Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1001 insertions, 0 deletions

diff --git a/drivers/net/ethernet/8390/ne.c b/drivers/net/ethernet/8390/ne.c
new file mode 100644
index 000000000..1c97e39b4
--- /dev/null
+++ b/drivers/net/ethernet/8390/ne.c
@@ -0,0 +1,1001 @@
+/* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
+/*
+    Written 1992-94 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 driver should work with many programmed-I/O 8390-based ethernet
+    boards.  Currently it supports the NE1000, NE2000, many clones,
+    and some Cabletron products.
+
+    Changelog:
+
+    Paul Gortmaker	: use ENISR_RDC to monitor Tx PIO uploads, made
+			  sanity checks and bad clone support optional.
+    Paul Gortmaker	: new reset code, reset card after probe at boot.
+    Paul Gortmaker	: multiple card support for module users.
+    Paul Gortmaker	: Support for PCI ne2k clones, similar to lance.c
+    Paul Gortmaker	: Allow users with bad cards to avoid full probe.
+    Paul Gortmaker	: PCI probe changes, more PCI cards supported.
+    rjohnson@analogic.com : Changed init order so an interrupt will only
+    occur after memory is allocated for dev->priv. Deallocated memory
+    last in cleanup_modue()
+    Richard Guenther    : Added support for ISAPnP cards
+    Paul Gortmaker	: Discontinued PCI support - use ne2k-pci.c instead.
+    Hayato Fujiwara	: Add m32r support.
+
+*/
+
+/* Routines for the NatSemi-based designs (NE[12]000). */
+
+static const char version1[] =
+"ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
+static const char version2[] =
+"Last modified Nov 1, 2000 by Paul Gortmaker\n";
+
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/isapnp.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/jiffies.h>
+#include <linux/platform_device.h>
+
+#include <asm/io.h>
+
+#include "8390.h"
+
+#define DRV_NAME "ne"
+
+/* Some defines that people can play with if so inclined. */
+
+/* Do we support clones that don't adhere to 14,15 of the SAprom ? */
+#define SUPPORT_NE_BAD_CLONES
+/* 0xbad = bad sig or no reset ack */
+#define BAD 0xbad
+
+#define MAX_NE_CARDS	4	/* Max number of NE cards per module */
+static struct platform_device *pdev_ne[MAX_NE_CARDS];
+static int io[MAX_NE_CARDS];
+static int irq[MAX_NE_CARDS];
+static int bad[MAX_NE_CARDS];
+static u32 ne_msg_enable;
+
+#ifdef MODULE
+module_param_hw_array(io, int, ioport, NULL, 0);
+module_param_hw_array(irq, int, irq, NULL, 0);
+module_param_array(bad, int, NULL, 0);
+module_param_named(msg_enable, ne_msg_enable, uint, 0444);
+MODULE_PARM_DESC(io, "I/O base address(es),required");
+MODULE_PARM_DESC(irq, "IRQ number(s)");
+MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
+MODULE_PARM_DESC(msg_enable, "Debug message level (see linux/netdevice.h for bitmap)");
+MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
+MODULE_LICENSE("GPL");
+#endif /* MODULE */
+
+/* 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 */
+
+/* This is set up so that no ISA autoprobe takes place. We can't guarantee
+that the ne2k probe is the last 8390 based probe to take place (as it
+is at boot) and so the probe will get confused by any other 8390 cards.
