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 * $FreeBSD: src/sys/dev/kbd/atkbd.c,v 1.25.2.4 2002/04/08 19:21:38 asmodai Exp $ 27 * $DragonFly: src/sys/dev/misc/kbd/atkbd.c,v 1.8 2005/05/07 17:38:33 swildner Exp $ 28 */ 29 30 #include "opt_kbd.h" 31 #include "opt_atkbd.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/proc.h> 38 #include <sys/malloc.h> 39 40 #include <machine/bus.h> 41 #include <machine/resource.h> 42 43 #ifdef __i386__ 44 #include <machine/md_var.h> 45 #include <machine/psl.h> 46 #include <machine/vm86.h> 47 #include <machine/pc/bios.h> 48 49 #include <vm/vm.h> 50 #include <vm/pmap.h> 51 #endif /* __i386__ */ 52 53 #include <sys/kbio.h> 54 #include "kbdreg.h" 55 #include "atkbdreg.h" 56 #include "atkbdcreg.h" 57 58 #include <bus/isa/isareg.h> 59 60 static timeout_t atkbd_timeout; 61 62 int 63 atkbd_probe_unit(int unit, int ctlr, int irq, int flags) 64 { 65 keyboard_switch_t *sw; 66 int args[2]; 67 int error; 68 69 sw = kbd_get_switch(ATKBD_DRIVER_NAME); 70 if (sw == NULL) 71 return ENXIO; 72 73 args[0] = ctlr; 74 args[1] = irq; 75 error = (*sw->probe)(unit, args, flags); 76 if (error) 77 return error; 78 return 0; 79 } 80 81 int 82 atkbd_attach_unit(int unit, keyboard_t **kbd, int ctlr, int irq, int flags) 83 { 84 keyboard_switch_t *sw; 85 int args[2]; 86 int error; 87 88 sw = kbd_get_switch(ATKBD_DRIVER_NAME); 89 if (sw == NULL) 90 return ENXIO; 91 92 /* reset, initialize and enable the device */ 93 args[0] = ctlr; 94 args[1] = irq; 95 *kbd = NULL; 96 error = (*sw->probe)(unit, args, flags); 97 if (error) 98 return error; 99 error = (*sw->init)(unit, kbd, args, flags); 100 if (error) 101 return error; 102 (*sw->enable)(*kbd); 103 104 #ifdef KBD_INSTALL_CDEV 105 /* attach a virtual keyboard cdev */ 106 error = kbd_attach(*kbd); 107 if (error) 108 return error; 109 #endif 110 111 /* 112 * This is a kludge to compensate for lost keyboard interrupts. 113 * A similar code used to be in syscons. See below. XXX 114 */ 115 atkbd_timeout(*kbd); 116 117 if (bootverbose) 118 (*sw->diag)(*kbd, bootverbose); 119 return 0; 120 } 121 122 static void 123 atkbd_timeout(void *arg) 124 { 125 keyboard_t *kbd; 126 int s; 127 128 /* 129 * The original text of the following comments are extracted 130 * from syscons.c (1.287) 131 * 132 * With release 2.1 of the Xaccel server, the keyboard is left 133 * hanging pretty often. Apparently an interrupt from the 134 * keyboard is lost, and I don't know why (yet). 135 * This ugly hack calls the low-level interrupt routine if input 136 * is ready for the keyboard and conveniently hides the problem. XXX 137 * 138 * Try removing anything stuck in the keyboard controller; whether 139 * it's a keyboard scan code or mouse data. The low-level 140 * interrupt routine doesn't read the mouse data directly, 141 * but the keyboard controller driver will, as a side effect. 142 */ 143 /* 144 * And here is bde's original comment about this: 145 * 146 * This is necessary to handle edge triggered interrupts - if we 147 * returned when our IRQ is high due to unserviced input, then there 148 * would be no more keyboard IRQs until the keyboard is reset by 149 * external powers. 150 * 151 * The keyboard apparently unwedges the irq in most cases. 152 */ 153 s = spltty(); 154 kbd = (keyboard_t *)arg; 155 if ((*kbdsw[kbd->kb_index]->lock)(kbd, TRUE)) { 156 /* 157 * We have seen the lock flag is not set. Let's reset 158 * the flag early, otherwise the LED update routine fails 159 * which may want the lock during the interrupt routine. 160 */ 161 (*kbdsw[kbd->kb_index]->lock)(kbd, FALSE); 162 if ((*kbdsw[kbd->kb_index]->check_char)(kbd)) 163 (*kbdsw[kbd->kb_index]->intr)(kbd, NULL); 164 } 165 splx(s); 166 callout_reset(&kbd->kb_atkbd_timeout_ch, hz / 10, atkbd_timeout, arg); 167 } 168 169 /* LOW-LEVEL */ 170 171 #include <machine/limits.h> 172 #include <machine/clock.h> 173 174 #define ATKBD_DEFAULT 0 175 176 typedef struct atkbd_state { 177 KBDC kbdc; /* keyboard controller */ 178 int ks_mode; /* input mode (K_XLATE,K_RAW,K_CODE) */ 179 int ks_flags; /* flags */ 180 #define COMPOSE (1 << 0) 181 int ks_polling; 182 int ks_state; /* shift/lock key state */ 183 int ks_accents; /* accent key index (> 0) */ 184 u_int ks_composed_char; /* composed char code (> 0) */ 185 u_char ks_prefix; /* AT scan code prefix */ 186 } atkbd_state_t; 187 188 /* keyboard driver declaration */ 189 static int atkbd_configure(int flags); 190 static kbd_probe_t atkbd_probe; 191 static kbd_init_t atkbd_init; 192 static kbd_term_t atkbd_term; 193 static kbd_intr_t atkbd_intr; 194 static kbd_test_if_t atkbd_test_if; 195 static kbd_enable_t atkbd_enable; 