1 /*- 2 * Copyright (c) 2014 Jakub Wojciech Klama <jceel@FreeBSD.org> 3 * Copyright (c) 2015-2016 Vladimir Kondratyev <wulf@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include "opt_evdev.h" 31 32 #include <sys/param.h> 33 #include <sys/bitstring.h> 34 #include <sys/conf.h> 35 #include <sys/kdb.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/proc.h> 40 #include <sys/sysctl.h> 41 #include <sys/systm.h> 42 43 #include <dev/evdev/evdev.h> 44 #include <dev/evdev/evdev_private.h> 45 #include <dev/evdev/input.h> 46 47 #ifdef EVDEV_DEBUG 48 #define debugf(evdev, fmt, args...) printf("evdev: " fmt "\n", ##args) 49 #else 50 #define debugf(evdev, fmt, args...) 51 #endif 52 53 #ifdef FEATURE 54 FEATURE(evdev, "Input event devices support"); 55 #ifdef EVDEV_SUPPORT 56 FEATURE(evdev_support, "Evdev support in hybrid drivers"); 57 #endif 58 #endif 59 60 enum evdev_sparse_result 61 { 62 EV_SKIP_EVENT, /* Event value not changed */ 63 EV_REPORT_EVENT, /* Event value changed */ 64 EV_REPORT_MT_SLOT, /* Event value and MT slot number changed */ 65 }; 66 67 MALLOC_DEFINE(M_EVDEV, "evdev", "evdev memory"); 68 69 int evdev_rcpt_mask = EVDEV_RCPT_SYSMOUSE | EVDEV_RCPT_KBDMUX; 70 int evdev_sysmouse_t_axis = 0; 71 72 #ifdef EVDEV_SUPPORT 73 SYSCTL_NODE(_kern, OID_AUTO, evdev, CTLFLAG_RW, 0, "Evdev args"); 74 SYSCTL_INT(_kern_evdev, OID_AUTO, rcpt_mask, CTLFLAG_RW, &evdev_rcpt_mask, 0, 75 "Who is receiving events: bit0 - sysmouse, bit1 - kbdmux, " 76 "bit2 - mouse hardware, bit3 - keyboard hardware"); 77 SYSCTL_INT(_kern_evdev, OID_AUTO, sysmouse_t_axis, CTLFLAG_RW, 78 &evdev_sysmouse_t_axis, 0, "Extract T-axis from 0-none, 1-ums, 2-psm"); 79 #endif 80 81 static void evdev_start_repeat(struct evdev_dev *, uint16_t); 82 static void evdev_stop_repeat(struct evdev_dev *); 83 static int evdev_check_event(struct evdev_dev *, uint16_t, uint16_t, int32_t); 84 85 static inline void 86 bit_change(bitstr_t *bitstr, int bit, int value) 87 { 88 if (value) 89 bit_set(bitstr, bit); 90 else 91 bit_clear(bitstr, bit); 92 } 93 94 struct evdev_dev * 95 evdev_alloc(void) 96 { 97 98 return malloc(sizeof(struct evdev_dev), M_EVDEV, M_WAITOK | M_ZERO); 99 } 100 101 void 102 evdev_free(struct evdev_dev *evdev) 103 { 104 105 if (evdev != NULL && evdev->ev_cdev != NULL && 106 evdev->ev_cdev->si_drv1 != NULL) 107 evdev_unregister(evdev); 108 109 free(evdev, M_EVDEV); 110 } 111 112 static struct input_absinfo * 113 evdev_alloc_absinfo(void) 114 { 115 116 return (malloc(sizeof(struct input_absinfo) * ABS_CNT, M_EVDEV, 117 M_WAITOK | M_ZERO)); 118 } 119 120 static void 121 evdev_free_absinfo(struct input_absinfo *absinfo) 122 { 123 124 free(absinfo, M_EVDEV); 125 } 126 127 int 128 evdev_set_report_size(struct evdev_dev *evdev, size_t report_size) 129 { 130 if (report_size > KEY_CNT + REL_CNT + ABS_CNT + MAX_MT_SLOTS * MT_CNT + 131 MSC_CNT + LED_CNT + SND_CNT + SW_CNT + FF_CNT) 132 return (EINVAL); 133 134 evdev->ev_report_size = report_size; 135 return (0); 136 } 137 138 static size_t 139 evdev_estimate_report_size(struct evdev_dev *evdev) 140 { 141 size_t size = 0; 142 int res; 143 