Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 4914 insertions, 0 deletions

diff --git a/drivers/net/wireless/wavelan_cs.c b/drivers/net/wireless/wavelan_cs.c
new file mode 100644
index 00000000000..ec8329788e4
--- /dev/null
+++ b/drivers/net/wireless/wavelan_cs.c
@@ -0,0 +1,4914 @@
+/*
+ *	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 */
+
+/************************* MISC SUBROUTINES **************************/
+/*
+ * Subroutines which won't fit in one of the following category
+ * (wavelan modem or i82593)
+ */
+
+#ifdef STRUCT_CHECK
+/*------------------------------------------------------------------*/
+/*
+ * Sanity routine to verify the sizes of the various WaveLAN interface
+ * structures.
+ */
+static char *
+wv_structuct_check(void)
+{
+#define	SC(t,s,n)	if (sizeof(t) != s) return(n);
+
+  SC(psa_t, PSA_SIZE, "psa_t");
+  SC(mmw_t, MMW_SIZE, "mmw_t");
+  SC(mmr_t, MMR_SIZE, "mmr_t");
+
+#undef	SC
+
+  return((char *) NULL);
+} /* wv_structuct_check */
+#endif	/* STRUCT_CHECK */
+
+/******************* MODEM MANAGEMENT SUBROUTINES *******************/
+/*
+ * Useful subroutines to manage the modem of the wavelan
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Read from card's Host Adaptor Status Register.
+ */
+static inline u_char
+hasr_read(u_long	base)
+{
+  return(inb(HASR(base)));
+} /* hasr_read */
+
+/*------------------------------------------------------------------*/
+/*
+ * Write to card's Host Adapter Command Register.
+ */
+static inline void
+hacr_write(u_long	base,
+	   u_char	hacr)
+{
+  outb(hacr, HACR(base));
+} /* hacr_write */
+
+/*------------------------------------------------------------------*/
+/*
+ * Write to card's Host Adapter Command Register. Include a delay for
+ * those times when it is needed.
+ */
+static inline void
+hacr_write_slow(u_long	base,
+		u_char	hacr)
+{
+  hacr_write(base, hacr);
+  /* delay might only be needed sometimes */
+  mdelay(1);
+} /* hacr_write_slow */
+
+/*------------------------------------------------------------------*/
+/*
+ * Read the Parameter Storage Area from the WaveLAN card's memory
+ */
+static void
+psa_read(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 */
+
+/*------------------------------------------------------------------*/
+/*
+ * Write the Paramter Storage Area to the WaveLAN card's memory
+ */
+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;
+  kio_addr_t	base = dev->base_addr;
+  /* As there seem to have no flag PSA_BUSY as in the ISA model, we are
+   * oblige to verify this address to know when the PSA is ready... */
+  volatile u_char __iomem *verify = lp->mem + PSA_ADDR +
+    (psaoff(0, psa_comp_number) << 1);
+
+  /* Authorize writting to PSA */
+  hacr_write(base, HACR_PWR_STAT | HACR_ROM_WEN);
+
+  while(n-- > 0)
+    {
+      /* write to PSA */
+      writeb(*b++, ptr);
+      ptr += 2;
+
+      /* I don't have the spec, so I don't know what the correct
+       * sequence to write is. This hack seem to work for me... */
+      count = 0;
+      while((readb(verify) != PSA_COMP_PCMCIA_915) && (count++ < 100))
+	mdelay(1);
+    }
+
+  /* Put the host interface back in standard state */
+  hacr_write(base, HACR_DEFAULT);
+} /* psa_write */
+
+#ifdef SET_PSA_CRC
+/*------------------------------------------------------------------*/
+/*
+ * Calculate the PSA CRC
+ * Thanks to Valster, Nico <NVALSTER@wcnd.nl.lucent.com> for the code
+ * NOTE: By specifying a length including the CRC position the
+ * returned value should be zero. (i.e. a correct checksum in the PSA)
+ *
+ * The Windows drivers don't use the CRC, but the AP and the PtP tool
+ * depend on it.
