ubus_qmodem: add get_avalible_device method

Author: FUjr

application/qmodem/files/usr/libexec/rpcd/qmodem

@@ -285,6 +285,7 @@ case "$1" in
     "scan_all": {},
     "get_pcie_devices": {},
     "get_usb_devices": {},
+    "get_available_devices": {},
     "get_leds": {},
     "get_network_interfaces": {},
     "get_tty_ports": {}
@@ -743,6 +744,43 @@ EOF
                 json_dump
                 ;;
 
+            get_available_devices)
+                json_init
+                json_add_object "devices"
+                # Add PCIe devices
+                if [ -d "/sys/bus/pci/devices/" ]; then
+                    for device in /sys/bus/pci/devices/*; do
+                        [ -e "$device" ] || continue
+                        device_id=$(basename "$device")
+                        # Convert to UCI-safe name
+                        uci_name=$(echo "$device_id" | sed 's/\./_/g; s/:/_/g; s/-/_/g')
+                        json_add_object "$uci_name"
+                        json_add_string "label" "$device_id [pcie]"
+                        json_add_string "type" "pcie"
+                        json_add_string "path" "/sys/bus/pci/devices/$device_id"
+                        json_close_object
+                    done
+                fi
+                # Add USB devices
+                if [ -d "/sys/bus/usb/devices/" ]; then
+                    for device in /sys/bus/usb/devices/*; do
+                        [ -e "$device" ] || continue
+                        device_id=$(basename "$device")
+                        # Skip root hubs (usb1, usb2, etc.)
+                        echo "$device_id" | grep -q '^usb[0-9]\+$' && continue
+                        # Convert to UCI-safe name
+                        uci_name=$(echo "$device_id" | sed 's/\./_/g; s/:/_/g; s/-/_/g')
+                        json_add_object "$uci_name"
+                        json_add_string "label" "$device_id [usb]"
+                        json_add_string "type" "usb"
+                        json_add_string "path" "/sys/bus/usb/devices/$device_id"
+                        json_close_object
+                    done
+                fi
+                json_close_object
+                json_dump
+                ;;
+            
             get_leds)
                 json_init
                 json_add_array "leds"