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/*

 * net-3-driver for the NI5210 card (i82586 Ethernet chip)

 *

 * This is an extension to the Linux operating system, and is covered by the

 * same Gnu Public License that covers that work.

 *

 * Alphacode 0.80 (96/02/19) for Linux 1.3.66 (or later)

 * Copyrights (c) 1994,1995,1996 by M.Hipp (Michael.Hipp@student.uni-tuebingen.de)

 *    [feel free to mail ....]

 *

 * when using as module: (no autoprobing!)

 *   compile with: gcc -D__KERNEL__ -DMODULE -O2 -c ni52.c

 *   run with e.g: insmod ni52.o io=0x360 irq=9 memstart=0xd0000 memend=0xd4000

 *

 * CAN YOU PLEASE REPORT ME YOUR PERFORMANCE EXPERIENCES !!.

 *

 * If you find a bug, please report me:

 *   The kernel panic output and any kmsg from the ni52 driver

 *   the ni5210-driver-version and the linux-kernel version

 *   how many shared memory (memsize) on the netcard,

 *   bootprom: yes/no, base_addr, mem_start

 *   maybe the ni5210-card revision and the i82586 version

 *

 * autoprobe for: base_addr: 0x300,0x280,0x360,0x320,0x340

 *                mem_start: 0xd0000,0xd2000,0xc8000,0xca000,0xd4000,0xd6000,

 *                           0xd8000,0xcc000,0xce000,0xda000,0xdc000

 *

 * sources:

 *   skeleton.c from Donald Becker

 *

 * I have also done a look in the following sources: (mail me if you need them)

 *   crynwr-packet-driver by Russ Nelson

 *   Garret A. Wollman's (fourth) i82586-driver for BSD

 *   (before getting an i82596 (yes 596 not 586) manual, the existing drivers helped

 *    me a lot to understand this tricky chip.)

 *

 * Known Problems:

 *   The internal sysbus seems to be slow. So we often lose packets because of

 *   overruns while receiving from a fast remote host.

 *   This can slow down TCP connections. Maybe the newer ni5210 cards are better.

 *   my experience is, that if a machine sends with more then about 500-600K/s

 *   the fifo/sysbus overflows.

 *

 * IMPORTANT NOTE:

 *   On fast networks, it's a (very) good idea to have 16K shared memory. With

 *   8K, we can store only 4 receive frames, so it can (easily) happen that a remote

 *   machine 'overruns' our system.

 *

 * Known i82586/card problems (I'm sure, there are many more!):

 *   Running the NOP-mode, the i82586 sometimes seems to forget to report

 *   every xmit-interrupt until we restart the CU.

 *   Another MAJOR bug is, that the RU sometimes seems to ignore the EL-Bit

 *   in the RBD-Struct which indicates an end of the RBD queue.

 *   Instead, the RU fetches another (randomly selected and

 *   usually used) RBD and begins to fill it. (Maybe, this happens only if

 *   the last buffer from the previous RFD fits exact into the queue and

 *   the next RFD can't fetch an initial RBD. Anyone knows more? )

 *

 * results from ftp performance tests with Linux 1.2.5

 *   send and receive about 350-400 KByte/s (peak up to 460 kbytes/s)

 *   sending in NOP-mode: peak performance up to 530K/s (but better don't run this mode)

 */

/*

 * 19.Feb.96: more Mcast changes, module support (MH)

 *

 * 18.Nov.95: Mcast changes (AC).

 *

 * 23.April.95: fixed(?) receiving problems by configuring a RFD more

 *              than the number of RBD's. Can maybe cause other problems.

 * 18.April.95: Added MODULE support (MH)

 * 17.April.95: MC related changes in init586() and set_multicast_list().

 *              removed use of 'jiffies' in init586() (MH)

 *

 * 19.Sep.94: Added Multicast support (not tested yet) (MH)

 *

 * 18.Sep.94: Workaround for 'EL-Bug'. Removed flexible RBD-handling.

