2652188cc4
interface controllers (of varying intelligence levels). Contributed by Wasabi Systems, Inc. Primarily written by Steve Woodford, with some modification by me.
108 lines
3.2 KiB
C
108 lines
3.2 KiB
C
/* $NetBSD: rtc.c,v 1.7 2003/09/30 00:35:30 thorpej Exp $ */
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/*
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* Copyright (c) 2000 Ben Harris
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* Copyright (c) 1994-1996 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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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 Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: rtc.c,v 1.7 2003/09/30 00:35:30 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <machine/machdep.h>
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#include <dev/clock_subr.h>
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todr_chip_handle_t todr_handle;
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void
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todr_attach(todr_chip_handle_t todr)
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{
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if (todr_handle)
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panic("todr_attach: rtc already configured");
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todr_handle = todr;
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}
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void
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inittodr(time_t base)
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{
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int check;
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struct timeval todrtime;
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check = 0;
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if (todr_handle == NULL) {
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printf("inittodr: rtc not present");
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time.tv_sec = base;
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time.tv_usec = 0;
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check = 1;
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} else {
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if (todr_gettime(todr_handle, &todrtime) != 0) {
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printf("inittodr: Error reading clock");
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time.tv_sec = base;
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time.tv_usec = 0;
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check = 1;
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} else {
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time = todrtime;
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if (time.tv_sec > base + 3 * SECDAY) {
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printf("inittodr: Clock has gained %ld days",
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(time.tv_sec - base) / SECDAY);
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check = 1;
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} else if (time.tv_sec + SECDAY < base) {
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printf("inittodr: Clock has lost %ld day(s)",
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(base - time.tv_sec) / SECDAY);
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check = 1;
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}
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}
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}
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if (check)
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printf(" - CHECK AND RESET THE DATE.\n");
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}
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void
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resettodr(void)
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{
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if (time.tv_sec == 0)
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return;
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if (todr_handle != NULL &&
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todr_settime(todr_handle, (struct timeval *)&time) != 0)
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printf("resettodr: failed to set time\n");
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}
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