The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/kbd/kbd.c

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    1 /*-
    2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer as
   10  *    the first lines of this file unmodified.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  *
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
   16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   18  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   25  *
   26  */
   27 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include "opt_kbd.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/kernel.h>
   36 #include <sys/malloc.h>
   37 #include <sys/conf.h>
   38 #include <sys/fcntl.h>
   39 #include <sys/tty.h>
   40 #include <sys/poll.h>
   41 #include <sys/priv.h>
   42 #include <sys/proc.h>
   43 #include <sys/sysctl.h>
   44 #include <sys/uio.h>
   45 
   46 #include <sys/kbio.h>
   47 
   48 #include <dev/kbd/kbdreg.h>
   49 
   50 #define KBD_INDEX(dev)  minor(dev)
   51 
   52 typedef struct genkbd_softc {
   53         int             gkb_flags;      /* flag/status bits */
   54 #define KB_ASLEEP       (1 << 0)
   55         struct clist    gkb_q;          /* input queue */
   56         struct selinfo  gkb_rsel;
   57 } genkbd_softc_t;
   58 
   59 static  SLIST_HEAD(, keyboard_driver) keyboard_drivers =
   60         SLIST_HEAD_INITIALIZER(keyboard_drivers);
   61 
   62 SET_DECLARE(kbddriver_set, const keyboard_driver_t);
   63 
   64 /* local arrays */
   65 
   66 /*
   67  * We need at least one entry each in order to initialize a keyboard
   68  * for the kernel console.  The arrays will be increased dynamically
   69  * when necessary.
   70  */
   71 
   72 static int              keyboards = 1;
   73 static keyboard_t       *kbd_ini;
   74 static keyboard_t       **keyboard = &kbd_ini;
   75 static keyboard_switch_t *kbdsw_ini;
   76        keyboard_switch_t **kbdsw = &kbdsw_ini;
   77 
   78 static int keymap_restrict_change;
   79 SYSCTL_NODE(_hw, OID_AUTO, kbd, CTLFLAG_RD, 0, "kbd");
   80 SYSCTL_INT(_hw_kbd, OID_AUTO, keymap_restrict_change, CTLFLAG_RW,
   81     &keymap_restrict_change, 0, "restrict ability to change keymap");
   82 
   83 #define ARRAY_DELTA     4
   84 
   85 static int
   86 kbd_realloc_array(void)
   87 {
   88         keyboard_t **new_kbd;
   89         keyboard_switch_t **new_kbdsw;
   90         int newsize;
   91         int s;
   92 
   93         s = spltty();
   94         newsize = ((keyboards + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA;
   95         new_kbd = malloc(sizeof(*new_kbd)*newsize, M_DEVBUF, M_NOWAIT|M_ZERO);
   96         if (new_kbd == NULL) {
   97                 splx(s);
   98                 return (ENOMEM);
   99         }
  100         new_kbdsw = malloc(sizeof(*new_kbdsw)*newsize, M_DEVBUF,
  101                             M_NOWAIT|M_ZERO);
  102         if (new_kbdsw == NULL) {
  103                 free(new_kbd, M_DEVBUF);
  104                 splx(s);
  105                 return (ENOMEM);
  106         }
  107         bcopy(keyboard, new_kbd, sizeof(*keyboard)*keyboards);
  108         bcopy(kbdsw, new_kbdsw, sizeof(*kbdsw)*keyboards);
  109         if (keyboards > 1) {
  110                 free(keyboard, M_DEVBUF);
  111                 free(kbdsw, M_DEVBUF);
  112         }
  113         keyboard = new_kbd;
  114         kbdsw = new_kbdsw;
  115         keyboards = newsize;
  116         splx(s);
  117 
  118         if (bootverbose)
  119                 printf("kbd: new array size %d\n", keyboards);
  120 
  121         return (0);
  122 }
  123 
  124 /*
  125  * Low-level keyboard driver functions
  126  * Keyboard subdrivers, such as the AT keyboard driver and the USB keyboard
  127  * driver, call these functions to initialize the keyboard_t structure
  128  * and register it to the virtual keyboard driver `kbd'.
  129  */
  130 
  131 /* initialize the keyboard_t structure */
  132 void
  133 kbd_init_struct(keyboard_t *kbd, char *name, int type, int unit, int config,
  134                 int port, int port_size)
  135 {
  136         kbd->kb_flags = KB_NO_DEVICE;   /* device has not been found */
  137         kbd->kb_name = name;
  138         kbd->kb_type = type;
  139         kbd->kb_unit = unit;
  140         kbd->kb_config = config & ~KB_CONF_PROBE_ONLY;
  141         kbd->kb_led = 0;                /* unknown */
  142         kbd->kb_io_base = port;
  143         kbd->kb_io_size = port_size;
  144         kbd->kb_data = NULL;
  145         kbd->kb_keymap = NULL;
  146         kbd->kb_accentmap = NULL;
  147         kbd->kb_fkeytab = NULL;
  148         kbd->kb_fkeytab_size = 0;
  149         kbd->kb_delay1 = KB_DELAY1;     /* these values are advisory only */
  150         kbd->kb_delay2 = KB_DELAY2;
  151         kbd->kb_count = 0L;
  152         bzero(kbd->kb_lastact, sizeof(kbd->kb_lastact));
  153 }
  154 
  155 void
  156 kbd_set_maps(keyboard_t *kbd, keymap_t *keymap, accentmap_t *accmap,
  157              fkeytab_t *fkeymap, int fkeymap_size)
  158 {
  159         kbd->kb_keymap = keymap;
  160         kbd->kb_accentmap = accmap;
  161         kbd->kb_fkeytab = fkeymap;
  162         kbd->kb_fkeytab_size = fkeymap_size;
  163 }
  164 
  165 /* declare a new keyboard driver */
  166 int
  167 kbd_add_driver(keyboard_driver_t *driver)
  168 {
  169         if (SLIST_NEXT(driver, link))
  170                 return (EINVAL);
  171         SLIST_INSERT_HEAD(&keyboard_drivers, driver, link);
  172         return (0);
  173 }
  174 
  175 int
  176 kbd_delete_driver(keyboard_driver_t *driver)
  177 {
  178         SLIST_REMOVE(&keyboard_drivers, driver, keyboard_driver, link);
  179         SLIST_NEXT(driver, link) = NULL;
  180         return (0);
  181 }
  182 
  183 /* register a keyboard and associate it with a function table */
  184 int
  185 kbd_register(keyboard_t *kbd)
  186 {
  187         const keyboard_driver_t **list;
  188         const keyboard_driver_t *p;
  189         keyboard_t *mux;
  190         keyboard_info_t ki;
  191         int index;
  192 
  193         mux = kbd_get_keyboard(kbd_find_keyboard("kbdmux", -1));
  194 
  195         for (index = 0; index < keyboards; ++index) {
  196                 if (keyboard[index] == NULL)
  197                         break;
  198         }
  199         if (index >= keyboards) {
  200                 if (kbd_realloc_array())
  201                         return (-1);
  202         }
  203 
  204         kbd->kb_index = index;
  205         KBD_UNBUSY(kbd);
  206         KBD_VALID(kbd);
  207         kbd->kb_active = 0;     /* disabled until someone calls kbd_enable() */
  208         kbd->kb_token = NULL;
  209         kbd->kb_callback.kc_func = NULL;
  210         kbd->kb_callback.kc_arg = NULL;
  211 
  212         SLIST_FOREACH(p, &keyboard_drivers, link) {
  213                 if (strcmp(p->name, kbd->kb_name) == 0) {
  214                         keyboard[index] = kbd;
  215                         kbdsw[index] = p->kbdsw;
  216 
  217                         if (mux != NULL) {
  218                                 bzero(&ki, sizeof(ki));
  219                                 strcpy(ki.kb_name, kbd->kb_name);
