[linux.git] / drivers / net / e2100.c

/* e2100.c: A Cabletron E2100 series ethernet driver for linux. */
/*
	Written 1993-1994 by Donald Becker.

	Copyright 1994 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.

	This is a driver for the Cabletron E2100 series ethercards.

	The Author may be reached as [email protected], or C/O
	Scyld Computing Corporation
	410 Severn Ave., Suite 210
	Annapolis MD 21403

	The E2100 series ethercard is a fairly generic shared memory 8390
	implementation.  The only unusual aspect is the way the shared memory
	registers are set: first you do an inb() in what is normally the
	station address region, and the low three bits of next outb() *address*
	is used	as the write value for that register.  Either someone wasn't
	too used to dem bit en bites, or they were trying to obfuscate the
	programming interface.

	There is an additional complication when setting the window on the packet
	buffer.  You must first do a read into the packet buffer region with the
	low 8 address bits the address setting the page for the start of the packet
	buffer window, and then do the above operation.  See mem_on() for details.

	One bug on the chip is that even a hard reset won't disable the memory
	window, usually resulting in a hung machine if mem_off() isn't called.
	If this happens, you must power down the machine for about 30 seconds.
*/

static const char version[] =
	"e2100.c:v1.01 7/21/94 Donald Becker ([email protected])\n";

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/delay.h>

#include <asm/io.h>
#include <asm/system.h>

#include "8390.h"

#define DRV_NAME "e2100"

static int e21_probe_list[] = {0x300, 0x280, 0x380, 0x220, 0};

/* Offsets from the base_addr.
   Read from the ASIC register, and the low three bits of the next outb()
   address is used to set the corresponding register. */
#define E21_NIC_OFFSET  0		/* Offset to the 8390 NIC. */
#define E21_ASIC		0x10
#define E21_MEM_ENABLE	0x10
#define  E21_MEM_ON		0x05	/* Enable memory in 16 bit mode. */
#define  E21_MEM_ON_8	0x07	/* Enable memory in  8 bit mode. */
#define E21_MEM_BASE	0x11
#define E21_IRQ_LOW		0x12	/* The low three bits of the IRQ number. */
#define E21_IRQ_HIGH	0x14	/* The high IRQ bit and media select ...  */
#define E21_MEDIA		0x14	/* (alias). */
#define  E21_ALT_IFPORT 0x02	/* Set to use the other (BNC,AUI) port. */
#define  E21_BIG_MEM	0x04	/* Use a bigger (64K) buffer (we don't) */
#define E21_SAPROM		0x10	/* Offset to station address data. */
#define E21_IO_EXTENT	 0x20

static inline void mem_on(short port, volatile char __iomem *mem_base,
						  unsigned char start_page )
{
	/* This is a little weird: set the shared memory window by doing a
	   read.  The low address bits specify the starting page. */
	readb(mem_base+start_page);
	inb(port + E21_MEM_ENABLE);
	outb(E21_MEM_ON, port + E21_MEM_ENABLE + E21_MEM_ON);
}

static inline void mem_off(short port)
{
	inb(port + E21_MEM_ENABLE);
	outb(0x00, port + E21_MEM_ENABLE);
}

/* In other drivers I put the TX pages first, but the E2100 window circuitry
   is designed to have a 4K Tx region last. The windowing circuitry wraps the
   window at 0x2fff->0x0000 so that the packets at e.g. 0x2f00 in the RX ring
   appear contiguously in the window. */
#define E21_RX_START_PG		0x00	/* First page of RX buffer */
#define E21_RX_STOP_PG		0x30	/* Last page +1 of RX ring */
#define E21_BIG_RX_STOP_PG	0xF0	/* Last page +1 of RX ring */
#define E21_TX_START_PG		E21_RX_STOP_PG	/* First page of TX buffer */

static int e21_probe1(struct net_device *dev, int ioaddr);

static int e21_open(struct net_device *dev);
static void e21_reset_8390(struct net_device *dev);
static void e21_block_input(struct net_device *dev, int count,
						   struct sk_buff *skb, int ring_offset);
static void e21_block_output(struct net_device *dev, int count,
							 const unsigned char *buf, int start_page);
static void e21_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
							int ring_page);
static int e21_open(struct net_device *dev);
static int e21_close(struct net_device *dev);


