1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/*
* inclue/asm-parisc/rtc.h
*
* Copyright 2002 Randolph CHung <tausq@debian.org>
*
* Based on: include/asm-ppc/rtc.h and the genrtc driver in the
* 2.4 parisc linux tree
*/
#ifndef __ASM_RTC_H__
#define __ASM_RTC_H__
#ifdef __KERNEL__
#include <linux/rtc.h>
#include <asm/pdc.h>
#define SECS_PER_HOUR (60 * 60)
#define SECS_PER_DAY (SECS_PER_HOUR * 24)
#define RTC_PIE 0x40 /* periodic interrupt enable */
#define RTC_AIE 0x20 /* alarm interrupt enable */
#define RTC_UIE 0x10 /* update-finished interrupt enable */
#define RTC_BATT_BAD 0x100 /* battery bad */
/* some dummy definitions */
#define RTC_SQWE 0x08 /* enable square-wave output */
#define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */
#define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */
#define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */
# define __isleap(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
/* How many days come before each month (0-12). */
static const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
static inline unsigned int get_rtc_time(struct rtc_time *wtime)
{
struct pdc_tod tod_data;
long int days, rem, y;
const unsigned short int *ip;
if(pdc_tod_read(&tod_data) < 0)
return RTC_24H | RTC_BATT_BAD;
// most of the remainder of this function is:
// Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc.
// This was originally a part of the GNU C Library.
// It is distributed under the GPL, and was swiped from offtime.c
days = tod_data.tod_sec / SECS_PER_DAY;
rem = tod_data.tod_sec % SECS_PER_DAY;
wtime->tm_hour = rem / SECS_PER_HOUR;
rem %= SECS_PER_HOUR;
wtime->tm_min = rem / 60;
wtime->tm_sec = rem % 60;
y = 1970;
#define DIV(a, b) ((a) / (b) - ((a) % (b) < 0))
#define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400))
while (days < 0 || days >= (__isleap (y) ? 366 : 365))
{
/* Guess a corrected year, assuming 365 days per year. */
long int yg = y + days / 365 - (days % 365 < 0);
/* Adjust DAYS and Y to match the guessed year. */
days -= ((yg - y) * 365
+ LEAPS_THRU_END_OF (yg - 1)
- LEAPS_THRU_END_OF (y - 1));
y = yg;
}
wtime->tm_year = y - 1900;
ip = __mon_yday[__isleap(y)];
for (y = 11; days < (long int) ip[y]; --y)
continue;
days -= ip[y];
wtime->tm_mon = y;
wtime->tm_mday = days + 1;
return RTC_24H;
}
static int set_rtc_time(struct rtc_time *wtime)
{
u_int32_t secs;
secs = mktime(wtime->tm_year + 1900, wtime->tm_mon + 1, wtime->tm_mday,
wtime->tm_hour, wtime->tm_min, wtime->tm_sec);
if(pdc_tod_set(secs, 0) < 0)
return -1;
else
return 0;
}
static inline unsigned int get_rtc_ss(void)
{
struct rtc_time h;
get_rtc_time(&h);
return h.tm_sec;
}
static inline int get_rtc_pll(struct rtc_pll_info *pll)
{
return -EINVAL;
}
static inline int set_rtc_pll(struct rtc_pll_info *pll)
{
return -EINVAL;
}
#endif /* __KERNEL__ */
#endif /* __ASM_RTC_H__ */
|
