1 /*- 2 * (MPSAFE) 3 * 4 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer as 12 * the first lines of this file unmodified. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/dev/kbd/atkbd.c,v 1.25.2.4 2002/04/08 19:21:38 asmodai Exp $ 29 * $DragonFly: src/sys/dev/misc/kbd/atkbd.c,v 1.14 2007/04/22 10:43:00 y0netan1 Exp $ 30 */ 31 /* 32 * NOTE: All locks are handled by the kbd wrappers. 33 */ 34 35 #include "opt_kbd.h" 36 #include "opt_atkbd.h" 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/bus.h> 42 #include <sys/proc.h> 43 #include <sys/malloc.h> 44 #include <sys/thread2.h> 45 46 #ifdef __i386__ 47 #include <machine/md_var.h> 48 #include <machine/psl.h> 49 #include <machine/vm86.h> 50 #include <machine/pc/bios.h> 51 52 #include <vm/vm.h> 53 #include <vm/pmap.h> 54 #endif /* __i386__ */ 55 56 #include <sys/kbio.h> 57 #include "kbdreg.h" 58 #include "atkbdreg.h" 59 #include "atkbdcreg.h" 60 61 #include <bus/isa/isareg.h> 62 63 static timeout_t atkbd_timeout; 64 65 int 66 atkbd_probe_unit(int unit, int ctlr, int irq, int flags) 67 { 68 keyboard_switch_t *sw; 69 int args[2]; 70 int error; 71 72 sw = kbd_get_switch(ATKBD_DRIVER_NAME); 73 if (sw == NULL) { 74 return ENXIO; 75 } 76 77 args[0] = ctlr; 78 args[1] = irq; 79 error = (*sw->probe)(unit, args, flags); 80 81 if (error) 82 return error; 83 return 0; 84 } 85 86 int 87 atkbd_attach_unit(int unit, keyboard_t **kbd, int ctlr, int irq, int flags) 88 { 89 keyboard_switch_t *sw; 90 int args[2]; 91 int error; 92 93 sw = kbd_get_switch(ATKBD_DRIVER_NAME); 94 if (sw == NULL) { 95 return ENXIO; 96 } 97 98 /* reset, initialize and enable the device */ 99 args[0] = ctlr; 100 args[1] = irq; 101 *kbd = NULL; 102 error = (*sw->probe)(unit, args, flags); 103 if (error) { 104 return error; 105 } 106 error = (*sw->init)(unit, kbd, args, flags); 107 if (error) { 108 return error; 109 } 110 (*sw->enable)(*kbd); 111 112 #ifdef KBD_INSTALL_CDEV 113 /* attach a virtual keyboard cdev */ 114 error = kbd_attach(*kbd); 115 if (error) { 116 return error; 117 } 118 #endif 119 120 /* 121 * This is a kludge to compensate for lost keyboard interrupts. 122 * A similar code used to be in syscons. See below. XXX 123 */ 124 atkbd_timeout(*kbd); 125 126 if (bootverbose) 127 (*sw->diag)(*kbd, bootverbose); 128 129 return 0; 130 } 131 132 static void 133 atkbd_timeout(void *arg) 134 { 135 keyboard_t *kbd; 136 137 /* 138 * The original text of the following comments are extracted 139 * from syscons.c (1.287) 140 * 141 * With release 2.1 of the Xaccel server, the keyboard is left 142 * hanging pretty often. Apparently an interrupt from the 143 * keyboard is lost, and I don't know why (yet). 144 * This ugly hack calls the low-level interrupt routine if input 145 * is ready for the keyboard and conveniently hides the problem. XXX 146 * 147 * Try removing anything stuck in the keyboard controller; whether 148 * it's a keyboard scan code or mouse data. The low-level 149 * interrupt routine doesn't read the mouse data directly, 150 * but the keyboard controller driver will, as a side effect. 151 */ 152 /* 153 * And here is bde's original comment about this: 154 * 155 * This is necessary to handle edge triggered interrupts - if we 156 * returned when our IRQ is high due to unserviced input, then there 157 * would be no more keyboard IRQs until the keyboard is reset by 158 * external powers. 159 * 160 * The keyboard apparently unwedges the irq in most cases. 161 */ 162 crit_enter(); 163 kbd = (keyboard_t *)arg; 164 if (kbd_lock(kbd, TRUE)) { 165 /* 166 * We have seen the lock flag is not set. Let's reset 167 * the flag early, otherwise the LED update routine fails 168 * which may want the lock during the interrupt routine. 169 */ 170 kbd_lock(kbd, FALSE); 171 if (kbd_check_char(kbd)) 172 kbd_intr(kbd, NULL); 173 } 174 callout_reset(&kbd->kb_atkbd_timeout_ch, hz / 10, atkbd_timeout, arg); 175 crit_exit(); 176 } 177 178 /* LOW-LEVEL */ 179 180 #include <machine/limits.h> 181 #include <machine/clock.h> 182 183 #define ATKBD_DEFAULT 0 184 185 typedef struct atkbd_state { 186 KBDC kbdc; /* keyboard controller */ 187 int ks_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */ 188 int ks_flags; /* flags */ 189 #define COMPOSE (1 << 0) 190 int ks_polling; 191 int ks_state; /* shift/lock key state */ 192 int ks_accents; /* accent key index (> 0) */ 193 u_int ks_composed_char; /* composed char code (> 0) */ 194 u_char ks_prefix; /* AT scan code prefix */ 195 } atkbd_state_t; 196 197 /* keyboard driver declaration */ 198 static int atkbd_configure(int flags); 199 static kbd_probe_t atkbd_probe; 200 static kbd_init_t atkbd_init; 201 static kbd_term_t atkbd_term; 202 static kbd_intr_t atkbd_intr; 