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