From ec873607c1ee8fa5b32fe523e5e6e09da1f018aa Mon Sep 17 00:00:00 2001
From: Willy Tarreau <w@1wt.eu>
Date: Sun, 16 Nov 2014 10:11:47 +0100
Subject: glinet-button: add this new script to manipulate the button on
 gl-inet

It waits for the button to be pressed then released and blinks the leds
accordingly. It returns an exit code indicating if the button was pressed
during the initial period and released during the final one.

Example of use in .preinit :

ex /sbin/glinet-button
&{
  ex /sbin/restore-factory -f
}
---
 glinet-button | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100755 glinet-button

diff --git a/glinet-button b/glinet-button
new file mode 100755
index 0000000..9fba193
--- /dev/null
+++ b/glinet-button
@@ -0,0 +1,80 @@
+#!/bin/sh
+
+# sbin/glinet-button - read the reset button of the GL-Inet - v0.1 - 2014-11-16
+#
+# Copyright (C) 2014 Benoit Dolez & Willy Tarreau
+#       mailto: benoit@ant-computing.com,willy@ant-computing.com
+#
+# This program is licenced under GPLv2 ( http://www.gnu.org/licenses/gpl.txt )
+
+
+# This does the following things :
+#   1) blink the red light alone for one second indicating the period where
+#      the button is expected to be pressed ; after that it's too late.
+#   2) if the button was pressed, maintain the led in steady red position
+#      and wait for at most two seconds for the button to be released
+#   3) restore the leds to their original state
+#   4) report a success only if the button was pressed before the end of
+#      period 1 *AND* it was released before the end of period 2. That
+#      makes it suitable for use in factory reset without the risk of
+#      triggering it due to a stuck button or hardware malfunction.
+
+[ -e /sys/class/gpio/export ] || exit 1
+
+if [ ! -e /sys/class/gpio/gpio11/value ]; then
+	echo 11 > /sys/class/gpio/export
+fi
+
+[ -e /sys/class/gpio/gpio11/value ] || exit 1
+
+echo in > /sys/class/gpio/gpio11/direction
+
+# blink red led alone while waiting for the button. We force each of them on
+# before changing them so that sysfs detects the change.
+if [ -e /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger ]; then
+	green=$(cut -f2 -d'[' /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger | cut -f1 -d']')
+	[ "$green" != "none" ] || green=default-on  # address kernel bug
+	echo default-on > /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger
+	echo none > /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger
+fi
+
+if [ -e /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger ]; then
+	red=$(cut -f2 -d'[' /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger | cut -f1 -d']')
+	echo default-on > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger
+	echo timer > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger
+	echo 50 > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/delay_on
+	echo 50 > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/delay_off
+fi
+
+i=10
+while [ $((i--)) -gt 0 ]; do
+	read v < /sys/class/gpio/gpio11/value
+	[ "$v" = "1" ] && break
+	sleep 0.1
+done
+
+if [ -e /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger ]; then
+	echo default-on > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger
+fi
+
+# wait for button release, but apply a timeout in case a hardware bug or
+# misconfiguration makes the input stuck to 1. In this case this would
+# only have delayed the total boot process by 2 seconds.
+i=20
+while [ $((i--)) -gt 0 ]; do
+	read r < /sys/class/gpio/gpio11/value
+	[ "$r" = "1" ] || break
+	sleep 0.1
+done
+
+if [ -e /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger ]; then
+	echo $red > /sys/devices/platform/leds-gpio/leds/gl-connect\:red\:wlan/trigger
+fi
+if [ -e /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger ]; then
+	echo $green > /sys/devices/platform/leds-gpio/leds/gl-connect\:green\:lan/trigger
+fi
+
+# return exit code 0 if "v" matches a pressed button and "r" matches a
+# released button.
+test "$v" = "1" -a "$r" != "1"
+
-- 
1.7.12.1