linux/drivers/net/arcnet/com90xx.c

/*
 * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)
 *
 * Written 1994-1999 by Avery Pennarun.
 * Written 1999 by Martin Mares <[email protected]>.
 * 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 of skeleton.c 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.
 *
 * **********************
 *
 * For more details, see drivers/net/arcnet.c
 *
 * **********************
 */

#define pr_fmt(fmt) …

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/slab.h>
#include <linux/io.h>

#include "arcdevice.h"
#include "com9026.h"

/* Define this to speed up the autoprobe by assuming if only one io port and
 * shmem are left in the list at Stage 5, they must correspond to each
 * other.
 *
 * This is undefined by default because it might not always be true, and the
 * extra check makes the autoprobe even more careful.  Speed demons can turn
 * it on - I think it should be fine if you only have one ARCnet card
 * installed.
 *
 * If no ARCnet cards are installed, this delay never happens anyway and thus
 * the option has no effect.
 */
#undef FAST_PROBE

/* Internal function declarations */
static int com90xx_found(int ioaddr, int airq, u_long shmem, void __iomem *);
static void com90xx_command(struct net_device *dev, int command);
static int com90xx_status(struct net_device *dev);
static void com90xx_setmask(struct net_device *dev, int mask);
static int com90xx_reset(struct net_device *dev, int really_reset);
static void com90xx_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count);
static void com90xx_copy_from_card(struct net_device *dev, int bufnum,
				   int offset, void *buf, int count);

/* Known ARCnet cards */

static struct net_device *cards[16];
static int numcards;

/* Handy defines for ARCnet specific stuff */

/* The number of low I/O ports used by the card */
#define ARCNET_TOTAL_SIZE …

/* Amount of I/O memory used by the card */
#define BUFFER_SIZE …
#define MIRROR_SIZE …

static int com90xx_skip_probe __initdata = …;

/* Module parameters */

static int io;			/* use the insmod io= irq= shmem= options */
static int irq;
static int shmem;
static char device[9];		/* use eg. device=arc1 to change name */

module_param_hw(io, int, ioport, 0);
module_param_hw(irq, int, irq, 0);
module_param(shmem, int, 0);
module_param_string(…);

static void __init com90xx_probe(void)
{ … }

static int __init check_mirror(unsigned long addr, size_t size)
{ … }

/* Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init com90xx_found(int ioaddr, int airq, u_long shmem,
				void __iomem *p)
{ … }

static void com90xx_command(struct net_device *dev, int cmd)
{ … }

static int com90xx_status(struct net_device *dev)
{ … }

static void com90xx_setmask(struct net_device *dev, int mask)
{ … }

/* Do a hardware reset on the card, and set up necessary registers.
 *
 * This should be called as little as possible, because it disrupts the
 * token on the network (causes a RECON) and requires a significant delay.
 *
 * However, it does make sure the card is in a defined state.
 */
static int com90xx_reset(struct net_device *dev, int really_reset)
{ … }

static void com90xx_copy_to_card(struct net_device *dev, int bufnum,
				 int offset, void *buf, int count)
{ … }

static void com90xx_copy_from_card(struct net_device *dev, int bufnum,
				   int offset, void *buf, int count)
{ … }

MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;

static int __init com90xx_init(void)
{ … }

static void __exit com90xx_exit(void)
{ … }

module_init(…) …;
module_exit(com90xx_exit);

#ifndef MODULE
static int __init com90xx_setup(char *s)
{ … }

__setup(…);
#endif