// SPDX-License-Identifier: GPL-2.0-only
/*
* linux / drivers / acorn / net / ether3 . c
*
* Copyright ( C ) 1995 - 2000 Russell King
*
* SEEQ nq8005 ethernet driver for Acorn / ANT Ether3 card
* for Acorn machines
*
* By Russell King , with some suggestions from borris @ ant . co . uk
*
* Changelog :
* 1 . 04 RMK 29 / 02 / 1996 Won ' t pass packets that are from our ethernet
* address up to the higher levels - they ' re
* silently ignored . I / F can now be put into
* multicast mode . Receiver routine optimised .
* 1 . 05 RMK 30 / 02 / 1996 Now claims interrupt at open when part of
* the kernel rather than when a module .
* 1 . 06 RMK 02 / 03 / 1996 Various code cleanups
* 1 . 07 RMK 13 / 10 / 1996 Optimised interrupt routine and transmit
* routines .
* 1 . 08 RMK 14 / 10 / 1996 Fixed problem with too many packets ,
* prevented the kernel message about dropped
* packets appearing too many times a second .
* Now does not disable all IRQs , only the IRQ
* used by this card .
* 1 . 09 RMK 10 / 11 / 1996 Only enables TX irq when buffer space is low ,
* but we still service the TX queue if we get a
* RX interrupt .
* 1 . 10 RMK 15 / 07 / 1997 Fixed autoprobing of NQ8004 .
* 1 . 11 RMK 16 / 11 / 1997 Fixed autoprobing of NQ8005A .
* 1 . 12 RMK 31 / 12 / 1997 Removed reference to dev_tint for Linux 2 . 1 .
* RMK 27 / 06 / 1998 Changed asm / delay . h to linux / delay . h .
* 1 . 13 RMK 29 / 06 / 1998 Fixed problem with transmission of packets .
* Chip seems to have a bug in , whereby if the
* packet starts two bytes from the end of the
* buffer , it corrupts the receiver chain , and
* never updates the transmit status correctly .
* 1 . 14 RMK 07 / 01 / 1998 Added initial code for ETHERB addressing .
* 1 . 15 RMK 30 / 04 / 1999 More fixes to the transmit routine for buggy
* hardware .
* 1 . 16 RMK 10 / 02 / 2000 Updated for 2 . 3 . 43
* 1 . 17 RMK 13 / 05 / 2000 Updated for 2 . 3 . 99 - pre8
*/
#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/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <asm /ecard.h>
#include <asm /io.h>
static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n" ;
#include "ether3.h"
static unsigned int net_debug = NET_DEBUG;
static void ether3_setmulticastlist(struct net_device *dev);
static int ether3_rx(struct net_device *dev, unsigned int maxcnt);
static void ether3_tx(struct net_device *dev);
static int ether3_open (struct net_device *dev);
static netdev_tx_t ether3_sendpacket(struct sk_buff *skb,
struct net_device *dev);
static irqreturn_t ether3_interrupt (int irq, void *dev_id);
static int ether3_close (struct net_device *dev);
static void ether3_setmulticastlist (struct net_device *dev);
static void ether3_timeout(struct net_device *dev, unsigned int txqueue);
#define BUS_16 2
#define BUS_8 1
#define BUS_UNKNOWN 0
/* --------------------------------------------------------------------------- */
typedef enum {
buffer_write,
buffer_read
} buffer_rw_t;
/*
* ether3 read / write . Slow things down a bit . . .
* The SEEQ8005 doesn ' t like us writing to its registers
* too quickly .
