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wavelan_cs.c

/*
 *    Wavelan Pcmcia driver
 *
 *          Jean II - HPLB '96
 *
 * Reorganisation and extension of the driver.
 * Original copyright follow. See wavelan_cs.h for details.
 *
 * This code is derived from Anthony D. Joseph's code and all the changes here
 * are also under the original copyright below.
 *
 * This code supports version 2.00 of WaveLAN/PCMCIA cards (2.4GHz), and
 * can work on Linux 2.0.36 with support of David Hinds' PCMCIA Card Services
 *
 * Joe Finney (joe@comp.lancs.ac.uk) at Lancaster University in UK added
 * critical code in the routine to initialize the Modem Management Controller.
 *
 * Thanks to Alan Cox and Bruce Janson for their advice.
 *
 *    -- Yunzhou Li (scip4166@nus.sg)
 *
#ifdef WAVELAN_ROAMING  
 * Roaming support added 07/22/98 by Justin Seger (jseger@media.mit.edu)
 * based on patch by Joe Finney from Lancaster University.
#endif
 *
 * Lucent (formerly AT&T GIS, formerly NCR) WaveLAN PCMCIA card: An
 * Ethernet-like radio transceiver controlled by an Intel 82593 coprocessor.
 *
 *   A non-shared memory PCMCIA ethernet driver for linux
 *
 * ISA version modified to support PCMCIA by Anthony Joseph (adj@lcs.mit.edu)
 *
 *
 * Joseph O'Sullivan & John Langford (josullvn@cs.cmu.edu & jcl@cs.cmu.edu)
 *
 * Apr 2 '98  made changes to bring the i82593 control/int handling in line
 *             with offical specs...
 *
 ****************************************************************************
 *   Copyright 1995
 *   Anthony D. Joseph
 *   Massachusetts Institute of Technology
 *
 *   Permission to use, copy, modify, and distribute this program
 *   for any purpose and without fee is hereby granted, provided
 *   that this copyright and permission notice appear on all copies
 *   and supporting documentation, the name of M.I.T. not be used
 *   in advertising or publicity pertaining to distribution of the
 *   program without specific prior permission, and notice be given
 *   in supporting documentation that copying and distribution is
 *   by permission of M.I.T.  M.I.T. makes no representations about
 *   the suitability of this software for any purpose.  It is pro-
 *   vided "as is" without express or implied warranty.         
 ****************************************************************************
 *
 */

#include "wavelan_cs.h"       /* Private header */

/************************* MISC SUBROUTINES **************************/
/*
 * Subroutines which won't fit in one of the following category
 * (wavelan modem or i82593)
 */

/*------------------------------------------------------------------*/
/*
 * Wrapper for disabling interrupts.
 * (note : inline, so optimised away)
 */
static inline void
wv_splhi(net_local *          lp,
       unsigned long *  pflags)
{
  spin_lock_irqsave(&lp->spinlock, *pflags);
  /* Note : above does the cli(); itself */
}

/*------------------------------------------------------------------*/
/*
 * Wrapper for re-enabling interrupts.
 */
static inline void
wv_splx(net_local *           lp,
      unsigned long *         pflags)
{
  spin_unlock_irqrestore(&lp->spinlock, *pflags);

  /* Note : enabling interrupts on the hardware is done in wv_ru_start()
   * via : outb(OP1_INT_ENABLE, LCCR(base));
   */
}

/*------------------------------------------------------------------*/
/*
 * Wrapper for reporting error to cardservices
 */
static void cs_error(client_handle_t handle, int func, int ret)
{
    error_info_t err = { func, ret };
    CardServices(ReportError, handle, &err);
}

#ifdef STRUCT_CHECK
/*------------------------------------------------------------------*/
/*
 * Sanity routine to verify the sizes of the various WaveLAN interface
 * structures.
 */
static char *
wv_structuct_check(void)
{
#define     SC(t,s,n)   if (sizeof(t) != s) return(n);

  SC(psa_t, PSA_SIZE, "psa_t");
  SC(mmw_t, MMW_SIZE, "mmw_t");
  SC(mmr_t, MMR_SIZE, "mmr_t");

#undef      SC

  return((char *) NULL);
} /* wv_structuct_check */
#endif      /* STRUCT_CHECK */

/******************* MODEM MANAGEMENT SUBROUTINES *******************/
/*
 * Useful subroutines to manage the modem of the wavelan
 */

/*------------------------------------------------------------------*/
/*
 * Read from card's Host Adaptor Status Register.
 */
static inline u_char
hasr_read(u_long  base)
{
  return(inb(HASR(base)));
} /* hasr_read */

/*------------------------------------------------------------------*/
/*
 * Write to card's Host Adapter Command Register.
 */
static inline void
hacr_write(u_long base,
         u_char   hacr)
{
  outb(hacr, HACR(base));
} /* hacr_write */

/*------------------------------------------------------------------*/
/*
 * Write to card's Host Adapter Command Register. Include a delay for
 * those times when it is needed.
 */
static inline void
hacr_write_slow(u_long  base,
            u_char      hacr)
{
  hacr_write(base, hacr);
  /* delay might only be needed sometimes */
  mdelay(1);
} /* hacr_write_slow */

/*------------------------------------------------------------------*/
/*
 * Read the Parameter Storage Area from the WaveLAN card's memory
 */
static void
psa_read(device * dev,
       int        o,    /* offset in PSA */
       u_char *   b,    /* buffer to fill */
       int        n)    /* size to read */
{
  u_char *  ptr = ((u_char *)dev->mem_start) + PSA_ADDR + (o << 1);

  while(n-- > 0)
    {
      *b++ = readb(ptr);
      /* Due to a lack of address decode pins, the WaveLAN PCMCIA card
       * only supports reading even memory addresses. That means the
       * increment here MUST be two.
       * Because of that, we can't use memcpy_fromio()...
       */
      ptr += 2;
    }
} /* psa_read */

/*------------------------------------------------------------------*/
/*
 * Write the Paramter Storage Area to the WaveLAN card's memory
 */
static void
psa_write(device *      dev,
        int       o,    /* Offset in psa */
        u_char *  b,    /* Buffer in memory */
        int       n)    /* Length of buffer */
{
  u_char *  ptr = ((u_char *) dev->mem_start) + PSA_ADDR + (o << 1);
  int       count = 0;
  ioaddr_t  base = dev->base_addr;
  /* As there seem to have no flag PSA_BUSY as in the ISA model, we are
   * oblige to verify this address to know when the PSA is ready... */
  volatile u_char *     verify = ((u_char *) dev->mem_start) + PSA_ADDR +
    (psaoff(0, psa_comp_number) << 1);

  /* Authorize writting to PSA */
  hacr_write(base, HACR_PWR_STAT | HACR_ROM_WEN);

  while(n-- > 0)
    {
      /* write to PSA */
      writeb(*b++, ptr);
      ptr += 2;

      /* I don't have the spec, so I don't know what the correct
       * sequence to write is. This hack seem to work for me... */
      count = 0;
      while((readb(verify) != PSA_COMP_PCMCIA_915) && (count++ < 100))
      mdelay(1);
    }

  /* Put the host interface back in standard state */
  hacr_write(base, HACR_DEFAULT);
} /* psa_write */

#ifdef SET_PSA_CRC
/*------------------------------------------------------------------*/
/*
 * Calculate the PSA CRC
 * Thanks to Valster, Nico <NVALSTER@wcnd.nl.lucent.com> for the code
 * NOTE: By specifying a length including the CRC position the
 * returned value should be zero. (i.e. a correct checksum in the PSA)
 *
 * The Windows drivers don't use the CRC, but the AP and the PtP tool
 * depend on it.
 */
static u_short
psa_crc(unsigned char * psa,  /* The PSA */
      int         size) /* Number of short for CRC */
{
  int       byte_cnt;   /* Loop on the PSA */
  u_short   crc_bytes = 0;    /* Data in the PSA */
  int       bit_cnt;    /* Loop on the bits of the short */

  for(byte_cnt = 0; byte_cnt < size; byte_cnt++ )
    {
      crc_bytes ^= psa[byte_cnt];   /* Its an xor */

      for(bit_cnt = 1; bit_cnt < 9; bit_cnt++ )
      {
        if(crc_bytes & 0x0001)
          crc_bytes = (crc_bytes >> 1) ^ 0xA001;
        else
          crc_bytes >>= 1 ;
        }
    }

  return crc_bytes;
} /* psa_crc */
#endif      /* SET_PSA_CRC */

/*------------------------------------------------------------------*/
/*
 * update the checksum field in the Wavelan's PSA
 */
static void
update_psa_checksum(device *  dev)
{
#ifdef SET_PSA_CRC
  psa_t           psa;
  u_short   crc;

  /* read the parameter storage area */
  psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa));

  /* update the checksum */
  crc = psa_crc((unsigned char *) &psa,
            sizeof(psa) - sizeof(psa.psa_crc[0]) - sizeof(psa.psa_crc[1])
            - sizeof(psa.psa_crc_status));

  psa.psa_crc[0] = crc & 0xFF;
  psa.psa_crc[1] = (crc & 0xFF00) >> 8;

  /* Write it ! */
  psa_write(dev, (char *)&psa.psa_crc - (char *)&psa,
          (unsigned char *)&psa.psa_crc, 2);

#ifdef DEBUG_IOCTL_INFO
  printk (KERN_DEBUG "%s: update_psa_checksum(): crc = 0x%02x%02x\n",
          dev->name, psa.psa_crc[0], psa.psa_crc[1]);

  /* Check again (luxury !) */
  crc = psa_crc((unsigned char *) &psa,
             sizeof(psa) - sizeof(psa.psa_crc_status));

  if(crc != 0)
    printk(KERN_WARNING "%s: update_psa_checksum(): CRC does not agree with PSA data (even after recalculating)\n", dev->name);
#endif /* DEBUG_IOCTL_INFO */
#endif      /* SET_PSA_CRC */
} /* update_psa_checksum */

/*------------------------------------------------------------------*/
/*
 * Write 1 byte to the MMC.
 */
static inline void
mmc_out(u_long          base,
      u_short           o,
      u_char            d)
{
  /* Wait for MMC to go idle */
  while(inb(HASR(base)) & HASR_MMI_BUSY)
    ;

  outb((u_char)((o << 1) | MMR_MMI_WR), MMR(base));
  outb(d, MMD(base));
}

/*------------------------------------------------------------------*/
/*
 * Routine to write bytes to the Modem Management Controller.
 * We start by the end because it is the way it should be !
 */
static inline void
mmc_write(u_long  base,
        u_char    o,
        u_char *  b,
        int       n)
{
  o += n;
  b += n;

  while(n-- > 0 )
    mmc_out(base, --o, *(--b));
} /* mmc_write */

/*------------------------------------------------------------------*/
/*
 * Read 1 byte from the MMC.
 * Optimised version for 1 byte, avoid using memory...
 */
static inline u_char
mmc_in(u_long     base,
       u_short    o)
{
  while(inb(HASR(base)) & HASR_MMI_BUSY)
    ;
  outb(o << 1, MMR(base));          /* Set the read address */

  outb(0, MMD(base));               /* Required dummy write */

  while(inb(HASR(base)) & HASR_MMI_BUSY)
    ;
  return (u_char) (inb(MMD(base))); /* Now do the actual read */
}

/*------------------------------------------------------------------*/
/*
 * Routine to read bytes from the Modem Management Controller.
 * The implementation is complicated by a lack of address lines,
 * which prevents decoding of the low-order bit.
 * (code has just been moved in the above function)
 * We start by the end because it is the way it should be !
 */
static inline void
mmc_read(u_long         base,
       u_char           o,
       u_char *   b,
       int        n)
{
  o += n;
  b += n;

  while(n-- > 0)
    *(--b) = mmc_in(base, --o);
} /* mmc_read */

/*------------------------------------------------------------------*/
/*
 * Get the type of encryption available...
 */
static inline int
mmc_encr(u_long         base) /* i/o port of the card */
{
  int temp;

  temp = mmc_in(base, mmroff(0, mmr_des_avail));
  if((temp != MMR_DES_AVAIL_DES) && (temp != MMR_DES_AVAIL_AES))
    return 0;
  else
    return temp;
}

/*------------------------------------------------------------------*/
/*
 * Wait for the frequency EEprom to complete a command...
 * I hope this one will be optimally inlined...
 */
static inline void
fee_wait(u_long         base, /* i/o port of the card */
       int        delay,      /* Base delay to wait for */
       int        number)     /* Number of time to wait */
{
  int       count = 0;  /* Wait only a limited time */

  while((count++ < number) &&
      (mmc_in(base, mmroff(0, mmr_fee_status)) & MMR_FEE_STATUS_BUSY))
    udelay(delay);
}

/*------------------------------------------------------------------*/
/*
 * Read bytes from the Frequency EEprom (frequency select cards).
 */
static void
fee_read(u_long         base, /* i/o port of the card */
       u_short    o,    /* destination offset */
       u_short *  b,    /* data buffer */
       int        n)    /* number of registers */
{
  b += n;         /* Position at the end of the area */

  /* Write the address */
  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n - 1);

  /* Loop on all buffer */
  while(n-- > 0)
    {
      /* Write the read command */
      mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_READ);

      /* Wait until EEprom is ready (should be quick !) */
      fee_wait(base, 10, 100);

      /* Read the value */
      *--b = ((mmc_in(base, mmroff(0, mmr_fee_data_h)) << 8) |
            mmc_in(base, mmroff(0, mmr_fee_data_l)));
    }
}

#ifdef WIRELESS_EXT     /* If wireless extension exist in the kernel */

/*------------------------------------------------------------------*/
/*
 * Write bytes from the Frequency EEprom (frequency select cards).
 * This is a bit complicated, because the frequency eeprom has to
 * be unprotected and the write enabled.
 * Jean II
 */
static void
fee_write(u_long  base, /* i/o port of the card */
        u_short   o,    /* destination offset */
        u_short * b,    /* data buffer */
        int       n)    /* number of registers */
{
  b += n;         /* Position at the end of the area */

#ifdef EEPROM_IS_PROTECTED    /* disabled */
#ifdef DOESNT_SEEM_TO_WORK    /* disabled */
  /* Ask to read the protected register */
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRREAD);

  fee_wait(base, 10, 100);

  /* Read the protected register */
  printk("Protected 2 : %02X-%02X\n",
       mmc_in(base, mmroff(0, mmr_fee_data_h)),
       mmc_in(base, mmroff(0, mmr_fee_data_l)));
#endif      /* DOESNT_SEEM_TO_WORK */

  /* Enable protected register */
  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PREN);

  fee_wait(base, 10, 100);

  /* Unprotect area */
  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n);
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);
#ifdef DOESNT_SEEM_TO_WORK    /* disabled */
  /* Or use : */
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRCLEAR);
#endif      /* DOESNT_SEEM_TO_WORK */

  fee_wait(base, 10, 100);
#endif      /* EEPROM_IS_PROTECTED */

  /* Write enable */
  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WREN);

  fee_wait(base, 10, 100);

  /* Write the EEprom address */
  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n - 1);

  /* Loop on all buffer */
  while(n-- > 0)
    {
      /* Write the value */
      mmc_out(base, mmwoff(0, mmw_fee_data_h), (*--b) >> 8);
      mmc_out(base, mmwoff(0, mmw_fee_data_l), *b & 0xFF);

      /* Write the write command */
      mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WRITE);

      /* Wavelan doc says : wait at least 10 ms for EEBUSY = 0 */
      mdelay(10);
      fee_wait(base, 10, 100);
    }

  /* Write disable */
  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_DS);
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WDS);

  fee_wait(base, 10, 100);

#ifdef EEPROM_IS_PROTECTED    /* disabled */
  /* Reprotect EEprom */
  mmc_out(base, mmwoff(0, mmw_fee_addr), 0x00);
  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);

  fee_wait(base, 10, 100);
#endif      /* EEPROM_IS_PROTECTED */
}
#endif      /* WIRELESS_EXT */

/******************* WaveLAN Roaming routines... ********************/

#ifdef WAVELAN_ROAMING  /* Conditional compile, see wavelan_cs.h */

unsigned char WAVELAN_BEACON_ADDRESS[]= {0x09,0x00,0x0e,0x20,0x03,0x00};
  
void wv_roam_init(struct net_device *dev)
{
  net_local  *lp= (net_local *)dev->priv;

  /* Won't enable roaming if the interface is down */
  if (!lp->link->open || !netif_running(dev) || netif_queue_stopped(dev))
    return;

  /* Do not remove this unless you have a good reason */
  printk(KERN_NOTICE "%s: Warning, you have enabled roaming on"
       " device %s !\n", dev->name, dev->name);
  printk(KERN_NOTICE "Roaming is currently an experimental unsupported feature"
       " of the Wavelan driver.\n");
  printk(KERN_NOTICE "It may work, but may also make the driver behave in"
       " erratic ways or crash.\n");

  lp->wavepoint_table.head=NULL;           /* Initialise WavePoint table */
  lp->wavepoint_table.num_wavepoints=0;
  lp->wavepoint_table.locked=0;
  lp->curr_point=NULL;                        /* No default WavePoint */
  lp->cell_search=0;
  
  lp->cell_timer.data=(long)lp;               /* Start cell expiry timer */
  lp->cell_timer.function=wl_cell_expiry;
  lp->cell_timer.expires=jiffies+CELL_TIMEOUT;
  add_timer(&lp->cell_timer);
  
  wv_nwid_filter(NWID_PROMISC,lp) ;    /* Enter NWID promiscuous mode */
  /* to build up a good WavePoint */
                                           /* table... */
  printk(KERN_DEBUG "WaveLAN: Roaming enabled on device %s\n",dev->name);
}
 
void wv_roam_cleanup(struct net_device *dev)
{
  wavepoint_history *ptr,*old_ptr;
  net_local *lp= (net_local *)dev->priv;
  
  printk(KERN_DEBUG "WaveLAN: Roaming Disabled on device %s\n",dev->name);
  
  /* Fixme : maybe we should check that the timer exist before deleting it */
  del_timer(&lp->cell_timer);          /* Remove cell expiry timer       */
  ptr=lp->wavepoint_table.head;        /* Clear device's WavePoint table */
  while(ptr!=NULL)
    {
      old_ptr=ptr;
      ptr=ptr->next;    
      wl_del_wavepoint(old_ptr,lp); 
    }
}

/* Enable/Disable NWID promiscuous mode on a given device */
void wv_nwid_filter(unsigned char mode, net_local *lp)
{
  mm_t                  m;
  unsigned long         flags;
  
#ifdef WAVELAN_ROAMING_DEBUG
  printk(KERN_DEBUG "WaveLAN: NWID promisc %s, device %s\n",(mode==NWID_PROMISC) ? "on" : "off", lp->dev->name);
#endif
  
  /* Disable interrupts & save flags */
  wv_splhi(lp, &flags);
  
  m.w.mmw_loopt_sel = (mode==NWID_PROMISC) ? MMW_LOOPT_SEL_DIS_NWID : 0x00;
  mmc_write(lp->dev->base_addr, (char *)&m.w.mmw_loopt_sel - (char *)&m, (unsigned char *)&m.w.mmw_loopt_sel, 1);
  
  if(mode==NWID_PROMISC)
    lp->cell_search=1;
  else
    lp->cell_search=0;

  /* ReEnable interrupts & restore flags */
  wv_splx(lp, &flags);
}

/* Find a record in the WavePoint table matching a given NWID */
wavepoint_history *wl_roam_check(unsigned short nwid, net_local *lp)
{
  wavepoint_history     *ptr=lp->wavepoint_table.head;
  
  while(ptr!=NULL){
    if(ptr->nwid==nwid)
      return ptr; 
    ptr=ptr->next;
  }
  return NULL;
}

/* Create a new wavepoint table entry */
wavepoint_history *wl_new_wavepoint(unsigned short nwid, unsigned char seq, net_local* lp)
{
  wavepoint_history *new_wavepoint;

