include/asm-ppc/rtc.h

   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 /* some dummy definitions */
  39 #define RTC_BATT_BAD 0x100      /* battery bad */
  40 #define RTC_SQWE 0x08           /* enable square-wave output */
  41 #define RTC_DM_BINARY 0x04      /* all time/date values are BCD if clear */
  42 #define RTC_24H 0x02            /* 24 hour mode - else hours bit 7 means pm */
  43 #define RTC_DST_EN 0x01         /* auto switch DST - works f. USA only */
  44
  45 static inline unsigned int get_rtc_time(struct rtc_time *time)
  46 {
  47         if (ppc_md.get_rtc_time) {
  48                 unsigned long nowtime;
  49
  50                 nowtime = (ppc_md.get_rtc_time)();
  51
  52                 to_tm(nowtime, time);
  53
  54                 time->tm_year -= 1900;
  55                 time->tm_mon -= 1; /* Make sure userland has a 0-based month */
  56         }
  57         return RTC_24H;
  58 }
  59
  60 /* Set the current date and time in the real time clock. */
  61 static inline int set_rtc_time(struct rtc_time *time)
  62 {
  63         if (ppc_md.get_rtc_time) {
  64                 unsigned long nowtime;
  65
  66                 nowtime = mktime(time->tm_year+1900, time->tm_mon+1,
  67                                 time->tm_mday, time->tm_hour, time->tm_min,
  68                                 time->tm_sec);
  69
  70                 (ppc_md.set_rtc_time)(nowtime);
  71
  72                 return 0;
  73         } else
  74                 return -EINVAL;
  75 }
  76
  77 static inline unsigned int get_rtc_ss(void)
  78 {
  79         struct rtc_time h;
  80
  81         get_rtc_time(&h);
  82         return h.tm_sec;
  83 }
  84
  85 static inline int get_rtc_pll(struct rtc_pll_info *pll)
  86 {
  87         return -EINVAL;
  88 }
  89 static inline int set_rtc_pll(struct rtc_pll_info *pll)
  90 {
  91         return -EINVAL;
  92 }
  93
  94 #endif /* __KERNEL__ */
  95 #endif /* __ASM_RTC_H__ */