/*  Probe for the E2100 series ethercards.  These cards have an 8390 at the
	base address and the station address at both offset 0x10 and 0x18.  I read
	the station address from offset 0x18 to avoid the dataport of NE2000
	ethercards, and look for Ctron's unique ID (first three octets of the
	station address).
 */

static int  __init do_e2100_probe(struct net_device *dev)
{
	int *port;
	int base_addr = dev->base_addr;
	int irq = dev->irq;

	if (base_addr > 0x1ff)		/* Check a single specified location. */
		return e21_probe1(dev, base_addr);
	else if (base_addr != 0)	/* Don't probe at all. */
		return -ENXIO;

	for (port = e21_probe_list; *port; port++) {
		dev->irq = irq;
		if (e21_probe1(dev, *port) == 0)
			return 0;
	}

	return -ENODEV;
}

#ifndef MODULE
struct net_device * __init e2100_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_e2100_probe(dev);
	if (err)
		goto out;
	return dev;
out:
	free_netdev(dev);
	return ERR_PTR(err);
}
#endif

static const struct net_device_ops e21_netdev_ops = {
	.ndo_open		= e21_open,
	.ndo_stop		= e21_close,

	.ndo_start_xmit		= ei_start_xmit,
	.ndo_tx_timeout		= ei_tx_timeout,
	.ndo_get_stats		= ei_get_stats,
	.ndo_set_multicast_list = ei_set_multicast_list,
	.ndo_validate_addr	= eth_validate_addr,
	.ndo_change_mtu		= eth_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
	.ndo_poll_controller 	= ei_poll,
#endif
};

static int __init e21_probe1(struct net_device *dev, int ioaddr)
{
	int i, status, retval;
	unsigned char *station_addr = dev->dev_addr;
	static unsigned version_printed;

	if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
		return -EBUSY;

	/* First check the station address for the Ctron prefix. */
	if (inb(ioaddr + E21_SAPROM + 0) != 0x00
		|| inb(ioaddr + E21_SAPROM + 1) != 0x00
		|| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
		retval = -ENODEV;
		goto out;
	}

	/* Verify by making certain that there is a 8390 at there. */
	outb(E8390_NODMA + E8390_STOP, ioaddr);
	udelay(1);	/* we want to delay one I/O cycle - which is 2MHz */
	status = inb(ioaddr);
	if (status != 0x21 && status != 0x23) {
		retval = -ENODEV;
		goto out;
	}

	/* Read the station address PROM.  */
	for (i = 0; i < 6; i++)
		station_addr[i] = inb(ioaddr + E21_SAPROM + i);

	inb(ioaddr + E21_MEDIA); 		/* Point to media selection. */
	outb(0, ioaddr + E21_ASIC); 	/* and disable the secondary interface. */

	if (ei_debug  &&  version_printed++ == 0)
		printk(version);

	for (i = 0; i < 6; i++)
		printk(" %02X", station_addr[i]);

	if (dev->irq < 2) {
		int irqlist[] = {15,11,10,12,5,9,3,4}, i;
		for (i = 0; i < 8; i++)
			if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
				dev->irq = irqlist[i];
				break;
			}
		if (i >= 8) {
			printk(" unable to get IRQ %d.\n", dev->irq);
			retval = -EAGAIN;
			goto out;
		}
	} else if (dev->irq == 2)	/* Fixup luser bogosity: IRQ2 is really IRQ9 */
		dev->irq = 9;

	/* The 8390 is at the base address. */
	dev->base_addr = ioaddr;

	ei_status.name = "E2100";
	ei_status.word16 = 1;
	ei_status.tx_start_page = E21_TX_START_PG;
	ei_status.rx_start_page = E21_RX_START_PG;
	ei_status.stop_page = E21_RX_STOP_PG;
	ei_status.saved_irq = dev->irq;

	/* Check the media port used.  The port can be passed in on the
	   low mem_end bits. */
	if (dev->mem_end & 15)
		dev->if_port = dev->mem_end & 7;
	else {
		dev->if_port = 0;
		inb(ioaddr + E21_MEDIA); 	/* Turn automatic media detection on. */
		for(i = 0; i < 6; i++)
			if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
				dev->if_port = 1;
				break;
			}
	}