*/
static inline void ether3_outb(int v, void __iomem *r)
{
writeb(v, r);
udelay(1 );
}
static inline void ether3_outw(int v, void __iomem *r)
{
writew(v, r);
udelay(1 );
}
#define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1 ); __v; })
#define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1 ); __v; })
static int
ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
{
int timeout = 1000 ;
ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0 ) {
if (!timeout--) {
printk("%s: setbuffer broken\n" , dev->name);
priv(dev)->broken = 1 ;
return 1 ;
}
udelay(1 );
}
if (read == buffer_read) {
ether3_outw(start, REG_DMAADDR);
ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND);
} else {
ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND);
ether3_outw(start, REG_DMAADDR);
}
return 0 ;
}
/*
* write data to the buffer memory
*/
#define ether3_writebuffer(dev,data,length) \
writesw(REG_BUFWIN, (data), (length) >> 1 )
#define ether3_writeword(dev,data) \
writew((data), REG_BUFWIN)
#define ether3_writelong(dev,data) { \
void __iomem *reg_bufwin = REG_BUFWIN; \
writew((data), reg_bufwin); \
writew((data) >> 16 , reg_bufwin); \
}
/*
* read data from the buffer memory
*/
#define ether3_readbuffer(dev,data,length) \
readsw(REG_BUFWIN, (data), (length) >> 1 )
#define ether3_readword(dev) \
readw(REG_BUFWIN)
#define ether3_readlong(dev) \
readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16 )
/*
* Switch LED off . . .
*/
static void ether3_ledoff(struct timer_list *t)
{
struct dev_priv *private = timer_container_of(private , t, timer);
struct net_device *dev = private ->dev;
ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
}
/*
* switch LED on . . .
*/
static inline void ether3_ledon(struct net_device *dev)
{
timer_delete(&priv(dev)->timer);
priv(dev)->timer.expires = jiffies + HZ / 50 ; /* leave on for 1/50th second */
add_timer(&priv(dev)->timer);
if (priv(dev)->regs.config2 & CFG2_CTRLO)
ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
}
/*
* Read the ethernet address string from the on board rom .
* This is an ascii string ! ! !
*/
static int
ether3_addr(char *addr, struct expansion_card *ec)
{
struct in_chunk_dir cd;
char *s;
if (ecard_readchunk(&cd, ec, 0 xf5, 0 ) && (s = strchr(cd.d.string, '(' ))) {
int i;
for (i = 0 ; i<6 ; i++) {
addr[i] = simple_strtoul(s + 1 , &s, 0 x10);
if (*s != (i==5 ?')' : ':' ))
break ;
}
if (i == 6 )
return 0 ;
}
/* I wonder if we should even let the user continue in this case
* - no , it would be better to disable the device
*/
printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n" );
return -ENODEV;
}
/* --------------------------------------------------------------------------- */
static int
ether3_ramtest(struct net_device *dev, unsigned char byte)
{
unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL);
int i,ret = 0 ;
int max_errors = 4 ;
int bad = -1 ;
if (!buffer)
return 1 ;
memset(buffer, byte, RX_END);
ether3_setbuffer(dev, buffer_write, 0 );
ether3_writebuffer(dev, buffer, TX_END);
ether3_setbuffer(dev, buffer_write, RX_START);
ether3_writebuffer(dev, buffer + RX_START, RX_LEN);
memset(buffer, byte ^ 0 xff, RX_END);
ether3_setbuffer(dev, buffer_read, 0 );
ether3_readbuffer(dev, buffer, TX_END);
ether3_setbuffer(dev, buffer_read, RX_START);
ether3_readbuffer(dev, buffer + RX_START, RX_LEN);
for (i = 0 ; i < RX_END; i++) {
if (buffer[i] != byte) {
if (max_errors > 0 && bad != buffer[i]) {
printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X" ,
dev->name, buffer[i], byte, i);
ret = 2 ;
max_errors--;
bad = i;
}
} else {
if (bad != -1 ) {
if (bad != i - 1 )
printk(" - 0x%04X\n" , i - 1 );
printk("\n" );
bad = -1 ;
}
}
}
if (bad != -1 )
printk(" - 0xffff\n" );
kfree(buffer);
return ret;
}
/* ------------------------------------------------------------------------------- */
static int ether3_init_2(struct net_device *dev)
{
int i;
priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
priv(dev)->regs.command = 0 ;
/*
* Set up our hardware address
*/
ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
for (i = 0 ; i < 6 ; i++)
ether3_outb(dev->dev_addr[i], REG_BUFWIN);
if (dev->flags & IFF_PROMISC)
priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
else if (dev->flags & IFF_MULTICAST)
priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
else
priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
/*
* There is a problem with the NQ8005 in that it occasionally loses the
* last two bytes . To get round this problem , we receive the CRC as
* well . That way , if we do lose the last two , then it doesn ' t matter .
