ebfbcd612a
Rename timer0_real_max_count to i8254_real_max_count and make it static. Rename timer_freq to i8254_freq and make it a loader tunable.
310 lines
7.0 KiB
C
310 lines
7.0 KiB
C
/*-
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* Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer as
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* the first lines of this file unmodified.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_syscons.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/bus.h>
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#include <sys/cons.h>
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#include <sys/kbio.h>
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#include <sys/consio.h>
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#include <sys/sysctl.h>
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#if defined(__i386__) || defined(__amd64__)
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#include <machine/clock.h>
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#include <machine/md_var.h>
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#include <machine/ppireg.h>
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#include <machine/timerreg.h>
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#include <machine/pc/bios.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_param.h>
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#define BIOS_CLKED (1 << 6)
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#define BIOS_NLKED (1 << 5)
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#define BIOS_SLKED (1 << 4)
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#define BIOS_ALKED 0
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#endif
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#include <dev/syscons/syscons.h>
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#include <isa/isavar.h>
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#include "opt_xbox.h"
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#ifdef XBOX
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#include <machine/xbox.h>
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#endif
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static devclass_t sc_devclass;
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static sc_softc_t main_softc;
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#ifdef SC_NO_SUSPEND_VTYSWITCH
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static int sc_no_suspend_vtswitch = 1;
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#else
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static int sc_no_suspend_vtswitch = 0;
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#endif
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static int sc_cur_scr;
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TUNABLE_INT("hw.syscons.sc_no_suspend_vtswitch", (int *)&sc_no_suspend_vtswitch);
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SYSCTL_DECL(_hw_syscons);
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SYSCTL_INT(_hw_syscons, OID_AUTO, sc_no_suspend_vtswitch, CTLFLAG_RW,
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&sc_no_suspend_vtswitch, 0, "Disable VT switch before suspend.");
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static void
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scidentify (driver_t *driver, device_t parent)
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{
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BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, "sc", 0);
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}
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static int
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scprobe(device_t dev)
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{
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/* No pnp support */
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if (isa_get_vendorid(dev))
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return (ENXIO);
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device_set_desc(dev, "System console");
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return sc_probe_unit(device_get_unit(dev), device_get_flags(dev));
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}
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static int
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scattach(device_t dev)
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{
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return sc_attach_unit(device_get_unit(dev), device_get_flags(dev));
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}
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static int
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scsuspend(device_t dev)
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{
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int retry = 10;
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sc_softc_t *sc;
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sc = &main_softc;
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if (sc->cur_scp == NULL)
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return (0);
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sc_cur_scr = sc->cur_scp->index;
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if (sc_no_suspend_vtswitch)
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return (0);
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do {
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sc_switch_scr(sc, 0);
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if (!sc->switch_in_progress) {
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break;
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}
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pause("scsuspend", hz);
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} while (retry--);
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return (0);
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}
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static int
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scresume(device_t dev)
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{
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sc_softc_t *sc;
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if (sc_no_suspend_vtswitch)
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return (0);
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sc = &main_softc;
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sc_switch_scr(sc, sc_cur_scr);
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return (0);
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}
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int
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sc_max_unit(void)
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{
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return devclass_get_maxunit(sc_devclass);
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}
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sc_softc_t
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*sc_get_softc(int unit, int flags)
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{
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sc_softc_t *sc;
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if (unit < 0)
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return NULL;
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if (flags & SC_KERNEL_CONSOLE) {
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/* FIXME: clear if it is wired to another unit! */
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sc = &main_softc;
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} else {
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sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, unit));
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if (sc == NULL)
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return NULL;
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}
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sc->unit = unit;
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if (!(sc->flags & SC_INIT_DONE)) {
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sc->keyboard = -1;
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sc->adapter = -1;
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sc->cursor_char = SC_CURSOR_CHAR;
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sc->mouse_char = SC_MOUSE_CHAR;
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}
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return sc;
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}
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sc_softc_t
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*sc_find_softc(struct video_adapter *adp, struct keyboard *kbd)
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{
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sc_softc_t *sc;
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int units;
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int i;
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sc = &main_softc;
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if (((adp == NULL) || (adp == sc->adp))
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&& ((kbd == NULL) || (kbd == sc->kbd)))
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return sc;
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units = devclass_get_maxunit(sc_devclass);
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for (i = 0; i < units; ++i) {
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sc = (sc_softc_t *)device_get_softc(devclass_get_device(sc_devclass, i));
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if (sc == NULL)
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continue;
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if (((adp == NULL) || (adp == sc->adp))
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&& ((kbd == NULL) || (kbd == sc->kbd)))
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return sc;
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}
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return NULL;
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}
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int
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sc_get_cons_priority(int *unit, int *flags)
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{
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const char *at;
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int u, f;
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#ifdef XBOX
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/*
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* The XBox Loader does not support hints, which makes our initial
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* console probe fail. Therefore, if an XBox is found, we hardcode the
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* existence of the console, as it is always there anyway.
