natsemi: fix MMIO for PPC 44x platforms

[safe/jmp/linux-2.6] / drivers / net / wireless / wavelan.c

/*
 *      WaveLAN ISA driver
 *
 *              Jean II - HPLB '96
 *
 * Reorganisation and extension of the driver.
 * Original copyright follows (also see the end of this file).
 * See wavelan.p.h for details.
 *
 *
 *
 * AT&T GIS (nee NCR) WaveLAN card:
 *      An Ethernet-like radio transceiver
 *      controlled by an Intel 82586 coprocessor.
 */

#include "wavelan.p.h"          /* Private header */

/************************* MISC SUBROUTINES **************************/
/*
 * Subroutines which won't fit in one of the following category
 * (WaveLAN modem or i82586)
 */

/*------------------------------------------------------------------*/
/*
 * Translate irq number to PSA irq parameter
 */
static u8 wv_irq_to_psa(int irq)
{
        if (irq < 0 || irq >= ARRAY_SIZE(irqvals))
                return 0;

        return irqvals[irq];
}

/*------------------------------------------------------------------*/
/*
 * Translate PSA irq parameter to irq number 
 */
static int __init wv_psa_to_irq(u8 irqval)
{
        int irq;

        for (irq = 0; irq < ARRAY_SIZE(irqvals); irq++)
                if (irqvals[irq] == irqval)
                        return irq;

        return -1;
}

/********************* HOST ADAPTER SUBROUTINES *********************/
/*
 * Useful subroutines to manage the WaveLAN ISA interface
 *
 * One major difference with the PCMCIA hardware (except the port mapping)
 * is that we have to keep the state of the Host Control Register
 * because of the interrupt enable & bus size flags.
 */

/*------------------------------------------------------------------*/
/*
 * Read from card's Host Adaptor Status Register.
 */
static inline u16 hasr_read(unsigned long ioaddr)
{
        return (inw(HASR(ioaddr)));
}                               /* hasr_read */

/*------------------------------------------------------------------*/
/*
 * Write to card's Host Adapter Command Register.
 */
static inline void hacr_write(unsigned long ioaddr, u16 hacr)
{
        outw(hacr, HACR(ioaddr));
}                               /* 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(unsigned long ioaddr, u16 hacr)
{
        hacr_write(ioaddr, hacr);
        /* delay might only be needed sometimes */
        mdelay(1);
}                               /* hacr_write_slow */

/*------------------------------------------------------------------*/
/*
 * Set the channel attention bit.
 */
static inline void set_chan_attn(unsigned long ioaddr, u16 hacr)
{
        hacr_write(ioaddr, hacr | HACR_CA);
}                               /* set_chan_attn */

/*------------------------------------------------------------------*/
/*
 * Reset, and then set host adaptor into default mode.
 */
static inline void wv_hacr_reset(unsigned long ioaddr)
{
        hacr_write_slow(ioaddr, HACR_RESET);
        hacr_write(ioaddr, HACR_DEFAULT);
}                               /* wv_hacr_reset */

/*------------------------------------------------------------------*/
/*
 * Set the I/O transfer over the ISA bus to 8-bit mode
 */
static inline void wv_16_off(unsigned long ioaddr, u16 hacr)
{
        hacr &= ~HACR_16BITS;
        hacr_write(ioaddr, hacr);
}                               /* wv_16_off */

/*------------------------------------------------------------------*/
/*
 * Set the I/O transfer over the ISA bus to 8-bit mode
 */
static inline void wv_16_on(unsigned long ioaddr, u16 hacr)
{
        hacr |= HACR_16BITS;
        hacr_write(ioaddr, hacr);
}                               /* wv_16_on */

/*------------------------------------------------------------------*/
/*
 * Disable interrupts on the WaveLAN hardware.
 * (called by wv_82586_stop())
 */
static inline void wv_ints_off(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        
        lp->hacr &= ~HACR_INTRON;
        hacr_write(ioaddr, lp->hacr);
}                               /* wv_ints_off */

/*------------------------------------------------------------------*/
/*
 * Enable interrupts on the WaveLAN hardware.
 * (called by wv_hw_reset())
 */
static inline void wv_ints_on(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;

        lp->hacr |= HACR_INTRON;
        hacr_write(ioaddr, lp->hacr);
}                               /* wv_ints_on */

/******************* MODEM MANAGEMENT SUBROUTINES *******************/
/*
 * Useful subroutines to manage the modem of the WaveLAN
 */

/*------------------------------------------------------------------*/
/*
 * Read the Parameter Storage Area from the WaveLAN card's memory
 */
/*
 * Read bytes from the PSA.
 */
static void psa_read(unsigned long ioaddr, u16 hacr, int o,     /* offset in PSA */
                     u8 * b,    /* buffer to fill */
                     int n)
{                               /* size to read */
        wv_16_off(ioaddr, hacr);

        while (n-- > 0) {
                outw(o, PIOR2(ioaddr));
                o++;
                *b++ = inb(PIOP2(ioaddr));
        }

        wv_16_on(ioaddr, hacr);
}                               /* psa_read */

/*------------------------------------------------------------------*/
/*
 * Write the Parameter Storage Area to the WaveLAN card's memory.
 */
static void psa_write(unsigned long ioaddr, u16 hacr, int o,    /* Offset in PSA */
                      u8 * b,   /* Buffer in memory */
                      int n)
{                               /* Length of buffer */
        int count = 0;

        wv_16_off(ioaddr, hacr);

        while (n-- > 0) {
                outw(o, PIOR2(ioaddr));
                o++;

                outb(*b, PIOP2(ioaddr));
                b++;

                /* Wait for the memory to finish its write cycle */
                count = 0;
                while ((count++ < 100) &&
                       (hasr_read(ioaddr) & HASR_PSA_BUSY)) mdelay(1);
        }

        wv_16_on(ioaddr, hacr);
}                               /* 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 u16 psa_crc(u8 * psa,    /* The PSA */
                              int size)
{                               /* Number of short for CRC */
        int byte_cnt;           /* Loop on the PSA */
        u16 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, unsigned long ioaddr, u16 hacr)
{
#ifdef SET_PSA_CRC
        psa_t psa;
        u16 crc;

        /* read the parameter storage area */
        psa_read(ioaddr, hacr, 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(ioaddr, hacr, (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(unsigned long ioaddr, u16 o, u8 d)
{
        int count = 0;

        /* Wait for MMC to go idle */
        while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
                udelay(10);

        outw((u16) (((u16) d << 8) | (o << 1) | 1), MMCR(ioaddr));
}

/*------------------------------------------------------------------*/
/*
 * Routine to write bytes to the Modem Management Controller.
 * We start at the end because it is the way it should be!
 */
static void mmc_write(unsigned long ioaddr, u8 o, u8 * b, int n)
{
        o += n;
        b += n;

        while (n-- > 0)
                mmc_out(ioaddr, --o, *(--b));
}                               /* mmc_write */

/*------------------------------------------------------------------*/
/*
 * Read a byte from the MMC.
 * Optimised version for 1 byte, avoid using memory.
 */
static u8 mmc_in(unsigned long ioaddr, u16 o)
{
        int count = 0;

        while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
                udelay(10);
        outw(o << 1, MMCR(ioaddr));

        while ((count++ < 100) && (inw(HASR(ioaddr)) & HASR_MMC_BUSY))
                udelay(10);
        return (u8) (inw(MMCR(ioaddr)) >> 8);
}

/*------------------------------------------------------------------*/
/*
 * 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 at the end because it is the way it should be!
 */
static inline void mmc_read(unsigned long ioaddr, u8 o, u8 * b, int n)
{
        o += n;
        b += n;

        while (n-- > 0)
                *(--b) = mmc_in(ioaddr, --o);
}                               /* mmc_read */

/*------------------------------------------------------------------*/
/*
 * Get the type of encryption available.
 */
static inline int mmc_encr(unsigned long ioaddr)
{                               /* I/O port of the card */
        int temp;

        temp = mmc_in(ioaddr, 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.
 * I hope this one will be optimally inlined.
 */
static inline void fee_wait(unsigned long ioaddr,       /* 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(ioaddr, mmroff(0, mmr_fee_status)) &
                MMR_FEE_STATUS_BUSY)) udelay(delay);
}

/*------------------------------------------------------------------*/
/*
 * Read bytes from the Frequency EEPROM (frequency select cards).
 */
static void fee_read(unsigned long ioaddr,      /* I/O port of the card */
                     u16 o,     /* destination offset */
                     u16 * b,   /* data buffer */
                     int n)
{                               /* number of registers */
        b += n;                 /* Position at the end of the area */

        /* Write the address */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), o + n - 1);

        /* Loop on all buffer */
        while (n-- > 0) {
                /* Write the read command */
                mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl),
                        MMW_FEE_CTRL_READ);

                /* Wait until EEPROM is ready (should be quick). */
                fee_wait(ioaddr, 10, 100);

                /* Read the value. */
                *--b = ((mmc_in(ioaddr, mmroff(0, mmr_fee_data_h)) << 8) |
                        mmc_in(ioaddr, 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(unsigned long ioaddr,     /* I/O port of the card */
                      u16 o,    /* destination offset */
                      u16 * 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(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRREAD);

        fee_wait(ioaddr, 10, 100);

        /* Read the protected register. */
        printk("Protected 2:  %02X-%02X\n",
               mmc_in(ioaddr, mmroff(0, mmr_fee_data_h)),
               mmc_in(ioaddr, mmroff(0, mmr_fee_data_l)));
#endif                          /* DOESNT_SEEM_TO_WORK */

        /* Enable protected register. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PREN);

        fee_wait(ioaddr, 10, 100);

        /* Unprotect area. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), o + n);
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);
#ifdef DOESNT_SEEM_TO_WORK      /* disabled */
        /* or use: */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRCLEAR);
#endif                          /* DOESNT_SEEM_TO_WORK */

        fee_wait(ioaddr, 10, 100);
#endif                          /* EEPROM_IS_PROTECTED */

        /* Write enable. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_EN);
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WREN);

        fee_wait(ioaddr, 10, 100);

        /* Write the EEPROM address. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), o + n - 1);

        /* Loop on all buffer */
        while (n-- > 0) {
                /* Write the value. */
                mmc_out(ioaddr, mmwoff(0, mmw_fee_data_h), (*--b) >> 8);
                mmc_out(ioaddr, mmwoff(0, mmw_fee_data_l), *b & 0xFF);

                /* Write the write command. */
                mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl),
                        MMW_FEE_CTRL_WRITE);

                /* WaveLAN documentation says to wait at least 10 ms for EEBUSY = 0 */
                mdelay(10);
                fee_wait(ioaddr, 10, 100);
        }

        /* Write disable. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), MMW_FEE_ADDR_DS);
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_WDS);

        fee_wait(ioaddr, 10, 100);

#ifdef EEPROM_IS_PROTECTED      /* disabled */
        /* Reprotect EEPROM. */
        mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), 0x00);
        mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl), MMW_FEE_CTRL_PRWRITE);

        fee_wait(ioaddr, 10, 100);
#endif                          /* EEPROM_IS_PROTECTED */
}

/************************ I82586 SUBROUTINES *************************/
/*
 * Useful subroutines to manage the Ethernet controller
 */

/*------------------------------------------------------------------*/
/*
 * Read bytes from the on-board RAM.
 * Why does inlining this function make it fail?
 */
static /*inline */ void obram_read(unsigned long ioaddr,
                                   u16 o, u8 * b, int n)
{
        outw(o, PIOR1(ioaddr));
        insw(PIOP1(ioaddr), (unsigned short *) b, (n + 1) >> 1);
}

/*------------------------------------------------------------------*/
/*
 * Write bytes to the on-board RAM.
 */
static inline void obram_write(unsigned long ioaddr, u16 o, u8 * b, int n)
{
        outw(o, PIOR1(ioaddr));
        outsw(PIOP1(ioaddr), (unsigned short *) b, (n + 1) >> 1);
}

/*------------------------------------------------------------------*/
/*
 * Acknowledge the reading of the status issued by the i82586.
 */
static void wv_ack(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        u16 scb_cs;
        int i;

        obram_read(ioaddr, scboff(OFFSET_SCB, scb_status),
                   (unsigned char *) &scb_cs, sizeof(scb_cs));
        scb_cs &= SCB_ST_INT;

        if (scb_cs == 0)
                return;

