Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/kbd/kbd.c
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1 /*- 2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer as 10 * the first lines of this file unmodified. 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 AUTHORS ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD: releng/6.4/sys/dev/kbd/kbd.c 156268 2006-03-04 00:41:28Z emax $"); 30 31 #include "opt_kbd.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/conf.h> 38 #include <sys/fcntl.h> 39 #include <sys/tty.h> 40 #include <sys/poll.h> 41 #include <sys/proc.h> 42 #include <sys/sysctl.h> 43 #include <sys/uio.h> 44 45 #include <sys/kbio.h> 46 47 #include <dev/kbd/kbdreg.h> 48 49 #define KBD_INDEX(dev) minor(dev) 50 51 typedef struct genkbd_softc { 52 int gkb_flags; /* flag/status bits */ 53 #define KB_ASLEEP (1 << 0) 54 struct clist gkb_q; /* input queue */ 55 struct selinfo gkb_rsel; 56 } genkbd_softc_t; 57 58 static SLIST_HEAD(, keyboard_driver) keyboard_drivers = 59 SLIST_HEAD_INITIALIZER(keyboard_drivers); 60 61 SET_DECLARE(kbddriver_set, const keyboard_driver_t); 62 63 /* local arrays */ 64 65 /* 66 * We need at least one entry each in order to initialize a keyboard 67 * for the kernel console. The arrays will be increased dynamically 68 * when necessary. 69 */ 70 71 static int keyboards = 1; 72 static keyboard_t *kbd_ini; 73 static keyboard_t **keyboard = &kbd_ini; 74 static keyboard_switch_t *kbdsw_ini; 75 keyboard_switch_t **kbdsw = &kbdsw_ini; 76 77 static int keymap_restrict_change; 78 SYSCTL_NODE(_hw, OID_AUTO, kbd, CTLFLAG_RD, 0, "kbd"); 79 SYSCTL_INT(_hw_kbd, OID_AUTO, keymap_restrict_change, CTLFLAG_RW, 80 &keymap_restrict_change, 0, "restrict ability to change keymap"); 81 82 #define ARRAY_DELTA 4 83 84 static int 85 kbd_realloc_array(void) 86 { 87 keyboard_t **new_kbd; 88 keyboard_switch_t **new_kbdsw; 89 int newsize; 90 int s; 91 92 s = spltty(); 93 newsize = ((keyboards + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA; 94 new_kbd = malloc(sizeof(*new_kbd)*newsize, M_DEVBUF, M_NOWAIT|M_ZERO); 95 if (new_kbd == NULL) { 96 splx(s); 97 return (ENOMEM); 98 } 99 new_kbdsw = malloc(sizeof(*new_kbdsw)*newsize, M_DEVBUF, 100 M_NOWAIT|M_ZERO); 101 if (new_kbdsw == NULL) { 102 free(new_kbd, M_DEVBUF); 103 splx(s); 104 return (ENOMEM); 105 } 106 bcopy(keyboard, new_kbd, sizeof(*keyboard)*keyboards); 107 bcopy(kbdsw, new_kbdsw, sizeof(*kbdsw)*keyboards); 108 if (keyboards > 1) { 109 free(keyboard, M_DEVBUF); 110 free(kbdsw, M_DEVBUF); 111 } 112 keyboard = new_kbd; 113 kbdsw = new_kbdsw; 114 keyboards = newsize; 115 splx(s); 116 117 if (bootverbose) 118 printf("kbd: new array size %d\n", keyboards); 119 120 return (0); 121 } 122 123 /* 124 * Low-level keyboard driver functions 125 * Keyboard subdrivers, such as the AT keyboard driver and the USB keyboard 126 * driver, call these functions to initialize the keyboard_t structure 127 * and register it to the virtual keyboard driver `kbd'. 128 */ 129 130 /* initialize the keyboard_t structure */ 131 void 132 kbd_init_struct(keyboard_t *kbd, char *name, int type, int unit, int config, 133 int port, int port_size) 134 { 135 kbd->kb_flags = KB_NO_DEVICE; /* device has not been found */ 136 kbd->kb_name = name; 137 kbd->kb_type = type; 138 kbd->kb_unit = unit; 139 kbd->kb_config = config & ~KB_CONF_PROBE_ONLY; 140 kbd->kb_led = 0; /* unknown */ 141 kbd->kb_io_base = port; 142 kbd->kb_io_size = port_size; 143 kbd->kb_data = NULL; 144 kbd->kb_keymap = NULL; 145 kbd->kb_accentmap = NULL; 146 kbd->kb_fkeytab = NULL; 147 kbd->kb_fkeytab_size = 0; 148 kbd->kb_delay1 = KB_DELAY1; /* these values are advisory only */ 149 kbd->kb_delay2 = KB_DELAY2; 150 kbd->kb_count = 0L; 151 bzero(kbd->kb_lastact, sizeof(kbd->kb_lastact)); 152 } 153 154 void 155 kbd_set_maps(keyboard_t *kbd, keymap_t *keymap, accentmap_t *accmap, 156 fkeytab_t *fkeymap, int fkeymap_size) 157 { 158 kbd->kb_keymap = keymap; 159 kbd->kb_accentmap = accmap; 160 kbd->kb_fkeytab = fkeymap; 161 kbd->kb_fkeytab_size = fkeymap_size; 162 } 163 164 /* declare a new keyboard driver */ 165 int 166 kbd_add_driver(keyboard_driver_t *driver) 167 { 168 if (SLIST_NEXT(driver, link)) 169 return (EINVAL); 170 SLIST_INSERT_HEAD(&keyboard_drivers, driver, link); 171 return (0); 172 } 173 174 int 175 kbd_delete_driver(keyboard_driver_t *driver) 176 { 177 