+ISA device autoprobes on a running machine are not recommended anyway. */
+#if !defined(MODULE) && defined(CONFIG_ISA)
+/* Do we need a portlist for the ISA auto-probe ? */
+#define NEEDS_PORTLIST
+#endif
+
+/* A zero-terminated list of I/O addresses to be probed at boot. */
+#ifdef NEEDS_PORTLIST
+static unsigned int netcard_portlist[] __initdata = {
+	0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
+};
+#endif
+
+static struct isapnp_device_id isapnp_clone_list[] __initdata = {
+	{	ISAPNP_CARD_ID('A','X','E',0x2011),
+		ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
+		(long) "NetGear EA201" },
+	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+		ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
+		(long) "NN NE2000" },
+	{	ISAPNP_ANY_ID, ISAPNP_ANY_ID,
+		ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
+		(long) "Generic PNP" },
+	{ }	/* terminate list */
+};
+
+MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
+
+#ifdef SUPPORT_NE_BAD_CLONES
+/* A list of bad clones that we none-the-less recognize. */
+static struct { const char *name8, *name16; unsigned char SAprefix[4];}
+bad_clone_list[] __initdata = {
+    {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
+    {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
+    {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh?  */
+    {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
+    {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
+    {"NN1000", "NN2000",  {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
+    {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}},  /* Outlaw 4-Dimension cards. */
+    {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
+    {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
+    {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
+    {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
+    {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
+    {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
+#ifdef CONFIG_MACH_TX49XX
+    {"RBHMA4X00-RTL8019", "RBHMA4X00-RTL8019", {0x00, 0x60, 0x0a}},  /* Toshiba built-in */
+#endif
+    {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
+    {NULL,}
+};
+#endif
+
+/* ---- 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	0x1f	/* Issue a read to reset, a write to clear. */
+#define NE_IO_EXTENT	0x20
+
+#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 */
+
+#if defined(CONFIG_MACH_TX49XX)
+#  define DCR_VAL 0x48		/* 8-bit mode */
+#elif defined(CONFIG_ATARI)	/* 8-bit mode on Atari, normal on Q40 */
+#  define DCR_VAL (MACH_IS_ATARI ? 0x48 : 0x49)
+#else
+#  define DCR_VAL 0x49
+#endif
+
+static int ne_probe1(struct net_device *dev, unsigned long ioaddr);
+static int ne_probe_isapnp(struct net_device *dev);
+
+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);
+
+
+/*  Probe for various non-shared-memory ethercards.
+
+   NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
+   buffer memory space.  NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
+   the SAPROM, while other supposed NE2000 clones must be detected by their
+   SA prefix.
+
+   Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
+   mode results in doubled values, which can be detected and compensated for.
+
+   The probe is also responsible for initializing the card and filling
+   in the 'dev' and 'ei_status' structures.
+
+   We use the minimum memory size for some ethercard product lines, iff we can't
+   distinguish models.  You can increase the packet buffer size by setting
+   PACKETBUF_MEMSIZE.  Reported Cabletron packet buffer locations are:
+	E1010   starts at 0x100 and ends at 0x2000.
+	E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
+	E2010	 starts at 0x100 and ends at 0x4000.
+	E2010-x starts at 0x100 and ends at 0xffff.  */
+
+static int __init do_ne_probe(struct net_device *dev)
+{
+	unsigned long base_addr = dev->base_addr;
+#ifdef NEEDS_PORTLIST
+	int orig_irq = dev->irq;
+#endif
+
+	/* First check any supplied i/o locations. User knows best. <cough> */
+	if (base_addr > 0x1ff) {	/* Check a single specified location. */
+		int ret = ne_probe1(dev, base_addr);
+		if (ret)
+			netdev_warn(dev, "ne.c: No NE*000 card found at "
+				    "i/o = %#lx\n", base_addr);
+		return ret;
+	}
+	else if (base_addr != 0)	/* Don't probe at all. */
+		return -ENXIO;
+
+	/* Then look for any installed ISAPnP clones */
+	if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
