/* ne2k-pci.c: A NE2000 clone on PCI bus driver for Linux. *//*	A Linux device driver for PCI NE2000 clones.	Authorship and other copyrights:	1992-1998 by Donald Becker, NE2000 core and various modifications.	1995-1998 by Paul Gortmaker, core modifications and PCI support.	Copyright 1993 assigned to the United States Government as represented	by the Director, National Security Agency.	This software may be used and distributed according to the terms	of the GNU Public License, incorporated herein by reference.	The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O	Center of Excellence in Space Data and Information Sciences	Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771	People are making PCI ne2000 clones! Oh the horror, the horror...	Issues remaining:	No full-duplex support.*//* Our copyright info must remain in the binary. */static const char *version ="ne2k-pci.c:v0.99L 2/7/98 D. Becker/P. Gortmaker http://cesdis.gsfc.nasa.gov/linux/drivers/ne2k-pci.html\n";#ifdef MODVERSIONS#include <linux/modversions.h>#endif#include <linux/module.h>#include <linux/kernel.h>#include <linux/sched.h>#include <linux/errno.h>#include <linux/pci.h>#include <linux/bios32.h>#include <asm/system.h>#include <asm/io.h>#include <asm/irq.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include "8390.h"/* Set statically or when loading the driver module. */static int debug = 1;/* Some defines that people can play with if so inclined. *//* Do #define LOAD_8390_BY_KERNELD to automatically load 8390 support. */#ifdef LOAD_8390_BY_KERNELD#include <linux/kerneld.h>#endif/* Use 32 bit data-movement operations instead of 16 bit. */#define USE_LONGIO/* Do we implement the read before write bugfix ? *//* #define NE_RW_BUGFIX *//* Do we have a non std. amount of memory? (in units of 256 byte pages) *//* #define PACKETBUF_MEMSIZE	0x40 */static struct {	unsigned short vendor, dev_id;	char *name;}pci_clone_list[] = {	{0x10ec, 0x8029, "RealTek RTL-8029"},	{0x1050, 0x0940, "Winbond 89C940"},	{0x11f6, 0x1401, "Compex RL2000"},	{0x8e2e, 0x3000, "KTI ET32P2"},	{0x4a14, 0x5000, "NetVin NV5000SC"},	{0x1106, 0x0926, "Via 82C926"},	{0,}};/* ---- No user-serviceable parts below ---- */#define NE_BASE	 (dev->base_addr)#define NE_CMD	 	0x00#define NE_DATAPORT	0x10	/* NatSemi-defined port window offset. */#define NE_RESET	0x1f	/* Issue a read to reset, a write to clear. */#define NE_IO_EXTENT	0x20#define NESM_START_PG	0x40	/* First page of TX buffer */#define NESM_STOP_PG	0x80	/* Last page +1 of RX ring */int ne2k_pci_probe(struct device *dev);static struct device *ne2k_pci_probe1(struct device *dev, int ioaddr, int irq);static int ne_open(struct device *dev);static int ne_close(struct device *dev);static void ne_reset_8390(struct device *dev);static void ne_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,			  int ring_page);static void ne_block_input(struct device *dev, int count,			  struct sk_buff *skb, int ring_offset);static void ne_block_output(struct device *dev, const int count,		const unsigned char *buf, const int start_page);/* No room in the standard 8390 structure for extra info we need. */struct ne2k_pci_card {	struct ne2k_pci_card *next;	struct device *dev;	unsigned char pci_bus, pci_device_fn;};/* A list of all installed devices, for removing the driver module. */static struct ne2k_pci_card *ne2k_card_list = NULL;#ifdef LOAD_8390_BY_KERNELDstatic int (*Lethdev_init)(struct device *dev);static void (*LNS8390_init)(struct device *dev, int startp);static int (*Lei_open)(struct device *dev);static int (*Lei_close)(struct device *dev);static void (*Lei_interrupt)(int irq, void *dev_id, struct pt_regs *regs);#else#define Lethdev_init ethdev_init#define LNS8390_init NS8390_init#define Lei_open ei_open#define Lei_close ei_close#define Lei_interrupt ei_interrupt#endif#ifdef MODULEintinit_module(void){	/* We must emit version information. */	if (debug)		printk(KERN_INFO "%s", version);	return ne2k_pci_probe(0);}voidcleanup_module(void){	struct device *dev;	struct ne2k_pci_card *this_card;	/* No need to check MOD_IN_USE, as sys_delete_module() checks. */	while (ne2k_card_list) {		dev = ne2k_card_list->dev;		unregister_netdev(dev);		release_region(dev->base_addr, NE_IO_EXTENT);		kfree(dev);		this_card = ne2k_card_list;		ne2k_card_list = ne2k_card_list->next;		kfree(this_card);	}#ifdef LOAD_8390_BY_KERNELD	release_module("8390", 0);#endif}#endif  /* MODULE *//*  NEx000-clone boards have a Station Address (SA) PROM (SAPROM) in the packet  buffer memory space.  