SLIST_REMOVE(&keyboard_drivers, driver, keyboard_driver, link); 178 SLIST_NEXT(driver, link) = NULL; 179 return (0); 180 } 181 182 /* register a keyboard and associate it with a function table */ 183 int 184 kbd_register(keyboard_t *kbd) 185 { 186 const keyboard_driver_t **list; 187 const keyboard_driver_t *p; 188 keyboard_t *mux; 189 keyboard_info_t ki; 190 int index; 191 192 mux = kbd_get_keyboard(kbd_find_keyboard("kbdmux", -1)); 193 194 for (index = 0; index < keyboards; ++index) { 195 if (keyboard[index] == NULL) 196 break; 197 } 198 if (index >= keyboards) { 199 if (kbd_realloc_array()) 200 return (-1); 201 } 202 203 kbd->kb_index = index; 204 KBD_UNBUSY(kbd); 205 KBD_VALID(kbd); 206 kbd->kb_active = 0; /* disabled until someone calls kbd_enable() */ 207 kbd->kb_token = NULL; 208 kbd->kb_callback.kc_func = NULL; 209 kbd->kb_callback.kc_arg = NULL; 210 211 SLIST_FOREACH(p, &keyboard_drivers, link) { 212 if (strcmp(p->name, kbd->kb_name) == 0) { 213 keyboard[index] = kbd; 214 kbdsw[index] = p->kbdsw; 215 216 if (mux != NULL) { 217 bzero(&ki, sizeof(ki)); 218 strcpy(ki.kb_name, kbd->kb_name); 219 ki.kb_unit = kbd->kb_unit; 220 221 (*kbdsw[mux->kb_index]->ioctl) 222 (mux, KBADDKBD, (caddr_t) &ki); 223 } 224 225 return (index); 226 } 227 } 228 SET_FOREACH(list, kbddriver_set) { 229 p = *list; 230 if (strcmp(p->name, kbd->kb_name) == 0) { 231 keyboard[index] = kbd; 232 kbdsw[index] = p->kbdsw; 233 234 if (mux != NULL) { 235 bzero(&ki, sizeof(ki)); 236 strcpy(ki.kb_name, kbd->kb_name); 237 ki.kb_unit = kbd->kb_unit; 238 239 (*kbdsw[mux->kb_index]->ioctl) 240 (mux, KBADDKBD, (caddr_t) &ki); 241 } 242 243 return (index); 244 } 245 } 246 247 return (-1); 248 } 249 250 int 251 kbd_unregister(keyboard_t *kbd) 252 { 253 int error; 254 int s; 255 256 if ((kbd->kb_index < 0) || (kbd->kb_index >= keyboards)) 257 return (ENOENT); 258 if (keyboard[kbd->kb_index] != kbd) 259 return (ENOENT); 260 261 s = spltty(); 262 if (KBD_IS_BUSY(kbd)) { 263 error = (*kbd->kb_callback.kc_func)(kbd, KBDIO_UNLOADING, 264 kbd->kb_callback.kc_arg); 265 if (error) { 266 splx(s); 267 return (error); 268 } 269 if (KBD_IS_BUSY(kbd)) { 270 splx(s); 271 return (EBUSY); 272 } 273 } 274 KBD_INVALID(kbd); 275 keyboard[kbd->kb_index] = NULL; 276 kbdsw[kbd->kb_index] = NULL; 277 278 splx(s); 279 return (0); 280 } 281 282 /* find a funciton table by the driver name */ 283 keyboard_switch_t 284 *kbd_get_switch(char *driver) 285 { 286 const keyboard_driver_t **list; 287 const keyboard_driver_t *p; 288 289 SLIST_FOREACH(p, &keyboard_drivers, link) { 290 if (strcmp(p->name, driver) == 0) 291 return (p->kbdsw); 292 } 293 SET_FOREACH(list, kbddriver_set) { 294 p = *list; 295 if (strcmp(p->name, driver) == 0) 296 return (p->kbdsw); 297 } 298 299 return (NULL); 300 } 301 302 /* 303 * Keyboard client functions 304 * Keyboard clients, such as the console driver `syscons' and the keyboard 305 * cdev driver, use these functions to claim and release a keyboard for 306 * exclusive use. 307 */ 308 309 /* 310 * find the keyboard specified by a driver name and a unit number 311 * starting at given index 312 */ 313 int 314 kbd_find_keyboard2(char *driver, int unit, int index) 315 { 316 int i; 317 318 if ((index < 0) || (index >= keyboards)) 319 return (-1); 320 321 for (i = index; i < keyboards; ++i) { 322 if (keyboard[i] == NULL) 323 continue; 324 if (!KBD_IS_VALID(keyboard[i])) 325 continue; 326 if (strcmp("*", driver) && strcmp(keyboard[i]->kb_name, driver)) 327 continue; 328 if ((unit != -1) && (keyboard[i]->kb_unit != unit)) 329 continue; 330 return (i); 331 } 332 333 return (-1); 334 } 335 336 /* find the keyboard specified by a driver name and a unit number */ 337 int 338 kbd_find_keyboard(char *driver, int unit) 339 { 340 return (kbd_find_keyboard2(driver, unit, 0)); 341 } 342 343 /* allocate a keyboard */ 344 int 345 kbd_allocate(char *driver, int unit, void *id, kbd_callback_func_t *func, 346 void *arg) 347 { 348 int index; 349 int s; 350 351 if (func == NULL) 352 return (-1); 353 354 s = spltty(); 355 index = kbd_find_keyboard(driver, unit); 356 if (index >= 0) { 357 if (KBD_IS_BUSY(keyboard[index])) { 358 splx(s); 359 return (-1); 360 } 361 keyboard[index]->kb_token = id; 362 KBD_BUSY(keyboard[index]); 363 keyboard[index]->kb_callback.kc_func = func; 364 keyboard[index]->kb_callback.kc_arg = arg; 365 (*kbdsw[index]->clear_state)(keyboard[index]); 