1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for multitouch panels 4 * 5 * Copyright (c) 2010-2012 Stephane Chatty <chatty@enac.fr> 6 * Copyright (c) 2010-2013 Benjamin Tissoires <benjamin.tissoires@gmail.com> 7 * Copyright (c) 2010-2012 Ecole Nationale de l'Aviation Civile, France 8 * Copyright (c) 2012-2013 Red Hat, Inc 9 * 10 * This code is partly based on hid-egalax.c: 11 * 12 * Copyright (c) 2010 Stephane Chatty <chatty@enac.fr> 13 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se> 14 * Copyright (c) 2010 Canonical, Ltd. 15 * 16 * This code is partly based on hid-3m-pct.c: 17 * 18 * Copyright (c) 2009-2010 Stephane Chatty <chatty@enac.fr> 19 * Copyright (c) 2010 Henrik Rydberg <rydberg@euromail.se> 20 * Copyright (c) 2010 Canonical, Ltd. 21 */ 22 23 /* 24 */ 25 26 /* 27 * This driver is regularly tested thanks to the test suite in hid-tools[1]. 28 * Please run these regression tests before patching this module so that 29 * your patch won't break existing known devices. 30 * 31 * [1] https://gitlab.freedesktop.org/libevdev/hid-tools 32 */ 33 34 #include <linux/device.h> 35 #include <linux/hid.h> 36 #include <linux/module.h> 37 #include <linux/slab.h> 38 #include <linux/input/mt.h> 39 #include <linux/jiffies.h> 40 #include <linux/string.h> 41 #include <linux/timer.h> 42 43 44 MODULE_AUTHOR("Stephane Chatty <chatty@enac.fr>"); 45 MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 46 MODULE_DESCRIPTION("HID multitouch panels"); 47 MODULE_LICENSE("GPL"); 48 49 #include "hid-ids.h" 50 51 /* quirks to control the device */ 52 #define MT_QUIRK_NOT_SEEN_MEANS_UP BIT(0) 53 #define MT_QUIRK_SLOT_IS_CONTACTID BIT(1) 54 #define MT_QUIRK_CYPRESS BIT(2) 55 #define MT_QUIRK_SLOT_IS_CONTACTNUMBER BIT(3) 56 #define MT_QUIRK_ALWAYS_VALID BIT(4) 57 #define MT_QUIRK_VALID_IS_INRANGE BIT(5) 58 #define MT_QUIRK_VALID_IS_CONFIDENCE BIT(6) 59 #define MT_QUIRK_CONFIDENCE BIT(7) 60 #define MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE BIT(8) 61 #define MT_QUIRK_NO_AREA BIT(9) 62 #define MT_QUIRK_IGNORE_DUPLICATES BIT(10) 63 #define MT_QUIRK_HOVERING BIT(11) 64 #define MT_QUIRK_CONTACT_CNT_ACCURATE BIT(12) 65 #define MT_QUIRK_FORCE_GET_FEATURE BIT(13) 66 #define MT_QUIRK_FIX_CONST_CONTACT_ID BIT(14) 67 #define MT_QUIRK_TOUCH_SIZE_SCALING BIT(15) 68 #define MT_QUIRK_STICKY_FINGERS BIT(16) 69 #define MT_QUIRK_ASUS_CUSTOM_UP BIT(17) 70 #define MT_QUIRK_WIN8_PTP_BUTTONS BIT(18) 71 #define MT_QUIRK_SEPARATE_APP_REPORT BIT(19) 72 #define MT_QUIRK_FORCE_MULTI_INPUT BIT(20) 73 #define MT_QUIRK_DISABLE_WAKEUP BIT(21) 74 75 #define MT_INPUTMODE_TOUCHSCREEN 0x02 76 #define MT_INPUTMODE_TOUCHPAD 0x03 77 78 #define MT_BUTTONTYPE_CLICKPAD 0 79 80 enum latency_mode { 81 HID_LATENCY_NORMAL = 0, 82 HID_LATENCY_HIGH = 1, 83 }; 84 85 #define MT_IO_FLAGS_RUNNING 0 86 #define MT_IO_FLAGS_ACTIVE_SLOTS 1 87 #define MT_IO_FLAGS_PENDING_SLOTS 2 88 89 static const bool mtrue = true; /* default for true */ 90 static const bool mfalse; /* default for false */ 91 static const __s32 mzero; /* default for 0 */ 92 93 #define DEFAULT_TRUE ((void *)&mtrue) 94 #define DEFAULT_FALSE ((void *)&mfalse) 95 #define DEFAULT_ZERO ((void *)&mzero) 96 97 struct mt_usages { 98 struct list_head list; 99 __s32 *x, *y, *cx, *cy, *p, *w, *h, *a; 100 __s32 *contactid; /* the device ContactID assigned to this slot */ 101 bool *tip_state; /* is the touch valid? */ 102 bool *inrange_state; /* is the finger in proximity of the sensor? */ 103 bool *confidence_state; /* is the touch made by a finger? */ 104 }; 105 106 struct mt_application { 107 struct list_head list; 108 unsigned int application; 109 unsigned int report_id; 110 struct list_head mt_usages; /* mt usages list */ 111 112 __s32 quirks; 113 114 __s32 *scantime; /* scantime reported */ 115 __s32 scantime_logical_max; /* max value for raw scantime */ 116 117 __s32 *raw_cc; /* contact count in the report */ 118 int left_button_state; /* left button state */ 119 unsigned int mt_flags; /* flags to pass to input-mt */ 120 121 unsigned long *pending_palm_slots; /* slots where we reported palm 122 * and need to release */ 123 124 __u8 num_received; /* how many contacts we received */ 125 __u8 num_expected; /* expected last contact index */ 126 __u8 buttons_count; /* number of physical buttons per touchpad */ 127 __u8 touches_by_report; /* how many touches are present in one report: 128 * 1 means we should use a serial protocol 129 * > 1 means hybrid (multitouch) protocol 130 */ 131 132 __s32 dev_time; /* the scan time provided by the device */ 133 unsigned long jiffies; /* the frame's jiffies */ 134 int timestamp; /* the timestamp to be sent */ 135 int prev_scantime; /* scantime reported previously */ 136 137 bool have_contact_count; 138 }; 139 140 struct mt_class { 141 __s32 name; /* MT_CLS */ 142 __s32 quirks; 143 __s32 sn_move; /* Signal/noise ratio for move events */ 144 __s32 sn_width; /* Signal/noise ratio for width events */ 145 __s32 sn_height; /* Signal/noise ratio for height events */ 146 __s32 sn_pressure; /* Signal/noise ratio for pressure events */ 147 __u8 maxcontacts; 148 bool is_indirect; /* true for touchpads */ 149 bool export_all_inputs; /* do not ignore mouse, keyboards, etc... */ 150 }; 151 152 struct mt_report_data { 153 struct list_head list; 154 struct hid_report *report; 155 struct mt_application *application; 156 bool is_mt_collection; 157 }; 158 159 struct mt_device { 160 struct mt_class mtclass; /* our mt device class */ 161 struct timer_list release_timer; /* to release sticky fingers */ 162 struct hid_device *hdev; /* hid_device we're attached to */ 163 unsigned long mt_io_flags; /* mt flags (MT_IO_FLAGS_*) */ 164 __u8 inputmode_value; /* InputMode HID feature value */ 165 __u8 maxcontacts; 166 bool is_buttonpad; /* is this device a button pad? */ 167 bool serial_maybe; /* need to check for serial protocol */ 168 169 struct list_head applications; 170 struct list_head reports; 171 }; 172 173 static void mt_post_parse_default_settings(struct mt_device *td, 174 struct mt_application *app); 175 static void mt_post_parse(struct mt_device *td, struct mt_application *app); 176 177 /* classes of device behavior */ 178 #define MT_CLS_DEFAULT 0x0001 179 180 #define MT_CLS_SERIAL 0x0002 181 #define MT_CLS_CONFIDENCE 0x0003 182 #define MT_CLS_CONFIDENCE_CONTACT_ID 0x0004 183 #define MT_CLS_CONFIDENCE_MINUS_ONE 0x0005 184 #define MT_CLS_DUAL_INRANGE_CONTACTID 0x0006 185 #define MT_CLS_DUAL_INRANGE_CONTACTNUMBER 0x0007 186 /* reserved 0x0008 */ 187 #define MT_CLS_INRANGE_CONTACTNUMBER 0x0009 188 #define MT_CLS_NSMU 0x000a 189 /* reserved 0x0010 */ 190 /* reserved 0x0011 */ 191 #define MT_CLS_WIN_8 0x0012 192 #define MT_CLS_EXPORT_ALL_INPUTS 0x0013 193 /* reserved 0x0014 */ 194 #define MT_CLS_WIN_8_FORCE_MULTI_INPUT 0x0015 195 #define MT_CLS_WIN_8_DISABLE_WAKEUP 0x0016 196 #define MT_CLS_WIN_8_NO_STICKY_FINGERS 0x0017 197 198 /* vendor specific classes */ 199 #define MT_CLS_3M 0x0101 200 /* reserved 0x0102 */ 201 #define MT_CLS_EGALAX 0x0103 202 #define MT_CLS_EGALAX_SERIAL 0x0104 203 #define MT_CLS_TOPSEED 0x0105 204 #define MT_CLS_PANASONIC 0x0106 205 #define MT_CLS_FLATFROG 0x0107 206 #define MT_CLS_GENERALTOUCH_TWOFINGERS 0x0108 207 #define MT_CLS_GENERALTOUCH_PWT_TENFINGERS 0x0109 208 #define MT_CLS_LG 0x010a 209 #define MT_CLS_ASUS 0x010b 210 #define MT_CLS_VTL 0x0110 211 #define MT_CLS_GOOGLE 0x0111 212 #define MT_CLS_RAZER_BLADE_STEALTH 0x0112 213 #define MT_CLS_SMART_TECH 0x0113 214 215 #define MT_DEFAULT_MAXCONTACT 10 216 #define MT_MAX_MAXCONTACT 250 217 218 /* 219 * Resync device and local timestamps after that many microseconds without 220 * receiving data. 221 */ 222 #define MAX_TIMESTAMP_INTERVAL 1000000 223 224 #define MT_USB_DEVICE(v, p) HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH, v, p) 225 #define MT_BT_DEVICE(v, p) HID_DEVICE(BUS_BLUETOOTH, HID_GROUP_MULTITOUCH, v, p) 226 227 /* 228 * these device-dependent functions determine what slot corresponds 229 * to a valid contact that was just read. 230 */ 231 232 static int cypress_compute_slot(struct mt_application *application, 233 struct mt_usages *slot) 234 { 235 if (*slot->contactid != 0 || application->num_received == 0) 236 return *slot->contactid; 237 else 238 return -1; 239 } 240 241 static const struct mt_class mt_classes[] = { 242 { .name = MT_CLS_DEFAULT, 243 .quirks = MT_QUIRK_ALWAYS_VALID | 244 MT_QUIRK_CONTACT_CNT_ACCURATE }, 245 { .name = MT_CLS_NSMU, 246 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP }, 247 { .name = MT_CLS_SERIAL, 248 .quirks = MT_QUIRK_ALWAYS_VALID}, 249 { .name = MT_CLS_CONFIDENCE, 250 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE }, 251 { .name = MT_CLS_CONFIDENCE_CONTACT_ID, 252 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 253 MT_QUIRK_SLOT_IS_CONTACTID }, 254 { .name = MT_CLS_CONFIDENCE_MINUS_ONE, 255 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 256 MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE }, 257 { .name = MT_CLS_DUAL_INRANGE_CONTACTID, 258 .quirks = MT_QUIRK_VALID_IS_INRANGE | 259 MT_QUIRK_SLOT_IS_CONTACTID, 260 .maxcontacts = 2 }, 261 { .name = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 262 .quirks = MT_QUIRK_VALID_IS_INRANGE | 263 MT_QUIRK_SLOT_IS_CONTACTNUMBER, 264 .maxcontacts = 2 }, 265 { .name = MT_CLS_INRANGE_CONTACTNUMBER, 266 .quirks = MT_QUIRK_VALID_IS_INRANGE | 267 MT_QUIRK_SLOT_IS_CONTACTNUMBER }, 268 { .name = MT_CLS_WIN_8, 269 .quirks = MT_QUIRK_ALWAYS_VALID | 270 MT_QUIRK_IGNORE_DUPLICATES | 271 MT_QUIRK_HOVERING | 272 MT_QUIRK_CONTACT_CNT_ACCURATE | 273 MT_QUIRK_STICKY_FINGERS | 274 MT_QUIRK_WIN8_PTP_BUTTONS, 275 .export_all_inputs = true }, 276 { .name = MT_CLS_EXPORT_ALL_INPUTS, 277 .quirks = MT_QUIRK_ALWAYS_VALID | 278 MT_QUIRK_CONTACT_CNT_ACCURATE, 279 .export_all_inputs = true }, 280 { .name = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 281 .quirks = MT_QUIRK_ALWAYS_VALID | 282 MT_QUIRK_IGNORE_DUPLICATES | 283 MT_QUIRK_HOVERING | 284 MT_QUIRK_CONTACT_CNT_ACCURATE | 285 MT_QUIRK_STICKY_FINGERS | 286 MT_QUIRK_WIN8_PTP_BUTTONS | 287 MT_QUIRK_FORCE_MULTI_INPUT, 288 .export_all_inputs = true }, 289 { .name = MT_CLS_WIN_8_DISABLE_WAKEUP, 290 .quirks = MT_QUIRK_ALWAYS_VALID | 291 MT_QUIRK_IGNORE_DUPLICATES | 292 MT_QUIRK_HOVERING | 293 MT_QUIRK_CONTACT_CNT_ACCURATE | 294 MT_QUIRK_STICKY_FINGERS | 295 MT_QUIRK_WIN8_PTP_BUTTONS | 296 MT_QUIRK_DISABLE_WAKEUP, 297 .export_all_inputs = true }, 298 { .name = MT_CLS_WIN_8_NO_STICKY_FINGERS, 299 .quirks = MT_QUIRK_ALWAYS_VALID | 300 MT_QUIRK_IGNORE_DUPLICATES | 301 MT_QUIRK_HOVERING | 302 MT_QUIRK_CONTACT_CNT_ACCURATE | 303 MT_QUIRK_WIN8_PTP_BUTTONS, 304 .export_all_inputs = true }, 305 306 /* 307 * vendor specific classes 308 */ 309 { .name = MT_CLS_3M, 310 .quirks = MT_QUIRK_VALID_IS_CONFIDENCE | 311 MT_QUIRK_SLOT_IS_CONTACTID | 312 MT_QUIRK_TOUCH_SIZE_SCALING, 313 .sn_move = 2048, 314 .sn_width = 128, 315 .sn_height = 128, 316 .maxcontacts = 60, 317 }, 318 { .name = MT_CLS_EGALAX, 319 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 320 MT_QUIRK_VALID_IS_INRANGE, 321 .sn_move = 4096, 322 .sn_pressure = 32, 323 }, 324 { .name = MT_CLS_EGALAX_SERIAL, 325 .quirks = MT_QUIRK_SLOT_IS_CONTACTID | 326 MT_QUIRK_ALWAYS_VALID, 327 .sn_move = 4096, 328 .sn_pressure = 32, 329 }, 330 { .name = MT_CLS_TOPSEED, 331 .quirks = MT_QUIRK_ALWAYS_VALID, 332 .is_indirect = true, 333 .maxcontacts = 2, 334 }, 335 { .name = MT_CLS_PANASONIC, 336 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP, 337 .maxcontacts = 4 }, 338 { .name = MT_CLS_GENERALTOUCH_TWOFINGERS, 339 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 340 MT_QUIRK_VALID_IS_INRANGE | 341 MT_QUIRK_SLOT_IS_CONTACTID, 342 .maxcontacts = 2 343 }, 344 { .name = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 345 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 346 MT_QUIRK_SLOT_IS_CONTACTID 347 }, 348 349 { .name = MT_CLS_FLATFROG, 350 .quirks = MT_QUIRK_NOT_SEEN_MEANS_UP | 351 MT_QUIRK_NO_AREA, 352 .sn_move = 2048, 353 .maxcontacts = 40, 354 }, 355 { .name = MT_CLS_LG, 356 .quirks = MT_QUIRK_ALWAYS_VALID | 357 MT_QUIRK_FIX_CONST_CONTACT_ID | 358 MT_QUIRK_IGNORE_DUPLICATES | 359 MT_QUIRK_HOVERING | 360 MT_QUIRK_CONTACT_CNT_ACCURATE }, 361 { .name = MT_CLS_ASUS, 362 .quirks = MT_QUIRK_ALWAYS_VALID | 363 MT_QUIRK_CONTACT_CNT_ACCURATE | 364 MT_QUIRK_ASUS_CUSTOM_UP }, 365 { .name = MT_CLS_VTL, 366 .quirks = MT_QUIRK_ALWAYS_VALID | 367 MT_QUIRK_CONTACT_CNT_ACCURATE | 368 MT_QUIRK_FORCE_GET_FEATURE, 369 }, 370 { .name = MT_CLS_GOOGLE, 371 .quirks = MT_QUIRK_ALWAYS_VALID | 372 MT_QUIRK_CONTACT_CNT_ACCURATE | 373 MT_QUIRK_SLOT_IS_CONTACTID | 374 MT_QUIRK_HOVERING 375 }, 376 { .name = MT_CLS_RAZER_BLADE_STEALTH, 377 .quirks = MT_QUIRK_ALWAYS_VALID | 378 MT_QUIRK_IGNORE_DUPLICATES | 379 MT_QUIRK_HOVERING | 380 MT_QUIRK_CONTACT_CNT_ACCURATE | 381 MT_QUIRK_WIN8_PTP_BUTTONS, 382 }, 383 { .name = MT_CLS_SMART_TECH, 384 .quirks = MT_QUIRK_ALWAYS_VALID | 385 MT_QUIRK_IGNORE_DUPLICATES | 386 MT_QUIRK_CONTACT_CNT_ACCURATE | 387 MT_QUIRK_SEPARATE_APP_REPORT, 388 }, 389 { } 390 }; 391 392 static ssize_t mt_show_quirks(struct device *dev, 393 struct device_attribute *attr, 394 char *buf) 395 { 396 struct hid_device *hdev = to_hid_device(dev); 397 struct mt_device *td = hid_get_drvdata(hdev); 398 399 return sprintf(buf, "%u\n", td->mtclass.quirks); 400 } 401 402 static ssize_t mt_set_quirks(struct device *dev, 403 struct device_attribute *attr, 404 const char *buf, size_t count) 405 { 406 struct hid_device *hdev = to_hid_device(dev); 407 struct mt_device *td = hid_get_drvdata(hdev); 408 struct mt_application *application; 409 410 unsigned long val; 411 412 if (kstrtoul(buf, 0, &val)) 413 return -EINVAL; 414 415 td->mtclass.quirks = val; 416 417 list_for_each_entry(application, &td->applications, list) { 418 application->quirks = val; 419 if (!application->have_contact_count) 420 application->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 421 } 422 423 return count; 424 } 425 426 static DEVICE_ATTR(quirks, S_IWUSR | S_IRUGO, mt_show_quirks, mt_set_quirks); 427 428 static struct attribute *sysfs_attrs[] = { 429 &dev_attr_quirks.attr, 430 NULL 431 }; 432 433 static const struct attribute_group mt_attribute_group = { 434 .attrs = sysfs_attrs 435 }; 436 437 static void mt_get_feature(struct hid_device *hdev, struct hid_report *report) 438 { 439 int ret; 440 u32 size = hid_report_len(report); 441 u8 *buf; 442 443 /* 444 * Do not fetch the feature report if the device has been explicitly 445 * marked as non-capable. 446 */ 447 if (hdev->quirks & HID_QUIRK_NO_INIT_REPORTS) 448 return; 449 450 buf = hid_alloc_report_buf(report, GFP_KERNEL); 451 if (!buf) 452 return; 453 454 ret = hid_hw_raw_request(hdev, report->id, buf, size, 455 HID_FEATURE_REPORT, HID_REQ_GET_REPORT); 456 if (ret < 0) { 457 dev_warn(&hdev->dev, "failed to fetch feature %d\n", 458 report->id); 459 } else { 460 ret = hid_report_raw_event(hdev, HID_FEATURE_REPORT, buf, 461 size, 0); 462 if (ret) 463 dev_warn(&hdev->dev, "failed to report feature\n"); 464 } 465 466 kfree(buf); 467 } 468 469 static void mt_feature_mapping(struct hid_device *hdev, 470 struct hid_field *field, struct hid_usage *usage) 471 { 472 struct mt_device *td = hid_get_drvdata(hdev); 473 474 switch (usage->hid) { 475 case HID_DG_CONTACTMAX: 476 mt_get_feature(hdev, field->report); 477 478 td->maxcontacts = field->value[0]; 479 if (!td->maxcontacts && 480 field->logical_maximum <= MT_MAX_MAXCONTACT) 481 td->maxcontacts = field->logical_maximum; 482 if (td->mtclass.maxcontacts) 483 /* check if the maxcontacts is given by the class */ 484 td->maxcontacts = td->mtclass.maxcontacts; 485 486 break; 487 case HID_DG_BUTTONTYPE: 488 if (usage->usage_index >= field->report_count) { 489 dev_err(&hdev->dev, "HID_DG_BUTTONTYPE out of range\n"); 490 break; 491 } 492 493 mt_get_feature(hdev, field->report); 494 if (field->value[usage->usage_index] == MT_BUTTONTYPE_CLICKPAD) 495 td->is_buttonpad = true; 496 497 break; 498 case 0xff0000c5: 499 /* Retrieve the Win8 blob once to enable some devices */ 500 if (usage->usage_index == 0) 501 mt_get_feature(hdev, field->report); 502 break; 503 } 504 } 505 506 static void set_abs(struct input_dev *input, unsigned int code, 507 struct hid_field *field, int snratio) 508 { 509 int fmin = field->logical_minimum; 510 int fmax = field->logical_maximum; 511 int fuzz = snratio ? (fmax - fmin) / snratio : 0; 512 input_set_abs_params(input, code, fmin, fmax, fuzz, 0); 513 input_abs_set_res(input, code, hidinput_calc_abs_res(field, code)); 514 } 515 516 static struct mt_usages *mt_allocate_usage(struct hid_device *hdev, 517 struct mt_application *application) 518 { 519 struct mt_usages *usage; 520 521 usage = devm_kzalloc(&hdev->dev, sizeof(*usage), GFP_KERNEL); 522 if (!usage) 523 return NULL; 524 525 /* set some defaults so we do not need to check for null pointers */ 526 usage->x = DEFAULT_ZERO; 527 usage->y = DEFAULT_ZERO; 528 usage->cx = DEFAULT_ZERO; 529 usage->cy = DEFAULT_ZERO; 530 usage->p = DEFAULT_ZERO; 531 usage->w = DEFAULT_ZERO; 532 usage->h = DEFAULT_ZERO; 533 usage->a = DEFAULT_ZERO; 534 usage->contactid = DEFAULT_ZERO; 535 usage->tip_state = DEFAULT_FALSE; 536 usage->inrange_state = DEFAULT_FALSE; 537 usage->confidence_state = DEFAULT_TRUE; 538 539 list_add_tail(&usage->list, &application->mt_usages); 540 541 return usage; 542 } 543 544 static struct mt_application *mt_allocate_application(struct mt_device *td, 545 struct hid_report *report) 546 { 547 unsigned int application = report->application; 548 struct mt_application *mt_application; 549 550 mt_application = devm_kzalloc(&td->hdev->dev, sizeof(*mt_application), 551 GFP_KERNEL); 552 if (!mt_application) 553 return NULL; 554 555 mt_application->application = application; 556 INIT_LIST_HEAD(&mt_application->mt_usages); 557 558 if (application == HID_DG_TOUCHSCREEN) 559 mt_application->mt_flags |= INPUT_MT_DIRECT; 560 561 /* 562 * Model touchscreens providing buttons as touchpads. 