2006-01-22 Thomas Schwinge <tschwinge@gnu.org>

* configure, i386/configure, i386/linux/configure, linux/configure,
	i386/linux/device-drivers.h.in: Regenerated.

	* linux/src/drivers/net/ne2k-pci.c: Resolve conflicts.

2006-01-22  Guillem Jover  <guillem@hadrons.org>

	* i386/linux/configure.ac: Renamed winbond-840 driver to winbond_840.
	Enable the starfire, intel_gige and natsemi network drivers.  Remove
	"CONFIG_" from cb_chim, starfire, sundance, winbond840, hamachi,
	natsemi, myson803 and ns820 driver declarations.  Replace INTER_GIGE
	with INTEL_GIGE.
	* linux/dev/drivers/net/Space.c: Add conditional probes for natsemi,
	ns820, winbond840, hamachi, sundance, starfire, myson803 and intel-gige
	drivers.

	* linux/src/include/asm-i386/cache.h: New file from linux 2.2.26.
	* linux/dev/include/linux/malloc.h: Include <asm/cache.h>.

	* linux/src/drivers/net/ns820.c (netsami_drv_id): Renamed to ...
	(ns820_drv_id): ... this.  Fix all callers.
	* linux/src/drivers/net/intel-gige.c
	(skel_netdev_probe): Renamed to ...
	(igige_probe): ... this.
	* linux/dev/drivers/net/eepro100.c: Remove obsoleted file.
	* linux/src/drivers/net/eepro100.c (pci_id_tbl): Add PCI ID's from
	linux-2.6.14-rc4.

2006-01-22  Alfred M. Szmidt  <ams@gnu.org>

	* i386/linux/configure.ac: Added `pci-scan.o' to the network driver
	class.  (ns820, myson803, sundance, winbond-840, hamachi): New drivers.
	* i386/linux/Makefile.in (linux-net-files): Added `cb_shim.c',
	`hamachi.c', `intel-gige.c', `myson803.c', `natsemi.c', `ns820.c',
	`starfire.c', `sundance.c', `winbond-840.c' and `pci-scan.c'.

	* linux/dev/include/linux/modversions.h: New file.

	* linux/src/drivers/net/cb_shim.c, linux/src/drivers/net/hamachi.c,
	linux/src/drivers/net/intel-gige.c, linux/src/drivers/net/myson803.c,
	linux/src/drivers/net/natsemi.c, linux/src/drivers/net/ns820.c,
	linux/src/drivers/net/starfire.c, linux/src/drivers/net/sundance.c,
	linux/src/drivers/net/winbond-840.c,
	linux/src/drivers/net/kern_compat.h, linux/src/drivers/net/pci-scan.c,
	linux/src/drivers/net/pci-scan.h: New files from netdrivers 3.5 package
	(http://www.scyld.com/network).

	* linux/src/drivers/net/3c59x.c, linux/src/drivers/net/eepro100.c,
	linux/src/drivers/net/epic100.c, linux/src/drivers/net/ne2k-pci.c,
	linux/src/drivers/net/rtl8139.c, linux/src/drivers/net/tulip.c,
	linux/src/drivers/net/via-rhine.c, linux/src/drivers/net/yellowfin.c:
	Updated files from netdrivers 3.5 (http://www.scyld.com/network).

1 files changed, 1556 insertions, 0 deletions

diff --git a/linux/src/drivers/net/sundance.c b/linux/src/drivers/net/sundance.c
new file mode 100644
index 0000000..cb8dfe5
--- /dev/null
+++ b/linux/src/drivers/net/sundance.c
@@ -0,0 +1,1556 @@
+/* sundance.c: A Linux device driver for the Sundance ST201 "Alta". */
+/*
+	Written 1999-2003 by Donald Becker.
+
+	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.
+
+	The author may be reached as becker@scyld.com, or C/O
+	Scyld Computing Corporation
+	410 Severn Ave., Suite 210
+	Annapolis MD 21403
+
+	Support information and updates available at
+	http://www.scyld.com/network/sundance.html
+*/
+
+/* These identify the driver base version and may not be removed. */
+static const char version1[] =
+"sundance.c:v1.11 2/4/2003  Written by Donald Becker <becker@scyld.com>\n";
+static const char version2[] =
+"  http://www.scyld.com/network/sundance.html\n";
+/* Updated to recommendations in pci-skeleton v2.12. */
+
+/* Automatically extracted configuration info:
+probe-func: sundance_probe
+config-in: tristate 'Sundance ST201 "Alta" PCI Ethernet support' CONFIG_SUNDANCE
+c-help-name: Sundance ST201 "Alta" PCI Ethernet support
+c-help-symbol: CONFIG_SUNDANCE
+c-help: This driver is for the Sundance ST201 "Alta" and Kendin KS8723, as
+c-help: used on the D-Link DFE-550 and DFE-580.
+c-help: Design information, usage details and updates are available from
+c-help: http://www.scyld.com/network/sundance.html
+*/
+
+/* The user-configurable values.
+   These may be modified when a driver module is loaded.*/
+
+/* Message enable level: 0..31 = no..all messages.  See NETIF_MSG docs. */
+static int debug = 2;
+
+/* Maximum events (Rx packets, etc.) to handle at each interrupt. */
+static int max_interrupt_work = 20;
+
+/* Maximum number of multicast addresses to filter (vs. rx-all-multicast).
+   The sundance uses a 64 element hash table based on the Ethernet CRC.  */
+static int multicast_filter_limit = 32;
+
+/* Set the copy breakpoint for the copy-only-tiny-frames scheme.
+   Setting to > 1518 effectively disables this feature.
+   This chip can receive into any byte alignment buffers, so word-oriented
+   archs do not need a copy-align of the IP header. */
+static int rx_copybreak = 0;
+
+/* Used to pass the media type, etc.
+   Both 'options[]' and 'full_duplex[]' should exist for driver
+   interoperability.
+   The media type is usually passed in 'options[]'.
+    The default is autonegotation for speed and duplex.
+	This should rarely be overridden.
+    Use option values 0x10/0x20 for 10Mbps, 0x100,0x200 for 100Mbps.
+    Use option values 0x10 and 0x100 for forcing half duplex fixed speed.
+    Use option values 0x20 and 0x200 for forcing full duplex operation.
+*/
+#define MAX_UNITS 8		/* More are supported, limit only on options */
+static int options[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
+
+/* Operational parameters that are set at compile time. */
+
+/* Ring sizes are a power of two only for compile efficiency.
+   The compiler will convert <unsigned>'%'<2^N> into a bit mask.
+   There must be at least five Tx entries for the tx_full hysteresis, and
+   more than 31 requires modifying the Tx status handling error recovery.
+   Leave a inactive gap in the Tx ring for better cache behavior.
+   Making the Tx ring too large decreases the effectiveness of channel
+   bonding and packet priority.
+   Large receive rings waste memory and impact buffer accounting.
+   The driver need to protect against interrupt latency and the kernel
+   not reserving enough available memory.
+*/
+#define TX_RING_SIZE	16
+#define TX_QUEUE_LEN	10		/* Limit ring entries actually used.  */
+#define RX_RING_SIZE	32
+
+/* Operational parameters that usually are not changed. */
+/* Time in jiffies before concluding the transmitter is hung. */
+#define TX_TIMEOUT  (6*HZ)
+
+/* Allocation size of Rx buffers with normal sized Ethernet frames.
+   Do not change this value without good reason.  This is not a limit,
+   but a way to keep a consistent allocation size among drivers.
+ */
+#define PKT_BUF_SZ		1536
+
+/* Set iff a MII transceiver on any interface requires mdio preamble.
+   This only set with older tranceivers, so the extra
+   code size of a per-interface flag is not worthwhile. */
+static char mii_preamble_required = 0;
+
+#ifndef __KERNEL__
+#define __KERNEL__
+#endif
+#if !defined(__OPTIMIZE__)
+#warning  You must compile this file with the correct options!
+#warning  See the last lines of the source file.
+#error You must compile this driver with "-O".
