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/5.1/sys/isa/syscons_isa.c 109279 2003-01-15 03:45:27Z mdodd $
   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 #include <sys/sysctl.h>
   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 #ifdef SC_NO_SUSPEND_VTYSWITCH
   68 static int sc_no_suspend_vtswitch = 1;
   69 #else
   70 static int sc_no_suspend_vtswitch = 0;
   71 #endif
   72 static int sc_cur_scr;
   73 
   74 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
   75 SYSCTL_DECL(_hw_syscons);
   76 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   77         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   78 
   79 static void
   80 scidentify (driver_t *driver, device_t parent)
   81 {
   82         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   83 }
   84 
   85 static int
   86 scprobe(device_t dev)
   87 {
   88         /* No pnp support */
   89         if (isa_get_vendorid(dev))
   90                 return (ENXIO);
   91 
   92         device_set_desc(dev, "System console");
   93         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   94 }
   95 
   96 static int
   97 scattach(device_t dev)
   98 {
   99         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
  100 }
  101 
  102 static int
  103 scsuspend(device_t dev)
  104 {
  105         int             retry = 10;
  106         static int      dummy;
  107         sc_softc_t      *sc;
  108 
  109         sc = &main_softc;
  110         sc_cur_scr = sc->cur_scp->index;
  111 
  112         if (sc_no_suspend_vtswitch)
  113                 return (0);
  114 
  115         do {
  116                 sc_switch_scr(sc, 0);
  117                 if (!sc->switch_in_progress) {
  118                         break;
  119                 }
  120                 tsleep(&dummy, 0, "scsuspend", 100);
  121         } while (retry--);
  122 
  123         return (0);
  124 }
  125 
  126 static int
  127 scresume(device_t dev)
  128 {
  129         sc_softc_t      *sc;
  130 
  131         if (sc_no_suspend_vtswitch)
  132                 return (0);
  133 
  134         sc = &main_softc;
  135         sc_switch_scr(sc, sc_cur_scr);
  136 
  137         return (0);
  138 }
  139 
  140 int
  141 sc_max_unit(void)
  142 {
  143         return devclass_get_maxunit(sc_devclass);
  144 }
  145 
  146 sc_softc_t
  147 *sc_get_softc(int unit, int flags)
  148 {
  149         sc_softc_t *sc;
  150 
  151         if (unit < 0)
  152                 return NULL;
  153         if (flags & SC_KERNEL_CONSOLE) {
  154                 /* FIXME: clear if it is wired to another unit! */
  155                 sc = &main_softc;
  156         } else {
  157                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  158                 if (sc == NULL)
  159                         return NULL;
  160         }
  161         sc->unit = unit;
  162         if (!(sc->flags & SC_INIT_DONE)) {
  163                 sc->keyboard = -1;
  164                 sc->adapter = -1;
  165                 sc->cursor_char = SC_CURSOR_CHAR;
  166                 sc->mouse_char = SC_MOUSE_CHAR;
  167         }
  168         return sc;
  169 }
  170 
  171 sc_softc_t
  172 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  173 {
  174         sc_softc_t *sc;
  175         int units;
  176         int i;
  177 
  178         sc = &main_softc;
  179         if (((adp == NULL) || (adp == sc->adp))
  180             && ((kbd == NULL) || (kbd == sc->kbd)))
  181                 return sc;
  182         units = devclass_get_maxunit(sc_devclass);
  183         for (i = 0; i < units; ++i) {
  184                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  185                 if (sc == NULL)
  186                         continue;
  187                 if (((adp == NULL) || (adp == sc->adp))
  188                     && ((kbd == NULL) || (kbd == sc->kbd)))
  189                         return sc;
  190         }
  191         return NULL;
  192 }
  193 
  194 int
  195 sc_get_cons_priority(int *unit, int *flags)
  196 {
  197         int disabled;
  198         const char *at;
  199         int u, f;
  200 
  201         *unit = -1;
  202         for (u = 0; u < 16; u++) {
  203                 if ((resource_int_value(SC_DRIVER_NAME, u, "disabled",
  204                                         &disabled) == 0) && disabled)
  205                         continue;
  206                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  207                         continue;
  208                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  209                         f = 0;
  210                 if (f & SC_KERNEL_CONSOLE) {
  211                         /* the user designates this unit to be the console */
  212                         *unit = u;
  213                         *flags = f;
  214                         break;
  215                 }
  216                 if (*unit < 0) {
  217                         /* ...otherwise remember the first found unit */
  218                         *unit = u;
  219                         *flags = f;
  220                 }
  221         }
  222         if (*unit < 0)
  223                 return CN_DEAD;
  224 #if 0
  225         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  226 #endif
  227         return CN_INTERNAL;
  228 }
  229 
  230 void
  231 sc_get_bios_values(bios_values_t *values)
  232 {
  233 #ifdef __i386__
  234         u_int8_t shift;
  235 
  236         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  237         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  238         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  239         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  240                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  241                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  242                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  243         values->bell_pitch = BELL_PITCH;
  244 #else /* !__i386__ */
  245         values->cursor_start = 0;
  246         values->cursor_end = 32;
  247         values->shift_state = 0;
  248         values->bell_pitch = BELL_PITCH;
  249 #endif /* __i386__ */
  250 }
  251 
  252 int
  253 sc_tone(int herz)
  254 {
  255 #ifdef __i386__
  256         int pitch;
  257 
  258         if (herz) {
  259                 /* set command for counter 2, 2 byte write */
  260                 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
  261                         return EBUSY;
  262                 /* set pitch */
  263                 pitch = timer_freq/herz;
  264                 outb(TIMER_CNTR2, pitch);
  265                 outb(TIMER_CNTR2, pitch >> 8);
  266                 /* enable counter 2 output to speaker */
  267                 outb(IO_PPI, inb(IO_PPI) | 3);
  268         } else {
  269                 /* disable counter 2 output to speaker */
  270                 outb(IO_PPI, inb(IO_PPI) & 0xFC);
  271                 release_timer2();
  272         }
  273 #endif /* __i386__ */
  274 
  275         return 0;
  276 }
  277 
  278 static device_method_t sc_methods[] = {
  279         DEVMETHOD(device_identify,      scidentify),
  280         DEVMETHOD(device_probe,         scprobe),
  281         DEVMETHOD(device_attach,        scattach),
  282         DEVMETHOD(device_suspend,       scsuspend),
  283         DEVMETHOD(device_resume,        scresume),
  284         { 0, 0 }
  285 };
  286 
  287 static driver_t sc_driver = {
  288         SC_DRIVER_NAME,
  289         sc_methods,
  290         sizeof(sc_softc_t),
  291 };
  292 
  293 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