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: releng/7.4/sys/isa/syscons_isa.c 190091 2009-03-19 17:46:51Z jhb $");
   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 #include "opt_xbox.h"
   66 
   67 #ifdef XBOX
   68 #include <machine/xbox.h>
   69 #endif
   70 
   71 static devclass_t       sc_devclass;
   72 
   73 static sc_softc_t main_softc;
   74 #ifdef SC_NO_SUSPEND_VTYSWITCH
   75 static int sc_no_suspend_vtswitch = 1;
   76 #else
   77 static int sc_no_suspend_vtswitch = 0;
   78 #endif
   79 static int sc_cur_scr;
   80 
   81 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
   82 SYSCTL_DECL(_hw_syscons);
   83 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   84         &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   85 
   86 static void
   87 scidentify (driver_t *driver, device_t parent)
   88 {
   89         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   90 }
   91 
   92 static int
   93 scprobe(device_t dev)
   94 {
   95         /* No pnp support */
   96         if (isa_get_vendorid(dev))
   97                 return (ENXIO);
   98 
   99         device_set_desc(dev, "System console");
  100         return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
  101 }
  102 
  103 static int
  104 scattach(device_t dev)
  105 {
  106 
  107         return (sc_attach_unit(device_get_unit(dev), device_get_flags(dev) |
  108             SC_AUTODETECT_KBD));
  109 }
  110 
  111 static int
  112 scsuspend(device_t dev)
  113 {
  114         int             retry = 10;
  115         sc_softc_t      *sc;
  116 
  117         sc = &main_softc;
  118 
  119         if (sc->cur_scp == NULL)
  120                 return (0);
  121 
  122         sc_cur_scr = sc->cur_scp->index;
  123 
  124         if (sc_no_suspend_vtswitch)
  125                 return (0);
  126 
  127         do {
  128                 sc_switch_scr(sc, 0);
  129                 if (!sc->switch_in_progress) {
  130                         break;
  131                 }
  132                 pause("scsuspend", hz);
  133         } while (retry--);
  134 
  135         return (0);
  136 }
  137 
  138 static int
  139 scresume(device_t dev)
  140 {
  141         sc_softc_t      *sc;
  142 
  143         if (sc_no_suspend_vtswitch)
  144                 return (0);
  145 
  146         sc = &main_softc;
  147         sc_switch_scr(sc, sc_cur_scr);
  148 
  149         return (0);
  150 }
  151 
  152 int
  153 sc_max_unit(void)
  154 {
  155         return devclass_get_maxunit(sc_devclass);
  156 }
  157 
  158 sc_softc_t
  159 *sc_get_softc(int unit, int flags)
  160 {
  161         sc_softc_t *sc;
  162 
  163         if (unit < 0)
  164                 return NULL;
  165         if (flags & SC_KERNEL_CONSOLE) {
  166                 /* FIXME: clear if it is wired to another unit! */
  167                 sc = &main_softc;
  168         } else {
  169                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
  170                 if (sc == NULL)
  171                         return NULL;
  172         }
  173         sc->unit = unit;
  174         if (!(sc->flags & SC_INIT_DONE)) {
  175                 sc->keyboard = -1;
  176                 sc->adapter = -1;
  177                 sc->cursor_char = SC_CURSOR_CHAR;
  178                 sc->mouse_char = SC_MOUSE_CHAR;
  179         }
  180         return sc;
  181 }
  182 
  183 sc_softc_t
  184 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  185 {
  186         sc_softc_t *sc;
  187         int units;
  188         int i;
  189 
  190         sc = &main_softc;
  191         if (((adp == NULL) || (adp == sc->adp))
  192             && ((kbd == NULL) || (kbd == sc->kbd)))
  193                 return sc;
  194         units = devclass_get_maxunit(sc_devclass);
  195         for (i = 0; i < units; ++i) {
  196                 sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
  197                 if (sc == NULL)
  198                         continue;
  199                 if (((adp == NULL) || (adp == sc->adp))
  200                     && ((kbd == NULL) || (kbd == sc->kbd)))
  201                         return sc;
  202         }
  203         return NULL;
  204 }
  205 
  206 int
  207 sc_get_cons_priority(int *unit, int *flags)
  208 {
  209         const char *at;
  210         int u, f;
  211 
  212 #ifdef XBOX
  213         /*
  214          * The XBox Loader does not support hints, which makes our initial
  215          * console probe fail. Therefore, if an XBox is found, we hardcode the
  216          * existence of the console, as it is always there anyway.
  217          */
  218         if (arch_i386_is_xbox) {
  219                 *unit = 0;
  220                 *flags = SC_KERNEL_CONSOLE;
  221                 return CN_INTERNAL;
  222         }
  223 #endif
  224 
  225         *unit = -1;
  226         for (u = 0; u < 16; u++) {
  227                 if (resource_disabled(SC_DRIVER_NAME, u))
  228                         continue;
  229                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  230                         continue;
  231                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  232                         f = 0;
  233                 if (f & SC_KERNEL_CONSOLE) {
  234                         /* the user designates this unit to be the console */
  235                         *unit = u;
  236                         *flags = f;
  237                         break;
  238                 }
  239                 if (*unit < 0) {
  240                         /* ...otherwise remember the first found unit */
  241                         *unit = u;
  242                         *flags = f;
  243                 }
  244         }
  245         if (*unit < 0) {
  246                 *unit = 0;
  247                 *flags = 0;
  248         }
  249 #if 0
  250         return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
  251 #endif
  252         return CN_INTERNAL;
  253 }
  254 
  255 void
  256 sc_get_bios_values(bios_values_t *values)
  257 {
  258 #if defined(__i386__) || defined(__amd64__)
  259         u_int8_t shift;
  260 
  261         values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
  262         values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
  263         shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
  264         values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
  265                                | ((shift & BIOS_NLKED) ? NLKED : 0)
  266                                | ((shift & BIOS_SLKED) ? SLKED : 0)
  267                                | ((shift & BIOS_ALKED) ? ALKED : 0);
  268 #else
  269         values->cursor_start = 0;
  270         values->cursor_end = 32;
  271         values->shift_state = 0;
  272 #endif
  273         values->bell_pitch = BELL_PITCH;
  274 }
  275 
  276 int
  277 sc_tone(int herz)
  278 {
  279 #if defined(__i386__) || defined(__amd64__)
  280         if (herz) {
  281                 /* set command for counter 2, 2 byte write */
  282                 if (timer_spkr_acquire())
  283                         return EBUSY;
  284                 /* set pitch */
  285                 spkr_set_pitch(timer_freq / herz);
  286                 /* enable counter 2 output to speaker */
  287                 ppi_spkr_on();
  288         } else {
  289                 /* disable counter 2 output to speaker */
  290                 ppi_spkr_off();
  291                 timer_spkr_release();
  292         }
  293 #endif
  294 
  295         return 0;
  296 }
  297 
  298 static device_method_t sc_methods[] = {
  299         DEVMETHOD(device_identify,      scidentify),
  300         DEVMETHOD(device_probe,         scprobe),
  301         DEVMETHOD(device_attach,        scattach),
  302         DEVMETHOD(device_suspend,       scsuspend),
  303         DEVMETHOD(device_resume,        scresume),
  304         { 0, 0 }
  305 };
  306 
  307 static driver_t sc_driver = {
  308         SC_DRIVER_NAME,
  309         sc_methods,
  310         sizeof(sc_softc_t),
  311 };
  312 
  313 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);

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