  220                                 ki.kb_unit = kbd->kb_unit;
  221 
  222                                 (*kbdsw[mux->kb_index]->ioctl)
  223                                         (mux, KBADDKBD, (caddr_t) &ki);
  224                         }
  225 
  226                         return (index);
  227                 }
  228         }
  229         SET_FOREACH(list, kbddriver_set) {
  230                 p = *list;
  231                 if (strcmp(p->name, kbd->kb_name) == 0) {
  232                         keyboard[index] = kbd;
  233                         kbdsw[index] = p->kbdsw;
  234 
  235                         if (mux != NULL) {
  236                                 bzero(&ki, sizeof(ki));
  237                                 strcpy(ki.kb_name, kbd->kb_name);
  238                                 ki.kb_unit = kbd->kb_unit;
  239 
  240                                 (*kbdsw[mux->kb_index]->ioctl)
  241                                         (mux, KBADDKBD, (caddr_t) &ki);
  242                         }
  243 
  244                         return (index);
  245                 }
  246         }
  247 
  248         return (-1);
  249 }
  250 
  251 int
  252 kbd_unregister(keyboard_t *kbd)
  253 {
  254         int error;
  255         int s;
  256 
  257         if ((kbd->kb_index < 0) || (kbd->kb_index >= keyboards))
  258                 return (ENOENT);
  259         if (keyboard[kbd->kb_index] != kbd)
  260                 return (ENOENT);
  261 
  262         s = spltty();
  263         if (KBD_IS_BUSY(kbd)) {
  264                 error = (*kbd->kb_callback.kc_func)(kbd, KBDIO_UNLOADING,
  265                     kbd->kb_callback.kc_arg);
  266                 if (error) {
  267                         splx(s);
  268                         return (error);
  269                 }
  270                 if (KBD_IS_BUSY(kbd)) {
  271                         splx(s);
  272                         return (EBUSY);
  273                 }
  274         }
  275         KBD_INVALID(kbd);
  276         keyboard[kbd->kb_index] = NULL;
  277         kbdsw[kbd->kb_index] = NULL;
  278 
  279         splx(s);
  280         return (0);
  281 }
  282 
  283 /* find a funciton table by the driver name */
  284 keyboard_switch_t
  285 *kbd_get_switch(char *driver)
  286 {
  287         const keyboard_driver_t **list;
  288         const keyboard_driver_t *p;
  289 
  290         SLIST_FOREACH(p, &keyboard_drivers, link) {
  291                 if (strcmp(p->name, driver) == 0)
  292                         return (p->kbdsw);
  293         }
  294         SET_FOREACH(list, kbddriver_set) {
  295                 p = *list;
  296                 if (strcmp(p->name, driver) == 0)
  297                         return (p->kbdsw);
  298         }
  299 
  300         return (NULL);
  301 }
  302 
  303 /*
  304  * Keyboard client functions
  305  * Keyboard clients, such as the console driver `syscons' and the keyboard
  306  * cdev driver, use these functions to claim and release a keyboard for
  307  * exclusive use.
  308  */
  309 
  310 /*
  311  * find the keyboard specified by a driver name and a unit number
  312  * starting at given index
  313  */
  314 int
  315 kbd_find_keyboard2(char *driver, int unit, int index)
  316 {
  317         int i;
  318 
  319         if ((index < 0) || (index >= keyboards))
  320                 return (-1);
  321 
  322         for (i = index; i < keyboards; ++i) {
  323                 if (keyboard[i] == NULL)
  324                         continue;
  325                 if (!KBD_IS_VALID(keyboard[i]))
  326                         continue;
  327                 if (strcmp("*", driver) && strcmp(keyboard[i]->kb_name, driver))
  328                         continue;
  329                 if ((unit != -1) && (keyboard[i]->kb_unit != unit))
  330                         continue;
  331                 return (i);
  332         }
  333 
  334         return (-1);
  335 }
  336 
  337 /* find the keyboard specified by a driver name and a unit number */
  338 int
  339 kbd_find_keyboard(char *driver, int unit)
  340 {
  341         return (kbd_find_keyboard2(driver, unit, 0));
  342 }
  343 
  344 /* allocate a keyboard */
  345 int
  346 kbd_allocate(char *driver, int unit, void *id, kbd_callback_func_t *func,
  347              void *arg)
  348 {
  349         int index;
  350         int s;
  351 
  352         if (func == NULL)
  353                 return (-1);
  354 
  355         s = spltty();
  356         index = kbd_find_keyboard(driver, unit);
  357         if (index >= 0) {
  358                 if (KBD_IS_BUSY(keyboard[index])) {
  359                         splx(s);
  360                         return (-1);
  361                 }
  362                 keyboard[index]->kb_token = id;
  363                 KBD_BUSY(keyboard[index]);
  364                 keyboard[index]->kb_callback.kc_func = func;
  365                 keyboard[index]->kb_callback.kc_arg = arg;
  366                 (*kbdsw[index]->clear_state)(keyboard[index]);
  367         }
  368         splx(s);
  369         return (index);
  370 }
  371 
  372 int
  373 kbd_release(keyboard_t *kbd, void *id)
  374 {
  375         int error;
  376         int s;
  377 
  378         s = spltty();
  379         if (!KBD_IS_VALID(kbd) || !KBD_IS_BUSY(kbd)) {
  380                 error = EINVAL;
  381         } else if (kbd->kb_token != id) {
  382                 error = EPERM;
  383         } else {
  384                 kbd->kb_token = NULL;
  385                 KBD_UNBUSY(kbd);
  386                 kbd->kb_callback.kc_func = NULL;
  387                 kbd->kb_callback.kc_arg = NULL;
  388                 (*kbdsw[kbd->kb_index]->clear_state)(kbd);
  389                 error = 0;
  390         }
  391         splx(s);
  392         return (error);
  393 }
  394 
  395 int
  396 kbd_change_callback(keyboard_t *kbd, void *id, kbd_callback_func_t *func,
  397                     void *arg)
  398 {
  399         int error;
  400         int s;
  401 
  402         s = spltty();
  403         if (!KBD_IS_VALID(kbd) || !KBD_IS_BUSY(kbd)) {
  404                 error = EINVAL;
  405         } else if (kbd->kb_token != id) {
  406                 error = EPERM;
  407         } else if (func == NULL) {
  408                 error = EINVAL;
  409         } else {
  410                 kbd->kb_callback.kc_func = func;
  411                 kbd->kb_callback.kc_arg = arg;
  412                 error = 0;
  413         }
  414         splx(s);
  415         return (error);
  416 }
  417 
  418 /* get a keyboard structure */
  419 keyboard_t
  420 *kbd_get_keyboard(int index)
  421 {
  422         if ((index < 0) || (index >= keyboards))
  423                 return (NULL);
  424         if (keyboard[index] == NULL)
  425                 return (NULL);
  426         if (!KBD_IS_VALID(keyboard[index]))
  427                 return (NULL);
  428         return (keyboard[index]);
  429 }
  430 
  431 /*
  432  * The back door for the console driver; configure keyboards
  433  * This function is for the kernel console to initialize keyboards
  434  * at very early stage.
