linux-imx

/*

 * Linux ARCnet driver - COM90xx chipset (memory-mapped buffers)

 *

 * Written 1994-1999 by Avery Pennarun.

 * Written 1999 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 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) "arcnet:" KBUILD_MODNAME ": " 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   16

​

/* Amount of I/O memory used by the card */

#define BUFFER_SIZE (512)

#define MIRROR_SIZE (BUFFER_SIZE * 4)

​

static int com90xx_skip_probe __initdata = 0;

​

/* 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);