ieee802154 wpan radio protocol over USB

Overview
========

The document describes protocol between 802.15.4 physical radio and Linux
kernel driver over USB. Protocol is based on atusb Linux driver protocol
found inside Linux kernel: drivers/net/ieee802154/atusb.h

Packet structure
================

Command opcodes are inside bRequest field. bRequest and wIndex are one octet
long.

Commands from Host to Device
============================

USB Control endpoint, Vendor commands

	Opcode 0x00 - Reset		bRequest

		Reset the Radio

	Opcode 0x01 - Transmit		bRequest

		Sequence number		wIndex
		Data length		wLength

		Transmit data from Host to Device

	Opcode 0x02 - Transmit Async	bRequest

		TBD

	Opcode 0x03 - ED		bRequest

		TBD

	Opcode 0x04 - Set Channel	bRequest

		Set ieee802154 channel

		Page		1 octet
		Channel		1 octet

	Opcode 0x05 - Start		bRequest

		Start ieee802154 device

	Opcode 0x06 - Stop		bRequest

		Stop ieee802154 device

	Opcode 0x07 - Set Short address	bRequest

		Set ieee802154 Short address

		Short address	2 octets

	Opcode 0x08 - Set PAN ID	bRequest

		Set ieee802154 PAN ID

		PAN ID		2 octets

	Opcode 0x09 - Set address	bRequest

		Set ieee802154 address

		address		8 octets

	Opcode 0x0A - Set TX Power	bRequest

		TBD

	Opcode 0x0B - Set CCA Mode	bRequest

		TBD

	Opcode 0x0C - Set CCA ED level	bRequest

		TBD

	Opcode 0x0D - Set CSMA Params	bRequest

		TBD

	Opcode 0x0E - Set Promisc mode	bRequest

		TBD

Data from Device to Host
========================

USB BULK IN endpoint

	Transmit ACK

		Length		1 octet
		Data		Sequence number

	Data

		Length		1 octet
		Data		Data
		LQI		1 octet