563 */ 564 if (application == HID_DG_TOUCHPAD) { 565 mt_application->mt_flags |= INPUT_MT_POINTER; 566 td->inputmode_value = MT_INPUTMODE_TOUCHPAD; 567 } 568 569 mt_application->scantime = DEFAULT_ZERO; 570 mt_application->raw_cc = DEFAULT_ZERO; 571 mt_application->quirks = td->mtclass.quirks; 572 mt_application->report_id = report->id; 573 574 list_add_tail(&mt_application->list, &td->applications); 575 576 return mt_application; 577 } 578 579 static struct mt_application *mt_find_application(struct mt_device *td, 580 struct hid_report *report) 581 { 582 unsigned int application = report->application; 583 struct mt_application *tmp, *mt_application = NULL; 584 585 list_for_each_entry(tmp, &td->applications, list) { 586 if (application == tmp->application) { 587 if (!(td->mtclass.quirks & MT_QUIRK_SEPARATE_APP_REPORT) || 588 tmp->report_id == report->id) { 589 mt_application = tmp; 590 break; 591 } 592 } 593 } 594 595 if (!mt_application) 596 mt_application = mt_allocate_application(td, report); 597 598 return mt_application; 599 } 600 601 static struct mt_report_data *mt_allocate_report_data(struct mt_device *td, 602 struct hid_report *report) 603 { 604 struct mt_report_data *rdata; 605 struct hid_field *field; 606 int r, n; 607 608 rdata = devm_kzalloc(&td->hdev->dev, sizeof(*rdata), GFP_KERNEL); 609 if (!rdata) 610 return NULL; 611 612 rdata->report = report; 613 rdata->application = mt_find_application(td, report); 614 615 if (!rdata->application) { 616 devm_kfree(&td->hdev->dev, rdata); 617 return NULL; 618 } 619 620 for (r = 0; r < report->maxfield; r++) { 621 field = report->field[r]; 622 623 if (!(HID_MAIN_ITEM_VARIABLE & field->flags)) 624 continue; 625 626 if (field->logical == HID_DG_FINGER || td->hdev->group != HID_GROUP_MULTITOUCH_WIN_8) { 627 for (n = 0; n < field->report_count; n++) { 628 if (field->usage[n].hid == HID_DG_CONTACTID) { 629 rdata->is_mt_collection = true; 630 break; 631 } 632 } 633 } 634 } 635 636 list_add_tail(&rdata->list, &td->reports); 637 638 return rdata; 639 } 640 641 static struct mt_report_data *mt_find_report_data(struct mt_device *td, 642 struct hid_report *report) 643 { 644 struct mt_report_data *tmp, *rdata = NULL; 645 646 list_for_each_entry(tmp, &td->reports, list) { 647 if (report == tmp->report) { 648 rdata = tmp; 649 break; 650 } 651 } 652 653 if (!rdata) 654 rdata = mt_allocate_report_data(td, report); 655 656 return rdata; 657 } 658 659 static void mt_store_field(struct hid_device *hdev, 660 struct mt_application *application, 661 __s32 *value, 662 size_t offset) 663 { 664 struct mt_usages *usage; 665 __s32 **target; 666 667 if (list_empty(&application->mt_usages)) 668 usage = mt_allocate_usage(hdev, application); 669 else 670 usage = list_last_entry(&application->mt_usages, 671 struct mt_usages, 672 list); 673 674 if (!usage) 675 return; 676 677 target = (__s32 **)((char *)usage + offset); 678 679 /* the value has already been filled, create a new slot */ 680 if (*target != DEFAULT_TRUE && 681 *target != DEFAULT_FALSE && 682 *target != DEFAULT_ZERO) { 683 if (usage->contactid == DEFAULT_ZERO || 684 usage->x == DEFAULT_ZERO || 685 usage->y == DEFAULT_ZERO) { 686 hid_dbg(hdev, 687 "ignoring duplicate usage on incomplete"); 688 return; 689 } 690 usage = mt_allocate_usage(hdev, application); 691 if (!usage) 692 return; 693 694 target = (__s32 **)((char *)usage + offset); 695 } 696 697 *target = value; 698 } 699 700 #define MT_STORE_FIELD(__name) \ 701 mt_store_field(hdev, app, \ 702 &field->value[usage->usage_index], \ 703 offsetof(struct mt_usages, __name)) 704 705 static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi, 706 struct hid_field *field, struct hid_usage *usage, 707 unsigned long **bit, int *max, struct mt_application *app) 708 { 709 struct mt_device *td = hid_get_drvdata(hdev); 710 struct mt_class *cls = &td->mtclass; 711 int code; 712 struct hid_usage *prev_usage = NULL; 713 714 /* 715 * Model touchscreens providing buttons as touchpads. 716 */ 717 if (field->application == HID_DG_TOUCHSCREEN && 718 (usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) { 719 app->mt_flags |= INPUT_MT_POINTER; 720 td->inputmode_value = MT_INPUTMODE_TOUCHPAD; 721 } 722 723 /* count the buttons on touchpads */ 724 if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) 725 app->buttons_count++; 726 727 if (usage->usage_index) 728 prev_usage = &field->usage[usage->usage_index - 1]; 729 730 switch (usage->hid & HID_USAGE_PAGE) { 731 732 case HID_UP_GENDESK: 733 switch (usage->hid) { 734 case HID_GD_X: 735 if (prev_usage && (prev_usage->hid == usage->hid)) { 736 code = ABS_MT_TOOL_X; 737 MT_STORE_FIELD(cx); 738 } else { 739 code = ABS_MT_POSITION_X; 740 MT_STORE_FIELD(x); 741 } 742 743 set_abs(hi->input, code, field, cls->sn_move); 744 745 /* 746 * A system multi-axis that exports X and Y has a high 747 * chance of being used directly on a surface 748 */ 749 if (field->application == HID_GD_SYSTEM_MULTIAXIS) { 750 __set_bit(INPUT_PROP_DIRECT, 751 hi->input->propbit); 752 input_set_abs_params(hi->input, 753 ABS_MT_TOOL_TYPE, 754 MT_TOOL_DIAL, 755 MT_TOOL_DIAL, 0, 0); 756 } 757 758 return 1; 759 case HID_GD_Y: 760 if (prev_usage && (prev_usage->hid == usage->hid)) { 761 code = ABS_MT_TOOL_Y; 762 MT_STORE_FIELD(cy); 763 } else { 764 code = ABS_MT_POSITION_Y; 765 MT_STORE_FIELD(y); 766 } 767 768 set_abs(hi->input, code, field, cls->sn_move); 769 770 return 1; 771 } 772 return 0; 773 774 case HID_UP_DIGITIZER: 775 switch (usage->hid) { 776 case HID_DG_INRANGE: 777 if (app->quirks & MT_QUIRK_HOVERING) { 778 input_set_abs_params(hi->input, 779 ABS_MT_DISTANCE, 0, 1, 0, 0); 780 } 781 MT_STORE_FIELD(inrange_state); 782 return 1; 783 case HID_DG_CONFIDENCE: 784 if ((cls->name == MT_CLS_WIN_8 || 785 cls->name == MT_CLS_WIN_8_FORCE_MULTI_INPUT || 786 cls->name == MT_CLS_WIN_8_DISABLE_WAKEUP) && 787 (field->application == HID_DG_TOUCHPAD || 788 field->application == HID_DG_TOUCHSCREEN)) 789 app->quirks |= MT_QUIRK_CONFIDENCE; 790 791 if (app->quirks & MT_QUIRK_CONFIDENCE) 792 input_set_abs_params(hi->input, 793 ABS_MT_TOOL_TYPE, 794 MT_TOOL_FINGER, 795 MT_TOOL_PALM, 0, 0); 796 797 MT_STORE_FIELD(confidence_state); 798 return 1; 799 case HID_DG_TIPSWITCH: 800 if (field->application != HID_GD_SYSTEM_MULTIAXIS) 801 input_set_capability(hi->input, 802 EV_KEY, BTN_TOUCH); 803 MT_STORE_FIELD(tip_state); 804 return 1; 805 case HID_DG_CONTACTID: 806 MT_STORE_FIELD(contactid); 807 app->touches_by_report++; 808 return 1; 809 case HID_DG_WIDTH: 810 if (!(app->quirks & MT_QUIRK_NO_AREA)) 811 set_abs(hi->input, ABS_MT_TOUCH_MAJOR, field, 812 cls->sn_width); 813 MT_STORE_FIELD(w); 814 return 1; 815 case HID_DG_HEIGHT: 816 if (!(app->quirks & MT_QUIRK_NO_AREA)) { 817 set_abs(hi->input, ABS_MT_TOUCH_MINOR, field, 818 cls->sn_height); 819 820 /* 821 * Only set ABS_MT_ORIENTATION if it is not 822 * already set by the HID_DG_AZIMUTH usage. 823 */ 824 if (!test_bit(ABS_MT_ORIENTATION, 825 hi->input->absbit)) 826 input_set_abs_params(hi->input, 827 ABS_MT_ORIENTATION, 0, 1, 0, 0); 828 } 829 MT_STORE_FIELD(h); 830 return 1; 831 case HID_DG_TIPPRESSURE: 832 set_abs(hi->input, ABS_MT_PRESSURE, field, 833 cls->sn_pressure); 834 MT_STORE_FIELD(p); 835 return 1; 836 case HID_DG_SCANTIME: 837 input_set_capability(hi->input, EV_MSC, MSC_TIMESTAMP); 838 app->scantime = &field->value[usage->usage_index]; 839 app->scantime_logical_max = field->logical_maximum; 840 return 1; 841 case HID_DG_CONTACTCOUNT: 842 app->have_contact_count = true; 843 app->raw_cc = &field->value[usage->usage_index]; 844 return 1; 845 case HID_DG_AZIMUTH: 846 /* 847 * Azimuth has the range of [0, MAX) representing a full 848 * revolution. Set ABS_MT_ORIENTATION to a quarter of 849 * MAX according the definition of ABS_MT_ORIENTATION 850 */ 851 input_set_abs_params(hi->input, ABS_MT_ORIENTATION, 852 -field->logical_maximum / 4, 853 field->logical_maximum / 4, 854 cls->sn_move ? 855 field->logical_maximum / cls->sn_move : 0, 0); 856 MT_STORE_FIELD(a); 857 return 1; 858 case HID_DG_CONTACTMAX: 859 /* contact max are global to the report */ 860 return -1; 861 case HID_DG_TOUCH: 862 /* Legacy devices use TIPSWITCH and not TOUCH. 863 * Let's just ignore this field. */ 864 return -1; 865 } 866 /* let hid-input decide for the others */ 867 return 0; 868 869 case HID_UP_BUTTON: 870 code = BTN_MOUSE + ((usage->hid - 1) & HID_USAGE); 871 /* 872 * MS PTP spec says that external buttons left and right have 873 * usages 2 and 3. 