144 /* 145 * Keyboards generate one event per report but other devices with 146 * buttons like mouses can report events simultaneously 147 */ 148 bit_ffs_at(evdev->ev_key_flags, KEY_OK, KEY_CNT - KEY_OK, &res); 149 if (res == -1) 150 bit_ffs(evdev->ev_key_flags, BTN_MISC, &res); 151 size += (res != -1); 152 bit_count(evdev->ev_key_flags, BTN_MISC, KEY_OK - BTN_MISC, &res); 153 size += res; 154 155 /* All relative axes can be reported simultaneously */ 156 bit_count(evdev->ev_rel_flags, 0, REL_CNT, &res); 157 size += res; 158 159 /* 160 * All absolute axes can be reported simultaneously. 161 * Multitouch axes can be reported ABS_MT_SLOT times 162 */ 163 if (evdev->ev_absinfo != NULL) { 164 bit_count(evdev->ev_abs_flags, 0, ABS_CNT, &res); 165 size += res; 166 bit_count(evdev->ev_abs_flags, ABS_MT_FIRST, MT_CNT, &res); 167 if (res > 0) { 168 res++; /* ABS_MT_SLOT or SYN_MT_REPORT */ 169 if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 170 /* MT type B */ 171 size += res * MAXIMAL_MT_SLOT(evdev); 172 else 173 /* MT type A */ 174 size += res * (MAX_MT_REPORTS - 1); 175 } 176 } 177 178 /* All misc events can be reported simultaneously */ 179 bit_count(evdev->ev_msc_flags, 0, MSC_CNT, &res); 180 size += res; 181 182 /* All leds can be reported simultaneously */ 183 bit_count(evdev->ev_led_flags, 0, LED_CNT, &res); 184 size += res; 185 186 /* Assume other events are generated once per report */ 187 bit_ffs(evdev->ev_snd_flags, SND_CNT, &res); 188 size += (res != -1); 189 190 bit_ffs(evdev->ev_sw_flags, SW_CNT, &res); 191 size += (res != -1); 192 193 /* XXX: FF part is not implemented yet */ 194 195 size++; /* SYN_REPORT */ 196 return (size); 197 } 198 199 static int 200 evdev_register_common(struct evdev_dev *evdev) 201 { 202 int ret; 203 204 debugf(evdev, "%s: registered evdev provider: %s <%s>\n", 205 evdev->ev_shortname, evdev->ev_name, evdev->ev_serial); 206 207 /* Initialize internal structures */ 208 LIST_INIT(&evdev->ev_clients); 209 210 if (evdev_event_supported(evdev, EV_REP) && 211 bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) { 212 /* Initialize callout */ 213 callout_init_mtx(&evdev->ev_rep_callout, &evdev->ev_mtx, 0); 214 215 if (evdev->ev_rep[REP_DELAY] == 0 && 216 evdev->ev_rep[REP_PERIOD] == 0) { 217 /* Supply default values */ 218 evdev->ev_rep[REP_DELAY] = 250; 219 evdev->ev_rep[REP_PERIOD] = 33; 220 } 221 } 222 223 /* Initialize multitouch protocol type B states */ 224 if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT) && 225 evdev->ev_absinfo != NULL && MAXIMAL_MT_SLOT(evdev) > 0) 226 evdev_mt_init(evdev); 227 228 /* Estimate maximum report size */ 229 if (evdev->ev_report_size == 0) { 230 ret = evdev_set_report_size(evdev, 231 evdev_estimate_report_size(evdev)); 232 if (ret != 0) 233 goto bail_out; 234 } 235 236 /* Create char device node */ 237 ret = evdev_cdev_create(evdev); 238 bail_out: 239 return (ret); 240 } 241 242 int 243 evdev_register(struct evdev_dev *evdev) 244 { 245 int ret; 246 247 evdev->ev_lock_type = EV_LOCK_INTERNAL; 248 evdev->ev_lock = &evdev->ev_mtx; 249 mtx_init(&evdev->ev_mtx, "evmtx", NULL, MTX_DEF); 