1 /*- 2 * Copyright (c) 2014 Jakub Wojciech Klama <[email protected]> 3 * Copyright (c) 2015-2016 Vladimir Kondratyev <[email protected]> 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 /* adb keyboard driver used on powerpc does not support evdev yet */ 70 #if defined(__powerpc__) && !defined(__powerpc64__) 71 int evdev_rcpt_mask = EVDEV_RCPT_KBDMUX | EVDEV_RCPT_HW_MOUSE; 72 #else 73 int evdev_rcpt_mask = EVDEV_RCPT_HW_MOUSE | EVDEV_RCPT_HW_KBD; 74 #endif 75 int evdev_sysmouse_t_axis = 0; 76 77 SYSCTL_NODE(_kern, OID_AUTO, evdev, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 78 "Evdev args"); 79 #ifdef EVDEV_SUPPORT 80 SYSCTL_INT(_kern_evdev, OID_AUTO, rcpt_mask, CTLFLAG_RWTUN, &evdev_rcpt_mask, 0, 81 "Who is receiving events: bit0 - sysmouse, bit1 - kbdmux, " 82 "bit2 - mouse hardware, bit3 - keyboard hardware"); 83 SYSCTL_INT(_kern_evdev, OID_AUTO, sysmouse_t_axis, CTLFLAG_RWTUN, 84 &evdev_sysmouse_t_axis, 0, "Extract T-axis from 0-none, 1-ums, 2-psm"); 85 #endif 86 SYSCTL_NODE(_kern_evdev, OID_AUTO, input, CTLFLAG_RD | CTLFLAG_MPSAFE, 0, 87 "Evdev input devices"); 88 89 static void evdev_start_repeat(struct evdev_dev *, uint16_t); 90 static void evdev_stop_repeat(struct evdev_dev *); 91 static int evdev_check_event(struct evdev_dev *, uint16_t, uint16_t, int32_t); 92 93 static inline void 94 bit_change(bitstr_t *bitstr, int bit, int value) 95 { 96 if (value) 97 bit_set(bitstr, bit); 98 else 99 bit_clear(bitstr, bit); 100 } 101 102 struct evdev_dev * 103 evdev_alloc(void) 104 { 105 106 return malloc(sizeof(struct evdev_dev), M_EVDEV, M_WAITOK | M_ZERO); 107 } 108 109 void 110 evdev_free(struct evdev_dev *evdev) 111 { 112 113 if (evdev != NULL && evdev->ev_cdev != NULL && 114 evdev->ev_cdev->si_drv1 != NULL) 115 evdev_unregister(evdev); 116 117 free(evdev, M_EVDEV); 118 } 119 120 static struct input_absinfo * 121 evdev_alloc_absinfo(void) 122 { 123 124 return (malloc(sizeof(struct input_absinfo) * ABS_CNT, M_EVDEV, 125 M_WAITOK | M_ZERO)); 126 } 127 128 static void 129 evdev_free_absinfo(struct input_absinfo *absinfo) 130 { 131 132 free(absinfo, M_EVDEV); 133 } 134 135 int 136 evdev_set_report_size(struct evdev_dev *evdev, size_t report_size) 137 { 138 if (report_size > KEY_CNT + REL_CNT + ABS_CNT + MAX_MT_SLOTS * MT_CNT + 139 MSC_CNT + LED_CNT + SND_CNT + SW_CNT + FF_CNT) 140 return (EINVAL); 141 142 evdev->ev_report_size = report_size; 143 return (0); 144 } 145 146 static size_t 147 evdev_estimate_report_size(struct evdev_dev *evdev) 148 { 149 size_t size = 0; 150 int res; 151 152 /* 153 * Keyboards generate one event per report but other devices with 154 * buttons like mouses can report events simultaneously 155 */ 156 bit_ffs_at(evdev->ev_key_flags, KEY_OK, KEY_CNT - KEY_OK, &res); 157 if (res == -1) 158 bit_ffs(evdev->ev_key_flags, BTN_MISC, &res); 159 size += (res != -1); 160 bit_count(evdev->ev_key_flags, BTN_MISC, KEY_OK - BTN_MISC, &res); 161 size += res; 162 163 /* All relative axes can be reported simultaneously */ 164 bit_count(evdev->ev_rel_flags, 0, REL_CNT, &res); 165 size += res; 166 167 /* 168 * All absolute axes can be reported simultaneously. 