at1700.c
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上传日期:2013-04-10
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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 General Public License, incorporated herein by reference.
- The author may be reached as becker@scyld.com, or C/O
- Scyld Computing Corporation
- 410 Severn Ave., Suite 210
- Annapolis MD 21403
- This is a device driver for the Allied Telesis AT1700, and
- Fujitsu FMV-181/182/181A/182A/183/184/183A/184A, which are
- straight-forward Fujitsu MB86965 implementations.
- Modification for Fujitsu FMV-18X cards is done by Yutaka Tamiya
- (tamy@flab.fujitsu.co.jp).
- 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.
- MCA bus (AT1720) support by Rene Schmit <rene@bss.lu>
- 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!
- */
- #include <linux/config.h>
- #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/init.h>
- #include <linux/crc32.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>
- #include <linux/mca.h>
- static char version[] __initdata =
- "at1700.c:v1.15 4/7/98 Donald Becker (becker@cesdis.gsfc.nasa.gov)n";
- /* 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 fmv18x_probe_list[] __initdata = {
- 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0
- };
- /*
- * ISA
- */
- static int at1700_probe_list[] __initdata = {
- 0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0
- };
- /*
- * MCA
- */
- #ifdef CONFIG_MCA
- static int at1700_ioaddr_pattern[] __initdata = {
- 0x00, 0x04, 0x01, 0x05, 0x02, 0x06, 0x03, 0x07
- };
- static int at1700_mca_probe_list[] __initdata = {
- 0x400, 0x1400, 0x2400, 0x3400, 0x4400, 0x5400, 0x6400, 0x7400, 0
- };
- static int at1700_irq_pattern[] __initdata = {
- 0x00, 0x00, 0x00, 0x30, 0x70, 0xb0, 0x00, 0x00,
- 0x00, 0xf0, 0x34, 0x74, 0xb4, 0x00, 0x00, 0xf4, 0x00
- };
- #endif
- /* 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 net_device_stats stats;
- spinlock_t lock;
- 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 tx_queue_ready:1; /* Tx queue is ready to be sent. */
- uint rx_started:1; /* Packets are Rxing. */
- uchar tx_queue; /* Number of packet on the Tx queue. */
- char mca_slot; /* -1 means ISA */
- 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 COL16CNTL 11 /* Controll Reg for 16 collisions */
- #define MODE13 13
- /* Configuration registers only on the '865A/B chips. */
- #define EEPROM_Ctrl 16
- #define EEPROM_Data 17
- #define CARDSTATUS 16 /* FMV-18x Card Status */
- #define CARDSTATUS1 17 /* FMV-18x Card Status */
- #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
- #define TX_TIMEOUT 10
- /* Index to functions, as function prototypes. */
- extern int at1700_probe(struct net_device *dev);
- static int at1700_probe1(struct net_device *dev, int ioaddr);
- static int read_eeprom(long ioaddr, int location);
- static int net_open(struct net_device *dev);
- static int net_send_packet(struct sk_buff *skb, struct net_device *dev);
- static void net_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static void net_rx(struct net_device *dev);
- static int net_close(struct net_device *dev);
- static struct net_device_stats *net_get_stats(struct net_device *dev);
- static void set_rx_mode(struct net_device *dev);
- static void net_tx_timeout (struct net_device *dev);
- #ifdef CONFIG_MCA
- struct at1720_mca_adapters_struct {
- char* name;
- int id;
- };
- /* rEnE : maybe there are others I don't know off... */
- static struct at1720_mca_adapters_struct at1720_mca_adapters[] __initdata = {
- { "Allied Telesys AT1720AT", 0x6410 },
- { "Allied Telesys AT1720BT", 0x6413 },
- { "Allied Telesys AT1720T", 0x6416 },
- { NULL, 0 },
- };
- #endif
- /* 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).
