sys/dev/misc/kbd/atkbd.c

   1 /*-
   2  * (MPSAFE)
   3  *
   4  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer as
  12  *    the first lines of this file unmodified.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/dev/kbd/atkbd.c,v 1.25.2.4 2002/04/08 19:21:38 asmodai Exp $
  29  */
  30 /*
  31  * NOTE: All locks are handled by the kbd wrappers.
  32  */
  33
  34 #include "opt_kbd.h"
  35 #include "opt_atkbd.h"
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/bus.h>
  41 #include <sys/proc.h>
  42 #include <sys/malloc.h>
  43 #include <sys/thread2.h>
  44
  45 #ifdef __i386__
  46 #include <machine/md_var.h>
  47 #include <machine/psl.h>
  48 #include <machine/vm86.h>
  49 #include <machine/pc/bios.h>
  50
  51 #include <vm/vm.h>
  52 #include <vm/pmap.h>
  53 #endif /* __i386__ */
  54
  55 #include <sys/kbio.h>
  56 #include "kbdreg.h"
  57 #include "atkbdreg.h"
  58 #include "atkbdcreg.h"
  59
  60 #include <bus/isa/isareg.h>
  61
  62 static timeout_t        atkbd_timeout;
  63
  64 #if 0
  65 static int atkbd_setmuxmode(KBDC kbdc, int value, int *mux_version);
  66 #endif
  67
  68 int
  69 atkbd_probe_unit(int unit, int ctlr, int irq, int flags)
  70 {
  71         keyboard_switch_t *sw;
  72         int args[2];
  73         int error;
  74
  75         sw = kbd_get_switch(ATKBD_DRIVER_NAME);
  76         if (sw == NULL) {
  77                 return ENXIO;
  78         }
  79
  80         args[0] = ctlr;
  81         args[1] = irq;
  82         error = (*sw->probe)(unit, args, flags);
  83
  84         if (error)
  85                 return error;
  86         return 0;
  87 }
  88
  89 int
  90 atkbd_attach_unit(int unit, keyboard_t **kbd, int ctlr, int irq, int flags)
  91 {
  92         keyboard_switch_t *sw;
  93         int args[2];
  94         int error;
  95
  96         sw = kbd_get_switch(ATKBD_DRIVER_NAME);
  97         if (sw == NULL) {
  98                 return ENXIO;
  99         }
 100
 101         /* reset, initialize and enable the device */
 102         args[0] = ctlr;
 103         args[1] = irq;
 104         *kbd = NULL;
 105         error = (*sw->probe)(unit, args, flags);
 106         if (error) {
 107                 return error;
 108         }
 109         error = (*sw->init)(unit, kbd, args, flags);
 110         if (error) {
 111                 return error;
 112         }
 113         (*sw->enable)(*kbd);
 114
 115 #ifdef KBD_INSTALL_CDEV
 116         /* attach a virtual keyboard cdev */
 117         error = kbd_attach(*kbd);
 118         if (error) {
 119                 return error;
 120         }
 121 #endif
 122
 123         /*
 124          * This is a kludge to compensate for lost keyboard interrupts.
 125          * A similar code used to be in syscons. See below. XXX
 126          */
 127         atkbd_timeout(*kbd);
 128
 129         if (bootverbose)
 130                 (*sw->diag)(*kbd, bootverbose);
 131
 132         return 0;
 133 }
 134
 135 static void
 136 atkbd_timeout(void *arg)
 137 {
 138         keyboard_t *kbd;
 139
 140         /*
 141          * The original text of the following comments are extracted
 142          * from syscons.c (1.287)
 143          *
 144          * With release 2.1 of the Xaccel server, the keyboard is left
 145          * hanging pretty often. Apparently an interrupt from the
 146          * keyboard is lost, and I don't know why (yet).
 147          * This ugly hack calls the low-level interrupt routine if input
 148          * is ready for the keyboard and conveniently hides the problem. XXX
 149          *
 150          * Try removing anything stuck in the keyboard controller; whether
 151          * it's a keyboard scan code or mouse data. The low-level
 152          * interrupt routine doesn't read the mouse data directly,
 153          * but the keyboard controller driver will, as a side effect.
 154          */
 155         /*
 156          * And here is bde's original comment about this:
 157          *
 158          * This is necessary to handle edge triggered interrupts - if we
 159          * returned when our IRQ is high due to unserviced input, then there
 160          * would be no more keyboard IRQs until the keyboard is reset by
 161          * external powers.
 162          *
 163          * The keyboard apparently unwedges the irq in most cases.
 164          */
 165         crit_enter();
 166         kbd = (keyboard_t *)arg;
 167         if (kbd_lock(kbd, TRUE)) {
 168                 /*
 169                  * We have seen the lock flag is not set. Let's reset
 170                  * the flag early, otherwise the LED update routine fails
 171                  * which may want the lock during the interrupt routine.
 172                  */
 173                 kbd_lock(kbd, FALSE);
 174                 if (kbd_check_char(kbd))
 175                         kbd_intr(kbd, NULL);
 176         }
 177         callout_reset(&kbd->kb_atkbd_timeout_ch, hz / 10, atkbd_timeout, arg);
 178         crit_exit();
 179 }
 180
 181 /* LOW-LEVEL */
 182
 183 #include <machine/limits.h>
 184 #include <machine/clock.h>
 185
 186 #define ATKBD_DEFAULT   0
 187
 188 typedef struct atkbd_state {
 189         KBDC            kbdc;           /* keyboard controller */
 190         int             ks_mode;        /* input mode (K_XLATE,K_RAW,K_CODE) */
 191         int             ks_flags;       /* flags */
 192 #define COMPOSE         (1 << 0)
 193         int             ks_polling;
 194         int             ks_state;       /* shift/lock key state */
 195         int             ks_accents;     /* accent key index (> 0) */
 196         u_int           ks_composed_char; /* composed char code (> 0) */
 197         u_char          ks_prefix;      /* AT scan code prefix */
 198 } atkbd_state_t;
 199
 200 /* keyboard driver declaration */
 201 static int              atkbd_configure(int flags);
 202 static kbd_probe_t      atkbd_probe;
 203 static kbd_init_t       atkbd_init;
 204 static kbd_term_t       atkbd_term;
 205 static kbd_intr_t       atkbd_intr;
 206 static kbd_test_if_t    atkbd_test_if;
 207 static kbd_enable_t     atkbd_enable;
 208 static kbd_disable_t    atkbd_disable;
 209 static kbd_read_t       atkbd_read;
 210 static kbd_check_t      atkbd_check;
 211 static kbd_read_char_t  atkbd_read_char;
 212 static kbd_check_char_t atkbd_check_char;
 213 static kbd_ioctl_t      atkbd_ioctl;
 214 static kbd_lock_t       atkbd_lock;
 215 static kbd_clear_state_t atkbd_clear_state;
 216 static kbd_get_state_t  atkbd_get_state;
 217 static kbd_set_state_t  atkbd_set_state;
 218 static kbd_poll_mode_t  atkbd_poll;
 219
 220 keyboard_switch_t atkbdsw = {
 221         atkbd_probe,
 222         atkbd_init,
 223         atkbd_term,
 224         atkbd_intr,
 225         atkbd_test_if,
 226         atkbd_enable,
 227         atkbd_disable,
 228         atkbd_read,
 229         atkbd_check,
 230         atkbd_read_char,
 231         atkbd_check_char,
 232         atkbd_ioctl,
 233         atkbd_lock,
 234         atkbd_clear_state,
 235         atkbd_get_state,
 236         atkbd_set_state,
 237         genkbd_get_fkeystr,
 238         atkbd_poll,
 239         genkbd_diag,
 240 };
 241
 242 KEYBOARD_DRIVER(atkbd, atkbdsw, atkbd_configure);
 243
 244 /* local functions */
 245 static int              get_typematic(keyboard_t *kbd);
 246 static int              setup_kbd_port(KBDC kbdc, int port, int intr);
 247 static int              get_kbd_echo(KBDC kbdc);
 248 static int              probe_keyboard(KBDC kbdc, int flags);
 249 static int              init_keyboard(KBDC kbdc, int *type, int flags);
 250 static int              write_kbd(KBDC kbdc, int command, int data);
 251 static int              get_kbd_id(KBDC kbdc, int cmd);
 252 static int              typematic(int delay, int rate);
 253 static int              typematic_delay(int delay);
 254 static int              typematic_rate(int rate);
 255
 256 /* local variables */
 257
 258 /* the initial key map, accent map and fkey strings */
 259 #ifdef ATKBD_DFLT_KEYMAP
 260 #define KBD_DFLT_KEYMAP
 261 #include "atkbdmap.h"
 262 #endif
 263 #include "kbdtables.h"
 264
 265 /* structures for the default keyboard */
 266 static keyboard_t       default_kbd;
 267 static atkbd_state_t    default_kbd_state;
 268 static keymap_t         default_keymap;
 269 static accentmap_t      default_accentmap;
 270 static fkeytab_t        default_fkeytab[NUM_FKEYS];
 271
 272 /*
 273  * The back door to the keyboard driver!
