/* 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 net_device *dev);static int ultra_probe1(struct net_device *dev, int ioaddr);static 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);#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.*/int __init ultra_probe(struct net_device *dev){	int i;	int base_addr = dev->base_addr;	SET_MODULE_OWNER(dev);	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++)		if (ultra_probe1(dev, ultra_portlist[i]) == 0)			return 0;	return -ENODEV;}static 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, dev->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;	}	/* Allocate dev->priv and fill in 8390 specific dev fields. */	if (ethdev_init(dev)) {		printk (", no memory for dev->priv.\n");                retval = -ENOMEM;		goto out;        }	/* 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;out:	release_region(ioaddr, ULTRA_IO_EXTENT);	return retval;}static intultra_open(struct net_device *dev){	int retval;	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */	unsigned char irq2reg[] = {0, 0, 0x04, 0x08, 0, 0x0C, 0, 0x40,				   0, 0x04, 0x44, 0x48, 0, 0, 0, 0x4C, };	retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);	if (retval)		return retval;	outb(0x00, ioaddr);	/* Disable shared memory for safety. */	outb(0x80, ioaddr + 5);	/* Set the IRQ line. */	outb(inb(ioaddr + 4) | 0x80, ioaddr + 4);	outb((inb(ioaddr + 13) & ~0x4C) | irq2reg[dev->irq], ioaddr + 13);	outb(inb(ioaddr + 4) & 0x7f, ioaddr + 4);	if (ei_status.block_input == &ultra_pio_input) {		outb(0x11, ioaddr + 6);		/* Enable interrupts and PIO. */		outb(0x01, ioaddr + 0x19);  	/* Enable ring read auto-wrap. */	} else		outb(0x01, ioaddr + 6);		/* Enable interrupts and memory. */	/* Set the early receive warning level in window 0 high enough not	   to receive ERW interrupts. */	outb_p(E8390_NODMA+E8390_PAGE0, dev->base_addr);	outb(0xff, dev->base_addr + EN0_ERWCNT);	ei_open(dev);	return 0;}static voidultra_reset_8390(struct net_device *dev){	int cmd_port = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC base addr */	outb(ULTRA_RESET, cmd_port);	if (ei_debug > 1) printk("resetting Ultra, t=%ld...", jiffies);	ei_status.txing = 0;	outb(0x00, cmd_port);	/* Disable shared memory for safety. */	outb(0x80, cmd_port + 5);	if (ei_status.block_input == &ultra_pio_input)		outb(0x11, cmd_port + 6);		/* Enable interrupts and PIO. */	else		outb(0x01, cmd_port + 6);		/* Enable interrupts and memory. */	if (ei_debug > 1) printk("reset done\n");	return;}/* Grab the 8390 specific header. Similar to the block_input routine, but   we don't need to be concerned with ring wrap as the header will be at   the start of a page, so we optimize accordingly. */static voidultra_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page){	unsigned long hdr_start = dev->mem_start + ((ring_page - START_PG)<<8);	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	/* shmem on */#ifdef notdef	/* Officially this is what we are doing, but the readl() is faster */	isa_memcpy_fromio(hdr, hdr_start, sizeof(struct e8390_pkt_hdr));#else	((unsigned int*)hdr)[0] = isa_readl(hdr_start);#endif	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* shmem off */}/* Block input and output are easy on shared memory ethercards, the only   complication is when the ring buffer wraps. */static voidultra_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset){	unsigned long xfer_start = dev->mem_start + ring_offset - (START_PG<<8);	/* Enable shared memory. */	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	if (xfer_start + count > dev->rmem_end) {		/* We must wrap the input move. */		int semi_count = dev->rmem_end - xfer_start;		isa_memcpy_fromio(skb->data, xfer_start, semi_count);		count -= semi_count;		isa_memcpy_fromio(skb->data + semi_count, dev->rmem_start, count);	} else {		/* Packet is in one chunk -- we can copy + cksum. */		isa_eth_io_copy_and_sum(skb, xfer_start, count, 0);	}	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET);	/* Disable memory. */}static voidultra_block_output(struct net_device *dev, int count, const unsigned char *buf,				int start_page){	unsigned long shmem = dev->mem_start + ((start_page - START_PG)<<8);	/* Enable shared memory. */	outb(ULTRA_MEMENB, dev->base_addr - ULTRA_NIC_OFFSET);	isa_memcpy_toio(shmem, buf, count);	outb(0x00, dev->base_addr - ULTRA_NIC_OFFSET); /* Disable memory. */}/* The identical operations for programmed I/O cards.   