190 lines
5.6 KiB
C
190 lines
5.6 KiB
C
/* $NetBSD: dsclock.c,v 1.5 2011/07/01 18:53:46 dyoung 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/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: dsclock.c,v 1.5 2011/07/01 18:53:46 dyoung 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 <sys/bus.h>
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#include <machine/autoconf.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/sgimips/clockvar.h>
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struct dsclock_softc {
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device_t sc_dev;
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struct todr_chip_handle sc_todrch;
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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 int dsclock_match(device_t, cfdata_t, void *);
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static void dsclock_attach(device_t, device_t, void *);
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static int dsclock_gettime_ymdhms(struct todr_chip_handle *,
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struct clock_ymdhms *);
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static int dsclock_settime_ymdhms(struct todr_chip_handle *,
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struct clock_ymdhms *);
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CFATTACH_DECL_NEW(dsclock, sizeof(struct dsclock_softc),
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dsclock_match, dsclock_attach, NULL, NULL);
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#define ds1286_write(sc, reg, datum) \
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bus_space_write_1((sc)->sc_rtct, (sc)->sc_rtch, (reg), (datum))
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#define ds1286_read(sc, reg) \
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bus_space_read_1((sc)->sc_rtct, (sc)->sc_rtch, (reg))
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static int
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dsclock_match(device_t parent, cfdata_t cf, void *aux)
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{
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struct mainbus_attach_args *ma = aux;
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if (mach_type == MACH_SGI_IP22 && ma->ma_addr == 0x1fbe0000)
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return 1;
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return 0;
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}
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static void
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dsclock_attach(device_t parent, device_t self, void *aux)
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{
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struct dsclock_softc *sc = device_private(self);
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struct mainbus_attach_args *ma = aux;
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int err;
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aprint_normal("\n");
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sc->sc_rtct = SGIMIPS_BUS_SPACE_HPC;
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if ((err = bus_space_map(sc->sc_rtct, ma->ma_addr, 0x1ffff,
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BUS_SPACE_MAP_LINEAR, &sc->sc_rtch)) != 0) {
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aprint_error_dev(self,
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"unable to map RTC registers, error = %d\n", err);
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return;
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}
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sc->sc_todrch.cookie = sc;
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sc->sc_todrch.todr_gettime_ymdhms = dsclock_gettime_ymdhms;
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sc->sc_todrch.todr_settime_ymdhms = dsclock_settime_ymdhms;
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sc->sc_todrch.todr_setwen = NULL;
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todr_attach(&sc->sc_todrch);
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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 int
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dsclock_gettime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt)
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{
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struct dsclock_softc *sc = todrch->cookie;
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ds1286_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[DS1286_SEC]);
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dt->dt_min = FROMBCD(regs[DS1286_MIN]);
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if (regs[DS1286_HOUR] & DS1286_HOUR_12MODE) {
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dt->dt_hour =
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FROMBCD(regs[DS1286_HOUR] & DS1286_HOUR_12HR_MASK)
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+ ((regs[DS1286_HOUR] & DS1286_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 =
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FROMBCD(regs[DS1286_HOUR] & DS1286_HOUR_24HR_MASK);
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}
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dt->dt_wday = FROMBCD(regs[DS1286_DOW]);
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dt->dt_day = FROMBCD(regs[DS1286_DOM]);
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dt->dt_mon = FROMBCD(regs[DS1286_MONTH] & DS1286_MONTH_MASK);
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dt->dt_year = FROM_IRIX_YEAR(FROMBCD(regs[DS1286_YEAR]));
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return 0;
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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 int
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dsclock_settime_ymdhms(struct todr_chip_handle *todrch, struct clock_ymdhms *dt)
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{
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struct dsclock_softc *sc = todrch->cookie;
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ds1286_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[DS1286_SUBSEC] = 0;
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regs[DS1286_SEC] = TOBCD(dt->dt_sec);
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regs[DS1286_MIN] = TOBCD(dt->dt_min);
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regs[DS1286_HOUR] = TOBCD(dt->dt_hour) & DS1286_HOUR_24HR_MASK;
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regs[DS1286_DOW] = TOBCD(dt->dt_wday);
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regs[DS1286_DOM] = TOBCD(dt->dt_day);
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/* Leave wave-generator bits as set originally */
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regs[DS1286_MONTH] &= ~DS1286_MONTH_MASK;
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regs[DS1286_MONTH] |= TOBCD(dt->dt_mon) & DS1286_MONTH_MASK;
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regs[DS1286_YEAR] = TOBCD(TO_IRIX_YEAR(dt->dt_year));
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s = splhigh();
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DS1286_PUTTOD(sc, ®s);
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splx(s);
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return 0;
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}
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