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|
/* 3c503.c: A shared-memory NS8390 ethernet driver for linux. */
/*
Written 1992-94 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.
The author may be reached as becker@scyld.com, or C/O
Scyld Computing Corporation
410 Severn Ave., Suite 210
Annapolis MD 21403
This driver should work with the 3c503 and 3c503/16. It should be used
in shared memory mode for best performance, although it may also work
in programmed-I/O mode.
Sources:
EtherLink II Technical Reference Manual,
EtherLink II/16 Technical Reference Manual Supplement,
3Com Corporation, 5400 Bayfront Plaza, Santa Clara CA 95052-8145
The Crynwr 3c503 packet driver.
Changelog:
Paul Gortmaker : add support for the 2nd 8kB of RAM on 16 bit cards.
Paul Gortmaker : multiple card support for module users.
rjohnson@analogic.com : Fix up PIO interface for efficient operation.
Jeff Garzik : ethtool support
*/
#define DRV_NAME "3c503"
#define DRV_VERSION "1.10a"
#define DRV_RELDATE "11/17/2001"
static const char version[] =
DRV_NAME ".c:v" DRV_VERSION " " DRV_RELDATE " Donald Becker (becker@scyld.com)\n";
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/ethtool.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/byteorder.h>
#include "8390.h"
#include "3c503.h"
#define WRD_COUNT 4
static int el2_pio_probe(struct net_device *dev);
static int el2_probe1(struct net_device *dev, int ioaddr);
/* A zero-terminated list of I/O addresses to be probed in PIO mode. */
static unsigned int netcard_portlist[] __initdata =
{ 0x300,0x310,0x330,0x350,0x250,0x280,0x2a0,0x2e0,0};
#define EL2_IO_EXTENT 16
static int el2_open(struct net_device *dev);
static int el2_close(struct net_device *dev);
static void el2_reset_8390(struct net_device *dev);
static void el2_init_card(struct net_device *dev);
static void el2_block_output(struct net_device *dev, int count,
const unsigned char *buf, int start_page);
static void el2_block_input(struct net_device *dev, int count, struct sk_buff *skb,
int ring_offset);
static void el2_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
int ring_page);
static struct ethtool_ops netdev_ethtool_ops;
/* This routine probes for a memory-mapped 3c503 board by looking for
the "location register" at the end of the jumpered boot PROM space.
This works even if a PROM isn't there.
If the ethercard isn't found there is an optional probe for
ethercard jumpered to programmed-I/O mode.
*/
static int __init do_el2_probe(struct net_device *dev)
{
int *addr, addrs[] = { 0xddffe, 0xd9ffe, 0xcdffe, 0xc9ffe, 0};
int base_addr = dev->base_addr;
int irq = dev->irq;
SET_MODULE_OWNER(dev);
if (base_addr > 0x1ff) /* Check a single specified location. */
return el2_probe1(dev, base_addr);
else if (base_addr != 0) /* Don't probe at all. */
return -ENXIO;
for (addr = addrs; *addr; addr++) {
void __iomem *p = ioremap(*addr, 1);
unsigned base_bits;
int i;
if (!p)
continue;
base_bits = readb(p);
iounmap(p);
i = ffs(base_bits) - 1;
if (i == -1 || base_bits != (1 << i))
continue;
if (el2_probe1(dev, netcard_portlist[i]) == 0)
return 0;
dev->irq = irq;
}
#if ! defined(no_probe_nonshared_memory)
return el2_pio_probe(dev);
#else
return -ENODEV;
#endif
}
/* Try all of the locations that aren't obviously empty. This touches
a lot of locations, and is much riskier than the code above. */
static int __init
el2_pio_probe(struct net_device *dev)
{
int i;
int base_addr = dev->base_addr;
int irq = dev->irq;
if (base_addr > 0x1ff) /* Check a single specified location. */
return el2_probe1(dev, base_addr);
else if (base_addr != 0) /* Don't probe at all. */
return -ENXIO;
for (i = 0; netcard_portlist[i]; i++) {
if (el2_probe1(dev, netcard_portlist[i]) == 0)
return 0;
dev->irq = irq;
}
return -ENODEV;
}
#ifndef MODULE
struct net_device * __init el2_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_el2_probe(dev);
if (err)
goto out;
return dev;
out:
free_netdev(dev);
return ERR_PTR(err);
}
#endif
/* Probe for the Etherlink II card at I/O port base IOADDR,
returning non-zero on success. If found, set the station
address and memory parameters in DEVICE. */
static int __init
el2_probe1(struct net_device *dev, int ioaddr)
{
int i, iobase_reg, membase_reg, saved_406, wordlength, retval;
static unsigned version_printed;
unsigned long vendor_id;
if (!request_region(ioaddr, EL2_IO_EXTENT, DRV_NAME))
return -EBUSY;
if (!request_region(ioaddr + 0x400, 8, DRV_NAME)) {
retval = -EBUSY;
goto out;
}
/* Reset and/or avoid any lurking NE2000 */
if (inb(ioaddr + 0x408) == 0xff) {
mdelay(1);
retval = -ENODEV;
goto out1;
}
/* We verify that it's a 3C503 board by checking the first three octets
of its ethernet address. */
iobase_reg = inb(ioaddr+0x403);
membase_reg = inb(ioaddr+0x404);
/* ASIC location registers should be 0 or have only a single bit set. */
if ( (iobase_reg & (iobase_reg - 1))
|| (membase_reg & (membase_reg - 1))) {
retval = -ENODEV;
goto out1;
}
saved_406 = inb_p(ioaddr + 0x406);
outb_p(ECNTRL_RESET|ECNTRL_THIN, ioaddr
|