#ifdef WAVELAN_ROAMING_DEBUG  
  printk(KERN_DEBUG "WaveLAN: New Wavepoint, NWID:%.4X\n",nwid);
#endif
  
  if(lp->wavepoint_table.num_wavepoints==MAX_WAVEPOINTS)
    return NULL;
  
  new_wavepoint=(wavepoint_history *) kmalloc(sizeof(wavepoint_history),GFP_ATOMIC);
  if(new_wavepoint==NULL)
    return NULL;
  
  new_wavepoint->nwid=nwid;                       /* New WavePoints NWID */
  new_wavepoint->average_fast=0;                    /* Running Averages..*/
  new_wavepoint->average_slow=0;
  new_wavepoint->qualptr=0;                       /* Start of ringbuffer */
  new_wavepoint->last_seq=seq-1;                /* Last sequence no.seen */
  memset(new_wavepoint->sigqual,0,WAVEPOINT_HISTORY);/* Empty ringbuffer */
  
  new_wavepoint->next=lp->wavepoint_table.head;/* Add to wavepoint table */
  new_wavepoint->prev=NULL;
  
  if(lp->wavepoint_table.head!=NULL)
    lp->wavepoint_table.head->prev=new_wavepoint;
  
  lp->wavepoint_table.head=new_wavepoint;
  
  lp->wavepoint_table.num_wavepoints++;     /* no. of visible wavepoints */
  
  return new_wavepoint;
}

/* Remove a wavepoint entry from WavePoint table */
void wl_del_wavepoint(wavepoint_history *wavepoint, struct net_local *lp)
{
  if(wavepoint==NULL)
    return;
  
  if(lp->curr_point==wavepoint)
    lp->curr_point=NULL;
  
  if(wavepoint->prev!=NULL)
    wavepoint->prev->next=wavepoint->next;
  
  if(wavepoint->next!=NULL)
    wavepoint->next->prev=wavepoint->prev;
  
  if(lp->wavepoint_table.head==wavepoint)
    lp->wavepoint_table.head=wavepoint->next;
  
  lp->wavepoint_table.num_wavepoints--;
  kfree(wavepoint);
}

/* Timer callback function - checks WavePoint table for stale entries */ 
void wl_cell_expiry(unsigned long data)
{
  net_local *lp=(net_local *)data;
  wavepoint_history *wavepoint=lp->wavepoint_table.head,*old_point;
  
#if WAVELAN_ROAMING_DEBUG > 1
  printk(KERN_DEBUG "WaveLAN: Wavepoint timeout, dev %s\n",lp->dev->name);
#endif
  
  if(lp->wavepoint_table.locked)
    {
#if WAVELAN_ROAMING_DEBUG > 1
      printk(KERN_DEBUG "WaveLAN: Wavepoint table locked...\n");
#endif
      
      lp->cell_timer.expires=jiffies+1; /* If table in use, come back later */
      add_timer(&lp->cell_timer);
      return;
    }
  
  while(wavepoint!=NULL)
    {
      if(wavepoint->last_seen < jiffies-CELL_TIMEOUT)
      {
#ifdef WAVELAN_ROAMING_DEBUG
        printk(KERN_DEBUG "WaveLAN: Bye bye %.4X\n",wavepoint->nwid);
#endif
        
        old_point=wavepoint;
        wavepoint=wavepoint->next;
        wl_del_wavepoint(old_point,lp);
      }
      else
      wavepoint=wavepoint->next;
    }
  lp->cell_timer.expires=jiffies+CELL_TIMEOUT;
  add_timer(&lp->cell_timer);
}

/* Update SNR history of a wavepoint */
void wl_update_history(wavepoint_history *wavepoint, unsigned char sigqual, unsigned char seq)  
{
  int i=0,num_missed=0,ptr=0;
  int average_fast=0,average_slow=0;
  
  num_missed=(seq-wavepoint->last_seq)%WAVEPOINT_HISTORY;/* Have we missed
                                              any beacons? */
  if(num_missed)
    for(i=0;i<num_missed;i++)
      {
      wavepoint->sigqual[wavepoint->qualptr++]=0; /* If so, enter them as 0's */
      wavepoint->qualptr %=WAVEPOINT_HISTORY;    /* in the ringbuffer. */
      }
  wavepoint->last_seen=jiffies;                 /* Add beacon to history */
  wavepoint->last_seq=seq;    
  wavepoint->sigqual[wavepoint->qualptr++]=sigqual;          
  wavepoint->qualptr %=WAVEPOINT_HISTORY;
  ptr=(wavepoint->qualptr-WAVEPOINT_FAST_HISTORY+WAVEPOINT_HISTORY)%WAVEPOINT_HISTORY;
  
  for(i=0;i<WAVEPOINT_FAST_HISTORY;i++)       /* Update running averages */
    {
      average_fast+=wavepoint->sigqual[ptr++];
      ptr %=WAVEPOINT_HISTORY;
    }
  
  average_slow=average_fast;
  for(i=WAVEPOINT_FAST_HISTORY;i<WAVEPOINT_HISTORY;i++)
    {
      average_slow+=wavepoint->sigqual[ptr++];
      ptr %=WAVEPOINT_HISTORY;
    }
  
  wavepoint->average_fast=average_fast/WAVEPOINT_FAST_HISTORY;
  wavepoint->average_slow=average_slow/WAVEPOINT_HISTORY;   
}

/* Perform a handover to a new WavePoint */
void wv_roam_handover(wavepoint_history *wavepoint, net_local *lp)
{
  ioaddr_t              base = lp->dev->base_addr;  
  mm_t                  m;
  unsigned long         flags;

  if(wavepoint==lp->curr_point)          /* Sanity check... */
    {
      wv_nwid_filter(!NWID_PROMISC,lp);
      return;
    }
  
#ifdef WAVELAN_ROAMING_DEBUG
  printk(KERN_DEBUG "WaveLAN: Doing handover to %.4X, dev %s\n",wavepoint->nwid,lp->dev->name);
#endif
      
  /* Disable interrupts & save flags */
  wv_splhi(lp, &flags);

  m.w.mmw_netw_id_l = wavepoint->nwid & 0xFF;
  m.w.mmw_netw_id_h = (wavepoint->nwid & 0xFF00) >> 8;
  
  mmc_write(base, (char *)&m.w.mmw_netw_id_l - (char *)&m, (unsigned char *)&m.w.mmw_netw_id_l, 2);
  
  /* ReEnable interrupts & restore flags */
  wv_splx(lp, &flags);

  wv_nwid_filter(!NWID_PROMISC,lp);
  lp->curr_point=wavepoint;
}

/* Called when a WavePoint beacon is received */
static inline void wl_roam_gather(device *  dev,
                          u_char *  hdr,   /* Beacon header */
                          u_char *  stats) /* SNR, Signal quality 
                                          of packet */
{
  wavepoint_beacon *beacon= (wavepoint_beacon *)hdr; /* Rcvd. Beacon */
  unsigned short nwid=ntohs(beacon->nwid);  
  unsigned short sigqual=stats[2] & MMR_SGNL_QUAL;   /* SNR of beacon */
  wavepoint_history *wavepoint=NULL;                /* WavePoint table entry */
  net_local *lp=(net_local *)dev->priv;              /* Device info */

#ifdef I_NEED_THIS_FEATURE
  /* Some people don't need this, some other may need it */
  nwid=nwid^ntohs(beacon->domain_id);
#endif

#if WAVELAN_ROAMING_DEBUG > 1
  printk(KERN_DEBUG "WaveLAN: beacon, dev %s:\n",dev->name);
  printk(KERN_DEBUG "Domain: %.4X NWID: %.4X SigQual=%d\n",ntohs(beacon->domain_id),nwid,sigqual);
#endif
  
  lp->wavepoint_table.locked=1;                            /* <Mutex> */
  
  wavepoint=wl_roam_check(nwid,lp);            /* Find WavePoint table entry */
  if(wavepoint==NULL)                    /* If no entry, Create a new one... */
    {
      wavepoint=wl_new_wavepoint(nwid,beacon->seq,lp);
      if(wavepoint==NULL)
      goto out;
    }
  if(lp->curr_point==NULL)             /* If this is the only WavePoint, */
    wv_roam_handover(wavepoint, lp);               /* Jump on it! */
  
  wl_update_history(wavepoint, sigqual, beacon->seq); /* Update SNR history
                                           stats. */
  
  if(lp->curr_point->average_slow < SEARCH_THRESH_LOW) /* If our current */
    if(!lp->cell_search)                  /* WavePoint is getting faint, */
      wv_nwid_filter(NWID_PROMISC,lp);    /* start looking for a new one */
  
  if(wavepoint->average_slow > 
     lp->curr_point->average_slow + WAVELAN_ROAMING_DELTA)
    wv_roam_handover(wavepoint, lp);   /* Handover to a better WavePoint */
  
  if(lp->curr_point->average_slow > SEARCH_THRESH_HIGH) /* If our SNR is */
    if(lp->cell_search)  /* getting better, drop out of cell search mode */
      wv_nwid_filter(!NWID_PROMISC,lp);
  
out:
  lp->wavepoint_table.locked=0;                        /* </MUTEX>   :-) */
}

/* Test this MAC frame a WavePoint beacon */
static inline int WAVELAN_BEACON(unsigned char *data)
{
  wavepoint_beacon *beacon= (wavepoint_beacon *)data;
  static wavepoint_beacon beacon_template={0xaa,0xaa,0x03,0x08,0x00,0x0e,0x20,0x03,0x00};
  
  if(memcmp(beacon,&beacon_template,9)==0)
    return 1;
  else
    return 0;
}
#endif      /* WAVELAN_ROAMING */

/************************ I82593 SUBROUTINES *************************/
/*
 * Useful subroutines to manage the Ethernet controller
 */

/*------------------------------------------------------------------*/
/*
 * Routine to synchronously send a command to the i82593 chip. 
 * Should be called with interrupts disabled.
 * (called by wv_packet_write(), wv_ru_stop(), wv_ru_start(),
 *  wv_82593_config() & wv_diag())
 */
static int
wv_82593_cmd(device *   dev,
           char * str,
           int    cmd,
           int    result)
{
  ioaddr_t  base = dev->base_addr;
  int       status;
  int       wait_completed;
  long            spin;

  /* Spin until the chip finishes executing its current command (if any) */
  spin = 1000;
  do
    {
      /* Time calibration of the loop */
      udelay(10);

      /* Read the interrupt register */
      outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
      status = inb(LCSR(base));
    }
  while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0));

  /* If the interrupt hasn't be posted */
  if(spin <= 0)
    {
#ifdef DEBUG_INTERRUPT_ERROR
      printk(KERN_INFO "wv_82593_cmd: %s timeout (previous command), status 0x%02x\n",
           str, status);
#endif
      return(FALSE);
    }

  /* Issue the command to the controller */
  outb(cmd, LCCR(base));

  /* If we don't have to check the result of the command
   * Note : this mean that the irq handler will deal with that */
  if(result == SR0_NO_RESULT)
    return(TRUE);

  /* We are waiting for command completion */
  wait_completed = TRUE;

  /* Busy wait while the LAN controller executes the command. */
  spin = 1000;
  do
    {
      /* Time calibration of the loop */
      udelay(10);

      /* Read the interrupt register */
      outb(CR0_STATUS_0 | OP0_NOP, LCCR(base));
      status = inb(LCSR(base));

      /* Check if there was an interrupt posted */
      if((status & SR0_INTERRUPT))
      {
        /* Acknowledge the interrupt */
        outb(CR0_INT_ACK | OP0_NOP, LCCR(base));

        /* Check if interrupt is a command completion */
        if(((status & SR0_BOTH_RX_TX) != SR0_BOTH_RX_TX) &&
           ((status & SR0_BOTH_RX_TX) != 0x0) &&
           !(status & SR0_RECEPTION))
          {
            /* Signal command completion */
            wait_completed = FALSE;
          }
        else
          {
            /* Note : Rx interrupts will be handled later, because we can
             * handle multiple Rx packets at once */
#ifdef DEBUG_INTERRUPT_INFO
            printk(KERN_INFO "wv_82593_cmd: not our interrupt\n");
#endif
          }
      }
    }
  while(wait_completed && (spin-- > 0));

  /* If the interrupt hasn't be posted */
  if(wait_completed)
    {
#ifdef DEBUG_INTERRUPT_ERROR
      printk(KERN_INFO "wv_82593_cmd: %s timeout, status 0x%02x\n",
           str, status);
#endif
      return(FALSE);
    }

  /* Check the return code returned by the card (see above) against
   * the expected return code provided by the caller */
  if((status & SR0_EVENT_MASK) != result)
    {
#ifdef DEBUG_INTERRUPT_ERROR
      printk(KERN_INFO "wv_82593_cmd: %s failed, status = 0x%x\n",
           str, status);
#endif
      return(FALSE);
    }

  return(TRUE);
} /* wv_82593_cmd */

/*------------------------------------------------------------------*/
/*
 * This routine does a 593 op-code number 7, and obtains the diagnose
 * status for the WaveLAN.
 */
static inline int
wv_diag(device *  dev)
{
  int       ret = FALSE;

  if(wv_82593_cmd(dev, "wv_diag(): diagnose",
              OP0_DIAGNOSE, SR0_DIAGNOSE_PASSED))
    ret = TRUE;

#ifdef DEBUG_CONFIG_ERROR
  printk(KERN_INFO "wavelan_cs: i82593 Self Test failed!\n");
#endif
  return(ret);
} /* wv_diag */

/*------------------------------------------------------------------*/
/*
 * Routine to read len bytes from the i82593's ring buffer, starting at
 * chip address addr. The results read from the chip are stored in buf.
 * The return value is the address to use for next the call.
 */
static int
read_ringbuf(device *   dev,
           int    addr,
           char * buf,
           int    len)
{
  ioaddr_t  base = dev->base_addr;
  int       ring_ptr = addr;
  int       chunk_len;
  char *    buf_ptr = buf;

  /* Get all the buffer */
  while(len > 0)
    {
      /* Position the Program I/O Register at the ring buffer pointer */
      outb(ring_ptr & 0xff, PIORL(base));
      outb(((ring_ptr >> 8) & PIORH_MASK), PIORH(base));

      /* First, determine how much we can read without wrapping around the
       ring buffer */
      if((addr + len) < (RX_BASE + RX_SIZE))
      chunk_len = len;
      else
      chunk_len = RX_BASE + RX_SIZE - addr;
      insb(PIOP(base), buf_ptr, chunk_len);
      buf_ptr += chunk_len;
      len -= chunk_len;
      ring_ptr = (ring_ptr - RX_BASE + chunk_len) % RX_SIZE + RX_BASE;
    }
  return(ring_ptr);
} /* read_ringbuf */

/*------------------------------------------------------------------*/
/*
 * Reconfigure the i82593, or at least ask for it...
 * Because wv_82593_config use the transmission buffer, we must do it
 * when we are sure that there is no transmission, so we do it now
 * or in wavelan_packet_xmit() (I can't find any better place,
 * wavelan_interrupt is not an option...), so you may experience
 * some delay sometime...
 */
static inline void
wv_82593_reconfig(device *    dev)
{
  net_local *           lp = (net_local *)dev->priv;
  dev_link_t *          link = ((net_local *) dev->priv)->link;
  unsigned long         flags;

  /* Arm the flag, will be cleard in wv_82593_config() */
  lp->reconfig_82593 = TRUE;

  /* Check if we can do it now ! */
  if((link->open) && (netif_running(dev)) && !(netif_queue_stopped(dev)))
    {
      wv_splhi(lp, &flags);   /* Disable interrupts */
      wv_82593_config(dev);
      wv_splx(lp, &flags);    /* Re-enable interrupts */
    }
  else
    {
#ifdef DEBUG_IOCTL_INFO
      printk(KERN_DEBUG
           "%s: wv_82593_reconfig(): delayed (state = %lX, link = %d)\n",
           dev->name, devstate(dev), link->open);
#endif
    }
}

/********************* DEBUG & INFO SUBROUTINES *********************/
/*
 * This routines are used in the code to show debug informations.
 * Most of the time, it dump the content of hardware structures...
 */

#ifdef DEBUG_PSA_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the formatted contents of the Parameter Storage Area.
 */
static void
wv_psa_show(psa_t *     p)
{
  printk(KERN_DEBUG "##### wavelan psa contents: #####\n");
  printk(KERN_DEBUG "psa_io_base_addr_1: 0x%02X %02X %02X %02X\n",
       p->psa_io_base_addr_1,
       p->psa_io_base_addr_2,
       p->psa_io_base_addr_3,
       p->psa_io_base_addr_4);
  printk(KERN_DEBUG "psa_rem_boot_addr_1: 0x%02X %02X %02X\n",
       p->psa_rem_boot_addr_1,
       p->psa_rem_boot_addr_2,
       p->psa_rem_boot_addr_3);
  printk(KERN_DEBUG "psa_holi_params: 0x%02x, ", p->psa_holi_params);
  printk("psa_int_req_no: %d\n", p->psa_int_req_no);
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "psa_unused0[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
       p->psa_unused0[0],
       p->psa_unused0[1],
       p->psa_unused0[2],
       p->psa_unused0[3],
       p->psa_unused0[4],
       p->psa_unused0[5],
       p->psa_unused0[6]);
#endif      /* DEBUG_SHOW_UNUSED */
  printk(KERN_DEBUG "psa_univ_mac_addr[]: %02x:%02x:%02x:%02x:%02x:%02x\n",
       p->psa_univ_mac_addr[0],
       p->psa_univ_mac_addr[1],
       p->psa_univ_mac_addr[2],
       p->psa_univ_mac_addr[3],
       p->psa_univ_mac_addr[4],
       p->psa_univ_mac_addr[5]);
  printk(KERN_DEBUG "psa_local_mac_addr[]: %02x:%02x:%02x:%02x:%02x:%02x\n",
       p->psa_local_mac_addr[0],
       p->psa_local_mac_addr[1],
       p->psa_local_mac_addr[2],
       p->psa_local_mac_addr[3],
       p->psa_local_mac_addr[4],
       p->psa_local_mac_addr[5]);
  printk(KERN_DEBUG "psa_univ_local_sel: %d, ", p->psa_univ_local_sel);
  printk("psa_comp_number: %d, ", p->psa_comp_number);
  printk("psa_thr_pre_set: 0x%02x\n", p->psa_thr_pre_set);
  printk(KERN_DEBUG "psa_feature_select/decay_prm: 0x%02x, ",
       p->psa_feature_select);
  printk("psa_subband/decay_update_prm: %d\n", p->psa_subband);
  printk(KERN_DEBUG "psa_quality_thr: 0x%02x, ", p->psa_quality_thr);
  printk("psa_mod_delay: 0x%02x\n", p->psa_mod_delay);
  printk(KERN_DEBUG "psa_nwid: 0x%02x%02x, ", p->psa_nwid[0], p->psa_nwid[1]);
  printk("psa_nwid_select: %d\n", p->psa_nwid_select);
  printk(KERN_DEBUG "psa_encryption_select: %d, ", p->psa_encryption_select);
  printk("psa_encryption_key[]: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
       p->psa_encryption_key[0],
       p->psa_encryption_key[1],
       p->psa_encryption_key[2],
       p->psa_encryption_key[3],
       p->psa_encryption_key[4],
       p->psa_encryption_key[5],
       p->psa_encryption_key[6],
       p->psa_encryption_key[7]);
  printk(KERN_DEBUG "psa_databus_width: %d\n", p->psa_databus_width);
  printk(KERN_DEBUG "psa_call_code/auto_squelch: 0x%02x, ",
       p->psa_call_code[0]);
  printk("psa_call_code[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
       p->psa_call_code[0],
       p->psa_call_code[1],
       p->psa_call_code[2],
       p->psa_call_code[3],
       p->psa_call_code[4],
       p->psa_call_code[5],
       p->psa_call_code[6],
       p->psa_call_code[7]);
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "psa_reserved[]: %02X:%02X:%02X:%02X\n",
       p->psa_reserved[0],
       p->psa_reserved[1],
       p->psa_reserved[2],
       p->psa_reserved[3]);
#endif      /* DEBUG_SHOW_UNUSED */
  printk(KERN_DEBUG "psa_conf_status: %d, ", p->psa_conf_status);
  printk("psa_crc: 0x%02x%02x, ", p->psa_crc[0], p->psa_crc[1]);
  printk("psa_crc_status: 0x%02x\n", p->psa_crc_status);
} /* wv_psa_show */
#endif      /* DEBUG_PSA_SHOW */