        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &scb_cs, sizeof(scb_cs));

        set_chan_attn(ioaddr, lp->hacr);

        for (i = 1000; i > 0; i--) {
                obram_read(ioaddr, scboff(OFFSET_SCB, scb_command),
                           (unsigned char *) &scb_cs, sizeof(scb_cs));
                if (scb_cs == 0)
                        break;

                udelay(10);
        }
        udelay(100);

#ifdef DEBUG_CONFIG_ERROR
        if (i <= 0)
                printk(KERN_INFO
                       "%s: wv_ack(): board not accepting command.\n",
                       dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * Set channel attention bit and busy wait until command has
 * completed, then acknowledge completion of the command.
 */
static int wv_synchronous_cmd(struct net_device * dev, const char *str)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        u16 scb_cmd;
        ach_t cb;
        int i;

        scb_cmd = SCB_CMD_CUC & SCB_CMD_CUC_GO;
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &scb_cmd, sizeof(scb_cmd));

        set_chan_attn(ioaddr, lp->hacr);

        for (i = 1000; i > 0; i--) {
                obram_read(ioaddr, OFFSET_CU, (unsigned char *) &cb,
                           sizeof(cb));
                if (cb.ac_status & AC_SFLD_C)
                        break;

                udelay(10);
        }
        udelay(100);

        if (i <= 0 || !(cb.ac_status & AC_SFLD_OK)) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO "%s: %s failed; status = 0x%x\n",
                       dev->name, str, cb.ac_status);
#endif
#ifdef DEBUG_I82586_SHOW
                wv_scb_show(ioaddr);
#endif
                return -1;
        }

        /* Ack the status */
        wv_ack(dev);

        return 0;
}

/*------------------------------------------------------------------*/
/*
 * Configuration commands completion interrupt.
 * Check if done, and if OK.
 */
static int
wv_config_complete(struct net_device * dev, unsigned long ioaddr, net_local * lp)
{
        unsigned short mcs_addr;
        unsigned short status;
        int ret;

#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: ->wv_config_complete()\n", dev->name);
#endif

        mcs_addr = lp->tx_first_in_use + sizeof(ac_tx_t) + sizeof(ac_nop_t)
            + sizeof(tbd_t) + sizeof(ac_cfg_t) + sizeof(ac_ias_t);

        /* Read the status of the last command (set mc list). */
        obram_read(ioaddr, acoff(mcs_addr, ac_status),
                   (unsigned char *) &status, sizeof(status));

        /* If not completed -> exit */
        if ((status & AC_SFLD_C) == 0)
                ret = 0;        /* Not ready to be scrapped */
        else {
#ifdef DEBUG_CONFIG_ERROR
                unsigned short cfg_addr;
                unsigned short ias_addr;

                /* Check mc_config command */
                if ((status & AC_SFLD_OK) != AC_SFLD_OK)
                        printk(KERN_INFO
                               "%s: wv_config_complete(): set_multicast_address failed; status = 0x%x\n",
                               dev->name, status);

                /* check ia-config command */
                ias_addr = mcs_addr - sizeof(ac_ias_t);
                obram_read(ioaddr, acoff(ias_addr, ac_status),
                           (unsigned char *) &status, sizeof(status));
                if ((status & AC_SFLD_OK) != AC_SFLD_OK)
                        printk(KERN_INFO
                               "%s: wv_config_complete(): set_MAC_address failed; status = 0x%x\n",
                               dev->name, status);

                /* Check config command. */
                cfg_addr = ias_addr - sizeof(ac_cfg_t);
                obram_read(ioaddr, acoff(cfg_addr, ac_status),
                           (unsigned char *) &status, sizeof(status));
                if ((status & AC_SFLD_OK) != AC_SFLD_OK)
                        printk(KERN_INFO
                               "%s: wv_config_complete(): configure failed; status = 0x%x\n",
                               dev->name, status);
#endif  /* DEBUG_CONFIG_ERROR */

                ret = 1;        /* Ready to be scrapped */
        }

#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: <-wv_config_complete() - %d\n", dev->name,
               ret);
#endif
        return ret;
}

/*------------------------------------------------------------------*/
/*
 * Command completion interrupt.
 * Reclaim as many freed tx buffers as we can.
 * (called in wavelan_interrupt()).
 * Note : the spinlock is already grabbed for us.
 */
static int wv_complete(struct net_device * dev, unsigned long ioaddr, net_local * lp)
{
        int nreaped = 0;

#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: ->wv_complete()\n", dev->name);
#endif

        /* Loop on all the transmit buffers */
        while (lp->tx_first_in_use != I82586NULL) {
                unsigned short tx_status;

                /* Read the first transmit buffer */
                obram_read(ioaddr, acoff(lp->tx_first_in_use, ac_status),
                           (unsigned char *) &tx_status,
                           sizeof(tx_status));

                /* If not completed -> exit */
                if ((tx_status & AC_SFLD_C) == 0)
                        break;

                /* Hack for reconfiguration */
                if (tx_status == 0xFFFF)
                        if (!wv_config_complete(dev, ioaddr, lp))
                                break;  /* Not completed */

                /* We now remove this buffer */
                nreaped++;
                --lp->tx_n_in_use;

/*
if (lp->tx_n_in_use > 0)
        printk("%c", "0123456789abcdefghijk"[lp->tx_n_in_use]);
*/

                /* Was it the last one? */
                if (lp->tx_n_in_use <= 0)
                        lp->tx_first_in_use = I82586NULL;
                else {
                        /* Next one in the chain */
                        lp->tx_first_in_use += TXBLOCKZ;
                        if (lp->tx_first_in_use >=
                            OFFSET_CU +
                            NTXBLOCKS * TXBLOCKZ) lp->tx_first_in_use -=
                                    NTXBLOCKS * TXBLOCKZ;
                }

                /* Hack for reconfiguration */
                if (tx_status == 0xFFFF)
                        continue;

                /* Now, check status of the finished command */
                if (tx_status & AC_SFLD_OK) {
                        int ncollisions;

                        lp->stats.tx_packets++;
                        ncollisions = tx_status & AC_SFLD_MAXCOL;
                        lp->stats.collisions += ncollisions;
#ifdef DEBUG_TX_INFO
                        if (ncollisions > 0)
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx completed after %d collisions.\n",
                                       dev->name, ncollisions);
#endif
                } else {
                        lp->stats.tx_errors++;
                        if (tx_status & AC_SFLD_S10) {
                                lp->stats.tx_carrier_errors++;
#ifdef DEBUG_TX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx error: no CS.\n",
                                       dev->name);
#endif
                        }
                        if (tx_status & AC_SFLD_S9) {
                                lp->stats.tx_carrier_errors++;
#ifdef DEBUG_TX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx error: lost CTS.\n",
                                       dev->name);
#endif
                        }
                        if (tx_status & AC_SFLD_S8) {
                                lp->stats.tx_fifo_errors++;
#ifdef DEBUG_TX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx error: slow DMA.\n",
                                       dev->name);
#endif
                        }
                        if (tx_status & AC_SFLD_S6) {
                                lp->stats.tx_heartbeat_errors++;
#ifdef DEBUG_TX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx error: heart beat.\n",
                                       dev->name);
#endif
                        }
                        if (tx_status & AC_SFLD_S5) {
                                lp->stats.tx_aborted_errors++;
#ifdef DEBUG_TX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_complete(): tx error: too many collisions.\n",
                                       dev->name);
#endif
                        }
                }

#ifdef DEBUG_TX_INFO
                printk(KERN_DEBUG
                       "%s: wv_complete(): tx completed, tx_status 0x%04x\n",
                       dev->name, tx_status);
#endif
        }

#ifdef DEBUG_INTERRUPT_INFO
        if (nreaped > 1)
                printk(KERN_DEBUG "%s: wv_complete(): reaped %d\n",
                       dev->name, nreaped);
#endif

        /*
         * Inform upper layers.
         */
        if (lp->tx_n_in_use < NTXBLOCKS - 1) {
                netif_wake_queue(dev);
        }
#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: <-wv_complete()\n", dev->name);
#endif
        return nreaped;
}

/*------------------------------------------------------------------*/
/*
 * Reconfigure the i82586, or at least ask for it.
 * Because wv_82586_config uses a transmission buffer, we must do it
 * when we are sure that there is one left, 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
 * delays sometimes.
 */
static void wv_82586_reconfig(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long flags;

        /* Arm the flag, will be cleard in wv_82586_config() */
        lp->reconfig_82586 = 1;

        /* Check if we can do it now ! */
        if((netif_running(dev)) && !(netif_queue_stopped(dev))) {
                spin_lock_irqsave(&lp->spinlock, flags);
                /* May fail */
                wv_82586_config(dev);
                spin_unlock_irqrestore(&lp->spinlock, flags);
        }
        else {
#ifdef DEBUG_CONFIG_INFO
                printk(KERN_DEBUG
                       "%s: wv_82586_reconfig(): delayed (state = %lX)\n",
                               dev->name, dev->state);
#endif
        }
}

/********************* DEBUG & INFO SUBROUTINES *********************/
/*
 * This routine is used in the code to show information for debugging.
 * Most of the time, it dumps the contents of hardware structures.
 */

#ifdef DEBUG_PSA_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the formatted contents of the Parameter Storage Area.
 */
static void wv_psa_show(psa_t * p)
{
        DECLARE_MAC_BUF(mac);

        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[]: %s\n",
               print_mac(mac, p->psa_unused0));
#endif                          /* DEBUG_SHOW_UNUSED */
        printk(KERN_DEBUG "psa_univ_mac_addr[]: %s\n",
               print_mac(mac, p->psa_univ_mac_addr));
        printk(KERN_DEBUG "psa_local_mac_addr[]: %s\n",
               print_mac(mac, 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:%02X:%02X\n",
               p->psa_reserved[0],
               p->psa_reserved[1], p->psa_reserved[2], p->psa_reserved[3]);
#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 needs to be completed.
 */
static void wv_mmc_show(struct net_device * dev)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;
        mmr_t m;

        /* Basic check */
        if (hasr_read(ioaddr) & HASR_NO_CLK) {
                printk(KERN_WARNING
                       "%s: wv_mmc_show: modem not connected\n",
                       dev->name);
                return;
        }

        /* Read the mmc */
        mmc_out(ioaddr, mmwoff(0, mmw_freeze), 1);
        mmc_read(ioaddr, 0, (u8 *) & m, sizeof(m));
        mmc_out(ioaddr, 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;

        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_I82586_SHOW
/*------------------------------------------------------------------*/
/*
 * Print the last block of the i82586 memory.
 */
static void wv_scb_show(unsigned long ioaddr)
{
        scb_t scb;

        obram_read(ioaddr, OFFSET_SCB, (unsigned char *) &scb,
                   sizeof(scb));

        printk(KERN_DEBUG "##### WaveLAN system control block: #####\n");

        printk(KERN_DEBUG "status: ");
        printk("stat 0x%x[%s%s%s%s] ",
               (scb.
                scb_status & (SCB_ST_CX | SCB_ST_FR | SCB_ST_CNA |
                              SCB_ST_RNR)) >> 12,
               (scb.
                scb_status & SCB_ST_CX) ? "command completion interrupt," :
               "", (scb.scb_status & SCB_ST_FR) ? "frame received," : "",
               (scb.
                scb_status & SCB_ST_CNA) ? "command unit not active," : "",
               (scb.
                scb_status & SCB_ST_RNR) ? "receiving unit not ready," :
               "");
        printk("cus 0x%x[%s%s%s] ", (scb.scb_status & SCB_ST_CUS) >> 8,
               ((scb.scb_status & SCB_ST_CUS) ==
                SCB_ST_CUS_IDLE) ? "idle" : "",
               ((scb.scb_status & SCB_ST_CUS) ==
                SCB_ST_CUS_SUSP) ? "suspended" : "",
               ((scb.scb_status & SCB_ST_CUS) ==
                SCB_ST_CUS_ACTV) ? "active" : "");
        printk("rus 0x%x[%s%s%s%s]\n", (scb.scb_status & SCB_ST_RUS) >> 4,
               ((scb.scb_status & SCB_ST_RUS) ==
                SCB_ST_RUS_IDLE) ? "idle" : "",
               ((scb.scb_status & SCB_ST_RUS) ==
                SCB_ST_RUS_SUSP) ? "suspended" : "",
               ((scb.scb_status & SCB_ST_RUS) ==
                SCB_ST_RUS_NRES) ? "no resources" : "",
               ((scb.scb_status & SCB_ST_RUS) ==
                SCB_ST_RUS_RDY) ? "ready" : "");

