NetBSD-5.0.2/sys/arch/mvme68k/dev/timekeeper.c

/*	$NetBSD: timekeeper.c,v 1.13 2008/04/28 20:23:29 martin 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.
 *
 * 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: timekeeper.c,v 1.13 2008/04/28 20:23:29 martin Exp $");

#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 <dev/ic/mk48txxreg.h>
#include <dev/ic/mk48txxvar.h>

#include <mvme68k/dev/mainbus.h>

#include "ioconf.h"

int timekeeper_match(device_t, cfdata_t, void *);
void timekeeper_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(timekeeper, sizeof(struct mk48txx_softc),
    timekeeper_match, timekeeper_attach, NULL, NULL);

int
timekeeper_match(device_t parent, cfdata_t 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(device_t parent, device_t self, void *aux)
{
	struct mk48txx_softc *sc = device_private(self);
	struct mainbus_attach_args *ma = aux;
	bus_size_t size;

	sc->sc_dev = self;
	sc->sc_bst = ma->ma_bust;

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

	bus_space_map(sc->sc_bst, ma->ma_offset, size, 0, &sc->sc_bsh);

	sc->sc_year0 = YEAR0;
	mk48txx_attach(sc);

	aprint_normal(" Time-Keeper RAM\n");
	aprint_normal_dev(self, "%ld bytes NVRAM plus Realtime Clock\n",
	    sc->sc_nvramsz);
}