#ifdef DEBUG_MMC_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the formatted status of the Modem Management Controller.
 * This function need to be completed...
 */
static void
wv_mmc_show(device *    dev)
{
  ioaddr_t  base = dev->base_addr;
  net_local *     lp = (net_local *)dev->priv;
  mmr_t           m;

  /* Basic check */
  if(hasr_read(base) & HASR_NO_CLK)
    {
      printk(KERN_WARNING "%s: wv_mmc_show: modem not connected\n",
           dev->name);
      return;
    }

  wv_splhi(lp, &flags);

  /* Read the mmc */
  mmc_out(base, mmwoff(0, mmw_freeze), 1);
  mmc_read(base, 0, (u_char *)&m, sizeof(m));
  mmc_out(base, mmwoff(0, mmw_freeze), 0);

#ifdef WIRELESS_EXT     /* If wireless extension exist in the kernel */
  /* Don't forget to update statistics */
  lp->wstats.discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l;
#endif      /* WIRELESS_EXT */

  wv_splx(lp, &flags);

  printk(KERN_DEBUG "##### wavelan modem status registers: #####\n");
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "mmc_unused0[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
       m.mmr_unused0[0],
       m.mmr_unused0[1],
       m.mmr_unused0[2],
       m.mmr_unused0[3],
       m.mmr_unused0[4],
       m.mmr_unused0[5],
       m.mmr_unused0[6],
       m.mmr_unused0[7]);
#endif      /* DEBUG_SHOW_UNUSED */
  printk(KERN_DEBUG "Encryption algorythm: %02X - Status: %02X\n",
       m.mmr_des_avail, m.mmr_des_status);
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "mmc_unused1[]: %02X:%02X:%02X:%02X:%02X\n",
       m.mmr_unused1[0],
       m.mmr_unused1[1],
       m.mmr_unused1[2],
       m.mmr_unused1[3],
       m.mmr_unused1[4]);
#endif      /* DEBUG_SHOW_UNUSED */
  printk(KERN_DEBUG "dce_status: 0x%x [%s%s%s%s]\n",
       m.mmr_dce_status,
       (m.mmr_dce_status & MMR_DCE_STATUS_RX_BUSY) ? "energy detected,":"",
       (m.mmr_dce_status & MMR_DCE_STATUS_LOOPT_IND) ?
       "loop test indicated," : "",
       (m.mmr_dce_status & MMR_DCE_STATUS_TX_BUSY) ? "transmitter on," : "",
       (m.mmr_dce_status & MMR_DCE_STATUS_JBR_EXPIRED) ?
       "jabber timer expired," : "");
  printk(KERN_DEBUG "Dsp ID: %02X\n",
       m.mmr_dsp_id);
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "mmc_unused2[]: %02X:%02X\n",
       m.mmr_unused2[0],
       m.mmr_unused2[1]);
#endif      /* DEBUG_SHOW_UNUSED */
  printk(KERN_DEBUG "# correct_nwid: %d, # wrong_nwid: %d\n",
       (m.mmr_correct_nwid_h << 8) | m.mmr_correct_nwid_l,
       (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l);
  printk(KERN_DEBUG "thr_pre_set: 0x%x [current signal %s]\n",
       m.mmr_thr_pre_set & MMR_THR_PRE_SET,
       (m.mmr_thr_pre_set & MMR_THR_PRE_SET_CUR) ? "above" : "below");
  printk(KERN_DEBUG "signal_lvl: %d [%s], ",
       m.mmr_signal_lvl & MMR_SIGNAL_LVL,
       (m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) ? "new msg" : "no new msg");
  printk("silence_lvl: %d [%s], ", m.mmr_silence_lvl & MMR_SILENCE_LVL,
       (m.mmr_silence_lvl & MMR_SILENCE_LVL_VALID) ? "update done" : "no new update");
  printk("sgnl_qual: 0x%x [%s]\n", m.mmr_sgnl_qual & MMR_SGNL_QUAL,
       (m.mmr_sgnl_qual & MMR_SGNL_QUAL_ANT) ? "Antenna 1" : "Antenna 0");
#ifdef DEBUG_SHOW_UNUSED
  printk(KERN_DEBUG "netw_id_l: %x\n", m.mmr_netw_id_l);
#endif      /* DEBUG_SHOW_UNUSED */
} /* wv_mmc_show */
#endif      /* DEBUG_MMC_SHOW */

#ifdef DEBUG_I82593_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the formatted status of the i82593's receive unit.
 */
static void
wv_ru_show(device *     dev)
{
  net_local *lp = (net_local *) dev->priv;

  printk(KERN_DEBUG "##### wavelan i82593 receiver status: #####\n");
  printk(KERN_DEBUG "ru: rfp %d stop %d", lp->rfp, lp->stop);
  /*
   * Not implemented yet...
   */
  printk("\n");
} /* wv_ru_show */
#endif      /* DEBUG_I82593_SHOW */

#ifdef DEBUG_DEVICE_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the formatted status of the WaveLAN PCMCIA device driver.
 */
static void
wv_dev_show(device *    dev)
{
  printk(KERN_DEBUG "dev:");
  printk(" state=%lX,", devstate(dev));
  printk(" trans_start=%ld,", dev->trans_start);
  printk(" flags=0x%x,", dev->flags);
  printk("\n");
} /* wv_dev_show */

/*------------------------------------------------------------------*/
/*
 * Print the formatted status of the WaveLAN PCMCIA device driver's
 * private information.
 */
static void
wv_local_show(device *  dev)
{
  net_local *lp;

  lp = (net_local *)dev->priv;

  printk(KERN_DEBUG "local:");
  /*
   * Not implemented yet...
   */
  printk("\n");
} /* wv_local_show */
#endif      /* DEBUG_DEVICE_SHOW */

#if defined(DEBUG_RX_INFO) || defined(DEBUG_TX_INFO)
/*------------------------------------------------------------------*/
/*
 * Dump packet header (and content if necessary) on the screen
 */
static inline void
wv_packet_info(u_char *       p,          /* Packet to dump */
             int        length,           /* Length of the packet */
             char *           msg1,       /* Name of the device */
             char *           msg2)       /* Name of the function */
{
  int       i;
  int       maxi;

  printk(KERN_DEBUG "%s: %s(): dest %02X:%02X:%02X:%02X:%02X:%02X, length %d\n",
       msg1, msg2, p[0], p[1], p[2], p[3], p[4], p[5], length);
  printk(KERN_DEBUG "%s: %s(): src %02X:%02X:%02X:%02X:%02X:%02X, type 0x%02X%02X\n",
       msg1, msg2, p[6], p[7], p[8], p[9], p[10], p[11], p[12], p[13]);

#ifdef DEBUG_PACKET_DUMP

  printk(KERN_DEBUG "data=\"");

  if((maxi = length) > DEBUG_PACKET_DUMP)
    maxi = DEBUG_PACKET_DUMP;
  for(i = 14; i < maxi; i++)
    if(p[i] >= ' ' && p[i] <= '~')
      printk(" %c", p[i]);
    else
      printk("%02X", p[i]);
  if(maxi < length)
    printk("..");
  printk("\"\n");
  printk(KERN_DEBUG "\n");
#endif      /* DEBUG_PACKET_DUMP */
}
#endif      /* defined(DEBUG_RX_INFO) || defined(DEBUG_TX_INFO) */

/*------------------------------------------------------------------*/
/*
 * This is the information which is displayed by the driver at startup
 * There  is a lot of flag to configure it at your will...
 */
static inline void
wv_init_info(device *   dev)
{
  ioaddr_t  base = dev->base_addr;
  psa_t           psa;
  int       i;

  /* Read the parameter storage area */
  psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa));

#ifdef DEBUG_PSA_SHOW
  wv_psa_show(&psa);
#endif
#ifdef DEBUG_MMC_SHOW
  wv_mmc_show(dev);
#endif
#ifdef DEBUG_I82593_SHOW
  wv_ru_show(dev);
#endif

#ifdef DEBUG_BASIC_SHOW
  /* Now, let's go for the basic stuff */
  printk(KERN_NOTICE "%s: WaveLAN: port %#x, irq %d, hw_addr",
       dev->name, base, dev->irq);
  for(i = 0; i < WAVELAN_ADDR_SIZE; i++)
    printk("%s%02X", (i == 0) ? " " : ":", dev->dev_addr[i]);

  /* Print current network id */
  if(psa.psa_nwid_select)
    printk(", nwid 0x%02X-%02X", psa.psa_nwid[0], psa.psa_nwid[1]);
  else
    printk(", nwid off");

  /* If 2.00 card */
  if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
       (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
    {
      unsigned short    freq;

      /* Ask the EEprom to read the frequency from the first area */
      fee_read(base, 0x00 /* 1st area - frequency... */,
             &freq, 1);

      /* Print frequency */
      printk(", 2.00, %ld", (freq >> 6) + 2400L);

      /* Hack !!! */
      if(freq & 0x20)
      printk(".5");
    }
  else
    {
      printk(", PCMCIA, ");
      switch (psa.psa_subband)
      {
      case PSA_SUBBAND_915:
        printk("915");
        break;
      case PSA_SUBBAND_2425:
        printk("2425");
        break;
      case PSA_SUBBAND_2460:
        printk("2460");
        break;
      case PSA_SUBBAND_2484:
        printk("2484");
        break;
      case PSA_SUBBAND_2430_5:
        printk("2430.5");
        break;
      default:
        printk("unknown");
      }
    }

  printk(" MHz\n");
#endif      /* DEBUG_BASIC_SHOW */

#ifdef DEBUG_VERSION_SHOW
  /* Print version information */
  printk(KERN_NOTICE "%s", version);
#endif
} /* wv_init_info */

/********************* IOCTL, STATS & RECONFIG *********************/
/*
 * We found here routines that are called by Linux on differents
 * occasions after the configuration and not for transmitting data
 * These may be called when the user use ifconfig, /proc/net/dev
 * or wireless extensions
 */

/*------------------------------------------------------------------*/
/*
 * Get the current ethernet statistics. This may be called with the
 * card open or closed.
 * Used when the user read /proc/net/dev
 */
static en_stats   *
wavelan_get_stats(device *    dev)
{
#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: <>wavelan_get_stats()\n", dev->name);
#endif

  return(&((net_local *) dev->priv)->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
wavelan_set_multicast_list(device * dev)
{
  net_local *     lp = (net_local *) dev->priv;

#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_set_multicast_list()\n", dev->name);
#endif

#ifdef DEBUG_IOCTL_INFO
  printk(KERN_DEBUG "%s: wavelan_set_multicast_list(): setting Rx mode %02X to %d addresses.\n",
       dev->name, dev->flags, dev->mc_count);
#endif

  if(dev->flags & IFF_PROMISC)
    {
      /*
       * Enable promiscuous mode: receive all packets.
       */
      if(!lp->promiscuous)
      {
        lp->promiscuous = 1;
        lp->allmulticast = 0;
        lp->mc_count = 0;

        wv_82593_reconfig(dev);

        /* Tell the kernel that we are doing a really bad job... */
        dev->flags |= IFF_PROMISC;
      }
    }
  else
    /* If all multicast addresses
     * or too much multicast addresses for the hardware filter */
    if((dev->flags & IFF_ALLMULTI) ||
       (dev->mc_count > I82593_MAX_MULTICAST_ADDRESSES))
      {
      /*
       * Disable promiscuous mode, but active the all multicast mode
       */
      if(!lp->allmulticast)
        {
          lp->promiscuous = 0;
          lp->allmulticast = 1;
          lp->mc_count = 0;

          wv_82593_reconfig(dev);

          /* Tell the kernel that we are doing a really bad job... */
          dev->flags |= IFF_ALLMULTI;
        }
      }
    else
      /* If there is some multicast addresses to send */
      if(dev->mc_list != (struct dev_mc_list *) NULL)
      {
        /*
         * Disable promiscuous mode, but receive all packets
         * in multicast list
         */
#ifdef MULTICAST_AVOID
        if(lp->promiscuous || lp->allmulticast ||
           (dev->mc_count != lp->mc_count))
#endif
          {
            lp->promiscuous = 0;
            lp->allmulticast = 0;
            lp->mc_count = dev->mc_count;

            wv_82593_reconfig(dev);
          }
      }
      else
      {
        /*
         * Switch to normal mode: disable promiscuous mode and 
         * clear the multicast list.
         */
        if(lp->promiscuous || lp->mc_count == 0)
          {
            lp->promiscuous = 0;
            lp->allmulticast = 0;
            lp->mc_count = 0;

            wv_82593_reconfig(dev);
          }
      }
#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_set_multicast_list()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * This function doesn't exist...
 * (Note : it was a nice way to test the reconfigure stuff...)
 */
#ifdef SET_MAC_ADDRESS
static int
wavelan_set_mac_address(device *    dev,
                  void *            addr)
{
  struct sockaddr *     mac = addr;

  /* Copy the address */
  memcpy(dev->dev_addr, mac->sa_data, WAVELAN_ADDR_SIZE);

  /* Reconfig the beast */
  wv_82593_reconfig(dev);

  return 0;
}
#endif      /* SET_MAC_ADDRESS */

#ifdef WIRELESS_EXT     /* If wireless extension exist in the kernel */

/*------------------------------------------------------------------*/
/*
 * Frequency setting (for hardware able of it)
 * It's a bit complicated and you don't really want to look into it...
 * (called in wavelan_ioctl)
 */
static inline int
wv_set_frequency(u_long       base, /* i/o port of the card */
             iw_freq *  frequency)
{
  const int BAND_NUM = 10;    /* Number of bands */
  long            freq = 0L;  /* offset to 2.4 GHz in .5 MHz */
#ifdef DEBUG_IOCTL_INFO
  int       i;
#endif

  /* Setting by frequency */
  /* Theoritically, you may set any frequency between
   * the two limits with a 0.5 MHz precision. In practice,
   * I don't want you to have trouble with local
   * regulations... */
  if((frequency->e == 1) &&
     (frequency->m >= (int) 2.412e8) && (frequency->m <= (int) 2.487e8))
    {
      freq = ((frequency->m / 10000) - 24000L) / 5;
    }

  /* Setting by channel (same as wfreqsel) */
  /* Warning : each channel is 22MHz wide, so some of the channels
   * will interfere... */
  if((frequency->e == 0) &&
     (frequency->m >= 0) && (frequency->m < BAND_NUM))
    {
      /* Get frequency offset. */
      freq = channel_bands[frequency->m] >> 1;
    }

  /* Verify if the frequency is allowed */
  if(freq != 0L)
    {
      u_short     table[10];  /* Authorized frequency table */

      /* Read the frequency table */
      fee_read(base, 0x71 /* frequency table */,
             table, 10);

#ifdef DEBUG_IOCTL_INFO
      printk(KERN_DEBUG "Frequency table :");
      for(i = 0; i < 10; i++)
      {
        printk(" %04X",
             table[i]);
      }
      printk("\n");
#endif

      /* Look in the table if the frequency is allowed */
      if(!(table[9 - ((freq - 24) / 16)] &
         (1 << ((freq - 24) % 16))))
      return -EINVAL;         /* not allowed */
    }
  else
    return -EINVAL;

  /* If we get a usable frequency */
  if(freq != 0L)
    {
      unsigned short    area[16];
      unsigned short    dac[2];
      unsigned short    area_verify[16];
      unsigned short    dac_verify[2];
      /* Corresponding gain (in the power adjust value table)
       * see AT&T Wavelan Data Manual, REF 407-024689/E, page 3-8
       * & WCIN062D.DOC, page 6.2.9 */
      unsigned short    power_limit[] = { 40, 80, 120, 160, 0 };
      int         power_band = 0;         /* Selected band */
      unsigned short    power_adjust;           /* Correct value */

      /* Search for the gain */
      power_band = 0;
      while((freq > power_limit[power_band]) &&
          (power_limit[++power_band] != 0))
      ;

      /* Read the first area */
      fee_read(base, 0x00,
             area, 16);

      /* Read the DAC */
      fee_read(base, 0x60,
             dac, 2);

      /* Read the new power adjust value */
      fee_read(base, 0x6B - (power_band >> 1),
             &power_adjust, 1);
      if(power_band & 0x1)
      power_adjust >>= 8;
      else
      power_adjust &= 0xFF;

#ifdef DEBUG_IOCTL_INFO
      printk(KERN_DEBUG "Wavelan EEprom Area 1 :");
      for(i = 0; i < 16; i++)
      {
        printk(" %04X",
             area[i]);
      }
      printk("\n");

      printk(KERN_DEBUG "Wavelan EEprom DAC : %04X %04X\n",
           dac[0], dac[1]);
#endif

      /* Frequency offset (for info only...) */
      area[0] = ((freq << 5) & 0xFFE0) | (area[0] & 0x1F);

      /* Receiver Principle main divider coefficient */
      area[3] = (freq >> 1) + 2400L - 352L;
      area[2] = ((freq & 0x1) << 4) | (area[2] & 0xFFEF);

      /* Transmitter Main divider coefficient */
      area[13] = (freq >> 1) + 2400L;
      area[12] = ((freq & 0x1) << 4) | (area[2] & 0xFFEF);

      /* Others part of the area are flags, bit streams or unused... */

      /* Set the value in the DAC */
      dac[1] = ((power_adjust >> 1) & 0x7F) | (dac[1] & 0xFF80);
      dac[0] = ((power_adjust & 0x1) << 4) | (dac[0] & 0xFFEF);

      /* Write the first area */
      fee_write(base, 0x00,
            area, 16);

      /* Write the DAC */
      fee_write(base, 0x60,
            dac, 2);

      /* We now should verify here that the EEprom writting was ok */

      /* ReRead the first area */
      fee_read(base, 0x00,
             area_verify, 16);

      /* ReRead the DAC */
      fee_read(base, 0x60,
             dac_verify, 2);

      /* Compare */
      if(memcmp(area, area_verify, 16 * 2) ||
       memcmp(dac, dac_verify, 2 * 2))
      {
#ifdef DEBUG_IOCTL_ERROR
        printk(KERN_INFO "Wavelan: wv_set_frequency : unable to write new frequency to EEprom (?)\n");
#endif
        return -EOPNOTSUPP;
      }

      /* We must download the frequency parameters to the
       * synthetisers (from the EEprom - area 1)
       * Note : as the EEprom is auto decremented, we set the end
       * if the area... */
      mmc_out(base, mmwoff(0, mmw_fee_addr), 0x0F);
      mmc_out(base, mmwoff(0, mmw_fee_ctrl),
            MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD);

      /* Wait until the download is finished */
      fee_wait(base, 100, 100);

      /* We must now download the power adjust value (gain) to
       * the synthetisers (from the EEprom - area 7 - DAC) */
      mmc_out(base, mmwoff(0, mmw_fee_addr), 0x61);
      mmc_out(base, mmwoff(0, mmw_fee_ctrl),
            MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD);

      /* Wait until the download is finished */
      fee_wait(base, 100, 100);

#ifdef DEBUG_IOCTL_INFO
      /* Verification of what we have done... */

      printk(KERN_DEBUG "Wavelan EEprom Area 1 :");
      for(i = 0; i < 16; i++)
      {
        printk(" %04X",
             area_verify[i]);
      }
      printk("\n");

      printk(KERN_DEBUG "Wavelan EEprom DAC : %04X %04X\n",
           dac_verify[0], dac_verify[1]);
#endif

      return 0;
    }
  else
    return -EINVAL;           /* Bah, never get there... */
}

/*------------------------------------------------------------------*/
/*
 * Give the list of available frequencies
 */
static inline int
wv_frequency_list(u_long      base, /* i/o port of the card */
              iw_freq * list, /* List of frequency to fill */
              int       max)  /* Maximum number of frequencies */
{
  u_short   table[10];  /* Authorized frequency table */
  long            freq = 0L;  /* offset to 2.4 GHz in .5 MHz + 12 MHz */
  int       i;          /* index in the table */
#if WIRELESS_EXT > 7
  const int BAND_NUM = 10;    /* Number of bands */
  int       c = 0;            /* Channel number */
#endif /* WIRELESS_EXT */

  /* Read the frequency table */
  fee_read(base, 0x71 /* frequency table */,
         table, 10);

