include/asm-mips/mach-atlas/mc146818rtc.h

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 1999,2000 MIPS Technologies, Inc.  All rights reserved.
   4  * Copyright (C) 2003 by Ralf Baechle
   5  *
   6  * This program is free software; you can distribute it and/or modify it
   7  * under the terms of the GNU General Public License (Version 2) as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  18  */
  19 #ifndef __ASM_MACH_ATLAS_MC146818RTC_H
  20 #define __ASM_MACH_ATLAS_MC146818RTC_H
  21
  22 #include <asm/io.h>
  23 #include <asm/mips-boards/atlas.h>
  24 #include <asm/mips-boards/atlasint.h>
  25
  26
  27 #define RTC_PORT(x)     (ATLAS_RTC_ADR_REG + (x)*8)
  28 #define RTC_IOMAPPED    1
  29 #define RTC_EXTENT      16
  30 #define RTC_IRQ         ATLASINT_RTC
  31
  32 #if CONFIG_CPU_LITTLE_ENDIAN
  33 #define ATLAS_RTC_PORT(x) (RTC_PORT(x) + 0)
  34 #else
  35 #define ATLAS_RTC_PORT(x) (RTC_PORT(x) + 3)
  36 #endif
  37
  38 static inline unsigned char CMOS_READ(unsigned long addr)
  39 {
  40         outb(addr, ATLAS_RTC_PORT(0));
  41
  42         return inb(ATLAS_RTC_PORT(1));
  43 }
  44
  45 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
  46 {
  47         outb(addr, ATLAS_RTC_PORT(0));
  48         outb(data, ATLAS_RTC_PORT(1));
  49 }
  50
  51 #define RTC_ALWAYS_BCD  0
  52
  53 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
  54
  55 #endif /* __ASM_MACH_ATLAS_MC146818RTC_H */