seeq8005.c
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上传日期:2013-02-24
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- /* seeq8005.c: A network driver for linux. */
- /*
- Based on skeleton.c,
- Written 1993-94 by Donald Becker.
- See the skeleton.c file for further copyright information.
- 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 hamish@zot.apana.org.au
- This file is a network device driver for the SEEQ 8005 chipset and
- the Linux operating system.
- */
- static const char version[] =
- "seeq8005.c:v1.00 8/07/95 Hamish Coleman (hamish@zot.apana.org.au)n";
- /*
- Sources:
- SEEQ 8005 databook
-
- Version history:
- 1.00 Public release. cosmetic changes (no warnings now)
- 0.68 Turning per- packet,interrupt debug messages off - testing for release.
- 0.67 timing problems/bad buffer reads seem to be fixed now
- 0.63 *!@$ protocol=eth_type_trans -- now packets flow
- 0.56 Send working
- 0.48 Receive working
- */
- #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/delay.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 "seeq8005.h"
- /* First, a few definitions that the brave might change. */
- /* A zero-terminated list of I/O addresses to be probed. */
- static unsigned int seeq8005_portlist[] __initdata =
- { 0x300, 0x320, 0x340, 0x360, 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;
- /* Information that need to be kept for each board. */
- struct net_local {
- struct net_device_stats stats;
- unsigned short receive_ptr; /* What address in packet memory do we expect a recv_pkt_header? */
- long open_time; /* Useless example local info. */
- };
- /* The station (ethernet) address prefix, used for IDing the board. */
- #define SA_ADDR0 0x00
- #define SA_ADDR1 0x80
- #define SA_ADDR2 0x4b
- /* Index to functions, as function prototypes. */
- extern int seeq8005_probe(struct net_device *dev);
- static int seeq8005_probe1(struct net_device *dev, int ioaddr);
- static int seeq8005_open(struct net_device *dev);
- static void seeq8005_timeout(struct net_device *dev);
- static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev);
- static void seeq8005_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- static void seeq8005_rx(struct net_device *dev);
- static int seeq8005_close(struct net_device *dev);
- static struct net_device_stats *seeq8005_get_stats(struct net_device *dev);
- static void set_multicast_list(struct net_device *dev);
- /* Example routines you must write ;->. */
- #define tx_done(dev) (inw(SEEQ_STATUS) & SEEQSTAT_TX_ON)
- static void hardware_send_packet(struct net_device *dev, char *buf, int length);
- extern void seeq8005_init(struct net_device *dev, int startp);
- static inline void wait_for_buffer(struct net_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.
- */
- int __init
- seeq8005_probe(struct net_device *dev)
- {
- int i;
- int base_addr = dev ? dev->base_addr : 0;
- if (base_addr > 0x1ff) /* Check a single specified location. */
- return seeq8005_probe1(dev, base_addr);
- else if (base_addr != 0) /* Don't probe at all. */
- return -ENXIO;
- for (i = 0; seeq8005_portlist[i]; i++)
- if (seeq8005_probe1(dev, seeq8005_portlist[i]) == 0)
- return 0;
- return -ENODEV;
- }
- /* This is the real probe routine. Linux has a history of friendly device
- probes on the ISA bus. A good device probes avoids doing writes, and
- verifies that the correct device exists and functions. */
- static int __init seeq8005_probe1(struct net_device *dev, int ioaddr)
- {
- static unsigned version_printed;
- int i,j;
- unsigned char SA_prom[32];
- int old_cfg1;
- int old_cfg2;
- int old_stat;
- int old_dmaar;
- int old_rear;
- int retval;
- if (!request_region(ioaddr, SEEQ8005_IO_EXTENT, "seeq8005"))
- return -ENODEV;
- if (net_debug>1)
- printk("seeq8005: probing at 0x%xn",ioaddr);
- old_stat = inw(SEEQ_STATUS); /* read status register */
- if (old_stat == 0xffff) {
- retval = -ENODEV;
- goto out; /* assume that 0xffff == no device */
- }
