From 3548aee12ab33a6fd2ae3d018f0f45d0c863527f Mon Sep 17 00:00:00 2001
From: Alexandre Bard <alexandre.bard@netmodule.com>
Date: Fri, 14 Jun 2019 10:48:15 +0200
Subject: [PATCH] ublox-gsm-config: Add factory reset feature

BugzID: 57487
---
 .../files/ublox-gsm-config.py                 | 41 ++++++++++++++-----
 1 file changed, 30 insertions(+), 11 deletions(-)

diff --git a/recipes-connectivity/ublox-gsm-config/files/ublox-gsm-config.py b/recipes-connectivity/ublox-gsm-config/files/ublox-gsm-config.py
index 956d41e..899cb54 100755
--- a/recipes-connectivity/ublox-gsm-config/files/ublox-gsm-config.py
+++ b/recipes-connectivity/ublox-gsm-config/files/ublox-gsm-config.py
@@ -114,6 +114,25 @@ def apn_setup(ser):
     print("Full functionality mode")
     execute_and_check(ser, b'AT+CFUN=1\r')
 
+def reset_modem(ser):
+    print("Resetting modem")
+    ser.write(b'AT+CFUN=16\r')
+    ser.close()
+    while os.path.exists(SERIAL_DEV):
+        time.sleep(1)
+    while not os.path.exists(SERIAL_DEV):
+        time.sleep(1)
+    return serial.Serial(SERIAL_DEV, 115200, timeout=0.5)
+
+def factory_reset():
+    print('factory reset the modem')
+    if not os.path.exists(SERIAL_DEV):
+        print('serial interface is not available, abort')
+        return -1
+    ser = serial.Serial(SERIAL_DEV, 115200, timeout=0.5)
+    execute_and_check(ser, b'AT+UFACTORY=2,1')
+    reset_modem(ser)
+
 def poweroff(gpio):
     print('poweroff')
     if not os.path.exists(SERIAL_DEV):
@@ -128,12 +147,20 @@ def poweroff(gpio):
 
     gpio.set_value(0)
 
+def help():
+    print('Usage : {} [stop|factory-reset]'.format(sys.argv[0]))
+
 def main():
     line = gpiod.find_line('GSM_SUP_EN')
     line.request(consumer='ublox-config', type=gpiod.LINE_REQ_DIR_OUT)
 
-    if len(sys.argv) == 2 and sys.argv[1] == 'stop':
-        return poweroff(line)
+    if len(sys.argv) == 2:
+        if sys.argv[1] == 'stop':
+            return poweroff(line)
+        elif sys.argv[1] == 'factory-reset':
+            return factory_reset()
+        else:
+            return help()
 
     # Power on
     line.set_value(1)
@@ -158,15 +185,7 @@ def main():
     rst = sim_config(ser) or rst
 
     if rst:
-        print("Resetting modem")
-        ser.write(b'AT+CFUN=16\r')
-
-        ser.close()
-        while os.path.exists(SERIAL_DEV):
-            time.sleep(1)
-        while not os.path.exists(SERIAL_DEV):
-            time.sleep(1)
-        ser = serial.Serial(SERIAL_DEV, 115200, timeout=0.5)
+        ser = reset_modem(ser)
 
     apn_setup(ser)
     config_dump.dump_modem_config(ser)