The PIO model is trivial to use: the 16 bit start address is written   byte-sequentially to IOPA, with no intervening I/O operations, and the   data is read or written to the IOPD data port.   The only potential complication is that the address register is shared   and must be always be rewritten between each read/write direction change.   This is no problem for us, as the 8390 code ensures that we are single   threaded. */static void ultra_pio_get_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,						int ring_page){	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */	outb(ring_page, ioaddr + IOPA);	insw(ioaddr + IOPD, hdr, sizeof(struct e8390_pkt_hdr)>>1);}static void ultra_pio_input(struct net_device *dev, int count,						  struct sk_buff *skb, int ring_offset){	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */    char *buf = skb->data;	/* For now set the address again, although it should already be correct. */	outb(ring_offset, ioaddr + IOPA);	/* Set the address, LSB first. */	outb(ring_offset >> 8, ioaddr + IOPA);	/* We know skbuffs are padded to at least word alignment. */	insw(ioaddr + IOPD, buf, (count+1)>>1);}static void ultra_pio_output(struct net_device *dev, int count,							const unsigned char *buf, const int start_page){	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* ASIC addr */	outb(0x00, ioaddr + IOPA);	/* Set the address, LSB first. */	outb(start_page, ioaddr + IOPA);	/* An extra odd byte is OK here as well. */	outsw(ioaddr + IOPD, buf, (count+1)>>1);}static intultra_close_card(struct net_device *dev){	int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET; /* CMDREG */	netif_stop_queue(dev);	if (ei_debug > 1)		printk("%s: Shutting down ethercard.\n", dev->name);	outb(0x00, ioaddr + 6);		/* Disable interrupts. */	free_irq(dev->irq, dev);	NS8390_init(dev, 0);	/* We should someday disable shared memory and change to 8-bit mode	   "just in case"... */	return 0;}#ifdef MODULE#define MAX_ULTRA_CARDS	4	/* Max number of Ultra cards per module */static struct net_device dev_ultra[MAX_ULTRA_CARDS];static int io[MAX_ULTRA_CARDS];static int irq[MAX_ULTRA_CARDS];MODULE_PARM(io, "1-" __MODULE_STRING(MAX_ULTRA_CARDS) "i");MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_ULTRA_CARDS) "i");EXPORT_NO_SYMBOLS;/* This is set up so that only a single autoprobe takes place per call.ISA device autoprobes on a running machine are not recommended. */intinit_module(void){	int this_dev, found = 0;	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {		struct net_device *dev = &dev_ultra[this_dev];		dev->irq = irq[this_dev];		dev->base_addr = io[this_dev];		dev->init = ultra_probe;		if (io[this_dev] == 0)  {			if (this_dev != 0) break; /* only autoprobe 1st one */			printk(KERN_NOTICE "smc-ultra.c: Presently autoprobing (not recommended) for a single card.\n");		}		if (register_netdev(dev) != 0) {			printk(KERN_WARNING "smc-ultra.c: No SMC Ultra card found (i/o = 0x%x).\n", io[this_dev]);			if (found != 0) return 0;	/* Got at least one. */			return -ENXIO;		}		found++;	}	return 0;}voidcleanup_module(void){	int this_dev;	for (this_dev = 0; this_dev < MAX_ULTRA_CARDS; this_dev++) {		struct net_device *dev = &dev_ultra[this_dev];		if (dev->priv != NULL) {			/* NB: ultra_close_card() does free_irq */			int ioaddr = dev->base_addr - ULTRA_NIC_OFFSET;			unregister_netdev(dev);			release_region(ioaddr, ULTRA_IO_EXTENT);			kfree(dev->priv);		}	}}#endif /* MODULE *//* * Local variables: *  compile-command: "gcc -D__KERNEL__ -Wall -O6 -I/usr/src/linux/net/inet -c smc-ultra.c" *  version-control: t *  kept-new-versions: 5 *  c-indent-level: 4 *  c-basic-offset: 4 *  tab-width: 4 * End: */