- if ( (old_stat & 0x1800) != 0x1800 ) { /* assume that unused bits are 1, as my manual says */
- if (net_debug>1) {
- printk("seeq8005: reserved stat bits != 0x1800n");
- printk(" == 0x%04xn",old_stat);
- }
- retval = -ENODEV;
- goto out;
- }
- old_rear = inw(SEEQ_REA);
- if (old_rear == 0xffff) {
- outw(0,SEEQ_REA);
- if (inw(SEEQ_REA) == 0xffff) { /* assume that 0xffff == no device */
- retval = -ENODEV;
- goto out;
- }
- } else if ((old_rear & 0xff00) != 0xff00) { /* assume that unused bits are 1 */
- if (net_debug>1) {
- printk("seeq8005: unused rear bits != 0xff00n");
- printk(" == 0x%04xn",old_rear);
- }
- retval = -ENODEV;
- goto out;
- }
-
- old_cfg2 = inw(SEEQ_CFG2); /* read CFG2 register */
- old_cfg1 = inw(SEEQ_CFG1);
- old_dmaar = inw(SEEQ_DMAAR);
-
- if (net_debug>4) {
- printk("seeq8005: stat = 0x%04xn",old_stat);
- printk("seeq8005: cfg1 = 0x%04xn",old_cfg1);
- printk("seeq8005: cfg2 = 0x%04xn",old_cfg2);
- printk("seeq8005: raer = 0x%04xn",old_rear);
- printk("seeq8005: dmaar= 0x%04xn",old_dmaar);
- }
-
- outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD); /* setup for reading PROM */
- outw( 0, SEEQ_DMAAR); /* set starting PROM address */
- outw( SEEQCFG1_BUFFER_PROM, SEEQ_CFG1); /* set buffer to look at PROM */
- j=0;
- for(i=0; i <32; i++) {
- j+= SA_prom[i] = inw(SEEQ_BUFFER) & 0xff;
- }
- #if 0
- /* untested because I only have the one card */
- if ( (j&0xff) != 0 ) { /* checksum appears to be 8bit = 0 */
- if (net_debug>1) { /* check this before deciding that we have a card */
- printk("seeq8005: prom sum errorn");
- }
- outw( old_stat, SEEQ_STATUS);
- outw( old_dmaar, SEEQ_DMAAR);
- outw( old_cfg1, SEEQ_CFG1);
- retval = -ENODEV;
- goto out;
- }
- #endif
- outw( SEEQCFG2_RESET, SEEQ_CFG2); /* reset the card */
- udelay(5);
- outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
-
- if (net_debug) {
- printk("seeq8005: prom sum = 0x%08xn",j);
- for(j=0; j<32; j+=16) {
- printk("seeq8005: prom %02x: ",j);
- for(i=0;i<16;i++) {
- printk("%02x ",SA_prom[j|i]);
- }
- printk(" ");
- for(i=0;i<16;i++) {
- if ((SA_prom[j|i]>31)&&(SA_prom[j|i]<127)) {
- printk("%c", SA_prom[j|i]);
- } else {
- printk(" ");
- }
- }
- printk("n");
- }
- }
- #if 0
- /*
- * testing the packet buffer memory doesn't work yet
- * but all other buffer accesses do
- * - fixing is not a priority
- */
- if (net_debug>1) { /* test packet buffer memory */
- printk("seeq8005: testing packet buffer ... ");
- outw( SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
- outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
- outw( 0 , SEEQ_DMAAR);
- for(i=0;i<32768;i++) {
- outw(0x5a5a, SEEQ_BUFFER);
- }
- j=jiffies+HZ;
- while ( ((inw(SEEQ_STATUS) & SEEQSTAT_FIFO_EMPTY) != SEEQSTAT_FIFO_EMPTY) && time_before(jiffies, j) )
- mb();
- outw( 0 , SEEQ_DMAAR);
- while ( ((inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, j+HZ))
- mb();
- if ( (inw(SEEQ_STATUS) & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
- outw( SEEQCMD_WINDOW_INT_ACK | (inw(SEEQ_STATUS)& SEEQCMD_INT_MASK), SEEQ_CMD);
- outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
- j=0;
- for(i=0;i<32768;i++) {
- if (inw(SEEQ_BUFFER) != 0x5a5a)
- j++;
- }
- if (j) {
- printk("%in",j);
- } else {
- printk("ok.n");
- }
- }
- #endif
- if (net_debug && version_printed++ == 0)
- printk(version);
- printk("%s: %s found at %#3x, ", dev->name, "seeq8005", ioaddr);
- /* Fill in the 'dev' fields. */
- dev->base_addr = ioaddr;
- /* Retrieve and print the ethernet address. */
- for (i = 0; i < 6; i++)
- printk(" %2.2x", dev->dev_addr[i] = SA_prom[i+6]);
- if (dev->irq == 0xff)
- ; /* Do nothing: a user-level program will set it. */
- else if (dev->irq < 2) { /* "Auto-IRQ" */
- unsigned long cookie = probe_irq_on();
-
- outw( SEEQCMD_RX_INT_EN | SEEQCMD_SET_RX_ON | SEEQCMD_SET_RX_OFF, SEEQ_CMD );
- dev->irq = probe_irq_off(cookie);
-
- if (net_debug >= 2)
- printk(" autoirq is %dn", dev->irq);
- } else if (dev->irq == 2)
- /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
- * or don't know which one to set.
