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linux/drivers/net/eexpress.c
Bruce Robson 46fa06170d [netdrvr] eexpress: IPv6 fails - multicast problems 
Taken from http://bugzilla.kernel.org/show_bug.cgi?id=10577

I was unable to access a computer containing an Intel EtherExpress 16 network
card using IPv6.

I traced this to failure of neighbour discovery.  When I used an "ip -6 neigh
add" command, on the computer attempting access, to insert a binding between
the IPv6 address of the computer with the Intel EtherExpress 16 network card
and the card's ethernet address, I was able to access that computer using
IPv6.

Neighbour discovery requires working multicast.  The driver sources file
eexpress.c contains an approximately 30 line function eexp_setup_filter used
when loading multicast addresses.

I found 3 problems in this function

1) It wrote the number of multicast addresses to the card instead of the
    number of bytes in the multicast addresses.

2) When loading multiple multicast addresses it loaded the first one
    provided multiple times instead of loading each one once.

3) The setting of pointer 'data' from 'dmi->dmi_addr' occured before the
    test for the error situation of 'dmi' being NULL.

Correcting these problems allows the computer with the Intel EtherExpress 16
network card to found by IPv6 neighbour discovery.

p.s. There is some information on the Intel EtherExpress 16 at
http://www.intel.com/support/etherexpress/vintage/sb/cs-013500.htm
Datasheet for the Intel 82586 ethernet controller used by the card
http://www.datasheetcatalog.com/datasheets_pdf/8/2/5/8/82586.shtml

Signed-off-by: Bruce Robson <bns_robson@hotmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-05-06 12:22:34 -04:00

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/* Intel EtherExpress 16 device driver for Linux
*
* Written by John Sullivan, 1995
* based on original code by Donald Becker, with changes by
* Alan Cox and Pauline Middelink.
*
* Support for 8-bit mode by Zoltan Szilagyi <zoltans@cs.arizona.edu>
*
* Many modifications, and currently maintained, by
* Philip Blundell <philb@gnu.org>
* Added the Compaq LTE Alan Cox <alan@redhat.com>
* Added MCA support Adam Fritzler
*
* Note - this driver is experimental still - it has problems on faster
* machines. Someone needs to sit down and go through it line by line with
* a databook...
*/
/* The EtherExpress 16 is a fairly simple card, based on a shared-memory
* design using the i82586 Ethernet coprocessor. It bears no relationship,
* as far as I know, to the similarly-named "EtherExpress Pro" range.
*
* Historically, Linux support for these cards has been very bad. However,
* things seem to be getting better slowly.
*/
/* If your card is confused about what sort of interface it has (eg it
* persistently reports "10baseT" when none is fitted), running 'SOFTSET /BART'
* or 'SOFTSET /LISA' from DOS seems to help.
*/
/* Here's the scoop on memory mapping.
*
* There are three ways to access EtherExpress card memory: either using the
* shared-memory mapping, or using PIO through the dataport, or using PIO
* through the "shadow memory" ports.
*
* The shadow memory system works by having the card map some of its memory
* as follows:
*
* (the low five bits of the SMPTR are ignored)
*
* base+0x4000..400f memory at SMPTR+0..15
* base+0x8000..800f memory at SMPTR+16..31
* base+0xc000..c007 dubious stuff (memory at SMPTR+16..23 apparently)
* base+0xc008..c00f memory at 0x0008..0x000f
*
* This last set (the one at c008) is particularly handy because the SCB
* lives at 0x0008. So that set of ports gives us easy random access to data
* in the SCB without having to mess around setting up pointers and the like.
* We always use this method to access the SCB (via the scb_xx() functions).
*
* Dataport access works by aiming the appropriate (read or write) pointer
* at the first address you're interested in, and then reading or writing from
* the dataport. The pointers auto-increment after each transfer. We use
* this for data transfer.
*
* We don't use the shared-memory system because it allegedly doesn't work on
* all cards, and because it's a bit more prone to go wrong (it's one more
* thing to configure...).
*/
/* Known bugs:
*
* - The card seems to want to give us two interrupts every time something
* happens, where just one would be better.
*/
/*
*
* Note by Zoltan Szilagyi 10-12-96:
*
* I've succeeded in eliminating the "CU wedged" messages, and hence the
* lockups, which were only occurring with cards running in 8-bit mode ("force
* 8-bit operation" in Intel's SoftSet utility). This version of the driver
* sets the 82586 and the ASIC to 8-bit mode at startup; it also stops the
* CU before submitting a packet for transmission, and then restarts it as soon
* as the process of handing the packet is complete. This is definitely an
* unnecessary slowdown if the card is running in 16-bit mode; therefore one
* should detect 16-bit vs 8-bit mode from the EEPROM settings and act
* accordingly. In 8-bit mode with this bugfix I'm getting about 150 K/s for
* ftp's, which is significantly better than I get in DOS, so the overhead of
* stopping and restarting the CU with each transmit is not prohibitive in
* practice.
*
* Update by David Woodhouse 11/5/99:
*
* I've seen "CU wedged" messages in 16-bit mode, on the Alpha architecture.
* I assume that this is because 16-bit accesses are actually handled as two
* 8-bit accesses.
*/
#ifdef __alpha__
#define LOCKUP16 1
#endif
#ifndef LOCKUP16
#define LOCKUP16 0
#endif
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/string.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/mca-legacy.h>
#include <linux/spinlock.h>
#include <linux/bitops.h>
#include <linux/jiffies.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#ifndef NET_DEBUG
#define NET_DEBUG 4
#endif
#include "eexpress.h"
#define EEXP_IO_EXTENT 16
/*
* Private data declarations
*/
struct net_local
{
unsigned long last_tx; /* jiffies when last transmit started */
unsigned long init_time; /* jiffies when eexp_hw_init586 called */
unsigned short rx_first; /* first rx buf, same as RX_BUF_START */
unsigned short rx_last; /* last rx buf */
unsigned short rx_ptr; /* first rx buf to look at */
unsigned short tx_head; /* next free tx buf */
unsigned short tx_reap; /* first in-use tx buf */
unsigned short tx_tail; /* previous tx buf to tx_head */
unsigned short tx_link; /* last known-executing tx buf */
unsigned short last_tx_restart; /* set to tx_link when we
restart the CU */
unsigned char started;
unsigned short rx_buf_start;
unsigned short rx_buf_end;
unsigned short num_tx_bufs;
unsigned short num_rx_bufs;
unsigned char width; /* 0 for 16bit, 1 for 8bit */
unsigned char was_promisc;
unsigned char old_mc_count;
spinlock_t lock;
};
/* This is the code and data that is downloaded to the EtherExpress card's
* memory at boot time.