+#endif
+
+/* Include files, designed to support most kernel versions 2.0.0 and later. */
+#include <linux/config.h>
+#if defined(CONFIG_SMP) && ! defined(__SMP__)
+#define __SMP__
+#endif
+#if defined(MODULE) && defined(CONFIG_MODVERSIONS) && ! defined(MODVERSIONS)
+#define MODVERSIONS
+#endif
+
+#include <linux/version.h>
+#if defined(MODVERSIONS)
+#include <linux/modversions.h>
+#endif
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#if LINUX_VERSION_CODE >= 0x20400
+#include <linux/slab.h>
+#else
+#include <linux/malloc.h>
+#endif
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+
+#if LINUX_VERSION_CODE >= 0x20300
+#include <linux/spinlock.h>
+#elif LINUX_VERSION_CODE >= 0x20200
+#include <asm/spinlock.h>
+#endif
+
+#ifdef INLINE_PCISCAN
+#include "k_compat.h"
+#else
+#include "pci-scan.h"
+#include "kern_compat.h"
+#endif
+
+/* Condensed operations for readability. */
+#define virt_to_le32desc(addr)  cpu_to_le32(virt_to_bus(addr))
+#define le32desc_to_virt(addr)  bus_to_virt(le32_to_cpu(addr))
+
+#if (LINUX_VERSION_CODE >= 0x20100)  &&  defined(MODULE)
+char kernel_version[] = UTS_RELEASE;
+#endif
+
+MODULE_AUTHOR("Donald Becker <becker@scyld.com>");
+MODULE_DESCRIPTION("Sundance Alta Ethernet driver");
+MODULE_LICENSE("GPL");
+MODULE_PARM(max_interrupt_work, "i");
+MODULE_PARM(debug, "i");
+MODULE_PARM(rx_copybreak, "i");
+MODULE_PARM(options, "1-" __MODULE_STRING(MAX_UNITS) "i");
+MODULE_PARM(full_duplex, "1-" __MODULE_STRING(MAX_UNITS) "i");
+MODULE_PARM(multicast_filter_limit, "i");
+
+MODULE_PARM_DESC(debug, "Driver message level (0-31)");
+MODULE_PARM_DESC(options, "Force transceiver type or fixed speed+duplex");
+MODULE_PARM_DESC(max_interrupt_work,
+				 "Driver maximum events handled per interrupt");
+MODULE_PARM_DESC(full_duplex,
+				 "Non-zero to set forced full duplex (deprecated).");
+MODULE_PARM_DESC(rx_copybreak,
+				 "Breakpoint in bytes for copy-only-tiny-frames");
+MODULE_PARM_DESC(multicast_filter_limit,
+				 "Multicast addresses before switching to Rx-all-multicast");
+
+/*
+				Theory of Operation
+
+I. Board Compatibility
+
+This driver is designed for the Sundance Technologies "Alta" ST201 chip.
+The Kendin KS8723 is the same design with an integrated transceiver and
+new quirks.
+
+II. Board-specific settings
+
+This is an all-in-one chip, so there are no board-specific settings.
+
+III. Driver operation
+
+IIIa. Ring buffers
+
+This driver uses two statically allocated fixed-size descriptor lists
+formed into rings by a branch from the final descriptor to the beginning of
+the list.  The ring sizes are set at compile time by RX/TX_RING_SIZE.
+Some chips explicitly use only 2^N sized rings, while others use a
+'next descriptor' pointer that the driver forms into rings.
+
+IIIb/c. Transmit/Receive Structure
+
+This driver uses a zero-copy receive and transmit scheme.
+The driver allocates full frame size skbuffs for the Rx ring buffers at
+open() time and passes the skb->data field to the chip as receive data
+buffers.  When an incoming frame is less than RX_COPYBREAK bytes long,
+a fresh skbuff is allocated and the frame is copied to the new skbuff.
+When the incoming frame is larger, the skbuff is passed directly up the
+protocol stack.  Buffers consumed this way are replaced by newly allocated
+skbuffs in a later phase of receives.
+
+The RX_COPYBREAK value is chosen to trade-off the memory wasted by
+using a full-sized skbuff for small frames vs. the copying costs of larger
+frames.  New boards are typically used in generously configured machines
+and the underfilled buffers have negligible impact compared to the benefit of
+a single allocation size, so the default value of zero results in never
+copying packets.  When copying is done, the cost is usually mitigated by using
+a combined copy/checksum routine.  Copying also preloads the cache, which is
+most useful with small frames.
+
+A subtle aspect of the operation is that the IP header at offset 14 in an
+ethernet frame isn't longword aligned for further processing.
+Unaligned buffers are permitted by the Sundance hardware, so
+frames are received into the skbuff at an offset of "+2", 16-byte aligning
+the IP header.
+
+IIId. Synchronization
+
+The driver runs as two independent, single-threaded flows of control.  One
+is the send-packet routine, which enforces single-threaded use by the
+dev->tbusy flag.  The other thread is the interrupt handler, which is single
+threaded by the hardware and interrupt handling software.
+
+The send packet thread has partial control over the Tx ring and 'dev->tbusy'
+flag.  It sets the tbusy flag whenever it's queuing a Tx packet. If the next
+queue slot is empty, it clears the tbusy flag when finished otherwise it sets
+the 'lp->tx_full' flag.
+
+The interrupt handler has exclusive control over the Rx ring and records stats
+from the Tx ring.  After reaping the stats, it marks the Tx queue entry as
+empty by incrementing the dirty_tx mark. Iff the 'lp->tx_full' flag is set, it
+clears both the tx_full and tbusy flags.
+
+IV. Notes
+
+IVb. References
+
+The Sundance ST201 datasheet, preliminary version.
+The Kendin KS8723 datasheet, preliminary version.
+http://www.scyld.com/expert/100mbps.html
+http://www.scyld.com/expert/NWay.html
+
+IVc. Errata
+
+*/
+
+
+
+/* Work-around for Kendin chip bugs.  This will be reversed after tracking
+ down all of the chip access quirks in memory mode. */
+#ifndef USE_MEM_OPS
+#define USE_IO_OPS 1
+#endif
+
+static void *sundance_probe1(struct pci_dev *pdev, void *init_dev,
+							 long ioaddr, int irq, int chip_idx, int find_cnt);
+static int sundance_pwr_event(void *dev_instance, int event);
+
+enum chip_capability_flags {CanHaveMII=1, KendinPktDropBug=2, };
+#ifdef USE_IO_OPS
+#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_IO  | PCI_ADDR0)
+#else
+#define PCI_IOTYPE (PCI_USES_MASTER | PCI_USES_MEM | PCI_ADDR1)
+#endif
+
+static struct pci_id_info pci_id_tbl[] = {
+	{"D-Link DFE-580TX (Kendin/Sundance ST201 Alta)",
+	 {0x10021186, 0xffffffff, 0x10121186, 0xffffffff, 0x14, 0xff},
+	 PCI_IOTYPE, 128, CanHaveMII|KendinPktDropBug},
+	{"D-Link DFE-580TX (Sundance ST201)",
+	 {0x10021186, 0xffffffff, 0x10121186, 0xffffffff, },
+	 PCI_IOTYPE, 128, CanHaveMII|KendinPktDropBug},
+	{"D-Link DFE-550FX 100baseFx (Sundance ST201)",
+	 {0x10031186, 0xffffffff, },
+	 PCI_IOTYPE, 128, CanHaveMII|KendinPktDropBug},
+	{"OEM Sundance Technology ST201", {0x10021186, 0xffffffff, },
+	 PCI_IOTYPE, 128, CanHaveMII},
+	{"Sundance Technology Alta", {0x020113F0, 0xffffffff, },
+	 PCI_IOTYPE, 128, CanHaveMII},
+	{0,},						/* 0 terminated list. */
+};
+
+struct drv_id_info sundance_drv_id = {
+	"sundance", PCI_HOTSWAP, PCI_CLASS_NETWORK_ETHERNET<<8, pci_id_tbl,
+	sundance_probe1, sundance_pwr_event };
+
+/* This driver was written to use PCI memory space, however x86-oriented
+   hardware often uses I/O space accesses. */
+#ifdef USE_IO_OPS
+#undef readb
+#undef readw
+#undef readl
+#undef writeb
+#undef writew
+#undef writel
+#define readb inb
+#define readw inw
+#define readl inl
+#define writeb outb
+#define writew outw
+#define writel outl
+#endif
+
+/* Offsets to the device registers.
+   Unlike software-only systems, device drivers interact with complex hardware.
+   It's not useful to define symbolic names for every register bit in the
+   device.  The name can only partially document the semantics and make
+   the driver longer and more difficult to read.
+   In general, only the important configuration values or bits changed
+   multiple times should be defined symbolically.
