/**
	*****************************************************************************
	* @file     cmem7_eth.h
	*
	* @brief    CMEM7 ethernet header file
	*
	*
	* @version  V1.0
	* @date     3. September 2013
	*
	* @note               
	*           
	*****************************************************************************
	* @attention
	*
	* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
	* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
	* TIME. AS A RESULT, CAPITAL-MICRO SHALL NOT BE HELD LIABLE FOR ANY DIRECT, 
	* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
	* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
	* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
	*
	* <h2><center>&copy; COPYRIGHT 2013 Capital-micro </center></h2>
	*****************************************************************************
	*/
	
#ifndef __CMEM7_ETH_H
#define __CMEM7_ETH_H

#ifdef __cplusplus
 extern "C" {
#endif

#include "cmem7.h"
#include "cmem7_conf.h"

/** @defgroup ETH_SPEED
  * @{
  */
#define ETH_SPEED_10M               0x0
#define ETH_SPEED_100M              0x1
#define ETH_SPEED_1000M             0x2

#define IS_ETH_SPEED(SPEED)    			(((SPEED) == ETH_SPEED_10M)  || \
                                     ((SPEED) == ETH_SPEED_100M) || \
																		 ((SPEED) == ETH_SPEED_1000M))
/**
  * @}
  */

/** @defgroup ETH_DUPLEX
  * @{
  */
#define ETH_DUPLEX_HALF             0x0
#define ETH_DUPLEX_FULL             0x1

#define IS_ETH_DUPLEX(DUPLEX)  			(((DUPLEX) == ETH_DUPLEX_HALF) || \
																		 ((DUPLEX) == ETH_DUPLEX_FULL))
/**
  * @}
  */

/** @defgroup ETH_INT
  * @{
  */																			
#define ETH_INT_TX_COMPLETE_FRAME		0x0001
#define ETH_INT_TX_STOP             0x0002
#define ETH_INT_TX_BUF_UNAVAI       0x0004
#define ETH_INT_RX_OVERFLOW					0x0010
#define ETH_INT_TX_UNDERFLOW				0x0020
#define ETH_INT_RX_COMPLETE_FRAME   0x0040
#define ETH_INT_RX_BUF_UNAVAI       0x0080
#define ETH_INT_RX_STOP             0x0100
#define ETH_INT_BUS_FATAL_ERROR     0x2000
#define ETH_INT_ALL                 (ETH_INT_TX_COMPLETE_FRAME | \
                                     ETH_INT_TX_STOP           | \
																		 ETH_INT_TX_BUF_UNAVAI     | \
																		 ETH_INT_RX_OVERFLOW       | \
																		 ETH_INT_TX_UNDERFLOW      | \
																		 ETH_INT_RX_COMPLETE_FRAME | \
																		 ETH_INT_RX_BUF_UNAVAI     | \
																		 ETH_INT_RX_STOP           | \
																		 ETH_INT_BUS_FATAL_ERROR)

#define IS_ETH_INT(INT)             (((INT) != 0) && (((INT) & ~ETH_INT_ALL) == 0))
/**
  * @}
  */

/**
  * @brief  EFUSE receive filter structure
	*/
typedef struct
{
	BOOL ETH_BroadcastFilterEnable;   /*!< Broadcast is dropped or passed								        */ 
	BOOL ETH_OwnFilterEnable;	        /*!< source address filter is on or off     							*/
	BOOL ETH_SelfDrop;				  			/*!< Only own address is dropped or passed								*/
	BOOL ETH_SourceFilterEnable;	    /*!< source address filter is on or off     							*/
	BOOL ETH_SourceDrop;				      /*!< Only specific source address is dropped or passed  	*/
	uint8_t ETH_SourceMacAddr[6];     /*!< Source MAC address                                   */
} ETH_FrameFilter;

/**
  * @brief  Ethernet initialization structure
	*/ 
typedef struct
{
  BOOL ETH_LinkUp;                   /*!< If ETH is linked up and it can be retrieved from PHY */																	  
	uint8_t ETH_Speed;                 /*!< speed of ETH, refer as @ref ETH_SPEED                */
  uint8_t ETH_Duplex;                /*!< duplex mode of ETH, refer as @ref ETH_DUPLEX				 */
	BOOL ETH_RxEn;                     /*!< Rx enable                                            */
	BOOL ETH_TxEn;                     /*!< Tx enable                                            */
	BOOL ETH_ChecksumOffload;          /*!< Checksum offload enable                              */
	BOOL ETH_JumboFrame;               /*!< Jumbo Frame Enable                                   */
	uint8_t ETH_MacAddr[6];            /*!< MAC address                                          */ 
  ETH_FrameFilter *ETH_Filter;       /*!< Received frame address filter, receive all if null   */
} ETH_InitTypeDef;

