/* smc-ultra.c: A SMC Ultra ethernet driver for linux. *//*	This is a driver for the SMC Ultra and SMC EtherEZ ISA ethercards.	Written 1993-1998 by Donald Becker.	Copyright 1993 United States Government as represented by the	Director, National Security Agency.	This software may be used and distributed according to the terms	of the GNU General Public License, incorporated herein by reference.	The author may be reached as becker@scyld.com, or C/O	Scyld Computing Corporation	410 Severn Ave., Suite 210	Annapolis MD 21403	This driver uses the cards in the 8390-compatible mode.	Most of the run-time complexity is handled by the generic code in	8390.c.  The code in this file is responsible for		ultra_probe()	 	Detecting and initializing the card.		ultra_probe1()		ultra_probe_isapnp()		ultra_open()		The card-specific details of starting, stopping		ultra_reset_8390()	and resetting the 8390 NIC core.		ultra_close()		ultra_block_input()		Routines for reading and writing blocks of		ultra_block_output()	packet buffer memory.		ultra_pio_input()		ultra_pio_output()	This driver enables the shared memory only when doing the actual data	transfers to avoid a bug in early version of the card that corrupted	data transferred by a AHA1542.	This driver now supports the programmed-I/O (PIO) data transfer mode of	the EtherEZ. It does not use the non-8390-compatible "Altego" mode.	That support (if available) is in smc-ez.c.	Changelog:	Paul Gortmaker	: multiple card support for module users.	Donald Becker	: 4/17/96 PIO support, minor potential problems avoided.	Donald Becker	: 6/6/96 correctly set auto-wrap bit.	Alexander Sotirov : 1/20/01 Added support for ISAPnP cards	Note about the ISA PnP support:	This driver can not autoprobe for more than one SMC EtherEZ PnP card.	You have to configure the second card manually through the /proc/isapnp	interface and then load the module with an explicit io=0x___ option.*/static const char version[] =	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";#include <linux/config.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/init.h>#include <linux/isapnp.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include <asm/io.h>#include <asm/system.h>#include "8390.h"#define DRV_NAME "smc-ultra"/* A zero-terminated list of I/O addresses to be probed. */static unsigned int ultra_portlist[] __initdata ={0x200, 0x220, 0x240, 0x280, 0x300, 0x340, 0x380, 0};static int ultra_probe1(struct net_device *dev, int ioaddr);#ifdef __ISAPNP__static int ultra_probe_isapnp(struct net_device *dev);#endifstatic int ultra_open(struct net_device *dev);static void ultra_reset_8390(struct net_device *dev);static void ultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,						int ring_page);static void ultra_block_input(struct net_device *dev, int count,						  struct sk_buff *skb, int ring_offset);static void ultra_block_output(struct net_device *dev, int count,							const unsigned char *buf, const int start_page);static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,						int ring_page);static void ultra_pio_input(struct net_device *dev, int count,						  struct sk_buff *skb, int ring_offset);static void ultra_pio_output(struct net_device *dev, int count,							 const unsigned char *buf, const int start_page);static int ultra_close_card(struct net_device *dev);#ifdef __ISAPNP__static struct isapnp_device_id ultra_device_ids[] __initdata = {        {       ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),                ISAPNP_VENDOR('S','M','C'), ISAPNP_FUNCTION(0x8416),                (long) "SMC EtherEZ (8416)" },        { }	/* terminate list */};MODULE_DEVICE_TABLE(isapnp, ultra_device_ids);#endif#define START_PG		0x00	/* First page of TX buffer */#define ULTRA_CMDREG	0		/* Offset to ASIC command register. */#define	 ULTRA_RESET	0x80	/* Board reset, in ULTRA_CMDREG. */#define	 ULTRA_MEMENB	0x40	/* Enable the shared memory. */#define IOPD	0x02			/* I/O Pipe Data (16 bits), PIO operation. */#define IOPA	0x07			/* I/O Pipe Address for PIO operation. */#define ULTRA_NIC_OFFSET  16	/* NIC register offset from the base_addr. */#define ULTRA_IO_EXTENT 32#define EN0_ERWCNT		0x08	/* Early receive warning count. */#ifdef CONFIG_NET_POLL_CONTROLLERstatic void ultra_poll(struct net_device *dev){	disable_irq(dev->irq);	ei_interrupt(dev->irq, dev, NULL);	enable_irq(dev->irq);}#endif/*	Probe for the Ultra.  