i825xx: Move the Intel 82586/82593/82596 based drivers

Move the drivers that use the i82586/i82593/i82596 chipsets into
drivers/net/ethernet/i825xx/ and make the necessary Kconfig and
Makefile changes.  There were 4 3Com drivers which were initially
moved into 3com/, which now reside in i825xx since they all used
the i82586 chip.

CC: Philip Blundell <philb@gnu.org>
CC: Russell King <linux@arm.linux.org.uk>
CC: <aris@cathedrallabs.org>
CC: Donald Becker <becker@scyld.com>
CC: Chris Beauregard <cpbeaure@undergrad.math.uwaterloo.ca>
CC: Richard Procter <rnp@paradise.net.nz>
CC: Andries Brouwer <aeb@cwi.nl>
CC: "M.Hipp" <hippm@informatik.uni-tuebingen.de>
CC: Richard Hirst <richard@sleepie.demon.co.uk>
CC: Sam Creasey <sammy@oh.verio.com>
CC: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 924 deletions

diff --git a/drivers/net/znet.c b/drivers/net/znet.c
deleted file mode 100644
index 8b8881718f5..00000000000
--- a/drivers/net/znet.c
+++ /dev/null
@@ -1,924 +0,0 @@
-/* znet.c: An Zenith Z-Note ethernet driver for linux. */
-
-/*
-	Written by Donald Becker.
-
-	The author may be reached as becker@scyld.com.
-	This driver is based on the Linux skeleton driver.  The copyright of the
-	skeleton driver is held by the United States Government, as represented
-	by DIRNSA, and it is released under the GPL.
-
-	Thanks to Mike Hollick for alpha testing and suggestions.
-
-  References:
-	   The Crynwr packet driver.
-
-	  "82593 CSMA/CD Core LAN Controller" Intel datasheet, 1992
-	  Intel Microcommunications Databook, Vol. 1, 1990.
-    As usual with Intel, the documentation is incomplete and inaccurate.
-	I had to read the Crynwr packet driver to figure out how to actually
-	use the i82593, and guess at what register bits matched the loosely
-	related i82586.
-
-					Theory of Operation
-
-	The i82593 used in the Zenith Z-Note series operates using two(!) slave
-	DMA	channels, one interrupt, and one 8-bit I/O port.
-
-	While there	several ways to configure '593 DMA system, I chose the one
-	that seemed commensurate with the highest system performance in the face
-	of moderate interrupt latency: Both DMA channels are configured as
-	recirculating ring buffers, with one channel (#0) dedicated to Rx and
-	the other channel (#1) to Tx and configuration.  (Note that this is
-	different than the Crynwr driver, where the Tx DMA channel is initialized
-	before each operation.  That approach simplifies operation and Tx error
-	recovery, but requires additional I/O in normal operation and precludes
-	transmit buffer	chaining.)
-
-	Both rings are set to 8192 bytes using {TX,RX}_RING_SIZE.  This provides
-	a reasonable ring size for Rx, while simplifying DMA buffer allocation --
-	DMA buffers must not cross a 128K boundary.  (In truth the size selection
-	was influenced by my lack of '593 documentation.  I thus was constrained
-	to use the Crynwr '593 initialization table, which sets the Rx ring size
-	to 8K.)
-
-	Despite my usual low opinion about Intel-designed parts, I must admit
-	that the bulk data handling of the i82593 is a good design for
-	an integrated system, like a laptop, where using two slave DMA channels
-	doesn't pose a problem.  I still take issue with using only a single I/O
-	port.  In the same controlled environment there are essentially no
-	limitations on I/O space, and using multiple locations would eliminate
-	the	need for multiple operations when looking at status registers,
-	setting the Rx ring boundary, or switching to promiscuous mode.
-
-	I also question Zenith's selection of the '593: one of the advertised
-	advantages of earlier Intel parts was that if you figured out the magic
-	initialization incantation you could use the same part on many different
-	network types.  Zenith's use of the "FriendlyNet" (sic) connector rather
-	than an	on-board transceiver leads me to believe that they were planning
-	to take advantage of this.  But, uhmmm, the '593 omits all but ethernet
-	functionality from the serial subsystem.
- */
-
-/* 10/2002
-
-   o Resurected for Linux 2.5+ by Marc Zyngier <maz@wild-wind.fr.eu.org> :
-
-   - Removed strange DMA snooping in znet_sent_packet, which lead to
-     TX buffer corruption on my laptop.
-   - Use init_etherdev stuff.
-   - Use kmalloc-ed DMA buffers.
-   - Use as few global variables as possible.
-   - Use proper resources management.
-   - Use wireless/i82593.h as much as possible (structure, constants)
-   - Compiles as module or build-in.
-   - Now survives unplugging/replugging cable.
-
-   Some code was taken from wavelan_cs.
-
-   Tested on a vintage Zenith Z-Note 433Lnp+. Probably broken on
-   anything else. Testers (and detailed bug reports) are welcome :-).
-
-   o TODO :
-
-   - Properly handle multicast
-   - Understand why some traffic patterns add a 1s latency...