 *            Now, every RFD has exact one RBD. (MH)

 *

 * 14.Sep.94: added promiscuous mode, a few cleanups (MH)

 *

 * 19.Aug.94: changed request_irq() parameter (MH)

 *

 * 20.July.94: removed cleanup bugs, removed a 16K-mem-probe-bug (MH)

 *

 * 19.July.94: lotsa cleanups .. (MH)

 *

 * 17.July.94: some patches ... verified to run with 1.1.29 (MH)

 *

 * 4.July.94: patches for Linux 1.1.24  (MH)

 *

 * 26.March.94: patches for Linux 1.0 and iomem-auto-probe (MH)

 *

 * 30.Sep.93: Added nop-chain .. driver now runs with only one Xmit-Buff, too (MH)

 *

 * < 30.Sep.93: first versions

 */

static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */

static int automatic_resume = 0; /* experimental .. better should be zero */

static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */

static int fifo=0x8;    /* don't change */

/* #define REALLY_SLOW_IO */

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/ioport.h>

#include <linux/malloc.h>

#include <linux/interrupt.h>

#include <linux/delay.h>

#include <asm/bitops.h>

#include <asm/io.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include "ni52.h"

#define DEBUG       /* debug on */

#define SYSBUSVAL 1 /* 8 Bit */

#define ni_attn586()  {outb(0,dev->base_addr+NI52_ATTENTION);}

#define ni_reset586() {outb(0,dev->base_addr+NI52_RESET);}

#define ni_disint()   {outb(0,dev->base_addr+NI52_INTDIS);}

#define ni_enaint()   {outb(0,dev->base_addr+NI52_INTENA);}

#define make32(ptr16) (p->memtop + (short) (ptr16) )

#define make24(ptr32) ((char *) (ptr32) - p->base)

#define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))

/******************* how to calculate the buffers *****************************

  * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works

  * --------------- in a different (more stable?) mode. Only in this mode it's

  *                 possible to configure the driver with 'NO_NOPCOMMANDS'

sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;

sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT

sizeof(rfd) = 24; sizeof(rbd) = 12;

sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;

sizeof(nop_cmd) = 8;

  * if you don't know the driver, better do not change these values: */

#define RECV_BUFF_SIZE 1524 /* slightly oversized */

#define XMIT_BUFF_SIZE 1524 /* slightly oversized */

#define NUM_XMIT_BUFFS 1    /* config for both, 8K and 16K shmem */

#define NUM_RECV_BUFFS_8  4 /* config for 8K shared mem */

#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */

#define NO_NOPCOMMANDS      /* only possible with NUM_XMIT_BUFFS=1 */

/**************************************************************************/

/* different DELAYs */

#define DELAY(x) __delay((loops_per_sec>>5)*(x)); 

#define DELAY_16(); { __delay( (loops_per_sec>>16)+1 ); }

#define DELAY_18(); { __delay( (loops_per_sec>>18)+1 ); }

/* wait for command with timeout: */

#define WAIT_4_SCB_CMD() { int i; \

  for(i=0;i<16384;i++) { \

    if(!p->scb->cmd_cuc) break; \

    DELAY_18(); \

    if(i == 16383) { \

      printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \

       if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }

#define WAIT_4_SCB_CMD_RUC() { int i; \

  for(i=0;i<16384;i++) { \

    if(!p->scb->cmd_ruc) break; \

    DELAY_18(); \

    if(i == 16383) { \

      printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \

       if(!p->reseted) { p->reseted = 1; ni_reset586(); } } } }

#define WAIT_4_STAT_COMPL(addr) { int i; \

   for(i=0;i<32767;i++) { \

     if((addr)->cmd_status & STAT_COMPL) break; \

     DELAY_16(); DELAY_16(); } }

#define NI52_TOTAL_SIZE 16

#define NI52_ADDR0 0x02

#define NI52_ADDR1 0x07

#define NI52_ADDR2 0x01

static int     ni52_probe1(struct device *dev,int ioaddr);

static void    ni52_interrupt(int irq,void *dev_id,struct pt_regs *reg_ptr);

static int     ni52_open(struct device *dev);

static int     ni52_close(struct device *dev);

static int     ni52_send_packet(struct sk_buff *,struct device *);

static struct  enet_statistics *ni52_get_stats(struct device *dev);

static void    set_multicast_list(struct device *dev);

#if 0

static void    ni52_dump(struct device *,void *);

#endif

/* helper-functions */

static int     init586(struct device *dev);

static int     check586(struct device *dev,char *where,unsigned size);

static void    alloc586(struct device *dev);

static void    startrecv586(struct device *dev);

static void   *alloc_rfa(struct device *dev,void *ptr);

static void    ni52_rcv_int(struct device *dev);

static void    ni52_xmt_int(struct device *dev);

static void    ni52_rnr_int(struct device *dev);

struct priv

{

  struct enet_statistics stats;

  unsigned long base;

  char *memtop;

  int lock,reseted;

  volatile struct rfd_struct  *rfd_last,*rfd_top,*rfd_first;

  volatile struct scp_struct  *scp;  /* volatile is important */

  volatile struct iscp_struct *iscp; /* volatile is important */

  volatile struct scb_struct  *scb;  /* volatile is important */

  volatile struct tbd_struct  *xmit_buffs[NUM_XMIT_BUFFS];

  volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];

