8390: Move the 8390 related drivers

Moves the drivers for the National Semi-conductor 8390 chipset into
drivers/net/ethernet/8390/ and the necessary Kconfig and Makefile
changes.

CC: Donald Becker <becker@scyld.com>
CC: Paul Gortmaker <paul.gortmaker@windriver.com>
CC: Alain Malek <alain.malek@cryogen.com>
CC: Peter De Schrijver <p2@mind.be>
CC: "David Huggins-Daines" <dhd@debian.org>
CC: Wim Dumon <wimpie@kotnet.org>
CC: Yoshinori Sato <ysato@users.sourceforge.jp>
CC: David Hinds <dahinds@users.sourceforge.net>
CC: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 799 insertions, 0 deletions

diff --git a/drivers/net/ethernet/8390/ne2.c b/drivers/net/ethernet/8390/ne2.c
new file mode 100644
index 000000000000..70cdc6996342
--- /dev/null
+++ b/drivers/net/ethernet/8390/ne2.c
@@ -0,0 +1,799 @@
+/* ne2.c: A NE/2 Ethernet Driver for Linux. */
+/*
+   Based on the NE2000 driver written by Donald Becker (1992-94).
+   modified by Wim Dumon (Apr 1996)
+
+   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 wimpie@linux.cc.kuleuven.ac.be
+
+   Currently supported: NE/2
+   This patch was never tested on other MCA-ethernet adapters, but it
+   might work. Just give it a try and let me know if you have problems.
+   Also mail me if it really works, please!
+
+   Changelog:
+   Mon Feb  3 16:26:02 MET 1997
+   - adapted the driver to work with the 2.1.25 kernel
+   - multiple ne2 support (untested)
+   - module support (untested)
+
+   Fri Aug 28 00:18:36 CET 1998 (David Weinehall)
+   - fixed a few minor typos
+   - made the MODULE_PARM conditional (it only works with the v2.1.x kernels)
+   - fixed the module support (Now it's working...)
+
+   Mon Sep  7 19:01:44 CET 1998 (David Weinehall)
+   - added support for Arco Electronics AE/2-card (experimental)
+
+   Mon Sep 14 09:53:42 CET 1998 (David Weinehall)
+   - added support for Compex ENET-16MC/P (experimental)
+
+   Tue Sep 15 16:21:12 CET 1998 (David Weinehall, Magnus Jonsson, Tomas Ogren)
+   - Miscellaneous bugfixes
+
+   Tue Sep 19 16:21:12 CET 1998 (Magnus Jonsson)
+   - Cleanup
+
+   Wed Sep 23 14:33:34 CET 1998 (David Weinehall)
+   - Restructuring and rewriting for v2.1.x compliance
+
+   Wed Oct 14 17:19:21 CET 1998 (David Weinehall)
+   - Added code that unregisters irq and proc-info
+   - Version# bump
+
+   Mon Nov 16 15:28:23 CET 1998 (Wim Dumon)
+   - pass 'dev' as last parameter of request_irq in stead of 'NULL'
+
+   Wed Feb  7 21:24:00 CET 2001 (Alfred Arnold)
+   - added support for the D-Link DE-320CT
+
+   *    WARNING
+	-------
+	This is alpha-test software.  It is not guaranteed to work. As a
+	matter of fact, I'm quite sure there are *LOTS* of bugs in here. I
+	would like to hear from you if you use this driver, even if it works.
+	If it doesn't work, be sure to send me a mail with the problems !