169 * Multitouch axes can be reported ABS_MT_SLOT times 170 */ 171 if (evdev->ev_absinfo != NULL) { 172 bit_count(evdev->ev_abs_flags, 0, ABS_CNT, &res); 173 size += res; 174 bit_count(evdev->ev_abs_flags, ABS_MT_FIRST, MT_CNT, &res); 175 if (res > 0) { 176 res++; /* ABS_MT_SLOT or SYN_MT_REPORT */ 177 if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 178 /* MT type B */ 179 size += res * MAXIMAL_MT_SLOT(evdev); 180 else 181 /* MT type A */ 182 size += res * (MAX_MT_REPORTS - 1); 183 } 184 } 185 186 /* All misc events can be reported simultaneously */ 187 bit_count(evdev->ev_msc_flags, 0, MSC_CNT, &res); 188 size += res; 189 190 /* All leds can be reported simultaneously */ 191 bit_count(evdev->ev_led_flags, 0, LED_CNT, &res); 192 size += res; 193 194 /* Assume other events are generated once per report */ 195 bit_ffs(evdev->ev_snd_flags, SND_CNT, &res); 196 size += (res != -1); 197 198 bit_ffs(evdev->ev_sw_flags, SW_CNT, &res); 199 size += (res != -1); 200 201 /* XXX: FF part is not implemented yet */ 202 203 size++; /* SYN_REPORT */ 204 return (size); 205 } 206 207 static void 208 evdev_sysctl_create(struct evdev_dev *evdev) 209 { 210 struct sysctl_oid *ev_sysctl_tree; 211 char ev_unit_str[8]; 212 213 snprintf(ev_unit_str, sizeof(ev_unit_str), "%d", evdev->ev_unit); 214 sysctl_ctx_init(&evdev->ev_sysctl_ctx); 215 216 ev_sysctl_tree = SYSCTL_ADD_NODE_WITH_LABEL(&evdev->ev_sysctl_ctx, 217 SYSCTL_STATIC_CHILDREN(_kern_evdev_input), OID_AUTO, 218 ev_unit_str, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "", 219 "device index"); 220 221 SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx, 222 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "name", CTLFLAG_RD, 223 evdev->ev_name, 0, 224 "Input device name"); 225 226 SYSCTL_ADD_STRUCT(&evdev->ev_sysctl_ctx, 227 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "id", CTLFLAG_RD, 228 &evdev->ev_id, input_id, 229 "Input device identification"); 230 231 /* ioctl returns ENOENT if phys is not set. sysctl returns "" here */ 232 SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx, 233 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "phys", CTLFLAG_RD, 234 evdev->ev_shortname, 0, 235 "Input device short name"); 236 237 /* ioctl returns ENOENT if uniq is not set. sysctl returns "" here */ 238 SYSCTL_ADD_STRING(&evdev->ev_sysctl_ctx, 239 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "uniq", CTLFLAG_RD, 240 evdev->ev_serial, 0, 241 "Input device unique number"); 242 243 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 244 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "props", CTLFLAG_RD, 245 evdev->ev_prop_flags, sizeof(evdev->ev_prop_flags), "", 246 "Input device properties"); 247 248 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 249 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "type_bits", CTLFLAG_RD, 250 evdev->ev_type_flags, sizeof(evdev->ev_type_flags), "", 251 "Input device supported events types"); 252 253 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 254 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "key_bits", CTLFLAG_RD, 255 evdev->ev_key_flags, sizeof(evdev->ev_key_flags), 256 "", "Input device supported keys"); 257 258 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 259 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "rel_bits", CTLFLAG_RD, 260 evdev->ev_rel_flags, sizeof(evdev->ev_rel_flags), "", 261 "Input device supported relative events"); 262 263 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 264 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "abs_bits", CTLFLAG_RD, 265 evdev->ev_abs_flags, sizeof(evdev->ev_abs_flags), "", 266 "Input device supported absolute events"); 267 268 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 269 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "msc_bits", CTLFLAG_RD, 270 evdev->ev_msc_flags, sizeof(evdev->ev_msc_flags), "", 