*/
static unsigned short start_code[] = {
/* 0x0000 */
0x0001, /* ISCP: busy - cleared after reset */
0x0008,0x0000,0x0000, /* offset,address (lo,hi) of SCB */
0x0000,0x0000, /* SCB: status, commands */
0x0000,0x0000, /* links to first command block,
first receive descriptor */
0x0000,0x0000, /* CRC error, alignment error counts */
0x0000,0x0000, /* out of resources, overrun error counts */
0x0000,0x0000, /* pad */
0x0000,0x0000,
/* 0x20 -- start of 82586 CU program */
#define CONF_LINK 0x20
0x0000,Cmd_Config,
0x0032, /* link to next command */
0x080c, /* 12 bytes follow : fifo threshold=8 */
0x2e40, /* don't rx bad frames
* SRDY/ARDY => ext. sync. : preamble len=8
* take addresses from data buffers
* 6 bytes/address
*/
0x6000, /* default backoff method & priority
* interframe spacing = 0x60 */
0xf200, /* slot time=0x200
* max collision retry = 0xf */
#define CONF_PROMISC 0x2e
0x0000, /* no HDLC : normal CRC : enable broadcast
* disable promiscuous/multicast modes */
0x003c, /* minimum frame length = 60 octets) */
0x0000,Cmd_SetAddr,
0x003e, /* link to next command */
#define CONF_HWADDR 0x38
0x0000,0x0000,0x0000, /* hardware address placed here */
0x0000,Cmd_MCast,
0x0076, /* link to next command */
#define CONF_NR_MULTICAST 0x44
0x0000, /* number of bytes in multicast address(es) */
#define CONF_MULTICAST 0x46
0x0000, 0x0000, 0x0000, /* some addresses */
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000,
#define CONF_DIAG_RESULT 0x76
0x0000, Cmd_Diag,
0x007c, /* link to next command */
0x0000,Cmd_TDR|Cmd_INT,
0x0084,
#define CONF_TDR_RESULT 0x82
0x0000,
0x0000,Cmd_END|Cmd_Nop, /* end of configure sequence */
0x0084 /* dummy link */
};
/* maps irq number to EtherExpress magic value */
static char irqrmap[] = { 0,0,1,2,3,4,0,0,0,1,5,6,0,0,0,0 };
#ifdef CONFIG_MCA_LEGACY
/* mapping of the first four bits of the second POS register */
static unsigned short mca_iomap[] = {
0x270, 0x260, 0x250, 0x240, 0x230, 0x220, 0x210, 0x200,
0x370, 0x360, 0x350, 0x340, 0x330, 0x320, 0x310, 0x300
};
/* bits 5-7 of the second POS register */
static char mca_irqmap[] = { 12, 9, 3, 4, 5, 10, 11, 15 };
#endif
/*
* Prototypes for Linux interface
*/
static int eexp_open(struct net_device *dev);
static int eexp_close(struct net_device *dev);
static void eexp_timeout(struct net_device *dev);
static int eexp_xmit(struct sk_buff *buf, struct net_device *dev);
static irqreturn_t eexp_irq(int irq, void *dev_addr);
static void eexp_set_multicast(struct net_device *dev);
/*
* Prototypes for hardware access functions
*/
static void eexp_hw_rx_pio(struct net_device *dev);
static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
unsigned short len);
static int eexp_hw_probe(struct net_device *dev,unsigned short ioaddr);
static unsigned short eexp_hw_readeeprom(unsigned short ioaddr,
unsigned char location);
static unsigned short eexp_hw_lasttxstat(struct net_device *dev);
static void eexp_hw_txrestart(struct net_device *dev);
static void eexp_hw_txinit (struct net_device *dev);
static void eexp_hw_rxinit (struct net_device *dev);
static void eexp_hw_init586 (struct net_device *dev);
static void eexp_setup_filter (struct net_device *dev);
static char *eexp_ifmap[]={"AUI", "BNC", "RJ45"};
enum eexp_iftype {AUI=0, BNC=1, TPE=2};
#define STARTED_RU 2
#define STARTED_CU 1
/*
* Primitive hardware access functions.
*/
static inline unsigned short scb_status(struct net_device *dev)
{
return inw(dev->base_addr + 0xc008);
}
static inline unsigned short scb_rdcmd(struct net_device *dev)
{
return inw(dev->base_addr + 0xc00a);
}
static inline void scb_command(struct net_device *dev, unsigned short cmd)
{
outw(cmd, dev->base_addr + 0xc00a);
}
static inline void scb_wrcbl(struct net_device *dev, unsigned short val)
{
outw(val, dev->base_addr + 0xc00c);
}
static inline void scb_wrrfa(struct net_device *dev, unsigned short val)
{
outw(val, dev->base_addr + 0xc00e);
}
static inline void set_loopback(struct net_device *dev)
{
outb(inb(dev->base_addr + Config) | 2, dev->base_addr + Config);
}
static inline void clear_loopback(struct net_device *dev)
{
outb(inb(dev->base_addr + Config) & ~2, dev->base_addr + Config);
}
static inline unsigned short int SHADOW(short int addr)
{
addr &= 0x1f;
if (addr > 0xf) addr += 0x3ff0;
return addr + 0x4000;
}
/*
* Linux interface
*/
/*
* checks for presence of EtherExpress card
*/
static int __init do_express_probe(struct net_device *dev)
{
unsigned short *port;
static unsigned short ports[] = { 0x240,0x300,0x310,0x270,0x320,0x340,0 };
unsigned short ioaddr = dev->base_addr;
int dev_irq = dev->irq;
int err;
dev->if_port = 0xff; /* not set */
#ifdef CONFIG_MCA_LEGACY
if (MCA_bus) {
int slot = 0;
/*
* Only find one card at a time. Subsequent calls
* will find others, however, proper multicard MCA
* probing and setup can't be done with the
* old-style Space.c init routines. -- ASF
*/
while (slot != MCA_NOTFOUND) {
int pos0, pos1;
slot = mca_find_unused_adapter(0x628B, slot);
if (slot == MCA_NOTFOUND)
break;
pos0 = mca_read_stored_pos(slot, 2);
pos1 = mca_read_stored_pos(slot, 3);
ioaddr = mca_iomap[pos1&0xf];
dev->irq = mca_irqmap[(pos1>>4)&0x7];
/*
* XXX: Transciever selection is done
* differently on the MCA version.
