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/Ethereal-msm8939-beta9/arch/m68k/sun3/intersil.c

https://bitbucket.org/MilosStamenkovic95/etherealos
C | 74 lines | 41 code | 17 blank | 16 comment | 2 complexity | d6ce6c2f33f7dca0d0b3c96dcd41dbcc MD5 | raw file
 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/rtc.h>
18#include <asm/intersil.h>
19
20
21/* bits to set for start/run of the intersil */
22#define STOP_VAL (INTERSIL_STOP | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
23#define START_VAL (INTERSIL_RUN | INTERSIL_INT_ENABLE | INTERSIL_24H_MODE)
24
25/* does this need to be implemented? */
26u32 sun3_gettimeoffset(void)
27{
28  return 1000;
29}
30
31
32/* get/set hwclock */
33
34int sun3_hwclk(int set, struct rtc_time *t)
35{
36	volatile struct intersil_dt *todintersil;
37	unsigned long flags;
38
39        todintersil = (struct intersil_dt *) &intersil_clock->counter;
40
41	local_irq_save(flags);
42
43	intersil_clock->cmd_reg = STOP_VAL;
44
45	/* set or read the clock */
46	if(set) {
47		todintersil->csec = 0;
48		todintersil->hour = t->tm_hour;
49		todintersil->minute = t->tm_min;
50		todintersil->second = t->tm_sec;
51		todintersil->month = t->tm_mon;
52		todintersil->day = t->tm_mday;
53		todintersil->year = t->tm_year - 68;
54		todintersil->weekday = t->tm_wday;
55	} else {
56		/* read clock */
57		t->tm_sec = todintersil->csec;
58		t->tm_hour = todintersil->hour;
59		t->tm_min = todintersil->minute;
60		t->tm_sec = todintersil->second;
61		t->tm_mon = todintersil->month;
62		t->tm_mday = todintersil->day;
63		t->tm_year = todintersil->year + 68;
64		t->tm_wday = todintersil->weekday;
65	}
66
67	intersil_clock->cmd_reg = START_VAL;
68
69	local_irq_restore(flags);
70
71	return 0;
72
73}
74