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/bitops.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include <linux/i82593.h>
-
-static char version[] __initdata = "znet.c:v1.02 9/23/94 becker@scyld.com\n";
-
-#ifndef ZNET_DEBUG
-#define ZNET_DEBUG 1
-#endif
-static unsigned int znet_debug = ZNET_DEBUG;
-module_param (znet_debug, int, 0);
-MODULE_PARM_DESC (znet_debug, "ZNet debug level");
-MODULE_LICENSE("GPL");
-
-/* The DMA modes we need aren't in <dma.h>. */
-#define DMA_RX_MODE		0x14	/* Auto init, I/O to mem, ++, demand. */
-#define DMA_TX_MODE		0x18	/* Auto init, Mem to I/O, ++, demand. */
-#define dma_page_eq(ptr1, ptr2) ((long)(ptr1)>>17 == (long)(ptr2)>>17)
-#define RX_BUF_SIZE 8192
-#define TX_BUF_SIZE 8192
-#define DMA_BUF_SIZE (RX_BUF_SIZE + 16)	/* 8k + 16 bytes for trailers */
-
-#define TX_TIMEOUT	(HZ/10)
-
-struct znet_private {
-	int rx_dma, tx_dma;
-	spinlock_t lock;
-	short sia_base, sia_size, io_size;
-	struct i82593_conf_block i593_init;
-	/* The starting, current, and end pointers for the packet buffers. */
-	ushort *rx_start, *rx_cur, *rx_end;
-	ushort *tx_start, *tx_cur, *tx_end;
-	ushort tx_buf_len;			/* Tx buffer length, in words. */
-};
-
-/* Only one can be built-in;-> */
-static struct net_device *znet_dev;
-
-struct netidblk {
-	char magic[8];		/* The magic number (string) "NETIDBLK" */
-	unsigned char netid[8]; /* The physical station address */
-	char nettype, globalopt;
-	char vendor[8];		/* The machine vendor and product name. */
-	char product[8];
-	char irq1, irq2;		/* Interrupts, only one is currently used.	*/
-	char dma1, dma2;
-	short dma_mem_misc[8];		/* DMA buffer locations (unused in Linux). */
-	short iobase1, iosize1;
-	short iobase2, iosize2;		/* Second iobase unused. */
-	char driver_options;			/* Misc. bits */
-	char pad;
-};
-
-static int	znet_open(struct net_device *dev);
-static netdev_tx_t znet_send_packet(struct sk_buff *skb,
-				    struct net_device *dev);
-static irqreturn_t znet_interrupt(int irq, void *dev_id);
-static void	znet_rx(struct net_device *dev);
-static int	znet_close(struct net_device *dev);
-static void hardware_init(struct net_device *dev);
-static void update_stop_hit(short ioaddr, unsigned short rx_stop_offset);
-static void znet_tx_timeout (struct net_device *dev);
-
-/* Request needed resources */
-static int znet_request_resources (struct net_device *dev)
-{
-	struct znet_private *znet = netdev_priv(dev);
-
-	if (request_irq (dev->irq, znet_interrupt, 0, "ZNet", dev))
-		goto failed;
-	if (request_dma (znet->rx_dma, "ZNet rx"))
-		goto free_irq;
-	if (request_dma (znet->tx_dma, "ZNet tx"))
-		goto free_rx_dma;
-	if (!request_region (znet->sia_base, znet->sia_size, "ZNet SIA"))
-		goto free_tx_dma;
-	if (!request_region (dev->base_addr, znet->io_size, "ZNet I/O"))
-		goto free_sia;
-
-	return 0;				/* Happy ! */
-
- free_sia:
-	release_region (znet->sia_base, znet->sia_size);
- free_tx_dma:
-	free_dma (znet->tx_dma);
- free_rx_dma:
-	free_dma (znet->rx_dma);
- free_irq:
-	free_irq (dev->irq, dev);
- failed:
-	return -1;
-}
-
-static void znet_release_resources (struct net_device *dev)
-{
-	struct znet_private *znet = netdev_priv(dev);
-
-	release_region (znet->sia_base, znet->sia_size);
-	release_region (dev->base_addr, znet->io_size);
-	free_dma (znet->tx_dma);
-	free_dma (znet->rx_dma);
-	free_irq (dev->irq, dev);
-}
-
-/* Keep the magical SIA stuff in a single function... */
-static void znet_transceiver_power (struct net_device *dev, int on)
-{
-	struct znet_private *znet = netdev_priv(dev);
-	unsigned char v;
-
-	/* Turn on/off the 82501 SIA, using zenith-specific magic. */
-	/* Select LAN control register */
-	outb(0x10, znet->sia_base);
-
-	if (on)
-		v = inb(znet->sia_base + 1) | 0x84;
-	else
-		v = inb(znet->sia_base + 1) & ~0x84;
-
-	outb(v, znet->sia_base+1); /* Turn on/off LAN power (bit 2). */
-}
-
-/* Init the i82593, with current promisc/mcast configuration.
-   Also used from hardware_init. */
-static void znet_set_multicast_list (struct net_device *dev)
-{
-	struct znet_private *znet = netdev_priv(dev);
-	short ioaddr = dev->base_addr;
-	struct i82593_conf_block *cfblk = &znet->i593_init;
-
-	memset(cfblk, 0x00, sizeof(struct i82593_conf_block));
-
-        /* The configuration block.  What an undocumented nightmare.
