Generic Ethernet driver for cc65 targets. The actual hardware driver is loaded as relocatable module.

2007-11-20 21:10:20 +00:00 · 2007-11-20 21:10:20 +00:00 · da44474fd4
commit da44474fd4
parent d474777ff8
5 changed files with 330 additions and 2 deletions
--- a/cpu/6502/net/ethernet.c
+++ b/cpu/6502/net/ethernet.c
@ -0,0 +1,128 @@
+/*
+ * 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 1.1 2007/11/20 21:10:21 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 == -1) {
+    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);
+}
+/*---------------------------------------------------------------------------*/