+*/
+
+static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n";
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/in.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/mca-legacy.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/bitops.h>
+#include <linux/jiffies.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+
+#include "8390.h"
+
+#define DRV_NAME "ne2"
+
+/* Some defines that people can play with if so inclined. */
+
+/* Do we perform extra sanity checks on stuff ? */
+/* #define NE_SANITY_CHECK */
+
+/* Do we implement the read before write bugfix ? */
+/* #define NE_RW_BUGFIX */
+
+/* Do we have a non std. amount of memory? (in units of 256 byte pages) */
+/* #define PACKETBUF_MEMSIZE	0x40 */
+
+
+/* ---- No user-serviceable parts below ---- */
+
+#define NE_BASE	 (dev->base_addr)
+#define NE_CMD	 	0x00
+#define NE_DATAPORT	0x10	/* NatSemi-defined port window offset. */
+#define NE_RESET	0x20	/* Issue a read to reset, a write to clear. */
+#define NE_IO_EXTENT	0x30
+
+#define NE1SM_START_PG	0x20	/* First page of TX buffer */
+#define NE1SM_STOP_PG 	0x40	/* Last page +1 of RX ring */
+#define NESM_START_PG	0x40	/* First page of TX buffer */
+#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */
+
+/* From the .ADF file: */
+static unsigned int addresses[7] __initdata =
+		{0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
+static int irqs[4] __initdata = {3, 4, 5, 9};
+
+/* From the D-Link ADF file: */
+static unsigned int dlink_addresses[4] __initdata =
+                {0x300, 0x320, 0x340, 0x360};
+static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
+
+struct ne2_adapters_t {
+	unsigned int	id;
+	char		*name;
+};
+
+static struct ne2_adapters_t ne2_adapters[] __initdata = {
+	{ 0x6354, "Arco Ethernet Adapter AE/2" },
+	{ 0x70DE, "Compex ENET-16 MC/P" },
+	{ 0x7154, "Novell Ethernet Adapter NE/2" },
+        { 0x56ea, "D-Link DE-320CT" },
+	{ 0x0000, NULL }
+};
+
+extern int netcard_probe(struct net_device *dev);
+
+static int ne2_probe1(struct net_device *dev, int slot);
+
+static void ne_reset_8390(struct net_device *dev);
+static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+		int ring_page);
+static void ne_block_input(struct net_device *dev, int count,
+		struct sk_buff *skb, int ring_offset);
+static void ne_block_output(struct net_device *dev, const int count,
+		const unsigned char *buf, const int start_page);
+
+
+/*
+ * special code to read the DE-320's MAC address EEPROM.  In contrast to a
+ * standard NE design, this is a serial EEPROM (93C46) that has to be read
+ * bit by bit.  The EEPROM cotrol port at base + 0x1e has the following
+ * layout:
+ *
+ * Bit 0 = Data out (read from EEPROM)
+ * Bit 1 = Data in  (write to EEPROM)
+ * Bit 2 = Clock
+ * Bit 3 = Chip Select
+ * Bit 7 = ~50 kHz clock for defined delays
+ *
+ */
+
+static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
+{
+	int z;
+	unsigned char v1, v2;
+
+	/* write the value to the NIC EEPROM register */
+
+	outb(value, addr + 0x1e);
+
+	/* now wait the clock line to toggle twice.  Effectively, we are
+	   waiting (at least) for one clock cycle */
+
+	for (z = 0; z < 2; z++) {
+		do {
+			v1 = inb(addr + 0x1e);
+			v2 = inb(addr + 0x1e);
+		}
+		while (!((v1 ^ v2) & 0x80));
+	}
+}
+
+static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
+{
+	/* shift data bit into correct position */
+
+	bit = bit << 1;
+
+	/* write value, keep clock line high for two cycles */
+
+	dlink_put_eeprom(0x09 | bit, addr);
+	dlink_put_eeprom(0x0d | bit, addr);
+	dlink_put_eeprom(0x0d | bit, addr);
+	dlink_put_eeprom(0x09 | bit, addr);
+}
+
+static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
+{
+	int z;
+
+	/* adjust bits so that they are left-aligned in a 16-bit-word */
+
+	value = value << (16 - len);
+
+	/* shift bits out to the EEPROM */
+
+	for (z = 0; z < len; z++) {
+		dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
+		value = value << 1;
+	}
+}
+
+static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
+{
+	int z;
+	unsigned int value = 0;
+
+	/* pull the CS line low for a moment.  This resets the EEPROM-
+	   internal logic, and makes it ready for a new command. */
+
+	dlink_put_eeprom(0x01, addr);
+	dlink_put_eeprom(0x09, addr);
+
+	/* send one start bit, read command (1 - 0), plus the address to
+           the EEPROM */
+
+	dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
+
+	/* get the data word.  We clock by sending 0s to the EEPROM, which
+	   get ignored during the read process */
+
+	for (z = 0; z < 16; z++) {
+		dlink_send_eeprom_bit(0, addr);
+		value = (value << 1) | (inb(addr + 0x1e) & 0x01);
+	}
+
+	return value;
+}
+
+/*
+ * Note that at boot, this probe only picks up one card at a time.
