/**
 *  \file   emac.h
 *
 *  \brief  EMAC APIs and macros.
 *
 *   This file contains the driver API prototypes and macro definitions.
 */

/* 
* Copyright (C) 2009-2018 Texas Instruments Incorporated - www.ti.com  
* 
* 
*  Redistribution and use in source and binary forms, with or without 
*  modification, are permitted provided that the following conditions 
*  are met:
*
*    Redistributions of source code must retain the above copyright 
*    notice, this list of conditions and the following disclaimer.
*
*    Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the 
*    documentation and/or other materials provided with the   
*    distribution.
*
*    Neither the name of Texas Instruments Incorporated nor the names of
*    its contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
*  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
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*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/


#ifndef __EMAC_H__
#define __EMAC_H__

/* USER CODE BEGIN (0) */
/* USER CODE END */

#include "sys_common.h"
#include "hw_reg_access.h"
#include "hw_emac.h"
#include "hw_emac_ctrl.h"
#include "mdio.h"
#include "phy_dp83640.h"

#ifdef __cplusplus
extern "C" {
#endif

/* USER CODE BEGIN (1) */
/* USER CODE END */

/*****************************************************************************/
/*
** Macros which can be used as speed parameter to the API EMACRMIISpeedSet
*/
#define EMAC_RMIISPEED_10MBPS                 (0x00000000U)
#define EMAC_RMIISPEED_100MBPS                (0x00008000U)

/* Macros for enabling taken as inputs from HALCoGen GUI. */
#define EMAC_TX_ENABLE					(1U)				
#define EMAC_RX_ENABLE					(1U)
#define EMAC_MII_ENABLE					(1U)
#define EMAC_FULL_DUPLEX_ENABLE			(1U)
#define EMAC_LOOPBACK_ENABLE			(0U)
#define EMAC_BROADCAST_ENABLE			(1U)
#define EMAC_UNICAST_ENABLE				(1U)
#define EMAC_CHANNELNUMBER					(0U)
#define EMAC_PHYADDRESS						(0U)

/*
 * Macros to indicate EMAC Channel Numbers
 */
#define EMAC_CHANNEL_0						  (0x00000000U)
#define EMAC_CHANNEL_1						  (0x00000001U)
#define EMAC_CHANNEL_2						  (0x00000002U)
#define EMAC_CHANNEL_3						  (0x00000003U)
#define EMAC_CHANNEL_4						  (0x00000004U)
#define EMAC_CHANNEL_5						  (0x00000005U)
#define EMAC_CHANNEL_6						  (0x00000006U)
#define EMAC_CHANNEL_7						  (0x00000007U)
/* Macros which can be used as duplexMode parameter to the API 
** EMACDuplexSet
*/
#define EMAC_DUPLEX_FULL                      (0x00000001U)
#define EMAC_DUPLEX_HALF                      (0x00000000U)

/*
** Macros which can be used as matchFilt  parameters to the API 
** EMACMACAddrSet
*/
/* Address not used to match/filter incoming packets */
#define EMAC_MACADDR_NO_MATCH_NO_FILTER       (0x00000000U)

/* Address will be used to filter incoming packets */
#define EMAC_MACADDR_FILTER                   (0x00100000U)

/* Address will be used to match incoming packets */
#define EMAC_MACADDR_MATCH                    (0x00180000U)

/*
** Macros which can be passed as eoiFlag to EMACRxIntAckToClear API
*/
#define EMAC_INT_CORE0_RX                     (0x1U)
#define EMAC_INT_CORE1_RX                     (0x5U)
#define EMAC_INT_CORE2_RX                     (0x9U)

/*
** Macros which can be passed as eoiFlag to EMACTxIntAckToClear API
*/
#define EMAC_INT_CORE0_TX                     (0x2U)
#define EMAC_INT_CORE1_TX                     (0x6U)
#define EMAC_INT_CORE2_TX                     (0xAU)
/* Base Addresses */
#define EMAC_CTRL_RAM_0_BASE      0xFC520000U
#define EMAC_0_BASE               0xFCF78000U
#define EMAC_CTRL_0_BASE          0xFCF78800U
#define MDIO_0_BASE               0xFCF78900U

/*MAC address length*/
#define EMAC_HWADDR_LEN 	      6U
#define MAX_EMAC_INSTANCE 	      1U
#define SIZE_EMAC_CTRL_RAM        0x2000U
#define MAX_TRANSFER_UNIT         1514U
#define MAX_RX_PBUF_ALLOC 		  (10U)
#define MIN_PKT_LEN               60U
#define MIN_PACKET_SIZE          (46U)