196 static kbd_disable_t atkbd_disable; 197 static kbd_read_t atkbd_read; 198 static kbd_check_t atkbd_check; 199 static kbd_read_char_t atkbd_read_char; 200 static kbd_check_char_t atkbd_check_char; 201 static kbd_ioctl_t atkbd_ioctl; 202 static kbd_lock_t atkbd_lock; 203 static kbd_clear_state_t atkbd_clear_state; 204 static kbd_get_state_t atkbd_get_state; 205 static kbd_set_state_t atkbd_set_state; 206 static kbd_poll_mode_t atkbd_poll; 207 208 keyboard_switch_t atkbdsw = { 209 atkbd_probe, 210 atkbd_init, 211 atkbd_term, 212 atkbd_intr, 213 atkbd_test_if, 214 atkbd_enable, 215 atkbd_disable, 216 atkbd_read, 217 atkbd_check, 218 atkbd_read_char, 219 atkbd_check_char, 220 atkbd_ioctl, 221 atkbd_lock, 222 atkbd_clear_state, 223 atkbd_get_state, 224 atkbd_set_state, 225 genkbd_get_fkeystr, 226 atkbd_poll, 227 genkbd_diag, 228 }; 229 230 KEYBOARD_DRIVER(atkbd, atkbdsw, atkbd_configure); 231 232 /* local functions */ 233 static int get_typematic(keyboard_t *kbd); 234 static int setup_kbd_port(KBDC kbdc, int port, int intr); 235 static int get_kbd_echo(KBDC kbdc); 236 static int probe_keyboard(KBDC kbdc, int flags); 237 static int init_keyboard(KBDC kbdc, int *type, int flags); 238 static int write_kbd(KBDC kbdc, int command, int data); 239 static int get_kbd_id(KBDC kbdc); 240 static int typematic(int delay, int rate); 241 static int typematic_delay(int delay); 242 static int typematic_rate(int rate); 243 244 /* local variables */ 245 246 /* the initial key map, accent map and fkey strings */ 247 #ifdef ATKBD_DFLT_KEYMAP 248 #define KBD_DFLT_KEYMAP 249 #include "atkbdmap.h" 250 #endif 251 #include "kbdtables.h" 252 253 /* structures for the default keyboard */ 254 static keyboard_t default_kbd; 255 static atkbd_state_t default_kbd_state; 256 static keymap_t default_keymap; 257 static accentmap_t default_accentmap; 258 static fkeytab_t default_fkeytab[NUM_FKEYS]; 259 260 /* 261 * The back door to the keyboard driver! 262 * This function is called by the console driver, via the kbdio module, 263 * to tickle keyboard drivers when the low-level console is being initialized. 264 * Almost nothing in the kernel has been initialied yet. Try to probe 265 * keyboards if possible. 266 * NOTE: because of the way the low-level console is initialized, this routine 267 * may be called more than once!! 268 */ 269 static int 270 atkbd_configure(int flags) 271 { 272 keyboard_t *kbd; 273 int arg[2]; 274 int i; 275 276 /* probe the keyboard controller */ 277 atkbdc_configure(); 278 279 /* if the driver is disabled, unregister the keyboard if any */ 280 if ((resource_int_value("atkbd", ATKBD_DEFAULT, "disabled", &i) == 0) 281 && i != 0) { 282 i = kbd_find_keyboard(ATKBD_DRIVER_NAME, ATKBD_DEFAULT); 283 if (i >= 0) { 284 kbd = kbd_get_keyboard(i); 285 kbd_unregister(kbd); 286 kbd->kb_flags &= ~KB_REGISTERED; 287 } 288 return 0; 289 } 290 291 /* XXX: a kludge to obtain the device configuration flags */ 292 if (resource_int_value("atkbd", ATKBD_DEFAULT, "flags", &i) == 0) 293 flags |= i; 294 295 /* probe the default keyboard */ 296 arg[0] = -1; 297 arg[1] = -1; 298 kbd = NULL; 299 if (atkbd_probe(ATKBD_DEFAULT, arg, flags)) 300 return 0; 301 if (atkbd_init(ATKBD_DEFAULT, &kbd, arg, flags)) 302 return 0; 303 304 /* return the number of found keyboards */ 305 return 1; 306 } 307 308 /* low-level functions */ 309 310 /* detect a keyboard */ 311 static int 312 atkbd_probe(int unit, void *arg, int flags) 313 { 314 KBDC kbdc; 315 int *data = (int *)arg; /* data[0]: controller, data[1]: irq */ 316 317 if (unit == ATKBD_DEFAULT) { 318 if (KBD_IS_PROBED(&default_kbd)) 319 return 0; 320 } 321 322 kbdc = atkbdc_open(data[0]); 323 if (kbdc == NULL) 324 return ENXIO; 325 if (probe_keyboard(kbdc, flags)) { 326 if (flags & KB_CONF_FAIL_IF_NO_KBD) 327 return ENXIO; 328 } 329 return 0; 330 } 331 332 /* reset and initialize the device */ 333 static int 334 atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags) 335 { 336 keyboard_t *kbd; 337 atkbd_state_t *state; 338 keymap_t *keymap; 339 accentmap_t *accmap; 340 fkeytab_t *fkeymap; 341 int fkeymap_size; 342 int delay[2]; 343 int *data = (int *)arg; /* data[0]: controller, data[1]: irq */ 344 345 /* XXX */ 346 if (unit == ATKBD_DEFAULT) { 347 *kbdp = kbd = &default_kbd; 348 if (KBD_IS_INITIALIZED(kbd) && KBD_IS_CONFIGURED(kbd)) 349 return 0; 350 state = &default_kbd_state; 351 keymap = &default_keymap; 352 accmap = &default_accentmap; 353 fkeymap = default_fkeytab; 354 fkeymap_size = 355 sizeof(default_fkeytab)/sizeof(default_fkeytab[0]); 356 } else if (*kbdp == NULL) { 357 *kbdp = kbd = malloc(sizeof(*kbd), M_DEVBUF, M_WAITOK|M_ZERO); 358 