- */
- int __init at1700_probe(struct net_device *dev)
- {
- int i;
- int base_addr = dev->base_addr;
- SET_MODULE_OWNER(dev);
- 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 (at1700_probe1(dev, ioaddr) == 0)
- return 0;
- }
- return -ENODEV;
- }
- /* 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. */
- static int __init at1700_probe1(struct net_device *dev, int ioaddr)
- {
- char fmv_irqmap[4] = {3, 7, 10, 15};
- char fmv_irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15};
- char at1700_irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15};
- unsigned int i, irq, is_fmv18x = 0, is_at1700 = 0;
- int slot, ret = -ENODEV;
- struct net_local *lp;
-
- if (!request_region(ioaddr, AT1700_IO_EXTENT, dev->name))
- return -EBUSY;
- /* 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
- #ifdef CONFIG_MCA
- /* rEnE (rene@bss.lu): got this from 3c509 driver source , adapted for AT1720 */
- /* Based on Erik Nygren's (nygren@mit.edu) 3c529 patch, heavily
- modified by Chris Beauregard (cpbeaure@csclub.uwaterloo.ca)
- to support standard MCA probing. */
- /* redone for multi-card detection by ZP Gu (zpg@castle.net) */
- /* now works as a module */
- if (MCA_bus) {
- int j;
- int l_i;
- u_char pos3, pos4;
- for (j = 0; at1720_mca_adapters[j].name != NULL; j ++) {
- slot = 0;
- while (slot != MCA_NOTFOUND) {
-
- slot = mca_find_unused_adapter( at1720_mca_adapters[j].id, slot );
- if (slot == MCA_NOTFOUND) break;
- /* if we get this far, an adapter has been detected and is
- enabled */
- pos3 = mca_read_stored_pos( slot, 3 );
- pos4 = mca_read_stored_pos( slot, 4 );
- for (l_i = 0; l_i < 0x09; l_i++)
- if (( pos3 & 0x07) == at1700_ioaddr_pattern[l_i])
- break;
- ioaddr = at1700_mca_probe_list[l_i];
-
- for (irq = 0; irq < 0x10; irq++)
- if (((((pos4>>4) & 0x0f) | (pos3 & 0xf0)) & 0xff) == at1700_irq_pattern[irq])
- break;
- /* probing for a card at a particular IO/IRQ */
- if (dev &&
- ((dev->irq && dev->irq != irq) ||
- (dev->base_addr && dev->base_addr != ioaddr))) {
- slot++; /* probing next slot */
- continue;
- }
- if (dev)
- dev->irq = irq;
-
- /* claim the slot */
- mca_set_adapter_name( slot, at1720_mca_adapters[j].name );
- mca_mark_as_used(slot);
- goto found;
- }
- }
- /* if we get here, we didn't find an MCA adapter - try ISA */
- }
- #endif
- slot = -1;
- /* 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 (inb(ioaddr + SAPROM ) == 0x00
- && inb(ioaddr + SAPROM + 1) == 0x00
- && inb(ioaddr + SAPROM + 2) == 0x0e)
- is_fmv18x = 1;
- else {
- ret = -ENODEV;
- goto err_out;
- }
-
- #ifdef CONFIG_MCA
- found:
- #endif
- /* Reset the internal state machines. */
- outb(0, ioaddr + RESET);
- if (is_at1700)
- irq = at1700_irqmap[(read_eeprom(ioaddr, 12)&0x04)
- | (read_eeprom(ioaddr, 0)>>14)];
- else {
- /* Check PnP mode for FMV-183/184/183A/184A. */
- /* This PnP routine is very poor. IO and IRQ should be known. */
- if (inb(ioaddr + CARDSTATUS1) & 0x20) {
- irq = dev->irq;
- for (i = 0; i < 8; i++) {
- if (irq == fmv_irqmap_pnp[i])
- break;
- }
- if (i == 8) {
- goto err_out;
- ret = -ENODEV;
- }
- } else {
- if (fmv18x_probe_list[inb(ioaddr + IOCONFIG) & 0x07] != ioaddr)
- return -ENODEV;
- irq = fmv_irqmap[(inb(ioaddr + IOCONFIG)>>6) & 0x03];
- }
- }
- printk("%s: %s found at %#3x, IRQ %d, address ", dev->name,
- is_at1700 ? "AT1700" : "FMV-18X", ioaddr, irq);
- dev->base_addr = ioaddr;
- dev->irq = irq;
- if (is_at1700) {
- 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);
- }
- } else {
- for(i = 0; i < 6; i++) {
- unsigned char val = inb(ioaddr + SAPROM + i);
- printk("%02x", val);
- dev->dev_addr[i] = 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"};
- if (is_at1700) {
- ushort setup_value = read_eeprom(ioaddr, 12);
- dev->if_port = setup_value >> 8;
- } else {
- ushort setup_value = inb(ioaddr + CARDSTATUS);
- switch (setup_value & 0x07) {
- case 0x01: /* 10base5 */
- case 0x02: /* 10base2 */
- dev->if_port = 0x18; break;
- case 0x04: /* 10baseT */
- dev->if_port = 0x08; break;
- default: /* auto-sense */
- dev->if_port = 0x00; break;
- }
- }
- printk(" %s interface.n", porttype[(dev->if_port>>3) & 3]);
- }
- /* 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);
