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/*
* linux/arch/m68k/sun3x/time.c
*
* Sun3x-specific time handling
*/
#include <linux/types.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/traps.h>
#include <asm/sun3x.h>
#include "time.h"
#define M_CONTROL 0xf8
#define M_SEC 0xf9
#define M_MIN 0xfa
#define M_HOUR 0xfb
#define M_DAY 0xfc
#define M_DATE 0xfd
#define M_MONTH 0xfe
#define M_YEAR 0xff
#define C_WRITE 0x80
#define C_READ 0x40
#define C_SIGN 0x20
#define C_CALIB 0x1f
#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
/* Read the Mostek */
void sun3x_gettod (int *yearp, int *monp, int *dayp,
int *hourp, int *minp, int *secp)
{
volatile unsigned char *eeprom = (unsigned char *)SUN3X_EEPROM;
/* Stop updates */
*(eeprom + M_CONTROL) |= C_READ;
/* Read values */
*yearp = BCD_TO_BIN(*(eeprom + M_YEAR));
*monp = BCD_TO_BIN(*(eeprom + M_MONTH));
*dayp = BCD_TO_BIN(*(eeprom + M_DATE));
*hourp = BCD_TO_BIN(*(eeprom + M_HOUR));
*minp = BCD_TO_BIN(*(eeprom + M_MIN));
*secp = BCD_TO_BIN(*(eeprom + M_SEC));
/* Restart updates */
*(eeprom + M_CONTROL) &= ~C_READ;
}
/* Not much we can do here */
unsigned long sun3x_gettimeoffset (void)
{
return 0L;
}
static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
{
void (*vector)(int, void *, struct pt_regs *) = dev_id;
/* Clear the pending interrupt - pulse the enable line low */
disable_irq(5);
enable_irq(5);
vector(irq, NULL, regs);
}
void __init sun3x_sched_init(void (*vector)(int, void *, struct pt_regs *))
{
sys_request_irq(5, sun3x_timer_tick, IRQ_FLG_STD, "timer tick", vector);
/* Pulse enable low to get the clock started */
disable_irq(5);
enable_irq(5);
}
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