/**
  * @brief  Ethernet Tx descriptor structure
	*/ 
typedef struct { 
	union {
    uint32_t  TX0;
		
		struct {
			uint32_t 								:  1;
			uint32_t UNDERFLOW_ERR  :  1; 	 /*!< [OUT] Underflow error            											*/
			uint32_t 								:  1;
			uint32_t COLLISION_CNT	:  4;		 /*!< [OUT] Collision count				                          */
			uint32_t 								:  1;
			uint32_t EX_COLLISION 	:  1;		 /*!< [OUT] Excessive collision error	                      */
			uint32_t LATE_COLLISION :  1;		 /*!< [OUT] Late collision error	                          */
			uint32_t NO_CARRIER     :  1;		 /*!< [OUT] No carrier error                          			*/
			uint32_t LOSS_CARRIER   :  1;		 /*!< [OUT] loss of carrier error                          	*/
			uint32_t PAYLOAD_ERR 		:  1;		 /*!< [OUT] IP payload error                          			*/
			uint32_t 								:  2;
			uint32_t ERR_SUM 				:  1;		 /*!< [OUT] Error summary		                          			*/
			uint32_t HEADER_ERR 		:  1;		 /*!< [OUT] IP header error                          				*/
			uint32_t 								:  8;
			uint32_t TTSE           :  1; 	 /*!< enables IEEE1588 hardware timestamping in first segment */
			uint32_t 								:  2;
			uint32_t FS           	:  1; 	 /*!< first segment flag                                    */
			uint32_t LS           	:  1; 	 /*!< last segment flag                                     */
			uint32_t 								:  2;
		} TX0_b;
	} TX_0;
	
	union {
    uint32_t  TX1;
		
		struct {
			uint32_t SIZE						: 13; 	 	/*!< buffer size                                       */
			uint32_t                : 19;
		} TX1_b;
	} TX_1;
	
	uint32_t bufAddr;											/*!< address of buffer						                     */
	uint32_t nextDescAddr;								/*!< address of next descriptor		                     */
  uint64_t reserved;
	uint64_t timeStamp;									 	/*!< time stamp while last segment                     */
} ETH_TX_DESC;

/**
  * @brief  Ethernet Rx descriptor structure
	*/ 
typedef struct { 
	union {
    uint32_t  RX0;
		
		struct {
			uint32_t 								:  1;
			uint32_t CRC_ERR        :  1; 	 /*!< [OUT] CRC error while last segment                		*/
			uint32_t 								:  5;
			uint32_t TTSE           :  1; 	 /*!< timestamp available while last segment                */
			uint32_t LS           	:  1; 	 /*!< last segment flag                                     */
			uint32_t FS           	:  1; 	 /*!< first segment flag                                    */
			uint32_t 								:  1;
			uint32_t OVERFLOW_ERR   :  1; 	 /*!< [OUT] FIFO overflow while last segment                */
			uint32_t LENGTH_ERR     :  1; 	 /*!< [OUT] length error while last segment                	*/
			uint32_t 								:  2;
			uint32_t ERR_SUM        :  1; 	 /*!< [OUT] Error summary while last segment              	*/
			uint32_t FL           	: 14; 	 /*!< frame length while last segment                       */
			uint32_t 		           	:  2;
		} RX0_b;
	} RX_0;
	
	union {
    uint32_t  RX1;
		
		struct {
			uint32_t SIZE						: 13; 	 	/*!< buffer size                                       */
			uint32_t                : 19;
		} RX1_b;
	} RX_1;
	
	uint32_t bufAddr;											/*!< buffer address                                    */
	uint32_t nextDescAddr;								/*!< address of next descriptor                        */
  uint64_t reserved;
	uint64_t timeStamp;									 	/*!< time stamp while the last segment                 */
} ETH_RX_DESC;

/**
  * @brief  Read data from phy chip
	* @param[in] phyAddr Address of phy chip
	* @param[in] phyReg Address of phy's register to be read
  * @retval uint32_t value of phy's register
	*/
uint32_t ETH_PhyRead(uint32_t phyAddr, uint32_t phyReg);

/**
  * @brief  Write data to phy chip
	* @param[in] phyAddr Address of phy chip
	* @param[in] phyReg Address of phy's register to be written
	* @param[in] data Data to be written
  * @retval None
	*/
void ETH_PhyWrite(uint32_t phyAddr, uint32_t phyReg, uint32_t data);

/**
  * @brief  Ethernet initialization
  * @note   This function should be called at first before any other interfaces.
	* @param[in] init A pointer to structure ETH_InitTypeDef
  * @retval BOOL The bit indicates if ethernet is initialized successfully
	*/ 
BOOL ETH_Init(ETH_InitTypeDef *init);

/**
  * @brief  Enable or disable ethernet interrupt. 
	* @param[in] Int interrupt mask bits, which can be the combination of @ref ETH_INT
	* @param[in] Enable The bit indicates if specific interrupts are enable or not
  * @retval None
	*/ 
void ETH_EnableInt(uint32_t Int, BOOL enable);