+ */
+static u_short
+psa_crc(unsigned char *	psa,	/* The PSA */
+	int		size)	/* Number of short for CRC */
+{
+  int		byte_cnt;	/* Loop on the PSA */
+  u_short	crc_bytes = 0;	/* Data in the PSA */
+  int		bit_cnt;	/* Loop on the bits of the short */
+
+  for(byte_cnt = 0; byte_cnt < size; byte_cnt++ )
+    {
+      crc_bytes ^= psa[byte_cnt];	/* Its an xor */
+
+      for(bit_cnt = 1; bit_cnt < 9; bit_cnt++ )
+	{
+	  if(crc_bytes & 0x0001)
+	    crc_bytes = (crc_bytes >> 1) ^ 0xA001;
+	  else
+	    crc_bytes >>= 1 ;
+        }
+    }
+
+  return crc_bytes;
+} /* psa_crc */
+#endif	/* SET_PSA_CRC */
+
+/*------------------------------------------------------------------*/
+/*
+ * update the checksum field in the Wavelan's PSA
+ */
+static void
+update_psa_checksum(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.
+ */
+static inline void
+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 !
+ */
+static inline void
+mmc_write(u_long	base,
+	  u_char	o,
+	  u_char *	b,
+	  int		n)
+{
+  o += n;
+  b += n;
+
+  while(n-- > 0 )
+    mmc_out(base, --o, *(--b));
+} /* mmc_write */
+
+/*------------------------------------------------------------------*/
+/*
+ * Read 1 byte from the MMC.
+ * Optimised version for 1 byte, avoid using memory...
+ */
+static inline u_char
+mmc_in(u_long	base,
+       u_short	o)
+{
+  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 !
+ */
+static inline void
+mmc_read(u_long		base,
+	 u_char		o,
+	 u_char *	b,
+	 int		n)
+{
+  o += n;
+  b += n;
+
+  while(n-- > 0)
+    *(--b) = mmc_in(base, --o);
+} /* mmc_read */
+
+/*------------------------------------------------------------------*/
+/*
+ * Get the type of encryption available...
+ */
+static inline int
+mmc_encr(u_long		base)	/* i/o port of the card */
+{
+  int	temp;
+
+  temp = mmc_in(base, mmroff(0, mmr_des_avail));
+  if((temp != MMR_DES_AVAIL_DES) && (temp != MMR_DES_AVAIL_AES))
+    return 0;
+  else
+    return temp;
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Wait for the frequency EEprom to complete a command...
+ * I hope this one will be optimally inlined...
+ */
+static inline void
+fee_wait(u_long		base,	/* i/o port of the card */
+	 int		delay,	/* Base delay to wait for */
+	 int		number)	/* Number of time to wait */
+{
+  int		count = 0;	/* Wait only a limited time */
+
+  while((count++ < number) &&
+	(mmc_in(base, mmroff(0, mmr_fee_status)) & MMR_FEE_STATUS_BUSY))
+    udelay(delay);
+}
+
+/*------------------------------------------------------------------*/
+/*
+ * Read bytes from the Frequency EEprom (frequency select cards).
+ */
+static void
+fee_read(u_long		base,	/* i/o port of the card */
+	 u_short	o,	/* destination offset */
+	 u_short *	b,	/* data buffer */
+	 int		n)	/* number of registers */
+{
+  b += n;		/* Position at the end of the area */
+
+  /* Write the address */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n - 1);
+
+  /* Loop on all buffer */
+  while(n-- > 0)
+    {
+      /* Write the read command */
+      mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_READ);
+
+      /* Wait until EEprom is ready (should be quick !) */
+      fee_wait(base, 10, 100);
+
+      /* Read the value */
+      *--b = ((mmc_in(base, mmroff(0, mmr_fee_data_h)) << 8) |
+	      mmc_in(base, mmroff(0, mmr_fee_data_l)));
+    }
+}
+
+#ifdef WIRELESS_EXT	/* If wireless extension exist in the kernel */
+
+/*------------------------------------------------------------------*/
+/*
+ * Write bytes from the Frequency EEprom (frequency select cards).
+ * This is a bit complicated, because the frequency eeprom has to
+ * be unprotected and the write enabled.
