| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Machine dependent access functions for RTC registers. |
| * |
| * Copyright (C) 1996, 1997, 1998, 2000 Ralf Baechle |
| */ |
| #ifndef _ASM_MC146818RTC_H |
| #define _ASM_MC146818RTC_H |
| |
| #include <linux/config.h> |
| #include <asm/io.h> |
| |
| #ifndef RTC_PORT |
| #if defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) |
| #define RTC_PORT(x) (0x14014800 + (x)) |
| #else |
| #define RTC_PORT(x) (0x70 + (x)) |
| #endif |
| #endif |
| |
| /* |
| * The yet supported machines all access the RTC index register via |
| * an ISA port access but the way to access the date register differs ... |
| */ |
| #define CMOS_READ(addr) ({ \ |
| rtc_ops->rtc_read_data(addr); \ |
| }) |
| #define CMOS_WRITE(val, addr) ({ \ |
| rtc_ops->rtc_write_data(val, addr); \ |
| }) |
| #define RTC_ALWAYS_BCD \ |
| rtc_ops->rtc_bcd_mode() |
| |
| /* |
| * This structure defines how to access various features of |
| * different machine types and how to access them. |
| */ |
| struct rtc_ops { |
| /* How to access the RTC register in a DS1287. */ |
| unsigned char (*rtc_read_data)(unsigned long addr); |
| void (*rtc_write_data)(unsigned char data, unsigned long addr); |
| int (*rtc_bcd_mode)(void); |
| }; |
| |
| extern struct rtc_ops *rtc_ops; |
| |
| #ifdef CONFIG_DECSTATION |
| #define RTC_IRQ 0 |
| #elif defined(CONFIG_MIPS_ITE8172) || defined(CONFIG_MIPS_IVR) |
| #include <asm/it8172/it8172_int.h> |
| #define RTC_IRQ IT8172_RTC_IRQ |
| #else |
| #define RTC_IRQ 8 |
| #endif |
| |
| #define RTC_DEC_YEAR 0x3f /* Where we store the real year on DECs. */ |
| |
| #endif /* _ASM_MC146818RTC_H */ |
