Adding upstream version 5.10.209.upstream/5.10.209

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

1 files changed, 2197 insertions, 0 deletions

diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c b/drivers/net/ethernet/dec/tulip/de2104x.c
new file mode 100644
index 000000000..d9f6c1994
--- /dev/null
+++ b/drivers/net/ethernet/dec/tulip/de2104x.c
@@ -0,0 +1,2197 @@
+/* de2104x.c: A Linux PCI Ethernet driver for Intel/Digital 21040/1 chips. */
+/*
+	Copyright 2001,2003 Jeff Garzik <jgarzik@pobox.com>
+
+	Copyright 1994, 1995 Digital Equipment Corporation.	    [de4x5.c]
+	Written/copyright 1994-2001 by Donald Becker.		    [tulip.c]
+
+	This software may be used and distributed according to the terms of
+	the GNU General Public License (GPL), incorporated herein by reference.
+	Drivers based on or derived from this code fall under the GPL and must
+	retain the authorship, copyright and license notice.  This file is not
+	a complete program and may only be used when the entire operating
+	system is licensed under the GPL.
+
+	See the file COPYING in this distribution for more information.
+
+	TODO, in rough priority order:
+	* Support forcing media type with a module parameter,
+	  like dl2k.c/sundance.c
+	* Constants (module parms?) for Rx work limit
+	* Complete reset on PciErr
+	* Jumbo frames / dev->change_mtu
+	* Adjust Rx FIFO threshold and Max Rx DMA burst on Rx FIFO error
+	* Adjust Tx FIFO threshold and Max Tx DMA burst on Tx FIFO error
+	* Implement Tx software interrupt mitigation via
+	  Tx descriptor bit
+
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#define DRV_NAME		"de2104x"
+#define DRV_RELDATE		"Mar 17, 2004"
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/compiler.h>
+#include <linux/rtnetlink.h>
+#include <linux/crc32.h>
+#include <linux/slab.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/uaccess.h>
+#include <asm/unaligned.h>
+
+MODULE_AUTHOR("Jeff Garzik <jgarzik@pobox.com>");
+MODULE_DESCRIPTION("Intel/Digital 21040/1 series PCI Ethernet driver");
+MODULE_LICENSE("GPL");
+
+static int debug = -1;
+module_param (debug, int, 0);
+MODULE_PARM_DESC (debug, "de2104x bitmapped message enable number");
+
+/* Set the copy breakpoint for the copy-only-tiny-buffer Rx structure. */
+#if defined(__alpha__) || defined(__arm__) || defined(__hppa__) || \
+        defined(CONFIG_SPARC) || defined(__ia64__) ||		   \
+        defined(__sh__) || defined(__mips__)
+static int rx_copybreak = 1518;
+#else
+static int rx_copybreak = 100;
+#endif
+module_param (rx_copybreak, int, 0);
+MODULE_PARM_DESC (rx_copybreak, "de2104x Breakpoint at which Rx packets are copied");
+
+#define DE_DEF_MSG_ENABLE	(NETIF_MSG_DRV		| \
+				 NETIF_MSG_PROBE 	| \
+				 NETIF_MSG_LINK		| \
+				 NETIF_MSG_IFDOWN	| \
+				 NETIF_MSG_IFUP		| \
+				 NETIF_MSG_RX_ERR	| \
+				 NETIF_MSG_TX_ERR)
+
+/* Descriptor skip length in 32 bit longwords. */
+#ifndef CONFIG_DE2104X_DSL
+#define DSL			0
+#else
+#define DSL			CONFIG_DE2104X_DSL
+#endif
+
+#define DE_RX_RING_SIZE		128
+#define DE_TX_RING_SIZE		64
+#define DE_RING_BYTES		\
+		((sizeof(struct de_desc) * DE_RX_RING_SIZE) +	\
+		(sizeof(struct de_desc) * DE_TX_RING_SIZE))
+#define NEXT_TX(N)		(((N) + 1) & (DE_TX_RING_SIZE - 1))
+#define NEXT_RX(N)		(((N) + 1) & (DE_RX_RING_SIZE - 1))
+#define TX_BUFFS_AVAIL(CP)					\
+	(((CP)->tx_tail <= (CP)->tx_head) ?			\
+	  (CP)->tx_tail + (DE_TX_RING_SIZE - 1) - (CP)->tx_head :	\
+	  (CP)->tx_tail - (CP)->tx_head - 1)
+
+#define PKT_BUF_SZ		1536	/* Size of each temporary Rx buffer.*/
+#define RX_OFFSET		2
+
+#define DE_SETUP_SKB		((struct sk_buff *) 1)
+#define DE_DUMMY_SKB		((struct sk_buff *) 2)
+#define DE_SETUP_FRAME_WORDS	96
+#define DE_EEPROM_WORDS		256
+#define DE_EEPROM_SIZE		(DE_EEPROM_WORDS * sizeof(u16))
+#define DE_MAX_MEDIA		5
+
+#define DE_MEDIA_TP_AUTO	0
+#define DE_MEDIA_BNC		1
+#define DE_MEDIA_AUI		2
+#define DE_MEDIA_TP		3
+#define DE_MEDIA_TP_FD		4
+#define DE_MEDIA_INVALID	DE_MAX_MEDIA
+#define DE_MEDIA_FIRST		0
+#define DE_MEDIA_LAST		(DE_MAX_MEDIA - 1)
+#define DE_AUI_BNC		(SUPPORTED_AUI | SUPPORTED_BNC)
+
+#define DE_TIMER_LINK		(60 * HZ)
+#define DE_TIMER_NO_LINK	(5 * HZ)
+
+#define DE_NUM_REGS		16
+#define DE_REGS_SIZE		(DE_NUM_REGS * sizeof(u32))
+#define DE_REGS_VER		1
+
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT		(6*HZ)
+
+/* This is a mysterious value that can be written to CSR11 in the 21040 (only)
+   to support a pre-NWay full-duplex signaling mechanism using short frames.
+   No one knows what it should be, but if left at its default value some
+   10base2(!) packets trigger a full-duplex-request interrupt. */
+#define FULL_DUPLEX_MAGIC	0x6969
+
+enum {
+	/* NIC registers */
+	BusMode			= 0x00,
+	TxPoll			= 0x08,
+	RxPoll			= 0x10,
+	RxRingAddr		= 0x18,
+	TxRingAddr		= 0x20,
+	MacStatus		= 0x28,
+	MacMode			= 0x30,
+	IntrMask		= 0x38,
+	RxMissed		= 0x40,
+	ROMCmd			= 0x48,
+	CSR11			= 0x58,
+	SIAStatus		= 0x60,
+	CSR13			= 0x68,
+	CSR14			= 0x70,
+	CSR15			= 0x78,
+	PCIPM			= 0x40,
+
+	/* BusMode bits */
+	CmdReset		= (1 << 0),
+	CacheAlign16		= 0x00008000,
+	BurstLen4		= 0x00000400,
+	DescSkipLen		= (DSL << 2),
+
+	/* Rx/TxPoll bits */
+	NormalTxPoll		= (1 << 0),
+	NormalRxPoll		= (1 << 0),
+
+	/* Tx/Rx descriptor status bits */
+	DescOwn			= (1 << 31),
+	RxError			= (1 << 15),
+	RxErrLong		= (1 << 7),
+	RxErrCRC		= (1 << 1),
+	RxErrFIFO		= (1 << 0),
+	RxErrRunt		= (1 << 11),
+	RxErrFrame		= (1 << 14),
+	RingEnd			= (1 << 25),
+	FirstFrag		= (1 << 29),
+	LastFrag		= (1 << 30),
+	TxError			= (1 << 15),
+	TxFIFOUnder		= (1 << 1),
+	TxLinkFail		= (1 << 2) | (1 << 10) | (1 << 11),
+	TxMaxCol		= (1 << 8),
+	TxOWC			= (1 << 9),
+	TxJabber		= (1 << 14),
+	SetupFrame		= (1 << 27),
+	TxSwInt			= (1 << 31),
+
+	/* MacStatus bits */
+	IntrOK			= (1 << 16),
+	IntrErr			= (1 << 15),
+	RxIntr			= (1 << 6),
+	RxEmpty			= (1 << 7),
+	TxIntr			= (1 << 0),
+	TxEmpty			= (1 << 2),
+	PciErr			= (1 << 13),
+	TxState			= (1 << 22) | (1 << 21) | (1 << 20),
+	RxState			= (1 << 19) | (1 << 18) | (1 << 17),
+	LinkFail		= (1 << 12),
+	LinkPass		= (1 << 4),
+	RxStopped		= (1 << 8),
+	TxStopped		= (1 << 1),
+
+	/* MacMode bits */
+	TxEnable		= (1 << 13),
+	RxEnable		= (1 << 1),
+	RxTx			= TxEnable | RxEnable,
+	FullDuplex		= (1 << 9),
+	AcceptAllMulticast	= (1 << 7),
+	AcceptAllPhys		= (1 << 6),
+	BOCnt			= (1 << 5),
+	MacModeClear		= (1<<12) | (1<<11) | (1<<10) | (1<<8) | (1<<3) |
+				  RxTx | BOCnt | AcceptAllPhys | AcceptAllMulticast,
+
+	/* ROMCmd bits */
+	EE_SHIFT_CLK		= 0x02,	/* EEPROM shift clock. */
+	EE_CS			= 0x01,	/* EEPROM chip select. */
+	EE_DATA_WRITE		= 0x04,	/* Data from the Tulip to EEPROM. */
+	EE_WRITE_0		= 0x01,
+	EE_WRITE_1		= 0x05,
+	EE_DATA_READ		= 0x08,	/* Data from the EEPROM chip. */
+	EE_ENB			= (0x4800 | EE_CS),
+
+	/* The EEPROM commands include the alway-set leading bit. */
+	EE_READ_CMD		= 6,
+
+	/* RxMissed bits */
+	RxMissedOver		= (1 << 16),
+	RxMissedMask		= 0xffff,
+
+	/* SROM-related bits */
+	SROMC0InfoLeaf		= 27,
+	MediaBlockMask		= 0x3f,
+	MediaCustomCSRs		= (1 << 6),
+
+	/* PCIPM bits */
+	PM_Sleep		= (1 << 31),
+	PM_Snooze		= (1 << 30),
+	PM_Mask			= PM_Sleep | PM_Snooze,
+
+	/* SIAStatus bits */
+	NWayState		= (1 << 14) | (1 << 13) | (1 << 12),
+	NWayRestart		= (1 << 12),
+	NonselPortActive	= (1 << 9),
+	SelPortActive		= (1 << 8),
+	LinkFailStatus		= (1 << 2),
+	NetCxnErr		= (1 << 1),
+};
+
+static const u32 de_intr_mask =
+	IntrOK | IntrErr | RxIntr | RxEmpty | TxIntr | TxEmpty |
+	LinkPass | LinkFail | PciErr;
+
+/*
+ * Set the programmable burst length to 4 longwords for all:
+ * DMA errors result without these values. Cache align 16 long.
