[linux-2.6-block.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 becker@scyld.com, 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 (becker@cesdis.gsfc.nasa.gov)\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_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 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->open = &e21_open;
	dev->stop = &e21_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
	dev->poll_controller = ei_poll;
#endif
	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 becker@scyld.com, 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 (becker@cesdis.gsfc.nasa.gov)\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);
110
111	static int e21_close(struct net_device *dev);
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
	163	static int __init e21_probe1(struct net_device *dev, int ioaddr)
	164	{
	165	int i, status, retval;
	166	unsigned char *station_addr = dev->dev_addr;
	167	static unsigned version_printed;
	168
	169	if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
	170	return -EBUSY;
	171
	172	/* First check the station address for the Ctron prefix. */
	173	if (inb(ioaddr + E21_SAPROM + 0) != 0x00
	174	\|\| inb(ioaddr + E21_SAPROM + 1) != 0x00
	175	\|\| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
	176	retval = -ENODEV;
	177	goto out;
	178	}
	179
	180	/* Verify by making certain that there is a 8390 at there. */
	181	outb(E8390_NODMA + E8390_STOP, ioaddr);
	182	udelay(1); /* we want to delay one I/O cycle - which is 2MHz */
	183	status = inb(ioaddr);
	184	if (status != 0x21 && status != 0x23) {
	185	retval = -ENODEV;
	186	goto out;
	187	}
	188
	189	/* Read the station address PROM. */
	190	for (i = 0; i < 6; i++)
	191	station_addr[i] = inb(ioaddr + E21_SAPROM + i);
	192
	193	inb(ioaddr + E21_MEDIA); /* Point to media selection. */
	194	outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */
	195
	196	if (ei_debug && version_printed++ == 0)
	197	printk(version);
	198
	199	for (i = 0; i < 6; i++)
	200	printk(" %02X", station_addr[i]);
	201
	202	if (dev->irq < 2) {
	203	int irqlist[] = {15,11,10,12,5,9,3,4}, i;
	204	for (i = 0; i < 8; i++)
	205	if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
	206	dev->irq = irqlist[i];
	207	break;
	208	}
	209	if (i >= 8) {
	210	printk(" unable to get IRQ %d.\n", dev->irq);
	211	retval = -EAGAIN;
	212	goto out;
	213	}
	214	} else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */
	215	dev->irq = 9;
	216
	217	/* The 8390 is at the base address. */
	218	dev->base_addr = ioaddr;
	219
	220	ei_status.name = "E2100";
221	ei_status.word16 = 1;
222	ei_status.tx_start_page = E21_TX_START_PG;
223	ei_status.rx_start_page = E21_RX_START_PG;
224	ei_status.stop_page = E21_RX_STOP_PG;
225	ei_status.saved_irq = dev->irq;
226
227	/* Check the media port used. The port can be passed in on the
228	low mem_end bits. */
229	if (dev->mem_end & 15)
230	dev->if_port = dev->mem_end & 7;
231	else {
232	dev->if_port = 0;
233	inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */
234	for(i = 0; i < 6; i++)
235	if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
236	dev->if_port = 1;
237	break;
238	}
239	}
240
241	/* Never map in the E21 shared memory unless you are actively using it.
242	Also, the shared memory has effective only one setting -- spread all
243	over the 128K region! */
244	if (dev->mem_start == 0)
245	dev->mem_start = 0xd0000;
246
247	ei_status.mem = ioremap(dev->mem_start, 2*1024);
248	if (!ei_status.mem) {
249	printk("unable to remap memory\n");
250	retval = -EAGAIN;
251	goto out;
252	}
253
254	#ifdef notdef
255	/* These values are unused. The E2100 has a 2K window into the packet
256	buffer. The window can be set to start on any page boundary. */
257	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
258	dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
259	#endif
260
261	printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
262	dev->if_port ? "secondary" : "primary", dev->mem_start);
263
264	ei_status.reset_8390 = &e21_reset_8390;
265	ei_status.block_input = &e21_block_input;
266	ei_status.block_output = &e21_block_output;
267	ei_status.get_8390_hdr = &e21_get_8390_hdr;
268	dev->open = &e21_open;
269	dev->stop = &e21_close;
270	#ifdef CONFIG_NET_POLL_CONTROLLER
271	dev->poll_controller = ei_poll;
272	#endif
273	NS8390_init(dev, 0);
274
b1fc5505	275	retval = register_netdev(dev);
	276	if (retval)
	277	goto out;
1da177e4 LT	278	return 0;
	279	out:
	280	release_region(ioaddr, E21_IO_EXTENT);
	281	return retval;
	282	}
	283
	284	static int
	285	e21_open(struct net_device *dev)
	286	{
	287	short ioaddr = dev->base_addr;
	288	int retval;
	289
	290	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
	291	return retval;
	292
	293	/* Set the interrupt line and memory base on the hardware. */
	294	inb(ioaddr + E21_IRQ_LOW);
	295	outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
	296	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
	297	outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
	298	+ (dev->if_port ? E21_ALT_IFPORT : 0));
	299	inb(ioaddr + E21_MEM_BASE);
	300	outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));
	301
	302	ei_open(dev);
	303	return 0;
	304	}
	305
	306	static void
	307	e21_reset_8390(struct net_device *dev)
	308	{
	309	short ioaddr = dev->base_addr;
	310
	311	outb(0x01, ioaddr);
	312	if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
	313	ei_status.txing = 0;
	314
	315	/* Set up the ASIC registers, just in case something changed them. */
	316
	317	if (ei_debug > 1) printk("reset done\n");
	318	return;
	319	}
	320
	321	/* Grab the 8390 specific header. We put the 2k window so the header page
	322	appears at the start of the shared memory. */
	323
	324	static void
	325	e21_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr, int ring_page)
	326	{
	327
	328	short ioaddr = dev->base_addr;
	329	char __iomem *shared_mem = ei_status.mem;
	330
	331	mem_on(ioaddr, shared_mem, ring_page);
	332
	333	#ifdef notdef
	334	/* Officially this is what we are doing, but the readl() is faster */
	335	memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
	336	#else
	337	((unsigned int*)hdr)[0] = readl(shared_mem);
	338	#endif
	339
	340	/* Turn off memory access: we would need to reprogram the window anyway. */
	341	mem_off(ioaddr);
342
343	}
344
345	/* Block input and output are easy on shared memory ethercards.