271 "Input device supported miscellaneous events"); 272 273 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 274 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "led_bits", CTLFLAG_RD, 275 evdev->ev_led_flags, sizeof(evdev->ev_led_flags), "", 276 "Input device supported LED events"); 277 278 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 279 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "snd_bits", CTLFLAG_RD, 280 evdev->ev_snd_flags, sizeof(evdev->ev_snd_flags), "", 281 "Input device supported sound events"); 282 283 SYSCTL_ADD_OPAQUE(&evdev->ev_sysctl_ctx, 284 SYSCTL_CHILDREN(ev_sysctl_tree), OID_AUTO, "sw_bits", CTLFLAG_RD, 285 evdev->ev_sw_flags, sizeof(evdev->ev_sw_flags), "", 286 "Input device supported switch events"); 287 } 288 289 static int 290 evdev_register_common(struct evdev_dev *evdev) 291 { 292 int ret; 293 294 debugf(evdev, "%s: registered evdev provider: %s <%s>\n", 295 evdev->ev_shortname, evdev->ev_name, evdev->ev_serial); 296 297 /* Initialize internal structures */ 298 LIST_INIT(&evdev->ev_clients); 299 300 if (evdev_event_supported(evdev, EV_REP) && 301 bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) { 302 /* Initialize callout */ 303 callout_init_mtx(&evdev->ev_rep_callout, evdev->ev_lock, 0); 304 305 if (evdev->ev_rep[REP_DELAY] == 0 && 306 evdev->ev_rep[REP_PERIOD] == 0) { 307 /* Supply default values */ 308 evdev->ev_rep[REP_DELAY] = 250; 309 evdev->ev_rep[REP_PERIOD] = 33; 310 } 311 } 312 313 /* Initialize multitouch protocol type B states */ 314 if (bit_test(evdev->ev_abs_flags, ABS_MT_SLOT) && 315 evdev->ev_absinfo != NULL && MAXIMAL_MT_SLOT(evdev) > 0) 316 evdev_mt_init(evdev); 317 318 /* Estimate maximum report size */ 319 if (evdev->ev_report_size == 0) { 320 ret = evdev_set_report_size(evdev, 321 evdev_estimate_report_size(evdev)); 322 if (ret != 0) 323 goto bail_out; 324 } 325 326 /* Create char device node */ 327 ret = evdev_cdev_create(evdev); 328 if (ret != 0) 329 goto bail_out; 330 331 /* Create sysctls (for device enumeration without /dev/input access rights) */ 332 evdev_sysctl_create(evdev); 333 334 bail_out: 335 return (ret); 336 } 337 338 int 339 evdev_register(struct evdev_dev *evdev) 340 { 341 int ret; 342 343 evdev->ev_lock_type = EV_LOCK_INTERNAL; 344 evdev->ev_lock = &evdev->ev_mtx; 345 mtx_init(&evdev->ev_mtx, "evmtx", NULL, MTX_DEF); 346 347 ret = evdev_register_common(evdev); 348 if (ret != 0) 349 mtx_destroy(&evdev->ev_mtx); 350 351 return (ret); 352 } 353 354 int 355 evdev_register_mtx(struct evdev_dev *evdev, struct mtx *mtx) 356 { 357 358 evdev->ev_lock_type = EV_LOCK_MTX; 359 evdev->ev_lock = mtx; 360 return (evdev_register_common(evdev)); 361 } 362 363 int 364 evdev_unregister(struct evdev_dev *evdev) 365 { 366 struct evdev_client *client, *tmp; 367 int ret; 368 debugf(evdev, "%s: unregistered evdev provider: %s\n", 369 evdev->ev_shortname, evdev->ev_name); 370 371 sysctl_ctx_free(&evdev->ev_sysctl_ctx); 372 373 EVDEV_LOCK(evdev); 374 evdev->ev_cdev->si_drv1 = NULL; 375 /* Wake up sleepers */ 376 LIST_FOREACH_SAFE(client, &evdev->ev_clients, ec_link, tmp) { 377 evdev_revoke_client(client); 378 evdev_dispose_client(evdev, client); 379 EVDEV_CLIENT_LOCKQ(client); 380 evdev_notify_event(client); 381 EVDEV_CLIENT_UNLOCKQ(client); 382 } 383 EVDEV_UNLOCK(evdev); 384 385 /* destroy_dev can sleep so release lock */ 386 ret = evdev_cdev_destroy(evdev); 387 evdev->ev_cdev = NULL; 388 if (ret == 0 && evdev->ev_lock_type == EV_LOCK_INTERNAL) 389 