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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 by Amaury Pouly
*
* 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 "system.h"
#include "rtc.h"
#include "timefuncs.h"
#include "rtc-imx233.h"
#if defined(SANSA_FUZEPLUS)
#define SECS_ADJUST 315532800 /* seconds between 1970-1-1 and 1980-1-1 */
#else
#define SECS_ADJUST 0
#endif
#define MINUTE_SECONDS 60
#define HOUR_SECONDS 3600
#define DAY_SECONDS 86400
#define WEEK_SECONDS 604800
#define YEAR_SECONDS 31536000
#define LEAP_YEAR_SECONDS 31622400
/* Days in each month */
static unsigned int days_in_month[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
static inline bool is_leapyear(int year)
{
if( ((year%4)==0) && (((year%100)!=0) || ((year%400)==0)) )
return true;
else
return false;
}
void rtc_init(void)
{
imx233_rtc_init();
}
int rtc_read_datetime(struct tm *tm)
{
uint32_t seconds = imx233_rtc_read_seconds() - SECS_ADJUST;
#ifdef SANSA_FUZEPLUS
/* The OF uses PERSISTENT2 register to keep the adjustment and only changes
* SECONDS if necessary. */
seconds += imx233_rtc_read_persistent(2);
#else
/* The Freescale recommended way of keeping time is the number of seconds
* since 00:00 1/1/1980 */
#endif
/* Convert seconds since 00:00 1/1/xxxx (xxxx=year) */
/* weekday */
tm->tm_wday = ((seconds % WEEK_SECONDS) / DAY_SECONDS + 2) % 7;
/* Year */
int year = 1980;
while(seconds >= LEAP_YEAR_SECONDS)
{
if(is_leapyear(year))
seconds -= LEAP_YEAR_SECONDS;
else
seconds -= YEAR_SECONDS;
year++;
}
if(is_leapyear(year))
days_in_month[1] = 29;
else
{
days_in_month[1] = 28;
if(seconds>YEAR_SECONDS)
{
year++;
seconds -= YEAR_SECONDS;
}
}
tm->tm_year = year % 100 + 100;
/* Month */
for(int i = 0; i < 12; i++)
{
if(seconds < days_in_month[i] * DAY_SECONDS)
{
tm->tm_mon = i;
break;
}
seconds -= days_in_month[i] * DAY_SECONDS;
}
/* Month Day */
int mday = seconds / DAY_SECONDS;
seconds -= mday * DAY_SECONDS;
tm->tm_mday = mday + 1; /* 1 ... 31 */
/* Hour */
int hour = seconds / HOUR_SECONDS;
seconds -= hour*HOUR_SECONDS;
tm->tm_hour = hour;
/* Minute */
int min = seconds / MINUTE_SECONDS;
seconds -= min*MINUTE_SECONDS;
tm->tm_min = min;
/* Second */
tm->tm_sec = seconds;
return 0;
}
int rtc_write_datetime(const struct tm *tm)
{
int i, year;
unsigned int year_days = 0;
unsigned int month_days = 0;
unsigned int seconds = 0;
year = 2000 + tm->tm_year - 100;
if(is_leapyear(year))
days_in_month[1] = 29;
else
days_in_month[1] = 28;
/* Number of days in months gone by this year*/
for(i = 0; i < tm->tm_mon; i++)
month_days += days_in_month[i];
/* Number of days in years gone by since 1-Jan-1980 */
year_days = 365*(tm->tm_year-100+20) + (tm->tm_year-100-1)/4 + 6;
/* Convert to seconds since 1-Jan-1980 */
seconds = tm->tm_sec
+ tm->tm_min*MINUTE_SECONDS
+ tm->tm_hour*HOUR_SECONDS
+ (tm->tm_mday-1)*DAY_SECONDS
+ month_days*DAY_SECONDS
+ year_days*DAY_SECONDS;
seconds += SECS_ADJUST;
#ifdef SANSA_FUZEPLUS
/* The OF uses PERSISTENT2 register to keep the adjustment and only changes
* SECONDS if necessary.
* NOTE: the OF uses this mechanism to prevent roll back in time. Although
* Rockbox will handle a negative PERSISTENT2 value, the OF will detect
* it and won't return in time before SECONDS */
imx233_rtc_write_persistent(2, seconds - imx233_rtc_read_seconds());
#else
/* The Freescale recommended way of keeping time is the number of seconds
* since 00:00 1/1/1980 */
imx233_rtc_write_seconds(seconds);
#endif
return 0;
}
void rtc_set_alarm(int h, int m)
{
(void) h;
(void) m;
}
void rtc_get_alarm(int *h, int *m)
{
(void) h;
(void) m;
}
void rtc_enable_alarm(bool enable)
{
(void) enable;
}
bool rtc_check_alarm_started(bool release_alarm)
{
(void) release_alarm;
return false;
}
bool rtc_check_alarm_flag(void)
{
return false;
}
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