138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/* $NetBSD: mcclock.c,v 1.2 2001/06/10 05:26:59 thorpej 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/cdefs.h> /* RCS ID & Copyright macro defns */
|
|
|
|
__KERNEL_RCSID(0, "$NetBSD: mcclock.c,v 1.2 2001/06/10 05:26:59 thorpej Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
|
|
#include <dev/ic/mc146818reg.h>
|
|
|
|
#include <algor/algor/clockvar.h>
|
|
#include <algor/dev/mcclockvar.h>
|
|
|
|
void mcclock_init(struct device *);
|
|
void mcclock_get(struct device *, time_t, struct clocktime *);
|
|
void mcclock_set(struct device *, struct clocktime *);
|
|
|
|
const struct clockfns mcclock_clockfns = {
|
|
mcclock_init, mcclock_get, mcclock_set,
|
|
};
|
|
|
|
#define mc146818_write(dev, reg, datum) \
|
|
(*(dev)->sc_busfns->mc_bf_write)(dev, reg, datum)
|
|
#define mc146818_read(dev, reg) \
|
|
(*(dev)->sc_busfns->mc_bf_read)(dev, reg)
|
|
|
|
void
|
|
mcclock_attach(struct mcclock_softc *sc, const struct mcclock_busfns *busfns)
|
|
{
|
|
|
|
printf(": mc146818 or compatible\n");
|
|
|
|
sc->sc_busfns = busfns;
|
|
|
|
/*
|
|
* Turn interrupts off, just in case. Need to leave the SQWE
|
|
* set, because that's the DRAM refresh signal on Rev. B boards.
|
|
*/
|
|
mc146818_write(sc, MC_REGB, MC_REGB_SQWE | MC_REGB_BINARY |
|
|
MC_REGB_24HR);
|
|
|
|
clockattach(&sc->sc_dev, &mcclock_clockfns);
|
|
}
|
|
|
|
void
|
|
mcclock_init(struct device *dev)
|
|
{
|
|
|
|
/* We don't use the mcclock for the hardclock interrupt. */
|
|
}
|
|
|
|
/*
|
|
* Note the Algorithmics PMON firmware uses a different year base.
|
|
*/
|
|
#define ALGOR_YEAR_OFFSET 80
|
|
|
|
/*
|
|
* Get the time of day, based on the clock's value and/or the base value.
|
|
*/
|
|
void
|
|
mcclock_get(struct device *dev, time_t base, struct clocktime *ct)
|
|
{
|
|
struct mcclock_softc *sc = (struct mcclock_softc *)dev;
|
|
mc_todregs regs;
|
|
int s;
|
|
|
|
s = splclock();
|
|
MC146818_GETTOD(sc, ®s)
|
|
splx(s);
|
|
|
|
ct->sec = regs[MC_SEC];
|
|
ct->min = regs[MC_MIN];
|
|
ct->hour = regs[MC_HOUR];
|
|
ct->dow = regs[MC_DOW];
|
|
ct->day = regs[MC_DOM];
|
|
ct->mon = regs[MC_MONTH];
|
|
ct->year = regs[MC_YEAR] - ALGOR_YEAR_OFFSET;
|
|
}
|
|
|
|
/*
|
|
* Reset the TODR based on the time value.
|
|
*/
|
|
void
|
|
mcclock_set(struct device *dev, struct clocktime *ct)
|
|
{
|
|
struct mcclock_softc *sc = (struct mcclock_softc *)dev;
|
|
mc_todregs regs;
|
|
int s;
|
|
|
|
s = splclock();
|
|
MC146818_GETTOD(sc, ®s);
|
|
splx(s);
|
|
|
|
regs[MC_SEC] = ct->sec;
|
|
regs[MC_MIN] = ct->min;
|
|
regs[MC_HOUR] = ct->hour;
|
|
regs[MC_DOW] = ct->dow;
|
|
regs[MC_DOM] = ct->day;
|
|
regs[MC_MONTH] = ct->mon;
|
|
regs[MC_YEAR] = ct->year + ALGOR_YEAR_OFFSET;
|
|
|
|
s = splclock();
|
|
MC146818_PUTTOD(sc, ®s);
|
|
splx(s);
|
|
}
|