* How to get it to select something
* other than external/AUI is currently
* unknown. This code is just for looks. -- ASF
*/
if ((pos0 & 0x7) == 0x1)
dev->if_port = AUI;
else if ((pos0 & 0x7) == 0x5) {
if (pos1 & 0x80)
dev->if_port = BNC;
else
dev->if_port = TPE;
}
mca_set_adapter_name(slot, "Intel EtherExpress 16 MCA");
mca_set_adapter_procfn(slot, NULL, dev);
mca_mark_as_used(slot);
break;
}
}
#endif
if (ioaddr&0xfe00) {
if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress"))
return -EBUSY;
err = eexp_hw_probe(dev,ioaddr);
release_region(ioaddr, EEXP_IO_EXTENT);
return err;
} else if (ioaddr)
return -ENXIO;
for (port=&ports[0] ; *port ; port++ )
{
unsigned short sum = 0;
int i;
if (!request_region(*port, EEXP_IO_EXTENT, "EtherExpress"))
continue;
for ( i=0 ; i<4 ; i++ )
{
unsigned short t;
t = inb(*port + ID_PORT);
sum |= (t>>4) << ((t & 0x03)<<2);
}
if (sum==0xbaba && !eexp_hw_probe(dev,*port)) {
release_region(*port, EEXP_IO_EXTENT);
return 0;
}
release_region(*port, EEXP_IO_EXTENT);
dev->irq = dev_irq;
}
return -ENODEV;
}
#ifndef MODULE
struct net_device * __init express_probe(int unit)
{
struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
int err;
if (!dev)
return ERR_PTR(-ENOMEM);
sprintf(dev->name, "eth%d", unit);
netdev_boot_setup_check(dev);
err = do_express_probe(dev);
if (!err)
return dev;
free_netdev(dev);
return ERR_PTR(err);
}
#endif
/*
* open and initialize the adapter, ready for use
*/
static int eexp_open(struct net_device *dev)
{
int ret;
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = netdev_priv(dev);
#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_open()\n", dev->name);
#endif
if (!dev->irq || !irqrmap[dev->irq])
return -ENXIO;
ret = request_irq(dev->irq, &eexp_irq, 0, dev->name, dev);
if (ret)
return ret;
if (!request_region(ioaddr, EEXP_IO_EXTENT, "EtherExpress")) {
printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
, ioaddr);
goto err_out1;
}
if (!request_region(ioaddr+0x4000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
, ioaddr+0x4000);
goto err_out2;
}
if (!request_region(ioaddr+0x8000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
, ioaddr+0x8000);
goto err_out3;
}
if (!request_region(ioaddr+0xc000, EEXP_IO_EXTENT, "EtherExpress shadow")) {
printk(KERN_WARNING "EtherExpress io port %x, is busy.\n"
, ioaddr+0xc000);
goto err_out4;
}
if (lp->width) {
printk("%s: forcing ASIC to 8-bit mode\n", dev->name);
outb(inb(dev->base_addr+Config)&~4, dev->base_addr+Config);
}
eexp_hw_init586(dev);
netif_start_queue(dev);
#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: leaving eexp_open()\n", dev->name);
#endif
return 0;
err_out4:
release_region(ioaddr+0x8000, EEXP_IO_EXTENT);
err_out3:
release_region(ioaddr+0x4000, EEXP_IO_EXTENT);
err_out2:
release_region(ioaddr, EEXP_IO_EXTENT);
err_out1:
free_irq(dev->irq, dev);
return -EBUSY;
}
/*
* close and disable the interface, leaving the 586 in reset.
*/
static int eexp_close(struct net_device *dev)
{
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = netdev_priv(dev);
int irq = dev->irq;
netif_stop_queue(dev);
outb(SIRQ_dis|irqrmap[irq],ioaddr+SET_IRQ);
lp->started = 0;
scb_command(dev, SCB_CUsuspend|SCB_RUsuspend);
outb(0,ioaddr+SIGNAL_CA);
free_irq(irq,dev);
outb(i586_RST,ioaddr+EEPROM_Ctrl);
release_region(ioaddr, EEXP_IO_EXTENT);
release_region(ioaddr+0x4000, 16);
release_region(ioaddr+0x8000, 16);
release_region(ioaddr+0xc000, 16);
return 0;
}
/*
* This gets called when a higher level thinks we are broken. Check that
* nothing has become jammed in the CU.
*/
static void unstick_cu(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short ioaddr = dev->base_addr;
if (lp->started)
{
if (time_after(jiffies, dev->trans_start + 50))
{
if (lp->tx_link==lp->last_tx_restart)
{
unsigned short boguscount=200,rsst;
printk(KERN_WARNING "%s: Retransmit timed out, status %04x, resetting...\n",
dev->name, scb_status(dev));
eexp_hw_txinit(dev);
lp->last_tx_restart = 0;
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
while (!SCB_complete(rsst=scb_status(dev)))
{
if (!--boguscount)
{
boguscount=200;
printk(KERN_WARNING "%s: Reset timed out status %04x, retrying...\n",
dev->name,rsst);
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
}
}
netif_wake_queue(dev);
}
else
{
unsigned short status = scb_status(dev);
if (SCB_CUdead(status))
{
unsigned short txstatus = eexp_hw_lasttxstat(dev);
printk(KERN_WARNING "%s: Transmit timed out, CU not active status %04x %04x, restarting...\n",
dev->name, status, txstatus);
eexp_hw_txrestart(dev);
}
else
{
unsigned short txstatus = eexp_hw_lasttxstat(dev);
if (netif_queue_stopped(dev) && !txstatus)
{
printk(KERN_WARNING "%s: CU wedged, status %04x %04x, resetting...\n",
dev->name,status,txstatus);
eexp_hw_init586(dev);
netif_wake_queue(dev);
}
else
{
printk(KERN_WARNING "%s: transmit timed out\n", dev->name);
}
}
}
}
}
else
{
if (time_after(jiffies, lp->init_time + 10))
{
unsigned short status = scb_status(dev);
printk(KERN_WARNING "%s: i82586 startup timed out, status %04x, resetting...\n",
dev->name, status);
eexp_hw_init586(dev);
netif_wake_queue(dev);
}
}
}
static void eexp_timeout(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
#ifdef CONFIG_SMP
unsigned long flags;
#endif
int status;
disable_irq(dev->irq);
/*
* Best would be to use synchronize_irq(); spin_lock() here
* lets make it work first..
*/
#ifdef CONFIG_SMP
spin_lock_irqsave(&lp->lock, flags);
#endif
status = scb_status(dev);
unstick_cu(dev);
printk(KERN_INFO "%s: transmit timed out, %s?\n", dev->name,
(SCB_complete(status)?"lost interrupt":
"board on fire"));
dev->stats.tx_errors++;
lp->last_tx = jiffies;
if (!SCB_complete(status)) {
scb_command(dev, SCB_CUabort);
outb(0,dev->base_addr+SIGNAL_CA);
}
netif_wake_queue(dev);
#ifdef CONFIG_SMP
spin_unlock_irqrestore(&lp->lock, flags);
#endif
}
/*
* Called to transmit a packet, or to allow us to right ourselves
* if the kernel thinks we've died.
