31e40c8ce1
MIPS32 4Kc CPU board, with support for the MIPS64 5Kc and the QED RM5261 CPU boards to follow. The cs4281 audio hasn't been tested, there are some interrupt problems with onboard the pciide, but all other on-board peripherals work. The evbmips port will support more MIPS evaluation boards in the future.
136 lines
3.4 KiB
C
136 lines
3.4 KiB
C
/* $NetBSD: mcclock.c,v 1.1 2002/03/07 14:43:58 simonb Exp $ */
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/*
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* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: mcclock.c,v 1.1 2002/03/07 14:43:58 simonb Exp $");
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <dev/ic/mc146818reg.h>
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#include <evbmips/evbmips/clockvar.h>
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#include <evbmips/dev/mcclockvar.h>
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void mcclock_init(struct device *);
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void mcclock_get(struct device *, time_t, struct clocktime *);
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void mcclock_set(struct device *, struct clocktime *);
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const struct clockfns mcclock_clockfns = {
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mcclock_init, mcclock_get, mcclock_set,
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};
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#define mc146818_write(dev, reg, datum) \
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(*(dev)->sc_busfns->mc_bf_write)(dev, reg, datum)
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#define mc146818_read(dev, reg) \
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(*(dev)->sc_busfns->mc_bf_read)(dev, reg)
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void
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mcclock_attach(struct mcclock_softc *sc, const struct mcclock_busfns *busfns)
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{
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printf(": mc146818 or compatible");
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sc->sc_busfns = busfns;
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/*
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* Turn interrupts off, just in case. Need to leave the SQWE
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* set, because that's the DRAM refresh signal on Rev. B boards.
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*/
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mc146818_write(sc, MC_REGB, MC_REGB_SQWE | MC_REGB_BINARY |
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MC_REGB_24HR);
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clockattach(&sc->sc_dev, &mcclock_clockfns);
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}
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void
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mcclock_init(struct device *dev)
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{
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/* We don't use the mcclock for the hardclock interrupt. */
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}
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/*
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* Note the Algorithmics PMON firmware uses a different year base.
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*/
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#define ALGOR_YEAR_OFFSET 80
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/*
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* Get the time of day, based on the clock's value and/or the base value.
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*/
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void
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mcclock_get(struct device *dev, time_t base, struct clocktime *ct)
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{
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struct mcclock_softc *sc = (struct mcclock_softc *)dev;
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mc_todregs regs;
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int s;
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s = splclock();
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MC146818_GETTOD(sc, ®s)
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splx(s);
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ct->sec = regs[MC_SEC];
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ct->min = regs[MC_MIN];
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ct->hour = regs[MC_HOUR];
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ct->dow = regs[MC_DOW];
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ct->day = regs[MC_DOM];
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ct->mon = regs[MC_MONTH];
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ct->year = regs[MC_YEAR] - ALGOR_YEAR_OFFSET;
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}
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/*
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* Reset the TODR based on the time value.
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*/
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void
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mcclock_set(struct device *dev, struct clocktime *ct)
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{
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struct mcclock_softc *sc = (struct mcclock_softc *)dev;
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mc_todregs regs;
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int s;
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s = splclock();
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MC146818_GETTOD(sc, ®s);
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splx(s);
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regs[MC_SEC] = ct->sec;
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regs[MC_MIN] = ct->min;
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regs[MC_HOUR] = ct->hour;
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regs[MC_DOW] = ct->dow;
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regs[MC_DOM] = ct->day;
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regs[MC_MONTH] = ct->mon;
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regs[MC_YEAR] = ct->year + ALGOR_YEAR_OFFSET;
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s = splclock();
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MC146818_PUTTOD(sc, ®s);
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splx(s);
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}
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