- /* Set the station address in bank zero. */
- outb(0x00, 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(0x04, ioaddr + CONFIG_1);
- for (i = 0; i < 8; i++)
- outb(0x00, ioaddr + 8 + i);
- /* Switch to bank 2 */
- /* Lock our I/O address, and set manual processing mode for 16 collisions. */
- outb(0x08, ioaddr + CONFIG_1);
- outb(dev->if_port, ioaddr + MODE13);
- outb(0x00, ioaddr + COL16CNTL);
- if (net_debug)
- printk(version);
- /* Initialize the device structure. */
- dev->priv = kmalloc(sizeof(struct net_local), GFP_KERNEL);
- if (dev->priv == NULL) {
- ret = -ENOMEM;
- goto err_out;
- }
- 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;
- dev->tx_timeout = net_tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
- lp = (struct net_local *)dev->priv;
- lp->lock = SPIN_LOCK_UNLOCKED;
- /* Fill in the fields of 'dev' with ethernet-generic values. */
- ether_setup(dev);
- lp->jumpered = is_fmv18x;
- lp->mca_slot = slot;
- /* Snarf the interrupt vector now. */
- ret = request_irq(irq, &net_interrupt, 0, dev->name, dev);
- if (ret) {
- printk (" AT1700 at %#3x is unusable due to a conflict on"
- "IRQ %d.n", ioaddr, irq);
- goto err_out_priv;
- }
- return 0;
- err_out_priv:
- kfree(dev->priv);
- dev->priv = NULL;
- err_out:
- release_region(ioaddr, AT1700_IO_EXTENT);
- return ret;
- }
- /* 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 __init read_eeprom(long ioaddr, int location)
- {
- int i;
- unsigned short retval = 0;
- long ee_addr = ioaddr + EEPROM_Ctrl;
- long 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 net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int ioaddr = dev->base_addr;
- /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit
- bus access, and two 4K Tx queues. */
- outb(0x5a, ioaddr + CONFIG_0);
- /* Powerup, switch to register bank 2, and enable the Rx and Tx. */
- outb(0xe8, ioaddr + CONFIG_1);
- lp->tx_started = 0;
- lp->tx_queue_ready = 1;
- lp->rx_started = 0;
- lp->tx_queue = 0;
- lp->tx_queue_len = 0;
- /* Turn on hardware Tx and Rx interrupts. */
- outb(0x82, ioaddr + TX_INTR);
- outb(0x81, ioaddr + RX_INTR);
- /* Enable the IRQ on boards of fmv18x it is feasible. */
- if (lp->jumpered) {
- outb(0x80, ioaddr + IOCONFIG1);
- }
- netif_start_queue(dev);
- return 0;
- }
- static void net_tx_timeout (struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int ioaddr = dev->base_addr;
- 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);
- outb (0x5a, ioaddr + CONFIG_0);
- outb (0xe8, ioaddr + CONFIG_1);
- outw (0x8182, ioaddr + TX_INTR);
- outb (0x00, ioaddr + TX_START);
- outb (0x03, ioaddr + COL16CNTL);
- dev->trans_start = jiffies;
- lp->tx_started = 0;
- lp->tx_queue_ready = 1;
- lp->rx_started = 0;
- lp->tx_queue = 0;
- lp->tx_queue_len = 0;
- netif_wake_queue(dev);
- }
- static int net_send_packet (struct sk_buff *skb, struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *) dev->priv;
- int ioaddr = dev->base_addr;
- short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
- unsigned char *buf = skb->data;
- netif_stop_queue (dev);
- /* We may not start transmitting unless we finish transferring
- a packet into the Tx queue. During executing the following
- codes we possibly catch a Tx interrupt. Thus we flag off
- tx_queue_ready, so that we prevent the interrupt routine
- (net_interrupt) to start transmitting. */
- lp->tx_queue_ready = 0;
- {
- outw (length, ioaddr + DATAPORT);
- outsw (ioaddr + DATAPORT, buf, (length + 1) >> 1);
- lp->tx_queue++;
- lp->tx_queue_len += length + 2;
- }
- lp->tx_queue_ready = 1;
- 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;
- netif_start_queue (dev);
- } else if (lp->tx_queue_len < 4096 - 1502)
- /* Yes, there is room for one more packet. */
- netif_start_queue (dev);
- dev_kfree_skb (skb);
- 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 net_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;
- }
- ioaddr = dev->base_addr;
- lp = (struct net_local *)dev->priv;
-
- spin_lock (&lp->lock);
-
- 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 (lp->rx_started == 0 &&
- (status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) {
- /* Got a packet(s).