        printk(KERN_DEBUG "command: ");
        printk("ack 0x%x[%s%s%s%s] ",
               (scb.
                scb_command & (SCB_CMD_ACK_CX | SCB_CMD_ACK_FR |
                               SCB_CMD_ACK_CNA | SCB_CMD_ACK_RNR)) >> 12,
               (scb.
                scb_command & SCB_CMD_ACK_CX) ? "ack cmd completion," : "",
               (scb.
                scb_command & SCB_CMD_ACK_FR) ? "ack frame received," : "",
               (scb.
                scb_command & SCB_CMD_ACK_CNA) ? "ack CU not active," : "",
               (scb.
                scb_command & SCB_CMD_ACK_RNR) ? "ack RU not ready," : "");
        printk("cuc 0x%x[%s%s%s%s%s] ",
               (scb.scb_command & SCB_CMD_CUC) >> 8,
               ((scb.scb_command & SCB_CMD_CUC) ==
                SCB_CMD_CUC_NOP) ? "nop" : "",
               ((scb.scb_command & SCB_CMD_CUC) ==
                SCB_CMD_CUC_GO) ? "start cbl_offset" : "",
               ((scb.scb_command & SCB_CMD_CUC) ==
                SCB_CMD_CUC_RES) ? "resume execution" : "",
               ((scb.scb_command & SCB_CMD_CUC) ==
                SCB_CMD_CUC_SUS) ? "suspend execution" : "",
               ((scb.scb_command & SCB_CMD_CUC) ==
                SCB_CMD_CUC_ABT) ? "abort execution" : "");
        printk("ruc 0x%x[%s%s%s%s%s]\n",
               (scb.scb_command & SCB_CMD_RUC) >> 4,
               ((scb.scb_command & SCB_CMD_RUC) ==
                SCB_CMD_RUC_NOP) ? "nop" : "",
               ((scb.scb_command & SCB_CMD_RUC) ==
                SCB_CMD_RUC_GO) ? "start rfa_offset" : "",
               ((scb.scb_command & SCB_CMD_RUC) ==
                SCB_CMD_RUC_RES) ? "resume reception" : "",
               ((scb.scb_command & SCB_CMD_RUC) ==
                SCB_CMD_RUC_SUS) ? "suspend reception" : "",
               ((scb.scb_command & SCB_CMD_RUC) ==
                SCB_CMD_RUC_ABT) ? "abort reception" : "");

        printk(KERN_DEBUG "cbl_offset 0x%x ", scb.scb_cbl_offset);
        printk("rfa_offset 0x%x\n", scb.scb_rfa_offset);

        printk(KERN_DEBUG "crcerrs %d ", scb.scb_crcerrs);
        printk("alnerrs %d ", scb.scb_alnerrs);
        printk("rscerrs %d ", scb.scb_rscerrs);
        printk("ovrnerrs %d\n", scb.scb_ovrnerrs);
}

/*------------------------------------------------------------------*/
/*
 * Print the formatted status of the i82586's receive unit.
 */
static void wv_ru_show(struct net_device * dev)
{
        /* net_local *lp = (net_local *) dev->priv; */

        printk(KERN_DEBUG
               "##### WaveLAN i82586 receiver unit status: #####\n");
        printk(KERN_DEBUG "ru:");
        /*
         * Not implemented yet
         */
        printk("\n");
}                               /* wv_ru_show */

/*------------------------------------------------------------------*/
/*
 * Display info about one control block of the i82586 memory.
 */
static void wv_cu_show_one(struct net_device * dev, net_local * lp, int i, u16 p)
{
        unsigned long ioaddr;
        ac_tx_t actx;

        ioaddr = dev->base_addr;

        printk("%d: 0x%x:", i, p);

        obram_read(ioaddr, p, (unsigned char *) &actx, sizeof(actx));
        printk(" status=0x%x,", actx.tx_h.ac_status);
        printk(" command=0x%x,", actx.tx_h.ac_command);

        /*
           {
           tbd_t      tbd;

           obram_read(ioaddr, actx.tx_tbd_offset, (unsigned char *)&tbd, sizeof(tbd));
           printk(" tbd_status=0x%x,", tbd.tbd_status);
           }
         */

        printk("|");
}

/*------------------------------------------------------------------*/
/*
 * Print status of the command unit of the i82586.
 */
static void wv_cu_show(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned int i;
        u16 p;

        printk(KERN_DEBUG
               "##### WaveLAN i82586 command unit status: #####\n");

        printk(KERN_DEBUG);
        for (i = 0, p = lp->tx_first_in_use; i < NTXBLOCKS; i++) {
                wv_cu_show_one(dev, lp, i, p);

                p += TXBLOCKZ;
                if (p >= OFFSET_CU + NTXBLOCKS * TXBLOCKZ)
                        p -= NTXBLOCKS * TXBLOCKZ;
        }
        printk("\n");
}
#endif                          /* DEBUG_I82586_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;

        lp = (net_local *) dev->priv;

        printk(KERN_DEBUG "local:");
        printk(" tx_n_in_use=%d,", lp->tx_n_in_use);
        printk(" hacr=0x%x,", lp->hacr);
        printk(" rx_head=0x%x,", lp->rx_head);
        printk(" rx_last=0x%x,", lp->rx_last);
        printk(" tx_first_free=0x%x,", lp->tx_first_free);
        printk(" tx_first_in_use=0x%x,", lp->tx_first_in_use);
        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 inline void wv_packet_info(u8 * 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;
        DECLARE_MAC_BUF(mac);

        printk(KERN_DEBUG
               "%s: %s(): dest %s, length %d\n",
               msg1, msg2, print_mac(mac, p), length);
        printk(KERN_DEBUG
               "%s: %s(): src %s, type 0x%02X%02X\n",
               msg1, msg2, print_mac(mac, &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 are lots of flags for configuring it to your liking.
 */
static void wv_init_info(struct net_device * dev)
{
        short ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;
        psa_t psa;
#ifdef DEBUG_BASIC_SHOW
        DECLARE_MAC_BUF(mac);
#endif

        /* Read the parameter storage area */
        psa_read(ioaddr, lp->hacr, 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_I82586_SHOW
        wv_cu_show(dev);
#endif

#ifdef DEBUG_BASIC_SHOW
        /* Now, let's go for the basic stuff. */
        printk(KERN_NOTICE "%s: WaveLAN at %#x, %s, IRQ %d",
               dev->name, ioaddr, print_mac(mac, dev->dev_addr), dev->irq);

        /* 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(ioaddr, 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(ioaddr, 0x00, &freq, 1);

                /* Print frequency */
                printk(", 2.00, %ld", (freq >> 6) + 2400L);

                /* Hack! */
                if (freq & 0x20)
                        printk(".5");
        } else {
                printk(", PC");
                switch (psa.psa_comp_number) {
                case PSA_COMP_PC_AT_915:
                case PSA_COMP_PC_AT_2400:
                        printk("-AT");
                        break;
                case PSA_COMP_PC_MC_915:
                case PSA_COMP_PC_MC_2400:
                        printk("-MC");
                        break;
                case PSA_COMP_PCMCIA_915:
                        printk("MCIA");
                        break;
                default:
                        printk("?");
                }
                printk(", ");
                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("?");
                }
        }

        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 different
 * 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 *) dev->priv)->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 = (net_local *) dev->priv;

#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

        /* Are we asking for promiscuous mode,
         * or all multicast addresses (we don't have that!)
         * or too many multicast addresses for the hardware filter? */
        if ((dev->flags & IFF_PROMISC) ||
            (dev->flags & IFF_ALLMULTI) ||
            (dev->mc_count > I82586_MAX_MULTICAST_ADDRESSES)) {
                /*
                 * Enable promiscuous mode: receive all packets.
                 */
                if (!lp->promiscuous) {
                        lp->promiscuous = 1;
                        lp->mc_count = 0;

                        wv_82586_reconfig(dev);

                        /* Tell the kernel that we are doing a really bad job. */
                        dev->flags |= IFF_PROMISC;
                }
        } else
                /* Are there 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 || (dev->mc_count != lp->mc_count))
#endif
                {
                        lp->promiscuous = 0;
                        lp->mc_count = dev->mc_count;

                        wv_82586_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->mc_count = 0;

                        wv_82586_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);

        /* Reconfigure the beast. */
        wv_82586_reconfig(dev);

        return 0;
}
#endif                          /* SET_MAC_ADDRESS */


/*------------------------------------------------------------------*/
/*
 * Frequency setting (for hardware capable of it)
 * It's a bit complicated and you don't really want to look into it.
 * (called in wavelan_ioctl)
 */
static int wv_set_frequency(unsigned long ioaddr,       /* 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 */
        /* Theoretically, 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 22 MHz wide, so some of the channels
         * will interfere. */
        if ((frequency->e == 0) && (frequency->m < BAND_NUM)) {
                /* Get frequency offset. */
                freq = channel_bands[frequency->m] >> 1;
        }

        /* Verify that the frequency is allowed. */
        if (freq != 0L) {
                u16 table[10];  /* Authorized frequency table */

                /* Read the frequency table. */
                fee_read(ioaddr, 0x71, 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 to see whether 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
                 * and 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(ioaddr, 0x00, area, 16);

                /* Read the DAC. */
                fee_read(ioaddr, 0x60, dac, 2);

                /* Read the new power adjust value. */
                fee_read(ioaddr, 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);

                /* Other parts 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(ioaddr, 0x00, area, 16);

                /* Write the DAC. */
                fee_write(ioaddr, 0x60, dac, 2);

                /* We now should verify here that the writing of the EEPROM went OK. */

                /* Reread the first area. */
                fee_read(ioaddr, 0x00, area_verify, 16);

                /* Reread the DAC. */
                fee_read(ioaddr, 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
                 * synthesizers (from the EEPROM - area 1)
                 * Note: as the EEPROM is automatically decremented, we set the end
                 * if the area... */
                mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), 0x0F);
                mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl),
                        MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD);

                /* Wait until the download is finished. */
                fee_wait(ioaddr, 100, 100);

                /* We must now download the power adjust value (gain) to
                 * the synthesizers (from the EEPROM - area 7 - DAC). */
                mmc_out(ioaddr, mmwoff(0, mmw_fee_addr), 0x61);
                mmc_out(ioaddr, mmwoff(0, mmw_fee_ctrl),
                        MMW_FEE_CTRL_READ | MMW_FEE_CTRL_DWLD);

                /* Wait for the download to finish. */
                fee_wait(ioaddr, 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(unsigned long ioaddr,      /* I/O port of the card */
                                    iw_freq * list,     /* List of frequencies to fill */
                                    int max)
{                               /* Maximum number of frequencies */
        u16 table[10];  /* Authorized frequency table */
        long freq = 0L;         /* offset to 2.4 GHz in .5 MHz + 12 MHz */
        int i;                  /* index in the table */
        int c = 0;              /* Channel number */

        /* Read the frequency table. */
        fee_read(ioaddr, 0x71 /* frequency table */ , table, 10);

        /* Check 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 ((c < ARRAY_SIZE(channel_bands)) &&
                                (((channel_bands[c] >> 1) - 24) < freq)) 
                                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 our list, and if they match, get the statistics.
 * Sorry, but this function really needs the wireless extensions.
 */
static inline void wl_spy_gather(struct net_device * dev,
                                 u8 *   mac,    /* MAC address */
                                 u8 *   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 calculates a histogram of 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, u8 * stats)
{                               /* Statistics to gather */
        net_local *lp = (net_local *) dev->priv;
        u8 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 */

/*------------------------------------------------------------------*/
/*
 * 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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, lp->hacr,
                          (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(ioaddr,
                          (char *) &m.w.mmw_netw_id_l -
                          (char *) &m,
                          (unsigned char *) &m.w.mmw_netw_id_l, 2);
                mmc_out(ioaddr, mmwoff(0, mmw_loopt_sel), 0x00);
        } else {
                /* Disable NWID in the psa. */
                psa.psa_nwid_select = 0x00;
                psa_write(ioaddr, lp->hacr,
                          (char *) &psa.psa_nwid_select -
                          (char *) &psa,
                          (unsigned char *) &psa.psa_nwid_select,
                          1);

                /* Disable NWID in the mmc (no filtering). */
                mmc_out(ioaddr, mmwoff(0, mmw_loopt_sel),
                        MMW_LOOPT_SEL_DIS_NWID);
        }
        /* update the Wavelan checksum */
        update_psa_checksum(dev, ioaddr, lp->hacr);

