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|
/*
* WaveLAN ISA driver
*
* Jean II - HPLB '96
*
* Reorganisation and extension of the driver.
*
* This file contains all definitions and declarations necessary for the
* WaveLAN ISA driver. This file is a private header, so it should
* be included only in wavelan.c!
*/
#ifndef WAVELAN_P_H
#define WAVELAN_P_H
/************************** DOCUMENTATION ***************************/
/*
* This driver provides a Linux interface to the WaveLAN ISA hardware.
* The WaveLAN is a product of Lucent (http://www.wavelan.com/).
* This division was formerly part of NCR and then AT&T.
* WaveLANs are also distributed by DEC (RoamAbout), Digital Ocean and
* Aironet (Arlan). If you have one of those products, you will need to
* make some changes below.
*
* This driver is still beta software. A lot of bugs have been corrected,
* a lot of functionality is implemented, and the whole appears stable,
* but there is still room for improvement (encryption, performance).
*
* To learn how to use this driver, read the NET3 HOWTO.
* If you want to exploit the many other functionalities, read the comments
* in the code.
*
* This driver is the result of the effort of many people (see below).
*/
/* ------------------------ SPECIFIC NOTES ------------------------ */
/*
* wavelan.o is too darned big
* ---------------------------
* That's true! There is a very simple way to reduce the driver
* object by 33%! Comment out the following line:
* #include <linux/wireless.h>
*
* MAC address and hardware detection:
* -----------------------------------
* The detection code for the WaveLAN checks that the first three
* octets of the MAC address fit the company code. This type of
* detection works well for AT&T cards (because the AT&T code is
* hardcoded in wavelan.h), but of course will fail for other
* manufacturers.
*
* 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, etc.)
* 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.h)
* 3) Compile and verify
* 4) Send me the MAC code. I will include it in the next version.
*
* "CU Inactive" message at boot up:
* -----------------------------------
* It seems that there is some weird timing problem with the
* Intel microcontroller. In fact, this message is triggered by a
* bad reading of the onboard RAM the first time we read the
* control block. If you ignore this message, all is OK (but in
* fact, currently, it resets the WaveLAN hardware).
*
* There are two ways to get rid of that problem. The first
* is to add a dummy read of the scb at the end of
* wv_82586_config. The second is to add the timers
* wv_synchronous_cmd and wv_ack (the udelay just after the
* waiting loops--it seems that the controller is not totally ready
* when it says it is).
*
* In the current code, I use the second solution (to be
* consistent with the original solution of Bruce Janson).
*/
/* --------------------- WIRELESS EXTENSIONS --------------------- */
/*
* This driver is the first to support "wireless extensions".
* This set of extensions provides a standard way to control the wireless
* characteristics of the hardware. Applications such as mobile IP may
* take advantage of it.
*
* You will need to enable the CONFIG_NET_RADIO define in the kernel
* configuration to enable the wireless extensions (this is the one
* giving access to the radio network device choice).
*
* It might also be a good idea as well to fetch the wireless tools to
* configure the device and play a bit.
*/
/* ---------------------------- FILES ---------------------------- */
/*
* wavelan.c: actual code for the driver: C functions
*
* wavelan.p.h: private header: local types and variables for driver
*
* wavelan.h: description of the hardware interface and structs
*
* i82586.h: description of the Ethernet controller
*/
/* --------------------------- HISTORY --------------------------- */
/*
* This is based on information in the drivers' headers. It may not be
* accurate, and I guarantee only my best effort.
*
* The history of the WaveLAN drivers is as complicated as the history of
* the WaveLAN itself (NCR -> AT&T -> Lucent).
*
* It all started with Anders Klemets <klemets@paul.rutgers.edu>
* writing a WaveLAN ISA driver for the Mach microkernel. Girish
* Welling <welling@paul.rutgers.edu> had also worked on it.
* Keith Moore modified this for the PCMCIA hardware.
*
* Robert Morris <rtm@das.harvard.edu> ported these two drivers to BSDI
* and added specific PCMCIA support (there is currently no equivalent
* of the PCMCIA package under BSD).
