add failsafe support for atheros-2.6 (#1501) - only works with ar5315+ at the moment

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7870 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/base-files/files/etc/preinit

@@ -3,7 +3,16 @@
 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
 . /etc/diag.sh
 
+failsafe_ip() {
+	ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
+}
+
 failsafe() {
+	[ -n "$ifname" ] && grep "$ifname" /proc/net/dev >/dev/null && {
+		failsafe_ip
+		netmsg 192.168.1.255 "Entering Failsafe!"
+		telnetd -l /bin/login <> /dev/null 2>&1
+	}
 	lock /tmp/.failsafe
 	ash --login
 }

target/linux/atheros-2.6/base-files/default/etc/preinit.arch

@@ -0,0 +1,8 @@
+# reset button only supported on ar5315+ at the moment
+grep 'Atheros AR231[567]' /proc/cpuinfo > /dev/null && {
+	ifname=eth0
+	failsafe_ip
+	netmsg 192.168.1.255 "Press reset now, to enter Failsafe!"
+	ifconfig "$ifname" 0.0.0.0 down
+	sleep 2
+}

target/linux/brcm-2.4/base-files/default/etc/preinit.arch

@@ -1,9 +1,5 @@
 . /etc/functions.sh
 
-failsafe_ip() {
-	ifconfig $ifname 192.168.1.1 netmask 255.255.255.0 broadcast 192.168.1.255 up
-}
-
 failsafe() {
 	lock /tmp/.failsafe
 	failsafe_ip