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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2007 by Barry Wardell
*
* 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 <stdbool.h>
#include "config.h"
#include "rtc.h"
#include "as3514.h"
#include "ascodec.h"
#include "time.h"
/* AMS Sansas start counting from Jan 1st 1970 instead of 1980 (not as3525v2) */
#if (CONFIG_CPU==AS3525)
#define SECS_ADJUST 0 /* 1970-1-1 00:00:00 */
#elif (CONFIG_CPU==AS3525v2)
#if defined(SANSA_CLIPZIP)
#define SECS_ADJUST 0 /* 1970-1-1 00:00:00 */
#else
#define SECS_ADJUST ((2*365*24*3600) + 26*(24*3600) - 7*3600 - 25*60)
#endif
#else
#define SECS_ADJUST 315532800 /* 1980-1-1 00:00:00 */
#endif
#ifdef HAVE_RTC_ALARM /* as3543 */
static struct {
unsigned int seconds; /* total seconds to wakeup */
int hour; /* wake-up hour */
int min; /* wake-up minute */
bool enabled; /* alarm enabled or not */
unsigned char flag; /* flag used by the OF */
} alarm;
void rtc_set_alarm(int h, int m)
{
alarm.hour = h;
alarm.min = m;
}
void rtc_get_alarm(int *h, int *m)
{
*h = alarm.hour;
*m = alarm.min;
}
/* Reads the AS3543 wakeup register */
static void alarm_read(void)
{
unsigned char buf[6];
unsigned int i;
int oldstatus;
/* read raw data */
oldstatus = disable_irq_save();
ascodec_read(0);
for (i = 0; i < sizeof(buf); i++) {
buf[i] = ascodec_read(AS3543_WAKEUP);
}
restore_irq(oldstatus);
/* decode */
alarm.seconds = buf[0] | (buf[1] << 8) | ((buf[2] & 0x7F) << 16);
alarm.enabled = buf[2] & (1 << 7);
alarm.flag = buf[3];
alarm.hour = buf[4];
alarm.min = buf[5];
}
/* Writes the AS3543 wakeup register */
static void alarm_write(void)
{
unsigned char buf[6];
unsigned int i;
int oldstatus;
/* encode */
buf[0] = alarm.seconds & 0xFF;
buf[1] = (alarm.seconds >> 8) & 0xFF;
buf[2] = ((alarm.seconds >> 16) & 0x7F) | (alarm.enabled ? (1 << 7) : 0);
buf[3] = alarm.flag;
buf[4] = alarm.hour;
buf[5] = alarm.min;
/* write raw data */
oldstatus = disable_irq_save();
ascodec_read(0);
for (i = 0; i < sizeof(buf); i++) {
ascodec_write(AS3543_WAKEUP, buf[i]);
}
restore_irq(oldstatus);
}
void rtc_alarm_poweroff(void)
{
if(!alarm.enabled)
return;
struct tm tm;
rtc_read_datetime(&tm);
int hours = alarm.hour - tm.tm_hour;
int mins = alarm.min - tm.tm_min;
if(mins < 0)
{
mins += 60;
hours -= 1;
}
if(hours < 0)
hours += 24;
uint32_t seconds = hours*3600 + mins*60;
if(seconds == 0)
seconds = 24*3600;
seconds -= tm.tm_sec;
#ifndef SAMSUNG_YPR0
/* disable MCLK, it is a wakeup source and prevents proper shutdown */
CGU_AUDIO = (2 << 0) | (1 << 11);
CGU_PLLBSUP = (1 << 2) | (1 << 3);
#endif
/* write wakeup register */
alarm.seconds = seconds;
alarm.enabled = true;
alarm_write();
/* enable heartbeat watchdog */
ascodec_write(AS3514_SYSTEM, (1<<3) | (1<<0));
/* In_Cntr : disable heartbeat source */
ascodec_write_pmu(0x1a, 4, ascodec_read_pmu(0x1a, 4) & ~(3<<2));
while(1);
}
void rtc_enable_alarm(bool enable)
{
alarm.enabled = enable;
}
bool rtc_check_alarm_started(bool release_alarm)
{
/* read wakeup register and check if alarm was enabled */
alarm_read();
if (!alarm.enabled) {
return false;
}
alarm.enabled = !release_alarm;
alarm_write();
struct tm tm;
rtc_read_datetime(&tm);
/* were we powered up at the programmed time ? */
return alarm.hour == tm.tm_hour && alarm.min == tm.tm_min;
}
bool rtc_check_alarm_flag(void)
{
/* We don't need to do anything special if it has already fired */
return false;
}
#endif /* HAVE_RTC_ALARM */
void rtc_init(void)
{
}
int rtc_read_datetime(struct tm *tm)
{
char tmp[4];
unsigned int seconds;
int i;
/* Get seconds time stamp from RTC */
for (i = 0; i < 4; i++){
tmp[i] = ascodec_read(AS3514_RTC_0 + i);
}
seconds = tmp[0] + (tmp[1]<<8) + (tmp[2]<<16) + (tmp[3]<<24);
/* convert to struct tm */
time_t time = seconds + SECS_ADJUST;
gmtime_r(&time, tm);
return 1;
}
int rtc_write_datetime(const struct tm *tm)
{
time_t time;
unsigned int seconds;
int i;
/* convert struct tm to time stamp */
time = mktime((struct tm *)tm);
seconds = time - SECS_ADJUST;
/* Send data to RTC */
for (i=0; i<4; i++){
ascodec_write(AS3514_RTC_0 + i, ((seconds >> (8 * i)) & 0xff));
}
return 1;
}
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