  435  */
  436 
  437 int
  438 kbd_configure(int flags)
  439 {
  440         const keyboard_driver_t **list;
  441         const keyboard_driver_t *p;
  442 
  443         SLIST_FOREACH(p, &keyboard_drivers, link) {
  444                 if (p->configure != NULL)
  445                         (*p->configure)(flags);
  446         }
  447         SET_FOREACH(list, kbddriver_set) {
  448                 p = *list;
  449                 if (p->configure != NULL)
  450                         (*p->configure)(flags);
  451         }
  452 
  453         return (0);
  454 }
  455 
  456 #ifdef KBD_INSTALL_CDEV
  457 
  458 /*
  459  * Virtual keyboard cdev driver functions
  460  * The virtual keyboard driver dispatches driver functions to
  461  * appropriate subdrivers.
  462  */
  463 
  464 #define KBD_UNIT(dev)   minor(dev)
  465 
  466 static d_open_t         genkbdopen;
  467 static d_close_t        genkbdclose;
  468 static d_read_t         genkbdread;
  469 static d_write_t        genkbdwrite;
  470 static d_ioctl_t        genkbdioctl;
  471 static d_poll_t         genkbdpoll;
  472 
  473 
  474 static struct cdevsw kbd_cdevsw = {
  475         .d_version =    D_VERSION,
  476         .d_flags =      D_NEEDGIANT,
  477         .d_open =       genkbdopen,
  478         .d_close =      genkbdclose,
  479         .d_read =       genkbdread,
  480         .d_write =      genkbdwrite,
  481         .d_ioctl =      genkbdioctl,
  482         .d_poll =       genkbdpoll,
  483         .d_name =       "kbd",
  484 };
  485 
  486 int
  487 kbd_attach(keyboard_t *kbd)
  488 {
  489 
  490         if (kbd->kb_index >= keyboards)
  491                 return (EINVAL);
  492         if (keyboard[kbd->kb_index] != kbd)
  493                 return (EINVAL);
  494 
  495         kbd->kb_dev = make_dev(&kbd_cdevsw, kbd->kb_index, UID_ROOT, GID_WHEEL,
  496             0600, "%s%r", kbd->kb_name, kbd->kb_unit);
  497         make_dev_alias(kbd->kb_dev, "kbd%r", kbd->kb_index);
  498         kbd->kb_dev->si_drv1 = malloc(sizeof(genkbd_softc_t), M_DEVBUF,
  499             M_WAITOK | M_ZERO);
  500         printf("kbd%d at %s%d\n", kbd->kb_index, kbd->kb_name, kbd->kb_unit);
  501         return (0);
  502 }
  503 
  504 int
  505 kbd_detach(keyboard_t *kbd)
  506 {
  507 
  508         if (kbd->kb_index >= keyboards)
  509                 return (EINVAL);
  510         if (keyboard[kbd->kb_index] != kbd)
  511                 return (EINVAL);
  512 
  513         free(kbd->kb_dev->si_drv1, M_DEVBUF);
  514         destroy_dev(kbd->kb_dev);
  515 
  516         return (0);
  517 }
  518 
  519 /*
  520  * Generic keyboard cdev driver functions
  521  * Keyboard subdrivers may call these functions to implement common
  522  * driver functions.
  523  */
  524 
  525 #define KB_QSIZE        512
  526 #define KB_BUFSIZE      64
  527 
  528 static kbd_callback_func_t genkbd_event;
  529 
  530 static int
  531 genkbdopen(struct cdev *dev, int mode, int flag, struct thread *td)
  532 {
  533         keyboard_t *kbd;
  534         genkbd_softc_t *sc;
  535         int s;
  536         int i;
  537 
  538         s = spltty();
  539         sc = dev->si_drv1;
  540         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  541         if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) {
  542                 splx(s);
  543                 return (ENXIO);
  544         }
  545         i = kbd_allocate(kbd->kb_name, kbd->kb_unit, sc,
  546             genkbd_event, (void *)sc);
  547         if (i < 0) {
  548                 splx(s);
  549                 return (EBUSY);
  550         }
  551         /* assert(i == kbd->kb_index) */
  552         /* assert(kbd == kbd_get_keyboard(i)) */
  553 
  554         /*
  555          * NOTE: even when we have successfully claimed a keyboard,
  556          * the device may still be missing (!KBD_HAS_DEVICE(kbd)).
  557          */
  558 
  559 #if 0
  560         bzero(&sc->gkb_q, sizeof(sc->gkb_q));
  561 #endif
  562         clist_alloc_cblocks(&sc->gkb_q, KB_QSIZE, KB_QSIZE/2); /* XXX */
  563         splx(s);
  564 
  565         return (0);
  566 }
  567 
  568 static int
  569 genkbdclose(struct cdev *dev, int mode, int flag, struct thread *td)
  570 {
  571         keyboard_t *kbd;
  572         genkbd_softc_t *sc;
  573         int s;
  574 
  575         /*
  576          * NOTE: the device may have already become invalid.