#define EMAC_BUF_DESC_OWNER       0x20000000U
#define EMAC_BUF_DESC_SOP         0x80000000U
#define EMAC_BUF_DESC_EOP         0x40000000U
#define EMAC_BUF_DESC_EOQ         0x10000000U

#define EMAC_NETSTATREGS(n)	((uint32)0x200U + (uint32)((n)*4U))

/* Error Signalling Macros */
#define EMAC_ERR_CONNECT		   0x2U /* Not connected.  */
#define EMAC_ERR_OK				   0x1U /* No error, everything OK. */


/* Macros for Configuration Value Registers */
#define EMAC_TXCONTROL_CONFIGVALUE 0x00000001U
#define EMAC_RXCONTROL_CONFIGVALUE 0x00000001U
#define EMAC_TXINTMASKSET_CONFIGVALUE 0x00000001U
#define EMAC_TXINTMASKCLEAR_CONFIGVALUE 0x00000001U
#define EMAC_RXINTMASKSET_CONFIGVALUE 0x00000001U
#define EMAC_RXINTMASKCLEAR_CONFIGVALUE 0x00000001U
#define EMAC_MACSRCADDRHI_CONFIGVALUE ((uint32)((uint32)0xFFU << 24U) | (uint32)((uint32)0xFFU << 16U) | (uint32)((uint32)0xFFU << 8U) | (uint32)((uint32)0xFFU))
#define EMAC_MACSRCADDRLO_CONFIGVALUE ((uint32)((uint32)0xFFU << 8U) | (uint32)((uint32)0xFFU))
#define EMAC_MDIOCONTROL_CONFIGVALUE 0x4114001FU
#define EMAC_C0RXEN_CONFIGVALUE 0x00000001U
#define EMAC_C0TXEN_CONFIGVALUE 0x00000001U

/* Structure to store pending status from the Tx Interrupt Status Registers. */
typedef struct emac_tx_int_status{
	volatile uint32 intstatmasked; /* Pending interrupt status read from the Transmit Interrupt Status (Masked) Register (TXINTSTATMASKED) */
	volatile uint32 intstatraw; /* Pending interrupt status read from the Transmit Interrupt Status (Unmasked) Register (TXINTSTATRAW) */
}emac_tx_int_status_t;

/* Structure to store pending status from the Rx Interrupt Status Registers. */
typedef struct emac_rx_int_status{

	volatile uint32 intstatmasked_pend; /* Reads RXnPEND value from the Receive Interrupt Status (Unmasked) Register (RXINTSTATRAW) */
	volatile uint32 intstatmasked_threshpend; /* Reads RXnTRHESHPEND value from the Receive Interrupt Status (Unmasked) Register (RXINTSTATRAW) */

	volatile uint32 intstatraw_pend; /* Reads RXnPEND value from the Receive Interrupt Status (Unmasked) Register (RXINTSTATRAW) */
	volatile uint32 intstatraw_threshpend; /* Reads RXnTRHESHPEND value from the Receive Interrupt Status (Unmasked) Register (RXINTSTATRAW) */

}emac_rx_int_status_t;

/* EMAC TX Buffer descriptor data structure - Refer TRM for details about the buffer descriptor structure.*/
typedef struct emac_tx_bd {
  volatile struct emac_tx_bd *next;
  volatile uint32 bufptr; /* Pointer to the actual Buffer storing the data to be transmitted. */
  volatile uint32 bufoff_len; /*Buffer Offset and Buffer Length (16 bits each) */
  volatile uint32 flags_pktlen; /*Status flags and Packet Length. (16 bits each)*/
}emac_tx_bd_t;

/* EMAC RX Buffer descriptor data structure - Refer TRM for details about the buffer descriptor structure. */
typedef struct emac_rx_bd {
  volatile struct emac_rx_bd *next; /*Used as a pointer for next element in the linked list of descriptors.*/
  volatile uint32 bufptr; /*Pointer to the actual Buffer which will store the received data.*/
  volatile uint32 bufoff_len; /*Buffer Offset and Buffer Length (16 bits each)*/
  volatile uint32 flags_pktlen; /*Status flags and Packet Length. (16 bits each)*/
}emac_rx_bd_t;

/**
 * Helper struct to hold the data used to operate on a particular
 * receive channel
 */
typedef struct rxch_struct {
  volatile emac_rx_bd_t *free_head; /*Used to point to the free buffer descriptor which can receive new data.*/
  volatile emac_rx_bd_t *active_head; /*Used to point to the active descriptor in the chain which is receiving.*/
  volatile emac_rx_bd_t *active_tail; /*Used to point to the last descriptor in the chain.*/
}rxch_t;