-	   The first set of values are those suggested (without explanation)
-	   for ethernet in the Intel 82586 databook.  The rest appear to be
-	   completely undocumented, except for cryptic notes in the Crynwr
-	   packet driver.  This driver uses the Crynwr values verbatim. */
-
-	/* maz : Rewritten to take advantage of the wanvelan includes.
-	   At least we have names, not just blind values */
-
-	/* Byte 0 */
-	cfblk->fifo_limit = 10;	/* = 16 B rx and 80 B tx fifo thresholds */
-	cfblk->forgnesi = 0;	/* 0=82C501, 1=AMD7992B compatibility */
-	cfblk->fifo_32 = 1;
-	cfblk->d6mod = 0;  	/* Run in i82593 advanced mode */
-	cfblk->throttle_enb = 1;
-
-	/* Byte 1 */
-	cfblk->throttle = 8;	/* Continuous w/interrupts, 128-clock DMA. */
-	cfblk->cntrxint = 0;	/* enable continuous mode receive interrupts */
-	cfblk->contin = 1;	/* enable continuous mode */
-
-	/* Byte 2 */
-	cfblk->addr_len = ETH_ALEN;
-	cfblk->acloc = 1;	/* Disable source addr insertion by i82593 */
-	cfblk->preamb_len = 2;	/* 8 bytes preamble */
-	cfblk->loopback = 0;	/* Loopback off */
-
-	/* Byte 3 */
-	cfblk->lin_prio = 0;	/* Default priorities & backoff methods. */
-	cfblk->tbofstop = 0;
-	cfblk->exp_prio = 0;
-	cfblk->bof_met = 0;
-
-	/* Byte 4 */
-	cfblk->ifrm_spc = 6;	/* 96 bit times interframe spacing */
-
-	/* Byte 5 */
-	cfblk->slottim_low = 0; /* 512 bit times slot time (low) */
-
-	/* Byte 6 */
-	cfblk->slottim_hi = 2;	/* 512 bit times slot time (high) */
-	cfblk->max_retr = 15;	/* 15 collisions retries */
-
-	/* Byte 7 */
-	cfblk->prmisc = ((dev->flags & IFF_PROMISC) ? 1 : 0); /* Promiscuous mode */
-	cfblk->bc_dis = 0;	/* Enable broadcast reception */
-	cfblk->crs_1 = 0;	/* Don't transmit without carrier sense */
-	cfblk->nocrc_ins = 0;	/* i82593 generates CRC */
-	cfblk->crc_1632 = 0;	/* 32-bit Autodin-II CRC */
-	cfblk->crs_cdt = 0;	/* CD not to be interpreted as CS */
-
-	/* Byte 8 */
-	cfblk->cs_filter = 0;  	/* CS is recognized immediately */
-	cfblk->crs_src = 0;	/* External carrier sense */
-	cfblk->cd_filter = 0;  	/* CD is recognized immediately */
-
-	/* Byte 9 */
-	cfblk->min_fr_len = ETH_ZLEN >> 2; /* Minimum frame length */
-
-	/* Byte A */
-	cfblk->lng_typ = 1;	/* Type/length checks OFF */
-	cfblk->lng_fld = 1; 	/* Disable 802.3 length field check */
-	cfblk->rxcrc_xf = 1;	/* Don't transfer CRC to memory */
-	cfblk->artx = 1;	/* Disable automatic retransmission */
-	cfblk->sarec = 1;	/* Disable source addr trig of CD */
-	cfblk->tx_jabber = 0;	/* Disable jabber jam sequence */
-	cfblk->hash_1 = 1; 	/* Use bits 0-5 in mc address hash */
-	cfblk->lbpkpol = 0; 	/* Loopback pin active high */
-
-	/* Byte B */
-	cfblk->fdx = 0;		/* Disable full duplex operation */
-
-	/* Byte C */
-	cfblk->dummy_6 = 0x3f; 	/* all ones, Default multicast addresses & backoff. */
-	cfblk->mult_ia = 0;	/* No multiple individual addresses */
-	cfblk->dis_bof = 0;	/* Disable the backoff algorithm ?! */
-
-	/* Byte D */
-	cfblk->dummy_1 = 1; 	/* set to 1 */
-	cfblk->tx_ifs_retrig = 3; /* Hmm... Disabled */
-	cfblk->mc_all = (!netdev_mc_empty(dev) ||
-			(dev->flags & IFF_ALLMULTI)); /* multicast all mode */
-	cfblk->rcv_mon = 0;	/* Monitor mode disabled */
-	cfblk->frag_acpt = 0;	/* Do not accept fragments */
-	cfblk->tstrttrs = 0;	/* No start transmission threshold */
-
-	/* Byte E */
-	cfblk->fretx = 1;	/* FIFO automatic retransmission */
-	cfblk->runt_eop = 0;	/* drop "runt" packets */
-	cfblk->hw_sw_pin = 0;	/* ?? */
-	cfblk->big_endn = 0;	/* Big Endian ? no... */
-	cfblk->syncrqs = 1;	/* Synchronous DRQ deassertion... */
-	cfblk->sttlen = 1;  	/* 6 byte status registers */
-	cfblk->rx_eop = 0;  	/* Signal EOP on packet reception */
-	cfblk->tx_eop = 0;  	/* Signal EOP on packet transmission */
