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

   1 /*
   2  * Copyright (C) 1999, 2000, 2005  MIPS Technologies, Inc.
   3  *      All rights reserved.
   4  *      Authors: Carsten Langgaard <carstenl@mips.com>
   5  *               Maciej W. Rozycki <macro@mips.com>
   6  * Copyright (C) 2003, 05 Ralf Baechle (ralf@linux-mips.org)
   7  *
   8  * This program is free software; you can distribute it and/or modify it
   9  * under the terms of the GNU General Public License (Version 2) as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15  * for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  20  */
  21 #ifndef __ASM_MACH_ATLAS_MC146818RTC_H
  22 #define __ASM_MACH_ATLAS_MC146818RTC_H
  23
  24 #include <linux/types.h>
  25
  26 #include <asm/addrspace.h>
  27
  28 #include <asm/mips-boards/atlas.h>
  29 #include <asm/mips-boards/atlasint.h>
  30
  31 #define RTC_PORT(x)     (ATLAS_RTC_ADR_REG + (x) * 8)
  32 #define RTC_IO_EXTENT   0x100
  33 #define RTC_IOMAPPED    0
  34 #define RTC_IRQ         ATLASINT_RTC
  35
  36 static inline unsigned char CMOS_READ(unsigned long addr)
  37 {
  38         volatile u32 *ireg = (void *)CKSEG1ADDR(RTC_PORT(0));
  39         volatile u32 *dreg = (void *)CKSEG1ADDR(RTC_PORT(1));
  40
  41         *ireg = addr;
  42         return *dreg;
  43 }
  44
  45 static inline void CMOS_WRITE(unsigned char data, unsigned long addr)
  46 {
  47         volatile u32 *ireg = (void *)CKSEG1ADDR(RTC_PORT(0));
  48         volatile u32 *dreg = (void *)CKSEG1ADDR(RTC_PORT(1));
  49
  50         *ireg = addr;
  51         *dreg = data;
  52 }
  53
  54 #define RTC_ALWAYS_BCD  0
  55
  56 #define mc146818_decode_year(year) ((year) < 70 ? (year) + 2000 : (year) + 1970)
  57
  58 #endif /* __ASM_MACH_ATLAS_MC146818RTC_H */