203 static kbd_test_if_t atkbd_test_if; 204 static kbd_enable_t atkbd_enable; 205 static kbd_disable_t atkbd_disable; 206 static kbd_read_t atkbd_read; 207 static kbd_check_t atkbd_check; 208 static kbd_read_char_t atkbd_read_char; 209 static kbd_check_char_t atkbd_check_char; 210 static kbd_ioctl_t atkbd_ioctl; 211 static kbd_lock_t atkbd_lock; 212 static kbd_clear_state_t atkbd_clear_state; 213 static kbd_get_state_t atkbd_get_state; 214 static kbd_set_state_t atkbd_set_state; 215 static kbd_poll_mode_t atkbd_poll; 216 217 keyboard_switch_t atkbdsw = { 218 atkbd_probe, 219 atkbd_init, 220 atkbd_term, 221 atkbd_intr, 222 atkbd_test_if, 223 atkbd_enable, 224 atkbd_disable, 225 atkbd_read, 226 atkbd_check, 227 atkbd_read_char, 228 atkbd_check_char, 229 atkbd_ioctl, 230 atkbd_lock, 231 atkbd_clear_state, 232 atkbd_get_state, 233 atkbd_set_state, 234 genkbd_get_fkeystr, 235 atkbd_poll, 236 genkbd_diag, 237 }; 238 239 KEYBOARD_DRIVER(atkbd, atkbdsw, atkbd_configure); 240 241 /* local functions */ 242 static int get_typematic(keyboard_t *kbd); 243 static int setup_kbd_port(KBDC kbdc, int port, int intr); 244 static int get_kbd_echo(KBDC kbdc); 245 static int probe_keyboard(KBDC kbdc, int flags); 246 static int init_keyboard(KBDC kbdc, int *type, int flags); 247 static int write_kbd(KBDC kbdc, int command, int data); 248 static int get_kbd_id(KBDC kbdc); 249 static int typematic(int delay, int rate); 250 static int typematic_delay(int delay); 251 static int typematic_rate(int rate); 252 253 /* local variables */ 254 255 /* the initial key map, accent map and fkey strings */ 256 #ifdef ATKBD_DFLT_KEYMAP 257 #define KBD_DFLT_KEYMAP 258 #include "atkbdmap.h" 259 #endif 260 #include "kbdtables.h" 261 262 /* structures for the default keyboard */ 263 static keyboard_t default_kbd; 264 static atkbd_state_t default_kbd_state; 265 static keymap_t default_keymap; 266 static accentmap_t default_accentmap; 267 static fkeytab_t default_fkeytab[NUM_FKEYS]; 268 269 /* 270 * The back door to the keyboard driver! 271 * This function is called by the console driver, via the kbdio module, 272 * to tickle keyboard drivers when the low-level console is being initialized. 273 * Almost nothing in the kernel has been initialied yet. Try to probe 274 * keyboards if possible. 275 * NOTE: because of the way the low-level console is initialized, this routine 276 * may be called more than once!! 277 */ 278 static int 279 atkbd_configure(int flags) 280 { 281 keyboard_t *kbd; 282 int arg[2]; 283 int i; 284 285 /* 286 * Probe the keyboard controller, if not present or if the driver 287 * is disabled, unregister the keyboard if any. 288 */ 289 if (atkbdc_configure() != 0 || 290 resource_disabled("atkbd", ATKBD_DEFAULT)) { 291 i = kbd_find_keyboard(ATKBD_DRIVER_NAME, ATKBD_DEFAULT); 292 if (i >= 0) { 293 kbd = kbd_get_keyboard(i); 294 kbd_unregister(kbd); 295 kbd = NULL; /* huh? */ 296 } 297 return 0; 298 } 299 300 /* XXX: a kludge to obtain the device configuration flags */ 301 if (resource_int_value("atkbd", ATKBD_DEFAULT, "flags", &i) == 0) 302 flags |= i; 303 304 /* probe the default keyboard */ 305 arg[0] = -1; 306 arg[1] = -1; 307 kbd = NULL; 308 if (atkbd_probe(ATKBD_DEFAULT, arg, flags)) { 309 return 0; 310 } 311 if (atkbd_init(ATKBD_DEFAULT, &kbd, arg, flags)) { 312 return 0; 313 } 314 315 /* return the number of found keyboards */ 316 return 1; 317 } 318 319 /* low-level functions */ 320 321 /* detect a keyboard */ 322 static int 323 atkbd_probe(int unit, void *arg, int flags) 324 { 325 KBDC kbdc; 326 int *data = (int *)arg; /* data[0]: controller, data[1]: irq */ 327 328 329 if (unit == ATKBD_DEFAULT) { 330 if (KBD_IS_PROBED(&default_kbd)) { 331 return 0; 332 } 333 } 334 335 kbdc = atkbdc_open(data[0]); 336 if (kbdc == NULL) { 337 return ENXIO; 338 } 339 if (probe_keyboard(kbdc, flags)) { 340 if (flags & KB_CONF_FAIL_IF_NO_KBD) { 341 return ENXIO; 342 } 343 } 344 345 return 0; 346 } 347 348 /* reset and initialize the device */ 349 static int 350 atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags) 351 { 352 keyboard_t *kbd; 353 atkbd_state_t *state; 354 keymap_t *keymap; 355 accentmap_t *accmap; 356 fkeytab_t *fkeymap; 357 int fkeymap_size; 358 int delay[2]; 359 int *data = (int *)arg; /* data[0]: controller, data[1]: irq */ 360 361 /* XXX */ 362 if (unit == ATKBD_DEFAULT) { 363 *kbdp = kbd = &default_kbd; 364 if (KBD_IS_INITIALIZED(kbd) && KBD_IS_CONFIGURED(kbd)) { 365 return 0; 366 } 367 state = &default_kbd_state; 368 keymap = &default_keymap; 369 accmap = &default_accentmap; 370 fkeymap = default_fkeytab; 371 fkeymap_size = 372 sizeof(default_fkeytab)/sizeof(default_fkeytab[0]); 373 } else if (*kbdp == NULL) { 374 *kbdp = kbd = kmalloc(sizeof(*kbd), M_DEVBUF, M_WAITOK|M_ZERO); 375 state = kmalloc(sizeof(*state), M_DEVBUF, M_WAITOK|M_ZERO); 376 keymap = kmalloc(sizeof(key_map), M_DEVBUF, M_WAITOK); 377 accmap = kmalloc(sizeof(accent_map), M_DEVBUF, M_WAITOK); 378 fkeymap = kmalloc(sizeof(fkey_tab), M_DEVBUF, M_WAITOK); 379 fkeymap_size = sizeof(fkey_tab)/sizeof(fkey_tab[0]); 380 } else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) { 381 return 0; 382 } else { 383 kbd = *kbdp; 384 state = (atkbd_state_t *)kbd->kb_data; 385 bzero(state, sizeof(*state)); 386 keymap = kbd->kb_keymap; 387 accmap = kbd->kb_accentmap; 388 fkeymap = kbd->kb_fkeytab; 389 fkeymap_size = kbd->kb_fkeytab_size; 390 } 391 392 if (!KBD_IS_PROBED(kbd)) { 393 state->kbdc = atkbdc_open(data[0]); 394 if (state->kbdc == NULL) { 395 return ENXIO; 396 } 397 kbd_init_struct(kbd, ATKBD_DRIVER_NAME, KB_OTHER, unit, flags, 398 KB_PRI_ATKBD, 0, 0); 399 bcopy(&key_map, keymap, sizeof(key_map)); 400 bcopy(&accent_map, accmap, sizeof(accent_map)); 401 bcopy(fkey_tab, fkeymap, 402 imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab))); 403 kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size); 404 kbd->kb_data = (void *)state; 405 406 if (probe_keyboard(state->kbdc, flags)) { /* shouldn't happen */ 407 if (flags & KB_CONF_FAIL_IF_NO_KBD) { 408 return ENXIO; 409 } 410 } else { 411 KBD_FOUND_DEVICE(kbd); 412 } 413 atkbd_clear_state(kbd); 414 state->ks_mode = K_XLATE; 415 /* 416 * FIXME: set the initial value for lock keys in ks_state 417 * according to the BIOS data? 418 */ 419 KBD_PROBE_DONE(kbd); 420 } 421 if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) { 422 kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY; 423 if (KBD_HAS_DEVICE(kbd) 424 && init_keyboard(state->kbdc, &kbd->kb_type, kbd->kb_config) 425 && (kbd->kb_config & KB_CONF_FAIL_IF_NO_KBD)) { 426 return ENXIO; 427 } 428 atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state); 429 get_typematic(kbd); 430 delay[0] = kbd->kb_delay1; 431 delay[1] = kbd->kb_delay2; 432 atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay); 433 KBD_INIT_DONE(kbd); 434 } 435 if (!KBD_IS_CONFIGURED(kbd)) { 436 if (kbd_register(kbd) < 0) { 437 return ENXIO; 438 } 439 KBD_CONFIG_DONE(kbd); 440 } 441 442 return 0; 443 } 444 445 /* finish using this keyboard */ 446 static int 447 atkbd_term(keyboard_t *kbd) 448 { 449 kbd_unregister(kbd); 450 return 0; 451 } 452 453 /* keyboard interrupt routine */ 454 static int 455 atkbd_intr(keyboard_t *kbd, void *arg) 456 { 457 atkbd_state_t *state; 458 int delay[2]; 459 int c; 460 461 if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) { 462 /* let the callback function to process the input */ 463 (*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT, 464 kbd->kb_callback.kc_arg); 465 } else { 466 /* read and discard the input; no one is waiting for input */ 467 do { 468 c = atkbd_read_char(kbd, FALSE); 469 } while (c != NOKEY); 470 471 if (!KBD_HAS_DEVICE(kbd)) { 472 /* 473 * The keyboard was not detected before; 474 * it must have been reconnected! 475 */ 476 state = (atkbd_state_t *)kbd->kb_data; 477 init_keyboard(state->kbdc, &kbd->kb_type, 478 kbd->kb_config); 479 atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state); 480 get_typematic(kbd); 481 delay[0] = kbd->kb_delay1; 482 delay[1] = kbd->kb_delay2; 483 atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay); 484 KBD_FOUND_DEVICE(kbd); 485 } 486 } 487 488 return 0; 489 } 490 491 /* test the interface to the device */ 492 static int 493 atkbd_test_if(keyboard_t *kbd) 494 { 495 int error; 496 497 error = 0; 498 empty_both_buffers(((atkbd_state_t *)kbd->kb_data)->kbdc, 10); 499 crit_enter(); 500 if (!test_controller(((atkbd_state_t *)kbd->kb_data)->kbdc)) 501 error = EIO; 502 else if (test_kbd_port(((atkbd_state_t *)kbd->kb_data)->kbdc) != 0) 503 error = EIO; 504 crit_exit(); 505 506 return error; 507 } 508 509 /* 510 * Enable the access to the device; until this function is called, 511 * the client cannot read from the keyboard. 