The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/isa/syscons_isa.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  * $FreeBSD: src/sys/isa/syscons_isa.c,v 1.11.2.2 2001/08/01 10:42:28 yokota Exp $
   27  */
   28 
   29 #include "opt_syscons.h"
   30 
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/kernel.h>
   34 #include <sys/module.h>
   35 #include <sys/bus.h>
   36 #include <sys/cons.h>
   37 
   38 #include <machine/console.h>
   39 
   40 #ifdef __i386__
   41 
   42 #include <machine/clock.h>
   43 #include <machine/md_var.h>
   44 #include <machine/pc/bios.h>
   45 
   46 #include <vm/vm.h>
   47 #include <vm/pmap.h>
   48 
   49 #include <i386/isa/timerreg.h>
   50 
   51 #define BIOS_CLKED      (1 << 6)
   52 #define BIOS_NLKED      (1 << 5)
   53 #define BIOS_SLKED      (1 << 4)
   54 #define BIOS_ALKED      0
   55 
   56 #endif /* __i386__ */
   57 
   58 #include <dev/syscons/syscons.h>
   59 
   60 #include <isa/isareg.h>
   61 #include <isa/isavar.h>
   62 
   63 static devclass_t       sc_devclass;
   64 
   65 static int      scprobe(device_t dev);
   66 static int      scattach(device_t dev);
   67 
   68 static device_method_t sc_methods[] = {
   69         DEVMETHOD(device_probe,         scprobe),
   70         DEVMETHOD(device_attach,        scattach),
   71         { 0, 0 }
   72 };
   73 
   74 static driver_t sc_driver = {
   75         SC_DRIVER_NAME,
   76         sc_methods,
   77         sizeof(sc_softc_t),
   78 };
   79 
   80 static sc_softc_t main_softc;
   81 
   82 static int
   83 scprobe(device_t dev)
   84 {
   85         /* No pnp support */
   86         if (isa_get_vendorid(dev))
   87                 return (ENXIO);
   88 
   89         device_set_desc(dev, "System console");
   90         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   91 }
   92 
   93 static int
   94 scattach(device_t dev)
   95 {
   96         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
   97 }
   98 
   99 int
  100 sc_max_unit(void)
  101 {
  102         return devclass_get_maxunit(sc_devclass);
  103 }
  104 
  105 sc_softc_t
  106 *sc_get_softc(int unit, int flags)
  107 {
  108         sc_softc_t *sc;
  109 
  110         if (unit < 0)
  111                 return NULL;
  112         if (flags & SC_KERNEL_CONSOLE) {
  113                 /* FIXME: clear if it is wired to another unit! */
  114                 sc = &main_softc;
  115         } else {
  116                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  117                 if (sc == NULL)
  118                         return NULL;
  119         }
  120         sc->unit = unit;
  121         if (!(sc->flags & SC_INIT_DONE)) {
  122                 sc->keyboard = -1;
  123                 sc->adapter = -1;
  124                 sc->cursor_char = SC_CURSOR_CHAR;
  125                 sc->mouse_char = SC_MOUSE_CHAR;
  126         }
  127         return sc;
  128 }
  129 
  130 sc_softc_t
  131 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  132 {
  133         sc_softc_t *sc;
  134         int units;
  135         int i;
  136 
  137         sc = &main_softc;
  138         if (((adp == NULL) || (adp == sc->adp))
  139             && ((kbd == NULL) || (kbd == sc->kbd)))
  140                 return sc;
  141         units = devclass_get_maxunit(sc_devclass);
  142         for (i = 0; i < units; ++i) {
  143                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  144                 if (sc == NULL)
  145                         continue;
  146                 if (((adp == NULL) || (adp == sc->adp))
  147                     && ((kbd == NULL) || (kbd == sc->kbd)))
  148                         return sc;
  149         }
  150         return NULL;
  151 }
  152 
  153 int
  154 sc_get_cons_priority(int *unit, int *flags)
  155 {
  156         int disabled;
  157         int u, f;
  158         int i;
  159 
  160         *unit = -1;
  161         for (i = -1; (i = resource_locate(i, SC_DRIVER_NAME)) >= 0;) {
  162                 u = resource_query_unit(i);
  163                 if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
  164                                         &disabled) == 0) && disabled)
  165                         continue;
  166                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  167                         f = 0;
  168                 if (f & SC_KERNEL_CONSOLE) {
  169                         /* the user designates this unit to be the console */
  170                         *unit = u;
  171                         *flags = f;
  172                         break;
  173                 }
  174                 if (*unit < 0) {
  175                         /* ...otherwise remember the first found unit */
  176                         *unit = u;
  177                         *flags = f;
  178                 }
  179         }
  180         if ((i < 0) && (*unit < 0))
  181                 return CN_DEAD;
  182 #if 0
  183         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  184 #endif
  185         return CN_INTERNAL;
  186 }
  187 
  188 void
  189 sc_get_bios_values(bios_values_t *values)
  190 {
  191 #ifdef __i386__
  192         u_int8_t shift;
  193 
  194         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  195         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  196         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  197         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  198                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  199                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  200                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  201         values->bell_pitch = BELL_PITCH;
  202 #else /* !__i386__ */
  203         values->cursor_start = 0;
  204         values->cursor_end = 32;
  205         values->shift_state = 0;
  206         values->bell_pitch = BELL_PITCH;
  207 #endif /* __i386__ */
  208 }
  209 
  210 int
  211 sc_tone(int herz)
  212 {
  213 #ifdef __i386__
  214         int pitch;
  215 
  216         if (herz) {
  217                 /* set command for counter 2, 2 byte write */
  218                 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
  219                         return EBUSY;
  220                 /* set pitch */
  221                 pitch = timer_freq/herz;
  222                 outb(TIMER_CNTR2, pitch);
  223                 outb(TIMER_CNTR2, pitch >> 8);
  224                 /* enable counter 2 output to speaker */
  225                 outb(IO_PPI, inb(IO_PPI) | 3);
  226         } else {
  227                 /* disable counter 2 output to speaker */
  228                 outb(IO_PPI, inb(IO_PPI) & 0xFC);
  229                 release_timer2();
  230         }
  231 #endif /* __i386__ */
  232 
  233         return 0;
  234 }
  235 
  236 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);

Cache object: 18ec7d91d0132ecd7b1477ea50e8c9bf


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