1 /* $NetBSD: clock_subr.h,v 1.19 2006/09/16 00:50:52 gdamore 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 #ifndef _DEV_CLOCK_SUBR_H_ 40 #define _DEV_CLOCK_SUBR_H_ 41 42 /* 43 * "POSIX time" to/from "YY/MM/DD/hh/mm/ss" 44 */ 45 struct clock_ymdhms { 46 u_short dt_year; 47 u_char dt_mon; 48 u_char dt_day; 49 u_char dt_wday; /* Day of week */ 50 u_char dt_hour; 51 u_char dt_min; 52 u_char dt_sec; 53 }; 54 55 time_t clock_ymdhms_to_secs(struct clock_ymdhms *); 56 void clock_secs_to_ymdhms(time_t, struct clock_ymdhms *); 57 58 /* 59 * BCD to binary and binary to BCD. 60 */ 61 #define FROMBCD(x) bcdtobin((x)) 62 #define TOBCD(x) bintobcd((x)) 63 64 /* Some handy constants. */ 65 #define SECDAY (24 * 60 * 60) 66 #define SECYR (SECDAY * 365) 67 68 /* Traditional POSIX base year */ 69 #define POSIX_BASE_YEAR 1970 70 71 /* 72 * Interface to time-of-day clock devices. 73 * 74 * todr_gettime: convert time-of-day clock into a `struct timeval' 75 * todr_settime: set time-of-day clock from a `struct timeval' 76 * 77 * (this is probably not so useful:) 78 * todr_setwen: provide a machine-dependent TOD clock write-enable callback 79 * function which takes one boolean argument: 80 * 1 to enable writes; 0 to disable writes. 81 */ 82 struct todr_chip_handle { 83 void *cookie; /* Device specific data */ 84 void *bus_cookie; /* Bus specific data */ 85 time_t base_time; /* Base time (e.g. rootfs time) */ 86 87 int (*todr_gettime)(struct todr_chip_handle *, 88 volatile struct timeval *); 89 int (*todr_settime)(struct todr_chip_handle *, 90 volatile struct timeval *); 91 int (*todr_gettime_ymdhms)(struct todr_chip_handle *, 92 struct clock_ymdhms *); 93 int (*todr_settime_ymdhms)(struct todr_chip_handle *, 94 struct clock_ymdhms *); 95 int (*todr_setwen)(struct todr_chip_handle *, int); 96 97 }; 98 typedef struct todr_chip_handle *todr_chip_handle_t; 99 100 #define todr_wenable(ct, v) if ((ct)->todr_setwen) \ 101 ((*(ct)->todr_setwen)(ct, v)) 102 103 /* 104 * Probably these should evolve into internal routines in kern_todr.c. 105 */ 106 extern int todr_gettime(todr_chip_handle_t tch, volatile struct timeval *); 107 extern int todr_settime(todr_chip_handle_t tch, volatile struct timeval *); 108 109 /* 110 * Machine-dependent function that machine-independent RTC drivers can 111 * use to register their todr_chip_handle_t with inittodr()/resettodr(). 112 */ 113 void todr_attach(todr_chip_handle_t); 114 115 #endif /* _DEV_CLOCK_SUBR_H_ */ 116