	/* Never map in the E21 shared memory unless you are actively using it.
	   Also, the shared memory has effective only one setting -- spread all
	   over the 128K region! */
	if (dev->mem_start == 0)
		dev->mem_start = 0xd0000;

	ei_status.mem = ioremap(dev->mem_start, 2*1024);
	if (!ei_status.mem) {
		printk("unable to remap memory\n");
		retval = -EAGAIN;
		goto out;
	}

#ifdef notdef
	/* These values are unused.  The E2100 has a 2K window into the packet
	   buffer.  The window can be set to start on any page boundary. */
	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
	dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
#endif

	printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
		   dev->if_port ? "secondary" : "primary", dev->mem_start);

	ei_status.reset_8390 = &e21_reset_8390;
	ei_status.block_input = &e21_block_input;
	ei_status.block_output = &e21_block_output;
	ei_status.get_8390_hdr = &e21_get_8390_hdr;

	dev->netdev_ops = &e21_netdev_ops;
	NS8390_init(dev, 0);

	retval = register_netdev(dev);
	if (retval)
		goto out;
	return 0;
out:
	release_region(ioaddr, E21_IO_EXTENT);
	return retval;
}

static int
e21_open(struct net_device *dev)
{
	short ioaddr = dev->base_addr;
	int retval;

	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
		return retval;

	/* Set the interrupt line and memory base on the hardware. */
	inb(ioaddr + E21_IRQ_LOW);
	outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
	inb(ioaddr + E21_IRQ_HIGH); 			/* High IRQ bit, and if_port. */
	outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
		   + (dev->if_port ? E21_ALT_IFPORT : 0));
	inb(ioaddr + E21_MEM_BASE);
	outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));

	ei_open(dev);
	return 0;
}

static void
e21_reset_8390(struct net_device *dev)
{
	short ioaddr = dev->base_addr;

	outb(0x01, ioaddr);
	if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
	ei_status.txing = 0;

	/* Set up the ASIC registers, just in case something changed them. */

	if (ei_debug > 1) printk("reset done\n");
	return;
}

/* Grab the 8390 specific header. We put the 2k window so the header page
   appears at the start of the shared memory. */

static void
e21_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{

	short ioaddr = dev->base_addr;
	char __iomem *shared_mem = ei_status.mem;

	mem_on(ioaddr, shared_mem, ring_page);

#ifdef notdef
	/* Officially this is what we are doing, but the readl() is faster */
	memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
#else
	((unsigned int*)hdr)[0] = readl(shared_mem);
#endif

	/* Turn off memory access: we would need to reprogram the window anyway. */
	mem_off(ioaddr);

}

/*  Block input and output are easy on shared memory ethercards.
	The E21xx makes block_input() especially easy by wrapping the top
	ring buffer to the bottom automatically. */
static void
e21_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	short ioaddr = dev->base_addr;
	char __iomem *shared_mem = ei_status.mem;

	mem_on(ioaddr, shared_mem, (ring_offset>>8));

	memcpy_fromio(skb->data, ei_status.mem + (ring_offset & 0xff), count);

	mem_off(ioaddr);
}

static void
e21_block_output(struct net_device *dev, int count, const unsigned char *buf,
				 int start_page)
{
	short ioaddr = dev->base_addr;
	volatile char __iomem *shared_mem = ei_status.mem;

	/* Set the shared memory window start by doing a read, with the low address
	   bits specifying the starting page. */
	readb(shared_mem + start_page);
	mem_on(ioaddr, shared_mem, start_page);

	memcpy_toio(shared_mem, buf, count);
	mem_off(ioaddr);
}

static int
e21_close(struct net_device *dev)
{
	short ioaddr = dev->base_addr;

	if (ei_debug > 1)
		printk("%s: Shutting down ethercard.\n", dev->name);

	free_irq(dev->irq, dev);
	dev->irq = ei_status.saved_irq;

	/* Shut off the interrupt line and secondary interface. */
	inb(ioaddr + E21_IRQ_LOW);
	outb(0, ioaddr + E21_ASIC);
	inb(ioaddr + E21_IRQ_HIGH); 			/* High IRQ bit, and if_port. */
	outb(0, ioaddr + E21_ASIC);

	ei_close(dev);