- */
- dev->irq = 9;
- #if 0
- {
- int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
- if (irqval) {
- printk ("%s: unable to get IRQ %d (irqval=%d).n", dev->name,
- dev->irq, irqval);
- retval = -EAGAIN;
- goto out;
- }
- }
- #endif
- /* 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 = seeq8005_open;
- dev->stop = seeq8005_close;
- dev->hard_start_xmit = seeq8005_send_packet;
- dev->tx_timeout = seeq8005_timeout;
- dev->watchdog_timeo = HZ/20;
- dev->get_stats = seeq8005_get_stats;
- dev->set_multicast_list = set_multicast_list;
- /* Fill in the fields of the device structure with ethernet values. */
- ether_setup(dev);
-
- dev->flags &= ~IFF_MULTICAST;
- return 0;
- out:
- release_region(ioaddr, SEEQ8005_IO_EXTENT);
- return retval;
- }
- /* 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 seeq8005_open(struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- {
- int irqval = request_irq(dev->irq, &seeq8005_interrupt, 0, "seeq8005", dev);
- if (irqval) {
- printk ("%s: unable to get IRQ %d (irqval=%d).n", dev->name,
- dev->irq, irqval);
- return -EAGAIN;
- }
- }
- /* Reset the hardware here. Don't forget to set the station address. */
- seeq8005_init(dev, 1);
- lp->open_time = jiffies;
- netif_start_queue(dev);
- return 0;
- }
- static void seeq8005_timeout(struct net_device *dev)
- {
- int ioaddr = dev->base_addr;
- printk(KERN_WARNING "%s: transmit timed out, %s?n", dev->name,
- tx_done(dev) ? "IRQ conflict" : "network cable problem");
- /* Try to restart the adaptor. */
- seeq8005_init(dev, 1);
- dev->trans_start = jiffies;
- netif_wake_queue(dev);
- }
- static int seeq8005_send_packet(struct sk_buff *skb, struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
- unsigned char *buf = skb->data;
- /* Block a timer-based transmit from overlapping */
- netif_stop_queue(dev);
-
- hardware_send_packet(dev, buf, length);
- dev->trans_start = jiffies;
- lp->stats.tx_bytes += length;
- dev_kfree_skb (skb);
- /* You might need to clean up and record Tx statistics here. */
- return 0;
- }
- /* The typical workload of the driver:
- Handle the network interface interrupts. */
- static void seeq8005_interrupt(int irq, void *dev_id, struct pt_regs * regs)
- {
- struct net_device *dev = dev_id;
- struct net_local *lp;
- int ioaddr, status, boguscount = 0;
- ioaddr = dev->base_addr;
- lp = (struct net_local *)dev->priv;
- status = inw(SEEQ_STATUS);
- do {
- if (net_debug >2) {
- printk("%s: int, status=0x%04xn",dev->name,status);
- }
-
- if (status & SEEQSTAT_WINDOW_INT) {
- outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- if (net_debug) {
- printk("%s: window int!n",dev->name);
- }
- }
- if (status & SEEQSTAT_TX_INT) {
- outw( SEEQCMD_TX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- lp->stats.tx_packets++;
- netif_wake_queue(dev); /* Inform upper layers. */
- }
- if (status & SEEQSTAT_RX_INT) {
- /* Got a packet(s). */
- seeq8005_rx(dev);
- }
- status = inw(SEEQ_STATUS);
- } while ( (++boguscount < 10) && (status & SEEQSTAT_ANY_INT)) ;
- if(net_debug>2) {
- printk("%s: eoin",dev->name);
- }
- }
- /* We have a good packet(s), get it/them out of the buffers. */
- static void seeq8005_rx(struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int boguscount = 10;
- int pkt_hdr;
