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mc146818rtc.h
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1 /*
2  * RTC definitions for DECstation style attached Dallas DS1287 chip.
3  *
4  * Copyright (C) 1998, 2001 by Ralf Baechle
5  * Copyright (C) 1998 by Harald Koerfgen
6  * Copyright (C) 2002, 2005 Maciej W. Rozycki
7  *
8  * This program is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU General Public License
10  * as published by the Free Software Foundation; either version
11  * 2 of the License, or (at your option) any later version.
12  */
13 #ifndef __ASM_MIPS_DEC_RTC_DEC_H
14 #define __ASM_MIPS_DEC_RTC_DEC_H
15 
16 #include <linux/types.h>
17 #include <asm/addrspace.h>
18 #include <asm/dec/system.h>
19 
20 extern volatile u8 *dec_rtc_base;
21 
22 #define ARCH_RTC_LOCATION
23 
24 #define RTC_PORT(x) CPHYSADDR((long)dec_rtc_base)
25 #define RTC_IO_EXTENT dec_kn_slot_size
26 #define RTC_IOMAPPED 0
27 #undef RTC_IRQ
28 
29 #define RTC_DEC_YEAR 0x3f /* Where we store the real year on DECs. */
30 
31 static inline unsigned char CMOS_READ(unsigned long addr)
32 {
33  return dec_rtc_base[addr * 4];
34 }
35 
36 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
37 {
38  dec_rtc_base[addr * 4] = data;
39 }
40 
41 #define RTC_ALWAYS_BCD 0
42 
43 #endif /* __ASM_MIPS_DEC_RTC_DEC_H */