arch/mips/include/asm/mach-dec/mc146818rtc.h

   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 */