/* $OpenBSD: mcclock_ioasic.c,v 1.9 2025/06/29 15:55:22 miod Exp $ */
/* $NetBSD: mcclock_ioasic.c,v 1.9 2000/07/04 02:37:51 nisimura Exp $ */

/*
 * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
 * All rights reserved.
 *
 * Author: Chris G. Demetriou
 *
 * Permission to use, copy, modify and distribute this software and
 * its documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 */

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <dev/dec/clockvar.h>
#include <dev/dec/mcclockvar.h>
#include <dev/ic/mc146818reg.h>
#include <dev/tc/tcvar.h>
#include <dev/tc/ioasicvar.h>                   /* XXX */

struct mcclock_ioasic_clockdatum {
        u_char  datum;
        char    pad[3];
};

struct mcclock_ioasic_softc {
        struct mcclock_softc    sc_mcclock;

        struct mcclock_ioasic_clockdatum *sc_dp;
};

int     mcclock_ioasic_match(struct device *, void *, void *);
void    mcclock_ioasic_attach(struct device *, struct device *, void *);

const struct cfattach mcclock_ioasic_ca = {
        sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match,
            mcclock_ioasic_attach,
};

void    mcclock_ioasic_write(struct mcclock_softc *, u_int, u_int);
u_int   mcclock_ioasic_read(struct mcclock_softc *, u_int);

const struct mcclock_busfns mcclock_ioasic_busfns = {
        mcclock_ioasic_write, mcclock_ioasic_read,
};

int
mcclock_ioasic_match(struct device *parent, void *match, void *aux)
{
        struct ioasicdev_attach_args *d = aux;

        if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
                return (0);

        return (1);
}

void
mcclock_ioasic_attach(struct device *parent, struct device *self, void *aux)
{
        struct ioasicdev_attach_args *ioasicdev = aux;
        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;

        sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;

        mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
}

void
mcclock_ioasic_write(struct mcclock_softc *dev, u_int reg, u_int datum)
{
        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;

        sc->sc_dp[reg].datum = datum;
}

u_int
mcclock_ioasic_read(struct mcclock_softc *dev, u_int reg)
{
        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;

        return (sc->sc_dp[reg].datum);
}