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diff --git a/linux/src/drivers/net/at1700.c b/linux/src/drivers/net/at1700.c
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+/* at1700.c: A network device driver for the Allied Telesis AT1700.
+
+ Written 1993-98 by Donald Becker.
+
+ Copyright 1993 United States Government as represented by the
+ Director, National Security Agency.
+
+ This software may be used and distributed according to the terms
+ of the GNU Public License, incorporated herein by reference.
+
+ The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
+ Center of Excellence in Space Data and Information Sciences
+ Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
+
+ This is a device driver for the Allied Telesis AT1700, which is a
+ straight-forward Fujitsu MB86965 implementation.
+
+ Sources:
+ The Fujitsu MB86965 datasheet.
+
+ After the initial version of this driver was written Gerry Sawkins of
+ ATI provided their EEPROM configuration code header file.
+ Thanks to NIIBE Yutaka <gniibe@mri.co.jp> for bug fixes.
+
+ Bugs:
+ The MB86965 has a design flaw that makes all probes unreliable. Not
+ only is it difficult to detect, it also moves around in I/O space in
+ response to inb()s from other device probes!
+*/
+
+static const char *version =
+ "at1700.c:v1.15 4/7/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
+
+#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/malloc.h>
+#include <linux/string.h>
+#include <asm/system.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/errno.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+
+/* Tunable parameters. */
+
+/* When to switch from the 64-entry multicast filter to Rx-all-multicast. */
+#define MC_FILTERBREAK 64
+
+/* These unusual address orders are used to verify the CONFIG register. */
+static int at1700_probe_list[] =
+{0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0};
+static int fmv18x_probe_list[] =
+{0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0};
+
+
+/* use 0 for production, 1 for verification, >2 for debug */
+#ifndef NET_DEBUG
+#define NET_DEBUG 1
+#endif
+static unsigned int net_debug = NET_DEBUG;
+
+typedef unsigned char uchar;
+
+/* Information that need to be kept for each board. */
+struct net_local {
+ struct enet_statistics stats;
+ unsigned char mc_filter[8];
+ uint jumpered:1; /* Set iff the board has jumper config. */
+ uint tx_started:1; /* Packets are on the Tx queue. */
+ uint invalid_irq:1;
+ uchar tx_queue; /* Number of packet on the Tx queue. */
+ ushort tx_queue_len; /* Current length of the Tx queue. */
+};
+
+
+/* Offsets from the base address. */
+#define STATUS 0
+#define TX_STATUS 0
+#define RX_STATUS 1
+#define TX_INTR 2 /* Bit-mapped interrupt enable registers. */
+#define RX_INTR 3
+#define TX_MODE 4
+#define RX_MODE 5
+#define CONFIG_0 6 /* Misc. configuration settings. */
+#define CONFIG_1 7
+/* Run-time register bank 2 definitions. */
+#define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */
+#define TX_START 10
+#define MODE13 13
+/* Configuration registers only on the '865A/B chips. */
+#define EEPROM_Ctrl 16
+#define EEPROM_Data 17
+#define IOCONFIG 18 /* Either read the jumper, or move the I/O. */
+#define IOCONFIG1 19
+#define SAPROM 20 /* The station address PROM, if no EEPROM. */
+#define RESET 31 /* Write to reset some parts of the chip. */
+#define AT1700_IO_EXTENT 32
+/* Index to functions, as function prototypes. */
+
+extern int at1700_probe(struct device *dev);
+
+static int at1700_probe1(struct device *dev, int ioaddr);
+static int read_eeprom(int ioaddr, int location);
+static int net_open(struct device *dev);
+static int net_send_packet(struct sk_buff *skb, struct device *dev);
+static void net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
+static void net_rx(struct device *dev);
+static int net_close(struct device *dev);
+static struct enet_statistics *net_get_stats(struct device *dev);
+static void set_rx_mode(struct device *dev);
+
+
+/* Check for a network adaptor of this type, and return '0' iff one exists.