366 } 367 splx(s); 368 return (index); 369 } 370 371 int 372 kbd_release(keyboard_t *kbd, void *id) 373 { 374 int error; 375 int s; 376 377 s = spltty(); 378 if (!KBD_IS_VALID(kbd) || !KBD_IS_BUSY(kbd)) { 379 error = EINVAL; 380 } else if (kbd->kb_token != id) { 381 error = EPERM; 382 } else { 383 kbd->kb_token = NULL; 384 KBD_UNBUSY(kbd); 385 kbd->kb_callback.kc_func = NULL; 386 kbd->kb_callback.kc_arg = NULL; 387 (*kbdsw[kbd->kb_index]->clear_state)(kbd); 388 error = 0; 389 } 390 splx(s); 391 return (error); 392 } 393 394 int 395 kbd_change_callback(keyboard_t *kbd, void *id, kbd_callback_func_t *func, 396 void *arg) 397 { 398 int error; 399 int s; 400 401 s = spltty(); 402 if (!KBD_IS_VALID(kbd) || !KBD_IS_BUSY(kbd)) { 403 error = EINVAL; 404 } else if (kbd->kb_token != id) { 405 error = EPERM; 406 } else if (func == NULL) { 407 error = EINVAL; 408 } else { 409 kbd->kb_callback.kc_func = func; 410 kbd->kb_callback.kc_arg = arg; 411 error = 0; 412 } 413 splx(s); 414 return (error); 415 } 416 417 /* get a keyboard structure */ 418 keyboard_t 419 *kbd_get_keyboard(int index) 420 { 421 if ((index < 0) || (index >= keyboards)) 422 return (NULL); 423 if (keyboard[index] == NULL) 424 return (NULL); 425 if (!KBD_IS_VALID(keyboard[index])) 426 return (NULL); 427 return (keyboard[index]); 428 } 429 430 /* 431 * The back door for the console driver; configure keyboards 432 * This function is for the kernel console to initialize keyboards 433 * at very early stage. 434 */ 435 436 int 437 kbd_configure(int flags) 438 { 439 const keyboard_driver_t **list; 440 const keyboard_driver_t *p; 441 442 SLIST_FOREACH(p, &keyboard_drivers, link) { 443 if (p->configure != NULL) 444 (*p->configure)(flags); 445 } 446 SET_FOREACH(list, kbddriver_set) { 447 p = *list; 448 if (p->configure != NULL) 449 (*p->configure)(flags); 450 } 451 452 return (0); 453 } 454 455 #ifdef KBD_INSTALL_CDEV 456 457 /* 458 * Virtual keyboard cdev driver functions 459 * The virtual keyboard driver dispatches driver functions to 460 * appropriate subdrivers. 461 */ 462 463 #define KBD_UNIT(dev) minor(dev) 464 465 static d_open_t genkbdopen; 466 static d_close_t genkbdclose; 467 static d_read_t genkbdread; 468 static d_write_t genkbdwrite; 469 static d_ioctl_t genkbdioctl; 470 static d_poll_t genkbdpoll; 471 472 473 static struct cdevsw kbd_cdevsw = { 474 .d_version = D_VERSION, 475 .d_flags = D_NEEDGIANT, 476 .d_open = genkbdopen, 477 .d_close = genkbdclose, 478 .d_read = genkbdread, 479 .d_write = genkbdwrite, 480 .d_ioctl = genkbdioctl, 481 .d_poll = genkbdpoll, 482 .d_name = "kbd", 483 }; 484 485 int 486 kbd_attach(keyboard_t *kbd) 487 { 488 489 if (kbd->kb_index >= keyboards) 490 return (EINVAL); 491 if (keyboard[kbd->kb_index] != kbd) 492 return (EINVAL); 493 494 kbd->kb_dev = make_dev(&kbd_cdevsw, kbd->kb_index, UID_ROOT, GID_WHEEL, 495 0600, "%s%r", kbd->kb_name, kbd->kb_unit); 496 make_dev_alias(kbd->kb_dev, "kbd%r", kbd->kb_index); 497 kbd->kb_dev->si_drv1 = malloc(sizeof(genkbd_softc_t), M_DEVBUF, 498 M_WAITOK | M_ZERO); 499 printf("kbd%d at %s%d\n", kbd->kb_index, kbd->kb_name, kbd->kb_unit); 500 return (0); 501 } 502 503 int 504 kbd_detach(keyboard_t *kbd) 505 { 506 507 if (kbd->kb_index >= keyboards) 508 return (EINVAL); 509 if (keyboard[kbd->kb_index] != kbd) 510 return (EINVAL); 511 512 free(kbd->kb_dev->si_drv1, M_DEVBUF); 513 destroy_dev(kbd->kb_dev); 514 515 return (0); 516 } 517 518 /* 519 * Generic keyboard cdev driver functions 520 * Keyboard subdrivers may call these functions to implement common 521 * driver functions. 522 */ 523 524 #define KB_QSIZE 512 525 #define KB_BUFSIZE 64 526 527 static kbd_callback_func_t genkbd_event; 528 529 static int 530 genkbdopen(struct cdev *dev, int mode, int flag, struct thread *td) 531 { 532 keyboard_t *kbd; 533 genkbd_softc_t *sc; 534 int s; 535 int i; 536 537 s = spltty(); 538 sc = dev->si_drv1; 539 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 540 if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) { 541 splx(s); 542 return (ENXIO); 543 } 544 i = kbd_allocate(kbd->kb_name, kbd->kb_unit, sc, 545 genkbd_event, (void *)sc); 546 if (i < 0) { 547 splx(s); 548 return (EBUSY); 549 } 550 /* assert(i == kbd->kb_index) */ 551 /* assert(kbd == kbd_get_keyboard(i)) */ 552 553 /* 554 * NOTE: even when we have successfully claimed a keyboard, 555 * the device may still be missing (!KBD_HAS_DEVICE(kbd)). 