wavelan_cs.c 130.8 KB
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/*
 *	Wavelan Pcmcia driver
 *
 *		Jean II - HPLB '96
 *
 * Reorganisation and extension of the driver.
 * Original copyright follow. See wavelan_cs.p.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.         
 ****************************************************************************
 *
 */

/* Do *NOT* add other headers here, you are guaranteed to be wrong - Jean II */
#include "wavelan_cs.p.h"		/* Private header */

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#ifdef WAVELAN_ROAMING
static void wl_cell_expiry(unsigned long data);
static void wl_del_wavepoint(wavepoint_history *wavepoint, struct net_local *lp);
static void wv_nwid_filter(unsigned char mode, net_local *lp);
#endif  /*  WAVELAN_ROAMING  */

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

/******************* 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.
 */
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static void
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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(struct net_device *	dev,
	 int		o,	/* offset in PSA */
	 u_char *	b,	/* buffer to fill */
	 int		n)	/* size to read */
{
  net_local *lp = netdev_priv(dev);
  u_char __iomem *ptr = lp->mem + 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 */

/*------------------------------------------------------------------*/
/*
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 * Write the Parameter Storage Area to the WaveLAN card's memory
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 */
static void
psa_write(struct net_device *	dev,
	  int		o,	/* Offset in psa */
	  u_char *	b,	/* Buffer in memory */
	  int		n)	/* Length of buffer */
{
  net_local *lp = netdev_priv(dev);
  u_char __iomem *ptr = lp->mem + PSA_ADDR + (o << 1);
  int		count = 0;
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  unsigned int	base = dev->base_addr;
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  /* 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 __iomem *verify = lp->mem + PSA_ADDR +
    (psaoff(0, psa_comp_number) << 1);

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  /* Authorize writing to PSA */
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  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(struct net_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.
 */
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static void
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mmc_out(u_long		base,
	u_short		o,
	u_char		d)
{
  int count = 0;

  /* Wait for MMC to go idle */
  while((count++ < 100) && (inb(HASR(base)) & HASR_MMI_BUSY))
    udelay(10);

  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 !
 */
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static void
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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...
 */
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static u_char
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mmc_in(u_long	base,
       u_short	o)
{
  int count = 0;

  while((count++ < 100) && (inb(HASR(base)) & HASR_MMI_BUSY))
    udelay(10);
  outb(o << 1, MMR(base));		/* Set the read address */

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

  while((count++ < 100) && (inb(HASR(base)) & HASR_MMI_BUSY))
    udelay(10);
  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 !
 */
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static void
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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...
 */
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static void
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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)));
    }
}


/*------------------------------------------------------------------*/
/*
 * 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 */
}

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

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

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

  /* 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);
}
 
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static void wv_roam_cleanup(struct net_device *dev)
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{
  wavepoint_history *ptr,*old_ptr;
  net_local *lp= netdev_priv(dev);
  
  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 */
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static void wv_nwid_filter(unsigned char mode, net_local *lp)
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{
  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 */
  spin_lock_irqsave(&lp->spinlock, 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 */
  spin_unlock_irqrestore(&lp->spinlock, flags);
}

/* Find a record in the WavePoint table matching a given NWID */
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static wavepoint_history *wl_roam_check(unsigned short nwid, net_local *lp)
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{
  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 */
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static wavepoint_history *wl_new_wavepoint(unsigned short nwid, unsigned char seq, net_local* lp)
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{
  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;
  
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  new_wavepoint = kmalloc(sizeof(wavepoint_history),GFP_ATOMIC);
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  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 */
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static void wl_del_wavepoint(wavepoint_history *wavepoint, struct net_local *lp)
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{
  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 */ 
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static void wl_cell_expiry(unsigned long data)
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{
  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(time_after(jiffies, wavepoint->last_seen + 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 */
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static void wl_update_history(wavepoint_history *wavepoint, unsigned char sigqual, unsigned char seq)	
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{
  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 */
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static void wv_roam_handover(wavepoint_history *wavepoint, net_local *lp)
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{
710
  unsigned int		base = lp->dev->base_addr;
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  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 */
  spin_lock_irqsave(&lp->spinlock, 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 */
  spin_unlock_irqrestore(&lp->spinlock, flags);

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

/* Called when a WavePoint beacon is received */
740 741 742
static void wl_roam_gather(struct net_device *  dev,
			   u_char *  hdr,   /* Beacon header */
			   u_char *  stats) /* SNR, Signal quality
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						      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 = netdev_priv(dev);              /* 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;
796
  static const wavepoint_beacon beacon_template={0xaa,0xaa,0x03,0x08,0x00,0x0e,0x20,0x03,0x00};
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  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(struct net_device *	dev,
	     char *	str,
	     int	cmd,
	     int	result)
{
823
  unsigned int	base = dev->base_addr;
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  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));

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  /* If the interrupt hasn't been posted */
  if (spin < 0) {
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#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(struct net_device *	dev)
{
930 931
  return(wv_82593_cmd(dev, "wv_diag(): diagnose",
		      OP0_DIAGNOSE, SR0_DIAGNOSE_PASSED));
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} /* 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(struct net_device *	dev,
	     int	addr,
	     char *	buf,
	     int	len)
{
946
  unsigned int	base = dev->base_addr;
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  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...
 */
981
static void
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wv_82593_reconfig(struct net_device *	dev)
{
  net_local *		lp = netdev_priv(dev);
985
  struct pcmcia_device *		link = lp->link;
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  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)))
    {
      spin_lock_irqsave(&lp->spinlock, flags);	/* Disable interrupts */
      wv_82593_config(dev);
      spin_unlock_irqrestore(&lp->spinlock, flags);	/* Re-enable interrupts */
    }
  else
    {
#ifdef DEBUG_IOCTL_INFO
      printk(KERN_DEBUG
	     "%s: wv_82593_reconfig(): delayed (state = %lX, link = %d)\n",
	     dev->name, dev->state, 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
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  printk(KERN_DEBUG "psa_unused0[]: %pM\n", p->psa_unused0);
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#endif	/* DEBUG_SHOW_UNUSED */
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  printk(KERN_DEBUG "psa_univ_mac_addr[]: %pM\n", p->psa_univ_mac_addr);
  printk(KERN_DEBUG "psa_local_mac_addr[]: %pM\n", p->psa_local_mac_addr);
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  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
1072
  printk(KERN_DEBUG "psa_reserved[]: %02X:%02X\n",
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	 p->psa_reserved[0],
1074
	 p->psa_reserved[1]);
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#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(struct net_device *	dev)
{
1091
  unsigned int	base = dev->base_addr;
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  net_local *	lp = netdev_priv(dev);
  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;
    }

  spin_lock_irqsave(&lp->spinlock, 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);

