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android_kernel_xiaomi_sm8350/drivers/net/wireless/wavelan_cs.p.h
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

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/*
* Wavelan Pcmcia driver
*
* Jean II - HPLB '96
*
* Reorganisation and extension of the driver.
*
* This file contain all definition and declarations necessary for the
* wavelan pcmcia driver. This file is a private header, so it should
* be included only on wavelan_cs.c !!!
*/
#ifndef WAVELAN_CS_P_H
#define WAVELAN_CS_P_H
/************************** DOCUMENTATION **************************/
/*
* This driver provide a Linux interface to the Wavelan Pcmcia hardware
* The Wavelan is a product of Lucent (http://www.wavelan.com/).
* This division was formerly part of NCR and then AT&T.
* Wavelan are also distributed by DEC (RoamAbout DS)...
*
* To know how to use this driver, read the PCMCIA HOWTO.
* If you want to exploit the many other fonctionalities, look comments
* in the code...
*
* This driver is the result of the effort of many peoples (see below).
*/
/* ------------------------ SPECIFIC NOTES ------------------------ */
/*
* Web page
* --------
* I try to maintain a web page with the Wireless LAN Howto at :
* http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Wavelan.html
*
* SMP
* ---
* We now are SMP compliant (I eventually fixed the remaining bugs).
* The driver has been tested on a dual P6-150 and survived my usual
* set of torture tests.
* Anyway, I spent enough time chasing interrupt re-entrancy during
* errors or reconfigure, and I designed the locked/unlocked sections
* of the driver with great care, and with the recent addition of
* the spinlock (thanks to the new API), we should be quite close to
* the truth.
* The SMP/IRQ locking is quite coarse and conservative (i.e. not fast),
* but better safe than sorry (especially at 2 Mb/s ;-).
*
* I have also looked into disabling only our interrupt on the card
* (via HACR) instead of all interrupts in the processor (via cli),
* so that other driver are not impacted, and it look like it's
* possible, but it's very tricky to do right (full of races). As
* the gain would be mostly for SMP systems, it can wait...
*
* Debugging and options
* ---------------------
* You will find below a set of '#define" allowing a very fine control
* on the driver behaviour and the debug messages printed.
* The main options are :
* o WAVELAN_ROAMING, for the experimental roaming support.
* o SET_PSA_CRC, to have your card correctly recognised by
* an access point and the Point-to-Point diagnostic tool.
* o USE_PSA_CONFIG, to read configuration from the PSA (EEprom)
* (otherwise we always start afresh with some defaults)
*
* wavelan_cs.o is darn too big
* -------------------------
* That's true ! There is a very simple way to reduce the driver
* object by 33% (yes !). Comment out the following line :
* #include <linux/wireless.h>
* Other compile options can also reduce the size of it...
*
* MAC address and hardware detection :
* ----------------------------------
* The detection code of the wavelan chech that the first 3
* octets of the MAC address fit the company code. This type of
* detection work well for AT&T cards (because the AT&T code is
* hardcoded in wavelan_cs.h), but of course will fail for other
* manufacturer.
*
* If you are sure that your card is derived from the wavelan,
* here is the way to configure it :
* 1) Get your MAC address
* a) With your card utilities (wfreqsel, instconf, ...)
* b) With the driver :
* o compile the kernel with DEBUG_CONFIG_INFO enabled
* o Boot and look the card messages
* 2) Set your MAC code (3 octets) in MAC_ADDRESSES[][3] (wavelan_cs.h)
* 3) Compile & verify
* 4) Send me the MAC code - I will include it in the next version...
*
*/
/* --------------------- WIRELESS EXTENSIONS --------------------- */
/*
* This driver is the first one to support "wireless extensions".
* This set of extensions provide you some way to control the wireless
* caracteristics of the hardware in a standard way and support for
* applications for taking advantage of it (like Mobile IP).
*
* It might be a good idea as well to fetch the wireless tools to
* configure the device and play a bit.
