[GitHub/mt8127/android_kernel_alcatel_ttab.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);

\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;
}

#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));

	/* 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) {
			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
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
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
1da177e4 LT	143	#ifndef MODULE
	144	struct net_device * __init e2100_probe(int unit)
	145	{
	146	struct net_device *dev = alloc_ei_netdev();
	147	int err;
	148
	149	if (!dev)
	150	return ERR_PTR(-ENOMEM);
	151
	152	sprintf(dev->name, "eth%d", unit);
	153	netdev_boot_setup_check(dev);
	154
	155	err = do_e2100_probe(dev);
	156	if (err)
	157	goto out;
1da177e4	158	return dev;
1da177e4 LT	159	out:
	160	free_netdev(dev);
	161	return ERR_PTR(err);
	162	}
	163	#endif
	164
	165	static int __init e21_probe1(struct net_device *dev, int ioaddr)
	166	{
	167	int i, status, retval;
	168	unsigned char *station_addr = dev->dev_addr;
	169	static unsigned version_printed;
	170
	171	if (!request_region(ioaddr, E21_IO_EXTENT, DRV_NAME))
	172	return -EBUSY;
	173
	174	/* First check the station address for the Ctron prefix. */
	175	if (inb(ioaddr + E21_SAPROM + 0) != 0x00
	176	\|\| inb(ioaddr + E21_SAPROM + 1) != 0x00
	177	\|\| inb(ioaddr + E21_SAPROM + 2) != 0x1d) {
	178	retval = -ENODEV;
	179	goto out;
	180	}
	181
	182	/* Verify by making certain that there is a 8390 at there. */
	183	outb(E8390_NODMA + E8390_STOP, ioaddr);
	184	udelay(1); /* we want to delay one I/O cycle - which is 2MHz */
	185	status = inb(ioaddr);
	186	if (status != 0x21 && status != 0x23) {
	187	retval = -ENODEV;
	188	goto out;
	189	}
	190
	191	/* Read the station address PROM. */
	192	for (i = 0; i < 6; i++)
	193	station_addr[i] = inb(ioaddr + E21_SAPROM + i);
	194
	195	inb(ioaddr + E21_MEDIA); /* Point to media selection. */
	196	outb(0, ioaddr + E21_ASIC); /* and disable the secondary interface. */
	197
	198	if (ei_debug && version_printed++ == 0)
	199	printk(version);
	200
	201	for (i = 0; i < 6; i++)
	202	printk(" %02X", station_addr[i]);
	203
	204	if (dev->irq < 2) {
	205	int irqlist[] = {15,11,10,12,5,9,3,4}, i;
	206	for (i = 0; i < 8; i++)
	207	if (request_irq (irqlist[i], NULL, 0, "bogus", NULL) != -EBUSY) {
	208	dev->irq = irqlist[i];
	209	break;
	210	}
	211	if (i >= 8) {
	212	printk(" unable to get IRQ %d.\n", dev->irq);
	213	retval = -EAGAIN;
	214	goto out;
	215	}
	216	} else if (dev->irq == 2) /* Fixup luser bogosity: IRQ2 is really IRQ9 */
	217	dev->irq = 9;
	218
	219	/* The 8390 is at the base address. */
	220	dev->base_addr = ioaddr;
	221
	222	ei_status.name = "E2100";
223	ei_status.word16 = 1;
224	ei_status.tx_start_page = E21_TX_START_PG;
225	ei_status.rx_start_page = E21_RX_START_PG;
226	ei_status.stop_page = E21_RX_STOP_PG;
227	ei_status.saved_irq = dev->irq;
228
229	/* Check the media port used. The port can be passed in on the
230	low mem_end bits. */
231	if (dev->mem_end & 15)
232	dev->if_port = dev->mem_end & 7;
233	else {
234	dev->if_port = 0;
235	inb(ioaddr + E21_MEDIA); /* Turn automatic media detection on. */
236	for(i = 0; i < 6; i++)
237	if (station_addr[i] != inb(ioaddr + E21_SAPROM + 8 + i)) {
238	dev->if_port = 1;
239	break;
240	}
241	}
242
243	/* Never map in the E21 shared memory unless you are actively using it.