-
-	/* Byte F */
-	cfblk->rbuf_size = RX_BUF_SIZE >> 12; /* Set receive buffer size */
-	cfblk->rcvstop = 1; 	/* Enable Receive Stop Register */
-
-	if (znet_debug > 2) {
-		int i;
-		unsigned char *c;
-
-		for (i = 0, c = (char *) cfblk; i < sizeof (*cfblk); i++)
-			printk ("%02X ", c[i]);
-		printk ("\n");
-	}
-
-	*znet->tx_cur++ = sizeof(struct i82593_conf_block);
-	memcpy(znet->tx_cur, cfblk, sizeof(struct i82593_conf_block));
-	znet->tx_cur += sizeof(struct i82593_conf_block)/2;
-	outb(OP0_CONFIGURE | CR0_CHNL, ioaddr);
-
-	/* XXX FIXME maz : Add multicast addresses here, so having a
-	 * multicast address configured isn't equal to IFF_ALLMULTI */
-}
-
-static const struct net_device_ops znet_netdev_ops = {
-	.ndo_open		= znet_open,
-	.ndo_stop		= znet_close,
-	.ndo_start_xmit		= znet_send_packet,
-	.ndo_set_multicast_list = znet_set_multicast_list,
-	.ndo_tx_timeout		= znet_tx_timeout,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_set_mac_address 	= eth_mac_addr,
-	.ndo_validate_addr	= eth_validate_addr,
-};
-
-/* The Z-Note probe is pretty easy.  The NETIDBLK exists in the safe-to-probe
-   BIOS area.  We just scan for the signature, and pull the vital parameters
-   out of the structure. */
-
-static int __init znet_probe (void)
-{
-	int i;
-	struct netidblk *netinfo;
-	struct znet_private *znet;
-	struct net_device *dev;
-	char *p;
-	int err = -ENOMEM;
-
-	/* This code scans the region 0xf0000 to 0xfffff for a "NETIDBLK". */
-	for(p = (char *)phys_to_virt(0xf0000); p < (char *)phys_to_virt(0x100000); p++)
-		if (*p == 'N'  &&  strncmp(p, "NETIDBLK", 8) == 0)
-			break;
-
-	if (p >= (char *)phys_to_virt(0x100000)) {
-		if (znet_debug > 1)
-			printk(KERN_INFO "No Z-Note ethernet adaptor found.\n");
-		return -ENODEV;
-	}
-
-	dev = alloc_etherdev(sizeof(struct znet_private));
-	if (!dev)
-		return -ENOMEM;
-
-	znet = netdev_priv(dev);
-
-	netinfo = (struct netidblk *)p;
-	dev->base_addr = netinfo->iobase1;
-	dev->irq = netinfo->irq1;
-
-	/* The station address is in the "netidblk" at 0x0f0000. */
-	for (i = 0; i < 6; i++)
-		dev->dev_addr[i] = netinfo->netid[i];
-
-	printk(KERN_INFO "%s: ZNET at %#3lx, %pM"
-	       ", using IRQ %d DMA %d and %d.\n",
-	       dev->name, dev->base_addr, dev->dev_addr,
-	       dev->irq, netinfo->dma1, netinfo->dma2);
-
-	if (znet_debug > 1) {
-		printk(KERN_INFO "%s: vendor '%16.16s' IRQ1 %d IRQ2 %d DMA1 %d DMA2 %d.\n",
-		       dev->name, netinfo->vendor,
-		       netinfo->irq1, netinfo->irq2,
-		       netinfo->dma1, netinfo->dma2);
-		printk(KERN_INFO "%s: iobase1 %#x size %d iobase2 %#x size %d net type %2.2x.\n",
-		       dev->name, netinfo->iobase1, netinfo->iosize1,
-		       netinfo->iobase2, netinfo->iosize2, netinfo->nettype);
-	}
-
-	if (znet_debug > 0)
-		printk(KERN_INFO "%s", version);
-
-	znet->rx_dma = netinfo->dma1;
-	znet->tx_dma = netinfo->dma2;
-	spin_lock_init(&znet->lock);
-	znet->sia_base = 0xe6;	/* Magic address for the 82501 SIA */
-	znet->sia_size = 2;
-	/* maz: Despite the '593 being advertised above as using a
-	 * single 8bits I/O port, this driver does many 16bits
-	 * access. So set io_size accordingly */
-	znet->io_size  = 2;
-
-	if (!(znet->rx_start = kmalloc (DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA)))
-		goto free_dev;
-	if (!(znet->tx_start = kmalloc (DMA_BUF_SIZE, GFP_KERNEL | GFP_DMA)))
-		goto free_rx;
-
-	if (!dma_page_eq (znet->rx_start, znet->rx_start + (RX_BUF_SIZE/2-1)) ||
-	    !dma_page_eq (znet->tx_start, znet->tx_start + (TX_BUF_SIZE/2-1))) {
-		printk (KERN_WARNING "tx/rx crossing DMA frontiers, giving up\n");
-		goto free_tx;
-	}
-
-	znet->rx_end = znet->rx_start + RX_BUF_SIZE/2;
-	znet->tx_buf_len = TX_BUF_SIZE/2;
