LXR linux/arch/mips/include/asm/mach-malta/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
  32static 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
  38static 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) + 1900)
  47
  48#endif /* __ASM_MACH_MALTA_MC146818RTC_H */
  49