patch-2.3.36 linux/drivers/net/com90io.c
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- Lines: 959
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.35/linux/drivers/net/com90io.c
- Orig date:
Wed Aug 18 11:36:41 1999
diff -u --recursive --new-file v2.3.35/linux/drivers/net/com90io.c linux/drivers/net/com90io.c
@@ -1,958 +0,0 @@
-/* $Id: com90io.c,v 1.6 1997/11/09 11:04:59 mj Exp $
-
- Written 1997 by David Woodhouse <dwmw2@cam.ac.uk>
-
- Derived from the original arcnet.c,
- Written 1994-1996 by Avery Pennarun,
- which was in turn derived from skeleton.c by Donald Becker.
-
- **********************
-
- The original copyright of skeleton.c was as follows:
-
- skeleton.c Written 1993 by Donald Becker.
- Copyright 1993 United States Government as represented by the
- Director, National Security Agency. This software may only be used
- and distributed according to the terms of the GNU Public License as
- modified by SRC, incorporated herein by reference.
-
- **********************
-
- For more details, see drivers/net/arcnet.c
-
- **********************
-*/
-
-
-#include <linux/module.h>
-#include <linux/version.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 <linux/timer.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/init.h>
-#include <linux/if_arcnet.h>
-#include <linux/arcdevice.h>
-
-#include <asm/system.h>
-#include <asm/bitops.h>
-#include <asm/io.h>
-#include <asm/dma.h>
-
-#include <net/arp.h>
-
-
-/* Internal function declarations */
-
-static int arc90io_probe(struct net_device *dev);
-static void arc90io_rx(struct net_device *dev,int recbuf);
-static int arc90io_found(struct net_device *dev,int ioaddr,int airq);
-static void arc90io_inthandler (struct net_device *dev);
-static int arc90io_reset (struct net_device *dev, int reset_delay);
-static void arc90io_setmask (struct net_device *dev, u_char mask);
-static void arc90io_command (struct net_device *dev, u_char command);
-static u_char arc90io_status (struct net_device *dev);
-static void arc90io_prepare_tx(struct net_device *dev,u_char *hdr,int hdrlen,
- char *data,int length,int daddr,int exceptA, int offset);
-static void arc90io_openclose(int open);
-
-static u_char get_buffer_byte (struct net_device *dev, unsigned offset);
-static void put_buffer_byte (struct net_device *dev, unsigned offset, u_char datum);
-static void get_whole_buffer (struct net_device *dev, unsigned offset, unsigned length, char *dest);
-static void put_whole_buffer (struct net_device *dev, unsigned offset, unsigned length, char *dest);
-
-
-/* Module parameters */
-
-#ifdef MODULE
-static int io=0x0; /* <--- EDIT THESE LINES FOR YOUR CONFIGURATION */
-static int irq=0; /* or use the insmod io= irq= shmem= options */
-static char *device; /* use eg. device="arc1" to change name */
-
-MODULE_PARM(io, "i");
-MODULE_PARM(irq, "i");
-MODULE_PARM(device, "s");
-#else
-void __init com90io_setup (char *str, int *ints);
-extern struct net_device arcnet_devs[];
-extern char arcnet_dev_names[][10];
-extern int arcnet_num_devs;
-#endif
-
-
-/* Handy defines for ARCnet specific stuff */
-
-/* The number of low I/O ports used by the card. */
-#define ARCNET_TOTAL_SIZE 16
-
-/* COM 9026 controller chip --> ARCnet register addresses */
-#define _INTMASK (ioaddr+0) /* writable */
-#define _STATUS (ioaddr+0) /* readable */
-#define _COMMAND (ioaddr+1) /* writable, returns random vals on read (?) */
-#define _RESET (ioaddr+8) /* software reset (on read) */
-#define _MEMDATA (ioaddr+12) /* Data port for IO-mapped memory */
-#define _ADDR_HI (ioaddr+15) /* Control registers for said */
-#define _ADDR_LO (ioaddr+14)
