/*
             LUFA Library
     Copyright (C) Dean Camera, 2012.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Header file for RFCOMM.c.
 */

#ifndef _RFCOMM_H_
#define _RFCOMM_H_

	/* Includes: */
		#include <avr/io.h>
		#include <avr/pgmspace.h>
		#include <string.h>
		#include <stdbool.h>
		#include <stdio.h>

		#include <LUFA/Common/Common.h>
		#include <LUFA/Drivers/Peripheral/Serial.h>

		#include "BluetoothStack.h"
		#include "RFCOMMControl.h"

	/* Macros: */
		#define BT_RFCOMM_DEBUG(l, s, ...)              do { if (RFCOMM_DEBUG_LEVEL >= l) printf_P(PSTR("(RFCOMM) " s "\r\n"), ##__VA_ARGS__); } while (0)
		#define RFCOMM_DEBUG_LEVEL                      0

		#define FRAME_POLL_FINAL                        (1 << 4)

		#define RFCOMM_CONTROL_DLCI                     0
		#define RFCOMM_MAX_OPEN_CHANNELS                5

	/* Enums: */
		/** Enum for the types of RFCOMM frames which can be exchanged on a Bluetooth channel. */
		enum RFCOMM_Frame_Types_t
		{
			RFCOMM_Frame_DM    = 0x0F, /**< Disconnected Mode Field */
			RFCOMM_Frame_DISC  = 0x43, /**< Disconnect Field */
			RFCOMM_Frame_SABM  = 0x2F, /**< Set Asynchronous Balance Mode Field */
			RFCOMM_Frame_UA    = 0x63, /**< Unnumbered Acknowledgement Field */
			RFCOMM_Frame_UIH   = 0xEF, /**< Unnumbered Information with Header check Field */
		};

		enum RFCOMM_Channel_States_t
		{
			RFCOMM_Channel_Closed      = 0,
			RFCOMM_Channel_Configure   = 1,
			RFCOMM_Channel_Open        = 2,
		};

	/* Type Defines: */
		typedef struct
		{
			uint8_t  DLCI;
			uint8_t  State;
			uint8_t  Priority;
			uint16_t MTU;
			uint8_t  ConfigFlags;
			struct
			{
				uint8_t Signals;
				uint8_t BreakSignal;
			} Remote;
			struct
			{
				uint8_t Signals;
				uint8_t BreakSignal;
			} Local;
		} RFCOMM_Channel_t;

	/* External Variables: */
		extern RFCOMM_Channel_t RFCOMM_Channels[RFCOMM_MAX_OPEN_CHANNELS];

	/* Function Prototypes: */
		void              RFCOMM_Initialize(void);
		void              RFCOMM_ServiceChannels(Bluetooth_Channel_t* const ACLChannel);
		void              RFCOMM_ProcessPacket(void* Data,
		                                       Bluetooth_Channel_t* const ACLChannel);

		void              RFCOMM_SendChannelSignals(const RFCOMM_Channel_t* const RFCOMMChannel,
		                                            Bluetooth_Channel_t* const ACLChannel);
		void              RFCOMM_SendData(const uint16_t DataLen,
		                                  const uint8_t* Data,
		                                  const RFCOMM_Channel_t* const RFCOMMChannel,
		                                  Bluetooth_Channel_t* const ACLChannel);

		void              RFCOMM_ChannelOpened(RFCOMM_Channel_t* const RFCOMMChannel);
		void              RFCOMM_DataReceived(RFCOMM_Channel_t* const RFCOMMChannel,
		                                      uint16_t DataLen,
		                                      const uint8_t* Data);
		void              RFCOMM_ChannelSignalsReceived(RFCOMM_Channel_t* const RFCOMMChannel);

		RFCOMM_Channel_t* RFCOMM_GetFreeChannelEntry(const uint8_t DLCI);
		RFCOMM_Channel_t* RFCOMM_GetChannelData(const uint8_t DLCI);
		uint16_t          RFCOMM_GetVariableFieldValue(const uint8_t** BufferPos);
		void              RFCOMM_SendFrame(const uint8_t DLCI,
		                                   const bool CommandResponse,
		                                   const uint8_t Control,
			                               const uint16_t DataLen,
		                                   const void* Data,
		                                   Bluetooth_Channel_t* const ACLChannel);

		#if defined(INCLUDE_FROM_RFCOMM_C)
			static uint8_t RFCOMM_GetFCSValue(const void* FrameStart,
			                                  uint8_t Length);

			static void RFCOMM_ProcessDM(const RFCOMM_Address_t* const FrameAddress,
			                             Bluetooth_Channel_t* const ACLChannel);
			static void RFCOMM_ProcessDISC(const RFCOMM_Address_t* const FrameAddress,
			                               Bluetooth_Channel_t* const ACLChannel);
			static void RFCOMM_ProcessSABM(const RFCOMM_Address_t* const FrameAddress,
			                               Bluetooth_Channel_t* const ACLChannel);
			static void RFCOMM_ProcessUA(const RFCOMM_Address_t* const FrameAddress,
			                             Bluetooth_Channel_t* const ACLChannel);
			static void RFCOMM_ProcessUIH(const RFCOMM_Address_t* const FrameAddress,
			                              const uint16_t FrameLength,
                                          const uint8_t* FrameData,
			                              Bluetooth_Channel_t* const ACLChannel);
		#endif

#endif