[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_close(struct net_device *dev);

\f
/*  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;

	SET_MODULE_OWNER(dev);

	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;
}

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);
}

#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;
	err = register_netdev(dev);
	if (err)
		goto out1;
	return dev;
out1:
	cleanup_card(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);

	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));

	/* Packet is always in one chunk -- we can copy + cksum. */
	eth_io_copy_and_sum(skb, ei_status.mem + (ring_offset & 0xff), count, 0);

	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;
}

\f
#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_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) {
			if (register_netdev(dev) == 0) {
				dev_e21[found++] = dev;
				continue;
			}
			cleanup_card(dev);
		}
		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;
}

void
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);
110
111	static int e21_close(struct net_device *dev);
112
113	\f
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
127	SET_MODULE_OWNER(dev);
128
129	if (base_addr > 0x1ff) /* Check a single specified location. */
130	return e21_probe1(dev, base_addr);
131	else if (base_addr != 0) /* Don't probe at all. */
132	return -ENXIO;
133
134	for (port = e21_probe_list; *port; port++) {
135	dev->irq = irq;
136	if (e21_probe1(dev, *port) == 0)
137	return 0;
138	}
139
140	return -ENODEV;
141	}
142
143	static void cleanup_card(struct net_device *dev)
144	{
145	/* NB: e21_close() handles free_irq */
146	iounmap(ei_status.mem);
147	release_region(dev->base_addr, E21_IO_EXTENT);
148	}
149
150	#ifndef MODULE
151	struct net_device * __init e2100_probe(int unit)
152	{
153	struct net_device *dev = alloc_ei_netdev();
154	int err;
155
156	if (!dev)
157	return ERR_PTR(-ENOMEM);
158
159	sprintf(dev->name, "eth%d", unit);
160	netdev_boot_setup_check(dev);
161
162	err = do_e2100_probe(dev);
163	if (err)
164	goto out;
165	err = register_netdev(dev);
166	if (err)
167	goto out1;
168	return dev;
169	out1:
170	cleanup_card(dev);
171	out:
172	free_netdev(dev);
173	return ERR_PTR(err);
174	}
175	#endif
176
177	static int __init e21_probe1(struct net_device *dev, int ioaddr)
178	{
179	int i, status, retval;
180	unsigned char *station_addr = dev->dev_addr;
181	static unsigned version_printed;
182
183	if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
184	return -EBUSY;
185
186	/* First check the station address for the Ctron prefix. */
187	if (inb(ioaddr + E21_SAPROM + 0) != 0x00
188	\|\| inb(ioaddr + E21_SAPROM + 1) != 0x00
189	\|\| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
190	retval = -ENODEV;
191	goto out;
192	}
193
194	/* Verify by making certain that there is a 8390 at there. */
195	outb(E8390_NODMA + E8390_STOP, ioaddr);
196	udelay(1); /* we want to delay one I/O cycle - which is 2MHz */
197	status = inb(ioaddr);
198	if (status != 0x21 && status != 0x23) {
199	retval = -ENODEV;
200	goto out;
201	}
202
203	/* Read the station address PROM. */
204	for (i = 0; i < 6; i++)
205	station_addr[i] = inb(ioaddr + E21_SAPROM + i);
206
207	inb(ioaddr + E21_MEDIA); /* Point to media selection. */
208	outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */
209
210	if (ei_debug && version_printed++ == 0)
211	printk(version);
212
213	for (i = 0; i < 6; i++)
214	printk(" %02X", station_addr[i]);
215
216	if (dev->irq < 2) {
217	int irqlist[] = {15,11,10,12,5,9,3,4}, i;
218	for (i = 0; i < 8; i++)
219	if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
220	dev->irq = irqlist[i];
221	break;
222	}
223	if (i >= 8) {
224	printk(" unable to get IRQ %d.\n", dev->irq);
225	retval = -EAGAIN;
226	goto out;
227	}
228	} else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */
229	dev->irq = 9;
230
231	/* The 8390 is at the base address. */
232	dev->base_addr = ioaddr;
233
234	ei_status.name = "E2100";
235	ei_status.word16 = 1;
236	ei_status.tx_start_page = E21_TX_START_PG;
237	ei_status.rx_start_page = E21_RX_START_PG;
238	ei_status.stop_page = E21_RX_STOP_PG;
239	ei_status.saved_irq = dev->irq;
240
241	/* Check the media port used. The port can be passed in on the
242	low mem_end bits. */
243	if (dev->mem_end & 15)
244	dev->if_port = dev->mem_end & 7;
245	else {
246	dev->if_port = 0;
247	inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */
248	for(i = 0; i < 6; i++)