        /* 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)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, lp->hacr,
                 (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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, mmroff(0, mmr_fee_status)) &
              (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY)))
                ret = wv_set_frequency(ioaddr, &(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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, 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(ioaddr, 0x00, &freq, 1);
                wrqu->freq.m = ((freq >> 5) * 5 + 24000L) * 10000;
                wrqu->freq.e = 1;
        } else {
                psa_read(ioaddr, lp->hacr,
                         (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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, lp->hacr,
                  (char *) &psa.psa_thr_pre_set - (char *) &psa,
                  (unsigned char *) &psa.psa_thr_pre_set, 1);
        /* update the Wavelan checksum */
        update_psa_checksum(dev, ioaddr, lp->hacr);
        mmc_out(ioaddr, 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)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, lp->hacr,
                 (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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr)) {
                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(ioaddr, lp->hacr,
                                  (char *) &psa.psa_encryption_select -
                                  (char *) &psa,
                                  (unsigned char *) &psa.
                                  psa_encryption_select, 8 + 1);

                        mmc_out(ioaddr, mmwoff(0, mmw_encr_enable),
                                MMW_ENCR_ENABLE_EN | MMW_ENCR_ENABLE_MODE);
                        mmc_write(ioaddr, 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(ioaddr, lp->hacr,
                                  (char *) &psa.psa_encryption_select -
                                  (char *) &psa,
                                  (unsigned char *) &psa.
                                  psa_encryption_select, 1);

                        mmc_out(ioaddr, mmwoff(0, mmw_encr_enable), 0);
                }
                /* update the Wavelan checksum */
                update_psa_checksum(dev, ioaddr, lp->hacr);
        }

        /* 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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr)) {
                ret = -EOPNOTSUPP;
        } else {
                /* Read the encryption key */
                psa_read(ioaddr, lp->hacr,
                         (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(ioaddr);

                /* 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;
}

/*------------------------------------------------------------------*/
/*
 * 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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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 = 1.6 * 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));
        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(ioaddr, mmroff(0, mmr_fee_status)) &
              (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) {
                range->num_channels = 10;
                range->num_frequency = wv_frequency_list(ioaddr, range->freq,
                                                        IW_MAX_FREQUENCIES);
        } else
                range->num_channels = range->num_frequency = 0;

        /* Encryption supported ? */
        if (mmc_encr(ioaddr)) {
                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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        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(ioaddr, lp->hacr,
                  (char *) &psa.psa_quality_thr - (char *) &psa,
                  (unsigned char *) &psa.psa_quality_thr, 1);
        /* update the Wavelan checksum */
        update_psa_checksum(dev, ioaddr, lp->hacr);
        mmc_out(ioaddr, 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)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;        /* lp is not unused */
        psa_t psa;
        unsigned long flags;

        /* Disable interrupts and save flags. */
        spin_lock_irqsave(&lp->spinlock, flags);
        
        psa_read(ioaddr, lp->hacr,
                 (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 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 = (net_local *) dev->priv;        /* lp is not unused */

        /* 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 = (net_local *) dev->priv;        /* lp is not unused */

        /* 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 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 */
        NULL,                           /* SIOCSIWMODE */
        NULL,                           /* SIOCGIWMODE */
        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 */
        NULL,                           /* SIOCSIWAP */
        NULL,                           /* SIOCGIWAP */
        NULL,                           /* -- hole -- */
        NULL,                           /* SIOCGIWAPLIST */
        NULL,                           /* -- hole -- */
        NULL,                           /* -- hole -- */
        NULL,                           /* SIOCSIWESSID */
        NULL,                           /* SIOCGIWESSID */
        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 */
        /* Bummer ! Why those are only at the end ??? */
        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 HISTOGRAM
        wavelan_set_histo,              /* SIOCIWFIRSTPRIV + 2 */
        wavelan_get_histo,              /* SIOCIWFIRSTPRIV + 3 */
#endif  /* HISTOGRAM */
};

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" },
  { SIOCSIPHISTO, IW_PRIV_TYPE_BYTE | 16,                    0, "sethisto" },
  { SIOCGIPHISTO, 0,                     IW_PRIV_TYPE_INT | 16, "gethisto" },
};

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 long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;
        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

        /* Check */
        if (lp == (net_local *) NULL)
                return (iw_stats *) NULL;
        
        /* Disable interrupts and save flags. */
        spin_lock_irqsave(&lp->spinlock, flags);
        
        wstats = &lp->wstats;

        /* Get data from the mmc. */
        mmc_out(ioaddr, mmwoff(0, mmw_freeze), 1);

        mmc_read(ioaddr, mmroff(0, mmr_dce_status), &m.mmr_dce_status, 1);
        mmc_read(ioaddr, mmroff(0, mmr_wrong_nwid_l), &m.mmr_wrong_nwid_l,
                 2);
        mmc_read(ioaddr, mmroff(0, mmr_thr_pre_set), &m.mmr_thr_pre_set,
                 4);

        mmc_out(ioaddr, 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;

        /* Enable interrupts and 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 deals with receiving the packets.
 * The interrupt handler gets an interrupt when a packet has been
 * successfully received and calls this part.
 */

/*------------------------------------------------------------------*/
/*
 * This routine does the actual copying 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, u16 buf_off, int sksize)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        struct sk_buff *skb;

#ifdef DEBUG_RX_TRACE
        printk(KERN_DEBUG "%s: ->wv_packet_read(0x%X, %d)\n",
               dev->name, buf_off, sksize);
#endif

        /* Allocate buffer for the data */
        if ((skb = dev_alloc_skb(sksize)) == (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++;
                return;
        }

        /* Copy the packet to the buffer. */
        obram_read(ioaddr, buf_off, 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 and associated stuff.
         * It seem a bit messy with all the define, but it's really
         * simple... */
        if (
#ifdef IW_WIRELESS_SPY          /* defined in iw_handler.h */
                   (lp->spy_data.spy_number > 0) ||
#endif /* IW_WIRELESS_SPY */
#ifdef HISTOGRAM
                   (lp->his_number > 0) ||
#endif /* HISTOGRAM */
                   0) {
                u8 stats[3];    /* signal level, noise level, signal quality */

                /* Read signal level, silence level and signal quality bytes */
                /* Note: in the PCMCIA hardware, these are part of the frame.
                 * It seems that for the ISA hardware, it's nowhere to be
                 * found in the frame, so I'm obliged to do this (it has a
                 * side effect on /proc/net/wireless).
                 * Any ideas?
                 */
                mmc_out(ioaddr, mmwoff(0, mmw_freeze), 1);
                mmc_read(ioaddr, mmroff(0, mmr_signal_lvl), stats, 3);
                mmc_out(ioaddr, mmwoff(0, mmw_freeze), 0);

#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

                /* Spying stuff */
#ifdef IW_WIRELESS_SPY
                wl_spy_gather(dev, skb_mac_header(skb) + WAVELAN_ADDR_SIZE,
                              stats);
#endif /* IW_WIRELESS_SPY */
#ifdef HISTOGRAM
                wl_his_gather(dev, stats);
#endif /* HISTOGRAM */
        }

        /*
         * Hand the packet to the network module.
         */
        netif_rx(skb);

        /* Keep statistics up to date */
        dev->last_rx = jiffies;
        lp->stats.rx_packets++;
        lp->stats.rx_bytes += sksize;

#ifdef DEBUG_RX_TRACE
        printk(KERN_DEBUG "%s: <-wv_packet_read()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * Transfer as many packets as we can
 * from the device RAM.
 * (called in wavelan_interrupt()).
 * Note : the spinlock is already grabbed for us.
 */
static void wv_receive(struct net_device * dev)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;
        fd_t fd;
        rbd_t rbd;
        int nreaped = 0;

#ifdef DEBUG_RX_TRACE
        printk(KERN_DEBUG "%s: ->wv_receive()\n", dev->name);
#endif

        /* Loop on each received packet. */
        for (;;) {
                obram_read(ioaddr, lp->rx_head, (unsigned char *) &fd,
                           sizeof(fd));

                /* Note about the status :
                 * It start up to be 0 (the value we set). Then, when the RU
                 * grab the buffer to prepare for reception, it sets the
                 * FD_STATUS_B flag. When the RU has finished receiving the
                 * frame, it clears FD_STATUS_B, set FD_STATUS_C to indicate
                 * completion and set the other flags to indicate the eventual
                 * errors. FD_STATUS_OK indicates that the reception was OK.
                 */

                /* If the current frame is not complete, we have reached the end. */
                if ((fd.fd_status & FD_STATUS_C) != FD_STATUS_C)
                        break;  /* This is how we exit the loop. */

                nreaped++;

                /* Check whether frame was correctly received. */
                if ((fd.fd_status & FD_STATUS_OK) == FD_STATUS_OK) {
                        /* Does the frame contain a pointer to the data?  Let's check. */
                        if (fd.fd_rbd_offset != I82586NULL) {
                                /* Read the receive buffer descriptor */
                                obram_read(ioaddr, fd.fd_rbd_offset,
                                           (unsigned char *) &rbd,
                                           sizeof(rbd));

#ifdef DEBUG_RX_ERROR
                                if ((rbd.rbd_status & RBD_STATUS_EOF) !=
                                    RBD_STATUS_EOF) printk(KERN_INFO
                                                           "%s: wv_receive(): missing EOF flag.\n",
                                                           dev->name);

                                if ((rbd.rbd_status & RBD_STATUS_F) !=
                                    RBD_STATUS_F) printk(KERN_INFO
                                                         "%s: wv_receive(): missing F flag.\n",
                                                         dev->name);
#endif                          /* DEBUG_RX_ERROR */

                                /* Read the packet and transmit to Linux */
                                wv_packet_read(dev, rbd.rbd_bufl,
                                               rbd.
                                               rbd_status &
                                               RBD_STATUS_ACNT);
                        }
#ifdef DEBUG_RX_ERROR
                        else    /* if frame has no data */
                                printk(KERN_INFO
                                       "%s: wv_receive(): frame has no data.\n",
                                       dev->name);
#endif
                } else {        /* If reception was no successful */

                        lp->stats.rx_errors++;

#ifdef DEBUG_RX_INFO
                        printk(KERN_DEBUG
                               "%s: wv_receive(): frame not received successfully (%X).\n",
                               dev->name, fd.fd_status);
#endif

#ifdef DEBUG_RX_ERROR
                        if ((fd.fd_status & FD_STATUS_S6) != 0)
                                printk(KERN_INFO
                                       "%s: wv_receive(): no EOF flag.\n",
                                       dev->name);
#endif

                        if ((fd.fd_status & FD_STATUS_S7) != 0) {
                                lp->stats.rx_length_errors++;
#ifdef DEBUG_RX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_receive(): frame too short.\n",
                                       dev->name);
#endif
                        }

                        if ((fd.fd_status & FD_STATUS_S8) != 0) {
                                lp->stats.rx_over_errors++;
#ifdef DEBUG_RX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_receive(): rx DMA overrun.\n",
                                       dev->name);
#endif
                        }

                        if ((fd.fd_status & FD_STATUS_S9) != 0) {
                                lp->stats.rx_fifo_errors++;
#ifdef DEBUG_RX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_receive(): ran out of resources.\n",
                                       dev->name);
#endif
                        }

                        if ((fd.fd_status & FD_STATUS_S10) != 0) {
                                lp->stats.rx_frame_errors++;
#ifdef DEBUG_RX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_receive(): alignment error.\n",
                                       dev->name);
#endif
                        }

                        if ((fd.fd_status & FD_STATUS_S11) != 0) {
                                lp->stats.rx_crc_errors++;
#ifdef DEBUG_RX_FAIL
                                printk(KERN_DEBUG
                                       "%s: wv_receive(): CRC error.\n",
                                       dev->name);
#endif
                        }
                }

                fd.fd_status = 0;
                obram_write(ioaddr, fdoff(lp->rx_head, fd_status),
                            (unsigned char *) &fd.fd_status,
                            sizeof(fd.fd_status));

                fd.fd_command = FD_COMMAND_EL;
                obram_write(ioaddr, fdoff(lp->rx_head, fd_command),
                            (unsigned char *) &fd.fd_command,
                            sizeof(fd.fd_command));

                fd.fd_command = 0;
                obram_write(ioaddr, fdoff(lp->rx_last, fd_command),
                            (unsigned char *) &fd.fd_command,
                            sizeof(fd.fd_command));

                lp->rx_last = lp->rx_head;
                lp->rx_head = fd.fd_link_offset;
        }                       /* for(;;) -> loop on all frames */