*
* Jim Binkley <jrb@cs.pdx.edu> ported both BSDI drivers to FreeBSD.
*
* Bruce Janson <bruce@cs.usyd.edu.au> ported the BSDI ISA driver to Linux.
*
* Anthony D. Joseph <adj@lcs.mit.edu> started to modify Bruce's driver
* (with help of the BSDI PCMCIA driver) for PCMCIA.
* Yunzhou Li <yunzhou@strat.iol.unh.edu> finished this work.
* Joe Finney <joe@comp.lancs.ac.uk> patched the driver to start
* 2.00 cards correctly (2.4 GHz with frequency selection).
* David Hinds <dhinds@hyper.stanford.edu> integrated the whole in his
* PCMCIA package (and bug corrections).
*
* I (Jean Tourrilhes - jt@hplb.hpl.hp.com) then started to make some
* patches to the PCMCIA driver. Later, I added code in the ISA driver
* for Wireless Extensions and full support of frequency selection
* cards. Then, I did the same to the PCMCIA driver, and did some
* reorganisation. Finally, I came back to the ISA driver to
* upgrade it at the same level as the PCMCIA one and reorganise
* the code.
* Loeke Brederveld <lbrederv@wavelan.com> from Lucent has given me
* much needed information on the WaveLAN hardware.
*/
/* The original copyrights and literature mention others' names and
* credits. I don't know what their part in this development was.
*/
/* By the way, for the copyright and legal stuff:
* almost everybody wrote code under the GNU or BSD license (or similar),
* and want their original copyright to remain somewhere in the
* code (for myself, I go with the GPL).
* Nobody wants to take responsibility for anything, except the fame.
*/
/* --------------------------- CREDITS --------------------------- */
/*
* This software was developed as a component of the
* Linux operating system.
* It is based on other device drivers and information
* either written or supplied by:
* Ajay Bakre <bakre@paul.rutgers.edu>,
* Donald Becker <becker@cesdis.gsfc.nasa.gov>,
* Loeke Brederveld <Loeke.Brederveld@Utrecht.NCR.com>,
* Brent Elphick <belphick@uwaterloo.ca>,
* Anders Klemets <klemets@it.kth.se>,
* Vladimir V. Kolpakov <w@stier.koenig.ru>,
* Marc Meertens <Marc.Meertens@Utrecht.NCR.com>,
* Pauline Middelink <middelin@polyware.iaf.nl>,
* Robert Morris <rtm@das.harvard.edu>,
* Jean Tourrilhes <jt@hplb.hpl.hp.com>,
* Girish Welling <welling@paul.rutgers.edu>,
* Clark Woodworth <clark@hiway1.exit109.com>
* Yongguang Zhang <ygz@isl.hrl.hac.com>
*
* Thanks go also to:
* James Ashton <jaa101@syseng.anu.edu.au>,
* Alan Cox <iialan@iiit.swan.ac.uk>,
* Allan Creighton <allanc@cs.usyd.edu.au>,
* Matthew Geier <matthew@cs.usyd.edu.au>,
* Remo di Giovanni <remo@cs.usyd.edu.au>,
* Eckhard Grah <grah@wrcs1.urz.uni-wuppertal.de>,
* Vipul Gupta <vgupta@cs.binghamton.edu>,
* Mark Hagan <mhagan@wtcpost.daytonoh.NCR.COM>,
* Tim Nicholson <tim@cs.usyd.edu.au>,
* Ian Parkin <ian@cs.usyd.edu.au>,
* John Rosenberg <johnr@cs.usyd.edu.au>,
* George Rossi <george@phm.gov.au>,
* Arthur Scott <arthur@cs.usyd.edu.au>,
* Stanislav Sinyagin <stas@isf.ru>
* and Peter Storey for their assistance and advice.
*
* Additional Credits:
*
* My development has been done under Linux 2.0.x (Debian 1.1) with
* an HP Vectra XP/60.
*
*/
/* ------------------------- IMPROVEMENTS ------------------------- */
/*
* I proudly present:
*
* Changes made in first pre-release:
* ----------------------------------
* - reorganisation of the code, function name change
* - creation of private header (wavelan.p.h)
* - reorganised debug messages
* - more comments, history, etc.