556 */ 557 558 #if 0 559 bzero(&sc->gkb_q, sizeof(sc->gkb_q)); 560 #endif 561 clist_alloc_cblocks(&sc->gkb_q, KB_QSIZE, KB_QSIZE/2); /* XXX */ 562 splx(s); 563 564 return (0); 565 } 566 567 static int 568 genkbdclose(struct cdev *dev, int mode, int flag, struct thread *td) 569 { 570 keyboard_t *kbd; 571 genkbd_softc_t *sc; 572 int s; 573 574 /* 575 * NOTE: the device may have already become invalid. 576 * kbd == NULL || !KBD_IS_VALID(kbd) 577 */ 578 s = spltty(); 579 sc = dev->si_drv1; 580 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 581 if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) { 582 /* XXX: we shall be forgiving and don't report error... */ 583 } else { 584 kbd_release(kbd, (void *)sc); 585 #if 0 586 clist_free_cblocks(&sc->gkb_q); 587 #endif 588 } 589 splx(s); 590 return (0); 591 } 592 593 static int 594 genkbdread(struct cdev *dev, struct uio *uio, int flag) 595 { 596 keyboard_t *kbd; 597 genkbd_softc_t *sc; 598 u_char buffer[KB_BUFSIZE]; 599 int len; 600 int error; 601 int s; 602 603 /* wait for input */ 604 s = spltty(); 605 sc = dev->si_drv1; 606 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 607 if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) { 608 splx(s); 609 return (ENXIO); 610 } 611 while (sc->gkb_q.c_cc == 0) { 612 if (flag & O_NONBLOCK) { 613 splx(s); 614 return (EWOULDBLOCK); 615 } 616 sc->gkb_flags |= KB_ASLEEP; 617 error = tsleep(sc, PZERO | PCATCH, "kbdrea", 0); 618 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 619 if ((kbd == NULL) || !KBD_IS_VALID(kbd)) { 620 splx(s); 621 return (ENXIO); /* our keyboard has gone... */ 622 } 623 if (error) { 624 sc->gkb_flags &= ~KB_ASLEEP; 625 splx(s); 626 return (error); 627 } 628 } 629 splx(s); 630 631 /* copy as much input as possible */ 632 error = 0; 633 while (uio->uio_resid > 0) { 634 len = imin(uio->uio_resid, sizeof(buffer)); 635 len = q_to_b(&sc->gkb_q, buffer, len); 636 if (len <= 0) 637 break; 638 error = uiomove(buffer, len, uio); 639 if (error) 640 break; 641 } 642 643 return (error); 644 } 645 646 static int 647 genkbdwrite(struct cdev *dev, struct uio *uio, int flag) 648 { 649 keyboard_t *kbd; 650 651 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 652 if ((kbd == NULL) || !KBD_IS_VALID(kbd)) 653 return (ENXIO); 654 return (ENODEV); 655 } 656 657 static int 658 genkbdioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td) 659 { 660 keyboard_t *kbd; 661 int error; 662 663 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 664 if ((kbd == NULL) || !KBD_IS_VALID(kbd)) 665 return (ENXIO); 666 error = (*kbdsw[kbd->kb_index]->ioctl)(kbd, cmd, arg); 667 if (error == ENOIOCTL) 668 error = ENODEV; 669 return (error); 670 } 671 672 static int 673 genkbdpoll(struct cdev *dev, int events, struct thread *td) 674 { 675 keyboard_t *kbd; 676 genkbd_softc_t *sc; 677 int revents; 678 int s; 679 680 revents = 0; 681 s = spltty(); 682 sc = dev->si_drv1; 683 kbd = kbd_get_keyboard(KBD_INDEX(dev)); 684 if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) { 685 revents = POLLHUP; /* the keyboard has gone */ 686 } else if (events & (POLLIN | POLLRDNORM)) { 687 if (sc->gkb_q.c_cc > 0) 688 revents = events & (POLLIN | POLLRDNORM); 689 else 690 selrecord(td, &sc->gkb_rsel); 691 } 692 splx(s); 693 return (revents); 694 } 695 696 static int 697 genkbd_event(keyboard_t *kbd, int event, void *arg) 698 { 699 genkbd_softc_t *sc; 700 size_t len; 701 u_char *cp; 702 int mode; 703 int c; 704 705 /* assert(KBD_IS_VALID(kbd)) */ 706 sc = (genkbd_softc_t *)arg; 707 708 switch (event) { 709 case KBDIO_KEYINPUT: 710 break; 711 case KBDIO_UNLOADING: 712 /* the keyboard is going... */ 713 kbd_release(kbd, (void *)sc); 714 if (sc->gkb_flags & KB_ASLEEP) { 715 sc->gkb_flags &= ~KB_ASLEEP; 716 wakeup(sc); 717 } 718 selwakeuppri(&sc->gkb_rsel, PZERO); 719 return (0); 720 default: 721 return (EINVAL); 722 } 723 724 /* obtain the current key input mode */ 725 if ((*kbdsw[kbd->kb_index]->ioctl)(kbd, KDGKBMODE, (caddr_t)&mode)) 726 mode = K_XLATE; 727 728 /* read all pending input */ 729 while ((*kbdsw[kbd->kb_index]->check_char)(kbd)) { 730 c = (*kbdsw[kbd->kb_index]->read_char)(kbd, FALSE); 731 if (c == NOKEY) 732 continue; 733 if (c == ERRKEY) /* XXX: ring bell? */ 734 continue; 735 if (!KBD_IS_BUSY(kbd)) 736 /* the device is not open, discard the input */ 737 continue; 