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: releng/5.0/sys/isa/syscons_isa.c 105333 2002-10-17 16:09:13Z jhb $
   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/kbio.h>
   38 #include <sys/consio.h>
   39 
   40 
   41 #ifdef __i386__
   42 
   43 #include <machine/clock.h>
   44 #include <machine/md_var.h>
   45 #include <machine/pc/bios.h>
   46 
   47 #include <vm/vm.h>
   48 #include <vm/pmap.h>
   49 
   50 #include <i386/isa/timerreg.h>
   51 
   52 #define BIOS_CLKED      (1 << 6)
   53 #define BIOS_NLKED      (1 << 5)
   54 #define BIOS_SLKED      (1 << 4)
   55 #define BIOS_ALKED      0
   56 
   57 #endif /* __i386__ */
   58 
   59 #include <dev/syscons/syscons.h>
   60 
   61 #include <isa/isareg.h>
   62 #include <isa/isavar.h>
   63 
   64 static devclass_t       sc_devclass;
   65 
   66 static sc_softc_t main_softc;
   67 
   68 static void
   69 scidentify (driver_t *driver, device_t parent)
   70 {
   71         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   72 }
   73 
   74 static int
   75 scprobe(device_t dev)
   76 {
   77         /* No pnp support */
   78         if (isa_get_vendorid(dev))
   79                 return (ENXIO);
   80 
   81         device_set_desc(dev, "System console");
   82         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   83 }
   84 
   85 static int
   86 scattach(device_t dev)
   87 {
   88         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
   89 }
   90 
   91 #ifndef SC_NO_SUSPEND_VTYSWITCH
   92 static int      sc_cur_scr;
   93 #endif
   94 
   95 static int
   96 scsuspend(device_t dev)
   97 {
   98 #ifndef SC_NO_SUSPEND_VTYSWITCH
   99         int             retry = 10;
  100         static int      dummy;
  101         sc_softc_t      *sc;
  102 
  103         sc = &main_softc;
  104         sc_cur_scr = sc->cur_scp->index;
  105         do {
  106                 sc_switch_scr(sc, 0);
  107                 if (!sc->switch_in_progress) {
  108                         break;
  109                 }
  110                 tsleep(&dummy, 0, "scsuspend", 100);
  111         } while (retry--);
  112 
  113 #endif
  114         return (0);
  115 }
  116 
  117 static int
  118 scresume(device_t dev)
  119 {
  120 #ifndef SC_NO_SUSPEND_VTYSWITCH
  121         sc_softc_t      *sc;
  122 
  123         sc = &main_softc;
  124         sc_switch_scr(sc, sc_cur_scr);
  125 
  126 #endif
  127         return (0);
  128 }
  129 
  130 int
  131 sc_max_unit(void)
  132 {
  133         return devclass_get_maxunit(sc_devclass);
  134 }
  135 
  136 sc_softc_t
  137 *sc_get_softc(int unit, int flags)
  138 {
  139         sc_softc_t *sc;
  140 
  141         if (unit < 0)
  142                 return NULL;
  143         if (flags & SC_KERNEL_CONSOLE) {
  144                 /* FIXME: clear if it is wired to another unit! */
  145                 sc = &main_softc;
  146         } else {
  147                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  148                 if (sc == NULL)
  149                         return NULL;
  150         }
  151         sc->unit = unit;
  152         if (!(sc->flags & SC_INIT_DONE)) {
  153                 sc->keyboard = -1;
  154                 sc->adapter = -1;
  155                 sc->cursor_char = SC_CURSOR_CHAR;
  156                 sc->mouse_char = SC_MOUSE_CHAR;
  157         }
  158         return sc;
  159 }
  160 
  161 sc_softc_t
  162 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  163 {
  164         sc_softc_t *sc;
  165         int units;
  166         int i;
  167 
  168         sc = &main_softc;
  169         if (((adp == NULL) || (adp == sc->adp))
  170             && ((kbd == NULL) || (kbd == sc->kbd)))
  171                 return sc;
  172         units = devclass_get_maxunit(sc_devclass);
  173         for (i = 0; i < units; ++i) {
  174                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  175                 if (sc == NULL)
  176                         continue;
  177                 if (((adp == NULL) || (adp == sc->adp))
  178                     && ((kbd == NULL) || (kbd == sc->kbd)))
  179                         return sc;
  180         }
  181         return NULL;
  182 }
  183 
  184 int
  185 sc_get_cons_priority(int *unit, int *flags)
  186 {
  187         int disabled;
  188         const char *at;
  189         int u, f;
  190 
  191         *unit = -1;
  192         for (u = 0; u < 16; u++) {
  193                 if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
  194                                         &disabled) == 0) && disabled)
  195                         continue;
  196                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  197                         continue;
  198                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  199                         f = 0;
  200                 if (f & SC_KERNEL_CONSOLE) {
  201                         /* the user designates this unit to be the console */
  202                         *unit = u;
  203                         *flags = f;
  204                         break;
  205                 }
  206                 if (*unit < 0) {
  207                         /* ...otherwise remember the first found unit */
  208                         *unit = u;
  209                         *flags = f;
  210                 }
  211         }
  212         if (*unit < 0)
  213                 return CN_DEAD;
  214 #if 0
  215         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  216 #endif
  217         return CN_INTERNAL;
  218 }
  219 
  220 void
  221 sc_get_bios_values(bios_values_t *values)
  222 {
  223 #ifdef __i386__
  224         u_int8_t shift;
  225 
  226         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  227         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  228         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  229         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  230                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  231                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  232                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  233         values->bell_pitch = BELL_PITCH;
  234 #else /* !__i386__ */
  235         values->cursor_start = 0;
  236         values->cursor_end = 32;
  237         values->shift_state = 0;
  238         values->bell_pitch = BELL_PITCH;
  239 #endif /* __i386__ */
  240 }
  241 
  242 int
  243 sc_tone(int herz)
  244 {
  245 #ifdef __i386__
  246         int pitch;
  247 
  248         if (herz) {
  249                 /* set command for counter 2, 2 byte write */
  250                 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
  251                         return EBUSY;
  252                 /* set pitch */
  253                 pitch = timer_freq/herz;
  254                 outb(TIMER_CNTR2, pitch);
  255                 outb(TIMER_CNTR2, pitch >> 8);
  256                 /* enable counter 2 output to speaker */
  257                 outb(IO_PPI, inb(IO_PPI) | 3);
  258         } else {
  259                 /* disable counter 2 output to speaker */
  260                 outb(IO_PPI, inb(IO_PPI) & 0xFC);
  261                 release_timer2();
  262         }
  263 #endif /* __i386__ */
  264 
  265         return 0;
  266 }
  267 
  268 static device_method_t sc_methods[] = {
  269         DEVMETHOD(device_identify,      scidentify),
  270         DEVMETHOD(device_probe,         scprobe),
  271         DEVMETHOD(device_attach,        scattach),
  272         DEVMETHOD(device_suspend,       scsuspend),
  273         DEVMETHOD(device_resume,        scresume),
  274         { 0, 0 }
  275 };
  276 
  277 static driver_t sc_driver = {
  278         SC_DRIVER_NAME,
  279         sc_methods,
  280         sizeof(sc_softc_t),
  281 };
  282 
  283 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