874 */ 875 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) && 876 field->application == HID_DG_TOUCHPAD && 877 (usage->hid & HID_USAGE) > 1) 878 code--; 879 880 if (field->application == HID_GD_SYSTEM_MULTIAXIS) 881 code = BTN_0 + ((usage->hid - 1) & HID_USAGE); 882 883 hid_map_usage(hi, usage, bit, max, EV_KEY, code); 884 if (!*bit) 885 return -1; 886 input_set_capability(hi->input, EV_KEY, code); 887 return 1; 888 889 case 0xff000000: 890 /* we do not want to map these: no input-oriented meaning */ 891 return -1; 892 } 893 894 return 0; 895 } 896 897 static int mt_compute_slot(struct mt_device *td, struct mt_application *app, 898 struct mt_usages *slot, 899 struct input_dev *input) 900 { 901 __s32 quirks = app->quirks; 902 903 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID) 904 return *slot->contactid; 905 906 if (quirks & MT_QUIRK_CYPRESS) 907 return cypress_compute_slot(app, slot); 908 909 if (quirks & MT_QUIRK_SLOT_IS_CONTACTNUMBER) 910 return app->num_received; 911 912 if (quirks & MT_QUIRK_SLOT_IS_CONTACTID_MINUS_ONE) 913 return *slot->contactid - 1; 914 915 return input_mt_get_slot_by_key(input, *slot->contactid); 916 } 917 918 static void mt_release_pending_palms(struct mt_device *td, 919 struct mt_application *app, 920 struct input_dev *input) 921 { 922 int slotnum; 923 bool need_sync = false; 924 925 for_each_set_bit(slotnum, app->pending_palm_slots, td->maxcontacts) { 926 clear_bit(slotnum, app->pending_palm_slots); 927 928 input_mt_slot(input, slotnum); 929 input_mt_report_slot_inactive(input); 930 931 need_sync = true; 932 } 933 934 if (need_sync) { 935 input_mt_sync_frame(input); 936 input_sync(input); 937 } 938 } 939 940 /* 941 * this function is called when a whole packet has been received and processed, 942 * so that it can decide what to send to the input layer. 943 */ 944 static void mt_sync_frame(struct mt_device *td, struct mt_application *app, 945 struct input_dev *input) 946 { 947 if (app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) 948 input_event(input, EV_KEY, BTN_LEFT, app->left_button_state); 949 950 input_mt_sync_frame(input); 951 input_event(input, EV_MSC, MSC_TIMESTAMP, app->timestamp); 952 input_sync(input); 953 954 mt_release_pending_palms(td, app, input); 955 956 app->num_received = 0; 957 app->left_button_state = 0; 958 959 if (test_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags)) 960 set_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags); 961 else 962 clear_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags); 963 clear_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags); 964 } 965 966 static int mt_compute_timestamp(struct mt_application *app, __s32 value) 967 { 968 long delta = value - app->prev_scantime; 969 unsigned long jdelta = jiffies_to_usecs(jiffies - app->jiffies); 970 971 app->jiffies = jiffies; 972 973 if (delta < 0) 974 delta += app->scantime_logical_max; 975 976 /* HID_DG_SCANTIME is expressed in 100us, we want it in us. */ 977 delta *= 100; 978 979 if (jdelta > MAX_TIMESTAMP_INTERVAL) 980 /* No data received for a while, resync the timestamp. */ 981 return 0; 982 else 983 return app->timestamp + delta; 984 } 985 986 static int mt_touch_event(struct hid_device *hid, struct hid_field *field, 987 struct hid_usage *usage, __s32 value) 988 { 989 /* we will handle the hidinput part later, now remains hiddev */ 990 if (hid->claimed & HID_CLAIMED_HIDDEV && hid->hiddev_hid_event) 991 hid->hiddev_hid_event(hid, field, usage, value); 992 993 return 1; 994 } 995 996 static int mt_process_slot(struct mt_device *td, struct input_dev *input, 997 struct mt_application *app, 998 struct mt_usages *slot) 999 { 1000 struct input_mt *mt = input->mt; 1001 __s32 quirks = app->quirks; 1002 bool valid = true; 1003 bool confidence_state = true; 1004 bool inrange_state = false; 1005 int active; 1006 int slotnum; 1007 int tool = MT_TOOL_FINGER; 1008 1009 if (!slot) 1010 return -EINVAL; 1011 1012 if ((quirks & MT_QUIRK_CONTACT_CNT_ACCURATE) && 1013 app->num_received >= app->num_expected) 1014 return -EAGAIN; 1015 1016 if (!(quirks & MT_QUIRK_ALWAYS_VALID)) { 1017 if (quirks & MT_QUIRK_VALID_IS_INRANGE) 1018 valid = *slot->inrange_state; 1019 if (quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) 1020 valid = *slot->tip_state; 1021 if (quirks & MT_QUIRK_VALID_IS_CONFIDENCE) 1022 valid = *slot->confidence_state; 1023 1024 if (!valid) 1025 return 0; 1026 } 1027 1028 slotnum = mt_compute_slot(td, app, slot, input); 1029 if (slotnum < 0 || slotnum >= td->maxcontacts) 1030 return 0; 1031 1032 if ((quirks & MT_QUIRK_IGNORE_DUPLICATES) && mt) { 1033 struct input_mt_slot *i_slot = &mt->slots[slotnum]; 1034 1035 if (input_mt_is_active(i_slot) && 1036 input_mt_is_used(mt, i_slot)) 1037 return -EAGAIN; 1038 } 1039 1040 if (quirks & MT_QUIRK_CONFIDENCE) 1041 confidence_state = *slot->confidence_state; 1042 1043 if (quirks & MT_QUIRK_HOVERING) 1044 inrange_state = *slot->inrange_state; 1045 1046 active = *slot->tip_state || inrange_state; 1047 1048 if (app->application == HID_GD_SYSTEM_MULTIAXIS) 1049 tool = MT_TOOL_DIAL; 1050 else if (unlikely(!confidence_state)) { 1051 tool = MT_TOOL_PALM; 1052 if (!active && mt && 1053 input_mt_is_active(&mt->slots[slotnum])) { 1054 /* 1055 * The non-confidence was reported for 1056 * previously valid contact that is also no 1057 * longer valid. We can't simply report 1058 * lift-off as userspace will not be aware 1059 * of non-confidence, so we need to split 1060 * it into 2 events: active MT_TOOL_PALM 1061 * and a separate liftoff. 1062 */ 1063 active = true; 1064 set_bit(slotnum, app->pending_palm_slots); 1065 } 1066 } 1067 1068 input_mt_slot(input, slotnum); 1069 input_mt_report_slot_state(input, tool, active); 1070 if (active) { 1071 /* this finger is in proximity of the sensor */ 1072 int wide = (*slot->w > *slot->h); 1073 int major = max(*slot->w, *slot->h); 1074 int minor = min(*slot->w, *slot->h); 1075 int orientation = wide; 1076 int max_azimuth; 1077 int azimuth; 1078 1079 if (slot->a != DEFAULT_ZERO) { 1080 /* 1081 * Azimuth is counter-clockwise and ranges from [0, MAX) 1082 * (a full revolution). Convert it to clockwise ranging 1083 * [-MAX/2, MAX/2]. 1084 * 1085 * Note that ABS_MT_ORIENTATION require us to report 1086 * the limit of [-MAX/4, MAX/4], but the value can go 1087 * out of range to [-MAX/2, MAX/2] to report an upside 1088 * down ellipsis. 1089 */ 1090 azimuth = *slot->a; 1091 max_azimuth = input_abs_get_max(input, 1092 ABS_MT_ORIENTATION); 1093 if (azimuth > max_azimuth * 2) 1094 azimuth -= max_azimuth * 4; 1095 orientation = -azimuth; 1096 } 1097 1098 if (quirks & MT_QUIRK_TOUCH_SIZE_SCALING) { 1099 /* 1100 * divided by two to match visual scale of touch 1101 * for devices with this quirk 1102 */ 1103 major = major >> 1; 1104 minor = minor >> 1; 1105 } 1106 1107 input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x); 1108 input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y); 1109 input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx); 1110 input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy); 1111 input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state); 1112 input_event(input, EV_ABS, ABS_MT_ORIENTATION, orientation); 1113 input_event(input, EV_ABS, ABS_MT_PRESSURE, *slot->p); 1114 input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); 1115 input_event(input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); 1116 1117 set_bit(MT_IO_FLAGS_ACTIVE_SLOTS, &td->mt_io_flags); 1118 } 1119 1120 return 0; 1121 } 1122 1123 static void mt_process_mt_event(struct hid_device *hid, 1124 struct mt_application *app, 1125 struct hid_field *field, 1126 struct hid_usage *usage, 1127 __s32 value, 1128 bool first_packet) 1129 { 1130 __s32 quirks = app->quirks; 1131 struct input_dev *input = field->hidinput->input; 1132 1133 if (!usage->type || !(hid->claimed & HID_CLAIMED_INPUT)) 1134 return; 1135 1136 if (quirks & MT_QUIRK_WIN8_PTP_BUTTONS) { 1137 1138 /* 1139 * For Win8 PTP touchpads we should only look at 1140 * non finger/touch events in the first_packet of a 1141 * (possible) multi-packet frame. 1142 */ 1143 if (!first_packet) 1144 return; 1145 1146 /* 1147 * For Win8 PTP touchpads we map both the clickpad click 1148 * and any "external" left buttons to BTN_LEFT if a 1149 * device claims to have both we need to report 1 for 1150 * BTN_LEFT if either is pressed, so we or all values 1151 * together and report the result in mt_sync_frame(). 