  577          * kbd == NULL || !KBD_IS_VALID(kbd)
  578          */
  579         s = spltty();
  580         sc = dev->si_drv1;
  581         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  582         if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) {
  583                 /* XXX: we shall be forgiving and don't report error... */
  584         } else {
  585                 kbd_release(kbd, (void *)sc);
  586 #if 0
  587                 clist_free_cblocks(&sc->gkb_q);
  588 #endif
  589         }
  590         splx(s);
  591         return (0);
  592 }
  593 
  594 static int
  595 genkbdread(struct cdev *dev, struct uio *uio, int flag)
  596 {
  597         keyboard_t *kbd;
  598         genkbd_softc_t *sc;
  599         u_char buffer[KB_BUFSIZE];
  600         int len;
  601         int error;
  602         int s;
  603 
  604         /* wait for input */
  605         s = spltty();
  606         sc = dev->si_drv1;
  607         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  608         if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) {
  609                 splx(s);
  610                 return (ENXIO);
  611         }
  612         while (sc->gkb_q.c_cc == 0) {
  613                 if (flag & O_NONBLOCK) {
  614                         splx(s);
  615                         return (EWOULDBLOCK);
  616                 }
  617                 sc->gkb_flags |= KB_ASLEEP;
  618                 error = tsleep(sc, PZERO | PCATCH, "kbdrea", 0);
  619                 kbd = kbd_get_keyboard(KBD_INDEX(dev));
  620                 if ((kbd == NULL) || !KBD_IS_VALID(kbd)) {
  621                         splx(s);
  622                         return (ENXIO); /* our keyboard has gone... */
  623                 }
  624                 if (error) {
  625                         sc->gkb_flags &= ~KB_ASLEEP;
  626                         splx(s);
  627                         return (error);
  628                 }
  629         }
  630         splx(s);
  631 
  632         /* copy as much input as possible */
  633         error = 0;
  634         while (uio->uio_resid > 0) {
  635                 len = imin(uio->uio_resid, sizeof(buffer));
  636                 len = q_to_b(&sc->gkb_q, buffer, len);
  637                 if (len <= 0)
  638                         break;
  639                 error = uiomove(buffer, len, uio);
  640                 if (error)
  641                         break;
  642         }
  643 
  644         return (error);
  645 }
  646 
  647 static int
  648 genkbdwrite(struct cdev *dev, struct uio *uio, int flag)
  649 {
  650         keyboard_t *kbd;
  651 
  652         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  653         if ((kbd == NULL) || !KBD_IS_VALID(kbd))
  654                 return (ENXIO);
  655         return (ENODEV);
  656 }
  657 
  658 static int
  659 genkbdioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *td)
  660 {
  661         keyboard_t *kbd;
  662         int error;
  663 
  664         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  665         if ((kbd == NULL) || !KBD_IS_VALID(kbd))
  666                 return (ENXIO);
  667         error = (*kbdsw[kbd->kb_index]->ioctl)(kbd, cmd, arg);
  668         if (error == ENOIOCTL)
  669                 error = ENODEV;
  670         return (error);
  671 }
  672 
  673 static int
  674 genkbdpoll(struct cdev *dev, int events, struct thread *td)
  675 {
  676         keyboard_t *kbd;
  677         genkbd_softc_t *sc;
  678         int revents;
  679         int s;
  680 
  681         revents = 0;
  682         s = spltty();
  683         sc = dev->si_drv1;
  684         kbd = kbd_get_keyboard(KBD_INDEX(dev));
  685         if ((sc == NULL) || (kbd == NULL) || !KBD_IS_VALID(kbd)) {
  686                 revents =  POLLHUP;     /* the keyboard has gone */
  687         } else if (events & (POLLIN | POLLRDNORM)) {
  688                 if (sc->gkb_q.c_cc > 0)
  689                         revents = events & (POLLIN | POLLRDNORM);
  690                 else
  691                         selrecord(td, &sc->gkb_rsel);
  692         }
  693         splx(s);
  694         return (revents);
  695 }
  696 
  697 static int
  698 genkbd_event(keyboard_t *kbd, int event, void *arg)
  699 {
  700         genkbd_softc_t *sc;
  701         size_t len;
  702         u_char *cp;
  703         int mode;
  704         int c;
  705 
  706         /* assert(KBD_IS_VALID(kbd)) */
  707         sc = (genkbd_softc_t *)arg;
  708 
  709         switch (event) {
  710         case KBDIO_KEYINPUT:
  711                 break;
  712         case KBDIO_UNLOADING:
  713                 /* the keyboard is going... */
  714                 kbd_release(kbd, (void *)sc);
  715                 if (sc->gkb_flags & KB_ASLEEP) {
  716                         sc->gkb_flags &= ~KB_ASLEEP;
  717                         wakeup(sc);
  718                 }
  719                 selwakeuppri(&sc->gkb_rsel, PZERO);
  720                 return (0);
  721         default:
  722                 return (EINVAL);
  723         }
  724 
  725         /* obtain the current key input mode */
  726         if ((*kbdsw[kbd->kb_index]->ioctl)(kbd, KDGKBMODE, (caddr_t)&mode))
  727                 mode = K_XLATE;
  728 
  729         /* read all pending input */
  730         while ((*kbdsw[kbd->kb_index]->check_char)(kbd)) {
  731                 c = (*kbdsw[kbd->kb_index]->read_char)(kbd, FALSE);
  732                 if (c == NOKEY)
  733                         continue;
  734                 if (c == ERRKEY)        /* XXX: ring bell? */
  735                         continue;
  736                 if (!KBD_IS_BUSY(kbd))
  737                         /* the device is not open, discard the input */
  738                         continue;
  739 
  740                 /* store the byte as is for K_RAW and K_CODE modes */
  741                 if (mode != K_XLATE) {
  742                         putc(KEYCHAR(c), &sc->gkb_q);
  743                         continue;
  744                 }
  745 
  746                 /* K_XLATE */
  747                 if (c & RELKEY) /* key release is ignored */
  748                         continue;
  749 
  750                 /* process special keys; most of them are just ignored... */
  751                 if (c & SPCLKEY) {
  752                         switch (KEYCHAR(c)) {
  753                         default:
  754                                 /* ignore them... */
  755                                 continue;
  756                         case BTAB:      /* a backtab: ESC [ Z */
  757                                 putc(0x1b, &sc->gkb_q);
  758                                 putc('[', &sc->gkb_q);
  759                                 putc('Z', &sc->gkb_q);
  760                                 continue;
  761                         }
  762                 }
  763 
  764                 /* normal chars, normal chars with the META, function keys */
  765                 switch (KEYFLAGS(c)) {
  766                 case 0:                 /* a normal char */
  767                         putc(KEYCHAR(c), &sc->gkb_q);
  768                         break;
  769                 case MKEY:              /* the META flag: prepend ESC */
  770                         putc(0x1b, &sc->gkb_q);
  771                         putc(KEYCHAR(c), &sc->gkb_q);
  772                         break;
  773                 case FKEY | SPCLKEY:    /* a function key, return string */
  774                         cp = (*kbdsw[kbd->kb_index]->get_fkeystr)(kbd,
  775                             KEYCHAR(c), &len);
  776                         if (cp != NULL) {
  777                                 while (len-- >  0)
  778                                         putc(*cp++, &sc->gkb_q);
  779                         }
  780                         break;
  781                 }
  782         }
  783 
  784         /* wake up sleeping/polling processes */
  785         if (sc->gkb_q.c_cc > 0) {
  786                 if (sc->gkb_flags & KB_ASLEEP) {
  787                         sc->gkb_flags &= ~KB_ASLEEP;
  788                         wakeup(sc);
  789                 }
  790                 selwakeuppri(&sc->gkb_rsel, PZERO);
  791         }
  792 
  793         return (0);
  794 }
  795 
  796 #endif /* KBD_INSTALL_CDEV */
  797 
  798 /*
  799  * Generic low-level keyboard functions
  800  * The low-level functions in the keyboard subdriver may use these
  801  * functions.