+ */
+static const u32 de_bus_mode = CacheAlign16 | BurstLen4 | DescSkipLen;
+
+struct de_srom_media_block {
+	u8			opts;
+	u16			csr13;
+	u16			csr14;
+	u16			csr15;
+} __packed;
+
+struct de_srom_info_leaf {
+	u16			default_media;
+	u8			n_blocks;
+	u8			unused;
+} __packed;
+
+struct de_desc {
+	__le32			opts1;
+	__le32			opts2;
+	__le32			addr1;
+	__le32			addr2;
+#if DSL
+	__le32			skip[DSL];
+#endif
+};
+
+struct media_info {
+	u16			type;	/* DE_MEDIA_xxx */
+	u16			csr13;
+	u16			csr14;
+	u16			csr15;
+};
+
+struct ring_info {
+	struct sk_buff		*skb;
+	dma_addr_t		mapping;
+};
+
+struct de_private {
+	unsigned		tx_head;
+	unsigned		tx_tail;
+	unsigned		rx_tail;
+
+	void			__iomem *regs;
+	struct net_device	*dev;
+	spinlock_t		lock;
+
+	struct de_desc		*rx_ring;
+	struct de_desc		*tx_ring;
+	struct ring_info	tx_skb[DE_TX_RING_SIZE];
+	struct ring_info	rx_skb[DE_RX_RING_SIZE];
+	unsigned		rx_buf_sz;
+	dma_addr_t		ring_dma;
+
+	u32			msg_enable;
+
+	struct pci_dev		*pdev;
+
+	u16			setup_frame[DE_SETUP_FRAME_WORDS];
+
+	u32			media_type;
+	u32			media_supported;
+	u32			media_advertise;
+	struct media_info	media[DE_MAX_MEDIA];
+	struct timer_list	media_timer;
+
+	u8			*ee_data;
+	unsigned		board_idx;
+	unsigned		de21040 : 1;
+	unsigned		media_lock : 1;
+};
+
+
+static void de_set_rx_mode (struct net_device *dev);
+static void de_tx (struct de_private *de);
+static void de_clean_rings (struct de_private *de);
+static void de_media_interrupt (struct de_private *de, u32 status);
+static void de21040_media_timer (struct timer_list *t);
+static void de21041_media_timer (struct timer_list *t);
+static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media);
+
+
+static const struct pci_device_id de_pci_tbl[] = {
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_PLUS,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, 1 },
+	{ },
+};
+MODULE_DEVICE_TABLE(pci, de_pci_tbl);
+
+static const char * const media_name[DE_MAX_MEDIA] = {
+	"10baseT auto",
+	"BNC",
+	"AUI",
+	"10baseT-HD",
+	"10baseT-FD"
+};
+
+/* 21040 transceiver register settings:
+ * TP AUTO(unused), BNC(unused), AUI, TP, TP FD*/
+static u16 t21040_csr13[] = { 0, 0, 0x8F09, 0x8F01, 0x8F01, };
+static u16 t21040_csr14[] = { 0, 0, 0x0705, 0xFFFF, 0xFFFD, };
+static u16 t21040_csr15[] = { 0, 0, 0x0006, 0x0000, 0x0000, };
+
+/* 21041 transceiver register settings: TP AUTO, BNC, AUI, TP, TP FD*/
+static u16 t21041_csr13[] = { 0xEF01, 0xEF09, 0xEF09, 0xEF01, 0xEF09, };
+static u16 t21041_csr14[] = { 0xFFFF, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, };
+/* If on-chip autonegotiation is broken, use half-duplex (FF3F) instead */
+static u16 t21041_csr14_brk[] = { 0xFF3F, 0xF7FD, 0xF7FD, 0x7F3F, 0x7F3D, };
+static u16 t21041_csr15[] = { 0x0008, 0x0006, 0x000E, 0x0008, 0x0008, };
+
+
+#define dr32(reg)	ioread32(de->regs + (reg))
+#define dw32(reg, val)	iowrite32((val), de->regs + (reg))
+
+
+static void de_rx_err_acct (struct de_private *de, unsigned rx_tail,
+			    u32 status, u32 len)
+{
+	netif_dbg(de, rx_err, de->dev,
+		  "rx err, slot %d status 0x%x len %d\n",
+		  rx_tail, status, len);
+
+	if ((status & 0x38000300) != 0x0300) {
+		/* Ingore earlier buffers. */
+		if ((status & 0xffff) != 0x7fff) {
+			netif_warn(de, rx_err, de->dev,
+				   "Oversized Ethernet frame spanned multiple buffers, status %08x!\n",
+				   status);
+			de->dev->stats.rx_length_errors++;
+		}
+	} else if (status & RxError) {
+		/* There was a fatal error. */
+		de->dev->stats.rx_errors++; /* end of a packet.*/
+		if (status & 0x0890) de->dev->stats.rx_length_errors++;
+		if (status & RxErrCRC) de->dev->stats.rx_crc_errors++;
+		if (status & RxErrFIFO) de->dev->stats.rx_fifo_errors++;
+	}
+}
+
+static void de_rx (struct de_private *de)
+{
+	unsigned rx_tail = de->rx_tail;
+	unsigned rx_work = DE_RX_RING_SIZE;
+	unsigned drop = 0;
+	int rc;
+
+	while (--rx_work) {
+		u32 status, len;
+		dma_addr_t mapping;
+		struct sk_buff *skb, *copy_skb;
+		unsigned copying_skb, buflen;
+
+		skb = de->rx_skb[rx_tail].skb;
+		BUG_ON(!skb);
+		rmb();
+		status = le32_to_cpu(de->rx_ring[rx_tail].opts1);
+		if (status & DescOwn)
+			break;
+
+		/* the length is actually a 15 bit value here according
+		 * to Table 4-1 in the DE2104x spec so mask is 0x7fff
+		 */
+		len = ((status >> 16) & 0x7fff) - 4;
+		mapping = de->rx_skb[rx_tail].mapping;
+
+		if (unlikely(drop)) {
+			de->dev->stats.rx_dropped++;
+			goto rx_next;
+		}
+
+		if (unlikely((status & 0x38008300) != 0x0300)) {
+			de_rx_err_acct(de, rx_tail, status, len);
+			goto rx_next;
+		}
+
+		copying_skb = (len <= rx_copybreak);
+
+		netif_dbg(de, rx_status, de->dev,
+			  "rx slot %d status 0x%x len %d copying? %d\n",
+			  rx_tail, status, len, copying_skb);
+
+		buflen = copying_skb ? (len + RX_OFFSET) : de->rx_buf_sz;
+		copy_skb = netdev_alloc_skb(de->dev, buflen);
+		if (unlikely(!copy_skb)) {
+			de->dev->stats.rx_dropped++;
+			drop = 1;
+			rx_work = 100;
+			goto rx_next;
+		}
+
+		if (!copying_skb) {
+			dma_unmap_single(&de->pdev->dev, mapping, buflen,
+					 DMA_FROM_DEVICE);
+			skb_put(skb, len);
+
+			mapping =
+			de->rx_skb[rx_tail].mapping =
+				dma_map_single(&de->pdev->dev, copy_skb->data,
+					       buflen, DMA_FROM_DEVICE);
+			de->rx_skb[rx_tail].skb = copy_skb;
+		} else {
+			dma_sync_single_for_cpu(&de->pdev->dev, mapping, len,
+						DMA_FROM_DEVICE);
+			skb_reserve(copy_skb, RX_OFFSET);
+			skb_copy_from_linear_data(skb, skb_put(copy_skb, len),
+						  len);
+			dma_sync_single_for_device(&de->pdev->dev, mapping,
+						   len, DMA_FROM_DEVICE);
+
+			/* We'll reuse the original ring buffer. */
+			skb = copy_skb;
+		}
+
+		skb->protocol = eth_type_trans (skb, de->dev);
+
+		de->dev->stats.rx_packets++;
+		de->dev->stats.rx_bytes += skb->len;
+		rc = netif_rx (skb);
+		if (rc == NET_RX_DROP)
+			drop = 1;
+
+rx_next:
+		if (rx_tail == (DE_RX_RING_SIZE - 1))
+			de->rx_ring[rx_tail].opts2 =
+				cpu_to_le32(RingEnd | de->rx_buf_sz);
+		else
+			de->rx_ring[rx_tail].opts2 = cpu_to_le32(de->rx_buf_sz);
+		de->rx_ring[rx_tail].addr1 = cpu_to_le32(mapping);
+		wmb();
+		de->rx_ring[rx_tail].opts1 = cpu_to_le32(DescOwn);
+		rx_tail = NEXT_RX(rx_tail);
+	}
+
+	if (!rx_work)
+		netdev_warn(de->dev, "rx work limit reached\n");
+
+	de->rx_tail = rx_tail;
+}
+
+static irqreturn_t de_interrupt (int irq, void *dev_instance)
+{
+	struct net_device *dev = dev_instance;
+	struct de_private *de = netdev_priv(dev);
+	u32 status;
+
+	status = dr32(MacStatus);
+	if ((!(status & (IntrOK|IntrErr))) || (status == 0xFFFF))
+		return IRQ_NONE;
+