+ If dev->base_addr == 0, probe all likely locations.
+ If dev->base_addr == 1, always return failure.
+ If dev->base_addr == 2, allocate space for the device and return success
+ (detachable devices only).
+ */
+#ifdef HAVE_DEVLIST
+/* Support for a alternate probe manager, which will eliminate the
+ boilerplate below. */
+struct netdev_entry at1700_drv =
+{"at1700", at1700_probe1, AT1700_IO_EXTENT, at1700_probe_list};
+#else
+int
+at1700_probe(struct device *dev)
+{
+ int i;
+ int base_addr = dev ? dev->base_addr : 0;
+
+ if (base_addr > 0x1ff) /* Check a single specified location. */
+ return at1700_probe1(dev, base_addr);
+ else if (base_addr != 0) /* Don't probe at all. */
+ return ENXIO;
+
+ for (i = 0; at1700_probe_list[i]; i++) {
+ int ioaddr = at1700_probe_list[i];
+ if (check_region(ioaddr, AT1700_IO_EXTENT))
+ continue;
+ if (at1700_probe1(dev, ioaddr) == 0)
+ return 0;
+ }
+
+ return ENODEV;
+}
+#endif
+
+/* The Fujitsu datasheet suggests that the NIC be probed for by checking its
+ "signature", the default bit pattern after a reset. This *doesn't* work --
+ there is no way to reset the bus interface without a complete power-cycle!
+
+ It turns out that ATI came to the same conclusion I did: the only thing
+ that can be done is checking a few bits and then diving right into an
+ EEPROM read. */
+
+int at1700_probe1(struct device *dev, int ioaddr)
+{
+ char fmv_irqmap[4] = {3, 7, 10, 15};
+ char at1700_irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15};
+ unsigned int i, irq, is_fmv18x = 0, is_at1700 = 0;
+
+ /* Resetting the chip doesn't reset the ISA interface, so don't bother.
+ That means we have to be careful with the register values we probe for.
+ */
+#ifdef notdef
+ printk("at1700 probe at %#x, eeprom is %4.4x %4.4x %4.4x ctrl %4.4x.\n",
+ ioaddr, read_eeprom(ioaddr, 4), read_eeprom(ioaddr, 5),
+ read_eeprom(ioaddr, 6), inw(ioaddr + EEPROM_Ctrl));
+#endif
+ /* We must check for the EEPROM-config boards first, else accessing
+ IOCONFIG0 will move the board! */
+ if (at1700_probe_list[inb(ioaddr + IOCONFIG1) & 0x07] == ioaddr
+ && read_eeprom(ioaddr, 4) == 0x0000
+ && (read_eeprom(ioaddr, 5) & 0xff00) == 0xF400)
+ is_at1700 = 1;
+ else if (fmv18x_probe_list[inb(ioaddr + IOCONFIG) & 0x07] == ioaddr
+ && inb(ioaddr + SAPROM ) == 0x00
+ && inb(ioaddr + SAPROM + 1) == 0x00
+ && inb(ioaddr + SAPROM + 2) == 0x0e)
+ is_fmv18x = 1;
+ else
+ return -ENODEV;
+
+ /* Reset the internal state machines. */
+ outb(0, ioaddr + RESET);
+
+ /* Allocate a new 'dev' if needed. */
+ if (dev == NULL)
+ dev = init_etherdev(0, sizeof(struct net_local));
+
+ if (is_at1700)
+ irq = at1700_irqmap[(read_eeprom(ioaddr, 12)&0x04)
+ | (read_eeprom(ioaddr, 0)>>14)];
+ else
+ irq = fmv_irqmap[(inb(ioaddr + IOCONFIG)>>6) & 0x03];
+
+ /* Grab the region so that we can find another board if the IRQ request
+ fails. */
+ request_region(ioaddr, AT1700_IO_EXTENT, dev->name);
+
+ printk("%s: AT1700 found at %#3x, IRQ %d, address ", dev->name,
+ ioaddr, irq);
+
+ dev->base_addr = ioaddr;
+ dev->irq = irq;
+
+ for(i = 0; i < 3; i++) {
+ unsigned short eeprom_val = read_eeprom(ioaddr, 4+i);
+ printk("%04x", eeprom_val);
+ ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_val);
+ }
+
+ /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals,
+ rather than 150 ohm shielded twisted pair compensation.
