1/*
2 * arch/m68k/sun3/intersil.c
3 *
4 * basic routines for accessing the intersil clock within the sun3 machines
5 *
6 * started 11/12/1999 Sam Creasey
7 *
8 * This file is subject to the terms and conditions of the GNU General Public
9 * License.  See the file COPYING in the main directory of this archive
10 * for more details.
11 */
12
13#include <linux/kernel.h>
14#include <linux/rtc.h>
15
16#include <asm/errno.h>
17#include <asm/system.h>
18#include <asm/semaphore.h>
19#include <asm/rtc.h>
20#include <asm/intersil.h>
21
22
23/* bits to set for start/run of the intersil */
24#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
25#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
26
27/* does this need to be implemented? */
28unsigned long sun3_gettimeoffset(void)
29{
30  return 1;
31}
32
33
34/* get/set hwclock */
35
36int sun3_hwclk(int set, struct rtc_time *t)
37{
38	volatile struct intersil_dt *todintersil;
39	unsigned long flags;
40
41        todintersil = (struct intersil_dt *) &intersil_clock->counter;
42
43	local_irq_save(flags);
44
45	intersil_clock->cmd_reg = STOP_VAL;
46
47	/* set or read the clock */
48	if(set) {
49		todintersil->csec = 0;
50		todintersil->hour = t->tm_hour;
51		todintersil->minute = t->tm_min;
52		todintersil->second = t->tm_sec;
53		todintersil->month = t->tm_mon;
54		todintersil->day = t->tm_mday;
55		todintersil->year = t->tm_year - 68;
56		todintersil->weekday = t->tm_wday;
57	} else {
58		/* read clock */
59		t->tm_sec = todintersil->csec;
60		t->tm_hour = todintersil->hour;
61		t->tm_min = todintersil->minute;
62		t->tm_sec = todintersil->second;
63		t->tm_mon = todintersil->month;
64		t->tm_mday = todintersil->day;
65		t->tm_year = todintersil->year + 68;
66		t->tm_wday = todintersil->weekday;
67	}
68
69	intersil_clock->cmd_reg = START_VAL;
70
71	local_irq_restore(flags);
72
73	return 0;
74
75}
76