512 */ 513 static int 514 atkbd_enable(keyboard_t *kbd) 515 { 516 crit_enter(); 517 KBD_ACTIVATE(kbd); 518 crit_exit(); 519 return 0; 520 } 521 522 /* disallow the access to the device */ 523 static int 524 atkbd_disable(keyboard_t *kbd) 525 { 526 crit_enter(); 527 KBD_DEACTIVATE(kbd); 528 crit_exit(); 529 return 0; 530 } 531 532 /* read one byte from the keyboard if it's allowed */ 533 static int 534 atkbd_read(keyboard_t *kbd, int wait) 535 { 536 int c, ret; 537 538 if (wait) 539 c = read_kbd_data(((atkbd_state_t *)kbd->kb_data)->kbdc); 540 else 541 c = read_kbd_data_no_wait(((atkbd_state_t *)kbd->kb_data)->kbdc); 542 if (c != -1) 543 ++kbd->kb_count; 544 545 ret = (KBD_IS_ACTIVE(kbd) ? c : -1); 546 547 return ret; 548 } 549 550 /* check if data is waiting */ 551 static int 552 atkbd_check(keyboard_t *kbd) 553 { 554 int ret; 555 556 557 if (!KBD_IS_ACTIVE(kbd)) { 558 return FALSE; 559 } 560 ret = kbdc_data_ready(((atkbd_state_t *)kbd->kb_data)->kbdc); 561 562 return ret; 563 } 564 565 /* read char from the keyboard */ 566 static u_int 567 atkbd_read_char(keyboard_t *kbd, int wait) 568 { 569 atkbd_state_t *state; 570 u_int action; 571 int scancode; 572 int keycode; 573 574 state = (atkbd_state_t *)kbd->kb_data; 575 next_code: 576 /* do we have a composed char to return? */ 577 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) { 578 action = state->ks_composed_char; 579 state->ks_composed_char = 0; 580 if (action > UCHAR_MAX) { 581 return ERRKEY; 582 } 583 return action; 584 } 585 586 /* see if there is something in the keyboard port */ 587 if (wait) { 588 do { 589 scancode = read_kbd_data(state->kbdc); 590 } while (scancode == -1); 591 } else { 592 scancode = read_kbd_data_no_wait(state->kbdc); 593 if (scancode == -1) { 594 return NOKEY; 595 } 596 } 597 ++kbd->kb_count; 598 599 #if KBDIO_DEBUG >= 10 600 kprintf("atkbd_read_char(): scancode:0x%x\n", scancode); 601 #endif 602 603 /* return the byte as is for the K_RAW mode */ 604 if (state->ks_mode == K_RAW) { 605 return scancode; 606 } 607 608 /* translate the scan code into a keycode */ 609 keycode = scancode & 0x7F; 610 switch (state->ks_prefix) { 611 case 0x00: /* normal scancode */ 612 switch(scancode) { 613 case 0xB8: /* left alt (compose key) released */ 614 if (state->ks_flags & COMPOSE) { 615 state->ks_flags &= ~COMPOSE; 616 if (state->ks_composed_char > UCHAR_MAX) 617 state->ks_composed_char = 0; 618 } 619 break; 620 case 0x38: /* left alt (compose key) pressed */ 621 if (!(state->ks_flags & COMPOSE)) { 622 state->ks_flags |= COMPOSE; 623 state->ks_composed_char = 0; 624 } 625 break; 626 case 0xE0: 627 case 0xE1: 628 state->ks_prefix = scancode; 629 goto next_code; 630 } 631 break; 632 case 0xE0: /* 0xE0 prefix */ 633 state->ks_prefix = 0; 634 switch (keycode) { 635 case 0x1C: /* right enter key */ 636 keycode = 0x59; 637 break; 638 case 0x1D: /* right ctrl key */ 639 keycode = 0x5A; 640 break; 641 case 0x35: /* keypad divide key */ 642 keycode = 0x5B; 643 break; 644 case 0x37: /* print scrn key */ 645 keycode = 0x5C; 646 break; 647 case 0x38: /* right alt key (alt gr) */ 648 keycode = 0x5D; 649 break; 650 case 0x46: /* ctrl-pause/break on AT 101 (see below) */ 651 keycode = 0x68; 652 break; 653 case 0x47: /* grey home key */ 654 keycode = 0x5E; 655 break; 656 case 0x48: /* grey up arrow key */ 657 keycode = 0x5F; 658 break; 659 case 0x49: /* grey page up key */ 660 keycode = 0x60; 661 break; 662 case 0x4B: /* grey left arrow key */ 663 keycode = 0x61; 664 break; 665 case 0x4D: /* grey right arrow key */ 666 keycode = 0x62; 667 break; 668 case 0x4F: /* grey end key */ 669 keycode = 0x63; 670 break; 671 case 0x50: /* grey down arrow key */ 672 keycode = 0x64; 673 break; 674 case 0x51: /* grey page down key */ 675 keycode = 0x65; 676 break; 677 case 0x52: /* grey insert key */ 678 keycode = 0x66; 679 break; 680 case 0x53: /* grey delete key */ 681 keycode = 0x67; 682 break; 683 /* the following 3 are only used on the MS "Natural" keyboard */ 684 case 0x5b: /* left Window key */ 685 keycode = 0x69; 686 break; 687 case 0x5c: /* right Window key */ 688 keycode = 0x6a; 689 break; 690 case 0x5d: /* menu key */ 691 keycode = 0x6b; 692 break; 693 default: /* ignore everything else */ 694 goto next_code; 695 } 696 break; 697 case 0xE1: /* 0xE1 prefix */ 698 /* 699 * The pause/break key on the 101 keyboard produces: 700 * E1-1D-45 E1-9D-C5 701 * Ctrl-pause/break produces: 702 * E0-46 E0-C6 (See above.) 703 */ 704 state->ks_prefix = 0; 705 if (keycode == 0x1D) 706 state->ks_prefix = 0x1D; 707 goto next_code; 708 /* NOT REACHED */ 709 case 0x1D: /* pause / break */ 710 state->ks_prefix = 0; 711 if (keycode != 0x45) 712 goto next_code; 713 keycode = 0x68; 714 break; 715 } 716 717 if (kbd->kb_type == KB_84) { 718 switch (keycode) { 719 case 0x37: /* *(numpad)/print screen */ 720 if (state->ks_flags & SHIFTS) 721 keycode = 0x5c; /* print screen */ 722 break; 723 case 0x45: /* num lock/pause */ 724 if (state->ks_flags & CTLS) 725 keycode = 0x68; /* pause */ 726 break; 727 case 0x46: /* scroll lock/break */ 728 if (state->ks_flags & CTLS) 729 keycode = 0x6c; /* break */ 730 break; 731 } 732 } else if (kbd->kb_type == KB_101) { 733 switch (keycode) { 734 case 0x5c: /* print screen */ 735 if (state->ks_flags & ALTS) 736 keycode = 0x54; /* sysrq */ 737 break; 738 case 0x68: /* pause/break */ 739 if (state->ks_flags & CTLS) 740 keycode = 0x6c; /* break */ 741 break; 742 } 743 } 744 745 /* return the key code in the K_CODE mode */ 746 if (state->ks_mode == K_CODE) { 747 return (keycode | (scancode & 0x80)); 748 } 749 750 /* compose a character code */ 751 if (state->ks_flags & COMPOSE) { 752 switch (keycode | (scancode & 0x80)) { 753 /* key pressed, process it */ 754 case 0x47: case 0x48: case 0x49: /* keypad 7,8,9 */ 755 state->ks_composed_char *= 10; 756 state->ks_composed_char += keycode - 0x40; 757 if (state->ks_composed_char > UCHAR_MAX) 758 return ERRKEY; 759 goto next_code; 760 case 0x4B: case 0x4C: case 0x4D: /* keypad 4,5,6 */ 761 state->ks_composed_char *= 10; 762 state->ks_composed_char += keycode - 0x47; 763 if (state->ks_composed_char > UCHAR_MAX) 764 return ERRKEY; 765 goto next_code; 766 case 0x4F: case 0x50: case 0x51: /* keypad 1,2,3 */ 767 state->ks_composed_char *= 10; 768 state->ks_composed_char += keycode - 0x4E; 769 if (state->ks_composed_char > UCHAR_MAX) 770 return ERRKEY; 771 goto next_code; 772 case 0x52: /* keypad 0 */ 773 state->ks_composed_char *= 10; 774 if (state->ks_composed_char > UCHAR_MAX) 775 return ERRKEY; 776 goto next_code; 777 778 /* key released, no interest here */ 779 case 0xC7: case 0xC8: case 0xC9: /* keypad 7,8,9 */ 780 case 0xCB: case 0xCC: case 0xCD: /* keypad 4,5,6 */ 781 case 0xCF: case 0xD0: case 0xD1: /* keypad 1,2,3 */ 782 case 0xD2: /* keypad 0 */ 783 goto next_code; 784 785 case 0x38: /* left alt key */ 786 break; 787 788 default: 789 if (state->ks_composed_char > 0) { 790 state->ks_flags &= ~COMPOSE; 791 state->ks_composed_char = 0; 792 return ERRKEY; 793 } 794 break; 795 } 796 } 797 798 /* keycode to key action */ 799 action = genkbd_keyaction(kbd, keycode, scancode & 0x80, 800 &state->ks_state, &state->ks_accents); 801 if (action == NOKEY) { 802 goto next_code; 803 } else { 804 return action; 805 } 806 } 807 808 /* check if char is waiting */ 809 static int 810 atkbd_check_char(keyboard_t *kbd) 811 { 812 atkbd_state_t *state; 813 int ret; 814 815 if (!KBD_IS_ACTIVE(kbd)) { 816 return FALSE; 817 } 818 state = (atkbd_state_t *)kbd->kb_data; 819 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) { 820 return TRUE; 821 } 822 ret = kbdc_data_ready(state->kbdc); 823 return ret; 824 } 825 826 /* some useful control functions */ 827 static int 828 atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 829 { 830 /* trasnlate LED_XXX bits into the device specific bits */ 831 static u_char ledmap[8] = { 832 0, 4, 2, 6, 1, 5, 3, 7, 833 }; 834 atkbd_state_t *state = kbd->kb_data; 835 int error; 836 int i; 837 838 crit_enter(); 839 840 switch (cmd) { 841 842 case KDGKBMODE: /* get keyboard mode */ 843 *(int *)arg = state->ks_mode; 844 break; 845 case KDSKBMODE: /* set keyboard mode */ 846 switch (*(int *)arg) { 847 case K_XLATE: 848 if (state->ks_mode != K_XLATE) { 849 /* make lock key state and LED state match */ 850 state->ks_state &= ~LOCK_MASK; 851 state->ks_state |= KBD_LED_VAL(kbd); 852 } 853 /* FALL THROUGH */ 854 case K_RAW: 855 case K_CODE: 856 if (state->ks_mode != *(int *)arg) { 857 atkbd_clear_state(kbd); 858 state->ks_mode = *(int *)arg; 859 } 860 break; 861 default: 862 crit_exit(); 863 return EINVAL; 864 } 865 break; 866 867 case KDGETLED: /* get keyboard LED */ 868 *(int *)arg = KBD_LED_VAL(kbd); 869 break; 870 case KDSETLED: /* set keyboard LED */ 871 /* NOTE: lock key state in ks_state won't be changed */ 872 if (*(int *)arg & ~LOCK_MASK) { 873 crit_exit(); 874 return EINVAL; 875 } 876 i = *(int *)arg; 877 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */ 878 if (state->ks_mode == K_XLATE && 879 kbd->kb_keymap->n_keys > ALTGR_OFFSET) { 880 if (i & ALKED) 881 i |= CLKED; 882 else 883 i &= ~CLKED; 884 } 885 if (KBD_HAS_DEVICE(kbd)) { 886 error = write_kbd(state->kbdc, KBDC_SET_LEDS, 887 ledmap[i & LED_MASK]); 888 if (error) { 889 crit_exit(); 890 return error; 891 } 892 } 893 KBD_LED_VAL(kbd) = *(int *)arg; 894 break; 895 896 case KDGKBSTATE: /* get lock key state */ 897 *(int *)arg = state->ks_state & LOCK_MASK; 898 break; 899 case KDSKBSTATE: /* set lock key state */ 900 if (*(int *)arg & ~LOCK_MASK) { 901 crit_exit(); 902 return EINVAL; 903 } 904 state->ks_state &= ~LOCK_MASK; 905 state->ks_state |= *(int *)arg; 906 crit_exit(); 907 /* set LEDs and quit */ 908 return atkbd_ioctl(kbd, KDSETLED, arg); 909 910 case KDSETREPEAT: /* set keyboard repeat rate (new interface) */ 911 crit_exit(); 912 if (!KBD_HAS_DEVICE(kbd)) { 913 return 0; 914 } 915 i = typematic(((int *)arg)[0], ((int *)arg)[1]); 916 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, i); 917 if (error == 0) { 918 kbd->kb_delay1 = typematic_delay(i); 919 kbd->kb_delay2 = typematic_rate(i); 