wavelan_cs.h

pcmcia source code

 * -------------------------------------
 *	- Revisited multicast code (it was mostly wrong).
 *	- protect code in wv_82593_reconfig with dev->tbusy (oups !)
 *
 * Changes made in sixth release (2.9.1a) :
 * --------------------------------------
 *	- Change the detection code for multi manufacturer code support
 *	- Correct bug (hang kernel) in init when we were "rejecting" a card 
 *
 * Changes made in seventh release (2.9.1b) :
 * ----------------------------------------
 *	- Update to wireless extensions changes
 *	- Silly bug in card initial configuration (psa_conf_status)
 *
 * Changes made in eigth release :
 * -----------------------------
 *	- Small bug in debug code (probably not the last one...)
 *	- 1.2.13 support (thanks to Clark Woodworth)
 *
 * Changes made for release in 2.9.2b :
 * ----------------------------------
 *	- Level threshold is now a standard wireless extension (version 4 !)
 *	- modules parameters types for kernel > 2.1.17
 *	- updated man page
 *	- Others cleanup from David Hinds
 *
 * Changes made for release in 2.9.5 :
 * ---------------------------------
 *	- byte count stats (courtesy of David Hinds)
 *	- Remove dev_tint stuff (courtesy of David Hinds)
 *	- Others cleanup from David Hinds
 *	- Encryption setting from Brent Elphick (thanks a lot !)
 *	- 'base' to 'u_long' for the Alpha (thanks to Stanislav Sinyagin)
 *
 * Changes made for release in 2.9.6 :
 * ---------------------------------
 *	- fix bug : no longuer disable watchdog in case of bogus interrupt
 *	- increase timeout in config code for picky hardware
 *	- mask unused bits in status (Wireless Extensions)
 *
 * Changes integrated by Justin Seger <[e-mail]> & David Hinds :
 * -----------------------------------------------------------------
 *	- Roaming "hack" from Joe Finney <[e-mail]>
 *	- PSA CRC code from Bob Gray <[e-mail]>
 *	- Better initialisation of the i82593 controller
 *	  from Joseph K. O'Sullivan <[e-mail]>
 *
 * Changes made for release in 3.0.10 :
 * ----------------------------------
 *	- Fix eject "hang" of the driver under 2.2.X :
 *		o create wv_flush_stale_links()
 *		o Rename wavelan_release to wv_pcmcia_release & move up
 *		o move unregister_netdev to wavelan_detach()
 *		o wavelan_release() no longer call wavelan_detach()
 *		o Suppress "release" timer
 *		o Other cleanups & fixes
 *	- New MAC address in the probe
 *	- Reorg PSA_CRC code (endian neutral & cleaner)
 *	- Correct initialisation of the i82593 from Lucent manual
 *	- Put back the watchdog, with larger timeout
 *	- TRANSMIT_NO_CRC is a "normal" error, so recover from it
 *	  from Derrick J Brashear <[e-mail]>
 *	- Better handling of TX and RX normal failure conditions
 *	- #ifdef out all the roaming code
 *	- Add ESSID & "AP current address" ioctl stubs
 *	- General cleanup of the code
 *
 * Changes made for release in 3.0.13 :
 * ----------------------------------
 *	- Re-enable compilation of roaming code by default, but with
 *	  do_roaming = 0
 *	- Nuke `nwid=nwid^ntohs(beacon->domain_id)' in wl_roam_gather
 *	  at the demand of John Carol Langford <[e-mail]>
 *	- Introduced WAVELAN_ROAMING_EXT for incomplete ESSID stuff.
 *
 * Changes made for release in 3.0.15 :
 * ----------------------------------
 *	- Change e-mail and web page addresses
 *	- Watchdog timer is now correctly expressed in HZ, not in jiffies
 *	- Add channel number to the list of frequencies in range
 *	- Add the (short) list of bit-rates in range
 *	- Developp a new sensitivity... (sens.value & sens.fixed)
 *
 * Changes made for release in 3.1.2 :
 * ---------------------------------
 *	- Fix check for root permission (break instead of exit)
 *	- New nwid & encoding setting (Wireless Extension 9)
 *
 * Changes made for release in 3.1.12 :
 * ----------------------------------
 *	- reworked wv_82593_cmd to avoid using the IRQ handler and doing
 *	  ugly things with interrupts.
 *	- Add IRQ protection in 82593_config/ru_start/ru_stop/watchdog
 *	- Update to new network API (softnet - 2.3.43) :
 *		o replace dev->tbusy (David + me)
 *		o replace dev->tstart (David + me)
 *		o remove dev->interrupt (David)
 *		o add SMP locking via spinlock in splxx (me)
 *		o add spinlock in interrupt handler (me)
 *		o use kernel watchdog instead of ours (me)
 *		o verify that all the changes make sense and work (me)
 *	- Re-sync kernel/pcmcia versions (not much actually)
 *	- A few other cleanups (David & me)...
 *
 * Changes made for release in 3.1.22 :
 * ----------------------------------
 *	- Check that SMP works, remove annoying log message
 *
 * Changes made for release in 3.1.24 :
 * ----------------------------------
 *	- Fix unfrequent card lockup when watchdog was reseting the hardware :
 *		o control first busy loop in wv_82593_cmd()
 *		o Extend spinlock protection in wv_hw_config()
 *
 * Wishes & dreams:
 * ----------------
 *	- Cleanup and integrate the roaming code
 *	  (std debug, set DomainID, decay avg and co...)
 */

