path: root/drivers/net/ethernet/8390/wd.c

/* wd.c: A WD80x3 ethernet driver for linux. */
/*
	Written 1993-94 by Donald Becker.

	Copyright 1993 United States Government as represented by the
	Director, National Security Agency.

	This software may be used and distributed according to the terms
	of the GNU General Public License, incorporated herein by reference.

	The author may be reached as becker@scyld.com, or C/O
	Scyld Computing Corporation
	410 Severn Ave., Suite 210
	Annapolis MD 21403

	This is a driver for WD8003 and WD8013 "compatible" ethercards.

	Thanks to Russ Nelson (nelson@crnwyr.com) for loaning me a WD8013.

	Changelog:

	Paul Gortmaker	: multiple card support for module users, support
			  for non-standard memory sizes.


*/

static const char version[] =
	"wd.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>

#include <asm/io.h>

#include "8390.h"

#define DRV_NAME "wd"

/* A zero-terminated list of I/O addresses to be probed. */
static unsigned int wd_portlist[] __initdata =
{0x300, 0x280, 0x380, 0x240, 0};

static int wd_probe1(struct net_device *dev, int ioaddr);

static int wd_open(struct net_device *dev);
static void wd_reset_8390(struct net_device *dev);
static void wd_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
						int ring_page);
static void wd_block_input(struct net_device *dev, int count,
						  struct sk_buff *skb, int ring_offset);
static void wd_block_output(struct net_device *dev, int count,
							const unsigned char *buf, int start_page);
static int wd_close(struct net_device *dev);

static u32 wd_msg_enable;

#define WD_START_PG		0x00	/* First page of TX buffer */
#define WD03_STOP_PG	0x20	/* Last page +1 of RX ring */
#define WD13_STOP_PG	0x40	/* Last page +1 of RX ring */

#define WD_CMDREG		0		/* Offset to ASIC command register. */
#define	 WD_RESET		0x80	/* Board reset, in WD_CMDREG. */
#define	 WD_MEMENB		0x40	/* Enable the shared memory. */
#define WD_CMDREG5		5		/* Offset to 16-bit-only ASIC register 5. */
#define	 ISA16			0x80	/* Enable 16 bit access from the ISA bus. */
#define	 NIC16			0x40	/* Enable 16 bit access from the 8390. */
#define WD_NIC_OFFSET	16		/* Offset to the 8390 from the base_addr. */
#define WD_IO_EXTENT	32


/*	Probe for the WD8003 and WD8013.  These cards have the station
	address PROM at I/O ports <base>+8 to <base>+13, with a checksum
	following. A Soundblaster can have the same checksum as an WDethercard,
	so we have an extra exclusionary check for it.

	The wd_probe1() routine initializes the card and fills the
	station address field. */

static int __init do_wd_probe(struct net_device *dev)
{
	int i;
	struct resource *r;
	int base_addr = dev->base_addr;
	int irq = dev->irq;
	int mem_start = dev->mem_start;
	int mem_end = dev->mem_end;

	if (base_addr > 0x1ff) {	/* Check a user specified location. */
		r = request_region(base_addr, WD_IO_EXTENT, "wd-probe");
		if ( r == NULL)
			return -EBUSY;
		i = wd_probe1(dev, base_addr);
		if (i != 0)
			release_region(base_addr, WD_IO_EXTENT);
		else
			r->name = dev->name;
		return i;
	}
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

	for (i = 0; wd_portlist[i]; i++) {
		int ioaddr = wd_portlist[i];
		r = request_region(ioaddr, WD_IO_EXTENT, "wd-probe");
		if (r == NULL)
			continue;
		if (wd_probe1(dev, ioaddr) == 0) {
			r->name = dev->name;
			return 0;
		}
		release_region(ioaddr, WD_IO_EXTENT);
		dev->irq = irq;
		dev->mem_start = mem_start;
		dev->mem_end = mem_end;
	}

	return -ENODEV;
}

#ifndef MODULE
struct net_device * __init wd_probe(int unit)
{
	struct net_device *dev = alloc_ei_netdev();
	int err;

	if (!dev)
		return ERR_PTR(-ENOMEM);

	sprintf(dev->name, "eth%d", unit);
	netdev_boot_setup_check(dev);

	err = do_wd_probe(dev);
	if (err)
		goto out;
	return dev;
out:
	free_netdev(dev);
	return ERR_PTR(err);
}
#endif

static const struct net_device_ops wd_netdev_ops = {
	.ndo_open		= wd_open,
	.ndo_stop		= wd_close,
	.ndo_start_xmit		= ei_start_xmit,
	.ndo_tx_timeout		= ei_tx_timeout,
	.ndo_get_stats		= ei_get_stats,
	.ndo_set_rx_mode	= ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_set_mac_address 	= eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller 	= ei_poll,
#endif
};

static int __init wd_probe1(struct net_device *dev, int ioaddr)
{
	int i;
	int err;
	int checksum = 0;
	int ancient = 0;			/* An old card without config registers. */
	int word16 = 0;				/* 0 = 8 bit, 1 = 16 bit */
	const char *model_name;
	static unsigned version_printed;
	struct ei_device *ei_local = netdev_priv(dev);

	for (i = 0; i < 8; i++)
		checksum += inb(ioaddr + 8 + i);
	if (inb(ioaddr + 8) == 0xff 	/* Extra check to avoid soundcard. */
		|| inb(ioaddr + 9) == 0xff
		|| (checksum & 0xff) != 0xFF)
		return -ENODEV;

	/* Check for semi-valid mem_start/end values if supplied. */
	if ((dev->mem_start % 0x2000) || (dev->mem_end % 0x2000)) {
		netdev_warn(dev,
			    "wd.c: user supplied mem_start or mem_end not on 8kB boundary - ignored.\n");
		dev->mem_start = 0;
		dev->mem_end = 0;
	}

	if ((wd_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
		netdev_info(dev, version);

	for (i = 0; i < 6; i++)
		dev->dev_addr[i] = inb(ioaddr + 8 + i);

	netdev_info(dev, "WD80x3 at %#3x, %pM", ioaddr, dev->dev_addr);

	/* The following PureData probe code was contributed by
	   Mike Jagdis <jaggy@purplet.demon.co.uk>. Puredata does software
	   configuration differently from others so we have to check for them.
	   This detects an 8 bit, 16 bit or dumb (Toshiba, jumpered) card.
	   */
	if (inb(ioaddr+0) == 'P' && inb(ioaddr+1) == 'D') {
		unsigned char reg5 = inb(ioaddr+5);

		switch (inb(ioaddr+2)) {
		case 0x03: word16 = 0; model_name = "PDI8023-8";	break;
		case 0x05: word16 = 0; model_name = "PDUC8023";	break;
		case 0x0a: word16 = 1; model_name = "PDI8023-16"; break;
			/* Either 0x01 (dumb) or they've released a new version. */
		default:	 word16 = 0; model_name = "PDI8023";	break;
		}
		dev->mem_start = ((reg5 & 0x1c) + 0xc0) << 12;
		dev->irq = (reg5 & 0xe0) == 0xe0 ?