Viewing file:  mc146818rtc.h (1.41 KB) -rw-r--r--
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/*
* Machine dependent access functions for RTC registers.
*/
#ifndef _ASM_MC146818RTC_H
#define _ASM_MC146818RTC_H
#include <linux/config.h>
#include <asm/atarihw.h>
#ifdef CONFIG_ATARI
/* RTC in Atari machines */
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/io.h>
#define RTC_HAS_IRQ (ATARIHW_PRESENT(TT_MFP))
#define RTC_IRQ IRQ_TT_MFP_RTC
#define RTC_IRQ_FLAGS IRQ_TYPE_FAST
#define RTC_PORT(x) (TT_RTC_BAS + 2*(x))
#define RTC_ALWAYS_BCD 0 /* TOS uses binary mode, Linux should be able
* to deal with both modes */
#define RTC_CHECK_DRIVER_INIT() (MACH_IS_ATARI && ATARIHW_PRESENT(TT_CLK))
#define RTC_MACH_INIT() \
do { \
epoch = atari_rtc_year_offset + 1900; \
if (RTC_HAS_IRQ) \
/* select RTC int on H->L edge */ \
tt_mfp.active_edge &= ~0x40; \
} while(0)
#define RTC_MACH_EXIT()
/* On Atari, the year was stored with base 1970 in old TOS versions (before
* 3.06). Later, Atari recognized that this broke leap year recognition, and
* changed the base to 1968. Medusa and Hades always use the new version. */
#define RTC_CENTURY_SWITCH -1 /* no century switch */
#define RTC_MINYEAR epoch
#define CMOS_READ(addr) ({ \
atari_outb_p((addr),RTC_PORT(0)); \
atari_inb_p(RTC_PORT(1)); \
})
#define CMOS_WRITE(val, addr) ({ \
atari_outb_p((addr),RTC_PORT(0)); \
atari_outb_p((val),RTC_PORT(1)); \
})
#endif /* CONFIG_ATARI */
#endif /* _ASM_MC146818RTC_H */
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