linux-imx

/*

 * 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 pr_fmt(fmt) KBUILD_MODNAME ": " fmt

​

#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/jiffies.h>

#include <linux/errqueue.h>

​

#include <linux/leds.h>

​

#include "arcdevice.h"

#include "com9026.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];

EXPORT_SYMBOL(arc_proto_map);

​

struct ArcProto *arc_proto_default;

EXPORT_SYMBOL(arc_proto_default);

​

struct ArcProto *arc_bcast_proto;

EXPORT_SYMBOL(arc_bcast_proto);

​

struct ArcProto *arc_raw_proto;

EXPORT_SYMBOL(arc_raw_proto);

​

static struct ArcProto arc_proto_null = {

    .suffix     = '?',

    .mtu        = XMTU,

    .is_ip          = 0,

    .rx     = null_rx,