	/* Double-check that the memory has been turned off, because really
	   really bad things happen if it isn't. */
	mem_off(ioaddr);

	return 0;
}


#ifdef MODULE
#define MAX_E21_CARDS	4	/* Max number of E21 cards per module */
static struct net_device *dev_e21[MAX_E21_CARDS];
static int io[MAX_E21_CARDS];
static int irq[MAX_E21_CARDS];
static int mem[MAX_E21_CARDS];
static int xcvr[MAX_E21_CARDS];		/* choose int. or ext. xcvr */

module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param_array(mem, int, NULL, 0);
module_param_array(xcvr, int, NULL, 0);
MODULE_PARM_DESC(io, "I/O base address(es)");
MODULE_PARM_DESC(irq, "IRQ number(s)");
MODULE_PARM_DESC(mem, " memory base address(es)");
MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
MODULE_DESCRIPTION("Cabletron E2100 ISA ethernet driver");
MODULE_LICENSE("GPL");

/* This is set up so that only a single autoprobe takes place per call.
ISA device autoprobes on a running machine are not recommended. */

int __init init_module(void)
{
	struct net_device *dev;
	int this_dev, found = 0;

	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
		if (io[this_dev] == 0)  {
			if (this_dev != 0) break; /* only autoprobe 1st one */
			printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n");
		}
		dev = alloc_ei_netdev();
		if (!dev)
			break;
		dev->irq = irq[this_dev];
		dev->base_addr = io[this_dev];
		dev->mem_start = mem[this_dev];
		dev->mem_end = xcvr[this_dev];	/* low 4bits = xcvr sel. */
		if (do_e2100_probe(dev) == 0) {
			dev_e21[found++] = dev;
			continue;
		}
		free_netdev(dev);
		printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
		break;
	}
	if (found)
		return 0;
	return -ENXIO;
}

static void cleanup_card(struct net_device *dev)
{
	/* NB: e21_close() handles free_irq */
	iounmap(ei_status.mem);
	release_region(dev->base_addr, E21_IO_EXTENT);
}

void __exit
cleanup_module(void)
{
	int this_dev;

