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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* 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"
#include "timefuncs.h"
#include "debug.h"
#ifndef SIMULATOR
static struct tm tm;
#endif
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;
}
struct tm *get_time(void)
{
#ifndef SIMULATOR
#if CONFIG_RTC
static long timeout = 0;
/* Don't read the RTC more than once per second */
if (current_tick > timeout) {
char rtcbuf[7];
/* Once per second, 1/10th of a second off */
timeout = HZ * (current_tick / HZ + 1) + HZ / 5;
rtc_read_datetime(rtcbuf);
tm.tm_sec = ((rtcbuf[0] & 0x70) >> 4) * 10 + (rtcbuf[0] & 0x0f);
tm.tm_min = ((rtcbuf[1] & 0x70) >> 4) * 10 + (rtcbuf[1] & 0x0f);
tm.tm_hour = ((rtcbuf[2] & 0x30) >> 4) * 10 + (rtcbuf[2] & 0x0f);
tm.tm_wday = rtcbuf[3] & 0x07;
tm.tm_mday = ((rtcbuf[4] & 0x30) >> 4) * 10 + (rtcbuf[4] & 0x0f);
tm.tm_mon = ((rtcbuf[5] & 0x10) >> 4) * 10 + (rtcbuf[5] & 0x0f) - 1;
#ifdef IRIVER_H300_SERIES
/* Special kludge to coexist with the iriver firmware. The iriver firmware
stores the date as 1965+nn, and allows a range of 1980..2064. We use
1964+nn here to make leap years work correctly, so the date will be one
year off in the iriver firmware but at least won't be reset anymore. */
tm.tm_year = ((rtcbuf[6] & 0xf0) >> 4) * 10 + (rtcbuf[6] & 0x0f) + 64;
#else
tm.tm_year = ((rtcbuf[6] & 0xf0) >> 4) * 10 + (rtcbuf[6] & 0x0f) + 100;
#endif
tm.tm_yday = 0; /* Not implemented for now */
tm.tm_isdst = -1; /* Not implemented for now */
}
#else
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 = 1;
tm.tm_yday = 0; /* Not implemented for now */
tm.tm_isdst = -1; /* Not implemented for now */
#endif
return &tm;
#else
time_t now = time(NULL);
return localtime(&now);
#endif
}
int set_time(const struct tm *tm)
{
#if CONFIG_RTC
int rc;
char rtcbuf[7];
if (valid_time(tm))
{
rtcbuf[0]=((tm->tm_sec/10) << 4) | (tm->tm_sec%10);
rtcbuf[1]=((tm->tm_min/10) << 4) | (tm->tm_min%10);
rtcbuf[2]=((tm->tm_hour/10) << 4) | (tm->tm_hour%10);
rtcbuf[3]=tm->tm_wday;
rtcbuf[4]=((tm->tm_mday/10) << 4) | (tm->tm_mday%10);
rtcbuf[5]=(((tm->tm_mon+1)/10) << 4) | ((tm->tm_mon+1)%10);
#ifdef IRIVER_H300_SERIES
/* Iriver firmware compatibility kludge, see get_time(). */
rtcbuf[6]=(((tm->tm_year-64)/10) << 4) | ((tm->tm_year-64)%10);
#else
rtcbuf[6]=(((tm->tm_year-100)/10) << 4) | ((tm->tm_year-100)%10);
#endif
rc = rtc_write_datetime(rtcbuf);
if (rc < 0)
return -1;
else
return 0;
}
else
{
return -2;
}
#else
(void)tm;
return 0;
#endif
}
#if CONFIG_RTC
/* mktime() code taken from lynx-2.8.5 source, written
by Philippe De Muyter <phdm@macqel.be> */
time_t mktime(struct tm *t)
{
short month, year;
time_t result;
static int m_to_d[12] =
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334};
month = t->tm_mon;
year = t->tm_year + month / 12 + 1900;
month %= 12;
if (month < 0)
{
year -= 1;
month += 12;
}
result = (year - 1970) * 365 + (year - 1969) / 4 + m_to_d[month];
result = (year - 1970) * 365 + m_to_d[month];
if (month <= 1)
year -= 1;
result += (year - 1968) / 4;
result -= (year - 1900) / 100;
result += (year - 1600) / 400;
result += t->tm_mday;
result -= 1;
result *= 24;
result += t->tm_hour;
result *= 60;
result += t->tm_min;
result *= 60;
result += t->tm_sec;
return(result);
}
#endif
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