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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <asm/rtc.h>
19#include <asm/intersil.h>
20
21
22/* bits to set for start/run of the intersil */
23#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
24#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
25
26/* does this need to be implemented? */
27unsigned long sun3_gettimeoffset(void)
28{
29 return 1;
30}
31
32
33/* get/set hwclock */
34
35int sun3_hwclk(int set, struct rtc_time *t)
36{
37 volatile struct intersil_dt *todintersil;
38 unsigned long flags;
39
40 todintersil = (struct intersil_dt *) &intersil_clock->counter;
41
42 local_irq_save(flags);
43
44 intersil_clock->cmd_reg = STOP_VAL;
45
46 /* set or read the clock */
47 if(set) {
48 todintersil->csec = 0;
49 todintersil->hour = t->tm_hour;
50 todintersil->minute = t->tm_min;
51 todintersil->second = t->tm_sec;
52 todintersil->month = t->tm_mon;
53 todintersil->day = t->tm_mday;
54 todintersil->year = t->tm_year - 68;
55 todintersil->weekday = t->tm_wday;
56 } else {
57 /* read clock */
58 t->tm_sec = todintersil->csec;
59 t->tm_hour = todintersil->hour;
60 t->tm_min = todintersil->minute;
61 t->tm_sec = todintersil->second;
62 t->tm_mon = todintersil->month;
63 t->tm_mday = todintersil->day;
64 t->tm_year = todintersil->year + 68;
65 t->tm_wday = todintersil->weekday;
66 }
67
68 intersil_clock->cmd_reg = START_VAL;
69
70 local_irq_restore(flags);
71
72 return 0;
73
74}
75