+	netif_dbg(de, intr, dev, "intr, status %08x mode %08x desc %u/%u/%u\n",
+		  status, dr32(MacMode),
+		  de->rx_tail, de->tx_head, de->tx_tail);
+
+	dw32(MacStatus, status);
+
+	if (status & (RxIntr | RxEmpty)) {
+		de_rx(de);
+		if (status & RxEmpty)
+			dw32(RxPoll, NormalRxPoll);
+	}
+
+	spin_lock(&de->lock);
+
+	if (status & (TxIntr | TxEmpty))
+		de_tx(de);
+
+	if (status & (LinkPass | LinkFail))
+		de_media_interrupt(de, status);
+
+	spin_unlock(&de->lock);
+
+	if (status & PciErr) {
+		u16 pci_status;
+
+		pci_read_config_word(de->pdev, PCI_STATUS, &pci_status);
+		pci_write_config_word(de->pdev, PCI_STATUS, pci_status);
+		netdev_err(de->dev,
+			   "PCI bus error, status=%08x, PCI status=%04x\n",
+			   status, pci_status);
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void de_tx (struct de_private *de)
+{
+	unsigned tx_head = de->tx_head;
+	unsigned tx_tail = de->tx_tail;
+
+	while (tx_tail != tx_head) {
+		struct sk_buff *skb;
+		u32 status;
+
+		rmb();
+		status = le32_to_cpu(de->tx_ring[tx_tail].opts1);
+		if (status & DescOwn)
+			break;
+
+		skb = de->tx_skb[tx_tail].skb;
+		BUG_ON(!skb);
+		if (unlikely(skb == DE_DUMMY_SKB))
+			goto next;
+
+		if (unlikely(skb == DE_SETUP_SKB)) {
+			dma_unmap_single(&de->pdev->dev,
+					 de->tx_skb[tx_tail].mapping,
+					 sizeof(de->setup_frame),
+					 DMA_TO_DEVICE);
+			goto next;
+		}
+
+		dma_unmap_single(&de->pdev->dev, de->tx_skb[tx_tail].mapping,
+				 skb->len, DMA_TO_DEVICE);
+
+		if (status & LastFrag) {
+			if (status & TxError) {
+				netif_dbg(de, tx_err, de->dev,
+					  "tx err, status 0x%x\n",
+					  status);
+				de->dev->stats.tx_errors++;
+				if (status & TxOWC)
+					de->dev->stats.tx_window_errors++;
+				if (status & TxMaxCol)
+					de->dev->stats.tx_aborted_errors++;
+				if (status & TxLinkFail)
+					de->dev->stats.tx_carrier_errors++;
+				if (status & TxFIFOUnder)
+					de->dev->stats.tx_fifo_errors++;
+			} else {
+				de->dev->stats.tx_packets++;
+				de->dev->stats.tx_bytes += skb->len;
+				netif_dbg(de, tx_done, de->dev,
+					  "tx done, slot %d\n", tx_tail);
+			}
+			dev_consume_skb_irq(skb);
+		}
+
+next:
+		de->tx_skb[tx_tail].skb = NULL;
+
+		tx_tail = NEXT_TX(tx_tail);
+	}
+
+	de->tx_tail = tx_tail;
+
+	if (netif_queue_stopped(de->dev) && (TX_BUFFS_AVAIL(de) > (DE_TX_RING_SIZE / 4)))
+		netif_wake_queue(de->dev);
+}
+
+static netdev_tx_t de_start_xmit (struct sk_buff *skb,
+					struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	unsigned int entry, tx_free;
+	u32 mapping, len, flags = FirstFrag | LastFrag;
+	struct de_desc *txd;
+
+	spin_lock_irq(&de->lock);
+
+	tx_free = TX_BUFFS_AVAIL(de);
+	if (tx_free == 0) {
+		netif_stop_queue(dev);
+		spin_unlock_irq(&de->lock);
+		return NETDEV_TX_BUSY;
+	}
+	tx_free--;
+
+	entry = de->tx_head;
+
+	txd = &de->tx_ring[entry];
+
+	len = skb->len;
+	mapping = dma_map_single(&de->pdev->dev, skb->data, len,
+				 DMA_TO_DEVICE);
+	if (entry == (DE_TX_RING_SIZE - 1))
+		flags |= RingEnd;
+	if (!tx_free || (tx_free == (DE_TX_RING_SIZE / 2)))
+		flags |= TxSwInt;
+	flags |= len;
+	txd->opts2 = cpu_to_le32(flags);
+	txd->addr1 = cpu_to_le32(mapping);
+
+	de->tx_skb[entry].skb = skb;
+	de->tx_skb[entry].mapping = mapping;
+	wmb();
+
+	txd->opts1 = cpu_to_le32(DescOwn);
+	wmb();
+
+	de->tx_head = NEXT_TX(entry);
+	netif_dbg(de, tx_queued, dev, "tx queued, slot %d, skblen %d\n",
+		  entry, skb->len);
+
+	if (tx_free == 0)
+		netif_stop_queue(dev);
+
+	spin_unlock_irq(&de->lock);
+
+	/* Trigger an immediate transmit demand. */
+	dw32(TxPoll, NormalTxPoll);
+
+	return NETDEV_TX_OK;
+}
+
+/* Set or clear the multicast filter for this adaptor.
+   Note that we only use exclusion around actually queueing the
+   new frame, not around filling de->setup_frame.  This is non-deterministic
+   when re-entered but still correct. */
+
+static void build_setup_frame_hash(u16 *setup_frm, struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	u16 hash_table[32];
+	struct netdev_hw_addr *ha;
+	int i;
+	u16 *eaddrs;
+
+	memset(hash_table, 0, sizeof(hash_table));
+	__set_bit_le(255, hash_table);			/* Broadcast entry */
+	/* This should work on big-endian machines as well. */
+	netdev_for_each_mc_addr(ha, dev) {
+		int index = ether_crc_le(ETH_ALEN, ha->addr) & 0x1ff;
+
+		__set_bit_le(index, hash_table);
+	}
+
+	for (i = 0; i < 32; i++) {
+		*setup_frm++ = hash_table[i];
+		*setup_frm++ = hash_table[i];
+	}
+	setup_frm = &de->setup_frame[13*6];
+
+	/* Fill the final entry with our physical address. */
+	eaddrs = (u16 *)dev->dev_addr;
+	*setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0];
+	*setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1];
+	*setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2];
+}
+
+static void build_setup_frame_perfect(u16 *setup_frm, struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	struct netdev_hw_addr *ha;
+	u16 *eaddrs;
+
+	/* We have <= 14 addresses so we can use the wonderful
+	   16 address perfect filtering of the Tulip. */
+	netdev_for_each_mc_addr(ha, dev) {
+		eaddrs = (u16 *) ha->addr;
+		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
+		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
+		*setup_frm++ = *eaddrs; *setup_frm++ = *eaddrs++;
+	}
+	/* Fill the unused entries with the broadcast address. */
+	memset(setup_frm, 0xff, (15 - netdev_mc_count(dev)) * 12);
+	setup_frm = &de->setup_frame[15*6];
+
+	/* Fill the final entry with our physical address. */
+	eaddrs = (u16 *)dev->dev_addr;
+	*setup_frm++ = eaddrs[0]; *setup_frm++ = eaddrs[0];
+	*setup_frm++ = eaddrs[1]; *setup_frm++ = eaddrs[1];
+	*setup_frm++ = eaddrs[2]; *setup_frm++ = eaddrs[2];
+}
+
+
+static void __de_set_rx_mode (struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	u32 macmode;
+	unsigned int entry;
+	u32 mapping;
+	struct de_desc *txd;
+	struct de_desc *dummy_txd = NULL;
+
+	macmode = dr32(MacMode) & ~(AcceptAllMulticast | AcceptAllPhys);
+
+	if (dev->flags & IFF_PROMISC) {	/* Set promiscuous. */
+		macmode |= AcceptAllMulticast | AcceptAllPhys;
+		goto out;
+	}
+
+	if ((netdev_mc_count(dev) > 1000) || (dev->flags & IFF_ALLMULTI)) {
+		/* Too many to filter well -- accept all multicasts. */
+		macmode |= AcceptAllMulticast;
+		goto out;
+	}
+
+	/* Note that only the low-address shortword of setup_frame is valid!
+	   The values are doubled for big-endian architectures. */
+	if (netdev_mc_count(dev) > 14)	/* Must use a multicast hash table. */
+		build_setup_frame_hash (de->setup_frame, dev);
+	else
+		build_setup_frame_perfect (de->setup_frame, dev);
+
+	/*
+	 * Now add this frame to the Tx list.