 274  * This function is called by the console driver, via the kbdio module,
 275  * to tickle keyboard drivers when the low-level console is being initialized.
 276  * Almost nothing in the kernel has been initialied yet.  Try to probe
 277  * keyboards if possible.
 278  * NOTE: because of the way the low-level console is initialized, this routine
 279  * may be called more than once!!
 280  */
 281 static int
 282 atkbd_configure(int flags)
 283 {
 284         keyboard_t *kbd;
 285         int arg[2];
 286         int i;
 287
 288         /*
 289          * Probe the keyboard controller, if not present or if the driver
 290          * is disabled, unregister the keyboard if any.
 291          */
 292         if (atkbdc_configure() != 0 ||
 293             resource_disabled("atkbd", ATKBD_DEFAULT)) {
 294                 i = kbd_find_keyboard(ATKBD_DRIVER_NAME, ATKBD_DEFAULT);
 295                 if (i >= 0) {
 296                         kbd = kbd_get_keyboard(i);
 297                         KBD_ALWAYS_LOCK(kbd);
 298                         kbd_unregister(kbd);
 299                         kbd = NULL; /* huh? */
 300                 }
 301                 return 0;
 302         }
 303
 304         /* XXX: a kludge to obtain the device configuration flags */
 305         if (resource_int_value("atkbd", ATKBD_DEFAULT, "flags", &i) == 0)
 306                 flags |= i;
 307
 308         /* probe the default keyboard */
 309         arg[0] = -1;
 310         arg[1] = -1;
 311         kbd = NULL;
 312         if (atkbd_probe(ATKBD_DEFAULT, arg, flags)) {
 313                 return 0;
 314         }
 315         if (atkbd_init(ATKBD_DEFAULT, &kbd, arg, flags)) {
 316                 return 0;
 317         }
 318
 319         /* return the number of found keyboards */
 320         return 1;
 321 }
 322
 323 /* low-level functions */
 324
 325 /* detect a keyboard */
 326 static int
 327 atkbd_probe(int unit, void *arg, int flags)
 328 {
 329         KBDC kbdc;
 330         int *data = (int *)arg; /* data[0]: controller, data[1]: irq */
 331
 332
 333         if (unit == ATKBD_DEFAULT) {
 334                 if (KBD_IS_PROBED(&default_kbd)) {
 335                         return 0;
 336                 }
 337         }
 338
 339         kbdc = atkbdc_open(data[0]);
 340         if (kbdc == NULL) {
 341                 return ENXIO;
 342         }
 343         if (probe_keyboard(kbdc, flags)) {
 344                 if (flags & KB_CONF_FAIL_IF_NO_KBD) {
 345                         return ENXIO;
 346                 }
 347         }
 348
 349         return 0;
 350 }
 351
 352 /* reset and initialize the device */
 353 static int
 354 atkbd_init(int unit, keyboard_t **kbdp, void *arg, int flags)
 355 {
 356         keyboard_t *kbd;
 357         atkbd_state_t *state;
 358         keymap_t *keymap;
 359         accentmap_t *accmap;
 360         fkeytab_t *fkeymap;
 361         int fkeymap_size;
 362         int delay[2];
 363         int *data = (int *)arg; /* data[0]: controller, data[1]: irq */
 364
 365         /* XXX */
 366         if (unit == ATKBD_DEFAULT) {
 367                 *kbdp = kbd = &default_kbd;
 368                 if (KBD_IS_INITIALIZED(kbd) && KBD_IS_CONFIGURED(kbd)) {
 369                         return 0;
 370                 }
 371                 state = &default_kbd_state;
 372                 keymap = &default_keymap;
 373                 accmap = &default_accentmap;
 374                 fkeymap = default_fkeytab;
 375                 fkeymap_size = NELEM(default_fkeytab);
 376         } else if (*kbdp == NULL) {
 377                 *kbdp = kbd = kmalloc(sizeof(*kbd), M_DEVBUF, M_WAITOK|M_ZERO);
 378                 state = kmalloc(sizeof(*state), M_DEVBUF, M_WAITOK|M_ZERO);
 379                 keymap = kmalloc(sizeof(key_map), M_DEVBUF, M_WAITOK);
 380                 accmap = kmalloc(sizeof(accent_map), M_DEVBUF, M_WAITOK);
 381                 fkeymap = kmalloc(sizeof(fkey_tab), M_DEVBUF, M_WAITOK);
 382                 fkeymap_size = NELEM(fkey_tab);
 383         } else if (KBD_IS_INITIALIZED(*kbdp) && KBD_IS_CONFIGURED(*kbdp)) {
 384                 return 0;
 385         } else {
 386                 kbd = *kbdp;
 387                 state = (atkbd_state_t *)kbd->kb_data;
 388                 bzero(state, sizeof(*state));
 389                 keymap = kbd->kb_keymap;
 390                 accmap = kbd->kb_accentmap;
 391                 fkeymap = kbd->kb_fkeytab;
 392                 fkeymap_size = kbd->kb_fkeytab_size;
 393         }
 394
 395         if (!KBD_IS_PROBED(kbd)) {
 396                 state->kbdc = atkbdc_open(data[0]);
 397                 if (state->kbdc == NULL) {
 398                         return ENXIO;
 399                 }
 400                 kbd_init_struct(kbd, ATKBD_DRIVER_NAME, KB_OTHER, unit, flags,
 401                                 KB_PRI_ATKBD, 0, 0);
 402                 bcopy(&key_map, keymap, sizeof(key_map));
 403                 bcopy(&accent_map, accmap, sizeof(accent_map));
 404                 bcopy(fkey_tab, fkeymap,
 405                       imin(fkeymap_size*sizeof(fkeymap[0]), sizeof(fkey_tab)));
 406                 kbd_set_maps(kbd, keymap, accmap, fkeymap, fkeymap_size);
 407                 kbd->kb_data = (void *)state;
 408
 409                 if (probe_keyboard(state->kbdc, flags)) { /* shouldn't happen */
 410                         if (flags & KB_CONF_FAIL_IF_NO_KBD) {
 411                                 return ENXIO;
 412                         }
 413                 } else {
 414                         KBD_FOUND_DEVICE(kbd);
 415                 }
 416                 atkbd_clear_state(kbd);
 417                 state->ks_mode = K_XLATE;
 418                 /*
 419                  * FIXME: set the initial value for lock keys in ks_state
 420                  * according to the BIOS data?
