feature: add USB passthrough support to advancedconfig page (#255)

* feature: add POE passthrough support to advancedconfig page

* correct shellcheck warnings

files/usr/local/bin/usb_passthrough

@@ -0,0 +1,54 @@
+#!/bin/sh
+<<'LICENSE'
+  Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
+  Copyright (C) 2018 Darryl Quinn
+   See Contributors file for additional contributors
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation version 3 of the License.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+  Additional Terms:
+
+  Additional use restrictions exist on the AREDN(TM) trademark and logo.
+    See AREDNLicense.txt for more info.
+
+  Attributions to the AREDN Project must be retained in the source code.
+  If importing this code into a new or existing project attribution
+  to the AREDN project must be added to the source code.
+
+  You must not misrepresent the origin of the material contained within.
+
+  Modified versions must be modified to attribute to the original source
+  and be marked in reasonable ways as differentiate it from the original
+  version.
+
+LICENSE
+
+export newval=$1
+if [ -z "$newval" ]; then
+  echo "Syntax:   $0 1 - turns USB on"
+  echo "          $0 0 - turns USB off"
+  exit 2
+fi
+
+export pinnum=$(jsonfilter -e '@.gpioswitch.usb_power_switch.pin' < /etc/board.json)
+if [ -z "$pinnum" ]; then
+  echo "There are NO controllable USB ports defined for this device"
+  exit 1
+else
+	export pin=$(echo "gpio${pinnum}")
+	if [ ! -d /sys/class/gpio/$pin ]; then
+	        echo ${pinnum} > /sys/class/gpio/export
+	fi
+	echo ${newval} > /sys/class/gpio/${pin}/value
+  exit 0
+fi

files/www/cgi-bin/advancedconfig

@@ -73,9 +73,17 @@ push @setting, {
   type => "boolean", 
   desc => "Specifies whether a PoE passthrough port should be on or off.  (Not all devices have PoE passthrough ports.", 
   default => "0",
-  condition => "hasPOE()",
+  condition => "hasPOE()"
   postcallback => "setPOEOutput()"
 };
+push @setting, {
+  key => "aredn.\@usb[0].passthrough", 
+  type => "boolean", 
+  desc => "Specifies whether the USB port should be on or off.  (Not all devices have USB powered ports.", 
+  default => "1", 
+  postcallback => "setUSBOutput()"
+  condition => "hasUSB()",
+};
 # ----------------------------------------
 
 # ----- CONDITIONS ----------
@@ -85,6 +93,13 @@ sub hasPOE()
   chomp($pin);
   return $pin ? return 1 : return 0;
 }
+
+sub hasUSB()
+{
+  $pin=`cat /etc/board.json|jsonfilter -e '@.gpioswitch.usb_power_switch.pin'`;
+  chomp($pin);
+  return $pin ? return 1 : return 0;
+}
 # ----- CONDITIONS ----------
 
 
@@ -94,6 +109,12 @@ sub setPOEOutput()
   $newval="0" if(!$newval);
   system("/usr/local/bin/poe_passthrough",$newval);
 }
+
+sub setUSBOutput()
+{
+  $newval="0" if(!$newval);
+  system("/usr/local/bin/usb_passthrough",$newval);
+}
 # ----- CALLBACKS ----------
 
 if($parms{button_firstboot})