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/* -*- c -*- */
/*
* Copyright 2007 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INCLUDED_ETHERNET_H
#define INCLUDED_ETHERNET_H
#include "network.h"
#include <stdbool.h>
typedef void (*ethernet_link_changed_callback_t)(int speed);
/*!
* \brief one time call to initialize ethernet
*/
void ethernet_init(void);
/*!
* \brief Specify the function to call on link state changes.
*
* When the link comes up, speed is the link speed in Mbit/s.
* When the link goes down, speed is 0.
*/
void ethernet_register_link_changed_callback(ethernet_link_changed_callback_t cb);
/*!
* \returns ethernet MAC address
*/
const eth_mac_addr_t *ethernet_mac_addr(void);
/*!
* \brief write mac address to eeprom and begin using it
*/
bool ethernet_set_mac_addr(const eth_mac_addr_t *t);
/*
* \brief read RMON regs and return error mask
*/
int ethernet_check_errors(void);
#define RME_RX_CRC 0x0001
#define RME_RX_FIFO_FULL 0x0002
#define RME_RX_2SHORT_2LONG 0x0004
#define RME_TX_JAM_DROP 0x0010
#define RME_TX_FIFO_UNDER 0x0020
#define RME_TX_FIFO_OVER 0x0040
typedef enum { LS_UNKNOWN, LS_DOWN, LS_UP } eth_link_state_t;
// flow control bitmasks
#define FC_NONE 0x0
#define FC_WE_TX 0x1 // we send PAUSE frames
#define FC_WE_RX 0x2 // we honor received PAUSE frames
#define FC_SYMM (FC_WE_TX | FC_WE_RX)
#define S_UNKNOWN (-1) // unknown link speed
typedef struct {
eth_link_state_t link_state;
int link_speed; // in Mb/s
int flow_control;
} ethernet_t;
#endif /* INCLUDED_ETHERNET_H */
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