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