 421                  */
 422                 KBD_PROBE_DONE(kbd);
 423         }
 424         if (!KBD_IS_INITIALIZED(kbd) && !(flags & KB_CONF_PROBE_ONLY)) {
 425                 kbd->kb_config = flags & ~KB_CONF_PROBE_ONLY;
 426                 if (!KBD_HAS_DEVICE(kbd)
 427                     && init_keyboard(state->kbdc, &kbd->kb_type, kbd->kb_config)
 428                     && (kbd->kb_config & KB_CONF_FAIL_IF_NO_KBD)) {
 429                         return ENXIO;
 430                 }
 431                 atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
 432                 get_typematic(kbd);
 433                 delay[0] = kbd->kb_delay1;
 434                 delay[1] = kbd->kb_delay2;
 435                 atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay);
 436                 KBD_FOUND_DEVICE(kbd);
 437                 KBD_INIT_DONE(kbd);
 438         }
 439         if (!KBD_IS_CONFIGURED(kbd)) {
 440                 if (kbd_register(kbd) < 0) {
 441                         return ENXIO;
 442                 }
 443                 KBD_CONFIG_DONE(kbd);
 444         }
 445
 446         return 0;
 447 }
 448
 449 /* finish using this keyboard */
 450 static int
 451 atkbd_term(keyboard_t *kbd)
 452 {
 453         kbd_unregister(kbd);
 454         return 0;
 455 }
 456
 457 /* keyboard interrupt routine */
 458 static int
 459 atkbd_intr(keyboard_t *kbd, void *arg)
 460 {
 461         atkbd_state_t *state;
 462         int delay[2];
 463         int c;
 464
 465         if (KBD_IS_ACTIVE(kbd) && KBD_IS_BUSY(kbd)) {
 466                 /* let the callback function to process the input */
 467                 (*kbd->kb_callback.kc_func)(kbd, KBDIO_KEYINPUT,
 468                                             kbd->kb_callback.kc_arg);
 469         } else {
 470                 /* read and discard the input; no one is waiting for input */
 471                 do {
 472                         c = atkbd_read_char(kbd, FALSE);
 473                 } while (c != NOKEY);
 474
 475                 if (!KBD_HAS_DEVICE(kbd)) {
 476                         /*
 477                          * The keyboard was not detected before;
 478                          * it must have been reconnected!
 479                          */
 480                         state = (atkbd_state_t *)kbd->kb_data;
 481                         init_keyboard(state->kbdc, &kbd->kb_type,
 482                                       kbd->kb_config);
 483                         atkbd_ioctl(kbd, KDSETLED, (caddr_t)&state->ks_state);
 484                         get_typematic(kbd);
 485                         delay[0] = kbd->kb_delay1;
 486                         delay[1] = kbd->kb_delay2;
 487                         atkbd_ioctl(kbd, KDSETREPEAT, (caddr_t)delay);
 488                         KBD_FOUND_DEVICE(kbd);
 489                 }
 490         }
 491
 492         return 0;
 493 }
 494
 495 /* test the interface to the device */
 496 static int
 497 atkbd_test_if(keyboard_t *kbd)
 498 {
 499         int error;
 500
 501         error = 0;
 502         empty_both_buffers(((atkbd_state_t *)kbd->kb_data)->kbdc, 10);
 503         crit_enter();
 504         if (!test_controller(((atkbd_state_t *)kbd->kb_data)->kbdc))
 505                 error = EIO;
 506         else if (test_kbd_port(((atkbd_state_t *)kbd->kb_data)->kbdc) != 0)
 507                 error = EIO;
 508         crit_exit();
 509
 510         return error;
 511 }
 512
 513 /*
 514  * Enable the access to the device; until this function is called,
 515  * the client cannot read from the keyboard.
 516  */
 517 static int
 518 atkbd_enable(keyboard_t *kbd)
 519 {
 520         crit_enter();
 521         KBD_ACTIVATE(kbd);
 522         crit_exit();
 523         return 0;
 524 }
 525
 526 /* disallow the access to the device */
 527 static int
 528 atkbd_disable(keyboard_t *kbd)
 529 {
 530         crit_enter();
 531         KBD_DEACTIVATE(kbd);
 532         crit_exit();
 533         return 0;
 534 }
 535
 536 /* read one byte from the keyboard if it's allowed */
 537 static int
 538 atkbd_read(keyboard_t *kbd, int wait)
 539 {
 540         int c, ret;
 541
 542         if (wait)
 543                 c = read_kbd_data(((atkbd_state_t *)kbd->kb_data)->kbdc);
 544         else
 545                 c = read_kbd_data_no_wait(((atkbd_state_t *)kbd->kb_data)->kbdc);
 546         if (c != -1)
 547                 ++kbd->kb_count;
 548
 549         ret = (KBD_IS_ACTIVE(kbd) ? c : -1);
 550
 551         return ret;
 552 }
 553
 554 /* check if data is waiting */
 555 static int
 556 atkbd_check(keyboard_t *kbd)
 557 {
 558         int ret;
 559
 560         if (!KBD_IS_ACTIVE(kbd)) {
 561                 return FALSE;
 562         }
 563         ret = kbdc_data_ready(((atkbd_state_t *)kbd->kb_data)->kbdc);
 564
 565         return ret;
 566 }
 567
 568 /* read char from the keyboard */
 569 static u_int
 570 atkbd_read_char(keyboard_t *kbd, int wait)
 571 {
 572         atkbd_state_t *state;
 573         u_int action;
 574         int scancode;
 575         int keycode;
 576
 577         state = (atkbd_state_t *)kbd->kb_data;
 578 next_code:
 579         /* do we have a composed char to return? */
 580         if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) {
 581                 action = state->ks_composed_char;
 582                 state->ks_composed_char = 0;
 583                 if (action > UCHAR_MAX) {
 584                         return ERRKEY;
 585                 }
 586                 return action;
 587         }
 588
 589         /* see if there is something in the keyboard port */
 590         if (wait) {
 591                 do {
 592                         scancode = read_kbd_data(state->kbdc);
 593                 } while (scancode == -1);
 594         } else {
 595                 scancode = read_kbd_data_no_wait(state->kbdc);
 596                 if (scancode == -1) {
 597                         return NOKEY;
 598                 }
 599         }
 600         ++kbd->kb_count;
 601
 602 #if KBDIO_DEBUG >= 10
 603         kprintf("atkbd_read_char(): scancode:0x%x\n", scancode);
 604 #endif
 605
 606         /* return the byte as is for the K_RAW mode */
 607         if (state->ks_mode == K_RAW) {
 608                 return scancode;
 609         }
 610
 611         /* translate the scan code into a keycode */
 612         keycode = scancode & 0x7F;
 613         switch (state->ks_prefix) {
 614         case 0x00:      /* normal scancode */
 615                 switch(scancode) {
 616                 case 0xB8:      /* left alt (compose key) released */
 617                         if (state->ks_flags & COMPOSE) {
 618                                 state->ks_flags &= ~COMPOSE;
 619                                 if (state->ks_composed_char > UCHAR_MAX)
 620                                         state->ks_composed_char = 0;
 621                         }
 622                         break;
 623                 case 0x38:      /* left alt (compose key) pressed */
 624                         if (!(state->ks_flags & COMPOSE)) {
 625                                 state->ks_flags |= COMPOSE;
 626                                 state->ks_composed_char = 0;
 627                         }
 628                         break;
 629                 case 0xE0:
 630                 case 0xE1:
 631                         state->ks_prefix = scancode;
 632                         goto next_code;
 633                 }
 634                 break;
 635         case 0xE0:      /* 0xE0 prefix */
 636                 state->ks_prefix = 0;
 637                 switch (keycode) {
 638                 case 0x1C:      /* right enter key */
 639                         keycode = 0x59;
 640                         break;
 641                 case 0x1D:      /* right ctrl key */
 642                         keycode = 0x5A;
 643                         break;