-	znet->tx_end = znet->tx_start + znet->tx_buf_len;
-
-	/* The ZNET-specific entries in the device structure. */
-	dev->netdev_ops = &znet_netdev_ops;
-	dev->watchdog_timeo = TX_TIMEOUT;
-	err = register_netdev(dev);
-	if (err)
-		goto free_tx;
-	znet_dev = dev;
-	return 0;
-
- free_tx:
-	kfree(znet->tx_start);
- free_rx:
-	kfree(znet->rx_start);
- free_dev:
-	free_netdev(dev);
-	return err;
-}
-
-
-static int znet_open(struct net_device *dev)
-{
-	int ioaddr = dev->base_addr;
-
-	if (znet_debug > 2)
-		printk(KERN_DEBUG "%s: znet_open() called.\n", dev->name);
-
-	/* These should never fail.  You can't add devices to a sealed box! */
-	if (znet_request_resources (dev)) {
-		printk(KERN_WARNING "%s: Not opened -- resource busy?!?\n", dev->name);
-		return -EBUSY;
-	}
-
-	znet_transceiver_power (dev, 1);
-
-	/* According to the Crynwr driver we should wait 50 msec. for the
-	   LAN clock to stabilize.  My experiments indicates that the '593 can
-	   be initialized immediately.  The delay is probably needed for the
-	   DC-to-DC converter to come up to full voltage, and for the oscillator
-	   to be spot-on at 20Mhz before transmitting.
-	   Until this proves to be a problem we rely on the higher layers for the
-	   delay and save allocating a timer entry. */
-
-	/* maz : Well, I'm getting every time the following message
-	 * without the delay on a 486@33. This machine is much too
-	 * fast... :-) So maybe the Crynwr driver wasn't wrong after
-	 * all, even if the message is completly harmless on my
-	 * setup. */
-	mdelay (50);
-
-	/* This follows the packet driver's lead, and checks for success. */
-	if (inb(ioaddr) != 0x10 && inb(ioaddr) != 0x00)
-		printk(KERN_WARNING "%s: Problem turning on the transceiver power.\n",
-		       dev->name);
-
-	hardware_init(dev);
-	netif_start_queue (dev);
-
-	return 0;
-}
-
-
-static void znet_tx_timeout (struct net_device *dev)
-{
-	int ioaddr = dev->base_addr;
-	ushort event, tx_status, rx_offset, state;
-
-	outb (CR0_STATUS_0, ioaddr);
-	event = inb (ioaddr);
-	outb (CR0_STATUS_1, ioaddr);
-	tx_status = inw (ioaddr);
-	outb (CR0_STATUS_2, ioaddr);
-	rx_offset = inw (ioaddr);
-	outb (CR0_STATUS_3, ioaddr);
-	state = inb (ioaddr);
-	printk (KERN_WARNING "%s: transmit timed out, status %02x %04x %04x %02x,"
-	 " resetting.\n", dev->name, event, tx_status, rx_offset, state);
-	if (tx_status == TX_LOST_CRS)
-		printk (KERN_WARNING "%s: Tx carrier error, check transceiver cable.\n",
-			dev->name);
-	outb (OP0_RESET, ioaddr);
-	hardware_init (dev);
-	netif_wake_queue (dev);
-}
-
-static netdev_tx_t znet_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
-	int ioaddr = dev->base_addr;
-	struct znet_private *znet = netdev_priv(dev);
-	unsigned long flags;
-	short length = skb->len;
-
-	if (znet_debug > 4)
-		printk(KERN_DEBUG "%s: ZNet_send_packet.\n", dev->name);
-
-	if (length < ETH_ZLEN) {
-		if (skb_padto(skb, ETH_ZLEN))
-			return NETDEV_TX_OK;
-		length = ETH_ZLEN;
-	}
-
-	netif_stop_queue (dev);
-
-	/* Check that the part hasn't reset itself, probably from suspend. */
-	outb(CR0_STATUS_0, ioaddr);
-	if (inw(ioaddr) == 0x0010 &&
-	    inw(ioaddr) == 0x0000 &&
-	    inw(ioaddr) == 0x0010) {
-		if (znet_debug > 1)
-			printk (KERN_WARNING "%s : waking up\n", dev->name);
-		hardware_init(dev);
-		znet_transceiver_power (dev, 1);
-	}
-
-	if (1) {
-		unsigned char *buf = (void *)skb->data;
-		ushort *tx_link = znet->tx_cur - 1;
-		ushort rnd_len = (length + 1)>>1;
-
-		dev->stats.tx_bytes+=length;
-
-		if (znet->tx_cur >= znet->tx_end)
-		  znet->tx_cur = znet->tx_start;
-		*znet->tx_cur++ = length;
-		if (znet->tx_cur + rnd_len + 1 > znet->tx_end) {
-			int semi_cnt = (znet->tx_end - znet->tx_cur)<<1; /* Cvrt to byte cnt. */