  /* Don't forget to update statistics */
  lp->wstats.discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l;

  spin_unlock_irqrestore(&lp->spinlock, 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 */
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  printk(KERN_DEBUG "Encryption algorithm: %02X - Status: %02X\n",
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	 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(struct net_device *	dev)
{
  net_local *lp = netdev_priv(dev);

  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(struct net_device *	dev)
{
  printk(KERN_DEBUG "dev:");
  printk(" state=%lX,", dev->state);
  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(struct net_device *	dev)
{
  net_local *lp = netdev_priv(dev);

  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
 */
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static void
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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;

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  printk(KERN_DEBUG "%s: %s(): dest %pM, length %d\n",
	 msg1, msg2, p, length);
  printk(KERN_DEBUG "%s: %s(): src %pM, type 0x%02X%02X\n",
	 msg1, msg2, &p[6], p[12], p[13]);
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#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...
 */
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static void
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wv_init_info(struct net_device *	dev)
{
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  unsigned int	base = dev->base_addr;
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  psa_t		psa;

  /* 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 */
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  printk(KERN_NOTICE "%s: WaveLAN: port %#x, irq %d, hw_addr %pM",
	 dev->name, base, dev->irq, dev->dev_addr);
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  /* 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
 */


/*------------------------------------------------------------------*/
/*
 * 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(struct net_device *	dev)
{
  net_local *	lp = netdev_priv(dev);

#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);
	}
    }
  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);
	  }
      }
    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(struct net_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 */


/*------------------------------------------------------------------*/
/*
 * Frequency setting (for hardware able of it)
 * It's a bit complicated and you don't really want to look into it...
 */
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static int
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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);

1611
      /* We now should verify here that the EEprom writing was ok */
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      /* 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
 */
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static int
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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 */
  const int	BAND_NUM = 10;	/* Number of bands */
  int		c = 0;		/* Channel number */

  /* 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)))
      {
	/* Compute approximate channel number */
	while((((channel_bands[c] >> 1) - 24) < freq) &&
	      (c < BAND_NUM))
	  c++;
	list[i].i = c;	/* Set the list index */

	/* 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 IW_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(struct net_device *	dev,
	      u_char *	mac,		/* MAC address */
	      u_char *	stats)		/* Statistics to gather */
{
  struct iw_quality wstats;

  wstats.qual = stats[2] & MMR_SGNL_QUAL;
  wstats.level = stats[0] & MMR_SIGNAL_LVL;
  wstats.noise = stats[1] & MMR_SILENCE_LVL;
  wstats.updated = 0x7;

  /* Update spy records */
  wireless_spy_update(dev, mac, &wstats);
}
#endif	/* IW_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(struct net_device *	dev,
	      u_char *	stats)		/* Statistics to gather */
{
  net_local *	lp = netdev_priv(dev);
  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 */

static void wl_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
{
	strncpy(info->driver, "wavelan_cs", sizeof(info->driver)-1);
}

1772
static const struct ethtool_ops ops = {
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	.get_drvinfo = wl_get_drvinfo
};

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get protocol name
 */
static int wavelan_get_name(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	strcpy(wrqu->name, "WaveLAN");
	return 0;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set NWID
 */
static int wavelan_set_nwid(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
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	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	psa_t psa;
	mm_t m;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Set NWID in WaveLAN. */
	if (!wrqu->nwid.disabled) {
		/* Set NWID in psa */
		psa.psa_nwid[0] = (wrqu->nwid.value & 0xFF00) >> 8;
		psa.psa_nwid[1] = wrqu->nwid.value & 0xFF;
		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);

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get NWID 
 */
static int wavelan_get_nwid(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Read the NWID. */
	psa_read(dev,
		 (char *) psa.psa_nwid - (char *) &psa,
		 (unsigned char *) psa.psa_nwid, 3);
	wrqu->nwid.value = (psa.psa_nwid[0] << 8) + psa.psa_nwid[1];
	wrqu->nwid.disabled = !(psa.psa_nwid_select);
	wrqu->nwid.fixed = 1;	/* Superfluous */

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set frequency
 */
static int wavelan_set_freq(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
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	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	unsigned long flags;
	int ret;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* 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, &(wrqu->freq));
	else
		ret = -EOPNOTSUPP;

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get frequency
 */
static int wavelan_get_freq(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
1918
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* 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, &freq, 1);
		wrqu->freq.m = ((freq >> 5) * 5 + 24000L) * 10000;
		wrqu->freq.e = 1;
	} else {
		psa_read(dev,
			 (char *) &psa.psa_subband - (char *) &psa,
			 (unsigned char *) &psa.psa_subband, 1);

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

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set level threshold
 */
static int wavelan_set_sens(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
1964
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Set the level threshold. */
	/* We should complain loudly if wrqu->sens.fixed = 0, because we
	 * can't set auto mode... */
	psa.psa_thr_pre_set = wrqu->sens.value & 0x3F;
	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);

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get level threshold
 */
static int wavelan_get_sens(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Read the level threshold. */
	psa_read(dev,
		 (char *) &psa.psa_thr_pre_set - (char *) &psa,
		 (unsigned char *) &psa.psa_thr_pre_set, 1);
	wrqu->sens.value = psa.psa_thr_pre_set & 0x3F;
	wrqu->sens.fixed = 1;

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set encryption key
 */
static int wavelan_set_encode(struct net_device *dev,
			      struct iw_request_info *info,
			      union iwreq_data *wrqu,
			      char *extra)
{
2030
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	unsigned long flags;
	psa_t psa;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);

	/* Check if capable of encryption */
	if (!mmc_encr(base)) {
		ret = -EOPNOTSUPP;
	}