#ifdef DEBUG_RX_INFO
        if (nreaped > 1)
                printk(KERN_DEBUG "%s: wv_receive(): reaped %d\n",
                       dev->name, nreaped);
#endif
#ifdef DEBUG_RX_TRACE
        printk(KERN_DEBUG "%s: <-wv_receive()\n", dev->name);
#endif
}

/*********************** PACKET TRANSMISSION ***********************/
/*
 * This part deals with sending packets through the WaveLAN.
 *
 */

/*------------------------------------------------------------------*/
/*
 * This routine fills in the appropriate registers and memory
 * locations on the WaveLAN card and starts the card off on
 * the transmit.
 *
 * The principle:
 * Each block contains a transmit command, a NOP command,
 * a transmit block descriptor and a buffer.
 * The CU read the transmit block which point to the tbd,
 * read the tbd and the content of the buffer.
 * When it has finish with it, it goes to the next command
 * which in our case is the NOP. The NOP points on itself,
 * so the CU stop here.
 * When we add the next block, we modify the previous nop
 * to make it point on the new tx command.
 * Simple, isn't it ?
 *
 * (called in wavelan_packet_xmit())
 */
static int wv_packet_write(struct net_device * dev, void *buf, short length)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        unsigned short txblock;
        unsigned short txpred;
        unsigned short tx_addr;
        unsigned short nop_addr;
        unsigned short tbd_addr;
        unsigned short buf_addr;
        ac_tx_t tx;
        ac_nop_t nop;
        tbd_t tbd;
        int clen = length;
        unsigned long flags;

#ifdef DEBUG_TX_TRACE
        printk(KERN_DEBUG "%s: ->wv_packet_write(%d)\n", dev->name,
               length);
#endif

        spin_lock_irqsave(&lp->spinlock, flags);

        /* Check nothing bad has happened */
        if (lp->tx_n_in_use == (NTXBLOCKS - 1)) {
#ifdef DEBUG_TX_ERROR
                printk(KERN_INFO "%s: wv_packet_write(): Tx queue full.\n",
                       dev->name);
#endif
                spin_unlock_irqrestore(&lp->spinlock, flags);
                return 1;
        }

        /* Calculate addresses of next block and previous block. */
        txblock = lp->tx_first_free;
        txpred = txblock - TXBLOCKZ;
        if (txpred < OFFSET_CU)
                txpred += NTXBLOCKS * TXBLOCKZ;
        lp->tx_first_free += TXBLOCKZ;
        if (lp->tx_first_free >= OFFSET_CU + NTXBLOCKS * TXBLOCKZ)
                lp->tx_first_free -= NTXBLOCKS * TXBLOCKZ;

        lp->tx_n_in_use++;

        /* Calculate addresses of the different parts of the block. */
        tx_addr = txblock;
        nop_addr = tx_addr + sizeof(tx);
        tbd_addr = nop_addr + sizeof(nop);
        buf_addr = tbd_addr + sizeof(tbd);

        /*
         * Transmit command
         */
        tx.tx_h.ac_status = 0;
        obram_write(ioaddr, toff(ac_tx_t, tx_addr, tx_h.ac_status),
                    (unsigned char *) &tx.tx_h.ac_status,
                    sizeof(tx.tx_h.ac_status));

        /*
         * NOP command
         */
        nop.nop_h.ac_status = 0;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_status),
                    (unsigned char *) &nop.nop_h.ac_status,
                    sizeof(nop.nop_h.ac_status));
        nop.nop_h.ac_link = nop_addr;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_link),
                    (unsigned char *) &nop.nop_h.ac_link,
                    sizeof(nop.nop_h.ac_link));

        /*
         * Transmit buffer descriptor
         */
        tbd.tbd_status = TBD_STATUS_EOF | (TBD_STATUS_ACNT & clen);
        tbd.tbd_next_bd_offset = I82586NULL;
        tbd.tbd_bufl = buf_addr;
        tbd.tbd_bufh = 0;
        obram_write(ioaddr, tbd_addr, (unsigned char *) &tbd, sizeof(tbd));

        /*
         * Data
         */
        obram_write(ioaddr, buf_addr, buf, length);

        /*
         * Overwrite the predecessor NOP link
         * so that it points to this txblock.
         */
        nop_addr = txpred + sizeof(tx);
        nop.nop_h.ac_status = 0;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_status),
                    (unsigned char *) &nop.nop_h.ac_status,
                    sizeof(nop.nop_h.ac_status));
        nop.nop_h.ac_link = txblock;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_link),
                    (unsigned char *) &nop.nop_h.ac_link,
                    sizeof(nop.nop_h.ac_link));

        /* Make sure the watchdog will keep quiet for a while */
        dev->trans_start = jiffies;

        /* Keep stats up to date. */
        lp->stats.tx_bytes += length;

        if (lp->tx_first_in_use == I82586NULL)
                lp->tx_first_in_use = txblock;

        if (lp->tx_n_in_use < NTXBLOCKS - 1)
                netif_wake_queue(dev);

        spin_unlock_irqrestore(&lp->spinlock, flags);
        
#ifdef DEBUG_TX_INFO
        wv_packet_info((u8 *) 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

        return 0;
}

/*------------------------------------------------------------------*/
/*
 * 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 = (net_local *) dev->priv;
        unsigned long flags;
        char data[ETH_ZLEN];

#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.
         * 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_82586) {
                spin_lock_irqsave(&lp->spinlock, flags);
                wv_82586_config(dev);
                spin_unlock_irqrestore(&lp->spinlock, flags);
                /* Check that we can continue */
                if (lp->tx_n_in_use == (NTXBLOCKS - 1))
                        return 1;
        }
#ifdef DEBUG_TX_ERROR
        if (skb->next)
                printk(KERN_INFO "skb has next\n");
#endif

        /* Do 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->len < ETH_ZLEN) {
                memset(data, 0, ETH_ZLEN);
                skb_copy_from_linear_data(skb, data, skb->len);
                /* Write packet on the card */
                if(wv_packet_write(dev, data, ETH_ZLEN))
                        return 1;       /* We failed */
        }
        else if(wv_packet_write(dev, skb->data, skb->len))
                return 1;       /* We failed */


        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 does the real job of starting and configuring the hardware.
 */

/*--------------------------------------------------------------------*/
/*
 * Routine to initialize the Modem Management Controller.
 * (called by wv_hw_reset())
 */
static int wv_mmc_init(struct net_device * dev)
{
        unsigned long ioaddr = dev->base_addr;
        net_local *lp = (net_local *) dev->priv;
        psa_t psa;
        mmw_t m;
        int configured;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_mmc_init()\n", dev->name);
#endif

        /* Read the parameter storage area. */
        psa_read(ioaddr, lp->hacr, 0, (unsigned char *) &psa, sizeof(psa));

#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 later (with iwconfig). */
                psa.psa_nwid[0] = 0;
                psa.psa_nwid[1] = 0;

                /* no NWID checking since NWID is not set */
                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(ioaddr, lp->hacr,
                          (char *) psa.psa_nwid - (char *) &psa,
                          (unsigned char *) psa.psa_nwid, 4);
                psa_write(ioaddr, lp->hacr,
                          (char *) &psa.psa_thr_pre_set - (char *) &psa,
                          (unsigned char *) &psa.psa_thr_pre_set, 1);
                psa_write(ioaddr, lp->hacr,
                          (char *) &psa.psa_quality_thr - (char *) &psa,
                          (unsigned char *) &psa.psa_quality_thr, 1);
                psa_write(ioaddr, lp->hacr,
                          (char *) &psa.psa_conf_status - (char *) &psa,
                          (unsigned char *) &psa.psa_conf_status, 1);
                /* update the Wavelan checksum */
                update_psa_checksum(dev, ioaddr, lp->hacr);
#endif
        }

        /* 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_freeze = 0;
        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_decay_prm = 0;
        m.mmw_decay_updat_prm = 0;

        /* Write all info to MMC. */
        mmc_write(ioaddr, 0, (u8 *) & m, sizeof(m));

        /* The following code starts 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 up a bit and added 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 verifies that it is able to read a sensible
         * frequency from EEPROM (address 0x00) and that MMR_FEE_STATUS_ID
         * is 0xA (Xilinx version) or 0xB (Ariadne version).
         * My test is more crude but does work. */
        if (!(mmc_in(ioaddr, mmroff(0, mmr_fee_status)) &
              (MMR_FEE_STATUS_DWLD | MMR_FEE_STATUS_BUSY))) {
                /* We must download the frequency parameters to the
                 * synthesizers (from the EEPROM - area 1)
                 * Note: as the EEPROM is automatically 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(ioaddr, (char *) &m.mmw_fee_ctrl - (char *) &m,
                          (unsigned char *) &m.mmw_fee_ctrl, 2);

                /* Wait until the download is finished. */
                fee_wait(ioaddr, 100, 100);

#ifdef DEBUG_CONFIG_INFO
                /* The frequency was in the last word downloaded. */
                mmc_read(ioaddr, (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 synthesizers (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(ioaddr, (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 0;
}

/*------------------------------------------------------------------*/
/*
 * Construct the fd and rbd structures.
 * Start the receive unit.
 * (called by wv_hw_reset())
 */
static int wv_ru_start(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        u16 scb_cs;
        fd_t fd;
        rbd_t rbd;
        u16 rx;
        u16 rx_next;
        int i;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_ru_start()\n", dev->name);
#endif

        obram_read(ioaddr, scboff(OFFSET_SCB, scb_status),
                   (unsigned char *) &scb_cs, sizeof(scb_cs));
        if ((scb_cs & SCB_ST_RUS) == SCB_ST_RUS_RDY)
                return 0;

        lp->rx_head = OFFSET_RU;

        for (i = 0, rx = lp->rx_head; i < NRXBLOCKS; i++, rx = rx_next) {
                rx_next =
                    (i == NRXBLOCKS - 1) ? lp->rx_head : rx + RXBLOCKZ;

                fd.fd_status = 0;
                fd.fd_command = (i == NRXBLOCKS - 1) ? FD_COMMAND_EL : 0;
                fd.fd_link_offset = rx_next;
                fd.fd_rbd_offset = rx + sizeof(fd);
                obram_write(ioaddr, rx, (unsigned char *) &fd, sizeof(fd));

                rbd.rbd_status = 0;
                rbd.rbd_next_rbd_offset = I82586NULL;
                rbd.rbd_bufl = rx + sizeof(fd) + sizeof(rbd);
                rbd.rbd_bufh = 0;
                rbd.rbd_el_size = RBD_EL | (RBD_SIZE & MAXDATAZ);
                obram_write(ioaddr, rx + sizeof(fd),
                            (unsigned char *) &rbd, sizeof(rbd));

                lp->rx_last = rx;
        }

        obram_write(ioaddr, scboff(OFFSET_SCB, scb_rfa_offset),
                    (unsigned char *) &lp->rx_head, sizeof(lp->rx_head));

        scb_cs = SCB_CMD_RUC_GO;
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &scb_cs, sizeof(scb_cs));

        set_chan_attn(ioaddr, lp->hacr);

        for (i = 1000; i > 0; i--) {
                obram_read(ioaddr, scboff(OFFSET_SCB, scb_command),
                           (unsigned char *) &scb_cs, sizeof(scb_cs));
                if (scb_cs == 0)
                        break;

                udelay(10);
        }

        if (i <= 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wavelan_ru_start(): board not accepting command.\n",
                       dev->name);
#endif
                return -1;
        }
#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_ru_start()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * Initialise the transmit blocks.
 * Start the command unit executing the NOP
 * self-loop of the first transmit block.
 *
 * Here we create the list of send buffers used to transmit packets
 * between the PC and the command unit. For each buffer, we create a
 * buffer descriptor (pointing on the buffer), a transmit command
 * (pointing to the buffer descriptor) and a NOP command.
 * The transmit command is linked to the NOP, and the NOP to itself.
 * When we will have finished executing the transmit command, we will
 * then loop on the NOP. By releasing the NOP link to a new command,
 * we may send another buffer.
 *
 * (called by wv_hw_reset())
 */
static int wv_cu_start(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        int i;
        u16 txblock;
        u16 first_nop;
        u16 scb_cs;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_cu_start()\n", dev->name);
#endif

        lp->tx_first_free = OFFSET_CU;
        lp->tx_first_in_use = I82586NULL;

        for (i = 0, txblock = OFFSET_CU;
             i < NTXBLOCKS; i++, txblock += TXBLOCKZ) {
                ac_tx_t tx;
                ac_nop_t nop;
                tbd_t tbd;
                unsigned short tx_addr;
                unsigned short nop_addr;
                unsigned short tbd_addr;
                unsigned short buf_addr;

