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/intersil.h> |
18 | #include <asm/machdep.h> |
19 | |
20 | #include "sun3.h" |
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 | /* get/set hwclock */ |
27 | |
28 | int sun3_hwclk(int set, struct rtc_time *t) |
29 | { |
30 | volatile struct intersil_dt *todintersil; |
31 | unsigned long flags; |
32 | |
33 | todintersil = (struct intersil_dt *) &intersil_clock->counter; |
34 | |
35 | local_irq_save(flags); |
36 | |
37 | intersil_clock->cmd_reg = STOP_VAL; |
38 | |
39 | /* set or read the clock */ |
40 | if(set) { |
41 | todintersil->csec = 0; |
42 | todintersil->hour = t->tm_hour; |
43 | todintersil->minute = t->tm_min; |
44 | todintersil->second = t->tm_sec; |
45 | todintersil->month = t->tm_mon + 1; |
46 | todintersil->day = t->tm_mday; |
47 | todintersil->year = (t->tm_year - 68) % 100; |
48 | todintersil->weekday = t->tm_wday; |
49 | } else { |
50 | /* read clock */ |
51 | t->tm_sec = todintersil->csec; |
52 | t->tm_hour = todintersil->hour; |
53 | t->tm_min = todintersil->minute; |
54 | t->tm_sec = todintersil->second; |
55 | t->tm_mon = todintersil->month - 1; |
56 | t->tm_mday = todintersil->day; |
57 | t->tm_year = todintersil->year + 68; |
58 | t->tm_wday = todintersil->weekday; |
59 | if (t->tm_year < 70) |
60 | t->tm_year += 100; |
61 | } |
62 | |
63 | intersil_clock->cmd_reg = START_VAL; |
64 | |
65 | local_irq_restore(flags); |
66 | |
67 | return 0; |
68 | |
69 | } |
70 | |
71 |