+	 */
+
+	entry = de->tx_head;
+
+	/* Avoid a chip errata by prefixing a dummy entry. */
+	if (entry != 0) {
+		de->tx_skb[entry].skb = DE_DUMMY_SKB;
+
+		dummy_txd = &de->tx_ring[entry];
+		dummy_txd->opts2 = (entry == (DE_TX_RING_SIZE - 1)) ?
+				   cpu_to_le32(RingEnd) : 0;
+		dummy_txd->addr1 = 0;
+
+		/* Must set DescOwned later to avoid race with chip */
+
+		entry = NEXT_TX(entry);
+	}
+
+	de->tx_skb[entry].skb = DE_SETUP_SKB;
+	de->tx_skb[entry].mapping = mapping =
+	    dma_map_single(&de->pdev->dev, de->setup_frame,
+			   sizeof(de->setup_frame), DMA_TO_DEVICE);
+
+	/* Put the setup frame on the Tx list. */
+	txd = &de->tx_ring[entry];
+	if (entry == (DE_TX_RING_SIZE - 1))
+		txd->opts2 = cpu_to_le32(SetupFrame | RingEnd | sizeof (de->setup_frame));
+	else
+		txd->opts2 = cpu_to_le32(SetupFrame | sizeof (de->setup_frame));
+	txd->addr1 = cpu_to_le32(mapping);
+	wmb();
+
+	txd->opts1 = cpu_to_le32(DescOwn);
+	wmb();
+
+	if (dummy_txd) {
+		dummy_txd->opts1 = cpu_to_le32(DescOwn);
+		wmb();
+	}
+
+	de->tx_head = NEXT_TX(entry);
+
+	if (TX_BUFFS_AVAIL(de) == 0)
+		netif_stop_queue(dev);
+
+	/* Trigger an immediate transmit demand. */
+	dw32(TxPoll, NormalTxPoll);
+
+out:
+	if (macmode != dr32(MacMode))
+		dw32(MacMode, macmode);
+}
+
+static void de_set_rx_mode (struct net_device *dev)
+{
+	unsigned long flags;
+	struct de_private *de = netdev_priv(dev);
+
+	spin_lock_irqsave (&de->lock, flags);
+	__de_set_rx_mode(dev);
+	spin_unlock_irqrestore (&de->lock, flags);
+}
+
+static inline void de_rx_missed(struct de_private *de, u32 rx_missed)
+{
+	if (unlikely(rx_missed & RxMissedOver))
+		de->dev->stats.rx_missed_errors += RxMissedMask;
+	else
+		de->dev->stats.rx_missed_errors += (rx_missed & RxMissedMask);
+}
+
+static void __de_get_stats(struct de_private *de)
+{
+	u32 tmp = dr32(RxMissed); /* self-clearing */
+
+	de_rx_missed(de, tmp);
+}
+
+static struct net_device_stats *de_get_stats(struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	/* The chip only need report frame silently dropped. */
+	spin_lock_irq(&de->lock);
+ 	if (netif_running(dev) && netif_device_present(dev))
+ 		__de_get_stats(de);
+	spin_unlock_irq(&de->lock);
+
+	return &dev->stats;
+}
+
+static inline int de_is_running (struct de_private *de)
+{
+	return (dr32(MacStatus) & (RxState | TxState)) ? 1 : 0;
+}
+
+static void de_stop_rxtx (struct de_private *de)
+{
+	u32 macmode;
+	unsigned int i = 1300/100;
+
+	macmode = dr32(MacMode);
+	if (macmode & RxTx) {
+		dw32(MacMode, macmode & ~RxTx);
+		dr32(MacMode);
+	}
+
+	/* wait until in-flight frame completes.
+	 * Max time @ 10BT: 1500*8b/10Mbps == 1200us (+ 100us margin)
+	 * Typically expect this loop to end in < 50 us on 100BT.
+	 */
+	while (--i) {
+		if (!de_is_running(de))
+			return;
+		udelay(100);
+	}
+
+	netdev_warn(de->dev, "timeout expired, stopping DMA\n");
+}
+
+static inline void de_start_rxtx (struct de_private *de)
+{
+	u32 macmode;
+
+	macmode = dr32(MacMode);
+	if ((macmode & RxTx) != RxTx) {
+		dw32(MacMode, macmode | RxTx);
+		dr32(MacMode);
+	}
+}
+
+static void de_stop_hw (struct de_private *de)
+{
+
+	udelay(5);
+	dw32(IntrMask, 0);
+
+	de_stop_rxtx(de);
+
+	dw32(MacStatus, dr32(MacStatus));
+
+	udelay(10);
+
+	de->rx_tail = 0;
+	de->tx_head = de->tx_tail = 0;
+}
+
+static void de_link_up(struct de_private *de)
+{
+	if (!netif_carrier_ok(de->dev)) {
+		netif_carrier_on(de->dev);
+		netif_info(de, link, de->dev, "link up, media %s\n",
+			   media_name[de->media_type]);
+	}
+}
+
+static void de_link_down(struct de_private *de)
+{
+	if (netif_carrier_ok(de->dev)) {
+		netif_carrier_off(de->dev);
+		netif_info(de, link, de->dev, "link down\n");
+	}
+}
+
+static void de_set_media (struct de_private *de)
+{
+	unsigned media = de->media_type;
+	u32 macmode = dr32(MacMode);
+
+	if (de_is_running(de))
+		netdev_warn(de->dev, "chip is running while changing media!\n");
+
+	if (de->de21040)
+		dw32(CSR11, FULL_DUPLEX_MAGIC);
+	dw32(CSR13, 0); /* Reset phy */
+	dw32(CSR14, de->media[media].csr14);
+	dw32(CSR15, de->media[media].csr15);
+	dw32(CSR13, de->media[media].csr13);
+
+	/* must delay 10ms before writing to other registers,
+	 * especially CSR6
+	 */
+	mdelay(10);
+
+	if (media == DE_MEDIA_TP_FD)
+		macmode |= FullDuplex;
+	else
+		macmode &= ~FullDuplex;
+
+	netif_info(de, link, de->dev, "set link %s\n", media_name[media]);
+	netif_info(de, hw, de->dev, "mode 0x%x, sia 0x%x,0x%x,0x%x,0x%x\n",
+		   dr32(MacMode), dr32(SIAStatus),
+		   dr32(CSR13), dr32(CSR14), dr32(CSR15));
+	netif_info(de, hw, de->dev, "set mode 0x%x, set sia 0x%x,0x%x,0x%x\n",
+		   macmode, de->media[media].csr13,
+		   de->media[media].csr14, de->media[media].csr15);
+	if (macmode != dr32(MacMode))
+		dw32(MacMode, macmode);
+}
+
+static void de_next_media (struct de_private *de, const u32 *media,
+			   unsigned int n_media)
+{
+	unsigned int i;
+
+	for (i = 0; i < n_media; i++) {
+		if (de_ok_to_advertise(de, media[i])) {
+			de->media_type = media[i];
+			return;
+		}
+	}
+}
+
+static void de21040_media_timer (struct timer_list *t)
+{
+	struct de_private *de = from_timer(de, t, media_timer);
+	struct net_device *dev = de->dev;
+	u32 status = dr32(SIAStatus);
+	unsigned int carrier;
+	unsigned long flags;
+
+	carrier = (status & NetCxnErr) ? 0 : 1;
+
+	if (carrier) {
+		if (de->media_type != DE_MEDIA_AUI && (status & LinkFailStatus))
+			goto no_link_yet;
+
+		de->media_timer.expires = jiffies + DE_TIMER_LINK;
+		add_timer(&de->media_timer);
+		if (!netif_carrier_ok(dev))
+			de_link_up(de);
+		else
+			netif_info(de, timer, dev, "%s link ok, status %x\n",
+				   media_name[de->media_type], status);
+		return;
+	}
+
+	de_link_down(de);
+
+	if (de->media_lock)
+		return;
+
+	if (de->media_type == DE_MEDIA_AUI) {
+		static const u32 next_state = DE_MEDIA_TP;
+		de_next_media(de, &next_state, 1);
+	} else {
+		static const u32 next_state = DE_MEDIA_AUI;
+		de_next_media(de, &next_state, 1);
+	}
+
+	spin_lock_irqsave(&de->lock, flags);
+	de_stop_rxtx(de);
+	spin_unlock_irqrestore(&de->lock, flags);
+	de_set_media(de);
+	de_start_rxtx(de);
+
+no_link_yet:
+	de->media_timer.expires = jiffies + DE_TIMER_NO_LINK;
+	add_timer(&de->media_timer);
+
+	netif_info(de, timer, dev, "no link, trying media %s, status %x\n",
+		   media_name[de->media_type], status);
+}
+
+static unsigned int de_ok_to_advertise (struct de_private *de, u32 new_media)
+{
+	switch (new_media) {
+	case DE_MEDIA_TP_AUTO:
+		if (!(de->media_advertise & ADVERTISED_Autoneg))
+			return 0;
+		if (!(de->media_advertise & (ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full)))
+			return 0;
+		break;
+	case DE_MEDIA_BNC:
+		if (!(de->media_advertise & ADVERTISED_BNC))
+			return 0;
+		break;
+	case DE_MEDIA_AUI:
+		if (!(de->media_advertise & ADVERTISED_AUI))
+			return 0;
+		break;
+	case DE_MEDIA_TP:
+		if (!(de->media_advertise & ADVERTISED_10baseT_Half))
+			return 0;
+		break;
+	case DE_MEDIA_TP_FD:
+		if (!(de->media_advertise & ADVERTISED_10baseT_Full))
+			return 0;
+		break;
+	}
+
+	return 1;
+}
+
+static void de21041_media_timer (struct timer_list *t)
+{
+	struct de_private *de = from_timer(de, t, media_timer);
+	struct net_device *dev = de->dev;
+	u32 status = dr32(SIAStatus);
+	unsigned int carrier;
+	unsigned long flags;
+
+	/* clear port active bits */
+	dw32(SIAStatus, NonselPortActive | SelPortActive);
+
+	carrier = (status & NetCxnErr) ? 0 : 1;
+
+	if (carrier) {
+		if ((de->media_type == DE_MEDIA_TP_AUTO ||
+		     de->media_type == DE_MEDIA_TP ||
+		     de->media_type == DE_MEDIA_TP_FD) &&
+		    (status & LinkFailStatus))
+			goto no_link_yet;
+
+		de->media_timer.expires = jiffies + DE_TIMER_LINK;
+		add_timer(&de->media_timer);
+		if (!netif_carrier_ok(dev))
+			de_link_up(de);
+		else
+			netif_info(de, timer, dev,
+				   "%s link ok, mode %x status %x\n",
+				   media_name[de->media_type],
+				   dr32(MacMode), status);
+		return;
+	}
+
+	de_link_down(de);
+
+	/* if media type locked, don't switch media */
+	if (de->media_lock)
+		goto set_media;
+
+	/* if activity detected, use that as hint for new media type */
+	if (status & NonselPortActive) {
+		unsigned int have_media = 1;
+
+		/* if AUI/BNC selected, then activity is on TP port */
+		if (de->media_type == DE_MEDIA_AUI ||
+		    de->media_type == DE_MEDIA_BNC) {
+			if (de_ok_to_advertise(de, DE_MEDIA_TP_AUTO))
+				de->media_type = DE_MEDIA_TP_AUTO;
+			else
+				have_media = 0;
+		}
+
+		/* TP selected.  If there is only TP and BNC, then it's BNC */
+		else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_BNC) &&
+			 de_ok_to_advertise(de, DE_MEDIA_BNC))
+			de->media_type = DE_MEDIA_BNC;
+
+		/* TP selected.  If there is only TP and AUI, then it's AUI */
+		else if (((de->media_supported & DE_AUI_BNC) == SUPPORTED_AUI) &&
+			 de_ok_to_advertise(de, DE_MEDIA_AUI))
+			de->media_type = DE_MEDIA_AUI;
+
+		/* otherwise, ignore the hint */
+		else
+			have_media = 0;
+
+		if (have_media)
+			goto set_media;
+	}
+
+	/*
+	 * Absent or ambiguous activity hint, move to next advertised
+	 * media state.  If de->media_type is left unchanged, this
+	 * simply resets the PHY and reloads the current media settings.