+ 0x0000 == auto-sense the interface
+ 0x0800 == use TP interface
+ 0x1800 == use coax interface
+ */
+ {
+ const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"};
+ ushort setup_value = read_eeprom(ioaddr, 12);
+
+ dev->if_port = setup_value >> 8;
+ printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]);
+ }
+
+ /* Set the station address in bank zero. */
+ outb(0xe0, ioaddr + CONFIG_1);
+ for (i = 0; i < 6; i++)
+ outb(dev->dev_addr[i], ioaddr + 8 + i);
+
+ /* Switch to bank 1 and set the multicast table to accept none. */
+ outb(0xe4, ioaddr + CONFIG_1);
+ for (i = 0; i < 8; i++)
+ outb(0x00, ioaddr + 8 + i);
+
+ /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
+ bus access, two 4K Tx queues, and disabled Tx and Rx. */
+ outb(0xda, ioaddr + CONFIG_0);
+
+ /* Switch to bank 2 and lock our I/O address. */
+ outb(0xe8, ioaddr + CONFIG_1);
+ outb(dev->if_port, MODE13);
+
+ /* Power-down the chip. Aren't we green! */
+ outb(0x00, ioaddr + CONFIG_1);
+
+ if (net_debug)
+ printk(version);
+
+ /* Initialize the device structure. */
+ dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
+ if (dev->priv == NULL)
+ return -ENOMEM;
+ memset(dev->priv, 0, sizeof(struct net_local));
+
+ dev->open = net_open;
+ dev->stop = net_close;
+ dev->hard_start_xmit = net_send_packet;
+ dev->get_stats = net_get_stats;
+ dev->set_multicast_list = &set_rx_mode;
+
+ /* Fill in the fields of 'dev' with ethernet-generic values. */
+ ether_setup(dev);
+
+ {
+ struct net_local *lp = (struct net_local *)dev->priv;
+ lp->jumpered = is_fmv18x;
+ /* Snarf the interrupt vector now. */
+ if (request_irq(irq, &net_interrupt, 0, dev->name, dev)) {
+ printk (" AT1700 at %#3x is unusable due to a conflict on"
+ "IRQ %d.\n", ioaddr, irq);
+ lp->invalid_irq = 1;
+ return 0;
+ }
+ }
+
+ return 0;
+}
+
+
+/* EEPROM_Ctrl bits. */
+#define EE_SHIFT_CLK 0x40 /* EEPROM shift clock, in reg. 16. */
+#define EE_CS 0x20 /* EEPROM chip select, in reg. 16. */
+#define EE_DATA_WRITE 0x80 /* EEPROM chip data in, in reg. 17. */
+#define EE_DATA_READ 0x80 /* EEPROM chip data out, in reg. 17. */
+
+/* Delay between EEPROM clock transitions. */
+#define eeprom_delay() do {} while (0);
+
+/* The EEPROM commands include the alway-set leading bit. */
+#define EE_WRITE_CMD (5 << 6)
+#define EE_READ_CMD (6 << 6)
+#define EE_ERASE_CMD (7 << 6)
+
+static int read_eeprom(int ioaddr, int location)
+{
+ int i;
+ unsigned short retval = 0;
+ int ee_addr = ioaddr + EEPROM_Ctrl;
+ int ee_daddr = ioaddr + EEPROM_Data;
+ int read_cmd = location | EE_READ_CMD;
+
+ /* Shift the read command bits out. */
+ for (i = 9; i >= 0; i--) {
+ short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+ outb(EE_CS, ee_addr);
+ outb(dataval, ee_daddr);
+ eeprom_delay();
+ outb(EE_CS | EE_SHIFT_CLK, ee_addr); /* EEPROM clock tick. */
