/* * 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 */ #ifdef WAVELAN_ROAMING static void wl_cell_expiry(unsigned long data); static void wl_del_wavepoint(wavepoint_history *wavepoint, struct net_local *lp); static void wv_nwid_filter(unsigned char mode, net_local *lp); #endif /* WAVELAN_ROAMING */ /************************* MISC SUBROUTINES **************************/ /* * Subroutines which won't fit in one of the following category * (wavelan modem or i82593) */ /******************* 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 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; unsigned int 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 writing 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 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 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 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 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... */ static 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))); } } /*------------------------------------------------------------------*/ /* * 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 */ } /******************* WaveLAN Roaming routines... ********************/ #ifdef WAVELAN_ROAMING /* Conditional compile, see wavelan_cs.h */ static unsigned char WAVELAN_BEACON_ADDRESS[] = {0x09,0x00,0x0e,0x20,0x03,0x00}; static 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); } static 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 */ static 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 */ static 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 */ static 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 = 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 */ static 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 */ static 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 */ static 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 */ static void wv_roam_handover(wavepoint_history *wavepoint, net_local *lp) { unsigned int 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 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 const 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) { unsigned int 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) { return(wv_82593_cmd(dev, "wv_diag(): diagnose", OP0_DIAGNOSE, SR0_DIAGNOSE_PASSED)); } /* 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) { unsigned int 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 void wv_82593_reconfig(struct net_device * dev) { net_local * lp = netdev_priv(dev); struct pcmcia_device * 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[]: %pM\n", p->psa_unused0); #endif /* DEBUG_SHOW_UNUSED */ printk(KERN_DEBUG "psa_univ_mac_addr[]: %pM\n", p->psa_univ_mac_addr); printk(KERN_DEBUG "psa_local_mac_addr[]: %pM\n", p->psa_local_mac_addr); printk(KERN_DEBUG "psa_univ_local_sel: %d, ", p->psa_univ_local_sel); printk("psa_comp_number: %d, ", p->psa_comp_number); printk("psa_thr_pre_set: 0x%02x\n", p->psa_thr_pre_set); printk(KERN_DEBUG "psa_feature_select/decay_prm: 0x%02x, ", p->psa_feature_select); printk("psa_subband/decay_update_prm: %d\n", p->psa_subband); printk(KERN_DEBUG "psa_quality_thr: 0x%02x, ", p->psa_quality_thr); printk("psa_mod_delay: 0x%02x\n", p->psa_mod_delay); printk(KERN_DEBUG "psa_nwid: 0x%02x%02x, ", p->psa_nwid[0], p->psa_nwid[1]); printk("psa_nwid_select: %d\n", p->psa_nwid_select); printk(KERN_DEBUG "psa_encryption_select: %d, ", p->psa_encryption_select); printk("psa_encryption_key[]: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", p->psa_encryption_key[0], p->psa_encryption_key[1], p->psa_encryption_key[2], p->psa_encryption_key[3], p->psa_encryption_key[4], p->psa_encryption_key[5], p->psa_encryption_key[6], p->psa_encryption_key[7]); printk(KERN_DEBUG "psa_databus_width: %d\n", p->psa_databus_width); printk(KERN_DEBUG "psa_call_code/auto_squelch: 0x%02x, ", p->psa_call_code[0]); printk("psa_call_code[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n", p->psa_call_code[0], p->psa_call_code[1], p->psa_call_code[2], p->psa_call_code[3], p->psa_call_code[4], p->psa_call_code[5], p->psa_call_code[6], p->psa_call_code[7]); #ifdef DEBUG_SHOW_UNUSED printk(KERN_DEBUG "psa_reserved[]: %02X:%02X\n", p->psa_reserved[0], p->psa_reserved[1]); #endif /* DEBUG_SHOW_UNUSED */ printk(KERN_DEBUG "psa_conf_status: %d, ", p->psa_conf_status); printk("psa_crc: 0x%02x%02x, ", p->psa_crc[0], p->psa_crc[1]); printk("psa_crc_status: 0x%02x\n", p->psa_crc_status); } /* wv_psa_show */ #endif /* DEBUG_PSA_SHOW */ #ifdef DEBUG_MMC_SHOW /*------------------------------------------------------------------*/ /* * Print the formatted status of the Modem Management Controller. * This function need to be completed... */ static void wv_mmc_show(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); mmr_t m; /* Basic check */ if(hasr_read(base) & HASR_NO_CLK) { printk(KERN_WARNING "%s: wv_mmc_show: modem not connected\n", dev->name); return; } spin_lock_irqsave(&lp->spinlock, flags); /* Read the mmc */ mmc_out(base, mmwoff(0, mmw_freeze), 1); mmc_read(base, 0, (u_char *)&m, sizeof(m)); mmc_out(base, mmwoff(0, mmw_freeze), 0); /* Don't forget to update statistics */ lp->wstats.discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l; spin_unlock_irqrestore(&lp->spinlock, flags); printk(KERN_DEBUG "##### wavelan modem status registers: #####\n"); #ifdef DEBUG_SHOW_UNUSED printk(KERN_DEBUG "mmc_unused0[]: %02X:%02X:%02X:%02X:%02X:%02X:%02X:%02X\n", m.mmr_unused0[0], m.mmr_unused0[1], m.mmr_unused0[2], m.mmr_unused0[3], m.mmr_unused0[4], m.mmr_unused0[5], m.mmr_unused0[6], m.mmr_unused0[7]); #endif /* DEBUG_SHOW_UNUSED */ printk(KERN_DEBUG "Encryption algorithm: %02X - Status: %02X\n", m.mmr_des_avail, m.mmr_des_status); #ifdef DEBUG_SHOW_UNUSED printk(KERN_DEBUG "mmc_unused1[]: %02X:%02X:%02X:%02X:%02X\n", m.mmr_unused1[0], m.mmr_unused1[1], m.mmr_unused1[2], m.mmr_unused1[3], m.mmr_unused1[4]); #endif /* DEBUG_SHOW_UNUSED */ printk(KERN_DEBUG "dce_status: 0x%x [%s%s%s%s]\n", m.mmr_dce_status, (m.mmr_dce_status & MMR_DCE_STATUS_RX_BUSY) ? "energy detected,":"", (m.mmr_dce_status & MMR_DCE_STATUS_LOOPT_IND) ? "loop test indicated," : "", (m.mmr_dce_status & MMR_DCE_STATUS_TX_BUSY) ? "transmitter on," : "", (m.mmr_dce_status & MMR_DCE_STATUS_JBR_EXPIRED) ? "jabber timer expired," : ""); printk(KERN_DEBUG "Dsp ID: %02X\n", m.mmr_dsp_id); #ifdef DEBUG_SHOW_UNUSED printk(KERN_DEBUG "mmc_unused2[]: %02X:%02X\n", m.mmr_unused2[0], m.mmr_unused2[1]); #endif /* DEBUG_SHOW_UNUSED */ printk(KERN_DEBUG "# correct_nwid: %d, # wrong_nwid: %d\n", (m.mmr_correct_nwid_h << 8) | m.mmr_correct_nwid_l, (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l); printk(KERN_DEBUG "thr_pre_set: 0x%x [current signal %s]\n", m.mmr_thr_pre_set & MMR_THR_PRE_SET, (m.mmr_thr_pre_set & MMR_THR_PRE_SET_CUR) ? "above" : "below"); printk(KERN_DEBUG "signal_lvl: %d [%s], ", m.mmr_signal_lvl & MMR_SIGNAL_LVL, (m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) ? "new msg" : "no new msg"); printk("silence_lvl: %d [%s], ", m.mmr_silence_lvl & MMR_SILENCE_LVL, (m.mmr_silence_lvl & MMR_SILENCE_LVL_VALID) ? "update done" : "no new update"); printk("sgnl_qual: 0x%x [%s]\n", m.mmr_sgnl_qual & MMR_SGNL_QUAL, (m.mmr_sgnl_qual & MMR_SGNL_QUAL_ANT) ? "Antenna 1" : "Antenna 0"); #ifdef DEBUG_SHOW_UNUSED printk(KERN_DEBUG "netw_id_l: %x\n", m.mmr_netw_id_l); #endif /* DEBUG_SHOW_UNUSED */ } /* wv_mmc_show */ #endif /* DEBUG_MMC_SHOW */ #ifdef DEBUG_I82593_SHOW /*------------------------------------------------------------------*/ /* * Print the formatted status of the i82593's receive unit. */ static void wv_ru_show(struct net_device * dev) { net_local *lp = netdev_priv(dev); printk(KERN_DEBUG "##### wavelan i82593 receiver status: #####\n"); printk(KERN_DEBUG "ru: rfp %d stop %d", lp->rfp, lp->stop); /* * Not implemented yet... */ printk("\n"); } /* wv_ru_show */ #endif /* DEBUG_I82593_SHOW */ #ifdef DEBUG_DEVICE_SHOW /*------------------------------------------------------------------*/ /* * Print the formatted status of the WaveLAN PCMCIA device driver. */ static void wv_dev_show(struct net_device * dev) { printk(KERN_DEBUG "dev:"); printk(" state=%lX,", dev->state); printk(" trans_start=%ld,", dev->trans_start); printk(" flags=0x%x,", dev->flags); printk("\n"); } /* wv_dev_show */ /*------------------------------------------------------------------*/ /* * Print the formatted status of the WaveLAN PCMCIA device driver's * private information. */ static void wv_local_show(struct net_device * dev) { net_local *lp = netdev_priv(dev); printk(KERN_DEBUG "local:"); /* * Not implemented yet... */ printk("\n"); } /* wv_local_show */ #endif /* DEBUG_DEVICE_SHOW */ #if defined(DEBUG_RX_INFO) || defined(DEBUG_TX_INFO) /*------------------------------------------------------------------*/ /* * Dump packet header (and content if necessary) on the screen */ static void wv_packet_info(u_char * p, /* Packet to dump */ int length, /* Length of the packet */ char * msg1, /* Name of the device */ char * msg2) /* Name of the function */ { int i; int maxi; printk(KERN_DEBUG "%s: %s(): dest %pM, length %d\n", msg1, msg2, p, length); printk(KERN_DEBUG "%s: %s(): src %pM, type 0x%02X%02X\n", msg1, msg2, &p[6], p[12], p[13]); #ifdef DEBUG_PACKET_DUMP printk(KERN_DEBUG "data=\""); if((maxi = length) > DEBUG_PACKET_DUMP) maxi = DEBUG_PACKET_DUMP; for(i = 14; i < maxi; i++) if(p[i] >= ' ' && p[i] <= '~') printk(" %c", p[i]); else printk("%02X", p[i]); if(maxi < length) printk(".."); printk("\"\n"); printk(KERN_DEBUG "\n"); #endif /* DEBUG_PACKET_DUMP */ } #endif /* defined(DEBUG_RX_INFO) || defined(DEBUG_TX_INFO) */ /*------------------------------------------------------------------*/ /* * This is the information which is displayed by the driver at startup * There is a lot of flag to configure it at your will... */ static void wv_init_info(struct net_device * dev) { unsigned int base = dev->base_addr; psa_t psa; /* Read the parameter storage area */ psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa)); #ifdef DEBUG_PSA_SHOW wv_psa_show(&psa); #endif #ifdef DEBUG_MMC_SHOW wv_mmc_show(dev); #endif #ifdef DEBUG_I82593_SHOW wv_ru_show(dev); #endif #ifdef DEBUG_BASIC_SHOW /* Now, let's go for the basic stuff */ printk(KERN_NOTICE "%s: WaveLAN: port %#x, irq %d, hw_addr %pM", dev->name, base, dev->irq, dev->dev_addr); /* Print current network id */ if(psa.psa_nwid_select) printk(", nwid 0x%02X-%02X", psa.psa_nwid[0], psa.psa_nwid[1]); else printk(", nwid off"); /* If 2.00 card */ if(!