+*/
+enum alta_offsets {
+	DMACtrl=0x00,     TxListPtr=0x04, TxDMACtrl=0x08, TxDescPoll=0x0a,
+	RxDMAStatus=0x0c, RxListPtr=0x10, RxDMACtrl=0x14, RxDescPoll=0x16,
+	LEDCtrl=0x1a, ASICCtrl=0x30,
+	EEData=0x34, EECtrl=0x36, TxThreshold=0x3c,
+	FlashAddr=0x40, FlashData=0x44, WakeEvent=0x45, TxStatus=0x46,
+	DownCounter=0x48, IntrClear=0x4a, IntrEnable=0x4c, IntrStatus=0x4e,
+	MACCtrl0=0x50, MACCtrl1=0x52, StationAddr=0x54,
+	MaxFrameSize=0x5A, RxMode=0x5c, MIICtrl=0x5e,
+	MulticastFilter0=0x60, MulticastFilter1=0x64,
+	RxOctetsLow=0x68, RxOctetsHigh=0x6a, TxOctetsLow=0x6c, TxOctetsHigh=0x6e,
+	TxFramesOK=0x70, RxFramesOK=0x72, StatsCarrierError=0x74,
+	StatsLateColl=0x75, StatsMultiColl=0x76, StatsOneColl=0x77,
+	StatsTxDefer=0x78, RxMissed=0x79, StatsTxXSDefer=0x7a, StatsTxAbort=0x7b,
+	StatsBcastTx=0x7c, StatsBcastRx=0x7d, StatsMcastTx=0x7e, StatsMcastRx=0x7f,
+	/* Aliased and bogus values! */
+	RxStatus=0x0c,
+};
+
+/* Bits in the interrupt status/mask registers. */
+enum intr_status_bits {
+	IntrSummary=0x0001, IntrPCIErr=0x0002, IntrMACCtrl=0x0008,
+	IntrTxDone=0x0004, IntrRxDone=0x0010, IntrRxStart=0x0020,
+	IntrDrvRqst=0x0040,
+	StatsMax=0x0080, LinkChange=0x0100,
+	IntrTxDMADone=0x0200, IntrRxDMADone=0x0400,
+};
+
+/* Bits in the RxMode register. */
+enum rx_mode_bits {
+	AcceptAllIPMulti=0x20, AcceptMultiHash=0x10, AcceptAll=0x08,
+	AcceptBroadcast=0x04, AcceptMulticast=0x02, AcceptMyPhys=0x01,
+};
+/* Bits in MACCtrl. */
+enum mac_ctrl0_bits {
+	EnbFullDuplex=0x20, EnbRcvLargeFrame=0x40,
+	EnbFlowCtrl=0x100, EnbPassRxCRC=0x200,
+};
+enum mac_ctrl1_bits {
+	StatsEnable=0x0020,	StatsDisable=0x0040, StatsEnabled=0x0080,
+	TxEnable=0x0100, TxDisable=0x0200, TxEnabled=0x0400,
+	RxEnable=0x0800, RxDisable=0x1000, RxEnabled=0x2000,
+};
+
+/* The Rx and Tx buffer descriptors.
+   Using only 32 bit fields simplifies software endian correction.
+   This structure must be aligned, and should avoid spanning cache lines.
+*/
+struct netdev_desc {
+	u32 next_desc;
+	u32 status;
+	struct desc_frag { u32 addr, length; } frag[1];
+};
+
+/* Bits in netdev_desc.status */
+enum desc_status_bits {
+	DescOwn=0x8000, DescEndPacket=0x4000, DescEndRing=0x2000,
+	DescTxDMADone=0x10000,
+	LastFrag=0x80000000, DescIntrOnTx=0x8000, DescIntrOnDMADone=0x80000000,
+};
+
+#define PRIV_ALIGN	15 	/* Required alignment mask */
+/* Use  __attribute__((aligned (L1_CACHE_BYTES)))  to maintain alignment
+   within the structure. */
+struct netdev_private {
+	/* Descriptor rings first for alignment. */
+	struct netdev_desc rx_ring[RX_RING_SIZE];
+	struct netdev_desc tx_ring[TX_RING_SIZE];
+	struct net_device *next_module;		/* Link for devices of this type. */
+	void *priv_addr;					/* Unaligned address for kfree */
+	const char *product_name;
+	/* The addresses of receive-in-place skbuffs. */
+	struct sk_buff* rx_skbuff[RX_RING_SIZE];
+	/* The saved address of a sent-in-place packet/buffer, for later free(). */
+	struct sk_buff* tx_skbuff[TX_RING_SIZE];
+	struct net_device_stats stats;
+	struct timer_list timer;	/* Media monitoring timer. */
+	/* Frequently used values: keep some adjacent for cache effect. */
+	int msg_level;
+	int chip_id, drv_flags;
+	struct pci_dev *pci_dev;
+	int max_interrupt_work;
+
+	/* Note: Group variables for cache line effect. */
+	struct netdev_desc *rx_head_desc;
+	unsigned int cur_rx, dirty_rx;		/* Producer/consumer ring indices */
+	unsigned int rx_buf_sz;				/* Based on MTU+slack. */
+	int rx_copybreak;
+
+	spinlock_t txlock;					/* Group with Tx control cache line. */
+	struct netdev_desc *last_tx;		/* Last Tx descriptor used. */
+	unsigned int cur_tx, dirty_tx;
+	unsigned int tx_full:1;				/* The Tx queue is full. */
+
+	/* These values keep track of the transceiver/media in use. */
+	unsigned int full_duplex:1;			/* Full-duplex operation requested. */
+	unsigned int duplex_lock:1;
+	unsigned int medialock:1;			/* Do not sense media. */
+	unsigned int default_port;			/* Last dev->if_port value. */
+	/* Multicast and receive mode. */
+	spinlock_t mcastlock;				/* SMP lock multicast updates. */
+	u16 mcast_filter[4];
+	int multicast_filter_limit;
+
+	/* MII transceiver section. */
+	int mii_cnt;						/* MII device addresses. */
+	int link_status;
+	u16 advertising;					/* NWay media advertisement */
+	unsigned char phys[2];				/* MII device addresses. */
+};
+
+/* The station address location in the EEPROM. */
+#define EEPROM_SA_OFFSET	0x10
+
+static int  eeprom_read(long ioaddr, int location);
+static int  mdio_read(struct net_device *dev, int phy_id,
+					  unsigned int location);
+static void mdio_write(struct net_device *dev, int phy_id,
+					   unsigned int location, int value);
+static int  netdev_open(struct net_device *dev);
+static void sundance_start(struct net_device *dev);
+static int  change_mtu(struct net_device *dev, int new_mtu);
+static void check_duplex(struct net_device *dev);
+static void netdev_timer(unsigned long data);
+static void tx_timeout(struct net_device *dev);
+static void init_ring(struct net_device *dev);
+static int  start_tx(struct sk_buff *skb, struct net_device *dev);
+static void intr_handler(int irq, void *dev_instance, struct pt_regs *regs);
+static void netdev_error(struct net_device *dev, int intr_status);
+static int  netdev_rx(struct net_device *dev);
+static void netdev_error(struct net_device *dev, int intr_status);
+static void set_rx_mode(struct net_device *dev);
+static struct net_device_stats *get_stats(struct net_device *dev);
+static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static int  netdev_close(struct net_device *dev);
+
+
+
+/* A list of our installed devices, for removing the driver module. */
+static struct net_device *root_net_dev = NULL;
+
+#ifndef MODULE
+int sundance_probe(struct net_device *dev)
+{
+	if (pci_drv_register(&sundance_drv_id, dev) < 0)
+		return -ENODEV;
+	if (debug >= NETIF_MSG_DRV)	/* Emit version even if no cards detected. */
+		printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
+	return 0;
+}
+#endif
+
+static void *sundance_probe1(struct pci_dev *pdev, void *init_dev,
+							 long ioaddr, int irq, int chip_idx, int card_idx)
+{
+	struct net_device *dev;
+	struct netdev_private *np;
+	void *priv_mem;
+	int i, option = card_idx < MAX_UNITS ? options[card_idx] : 0;
+
+	dev = init_etherdev(init_dev, 0);
+	if (!dev)
+		return NULL;
+
+	/* Perhaps NETIF_MSG_PROBE */
+	printk(KERN_INFO "%s: %s at 0x%lx, ",
+		   dev->name, pci_id_tbl[chip_idx].name, ioaddr);
+
+	for (i = 0; i < 3; i++)
+		((u16 *)dev->dev_addr)[i] =
+			le16_to_cpu(eeprom_read(ioaddr, i + EEPROM_SA_OFFSET));
+	for (i = 0; i < 5; i++)
+		printk("%2.2x:", dev->dev_addr[i]);
+	printk("%2.2x, IRQ %d.\n", dev->dev_addr[i], irq);
+
+	/* Make certain elements e.g. descriptor lists are aligned. */
+	priv_mem = kmalloc(sizeof(*np) + PRIV_ALIGN, GFP_KERNEL);
+	/* Check for the very unlikely case of no memory. */
+	if (priv_mem == NULL)
+		return NULL;
+
+	/* All failure checks before this point.
