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path: root/drivers/net/ethernet/seeq/ether3.c
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Diffstat (limited to 'drivers/net/ethernet/seeq/ether3.c')
-rw-r--r--drivers/net/ethernet/seeq/ether3.c918
1 files changed, 918 insertions, 0 deletions
diff --git a/drivers/net/ethernet/seeq/ether3.c b/drivers/net/ethernet/seeq/ether3.c
new file mode 100644
index 000000000000..44a8746f4014
--- /dev/null
+++ b/drivers/net/ethernet/seeq/ether3.c
@@ -0,0 +1,918 @@
+/*
+ * 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/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/system.h>
+#include <asm/ecard.h>
+#include <asm/io.h>
+
+static char version[] __devinitdata = "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 int 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);
+
+#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, const void __iomem *r)
+{
+ writeb(v, r);
+ udelay(1);
+}
+
+static inline void ether3_outw(int v, const 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(unsigned long data)
+{
+ struct net_device *dev = (struct net_device *)data;
+ ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2);
+}
+
+/*
+ * switch LED on...
+ */
+static inline void ether3_ledon(struct net_device *dev)
+{
+ del_timer(&priv(dev)->timer);
+ priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */
+ priv(dev)->timer.data = (unsigned long)dev;
+ priv(dev)->timer.function = ether3_ledoff;
+ 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 __devinit
+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 __devinit
+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%04X\n", i - 1);
+ printk("\n");
+ bad = -1;
+ }
+ }
+ }
+ if (bad != -1)
+ printk(" - 0xffff\n");
+ kfree(buffer);
+
+ return ret;
+}
+
+/* ------------------------------------------------------------------------------- */
+
+static int __devinit 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, 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)
+{
+ 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 (!is_valid_ether_addr(dev->dev_addr)) {
+ printk(KERN_WARNING "%s: invalid ethernet MAC address\n",
+ dev->name);
+ return -EINVAL;
+ }
+
+ 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(0x80, 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 long flags;
+
+ del_timer(&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 int
+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 = 0x600 * priv(dev)->tx_head;
+ priv(dev)->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);
+
+ 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) {
+ int i;
+ 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);
+ for (i = 2; i < 14; i++)
+ printk("%02X ", addrs[i]);
+ printk("\n");
+ 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 = dev_alloc_skb(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
+ goto dropping;
+ } 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;
+
+dropping:{
+ static unsigned long last_warned;
+
+ ether3_outw(next_ptr >> 8, REG_RECVEND);
+ /*
+ * Don't print this message too many times...
+ */
+ if (time_after(jiffies, last_warned + 10 * HZ)) {
+ last_warned = jiffies;
+ printk("%s: memory squeeze, dropping packet.\n", dev->name);
+ }
+ dev->stats.rx_dropped++;
+ goto done;
+ }
+}
+
+/*
+ * 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 * 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)))
+ 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 __devinit 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_multicast_list = ether3_setmulticastlist,
+ .ndo_tx_timeout = ether3_timeout,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+};
+
+static int __devinit
+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;
+
+ 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 = 0xf0;
+
+ priv(dev)->seeq = priv(dev)->base + data->base_offset;
+ dev->irq = ec->irq;
+
+ ether3_addr(dev->dev_addr, ec);
+
+ init_timer(&priv(dev)->timer);
+
+ /* Reset card...
+ */
+ ether3_outb(0x80, 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, 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 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 = &ether3_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 __devexit ether3_remove(struct expansion_card *ec)
+{
+ struct net_device *dev = ecard_get_drvdata(ec);
+
+ ecard_set_drvdata(ec, NULL);
+
+ unregister_netdev(dev);
+ 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 = 0x800,
+};
+
+static const struct ecard_id ether3_ids[] = {
+ { MANU_ANT2, PROD_ANT_ETHER3, &ether3 },
+ { MANU_ANT, PROD_ANT_ETHER3, &ether3 },
+ { MANU_ANT, PROD_ANT_ETHERB, &etherb },
+ { 0xffff, 0xffff }
+};
+
+static struct ecard_driver ether3_driver = {
+ .probe = ether3_probe,
+ .remove = __devexit_p(ether3_remove),
+ .id_table = ether3_ids,
+ .drv = {
+ .name = "ether3",
+ },
+};
+
+static int __init ether3_init(void)
+{
+ return ecard_register_driver(&ether3_driver);
+}
+
+static void __exit ether3_exit(void)
+{
+ ecard_remove_driver(&ether3_driver);
+}
+
+module_init(ether3_init);
+module_exit(ether3_exit);
+
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-24 05:03:43 +0300