 644                 case 0x35:      /* keypad divide key */
 645                         keycode = 0x5B;
 646                         break;
 647                 case 0x37:      /* print scrn key */
 648                         keycode = 0x5C;
 649                         break;
 650                 case 0x38:      /* right alt key (alt gr) */
 651                         keycode = 0x5D;
 652                         break;
 653                 case 0x46:      /* ctrl-pause/break on AT 101 (see below) */
 654                         keycode = 0x68;
 655                         break;
 656                 case 0x47:      /* grey home key */
 657                         keycode = 0x5E;
 658                         break;
 659                 case 0x48:      /* grey up arrow key */
 660                         keycode = 0x5F;
 661                         break;
 662                 case 0x49:      /* grey page up key */
 663                         keycode = 0x60;
 664                         break;
 665                 case 0x4B:      /* grey left arrow key */
 666                         keycode = 0x61;
 667                         break;
 668                 case 0x4D:      /* grey right arrow key */
 669                         keycode = 0x62;
 670                         break;
 671                 case 0x4F:      /* grey end key */
 672                         keycode = 0x63;
 673                         break;
 674                 case 0x50:      /* grey down arrow key */
 675                         keycode = 0x64;
 676                         break;
 677                 case 0x51:      /* grey page down key */
 678                         keycode = 0x65;
 679                         break;
 680                 case 0x52:      /* grey insert key */
 681                         keycode = 0x66;
 682                         break;
 683                 case 0x53:      /* grey delete key */
 684                         keycode = 0x67;
 685                         break;
 686                 /* the following 3 are only used on the MS "Natural" keyboard */
 687                 case 0x5b:      /* left Window key */
 688                         keycode = 0x69;
 689                         break;
 690                 case 0x5c:      /* right Window key */
 691                         keycode = 0x6a;
 692                         break;
 693                 case 0x5d:      /* menu key */
 694                         keycode = 0x6b;
 695                         break;
 696                 default:        /* ignore everything else */
 697                         goto next_code;
 698                 }
 699                 break;
 700         case 0xE1:      /* 0xE1 prefix */
 701                 /*
 702                  * The pause/break key on the 101 keyboard produces:
 703                  * E1-1D-45 E1-9D-C5
 704                  * Ctrl-pause/break produces:
 705                  * E0-46 E0-C6 (See above.)
 706                  */
 707                 state->ks_prefix = 0;
 708                 if (keycode == 0x1D)
 709                         state->ks_prefix = 0x1D;
 710                 goto next_code;
 711                 /* NOT REACHED */
 712         case 0x1D:      /* pause / break */
 713                 state->ks_prefix = 0;
 714                 if (keycode != 0x45)
 715                         goto next_code;
 716                 keycode = 0x68;
 717                 break;
 718         }
 719
 720         if (kbd->kb_type == KB_84) {
 721                 switch (keycode) {
 722                 case 0x37:      /* *(numpad)/print screen */
 723                         if (state->ks_flags & SHIFTS)
 724                                 keycode = 0x5c; /* print screen */
 725                         break;
 726                 case 0x45:      /* num lock/pause */
 727                         if (state->ks_flags & CTLS)
 728                                 keycode = 0x68; /* pause */
 729                         break;
 730                 case 0x46:      /* scroll lock/break */
 731                         if (state->ks_flags & CTLS)
 732                                 keycode = 0x6c; /* break */
 733                         break;
 734                 }
 735         } else if (kbd->kb_type == KB_101) {
 736                 switch (keycode) {
 737                 case 0x5c:      /* print screen */
 738                         if (state->ks_flags & ALTS)
 739                                 keycode = 0x54; /* sysrq */
 740                         break;
 741                 case 0x68:      /* pause/break */
 742                         if (state->ks_flags & CTLS)
 743                                 keycode = 0x6c; /* break */
 744                         break;
 745                 }
 746         }
 747
 748         /* return the key code in the K_CODE mode */
 749         if (state->ks_mode == K_CODE) {
 750                 return (keycode | (scancode & 0x80));
 751         }
 752
 753         /* compose a character code */
 754         if (state->ks_flags & COMPOSE) {
 755                 switch (keycode | (scancode & 0x80)) {
 756                 /* key pressed, process it */
 757                 case 0x47: case 0x48: case 0x49:        /* keypad 7,8,9 */
 758                         state->ks_composed_char *= 10;
 759                         state->ks_composed_char += keycode - 0x40;
 760                         if (state->ks_composed_char > UCHAR_MAX)
 761                                 return ERRKEY;
 762                         goto next_code;
 763                 case 0x4B: case 0x4C: case 0x4D:        /* keypad 4,5,6 */
 764                         state->ks_composed_char *= 10;
 765                         state->ks_composed_char += keycode - 0x47;
 766                         if (state->ks_composed_char > UCHAR_MAX)
 767                                 return ERRKEY;
 768                         goto next_code;
 769                 case 0x4F: case 0x50: case 0x51:        /* keypad 1,2,3 */
 770                         state->ks_composed_char *= 10;
 771                         state->ks_composed_char += keycode - 0x4E;
 772                         if (state->ks_composed_char > UCHAR_MAX)
 773                                 return ERRKEY;
 774                         goto next_code;
 775                 case 0x52:                              /* keypad 0 */
 776                         state->ks_composed_char *= 10;
 777                         if (state->ks_composed_char > UCHAR_MAX)
 778                                 return ERRKEY;
 779                         goto next_code;
 780
 781                 /* key released, no interest here */
 782                 case 0xC7: case 0xC8: case 0xC9:        /* keypad 7,8,9 */
 783                 case 0xCB: case 0xCC: case 0xCD:        /* keypad 4,5,6 */
 784                 case 0xCF: case 0xD0: case 0xD1:        /* keypad 1,2,3 */
 785                 case 0xD2:                              /* keypad 0 */
 786                         goto next_code;
 787
 788                 case 0x38:                              /* left alt key */
 789                         break;
 790
 791                 default:
 792                         if (state->ks_composed_char > 0) {
 793                                 state->ks_flags &= ~COMPOSE;
 794                                 state->ks_composed_char = 0;
 795                                 return ERRKEY;
 796                         }
 797                         break;
 798                 }
 799         }
 800
 801         /* keycode to key action */
 802         action = genkbd_keyaction(kbd, keycode, scancode & 0x80,
 803                                   &state->ks_state, &state->ks_accents);
 804         if (action == NOKEY) {
 805                 goto next_code;
 806         } else {
 807                 return action;
 808         }
 809 }
 810
 811 /* check if char is waiting */