#if (NUM_XMIT_BUFFS == 1)

  volatile struct nop_cmd_struct *nop_cmds[2];

#else

  volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];

#endif

  volatile int    nop_point,num_recv_buffs;

  volatile char  *xmit_cbuffs[NUM_XMIT_BUFFS];

  volatile int    xmit_count,xmit_last;

};

/**********************************************

 * close device

 */

static int ni52_close(struct device *dev)

{

  free_irq(dev->irq, NULL);

  irq2dev_map[dev->irq] = NULL;

  ni_reset586(); /* the hard way to stop the receiver */

  dev->start = 0;

  dev->tbusy = 0;

  MOD_DEC_USE_COUNT;

  return 0;

}

/**********************************************

 * open device

 */

static int ni52_open(struct device *dev)

{

  ni_disint();

  alloc586(dev);

  init586(dev);

  startrecv586(dev);

  ni_enaint();

  if(request_irq(dev->irq, &ni52_interrupt,0,"ni5210",NULL))

  {

    ni_reset586();

    return -EAGAIN;

  }

  irq2dev_map[dev->irq] = dev;

  dev->interrupt = 0;

  dev->tbusy = 0;

  dev->start = 1;

  MOD_INC_USE_COUNT;

  return 0; /* most done by init */

}

/**********************************************

 * Check to see if there's an 82586 out there.

 */

static int check586(struct device *dev,char *where,unsigned size)

{

  struct priv pb;

  struct priv *p = /* (struct priv *) dev->priv*/ &pb;

  char *iscp_addrs[2];

  int i;

  p->base = (unsigned long) where + size - 0x01000000;

  p->memtop = where + size;

  p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);

  memset((char *)p->scp,0, sizeof(struct scp_struct));

  for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */

    if(((char *)p->scp)[i])

      return 0;

  p->scp->sysbus = SYSBUSVAL;        /* 1 = 8Bit-Bus, 0 = 16 Bit */

  if(p->scp->sysbus != SYSBUSVAL)

    return 0;

  iscp_addrs[0] = where;

  iscp_addrs[1]= (char *) p->scp - sizeof(struct iscp_struct);

  for(i=0;i<2;i++)

  {

    p->iscp = (struct iscp_struct *) iscp_addrs[i];

    memset((char *)p->iscp,0, sizeof(struct iscp_struct));

    p->scp->iscp = make24(p->iscp);

    p->iscp->busy = 1;

    ni_reset586();

    ni_attn586();

    DELAY(1);   /* wait a while... */

    if(p->iscp->busy) /* i82586 clears 'busy' after successful init */

      return 0;

  }

  return 1;

}

/******************************************************************

 * set iscp at the right place, called by ni52_probe1 and open586.

 */

void alloc586(struct device *dev)

{

  struct priv *p =  (struct priv *) dev->priv;

  ni_reset586();

  DELAY(1);

  p->scp  = (struct scp_struct *)  (p->base + SCP_DEFAULT_ADDRESS);

  p->scb  = (struct scb_struct *)  (dev->mem_start);

  p->iscp = (struct iscp_struct *) ((char *)p->scp - sizeof(struct iscp_struct));

  memset((char *) p->iscp,0,sizeof(struct iscp_struct));

  memset((char *) p->scp ,0,sizeof(struct scp_struct));

  p->scp->iscp = make24(p->iscp);

  p->scp->sysbus = SYSBUSVAL;

  p->iscp->scb_offset = make16(p->scb);

  p->iscp->busy = 1;

  ni_reset586();

  ni_attn586();

  DELAY(1);

  if(p->iscp->busy)

    printk("%s: Init-Problems (alloc).\n",dev->name);

  p->reseted = 0;

  memset((char *)p->scb,0,sizeof(struct scb_struct));

}

/**********************************************

 * probe the ni5210-card

 */

int ni52_probe(struct device *dev)

{

#ifndef MODULE

  int *port;

  static int ports[] = {0x300, 0x280, 0x360 , 0x320 , 0x340, 0};

#endif

  int base_addr = dev->base_addr;

  if (base_addr > 0x1ff) {              /* Check a single specified location. */

    if( (inb(base_addr+NI52_MAGIC1) == NI52_MAGICVAL1) &&

        (inb(base_addr+NI52_MAGIC2) == NI52_MAGICVAL2))

      return ni52_probe1(dev, base_addr);

  }

  else if (base_addr > 0)                /* Don't probe at all. */

    return ENXIO;

#ifdef MODULE

  printk("%s: no autoprobing allowed for modules.\n",dev->name);

