/* Copyright (C) 2012 Kristian Lauszus, TKJ Electronics. All rights reserved.
 
 This software may be distributed and modified under the terms of the GNU
 General Public License version 2 (GPL2) as published by the Free Software
 Foundation and appearing in the file GPL2.TXT included in the packaging of
 this file. Please note that GPL2 Section 2[b] requires that all works based
 on this software must also be made publicly available under the terms of
 the GPL2 ("Copyleft").
 
 Contact information
 -------------------
 
 Kristian Lauszus, TKJ Electronics
 Web      :  http://www.tkjelectronics.com
 e-mail   :  kristianl@tkjelectronics.com
 */

#ifndef _btd_h_
#define _btd_h_

#include "Usb.h"
#include "confdescparser.h"

//PID and VID of the Sony PS3 devices
#define PS3_VID             0x054C  // Sony Corporation
#define PS3_PID             0x0268  // PS3 Controller DualShock 3
#define PS3NAVIGATION_PID   0x042F  // Navigation controller
#define PS3MOVE_PID         0x03D5  // Motion controller

/* Bluetooth dongle data taken from descriptors */
#define BULK_MAXPKTSIZE     64 // max size for ACL data

// Used in control endpoint header for HCI Commands
#define bmREQ_HCI_OUT USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_DEVICE
// Used in control endpoint header for HID Commands
#define bmREQ_HID_OUT USB_SETUP_HOST_TO_DEVICE|USB_SETUP_TYPE_CLASS|USB_SETUP_RECIPIENT_INTERFACE
#define HID_REQUEST_SET_REPORT      0x09

/* Bluetooth HCI states for hci_task() */
#define HCI_INIT_STATE          0
#define HCI_RESET_STATE         1
#define HCI_BDADDR_STATE        2
#define HCI_LOCAL_VERSION_STATE 3
#define HCI_SET_NAME_STATE      4
#define HCI_SCANNING_STATE      5
#define HCI_CONNECT_IN_STATE    6
#define HCI_REMOTE_NAME_STATE   7
#define HCI_CONNECTED_STATE     8
#define HCI_DISABLE_SCAN_STATE  9
#define HCI_DONE_STATE          10
#define HCI_DISCONNECT_STATE    11

/* HCI event flags*/
#define HCI_FLAG_CMD_COMPLETE           0x01
#define HCI_FLAG_CONN_COMPLETE          0x02
#define HCI_FLAG_DISCONN_COMPLETE       0x04
#define HCI_FLAG_REMOTE_NAME_COMPLETE   0x08
#define HCI_FLAG_INCOMING_REQUEST       0x10
#define HCI_FLAG_READ_BDADDR            0x20
#define HCI_FLAG_READ_VERSION           0x40

/*Macros for HCI event flag tests */
#define hci_cmd_complete (hci_event_flag & HCI_FLAG_CMD_COMPLETE)
#define hci_connect_complete (hci_event_flag & HCI_FLAG_CONN_COMPLETE)
#define hci_disconnect_complete (hci_event_flag & HCI_FLAG_DISCONN_COMPLETE)
#define hci_remote_name_complete (hci_event_flag & HCI_FLAG_REMOTE_NAME_COMPLETE)
#define hci_incoming_connect_request (hci_event_flag & HCI_FLAG_INCOMING_REQUEST)
#define hci_read_bdaddr_complete (hci_event_flag & HCI_FLAG_READ_BDADDR)
#define hci_read_version_complete (hci_event_flag & HCI_FLAG_READ_VERSION)