-#define _CONFIG (ioaddr+2) /* Configuration register */
-
-#define ARCSTATUS inb(_STATUS)
-#define ACOMMAND(cmd) outb((cmd),_COMMAND)
-#define AINTMASK(msk) outb((msk),_INTMASK)
-
-#define ARCRESET inb(_RESET)
-
-#define SETCONF outb((lp->config),_CONFIG)
-
-
-/****************************************************************************
- * *
- * IO-mapped operation routines *
- * *
- ****************************************************************************/
-
-u_char get_buffer_byte (struct net_device *dev, unsigned offset)
-{
- int ioaddr=dev->base_addr;
-
- outb(offset >> 8, _ADDR_HI);
- outb(offset & 0xff, _ADDR_LO);
-
- return inb(_MEMDATA);
-}
-
-void put_buffer_byte (struct net_device *dev, unsigned offset, u_char datum)
-{
- int ioaddr=dev->base_addr;
-
- outb(offset >> 8, _ADDR_HI);
- outb(offset & 0xff, _ADDR_LO);
-
- outb(datum, _MEMDATA);
-}
-
-
-#undef ONE_AT_A_TIME_TX
-#undef ONE_AT_A_TIME_RX
-
-void get_whole_buffer (struct net_device *dev, unsigned offset, unsigned length, char *dest)
-{
- int ioaddr=dev->base_addr;
-
- outb( (offset >> 8) | AUTOINCflag, _ADDR_HI);
- outb( offset & 0xff, _ADDR_LO);
-
- while (length--)
-#ifdef ONE_AT_A_TIME_RX
- *(dest++) = get_buffer_byte(dev,offset++);
-#else
- *(dest++) = inb (_MEMDATA);
-#endif
-}
-
-void put_whole_buffer (struct net_device *dev, unsigned offset, unsigned length, char *dest)
-{
- int ioaddr=dev->base_addr;
-
- outb( (offset >> 8) | AUTOINCflag, _ADDR_HI);
- outb( offset & 0xff, _ADDR_LO);
-
- while (length--)
-#ifdef ONE_AT_A_TIME_TX
- put_buffer_byte(dev,offset++,*(dest++));
-#else
- outb (*(dest++), _MEMDATA);
-#endif
-}
-
-
-static const char *version =
- "com90io.c: v3.00 97/11/09 Avery Pennarun <apenwarr@worldvisions.ca> et al.\n";
-
-
-/****************************************************************************
- * *
- * Probe and initialization *
- * *
- ****************************************************************************/
-
-/* We cannot probe for an IO mapped card either, although we can check that
- * it's where we were told it was, and even autoirq
- */
-
-int __init arc90io_probe(struct net_device *dev)
-{
- int ioaddr=dev->base_addr,status,delayval;
- unsigned long airqmask;
-
- BUGLVL(D_NORMAL) printk(version);
-
- if (ioaddr<0x200)
- {
- BUGMSG(D_NORMAL,"No autoprobe for IO mapped cards; you "
- "must specify the base address!\n");
- return -ENODEV;
- }
-
- if (check_region(ioaddr, ARCNET_TOTAL_SIZE))
- {
- BUGMSG(D_INIT_REASONS,"IO check_region %x-%x failed.\n",
- ioaddr,ioaddr+ARCNET_TOTAL_SIZE-1);
- return -ENXIO;
- }
-
- if (ARCSTATUS == 0xFF)
- {
- BUGMSG(D_INIT_REASONS,"IO address %x empty\n",ioaddr);
- return -ENODEV;
- }
-
- ARCRESET;
- JIFFER(RESETtime);
-
- status=ARCSTATUS;
-
- if ((status & 0x9D)
- != (NORXflag|RECONflag|TXFREEflag|RESETflag))
- {
- BUGMSG(D_INIT_REASONS,"Status invalid (%Xh).\n",status);
- return -ENODEV;
- }
-
- BUGMSG(D_INIT_REASONS,"Status after reset: %X\n",status);
-
- ACOMMAND(CFLAGScmd|RESETclear|CONFIGclear);
-
- BUGMSG(D_INIT_REASONS,"Status after reset acknowledged: %X\n",status);
-
- status=ARCSTATUS;
-
- if (status & RESETflag)
- {
- BUGMSG(D_INIT_REASONS,"Eternal reset (status=%Xh)\n",status);
- return -ENODEV;
- }
-
- outb((0x16 | IOMAPflag) &~ENABLE16flag, _CONFIG);
-
- /* Read first loc'n of memory */
-
- outb(AUTOINCflag ,_ADDR_HI);
- outb(0,_ADDR_LO);
-
- if ((status=inb(_MEMDATA)) != 0xd1)
- {
- BUGMSG(D_INIT_REASONS,"Signature byte not found"
- " (%Xh instead).\n", status);
- return -ENODEV;
- }
-
- if (!dev->irq)
- {
- /* if we do this, we're sure to get an IRQ since the
- * card has just reset and the NORXflag is on until
- * we tell it to start receiving.