/***************************** INCLUDES *****************************/

/* Linux headers that we need */
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/spinlock.h>
#include <linux/in.h>
#include <linux/delay.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/bitops.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/if_arp.h>
#include <linux/ioport.h>
#include <linux/fcntl.h>

#ifdef CONFIG_NET_PCMCIA_RADIO
#include <linux/wireless.h>		/* Wireless extensions */
#endif

/* Pcmcia headers that we need */
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#include <pcmcia/version.h>

/* Wavelan declarations */
#include "i82593.h"	/* Definitions for the Intel chip */

#include "wavelan.h"	/* Others bits of the hardware */

/*********************** KERNEL COMPATIBILITY ***********************/
/* Hyde some uglyness... */

/* These are also useful...
 */
#ifndef HAVE_NETIF_QUEUE
#define devstate(dev)			((dev->tbusy) | (dev->start << 1))
#else	/* 2.3.47 */
#define devstate(dev)			(dev->state)
#endif	/* 2.3.47 */

/************************** DRIVER OPTIONS **************************/
/*
 * `#define' or the following symbols to change the behaviour
 * of the driver...
 */
#define WAVELAN_ROAMING		/* Include experimental roaming code */
//#define WAVELAN_ROAMING_EXT	/* Enable roaming wireless extensions */
//#define SET_PSA_CRC		/* Set the CRC in PSA (slower) */
#define USE_PSA_CONFIG		/* Use info from the PSA */
//#define STRUCT_CHECK		/* Verify padding of structures */
//#define EEPROM_IS_PROTECTED	/* Doesn't seem to be necessary */
#define MULTICAST_AVOID		/* Avoid extra multicast (I'm sceptical) */
//#define SET_MAC_ADDRESS	/* Experimental */

#ifdef WIRELESS_EXT	/* If wireless extension exist in the kernel */
/* Warning : these stuff will slow down the driver... */
#define WIRELESS_SPY		/* Enable spying addresses */
//#define HISTOGRAM		/* Enable histogram of sig level... */
#endif

