1 /*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Machine dependent access functions for RTC registers.
7 *
8 * Copyright (C) 1996, 1997, 1998, 2000 Ralf Baechle
9 */
10 #ifndef _ASM_MC146818RTC_H
11 #define _ASM_MC146818RTC_H
12
13 #include <linux/config.h>
14 #include <asm/io.h>
15
16 #ifndef RTC_PORT
17 #define RTC_PORT(x) (0x70 + (x))
18 #endif
19
20 /*
21 * The yet supported machines all access the RTC index register via
22 * an ISA port access but the way to access the date register differs ...
23 */
24 #define CMOS_READ(addr) ({ \
25 rtc_ops->rtc_read_data(addr); \
26 })
27 #define CMOS_WRITE(val, addr) ({ \
28 rtc_ops->rtc_write_data(val, addr); \
29 })
30 #define RTC_ALWAYS_BCD \
31 rtc_ops->rtc_bcd_mode()
32
33 /*
34 * This structure defines how to access various features of
35 * different machine types and how to access them.
36 */
37 struct rtc_ops {
38 /* How to access the RTC register in a DS1287. */
39 unsigned char (*rtc_read_data)(unsigned long addr);
40 void (*rtc_write_data)(unsigned char data, unsigned long addr);
41 int (*rtc_bcd_mode)(void);
42 };
43
44 extern struct rtc_ops *rtc_ops;
45
46 #ifdef CONFIG_DECSTATION
47 #define RTC_IRQ 0
48 #else
49 #define RTC_IRQ 8
50 #endif
51
52 #endif /* _ASM_MC146818RTC_H */
53
This page was automatically generated by the
LXR engine.
Visit the LXR main site for more
information.