+	 */
+	if (de->media_type == DE_MEDIA_AUI) {
+		static const u32 next_states[] = {
+			DE_MEDIA_BNC, DE_MEDIA_TP_AUTO
+		};
+		de_next_media(de, next_states, ARRAY_SIZE(next_states));
+	} else if (de->media_type == DE_MEDIA_BNC) {
+		static const u32 next_states[] = {
+			DE_MEDIA_TP_AUTO, DE_MEDIA_AUI
+		};
+		de_next_media(de, next_states, ARRAY_SIZE(next_states));
+	} else {
+		static const u32 next_states[] = {
+			DE_MEDIA_AUI, DE_MEDIA_BNC, DE_MEDIA_TP_AUTO
+		};
+		de_next_media(de, next_states, ARRAY_SIZE(next_states));
+	}
+
+set_media:
+	spin_lock_irqsave(&de->lock, flags);
+	de_stop_rxtx(de);
+	spin_unlock_irqrestore(&de->lock, flags);
+	de_set_media(de);
+	de_start_rxtx(de);
+
+no_link_yet:
+	de->media_timer.expires = jiffies + DE_TIMER_NO_LINK;
+	add_timer(&de->media_timer);
+
+	netif_info(de, timer, dev, "no link, trying media %s, status %x\n",
+		   media_name[de->media_type], status);
+}
+
+static void de_media_interrupt (struct de_private *de, u32 status)
+{
+	if (status & LinkPass) {
+		/* Ignore if current media is AUI or BNC and we can't use TP */
+		if ((de->media_type == DE_MEDIA_AUI ||
+		     de->media_type == DE_MEDIA_BNC) &&
+		    (de->media_lock ||
+		     !de_ok_to_advertise(de, DE_MEDIA_TP_AUTO)))
+			return;
+		/* If current media is not TP, change it to TP */
+		if ((de->media_type == DE_MEDIA_AUI ||
+		     de->media_type == DE_MEDIA_BNC)) {
+			de->media_type = DE_MEDIA_TP_AUTO;
+			de_stop_rxtx(de);
+			de_set_media(de);
+			de_start_rxtx(de);
+		}
+		de_link_up(de);
+		mod_timer(&de->media_timer, jiffies + DE_TIMER_LINK);
+		return;
+	}
+
+	BUG_ON(!(status & LinkFail));
+	/* Mark the link as down only if current media is TP */
+	if (netif_carrier_ok(de->dev) && de->media_type != DE_MEDIA_AUI &&
+	    de->media_type != DE_MEDIA_BNC) {
+		de_link_down(de);
+		mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
+	}
+}
+
+static int de_reset_mac (struct de_private *de)
+{
+	u32 status, tmp;
+
+	/*
+	 * Reset MAC.  de4x5.c and tulip.c examined for "advice"
+	 * in this area.
+	 */
+
+	if (dr32(BusMode) == 0xffffffff)
+		return -EBUSY;
+
+	/* Reset the chip, holding bit 0 set at least 50 PCI cycles. */
+	dw32 (BusMode, CmdReset);
+	mdelay (1);
+
+	dw32 (BusMode, de_bus_mode);
+	mdelay (1);
+
+	for (tmp = 0; tmp < 5; tmp++) {
+		dr32 (BusMode);
+		mdelay (1);
+	}
+
+	mdelay (1);
+
+	status = dr32(MacStatus);
+	if (status & (RxState | TxState))
+		return -EBUSY;
+	if (status == 0xffffffff)
+		return -ENODEV;
+	return 0;
+}
+
+static void de_adapter_wake (struct de_private *de)
+{
+	u32 pmctl;
+
+	if (de->de21040)
+		return;
+
+	pci_read_config_dword(de->pdev, PCIPM, &pmctl);
+	if (pmctl & PM_Mask) {
+		pmctl &= ~PM_Mask;
+		pci_write_config_dword(de->pdev, PCIPM, pmctl);
+
+		/* de4x5.c delays, so we do too */
+		msleep(10);
+	}
+}
+
+static void de_adapter_sleep (struct de_private *de)
+{
+	u32 pmctl;
+
+	if (de->de21040)
+		return;
+
+	dw32(CSR13, 0); /* Reset phy */
+	pci_read_config_dword(de->pdev, PCIPM, &pmctl);
+	pmctl |= PM_Sleep;
+	pci_write_config_dword(de->pdev, PCIPM, pmctl);
+}
+
+static int de_init_hw (struct de_private *de)
+{
+	struct net_device *dev = de->dev;
+	u32 macmode;
+	int rc;
+
+	de_adapter_wake(de);
+
+	macmode = dr32(MacMode) & ~MacModeClear;
+
+	rc = de_reset_mac(de);
+	if (rc)
+		return rc;
+
+	de_set_media(de); /* reset phy */
+
+	dw32(RxRingAddr, de->ring_dma);
+	dw32(TxRingAddr, de->ring_dma + (sizeof(struct de_desc) * DE_RX_RING_SIZE));
+
+	dw32(MacMode, RxTx | macmode);
+
+	dr32(RxMissed); /* self-clearing */
+
+	dw32(IntrMask, de_intr_mask);
+
+	de_set_rx_mode(dev);
+
+	return 0;
+}
+
+static int de_refill_rx (struct de_private *de)
+{
+	unsigned i;
+
+	for (i = 0; i < DE_RX_RING_SIZE; i++) {
+		struct sk_buff *skb;
+
+		skb = netdev_alloc_skb(de->dev, de->rx_buf_sz);
+		if (!skb)
+			goto err_out;
+
+		de->rx_skb[i].mapping = dma_map_single(&de->pdev->dev,
+						       skb->data,
+						       de->rx_buf_sz,
+						       DMA_FROM_DEVICE);
+		de->rx_skb[i].skb = skb;
+
+		de->rx_ring[i].opts1 = cpu_to_le32(DescOwn);
+		if (i == (DE_RX_RING_SIZE - 1))
+			de->rx_ring[i].opts2 =
+				cpu_to_le32(RingEnd | de->rx_buf_sz);
+		else
+			de->rx_ring[i].opts2 = cpu_to_le32(de->rx_buf_sz);
+		de->rx_ring[i].addr1 = cpu_to_le32(de->rx_skb[i].mapping);
+		de->rx_ring[i].addr2 = 0;
+	}
+
+	return 0;
+
+err_out:
+	de_clean_rings(de);
+	return -ENOMEM;
+}
+
+static int de_init_rings (struct de_private *de)
+{
+	memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE);
+	de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
+
+	de->rx_tail = 0;
+	de->tx_head = de->tx_tail = 0;
+
+	return de_refill_rx (de);
+}
+
+static int de_alloc_rings (struct de_private *de)
+{
+	de->rx_ring = dma_alloc_coherent(&de->pdev->dev, DE_RING_BYTES,
+					 &de->ring_dma, GFP_KERNEL);
+	if (!de->rx_ring)
+		return -ENOMEM;
+	de->tx_ring = &de->rx_ring[DE_RX_RING_SIZE];
+	return de_init_rings(de);
+}
+
+static void de_clean_rings (struct de_private *de)
+{
+	unsigned i;
+
+	memset(de->rx_ring, 0, sizeof(struct de_desc) * DE_RX_RING_SIZE);
+	de->rx_ring[DE_RX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
+	wmb();
+	memset(de->tx_ring, 0, sizeof(struct de_desc) * DE_TX_RING_SIZE);
+	de->tx_ring[DE_TX_RING_SIZE - 1].opts2 = cpu_to_le32(RingEnd);
+	wmb();
+
+	for (i = 0; i < DE_RX_RING_SIZE; i++) {
+		if (de->rx_skb[i].skb) {
+			dma_unmap_single(&de->pdev->dev,
+					 de->rx_skb[i].mapping, de->rx_buf_sz,
+					 DMA_FROM_DEVICE);
+			dev_kfree_skb(de->rx_skb[i].skb);
+		}
+	}
+
+	for (i = 0; i < DE_TX_RING_SIZE; i++) {
+		struct sk_buff *skb = de->tx_skb[i].skb;
+		if ((skb) && (skb != DE_DUMMY_SKB)) {
+			if (skb != DE_SETUP_SKB) {
+				de->dev->stats.tx_dropped++;
+				dma_unmap_single(&de->pdev->dev,
+						 de->tx_skb[i].mapping,
+						 skb->len, DMA_TO_DEVICE);
+				dev_kfree_skb(skb);
+			} else {
+				dma_unmap_single(&de->pdev->dev,
+						 de->tx_skb[i].mapping,
+						 sizeof(de->setup_frame),
+						 DMA_TO_DEVICE);
+			}
+		}
+	}
+
+	memset(&de->rx_skb, 0, sizeof(struct ring_info) * DE_RX_RING_SIZE);
+	memset(&de->tx_skb, 0, sizeof(struct ring_info) * DE_TX_RING_SIZE);
+}
+
+static void de_free_rings (struct de_private *de)
+{
+	de_clean_rings(de);
+	dma_free_coherent(&de->pdev->dev, DE_RING_BYTES, de->rx_ring,
+			  de->ring_dma);
+	de->rx_ring = NULL;
+	de->tx_ring = NULL;
+}
+
+static int de_open (struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	const int irq = de->pdev->irq;
+	int rc;
+
+	netif_dbg(de, ifup, dev, "enabling interface\n");
+
+	de->rx_buf_sz = (dev->mtu <= 1500 ? PKT_BUF_SZ : dev->mtu + 32);
+
+	rc = de_alloc_rings(de);