+	   We do a request_region() only to register /proc/ioports info. */
+#ifdef USE_IO_OPS
+	request_region(ioaddr, pci_id_tbl[chip_idx].io_size, dev->name);
+#endif
+
+	dev->base_addr = ioaddr;
+	dev->irq = irq;
+
+	dev->priv = np = (void *)(((long)priv_mem + PRIV_ALIGN) & ~PRIV_ALIGN);
+	memset(np, 0, sizeof(*np));
+	np->priv_addr = priv_mem;
+
+	np->next_module = root_net_dev;
+	root_net_dev = dev;
+
+	np->pci_dev = pdev;
+	np->chip_id = chip_idx;
+	np->drv_flags = pci_id_tbl[chip_idx].drv_flags;
+	np->msg_level = (1 << debug) - 1;
+	np->rx_copybreak = rx_copybreak;
+	np->max_interrupt_work = max_interrupt_work;
+	np->multicast_filter_limit = multicast_filter_limit;
+
+	if (dev->mem_start)
+		option = dev->mem_start;
+
+	if (card_idx < MAX_UNITS  &&  full_duplex[card_idx] > 0)
+		np->full_duplex = 1;
+
+	if (np->full_duplex)
+		np->medialock = 1;
+
+	/* The chip-specific entries in the device structure. */
+	dev->open = &netdev_open;
+	dev->hard_start_xmit = &start_tx;
+	dev->stop = &netdev_close;
+	dev->get_stats = &get_stats;
+	dev->set_multicast_list = &set_rx_mode;
+	dev->do_ioctl = &mii_ioctl;
+	dev->change_mtu = &change_mtu;
+
+	if (1) {
+		int phy, phy_idx = 0;
+		np->phys[0] = 1;		/* Default setting */
+		mii_preamble_required++;
+		for (phy = 1; phy < 32 && phy_idx < 4; phy++) {
+			int mii_status = mdio_read(dev, phy, 1);
+			if (mii_status != 0xffff  &&  mii_status != 0x0000) {
+				np->phys[phy_idx++] = phy;
+				np->advertising = mdio_read(dev, phy, 4);
+				if ((mii_status & 0x0040) == 0)
+					mii_preamble_required++;
+				if (np->msg_level & NETIF_MSG_PROBE)
+					printk(KERN_INFO "%s: MII PHY found at address %d, status "
+						   "0x%4.4x advertising %4.4x.\n",
+						   dev->name, phy, mii_status, np->advertising);
+			}
+		}
+		mii_preamble_required--;
+		np->mii_cnt = phy_idx;
+		if (phy_idx == 0)
+			printk(KERN_INFO "%s: No MII transceiver found!, ASIC status %x\n",
+				   dev->name, (int)readl(ioaddr + ASICCtrl));
+	}
+
+	/* Allow forcing the media type. */
+	if (option > 0) {
+		if (option & 0x220)
+			np->full_duplex = 1;
+		np->default_port = option & 0x3ff;
+		if (np->default_port & 0x330) {
+			np->medialock = 1;
+			if (np->msg_level & NETIF_MSG_PROBE)
+				printk(KERN_INFO "  Forcing %dMbs %s-duplex operation.\n",
+					   (option & 0x300 ? 100 : 10),
+					   (np->full_duplex ? "full" : "half"));
+			if (np->mii_cnt)
+				mdio_write(dev, np->phys[0], 0,
+						   ((option & 0x300) ? 0x2000 : 0) | 	/* 100mbps? */
+						   (np->full_duplex ? 0x0100 : 0)); /* Full duplex? */
+		}
+	}
+
+	/* Reset the chip to erase previous misconfiguration. */
+	if (np->msg_level & NETIF_MSG_MISC)
+		printk("ASIC Control is %x.\n", (int)readl(ioaddr + ASICCtrl));
+	writel(0x007f0000 | readl(ioaddr + ASICCtrl), ioaddr + ASICCtrl);
+	if (np->msg_level & NETIF_MSG_MISC)
+		printk("ASIC Control is now %x.\n", (int)readl(ioaddr + ASICCtrl));
+
+	return dev;
+}
+
+
+
+static int change_mtu(struct net_device *dev, int new_mtu)
+{
+	if ((new_mtu < 68) || (new_mtu > 8191)) /* Limited by RxDMAFrameLen */
+		return -EINVAL;
+	if (netif_running(dev))
+		return -EBUSY;
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+/* Read the EEPROM and MII Management Data I/O (MDIO) interfaces. */
+static int eeprom_read(long ioaddr, int location)
+{
+	int boguscnt = 2000;		/* Typical 190 ticks. */
+	writew(0x0200 | (location & 0xff), ioaddr + EECtrl);
+	do {
+		if (! (readw(ioaddr + EECtrl) & 0x8000)) {
+			return readw(ioaddr + EEData);
+		}
+	} while (--boguscnt > 0);
+	return 0;
+}
+
+/*  MII transceiver control section.
+	Read and write the MII registers using software-generated serial
+	MDIO protocol.  See the MII specifications or DP83840A data sheet
+	for details.
+
+	The maximum data clock rate is 2.5 Mhz.
+	The timing is decoupled from the processor clock by flushing the write
+	from the CPU write buffer with a following read, and using PCI
+	transaction time. */
+#define mdio_in(mdio_addr) readb(mdio_addr)
+#define mdio_out(value, mdio_addr) writeb(value, mdio_addr)
+#define mdio_delay(mdio_addr) readb(mdio_addr)
+
+enum mii_reg_bits {
+	MDIO_ShiftClk=0x0001, MDIO_Data=0x0002, MDIO_EnbOutput=0x0004,
+};
+#define MDIO_EnbIn  (0)
+#define MDIO_WRITE0 (MDIO_EnbOutput)
+#define MDIO_WRITE1 (MDIO_Data | MDIO_EnbOutput)
+
+/* Generate the preamble required for initial synchronization and
+   a few older transceivers. */
+static void mdio_sync(long mdio_addr)
+{
+	int bits = 32;
+
+	/* Establish sync by sending at least 32 logic ones. */
+	while (--bits >= 0) {
+		mdio_out(MDIO_WRITE1, mdio_addr);
+		mdio_delay(mdio_addr);
+		mdio_out(MDIO_WRITE1 | MDIO_ShiftClk, mdio_addr);
+		mdio_delay(mdio_addr);
+	}
+}
+
+static int mdio_read(struct net_device *dev, int phy_id, unsigned int location)
+{
+	long mdio_addr = dev->base_addr + MIICtrl;
+	int mii_cmd = (0xf6 << 10) | (phy_id << 5) | location;
+	int i, retval = 0;
+
+	if (mii_preamble_required)
+		mdio_sync(mdio_addr);
+
+	/* Shift the read command bits out. */
+	for (i = 15; i >= 0; i--) {
+		int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
+
+		mdio_out(dataval, mdio_addr);
+		mdio_delay(mdio_addr);
+		mdio_out(dataval | MDIO_ShiftClk, mdio_addr);
+		mdio_delay(mdio_addr);
+	}
+	/* Read the two transition, 16 data, and wire-idle bits. */
+	for (i = 19; i > 0; i--) {
+		mdio_out(MDIO_EnbIn, mdio_addr);
+		mdio_delay(mdio_addr);
+		retval = (retval << 1) | ((mdio_in(mdio_addr) & MDIO_Data) ? 1 : 0);
+		mdio_out(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
+		mdio_delay(mdio_addr);
+	}
+	return (retval>>1) & 0xffff;
+}
+
+static void mdio_write(struct net_device *dev, int phy_id,
+					   unsigned int location, int value)
+{
+	long mdio_addr = dev->base_addr + MIICtrl;
+	int mii_cmd = (0x5002 << 16) | (phy_id << 23) | (location<<18) | value;
+	int i;
+
+	if (mii_preamble_required)
+		mdio_sync(mdio_addr);
+
+	/* Shift the command bits out. */
+	for (i = 31; i >= 0; i--) {
+		int dataval = (mii_cmd & (1 << i)) ? MDIO_WRITE1 : MDIO_WRITE0;
+
+		mdio_out(dataval, mdio_addr);
+		mdio_delay(mdio_addr);
+		mdio_out(dataval | MDIO_ShiftClk, mdio_addr);
