ether3.c
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上传日期:2013-04-10
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- /*
- * linux/drivers/acorn/net/ether3.c
- *
- * Copyright (C) 1995-2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * 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/sched.h>
- #include <linux/types.h>
- #include <linux/fcntl.h>
- #include <linux/interrupt.h>
- #include <linux/ptrace.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/init.h>
- #include <linux/delay.h>
- #include <asm/system.h>
- #include <asm/bitops.h>
- #include <asm/ecard.h>
- #include <asm/io.h>
- #include <asm/irq.h>
- static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17n";
- #include "ether3.h"
- static unsigned int net_debug = NET_DEBUG;
- static const card_ids __init ether3_cids[] = {
- { MANU_ANT2, PROD_ANT_ETHER3 },
- { MANU_ANT, PROD_ANT_ETHER3 },
- { MANU_ANT, PROD_ANT_ETHERB },
- { 0xffff, 0xffff }
- };
- static void ether3_setmulticastlist(struct net_device *dev);
- static int ether3_rx(struct net_device *dev, struct dev_priv *priv, unsigned int maxcnt);
- static void ether3_tx(struct net_device *dev, struct dev_priv *priv);
- static int ether3_open (struct net_device *dev);
- static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev);
- static void ether3_interrupt (int irq, void *dev_id, struct pt_regs *regs);
- static int ether3_close (struct net_device *dev);
- static struct net_device_stats *ether3_getstats (struct net_device *dev);
- static void ether3_setmulticastlist (struct net_device *dev);
- static void ether3_timeout(struct net_device *dev);
- #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 it's registers
- * too quickly.
- */
- static inline void ether3_outb(int v, const int r)
- {
- outb(v, r);
- udelay(1);
- }
- static inline void ether3_outw(int v, const int r)
- {
- outw(v, r);
- udelay(1);
- }
- #define ether3_inb(r) ({ unsigned int __v = inb((r)); udelay(1); __v; })
- #define ether3_inw(r) ({ unsigned int __v = inw((r)); udelay(1); __v; })
- static int
- ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- int timeout = 1000;
- ether3_outw(priv->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
- ether3_outw(priv->regs.command | CMD_FIFOWRITE, REG_COMMAND);
- while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) {
- if (!timeout--) {
- printk("%s: setbuffer brokenn", dev->name);
- priv->broken = 1;
- return 1;
- }
- udelay(1);
- }
- if (read == buffer_read) {
- ether3_outw(start, REG_DMAADDR);
- ether3_outw(priv->regs.command | CMD_FIFOREAD, REG_COMMAND);
- } else {
- ether3_outw(priv->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)
- outsw(REG_BUFWIN, (data), (length) >> 1)
- #define ether3_writeword(dev,data)
- outw((data), REG_BUFWIN)
- #define ether3_writelong(dev,data) {
- unsigned long reg_bufwin = REG_BUFWIN;
- outw((data), reg_bufwin);
- outw((data) >> 16, reg_bufwin);
- }
- /*
- * read data from the buffer memory
- */
- #define ether3_readbuffer(dev,data,length)
- insw(REG_BUFWIN, (data), (length) >> 1)
- #define ether3_readword(dev)
- inw(REG_BUFWIN)
- #define ether3_readlong(dev)
- inw(REG_BUFWIN) | (inw(REG_BUFWIN) << 16)
- /*
- * Switch LED off...
- */
- static void
- ether3_ledoff(unsigned long data)
- {
- struct net_device *dev = (struct net_device *)data;
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- ether3_outw(priv->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
- }
- /*
- * switch LED on...
- */
- static inline void
- ether3_ledon(struct net_device *dev, struct dev_priv *priv)
- {
- del_timer(&priv->timer);
- priv->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
- priv->timer.data = (unsigned long)dev;
- priv->timer.function = ether3_ledoff;
- add_timer(&priv->timer);
- if (priv->regs.config2 & CFG2_CTRLO)
- ether3_outw(priv->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2);
- }
- /*
- * Read the ethernet address string from the on board rom.
- * This is an ascii string!!!
