2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
137 lines
4.2 KiB
C
137 lines
4.2 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2002 by Linus Nielsen Feltzing, Uwe Freese, Laurent Baum
|
|
*
|
|
* 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 "config.h"
|
|
#include "i2c.h"
|
|
#include "rtc.h"
|
|
#include "kernel.h"
|
|
#include "system.h"
|
|
#include "pcf50605.h"
|
|
#include <stdbool.h>
|
|
|
|
/* Values which each disable one alarm time register */
|
|
static const char alarm_disable[] = {
|
|
0x7f, 0x7f, 0x3f, 0x07, 0x3f, 0x1f, 0xff
|
|
};
|
|
|
|
void rtc_init(void)
|
|
{
|
|
rtc_check_alarm_started(false);
|
|
}
|
|
|
|
int rtc_read_datetime(unsigned char* buf)
|
|
{
|
|
return pcf50605_read_multiple(0x0a, buf, 7);
|
|
}
|
|
|
|
int rtc_write_datetime(unsigned char* buf)
|
|
{
|
|
pcf50605_write_multiple(0x0a, buf, 7);
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Checks the PCF interrupt 1 register bit 7 to see if an alarm interrupt has
|
|
* triggered since last we checked.
|
|
*/
|
|
bool rtc_check_alarm_flag(void)
|
|
{
|
|
return pcf50605_read(0x02) & 0x80;
|
|
}
|
|
|
|
/**
|
|
* Enables or disables the alarm.
|
|
* The Ipod bootloader clears all PCF interrupt registers and always enables
|
|
* the "wake on RTC" bit on OOCC1, so we have to rely on other means to find
|
|
* out if we just woke from an alarm.
|
|
* Return value is always false for us.
|
|
*/
|
|
bool rtc_enable_alarm(bool enable)
|
|
{
|
|
if (enable) {
|
|
/* Tell the PCF to ignore everything but second, minute and hour, so
|
|
* that an alarm will trigger the next time the alarm time occurs.
|
|
*/
|
|
pcf50605_write_multiple(0x14, alarm_disable + 3, 4);
|
|
/* Unmask the alarm interrupt (might be unneeded) */
|
|
pcf50605_write(0x5, pcf50605_read(0x5) & ~0x80);
|
|
/* Make sure wake on RTC is set when shutting down */
|
|
pcf50605_wakeup_flags |= 0x10;
|
|
} else {
|
|
/* We use this year to indicate a disabled alarm. If you happen to live
|
|
* around this time and are annoyed by this, feel free to seek out my
|
|
* grave and do something nasty to it.
|
|
*/
|
|
pcf50605_write(0x17, 0x99);
|
|
/* Make sure we don't wake on RTC after shutting down */
|
|
pcf50605_wakeup_flags &= ~0x10;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if alarm caused unit to start.
|
|
*/
|
|
bool rtc_check_alarm_started(bool release_alarm)
|
|
{
|
|
static bool run_before = false, alarm_state;
|
|
bool rc;
|
|
|
|
if (run_before) {
|
|
rc = alarm_state;
|
|
alarm_state &= ~release_alarm;
|
|
} else {
|
|
char rt[3], at[3];
|
|
/* The Ipod bootloader seems to read (and thus clear) the PCF interrupt
|
|
* registers, so we need to find some other way to detect if an alarm
|
|
* just happened
|
|
*/
|
|
pcf50605_read_multiple(0x0a, rt, 3);
|
|
pcf50605_read_multiple(0x11, at, 3);
|
|
|
|
/* If alarm time and real time match within 10 seconds of each other, we
|
|
* assume an alarm just triggered
|
|
*/
|
|
rc = alarm_state = rt[1] == at[1] && rt[2] == at[2]
|
|
&& (rt[0] - at[0]) <= 10;
|
|
run_before = true;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
void rtc_set_alarm(int h, int m)
|
|
{
|
|
/* Set us to wake at the first second of the specified time */
|
|
pcf50605_write(0x11, 0);
|
|
/* Convert to BCD */
|
|
pcf50605_write(0x12, ((m/10) << 4) | m%10);
|
|
pcf50605_write(0x13, ((h/10) << 4) | h%10);
|
|
}
|
|
|
|
void rtc_get_alarm(int *h, int *m)
|
|
{
|
|
char buf[2];
|
|
|
|
pcf50605_read_multiple(0x12, buf, 2);
|
|
/* Convert from BCD */
|
|
*m = ((buf[0] >> 4) & 0x7)*10 + (buf[0] & 0x0f);
|
|
*h = ((buf[1] >> 4) & 0x3)*10 + (buf[1] & 0x0f);
|
|
}
|
|
|