS_CYPRESS, 184 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 185 MT_QUIRK_CYPRESS, 186 .maxcontacts = 10 }, 187 { .name = MT_CLS_EGALAX, 188 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 189 MT_QUIRK_VALID_IS_INRANGE, 190 .sn_move = 4096, 191 .sn_pressure = 32, 192 }, 193 { .name = MT_CLS_EGALAX_SERIAL, 194 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 195 MT_QUIRK_ALWAYS_VALID, 196 .sn_move = 4096, 197 .sn_pressure = 32, 198 }, 199 { .name = MT_CLS_TOPSEED, 200 .quirks = MT_QUIRK_ALWAYS_VALID, 201 .is_indirect = true, 202 .maxcontacts = 2, 203 }, 204 { .name = MT_CLS_PANASONIC, 205 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP, 206 .maxcontacts = 4 }, 207 208 { } 209 }; 210 211 static ssize_t mt_show_quirks(struct device *dev, 212 struct device_attribute *attr, 213 char *buf) 214 { 215 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 216 struct mt_device *td = hid_get_drvdata(hdev); 217 218 return sprintf(buf, "%u\n", td->mtclass.quirks); 219 } 220 221 static ssize_t mt_set_quirks(struct device *dev, 222 struct device_attribute *attr, 223 const char *buf, size_t count) 224 { 225 struct hid_device *hdev = container_of(dev, struct hid_device, dev); 226 struct mt_device *td = hid_get_drvdata(hdev); 227 228 unsigned long val; 229 230 if (kstrtoul(buf, 0, &val)) 231 return -EINVAL; 232 233 td->mtclass.quirks = val; 234 235 return count; 236 } 237 238 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks); 239 240 static struct attribute *sysfs_attrs[] = { 241 &dev_attr_quirks.attr, 242 NULL 243 }; 244 245 static struct attribute_group mt_attribute_group = { 246 .attrs = sysfs_attrs 247 }; 248 249 static void mt_feature_mapping(struct hid_device *hdev, 250 struct hid_field *field, struct hid_usage *usage) 251 { 252 struct mt_device *td = hid_get_drvdata(hdev); 253 254 switch (usage->hid) { 255 case HID_DG_INPUTMODE: 256 td->inputmode = field->report->id; 257 break; 258 case HID_DG_CONTACTMAX: 259 td->maxcontact_report_id = field->report->id; 260 td->maxcontacts = field->value[0]; 261 if (td->mtclass.maxcontacts) 262 /* check if the maxcontacts is given by the class */ 263 td->maxcontacts = td->mtclass.maxcontacts; 264 265 break; 266 } 267 } 268 269 static void set_abs(struct input_dev *input, unsigned int code, 270 struct hid_field *field, int snratio) 271 { 272 int fmin = field->logical_minimum; 273 int fmax = field->logical_maximum; 274 int fuzz = snratio ? (fmax - fmin) / snratio : 0; 275 input_set_abs_params(input, code, fmin, fmax, fuzz, 0); 276 } 277 278 static void set_last_slot_field(struct hid_usage *usage, struct mt_device *td, 279 struct hid_input *hi) 280 { 281 if (!test_bit(usage->hid, hi->input->absbit)) 282 td->last_slot_field = usage->hid; 283 } 284 285 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, 286 struct hid_field *field, struct hid_usage *usage, 287 unsigned long **bit, int *max) 288 { 289 struct mt_device *td = hid_get_drvdata(hdev); 290 struct mt_class *cls = &td->mtclass; 291 int code; 292 293 /* Only map fields from TouchScreen or TouchPad collections. 294 * We need to ignore fields that belong to other collections 295 * such as Mouse that might have the same GenericDesktop usages. */ 296 if (field->application == HID_DG_TOUCHSCREEN) 297 set_bit(INPUT_PROP_DIRECT, hi->input->propbit); 298 else if (field->application != HID_DG_TOUCHPAD) 299 return 0; 300 301 /* In case of an indirect device (touchpad), we need to add 302 * specific BTN_TOOL_* to be handled by the synaptics xorg 303 * driver. 304 * We also consider that touchscreens providing buttons are touchpads. 305 */ 306 if (field->application == HID_DG_TOUCHPAD || 307 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON || 308 cls->is_indirect) { 309 set_bit(INPUT_PROP_POINTER, hi->input->propbit); 310 set_bit(BTN_TOOL_FINGER, hi->input->keybit); 311 set_bit(BTN_TOOL_DOUBLETAP, hi->input->keybit); 312 set_bit(BTN_TOOL_TRIPLETAP, hi->input->keybit); 313 set_bit(BTN_TOOL_QUADTAP, hi->input->keybit); 314 } 315 316 /* eGalax devices provide a Digitizer.Stylus input which overrides 317 * the correct Digitizers.Finger X/Y ranges. 