244	Also, the shared memory has effective only one setting -- spread all
245	over the 128K region! */
246	if (dev->mem_start == 0)
247	dev->mem_start = 0xd0000;
248
249	ei_status.mem = ioremap(dev->mem_start, 2*1024);
250	if (!ei_status.mem) {
251	printk("unable to remap memory\n");
252	retval = -EAGAIN;
253	goto out;
254	}
255
256	#ifdef notdef
257	/* These values are unused. The E2100 has a 2K window into the packet
258	buffer. The window can be set to start on any page boundary. */
259	ei_status.rmem_start = dev->mem_start + TX_PAGES*256;
260	dev->mem_end = ei_status.rmem_end = dev->mem_start + 2*1024;
261	#endif
262
263	printk(", IRQ %d, %s media, memory @ %#lx.\n", dev->irq,
264	dev->if_port ? "secondary" : "primary", dev->mem_start);
265
266	ei_status.reset_8390 = &e21_reset_8390;
267	ei_status.block_input = &e21_block_input;
268	ei_status.block_output = &e21_block_output;
269	ei_status.get_8390_hdr = &e21_get_8390_hdr;
270	dev->open = &e21_open;
271	dev->stop = &e21_close;
272	#ifdef CONFIG_NET_POLL_CONTROLLER
273	dev->poll_controller = ei_poll;
274	#endif
275	NS8390_init(dev, 0);
276
b1fc5505 HX	277	retval = register_netdev(dev);
	278	if (retval)
	279	goto out;
1da177e4 LT	280	return 0;
	281	out:
	282	release_region(ioaddr, E21_IO_EXTENT);
	283	return retval;
	284	}
	285
	286	static int
	287	e21_open(struct net_device *dev)
	288	{
	289	short ioaddr = dev->base_addr;
	290	int retval;
	291
	292	if ((retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev)))
	293	return retval;
	294
	295	/* Set the interrupt line and memory base on the hardware. */
	296	inb(ioaddr + E21_IRQ_LOW);
	297	outb(0, ioaddr + E21_ASIC + (dev->irq & 7));
	298	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
	299	outb(0, ioaddr + E21_ASIC + (dev->irq > 7 ? 1:0)
	300	+ (dev->if_port ? E21_ALT_IFPORT : 0));
	301	inb(ioaddr + E21_MEM_BASE);
	302	outb(0, ioaddr + E21_ASIC + ((dev->mem_start >> 17) & 7));
	303
	304	ei_open(dev);
	305	return 0;
	306	}
	307
	308	static void
	309	e21_reset_8390(struct net_device *dev)
	310	{
	311	short ioaddr = dev->base_addr;
	312
	313	outb(0x01, ioaddr);
	314	if (ei_debug > 1) printk("resetting the E2180x3 t=%ld...", jiffies);
	315	ei_status.txing = 0;
	316
	317	/* Set up the ASIC registers, just in case something changed them. */
	318
	319	if (ei_debug > 1) printk("reset done\n");
	320	return;
	321	}
	322
	323	/* Grab the 8390 specific header. We put the 2k window so the header page
	324	appears at the start of the shared memory. */
	325
	326	static void
	327	e21_get_8390_hdr(struct net_device dev, struct e8390_pkt_hdr hdr, int ring_page)
	328	{
	329
	330	short ioaddr = dev->base_addr;
	331	char __iomem *shared_mem = ei_status.mem;
	332
	333	mem_on(ioaddr, shared_mem, ring_page);
	334
	335	#ifdef notdef
	336	/* Officially this is what we are doing, but the readl() is faster */
	337	memcpy_fromio(hdr, shared_mem, sizeof(struct e8390_pkt_hdr));
	338	#else
	339	((unsigned int*)hdr)[0] = readl(shared_mem);
	340	#endif
	341
	342	/* Turn off memory access: we would need to reprogram the window anyway. */
	343	mem_off(ioaddr);
344
345	}
346
347	/* Block input and output are easy on shared memory ethercards.