	/* Check the size of the key */
	if((wrqu->encoding.length != 8) && (wrqu->encoding.length != 0)) {
		ret = -EINVAL;
	}

	if(!ret) {
		/* Basic checking... */
		if (wrqu->encoding.length == 8) {
			/* Copy the key in the driver */
			memcpy(psa.psa_encryption_key, extra,
			       wrqu->encoding.length);
			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);
		}

		/* disable encryption */
		if (wrqu->encoding.flags & IW_ENCODE_DISABLED) {
			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);
	}

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get encryption key
 */
static int wavelan_get_encode(struct net_device *dev,
			      struct iw_request_info *info,
			      union iwreq_data *wrqu,
			      char *extra)
{
2100
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Check if encryption is available */
	if (!mmc_encr(base)) {
		ret = -EOPNOTSUPP;
	} else {
		/* Read the encryption key */
		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)
			wrqu->encoding.flags = IW_ENCODE_ENABLED;
		else
			wrqu->encoding.flags = IW_ENCODE_DISABLED;
		wrqu->encoding.flags |= mmc_encr(base);

		/* Copy the key to the user buffer */
		wrqu->encoding.length = 8;
		memcpy(extra, psa.psa_encryption_key, wrqu->encoding.length);
	}

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

#ifdef WAVELAN_ROAMING_EXT
/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set ESSID (domain)
 */
static int wavelan_set_essid(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
	net_local *lp = netdev_priv(dev);
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Check if disable */
	if(wrqu->data.flags == 0)
		lp->filter_domains = 0;
	else {
		char	essid[IW_ESSID_MAX_SIZE + 1];
		char *	endp;

		/* Terminate the string */
		memcpy(essid, extra, wrqu->data.length);
		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;
		}
	}

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get ESSID (domain)
 */
static int wavelan_get_essid(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
	net_local *lp = netdev_priv(dev);

	/* Is the domain ID active ? */
	wrqu->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(extra, "%lX", lp->domain_id);
	extra[IW_ESSID_MAX_SIZE] = '\0';

	/* Set the length */
2207
	wrqu->data.length = strlen(extra);
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	return 0;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set AP address
 */
static int wavelan_set_wap(struct net_device *dev,
			   struct iw_request_info *info,
			   union iwreq_data *wrqu,
			   char *extra)
{
#ifdef DEBUG_IOCTL_INFO
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	printk(KERN_DEBUG "Set AP to : %pM\n", wrqu->ap_addr.sa_data);
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#endif	/* DEBUG_IOCTL_INFO */

	return -EOPNOTSUPP;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get AP address
 */
static int wavelan_get_wap(struct net_device *dev,
			   struct iw_request_info *info,
			   union iwreq_data *wrqu,
			   char *extra)
{
	/* Should get the real McCoy instead of own Ethernet address */
	memcpy(wrqu->ap_addr.sa_data, dev->dev_addr, WAVELAN_ADDR_SIZE);
	wrqu->ap_addr.sa_family = ARPHRD_ETHER;

	return -EOPNOTSUPP;
}
#endif	/* WAVELAN_ROAMING_EXT */

#ifdef WAVELAN_ROAMING
/*------------------------------------------------------------------*/
/*
 * Wireless Handler : set mode
 */
static int wavelan_set_mode(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	net_local *lp = netdev_priv(dev);
	unsigned long flags;
	int ret = 0;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);

	/* Check mode */
	switch(wrqu->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;
	}

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get mode
 */
static int wavelan_get_mode(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	if(do_roaming)
		wrqu->mode = IW_MODE_INFRA;
	else
		wrqu->mode = IW_MODE_ADHOC;

	return 0;
}
#endif	/* WAVELAN_ROAMING */

/*------------------------------------------------------------------*/
/*
 * Wireless Handler : get range info
 */
static int wavelan_get_range(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
2313
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	struct iw_range *range = (struct iw_range *) extra;
	unsigned long flags;
	int ret = 0;

	/* Set the length (very important for backward compatibility) */
	wrqu->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(struct iw_range));

	/* Set the Wireless Extension versions */
	range->we_version_compiled = WIRELESS_EXT;
	range->we_version_source = 9;

	/* 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;

	range->sensitivity = 0x3F;
	range->max_qual.qual = MMR_SGNL_QUAL;
	range->max_qual.level = MMR_SIGNAL_LVL;
	range->max_qual.noise = MMR_SILENCE_LVL;
	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;

	range->num_bitrates = 1;
	range->bitrate[0] = 2000000;	/* 2 Mb/s */

	/* Event capability (kernel + driver) */
	range->event_capa[0] = (IW_EVENT_CAPA_MASK(0x8B02) |
				IW_EVENT_CAPA_MASK(0x8B04) |
				IW_EVENT_CAPA_MASK(0x8B06));
	range->event_capa[1] = IW_EVENT_CAPA_K_1;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* 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;

	/* 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;
	}

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return ret;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : set quality threshold
 */
static int wavelan_set_qthr(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
2389
	unsigned int base = dev->base_addr;
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	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	psa.psa_quality_thr = *(extra) & 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);

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return 0;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : get quality threshold
 */
static int wavelan_get_qthr(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	net_local *lp = netdev_priv(dev);
	psa_t psa;
	unsigned long flags;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	psa_read(dev,
		 (char *) &psa.psa_quality_thr - (char *) &psa,
		 (unsigned char *) &psa.psa_quality_thr, 1);
	*(extra) = psa.psa_quality_thr & 0x0F;

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return 0;
}

#ifdef WAVELAN_ROAMING
/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : set roaming
 */
static int wavelan_set_roam(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	net_local *lp = netdev_priv(dev);
	unsigned long flags;

	/* Disable interrupts and save flags. */
	spin_lock_irqsave(&lp->spinlock, flags);
	
	/* Note : should check if user == root */
	if(do_roaming && (*extra)==0)
		wv_roam_cleanup(dev);
	else if(do_roaming==0 && (*extra)!=0)
		wv_roam_init(dev);

	do_roaming = (*extra);

	/* Enable interrupts and restore flags. */
	spin_unlock_irqrestore(&lp->spinlock, flags);

	return 0;
}

/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : get quality threshold
 */
static int wavelan_get_roam(struct net_device *dev,
			    struct iw_request_info *info,
			    union iwreq_data *wrqu,
			    char *extra)
{
	*(extra) = do_roaming;

	return 0;
}
#endif	/* WAVELAN_ROAMING */

#ifdef HISTOGRAM
/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : set histogram
 */
static int wavelan_set_histo(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
	net_local *lp = netdev_priv(dev);