250 251 ret = evdev_register_common(evdev); 252 if (ret != 0) 253 mtx_destroy(&evdev->ev_mtx); 254 255 return (ret); 256 } 257 258 int 259 evdev_register_mtx(struct evdev_dev *evdev, struct mtx *mtx) 260 { 261 262 evdev->ev_lock_type = EV_LOCK_MTX; 263 evdev->ev_lock = mtx; 264 return (evdev_register_common(evdev)); 265 } 266 267 int 268 evdev_unregister(struct evdev_dev *evdev) 269 { 270 struct evdev_client *client; 271 int ret; 272 debugf(evdev, "%s: unregistered evdev provider: %s\n", 273 evdev->ev_shortname, evdev->ev_name); 274 275 EVDEV_LOCK(evdev); 276 evdev->ev_cdev->si_drv1 = NULL; 277 /* Wake up sleepers */ 278 LIST_FOREACH(client, &evdev->ev_clients, ec_link) { 279 evdev_revoke_client(client); 280 evdev_dispose_client(evdev, client); 281 EVDEV_CLIENT_LOCKQ(client); 282 evdev_notify_event(client); 283 EVDEV_CLIENT_UNLOCKQ(client); 284 } 285 EVDEV_UNLOCK(evdev); 286 287 /* destroy_dev can sleep so release lock */ 288 ret = evdev_cdev_destroy(evdev); 289 evdev->ev_cdev = NULL; 290 if (ret == 0 && evdev->ev_lock_type == EV_LOCK_INTERNAL) 291 mtx_destroy(&evdev->ev_mtx); 292 293 evdev_free_absinfo(evdev->ev_absinfo); 294 evdev_mt_free(evdev); 295 296 return (ret); 297 } 298 299 inline void 300 evdev_set_name(struct evdev_dev *evdev, const char *name) 301 { 302 303 snprintf(evdev->ev_name, NAMELEN, "%s", name); 304 } 305 306 inline void 307 evdev_set_id(struct evdev_dev *evdev, uint16_t bustype, uint16_t vendor, 308 uint16_t product, uint16_t version) 309 { 310 311 evdev->ev_id = (struct input_id) { 312 .bustype = bustype, 313 .vendor = vendor, 314 .product = product, 315 .version = version 316 }; 317 } 318 319 inline void 320 evdev_set_phys(struct evdev_dev *evdev, const char *name) 321 { 322 323 snprintf(evdev->ev_shortname, NAMELEN, "%s", name); 324 } 325 326 inline void 327 evdev_set_serial(struct evdev_dev *evdev, const char *serial) 328 { 329 330 snprintf(evdev->ev_serial, NAMELEN, "%s", serial); 331 } 332 333 inline void 334 evdev_set_methods(struct evdev_dev *evdev, void *softc, 335 const struct evdev_methods *methods) 336 { 337 338 evdev->ev_methods = methods; 339 evdev->ev_softc = softc; 340 } 341 342 inline void * 343 evdev_get_softc(struct evdev_dev *evdev) 344 { 345 346 return (evdev->ev_softc); 347 } 348 349 inline void 350 evdev_support_prop(struct evdev_dev *evdev, uint16_t prop) 351 { 352 353 KASSERT(prop < INPUT_PROP_CNT, ("invalid evdev input property")); 354 bit_set(evdev->ev_prop_flags, prop); 355 } 356 357 inline void 358 evdev_support_event(struct evdev_dev *evdev, uint16_t type) 359 { 360 361 KASSERT(type < EV_CNT, ("invalid evdev event property")); 362 bit_set(evdev->ev_type_flags, type); 363 } 364 365 inline void 366 evdev_support_key(struct evdev_dev *evdev, uint16_t code) 367 { 368 369 KASSERT(code < KEY_CNT, ("invalid evdev key property")); 370 bit_set(evdev->ev_key_flags, code); 371 } 372 373 inline void 374 evdev_support_rel(struct evdev_dev *evdev, uint16_t code) 375 { 376 377 KASSERT(code < REL_CNT, ("invalid evdev rel property")); 378 bit_set(evdev->ev_rel_flags, code); 379 } 380 381 