- */
- static int __init
- ether3_addr(char *addr, struct expansion_card *ec)
- {
- struct in_chunk_dir cd;
- char *s;
-
- if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) {
- int i;
- for (i = 0; i<6; i++) {
- addr[i] = simple_strtoul(s + 1, &s, 0x10);
- 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 __init
- 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 ^ 0xff, 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%04Xn", i - 1);
- printk("n");
- bad = -1;
- }
- }
- }
- if (bad != -1)
- printk(" - 0xffffn");
- kfree(buffer);
- return ret;
- }
- /* ------------------------------------------------------------------------------- */
- static int __init
- ether3_init_2(struct net_device *dev)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- int i;
- priv->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8;
- priv->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC;
- priv->regs.command = 0;
- /*
- * Set up our hardware address
- */
- ether3_outw(priv->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->regs.config1 |= CFG1_RECVPROMISC;
- else if (dev->flags & IFF_MULTICAST)
- priv->regs.config1 |= CFG1_RECVSPECBRMULTI;
- else
- priv->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 loose the last two, then it doesn't matter.
- */
- ether3_outw(priv->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
- ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
- ether3_outw(priv->rx_head, REG_RECVPTR);
- ether3_outw(0, REG_TRANSMITPTR);
- ether3_outw(priv->rx_head >> 8, REG_RECVEND);
- ether3_outw(priv->regs.config2, REG_CONFIG2);
- ether3_outw(priv->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
- ether3_outw(priv->regs.command, REG_COMMAND);
- i = ether3_ramtest(dev, 0x5A);
- if(i)
- return i;
- i = ether3_ramtest(dev, 0x1E);
- 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)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- int i;
- memset(&priv->stats, 0, sizeof(struct net_device_stats));
- /* Reset the chip */
- ether3_outw(CFG2_RESET, REG_CONFIG2);
- udelay(4);
- priv->regs.command = 0;
- ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
- while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON));
- ether3_outw(priv->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1);
- for (i = 0; i < 6; i++)
- ether3_outb(dev->dev_addr[i], REG_BUFWIN);
- priv->tx_head = 0;
- priv->tx_tail = 0;
- priv->regs.config2 |= CFG2_CTRLO;
- priv->rx_head = RX_START;
- ether3_outw(priv->regs.config1 | CFG1_TRANSEND, REG_CONFIG1);
- ether3_outw((TX_END>>8) - 1, REG_BUFWIN);
- ether3_outw(priv->rx_head, REG_RECVPTR);
- ether3_outw(priv->rx_head >> 8, REG_RECVEND);
- ether3_outw(0, REG_TRANSMITPTR);
- ether3_outw(priv->regs.config2, REG_CONFIG2);
- ether3_outw(priv->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
- ether3_setbuffer(dev, buffer_write, 0);
- ether3_writelong(dev, 0);
- priv->regs.command = CMD_ENINTRX | CMD_ENINTTX;
- ether3_outw(priv->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 + 1);
- read_low = ether3_inb(REG_RECVPTR);
- read_high = ether3_inb(REG_RECVPTR + 1);
- 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)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- netif_stop_queue(dev);
- disable_irq(dev->irq);
- ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND);
- priv->regs.command = 0;
- while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON));
- ether3_outb(0x80, REG_CONFIG2 + 1);
- ether3_outw(0, REG_COMMAND);
- free_irq(dev->irq, dev);
- return 0;
- }
- /*
- * Get the current statistics. This may be called with the card open or
- * closed.
- */
- static struct net_device_stats *ether3_getstats(struct net_device *dev)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- return &priv->stats;
- }
- /*
- * 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)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- priv->regs.config1 &= ~CFG1_RECVPROMISC;