+		mdio_delay(mdio_addr);
+	}
+	/* Clear out extra bits. */
+	for (i = 2; i > 0; i--) {
+		mdio_out(MDIO_EnbIn, mdio_addr);
+		mdio_delay(mdio_addr);
+		mdio_out(MDIO_EnbIn | MDIO_ShiftClk, mdio_addr);
+		mdio_delay(mdio_addr);
+	}
+	return;
+}
+
+
+static int netdev_open(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+
+	MOD_INC_USE_COUNT;
+
+	if (request_irq(dev->irq, &intr_handler, SA_SHIRQ, dev->name, dev)) {
+		MOD_DEC_USE_COUNT;
+		return -EAGAIN;
+	}
+
+	if (np->msg_level & NETIF_MSG_IFUP)
+		printk(KERN_DEBUG "%s: netdev_open() irq %d.\n",
+			   dev->name, dev->irq);
+
+	init_ring(dev);
+
+	if (dev->if_port == 0)
+		dev->if_port = np->default_port;
+
+	np->full_duplex = np->duplex_lock;
+	np->mcastlock = (spinlock_t) SPIN_LOCK_UNLOCKED;
+
+	sundance_start(dev);
+	netif_start_tx_queue(dev);
+
+	if (np->msg_level & NETIF_MSG_IFUP)
+		printk(KERN_DEBUG "%s: Done netdev_open(), status: Rx %x Tx %x "
+			   "MAC Control %x, %4.4x %4.4x.\n",
+			   dev->name, (int)readl(ioaddr + RxStatus),
+			   (int)readw(ioaddr + TxStatus), (int)readl(ioaddr + MACCtrl0),
+			   (int)readw(ioaddr + MACCtrl1), (int)readw(ioaddr + MACCtrl0));
+
+	/* Set the timer to check for link beat. */
+	init_timer(&np->timer);
+	np->timer.expires = jiffies + 3*HZ;
+	np->timer.data = (unsigned long)dev;
+	np->timer.function = &netdev_timer;				/* timer handler */
+	add_timer(&np->timer);
+
+	return 0;
+}
+
+static void sundance_start(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int i;
+
+	/* No reports have indicated that we need to reset the chip. */
+
+	writel(virt_to_bus(&np->rx_ring[np->cur_rx % RX_RING_SIZE]),
+		   ioaddr + RxListPtr);
+	/* The Tx list pointer is written as packets are queued. */
+
+	/* Station address must be written as 16 bit words with the Kendin chip. */
+	for (i = 0; i < 6; i += 2)
+		writew((dev->dev_addr[i + 1] << 8) + dev->dev_addr[i],
+			   ioaddr + StationAddr + i);
+
+	np->link_status = readb(ioaddr + MIICtrl) & 0xE0;
+	writew((np->full_duplex || (np->link_status & 0x20)) ? 0x120 : 0,
+		   ioaddr + MACCtrl0);
+	writew(dev->mtu + 14, ioaddr + MaxFrameSize);
+	if (dev->mtu > 2047)
+		writel(readl(ioaddr + ASICCtrl) | 0x0C, ioaddr + ASICCtrl);
+
+	set_rx_mode(dev);
+	writew(0, ioaddr + DownCounter);
+	/* Set the chip to poll every N*320nsec. */
+	writeb(100, ioaddr + RxDescPoll);
+	writeb(127, ioaddr + TxDescPoll);
+#if 0
+	if (np->drv_flags & KendinPktDropBug)
+		writeb(0x01, ioaddr + DebugCtrl1);
+#endif
+
+	/* Enable interrupts by setting the interrupt mask. */
+	writew(IntrRxDMADone | IntrPCIErr | IntrDrvRqst | IntrTxDone
+		   | StatsMax | LinkChange, ioaddr + IntrEnable);
+	writew(StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
+}
+
+static void check_duplex(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int mii_reg5 = mdio_read(dev, np->phys[0], 5);
+	int negotiated = mii_reg5 & np->advertising;
+	int duplex;
+
+	if (np->duplex_lock  ||  mii_reg5 == 0xffff)
+		return;
+	duplex = (negotiated & 0x0100) || (negotiated & 0x01C0) == 0x0040;
+	if (np->full_duplex != duplex) {
+		np->full_duplex = duplex;
+		if (np->msg_level & NETIF_MSG_LINK)
+			printk(KERN_INFO "%s: Setting %s-duplex based on MII #%d "
+				   "negotiated capability %4.4x.\n", dev->name,
+				   duplex ? "full" : "half", np->phys[0], negotiated);
+		writew(duplex ? 0x20 : 0, ioaddr + MACCtrl0);
+	}
+}
+
+static void netdev_timer(unsigned long data)
+{
+	struct net_device *dev = (struct net_device *)data;
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	int next_tick = 10*HZ;
+
+	if (np->msg_level & NETIF_MSG_TIMER) {
+		printk(KERN_DEBUG "%s: Media selection timer tick, intr status %4.4x, "
+			   "Tx %x Rx %x.\n",
+			   dev->name, (int)readw(ioaddr + IntrEnable),
+			   (int)readw(ioaddr + TxStatus), (int)readl(ioaddr + RxStatus));
+	}
+	/* Note: This does not catch a 0 or 1 element stuck queue. */
+	if (netif_queue_paused(dev)  &&
+		np->cur_tx - np->dirty_tx > 1  &&
+		(jiffies - dev->trans_start) > TX_TIMEOUT) {
+		tx_timeout(dev);
+	}
+	check_duplex(dev);
+	np->timer.expires = jiffies + next_tick;
+	add_timer(&np->timer);
+}
+
+static void tx_timeout(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+
+	printk(KERN_WARNING "%s: Transmit timed out, status %4.4x,"
+		   " resetting...\n", dev->name, (int)readw(ioaddr + TxStatus));
+
+#ifdef __i386__
+	if (np->msg_level & NETIF_MSG_TX_ERR) {
+		int i;
+		printk(KERN_DEBUG "  Rx ring %8.8x: ", (int)np->rx_ring);
+		for (i = 0; i < RX_RING_SIZE; i++)
+			printk(" %8.8x", (unsigned int)np->rx_ring[i].status);
+		printk("\n"KERN_DEBUG"  Tx ring %8.8x: ", (int)np->tx_ring);
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk(" %8.8x", np->tx_ring[i].status);
+		printk("\n");
+	}
+#endif
+
+	/* Perhaps we should reinitialize the hardware here. */
+	dev->if_port = 0;
+	/* Stop and restart the chip's Tx processes . */
+
+	/* Trigger an immediate transmit demand. */
+	writew(IntrRxDMADone | IntrPCIErr | IntrDrvRqst | IntrTxDone
+		   | StatsMax | LinkChange, ioaddr + IntrEnable);
+
+	dev->trans_start = jiffies;
+	np->stats.tx_errors++;
+	return;
+}
+
+
+/* Initialize the Rx and Tx rings, along with various 'dev' bits. */
+static void init_ring(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	int i;
+
+	np->tx_full = 0;
+	np->cur_rx = np->cur_tx = 0;
+	np->dirty_rx = np->dirty_tx = 0;
+
+	np->rx_buf_sz = dev->mtu + 20;
+	if (np->rx_buf_sz < PKT_BUF_SZ)
+		np->rx_buf_sz = PKT_BUF_SZ;
+	np->rx_head_desc = &np->rx_ring[0];
+
+	/* Initialize all Rx descriptors. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		np->rx_ring[i].next_desc = virt_to_le32desc(&np->rx_ring[i+1]);
+		np->rx_ring[i].status = 0;
+		np->rx_ring[i].frag[0].length = 0;
+		np->rx_skbuff[i] = 0;
+	}
+	/* Wrap the ring. */
+	np->rx_ring[i-1].next_desc = virt_to_le32desc(&np->rx_ring[0]);
+
+	/* Fill in the Rx buffers.  Handle allocation failure gracefully. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		struct sk_buff *skb = dev_alloc_skb(np->rx_buf_sz);
+		np->rx_skbuff[i] = skb;
+		if (skb == NULL)
+			break;
+		skb->dev = dev;			/* Mark as being used by this device. */
