162 lines
5.5 KiB
C
162 lines
5.5 KiB
C
/* $NetBSD: intersil7170.c,v 1.8 2006/10/04 15:04:43 tsutsui Exp $ */
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Paul Kranenburg.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Intersil 7170 time-of-day chip subroutines.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: intersil7170.c,v 1.8 2006/10/04 15:04:43 tsutsui Exp $");
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/errno.h>
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#include <machine/bus.h>
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#include <dev/clock_subr.h>
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#include <dev/ic/intersil7170reg.h>
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#include <dev/ic/intersil7170var.h>
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int intersil7170_gettime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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int intersil7170_settime_ymdhms(todr_chip_handle_t, struct clock_ymdhms *);
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void
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intersil7170_attach(struct intersil7170_softc *sc)
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{
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todr_chip_handle_t handle;
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printf(": intersil7170");
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handle = &sc->sc_handle;
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handle->cookie = sc;
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handle->todr_gettime = NULL;
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handle->todr_settime = NULL;
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handle->todr_gettime_ymdhms = intersil7170_gettime_ymdhms;
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handle->todr_settime_ymdhms = intersil7170_settime_ymdhms;
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handle->todr_setwen = NULL;
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}
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/*
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* Set up the system's time, given a `reasonable' time value.
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*/
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int
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intersil7170_gettime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
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{
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struct intersil7170_softc *sc = handle->cookie;
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bus_space_tag_t bt = sc->sc_bst;
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bus_space_handle_t bh = sc->sc_bsh;
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uint8_t cmd;
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int year;
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int s;
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/* No interrupts while we're fiddling with the chip */
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s = splhigh();
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/* Enable read (stop time) */
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cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE);
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bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd);
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/* The order of reading out the clock elements is important */
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(void)bus_space_read_1(bt, bh, INTERSIL_ICSEC); /* not used */
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dt->dt_hour = bus_space_read_1(bt, bh, INTERSIL_IHOUR);
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dt->dt_min = bus_space_read_1(bt, bh, INTERSIL_IMIN);
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dt->dt_sec = bus_space_read_1(bt, bh, INTERSIL_ISEC);
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dt->dt_mon = bus_space_read_1(bt, bh, INTERSIL_IMON);
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dt->dt_day = bus_space_read_1(bt, bh, INTERSIL_IDAY);
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year = bus_space_read_1(bt, bh, INTERSIL_IYEAR);
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dt->dt_wday = bus_space_read_1(bt, bh, INTERSIL_IDOW);
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/* Done writing (time wears on) */
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cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE);
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bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd);
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splx(s);
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year += sc->sc_year0;
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if (year < POSIX_BASE_YEAR &&
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(sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0)
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year += 100;
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dt->dt_year = year;
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return 0;
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}
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/*
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* Reset the clock based on the current time.
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*/
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int
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intersil7170_settime_ymdhms(todr_chip_handle_t handle, struct clock_ymdhms *dt)
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{
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struct intersil7170_softc *sc = handle->cookie;
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bus_space_tag_t bt = sc->sc_bst;
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bus_space_handle_t bh = sc->sc_bsh;
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uint8_t cmd;
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int year;
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int s;
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year = dt->dt_year - sc->sc_year0;
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if (year > 99 && (sc->sc_flag & INTERSIL7170_NO_CENT_ADJUST) == 0)
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year -= 100;
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/* No interrupts while we're fiddling with the chip */
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s = splhigh();
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/* Enable write (stop time) */
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cmd = INTERSIL_COMMAND(INTERSIL_CMD_STOP, INTERSIL_CMD_IENABLE);
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bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd);
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/* The order of reading writing the clock elements is important */
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bus_space_write_1(bt, bh, INTERSIL_ICSEC, 0);
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bus_space_write_1(bt, bh, INTERSIL_IHOUR, dt->dt_hour);
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bus_space_write_1(bt, bh, INTERSIL_IMIN, dt->dt_min);
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bus_space_write_1(bt, bh, INTERSIL_ISEC, dt->dt_sec);
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bus_space_write_1(bt, bh, INTERSIL_IMON, dt->dt_mon);
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bus_space_write_1(bt, bh, INTERSIL_IDAY, dt->dt_day);
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bus_space_write_1(bt, bh, INTERSIL_IYEAR, year);
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bus_space_write_1(bt, bh, INTERSIL_IDOW, dt->dt_wday);
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/* Done writing (time wears on) */
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cmd = INTERSIL_COMMAND(INTERSIL_CMD_RUN, INTERSIL_CMD_IENABLE);
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bus_space_write_1(bt, bh, INTERSIL_ICMD, cmd);
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splx(s);
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return 0;
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}
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