Try to fix the case where Ipods would spuriously wake up even though no alarm had been set.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14885 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 11 insertions, 5 deletions

diff --git a/firmware/drivers/pcf50605.c b/firmware/drivers/pcf50605.c
index cf4ea9f..94d9d08 100644
--- a/firmware/drivers/pcf50605.c
+++ b/firmware/drivers/pcf50605.c
@@ -69,6 +69,7 @@
 #define D2REGC1 0x25
 #define D3REGC1 0x26
 
+unsigned char pcf50605_wakeup_flags = 0;
 
 int pcf50605_read(int address)
 {
@@ -101,8 +102,7 @@ int pcf50605_write_multiple(int address, const unsigned char* buf, int count)
    power on your iPod again. */
 void pcf50605_standby_mode(void)
 {
-    const char mask = pcf50605_read(OOCC1) | GOSTDBY | CHGWAK | EXTONWAK;
-    pcf50605_write(OOCC1, mask);
+    pcf50605_write(OOCC1, GOSTDBY | CHGWAK | EXTONWAK | pcf50605_wakeup_flags);
 }
 
 void pcf50605_init(void)
diff --git a/firmware/drivers/rtc/rtc_pcf50605.c b/firmware/drivers/rtc/rtc_pcf50605.c
index fedcdd3..93fa391 100644
--- a/firmware/drivers/rtc/rtc_pcf50605.c
+++ b/firmware/drivers/rtc/rtc_pcf50605.c
@@ -25,7 +25,9 @@
 #include <stdbool.h>
 
 /* Values which each disable one alarm time register */
-static char alarm_disable[] = { 0x7f, 0x7f, 0x3f, 0x07, 0x3f, 0x1f, 0xff };
+static const char alarm_disable[] = {
+    0x7f, 0x7f, 0x3f, 0x07, 0x3f, 0x1f, 0xff
+};
 
 void rtc_init(void)
 {
@@ -68,14 +70,16 @@ bool rtc_enable_alarm(bool enable)
         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 */
-        pcf50605_write(0x8, pcf50605_read(0x8) | 0x10);
+        /* 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;
 }
diff --git a/firmware/export/pcf50605.h b/firmware/export/pcf50605.h
index eb899af..b38d6a3 100644
--- a/firmware/export/pcf50605.h
+++ b/firmware/export/pcf50605.h
@@ -20,6 +20,8 @@
 #ifndef PCF50605_H
 #define PCF50605_H
 
+extern unsigned char pcf50605_wakeup_flags;
+
 int pcf50605_read(int address);
 int pcf50605_read_multiple(int address, unsigned char* buf, int count);
 int pcf50605_write(int address, unsigned char val);