                tx_addr = txblock;
                nop_addr = tx_addr + sizeof(tx);
                tbd_addr = nop_addr + sizeof(nop);
                buf_addr = tbd_addr + sizeof(tbd);

                tx.tx_h.ac_status = 0;
                tx.tx_h.ac_command = acmd_transmit | AC_CFLD_I;
                tx.tx_h.ac_link = nop_addr;
                tx.tx_tbd_offset = tbd_addr;
                obram_write(ioaddr, tx_addr, (unsigned char *) &tx,
                            sizeof(tx));

                nop.nop_h.ac_status = 0;
                nop.nop_h.ac_command = acmd_nop;
                nop.nop_h.ac_link = nop_addr;
                obram_write(ioaddr, nop_addr, (unsigned char *) &nop,
                            sizeof(nop));

                tbd.tbd_status = TBD_STATUS_EOF;
                tbd.tbd_next_bd_offset = I82586NULL;
                tbd.tbd_bufl = buf_addr;
                tbd.tbd_bufh = 0;
                obram_write(ioaddr, tbd_addr, (unsigned char *) &tbd,
                            sizeof(tbd));
        }

        first_nop =
            OFFSET_CU + (NTXBLOCKS - 1) * TXBLOCKZ + sizeof(ac_tx_t);
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_cbl_offset),
                    (unsigned char *) &first_nop, sizeof(first_nop));

        scb_cs = SCB_CMD_CUC_GO;
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &scb_cs, sizeof(scb_cs));

        set_chan_attn(ioaddr, lp->hacr);

        for (i = 1000; i > 0; i--) {
                obram_read(ioaddr, scboff(OFFSET_SCB, scb_command),
                           (unsigned char *) &scb_cs, sizeof(scb_cs));
                if (scb_cs == 0)
                        break;

                udelay(10);
        }

        if (i <= 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wavelan_cu_start(): board not accepting command.\n",
                       dev->name);
#endif
                return -1;
        }

        lp->tx_n_in_use = 0;
        netif_start_queue(dev);
#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_cu_start()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * This routine does a standard configuration of the WaveLAN 
 * controller (i82586).
 *
 * It initialises the scp, iscp and scb structure
 * The first two are just pointers to the next.
 * The last one is used for basic configuration and for basic
 * communication (interrupt status).
 *
 * (called by wv_hw_reset())
 */
static int wv_82586_start(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        scp_t scp;              /* system configuration pointer */
        iscp_t iscp;            /* intermediate scp */
        scb_t scb;              /* system control block */
        ach_t cb;               /* Action command header */
        u8 zeroes[512];
        int i;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_82586_start()\n", dev->name);
#endif

        /*
         * Clear the onboard RAM.
         */
        memset(&zeroes[0], 0x00, sizeof(zeroes));
        for (i = 0; i < I82586_MEMZ; i += sizeof(zeroes))
                obram_write(ioaddr, i, &zeroes[0], sizeof(zeroes));

        /*
         * Construct the command unit structures:
         * scp, iscp, scb, cb.
         */
        memset(&scp, 0x00, sizeof(scp));
        scp.scp_sysbus = SCP_SY_16BBUS;
        scp.scp_iscpl = OFFSET_ISCP;
        obram_write(ioaddr, OFFSET_SCP, (unsigned char *) &scp,
                    sizeof(scp));

        memset(&iscp, 0x00, sizeof(iscp));
        iscp.iscp_busy = 1;
        iscp.iscp_offset = OFFSET_SCB;
        obram_write(ioaddr, OFFSET_ISCP, (unsigned char *) &iscp,
                    sizeof(iscp));

        /* Our first command is to reset the i82586. */
        memset(&scb, 0x00, sizeof(scb));
        scb.scb_command = SCB_CMD_RESET;
        scb.scb_cbl_offset = OFFSET_CU;
        scb.scb_rfa_offset = OFFSET_RU;
        obram_write(ioaddr, OFFSET_SCB, (unsigned char *) &scb,
                    sizeof(scb));

        set_chan_attn(ioaddr, lp->hacr);

        /* Wait for command to finish. */
        for (i = 1000; i > 0; i--) {
                obram_read(ioaddr, OFFSET_ISCP, (unsigned char *) &iscp,
                           sizeof(iscp));

                if (iscp.iscp_busy == (unsigned short) 0)
                        break;

                udelay(10);
        }

        if (i <= 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wv_82586_start(): iscp_busy timeout.\n",
                       dev->name);
#endif
                return -1;
        }

        /* Check command completion. */
        for (i = 15; i > 0; i--) {
                obram_read(ioaddr, OFFSET_SCB, (unsigned char *) &scb,
                           sizeof(scb));

                if (scb.scb_status == (SCB_ST_CX | SCB_ST_CNA))
                        break;

                udelay(10);
        }

        if (i <= 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wv_82586_start(): status: expected 0x%02x, got 0x%02x.\n",
                       dev->name, SCB_ST_CX | SCB_ST_CNA, scb.scb_status);
#endif
                return -1;
        }

        wv_ack(dev);

        /* Set the action command header. */
        memset(&cb, 0x00, sizeof(cb));
        cb.ac_command = AC_CFLD_EL | (AC_CFLD_CMD & acmd_diagnose);
        cb.ac_link = OFFSET_CU;
        obram_write(ioaddr, OFFSET_CU, (unsigned char *) &cb, sizeof(cb));

        if (wv_synchronous_cmd(dev, "diag()") == -1)
                return -1;

        obram_read(ioaddr, OFFSET_CU, (unsigned char *) &cb, sizeof(cb));
        if (cb.ac_status & AC_SFLD_FAIL) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wv_82586_start(): i82586 Self Test failed.\n",
                       dev->name);
#endif
                return -1;
        }
#ifdef DEBUG_I82586_SHOW
        wv_scb_show(ioaddr);
#endif

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_82586_start()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * This routine does a standard configuration of the WaveLAN
 * controller (i82586).
 *
 * This routine is a violent hack. We use the first free transmit block
 * to make our configuration. In the buffer area, we create the three
 * configuration commands (linked). We make the previous NOP point to
 * the beginning of the buffer instead of the tx command. After, we go
 * as usual to the NOP command.
 * Note that only the last command (mc_set) will generate an interrupt.
 *
 * (called by wv_hw_reset(), wv_82586_reconfig(), wavelan_packet_xmit())
 */
static void wv_82586_config(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        unsigned short txblock;
        unsigned short txpred;
        unsigned short tx_addr;
        unsigned short nop_addr;
        unsigned short tbd_addr;
        unsigned short cfg_addr;
        unsigned short ias_addr;
        unsigned short mcs_addr;
        ac_tx_t tx;
        ac_nop_t nop;
        ac_cfg_t cfg;           /* Configure action */
        ac_ias_t ias;           /* IA-setup action */
        ac_mcs_t mcs;           /* Multicast setup */
        struct dev_mc_list *dmi;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_82586_config()\n", dev->name);
#endif

        /* Check nothing bad has happened */
        if (lp->tx_n_in_use == (NTXBLOCKS - 1)) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO "%s: wv_82586_config(): Tx queue full.\n",
                       dev->name);
#endif
                return;
        }

        /* Calculate addresses of next block and previous block. */
        txblock = lp->tx_first_free;
        txpred = txblock - TXBLOCKZ;
        if (txpred < OFFSET_CU)
                txpred += NTXBLOCKS * TXBLOCKZ;
        lp->tx_first_free += TXBLOCKZ;
        if (lp->tx_first_free >= OFFSET_CU + NTXBLOCKS * TXBLOCKZ)
                lp->tx_first_free -= NTXBLOCKS * TXBLOCKZ;

        lp->tx_n_in_use++;

        /* Calculate addresses of the different parts of the block. */
        tx_addr = txblock;
        nop_addr = tx_addr + sizeof(tx);
        tbd_addr = nop_addr + sizeof(nop);
        cfg_addr = tbd_addr + sizeof(tbd_t);    /* beginning of the buffer */
        ias_addr = cfg_addr + sizeof(cfg);
        mcs_addr = ias_addr + sizeof(ias);

        /*
         * Transmit command
         */
        tx.tx_h.ac_status = 0xFFFF;     /* Fake completion value */
        obram_write(ioaddr, toff(ac_tx_t, tx_addr, tx_h.ac_status),
                    (unsigned char *) &tx.tx_h.ac_status,
                    sizeof(tx.tx_h.ac_status));

        /*
         * NOP command
         */
        nop.nop_h.ac_status = 0;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_status),
                    (unsigned char *) &nop.nop_h.ac_status,
                    sizeof(nop.nop_h.ac_status));
        nop.nop_h.ac_link = nop_addr;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_link),
                    (unsigned char *) &nop.nop_h.ac_link,
                    sizeof(nop.nop_h.ac_link));

        /* Create a configure action. */
        memset(&cfg, 0x00, sizeof(cfg));

        /*
         * For Linux we invert AC_CFG_ALOC() so as to conform
         * to the way that net packets reach us from above.
         * (See also ac_tx_t.)
         *
         * Updated from Wavelan Manual WCIN085B
         */
        cfg.cfg_byte_cnt =
            AC_CFG_BYTE_CNT(sizeof(ac_cfg_t) - sizeof(ach_t));
        cfg.cfg_fifolim = AC_CFG_FIFOLIM(4);
        cfg.cfg_byte8 = AC_CFG_SAV_BF(1) | AC_CFG_SRDY(0);
        cfg.cfg_byte9 = AC_CFG_ELPBCK(0) |
            AC_CFG_ILPBCK(0) |
            AC_CFG_PRELEN(AC_CFG_PLEN_2) |
            AC_CFG_ALOC(1) | AC_CFG_ADDRLEN(WAVELAN_ADDR_SIZE);
        cfg.cfg_byte10 = AC_CFG_BOFMET(1) |
            AC_CFG_ACR(6) | AC_CFG_LINPRIO(0);
        cfg.cfg_ifs = 0x20;
        cfg.cfg_slotl = 0x0C;
        cfg.cfg_byte13 = AC_CFG_RETRYNUM(15) | AC_CFG_SLTTMHI(0);
        cfg.cfg_byte14 = AC_CFG_FLGPAD(0) |
            AC_CFG_BTSTF(0) |
            AC_CFG_CRC16(0) |
            AC_CFG_NCRC(0) |
            AC_CFG_TNCRS(1) |
            AC_CFG_MANCH(0) |
            AC_CFG_BCDIS(0) | AC_CFG_PRM(lp->promiscuous);
        cfg.cfg_byte15 = AC_CFG_ICDS(0) |
            AC_CFG_CDTF(0) | AC_CFG_ICSS(0) | AC_CFG_CSTF(0);
/*
  cfg.cfg_min_frm_len = AC_CFG_MNFRM(64);
*/
        cfg.cfg_min_frm_len = AC_CFG_MNFRM(8);

        cfg.cfg_h.ac_command = (AC_CFLD_CMD & acmd_configure);
        cfg.cfg_h.ac_link = ias_addr;
        obram_write(ioaddr, cfg_addr, (unsigned char *) &cfg, sizeof(cfg));

        /* Set up the MAC address */
        memset(&ias, 0x00, sizeof(ias));
        ias.ias_h.ac_command = (AC_CFLD_CMD & acmd_ia_setup);
        ias.ias_h.ac_link = mcs_addr;
        memcpy(&ias.ias_addr[0], (unsigned char *) &dev->dev_addr[0],
               sizeof(ias.ias_addr));
        obram_write(ioaddr, ias_addr, (unsigned char *) &ias, sizeof(ias));

        /* Initialize adapter's Ethernet multicast addresses */
        memset(&mcs, 0x00, sizeof(mcs));
        mcs.mcs_h.ac_command = AC_CFLD_I | (AC_CFLD_CMD & acmd_mc_setup);
        mcs.mcs_h.ac_link = nop_addr;
        mcs.mcs_cnt = WAVELAN_ADDR_SIZE * lp->mc_count;
        obram_write(ioaddr, mcs_addr, (unsigned char *) &mcs, sizeof(mcs));

        /* Any address to set? */
        if (lp->mc_count) {
                for (dmi = dev->mc_list; dmi; dmi = dmi->next)
                        outsw(PIOP1(ioaddr), (u16 *) dmi->dmi_addr,
                              WAVELAN_ADDR_SIZE >> 1);