*/
static int eexp_xmit(struct sk_buff *buf, struct net_device *dev)
{
short length = buf->len;
#ifdef CONFIG_SMP
struct net_local *lp = netdev_priv(dev);
unsigned long flags;
#endif
#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_xmit()\n", dev->name);
#endif
if (buf->len < ETH_ZLEN) {
if (skb_padto(buf, ETH_ZLEN))
return 0;
length = ETH_ZLEN;
}
disable_irq(dev->irq);
/*
* Best would be to use synchronize_irq(); spin_lock() here
* lets make it work first..
*/
#ifdef CONFIG_SMP
spin_lock_irqsave(&lp->lock, flags);
#endif
{
unsigned short *data = (unsigned short *)buf->data;
dev->stats.tx_bytes += length;
eexp_hw_tx_pio(dev,data,length);
}
dev_kfree_skb(buf);
#ifdef CONFIG_SMP
spin_unlock_irqrestore(&lp->lock, flags);
#endif
enable_irq(dev->irq);
return 0;
}
/*
* Handle an EtherExpress interrupt
* If we've finished initializing, start the RU and CU up.
* If we've already started, reap tx buffers, handle any received packets,
* check to make sure we've not become wedged.
*/
static unsigned short eexp_start_irq(struct net_device *dev,
unsigned short status)
{
unsigned short ack_cmd = SCB_ack(status);
struct net_local *lp = netdev_priv(dev);
unsigned short ioaddr = dev->base_addr;
if ((dev->flags & IFF_UP) && !(lp->started & STARTED_CU)) {
short diag_status, tdr_status;
while (SCB_CUstat(status)==2)
status = scb_status(dev);
#if NET_DEBUG > 4
printk("%s: CU went non-active (status %04x)\n",
dev->name, status);
#endif
outw(CONF_DIAG_RESULT & ~31, ioaddr + SM_PTR);
diag_status = inw(ioaddr + SHADOW(CONF_DIAG_RESULT));
if (diag_status & 1<<11) {
printk(KERN_WARNING "%s: 82586 failed self-test\n",
dev->name);
} else if (!(diag_status & 1<<13)) {
printk(KERN_WARNING "%s: 82586 self-test failed to complete\n", dev->name);
}
outw(CONF_TDR_RESULT & ~31, ioaddr + SM_PTR);
tdr_status = inw(ioaddr + SHADOW(CONF_TDR_RESULT));
if (tdr_status & (TDR_SHORT|TDR_OPEN)) {
printk(KERN_WARNING "%s: TDR reports cable %s at %d tick%s\n", dev->name, (tdr_status & TDR_SHORT)?"short":"broken", tdr_status & TDR_TIME, ((tdr_status & TDR_TIME) != 1) ? "s" : "");
}
else if (tdr_status & TDR_XCVRPROBLEM) {
printk(KERN_WARNING "%s: TDR reports transceiver problem\n", dev->name);
}
else if (tdr_status & TDR_LINKOK) {
#if NET_DEBUG > 4
printk(KERN_DEBUG "%s: TDR reports link OK\n", dev->name);
#endif
} else {
printk("%s: TDR is ga-ga (status %04x)\n", dev->name,
tdr_status);
}
lp->started |= STARTED_CU;
scb_wrcbl(dev, lp->tx_link);
/* if the RU isn't running, start it now */
if (!(lp->started & STARTED_RU)) {
ack_cmd |= SCB_RUstart;
scb_wrrfa(dev, lp->rx_buf_start);
lp->rx_ptr = lp->rx_buf_start;
lp->started |= STARTED_RU;
}
ack_cmd |= SCB_CUstart | 0x2000;
}
if ((dev->flags & IFF_UP) && !(lp->started & STARTED_RU) && SCB_RUstat(status)==4)
lp->started|=STARTED_RU;
return ack_cmd;
}
static void eexp_cmd_clear(struct net_device *dev)
{
unsigned long int oldtime = jiffies;
while (scb_rdcmd(dev) && (time_before(jiffies, oldtime + 10)));
if (scb_rdcmd(dev)) {
printk("%s: command didn't clear\n", dev->name);
}
}
static irqreturn_t eexp_irq(int dummy, void *dev_info)
{
struct net_device *dev = dev_info;
struct net_local *lp;
unsigned short ioaddr,status,ack_cmd;
unsigned short old_read_ptr, old_write_ptr;
lp = netdev_priv(dev);
ioaddr = dev->base_addr;
spin_lock(&lp->lock);
old_read_ptr = inw(ioaddr+READ_PTR);
old_write_ptr = inw(ioaddr+WRITE_PTR);
outb(SIRQ_dis|irqrmap[dev->irq], ioaddr+SET_IRQ);
status = scb_status(dev);
#if NET_DEBUG > 4
printk(KERN_DEBUG "%s: interrupt (status %x)\n", dev->name, status);
#endif
if (lp->started == (STARTED_CU | STARTED_RU)) {
do {
eexp_cmd_clear(dev);
ack_cmd = SCB_ack(status);
scb_command(dev, ack_cmd);
outb(0,ioaddr+SIGNAL_CA);
eexp_cmd_clear(dev);
if (SCB_complete(status)) {
if (!eexp_hw_lasttxstat(dev)) {
printk("%s: tx interrupt but no status\n", dev->name);
}
}
if (SCB_rxdframe(status))
eexp_hw_rx_pio(dev);
status = scb_status(dev);
} while (status & 0xc000);
if (SCB_RUdead(status))
{
printk(KERN_WARNING "%s: RU stopped: status %04x\n",
dev->name,status);
#if 0
printk(KERN_WARNING "%s: cur_rfd=%04x, cur_rbd=%04x\n", dev->name, lp->cur_rfd, lp->cur_rbd);
outw(lp->cur_rfd, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: [%04x]\n", dev->name, inw(ioaddr+DATAPORT));
outw(lp->cur_rfd+6, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: rbd is %04x\n", dev->name, rbd= inw(ioaddr+DATAPORT));
outw(rbd, ioaddr+READ_PTR);
printk(KERN_WARNING "%s: [%04x %04x] ", dev->name, inw(ioaddr+DATAPORT), inw(ioaddr+DATAPORT));
outw(rbd+8, ioaddr+READ_PTR);
printk("[%04x]\n", inw(ioaddr+DATAPORT));
#endif
dev->stats.rx_errors++;
#if 1
eexp_hw_rxinit(dev);
#else
lp->cur_rfd = lp->first_rfd;
#endif
scb_wrrfa(dev, lp->rx_buf_start);
scb_command(dev, SCB_RUstart);
outb(0,ioaddr+SIGNAL_CA);
}
} else {
if (status & 0x8000)
ack_cmd = eexp_start_irq(dev, status);
else
ack_cmd = SCB_ack(status);
scb_command(dev, ack_cmd);
outb(0,ioaddr+SIGNAL_CA);
}
eexp_cmd_clear(dev);
outb(SIRQ_en|irqrmap[dev->irq], ioaddr+SET_IRQ);
#if NET_DEBUG > 6
printk("%s: leaving eexp_irq()\n", dev->name);
#endif
outw(old_read_ptr, ioaddr+READ_PTR);
outw(old_write_ptr, ioaddr+WRITE_PTR);
spin_unlock(&lp->lock);
return IRQ_HANDLED;
}
/*
* Hardware access functions
*/
/*
* Set the cable type to use.