+ */
+
+static int __init do_ne2_probe(struct net_device *dev)
+{
+	static int current_mca_slot = -1;
+	int i;
+	int adapter_found = 0;
+
+	/* Do not check any supplied i/o locations.
+	   POS registers usually don't fail :) */
+
+	/* MCA cards have POS registers.
+	   Autodetecting MCA cards is extremely simple.
+	   Just search for the card. */
+
+	for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
+		current_mca_slot =
+			mca_find_unused_adapter(ne2_adapters[i].id, 0);
+
+		if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
+			int res;
+			mca_set_adapter_name(current_mca_slot,
+					ne2_adapters[i].name);
+			mca_mark_as_used(current_mca_slot);
+
+			res = ne2_probe1(dev, current_mca_slot);
+			if (res)
+				mca_mark_as_unused(current_mca_slot);
+			return res;
+		}
+	}
+	return -ENODEV;
+}
+
+#ifndef MODULE
+struct net_device * __init ne2_probe(int unit)
+{
+	struct net_device *dev = alloc_eip_netdev();
+	int err;
+
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	sprintf(dev->name, "eth%d", unit);
+	netdev_boot_setup_check(dev);
+
+	err = do_ne2_probe(dev);
+	if (err)
+		goto out;
+	return dev;
+out:
+	free_netdev(dev);
+	return ERR_PTR(err);
+}
+#endif
+
+static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
+{
+	int len=0;
+
+	len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
+	len += sprintf(buf+len, "Driver written by Wim Dumon ");
+	len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
+	len += sprintf(buf+len, "Modified by ");
+	len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
+	len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
+	len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
+	len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
+	len += sprintf(buf+len, "IRQ    : %d\n", dev->irq);
+	len += sprintf(buf+len, "HW addr : %pM\n", dev->dev_addr);
+
+	return len;
+}
+
+static int __init ne2_probe1(struct net_device *dev, int slot)
+{
+	int i, base_addr, irq, retval;
+	unsigned char POS;
+	unsigned char SA_prom[32];
+	const char *name = "NE/2";
+	int start_page, stop_page;
+	static unsigned version_printed;
+
+	if (ei_debug && version_printed++ == 0)
+		printk(version);
+
+	printk("NE/2 ethercard found in slot %d:", slot);
+
+	/* Read base IO and IRQ from the POS-registers */
+	POS = mca_read_stored_pos(slot, 2);
+	if(!(POS % 2)) {
+		printk(" disabled.\n");
+		return -ENODEV;
+	}
+
+	/* handle different POS register structure for D-Link card */
+
+	if (mca_read_stored_pos(slot, 0) == 0xea) {
+		base_addr = dlink_addresses[(POS >> 5) & 0x03];
+		irq = dlink_irqs[(POS >> 2) & 0x07];
+	}
+        else {
+		i = (POS & 0xE)>>1;
+		/* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
+	   	" en zou het moeten werken -> %d\n", i);
+	   	The above line was for remote testing, thanx to sdog ... */
+		base_addr = addresses[i - 1];
+		irq = irqs[(POS & 0x60)>>5];
+	}
+
+	if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
+		return -EBUSY;
+
+#ifdef DEBUG
+	printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
+			base_addr, irq);
+#endif
+
+#ifndef CRYNWR_WAY
+	/* Reset the card the way they do it in the Crynwr packet driver */
+	for (i=0; i<8; i++)
+		outb(0x0, base_addr + NE_RESET);
+	inb(base_addr + NE_RESET);
+	outb(0x21, base_addr + NE_CMD);
+	if (inb(base_addr + NE_CMD) != 0x21) {