mtx_destroy(&evdev->ev_mtx); 390 391 evdev_free_absinfo(evdev->ev_absinfo); 392 evdev_mt_free(evdev); 393 394 return (ret); 395 } 396 397 inline void 398 evdev_set_name(struct evdev_dev *evdev, const char *name) 399 { 400 401 snprintf(evdev->ev_name, NAMELEN, "%s", name); 402 } 403 404 inline void 405 evdev_set_id(struct evdev_dev *evdev, uint16_t bustype, uint16_t vendor, 406 uint16_t product, uint16_t version) 407 { 408 409 evdev->ev_id = (struct input_id) { 410 .bustype = bustype, 411 .vendor = vendor, 412 .product = product, 413 .version = version 414 }; 415 } 416 417 inline void 418 evdev_set_phys(struct evdev_dev *evdev, const char *name) 419 { 420 421 snprintf(evdev->ev_shortname, NAMELEN, "%s", name); 422 } 423 424 inline void 425 evdev_set_serial(struct evdev_dev *evdev, const char *serial) 426 { 427 428 snprintf(evdev->ev_serial, NAMELEN, "%s", serial); 429 } 430 431 inline void 432 evdev_set_methods(struct evdev_dev *evdev, void *softc, 433 const struct evdev_methods *methods) 434 { 435 436 evdev->ev_methods = methods; 437 evdev->ev_softc = softc; 438 } 439 440 inline void * 441 evdev_get_softc(struct evdev_dev *evdev) 442 { 443 444 return (evdev->ev_softc); 445 } 446 447 inline void 448 evdev_support_prop(struct evdev_dev *evdev, uint16_t prop) 449 { 450 451 KASSERT(prop < INPUT_PROP_CNT, ("invalid evdev input property")); 452 bit_set(evdev->ev_prop_flags, prop); 453 } 454 455 inline void 456 evdev_support_event(struct evdev_dev *evdev, uint16_t type) 457 { 458 459 KASSERT(type < EV_CNT, ("invalid evdev event property")); 460 bit_set(evdev->ev_type_flags, type); 461 } 462 463 inline void 464 evdev_support_key(struct evdev_dev *evdev, uint16_t code) 465 { 466 467 KASSERT(code < KEY_CNT, ("invalid evdev key property")); 468 bit_set(evdev->ev_key_flags, code); 469 } 470 471 inline void 472 evdev_support_rel(struct evdev_dev *evdev, uint16_t code) 473 { 474 475 KASSERT(code < REL_CNT, ("invalid evdev rel property")); 476 bit_set(evdev->ev_rel_flags, code); 477 } 478 479 inline void 480 evdev_support_abs(struct evdev_dev *evdev, uint16_t code, int32_t minimum, 481 int32_t maximum, int32_t fuzz, int32_t flat, int32_t resolution) 482 { 483 struct input_absinfo absinfo; 484 485 KASSERT(code < ABS_CNT, ("invalid evdev abs property")); 486 487 absinfo = (struct input_absinfo) { 488 .value = 0, 489 .minimum = minimum, 490 .maximum = maximum, 491 .fuzz = fuzz, 492 .flat = flat, 493 .resolution = resolution, 494 }; 495 evdev_set_abs_bit(evdev, code); 496 evdev_set_absinfo(evdev, code, &absinfo); 497 } 498 499 inline void 500 evdev_set_abs_bit(struct evdev_dev *evdev, uint16_t code) 501 { 502 503 KASSERT(code < ABS_CNT, ("invalid evdev abs property")); 504 if (evdev->ev_absinfo == NULL) 505 evdev->ev_absinfo = evdev_alloc_absinfo(); 506 bit_set(evdev->ev_abs_flags, code); 507 } 508 509 inline void 510 evdev_support_msc(struct evdev_dev *evdev, uint16_t code) 511 { 512 513 KASSERT(code < MSC_CNT, ("invalid evdev msc property")); 514 bit_set(evdev->ev_msc_flags, code); 515 } 516 517 518 inline void 519 evdev_support_led(struct evdev_dev *evdev, uint16_t code) 520 { 521 522 KASSERT(code < LED_CNT, ("invalid evdev led property")); 523 bit_set(evdev->ev_led_flags, code); 524 } 525 526 inline void 527 evdev_support_snd(struct evdev_dev *evdev, uint16_t code) 528 { 529 530 KASSERT(code < SND_CNT, ("invalid evdev snd property")); 531 bit_set(evdev->ev_snd_flags, code); 532 } 533 534 inline void 535 evdev_support_sw(struct evdev_dev *evdev, uint16_t code) 536 { 537 