Support for the Dallas 1286 clock found on the Indigo2 and Indy.
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thorpej
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c4173c40c1
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/* $NetBSD: ds1286.c,v 1.1 2001/05/11 03:16:59 thorpej Exp $ */
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/*
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* Copyright (c) 2001 Rafal K. Boni
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* Copyright (c) 2001 Christopher Sekiya
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* Copyright (c) 1998, 1999, 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* Portions of this code are derived from software contributed to The
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* NetBSD Foundation by Jason R. Thorpe of the Numerical Aerospace
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* Simulation Facility, NASA Ames Research Center.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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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 <machine/bus.h>
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#include <machine/sysconf.h>
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#include <machine/machtype.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/ds1286reg.h>
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#include <sgimips/hpc/hpcvar.h>
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#include <sgimips/sgimips/clockvar.h>
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extern int mach_type;
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extern struct platform platform;
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void clockattach(struct device *, const struct clockfns *);
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struct dsclock_softc {
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struct device sc_dev;
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/* RTC registers */
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bus_space_tag_t sc_rtct;
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bus_space_handle_t sc_rtch;
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};
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static void dsclock_init(struct device *);
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static int dsclock_match(struct device *, struct cfdata *, void *);
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static void dsclock_attach(struct device *, struct device *, void *);
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static void dsclock_get(struct device *, struct clock_ymdhms *);
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static void dsclock_set(struct device *, struct clock_ymdhms *);
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const struct clockfns dsclock_clockfns = {
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dsclock_init, dsclock_get, dsclock_set,
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};
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struct cfattach dsclock_ca = {
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sizeof(struct dsclock_softc), dsclock_match, dsclock_attach
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};
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#define IRIX_CLOCK_BASE 1940
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#define ds1286_write(dev, reg, datum) \
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bus_space_write_1(dev->sc_rtct, dev->sc_rtch, reg, datum)
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#define ds1286_read(dev, reg) \
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(bus_space_read_1(dev->sc_rtct, dev->sc_rtch, reg))
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static int
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dsclock_match(struct device *parent, struct cfdata *match, void *aux)
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{
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if (mach_type == MACH_SGI_IP22)
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return 1;
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else
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return 0;
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}
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static void
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dsclock_attach(struct device *parent, struct device *self, void *aux)
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{
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struct dsclock_softc *sc = (void *)self;
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struct hpc_attach_args *haa = aux;
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int err;
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printf("\n");
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sc->sc_rtct = haa->ha_iot;
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if ((err = bus_space_subregion(haa->ha_iot, haa->ha_ioh,
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0x60000, 0x1ffff,
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&sc->sc_rtch)) != 0) {
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printf(": unable to map RTC registers, error = %d\n", err);
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return;
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}
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clockattach(&sc->sc_dev, &dsclock_clockfns);
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}
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static void
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dsclock_init(struct device *dev)
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{
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}
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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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static void
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dsclock_get(struct device *dev, struct clock_ymdhms * dt)
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{
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struct dsclock_softc *sc = (struct dsclock_softc *)dev;
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ds_todregs regs;
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int s;
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s = splhigh();
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DS1286_GETTOD(sc, ®s)
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splx(s);
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dt->dt_sec = FROMBCD(regs[DS_SEC]);
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dt->dt_min = FROMBCD(regs[DS_MIN]);
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if (regs[DS_HOUR] & DS_HOUR_12MODE) {
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dt->dt_hour = FROMBCD(regs[DS_HOUR] & DS_HOUR_12HR_MASK) +
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((regs[DS_HOUR] & DS_HOUR_12HR_PM) ? 12 : 0);
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/*
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* In AM/PM mode, hour range is 01-12, so adding in 12 hours
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* for PM gives us 01-24, whereas we want 00-23, so map hour
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* 24 to hour 0.
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*/
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if (dt->dt_hour == 24)
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dt->dt_hour = 0;
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} else {
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dt->dt_hour = FROMBCD(regs[DS_HOUR] & DS_HOUR_24HR_MASK);
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}
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dt->dt_wday = FROMBCD(regs[DS_DOW]);
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dt->dt_day = FROMBCD(regs[DS_DOM]);
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dt->dt_mon = FROMBCD(regs[DS_MONTH] & DS_MONTH_MASK);
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dt->dt_year = FROMBCD(regs[DS_YEAR]);
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/* RTC base on IRIX is 1940, offsets < 45 are from 1970 */
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if (dt->dt_year < 45)
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dt->dt_year += 30;
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dt->dt_year += IRIX_CLOCK_BASE; /* 1940 */
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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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static void
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dsclock_set(struct device *dev, struct clock_ymdhms * dt)
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{
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struct dsclock_softc *sc = (struct dsclock_softc *)dev;
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ds_todregs regs;
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int s;
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s = splhigh();
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DS1286_GETTOD(sc, ®s);
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splx(s);
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regs[DS_SUBSEC] = 0;
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regs[DS_SEC] = TOBCD(dt->dt_sec);
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regs[DS_MIN] = TOBCD(dt->dt_min);
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regs[DS_HOUR] = TOBCD(dt->dt_hour) & DS_HOUR_24HR_MASK;
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regs[DS_DOW] = TOBCD(dt->dt_wday);
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regs[DS_DOM] = TOBCD(dt->dt_day);
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/* Leave wave-generator bits as set originally */
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regs[DS_MONTH] &= ~DS_MONTH_MASK;
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regs[DS_MONTH] |= TOBCD(dt->dt_mon) & DS_MONTH_MASK;
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/*
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* If year < 1985, store (year - 1970), else (year - 1940). This
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* matches IRIX semantics.
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*/
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if (dt->dt_year < 1985)
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dt->dt_year -= 30;
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regs[DS_YEAR] = TOBCD(dt->dt_year - IRIX_CLOCK_BASE); /* - 1940 */
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s = splhigh();
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DS1286_PUTTOD(sc, ®s);
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splx(s);
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}
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