+		printk("NE/2 adapter not responding\n");
+		retval = -ENODEV;
+		goto out;
+	}
+
+	/* In the crynwr sources they do a RAM-test here. I skip it. I suppose
+	   my RAM is okay.  Suppose your memory is broken.  Then this test
+	   should fail and you won't be able to use your card.  But if I do not
+	   test, you won't be able to use your card, neither.  So this test
+	   won't help you. */
+
+#else  /* _I_ never tested it this way .. Go ahead and try ...*/
+	/* Reset card. Who knows what dain-bramaged state it was left in. */
+	{
+		unsigned long reset_start_time = jiffies;
+
+		/* DON'T change these to inb_p/outb_p or reset will fail on
+		   clones.. */
+		outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
+
+		while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
+			if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
+				printk(" not found (no reset ack).\n");
+				retval = -ENODEV;
+				goto out;
+			}
+
+		outb_p(0xff, base_addr + EN0_ISR);         /* Ack all intr. */
+	}
+#endif
+
+
+	/* Read the 16 bytes of station address PROM.
+	   We must first initialize registers, similar to
+	   NS8390p_init(eifdev, 0).
+	   We can't reliably read the SAPROM address without this.
+	   (I learned the hard way!). */
+	{
+		struct {
+			unsigned char value, offset;
+		} program_seq[] = {
+						/* Select page 0 */
+			{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
+			{0x49,	EN0_DCFG},  /* Set WORD-wide (0x49) access. */
+			{0x00,	EN0_RCNTLO},  /* Clear the count regs. */
+			{0x00,	EN0_RCNTHI},
+			{0x00,	EN0_IMR},  /* Mask completion irq. */
+			{0xFF,	EN0_ISR},
+			{E8390_RXOFF, EN0_RXCR},  /* 0x20  Set to monitor */
+			{E8390_TXOFF, EN0_TXCR},  /* 0x02  and loopback mode. */
+			{32,	EN0_RCNTLO},
+			{0x00,	EN0_RCNTHI},
+			{0x00,	EN0_RSARLO},  /* DMA starting at 0x0000. */
+			{0x00,	EN0_RSARHI},
+			{E8390_RREAD+E8390_START, E8390_CMD},
+		};
+
+		for (i = 0; i < ARRAY_SIZE(program_seq); i++)
+			outb_p(program_seq[i].value, base_addr +
+				program_seq[i].offset);
+
+	}
+	for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
+		SA_prom[i] = inb(base_addr + NE_DATAPORT);
+	}
+
+	/* I don't know whether the previous sequence includes the general
+           board reset procedure, so better don't omit it and just overwrite
+           the garbage read from a DE-320 with correct stuff. */
+
+	if (mca_read_stored_pos(slot, 0) == 0xea) {
+		unsigned int v;
+
+		for (i = 0; i < 3; i++) {
+ 			v = dlink_get_eeprom(i, base_addr);
+			SA_prom[(i << 1)    ] = v & 0xff;
+			SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
+		}
+	}
+
+	start_page = NESM_START_PG;
+	stop_page = NESM_STOP_PG;
+
+	dev->irq=irq;
+
+	/* Snarf the interrupt now.  There's no point in waiting since we cannot
+	   share and the board will usually be enabled. */
+	retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev);
+	if (retval) {
+		printk (" unable to get IRQ %d (irqval=%d).\n",
+				dev->irq, retval);
+		goto out;
+	}
+
+	dev->base_addr = base_addr;
+
+	for(i = 0; i < ETHER_ADDR_LEN; i++)
+		dev->dev_addr[i] = SA_prom[i];
+
+	printk(" %pM\n", dev->dev_addr);
+
+	printk("%s: %s found at %#x, using IRQ %d.\n",
+			dev->name, name, base_addr, dev->irq);
+
+	mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
+
+	ei_status.name = name;
