include/asm-mips/mach-mips/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  * RTC routines for Malta style attached PIIX4 device, which contains a
  20  * Motorola MC146818A-compatible Real Time Clock.
  21  */
  22 #ifndef __ASM_MACH_MALTA_MC146818RTC_H
  23 #define __ASM_MACH_MALTA_MC146818RTC_H
  24
  25 #include <asm/io.h>
  26 #include <asm/mips-boards/generic.h>
  27 #include <asm/mips-boards/malta.h>
  28
  29 #define RTC_PORT(x)     (0x70 + (x))
  30 #define RTC_IRQ         8
  31
  32 static inline unsigned char CMOS_READ(unsigned long addr)
  33 {
  34         outb(addr, MALTA_RTC_ADR_REG);
  35         return inb(MALTA_RTC_DAT_REG);
  36 }
  37
  38 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
  39 {
  40         outb(addr, MALTA_RTC_ADR_REG);
  41         outb(data, MALTA_RTC_DAT_REG);
  42 }
  43
  44 #define RTC_ALWAYS_BCD  0
  45
  46 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
  47
  48 #endif /* __ASM_MACH_MALTA_MC146818RTC_H */