	/* Check the number of intervals. */
	if (wrqu->data.length > 16) {
		return(-E2BIG);
	}

	/* Disable histo while we copy the addresses.
	 * As we don't disable interrupts, we need to do this */
	lp->his_number = 0;

	/* Are there ranges to copy? */
	if (wrqu->data.length > 0) {
		/* Copy interval ranges to the driver */
		memcpy(lp->his_range, extra, wrqu->data.length);

		{
		  int i;
		  printk(KERN_DEBUG "Histo :");
		  for(i = 0; i < wrqu->data.length; i++)
		    printk(" %d", lp->his_range[i]);
		  printk("\n");
		}

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

	/* Now we can set the number of ranges */
	lp->his_number = wrqu->data.length;

	return(0);
}

/*------------------------------------------------------------------*/
/*
 * Wireless Private Handler : get histogram
 */
static int wavelan_get_histo(struct net_device *dev,
			     struct iw_request_info *info,
			     union iwreq_data *wrqu,
			     char *extra)
{
	net_local *lp = netdev_priv(dev);

	/* Set the number of intervals. */
	wrqu->data.length = lp->his_number;

	/* Give back the distribution statistics */
	if(lp->his_number > 0)
		memcpy(extra, lp->his_sum, sizeof(long) * lp->his_number);

	return(0);
}
#endif			/* HISTOGRAM */

/*------------------------------------------------------------------*/
/*
 * Structures to export the Wireless Handlers
 */

static const struct iw_priv_args wavelan_private_args[] = {
/*{ 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" },
  { SIOCSIPROAM, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, 0, "setroam" },
  { SIOCGIPROAM, 0, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, "getroam" },
  { SIOCSIPHISTO, IW_PRIV_TYPE_BYTE | 16,                    0, "sethisto" },
  { SIOCGIPHISTO, 0,                     IW_PRIV_TYPE_INT | 16, "gethisto" },
};

static const iw_handler		wavelan_handler[] =
{
	NULL,				/* SIOCSIWNAME */
	wavelan_get_name,		/* SIOCGIWNAME */
	wavelan_set_nwid,		/* SIOCSIWNWID */
	wavelan_get_nwid,		/* SIOCGIWNWID */
	wavelan_set_freq,		/* SIOCSIWFREQ */
	wavelan_get_freq,		/* SIOCGIWFREQ */
#ifdef WAVELAN_ROAMING
	wavelan_set_mode,		/* SIOCSIWMODE */
	wavelan_get_mode,		/* SIOCGIWMODE */
#else	/* WAVELAN_ROAMING */
	NULL,				/* SIOCSIWMODE */
	NULL,				/* SIOCGIWMODE */
#endif	/* WAVELAN_ROAMING */
	wavelan_set_sens,		/* SIOCSIWSENS */
	wavelan_get_sens,		/* SIOCGIWSENS */
	NULL,				/* SIOCSIWRANGE */
	wavelan_get_range,		/* SIOCGIWRANGE */
	NULL,				/* SIOCSIWPRIV */
	NULL,				/* SIOCGIWPRIV */
	NULL,				/* SIOCSIWSTATS */
	NULL,				/* SIOCGIWSTATS */
	iw_handler_set_spy,		/* SIOCSIWSPY */
	iw_handler_get_spy,		/* SIOCGIWSPY */
	iw_handler_set_thrspy,		/* SIOCSIWTHRSPY */
	iw_handler_get_thrspy,		/* SIOCGIWTHRSPY */
#ifdef WAVELAN_ROAMING_EXT
	wavelan_set_wap,		/* SIOCSIWAP */
	wavelan_get_wap,		/* SIOCGIWAP */
	NULL,				/* -- hole -- */
	NULL,				/* SIOCGIWAPLIST */
	NULL,				/* -- hole -- */
	NULL,				/* -- hole -- */
	wavelan_set_essid,		/* SIOCSIWESSID */
	wavelan_get_essid,		/* SIOCGIWESSID */
#else	/* WAVELAN_ROAMING_EXT */
	NULL,				/* SIOCSIWAP */
	NULL,				/* SIOCGIWAP */
	NULL,				/* -- hole -- */
	NULL,				/* SIOCGIWAPLIST */
	NULL,				/* -- hole -- */
	NULL,				/* -- hole -- */
	NULL,				/* SIOCSIWESSID */
	NULL,				/* SIOCGIWESSID */
#endif	/* WAVELAN_ROAMING_EXT */
	NULL,				/* SIOCSIWNICKN */
	NULL,				/* SIOCGIWNICKN */
	NULL,				/* -- hole -- */
	NULL,				/* -- hole -- */
	NULL,				/* SIOCSIWRATE */
	NULL,				/* SIOCGIWRATE */
	NULL,				/* SIOCSIWRTS */
	NULL,				/* SIOCGIWRTS */
	NULL,				/* SIOCSIWFRAG */
	NULL,				/* SIOCGIWFRAG */
	NULL,				/* SIOCSIWTXPOW */
	NULL,				/* SIOCGIWTXPOW */
	NULL,				/* SIOCSIWRETRY */
	NULL,				/* SIOCGIWRETRY */
	wavelan_set_encode,		/* SIOCSIWENCODE */
	wavelan_get_encode,		/* SIOCGIWENCODE */
};

static const iw_handler		wavelan_private_handler[] =
{
	wavelan_set_qthr,		/* SIOCIWFIRSTPRIV */
	wavelan_get_qthr,		/* SIOCIWFIRSTPRIV + 1 */
#ifdef WAVELAN_ROAMING
	wavelan_set_roam,		/* SIOCIWFIRSTPRIV + 2 */
	wavelan_get_roam,		/* SIOCIWFIRSTPRIV + 3 */
#else	/* WAVELAN_ROAMING */
	NULL,				/* SIOCIWFIRSTPRIV + 2 */
	NULL,				/* SIOCIWFIRSTPRIV + 3 */
#endif	/* WAVELAN_ROAMING */
#ifdef HISTOGRAM
	wavelan_set_histo,		/* SIOCIWFIRSTPRIV + 4 */
	wavelan_get_histo,		/* SIOCIWFIRSTPRIV + 5 */
#endif	/* HISTOGRAM */
};

static const struct iw_handler_def	wavelan_handler_def =
{
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	.num_standard	= ARRAY_SIZE(wavelan_handler),
	.num_private	= ARRAY_SIZE(wavelan_private_handler),
	.num_private_args = ARRAY_SIZE(wavelan_private_args),
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	.standard	= wavelan_handler,
	.private	= wavelan_private_handler,
	.private_args	= wavelan_private_args,
	.get_wireless_stats = wavelan_get_wireless_stats,
};