+ eeprom_delay();
+ }
+ outb(EE_DATA_WRITE, ee_daddr);
+ for (i = 16; i > 0; i--) {
+ outb(EE_CS, ee_addr);
+ eeprom_delay();
+ outb(EE_CS | EE_SHIFT_CLK, ee_addr);
+ eeprom_delay();
+ retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0);
+ }
+
+ /* Terminate the EEPROM access. */
+ outb(EE_CS, ee_addr);
+ eeprom_delay();
+ outb(EE_SHIFT_CLK, ee_addr);
+ outb(0, ee_addr);
+ return retval;
+}
+
+
+
+static int net_open(struct device *dev)
+{
+ struct net_local *lp = (struct net_local *)dev->priv;
+ int ioaddr = dev->base_addr;
+ int i;
+
+ /* Powerup the chip, initialize config register 1, and select bank 0. */
+ outb(0xe0, ioaddr + CONFIG_1);
+
+ /* Set the station address in bank zero. */
+ for (i = 0; i < 6; i++)
+ outb(dev->dev_addr[i], ioaddr + 8 + i);
+
+ /* Switch to bank 1 and set the multicast table to accept none. */
+ outb(0xe4, ioaddr + CONFIG_1);
+ for (i = 0; i < 8; i++)
+ outb(0x00, ioaddr + 8 + i);
+
+ /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
+ bus access, and two 4K Tx queues. */
+ outb(0xda, ioaddr + CONFIG_0);
+
+ /* Switch to register bank 2, enable the Rx and Tx. */
+ outw(0xe85a, ioaddr + CONFIG_0);
+
+ lp->tx_started = 0;
+ lp->tx_queue = 0;
+ lp->tx_queue_len = 0;
+
+ /* Turn on Rx interrupts, leave Tx interrupts off until packet Tx. */
+ outb(0x00, ioaddr + TX_INTR);
+ outb(0x81, ioaddr + RX_INTR);
+
+ dev->tbusy = 0;
+ dev->interrupt = 0;
+ dev->start = 1;
+
+ MOD_INC_USE_COUNT;
+
+ return 0;
+}
+
+static int
+net_send_packet(struct sk_buff *skb, struct device *dev)
+{
+ struct net_local *lp = (struct net_local *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ if (dev->tbusy) {
+ /* If we get here, some higher level has decided we are broken.
+ There should really be a "kick me" function call instead. */
+ int tickssofar = jiffies - dev->trans_start;
+ if (tickssofar < 10)
+ return 1;
+ printk("%s: transmit timed out with status %04x, %s?\n", dev->name,
+ inw(ioaddr + STATUS), inb(ioaddr + TX_STATUS) & 0x80
+ ? "IRQ conflict" : "network cable problem");
+ printk("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n",
+ dev->name, inw(ioaddr + 0), inw(ioaddr + 2), inw(ioaddr + 4),
+ inw(ioaddr + 6), inw(ioaddr + 8), inw(ioaddr + 10),
+ inw(ioaddr + 12), inw(ioaddr + 14));
+ lp->stats.tx_errors++;
+ /* ToDo: We should try to restart the adaptor... */
+ outw(0xffff, ioaddr + 24);
+ outw(0xffff, ioaddr + TX_STATUS);
+ outw(0xe85a, ioaddr + CONFIG_0);
+ outw(0x8100, ioaddr + TX_INTR);
+ dev->tbusy=0;
+ dev->trans_start = jiffies;
+ lp->tx_started = 0;
+ lp->tx_queue = 0;
+ lp->tx_queue_len = 0;
+ }
+
+ /* If some higher layer thinks we've missed an tx-done interrupt
+ we are passed NULL. Caution: dev_tint() handles the cli()/sti()
+ itself. */
+ if (skb == NULL) {
+ dev_tint(dev);
+ return 0;
+ }
+
