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 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/6.0/sys/isa/syscons_isa.c 146211 2005-05-14 09:10:02Z nyan $");
   29 
   30 #include "opt_syscons.h"
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/kernel.h>
   35 #include <sys/module.h>
   36 #include <sys/bus.h>
   37 #include <sys/cons.h>
   38 #include <sys/kbio.h>
   39 #include <sys/consio.h>
   40 #include <sys/sysctl.h>
   41 
   42 #if defined(__i386__) || defined(__amd64__)
   43 
   44 #include <machine/clock.h>
   45 #include <machine/md_var.h>
   46 #include <machine/ppireg.h>
   47 #include <machine/timerreg.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 #ifdef SC_NO_SUSPEND_VTYSWITCH
   69 static int sc_no_suspend_vtswitch = 1;
   70 #else
   71 static int sc_no_suspend_vtswitch = 0;
   72 #endif
   73 static int sc_cur_scr;
   74 
   75 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
   76 SYSCTL_DECL(_hw_syscons);
   77 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   78         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   79 
   80 static void
   81 scidentify (driver_t *driver, device_t parent)
   82 {
   83         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   84 }
   85 
   86 static int
   87 scprobe(device_t dev)
   88 {
   89         /* No pnp support */
   90         if (isa_get_vendorid(dev))
   91                 return (ENXIO);
   92 
   93         device_set_desc(dev, "System console");
   94         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   95 }
   96 
   97 static int
   98 scattach(device_t dev)
   99 {
  100         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
  101 }
  102 
  103 static int
  104 scsuspend(device_t dev)
  105 {
  106         int             retry = 10;
  107         static int      dummy;
  108         sc_softc_t      *sc;
  109 
  110         sc = &main_softc;
  111 
  112         if (sc->cur_scp == NULL)
  113                 return (0);
  114 
  115         sc_cur_scr = sc->cur_scp->index;
  116 
  117         if (sc_no_suspend_vtswitch)
  118                 return (0);
  119 
  120         do {
  121                 sc_switch_scr(sc, 0);
  122                 if (!sc->switch_in_progress) {
  123                         break;
  124                 }
  125                 tsleep(&dummy, 0, "scsuspend", 100);
  126         } while (retry--);
  127 
  128         return (0);
  129 }
  130 
  131 static int
  132 scresume(device_t dev)
  133 {
  134         sc_softc_t      *sc;
  135 
  136         if (sc_no_suspend_vtswitch)
  137                 return (0);
  138 
  139         sc = &main_softc;
  140         sc_switch_scr(sc, sc_cur_scr);
  141 
  142         return (0);
  143 }
  144 
  145 int
  146 sc_max_unit(void)
  147 {
  148         return devclass_get_maxunit(sc_devclass);
  149 }
  150 
  151 sc_softc_t
  152 *sc_get_softc(int unit, int flags)
  153 {
  154         sc_softc_t *sc;
  155 
  156         if (unit < 0)
  157                 return NULL;
  158         if (flags & SC_KERNEL_CONSOLE) {
  159                 /* FIXME: clear if it is wired to another unit! */
  160                 sc = &main_softc;
  161         } else {
  162                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  163                 if (sc == NULL)
  164                         return NULL;
  165         }
  166         sc->unit = unit;
  167         if (!(sc->flags & SC_INIT_DONE)) {
  168                 sc->keyboard = -1;
  169                 sc->adapter = -1;
  170                 sc->cursor_char = SC_CURSOR_CHAR;
  171                 sc->mouse_char = SC_MOUSE_CHAR;
  172         }
  173         return sc;
  174 }
  175 
  176 sc_softc_t
  177 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  178 {
  179         sc_softc_t *sc;
  180         int units;
  181         int i;
  182 
  183         sc = &main_softc;
  184         if (((adp == NULL) || (adp == sc->adp))
  185             && ((kbd == NULL) || (kbd == sc->kbd)))
  186                 return sc;
  187         units = devclass_get_maxunit(sc_devclass);
  188         for (i = 0; i < units; ++i) {
  189                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  190                 if (sc == NULL)
  191                         continue;
  192                 if (((adp == NULL) || (adp == sc->adp))
  193                     && ((kbd == NULL) || (kbd == sc->kbd)))
  194                         return sc;
  195         }
  196         return NULL;
  197 }
  198 
  199 int
  200 sc_get_cons_priority(int *unit, int *flags)
  201 {
  202         const char *at;
  203         int u, f;
  204 
  205         *unit = -1;
  206         for (u = 0; u < 16; u++) {
  207                 if (resource_disabled(SC_DRIVER_NAME, u))
  208                         continue;
  209                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  210                         continue;
  211                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  212                         f = 0;
  213                 if (f & SC_KERNEL_CONSOLE) {
  214                         /* the user designates this unit to be the console */
  215                         *unit = u;
  216                         *flags = f;
  217                         break;
  218                 }
  219                 if (*unit < 0) {
  220                         /* ...otherwise remember the first found unit */
  221                         *unit = u;
  222                         *flags = f;
  223                 }
  224         }
  225         if (*unit < 0)
  226                 return CN_DEAD;
  227 #if 0
  228         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  229 #endif
  230         return CN_INTERNAL;
  231 }
  232 
  233 void
  234 sc_get_bios_values(bios_values_t *values)
  235 {
  236 #if defined(__i386__) || defined(__amd64__)
  237         u_int8_t shift;
  238 
  239         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  240         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  241         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  242         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  243                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  244                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  245                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  246 #else
  247         values->cursor_start = 0;
  248         values->cursor_end = 32;
  249         values->shift_state = 0;
  250 #endif
  251         values->bell_pitch = BELL_PITCH;
  252 }
  253 
  254 int
  255 sc_tone(int herz)
  256 {
  257 #if defined(__i386__) || defined(__amd64__)
  258         if (herz) {
  259                 /* set command for counter 2, 2 byte write */
  260                 if (timer_spkr_acquire())
  261                         return EBUSY;
  262                 /* set pitch */
  263                 spkr_set_pitch(timer_freq / herz);
  264                 /* enable counter 2 output to speaker */
  265                 ppi_spkr_on();
  266         } else {
  267                 /* disable counter 2 output to speaker */
  268                 ppi_spkr_off();
  269                 timer_spkr_release();
  270         }
  271 #endif
  272 
  273         return 0;
  274 }
  275 
  276 static device_method_t sc_methods[] = {
  277         DEVMETHOD(device_identify,      scidentify),
  278         DEVMETHOD(device_probe,         scprobe),
  279         DEVMETHOD(device_attach,        scattach),
  280         DEVMETHOD(device_suspend,       scsuspend),
  281         DEVMETHOD(device_resume,        scresume),
  282         { 0, 0 }
  283 };
  284 
  285 static driver_t sc_driver = {
  286         SC_DRIVER_NAME,
  287         sc_methods,
  288         sizeof(sc_softc_t),
  289 };
  290 
  291 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