inline void 382 evdev_support_abs(struct evdev_dev *evdev, uint16_t code, int32_t value, 383 int32_t minimum, int32_t maximum, int32_t fuzz, int32_t flat, 384 int32_t resolution) 385 { 386 struct input_absinfo absinfo; 387 388 KASSERT(code < ABS_CNT, ("invalid evdev abs property")); 389 390 absinfo = (struct input_absinfo) { 391 .value = value, 392 .minimum = minimum, 393 .maximum = maximum, 394 .fuzz = fuzz, 395 .flat = flat, 396 .resolution = resolution, 397 }; 398 evdev_set_abs_bit(evdev, code); 399 evdev_set_absinfo(evdev, code, &absinfo); 400 } 401 402 inline void 403 evdev_set_abs_bit(struct evdev_dev *evdev, uint16_t code) 404 { 405 406 KASSERT(code < ABS_CNT, ("invalid evdev abs property")); 407 if (evdev->ev_absinfo == NULL) 408 evdev->ev_absinfo = evdev_alloc_absinfo(); 409 bit_set(evdev->ev_abs_flags, code); 410 } 411 412 inline void 413 evdev_support_msc(struct evdev_dev *evdev, uint16_t code) 414 { 415 416 KASSERT(code < MSC_CNT, ("invalid evdev msc property")); 417 bit_set(evdev->ev_msc_flags, code); 418 } 419 420 421 inline void 422 evdev_support_led(struct evdev_dev *evdev, uint16_t code) 423 { 424 425 KASSERT(code < LED_CNT, ("invalid evdev led property")); 426 bit_set(evdev->ev_led_flags, code); 427 } 428 429 inline void 430 evdev_support_snd(struct evdev_dev *evdev, uint16_t code) 431 { 432 433 KASSERT(code < SND_CNT, ("invalid evdev snd property")); 434 bit_set(evdev->ev_snd_flags, code); 435 } 436 437 inline void 438 evdev_support_sw(struct evdev_dev *evdev, uint16_t code) 439 { 440 441 KASSERT(code < SW_CNT, ("invalid evdev sw property")); 442 bit_set(evdev->ev_sw_flags, code); 443 } 444 445 bool 446 evdev_event_supported(struct evdev_dev *evdev, uint16_t type) 447 { 448 449 KASSERT(type < EV_CNT, ("invalid evdev event property")); 450 return (bit_test(evdev->ev_type_flags, type)); 451 } 452 453 inline void 454 evdev_set_absinfo(struct evdev_dev *evdev, uint16_t axis, 455 struct input_absinfo *absinfo) 456 { 457 458 KASSERT(axis < ABS_CNT, ("invalid evdev abs property")); 459 460 if (axis == ABS_MT_SLOT && 461 (absinfo->maximum < 1 || absinfo->maximum >= MAX_MT_SLOTS)) 462 return; 463 464 if (evdev->ev_absinfo == NULL) 465 evdev->ev_absinfo = evdev_alloc_absinfo(); 466 467 if (axis == ABS_MT_SLOT) 468 evdev->ev_absinfo[ABS_MT_SLOT].maximum = absinfo->maximum; 469 else 470 memcpy(&evdev->ev_absinfo[axis], absinfo, 471 sizeof(struct input_absinfo)); 472 } 473 474 inline void 475 evdev_set_repeat_params(struct evdev_dev *evdev, uint16_t property, int value) 476 { 477 478 KASSERT(property < REP_CNT, ("invalid evdev repeat property")); 479 evdev->ev_rep[property] = value; 480 } 481 482 inline void 483 evdev_set_flag(struct evdev_dev *evdev, uint16_t flag) 484 { 485 486 KASSERT(flag < EVDEV_FLAG_CNT, ("invalid evdev flag property")); 487 bit_set(evdev->ev_flags, flag); 488 } 489 490 static int 491 evdev_check_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 492 int32_t value) 493 { 494 495 if (type >= EV_CNT) 496 return (EINVAL); 497 498 /* Allow SYN events implicitly */ 499 if (type != EV_SYN && !evdev_event_supported(evdev, type)) 