- if (dev->flags & IFF_PROMISC) {
- /* promiscuous mode */
- priv->regs.config1 |= CFG1_RECVPROMISC;
- } else if (dev->flags & IFF_ALLMULTI) {
- priv->regs.config1 |= CFG1_RECVSPECBRMULTI;
- } else
- priv->regs.config1 |= CFG1_RECVSPECBROAD;
- ether3_outw(priv->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1);
- }
- static void
- ether3_timeout(struct net_device *dev)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- unsigned long flags;
- del_timer(&priv->timer);
- save_flags_cli(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=%Xn", dev->name,
- priv->tx_head, priv->tx_tail);
- ether3_setbuffer(dev, buffer_read, priv->tx_tail);
- printk(KERN_ERR "%s: packet status = %08Xn", dev->name, ether3_readlong(dev));
- restore_flags(flags);
- priv->regs.config2 |= CFG2_CTRLO;
- priv->stats.tx_errors += 1;
- ether3_outw(priv->regs.config2, REG_CONFIG2);
- priv->tx_head = priv->tx_tail = 0;
- netif_wake_queue(dev);
- }
- /*
- * Transmit a packet
- */
- static int
- ether3_sendpacket(struct sk_buff *skb, struct net_device *dev)
- {
- struct dev_priv *priv = (struct dev_priv *)dev->priv;
- unsigned long flags;
- unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
- unsigned int ptr, next_ptr;
- length = (length + 1) & ~1;
- if (priv->broken) {
- dev_kfree_skb(skb);
- priv->stats.tx_dropped ++;
- netif_start_queue(dev);
- return 0;
- }
- next_ptr = (priv->tx_head + 1) & 15;
- save_flags_cli(flags);
- if (priv->tx_tail == next_ptr) {
- restore_flags(flags);
- return 1; /* unable to queue */
- }
- dev->trans_start = jiffies;
- ptr = 0x600 * priv->tx_head;
- priv->tx_head = next_ptr;
- next_ptr *= 0x600;
- #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, priv);
- if (!(ether3_inw(REG_STATUS) & STAT_TXON)) {
- ether3_outw(ptr, REG_TRANSMITPTR);
- ether3_outw(priv->regs.command | CMD_TXON, REG_COMMAND);
- }
- next_ptr = (priv->tx_head + 1) & 15;
- restore_flags(flags);
- dev_kfree_skb(skb);
- if (priv->tx_tail == next_ptr)
- netif_stop_queue(dev);
- return 0;
- }
- static void
- ether3_interrupt(int irq, void *dev_id, struct pt_regs *regs)
- {
- struct net_device *dev = (struct net_device *)dev_id;
- struct dev_priv *priv;
- unsigned int status;
- #if NET_DEBUG > 1
- if(net_debug & DEBUG_INT)
- printk("eth3irq: %d ", irq);
- #endif
- priv = (struct dev_priv *)dev->priv;
- status = ether3_inw(REG_STATUS);
- if (status & STAT_INTRX) {
- ether3_outw(CMD_ACKINTRX | priv->regs.command, REG_COMMAND);
- ether3_rx(dev, priv, 12);
- }
- if (status & STAT_INTTX) {
- ether3_outw(CMD_ACKINTTX | priv->regs.command, REG_COMMAND);
- ether3_tx(dev, priv);
- }
- #if NET_DEBUG > 1
- if(net_debug & DEBUG_INT)
- printk("donen");
- #endif
- }
- /*
- * If we have a good packet(s), get it/them out of the buffers.
- */
- static int
- ether3_rx(struct net_device *dev, struct dev_priv *priv, unsigned int maxcnt)
- {
- unsigned int next_ptr = priv->rx_head, received = 0;
- ether3_ledon(dev, priv);
- 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) {
- int i;
- printk("%s: bad next pointer @%04X: ", dev->name, priv->rx_head);
- printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8);
- for (i = 2; i < 14; i++)
- printk("%02X ", addrs[i]);
- printk("n");
- next_ptr = priv->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 = dev_alloc_skb(length + 2);
- if (skb) {
- unsigned char *buf;
- skb->dev = dev;
- 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
- goto dropping;
- } else {
- struct net_device_stats *stats = &priv->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:
- priv->stats.rx_packets += received;
- priv->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)) {
- priv->stats.rx_dropped ++;
- ether3_outw(next_ptr, REG_RECVPTR);
- ether3_outw(priv->regs.command | CMD_RXON, REG_COMMAND);
- }
- return maxcnt;
- dropping:{
- static unsigned long last_warned;
- ether3_outw(next_ptr >> 8, REG_RECVEND);
- /*
- * Don't print this message too many times...
