/* 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 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	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_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.*/static const char *version =	"smc-ultra.c:v2.02 2/3/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";#include <linux/module.h>#include <linux/kernel.h>#include <linux/sched.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/init.h>#include <asm/io.h>#include <asm/system.h>#include <linux/netdevice.h>#include <linux/etherdevice.h>#include "8390.h"/* 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};int ultra_probe(struct device *dev);int ultra_probe1(struct device *dev, int ioaddr);static int ultra_open(struct device *dev);static void ultra_reset_8390(struct device *dev);static void ultra_get_8390_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,						int ring_page);static void ultra_block_input(struct device *dev, int count,						  struct sk_buff *skb, int ring_offset);static void ultra_block_output(struct device *dev, int count,							const unsigned char *buf, const int start_page);static void ultra_pio_get_hdr(struct device *dev, struct e8390_pkt_hdr *hdr,						int ring_page);static void ultra_pio_input(struct device *dev, int count,						  struct sk_buff *skb, int ring_offset);static void ultra_pio_output(struct device *dev, int count,							 const unsigned char *buf, const int start_page);static int ultra_close_card(struct device *dev);#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. *//*	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.*/#ifdef HAVE_DEVLISTstruct netdev_entry ultra_drv ={"ultra", ultra_probe1, NETCARD_IO_EXTENT, netcard_portlist};#else__initfunc(int ultra_probe(struct device *dev)){	int i;	int base_addr = dev ? dev->base_addr : 0;	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;	for (i = 0; ultra_portlist[i]; i++) {		int ioaddr = ultra_portlist[i];		if (check_region(ioaddr, ULTRA_IO_EXTENT))			continue;		if (ultra_probe1(dev, ioaddr) == 0)			return 0;	}	return ENODEV;}#endif__initfunc(int ultra_probe1(struct device *dev, int ioaddr)){	int i;	int checksum = 0;	const char *model_name;	unsigned char eeprom_irq = 0;	static unsigned version_printed = 0;	/* 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;	/* Check the ID nibble. */	if ((idreg & 0xF0) != 0x20 			/* SMC Ultra */		&& (idreg & 0xF0) != 0x40) 		/* SMC EtherEZ */		return ENODEV;	/* 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)		return ENODEV;	if (load_8390_module("smc-ultra.c"))		return -ENOSYS;	if (dev == NULL)		dev = init_etherdev(0, 0);	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");			return -EAGAIN;		}		dev->irq = irq;		eeprom_irq = 1;	}	/* Allocate dev->priv and fill in 8390 specific dev fields. */	if (ethdev_init(dev)) {		printk (", no memory for dev->priv.\n");                return -ENOMEM;        }	/* OK, we are certain this is going to work.  Setup the device. */	request_region(ioaddr, ULTRA_IO_EXTENT, model_name);	/* 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;	dev->rmem_start = dev->mem_start + TX_PAGES*256;	dev->mem_end = dev->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;		ei_status.block_output = &ultra_pio_output;		ei_status.get_8390_hdr = &ultra_pio_get_hdr;	} else {		printk(",%s IRQ %d memory %#lx-%#lx.\n", eeprom_irq ? "" : "assigned ",			   dev->irq, dev->mem_start, dev->mem_end-1);		ei_status.block_input = &ultra_block_input;		ei_status.block_output = &ultra_block_output;		ei_status.get_8390_hdr = &ultra_get_8390_hdr;	}	ei_status.reset_8390 = &ultra_reset_8390;	dev->open = &ultra_open;	dev->stop = &ultra_close_card;	NS8390_init(dev, 0);	return 0;}static intultra_open(struct device *dev)