500 return (EINVAL); 501 502 switch (type) { 503 case EV_SYN: 504 if (code >= SYN_CNT) 505 return (EINVAL); 506 break; 507 508 case EV_KEY: 509 if (code >= KEY_CNT) 510 return (EINVAL); 511 if (!bit_test(evdev->ev_key_flags, code)) 512 return (EINVAL); 513 break; 514 515 case EV_REL: 516 if (code >= REL_CNT) 517 return (EINVAL); 518 if (!bit_test(evdev->ev_rel_flags, code)) 519 return (EINVAL); 520 break; 521 522 case EV_ABS: 523 if (code >= ABS_CNT) 524 return (EINVAL); 525 if (!bit_test(evdev->ev_abs_flags, code)) 526 return (EINVAL); 527 if (code == ABS_MT_SLOT && 528 (value < 0 || value > MAXIMAL_MT_SLOT(evdev))) 529 return (EINVAL); 530 if (ABS_IS_MT(code) && evdev->ev_mt == NULL && 531 bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 532 return (EINVAL); 533 break; 534 535 case EV_MSC: 536 if (code >= MSC_CNT) 537 return (EINVAL); 538 if (!bit_test(evdev->ev_msc_flags, code)) 539 return (EINVAL); 540 break; 541 542 case EV_LED: 543 if (code >= LED_CNT) 544 return (EINVAL); 545 if (!bit_test(evdev->ev_led_flags, code)) 546 return (EINVAL); 547 break; 548 549 case EV_SND: 550 if (code >= SND_CNT) 551 return (EINVAL); 552 if (!bit_test(evdev->ev_snd_flags, code)) 553 return (EINVAL); 554 break; 555 556 case EV_SW: 557 if (code >= SW_CNT) 558 return (EINVAL); 559 if (!bit_test(evdev->ev_sw_flags, code)) 560 return (EINVAL); 561 break; 562 563 case EV_REP: 564 if (code >= REP_CNT) 565 return (EINVAL); 566 break; 567 568 default: 569 return (EINVAL); 570 } 571 572 return (0); 573 } 574 575 static void 576 evdev_modify_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 577 int32_t *value) 578 { 579 580 EVDEV_LOCK_ASSERT(evdev); 581 582 switch (type) { 583 case EV_KEY: 584 if (!evdev_event_supported(evdev, EV_REP)) 585 break; 586 587 if (!bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) { 588 /* Detect driver key repeats. */ 589 if (bit_test(evdev->ev_key_states, code) && 590 *value == KEY_EVENT_DOWN) 591 *value = KEY_EVENT_REPEAT; 592 } else { 593 /* Start/stop callout for evdev repeats */ 594 if (bit_test(evdev->ev_key_states, code) == !*value && 595 !LIST_EMPTY(&evdev->ev_clients)) { 596 if (*value == KEY_EVENT_DOWN) 597 evdev_start_repeat(evdev, code); 598 else 599 evdev_stop_repeat(evdev); 600 } 601 } 602 break; 603 604 case EV_ABS: 605 /* TBD: implement fuzz */ 606 break; 607 } 608 } 609 610 static enum evdev_sparse_result 611 evdev_sparse_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 612 int32_t value) 613 { 614 int32_t last_mt_slot; 615 616 EVDEV_LOCK_ASSERT(evdev); 617 618 /* 619 * For certain event types, update device state bits 620 * and convert level reporting to edge reporting 621 */ 622 switch (type) { 623 case EV_KEY: 624 switch (value) { 625 case KEY_EVENT_UP: 626 case KEY_EVENT_DOWN: 627 if (bit_test(evdev->ev_key_states, code) == value) 628 return (EV_SKIP_EVENT); 629 bit_change(evdev->ev_key_states, code, value); 630 break; 631 632 case KEY_EVENT_REPEAT: 633 if (bit_test(evdev->ev_key_states, code) == 0 || 634 !evdev_event_supported(evdev, EV_REP)) 635 return (EV_SKIP_EVENT); 636 break; 637 