sys/dev/misc/kbd/atkbd.c

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