-			memcpy(znet->tx_cur, buf, semi_cnt);
-			rnd_len -= semi_cnt>>1;
-			memcpy(znet->tx_start, buf + semi_cnt, length - semi_cnt);
-			znet->tx_cur = znet->tx_start + rnd_len;
-		} else {
-			memcpy(znet->tx_cur, buf, skb->len);
-			znet->tx_cur += rnd_len;
-		}
-		*znet->tx_cur++ = 0;
-
-		spin_lock_irqsave(&znet->lock, flags);
-		{
-			*tx_link = OP0_TRANSMIT | CR0_CHNL;
-			/* Is this always safe to do? */
-			outb(OP0_TRANSMIT | CR0_CHNL, ioaddr);
-		}
-		spin_unlock_irqrestore (&znet->lock, flags);
-
-		netif_start_queue (dev);
-
-		if (znet_debug > 4)
-		  printk(KERN_DEBUG "%s: Transmitter queued, length %d.\n", dev->name, length);
-	}
-	dev_kfree_skb(skb);
-	return NETDEV_TX_OK;
-}
-
-/* The ZNET interrupt handler. */
-static irqreturn_t znet_interrupt(int irq, void *dev_id)
-{
-	struct net_device *dev = dev_id;
-	struct znet_private *znet = netdev_priv(dev);
-	int ioaddr;
-	int boguscnt = 20;
-	int handled = 0;
-
-	spin_lock (&znet->lock);
-
-	ioaddr = dev->base_addr;
-
-	outb(CR0_STATUS_0, ioaddr);
-	do {
-		ushort status = inb(ioaddr);
-		if (znet_debug > 5) {
-			ushort result, rx_ptr, running;
-			outb(CR0_STATUS_1, ioaddr);
-			result = inw(ioaddr);
-			outb(CR0_STATUS_2, ioaddr);
-			rx_ptr = inw(ioaddr);
-			outb(CR0_STATUS_3, ioaddr);
-			running = inb(ioaddr);
-			printk(KERN_DEBUG "%s: interrupt, status %02x, %04x %04x %02x serial %d.\n",
-				 dev->name, status, result, rx_ptr, running, boguscnt);
-		}
-		if ((status & SR0_INTERRUPT) == 0)
-			break;
-
-		handled = 1;
-
-		if ((status & SR0_EVENT_MASK) == SR0_TRANSMIT_DONE ||
-		    (status & SR0_EVENT_MASK) == SR0_RETRANSMIT_DONE ||
-		    (status & SR0_EVENT_MASK) == SR0_TRANSMIT_NO_CRC_DONE) {
-			int tx_status;
-			outb(CR0_STATUS_1, ioaddr);
-			tx_status = inw(ioaddr);
-			/* It's undocumented, but tx_status seems to match the i82586. */
-			if (tx_status & TX_OK) {
-				dev->stats.tx_packets++;
-				dev->stats.collisions += tx_status & TX_NCOL_MASK;
-			} else {
-				if (tx_status & (TX_LOST_CTS | TX_LOST_CRS))
-					dev->stats.tx_carrier_errors++;
-				if (tx_status & TX_UND_RUN)
-					dev->stats.tx_fifo_errors++;
-				if (!(tx_status & TX_HRT_BEAT))
-					dev->stats.tx_heartbeat_errors++;
-				if (tx_status & TX_MAX_COL)
-					dev->stats.tx_aborted_errors++;
-				/* ...and the catch-all. */
-				if ((tx_status | (TX_LOST_CRS | TX_LOST_CTS | TX_UND_RUN | TX_HRT_BEAT | TX_MAX_COL)) != (TX_LOST_CRS | TX_LOST_CTS | TX_UND_RUN | TX_HRT_BEAT | TX_MAX_COL))
-					dev->stats.tx_errors++;
-
-				/* Transceiver may be stuck if cable
-				 * was removed while emitting a
-				 * packet. Flip it off, then on to
-				 * reset it. This is very empirical,
-				 * but it seems to work. */
-
-				znet_transceiver_power (dev, 0);
-				znet_transceiver_power (dev, 1);
-			}
-			netif_wake_queue (dev);
-		}
-
-		if ((status & SR0_RECEPTION) ||
-		    (status & SR0_EVENT_MASK) == SR0_STOP_REG_HIT) {
-			znet_rx(dev);
-		}
-		/* Clear the interrupts we've handled. */
-		outb(CR0_INT_ACK, ioaddr);
-	} while (boguscnt--);
-
-	spin_unlock (&znet->lock);
-
-	return IRQ_RETVAL(handled);
-}
-
-static void znet_rx(struct net_device *dev)
-{
-	struct znet_private *znet = netdev_priv(dev);
-	int ioaddr = dev->base_addr;
-	int boguscount = 1;
-	short next_frame_end_offset = 0; 		/* Offset of next frame start. */
-	short *cur_frame_end;
-	short cur_frame_end_offset;
-
-	outb(CR0_STATUS_2, ioaddr);
-	cur_frame_end_offset = inw(ioaddr);
-
-	if (cur_frame_end_offset == znet->rx_cur - znet->rx_start) {
-		printk(KERN_WARNING "%s: Interrupted, but nothing to receive, offset %03x.\n",
-			   dev->name, cur_frame_end_offset);
-		return;
-	}
-
-	/* Use same method as the Crynwr driver: construct a forward list in