/* HCI Events managed */
#define EV_CONNECT_COMPLETE                             0x03
#define EV_INCOMING_CONNECT                             0x04
#define EV_DISCONNECT_COMPLETE                          0x05
#define EV_AUTHENTICATION_COMPLETE                      0x06
#define EV_REMOTE_NAME_COMPLETE                         0x07
#define EV_ENCRYPTION_CHANGE                            0x08
#define EV_CHANGE_CONNECTION_LINK                       0x09
#define EV_ROLE_CHANGED                                 0x12
#define EV_NUM_COMPLETE_PKT                             0x13
#define EV_PIN_CODE_REQUEST                             0x16
#define EV_LINK_KEY_REQUEST                             0x17
#define EV_LINK_KEY_NOTIFICATION                        0x18
#define EV_DATA_BUFFER_OVERFLOW                         0x1A
#define EV_MAX_SLOTS_CHANGE                             0x1B
#define EV_READ_REMOTE_VERSION_INFORMATION_COMPLETE     0x0C
#define EV_QOS_SETUP_COMPLETE                           0x0D
#define EV_COMMAND_COMPLETE                             0x0E
#define EV_COMMAND_STATUS                               0x0F
#define EV_LOOPBACK_COMMAND                             0x19
#define EV_PAGE_SCAN_REP_MODE                           0x20

/* L2CAP signaling commands */
#define L2CAP_CMD_COMMAND_REJECT        0x01
#define L2CAP_CMD_CONNECTION_REQUEST    0x02
#define L2CAP_CMD_CONNECTION_RESPONSE   0x03
#define L2CAP_CMD_CONFIG_REQUEST        0x04
#define L2CAP_CMD_CONFIG_RESPONSE       0x05
#define L2CAP_CMD_DISCONNECT_REQUEST    0x06
#define L2CAP_CMD_DISCONNECT_RESPONSE   0x07
#define L2CAP_CMD_INFORMATION_REQUEST   0x0A
#define L2CAP_CMD_INFORMATION_RESPONSE  0x0B

// Used For Connection Response - Remember to Include High Byte
#define PENDING     0x01
#define SUCCESSFUL  0x00

// Used to determine if it is a Bluetooth dongle
#define WI_SUBCLASS_RF      0x01 // RF Controller
#define WI_PROTOCOL_BT      0x01 // Bluetooth Programming Interface

#define BTD_MAX_ENDPOINTS   4
#define BTD_NUMDEVICES		7		// Max number of Bluetooth devices

class BluetoothService { // All services should include this class
public:
    virtual void ACLData(uint8_t* ACLData); // Used to pass acldata to the services
    virtual void Poll(); // Used to run the different state machines
    virtual void Release(); // Used to reset the services
    virtual void disconnect(); // Used to disconnect both the L2CAP Channel and the HCI Connection
};

class BTD : public USBDeviceConfig, public UsbConfigXtracter {
public:
    BTD(USB *p); // Constructor
    
    // USBDeviceConfig implementation
    virtual uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
    virtual uint8_t Release();
    virtual uint8_t Poll();
    virtual uint8_t GetAddress() { return bAddress; };
    virtual bool isReady() { return bPollEnable; };
    
    // UsbConfigXtracter implementation, used to extract endpoint information
	virtual void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);        
    
    bool watingForConnection; // Use this to see if it is waiting for a incoming connection    
    void disconnect() { // Used this void to disconnect all services
        for (uint8_t i=0; i<BTD_NUMDEVICES; i++)
            if (btService[i])
                btService[i]->disconnect(); // Disconnect both the L2CAP Channel and the HCI Connection
    };
    
    /* Register bluetooth dongle members/services */
    uint8_t registerServiceClass(BluetoothService *pService) {
        for (uint8_t i=0; i<BTD_NUMDEVICES; i++) {
            if (!btService[i]) {
                btService[i] = pService;
                return 0; // Success
            }
        }
        return 1; // ErrorregisterServiceClass
    };    
    
    void claimConnection() { connectionClaimed = true; }; // This is used by the service to know when to store the device information
    bool connectionClaimed;
    
    const char* btdName; // These are set by the SPP library
    const char* btdPin;
    
    uint8_t my_bdaddr[6]; // The bluetooth dongles Bluetooth address
    uint16_t hci_handle; // HCI handle for the last connection
    uint8_t disc_bdaddr[6]; // Last incoming devices Bluetooth address
    uint8_t remote_name[30]; // First 30 chars of last remote name
    uint8_t hci_version;
    
