nes-proj/cpu/6502/net/ethernet.c

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/*
* 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>
*
*/
#include <modload.h>
#include "contiki-net.h"
#include "cfs/cfs.h"
#include "sys/log.h"
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#include "lib/error.h"
#include "net/ethernet-drv.h"
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#include "net/ethernet.h"
struct {
char signature[4];
struct uip_eth_addr ethernet_address;
uint8_t *buffer;
uint16_t buffer_size;
char jmp_init;
char __fastcall__ (* init)(uint16_t reg);
char jmp_poll;
uint16_t (* poll)(void);
char jmp_send;
void __fastcall__ (* send)(uint16_t len);
char jmp_exit;
void (* exit)(void);
} *module;
/*---------------------------------------------------------------------------*/
void
ethernet_init(struct ethernet_config *config)
{
static const char signature[4] = {0x65, 0x74, 0x68, 0x01};
#ifndef ETHERNET
struct mod_ctrl module_control = {cfs_read};
uint8_t byte;
module_control.callerdata = cfs_open(config->name, CFS_READ);
if(module_control.callerdata < 0) {
log_message(config->name, ": File not found");
error_exit();
}
byte = mod_load(&module_control);
if(byte != MLOAD_OK) {
log_message(config->name, byte == MLOAD_ERR_MEM? ": Out of memory":
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": No module");
error_exit();
}
cfs_close(module_control.callerdata);
module = module_control.module;
for(byte = 0; byte < 4; ++byte) {
if(module->signature[byte] != signature[byte]) {
log_message(config->name, ": No ETH driver");
error_exit();
}
}
#else /* !ETHERNET */
extern void ETHERNET;
module = &ETHERNET;
#endif /* !ETHERNET */
module->buffer = uip_buf;
module->buffer_size = UIP_BUFSIZE;
if(module->init(config->addr)) {
log_message(config->name, ": No hardware");
error_exit();
}
uip_setethaddr(module->ethernet_address);
}
/*---------------------------------------------------------------------------*/
uint16_t
ethernet_poll(void)
{
return module->poll();
}
/*---------------------------------------------------------------------------*/
void
ethernet_send(void)
{
module->send(uip_len);
}
/*---------------------------------------------------------------------------*/
void
ethernet_exit(void)
{
module->exit();
#ifndef ETHERNET
mod_free(module);
#endif /* !ETHERNET */
}
/*---------------------------------------------------------------------------*/