- We cannot execute net_rx more than once at the same time for
- the same device. During executing net_rx, we possibly catch a
- Tx interrupt. Thus we flag on rx_started, so that we prevent
- the interrupt routine (net_interrupt) to dive into net_rx
- again. */
- lp->rx_started = 1;
- outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */
- net_rx(dev);
- outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */
- lp->rx_started = 0;
- }
- if (status & 0x00ff) {
- if (status & 0x02) {
- /* More than 16 collisions occurred */
- if (net_debug > 4)
- printk("%s: 16 Collision occur during Txing.n", dev->name);
- /* Cancel sending a packet. */
- outb(0x03, ioaddr + COL16CNTL);
- lp->stats.collisions++;
- }
- if (status & 0x82) {
- lp->stats.tx_packets++;
- /* The Tx queue has any packets and is not being
- transferred a packet from the host, start
- transmitting. */
- if (lp->tx_queue && lp->tx_queue_ready) {
- outb(0x80 | lp->tx_queue, ioaddr + TX_START);
- lp->tx_queue = 0;
- lp->tx_queue_len = 0;
- dev->trans_start = jiffies;
- netif_wake_queue (dev);
- } else {
- lp->tx_started = 0;
- netif_wake_queue (dev);
- }
- }
- }
- spin_unlock (&lp->lock);
- return;
- }
- /* We have a good packet(s), get it/them out of the buffers. */
- static void
- net_rx(struct net_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);
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- lp->stats.rx_bytes += pkt_len;
- }
- 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 net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int ioaddr = dev->base_addr;
- netif_stop_queue(dev);
- /* Set configuration register 0 to disable Tx and Rx. */
- outb(0xda, ioaddr + CONFIG_0);
- /* No statistic counters on the chip to update. */
- /* Disable the IRQ on boards of fmv18x where it is feasible. */
- if (lp->jumpered) {
- outb(0x00, ioaddr + IOCONFIG1);
- free_irq(dev->irq, dev);
- }
- /* Power-down the chip. Green, green, green! */
- outb(0x00, ioaddr + CONFIG_1);
- 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 net_device_stats *
- net_get_stats(struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- return &lp->stats;
- }
- /*
- Set the multicast/promiscuous mode for this adaptor.
- */
- static void
- set_rx_mode(struct net_device *dev)
- {
- int ioaddr = dev->base_addr;
- struct net_local *lp = (struct net_local *)dev->priv;
- unsigned char mc_filter[8]; /* Multicast hash filter */
- unsigned 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);
- outb(0x02, ioaddr + RX_MODE); /* Use normal mode. */
- }
- 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 struct net_device dev_at1700;
- static int io = 0x260;
- static int irq;
- MODULE_PARM(io, "i");
- MODULE_PARM(irq, "i");
- MODULE_PARM(net_debug, "i");
- MODULE_PARM_DESC(io, "AT1700/FMV18X I/O base address");
- MODULE_PARM_DESC(irq, "AT1700/FMV18X IRQ number");
- MODULE_PARM_DESC(net_debug, "AT1700/FMV18X debug level (0-6)");
- 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;
- dev_at1700.init = at1700_probe;
- if (register_netdev(&dev_at1700) != 0) {
- printk("at1700: register_netdev() returned non-zero.n");
- return -EIO;
- }
- return 0;
- }
- void
- cleanup_module(void)
- {
- #ifdef CONFIG_MCA
- struct net_local *lp = dev_at1700.priv;
- if(lp->mca_slot)
- {
- mca_mark_as_unused(lp->mca_slot);
- }
- #endif
- 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 */
- MODULE_LICENSE("GPL");
- /*
- * 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:
- */