+ * Jean II
+ */
+static void
+fee_write(u_long	base,	/* i/o port of the card */
+	  u_short	o,	/* destination offset */
+	  u_short *	b,	/* data buffer */
+	  int		n)	/* number of registers */
+{
+  b += n;		/* Position at the end of the area */
+
+#ifdef EEPROM_IS_PROTECTED	/* disabled */
+#ifdef DOESNT_SEEM_TO_WORK	/* disabled */
+  /* Ask to read the protected register */
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRREAD);
+
+  fee_wait(base, 10, 100);
+
+  /* Read the protected register */
+  printk("Protected 2 : %02X-%02X\n",
+	 mmc_in(base, mmroff(0, mmr_fee_data_h)),
+	 mmc_in(base, mmroff(0, mmr_fee_data_l)));
+#endif	/* DOESNT_SEEM_TO_WORK */
+
+  /* Enable protected register */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PREN);
+
+  fee_wait(base, 10, 100);
+
+  /* Unprotect area */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n);
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);
+#ifdef DOESNT_SEEM_TO_WORK	/* disabled */
+  /* Or use : */
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRCLEAR);
+#endif	/* DOESNT_SEEM_TO_WORK */
+
+  fee_wait(base, 10, 100);
+#endif	/* EEPROM_IS_PROTECTED */
+
+  /* Write enable */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WREN);
+
+  fee_wait(base, 10, 100);
+
+  /* Write the EEprom address */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), o + n - 1);
+
+  /* Loop on all buffer */
+  while(n-- > 0)
+    {
+      /* Write the value */
+      mmc_out(base, mmwoff(0, mmw_fee_data_h), (*--b) >> 8);
+      mmc_out(base, mmwoff(0, mmw_fee_data_l), *b & 0xFF);
+
+      /* Write the write command */
+      mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WRITE);
+
+      /* Wavelan doc says : wait at least 10 ms for EEBUSY = 0 */
+      mdelay(10);
+      fee_wait(base, 10, 100);
+    }
+
+  /* Write disable */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_DS);
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WDS);
+
+  fee_wait(base, 10, 100);
+
+#ifdef EEPROM_IS_PROTECTED	/* disabled */
+  /* Reprotect EEprom */
+  mmc_out(base, mmwoff(0, mmw_fee_addr), 0x00);
+  mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);
+
+  fee_wait(base, 10, 100);
+#endif	/* EEPROM_IS_PROTECTED */
+}
+#endif	/* WIRELESS_EXT */
+
+/******************* WaveLAN Roaming routines... ********************/
+
+#ifdef WAVELAN_ROAMING	/* Conditional compile, see wavelan_cs.h */
+
+unsigned char WAVELAN_BEACON_ADDRESS[]= {0x09,0x00,0x0e,0x20,0x03,0x00};
+  
+void wv_roam_init(struct net_device *dev)
+{
+  net_local  *lp= 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);
+}
+ 
+void wv_roam_cleanup(struct net_device *dev)
+{
+  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 */
+void wv_nwid_filter(unsigned char mode, net_local *lp)
+{
+  mm_t                  m;
+  unsigned long         flags;
+  
+#ifdef WAVELAN_ROAMING_DEBUG
+  printk(KERN_DEBUG "WaveLAN: NWID promisc %s, device %s\n",(mode==NWID_PROMISC) ? "on" : "off", lp->dev->name);
+#endif
+  
+  /* Disable interrupts & save flags */
+  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 */
+wavepoint_history *wl_roam_check(unsigned short nwid, net_local *lp)
+{
+  wavepoint_history	*ptr=lp->wavepoint_table.head;
+  
+  while(ptr!=NULL){
+    if(ptr->nwid==nwid)
+      return ptr;	
+    ptr=ptr->next;
+  }
+  return NULL;
+}
+
+/* Create a new wavepoint table entry */
+wavepoint_history *wl_new_wavepoint(unsigned short nwid, unsigned char seq, net_local* lp)
+{
+  wavepoint_history *new_wavepoint;
+
+#ifdef WAVELAN_ROAMING_DEBUG	
+  printk(KERN_DEBUG "WaveLAN: New Wavepoint, NWID:%.4X\n",nwid);
+#endif
+  
+  if(lp->wavepoint_table.num_wavepoints==MAX_WAVEPOINTS)
+    return NULL;
+  
+  new_wavepoint=(wavepoint_history *) kmalloc(sizeof(wavepoint_history),GFP_ATOMIC);
+  if(new_wavepoint==NULL)
+    return NULL;
+  
+  new_wavepoint->nwid=nwid;                       /* New WavePoints NWID */
+  new_wavepoint->average_fast=0;                    /* Running Averages..*/
+  new_wavepoint->average_slow=0;
+  new_wavepoint->qualptr=0;                       /* Start of ringbuffer */
+  new_wavepoint->last_seq=seq-1;                /* Last sequence no.seen */
+  memset(new_wavepoint->sigqual,0,WAVEPOINT_HISTORY);/* Empty ringbuffer */
+  
+  new_wavepoint->next=lp->wavepoint_table.head;/* Add to wavepoint table */
+  new_wavepoint->prev=NULL;
+  
+  if(lp->wavepoint_table.head!=NULL)