*/
/* ---------------------------- FILES ---------------------------- */
/*
* wavelan_cs.c : The actual code for the driver - C functions
*
* wavelan_cs.p.h : Private header : local types / vars for the driver
*
* wavelan_cs.h : Description of the hardware interface & structs
*
* i82593.h : Description if the Ethernet controller
*/
/* --------------------------- HISTORY --------------------------- */
/*
* The history of the Wavelan drivers is as complicated as history of
* the Wavelan itself (NCR -> AT&T -> Lucent).
*
* All started with Anders Klemets <klemets@paul.rutgers.edu>,
* writting a Wavelan ISA driver for the MACH microkernel. Girish
* Welling <welling@paul.rutgers.edu> had also worked on it.
* Keith Moore modify this for the Pcmcia hardware.
*
* Robert Morris <rtm@das.harvard.edu> port these two drivers to BSDI
* and add specific Pcmcia support (there is currently no equivalent
* of the PCMCIA package under BSD...).
*
* Jim Binkley <jrb@cs.pdx.edu> port both BSDI drivers to FreeBSD.
*
* Bruce Janson <bruce@cs.usyd.edu.au> port the BSDI ISA driver to Linux.
*
* Anthony D. Joseph <adj@lcs.mit.edu> started modify Bruce driver
* (with help of the BSDI PCMCIA driver) for PCMCIA.
* Yunzhou Li <yunzhou@strat.iol.unh.edu> finished is work.
* Joe Finney <joe@comp.lancs.ac.uk> patched the driver to start
* correctly 2.00 cards (2.4 GHz with frequency selection).
* David Hinds <dahinds@users.sourceforge.net> integrated the whole in his
* Pcmcia package (+ bug corrections).
*
* I (Jean Tourrilhes - jt@hplb.hpl.hp.com) then started to make some
* patchs to the Pcmcia driver. After, I added code in the ISA driver
* for Wireless Extensions and full support of frequency selection
* cards. Now, I'm doing the same to the Pcmcia driver + some
* reorganisation.
* Loeke Brederveld <lbrederv@wavelan.com> from Lucent has given me
* much needed informations on the Wavelan hardware.
*/
/* By the way : for the copyright & legal stuff :
* Almost everybody wrote code under GNU or BSD license (or alike),
* and want that their original copyright remain somewhere in the
* code (for myself, I go with the GPL).
* Nobody want to take responsibility for anything, except the fame...
*/
/* --------------------------- CREDITS --------------------------- */
/*
* Credits:
* Special thanks to Jan Hoogendoorn of AT&T GIS Utrecht and
* Loeke Brederveld of Lucent for providing extremely useful
* information about WaveLAN PCMCIA hardware
*
* This driver is based upon several other drivers, in particular:
* David Hinds' Linux driver for the PCMCIA 3c589 ethernet adapter
* Bruce Janson's Linux driver for the AT-bus WaveLAN adapter
* Anders Klemets' PCMCIA WaveLAN adapter driver
* Robert Morris' BSDI driver for the PCMCIA WaveLAN adapter
*
* Additional Credits:
*
* This software was originally developed under Linux 1.2.3
* (Slackware 2.0 distribution).
* And then under Linux 2.0.x (Debian 1.1 -> 2.2 - pcmcia 2.8.18+)
* with an HP OmniBook 4000 and then a 5500.
*
* It is based on other device drivers and information either written
* or supplied by:
* James Ashton (jaa101@syseng.anu.edu.au),
* Ajay Bakre (bakre@paul.rutgers.edu),
* Donald Becker (becker@super.org),
* Jim Binkley <jrb@cs.pdx.edu>,
* Loeke Brederveld <lbrederv@wavelan.com>,
* Allan Creighton (allanc@cs.su.oz.au),
* Brent Elphick <belphick@uwaterloo.ca>,
* Joe Finney <joe@comp.lancs.ac.uk>,
* Matthew Geier (matthew@cs.su.oz.au),
* Remo di Giovanni (remo@cs.su.oz.au),
* Mark Hagan (mhagan@wtcpost.daytonoh.NCR.COM),
* David Hinds <dahinds@users.sourceforge.net>,
* Jan Hoogendoorn (c/o marteijn@lucent.com),
* Bruce Janson <bruce@cs.usyd.edu.au>,
* Anthony D. Joseph <adj@lcs.mit.edu>,
* Anders Klemets (klemets@paul.rutgers.edu),
* Yunzhou Li <yunzhou@strat.iol.unh.edu>,
* Marc Meertens (mmeertens@lucent.com),
* Keith Moore,
* Robert Morris (rtm@das.harvard.edu),
* Ian Parkin (ian@cs.su.oz.au),
* John Rosenberg (johnr@cs.su.oz.au),
* George Rossi (george@phm.gov.au),
* Arthur Scott (arthur@cs.su.oz.au),
* Stanislav Sinyagin <stas@isf.ru>
* Peter Storey,
* Jean Tourrilhes <jt@hpl.hp.com>,
* Girish Welling (welling@paul.rutgers.edu)
* Clark Woodworth <clark@hiway1.exit109.com>
* Yongguang Zhang <ygz@isl.hrl.hac.com>...
