sys/isa/syscons_isa.c

   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 #ifdef __i386__
  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 /* __i386__ */
  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 #ifdef __i386__
 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         values->bell_pitch = BELL_PITCH;
 248 #else /* !__i386__ */
 249         values->cursor_start = 0;
 250         values->cursor_end = 32;
 251         values->shift_state = 0;
 252         values->bell_pitch = BELL_PITCH;
 253 #endif /* __i386__ */
 254 }
 255
 256 int
 257 sc_tone(int herz)
 258 {
 259 #ifdef __i386__
 260         int pitch;
 261
 262         if (herz) {
 263                 /* set command for counter 2, 2 byte write */
 264                 if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
 265                         return EBUSY;
 266                 /* set pitch */
 267                 pitch = timer_freq/herz;
 268                 outb(TIMER_CNTR2, pitch);
 269                 outb(TIMER_CNTR2, pitch >> 8);
 270                 /* enable counter 2 output to speaker */
 271                 outb(IO_PPI, inb(IO_PPI) | 3);
 272         } else {
 273                 /* disable counter 2 output to speaker */
 274                 outb(IO_PPI, inb(IO_PPI) & 0xFC);
 275                 release_timer2();
 276         }
 277 #endif /* __i386__ */
 278
 279         return 0;
 280 }
 281
 282 static device_method_t sc_methods[] = {
 283         DEVMETHOD(device_identify,      scidentify),
 284         DEVMETHOD(device_probe,         scprobe),
 285         DEVMETHOD(device_attach,        scattach),
 286         DEVMETHOD(device_suspend,       scsuspend),
 287         DEVMETHOD(device_resume,        scresume),
 288         { 0, 0 }
 289 };
 290
 291 static driver_t sc_driver = {
 292         SC_DRIVER_NAME,
 293         sc_methods,
 294         sizeof(sc_softc_t),
 295 };
 296
 297 DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);