This looks like a 8013 with the station	address PROM at I/O ports <base>+8 to <base>+13, with a checksum	following.*/static int __init do_ultra_probe(struct net_device *dev){	int i;	int base_addr = dev->base_addr;	int irq = dev->irq;	SET_MODULE_OWNER(dev);#ifdef CONFIG_NET_POLL_CONTROLLER	dev->poll_controller = &ultra_poll;#endif	if (base_addr > 0x1ff)		/* Check a single specified location. */		return ultra_probe1(dev, base_addr);	else if (base_addr != 0)	/* Don't probe at all. */		return -ENXIO;#ifdef __ISAPNP__	/* Look for any installed ISAPnP cards */	if (isapnp_present() && (ultra_probe_isapnp(dev) == 0))		return 0;	printk(KERN_NOTICE "smc-ultra.c: No ISAPnP cards found, trying standard ones...\n");#endif	for (i = 0; ultra_portlist[i]; i++) {		dev->irq = irq;		if (ultra_probe1(dev, ultra_portlist[i]) == 0)			return 0;	}	return -ENODEV;}static void cleanup_card(struct net_device *dev){	/* NB: ultra_close_card() does free_irq */#ifdef __ISAPNP__	struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;	if (idev)		pnp_device_detach(idev);#endif	release_region(dev->base_addr - ULTRA_NIC_OFFSET, ULTRA_IO_EXTENT);}#ifndef MODULEstruct net_device * __init ultra_probe(int unit){	struct net_device *dev = alloc_ei_netdev();	int err;	if (!dev)		return ERR_PTR(-ENOMEM);	sprintf(dev->name, "eth%d", unit);	netdev_boot_setup_check(dev);	err = do_ultra_probe(dev);	if (err)		goto out;	err = register_netdev(dev);	if (err)		goto out1;	return dev;out1:	cleanup_card(dev);out:	free_netdev(dev);	return ERR_PTR(err);}#endifstatic int __init ultra_probe1(struct net_device *dev, int ioaddr){	int i, retval;	int checksum = 0;	const char *model_name;	unsigned char eeprom_irq = 0;	static unsigned version_printed;	/* Values from various config regs. */	unsigned char num_pages, irqreg, addr, piomode;	unsigned char idreg = inb(ioaddr + 7);	unsigned char reg4 = inb(ioaddr + 4) & 0x7f;	if (!request_region(ioaddr, ULTRA_IO_EXTENT, DRV_NAME))		return -EBUSY;	/* Check the ID nibble. */	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */		&& (idreg & 0xF0) != 0x40) {		/* SMC EtherEZ */		retval = -ENODEV;		goto out;	}	/* Select the station address register set. */	outb(reg4, ioaddr + 4);	for (i = 0; i < 8; i++)		checksum += inb(ioaddr + 8 + i);	if ((checksum & 0xff) != 0xFF) {		retval = -ENODEV;		goto out;	}	if (ei_debug  &&  version_printed++ == 0)		printk(version);	model_name = (idreg & 0xF0) == 0x20 ? "SMC Ultra" : "SMC EtherEZ";	printk("%s: %s at %#3x,", dev->name, model_name, ioaddr);	for (i = 0; i < 6; i++)		printk(" %2.2X", dev->dev_addr[i] = inb(ioaddr + 8 + i));	/* Switch from the station address to the alternate register set and	   read the useful registers there. */	outb(0x80 | reg4, ioaddr + 4);	/* Enabled FINE16 mode to avoid BIOS ROM width mismatches @ reboot. */	outb(0x80 | inb(ioaddr + 0x0c), ioaddr + 0x0c);	piomode = inb(ioaddr + 0x8);	addr = inb(ioaddr + 0xb);	irqreg = inb(ioaddr + 0xd);	/* Switch back to the station address register set so that the MS-DOS driver	   can find the card after a warm boot. */	outb(reg4, ioaddr + 4);	if (dev->irq < 2) {		unsigned char irqmap[] = {0, 9, 3, 5, 7, 10, 11, 15};		int irq;		/* The IRQ bits are split. */		irq = irqmap[((irqreg & 0x40) >> 4) + ((irqreg & 0x0c) >> 2)];		if (irq == 0) {			printk(", failed to detect IRQ line.\n");			retval =  -EAGAIN;			goto out;		}		dev->irq = irq;		eeprom_irq = 1;	}	/* The 8390 isn't at the base address, so fake the offset */	dev->base_addr = ioaddr+ULTRA_NIC_OFFSET;	{		int addr_tbl[4] = {0x0C0000, 0x0E0000, 0xFC0000, 0xFE0000};		short num_pages_tbl[4] = {0x20, 0x40, 0x80, 0xff};		dev->mem_start = ((addr & 0x0f) << 13) + addr_tbl[(addr >> 6) & 3] ;		num_pages = num_pages_tbl[(addr >> 4) & 3];	}	ei_status.name = model_name;	ei_status.word16 = 1;	ei_status.tx_start_page = START_PG;	ei_status.rx_start_page = START_PG + TX_PAGES;	ei_status.stop_page = num_pages;	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;	dev->mem_end = ei_status.rmem_end		= dev->mem_start + (ei_status.stop_page - START_PG)*256;	if (piomode) {		printk(",%s IRQ %d programmed-I/O mode.\n",			   eeprom_irq ? "EEPROM" : "assigned ", dev->irq);		ei_status.block_input = &ultra_pio_input;