1152 */ 1153 if (usage->type == EV_KEY && usage->code == BTN_LEFT) { 1154 app->left_button_state |= value; 1155 return; 1156 } 1157 } 1158 1159 input_event(input, usage->type, usage->code, value); 1160 } 1161 1162 static void mt_touch_report(struct hid_device *hid, 1163 struct mt_report_data *rdata) 1164 { 1165 struct mt_device *td = hid_get_drvdata(hid); 1166 struct hid_report *report = rdata->report; 1167 struct mt_application *app = rdata->application; 1168 struct hid_field *field; 1169 struct input_dev *input; 1170 struct mt_usages *slot; 1171 bool first_packet; 1172 unsigned count; 1173 int r, n; 1174 int scantime = 0; 1175 int contact_count = -1; 1176 1177 /* sticky fingers release in progress, abort */ 1178 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags)) 1179 return; 1180 1181 scantime = *app->scantime; 1182 app->timestamp = mt_compute_timestamp(app, scantime); 1183 if (app->raw_cc != DEFAULT_ZERO) 1184 contact_count = *app->raw_cc; 1185 1186 /* 1187 * Includes multi-packet support where subsequent 1188 * packets are sent with zero contactcount. 1189 */ 1190 if (contact_count >= 0) { 1191 /* 1192 * For Win8 PTPs the first packet (td->num_received == 0) may 1193 * have a contactcount of 0 if there only is a button event. 1194 * We double check that this is not a continuation packet 1195 * of a possible multi-packet frame be checking that the 1196 * timestamp has changed. 1197 */ 1198 if ((app->quirks & MT_QUIRK_WIN8_PTP_BUTTONS) && 1199 app->num_received == 0 && 1200 app->prev_scantime != scantime) 1201 app->num_expected = contact_count; 1202 /* A non 0 contact count always indicates a first packet */ 1203 else if (contact_count) 1204 app->num_expected = contact_count; 1205 } 1206 app->prev_scantime = scantime; 1207 1208 first_packet = app->num_received == 0; 1209 1210 input = report->field[0]->hidinput->input; 1211 1212 list_for_each_entry(slot, &app->mt_usages, list) { 1213 if (!mt_process_slot(td, input, app, slot)) 1214 app->num_received++; 1215 } 1216 1217 for (r = 0; r < report->maxfield; r++) { 1218 field = report->field[r]; 1219 count = field->report_count; 1220 1221 if (!(HID_MAIN_ITEM_VARIABLE & field->flags)) 1222 continue; 1223 1224 for (n = 0; n < count; n++) 1225 mt_process_mt_event(hid, app, field, 1226 &field->usage[n], field->value[n], 1227 first_packet); 1228 } 1229 1230 if (app->num_received >= app->num_expected) 1231 mt_sync_frame(td, app, input); 1232 1233 /* 1234 * Windows 8 specs says 2 things: 1235 * - once a contact has been reported, it has to be reported in each 1236 * subsequent report 1237 * - the report rate when fingers are present has to be at least 1238 * the refresh rate of the screen, 60 or 120 Hz 1239 * 1240 * I interprete this that the specification forces a report rate of 1241 * at least 60 Hz for a touchscreen to be certified. 1242 * Which means that if we do not get a report whithin 16 ms, either 1243 * something wrong happens, either the touchscreen forgets to send 1244 * a release. Taking a reasonable margin allows to remove issues 1245 * with USB communication or the load of the machine. 1246 * 1247 * Given that Win 8 devices are forced to send a release, this will 1248 * only affect laggish machines and the ones that have a firmware 1249 * defect. 1250 */ 1251 if (app->quirks & MT_QUIRK_STICKY_FINGERS) { 1252 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags)) 1253 mod_timer(&td->release_timer, 1254 jiffies + msecs_to_jiffies(100)); 1255 else 1256 del_timer(&td->release_timer); 1257 } 1258 1259 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags); 1260 } 1261 1262 static int mt_touch_input_configured(struct hid_device *hdev, 1263 struct hid_input *hi, 1264 struct mt_application *app) 1265 { 1266 struct mt_device *td = hid_get_drvdata(hdev); 1267 struct mt_class *cls = &td->mtclass; 1268 struct input_dev *input = hi->input; 1269 int ret; 1270 1271 if (!td->maxcontacts) 1272 td->maxcontacts = MT_DEFAULT_MAXCONTACT; 1273 1274 mt_post_parse(td, app); 1275 if (td->serial_maybe) 1276 mt_post_parse_default_settings(td, app); 1277 1278 if (cls->is_indirect) 1279 app->mt_flags |= INPUT_MT_POINTER; 1280 1281 if (app->quirks & MT_QUIRK_NOT_SEEN_MEANS_UP) 1282 app->mt_flags |= INPUT_MT_DROP_UNUSED; 1283 1284 /* check for clickpads */ 1285 if ((app->mt_flags & INPUT_MT_POINTER) && 1286 (app->buttons_count == 1)) 1287 td->is_buttonpad = true; 1288 1289 if (td->is_buttonpad) 1290 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); 1291 1292 app->pending_palm_slots = devm_kcalloc(&hi->input->dev, 1293 BITS_TO_LONGS(td->maxcontacts), 1294 sizeof(long), 1295 GFP_KERNEL); 1296 if (!app->pending_palm_slots) 1297 return -ENOMEM; 1298 1299 ret = input_mt_init_slots(input, td->maxcontacts, app->mt_flags); 1300 if (ret) 1301 return ret; 1302 1303 app->mt_flags = 0; 1304 return 0; 1305 } 1306 1307 #define mt_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, \ 1308 max, EV_KEY, (c)) 1309 static int mt_input_mapping(struct hid_device *hdev, struct hid_input *hi, 1310 struct hid_field *field, struct hid_usage *usage, 1311 unsigned long **bit, int *max) 1312 { 1313 struct mt_device *td = hid_get_drvdata(hdev); 1314 struct mt_application *application; 1315 struct mt_report_data *rdata; 1316 1317 rdata = mt_find_report_data(td, field->report); 1318 if (!rdata) { 1319 hid_err(hdev, "failed to allocate data for report\n"); 1320 return 0; 1321 } 1322 1323 application = rdata->application; 1324 1325 /* 1326 * If mtclass.export_all_inputs is not set, only map fields from 1327 * TouchScreen or TouchPad collections. We need to ignore fields 1328 * that belong to other collections such as Mouse that might have 1329 * the same GenericDesktop usages. 1330 */ 1331 if (!td->mtclass.export_all_inputs && 1332 field->application != HID_DG_TOUCHSCREEN && 1333 field->application != HID_DG_PEN && 1334 field->application != HID_DG_TOUCHPAD && 1335 field->application != HID_GD_KEYBOARD && 1336 field->application != HID_GD_SYSTEM_CONTROL && 1337 field->application != HID_CP_CONSUMER_CONTROL && 1338 field->application != HID_GD_WIRELESS_RADIO_CTLS && 1339 field->application != HID_GD_SYSTEM_MULTIAXIS && 1340 !(field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS && 1341 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP)) 1342 return -1; 1343 1344 /* 1345 * Some Asus keyboard+touchpad devices have the hotkeys defined in the 1346 * touchpad report descriptor. We need to treat these as an array to 1347 * map usages to input keys. 1348 */ 1349 if (field->application == HID_VD_ASUS_CUSTOM_MEDIA_KEYS && 1350 application->quirks & MT_QUIRK_ASUS_CUSTOM_UP && 1351 (usage->hid & HID_USAGE_PAGE) == HID_UP_CUSTOM) { 1352 set_bit(EV_REP, hi->input->evbit); 1353 if (field->flags & HID_MAIN_ITEM_VARIABLE) 1354 field->flags &= ~HID_MAIN_ITEM_VARIABLE; 1355 switch (usage->hid & HID_USAGE) { 1356 case 0x10: mt_map_key_clear(KEY_BRIGHTNESSDOWN); break; 1357 case 0x20: mt_map_key_clear(KEY_BRIGHTNESSUP); break; 1358 case 0x35: mt_map_key_clear(KEY_DISPLAY_OFF); break; 1359 case 0x6b: mt_map_key_clear(KEY_F21); break; 1360 case 0x6c: mt_map_key_clear(KEY_SLEEP); break; 1361 default: 1362 return -1; 1363 } 1364 return 1; 1365 } 1366 1367 if (rdata->is_mt_collection) 1368 return mt_touch_input_mapping(hdev, hi, field, usage, bit, max, 1369 application); 1370 1371 /* 1372 * some egalax touchscreens have "application == DG_TOUCHSCREEN" 1373 * for the stylus. Overwrite the hid_input application 1374 */ 1375 if (field->physical == HID_DG_STYLUS) 1376 hi->application = HID_DG_STYLUS; 1377 1378 /* let hid-core decide for the others */ 1379 return 0; 1380 } 1381 1382 static int mt_input_mapped(struct hid_device *hdev, struct hid_input *hi, 1383 struct hid_field *field, struct hid_usage *usage, 1384 unsigned long **bit, int *max) 1385 { 1386 struct mt_device *td = hid_get_drvdata(hdev); 1387 struct mt_report_data *rdata; 1388 1389 rdata = mt_find_report_data(td, field->report); 1390 if (rdata && rdata->is_mt_collection) { 1391 /* We own these mappings, tell hid-input to ignore them */ 1392 return -1; 1393 } 1394 1395 /* let hid-core decide for the others */ 1396 return 0; 1397 } 1398 1399 static int mt_event(struct hid_device *hid, struct hid_field *field, 1400 struct hid_usage *usage, __s32 value) 1401 { 1402 struct mt_device *td = hid_get_drvdata(hid); 1403 struct mt_report_data *rdata; 1404 1405 rdata = mt_find_report_data(td, field->report); 1406 if (rdata && rdata->is_mt_collection) 1407 return mt_touch_event(hid, field, usage, value); 1408 1409 return 0; 1410 } 1411 1412 static void mt_report(struct hid_device *hid, struct hid_report *report) 1413 { 1414 struct mt_device *td = hid_get_drvdata(hid); 1415 struct hid_field *field = report->field[0]; 1416 struct mt_report_data *rdata; 1417 1418 if (!