+	ei_status.tx_start_page = start_page;
+	ei_status.stop_page = stop_page;
+	ei_status.word16 = (2 == 2);
+
+	ei_status.rx_start_page = start_page + TX_PAGES;
+#ifdef PACKETBUF_MEMSIZE
+	/* Allow the packet buffer size to be overridden by know-it-alls. */
+	ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
+#endif
+
+	ei_status.reset_8390 = &ne_reset_8390;
+	ei_status.block_input = &ne_block_input;
+	ei_status.block_output = &ne_block_output;
+	ei_status.get_8390_hdr = &ne_get_8390_hdr;
+
+	ei_status.priv = slot;
+
+	dev->netdev_ops = &eip_netdev_ops;
+	NS8390p_init(dev, 0);
+
+	retval = register_netdev(dev);
+	if (retval)
+		goto out1;
+	return 0;
+out1:
+	mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
+	free_irq(dev->irq, dev);
+out:
+	release_region(base_addr, NE_IO_EXTENT);
+	return retval;
+}
+
+/* Hard reset the card.  This used to pause for the same period that a
+   8390 reset command required, but that shouldn't be necessary. */
+static void ne_reset_8390(struct net_device *dev)
+{
+	unsigned long reset_start_time = jiffies;
+
+	if (ei_debug > 1)
+		printk("resetting the 8390 t=%ld...", jiffies);
+
+	/* DON'T change these to inb_p/outb_p or reset will fail on clones. */
+	outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
+
+	ei_status.txing = 0;
+	ei_status.dmaing = 0;
+
+	/* This check _should_not_ be necessary, omit eventually. */
+	while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
+			printk("%s: ne_reset_8390() did not complete.\n",
+					dev->name);
+			break;
+		}
+	outb_p(ENISR_RESET, NE_BASE + EN0_ISR);	/* Ack intr. */
+}
+
+/* Grab the 8390 specific header. Similar to the block_input routine, but
+   we don't need to be concerned with ring wrap as the header will be at
+   the start of a page, so we optimize accordingly. */
+
+static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
+		int ring_page)
+{
+
+	int nic_base = dev->base_addr;
+
+	/* This *shouldn't* happen.
+	   If it does, it's the last thing you'll see */
+	if (ei_status.dmaing) {
+		printk("%s: DMAing conflict in ne_get_8390_hdr "
+				"[DMAstat:%d][irqlock:%d].\n",
+				dev->name, ei_status.dmaing, ei_status.irqlock);
+		return;
+	}
+
+	ei_status.dmaing |= 0x01;
+	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+	outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
+	outb_p(0, nic_base + EN0_RCNTHI);
+	outb_p(0, nic_base + EN0_RSARLO);		/* On page boundary */
+	outb_p(ring_page, nic_base + EN0_RSARHI);
+	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+
+	if (ei_status.word16)
+		insw(NE_BASE + NE_DATAPORT, hdr,
+				sizeof(struct e8390_pkt_hdr)>>1);
+	else
+		insb(NE_BASE + NE_DATAPORT, hdr,
+				sizeof(struct e8390_pkt_hdr));
+
+	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
+	ei_status.dmaing &= ~0x01;
+}
+
+/* Block input and output, similar to the Crynwr packet driver.  If you
+   are porting to a new ethercard, look at the packet driver source for
+   hints. The NEx000 doesn't share the on-board packet memory -- you have
+   to put the packet out through the "remote DMA" dataport using outb. */
+
+static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
+		int ring_offset)
+{
+#ifdef NE_SANITY_CHECK
+	int xfer_count = count;
+#endif
+	int nic_base = dev->base_addr;
+	char *buf = skb->data;
+
+	/* This *shouldn't* happen.
