From d4bfc1523268213437c1506ebd3857521b530144 Mon Sep 17 00:00:00 2001
From: Torne Wuff <torne@wolfpuppy.org.uk>
Date: Sat, 9 Jan 2010 19:04:51 +0000
Subject: FS#10107: work around the issue on some ipods where after shutdown
 they do not power on.

Some ipods do not power on correctly after being shut down and require a hard
reset before they work again. This workaround shuts the device down via the OF
which prevents the problem from occurring. There is a cosmetic effect: the low
battery symbol appears briefly on power of.

Change applies to PP502x ipods: 4G/photo/video/mini1g/mini2g/nano1g

Patch by Boris Gjenero (dreamlayers), manual changes by me.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24207 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/arm/ipod/power-ipod.c | 21 ++++++++++++++++++++-
 manual/rockbox_interface/main.tex     |  6 ++++++
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/firmware/target/arm/ipod/power-ipod.c b/firmware/target/arm/ipod/power-ipod.c
index 0b516466fe..46701c8d3f 100644
--- a/firmware/target/arm/ipod/power-ipod.c
+++ b/firmware/target/arm/ipod/power-ipod.c
@@ -28,6 +28,10 @@
 #include "pcf50605.h"
 #include "usb.h"
 #include "lcd.h"
+#include "string.h"
+#if CONFIG_CPU == PP5022 || CONFIG_CPU == PP5020
+#include "rtc.h"
+#endif
 
 void power_init(void)
 {
@@ -152,9 +156,24 @@ void power_off(void)
 #endif
 
 #ifndef BOOTLOADER
-#ifdef IPOD_1G2G
+#if CONFIG_CPU == PP5022 || CONFIG_CPU == PP5020
+    /* When shut down by OF, wakeup via alarm is enabled.  This resets the
+       alarm time so an unintended wakeup does not occur. */
+    if (!(pcf50605_wakeup_flags & 0x10))
+        rtc_enable_alarm(false);
+#endif
+#if defined(IPOD_1G2G)
     /* we cannot turn off the 1st gen/ 2nd gen yet. Need to figure out sleep mode. */
     system_reboot();
+#elif CONFIG_CPU == PP5022
+    /* The OF in flash assumes boot failed because the battery is low.
+       If there is no charger connected, this leads to a shutdown.
+     */
+    memcpy((void *)(0x4001ff00+8), "booting!", 8);
+    system_reboot();
+#elif CONFIG_CPU == PP5020
+    memcpy((void *)(0x40017f00+8), "booting!", 8);
+    system_reboot();
 #else
     /* We don't turn off the ipod, we put it in a deep sleep */
     pcf50605_standby_mode();
diff --git a/manual/rockbox_interface/main.tex b/manual/rockbox_interface/main.tex
index 0bcee718d1..398766d5b9 100644
--- a/manual/rockbox_interface/main.tex
+++ b/manual/rockbox_interface/main.tex
@@ -495,6 +495,12 @@ To turn on and off your Rockbox enabled \dap{} use the following keys:
 
 \label{ref:Safeshutdown}On shutdown, Rockbox automatically saves its settings.
 
+\opt{ipod4g,ipodcolor,ipodvideo,ipodnano,ipodmini}{%
+  A low-battery symbol may appear briefly on the screen during shutdown.  This
+  is a side effect of the shutdown process and does not mean the battery is
+  actually low.
+}%
+
 \opt{IRIVER_H100_PAD,IRIVER_H300_PAD,IAUDIO_X5_PAD,SANSA_E200_PAD%
   ,SANSA_C200_PAD,IRIVER_H10_PAD,IPOD_4G_PAD,GIGABEAT_PAD}{%
   If you have problems with your settings, such as accidentally having
-- 
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