+ /* Block a timer-based transmit from overlapping. This could better be
+ done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
+ if (set_bit(0, (void*)&dev->tbusy) != 0)
+ printk("%s: Transmitter access conflict.\n", dev->name);
+ else {
+ short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
+ unsigned char *buf = skb->data;
+
+ /* Turn off the possible Tx interrupts. */
+ outb(0x00, ioaddr + TX_INTR);
+
+ outw(length, ioaddr + DATAPORT);
+ outsw(ioaddr + DATAPORT, buf, (length + 1) >> 1);
+
+ lp->tx_queue++;
+ lp->tx_queue_len += length + 2;
+
+ if (lp->tx_started == 0) {
+ /* If the Tx is idle, always trigger a transmit. */
+ outb(0x80 | lp->tx_queue, ioaddr + TX_START);
+ lp->tx_queue = 0;
+ lp->tx_queue_len = 0;
+ dev->trans_start = jiffies;
+ lp->tx_started = 1;
+ dev->tbusy = 0;
+ } else if (lp->tx_queue_len < 4096 - 1502)
+ /* Yes, there is room for one more packet. */
+ dev->tbusy = 0;
+
+ /* Turn on Tx interrupts back on. */
+ outb(0x82, ioaddr + TX_INTR);
+ }
+ dev_kfree_skb (skb, FREE_WRITE);
+
+ return 0;
+}
+
+/* The typical workload of the driver:
+ Handle the network interface interrupts. */
+static void
+net_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ struct device *dev = dev_id;
+ struct net_local *lp;
+ int ioaddr, status;
+
+ if (dev == NULL) {
+ printk ("at1700_interrupt(): irq %d for unknown device.\n", irq);
+ return;
+ }
+ dev->interrupt = 1;
+
+ ioaddr = dev->base_addr;
+ lp = (struct net_local *)dev->priv;
+ status = inw(ioaddr + TX_STATUS);
+ outw(status, ioaddr + TX_STATUS);
+
+ if (net_debug > 4)
+ printk("%s: Interrupt with status %04x.\n", dev->name, status);
+ if (status & 0xff00
+ || (inb(ioaddr + RX_MODE) & 0x40) == 0) { /* Got a packet(s). */
+ net_rx(dev);
+ }
+ if (status & 0x00ff) {
+ if (status & 0x80) {
+ lp->stats.tx_packets++;
+ if (lp->tx_queue) {
+ outb(0x80 | lp->tx_queue, ioaddr + TX_START);
+ lp->tx_queue = 0;
+ lp->tx_queue_len = 0;
+ dev->trans_start = jiffies;
+ dev->tbusy = 0;
+ mark_bh(NET_BH); /* Inform upper layers. */
+ } else {
+ lp->tx_started = 0;
+ /* Turn on Tx interrupts off. */
+ outb(0x00, ioaddr + TX_INTR);
+ dev->tbusy = 0;
+ mark_bh(NET_BH); /* Inform upper layers. */
+ }
+ }
+ }
+
+ dev->interrupt = 0;
+ return;
+}
+
+/* We have a good packet(s), get it/them out of the buffers. */
+static void
+net_rx(struct device *dev)
+{
+ struct net_local *lp = (struct net_local *)dev->priv;
+ int ioaddr = dev->base_addr;
+ int boguscount = 5;
+
+ while ((inb(ioaddr + RX_MODE) & 0x40) == 0) {
+ ushort status = inw(ioaddr + DATAPORT);
+ ushort pkt_len = inw(ioaddr + DATAPORT);
+
+ if (net_debug > 4)
+ printk("%s: Rxing packet mode %02x status %04x.\n",
+ dev->name, inb(ioaddr + RX_MODE), status);
+#ifndef final_version
+ if (status == 0) {
+ outb(0x05, ioaddr + 14);
+ break;
+ }
+#endif
+