/*------------------------------------------------------------------*/
/*
 * Get wireless statistics
 * Called by /proc/net/wireless...
 */
static iw_stats *
wavelan_get_wireless_stats(struct net_device *	dev)
{
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  unsigned int		base = dev->base_addr;
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  net_local *		lp = netdev_priv(dev);
  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 */
  spin_lock_irqsave(&lp->spinlock, 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 */
  spin_unlock_irqrestore(&lp->spinlock, flags);

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

/************************* 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())
 */
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static int
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wv_start_of_frame(struct net_device *	dev,
		  int		rfp,	/* end of frame */
		  int		wrap)	/* start of buffer */
{
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  unsigned int	base = dev->base_addr;
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  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())
 */
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static void
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wv_packet_read(struct net_device *		dev,
	       int		fd_p,
	       int		sksize)
{
  net_local *		lp = netdev_priv(dev);
  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
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      dev->stats.rx_dropped++;
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      /*
       * 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_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
2818
  wv_packet_info(skb_mac_header(skb), sksize, dev->name, "wv_packet_read");
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#endif	/* DEBUG_RX_INFO */
     
  /* Statistics gathering & stuff associated.
   * It seem a bit messy with all the define, but it's really simple... */
  if(
#ifdef IW_WIRELESS_SPY
     (lp->spy_data.spy_number > 0) ||
#endif	/* IW_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
2852
      wl_spy_gather(dev, skb_mac_header(skb) + WAVELAN_ADDR_SIZE, stats);
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#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 */
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  dev->stats.rx_packets++;
  dev->stats.rx_bytes += sksize;
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#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.
 */
2885
static void
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wv_packet_rcv(struct net_device *	dev)
{
2888
  unsigned int	base = dev->base_addr;
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  net_local *	lp = netdev_priv(dev);
  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)
	{
2968
	  dev->stats.rx_errors++;
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	  if(status & RX_NO_SFD)
2970
	    dev->stats.rx_frame_errors++;
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	  if(status & RX_CRC_ERR)
2972
	    dev->stats.rx_crc_errors++;
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	  if(status & RX_OVRRUN)
2974
	    dev->stats.rx_over_errors++;
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#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())
 */
3019
static void
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wv_packet_write(struct net_device *	dev,
		void *		buf,
		short		length)
{
  net_local *		lp = netdev_priv(dev);
3025
  unsigned int		base = dev->base_addr;
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  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

  spin_lock_irqsave(&lp->spinlock, flags);

  /* 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);

  /* Make sure the watchdog will keep quiet for a while */
  dev->trans_start = jiffies;

  /* Keep stats up to date */
3061
  dev->stats.tx_bytes += length;
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  spin_unlock_irqrestore(&lp->spinlock, 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,
		    struct net_device *		dev)
{
  net_local *		lp = netdev_priv(dev);
  unsigned long		flags;

#ifdef DEBUG_TX_TRACE
  printk(KERN_DEBUG "%s: ->wavelan_packet_xmit(0x%X)\n", dev->name,
	 (unsigned) skb);
#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)
    {
      spin_lock_irqsave(&lp->spinlock, flags);	/* Disable interrupts */
      wv_82593_config(dev);
      spin_unlock_irqrestore(&lp->spinlock, 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

	/* Check if we need some padding */
	/* Note : on wireless the propagation time is in the order of 1us,
	 * and we don't have the Ethernet specific requirement of beeing
	 * able to detect collisions, therefore in theory we don't really
	 * need to pad. Jean II */
3120 3121
	if (skb_padto(skb, ETH_ZLEN))
		return 0;
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  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())
 */
3143
static int
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wv_mmc_init(struct net_device *	dev)
{
3146
  unsigned int	base = dev->base_addr;
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  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...
   */
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  for (i = 0; i < ARRAY_SIZE(MAC_ADDRESSES); 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]))
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      break;

  /* If we have not found it... */
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  if (i == ARRAY_SIZE(MAC_ADDRESSES))
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    {
#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(struct net_device *	dev)
{
3340
  unsigned int	base = dev->base_addr;
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  net_local *	lp = netdev_priv(dev);
  unsigned long	flags;
  int		status;
  int		spin;

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

  spin_lock_irqsave(&lp->spinlock, 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));

  spin_unlock_irqrestore(&lp->spinlock, flags);

  /* If there was a problem */
  if(spin <= 0)
    {
#ifdef DEBUG_CONFIG_ERRORS
      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(struct net_device *	dev)
{
3403
  unsigned int	base = dev->base_addr;
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  net_local *	lp = netdev_priv(dev);
  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;

  spin_lock_irqsave(&lp->spinlock, 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

