Updated LAN driver

- changed directory layout
- Multicast support (automatic RX filter adjustment)
- MC68000 target in Makefile
- clarified licensing (GPLv3)
- README files

Driver/baxnet/source/sdnet/enc28j60.h

@@ -0,0 +1,71 @@
+/*
+ * enc28j60.h - Microchip ENC28J60 interface
+ *
+ * Written by
+ *  Henryk Richter <henryk.richter@gmx.net>
+ * 
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ *  02111-1307  USA.
+ *
+ */
+
+#ifndef _INC_ENC28J60_H
+#define _INC_ENC28J60_H
+
+/* result values */
+#define PIO_OK            0
+#define PIO_NOT_FOUND     1
+#define PIO_TOO_LARGE     2
+#define PIO_IO_ERR        3
+
+/* init flags */
+#define PIO_INIT_FULL_DUPLEX    1
+#define PIO_INIT_LOOP_BACK      2
+#define PIO_INIT_BROAD_CAST     4
+#define PIO_INIT_FLOW_CONTROL   8
+#define PIO_INIT_MULTI_CAST     16
+#define PIO_INIT_PROMISC        32
+
+/* status flags */
+#define PIO_STATUS_VERSION      0
+#define PIO_STATUS_LINK_UP      1 
+
+/* control ids */
+#define PIO_CONTROL_FLOW        0
+
+/* sigh, old gcc does not have stdint.h */
+typedef unsigned char u08;
+typedef unsigned short u16;
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+
+/* API functions */
+u08 enc28j60_init(const u08 macaddr[6], u08 flags);
+void enc28j60_exit(void);
+u08 enc28j60_setOnline( void );
+u08 enc28j60_setOffline( void );
+void enc28j60_SetSPISpeed( unsigned long clock_divider );
+
+u08 enc28j60_send(const u08 *data, u16 size);
+u08 enc28j60_recv(u08 *data, u16 max_size, u16 *got_size);
+u08 enc28j60_status( u08 status_id,  u08 *value);
+u08 enc28j60_has_recv(void);
+void enc28j60_setMAC( const u08 macaddr[6] );
+void enc28j60_getMAC( u08 macaddr[6] ); /* mainly for debug */
+void enc28j60_dump_regs(void);
+void enc28j60_broadcast_multicast_filter( u08 flags  );
+
+#endif /* _INC_ENC28J60_H */