(mmc_in(base, mmroff(0, mmr_fee_status)) & (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) { unsigned short freq; /* Ask the EEprom to read the frequency from the first area */ fee_read(base, 0x00 /* 1st area - frequency... */, &freq, 1); /* Print frequency */ printk(", 2.00, %ld", (freq >> 6) + 2400L); /* Hack !!! */ if(freq & 0x20) printk(".5"); } else { printk(", PCMCIA, "); switch (psa.psa_subband) { case PSA_SUBBAND_915: printk("915"); break; case PSA_SUBBAND_2425: printk("2425"); break; case PSA_SUBBAND_2460: printk("2460"); break; case PSA_SUBBAND_2484: printk("2484"); break; case PSA_SUBBAND_2430_5: printk("2430.5"); break; default: printk("unknown"); } } printk(" MHz\n"); #endif /* DEBUG_BASIC_SHOW */ #ifdef DEBUG_VERSION_SHOW /* Print version information */ printk(KERN_NOTICE "%s", version); #endif } /* wv_init_info */ /********************* IOCTL, STATS & RECONFIG *********************/ /* * We found here routines that are called by Linux on differents * occasions after the configuration and not for transmitting data * These may be called when the user use ifconfig, /proc/net/dev * or wireless extensions */ /*------------------------------------------------------------------*/ /* * Get the current ethernet statistics. This may be called with the * card open or closed. * Used when the user read /proc/net/dev */ static en_stats * wavelan_get_stats(struct net_device * dev) { #ifdef DEBUG_IOCTL_TRACE printk(KERN_DEBUG "%s: <>wavelan_get_stats()\n", dev->name); #endif return(&((net_local *)netdev_priv(dev))->stats); } /*------------------------------------------------------------------*/ /* * Set or clear the multicast filter for this adaptor. * num_addrs == -1 Promiscuous mode, receive all packets * num_addrs == 0 Normal mode, clear multicast list * num_addrs > 0 Multicast mode, receive normal and MC packets, * and do best-effort filtering. */ static void wavelan_set_multicast_list(struct net_device * dev) { net_local * lp = netdev_priv(dev); #ifdef DEBUG_IOCTL_TRACE printk(KERN_DEBUG "%s: ->wavelan_set_multicast_list()\n", dev->name); #endif #ifdef DEBUG_IOCTL_INFO printk(KERN_DEBUG "%s: wavelan_set_multicast_list(): setting Rx mode %02X to %d addresses.\n", dev->name, dev->flags, dev->mc_count); #endif if(dev->flags & IFF_PROMISC) { /* * Enable promiscuous mode: receive all packets. */ if(!lp->promiscuous) { lp->promiscuous = 1; lp->allmulticast = 0; lp->mc_count = 0; wv_82593_reconfig(dev); } } else /* If all multicast addresses * or too much multicast addresses for the hardware filter */ if((dev->flags & IFF_ALLMULTI) || (dev->mc_count > I82593_MAX_MULTICAST_ADDRESSES)) { /* * Disable promiscuous mode, but active the all multicast mode */ if(!lp->allmulticast) { lp->promiscuous = 0; lp->allmulticast = 1; lp->mc_count = 0; wv_82593_reconfig(dev); } } else /* If there is some multicast addresses to send */ if(dev->mc_list != (struct dev_mc_list *) NULL) { /* * Disable promiscuous mode, but receive all packets * in multicast list */ #ifdef MULTICAST_AVOID if(lp->promiscuous || lp->allmulticast || (dev->mc_count != lp->mc_count)) #endif { lp->promiscuous = 0; lp->allmulticast = 0; lp->mc_count = dev->mc_count; wv_82593_reconfig(dev); } } else { /* * Switch to normal mode: disable promiscuous mode and * clear the multicast list. */ if(lp->promiscuous || lp->mc_count == 0) { lp->promiscuous = 0; lp->allmulticast = 0; lp->mc_count = 0; wv_82593_reconfig(dev); } } #ifdef DEBUG_IOCTL_TRACE printk(KERN_DEBUG "%s: <-wavelan_set_multicast_list()\n", dev->name); #endif } /*------------------------------------------------------------------*/ /* * This function doesn't exist... * (Note : it was a nice way to test the reconfigure stuff...) */ #ifdef SET_MAC_ADDRESS static int wavelan_set_mac_address(struct net_device * dev, void * addr) { struct sockaddr * mac = addr; /* Copy the address */ memcpy(dev->dev_addr, mac->sa_data, WAVELAN_ADDR_SIZE); /* Reconfig the beast */ wv_82593_reconfig(dev); return 0; } #endif /* SET_MAC_ADDRESS */ /*------------------------------------------------------------------*/ /* * Frequency setting (for hardware able of it) * It's a bit complicated and you don't really want to look into it... */ static int wv_set_frequency(u_long base, /* i/o port of the card */ iw_freq * frequency) { const int BAND_NUM = 10; /* Number of bands */ long freq = 0L; /* offset to 2.4 GHz in .5 MHz */ #ifdef DEBUG_IOCTL_INFO int i; #endif /* Setting by frequency */ /* Theoritically, you may set any frequency between * the two limits with a 0.5 MHz precision. In practice, * I don't want you to have trouble with local * regulations... */ if((frequency->e == 1) && (frequency->m >= (int) 2.412e8) && (frequency->m <= (int) 2.487e8)) { freq = ((frequency->m / 10000) - 24000L) / 5; } /* Setting by channel (same as wfreqsel) */ /* Warning : each channel is 22MHz wide, so some of the channels * will interfere... */ if((frequency->e == 0) && (frequency->m >= 0) && (frequency->m < BAND_NUM)) { /* Get frequency offset. */ freq = channel_bands[frequency->m] >> 1; } /* Verify if the frequency is allowed */ if(freq != 0L) { u_short table[10]; /* Authorized frequency table */ /* Read the frequency table */ fee_read(base, 0x71 /* frequency table */, table, 10); #ifdef DEBUG_IOCTL_INFO printk(KERN_DEBUG "Frequency table :"); for(i = 0; i < 10; i++) { printk(" %04X", table[i]); } printk("\n"); #endif /* Look in the table if the frequency is allowed */ if(!(table[9 - ((freq - 24) / 16)] & (1 << ((freq - 24) % 16)))) return -EINVAL; /* not allowed */ } else return -EINVAL; /* If we get a usable frequency */ if(freq != 0L) { unsigned short area[16]; unsigned short dac[2]; unsigned short area_verify[16]; unsigned short dac_verify[2]; /* Corresponding gain (in the power adjust value table) * see AT&T Wavelan Data Manual, REF 407-024689/E, page 3-8 * & WCIN062D.DOC, page 6.2.9 */ unsigned short power_limit[] = { 40, 80, 120, 160, 0 }; int power_band = 0; /* Selected band */ unsigned short power_adjust; /* Correct value */ /* Search for the gain */ power_band = 0; while((freq > power_limit[power_band]) && (power_limit[++power_band] != 0)) ; /* Read the first area */ fee_read(base, 0x00, area, 16); /* Read the DAC */ fee_read(base, 0x60, dac, 2); /* Read the new power adjust value */ fee_read(base, 0x6B - (power_band >> 1), &power_adjust, 1); if(power_band & 0x1) power_adjust >>= 8; else power_adjust &= 0xFF; #ifdef DEBUG_IOCTL_INFO printk(KERN_DEBUG "Wavelan EEprom Area 1 :"); for(i = 0; i < 16; i++) { printk(" %04X", area[i]); } printk("\n"); printk(KERN_DEBUG "Wavelan EEprom DAC : %04X %04X\n", dac[0], dac[1]); #endif /* Frequency offset (for info only...) */ area[0] = ((freq << 5) & 0xFFE0) | (area[0] & 0x1F); /* Receiver Principle main divider coefficient */ area[3] = (freq >> 1) + 2400L - 352L; area[2] = ((freq & 0x1) << 4) | (area[2] & 0xFFEF); /* Transmitter Main divider coefficient */ area[13] = (freq >> 1) + 2400L; area[12] = ((freq & 0x1) << 4) | (area[2] & 0xFFEF); /* Others part of the area are flags, bit streams or unused... */ /* Set the value in the DAC */ dac[1] = ((power_adjust >> 1) & 0x7F) | (dac[1] & 0xFF80); dac[0] = ((power_adjust & 0x1) << 4) | (dac[0] & 0xFFEF); /* Write the first area */ fee_write(base, 0x00, area, 16); /* Write the DAC */ fee_write(base, 0x60, dac, 2); /* We now should verify here that the EEprom writing was ok */ /* ReRead the first area */ fee_read(base, 0x00, area_verify, 16); /* ReRead the DAC */ fee_read(base, 0x60, dac_verify, 2); /* Compare */ if(memcmp(area, area_verify, 16 * 2) || memcmp(dac, dac_verify, 2 * 2)) { #ifdef DEBUG_IOCTL_ERROR printk(KERN_INFO "Wavelan: wv_set_frequency : unable to write new frequency to EEprom (?)\n"); #endif return -EOPNOTSUPP; } /* We must download the frequency parameters to the * synthetisers (from the EEprom - area 1) * Note : as the EEprom is auto decremented, we set the end * if the area... */ mmc_out(base, mmwoff(0, mmw_fee_addr), 0x0F); mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD); /* Wait until the download is finished */ fee_wait(base, 100, 100); /* We must now download the power adjust value (gain) to * the synthetisers (from the EEprom - area 7 - DAC) */ mmc_out(base, mmwoff(0, mmw_fee_addr), 0x61); mmc_out(base, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD); /* Wait until the download is finished */ fee_wait(base, 100, 100); #ifdef DEBUG_IOCTL_INFO /* Verification of what we have done... */ printk(KERN_DEBUG "Wavelan EEprom Area 1 :"); for(i = 0; i < 16; i++) { printk(" %04X", area_verify[i]); } printk("\n"); printk(KERN_DEBUG "Wavelan EEprom DAC : %04X %04X\n", dac_verify[0], dac_verify[1]); #endif return 0; } else return -EINVAL; /* Bah, never get there... */ } /*------------------------------------------------------------------*/ /* * Give the list of available frequencies */ static int wv_frequency_list(u_long base, /* i/o port of the card */ iw_freq * list, /* List of frequency to fill */ int max) /* Maximum number of frequencies */ { u_short table[10]; /* Authorized frequency table */ long freq = 0L; /* offset to 2.4 GHz in .5 MHz + 12 MHz */ int i; /* index in the table */ const int BAND_NUM = 10; /* Number of bands */ int c = 0; /* Channel number */ /* Read the frequency table */ fee_read(base, 0x71 /* frequency table */, table, 10); /* Look all frequencies */ i = 0; for(freq = 0; freq < 150; freq++) /* Look in the table if the frequency is allowed */ if(table[9 - (freq / 16)] & (1 << (freq % 16))) { /* Compute approximate channel number */ while((((channel_bands[c] >> 1) - 24) < freq) && (c < BAND_NUM)) c++; list[i].i = c; /* Set the list index */ /* put in the list */ list[i].m = (((freq + 24) * 5) + 24000L) * 10000; list[i++].e = 1; /* Check number */ if(i >= max) return(i); } return(i); } #ifdef IW_WIRELESS_SPY /*------------------------------------------------------------------*/ /* * Gather wireless spy statistics : for each packet, compare the source * address with out list, and if match, get the stats... * Sorry, but this function really need wireless extensions... */ static inline void wl_spy_gather(struct net_device * dev, u_char * mac, /* MAC address */ u_char * stats) /* Statistics to gather */ { struct iw_quality wstats; wstats.qual = stats[2] & MMR_SGNL_QUAL; wstats.level = stats[0] & MMR_SIGNAL_LVL; wstats.noise = stats[1] & MMR_SILENCE_LVL; wstats.updated = 0x7; /* Update spy records */ wireless_spy_update(dev, mac, &wstats); } #endif /* IW_WIRELESS_SPY */ #ifdef HISTOGRAM /*------------------------------------------------------------------*/ /* * This function calculate an histogram on the signal level. * As the noise is quite constant, it's like doing it on the SNR. * We have defined a set of interval (lp->his_range), and each time * the level goes in that interval, we increment the count (lp->his_sum). * With this histogram you may detect if one wavelan is really weak, * or you may also calculate the mean and standard deviation of the level... */ static inline void wl_his_gather(struct net_device * dev, u_char * stats) /* Statistics to gather */ { net_local * lp = netdev_priv(dev); u_char level = stats[0] & MMR_SIGNAL_LVL; int i; /* Find the correct interval */ i = 0; while((i < (lp->his_number - 1)) && (level >= lp->his_range[i++])) ; /* Increment interval counter */ (lp->his_sum[i])++; } #endif /* HISTOGRAM */ static void wl_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { strncpy(info->driver, "wavelan_cs", sizeof(info->driver)-1); } static const struct ethtool_ops ops = { .get_drvinfo = wl_get_drvinfo }; /*------------------------------------------------------------------*/ /* * Wireless Handler : get protocol name */ static int wavelan_get_name(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { strcpy(wrqu->name, "WaveLAN"); return 0; } /*------------------------------------------------------------------*/ /* * Wireless Handler : set NWID */ static int wavelan_set_nwid(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); psa_t psa; mm_t m; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Set NWID in WaveLAN. */ if (!wrqu->nwid.disabled) { /* Set NWID in psa */ psa.psa_nwid[0] = (wrqu->nwid.value & 0xFF00) >> 8; psa.psa_nwid[1] = wrqu->nwid.value & 0xFF; psa.psa_nwid_select = 0x01; psa_write(dev, (char *) psa.psa_nwid - (char *) &psa, (unsigned char *) psa.psa_nwid, 3); /* Set NWID in mmc. */ m.w.mmw_netw_id_l = psa.psa_nwid[1]; m.w.mmw_netw_id_h = psa.psa_nwid[0]; mmc_write(base, (char *) &m.w.mmw_netw_id_l - (char *) &m, (unsigned char *) &m.w.mmw_netw_id_l, 2); mmc_out(base, mmwoff(0, mmw_loopt_sel), 0x00); } else { /* Disable NWID in the psa. */ psa.psa_nwid_select = 0x00; psa_write(dev, (char *) &psa.psa_nwid_select - (char *) &psa, (unsigned char *) &psa.psa_nwid_select, 1); /* Disable NWID in the mmc (no filtering). */ mmc_out(base, mmwoff(0, mmw_loopt_sel), MMW_LOOPT_SEL_DIS_NWID); } /* update the Wavelan checksum */ update_psa_checksum(dev); /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get NWID */ static int wavelan_get_nwid(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Read the NWID. */ psa_read(dev, (char *) psa.psa_nwid - (char *) &psa, (unsigned char *) psa.psa_nwid, 3); wrqu->nwid.value = (psa.psa_nwid[0] << 8) + psa.psa_nwid[1]; wrqu->nwid.disabled = !