linux/drivers/net/arcnet/com90io.c

/*
 * Linux ARCnet driver - COM90xx chipset (IO-mapped buffers)
 *
 * Written 1997 by David Woodhouse.
 * Written 1994-1999 by Avery Pennarun.
 * Written 1999-2000 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/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/memblock.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>

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

/* Internal function declarations */

static int com90io_found(struct net_device *dev);
static void com90io_command(struct net_device *dev, int command);
static int com90io_status(struct net_device *dev);
static void com90io_setmask(struct net_device *dev, int mask);
static int com90io_reset(struct net_device *dev, int really_reset);
static void com90io_copy_to_card(struct net_device *dev, int bufnum, int offset,
				 void *buf, int count);
static void com90io_copy_from_card(struct net_device *dev, int bufnum,
				   int offset, void *buf, int count);

/* Handy defines for ARCnet specific stuff */

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

/****************************************************************************
 *                                                                          *
 * IO-mapped operation routines                                             *
 *                                                                          *
 ****************************************************************************/

#undef ONE_AT_A_TIME_TX
#undef ONE_AT_A_TIME_RX

static u_char get_buffer_byte(struct net_device *dev, unsigned offset)
{ … }

#ifdef ONE_AT_A_TIME_TX
static void put_buffer_byte(struct net_device *dev, unsigned offset,
			    u_char datum)
{
	int ioaddr = dev->base_addr;

	arcnet_outb(offset >> 8, ioaddr, COM9026_REG_W_ADDR_HI);
	arcnet_outb(offset & 0xff, ioaddr, COM9026_REG_W_ADDR_LO);

	arcnet_outb(datum, ioaddr, COM9026_REG_RW_MEMDATA);
}

#endif

static void get_whole_buffer(struct net_device *dev, unsigned offset,
			     unsigned length, char *dest)
{ … }

static void put_whole_buffer(struct net_device *dev, unsigned offset,
			     unsigned length, char *dest)
{ … }

/* We cannot probe for an IO mapped card either, although we can check that
 * it's where we were told it was, and even autoirq
 */
static int __init com90io_probe(struct net_device *dev)
{ … }

/* Set up the struct net_device associated with this card.  Called after
 * probing succeeds.
 */
static int __init com90io_found(struct net_device *dev)
{ … }

/* 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 com90io_reset(struct net_device *dev, int really_reset)
{ … }

static void com90io_command(struct net_device *dev, int cmd)
{ … }

static int com90io_status(struct net_device *dev)
{ … }

static void com90io_setmask(struct net_device *dev, int mask)
{ … }

static void com90io_copy_to_card(struct net_device *dev, int bufnum,
				 int offset, void *buf, int count)
{ … }

static void com90io_copy_from_card(struct net_device *dev, int bufnum,
				   int offset, void *buf, int count)
{ … }

static int io;			/* use the insmod io= irq= shmem= options */
static int irq;
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_string(…);
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;

#ifndef MODULE
static int __init com90io_setup(char *s)
{ … }
__setup(…);
#endif

static struct net_device *my_dev;

static int __init com90io_init(void)
{ … }

static void __exit com90io_exit(void)
{ … }

module_init(…) …
module_exit(…)