538 KASSERT(code < SW_CNT, ("invalid evdev sw property")); 539 bit_set(evdev->ev_sw_flags, code); 540 } 541 542 bool 543 evdev_event_supported(struct evdev_dev *evdev, uint16_t type) 544 { 545 546 KASSERT(type < EV_CNT, ("invalid evdev event property")); 547 return (bit_test(evdev->ev_type_flags, type)); 548 } 549 550 inline void 551 evdev_set_absinfo(struct evdev_dev *evdev, uint16_t axis, 552 struct input_absinfo *absinfo) 553 { 554 555 KASSERT(axis < ABS_CNT, ("invalid evdev abs property")); 556 557 if (axis == ABS_MT_SLOT && 558 (absinfo->maximum < 1 || absinfo->maximum >= MAX_MT_SLOTS)) 559 return; 560 561 if (evdev->ev_absinfo == NULL) 562 evdev->ev_absinfo = evdev_alloc_absinfo(); 563 564 if (axis == ABS_MT_SLOT) 565 evdev->ev_absinfo[ABS_MT_SLOT].maximum = absinfo->maximum; 566 else 567 memcpy(&evdev->ev_absinfo[axis], absinfo, 568 sizeof(struct input_absinfo)); 569 } 570 571 inline void 572 evdev_set_repeat_params(struct evdev_dev *evdev, uint16_t property, int value) 573 { 574 575 KASSERT(property < REP_CNT, ("invalid evdev repeat property")); 576 evdev->ev_rep[property] = value; 577 } 578 579 inline void 580 evdev_set_flag(struct evdev_dev *evdev, uint16_t flag) 581 { 582 583 KASSERT(flag < EVDEV_FLAG_CNT, ("invalid evdev flag property")); 584 bit_set(evdev->ev_flags, flag); 585 } 586 587 static int 588 evdev_check_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 589 int32_t value) 590 { 591 592 if (type >= EV_CNT) 593 return (EINVAL); 594 595 /* Allow SYN events implicitly */ 596 if (type != EV_SYN && !evdev_event_supported(evdev, type)) 597 return (EINVAL); 598 599 switch (type) { 600 case EV_SYN: 601 if (code >= SYN_CNT) 602 return (EINVAL); 603 break; 604 605 case EV_KEY: 606 if (code >= KEY_CNT) 607 return (EINVAL); 608 if (!bit_test(evdev->ev_key_flags, code)) 609 return (EINVAL); 610 break; 611 612 case EV_REL: 613 if (code >= REL_CNT) 614 return (EINVAL); 615 if (!bit_test(evdev->ev_rel_flags, code)) 616 return (EINVAL); 617 break; 618 619 case EV_ABS: 620 if (code >= ABS_CNT) 621 return (EINVAL); 622 if (!bit_test(evdev->ev_abs_flags, code)) 623 return (EINVAL); 624 if (code == ABS_MT_SLOT && 625 (value < 0 || value > MAXIMAL_MT_SLOT(evdev))) 626 return (EINVAL); 627 if (ABS_IS_MT(code) && evdev->ev_mt == NULL && 628 bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 629 return (EINVAL); 630 break; 631 632 case EV_MSC: 633 if (code >= MSC_CNT) 634 return (EINVAL); 635 if (!bit_test(evdev->ev_msc_flags, code)) 636 return (EINVAL); 637 break; 638 639 case EV_LED: 640 if (code >= LED_CNT) 641 return (EINVAL); 642 if (!bit_test(evdev->ev_led_flags, code)) 643 return (EINVAL); 644 break; 645 646 case EV_SND: 647 if (code >= SND_CNT) 648 return (EINVAL); 649 if (!bit_test(evdev->ev_snd_flags, code)) 650 return (EINVAL); 651 break; 652 653 case EV_SW: 654 if (code >= SW_CNT) 655 return (EINVAL); 656 if (!bit_test(evdev->ev_sw_flags, code)) 657 return (EINVAL); 658 break; 659 660 case EV_REP: 661 if (code >= REP_CNT) 662 return (EINVAL); 663 break; 664 665 default: 666 return (EINVAL); 667 } 668 669 return (0); 670 } 671 672 static void 673 evdev_modify_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 674 int32_t *value) 675 { 676 677 EVDEV_LOCK_ASSERT(evdev); 678 679 switch (type) { 680 case EV_KEY: 681 if (!evdev_event_supported(evdev, EV_REP)) 682 break; 683 684 if (!bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) { 685 /* Detect driver key repeats. */ 686 if (bit_test(evdev->ev_key_states, code) && 687 *value == KEY_EVENT_DOWN) 688 *value = KEY_EVENT_REPEAT; 689 } else { 690 /* Start/stop callout for evdev repeats */ 691 if (bit_test(evdev->ev_key_states, code) == !