NetBSD/sys/arch/mvme68k/dev/timekeeper.c

/*	$NetBSD: timekeeper.c,v 1.3 2002/02/23 17:18:54 scw Exp $	*/

/*-
 * Copyright (c) 2001 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Steve C. Woodford.
 *
 * 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.
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the NetBSD
 *	Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

/*
 * Attachment interface for the Time-Keeper RAMs on mvme boards.
 *
 * XXXSCW: Needs to be extended to allow read/write to NVRAM by
 * userland application.
 */

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

#include <machine/cpu.h>
#include <machine/bus.h>

#include <dev/mvme/clockvar.h>

#include <mvme68k/dev/mainbus.h>

struct timekeeper_softc {
	struct device		sc_dev;
	bus_space_tag_t		sc_bust;
	bus_space_handle_t	sc_bush;
	bus_size_t		sc_size;
};

int timekeeper_match(struct device *, struct cfdata *, void *);
void timekeeper_attach(struct device *, struct device *, void *);

struct cfattach timekeeper_ca = {
	sizeof(struct timekeeper_softc), timekeeper_match, timekeeper_attach
};

extern struct cfdriver timekeeper_cd;

int
timekeeper_match(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{
	struct mainbus_attach_args *ma = aux;

	if (strcmp(ma->ma_name, timekeeper_cd.cd_name))
		return (0);

	return (1);
}

void
timekeeper_attach(parent, self, aux)
	struct device *parent;
	struct device *self;
	void *aux;
{
	struct timekeeper_softc *sc = (struct timekeeper_softc *)self;
	struct mainbus_attach_args *ma = aux;
	todr_chip_handle_t todr;
	const char *model;

	sc->sc_bust = ma->ma_bust;

	if (machineid == MVME_147) {
		sc->sc_size = MK48T02_CLKSZ;
		model = "mk48t02";
	} else {
		sc->sc_size = MK48T08_CLKSZ;
		model = "mk48t08";
	}

	bus_space_map(ma->ma_bust, ma->ma_offset, sc->sc_size, 0, &sc->sc_bush);

	todr = mk48txx_attach(sc->sc_bust, sc->sc_bush, model, YEAR0,
	    NULL, NULL);
	if (todr == NULL)
		panic("\ntimekeeper_attach");

	printf(" Time-Keeper RAM\n");
	printf("%s: %ld bytes NVRAM plus Realtime Clock\n",
	    sc->sc_dev.dv_xname, sc->sc_size);

	clock_rtc_config(todr);
}