#else

  for (port = ports; *port; port++) {

    int ioaddr = *port;

    if (check_region(ioaddr, NI52_TOTAL_SIZE))

      continue;

    if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||

        !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2))

      continue;

    dev->base_addr = ioaddr;

    if (ni52_probe1(dev, ioaddr) == 0)

      return 0;

  }

#ifdef FULL_IO_PROBE

  for(dev->base_addr=0x200;dev->base_addr<0x400;dev->base_addr+=8)

  {

    int ioaddr = dev->base_addr;

    if (check_region(ioaddr, NI52_TOTAL_SIZE))

      continue;

    if( !(inb(ioaddr+NI52_MAGIC1) == NI52_MAGICVAL1) ||

        !(inb(ioaddr+NI52_MAGIC2) == NI52_MAGICVAL2))

      continue;

    if (ni52_probe1(dev, ioaddr) == 0)

      return 0;

  }

#endif

#endif

  dev->base_addr = base_addr;

  return ENODEV;

}

static int ni52_probe1(struct device *dev,int ioaddr)

{

  int i,size;

  for(i=0;i<ETH_ALEN;i++)

    dev->dev_addr[i] = inb(dev->base_addr+i);

  if(dev->dev_addr[0] != NI52_ADDR0 || dev->dev_addr[1] != NI52_ADDR1

     || dev->dev_addr[2] != NI52_ADDR2)

    return ENODEV;

  printk("%s: NI5210 found at %#3lx, ",dev->name,dev->base_addr);

  request_region(ioaddr,NI52_TOTAL_SIZE,"ni5210");

  /*

   * check (or search) IO-Memory, 8K and 16K

   */

#ifdef MODULE

  size = dev->mem_end - dev->mem_start;

  if(size != 0x2000 && size != 0x4000)

  {

    printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 bytes.\n",dev->name,size);

    return ENODEV;

  }

  if(!check586(dev,(char *) dev->mem_start,size))

  {

    printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);

    return ENODEV;

  }

#else

  if(dev->mem_start != 0) /* no auto-mem-probe */

  {

    size = 0x4000; /* check for 16K mem */

    if(!check586(dev,(char *) dev->mem_start,size)) {

      size = 0x2000; /* check for 8K mem */

      if(!check586(dev,(char *) dev->mem_start,size)) {

        printk("?memprobe, Can't find memory at 0x%lx!\n",dev->mem_start);

        return ENODEV;

      }

    }

  }

  else

  {

   static long memaddrs[] = { 0xc8000,0xca000,0xcc000,0xce000,0xd0000,0xd2000,

                              0xd4000,0xd6000,0xd8000,0xda000,0xdc000, 0 };

   for(i=0;;i++)

    {

      if(!memaddrs[i]) {

        printk("?memprobe, Can't find io-memory!\n");

        return ENODEV;

      }

      dev->mem_start = memaddrs[i];

      size = 0x2000; /* check for 8K mem */

      if(check586(dev,(char *)dev->mem_start,size)) /* 8K-check */

        break;

      size = 0x4000; /* check for 16K mem */

      if(check586(dev,(char *)dev->mem_start,size)) /* 16K-check */

        break;

    }

  }

  dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */

#endif

  dev->priv = (void *) kmalloc(sizeof(struct priv),GFP_KERNEL);

  if(dev->priv == NULL)

  {

    printk("%s: Ooops .. can't allocate private driver memory.\n",dev->name);

    return -ENOMEM;

  }

                                  /* warning: we don't free it on errors */

  memset((char *) dev->priv,0,sizeof(struct priv));

  ((struct priv *) (dev->priv))->memtop = (char *) dev->mem_start + size;

  ((struct priv *) (dev->priv))->base =  dev->mem_start + size - 0x01000000;

  alloc586(dev);

  /* set number of receive-buffs according to memsize */

  if(size == 0x2000)

    ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_8;

  else

    ((struct priv *) dev->priv)->num_recv_buffs = NUM_RECV_BUFFS_16;

  printk("Memaddr: 0x%lx, Memsize: %d, ",dev->mem_start,size);

  if(dev->irq < 2)

  {

    autoirq_setup(0);

    ni_reset586();

    ni_attn586();

    if(!(dev->irq = autoirq_report(2)))

    {

      printk("?autoirq, Failed to detect IRQ line!\n");

      return 1;

    }

    printk("IRQ %d (autodetected).\n",dev->irq);

  }

  else  {

    if(dev->irq == 2)

      dev->irq = 9;

    printk("IRQ %d (assigned and not checked!).\n",dev->irq);

  }

  dev->open            = &ni52_open;

  dev->stop            = &ni52_close;

  dev->get_stats       = &ni52_get_stats;

  dev->hard_start_xmit = &ni52_send_packet;

  dev->set_multicast_list = &set_multicast_list;

  dev->if_port         = 0;

  ether_setup(dev);

  dev->tbusy = 0;

  dev->interrupt = 0;

  dev->start = 0;

  return 0;

}

/**********************************************

 * init the chip (ni52-interrupt should be disabled?!)

