210 lines
6.4 KiB
C
210 lines
6.4 KiB
C
/* $NetBSD: intersil7170.c,v 1.2 2001/11/13 13:14:38 lukem 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 1.2 2001/11/13 13:14:38 lukem 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/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/intersil7170.h>
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#define intersil_command(run, interrupt) \
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(run | interrupt | INTERSIL_CMD_FREQ_32K | INTERSIL_CMD_24HR_MODE | \
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INTERSIL_CMD_NORMAL_MODE)
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struct intersil7170_softc {
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bus_space_tag_t sil_bt;
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bus_space_handle_t sil_bh;
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int sil_year0;
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};
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int intersil7170_gettime(todr_chip_handle_t, struct timeval *);
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int intersil7170_settime(todr_chip_handle_t, struct timeval *);
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int intersil7170_getcal(todr_chip_handle_t, int *);
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int intersil7170_setcal(todr_chip_handle_t, int);
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int intersil7170_auto_century_adjust = 1;
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todr_chip_handle_t
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intersil7170_attach(bt, bh, year0)
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bus_space_tag_t bt;
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bus_space_handle_t bh;
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int year0;
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{
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todr_chip_handle_t handle;
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struct intersil7170_softc *sil;
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int sz;
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printf(": intersil7170");
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sz = ALIGN(sizeof(struct todr_chip_handle)) + sizeof(struct intersil7170);
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handle = malloc(sz, M_DEVBUF, M_NOWAIT);
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sil = (struct intersil7170_softc *)((u_long)handle +
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ALIGN(sizeof(struct todr_chip_handle)));
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handle->cookie = sil;
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handle->todr_gettime = intersil7170_gettime;
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handle->todr_settime = intersil7170_settime;
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handle->todr_getcal = intersil7170_getcal;
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handle->todr_setcal = intersil7170_setcal;
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sil->sil_bt = bt;
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sil->sil_bh = bh;
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sil->sil_year0 = year0;
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return (handle);
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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(handle, tv)
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todr_chip_handle_t handle;
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struct timeval *tv;
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{
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struct intersil7170_softc *sil = handle->cookie;
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bus_space_tag_t bt = sil->sil_bt;
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bus_space_handle_t bh = sil->sil_bh;
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struct clock_ymdhms dt;
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u_int8_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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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 += sil->sil_year0;
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if (year < 1970 && intersil7170_auto_century_adjust != 0)
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year += 100;
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dt.dt_year = year;
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tv->tv_sec = clock_ymdhms_to_secs(&dt);
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tv->tv_usec = 0;
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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(handle, tv)
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todr_chip_handle_t handle;
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struct timeval *tv;
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{
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struct intersil7170_softc *sil = handle->cookie;
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bus_space_tag_t bt = sil->sil_bt;
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bus_space_handle_t bh = sil->sil_bh;
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struct clock_ymdhms dt;
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u_int8_t cmd;
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int year;
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int s;
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clock_secs_to_ymdhms(tv->tv_sec, &dt);
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year = dt.dt_year - sil->sil_year0;
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if (year > 99 && intersil7170_auto_century_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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int
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intersil7170_getcal(handle, vp)
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todr_chip_handle_t handle;
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int *vp;
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{
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return (EOPNOTSUPP);
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}
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int
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intersil7170_setcal(handle, v)
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todr_chip_handle_t handle;
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int v;
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{
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return (EOPNOTSUPP);
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}
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