  spin_unlock_irqrestore(&lp->spinlock, 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(struct net_device *	dev)
{
3491
  unsigned int			base = dev->base_addr;
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  net_local *			lp = netdev_priv(dev);
  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;
R
Robert P. J. Day 已提交
3516 3517 3518
  cfblk.lin_prio = 0;   	/* conform to 802.3 backoff algorithm */
  cfblk.exp_prio = 5;	        /* conform to 802.3 backoff algorithm */
  cfblk.bof_met = 1;	        /* conform to 802.3 backoff algorithm */
3519 3520
  cfblk.ifrm_spc = 0x20 >> 4;	/* 32 bit times interframe spacing */
  cfblk.slottim_low = 0x20 >> 5;	/* 32 bit times slot time */
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3521 3522 3523 3524 3525 3526 3527 3528 3529 3530 3531 3532 3533 3534 3535 3536 3537 3538 3539 3540 3541 3542 3543 3544 3545 3546 3547 3548 3549 3550 3551 3552 3553 3554 3555 3556 3557 3558 3559 3560 3561 3562 3563 3564 3565 3566 3567 3568 3569 3570 3571 3572 3573 3574 3575 3576 3577 3578 3579 3580 3581 3582 3583 3584 3585 3586 3587 3588 3589 3590 3591 3592 3593 3594 3595 3596 3597 3598 3599 3600 3601 3602 3603 3604 3605 3606 3607 3608 3609 3610 3611 3612 3613 3614 3615 3616 3617 3618 3619 3620 3621
  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)
J
Johannes Berg 已提交
3622
	printk(KERN_DEBUG " %pM\n", dmi->dmi_addr);
L
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3623 3624 3625 3626 3627 3628 3629 3630 3631 3632 3633 3634 3635 3636 3637 3638 3639 3640 3641 3642 3643 3644 3645 3646 3647 3648 3649 3650 3651 3652 3653 3654 3655 3656 3657 3658 3659
#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())
 */
3660
static int
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Linus Torvalds 已提交
3661 3662 3663 3664
wv_pcmcia_reset(struct net_device *	dev)
{
  int		i;
  conf_reg_t	reg = { 0, CS_READ, CISREG_COR, 0 };
3665
  struct pcmcia_device *	link = ((net_local *)netdev_priv(dev))->link;
L
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3666 3667 3668 3669 3670

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

3671
  i = pcmcia_access_configuration_register(link, &reg);
D
Dominik Brodowski 已提交
3672
  if (i != 0)
L
Linus Torvalds 已提交
3673
    {
3674
      cs_error(link, AccessConfigurationRegister, i);
L
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3675 3676 3677 3678 3679 3680 3681 3682 3683 3684
      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;
3685
  i = pcmcia_access_configuration_register(link, &reg);
D
Dominik Brodowski 已提交
3686
  if (i != 0)
L
Linus Torvalds 已提交
3687
    {
3688
      cs_error(link, AccessConfigurationRegister, i);
L
Linus Torvalds 已提交
3689 3690 3691 3692 3693
      return FALSE;
    }
      
  reg.Action = CS_WRITE;
  reg.Value = COR_LEVEL_IRQ | COR_CONFIG;
3694
  i = pcmcia_access_configuration_register(link, &reg);
D
Dominik Brodowski 已提交
3695
  if (i != 0)
L
Linus Torvalds 已提交
3696
    {
3697
      cs_error(link, AccessConfigurationRegister, i);
L
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3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725
      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(struct net_device *	dev)
{
  net_local *		lp = netdev_priv(dev);
3726
  unsigned int		base = dev->base_addr;
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Linus Torvalds 已提交
3727 3728 3729 3730 3731 3732 3733
  unsigned long		flags;
  int			ret = FALSE;

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

3734 3735 3736 3737
  /* compile-time check the sizes of structures */
  BUILD_BUG_ON(sizeof(psa_t) != PSA_SIZE);
  BUILD_BUG_ON(sizeof(mmw_t) != MMW_SIZE);
  BUILD_BUG_ON(sizeof(mmr_t) != MMR_SIZE);
L
Linus Torvalds 已提交
3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757 3758 3759 3760 3761 3762 3763 3764 3765 3766 3767 3768 3769 3770 3771 3772 3773 3774 3775 3776 3777 3778 3779 3780 3781 3782 3783 3784 3785 3786 3787 3788 3789 3790 3791 3792 3793 3794 3795 3796 3797 3798 3799 3800 3801 3802 3803 3804 3805 3806 3807 3808 3809 3810 3811 3812 3813 3814 3815 3816 3817 3818 3819 3820 3821 3822 3823 3824

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

  /* Disable interrupts */
  spin_lock_irqsave(&lp->spinlock, 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 */
  spin_unlock_irqrestore(&lp->spinlock, 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())
 */
3825
static void
L
Linus Torvalds 已提交
3826 3827 3828 3829 3830 3831 3832 3833 3834 3835 3836 3837 3838 3839 3840 3841 3842 3843 3844 3845 3846 3847 3848 3849 3850 3851 3852 3853 3854 3855
wv_hw_reset(struct net_device *	dev)
{
  net_local *	lp = netdev_priv(dev);

#ifdef DEBUG_CONFIG_TRACE
  printk(KERN_DEBUG "%s: ->wv_hw_reset()\n", dev->name);
#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())
 */
3856
static int
3857
wv_pcmcia_config(struct pcmcia_device *	link)
L
Linus Torvalds 已提交
3858 3859 3860 3861 3862 3863 3864 3865 3866 3867 3868 3869 3870 3871
{
  struct net_device *	dev = (struct net_device *) link->priv;
  int			i;
  win_req_t		req;
  memreq_t		mem;
  net_local *		lp = netdev_priv(dev);


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

  do
    {
3872
      i = pcmcia_request_io(link, &link->io);
D
Dominik Brodowski 已提交
3873
      if (i != 0)
L
Linus Torvalds 已提交
3874
	{
3875
	  cs_error(link, RequestIO, i);
L
Linus Torvalds 已提交
3876 3877 3878 3879 3880 3881 3882
	  break;
	}

      /*
       * Now allocate an interrupt line.  Note that this does not
       * actually assign a handler to the interrupt.
       */
3883
      i = pcmcia_request_irq(link, &link->irq);
D
Dominik Brodowski 已提交
3884
      if (i != 0)
L
Linus Torvalds 已提交
3885
	{
3886
	  cs_error(link, RequestIRQ, i);
L
Linus Torvalds 已提交
3887 3888 3889 3890 3891 3892 3893 3894
	  break;
	}

      /*
       * This actually configures the PCMCIA socket -- setting up
       * the I/O windows and the interrupt mapping.
       */
      link->conf.ConfigIndex = 1;
3895
      i = pcmcia_request_configuration(link, &link->conf);
D
Dominik Brodowski 已提交
3896
      if (i != 0)
L
Linus Torvalds 已提交
3897
	{
3898
	  cs_error(link, RequestConfiguration, i);
L
Linus Torvalds 已提交
3899 3900 3901 3902
	  break;
	}