*/
ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
ether3_outw((TX_END>>8 ) - 1 , REG_BUFWIN);
ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
ether3_outw(0 , REG_TRANSMITPTR);
ether3_outw(priv(dev)->rx_head >> 8 , REG_RECVEND);
ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
ether3_outw(priv(dev)->regs.command, REG_COMMAND);
i = ether3_ramtest(dev, 0 x5A);
if (i)
return i;
i = ether3_ramtest(dev, 0 x1E);
if (i)
return i;
ether3_setbuffer(dev, buffer_write, 0 );
ether3_writelong(dev, 0 );
return 0 ;
}
static void
ether3_init_for_open(struct net_device *dev)
{
int i;
/* Reset the chip */
ether3_outw(CFG2_RESET, REG_CONFIG2);
udelay(4 );
priv(dev)->regs.command = 0 ;
ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
barrier();
ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
for (i = 0 ; i < 6 ; i++)
ether3_outb(dev->dev_addr[i], REG_BUFWIN);
priv(dev)->tx_head = 0 ;
priv(dev)->tx_tail = 0 ;
priv(dev)->regs.config2 |= CFG2_CTRLO;
priv(dev)->rx_head = RX_START;
ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
ether3_outw((TX_END>>8 ) - 1 , REG_BUFWIN);
ether3_outw(priv(dev)->rx_head, REG_RECVPTR);
ether3_outw(priv(dev)->rx_head >> 8 , REG_RECVEND);
ether3_outw(0 , REG_TRANSMITPTR);
ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
ether3_setbuffer(dev, buffer_write, 0 );
ether3_writelong(dev, 0 );
priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX;
ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
}
static inline int
ether3_probe_bus_8(struct net_device *dev, int val)
{
int write_low, write_high, read_low, read_high;
write_low = val & 255 ;
write_high = val >> 8 ;
printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]" , write_high, write_low);
ether3_outb(write_low, REG_RECVPTR);
ether3_outb(write_high, REG_RECVPTR + 4 );
read_low = ether3_inb(REG_RECVPTR);
read_high = ether3_inb(REG_RECVPTR + 4 );
printk(", read8 [%02X:%02X]\n" , read_high, read_low);
return read_low == write_low && read_high == write_high;
}
static inline int
ether3_probe_bus_16(struct net_device *dev, int val)
{
int read_val;
ether3_outw(val, REG_RECVPTR);
read_val = ether3_inw(REG_RECVPTR);
printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n" , val, read_val);
return read_val == val;
}
/*
* Open / initialize the board . This is called ( in the current kernel )
* sometime after booting when the ' ifconfig ' program is run .
*
* This routine should set everything up anew at each open , even
* registers that " should " only need to be set once at boot , so that
* there is non - reboot way to recover if something goes wrong .
*/
static int
ether3_open(struct net_device *dev)
{
if (request_irq(dev->irq, ether3_interrupt, 0 , "ether3" , dev))
return -EAGAIN;
ether3_init_for_open(dev);
netif_start_queue(dev);
return 0 ;
}
/*
* The inverse routine to ether3_open ( ) .
*/
static int
ether3_close(struct net_device *dev)
{
netif_stop_queue(dev);
disable_irq(dev->irq);
ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
priv(dev)->regs.command = 0 ;
while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON))
barrier();
ether3_outb(0 x80, REG_CONFIG2 + 4 );
ether3_outw(0 , REG_COMMAND);
free_irq(dev->irq, dev);
return 0 ;
}
/*
* Set or clear promiscuous / multicast mode filter for this adaptor .
*
* We don ' t attempt any packet filtering . The card may have a SEEQ 8004
* in which does not have the other ethernet address registers present . . .