state = malloc(sizeof(*state), M_DEVBUF, M_WAITOK|M_ZERO); 359 keymap = malloc(sizeof(key_map), M_DEVBUF, M_WAITOK); 360 accmap = malloc(sizeof(accent_map), M_DEVBUF, M_WAITOK); 361 fkeymap = malloc(sizeof(fkey_tab), M_DEVBUF, M_WAITOK); 362 fkeymap_size = sizeof(fkey_tab)/sizeof(fkey_tab[0]); 363 } else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) { 364 return 0; 365 } else { 366 kbd = *kbdp; 367 state = (atkbd_state_t *)kbd->kb_data; 368 bzero(state, sizeof(*state)); 369 keymap = kbd->kb_keymap; 370 accmap = kbd->kb_accentmap; 371 fkeymap = kbd->kb_fkeytab; 372 fkeymap_size = kbd->kb_fkeytab_size; 373 } 374 375 if (!KBD_IS_PROBED(kbd)) { 376 state->kbdc = atkbdc_open(data[0]); 377 if (state->kbdc == NULL) 378 return ENXIO; 379 kbd_init_struct(kbd, ATKBD_DRIVER_NAME, KB_OTHER, unit, flags, 380 KB_PRI_ATKBD, 0, 0); 381 bcopy(&key_map, keymap, sizeof(key_map)); 382 bcopy(&accent_map, accmap, sizeof(accent_map)); 383 bcopy(fkey_tab, fkeymap, 384 imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab))); 385 kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size); 386 kbd->kb_data = (void *)state; 387 388 if (probe_keyboard(state->kbdc, flags)) { /* shouldn't happen */ 389 if (flags & KB_CONF_FAIL_IF_NO_KBD) 390 return ENXIO; 391 } else { 392 KBD_FOUND_DEVICE(kbd); 393 } 394 atkbd_clear_state(kbd); 395 state->ks_mode = K_XLATE; 396 /* 397 * FIXME: set the initial value for lock keys in ks_state 398 * according to the BIOS data? 399 */ 400 KBD_PROBE_DONE(kbd); 401 } 402 if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) { 403 kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY; 404 if (KBD_HAS_DEVICE(kbd) 405 && init_keyboard(state->kbdc, &kbd->kb_type, kbd->kb_config) 406 && (kbd->kb_config & KB_CONF_FAIL_IF_NO_KBD)) 407 return ENXIO; 408 atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state); 409 get_typematic(kbd); 410 delay[0] = kbd->kb_delay1; 411 delay[1] = kbd->kb_delay2; 412 atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay); 413 KBD_INIT_DONE(kbd); 414 } 415 if (!KBD_IS_CONFIGURED(kbd)) { 416 if (kbd_register(kbd) < 0) 417 return ENXIO; 418 KBD_CONFIG_DONE(kbd); 419 } 420 421 return 0; 422 } 423 424 /* finish using this keyboard */ 425 static int 426 atkbd_term(keyboard_t *kbd) 427 { 428 kbd_unregister(kbd); 429 return 0; 430 } 431 432 /* keyboard interrupt routine */ 433 static int 434 atkbd_intr(keyboard_t *kbd, void *arg) 435 { 436 atkbd_state_t *state; 437 int delay[2]; 438 int c; 439 440 if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) { 441 /* let the callback function to process the input */ 442 (*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT, 443 kbd->kb_callback.kc_arg); 444 } else { 445 /* read and discard the input; no one is waiting for input */ 446 do { 447 c = atkbd_read_char(kbd, FALSE); 448 } while (c != NOKEY); 449 450 if (!KBD_HAS_DEVICE(kbd)) { 451 /* 452 * The keyboard was not detected before; 453 * it must have been reconnected! 454 */ 455 state = (atkbd_state_t *)kbd->kb_data; 456 init_keyboard(state->kbdc, &kbd->kb_type, 457 kbd->kb_config); 458 atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state); 459 get_typematic(kbd); 460 delay[0] = kbd->kb_delay1; 461 delay[1] = kbd->kb_delay2; 462 atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay); 463 KBD_FOUND_DEVICE(kbd); 464 } 465 } 466 return 0; 467 } 468 469 /* test the interface to the device */ 470 static int 471 atkbd_test_if(keyboard_t *kbd) 472 { 473 int error; 474 int s; 475 476 error = 0; 477 empty_both_buffers(((atkbd_state_t *)kbd->kb_data)->kbdc, 10); 478 s = spltty(); 479 if (!test_controller(((atkbd_state_t *)kbd->kb_data)->kbdc)) 480 error = EIO; 481 else if (test_kbd_port(((atkbd_state_t *)kbd->kb_data)->kbdc) != 0) 482 error = EIO; 483 splx(s); 484 485 return error; 486 } 487 488 /* 489 * Enable the access to the device; until this function is called, 490 * the client cannot read from the keyboard. 491 */ 492 static int 493 atkbd_enable(keyboard_t *kbd) 494 { 495 int s; 496 497 s = spltty(); 498 KBD_ACTIVATE(kbd); 499 splx(s); 500 return 0; 501 } 502 503 /* disallow the access to the device */ 504 static int 505 atkbd_disable(keyboard_t *kbd) 506 { 507 int s; 508 509 s = spltty(); 510 KBD_DEACTIVATE(kbd); 511 splx(s); 512 return 0; 513 } 514 515 /* read one byte from the keyboard if it's allowed */ 516 static int 517 atkbd_read(keyboard_t *kbd, int wait) 518 { 519 int c; 520 521 if (wait) 522 c = read_kbd_data(((atkbd_state_t *)kbd->kb_data)->kbdc); 523 else 524 c = read_kbd_data_no_wait(((atkbd_state_t *)kbd->kb_data)->kbdc); 525 if (c != -1) 526 ++kbd->kb_count; 527 return (KBD_IS_ACTIVE(kbd) ? c : -1); 528 } 529 530 /* check if data is waiting */ 531 static int 532 atkbd_check(keyboard_t *kbd) 533 { 534 if (!KBD_IS_ACTIVE(kbd)) 535 return FALSE; 536 return kbdc_data_ready(((atkbd_state_t *)kbd->kb_data)->kbdc); 537 } 538 539 /* read char from the keyboard */ 540 static u_int 541 atkbd_read_char(keyboard_t *kbd, int wait) 542 { 543 atkbd_state_t *state; 544 u_int action; 545 int scancode; 546 int keycode; 547 548 state = (atkbd_state_t *)kbd->kb_data; 549 next_code: 550 /* do we have a composed char to return? */ 551 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) { 552 action = state->ks_composed_char; 553 state->ks_composed_char = 0; 554 if (action > UCHAR_MAX) 555 return ERRKEY; 556 return action; 557 } 558 559 /* see if there is something in the keyboard port */ 560 if (wait) { 561 do { 562 scancode = read_kbd_data(state->kbdc); 563 } while (scancode == -1); 564 } else { 565 scancode = read_kbd_data_no_wait(state->kbdc); 566 if (scancode == -1) 567 return NOKEY; 568 } 569 ++kbd->kb_count; 570 571 #if KBDIO_DEBUG >= 10 572 printf("atkbd_read_char(): scancode:0x%x\n", scancode); 573 #endif 574 575 /* return the byte as is for the K_RAW mode */ 576 if (state->ks_mode == K_RAW) 577 return scancode; 578 579 /* translate the scan code into a keycode */ 580 keycode = scancode & 0x7F; 581 switch (state->ks_prefix) { 582 case 0x00: /* normal scancode */ 583 switch(scancode) { 584 case 0xB8: /* left alt (compose key) released */ 585 if (state->ks_flags & COMPOSE) { 586 state->ks_flags &= ~COMPOSE; 587 if (state->ks_composed_char > UCHAR_MAX) 588 state->ks_composed_char = 0; 589 } 590 break; 591 case 0x38: /* left alt (compose key) pressed */ 592 if (!(state->ks_flags & COMPOSE)) { 593 state->ks_flags |= COMPOSE; 594 state->ks_composed_char = 0; 595 } 596 break; 597 case 0xE0: 598 case 0xE1: 599 state->ks_prefix = scancode; 600 goto next_code; 601 } 602 break; 603 case 0xE0: /* 0xE0 prefix */ 604 state->ks_prefix = 0; 605 switch (keycode) { 606 case 0x1C: /* right enter key */ 607 keycode = 0x59; 608 break; 609 case 0x1D: /* right ctrl key */ 610 keycode = 0x5A; 611 break; 612 case 0x35: /* keypad divide key */ 613 keycode = 0x5B; 614 break; 615 case 0x37: /* print scrn key */ 616 keycode = 0x5C; 617 break; 618 case 0x38: /* right alt key (alt gr) */ 619 keycode = 0x5D; 620 break; 621 case 0x46: /* ctrl-pause/break on AT 101 (see below) */ 622 keycode = 0x68; 623 break; 624 case 0x47: /* grey home key */ 625 keycode = 0x5E; 626 break; 627 case 0x48: /* grey up arrow key */ 628 keycode = 0x5F; 629 break; 630 case 0x49: /* grey page up key */ 631 keycode = 0x60; 632 break; 633 case 0x4B: /* grey left arrow key */ 634 keycode = 0x61; 635 break; 636 case 0x4D: /* grey right arrow key */ 637 keycode = 0x62; 638 break; 639 case 0x4F: /* grey end key */ 640 keycode = 0x63; 641 break; 642 case 0x50: /* grey down arrow key */ 643 keycode = 0x64; 644 break; 645 case 0x51: /* grey page down key */ 646 keycode = 0x65; 647 break; 648 case 0x52: /* grey insert key */ 649 keycode = 0x66; 650 break; 651 case 0x53: /* grey delete key */ 652 keycode = 0x67; 653 break; 654 /* the following 3 are only used on the MS "Natural" keyboard */ 655 case 0x5b: /* left Window key */ 656 keycode = 0x69; 657 break; 658 case 0x5c: /* right Window key */ 659 keycode = 0x6a; 660 break; 661 case 0x5d: /* menu key */ 662 keycode = 0x6b; 663 break; 664 default: /* ignore everything else */ 665 goto next_code; 666 } 667 break; 668 case 0xE1: /* 0xE1 prefix */ 669 /* 670 * The pause/break key on the 101 keyboard produces: 671 * E1-1D-45 E1-9D-C5 672 * Ctrl-pause/break produces: 673 * E0-46 E0-C6 (See above.) 674 */ 675 state->ks_prefix = 0; 676 if (keycode == 0x1D) 677 state->ks_prefix = 0x1D; 678 goto next_code; 679 /* NOT REACHED */ 680 case 0x1D: /* pause / break */ 681 state->ks_prefix = 0; 682 if (keycode != 0x45) 683 goto next_code; 684 keycode = 0x68; 685 break; 686 } 687 688 if (kbd->kb_type == KB_84) { 689 switch (keycode) { 690 case 0x37: /* *(numpad)/print screen */ 691 if (state->ks_flags & SHIFTS) 692 keycode = 0x5c; /* print screen */ 693 break; 694 case 0x45: /* num lock/pause */ 695 if (state->ks_flags & CTLS) 696 keycode = 0x68; /* pause */ 697 break; 698 case 0x46: /* scroll lock/break */ 699 if (state->ks_flags & CTLS) 700 keycode = 0x6c; /* break */ 701 break; 702 } 703 } else if (kbd->kb_type == KB_101) { 704 switch (keycode) { 705 case 0x5c: /* print screen */ 706 if (state->ks_flags & ALTS) 707 keycode = 0x54; /* sysrq */ 708 break; 709 case 0x68: /* pause/break */ 710 if (state->ks_flags & CTLS) 711 keycode = 0x6c; /* break */ 712 break; 713 } 714 } 