  /* Look all frequencies */
  i = 0;
  for(freq = 0; freq < 150; freq++)
    /* Look in the table if the frequency is allowed */
    if(table[9 - (freq / 16)] & (1 << (freq % 16)))
      {
#if WIRELESS_EXT > 7
      /* Compute approximate channel number */
      while((((channel_bands[c] >> 1) - 24) < freq) &&
            (c < BAND_NUM))
        c++;
      list[i].i = c;    /* Set the list index */
#endif /* WIRELESS_EXT */

      /* put in the list */
      list[i].m = (((freq + 24) * 5) + 24000L) * 10000;
      list[i++].e = 1;

      /* Check number */
      if(i >= max)
        return(i);
      }

  return(i);
}

#ifdef WIRELESS_SPY
/*------------------------------------------------------------------*/
/*
 * Gather wireless spy statistics : for each packet, compare the source
 * address with out list, and if match, get the stats...
 * Sorry, but this function really need wireless extensions...
 */
static inline void
wl_spy_gather(device *  dev,
            u_char *    mac,        /* MAC address */
            u_char *    stats)            /* Statistics to gather */
{
  net_local *     lp = (net_local *) dev->priv;
  int       i;

  /* Look all addresses */
  for(i = 0; i < lp->spy_number; i++)
    /* If match */
    if(!memcmp(mac, lp->spy_address[i], WAVELAN_ADDR_SIZE))
      {
      /* Update statistics */
      lp->spy_stat[i].qual = stats[2] & MMR_SGNL_QUAL;
      lp->spy_stat[i].level = stats[0] & MMR_SIGNAL_LVL;
      lp->spy_stat[i].noise = stats[1] & MMR_SILENCE_LVL;
      lp->spy_stat[i].updated = 0x7;
      }
}
#endif      /* WIRELESS_SPY */

#ifdef HISTOGRAM
/*------------------------------------------------------------------*/
/*
 * This function calculate an histogram on the signal level.
 * As the noise is quite constant, it's like doing it on the SNR.
 * We have defined a set of interval (lp->his_range), and each time
 * the level goes in that interval, we increment the count (lp->his_sum).
 * With this histogram you may detect if one wavelan is really weak,
 * or you may also calculate the mean and standard deviation of the level...
 */
static inline void
wl_his_gather(device *  dev,
            u_char *    stats)            /* Statistics to gather */
{
  net_local *     lp = (net_local *) dev->priv;
  u_char    level = stats[0] & MMR_SIGNAL_LVL;
  int       i;

  /* Find the correct interval */
  i = 0;
  while((i < (lp->his_number - 1)) && (level >= lp->his_range[i++]))
    ;

  /* Increment interval counter */
  (lp->his_sum[i])++;
}
#endif      /* HISTOGRAM */

/*------------------------------------------------------------------*/
/*
 * Perform ioctl : config & info stuff
 * This is here that are treated the wireless extensions (iwconfig)
 */
static int
wavelan_ioctl(struct net_device *   dev,  /* Device on wich the ioctl apply */
            struct ifreq *    rq,   /* Data passed */
            int         cmd)  /* Ioctl number */
{
  ioaddr_t        base = dev->base_addr;
  net_local *           lp = (net_local *)dev->priv;  /* lp is not unused */
  struct iwreq *  wrq = (struct iwreq *) rq;
  psa_t                 psa;
  mm_t                  m;
  unsigned long         flags;
  int             ret = 0;

#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_ioctl(cmd=0x%X)\n", dev->name, cmd);
#endif

  /* Disable interrupts & save flags */
  wv_splhi(lp, &flags);

  /* Look what is the request */
  switch(cmd)
    {
      /* --------------- WIRELESS EXTENSIONS --------------- */

    case SIOCGIWNAME:
      strcpy(wrq->u.name, "Wavelan");
      break;

    case SIOCSIWNWID:
      /* Set NWID in wavelan */
#if WIRELESS_EXT > 8
      if(!wrq->u.nwid.disabled)
      {
        /* Set NWID in psa */
        psa.psa_nwid[0] = (wrq->u.nwid.value & 0xFF00) >> 8;
        psa.psa_nwid[1] = wrq->u.nwid.value & 0xFF;
#else /* WIRELESS_EXT > 8 */
      if(wrq->u.nwid.on)
      {
        /* Set NWID in psa */
        psa.psa_nwid[0] = (wrq->u.nwid.nwid & 0xFF00) >> 8;
        psa.psa_nwid[1] = wrq->u.nwid.nwid & 0xFF;
#endif      /* WIRELESS_EXT > 8 */
        psa.psa_nwid_select = 0x01;
        psa_write(dev, (char *)psa.psa_nwid - (char *)&psa,
                (unsigned char *)psa.psa_nwid, 3);

        /* Set NWID in mmc */
        m.w.mmw_netw_id_l = psa.psa_nwid[1];
        m.w.mmw_netw_id_h = psa.psa_nwid[0];
        mmc_write(base, (char *)&m.w.mmw_netw_id_l - (char *)&m,
                (unsigned char *)&m.w.mmw_netw_id_l, 2);
        mmc_out(base, mmwoff(0, mmw_loopt_sel), 0x00);
      }
      else
      {
        /* Disable nwid in the psa */
        psa.psa_nwid_select = 0x00;
        psa_write(dev, (char *)&psa.psa_nwid_select - (char *)&psa,
                (unsigned char *)&psa.psa_nwid_select, 1);

        /* Disable nwid in the mmc (no filtering) */
        mmc_out(base, mmwoff(0, mmw_loopt_sel), MMW_LOOPT_SEL_DIS_NWID);
      }
      /* update the Wavelan checksum */
      update_psa_checksum(dev);
      break;

    case SIOCGIWNWID:
      /* Read the NWID */
      psa_read(dev, (char *)psa.psa_nwid - (char *)&psa,
             (unsigned char *)psa.psa_nwid, 3);
#if WIRELESS_EXT > 8
      wrq->u.nwid.value = (psa.psa_nwid[0] << 8) + psa.psa_nwid[1];
      wrq->u.nwid.disabled = !(psa.psa_nwid_select);
      wrq->u.nwid.fixed = 1;  /* Superfluous */
#else /* WIRELESS_EXT > 8 */
      wrq->u.nwid.nwid = (psa.psa_nwid[0] << 8) + psa.psa_nwid[1];
      wrq->u.nwid.on = psa.psa_nwid_select;
#endif      /* WIRELESS_EXT > 8 */
      break;

    case SIOCSIWFREQ:
      /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable) */
      if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
         (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
      ret = wv_set_frequency(base, &(wrq->u.freq));
      else
      ret = -EOPNOTSUPP;
      break;

    case SIOCGIWFREQ:
      /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable)
       * (does it work for everybody ? - especially old cards...) */
      if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
         (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
      {
        unsigned short  freq;

        /* Ask the EEprom to read the frequency from the first area */
        fee_read(base, 0x00 /* 1st area - frequency... */,
               &freq, 1);
        wrq->u.freq.m = ((freq >> 5) * 5 + 24000L) * 10000;
        wrq->u.freq.e = 1;
      }
      else
      {
        psa_read(dev, (char *)&psa.psa_subband - (char *)&psa,
               (unsigned char *)&psa.psa_subband, 1);

        if(psa.psa_subband <= 4)
          {
            wrq->u.freq.m = fixed_bands[psa.psa_subband];
            wrq->u.freq.e = (psa.psa_subband != 0);
          }
        else
          ret = -EOPNOTSUPP;
      }
      break;

    case SIOCSIWSENS:
      /* Set the level threshold */
#if WIRELESS_EXT > 7
      /* We should complain loudly if wrq->u.sens.fixed = 0, because we
       * can't set auto mode... */
      psa.psa_thr_pre_set = wrq->u.sens.value & 0x3F;
#else /* WIRELESS_EXT > 7 */
      psa.psa_thr_pre_set = wrq->u.sensitivity & 0x3F;
#endif      /* WIRELESS_EXT > 7 */
      psa_write(dev, (char *)&psa.psa_thr_pre_set - (char *)&psa,
             (unsigned char *)&psa.psa_thr_pre_set, 1);
      /* update the Wavelan checksum */
      update_psa_checksum(dev);
      mmc_out(base, mmwoff(0, mmw_thr_pre_set), psa.psa_thr_pre_set);
      break;

    case SIOCGIWSENS:
      /* Read the level threshold */
      psa_read(dev, (char *)&psa.psa_thr_pre_set - (char *)&psa,
             (unsigned char *)&psa.psa_thr_pre_set, 1);
#if WIRELESS_EXT > 7
      wrq->u.sens.value = psa.psa_thr_pre_set & 0x3F;
      wrq->u.sens.fixed = 1;
#else /* WIRELESS_EXT > 7 */
      wrq->u.sensitivity = psa.psa_thr_pre_set & 0x3F;
#endif      /* WIRELESS_EXT > 7 */
      break;

#if WIRELESS_EXT > 8
    case SIOCSIWENCODE:
      /* Set encryption key */
      if(!mmc_encr(base))
      {
        ret = -EOPNOTSUPP;
        break;
      }

      /* Basic checking... */
      if(wrq->u.encoding.pointer != (caddr_t) 0)
      {
        /* Check the size of the key */
        if(wrq->u.encoding.length != 8)
          {
            ret = -EINVAL;
            break;
          }

        /* Copy the key in the driver */
        if(copy_from_user(psa.psa_encryption_key, wrq->u.encoding.pointer,
                      wrq->u.encoding.length))
          {
            ret = -EFAULT;
            break;
          }

        psa.psa_encryption_select = 1;
        psa_write(dev, (char *) &psa.psa_encryption_select - (char *) &psa,
                (unsigned char *) &psa.psa_encryption_select, 8+1);

        mmc_out(base, mmwoff(0, mmw_encr_enable),
              MMW_ENCR_ENABLE_EN | MMW_ENCR_ENABLE_MODE);
        mmc_write(base, mmwoff(0, mmw_encr_key),
                (unsigned char *) &psa.psa_encryption_key, 8);
      }

      if(wrq->u.encoding.flags & IW_ENCODE_DISABLED)
      {     /* disable encryption */
        psa.psa_encryption_select = 0;
        psa_write(dev, (char *) &psa.psa_encryption_select - (char *) &psa,
                (unsigned char *) &psa.psa_encryption_select, 1);

        mmc_out(base, mmwoff(0, mmw_encr_enable), 0);
      }
      /* update the Wavelan checksum */
      update_psa_checksum(dev);
      break;

    case SIOCGIWENCODE:
      /* Read the encryption key */
      if(!mmc_encr(base))
      {
        ret = -EOPNOTSUPP;
        break;
      }

      /* only super-user can see encryption key */
      if(!capable(CAP_NET_ADMIN))
      {
        ret = -EPERM;
        break;
      }

      /* Basic checking... */
      if(wrq->u.encoding.pointer != (caddr_t) 0)
      {
        psa_read(dev, (char *) &psa.psa_encryption_select - (char *) &psa,
               (unsigned char *) &psa.psa_encryption_select, 1+8);

        /* encryption is enabled ? */
        if(psa.psa_encryption_select)
          wrq->u.encoding.flags = IW_ENCODE_ENABLED;
        else
          wrq->u.encoding.flags = IW_ENCODE_DISABLED;
        wrq->u.encoding.flags |= mmc_encr(base);

        /* Copy the key to the user buffer */
        wrq->u.encoding.length = 8;
        if(copy_to_user(wrq->u.encoding.pointer, psa.psa_encryption_key, 8))
          ret = -EFAULT;
      }
      break;
#endif      /* WIRELESS_EXT > 8 */

#ifdef WAVELAN_ROAMING_EXT
#if WIRELESS_EXT > 5
    case SIOCSIWESSID:
      /* Check if disable */
      if(wrq->u.data.flags == 0)
      lp->filter_domains = 0;
      else
      /* Basic checking... */
      if(wrq->u.data.pointer != (caddr_t) 0)
        {
          char    essid[IW_ESSID_MAX_SIZE + 1];
          char *  endp;

          /* Check the size of the string */
          if(wrq->u.data.length > IW_ESSID_MAX_SIZE + 1)
            {
            ret = -E2BIG;
            break;
            }

          /* Copy the string in the driver */
          if(copy_from_user(essid, wrq->u.data.pointer, wrq->u.data.length))
            {
            ret = -EFAULT;
            break;
            }
          essid[IW_ESSID_MAX_SIZE] = '\0';

#ifdef DEBUG_IOCTL_INFO
          printk(KERN_DEBUG "SetEssid : ``%s''\n", essid);
#endif      /* DEBUG_IOCTL_INFO */

          /* Convert to a number (note : Wavelan specific) */
          lp->domain_id = simple_strtoul(essid, &endp, 16);
          /* Has it worked  ? */
          if(endp > essid)
            lp->filter_domains = 1;
          else
            {
            lp->filter_domains = 0;
            ret = -EINVAL;
            }
        }
      break;

    case SIOCGIWESSID:
      /* Basic checking... */
      if(wrq->u.data.pointer != (caddr_t) 0)
      {
        char            essid[IW_ESSID_MAX_SIZE + 1];

        /* Is the domain ID active ? */
        wrq->u.data.flags = lp->filter_domains;

        /* Copy Domain ID into a string (Wavelan specific) */
        /* Sound crazy, be we can't have a snprintf in the kernel !!! */
        sprintf(essid, "%lX", lp->domain_id);
        essid[IW_ESSID_MAX_SIZE] = '\0';

        /* Set the length */
        wrq->u.data.length = strlen(essid) + 1;

        /* Copy structure to the user buffer */
        if(copy_to_user(wrq->u.data.pointer, essid, wrq->u.data.length))
          ret = -EFAULT;
      }
      break;

    case SIOCSIWAP:
#ifdef DEBUG_IOCTL_INFO
      printk(KERN_DEBUG "Set AP to : %02X:%02X:%02X:%02X:%02X:%02X\n",
           wrq->u.ap_addr.sa_data[0],
           wrq->u.ap_addr.sa_data[1],
           wrq->u.ap_addr.sa_data[2],
           wrq->u.ap_addr.sa_data[3],
           wrq->u.ap_addr.sa_data[4],
           wrq->u.ap_addr.sa_data[5]);
#endif      /* DEBUG_IOCTL_INFO */

      ret = -EOPNOTSUPP;      /* Not supported yet */
      break;

    case SIOCGIWAP:
      /* Should get the real McCoy instead of own Ethernet address */
      memcpy(wrq->u.ap_addr.sa_data, dev->dev_addr, WAVELAN_ADDR_SIZE);
      wrq->u.ap_addr.sa_family = ARPHRD_ETHER;

      ret = -EOPNOTSUPP;      /* Not supported yet */
      break;
#endif      /* WIRELESS_EXT > 5 */
#endif      /* WAVELAN_ROAMING_EXT */

#if WIRELESS_EXT > 8
#ifdef WAVELAN_ROAMING
    case SIOCSIWMODE:
      switch(wrq->u.mode)
      {
      case IW_MODE_ADHOC:
        if(do_roaming)
          {
            wv_roam_cleanup(dev);
            do_roaming = 0;
          }
        break;
      case IW_MODE_INFRA:
        if(!do_roaming)
          {
            wv_roam_init(dev);
            do_roaming = 1;
          }
        break;
      default:
        ret = -EINVAL;
      }
      break;

    case SIOCGIWMODE:
      if(do_roaming)
      wrq->u.mode = IW_MODE_INFRA;
      else
      wrq->u.mode = IW_MODE_ADHOC;
      break;
#endif      /* WAVELAN_ROAMING */
#endif /* WIRELESS_EXT > 8 */

    case SIOCGIWRANGE:
      /* Basic checking... */
      if(wrq->u.data.pointer != (caddr_t) 0)
      {
        struct iw_range range;

         /* Set the length (very important for backward compatibility) */
         wrq->u.data.length = sizeof(struct iw_range);

         /* Set all the info we don't care or don't know about to zero */
         memset(&range, 0, sizeof(range));

#if WIRELESS_EXT > 10
         /* Set the Wireless Extension versions */
         range.we_version_compiled = WIRELESS_EXT;
         range.we_version_source = 9;     /* Nothing for us in v10 and v11 */
#endif /* WIRELESS_EXT > 10 */

        /* Set information in the range struct */
        range.throughput = 1.4 * 1000 * 1000;   /* don't argue on this ! */
        range.min_nwid = 0x0000;
        range.max_nwid = 0xFFFF;

        /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable) */
        if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
             (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
          {
            range.num_channels = 10;
            range.num_frequency = wv_frequency_list(base, range.freq,
                                          IW_MAX_FREQUENCIES);
          }
        else
          range.num_channels = range.num_frequency = 0;

        range.sensitivity = 0x3F;
        range.max_qual.qual = MMR_SGNL_QUAL;
        range.max_qual.level = MMR_SIGNAL_LVL;
        range.max_qual.noise = MMR_SILENCE_LVL;
#if WIRELESS_EXT > 11
        range.avg_qual.qual = MMR_SGNL_QUAL; /* Always max */
        /* Need to get better values for those two */
        range.avg_qual.level = 30;
        range.avg_qual.noise = 8;
#endif /* WIRELESS_EXT > 11 */

#if WIRELESS_EXT > 7
        range.num_bitrates = 1;
        range.bitrate[0] = 2000000; /* 2 Mb/s */
#endif /* WIRELESS_EXT > 7 */

#if WIRELESS_EXT > 8
        /* Encryption supported ? */
        if(mmc_encr(base))
          {
            range.encoding_size[0] = 8;   /* DES = 64 bits key */
            range.num_encoding_sizes = 1;
            range.max_encoding_tokens = 1;      /* Only one key possible */
          }
        else
          {
            range.num_encoding_sizes = 0;
            range.max_encoding_tokens = 0;
          }
#endif /* WIRELESS_EXT > 8 */

        /* Copy structure to the user buffer */
        if(copy_to_user(wrq->u.data.pointer, &range,
                    sizeof(struct iw_range)))
          ret = -EFAULT;
      }
      break;

    case SIOCGIWPRIV:
      /* Basic checking... */
      if(wrq->u.data.pointer != (caddr_t) 0)
      {
        struct iw_priv_args   priv[] =
        {   /* cmd,           set_args,   get_args,   name */
          { SIOCSIPQTHR, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, 0, "setqualthr" },
          { SIOCGIPQTHR, 0, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, "getqualthr" },
          { SIOCSIPHISTO, IW_PRIV_TYPE_BYTE | 16,     0, "sethisto" },
          { SIOCGIPHISTO, 0,      IW_PRIV_TYPE_INT | 16, "gethisto" },
          { SIOCSIPROAM, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1 , 0, "setroam" },
          { SIOCGIPROAM, 0, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, "getroam" },
        };

        /* Set the number of ioctl available */
        wrq->u.data.length = 6;

        /* Copy structure to the user buffer */
        if(copy_to_user(wrq->u.data.pointer, (u_char *) priv,
                   sizeof(priv)))
          ret = -EFAULT;
      }
      break;

#ifdef WIRELESS_SPY
    case SIOCSIWSPY:
      /* Set the spy list */

      /* Check the number of addresses */
      if(wrq->u.data.length > IW_MAX_SPY)
      {
        ret = -E2BIG;
        break;
      }
      lp->spy_number = wrq->u.data.length;

      /* If there is some addresses to copy */
      if(lp->spy_number > 0)
      {
        struct sockaddr address[IW_MAX_SPY];
        int             i;

        /* Copy addresses to the driver */
        if(copy_from_user(address, wrq->u.data.pointer,
                      sizeof(struct sockaddr) * lp->spy_number))
          {
            ret = -EFAULT;
            break;
          }

        /* Copy addresses to the lp structure */
        for(i = 0; i < lp->spy_number; i++)
          {
            memcpy(lp->spy_address[i], address[i].sa_data,
                 WAVELAN_ADDR_SIZE);
          }

        /* Reset structure... */
        memset(lp->spy_stat, 0x00, sizeof(iw_qual) * IW_MAX_SPY);

#ifdef DEBUG_IOCTL_INFO
        printk(KERN_DEBUG "SetSpy - Set of new addresses is :\n");
        for(i = 0; i < wrq->u.data.length; i++)
          printk(KERN_DEBUG "%02X:%02X:%02X:%02X:%02X:%02X\n",
               lp->spy_address[i][0],
               lp->spy_address[i][1],
               lp->spy_address[i][2],
               lp->spy_address[i][3],
               lp->spy_address[i][4],
               lp->spy_address[i][5]);
#endif      /* DEBUG_IOCTL_INFO */
      }

      break;

    case SIOCGIWSPY:
      /* Get the spy list and spy stats */

      /* Set the number of addresses */
      wrq->u.data.length = lp->spy_number;