+		return 0;
+
+#ifdef NEEDS_PORTLIST
+	/* Last resort. The semi-risky ISA auto-probe. */
+	for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
+		int ioaddr = netcard_portlist[base_addr];
+		dev->irq = orig_irq;
+		if (ne_probe1(dev, ioaddr) == 0)
+			return 0;
+	}
+#endif
+
+	return -ENODEV;
+}
+
+static int __init ne_probe_isapnp(struct net_device *dev)
+{
+	int i;
+
+	for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
+		struct pnp_dev *idev = NULL;
+
+		while ((idev = pnp_find_dev(NULL,
+					    isapnp_clone_list[i].vendor,
+					    isapnp_clone_list[i].function,
+					    idev))) {
+			/* Avoid already found cards from previous calls */
+			if (pnp_device_attach(idev) < 0)
+				continue;
+			if (pnp_activate_dev(idev) < 0) {
+			      	pnp_device_detach(idev);
+			      	continue;
+			}
+			/* if no io and irq, search for next */
+			if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
+				pnp_device_detach(idev);
+				continue;
+			}
+			/* found it */
+			dev->base_addr = pnp_port_start(idev, 0);
+			dev->irq = pnp_irq(idev, 0);
+			netdev_info(dev,
+				    "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
+				    (char *) isapnp_clone_list[i].driver_data,
+				    dev->base_addr, dev->irq);
+			if (ne_probe1(dev, dev->base_addr) != 0) {	/* Shouldn't happen. */
+				netdev_err(dev,
+					   "ne.c: Probe of ISAPnP card at %#lx failed.\n",
+					   dev->base_addr);
+				pnp_device_detach(idev);
+				return -ENXIO;
+			}
+			ei_status.priv = (unsigned long)idev;
+			break;
+		}
+		if (!idev)
+			continue;
+		return 0;
+	}
+
+	return -ENODEV;
+}
+
+static int __init ne_probe1(struct net_device *dev, unsigned long ioaddr)
+{
+	int i;
+	unsigned char SA_prom[32];
+	int wordlength = 2;
+	const char *name = NULL;
+	int start_page, stop_page;
+	int neX000, ctron, copam, bad_card;
+	int reg0, ret;
+	static unsigned version_printed;
+	struct ei_device *ei_local = netdev_priv(dev);
+
+	if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
+		return -EBUSY;
+
+	reg0 = inb_p(ioaddr);
+	if (reg0 == 0xFF) {
+		ret = -ENODEV;
+		goto err_out;
+	}
+
+	/* Do a preliminary verification that we have a 8390. */
+	{
+		int regd;
+		outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
+		regd = inb_p(ioaddr + 0x0d);
+		outb_p(0xff, ioaddr + 0x0d);
+		outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
+		inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
+		if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
+			outb_p(reg0, ioaddr);
+			outb_p(regd, ioaddr + 0x0d);	/* Restore the old values. */
+			ret = -ENODEV;
+			goto err_out;
+		}
+	}
+
+	if ((ne_msg_enable & NETIF_MSG_DRV) && (version_printed++ == 0))
+		netdev_info(dev, "%s%s", version1, version2);
+
+	netdev_info(dev, "NE*000 ethercard probe at %#3lx:", ioaddr);
+
+	/* A user with a poor card that fails to ack the reset, or that
+	   does not have a valid 0x57,0x57 signature can still use this
+	   without having to recompile. Specifying an i/o address along
+	   with an otherwise unused dev->mem_end value of "0xBAD" will
+	   cause the driver to skip these parts of the probe. */
+
+	bad_card = ((dev->base_addr != 0) && (dev->mem_end == BAD));
+
+	/* 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(ioaddr + NE_RESET), ioaddr + NE_RESET);
+
+		while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
+		if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
+			if (bad_card) {
+				pr_cont(" (warning: no reset ack)");
+				break;
+			} else {
+				pr_cont(" not found (no reset ack).\n");
+				ret = -ENODEV;
+				goto err_out;
+			}
+		}
+
+		outb_p(0xff, ioaddr + EN0_ISR);		/* Ack all intr. */
+	}
+
+	/* 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[] =
+		{
+			{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
+			{0x48,	EN0_DCFG},	/* Set byte-wide (0x48) 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, ioaddr + program_seq[i].offset);
+
+	}
+	for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
+		SA_prom[i] = inb(ioaddr + NE_DATAPORT);
+		SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
+		if (SA_prom[i] != SA_prom[i+1])
+			wordlength = 1;
+	}
+
+	if (wordlength == 2)
+	{
+		for (i = 0; i < 16; i++)
+			SA_prom[i] = SA_prom[i+i];
+		/* We must set the 8390 for word mode. */
+		outb_p(DCR_VAL, ioaddr + EN0_DCFG);
+		start_page = NESM_START_PG;
+
+		/*
+		 * Realtek RTL8019AS datasheet says that the PSTOP register
+		 * shouldn't exceed 0x60 in 8-bit mode.