318 * Let's just ignore this input. */ 319 if (field->physical == HID_DG_STYLUS) 320 return -1; 321 322 switch (usage->hid & HID_USAGE_PAGE) { 323 324 case HID_UP_GENDESK: 325 switch (usage->hid) { 326 case HID_GD_X: 327 hid_map_usage(hi, usage, bit, max, 328 EV_ABS, ABS_MT_POSITION_X); 329 set_abs(hi->input, ABS_MT_POSITION_X, field, 330 cls->sn_move); 331 /* touchscreen emulation */ 332 set_abs(hi->input, ABS_X, field, cls->sn_move); 333 set_last_slot_field(usage, td, hi); 334 td->last_field_index = field->index; 335 return 1; 336 case HID_GD_Y: 337 hid_map_usage(hi, usage, bit, max, 338 EV_ABS, ABS_MT_POSITION_Y); 339 set_abs(hi->input, ABS_MT_POSITION_Y, field, 340 cls->sn_move); 341 /* touchscreen emulation */ 342 set_abs(hi->input, ABS_Y, field, cls->sn_move); 343 set_last_slot_field(usage, td, hi); 344 td->last_field_index = field->index; 345 return 1; 346 } 347 return 0; 348 349 case HID_UP_DIGITIZER: 350 switch (usage->hid) { 351 case HID_DG_INRANGE: 352 set_last_slot_field(usage, td, hi); 353 td->last_field_index = field->index; 354 return 1; 355 case HID_DG_CONFIDENCE: 356 set_last_slot_field(usage, td, hi); 357 td->last_field_index = field->index; 358 return 1; 359 case HID_DG_TIPSWITCH: 360 hid_map_usage(hi, usage, bit, max, EV_KEY, BTN_TOUCH); 361 input_set_capability(hi->input, EV_KEY, BTN_TOUCH); 362 set_last_slot_field(usage, td, hi); 363 td->last_field_index = field->index; 364 return 1; 365 case HID_DG_CONTACTID: 366 if (!td->maxcontacts) 367 td->maxcontacts = MT_DEFAULT_MAXCONTACT; 368 input_mt_init_slots(hi->input, td->maxcontacts); 369 td->last_slot_field = usage->hid; 370 td->last_field_index = field->index; 371 td->touches_by_report++; 372 return 1; 373 case HID_DG_WIDTH: 374 hid_map_usage(hi, usage, bit, max, 375 EV_ABS, ABS_MT_TOUCH_MAJOR); 376 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field, 377 cls->sn_width); 378 set_last_slot_field(usage, td, hi); 379 td->last_field_index = field->index; 380 return 1; 381 case HID_DG_HEIGHT: 382 hid_map_usage(hi, usage, bit, max, 383 EV_ABS, ABS_MT_TOUCH_MINOR); 384 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field, 385 cls->sn_height); 386 input_set_abs_params(hi->input, 387 ABS_MT_ORIENTATION, 0, 1, 0, 0); 388 set_last_slot_field(usage, td, hi); 389 td->last_field_index = field->index; 390 return 1; 391 case HID_DG_TIPPRESSURE: 392 hid_map_usage(hi, usage, bit, max, 393 EV_ABS, ABS_MT_PRESSURE); 394 set_abs(hi->input, ABS_MT_PRESSURE, field, 395 cls->sn_pressure); 396 /* touchscreen emulation */ 397 set_abs(hi->input, ABS_PRESSURE, field, 398 cls->sn_pressure); 399 set_last_slot_field(usage, td, hi); 400 td->last_field_index = field->index; 401 return 1; 402 case HID_DG_CONTACTCOUNT: 403 td->last_field_index = field->index; 404 return 1; 405 case HID_DG_CONTACTMAX: 406 /* we don't set td->last_slot_field as contactcount and 407 * contact max are global to the report */ 408 td->last_field_index = field->index; 409 return -1; 410 } 411 case HID_DG_TOUCH: 412 /* Legacy devices use TIPSWITCH and not TOUCH. 413 * Let's just ignore this field. */ 414 return -1; 415 /* let hid-input decide for the others */ 416 return 0; 417 418 case HID_UP_BUTTON: 419 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE); 420 hid_map_usage(hi, usage, bit, max, EV_KEY, code); 421 input_set_capability(hi->input, EV_KEY, code); 422 return 1; 423 424 case 0xff000000: 425 /* we do not want to map these: no input-oriented meaning */ 426 return -1; 427 } 428 429 return 0; 430 } 431 432 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi, 433 struct hid_field *field, struct hid_usage *usage, 434 unsigned long **bit, int *max) 435 { 436 if (usage->type == EV_KEY || usage->type == EV_ABS) 437 set_bit(usage->type, hi->input->evbit); 438 439 return -1; 