HD200: Add timeout in usb_enable(false) to prevent infinite loop when something goes wrong.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27468 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 6 insertions, 1 deletions

diff --git a/firmware/target/coldfire/mpio/hd200/usb-hd200.c b/firmware/target/coldfire/mpio/hd200/usb-hd200.c
index 9a82359966..9717ef3205 100644
--- a/firmware/target/coldfire/mpio/hd200/usb-hd200.c
+++ b/firmware/target/coldfire/mpio/hd200/usb-hd200.c
@@ -48,6 +48,8 @@ int usb_detect(void)
 
 void usb_enable(bool on)
 {
+    /* one second timeout */
+    unsigned char timeout = 10;
    
     if(on)
     {
@@ -64,7 +66,10 @@ void usb_enable(bool on)
 
         and_l(~(1<<4),&GPIO1_OUT); /* GPIO36 low */
 
-        while ( !(GPIO1_READ & (1<<5)) ) {}
+        while ( !(GPIO1_READ & (1<<5)) && timeout--)
+        {
+            sleep(HZ/10);
+        }
         sleep(HZ);
     }
 }