      /*
3903
       * Allocate a small memory window.  Note that the struct pcmcia_device
L
Linus Torvalds 已提交
3904 3905 3906 3907 3908 3909 3910
       * 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;
3911
      i = pcmcia_request_window(&link, &req, &link->win);
D
Dominik Brodowski 已提交
3912
      if (i != 0)
L
Linus Torvalds 已提交
3913
	{
3914
	  cs_error(link, RequestWindow, i);
L
Linus Torvalds 已提交
3915 3916 3917 3918 3919 3920 3921 3922 3923
	  break;
	}

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

      mem.CardOffset = 0; mem.Page = 0;
      i = pcmcia_map_mem_page(link->win, &mem);
D
Dominik Brodowski 已提交
3924
      if (i != 0)
L
Linus Torvalds 已提交
3925
	{
3926
	  cs_error(link, MapMemPage, i);
L
Linus Torvalds 已提交
3927 3928 3929 3930 3931 3932 3933 3934 3935 3936 3937 3938 3939
	  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 %p IRQ %d IOPORT 0x%x\n",
	     lp->mem, dev->irq, (u_int) dev->base_addr);
#endif

3940
      SET_NETDEV_DEV(dev, &handle_to_dev(link));
L
Linus Torvalds 已提交
3941 3942 3943 3944 3945 3946 3947 3948 3949 3950 3951 3952 3953 3954 3955 3956 3957 3958 3959
      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 !!! */

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

  strcpy(((net_local *) netdev_priv(dev))->node.dev_name, dev->name);
3960
  link->dev_node = &((net_local *) netdev_priv(dev))->node;
L
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3961 3962 3963 3964 3965 3966 3967 3968 3969 3970 3971 3972 3973 3974

#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
3975
wv_pcmcia_release(struct pcmcia_device *link)
L
Linus Torvalds 已提交
3976
{
3977 3978
	struct net_device *	dev = (struct net_device *) link->priv;
	net_local *		lp = netdev_priv(dev);
L
Linus Torvalds 已提交
3979 3980

#ifdef DEBUG_CONFIG_TRACE
3981
	printk(KERN_DEBUG "%s: -> wv_pcmcia_release(0x%p)\n", dev->name, link);
L
Linus Torvalds 已提交
3982 3983
#endif

3984
	iounmap(lp->mem);
3985
	pcmcia_disable_device(link);
L
Linus Torvalds 已提交
3986 3987

#ifdef DEBUG_CONFIG_TRACE
3988
	printk(KERN_DEBUG "%s: <- wv_pcmcia_release()\n", dev->name);
L
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3989 3990 3991 3992 3993 3994 3995 3996 3997 3998 3999 4000 4001 4002 4003
#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 irqreturn_t
wavelan_interrupt(int		irq,
4004
		  void *	dev_id)
L
Linus Torvalds 已提交
4005
{
4006
  struct net_device *	dev = dev_id;
L
Linus Torvalds 已提交
4007
  net_local *	lp;
4008
  unsigned int	base;
L
Linus Torvalds 已提交
4009 4010 4011 4012 4013 4014 4015 4016 4017 4018 4019 4020 4021 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4037 4038 4039 4040 4041 4042 4043 4044 4045 4046 4047 4048 4049 4050 4051 4052 4053 4054 4055 4056 4057 4058 4059 4060 4061 4062 4063 4064 4065 4066 4067 4068 4069 4070 4071 4072 4073 4074 4075 4076 4077 4078 4079 4080 4081 4082 4083 4084 4085 4086 4087 4088 4089 4090 4091 4092 4093
  int		status0;
  u_int		tx_status;

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

  lp = netdev_priv(dev);
  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 interrupts are disabled 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
4094
	      dev->stats.rx_over_errors++;
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	      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

	  /* 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)
	    {
4143
	      dev->stats.tx_errors++;
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	      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
4158
		  dev->stats.tx_aborted_errors++;
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		}
	      if(tx_status & TX_LOST_CTS)
		{
#ifdef DEBUG_TX_FAIL
		  printk(KERN_DEBUG "%s: wv_interrupt(): no CTS\n", dev->name);
#endif
4165
		  dev->stats.tx_carrier_errors++;
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		}
	      if(tx_status & TX_LOST_CRS)
		{
#ifdef DEBUG_TX_FAIL
		  printk(KERN_DEBUG "%s: wv_interrupt(): no carrier\n",
			 dev->name);
#endif
4173
		  dev->stats.tx_carrier_errors++;
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		}
	      if(tx_status & TX_HRT_BEAT)
		{
#ifdef DEBUG_TX_FAIL
		  printk(KERN_DEBUG "%s: wv_interrupt(): heart beat\n", dev->name);
#endif
4180
		  dev->stats.tx_heartbeat_errors++;
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		}
	      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))
			{
4204
			  dev->stats.collisions += 0x10;
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			}
		    }
		}
	    }	/* if(!(tx_status & TX_OK)) */

4210 4211
	  dev->stats.collisions += (tx_status & TX_NCOL_MASK);
	  dev->stats.tx_packets++;
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	  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

  /* We always return IRQ_HANDLED, because we will receive empty
   * interrupts under normal operations. Anyway, it doesn't matter
   * as we are dealing with an ISA interrupt that can't be shared.
   *
   * Explanation : under heavy receive, the following happens :
   * ->wavelan_interrupt()
   *    (status0 & SR0_INTERRUPT) != 0
   *       ->wv_packet_rcv()
   *    (status0 & SR0_INTERRUPT) != 0
   *       ->wv_packet_rcv()
   *    (status0 & SR0_INTERRUPT) == 0	// i.e. no more event
   * <-wavelan_interrupt()
   * ->wavelan_interrupt()
   *    (status0 & SR0_INTERRUPT) == 0	// i.e. empty interrupt
   * <-wavelan_interrupt()
   * Jean II */
  return IRQ_HANDLED;
} /* 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
wavelan_watchdog(struct net_device *	dev)
{
  net_local *		lp = netdev_priv(dev);
4267
  unsigned int		base = dev->base_addr;
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  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

  spin_lock_irqsave(&lp->spinlock, 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 */
  spin_unlock_irqrestore(&lp->spinlock, 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(struct net_device *	dev)
{
  net_local *	lp = netdev_priv(dev);
4342
  struct pcmcia_device *	link = lp->link;
4343
  unsigned int	base = dev->base_addr;
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#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);

