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authorKarl Kurbjun <kkurbjun@gmail.com>2007-04-09 06:27:35 +0000
committerKarl Kurbjun <kkurbjun@gmail.com>2007-04-09 06:27:35 +0000
commit84789c6f6dceb47fdfd30f325b1c2cd50e535238 (patch)
tree180531fe06149816cac0412bdc71f665105dd7bb /firmware
parent5b7d21f0921023ceac4100fbf46dd23109e4a61a (diff)
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RTC alarm for Gigabeat. Will be useful one the OF bootloader is no longer required.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13077 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/drivers/rtc/rtc_s3c2440.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/firmware/drivers/rtc/rtc_s3c2440.c b/firmware/drivers/rtc/rtc_s3c2440.c
index c7a6f24490..ae422ffc2d 100644
--- a/firmware/drivers/rtc/rtc_s3c2440.c
+++ b/firmware/drivers/rtc/rtc_s3c2440.c
@@ -55,3 +55,69 @@ int rtc_write_datetime(unsigned char* buf)
return 1;
}
+#ifdef HAVE_RTC_ALARM
+/* This alarm code works in that it at least triggers INT_RTC. I am guessing
+ * that the OF bootloader for the Gigabeat detects the startup by alarm and shuts down.
+ * This code is available for use once the OF bootloader is no longer required.
+ */
+
+/* check whether the unit has been started by the RTC alarm function
+ * This code has not been written/checked for the gigabeat
+ */
+bool rtc_check_alarm_started(bool release_alarm)
+{
+ static bool alarm_state, run_before;
+ bool rc;
+
+ if (run_before) {
+ rc = alarm_state;
+ alarm_state &= ~release_alarm;
+ } else {
+ /* This call resets AF, so we store the state for later recall */
+ rc = alarm_state = rtc_check_alarm_flag();
+ run_before = true;
+ }
+
+ return rc;
+}
+
+/*
+ * I don't think this matters on the gigabeat, it seems designed to shut off the alarm in the
+ * event one happens while the player is running. This does not cause any problems on the
+ * gigabeat as the interupt is recieved (if not masked) and ignored.
+ */
+bool rtc_check_alarm_flag(void)
+{
+ return false;
+}
+
+/* set alarm time registers to the given time (repeat once per day) */
+void rtc_set_alarm(int h, int m)
+{
+ ALMMIN=(((m / 10) << 4) | (m % 10)) & 0x7f; /* minutes */
+ ALMHOUR=(((h / 10) << 4) | (h % 10)) & 0x3f; /* hour */
+}
+
+/* read out the current alarm time */
+void rtc_get_alarm(int *h, int *m)
+{
+ *m=((ALMMIN & 0x70) >> 4) * 10 + (ALMMIN & 0x0f);
+ *h=((ALMHOUR & 0x30) >> 4) * 10 + (ALMHOUR & 0x0f);
+}
+
+/* turn alarm on or off by setting the alarm flag enable
+ * returns false if alarm was set and alarm flag (output) is off
+ */
+bool rtc_enable_alarm(bool enable)
+{
+ /* Note: The interupt for the alarm is normally masked. May want to enable ( INTMSK&=~(1<<30); )
+ * it here if an alarm handler is desired (while the unit is not in sleep).
+ */
+ if (enable)
+ RTCALM=0x46;
+ else
+ RTCALM=0x00;
+
+ return false; /* all ok */
+}
+#endif