Annotation of src/sys/dev/clock_subr.h, Revision 1.4
1.4 ! pk 1: /* $NetBSD: clock_subr.h,v 1.3 2000/07/25 22:38:14 pk Exp $ */
1.1 gwr 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:
1.3 pk 52: time_t clock_ymdhms_to_secs __P((struct clock_ymdhms *));
53: void clock_secs_to_ymdhms __P((time_t, struct clock_ymdhms *));
1.1 gwr 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. */
1.4 ! pk 62: #define SECDAY 86400
1.1 gwr 63: #define SECYR (SECDAY * 365)
64:
1.3 pk 65:
66: /*
67: * Interface to time-of-day clock devices.
68: *
69: * todr_gettime: convert time-of-day clock into a `struct timeval'
70: * todr_settime: set time-of-day clock from a `struct timeval'
71: * todr_getcal: get current TOD clock calibration value in ppm
72: * todr_setcal: set calibration value in ppm in TOD clock
73: *
74: * (this is probably not so useful:)
75: * todr_setwen: provide a machine-dependent TOD clock write-enable callback
76: * function which takes one boolean argument:
77: * 1 to enable writes; 0 to disable writes.
78: */
79: struct todr_chip_handle {
80: void *cookie; /* Device specific data */
81:
82: int (*todr_gettime)(struct todr_chip_handle *, struct timeval *);
83: int (*todr_settime)(struct todr_chip_handle *, struct timeval *);
84: int (*todr_getcal)(struct todr_chip_handle *, int *);
85: int (*todr_setcal)(struct todr_chip_handle *, int);
86: #if notyet
87: int (*todr_setwen)(struct todr_chip_handle *, int (*)(int));
88: #endif
89: };
90: typedef struct todr_chip_handle *todr_chip_handle_t;
91:
92: #define todr_gettime(ct, t) ((*(ct)->todr_gettime)(ct, t))
93: #define todr_settime(ct, t) ((*(ct)->todr_settime)(ct, t))
94: #define todr_getcal(ct, vp) ((*(ct)->todr_gettime)(ct, vp))
95: #define todr_setcal(ct, v) ((*(ct)->todr_settime)(ct, v))
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