+		skb_reserve(skb, 2);	/* 16 byte align the IP header. */
+		np->rx_ring[i].frag[0].addr = virt_to_le32desc(skb->tail);
+		np->rx_ring[i].frag[0].length = cpu_to_le32(np->rx_buf_sz | LastFrag);
+	}
+	np->dirty_rx = (unsigned int)(i - RX_RING_SIZE);
+
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		np->tx_skbuff[i] = 0;
+		np->tx_ring[i].status = 0;
+	}
+	return;
+}
+
+static int start_tx(struct sk_buff *skb, struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	struct netdev_desc *txdesc;
+	unsigned entry;
+
+	/* Block a timer-based transmit from overlapping. */
+	if (netif_pause_tx_queue(dev) != 0) {
+		/* This watchdog code is redundant with the media monitor timer. */
+		if (jiffies - dev->trans_start > TX_TIMEOUT)
+			tx_timeout(dev);
+		return 1;
+	}
+
+	/* Note: Ordering is important here, set the field with the
+	   "ownership" bit last, and only then increment cur_tx. */
+
+	/* Calculate the next Tx descriptor entry. */
+	entry = np->cur_tx % TX_RING_SIZE;
+	np->tx_skbuff[entry] = skb;
+	txdesc = &np->tx_ring[entry];
+
+	txdesc->next_desc = 0;
+	/* Note: disable the interrupt generation here before releasing. */
+	txdesc->status =
+		cpu_to_le32((entry<<2) | DescIntrOnDMADone | DescIntrOnTx | 1);
+	txdesc->frag[0].addr = virt_to_le32desc(skb->data);
+	txdesc->frag[0].length = cpu_to_le32(skb->len | LastFrag);
+	if (np->last_tx)
+		np->last_tx->next_desc = virt_to_le32desc(txdesc);
+	np->last_tx = txdesc;
+	np->cur_tx++;
+
+	/* On some architectures: explicitly flush cache lines here. */
+
+	if (np->cur_tx - np->dirty_tx >= TX_QUEUE_LEN - 1) {
+		np->tx_full = 1;
+		/* Check for a just-cleared queue. */
+		if (np->cur_tx - (volatile unsigned int)np->dirty_tx
+			< TX_QUEUE_LEN - 2) {
+			np->tx_full = 0;
+			netif_unpause_tx_queue(dev);
+		} else
+			netif_stop_tx_queue(dev);
+	} else
+		netif_unpause_tx_queue(dev);		/* Typical path */
+
+	/* Side effect: The read wakes the potentially-idle transmit channel. */
+	if (readl(dev->base_addr + TxListPtr) == 0)
+		writel(virt_to_bus(&np->tx_ring[entry]), dev->base_addr + TxListPtr);
+
+	dev->trans_start = jiffies;
+
+	if (np->msg_level & NETIF_MSG_TX_QUEUED) {
+		printk(KERN_DEBUG "%s: Transmit frame #%d len %d queued in slot %d.\n",
+			   dev->name, np->cur_tx, skb->len, entry);
+	}
+	return 0;
+}
+
+/* The interrupt handler does all of the Rx thread work and cleans up
+   after the Tx thread. */
+static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
+{
+	struct net_device *dev = (struct net_device *)dev_instance;
+	struct netdev_private *np;
+	long ioaddr;
+	int boguscnt;
+
+	ioaddr = dev->base_addr;
+	np = (struct netdev_private *)dev->priv;
+	boguscnt = np->max_interrupt_work;
+
+	do {
+		int intr_status = readw(ioaddr + IntrStatus);
+		if ((intr_status & ~IntrRxDone) == 0 || intr_status == 0xffff)
+			break;
+
+		writew(intr_status & (IntrRxDMADone | IntrPCIErr |
+							  IntrDrvRqst |IntrTxDone|IntrTxDMADone |
+							  StatsMax | LinkChange),
+							  ioaddr + IntrStatus);
+
+		if (np->msg_level & NETIF_MSG_INTR)
+			printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
+				   dev->name, intr_status);
+
+		if (intr_status & IntrRxDMADone)
+			netdev_rx(dev);
+
+		if (intr_status & IntrTxDone) {
+			int txboguscnt = 32;
+			int tx_status = readw(ioaddr + TxStatus);
+			while (tx_status & 0x80) {
+				if (np->msg_level & NETIF_MSG_TX_DONE)
+					printk("%s: Transmit status is %4.4x.\n",
+						   dev->name, tx_status);
+				if (tx_status & 0x1e) {
+					if (np->msg_level & NETIF_MSG_TX_ERR)
+						printk("%s: Transmit error status %4.4x.\n",
+							   dev->name, tx_status);
+					np->stats.tx_errors++;
+					if (tx_status & 0x10)  np->stats.tx_fifo_errors++;
+#ifdef ETHER_STATS
+					if (tx_status & 0x08)  np->stats.collisions16++;
+#else
+					if (tx_status & 0x08)  np->stats.collisions++;
+#endif
+					if (tx_status & 0x04)  np->stats.tx_fifo_errors++;
+					if (tx_status & 0x02)  np->stats.tx_window_errors++;
+					/* This reset has not been verified!. */
+					if (tx_status & 0x10) {			/* Reset the Tx. */
+						writel(0x001c0000 | readl(ioaddr + ASICCtrl),
+							   ioaddr + ASICCtrl);
+#if 0					/* Do we need to reset the Tx pointer here? */
+						writel(virt_to_bus(&np->tx_ring[np->dirty_tx]),
+							   dev->base_addr + TxListPtr);
+#endif
+					}
+					if (tx_status & 0x1e) 		/* Restart the Tx. */
+						writew(TxEnable, ioaddr + MACCtrl1);
+				}
+				/* Yup, this is a documentation bug.  It cost me *hours*. */
+				writew(0, ioaddr + TxStatus);
+				if (--txboguscnt < 0)
+					break;
+				tx_status = readw(ioaddr + TxStatus);
+			}
+		}
+		for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
+			int entry = np->dirty_tx % TX_RING_SIZE;
+			if ( ! (np->tx_ring[entry].status & cpu_to_le32(DescTxDMADone)))
+				break;
+			/* Free the original skb. */
+			dev_free_skb_irq(np->tx_skbuff[entry]);
+			np->tx_skbuff[entry] = 0;
+		}
+		if (np->tx_full  &&  np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
+			/* The ring is no longer full, allow new TX entries. */
+			np->tx_full = 0;
+			netif_resume_tx_queue(dev);
+		}
+
+		/* Abnormal error summary/uncommon events handlers. */
+		if (intr_status & (IntrDrvRqst | IntrPCIErr | LinkChange | StatsMax))
+			netdev_error(dev, intr_status);
+
+		if (--boguscnt < 0) {
+			int intr_clear = readw(ioaddr + IntrClear);
+			get_stats(dev);
+			printk(KERN_WARNING "%s: Too much work at interrupt, "
+				   "status=0x%4.4x / 0x%4.4x .. 0x%4.4x.\n",
+				   dev->name, intr_status, intr_clear,
+				   (int)readw(ioaddr + IntrClear));
+			/* Re-enable us in 3.2msec. */
+			writew(1000, ioaddr + DownCounter);
+			writew(IntrDrvRqst, ioaddr + IntrEnable);
+			break;
+		}
+	} while (1);
+
+	if (np->msg_level & NETIF_MSG_INTR)
+		printk(KERN_DEBUG "%s: exiting interrupt, status=%#4.4x.\n",
+			   dev->name, (int)readw(ioaddr + IntrStatus));
+
+	return;
+}
+
+/* This routine is logically part of the interrupt handler, but separated
+   for clarity and better register allocation. */