	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
		struct net_device *dev = dev_e21[this_dev];
		if (dev) {
			unregister_netdev(dev);
			cleanup_card(dev);
			free_netdev(dev);
		}
	}
}
#endif /* MODULE */
Commit	Line	Data
1da177e4 LT	1	/* e2100.c: A Cabletron E2100 series ethernet driver for linux. */
	2	/*
	3	Written 1993-1994 by Donald Becker.
	4
	5	Copyright 1994 by Donald Becker.
	6	Copyright 1993 United States Government as represented by the
	7	Director, National Security Agency. This software may be used and
	8	distributed according to the terms of the GNU General Public License,
	9	incorporated herein by reference.
	10
	11	This is a driver for the Cabletron E2100 series ethercards.
	12
	13	The Author may be reached as [email protected], or C/O
	14	Scyld Computing Corporation
	15	410 Severn Ave., Suite 210
	16	Annapolis MD 21403
	17
	18	The E2100 series ethercard is a fairly generic shared memory 8390
	19	implementation. The only unusual aspect is the way the shared memory
	20	registers are set: first you do an inb() in what is normally the
	21	station address region, and the low three bits of next outb() address
	22	is used as the write value for that register. Either someone wasn't
	23	too used to dem bit en bites, or they were trying to obfuscate the
	24	programming interface.
	25
	26	There is an additional complication when setting the window on the packet
	27	buffer. You must first do a read into the packet buffer region with the
	28	low 8 address bits the address setting the page for the start of the packet
	29	buffer window, and then do the above operation. See mem_on() for details.
	30
	31	One bug on the chip is that even a hard reset won't disable the memory
	32	window, usually resulting in a hung machine if mem_off() isn't called.
	33	If this happens, you must power down the machine for about 30 seconds.
	34	*/
	35
	36	static const char version[] =
	37	"e2100.c:v1.01 7/21/94 Donald Becker ([email protected])\n";
	38
	39	#include <linux/module.h>
	40	#include <linux/kernel.h>
	41	#include <linux/errno.h>
	42	#include <linux/string.h>
	43	#include <linux/ioport.h>
	44	#include <linux/netdevice.h>
	45	#include <linux/etherdevice.h>
	46	#include <linux/init.h>
	47	#include <linux/delay.h>
	48
	49	#include <asm/io.h>
	50	#include <asm/system.h>
	51
	52	#include "8390.h"
	53
	54	#define DRV_NAME "e2100"
	55
	56	static int e21_probe_list[] = {0x300, 0x280, 0x380, 0x220, 0};
	57
	58	/* Offsets from the base_addr.
	59	Read from the ASIC register, and the low three bits of the next outb()
	60	address is used to set the corresponding register. */
	61	#define E21_NIC_OFFSET 0 /* Offset to the 8390 NIC. */
	62	#define E21_ASIC 0x10
	63	#define E21_MEM_ENABLE 0x10
	64	#define E21_MEM_ON 0x05 /* Enable memory in 16 bit mode. */
65	#define E21_MEM_ON_8 0x07 /* Enable memory in 8 bit mode. */
66	#define E21_MEM_BASE 0x11
67	#define E21_IRQ_LOW 0x12 /* The low three bits of the IRQ number. */
68	#define E21_IRQ_HIGH 0x14 /* The high IRQ bit and media select ... */
69	#define E21_MEDIA 0x14 /* (alias). */
70	#define E21_ALT_IFPORT 0x02 /* Set to use the other (BNC,AUI) port. */
71	#define E21_BIG_MEM 0x04 /* Use a bigger (64K) buffer (we don't) */
72	#define E21_SAPROM 0x10 /* Offset to station address data. */
73	#define E21_IO_EXTENT 0x20
74
75	static inline void mem_on(short port, volatile char __iomem *mem_base,
76	unsigned char start_page )
77	{
78	/* This is a little weird: set the shared memory window by doing a
79	read. The low address bits specify the starting page. */
80	readb(mem_base+start_page);
81	inb(port + E21_MEM_ENABLE);
82	outb(E21_MEM_ON, port + E21_MEM_ENABLE + E21_MEM_ON);
83	}
84
85	static inline void mem_off(short port)
86	{
87	inb(port + E21_MEM_ENABLE);
88	outb(0x00, port + E21_MEM_ENABLE);
89	}
90
91	/* In other drivers I put the TX pages first, but the E2100 window circuitry
92	is designed to have a 4K Tx region last. The windowing circuitry wraps the
93	window at 0x2fff->0x0000 so that the packets at e.g. 0x2f00 in the RX ring
94	appear contiguously in the window. */
95	#define E21_RX_START_PG 0x00 /* First page of RX buffer */