738 739 /* store the byte as is for K_RAW and K_CODE modes */ 740 if (mode != K_XLATE) { 741 putc(KEYCHAR(c), &sc->gkb_q); 742 continue; 743 } 744 745 /* K_XLATE */ 746 if (c & RELKEY) /* key release is ignored */ 747 continue; 748 749 /* process special keys; most of them are just ignored... */ 750 if (c & SPCLKEY) { 751 switch (KEYCHAR(c)) { 752 default: 753 /* ignore them... */ 754 continue; 755 case BTAB: /* a backtab: ESC [ Z */ 756 putc(0x1b, &sc->gkb_q); 757 putc('[', &sc->gkb_q); 758 putc('Z', &sc->gkb_q); 759 continue; 760 } 761 } 762 763 /* normal chars, normal chars with the META, function keys */ 764 switch (KEYFLAGS(c)) { 765 case 0: /* a normal char */ 766 putc(KEYCHAR(c), &sc->gkb_q); 767 break; 768 case MKEY: /* the META flag: prepend ESC */ 769 putc(0x1b, &sc->gkb_q); 770 putc(KEYCHAR(c), &sc->gkb_q); 771 break; 772 case FKEY | SPCLKEY: /* a function key, return string */ 773 cp = (*kbdsw[kbd->kb_index]->get_fkeystr)(kbd, 774 KEYCHAR(c), &len); 775 if (cp != NULL) { 776 while (len-- > 0) 777 putc(*cp++, &sc->gkb_q); 778 } 779 break; 780 } 781 } 782 783 /* wake up sleeping/polling processes */ 784 if (sc->gkb_q.c_cc > 0) { 785 if (sc->gkb_flags & KB_ASLEEP) { 786 sc->gkb_flags &= ~KB_ASLEEP; 787 wakeup(sc); 788 } 789 selwakeuppri(&sc->gkb_rsel, PZERO); 790 } 791 792 return (0); 793 } 794 795 #endif /* KBD_INSTALL_CDEV */ 796 797 /* 798 * Generic low-level keyboard functions 799 * The low-level functions in the keyboard subdriver may use these 800 * functions. 801 */ 802 803 #ifndef KBD_DISABLE_KEYMAP_LOAD 804 static int key_change_ok(struct keyent_t *, struct keyent_t *, struct thread *); 805 static int keymap_change_ok(keymap_t *, keymap_t *, struct thread *); 806 static int accent_change_ok(accentmap_t *, accentmap_t *, struct thread *); 807 static int fkey_change_ok(fkeytab_t *, fkeyarg_t *, struct thread *); 808 #endif 809 810 int 811 genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 812 { 813 keyarg_t *keyp; 814 fkeyarg_t *fkeyp; 815 int s; 816 int i; 817 #ifndef KBD_DISABLE_KEYMAP_LOAD 818 int error; 819 #endif 820 821 s = spltty(); 822 switch (cmd) { 823 824 case KDGKBINFO: /* get keyboard information */ 825 ((keyboard_info_t *)arg)->kb_index = kbd->kb_index; 826 i = imin(strlen(kbd->kb_name) + 1, 827 sizeof(((keyboard_info_t *)arg)->kb_name)); 828 bcopy(kbd->kb_name, ((keyboard_info_t *)arg)->kb_name, i); 829 ((keyboard_info_t *)arg)->kb_unit = kbd->kb_unit; 830 ((keyboard_info_t *)arg)->kb_type = kbd->kb_type; 831 ((keyboard_info_t *)arg)->kb_config = kbd->kb_config; 832 ((keyboard_info_t *)arg)->kb_flags = kbd->kb_flags; 833 break; 834 835 case KDGKBTYPE: /* get keyboard type */ 836 *(int *)arg = kbd->kb_type; 837 break; 838 839 case KDGETREPEAT: /* get keyboard repeat rate */ 840 ((int *)arg)[0] = kbd->kb_delay1; 841 ((int *)arg)[1] = kbd->kb_delay2; 842 break; 843 844 case GIO_KEYMAP: /* get keyboard translation table */ 845 bcopy(kbd->kb_keymap, arg, sizeof(*kbd->kb_keymap)); 846 break; 847 case PIO_KEYMAP: /* set keyboard translation table */ 848 #ifndef KBD_DISABLE_KEYMAP_LOAD 849 error = keymap_change_ok(kbd->kb_keymap, (keymap_t *)arg, 850 curthread); 851 if (error != 0) { 852 splx(s); 853 return (error); 854 } 855 bzero(kbd->kb_accentmap, sizeof(*kbd->kb_accentmap)); 856 bcopy(arg, kbd->kb_keymap, sizeof(*kbd->kb_keymap)); 857 break; 858 #else 859 splx(s); 860 return (ENODEV); 861 #endif 862 863 case GIO_KEYMAPENT: /* get keyboard translation table entry */ 864 keyp = (keyarg_t *)arg; 865 if (keyp->keynum >= sizeof(kbd->kb_keymap->key) / 866 sizeof(kbd->kb_keymap->key[0])) { 867 splx(s); 868 return (EINVAL); 869 } 870 bcopy(&kbd->kb_keymap->key[keyp->keynum], &keyp->key, 871 sizeof(keyp->key)); 872 break; 873 case PIO_KEYMAPENT: /* set keyboard translation table entry */ 874 #ifndef KBD_DISABLE_KEYMAP_LOAD 875 keyp = (keyarg_t *)arg; 876 if (keyp->keynum >= sizeof(kbd->kb_keymap->key) / 877 sizeof(kbd->kb_keymap->key[0])) { 878 splx(s); 879 return (EINVAL); 880 } 881 error = key_change_ok(&kbd->kb_keymap->key[keyp->keynum], 882 &keyp->key, curthread); 883 if (error != 0) { 884 splx(s); 885 return (error); 886 } 887 bcopy(&keyp->key, &kbd->kb_keymap->key[keyp->keynum], 888 sizeof(keyp->key)); 889 break; 890 #else 891 splx(s); 892 return (ENODEV); 893 #endif 894 895 case GIO_DEADKEYMAP: /* get accent key translation table */ 896 