+	   If it does, it's the last thing you'll see */
+	if (ei_status.dmaing) {
+		printk("%s: DMAing conflict in ne_block_input "
+				"[DMAstat:%d][irqlock:%d].\n",
+				dev->name, ei_status.dmaing, ei_status.irqlock);
+		return;
+	}
+	ei_status.dmaing |= 0x01;
+	outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
+	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
+	outb_p(count >> 8, nic_base + EN0_RCNTHI);
+	outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
+	outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
+	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+	if (ei_status.word16) {
+		insw(NE_BASE + NE_DATAPORT,buf,count>>1);
+		if (count & 0x01) {
+			buf[count-1] = inb(NE_BASE + NE_DATAPORT);
+#ifdef NE_SANITY_CHECK
+			xfer_count++;
+#endif
+		}
+	} else {
+		insb(NE_BASE + NE_DATAPORT, buf, count);
+	}
+
+#ifdef NE_SANITY_CHECK
+	/* This was for the ALPHA version only, but enough people have
+	   been encountering problems so it is still here.  If you see
+	   this message you either 1) have a slightly incompatible clone
+	   or 2) have noise/speed problems with your bus. */
+	if (ei_debug > 1) {	/* DMA termination address check... */
+		int addr, tries = 20;
+		do {
+			/* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
+			   -- it's broken for Rx on some cards! */
+			int high = inb_p(nic_base + EN0_RSARHI);
+			int low = inb_p(nic_base + EN0_RSARLO);
+			addr = (high << 8) + low;
+			if (((ring_offset + xfer_count) & 0xff) == low)
+				break;
+		} while (--tries > 0);
+		if (tries <= 0)
+			printk("%s: RX transfer address mismatch,"
+				"%#4.4x (expected) vs. %#4.4x (actual).\n",
+				dev->name, ring_offset + xfer_count, addr);
+	}
+#endif
+	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
+	ei_status.dmaing &= ~0x01;
+}
+
+static void ne_block_output(struct net_device *dev, int count,
+		const unsigned char *buf, const int start_page)
+{
+	int nic_base = NE_BASE;
+	unsigned long dma_start;
+#ifdef NE_SANITY_CHECK
+	int retries = 0;
+#endif
+
+	/* Round the count up for word writes. Do we need to do this?
+	   What effect will an odd byte count have on the 8390?
+	   I should check someday. */
+	if (ei_status.word16 && (count & 0x01))
+		count++;
+
+	/* This *shouldn't* happen.
+	   If it does, it's the last thing you'll see */
+	if (ei_status.dmaing) {
+		printk("%s: DMAing conflict in ne_block_output."
+				"[DMAstat:%d][irqlock:%d]\n",
+				dev->name, ei_status.dmaing, ei_status.irqlock);
+		return;
+	}
+	ei_status.dmaing |= 0x01;
+	/* We should already be in page 0, but to be safe... */
+	outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
+
+#ifdef NE_SANITY_CHECK
+retry:
+#endif
+
+#ifdef NE8390_RW_BUGFIX
+	/* Handle the read-before-write bug the same way as the
+	   Crynwr packet driver -- the NatSemi method doesn't work.