(psa.psa_nwid_select); wrqu->nwid.fixed = 1; /* Superfluous */ /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : set frequency */ static int wavelan_set_freq(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); unsigned long flags; int ret; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable). */ if (!(mmc_in(base, mmroff(0, mmr_fee_status)) & (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) ret = wv_set_frequency(base, &(wrqu->freq)); else ret = -EOPNOTSUPP; /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get frequency */ static int wavelan_get_freq(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable). * Does it work for everybody, especially old cards? */ if (!(mmc_in(base, mmroff(0, mmr_fee_status)) & (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) { unsigned short freq; /* Ask the EEPROM to read the frequency from the first area. */ fee_read(base, 0x00, &freq, 1); wrqu->freq.m = ((freq >> 5) * 5 + 24000L) * 10000; wrqu->freq.e = 1; } else { psa_read(dev, (char *) &psa.psa_subband - (char *) &psa, (unsigned char *) &psa.psa_subband, 1); if (psa.psa_subband <= 4) { wrqu->freq.m = fixed_bands[psa.psa_subband]; wrqu->freq.e = (psa.psa_subband != 0); } else ret = -EOPNOTSUPP; } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : set level threshold */ static int wavelan_set_sens(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Set the level threshold. */ /* We should complain loudly if wrqu->sens.fixed = 0, because we * can't set auto mode... */ psa.psa_thr_pre_set = wrqu->sens.value & 0x3F; psa_write(dev, (char *) &psa.psa_thr_pre_set - (char *) &psa, (unsigned char *) &psa.psa_thr_pre_set, 1); /* update the Wavelan checksum */ update_psa_checksum(dev); mmc_out(base, mmwoff(0, mmw_thr_pre_set), psa.psa_thr_pre_set); /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get level threshold */ static int wavelan_get_sens(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Read the level threshold. */ psa_read(dev, (char *) &psa.psa_thr_pre_set - (char *) &psa, (unsigned char *) &psa.psa_thr_pre_set, 1); wrqu->sens.value = psa.psa_thr_pre_set & 0x3F; wrqu->sens.fixed = 1; /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : set encryption key */ static int wavelan_set_encode(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); unsigned long flags; psa_t psa; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Check if capable of encryption */ if (!mmc_encr(base)) { ret = -EOPNOTSUPP; } /* Check the size of the key */ if((wrqu->encoding.length != 8) && (wrqu->encoding.length != 0)) { ret = -EINVAL; } if(!ret) { /* Basic checking... */ if (wrqu->encoding.length == 8) { /* Copy the key in the driver */ memcpy(psa.psa_encryption_key, extra, wrqu->encoding.length); psa.psa_encryption_select = 1; psa_write(dev, (char *) &psa.psa_encryption_select - (char *) &psa, (unsigned char *) &psa. psa_encryption_select, 8 + 1); mmc_out(base, mmwoff(0, mmw_encr_enable), MMW_ENCR_ENABLE_EN | MMW_ENCR_ENABLE_MODE); mmc_write(base, mmwoff(0, mmw_encr_key), (unsigned char *) &psa. psa_encryption_key, 8); } /* disable encryption */ if (wrqu->encoding.flags & IW_ENCODE_DISABLED) { psa.psa_encryption_select = 0; psa_write(dev, (char *) &psa.psa_encryption_select - (char *) &psa, (unsigned char *) &psa. psa_encryption_select, 1); mmc_out(base, mmwoff(0, mmw_encr_enable), 0); } /* update the Wavelan checksum */ update_psa_checksum(dev); } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get encryption key */ static int wavelan_get_encode(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Check if encryption is available */ if (!mmc_encr(base)) { ret = -EOPNOTSUPP; } else { /* Read the encryption key */ psa_read(dev, (char *) &psa.psa_encryption_select - (char *) &psa, (unsigned char *) &psa. psa_encryption_select, 1 + 8); /* encryption is enabled ? */ if (psa.psa_encryption_select) wrqu->encoding.flags = IW_ENCODE_ENABLED; else wrqu->encoding.flags = IW_ENCODE_DISABLED; wrqu->encoding.flags |= mmc_encr(base); /* Copy the key to the user buffer */ wrqu->encoding.length = 8; memcpy(extra, psa.psa_encryption_key, wrqu->encoding.length); } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } #ifdef WAVELAN_ROAMING_EXT /*------------------------------------------------------------------*/ /* * Wireless Handler : set ESSID (domain) */ static int wavelan_set_essid(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Check if disable */ if(wrqu->data.flags == 0) lp->filter_domains = 0; else { char essid[IW_ESSID_MAX_SIZE + 1]; char * endp; /* Terminate the string */ memcpy(essid, extra, wrqu->data.length); essid[IW_ESSID_MAX_SIZE] = '\0'; #ifdef DEBUG_IOCTL_INFO printk(KERN_DEBUG "SetEssid : ``%s''\n", essid); #endif /* DEBUG_IOCTL_INFO */ /* Convert to a number (note : Wavelan specific) */ lp->domain_id = simple_strtoul(essid, &endp, 16); /* Has it worked ? */ if(endp > essid) lp->filter_domains = 1; else { lp->filter_domains = 0; ret = -EINVAL; } } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get ESSID (domain) */ static int wavelan_get_essid(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); /* Is the domain ID active ? */ wrqu->data.flags = lp->filter_domains; /* Copy Domain ID into a string (Wavelan specific) */ /* Sound crazy, be we can't have a snprintf in the kernel !!! */ sprintf(extra, "%lX", lp->domain_id); extra[IW_ESSID_MAX_SIZE] = '\0'; /* Set the length */ wrqu->data.length = strlen(extra); return 0; } /*------------------------------------------------------------------*/ /* * Wireless Handler : set AP address */ static int wavelan_set_wap(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { #ifdef DEBUG_IOCTL_INFO printk(KERN_DEBUG "Set AP to : %pM\n", wrqu->ap_addr.sa_data); #endif /* DEBUG_IOCTL_INFO */ return -EOPNOTSUPP; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get AP address */ static int wavelan_get_wap(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { /* Should get the real McCoy instead of own Ethernet address */ memcpy(wrqu->ap_addr.sa_data, dev->dev_addr, WAVELAN_ADDR_SIZE); wrqu->ap_addr.sa_family = ARPHRD_ETHER; return -EOPNOTSUPP; } #endif /* WAVELAN_ROAMING_EXT */ #ifdef WAVELAN_ROAMING /*------------------------------------------------------------------*/ /* * Wireless Handler : set mode */ static int wavelan_set_mode(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); unsigned long flags; int ret = 0; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Check mode */ switch(wrqu->mode) { case IW_MODE_ADHOC: if(do_roaming) { wv_roam_cleanup(dev); do_roaming = 0; } break; case IW_MODE_INFRA: if(!do_roaming) { wv_roam_init(dev); do_roaming = 1; } break; default: ret = -EINVAL; } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Handler : get mode */ static int wavelan_get_mode(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { if(do_roaming) wrqu->mode = IW_MODE_INFRA; else wrqu->mode = IW_MODE_ADHOC; return 0; } #endif /* WAVELAN_ROAMING */ /*------------------------------------------------------------------*/ /* * Wireless Handler : get range info */ static int wavelan_get_range(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); struct iw_range *range = (struct iw_range *) extra; unsigned long flags; int ret = 0; /* Set the length (very important for backward compatibility) */ wrqu->data.length = sizeof(struct iw_range); /* Set all the info we don't care or don't know about to zero */ memset(range, 0, sizeof(struct iw_range)); /* Set the Wireless Extension versions */ range->we_version_compiled = WIRELESS_EXT; range->we_version_source = 9; /* Set information in the range struct. */ range->throughput = 1.4 * 1000 * 1000; /* don't argue on this ! */ range->min_nwid = 0x0000; range->max_nwid = 0xFFFF; range->sensitivity = 0x3F; range->max_qual.qual = MMR_SGNL_QUAL; range->max_qual.level = MMR_SIGNAL_LVL; range->max_qual.noise = MMR_SILENCE_LVL; range->avg_qual.qual = MMR_SGNL_QUAL; /* Always max */ /* Need to get better values for those two */ range->avg_qual.level = 30; range->avg_qual.noise = 8; range->num_bitrates = 1; range->bitrate[0] = 2000000; /* 2 Mb/s */ /* Event capability (kernel + driver) */ range->event_capa[0] = (IW_EVENT_CAPA_MASK(0x8B02) | IW_EVENT_CAPA_MASK(0x8B04) | IW_EVENT_CAPA_MASK(0x8B06)); range->event_capa[1] = IW_EVENT_CAPA_K_1; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable). */ if (!(mmc_in(base, mmroff(0, mmr_fee_status)) & (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) { range->num_channels = 10; range->num_frequency = wv_frequency_list(base, range->freq, IW_MAX_FREQUENCIES); } else range->num_channels = range->num_frequency = 0; /* Encryption supported ? */ if (mmc_encr(base)) { range->encoding_size[0] = 8; /* DES = 64 bits key */ range->num_encoding_sizes = 1; range->max_encoding_tokens = 1; /* Only one key possible */ } else { range->num_encoding_sizes = 0; range->max_encoding_tokens = 0; } /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return ret; } /*------------------------------------------------------------------*/ /* * Wireless Private Handler : set quality threshold */ static int wavelan_set_qthr(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { unsigned int base = dev->base_addr; net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); psa.psa_quality_thr = *(extra) & 0x0F; psa_write(dev, (char *) &psa.psa_quality_thr - (char *) &psa, (unsigned char *) &psa.psa_quality_thr, 1); /* update the Wavelan checksum */ update_psa_checksum(dev); mmc_out(base, mmwoff(0, mmw_quality_thr), psa.psa_quality_thr); /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return 0; } /*------------------------------------------------------------------*/ /* * Wireless Private Handler : get quality threshold */ static int wavelan_get_qthr(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); psa_t psa; unsigned long flags; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); psa_read(dev, (char *) &psa.psa_quality_thr - (char *) &psa, (unsigned char *) &psa.psa_quality_thr, 1); *(extra) = psa.psa_quality_thr & 0x0F; /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return 0; } #ifdef WAVELAN_ROAMING /*------------------------------------------------------------------*/ /* * Wireless Private Handler : set roaming */ static int wavelan_set_roam(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); unsigned long flags; /* Disable interrupts and save flags. */ spin_lock_irqsave(&lp->spinlock, flags); /* Note : should check if user == root */ if(do_roaming && (*extra)==0) wv_roam_cleanup(dev); else if(do_roaming==0 && (*extra)!