- */
- if (jiffies - last_warned > 30 * HZ) {
- last_warned = jiffies;
- printk("%s: memory squeeze, dropping packet.n", dev->name);
- }
- priv->stats.rx_dropped ++;
- goto done;
- }
- }
- /*
- * Update stats for the transmitted packet(s)
- */
- static void
- ether3_tx(struct net_device *dev, struct dev_priv *priv)
- {
- unsigned int tx_tail = priv->tx_tail;
- int max_work = 14;
- do {
- unsigned long status;
- /*
- * Read the packet header
- */
- ether3_setbuffer(dev, buffer_read, tx_tail * 0x600);
- 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)))
- priv->stats.tx_packets++;
- else {
- priv->stats.tx_errors ++;
- if (status & TXSTAT_16COLLISIONS) priv->stats.collisions += 16;
- if (status & TXSTAT_BABBLED) priv->stats.tx_fifo_errors ++;
- }
- tx_tail = (tx_tail + 1) & 15;
- } while (--max_work);
- if (priv->tx_tail != tx_tail) {
- priv->tx_tail = tx_tail;
- netif_wake_queue(dev);
- }
- }
- static void __init ether3_banner(void)
- {
- static unsigned version_printed = 0;
- if (net_debug && version_printed++ == 0)
- printk(KERN_INFO "%s", version);
- }
- static const char * __init
- ether3_get_dev(struct net_device *dev, struct expansion_card *ec)
- {
- const char *name = "ether3";
- dev->base_addr = ecard_address(ec, ECARD_MEMC, 0);
- dev->irq = ec->irq;
- if (ec->cid.manufacturer == MANU_ANT &&
- ec->cid.product == PROD_ANT_ETHERB) {
- dev->base_addr += 0x200;
- name = "etherb";
- }
- ec->irqaddr = (volatile unsigned char *)ioaddr(dev->base_addr);
- ec->irqmask = 0xf0;
- if (ether3_addr(dev->dev_addr, ec))
- name = NULL;
- return name;
- }
- static struct net_device * __init ether3_init_one(struct expansion_card *ec)
- {
- struct net_device *dev;
- struct dev_priv *priv;
- const char *name;
- int i, bus_type;
- ether3_banner();
- ecard_claim(ec);
- dev = init_etherdev(NULL, sizeof(struct dev_priv));
- if (!dev)
- goto out;
- SET_MODULE_OWNER(dev);
- name = ether3_get_dev(dev, ec);
- if (!name)
- goto free;
- /*
- * this will not fail - the nature of the bus ensures this
- */
- if (!request_region(dev->base_addr, 128, dev->name))
- goto free;
- priv = (struct dev_priv *) dev->priv;
- /* Reset card...
- */
- ether3_outb(0x80, REG_CONFIG2 + 1);
- 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, 0x100) &&
- ether3_probe_bus_8(dev, 0x201))
- bus_type = BUS_8;
- if (bus_type == BUS_UNKNOWN &&
- ether3_probe_bus_16(dev, 0x101) &&
- ether3_probe_bus_16(dev, 0x201))
- bus_type = BUS_16;
- switch (bus_type) {
- case BUS_UNKNOWN:
- printk(KERN_ERR "%s: unable to identify bus widthn", dev->name);
- goto failed;
- case BUS_8:
- printk(KERN_ERR "%s: %s found, but is an unsupported "
- "8-bit cardn", dev->name, name);
- goto failed;
- default:
- break;
- }
- printk("%s: %s in slot %d, ", dev->name, name, ec->slot_no);
- for (i = 0; i < 6; i++)
- printk("%2.2x%c", dev->dev_addr[i], i == 5 ? 'n' : ':');
- if (ether3_init_2(dev))
- goto failed;
- dev->open = ether3_open;
- dev->stop = ether3_close;
- dev->hard_start_xmit = ether3_sendpacket;
- dev->get_stats = ether3_getstats;
- dev->set_multicast_list = ether3_setmulticastlist;
- dev->tx_timeout = ether3_timeout;
- dev->watchdog_timeo = 5 * HZ / 100;
- return 0;
- failed:
- release_region(dev->base_addr, 128);
- free:
- unregister_netdev(dev);
- kfree(dev);
- out:
- ecard_release(ec);
- return NULL;
- }
- static struct expansion_card *e_card[MAX_ECARDS];
- static struct net_device *e_dev[MAX_ECARDS];
- static int ether3_init(void)
- {
- int i, ret = -ENODEV;
- ecard_startfind();
- for (i = 0; i < MAX_ECARDS; i++) {
- struct net_device *dev;
- struct expansion_card *ec;
- ec = ecard_find(0, ether3_cids);
- if (!ec)
- break;
- dev = ether3_init_one(ec);
- if (!dev)
- break;
- e_card[i] = ec;
- e_dev[i] = dev;
- ret = 0;
- }
- return ret;
- }
- static void ether3_exit(void)
- {
- int i;
- for (i = 0; i < MAX_ECARDS; i++) {
- if (e_dev[i]) {
- unregister_netdev(e_dev[i]);
- release_region(e_dev[i]->base_addr, 128);
- kfree(e_dev[i]);
- e_dev[i] = NULL;
- }
- if (e_card[i]) {
- ecard_release(e_card[i]);
- e_card[i] = NULL;
- }
- }
- }
- module_init(ether3_init);
- module_exit(ether3_exit);
- MODULE_LICENSE("GPL");