*/
static void eexp_hw_set_interface(struct net_device *dev)
{
unsigned char oldval = inb(dev->base_addr + 0x300e);
oldval &= ~0x82;
switch (dev->if_port) {
case TPE:
oldval |= 0x2;
case BNC:
oldval |= 0x80;
break;
}
outb(oldval, dev->base_addr+0x300e);
mdelay(20);
}
/*
* Check all the receive buffers, and hand any received packets
* to the upper levels. Basic sanity check on each frame
* descriptor, though we don't bother trying to fix broken ones.
*/
static void eexp_hw_rx_pio(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short rx_block = lp->rx_ptr;
unsigned short boguscount = lp->num_rx_bufs;
unsigned short ioaddr = dev->base_addr;
unsigned short status;
#if NET_DEBUG > 6
printk(KERN_DEBUG "%s: eexp_hw_rx()\n", dev->name);
#endif
do {
unsigned short rfd_cmd, rx_next, pbuf, pkt_len;
outw(rx_block, ioaddr + READ_PTR);
status = inw(ioaddr + DATAPORT);
if (FD_Done(status))
{
rfd_cmd = inw(ioaddr + DATAPORT);
rx_next = inw(ioaddr + DATAPORT);
pbuf = inw(ioaddr + DATAPORT);
outw(pbuf, ioaddr + READ_PTR);
pkt_len = inw(ioaddr + DATAPORT);
if (rfd_cmd!=0x0000)
{
printk(KERN_WARNING "%s: rfd_cmd not zero:0x%04x\n",
dev->name, rfd_cmd);
continue;
}
else if (pbuf!=rx_block+0x16)
{
printk(KERN_WARNING "%s: rfd and rbd out of sync 0x%04x 0x%04x\n",
dev->name, rx_block+0x16, pbuf);
continue;
}
else if ((pkt_len & 0xc000)!=0xc000)
{
printk(KERN_WARNING "%s: EOF or F not set on received buffer (%04x)\n",
dev->name, pkt_len & 0xc000);
continue;
}
else if (!FD_OK(status))
{
dev->stats.rx_errors++;
if (FD_CRC(status))
dev->stats.rx_crc_errors++;
if (FD_Align(status))
dev->stats.rx_frame_errors++;
if (FD_Resrc(status))
dev->stats.rx_fifo_errors++;
if (FD_DMA(status))
dev->stats.rx_over_errors++;
if (FD_Short(status))
dev->stats.rx_length_errors++;
}
else
{
struct sk_buff *skb;
pkt_len &= 0x3fff;
skb = dev_alloc_skb(pkt_len+16);
if (skb == NULL)
{
printk(KERN_WARNING "%s: Memory squeeze, dropping packet\n",dev->name);
dev->stats.rx_dropped++;
break;
}
skb_reserve(skb, 2);
outw(pbuf+10, ioaddr+READ_PTR);
insw(ioaddr+DATAPORT, skb_put(skb,pkt_len),(pkt_len+1)>>1);
skb->protocol = eth_type_trans(skb,dev);
netif_rx(skb);
dev->last_rx = jiffies;
dev->stats.rx_packets++;
dev->stats.rx_bytes += pkt_len;
}
outw(rx_block, ioaddr+WRITE_PTR);
outw(0, ioaddr+DATAPORT);
outw(0, ioaddr+DATAPORT);
rx_block = rx_next;
}
} while (FD_Done(status) && boguscount--);
lp->rx_ptr = rx_block;
}
/*
* Hand a packet to the card for transmission
* If we get here, we MUST have already checked
* to make sure there is room in the transmit
* buffer region.
*/
static void eexp_hw_tx_pio(struct net_device *dev, unsigned short *buf,
unsigned short len)
{
struct net_local *lp = netdev_priv(dev);
unsigned short ioaddr = dev->base_addr;
if (LOCKUP16 || lp->width) {
/* Stop the CU so that there is no chance that it
jumps off to a bogus address while we are writing the
pointer to the next transmit packet in 8-bit mode --
this eliminates the "CU wedged" errors in 8-bit mode.
(Zoltan Szilagyi 10-12-96) */
scb_command(dev, SCB_CUsuspend);
outw(0xFFFF, ioaddr+SIGNAL_CA);
}
outw(lp->tx_head, ioaddr + WRITE_PTR);
outw(0x0000, ioaddr + DATAPORT);
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
outw(lp->tx_head+0x08, ioaddr + DATAPORT);
outw(lp->tx_head+0x0e, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(lp->tx_head+0x08, ioaddr + DATAPORT);
outw(0x8000|len, ioaddr + DATAPORT);
outw(-1, ioaddr + DATAPORT);
outw(lp->tx_head+0x16, ioaddr + DATAPORT);
outw(0, ioaddr + DATAPORT);
outsw(ioaddr + DATAPORT, buf, (len+1)>>1);
outw(lp->tx_tail+0xc, ioaddr + WRITE_PTR);
outw(lp->tx_head, ioaddr + DATAPORT);
dev->trans_start = jiffies;
lp->tx_tail = lp->tx_head;
if (lp->tx_head==TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
lp->tx_head = TX_BUF_START;
else
lp->tx_head += TX_BUF_SIZE;
if (lp->tx_head != lp->tx_reap)
netif_wake_queue(dev);
if (LOCKUP16 || lp->width) {
/* Restart the CU so that the packet can actually
be transmitted. (Zoltan Szilagyi 10-12-96) */
scb_command(dev, SCB_CUresume);
outw(0xFFFF, ioaddr+SIGNAL_CA);
}
dev->stats.tx_packets++;
lp->last_tx = jiffies;
}
/*
* Sanity check the suspected EtherExpress card
* Read hardware address, reset card, size memory and initialize buffer
* memory pointers. These are held in dev->priv, in case someone has more
* than one card in a machine.