/**
 * Helper struct to hold the data used to operate on a particular
 * transmit channel
 */
typedef struct txch_struct {
  volatile emac_tx_bd_t *free_head; /*Used to point to the free buffer descriptor which can transmit new data.*/
  volatile emac_tx_bd_t *active_tail; /*Used to point to the last descriptor in the chain.*/
  volatile emac_tx_bd_t *next_bd_to_process; /*Used to point to the next descriptor in the chain to be processed.*/
}txch_t;
/**
 * Helper struct to hold private data used to operate the ethernet interface.
 */
typedef struct hdkif_struct {
  /* MAC Address of the Module. */	
  uint8_t mac_addr[6];

  /* emac base address */
  uint32 emac_base;

  /* emac controller base address */
  volatile uint32 emac_ctrl_base;
  volatile uint32 emac_ctrl_ram;

  /* mdio base address */
  volatile uint32 mdio_base;

  /* phy parameters for this instance - for future use */
  uint32 phy_addr;
  boolean (*phy_autoneg)(uint32 param1, uint32 param2, uint16 param3);
  boolean (*phy_partnerability)(uint32 param4, uint32 param5, uint16* param6);

  /* The tx/rx channels for the interface */
  txch_t txchptr;
  rxch_t rxchptr;
}hdkif_t;

/*Ethernet Frame Structure */
typedef struct ethernet_frame
{
	uint8 dest_addr[6]; /* Destination MAC Address */
	uint8 src_addr[6]; /*Source MAC Address. */
	uint16 frame_length; /* Data Frame Length */
	uint8 data[1500]; /* Data */
}ethernet_frame_t;

/* Struct used to take packet data input from the user for transmit APIs. */
typedef struct pbuf_struct {
  /** next pbuf in singly linked pbuf chain */
  struct pbuf_struct *next;

  /**
  * Pointer to the actual ethernet packet/packet fragment to be transmitted.
  * The packet needs to be in the following format:
  * |Destination MAC Address (6 bytes)| Source MAC Address (6 bytes)| Length/Type (2 bytes)| Data (46- 1500 bytes)
  * The data can be split up over multiple pbufs which are linked as a linked list.
  **/
  uint8 *payload;

  /**
   * total length of this buffer and all next buffers in chain
   * belonging to the same packet.
   *
   * For non-queue packet chains this is the invariant:
   * p->tot_len == p->len + (p->next? p->next->tot_len: 0)
   */
  uint16 tot_len;

  /** length of this buffer */
  uint16 len;

}pbuf_t;

/* Structure to hold the values of the EMAC Configuration Registers. */
typedef struct emac_config_reg_struct {
/* EMAC Module Register Values */
uint32 TXCONTROL; /* Transmit Control Register. */
uint32 RXCONTROL; /* Receive Control Register */
uint32 TXINTMASKSET; /* Transmit Interrupt Mask Set Register */
uint32 TXINTMASKCLEAR; /* Transmit Interrupt Clear Register */
uint32 RXINTMASKSET; /* Receive Interrupt Mask Set Register */
uint32 RXINTMASKCLEAR; /*Receive Interrupt Mask Clear Register*/
uint32 MACSRCADDRHI; /*MAC Source Address High Bytes Register*/
uint32 MACSRCADDRLO; /*MAC Source Address Low Bytes Register*/

