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  * $FreeBSD$
  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);