/*
* Linux ARCnet driver - device-independent routines
*
* Written 1997 by David Woodhouse.
* Written 1994-1999 by Avery Pennarun.
* Written 1999-2000 by Martin Mares <mj@ucw.cz>.
* Derived from skeleton.c by Donald Becker.
*
* Special thanks to Contemporary Controls, Inc. (www.ccontrols.com)
* for sponsoring the further development of this driver.
*
* **********************
*
* The original copyright was as follows:
*
* skeleton.c Written 1993 by Donald Becker.
* Copyright 1993 United States Government as represented by the
* Director, National Security Agency. This software may only be used
* and distributed according to the terms of the GNU General Public License as
* modified by SRC, incorporated herein by reference.
*
* **********************
*
* The change log is now in a file called ChangeLog in this directory.
*
* Sources:
* - Crynwr arcnet.com/arcether.com packet drivers.
* - arcnet.c v0.00 dated 1/1/94 and apparently by
* Donald Becker - it didn't work :)
* - skeleton.c v0.05 dated 11/16/93 by Donald Becker
* (from Linux Kernel 1.1.45)
* - RFC's 1201 and 1051 - re: TCP/IP over ARCnet
* - The official ARCnet COM9026 data sheets (!) thanks to
* Ken Cornetet <kcornete@nyx10.cs.du.edu>
* - The official ARCnet COM20020 data sheets.
* - Information on some more obscure ARCnet controller chips, thanks
* to the nice people at SMSC.
* - net/inet/eth.c (from kernel 1.1.50) for header-building info.
* - Alternate Linux ARCnet source by V.Shergin <vsher@sao.stavropol.su>
* - Textual information and more alternate source from Joachim Koenig
* <jojo@repas.de>
*/
#define VERSION "arcnet: v3.94 BETA 2007/02/08 - by Avery Pennarun et al.\n"
#include <linux/module.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <net/arp.h>
#include <linux/init.h>
#include <linux/arcdevice.h>
#include <linux/jiffies.h>
/* "do nothing" functions for protocol drivers */
static void null_rx(struct net_device *dev, int bufnum,
struct archdr *pkthdr, int length);
static int null_build_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, uint8_t daddr);
static int null_prepare_tx(struct net_device *dev, struct archdr *pkt,
int length, int bufnum);
static void arcnet_rx(struct net_device *dev, int bufnum);
/*
* one ArcProto per possible proto ID. None of the elements of
* arc_proto_map are allowed to be NULL; they will get set to
* arc_proto_default instead. It also must not be NULL; if you would like
* to set it to NULL, set it to &arc_proto_null instead.
*/
struct ArcProto *arc_proto_map[256], *arc_proto_default,
*arc_bcast_proto, *arc_raw_proto;
static struct ArcProto arc_proto_null =
{
.suffix = '?',
.mtu = XMTU,
.is_ip = 0,
.rx = null_rx,
.build_header = null_build_header,
.prepare_tx = null_prepare_tx,
.continue_tx = NULL,
.ack_tx = NULL
};
/* Exported function prototypes */
int arcnet_debug = ARCNET_DEBUG;
EXPORT_SYMBOL(arc_proto_map);
EXPORT_SYMBOL(arc_proto_default);
EXPORT_SYMBOL(arc_bcast_proto);
EXPORT_SYMBOL(arc_raw_proto);
EXPORT_SYMBOL(arcnet_unregister_proto);
EXPORT_SYMBOL(arcnet_debug);
EXPORT_SYMBOL(alloc_arcdev);
EXPORT_SYMBOL(arcnet_interrupt);
/* Internal function prototypes */
static int arcnet_open(struct net_device *dev);
static int arcnet_close(struct net_device *dev);
static int arcnet_send_packet(struct sk_buff *skb, struct net_device *dev);
static void arcnet_timeout(struct net_device *dev);
static int arcnet_header(struct sk_buff *skb, struct net_device *dev,
unsigned short type, const void *daddr,
const void *saddr, unsigned len);
static int arcnet_rebuild_header(struct sk_buff *skb);
static struct net_device_stats *arcnet_get_stats(struct net_device *dev);
static int go_tx(struct net_device *dev);
static int debug = ARCNET_DEBUG;
module_param(debug, int, 0);
MODULE_LICENSE("GPL");
static int __init arcnet_init(void)
{
int count;
arcnet_debug = debug;
printk("arcnet loaded.\n");
#ifdef ALPHA_WARNING
BUGLVL(D_EXTRA) {
printk("arcnet: ***\n"
"arcnet: * Read arcnet.txt for important release notes!\n"
"arcnet: *\n"
"arcnet: * This is an ALPHA version! (Last stable release: v3.02) E-mail\n"
"arcnet: * me if you have any questions, comments, or bug reports.\n"
"arcnet: ***\n");
}
#endif
/* initialize the protocol map */
arc_raw_proto = arc_proto_default = arc_bcast_proto = &