116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
/* $NetBSD: clock_subr.h,v 1.19 2006/09/16 00:50:52 gdamore Exp $ */
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/*-
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* Copyright (c) 1996 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 Gordon W. Ross
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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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#ifndef _DEV_CLOCK_SUBR_H_
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#define _DEV_CLOCK_SUBR_H_
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/*
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* "POSIX time" to/from "YY/MM/DD/hh/mm/ss"
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*/
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struct clock_ymdhms {
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u_short dt_year;
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u_char dt_mon;
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u_char dt_day;
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u_char dt_wday; /* Day of week */
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u_char dt_hour;
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u_char dt_min;
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u_char dt_sec;
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};
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time_t clock_ymdhms_to_secs(struct clock_ymdhms *);
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void clock_secs_to_ymdhms(time_t, struct clock_ymdhms *);
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/*
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* BCD to binary and binary to BCD.
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*/
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#define FROMBCD(x) bcdtobin((x))
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#define TOBCD(x) bintobcd((x))
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/* Some handy constants. */
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#define SECDAY (24 * 60 * 60)
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#define SECYR (SECDAY * 365)
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/* Traditional POSIX base year */
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#define POSIX_BASE_YEAR 1970
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/*
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* Interface to time-of-day clock devices.
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*
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* todr_gettime: convert time-of-day clock into a `struct timeval'
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* todr_settime: set time-of-day clock from a `struct timeval'
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*
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* (this is probably not so useful:)
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* todr_setwen: provide a machine-dependent TOD clock write-enable callback
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* function which takes one boolean argument:
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* 1 to enable writes; 0 to disable writes.
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*/
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struct todr_chip_handle {
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void *cookie; /* Device specific data */
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void *bus_cookie; /* Bus specific data */
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time_t base_time; /* Base time (e.g. rootfs time) */
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int (*todr_gettime)(struct todr_chip_handle *,
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volatile struct timeval *);
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int (*todr_settime)(struct todr_chip_handle *,
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volatile struct timeval *);
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int (*todr_gettime_ymdhms)(struct todr_chip_handle *,
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struct clock_ymdhms *);
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int (*todr_settime_ymdhms)(struct todr_chip_handle *,
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struct clock_ymdhms *);
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int (*todr_setwen)(struct todr_chip_handle *, int);
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};
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typedef struct todr_chip_handle *todr_chip_handle_t;
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#define todr_wenable(ct, v) if ((ct)->todr_setwen) \
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((*(ct)->todr_setwen)(ct, v))
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/*
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* Probably these should evolve into internal routines in kern_todr.c.
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*/
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extern int todr_gettime(todr_chip_handle_t tch, volatile struct timeval *);
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extern int todr_settime(todr_chip_handle_t tch, volatile struct timeval *);
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/*
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* Machine-dependent function that machine-independent RTC drivers can
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* use to register their todr_chip_handle_t with inittodr()/resettodr().
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*/
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void todr_attach(todr_chip_handle_t);
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#endif /* _DEV_CLOCK_SUBR_H_ */
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