346	The E21xx makes block_input() especially easy by wrapping the top
347	ring buffer to the bottom automatically. */
348	static void
349	e21_block_input(struct net_device dev, int count, struct sk_buff skb, int ring_offset)
350	{
351	short ioaddr = dev->base_addr;
352	char __iomem *shared_mem = ei_status.mem;
353
354	mem_on(ioaddr, shared_mem, (ring_offset>>8));
355
4ec03116	356	memcpy_fromio(skb->data, ei_status.mem + (ring_offset & 0xff), count);
1da177e4 LT	357
	358	mem_off(ioaddr);
	359	}
	360
	361	static void
	362	e21_block_output(struct net_device dev, int count, const unsigned char buf,
	363	int start_page)
	364	{
	365	short ioaddr = dev->base_addr;
	366	volatile char __iomem *shared_mem = ei_status.mem;
	367
	368	/* Set the shared memory window start by doing a read, with the low address
	369	bits specifying the starting page. */
	370	readb(shared_mem + start_page);
	371	mem_on(ioaddr, shared_mem, start_page);
	372
	373	memcpy_toio(shared_mem, buf, count);
	374	mem_off(ioaddr);
	375	}
	376
	377	static int
	378	e21_close(struct net_device *dev)
	379	{
	380	short ioaddr = dev->base_addr;
	381
	382	if (ei_debug > 1)
	383	printk("%s: Shutting down ethercard.\n", dev->name);
	384
	385	free_irq(dev->irq, dev);
	386	dev->irq = ei_status.saved_irq;
	387
	388	/* Shut off the interrupt line and secondary interface. */
	389	inb(ioaddr + E21_IRQ_LOW);
	390	outb(0, ioaddr + E21_ASIC);
	391	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
	392	outb(0, ioaddr + E21_ASIC);
	393
	394	ei_close(dev);
	395
	396	/* Double-check that the memory has been turned off, because really
	397	really bad things happen if it isn't. */
	398	mem_off(ioaddr);
	399
	400	return 0;
	401	}
	402
6aa20a22	403
1da177e4 LT	404	#ifdef MODULE
	405	#define MAX_E21_CARDS 4 /* Max number of E21 cards per module */
	406	static struct net_device *dev_e21[MAX_E21_CARDS];
	407	static int io[MAX_E21_CARDS];
	408	static int irq[MAX_E21_CARDS];
	409	static int mem[MAX_E21_CARDS];
	410	static int xcvr[MAX_E21_CARDS]; /* choose int. or ext. xcvr */
	411
	412	module_param_array(io, int, NULL, 0);
	413	module_param_array(irq, int, NULL, 0);
	414	module_param_array(mem, int, NULL, 0);
	415	module_param_array(xcvr, int, NULL, 0);
	416	MODULE_PARM_DESC(io, "I/O base address(es)");
	417	MODULE_PARM_DESC(irq, "IRQ number(s)");
	418	MODULE_PARM_DESC(mem, " memory base address(es)");
	419	MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
	420	MODULE_DESCRIPTION("Cabletron E2100 ISA ethernet driver");
	421	MODULE_LICENSE("GPL");
	422
	423	/* This is set up so that only a single autoprobe takes place per call.
	424	ISA device autoprobes on a running machine are not recommended. */
d543cbb6 AM	425
d543cbb6 AM	426	int __init init_module(void)
1da177e4 LT	427	{
	428	struct net_device *dev;
	429	int this_dev, found = 0;
	430
	431	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
	432	if (io[this_dev] == 0) {
	433	if (this_dev != 0) break; /* only autoprobe 1st one */
	434	printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n");
	435	}
	436	dev = alloc_ei_netdev();
	437	if (!dev)
	438	break;
	439	dev->irq = irq[this_dev];
	440	dev->base_addr = io[this_dev];
	441	dev->mem_start = mem[this_dev];
	442	dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
	443	if (do_e2100_probe(dev) == 0) {
b1fc5505	444	dev_e21[found++] = dev;
b1fc5505	445	continue;
1da177e4 LT	446	}
	447	free_netdev(dev);
	448	printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
	449	break;
	450	}
	451	if (found)
	452	return 0;
	453	return -ENXIO;
	454	}
	455
64916f1e DV	456	static void cleanup_card(struct net_device *dev)
	457	{
	458	/* NB: e21_close() handles free_irq */
	459	iounmap(ei_status.mem);
	460	release_region(dev->base_addr, E21_IO_EXTENT);
	461	}
	462
afc8eb46	463	void __exit
1da177e4 LT	464	cleanup_module(void)
	465	{
	466	int this_dev;
	467
	468	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
	469	struct net_device *dev = dev_e21[this_dev];
	470	if (dev) {
	471	unregister_netdev(dev);
	472	cleanup_card(dev);
	473	free_netdev(dev);
	474	}
	475	}
	476	}
	477	#endif /* MODULE */