249	if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
250	dev->if_port = 1;
251	break;
252	}
253	}
254
255	/* Never map in the E21 shared memory unless you are actively using it.
256	Also, the shared memory has effective only one setting -- spread all
257	over the 128K region! */
258	if (dev->mem_start == 0)
259	dev->mem_start = 0xd0000;
260
261	ei_status.mem = ioremap(dev->mem_start, 2*1024);
262	if (!ei_status.mem) {
263	printk("unable to remap memory\n");
264	retval = -EAGAIN;
265	goto out;
266	}
267
268	#ifdef notdef
269	/* These values are unused. The E2100 has a 2K window into the packet
270	buffer. The window can be set to start on any page boundary. */
271	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
272	dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
273	#endif
274
275	printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
276	dev->if_port ? "secondary" : "primary", dev->mem_start);
277
278	ei_status.reset_8390 = &e21_reset_8390;
279	ei_status.block_input = &e21_block_input;
280	ei_status.block_output = &e21_block_output;
281	ei_status.get_8390_hdr = &e21_get_8390_hdr;
282	dev->open = &e21_open;
283	dev->stop = &e21_close;
284	#ifdef CONFIG_NET_POLL_CONTROLLER
285	dev->poll_controller = ei_poll;
286	#endif
287	NS8390_init(dev, 0);
288
289	return 0;
290	out:
291	release_region(ioaddr, E21_IO_EXTENT);
292	return retval;
293	}
294
295	static int
296	e21_open(struct net_device *dev)
297	{
298	short ioaddr = dev->base_addr;
299	int retval;
300
301	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
302	return retval;
303
304	/* Set the interrupt line and memory base on the hardware. */
305	inb(ioaddr + E21_IRQ_LOW);
306	outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
307	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
308	outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
309	+ (dev->if_port ? E21_ALT_IFPORT : 0));
310	inb(ioaddr + E21_MEM_BASE);
311	outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));
312
313	ei_open(dev);
314	return 0;
315	}
316
317	static void
318	e21_reset_8390(struct net_device *dev)
319	{
320	short ioaddr = dev->base_addr;
321
322	outb(0x01, ioaddr);
323	if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
324	ei_status.txing = 0;
325
326	/* Set up the ASIC registers, just in case something changed them. */
327
328	if (ei_debug > 1) printk("reset done\n");
329	return;
330	}
331
332	/* Grab the 8390 specific header. We put the 2k window so the header page
333	appears at the start of the shared memory. */
334
335	static void
336	e21_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr, int ring_page)
337	{
338
339	short ioaddr = dev->base_addr;
340	char __iomem *shared_mem = ei_status.mem;
341
342	mem_on(ioaddr, shared_mem, ring_page);
343
344	#ifdef notdef
345	/* Officially this is what we are doing, but the readl() is faster */
346	memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
347	#else
348	((unsigned int*)hdr)[0] = readl(shared_mem);
349	#endif
350
351	/* Turn off memory access: we would need to reprogram the window anyway. */
352	mem_off(ioaddr);
353
354	}
355
356	/* Block input and output are easy on shared memory ethercards.
357	The E21xx makes block_input() especially easy by wrapping the top
358	ring buffer to the bottom automatically. */
359	static void
360	e21_block_input(struct net_device dev, int count, struct sk_buff skb, int ring_offset)
361	{
362	short ioaddr = dev->base_addr;
363	char __iomem *shared_mem = ei_status.mem;
364
365	mem_on(ioaddr, shared_mem, (ring_offset>>8));
366
367	/* Packet is always in one chunk -- we can copy + cksum. */
368	eth_io_copy_and_sum(skb, ei_status.mem + (ring_offset & 0xff), count, 0);
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
415	\f
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. */
437	int
438	init_module(void)
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) {
456	if (register_netdev(dev) == 0) {
457	dev_e21[found++] = dev;
458	continue;
459	}
460	cleanup_card(dev);
461	}
462	free_netdev(dev);
463	printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
464	break;
465	}
466	if (found)
467	return 0;
468	return -ENXIO;
469	}
470
471	void
472	cleanup_module(void)
473	{
474	int this_dev;
475
476	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
477	struct net_device *dev = dev_e21[this_dev];
478	if (dev) {
479	unregister_netdev(dev);
480	cleanup_card(dev);
481	free_netdev(dev);
482	}
483	}
484	}
485	#endif /* MODULE */