LXR linux/arch/m68k/sun3x/time.c

   1/*
   2 *  linux/arch/m68k/sun3x/time.c
   3 *
   4 *  Sun3x-specific time handling
   5 */
   6
   7#include <linux/types.h>
   8#include <linux/kd.h>
   9#include <linux/init.h>
  10#include <linux/sched.h>
  11#include <linux/kernel_stat.h>
  12#include <linux/interrupt.h>
  13#include <linux/rtc.h>
  14#include <linux/bcd.h>
  15
  16#include <asm/irq.h>
  17#include <asm/io.h>
  18#include <asm/traps.h>
  19#include <asm/sun3x.h>
  20#include <asm/sun3ints.h>
  21#include <asm/rtc.h>
  22
  23#include "time.h"
  24
  25#define M_CONTROL 0xf8
  26#define M_SEC     0xf9
  27#define M_MIN     0xfa
  28#define M_HOUR    0xfb
  29#define M_DAY     0xfc
  30#define M_DATE    0xfd
  31#define M_MONTH   0xfe
  32#define M_YEAR    0xff
  33
  34#define C_WRITE   0x80
  35#define C_READ    0x40
  36#define C_SIGN    0x20
  37#define C_CALIB   0x1f
  38
  39int sun3x_hwclk(int set, struct rtc_time *t)
  40{
  41        volatile struct mostek_dt *h =
  42                (struct mostek_dt *)(SUN3X_EEPROM+M_CONTROL);
  43        unsigned long flags;
  44
  45        local_irq_save(flags);
  46
  47        if(set) {
  48                h->csr |= C_WRITE;
  49                h->sec = bin2bcd(t->tm_sec);
  50                h->min = bin2bcd(t->tm_min);
  51                h->hour = bin2bcd(t->tm_hour);
  52                h->wday = bin2bcd(t->tm_wday);
  53                h->mday = bin2bcd(t->tm_mday);
  54                h->month = bin2bcd(t->tm_mon);
  55                h->year = bin2bcd(t->tm_year);
  56                h->csr &= ~C_WRITE;
  57        } else {
  58                h->csr |= C_READ;
  59                t->tm_sec = bcd2bin(h->sec);
  60                t->tm_min = bcd2bin(h->min);
  61                t->tm_hour = bcd2bin(h->hour);
  62                t->tm_wday = bcd2bin(h->wday);
  63                t->tm_mday = bcd2bin(h->mday);
  64                t->tm_mon = bcd2bin(h->month);
  65                t->tm_year = bcd2bin(h->year);
  66                h->csr &= ~C_READ;
  67        }
  68
  69        local_irq_restore(flags);
  70
  71        return 0;
  72}
  73/* Not much we can do here */
  74u32 sun3x_gettimeoffset(void)
  75{
  76    return 0L;
  77}
  78
  79#if 0
  80static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
  81{
  82    void (*vector)(int, void *, struct pt_regs *) = dev_id;
  83
  84    /* Clear the pending interrupt - pulse the enable line low */
  85    disable_irq(5);
  86    enable_irq(5);
  87
  88    vector(irq, NULL, regs);
  89}
  90#endif
  91
  92void __init sun3x_sched_init(irq_handler_t vector)
  93{
  94
  95        sun3_disable_interrupts();
  96
  97
  98    /* Pulse enable low to get the clock started */
  99        sun3_disable_irq(5);
 100        sun3_enable_irq(5);
 101        sun3_enable_interrupts();
 102}
 103