920 } 921 return error; 922 923 case KDSETRAD: /* set keyboard repeat rate (old interface) */ 924 crit_exit(); 925 if (!KBD_HAS_DEVICE(kbd)) { 926 return 0; 927 } 928 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, *(int *)arg); 929 if (error == 0) { 930 kbd->kb_delay1 = typematic_delay(*(int *)arg); 931 kbd->kb_delay2 = typematic_rate(*(int *)arg); 932 } 933 return error; 934 935 case PIO_KEYMAP: /* set keyboard translation table */ 936 case PIO_KEYMAPENT: /* set keyboard translation table entry */ 937 case PIO_DEADKEYMAP: /* set accent key translation table */ 938 state->ks_accents = 0; 939 /* FALL THROUGH */ 940 default: 941 crit_exit(); 942 return genkbd_commonioctl(kbd, cmd, arg); 943 } 944 945 crit_exit(); 946 return 0; 947 } 948 949 /* lock the access to the keyboard */ 950 static int 951 atkbd_lock(keyboard_t *kbd, int lock) 952 { 953 return kbdc_lock(((atkbd_state_t *)kbd->kb_data)->kbdc, lock); 954 } 955 956 /* clear the internal state of the keyboard */ 957 static void 958 atkbd_clear_state(keyboard_t *kbd) 959 { 960 atkbd_state_t *state; 961 962 state = (atkbd_state_t *)kbd->kb_data; 963 state->ks_flags = 0; 964 state->ks_polling = 0; 965 state->ks_state &= LOCK_MASK; /* preserve locking key state */ 966 state->ks_accents = 0; 967 state->ks_composed_char = 0; 968 #if 0 969 state->ks_prefix = 0; /* XXX */ 970 #endif 971 } 972 973 /* save the internal state */ 974 static int 975 atkbd_get_state(keyboard_t *kbd, void *buf, size_t len) 976 { 977 if (len == 0) 978 return sizeof(atkbd_state_t); 979 if (len < sizeof(atkbd_state_t)) 980 return -1; 981 982 bcopy(kbd->kb_data, buf, sizeof(atkbd_state_t)); 983 return 0; 984 } 985 986 /* set the internal state */ 987 static int 988 atkbd_set_state(keyboard_t *kbd, void *buf, size_t len) 989 { 990 if (len < sizeof(atkbd_state_t)) 991 return ENOMEM; 992 if (((atkbd_state_t *)kbd->kb_data)->kbdc 993 != ((atkbd_state_t *)buf)->kbdc) 994 return ENOMEM; 995 bcopy(buf, kbd->kb_data, sizeof(atkbd_state_t)); 996 return 0; 997 } 998 999 static int 1000 atkbd_poll(keyboard_t *kbd, int on) 1001 { 1002 atkbd_state_t *state; 1003 1004 state = (atkbd_state_t *)kbd->kb_data; 1005 crit_enter(); 1006 if (on) 1007 state->ks_polling = 1; 1008 else 1009 state->ks_polling = 0; 1010 crit_exit(); 1011 return 0; 1012 } 1013 1014 /* local functions */ 1015 1016 static int 1017 get_typematic(keyboard_t *kbd) 1018 { 1019 #ifdef __i386__ 1020 /* 1021 * Only some systems allow us to retrieve the keyboard repeat 1022 * rate previously set via the BIOS... 1023 */ 1024 struct vm86frame vmf; 1025 u_int32_t p; 1026 1027 bzero(&vmf, sizeof(vmf)); 1028 vmf.vmf_ax = 0xc000; 1029 vm86_intcall(0x15, &vmf); 1030 if ((vmf.vmf_eflags & PSL_C) || vmf.vmf_ah) 1031 return ENODEV; 1032 p = BIOS_PADDRTOVADDR(((u_int32_t)vmf.vmf_es << 4) + vmf.vmf_bx); 1033 if ((readb(p + 6) & 0x40) == 0) /* int 16, function 0x09 supported? */ 1034 return ENODEV; 1035 vmf.vmf_ax = 0x0900; 1036 vm86_intcall(0x16, &vmf); 1037 if ((vmf.vmf_al & 0x08) == 0) /* int 16, function 0x0306 supported? */ 1038 return ENODEV; 1039 vmf.vmf_ax = 0x0306; 1040 vm86_intcall(0x16, &vmf); 1041 kbd->kb_delay1 = typematic_delay(vmf.vmf_bh << 5); 1042 kbd->kb_delay2 = typematic_rate(vmf.vmf_bl); 1043 return 0; 1044 #else 1045 return ENODEV; 1046 #endif /* __i386__ */ 1047 } 1048 1049 static int 1050 setup_kbd_port(KBDC kbdc, int port, int intr) 1051 { 1052 if (!set_controller_command_byte(kbdc, 1053 KBD_KBD_CONTROL_BITS, 1054 ((port) ? KBD_ENABLE_KBD_PORT : KBD_DISABLE_KBD_PORT) 1055 | ((intr) ? KBD_ENABLE_KBD_INT : KBD_DISABLE_KBD_INT))) 1056 return 1; 1057 return 0; 1058 } 1059 1060 static int 1061 get_kbd_echo(KBDC kbdc) 1062 { 1063 /* enable the keyboard port, but disable the keyboard intr. */ 1064 if (setup_kbd_port(kbdc, TRUE, FALSE)) 1065 /* CONTROLLER ERROR: there is very little we can do... */ 1066 return ENXIO; 1067 1068 /* see if something is present */ 1069 write_kbd_command(kbdc, KBDC_ECHO); 1070 if (read_kbd_data(kbdc) != KBD_ECHO) { 1071 empty_both_buffers(kbdc, 10); 1072 test_controller(kbdc); 1073 test_kbd_port(kbdc); 1074 return ENXIO; 1075 } 1076 1077 /* enable the keyboard port and intr. */ 1078 if (setup_kbd_port(kbdc, TRUE, TRUE)) { 1079 /* 1080 * CONTROLLER ERROR 1081 * This is serious; the keyboard intr is left disabled! 