=0) wv_roam_init(dev); do_roaming = (*extra); /* Enable interrupts and restore flags. */ spin_unlock_irqrestore(&lp->spinlock, flags); return 0; } /*------------------------------------------------------------------*/ /* * Wireless Private Handler : get quality threshold */ static int wavelan_get_roam(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { *(extra) = do_roaming; return 0; } #endif /* WAVELAN_ROAMING */ #ifdef HISTOGRAM /*------------------------------------------------------------------*/ /* * Wireless Private Handler : set histogram */ static int wavelan_set_histo(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); /* Check the number of intervals. */ if (wrqu->data.length > 16) { return(-E2BIG); } /* Disable histo while we copy the addresses. * As we don't disable interrupts, we need to do this */ lp->his_number = 0; /* Are there ranges to copy? */ if (wrqu->data.length > 0) { /* Copy interval ranges to the driver */ memcpy(lp->his_range, extra, wrqu->data.length); { int i; printk(KERN_DEBUG "Histo :"); for(i = 0; i < wrqu->data.length; i++) printk(" %d", lp->his_range[i]); printk("\n"); } /* Reset result structure. */ memset(lp->his_sum, 0x00, sizeof(long) * 16); } /* Now we can set the number of ranges */ lp->his_number = wrqu->data.length; return(0); } /*------------------------------------------------------------------*/ /* * Wireless Private Handler : get histogram */ static int wavelan_get_histo(struct net_device *dev, struct iw_request_info *info, union iwreq_data *wrqu, char *extra) { net_local *lp = netdev_priv(dev); /* Set the number of intervals. */ wrqu->data.length = lp->his_number; /* Give back the distribution statistics */ if(lp->his_number > 0) memcpy(extra, lp->his_sum, sizeof(long) * lp->his_number); return(0); } #endif /* HISTOGRAM */ /*------------------------------------------------------------------*/ /* * Structures to export the Wireless Handlers */ static const struct iw_priv_args wavelan_private_args[] = { /*{ cmd, set_args, get_args, name } */ { SIOCSIPQTHR, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, 0, "setqualthr" }, { SIOCGIPQTHR, 0, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, "getqualthr" }, { SIOCSIPROAM, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, 0, "setroam" }, { SIOCGIPROAM, 0, IW_PRIV_TYPE_BYTE | IW_PRIV_SIZE_FIXED | 1, "getroam" }, { SIOCSIPHISTO, IW_PRIV_TYPE_BYTE | 16, 0, "sethisto" }, { SIOCGIPHISTO, 0, IW_PRIV_TYPE_INT | 16, "gethisto" }, }; static const iw_handler wavelan_handler[] = { NULL, /* SIOCSIWNAME */ wavelan_get_name, /* SIOCGIWNAME */ wavelan_set_nwid, /* SIOCSIWNWID */ wavelan_get_nwid, /* SIOCGIWNWID */ wavelan_set_freq, /* SIOCSIWFREQ */ wavelan_get_freq, /* SIOCGIWFREQ */ #ifdef WAVELAN_ROAMING wavelan_set_mode, /* SIOCSIWMODE */ wavelan_get_mode, /* SIOCGIWMODE */ #else /* WAVELAN_ROAMING */ NULL, /* SIOCSIWMODE */ NULL, /* SIOCGIWMODE */ #endif /* WAVELAN_ROAMING */ wavelan_set_sens, /* SIOCSIWSENS */ wavelan_get_sens, /* SIOCGIWSENS */ NULL, /* SIOCSIWRANGE */ wavelan_get_range, /* SIOCGIWRANGE */ NULL, /* SIOCSIWPRIV */ NULL, /* SIOCGIWPRIV */ NULL, /* SIOCSIWSTATS */ NULL, /* SIOCGIWSTATS */ iw_handler_set_spy, /* SIOCSIWSPY */ iw_handler_get_spy, /* SIOCGIWSPY */ iw_handler_set_thrspy, /* SIOCSIWTHRSPY */ iw_handler_get_thrspy, /* SIOCGIWTHRSPY */ #ifdef WAVELAN_ROAMING_EXT wavelan_set_wap, /* SIOCSIWAP */ wavelan_get_wap, /* SIOCGIWAP */ NULL, /* -- hole -- */ NULL, /* SIOCGIWAPLIST */ NULL, /* -- hole -- */ NULL, /* -- hole -- */ wavelan_set_essid, /* SIOCSIWESSID */ wavelan_get_essid, /* SIOCGIWESSID */ #else /* WAVELAN_ROAMING_EXT */ NULL, /* SIOCSIWAP */ NULL, /* SIOCGIWAP */ NULL, /* -- hole -- */ NULL, /* SIOCGIWAPLIST */ NULL, /* -- hole -- */ NULL, /* -- hole -- */ NULL, /* SIOCSIWESSID */ NULL, /* SIOCGIWESSID */ #endif /* WAVELAN_ROAMING_EXT */ NULL, /* SIOCSIWNICKN */ NULL, /* SIOCGIWNICKN */ NULL, /* -- hole -- */ NULL, /* -- hole -- */ NULL, /* SIOCSIWRATE */ NULL, /* SIOCGIWRATE */ NULL, /* SIOCSIWRTS */ NULL, /* SIOCGIWRTS */ NULL, /* SIOCSIWFRAG */ NULL, /* SIOCGIWFRAG */ NULL, /* SIOCSIWTXPOW */ NULL, /* SIOCGIWTXPOW */ NULL, /* SIOCSIWRETRY */ NULL, /* SIOCGIWRETRY */ wavelan_set_encode, /* SIOCSIWENCODE */ wavelan_get_encode, /* SIOCGIWENCODE */ }; static const iw_handler wavelan_private_handler[] = { wavelan_set_qthr, /* SIOCIWFIRSTPRIV */ wavelan_get_qthr, /* SIOCIWFIRSTPRIV + 1 */ #ifdef WAVELAN_ROAMING wavelan_set_roam, /* SIOCIWFIRSTPRIV + 2 */ wavelan_get_roam, /* SIOCIWFIRSTPRIV + 3 */ #else /* WAVELAN_ROAMING */ NULL, /* SIOCIWFIRSTPRIV + 2 */ NULL, /* SIOCIWFIRSTPRIV + 3 */ #endif /* WAVELAN_ROAMING */ #ifdef HISTOGRAM wavelan_set_histo, /* SIOCIWFIRSTPRIV + 4 */ wavelan_get_histo, /* SIOCIWFIRSTPRIV + 5 */ #endif /* HISTOGRAM */ }; static const struct iw_handler_def wavelan_handler_def = { .num_standard = ARRAY_SIZE(wavelan_handler), .num_private = ARRAY_SIZE(wavelan_private_handler), .num_private_args = ARRAY_SIZE(wavelan_private_args), .standard = wavelan_handler, .private = wavelan_private_handler, .private_args = wavelan_private_args, .get_wireless_stats = wavelan_get_wireless_stats, }; /*------------------------------------------------------------------*/ /* * Get wireless statistics * Called by /proc/net/wireless... */ static iw_stats * wavelan_get_wireless_stats(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); mmr_t m; iw_stats * wstats; unsigned long flags; #ifdef DEBUG_IOCTL_TRACE printk(KERN_DEBUG "%s: ->wavelan_get_wireless_stats()\n", dev->name); #endif /* Disable interrupts & save flags */ spin_lock_irqsave(&lp->spinlock, flags); wstats = &lp->wstats; /* Get data from the mmc */ mmc_out(base, mmwoff(0, mmw_freeze), 1); mmc_read(base, mmroff(0, mmr_dce_status), &m.mmr_dce_status, 1); mmc_read(base, mmroff(0, mmr_wrong_nwid_l), &m.mmr_wrong_nwid_l, 2); mmc_read(base, mmroff(0, mmr_thr_pre_set), &m.mmr_thr_pre_set, 4); mmc_out(base, mmwoff(0, mmw_freeze), 0); /* Copy data to wireless stuff */ wstats->status = m.mmr_dce_status & MMR_DCE_STATUS; wstats->qual.qual = m.mmr_sgnl_qual & MMR_SGNL_QUAL; wstats->qual.level = m.mmr_signal_lvl & MMR_SIGNAL_LVL; wstats->qual.noise = m.mmr_silence_lvl & MMR_SILENCE_LVL; wstats->qual.updated = (((m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) >> 7) | ((m.mmr_signal_lvl & MMR_SIGNAL_LVL_VALID) >> 6) | ((m.mmr_silence_lvl & MMR_SILENCE_LVL_VALID) >> 5)); wstats->discard.nwid += (m.mmr_wrong_nwid_h << 8) | m.mmr_wrong_nwid_l; wstats->discard.code = 0L; wstats->discard.misc = 0L; /* ReEnable interrupts & restore flags */ spin_unlock_irqrestore(&lp->spinlock, flags); #ifdef DEBUG_IOCTL_TRACE printk(KERN_DEBUG "%s: <-wavelan_get_wireless_stats()\n", dev->name); #endif return &lp->wstats; } /************************* PACKET RECEPTION *************************/ /* * This part deal with receiving the packets. * The interrupt handler get an interrupt when a packet has been * successfully received and called this part... */ /*------------------------------------------------------------------*/ /* * Calculate the starting address of the frame pointed to by the receive * frame pointer and verify that the frame seem correct * (called by wv_packet_rcv()) */ static int wv_start_of_frame(struct net_device * dev, int rfp, /* end of frame */ int wrap) /* start of buffer */ { unsigned int base = dev->base_addr; int rp; int len; rp = (rfp - 5 + RX_SIZE) % RX_SIZE; outb(rp & 0xff, PIORL(base)); outb(((rp >> 8) & PIORH_MASK), PIORH(base)); len = inb(PIOP(base)); len |= inb(PIOP(base)) << 8; /* Sanity checks on size */ /* Frame too big */ if(len > MAXDATAZ + 100) { #ifdef DEBUG_RX_ERROR printk(KERN_INFO "%s: wv_start_of_frame: Received frame too large, rfp %d len 0x%x\n", dev->name, rfp, len); #endif return(-1); } /* Frame too short */ if(len < 7) { #ifdef DEBUG_RX_ERROR printk(KERN_INFO "%s: wv_start_of_frame: Received null frame, rfp %d len 0x%x\n", dev->name, rfp, len); #endif return(-1); } /* Wrap around buffer */ if(len > ((wrap - (rfp - len) + RX_SIZE) % RX_SIZE)) /* magic formula ! */ { #ifdef DEBUG_RX_ERROR printk(KERN_INFO "%s: wv_start_of_frame: wrap around buffer, wrap %d rfp %d len 0x%x\n", dev->name, wrap, rfp, len); #endif return(-1); } return((rp - len + RX_SIZE) % RX_SIZE); } /* wv_start_of_frame */ /*------------------------------------------------------------------*/ /* * This routine does the actual copy of data (including the ethernet * header structure) from the WaveLAN card to an sk_buff chain that * will be passed up to the network interface layer. NOTE: We * currently don't handle trailer protocols (neither does the rest of * the network interface), so if that is needed, it will (at least in * part) be added here. The contents of the receive ring buffer are * copied to a message chain that is then passed to the kernel. * * Note: if any errors occur, the packet is "dropped on the floor" * (called by wv_packet_rcv()) */ static void wv_packet_read(struct net_device * dev, int fd_p, int sksize) { net_local * lp = netdev_priv(dev); struct sk_buff * skb; #ifdef DEBUG_RX_TRACE printk(KERN_DEBUG "%s: ->wv_packet_read(0x%X, %d)\n", dev->name, fd_p, sksize); #endif /* Allocate some buffer for the new packet */ if((skb = dev_alloc_skb(sksize+2)) == (struct sk_buff *) NULL) { #ifdef DEBUG_RX_ERROR printk(KERN_INFO "%s: wv_packet_read(): could not alloc_skb(%d, GFP_ATOMIC)\n", dev->name, sksize); #endif lp->stats.rx_dropped++; /* * Not only do we want to return here, but we also need to drop the * packet on the floor to clear the interrupt. */ return; } skb_reserve(skb, 2); fd_p = read_ringbuf(dev, fd_p, (char *) skb_put(skb, sksize), sksize); skb->protocol = eth_type_trans(skb, dev); #ifdef DEBUG_RX_INFO wv_packet_info(skb_mac_header(skb), sksize, dev->name, "wv_packet_read"); #endif /* DEBUG_RX_INFO */ /* Statistics gathering & stuff associated. * It seem a bit messy with all the define, but it's really simple... */ if( #ifdef IW_WIRELESS_SPY (lp->spy_data.spy_number > 0) || #endif /* IW_WIRELESS_SPY */ #ifdef HISTOGRAM (lp->his_number > 0) || #endif /* HISTOGRAM */ #ifdef WAVELAN_ROAMING (do_roaming) || #endif /* WAVELAN_ROAMING */ 0) { u_char stats[3]; /* Signal level, Noise level, Signal quality */ /* read signal level, silence level and signal quality bytes */ fd_p = read_ringbuf(dev, (fd_p + 4) % RX_SIZE + RX_BASE, stats, 3); #ifdef DEBUG_RX_INFO printk(KERN_DEBUG "%s: wv_packet_read(): Signal level %d/63, Silence level %d/63, signal quality %d/16\n", dev->name, stats[0] & 0x3F, stats[1] & 0x3F, stats[2] & 0x0F); #endif #ifdef WAVELAN_ROAMING if(do_roaming) if(WAVELAN_BEACON(skb->data)) wl_roam_gather(dev, skb->data, stats); #endif /* WAVELAN_ROAMING */ #ifdef WIRELESS_SPY wl_spy_gather(dev, skb_mac_header(skb) + WAVELAN_ADDR_SIZE, stats); #endif /* WIRELESS_SPY */ #ifdef HISTOGRAM wl_his_gather(dev, stats); #endif /* HISTOGRAM */ } /* * Hand the packet to the Network Module */ netif_rx(skb); /* Keep stats up to date */ lp->stats.rx_packets++; lp->stats.rx_bytes += sksize; #ifdef DEBUG_RX_TRACE printk(KERN_DEBUG "%s: <-wv_packet_read()\n", dev->name); #endif return; } /*------------------------------------------------------------------*/ /* * This routine is called by the interrupt handler to initiate a * packet transfer from the card to the network interface layer above * this driver. This routine checks if a buffer has been successfully * received by the WaveLAN card. If so, the routine wv_packet_read is * called to do the actual transfer of the card's data including the * ethernet header into a packet consisting of an sk_buff chain. * (called by wavelan_interrupt()) * Note : the spinlock is already grabbed for us and irq are disabled. */ static void wv_packet_rcv(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); int newrfp; int rp; int len; int f_start; int status; int i593_rfp; int stat_ptr; u_char c[4]; #ifdef DEBUG_RX_TRACE printk(KERN_DEBUG "%s: ->wv_packet_rcv()\n", dev->name); #endif /* Get the new receive frame pointer from the i82593 chip */ outb(CR0_STATUS_2 | OP0_NOP, LCCR(base)); i593_rfp = inb(LCSR(base)); i593_rfp |= inb(LCSR(base)) << 8; i593_rfp %= RX_SIZE; /* Get the new receive frame pointer from the WaveLAN card. * It is 3 bytes more than the