xref: /illumos-gate/usr/src/uts/common/sys/rtc.h (revision 2d6eb4a5e0a47d30189497241345dc5466bb68ab)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
28 
29 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 #ifndef _SYS_RTC_H
33 #define	_SYS_RTC_H
34 
35 #ifdef	__cplusplus
36 extern "C" {
37 #endif
38 
39 
40 /*
41  * Definitions for Real Time Clock driver (Motorola MC146818 chip).
42  */
43 
44 /*
45  * MP NOTE:
46  * cmos_lck must be locked when addressing CMOS via
47  * RTC_ADDR and RTC_DATA i/o addresses
48  */
49 #define	RTC_ADDR	0x70	/* I/O port address of for register select */
50 #define	RTC_DATA	0x71	/* I/O port address for data read/write */
51 
52 /*
53  * Register A definitions
54  */
55 #define	RTC_A		0x0a	/* register A address */
56 #define	RTC_UIP		0x80	/* Update in progress bit */
57 #define	RTC_DIV0	0x00	/* Time base of 4.194304 MHz */
58 #define	RTC_DIV1	0x10	/* Time base of 1.048576 MHz */
59 #define	RTC_DIV2	0x20	/* Time base of 32.768 KHz */
60 #define	RTC_RATE6	0x06	/* interrupt rate of 976.562 */
61 
62 /*
63  * Register B definitions
64  */
65 #define	RTC_B		0x0b	/* register B address */
66 #define	RTC_SET		0x80	/* stop updates for time set */
67 #define	RTC_PIE		0x40	/* Periodic interrupt enable */
68 #define	RTC_AIE		0x20	/* Alarm interrupt enable */
69 #define	RTC_UIE		0x10	/* Update ended interrupt enable */
70 #define	RTC_SQWE	0x08	/* Square wave enable */
71 #define	RTC_DM		0x04	/* Date mode, 1 = binary, 0 = BCD */
72 #define	RTC_HM		0x02	/* hour mode, 1 = 24 hour, 0 = 12 hour */
73 #define	RTC_DSE		0x01	/* Daylight savings enable */
74 
75 /*
76  * Register C definitions
77  */
78 #define	RTC_C		0x0c	/* register C address */
79 #define	RTC_IRQF	0x80	/* IRQ flag */
80 #define	RTC_PF		0x40	/* PF flag bit */
81 #define	RTC_AF		0x20	/* AF flag bit */
82 #define	RTC_UF		0x10	/* UF flag bit */
83 
84 /*
85  * Register D definitions
86  */
87 #define	RTC_D		0x0d	/* register D address */
88 #define	RTC_VRT		0x80	/* Valid RAM and time bit */
89 
90 #define	RTC_NREG	0x0e	/* number of RTC registers */
91 #define	RTC_NREGP	0x0c	/* number of RTC registers to set time */
92 #define	RTC_CENTURY	0x32	/* not included in RTC_NREG(P) */
93 
94 /*
95  * Ioctl definitions for accessing RTC.
96  */
97 #define	RTCIOC	('R' << 8)
98 
99 #define	RTCRTIME	(RTCIOC | 0x01)		/* Read time from RTC */
100 #define	RTCSTIME	(RTCIOC | 0x02)		/* Set time into RTC */
101 
102 struct	rtc_t {			/* registers 0x0 to 0xD, 0x32 */
103 	unsigned char	rtc_sec;
104 	unsigned char	rtc_asec;
105 	unsigned char	rtc_min;
106 	unsigned char	rtc_amin;
107 	unsigned char	rtc_hr;
108 	unsigned char	rtc_ahr;
109 	unsigned char	rtc_dow;
110 	unsigned char	rtc_dom;
111 	unsigned char	rtc_mon;
112 	unsigned char	rtc_yr;
113 	unsigned char	rtc_statusa;
114 	unsigned char	rtc_statusb;
115 	unsigned char	rtc_statusc;
116 	unsigned char	rtc_statusd;
117 	unsigned char	rtc_century; /* register 0x32 */
118 	unsigned char	rtc_adom;	/* ACPI-provided day alarm */
119 	unsigned char	rtc_amon;	/* ACPI-provided mon alarm */
120 };
121 
122 #ifdef	__cplusplus
123 }
124 #endif
125 
126 #endif	/* _SYS_RTC_H */
127