* - mmc_init: configure the PSA if not done
* - mmc_init: correct default value of level threshold for PCMCIA
* - mmc_init: 2.00 detection better code for 2.00 initialization
* - better info at startup
* - IRQ setting (note: this setting is permanent)
* - watchdog: change strategy (and solve module removal problems)
* - add wireless extensions (ioctl and get_wireless_stats)
* get/set nwid/frequency on fly, info for /proc/net/wireless
* - more wireless extensions: SETSPY and GETSPY
* - make wireless extensions optional
* - private ioctl to set/get quality and level threshold, histogram
* - remove /proc/net/wavelan
* - suppress useless stuff from lp (net_local)
* - kernel 2.1 support (copy_to/from_user instead of memcpy_to/fromfs)
* - add message level (debug stuff in /var/adm/debug and errors not
* displayed at console and still in /var/adm/messages)
* - multi device support
* - start fixing the probe (init code)
* - more inlines
* - man page
* - many other minor details and cleanups
*
* Changes made in second pre-release:
* -----------------------------------
* - clean up init code (probe and module init)
* - better multiple device support (module)
* - name assignment (module)
*
* Changes made in third pre-release:
* ----------------------------------
* - be more conservative on timers
* - preliminary support for multicast (I still lack some details)
*
* Changes made in fourth pre-release:
* -----------------------------------
* - multicast (revisited and finished)
* - avoid reset in set_multicast_list (a really big hack)
* if somebody could apply this code for other i82586 based drivers
* - share onboard memory 75% RU and 25% CU (instead of 50/50)
*
* Changes made for release in 2.1.15:
* -----------------------------------
* - change the detection code for multi manufacturer code support
*
* Changes made for release in 2.1.17:
* -----------------------------------
* - update to wireless extensions changes
* - silly bug in card initial configuration (psa_conf_status)
*
* Changes made for release in 2.1.27 & 2.0.30:
* --------------------------------------------
* - small bug in debug code (probably not the last one...)
* - remove extern keyword for wavelan_probe()
* - level threshold is now a standard wireless extension (version 4 !)
* - modules parameters types (new module interface)
*
* Changes made for release in 2.1.36:
* -----------------------------------
* - byte count stats (courtesy of David Hinds)
* - remove dev_tint stuff (courtesy of David Hinds)
* - encryption setting from Brent Elphick (thanks a lot!)
* - 'ioaddr' to 'u_long' for the Alpha (thanks to Stanislav Sinyagin)
*
* Wishes & dreams:
* ----------------
* - roaming
*/
/***************************** INCLUDES *****************************/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/stat.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <asm/system.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/malloc.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/wireless.h> /* Wireless extensions */
/* WaveLAN declarations */
#include "i82586.h"
#include "wavelan.h"
/****************************** 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 and 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 */
#define DEBUG_TX_ERROR /* unexpected conditions */
#undef DEBUG_RX_TRACE /* transmission calls */
#undef DEBUG_RX_INFO /* header of the transmitted packet */
#define DEBUG_RX_ERROR /* unexpected conditions */
#undef DEBUG_PACKET_DUMP 16 /* Dump packet on the screen. */
#undef DEBUG_IOCTL_TRACE /* misc. call by Linux */
#undef DEBUG_IOCTL_INFO /* various debugging 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 unused fields too. */
#undef DEBUG_I82586_SHOW /* Show i82586 status. */
#undef DEBUG_DEVICE_SHOW /* Show device parameters. */
/* Options */
#define USE_PSA_CONFIG /* Use info from the PSA. */