-	   the same area of the backwards links we now have.  This allows us to
-	   pass packets to the upper layers in the order they were received --
-	   important for fast-path sequential operations. */
-	while (znet->rx_start + cur_frame_end_offset != znet->rx_cur &&
-	       ++boguscount < 5) {
-		unsigned short hi_cnt, lo_cnt, hi_status, lo_status;
-		int count, status;
-
-		if (cur_frame_end_offset < 4) {
-			/* Oh no, we have a special case: the frame trailer wraps around
-			   the end of the ring buffer.  We've saved space at the end of
-			   the ring buffer for just this problem. */
-			memcpy(znet->rx_end, znet->rx_start, 8);
-			cur_frame_end_offset += (RX_BUF_SIZE/2);
-		}
-		cur_frame_end = znet->rx_start + cur_frame_end_offset - 4;
-
-		lo_status = *cur_frame_end++;
-		hi_status = *cur_frame_end++;
-		status = ((hi_status & 0xff) << 8) + (lo_status & 0xff);
-		lo_cnt = *cur_frame_end++;
-		hi_cnt = *cur_frame_end++;
-		count = ((hi_cnt & 0xff) << 8) + (lo_cnt & 0xff);
-
-		if (znet_debug > 5)
-		  printk(KERN_DEBUG "Constructing trailer at location %03x, %04x %04x %04x %04x"
-				 " count %#x status %04x.\n",
-				 cur_frame_end_offset<<1, lo_status, hi_status, lo_cnt, hi_cnt,
-				 count, status);
-		cur_frame_end[-4] = status;
-		cur_frame_end[-3] = next_frame_end_offset;
-		cur_frame_end[-2] = count;
-		next_frame_end_offset = cur_frame_end_offset;
-		cur_frame_end_offset -= ((count + 1)>>1) + 3;
-		if (cur_frame_end_offset < 0)
-		  cur_frame_end_offset += RX_BUF_SIZE/2;
-	}
-
-	/* Now step  forward through the list. */
-	do {
-		ushort *this_rfp_ptr = znet->rx_start + next_frame_end_offset;
-		int status = this_rfp_ptr[-4];
-		int pkt_len = this_rfp_ptr[-2];
-
-		if (znet_debug > 5)
-		  printk(KERN_DEBUG "Looking at trailer ending at %04x status %04x length %03x"
-				 " next %04x.\n", next_frame_end_offset<<1, status, pkt_len,
-				 this_rfp_ptr[-3]<<1);
-		/* Once again we must assume that the i82586 docs apply. */
-		if ( ! (status & RX_RCV_OK)) { /* There was an error. */
-			dev->stats.rx_errors++;
-			if (status & RX_CRC_ERR) dev->stats.rx_crc_errors++;
-			if (status & RX_ALG_ERR) dev->stats.rx_frame_errors++;
-#if 0
-			if (status & 0x0200) dev->stats.rx_over_errors++; /* Wrong. */
-			if (status & 0x0100) dev->stats.rx_fifo_errors++;
-#else
-			/* maz : Wild guess... */
-			if (status & RX_OVRRUN) dev->stats.rx_over_errors++;
-#endif
-			if (status & RX_SRT_FRM) dev->stats.rx_length_errors++;
-		} else if (pkt_len > 1536) {
-			dev->stats.rx_length_errors++;
-		} else {
-			/* Malloc up new buffer. */
-			struct sk_buff *skb;
-
-			skb = dev_alloc_skb(pkt_len);
-			if (skb == NULL) {
-				if (znet_debug)
-				  printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
-				dev->stats.rx_dropped++;
-				break;
-			}
-
-			if (&znet->rx_cur[(pkt_len+1)>>1] > znet->rx_end) {
-				int semi_cnt = (znet->rx_end - znet->rx_cur)<<1;
-				memcpy(skb_put(skb,semi_cnt), znet->rx_cur, semi_cnt);
-				memcpy(skb_put(skb,pkt_len-semi_cnt), znet->rx_start,
-					   pkt_len - semi_cnt);
-			} else {
-				memcpy(skb_put(skb,pkt_len), znet->rx_cur, pkt_len);
-				if (znet_debug > 6) {
-					unsigned int *packet = (unsigned int *) skb->data;
-					printk(KERN_DEBUG "Packet data is %08x %08x %08x %08x.\n", packet[0],
-						   packet[1], packet[2], packet[3]);
-				}
-		  }
-		  skb->protocol=eth_type_trans(skb,dev);
-		  netif_rx(skb);
-		  dev->stats.rx_packets++;
-		  dev->stats.rx_bytes += pkt_len;
-		}
-		znet->rx_cur = this_rfp_ptr;
-		if (znet->rx_cur >= znet->rx_end)
-			znet->rx_cur -= RX_BUF_SIZE/2;
-		update_stop_hit(ioaddr, (znet->rx_cur - znet->rx_start)<<1);
-		next_frame_end_offset = this_rfp_ptr[-3];
