1 /*
2  * inclue/asm-ppc/rtc.h
3  *
4  * Author: Tom Rini <trini@mvista.com>
5  *
6  * 2002 (c) MontaVista, Software, Inc.  This file is licensed under
7  * the terms of the GNU General Public License version 2.  This program
8  * is licensed "as is" without any warranty of any kind, whether express
9  * or implied.
10  *
11  * Based on:
12  * include/asm-m68k/rtc.h
13  *
14  * Copyright Richard Zidlicky
15  * implementation details for genrtc/q40rtc driver
16  *
17  * And the old drivers/macintosh/rtc.c which was heavily based on:
18  * Linux/SPARC Real Time Clock Driver
19  * Copyright (C) 1996 Thomas K. Dyas (tdyas@eden.rutgers.edu)
20  *
21  * With additional work by Paul Mackerras and Franz Sirl.
22  */
23 
24 #ifndef __ASM_RTC_H__
25 #define __ASM_RTC_H__
26 
27 #ifdef __KERNEL__
28 
29 #include <linux/rtc.h>
30 
31 #include <asm/machdep.h>
32 #include <asm/time.h>
33 
34 #define RTC_PIE 0x40		/* periodic interrupt enable */
35 #define RTC_AIE 0x20		/* alarm interrupt enable */
36 #define RTC_UIE 0x10		/* update-finished interrupt enable */
37 
38 extern void gen_rtc_interrupt(unsigned long);
39 
40 /* some dummy definitions */
41 #define RTC_BATT_BAD 0x100	/* battery bad */
42 #define RTC_SQWE 0x08		/* enable square-wave output */
43 #define RTC_DM_BINARY 0x04	/* all time/date values are BCD if clear */
44 #define RTC_24H 0x02		/* 24 hour mode - else hours bit 7 means pm */
45 #define RTC_DST_EN 0x01	        /* auto switch DST - works f. USA only */
46 
get_rtc_time(struct rtc_time * time)47 static inline unsigned int get_rtc_time(struct rtc_time *time)
48 {
49 	if (ppc_md.get_rtc_time) {
50 		unsigned long nowtime;
51 
52 		nowtime = (ppc_md.get_rtc_time)();
53 
54 		to_tm(nowtime, time);
55 
56 		time->tm_year -= 1900;
57 		time->tm_mon -= 1; /* Make sure userland has a 0-based month */
58 	}
59 
60 	return RTC_24H;
61 }
62 
63 /* Set the current date and time in the real time clock. */
set_rtc_time(struct rtc_time * time)64 static inline int set_rtc_time(struct rtc_time *time)
65 {
66 	if (ppc_md.get_rtc_time) {
67 		unsigned long nowtime;
68 
69 		nowtime = mktime(time->tm_year+1900, time->tm_mon+1,
70 				time->tm_mday, time->tm_hour, time->tm_min,
71 				time->tm_sec);
72 
73 		(ppc_md.set_rtc_time)(nowtime);
74 
75 		return 0;
76 	} else
77 		return -EINVAL;
78 }
79 
get_rtc_ss(void)80 static inline unsigned int get_rtc_ss(void)
81 {
82 	struct rtc_time h;
83 
84 	get_rtc_time(&h);
85 	return h.tm_sec;
86 }
87 
get_rtc_pll(struct rtc_pll_info * pll)88 static inline int get_rtc_pll(struct rtc_pll_info *pll)
89 {
90 	return -EINVAL;
91 }
set_rtc_pll(struct rtc_pll_info * pll)92 static inline int set_rtc_pll(struct rtc_pll_info *pll)
93 {
94 	return -EINVAL;
95 }
96 
97 #endif /* __KERNEL__ */
98 #endif /* __ASM_RTC_H__ */
99