715 716 /* return the key code in the K_CODE mode */ 717 if (state->ks_mode == K_CODE) 718 return (keycode | (scancode & 0x80)); 719 720 /* compose a character code */ 721 if (state->ks_flags & COMPOSE) { 722 switch (keycode | (scancode & 0x80)) { 723 /* key pressed, process it */ 724 case 0x47: case 0x48: case 0x49: /* keypad 7,8,9 */ 725 state->ks_composed_char *= 10; 726 state->ks_composed_char += keycode - 0x40; 727 if (state->ks_composed_char > UCHAR_MAX) 728 return ERRKEY; 729 goto next_code; 730 case 0x4B: case 0x4C: case 0x4D: /* keypad 4,5,6 */ 731 state->ks_composed_char *= 10; 732 state->ks_composed_char += keycode - 0x47; 733 if (state->ks_composed_char > UCHAR_MAX) 734 return ERRKEY; 735 goto next_code; 736 case 0x4F: case 0x50: case 0x51: /* keypad 1,2,3 */ 737 state->ks_composed_char *= 10; 738 state->ks_composed_char += keycode - 0x4E; 739 if (state->ks_composed_char > UCHAR_MAX) 740 return ERRKEY; 741 goto next_code; 742 case 0x52: /* keypad 0 */ 743 state->ks_composed_char *= 10; 744 if (state->ks_composed_char > UCHAR_MAX) 745 return ERRKEY; 746 goto next_code; 747 748 /* key released, no interest here */ 749 case 0xC7: case 0xC8: case 0xC9: /* keypad 7,8,9 */ 750 case 0xCB: case 0xCC: case 0xCD: /* keypad 4,5,6 */ 751 case 0xCF: case 0xD0: case 0xD1: /* keypad 1,2,3 */ 752 case 0xD2: /* keypad 0 */ 753 goto next_code; 754 755 case 0x38: /* left alt key */ 756 break; 757 758 default: 759 if (state->ks_composed_char > 0) { 760 state->ks_flags &= ~COMPOSE; 761 state->ks_composed_char = 0; 762 return ERRKEY; 763 } 764 break; 765 } 766 } 767 768 /* keycode to key action */ 769 action = genkbd_keyaction(kbd, keycode, scancode & 0x80, 770 &state->ks_state, &state->ks_accents); 771 if (action == NOKEY) 772 goto next_code; 773 else 774 return action; 775 } 776 777 /* check if char is waiting */ 778 static int 779 atkbd_check_char(keyboard_t *kbd) 780 { 781 atkbd_state_t *state; 782 783 if (!KBD_IS_ACTIVE(kbd)) 784 return FALSE; 785 state = (atkbd_state_t *)kbd->kb_data; 786 if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) 787 return TRUE; 788 return kbdc_data_ready(state->kbdc); 789 } 790 791 /* some useful control functions */ 792 static int 793 atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg) 794 { 795 /* trasnlate LED_XXX bits into the device specific bits */ 796 static u_char ledmap[8] = { 797 0, 4, 2, 6, 1, 5, 3, 7, 798 }; 799 atkbd_state_t *state = kbd->kb_data; 800 int error; 801 int s; 802 int i; 803 804 s = spltty(); 805 switch (cmd) { 806 807 case KDGKBMODE: /* get keyboard mode */ 808 *(int *)arg = state->ks_mode; 809 break; 810 case KDSKBMODE: /* set keyboard mode */ 811 switch (*(int *)arg) { 812 case K_XLATE: 813 if (state->ks_mode != K_XLATE) { 814 /* make lock key state and LED state match */ 815 state->ks_state &= ~LOCK_MASK; 816 state->ks_state |= KBD_LED_VAL(kbd); 817 } 818 /* FALL THROUGH */ 819 case K_RAW: 820 case K_CODE: 821 if (state->ks_mode != *(int *)arg) { 822 atkbd_clear_state(kbd); 823 state->ks_mode = *(int *)arg; 824 } 825 break; 826 default: 827 splx(s); 828 return EINVAL; 829 } 830 break; 831 832 case KDGETLED: /* get keyboard LED */ 833 *(int *)arg = KBD_LED_VAL(kbd); 834 break; 835 case KDSETLED: /* set keyboard LED */ 836 /* NOTE: lock key state in ks_state won't be changed */ 837 if (*(int *)arg & ~LOCK_MASK) { 838 splx(s); 839 return EINVAL; 840 } 841 i = *(int *)arg; 842 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */ 843 if (state->ks_mode == K_XLATE && 844 kbd->kb_keymap->n_keys > ALTGR_OFFSET) { 845 if (i & ALKED) 846 i |= CLKED; 847 else 848 i &= ~CLKED; 849 } 850 if (KBD_HAS_DEVICE(kbd)) { 851 error = write_kbd(state->kbdc, KBDC_SET_LEDS, 852 ledmap[i & LED_MASK]); 853 if (error) { 854 splx(s); 855 return error; 856 } 857 } 858 KBD_LED_VAL(kbd) = *(int *)arg; 859 break; 860 861 case KDGKBSTATE: /* get lock key state */ 862 *(int *)arg = state->ks_state & LOCK_MASK; 863 break; 864 case KDSKBSTATE: /* set lock key state */ 865 if (*(int *)arg & ~LOCK_MASK) { 866 splx(s); 867 return EINVAL; 868 } 869 state->ks_state &= ~LOCK_MASK; 870 state->ks_state |= *(int *)arg; 871 splx(s); 872 /* set LEDs and quit */ 873 return atkbd_ioctl(kbd, KDSETLED, arg); 874 875 case KDSETREPEAT: /* set keyboard repeat rate (new interface) */ 876 splx(s); 877 if (!KBD_HAS_DEVICE(kbd)) 878 return 0; 879 i = typematic(((int *)arg)[0], ((int *)arg)[1]); 880 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, i); 881 if (error == 0) { 882 kbd->kb_delay1 = typematic_delay(i); 883 kbd->kb_delay2 = typematic_rate(i); 884 } 885 return error; 886 887 case KDSETRAD: /* set keyboard repeat rate (old