440 } 441 442 static int mt_compute_slot(struct mt_device *td) 443 { 444 __s32 quirks = td->mtclass.quirks; 445 446 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID) 447 return td->curdata.contactid; 448 449 if (quirks & MT_QUIRK_CYPRESS) 450 return cypress_compute_slot(td); 451 452 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER) 453 return td->num_received; 454 455 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE) 456 return td->curdata.contactid - 1; 457 458 return find_slot_from_contactid(td); 459 } 460 461 /* 462 * this function is called when a whole contact has been processed, 463 * so that it can assign it to a slot and store the data there 464 */ 465 static void mt_complete_slot(struct mt_device *td) 466 { 467 td->curdata.seen_in_this_frame = true; 468 if (td->curvalid) { 469 int slotnum = mt_compute_slot(td); 470 471 if (slotnum >= 0 && slotnum < td->maxcontacts) 472 td->slots[slotnum] = td->curdata; 473 } 474 td->num_received++; 475 } 476 477 478 /* 479 * this function is called when a whole packet has been received and processed, 480 * so that it can decide what to send to the input layer. 481 */ 482 static void mt_emit_event(struct mt_device *td, struct input_dev *input) 483 { 484 int i; 485 486 for (i = 0; i < td->maxcontacts; ++i) { 487 struct mt_slot *s = &(td->slots[i]); 488 if ((td->mtclass.quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) && 489 !s->seen_in_this_frame) { 490 s->touch_state = false; 491 } 492 493 input_mt_slot(input, i); 494 input_mt_report_slot_state(input, MT_TOOL_FINGER, 495 s->touch_state); 496 if (s->touch_state) { 497 /* this finger is on the screen */ 498 int wide = (s->w > s->h); 499 /* divided by two to match visual scale of touch */ 500 int major = max(s->w, s->h) >> 1; 501 int minor = min(s->w, s->h) >> 1; 502 503 input_event(input, EV_ABS, ABS_MT_POSITION_X, s->x); 504 input_event(input, EV_ABS, ABS_MT_POSITION_Y, s->y); 505 input_event(input, EV_ABS, ABS_MT_ORIENTATION, wide); 506 input_event(input, EV_ABS, ABS_MT_PRESSURE, s->p); 507 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); 508 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); 509 } 510 s->seen_in_this_frame = false; 511 512 } 513 514 input_mt_report_pointer_emulation(input, true); 515 input_sync(input); 516 td->num_received = 0; 517 } 518 519 520 521 static int mt_event(struct hid_device *hid, struct hid_field *field, 522 struct hid_usage *usage, __s32 value) 523 { 524 struct mt_device *td = hid_get_drvdata(hid); 525 __s32 quirks = td->mtclass.quirks; 526 527 if (hid->claimed & HID_CLAIMED_INPUT && td->slots) { 528 switch (usage->hid) { 529 case HID_DG_INRANGE: 530 if (quirks & MT_QUIRK_ALWAYS_VALID) 531 td->curvalid = true; 532 else if (quirks & MT_QUIRK_VALID_IS_INRANGE) 533 td->curvalid = value; 534 break; 535 case HID_DG_TIPSWITCH: 536 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) 537 td->curvalid = value; 538 td->curdata.touch_state = value; 539 break; 540 case HID_DG_CONFIDENCE: 541 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE) 542 td->curvalid = value; 543 break; 544 case HID_DG_CONTACTID: 545 td->curdata.contactid = value; 546 break; 547 case HID_DG_TIPPRESSURE: 548 td->curdata.p = value; 549 break; 550 case HID_GD_X: 551 td->curdata.x = value; 552 break; 553 case HID_GD_Y: 554 td->curdata.y = value; 555 break; 556 case HID_DG_WIDTH: 557 td->curdata.w = value; 558 break; 559 case HID_DG_HEIGHT: 560 td->curdata.h = value; 561 break; 562 case HID_DG_CONTACTCOUNT: 563 /* 564 * Includes multi-packet support where subsequent 565 * packets are sent with zero contactcount. 