/*MDIO Module Registers */
uint32 MDIOCONTROL; /*MDIO Control Register. */

/* EMAC Control Module Registers */
uint32 C0RXEN; /*EMAC Control Module Receive Interrupt Enable Register*/
uint32 C0TXEN; /*EMAC Control Module Transmit Interrupt Enable Register*/
}emac_config_reg_t;
/*****************************************************************************/
/** 
 *  @defgroup EMACMDIO EMAC/MDIO
 *  @brief Ethernet Media Access Controller/Management Data Input/Output.
 *  
 *  The EMAC controls the flow of packet data from the system to the PHY. The MDIO module controls PHY
 *  configuration and status monitoring.
 *
 *  Both the EMAC and the MDIO modules interface to the system core through a custom interface that
 *  allows efficient data transmission and reception. This custom interface is referred to as the EMAC control
 *  module and is considered integral to the EMAC/MDIO peripheral
 *
 *	Related Files
 *   - emac.h
 *   - emac.c
 *   - hw_emac.h
 *   - hw_emac_ctrl.h
 *   - hw_mdio.h
 *   - hw_reg_access.h	
 *   - mdio.h
 *   - mdio.c
 *  @addtogroup EMACMDIO
 *  @{
 */
/*
** Prototypes for the APIs
*/
extern uint32 EMACLinkSetup(hdkif_t *hdkif);
extern void EMACInstConfig(hdkif_t *hdkif);
extern void EMACTxIntPulseEnable(uint32 emacBase, uint32 emacCtrlBase,
                                 uint32 ctrlCore, uint32 channel);
extern void EMACTxIntPulseDisable(uint32 emacBase, uint32 emacCtrlBase,
                                  uint32 ctrlCore, uint32 channel);
extern void EMACRxIntPulseEnable(uint32 emacBase, uint32 emacCtrlBase,
                                 uint32 ctrlCore, uint32 channel);
extern void EMACRxIntPulseDisable(uint32 emacBase, uint32 emacCtrlBase,
                                   uint32 ctrlCore, uint32 channel);
extern void EMACRMIISpeedSet(uint32 emacBase, uint32 speed);
extern void EMACDuplexSet(uint32 emacBase, uint32 duplexMode);
extern void EMACTxEnable(uint32 emacBase);
extern void EMACTxDisable(uint32 emacBase);
extern void EMACRxEnable(uint32 emacBase);
extern void EMACRxDisable(uint32 emacBase);
extern void EMACTxHdrDescPtrWrite(uint32 emacBase, uint32 descHdr,
                                  uint32 channel);
extern void EMACRxHdrDescPtrWrite(uint32 emacBase, uint32 descHdr,
                                  uint32 channel);
extern void EMACInit(uint32 emacCtrlBase, uint32 emacBase);
extern void EMACMACSrcAddrSet(uint32 emacBase, uint8 macAddr[6]);
extern void EMACMACAddrSet(uint32 emacBase, uint32 channel,
                           uint8 macAddr[6], uint32 matchFilt);
extern void EMACMIIEnable(uint32 emacBase);
extern void EMACMIIDisable(uint32 emacBase);
extern void EMACRxUnicastSet(uint32 emacBase, uint32 channel);
extern void EMACRxUnicastClear(uint32 emacBase, uint32 channel);
extern void EMACCoreIntAck(uint32 emacBase, uint32 eoiFlag);
extern void EMACTxCPWrite(uint32 emacBase, uint32 channel,
                          uint32 comPtr);
extern void EMACRxCPWrite(uint32 emacBase, uint32 channel,
                          uint32 comPtr);
extern void EMACRxBroadCastEnable(uint32 emacBase, uint32 channel);
extern void EMACRxBroadCastDisable(uint32 emacBase, uint32 channel);
extern void EMACRxMultiCastEnable(uint32 emacBase, uint32 channel);
extern void EMACRxMultiCastDisable(uint32 emacBase, uint32 channel);
extern void EMACNumFreeBufSet(uint32 emacBase, uint32 channel,
                              uint32 nBuf);
extern uint32 EMACIntVectorGet(uint32 emacBase);
uint32 EMACHWInit(uint8_t macaddr[6U]);
void EMACTxTeardown(uint32 emacBase, uint32 channel);
void EMACRxTeardown(uint32 emacBase, uint32 channel);
void EMACFrameSelect(uint32 emacBase, uint64 hashTable);
void EMACTxPrioritySelect(uint32 emacBase, uint32 txPType);
void EMACSoftReset(uint32 emacCtrlBase, uint32 emacBase);
void EMACEnableIdleState(uint32 emacBase);
void EMACDisableIdleState(uint32 emacBase);
void EMACEnableLoopback(uint32 emacBase);
void EMACDisableLoopback(uint32 emacBase);
void EMACTxFlowControlEnable(uint32 emacBase);
void EMACTxFlowControlDisable(uint32 emacBase);
void EMACRxFlowControlEnable(uint32 emacBase);
void EMACRxFlowControlDisable(uint32 emacBase);
void EMACRxSetFlowThreshold(uint32 emacBase, uint32 channel, uint32 threshold);
uint32 EMACReadNetStatRegisters(uint32 emacBase, uint32 statRegNo);
void EMACDMAInit(hdkif_t *hdkif);
boolean EMACTransmit(hdkif_t *hdkif, pbuf_t *pbuf);
void EMACTxIntHandler(hdkif_t *hdkif);
void EMACReceive(hdkif_t *hdkif);
/* Notification Function to which received packets are passed after processing */
void emacTxNotification(hdkif_t *hdkif);
void emacRxNotification(hdkif_t *hdkif);
void EMACTxIntStat(uint32 emacBase, uint32 channel, emac_tx_int_status_t *txintstat);
void EMACRxIntStat(uint32 emacBase, uint32 channel, emac_rx_int_status_t *rxintstat);
void EMACGetConfigValue(emac_config_reg_t *config_reg, config_value_type_t type);

/* USER CODE BEGIN (2) */
/* USER CODE END */

#ifdef __cplusplus
}
#endif

/**@}*/
#endif /* __EMAC_H__ */
