[GP-1733] L6G1 Support - Capabilities cellWwan and cellPpp

Define the new "cellPpp" capability for radios that do not support PPP and do
not have the "modem_at0" interface. Set the "cellWwan" capability to "true" for
radios that do not support PPP, but also do not support QMI WWAN. Assumption:
radios without PPP and QMI WWAN support some other protocol, like ECM WWAN.

NOTE: L6G1 does not support PPP and uses ECM WWAN instead of QMI WWAN, hence
the radio does not have the "/dev/cdc-wdm0" interface and requires special
handling to set the "cellWwan" capability.

1 files changed, 13 insertions, 3 deletions

diff --git a/src/Device/Device.cpp b/src/Device/Device.cpp
index 6ef807e..5f0e281 100644
--- a/src/Device/Device.cpp
+++ b/src/Device/Device.cpp
@@ -37,6 +37,7 @@ std::map<std::string, bool> Device::capabilityList = {
     {"battery", false},
     {"bluetooth", false},
     {"cell", false},
+    {"cellPpp", false},
     {"cellWwan", false},
     {"din", false},
     {"dout", false},
@@ -316,9 +317,18 @@ void Device::mapFileToCapability() {
         S_IFREG) { /* lora-network-server is a regular file */
         capabilityList["loraNetworkServer"] = true;
     }
-    if (fileType("/dev/cdc-wdm0") ==
-        S_IFCHR) { /* Cellular modem is wwan/qmi character device */
-        capabilityList["cellWwan"] = true;
+    if (capabilityList["cell"]) { /* only on devices with Cellular */
+        if (fileType("/dev/cdc-wdm0") == S_IFCHR) {
+            /* Cellular modem is wwan/qmi/mbim character device */
+            capabilityList["cellWwan"] = true;
+        }
+        if (!fileExists("/dev/modem_at0") && fileType("/dev/modem_at1") == S_IFCHR) {
+            /* Cellular modem without PPP support, probably uses ECM WWAN */
+            capabilityList["cellWwan"] = true;
+        } else {
+            /* all other radios - assume PPP is supported */
+            capabilityList["cellPpp"] = true;
+        }
     }
     if (fileType("/dev/ext_serial") ==
         S_IFCHR) { /* ext_serial is a character device */