*/
static void ether3_setmulticastlist(struct net_device *dev)
{
priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC;
if (dev->flags & IFF_PROMISC) {
/* promiscuous mode */
priv(dev)->regs.config1 |= CFG1_RECVPROMISC;
} else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) {
priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI;
} else
priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD;
ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
}
static void ether3_timeout(struct net_device *dev, unsigned int txqueue)
{
unsigned long flags;
timer_delete(&priv(dev)->timer);
local_irq_save(flags);
printk(KERN_ERR "%s: transmit timed out, network cable problem?\n" , dev->name);
printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n" , dev->name,
ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2));
printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n" , dev->name,
ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR));
printk(KERN_ERR "%s: tx head=%X tx tail=%X\n" , dev->name,
priv(dev)->tx_head, priv(dev)->tx_tail);
ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail);
printk(KERN_ERR "%s: packet status = %08X\n" , dev->name, ether3_readlong(dev));
local_irq_restore(flags);
priv(dev)->regs.config2 |= CFG2_CTRLO;
dev->stats.tx_errors += 1 ;
ether3_outw(priv(dev)->regs.config2, REG_CONFIG2);
priv(dev)->tx_head = priv(dev)->tx_tail = 0 ;
netif_wake_queue(dev);
}
/*
* Transmit a packet
*/
static netdev_tx_t
ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
{
unsigned long flags;
unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
unsigned int ptr, next_ptr;
if (priv(dev)->broken) {
dev_kfree_skb(skb);
dev->stats.tx_dropped++;
netif_start_queue(dev);
return NETDEV_TX_OK;
}
length = (length + 1 ) & ~1 ;
if (length != skb->len) {
if (skb_padto(skb, length))
goto out;
}
next_ptr = (priv(dev)->tx_head + 1 ) & 15 ;
local_irq_save(flags);
if (priv(dev)->tx_tail == next_ptr) {
local_irq_restore(flags);
return NETDEV_TX_BUSY; /* unable to queue */
}
ptr = 0 x600 * priv(dev)->tx_head;
priv(dev)->tx_head = next_ptr;
next_ptr *= 0 x600;
#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS)
ether3_setbuffer(dev, buffer_write, next_ptr);
ether3_writelong(dev, 0 );
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writelong(dev, 0 );
ether3_writebuffer(dev, skb->data, length);
ether3_writeword(dev, htons(next_ptr));
ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16 );
ether3_setbuffer(dev, buffer_write, ptr);
ether3_writeword(dev, htons((ptr + length + 4 )));
ether3_writeword(dev, TXHDR_FLAGS >> 16 );
ether3_ledon(dev);
if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
ether3_outw(ptr, REG_TRANSMITPTR);
ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND);
}
next_ptr = (priv(dev)->tx_head + 1 ) & 15 ;
local_irq_restore(flags);
dev_kfree_skb(skb);
if (priv(dev)->tx_tail == next_ptr)
netif_stop_queue(dev);
out:
return NETDEV_TX_OK;
}
static irqreturn_t
ether3_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
unsigned int status, handled = IRQ_NONE;
#if NET_DEBUG > 1
if (net_debug & DEBUG_INT)
printk("eth3irq: %d " , irq);
#endif
status = ether3_inw(REG_STATUS);
if (status & STAT_INTRX) {
ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND);
ether3_rx(dev, 12 );
handled = IRQ_HANDLED;
}
if (status & STAT_INTTX) {
ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND);
ether3_tx(dev);
handled = IRQ_HANDLED;
}
#if NET_DEBUG > 1
if (net_debug & DEBUG_INT)
printk("done\n" );
#endif
return handled;
}
/*
* If we have a good packet ( s ) , get it / them out of the buffers .
*/
static int ether3_rx(struct net_device *dev, unsigned int maxcnt)
{
unsigned int next_ptr = priv(dev)->rx_head, received = 0 ;
ether3_ledon(dev);
do {
unsigned int this_ptr, status;
unsigned char addrs[16 ];
/*
* read the first 16 bytes from the buffer .
* This contains the status bytes etc and ethernet addresses ,
* and we also check the source ethernet address to see if
* it originated from us .
