Sansa c200: fix system_reboot with some magic from the OF. Reboot to the OF when usb is inserted.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@14862 a1c6a512-1295-4272-9138-f99709370657

firmware/target/arm/sandisk/ata-c200_e200.c

@@ -1087,6 +1087,10 @@ void ata_sleep(void)
 {
 }
 
+void ata_sleepnow(void)
+{
+}
+
 void ata_spin(void)
 {
 }

firmware/target/arm/system-pp502x.c

@@ -255,7 +255,16 @@ void system_init(void)
 void system_reboot(void)
 {
     /* Reboot */
+#ifdef SANSA_C200
+    CACHE_CTL &= ~0x10;
+
+    /* Magic used by the c200 OF. The BL uses a magic value of 0x23066b7b.
+       In both cases, the OF executes these 2 commands from iram. */
+    outl(0x23066000, 0x70000008);
+    DEV_RS = DEV_SYSTEM;
+#else
     DEV_RS |= DEV_SYSTEM;
+#endif
 }
 
 int system_memory_guard(int newmode)

firmware/target/arm/usb-fw-pp502x.c

@@ -100,7 +100,8 @@ void usb_enable(bool on)
        handling, which should be the same for all PP502x targets. */
     if (on)
     {
-#if defined(IPOD_ARCH) || defined(IRIVER_H10) || defined (IRIVER_H10_5GB)
+#if defined(IPOD_ARCH) || defined(IRIVER_H10) || defined (IRIVER_H10_5GB) ||\
+    defined(SANSA_C200)
         /* For the H10 and iPod, we can only do one thing with USB mode - reboot
            into the flash-based disk-mode.  This does not return. */