From d2595ec0757607f094c758ed0f72f71cbe174955 Mon Sep 17 00:00:00 2001
From: Maurus Cuelenaere <mcuelenaere@gmail.com>
Date: Wed, 20 May 2009 21:59:51 +0000
Subject: Onda VX747: improve the USB insertion detection

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21001 a1c6a512-1295-4272-9138-f99709370657
---
 firmware/target/mips/ingenic_jz47xx/usb-jz4740.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'firmware/target')

diff --git a/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c b/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
index e519efc4ab..5ba8dd6981 100644
--- a/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
+++ b/firmware/target/mips/ingenic_jz47xx/usb-jz4740.c
@@ -633,9 +633,15 @@ void usb_init_device(void)
 }
 
 #ifdef USB_GPIO_IRQ
+static unsigned long last_tick;
 void USB_GPIO_IRQ(void)
 {
-    usb_status_event(usb_detect());
+    /* Prevent enabled-disabled bouncing */
+    if(current_tick - last_tick > HZ/16)
+    {
+        usb_status_event(usb_detect());
+        last_tick = current_tick;
+    }
 }
 #endif
 
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