96	#define E21_RX_STOP_PG 0x30 /* Last page +1 of RX ring */
97	#define E21_BIG_RX_STOP_PG 0xF0 /* Last page +1 of RX ring */
98	#define E21_TX_START_PG E21_RX_STOP_PG /* First page of TX buffer */
99
100	static int e21_probe1(struct net_device *dev, int ioaddr);
101
102	static int e21_open(struct net_device *dev);
103	static void e21_reset_8390(struct net_device *dev);
104	static void e21_block_input(struct net_device *dev, int count,
105	struct sk_buff *skb, int ring_offset);
106	static void e21_block_output(struct net_device *dev, int count,
107	const unsigned char *buf, int start_page);
108	static void e21_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr,
109	int ring_page);
8284abea	110	static int e21_open(struct net_device *dev);
1da177e4 LT	111	static int e21_close(struct net_device *dev);
1da177e4 LT	112
6aa20a22	113
1da177e4 LT	114	/* Probe for the E2100 series ethercards. These cards have an 8390 at the
	115	base address and the station address at both offset 0x10 and 0x18. I read
	116	the station address from offset 0x18 to avoid the dataport of NE2000
	117	ethercards, and look for Ctron's unique ID (first three octets of the
	118	station address).
	119	*/
	120
	121	static int __init do_e2100_probe(struct net_device *dev)
	122	{
	123	int *port;
	124	int base_addr = dev->base_addr;
	125	int irq = dev->irq;
	126
1da177e4 LT	127	if (base_addr > 0x1ff) /* Check a single specified location. */
	128	return e21_probe1(dev, base_addr);
	129	else if (base_addr != 0) /* Don't probe at all. */
	130	return -ENXIO;
	131
	132	for (port = e21_probe_list; *port; port++) {
	133	dev->irq = irq;
	134	if (e21_probe1(dev, *port) == 0)
	135	return 0;
	136	}
	137
	138	return -ENODEV;
	139	}
	140
1da177e4 LT	141	#ifndef MODULE
	142	struct net_device * __init e2100_probe(int unit)
	143	{
	144	struct net_device *dev = alloc_ei_netdev();
	145	int err;
	146
	147	if (!dev)
	148	return ERR_PTR(-ENOMEM);
	149
	150	sprintf(dev->name, "eth%d", unit);
	151	netdev_boot_setup_check(dev);
	152
	153	err = do_e2100_probe(dev);
	154	if (err)
	155	goto out;
1da177e4	156	return dev;
1da177e4 LT	157	out:
	158	free_netdev(dev);
	159	return ERR_PTR(err);
	160	}
	161	#endif
	162
8284abea SH	163	static const struct net_device_ops e21_netdev_ops = {
	164	.ndo_open = e21_open,
	165	.ndo_stop = e21_close,
	166
	167	.ndo_start_xmit = ei_start_xmit,
	168	.ndo_tx_timeout = ei_tx_timeout,
	169	.ndo_get_stats = ei_get_stats,
	170	.ndo_set_multicast_list = ei_set_multicast_list,
	171	.ndo_validate_addr = eth_validate_addr,
	172	.ndo_change_mtu = eth_change_mtu,
	173	#ifdef CONFIG_NET_POLL_CONTROLLER
	174	.ndo_poll_controller = ei_poll,
	175	#endif
	176	};
	177
1da177e4 LT	178	static int __init e21_probe1(struct net_device *dev, int ioaddr)
	179	{
	180	int i, status, retval;
	181	unsigned char *station_addr = dev->dev_addr;
	182	static unsigned version_printed;
	183
	184	if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
	185	return -EBUSY;
	186
	187	/* First check the station address for the Ctron prefix. */
	188	if (inb(ioaddr + E21_SAPROM + 0) != 0x00
	189	\|\| inb(ioaddr + E21_SAPROM + 1) != 0x00
	190	\|\| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
	191	retval = -ENODEV;
	192	goto out;
	193	}
	194
	195	/* Verify by making certain that there is a 8390 at there. */
	196	outb(E8390_NODMA + E8390_STOP, ioaddr);
	197	udelay(1); /* we want to delay one I/O cycle - which is 2MHz */
	198	status = inb(ioaddr);
	199	if (status != 0x21 && status != 0x23) {
	200	retval = -ENODEV;
	201	goto out;
	202	}
	203
	204	/* Read the station address PROM. */
	205	for (i = 0; i < 6; i++)
	206	station_addr[i] = inb(ioaddr + E21_SAPROM + i);
	207
	208	inb(ioaddr + E21_MEDIA); /* Point to media selection. */
	209	outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */
	210
	211	if (ei_debug && version_printed++ == 0)
	212	printk(version);
	213
	214	for (i = 0; i < 6; i++)
	215	printk(" %02X", station_addr[i]);
	216
	217	if (dev->irq < 2) {
	218	int irqlist[] = {15,11,10,12,5,9,3,4}, i;
	219	for (i = 0; i < 8; i++)
	220	if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
