qmodem:improve simcom lte and asrmicro support (#190)

* modem: enhance Simcom support for LTE platform and update band configuration

* modem: add ASRMicro platform support for AT command configuration

* modem_dial: add simcom lte platform dial support

* modem_dial: check CFUN before dialing

* modem: add support for Simcom A8200C-M2 modem configuration

Author: FUjr

application/qmodem/files/usr/share/qmodem/modem_dial.sh

@@ -870,11 +870,19 @@ at_dial()
             ;;
         "simcom")
             case $platform in
+                "asrmicro")                    
+                    at_command="AT+CGACT=1,$pdp_index"
+                    cgdcont_command="AT+CGDCONT=$pdp_index,\"$pdp_type\""$apn_append
+                    ;;
                 "qualcomm")
                     local cnmp=$(at ${at_port} "AT+CNMP?" | grep "+CNMP:" | sed 's/+CNMP: //g' | sed 's/\r//g')
                     at_command="AT+CNMP=$cnmp;+CNWINFO=1"
                     cgdcont_command="AT+CGDCONT=1,\"$pdp_type\""$apn_append
                     ;;
+                "lte")
+                    at_command="AT+CGACT=1,$pdp_index"
+                    cgdcont_command="AT+CGDCONT=$pdp_index,\"$pdp_type\""$apn_append
+                    ;;
             esac
             ;;
         "meig")
@@ -1149,6 +1157,19 @@ handle_ip_change()
     esac
 }
 
+check_cfun(){
+    at_command="AT+CFUN?"
+    response=$(at ${at_port} "${at_command}")
+    cfun_status=$(echo "$response" | grep "+CFUN:" | awk '{print $2}')
+    if [ "$cfun_status" = "1" ]; then
+        return 0
+    else
+        at_command="AT+CFUN=1"
+        response=$(at ${at_port} "${at_command}")
+        return 1
+    fi
+}
+
 check_logfile_line()
 {
     local line=$(wc -l $log_file | awk '{print $1}')
@@ -1162,6 +1183,18 @@ unexpected_response_count=0
 at_dial_monitor()
 {
     #check if support auto dial
+    check_cfun
+    if [ $? -ne 0 ]; then
+        m_debug "CFUN is not 1, try to set it to 1"
+        sleep 5
+        check_cfun
+        if [ $? -ne 0 ]; then
+            m_debug "Failed to set CFUN to 1, continue with monitor"
+            return
+        else
+            m_debug "Successfully set CFUN to 1"
+        fi
+    fi
     auto_dial_support=0
     at_auto_dial
     auto_dial_support=$?

application/qmodem/files/usr/share/qmodem/modem_support.json

@@ -1105,21 +1105,35 @@
                     "rndis"
                 ]
             },
-            "a7605c": {
+            "a8200c-m2": {
                 "manufacturer_id": "1a0e",
                 "manufacturer": "simcom",
-                "platform": "lte",
+                "platform": "asrmicro",
                 "data_interface": "usb",
                 "pdp_index": "1",
                 "wcdma_band": "1/2/3/4/5/8",
                 "lte_band": "1/2/3/4/5/7/8/12/13/14/17/18/19/20/25/26/28/29/30/32/34/38/39/40/41/42/43/46/48/66/71",
                 "nsa_band": "1/2/3/5/7/8/12/20/28/38/40/41/48/66/71/77/78/79",
                 "sa_band": "1/2/3/5/7/8/12/20/28/38/40/41/48/66/71/77/78/79",
                 "modes": [
-                    "qmi",
+                    "ecm",
                     "rndis"
                 ]
             },
+            "a7605c": {
+                "manufacturer_id": "1a0e",
+                "manufacturer": "simcom",
+                "platform": "lte",
+                "data_interface": "usb",
+                "pdp_index": "1",
+                "wcdma_band": "23/50",
+                "lte_band": "1/3/5/8/34/38/39/40/41",
+                "modes": [
+                    "ecm",
+                    "rndis",
+                    "auto"
+                ]
+            },
             "simcom_d8200g": {
                 "manufacturer_id": "1a0e",
                 "manufacturer": "simcom",