    /* HCI Commands */
    void HCI_Command(uint8_t* data, uint16_t nbytes);
    void hci_reset();
    void hci_read_bdaddr();
    void hci_read_local_version_information();
    void hci_set_local_name(const char* name);
    void hci_write_scan_enable();
    void hci_remote_name();
    void hci_accept_connection();
    void hci_write_scan_disable();
    void hci_disconnect(uint16_t handle);
    void hci_pin_code_request_reply(const char* key);
    void hci_pin_code_negative_request_reply();
    void hci_link_key_request_negative_reply();
    
    /* L2CAP Commands */
    void L2CAP_Command(uint16_t handle, uint8_t* data, uint8_t nbytes, uint8_t channelLow = 0x01, uint8_t channelHigh = 0x00); // Standard L2CAP header: Channel ID (0x01) for ACL-U
    void l2cap_connection_response(uint16_t handle, uint8_t rxid, uint8_t* dcid, uint8_t* scid, uint8_t result);
    void l2cap_config_request(uint16_t handle, uint8_t rxid, uint8_t* dcid);
    void l2cap_config_response(uint16_t handle, uint8_t rxid, uint8_t* scid);
    void l2cap_disconnection_request(uint16_t handle, uint8_t rxid, uint8_t* dcid, uint8_t* scid);
    void l2cap_disconnection_response(uint16_t handle, uint8_t rxid, uint8_t* dcid, uint8_t* scid);
    void l2cap_information_response(uint16_t handle, uint8_t rxid, uint8_t infoTypeLow, uint8_t infoTypeHigh);
    
protected:
    /* Mandatory USB members */
    USB *pUsb;
    uint8_t	bAddress; // Device address
    EpInfo epInfo[BTD_MAX_ENDPOINTS]; // Endpoint info structure
    
    uint8_t bConfNum; // Configuration number
    uint8_t	bNumEP; // Total number of endpoints in the configuration
    uint32_t qNextPollTime;	// Next poll time
    
    #define BTD_CONTROL_PIPE 0 // Bluetooth dongles control endpoint
    static const uint8_t BTD_EVENT_PIPE; // HCI event endpoint index
    static const uint8_t BTD_DATAIN_PIPE; // ACL In endpoint index
    static const uint8_t BTD_DATAOUT_PIPE; // ACL Out endpoint index
    
    void PrintEndpointDescriptor(const USB_ENDPOINT_DESCRIPTOR* ep_ptr);        
    
private:
    BluetoothService* btService[BTD_NUMDEVICES];
    
    bool bPollEnable;
    uint8_t pollInterval;
    
    /* variables used by high level HCI task */    
    uint8_t hci_state;  //current state of bluetooth hci connection
    uint16_t hci_counter; // counter used for bluetooth hci reset loops
    uint8_t hci_num_reset_loops; // this value indicate how many times it should read before trying to reset
    uint16_t hci_event_flag; // hci flags of received bluetooth events    
           
    uint8_t hcibuf[BULK_MAXPKTSIZE];//General purpose buffer for hci data
    uint8_t l2capinbuf[BULK_MAXPKTSIZE];//General purpose buffer for l2cap in data
    uint8_t l2capoutbuf[BULK_MAXPKTSIZE];//General purpose buffer for l2cap out data
    
    /* State machines */
    void HCI_event_task(); // Poll the HCI event pipe
    void HCI_task(); // HCI state machine
    void ACL_event_task(); // ACL input pipe
    
    /* Used to set the Bluetooth Address internally to the PS3 Controllers */
    void setBdaddr(uint8_t* BDADDR);
    void setMoveBdaddr(uint8_t* BDADDR);
};
#endif