#define IGNORE_NORMAL_XMIT_ERRS /* Don't bother with normal conditions. */
#undef STRUCT_CHECK /* Verify padding of structures. */
#undef PSA_CRC /* Check CRC in PSA. */
#undef OLDIES /* old code (to redo) */
#undef RECORD_SNR /* to redo */
#undef EEPROM_IS_PROTECTED /* doesn't seem to be necessary */
#define MULTICAST_AVOID /* Avoid extra multicast (I'm sceptical). */
#ifdef WIRELESS_EXT /* If wireless extensions exist in the kernel */
/* Warning: this stuff will slow down the driver. */
#define WIRELESS_SPY /* Enable spying addresses. */
#undef HISTOGRAM /* Enable histogram of signal level. */
#endif
/************************ CONSTANTS & MACROS ************************/
#ifdef DEBUG_VERSION_SHOW
static const char *version = "wavelan.c : v16 (wireless extensions) 17/4/97\n";
#endif
/* Watchdog temporisation */
#define WATCHDOG_JIFFIES 32 /* TODO: express in HZ. */
/* Macro to get the number of elements in an array */
#define NELS(a) (sizeof(a) / sizeof(a[0]))
/* ------------------------ PRIVATE IOCTL ------------------------ */
#define SIOCSIPQTHR SIOCDEVPRIVATE /* Set quality threshold */
#define SIOCGIPQTHR SIOCDEVPRIVATE + 1 /* Get quality threshold */
#define SIOCSIPLTHR SIOCDEVPRIVATE + 2 /* Set level threshold */
#define SIOCGIPLTHR SIOCDEVPRIVATE + 3 /* Get level threshold */
#define SIOCSIPHISTO SIOCDEVPRIVATE + 6 /* Set histogram ranges */
#define SIOCGIPHISTO SIOCDEVPRIVATE + 7 /* Get histogram values */
/****************************** TYPES ******************************/
/* Shortcuts */
typedef struct device device;
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 keeps data in two structures: "device"
* keeps the generic data (same format for everybody) and "net_local" keeps
* additional specific data.
* Note that some of this specific data is in fact generic (en_stats, for
* example).
*/
struct net_local
{
net_local * next; /* linked list of the devices */
device * dev; /* reverse link */
en_stats stats; /* Ethernet interface statistics */
int nresets; /* number of hardware resets */
u_char reconfig_82586; /* We need to reconfigure the controller. */
u_char promiscuous; /* promiscuous mode */
int mc_count; /* number of multicast addresses */
timer_list watchdog; /* to avoid blocking state */
u_short hacr; /* current host interface state */
int tx_n_in_use;
u_short rx_head;
u_short rx_last;
u_short tx_first_free;
u_short tx_first_in_use;
#ifdef WIRELESS_EXT
iw_stats wstats; /* Wireless-specific statistics */
#endif
#ifdef WIRELESS_SPY
int spy_number; /* number of addresses to spy */
mac_addr spy_address[IW_MAX_SPY]; /* the addresses to spy */
iw_qual spy_stat[IW_MAX_SPY]; /* statistics gathered */
#endif /* WIRELESS_SPY */
#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 */
};
/**************************** PROTOTYPES ****************************/
/* ----------------------- MISC. SUBROUTINES ------------------------ */
static inline unsigned long /* flags */
wv_splhi(void); /* Disable interrupts */
static inline void
wv_splx(unsigned long); /* Enable interrupts: flags */
static u_char
wv_irq_to_psa(int);
static int
wv_psa_to_irq(u_char);
/* ------------------- HOST ADAPTER SUBROUTINES ------------------- */
static inline u_short /* 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_short), /* data */
hacr_write_slow(u_long,
u_short),
set_chan_attn(u_long, /* ioaddr */
u_short), /* hacr */
wv_hacr_reset(u_long), /* ioaddr */
wv_16_off(u_long, /* ioaddr */
u_short), /* hacr */
wv_16_on(u_long, /* ioaddr */
u_short), /* hacr */
wv_ints_off(device *),
wv_ints_on(device *);
/* ----------------- MODEM MANAGEMENT SUBROUTINES ----------------- */
static void
psa_read(u_long, /* Read the Parameter Storage Area. */
u_short, /* hacr */
int, /* offset in PSA */
u_char *, /* buffer to fill */
int), /* size to read */
psa_write(u_long, /* Write to the PSA. */
u_short, /* hacr */