1082 */ 1083 return ENXIO; 1084 } 1085 1086 return 0; 1087 } 1088 1089 static int 1090 probe_keyboard(KBDC kbdc, int flags) 1091 { 1092 /* 1093 * Don't try to print anything in this function. The low-level 1094 * console may not have been initialized yet... 1095 */ 1096 int err; 1097 int c; 1098 int m; 1099 1100 if (!kbdc_lock(kbdc, TRUE)) { 1101 /* driver error? */ 1102 return ENXIO; 1103 } 1104 1105 /* temporarily block data transmission from the keyboard */ 1106 write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT); 1107 1108 /* flush any noise in the buffer */ 1109 empty_both_buffers(kbdc, 100); 1110 1111 /* save the current keyboard controller command byte */ 1112 m = kbdc_get_device_mask(kbdc) & ~KBD_KBD_CONTROL_BITS; 1113 c = get_controller_command_byte(kbdc); 1114 if (c == -1) { 1115 /* CONTROLLER ERROR */ 1116 kbdc_set_device_mask(kbdc, m); 1117 kbdc_lock(kbdc, FALSE); 1118 return ENXIO; 1119 } 1120 1121 /* 1122 * The keyboard may have been screwed up by the boot block. 1123 * We may just be able to recover from error by testing the controller 1124 * and the keyboard port. The controller command byte needs to be 1125 * saved before this recovery operation, as some controllers seem 1126 * to set the command byte to particular values. 1127 */ 1128 test_controller(kbdc); 1129 test_kbd_port(kbdc); 1130 1131 err = get_kbd_echo(kbdc); 1132 1133 /* 1134 * Even if the keyboard doesn't seem to be present (err != 0), 1135 * we shall enable the keyboard port and interrupt so that 1136 * the driver will be operable when the keyboard is attached 1137 * to the system later. It is NOT recommended to hot-plug 1138 * the AT keyboard, but many people do so... 1139 */ 1140 kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS); 1141 setup_kbd_port(kbdc, TRUE, TRUE); 1142 #if 0 1143 if (err == 0) { 1144 kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS); 1145 } else { 1146 /* try to restore the command byte as before */ 1147 set_controller_command_byte(kbdc, 0xff, c); 1148 kbdc_set_device_mask(kbdc, m); 1149 } 1150 #endif 1151 1152 kbdc_lock(kbdc, FALSE); 1153 return err; 1154 } 1155 1156 static int 1157 init_keyboard(KBDC kbdc, int *type, int flags) 1158 { 1159 int codeset; 1160 int id; 1161 int c; 1162 1163 if (!kbdc_lock(kbdc, TRUE)) { 1164 /* driver error? */ 1165 return EIO; 1166 } 1167 1168 /* temporarily block data transmission from the keyboard */ 1169 write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT); 1170 1171 /* save the current controller command byte */ 1172 empty_both_buffers(kbdc, 200); 1173 c = get_controller_command_byte(kbdc); 1174 if (c == -1) { 1175 /* CONTROLLER ERROR */ 1176 kbdc_lock(kbdc, FALSE); 1177 kprintf("atkbd: unable to get the current command byte value.\n"); 1178 return EIO; 1179 } 1180 if (bootverbose) 1181 kprintf("atkbd: the current kbd controller command byte %04x\n", 1182 c); 1183 #if 0 1184 /* override the keyboard lock switch */ 1185 c |= KBD_OVERRIDE_KBD_LOCK; 1186 #endif 1187 1188 /* enable the keyboard port, but disable the keyboard intr. */ 1189 if (setup_kbd_port(kbdc, TRUE, FALSE)) { 1190 /* CONTROLLER ERROR: there is very little we can do... */ 1191 kprintf("atkbd: unable to set the command byte.\n"); 1192 kbdc_lock(kbdc, FALSE); 1193 return EIO; 1194 } 1195 1196 /* 1197 * Check if we have an XT keyboard before we attempt to reset it. 1198 * The procedure assumes that the keyboard and the controller have 1199 * been set up properly by BIOS and have not been messed up 1200 * during the boot process. 1201 */ 1202 codeset = -1; 1203 if (flags & KB_CONF_ALT_SCANCODESET) 1204 /* the user says there is a XT keyboard */ 1205 codeset = 1; 1206 #ifdef KBD_DETECT_XT_KEYBOARD 1207 else if ((c & KBD_TRANSLATION) == 0) { 1208 /* SET_SCANCODE_SET is not always supported; ignore error */ 1209 if (send_kbd_command_and_data(kbdc, KBDC_SET_SCANCODE_SET, 0) 1210 == KBD_ACK) 1211 codeset = read_kbd_data(kbdc); 1212 } 1213 if (bootverbose) 1214 kprintf("atkbd: scancode set %d\n", codeset); 1215 #endif /* KBD_DETECT_XT_KEYBOARD */ 1216 1217 *type = KB_OTHER; 1218 id = get_kbd_id(kbdc); 1219 switch(id) { 1220 case 0x41ab: /* 101/102/... Enhanced */ 1221 case 0x83ab: /* ditto */ 1222 case 0x54ab: /* SpaceSaver */ 1223 case 0x84ab: /* ditto */ 1224 #if 0 1225 case 0x90ab: /* 'G' */ 1226 case 0x91ab: /* 'P' */ 1227 case 0x92ab: /* 'A' */ 1228 #endif 1229 *type = KB_101; 1230 break; 1231 case -1: /* AT 84 keyboard doesn't return ID */ 1232 *type = KB_84; 1233 break; 1234 default: 1235 break; 1236 } 1237 if (bootverbose) 1238 kprintf("atkbd: keyboard ID 0x%x (%d)\n", id, *type); 1239 1240 /* reset keyboard hardware */ 1241 if (!(flags & KB_CONF_NO_RESET) && !reset_kbd(kbdc)) { 1242 /* 1243 * KEYBOARD ERROR 1244 * Keyboard reset may fail either because the keyboard 1245 * doen't exist, or because the keyboard doesn't pass 1246 * the self-test, or the keyboard controller on the 1247 * motherboard and the keyboard somehow fail to shake hands. 1248 * It is just possible, particularly in the last case, 1249 * that the keyoard controller may be left in a hung state. 