fixup! m1n1.fw.mtp: Fix parsing of init messages

Author: marcan

proxyclient/m1n1/fw/mtp.py

@@ -25,7 +25,7 @@ class InitBlock(ConstructClass):
                    Switch(this.type, {
                        0: HIDDescriptor,
                        1: GPIOInit,
-                       2: GreedyBytes, # Unknown 6 bytes
+                       2: GreedyBytes, # Unknown 6 bytes terminator
                        7: GreedyBytes, # Device name
                    }, default=GreedyBytes))
     )
@@ -255,7 +255,6 @@ def report(self, msg):
                     self.log(f"Got HID descriptor for {iface}:")
                     iface.descriptor = blk.payload.descriptor
                     self.log(hexdump(iface.descriptor))
-                    iface.initialize()
                 elif isinstance(blk.payload, GPIOInit):
                     self.log(f"GPIO Init: {blk.payload}")
                     prop = getattr(self.proto.node[msg.device_name],
@@ -264,6 +263,8 @@ def report(self, msg):
                     val = prop.args[1]
                     self.log(f"GPIO key: {key}")
                     self.gpios[(msg.device_id, blk.payload.gpio_id)] = key, val
+            if not msg.more_packets:
+                iface.initialize()
         elif isinstance(msg, GPIORequestMsg):
             self.log(f"GPIO request: {msg}")
             smcep = self.proto.smc.epmap[0x20]