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); /* 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 */
/* ---------------------- I82586 SUBROUTINES ----------------------- */
static /*inline*/ void
obram_read(u_long, /* ioaddr */
u_short, /* o */
u_char *, /* b */
int); /* n */
static inline void
obram_write(u_long, /* ioaddr */
u_short, /* o */
u_char *, /* b */
int); /* n */
static void
wv_ack(device *);
static inline int
wv_synchronous_cmd(device *,
const char *),
wv_config_complete(device *,
u_long,
net_local *);
static int
wv_complete(device *,
u_long,
net_local *);
static inline void
wv_82586_reconfig(device *);
/* ------------------- DEBUG & INFO SUBROUTINES ------------------- */
#ifdef DEBUG_I82586_SHOW
static void
wv_scb_show(unsigned short);
#endif
static inline void
wv_init_info(device *); /* display startup info */
/* ------------------- IOCTL, STATS & RECONFIG ------------------- */
static en_stats *
wavelan_get_stats(device *); /* Give stats /proc/net/dev */
static void
wavelan_set_multicast_list(device *);
/* ----------------------- PACKET RECEPTION ----------------------- */
static inline void
wv_packet_read(device *, /* Read a packet from a frame. */
u_short,
int),
wv_receive(device *); /* Read all packets waiting. */
/* --------------------- PACKET TRANSMISSION --------------------- */
static inline void
wv_packet_write(device *, /* Write a packet to the Tx buffer. */
void *,
short);
static int
wavelan_packet_xmit(struct sk_buff *, /* Send a packet. */
device *);
/* -------------------- HARDWARE CONFIGURATION -------------------- */
static inline int
wv_mmc_init(device *), /* Initialize the modem. */
wv_ru_start(device *), /* Start the i82586 receiver unit. */
wv_cu_start(device *), /* Start the i82586 command unit. */
wv_82586_start(device *); /* Start the i82586. */
static void
wv_82586_config(device *); /* Configure the i82586. */
static inline void
wv_82586_stop(device *);
static int
wv_hw_reset(device *), /* Reset the WaveLAN hardware. */
wv_check_ioaddr(u_long, /* ioaddr */
u_char *); /* mac address (read) */
/* ---------------------- INTERRUPT HANDLING ---------------------- */
static void
wavelan_interrupt(int, /* interrupt handler */
void *,
struct pt_regs *);
static void
wavelan_watchdog(u_long); /* transmission watchdog */
/* ------------------- CONFIGURATION CALLBACKS ------------------- */
static int
wavelan_open(device *), /* Open the device. */
wavelan_close(device *), /* Close the device. */
wavelan_config(device *); /* Configure one device. */
extern int
wavelan_probe(device *); /* See Space.c. */
/**************************** VARIABLES ****************************/
/*
* This is the root of the linked list of WaveLAN drivers
* It is use to verify that we don't reuse the same base address
* for two different drivers and to clean up when removing the module.
*/
static net_local * wavelan_list = (net_local *) NULL;
/*
* This table is used to translate the PSA value to IRQ number
* and vice versa.
*/
static u_char irqvals[] =
{
0, 0, 0, 0x01,
0x02, 0x04, 0, 0x08,
0, 0, 0x10, 0x20,
0x40, 0, 0, 0x80,
};
/*
* Table of the available I/O addresses (base addresses) for WaveLAN
*/
static unsigned short iobase[] =
{
#if 0
/* Leave out 0x3C0 for now -- seems to clash with some video
* controllers.
* Leave out the others too -- we will always use 0x390 and leave
* 0x300 for the Ethernet device.
* Jean II: 0x3E0 is fine as well.
*/
0x300, 0x390, 0x3E0, 0x3C0
#endif /* 0 */
0x390, 0x3E0
};
#ifdef MODULE
/* Parameters set by insmod */
static int io[4] = { 0, 0, 0, 0 };
static int irq[4] = { 0, 0, 0, 0 };
static char name[4][IFNAMSIZ] = { "", "", "", "" };
MODULE_PARM(io, "1-4i");
MODULE_PARM(irq, "1-4i");
MODULE_PARM(name, "1-4c" __MODULE_STRING(IFNAMSIZ));
#endif /* MODULE */
#endif /* WAVELAN_P_H */
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