syscons_isa.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    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 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/12.0/sys/isa/syscons_isa.c 326272 2017-11-27 15:23:17Z pfg $");
   31 
   32 #include "opt_syscons.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/kernel.h>
   37 #include <sys/module.h>
   38 #include <sys/bus.h>
   39 #include <sys/cons.h>
   40 #include <sys/kbio.h>
   41 #include <sys/consio.h>
   42 #include <sys/sysctl.h>
   43 
   44 #if defined(__i386__) || defined(__amd64__)
   45 
   46 #include <machine/clock.h>
   47 #include <machine/md_var.h>
   48 #include <machine/pc/bios.h>
   49 
   50 #include <vm/vm.h>
   51 #include <vm/pmap.h>
   52 #include <vm/vm_param.h>
   53 
   54 #define BIOS_CLKED      (1 << 6)
   55 #define BIOS_NLKED      (1 << 5)
   56 #define BIOS_SLKED      (1 << 4)
   57 #define BIOS_ALKED      0
   58 
   59 #endif
   60 
   61 #include <dev/syscons/syscons.h>
   62 
   63 #include <isa/isavar.h>
   64 
   65 static devclass_t       sc_devclass;
   66 
   67 static sc_softc_t       main_softc;
   68 
   69 static void
   70 scidentify(driver_t *driver, device_t parent)
   71 {
   72 
   73         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   74 }
   75 
   76 static int
   77 scprobe(device_t dev)
   78 {
   79 
   80         /* No pnp support */
   81         if (isa_get_vendorid(dev))
   82                 return (ENXIO);
   83 
   84         device_set_desc(dev, "System console");
   85         return (sc_probe_unit(device_get_unit(dev), device_get_flags(dev)));
   86 }
   87 
   88 static int
   89 scattach(device_t dev)
   90 {
   91 
   92         return (sc_attach_unit(device_get_unit(dev), device_get_flags(dev) |
   93             SC_AUTODETECT_KBD));
   94 }
   95 
   96 int
   97 sc_max_unit(void)
   98 {
   99 
  100         return (devclass_get_maxunit(sc_devclass));
  101 }
  102 
  103 sc_softc_t
  104 *sc_get_softc(int unit, int flags)
  105 {
  106         sc_softc_t *sc;
  107 
  108         if (unit < 0)
  109                 return (NULL);
  110         if ((flags & SC_KERNEL_CONSOLE) != 0) {
  111                 /* FIXME: clear if it is wired to another unit! */
  112                 sc = &main_softc;
  113         } else {
  114                 sc = device_get_softc(devclass_get_device(sc_devclass, unit));
  115                 if (sc == NULL)
  116                         return (NULL);
  117         }
  118         sc->unit = unit;
  119         if ((sc->flags & SC_INIT_DONE) == 0) {
  120                 sc->keyboard = -1;
  121                 sc->adapter = -1;
  122                 sc->cursor_char = SC_CURSOR_CHAR;
  123                 sc->mouse_char = SC_MOUSE_CHAR;
  124         }
  125         return (sc);
  126 }
  127 
  128 sc_softc_t
  129 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  130 {
  131         sc_softc_t *sc;
  132         int i;
  133         int units;
  134 
  135         sc = &main_softc;
  136         if ((adp == NULL || adp == sc->adp) &&
  137             (kbd == NULL || kbd == sc->kbd))
  138                 return (sc);
  139         units = devclass_get_maxunit(sc_devclass);
  140         for (i = 0; i < units; ++i) {
  141                 sc = device_get_softc(devclass_get_device(sc_devclass, i));
  142                 if (sc == NULL)
  143                         continue;
  144                 if ((adp == NULL || adp == sc->adp) &&
  145                     (kbd == NULL || kbd == sc->kbd))
  146                         return (sc);
  147         }
  148         return (NULL);
  149 }
  150 
  151 int
  152 sc_get_cons_priority(int *unit, int *flags)
  153 {
  154         const char *at;
  155         int f, u;
  156 
  157         *unit = -1;
  158         for (u = 0; u < 16; u++) {
  159                 if (resource_disabled(SC_DRIVER_NAME, u))
  160                         continue;
  161                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  162                         continue;
  163                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  164                         f = 0;
  165                 if (f & SC_KERNEL_CONSOLE) {
  166                         /* the user designates this unit to be the console */
  167                         *unit = u;
  168                         *flags = f;
  169                         break;
  170                 }
  171                 if (*unit < 0) {
  172                         /* ...otherwise remember the first found unit */
  173                         *unit = u;
  174                         *flags = f;
  175                 }
  176         }
  177         if (*unit < 0) {
  178                 *unit = 0;
  179                 *flags = 0;
  180         }
  181 #if 0
  182         return ((*flags & SC_KERNEL_CONSOLE) != 0 ? CN_INTERNAL : CN_NORMAL);
  183 #endif
  184         return (CN_INTERNAL);
  185 }
  186 
  187 void
  188 sc_get_bios_values(bios_values_t *values)
  189 {
  190 #if defined(__i386__) || defined(__amd64__)
  191         uint8_t shift;
  192 
  193         shift = *(uint8_t *)BIOS_PADDRTOVADDR(0x417);
  194         values->shift_state = ((shift & BIOS_CLKED) != 0 ? CLKED : 0) |
  195             ((shift & BIOS_NLKED) != 0 ? NLKED : 0) |
  196             ((shift & BIOS_SLKED) != 0 ? SLKED : 0) |
  197             ((shift & BIOS_ALKED) != 0 ? ALKED : 0);
  198 #endif
  199         values->bell_pitch = BELL_PITCH;
  200 }
  201 
  202 int
  203 sc_tone(int herz)
  204 {
  205 
  206 #if defined(HAS_TIMER_SPKR)
  207         if (herz) {
  208                 if (timer_spkr_acquire())
  209                         return (EBUSY);
  210                 timer_spkr_setfreq(herz);
  211         } else
  212                 timer_spkr_release();
  213 #endif
  214 
  215         return (0);
  216 }
  217 
  218 static device_method_t sc_methods[] = {
  219         DEVMETHOD(device_identify,      scidentify),
  220         DEVMETHOD(device_probe,         scprobe),
  221         DEVMETHOD(device_attach,        scattach),
  222         { 0, 0 }
  223 };
  224 
  225 static driver_t sc_driver = {
  226         SC_DRIVER_NAME,
  227         sc_methods,
  228         sizeof(sc_softc_t),
  229 };
  230 
  231 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/isa/syscons_isa.c

FreeBSD/Linux Kernel Cross Reference
sys/isa/syscons_isa.c