31930d4de5
FROMBCD()/TOBCD() macros into wrappers around it, resulting in both smaller code footprint and elimination of possible issues due to multiple evaluation of macro arguments. Suggested by Simon Burge and Anders Gavare on tech-kern.
112 lines
4.1 KiB
C
112 lines
4.1 KiB
C
/* $NetBSD: clock_subr.h,v 1.14 2006/03/11 15:40:07 kleink 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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* todr_getcal: get current TOD clock calibration value in ppm
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* todr_setcal: set calibration value in ppm in TOD clock
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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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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_getcal)(struct todr_chip_handle *, int *);
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int (*todr_setcal)(struct todr_chip_handle *, int);
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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_gettime(ct, t) ((*(ct)->todr_gettime)(ct, t))
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#define todr_settime(ct, t) ((*(ct)->todr_settime)(ct, t))
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#define todr_getcal(ct, vp) ((*(ct)->todr_gettime)(ct, vp))
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#define todr_setcal(ct, v) ((*(ct)->todr_settime)(ct, v))
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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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* 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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