  802  */
  803 
  804 #ifndef KBD_DISABLE_KEYMAP_LOAD
  805 static int key_change_ok(struct keyent_t *, struct keyent_t *, struct thread *);
  806 static int keymap_change_ok(keymap_t *, keymap_t *, struct thread *);
  807 static int accent_change_ok(accentmap_t *, accentmap_t *, struct thread *);
  808 static int fkey_change_ok(fkeytab_t *, fkeyarg_t *, struct thread *);
  809 #endif
  810 
  811 int
  812 genkbd_commonioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
  813 {
  814         keyarg_t *keyp;
  815         fkeyarg_t *fkeyp;
  816         int s;
  817         int i;
  818 #ifndef KBD_DISABLE_KEYMAP_LOAD
  819         int error;
  820 #endif
  821 
  822         s = spltty();
  823         switch (cmd) {
  824 
  825         case KDGKBINFO:         /* get keyboard information */
  826                 ((keyboard_info_t *)arg)->kb_index = kbd->kb_index;
  827                 i = imin(strlen(kbd->kb_name) + 1,
  828                     sizeof(((keyboard_info_t *)arg)->kb_name));
  829                 bcopy(kbd->kb_name, ((keyboard_info_t *)arg)->kb_name, i);
  830                 ((keyboard_info_t *)arg)->kb_unit = kbd->kb_unit;
  831                 ((keyboard_info_t *)arg)->kb_type = kbd->kb_type;
  832                 ((keyboard_info_t *)arg)->kb_config = kbd->kb_config;
  833                 ((keyboard_info_t *)arg)->kb_flags = kbd->kb_flags;
  834                 break;
  835 
  836         case KDGKBTYPE:         /* get keyboard type */
  837                 *(int *)arg = kbd->kb_type;
  838                 break;
  839 
  840         case KDGETREPEAT:       /* get keyboard repeat rate */
  841                 ((int *)arg)[0] = kbd->kb_delay1;
  842                 ((int *)arg)[1] = kbd->kb_delay2;
  843                 break;
  844 
  845         case GIO_KEYMAP:        /* get keyboard translation table */
  846                 bcopy(kbd->kb_keymap, arg, sizeof(*kbd->kb_keymap));
  847                 break;
  848         case PIO_KEYMAP:        /* set keyboard translation table */
  849 #ifndef KBD_DISABLE_KEYMAP_LOAD
  850                 error = keymap_change_ok(kbd->kb_keymap, (keymap_t *)arg,
  851                     curthread);
  852                 if (error != 0) {
  853                         splx(s);
  854                         return (error);
  855                 }
  856                 bzero(kbd->kb_accentmap, sizeof(*kbd->kb_accentmap));
  857                 bcopy(arg, kbd->kb_keymap, sizeof(*kbd->kb_keymap));
  858                 break;
  859 #else
  860                 splx(s);
  861                 return (ENODEV);
  862 #endif
  863 
  864         case GIO_KEYMAPENT:     /* get keyboard translation table entry */
  865                 keyp = (keyarg_t *)arg;
  866                 if (keyp->keynum >= sizeof(kbd->kb_keymap->key) /
  867                     sizeof(kbd->kb_keymap->key[0])) {
  868                         splx(s);
  869                         return (EINVAL);
  870                 }
  871                 bcopy(&kbd->kb_keymap->key[keyp->keynum], &keyp->key,
  872                     sizeof(keyp->key));
  873                 break;
  874         case PIO_KEYMAPENT:     /* set keyboard translation table entry */
  875 #ifndef KBD_DISABLE_KEYMAP_LOAD
  876                 keyp = (keyarg_t *)arg;
  877                 if (keyp->keynum >= sizeof(kbd->kb_keymap->key) /
  878                     sizeof(kbd->kb_keymap->key[0])) {
  879                         splx(s);
  880                         return (EINVAL);
  881                 }
  882                 error = key_change_ok(&kbd->kb_keymap->key[keyp->keynum],
  883                     &keyp->key, curthread);
  884                 if (error != 0) {
  885                         splx(s);
  886                         return (error);
  887                 }
  888                 bcopy(&keyp->key, &kbd->kb_keymap->key[keyp->keynum],
  889                     sizeof(keyp->key));
  890                 break;
  891 #else
  892                 splx(s);
  893                 return (ENODEV);
  894 #endif
  895 
  896         case GIO_DEADKEYMAP:    /* get accent key translation table */
  897                 bcopy(kbd->kb_accentmap, arg, sizeof(*kbd->kb_accentmap));
  898                 break;
  899         case PIO_DEADKEYMAP:    /* set accent key translation table */
  900 #ifndef KBD_DISABLE_KEYMAP_LOAD
  901                 error = accent_change_ok(kbd->kb_accentmap,
  902                     (accentmap_t *)arg, curthread);
  903                 if (error != 0) {
  904                         splx(s);
  905                         return (error);
  906                 }
  907                 bcopy(arg, kbd->kb_accentmap, sizeof(*kbd->kb_accentmap));
  908                 break;
  909 #else
  910                 splx(s);
  911                 return (ENODEV);
  912 #endif
  913 
  914         case GETFKEY:           /* get functionkey string */
  915                 fkeyp = (fkeyarg_t *)arg;
  916                 if (fkeyp->keynum >= kbd->kb_fkeytab_size) {
  917                         splx(s);
  918                         return (EINVAL);
  919                 }
  920                 bcopy(kbd->kb_fkeytab[fkeyp->keynum].str, fkeyp->keydef,
  921                     kbd->kb_fkeytab[fkeyp->keynum].len);
  922                 fkeyp->flen = kbd->kb_fkeytab[fkeyp->keynum].len;
  923                 break;
  924         case SETFKEY:           /* set functionkey string */
  925 #ifndef KBD_DISABLE_KEYMAP_LOAD
  926                 fkeyp = (fkeyarg_t *)arg;
  927                 if (fkeyp->keynum >= kbd->kb_fkeytab_size) {
  928                         splx(s);
  929                         return (EINVAL);
  930                 }
  931                 error = fkey_change_ok(&kbd->kb_fkeytab[fkeyp->keynum],
  932                     fkeyp, curthread);
  933                 if (error != 0) {
  934                         splx(s);
  935                         return (error);
  936                 }
  937                 kbd->kb_fkeytab[fkeyp->keynum].len = imin(fkeyp->flen, MAXFK);
  938                 bcopy(fkeyp->keydef, kbd->kb_fkeytab[fkeyp->keynum].str,
  939                     kbd->kb_fkeytab[fkeyp->keynum].len);
  940                 break;
  941 #else
  942                 splx(s);
  943                 return (ENODEV);
  944 #endif
  945 
  946         default:
  947                 splx(s);
  948                 return (ENOIOCTL);
  949         }
  950 
  951         splx(s);
  952         return (0);
  953 }
  954 
  955 #ifndef KBD_DISABLE_KEYMAP_LOAD
  956 #define RESTRICTED_KEY(key, i) \
  957         ((key->spcl & (0x80 >> i)) && \
  958                 (key->map[i] == RBT || key->map[i] == SUSP || \
  959                  key->map[i] == STBY || key->map[i] == DBG || \
  960                  key->map[i] == PNC || key->map[i] == HALT || \