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*/
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if (arch_i386_is_xbox) {
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*unit = 0;
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*flags = SC_KERNEL_CONSOLE;
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return CN_INTERNAL;
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}
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#endif
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*unit = -1;
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for (u = 0; u < 16; u++) {
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if (resource_disabled(SC_DRIVER_NAME, u))
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continue;
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if (resource_string_value(SC_DRIVER_NAME, u, "at", &at) != 0)
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continue;
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if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
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f = 0;
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if (f & SC_KERNEL_CONSOLE) {
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/* the user designates this unit to be the console */
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*unit = u;
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*flags = f;
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break;
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}
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if (*unit < 0) {
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/* ...otherwise remember the first found unit */
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*unit = u;
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*flags = f;
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}
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}
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if (*unit < 0)
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return CN_DEAD;
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#if 0
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return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
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#endif
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return CN_INTERNAL;
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}
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void
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sc_get_bios_values(bios_values_t *values)
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{
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#if defined(__i386__) || defined(__amd64__)
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u_int8_t shift;
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values->cursor_start = *(u_int8_t *)BIOS_PADDRTOVADDR(0x461);
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values->cursor_end = *(u_int8_t *)BIOS_PADDRTOVADDR(0x460);
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shift = *(u_int8_t *)BIOS_PADDRTOVADDR(0x417);
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values->shift_state = ((shift & BIOS_CLKED) ? CLKED : 0)
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| ((shift & BIOS_NLKED) ? NLKED : 0)
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| ((shift & BIOS_SLKED) ? SLKED : 0)
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| ((shift & BIOS_ALKED) ? ALKED : 0);
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#else
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values->cursor_start = 0;
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values->cursor_end = 32;
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values->shift_state = 0;
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#endif
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values->bell_pitch = BELL_PITCH;
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}
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int
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sc_tone(int herz)
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{
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#if defined(__i386__) || defined(__amd64__)
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if (herz) {
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/* set command for counter 2, 2 byte write */
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if (timer_spkr_acquire())
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return EBUSY;
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/* set pitch */
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spkr_set_pitch(i8254_freq / herz);
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/* enable counter 2 output to speaker */
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ppi_spkr_on();
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} else {
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/* disable counter 2 output to speaker */
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ppi_spkr_off();
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timer_spkr_release();
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}
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#endif
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return 0;
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}
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static device_method_t sc_methods[] = {
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DEVMETHOD(device_identify, scidentify),
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DEVMETHOD(device_probe, scprobe),
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DEVMETHOD(device_attach, scattach),
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DEVMETHOD(device_suspend, scsuspend),
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DEVMETHOD(device_resume, scresume),
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{ 0, 0 }
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};
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static driver_t sc_driver = {
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SC_DRIVER_NAME,
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sc_methods,
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sizeof(sc_softc_t),
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};
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DRIVER_MODULE(sc, isa, sc_driver, sc_devclass, 0, 0);
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