*/
static int __init eexp_hw_probe(struct net_device *dev, unsigned short ioaddr)
{
unsigned short hw_addr[3];
unsigned char buswidth;
unsigned int memory_size;
int i;
unsigned short xsum = 0;
struct net_local *lp = netdev_priv(dev);
printk("%s: EtherExpress 16 at %#x ",dev->name,ioaddr);
outb(ASIC_RST, ioaddr+EEPROM_Ctrl);
outb(0, ioaddr+EEPROM_Ctrl);
udelay(500);
outb(i586_RST, ioaddr+EEPROM_Ctrl);
hw_addr[0] = eexp_hw_readeeprom(ioaddr,2);
hw_addr[1] = eexp_hw_readeeprom(ioaddr,3);
hw_addr[2] = eexp_hw_readeeprom(ioaddr,4);
/* Standard Address or Compaq LTE Address */
if (!((hw_addr[2]==0x00aa && ((hw_addr[1] & 0xff00)==0x0000)) ||
(hw_addr[2]==0x0080 && ((hw_addr[1] & 0xff00)==0x5F00))))
{
printk(" rejected: invalid address %04x%04x%04x\n",
hw_addr[2],hw_addr[1],hw_addr[0]);
return -ENODEV;
}
/* Calculate the EEPROM checksum. Carry on anyway if it's bad,
* though.
*/
for (i = 0; i < 64; i++)
xsum += eexp_hw_readeeprom(ioaddr, i);
if (xsum != 0xbaba)
printk(" (bad EEPROM xsum 0x%02x)", xsum);
dev->base_addr = ioaddr;
for ( i=0 ; i<6 ; i++ )
dev->dev_addr[i] = ((unsigned char *)hw_addr)[5-i];
{
static char irqmap[]={0, 9, 3, 4, 5, 10, 11, 0};
unsigned short setupval = eexp_hw_readeeprom(ioaddr,0);
/* Use the IRQ from EEPROM if none was given */
if (!dev->irq)
dev->irq = irqmap[setupval>>13];
if (dev->if_port == 0xff) {
dev->if_port = !(setupval & 0x1000) ? AUI :
eexp_hw_readeeprom(ioaddr,5) & 0x1 ? TPE : BNC;
}
buswidth = !((setupval & 0x400) >> 10);
}
memset(lp, 0, sizeof(struct net_local));
spin_lock_init(&lp->lock);
printk("(IRQ %d, %s connector, %d-bit bus", dev->irq,
eexp_ifmap[dev->if_port], buswidth?8:16);
if (!request_region(dev->base_addr + 0x300e, 1, "EtherExpress"))
return -EBUSY;
eexp_hw_set_interface(dev);
release_region(dev->base_addr + 0x300e, 1);
/* Find out how much RAM we have on the card */
outw(0, dev->base_addr + WRITE_PTR);
for (i = 0; i < 32768; i++)
outw(0, dev->base_addr + DATAPORT);
for (memory_size = 0; memory_size < 64; memory_size++)
{
outw(memory_size<<10, dev->base_addr + READ_PTR);
if (inw(dev->base_addr+DATAPORT))
break;
outw(memory_size<<10, dev->base_addr + WRITE_PTR);
outw(memory_size | 0x5000, dev->base_addr+DATAPORT);
outw(memory_size<<10, dev->base_addr + READ_PTR);
if (inw(dev->base_addr+DATAPORT) != (memory_size | 0x5000))
break;
}
/* Sort out the number of buffers. We may have 16, 32, 48 or 64k
* of RAM to play with.
*/
lp->num_tx_bufs = 4;
lp->rx_buf_end = 0x3ff6;
switch (memory_size)
{
case 64:
lp->rx_buf_end += 0x4000;
case 48:
lp->num_tx_bufs += 4;
lp->rx_buf_end += 0x4000;
case 32:
lp->rx_buf_end += 0x4000;
case 16:
printk(", %dk RAM)\n", memory_size);
break;
default:
printk(") bad memory size (%dk).\n", memory_size);
return -ENODEV;
break;
}
lp->rx_buf_start = TX_BUF_START + (lp->num_tx_bufs*TX_BUF_SIZE);
lp->width = buswidth;
dev->open = eexp_open;
dev->stop = eexp_close;
dev->hard_start_xmit = eexp_xmit;
dev->set_multicast_list = &eexp_set_multicast;
dev->tx_timeout = eexp_timeout;
dev->watchdog_timeo = 2*HZ;
return register_netdev(dev);
}
/*
* Read a word from the EtherExpress on-board serial EEPROM.
* The EEPROM contains 64 words of 16 bits.
*/
static unsigned short __init eexp_hw_readeeprom(unsigned short ioaddr,
unsigned char location)
{
unsigned short cmd = 0x180|(location&0x7f);
unsigned short rval = 0,wval = EC_CS|i586_RST;
int i;
outb(EC_CS|i586_RST,ioaddr+EEPROM_Ctrl);
for (i=0x100 ; i ; i>>=1 )
{
if (cmd&i)
wval |= EC_Wr;
else
wval &= ~EC_Wr;
outb(wval,ioaddr+EEPROM_Ctrl);
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
}
wval &= ~EC_Wr;
outb(wval,ioaddr+EEPROM_Ctrl);
for (i=0x8000 ; i ; i>>=1 )
{
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
if (inb(ioaddr+EEPROM_Ctrl)&EC_Rd)
rval |= i;
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
}
wval &= ~EC_CS;
outb(wval|EC_Clk,ioaddr+EEPROM_Ctrl);
eeprom_delay();
outb(wval,ioaddr+EEPROM_Ctrl);
eeprom_delay();
return rval;
}
/*
* Reap tx buffers and return last transmit status.
* if ==0 then either:
* a) we're not transmitting anything, so why are we here?
* b) we've died.
* otherwise, Stat_Busy(return) means we've still got some packets
* to transmit, Stat_Done(return) means our buffers should be empty
* again
*/
static unsigned short eexp_hw_lasttxstat(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short tx_block = lp->tx_reap;
unsigned short status;
if (!netif_queue_stopped(dev) && lp->tx_head==lp->tx_reap)
return 0x0000;
do
{
outw(tx_block & ~31, dev->base_addr + SM_PTR);
status = inw(dev->base_addr + SHADOW(tx_block));
if (!Stat_Done(status))
{
lp->tx_link = tx_block;
return status;
}
else
{
lp->last_tx_restart = 0;
dev->stats.collisions += Stat_NoColl(status);
if (!Stat_OK(status))
{
char *whatsup = NULL;
dev->stats.tx_errors++;
if (Stat_Abort(status))
dev->stats.tx_aborted_errors++;
if (Stat_TNoCar(status)) {
whatsup = "aborted, no carrier";
dev->stats.tx_carrier_errors++;
}
if (Stat_TNoCTS(status)) {
whatsup = "aborted, lost CTS";
dev->stats.tx_carrier_errors++;
}
if (Stat_TNoDMA(status)) {
whatsup = "FIFO underran";
dev->stats.tx_fifo_errors++;
}
if (Stat_TXColl(status)) {
whatsup = "aborted, too many collisions";
dev->stats.tx_aborted_errors++;
}
if (whatsup)
printk(KERN_INFO "%s: transmit %s\n",
dev->name, whatsup);
}
else
dev->stats.tx_packets++;
}
if (tx_block == TX_BUF_START+((lp->num_tx_bufs-1)*TX_BUF_SIZE))
lp->tx_reap = tx_block = TX_BUF_START;
else
lp->tx_reap = tx_block += TX_BUF_SIZE;
netif_wake_queue(dev);
}
while (lp->tx_reap != lp->tx_head);
lp->tx_link = lp->tx_tail + 0x08;
return status;
}
/*
* This should never happen. It is called when some higher routine detects
* that the CU has stopped, to try to restart it from the last packet we knew
* we were working on, or the idle loop if we had finished for the time.