bcopy(kbd->kb_accentmap, arg, sizeof(*kbd->kb_accentmap)); 897 break; 898 case PIO_DEADKEYMAP: /* set accent key translation table */ 899 #ifndef KBD_DISABLE_KEYMAP_LOAD 900 error = accent_change_ok(kbd->kb_accentmap, 901 (accentmap_t *)arg, curthread); 902 if (error != 0) { 903 splx(s); 904 return (error); 905 } 906 bcopy(arg, kbd->kb_accentmap, sizeof(*kbd->kb_accentmap)); 907 break; 908 #else 909 splx(s); 910 return (ENODEV); 911 #endif 912 913 case GETFKEY: /* get functionkey string */ 914 fkeyp = (fkeyarg_t *)arg; 915 if (fkeyp->keynum >= kbd->kb_fkeytab_size) { 916 splx(s); 917 return (EINVAL); 918 } 919 bcopy(kbd->kb_fkeytab[fkeyp->keynum].str, fkeyp->keydef, 920 kbd->kb_fkeytab[fkeyp->keynum].len); 921 fkeyp->flen = kbd->kb_fkeytab[fkeyp->keynum].len; 922 break; 923 case SETFKEY: /* set functionkey string */ 924 #ifndef KBD_DISABLE_KEYMAP_LOAD 925 fkeyp = (fkeyarg_t *)arg; 926 if (fkeyp->keynum >= kbd->kb_fkeytab_size) { 927 splx(s); 928 return (EINVAL); 929 } 930 error = fkey_change_ok(&kbd->kb_fkeytab[fkeyp->keynum], 931 fkeyp, curthread); 932 if (error != 0) { 933 splx(s); 934 return (error); 935 } 936 kbd->kb_fkeytab[fkeyp->keynum].len = imin(fkeyp->flen, MAXFK); 937 bcopy(fkeyp->keydef, kbd->kb_fkeytab[fkeyp->keynum].str, 938 kbd->kb_fkeytab[fkeyp->keynum].len); 939 break; 940 #else 941 splx(s); 942 return (ENODEV); 943 #endif 944 945 default: 946 splx(s); 947 return (ENOIOCTL); 948 } 949 950 splx(s); 951 return (0); 952 } 953 954 #ifndef KBD_DISABLE_KEYMAP_LOAD 955 #define RESTRICTED_KEY(key, i) \ 956 ((key->spcl & (0x80 >> i)) && \ 957 (key->map[i] == RBT || key->map[i] == SUSP || \ 958 key->map[i] == STBY || key->map[i] == DBG || \ 959 key->map[i] == PNC || key->map[i] == HALT || \ 960 key->map[i] == PDWN)) 961 962 static int 963 key_change_ok(struct keyent_t *oldkey, struct keyent_t *newkey, struct thread *td) 964 { 965 int i; 966 967 /* Low keymap_restrict_change means any changes are OK. */ 968 if (keymap_restrict_change <= 0) 969 return (0); 970 971 /* High keymap_restrict_change means only root can change the keymap. */ 972 if (keymap_restrict_change >= 2) { 973 for (i = 0; i < NUM_STATES; i++) 974 if (oldkey->map[i] != newkey->map[i]) 975 return suser(td); 976 if (oldkey->spcl != newkey->spcl) 977 return suser(td); 978 if (oldkey->flgs != newkey->flgs) 979 return suser(td); 980 return (0); 981 } 982 983 /* Otherwise we have to see if any special keys are being changed. */ 984 for (i = 0; i < NUM_STATES; i++) { 985 /* 986 * If either the oldkey or the newkey action is restricted 987 * then we must make sure that the action doesn't change. 988 */ 989 if (!RESTRICTED_KEY(oldkey, i) && !RESTRICTED_KEY(newkey, i)) 990 continue; 991 if ((oldkey->spcl & (0x80 >> i)) == (newkey->spcl & (0x80 >> i)) 992 && oldkey->map[i] == newkey->map[i]) 993 continue; 994 return suser(td); 995 } 996 997 return (0); 998 } 999 1000 static int 1001 keymap_change_ok(keymap_t *oldmap, keymap_t *newmap, struct thread *td) 1002 { 1003 int keycode, error; 1004 1005 for (keycode = 0; keycode < NUM_KEYS; keycode++) { 1006 if ((error = key_change_ok(&oldmap->key[keycode], 1007 &newmap->key[keycode], td)) != 0) 1008 return (error); 1009 } 1010 return (0); 1011 } 1012 1013 static int 1014 accent_change_ok(accentmap_t *oldmap, accentmap_t *newmap, struct thread *td) 1015 { 1016 struct acc_t *oldacc, *newacc; 1017 int accent, i; 1018 1019 if (keymap_restrict_change <= 2) 1020 return (0); 1021 1022 if (oldmap->n_accs != newmap->n_accs) 1023 return suser(td); 1024 1025 for (accent = 0; accent < oldmap->n_accs; accent++) { 1026 oldacc = &oldmap->acc[accent]; 1027 newacc = &newmap->acc[accent]; 1028 if (oldacc->accchar != newacc->accchar) 1029 return suser(td); 1030 for (i = 0; i < NUM_ACCENTCHARS; ++i) { 1031 if (oldacc->map[i][0] != newacc->map[i][0]) 1032 return suser(td); 1033 if (oldacc->map[i][0] == 0) /* end of table */ 1034 break; 1035 if (oldacc->map[i][1] != newacc->map[i][1]) 1036 return suser(td); 1037 } 1038 } 1039 1040 return (0); 1041 } 1042 1043 static int 1044 fkey_change_ok(fkeytab_t *oldkey, fkeyarg_t *newkey, struct thread *td) 1045 { 1046 if (keymap_restrict_change <= 3) 1047 return (0); 1048 1049 if (oldkey->len != newkey->flen || 1050 bcmp(oldkey->str, newkey->keydef, oldkey->len) != 0) 1051 return suser(td); 1052 1053 return (0); 1054 } 1055 #endif 1056 1057 /* get a pointer to the string associated