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: stable/8/sys/isa/syscons_isa.c 210303 2010-07-20 18:28:34Z jkim $");
   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 #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
   58 
   59 #include <dev/syscons/syscons.h>
   60 
   61 #include <isa/isavar.h>
   62 
   63 #include "opt_xbox.h"
   64 
   65 #ifdef XBOX
   66 #include <machine/xbox.h>
   67 #endif
   68 
   69 static devclass_t       sc_devclass;
   70 
   71 static sc_softc_t       main_softc;
   72 #ifdef SC_NO_SUSPEND_VTYSWITCH
   73 static int sc_no_suspend_vtswitch = 1;
   74 #else
   75 static int sc_no_suspend_vtswitch = 0;
   76 #endif
   77 static int sc_cur_scr;
   78 
   79 TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", &sc_no_suspend_vtswitch);
   80 SYSCTL_DECL(_hw_syscons);
   81 SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
   82     &sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
   83 
   84 static void
   85 scidentify(driver_t *driver, device_t parent)
   86 {
   87 
   88         BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
   89 }
   90 
   91 static int
   92 scprobe(device_t dev)
   93 {
   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         if (sc->suspend_in_progress == 0) {
  123                 sc_cur_scr = sc->cur_scp->index;
  124                 if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
  125                         do {
  126                                 sc_switch_scr(sc, 0);
  127                                 if (!sc->switch_in_progress)
  128                                         break;
  129                                 pause("scsuspend", hz);
  130                         } while (retry--);
  131         }
  132         sc->suspend_in_progress++;
  133 
  134         return (0);
  135 }
  136 
  137 static int
  138 scresume(device_t dev)
  139 {
  140         sc_softc_t      *sc;
  141 
  142         sc = &main_softc;
  143 
  144         if (sc->cur_scp == NULL)
  145                 return (0);
  146 
  147         sc->suspend_in_progress--;
  148         if (sc->suspend_in_progress == 0) {
  149                 if (!sc_no_suspend_vtswitch && sc_cur_scr != 0)
  150                         sc_switch_scr(sc, sc_cur_scr);
  151                 else
  152                         mark_all(sc->cur_scp);
  153         }
  154 
  155         return (0);
  156 }
  157 
  158 int
  159 sc_max_unit(void)
  160 {
  161 
  162         return (devclass_get_maxunit(sc_devclass));
  163 }
  164 
  165 sc_softc_t
  166 *sc_get_softc(int unit, int flags)
  167 {
  168         sc_softc_t *sc;
  169 
  170         if (unit < 0)
  171                 return (NULL);
  172         if ((flags & SC_KERNEL_CONSOLE) != 0) {
  173                 /* FIXME: clear if it is wired to another unit! */
  174                 sc = &main_softc;
  175         } else {
  176                 sc = device_get_softc(devclass_get_device(sc_devclass, unit));
  177                 if (sc == NULL)
  178                         return (NULL);
  179         }
  180         sc->unit = unit;
  181         if ((sc->flags & SC_INIT_DONE) == 0) {
  182                 sc->keyboard = -1;
  183                 sc->adapter = -1;
  184                 sc->cursor_char = SC_CURSOR_CHAR;
  185                 sc->mouse_char = SC_MOUSE_CHAR;
  186         }
  187         return (sc);
  188 }
  189 
  190 sc_softc_t
  191 *sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
  192 {
  193         sc_softc_t *sc;
  194         int i;
  195         int units;
  196 
  197         sc = &main_softc;
  198         if ((adp == NULL || adp == sc->adp) &&
  199             (kbd == NULL || kbd == sc->kbd))
  200                 return (sc);
  201         units = devclass_get_maxunit(sc_devclass);
  202         for (i = 0; i < units; ++i) {
  203                 sc = device_get_softc(devclass_get_device(sc_devclass, i));
  204                 if (sc == NULL)
  205                         continue;
  206                 if ((adp == NULL || adp == sc->adp) &&
  207                     (kbd == NULL || kbd == sc->kbd))
  208                         return (sc);
  209         }
  210         return (NULL);
  211 }
  212 
  213 int
  214 sc_get_cons_priority(int *unit, int *flags)
  215 {
  216         const char *at;
  217         int f, u;
  218 
  219 #ifdef XBOX
  220         /*
  221          * The XBox Loader does not support hints, which makes our initial
  222          * console probe fail. Therefore, if an XBox is found, we hardcode the
  223          * existence of the console, as it is always there anyway.
