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/pc98/cbus/syscons_cbus.c

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    1 /*-
    2  * Copyright (c) 1999 FreeBSD(98) Porting Team.
    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  * $FreeBSD$
   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 #include <sys/consio.h>
   38 #include <sys/sysctl.h>
   39 
   40 #include <machine/clock.h>
   41 #include <machine/ppireg.h>
   42 #include <machine/timerreg.h>
   43 
   44 #include <pc98/pc98/pc98_machdep.h>
   45 
   46 #include <dev/syscons/syscons.h>
   47 
   48 #include <isa/isavar.h>
   49 
   50 static devclass_t       sc_devclass;
   51 
   52 static sc_softc_t main_softc;
   53 #ifdef SC_NO_SUSPEND_VTYSWITCH
   54 static int sc_no_suspend_vtswitch = 1;
   55 #else
   56 static int sc_no_suspend_vtswitch = 0;
   57 #endif
   58 static int sc_cur_scr;
   59 
   60 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
   61 SYSCTL_DECL(_hw_syscons);
   62 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   63         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   64 
   65 static void
   66 scidentify (driver_t *driver, device_t parent)
   67 {
   68         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   69 }
   70 
   71 static int
   72 scprobe(device_t dev)
   73 {
   74         /* No pnp support */
   75         if (isa_get_vendorid(dev))
   76                 return (ENXIO);
   77 
   78         device_set_desc(dev, "System console");
   79         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   80 }
   81 
   82 static int
   83 scattach(device_t dev)
   84 {
   85         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
   86 }
   87 
   88 static int
   89 scsuspend(device_t dev)
   90 {
   91         int             retry = 10;
   92         sc_softc_t      *sc;
   93 
   94         sc = &main_softc;
   95 
   96         if (sc->cur_scp == NULL)
   97                 return (0);
   98 
   99         sc_cur_scr = sc->cur_scp->index;
  100 
  101         if (sc_no_suspend_vtswitch)
  102                 return (0);
  103 
  104         do {
  105                 sc_switch_scr(sc, 0);
  106                 if (!sc->switch_in_progress) {
  107                         break;
  108                 }
  109                 pause("scsuspend", hz);
  110         } while (retry--);
  111 
  112         return (0);
  113 }
  114 
  115 static int
  116 scresume(device_t dev)
  117 {
  118         sc_softc_t      *sc;
  119 
  120         if (sc_no_suspend_vtswitch)
  121                 return (0);
  122 
  123         sc = &main_softc;
  124         sc_switch_scr(sc, sc_cur_scr);
  125 
  126         return (0);
  127 }
  128 
  129 int
  130 sc_max_unit(void)
  131 {
  132         return devclass_get_maxunit(sc_devclass);
  133 }
  134 
  135 sc_softc_t
  136 *sc_get_softc(int unit, int flags)
  137 {
  138         sc_softc_t *sc;
  139 
  140         if (unit < 0)
  141                 return NULL;
  142         if (flags & SC_KERNEL_CONSOLE) {
  143                 /* FIXME: clear if it is wired to another unit! */
  144                 sc = &main_softc;
  145         } else {
  146                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  147                 if (sc == NULL)
  148                         return NULL;
  149         }
  150         sc->unit = unit;
  151         if (!(sc->flags & SC_INIT_DONE)) {
  152                 sc->keyboard = -1;
  153                 sc->adapter = -1;
  154                 sc->mouse_char = SC_MOUSE_CHAR;
  155         }
  156         return sc;
  157 }
  158 
  159 sc_softc_t
  160 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  161 {
  162         sc_softc_t *sc;
  163         int units;
  164         int i;
  165 
  166         sc = &main_softc;
  167         if (((adp == NULL) || (adp == sc->adp))
  168             && ((kbd == NULL) || (kbd == sc->kbd)))
  169                 return sc;
  170         units = devclass_get_maxunit(sc_devclass);
  171         for (i = 0; i < units; ++i) {
  172                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  173                 if (sc == NULL)
  174                         continue;
  175                 if (((adp == NULL) || (adp == sc->adp))
  176                     && ((kbd == NULL) || (kbd == sc->kbd)))
  177                         return sc;
  178         }
  179         return NULL;
  180 }
  181 
  182 int
  183 sc_get_cons_priority(int *unit, int *flags)
  184 {
  185         const char *at;
  186         int u, f;
  187 
  188         *unit = -1;
  189         for (u = 0; u < 16; u++) {
  190                 if (resource_disabled(SC_DRIVER_NAME, u))
  191                         continue;
  192                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  193                         continue;
  194                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  195                         f = 0;
  196                 if (f & SC_KERNEL_CONSOLE) {
  197                         /* the user designates this unit to be the console */
  198                         *unit = u;
  199                         *flags = f;
  200                         break;
  201                 }
  202                 if (*unit < 0) {
  203                         /* ...otherwise remember the first found unit */
  204                         *unit = u;
  205                         *flags = f;
  206                 }
  207         }
  208         if (*unit < 0) {
  209                 *unit = 0;
  210                 *flags = 0;
  211         }
  212         return CN_INTERNAL;
  213 }
  214 
  215 void
  216 sc_get_bios_values(bios_values_t *values)
  217 {
  218         values->cursor_start = 15;
  219         values->cursor_end = 16;
  220         values->shift_state = 0;
  221         if (pc98_machine_type & M_8M)
  222                 values->bell_pitch = BELL_PITCH_8M;
  223         else
  224                 values->bell_pitch = BELL_PITCH_5M;
  225 }
  226 
  227 int
  228 sc_tone(int herz)
  229 {
  230 
  231         if (herz) {
  232                 /* enable counter 1 */
  233                 ppi_spkr_on();
  234                 /* set command for counter 1, 2 byte write */
  235                 if (timer_spkr_acquire())
  236                         return EBUSY;
  237                 /* set pitch */
  238                 spkr_set_pitch(timer_freq / herz);
  239         } else {
  240                 /* disable counter 1 */
  241                 ppi_spkr_off();
  242                 timer_spkr_release();
  243         }
  244         return 0;
  245 }
  246 
  247 static device_method_t sc_methods[] = {
  248         DEVMETHOD(device_identify,      scidentify),
  249         DEVMETHOD(device_probe,         scprobe),
  250         DEVMETHOD(device_attach,        scattach),
  251         DEVMETHOD(device_suspend,       scsuspend),
  252         DEVMETHOD(device_resume,        scresume),
  253         { 0, 0 }
  254 };
  255 
  256 static driver_t sc_driver = {
  257         SC_DRIVER_NAME,
  258         sc_methods,
  259         sizeof(sc_softc_t),
  260 };
  261 
  262 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);

Cache object: a9227f9d292f5db69907300acd3d1e25


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