/* * 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 DS) and Digital Ocean. * * 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 ------------------------ */ /* * 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 *should* be SMP compliant. * I don't have a SMP box to verify that (my Pentium 90 is not), so * someone has to certify that from me. * 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 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.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 * Other compile options can also reduce the size of it... * * 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. * */ /* --------------------- 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 * writing a WaveLAN ISA driver for the Mach microkernel. Girish * Welling had also worked on it. * Keith Moore modified this for the PCMCIA hardware. * * Robert Morris ported these two drivers to BSDI * and added specific PCMCIA support (there is currently no equivalent * of the PCMCIA package under BSD). * * Jim Binkley ported both BSDI drivers to FreeBSD. * * Bruce Janson ported the BSDI ISA driver to Linux. * * Anthony D. Joseph started to modify Bruce's driver * (with help of the BSDI PCMCIA driver) for PCMCIA. * Yunzhou Li finished this work. * Joe Finney patched the driver to start * 2.00 cards correctly (2.4 GHz with frequency selection). * David Hinds 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 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 , * Donald Becker , * Loeke Brederveld , * Brent Elphick , * Anders Klemets , * Vladimir V. Kolpakov , * Marc Meertens , * Pauline Middelink , * Robert Morris , * Jean Tourrilhes , * Girish Welling , * Clark Woodworth * Yongguang Zhang * * Thanks go also to: * James Ashton , * Alan Cox , * Allan Creighton , * Matthew Geier , * Remo di Giovanni , * Eckhard Grah , * Vipul Gupta , * Mark Hagan , * Tim Nicholson , * Ian Parkin , * John Rosenberg , * George Rossi , * Arthur Scott , * Stanislav Sinyagin * and Peter Storey for their assistance and advice. * * Additional Credits: * * My development has been done initially under Debian 1.1 (Linux 2.0.x) * and now under Debian 2.2, initially with an HP Vectra XP/60, and now * an HP Vectra XP/90. * */ /* ------------------------- 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) * * Other changes (not by me) : * ------------------------- * - Spelling and gramar "rectification". * * Changes made for release in 2.0.37 & 2.2.2 : * ------------------------------------------ * - Correct status in /proc/net/wireless * - Set PSA CRC to make PtP diagnostic tool happy (Bob Gray) * - Module init code don't fail if we found at least one card in * the address list (Karlis Peisenieks) * - Missing parenthesis (Christopher Peterson) * - Correct i82586 configuration parameters * - Encryption initialisation bug (Robert McCormack) * - New mac addresses detected in the probe * - Increase watchdog for busy environments * * Changes made for release in 2.0.38 & 2.2.7 : * ------------------------------------------ * - Correct the reception logic to better report errors and avoid * sending bogus packet up the stack * - Delay RU config to avoid corrupting first received packet * - Change config completion code (to actually check something) * - Avoid reading out of bound in skbuf to transmit * - Rectify a lot of (useless) debugging code * - Change the way to `#ifdef SET_PSA_CRC' * * Changes made for release in 2.2.11 & 2.3.13 : * ------------------------------------------- * - 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 2.2.14 & 2.3.23 : * ------------------------------------------- * - Fix check for root permission (break instead of exit) * - New nwid & encoding setting (Wireless Extension 9) * * Changes made for release in 2.3.49 : * ---------------------------------- * - Indentation reformating (Alan) * - Update to new network API (softnet - 2.3.43) : * o replace dev->tbusy (Alan) * o replace dev->tstart (Alan) * o remove dev->interrupt (Alan) * 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 increase watchdog timeout (kernel is more sensitive) (me) * o verify that all the changes make sense and work (me) * - Fixup a potential gotcha when reconfiguring and thighten a bit * the interactions with Tx queue. * * Wishes & dreams: * ---------------- * - roaming (see Pcmcia driver) */ /***************************** INCLUDES *****************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Wireless extensions */ /* WaveLAN declarations */ #include "i82586.h" #include "wavelan.h" /************************** DRIVER OPTIONS **************************/ /* * `#define' or `#undef' the following constant to change the behaviour * of the driver... */ #undef SET_PSA_CRC /* Calculate and set the CRC on 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 */ #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 /****************************** 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_ERROR /* 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 received packet */ #undef DEBUG_RX_FAIL /* Normal failure conditions */ #define DEBUG_RX_ERROR /* Unexpected conditions */ #undef DEBUG_PACKET_DUMP 32 /* 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. */ /************************ CONSTANTS & MACROS ************************/ #ifdef DEBUG_VERSION_SHOW static const char *version = "wavelan.c : v22 (wireless extensions) 21/02/00\n"; #endif /* Watchdog temporisation */ #define WATCHDOG_JIFFIES (512*HZ/100) /* 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 net_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 */ spinlock_t spinlock; /* Serialize access to the hardware (SMP) */ 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 */ 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 void wv_splhi(net_local *, /* Disable interrupts, lock driver */ unsigned long *); /* flags */ static inline void wv_splx(net_local *, /* Enable interrupts, unlock driver */ unsigned long *); /* 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 int 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(device *); /* 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 }; MODULE_PARM(io, "1-4i"); MODULE_PARM(irq, "1-4i"); #endif /* MODULE */ #endif /* WAVELAN_P_H */