interface) */ 888 splx(s); 889 if (!KBD_HAS_DEVICE(kbd)) 890 return 0; 891 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, *(int *)arg); 892 if (error == 0) { 893 kbd->kb_delay1 = typematic_delay(*(int *)arg); 894 kbd->kb_delay2 = typematic_rate(*(int *)arg); 895 } 896 return error; 897 898 case PIO_KEYMAP: /* set keyboard translation table */ 899 case PIO_KEYMAPENT: /* set keyboard translation table entry */ 900 case PIO_DEADKEYMAP: /* set accent key translation table */ 901 state->ks_accents = 0; 902 /* FALL THROUGH */ 903 default: 904 splx(s); 905 return genkbd_commonioctl(kbd, cmd, arg); 906 } 907 908 splx(s); 909 return 0; 910 } 911 912 /* lock the access to the keyboard */ 913 static int 914 atkbd_lock(keyboard_t *kbd, int lock) 915 { 916 return kbdc_lock(((atkbd_state_t *)kbd->kb_data)->kbdc, lock); 917 } 918 919 /* clear the internal state of the keyboard */ 920 static void 921 atkbd_clear_state(keyboard_t *kbd) 922 { 923 atkbd_state_t *state; 924 925 state = (atkbd_state_t *)kbd->kb_data; 926 state->ks_flags = 0; 927 state->ks_polling = 0; 928 state->ks_state &= LOCK_MASK; /* preserve locking key state */ 929 state->ks_accents = 0; 930 state->ks_composed_char = 0; 931 #if 0 932 state->ks_prefix = 0; /* XXX */ 933 #endif 934 } 935 936 /* save the internal state */ 937 static int 938 atkbd_get_state(keyboard_t *kbd, void *buf, size_t len) 939 { 940 if (len == 0) 941 return sizeof(atkbd_state_t); 942 if (len < sizeof(atkbd_state_t)) 943 return -1; 944 bcopy(kbd->kb_data, buf, sizeof(atkbd_state_t)); 945 return 0; 946 } 947 948 /* set the internal state */ 949 static int 950 atkbd_set_state(keyboard_t *kbd, void *buf, size_t len) 951 { 952 if (len < sizeof(atkbd_state_t)) 953 return ENOMEM; 954 if (((atkbd_state_t *)kbd->kb_data)->kbdc 955 != ((atkbd_state_t *)buf)->kbdc) 956 return ENOMEM; 957 bcopy(buf, kbd->kb_data, sizeof(atkbd_state_t)); 958 return 0; 959 } 960 961 static int 962 atkbd_poll(keyboard_t *kbd, int on) 963 { 964 atkbd_state_t *state; 965 int s; 966 967 state = (atkbd_state_t *)kbd->kb_data; 968 s = spltty(); 969 if (on) 970 ++state->ks_polling; 971 else 972 --state->ks_polling; 973 splx(s); 974 return 0; 975 } 976 977 /* local functions */ 978 979 static int 980 get_typematic(keyboard_t *kbd) 981 { 982 #ifdef __i386__ 983 /* 984 * Only some systems allow us to retrieve the keyboard repeat 985 * rate previously set via the BIOS... 986 */ 987 struct vm86frame vmf; 988 u_int32_t p; 989 990 bzero(&vmf, sizeof(vmf)); 991 vmf.vmf_ax = 0xc000; 992 vm86_intcall(0x15, &vmf); 993 if ((vmf.vmf_eflags & PSL_C) || vmf.vmf_ah) 994 return ENODEV; 995 p = BIOS_PADDRTOVADDR(((u_int32_t)vmf.vmf_es << 4) + vmf.vmf_bx); 996 if ((readb(p + 6) & 0x40) == 0) /* int 16, function 0x09 supported? */ 997 return ENODEV; 998 vmf.vmf_ax = 0x0900; 999 vm86_intcall(0x16, &vmf); 1000 if ((vmf.vmf_al & 0x08) == 0) /* int 16, function 0x0306 supported? */ 1001 return ENODEV; 1002 vmf.vmf_ax = 0x0306; 1003 vm86_intcall(0x16, &vmf); 1004 kbd->kb_delay1 = typematic_delay(vmf.vmf_bh << 5); 1005 kbd->kb_delay2 = typematic_rate(vmf.vmf_bl); 1006 return 0; 1007 #else 1008 return ENODEV; 1009 #endif /* __i386__ */ 1010 } 1011 1012 static int 1013 setup_kbd_port(KBDC kbdc, int port, int intr) 1014 { 1015 if (!set_controller_command_byte(kbdc, 1016 KBD_KBD_CONTROL_BITS, 1017 ((port) ? KBD_ENABLE_KBD_PORT : KBD_DISABLE_KBD_PORT) 1018 | ((intr) ? KBD_ENABLE_KBD_INT : KBD_DISABLE_KBD_INT))) 1019 return 1; 1020 return 0; 1021 } 1022 1023 static int 1024 get_kbd_echo(KBDC kbdc) 1025 { 1026 /* enable the keyboard port, but disable the keyboard intr. */ 1027 if (setup_kbd_port(kbdc, TRUE, FALSE)) 1028 /* CONTROLLER ERROR: there is very little we can do... */ 1029 return ENXIO; 1030 1031 /* see if something is present */ 1032 write_kbd_command(kbdc, KBDC_ECHO); 1033 if (read_kbd_data(kbdc) != KBD_ECHO) { 1034 empty_both_buffers(kbdc, 10); 1035 test_controller(kbdc); 1036 test_kbd_port(kbdc); 1037 return ENXIO; 1038 } 1039 1040 /* enable the keyboard port and intr. */ 1041 if (setup_kbd_port(kbdc, TRUE, TRUE)) { 1042 /* 1043 * CONTROLLER ERROR 1044 * This is serious; the keyboard intr is left disabled! 