+    lp->wavepoint_table.head->prev=new_wavepoint;
+  
+  lp->wavepoint_table.head=new_wavepoint;
+  
+  lp->wavepoint_table.num_wavepoints++;     /* no. of visible wavepoints */
+  
+  return new_wavepoint;
+}
+
+/* Remove a wavepoint entry from WavePoint table */
+void wl_del_wavepoint(wavepoint_history *wavepoint, struct net_local *lp)
+{
+  if(wavepoint==NULL)
+    return;
+  
+  if(lp->curr_point==wavepoint)
+    lp->curr_point=NULL;
+  
+  if(wavepoint->prev!=NULL)
+    wavepoint->prev->next=wavepoint->next;
+  
+  if(wavepoint->next!=NULL)
+    wavepoint->next->prev=wavepoint->prev;
+  
+  if(lp->wavepoint_table.head==wavepoint)
+    lp->wavepoint_table.head=wavepoint->next;
+  
+  lp->wavepoint_table.num_wavepoints--;
+  kfree(wavepoint);
+}
+
+/* Timer callback function - checks WavePoint table for stale entries */ 
+void wl_cell_expiry(unsigned long data)
+{
+  net_local *lp=(net_local *)data;
+  wavepoint_history *wavepoint=lp->wavepoint_table.head,*old_point;
+  
+#if WAVELAN_ROAMING_DEBUG > 1
+  printk(KERN_DEBUG "WaveLAN: Wavepoint timeout, dev %s\n",lp->dev->name);
+#endif
+  
+  if(lp->wavepoint_table.locked)
+    {
+#if WAVELAN_ROAMING_DEBUG > 1
+      printk(KERN_DEBUG "WaveLAN: Wavepoint table locked...\n");
+#endif
+      
+      lp->cell_timer.expires=jiffies+1; /* If table in use, come back later */
+      add_timer(&lp->cell_timer);
+      return;
+    }
+  
+  while(wavepoint!=NULL)
+    {
+      if(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 */
+void wl_update_history(wavepoint_history *wavepoint, unsigned char sigqual, unsigned char seq)	
+{
+  int i=0,num_missed=0,ptr=0;
+  int average_fast=0,average_slow=0;
+  
+  num_missed=(seq-wavepoint->last_seq)%WAVEPOINT_HISTORY;/* Have we missed
+							    any beacons? */
+  if(num_missed)
+    for(i=0;i<num_missed;i++)
+      {
+	wavepoint->sigqual[wavepoint->qualptr++]=0; /* If so, enter them as 0's */
+	wavepoint->qualptr %=WAVEPOINT_HISTORY;    /* in the ringbuffer. */
+      }
+  wavepoint->last_seen=jiffies;                 /* Add beacon to history */
+  wavepoint->last_seq=seq;	
+  wavepoint->sigqual[wavepoint->qualptr++]=sigqual;          
+  wavepoint->qualptr %=WAVEPOINT_HISTORY;
+  ptr=(wavepoint->qualptr-WAVEPOINT_FAST_HISTORY+WAVEPOINT_HISTORY)%WAVEPOINT_HISTORY;
+  
+  for(i=0;i<WAVEPOINT_FAST_HISTORY;i++)       /* Update running averages */
+    {
+      average_fast+=wavepoint->sigqual[ptr++];
+      ptr %=WAVEPOINT_HISTORY;
+    }
+  
+  average_slow=average_fast;
+  for(i=WAVEPOINT_FAST_HISTORY;i<WAVEPOINT_HISTORY;i++)
+    {
+      average_slow+=wavepoint->sigqual[ptr++];
+      ptr %=WAVEPOINT_HISTORY;
+    }
+  
+  wavepoint->average_fast=average_fast/WAVEPOINT_FAST_HISTORY;
+  wavepoint->average_slow=average_slow/WAVEPOINT_HISTORY;	
+}
+
+/* Perform a handover to a new WavePoint */
+void wv_roam_handover(wavepoint_history *wavepoint, net_local *lp)
+{
+  kio_addr_t		base = lp->dev->base_addr;
+  mm_t                  m;
+  unsigned long         flags;
+
+  if(wavepoint==lp->curr_point)          /* Sanity check... */
+    {
+      wv_nwid_filter(!NWID_PROMISC,lp);
+      return;
+    }
+  
+#ifdef WAVELAN_ROAMING_DEBUG
+  printk(KERN_DEBUG "WaveLAN: Doing handover to %.4X, dev %s\n",wavepoint->nwid,lp->dev->name);
+#endif
+ 	
+  /* Disable interrupts & save flags */
+  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 */
+static inline void wl_roam_gather(struct net_device *  dev,
+				  u_char *  hdr,   /* Beacon header */
+				  u_char *  stats) /* SNR, Signal quality 
+						      of packet */
+{
+  wavepoint_beacon *beacon= (wavepoint_beacon *)hdr; /* Rcvd. Beacon */
+  unsigned short nwid=ntohs(beacon->nwid);  
+  unsigned short sigqual=stats[2] & MMR_SGNL_QUAL;   /* SNR of beacon */
+  wavepoint_history *wavepoint=NULL;                /* WavePoint table entry */
+  net_local *lp = 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;
+  static wavepoint_beacon beacon_template={0xaa,0xaa,0x03,0x08,0x00,0x0e,0x20,0x03,0x00};
+  
+  if(memcmp(beacon,&beacon_template,9)==0)
+    return 1;
+  else
+    return 0;
+}
+#endif	/* WAVELAN_ROAMING */
+
+/************************ I82593 SUBROUTINES *************************/
+/*
+ * Useful subroutines to manage the Ethernet controller
+ */
+
+/*------------------------------------------------------------------*/
+/*
+ * Routine to synchronously send a command to the i82593 chip. 