 * needs a correct 'allocated' memory

 */

static int init586(struct device *dev)

{

  void *ptr;

  int i,result=0;

  struct priv *p = (struct priv *) dev->priv;

  volatile struct configure_cmd_struct  *cfg_cmd;

  volatile struct iasetup_cmd_struct *ias_cmd;

  volatile struct tdr_cmd_struct *tdr_cmd;

  volatile struct mcsetup_cmd_struct *mc_cmd;

  struct dev_mc_list *dmi=dev->mc_list;

  int num_addrs=dev->mc_count;

  ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));

  cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */

  cfg_cmd->cmd_status = 0;

  cfg_cmd->cmd_cmd    = CMD_CONFIGURE | CMD_LAST;

  cfg_cmd->cmd_link   = 0xffff;

  cfg_cmd->byte_cnt   = 0x0a; /* number of cfg bytes */

  cfg_cmd->fifo       = fifo; /* fifo-limit (8=tx:32/rx:64) */

  cfg_cmd->sav_bf     = 0x40; /* hold or discard bad recv frames (bit 7) */

  cfg_cmd->adr_len    = 0x2e; /* addr_len |!src_insert |pre-len |loopback */

  cfg_cmd->priority   = 0x00;

  cfg_cmd->ifs        = 0x60;

  cfg_cmd->time_low   = 0x00;

  cfg_cmd->time_high  = 0xf2;

  cfg_cmd->promisc    = 0;

  if(dev->flags & IFF_ALLMULTI) {

    int len = ((char *) p->iscp - (char *) ptr - 8) / 6;

    if(num_addrs > len)  {

      printk("%s: switching to promisc. mode\n",dev->name);

      dev->flags|=IFF_PROMISC;

    }

  }

  if(dev->flags&IFF_PROMISC)

  {

       cfg_cmd->promisc=1;

       dev->flags|=IFF_PROMISC;

  }

  cfg_cmd->carr_coll  = 0x00;

  p->scb->cbl_offset = make16(cfg_cmd);

  p->scb->cmd_ruc = 0;

  p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */

  ni_attn586();

  WAIT_4_STAT_COMPL(cfg_cmd);

  if((cfg_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))

  {

    printk("%s: configure command failed: %x\n",dev->name,cfg_cmd->cmd_status);

    return 1;

  }

    /*

     * individual address setup

     */

  ias_cmd = (struct iasetup_cmd_struct *)ptr;

  ias_cmd->cmd_status = 0;

  ias_cmd->cmd_cmd    = CMD_IASETUP | CMD_LAST;

  ias_cmd->cmd_link   = 0xffff;

  memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);

  p->scb->cbl_offset = make16(ias_cmd);

  p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */

  ni_attn586();

  WAIT_4_STAT_COMPL(ias_cmd);

  if((ias_cmd->cmd_status & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {

    printk("%s (ni52): individual address setup command failed: %04x\n",dev->name,ias_cmd->cmd_status);

    return 1;

  }

   /*

    * TDR, wire check .. e.g. no resistor e.t.c

    */

  tdr_cmd = (struct tdr_cmd_struct *)ptr;

  tdr_cmd->cmd_status  = 0;

  tdr_cmd->cmd_cmd     = CMD_TDR | CMD_LAST;

  tdr_cmd->cmd_link    = 0xffff;

  tdr_cmd->status      = 0;

  p->scb->cbl_offset = make16(tdr_cmd);

  p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */

  ni_attn586();

  WAIT_4_STAT_COMPL(tdr_cmd);

  if(!(tdr_cmd->cmd_status & STAT_COMPL))

  {

    printk("%s: Problems while running the TDR.\n",dev->name);

  }

  else

  {

    DELAY_16(); /* wait for result */

    result = tdr_cmd->status;

    p->scb->cmd_cuc = p->scb->cus & STAT_MASK;

    ni_attn586(); /* ack the interrupts */

    if(result & TDR_LNK_OK)

      ;

    else if(result & TDR_XCVR_PRB)

      printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);

    else if(result & TDR_ET_OPN)

      printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);

    else if(result & TDR_ET_SRT)