diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-parisc/rtc.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-parisc/rtc.h')
-rw-r--r-- | include/asm-parisc/rtc.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/include/asm-parisc/rtc.h b/include/asm-parisc/rtc.h new file mode 100644 index 000000000000..f3d3d6b110ba --- /dev/null +++ b/include/asm-parisc/rtc.h | |||
@@ -0,0 +1,131 @@ | |||
1 | /* | ||
2 | * inclue/asm-parisc/rtc.h | ||
3 | * | ||
4 | * Copyright 2002 Randolph CHung <tausq@debian.org> | ||
5 | * | ||
6 | * Based on: include/asm-ppc/rtc.h and the genrtc driver in the | ||
7 | * 2.4 parisc linux tree | ||
8 | */ | ||
9 | |||
10 | #ifndef __ASM_RTC_H__ | ||
11 | #define __ASM_RTC_H__ | ||
12 | |||
13 | #ifdef __KERNEL__ | ||
14 | |||
15 | #include <linux/rtc.h> | ||
16 | |||
17 | #include <asm/pdc.h> | ||
18 | |||
19 | #define SECS_PER_HOUR (60 * 60) | ||
20 | #define SECS_PER_DAY (SECS_PER_HOUR * 24) | ||
21 | |||
22 | |||
23 | #define RTC_PIE 0x40 /* periodic interrupt enable */ | ||
24 | #define RTC_AIE 0x20 /* alarm interrupt enable */ | ||
25 | #define RTC_UIE 0x10 /* update-finished interrupt enable */ | ||
26 | |||
27 | #define RTC_BATT_BAD 0x100 /* battery bad */ | ||
28 | |||
29 | /* some dummy definitions */ | ||
30 | #define RTC_SQWE 0x08 /* enable square-wave output */ | ||
31 | #define RTC_DM_BINARY 0x04 /* all time/date values are BCD if clear */ | ||
32 | #define RTC_24H 0x02 /* 24 hour mode - else hours bit 7 means pm */ | ||
33 | #define RTC_DST_EN 0x01 /* auto switch DST - works f. USA only */ | ||
34 | |||
35 | # define __isleap(year) \ | ||
36 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | ||
37 | |||
38 | /* How many days come before each month (0-12). */ | ||
39 | static const unsigned short int __mon_yday[2][13] = | ||
40 | { | ||
41 | /* Normal years. */ | ||
42 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, | ||
43 | /* Leap years. */ | ||
44 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } | ||
45 | }; | ||
46 | |||
47 | static inline unsigned int get_rtc_time(struct rtc_time *wtime) | ||
48 | { | ||
49 | struct pdc_tod tod_data; | ||
50 | long int days, rem, y; | ||
51 | const unsigned short int *ip; | ||
52 | |||
53 | if(pdc_tod_read(&tod_data) < 0) | ||
54 | return RTC_24H | RTC_BATT_BAD; | ||
55 | |||
56 | |||
57 | // most of the remainder of this function is: | ||
58 | // Copyright (C) 1991, 1993, 1997, 1998 Free Software Foundation, Inc. | ||
59 | // This was originally a part of the GNU C Library. | ||
60 | // It is distributed under the GPL, and was swiped from offtime.c | ||
61 | |||
62 | |||
63 | days = tod_data.tod_sec / SECS_PER_DAY; | ||
64 | rem = tod_data.tod_sec % SECS_PER_DAY; | ||
65 | |||
66 | wtime->tm_hour = rem / SECS_PER_HOUR; | ||
67 | rem %= SECS_PER_HOUR; | ||
68 | wtime->tm_min = rem / 60; | ||
69 | wtime->tm_sec = rem % 60; | ||
70 | |||
71 | y = 1970; | ||
72 | |||
73 | #define DIV(a, b) ((a) / (b) - ((a) % (b) < 0)) | ||
74 | #define LEAPS_THRU_END_OF(y) (DIV (y, 4) - DIV (y, 100) + DIV (y, 400)) | ||
75 | |||
76 | while (days < 0 || days >= (__isleap (y) ? 366 : 365)) | ||
77 | { | ||
78 | /* Guess a corrected year, assuming 365 days per year. */ | ||
79 | long int yg = y + days / 365 - (days % 365 < 0); | ||
80 | |||
81 | /* Adjust DAYS and Y to match the guessed year. */ | ||
82 | days -= ((yg - y) * 365 | ||
83 | + LEAPS_THRU_END_OF (yg - 1) | ||
84 | - LEAPS_THRU_END_OF (y - 1)); | ||
85 | y = yg; | ||
86 | } | ||
87 | wtime->tm_year = y - 1900; | ||
88 | |||
89 | ip = __mon_yday[__isleap(y)]; | ||
90 | for (y = 11; days < (long int) ip[y]; --y) | ||
91 | continue; | ||
92 | days -= ip[y]; | ||
93 | wtime->tm_mon = y; | ||
94 | wtime->tm_mday = days + 1; | ||
95 | |||
96 | return RTC_24H; | ||
97 | } | ||
98 | |||
99 | static int set_rtc_time(struct rtc_time *wtime) | ||
100 | { | ||
101 | u_int32_t secs; | ||
102 | |||
103 | secs = mktime(wtime->tm_year + 1900, wtime->tm_mon + 1, wtime->tm_mday, | ||
104 | wtime->tm_hour, wtime->tm_min, wtime->tm_sec); | ||
105 | |||
106 | if(pdc_tod_set(secs, 0) < 0) | ||
107 | return -1; | ||
108 | else | ||
109 | return 0; | ||
110 | |||
111 | } | ||
112 | |||
113 | static inline unsigned int get_rtc_ss(void) | ||
114 | { | ||
115 | struct rtc_time h; | ||
116 | |||
117 | get_rtc_time(&h); | ||
118 | return h.tm_sec; | ||
119 | } | ||
120 | |||
121 | static inline int get_rtc_pll(struct rtc_pll_info *pll) | ||
122 | { | ||
123 | return -EINVAL; | ||
124 | } | ||
125 | static inline int set_rtc_pll(struct rtc_pll_info *pll) | ||
126 | { | ||
127 | return -EINVAL; | ||
128 | } | ||
129 | |||
130 | #endif /* __KERNEL__ */ | ||
131 | #endif /* __ASM_RTC_H__ */ | ||