increment of the i82593 receive * frame pointer, for each packet. This is because it includes the * 3 roaming bytes added by the mmc. */ newrfp = inb(RPLL(base)); newrfp |= inb(RPLH(base)) << 8; newrfp %= RX_SIZE; #ifdef DEBUG_RX_INFO printk(KERN_DEBUG "%s: wv_packet_rcv(): i593_rfp %d stop %d newrfp %d lp->rfp %d\n", dev->name, i593_rfp, lp->stop, newrfp, lp->rfp); #endif #ifdef DEBUG_RX_ERROR /* If no new frame pointer... */ if(lp->overrunning || newrfp == lp->rfp) printk(KERN_INFO "%s: wv_packet_rcv(): no new frame: i593_rfp %d stop %d newrfp %d lp->rfp %d\n", dev->name, i593_rfp, lp->stop, newrfp, lp->rfp); #endif /* Read all frames (packets) received */ while(newrfp != lp->rfp) { /* A frame is composed of the packet, followed by a status word, * the length of the frame (word) and the mmc info (SNR & qual). * It's because the length is at the end that we can only scan * frames backward. */ /* Find the first frame by skipping backwards over the frames */ rp = newrfp; /* End of last frame */ while(((f_start = wv_start_of_frame(dev, rp, newrfp)) != lp->rfp) && (f_start != -1)) rp = f_start; /* If we had a problem */ if(f_start == -1) { #ifdef DEBUG_RX_ERROR printk(KERN_INFO "wavelan_cs: cannot find start of frame "); printk(" i593_rfp %d stop %d newrfp %d lp->rfp %d\n", i593_rfp, lp->stop, newrfp, lp->rfp); #endif lp->rfp = rp; /* Get to the last usable frame */ continue; } /* f_start point to the beggining of the first frame received * and rp to the beggining of the next one */ /* Read status & length of the frame */ stat_ptr = (rp - 7 + RX_SIZE) % RX_SIZE; stat_ptr = read_ringbuf(dev, stat_ptr, c, 4); status = c[0] | (c[1] << 8); len = c[2] | (c[3] << 8); /* Check status */ if((status & RX_RCV_OK) != RX_RCV_OK) { lp->stats.rx_errors++; if(status & RX_NO_SFD) lp->stats.rx_frame_errors++; if(status & RX_CRC_ERR) lp->stats.rx_crc_errors++; if(status & RX_OVRRUN) lp->stats.rx_over_errors++; #ifdef DEBUG_RX_FAIL printk(KERN_DEBUG "%s: wv_packet_rcv(): packet not received ok, status = 0x%x\n", dev->name, status); #endif } else /* Read the packet and transmit to Linux */ wv_packet_read(dev, f_start, len - 2); /* One frame has been processed, skip it */ lp->rfp = rp; } /* * Update the frame stop register, but set it to less than * the full 8K to allow space for 3 bytes of signal strength * per packet. */ lp->stop = (i593_rfp + RX_SIZE - ((RX_SIZE / 64) * 3)) % RX_SIZE; outb(OP0_SWIT_TO_PORT_1 | CR0_CHNL, LCCR(base)); outb(CR1_STOP_REG_UPDATE | (lp->stop >> RX_SIZE_SHIFT), LCCR(base)); outb(OP1_SWIT_TO_PORT_0, LCCR(base)); #ifdef DEBUG_RX_TRACE printk(KERN_DEBUG "%s: <-wv_packet_rcv()\n", dev->name); #endif } /*********************** PACKET TRANSMISSION ***********************/ /* * This part deal with sending packet through the wavelan * We copy the packet to the send buffer and then issue the send * command to the i82593. The result of this operation will be * checked in wavelan_interrupt() */ /*------------------------------------------------------------------*/ /* * This routine fills in the appropriate registers and memory * locations on the WaveLAN card and starts the card off on * the transmit. * (called in wavelan_packet_xmit()) */ static void wv_packet_write(struct net_device * dev, void * buf, short length) { net_local * lp = netdev_priv(dev); unsigned int base = dev->base_addr; unsigned long flags; int clen = length; register u_short xmtdata_base = TX_BASE; #ifdef DEBUG_TX_TRACE printk(KERN_DEBUG "%s: ->wv_packet_write(%d)\n", dev->name, length); #endif spin_lock_irqsave(&lp->spinlock, flags); /* Write the length of data buffer followed by the buffer */ outb(xmtdata_base & 0xff, PIORL(base)); outb(((xmtdata_base >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base)); outb(clen & 0xff, PIOP(base)); /* lsb */ outb(clen >> 8, PIOP(base)); /* msb */ /* Send the data */ outsb(PIOP(base), buf, clen); /* Indicate end of transmit chain */ outb(OP0_NOP, PIOP(base)); /* josullvn@cs.cmu.edu: need to send a second NOP for alignment... */ outb(OP0_NOP, PIOP(base)); /* Reset the transmit DMA pointer */ hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET); hacr_write(base, HACR_DEFAULT); /* Send the transmit command */ wv_82593_cmd(dev, "wv_packet_write(): transmit", OP0_TRANSMIT, SR0_NO_RESULT); /* Make sure the watchdog will keep quiet for a while */ dev->trans_start = jiffies; /* Keep stats up to date */ lp->stats.tx_bytes += length; spin_unlock_irqrestore(&lp->spinlock, flags); #ifdef DEBUG_TX_INFO wv_packet_info((u_char *) buf, length, dev->name, "wv_packet_write"); #endif /* DEBUG_TX_INFO */ #ifdef DEBUG_TX_TRACE printk(KERN_DEBUG "%s: <-wv_packet_write()\n", dev->name); #endif } /*------------------------------------------------------------------*/ /* * This routine is called when we want to send a packet (NET3 callback) * In this routine, we check if the harware is ready to accept * the packet. We also prevent reentrance. Then, we call the function * to send the packet... */ static int wavelan_packet_xmit(struct sk_buff * skb, struct net_device * dev) { net_local * lp = netdev_priv(dev); unsigned long flags; #ifdef DEBUG_TX_TRACE printk(KERN_DEBUG "%s: ->wavelan_packet_xmit(0x%X)\n", dev->name, (unsigned) skb); #endif /* * Block a timer-based transmit from overlapping a previous transmit. * In other words, prevent reentering this routine. */ netif_stop_queue(dev); /* If somebody has asked to reconfigure the controller, * we can do it now */ if(lp->reconfig_82593) { spin_lock_irqsave(&lp->spinlock, flags); /* Disable interrupts */ wv_82593_config(dev); spin_unlock_irqrestore(&lp->spinlock, flags); /* Re-enable interrupts */ /* Note : the configure procedure was totally synchronous, * so the Tx buffer is now free */ } #ifdef DEBUG_TX_ERROR if (skb->next) printk(KERN_INFO "skb has next\n"); #endif /* Check if we need some padding */ /* Note : on wireless the propagation time is in the order of 1us, * and we don't have the Ethernet specific requirement of beeing * able to detect collisions, therefore in theory we don't really * need to pad. Jean II */ if (skb_padto(skb, ETH_ZLEN)) return 0; wv_packet_write(dev, skb->data, skb->len); dev_kfree_skb(skb); #ifdef DEBUG_TX_TRACE printk(KERN_DEBUG "%s: <-wavelan_packet_xmit()\n", dev->name); #endif return(0); } /********************** HARDWARE CONFIGURATION **********************/ /* * This part do the real job of starting and configuring the hardware. */ /*------------------------------------------------------------------*/ /* * Routine to initialize the Modem Management Controller. * (called by wv_hw_config()) */ static int wv_mmc_init(struct net_device * dev) { unsigned int base = dev->base_addr; psa_t psa; mmw_t m; int configured; int i; /* Loop counter */ #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_mmc_init()\n", dev->name); #endif /* Read the parameter storage area */ psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa)); /* * Check the first three octets of the MAC addr for the manufacturer's code. * Note: If you get the error message below, you've got a * non-NCR/AT&T/Lucent PCMCIA cards, see wavelan_cs.h for detail on * how to configure your card... */ for (i = 0; i < ARRAY_SIZE(MAC_ADDRESSES); i++) if ((psa.psa_univ_mac_addr[0] == MAC_ADDRESSES[i][0]) && (psa.psa_univ_mac_addr[1] == MAC_ADDRESSES[i][1]) && (psa.psa_univ_mac_addr[2] == MAC_ADDRESSES[i][2])) break; /* If we have not found it... */ if (i == ARRAY_SIZE(MAC_ADDRESSES)) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_WARNING "%s: wv_mmc_init(): Invalid MAC address: %02X:%02X:%02X:...\n", dev->name, psa.psa_univ_mac_addr[0], psa.psa_univ_mac_addr[1], psa.psa_univ_mac_addr[2]); #endif return FALSE; } /* Get the MAC address */ memcpy(&dev->dev_addr[0], &psa.psa_univ_mac_addr[0], WAVELAN_ADDR_SIZE); #ifdef USE_PSA_CONFIG configured = psa.psa_conf_status & 1; #else configured = 0; #endif /* Is the PSA is not configured */ if(!configured) { /* User will be able to configure NWID after (with iwconfig) */ psa.psa_nwid[0] = 0; psa.psa_nwid[1] = 0; /* As NWID is not set : no NWID checking */ psa.psa_nwid_select = 0; /* Disable encryption */ psa.psa_encryption_select = 0; /* Set to standard values * 0x04 for AT, * 0x01 for MCA, * 0x04 for PCMCIA and 2.00 card (AT&T 407-024689/E document) */ if (psa.psa_comp_number & 1) psa.psa_thr_pre_set = 0x01; else psa.psa_thr_pre_set = 0x04; psa.psa_quality_thr = 0x03; /* It is configured */ psa.psa_conf_status |= 1; #ifdef USE_PSA_CONFIG /* Write the psa */ psa_write(dev, (char *)psa.psa_nwid - (char *)&psa, (unsigned char *)psa.psa_nwid, 4); psa_write(dev, (char *)&psa.psa_thr_pre_set - (char *)&psa, (unsigned char *)&psa.psa_thr_pre_set, 1); psa_write(dev, (char *)&psa.psa_quality_thr - (char *)&psa, (unsigned char *)&psa.psa_quality_thr, 1); psa_write(dev, (char *)&psa.psa_conf_status - (char *)&psa, (unsigned char *)&psa.psa_conf_status, 1); /* update the Wavelan checksum */ update_psa_checksum(dev); #endif /* USE_PSA_CONFIG */ } /* Zero the mmc structure */ memset(&m, 0x00, sizeof(m)); /* Copy PSA info to the mmc */ m.mmw_netw_id_l = psa.psa_nwid[1]; m.mmw_netw_id_h = psa.psa_nwid[0]; if(psa.psa_nwid_select & 1) m.mmw_loopt_sel = 0x00; else m.mmw_loopt_sel = MMW_LOOPT_SEL_DIS_NWID; memcpy(&m.mmw_encr_key, &psa.psa_encryption_key, sizeof(m.mmw_encr_key)); if(psa.psa_encryption_select) m.mmw_encr_enable = MMW_ENCR_ENABLE_EN | MMW_ENCR_ENABLE_MODE; else m.mmw_encr_enable = 0; m.mmw_thr_pre_set = psa.psa_thr_pre_set & 0x3F; m.mmw_quality_thr = psa.psa_quality_thr & 0x0F; /* * Set default modem control parameters. * See NCR document 407-0024326 Rev. A. */ m.mmw_jabber_enable = 0x01; m.mmw_anten_sel = MMW_ANTEN_SEL_ALG_EN; m.mmw_ifs = 0x20; m.mmw_mod_delay = 0x04; m.mmw_jam_time = 0x38; m.mmw_des_io_invert = 0; m.mmw_freeze = 0; m.mmw_decay_prm = 0; m.mmw_decay_updat_prm = 0; /* Write all info to mmc */ mmc_write(base, 0, (u_char *)&m, sizeof(m)); /* The following code start the modem of the 2.00 frequency * selectable cards at power on. It's not strictly needed for the * following boots... * The original patch was by Joe Finney for the PCMCIA driver, but * I've cleaned it a bit and add documentation. * Thanks to Loeke Brederveld from Lucent for the info. */ /* Attempt to recognise 2.00 cards (2.4 GHz frequency selectable) * (does it work for everybody ? - especially old cards...) */ /* Note : WFREQSEL verify that it is able to read from EEprom * a sensible frequency (address 0x00) + that MMR_FEE_STATUS_ID * is 0xA (Xilinx version) or 0xB (Ariadne version). * My test is more crude but do work... */ if(!