 812 static int
 813 atkbd_check_char(keyboard_t *kbd)
 814 {
 815         atkbd_state_t *state;
 816         int ret;
 817
 818         if (!KBD_IS_ACTIVE(kbd)) {
 819                 return FALSE;
 820         }
 821         state = (atkbd_state_t *)kbd->kb_data;
 822         if (!(state->ks_flags & COMPOSE) && (state->ks_composed_char > 0)) {
 823                 return TRUE;
 824         }
 825         ret = kbdc_data_ready(state->kbdc);
 826         return ret;
 827 }
 828
 829 /* some useful control functions */
 830 static int
 831 atkbd_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
 832 {
 833         /* trasnlate LED_XXX bits into the device specific bits */
 834         static u_char ledmap[8] = {
 835                 0, 4, 2, 6, 1, 5, 3, 7,
 836         };
 837         atkbd_state_t *state = kbd->kb_data;
 838         int error;
 839         int i;
 840
 841         crit_enter();
 842
 843         switch (cmd) {
 844
 845         case KDGKBMODE:         /* get keyboard mode */
 846                 *(int *)arg = state->ks_mode;
 847                 break;
 848         case KDSKBMODE:         /* set keyboard mode */
 849                 switch (*(int *)arg) {
 850                 case K_XLATE:
 851                         if (state->ks_mode != K_XLATE) {
 852                                 /* make lock key state and LED state match */
 853                                 state->ks_state &= ~LOCK_MASK;
 854                                 state->ks_state |= KBD_LED_VAL(kbd);
 855                         }
 856                         /* FALL THROUGH */
 857                 case K_RAW:
 858                 case K_CODE:
 859                         if (state->ks_mode != *(int *)arg) {
 860                                 atkbd_clear_state(kbd);
 861                                 state->ks_mode = *(int *)arg;
 862                         }
 863                         break;
 864                 default:
 865                         crit_exit();
 866                         return EINVAL;
 867                 }
 868                 break;
 869
 870         case KDGETLED:          /* get keyboard LED */
 871                 *(int *)arg = KBD_LED_VAL(kbd);
 872                 break;
 873         case KDSETLED:          /* set keyboard LED */
 874                 /* NOTE: lock key state in ks_state won't be changed */
 875                 if (*(int *)arg & ~LOCK_MASK) {
 876                         crit_exit();
 877                         return EINVAL;
 878                 }
 879                 i = *(int *)arg;
 880                 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */
 881                 if (state->ks_mode == K_XLATE &&
 882                     kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
 883                         if (i & ALKED)
 884                                 i |= CLKED;
 885                         else
 886                                 i &= ~CLKED;
 887                 }
 888                 if (KBD_HAS_DEVICE(kbd)) {
 889                         error = write_kbd(state->kbdc, KBDC_SET_LEDS,
 890                                           ledmap[i & LED_MASK]);
 891                         if (error) {
 892                                 crit_exit();
 893                                 return error;
 894                         }
 895                 }
 896                 KBD_LED_VAL(kbd) = *(int *)arg;
 897                 break;
 898
 899         case KDGKBSTATE:        /* get lock key state */
 900                 *(int *)arg = state->ks_state & LOCK_MASK;
 901                 break;
 902         case KDSKBSTATE:        /* set lock key state */
 903                 if (*(int *)arg & ~LOCK_MASK) {
 904                         crit_exit();
 905                         return EINVAL;
 906                 }
 907                 state->ks_state &= ~LOCK_MASK;
 908                 state->ks_state |= *(int *)arg;
 909                 crit_exit();
 910                 /* set LEDs and quit */
 911                 return atkbd_ioctl(kbd, KDSETLED, arg);
 912
 913         case KDSETREPEAT:       /* set keyboard repeat rate (new interface) */
 914                 crit_exit();
 915                 if (!KBD_HAS_DEVICE(kbd)) {
 916                         return 0;
 917                 }
 918                 i = typematic(((int *)arg)[0], ((int *)arg)[1]);
 919                 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, i);
 920                 if (error == 0) {
 921                         kbd->kb_delay1 = typematic_delay(i);
 922                         kbd->kb_delay2 = typematic_rate(i);
 923                 }
 924                 return error;
 925
 926         case KDSETRAD:          /* set keyboard repeat rate (old interface) */
 927                 crit_exit();
 928                 if (!KBD_HAS_DEVICE(kbd)) {
 929                         return 0;
 930                 }
 931                 error = write_kbd(state->kbdc, KBDC_SET_TYPEMATIC, *(int *)arg);
 932                 if (error == 0) {
 933                         kbd->kb_delay1 = typematic_delay(*(int *)arg);
 934                         kbd->kb_delay2 = typematic_rate(*(int *)arg);
 935                 }
 936                 return error;
 937
 938         case PIO_KEYMAP:        /* set keyboard translation table */
 939         case PIO_KEYMAPENT:     /* set keyboard translation table entry */
 940         case PIO_DEADKEYMAP:    /* set accent key translation table */
 941                 state->ks_accents = 0;
 942                 /* FALL THROUGH */
 943         default:
 944                 crit_exit();
 945                 return genkbd_commonioctl(kbd, cmd, arg);
 946         }
 947
 948         crit_exit();
 949         return 0;
 950 }
 951
 952 /* lock the access to the keyboard */
 953 static int
 954 atkbd_lock(keyboard_t *kbd, int lock)
 955 {
 956         return kbdc_lock(((atkbd_state_t *)kbd->kb_data)->kbdc, lock);
 957 }
 958
 959 /* clear the internal state of the keyboard */
 960 static void
 961 atkbd_clear_state(keyboard_t *kbd)
 962 {
 963         atkbd_state_t *state;
 964
 965         state = (atkbd_state_t *)kbd->kb_data;
 966         state->ks_flags = 0;
 967         state->ks_polling = 0;
 968         state->ks_state &= LOCK_MASK;   /* preserve locking key state */
 969         state->ks_accents = 0;
 970         state->ks_composed_char = 0;
 971 #if 0
 972         state->ks_prefix = 0; /* XXX */
 973 #endif
 974 }
 975
 976 /* save the internal state */
 977 static int
 978 atkbd_get_state(keyboard_t *kbd, void *buf, size_t len)
 979 {
 980         if (len == 0)
 981                 return sizeof(atkbd_state_t);
 982         if (len < sizeof(atkbd_state_t))
 983                 return -1;
 984
 985         bcopy(kbd->kb_data, buf, sizeof(atkbd_state_t));
 986         return 0;
 987 }
 988
 989 /* set the internal state */
 990 static int
 991 atkbd_set_state(keyboard_t *kbd, void *buf, size_t len)
 992 {
 993         if (len < sizeof(atkbd_state_t))
 994                 return ENOMEM;
 995         if (((atkbd_state_t *)kbd->kb_data)->kbdc
 996                 != ((atkbd_state_t *)buf)->kbdc)
 997                 return ENOMEM;
 998         bcopy(buf, kbd->kb_data, sizeof(atkbd_state_t));
 999         return 0;
1000 }
1001
1002 static int
1003 atkbd_poll(keyboard_t *kbd, int on)
1004 {
1005         atkbd_state_t *state;
1006
1007         state = (atkbd_state_t *)kbd->kb_data;
1008         crit_enter();
1009         if (on)
1010                 state->ks_polling = 1;
1011         else
1012                 state->ks_polling = 0;
1013         crit_exit();
1014         return 0;
1015 }
1016
1017 /* local functions */
1018
1019 static int
1020 get_typematic(keyboard_t *kbd)
1021 {
1022 #ifdef __i386__
1023         /*
1024          * Only some systems allow us to retrieve the keyboard repeat
1025          * rate previously set via the BIOS...