+		 * This chip can be identified by reading the signature from
+		 * the  remote byte count registers (otherwise write-only)...
+		 */
+		if ((DCR_VAL & 0x01) == 0 &&		/* 8-bit mode */
+		    inb(ioaddr + EN0_RCNTLO) == 0x50 &&
+		    inb(ioaddr + EN0_RCNTHI) == 0x70)
+			stop_page = 0x60;
+		else
+			stop_page = NESM_STOP_PG;
+	} else {
+		start_page = NE1SM_START_PG;
+		stop_page  = NE1SM_STOP_PG;
+	}
+
+	neX000 = (SA_prom[14] == 0x57  &&  SA_prom[15] == 0x57);
+	ctron =  (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
+	copam =  (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
+
+	/* Set up the rest of the parameters. */
+	if (neX000 || bad_card || copam) {
+		name = (wordlength == 2) ? "NE2000" : "NE1000";
+	}
+	else if (ctron)
+	{
+		name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
+		start_page = 0x01;
+		stop_page = (wordlength == 2) ? 0x40 : 0x20;
+	}
+	else
+	{
+#ifdef SUPPORT_NE_BAD_CLONES
+		/* Ack!  Well, there might be a *bad* NE*000 clone there.
+		   Check for total bogus addresses. */
+		for (i = 0; bad_clone_list[i].name8; i++)
+		{
+			if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
+				SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
+				SA_prom[2] == bad_clone_list[i].SAprefix[2])
+			{
+				if (wordlength == 2)
+				{
+					name = bad_clone_list[i].name16;
+				} else {
+					name = bad_clone_list[i].name8;
+				}
+				break;
+			}
+		}
+		if (bad_clone_list[i].name8 == NULL)
+		{
+			pr_cont(" not found (invalid signature %2.2x %2.2x).\n",
+				SA_prom[14], SA_prom[15]);
+			ret = -ENXIO;
+			goto err_out;
+		}
+#else
+		pr_cont(" not found.\n");
+		ret = -ENXIO;
+		goto err_out;
+#endif
+	}
+
+	if (dev->irq < 2)
+	{
+		unsigned long cookie = probe_irq_on();
+		outb_p(0x50, ioaddr + EN0_IMR);	/* Enable one interrupt. */
+		outb_p(0x00, ioaddr + EN0_RCNTLO);
+		outb_p(0x00, ioaddr + EN0_RCNTHI);
+		outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
+		mdelay(10);		/* wait 10ms for interrupt to propagate */
+		outb_p(0x00, ioaddr + EN0_IMR); 		/* Mask it again. */
+		dev->irq = probe_irq_off(cookie);
+		if (ne_msg_enable & NETIF_MSG_PROBE)
+			pr_cont(" autoirq is %d", dev->irq);
+	} else if (dev->irq == 2)
+		/* Fixup for users that don't know that IRQ 2 is really IRQ 9,
+		   or don't know which one to set. */
+		dev->irq = 9;
+
+	if (! dev->irq) {
+		pr_cont(" failed to detect IRQ line.\n");
+		ret = -EAGAIN;
+		goto err_out;
+	}
+
+	/* Snarf the interrupt now.  There's no point in waiting since we cannot
+	   share and the board will usually be enabled. */
+	ret = request_irq(dev->irq, eip_interrupt, 0, name, dev);
+	if (ret) {
+		pr_cont(" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
+		goto err_out;
+	}
+
+	dev->base_addr = ioaddr;
+
+	for (i = 0; i < ETH_ALEN; i++) {
+		dev->dev_addr[i] = SA_prom[i];
+	}
+
+	pr_cont("%pM\n", dev->dev_addr);
+
+	ei_status.name = name;
+	ei_status.tx_start_page = start_page;
+	ei_status.stop_page = stop_page;
+
+	/* Use 16-bit mode only if this wasn't overridden by DCR_VAL */
+	ei_status.word16 = (wordlength == 2 && (DCR_VAL & 0x01));
+
+	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 = 0;
+
+	dev->netdev_ops = &eip_netdev_ops;
+	NS8390p_init(dev, 0);
+
+	ei_local->msg_enable = ne_msg_enable;
+	ret = register_netdev(dev);
+	if (ret)
+		goto out_irq;
+	netdev_info(dev, "%s found at %#lx, using IRQ %d.\n",
+		    name, ioaddr, dev->irq);
+	return 0;
+
+out_irq:
+	free_irq(dev->irq, dev);
+err_out:
+	release_region(ioaddr, NE_IO_EXTENT);
+	return ret;
+}
+
+/* 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;
+	struct ei_device *ei_local = netdev_priv(dev);
+
+	netif_dbg(ei_local, hw, dev, "resetting the 8390 t=%ld...\n", 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)) {
+			netdev_err(dev, "ne_reset_8390() did not complete.\n");
+			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)
+	{
+		netdev_err(dev, "DMAing conflict in ne_get_8390_hdr "
+			   "[DMAstat:%d][irqlock:%d].\n",
+			   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;
+
+	le16_to_cpus(&hdr->count);
+}
+
+/* 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;
+	struct ei_device *ei_local = netdev_priv(dev);
+#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)
+	{
+		netdev_err(dev, "DMAing conflict in ne_block_input "
+			   "[DMAstat:%d][irqlock:%d].\n",
+			   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 (netif_msg_rx_status(ei_local))
+	{
+		/* 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)
+			netdev_warn(dev, "RX transfer address mismatch,"
+				    "%#4.4x (expected) vs. %#4.4x (actual).\n",
+				    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;
+	struct ei_device *ei_local = netdev_priv(dev);
+#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)
+	{
+		netdev_err(dev, "DMAing conflict in ne_block_output."
+			   "[DMAstat:%d][irqlock:%d]\n",
+			   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. */
+	udelay(6);
+#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 (netif_msg_tx_queued(ei_local))
+	{
+		/* 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)
+		{
+			netdev_warn(dev, "Tx packet transfer address mismatch,"
+				    "%#4.4x (expected) vs. %#4.4x (actual).\n",
+				    (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 */
+			netdev_warn(dev, "timeout waiting for Tx RDC.\n");
+			ne_reset_8390(dev);
+			NS8390p_init(dev, 1);
+			break;
+		}
+
+	outb_p(ENISR_RDC, nic_base + EN0_ISR);	/* Ack intr. */
+	ei_status.dmaing &= ~0x01;
+}
+
+static int __init ne_drv_probe(struct platform_device *pdev)
+{
+	struct net_device *dev;
+	int err, this_dev = pdev->id;
+	struct resource *res;
+
+	dev = alloc_eip_netdev();
+	if (!dev)
+		return -ENOMEM;
+
+	/* ne.c doesn't populate resources in platform_device, but
+	 * rbtx4927_ne_init and rbtx4938_ne_init do register devices
+	 * with resources.
+	 */
+	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+	if (res) {
+		dev->base_addr = res->start;
+		dev->irq = platform_get_irq(pdev, 0);
+	} else {
+		if (this_dev < 0 || this_dev >= MAX_NE_CARDS) {
+			free_netdev(dev);
+			return -EINVAL;
+		}
+		dev->base_addr = io[this_dev];
+		dev->irq = irq[this_dev];
+		dev->mem_end = bad[this_dev];
+	}
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	err = do_ne_probe(dev);
+	if (err) {
+		free_netdev(dev);
+		return err;
+	}
+	platform_set_drvdata(pdev, dev);
+
+	/* Update with any values found by probing, don't update if
+	 * resources were specified.
+	 */
+	if (!res) {
+		io[this_dev] = dev->base_addr;
+		irq[this_dev] = dev->irq;
+	}
+	return 0;
+}
+
+static int ne_drv_remove(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+
+	if (dev) {
+		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
+		netif_device_detach(dev);
+		unregister_netdev(dev);
+		if (idev)
+			pnp_device_detach(idev);
+		/* Careful ne_drv_remove can be called twice, once from
+		 * the platform_driver.remove and again when the
+		 * platform_device is being removed.