(hid->claimed & HID_CLAIMED_INPUT)) 1419 return; 1420 1421 rdata = mt_find_report_data(td, report); 1422 if (rdata && rdata->is_mt_collection) 1423 return mt_touch_report(hid, rdata); 1424 1425 if (field && field->hidinput && field->hidinput->input) 1426 input_sync(field->hidinput->input); 1427 } 1428 1429 static bool mt_need_to_apply_feature(struct hid_device *hdev, 1430 struct hid_field *field, 1431 struct hid_usage *usage, 1432 enum latency_mode latency, 1433 bool surface_switch, 1434 bool button_switch, 1435 bool *inputmode_found) 1436 { 1437 struct mt_device *td = hid_get_drvdata(hdev); 1438 struct mt_class *cls = &td->mtclass; 1439 struct hid_report *report = field->report; 1440 unsigned int index = usage->usage_index; 1441 char *buf; 1442 u32 report_len; 1443 int max; 1444 1445 switch (usage->hid) { 1446 case HID_DG_INPUTMODE: 1447 /* 1448 * Some elan panels wrongly declare 2 input mode features, 1449 * and silently ignore when we set the value in the second 1450 * field. Skip the second feature and hope for the best. 1451 */ 1452 if (*inputmode_found) 1453 return false; 1454 1455 if (cls->quirks & MT_QUIRK_FORCE_GET_FEATURE) { 1456 report_len = hid_report_len(report); 1457 buf = hid_alloc_report_buf(report, GFP_KERNEL); 1458 if (!buf) { 1459 hid_err(hdev, 1460 "failed to allocate buffer for report\n"); 1461 return false; 1462 } 1463 hid_hw_raw_request(hdev, report->id, buf, report_len, 1464 HID_FEATURE_REPORT, 1465 HID_REQ_GET_REPORT); 1466 kfree(buf); 1467 } 1468 1469 field->value[index] = td->inputmode_value; 1470 *inputmode_found = true; 1471 return true; 1472 1473 case HID_DG_CONTACTMAX: 1474 if (cls->maxcontacts) { 1475 max = min_t(int, field->logical_maximum, 1476 cls->maxcontacts); 1477 if (field->value[index] != max) { 1478 field->value[index] = max; 1479 return true; 1480 } 1481 } 1482 break; 1483 1484 case HID_DG_LATENCYMODE: 1485 field->value[index] = latency; 1486 return true; 1487 1488 case HID_DG_SURFACESWITCH: 1489 field->value[index] = surface_switch; 1490 return true; 1491 1492 case HID_DG_BUTTONSWITCH: 1493 field->value[index] = button_switch; 1494 return true; 1495 } 1496 1497 return false; /* no need to update the report */ 1498 } 1499 1500 static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency, 1501 bool surface_switch, bool button_switch) 1502 { 1503 struct hid_report_enum *rep_enum; 1504 struct hid_report *rep; 1505 struct hid_usage *usage; 1506 int i, j; 1507 bool update_report; 1508 bool inputmode_found = false; 1509 1510 rep_enum = &hdev->report_enum[HID_FEATURE_REPORT]; 1511 list_for_each_entry(rep, &rep_enum->report_list, list) { 1512 update_report = false; 1513 1514 for (i = 0; i < rep->maxfield; i++) { 1515 /* Ignore if report count is out of bounds. */ 1516 if (rep->field[i]->report_count < 1) 1517 continue; 1518 1519 for (j = 0; j < rep->field[i]->maxusage; j++) { 1520 usage = &rep->field[i]->usage[j]; 1521 1522 if (mt_need_to_apply_feature(hdev, 1523 rep->field[i], 1524 usage, 1525 latency, 1526 surface_switch, 1527 button_switch, 1528 &inputmode_found)) 1529 update_report = true; 1530 } 1531 } 1532 1533 if (update_report) 1534 hid_hw_request(hdev, rep, HID_REQ_SET_REPORT); 1535 } 1536 } 1537 1538 static void mt_post_parse_default_settings(struct mt_device *td, 1539 struct mt_application *app) 1540 { 1541 __s32 quirks = app->quirks; 1542 1543 /* unknown serial device needs special quirks */ 1544 if (list_is_singular(&app->mt_usages)) { 1545 quirks |= MT_QUIRK_ALWAYS_VALID; 1546 quirks &= ~MT_QUIRK_NOT_SEEN_MEANS_UP; 1547 quirks &= ~MT_QUIRK_VALID_IS_INRANGE; 1548 quirks &= ~MT_QUIRK_VALID_IS_CONFIDENCE; 1549 quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 1550 } 1551 1552 app->quirks = quirks; 1553 } 1554 1555 static void mt_post_parse(struct mt_device *td, struct mt_application *app) 1556 { 1557 if (!app->have_contact_count) 1558 app->quirks &= ~MT_QUIRK_CONTACT_CNT_ACCURATE; 1559 } 1560 1561 static int mt_input_configured(struct hid_device *hdev, struct hid_input *hi) 1562 { 1563 struct mt_device *td = hid_get_drvdata(hdev); 1564 char *name; 1565 const char *suffix = NULL; 1566 struct mt_report_data *rdata; 1567 struct mt_application *mt_application = NULL; 1568 struct hid_report *report; 1569 int ret; 1570 1571 list_for_each_entry(report, &hi->reports, hidinput_list) { 1572 rdata = mt_find_report_data(td, report); 1573 if (!rdata) { 1574 hid_err(hdev, "failed to allocate data for report\n"); 1575 return -ENOMEM; 1576 } 1577 1578 mt_application = rdata->application; 1579 1580 if (rdata->is_mt_collection) { 1581 ret = mt_touch_input_configured(hdev, hi, 1582 mt_application); 1583 if (ret) 1584 return ret; 1585 } 1586 } 1587 1588 switch (hi->application) { 1589 case HID_GD_KEYBOARD: 1590 case HID_GD_KEYPAD: 1591 case HID_GD_MOUSE: 1592 case HID_DG_TOUCHPAD: 1593 case HID_GD_SYSTEM_CONTROL: 1594 case HID_CP_CONSUMER_CONTROL: 1595 case HID_GD_WIRELESS_RADIO_CTLS: 1596 case HID_GD_SYSTEM_MULTIAXIS: 1597 /* already handled by hid core */ 1598 break; 1599 case HID_DG_TOUCHSCREEN: 1600 /* we do not set suffix = "Touchscreen" */ 1601 hi->input->name = hdev->name; 1602 break; 1603 case HID_VD_ASUS_CUSTOM_MEDIA_KEYS: 1604 suffix = "Custom Media Keys"; 1605 break; 1606 case HID_DG_STYLUS: 1607 /* force BTN_STYLUS to allow tablet matching in udev */ 1608 __set_bit(BTN_STYLUS, hi->input->keybit); 1609 fallthrough; 1610 case HID_DG_PEN: 1611 suffix = "Stylus"; 1612 break; 1613 default: 1614 suffix = "UNKNOWN"; 1615 break; 1616 } 1617 1618 if (suffix) { 1619 name = devm_kzalloc(&hi->input->dev, 1620 strlen(hdev->name) + strlen(suffix) + 2, 1621 GFP_KERNEL); 1622 if (name) { 1623 sprintf(name, "%s %s", hdev->name, suffix); 1624 hi->input->name = name; 1625 } 1626 } 1627 1628 return 0; 1629 } 1630 1631 static void mt_fix_const_field(struct hid_field *field, unsigned int usage) 1632 { 1633 if (field->usage[0].hid != usage || 1634 !(field->flags & HID_MAIN_ITEM_CONSTANT)) 1635 return; 1636 1637 field->flags &= ~HID_MAIN_ITEM_CONSTANT; 1638 field->flags |= HID_MAIN_ITEM_VARIABLE; 1639 } 1640 1641 static void mt_fix_const_fields(struct hid_device *hdev, unsigned int usage) 1642 { 1643 struct hid_report *report; 1644 int i; 1645 1646 list_for_each_entry(report, 1647 &hdev->report_enum[HID_INPUT_REPORT].report_list, 1648 list) { 1649 1650 if (!report->maxfield) 1651 continue; 1652 1653 for (i = 0; i < report->maxfield; i++) 1654 if (report->field[i]->maxusage >= 1) 1655 mt_fix_const_field(report->field[i], usage); 1656 } 1657 } 1658 1659 static void mt_release_contacts(struct hid_device *hid) 1660 { 1661 struct hid_input *hidinput; 1662 struct mt_application *application; 1663 struct mt_device *td = hid_get_drvdata(hid); 1664 1665 list_for_each_entry(hidinput, &hid->inputs, list) { 1666 struct input_dev *input_dev = hidinput->input; 1667 struct input_mt *mt = input_dev->mt; 1668 int i; 1669 1670 if (mt) { 1671 for (i = 0; i < mt->num_slots; i++) { 1672 input_mt_slot(input_dev, i); 1673 input_mt_report_slot_inactive(input_dev); 1674 } 1675 input_mt_sync_frame(input_dev); 1676 input_sync(input_dev); 1677 } 1678 } 1679 1680 list_for_each_entry(application, &td->applications, list) { 1681 application->num_received = 0; 1682 } 1683 } 1684 1685 static void mt_expired_timeout(struct timer_list *t) 1686 { 1687 struct mt_device *td = from_timer(td, t, release_timer); 1688 struct hid_device *hdev = td->hdev; 1689 1690 /* 1691 * An input report came in just before we release the sticky fingers, 1692 * it will take care of the sticky fingers. 1693 */ 1694 if (test_and_set_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags)) 1695 return; 1696 if (test_bit(MT_IO_FLAGS_PENDING_SLOTS, &td->mt_io_flags)) 1697 mt_release_contacts(hdev); 1698 clear_bit(MT_IO_FLAGS_RUNNING, &td->mt_io_flags); 1699 } 1700 1701 static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) 1702 { 1703 int ret, i; 1704 struct mt_device *td; 1705 const struct mt_class *mtclass = mt_classes; /* MT_CLS_DEFAULT */ 1706 1707 for (i = 0; mt_classes[i].name ; i++) { 1708 if (id->driver_data == mt_classes[i].name) { 1709 mtclass = &(mt_classes[i]); 1710 break; 1711 } 1712 } 1713 1714 td = devm_kzalloc(&hdev->dev, sizeof(struct mt_device), GFP_KERNEL); 1715 if (!td) { 1716 dev_err(&hdev->dev, "cannot allocate multitouch data\n"); 1717 return -ENOMEM; 1718 } 1719 td->hdev = hdev; 1720 td->mtclass = *mtclass; 1721 td->inputmode_value = MT_INPUTMODE_TOUCHSCREEN; 1722 hid_set_drvdata(hdev, td); 1723 1724 INIT_LIST_HEAD(&td->applications); 1725 INIT_LIST_HEAD(&td->reports); 1726 1727 if (id->vendor == HID_ANY_ID && id->product == HID_ANY_ID) 1728 td->serial_maybe = true; 1729 1730 /* This allows the driver to correctly support devices 1731 * that emit events over several HID messages. 1732 */ 1733 hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; 1734 1735 /* 1736 * This allows the driver to handle different input sensors 1737 * that emits events through different applications on the same HID 1738 * device. 