1026          */
1027         struct vm86frame vmf;
1028         u_int32_t p;
1029
1030         bzero(&vmf, sizeof(vmf));
1031         vmf.vmf_ax = 0xc000;
1032         vm86_intcall(0x15, &vmf);
1033         if ((vmf.vmf_eflags & PSL_C) || vmf.vmf_ah)
1034                 return ENODEV;
1035         p = BIOS_PADDRTOVADDR(((u_int32_t)vmf.vmf_es << 4) + vmf.vmf_bx);
1036         if ((readb(p + 6) & 0x40) == 0) /* int 16, function 0x09 supported? */
1037                 return ENODEV;
1038         vmf.vmf_ax = 0x0900;
1039         vm86_intcall(0x16, &vmf);
1040         if ((vmf.vmf_al & 0x08) == 0)   /* int 16, function 0x0306 supported? */
1041                 return ENODEV;
1042         vmf.vmf_ax = 0x0306;
1043         vm86_intcall(0x16, &vmf);
1044         kbd->kb_delay1 = typematic_delay(vmf.vmf_bh << 5);
1045         kbd->kb_delay2 = typematic_rate(vmf.vmf_bl);
1046         return 0;
1047 #else
1048         return ENODEV;
1049 #endif /* __i386__ */
1050 }
1051
1052 static int
1053 setup_kbd_port(KBDC kbdc, int port, int intr)
1054 {
1055         if (!set_controller_command_byte(kbdc,
1056                 KBD_KBD_CONTROL_BITS,
1057                 ((port) ? KBD_ENABLE_KBD_PORT : KBD_DISABLE_KBD_PORT) |
1058                 ((intr) ? KBD_ENABLE_KBD_INT : KBD_DISABLE_KBD_INT)))
1059                 return 1;
1060         return 0;
1061 }
1062
1063 static int
1064 get_kbd_echo(KBDC kbdc)
1065 {
1066         /* enable the keyboard port, but disable the keyboard intr. */
1067         if (setup_kbd_port(kbdc, TRUE, FALSE))
1068                 /* CONTROLLER ERROR: there is very little we can do... */
1069                 return ENXIO;
1070
1071         /* see if something is present */
1072         write_kbd_command(kbdc, KBDC_ECHO);
1073         if (read_kbd_data(kbdc) != KBD_ECHO) {
1074                 empty_both_buffers(kbdc, 10);
1075                 test_controller(kbdc);
1076                 test_kbd_port(kbdc);
1077                 return ENXIO;
1078         }
1079
1080         /* enable the keyboard port and intr. */
1081         if (setup_kbd_port(kbdc, TRUE, TRUE)) {
1082                 /*
1083                  * CONTROLLER ERROR
1084                  * This is serious; the keyboard intr is left disabled!
1085                  */
1086                 return ENXIO;
1087         }
1088
1089         return 0;
1090 }
1091
1092 static int
1093 probe_keyboard(KBDC kbdc, int flags)
1094 {
1095         /*
1096          * Don't try to print anything in this function.  The low-level
1097          * console may not have been initialized yet...
1098          */
1099         int err;
1100         int c;
1101
1102         if (!kbdc_lock(kbdc, TRUE)) {
1103                 /* driver error? */
1104                 return ENXIO;
1105         }
1106
1107         /*
1108          * XXX block data transmission from the keyboard.  This can cause
1109          * the keyboard to stop sending keystrokes even when re-enabled
1110          * under certain circumstances if not followed by a full reset.
1111          */
1112         write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT);
1113
1114         /* flush any noise in the buffer */
1115         empty_both_buffers(kbdc, 100);
1116
1117         /* save the current keyboard controller command byte */
1118         c = get_controller_command_byte(kbdc);
1119         if (c == -1) {
1120                 /* CONTROLLER ERROR */
1121                 kbdc_lock(kbdc, FALSE);
1122                 return ENXIO;
1123         }
1124
1125         /*
1126          * The keyboard may have been screwed up by the boot block.
1127          * We may just be able to recover from error by testing the controller
1128          * and the keyboard port. The controller command byte needs to be
1129          * saved before this recovery operation, as some controllers seem
1130          * to set the command byte to particular values.
1131          */
1132         test_controller(kbdc);
1133         test_kbd_port(kbdc);
1134
1135         err = get_kbd_echo(kbdc);
1136
1137         /*
1138          * Even if the keyboard doesn't seem to be present (err != 0),
1139          * we shall enable the keyboard port and interrupt so that
1140          * the driver will be operable when the keyboard is attached
1141          * to the system later.  It is NOT recommended to hot-plug
1142          * the AT keyboard, but many people do so...
1143          */
1144         setup_kbd_port(kbdc, TRUE, TRUE);
1145 #if 0
1146         if (err) {
1147                 /* try to restore the command byte as before */
1148                 set_controller_command_byte(kbdc, KBD_KBD_CONTROL_BITS, c);
1149         }
1150 #endif
1151
1152         kbdc_lock(kbdc, FALSE);
1153         return err;
1154 }
1155
1156 static int
1157 init_keyboard(KBDC kbdc, int *type, int flags)
1158 {
1159         int codeset;
1160         int id;
1161         int c;
1162         int mux_version;
1163         int mux_mask;
1164         int mux_val;
1165
1166         if (!kbdc_lock(kbdc, TRUE)) {
1167                 /* driver error? */
1168                 return EIO;
1169         }
1170
1171         /*
1172          * XXX block data transmission from the keyboard.  This can cause
1173          * the keyboard to stop sending keystrokes even when re-enabled
1174          * under certain circumstances if not followed by a full reset.
