mc146818var.h revision 201008 
1/*-
2 * Copyright (c) 2003 Izumi Tsutsui.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
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.
25 *
26 *	from: NetBSD: mc146818var.h,v 1.3 2003/11/24 06:20:40 tsutsui Exp
27 *
28 * $FreeBSD: head/sys/dev/mc146818/mc146818var.h 201008 2009-12-25 22:53:46Z marius $
29 */
30
31struct mc146818_softc {
32	bus_space_tag_t	sc_bst;			/* bus space tag */
33	bus_space_handle_t sc_bsh;		/* bus space handle */
34
35	struct mtx sc_mtx;			/* hardware mutex */
36
37	u_char sc_rega;				/* register A */
38	u_char sc_regb;				/* register B */
39
40	u_int sc_year0;				/* year counter offset */
41
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 */
46
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);
53};
54
55/* Default read/write functions */
56u_int mc146818_def_read(device_t dev, u_int reg);
57void mc146818_def_write(device_t dev, u_int reg, u_int val);
58
59/* Chip attach function */
60int mc146818_attach(device_t);
61
62/* Methods for the clock interface */
63#ifdef notyet
64int mc146818_getsecs(device_t dev, int *secp);
65#endif
66int mc146818_gettime(device_t dev, struct timespec *ts);
67int mc146818_settime(device_t dev, struct timespec *ts);
68