	221	dev->irq = irqlist[i];
	222	break;
	223	}
	224	if (i >= 8) {
	225	printk(" unable to get IRQ %d.\n", dev->irq);
	226	retval = -EAGAIN;
	227	goto out;
	228	}
	229	} else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */
	230	dev->irq = 9;
	231
	232	/* The 8390 is at the base address. */
	233	dev->base_addr = ioaddr;
	234
	235	ei_status.name = "E2100";
	236	ei_status.word16 = 1;
	237	ei_status.tx_start_page = E21_TX_START_PG;
	238	ei_status.rx_start_page = E21_RX_START_PG;
	239	ei_status.stop_page = E21_RX_STOP_PG;
	240	ei_status.saved_irq = dev->irq;
	241
242	/* Check the media port used. The port can be passed in on the
243	low mem_end bits. */
244	if (dev->mem_end & 15)
245	dev->if_port = dev->mem_end & 7;
246	else {
247	dev->if_port = 0;
248	inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */
249	for(i = 0; i < 6; i++)
250	if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
251	dev->if_port = 1;
252	break;
253	}
254	}
255
256	/* Never map in the E21 shared memory unless you are actively using it.
257	Also, the shared memory has effective only one setting -- spread all
258	over the 128K region! */
259	if (dev->mem_start == 0)
260	dev->mem_start = 0xd0000;
261
262	ei_status.mem = ioremap(dev->mem_start, 2*1024);
263	if (!ei_status.mem) {
264	printk("unable to remap memory\n");
265	retval = -EAGAIN;
266	goto out;
267	}
268
269	#ifdef notdef
270	/* These values are unused. The E2100 has a 2K window into the packet
271	buffer. The window can be set to start on any page boundary. */
272	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
273	dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
274	#endif
275
276	printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
277	dev->if_port ? "secondary" : "primary", dev->mem_start);
278
279	ei_status.reset_8390 = &e21_reset_8390;
280	ei_status.block_input = &e21_block_input;
281	ei_status.block_output = &e21_block_output;
282	ei_status.get_8390_hdr = &e21_get_8390_hdr;
8284abea SH	283
8284abea SH	284	dev->netdev_ops = &e21_netdev_ops;
1da177e4 LT	285	NS8390_init(dev, 0);
1da177e4 LT	286
b1fc5505 HX	287	retval = register_netdev(dev);
	288	if (retval)
	289	goto out;
1da177e4 LT	290	return 0;
	291	out:
	292	release_region(ioaddr, E21_IO_EXTENT);
	293	return retval;
	294	}
	295
	296	static int
	297	e21_open(struct net_device *dev)
	298	{
	299	short ioaddr = dev->base_addr;
	300	int retval;
	301
	302	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
	303	return retval;
	304
	305	/* Set the interrupt line and memory base on the hardware. */
	306	inb(ioaddr + E21_IRQ_LOW);
	307	outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
	308	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
	309	outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
	310	+ (dev->if_port ? E21_ALT_IFPORT : 0));
	311	inb(ioaddr + E21_MEM_BASE);
	312	outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));
	313
	314	ei_open(dev);
	315	return 0;
	316	}
	317
	318	static void
	319	e21_reset_8390(struct net_device *dev)
	320	{
	321	short ioaddr = dev->base_addr;
	322
	323	outb(0x01, ioaddr);
	324	if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
	325	ei_status.txing = 0;
	326
	327	/* Set up the ASIC registers, just in case something changed them. */
	328
	329	if (ei_debug > 1) printk("reset done\n");
	330	return;
	331	}
	332
	333	/* Grab the 8390 specific header. We put the 2k window so the header page
	334	appears at the start of the shared memory. */
	335
	336	static void
	337	e21_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr, int ring_page)
	338	{
	339
	340	short ioaddr = dev->base_addr;
	341	char __iomem *shared_mem = ei_status.mem;
	342
	343	mem_on(ioaddr, shared_mem, ring_page);
	344
	345	#ifdef notdef
	346	/* Officially this is what we are doing, but the readl() is faster */
	347	memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
	348	#else
	349	((unsigned int*)hdr)[0] = readl(shared_mem);
	350	#endif
	351
	352	/* Turn off memory access: we would need to reprogram the window anyway. */
	353	mem_off(ioaddr);
354
355	}
356
357	/* Block input and output are easy on shared memory ethercards.