  961                  key->map[i] == PDWN))
  962 
  963 static int
  964 key_change_ok(struct keyent_t *oldkey, struct keyent_t *newkey, struct thread *td)
  965 {
  966         int i;
  967 
  968         /* Low keymap_restrict_change means any changes are OK. */
  969         if (keymap_restrict_change <= 0)
  970                 return (0);
  971 
  972         /* High keymap_restrict_change means only root can change the keymap. */
  973         if (keymap_restrict_change >= 2) {
  974                 for (i = 0; i < NUM_STATES; i++)
  975                         if (oldkey->map[i] != newkey->map[i])
  976                                 return priv_check(td, PRIV_KEYBOARD);
  977                 if (oldkey->spcl != newkey->spcl)
  978                         return priv_check(td, PRIV_KEYBOARD);
  979                 if (oldkey->flgs != newkey->flgs)
  980                         return priv_check(td, PRIV_KEYBOARD);
  981                 return (0);
  982         }
  983 
  984         /* Otherwise we have to see if any special keys are being changed. */
  985         for (i = 0; i < NUM_STATES; i++) {
  986                 /*
  987                  * If either the oldkey or the newkey action is restricted
  988                  * then we must make sure that the action doesn't change.
  989                  */
  990                 if (!RESTRICTED_KEY(oldkey, i) && !RESTRICTED_KEY(newkey, i))
  991                         continue;
  992                 if ((oldkey->spcl & (0x80 >> i)) == (newkey->spcl & (0x80 >> i))
  993                     && oldkey->map[i] == newkey->map[i])
  994                         continue;
  995                 return priv_check(td, PRIV_KEYBOARD);
  996         }
  997 
  998         return (0);
  999 }
 1000 
 1001 static int
 1002 keymap_change_ok(keymap_t *oldmap, keymap_t *newmap, struct thread *td)
 1003 {
 1004         int keycode, error;
 1005 
 1006         for (keycode = 0; keycode < NUM_KEYS; keycode++) {
 1007                 if ((error = key_change_ok(&oldmap->key[keycode],
 1008                     &newmap->key[keycode], td)) != 0)
 1009                         return (error);
 1010         }
 1011         return (0);
 1012 }
 1013 
 1014 static int
 1015 accent_change_ok(accentmap_t *oldmap, accentmap_t *newmap, struct thread *td)
 1016 {
 1017         struct acc_t *oldacc, *newacc;
 1018         int accent, i;
 1019 
 1020         if (keymap_restrict_change <= 2)
 1021                 return (0);
 1022 
 1023         if (oldmap->n_accs != newmap->n_accs)
 1024                 return priv_check(td, PRIV_KEYBOARD);
 1025 
 1026         for (accent = 0; accent < oldmap->n_accs; accent++) {
 1027                 oldacc = &oldmap->acc[accent];
 1028                 newacc = &newmap->acc[accent];
 1029                 if (oldacc->accchar != newacc->accchar)
 1030                         return priv_check(td, PRIV_KEYBOARD);
 1031                 for (i = 0; i < NUM_ACCENTCHARS; ++i) {
 1032                         if (oldacc->map[i][0] != newacc->map[i][0])
 1033                                 return priv_check(td, PRIV_KEYBOARD);
 1034                         if (oldacc->map[i][0] == 0)     /* end of table */
 1035                                 break;
 1036                         if (oldacc->map[i][1] != newacc->map[i][1])
 1037                                 return priv_check(td, PRIV_KEYBOARD);
 1038                 }
 1039         }
 1040 
 1041         return (0);
 1042 }
 1043 
 1044 static int
 1045 fkey_change_ok(fkeytab_t *oldkey, fkeyarg_t *newkey, struct thread *td)
 1046 {
 1047         if (keymap_restrict_change <= 3)
 1048                 return (0);
 1049 
 1050         if (oldkey->len != newkey->flen ||
 1051             bcmp(oldkey->str, newkey->keydef, oldkey->len) != 0)
 1052                 return priv_check(td, PRIV_KEYBOARD);
 1053 
 1054         return (0);
 1055 }
 1056 #endif
 1057 
 1058 /* get a pointer to the string associated with the given function key */
 1059 u_char
 1060 *genkbd_get_fkeystr(keyboard_t *kbd, int fkey, size_t *len)
 1061 {
 1062         if (kbd == NULL)
 1063                 return (NULL);
 1064         fkey -= F_FN;
 1065         if (fkey > kbd->kb_fkeytab_size)
 1066                 return (NULL);
 1067         *len = kbd->kb_fkeytab[fkey].len;
 1068         return (kbd->kb_fkeytab[fkey].str);
 1069 }
 1070 
 1071 /* diagnostic dump */
 1072 static char
 1073 *get_kbd_type_name(int type)
 1074 {
 1075         static struct {
 1076                 int type;
 1077                 char *name;
 1078         } name_table[] = {
 1079                 { KB_84,        "AT 84" },
 1080                 { KB_101,       "AT 101/102" },
 1081                 { KB_OTHER,     "generic" },
 1082         };
 1083         int i;
 1084 
 1085         for (i = 0; i < sizeof(name_table)/sizeof(name_table[0]); ++i) {
 1086                 if (type == name_table[i].type)
 1087                         return (name_table[i].name);
 1088         }
 1089         return ("unknown");
 1090 }
 1091 
 1092 void
 1093 genkbd_diag(keyboard_t *kbd, int level)
 1094 {
 1095         if (level > 0) {
 1096                 printf("kbd%d: %s%d, %s (%d), config:0x%x, flags:0x%x",
 1097                     kbd->kb_index, kbd->kb_name, kbd->kb_unit,
 1098                     get_kbd_type_name(kbd->kb_type), kbd->kb_type,
 1099                     kbd->kb_config, kbd->kb_flags);
 1100                 if (kbd->kb_io_base > 0)
 1101                         printf(", port:0x%x-0x%x", kbd->kb_io_base,
 1102                             kbd->kb_io_base + kbd->kb_io_size - 1);
 1103                 printf("\n");
 1104         }
 1105 }
 1106 
 1107 #define set_lockkey_state(k, s, l)                              \
 1108         if (!((s) & l ## DOWN)) {                               \
 1109                 int i;                                          \
 1110                 (s) |= l ## DOWN;                               \
 1111                 (s) ^= l ## ED;                                 \
 1112                 i = (s) & LOCK_MASK;                            \
 1113                 (*kbdsw[(k)->kb_index]->ioctl)((k), KDSETLED, (caddr_t)&i); \
 1114         }
 1115 
 1116 static u_int
 1117 save_accent_key(keyboard_t *kbd, u_int key, int *accents)
 1118 {
 1119         int i;
 1120 
 1121         /* make an index into the accent map */
 1122         i = key - F_ACC + 1;
 1123         if ((i > kbd->kb_accentmap->n_accs)
 1124             || (kbd->kb_accentmap->acc[i - 1].accchar == 0)) {
 1125                 /* the index is out of range or pointing to an empty entry */
 1126                 *accents = 0;
 1127                 return (ERRKEY);
 1128         }
 1129 
 1130         /*
 1131          * If the same accent key has been hit twice, produce the accent
 1132          * char itself.