566 */ 567 if (value) 568 td->num_expected = value; 569 break; 570 case HID_DG_TOUCH: 571 /* do nothing */ 572 break; 573 574 default: 575 /* fallback to the generic hidinput handling */ 576 return 0; 577 } 578 579 if (usage->hid == td->last_slot_field) 580 mt_complete_slot(td); 581 582 if (field->index == td->last_field_index 583 && td->num_received >= td->num_expected) 584 mt_emit_event(td, field->hidinput->input); 585 586 } 587 588 /* we have handled the hidinput part, now remains hiddev */ 589 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event) 590 hid->hiddev_hid_event(hid, field, usage, value); 591 592 return 1; 593 } 594 595 static void mt_set_input_mode(struct hid_device *hdev) 596 { 597 struct mt_device *td = hid_get_drvdata(hdev); 598 struct hid_report *r; 599 struct hid_report_enum *re; 600 601 if (td->inputmode < 0) 602 return; 603 604 re = &(hdev->report_enum[HID_FEATURE_REPORT]); 605 r = re->report_id_hash[td->inputmode]; 606 if (r) { 607 r->field[0]->value[0] = 0x02; 608 usbhid_submit_report(hdev, r, USB_DIR_OUT); 609 } 610 } 611 612 static void mt_set_maxcontacts(struct hid_device *hdev) 613 { 614 struct mt_device *td = hid_get_drvdata(hdev); 615 struct hid_report *r; 616 struct hid_report_enum *re; 617 int fieldmax, max; 618 619 if (td->maxcontact_report_id < 0) 620 return; 621 622 if (!td->mtclass.maxcontacts) 623 return; 624 625 re = &hdev->report_enum[HID_FEATURE_REPORT]; 626 r = re->report_id_hash[td->maxcontact_report_id]; 627 if (r) { 628 max = td->mtclass.maxcontacts; 629 fieldmax = r->field[0]->logical_maximum; 630 max = min(fieldmax, max); 631 if (r->field[0]->value[0] != max) { 632 r->field[0]->value[0] = max; 633 usbhid_submit_report(hdev, r, USB_DIR_OUT); 634 } 635 } 636 } 637 638 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) 639 { 640 int ret, i; 641 struct mt_device *td; 642 struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */ 643 644 if (id) { 645 for (i = 0; mt_classes[i].name ; i++) { 646 if (id->driver_data == mt_classes[i].name) { 647 mtclass = &(mt_classes[i]); 648 break; 649 } 650 } 651 } 652 653 /* This allows the driver to correctly support devices 654 * that emit events over several HID messages. 655 */ 656 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; 657 hdev->quirks &= ~HID_QUIRK_MULTITOUCH; 658 659 td = kzalloc(sizeof(struct mt_device), GFP_KERNEL); 660 if (!td) { 661 dev_err(&hdev->dev, "cannot allocate multitouch data\n"); 662 return -ENOMEM; 663 } 664 td->mtclass = *mtclass; 665 td->inputmode = -1; 666 td->maxcontact_report_id = -1; 667 hid_set_drvdata(hdev, td); 668 669 ret = hid_parse(hdev); 670 if (ret != 0) 671 goto fail; 672 673 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 674 if (ret) 675 goto fail; 676 677 if (!id && td->touches_by_report == 1) { 678 /* the device has been sent by hid-generic */ 679 mtclass = &td->mtclass; 680 mtclass->quirks |= MT_QUIRK_ALWAYS_VALID; 681 mtclass->quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP; 682 mtclass->quirks &= ~MT_QUIRK_VALID_IS_INRANGE; 683 mtclass->quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE; 684 } 685 686 td->slots = kzalloc(td->maxcontacts * sizeof(struct mt_slot), 687 GFP_KERNEL); 688 if (!td->slots) { 689 dev_err(&hdev->dev, "cannot allocate multitouch slots\n"); 690 hid_hw_stop(hdev); 691 ret = -ENOMEM; 692 goto fail; 693 } 694 695 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group); 696 697 mt_set_maxcontacts(hdev); 698 mt_set_input_mode(hdev); 699 700 return 0; 701 702 fail: 703 kfree(td); 704 return ret; 705 } 706 707 #ifdef CONFIG_PM 708 static int mt_reset_resume(struct hid_device *hdev) 709 { 710 mt_set_maxcontacts(hdev); 711 mt_set_input_mode(hdev); 712 return 0; 713 } 714 #endif 715 716 static void mt_remove(struct hid_device *hdev) 717 { 718 struct mt_device *td = hid_get_drvdata(hdev); 719 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group); 720 hid_hw_stop(hdev); 721 kfree(td->slots); 722 kfree(td); 723 hid_set_drvdata(hdev, NULL); 724 } 725 726 static const struct hid_device_id mt_devices[] = { 727 728 /* 3M panels */ 729 { .driver_data = MT_CLS_3M, 730 HID_USB_DEVICE(USB_VENDOR_ID_3M, 731 USB_DEVICE_ID_3M1968) }, 732 { .driver_data = MT_CLS_3M, 733 HID_USB_DEVICE(USB_VENDOR_ID_3M, 734 USB_DEVICE_ID_3M2256) }, 735 { .driver_data = MT_CLS_3M, 736 HID_USB_DEVICE(USB_VENDOR_ID_3M, 737 USB_DEVICE_ID_3M3266) }, 738 739 /* ActionStar panels */ 740 { .driver_data = MT_CLS_DEFAULT, 741 HID_USB_DEVICE(USB_VENDOR_ID_ACTIONSTAR, 742 USB_DEVICE_ID_ACTIONSTAR_1011) }, 743 744 /* Atmel panels */ 745 { .driver_data = MT_CLS_SERIAL, 746 HID_USB_DEVICE(USB_VENDOR_ID_ATMEL, 747 USB_DEVICE_ID_ATMEL_MULTITOUCH) }, 748 { .driver_data = MT_CLS_SERIAL, 749 HID_USB_DEVICE(USB_VENDOR_ID_ATMEL, 750 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) }, 751 752 /* Cando panels */ 753 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 754 HID_USB_DEVICE(USB_VENDOR_ID_CANDO, 755 USB_DEVICE_ID_CANDO_MULTI_TOUCH) }, 756 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 757 HID_USB_DEVICE(USB_VENDOR_ID_CANDO, 758 USB_DEVICE_ID_CANDO_MULTI_TOUCH_10_1) }, 759 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 760 HID_USB_DEVICE(USB_VENDOR_ID_CANDO, 761 USB_DEVICE_ID_CANDO_MULTI_TOUCH_11_6) }, 762 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 763 HID_USB_DEVICE(USB_VENDOR_ID_CANDO, 764 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) }, 765 766 /* Chunghwa Telecom touch panels */ 767 { .driver_data = MT_CLS_DEFAULT, 768 HID_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT, 769 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) }, 770 771 /* CVTouch panels */ 772 { .driver_data = MT_CLS_DEFAULT, 773 HID_USB_DEVICE(USB_VENDOR_ID_CVTOUCH, 774 USB_DEVICE_ID_CVTOUCH_SCREEN) }, 775 776 /* Cypress panel */ 777 { .driver_data = MT_CLS_CYPRESS, 778 HID_USB_DEVICE(USB_VENDOR_ID_CYPRESS, 779 USB_DEVICE_ID_CYPRESS_TRUETOUCH) }, 780 781 /* eGalax devices (resistive) */ 782 { .driver_data = MT_CLS_EGALAX, 783 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 784 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) }, 785 { .driver_data = MT_CLS_EGALAX, 786 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 787 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) }, 788 789 /* eGalax devices (capacitive) */ 790 { .driver_data = MT_CLS_EGALAX, 791 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 792 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) }, 793 { .driver_data = MT_CLS_EGALAX_SERIAL, 794 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 795 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) }, 796 { .driver_data = MT_CLS_EGALAX_SERIAL, 797 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 798 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) }, 799 { .driver_data = MT_CLS_EGALAX_SERIAL, 800 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 801 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) }, 802 { .driver_data = MT_CLS_EGALAX_SERIAL, 803 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 804 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) }, 805 { .driver_data = MT_CLS_EGALAX, 806 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 807 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) }, 808 { .driver_data = MT_CLS_EGALAX_SERIAL, 809 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 810 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) }, 811 { .driver_data = MT_CLS_EGALAX, 812 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 813 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) }, 814 { .driver_data = MT_CLS_EGALAX_SERIAL, 815 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 816 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) }, 817 { .driver_data = MT_CLS_EGALAX, 818 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 819 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) }, 820 { .driver_data = MT_CLS_EGALAX, 821 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 822 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) }, 823 { .driver_data = MT_CLS_EGALAX_SERIAL, 824 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 825 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) }, 826 { .driver_data = MT_CLS_EGALAX_SERIAL, 827 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 828 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) }, 829 830 /* Elo TouchSystems IntelliTouch Plus panel */ 831 { .driver_data = MT_CLS_DUAL_NSMU_CONTACTID, 832 HID_USB_DEVICE(USB_VENDOR_ID_ELO, 833 USB_DEVICE_ID_ELO_TS2515) }, 834 835 /* GeneralTouch panel */ 836 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 837 HID_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 838 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) }, 839 840 /* Gametel game controller */ 841 { .driver_data = MT_CLS_DEFAULT, 842 HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_FRUCTEL, 843 USB_DEVICE_ID_GAMETEL_MT_MODE) }, 844 845 /* GoodTouch panels */ 846 { .driver_data = MT_CLS_DEFAULT, 847 HID_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH, 848 USB_DEVICE_ID_GOODTOUCH_000f) }, 849 850 /* Hanvon panels */ 851 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 852 HID_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT, 853 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) }, 854 855 /* Ideacom panel */ 856 { .driver_data = MT_CLS_SERIAL, 857 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM, 858 USB_DEVICE_ID_IDEACOM_IDC6650) }, 859 { .driver_data = MT_CLS_SERIAL, 860 HID_USB_DEVICE(USB_VENDOR_ID_IDEACOM, 861 USB_DEVICE_ID_IDEACOM_IDC6651) }, 862 863 /* Ilitek dual touch panel */ 864 { .driver_data = MT_CLS_DEFAULT, 865 HID_USB_DEVICE(USB_VENDOR_ID_ILITEK, 866 USB_DEVICE_ID_ILITEK_MULTITOUCH) }, 867 868 /* IRTOUCH panels */ 869 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 870 HID_USB_DEVICE(USB_VENDOR_ID_IRTOUCHSYSTEMS, 871 USB_DEVICE_ID_IRTOUCH_INFRARED_USB) }, 872 873 /* LG Display panels */ 874 { .driver_data = MT_CLS_DEFAULT, 875 HID_USB_DEVICE(USB_VENDOR_ID_LG, 876 USB_DEVICE_ID_LG_MULTITOUCH) }, 877 878 /* Lumio panels */ 879 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 880 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, 881 USB_DEVICE_ID_CRYSTALTOUCH) }, 882 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 883 HID_USB_DEVICE(USB_VENDOR_ID_LUMIO, 884 USB_DEVICE_ID_CRYSTALTOUCH_DUAL) }, 885 886 /* MosArt panels */ 887 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 888 HID_USB_DEVICE(USB_VENDOR_ID_ASUS, 889 USB_DEVICE_ID_ASUS_T91MT)}, 890 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 891 HID_USB_DEVICE(USB_VENDOR_ID_ASUS, 892 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) }, 893 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 894 HID_USB_DEVICE(USB_VENDOR_ID_TURBOX, 895 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) }, 896 897 /* Panasonic panels */ 898 { .driver_data = MT_CLS_PANASONIC, 899 HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 900 USB_DEVICE_ID_PANABOARD_UBT780) }, 901 { .driver_data = MT_CLS_PANASONIC, 902 HID_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 903 USB_DEVICE_ID_PANABOARD_UBT880) }, 904 905 /* PenMount panels */ 906 { .driver_data = MT_CLS_CONFIDENCE, 907 HID_USB_DEVICE(USB_VENDOR_ID_PENMOUNT, 908 USB_DEVICE_ID_PENMOUNT_PCI) }, 909 910 /* PixArt optical touch screen */ 911 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 912 HID_USB_DEVICE(USB_VENDOR_ID_PIXART, 913 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) }, 914 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 915 HID_USB_DEVICE(USB_VENDOR_ID_PIXART, 916 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) }, 917 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 918 HID_USB_DEVICE(USB_VENDOR_ID_PIXART, 919 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) }, 920 921 /* PixCir-based panels */ 922 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 923 HID_USB_DEVICE(USB_VENDOR_ID_HANVON, 924 USB_DEVICE_ID_HANVON_MULTITOUCH) }, 925 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 926 HID_USB_DEVICE(USB_VENDOR_ID_CANDO, 927 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) }, 