/****************************** DEBUG ******************************/

//#define DEBUG_MODULE_TRACE	/* Module insertion/removal */
//#define DEBUG_CALLBACK_TRACE	/* Calls made by Linux */
//#define DEBUG_INTERRUPT_TRACE	/* Calls to handler */
//#define DEBUG_INTERRUPT_INFO	/* type of interrupt & so on */
#define DEBUG_INTERRUPT_ERROR	/* problems */
//#define DEBUG_CONFIG_TRACE	/* Trace the config functions */
//#define DEBUG_CONFIG_INFO	/* What's going on... */
#define DEBUG_CONFIG_ERRORS	/* Errors on configuration */
//#define DEBUG_TX_TRACE	/* Transmission calls */
//#define DEBUG_TX_INFO		/* Header of the transmitted packet */
//#define DEBUG_TX_FAIL		/* Normal failure conditions */
#define DEBUG_TX_ERROR		/* Unexpected conditions */
//#define DEBUG_RX_TRACE	/* Transmission calls */
//#define DEBUG_RX_INFO		/* Header of the transmitted packet */
//#define DEBUG_RX_FAIL		/* Normal failure conditions */
#define DEBUG_RX_ERROR		/* Unexpected conditions */
//#define DEBUG_PACKET_DUMP 32	/* Dump packet on the screen */
//#define DEBUG_IOCTL_TRACE	/* Misc call by Linux */
//#define DEBUG_IOCTL_INFO	/* Various debug info */
#define DEBUG_IOCTL_ERROR	/* What's going wrong */
#define DEBUG_BASIC_SHOW	/* Show basic startup info */
//#define DEBUG_VERSION_SHOW	/* Print version info */
//#define DEBUG_PSA_SHOW	/* Dump psa to screen */
//#define DEBUG_MMC_SHOW	/* Dump mmc to screen */
//#define DEBUG_SHOW_UNUSED	/* Show also unused fields */
//#define DEBUG_I82593_SHOW	/* Show i82593 status */
//#define DEBUG_DEVICE_SHOW	/* Show device parameters */

/************************ CONSTANTS & MACROS ************************/

#ifdef DEBUG_VERSION_SHOW
static const char *version = "wavelan_cs.c : v23 (SMP + wireless extensions) 20/12/00\n";
#endif

/* Watchdog temporisation */
#define	WATCHDOG_JIFFIES	(256*HZ/100)

/* Fix a bug in some old wireless extension definitions */
#ifndef IW_ESSID_MAX_SIZE
#define IW_ESSID_MAX_SIZE	32
#endif

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

/* Wireless Extension Backward compatibility - Jean II
 * If the new wireless device private ioctl range is not defined,
 * default to standard device private ioctl range */
#ifndef SIOCIWFIRSTPRIV
#define SIOCIWFIRSTPRIV	SIOCDEVPRIVATE
#endif /* SIOCIWFIRSTPRIV */

#define SIOCSIPQTHR	SIOCIWFIRSTPRIV		/* Set quality threshold */
#define SIOCGIPQTHR	SIOCIWFIRSTPRIV + 1	/* Get quality threshold */
#define SIOCSIPROAM     SIOCIWFIRSTPRIV + 2	/* Set roaming state */
#define SIOCGIPROAM     SIOCIWFIRSTPRIV + 3	/* Get roaming state */

#define SIOCSIPHISTO	SIOCIWFIRSTPRIV + 6	/* Set histogram ranges */
#define SIOCGIPHISTO	SIOCIWFIRSTPRIV + 7	/* Get histogram values */

/*************************** WaveLAN Roaming  **************************/
#ifdef WAVELAN_ROAMING		/* Conditional compile, see above in options */

#define WAVELAN_ROAMING_DEBUG	 0	/* 1 = Trace of handover decisions */
					/* 2 = Info on each beacon rcvd... */
#define MAX_WAVEPOINTS		7	/* Max visible at one time */
#define WAVEPOINT_HISTORY	5	/* SNR sample history slow search */
#define WAVEPOINT_FAST_HISTORY	2	/* SNR sample history fast search */
#define SEARCH_THRESH_LOW	10	/* SNR to enter cell search */
#define SEARCH_THRESH_HIGH	13	/* SNR to leave cell search */
#define WAVELAN_ROAMING_DELTA	1	/* Hysteresis value (+/- SNR) */
#define CELL_TIMEOUT		2*HZ	/* in jiffies */

#define FAST_CELL_SEARCH	1	/* Boolean values... */
#define NWID_PROMISC		1	/* for code clarity. */

typedef struct wavepoint_beacon
{
  unsigned char		dsap,		/* Unused */
			ssap,		/* Unused */
			ctrl,		/* Unused */
			O,U,I,		/* Unused */
			spec_id1,	/* Unused */
			spec_id2,	/* Unused */
			pdu_type,	/* Unused */