- int ioaddr = dev->base_addr;
- do {
- int next_packet;
- int pkt_len;
- int i;
- int status;
- status = inw(SEEQ_STATUS);
- outw( lp->receive_ptr, SEEQ_DMAAR);
- outw(SEEQCMD_FIFO_READ | SEEQCMD_RX_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- wait_for_buffer(dev);
- next_packet = ntohs(inw(SEEQ_BUFFER));
- pkt_hdr = inw(SEEQ_BUFFER);
-
- if (net_debug>2) {
- printk("%s: 0x%04x recv next=0x%04x, hdr=0x%04xn",dev->name,lp->receive_ptr,next_packet,pkt_hdr);
- }
-
- if ((next_packet == 0) || ((pkt_hdr & SEEQPKTH_CHAIN)==0)) { /* Read all the frames? */
- return; /* Done for now */
- }
-
- if ((pkt_hdr & SEEQPKTS_DONE)==0)
- break;
-
- if (next_packet < lp->receive_ptr) {
- pkt_len = (next_packet + 0x10000 - ((DEFAULT_TEA+1)<<8)) - lp->receive_ptr - 4;
- } else {
- pkt_len = next_packet - lp->receive_ptr - 4;
- }
-
- if (next_packet < ((DEFAULT_TEA+1)<<8)) { /* is the next_packet address sane? */
- printk("%s: recv packet ring corrupt, resetting boardn",dev->name);
- seeq8005_init(dev,1);
- return;
- }
-
- lp->receive_ptr = next_packet;
-
- if (net_debug>2) {
- printk("%s: recv len=0x%04xn",dev->name,pkt_len);
- }
- if (pkt_hdr & SEEQPKTS_ANY_ERROR) { /* There was an error. */
- lp->stats.rx_errors++;
- if (pkt_hdr & SEEQPKTS_SHORT) lp->stats.rx_frame_errors++;
- if (pkt_hdr & SEEQPKTS_DRIB) lp->stats.rx_frame_errors++;
- if (pkt_hdr & SEEQPKTS_OVERSIZE) lp->stats.rx_over_errors++;
- if (pkt_hdr & SEEQPKTS_CRC_ERR) lp->stats.rx_crc_errors++;
- /* skip over this packet */
- outw( SEEQCMD_FIFO_WRITE | SEEQCMD_DMA_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- outw( (lp->receive_ptr & 0xff00)>>8, SEEQ_REA);
- } else {
- /* Malloc up new buffer. */
- struct sk_buff *skb;
- unsigned char *buf;
- skb = dev_alloc_skb(pkt_len);
- if (skb == NULL) {
- printk("%s: Memory squeeze, dropping packet.n", dev->name);
- lp->stats.rx_dropped++;
- break;
- }
- skb->dev = dev;
- skb_reserve(skb, 2); /* align data on 16 byte */
- buf = skb_put(skb,pkt_len);
-
- insw(SEEQ_BUFFER, buf, (pkt_len + 1) >> 1);
-
- if (net_debug>2) {
- char * p = buf;
- printk("%s: recv ",dev->name);
- for(i=0;i<14;i++) {
- printk("%02x ",*(p++)&0xff);
- }
- printk("n");
- }
- skb->protocol=eth_type_trans(skb,dev);
- netif_rx(skb);
- dev->last_rx = jiffies;
- lp->stats.rx_packets++;
- lp->stats.rx_bytes += pkt_len;
- }
- } while ((--boguscount) && (pkt_hdr & SEEQPKTH_CHAIN));
- /* If any worth-while packets have been received, netif_rx()
- has done a mark_bh(NET_BH) for us and will work on them
- when we get to the bottom-half routine. */
- return;
- }
- /* The inverse routine to net_open(). */
- static int seeq8005_close(struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int ioaddr = dev->base_addr;
- lp->open_time = 0;
- netif_stop_queue(dev);
-
- /* Flush the Tx and disable Rx here. */
- outw( SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
- free_irq(dev->irq, dev);
- /* Update the statistics here. */
- return 0;
- }
- /* Get the current statistics. This may be called with the card open or
- closed. */
- static struct net_device_stats *seeq8005_get_stats(struct net_device *dev)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- return &lp->stats;
- }
- /* Set or clear the multicast filter for this adaptor.