*/
/* ------------------------- IMPROVEMENTS ------------------------- */
/*
* I proudly present :
*
* Changes made in 2.8.22 :
* ----------------------
* - improved wv_set_multicast_list
* - catch spurious interrupt
* - correct release of the device
*
* Changes mades in release :
* ------------------------
* - Reorganisation of the code, function name change
* - Creation of private header (wavelan_cs.h)
* - Reorganised debug messages
* - More comments, history, ...
* - Configure earlier (in "insert" instead of "open")
* and do things only once
* - mmc_init : configure the PSA if not done
* - mmc_init : 2.00 detection better code for 2.00 init
* - better info at startup
* - Correct a HUGE bug (volatile & uncalibrated busy loop)
* in wv_82593_cmd => config speedup
* - Stop receiving & power down on close (and power up on open)
* use "ifconfig down" & "ifconfig up ; route add -net ..."
* - Send packets : add watchdog instead of pooling
* - Receive : check frame wrap around & try to recover some frames
* - wavelan_set_multicast_list : avoid reset
* - add wireless extensions (ioctl & get_wireless_stats)
* get/set nwid/frequency on fly, info for /proc/net/wireless
* - Suppress useless stuff from lp (net_local), but add link
* - More inlines
* - Lot of others minor details & cleanups
*
* Changes made in second release :
* ------------------------------
* - Optimise wv_85893_reconfig stuff, fix potential problems
* - Change error values for ioctl
* - Non blocking wv_ru_stop() + call wv_reset() in case of problems
* - Remove development printk from wavelan_watchdog()
* - Remove of the watchdog to wavelan_close instead of wavelan_release
* fix potential problems...
* - Start debugging suspend stuff (but it's still a bit weird)
* - Debug & optimize dump header/packet in Rx & Tx (debug)
* - Use "readb" and "writeb" to be kernel 2.1 compliant
* - Better handling of bogus interrupts
* - Wireless extension : SETSPY and GETSPY
* - Remove old stuff (stats - for those needing it, just ask me...)
* - Make wireless extensions optional
*
* Changes made in third release :
* -----------------------------
* - cleanups & typos
* - modif wireless ext (spy -> only one pointer)
* - new private ioctl to set/get quality & level threshold
* - Init : correct default value of level threshold for pcmcia
* - kill watchdog in hw_reset
* - more 2.1 support (copy_to/from_user instead of memcpy_to/fromfs)
* - Add message level (debug stuff in /var/adm/debug & errors not
* displayed at console and still in /var/adm/messages)
*
* Changes made in fourth release :
* ------------------------------
* - multicast support (yes !) thanks to Yongguang Zhang.
*
* Changes made in fifth release (2.9.0) :
* -------------------------------------
* - 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 <jseger@MIT.EDU> & David Hinds :
* -----------------------------------------------------------------
* - Roaming "hack" from Joe Finney <joe@comp.lancs.ac.uk>
* - PSA CRC code from Bob Gray <rgray@bald.cs.dartmouth.edu>
* - Better initialisation of the i82593 controller
* from Joseph K. O'Sullivan <josullvn+@cs.cmu.edu>
*
* 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 <shadow@dementia.org>
* - 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 <jcl@gs176.sp.cs.cmu.edu>
* - 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()
*
* Changes made for release in 3.1.33 :
* ----------------------------------
* - Optional use new driver API for Wireless Extensions :
* o got rid of wavelan_ioctl()
* o use a bunch of iw_handler instead
*
* Changes made for release in 3.2.1 :
* ---------------------------------
* - Set dev->trans_start to avoid filling the logs
* (and generating useless abort commands)
* - Avoid deadlocks in mmc_out()/mmc_in()
*
* Wishes & dreams:
* ----------------
* - Cleanup and integrate the roaming code
* (std debug, set DomainID, decay avg and co...)
