nes-proj/cpu/6502/net/ethernet.c
2007-11-22 11:41:18 +00:00

129 lines
4.0 KiB
C

/*
* Copyright (c) 2007, Swedish Institute of Computer Science
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* Author: Oliver Schmidt <ol.sc@web.de>
*
* @(#)$Id: ethernet.c,v 1.2 2007/11/22 11:41:18 oliverschmidt Exp $
*/
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <modload.h>
#include "contiki-net.h"
#include "ethernet-drv.h"
#include "ethernet.h"
struct {
char signature[4];
struct uip_eth_addr ethernet_address;
u8_t *buffer;
u16_t buffer_size;
void __fastcall__ (* init)(u16_t reg);
u16_t (* poll)(void);
void __fastcall__ (* send)(u16_t len);
void (* exit)(void);
} *module;
/*---------------------------------------------------------------------------*/
static void
error_exit(void)
{
fprintf(stderr, "Press any key to continue ...\n");
getchar();
exit(EXIT_FAILURE);
}
/*---------------------------------------------------------------------------*/
void
ethernet_init(struct ethernet_config *config)
{
static const char signature[4] = {0x65, 0x74, 0x68, 0x01};
struct mod_ctrl module_control = {read};
u8_t byte;
module_control.callerdata = open(config->name, O_RDONLY);
if(module_control.callerdata < 0) {
fprintf(stderr, "%s: %s\n", config->name, strerror(errno));
error_exit();
}
byte = mod_load(&module_control);
if(byte != MLOAD_OK) {
if(byte == MLOAD_ERR_MEM) {
fprintf(stderr, "%s: %s\n", config->name, strerror(ENOMEM));
} else {
fprintf(stderr, "%s: %s %d\n", config->name, "Error", byte);
}
error_exit();
}
close(module_control.callerdata);
module = module_control.module;
for(byte = 0; byte < 4; byte++) {
if(module->signature[byte] != signature[byte]) {
fprintf(stderr, "%s: %s\n", config->name, "No ETH Driver");
error_exit();
}
}
module->buffer = uip_buf;
module->buffer_size = UIP_BUFSIZE;
module->init(config->addr);
uip_setethaddr(module->ethernet_address);
}
/*---------------------------------------------------------------------------*/
u16_t
ethernet_poll(void)
{
return module->poll();
}
/*---------------------------------------------------------------------------*/
void
ethernet_send(void)
{
module->send(uip_len);
}
/*---------------------------------------------------------------------------*/
void
ethernet_exit(void)
{
module->exit();
mod_free(module);
}
/*---------------------------------------------------------------------------*/