- */
-
- airqmask = probe_irq_on();
- outb(NORXflag,_INTMASK);
- udelay(1);
- outb(0,_INTMASK);
- dev->irq = probe_irq_off(airqmask);
-
- if (dev->irq<=0)
- {
- BUGMSG(D_INIT_REASONS,"Autoprobe IRQ failed\n");
- return -ENODEV;
- }
- }
-
- return arc90io_found(dev,dev->base_addr,dev->irq);
-}
-
-
-/* Set up the struct net_device associated with this card. Called after
- * probing succeeds.
- */
-int __init arc90io_found(struct net_device *dev,int ioaddr,int airq)
-{
- struct arcnet_local *lp;
-
- /* reserve the irq */
- if (request_irq(airq,&arcnet_interrupt,0,"arcnet (COM90xx-IO)",dev))
- {
- BUGMSG(D_NORMAL,"Can't get IRQ %d!\n",airq);
- return -ENODEV;
- }
- dev->irq=airq;
-
- /* reserve the I/O region - guaranteed to work by check_region */
- request_region(ioaddr,ARCNET_TOTAL_SIZE,"arcnet (COM90xx-IO)");
- dev->base_addr=ioaddr;
-
- dev->mem_start=dev->mem_end=dev->rmem_start=dev->rmem_end=(long)NULL;
-
- /* Initialize the rest of the device structure. */
-
- dev->priv = kmalloc(sizeof(struct arcnet_local), GFP_KERNEL);
- if (dev->priv == NULL)
- {
- free_irq(airq,dev);
- release_region(ioaddr,ARCNET_TOTAL_SIZE);
- return -ENOMEM;
- }
-
- memset(dev->priv,0,sizeof(struct arcnet_local));
- lp=(struct arcnet_local *)(dev->priv);
- lp->card_type = ARC_90xx_IO;
- lp->card_type_str = "COM 90xx (IO)";
-
- lp->arcnet_reset=arc90io_reset;
- lp->asetmask=arc90io_setmask;
- lp->astatus=arc90io_status;
- lp->acommand=arc90io_command;
- lp->openclose_device=arc90io_openclose;
- lp->prepare_tx=arc90io_prepare_tx;
- lp->inthandler=arc90io_inthandler;
-
- /* Fill in the fields of the device structure with generic
- * values.
- */
- arcnet_setup(dev);
-
- /* And now fill particular fields with arcnet values */
- dev->mtu=1500; /* completely arbitrary - agrees with ether, though */
- dev->hard_header_len=sizeof(struct ClientData);
- lp->sequence=1;
- lp->recbuf=0;
-
- BUGMSG(D_DURING,"ClientData header size is %d.\n",
- sizeof(struct ClientData));
- BUGMSG(D_DURING,"HardHeader size is %d.\n",
- sizeof(struct archdr));
-
- lp->config = (0x16 | IOMAPflag) & ~ENABLE16flag;
- SETCONF;
-
- /* get and check the station ID from offset 1 in shmem */
-
- lp->stationid = get_buffer_byte(dev,1);
-
- if (!lp->stationid)
- BUGMSG(D_NORMAL,"WARNING! Station address 00 is reserved "
- "for broadcasts!\n");
- else if (lp->stationid==255)
- BUGMSG(D_NORMAL,"WARNING! Station address FF may confuse "
- "DOS networking programs!\n");
- dev->dev_addr[0]=lp->stationid;
-
- BUGMSG(D_NORMAL,"ARCnet COM90xx in IO-mapped mode: "
- "station %02Xh found at %03lXh, IRQ %d.\n",
- lp->stationid,
- dev->base_addr,dev->irq);
-
- return 0;
-}
-
-
-/****************************************************************************
- * *
- * Utility routines *
- * *
- ****************************************************************************/
-
-/* Do a hardware reset on the card, and set up necessary registers.
- *
- * This should be called as little as possible, because it disrupts the
- * token on the network (causes a RECON) and requires a significant delay.
- *
- * However, it does make sure the card is in a defined state.
