Contiki 2.6
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00001 /* 00002 * Copyright (c) 2007, Swedish Institute of Computer Science 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. Neither the name of the Institute nor the names of its contributors 00014 * may be used to endorse or promote products derived from this software 00015 * without specific prior written permission. 00016 * 00017 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00018 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00019 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00020 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00021 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00022 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00023 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00024 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00025 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00026 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00027 * SUCH DAMAGE. 00028 * 00029 * This file is part of the Contiki operating system. 00030 * 00031 * Author: Oliver Schmidt <ol.sc@web.de> 00032 * 00033 * @(#)$Id: ethernet.c,v 1.7 2010/09/28 23:02:16 oliverschmidt Exp $ 00034 */ 00035 00036 #include <modload.h> 00037 00038 #include "contiki-net.h" 00039 #include "cfs/cfs.h" 00040 #include "sys/log.h" 00041 #include "lib/error.h" 00042 #include "net/ethernet-drv.h" 00043 00044 #include "net/ethernet.h" 00045 00046 struct { 00047 char signature[4]; 00048 struct uip_eth_addr ethernet_address; 00049 uint8_t *buffer; 00050 uint16_t buffer_size; 00051 void __fastcall__ (* init)(uint16_t reg); 00052 uint16_t (* poll)(void); 00053 void __fastcall__ (* send)(uint16_t len); 00054 void (* exit)(void); 00055 } *module; 00056 00057 /*---------------------------------------------------------------------------*/ 00058 void CC_FASTCALL 00059 ethernet_init(struct ethernet_config *config) 00060 { 00061 static const char signature[4] = {0x65, 0x74, 0x68, 0x01}; 00062 00063 #ifndef ETHERNET 00064 00065 struct mod_ctrl module_control = {cfs_read}; 00066 uint8_t byte; 00067 00068 module_control.callerdata = cfs_open(config->name, CFS_READ); 00069 if(module_control.callerdata < 0) { 00070 log_message(config->name, ": File not found"); 00071 error_exit(); 00072 } 00073 00074 byte = mod_load(&module_control); 00075 if(byte != MLOAD_OK) { 00076 log_message(config->name, byte == MLOAD_ERR_MEM? ": Out of memory": 00077 ": No module"); 00078 error_exit(); 00079 } 00080 00081 cfs_close(module_control.callerdata); 00082 module = module_control.module; 00083 00084 for(byte = 0; byte < 4; ++byte) { 00085 if(module->signature[byte] != signature[byte]) { 00086 log_message(config->name, ": No ETH driver"); 00087 error_exit(); 00088 } 00089 } 00090 00091 #else /* !ETHERNET */ 00092 00093 extern void ETHERNET; 00094 00095 module = ÐERNET; 00096 00097 #endif /* !ETHERNET */ 00098 00099 module->buffer = uip_buf; 00100 module->buffer_size = UIP_BUFSIZE; 00101 module->init(config->addr); 00102 00103 uip_setethaddr(module->ethernet_address); 00104 } 00105 /*---------------------------------------------------------------------------*/ 00106 uint16_t 00107 ethernet_poll(void) 00108 { 00109 return module->poll(); 00110 } 00111 /*---------------------------------------------------------------------------*/ 00112 void 00113 ethernet_send(void) 00114 { 00115 module->send(uip_len); 00116 } 00117 /*---------------------------------------------------------------------------*/ 00118 void 00119 ethernet_exit(void) 00120 { 00121 module->exit(); 00122 00123 #ifndef ETHERNET 00124 mod_free(module); 00125 #endif /* !ETHERNET */ 00126 } 00127 /*---------------------------------------------------------------------------*/