638 default: 639 return (EV_SKIP_EVENT); 640 } 641 break; 642 643 case EV_LED: 644 if (bit_test(evdev->ev_led_states, code) == value) 645 return (EV_SKIP_EVENT); 646 bit_change(evdev->ev_led_states, code, value); 647 break; 648 649 case EV_SND: 650 bit_change(evdev->ev_snd_states, code, value); 651 break; 652 653 case EV_SW: 654 if (bit_test(evdev->ev_sw_states, code) == value) 655 return (EV_SKIP_EVENT); 656 bit_change(evdev->ev_sw_states, code, value); 657 break; 658 659 case EV_REP: 660 if (evdev->ev_rep[code] == value) 661 return (EV_SKIP_EVENT); 662 evdev_set_repeat_params(evdev, code, value); 663 break; 664 665 case EV_REL: 666 if (value == 0) 667 return (EV_SKIP_EVENT); 668 break; 669 670 /* For EV_ABS, save last value in absinfo and ev_mt_states */ 671 case EV_ABS: 672 switch (code) { 673 case ABS_MT_SLOT: 674 /* Postpone ABS_MT_SLOT till next event */ 675 evdev_set_last_mt_slot(evdev, value); 676 return (EV_SKIP_EVENT); 677 678 case ABS_MT_FIRST ... ABS_MT_LAST: 679 /* Pass MT protocol type A events as is */ 680 if (!bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 681 break; 682 /* Don`t repeat MT protocol type B events */ 683 last_mt_slot = evdev_get_last_mt_slot(evdev); 684 if (evdev_get_mt_value(evdev, last_mt_slot, code) 685 == value) 686 return (EV_SKIP_EVENT); 687 evdev_set_mt_value(evdev, last_mt_slot, code, value); 688 if (last_mt_slot != CURRENT_MT_SLOT(evdev)) { 689 CURRENT_MT_SLOT(evdev) = last_mt_slot; 690 evdev->ev_report_opened = true; 691 return (EV_REPORT_MT_SLOT); 692 } 693 break; 694 695 default: 696 if (evdev->ev_absinfo[code].value == value) 697 return (EV_SKIP_EVENT); 698 evdev->ev_absinfo[code].value = value; 699 } 700 break; 701 702 case EV_SYN: 703 if (code == SYN_REPORT) { 704 /* Count empty reports as well as non empty */ 705 evdev->ev_report_count++; 706 /* Skip empty reports */ 707 if (!evdev->ev_report_opened) 708 return (EV_SKIP_EVENT); 709 evdev->ev_report_opened = false; 710 return (EV_REPORT_EVENT); 711 } 712 break; 713 } 714 715 evdev->ev_report_opened = true; 716 return (EV_REPORT_EVENT); 717 } 718 719 static void 720 evdev_propagate_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 721 int32_t value) 722 { 723 struct evdev_client *client; 724 725 debugf(evdev, "%s pushed event %d/%d/%d", 726 evdev->ev_shortname, type, code, value); 727 728 EVDEV_LOCK_ASSERT(evdev); 729 730 /* Propagate event through all clients */ 731 LIST_FOREACH(client, &evdev->ev_clients, ec_link) { 732 if (evdev->ev_grabber != NULL && evdev->ev_grabber != client) 733 continue; 734 735 EVDEV_CLIENT_LOCKQ(client); 736 evdev_client_push(client, type, code, value); 737 if (type == EV_SYN && code == SYN_REPORT) 738 evdev_notify_event(client); 739 EVDEV_CLIENT_UNLOCKQ(client); 740 } 741 742 evdev->ev_event_count++; 743 } 744 745 void 746 evdev_send_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 747 int32_t value) 748 { 749 enum evdev_sparse_result sparse; 750 751 EVDEV_LOCK_ASSERT(evdev); 752 753 sparse = evdev_sparse_event(evdev, type, code, value); 754 switch (sparse) { 755 case EV_REPORT_MT_SLOT: 756 /* report