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, DEC2BCD(m));
pcf50605_write(0x13, DEC2BCD(h));
}
void accessory_supply_set(bool enable)
{
/* Set accessory power supply to 3.3V, otherwise switch it off. */
unsigned char value = enable ? 0xf8 : 0x18;
/* Write to register. */
pcf50605_write(PCF5060X_D2REGC1, value);
}
void pcf50605_init(void)
{
#if (defined (IPOD_VIDEO) || defined (IPOD_NANO))
/* I/O and GPO voltage supply. ECO not allowed regarding data sheet. Defaults:
* iPod Video = 0xf8 = 3.3V ON
* iPod nano = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_IOREGC, 0xf5); /* 3.0V ON */
/* Core voltage supply. ECO not stable, assumed due to less precision of
* voltage in ECO mode. DCDC2 is not relevant as this may be used for
* voltage scaling. Default is 1.2V ON for PP5022/PP5024 */
pcf50605_write(PCF5060X_DCDC1, 0xec); /* 1.2V ON */
pcf50605_write(PCF5060X_DCDC2, 0x0c); /* OFF */
/* Unknown. Defaults:
* iPod Video = 0xe3 = 1.8V ON
* iPod nano = 0xe3 = 1.8V ON */
pcf50605_write(PCF5060X_DCUDC1, 0xe3); /* 1.8V ON */
/* Codec voltage supply. ECO not allowed as max. current of 5mA is not
* sufficient. Defaults:
* iPod Video = 0xf5 = 3.0V ON
* iPod nano = 0xef = 2.4V ON */
pcf50605_write(PCF5060X_D1REGC1, 0xf0); /* 2.5V ON */
/* PCF5060X_D2REGC1 is set in accordance to the accessory power setting */
#if defined (IPOD_VIDEO)
/* LCD voltage supply. Defaults:
* iPod Video = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf1); /* 2.6V ON */
#elif defined (IPOD_NANO)
/* D3REGC has effect on LCD and ATA, leave it unchanged due to possible ATA
* failures. Defaults:
* iPod nano = 0xf5 = 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf5); /* 3.0V ON */
#endif
/* PCF5060X_LPREGC1 is leaved untouched as the setting varies over the
* different iPod platforms. Defaults:
* iPod Video = 0x1f = 0ff
* iPod nano = 0xf6 = 3.1V ON */
#else
/* keep initialization from svn for other iPods */
pcf50605_write(PCF5060X_D1REGC1, 0xf5); /* 3.0V ON */
pcf50605_write(PCF5060X_D3REGC1, 0xf5); /* 3.0V ON */
#endif
}
/**
* 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.
*/
void 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;
}
}
/* The following command puts the iPod into a deep sleep. Warning
from the good people of ipodlinux - never issue this command
without setting CHGWAK or EXTONWAK if you ever want to be able to
power on your iPod again. */
void pcf50605_standby_mode(void)
{
pcf50605_write(PCF5060X_OOCC1,
GOSTDBY | CHGWAK | EXTONWAK | pcf50605_wakeup_flags);
}