348	The E21xx makes block_input() especially easy by wrapping the top
349	ring buffer to the bottom automatically. */
350	static void
351	e21_block_input(struct net_device dev, int count, struct sk_buff skb, int ring_offset)
352	{
353	short ioaddr = dev->base_addr;
354	char __iomem *shared_mem = ei_status.mem;
355
356	mem_on(ioaddr, shared_mem, (ring_offset>>8));
357
358	/* Packet is always in one chunk -- we can copy + cksum. */
359	eth_io_copy_and_sum(skb, ei_status.mem + (ring_offset & 0xff), count, 0);
360
361	mem_off(ioaddr);
362	}
363
364	static void
365	e21_block_output(struct net_device dev, int count, const unsigned char buf,
366	int start_page)
367	{
368	short ioaddr = dev->base_addr;
369	volatile char __iomem *shared_mem = ei_status.mem;
370
371	/* Set the shared memory window start by doing a read, with the low address
372	bits specifying the starting page. */
373	readb(shared_mem + start_page);
374	mem_on(ioaddr, shared_mem, start_page);
375
376	memcpy_toio(shared_mem, buf, count);
377	mem_off(ioaddr);
378	}
379
380	static int
381	e21_close(struct net_device *dev)
382	{
383	short ioaddr = dev->base_addr;
384
385	if (ei_debug > 1)
386	printk("%s: Shutting down ethercard.\n", dev->name);
387
388	free_irq(dev->irq, dev);
389	dev->irq = ei_status.saved_irq;
390
391	/* Shut off the interrupt line and secondary interface. */
392	inb(ioaddr + E21_IRQ_LOW);
393	outb(0, ioaddr + E21_ASIC);
394	inb(ioaddr + E21_IRQ_HIGH); /* High IRQ bit, and if_port. */
395	outb(0, ioaddr + E21_ASIC);
396
397	ei_close(dev);
398
399	/* Double-check that the memory has been turned off, because really
400	really bad things happen if it isn't. */
401	mem_off(ioaddr);
402
403	return 0;
404	}
405
406	\f
407	#ifdef MODULE
408	#define MAX_E21_CARDS 4 /* Max number of E21 cards per module */
409	static struct net_device *dev_e21[MAX_E21_CARDS];
410	static int io[MAX_E21_CARDS];
411	static int irq[MAX_E21_CARDS];
412	static int mem[MAX_E21_CARDS];
413	static int xcvr[MAX_E21_CARDS]; /* choose int. or ext. xcvr */
414
415	module_param_array(io, int, NULL, 0);
416	module_param_array(irq, int, NULL, 0);
417	module_param_array(mem, int, NULL, 0);
418	module_param_array(xcvr, int, NULL, 0);
419	MODULE_PARM_DESC(io, "I/O base address(es)");
420	MODULE_PARM_DESC(irq, "IRQ number(s)");
421	MODULE_PARM_DESC(mem, " memory base address(es)");
422	MODULE_PARM_DESC(xcvr, "transceiver(s) (0=internal, 1=external)");
423	MODULE_DESCRIPTION("Cabletron E2100 ISA ethernet driver");
424	MODULE_LICENSE("GPL");
425
426	/* This is set up so that only a single autoprobe takes place per call.
427	ISA device autoprobes on a running machine are not recommended. */
428	int
429	init_module(void)
430	{
431	struct net_device *dev;
432	int this_dev, found = 0;
433
434	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
435	if (io[this_dev] == 0) {
436	if (this_dev != 0) break; /* only autoprobe 1st one */
437	printk(KERN_NOTICE "e2100.c: Presently autoprobing (not recommended) for a single card.\n");
438	}
439	dev = alloc_ei_netdev();
440	if (!dev)
441	break;
442	dev->irq = irq[this_dev];
443	dev->base_addr = io[this_dev];
444	dev->mem_start = mem[this_dev];
445	dev->mem_end = xcvr[this_dev]; /* low 4bits = xcvr sel. */
446	if (do_e2100_probe(dev) == 0) {
b1fc5505 HX	447	dev_e21[found++] = dev;
b1fc5505 HX	448	continue;
1da177e4 LT	449	}
	450	free_netdev(dev);
	451	printk(KERN_WARNING "e2100.c: No E2100 card found (i/o = 0x%x).\n", io[this_dev]);
	452	break;
	453	}
	454	if (found)
	455	return 0;
	456	return -ENXIO;
	457	}
	458
64916f1e DV	459	static void cleanup_card(struct net_device *dev)
	460	{
	461	/* NB: e21_close() handles free_irq */
	462	iounmap(ei_status.mem);
	463	release_region(dev->base_addr, E21_IO_EXTENT);
	464	}
	465
1da177e4 LT	466	void
	467	cleanup_module(void)
	468	{
	469	int this_dev;
	470
	471	for (this_dev = 0; this_dev < MAX_E21_CARDS; this_dev++) {
	472	struct net_device *dev = dev_e21[this_dev];
	473	if (dev) {
	474	unregister_netdev(dev);
	475	cleanup_card(dev);
	476	free_netdev(dev);
	477	}
	478	}
	479	}
	480	#endif /* MODULE */