+		 */
+		ei_status.priv = 0;
+		free_irq(dev->irq, dev);
+		release_region(dev->base_addr, NE_IO_EXTENT);
+		free_netdev(dev);
+	}
+	return 0;
+}
+
+/* Remove unused devices or all if true. */
+static void ne_loop_rm_unreg(int all)
+{
+	int this_dev;
+	struct platform_device *pdev;
+	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+		pdev = pdev_ne[this_dev];
+		/* No network device == unused */
+		if (pdev && (!platform_get_drvdata(pdev) || all)) {
+			ne_drv_remove(pdev);
+			platform_device_unregister(pdev);
+			pdev_ne[this_dev] = NULL;
+		}
+	}
+}
+
+#ifdef CONFIG_PM
+static int ne_drv_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+
+	if (netif_running(dev)) {
+		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
+		netif_device_detach(dev);
+		if (idev)
+			pnp_stop_dev(idev);
+	}
+	return 0;
+}
+
+static int ne_drv_resume(struct platform_device *pdev)
+{
+	struct net_device *dev = platform_get_drvdata(pdev);
+
+	if (netif_running(dev)) {
+		struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
+		if (idev)
+			pnp_start_dev(idev);
+		ne_reset_8390(dev);
+		NS8390p_init(dev, 1);
+		netif_device_attach(dev);
+	}
+	return 0;
+}
+#else
+#define ne_drv_suspend NULL
+#define ne_drv_resume NULL
+#endif
+
+static struct platform_driver ne_driver = {
+	.remove		= ne_drv_remove,
+	.suspend	= ne_drv_suspend,
+	.resume		= ne_drv_resume,
+	.driver		= {
+		.name	= DRV_NAME,
+	},
+};
+
+static void __init ne_add_devices(void)
+{
+	int this_dev;
+	struct platform_device *pdev;
+
+	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+		if (pdev_ne[this_dev])
+			continue;
+		pdev = platform_device_register_simple(
+			DRV_NAME, this_dev, NULL, 0);
+		if (IS_ERR(pdev))
+			continue;
+		pdev_ne[this_dev] = pdev;
+	}
+}
+
+#ifdef MODULE
+int __init init_module(void)
+{
+	int retval;
+	ne_add_devices();
+	retval = platform_driver_probe(&ne_driver, ne_drv_probe);
+	if (retval) {
+		if (io[0] == 0)
+			pr_notice("ne.c: You must supply \"io=0xNNN\""
+			       " value(s) for ISA cards.\n");
+		ne_loop_rm_unreg(1);
+		return retval;
+	}
+
+	/* Unregister unused platform_devices. */
+	ne_loop_rm_unreg(0);
+	return retval;
+}
+#else /* MODULE */
+static int __init ne_init(void)
+{
+	int retval = platform_driver_probe(&ne_driver, ne_drv_probe);
+
+	/* Unregister unused platform_devices. */
+	ne_loop_rm_unreg(0);
+	return retval;
+}
+module_init(ne_init);
+
+struct net_device * __init ne_probe(int unit)
+{
+	int this_dev;
+	struct net_device *dev;
+
+	/* Find an empty slot, that is no net_device and zero io port. */
+	this_dev = 0;
+	while ((pdev_ne[this_dev] && platform_get_drvdata(pdev_ne[this_dev])) ||
+		io[this_dev]) {
+		if (++this_dev == MAX_NE_CARDS)
+			return ERR_PTR(-ENOMEM);
+	}
+
+	/* Get irq, io from kernel command line */
+	dev = alloc_eip_netdev();
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	sprintf(dev->name, "eth%d", unit);
+	netdev_boot_setup_check(dev);
+
+	io[this_dev] = dev->base_addr;
+	irq[this_dev] = dev->irq;
+	bad[this_dev] = dev->mem_end;
+
+	free_netdev(dev);
+
+	ne_add_devices();
+
+	/* return the first device found */
+	for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
+		if (pdev_ne[this_dev]) {
+			dev = platform_get_drvdata(pdev_ne[this_dev]);
+			if (dev)
+				return dev;
+		}
+	}
+
+	return ERR_PTR(-ENODEV);
+}
+#endif /* MODULE */
+
+static void __exit ne_exit(void)
+{
+	platform_driver_unregister(&ne_driver);
+	ne_loop_rm_unreg(1);
+}
+module_exit(ne_exit);