- num_addrs == -1 Promiscuous mode, receive all packets
- num_addrs == 0 Normal mode, clear multicast list
- num_addrs > 0 Multicast mode, receive normal and MC packets, and do
- best-effort filtering.
- */
- static void set_multicast_list(struct net_device *dev)
- {
- /*
- * I _could_ do up to 6 addresses here, but won't (yet?)
- */
- #if 0
- int ioaddr = dev->base_addr;
- /*
- * hmm, not even sure if my matching works _anyway_ - seem to be receiving
- * _everything_ . . .
- */
-
- if (num_addrs) { /* Enable promiscuous mode */
- outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_ALL, SEEQ_CFG1);
- dev->flags|=IFF_PROMISC;
- } else { /* Disable promiscuous mode, use normal mode */
- outw( (inw(SEEQ_CFG1) & ~SEEQCFG1_MATCH_MASK)| SEEQCFG1_MATCH_BROAD, SEEQ_CFG1);
- }
- #endif
- }
- void seeq8005_init(struct net_device *dev, int startp)
- {
- struct net_local *lp = (struct net_local *)dev->priv;
- int ioaddr = dev->base_addr;
- int i;
-
- outw(SEEQCFG2_RESET, SEEQ_CFG2); /* reset device */
- udelay(5);
-
- outw( SEEQCMD_FIFO_WRITE | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
- outw( 0, SEEQ_DMAAR); /* load start address into both low and high byte */
- /* wait_for_buffer(dev); */ /* I think that you only need a wait for memory buffer */
- outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);
-
- for(i=0;i<6;i++) { /* set Station address */
- outb(dev->dev_addr[i], SEEQ_BUFFER);
- udelay(2);
- }
-
- outw( SEEQCFG1_BUFFER_TEA, SEEQ_CFG1); /* set xmit end area pointer to 16K */
- outb( DEFAULT_TEA, SEEQ_BUFFER); /* this gives us 16K of send buffer and 48K of recv buffer */
-
- lp->receive_ptr = (DEFAULT_TEA+1)<<8; /* so we can find our packet_header */
- outw( lp->receive_ptr, SEEQ_RPR); /* Receive Pointer Register is set to recv buffer memory */
-
- outw( 0x00ff, SEEQ_REA); /* Receive Area End */
- if (net_debug>4) {
- printk("%s: SA0 = ",dev->name);
- outw( SEEQCMD_FIFO_READ | SEEQCMD_SET_ALL_OFF, SEEQ_CMD);
- outw( 0, SEEQ_DMAAR);
- outw( SEEQCFG1_BUFFER_MAC0, SEEQ_CFG1);
-
- for(i=0;i<6;i++) {
- printk("%02x ",inb(SEEQ_BUFFER));
- }
- printk("n");
- }
-
- outw( SEEQCFG1_MAC0_EN | SEEQCFG1_MATCH_BROAD | SEEQCFG1_BUFFER_BUFFER, SEEQ_CFG1);
- outw( SEEQCFG2_AUTO_REA | SEEQCFG2_CTRLO, SEEQ_CFG2);
- outw( SEEQCMD_SET_RX_ON | SEEQCMD_TX_INT_EN | SEEQCMD_RX_INT_EN, SEEQ_CMD);
- if (net_debug>4) {
- int old_cfg1;
- old_cfg1 = inw(SEEQ_CFG1);
- printk("%s: stat = 0x%04xn",dev->name,inw(SEEQ_STATUS));
- printk("%s: cfg1 = 0x%04xn",dev->name,old_cfg1);
- printk("%s: cfg2 = 0x%04xn",dev->name,inw(SEEQ_CFG2));
- printk("%s: raer = 0x%04xn",dev->name,inw(SEEQ_REA));
- printk("%s: dmaar= 0x%04xn",dev->name,inw(SEEQ_DMAAR));
-
- }
- }