      /* If the user want to have the addresses back... */
      if((lp->spy_number > 0) && (wrq->u.data.pointer != (caddr_t) 0))
      {
        struct sockaddr address[IW_MAX_SPY];
        int             i;

        /* Copy addresses from the lp structure */
        for(i = 0; i < lp->spy_number; i++)
          {
            memcpy(address[i].sa_data, lp->spy_address[i],
                 WAVELAN_ADDR_SIZE);
            address[i].sa_family = ARPHRD_ETHER;
          }

        /* Copy addresses to the user buffer */
        if(copy_to_user(wrq->u.data.pointer, address,
                   sizeof(struct sockaddr) * lp->spy_number))
          {
            ret = -EFAULT;
            break;
          }

        /* Copy stats to the user buffer (just after) */
        if(copy_to_user(wrq->u.data.pointer +
                   (sizeof(struct sockaddr) * lp->spy_number),
                   lp->spy_stat, sizeof(iw_qual) * lp->spy_number))
          {
            ret = -EFAULT;
            break;
          }

        /* Reset updated flags */
        for(i = 0; i < lp->spy_number; i++)
          lp->spy_stat[i].updated = 0x0;
      }     /* if(pointer != NULL) */

      break;
#endif      /* WIRELESS_SPY */

      /* ------------------ PRIVATE IOCTL ------------------ */

    case SIOCSIPQTHR:
      if(!capable(CAP_NET_ADMIN))
      {
        ret = -EPERM;
        break;
      }
      psa.psa_quality_thr = *(wrq->u.name) & 0x0F;
      psa_write(dev, (char *)&psa.psa_quality_thr - (char *)&psa,
             (unsigned char *)&psa.psa_quality_thr, 1);
      /* update the Wavelan checksum */
      update_psa_checksum(dev);
      mmc_out(base, mmwoff(0, mmw_quality_thr), psa.psa_quality_thr);
      break;

    case SIOCGIPQTHR:
      psa_read(dev, (char *)&psa.psa_quality_thr - (char *)&psa,
             (unsigned char *)&psa.psa_quality_thr, 1);
      *(wrq->u.name) = psa.psa_quality_thr & 0x0F;
      break;

#ifdef WAVELAN_ROAMING
    case SIOCSIPROAM:
      /* Note : should check if user == root */
      if(do_roaming && (*wrq->u.name)==0)
      wv_roam_cleanup(dev);
      else if(do_roaming==0 && (*wrq->u.name)!=0)
      wv_roam_init(dev);

      do_roaming = (*wrq->u.name);
        
      break;

    case SIOCGIPROAM:
      *(wrq->u.name) = do_roaming;
      break;
#endif      /* WAVELAN_ROAMING */

#ifdef HISTOGRAM
    case SIOCSIPHISTO:
      /* Verif if the user is root */
      if(!capable(CAP_NET_ADMIN))
      {
        ret = -EPERM;
      }

      /* Check the number of intervals */
      if(wrq->u.data.length > 16)
      {
        ret = -E2BIG;
        break;
      }
      lp->his_number = wrq->u.data.length;

      /* If there is some addresses to copy */
      if(lp->his_number > 0)
      {
        /* Copy interval ranges to the driver */
        if(copy_from_user(lp->his_range, wrq->u.data.pointer,
                   sizeof(char) * lp->his_number))
          {
            ret = -EFAULT;
            break;
          }

        /* Reset structure... */
        memset(lp->his_sum, 0x00, sizeof(long) * 16);
      }
      break;

    case SIOCGIPHISTO:
      /* Set the number of intervals */
      wrq->u.data.length = lp->his_number;

      /* Give back the distribution statistics */
      if((lp->his_number > 0) && (wrq->u.data.pointer != (caddr_t) 0))
      {
        /* Copy data to the user buffer */
        if(copy_to_user(wrq->u.data.pointer, lp->his_sum,
                   sizeof(long) * lp->his_number))
          ret = -EFAULT;

      }     /* if(pointer != NULL) */
      break;
#endif      /* HISTOGRAM */

      /* ------------------- OTHER IOCTL ------------------- */

    default:
      ret = -EOPNOTSUPP;
    }

  /* ReEnable interrupts & restore flags */
  wv_splx(lp, &flags);

#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_ioctl()\n", dev->name);
#endif
  return ret;
}

/*------------------------------------------------------------------*/
/*
 * Get wireless statistics
 * Called by /proc/net/wireless...
 */
static iw_stats *
wavelan_get_wireless_stats(device * dev)
{
  ioaddr_t        base = dev->base_addr;
  net_local *           lp = (net_local *) dev->priv;
  mmr_t                 m;
  iw_stats *            wstats;
  unsigned long         flags;

#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_get_wireless_stats()\n", dev->name);
#endif

  /* Disable interrupts & save flags */
  wv_splhi(lp, &flags);

  wstats = &lp->wstats;

  /* Get data from the mmc */
  mmc_out(base, mmwoff(0, mmw_freeze), 1);

  mmc_read(base, mmroff(0, mmr_dce_status), &m.mmr_dce_status, 1);
  mmc_read(base, mmroff(0, mmr_wrong_nwid_l), &m.mmr_wrong_nwid_l, 2);
  mmc_read(base, mmroff(0, mmr_thr_pre_set), &m.mmr_thr_pre_set, 4);

  mmc_out(base, mmwoff(0, mmw_freeze), 0);

  /* Copy data to wireless stuff */
  wstats->status = m.mmr_dce_status & MMR_DCE_STATUS;
  wstats->qual.qual = m.mmr_sgnl_qual & MMR_SGNL_QUAL;
  wstats->qual.level = m.mmr_signal_lvl & MMR_SIGNAL_LVL;
  wstats->qual.noise = m.mmr_silence_lvl & MMR_SILENCE_LVL;
  wstats->qual.updated = (((m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) >> 7) |
                    ((m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) >> 6) |
                    ((m.mmr_silence_lvl & MMR_SILENCE_LVL_VALID) >> 5));
  wstats->discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l;
  wstats->discard.code = 0L;
  wstats->discard.misc = 0L;

  /* ReEnable interrupts & restore flags */
  wv_splx(lp, &flags);

#ifdef DEBUG_IOCTL_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_get_wireless_stats()\n", dev->name);
#endif
  return &lp->wstats;
}
#endif      /* WIRELESS_EXT */

/************************* PACKET RECEPTION *************************/
/*
 * This part deal with receiving the packets.
 * The interrupt handler get an interrupt when a packet has been
 * successfully received and called this part...
 */

/*------------------------------------------------------------------*/
/*
 * Calculate the starting address of the frame pointed to by the receive
 * frame pointer and verify that the frame seem correct
 * (called by wv_packet_rcv())
 */
static inline int
wv_start_of_frame(device *    dev,
              int       rfp,  /* end of frame */
              int       wrap) /* start of buffer */
{
  ioaddr_t  base = dev->base_addr;
  int       rp;
  int       len;

  rp = (rfp - 5 + RX_SIZE) % RX_SIZE;
  outb(rp & 0xff, PIORL(base));
  outb(((rp >> 8) & PIORH_MASK), PIORH(base));
  len = inb(PIOP(base));
  len |= inb(PIOP(base)) << 8;

  /* Sanity checks on size */
  /* Frame too big */
  if(len > MAXDATAZ + 100)
    {
#ifdef DEBUG_RX_ERROR
      printk(KERN_INFO "%s: wv_start_of_frame: Received frame too large, rfp %d len 0x%x\n",
           dev->name, rfp, len);
#endif
      return(-1);
    }
  
  /* Frame too short */
  if(len < 7)
    {
#ifdef DEBUG_RX_ERROR
      printk(KERN_INFO "%s: wv_start_of_frame: Received null frame, rfp %d len 0x%x\n",
           dev->name, rfp, len);
#endif
      return(-1);
    }
  
  /* Wrap around buffer */
  if(len > ((wrap - (rfp - len) + RX_SIZE) % RX_SIZE))      /* magic formula ! */
    {
#ifdef DEBUG_RX_ERROR
      printk(KERN_INFO "%s: wv_start_of_frame: wrap around buffer, wrap %d rfp %d len 0x%x\n",
           dev->name, wrap, rfp, len);
#endif
      return(-1);
    }

  return((rp - len + RX_SIZE) % RX_SIZE);
} /* wv_start_of_frame */

/*------------------------------------------------------------------*/
/*
 * This routine does the actual copy of data (including the ethernet
 * header structure) from the WaveLAN card to an sk_buff chain that
 * will be passed up to the network interface layer. NOTE: We
 * currently don't handle trailer protocols (neither does the rest of
 * the network interface), so if that is needed, it will (at least in
 * part) be added here.  The contents of the receive ring buffer are
 * copied to a message chain that is then passed to the kernel.
 *
 * Note: if any errors occur, the packet is "dropped on the floor"
 * (called by wv_packet_rcv())
 */
static inline void
wv_packet_read(device *       dev,
             int        fd_p,
             int        sksize)
{
  net_local *           lp = (net_local *) dev->priv;
  struct sk_buff *      skb;

#ifdef DEBUG_RX_TRACE
  printk(KERN_DEBUG "%s: ->wv_packet_read(0x%X, %d)\n",
       dev->name, fd_p, sksize);
#endif

  /* Allocate some buffer for the new packet */
  if((skb = dev_alloc_skb(sksize+2)) == (struct sk_buff *) NULL)
    {
#ifdef DEBUG_RX_ERROR
      printk(KERN_INFO "%s: wv_packet_read(): could not alloc_skb(%d, GFP_ATOMIC)\n",
           dev->name, sksize);
#endif
      lp->stats.rx_dropped++;
      /*
       * Not only do we want to return here, but we also need to drop the
       * packet on the floor to clear the interrupt.
       */
      return;
    }

  skb->dev = dev;

  skb_reserve(skb, 2);
  fd_p = read_ringbuf(dev, fd_p, (char *) skb_put(skb, sksize), sksize);
  skb->protocol = eth_type_trans(skb, dev);

#ifdef DEBUG_RX_INFO
  wv_packet_info(skb->mac.raw, sksize, dev->name, "wv_packet_read");
#endif      /* DEBUG_RX_INFO */
     
  /* Statistics gathering & stuff associated.
   * It seem a bit messy with all the define, but it's really simple... */
  if(
#ifdef WIRELESS_SPY
     (lp->spy_number > 0) ||
#endif      /* WIRELESS_SPY */
#ifdef HISTOGRAM
     (lp->his_number > 0) ||
#endif      /* HISTOGRAM */
#ifdef WAVELAN_ROAMING
     (do_roaming) ||
#endif      /* WAVELAN_ROAMING */
     0)
    {
      u_char      stats[3];   /* Signal level, Noise level, Signal quality */

      /* read signal level, silence level and signal quality bytes */
      fd_p = read_ringbuf(dev, (fd_p + 4) % RX_SIZE + RX_BASE,
                    stats, 3);
#ifdef DEBUG_RX_INFO
      printk(KERN_DEBUG "%s: wv_packet_read(): Signal level %d/63, Silence level %d/63, signal quality %d/16\n",
           dev->name, stats[0] & 0x3F, stats[1] & 0x3F, stats[2] & 0x0F);
#endif

#ifdef WAVELAN_ROAMING
      if(do_roaming)
      if(WAVELAN_BEACON(skb->data))
        wl_roam_gather(dev, skb->data, stats);
#endif      /* WAVELAN_ROAMING */
        
#ifdef WIRELESS_SPY
      wl_spy_gather(dev, skb->mac.raw + WAVELAN_ADDR_SIZE, stats);
#endif      /* WIRELESS_SPY */
#ifdef HISTOGRAM
      wl_his_gather(dev, stats);
#endif      /* HISTOGRAM */
    }

  /*
   * Hand the packet to the Network Module
   */
  netif_rx(skb);

  /* Keep stats up to date */
  dev->last_rx = jiffies;
  lp->stats.rx_packets++;
  add_rx_bytes(&lp->stats, sksize);

#ifdef DEBUG_RX_TRACE
  printk(KERN_DEBUG "%s: <-wv_packet_read()\n", dev->name);
#endif
  return;
}

/*------------------------------------------------------------------*/
/*
 * This routine is called by the interrupt handler to initiate a
 * packet transfer from the card to the network interface layer above
 * this driver.  This routine checks if a buffer has been successfully
 * received by the WaveLAN card.  If so, the routine wv_packet_read is
 * called to do the actual transfer of the card's data including the
 * ethernet header into a packet consisting of an sk_buff chain.
 * (called by wavelan_interrupt())
 * Note : the spinlock is already grabbed for us and irq are disabled.
 */
static inline void
wv_packet_rcv(device *  dev)
{
  ioaddr_t  base = dev->base_addr;
  net_local *     lp = (net_local *) dev->priv;
  int       newrfp;
  int       rp;
  int       len;
  int       f_start;
  int       status;
  int       i593_rfp;
  int       stat_ptr;
  u_char    c[4];

#ifdef DEBUG_RX_TRACE
  printk(KERN_DEBUG "%s: ->wv_packet_rcv()\n", dev->name);
#endif

  /* Get the new receive frame pointer from the i82593 chip */
  outb(CR0_STATUS_2 | OP0_NOP, LCCR(base));
  i593_rfp = inb(LCSR(base));
  i593_rfp |= inb(LCSR(base)) << 8;
  i593_rfp %= RX_SIZE;

  /* Get the new receive frame pointer from the WaveLAN card.
   * It is 3 bytes more than the increment of the i82593 receive
   * frame pointer, for each packet. This is because it includes the
   * 3 roaming bytes added by the mmc.
   */
  newrfp = inb(RPLL(base));
  newrfp |= inb(RPLH(base)) << 8;
  newrfp %= RX_SIZE;

#ifdef DEBUG_RX_INFO
  printk(KERN_DEBUG "%s: wv_packet_rcv(): i593_rfp %d stop %d newrfp %d lp->rfp %d\n",
       dev->name, i593_rfp, lp->stop, newrfp, lp->rfp);
#endif

#ifdef DEBUG_RX_ERROR
  /* If no new frame pointer... */
  if(lp->overrunning || newrfp == lp->rfp)
    printk(KERN_INFO "%s: wv_packet_rcv(): no new frame: i593_rfp %d stop %d newrfp %d lp->rfp %d\n",
         dev->name, i593_rfp, lp->stop, newrfp, lp->rfp);
#endif

  /* Read all frames (packets) received */
  while(newrfp != lp->rfp)
    {
      /* A frame is composed of the packet, followed by a status word,
       * the length of the frame (word) and the mmc info (SNR & qual).
       * It's because the length is at the end that we can only scan
       * frames backward. */

      /* Find the first frame by skipping backwards over the frames */
      rp = newrfp;      /* End of last frame */
      while(((f_start = wv_start_of_frame(dev, rp, newrfp)) != lp->rfp) &&
          (f_start != -1))
        rp = f_start;

      /* If we had a problem */
      if(f_start == -1)
      {
#ifdef DEBUG_RX_ERROR
        printk(KERN_INFO "wavelan_cs: cannot find start of frame ");
        printk(" i593_rfp %d stop %d newrfp %d lp->rfp %d\n",
             i593_rfp, lp->stop, newrfp, lp->rfp);
#endif
        lp->rfp = rp;         /* Get to the last usable frame */
        continue;
      }

      /* f_start point to the beggining of the first frame received
       * and rp to the beggining of the next one */

      /* Read status & length of the frame */
      stat_ptr = (rp - 7 + RX_SIZE) % RX_SIZE;
      stat_ptr = read_ringbuf(dev, stat_ptr, c, 4);
      status = c[0] | (c[1] << 8);
      len = c[2] | (c[3] << 8);

      /* Check status */
      if((status & RX_RCV_OK) != RX_RCV_OK)
      {
        lp->stats.rx_errors++;
        if(status & RX_NO_SFD)
          lp->stats.rx_frame_errors++;
        if(status & RX_CRC_ERR)
          lp->stats.rx_crc_errors++;
        if(status & RX_OVRRUN)
          lp->stats.rx_over_errors++;

#ifdef DEBUG_RX_FAIL
        printk(KERN_DEBUG "%s: wv_packet_rcv(): packet not received ok, status = 0x%x\n",
             dev->name, status);
#endif
      }
      else
      /* Read the packet and transmit to Linux */
      wv_packet_read(dev, f_start, len - 2);

      /* One frame has been processed, skip it */
      lp->rfp = rp;
    }

  /*
   * Update the frame stop register, but set it to less than
   * the full 8K to allow space for 3 bytes of signal strength
   * per packet.
   */
  lp->stop = (i593_rfp + RX_SIZE - ((RX_SIZE / 64) * 3)) % RX_SIZE;
  outb(OP0_SWIT_TO_PORT_1 | CR0_CHNL, LCCR(base));
  outb(CR1_STOP_REG_UPDATE | (lp->stop >> RX_SIZE_SHIFT), LCCR(base));
  outb(OP1_SWIT_TO_PORT_0, LCCR(base));

#ifdef DEBUG_RX_TRACE
  printk(KERN_DEBUG "%s: <-wv_packet_rcv()\n", dev->name);
#endif
}

/*********************** PACKET TRANSMISSION ***********************/
/*
 * This part deal with sending packet through the wavelan
 * We copy the packet to the send buffer and then issue the send
 * command to the i82593. The result of this operation will be
 * checked in wavelan_interrupt()
 */

/*------------------------------------------------------------------*/
/*
 * This routine fills in the appropriate registers and memory
 * locations on the WaveLAN card and starts the card off on
 * the transmit.
 * (called in wavelan_packet_xmit())
 */
static inline void
wv_packet_write(device *      dev,
            void *            buf,
            short       length)
{
  net_local *           lp = (net_local *) dev->priv;
  ioaddr_t        base = dev->base_addr;
  unsigned long         flags;
  int             clen = length;
  register u_short      xmtdata_base = TX_BASE;

#ifdef DEBUG_TX_TRACE
  printk(KERN_DEBUG "%s: ->wv_packet_write(%d)\n", dev->name, length);
#endif

  wv_splhi(lp, &flags);

  /* Check if we need some padding */
  if(clen < ETH_ZLEN)
    clen = ETH_ZLEN;

  /* Write the length of data buffer followed by the buffer */
  outb(xmtdata_base & 0xff, PIORL(base));
  outb(((xmtdata_base >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base));
  outb(clen & 0xff, PIOP(base));    /* lsb */
  outb(clen >> 8, PIOP(base));      /* msb */

  /* Send the data */
  outsb(PIOP(base), buf, clen);

  /* Indicate end of transmit chain */
  outb(OP0_NOP, PIOP(base));
  /* josullvn@cs.cmu.edu: need to send a second NOP for alignment... */
  outb(OP0_NOP, PIOP(base));

  /* Reset the transmit DMA pointer */
  hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET);
  hacr_write(base, HACR_DEFAULT);
  /* Send the transmit command */
  wv_82593_cmd(dev, "wv_packet_write(): transmit",
             OP0_TRANSMIT, SR0_NO_RESULT);

  /* Keep stats up to date */
  add_tx_bytes(&lp->stats, length);

#ifndef HAVE_NETIF_QUEUE
  /* If watchdog not already active, activate it... */
  mod_timer(&lp->watchdog, jiffies + WATCHDOG_JIFFIES);
#endif

  wv_splx(lp, &flags);

#ifdef DEBUG_TX_INFO
  wv_packet_info((u_char *) buf, length, dev->name, "wv_packet_write");
#endif      /* DEBUG_TX_INFO */

#ifdef DEBUG_TX_TRACE
  printk(KERN_DEBUG "%s: <-wv_packet_write()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * This routine is called when we want to send a packet (NET3 callback)
 * In this routine, we check if the harware is ready to accept
 * the packet. We also prevent reentrance. Then, we call the function
 * to send the packet...
 */
static int
wavelan_packet_xmit(struct sk_buff *      skb,
                device *            dev)
{
  net_local *           lp = (net_local *)dev->priv;
  unsigned long         flags;

#ifdef DEBUG_TX_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_packet_xmit(0x%X)\n", dev->name,
       (unsigned) skb);
#endif