with the given function key */ 1058 u_char 1059 *genkbd_get_fkeystr(keyboard_t *kbd, int fkey, size_t *len) 1060 { 1061 if (kbd == NULL) 1062 return (NULL); 1063 fkey -= F_FN; 1064 if (fkey > kbd->kb_fkeytab_size) 1065 return (NULL); 1066 *len = kbd->kb_fkeytab[fkey].len; 1067 return (kbd->kb_fkeytab[fkey].str); 1068 } 1069 1070 /* diagnostic dump */ 1071 static char 1072 *get_kbd_type_name(int type) 1073 { 1074 static struct { 1075 int type; 1076 char *name; 1077 } name_table[] = { 1078 { KB_84, "AT 84" }, 1079 { KB_101, "AT 101/102" }, 1080 { KB_OTHER, "generic" }, 1081 }; 1082 int i; 1083 1084 for (i = 0; i < sizeof(name_table)/sizeof(name_table[0]); ++i) { 1085 if (type == name_table[i].type) 1086 return (name_table[i].name); 1087 } 1088 return ("unknown"); 1089 } 1090 1091 void 1092 genkbd_diag(keyboard_t *kbd, int level) 1093 { 1094 if (level > 0) { 1095 printf("kbd%d: %s%d, %s (%d), config:0x%x, flags:0x%x", 1096 kbd->kb_index, kbd->kb_name, kbd->kb_unit, 1097 get_kbd_type_name(kbd->kb_type), kbd->kb_type, 1098 kbd->kb_config, kbd->kb_flags); 1099 if (kbd->kb_io_base > 0) 1100 printf(", port:0x%x-0x%x", kbd->kb_io_base, 1101 kbd->kb_io_base + kbd->kb_io_size - 1); 1102 printf("\n"); 1103 } 1104 } 1105 1106 #define set_lockkey_state(k, s, l) \ 1107 if (!((s) & l ## DOWN)) { \ 1108 int i; \ 1109 (s) |= l ## DOWN; \ 1110 (s) ^= l ## ED; \ 1111 i = (s) & LOCK_MASK; \ 1112 (*kbdsw[(k)->kb_index]->ioctl)((k), KDSETLED, (caddr_t)&i); \ 1113 } 1114 1115 static u_int 1116 save_accent_key(keyboard_t *kbd, u_int key, int *accents) 1117 { 1118 int i; 1119 1120 /* make an index into the accent map */ 1121 i = key - F_ACC + 1; 1122 if ((i > kbd->kb_accentmap->n_accs) 1123 || (kbd->kb_accentmap->acc[i - 1].accchar == 0)) { 1124 /* the index is out of range or pointing to an empty entry */ 1125 *accents = 0; 1126 return (ERRKEY); 1127 } 1128 1129 /* 1130 * If the same accent key has been hit twice, produce the accent 1131 * char itself. 1132 */ 1133 if (i == *accents) { 1134 key = kbd->kb_accentmap->acc[i - 1].accchar; 1135 *accents = 0; 1136 return (key); 1137 } 1138 1139 /* remember the index and wait for the next key */ 1140 *accents = i; 1141 return (NOKEY); 1142 } 1143 1144 static u_int 1145 make_accent_char(keyboard_t *kbd, u_int ch, int *accents) 1146 { 1147 struct acc_t *acc; 1148 int i; 1149 1150 acc = &kbd->kb_accentmap->acc[*accents - 1]; 1151 *accents = 0; 1152 1153 /* 1154 * If the accent key is followed by the space key, 1155 * produce the accent char itself. 1156 */ 1157 if (ch == ' ') 1158 return (acc->accchar); 1159 1160 /* scan the accent map */ 1161 for (i = 0; i < NUM_ACCENTCHARS; ++i) { 1162 if (acc->map[i][0] == 0) /* end of table */ 1163 break; 1164 if (acc->map[i][0] == ch) 1165 return (acc->map[i][1]); 1166 } 1167 /* this char cannot be accented... */ 1168 return (ERRKEY); 1169 } 1170 1171 int 1172 genkbd_keyaction(keyboard_t *kbd, int keycode, int up, int *shiftstate, 1173 int *accents) 1174 { 1175 struct keyent_t *key; 1176 int state = *shiftstate; 1177 int action; 1178 int f; 1179 int i; 1180 1181 i = keycode; 1182 f = state & (AGRS | ALKED); 1183 if ((f == AGRS1) || (f == AGRS2) || (f == ALKED)) 1184 i += ALTGR_OFFSET; 1185 key = &kbd->kb_keymap->key[i]; 1186 i = ((state & SHIFTS) ? 1 : 0) 1187 | ((state & CTLS) ? 2 : 0) 1188 | ((state & ALTS) ? 4 : 0); 1189 if (((key->flgs & FLAG_LOCK_C) && (state & CLKED)) 1190 || ((key->flgs & FLAG_LOCK_N) && (state & NLKED)) ) 1191 i ^= 1; 1192 1193 if (up) { /* break: key released */ 1194 action = kbd->kb_lastact[keycode]; 1195 kbd->kb_lastact[keycode] = NOP; 1196 switch (action) { 1197 case LSHA: 1198 if (state & SHIFTAON) { 1199 set_lockkey_state(kbd, state, ALK); 1200 state &= ~ALKDOWN; 1201 } 1202 action = LSH; 1203 /* FALL THROUGH */ 1204 case LSH: 1205 state &= ~SHIFTS1; 1206 break; 1207 case RSHA: 1208 if (state & SHIFTAON) { 1209 set_lockkey_state(kbd, state, ALK); 1210 state &= ~ALKDOWN; 1211 } 1212 action = RSH; 1213 /* FALL THROUGH */ 1214 case RSH: 1215 state &= ~SHIFTS2; 1216 break; 1217 case LCTRA: 1218 if (state & SHIFTAON) { 1219 set_lockkey_state(kbd, state, ALK); 1220 state &= ~ALKDOWN; 1221 } 1222 action = LCTR; 1223 /* FALL THROUGH */ 1224 case LCTR: 1225 state &= ~CTLS1; 1226 break; 1227 case RCTRA: 1228 if (state & SHIFTAON) { 1229 set_lockkey_state(kbd, state, ALK); 1230 state &= ~ALKDOWN; 1231 } 1232 action = RCTR; 1233 /* FALL THROUGH */ 1234 case RCTR: 1235 state &= ~CTLS2; 1236 break; 1237 case LALTA: 1238 if (state & SHIFTAON) { 1239 set_lockkey_state(kbd, state, ALK); 1240 state &= ~ALKDOWN; 1241 } 1242 action = LALT; 1243 /* FALL THROUGH */ 1244 case LALT: 1245 state &= ~ALTS1; 1246 break; 1247 case RALTA: 1248 if (state & SHIFTAON) { 1249 set_lockkey_state(kbd, state, ALK); 1250 state &= ~ALKDOWN; 1251 } 1252 action = RALT; 1253 /* FALL THROUGH */ 1254 case RALT: 1255 state &= ~ALTS2; 1256 break; 1257 case ASH: 1258 state &= ~AGRS1; 1259 break; 1260 case META: 1261 state &= ~METAS1; 1262 break; 1263 case NLK: 1264 state &= ~NLKDOWN; 1265 break; 1266 case CLK: 1267 #ifndef PC98 1268 state &= ~CLKDOWN; 1269 #else 1270 state &= ~CLKED; 1271 i = state & LOCK_MASK; 1272 (*kbdsw[kbd->kb_index]->ioctl)(kbd, KDSETLED, 1273 (caddr_t)&i); 1274 #endif 1275 break; 1276 case SLK: 1277 state &= ~SLKDOWN; 1278 break; 1279 case ALK: 1280 state &= ~ALKDOWN; 1281 break; 1282 case NOP: 1283 /* release events of regular keys are not reported */ 1284 *shiftstate &= ~SHIFTAON; 1285 return (NOKEY); 1286 } 1287 *shiftstate = state & ~SHIFTAON; 1288 return (SPCLKEY | RELKEY | action); 1289 } else { /* make: key pressed */ 1290 action = key->map[i]; 1291 state &= ~SHIFTAON; 1292 if (key->spcl & (0x80 >> i)) { 1293 /* special keys */ 1294 if (kbd->kb_lastact[keycode] == NOP) 1295 kbd->kb_lastact[keycode] = action; 1296 if (kbd->kb_lastact[keycode] != action) 1297 action = NOP; 1298 switch (action) { 1299 /* LOCKING KEYS */ 1300 case NLK: 1301 set_lockkey_state(kbd, state, NLK); 1302 break; 1303 case CLK: 1304 #ifndef PC98 1305 set_lockkey_state(kbd, state, CLK); 1306 #else 1307 state |= CLKED; 1308 i = state & LOCK_MASK; 1309 (*kbdsw[kbd->kb_index]->ioctl)(kbd, KDSETLED, 1310 (caddr_t)&i); 1311 #endif 1312 break; 1313 case SLK: 1314 set_lockkey_state(kbd, state, SLK); 1315 break; 1316 case ALK: 1317 set_lockkey_state(kbd, state, ALK); 1318 break; 1319 /* NON-LOCKING KEYS */ 1320 case SPSC: case RBT: case SUSP: case STBY: 1321 case DBG: case NEXT: case PREV: case PNC: 1322 case HALT: case PDWN: 1323 *accents = 0; 1324 break; 1325 case BTAB: 1326 *accents = 0; 1327 action |= BKEY; 1328 break; 1329 case LSHA: 1330 state |= SHIFTAON; 1331 action = LSH; 1332 /* FALL THROUGH */ 1333 case LSH: 1334 state |= SHIFTS1; 1335 break; 1336 case RSHA: 1337 state |= SHIFTAON; 1338 action = RSH; 1339 /* FALL THROUGH */ 1340 case RSH: 1341 state |= SHIFTS2; 1342 break; 1343 case LCTRA: 1344 state |= SHIFTAON; 1345 action = LCTR; 1346 /* FALL THROUGH */ 1347 case LCTR: 1348 state |= CTLS1; 1349 break; 1350 case RCTRA: 1351 state |= SHIFTAON; 1352 action = RCTR; 1353 /* FALL THROUGH */ 1354 case RCTR: 1355 state |= CTLS2; 1356 break; 1357 case LALTA: 1358 state |= SHIFTAON; 1359 action = LALT; 1360 /* FALL THROUGH */ 1361 case LALT: 1362 state |= ALTS1; 1363 break; 1364 case RALTA: 1365 state |= SHIFTAON; 1366 action = RALT; 1367 /* FALL THROUGH */ 1368 case RALT: 1369 state |= ALTS2; 1370 break; 1371 case ASH: 1372 state |= AGRS1; 1373 break; 1374 case META: 1375 state |= METAS1; 1376 break; 1377 case NOP: 1378 *shiftstate = state; 1379 return (NOKEY); 1380 default: 1381 /* is this an accent (dead) key? */ 1382 *shiftstate = state; 1383 if (action >= F_ACC && action <= L_ACC) { 1384 action = save_accent_key(kbd, action, 1385 accents); 1386 switch (action) { 1387 case NOKEY: 1388 case ERRKEY: 1389 return (action); 1390 default: 1391 if (state & METAS) 1392 return (action | MKEY); 1393 else 1394 return (action); 1395 } 1396 /* NOT REACHED */ 1397 } 1398 /* other special keys */ 1399 if (*accents > 0) { 1400 *accents = 0; 1401 return (ERRKEY); 1402 } 1403 if (action >= F_FN && action <= L_FN) 1404 action |= FKEY; 1405 /* XXX: return fkey string for the FKEY? */ 1406 return (SPCLKEY | action); 1407 } 1408 *shiftstate = state; 1409 return (SPCLKEY | action); 1410 } else { 1411 /* regular keys */ 1412 kbd->kb_lastact[keycode] = NOP; 1413 *shiftstate = state; 1414 if (*accents > 0) { 1415 /* make an accented char */ 1416 action = make_accent_char(kbd, action, accents); 1417 if (action == ERRKEY) 1418 return (action); 1419 } 1420 if (state & METAS) 1421 action |= MKEY; 1422 return (action); 1423 } 1424 } 1425 /* NOT REACHED */ 1426 }
Cache object: 3f52d1e393a96db0a09eb0c7ee8fb5cd
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