 1133          */
 1134         if (i == *accents) {
 1135                 key = kbd->kb_accentmap->acc[i - 1].accchar;
 1136                 *accents = 0;
 1137                 return (key);
 1138         }
 1139 
 1140         /* remember the index and wait for the next key  */
 1141         *accents = i;
 1142         return (NOKEY);
 1143 }
 1144 
 1145 static u_int
 1146 make_accent_char(keyboard_t *kbd, u_int ch, int *accents)
 1147 {
 1148         struct acc_t *acc;
 1149         int i;
 1150 
 1151         acc = &kbd->kb_accentmap->acc[*accents - 1];
 1152         *accents = 0;
 1153 
 1154         /*
 1155          * If the accent key is followed by the space key,
 1156          * produce the accent char itself.
 1157          */
 1158         if (ch == ' ')
 1159                 return (acc->accchar);
 1160 
 1161         /* scan the accent map */
 1162         for (i = 0; i < NUM_ACCENTCHARS; ++i) {
 1163                 if (acc->map[i][0] == 0)        /* end of table */
 1164                         break;
 1165                 if (acc->map[i][0] == ch)
 1166                         return (acc->map[i][1]);
 1167         }
 1168         /* this char cannot be accented... */
 1169         return (ERRKEY);
 1170 }
 1171 
 1172 int
 1173 genkbd_keyaction(keyboard_t *kbd, int keycode, int up, int *shiftstate,
 1174                  int *accents)
 1175 {
 1176         struct keyent_t *key;
 1177         int state = *shiftstate;
 1178         int action;
 1179         int f;
 1180         int i;
 1181 
 1182         i = keycode;
 1183         f = state & (AGRS | ALKED);
 1184         if ((f == AGRS1) || (f == AGRS2) || (f == ALKED))
 1185                 i += ALTGR_OFFSET;
 1186         key = &kbd->kb_keymap->key[i];
 1187         i = ((state & SHIFTS) ? 1 : 0)
 1188             | ((state & CTLS) ? 2 : 0)
 1189             | ((state & ALTS) ? 4 : 0);
 1190         if (((key->flgs & FLAG_LOCK_C) && (state & CLKED))
 1191                 || ((key->flgs & FLAG_LOCK_N) && (state & NLKED)) )
 1192                 i ^= 1;
 1193 
 1194         if (up) {       /* break: key released */
 1195                 action = kbd->kb_lastact[keycode];
 1196                 kbd->kb_lastact[keycode] = NOP;
 1197                 switch (action) {
 1198                 case LSHA:
 1199                         if (state & SHIFTAON) {
 1200                                 set_lockkey_state(kbd, state, ALK);
 1201                                 state &= ~ALKDOWN;
 1202                         }
 1203                         action = LSH;
 1204                         /* FALL THROUGH */
 1205                 case LSH:
 1206                         state &= ~SHIFTS1;
 1207                         break;
 1208                 case RSHA:
 1209                         if (state & SHIFTAON) {
 1210                                 set_lockkey_state(kbd, state, ALK);
 1211                                 state &= ~ALKDOWN;
 1212                         }
 1213                         action = RSH;
 1214                         /* FALL THROUGH */
 1215                 case RSH:
 1216                         state &= ~SHIFTS2;
 1217                         break;
 1218                 case LCTRA:
 1219                         if (state & SHIFTAON) {
 1220                                 set_lockkey_state(kbd, state, ALK);
 1221                                 state &= ~ALKDOWN;
 1222                         }
 1223                         action = LCTR;
 1224                         /* FALL THROUGH */
 1225                 case LCTR:
 1226                         state &= ~CTLS1;
 1227                         break;
 1228                 case RCTRA:
 1229                         if (state & SHIFTAON) {
 1230                                 set_lockkey_state(kbd, state, ALK);
 1231                                 state &= ~ALKDOWN;
 1232                         }
 1233                         action = RCTR;
 1234                         /* FALL THROUGH */
 1235                 case RCTR:
 1236                         state &= ~CTLS2;
 1237                         break;
 1238                 case LALTA:
 1239                         if (state & SHIFTAON) {
 1240                                 set_lockkey_state(kbd, state, ALK);
 1241                                 state &= ~ALKDOWN;
 1242                         }
 1243                         action = LALT;
 1244                         /* FALL THROUGH */
 1245                 case LALT:
 1246                         state &= ~ALTS1;
 1247                         break;
 1248                 case RALTA:
 1249                         if (state & SHIFTAON) {
 1250                                 set_lockkey_state(kbd, state, ALK);
 1251                                 state &= ~ALKDOWN;
 1252                         }
 1253                         action = RALT;
 1254                         /* FALL THROUGH */
 1255                 case RALT:
 1256                         state &= ~ALTS2;
 1257                         break;
 1258                 case ASH:
 1259                         state &= ~AGRS1;
 1260                         break;
 1261                 case META:
 1262                         state &= ~METAS1;
 1263                         break;
 1264                 case NLK:
 1265                         state &= ~NLKDOWN;
 1266                         break;
 1267                 case CLK:
 1268 #ifndef PC98
 1269                         state &= ~CLKDOWN;
 1270 #else
 1271                         state &= ~CLKED;
 1272                         i = state & LOCK_MASK;
 1273                         (*kbdsw[kbd->kb_index]->ioctl)(kbd, KDSETLED,
 1274                                                        (caddr_t)&i);
 1275 #endif
 1276                         break;
 1277                 case SLK:
 1278                         state &= ~SLKDOWN;
 1279                         break;
 1280                 case ALK:
 1281                         state &= ~ALKDOWN;
 1282                         break;
 1283                 case NOP:
 1284                         /* release events of regular keys are not reported */
 1285                         *shiftstate &= ~SHIFTAON;
 1286                         return (NOKEY);
 1287                 }
 1288                 *shiftstate = state & ~SHIFTAON;
 1289                 return (SPCLKEY | RELKEY | action);
 1290         } else {        /* make: key pressed */
 1291                 action = key->map[i];
 1292                 state &= ~SHIFTAON;
 1293                 if (key->spcl & (0x80 >> i)) {
 1294                         /* special keys */
 1295                         if (kbd->kb_lastact[keycode] == NOP)
 1296                                 kbd->kb_lastact[keycode] = action;
 1297                         if (kbd->kb_lastact[keycode] != action)