+	if (rc) {
+		netdev_err(dev, "ring allocation failure, err=%d\n", rc);
+		return rc;
+	}
+
+	dw32(IntrMask, 0);
+
+	rc = request_irq(irq, de_interrupt, IRQF_SHARED, dev->name, dev);
+	if (rc) {
+		netdev_err(dev, "IRQ %d request failure, err=%d\n", irq, rc);
+		goto err_out_free;
+	}
+
+	rc = de_init_hw(de);
+	if (rc) {
+		netdev_err(dev, "h/w init failure, err=%d\n", rc);
+		goto err_out_free_irq;
+	}
+
+	netif_start_queue(dev);
+	mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
+
+	return 0;
+
+err_out_free_irq:
+	free_irq(irq, dev);
+err_out_free:
+	de_free_rings(de);
+	return rc;
+}
+
+static int de_close (struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	unsigned long flags;
+
+	netif_dbg(de, ifdown, dev, "disabling interface\n");
+
+	del_timer_sync(&de->media_timer);
+
+	spin_lock_irqsave(&de->lock, flags);
+	de_stop_hw(de);
+	netif_stop_queue(dev);
+	netif_carrier_off(dev);
+	spin_unlock_irqrestore(&de->lock, flags);
+
+	free_irq(de->pdev->irq, dev);
+
+	de_free_rings(de);
+	de_adapter_sleep(de);
+	return 0;
+}
+
+static void de_tx_timeout (struct net_device *dev, unsigned int txqueue)
+{
+	struct de_private *de = netdev_priv(dev);
+	const int irq = de->pdev->irq;
+
+	netdev_dbg(dev, "NIC status %08x mode %08x sia %08x desc %u/%u/%u\n",
+		   dr32(MacStatus), dr32(MacMode), dr32(SIAStatus),
+		   de->rx_tail, de->tx_head, de->tx_tail);
+
+	del_timer_sync(&de->media_timer);
+
+	disable_irq(irq);
+	spin_lock_irq(&de->lock);
+
+	de_stop_hw(de);
+	netif_stop_queue(dev);
+	netif_carrier_off(dev);
+
+	spin_unlock_irq(&de->lock);
+	enable_irq(irq);
+
+	/* Update the error counts. */
+	__de_get_stats(de);
+
+	synchronize_irq(irq);
+	de_clean_rings(de);
+
+	de_init_rings(de);
+
+	de_init_hw(de);
+
+	netif_wake_queue(dev);
+}
+
+static void __de_get_regs(struct de_private *de, u8 *buf)
+{
+	int i;
+	u32 *rbuf = (u32 *)buf;
+
+	/* read all CSRs */
+	for (i = 0; i < DE_NUM_REGS; i++)
+		rbuf[i] = dr32(i * 8);
+
+	/* handle self-clearing RxMissed counter, CSR8 */
+	de_rx_missed(de, rbuf[8]);
+}
+
+static void __de_get_link_ksettings(struct de_private *de,
+				    struct ethtool_link_ksettings *cmd)
+{
+	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
+						de->media_supported);
+	cmd->base.phy_address = 0;
+	ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
+						de->media_advertise);
+
+	switch (de->media_type) {
+	case DE_MEDIA_AUI:
+		cmd->base.port = PORT_AUI;
+		break;
+	case DE_MEDIA_BNC:
+		cmd->base.port = PORT_BNC;
+		break;
+	default:
+		cmd->base.port = PORT_TP;
+		break;
+	}
+
+	cmd->base.speed = 10;
+
+	if (dr32(MacMode) & FullDuplex)
+		cmd->base.duplex = DUPLEX_FULL;
+	else
+		cmd->base.duplex = DUPLEX_HALF;
+
+	if (de->media_lock)
+		cmd->base.autoneg = AUTONEG_DISABLE;
+	else
+		cmd->base.autoneg = AUTONEG_ENABLE;
+
+	/* ignore maxtxpkt, maxrxpkt for now */
+}
+
+static int __de_set_link_ksettings(struct de_private *de,
+				   const struct ethtool_link_ksettings *cmd)
+{
+	u32 new_media;
+	unsigned int media_lock;
+	u8 duplex = cmd->base.duplex;
+	u8 port = cmd->base.port;
+	u8 autoneg = cmd->base.autoneg;
+	u32 advertising;
+
+	ethtool_convert_link_mode_to_legacy_u32(&advertising,
+						cmd->link_modes.advertising);
+
+	if (cmd->base.speed != 10)
+		return -EINVAL;
+	if (duplex != DUPLEX_HALF && duplex != DUPLEX_FULL)
+		return -EINVAL;
+	if (port != PORT_TP && port != PORT_AUI && port != PORT_BNC)
+		return -EINVAL;
+	if (de->de21040 && port == PORT_BNC)
+		return -EINVAL;
+	if (autoneg != AUTONEG_DISABLE && autoneg != AUTONEG_ENABLE)
+		return -EINVAL;
+	if (advertising & ~de->media_supported)
+		return -EINVAL;
+	if (autoneg == AUTONEG_ENABLE &&
+	    (!(advertising & ADVERTISED_Autoneg)))
+		return -EINVAL;
+
+	switch (port) {
+	case PORT_AUI:
+		new_media = DE_MEDIA_AUI;
+		if (!(advertising & ADVERTISED_AUI))
+			return -EINVAL;
+		break;
+	case PORT_BNC:
+		new_media = DE_MEDIA_BNC;
+		if (!(advertising & ADVERTISED_BNC))
+			return -EINVAL;
+		break;
+	default:
+		if (autoneg == AUTONEG_ENABLE)
+			new_media = DE_MEDIA_TP_AUTO;
+		else if (duplex == DUPLEX_FULL)
+			new_media = DE_MEDIA_TP_FD;
+		else
+			new_media = DE_MEDIA_TP;
+		if (!(advertising & ADVERTISED_TP))
+			return -EINVAL;
+		if (!(advertising & (ADVERTISED_10baseT_Full |
+				     ADVERTISED_10baseT_Half)))
+			return -EINVAL;
+		break;
+	}
+
+	media_lock = (autoneg == AUTONEG_ENABLE) ? 0 : 1;
+
+	if ((new_media == de->media_type) &&
+	    (media_lock == de->media_lock) &&
+	    (advertising == de->media_advertise))
+		return 0; /* nothing to change */
+
+	de_link_down(de);
+	mod_timer(&de->media_timer, jiffies + DE_TIMER_NO_LINK);
+	de_stop_rxtx(de);
+
+	de->media_type = new_media;
+	de->media_lock = media_lock;
+	de->media_advertise = advertising;
+	de_set_media(de);
+	if (netif_running(de->dev))
+		de_start_rxtx(de);
+
+	return 0;
+}
+
+static void de_get_drvinfo (struct net_device *dev,struct ethtool_drvinfo *info)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	strlcpy(info->driver, DRV_NAME, sizeof(info->driver));
+	strlcpy(info->bus_info, pci_name(de->pdev), sizeof(info->bus_info));
+}
+
+static int de_get_regs_len(struct net_device *dev)
+{
+	return DE_REGS_SIZE;
+}
+
+static int de_get_link_ksettings(struct net_device *dev,
+				 struct ethtool_link_ksettings *cmd)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	spin_lock_irq(&de->lock);
+	__de_get_link_ksettings(de, cmd);
+	spin_unlock_irq(&de->lock);
+
+	return 0;
+}
+
+static int de_set_link_ksettings(struct net_device *dev,
+				 const struct ethtool_link_ksettings *cmd)
+{
+	struct de_private *de = netdev_priv(dev);
+	int rc;
+
+	spin_lock_irq(&de->lock);
+	rc = __de_set_link_ksettings(de, cmd);
+	spin_unlock_irq(&de->lock);
+
+	return rc;
+}
+
+static u32 de_get_msglevel(struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	return de->msg_enable;
+}
+
+static void de_set_msglevel(struct net_device *dev, u32 msglvl)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	de->msg_enable = msglvl;
+}
+
+static int de_get_eeprom(struct net_device *dev,
+			 struct ethtool_eeprom *eeprom, u8 *data)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	if (!de->ee_data)
+		return -EOPNOTSUPP;
+	if ((eeprom->offset != 0) || (eeprom->magic != 0) ||
+	    (eeprom->len != DE_EEPROM_SIZE))
+		return -EINVAL;
+	memcpy(data, de->ee_data, eeprom->len);
+
+	return 0;
+}
+
+static int de_nway_reset(struct net_device *dev)
+{
+	struct de_private *de = netdev_priv(dev);
+	u32 status;
+
+	if (de->media_type != DE_MEDIA_TP_AUTO)
+		return -EINVAL;
+	if (netif_carrier_ok(de->dev))
+		de_link_down(de);
+
+	status = dr32(SIAStatus);