*value && 692 !LIST_EMPTY(&evdev->ev_clients)) { 693 if (*value == KEY_EVENT_DOWN) 694 evdev_start_repeat(evdev, code); 695 else 696 evdev_stop_repeat(evdev); 697 } 698 } 699 break; 700 701 case EV_ABS: 702 /* TBD: implement fuzz */ 703 break; 704 } 705 } 706 707 static enum evdev_sparse_result 708 evdev_sparse_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 709 int32_t value) 710 { 711 int32_t last_mt_slot; 712 713 EVDEV_LOCK_ASSERT(evdev); 714 715 /* 716 * For certain event types, update device state bits 717 * and convert level reporting to edge reporting 718 */ 719 switch (type) { 720 case EV_KEY: 721 switch (value) { 722 case KEY_EVENT_UP: 723 case KEY_EVENT_DOWN: 724 if (bit_test(evdev->ev_key_states, code) == value) 725 return (EV_SKIP_EVENT); 726 bit_change(evdev->ev_key_states, code, value); 727 break; 728 729 case KEY_EVENT_REPEAT: 730 if (bit_test(evdev->ev_key_states, code) == 0 || 731 !evdev_event_supported(evdev, EV_REP)) 732 return (EV_SKIP_EVENT); 733 break; 734 735 default: 736 return (EV_SKIP_EVENT); 737 } 738 break; 739 740 case EV_LED: 741 if (bit_test(evdev->ev_led_states, code) == value) 742 return (EV_SKIP_EVENT); 743 bit_change(evdev->ev_led_states, code, value); 744 break; 745 746 case EV_SND: 747 bit_change(evdev->ev_snd_states, code, value); 748 break; 749 750 case EV_SW: 751 if (bit_test(evdev->ev_sw_states, code) == value) 752 return (EV_SKIP_EVENT); 753 bit_change(evdev->ev_sw_states, code, value); 754 break; 755 756 case EV_REP: 757 if (evdev->ev_rep[code] == value) 758 return (EV_SKIP_EVENT); 759 evdev_set_repeat_params(evdev, code, value); 760 break; 761 762 case EV_REL: 763 if (value == 0) 764 return (EV_SKIP_EVENT); 765 break; 766 767 /* For EV_ABS, save last value in absinfo and ev_mt_states */ 768 case EV_ABS: 769 switch (code) { 770 case ABS_MT_SLOT: 771 /* Postpone ABS_MT_SLOT till next event */ 772 evdev_set_last_mt_slot(evdev, value); 773 return (EV_SKIP_EVENT); 774 775 case ABS_MT_FIRST ... ABS_MT_LAST: 776 /* Pass MT protocol type A events as is */ 777 if (!bit_test(evdev->ev_abs_flags, ABS_MT_SLOT)) 778 break; 779 /* Don`t repeat MT protocol type B events */ 780 last_mt_slot = evdev_get_last_mt_slot(evdev); 781 if (evdev_get_mt_value(evdev, last_mt_slot, code) 782 == value) 783 return (EV_SKIP_EVENT); 784 evdev_set_mt_value(evdev, last_mt_slot, code, value); 785 if (last_mt_slot != CURRENT_MT_SLOT(evdev)) { 786 CURRENT_MT_SLOT(evdev) = last_mt_slot; 787 evdev->ev_report_opened = true; 788 return (EV_REPORT_MT_SLOT); 789 } 790 break; 791 792 default: 793 if (evdev->ev_absinfo[code].value == value) 794 return (EV_SKIP_EVENT); 795 evdev->ev_absinfo[code].value = value; 796 } 797 break; 798 799 case EV_SYN: 800 if (code == SYN_REPORT) { 801 /* Count empty reports as well as non empty */ 802 evdev->ev_report_count++; 803 /* Skip empty reports */ 804 if (!evdev->ev_report_opened) 805 return (EV_SKIP_EVENT); 806 evdev->ev_report_opened = false; 807 return (EV_REPORT_EVENT); 808 } 809 break; 810 } 811 812 evdev->ev_report_opened = true; 813 return (EV_REPORT_EVENT); 814 } 815 816 static void 817 evdev_propagate_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 818 int32_t value) 819 { 820 struct evdev_client *client; 821 822 debugf(evdev, "%s pushed event %d/%d/%d", 823 evdev->ev_shortname, type, code, value); 824 825 EVDEV_LOCK_ASSERT(evdev); 