*/
{
unsigned int temp_ptr;
ether3_setbuffer(dev, buffer_read, next_ptr);
temp_ptr = ether3_readword(dev);
status = ether3_readword(dev);
if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) !=
(RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr)
break ;
this_ptr = next_ptr + 4 ;
next_ptr = ntohs(temp_ptr);
}
ether3_setbuffer(dev, buffer_read, this_ptr);
ether3_readbuffer(dev, addrs+2 , 12 );
if (next_ptr < RX_START || next_ptr >= RX_END) {
printk("%s: bad next pointer @%04X: " , dev->name, priv(dev)->rx_head);
printk("%02X %02X %02X %02X " , next_ptr >> 8 , next_ptr & 255 , status & 255 , status >> 8 );
printk("%pM %pM\n" , addrs + 2 , addrs + 8 );
next_ptr = priv(dev)->rx_head;
break ;
}
/*
* ignore our own packets . . .
*/
if (!(*(unsigned long *)&dev->dev_addr[0 ] ^ *(unsigned long *)&addrs[2 +6 ]) &&
!(*(unsigned short *)&dev->dev_addr[4 ] ^ *(unsigned short *)&addrs[2 +10 ])) {
maxcnt ++; /* compensate for loopedback packet */
ether3_outw(next_ptr >> 8 , REG_RECVEND);
} else
if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) {
unsigned int length = next_ptr - this_ptr;
struct sk_buff *skb;
if (next_ptr <= this_ptr)
length += RX_END - RX_START;
skb = netdev_alloc_skb(dev, length + 2 );
if (skb) {
unsigned char *buf;
skb_reserve(skb, 2 );
buf = skb_put(skb, length);
ether3_readbuffer(dev, buf + 12 , length - 12 );
ether3_outw(next_ptr >> 8 , REG_RECVEND);
*(unsigned short *)(buf + 0 ) = *(unsigned short *)(addrs + 2 );
*(unsigned long *)(buf + 2 ) = *(unsigned long *)(addrs + 4 );
*(unsigned long *)(buf + 6 ) = *(unsigned long *)(addrs + 8 );
*(unsigned short *)(buf + 10 ) = *(unsigned short *)(addrs + 12 );
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
received ++;
} else {
ether3_outw(next_ptr >> 8 , REG_RECVEND);
dev->stats.rx_dropped++;
goto done;
}
} else {
struct net_device_stats *stats = &dev->stats;
ether3_outw(next_ptr >> 8 , REG_RECVEND);
if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++;
if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++;
if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++;
if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++;
stats->rx_errors++;
}
}
while (-- maxcnt);
done:
dev->stats.rx_packets += received;
priv(dev)->rx_head = next_ptr;
/*
* If rx went off line , then that means that the buffer may be full . We
* have dropped at least one packet .
*/
if (!(ether3_inw(REG_STATUS) & STAT_RXON)) {
dev->stats.rx_dropped++;
ether3_outw(next_ptr, REG_RECVPTR);
ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND);
}
return maxcnt;
}
/*
* Update stats for the transmitted packet ( s )
*/
static void ether3_tx(struct net_device *dev)
{
unsigned int tx_tail = priv(dev)->tx_tail;
int max_work = 14 ;
do {
unsigned long status;
/*
* Read the packet header
*/
ether3_setbuffer(dev, buffer_read, tx_tail * 0 x600);
status = ether3_readlong(dev);
/*
* Check to see if this packet has been transmitted
*/
if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) !=
(TXSTAT_DONE | TXHDR_TRANSMIT))
break ;
/*
* Update errors
*/
if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS)))
dev->stats.tx_packets++;
else {
dev->stats.tx_errors++;
if (status & TXSTAT_16COLLISIONS)
dev->stats.collisions += 16 ;
if (status & TXSTAT_BABBLED)
dev->stats.tx_fifo_errors++;
}
tx_tail = (tx_tail + 1 ) & 15 ;
} while (--max_work);
if (priv(dev)->tx_tail != tx_tail) {
priv(dev)->tx_tail = tx_tail;
netif_wake_queue(dev);
}
}
static void ether3_banner(void )
{
static unsigned version_printed = 0 ;
if (net_debug && version_printed++ == 0 )
printk(KERN_INFO "%s" , version);
}
static const struct net_device_ops ether3_netdev_ops = {
.ndo_open = ether3_open,
.ndo_stop = ether3_close,
.ndo_start_xmit = ether3_sendpacket,
.ndo_set_rx_mode = ether3_setmulticastlist,
.ndo_tx_timeout = ether3_timeout,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
};
static int
ether3_probe(struct expansion_card *ec, const struct ecard_id *id)
{
const struct ether3_data *data = id->data;
struct net_device *dev;
int bus_type, ret;
u8 addr[ETH_ALEN];
ether3_banner();
ret = ecard_request_resources(ec);
if (ret)
goto out;
dev = alloc_etherdev(sizeof (struct dev_priv));
if (!dev) {
ret = -ENOMEM;
goto release;
}
SET_NETDEV_DEV(dev, &ec->dev);
priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0 , 0 );
if (!priv(dev)->base) {
ret = -ENOMEM;
goto free;
}
ec->irqaddr = priv(dev)->base + data->base_offset;
ec->irqmask = 0 xf0;
priv(dev)->seeq = priv(dev)->base + data->base_offset;
dev->irq = ec->irq;
ether3_addr(addr, ec);
eth_hw_addr_set(dev, addr);
priv(dev)->dev = dev;
timer_setup(&priv(dev)->timer, ether3_ledoff, 0 );
/* Reset card...