  /* Check that skb is valid */
  skb_tx_check(dev, skb);
  
#if (LINUX_VERSION_CODE < VERSION(2,1,79))
  /*
   * For ethernet, fill in the header.
   */
  skb->arp = 1;
#endif

  /*
   * Block a timer-based transmit from overlapping a previous transmit.
   * In other words, prevent reentering this routine.
   */
  netif_stop_queue(dev);

  /* If somebody has asked to reconfigure the controller,
   * we can do it now */
  if(lp->reconfig_82593)
    {
      wv_splhi(lp, &flags);   /* Disable interrupts */
      wv_82593_config(dev);
      wv_splx(lp, &flags);    /* Re-enable interrupts */
      /* Note : the configure procedure was totally synchronous,
       * so the Tx buffer is now free */
    }

#ifdef DEBUG_TX_ERROR
      if (skb->next)
            printk(KERN_INFO "skb has next\n");
#endif

  wv_packet_write(dev, skb->data, skb->len);

  DEV_KFREE_SKB(skb);

#ifdef DEBUG_TX_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_packet_xmit()\n", dev->name);
#endif
  return(0);
}

/********************** HARDWARE CONFIGURATION **********************/
/*
 * This part do the real job of starting and configuring the hardware.
 */

/*------------------------------------------------------------------*/
/*
 * Routine to initialize the Modem Management Controller.
 * (called by wv_hw_config())
 */
static inline int
wv_mmc_init(device *    dev)
{
  ioaddr_t  base = dev->base_addr;
  psa_t           psa;
  mmw_t           m;
  int       configured;
  int       i;          /* Loop counter */

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_mmc_init()\n", dev->name);
#endif

  /* Read the parameter storage area */
  psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa));

  /*
   * Check the first three octets of the MAC addr for the manufacturer's code.
   * Note: If you get the error message below, you've got a
   * non-NCR/AT&T/Lucent PCMCIA cards, see wavelan_cs.h for detail on
   * how to configure your card...
   */
  for(i = 0; i < (sizeof(MAC_ADDRESSES) / sizeof(char) / 3); i++)
    if((psa.psa_univ_mac_addr[0] == MAC_ADDRESSES[i][0]) &&
       (psa.psa_univ_mac_addr[1] == MAC_ADDRESSES[i][1]) &&
       (psa.psa_univ_mac_addr[2] == MAC_ADDRESSES[i][2]))
      break;

  /* If we have not found it... */
  if(i == (sizeof(MAC_ADDRESSES) / sizeof(char) / 3))
    {
#ifdef DEBUG_CONFIG_ERRORS
      printk(KERN_WARNING "%s: wv_mmc_init(): Invalid MAC address: %02X:%02X:%02X:...\n",
           dev->name, psa.psa_univ_mac_addr[0],
           psa.psa_univ_mac_addr[1], psa.psa_univ_mac_addr[2]);
#endif
      return FALSE;
    }

  /* Get the MAC address */
  memcpy(&dev->dev_addr[0], &psa.psa_univ_mac_addr[0], WAVELAN_ADDR_SIZE);

#ifdef USE_PSA_CONFIG
  configured = psa.psa_conf_status & 1;
#else
  configured = 0;
#endif

  /* Is the PSA is not configured */
  if(!configured)
    {
      /* User will be able to configure NWID after (with iwconfig) */
      psa.psa_nwid[0] = 0;
      psa.psa_nwid[1] = 0;

      /* As NWID is not set : no NWID checking */
      psa.psa_nwid_select = 0;

      /* Disable encryption */
      psa.psa_encryption_select = 0;

      /* Set to standard values
       * 0x04 for AT,
       * 0x01 for MCA,
       * 0x04 for PCMCIA and 2.00 card (AT&T 407-024689/E document)
       */
      if (psa.psa_comp_number & 1)
      psa.psa_thr_pre_set = 0x01;
      else
      psa.psa_thr_pre_set = 0x04;
      psa.psa_quality_thr = 0x03;

      /* It is configured */
      psa.psa_conf_status |= 1;

#ifdef USE_PSA_CONFIG
      /* Write the psa */
      psa_write(dev, (char *)psa.psa_nwid - (char *)&psa,
            (unsigned char *)psa.psa_nwid, 4);
      psa_write(dev, (char *)&psa.psa_thr_pre_set - (char *)&psa,
            (unsigned char *)&psa.psa_thr_pre_set, 1);
      psa_write(dev, (char *)&psa.psa_quality_thr - (char *)&psa,
            (unsigned char *)&psa.psa_quality_thr, 1);
      psa_write(dev, (char *)&psa.psa_conf_status - (char *)&psa,
            (unsigned char *)&psa.psa_conf_status, 1);
      /* update the Wavelan checksum */
      update_psa_checksum(dev);
#endif      /* USE_PSA_CONFIG */
    }

  /* Zero the mmc structure */
  memset(&m, 0x00, sizeof(m));

  /* Copy PSA info to the mmc */
  m.mmw_netw_id_l = psa.psa_nwid[1];
  m.mmw_netw_id_h = psa.psa_nwid[0];
  
  if(psa.psa_nwid_select & 1)
    m.mmw_loopt_sel = 0x00;
  else
    m.mmw_loopt_sel = MMW_LOOPT_SEL_DIS_NWID;

  memcpy(&m.mmw_encr_key, &psa.psa_encryption_key, 
       sizeof(m.mmw_encr_key));

  if(psa.psa_encryption_select)
    m.mmw_encr_enable = MMW_ENCR_ENABLE_EN | MMW_ENCR_ENABLE_MODE;
  else
    m.mmw_encr_enable = 0;

  m.mmw_thr_pre_set = psa.psa_thr_pre_set & 0x3F;
  m.mmw_quality_thr = psa.psa_quality_thr & 0x0F;

  /*
   * Set default modem control parameters.
   * See NCR document 407-0024326 Rev. A.
   */
  m.mmw_jabber_enable = 0x01;
  m.mmw_anten_sel = MMW_ANTEN_SEL_ALG_EN;
  m.mmw_ifs = 0x20;
  m.mmw_mod_delay = 0x04;
  m.mmw_jam_time = 0x38;

  m.mmw_des_io_invert = 0;
  m.mmw_freeze = 0;
  m.mmw_decay_prm = 0;
  m.mmw_decay_updat_prm = 0;

  /* Write all info to mmc */
  mmc_write(base, 0, (u_char *)&m, sizeof(m));

  /* The following code start the modem of the 2.00 frequency
   * selectable cards at power on. It's not strictly needed for the
   * following boots...
   * The original patch was by Joe Finney for the PCMCIA driver, but
   * I've cleaned it a bit and add documentation.
   * Thanks to Loeke Brederveld from Lucent for the info.
   */

  /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable)
   * (does it work for everybody ? - especially old cards...) */
  /* Note : WFREQSEL verify that it is able to read from EEprom
   * a sensible frequency (address 0x00) + that MMR_FEE_STATUS_ID
   * is 0xA (Xilinx version) or 0xB (Ariadne version).
   * My test is more crude but do work... */
  if(!(mmc_in(base, mmroff(0, mmr_fee_status)) &
       (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
    {
      /* We must download the frequency parameters to the
       * synthetisers (from the EEprom - area 1)
       * Note : as the EEprom is auto decremented, we set the end
       * if the area... */
      m.mmw_fee_addr = 0x0F;
      m.mmw_fee_ctrl = MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD;
      mmc_write(base, (char *)&m.mmw_fee_ctrl - (char *)&m,
            (unsigned char *)&m.mmw_fee_ctrl, 2);

      /* Wait until the download is finished */
      fee_wait(base, 100, 100);

#ifdef DEBUG_CONFIG_INFO
      /* The frequency was in the last word downloaded... */
      mmc_read(base, (char *)&m.mmw_fee_data_l - (char *)&m,
             (unsigned char *)&m.mmw_fee_data_l, 2);

      /* Print some info for the user */
      printk(KERN_DEBUG "%s: Wavelan 2.00 recognised (frequency select) : Current frequency = %ld\n",
           dev->name,
           ((m.mmw_fee_data_h << 4) |
            (m.mmw_fee_data_l >> 4)) * 5 / 2 + 24000L);
#endif

      /* We must now download the power adjust value (gain) to
       * the synthetisers (from the EEprom - area 7 - DAC) */
      m.mmw_fee_addr = 0x61;
      m.mmw_fee_ctrl = MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD;
      mmc_write(base, (char *)&m.mmw_fee_ctrl - (char *)&m,
            (unsigned char *)&m.mmw_fee_ctrl, 2);

      /* Wait until the download is finished */
    } /* if 2.00 card */

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_mmc_init()\n", dev->name);
#endif
  return TRUE;
}

/*------------------------------------------------------------------*/
/*
 * Routine to gracefully turn off reception, and wait for any commands
 * to complete.
 * (called in wv_ru_start() and wavelan_close() and wavelan_event())
 */
static int
wv_ru_stop(device *     dev)
{
  ioaddr_t  base = dev->base_addr;
  net_local *     lp = (net_local *) dev->priv;
  unsigned long   flags;
  int       status;
  int       spin;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_ru_stop()\n", dev->name);
#endif

  wv_splhi(lp, &flags);

  /* First, send the LAN controller a stop receive command */
  wv_82593_cmd(dev, "wv_graceful_shutdown(): stop-rcv",
             OP0_STOP_RCV, SR0_NO_RESULT);

  /* Then, spin until the receive unit goes idle */
  spin = 300;
  do
    {
      udelay(10);
      outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
      status = inb(LCSR(base));
    }
  while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_IDLE) && (spin-- > 0));

  /* Now, spin until the chip finishes executing its current command */
  do
    {
      udelay(10);
      outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
      status = inb(LCSR(base));
    }
  while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0));

  wv_splx(lp, &flags);

  /* If there was a problem */
  if(spin <= 0)
    {
#ifdef DEBUG_CONFIG_ERROR
      printk(KERN_INFO "%s: wv_ru_stop(): The chip doesn't want to stop...\n",
           dev->name);
#endif
      return FALSE;
    }

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_ru_stop()\n", dev->name);
#endif
  return TRUE;
} /* wv_ru_stop */

/*------------------------------------------------------------------*/
/*
 * This routine starts the receive unit running.  First, it checks if
 * the card is actually ready. Then the card is instructed to receive
 * packets again.
 * (called in wv_hw_reset() & wavelan_open())
 */
static int
wv_ru_start(device *    dev)
{
  ioaddr_t  base = dev->base_addr;
  net_local *     lp = (net_local *) dev->priv;
  unsigned long   flags;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_ru_start()\n", dev->name);
#endif

  /*
   * We need to start from a quiescent state. To do so, we could check
   * if the card is already running, but instead we just try to shut
   * it down. First, we disable reception (in case it was already enabled).
   */
  if(!wv_ru_stop(dev))
    return FALSE;

  wv_splhi(lp, &flags);

  /* Now we know that no command is being executed. */

  /* Set the receive frame pointer and stop pointer */
  lp->rfp = 0;
  outb(OP0_SWIT_TO_PORT_1 | CR0_CHNL, LCCR(base));

  /* Reset ring management.  This sets the receive frame pointer to 1 */
  outb(OP1_RESET_RING_MNGMT, LCCR(base));

#if 0
  /* XXX the i82593 manual page 6-4 seems to indicate that the stop register
     should be set as below */
  /* outb(CR1_STOP_REG_UPDATE|((RX_SIZE - 0x40)>> RX_SIZE_SHIFT),LCCR(base));*/
#elif 0
  /* but I set it 0 instead */
  lp->stop = 0;
#else
  /* but I set it to 3 bytes per packet less than 8K */
  lp->stop = (0 + RX_SIZE - ((RX_SIZE / 64) * 3)) % RX_SIZE;
#endif
  outb(CR1_STOP_REG_UPDATE | (lp->stop >> RX_SIZE_SHIFT), LCCR(base));
  outb(OP1_INT_ENABLE, LCCR(base));
  outb(OP1_SWIT_TO_PORT_0, LCCR(base));

  /* Reset receive DMA pointer */
  hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET);
  hacr_write_slow(base, HACR_DEFAULT);

  /* Receive DMA on channel 1 */
  wv_82593_cmd(dev, "wv_ru_start(): rcv-enable",
             CR0_CHNL | OP0_RCV_ENABLE, SR0_NO_RESULT);

#ifdef DEBUG_I82593_SHOW
  {
    int     status;
    int     opri;
    int     spin = 10000;

    /* spin until the chip starts receiving */
    do
      {
      outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
      status = inb(LCSR(base));
      if(spin-- <= 0)
        break;
      }
    while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_ACTIVE) &&
        ((status & SR3_RCV_STATE_MASK) != SR3_RCV_READY));
    printk(KERN_DEBUG "rcv status is 0x%x [i:%d]\n",
         (status & SR3_RCV_STATE_MASK), i);
  }
#endif

  wv_splx(lp, &flags);

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_ru_start()\n", dev->name);
#endif
  return TRUE;
}

/*------------------------------------------------------------------*/
/*
 * This routine does a standard config of the WaveLAN controller (i82593).
 * In the ISA driver, this is integrated in wavelan_hardware_reset()
 * (called by wv_hw_config(), wv_82593_reconfig() & wavelan_packet_xmit())
 */
static int
wv_82593_config(device *      dev)
{
  ioaddr_t              base = dev->base_addr;
  net_local *                 lp = (net_local *) dev->priv;
  struct i82593_conf_block    cfblk;
  int                   ret = TRUE;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_82593_config()\n", dev->name);
#endif

  /* Create & fill i82593 config block
   *
   * Now conform to Wavelan document WCIN085B
   */
  memset(&cfblk, 0x00, sizeof(struct i82593_conf_block));
  cfblk.d6mod = FALSE;        /* Run in i82593 advanced mode */
  cfblk.fifo_limit = 5;         /* = 56 B rx and 40 B tx fifo thresholds */
  cfblk.forgnesi = FALSE;       /* 0=82C501, 1=AMD7992B compatibility */
  cfblk.fifo_32 = 1;
  cfblk.throttle_enb = FALSE;
  cfblk.contin = TRUE;          /* enable continuous mode */
  cfblk.cntrxint = FALSE;       /* enable continuous mode receive interrupts */
  cfblk.addr_len = WAVELAN_ADDR_SIZE;
  cfblk.acloc = TRUE;           /* Disable source addr insertion by i82593 */
  cfblk.preamb_len = 0;         /* 2 bytes preamble (SFD) */
  cfblk.loopback = FALSE;
  cfblk.lin_prio = 0;         /* conform to 802.3 backoff algoritm */
  cfblk.exp_prio = 5;           /* conform to 802.3 backoff algoritm */
  cfblk.bof_met = 1;            /* conform to 802.3 backoff algoritm */
  cfblk.ifrm_spc = 0x20;      /* 32 bit times interframe spacing */
  cfblk.slottim_low = 0x20;   /* 32 bit times slot time */
  cfblk.slottim_hi = 0x0;
  cfblk.max_retr = 15;
  cfblk.prmisc = ((lp->promiscuous) ? TRUE: FALSE);   /* Promiscuous mode */
  cfblk.bc_dis = FALSE;         /* Enable broadcast reception */
  cfblk.crs_1 = TRUE;         /* Transmit without carrier sense */
  cfblk.nocrc_ins = FALSE;    /* i82593 generates CRC */    
  cfblk.crc_1632 = FALSE;     /* 32-bit Autodin-II CRC */
  cfblk.crs_cdt = FALSE;      /* CD not to be interpreted as CS */
  cfblk.cs_filter = 0;        /* CS is recognized immediately */
  cfblk.crs_src = FALSE;      /* External carrier sense */
  cfblk.cd_filter = 0;        /* CD is recognized immediately */
  cfblk.min_fr_len = ETH_ZLEN >> 2;     /* Minimum frame length 64 bytes */
  cfblk.lng_typ = FALSE;      /* Length field > 1500 = type field */
  cfblk.lng_fld = TRUE;       /* Disable 802.3 length field check */
  cfblk.rxcrc_xf = TRUE;      /* Don't transfer CRC to memory */
  cfblk.artx = TRUE;          /* Disable automatic retransmission */
  cfblk.sarec = TRUE;         /* Disable source addr trig of CD */
  cfblk.tx_jabber = TRUE;     /* Disable jabber jam sequence */
  cfblk.hash_1 = FALSE;       /* Use bits 0-5 in mc address hash */
  cfblk.lbpkpol = TRUE;       /* Loopback pin active high */
  cfblk.fdx = FALSE;          /* Disable full duplex operation */
  cfblk.dummy_6 = 0x3f;       /* all ones */
  cfblk.mult_ia = FALSE;      /* No multiple individual addresses */
  cfblk.dis_bof = FALSE;      /* Disable the backoff algorithm ?! */
  cfblk.dummy_1 = TRUE;       /* set to 1 */
  cfblk.tx_ifs_retrig = 3;    /* Hmm... Disabled */
#ifdef MULTICAST_ALL
  cfblk.mc_all = (lp->allmulticast ? TRUE: FALSE);    /* Allow all multicasts */
#else
  cfblk.mc_all = FALSE;       /* No multicast all mode */
#endif
  cfblk.rcv_mon = 0;          /* Monitor mode disabled */
  cfblk.frag_acpt = TRUE;     /* Do not accept fragments */
  cfblk.tstrttrs = FALSE;     /* No start transmission threshold */
  cfblk.fretx = TRUE;         /* FIFO automatic retransmission */
  cfblk.syncrqs = FALSE;      /* Synchronous DRQ deassertion... */
  cfblk.sttlen = TRUE;        /* 6 byte status registers */
  cfblk.rx_eop = TRUE;        /* Signal EOP on packet reception */
  cfblk.tx_eop = TRUE;        /* Signal EOP on packet transmission */
  cfblk.rbuf_size = RX_SIZE>>11;    /* Set receive buffer size */
  cfblk.rcvstop = TRUE;       /* Enable Receive Stop Register */

#ifdef DEBUG_I82593_SHOW
  {
    u_char *c = (u_char *) &cfblk;
    int i;
    printk(KERN_DEBUG "wavelan_cs: config block:");
    for(i = 0; i < sizeof(struct i82593_conf_block); i++,c++)
      {
      if((i % 16) == 0) printk("\n" KERN_DEBUG);
      printk("%02x ", *c);
      }
    printk("\n");
  }
#endif

  /* Copy the config block to the i82593 */
  outb(TX_BASE & 0xff, PIORL(base));
  outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base));
  outb(sizeof(struct i82593_conf_block) & 0xff, PIOP(base));    /* lsb */
  outb(sizeof(struct i82593_conf_block) >> 8, PIOP(base));  /* msb */
  outsb(PIOP(base), (char *) &cfblk, sizeof(struct i82593_conf_block));

  /* reset transmit DMA pointer */
  hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET);
  hacr_write(base, HACR_DEFAULT);
  if(!wv_82593_cmd(dev, "wv_82593_config(): configure",
               OP0_CONFIGURE, SR0_CONFIGURE_DONE))
    ret = FALSE;

  /* Initialize adapter's ethernet MAC address */
  outb(TX_BASE & 0xff, PIORL(base));
  outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base));
  outb(WAVELAN_ADDR_SIZE, PIOP(base));    /* byte count lsb */
  outb(0, PIOP(base));              /* byte count msb */
  outsb(PIOP(base), &dev->dev_addr[0], WAVELAN_ADDR_SIZE);

  /* reset transmit DMA pointer */
  hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET);
  hacr_write(base, HACR_DEFAULT);
  if(!wv_82593_cmd(dev, "wv_82593_config(): ia-setup",
               OP0_IA_SETUP, SR0_IA_SETUP_DONE))
    ret = FALSE;

#ifdef WAVELAN_ROAMING
    /* If roaming is enabled, join the "Beacon Request" multicast group... */
    /* But only if it's not in there already! */
  if(do_roaming)
    dev_mc_add(dev,WAVELAN_BEACON_ADDRESS, WAVELAN_ADDR_SIZE, 1);
#endif      /* WAVELAN_ROAMING */

  /* If any multicast address to set */
  if(lp->mc_count)
    {
      struct dev_mc_list *    dmi;
      int               addrs_len = WAVELAN_ADDR_SIZE * lp->mc_count;