- */
-int arc90io_reset(struct net_device *dev,int reset_delay)
-{
- struct arcnet_local *lp=(struct arcnet_local *)dev->priv;
- short ioaddr=dev->base_addr;
- int delayval,recbuf=lp->recbuf;
-
- if (reset_delay==3)
- {
- ARCRESET;
- return 0;
- }
-
- /* no IRQ's, please! */
- lp->intmask=0;
- SETMASK;
-
- BUGMSG(D_INIT,"Resetting %s (status=%Xh)\n",
- dev->name,ARCSTATUS);
-
- /* Set the thing to IO-mapped, 8-bit mode */
- lp->config = (0x1C|IOMAPflag) & ~ENABLE16flag;
- SETCONF;
-
- if (reset_delay)
- {
- /* reset the card */
- ARCRESET;
- JIFFER(RESETtime);
- }
-
- ACOMMAND(CFLAGScmd|RESETclear); /* clear flags & end reset */
- ACOMMAND(CFLAGScmd|CONFIGclear);
-
- /* verify that the ARCnet signature byte is present */
-
- if (get_buffer_byte(dev,0) != TESTvalue)
- {
- BUGMSG(D_NORMAL,"reset failed: TESTvalue not present.\n");
- return 1;
- }
-
- /* clear out status variables */
- recbuf=lp->recbuf=0;
- lp->txbuf=2;
-
- /* enable extended (512-byte) packets */
- ACOMMAND(CONFIGcmd|EXTconf);
-
- /* and enable receive of our first packet to the first buffer */
- EnableReceiver();
-
- /* re-enable interrupts */
- lp->intmask|=NORXflag;
-#ifdef DETECT_RECONFIGS
- lp->intmask|=RECONflag;
-#endif
- SETMASK;
-
- /* done! return success. */
- return 0;
-}
-
-
-static void arc90io_openclose(int open)
-{
- if (open)
- MOD_INC_USE_COUNT;
- else
- MOD_DEC_USE_COUNT;
-}
-
-
-static void arc90io_setmask(struct net_device *dev, u_char mask)
-{
- short ioaddr=dev->base_addr;
-
- AINTMASK(mask);
-}
-
-static u_char arc90io_status(struct net_device *dev)
-{
- short ioaddr=dev->base_addr;
-
- return ARCSTATUS;
-}
-
-static void arc90io_command(struct net_device *dev, u_char cmd)
-{
- short ioaddr=dev->base_addr;
-
- ACOMMAND(cmd);
-}
-
-
-/* The actual interrupt handler routine - handle various IRQ's generated
- * by the card.
- */
-static void
-arc90io_inthandler(struct net_device *dev)
-{
- struct arcnet_local *lp=(struct arcnet_local *)dev->priv;
- int ioaddr=dev->base_addr, status, boguscount = 3, didsomething;
-
- AINTMASK(0);
-
- BUGMSG(D_DURING,"in arc90io_inthandler (status=%Xh, intmask=%Xh)\n",
- ARCSTATUS,lp->intmask);
-
- do
- {
- status = ARCSTATUS;
- didsomething=0;
-
- /* RESET flag was enabled - card is resetting and if RX
- * is disabled, it's NOT because we just got a packet.
- */
- if (status & RESETflag)
- {
- BUGMSG(D_NORMAL,"spurious reset (status=%Xh)\n",
- status);
- arc90io_reset(dev,0);
-
- /* all other flag values are just garbage */
- break;
- }
-
- /* RX is inhibited - we must have received something. */
- if (status & lp->intmask & NORXflag)
- {
- int recbuf=lp->recbuf=!lp->recbuf;
- int oldaddr=0;
-
- BUGMSG(D_DURING,"receive irq (status=%Xh)\n",
- status);
-
- /* enable receive of our next packet */
- EnableReceiver();
-
- if (lp->intx)
- oldaddr=(inb(_ADDR_HI)<<8) | inb(_ADDR_LO);
-
-
- /* Got a packet. */
- arc90io_rx(dev,!recbuf);
-
-
- if (lp->intx)
- {
- outb( (oldaddr >> 8), _ADDR_HI);
- outb( oldaddr & 0xff, _ADDR_LO);
- }
-
- didsomething++;
- }
-
- /* it can only be an xmit-done irq if we're xmitting :) */
- /*if (status&TXFREEflag && !lp->in_txhandler && lp->sending)*/
- if (status & lp->intmask & TXFREEflag)
- {
- struct Outgoing *out=&(lp->outgoing);
- int was_sending=lp->sending;
