#ifndef __ETHERNETIF_H
#define __ETHERNETIF_H

#include "lwip/err.h"
#include "lwip/netif.h"

void phy_write_reg(uint8_t reg_add, uint16_t reg_val);
uint16_t phy_read_reg(uint8_t reg_add);

#define ROM_CFG_USERADR_ID 0x1FFFF7E8

#define ETH_DMARxDesc_FrameLengthShift 16

#define ETH_MAX_PACKET_SIZE \
  1536 /* ETH_HEADER + VLAN_TAG + MAX_ETH_PAYLOAD + ETH_CRC */
#define ETH_HEADER                                                           \
  14                /* 6 byte Dest addr, 6 byte Src addr, 2 byte length/type \
                     */
#define ETH_CRC 4   /* Ethernet CRC */
#define ETH_EXTRA 2 /* Extra bytes in some cases */
#define VLAN_TAG 4  /* optional 802.1q VLAN Tag */
#define MIN_ETH_PAYLOAD 46   /* Minimum Ethernet payload size */
#define MAX_ETH_PAYLOAD 1500 /* Maximum Ethernet payload size */
#define MIN_ETH_FRAME_SIZE (ETH_HEADER + MIN_ETH_PAYLOAD) /* 60 bytes */

typedef struct {
  uint32_t volatile Status;     /* Status */
  uint32_t ControlBufferSize;   /* Control and Buffer1, Buffer2 lengths */
  uint32_t Buffer1Addr;         /* Buffer1 address pointer */
  uint32_t Buffer2NextDescAddr; /* Buffer2 or next descriptor address pointer */
} ETH_DMADESCTypeDef;

/**
 * @brief Initialize the ethernet interface and lwIP network stack.
 *        This function should be passed as the init function to netif_add().
 *
 * @param netif The lwIP network interface structure to be initialized.
 * @return ERR_OK if the loopif is initialized, ERR_MEM if private data couldn't
 * be allocated.
 */
err_t ethernetif_init(struct netif* netif);

/**
 * @brief This function should be called periodically from your main loop
 *        to check for incoming packets and pass them to lwIP.
 *
 * @param netif The lwIP network interface structure.
 */
void ethernetif_input(struct netif* netif);

/**
 * @brief This function should be called periodically from your main loop
 *        to check the link status and update lwIP accordingly.
 *
 * @param netif The lwIP network interface structure..
 */
void ethernetif_link_poll(struct netif* netif);

#endif /* __ETHERNETIF_H */