928 929 /* Quanta-based panels */ 930 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID, 931 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, 932 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) }, 933 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID, 934 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, 935 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) }, 936 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID, 937 HID_USB_DEVICE(USB_VENDOR_ID_QUANTA, 938 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3008) }, 939 940 /* Stantum panels */ 941 { .driver_data = MT_CLS_CONFIDENCE, 942 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM, 943 USB_DEVICE_ID_MTP)}, 944 { .driver_data = MT_CLS_CONFIDENCE, 945 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, 946 USB_DEVICE_ID_MTP_STM)}, 947 { .driver_data = MT_CLS_CONFIDENCE, 948 HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_SITRONIX, 949 USB_DEVICE_ID_MTP_SITRONIX)}, 950 951 /* TopSeed panels */ 952 { .driver_data = MT_CLS_TOPSEED, 953 HID_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, 954 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) }, 955 956 /* Touch International panels */ 957 { .driver_data = MT_CLS_DEFAULT, 958 HID_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL, 959 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) }, 960 961 /* Unitec panels */ 962 { .driver_data = MT_CLS_DEFAULT, 963 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, 964 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) }, 965 { .driver_data = MT_CLS_DEFAULT, 966 HID_USB_DEVICE(USB_VENDOR_ID_UNITEC, 967 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) }, 968 /* XAT */ 969 { .driver_data = MT_CLS_DEFAULT, 970 HID_USB_DEVICE(USB_VENDOR_ID_XAT, 971 USB_DEVICE_ID_XAT_CSR) }, 972 973 /* Xiroku */ 974 { .driver_data = MT_CLS_DEFAULT, 975 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 976 USB_DEVICE_ID_XIROKU_SPX) }, 977 { .driver_data = MT_CLS_DEFAULT, 978 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 979 USB_DEVICE_ID_XIROKU_MPX) }, 980 { .driver_data = MT_CLS_DEFAULT, 981 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 982 USB_DEVICE_ID_XIROKU_CSR) }, 983 { .driver_data = MT_CLS_DEFAULT, 984 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 985 USB_DEVICE_ID_XIROKU_SPX1) }, 986 { .driver_data = MT_CLS_DEFAULT, 987 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 988 USB_DEVICE_ID_XIROKU_MPX1) }, 989 { .driver_data = MT_CLS_DEFAULT, 990 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 991 USB_DEVICE_ID_XIROKU_CSR1) }, 992 { .driver_data = MT_CLS_DEFAULT, 993 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 994 USB_DEVICE_ID_XIROKU_SPX2) }, 995 { .driver_data = MT_CLS_DEFAULT, 996 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 997 USB_DEVICE_ID_XIROKU_MPX2) }, 998 { .driver_data = MT_CLS_DEFAULT, 999 HID_USB_DEVICE(USB_VENDOR_ID_XIROKU, 1000 USB_DEVICE_ID_XIROKU_CSR2) }, 1001 1002 { } 1003 }; 1004 MODULE_DEVICE_TABLE(hid, mt_devices); 1005 1006 static const struct hid_usage_id mt_grabbed_usages[] = { 1007 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, 1008 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} 1009 }; 1010 1011 static struct hid_driver mt_driver = { 1012 .name = "hid-multitouch", 1013 .id_table = mt_devices, 1014 .probe = mt_probe, 1015 .remove = mt_remove, 1016 .input_mapping = mt_input_mapping, 1017 .input_mapped = mt_input_mapped, 1018 .feature_mapping = mt_feature_mapping, 1019 .usage_table = mt_grabbed_usages, 1020 .event = mt_event, 1021 #ifdef CONFIG_PM 1022 .reset_resume = mt_reset_resume, 1023 #endif 1024 }; 1025 1026 static int __init mt_init(void) 1027 { 1028 return hid_register_driver(&mt_driver); 1029 } 1030 1031 static void __exit mt_exit(void) 1032 { 1033 hid_unregister_driver(&mt_driver); 1034 } 1035 1036 module_init(mt_init); 1037 module_exit(mt_exit); 1038