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/*
* arch/m68k/sun3/intersil.c
*
* basic routines for accessing the intersil clock within the sun3 machines
*
* started 11/12/1999 Sam Creasey
*
* 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.
*/
#include <linux/kernel.h>
#include <asm/system.h>
#include <asm/rtc.h>
#include <asm/intersil.h>
/* bits to set for start/run of the intersil */
#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
/* does this need to be implemented? */
unsigned long sun3_gettimeoffset(void)
{
return 1;
}
void sun3_gettod (int *yearp, int *monp, int *dayp,
int *hourp, int *minp, int *secp)
{
unsigned char wday;
volatile struct intersil_dt* todintersil;
unsigned long flags;
todintersil = (struct intersil_dt *) &intersil_clock->counter;
save_and_cli(flags);
intersil_clock->cmd_reg = STOP_VAL;
*secp = todintersil->csec;
*hourp = todintersil->hour;
*minp = todintersil->minute;
*secp = todintersil->second;
*monp = todintersil->month;
*dayp = todintersil->day;
*yearp = todintersil->year+68; /* The base year for sun3 is 1968 */
wday = todintersil->weekday;
intersil_clock->cmd_reg = START_VAL;
restore_flags(flags);
}
/* get/set hwclock */
int sun3_hwclk(int set, struct hwclk_time *t)
{
volatile struct intersil_dt *todintersil;
unsigned long flags;
todintersil = (struct intersil_dt *) &intersil_clock->counter;
save_and_cli(flags);
intersil_clock->cmd_reg = STOP_VAL;
/* set or read the clock */
if(set) {
todintersil->csec = 0;
todintersil->hour = t->hour;
todintersil->minute = t->min;
todintersil->second = t->sec;
todintersil->month = t->mon;
todintersil->day = t->day;
todintersil->year = t->year - 68;
todintersil->weekday = t->wday;
} else {
/* read clock */
t->sec = todintersil->csec;
t->hour = todintersil->hour;
t->min = todintersil->minute;
t->sec = todintersil->second;
t->mon = todintersil->month;
t->day = todintersil->day;
t->year = todintersil->year + 68;
t->wday = todintersil->weekday;
}
intersil_clock->cmd_reg = START_VAL;
restore_flags(flags);
return 0;
}
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