(mmc_in(base, mmroff(0, mmr_fee_status)) & (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) { /* We must download the frequency parameters to the * synthetisers (from the EEprom - area 1) * Note : as the EEprom is auto decremented, we set the end * if the area... */ m.mmw_fee_addr = 0x0F; m.mmw_fee_ctrl = MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD; mmc_write(base, (char *)&m.mmw_fee_ctrl - (char *)&m, (unsigned char *)&m.mmw_fee_ctrl, 2); /* Wait until the download is finished */ fee_wait(base, 100, 100); #ifdef DEBUG_CONFIG_INFO /* The frequency was in the last word downloaded... */ mmc_read(base, (char *)&m.mmw_fee_data_l - (char *)&m, (unsigned char *)&m.mmw_fee_data_l, 2); /* Print some info for the user */ printk(KERN_DEBUG "%s: Wavelan 2.00 recognised (frequency select) : Current frequency = %ld\n", dev->name, ((m.mmw_fee_data_h << 4) | (m.mmw_fee_data_l >> 4)) * 5 / 2 + 24000L); #endif /* We must now download the power adjust value (gain) to * the synthetisers (from the EEprom - area 7 - DAC) */ m.mmw_fee_addr = 0x61; m.mmw_fee_ctrl = MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD; mmc_write(base, (char *)&m.mmw_fee_ctrl - (char *)&m, (unsigned char *)&m.mmw_fee_ctrl, 2); /* Wait until the download is finished */ } /* if 2.00 card */ #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_mmc_init()\n", dev->name); #endif return TRUE; } /*------------------------------------------------------------------*/ /* * Routine to gracefully turn off reception, and wait for any commands * to complete. * (called in wv_ru_start() and wavelan_close() and wavelan_event()) */ static int wv_ru_stop(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); unsigned long flags; int status; int spin; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_ru_stop()\n", dev->name); #endif spin_lock_irqsave(&lp->spinlock, flags); /* First, send the LAN controller a stop receive command */ wv_82593_cmd(dev, "wv_graceful_shutdown(): stop-rcv", OP0_STOP_RCV, SR0_NO_RESULT); /* Then, spin until the receive unit goes idle */ spin = 300; do { udelay(10); outb(OP0_NOP | CR0_STATUS_3, LCCR(base)); status = inb(LCSR(base)); } while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_IDLE) && (spin-- > 0)); /* Now, spin until the chip finishes executing its current command */ do { udelay(10); outb(OP0_NOP | CR0_STATUS_3, LCCR(base)); status = inb(LCSR(base)); } while(((status & SR3_EXEC_STATE_MASK) != SR3_EXEC_IDLE) && (spin-- > 0)); spin_unlock_irqrestore(&lp->spinlock, flags); /* If there was a problem */ if(spin <= 0) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_INFO "%s: wv_ru_stop(): The chip doesn't want to stop...\n", dev->name); #endif return FALSE; } #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_ru_stop()\n", dev->name); #endif return TRUE; } /* wv_ru_stop */ /*------------------------------------------------------------------*/ /* * This routine starts the receive unit running. First, it checks if * the card is actually ready. Then the card is instructed to receive * packets again. * (called in wv_hw_reset() & wavelan_open()) */ static int wv_ru_start(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); unsigned long flags; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_ru_start()\n", dev->name); #endif /* * We need to start from a quiescent state. To do so, we could check * if the card is already running, but instead we just try to shut * it down. First, we disable reception (in case it was already enabled). */ if(!wv_ru_stop(dev)) return FALSE; spin_lock_irqsave(&lp->spinlock, flags); /* Now we know that no command is being executed. */ /* Set the receive frame pointer and stop pointer */ lp->rfp = 0; outb(OP0_SWIT_TO_PORT_1 | CR0_CHNL, LCCR(base)); /* Reset ring management. This sets the receive frame pointer to 1 */ outb(OP1_RESET_RING_MNGMT, LCCR(base)); #if 0 /* XXX the i82593 manual page 6-4 seems to indicate that the stop register should be set as below */ /* outb(CR1_STOP_REG_UPDATE|((RX_SIZE - 0x40)>> RX_SIZE_SHIFT),LCCR(base));*/ #elif 0 /* but I set it 0 instead */ lp->stop = 0; #else /* but I set it to 3 bytes per packet less than 8K */ lp->stop = (0 + RX_SIZE - ((RX_SIZE / 64) * 3)) % RX_SIZE; #endif outb(CR1_STOP_REG_UPDATE | (lp->stop >> RX_SIZE_SHIFT), LCCR(base)); outb(OP1_INT_ENABLE, LCCR(base)); outb(OP1_SWIT_TO_PORT_0, LCCR(base)); /* Reset receive DMA pointer */ hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET); hacr_write_slow(base, HACR_DEFAULT); /* Receive DMA on channel 1 */ wv_82593_cmd(dev, "wv_ru_start(): rcv-enable", CR0_CHNL | OP0_RCV_ENABLE, SR0_NO_RESULT); #ifdef DEBUG_I82593_SHOW { int status; int opri; int spin = 10000; /* spin until the chip starts receiving */ do { outb(OP0_NOP | CR0_STATUS_3, LCCR(base)); status = inb(LCSR(base)); if(spin-- <= 0) break; } while(((status & SR3_RCV_STATE_MASK) != SR3_RCV_ACTIVE) && ((status & SR3_RCV_STATE_MASK) != SR3_RCV_READY)); printk(KERN_DEBUG "rcv status is 0x%x [i:%d]\n", (status & SR3_RCV_STATE_MASK), i); } #endif spin_unlock_irqrestore(&lp->spinlock, flags); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_ru_start()\n", dev->name); #endif return TRUE; } /*------------------------------------------------------------------*/ /* * This routine does a standard config of the WaveLAN controller (i82593). * In the ISA driver, this is integrated in wavelan_hardware_reset() * (called by wv_hw_config(), wv_82593_reconfig() & wavelan_packet_xmit()) */ static int wv_82593_config(struct net_device * dev) { unsigned int base = dev->base_addr; net_local * lp = netdev_priv(dev); struct i82593_conf_block cfblk; int ret = TRUE; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_82593_config()\n", dev->name); #endif /* Create & fill i82593 config block * * Now conform to Wavelan document WCIN085B */ memset(&cfblk, 0x00, sizeof(struct i82593_conf_block)); cfblk.d6mod = FALSE; /* Run in i82593 advanced mode */ cfblk.fifo_limit = 5; /* = 56 B rx and 40 B tx fifo thresholds */ cfblk.forgnesi = FALSE; /* 0=82C501, 1=AMD7992B compatibility */ cfblk.fifo_32 = 1; cfblk.throttle_enb = FALSE; cfblk.contin = TRUE; /* enable continuous mode */ cfblk.cntrxint = FALSE; /* enable continuous mode receive interrupts */ cfblk.addr_len = WAVELAN_ADDR_SIZE; cfblk.acloc = TRUE; /* Disable source addr insertion by i82593 */ cfblk.preamb_len = 0; /* 2 bytes preamble (SFD) */ cfblk.loopback = FALSE; cfblk.lin_prio = 0; /* conform to 802.3 backoff algorithm */ cfblk.exp_prio = 5; /* conform to 802.3 backoff algorithm */ cfblk.bof_met = 1; /* conform to 802.3 backoff algorithm */ cfblk.ifrm_spc = 0x20 >> 4; /* 32 bit times interframe spacing */ cfblk.slottim_low = 0x20 >> 5; /* 32 bit times slot time */ cfblk.slottim_hi = 0x0; cfblk.max_retr = 15; cfblk.prmisc = ((lp->promiscuous) ? TRUE: FALSE); /* Promiscuous mode */ cfblk.bc_dis = FALSE; /* Enable broadcast reception */ cfblk.crs_1 = TRUE; /* Transmit without carrier sense */ cfblk.nocrc_ins = FALSE; /* i82593 generates CRC */ cfblk.crc_1632 = FALSE; /* 32-bit Autodin-II CRC */ cfblk.crs_cdt = FALSE; /* CD not to be interpreted as CS */ cfblk.cs_filter = 0; /* CS is recognized immediately */ cfblk.crs_src = FALSE; /* External carrier sense */ cfblk.cd_filter = 0; /* CD is recognized immediately */ cfblk.min_fr_len = ETH_ZLEN >> 2; /* Minimum frame length 64 bytes */ cfblk.lng_typ = FALSE; /* Length field > 1500 = type field */ cfblk.lng_fld = TRUE; /* Disable 802.3 length field check */ cfblk.rxcrc_xf = TRUE; /* Don't transfer CRC to memory */ cfblk.artx = TRUE; /* Disable automatic retransmission */ cfblk.sarec = TRUE; /* Disable source addr trig of CD */ cfblk.tx_jabber = TRUE; /* Disable jabber jam sequence */ cfblk.hash_1 = FALSE; /* Use bits 0-5 in mc address hash */ cfblk.lbpkpol = TRUE; /* Loopback pin active high */ cfblk.fdx = FALSE; /* Disable full duplex operation */ cfblk.dummy_6 = 0x3f; /* all ones */ cfblk.mult_ia = FALSE; /* No multiple individual addresses */ cfblk.dis_bof = FALSE; /* Disable the backoff algorithm ?! */ cfblk.dummy_1 = TRUE; /* set to 1 */ cfblk.tx_ifs_retrig = 3; /* Hmm... Disabled */ #ifdef MULTICAST_ALL cfblk.mc_all = (lp->allmulticast ? TRUE: FALSE); /* Allow all multicasts */ #else cfblk.mc_all = FALSE; /* No multicast all mode */ #endif cfblk.rcv_mon = 0; /* Monitor mode disabled */ cfblk.frag_acpt = TRUE; /* Do not accept fragments */ cfblk.tstrttrs = FALSE; /* No start transmission threshold */ cfblk.fretx = TRUE; /* FIFO automatic retransmission */ cfblk.syncrqs = FALSE; /* Synchronous DRQ deassertion... */ cfblk.sttlen = TRUE; /* 6 byte status registers */ cfblk.rx_eop = TRUE; /* Signal EOP on packet reception */ cfblk.tx_eop = TRUE; /* Signal EOP on packet transmission */ cfblk.rbuf_size = RX_SIZE>>11; /* Set receive buffer size */ cfblk.rcvstop = TRUE; /* Enable Receive Stop Register */ #ifdef DEBUG_I82593_SHOW { u_char *c = (u_char *) &cfblk; int i; printk(KERN_DEBUG "wavelan_cs: config block:"); for(i = 0; i < sizeof(struct i82593_conf_block); i++,c++) { if((i % 16) == 0) printk("\n" KERN_DEBUG); printk("%02x ", *c); } printk("\n"); } #endif /* Copy the config block to the i82593 */ outb(TX_BASE & 0xff, PIORL(base)); outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base)); outb(sizeof(struct i82593_conf_block) & 0xff, PIOP(base)); /* lsb */ outb(sizeof(struct i82593_conf_block) >> 8, PIOP(base)); /* msb */ outsb(PIOP(base), (char *) &cfblk, sizeof(struct i82593_conf_block)); /* reset transmit DMA pointer */ hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET); hacr_write(base, HACR_DEFAULT); if(!wv_82593_cmd(dev, "wv_82593_config(): configure", OP0_CONFIGURE, SR0_CONFIGURE_DONE)) ret = FALSE; /* Initialize adapter's ethernet MAC address */ outb(TX_BASE & 0xff, PIORL(base)); outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base)); outb(WAVELAN_ADDR_SIZE, PIOP(base)); /* byte count lsb */ outb(0, PIOP(base)); /* byte count msb */ outsb(PIOP(base), &dev->dev_addr[0], WAVELAN_ADDR_SIZE); /* reset transmit DMA pointer */ hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET); hacr_write(base, HACR_DEFAULT); if(!wv_82593_cmd(dev, "wv_82593_config(): ia-setup", OP0_IA_SETUP, SR0_IA_SETUP_DONE)) ret = FALSE; #ifdef WAVELAN_ROAMING /* If roaming is enabled, join the "Beacon Request" multicast group... */ /* But only if it's not in there already! */ if(do_roaming) dev_mc_add(dev,WAVELAN_BEACON_ADDRESS, WAVELAN_ADDR_SIZE, 1); #endif /* WAVELAN_ROAMING */ /* If any multicast address to set */ if(lp->mc_count) { struct dev_mc_list * dmi; int addrs_len = WAVELAN_ADDR_SIZE * lp->mc_count; #ifdef DEBUG_CONFIG_INFO printk(KERN_DEBUG "%s: wv_hw_config(): set %d multicast addresses:\n", dev->name, lp->mc_count); for(dmi=dev->mc_list; dmi; dmi=dmi->next) printk(KERN_DEBUG " %pM\n", dmi->dmi_addr); #endif /* Initialize adapter's ethernet multicast addresses */ outb(TX_BASE & 0xff, PIORL(base)); outb(((TX_BASE >> 8) & PIORH_MASK) | PIORH_SEL_TX, PIORH(base)); outb(addrs_len & 0xff, PIOP(base)); /* byte count lsb */ outb((addrs_len >> 8), PIOP(base)); /* byte count msb */ for(dmi=dev->mc_list; dmi; dmi=dmi->next) outsb(PIOP(base), dmi->dmi_addr, dmi->dmi_addrlen); /* reset transmit DMA pointer */ hacr_write_slow(base, HACR_PWR_STAT | HACR_TX_DMA_RESET); hacr_write(base, HACR_DEFAULT); if(!wv_82593_cmd(dev, "wv_82593_config(): mc-setup", OP0_MC_SETUP, SR0_MC_SETUP_DONE)) ret = FALSE; lp->mc_count = dev->mc_count; /* remember to avoid repeated reset */ } /* Job done, clear the flag */ lp->reconfig_82593 = FALSE; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_82593_config()\n", dev->name); #endif return(ret); } /*------------------------------------------------------------------*/ /* * Read the Access Configuration Register, perform a software reset, * and then re-enable the card's software. * * If I understand correctly : reset the pcmcia interface of the * wavelan. * (called by wv_config()) */ static int wv_pcmcia_reset(struct net_device * dev) { int i; conf_reg_t reg = { 0, CS_READ, CISREG_COR, 0 }; struct pcmcia_device * link = ((net_local *)netdev_priv(dev))->link; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_pcmcia_reset()\n", dev->name); #endif i = pcmcia_access_configuration_register(link, ®); if (i != 0) { cs_error(link, AccessConfigurationRegister, i); return FALSE; } #ifdef DEBUG_CONFIG_INFO printk(KERN_DEBUG "%s: wavelan_pcmcia_reset(): Config reg is 0x%x\n", dev->name, (u_int) reg.Value); #endif reg.Action = CS_WRITE; reg.Value = reg.Value | COR_SW_RESET; i = pcmcia_access_configuration_register(link, ®); if (i != 0) { cs_error(link, AccessConfigurationRegister, i); return FALSE; } reg.Action = CS_WRITE; reg.Value = COR_LEVEL_IRQ | COR_CONFIG; i = pcmcia_access_configuration_register(link, ®); if (i != 