1 /* $Id: ds1286.h,v 1.1 1998/07/10 01:14:55 ralf Exp $
2 *
3 * This file is subject to the terms and conditions of the GNU General Public
4 * License. See the file "COPYING" in the main directory of this archive
5 * for more details.
6 *
7 * mc146818rtc.h - register definitions for the Real-Time-Clock / CMOS RAM
8 * Copyright Torsten Duwe <duwe@informatik.uni-erlangen.de> 1993
9 * derived from Data Sheet, Copyright Motorola 1984 (!).
10 * It was written to be part of the Linux operating system.
11 *
12 * Copyright (C) 1998, 1999 Ralf Baechle
13 */
14 #ifndef _ASM_DS1286_h
15 #define _ASM_DS1286_h
16
17 #include <asm/mc146818rtc.h>
18
19 /**********************************************************************
20 * register summary
21 **********************************************************************/
22 #define RTC_HUNDREDTH_SECOND 0
23 #define RTC_SECONDS 1
24 #define RTC_MINUTES 2
25 #define RTC_MINUTES_ALARM 3
26 #define RTC_HOURS 4
27 #define RTC_HOURS_ALARM 5
28 #define RTC_DAY 6
29 #define RTC_DAY_ALARM 7
30 #define RTC_DATE 8
31 #define RTC_MONTH 9
32 #define RTC_YEAR 10
33 #define RTC_CMD 11
34 #define RTC_WHSEC 12
35 #define RTC_WSEC 13
36 #define RTC_UNUSED 14
37
38 /* RTC_*_alarm is always true if 2 MSBs are set */
39 # define RTC_ALARM_DONT_CARE 0xC0
40
41
42 /*
43 * Bits in the month register
44 */
45 #define RTC_EOSC 0x80
46 #define RTC_ESQW 0x40
47
48 /*
49 * Bits in the Command register
50 */
51 #define RTC_TDF 0x01
52 #define RTC_WAF 0x02
53 #define RTC_TDM 0x04
54 #define RTC_WAM 0x08
55 #define RTC_PU_LVL 0x10
56 #define RTC_IBH_LO 0x20
57 #define RTC_IPSW 0x40
58 #define RTC_TE 0x80
59
60 /*
61 * Conversion between binary and BCD.
62 */
63 #ifndef BCD_TO_BIN
64 #define BCD_TO_BIN(val) ((val)=((val)&15) + ((val)>>4)*10)
65 #endif
66
67 #ifndef BIN_TO_BCD
68 #define BIN_TO_BCD(val) ((val)=(((val)/10)<<4) + (val)%10)
69 #endif
70
71 #endif /* _ASM_DS1286_h */
72
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