+ * Should be called with interrupts disabled.
+ * (called by wv_packet_write(), wv_ru_stop(), wv_ru_start(),
+ *  wv_82593_config() & wv_diag())
+ */
+static int
+wv_82593_cmd(struct net_device *	dev,
+	     char *	str,
+	     int	cmd,
+	     int	result)
+{
+  kio_addr_t	base = dev->base_addr;
+  int		status;
+  int		wait_completed;
+  long		spin;
+
+  /* Spin until the chip finishes executing its current command (if any) */
+  spin = 1000;
+  do
+    {
+      /* Time calibration of the loop */
+      udelay(10);
+
+      /* Read the interrupt register */
+      outb(OP0_NOP | CR0_STATUS_3, LCCR(base));
+      status = inb(LCSR(base));
+    }
+  while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0));
+
+  /* If the interrupt hasn't be posted */
+  if(spin <= 0)
+    {
+#ifdef DEBUG_INTERRUPT_ERROR
+      printk(KERN_INFO "wv_82593_cmd: %s timeout (previous command), status 0x%02x\n",
+	     str, status);
+#endif
+      return(FALSE);
+    }
+
+  /* Issue the command to the controller */
+  outb(cmd, LCCR(base));
+
+  /* If we don't have to check the result of the command
+   * Note : this mean that the irq handler will deal with that */
+  if(result == SR0_NO_RESULT)
+    return(TRUE);
+
+  /* We are waiting for command completion */
+  wait_completed = TRUE;
+
+  /* Busy wait while the LAN controller executes the command. */
+  spin = 1000;
+  do
+    {
+      /* Time calibration of the loop */
+      udelay(10);
+
+      /* Read the interrupt register */
+      outb(CR0_STATUS_0 | OP0_NOP, LCCR(base));
+      status = inb(LCSR(base));
+
+      /* Check if there was an interrupt posted */
+      if((status & SR0_INTERRUPT))
+	{
+	  /* Acknowledge the interrupt */
+	  outb(CR0_INT_ACK | OP0_NOP, LCCR(base));
+
+	  /* Check if interrupt is a command completion */
+	  if(((status & SR0_BOTH_RX_TX) != SR0_BOTH_RX_TX) &&
+	     ((status & SR0_BOTH_RX_TX) != 0x0) &&
+	     !(status & SR0_RECEPTION))
+	    {
+	      /* Signal command completion */
+	      wait_completed = FALSE;
+	    }
+	  else
+	    {
+	      /* Note : Rx interrupts will be handled later, because we can
+	       * handle multiple Rx packets at once */
+#ifdef DEBUG_INTERRUPT_INFO
+	      printk(KERN_INFO "wv_82593_cmd: not our interrupt\n");
+#endif
+	    }
+	}
+    }
+  while(wait_completed && (spin-- > 0));
+
+  /* If the interrupt hasn't be posted */
+  if(wait_completed)
+    {
+#ifdef DEBUG_INTERRUPT_ERROR
+      printk(KERN_INFO "wv_82593_cmd: %s timeout, status 0x%02x\n",
+	     str, status);
+#endif
+      return(FALSE);
+    }
+
+  /* Check the return code returned by the card (see above) against
+   * the expected return code provided by the caller */
+  if((status & SR0_EVENT_MASK) != result)
+    {
+#ifdef DEBUG_INTERRUPT_ERROR
+      printk(KERN_INFO "wv_82593_cmd: %s failed, status = 0x%x\n",
+	     str, status);
+#endif
+      return(FALSE);
+    }
+
+  return(TRUE);
+} /* wv_82593_cmd */
+
+/*------------------------------------------------------------------*/
+/*
+ * This routine does a 593 op-code number 7, and obtains the diagnose
+ * status for the WaveLAN.