+	dw32(SIAStatus, (status & ~NWayState) | NWayRestart);
+	netif_info(de, link, dev, "link nway restart, status %x,%x\n",
+		   status, dr32(SIAStatus));
+	return 0;
+}
+
+static void de_get_regs(struct net_device *dev, struct ethtool_regs *regs,
+			void *data)
+{
+	struct de_private *de = netdev_priv(dev);
+
+	regs->version = (DE_REGS_VER << 2) | de->de21040;
+
+	spin_lock_irq(&de->lock);
+	__de_get_regs(de, data);
+	spin_unlock_irq(&de->lock);
+}
+
+static const struct ethtool_ops de_ethtool_ops = {
+	.get_link		= ethtool_op_get_link,
+	.get_drvinfo		= de_get_drvinfo,
+	.get_regs_len		= de_get_regs_len,
+	.get_msglevel		= de_get_msglevel,
+	.set_msglevel		= de_set_msglevel,
+	.get_eeprom		= de_get_eeprom,
+	.nway_reset		= de_nway_reset,
+	.get_regs		= de_get_regs,
+	.get_link_ksettings	= de_get_link_ksettings,
+	.set_link_ksettings	= de_set_link_ksettings,
+};
+
+static void de21040_get_mac_address(struct de_private *de)
+{
+	unsigned i;
+
+	dw32 (ROMCmd, 0);	/* Reset the pointer with a dummy write. */
+	udelay(5);
+
+	for (i = 0; i < 6; i++) {
+		int value, boguscnt = 100000;
+		do {
+			value = dr32(ROMCmd);
+			rmb();
+		} while (value < 0 && --boguscnt > 0);
+		de->dev->dev_addr[i] = value;
+		udelay(1);
+		if (boguscnt <= 0)
+			pr_warn("timeout reading 21040 MAC address byte %u\n",
+				i);
+	}
+}
+
+static void de21040_get_media_info(struct de_private *de)
+{
+	unsigned int i;
+
+	de->media_type = DE_MEDIA_TP;
+	de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full |
+			       SUPPORTED_10baseT_Half | SUPPORTED_AUI;
+	de->media_advertise = de->media_supported;
+
+	for (i = 0; i < DE_MAX_MEDIA; i++) {
+		switch (i) {
+		case DE_MEDIA_AUI:
+		case DE_MEDIA_TP:
+		case DE_MEDIA_TP_FD:
+			de->media[i].type = i;
+			de->media[i].csr13 = t21040_csr13[i];
+			de->media[i].csr14 = t21040_csr14[i];
+			de->media[i].csr15 = t21040_csr15[i];
+			break;
+		default:
+			de->media[i].type = DE_MEDIA_INVALID;
+			break;
+		}
+	}
+}
+
+/* Note: this routine returns extra data bits for size detection. */
+static unsigned tulip_read_eeprom(void __iomem *regs, int location,
+				  int addr_len)
+{
+	int i;
+	unsigned retval = 0;
+	void __iomem *ee_addr = regs + ROMCmd;
+	int read_cmd = location | (EE_READ_CMD << addr_len);
+
+	writel(EE_ENB & ~EE_CS, ee_addr);
+	writel(EE_ENB, ee_addr);
+
+	/* Shift the read command bits out. */
+	for (i = 4 + addr_len; i >= 0; i--) {
+		short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+		writel(EE_ENB | dataval, ee_addr);
+		readl(ee_addr);
+		writel(EE_ENB | dataval | EE_SHIFT_CLK, ee_addr);
+		readl(ee_addr);
+		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
+	}
+	writel(EE_ENB, ee_addr);
+	readl(ee_addr);
+
+	for (i = 16; i > 0; i--) {
+		writel(EE_ENB | EE_SHIFT_CLK, ee_addr);
+		readl(ee_addr);
+		retval = (retval << 1) | ((readl(ee_addr) & EE_DATA_READ) ? 1 : 0);
+		writel(EE_ENB, ee_addr);
+		readl(ee_addr);
+	}
+
+	/* Terminate the EEPROM access. */
+	writel(EE_ENB & ~EE_CS, ee_addr);
+	return retval;
+}
+
+static void de21041_get_srom_info(struct de_private *de)
+{
+	unsigned i, sa_offset = 0, ofs;
+	u8 ee_data[DE_EEPROM_SIZE + 6] = {};
+	unsigned ee_addr_size = tulip_read_eeprom(de->regs, 0xff, 8) & 0x40000 ? 8 : 6;
+	struct de_srom_info_leaf *il;
+	void *bufp;
+
+	/* download entire eeprom */
+	for (i = 0; i < DE_EEPROM_WORDS; i++)
+		((__le16 *)ee_data)[i] =
+			cpu_to_le16(tulip_read_eeprom(de->regs, i, ee_addr_size));
+
+	/* DEC now has a specification but early board makers
+	   just put the address in the first EEPROM locations. */
+	/* This does  memcmp(eedata, eedata+16, 8) */
+
+#ifndef CONFIG_MIPS_COBALT
+
+	for (i = 0; i < 8; i ++)
+		if (ee_data[i] != ee_data[16+i])
+			sa_offset = 20;
+
+#endif
+
+	/* store MAC address */
+	for (i = 0; i < 6; i ++)
+		de->dev->dev_addr[i] = ee_data[i + sa_offset];
+
+	/* get offset of controller 0 info leaf.  ignore 2nd byte. */
+	ofs = ee_data[SROMC0InfoLeaf];
+	if (ofs >= (sizeof(ee_data) - sizeof(struct de_srom_info_leaf) - sizeof(struct de_srom_media_block)))
+		goto bad_srom;
+
+	/* get pointer to info leaf */
+	il = (struct de_srom_info_leaf *) &ee_data[ofs];
+
+	/* paranoia checks */
+	if (il->n_blocks == 0)
+		goto bad_srom;
+	if ((sizeof(ee_data) - ofs) <
+	    (sizeof(struct de_srom_info_leaf) + (sizeof(struct de_srom_media_block) * il->n_blocks)))
+		goto bad_srom;
+
+	/* get default media type */
+	switch (get_unaligned(&il->default_media)) {
+	case 0x0001:  de->media_type = DE_MEDIA_BNC; break;
+	case 0x0002:  de->media_type = DE_MEDIA_AUI; break;
+	case 0x0204:  de->media_type = DE_MEDIA_TP_FD; break;
+	default: de->media_type = DE_MEDIA_TP_AUTO; break;
+	}
+
+	if (netif_msg_probe(de))
+		pr_info("de%d: SROM leaf offset %u, default media %s\n",
+		       de->board_idx, ofs, media_name[de->media_type]);
+
+	/* init SIA register values to defaults */
+	for (i = 0; i < DE_MAX_MEDIA; i++) {
+		de->media[i].type = DE_MEDIA_INVALID;
+		de->media[i].csr13 = 0xffff;
+		de->media[i].csr14 = 0xffff;
+		de->media[i].csr15 = 0xffff;
+	}
+
+	/* parse media blocks to see what medias are supported,
+	 * and if any custom CSR values are provided
+	 */
+	bufp = ((void *)il) + sizeof(*il);
+	for (i = 0; i < il->n_blocks; i++) {
+		struct de_srom_media_block *ib = bufp;
+		unsigned idx;
+
+		/* index based on media type in media block */
+		switch(ib->opts & MediaBlockMask) {
+		case 0: /* 10baseT */
+			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Half
+					  | SUPPORTED_Autoneg;
+			idx = DE_MEDIA_TP;
+			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
+			break;
+		case 1: /* BNC */
+			de->media_supported |= SUPPORTED_BNC;
+			idx = DE_MEDIA_BNC;
+			break;
+		case 2: /* AUI */
+			de->media_supported |= SUPPORTED_AUI;
+			idx = DE_MEDIA_AUI;
+			break;
+		case 4: /* 10baseT-FD */
+			de->media_supported |= SUPPORTED_TP | SUPPORTED_10baseT_Full
+					  | SUPPORTED_Autoneg;
+			idx = DE_MEDIA_TP_FD;
+			de->media[DE_MEDIA_TP_AUTO].type = DE_MEDIA_TP_AUTO;
+			break;
+		default:
+			goto bad_srom;
+		}
+
+		de->media[idx].type = idx;
+
+		if (netif_msg_probe(de))
+			pr_info("de%d:   media block #%u: %s",
+				de->board_idx, i,
+				media_name[de->media[idx].type]);
+
+		bufp += sizeof (ib->opts);
+
+		if (ib->opts & MediaCustomCSRs) {
+			de->media[idx].csr13 = get_unaligned(&ib->csr13);
+			de->media[idx].csr14 = get_unaligned(&ib->csr14);
+			de->media[idx].csr15 = get_unaligned(&ib->csr15);
+			bufp += sizeof(ib->csr13) + sizeof(ib->csr14) +
+				sizeof(ib->csr15);
+
+			if (netif_msg_probe(de))
+				pr_cont(" (%x,%x,%x)\n",
+					de->media[idx].csr13,
+					de->media[idx].csr14,
