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116 lines
3.7 KiB
C
116 lines
3.7 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Oliver Schmidt <ol.sc@web.de>
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*
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* @(#)$Id: ethernet.c,v 1.5 2007/12/21 01:13:44 oliverschmidt Exp $
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*/
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#include <fcntl.h>
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#include <unistd.h>
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#include <modload.h>
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#include "contiki-net.h"
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#include "sys/log.h"
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#include "lib/error.h"
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#include "net/ethernet-drv.h"
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#include "net/ethernet.h"
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struct {
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char signature[4];
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struct uip_eth_addr ethernet_address;
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u8_t *buffer;
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u16_t buffer_size;
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void __fastcall__ (* init)(u16_t reg);
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u16_t (* poll)(void);
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void __fastcall__ (* send)(u16_t len);
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void (* exit)(void);
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} *module;
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/*---------------------------------------------------------------------------*/
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void CC_FASTCALL
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ethernet_init(struct ethernet_config *config)
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{
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static const char signature[4] = {0x65, 0x74, 0x68, 0x01};
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struct mod_ctrl module_control = {read};
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u8_t byte;
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module_control.callerdata = open(config->name, O_RDONLY);
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if(module_control.callerdata < 0) {
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log_message(config->name, ": File not found");
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error_exit();
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}
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byte = mod_load(&module_control);
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if(byte != MLOAD_OK) {
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log_message(config->name, byte == MLOAD_ERR_MEM? ": Out of memory":
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": No module");
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error_exit();
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}
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close(module_control.callerdata);
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module = module_control.module;
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for(byte = 0; byte < 4; ++byte) {
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if(module->signature[byte] != signature[byte]) {
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log_message(config->name, ": No ETH driver");
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error_exit();
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}
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}
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module->buffer = uip_buf;
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module->buffer_size = UIP_BUFSIZE;
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module->init(config->addr);
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uip_setethaddr(module->ethernet_address);
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}
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/*---------------------------------------------------------------------------*/
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u16_t
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ethernet_poll(void)
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{
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return module->poll();
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}
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/*---------------------------------------------------------------------------*/
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void
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ethernet_send(void)
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{
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module->send(uip_len);
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}
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/*---------------------------------------------------------------------------*/
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void
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ethernet_exit(void)
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{
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module->exit();
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mod_free(module);
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}
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/*---------------------------------------------------------------------------*/
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