1045 */ 1046 return ENXIO; 1047 } 1048 1049 return 0; 1050 } 1051 1052 static int 1053 probe_keyboard(KBDC kbdc, int flags) 1054 { 1055 /* 1056 * Don't try to print anything in this function. The low-level 1057 * console may not have been initialized yet... 1058 */ 1059 int err; 1060 int c; 1061 int m; 1062 1063 if (!kbdc_lock(kbdc, TRUE)) { 1064 /* driver error? */ 1065 return ENXIO; 1066 } 1067 1068 /* temporarily block data transmission from the keyboard */ 1069 write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT); 1070 1071 /* flush any noise in the buffer */ 1072 empty_both_buffers(kbdc, 100); 1073 1074 /* save the current keyboard controller command byte */ 1075 m = kbdc_get_device_mask(kbdc) & ~KBD_KBD_CONTROL_BITS; 1076 c = get_controller_command_byte(kbdc); 1077 if (c == -1) { 1078 /* CONTROLLER ERROR */ 1079 kbdc_set_device_mask(kbdc, m); 1080 kbdc_lock(kbdc, FALSE); 1081 return ENXIO; 1082 } 1083 1084 /* 1085 * The keyboard may have been screwed up by the boot block. 1086 * We may just be able to recover from error by testing the controller 1087 * and the keyboard port. The controller command byte needs to be 1088 * saved before this recovery operation, as some controllers seem 1089 * to set the command byte to particular values. 1090 */ 1091 test_controller(kbdc); 1092 test_kbd_port(kbdc); 1093 1094 err = get_kbd_echo(kbdc); 1095 1096 /* 1097 * Even if the keyboard doesn't seem to be present (err != 0), 1098 * we shall enable the keyboard port and interrupt so that 1099 * the driver will be operable when the keyboard is attached 1100 * to the system later. It is NOT recommended to hot-plug 1101 * the AT keyboard, but many people do so... 1102 */ 1103 kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS); 1104 setup_kbd_port(kbdc, TRUE, TRUE); 1105 #if 0 1106 if (err == 0) { 1107 kbdc_set_device_mask(kbdc, m | KBD_KBD_CONTROL_BITS); 1108 } else { 1109 /* try to restore the command byte as before */ 1110 set_controller_command_byte(kbdc, 0xff, c); 1111 kbdc_set_device_mask(kbdc, m); 1112 } 1113 #endif 1114 1115 kbdc_lock(kbdc, FALSE); 1116 return err; 1117 } 1118 1119 static int 1120 init_keyboard(KBDC kbdc, int *type, int flags) 1121 { 1122 int codeset; 1123 int id; 1124 int c; 1125 1126 if (!kbdc_lock(kbdc, TRUE)) { 1127 /* driver error? */ 1128 return EIO; 1129 } 1130 1131 /* temporarily block data transmission from the keyboard */ 1132 write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT); 1133 1134 /* save the current controller command byte */ 1135 empty_both_buffers(kbdc, 200); 1136 c = get_controller_command_byte(kbdc); 1137 if (c == -1) { 1138 /* CONTROLLER ERROR */ 1139 kbdc_lock(kbdc, FALSE); 1140 printf("atkbd: unable to get the current command byte value.\n"); 1141 return EIO; 1142 } 1143 if (bootverbose) 1144 printf("atkbd: the current kbd controller command byte %04x\n", 1145 c); 1146 #if 0 1147 /* override the keyboard lock switch */ 1148 c |= KBD_OVERRIDE_KBD_LOCK; 1149 #endif 1150 1151 /* enable the keyboard port, but disable the keyboard intr. */ 1152 if (setup_kbd_port(kbdc, TRUE, FALSE)) { 1153 /* CONTROLLER ERROR: there is very little we can do... */ 1154 printf("atkbd: unable to set the command byte.\n"); 1155 kbdc_lock(kbdc, FALSE); 1156 return EIO; 1157 } 1158 1159 /* 1160 * Check if we have an XT keyboard before we attempt to reset it. 1161 * The procedure assumes that the keyboard and the controller have 1162 * been set up properly by BIOS and have not been messed up 1163 * during the boot process. 1164 */ 1165 codeset = -1; 1166 if (flags & KB_CONF_ALT_SCANCODESET) 1167 /* the user says there is a XT keyboard */ 1168 codeset = 1; 1169 #ifdef KBD_DETECT_XT_KEYBOARD 1170 else if ((c & KBD_TRANSLATION) == 0) { 1171 /* SET_SCANCODE_SET is not always supported; ignore error */ 1172 if (send_kbd_command_and_data(kbdc, KBDC_SET_SCANCODE_SET, 0) 1173 == KBD_ACK) 1174 codeset = read_kbd_data(kbdc); 1175 } 1176 if (bootverbose) 1177 printf("atkbd: scancode set %d\n", codeset); 1178 #endif /* KBD_DETECT_XT_KEYBOARD */ 1179 1180 *type = KB_OTHER; 1181 id = get_kbd_id(kbdc); 1182 switch(id) { 1183 case 0x41ab: /* 101/102/... Enhanced */ 1184 case 0x83ab: /* ditto */ 1185 case 0x54ab: /* SpaceSaver */ 1186 case 0x84ab: /* ditto */ 1187 #if 0 1188 case 0x90ab: /* 'G' */ 1189 case 0x91ab: /* 'P' */ 1190 case 0x92ab: /* 'A' */ 1191 #endif 1192 *type = KB_101; 1193 break; 1194 case -1: /* AT 84 keyboard doesn't return ID */ 1195 *type = KB_84; 1196 break; 1197 default: 1198 break; 1199 } 1200 if (bootverbose) 1201 printf("atkbd: keyboard ID 0x%x (%d)\n", id, *type); 1202 1203 /* reset keyboard hardware */ 1204 if (!(flags & KB_CONF_NO_RESET) && !reset_kbd(kbdc)) { 1205 /* 1206 * KEYBOARD ERROR 1207 * Keyboard reset may fail either because the keyboard 1208 * doen't exist, or because the keyboard doesn't pass 1209 * the self-test, or the keyboard controller on the 1210 * motherboard and the keyboard somehow fail to shake hands. 1211 * It is just possible, particularly in the last case, 1212 * that the keyoard controller may be left in a hung state. 