-		if (next_frame_end_offset == 0)		/* Read all the frames? */
-			break;			/* Done for now */
-		this_rfp_ptr = znet->rx_start + next_frame_end_offset;
-	} while (--boguscount);
-
-	/* If any worth-while packets have been received, dev_rint()
-	   has done a mark_bh(INET_BH) for us and will work on them
-	   when we get to the bottom-half routine. */
-}
-
-/* The inverse routine to znet_open(). */
-static int znet_close(struct net_device *dev)
-{
-	int ioaddr = dev->base_addr;
-
-	netif_stop_queue (dev);
-
-	outb(OP0_RESET, ioaddr);			/* CMD0_RESET */
-
-	if (znet_debug > 1)
-		printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
-	/* Turn off transceiver power. */
-	znet_transceiver_power (dev, 0);
-
-	znet_release_resources (dev);
-
-	return 0;
-}
-
-static void show_dma(struct net_device *dev)
-{
-	short ioaddr = dev->base_addr;
-	unsigned char stat = inb (ioaddr);
-	struct znet_private *znet = netdev_priv(dev);
-	unsigned long flags;
-	short dma_port = ((znet->tx_dma&3)<<2) + IO_DMA2_BASE;
-	unsigned addr = inb(dma_port);
-	short residue;
-
-	addr |= inb(dma_port) << 8;
-	residue = get_dma_residue(znet->tx_dma);
-
-	if (znet_debug > 1) {
-		flags=claim_dma_lock();
-		printk(KERN_DEBUG "Stat:%02x Addr: %04x cnt:%3x\n",
-		       stat, addr<<1, residue);
-		release_dma_lock(flags);
-	}
-}
-
-/* Initialize the hardware.  We have to do this when the board is open()ed
-   or when we come out of suspend mode. */
-static void hardware_init(struct net_device *dev)
-{
-	unsigned long flags;
-	short ioaddr = dev->base_addr;
-	struct znet_private *znet = netdev_priv(dev);
-
-	znet->rx_cur = znet->rx_start;
-	znet->tx_cur = znet->tx_start;
-
-	/* Reset the chip, and start it up. */
-	outb(OP0_RESET, ioaddr);
-
-	flags=claim_dma_lock();
-	disable_dma(znet->rx_dma); 		/* reset by an interrupting task. */
-	clear_dma_ff(znet->rx_dma);
-	set_dma_mode(znet->rx_dma, DMA_RX_MODE);
-	set_dma_addr(znet->rx_dma, (unsigned int) znet->rx_start);
-	set_dma_count(znet->rx_dma, RX_BUF_SIZE);
-	enable_dma(znet->rx_dma);
-	/* Now set up the Tx channel. */
-	disable_dma(znet->tx_dma);
-	clear_dma_ff(znet->tx_dma);
-	set_dma_mode(znet->tx_dma, DMA_TX_MODE);
-	set_dma_addr(znet->tx_dma, (unsigned int) znet->tx_start);
-	set_dma_count(znet->tx_dma, znet->tx_buf_len<<1);
-	enable_dma(znet->tx_dma);
-	release_dma_lock(flags);
-
-	if (znet_debug > 1)
-	  printk(KERN_DEBUG "%s: Initializing the i82593, rx buf %p tx buf %p\n",
-			 dev->name, znet->rx_start,znet->tx_start);
-	/* Do an empty configure command, just like the Crynwr driver.  This
-	   resets to chip to its default values. */
-	*znet->tx_cur++ = 0;
-	*znet->tx_cur++ = 0;
-	show_dma(dev);
-	outb(OP0_CONFIGURE | CR0_CHNL, ioaddr);
-
-	znet_set_multicast_list (dev);
-
-	*znet->tx_cur++ = 6;
-	memcpy(znet->tx_cur, dev->dev_addr, 6);
-	znet->tx_cur += 3;
-	show_dma(dev);
-	outb(OP0_IA_SETUP | CR0_CHNL, ioaddr);
-	show_dma(dev);
-
-	update_stop_hit(ioaddr, 8192);
-	if (znet_debug > 1)  printk(KERN_DEBUG "enabling Rx.\n");
-	outb(OP0_RCV_ENABLE, ioaddr);
-	netif_start_queue (dev);
-}
-
-static void update_stop_hit(short ioaddr, unsigned short rx_stop_offset)
-{
-	outb(OP0_SWIT_TO_PORT_1 | CR0_CHNL, ioaddr);
-	if (znet_debug > 5)
-	  printk(KERN_DEBUG "Updating stop hit with value %02x.\n",
-			 (rx_stop_offset >> 6) | CR1_STOP_REG_UPDATE);
-	outb((rx_stop_offset >> 6) | CR1_STOP_REG_UPDATE, ioaddr);
-	outb(OP1_SWIT_TO_PORT_0, ioaddr);
-}
-
-static __exit void znet_cleanup (void)
-{
-	if (znet_dev) {
-		struct znet_private *znet = netdev_priv(znet_dev);
-
-		unregister_netdev (znet_dev);
-		kfree (znet->rx_start);
-		kfree (znet->tx_start);
-		free_netdev (znet_dev);
-	}
-}
-
-module_init (znet_probe);
-module_exit (znet_cleanup);