2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2003 Izumi Tsutsui. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * $NetBSD: mc146818var.h,v 1.7 2008/05/14 13:29:29 tsutsui Exp $
31 struct mc146818_softc {
32 bus_space_tag_t sc_bst; /* bus space tag */
33 bus_space_handle_t sc_bsh; /* bus space handle */
35 struct mtx sc_mtx; /* hardware mutex */
37 u_char sc_rega; /* register A */
38 u_char sc_regb; /* register B */
40 u_int sc_year0; /* year counter offset */
42 u_int sc_flag; /* MD flags */
43 #define MC146818_NO_CENT_ADJUST 0x0001 /* don't adjust century */
44 #define MC146818_BCD 0x0002 /* use BCD mode */
45 #define MC146818_12HR 0x0004 /* use AM/PM mode */
47 /* MD chip register read/write functions */
48 u_int (*sc_mcread)(device_t dev, u_int reg);
49 void (*sc_mcwrite)(device_t dev, u_int reg, u_int val);
50 /* MD century get/set functions */
51 u_int (*sc_getcent)(device_t dev);
52 void (*sc_setcent)(device_t dev, u_int cent);
55 /* Default read/write functions */
56 u_int mc146818_def_read(device_t dev, u_int reg);
57 void mc146818_def_write(device_t dev, u_int reg, u_int val);
59 /* Chip attach function */
60 int mc146818_attach(device_t);
62 /* Methods for the clock interface */
64 int mc146818_getsecs(device_t dev, int *secp);
66 int mc146818_gettime(device_t dev, struct timespec *ts);
67 int mc146818_settime(device_t dev, struct timespec *ts);