postponed ABS_MT_SLOT */ 757 evdev_propagate_event(evdev, EV_ABS, ABS_MT_SLOT, 758 CURRENT_MT_SLOT(evdev)); 759 /* FALLTHROUGH */ 760 case EV_REPORT_EVENT: 761 evdev_propagate_event(evdev, type, code, value); 762 /* FALLTHROUGH */ 763 case EV_SKIP_EVENT: 764 break; 765 } 766 } 767 768 void 769 evdev_restore_after_kdb(struct evdev_dev *evdev) 770 { 771 int code; 772 773 EVDEV_LOCK_ASSERT(evdev); 774 775 /* Report postponed leds */ 776 for (code = 0; code < LED_CNT; code++) 777 if (bit_test(evdev->ev_kdb_led_states, code)) 778 evdev_send_event(evdev, EV_LED, code, 779 !bit_test(evdev->ev_led_states, code)); 780 bit_nclear(evdev->ev_kdb_led_states, 0, LED_MAX); 781 782 /* Release stuck keys (CTRL + ALT + ESC) */ 783 evdev_stop_repeat(evdev); 784 for (code = 0; code < KEY_CNT; code++) { 785 if (bit_test(evdev->ev_key_states, code)) { 786 evdev_send_event(evdev, EV_KEY, code, KEY_EVENT_UP); 787 evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1); 788 } 789 } 790 } 791 792 int 793 evdev_push_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 794 int32_t value) 795 { 796 797 if (evdev_check_event(evdev, type, code, value) != 0) 798 return (EINVAL); 799 800 /* 801 * Discard all but LEDs kdb events as unrelated to userspace. 802 * Aggregate LED updates and postpone reporting until kdb deactivation. 803 */ 804 if (kdb_active || SCHEDULER_STOPPED()) { 805 evdev->ev_kdb_active = true; 806 if (type == EV_LED) 807 bit_set(evdev->ev_kdb_led_states, 808 bit_test(evdev->ev_led_states, code) != value); 809 return (0); 810 } 811 812 EVDEV_ENTER(evdev); 813 814 /* Fix evdev state corrupted with discarding of kdb events */ 815 if (evdev->ev_kdb_active) { 816 evdev->ev_kdb_active = false; 817 evdev_restore_after_kdb(evdev); 818 } 819 820 evdev_modify_event(evdev, type, code, &value); 821 if (type == EV_SYN && code == SYN_REPORT && 822 bit_test(evdev->ev_flags, EVDEV_FLAG_MT_AUTOREL)) 823 evdev_send_mt_autorel(evdev); 824 if (type == EV_SYN && code == SYN_REPORT && evdev->ev_report_opened && 825 bit_test(evdev->ev_flags, EVDEV_FLAG_MT_STCOMPAT)) 826 evdev_send_mt_compat(evdev); 827 evdev_send_event(evdev, type, code, value); 828 829 EVDEV_EXIT(evdev); 830 831 return (0); 832 } 833 834 int 835 evdev_inject_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 836 int32_t value) 837 { 838 int ret = 0; 839 840 switch (type) { 841 case EV_REP: 842 /* evdev repeats should not be processed by hardware driver */ 843 if (bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) 844 goto push; 845 /* FALLTHROUGH */ 846 case EV_LED: 847 case EV_MSC: 848 case EV_SND: 849 case EV_FF: 850 if (evdev->ev_methods != NULL && 851 evdev->ev_methods->ev_event != NULL) 852 evdev->ev_methods->ev_event(evdev, type, code, value); 853 /* 854 * Leds and driver repeats should be reported in ev_event 855 * method body to interoperate with kbdmux states and rates 856 * propagation so both ways (ioctl and evdev) of changing it 857 * will produce only one evdev event report to client. 