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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h> /* get NULL */
#include "config.h"
#include "kernel.h"
#include "rtc.h"
#ifdef HAVE_RTC_IRQ
#include "rtc-target.h"
#endif
#include "timefuncs.h"
#include "debug.h"
static struct tm tm;
#if !CONFIG_RTC
static inline bool rtc_dirty(void)
{
return true;
}
static inline int rtc_read_datetime(struct tm *tm)
{
tm->tm_sec = 0;
tm->tm_min = 0;
tm->tm_hour = 0;
tm->tm_mday = 1;
tm->tm_mon = 0;
tm->tm_year = 70;
tm->tm_wday = 4;
tm->tm_yday = 0;
return 1;
}
#endif /* !CONFIG_RTC */
#if CONFIG_RTC
bool valid_time(const struct tm *tm)
{
if (tm->tm_hour < 0 || tm->tm_hour > 23 ||
tm->tm_sec < 0 || tm->tm_sec > 59 ||
tm->tm_min < 0 || tm->tm_min > 59 ||
tm->tm_year < 100 || tm->tm_year > 199 ||
tm->tm_mon < 0 || tm->tm_mon > 11 ||
tm->tm_wday < 0 || tm->tm_wday > 6 ||
tm->tm_mday < 1 || tm->tm_mday > 31)
return false;
else
return true;
}
/* Don't read the RTC more than once per second
* returns true if the rtc needs to be read
* targets may override with their own implementation
*/
#ifndef HAVE_RTC_IRQ
static inline bool rtc_dirty(void)
{
static long timeout = 0;
/* Don't read the RTC more than once per second */
if (TIME_AFTER(current_tick, timeout))
{
/* Once per second, 1/5th of a second off */
timeout = current_tick / HZ * HZ + 6*HZ / 5;
return true;
}
return false;
}
#endif /* HAVE_RTC_IRQ */
#endif /* CONFIG_RTC */
struct tm *get_time(void)
{
if (rtc_dirty())
{
rtc_read_datetime(&tm);
tm.tm_isdst = -1; /* Not implemented for now */
}
return &tm;
}
int set_time(const struct tm *tm)
{
#if CONFIG_RTC
int rc;
if (valid_time(tm))
{
rc = rtc_write_datetime(tm);
if (rc < 0)
return -1;
else
return 0;
}
else
{
return -2;
}
#else /* No RTC */
(void)tm;
return -1;
#endif /* RTC */
}
#if CONFIG_RTC
void set_day_of_week(struct tm *tm)
{
int y=tm->tm_year+1900;
int d=tm->tm_mday;
int m=tm->tm_mon;
static const char mo[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
if(m == 0 || m == 1) y--;
tm->tm_wday = (d + mo[m] + y + y/4 - y/100 + y/400) % 7;
}
#endif /* CONFIG_RTC */
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