+ if ((status & 0xF0) != 0x20) { /* There was an error. */
+ lp->stats.rx_errors++;
+ if (status & 0x08) lp->stats.rx_length_errors++;
+ if (status & 0x04) lp->stats.rx_frame_errors++;
+ if (status & 0x02) lp->stats.rx_crc_errors++;
+ if (status & 0x01) lp->stats.rx_over_errors++;
+ } else {
+ /* Malloc up new buffer. */
+ struct sk_buff *skb;
+
+ if (pkt_len > 1550) {
+ printk("%s: The AT1700 claimed a very large packet, size %d.\n",
+ dev->name, pkt_len);
+ /* Prime the FIFO and then flush the packet. */
+ inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
+ outb(0x05, ioaddr + 14);
+ lp->stats.rx_errors++;
+ break;
+ }
+ skb = dev_alloc_skb(pkt_len+3);
+ if (skb == NULL) {
+ printk("%s: Memory squeeze, dropping packet (len %d).\n",
+ dev->name, pkt_len);
+ /* Prime the FIFO and then flush the packet. */
+ inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT);
+ outb(0x05, ioaddr + 14);
+ lp->stats.rx_dropped++;
+ break;
+ }
+ skb->dev = dev;
+ skb_reserve(skb,2);
+
+ insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1);
+ skb->protocol=eth_type_trans(skb, dev);
+ netif_rx(skb);
+ lp->stats.rx_packets++;
+ }
+ if (--boguscount <= 0)
+ break;
+ }
+
+ /* If any worth-while packets have been received, dev_rint()
+ has done a mark_bh(NET_BH) for us and will work on them
+ when we get to the bottom-half routine. */
+ {
+ int i;
+ for (i = 0; i < 20; i++) {
+ if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40)
+ break;
+ inw(ioaddr + DATAPORT); /* dummy status read */
+ outb(0x05, ioaddr + 14);
+ }
+
+ if (net_debug > 5)
+ printk("%s: Exint Rx packet with mode %02x after %d ticks.\n",
+ dev->name, inb(ioaddr + RX_MODE), i);
+ }
+ return;
+}
+
+/* The inverse routine to net_open(). */
+static int net_close(struct device *dev)
+{
+ struct net_local *lp = (struct net_local *)dev->priv;
+ int ioaddr = dev->base_addr;
+
+ dev->tbusy = 1;
+ dev->start = 0;
+
+ /* Set configuration register 0 to disable Tx and Rx. */
+ outb(0xda, ioaddr + CONFIG_0);
+
+ /* No statistic counters on the chip to update. */
+
+#if 0
+ /* Disable the IRQ on boards where it is feasible. */
+ if (lp->jumpered) {
+ outb(0x00, ioaddr + IOCONFIG1);
+ free_irq(dev->irq, dev);
+ }
+#endif
+
+ /* Power-down the chip. Green, green, green! */
+ outb(0x00, ioaddr + CONFIG_1);
+
+ MOD_DEC_USE_COUNT;
+
+ return 0;
+}
+
+/* Get the current statistics.
+ This may be called with the card open or closed.
+ There are no on-chip counters, so this function is trivial.
+*/
+static struct enet_statistics *
+net_get_stats(struct device *dev)
+{
+ struct net_local *lp = (struct net_local *)dev->priv;
+ return &lp->stats;
+}
+
+/*
+ Set the multicast/promiscuous mode for this adaptor.
+*/
+
+/* The little-endian AUTODIN II ethernet CRC calculation.
+ N.B. Do not use for bulk data, use a table-based routine instead.