 1298                                 action = NOP;
 1299                         switch (action) {
 1300                         /* LOCKING KEYS */
 1301                         case NLK:
 1302                                 set_lockkey_state(kbd, state, NLK);
 1303                                 break;
 1304                         case CLK:
 1305 #ifndef PC98
 1306                                 set_lockkey_state(kbd, state, CLK);
 1307 #else
 1308                                 state |= CLKED;
 1309                                 i = state & LOCK_MASK;
 1310                                 (*kbdsw[kbd->kb_index]->ioctl)(kbd, KDSETLED,
 1311                                                                (caddr_t)&i);
 1312 #endif
 1313                                 break;
 1314                         case SLK:
 1315                                 set_lockkey_state(kbd, state, SLK);
 1316                                 break;
 1317                         case ALK:
 1318                                 set_lockkey_state(kbd, state, ALK);
 1319                                 break;
 1320                         /* NON-LOCKING KEYS */
 1321                         case SPSC: case RBT:  case SUSP: case STBY:
 1322                         case DBG:  case NEXT: case PREV: case PNC:
 1323                         case HALT: case PDWN:
 1324                                 *accents = 0;
 1325                                 break;
 1326                         case BTAB:
 1327                                 *accents = 0;
 1328                                 action |= BKEY;
 1329                                 break;
 1330                         case LSHA:
 1331                                 state |= SHIFTAON;
 1332                                 action = LSH;
 1333                                 /* FALL THROUGH */
 1334                         case LSH:
 1335                                 state |= SHIFTS1;
 1336                                 break;
 1337                         case RSHA:
 1338                                 state |= SHIFTAON;
 1339                                 action = RSH;
 1340                                 /* FALL THROUGH */
 1341                         case RSH:
 1342                                 state |= SHIFTS2;
 1343                                 break;
 1344                         case LCTRA:
 1345                                 state |= SHIFTAON;
 1346                                 action = LCTR;
 1347                                 /* FALL THROUGH */
 1348                         case LCTR:
 1349                                 state |= CTLS1;
 1350                                 break;
 1351                         case RCTRA:
 1352                                 state |= SHIFTAON;
 1353                                 action = RCTR;
 1354                                 /* FALL THROUGH */
 1355                         case RCTR:
 1356                                 state |= CTLS2;
 1357                                 break;
 1358                         case LALTA:
 1359                                 state |= SHIFTAON;
 1360                                 action = LALT;
 1361                                 /* FALL THROUGH */
 1362                         case LALT:
 1363                                 state |= ALTS1;
 1364                                 break;
 1365                         case RALTA:
 1366                                 state |= SHIFTAON;
 1367                                 action = RALT;
 1368                                 /* FALL THROUGH */
 1369                         case RALT:
 1370                                 state |= ALTS2;
 1371                                 break;
 1372                         case ASH:
 1373                                 state |= AGRS1;
 1374                                 break;
 1375                         case META:
 1376                                 state |= METAS1;
 1377                                 break;
 1378                         case NOP:
 1379                                 *shiftstate = state;
 1380                                 return (NOKEY);
 1381                         default:
 1382                                 /* is this an accent (dead) key? */
 1383                                 *shiftstate = state;
 1384                                 if (action >= F_ACC && action <= L_ACC) {
 1385                                         action = save_accent_key(kbd, action,
 1386                                                                  accents);
 1387                                         switch (action) {
 1388                                         case NOKEY:
 1389                                         case ERRKEY:
 1390                                                 return (action);
 1391                                         default:
 1392                                                 if (state & METAS)
 1393                                                         return (action | MKEY);
 1394                                                 else
 1395                                                         return (action);
 1396                                         }
 1397                                         /* NOT REACHED */
 1398                                 }
 1399                                 /* other special keys */
 1400                                 if (*accents > 0) {
 1401                                         *accents = 0;
 1402                                         return (ERRKEY);
 1403                                 }
 1404                                 if (action >= F_FN && action <= L_FN)
 1405                                         action |= FKEY;
 1406                                 /* XXX: return fkey string for the FKEY? */
 1407                                 return (SPCLKEY | action);
 1408                         }
 1409                         *shiftstate = state;
 1410                         return (SPCLKEY | action);
 1411                 } else {
 1412                         /* regular keys */
 1413                         kbd->kb_lastact[keycode] = NOP;
 1414                         *shiftstate = state;
 1415                         if (*accents > 0) {
 1416                                 /* make an accented char */
 1417                                 action = make_accent_char(kbd, action, accents);
 1418                                 if (action == ERRKEY)
 1419                                         return (action);
 1420                         }
 1421                         if (state & METAS)
 1422                                 action |= MKEY;
 1423                         return (action);
 1424                 }
 1425         }
 1426         /* NOT REACHED */
 1427 }

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