858 */ 859 if (type == EV_LED || type == EV_REP) 860 break; 861 /* FALLTHROUGH */ 862 case EV_SYN: 863 case EV_KEY: 864 case EV_REL: 865 case EV_ABS: 866 case EV_SW: 867 push: 868 if (evdev->ev_lock_type != EV_LOCK_INTERNAL) 869 EVDEV_LOCK(evdev); 870 ret = evdev_push_event(evdev, type, code, value); 871 if (evdev->ev_lock_type != EV_LOCK_INTERNAL) 872 EVDEV_UNLOCK(evdev); 873 break; 874 875 default: 876 ret = EINVAL; 877 } 878 879 return (ret); 880 } 881 882 int 883 evdev_register_client(struct evdev_dev *evdev, struct evdev_client *client) 884 { 885 int ret = 0; 886 887 debugf(evdev, "adding new client for device %s", evdev->ev_shortname); 888 889 EVDEV_LOCK_ASSERT(evdev); 890 891 if (LIST_EMPTY(&evdev->ev_clients) && evdev->ev_methods != NULL && 892 evdev->ev_methods->ev_open != NULL) { 893 debugf(evdev, "calling ev_open() on device %s", 894 evdev->ev_shortname); 895 ret = evdev->ev_methods->ev_open(evdev); 896 } 897 if (ret == 0) 898 LIST_INSERT_HEAD(&evdev->ev_clients, client, ec_link); 899 return (ret); 900 } 901 902 void 903 evdev_dispose_client(struct evdev_dev *evdev, struct evdev_client *client) 904 { 905 debugf(evdev, "removing client for device %s", evdev->ev_shortname); 906 907 EVDEV_LOCK_ASSERT(evdev); 908 909 LIST_REMOVE(client, ec_link); 910 if (LIST_EMPTY(&evdev->ev_clients)) { 911 if (evdev->ev_methods != NULL && 912 evdev->ev_methods->ev_close != NULL) 913 (void)evdev->ev_methods->ev_close(evdev); 914 if (evdev_event_supported(evdev, EV_REP) && 915 bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) 916 evdev_stop_repeat(evdev); 917 } 918 evdev_release_client(evdev, client); 919 } 920 921 int 922 evdev_grab_client(struct evdev_dev *evdev, struct evdev_client *client) 923 { 924 925 EVDEV_LOCK_ASSERT(evdev); 926 927 if (evdev->ev_grabber != NULL) 928 return (EBUSY); 929 930 evdev->ev_grabber = client; 931 932 return (0); 933 } 934 935 int 936 evdev_release_client(struct evdev_dev *evdev, struct evdev_client *client) 937 { 938 939 EVDEV_LOCK_ASSERT(evdev); 940 941 if (evdev->ev_grabber != client) 942 return (EINVAL); 943 944 evdev->ev_grabber = NULL; 945 946 return (0); 947 } 948 949 static void 950 evdev_repeat_callout(void *arg) 951 { 952 struct evdev_dev *evdev = (struct evdev_dev *)arg; 953 954 evdev_send_event(evdev, EV_KEY, evdev->ev_rep_key, KEY_EVENT_REPEAT); 955 evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1); 956 957 if (evdev->ev_rep[REP_PERIOD]) 958 callout_reset(&evdev->ev_rep_callout, 959 evdev->ev_rep[REP_PERIOD] * hz / 1000, 960 evdev_repeat_callout, evdev); 961 else 962 evdev->ev_rep_key = KEY_RESERVED; 963 } 964 965 static void 966 evdev_start_repeat(struct evdev_dev *evdev, uint16_t key) 967 { 968 969 EVDEV_LOCK_ASSERT(evdev); 970 971 if (evdev->ev_rep[REP_DELAY]) { 972 evdev->ev_rep_key = key; 973 callout_reset(&evdev->ev_rep_callout, 974 evdev->ev_rep[REP_DELAY] * hz / 1000, 975 evdev_repeat_callout, evdev); 976 } 977 } 978 979 static void 980 evdev_stop_repeat(struct evdev_dev *evdev) 981 { 982 983 EVDEV_LOCK_ASSERT(evdev); 984 985 if (evdev->ev_rep_key != KEY_RESERVED) { 986 callout_stop(&evdev->ev_rep_callout); 987 evdev->ev_rep_key = KEY_RESERVED; 988 } 989 } 990 991 MODULE_VERSION(evdev, 1); 992