+ This is common code and should be moved to net/core/crc.c */
+static unsigned const ethernet_polynomial_le = 0xedb88320U;
+static inline unsigned ether_crc_le(int length, unsigned char *data)
+{
+ unsigned int crc = 0xffffffff; /* Initial value. */
+ while(--length >= 0) {
+ unsigned char current_octet = *data++;
+ int bit;
+ for (bit = 8; --bit >= 0; current_octet >>= 1) {
+ if ((crc ^ current_octet) & 1) {
+ crc >>= 1;
+ crc ^= ethernet_polynomial_le;
+ } else
+ crc >>= 1;
+ }
+ }
+ return crc;
+}
+
+static void
+set_rx_mode(struct device *dev)
+{
+ int ioaddr = dev->base_addr;
+ struct net_local *lp = (struct net_local *)dev->priv;
+ unsigned char mc_filter[8]; /* Multicast hash filter */
+ long flags;
+ int i;
+
+ if (dev->flags & IFF_PROMISC) {
+ /* Unconditionally log net taps. */
+ printk("%s: Promiscuous mode enabled.\n", dev->name);
+ memset(mc_filter, 0xff, sizeof(mc_filter));
+ outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */
+ } else if (dev->mc_count > MC_FILTERBREAK
+ || (dev->flags & IFF_ALLMULTI)) {
+ /* Too many to filter perfectly -- accept all multicasts. */
+ memset(mc_filter, 0xff, sizeof(mc_filter));
+ outb(2, ioaddr + RX_MODE); /* Use normal mode. */
+ } else if (dev->mc_count == 0) {
+ memset(mc_filter, 0x00, sizeof(mc_filter));
+ outb(1, ioaddr + RX_MODE); /* Ignore almost all multicasts. */
+ } else {
+ struct dev_mc_list *mclist;
+ int i;
+
+ memset(mc_filter, 0, sizeof(mc_filter));
+ for (i = 0, mclist = dev->mc_list; mclist && i < dev->mc_count;
+ i++, mclist = mclist->next)
+ set_bit(ether_crc_le(ETH_ALEN, mclist->dmi_addr) >> 26,
+ mc_filter);
+ }
+
+ save_flags(flags);
+ cli();
+ if (memcmp(mc_filter, lp->mc_filter, sizeof(mc_filter))) {
+ int saved_bank = inw(ioaddr + CONFIG_0);
+ /* Switch to bank 1 and set the multicast table. */
+ outw((saved_bank & ~0x0C00) | 0x0480, ioaddr + CONFIG_0);
+ for (i = 0; i < 8; i++)
+ outb(mc_filter[i], ioaddr + 8 + i);
+ memcpy(lp->mc_filter, mc_filter, sizeof(mc_filter));
+ outw(saved_bank, ioaddr + CONFIG_0);
+ }
+ restore_flags(flags);
+ return;
+}
+
+#ifdef MODULE
+static char devicename[9] = { 0, };
+static struct device dev_at1700 = {
+ devicename, /* device name is inserted by linux/drivers/net/net_init.c */
+ 0, 0, 0, 0,
+ 0, 0,
+ 0, 0, 0, NULL, at1700_probe };
+
+static int io = 0x260;
+static int irq = 0;
+
+int init_module(void)
+{
+ if (io == 0)
+ printk("at1700: You should not use auto-probing with insmod!\n");
+ dev_at1700.base_addr = io;
+ dev_at1700.irq = irq;
+ if (register_netdev(&dev_at1700) != 0) {
+ printk("at1700: register_netdev() returned non-zero.\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+void
+cleanup_module(void)
+{
+ unregister_netdev(&dev_at1700);
+ kfree(dev_at1700.priv);
+ dev_at1700.priv = NULL;
+
+ /* If we don't do this, we can't re-insmod it later. */
+ free_irq(dev_at1700.irq, NULL);
+ release_region(dev_at1700.base_addr, AT1700_IO_EXTENT);
+}
+#endif /* MODULE */
+
+/*
+ * Local variables:
+ * compile-command: "gcc -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"
+ * alt-compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O6 -c at1700.c"
+ * tab-width: 4
+ * c-basic-offset: 4
+ * c-indent-level: 4
+ * End:
+ */
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