0) { cs_error(link, AccessConfigurationRegister, i); return FALSE; } #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_pcmcia_reset()\n", dev->name); #endif return TRUE; } /*------------------------------------------------------------------*/ /* * wavelan_hw_config() is called after a CARD_INSERTION event is * received, to configure the wavelan hardware. * Note that the reception will be enabled in wavelan->open(), so the * device is configured but idle... * Performs the following actions: * 1. A pcmcia software reset (using wv_pcmcia_reset()) * 2. A power reset (reset DMA) * 3. Reset the LAN controller * 4. Initialize the radio modem (using wv_mmc_init) * 5. Configure LAN controller (using wv_82593_config) * 6. Perform a diagnostic on the LAN controller * (called by wavelan_event() & wv_hw_reset()) */ static int wv_hw_config(struct net_device * dev) { net_local * lp = netdev_priv(dev); unsigned int base = dev->base_addr; unsigned long flags; int ret = FALSE; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_hw_config()\n", dev->name); #endif /* compile-time check the sizes of structures */ BUILD_BUG_ON(sizeof(psa_t) != PSA_SIZE); BUILD_BUG_ON(sizeof(mmw_t) != MMW_SIZE); BUILD_BUG_ON(sizeof(mmr_t) != MMR_SIZE); /* Reset the pcmcia interface */ if(wv_pcmcia_reset(dev) == FALSE) return FALSE; /* Disable interrupts */ spin_lock_irqsave(&lp->spinlock, flags); /* Disguised goto ;-) */ do { /* Power UP the module + reset the modem + reset host adapter * (in fact, reset DMA channels) */ hacr_write_slow(base, HACR_RESET); hacr_write(base, HACR_DEFAULT); /* Check if the module has been powered up... */ if(hasr_read(base) & HASR_NO_CLK) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_WARNING "%s: wv_hw_config(): modem not connected or not a wavelan card\n", dev->name); #endif break; } /* initialize the modem */ if(wv_mmc_init(dev) == FALSE) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_WARNING "%s: wv_hw_config(): Can't configure the modem\n", dev->name); #endif break; } /* reset the LAN controller (i82593) */ outb(OP0_RESET, LCCR(base)); mdelay(1); /* A bit crude ! */ /* Initialize the LAN controller */ if(wv_82593_config(dev) == FALSE) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_INFO "%s: wv_hw_config(): i82593 init failed\n", dev->name); #endif break; } /* Diagnostic */ if(wv_diag(dev) == FALSE) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_INFO "%s: wv_hw_config(): i82593 diagnostic failed\n", dev->name); #endif break; } /* * insert code for loopback test here */ /* The device is now configured */ lp->configured = 1; ret = TRUE; } while(0); /* Re-enable interrupts */ spin_unlock_irqrestore(&lp->spinlock, flags); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_hw_config()\n", dev->name); #endif return(ret); } /*------------------------------------------------------------------*/ /* * Totally reset the wavelan and restart it. * Performs the following actions: * 1. Call wv_hw_config() * 2. Start the LAN controller's receive unit * (called by wavelan_event(), wavelan_watchdog() and wavelan_open()) */ static void wv_hw_reset(struct net_device * dev) { net_local * lp = netdev_priv(dev); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: ->wv_hw_reset()\n", dev->name); #endif lp->nresets++; lp->configured = 0; /* Call wv_hw_config() for most of the reset & init stuff */ if(wv_hw_config(dev) == FALSE) return; /* start receive unit */ wv_ru_start(dev); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <-wv_hw_reset()\n", dev->name); #endif } /*------------------------------------------------------------------*/ /* * wv_pcmcia_config() is called after a CARD_INSERTION event is * received, to configure the PCMCIA socket, and to make the ethernet * device available to the system. * (called by wavelan_event()) */ static int wv_pcmcia_config(struct pcmcia_device * link) { struct net_device * dev = (struct net_device *) link->priv; int i; win_req_t req; memreq_t mem; net_local * lp = netdev_priv(dev); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "->wv_pcmcia_config(0x%p)\n", link); #endif do { i = pcmcia_request_io(link, &link->io); if (i != 0) { cs_error(link, RequestIO, i); break; } /* * Now allocate an interrupt line. Note that this does not * actually assign a handler to the interrupt. */ i = pcmcia_request_irq(link, &link->irq); if (i != 0) { cs_error(link, RequestIRQ, i); break; } /* * This actually configures the PCMCIA socket -- setting up * the I/O windows and the interrupt mapping. */ link->conf.ConfigIndex = 1; i = pcmcia_request_configuration(link, &link->conf); if (i != 0) { cs_error(link, RequestConfiguration, i); break; } /* * Allocate a small memory window. Note that the struct pcmcia_device * structure provides space for one window handle -- if your * device needs several windows, you'll need to keep track of * the handles in your private data structure, link->priv. */ req.Attributes = WIN_DATA_WIDTH_8|WIN_MEMORY_TYPE_AM|WIN_ENABLE; req.Base = req.Size = 0; req.AccessSpeed = mem_speed; i = pcmcia_request_window(&link, &req, &link->win); if (i != 0) { cs_error(link, RequestWindow, i); break; } lp->mem = ioremap(req.Base, req.Size); dev->mem_start = (u_long)lp->mem; dev->mem_end = dev->mem_start + req.Size; mem.CardOffset = 0; mem.Page = 0; i = pcmcia_map_mem_page(link->win, &mem); if (i != 0) { cs_error(link, MapMemPage, i); break; } /* Feed device with this info... */ dev->irq = link->irq.AssignedIRQ; dev->base_addr = link->io.BasePort1; netif_start_queue(dev); #ifdef DEBUG_CONFIG_INFO printk(KERN_DEBUG "wv_pcmcia_config: MEMSTART %p IRQ %d IOPORT 0x%x\n", lp->mem, dev->irq, (u_int) dev->base_addr); #endif SET_NETDEV_DEV(dev, &handle_to_dev(link)); i = register_netdev(dev); if(i != 0) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_INFO "wv_pcmcia_config(): register_netdev() failed\n"); #endif break; } } while(0); /* Humm... Disguised goto !!! */ /* If any step failed, release any partially configured state */ if(i != 0) { wv_pcmcia_release(link); return FALSE; } strcpy(((net_local *) netdev_priv(dev))->node.dev_name, dev->name); link->dev_node = &((net_local *) netdev_priv(dev))->node; #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "<-wv_pcmcia_config()\n"); #endif return TRUE; } /*------------------------------------------------------------------*/ /* * After a card is removed, wv_pcmcia_release() will unregister the net * device, and release the PCMCIA configuration. If the device is * still open, this will be postponed until it is closed. */ static void wv_pcmcia_release(struct pcmcia_device *link) { struct net_device * dev = (struct net_device *) link->priv; net_local * lp = netdev_priv(dev); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: -> wv_pcmcia_release(0x%p)\n", dev->name, link); #endif iounmap(lp->mem); pcmcia_disable_device(link); #ifdef DEBUG_CONFIG_TRACE printk(KERN_DEBUG "%s: <- wv_pcmcia_release()\n", dev->name); #endif } /************************ INTERRUPT HANDLING ************************/ /* * This function is the interrupt handler for the WaveLAN card. This * routine will be called whenever: * 1. A packet is received. * 2. A packet has successfully been transferred and the unit is * ready to transmit another packet. * 3. A command has completed execution. */ static irqreturn_t wavelan_interrupt(int irq, void * dev_id) { struct net_device * dev = dev_id; net_local * lp; unsigned int base; int status0; u_int tx_status; #ifdef DEBUG_INTERRUPT_TRACE printk(KERN_DEBUG "%s: ->wavelan_interrupt()\n", dev->name); #endif lp = netdev_priv(dev); base = dev->base_addr; #ifdef DEBUG_INTERRUPT_INFO /* Check state of our spinlock (it should be cleared) */ if(spin_is_locked(&lp->spinlock)) printk(KERN_DEBUG "%s: wavelan_interrupt(): spinlock is already locked !!!\n", dev->name); #endif /* Prevent reentrancy. We need to do that because we may have * multiple interrupt handler running concurently. * It is safe because interrupts are disabled before aquiring * the spinlock. */ spin_lock(&lp->spinlock); /* Treat all pending interrupts */ while(1) { /* ---------------- INTERRUPT CHECKING ---------------- */ /* * Look for the interrupt and verify the validity */ outb(CR0_STATUS_0 | OP0_NOP, LCCR(base)); status0 = inb(LCSR(base)); #ifdef DEBUG_INTERRUPT_INFO printk(KERN_DEBUG "status0 0x%x [%s => 0x%x]", status0, (status0&SR0_INTERRUPT)?"int":"no int",status0&~SR0_INTERRUPT); if(status0&SR0_INTERRUPT) { printk(" [%s => %d]\n", (status0 & SR0_CHNL) ? "chnl" : ((status0 & SR0_EXECUTION) ? "cmd" : ((status0 & SR0_RECEPTION) ? "recv" : "unknown")), (status0 & SR0_EVENT_MASK)); } else printk("\n"); #endif /* Return if no actual interrupt from i82593 (normal exit) */ if(!(status0 & SR0_INTERRUPT)) break; /* If interrupt is both Rx and Tx or none... * This code in fact is there to catch the spurious interrupt * when you remove the wavelan pcmcia card from the socket */ if(((status0 & SR0_BOTH_RX_TX) == SR0_BOTH_RX_TX) || ((status0 & SR0_BOTH_RX_TX) == 0x0)) { #ifdef DEBUG_INTERRUPT_INFO printk(KERN_INFO "%s: wv_interrupt(): bogus interrupt (or from dead card) : %X\n", dev->name, status0); #endif /* Acknowledge the interrupt */ outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); break; } /* ----------------- RECEIVING PACKET ----------------- */ /* * When the wavelan signal the reception of a new packet, * we call wv_packet_rcv() to copy if from the buffer and * send it to NET3 */ if(status0 & SR0_RECEPTION) { #ifdef DEBUG_INTERRUPT_INFO printk(KERN_DEBUG "%s: wv_interrupt(): receive\n", dev->name); #endif if((status0 & SR0_EVENT_MASK) == SR0_STOP_REG_HIT) { #ifdef DEBUG_INTERRUPT_ERROR printk(KERN_INFO "%s: wv_interrupt(): receive buffer overflow\n", dev->name); #endif lp->stats.rx_over_errors++; lp->overrunning = 1; } /* Get the packet */ wv_packet_rcv(dev); lp->overrunning = 0; /* Acknowledge the interrupt */ outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); continue; } /* ---------------- COMMAND COMPLETION ---------------- */ /* * Interrupts issued when the i82593 has completed a command. * Most likely : transmission done */ /* If a transmission has been done */ if((status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_DONE || (status0 & SR0_EVENT_MASK) == SR0_RETRANSMIT_DONE || (status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_NO_CRC_DONE) { #ifdef DEBUG_TX_ERROR if((status0 & SR0_EVENT_MASK) == SR0_TRANSMIT_NO_CRC_DONE) printk(KERN_INFO "%s: wv_interrupt(): packet transmitted without CRC.\n", dev->name); #endif /* Get transmission status */ tx_status = inb(LCSR(base)); tx_status |= (inb(LCSR(base)) << 8); #ifdef DEBUG_INTERRUPT_INFO printk(KERN_DEBUG "%s: wv_interrupt(): transmission done\n", dev->name); { u_int rcv_bytes; u_char status3; rcv_bytes = inb(LCSR(base)); rcv_bytes |= (inb(LCSR(base)) << 8); status3 = inb(LCSR(base)); printk(KERN_DEBUG "tx_status 0x%02x rcv_bytes 0x%02x status3 0x%x\n", tx_status, rcv_bytes, (u_int) status3); } #endif /* Check for possible errors */ if((tx_status & TX_OK) != TX_OK) { lp->stats.tx_errors++; if(tx_status & TX_FRTL) { #ifdef DEBUG_TX_ERROR printk(KERN_INFO "%s: wv_interrupt(): frame too long\n", dev->name); #endif } if(tx_status & TX_UND_RUN) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): DMA underrun\n", dev->name); #endif lp->stats.tx_aborted_errors++; } if(tx_status & TX_LOST_CTS) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): no CTS\n", dev->name); #endif lp->stats.tx_carrier_errors++; } if(tx_status & TX_LOST_CRS) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): no carrier\n", dev->name); #endif lp->stats.tx_carrier_errors++; } if(tx_status & TX_HRT_BEAT) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): heart beat\n", dev->name); #endif lp->stats.tx_heartbeat_errors++; } if(tx_status & TX_DEFER) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): channel jammed\n", dev->name); #endif } /* Ignore late collisions since they're more likely to happen * here (the WaveLAN design prevents the LAN controller from * receiving while it is transmitting). We take action only when * the maximum retransmit attempts is exceeded. */ if(tx_status & TX_COLL) { if(tx_status & TX_MAX_COL) { #ifdef DEBUG_TX_FAIL printk(KERN_DEBUG "%s: wv_interrupt(): channel congestion\n", dev->name); #endif if(!