*/
ether3_outb(0 x80, REG_CONFIG2 + 4 );
bus_type = BUS_UNKNOWN;
udelay(4 );
/* Test using Receive Pointer (16-bit register) to find out
* how the ether3 is connected to the bus . . .
*/
if (ether3_probe_bus_8(dev, 0 x100) &&
ether3_probe_bus_8(dev, 0 x201))
bus_type = BUS_8;
if (bus_type == BUS_UNKNOWN &&
ether3_probe_bus_16(dev, 0 x101) &&
ether3_probe_bus_16(dev, 0 x201))
bus_type = BUS_16;
switch (bus_type) {
case BUS_UNKNOWN:
printk(KERN_ERR "%s: unable to identify bus width\n" , dev->name);
ret = -ENODEV;
goto free;
case BUS_8:
printk(KERN_ERR "%s: %s found, but is an unsupported "
"8-bit card\n" , dev->name, data->name);
ret = -ENODEV;
goto free;
default :
break ;
}
if (ether3_init_2(dev)) {
ret = -ENODEV;
goto free;
}
dev->netdev_ops = ðer3_netdev_ops;
dev->watchdog_timeo = 5 * HZ / 100 ;
ret = register_netdev(dev);
if (ret)
goto free;
printk("%s: %s in slot %d, %pM\n" ,
dev->name, data->name, ec->slot_no, dev->dev_addr);
ecard_set_drvdata(ec, dev);
return 0 ;
free:
free_netdev(dev);
release:
ecard_release_resources(ec);
out:
return ret;
}
static void ether3_remove(struct expansion_card *ec)
{
struct net_device *dev = ecard_get_drvdata(ec);
ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
ecard_set_drvdata(ec, NULL);
unregister_netdev(dev);
timer_delete_sync(&priv(dev)->timer);
free_netdev(dev);
ecard_release_resources(ec);
}
static struct ether3_data ether3 = {
.name = "ether3" ,
.base_offset = 0 ,
};
static struct ether3_data etherb = {
.name = "etherb" ,
.base_offset = 0 x800,
};
static const struct ecard_id ether3_ids[] = {
{ MANU_ANT2, PROD_ANT_ETHER3, ðer3 },
{ MANU_ANT, PROD_ANT_ETHER3, ðer3 },
{ MANU_ANT, PROD_ANT_ETHERB, ðerb },
{ 0 xffff, 0 xffff }
};
static struct ecard_driver ether3_driver = {
.probe = ether3_probe,
.remove = ether3_remove,
.id_table = ether3_ids,
.drv = {
.name = "ether3" ,
},
};
static int __init ether3_init(void )
{
return ecard_register_driver(ðer3_driver);
}
static void __exit ether3_exit(void )
{
ecard_remove_driver(ðer3_driver);
}
module_init(ether3_init);
module_exit(ether3_exit);
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=95 H=90 G=92
¤ Dauer der Verarbeitung: 0.16 Sekunden
(vorverarbeitet am 2026-09-27)
¤
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