#ifdef DEBUG_CONFIG_INFO
 {
                DECLARE_MAC_BUF(mac);
                printk(KERN_DEBUG
                       "%s: wv_82586_config(): set %d multicast addresses:\n",
                       dev->name, lp->mc_count);
                for (dmi = dev->mc_list; dmi; dmi = dmi->next)
                        printk(KERN_DEBUG " %s\n",
                               print_mac(mac, dmi->dmi_addr));
 }
#endif
        }

        /*
         * Overwrite the predecessor NOP link
         * so that it points to the configure action.
         */
        nop_addr = txpred + sizeof(tx);
        nop.nop_h.ac_status = 0;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_status),
                    (unsigned char *) &nop.nop_h.ac_status,
                    sizeof(nop.nop_h.ac_status));
        nop.nop_h.ac_link = cfg_addr;
        obram_write(ioaddr, toff(ac_nop_t, nop_addr, nop_h.ac_link),
                    (unsigned char *) &nop.nop_h.ac_link,
                    sizeof(nop.nop_h.ac_link));

        /* Job done, clear the flag */
        lp->reconfig_82586 = 0;

        if (lp->tx_first_in_use == I82586NULL)
                lp->tx_first_in_use = txblock;

        if (lp->tx_n_in_use == (NTXBLOCKS - 1))
                netif_stop_queue(dev);

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_82586_config()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * This routine, called by wavelan_close(), gracefully stops the 
 * WaveLAN controller (i82586).
 * (called by wavelan_close())
 */
static void wv_82586_stop(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;
        u16 scb_cmd;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_82586_stop()\n", dev->name);
#endif

        /* Suspend both command unit and receive unit. */
        scb_cmd =
            (SCB_CMD_CUC & SCB_CMD_CUC_SUS) | (SCB_CMD_RUC &
                                               SCB_CMD_RUC_SUS);
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &scb_cmd, sizeof(scb_cmd));
        set_chan_attn(ioaddr, lp->hacr);

        /* No more interrupts */
        wv_ints_off(dev);

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_82586_stop()\n", dev->name);
#endif
}

/*------------------------------------------------------------------*/
/*
 * Totally reset the WaveLAN and restart it.
 * Performs the following actions:
 *      1. A power reset (reset DMA)
 *      2. Initialize the radio modem (using wv_mmc_init)
 *      3. Reset & Configure LAN controller (using wv_82586_start)
 *      4. Start the LAN controller's command unit
 *      5. Start the LAN controller's receive unit
 * (called by wavelan_interrupt(), wavelan_watchdog() & wavelan_open())
 */
static int wv_hw_reset(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long ioaddr = dev->base_addr;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: ->wv_hw_reset(dev=0x%x)\n", dev->name,
               (unsigned int) dev);
#endif

        /* Increase the number of resets done. */
        lp->nresets++;

        wv_hacr_reset(ioaddr);
        lp->hacr = HACR_DEFAULT;

        if ((wv_mmc_init(dev) < 0) || (wv_82586_start(dev) < 0))
                return -1;

        /* Enable the card to send interrupts. */
        wv_ints_on(dev);

        /* Start card functions */
        if (wv_cu_start(dev) < 0)
                return -1;

        /* Setup the controller and parameters */
        wv_82586_config(dev);

        /* Finish configuration with the receive unit */
        if (wv_ru_start(dev) < 0)
                return -1;

#ifdef DEBUG_CONFIG_TRACE
        printk(KERN_DEBUG "%s: <-wv_hw_reset()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * Check if there is a WaveLAN at the specific base address.
 * As a side effect, this reads the MAC address.
 * (called in wavelan_probe() and init_module())
 */
static int wv_check_ioaddr(unsigned long ioaddr, u8 * mac)
{
        int i;                  /* Loop counter */

        /* Check if the base address if available. */
        if (!request_region(ioaddr, sizeof(ha_t), "wavelan probe"))
                return -EBUSY;          /* ioaddr already used */

        /* Reset host interface */
        wv_hacr_reset(ioaddr);

        /* Read the MAC address from the parameter storage area. */
        psa_read(ioaddr, HACR_DEFAULT, psaoff(0, psa_univ_mac_addr),
                 mac, 6);

        release_region(ioaddr, sizeof(ha_t));

        /*
         * Check the first three octets of the address for the manufacturer's code.
         * Note: if this can't find your WaveLAN card, you've got a
         * non-NCR/AT&T/Lucent ISA card.  See wavelan.p.h for detail on
         * how to configure your card.
         */
        for (i = 0; i < ARRAY_SIZE(MAC_ADDRESSES); i++)
                if ((mac[0] == MAC_ADDRESSES[i][0]) &&
                    (mac[1] == MAC_ADDRESSES[i][1]) &&
                    (mac[2] == MAC_ADDRESSES[i][2]))
                        return 0;

#ifdef DEBUG_CONFIG_INFO
        printk(KERN_WARNING
               "WaveLAN (0x%3X): your MAC address might be %02X:%02X:%02X.\n",
               ioaddr, mac[0], mac[1], mac[2]);
#endif
        return -ENODEV;
}

/************************ INTERRUPT HANDLING ************************/

/*
 * This function is the interrupt handler for the WaveLAN card. This
 * routine will be called whenever: 
 */
static irqreturn_t wavelan_interrupt(int irq, void *dev_id)
{
        struct net_device *dev;
        unsigned long ioaddr;
        net_local *lp;
        u16 hasr;
        u16 status;
        u16 ack_cmd;

        dev = dev_id;

#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: ->wavelan_interrupt()\n", dev->name);
#endif

        lp = (net_local *) dev->priv;
        ioaddr = dev->base_addr;

#ifdef DEBUG_INTERRUPT_INFO
        /* Check state of our spinlock */
        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 concurrently.
         * It is safe because interrupts are disabled before acquiring
         * the spinlock. */
        spin_lock(&lp->spinlock);

        /* We always had spurious interrupts at startup, but lately I
         * saw them comming *between* the request_irq() and the
         * spin_lock_irqsave() in wavelan_open(), so the spinlock
         * protection is no enough.
         * So, we also check lp->hacr that will tell us is we enabled
         * irqs or not (see wv_ints_on()).
         * We can't use netif_running(dev) because we depend on the
         * proper processing of the irq generated during the config. */

        /* Which interrupt it is ? */
        hasr = hasr_read(ioaddr);

#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_INFO
               "%s: wavelan_interrupt(): hasr 0x%04x; hacr 0x%04x.\n",
               dev->name, hasr, lp->hacr);
#endif

        /* Check modem interrupt */
        if ((hasr & HASR_MMC_INTR) && (lp->hacr & HACR_MMC_INT_ENABLE)) {
                u8 dce_status;

                /*
                 * Interrupt from the modem management controller.
                 * This will clear it -- ignored for now.
                 */
                mmc_read(ioaddr, mmroff(0, mmr_dce_status), &dce_status,
                         sizeof(dce_status));

#ifdef DEBUG_INTERRUPT_ERROR
                printk(KERN_INFO
                       "%s: wavelan_interrupt(): unexpected mmc interrupt: status 0x%04x.\n",
                       dev->name, dce_status);
#endif
        }

        /* Check if not controller interrupt */
        if (((hasr & HASR_82586_INTR) == 0) ||
            ((lp->hacr & HACR_82586_INT_ENABLE) == 0)) {
#ifdef DEBUG_INTERRUPT_ERROR
                printk(KERN_INFO
                       "%s: wavelan_interrupt(): interrupt not coming from i82586 - hasr 0x%04x.\n",
                       dev->name, hasr);
#endif
                spin_unlock (&lp->spinlock);
                return IRQ_NONE;
        }

        /* Read interrupt data. */
        obram_read(ioaddr, scboff(OFFSET_SCB, scb_status),
                   (unsigned char *) &status, sizeof(status));

        /*
         * Acknowledge the interrupt(s).
         */
        ack_cmd = status & SCB_ST_INT;
        obram_write(ioaddr, scboff(OFFSET_SCB, scb_command),
                    (unsigned char *) &ack_cmd, sizeof(ack_cmd));
        set_chan_attn(ioaddr, lp->hacr);

#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_DEBUG "%s: wavelan_interrupt(): status 0x%04x.\n",
               dev->name, status);
#endif

        /* Command completed. */
        if ((status & SCB_ST_CX) == SCB_ST_CX) {
#ifdef DEBUG_INTERRUPT_INFO
                printk(KERN_DEBUG
                       "%s: wavelan_interrupt(): command completed.\n",
                       dev->name);
#endif
                wv_complete(dev, ioaddr, lp);
        }

        /* Frame received. */
        if ((status & SCB_ST_FR) == SCB_ST_FR) {
#ifdef DEBUG_INTERRUPT_INFO
                printk(KERN_DEBUG
                       "%s: wavelan_interrupt(): received packet.\n",
                       dev->name);
#endif
                wv_receive(dev);
        }

        /* Check the state of the command unit. */
        if (((status & SCB_ST_CNA) == SCB_ST_CNA) ||
            (((status & SCB_ST_CUS) != SCB_ST_CUS_ACTV) &&
             (netif_running(dev)))) {
#ifdef DEBUG_INTERRUPT_ERROR
                printk(KERN_INFO
                       "%s: wavelan_interrupt(): CU inactive -- restarting\n",
                       dev->name);
#endif
                wv_hw_reset(dev);
        }

        /* Check the state of the command unit. */
        if (((status & SCB_ST_RNR) == SCB_ST_RNR) ||
            (((status & SCB_ST_RUS) != SCB_ST_RUS_RDY) &&
             (netif_running(dev)))) {
#ifdef DEBUG_INTERRUPT_ERROR
                printk(KERN_INFO
                       "%s: wavelan_interrupt(): RU not ready -- restarting\n",
                       dev->name);
#endif
                wv_hw_reset(dev);
        }

        /* Release spinlock */
        spin_unlock (&lp->spinlock);

#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: <-wavelan_interrupt()\n", dev->name);
#endif
        return IRQ_HANDLED;
}

/*------------------------------------------------------------------*/
/*
 * 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.
 */
static void wavelan_watchdog(struct net_device *        dev)
{
        net_local *     lp = (net_local *)dev->priv;
        u_long          ioaddr = dev->base_addr;
        unsigned long   flags;
        unsigned int    nreaped;

#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

        /* Check that we came here for something */
        if (lp->tx_n_in_use <= 0) {
                return;
        }

        spin_lock_irqsave(&lp->spinlock, flags);

        /* Try to see if some buffers are not free (in case we missed
         * an interrupt */
        nreaped = wv_complete(dev, ioaddr, lp);

#ifdef DEBUG_INTERRUPT_INFO
        printk(KERN_DEBUG
               "%s: wavelan_watchdog(): %d reaped, %d remain.\n",
               dev->name, nreaped, lp->tx_n_in_use);
#endif

#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_I82586_SHOW
        wv_cu_show(dev);
#endif

        /* If no buffer has been freed */
        if (nreaped == 0) {
#ifdef DEBUG_INTERRUPT_ERROR
                printk(KERN_INFO
                       "%s: wavelan_watchdog(): cleanup failed, trying reset\n",
                       dev->name);
#endif
                wv_hw_reset(dev);
        }

        /* At this point, we should have some free Tx buffer ;-) */
        if (lp->tx_n_in_use < NTXBLOCKS - 1)
                netif_wake_queue(dev);

        spin_unlock_irqrestore(&lp->spinlock, flags);
        
#ifdef DEBUG_INTERRUPT_TRACE
        printk(KERN_DEBUG "%s: <-wavelan_watchdog()\n", dev->name);
#endif
}

/********************* CONFIGURATION CALLBACKS *********************/
/*
 * Here are the functions called by the Linux networking code (NET3)
 * for initialization, configuration and deinstallations of the 
 * WaveLAN ISA hardware.
 */

/*------------------------------------------------------------------*/
/*
 * Configure and start up the WaveLAN PCMCIA adaptor.
 * Called by NET3 when it "opens" the device.
 */
static int wavelan_open(struct net_device * dev)
{
        net_local *     lp = (net_local *)dev->priv;
        unsigned long   flags;

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: ->wavelan_open(dev=0x%x)\n", dev->name,
               (unsigned int) dev);
#endif