(tx_status & TX_NCOL_MASK)) { lp->stats.collisions += 0x10; } } } } /* if(!(tx_status & TX_OK)) */ lp->stats.collisions += (tx_status & TX_NCOL_MASK); lp->stats.tx_packets++; netif_wake_queue(dev); outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); /* Acknowledge the interrupt */ } else /* if interrupt = transmit done or retransmit done */ { #ifdef DEBUG_INTERRUPT_ERROR printk(KERN_INFO "wavelan_cs: unknown interrupt, status0 = %02x\n", status0); #endif outb(CR0_INT_ACK | OP0_NOP, LCCR(base)); /* Acknowledge the interrupt */ } } /* while(1) */ spin_unlock(&lp->spinlock); #ifdef DEBUG_INTERRUPT_TRACE printk(KERN_DEBUG "%s: <-wavelan_interrupt()\n", dev->name); #endif /* We always return IRQ_HANDLED, because we will receive empty * interrupts under normal operations. Anyway, it doesn't matter * as we are dealing with an ISA interrupt that can't be shared. * * Explanation : under heavy receive, the following happens : * ->wavelan_interrupt() * (status0 & SR0_INTERRUPT) != 0 * ->wv_packet_rcv() * (status0 & SR0_INTERRUPT) != 0 * ->wv_packet_rcv() * (status0 & SR0_INTERRUPT) == 0 // i.e. no more event * <-wavelan_interrupt() * ->wavelan_interrupt() * (status0 & SR0_INTERRUPT) == 0 // i.e. empty interrupt * <-wavelan_interrupt() * Jean II */ return IRQ_HANDLED; } /* wv_interrupt */ /*------------------------------------------------------------------*/ /* * Watchdog: when we start a transmission, a timer is set for us in the * kernel. If the transmission completes, this timer is disabled. If * the timer expires, we are called and we try to unlock the hardware. * * Note : This watchdog is move clever than the one in the ISA driver, * because it try to abort the current command before reseting * everything... * On the other hand, it's a bit simpler, because we don't have to * deal with the multiple Tx buffers... */ static void wavelan_watchdog(struct net_device * dev) { net_local * lp = netdev_priv(dev); unsigned int base = dev->base_addr; unsigned long flags; int aborted = FALSE; #ifdef DEBUG_INTERRUPT_TRACE printk(KERN_DEBUG "%s: ->wavelan_watchdog()\n", dev->name); #endif #ifdef DEBUG_INTERRUPT_ERROR printk(KERN_INFO "%s: wavelan_watchdog: watchdog timer expired\n", dev->name); #endif spin_lock_irqsave(&lp->spinlock, flags); /* Ask to abort the current command */ outb(OP0_ABORT, LCCR(base)); /* Wait for the end of the command (a bit hackish) */ if(wv_82593_cmd(dev, "wavelan_watchdog(): abort", OP0_NOP | CR0_STATUS_3, SR0_EXECUTION_ABORTED)) aborted = TRUE; /* Release spinlock here so that wv_hw_reset() can grab it */ spin_unlock_irqrestore(&lp->spinlock, flags); /* Check if we were successful in aborting it */ if(!aborted) { /* It seem that it wasn't enough */ #ifdef DEBUG_INTERRUPT_ERROR printk(KERN_INFO "%s: wavelan_watchdog: abort failed, trying reset\n", dev->name); #endif wv_hw_reset(dev); } #ifdef DEBUG_PSA_SHOW { psa_t psa; psa_read(dev, 0, (unsigned char *) &psa, sizeof(psa)); wv_psa_show(&psa); } #endif #ifdef DEBUG_MMC_SHOW wv_mmc_show(dev); #endif #ifdef DEBUG_I82593_SHOW wv_ru_show(dev); #endif /* We are no more waiting for something... */ netif_wake_queue(dev); #ifdef DEBUG_INTERRUPT_TRACE printk(KERN_DEBUG "%s: <-wavelan_watchdog()\n", dev->name); #endif } /********************* CONFIGURATION CALLBACKS *********************/ /* * Here are the functions called by the pcmcia package (cardmgr) and * linux networking (NET3) for initialization, configuration and * deinstallations of the Wavelan Pcmcia Hardware. */ /*------------------------------------------------------------------*/ /* * Configure and start up the WaveLAN PCMCIA adaptor. * Called by NET3 when it "open" the device. */ static int wavelan_open(struct net_device * dev) { net_local * lp = netdev_priv(dev); struct pcmcia_device * link = lp->link; unsigned int base = dev->base_addr; #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "%s: ->wavelan_open(dev=0x%x)\n", dev->name, (unsigned int) dev); #endif /* Check if the modem is powered up (wavelan_close() power it down */ if(hasr_read(base) & HASR_NO_CLK) { /* Power up (power up time is 250us) */ hacr_write(base, HACR_DEFAULT); /* Check if the module has been powered up... */ if(hasr_read(base) & HASR_NO_CLK) { #ifdef DEBUG_CONFIG_ERRORS printk(KERN_WARNING "%s: wavelan_open(): modem not connected\n", dev->name); #endif return FALSE; } } /* Start reception and declare the driver ready */ if(!lp->configured) return FALSE; if(!wv_ru_start(dev)) wv_hw_reset(dev); /* If problem : reset */ netif_start_queue(dev); /* Mark the device as used */ link->open++; #ifdef WAVELAN_ROAMING if(do_roaming) wv_roam_init(dev); #endif /* WAVELAN_ROAMING */ #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "%s: <-wavelan_open()\n", dev->name); #endif return 0; } /*------------------------------------------------------------------*/ /* * Shutdown the WaveLAN PCMCIA adaptor. * Called by NET3 when it "close" the device. */ static int wavelan_close(struct net_device * dev) { struct pcmcia_device * link = ((net_local *)netdev_priv(dev))->link; unsigned int base = dev->base_addr; #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "%s: ->wavelan_close(dev=0x%x)\n", dev->name, (unsigned int) dev); #endif /* If the device isn't open, then nothing to do */ if(!link->open) { #ifdef DEBUG_CONFIG_INFO printk(KERN_DEBUG "%s: wavelan_close(): device not open\n", dev->name); #endif return 0; } #ifdef WAVELAN_ROAMING /* Cleanup of roaming stuff... */ if(do_roaming) wv_roam_cleanup(dev); #endif /* WAVELAN_ROAMING */ link->open--; /* If the card is still present */ if(netif_running(dev)) { netif_stop_queue(dev); /* Stop receiving new messages and wait end of transmission */ wv_ru_stop(dev); /* Power down the module */ hacr_write(base, HACR_DEFAULT & (~HACR_PWR_STAT)); } #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "%s: <-wavelan_close()\n", dev->name); #endif return 0; } /*------------------------------------------------------------------*/ /* * wavelan_attach() creates an "instance" of the driver, allocating * local data structures for one device (one interface). The device * is registered with Card Services. * * The dev_link structure is initialized, but we don't actually * configure the card at this point -- we wait until we receive a * card insertion event. */ static int wavelan_probe(struct pcmcia_device *p_dev) { struct net_device * dev; /* Interface generic data */ net_local * lp; /* Interface specific data */ int ret; #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "-> wavelan_attach()\n"); #endif /* The io structure describes IO port mapping */ p_dev->io.NumPorts1 = 8; p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8; p_dev->io.IOAddrLines = 3; /* Interrupt setup */ p_dev->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT; p_dev->irq.IRQInfo1 = IRQ_LEVEL_ID; p_dev->irq.Handler = wavelan_interrupt; /* General socket configuration */ p_dev->conf.Attributes = CONF_ENABLE_IRQ; p_dev->conf.IntType = INT_MEMORY_AND_IO; /* Allocate the generic data structure */ dev = alloc_etherdev(sizeof(net_local)); if (!dev) return -ENOMEM; p_dev->priv = p_dev->irq.Instance = dev; lp = netdev_priv(dev); /* Init specific data */ lp->configured = 0; lp->reconfig_82593 = FALSE; lp->nresets = 0; /* Multicast stuff */ lp->promiscuous = 0; lp->allmulticast = 0; lp->mc_count = 0; /* Init spinlock */ spin_lock_init(&lp->spinlock); /* back links */ lp->dev = dev; /* wavelan NET3 callbacks */ dev->open = &wavelan_open; dev->stop = &wavelan_close; dev->hard_start_xmit = &wavelan_packet_xmit; dev->get_stats = &wavelan_get_stats; dev->set_multicast_list = &wavelan_set_multicast_list; #ifdef SET_MAC_ADDRESS dev->set_mac_address = &wavelan_set_mac_address; #endif /* SET_MAC_ADDRESS */ /* Set the watchdog timer */ dev->tx_timeout = &wavelan_watchdog; dev->watchdog_timeo = WATCHDOG_JIFFIES; SET_ETHTOOL_OPS(dev, &ops); dev->wireless_handlers = &wavelan_handler_def; lp->wireless_data.spy_data = &lp->spy_data; dev->wireless_data = &lp->wireless_data; /* Other specific data */ dev->mtu = WAVELAN_MTU; ret = wv_pcmcia_config(p_dev); if (ret) return ret; ret = wv_hw_config(dev); if (ret) { dev->irq = 0; pcmcia_disable_device(p_dev); return ret; } wv_init_info(dev); #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "<- wavelan_attach()\n"); #endif return 0; } /*------------------------------------------------------------------*/ /* * This deletes a driver "instance". The device is de-registered with * Card Services. If it has been released, all local data structures * are freed. Otherwise, the structures will be freed when the device * is released. */ static void wavelan_detach(struct pcmcia_device *link) { #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "-> wavelan_detach(0x%p)\n", link); #endif /* Some others haven't done their job : give them another chance */ wv_pcmcia_release(link); /* Free pieces */ if(link->priv) { struct net_device * dev = (struct net_device *) link->priv; /* Remove ourselves from the kernel list of ethernet devices */ /* Warning : can't be called from interrupt, timer or wavelan_close() */ if (link->dev_node) unregister_netdev(dev); link->dev_node = NULL; ((net_local *)netdev_priv(dev))->link = NULL; ((net_local *)netdev_priv(dev))->dev = NULL; free_netdev(dev); } #ifdef DEBUG_CALLBACK_TRACE printk(KERN_DEBUG "<- wavelan_detach()\n"); #endif } static int wavelan_suspend(struct pcmcia_device *link) { struct net_device * dev = (struct net_device *) link->priv; /* NB: wavelan_close will be called, but too late, so we are * obliged to close nicely the wavelan here. David, could you * close the device before suspending them ? And, by the way, * could you, on resume, add a "route add -net ..." after the * ifconfig up ? Thanks... */ /* Stop receiving new messages and wait end of transmission */ wv_ru_stop(dev); if (link->open) netif_device_detach(dev); /* Power down the module */ hacr_write(dev->base_addr, HACR_DEFAULT & (~HACR_PWR_STAT)); return 0; } static int wavelan_resume(struct pcmcia_device *link) { struct net_device * dev = (struct net_device *) link->priv; if (link->open) { wv_hw_reset(dev); netif_device_attach(dev); } return 0; } static struct pcmcia_device_id wavelan_ids[] = { PCMCIA_DEVICE_PROD_ID12("AT&T","WaveLAN/PCMCIA", 0xe7c5affd, 0x1bc50975), PCMCIA_DEVICE_PROD_ID12("Digital", "RoamAbout/DS", 0x9999ab35, 0x00d05e06), PCMCIA_DEVICE_PROD_ID12("Lucent Technologies", "WaveLAN/PCMCIA", 0x23eb9949, 0x1bc50975), PCMCIA_DEVICE_PROD_ID12("NCR", "WaveLAN/PCMCIA", 0x24358cd4, 0x1bc50975), PCMCIA_DEVICE_NULL, }; MODULE_DEVICE_TABLE(pcmcia, wavelan_ids); static struct pcmcia_driver wavelan_driver = { .owner = THIS_MODULE, .drv = { .name = "wavelan_cs", }, .probe = wavelan_probe, .remove = wavelan_detach, .id_table = wavelan_ids, .suspend = wavelan_suspend, .resume = wavelan_resume, }; static int __init init_wavelan_cs(void) { return pcmcia_register_driver(&wavelan_driver); } static void __exit exit_wavelan_cs(void) { pcmcia_unregister_driver(&wavelan_driver); } module_init(init_wavelan_cs); module_exit(exit_wavelan_cs);