1739 */ 1740 hdev->quirks |= HID_QUIRK_INPUT_PER_APP; 1741 1742 if (id->group != HID_GROUP_MULTITOUCH_WIN_8) 1743 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 1744 1745 if (mtclass->quirks & MT_QUIRK_FORCE_MULTI_INPUT) { 1746 hdev->quirks &= ~HID_QUIRK_INPUT_PER_APP; 1747 hdev->quirks |= HID_QUIRK_MULTI_INPUT; 1748 } 1749 1750 timer_setup(&td->release_timer, mt_expired_timeout, 0); 1751 1752 ret = hid_parse(hdev); 1753 if (ret != 0) 1754 return ret; 1755 1756 if (mtclass->quirks & MT_QUIRK_FIX_CONST_CONTACT_ID) 1757 mt_fix_const_fields(hdev, HID_DG_CONTACTID); 1758 1759 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); 1760 if (ret) 1761 return ret; 1762 1763 ret = sysfs_create_group(&hdev->dev.kobj, &mt_attribute_group); 1764 if (ret) 1765 dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n", 1766 hdev->name); 1767 1768 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); 1769 1770 return 0; 1771 } 1772 1773 #ifdef CONFIG_PM 1774 static int mt_suspend(struct hid_device *hdev, pm_message_t state) 1775 { 1776 struct mt_device *td = hid_get_drvdata(hdev); 1777 1778 /* High latency is desirable for power savings during S3/S0ix */ 1779 if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) || 1780 !hid_hw_may_wakeup(hdev)) 1781 mt_set_modes(hdev, HID_LATENCY_HIGH, false, false); 1782 else 1783 mt_set_modes(hdev, HID_LATENCY_HIGH, true, true); 1784 1785 return 0; 1786 } 1787 1788 static int mt_reset_resume(struct hid_device *hdev) 1789 { 1790 mt_release_contacts(hdev); 1791 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); 1792 return 0; 1793 } 1794 1795 static int mt_resume(struct hid_device *hdev) 1796 { 1797 /* Some Elan legacy devices require SET_IDLE to be set on resume. 1798 * It should be safe to send it to other devices too. 1799 * Tested on 3M, Stantum, Cypress, Zytronic, eGalax, and Elan panels. */ 1800 1801 hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE); 1802 1803 mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); 1804 1805 return 0; 1806 } 1807 #endif 1808 1809 static void mt_remove(struct hid_device *hdev) 1810 { 1811 struct mt_device *td = hid_get_drvdata(hdev); 1812 1813 del_timer_sync(&td->release_timer); 1814 1815 sysfs_remove_group(&hdev->dev.kobj, &mt_attribute_group); 1816 hid_hw_stop(hdev); 1817 } 1818 1819 /* 1820 * This list contains only: 1821 * - VID/PID of products not working with the default multitouch handling 1822 * - 2 generic rules. 1823 * So there is no point in adding here any device with MT_CLS_DEFAULT. 1824 */ 1825 static const struct hid_device_id mt_devices[] = { 1826 1827 /* 3M panels */ 1828 { .driver_data = MT_CLS_3M, 1829 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1830 USB_DEVICE_ID_3M1968) }, 1831 { .driver_data = MT_CLS_3M, 1832 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1833 USB_DEVICE_ID_3M2256) }, 1834 { .driver_data = MT_CLS_3M, 1835 MT_USB_DEVICE(USB_VENDOR_ID_3M, 1836 USB_DEVICE_ID_3M3266) }, 1837 1838 /* Anton devices */ 1839 { .driver_data = MT_CLS_EXPORT_ALL_INPUTS, 1840 MT_USB_DEVICE(USB_VENDOR_ID_ANTON, 1841 USB_DEVICE_ID_ANTON_TOUCH_PAD) }, 1842 1843 /* Asus T101HA */ 1844 { .driver_data = MT_CLS_WIN_8_DISABLE_WAKEUP, 1845 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, 1846 USB_VENDOR_ID_ASUSTEK, 1847 USB_DEVICE_ID_ASUSTEK_T101HA_KEYBOARD) }, 1848 1849 /* Asus T304UA */ 1850 { .driver_data = MT_CLS_ASUS, 1851 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, 1852 USB_VENDOR_ID_ASUSTEK, 1853 USB_DEVICE_ID_ASUSTEK_T304_KEYBOARD) }, 1854 1855 /* Atmel panels */ 1856 { .driver_data = MT_CLS_SERIAL, 1857 MT_USB_DEVICE(USB_VENDOR_ID_ATMEL, 1858 USB_DEVICE_ID_ATMEL_MXT_DIGITIZER) }, 1859 1860 /* Baanto multitouch devices */ 1861 { .driver_data = MT_CLS_NSMU, 1862 MT_USB_DEVICE(USB_VENDOR_ID_BAANTO, 1863 USB_DEVICE_ID_BAANTO_MT_190W2) }, 1864 1865 /* Cando panels */ 1866 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 1867 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 1868 USB_DEVICE_ID_CANDO_MULTI_TOUCH) }, 1869 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTNUMBER, 1870 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 1871 USB_DEVICE_ID_CANDO_MULTI_TOUCH_15_6) }, 1872 1873 /* Chunghwa Telecom touch panels */ 1874 { .driver_data = MT_CLS_NSMU, 1875 MT_USB_DEVICE(USB_VENDOR_ID_CHUNGHWAT, 1876 USB_DEVICE_ID_CHUNGHWAT_MULTITOUCH) }, 1877 1878 /* CJTouch panels */ 1879 { .driver_data = MT_CLS_NSMU, 1880 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH, 1881 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0020) }, 1882 { .driver_data = MT_CLS_NSMU, 1883 MT_USB_DEVICE(USB_VENDOR_ID_CJTOUCH, 1884 USB_DEVICE_ID_CJTOUCH_MULTI_TOUCH_0040) }, 1885 1886 /* CVTouch panels */ 1887 { .driver_data = MT_CLS_NSMU, 1888 MT_USB_DEVICE(USB_VENDOR_ID_CVTOUCH, 1889 USB_DEVICE_ID_CVTOUCH_SCREEN) }, 1890 1891 /* eGalax devices (resistive) */ 1892 { .driver_data = MT_CLS_EGALAX, 1893 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1894 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480D) }, 1895 { .driver_data = MT_CLS_EGALAX, 1896 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1897 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_480E) }, 1898 1899 /* eGalax devices (capacitive) */ 1900 { .driver_data = MT_CLS_EGALAX_SERIAL, 1901 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1902 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7207) }, 1903 { .driver_data = MT_CLS_EGALAX, 1904 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1905 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_720C) }, 1906 { .driver_data = MT_CLS_EGALAX_SERIAL, 1907 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1908 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7224) }, 1909 { .driver_data = MT_CLS_EGALAX_SERIAL, 1910 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1911 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_722A) }, 1912 { .driver_data = MT_CLS_EGALAX_SERIAL, 1913 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1914 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_725E) }, 1915 { .driver_data = MT_CLS_EGALAX_SERIAL, 1916 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1917 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7262) }, 1918 { .driver_data = MT_CLS_EGALAX, 1919 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1920 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_726B) }, 1921 { .driver_data = MT_CLS_EGALAX, 1922 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1923 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72A1) }, 1924 { .driver_data = MT_CLS_EGALAX_SERIAL, 1925 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1926 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72AA) }, 1927 { .driver_data = MT_CLS_EGALAX, 1928 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 1929 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72C4) }, 1930 { .driver_data = MT_CLS_EGALAX, 1931 HID_USB_DEVICE(USB_VENDOR_ID_DWAV, 1932 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72D0) }, 1933 { .driver_data = MT_CLS_EGALAX, 1934 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1935 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_72FA) }, 1936 { .driver_data = MT_CLS_EGALAX, 1937 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1938 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7302) }, 1939 { .driver_data = MT_CLS_EGALAX_SERIAL, 1940 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1941 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_7349) }, 1942 { .driver_data = MT_CLS_EGALAX_SERIAL, 1943 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1944 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_73F7) }, 1945 { .driver_data = MT_CLS_EGALAX_SERIAL, 1946 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1947 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_A001) }, 1948 { .driver_data = MT_CLS_EGALAX, 1949 MT_USB_DEVICE(USB_VENDOR_ID_DWAV, 1950 USB_DEVICE_ID_DWAV_EGALAX_MULTITOUCH_C002) }, 1951 1952 /* Elan devices */ 1953 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 1954 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 1955 USB_VENDOR_ID_ELAN, 0x313a) }, 1956 1957 /* Elitegroup panel */ 1958 { .driver_data = MT_CLS_SERIAL, 1959 MT_USB_DEVICE(USB_VENDOR_ID_ELITEGROUP, 1960 USB_DEVICE_ID_ELITEGROUP_05D8) }, 1961 1962 /* Flatfrog Panels */ 1963 { .driver_data = MT_CLS_FLATFROG, 1964 MT_USB_DEVICE(USB_VENDOR_ID_FLATFROG, 1965 USB_DEVICE_ID_MULTITOUCH_3200) }, 1966 1967 /* FocalTech Panels */ 1968 { .driver_data = MT_CLS_SERIAL, 1969 MT_USB_DEVICE(USB_VENDOR_ID_CYGNAL, 1970 USB_DEVICE_ID_FOCALTECH_FTXXXX_MULTITOUCH) }, 1971 1972 /* GeneralTouch panel */ 1973 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS, 1974 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1975 USB_DEVICE_ID_GENERAL_TOUCH_WIN7_TWOFINGERS) }, 1976 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1977 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1978 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PWT_TENFINGERS) }, 