826 827 /* Propagate event through all clients */ 828 LIST_FOREACH(client, &evdev->ev_clients, ec_link) { 829 if (evdev->ev_grabber != NULL && evdev->ev_grabber != client) 830 continue; 831 832 EVDEV_CLIENT_LOCKQ(client); 833 evdev_client_push(client, type, code, value); 834 if (type == EV_SYN && code == SYN_REPORT) 835 evdev_notify_event(client); 836 EVDEV_CLIENT_UNLOCKQ(client); 837 } 838 839 evdev->ev_event_count++; 840 } 841 842 void 843 evdev_send_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 844 int32_t value) 845 { 846 enum evdev_sparse_result sparse; 847 848 EVDEV_LOCK_ASSERT(evdev); 849 850 sparse = evdev_sparse_event(evdev, type, code, value); 851 switch (sparse) { 852 case EV_REPORT_MT_SLOT: 853 /* report postponed ABS_MT_SLOT */ 854 evdev_propagate_event(evdev, EV_ABS, ABS_MT_SLOT, 855 CURRENT_MT_SLOT(evdev)); 856 /* FALLTHROUGH */ 857 case EV_REPORT_EVENT: 858 evdev_propagate_event(evdev, type, code, value); 859 /* FALLTHROUGH */ 860 case EV_SKIP_EVENT: 861 break; 862 } 863 } 864 865 void 866 evdev_restore_after_kdb(struct evdev_dev *evdev) 867 { 868 int code; 869 870 EVDEV_LOCK_ASSERT(evdev); 871 872 /* Report postponed leds */ 873 for (code = 0; code < LED_CNT; code++) 874 if (bit_test(evdev->ev_kdb_led_states, code)) 875 evdev_send_event(evdev, EV_LED, code, 876 !bit_test(evdev->ev_led_states, code)); 877 bit_nclear(evdev->ev_kdb_led_states, 0, LED_MAX); 878 879 /* Release stuck keys (CTRL + ALT + ESC) */ 880 evdev_stop_repeat(evdev); 881 for (code = 0; code < KEY_CNT; code++) { 882 if (bit_test(evdev->ev_key_states, code)) { 883 evdev_send_event(evdev, EV_KEY, code, KEY_EVENT_UP); 884 evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1); 885 } 886 } 887 } 888 889 int 890 evdev_push_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 891 int32_t value) 892 { 893 894 if (evdev_check_event(evdev, type, code, value) != 0) 895 return (EINVAL); 896 897 /* 898 * Discard all but LEDs kdb events as unrelated to userspace. 899 * Aggregate LED updates and postpone reporting until kdb deactivation. 900 */ 901 if (kdb_active || SCHEDULER_STOPPED()) { 902 evdev->ev_kdb_active = true; 903 if (type == EV_LED) 904 bit_set(evdev->ev_kdb_led_states, 905 bit_test(evdev->ev_led_states, code) != value); 906 return (0); 907 } 908 909 EVDEV_ENTER(evdev); 910 911 /* Fix evdev state corrupted with discarding of kdb events */ 912 if (evdev->ev_kdb_active) { 913 evdev->ev_kdb_active = false; 914 evdev_restore_after_kdb(evdev); 915 } 916 917 evdev_modify_event(evdev, type, code, &value); 918 if (type == EV_SYN && code == SYN_REPORT && 919 bit_test(evdev->ev_flags, EVDEV_FLAG_MT_AUTOREL)) 920 evdev_send_mt_autorel(evdev); 921 if (type == EV_SYN && code == SYN_REPORT && evdev->ev_report_opened && 922 bit_test(evdev->ev_flags, EVDEV_FLAG_MT_STCOMPAT)) 923 evdev_send_mt_compat(evdev); 924 evdev_send_event(evdev, type, code, value); 925 926 EVDEV_EXIT(evdev); 927 928 return (0); 929 } 930 931 int 932 evdev_inject_event(struct evdev_dev *evdev, uint16_t type, uint16_t code, 933 int32_t value) 934 { 935 int ret = 0; 936 937 switch (type) { 938 case EV_REP: 939 /* evdev repeats should not be processed by hardware driver */ 940 if (bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) 941 goto push; 942 /* FALLTHROUGH */ 943 case EV_LED: 944 case EV_MSC: 945 case EV_SND: 946 case EV_FF: 947 if (evdev->ev_methods != NULL && 948 evdev->ev_methods->ev_event != NULL) 949 evdev->ev_methods->ev_event(evdev, type, code, value); 950 /* 951 * Leds and driver repeats should be reported in ev_event 952 * method body to interoperate with kbdmux states and rates 953 * propagation so both ways (ioctl and evdev) of changing it 954 * will produce only one evdev event report to client. 