*/
/***************************** INCLUDES *****************************/
/* Linux headers that we need */
#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 <linux/bitops.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.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>
#include <linux/ethtool.h>
#include <linux/wireless.h> /* Wireless extensions */
#include <net/iw_handler.h> /* New driver API */
/* 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>
/* Wavelan declarations */
#include "i82593.h" /* Definitions for the Intel chip */
#include "wavelan_cs.h" /* Others bits of the hardware */
/************************** DRIVER OPTIONS **************************/
/*
* `#define' or `#undef' the following constant to change the behaviour
* of the driver...
*/
#define WAVELAN_ROAMING /* Include experimental roaming code */
#undef WAVELAN_ROAMING_EXT /* Enable roaming wireless extensions */
#undef SET_PSA_CRC /* Set the CRC in PSA (slower) */
#define USE_PSA_CONFIG /* Use info from the PSA */
#undef STRUCT_CHECK /* Verify padding of structures */
#undef EEPROM_IS_PROTECTED /* Doesn't seem to be necessary */
#define MULTICAST_AVOID /* Avoid extra multicast (I'm sceptical) */
#undef SET_MAC_ADDRESS /* Experimental */
/* Warning : these stuff will slow down the driver... */
#define WIRELESS_SPY /* Enable spying addresses */
#undef HISTOGRAM /* Enable histogram of sig level... */
/****************************** DEBUG ******************************/
#undef DEBUG_MODULE_TRACE /* Module insertion/removal */
#undef DEBUG_CALLBACK_TRACE /* Calls made by Linux */
#undef DEBUG_INTERRUPT_TRACE /* Calls to handler */
#undef DEBUG_INTERRUPT_INFO /* type of interrupt & so on */
#define DEBUG_INTERRUPT_ERROR /* problems */
#undef DEBUG_CONFIG_TRACE /* Trace the config functions */
#undef DEBUG_CONFIG_INFO /* What's going on... */
#define DEBUG_CONFIG_ERRORS /* Errors on configuration */
#undef DEBUG_TX_TRACE /* Transmission calls */
#undef DEBUG_TX_INFO /* Header of the transmitted packet */
#undef DEBUG_TX_FAIL /* Normal failure conditions */
#define DEBUG_TX_ERROR /* Unexpected conditions */
#undef DEBUG_RX_TRACE /* Transmission calls */
#undef DEBUG_RX_INFO /* Header of the transmitted packet */
#undef DEBUG_RX_FAIL /* Normal failure conditions */
#define DEBUG_RX_ERROR /* Unexpected conditions */
#undef DEBUG_PACKET_DUMP /* Dump packet on the screen */
#undef DEBUG_IOCTL_TRACE /* Misc call by Linux */
#undef DEBUG_IOCTL_INFO /* Various debug info */
#define DEBUG_IOCTL_ERROR /* What's going wrong */
#define DEBUG_BASIC_SHOW /* Show basic startup info */
#undef DEBUG_VERSION_SHOW /* Print version info */
#undef DEBUG_PSA_SHOW /* Dump psa to screen */
#undef DEBUG_MMC_SHOW /* Dump mmc to screen */
#undef DEBUG_SHOW_UNUSED /* Show also unused fields */
#undef DEBUG_I82593_SHOW /* Show i82593 status */
#undef DEBUG_DEVICE_SHOW /* Show device parameters */
/************************ CONSTANTS & MACROS ************************/
#ifdef DEBUG_VERSION_SHOW
static const char *version = "wavelan_cs.c : v24 (SMP + wireless extensions) 11/1/02\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 ------------------------ */
#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 + 4 /* Set histogram ranges */
#define SIOCGIPHISTO SIOCIWFIRSTPRIV + 5 /* 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 */
seq; /* WavePoint beacon sequence number */
unsigned short domain_id, /* WavePoint Domain ID */
nwid; /* WavePoint NWID */
} wavepoint_beacon;
typedef struct wavepoint_history
{
unsigned short nwid; /* WavePoint's NWID */
int average_slow; /* SNR running average */
int average_fast; /* SNR running average */