1250 * test_controller() and test_kbd_port() appear to bring 1251 * the keyboard controller back (I don't know why and how, 1252 * though.) 1253 */ 1254 empty_both_buffers(kbdc, 10); 1255 test_controller(kbdc); 1256 test_kbd_port(kbdc); 1257 /* 1258 * We could disable the keyboard port and interrupt... but, 1259 * the keyboard may still exist (see above). 1260 */ 1261 set_controller_command_byte(kbdc, 0xff, c); 1262 kbdc_lock(kbdc, FALSE); 1263 if (bootverbose) 1264 kprintf("atkbd: failed to reset the keyboard.\n"); 1265 return EIO; 1266 } 1267 1268 /* 1269 * Allow us to set the XT_KEYBD flag in UserConfig so that keyboards 1270 * such as those on the IBM ThinkPad laptop computers can be used 1271 * with the standard console driver. 1272 */ 1273 if (codeset == 1) { 1274 if (send_kbd_command_and_data(kbdc, 1275 KBDC_SET_SCANCODE_SET, codeset) == KBD_ACK) { 1276 /* XT kbd doesn't need scan code translation */ 1277 c &= ~KBD_TRANSLATION; 1278 } else { 1279 /* 1280 * KEYBOARD ERROR 1281 * The XT kbd isn't usable unless the proper scan 1282 * code set is selected. 1283 */ 1284 set_controller_command_byte(kbdc, 0xff, c); 1285 kbdc_lock(kbdc, FALSE); 1286 kprintf("atkbd: unable to set the XT keyboard mode.\n"); 1287 return EIO; 1288 } 1289 } 1290 1291 /* enable the keyboard port and intr. */ 1292 if (!set_controller_command_byte(kbdc, 1293 KBD_KBD_CONTROL_BITS | KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK, 1294 (c & (KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK)) 1295 | KBD_ENABLE_KBD_PORT | KBD_ENABLE_KBD_INT)) { 1296 /* 1297 * CONTROLLER ERROR 1298 * This is serious; we are left with the disabled 1299 * keyboard intr. 1300 */ 1301 set_controller_command_byte(kbdc, 0xff, c); 1302 kbdc_lock(kbdc, FALSE); 1303 kprintf("atkbd: unable to enable the keyboard port and intr.\n"); 1304 return EIO; 1305 } 1306 1307 kbdc_lock(kbdc, FALSE); 1308 return 0; 1309 } 1310 1311 static int 1312 write_kbd(KBDC kbdc, int command, int data) 1313 { 1314 /* prevent the timeout routine from polling the keyboard */ 1315 if (!kbdc_lock(kbdc, TRUE)) 1316 return EBUSY; 1317 1318 /* disable the keyboard and mouse interrupt */ 1319 crit_enter(); 1320 #if 0 1321 c = get_controller_command_byte(kbdc); 1322 if ((c == -1) 1323 || !set_controller_command_byte(kbdc, 1324 kbdc_get_device_mask(kbdc), 1325 KBD_DISABLE_KBD_PORT | KBD_DISABLE_KBD_INT 1326 | KBD_DISABLE_AUX_PORT | KBD_DISABLE_AUX_INT)) { 1327 /* CONTROLLER ERROR */ 1328 kbdc_lock(kbdc, FALSE); 1329 crit_exit(); 1330 return EIO; 1331 } 1332 /* 1333 * Now that the keyboard controller is told not to generate 1334 * the keyboard and mouse interrupts, call `splx()' to allow 1335 * the other tty interrupts. The clock interrupt may also occur, 1336 * but the timeout routine (`scrn_timer()') will be blocked 1337 * by the lock flag set via `kbdc_lock()' 1338 */ 1339 crit_exit(); 1340 #endif 1341 1342 if (send_kbd_command_and_data(kbdc, command, data) != KBD_ACK) 1343 send_kbd_command(kbdc, KBDC_ENABLE_KBD); 1344 1345 #if 0 1346 /* restore the interrupts */ 1347 if (!set_controller_command_byte(kbdc, 1348 kbdc_get_device_mask(kbdc), 1349 c & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS))) { 1350 /* CONTROLLER ERROR */ 1351 } 1352 #else 1353 crit_exit(); 1354 #endif 1355 kbdc_lock(kbdc, FALSE); 1356 1357 return 0; 1358 } 1359 1360 static int 1361 get_kbd_id(KBDC kbdc) 1362 { 1363 int id1, id2; 1364 1365 empty_both_buffers(kbdc, 10); 1366 id1 = id2 = -1; 1367 if (send_kbd_command(kbdc, KBDC_SEND_DEV_ID) != KBD_ACK) 1368 return -1; 1369 1370 DELAY(10000); /* 10 msec delay */ 1371 id1 = read_kbd_data(kbdc); 1372 if (id1 != -1) 1373 id2 = read_kbd_data(kbdc); 1374 1375 if ((id1 == -1) || (id2 == -1)) { 1376 empty_both_buffers(kbdc, 10); 1377 test_controller(kbdc); 1378 test_kbd_port(kbdc); 1379 return -1; 1380 } 1381 return ((id2 << 8) | id1); 1382 } 1383 1384 static int delays[] = { 250, 500, 750, 1000 }; 1385 static int rates[] = { 34, 38, 42, 46, 50, 55, 59, 63, 1386 68, 76, 84, 92, 100, 110, 118, 126, 1387 136, 152, 168, 184, 200, 220, 236, 252, 1388 272, 304, 336, 368, 400, 440, 472, 504 }; 1389 1390 static int 1391 typematic_delay(int i) 1392 { 1393 return delays[(i >> 5) & 3]; 1394 } 1395 1396 static int 1397 typematic_rate(int i) 1398 { 1399 return rates[i & 0x1f]; 1400 } 1401 1402 static int 1403 typematic(int delay, int rate) 1404 { 1405 int value; 1406 int i; 1407 1408 for (i = sizeof(delays)/sizeof(delays[0]) - 1; i > 0; --i) { 1409 if (delay >= delays[i]) 1410 break; 1411 } 1412 value = i << 5; 1413 for (i = sizeof(rates)/sizeof(rates[0]) - 1; i > 0; --i) { 1414 if (rate >= rates[i]) 1415 break; 1416 } 1417 value |= i; 1418 return value; 1419 } 1420