955 */ 956 if (type == EV_LED || type == EV_REP) 957 break; 958 /* FALLTHROUGH */ 959 case EV_SYN: 960 case EV_KEY: 961 case EV_REL: 962 case EV_ABS: 963 case EV_SW: 964 push: 965 if (evdev->ev_lock_type != EV_LOCK_INTERNAL) 966 EVDEV_LOCK(evdev); 967 ret = evdev_push_event(evdev, type, code, value); 968 if (evdev->ev_lock_type != EV_LOCK_INTERNAL) 969 EVDEV_UNLOCK(evdev); 970 break; 971 972 default: 973 ret = EINVAL; 974 } 975 976 return (ret); 977 } 978 979 int 980 evdev_register_client(struct evdev_dev *evdev, struct evdev_client *client) 981 { 982 int ret = 0; 983 984 debugf(evdev, "adding new client for device %s", evdev->ev_shortname); 985 986 EVDEV_LOCK_ASSERT(evdev); 987 988 if (LIST_EMPTY(&evdev->ev_clients) && evdev->ev_methods != NULL && 989 evdev->ev_methods->ev_open != NULL) { 990 debugf(evdev, "calling ev_open() on device %s", 991 evdev->ev_shortname); 992 ret = evdev->ev_methods->ev_open(evdev); 993 } 994 if (ret == 0) 995 LIST_INSERT_HEAD(&evdev->ev_clients, client, ec_link); 996 return (ret); 997 } 998 999 void 1000 evdev_dispose_client(struct evdev_dev *evdev, struct evdev_client *client) 1001 { 1002 debugf(evdev, "removing client for device %s", evdev->ev_shortname); 1003 1004 EVDEV_LOCK_ASSERT(evdev); 1005 1006 LIST_REMOVE(client, ec_link); 1007 if (LIST_EMPTY(&evdev->ev_clients)) { 1008 if (evdev->ev_methods != NULL && 1009 evdev->ev_methods->ev_close != NULL) 1010 (void)evdev->ev_methods->ev_close(evdev); 1011 if (evdev_event_supported(evdev, EV_REP) && 1012 bit_test(evdev->ev_flags, EVDEV_FLAG_SOFTREPEAT)) 1013 evdev_stop_repeat(evdev); 1014 } 1015 evdev_release_client(evdev, client); 1016 } 1017 1018 int 1019 evdev_grab_client(struct evdev_dev *evdev, struct evdev_client *client) 1020 { 1021 1022 EVDEV_LOCK_ASSERT(evdev); 1023 1024 if (evdev->ev_grabber != NULL) 1025 return (EBUSY); 1026 1027 evdev->ev_grabber = client; 1028 1029 return (0); 1030 } 1031 1032 int 1033 evdev_release_client(struct evdev_dev *evdev, struct evdev_client *client) 1034 { 1035 1036 EVDEV_LOCK_ASSERT(evdev); 1037 1038 if (evdev->ev_grabber != client) 1039 return (EINVAL); 1040 1041 evdev->ev_grabber = NULL; 1042 1043 return (0); 1044 } 1045 1046 static void 1047 evdev_repeat_callout(void *arg) 1048 { 1049 struct evdev_dev *evdev = (struct evdev_dev *)arg; 1050 1051 evdev_send_event(evdev, EV_KEY, evdev->ev_rep_key, KEY_EVENT_REPEAT); 1052 evdev_send_event(evdev, EV_SYN, SYN_REPORT, 1); 1053 1054 if (evdev->ev_rep[REP_PERIOD]) 1055 callout_reset(&evdev->ev_rep_callout, 1056 evdev->ev_rep[REP_PERIOD] * hz / 1000, 1057 evdev_repeat_callout, evdev); 1058 else 1059 evdev->ev_rep_key = KEY_RESERVED; 1060 } 1061 1062 static void 1063 evdev_start_repeat(struct evdev_dev *evdev, uint16_t key) 1064 { 1065 1066 EVDEV_LOCK_ASSERT(evdev); 1067 1068 if (evdev->ev_rep[REP_DELAY]) { 1069 evdev->ev_rep_key = key; 1070 callout_reset(&evdev->ev_rep_callout, 1071 evdev->ev_rep[REP_DELAY] * hz / 1000, 1072 evdev_repeat_callout, evdev); 1073 } 1074 } 1075 1076 static void 1077 evdev_stop_repeat(struct evdev_dev *evdev) 1078 { 1079 1080 EVDEV_LOCK_ASSERT(evdev); 1081 1082 if (evdev->ev_rep_key != KEY_RESERVED) { 1083 callout_stop(&evdev->ev_rep_callout); 1084 evdev->ev_rep_key = KEY_RESERVED; 1085 } 1086 } 1087 1088 MODULE_VERSION(evdev, 1); 1089