FreeBSD-5.3/sys/isa/syscons_isa.c
/*-
* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer as
* the first lines of this file unmodified.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/isa/syscons_isa.c,v 1.25 2004/06/10 20:31:00 jhb Exp $");
#include "opt_syscons.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/kbio.h>
#include <sys/consio.h>
#include <sys/sysctl.h>
#ifdef __i386__
#include <machine/clock.h>
#include <machine/md_var.h>
#include <machine/pc/bios.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#include <i386/isa/timerreg.h>
#define BIOS_CLKED (1 << 6)
#define BIOS_NLKED (1 << 5)
#define BIOS_SLKED (1 << 4)
#define BIOS_ALKED 0
#endif /* __i386__ */
#include <dev/syscons/syscons.h>
#include <isa/isareg.h>
#include <isa/isavar.h>
static devclass_t sc_devclass;
static sc_softc_t main_softc;
#ifdef SC_NO_SUSPEND_VTYSWITCH
static int sc_no_suspend_vtswitch = 1;
#else
static int sc_no_suspend_vtswitch = 0;
#endif
static int sc_cur_scr;
TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
SYSCTL_DECL(_hw_syscons);
SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
static void
scidentify (driver_t *driver, device_t parent)
{
BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
}
static int
scprobe(device_t dev)
{
/* No pnp support */
if (isa_get_vendorid(dev))
return (ENXIO);
device_set_desc(dev, "System console");
return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
}
static int
scattach(device_t dev)
{
return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
}
static int
scsuspend(device_t dev)
{
int retry = 10;
static int dummy;
sc_softc_t *sc;
sc = &main_softc;
if (sc->cur_scp == NULL)
return (0);
sc_cur_scr = sc->cur_scp->index;
if (sc_no_suspend_vtswitch)
return (0);
do {
sc_switch_scr(sc, 0);
if (!sc->switch_in_progress) {
break;
}
tsleep(&dummy, 0, "scsuspend", 100);
} while (retry--);
return (0);
}
static int
scresume(device_t dev)
{
sc_softc_t *sc;
if (sc_no_suspend_vtswitch)
return (0);
sc = &main_softc;
sc_switch_scr(sc, sc_cur_scr);
return (0);
}
int
sc_max_unit(void)
{
return devclass_get_maxunit(sc_devclass);
}
sc_softc_t
*sc_get_softc(int unit, int flags)
{
sc_softc_t *sc;
if (unit < 0)
return NULL;
if (flags & SC_KERNEL_CONSOLE) {
/* FIXME: clear if it is wired to another unit! */
sc = &main_softc;
} else {
sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
if (sc == NULL)
return NULL;
}
sc->unit = unit;
if (!(sc->flags & SC_INIT_DONE)) {
sc->keyboard = -1;
sc->adapter = -1;
sc->cursor_char = SC_CURSOR_CHAR;
sc->mouse_char = SC_MOUSE_CHAR;
}
return sc;
}
sc_softc_t
*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
{
sc_softc_t *sc;
int units;
int i;
sc = &main_softc;
if (((adp == NULL) || (adp == sc->adp))
&& ((kbd == NULL) || (kbd == sc->kbd)))
return sc;
units = devclass_get_maxunit(sc_devclass);
for (i = 0; i < units; ++i) {
sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
if (sc == NULL)
continue;
if (((adp == NULL) || (adp == sc->adp))
&& ((kbd == NULL) || (kbd == sc->kbd)))
return sc;
}
return NULL;
}
int
sc_get_cons_priority(int *unit, int *flags)
{
const char *at;
int u, f;
*unit = -1;
for (u = 0; u < 16; u++) {
if (resource_disabled(SC_DRIVER_NAME, u))
continue;
if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
continue;
if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
f = 0;
if (f & SC_KERNEL_CONSOLE) {
/* the user designates this unit to be the console */
*unit = u;
*flags = f;
break;
}
if (*unit < 0) {
/* ...otherwise remember the first found unit */
*unit = u;
*flags = f;
}
}
if (*unit < 0)
return CN_DEAD;
#if 0
return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
#endif
return CN_INTERNAL;
}
void
sc_get_bios_values(bios_values_t *values)
{
#ifdef __i386__
u_int8_t shift;
values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
| ((shift & BIOS_NLKED) ? NLKED : 0)
| ((shift & BIOS_SLKED) ? SLKED : 0)
| ((shift & BIOS_ALKED) ? ALKED : 0);
values->bell_pitch = BELL_PITCH;
#else /* !__i386__ */
values->cursor_start = 0;
values->cursor_end = 32;
values->shift_state = 0;
values->bell_pitch = BELL_PITCH;
#endif /* __i386__ */
}
int
sc_tone(int herz)
{
#ifdef __i386__
int pitch;
if (herz) {
/* set command for counter 2, 2 byte write */
if (acquire_timer2(TIMER_16BIT | TIMER_SQWAVE))
return EBUSY;
/* set pitch */
pitch = timer_freq/herz;
outb(TIMER_CNTR2, pitch);
outb(TIMER_CNTR2, pitch >> 8);
/* enable counter 2 output to speaker */
outb(IO_PPI, inb(IO_PPI) | 3);
} else {
/* disable counter 2 output to speaker */
outb(IO_PPI, inb(IO_PPI) & 0xFC);
release_timer2();
}
#endif /* __i386__ */
return 0;
}
static device_method_t sc_methods[] = {
DEVMETHOD(device_identify, scidentify),
DEVMETHOD(device_probe, scprobe),
DEVMETHOD(device_attach, scattach),
DEVMETHOD(device_suspend, scsuspend),
DEVMETHOD(device_resume, scresume),
{ 0, 0 }
};
static driver_t sc_driver = {
SC_DRIVER_NAME,
sc_methods,
sizeof(sc_softc_t),
};
DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);