#ifdef DEBUG_CONFIG_INFO
      printk(KERN_DEBUG "%s: wv_hw_config(): set %d multicast addresses:\n",
           dev->name, lp->mc_count);
      for(dmi=dev->mc_list; dmi; dmi=dmi->next)
      printk(KERN_DEBUG " %02x:%02x:%02x:%02x:%02x:%02x\n",
             dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2],
             dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5] );
#endif

      /* Initialize adapter's ethernet multicast addresses */
      outb(TX_BASE & 0xff, PIORL(base));
      outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base));
      outb(addrs_len & 0xff, PIOP(base)); /* byte count lsb */
      outb((addrs_len >> 8), PIOP(base)); /* byte count msb */
      for(dmi=dev->mc_list; dmi; dmi=dmi->next)
      outsb(PIOP(base), dmi->dmi_addr, dmi->dmi_addrlen);

      /* reset transmit DMA pointer */
      hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET);
      hacr_write(base, HACR_DEFAULT);
      if(!wv_82593_cmd(dev, "wv_82593_config(): mc-setup",
                   OP0_MC_SETUP, SR0_MC_SETUP_DONE))
      ret = FALSE;
      lp->mc_count = dev->mc_count; /* remember to avoid repeated reset */
    }

  /* Job done, clear the flag */
  lp->reconfig_82593 = FALSE;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_82593_config()\n", dev->name);
#endif
  return(ret);
}

/*------------------------------------------------------------------*/
/*
 * Read the Access Configuration Register, perform a software reset,
 * and then re-enable the card's software.
 *
 * If I understand correctly : reset the pcmcia interface of the
 * wavelan.
 * (called by wv_config())
 */
static inline int
wv_pcmcia_reset(device *      dev)
{
  int       i;
  conf_reg_t      reg = { 0, CS_READ, CISREG_COR, 0 };
  dev_link_t *    link = ((net_local *) dev->priv)->link;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_pcmcia_reset()\n", dev->name);
#endif

  i = CardServices(AccessConfigurationRegister, link->handle, &reg);
  if(i != CS_SUCCESS)
    {
      cs_error(link->handle, AccessConfigurationRegister, i);
      return FALSE;
    }
      
#ifdef DEBUG_CONFIG_INFO
  printk(KERN_DEBUG "%s: wavelan_pcmcia_reset(): Config reg is 0x%x\n",
       dev->name, (u_int) reg.Value);
#endif

  reg.Action = CS_WRITE;
  reg.Value = reg.Value | COR_SW_RESET;
  i = CardServices(AccessConfigurationRegister, link->handle, &reg);
  if(i != CS_SUCCESS)
    {
      cs_error(link->handle, AccessConfigurationRegister, i);
      return FALSE;
    }
      
  reg.Action = CS_WRITE;
  reg.Value = COR_LEVEL_IRQ | COR_CONFIG;
  i = CardServices(AccessConfigurationRegister, link->handle, &reg);
  if(i != CS_SUCCESS)
    {
      cs_error(link->handle, AccessConfigurationRegister, i);
      return FALSE;
    }

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_pcmcia_reset()\n", dev->name);
#endif
  return TRUE;
}

/*------------------------------------------------------------------*/
/*
 * wavelan_hw_config() is called after a CARD_INSERTION event is
 * received, to configure the wavelan hardware.
 * Note that the reception will be enabled in wavelan->open(), so the
 * device is configured but idle...
 * Performs the following actions:
 *    1. A pcmcia software reset (using wv_pcmcia_reset())
 *    2. A power reset (reset DMA)
 *    3. Reset the LAN controller
 *    4. Initialize the radio modem (using wv_mmc_init)
 *    5. Configure LAN controller (using wv_82593_config)
 *    6. Perform a diagnostic on the LAN controller
 * (called by wavelan_event() & wv_hw_reset())
 */
static int
wv_hw_config(device *   dev)
{
  net_local *           lp = (net_local *) dev->priv;
  ioaddr_t        base = dev->base_addr;
  unsigned long         flags;
  int             ret = FALSE;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_hw_config()\n", dev->name);
#endif

#ifdef STRUCT_CHECK
  if(wv_structuct_check() != (char *) NULL)
    {
      printk(KERN_WARNING "%s: wv_hw_config: structure/compiler botch: \"%s\"\n",
           dev->name, wv_structuct_check());
      return FALSE;
    }
#endif      /* STRUCT_CHECK == 1 */

  /* Reset the pcmcia interface */
  if(wv_pcmcia_reset(dev) == FALSE)
    return FALSE;

  /* Disable interrupts */
  wv_splhi(lp, &flags);

  /* Disguised goto ;-) */
  do
    {
      /* Power UP the module + reset the modem + reset host adapter
       * (in fact, reset DMA channels) */
      hacr_write_slow(base, HACR_RESET);
      hacr_write(base, HACR_DEFAULT);

      /* Check if the module has been powered up... */
      if(hasr_read(base) & HASR_NO_CLK)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_WARNING "%s: wv_hw_config(): modem not connected or not a wavelan card\n",
             dev->name);
#endif
        break;
      }

      /* initialize the modem */
      if(wv_mmc_init(dev) == FALSE)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_WARNING "%s: wv_hw_config(): Can't configure the modem\n",
             dev->name);
#endif
        break;
      }

      /* reset the LAN controller (i82593) */
      outb(OP0_RESET, LCCR(base));
      mdelay(1);  /* A bit crude ! */

      /* Initialize the LAN controller */
      if(wv_82593_config(dev) == FALSE)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_INFO "%s: wv_hw_config(): i82593 init failed\n",
             dev->name);
#endif
        break;
      }

      /* Diagnostic */
      if(wv_diag(dev) == FALSE)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_INFO "%s: wv_hw_config(): i82593 diagnostic failed\n",
             dev->name);
#endif
        break;
      }

      /* 
       * insert code for loopback test here
       */

      /* The device is now configured */
      lp->configured = 1;
      ret = TRUE;
    }
  while(0);

  /* Re-enable interrupts */
  wv_splx(lp, &flags);

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_hw_config()\n", dev->name);
#endif
  return(ret);
}

/*------------------------------------------------------------------*/
/*
 * Totally reset the wavelan and restart it.
 * Performs the following actions:
 *    1. Call wv_hw_config()
 *    2. Start the LAN controller's receive unit
 * (called by wavelan_event(), wavelan_watchdog() and wavelan_open())
 */
static inline void
wv_hw_reset(device *    dev)
{
  net_local *     lp = (net_local *) dev->priv;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_hw_reset()\n", dev->name);
#endif

#ifndef HAVE_NETIF_QUEUE
  /* If watchdog was activated, kill it ! */
  del_timer(&lp->watchdog);
#endif

  lp->nresets++;
  lp->configured = 0;
  
  /* Call wv_hw_config() for most of the reset & init stuff */
  if(wv_hw_config(dev) == FALSE)
    return;

  /* start receive unit */
  wv_ru_start(dev);

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <-wv_hw_reset()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * wv_pcmcia_config() is called after a CARD_INSERTION event is
 * received, to configure the PCMCIA socket, and to make the ethernet
 * device available to the system.
 * (called by wavelan_event())
 */
static inline int
wv_pcmcia_config(dev_link_t * link)
{
  client_handle_t handle;
  tuple_t         tuple;
  cisparse_t            parse;
  struct net_device *   dev;
  int             i;
  u_char          buf[64];
  win_req_t       req;
  memreq_t        mem;

  handle = link->handle;
  dev = (device *) link->priv;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "->wv_pcmcia_config(0x%p)\n", link);
#endif

  /*
   * This reads the card's CONFIG tuple to find its configuration
   * registers.
   */
  do
    {
      tuple.Attributes = 0;
      tuple.DesiredTuple = CISTPL_CONFIG;
      i = CardServices(GetFirstTuple, handle, &tuple);
      if(i != CS_SUCCESS)
      break;
      tuple.TupleData = (cisdata_t *)buf;
      tuple.TupleDataMax = 64;
      tuple.TupleOffset = 0;
      i = CardServices(GetTupleData, handle, &tuple);
      if(i != CS_SUCCESS)
      break;
      i = CardServices(ParseTuple, handle, &tuple, &parse);
      if(i != CS_SUCCESS)
      break;
      link->conf.ConfigBase = parse.config.base;
      link->conf.Present = parse.config.rmask[0];
    }
  while(0);
  if(i != CS_SUCCESS)
    {
      cs_error(link->handle, ParseTuple, i);
      link->state &= ~DEV_CONFIG_PENDING;
      return FALSE;
    }
    
  /* Configure card */
  link->state |= DEV_CONFIG;
  do
    {
      i = CardServices(RequestIO, link->handle, &link->io);
      if(i != CS_SUCCESS)
      {
        cs_error(link->handle, RequestIO, i);
        break;
      }

      /*
       * Now allocate an interrupt line.  Note that this does not
       * actually assign a handler to the interrupt.
       */
      i = CardServices(RequestIRQ, link->handle, &link->irq);
      if(i != CS_SUCCESS)
      {
        cs_error(link->handle, RequestIRQ, i);
        break;
      }

      /*
       * This actually configures the PCMCIA socket -- setting up
       * the I/O windows and the interrupt mapping.
       */
      link->conf.ConfigIndex = 1;
      i = CardServices(RequestConfiguration, link->handle, &link->conf);
      if(i != CS_SUCCESS)
      {
        cs_error(link->handle, RequestConfiguration, i);
        break;
      }

      /*
       * Allocate a small memory window.  Note that the dev_link_t
       * structure provides space for one window handle -- if your
       * device needs several windows, you'll need to keep track of
       * the handles in your private data structure, link->priv.
       */
      req.Attributes = WIN_DATA_WIDTH_8|WIN_MEMORY_TYPE_AM|WIN_ENABLE;
      req.Base = req.Size = 0;
      req.AccessSpeed = mem_speed;
      link->win = (window_handle_t)link->handle;
      i = CardServices(RequestWindow, &link->win, &req);
      if(i != CS_SUCCESS)
      {
        cs_error(link->handle, RequestWindow, i);
        break;
      }

      dev->rmem_start = dev->mem_start =
        (u_long)ioremap(req.Base, req.Size);
      dev->rmem_end = dev->mem_end = dev->mem_start + req.Size;

      mem.CardOffset = 0; mem.Page = 0;
      i = CardServices(MapMemPage, link->win, &mem);
      if(i != CS_SUCCESS)
      {
        cs_error(link->handle, MapMemPage, i);
        break;
      }

      /* Feed device with this info... */
      dev->irq = link->irq.AssignedIRQ;
      dev->base_addr = link->io.BasePort1;
      netif_start_queue(dev);

#ifdef DEBUG_CONFIG_INFO
      printk(KERN_DEBUG "wv_pcmcia_config: MEMSTART 0x%x IRQ %d IOPORT 0x%x\n",
           (u_int) dev->mem_start, dev->irq, (u_int) dev->base_addr);
#endif

      i = register_netdev(dev);
      if(i != 0)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_INFO "wv_pcmcia_config(): register_netdev() failed\n");
#endif
        break;
      }
    }
  while(0);       /* Humm... Disguised goto !!! */

  link->state &= ~DEV_CONFIG_PENDING;
  /* If any step failed, release any partially configured state */
  if(i != 0)
    {
      wv_pcmcia_release((u_long) link);
      return FALSE;
    }

  copy_dev_name(((net_local *) dev->priv)->node, dev);
  link->dev = &((net_local *) dev->priv)->node;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "<-wv_pcmcia_config()\n");
#endif
  return TRUE;
}

/*------------------------------------------------------------------*/
/*
 * After a card is removed, wv_pcmcia_release() will unregister the net
 * device, and release the PCMCIA configuration.  If the device is
 * still open, this will be postponed until it is closed.
 */
static void
wv_pcmcia_release(u_long      arg)  /* Address of the interface struct */
{
  dev_link_t *    link = (dev_link_t *) arg;
  device *  dev = (device *) link->priv;

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: -> wv_pcmcia_release(0x%p)\n", dev->name, link);
#endif

  /* If the device is currently in use, we won't release until it is
   * actually closed. */
  if(link->open)
    {
#ifdef DEBUG_CONFIG_INFO
      printk(KERN_DEBUG "%s: wv_pcmcia_release: release postponed, device still open\n",
           dev->name);
#endif
      link->state |= DEV_STALE_CONFIG;
      return;
    }

  /* Don't bother checking to see if these succeed or not */
  iounmap((u_char *)dev->mem_start);
  CardServices(ReleaseWindow, link->win);
  CardServices(ReleaseConfiguration, link->handle);
  CardServices(ReleaseIO, link->handle, &link->io);
  CardServices(ReleaseIRQ, link->handle, &link->irq);

  link->state &= ~(DEV_CONFIG | DEV_STALE_CONFIG);

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: <- wv_pcmcia_release()\n", dev->name);
#endif
} /* wv_pcmcia_release */

/*------------------------------------------------------------------*/
/*
 * Sometimes, wavelan_detach can't be performed following a call from
 * cardmgr (device still open, pcmcia_release not done) and the device
 * is put in a STALE_LINK state and remains in memory.
 *
 * This function run through our current list of device and attempt
 * another time to remove them. We hope that since last time the
 * device has properly been closed.
 *
 * (called by wavelan_attach() & cleanup_module())
 */
static void
wv_flush_stale_links(void)
{
  dev_link_t *    link;       /* Current node in linked list */
  dev_link_t *    next;       /* Next node in linked list */

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "-> wv_flush_stale_links(0x%p)\n", dev_list);
#endif

  /* Go through the list */
  for (link = dev_list; link; link = next)
    {
      next = link->next;

      /* Check if in need of being removed */
      if((link->state & DEV_STALE_LINK) ||
       (! (link->state & DEV_PRESENT)))
      wavelan_detach(link);

    }

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "<- wv_flush_stale_links()\n");
#endif
}

/************************ INTERRUPT HANDLING ************************/

/*
 * This function is the interrupt handler for the WaveLAN card. This
 * routine will be called whenever: 
 *    1. A packet is received.
 *    2. A packet has successfully been transferred and the unit is
 *       ready to transmit another packet.
 *    3. A command has completed execution.
 */
static void
wavelan_interrupt(int         irq,
              void *    dev_id,
              struct pt_regs * regs)
{
  device *  dev;
  net_local *     lp;
  ioaddr_t  base;
  int       status0;
  u_int           tx_status;

  if((dev = (device *)dev_id) == (device *) NULL)
    {
#ifdef DEBUG_INTERRUPT_ERROR
      printk(KERN_WARNING "wavelan_interrupt(): irq %d for unknown device.\n",
           irq);
#endif
      return;
    }

#ifdef DEBUG_INTERRUPT_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_interrupt()\n", dev->name);
#endif

  lp = (net_local *) dev->priv;
  base = dev->base_addr;

#ifdef DEBUG_INTERRUPT_INFO
  /* Check state of our spinlock (it should be cleared) */
  if(spin_is_locked(&lp->spinlock))
    printk(KERN_DEBUG
         "%s: wavelan_interrupt(): spinlock is already locked !!!\n",
         dev->name);
#endif

  /* Prevent reentrancy. We need to do that because we may have
   * multiple interrupt handler running concurently.
   * It is safe because wv_splhi() disable interrupts before aquiring
   * the spinlock. */
  spin_lock(&lp->spinlock);

  /* Treat all pending interrupts */
  while(1)
    {
      /* ---------------- INTERRUPT CHECKING ---------------- */
      /*
       * Look for the interrupt and verify the validity
       */
      outb(CR0_STATUS_0 | OP0_NOP, LCCR(base));
      status0 = inb(LCSR(base));

#ifdef DEBUG_INTERRUPT_INFO
      printk(KERN_DEBUG "status0 0x%x [%s => 0x%x]", status0, 
           (status0&SR0_INTERRUPT)?"int":"no int",status0&~SR0_INTERRUPT);
      if(status0&SR0_INTERRUPT)
      {
        printk(" [%s => %d]\n", (status0 & SR0_CHNL) ? "chnl" :
             ((status0 & SR0_EXECUTION) ? "cmd" :
              ((status0 & SR0_RECEPTION) ? "recv" : "unknown")),
             (status0 & SR0_EVENT_MASK));
      }
      else
      printk("\n");
#endif

      /* Return if no actual interrupt from i82593 (normal exit) */
      if(!(status0 & SR0_INTERRUPT))
      break;

      /* If interrupt is both Rx and Tx or none...
       * This code in fact is there to catch the spurious interrupt
       * when you remove the wavelan pcmcia card from the socket */
      if(((status0 & SR0_BOTH_RX_TX) == SR0_BOTH_RX_TX) ||
       ((status0 & SR0_BOTH_RX_TX) == 0x0))
      {
#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_INFO "%s: wv_interrupt(): bogus interrupt (or from dead card) : %X\n",
             dev->name, status0);
#endif
        /* Acknowledge the interrupt */
        outb(CR0_INT_ACK | OP0_NOP, LCCR(base));
        break;
      }

      /* ----------------- RECEIVING PACKET ----------------- */
      /*
       * When the wavelan signal the reception of a new packet,
       * we call wv_packet_rcv() to copy if from the buffer and
       * send it to NET3
       */
      if(status0 & SR0_RECEPTION)
      {
#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_DEBUG "%s: wv_interrupt(): receive\n", dev->name);
#endif

        if((status0 & SR0_EVENT_MASK) == SR0_STOP_REG_HIT)
          {
#ifdef DEBUG_INTERRUPT_ERROR
            printk(KERN_INFO "%s: wv_interrupt(): receive buffer overflow\n",
                 dev->name);
#endif
            lp->stats.rx_over_errors++;
            lp->overrunning = 1;
                }

        /* Get the packet */
        wv_packet_rcv(dev);
        lp->overrunning = 0;

        /* Acknowledge the interrupt */
        outb(CR0_INT_ACK | OP0_NOP, LCCR(base));
        continue;
      }

      /* ---------------- COMMAND COMPLETION ---------------- */
      /*
       * Interrupts issued when the i82593 has completed a command.
       * Most likely : transmission done
       */

      /* If a transmission has been done */
      if((status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_DONE ||
       (status0 & SR0_EVENT_MASK) == SR0_RETRANSMIT_DONE ||
       (status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_NO_CRC_DONE)
      {
#ifdef DEBUG_TX_ERROR
        if((status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_NO_CRC_DONE)
          printk(KERN_INFO "%s: wv_interrupt(): packet transmitted without CRC.\n",
               dev->name);
#endif

#ifndef HAVE_NETIF_QUEUE
        /* If watchdog was activated, kill it ! */
        del_timer(&lp->watchdog);
#endif

