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