unsigned char sigqual[WAVEPOINT_HISTORY]; /* Ringbuffer of recent SNR's */
unsigned char qualptr; /* Index into ringbuffer */
unsigned char last_seq; /* Last seq. no seen for WavePoint */
struct wavepoint_history *next; /* Next WavePoint in table */
struct wavepoint_history *prev; /* Previous WavePoint in table */
unsigned long last_seen; /* Time of last beacon recvd, jiffies */
} wavepoint_history;
struct wavepoint_table
{
wavepoint_history *head; /* Start of ringbuffer */
int num_wavepoints; /* No. of WavePoints visible */
unsigned char locked; /* Table lock */
};
#endif /* WAVELAN_ROAMING */
/****************************** TYPES ******************************/
/* Shortcuts */
typedef struct net_device_stats en_stats;
typedef struct iw_statistics iw_stats;
typedef struct iw_quality iw_qual;
typedef struct iw_freq iw_freq;
typedef struct net_local net_local;
typedef struct timer_list timer_list;
/* Basic types */
typedef u_char mac_addr[WAVELAN_ADDR_SIZE]; /* Hardware address */
/*
* Static specific data for the interface.
*
* For each network interface, Linux keep data in two structure. "device"
* keep the generic data (same format for everybody) and "net_local" keep
* the additional specific data.
* Note that some of this specific data is in fact generic (en_stats, for
* example).
*/
struct net_local
{
dev_node_t node; /* ???? What is this stuff ???? */
struct net_device * dev; /* Reverse link... */
spinlock_t spinlock; /* Serialize access to the hardware (SMP) */
struct pcmcia_device * link; /* pcmcia structure */
en_stats stats; /* Ethernet interface statistics */
int nresets; /* Number of hw resets */
u_char configured; /* If it is configured */
u_char reconfig_82593; /* Need to reconfigure the controller */
u_char promiscuous; /* Promiscuous mode */
u_char allmulticast; /* All Multicast mode */
int mc_count; /* Number of multicast addresses */
int stop; /* Current i82593 Stop Hit Register */
int rfp; /* Last DMA machine receive pointer */
int overrunning; /* Receiver overrun flag */
iw_stats wstats; /* Wireless specific stats */
struct iw_spy_data spy_data;
struct iw_public_data wireless_data;
#ifdef HISTOGRAM
int his_number; /* Number of intervals */
u_char his_range[16]; /* Boundaries of interval ]n-1; n] */
u_long his_sum[16]; /* Sum in interval */
#endif /* HISTOGRAM */
#ifdef WAVELAN_ROAMING
u_long domain_id; /* Domain ID we lock on for roaming */
int filter_domains; /* Check Domain ID of beacon found */
struct wavepoint_table wavepoint_table; /* Table of visible WavePoints*/
wavepoint_history * curr_point; /* Current wavepoint */
int cell_search; /* Searching for new cell? */
struct timer_list cell_timer; /* Garbage collection */
#endif /* WAVELAN_ROAMING */
void __iomem *mem;
};
/* ----------------- MODEM MANAGEMENT SUBROUTINES ----------------- */
static inline u_char /* data */
hasr_read(u_long); /* Read the host interface : base address */
static inline void
hacr_write(u_long, /* Write to host interface : base address */
u_char), /* data */
hacr_write_slow(u_long,
u_char);
static void
psa_read(struct net_device *, /* Read the Parameter Storage Area */
int, /* offset in PSA */
u_char *, /* buffer to fill */
int), /* size to read */
psa_write(struct net_device *, /* Write to the PSA */
int, /* Offset in psa */
u_char *, /* Buffer in memory */
int); /* Length of buffer */
static inline void
mmc_out(u_long, /* Write 1 byte to the Modem Manag Control */
u_short,
u_char),
mmc_write(u_long, /* Write n bytes to the MMC */
u_char,
u_char *,
int);
static inline u_char /* Read 1 byte from the MMC */
mmc_in(u_long,
u_short);
static inline void
mmc_read(u_long, /* Read n bytes from the MMC */
u_char,
u_char *,
int),