  224          */
  225         if (arch_i386_is_xbox) {
  226                 *unit = 0;
  227                 *flags = SC_KERNEL_CONSOLE;
  228                 return (CN_INTERNAL);
  229         }
  230 #endif
  231 
  232         *unit = -1;
  233         for (u = 0; u < 16; u++) {
  234                 if (resource_disabled(SC_DRIVER_NAME, u))
  235                         continue;
  236                 if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
  237                         continue;
  238                 if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
  239                         f = 0;
  240                 if (f & SC_KERNEL_CONSOLE) {
  241                         /* the user designates this unit to be the console */
  242                         *unit = u;
  243                         *flags = f;
  244                         break;
  245                 }
  246                 if (*unit < 0) {
  247                         /* ...otherwise remember the first found unit */
  248                         *unit = u;
  249                         *flags = f;
  250                 }
  251         }
  252         if (*unit < 0) {
  253                 *unit = 0;
  254                 *flags = 0;
  255         }
  256 #if 0
  257         return ((*flags & SC_KERNEL_CONSOLE) != 0 ? CN_INTERNAL : CN_NORMAL);
  258 #endif
  259         return (CN_INTERNAL);
  260 }
  261 
  262 void
  263 sc_get_bios_values(bios_values_t *values)
  264 {
  265 #if defined(__i386__) || defined(__amd64__)
  266         uint8_t shift;
  267 
  268         values->cursor_start = *(uint8_t *)BIOS_PADDRTOVADDR(0x461);
  269         values->cursor_end = *(uint8_t *)BIOS_PADDRTOVADDR(0x460);
  270         shift = *(uint8_t *)BIOS_PADDRTOVADDR(0x417);
  271         values->shift_state = ((shift & BIOS_CLKED) != 0 ? CLKED : 0) |
  272             ((shift & BIOS_NLKED) != 0 ? NLKED : 0) |
  273             ((shift & BIOS_SLKED) != 0 ? SLKED : 0) |
  274             ((shift & BIOS_ALKED) != 0 ? ALKED : 0);
  275 #else
  276         values->cursor_start = 0;
  277         values->cursor_end = 32;
  278         values->shift_state = 0;
  279 #endif
  280         values->bell_pitch = BELL_PITCH;
  281 }
  282 
  283 int
  284 sc_tone(int herz)
  285 {
  286 
  287 #if defined(HAS_TIMER_SPKR)
  288         if (herz) {
  289                 if (timer_spkr_acquire())
  290                         return (EBUSY);
  291                 timer_spkr_setfreq(herz);
  292         } else
  293                 timer_spkr_release();
  294 #endif
  295 
  296         return (0);
  297 }
  298 
  299 static device_method_t sc_methods[] = {
  300         DEVMETHOD(device_identify,      scidentify),
  301         DEVMETHOD(device_probe,         scprobe),
  302         DEVMETHOD(device_attach,        scattach),
  303         DEVMETHOD(device_suspend,       scsuspend),
  304         DEVMETHOD(device_resume,        scresume),
  305         { 0, 0 }
  306 };
  307 
  308 static driver_t sc_driver = {
  309         SC_DRIVER_NAME,
  310         sc_methods,
  311         sizeof(sc_softc_t),
  312 };
  313 
  314 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
  315 
  316 static devclass_t       scpm_devclass;
  317 
  318 static void
  319 scpm_identify(driver_t *driver, device_t parent)
  320 {
  321 
  322         device_add_child(parent, "scpm", 0);
  323 }
  324 
  325 static int
  326 scpm_probe(device_t dev)
  327 {
  328 
  329         device_set_desc(dev, SC_DRIVER_NAME " suspend/resume");
  330         device_quiet(dev);
  331 
  332         return (BUS_PROBE_DEFAULT);
  333 }
  334 
  335 static int
  336 scpm_attach(device_t dev)
  337 {
  338 
  339         bus_generic_probe(dev);
  340         bus_generic_attach(dev);
  341 
  342         return (0);
  343 }
  344 
  345 static int
  346 scpm_suspend(device_t dev)
  347 {
  348         int error;
  349 
  350         error = bus_generic_suspend(dev);
  351         if (error != 0)
  352                 return (error);
  353 
  354         return (scsuspend(dev));
  355 }
  356 
  357 static int
  358 scpm_resume(device_t dev)
  359 {
  360 
  361         scresume(dev);
  362 
  363         return (bus_generic_resume(dev));
  364 }
  365 
  366 static device_method_t scpm_methods[] = {
  367         DEVMETHOD(device_identify,      scpm_identify),
  368         DEVMETHOD(device_probe,         scpm_probe),
  369         DEVMETHOD(device_attach,        scpm_attach),
  370         DEVMETHOD(device_suspend,       scpm_suspend),
  371         DEVMETHOD(device_resume,        scpm_resume),
  372         { 0, 0 }
  373 };
  374 
  375 static driver_t scpm_driver = {
  376         "scpm",
  377         scpm_methods,
  378         0
  379 };
  380 
  381 DRIVER_MODULE(scpm, vgapm, scpm_driver, scpm_devclass, 0, 0);

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