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

#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(struct net_device *	dev)
{
4396
  struct pcmcia_device *	link = ((net_local *)netdev_priv(dev))->link;
4397
  unsigned int	base = dev->base_addr;
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#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 */

  link->open--;

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

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

4439 4440 4441 4442 4443 4444 4445 4446 4447 4448 4449 4450 4451
static const struct net_device_ops wavelan_netdev_ops = {
	.ndo_open 		= wavelan_open,
	.ndo_stop		= wavelan_close,
	.ndo_start_xmit		= wavelan_packet_xmit,
	.ndo_set_multicast_list = wavelan_set_multicast_list,
#ifdef SET_MAC_ADDRESS
	.ndo_set_mac_address	= wavelan_set_mac_address,
#endif
	.ndo_tx_timeout		= wavelan_watchdog,
	.ndo_change_mtu		= eth_change_mtu,
	.ndo_validate_addr	= eth_validate_addr,
};

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/*------------------------------------------------------------------*/
/*
 * 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.
 */
4462
static int
4463
wavelan_probe(struct pcmcia_device *p_dev)
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{
  struct net_device *	dev;		/* Interface generic data */
  net_local *	lp;		/* Interface specific data */
4467
  int ret;
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#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "-> wavelan_attach()\n");
#endif

  /* The io structure describes IO port mapping */
4474 4475 4476
  p_dev->io.NumPorts1 = 8;
  p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
  p_dev->io.IOAddrLines = 3;
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  /* Interrupt setup */
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  p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
4480 4481
  p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID;
  p_dev->irq.Handler = wavelan_interrupt;
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  /* General socket configuration */
4484 4485
  p_dev->conf.Attributes = CONF_ENABLE_IRQ;
  p_dev->conf.IntType = INT_MEMORY_AND_IO;
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  /* Allocate the generic data structure */
  dev = alloc_etherdev(sizeof(net_local));
4489
  if (!dev)
4490
      return -ENOMEM;
4491 4492

  p_dev->priv = p_dev->irq.Instance = dev;
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  lp = netdev_priv(dev);

  /* 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->dev = dev;

  /* wavelan NET3 callbacks */
4512
  dev->netdev_ops = &wavelan_netdev_ops;
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  dev->watchdog_timeo	= WATCHDOG_JIFFIES;
  SET_ETHTOOL_OPS(dev, &ops);

  dev->wireless_handlers = &wavelan_handler_def;
  lp->wireless_data.spy_data = &lp->spy_data;
  dev->wireless_data = &lp->wireless_data;

  /* Other specific data */
  dev->mtu = WAVELAN_MTU;

4523 4524 4525 4526 4527 4528
  ret = wv_pcmcia_config(p_dev);
  if (ret)
	  return ret;

  ret = wv_hw_config(dev);
  if (ret) {
4529
	  dev->irq = 0;
4530 4531 4532 4533 4534
	  pcmcia_disable_device(p_dev);
	  return ret;
  }

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

4540
  return 0;
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}

/*------------------------------------------------------------------*/
/*
 * 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
4551
wavelan_detach(struct pcmcia_device *link)
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{
#ifdef DEBUG_CALLBACK_TRACE
  printk(KERN_DEBUG "-> wavelan_detach(0x%p)\n", link);
#endif

4557 4558
  /* Some others haven't done their job : give them another chance */
  wv_pcmcia_release(link);
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  /* Free pieces */
  if(link->priv)
    {
      struct net_device *	dev = (struct net_device *) link->priv;

      /* Remove ourselves from the kernel list of ethernet devices */
      /* Warning : can't be called from interrupt, timer or wavelan_close() */
4567
      if (link->dev_node)
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	unregister_netdev(dev);
4569
      link->dev_node = NULL;
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      ((net_local *)netdev_priv(dev))->link = NULL;
      ((net_local *)netdev_priv(dev))->dev = NULL;
      free_netdev(dev);
    }

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

4580
static int wavelan_suspend(struct pcmcia_device *link)
4581 4582 4583 4584 4585 4586 4587 4588 4589 4590 4591 4592
{
	struct net_device *	dev = (struct net_device *) link->priv;

	/* 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);

4593
	if (link->open)
4594 4595
		netif_device_detach(dev);

4596 4597 4598 4599 4600 4601
	/* Power down the module */
	hacr_write(dev->base_addr, HACR_DEFAULT & (~HACR_PWR_STAT));

	return 0;
}

4602
static int wavelan_resume(struct pcmcia_device *link)
4603 4604 4605
{
	struct net_device *	dev = (struct net_device *) link->priv;

4606
	if (link->open) {
4607 4608
		wv_hw_reset(dev);
		netif_device_attach(dev);
4609 4610 4611 4612 4613 4614
	}

	return 0;
}


4615 4616 4617 4618 4619 4620 4621 4622 4623
static struct pcmcia_device_id wavelan_ids[] = {
	PCMCIA_DEVICE_PROD_ID12("AT&T","WaveLAN/PCMCIA", 0xe7c5affd, 0x1bc50975),
	PCMCIA_DEVICE_PROD_ID12("Digital", "RoamAbout/DS", 0x9999ab35, 0x00d05e06),
	PCMCIA_DEVICE_PROD_ID12("Lucent Technologies", "WaveLAN/PCMCIA", 0x23eb9949, 0x1bc50975),
	PCMCIA_DEVICE_PROD_ID12("NCR", "WaveLAN/PCMCIA", 0x24358cd4, 0x1bc50975),
	PCMCIA_DEVICE_NULL,
};
MODULE_DEVICE_TABLE(pcmcia, wavelan_ids);

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static struct pcmcia_driver wavelan_driver = {
	.owner		= THIS_MODULE,
	.drv		= {
		.name	= "wavelan_cs",
	},
4629
	.probe		= wavelan_probe,
4630
	.remove		= wavelan_detach,
4631
	.id_table       = wavelan_ids,
4632 4633
	.suspend	= wavelan_suspend,
	.resume		= wavelan_resume,
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};

static int __init
init_wavelan_cs(void)
{
	return pcmcia_register_driver(&wavelan_driver);
}

static void __exit
exit_wavelan_cs(void)
{
	pcmcia_unregister_driver(&wavelan_driver);
}

module_init(init_wavelan_cs);
module_exit(exit_wavelan_cs);