1979 { .driver_data = MT_CLS_GENERALTOUCH_TWOFINGERS, 1980 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1981 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0101) }, 1982 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1983 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1984 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0102) }, 1985 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1986 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1987 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_0106) }, 1988 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1989 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1990 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_010A) }, 1991 { .driver_data = MT_CLS_GENERALTOUCH_PWT_TENFINGERS, 1992 MT_USB_DEVICE(USB_VENDOR_ID_GENERAL_TOUCH, 1993 USB_DEVICE_ID_GENERAL_TOUCH_WIN8_PIT_E100) }, 1994 1995 /* Gametel game controller */ 1996 { .driver_data = MT_CLS_NSMU, 1997 MT_BT_DEVICE(USB_VENDOR_ID_FRUCTEL, 1998 USB_DEVICE_ID_GAMETEL_MT_MODE) }, 1999 2000 /* GoodTouch panels */ 2001 { .driver_data = MT_CLS_NSMU, 2002 MT_USB_DEVICE(USB_VENDOR_ID_GOODTOUCH, 2003 USB_DEVICE_ID_GOODTOUCH_000f) }, 2004 2005 /* Hanvon panels */ 2006 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 2007 MT_USB_DEVICE(USB_VENDOR_ID_HANVON_ALT, 2008 USB_DEVICE_ID_HANVON_ALT_MULTITOUCH) }, 2009 2010 /* Ilitek dual touch panel */ 2011 { .driver_data = MT_CLS_NSMU, 2012 MT_USB_DEVICE(USB_VENDOR_ID_ILITEK, 2013 USB_DEVICE_ID_ILITEK_MULTITOUCH) }, 2014 2015 /* LG Melfas panel */ 2016 { .driver_data = MT_CLS_LG, 2017 HID_USB_DEVICE(USB_VENDOR_ID_LG, 2018 USB_DEVICE_ID_LG_MELFAS_MT) }, 2019 { .driver_data = MT_CLS_LG, 2020 HID_DEVICE(BUS_I2C, HID_GROUP_GENERIC, 2021 USB_VENDOR_ID_LG, I2C_DEVICE_ID_LG_7010) }, 2022 2023 /* Lenovo X1 TAB Gen 2 */ 2024 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 2025 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, 2026 USB_VENDOR_ID_LENOVO, 2027 USB_DEVICE_ID_LENOVO_X1_TAB) }, 2028 2029 /* Lenovo X1 TAB Gen 3 */ 2030 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 2031 HID_DEVICE(BUS_USB, HID_GROUP_MULTITOUCH_WIN_8, 2032 USB_VENDOR_ID_LENOVO, 2033 USB_DEVICE_ID_LENOVO_X1_TAB3) }, 2034 2035 /* MosArt panels */ 2036 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 2037 MT_USB_DEVICE(USB_VENDOR_ID_ASUS, 2038 USB_DEVICE_ID_ASUS_T91MT)}, 2039 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 2040 MT_USB_DEVICE(USB_VENDOR_ID_ASUS, 2041 USB_DEVICE_ID_ASUSTEK_MULTITOUCH_YFO) }, 2042 { .driver_data = MT_CLS_CONFIDENCE_MINUS_ONE, 2043 MT_USB_DEVICE(USB_VENDOR_ID_TURBOX, 2044 USB_DEVICE_ID_TURBOX_TOUCHSCREEN_MOSART) }, 2045 2046 /* Novatek Panel */ 2047 { .driver_data = MT_CLS_NSMU, 2048 MT_USB_DEVICE(USB_VENDOR_ID_NOVATEK, 2049 USB_DEVICE_ID_NOVATEK_PCT) }, 2050 2051 /* Ntrig Panel */ 2052 { .driver_data = MT_CLS_NSMU, 2053 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 2054 USB_VENDOR_ID_NTRIG, 0x1b05) }, 2055 2056 /* Panasonic panels */ 2057 { .driver_data = MT_CLS_PANASONIC, 2058 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 2059 USB_DEVICE_ID_PANABOARD_UBT780) }, 2060 { .driver_data = MT_CLS_PANASONIC, 2061 MT_USB_DEVICE(USB_VENDOR_ID_PANASONIC, 2062 USB_DEVICE_ID_PANABOARD_UBT880) }, 2063 2064 /* PixArt optical touch screen */ 2065 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 2066 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 2067 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN) }, 2068 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 2069 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 2070 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN1) }, 2071 { .driver_data = MT_CLS_INRANGE_CONTACTNUMBER, 2072 MT_USB_DEVICE(USB_VENDOR_ID_PIXART, 2073 USB_DEVICE_ID_PIXART_OPTICAL_TOUCH_SCREEN2) }, 2074 2075 /* PixCir-based panels */ 2076 { .driver_data = MT_CLS_DUAL_INRANGE_CONTACTID, 2077 MT_USB_DEVICE(USB_VENDOR_ID_CANDO, 2078 USB_DEVICE_ID_CANDO_PIXCIR_MULTI_TOUCH) }, 2079 2080 /* Quanta-based panels */ 2081 { .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID, 2082 MT_USB_DEVICE(USB_VENDOR_ID_QUANTA, 2083 USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) }, 2084 2085 /* Razer touchpads */ 2086 { .driver_data = MT_CLS_RAZER_BLADE_STEALTH, 2087 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 2088 USB_VENDOR_ID_SYNAPTICS, 0x8323) }, 2089 2090 /* Smart Tech panels */ 2091 { .driver_data = MT_CLS_SMART_TECH, 2092 MT_USB_DEVICE(0x0b8c, 0x0092)}, 2093 2094 /* Stantum panels */ 2095 { .driver_data = MT_CLS_CONFIDENCE, 2096 MT_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM, 2097 USB_DEVICE_ID_MTP_STM)}, 2098 2099 /* Synaptics devices */ 2100 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 2101 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 2102 USB_VENDOR_ID_SYNAPTICS, 0xce08) }, 2103 2104 { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, 2105 HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, 2106 USB_VENDOR_ID_SYNAPTICS, 0xce09) }, 2107 2108 /* TopSeed panels */ 2109 { .driver_data = MT_CLS_TOPSEED, 2110 MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, 2111 USB_DEVICE_ID_TOPSEED2_PERIPAD_701) }, 2112 2113 /* Touch International panels */ 2114 { .driver_data = MT_CLS_NSMU, 2115 MT_USB_DEVICE(USB_VENDOR_ID_TOUCH_INTL, 2116 USB_DEVICE_ID_TOUCH_INTL_MULTI_TOUCH) }, 2117 2118 /* Unitec panels */ 2119 { .driver_data = MT_CLS_NSMU, 2120 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC, 2121 USB_DEVICE_ID_UNITEC_USB_TOUCH_0709) }, 2122 { .driver_data = MT_CLS_NSMU, 2123 MT_USB_DEVICE(USB_VENDOR_ID_UNITEC, 2124 USB_DEVICE_ID_UNITEC_USB_TOUCH_0A19) }, 2125 2126 /* VTL panels */ 2127 { .driver_data = MT_CLS_VTL, 2128 MT_USB_DEVICE(USB_VENDOR_ID_VTL, 2129 USB_DEVICE_ID_VTL_MULTITOUCH_FF3F) }, 2130 2131 /* Winbond Electronics Corp. */ 2132 { .driver_data = MT_CLS_WIN_8_NO_STICKY_FINGERS, 2133 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8, 2134 USB_VENDOR_ID_WINBOND, USB_DEVICE_ID_TSTP_MTOUCH) }, 2135 2136 /* Wistron panels */ 2137 { .driver_data = MT_CLS_NSMU, 2138 MT_USB_DEVICE(USB_VENDOR_ID_WISTRON, 2139 USB_DEVICE_ID_WISTRON_OPTICAL_TOUCH) }, 2140 2141 /* XAT */ 2142 { .driver_data = MT_CLS_NSMU, 2143 MT_USB_DEVICE(USB_VENDOR_ID_XAT, 2144 USB_DEVICE_ID_XAT_CSR) }, 2145 2146 /* Xiroku */ 2147 { .driver_data = MT_CLS_NSMU, 2148 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2149 USB_DEVICE_ID_XIROKU_SPX) }, 2150 { .driver_data = MT_CLS_NSMU, 2151 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2152 USB_DEVICE_ID_XIROKU_MPX) }, 2153 { .driver_data = MT_CLS_NSMU, 2154 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2155 USB_DEVICE_ID_XIROKU_CSR) }, 2156 { .driver_data = MT_CLS_NSMU, 2157 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2158 USB_DEVICE_ID_XIROKU_SPX1) }, 2159 { .driver_data = MT_CLS_NSMU, 2160 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2161 USB_DEVICE_ID_XIROKU_MPX1) }, 2162 { .driver_data = MT_CLS_NSMU, 2163 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2164 USB_DEVICE_ID_XIROKU_CSR1) }, 2165 { .driver_data = MT_CLS_NSMU, 2166 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2167 USB_DEVICE_ID_XIROKU_SPX2) }, 2168 { .driver_data = MT_CLS_NSMU, 2169 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2170 USB_DEVICE_ID_XIROKU_MPX2) }, 2171 { .driver_data = MT_CLS_NSMU, 2172 MT_USB_DEVICE(USB_VENDOR_ID_XIROKU, 2173 USB_DEVICE_ID_XIROKU_CSR2) }, 2174 2175 /* Google MT devices */ 2176 { .driver_data = MT_CLS_GOOGLE, 2177 HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY, USB_VENDOR_ID_GOOGLE, 2178 USB_DEVICE_ID_GOOGLE_TOUCH_ROSE) }, 2179 2180 /* Generic MT device */ 2181 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH, HID_ANY_ID, HID_ANY_ID) }, 2182 2183 /* Generic Win 8 certified MT device */ 2184 { .driver_data = MT_CLS_WIN_8, 2185 HID_DEVICE(HID_BUS_ANY, HID_GROUP_MULTITOUCH_WIN_8, 2186 HID_ANY_ID, HID_ANY_ID) }, 2187 { } 2188 }; 2189 MODULE_DEVICE_TABLE(hid, mt_devices); 2190 2191 static const struct hid_usage_id mt_grabbed_usages[] = { 2192 { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID }, 2193 { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1} 2194 }; 2195 2196 static struct hid_driver mt_driver = { 2197 .name = "hid-multitouch", 2198 .id_table = mt_devices, 2199 .probe = mt_probe, 2200 .remove = mt_remove, 2201 .input_mapping = mt_input_mapping, 2202 .input_mapped = mt_input_mapped, 2203 .input_configured = mt_input_configured, 2204 .feature_mapping = mt_feature_mapping, 2205 .usage_table = mt_grabbed_usages, 2206 .event = mt_event, 2207 .report = mt_report, 2208 #ifdef CONFIG_PM 2209 .suspend = mt_suspend, 2210 .reset_resume = mt_reset_resume, 2211 .resume = mt_resume, 2212 #endif 2213 }; 2214 module_hid_driver(mt_driver); 2215