-
- lp->intmask &= ~TXFREEflag;
-
- lp->in_txhandler++;
- if (was_sending) lp->sending--;
-
- BUGMSG(D_DURING,"TX IRQ (stat=%Xh, numsegs=%d, segnum=%d, skb=%ph)\n",
- status,out->numsegs,out->segnum,out->skb);
-
- if (was_sending && !(status&TXACKflag))
- {
- if (lp->lasttrans_dest != 0)
- {
- BUGMSG(D_EXTRA,"transmit was not acknowledged! (status=%Xh, dest=%02Xh)\n",
- status,lp->lasttrans_dest);
- lp->stats.tx_errors++;
- lp->stats.tx_carrier_errors++;
- }
- else
- {
- BUGMSG(D_DURING,"broadcast was not acknowledged; that's normal (status=%Xh, dest=%02Xh)\n",
- status,
- lp->lasttrans_dest);
- }
- }
-
- /* send packet if there is one */
- arcnet_go_tx(dev,0);
- didsomething++;
-
- if (lp->intx)
- {
- BUGMSG(D_DURING,"TXDONE while intx! (status=%Xh, intx=%d)\n",
- ARCSTATUS,lp->intx);
- lp->in_txhandler--;
- continue;
- }
-
- if (!lp->outgoing.skb)
- {
- BUGMSG(D_DURING,"TX IRQ done: no split to continue.\n");
-
- /* inform upper layers */
- if (!lp->txready) arcnet_tx_done(dev, lp);
- lp->in_txhandler--;
- continue;
- }
-
- /* if more than one segment, and not all segments
- * are done, then continue xmit.
- */
- if (out->segnum<out->numsegs)
- arcnetA_continue_tx(dev);
- arcnet_go_tx(dev,0);
-
- /* if segnum==numsegs, the transmission is finished;
- * free the skb.
- */
- if (out->segnum>=out->numsegs)
- {
- /* transmit completed */
- out->segnum++;
- if (out->skb)
- {
- lp->stats.tx_bytes += out->skb->len;
- dev_kfree_skb(out->skb);
- }
- out->skb=NULL;
-
- /* inform upper layers */
- if (!lp->txready) arcnet_tx_done(dev, lp);
- }
- didsomething++;
-
- lp->in_txhandler--;
- }
- else if (lp->txready && !lp->sending && !lp->intx)
- {
- BUGMSG(D_NORMAL,"recovery from silent TX (status=%Xh)\n",
- status);
- arcnet_go_tx(dev,0);
- didsomething++;
- }
-
-#ifdef DETECT_RECONFIGS
- if (status & (lp->intmask) & RECONflag)
- {
- ACOMMAND(CFLAGScmd|CONFIGclear);
- lp->stats.tx_carrier_errors++;
-
-#ifdef SHOW_RECONFIGS
- BUGMSG(D_NORMAL,"Network reconfiguration detected"
- " (status=%Xh, config=%X)\n",
- status,lp->config);
-#endif /* SHOW_RECONFIGS */
-
-#ifdef RECON_THRESHOLD
- /* is the RECON info empty or old? */
- if (!lp->first_recon || !lp->last_recon ||
- jiffies-lp->last_recon > HZ*10)
- {
- if (lp->network_down)
- BUGMSG(D_NORMAL,"reconfiguration detected: cabling restored?\n");
- lp->first_recon=lp->last_recon=jiffies;
- lp->num_recons=lp->network_down=0;
-
- BUGMSG(D_DURING,"recon: clearing counters.\n");
- }
- else /* add to current RECON counter */
- {
- lp->last_recon=jiffies;
- lp->num_recons++;
-
- BUGMSG(D_DURING,"recon: counter=%d, time=%lds, net=%d\n",
- lp->num_recons,
- (lp->last_recon-lp->first_recon)/HZ,
- lp->network_down);
-
- /* if network is marked up;
- * and first_recon and last_recon are 60+ sec
- * apart;
- * and the average no. of recons counted is
- * > RECON_THRESHOLD/min;
- * then print a warning message.
- */
- if (!lp->network_down
- && (lp->last_recon-lp->first_recon)<=HZ*60
- && lp->num_recons >= RECON_THRESHOLD)
- {
- lp->network_down=1;
- BUGMSG(D_NORMAL,"many reconfigurations detected: cabling problem?\n");
- }
- else if (!lp->network_down
- && lp->last_recon-lp->first_recon > HZ*60)
- {
- /* reset counters if we've gone for
- * over a minute.