+static int netdev_rx(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	int entry = np->cur_rx % RX_RING_SIZE;
+	int boguscnt = np->dirty_rx + RX_RING_SIZE - np->cur_rx;
+
+	if (np->msg_level & NETIF_MSG_RX_STATUS) {
+		printk(KERN_DEBUG " In netdev_rx(), entry %d status %4.4x.\n",
+			   entry, np->rx_ring[entry].status);
+	}
+
+	/* If EOP is set on the next entry, it's a new packet. Send it up. */
+	while (np->rx_head_desc->status & cpu_to_le32(DescOwn)) {
+		struct netdev_desc *desc = np->rx_head_desc;
+		u32 frame_status = le32_to_cpu(desc->status);
+		int pkt_len = frame_status & 0x1fff;		/* Chip omits the CRC. */
+
+		if (np->msg_level & NETIF_MSG_RX_STATUS)
+			printk(KERN_DEBUG "  netdev_rx() status was %8.8x.\n",
+				   frame_status);
+		if (--boguscnt < 0)
+			break;
+		if (frame_status & 0x001f4000) {
+			/* There was a error. */
+			if (np->msg_level & NETIF_MSG_RX_ERR)
+				printk(KERN_DEBUG "  netdev_rx() Rx error was %8.8x.\n",
+					   frame_status);
+			np->stats.rx_errors++;
+			if (frame_status & 0x00100000) np->stats.rx_length_errors++;
+			if (frame_status & 0x00010000) np->stats.rx_fifo_errors++;
+			if (frame_status & 0x00060000) np->stats.rx_frame_errors++;
+			if (frame_status & 0x00080000) np->stats.rx_crc_errors++;
+			if (frame_status & 0x00100000) {
+				printk(KERN_WARNING "%s: Oversized Ethernet frame,"
+					   " status %8.8x.\n",
+					   dev->name, frame_status);
+			}
+		} else {
+			struct sk_buff *skb;
+
+#ifndef final_version
+			if (np->msg_level & NETIF_MSG_RX_STATUS)
+				printk(KERN_DEBUG "  netdev_rx() normal Rx pkt length %d"
+					   ", bogus_cnt %d.\n",
+					   pkt_len, boguscnt);
+#endif
+			/* Check if the packet is long enough to accept without copying
+			   to a minimally-sized skbuff. */
+			if (pkt_len < np->rx_copybreak
+				&& (skb = dev_alloc_skb(pkt_len + 2)) != NULL) {
+				skb->dev = dev;
+				skb_reserve(skb, 2);	/* 16 byte align the IP header */
+				eth_copy_and_sum(skb, np->rx_skbuff[entry]->tail, pkt_len, 0);
+				skb_put(skb, pkt_len);
+			} else {
+				skb_put(skb = np->rx_skbuff[entry], pkt_len);
+				np->rx_skbuff[entry] = NULL;
+			}
+			skb->protocol = eth_type_trans(skb, dev);
+			/* Note: checksum -> skb->ip_summed = CHECKSUM_UNNECESSARY; */
+			netif_rx(skb);
+			dev->last_rx = jiffies;
+		}
+		entry = (++np->cur_rx) % RX_RING_SIZE;
+		np->rx_head_desc = &np->rx_ring[entry];
+	}
+
+	/* Refill the Rx ring buffers. */
+	for (; np->cur_rx - np->dirty_rx > 0; np->dirty_rx++) {
+		struct sk_buff *skb;
+		entry = np->dirty_rx % RX_RING_SIZE;
+		if (np->rx_skbuff[entry] == NULL) {
+			skb = dev_alloc_skb(np->rx_buf_sz);
+			np->rx_skbuff[entry] = skb;
+			if (skb == NULL)
+				break;				/* Better luck next round. */
+			skb->dev = dev;			/* Mark as being used by this device. */
+			skb_reserve(skb, 2);	/* Align IP on 16 byte boundaries */
+			np->rx_ring[entry].frag[0].addr = virt_to_le32desc(skb->tail);
+		}
+		/* Perhaps we need not reset this field. */
+		np->rx_ring[entry].frag[0].length =
+			cpu_to_le32(np->rx_buf_sz | LastFrag);
+		np->rx_ring[entry].status = 0;
+	}
+
+	/* No need to restart Rx engine, it will poll. */
+	return 0;
+}
+
+static void netdev_error(struct net_device *dev, int intr_status)
+{
+	long ioaddr = dev->base_addr;
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+
+	if (intr_status & IntrDrvRqst) {
+		/* Stop the down counter and turn interrupts back on. */
+		printk(KERN_WARNING "%s: Turning interrupts back on.\n", dev->name);
+		writew(0, ioaddr + DownCounter);
+		writew(IntrRxDMADone | IntrPCIErr | IntrDrvRqst |
+			   IntrTxDone | StatsMax | LinkChange, ioaddr + IntrEnable);
+	}
+	if (intr_status & LinkChange) {
+		int new_status = readb(ioaddr + MIICtrl) & 0xE0;
+		if (np->msg_level & NETIF_MSG_LINK)
+			printk(KERN_NOTICE "%s: Link changed: Autonegotiation advertising"
+				   " %4.4x  partner %4.4x.\n", dev->name,
+				   mdio_read(dev, np->phys[0], 4),
+				   mdio_read(dev, np->phys[0], 5));
+		if ((np->link_status ^ new_status) & 0x80) {
+			if (new_status & 0x80)
+				netif_link_up(dev);
+			else
+				netif_link_down(dev);
+		}
+		np->link_status = new_status;
+		check_duplex(dev);
+	}
+	if (intr_status & StatsMax) {
+		get_stats(dev);
+	}
+	if (intr_status & IntrPCIErr) {
+		printk(KERN_ERR "%s: Something Wicked happened! %4.4x.\n",
+			   dev->name, intr_status);
+		/* We must do a global reset of DMA to continue. */
+	}
+}
+
+static struct net_device_stats *get_stats(struct net_device *dev)
+{
+	long ioaddr = dev->base_addr;
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	int i;
+
+	if (readw(ioaddr + StationAddr) == 0xffff)
+		return &np->stats;
+
+	/* We do not spinlock statistics.
+	   A window only exists if we have non-atomic adds, the error counts
+	   are typically zero, and statistics are non-critical. */ 
+	np->stats.rx_missed_errors	+= readb(ioaddr + RxMissed);
+	np->stats.tx_packets += readw(ioaddr + TxFramesOK);
+	np->stats.rx_packets += readw(ioaddr + RxFramesOK);
+	np->stats.collisions += readb(ioaddr + StatsLateColl);
+	np->stats.collisions += readb(ioaddr + StatsMultiColl);
+	np->stats.collisions += readb(ioaddr + StatsOneColl);
+	readb(ioaddr + StatsCarrierError);
+	readb(ioaddr + StatsTxDefer);
+	for (i = StatsTxXSDefer; i <= StatsMcastRx; i++)
+		readb(ioaddr + i);
+#if LINUX_VERSION_CODE > 0x20127
+	np->stats.tx_bytes += readw(ioaddr + TxOctetsLow);
+	np->stats.tx_bytes += readw(ioaddr + TxOctetsHigh) << 16;
+	np->stats.rx_bytes += readw(ioaddr + RxOctetsLow);
+	np->stats.rx_bytes += readw(ioaddr + RxOctetsHigh) << 16;
+#else
+	readw(ioaddr + TxOctetsLow);
+	readw(ioaddr + TxOctetsHigh);
+	readw(ioaddr + RxOctetsLow);
+	readw(ioaddr + RxOctetsHigh);
+#endif
+
+	return &np->stats;
+}
+
+/* The little-endian AUTODIN II ethernet CRC calculations.
+   A big-endian version is also available.
+   This is slow but compact code.  Do not use this routine for bulk data,
+   use a table-based routine instead.
+   This is common code and should be moved to net/core/crc.c.
+   Chips may use the upper or lower CRC bits, and may reverse and/or invert
+   them.  Select the endian-ness that results in minimal calculations.