*/
static void eexp_hw_txrestart(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short ioaddr = dev->base_addr;
lp->last_tx_restart = lp->tx_link;
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
{
unsigned short boguscount=50,failcount=5;
while (!scb_status(dev))
{
if (!--boguscount)
{
if (--failcount)
{
printk(KERN_WARNING "%s: CU start timed out, status %04x, cmd %04x\n", dev->name, scb_status(dev), scb_rdcmd(dev));
scb_wrcbl(dev, lp->tx_link);
scb_command(dev, SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
boguscount = 100;
}
else
{
printk(KERN_WARNING "%s: Failed to restart CU, resetting board...\n",dev->name);
eexp_hw_init586(dev);
netif_wake_queue(dev);
return;
}
}
}
}
}
/*
* Writes down the list of transmit buffers into card memory. Each
* entry consists of an 82586 transmit command, followed by a jump
* pointing to itself. When we want to transmit a packet, we write
* the data into the appropriate transmit buffer and then modify the
* preceding jump to point at the new transmit command. This means that
* the 586 command unit is continuously active.
*/
static void eexp_hw_txinit(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short tx_block = TX_BUF_START;
unsigned short curtbuf;
unsigned short ioaddr = dev->base_addr;
for ( curtbuf=0 ; curtbuf<lp->num_tx_bufs ; curtbuf++ )
{
outw(tx_block, ioaddr + WRITE_PTR);
outw(0x0000, ioaddr + DATAPORT);
outw(Cmd_INT|Cmd_Xmit, ioaddr + DATAPORT);
outw(tx_block+0x08, ioaddr + DATAPORT);
outw(tx_block+0x0e, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
outw(tx_block+0x08, ioaddr + DATAPORT);
outw(0x8000, ioaddr + DATAPORT);
outw(-1, ioaddr + DATAPORT);
outw(tx_block+0x16, ioaddr + DATAPORT);
outw(0x0000, ioaddr + DATAPORT);
tx_block += TX_BUF_SIZE;
}
lp->tx_head = TX_BUF_START;
lp->tx_reap = TX_BUF_START;
lp->tx_tail = tx_block - TX_BUF_SIZE;
lp->tx_link = lp->tx_tail + 0x08;
lp->rx_buf_start = tx_block;
}
/*
* Write the circular list of receive buffer descriptors to card memory.
* The end of the list isn't marked, which means that the 82586 receive
* unit will loop until buffers become available (this avoids it giving us
* "out of resources" messages).
*/
static void eexp_hw_rxinit(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short rx_block = lp->rx_buf_start;
unsigned short ioaddr = dev->base_addr;
lp->num_rx_bufs = 0;
lp->rx_first = lp->rx_ptr = rx_block;
do
{
lp->num_rx_bufs++;
outw(rx_block, ioaddr + WRITE_PTR);
outw(0, ioaddr + DATAPORT); outw(0, ioaddr+DATAPORT);
outw(rx_block + RX_BUF_SIZE, ioaddr+DATAPORT);
outw(0xffff, ioaddr+DATAPORT);
outw(0x0000, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0xdead, ioaddr+DATAPORT);
outw(0x0000, ioaddr+DATAPORT);
outw(rx_block + RX_BUF_SIZE + 0x16, ioaddr+DATAPORT);
outw(rx_block + 0x20, ioaddr+DATAPORT);
outw(0, ioaddr+DATAPORT);
outw(RX_BUF_SIZE-0x20, ioaddr+DATAPORT);
lp->rx_last = rx_block;
rx_block += RX_BUF_SIZE;
} while (rx_block <= lp->rx_buf_end-RX_BUF_SIZE);
/* Make first Rx frame descriptor point to first Rx buffer
descriptor */
outw(lp->rx_first + 6, ioaddr+WRITE_PTR);
outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
/* Close Rx frame descriptor ring */
outw(lp->rx_last + 4, ioaddr+WRITE_PTR);
outw(lp->rx_first, ioaddr+DATAPORT);
/* Close Rx buffer descriptor ring */
outw(lp->rx_last + 0x16 + 2, ioaddr+WRITE_PTR);
outw(lp->rx_first + 0x16, ioaddr+DATAPORT);
}
/*
* Un-reset the 586, and start the configuration sequence. We don't wait for
* this to finish, but allow the interrupt handler to start the CU and RU for
* us. We can't start the receive/transmission system up before we know that
* the hardware is configured correctly.
