/*-
 * 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.
 *
 * $FreeBSD: src/sys/isa/syscons_isa.c,v 1.11.2.2 2001/08/01 10:42:28 yokota Exp $
 */

#include "opt_syscons.h"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/systimer.h>
#include <sys/bus.h>
#include <sys/cons.h>

#include <machine/console.h>
#include <machine/framebuffer.h>

#include <dev/misc/syscons/syscons.h>

static devclass_t       sc_devclass;

static void     scidentify(driver_t *driver, device_t parent);
static int      scprobe(device_t dev);
static int      scattach(device_t dev);

static device_method_t sc_methods[] = {
        DEVMETHOD(device_identify,      scidentify),
        DEVMETHOD(device_probe,         scprobe),
        DEVMETHOD(device_attach,        scattach),
        DEVMETHOD_END
};

static driver_t sc_driver = {
        SC_DRIVER_NAME,
        sc_methods,
        sizeof(sc_softc_t),
};

static sc_softc_t main_softc;

static void
scidentify(driver_t *driver, device_t parent)
{
        device_t child;
        int i, u;
        int f;

        for (i = -1; (i = resource_locate(i, SC_DRIVER_NAME)) >= 0;) {
                u = resource_query_unit(i);
                if (u < 0)
                        continue;
                if (resource_disabled(SC_DRIVER_NAME, u))
                        continue;
                if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
                        f = 0;
                child = BUS_ADD_CHILD(parent, parent, 0, "sc", u);
                if (child == NULL)
                        panic("%s", __func__);
                device_set_flags(child, f);
        }
}

static int
scprobe(device_t dev)
{
        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));
}

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)
{
        int u, f;
        int i;
        int have_efi_fb = (probe_efi_fb(1) == 0);

        *unit = -1;
        for (i = -1; (i = resource_locate(i, SC_DRIVER_NAME)) >= 0;) {
                u = resource_query_unit(i);
                if (resource_disabled(SC_DRIVER_NAME, u))
                        continue;
                if (resource_int_value(SC_DRIVER_NAME, u, "flags", &f) != 0)
                        f = 0;
                /* We prefer the EFI Framebuffer over other video devices */
                if (have_efi_fb && !(f & SC_EFI_FB))
                        continue;
                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 ((i < 0) && (*unit < 0))
                return CN_DEAD;
        if (!have_efi_fb)
                *flags &= ~SC_EFI_FB;
#if 0
        return ((*flags & SC_KERNEL_CONSOLE) ? CN_INTERNAL : CN_NORMAL);
#endif
        return CN_INTERNAL;
}

void
sc_get_bios_values(bios_values_t *values)
{
        values->cursor_start = 0;
        values->cursor_end = 32;
        values->shift_state = 0;
        values->bell_pitch = BELL_PITCH;
}

int
sc_tone(int hertz)
{
        return EBUSY;
#if 0
        /* XXX use sound device if available */
        return 0;
#endif
}

DRIVER_MODULE(sc, nexus, sc_driver, sc_devclass, NULL, NULL);