+					de->media[idx].csr15);
+
+		} else {
+			if (netif_msg_probe(de))
+				pr_cont("\n");
+		}
+
+		if (bufp > ((void *)&ee_data[DE_EEPROM_SIZE - 3]))
+			break;
+	}
+
+	de->media_advertise = de->media_supported;
+
+fill_defaults:
+	/* fill in defaults, for cases where custom CSRs not used */
+	for (i = 0; i < DE_MAX_MEDIA; i++) {
+		if (de->media[i].csr13 == 0xffff)
+			de->media[i].csr13 = t21041_csr13[i];
+		if (de->media[i].csr14 == 0xffff) {
+			/* autonegotiation is broken at least on some chip
+			   revisions - rev. 0x21 works, 0x11 does not */
+			if (de->pdev->revision < 0x20)
+				de->media[i].csr14 = t21041_csr14_brk[i];
+			else
+				de->media[i].csr14 = t21041_csr14[i];
+		}
+		if (de->media[i].csr15 == 0xffff)
+			de->media[i].csr15 = t21041_csr15[i];
+	}
+
+	de->ee_data = kmemdup(&ee_data[0], DE_EEPROM_SIZE, GFP_KERNEL);
+
+	return;
+
+bad_srom:
+	/* for error cases, it's ok to assume we support all these */
+	for (i = 0; i < DE_MAX_MEDIA; i++)
+		de->media[i].type = i;
+	de->media_supported =
+		SUPPORTED_10baseT_Half |
+		SUPPORTED_10baseT_Full |
+		SUPPORTED_Autoneg |
+		SUPPORTED_TP |
+		SUPPORTED_AUI |
+		SUPPORTED_BNC;
+	goto fill_defaults;
+}
+
+static const struct net_device_ops de_netdev_ops = {
+	.ndo_open		= de_open,
+	.ndo_stop		= de_close,
+	.ndo_set_rx_mode	= de_set_rx_mode,
+	.ndo_start_xmit		= de_start_xmit,
+	.ndo_get_stats		= de_get_stats,
+	.ndo_tx_timeout 	= de_tx_timeout,
+	.ndo_set_mac_address 	= eth_mac_addr,
+	.ndo_validate_addr	= eth_validate_addr,
+};
+
+static int de_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	struct net_device *dev;
+	struct de_private *de;
+	int rc;
+	void __iomem *regs;
+	unsigned long pciaddr;
+	static int board_idx = -1;
+
+	board_idx++;
+
+	/* allocate a new ethernet device structure, and fill in defaults */
+	dev = alloc_etherdev(sizeof(struct de_private));
+	if (!dev)
+		return -ENOMEM;
+
+	dev->netdev_ops = &de_netdev_ops;
+	SET_NETDEV_DEV(dev, &pdev->dev);
+	dev->ethtool_ops = &de_ethtool_ops;
+	dev->watchdog_timeo = TX_TIMEOUT;
+
+	de = netdev_priv(dev);
+	de->de21040 = ent->driver_data == 0 ? 1 : 0;
+	de->pdev = pdev;
+	de->dev = dev;
+	de->msg_enable = (debug < 0 ? DE_DEF_MSG_ENABLE : debug);
+	de->board_idx = board_idx;
+	spin_lock_init (&de->lock);
+	timer_setup(&de->media_timer,
+		    de->de21040 ? de21040_media_timer : de21041_media_timer,
+		    0);
+
+	netif_carrier_off(dev);
+
+	/* wake up device, assign resources */
+	rc = pci_enable_device(pdev);
+	if (rc)
+		goto err_out_free;
+
+	/* reserve PCI resources to ensure driver atomicity */
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc)
+		goto err_out_disable;
+
+	/* check for invalid IRQ value */
+	if (pdev->irq < 2) {
+		rc = -EIO;
+		pr_err("invalid irq (%d) for pci dev %s\n",
+		       pdev->irq, pci_name(pdev));
+		goto err_out_res;
+	}
+
+	/* obtain and check validity of PCI I/O address */
+	pciaddr = pci_resource_start(pdev, 1);
+	if (!pciaddr) {
+		rc = -EIO;
+		pr_err("no MMIO resource for pci dev %s\n", pci_name(pdev));
+		goto err_out_res;
+	}
+	if (pci_resource_len(pdev, 1) < DE_REGS_SIZE) {
+		rc = -EIO;
+		pr_err("MMIO resource (%llx) too small on pci dev %s\n",
+		       (unsigned long long)pci_resource_len(pdev, 1),
+		       pci_name(pdev));
+		goto err_out_res;
+	}
+
+	/* remap CSR registers */
+	regs = ioremap(pciaddr, DE_REGS_SIZE);
+	if (!regs) {
+		rc = -EIO;
+		pr_err("Cannot map PCI MMIO (%llx@%lx) on pci dev %s\n",
+		       (unsigned long long)pci_resource_len(pdev, 1),
+		       pciaddr, pci_name(pdev));
+		goto err_out_res;
+	}
+	de->regs = regs;
+
+	de_adapter_wake(de);
+
+	/* make sure hardware is not running */
+	rc = de_reset_mac(de);
+	if (rc) {
+		pr_err("Cannot reset MAC, pci dev %s\n", pci_name(pdev));
+		goto err_out_iomap;
+	}
+
+	/* get MAC address, initialize default media type and
+	 * get list of supported media
+	 */
+	if (de->de21040) {
+		de21040_get_mac_address(de);
+		de21040_get_media_info(de);
+	} else {
+		de21041_get_srom_info(de);
+	}
+
+	/* register new network interface with kernel */
+	rc = register_netdev(dev);
+	if (rc)
+		goto err_out_iomap;
+
+	/* print info about board and interface just registered */
+	netdev_info(dev, "%s at %p, %pM, IRQ %d\n",
+		    de->de21040 ? "21040" : "21041",
+		    regs, dev->dev_addr, pdev->irq);
+
+	pci_set_drvdata(pdev, dev);
+
+	/* enable busmastering */
+	pci_set_master(pdev);
+
+	/* put adapter to sleep */
+	de_adapter_sleep(de);
+
+	return 0;
+
+err_out_iomap:
+	kfree(de->ee_data);
+	iounmap(regs);
+err_out_res:
+	pci_release_regions(pdev);
+err_out_disable:
+	pci_disable_device(pdev);
+err_out_free:
+	free_netdev(dev);
+	return rc;
+}
+
+static void de_remove_one(struct pci_dev *pdev)
+{
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct de_private *de = netdev_priv(dev);
+
+	BUG_ON(!dev);
+	unregister_netdev(dev);
+	kfree(de->ee_data);
+	iounmap(de->regs);
+	pci_release_regions(pdev);
+	pci_disable_device(pdev);
+	free_netdev(dev);
+}
+
+static int __maybe_unused de_suspend(struct device *dev_d)
+{
+	struct pci_dev *pdev = to_pci_dev(dev_d);
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct de_private *de = netdev_priv(dev);
+
+	rtnl_lock();
+	if (netif_running (dev)) {
+		const int irq = pdev->irq;
+
+		del_timer_sync(&de->media_timer);
+
+		disable_irq(irq);
+		spin_lock_irq(&de->lock);
+
+		de_stop_hw(de);
+		netif_stop_queue(dev);
+		netif_device_detach(dev);
+		netif_carrier_off(dev);
+
+		spin_unlock_irq(&de->lock);
+		enable_irq(irq);
+
+		/* Update the error counts. */
+		__de_get_stats(de);
+
+		synchronize_irq(irq);
+		de_clean_rings(de);
+
+		de_adapter_sleep(de);
+	} else {
+		netif_device_detach(dev);
+	}
+	rtnl_unlock();
+	return 0;
+}
+
+static int __maybe_unused de_resume(struct device *dev_d)
+{
+	struct pci_dev *pdev = to_pci_dev(dev_d);
+	struct net_device *dev = pci_get_drvdata(pdev);
+	struct de_private *de = netdev_priv(dev);
+
+	rtnl_lock();
+	if (netif_device_present(dev))
+		goto out;
+	if (!netif_running(dev))
+		goto out_attach;
+	pci_set_master(pdev);
+	de_init_rings(de);
+	de_init_hw(de);
+out_attach:
+	netif_device_attach(dev);
+out:
+	rtnl_unlock();
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(de_pm_ops, de_suspend, de_resume);
+
+static struct pci_driver de_driver = {
+	.name		= DRV_NAME,
+	.id_table	= de_pci_tbl,
+	.probe		= de_init_one,
+	.remove		= de_remove_one,
+	.driver.pm	= &de_pm_ops,
+};
+
+static int __init de_init (void)
+{
+	return pci_register_driver(&de_driver);
+}
+
+static void __exit de_exit (void)
+{
+	pci_unregister_driver (&de_driver);
+}
+
+module_init(de_init);
+module_exit(de_exit);