Commit | Line | Data |
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1da177e4 LT |
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? */ | |
28 | unsigned long sun3_gettimeoffset(void) | |
29 | { | |
30 | return 1; | |
31 | } | |
32 | ||
33 | ||
34 | /* get/set hwclock */ | |
35 | ||
36 | int 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 |