1 /* $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $ */ 2 3 /*- 4 * Copyright (c) 1996 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Gordon W. Ross 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * "POSIX time" to/from "YY/MM/DD/hh/mm/ss" 41 */ 42 struct clock_ymdhms { 43 u_short dt_year; 44 u_char dt_mon; 45 u_char dt_day; 46 u_char dt_wday; /* Day of week */ 47 u_char dt_hour; 48 u_char dt_min; 49 u_char dt_sec; 50 }; 51 52 time_t clock_ymdhms_to_secs __P((struct clock_ymdhms *)); 53 void clock_secs_to_ymdhms __P((time_t, struct clock_ymdhms *)); 54 55 /* 56 * BCD to decimal and decimal to BCD. 57 */ 58 #define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf)) 59 #define TOBCD(x) (((x) / 10 * 16) + ((x) % 10)) 60 61 /* Some handy constants. */ 62 #define SECDAY (24 * 60 * 60) 63 #define SECYR (SECDAY * 365) 64 65 /* Traditional POSIX base year */ 66 #define POSIX_BASE_YEAR 1970 67 68 /* 69 * Interface to time-of-day clock devices. 70 * 71 * todr_gettime: convert time-of-day clock into a `struct timeval' 72 * todr_settime: set time-of-day clock from a `struct timeval' 73 * todr_getcal: get current TOD clock calibration value in ppm 74 * todr_setcal: set calibration value in ppm in TOD clock 75 * 76 * (this is probably not so useful:) 77 * todr_setwen: provide a machine-dependent TOD clock write-enable callback 78 * function which takes one boolean argument: 79 * 1 to enable writes; 0 to disable writes. 80 */ 81 struct todr_chip_handle { 82 void *cookie; /* Device specific data */ 83 void *bus_cookie; /* Bus specific data */ 84 85 int (*todr_gettime)(struct todr_chip_handle *, struct timeval *); 86 int (*todr_settime)(struct todr_chip_handle *, struct timeval *); 87 int (*todr_getcal)(struct todr_chip_handle *, int *); 88 int (*todr_setcal)(struct todr_chip_handle *, int); 89 int (*todr_setwen)(struct todr_chip_handle *, int); 90 }; 91 typedef struct todr_chip_handle *todr_chip_handle_t; 92 93 #define todr_gettime(ct, t) ((*(ct)->todr_gettime)(ct, t)) 94 #define todr_settime(ct, t) ((*(ct)->todr_settime)(ct, t)) 95 #define todr_getcal(ct, vp) ((*(ct)->todr_gettime)(ct, vp)) 96 #define todr_setcal(ct, v) ((*(ct)->todr_settime)(ct, v)) 97 #define todr_wenable(ct, v) if ((ct)->todr_setwen) \ 98 ((*(ct)->todr_setwen)(ct, v)) 99