        /* Get transmission status */
        tx_status = inb(LCSR(base));
        tx_status |= (inb(LCSR(base)) << 8);
#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_DEBUG "%s: wv_interrupt(): transmission done\n",
             dev->name);
        {
          u_int   rcv_bytes;
          u_char  status3;
          rcv_bytes = inb(LCSR(base));
          rcv_bytes |= (inb(LCSR(base)) << 8);
          status3 = inb(LCSR(base));
          printk(KERN_DEBUG "tx_status 0x%02x rcv_bytes 0x%02x status3 0x%x\n",
               tx_status, rcv_bytes, (u_int) status3);
        }
#endif
        /* Check for possible errors */
        if((tx_status & TX_OK) != TX_OK)
          {
            lp->stats.tx_errors++;

            if(tx_status & TX_FRTL)
            {
#ifdef DEBUG_TX_ERROR
              printk(KERN_INFO "%s: wv_interrupt(): frame too long\n",
                   dev->name);
#endif
            }
            if(tx_status & TX_UND_RUN)
            {
#ifdef DEBUG_TX_FAIL
              printk(KERN_DEBUG "%s: wv_interrupt(): DMA underrun\n",
                   dev->name);
#endif
              lp->stats.tx_aborted_errors++;
            }
            if(tx_status & TX_LOST_CTS)
            {
#ifdef DEBUG_TX_FAIL
              printk(KERN_DEBUG "%s: wv_interrupt(): no CTS\n", dev->name);
#endif
              lp->stats.tx_carrier_errors++;
            }
            if(tx_status & TX_LOST_CRS)
            {
#ifdef DEBUG_TX_FAIL
              printk(KERN_DEBUG "%s: wv_interrupt(): no carrier\n",
                   dev->name);
#endif
              lp->stats.tx_carrier_errors++;
            }
            if(tx_status & TX_HRT_BEAT)
            {
#ifdef DEBUG_TX_FAIL
              printk(KERN_DEBUG "%s: wv_interrupt(): heart beat\n", dev->name);
#endif
              lp->stats.tx_heartbeat_errors++;
            }
            if(tx_status & TX_DEFER)
            {
#ifdef DEBUG_TX_FAIL
              printk(KERN_DEBUG "%s: wv_interrupt(): channel jammed\n",
                   dev->name);
#endif
            }
            /* Ignore late collisions since they're more likely to happen
             * here (the WaveLAN design prevents the LAN controller from
             * receiving while it is transmitting). We take action only when
             * the maximum retransmit attempts is exceeded.
             */
            if(tx_status & TX_COLL)
            {
              if(tx_status & TX_MAX_COL)
                {
#ifdef DEBUG_TX_FAIL
                  printk(KERN_DEBUG "%s: wv_interrupt(): channel congestion\n",
                       dev->name);
#endif
                  if(!(tx_status & TX_NCOL_MASK))
                  {
                    lp->stats.collisions += 0x10;
                  }
                }
            }
          } /* if(!(tx_status & TX_OK)) */

        lp->stats.collisions += (tx_status & TX_NCOL_MASK);
        lp->stats.tx_packets++;

        netif_wake_queue(dev);
        outb(CR0_INT_ACK | OP0_NOP, LCCR(base));      /* Acknowledge the interrupt */
      } 
      else  /* if interrupt = transmit done or retransmit done */
      {
#ifdef DEBUG_INTERRUPT_ERROR
        printk(KERN_INFO "wavelan_cs: unknown interrupt, status0 = %02x\n",
             status0);
#endif
        outb(CR0_INT_ACK | OP0_NOP, LCCR(base));      /* Acknowledge the interrupt */
      }
    } /* while(1) */

  spin_unlock(&lp->spinlock);

#ifdef DEBUG_INTERRUPT_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_interrupt()\n", dev->name);
#endif
} /* wv_interrupt */

/*------------------------------------------------------------------*/
/*
 * Watchdog: when we start a transmission, a timer is set for us in the
 * kernel.  If the transmission completes, this timer is disabled. If
 * the timer expires, we are called and we try to unlock the hardware.
 *
 * Note : This watchdog is move clever than the one in the ISA driver,
 * because it try to abort the current command before reseting
 * everything...
 * On the other hand, it's a bit simpler, because we don't have to
 * deal with the multiple Tx buffers...
 */
static void
#ifndef HAVE_NETIF_QUEUE
wavelan_watchdog(u_long       a)
{
  device *        dev = (device *) a;
#else
wavelan_watchdog(device *     dev)
{
#endif
  net_local *           lp = (net_local *) dev->priv;
  ioaddr_t        base = dev->base_addr;
  unsigned long         flags;
  int             aborted = FALSE;

#ifdef DEBUG_INTERRUPT_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_watchdog()\n", dev->name);
#endif

#ifdef DEBUG_INTERRUPT_ERROR
  printk(KERN_INFO "%s: wavelan_watchdog: watchdog timer expired\n",
       dev->name);
#endif

  wv_splhi(lp, &flags);

  /* Ask to abort the current command */
  outb(OP0_ABORT, LCCR(base));

  /* Wait for the end of the command (a bit hackish) */
  if(wv_82593_cmd(dev, "wavelan_watchdog(): abort",
              OP0_NOP | CR0_STATUS_3, SR0_EXECUTION_ABORTED))
    aborted = TRUE;

  /* Release spinlock here so that wv_hw_reset() can grab it */
  wv_splx(lp, &flags);

  /* Check if we were successful in aborting it */
  if(!aborted)
    {
      /* It seem that it wasn't enough */
#ifdef DEBUG_INTERRUPT_ERROR
      printk(KERN_INFO "%s: wavelan_watchdog: abort failed, trying reset\n",
           dev->name);
#endif
      wv_hw_reset(dev);
    }

#ifdef DEBUG_PSA_SHOW
  {
    psa_t         psa;
    psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa));
    wv_psa_show(&psa);
  }
#endif
#ifdef DEBUG_MMC_SHOW
  wv_mmc_show(dev);
#endif
#ifdef DEBUG_I82593_SHOW
  wv_ru_show(dev);
#endif

  /* We are no more waiting for something... */
  netif_wake_queue(dev);

#ifdef DEBUG_INTERRUPT_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_watchdog()\n", dev->name);
#endif
}

/********************* CONFIGURATION CALLBACKS *********************/
/*
 * Here are the functions called by the pcmcia package (cardmgr) and
 * linux networking (NET3) for initialization, configuration and
 * deinstallations of the Wavelan Pcmcia Hardware.
 */

/*------------------------------------------------------------------*/
/*
 * Configure and start up the WaveLAN PCMCIA adaptor.
 * Called by NET3 when it "open" the device.
 */
static int
wavelan_open(device *   dev)
{
  dev_link_t *    link = ((net_local *) dev->priv)->link;
  net_local *     lp = (net_local *)dev->priv;
  ioaddr_t  base = dev->base_addr;

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_open(dev=0x%x)\n", dev->name,
       (unsigned int) dev);
#endif

  /* Check if the modem is powered up (wavelan_close() power it down */
  if(hasr_read(base) & HASR_NO_CLK)
    {
      /* Power up (power up time is 250us) */
      hacr_write(base, HACR_DEFAULT);

      /* Check if the module has been powered up... */
      if(hasr_read(base) & HASR_NO_CLK)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_WARNING "%s: wavelan_open(): modem not connected\n",
             dev->name);
#endif
        return FALSE;
      }
    }

  /* Start reception and declare the driver ready */
  if(!lp->configured)
    return FALSE;
  if(!wv_ru_start(dev))
    wv_hw_reset(dev);         /* If problem : reset */
  netif_start_queue(dev);
  netif_mark_up(dev);

  /* Mark the device as used */
  link->open++;
  MOD_INC_USE_COUNT;

#ifdef WAVELAN_ROAMING
  if(do_roaming)
    wv_roam_init(dev);
#endif      /* WAVELAN_ROAMING */

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_open()\n", dev->name);
#endif
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Shutdown the WaveLAN PCMCIA adaptor.
 * Called by NET3 when it "close" the device.
 */
static int
wavelan_close(device *  dev)
{
  dev_link_t *    link = ((net_local *) dev->priv)->link;
  ioaddr_t  base = dev->base_addr;

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_close(dev=0x%x)\n", dev->name,
       (unsigned int) dev);
#endif

  /* If the device isn't open, then nothing to do */
  if(!link->open)
    {
#ifdef DEBUG_CONFIG_INFO
      printk(KERN_DEBUG "%s: wavelan_close(): device not open\n", dev->name);
#endif
      return 0;
    }

#ifdef WAVELAN_ROAMING
  /* Cleanup of roaming stuff... */
  if(do_roaming)
    wv_roam_cleanup(dev);
#endif      /* WAVELAN_ROAMING */

#ifndef HAVE_NETIF_QUEUE
  /* If watchdog was activated, kill it ! */
    del_timer(&((net_local *)dev->priv)->watchdog);
#endif

  link->open--;
  MOD_DEC_USE_COUNT;

  /* If the card is still present */
  if(netif_running(dev))
    {
      netif_stop_queue(dev);
      netif_mark_down(dev);

      /* Stop receiving new messages and wait end of transmission */
      wv_ru_stop(dev);

      /* Power down the module */
      hacr_write(base, HACR_DEFAULT & (~HACR_PWR_STAT));
    }
  else
    /* The card is no more there (flag is activated in wv_pcmcia_release) */
    if(link->state & DEV_STALE_CONFIG)
      wv_pcmcia_release((u_long)link);

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "%s: <-wavelan_close()\n", dev->name);
#endif
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * wavelan_attach() creates an "instance" of the driver, allocating
 * local data structures for one device (one interface).  The device
 * is registered with Card Services.
 *
 * The dev_link structure is initialized, but we don't actually
 * configure the card at this point -- we wait until we receive a
 * card insertion event.
 */
static dev_link_t *
wavelan_attach(void)
{
  client_reg_t    client_reg; /* Register with cardmgr */
  dev_link_t *    link;       /* Info for cardmgr */
  device *  dev;        /* Interface generic data */
  net_local *     lp;         /* Interface specific data */
  int       i, ret;

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "-> wavelan_attach()\n");
#endif

  /* Perform some cleanup */
  wv_flush_stale_links();

  /* Initialize the dev_link_t structure */
  link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
  if (!link) return NULL;
  memset(link, 0, sizeof(struct dev_link_t));

  /* Unused for the Wavelan */
  init_timer(&link->release);
  link->release.function = &wv_pcmcia_release;
  link->release.data = (u_long) link;

  /* The io structure describes IO port mapping */
  link->io.NumPorts1 = 8;
  link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
  link->io.IOAddrLines = 3;

  /* Interrupt setup */
  link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
  link->irq.IRQInfo1 = IRQ_INFO2_VALID | IRQ_LEVEL_ID;
  if (irq_list[0] == -1)
    link->irq.IRQInfo2 = irq_mask;
  else
    for (i = 0; i < 4; i++)
      link->irq.IRQInfo2 |= 1 << irq_list[i];
  link->irq.Handler = wavelan_interrupt;

  /* General socket configuration */
  link->conf.Attributes = CONF_ENABLE_IRQ;
  link->conf.Vcc = 50;
  link->conf.IntType = INT_MEMORY_AND_IO;

  /* Chain drivers */
  link->next = dev_list;
  dev_list = link;

  /* Allocate the generic data structure */
  dev = kmalloc(sizeof(struct net_device), GFP_KERNEL);
  if (!dev) {
      kfree(link);
      return NULL;
  }
  memset(dev, 0x00, sizeof(struct net_device));
  link->priv = link->irq.Instance = dev;

  /* Allocate the wavelan-specific data structure. */
  dev->priv = lp = (net_local *) kmalloc(sizeof(net_local), GFP_KERNEL);
  if (!lp) {
      kfree(link);
      kfree(dev);
      return NULL;
  }
  memset(lp, 0x00, sizeof(net_local));

  /* Init specific data */
  lp->configured = 0;
  lp->reconfig_82593 = FALSE;
  lp->nresets = 0;
  /* Multicast stuff */
  lp->promiscuous = 0;
  lp->allmulticast = 0;
  lp->mc_count = 0;

  /* Init spinlock */
  spin_lock_init(&lp->spinlock);

  /* back links */
  lp->link = link;
  lp->dev = dev;

  /* Standard setup for generic data */
  ether_setup(dev);

  /* wavelan NET3 callbacks */
  dev->open = &wavelan_open;
  dev->stop = &wavelan_close;
  dev->hard_start_xmit = &wavelan_packet_xmit;
  dev->get_stats = &wavelan_get_stats;
  dev->set_multicast_list = &wavelan_set_multicast_list;
#ifdef SET_MAC_ADDRESS
  dev->set_mac_address = &wavelan_set_mac_address;
#endif      /* SET_MAC_ADDRESS */

#ifdef HAVE_NETIF_QUEUE
  /* Set the watchdog timer */
  dev->tx_timeout = &wavelan_watchdog;
  dev->watchdog_timeo   = WATCHDOG_JIFFIES;
#else
  lp->watchdog.function = wavelan_watchdog;
  lp->watchdog.data = (unsigned long) dev;
#endif

#ifdef WIRELESS_EXT     /* If wireless extension exist in the kernel */
  dev->do_ioctl = wavelan_ioctl;    /* wireless extensions */
  dev->get_wireless_stats = wavelan_get_wireless_stats;
#endif

  /* Other specific data */
  /* Provide storage area for device name */
  init_dev_name(dev, ((net_local *)dev->priv)->node);
  dev->mtu = WAVELAN_MTU;

  /* Register with Card Services */
  client_reg.dev_info = &dev_info;
  client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
  client_reg.EventMask = 
    CS_EVENT_REGISTRATION_COMPLETE |
    CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
    CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
    CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
  client_reg.event_handler = &wavelan_event;
  client_reg.Version = 0x0210;
  client_reg.event_callback_args.client_data = link;

#ifdef DEBUG_CONFIG_INFO
  printk(KERN_DEBUG "wavelan_attach(): almost done, calling CardServices\n");
#endif

  ret = CardServices(RegisterClient, &link->handle, &client_reg);
  if(ret != 0)
    {
      cs_error(link->handle, RegisterClient, ret);
      wavelan_detach(link);
      return NULL;
    }

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "<- wavelan_attach()\n");
#endif

  return link;
}

/*------------------------------------------------------------------*/
/*
 * This deletes a driver "instance".  The device is de-registered with
 * Card Services.  If it has been released, all local data structures
 * are freed.  Otherwise, the structures will be freed when the device
 * is released.
 */
static void
wavelan_detach(dev_link_t *   link)
{
#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "-> wavelan_detach(0x%p)\n", link);
#endif

  /*
   * If the device is currently configured and active, we won't
   * actually delete it yet.  Instead, it is marked so that when the
   * release() function is called, that will trigger a proper
   * detach().
   */
  if(link->state & DEV_CONFIG)
    {
      /* Some others haven't done their job : give them another chance */
      wv_pcmcia_release((u_long) link);
      if(link->state & DEV_STALE_CONFIG)
      {
#ifdef DEBUG_CONFIG_INFO
        printk(KERN_DEBUG "wavelan_detach: detach postponed,"
             " '%s' still locked\n", link->dev->dev_name);
#endif
        link->state |= DEV_STALE_LINK;
        return;
      }
    }

  /* Break the link with Card Services */
  if(link->handle)
    CardServices(DeregisterClient, link->handle);
    
  /* Remove the interface data from the linked list */
  if(dev_list == link)
    dev_list = link->next;
  else
    {
      dev_link_t *      prev = dev_list;

      while((prev != (dev_link_t *) NULL) && (prev->next != link))
      prev = prev->next;

      if(prev == (dev_link_t *) NULL)
      {
#ifdef DEBUG_CONFIG_ERRORS
        printk(KERN_WARNING "wavelan_detach : Attempting to remove a nonexistent device.\n");
#endif
        return;
      }

      prev->next = link->next;
    }

  /* Free pieces */
  if(link->priv)
    {
      device *    dev = (device *) link->priv;

      /* Remove ourselves from the kernel list of ethernet devices */
      /* Warning : can't be called from interrupt, timer or wavelan_close() */
      if(link->dev != NULL)
      unregister_netdev(dev);
      link->dev = NULL;

      if(dev->priv)
      {
        /* Sound strange, but safe... */
        ((net_local *) dev->priv)->link = (dev_link_t *) NULL;
        ((net_local *) dev->priv)->dev = (device *) NULL;
        kfree(dev->priv);
      }
      kfree(link->priv);
    }
  kfree(link);

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "<- wavelan_detach()\n");
#endif
}

/*------------------------------------------------------------------*/
/*
 * The card status event handler. Mostly, this schedules other stuff
 * to run after an event is received. A CARD_REMOVAL event also sets
 * some flags to discourage the net drivers from trying to talk to the
 * card any more.
 */
static int
wavelan_event(event_t         event,            /* The event received */
            int         priority,
            event_callback_args_t * args)
{
  dev_link_t *    link = (dev_link_t *) args->client_data;
  device *  dev = (device *) link->priv;

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "->wavelan_event(): %s\n",
       ((event == CS_EVENT_REGISTRATION_COMPLETE)?"registration complete" :
        ((event == CS_EVENT_CARD_REMOVAL) ? "card removal" :
         ((event == CS_EVENT_CARD_INSERTION) ? "card insertion" :
          ((event == CS_EVENT_PM_SUSPEND) ? "pm suspend" :
           ((event == CS_EVENT_RESET_PHYSICAL) ? "physical reset" :
            ((event == CS_EVENT_PM_RESUME) ? "pm resume" :
             ((event == CS_EVENT_CARD_RESET) ? "card reset" :
            "unknown"))))))));
#endif

    switch(event)
      {
      case CS_EVENT_REGISTRATION_COMPLETE:
#ifdef DEBUG_CONFIG_INFO
      printk(KERN_DEBUG "wavelan_cs: registration complete\n");
#endif
      break;

      case CS_EVENT_CARD_REMOVAL:
      /* Oups ! The card is no more there */
      link->state &= ~DEV_PRESENT;
      if(link->state & DEV_CONFIG)
        {
          /* Accept no more transmissions */
          netif_device_detach(dev);

          /* Release the card */
          wv_pcmcia_release((u_long) link);
        }
      break;

      case CS_EVENT_CARD_INSERTION:
      /* Reset and configure the card */
      link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
      if(wv_pcmcia_config(link) &&
         wv_hw_config(dev))
        wv_init_info(dev);
      else
        dev->irq = 0;
      break;

      case CS_EVENT_PM_SUSPEND:
      /* NB: wavelan_close will be called, but too late, so we are
       * obliged to close nicely the wavelan here. David, could you
       * close the device before suspending them ? And, by the way,
       * could you, on resume, add a "route add -net ..." after the
       * ifconfig up ? Thanks... */

      /* Stop receiving new messages and wait end of transmission */
      wv_ru_stop(dev);

      /* Power down the module */
      hacr_write(dev->base_addr, HACR_DEFAULT & (~HACR_PWR_STAT));

      /* The card is now suspended */
      link->state |= DEV_SUSPEND;
      /* Fall through... */
      case CS_EVENT_RESET_PHYSICAL:
      if(link->state & DEV_CONFIG)
        {
                if(link->open)
            netif_device_detach(dev);
                CardServices(ReleaseConfiguration, link->handle);
        }
      break;

      case CS_EVENT_PM_RESUME:
      link->state &= ~DEV_SUSPEND;
      /* Fall through... */
      case CS_EVENT_CARD_RESET:
      if(link->state & DEV_CONFIG)
        {
                CardServices(RequestConfiguration, link->handle, &link->conf);
                if(link->open)      /* If RESET -> True, If RESUME -> False ? */
            {
            wv_hw_reset(dev);
            netif_device_attach(dev);
            }
        }
      break;
    }

#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "<-wavelan_event()\n");
#endif
  return 0;
}

/****************************** MODULE ******************************/
/*
 * Module entry points : insertion & removal
 */

/*------------------------------------------------------------------*/
/*
 * Module insertion : initialisation of the module.
 * Register the card with cardmgr...
 */
static int __init
init_wavelan_cs(void)
{
  servinfo_t      serv;

#ifdef DEBUG_MODULE_TRACE
  printk(KERN_DEBUG "-> init_wavelan_cs()\n");
#ifdef DEBUG_VERSION_SHOW
  printk(KERN_DEBUG "%s", version);
#endif
#endif

  CardServices(GetCardServicesInfo, &serv);
  if(serv.Revision != CS_RELEASE_CODE)
    {
#ifdef DEBUG_CONFIG_ERRORS
      printk(KERN_WARNING "init_wavelan_cs: Card Services release does not match!\n");
#endif
      return -EINVAL;
    }

  register_pccard_driver(&dev_info, &wavelan_attach, &wavelan_detach);

#ifdef DEBUG_MODULE_TRACE
  printk(KERN_DEBUG "<- init_wavelan_cs()\n");
#endif
  return 0;
}

/*------------------------------------------------------------------*/
/*
 * Module removal
 */
static void __exit
exit_wavelan_cs(void)
{
#ifdef DEBUG_MODULE_TRACE
  printk(KERN_DEBUG "-> cleanup_module()\n");
#endif
#ifdef DEBUG_BASIC_SHOW
  printk(KERN_NOTICE "wavelan_cs: unloading\n");
#endif

  /* Do some cleanup of the device list */
  wv_flush_stale_links();

  /* If there remain some devices... */
#ifdef DEBUG_CONFIG_ERRORS
  if(dev_list != NULL)
    {
      /* Honestly, if this happen we are in a deep s**t */
      printk(KERN_INFO "wavelan_cs: devices remaining when removing module\n");
      printk(KERN_INFO "Please flush your disks and reboot NOW !\n");
    }
#endif

  unregister_pccard_driver(&dev_info);

#ifdef DEBUG_MODULE_TRACE
  printk(KERN_DEBUG "<- cleanup_module()\n");
#endif
}

module_init(init_wavelan_cs);
module_exit(exit_wavelan_cs);

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