        /* Check irq */
        if (dev->irq == 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_WARNING "%s: wavelan_open(): no IRQ\n",
                       dev->name);
#endif
                return -ENXIO;
        }

        if (request_irq(dev->irq, &wavelan_interrupt, 0, "WaveLAN", dev) != 0) 
        {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_WARNING "%s: wavelan_open(): invalid IRQ\n",
                       dev->name);
#endif
                return -EAGAIN;
        }

        spin_lock_irqsave(&lp->spinlock, flags);
        
        if (wv_hw_reset(dev) != -1) {
                netif_start_queue(dev);
        } else {
                free_irq(dev->irq, dev);
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wavelan_open(): impossible to start the card\n",
                       dev->name);
#endif
                spin_unlock_irqrestore(&lp->spinlock, flags);
                return -EAGAIN;
        }
        spin_unlock_irqrestore(&lp->spinlock, flags);
        
#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: <-wavelan_open()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * Shut down the WaveLAN ISA card.
 * Called by NET3 when it "closes" the device.
 */
static int wavelan_close(struct net_device * dev)
{
        net_local *lp = (net_local *) dev->priv;
        unsigned long flags;

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: ->wavelan_close(dev=0x%x)\n", dev->name,
               (unsigned int) dev);
#endif

        netif_stop_queue(dev);

        /*
         * Flush the Tx and disable Rx.
         */
        spin_lock_irqsave(&lp->spinlock, flags);
        wv_82586_stop(dev);
        spin_unlock_irqrestore(&lp->spinlock, flags);

        free_irq(dev->irq, dev);

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: <-wavelan_close()\n", dev->name);
#endif
        return 0;
}

/*------------------------------------------------------------------*/
/*
 * Probe an I/O address, and if the WaveLAN is there configure the
 * device structure
 * (called by wavelan_probe() and via init_module()).
 */
static int __init wavelan_config(struct net_device *dev, unsigned short ioaddr)
{
        u8 irq_mask;
        int irq;
        net_local *lp;
        mac_addr mac;
        int err;

        if (!request_region(ioaddr, sizeof(ha_t), "wavelan"))
                return -EADDRINUSE;

        err = wv_check_ioaddr(ioaddr, mac);
        if (err)
                goto out;

        memcpy(dev->dev_addr, mac, 6);

        dev->base_addr = ioaddr;

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: ->wavelan_config(dev=0x%x, ioaddr=0x%lx)\n",
               dev->name, (unsigned int) dev, ioaddr);
#endif

        /* Check IRQ argument on command line. */
        if (dev->irq != 0) {
                irq_mask = wv_irq_to_psa(dev->irq);

                if (irq_mask == 0) {
#ifdef DEBUG_CONFIG_ERROR
                        printk(KERN_WARNING
                               "%s: wavelan_config(): invalid IRQ %d ignored.\n",
                               dev->name, dev->irq);
#endif
                        dev->irq = 0;
                } else {
#ifdef DEBUG_CONFIG_INFO
                        printk(KERN_DEBUG
                               "%s: wavelan_config(): changing IRQ to %d\n",
                               dev->name, dev->irq);
#endif
                        psa_write(ioaddr, HACR_DEFAULT,
                                  psaoff(0, psa_int_req_no), &irq_mask, 1);
                        /* update the Wavelan checksum */
                        update_psa_checksum(dev, ioaddr, HACR_DEFAULT);
                        wv_hacr_reset(ioaddr);
                }
        }

        psa_read(ioaddr, HACR_DEFAULT, psaoff(0, psa_int_req_no),
                 &irq_mask, 1);
        if ((irq = wv_psa_to_irq(irq_mask)) == -1) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_INFO
                       "%s: wavelan_config(): could not wavelan_map_irq(%d).\n",
                       dev->name, irq_mask);
#endif
                err = -EAGAIN;
                goto out;
        }

        dev->irq = irq;

        dev->mem_start = 0x0000;
        dev->mem_end = 0x0000;
        dev->if_port = 0;

        /* Initialize device structures */
        memset(dev->priv, 0, sizeof(net_local));
        lp = (net_local *) dev->priv;

        /* Back link to the device structure. */
        lp->dev = dev;
        /* Add the device at the beginning of the linked list. */
        lp->next = wavelan_list;
        wavelan_list = lp;

        lp->hacr = HACR_DEFAULT;

        /* Multicast stuff */
        lp->promiscuous = 0;
        lp->mc_count = 0;

        /* Init spinlock */
        spin_lock_init(&lp->spinlock);

        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;
        dev->tx_timeout         = &wavelan_watchdog;
        dev->watchdog_timeo     = WATCHDOG_JIFFIES;
#ifdef SET_MAC_ADDRESS
        dev->set_mac_address = &wavelan_set_mac_address;
#endif                          /* SET_MAC_ADDRESS */

        dev->wireless_handlers = &wavelan_handler_def;
        lp->wireless_data.spy_data = &lp->spy_data;
        dev->wireless_data = &lp->wireless_data;

        dev->mtu = WAVELAN_MTU;

        /* Display nice information. */
        wv_init_info(dev);

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG "%s: <-wavelan_config()\n", dev->name);
#endif
        return 0;
out:
        release_region(ioaddr, sizeof(ha_t));
        return err;
}

/*------------------------------------------------------------------*/
/*
 * Check for a network adaptor of this type.  Return '0' iff one 
 * exists.  There seem to be different interpretations of
 * the initial value of dev->base_addr.
 * We follow the example in drivers/net/ne.c.
 * (called in "Space.c")
 */
struct net_device * __init wavelan_probe(int unit)
{
        struct net_device *dev;
        short base_addr;
        int def_irq;
        int i;
        int r = 0;

        /* 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);
        BUILD_BUG_ON(sizeof(ha_t) != HA_SIZE);

        dev = alloc_etherdev(sizeof(net_local));
        if (!dev)
                return ERR_PTR(-ENOMEM);

        sprintf(dev->name, "eth%d", unit);
        netdev_boot_setup_check(dev);
        base_addr = dev->base_addr;
        def_irq = dev->irq;

#ifdef DEBUG_CALLBACK_TRACE
        printk(KERN_DEBUG
               "%s: ->wavelan_probe(dev=%p (base_addr=0x%x))\n",
               dev->name, dev, (unsigned int) dev->base_addr);
#endif

        /* Don't probe at all. */
        if (base_addr < 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_WARNING
                       "%s: wavelan_probe(): invalid base address\n",
                       dev->name);
#endif
                r = -ENXIO;
        } else if (base_addr > 0x100) { /* Check a single specified location. */
                r = wavelan_config(dev, base_addr);
#ifdef DEBUG_CONFIG_INFO
                if (r != 0)
                        printk(KERN_DEBUG
                               "%s: wavelan_probe(): no device at specified base address (0x%X) or address already in use\n",
                               dev->name, base_addr);
#endif

#ifdef DEBUG_CALLBACK_TRACE
                printk(KERN_DEBUG "%s: <-wavelan_probe()\n", dev->name);
#endif
        } else { /* Scan all possible addresses of the WaveLAN hardware. */
                for (i = 0; i < ARRAY_SIZE(iobase); i++) {
                        dev->irq = def_irq;
                        if (wavelan_config(dev, iobase[i]) == 0) {
#ifdef DEBUG_CALLBACK_TRACE
                                printk(KERN_DEBUG
                                       "%s: <-wavelan_probe()\n",
                                       dev->name);
#endif
                                break;
                        }
                }
                if (i == ARRAY_SIZE(iobase))
                        r = -ENODEV;
        }
        if (r) 
                goto out;
        r = register_netdev(dev);
        if (r)
                goto out1;
        return dev;
out1:
        release_region(dev->base_addr, sizeof(ha_t));
        wavelan_list = wavelan_list->next;
out:
        free_netdev(dev);
        return ERR_PTR(r);
}

/****************************** MODULE ******************************/
/*
 * Module entry point: insertion and removal
 */

#ifdef  MODULE
/*------------------------------------------------------------------*/
/*
 * Insertion of the module
 * I'm now quite proud of the multi-device support.
 */
int __init init_module(void)
{
        int ret = -EIO;         /* Return error if no cards found */
        int i;

#ifdef DEBUG_MODULE_TRACE
        printk(KERN_DEBUG "-> init_module()\n");
#endif

        /* If probing is asked */
        if (io[0] == 0) {
#ifdef DEBUG_CONFIG_ERROR
                printk(KERN_WARNING
                       "WaveLAN init_module(): doing device probing (bad !)\n");
                printk(KERN_WARNING
                       "Specify base addresses while loading module to correct the problem\n");
#endif

                /* Copy the basic set of address to be probed. */
                for (i = 0; i < ARRAY_SIZE(iobase); i++)
                        io[i] = iobase[i];
        }


        /* Loop on all possible base addresses. */
        i = -1;
        while ((io[++i] != 0) && (i < ARRAY_SIZE(io))) {
                struct net_device *dev = alloc_etherdev(sizeof(net_local));
                if (!dev)
                        break;
                if (name[i])
                        strcpy(dev->name, name[i]);     /* Copy name */
                dev->base_addr = io[i];
                dev->irq = irq[i];

                /* Check if there is something at this base address. */
                if (wavelan_config(dev, io[i]) == 0) {
                        if (register_netdev(dev) != 0) {
                                release_region(dev->base_addr, sizeof(ha_t));
                                wavelan_list = wavelan_list->next;
                        } else {
                                ret = 0;
                                continue;
                        }
                }
                free_netdev(dev);
        }

#ifdef DEBUG_CONFIG_ERROR
        if (!wavelan_list)
                printk(KERN_WARNING
                       "WaveLAN init_module(): no device found\n");
#endif

#ifdef DEBUG_MODULE_TRACE
        printk(KERN_DEBUG "<- init_module()\n");
#endif
        return ret;
}

/*------------------------------------------------------------------*/
/*
 * Removal of the module
 */
void cleanup_module(void)
{
#ifdef DEBUG_MODULE_TRACE
        printk(KERN_DEBUG "-> cleanup_module()\n");
#endif

        /* Loop on all devices and release them. */
        while (wavelan_list) {
                struct net_device *dev = wavelan_list->dev;

#ifdef DEBUG_CONFIG_INFO
                printk(KERN_DEBUG
                       "%s: cleanup_module(): removing device at 0x%x\n",
                       dev->name, (unsigned int) dev);
#endif
                unregister_netdev(dev);

                release_region(dev->base_addr, sizeof(ha_t));
                wavelan_list = wavelan_list->next;

                free_netdev(dev);
        }

#ifdef DEBUG_MODULE_TRACE
        printk(KERN_DEBUG "<- cleanup_module()\n");
#endif
}
#endif                          /* MODULE */
MODULE_LICENSE("GPL");

/*
 * This software may only be used and distributed
 * according to the terms of the GNU General Public License.
 *
 * This software was developed as a component of the
 * Linux operating system.
 * It is based on other device drivers and information
 * either written or supplied by:
 *      Ajay Bakre (bakre@paul.rutgers.edu),
 *      Donald Becker (becker@scyld.com),
 *      Loeke Brederveld (Loeke.Brederveld@Utrecht.NCR.com),
 *      Anders Klemets (klemets@it.kth.se),
 *      Vladimir V. Kolpakov (w@stier.koenig.ru),
 *      Marc Meertens (Marc.Meertens@Utrecht.NCR.com),
 *      Pauline Middelink (middelin@polyware.iaf.nl),
 *      Robert Morris (rtm@das.harvard.edu),
 *      Jean Tourrilhes (jt@hplb.hpl.hp.com),
 *      Girish Welling (welling@paul.rutgers.edu),
 *
 * Thanks go also to:
 *      James Ashton (jaa101@syseng.anu.edu.au),
 *      Alan Cox (alan@redhat.com),
 *      Allan Creighton (allanc@cs.usyd.edu.au),
 *      Matthew Geier (matthew@cs.usyd.edu.au),
 *      Remo di Giovanni (remo@cs.usyd.edu.au),
 *      Eckhard Grah (grah@wrcs1.urz.uni-wuppertal.de),
 *      Vipul Gupta (vgupta@cs.binghamton.edu),
 *      Mark Hagan (mhagan@wtcpost.daytonoh.NCR.COM),
 *      Tim Nicholson (tim@cs.usyd.edu.au),
 *      Ian Parkin (ian@cs.usyd.edu.au),
 *      John Rosenberg (johnr@cs.usyd.edu.au),
 *      George Rossi (george@phm.gov.au),
 *      Arthur Scott (arthur@cs.usyd.edu.au),
 *      Peter Storey,
 * for their assistance and advice.
 *
 * Please send bug reports, updates, comments to:
 *
 * Bruce Janson                                    Email:  bruce@cs.usyd.edu.au
 * Basser Department of Computer Science           Phone:  +61-2-9351-3423
 * University of Sydney, N.S.W., 2006, AUSTRALIA   Fax:    +61-2-9351-3838
 */