1175          */
1176         write_controller_command(kbdc, KBDC_DISABLE_KBD_PORT);
1177
1178 #if 0
1179         if (atkbd_setmuxmode(kbdc, 1, &mux_version)) {
1180                 kprintf("atkbd: no mux\n");
1181                 mux_version = -1;
1182         } else {
1183                 kprintf("atkbd: mux present version %d\n", mux_version);
1184         }
1185 #else
1186         mux_version = -1;
1187 #endif
1188
1189         /* save the current controller command byte */
1190         empty_both_buffers(kbdc, 200);
1191         c = get_controller_command_byte(kbdc);
1192         if (c == -1) {
1193                 /* CONTROLLER ERROR */
1194                 kbdc_lock(kbdc, FALSE);
1195                 kprintf("atkbd: unable to get the current command byte value.\n");
1196                 return EIO;
1197         }
1198         if (bootverbose)
1199                 kprintf("atkbd: the current kbd controller command byte %04x\n",
1200                        c);
1201 #if 0
1202         /* override the keyboard lock switch */
1203         c |= KBD_OVERRIDE_KBD_LOCK;
1204 #endif
1205
1206         /* enable the keyboard port, but disable the keyboard intr. */
1207         if (setup_kbd_port(kbdc, TRUE, FALSE)) {
1208                 /* CONTROLLER ERROR: there is very little we can do... */
1209                 kprintf("atkbd: unable to set the command byte.\n");
1210                 kbdc_lock(kbdc, FALSE);
1211                 return EIO;
1212         }
1213
1214         /* default codeset */
1215         codeset = -1;
1216
1217         /* reset keyboard hardware */
1218         if (!(flags & KB_CONF_NO_RESET) && !reset_kbd(kbdc)) {
1219                 /*
1220                  * KEYBOARD ERROR
1221                  * Keyboard reset may fail either because the keyboard
1222                  * doen't exist, or because the keyboard doesn't pass
1223                  * the self-test, or the keyboard controller on the
1224                  * motherboard and the keyboard somehow fail to shake hands.
1225                  * It is just possible, particularly in the last case,
1226                  * that the keyoard controller may be left in a hung state.
1227                  * test_controller() and test_kbd_port() appear to bring
1228                  * the keyboard controller back (I don't know why and how,
1229                  * though.)
1230                  */
1231                 empty_both_buffers(kbdc, 10);
1232                 test_controller(kbdc);
1233                 test_kbd_port(kbdc);
1234                 /*
1235                  * We could disable the keyboard port and interrupt... but,
1236                  * the keyboard may still exist (see above).
1237                  */
1238                 set_controller_command_byte(kbdc, KBD_KBD_CONTROL_BITS, c);
1239                 kbdc_lock(kbdc, FALSE);
1240                 if (bootverbose)
1241                         kprintf("atkbd: failed to reset the keyboard.\n");
1242                 return EIO;
1243         }
1244
1245         /*
1246          * Check if we have an XT keyboard before we attempt to reset it.
1247          * The procedure assumes that the keyboard and the controller have
1248          * been set up properly by BIOS and have not been messed up
1249          * during the boot process.
1250          */
1251         codeset = -1;
1252         if (flags & KB_CONF_ALT_SCANCODESET)
1253                 /* the user says there is a XT keyboard */
1254                 codeset = 1;
1255 #ifdef KBD_DETECT_XT_KEYBOARD
1256         else if ((c & KBD_TRANSLATION) == 0) {
1257                 /* SET_SCANCODE_SET is not always supported; ignore error */
1258                 if (send_kbd_command_and_data(kbdc, KBDC_SET_SCANCODE_SET, 0)
1259                         == KBD_ACK)
1260                         codeset = read_kbd_data(kbdc);
1261         }
1262 #endif /* KBD_DETECT_XT_KEYBOARD */
1263         if (bootverbose)
1264                 kprintf("atkbd: scancode set %d\n", codeset);
1265
1266         /*
1267          * Get the keyboard id.
1268          */
1269         *type = KB_OTHER;
1270         id = get_kbd_id(kbdc, ATKBD_CMD_GETID);
1271         switch(id) {
1272         case 0x41ab:    /* 101/102/... Enhanced */
1273         case 0x83ab:    /* ditto */
1274         case 0x54ab:    /* SpaceSaver */
1275         case 0x84ab:    /* ditto */
1276 #if 0
1277         case 0x90ab:    /* 'G' */
1278         case 0x91ab:    /* 'P' */
1279         case 0x92ab:    /* 'A' */
1280 #endif
1281                 *type = KB_101;
1282                 break;
1283         case -1:        /* AT 84 keyboard doesn't return ID */
1284                 *type = KB_84;
1285                 break;
1286         default:
1287                 break;
1288         }
1289         if (bootverbose)
1290                 kprintf("atkbd: keyboard ID 0x%x (%d)\n", id, *type);
1291
1292         /*
1293          * Allow us to set the XT_KEYBD flag in UserConfig so that keyboards
1294          * such as those on the IBM ThinkPad laptop computers can be used
1295          * with the standard console driver.
1296          */
1297         if (codeset == 1) {
1298                 if (send_kbd_command_and_data(kbdc,
1299                         KBDC_SET_SCANCODE_SET, codeset) == KBD_ACK) {
1300                         /* XT kbd doesn't need scan code translation */
1301                         c &= ~KBD_TRANSLATION;
1302                 } else {
1303                         /*
1304                          * KEYBOARD ERROR
1305                          * The XT kbd isn't usable unless the proper scan
1306                          * code set is selected.
1307                          */
1308                         set_controller_command_byte(kbdc,
1309                                                     KBD_KBD_CONTROL_BITS, c);
1310                         kbdc_lock(kbdc, FALSE);
1311                         kprintf("atkbd: unable to set the XT keyboard mode.\n");
1312                         return EIO;
1313                 }
1314         }
1315
1316 #if 0
1317         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_EX_ENABLE, 0x71) != KBD_ACK)
1318                 kprintf("atkbd: can't CMD_EX_ENABLE\n");
1319
1320         if (send_kbd_command(kbdc, ATKBD_CMD_SETALL_MB) != KBD_ACK)
1321                 kprintf("atkbd: can't SETALL_MB\n");
1322         if (send_kbd_command(kbdc, ATKBD_CMD_SETALL_MBR) != KBD_ACK)
1323                 kprintf("atkbd: can't SETALL_MBR\n");
1324 #endif
1325 #if 0
1326         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_SSCANSET, 2) != KBD_ACK)
1327                 kprintf("atkbd: can't SSCANSET\n");
1328         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_GSCANSET, 0) != KBD_ACK)
1329                 kprintf("atkbd: can't SSCANSET\n");
1330         else
1331                 kprintf("atkbd: scanset %d\n", read_kbd_data(kbdc));
1332 #endif
1333 #if 0
1334         kprintf("atkbd: id %04x\n", get_kbd_id(kbdc, ATKBD_CMD_OK_GETID));
1335         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_SETLEDS, 0) != KBD_ACK)
1336                 kprintf("atkbd: setleds failed\n");
1337         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_SETREP, 255) != KBD_ACK)
1338                 kprintf("atkbd: setrep failed\n");
1339         if (send_kbd_command(kbdc, ATKBD_CMD_RESEND) != KBD_ACK)
1340                 kprintf("atkbd: resend failed\n");
1341 #endif
1342         /*
1343          * Some keyboards require a SETLEDS command to be sent after
1344          * the reset command before they will send keystrokes to us
1345          * (Acer C720).
