From 8c078f34ffc8b20282263a31d8a7e0c8294a848f Mon Sep 17 00:00:00 2001
From: Dave Chapman <dave@dchapman.com>
Date: Sat, 10 Oct 2009 15:26:38 +0000
Subject: Nano2G - reboot into disk mode when USB is inserted.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23070 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/export/config-ipodnano2g.h       |  5 +++++
 firmware/target/arm/s5l8700/usb-s5l8700.c | 31 ++++++++++++++++++++-----------
 2 files changed, 25 insertions(+), 11 deletions(-)

diff --git a/firmware/export/config-ipodnano2g.h b/firmware/export/config-ipodnano2g.h
index d9c5cbf3ea..f94584b3cf 100644
--- a/firmware/export/config-ipodnano2g.h
+++ b/firmware/export/config-ipodnano2g.h
@@ -3,6 +3,8 @@
  */
 #define TARGET_TREE /* this target is using the target tree system */
 
+#define IPOD_ARCH 1
+
 /* For Rolo and boot loader */
 #define MODEL_NUMBER 62
 
@@ -152,6 +154,9 @@
 /* USB On-the-go */
 //#define CONFIG_USBOTG USBOTG_M5636
 
+/* We reboot into the OF to handle USB */
+#define USB_HANDLED_BY_OF
+
 /* Define this if you have adjustable CPU frequency */
 #define HAVE_ADJUSTABLE_CPU_FREQ
 
diff --git a/firmware/target/arm/s5l8700/usb-s5l8700.c b/firmware/target/arm/s5l8700/usb-s5l8700.c
index 6ad4dcea95..c0bf7a951b 100644
--- a/firmware/target/arm/s5l8700/usb-s5l8700.c
+++ b/firmware/target/arm/s5l8700/usb-s5l8700.c
@@ -20,6 +20,9 @@
  ****************************************************************************/
 #include "config.h"
 #include "usb.h"
+#include "cpu.h"
+#include "system.h"
+#include "string.h"
 
 void usb_init_device(void)
 {
@@ -27,21 +30,27 @@ void usb_init_device(void)
 
 void usb_enable(bool on)
 {
-    (void)on;
-}
-
-void usb_attach(void)
-{
+    /* This device specific code will eventually give way to proper USB
+       handling, which should be the same for all S5L870x targets. */
+    if (on)
+    {
+#ifdef IPOD_ARCH
+        /* For iPod, we can only do one thing with USB mode atm - reboot
+           into the flash-based disk-mode.  This does not return. */
 
-}
+        memcpy((void *)0x0002bf00, "diskmodehotstuff\1\0\0\0", 20);
 
-static bool usb_pin_state(void)
-{
-    return false;
+        system_reboot(); /* Reboot */
+#endif
+    }
 }
 
-/* detect host or charger (INSERTED or EXTRACTED) */
 int usb_detect(void)
 {
-    return usb_pin_state() ? USB_INSERTED : USB_EXTRACTED;
+#if defined(IPOD_NANO2G)
+    if ((PDAT14 & 0x8) == 0x0)
+        return USB_INSERTED;
+#endif
+
+    return USB_EXTRACTED;
 }
-- 
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