+*/
+static unsigned const ethernet_polynomial_le = 0xedb88320U;
+static inline unsigned ether_crc_le(int length, unsigned char *data)
+{
+	unsigned int crc = ~0;	/* Initial value. */
+	while(--length >= 0) {
+		unsigned char current_octet = *data++;
+		int bit;
+		for (bit = 8; --bit >= 0; current_octet >>= 1) {
+			if ((crc ^ current_octet) & 1) {
+				crc >>= 1;
+				crc ^= ethernet_polynomial_le;
+			} else
+				crc >>= 1;
+		}
+	}
+	return crc;
+}
+
+static void set_rx_mode(struct net_device *dev)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+	u16 mc_filter[4];			/* Multicast hash filter */
+	u32 rx_mode;
+	int i;
+
+	if (dev->flags & IFF_PROMISC) {			/* Set promiscuous. */
+		/* Unconditionally log net taps. */
+		printk(KERN_NOTICE "%s: Promiscuous mode enabled.\n", dev->name);
+		memset(mc_filter, ~0, sizeof(mc_filter));
+		rx_mode = AcceptBroadcast | AcceptMulticast | AcceptAll | AcceptMyPhys;
+	} else if ((dev->mc_count > np->multicast_filter_limit)
+			   ||  (dev->flags & IFF_ALLMULTI)) {
+		/* Too many to match, or accept all multicasts. */
+		memset(mc_filter, 0xff, sizeof(mc_filter));
+		rx_mode = AcceptBroadcast | AcceptMulticast | AcceptMyPhys;
+	} else if (dev->mc_count) {
+		struct dev_mc_list *mclist;
+		memset(mc_filter, 0, sizeof(mc_filter));
+		for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+			 i++, mclist = mclist->next) {
+			set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) & 0x3f,
+					mc_filter);
+		}
+		rx_mode = AcceptBroadcast | AcceptMultiHash | AcceptMyPhys;
+	} else {
+		writeb(AcceptBroadcast | AcceptMyPhys, ioaddr + RxMode);
+		return;
+	}
+	for (i = 0; i < 4; i++)
+		writew(mc_filter[i], ioaddr + MulticastFilter0 + i*2);
+	writeb(rx_mode, ioaddr + RxMode);
+}
+
+static int mii_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	u16 *data = (u16 *)&rq->ifr_data;
+	u32 *data32 = (void *)&rq->ifr_data;
+
+	switch(cmd) {
+	case 0x8947: case 0x89F0:
+		/* SIOCGMIIPHY: Get the address of the PHY in use. */
+		data[0] = np->phys[0] & 0x1f;
+		/* Fall Through */
+	case 0x8948: case 0x89F1:
+		/* SIOCGMIIREG: Read the specified MII register. */
+		data[3] = mdio_read(dev, data[0] & 0x1f, data[1] & 0x1f);
+		return 0;
+	case 0x8949: case 0x89F2:
+		/* SIOCSMIIREG: Write the specified MII register */
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		if (data[0] == np->phys[0]) {
+			u16 value = data[2];
+			switch (data[1]) {
+			case 0:
+				/* Check for autonegotiation on or reset. */
+				np->medialock = (value & 0x9000) ? 0 : 1;
+				if (np->medialock)
+					np->full_duplex = (value & 0x0100) ? 1 : 0;
+				break;
+			case 4: np->advertising = value; break;
+			}
+			/* Perhaps check_duplex(dev), depending on chip semantics. */
+		}
+		mdio_write(dev, data[0] & 0x1f, data[1] & 0x1f, data[2]);
+		return 0;
+	case SIOCGPARAMS:
+		data32[0] = np->msg_level;
+		data32[1] = np->multicast_filter_limit;
+		data32[2] = np->max_interrupt_work;
+		data32[3] = np->rx_copybreak;
+		return 0;
+	case SIOCSPARAMS:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+		np->msg_level = data32[0];
+		np->multicast_filter_limit = data32[1];
+		np->max_interrupt_work = data32[2];
+		np->rx_copybreak = data32[3];
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int sundance_pwr_event(void *dev_instance, int event)
+{
+	struct net_device *dev = dev_instance;
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	long ioaddr = dev->base_addr;
+
+	if (np->msg_level & NETIF_MSG_LINK)
+		printk(KERN_DEBUG "%s: Handling power event %d.\n", dev->name, event);
+	switch(event) {
+	case DRV_ATTACH:
+		MOD_INC_USE_COUNT;
+		break;
+	case DRV_SUSPEND:
+		/* Disable interrupts, stop Tx and Rx. */
+		writew(0x0000, ioaddr + IntrEnable);
+		writew(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
+		break;
+	case DRV_RESUME:
+		sundance_start(dev);
+		break;
+	case DRV_DETACH: {
+		struct net_device **devp, **next;
+		if (dev->flags & IFF_UP) {
+			/* Some, but not all, kernel versions close automatically. */
+			dev_close(dev);
+			dev->flags &= ~(IFF_UP|IFF_RUNNING);
+		}
+		unregister_netdev(dev);
+		release_region(dev->base_addr, pci_id_tbl[np->chip_id].io_size);
+#ifndef USE_IO_OPS
+		iounmap((char *)dev->base_addr);
+#endif
+		for (devp = &root_net_dev; *devp; devp = next) {
+			next = &((struct netdev_private *)(*devp)->priv)->next_module;
+			if (*devp == dev) {
+				*devp = *next;
+				break;
+			}
+		}
+		if (np->priv_addr)
+			kfree(np->priv_addr);
+		kfree(dev);
+		MOD_DEC_USE_COUNT;
+		break;
+	}
+	case DRV_PWR_WakeOn:
+		writeb(readb(ioaddr + WakeEvent) | 2, ioaddr + WakeEvent);
+		/* Fall through. */
+	case DRV_PWR_DOWN:
+	case DRV_PWR_UP:
+		acpi_set_pwr_state(np->pci_dev, event==DRV_PWR_UP ? ACPI_D0:ACPI_D3);
+		break;
+	default:
+		return -1;
+	}
+
+	return 0;
+}
+
+static int netdev_close(struct net_device *dev)
+{
+	long ioaddr = dev->base_addr;
+	struct netdev_private *np = (struct netdev_private *)dev->priv;
+	int i;
+
+	netif_stop_tx_queue(dev);
+
+	if (np->msg_level & NETIF_MSG_IFDOWN) {
+		printk(KERN_DEBUG "%s: Shutting down ethercard, status was Tx %2.2x "
+			   "Rx %4.4x Int %2.2x.\n",
+			   dev->name, (int)readw(ioaddr + TxStatus),
+			   (int)readl(ioaddr + RxStatus), (int)readw(ioaddr + IntrStatus));
+		printk(KERN_DEBUG "%s: Queue pointers were Tx %d / %d,  Rx %d / %d.\n",
+			   dev->name, np->cur_tx, np->dirty_tx, np->cur_rx, np->dirty_rx);
+	}
+
+	/* Disable interrupts by clearing the interrupt mask. */
+	writew(0x0000, ioaddr + IntrEnable);
+
+	/* Stop the chip's Tx and Rx processes. */
+	writew(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
+
+	del_timer(&np->timer);
+
+#ifdef __i386__
+	if (np->msg_level & NETIF_MSG_IFDOWN) {
+		printk("\n"KERN_DEBUG"  Tx ring at %8.8x:\n",
+			   (int)virt_to_bus(np->tx_ring));
+		for (i = 0; i < TX_RING_SIZE; i++)
+			printk(" #%d desc. %4.4x %8.8x %8.8x.\n",
+				   i, np->tx_ring[i].status, np->tx_ring[i].frag[0].addr,
+				   np->tx_ring[i].frag[0].length);
+		printk("\n"KERN_DEBUG "  Rx ring %8.8x:\n",
+			   (int)virt_to_bus(np->rx_ring));
+		for (i = 0; i < /*RX_RING_SIZE*/4 ; i++) {
+			printk(KERN_DEBUG " #%d desc. %4.4x %4.4x %8.8x\n",
+				   i, np->rx_ring[i].status, np->rx_ring[i].frag[0].addr,
+				   np->rx_ring[i].frag[0].length);
+		}
+	}
+#endif /* __i386__ debugging only */
+
+	free_irq(dev->irq, dev);
+
+	/* Free all the skbuffs in the Rx queue. */
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		np->rx_ring[i].status = 0;
+		np->rx_ring[i].frag[0].addr = 0xBADF00D0; /* An invalid address. */
+		if (np->rx_skbuff[i]) {
+#if LINUX_VERSION_CODE < 0x20100
+			np->rx_skbuff[i]->free = 1;
+#endif
+			dev_free_skb(np->rx_skbuff[i]);
+		}
+		np->rx_skbuff[i] = 0;
+	}
+	for (i = 0; i < TX_RING_SIZE; i++) {
+		if (np->tx_skbuff[i])
+			dev_free_skb(np->tx_skbuff[i]);
+		np->tx_skbuff[i] = 0;
+	}
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+
+#ifdef MODULE
+int init_module(void)
+{
+	if (debug >= NETIF_MSG_DRV)	/* Emit version even if no cards detected. */
+		printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
+	return pci_drv_register(&sundance_drv_id, NULL);
+}
+
+void cleanup_module(void)
+{
+	struct net_device *next_dev;
+
+	pci_drv_unregister(&sundance_drv_id);
+
+	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */
+	while (root_net_dev) {
+		struct netdev_private *np = (void *)(root_net_dev->priv);
+		unregister_netdev(root_net_dev);
+#ifdef USE_IO_OPS
+		release_region(root_net_dev->base_addr,
+					   pci_id_tbl[np->chip_id].io_size);
+#else
+		iounmap((char *)root_net_dev->base_addr);
+#endif
+		next_dev = np->next_module;
+		if (np->priv_addr)
+			kfree(np->priv_addr);
+		kfree(root_net_dev);
+		root_net_dev = next_dev;
+	}
+}
+
+#endif  /* MODULE */
+
+/*
+ * Local variables:
+ *  compile-command: "make KERNVER=`uname -r` sundance.o"
+ *  compile-cmd1: "gcc -DMODULE -Wall -Wstrict-prototypes -O6 -c sundance.c"
+ *  simple-compile-command: "gcc -DMODULE -O6 -c sundance.c"
+ *  c-indent-level: 4
+ *  c-basic-offset: 4
+ *  tab-width: 4
+ * End:
+ */