1346          */
1347         if (send_kbd_command_and_data(kbdc, ATKBD_CMD_SETLEDS, 0) != KBD_ACK)
1348                 kprintf("atkbd: setleds failed\n");
1349         send_kbd_command(kbdc, ATKBD_CMD_ENABLE);
1350
1351 #if 0
1352         /* DEBUGGING */
1353         {
1354                 int retry;
1355                 int c;
1356                 kprintf("atkbd: waiting for keypress");
1357                 for (retry = 0; retry < 10; ++retry) {
1358                         c = read_kbd_data_no_wait(kbdc);
1359                         kprintf(" %d", c);
1360                         tsleep(&c, 0, "wait", hz);
1361                 }
1362                 kprintf("\n");
1363         }
1364 #endif
1365
1366         if (mux_version == -1) {
1367                 mux_mask = 0;
1368                 mux_val = 0;
1369         } else {
1370                 mux_mask = KBD_AUX_CONTROL_BITS;
1371                 mux_val = 0;
1372                 kprintf("atkbd: setaux for multiplexer\n");
1373         }
1374
1375         /* enable the keyboard port and intr. */
1376         if (!set_controller_command_byte(kbdc,
1377                 KBD_KBD_CONTROL_BITS | KBD_TRANSLATION |
1378                 KBD_OVERRIDE_KBD_LOCK | mux_mask,
1379                 (c & (KBD_TRANSLATION | KBD_OVERRIDE_KBD_LOCK))
1380                     | KBD_ENABLE_KBD_PORT | KBD_ENABLE_KBD_INT | mux_val)) {
1381                 /*
1382                  * CONTROLLER ERROR
1383                  * This is serious; we are left with the disabled
1384                  * keyboard intr.
1385                  */
1386                 set_controller_command_byte(kbdc,
1387                                 KBD_KBD_CONTROL_BITS | KBD_TRANSLATION |
1388                                 KBD_OVERRIDE_KBD_LOCK | mux_mask,
1389                                 c);
1390                 kbdc_lock(kbdc, FALSE);
1391                 kprintf("atkbd: unable to enable the keyboard port and intr.\n");
1392                 return EIO;
1393         }
1394
1395         kbdc_lock(kbdc, FALSE);
1396         return 0;
1397 }
1398
1399 #if 0
1400
1401 static
1402 int
1403 atkbd_setmuxmode(KBDC kbdc, int enable, int *mux_version)
1404 {
1405         int param;
1406         int val;
1407         int i;
1408
1409         kbdc->mux_active = 0;
1410         empty_both_buffers(kbdc, 100);
1411         val = 0xf0;
1412         if ((param = write_controller_w1r1(kbdc, KBDC_AUX_LOOP, val)) != val) {
1413                 kprintf("setmuxmode: fail1\n");
1414                 return(-1);
1415         }
1416         val = enable ? 0x56 : 0xf6;
1417         if ((param = write_controller_w1r1(kbdc, KBDC_AUX_LOOP, val)) != val) {
1418                 kprintf("setmuxmode: fail2\n");
1419                 return(-1);
1420         }
1421         val = enable ? 0xa4 : 0xa5;
1422         if ((param = write_controller_w1r1(kbdc, KBDC_AUX_LOOP, val)) != val) {
1423                 kprintf("setmuxmode: fail3\n");
1424                 return(-1);
1425         }
1426         kprintf("mux version %02x\n", param);
1427         if (param == 0xac) {
1428                 kprintf("setmuxmode: fail4\n");
1429                 return(-1);
1430         }
1431
1432         if (enable) {
1433                 for (i = 0; i < KBD_NUM_MUX_PORTS; ++i) {
1434                         write_controller_command(kbdc, KBDC_MUX_PFX + i);
1435                         write_controller_command(kbdc, KBDC_ENABLE_AUX_PORT);
1436
1437                 }
1438         }
1439         kbdc->mux_active = 1;
1440         if (mux_version)
1441                 *mux_version = param;
1442         return 0;
1443 }
1444
1445 #endif
1446
1447 static int
1448 write_kbd(KBDC kbdc, int command, int data)
1449 {
1450     /* prevent the timeout routine from polling the keyboard */
1451     if (!kbdc_lock(kbdc, TRUE))
1452         return EBUSY;
1453
1454     /* disable the keyboard and mouse interrupt */
1455     crit_enter();
1456
1457 #if 0
1458     /*
1459      * XXX NOTE: We can't just disable the KBD port any more, even
1460      *           temporarily, without blowing up some BIOS emulations
1461      *           if not followed by a full reset.
1462      */
1463     c = get_controller_command_byte(kbdc);
1464     if ((c == -1) ||
1465         !set_controller_command_byte(kbdc,
1466                 KBD_KBD_CONTROL_BITS,
1467                 KBD_DISABLE_KBD_PORT | KBD_DISABLE_KBD_INT)) {
1468         /* CONTROLLER ERROR */
1469         kbdc_lock(kbdc, FALSE);
1470         crit_exit();
1471         return EIO;
1472     }
1473     /*
1474      * Now that the keyboard controller is told not to generate
1475      * the keyboard and mouse interrupts, call `splx()' to allow
1476      * the other tty interrupts. The clock interrupt may also occur,
1477      * but the timeout routine (`scrn_timer()') will be blocked
1478      * by the lock flag set via `kbdc_lock()'
1479      */
1480     crit_exit();
1481 #endif
1482
1483     if (send_kbd_command_and_data(kbdc, command, data) != KBD_ACK)
1484         send_kbd_command(kbdc, KBDC_ENABLE_KBD);
1485
1486 #if 0
1487     /* restore the interrupts */
1488     if (!set_controller_command_byte(kbdc, KBD_KBD_CONTROL_BITS, c)) {
1489         /* CONTROLLER ERROR */
1490     }
1491 #else
1492     crit_exit();
1493 #endif
1494     kbdc_lock(kbdc, FALSE);
1495
1496     return 0;
1497 }
1498
1499 static int
1500 get_kbd_id(KBDC kbdc, int cmd)
1501 {
1502         int id1, id2;
1503
1504         empty_both_buffers(kbdc, 10);
1505         id1 = id2 = -1;
1506         if (send_kbd_command(kbdc, cmd) != KBD_ACK)
1507                 return -1;
1508
1509         DELAY(10000);   /* 10 msec delay */
1510         id1 = read_kbd_data(kbdc);
1511         if (id1 != -1)
1512                 id2 = read_kbd_data(kbdc);
1513
1514         if ((id1 == -1) || (id2 == -1)) {
1515                 empty_both_buffers(kbdc, 10);
1516                 test_controller(kbdc);
1517                 test_kbd_port(kbdc);
1518                 return -1;
1519         }
1520         return ((id2 << 8) | id1);
1521 }
1522
1523 static int delays[] = { 250, 500, 750, 1000 };
1524 static int rates[] = {  34,  38,  42,  46,  50,  55,  59,  63,
1525                         68,  76,  84,  92, 100, 110, 118, 126,
1526                        136, 152, 168, 184, 200, 220, 236, 252,
1527                        272, 304, 336, 368, 400, 440, 472, 504 };
1528
1529 static int
1530 typematic_delay(int i)
1531 {
1532         return delays[(i >> 5) & 3];
1533 }
1534
1535 static int
1536 typematic_rate(int i)
1537 {
1538         return rates[i & 0x1f];
1539 }
1540
1541 static int
1542 typematic(int delay, int rate)
1543 {
1544         int value;
1545         int i;
1546
1547         for (i = NELEM(delays) - 1; i > 0; --i) {
1548                 if (delay >= delays[i])
1549                         break;
1550         }
1551         value = i << 5;
1552         for (i = NELEM(rates) - 1; i > 0; --i) {
1553                 if (rate >= rates[i])
1554                         break;
1555         }
1556         value |= i;
1557         return value;
1558 }