+	   Actually this doesn't always work either, but if you have
+	   problems with your NEx000 this is better than nothing! */
+	outb_p(0x42, nic_base + EN0_RCNTLO);
+	outb_p(0x00, nic_base + EN0_RCNTHI);
+	outb_p(0x42, nic_base + EN0_RSARLO);
+	outb_p(0x00, nic_base + EN0_RSARHI);
+	outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
+	/* Make certain that the dummy read has occurred. */
+	SLOW_DOWN_IO;
+	SLOW_DOWN_IO;
+	SLOW_DOWN_IO;
+#endif
+
+	outb_p(ENISR_RDC, nic_base + EN0_ISR);
+
+	/* Now the normal output. */
+	outb_p(count & 0xff, nic_base + EN0_RCNTLO);
+	outb_p(count >> 8,   nic_base + EN0_RCNTHI);
+	outb_p(0x00, nic_base + EN0_RSARLO);
+	outb_p(start_page, nic_base + EN0_RSARHI);
+
+	outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
+	if (ei_status.word16) {
+		outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
+	} else {
+		outsb(NE_BASE + NE_DATAPORT, buf, count);
+	}
+
+	dma_start = jiffies;
+
+#ifdef NE_SANITY_CHECK
+	/* This was for the ALPHA version only, but enough people have
+	   been encountering problems so it is still here. */
+
+	if (ei_debug > 1) {		/* DMA termination address check... */
+		int addr, tries = 20;
+		do {
+			int high = inb_p(nic_base + EN0_RSARHI);
+			int low = inb_p(nic_base + EN0_RSARLO);
+			addr = (high << 8) + low;
+			if ((start_page << 8) + count == addr)
+				break;
+		} while (--tries > 0);
+		if (tries <= 0) {
+			printk("%s: Tx packet transfer address mismatch,"
+					"%#4.4x (expected) vs. %#4.4x (actual).\n",
+					dev->name, (start_page << 8) + count, addr);
+			if (retries++ == 0)
+				goto retry;
+		}
+	}
+#endif
+
+	while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
+		if (time_after(jiffies, dma_start + 2*HZ/100)) {		/* 20ms */
+			printk("%s: timeout waiting for Tx RDC.\n", dev->name);
+			ne_reset_8390(dev);
+			NS8390p_init(dev, 1);
+			break;
+		}
+
+	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
+	ei_status.dmaing &= ~0x01;
+}
+
+
+#ifdef MODULE
+#define MAX_NE_CARDS	4	/* Max number of NE cards per module */
+static struct net_device *dev_ne[MAX_NE_CARDS];
+static int io[MAX_NE_CARDS];
+static int irq[MAX_NE_CARDS];
+static int bad[MAX_NE_CARDS];	/* 0xbad = bad sig or no reset ack */
+MODULE_LICENSE("GPL");
+
+module_param_array(io, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param_array(bad, int, NULL, 0);
+MODULE_PARM_DESC(io, "(ignored)");
+MODULE_PARM_DESC(irq, "(ignored)");
+MODULE_PARM_DESC(bad, "(ignored)");
+
+/* Module code fixed by David Weinehall */
+
+int __init init_module(void)
+{
+	struct net_device *dev;
+	int this_dev, found = 0;
+
+	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+		dev = alloc_eip_netdev();
+		if (!dev)
+			break;
+		dev->irq = irq[this_dev];
+		dev->mem_end = bad[this_dev];
+		dev->base_addr = io[this_dev];
+		if (do_ne2_probe(dev) == 0) {
+			dev_ne[found++] = dev;
+			continue;
+		}
+		free_netdev(dev);
+		break;
+	}
+	if (found)
+		return 0;
+	printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
+	return -ENXIO;
+}
+
+static void cleanup_card(struct net_device *dev)
+{
+	mca_mark_as_unused(ei_status.priv);
+	mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
+	free_irq(dev->irq, dev);
+	release_region(dev->base_addr, NE_IO_EXTENT);
+}
+
+void __exit cleanup_module(void)
+{
+	int this_dev;
+
+	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+		struct net_device *dev = dev_ne[this_dev];
+		if (dev) {
+			unregister_netdev(dev);
+			cleanup_card(dev);
+			free_netdev(dev);
+		}
+	}
+}
+#endif /* MODULE */