- static void hardware_send_packet(struct net_device * dev, char *buf, int length)
- {
- int ioaddr = dev->base_addr;
- int status = inw(SEEQ_STATUS);
- int transmit_ptr = 0;
- int tmp;
- if (net_debug>4) {
- printk("%s: send 0x%04xn",dev->name,length);
- }
-
- /* Set FIFO to writemode and set packet-buffer address */
- outw( SEEQCMD_FIFO_WRITE | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- outw( transmit_ptr, SEEQ_DMAAR);
-
- /* output SEEQ Packet header barfage */
- outw( htons(length + 4), SEEQ_BUFFER);
- outw( SEEQPKTH_XMIT | SEEQPKTH_DATA_FOLLOWS | SEEQPKTH_XMIT_INT_EN, SEEQ_BUFFER );
-
- /* blat the buffer */
- outsw( SEEQ_BUFFER, buf, (length +1) >> 1);
- /* paranoia !! */
- outw( 0, SEEQ_BUFFER);
- outw( 0, SEEQ_BUFFER);
-
- /* set address of start of transmit chain */
- outw( transmit_ptr, SEEQ_TPR);
-
- /* drain FIFO */
- tmp = jiffies;
- while ( (((status=inw(SEEQ_STATUS)) & SEEQSTAT_FIFO_EMPTY) == 0) && (jiffies - tmp < HZ))
- mb();
-
- /* doit ! */
- outw( SEEQCMD_WINDOW_INT_ACK | SEEQCMD_SET_TX_ON | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
-
- }
- /*
- * wait_for_buffer
- *
- * This routine waits for the SEEQ chip to assert that the FIFO is ready
- * by checking for a window interrupt, and then clearing it
- */
- inline void wait_for_buffer(struct net_device * dev)
- {
- int ioaddr = dev->base_addr;
- int tmp;
- int status;
-
- tmp = jiffies + HZ;
- while ( ( ((status=inw(SEEQ_STATUS)) & SEEQSTAT_WINDOW_INT) != SEEQSTAT_WINDOW_INT) && time_before(jiffies, tmp))
- mb();
-
- if ( (status & SEEQSTAT_WINDOW_INT) == SEEQSTAT_WINDOW_INT)
- outw( SEEQCMD_WINDOW_INT_ACK | (status & SEEQCMD_INT_MASK), SEEQ_CMD);
- }
-
- #ifdef MODULE
- static struct net_device dev_seeq = { init: seeq8005_probe };
- static int io = 0x320;
- static int irq = 10;
- MODULE_LICENSE("GPL");
- MODULE_PARM(io, "i");
- MODULE_PARM(irq, "i");
- MODULE_PARM_DESC(io, "SEEQ 8005 I/O base address");
- MODULE_PARM_DESC(irq, "SEEQ 8005 IRQ number");
- int init_module(void)
- {
- dev_seeq.irq=irq;
- dev_seeq.base_addr=io;
- if (register_netdev(&dev_seeq) != 0)
- return -EIO;
- return 0;
- }
- void cleanup_module(void)
- {
- /*
- * No need to check MOD_IN_USE, as sys_delete_module() checks.
- */
- unregister_netdev(&dev_seeq);
- /*
- * Free up the private structure, or leak memory :-)
- */
- kfree(dev_seeq.priv);
- dev_seeq.priv = NULL; /* gets re-allocated by el1_probe1 */
- /*
- * If we don't do this, we can't re-insmod it later.
- */
- release_region(dev_seeq.base_addr, SEEQ8005_IO_EXTENT);
- }
- #endif /* MODULE */
- /*
- * Local variables:
- * compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c skeleton.c"
- * version-control: t
- * kept-new-versions: 5
- * tab-width: 4
- * End:
- */