- */
- lp->first_recon=lp->last_recon;
- lp->num_recons=1;
- }
- }
- }
- else if (lp->network_down && jiffies-lp->last_recon > HZ*10)
- {
- if (lp->network_down)
- BUGMSG(D_NORMAL,"cabling restored?\n");
- lp->first_recon=lp->last_recon=0;
- lp->num_recons=lp->network_down=0;
-
- BUGMSG(D_DURING,"not recon: clearing counters anyway.\n");
-#endif
- }
-#endif /* DETECT_RECONFIGS */
- } while (--boguscount && didsomething);
-
- BUGMSG(D_DURING,"net_interrupt complete (status=%Xh, count=%d)\n",
- ARCSTATUS,boguscount);
- BUGMSG(D_DURING,"\n");
-
- SETMASK; /* put back interrupt mask */
-}
-
-
-/* A packet has arrived; grab it from the buffers and pass it to the generic
- * arcnet_rx routing to deal with it.
- */
-
-static void
-arc90io_rx(struct net_device *dev,int recbuf)
-{
- struct arcnet_local *lp = (struct arcnet_local *)dev->priv;
- int ioaddr=dev->base_addr;
- union ArcPacket packetbuf;
- union ArcPacket *arcpacket=&packetbuf;
- u_char *arcsoft;
- short length,offset;
- u_char daddr,saddr;
-
- lp->stats.rx_packets++;
-
- get_whole_buffer(dev,recbuf*512,4,(char *)arcpacket);
-
- saddr=arcpacket->hardheader.source;
-
- /* if source is 0, it's a "used" packet! */
- if (saddr==0)
- {
- BUGMSG(D_NORMAL,"discarding old packet. (status=%Xh)\n",
- ARCSTATUS);
- lp->stats.rx_errors++;
- return;
- }
- /* Set source address to zero to mark it as old */
-
- put_buffer_byte(dev,recbuf*512,0);
-
- arcpacket->hardheader.source=0;
-
- daddr=arcpacket->hardheader.destination;
-
- if (arcpacket->hardheader.offset1) /* Normal Packet */
- {
- offset=arcpacket->hardheader.offset1;
- arcsoft=&arcpacket->raw[offset];
- length=256-offset;
- }
- else /* ExtendedPacket or ExceptionPacket */
- {
- offset=arcpacket->hardheader.offset2;
- arcsoft=&arcpacket->raw[offset];
- length=512-offset;
- }
-
- get_whole_buffer(dev,recbuf*512+offset,length,(char *)arcpacket+offset);
-
- arcnet_rx(lp, arcsoft, length, saddr, daddr);
-
- BUGLVL(D_RX) arcnet_dump_packet(lp->adev,arcpacket->raw,length>240,"rx");
-}
-
-
-/* Given an skb, copy a packet into the ARCnet buffers for later transmission
- * by arcnet_go_tx.
- */
-static void
-arc90io_prepare_tx(struct net_device *dev,u_char *hdr,int hdrlen,
- char *data,int length,int daddr,int exceptA, int offset)
-{
- struct arcnet_local *lp = (struct arcnet_local *)dev->priv;
-
- lp->txbuf=lp->txbuf^1; /* XOR with 1 to alternate between 2 and 3 */
-
- length+=hdrlen;
-
- BUGMSG(D_TX,"arcnetAS_prep_tx: hdr:%ph, length:%d, data:%ph\n",
- hdr,length,data);
-
- put_buffer_byte(dev, lp->txbuf*512+1, daddr);
-
- /* load packet into shared memory */
- if (length<=MTU) /* Normal (256-byte) Packet */
- put_buffer_byte(dev, lp->txbuf*512+2, offset=offset?offset:256-length);
-
- else if (length>=MinTU || offset) /* Extended (512-byte) Packet */
- {
- put_buffer_byte(dev, lp->txbuf*512+2, 0);
- put_buffer_byte(dev, lp->txbuf*512+3, offset=offset?offset:512-length);
- }
- else if (exceptA) /* RFC1201 Exception Packet */
- {
- put_buffer_byte(dev, lp->txbuf*512+2, 0);
- put_buffer_byte(dev, lp->txbuf*512+3, offset=512-length-4);
-
- /* exception-specific stuff - these four bytes
- * make the packet long enough to fit in a 512-byte
- * frame.