fee_wait(u_long, /* Wait for frequency EEprom : base address */
int, /* Base delay to wait for */
int); /* Number of time to wait */
static void
fee_read(u_long, /* Read the frequency EEprom : base address */
u_short, /* destination offset */
u_short *, /* data buffer */
int); /* number of registers */
/* ---------------------- I82593 SUBROUTINES ----------------------- */
static int
wv_82593_cmd(struct net_device *, /* synchronously send a command to i82593 */
char *,
int,
int);
static inline int
wv_diag(struct net_device *); /* Diagnostique the i82593 */
static int
read_ringbuf(struct net_device *, /* Read a receive buffer */
int,
char *,
int);
static inline void
wv_82593_reconfig(struct net_device *); /* Reconfigure the controller */
/* ------------------- DEBUG & INFO SUBROUTINES ------------------- */
static inline void
wv_init_info(struct net_device *); /* display startup info */
/* ------------------- IOCTL, STATS & RECONFIG ------------------- */
static en_stats *
wavelan_get_stats(struct net_device *); /* Give stats /proc/net/dev */
static iw_stats *
wavelan_get_wireless_stats(struct net_device *);
/* ----------------------- PACKET RECEPTION ----------------------- */
static inline int
wv_start_of_frame(struct net_device *, /* Seek beggining of current frame */
int, /* end of frame */
int); /* start of buffer */
static inline void
wv_packet_read(struct net_device *, /* Read a packet from a frame */
int,
int),
wv_packet_rcv(struct net_device *); /* Read all packets waiting */
/* --------------------- PACKET TRANSMISSION --------------------- */
static inline void
wv_packet_write(struct net_device *, /* Write a packet to the Tx buffer */
void *,
short);
static int
wavelan_packet_xmit(struct sk_buff *, /* Send a packet */
struct net_device *);
/* -------------------- HARDWARE CONFIGURATION -------------------- */
static inline int
wv_mmc_init(struct net_device *); /* Initialize the modem */
static int
wv_ru_stop(struct net_device *), /* Stop the i82593 receiver unit */
wv_ru_start(struct net_device *); /* Start the i82593 receiver unit */
static int
wv_82593_config(struct net_device *); /* Configure the i82593 */
static inline int
wv_pcmcia_reset(struct net_device *); /* Reset the pcmcia interface */
static int
wv_hw_config(struct net_device *); /* Reset & configure the whole hardware */
static inline void
wv_hw_reset(struct net_device *); /* Same, + start receiver unit */
static inline int
wv_pcmcia_config(struct pcmcia_device *); /* Configure the pcmcia interface */
static void
wv_pcmcia_release(struct pcmcia_device *);/* Remove a device */
/* ---------------------- INTERRUPT HANDLING ---------------------- */
static irqreturn_t
wavelan_interrupt(int, /* Interrupt handler */
void *);
static void
wavelan_watchdog(struct net_device *); /* Transmission watchdog */
/* ------------------- CONFIGURATION CALLBACKS ------------------- */
static int
wavelan_open(struct net_device *), /* Open the device */
wavelan_close(struct net_device *); /* Close the device */
static void
wavelan_detach(struct pcmcia_device *p_dev); /* Destroy a removed device */
/**************************** VARIABLES ****************************/
/*
* Parameters that can be set with 'insmod'
* The exact syntax is 'insmod wavelan_cs.o <var>=<value>'
*/
/* Shared memory speed, in ns */
static int mem_speed = 0;
/* New module interface */
module_param(mem_speed, int, 0);
#ifdef WAVELAN_ROAMING /* Conditional compile, see above in options */
/* Enable roaming mode ? No ! Please keep this to 0 */
static int do_roaming = 0;
module_param(do_roaming, bool, 0);
#endif /* WAVELAN_ROAMING */
MODULE_LICENSE("GPL");
#endif /* WAVELAN_CS_P_H */
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