By-the-spec NE2000 clones have 0x57,0x57 in bytes  0x0e,0x0f of the SAPROM, while other supposed NE2000 clones must be  detected by their SA prefix.  Reading the SAPROM from a word-wide card with the 8390 set in byte-wide  mode results in doubled values, which can be detected and compensated for.  The probe is also responsible for initializing the card and filling  in the 'dev' and 'ei_status' structures.*/#ifdef HAVE_DEVLISTstruct netdev_entry netcard_drv ={"ne2k_pci", ne2k_pci_probe1, NE_IO_EXTENT, 0};#endifint ne2k_pci_probe(struct device *dev){	static int pci_index = 0;	/* Static, for multiple calls. */	int cards_found = 0;	int i;	if ( ! pcibios_present())		return -ENODEV;	for (;pci_index < 0xff; pci_index++) {		unsigned char pci_bus, pci_device_fn;		u8 pci_irq_line;		u16 pci_command, new_command, vendor, device;		u32 pci_ioaddr;		if (pcibios_find_class (PCI_CLASS_NETWORK_ETHERNET << 8, pci_index,								&pci_bus, &pci_device_fn)			!= PCIBIOS_SUCCESSFUL)			break;		pcibios_read_config_word(pci_bus, pci_device_fn,								 PCI_VENDOR_ID, &vendor);		pcibios_read_config_word(pci_bus, pci_device_fn,								 PCI_DEVICE_ID, &device);		/* Note: some vendor IDs (RealTek) have non-NE2k cards as well. */		for (i = 0; pci_clone_list[i].vendor != 0; i++)			if (pci_clone_list[i].vendor == vendor				&& pci_clone_list[i].dev_id == device)				break;		if (pci_clone_list[i].vendor == 0)			continue;#ifndef MODULE		{			static unsigned version_printed = 0;			if (version_printed++ == 0)				printk(KERN_INFO "%s", version);		}#endif		pcibios_read_config_dword(pci_bus, pci_device_fn,								  PCI_BASE_ADDRESS_0, &pci_ioaddr);		pcibios_read_config_byte(pci_bus, pci_device_fn,								 PCI_INTERRUPT_LINE, &pci_irq_line);		pcibios_read_config_word(pci_bus, pci_device_fn,								 PCI_COMMAND, &pci_command);		/* Remove I/O space marker in bit 0. */		pci_ioaddr &= PCI_BASE_ADDRESS_IO_MASK;		/* Avoid already found cards from previous calls */		if (check_region(pci_ioaddr, NE_IO_EXTENT))			continue;		/* Activate the card: fix for brain-damaged Win98 BIOSes. */		new_command = pci_command | PCI_COMMAND_IO;		if (pci_command != new_command) {			printk(KERN_INFO "  The PCI BIOS has not enabled this"				   " NE2k clone!  Updating PCI command %4.4x->%4.4x.\n",				   pci_command, new_command);			pcibios_write_config_word(pci_bus, pci_device_fn,									  PCI_COMMAND, new_command);		}		if (pci_irq_line <= 0 || pci_irq_line >= NR_IRQS)			printk(KERN_WARNING " WARNING: The PCI BIOS assigned this PCI NE2k"				   " card to IRQ %d, which is unlikely to work!.\n"				   KERN_WARNING " You should use the PCI BIOS setup to assign"				   " a valid IRQ line.\n", pci_irq_line);		printk("ne2k-pci.c: PCI NE2000 clone '%s' at I/O %#x, IRQ %d.\n",			   pci_clone_list[i].name, pci_ioaddr, pci_irq_line);		dev = ne2k_pci_probe1(dev, pci_ioaddr, pci_irq_line);		if (dev == 0) {			/* Should not happen. */			printk(KERN_ERR "ne2k-pci: Probe of PCI card at %#x failed.\n",				   pci_ioaddr);			continue;		} else {			struct ne2k_pci_card *ne2k_card =				kmalloc(sizeof(struct ne2k_pci_card), GFP_KERNEL);			ne2k_card->next = ne2k_card_list;			ne2k_card_list = ne2k_card;			ne2k_card->dev = dev;			ne2k_card->pci_bus = pci_bus;			ne2k_card->pci_device_fn = pci_device_fn;		}		dev = 0;		cards_found++;	}	return cards_found ? 0 : -ENODEV;}static struct device *ne2k_pci_probe1(struct device *dev, int ioaddr, int irq){	int i;	unsigned char SA_prom[32];	const char *name = NULL;	int start_page, stop_page;	int reg0 = inb(ioaddr);	if (reg0 == 0xFF)		return 0;	/* Do a preliminary verification that we have a 8390. */	{		int regd;		outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);		regd = inb(ioaddr + 0x0d);		outb(0xff, ioaddr + 0x0d);		outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);		inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */		if (inb(ioaddr + EN0_COUNTER0) != 0) {			outb(reg0, ioaddr);			outb(regd, ioaddr + 0x0d);	/* Restore the old values. */			return 0;		}	}	dev = init_etherdev(dev, 0);	/* Reset card. Who knows what dain-bramaged state it was left in. */	{		unsigned long reset_start_time = jiffies;		outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);		/* This looks like a horrible timing loop, but it should never take		   more than a few cycles.		*/		while ((inb(ioaddr + EN0_ISR) & ENISR_RESET) == 0)			/* Limit wait: '2' avoids jiffy roll-over. */			if (jiffies - reset_start_time > 2) {				printk("ne2k-pci: Card failure (no reset ack).\n");				return 0;			}				outb(0xff, ioaddr + EN0_ISR);		/* Ack all intr. */