- */
-
- put_buffer_byte(dev, lp->txbuf*512+offset,hdr[0]);
- put_whole_buffer(dev, lp->txbuf*512+offset+1,3,"\377\377\377");
- offset+=4;
- }
- else /* "other" Exception packet */
- {
- /* RFC1051 - set 4 trailing bytes to 0 */
-
- put_whole_buffer(dev,lp->txbuf*512+508,4,"\0\0\0\0");
-
- /* now round up to MinTU */
- put_buffer_byte(dev, lp->txbuf*512+2, 0);
- put_buffer_byte(dev, lp->txbuf*512+3, offset=512-MinTU);
- }
-
- /* copy the packet into ARCnet shmem
- * - the first bytes of ClientData header are skipped
- */
-
- put_whole_buffer(dev, 512*lp->txbuf+offset, hdrlen,(u_char *)hdr);
- put_whole_buffer(dev, 512*lp->txbuf+offset+hdrlen,length-hdrlen,data);
-
- BUGMSG(D_DURING,"transmitting packet to station %02Xh (%d bytes)\n",
- daddr,length);
-
- lp->lastload_dest=daddr;
- lp->txready=lp->txbuf; /* packet is ready for sending */
-}
-
-
-/****************************************************************************
- * *
- * Kernel Loadable Module Support *
- * *
- ****************************************************************************/
-
-
-#ifdef MODULE
-
-static struct net_device *cards[16]={NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
- NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL};
-
-
-int init_module(void)
-{
- struct net_device *dev=cards[0];
-
- cards[0]=dev=(struct net_device *)kmalloc(sizeof(struct net_device), GFP_KERNEL);
- if (!dev)
- return -ENOMEM;
-
- memset(dev, 0, sizeof(struct net_device));
-
- dev->name=(char *)kmalloc(9, GFP_KERNEL);
- if (!dev->name)
- {
- kfree(dev);
- return -ENOMEM;
- }
- dev->init=arc90io_probe;
-
- if (device)
- strcpy(dev->name,device);
- else arcnet_makename(dev->name);
-
- dev->base_addr=io;
- dev->irq=irq;
-
- if (dev->irq==2) dev->irq=9;
-
- if (register_netdev(dev) != 0)
- return -EIO;
-
- /* Increase use count of arcnet.o */
- arcnet_use_count(1);
- return 0;
-}
-
-void cleanup_module(void)
-{
- struct net_device *dev=cards[0];
- int ioaddr=dev->base_addr;
-
- if (dev->start) (*dev->stop)(dev);
-
- /* Flush TX and disable RX */
- if (ioaddr)
- {
- AINTMASK(0); /* disable IRQ's */
- ACOMMAND(NOTXcmd); /* stop transmit */
- ACOMMAND(NORXcmd); /* disable receive */
-
- /* Set the thing back to MMAP mode, in case the old
- driver is loaded later */
- outb( (inb(_CONFIG)&~IOMAPflag),_CONFIG);
- }
-
- if (dev->irq)
- {
- free_irq(dev->irq,dev);
- }
-
- if (dev->base_addr) release_region(dev->base_addr,ARCNET_TOTAL_SIZE);
- unregister_netdev(dev);
- kfree(dev->priv);
- dev->priv = NULL;
-
- /* Decrease use count of arcnet.o */
- arcnet_use_count(0);
-}
-
-#else
-
-void __init com90io_setup (char *str, int *ints)
-{
- struct net_device *dev;
-
- if (arcnet_num_devs == MAX_ARCNET_DEVS)
- {
- printk("com90xx IO-MAP: Too many ARCnet devices registered (max %d).\n",
- MAX_ARCNET_DEVS);
- return;
- }
-
- dev=&arcnet_devs[arcnet_num_devs];
-
- if (ints[0] < 1)
- {
- printk("com90xx IO-MAP: You must give an IO address.\n");
- return;
- }
-
- dev->init=arc90io_probe;
-
- switch(ints[0])
- {
- case 3: /* ERROR */
- printk("com90xx IO-MAP: Too many arguments.\n");
-
- case 2: /* IRQ */
- dev->irq=ints[2];
-
- case 1: /* IO address */
- dev->base_addr=ints[1];
- }
-
- dev->name = (char *)&arcnet_dev_names[arcnet_num_devs];
-
- if (str)
- strncpy(dev->name, str, 9);
-
- arcnet_num_devs++;
-}
-
-#endif /* MODULE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)