Add network device driver model, netdev

wifinina/debug.go

@@ -1,5 +1,17 @@
-//go:build wifidebug
-
 package wifinina
 
-var _debug = true
+type debug uint8
+
+const (
+	debugBasic  debug = 1 << iota // show fw version, mac addr, etc
+	debugNetdev                   // show netdev entry points
+	debugCmd                      // show non-chatty wifinina cmds
+	debugDetail                   // show chatty wifinina cmds
+
+	debugOff = 0
+	debugAll = debugBasic | debugNetdev | debugCmd | debugDetail
+)
+
+func debugging(want debug) bool {
+	return (_debug & want) != 0
+}