diff options
Diffstat (limited to 'firmware')
| -rw-r--r-- | firmware/drivers/rtc/rtc_pcf50606.c | 107 | ||||
| -rw-r--r-- | firmware/export/config/iaudiom5.h | 3 | ||||
| -rw-r--r-- | firmware/export/config/iaudiox5.h | 3 | ||||
| -rw-r--r-- | firmware/export/config/iriverh300.h | 3 |
4 files changed, 116 insertions, 0 deletions
diff --git a/firmware/drivers/rtc/rtc_pcf50606.c b/firmware/drivers/rtc/rtc_pcf50606.c index 2c751e5b01..540ebfff06 100644 --- a/firmware/drivers/rtc/rtc_pcf50606.c +++ b/firmware/drivers/rtc/rtc_pcf50606.c @@ -26,8 +26,14 @@ #include "pcf50606.h" #include "timefuncs.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(struct tm *tm) @@ -97,3 +103,104 @@ int rtc_write_datetime(const struct tm *tm) return rc; } +/** + * 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) +{ + int oldlevel = disable_irq_save(); + int rc = pcf50606_read(0x02) & 0x80; + restore_irq(oldlevel); + return rc; +} + +/** + * 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. + */ +void rtc_enable_alarm(bool enable) +{ + int oldlevel = disable_irq_save(); + 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. + */ + pcf50606_write_multiple(0x14, alarm_disable + 3, 4); + /* Unmask the alarm interrupt (might be unneeded) */ + pcf50606_write(0x5, pcf50606_read(0x5) & ~0x80); + /* Make sure wake on RTC is set when shutting down */ + pcf50606_write(0x8, pcf50606_read(0x8) | 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. + */ + pcf50606_write(0x17, 0x99); + /* Make sure we don't wake on RTC after shutting down */ + pcf50606_write(0x8, pcf50606_read(0x8) & ~0x10); + } + restore_irq(oldlevel); + return; +} + +/** + * 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 + */ + int oldlevel = disable_irq_save(); + pcf50606_read_multiple(0x0a, rt, 3); + pcf50606_read_multiple(0x11, at, 3); + restore_irq(oldlevel); + + /* 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; +} + + +/* set alarm time registers to the given time (repeat once per day) */ +void rtc_set_alarm(int h, int m) +{ + int oldlevel = disable_irq_save(); + /* Set us to wake at the first second of the specified time */ + pcf50606_write(0x11, 0); + /* Convert to BCD */ + pcf50606_write(0x12, ((m/10) << 4) | m%10); + pcf50606_write(0x13, ((h/10) << 4) | h%10); + restore_irq(oldlevel); +} + +/* read out the current alarm time */ +void rtc_get_alarm(int *h, int *m) +{ + char buf[2]; + + int oldlevel = disable_irq_save(); + pcf50606_read_multiple(0x12, buf, 2); + restore_irq(oldlevel); + /* Convert from BCD */ + *m = ((buf[0] >> 4) & 0x7)*10 + (buf[0] & 0x0f); + *h = ((buf[1] >> 4) & 0x3)*10 + (buf[1] & 0x0f); +} diff --git a/firmware/export/config/iaudiom5.h b/firmware/export/config/iaudiom5.h index f1ef78ae24..19c77ceb2d 100644 --- a/firmware/export/config/iaudiom5.h +++ b/firmware/export/config/iaudiom5.h @@ -98,6 +98,9 @@ /* define this if you have a real-time clock */ #define CONFIG_RTC RTC_PCF50606 +/* define this if you have a real-time clock alarm */ +#define HAVE_RTC_ALARM + /* Define this if you have an remote lcd */ #define HAVE_REMOTE_LCD diff --git a/firmware/export/config/iaudiox5.h b/firmware/export/config/iaudiox5.h index 62f6d595e3..d74c4472e9 100644 --- a/firmware/export/config/iaudiox5.h +++ b/firmware/export/config/iaudiox5.h @@ -100,6 +100,9 @@ /* define this if you have a real-time clock */ #define CONFIG_RTC RTC_PCF50606 +/* define this if you have a real-time clock alarm */ +#define HAVE_RTC_ALARM + /* Define this if you have an remote lcd */ #define HAVE_REMOTE_LCD diff --git a/firmware/export/config/iriverh300.h b/firmware/export/config/iriverh300.h index ce8f2151f0..0be9d0da7a 100644 --- a/firmware/export/config/iriverh300.h +++ b/firmware/export/config/iriverh300.h @@ -76,6 +76,9 @@ that needs spinups and can cause skips when shaked */ #define HAVE_DISK_STORAGE +/* Define if the device can wake from an RTC alarm */ +#define HAVE_RTC_ALARM + /* Define this if you have an remote lcd */ #define HAVE_REMOTE_LCD |