1213 * test_controller() and test_kbd_port() appear to bring 1214 * the keyboard controller back (I don't know why and how, 1215 * though.) 1216 */ 1217 empty_both_buffers(kbdc, 10); 1218 test_controller(kbdc); 1219 test_kbd_port(kbdc); 1220 /* 1221 * We could disable the keyboard port and interrupt... but, 1222 * the keyboard may still exist (see above). 1223 */ 1224 set_controller_command_byte(kbdc, 0xff, c); 1225 kbdc_lock(kbdc, FALSE); 1226 if (bootverbose) 1227 printf("atkbd: failed to reset the keyboard.\n"); 1228 return EIO; 1229 } 1230 1231 /* 1232 * Allow us to set the XT_KEYBD flag in UserConfig so that keyboards 1233 * such as those on the IBM ThinkPad laptop computers can be used 1234 * with the standard console driver. 1235 */ 1236 if (codeset == 1) { 1237 if (send_kbd_command_and_data(kbdc, 1238 KBDC_SET_SCANCODE_SET, codeset) == KBD_ACK) { 1239 /* XT kbd doesn't need scan code translation */ 1240 c &= ~KBD_TRANSLATION; 1241 } else { 1242 /* 1243 * KEYBOARD ERROR 1244 * The XT kbd isn't usable unless the proper scan 1245 * code set is selected. 1246 */ 1247 set_controller_command_byte(kbdc, 0xff, c); 1248 kbdc_lock(kbdc, FALSE); 1249 printf("atkbd: unable to set the XT keyboard mode.\n"); 1250 return EIO; 1251 } 1252 } 1253 1254 /* enable the keyboard port and intr. */ 1255 if (!set_controller_command_byte(kbdc, 1256 KBD_KBD_CONTROL_BITS | KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK, 1257 (c & (KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK)) 1258 | KBD_ENABLE_KBD_PORT | KBD_ENABLE_KBD_INT)) { 1259 /* 1260 * CONTROLLER ERROR 1261 * This is serious; we are left with the disabled 1262 * keyboard intr. 1263 */ 1264 set_controller_command_byte(kbdc, 0xff, c); 1265 kbdc_lock(kbdc, FALSE); 1266 printf("atkbd: unable to enable the keyboard port and intr.\n"); 1267 return EIO; 1268 } 1269 1270 kbdc_lock(kbdc, FALSE); 1271 return 0; 1272 } 1273 1274 static int 1275 write_kbd(KBDC kbdc, int command, int data) 1276 { 1277 int s; 1278 1279 /* prevent the timeout routine from polling the keyboard */ 1280 if (!kbdc_lock(kbdc, TRUE)) 1281 return EBUSY; 1282 1283 /* disable the keyboard and mouse interrupt */ 1284 s = spltty(); 1285 #if 0 1286 c = get_controller_command_byte(kbdc); 1287 if ((c == -1) 1288 || !set_controller_command_byte(kbdc, 1289 kbdc_get_device_mask(kbdc), 1290 KBD_DISABLE_KBD_PORT | KBD_DISABLE_KBD_INT 1291 | KBD_DISABLE_AUX_PORT | KBD_DISABLE_AUX_INT)) { 1292 /* CONTROLLER ERROR */ 1293 kbdc_lock(kbdc, FALSE); 1294 splx(s); 1295 return EIO; 1296 } 1297 /* 1298 * Now that the keyboard controller is told not to generate 1299 * the keyboard and mouse interrupts, call `splx()' to allow 1300 * the other tty interrupts. The clock interrupt may also occur, 1301 * but the timeout routine (`scrn_timer()') will be blocked 1302 * by the lock flag set via `kbdc_lock()' 1303 */ 1304 splx(s); 1305 #endif 1306 1307 if (send_kbd_command_and_data(kbdc, command, data) != KBD_ACK) 1308 send_kbd_command(kbdc, KBDC_ENABLE_KBD); 1309 1310 #if 0 1311 /* restore the interrupts */ 1312 if (!set_controller_command_byte(kbdc, 1313 kbdc_get_device_mask(kbdc), 1314 c & (KBD_KBD_CONTROL_BITS | KBD_AUX_CONTROL_BITS))) { 1315 /* CONTROLLER ERROR */ 1316 } 1317 #else 1318 splx(s); 1319 #endif 1320 kbdc_lock(kbdc, FALSE); 1321 1322 return 0; 1323 } 1324 1325 static int 1326 get_kbd_id(KBDC kbdc) 1327 { 1328 int id1, id2; 1329 1330 empty_both_buffers(kbdc, 10); 1331 id1 = id2 = -1; 1332 if (send_kbd_command(kbdc, KBDC_SEND_DEV_ID) != KBD_ACK) 1333 return -1; 1334 1335 DELAY(10000); /* 10 msec delay */ 1336 id1 = read_kbd_data(kbdc); 1337 if (id1 != -1) 1338 id2 = read_kbd_data(kbdc); 1339 1340 if ((id1 == -1) || (id2 == -1)) { 1341 empty_both_buffers(kbdc, 10); 1342 test_controller(kbdc); 1343 test_kbd_port(kbdc); 1344 return -1; 1345 } 1346 return ((id2 << 8) | id1); 1347 } 1348 1349 static int delays[] = { 250, 500, 750, 1000 }; 1350 static int rates[] = { 34, 38, 42, 46, 50, 55, 59, 63, 1351 68, 76, 84, 92, 100, 110, 118, 126, 1352 136, 152, 168, 184, 200, 220, 236, 252, 1353 272, 304, 336, 368, 400, 440, 472, 504 }; 1354 1355 static int 1356 typematic_delay(int i) 1357 { 1358 return delays[(i >> 5) & 3]; 1359 } 1360 1361 static int 1362 typematic_rate(int i) 1363 { 1364 return rates[i & 0x1f]; 1365 } 1366 1367 static int 1368 typematic(int delay, int rate) 1369 { 1370 int value; 1371 int i; 1372 1373 for (i = sizeof(delays)/sizeof(delays[0]) - 1; i > 0; --i) { 1374 if (delay >= delays[i]) 1375 break; 1376 } 1377 value = i << 5; 1378 for (i = sizeof(rates)/sizeof(rates[0]) - 1; i > 0; --i) { 1379 if (rate >= rates[i]) 1380 break; 1381 } 1382 value |= i; 1383 return value; 1384 } 1385