+ */
+static inline int
+wv_diag(struct net_device *	dev)
+{
+  int		ret = FALSE;
+
+  if(wv_82593_cmd(dev, "wv_diag(): diagnose",
+		  OP0_DIAGNOSE, SR0_DIAGNOSE_PASSED))
+    ret = TRUE;
+
+#ifdef DEBUG_CONFIG_ERRORS
+  printk(KERN_INFO "wavelan_cs: i82593 Self Test failed!\n");
+#endif
+  return(ret);
+} /* wv_diag */
+
+/*------------------------------------------------------------------*/
+/*
+ * Routine to read len bytes from the i82593's ring buffer, starting at
+ * chip address addr. The results read from the chip are stored in buf.
+ * The return value is the address to use for next the call.
+ */
+static int
+read_ringbuf(struct net_device *	dev,
+	     int	addr,
+	     char *	buf,
+	     int	len)
+{
+  kio_addr_t	base = dev->base_addr;
+  int		ring_ptr = addr;
+  int		chunk_len;
+  char *	buf_ptr = buf;
+
+  /* Get all the buffer */
+  while(len > 0)
+    {
+      /* Position the Program I/O Register at the ring buffer pointer */
+      outb(ring_ptr & 0xff, PIORL(base));
+      outb(((ring_ptr >> 8) & PIORH_MASK), PIORH(base));
+
+      /* First, determine how much we can read without wrapping around the
+	 ring buffer */
+      if((addr + len) < (RX_BASE + RX_SIZE))
+	chunk_len = len;
+      else
+	chunk_len = RX_BASE + RX_SIZE - addr;
+      insb(PIOP(base), buf_ptr, chunk_len);
+      buf_ptr += chunk_len;
+      len -= chunk_len;
+      ring_ptr = (ring_ptr - RX_BASE + chunk_len) % RX_SIZE + RX_BASE;
+    }
+  return(ring_ptr);
+} /* read_ringbuf */
+
+/*------------------------------------------------------------------*/
+/*
+ * Reconfigure the i82593, or at least ask for it...
+ * Because wv_82593_config use the transmission buffer, we must do it
+ * when we are sure that there is no transmission, so we do it now
+ * or in wavelan_packet_xmit() (I can't find any better place,
+ * wavelan_interrupt is not an option...), so you may experience
+ * some delay sometime...
+ */
+static inline void
+wv_82593_reconfig(struct net_device *	dev)
+{
+  net_local *		lp = netdev_priv(dev);
+  dev_link_t *		link = lp->link;
+  unsigned long		flags;
+
+  /* Arm the flag, will be cleard in wv_82593_config() */
+  lp->reconfig_82593 = TRUE;
+
+  /* Check if we can do it now ! */
+  if((link->open) && (netif_running(dev)) && !(netif_queue_stopped(dev)))
+    {
+      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
+  printk(KERN_DEBUG "psa_unused0[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X\n",
+	 p->psa_unused0[0],
+	 p->psa_unused0[1],
+	 p->psa_unused0[2],
+	 p->psa_unused0[3],
+	 p->psa_unused0[4],
+	 p->psa_unused0[5],
+	 p->psa_unused0[6]);
+#endif	/* DEBUG_SHOW_UNUSED */
+  printk(KERN_DEBUG "psa_univ_mac_addr[]: %02x:%02x:%02x:%02x:%02x:%02x\n",
+	 p->psa_univ_mac_addr[0],
+	 p->psa_univ_mac_addr[1],
+	 p->psa_univ_mac_addr[2],
+	 p->psa_univ_mac_addr[3],
+	 p->psa_univ_mac_addr[4],
+	 p->psa_univ_mac_addr[5]);
+  printk(KERN_DEBUG "psa_local_mac_addr[]: %02x:%02x:%02x:%02x:%02x:%02x\n",
+	 p->psa_local_mac_addr[0],
+	 p->psa_local_mac_addr[1],
+	 p->psa_local_mac_addr[2],
+	 p->psa_local_mac_addr[3],