358	The E21xx makes block_input() especially easy by wrapping the top
359	ring buffer to the bottom automatically. */
360	static void
361	e21_block_input(struct net_device dev, int count, struct sk_buff skb, int ring_offset)
362	{
363	short ioaddr = dev->base_addr;
364	char __iomem *shared_mem = ei_status.mem;
365
366	mem_on(ioaddr, shared_mem, (ring_offset>>8));
367
4ec03116	368	memcpy_fromio(skb->data, ei_status.mem + (ring_offset & 0xff), count);
1da177e4 LT	369
	370	mem_off(ioaddr);
	371	}
	372
	373	static void
	374	e21_block_output(struct net_device dev, int count, const unsigned char buf,
	375	int start_page)
	376	{
	377	short ioaddr = dev->base_addr;
	378	volatile char __iomem *shared_mem = ei_status.mem;
	379
	380	/* Set the shared memory window start by doing a read, with the low address
	381	bits specifying the starting page. */
	382	readb(shared_mem + start_page);
	383	mem_on(ioaddr, shared_mem, start_page);
	384
	385	memcpy_toio(shared_mem, buf, count);
	386	mem_off(ioaddr);
	387	}
	388
	389	static int
	390	e21_close(struct net_device *dev)
	391	{
	392	short ioaddr = dev->base_addr;
	393
	394	if (ei_debug > 1)
	395	printk("%s: Shutting down ethercard.\n", dev->name);
	396
	397	free_irq(dev->irq, dev);
	398	dev->irq = ei_status.saved_irq;
	399
	400	/* Shut off the interrupt line and secondary interface. */
	401	inb(ioaddr + E21_IRQ_LOW);
	402	outb(0, ioaddr + E21_ASIC);
	403	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
	404	outb(0, ioaddr + E21_ASIC);
	405
	406	ei_close(dev);
	407
	408	/* Double-check that the memory has been turned off, because really
	409	really bad things happen if it isn't. */
	410	mem_off(ioaddr);
	411
	412	return 0;
	413	}
	414
6aa20a22	415
1da177e4 LT	416	#ifdef MODULE
	417	#define MAX_E21_CARDS 4 /* Max number of E21 cards per module */
	418	static struct net_device *dev_e21[MAX_E21_CARDS];
	419	static int io[MAX_E21_CARDS];
	420	static int irq[MAX_E21_CARDS];
	421	static int mem[MAX_E21_CARDS];
	422	static int xcvr[MAX_E21_CARDS]; /* choose int. or ext. xcvr */
	423
	424	module_param_array(io, int, NULL, 0);
	425	module_param_array(irq, int, NULL, 0);
	426	module_param_array(mem, int, NULL, 0);
	427	module_param_array(xcvr, int, NULL, 0);
	428	MODULE_PARM_DESC(io, "I/O base address(es)");
	429	MODULE_PARM_DESC(irq, "IRQ number(s)");
	430	MODULE_PARM_DESC(mem, " memory base address(es)");
	431	MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
	432	MODULE_DESCRIPTION("Cabletron E2100 ISA ethernet driver");
	433	MODULE_LICENSE("GPL");
	434
	435	/* This is set up so that only a single autoprobe takes place per call.
	436	ISA device autoprobes on a running machine are not recommended. */
d543cbb6 AM	437
d543cbb6 AM	438	int __init init_module(void)
1da177e4 LT	439	{
	440	struct net_device *dev;
	441	int this_dev, found = 0;
	442
	443	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
	444	if (io[this_dev] == 0) {
	445	if (this_dev != 0) break; /* only autoprobe 1st one */
	446	printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n");
	447	}
	448	dev = alloc_ei_netdev();
	449	if (!dev)
	450	break;
	451	dev->irq = irq[this_dev];
	452	dev->base_addr = io[this_dev];
	453	dev->mem_start = mem[this_dev];
	454	dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
	455	if (do_e2100_probe(dev) == 0) {
b1fc5505 HX	456	dev_e21[found++] = dev;
b1fc5505 HX	457	continue;
1da177e4 LT	458	}
	459	free_netdev(dev);
	460	printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
	461	break;
	462	}
	463	if (found)
	464	return 0;
	465	return -ENXIO;
	466	}
	467
64916f1e DV	468	static void cleanup_card(struct net_device *dev)
	469	{
	470	/* NB: e21_close() handles free_irq */
	471	iounmap(ei_status.mem);
	472	release_region(dev->base_addr, E21_IO_EXTENT);
	473	}
	474
afc8eb46	475	void __exit
1da177e4 LT	476	cleanup_module(void)
	477	{
	478	int this_dev;
	479
	480	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
	481	struct net_device *dev = dev_e21[this_dev];
	482	if (dev) {
	483	unregister_netdev(dev);
	484	cleanup_card(dev);
	485	free_netdev(dev);
	486	}
	487	}
	488	}
	489	#endif /* MODULE */