/**
  * @brief  Check specific interrupts are set or not 
	* @param[in] Int interrupt mask bits, which can be the combination of @ref ETH_INT
  * @retval BOOL The bit indicates if specific interrupts are set or not
	*/
BOOL ETH_GetIntStatus(uint32_t Int);

/**
  * @brief  Clear specific interrupts
	* @param[in] Int interrupt mask bits, which can be the combination of @ref ETH_INT
  * @retval None
	*/
void ETH_ClearInt(uint32_t Int);

/**
  * @brief  Get ethernte MAC address
	* @param[in] mac A user-allocated buffer to fetch MAC to be read, 6 bytes.
	* @retval None
	*/
void ETH_GetMacAddr(uint8_t *mac);

/**
  * @brief  Set ethernet transmission descriptor ring 
	* @note		Make sure that memory occupied by descriptors should be in physical
	*					memory and keep valid before ethernet transmission is finished.
	* @param[in] ring A pointer to header of ETH_TX_DESC ring, whose last node 
	*					has a 'nextDescAddr' pointed to first node.
  * @retval BOOL The bit indicates if valid ring is set
	*/
BOOL ETH_SetTxDescRing(ETH_TX_DESC *ring);

/**
  * @brief  Start ethernet transmission
	* @param	None
  * @retval None
	*/
void ETH_StartTx(void);

/**
  * @brief  Stop ethernet transmission
	* @param	None
  * @retval None
	*/
void ETH_StopTx(void);

/**
  * @brief  Resume ethernet transmission\n
	* 				While ethernet doesn't have enough buffer to transmit data, it will
	*					pause and inform users by interrupt 'ETH_INT_TX_BUF_UNAVAI'. Users
	*					must call this function to start ethernet again after new buffer 
	*					prepared.
	* @param	None
  * @retval None
	*/
void ETH_ResumeTx(void);

/**
  * @brief  Get free transmission descriptor\n
	* @param	None
  * @retval ETH_TX_DESC* A pointer of free transmission descriptor, 
	*					NULL if no free descriptor
	*/
ETH_TX_DESC *ETH_AcquireFreeTxDesc(void);

/**
  * @brief  Check if a transmission descriptor is free or not
	* @param	desc A pointer of a transmission descriptor
  * @retval BOOL True if the transmission descriptor is free, or flase.
	*/
BOOL ETH_IsFreeTxDesc(ETH_TX_DESC *desc);

/**
  * @brief  Release a transmission descriptor to ethernet\n
	*					After users prepared data in the buffer of a free descriptor,
	*					They must call this function to change ownership of the 
	*					descriptor to hardware.
	* @param	desc A pointer of a transmission descriptor
  * @retval None
	*/
void ETH_ReleaseTxDesc(ETH_TX_DESC *desc);

/**
  * @brief  Set ethernet receive descriptor ring
	* @note		Make sure that memory occupied by descriptors should be in physical
	*					memory and keep valid before ethernet receive is finished.
	* @param[in] ring A pointer to header of ETH_TX_DESC ring, whose last node 
	*					has a 'nextDescAddr' pointed to first node.
  * @retval BOOL The bit indicates if valid ring is set
	*/
BOOL ETH_SetRxDescRing(ETH_RX_DESC *ring);

/**
  * @brief  Start ethernet receive
	* @param	None
  * @retval None
	*/
void ETH_StartRx(void);

/**
  * @brief  Stop ethernet receive
	* @param	None
  * @retval None
	*/
void ETH_StopRx(void);

/**
  * @brief  Resume ethernet receive\n
	* 				While ethernet doesn't have enough buffer to receive data, it will
	*					pause and inform users by interrupt 'ETH_INT_RX_BUF_UNAVAI'. Users
	*					must call this function to start ethernet again after new buffer 
	*					prepared.
	* @param	None
  * @retval None
	*/
void ETH_ResumeRx(void);

/**
  * @brief  Get the free descriptor which contains received data\n
	* @param	None
  * @retval ETH_RX_DESC* A pointer of free receive descriptor, 
	*					NULL if no free descriptor
	*/
ETH_RX_DESC *ETH_AcquireFreeRxDesc(void);

/**
  * @brief  Check if a receive descriptor is free or not
	* @param	desc A pointer of a receive descriptor
  * @retval BOOL True if the receive descriptor is free, or flase.
	*/
BOOL ETH_IsFreeRxDesc(ETH_RX_DESC *desc);

/**
  * @brief  Release a receive descriptor to ethernet\n
	*					After users handled data in the buffer of a free descriptor,
	*					They must call this function to change ownership of the 
	*					descriptor to hardware.
	* @param	desc A pointer of a transmission descriptor
  * @retval None
	*/
void ETH_ReleaseRxDesc(ETH_RX_DESC *desc);

#ifdef __cplusplus
}
#endif

#endif /* __CMEM7_ETH_H */