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/isa/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("$FreeBSD$");
   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/pc/bios.h>
   47 
   48 #include <vm/vm.h>
   49 #include <vm/pmap.h>
   50 #include <vm/vm_param.h>
   51 
   52 #include <i386/isa/timerreg.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/isareg.h>
   64 #include <isa/isavar.h>
   65 
   66 static devclass_t       sc_devclass;
   67 
   68 static sc_softc_t main_softc;
   69 #ifdef SC_NO_SUSPEND_VTYSWITCH
   70 static int sc_no_suspend_vtswitch = 1;
   71 #else
   72 static int sc_no_suspend_vtswitch = 0;
   73 #endif
   74 static int sc_cur_scr;
   75 
   76 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
   77 SYSCTL_DECL(_hw_syscons);
   78 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   79         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   80 
   81 static void
   82 scidentify (driver_t *driver, device_t parent)
   83 {
   84         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   85 }
   86 
   87 static int
   88 scprobe(device_t dev)
   89 {
   90         /* No pnp support */
   91         if (isa_get_vendorid(dev))
   92                 return (ENXIO);
   93 
   94         device_set_desc(dev, "System console");
   95         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
   96 }
   97 
   98 static int
   99 scattach(device_t dev)
  100 {
  101         return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
  102 }
  103 
  104 static int
  105 scsuspend(device_t dev)
  106 {
  107         int             retry = 10;
  108         static int      dummy;
  109         sc_softc_t      *sc;
  110 
  111         sc = &main_softc;
  112 
  113         if (sc->cur_scp == NULL)
  114                 return (0);
  115 
  116         sc_cur_scr = sc->cur_scp->index;
  117 
  118         if (sc_no_suspend_vtswitch)
  119                 return (0);
  120 
  121         do {
  122                 sc_switch_scr(sc, 0);
  123                 if (!sc->switch_in_progress) {
  124                         break;
  125                 }
  126                 tsleep(&dummy, 0, "scsuspend", 100);
  127         } while (retry--);
  128 
  129         return (0);
  130 }
  131 
  132 static int
  133 scresume(device_t dev)
  134 {
  135         sc_softc_t      *sc;
  136 
  137         if (sc_no_suspend_vtswitch)
  138                 return (0);
  139 
  140         sc = &main_softc;
  141         sc_switch_scr(sc, sc_cur_scr);
  142 
  143         return (0);
  144 }
  145 
  146 int
  147 sc_max_unit(void)
  148 {
  149         return devclass_get_maxunit(sc_devclass);
  150 }
  151 
  152 sc_softc_t
  153 *sc_get_softc(int unit, int flags)
  154 {
  155         sc_softc_t *sc;
  156 
  157         if (unit < 0)
  158                 return NULL;
  159         if (flags & SC_KERNEL_CONSOLE) {
  160                 /* FIXME: clear if it is wired to another unit! */
  161                 sc = &main_softc;
  162         } else {
  163                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  164                 if (sc == NULL)
  165                         return NULL;
  166         }
  167         sc->unit = unit;
  168         if (!(sc->flags & SC_INIT_DONE)) {
  169                 sc->keyboard = -1;
  170                 sc->adapter = -1;
  171                 sc->cursor_char = SC_CURSOR_CHAR;
  172                 sc->mouse_char = SC_MOUSE_CHAR;
  173         }
  174         return sc;
  175 }
  176 
  177 sc_softc_t
  178 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  179 {
  180         sc_softc_t *sc;
  181         int units;
  182         int i;
  183 
  184         sc = &main_softc;
  185         if (((adp == NULL) || (adp == sc->adp))
  186             && ((kbd == NULL) || (kbd == sc->kbd)))
  187                 return sc;
  188         units = devclass_get_maxunit(sc_devclass);
  189         for (i = 0; i < units; ++i) {
  190                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  191                 if (sc == NULL)
  192                         continue;
  193                 if (((adp == NULL) || (adp == sc->adp))
  194                     && ((kbd == NULL) || (kbd == sc->kbd)))
  195                         return sc;
  196         }
  197         return NULL;
  198 }
  199 
  200 int
  201 sc_get_cons_priority(int *unit, int *flags)
  202 {
  203         const char *at;
  204         int u, f;
  205 
  206         *unit = -1;
  207         for (u = 0; u < 16; u++) {
  208                 if (resource_disabled(SC_DRIVER_NAME, u))
  209                         continue;
  210                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  211                         continue;
  212                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  213                         f = 0;
  214                 if (f & SC_KERNEL_CONSOLE) {
  215                         /* the user designates this unit to be the console */
  216                         *unit = u;
  217                         *flags = f;
  218                         break;
  219                 }
  220                 if (*unit < 0) {
  221                         /* ...otherwise remember the first found unit */
  222                         *unit = u;
  223                         *flags = f;
  224                 }
  225         }
  226         if (*unit < 0)
  227                 return CN_DEAD;
  228 #if 0
  229         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  230 #endif
  231         return CN_INTERNAL;
  232 }
  233 
  234 void
  235 sc_get_bios_values(bios_values_t *values)
  236 {
  237 #if defined(__i386__) || defined(__amd64__)
  238         u_int8_t shift;
  239 
  240         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  241         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  242         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  243         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  244                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  245                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  246                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  247 #else
  248         values->cursor_start = 0;
  249         values->cursor_end = 32;
  250         values->shift_state = 0;
  251 #endif
  252         values->bell_pitch = BELL_PITCH;
  253 }
  254 
  255 int
  256 sc_tone(int herz)
  257 {
  258 #if defined(__i386__) || defined(__amd64__)
  259         int pitch;
  260 
  261         if (herz) {
  262                 /* set command for counter 2, 2 byte write */
  263                 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
  264                         return EBUSY;
  265                 /* set pitch */
  266                 pitch = timer_freq/herz;
  267                 outb(TIMER_CNTR2, pitch);
  268                 outb(TIMER_CNTR2, pitch >> 8);
  269                 /* enable counter 2 output to speaker */
  270                 outb(IO_PPI, inb(IO_PPI) | 3);
  271         } else {
  272                 /* disable counter 2 output to speaker */
  273                 outb(IO_PPI, inb(IO_PPI) & 0xFC);
  274                 release_timer2();
  275         }
  276 #endif
  277 
  278         return 0;
  279 }
  280 
  281 static device_method_t sc_methods[] = {
  282         DEVMETHOD(device_identify,      scidentify),
  283         DEVMETHOD(device_probe,         scprobe),
  284         DEVMETHOD(device_attach,        scattach),
  285         DEVMETHOD(device_suspend,       scsuspend),
  286         DEVMETHOD(device_resume,        scresume),
  287         { 0, 0 }
  288 };
  289 
  290 static driver_t sc_driver = {
  291         SC_DRIVER_NAME,
  292         sc_methods,
  293         sizeof(sc_softc_t),
  294 };
  295 
  296 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);

Cache object: 7d5e499d4d44df1ad4f832d03c7d6ca2


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