*/
static void eexp_hw_init586(struct net_device *dev)
{
struct net_local *lp = netdev_priv(dev);
unsigned short ioaddr = dev->base_addr;
int i;
#if NET_DEBUG > 6
printk("%s: eexp_hw_init586()\n", dev->name);
#endif
lp->started = 0;
set_loopback(dev);
outb(SIRQ_dis|irqrmap[dev->irq],ioaddr+SET_IRQ);
/* Download the startup code */
outw(lp->rx_buf_end & ~31, ioaddr + SM_PTR);
outw(lp->width?0x0001:0x0000, ioaddr + 0x8006);
outw(0x0000, ioaddr + 0x8008);
outw(0x0000, ioaddr + 0x800a);
outw(0x0000, ioaddr + 0x800c);
outw(0x0000, ioaddr + 0x800e);
for (i = 0; i < (sizeof(start_code)); i+=32) {
int j;
outw(i, ioaddr + SM_PTR);
for (j = 0; j < 16; j+=2)
outw(start_code[(i+j)/2],
ioaddr+0x4000+j);
for (j = 0; j < 16; j+=2)
outw(start_code[(i+j+16)/2],
ioaddr+0x8000+j);
}
/* Do we want promiscuous mode or multicast? */
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
i = inw(ioaddr+SHADOW(CONF_PROMISC));
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
ioaddr+SHADOW(CONF_PROMISC));
lp->was_promisc = dev->flags & IFF_PROMISC;
#if 0
eexp_setup_filter(dev);
#endif
/* Write our hardware address */
outw(CONF_HWADDR & ~31, ioaddr+SM_PTR);
outw(((unsigned short *)dev->dev_addr)[0], ioaddr+SHADOW(CONF_HWADDR));
outw(((unsigned short *)dev->dev_addr)[1],
ioaddr+SHADOW(CONF_HWADDR+2));
outw(((unsigned short *)dev->dev_addr)[2],
ioaddr+SHADOW(CONF_HWADDR+4));
eexp_hw_txinit(dev);
eexp_hw_rxinit(dev);
outb(0,ioaddr+EEPROM_Ctrl);
mdelay(5);
scb_command(dev, 0xf000);
outb(0,ioaddr+SIGNAL_CA);
outw(0, ioaddr+SM_PTR);
{
unsigned short rboguscount=50,rfailcount=5;
while (inw(ioaddr+0x4000))
{
if (!--rboguscount)
{
printk(KERN_WARNING "%s: i82586 reset timed out, kicking...\n",
dev->name);
scb_command(dev, 0);
outb(0,ioaddr+SIGNAL_CA);
rboguscount = 100;
if (!--rfailcount)
{
printk(KERN_WARNING "%s: i82586 not responding, giving up.\n",
dev->name);
return;
}
}
}
}
scb_wrcbl(dev, CONF_LINK);
scb_command(dev, 0xf000|SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
{
unsigned short iboguscount=50,ifailcount=5;
while (!scb_status(dev))
{
if (!--iboguscount)
{
if (--ifailcount)
{
printk(KERN_WARNING "%s: i82586 initialization timed out, status %04x, cmd %04x\n",
dev->name, scb_status(dev), scb_rdcmd(dev));
scb_wrcbl(dev, CONF_LINK);
scb_command(dev, 0xf000|SCB_CUstart);
outb(0,ioaddr+SIGNAL_CA);
iboguscount = 100;
}
else
{
printk(KERN_WARNING "%s: Failed to initialize i82586, giving up.\n",dev->name);
return;
}
}
}
}
clear_loopback(dev);
outb(SIRQ_en|irqrmap[dev->irq],ioaddr+SET_IRQ);
lp->init_time = jiffies;
#if NET_DEBUG > 6
printk("%s: leaving eexp_hw_init586()\n", dev->name);
#endif
return;
}
static void eexp_setup_filter(struct net_device *dev)
{
struct dev_mc_list *dmi;
unsigned short ioaddr = dev->base_addr;
int count = dev->mc_count;
int i;
if (count > 8) {
printk(KERN_INFO "%s: too many multicast addresses (%d)\n",
dev->name, count);
count = 8;
}
outw(CONF_NR_MULTICAST & ~31, ioaddr+SM_PTR);
outw(6*count, ioaddr+SHADOW(CONF_NR_MULTICAST));
for (i = 0, dmi = dev->mc_list; i < count; i++, dmi = dmi->next) {
unsigned short *data;
if (!dmi) {
printk(KERN_INFO "%s: too few multicast addresses\n", dev->name);
break;
}
if (dmi->dmi_addrlen != ETH_ALEN) {
printk(KERN_INFO "%s: invalid multicast address length given.\n", dev->name);
continue;
}
data = (unsigned short *)dmi->dmi_addr;
outw((CONF_MULTICAST+(6*i)) & ~31, ioaddr+SM_PTR);
outw(data[0], ioaddr+SHADOW(CONF_MULTICAST+(6*i)));
outw((CONF_MULTICAST+(6*i)+2) & ~31, ioaddr+SM_PTR);
outw(data[1], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+2));
outw((CONF_MULTICAST+(6*i)+4) & ~31, ioaddr+SM_PTR);
outw(data[2], ioaddr+SHADOW(CONF_MULTICAST+(6*i)+4));
}
}
/*
* Set or clear the multicast filter for this adaptor.
*/
static void
eexp_set_multicast(struct net_device *dev)
{
unsigned short ioaddr = dev->base_addr;
struct net_local *lp = netdev_priv(dev);
int kick = 0, i;
if ((dev->flags & IFF_PROMISC) != lp->was_promisc) {
outw(CONF_PROMISC & ~31, ioaddr+SM_PTR);
i = inw(ioaddr+SHADOW(CONF_PROMISC));
outw((dev->flags & IFF_PROMISC)?(i|1):(i & ~1),
ioaddr+SHADOW(CONF_PROMISC));
lp->was_promisc = dev->flags & IFF_PROMISC;
kick = 1;
}
if (!(dev->flags & IFF_PROMISC)) {
eexp_setup_filter(dev);
if (lp->old_mc_count != dev->mc_count) {
kick = 1;
lp->old_mc_count = dev->mc_count;
}
}
if (kick) {
unsigned long oj;
scb_command(dev, SCB_CUsuspend);
outb(0, ioaddr+SIGNAL_CA);
outb(0, ioaddr+SIGNAL_CA);
#if 0
printk("%s: waiting for CU to go suspended\n", dev->name);
#endif
oj = jiffies;
while ((SCB_CUstat(scb_status(dev)) == 2) &&
(time_before(jiffies, oj + 2000)));
if (SCB_CUstat(scb_status(dev)) == 2)
printk("%s: warning, CU didn't stop\n", dev->name);
lp->started &= ~(STARTED_CU);
scb_wrcbl(dev, CONF_LINK);
scb_command(dev, SCB_CUstart);
outb(0, ioaddr+SIGNAL_CA);
}
}
/*
* MODULE stuff
*/
#ifdef MODULE
#define EEXP_MAX_CARDS 4 /* max number of cards to support */
static struct net_device *dev_eexp[EEXP_MAX_CARDS];
static int irq[EEXP_MAX_CARDS];
static int io[EEXP_MAX_CARDS];
module_param_array(io, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
MODULE_PARM_DESC(io, "EtherExpress 16 I/O base address(es)");
MODULE_PARM_DESC(irq, "EtherExpress 16 IRQ number(s)");
MODULE_LICENSE("GPL");
/* Ideally the user would give us io=, irq= for every card. If any parameters
* are specified, we verify and then use them. If no parameters are given, we
* autoprobe for one card only.
*/
int __init init_module(void)
{
struct net_device *dev;
int this_dev, found = 0;
for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
dev = alloc_etherdev(sizeof(struct net_local));
dev->irq = irq[this_dev];
dev->base_addr = io[this_dev];
if (io[this_dev] == 0) {
if (this_dev)
break;
printk(KERN_NOTICE "eexpress.c: Module autoprobe not recommended, give io=xx.\n");
}
if (do_express_probe(dev) == 0) {
dev_eexp[this_dev] = dev;
found++;
continue;
}
printk(KERN_WARNING "eexpress.c: Failed to register card at 0x%x.\n", io[this_dev]);
free_netdev(dev);
break;
}
if (found)
return 0;
return -ENXIO;
}
void __exit cleanup_module(void)
{
int this_dev;
for (this_dev = 0; this_dev < EEXP_MAX_CARDS; this_dev++) {
struct net_device *dev = dev_eexp[this_dev];
if (dev) {
unregister_netdev(dev);
free_netdev(dev);
}
}
}
#endif
/*
* Local Variables:
* c-file-style: "linux"
* tab-width: 8
* End:
*/
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