/* $Id$
 * bagetlance.c: Ethernet driver for VME Lance cards on Baget/MIPS
 *      This code stealed and adopted from linux/drivers/net/atarilance.c
 *      See that for author info
 *
 * Copyright (C) 1998 Gleb Raiko & Vladimir Roganov
 */

/* 
 * Driver code for Baget/Lance taken from atarilance.c, which also
 * works well in case of Besta. Most significant changes made here
 * related with 16BIT-only access to A24 space.
 */

static char *version = "bagetlance.c: v1.1 11/10/98\n";

#include <linux/module.h>

#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>

#include <asm/irq.h>
#include <asm/bitops.h>
#include <asm/io.h>

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include <asm/baget/baget.h>

#define BAGET_LANCE_IRQ  BAGET_IRQ_MASK(0xdf)

/*
 *  Define following if you don't need 16BIT-only access to Lance memory
 *  (Normally BAGET needs it)
 */
#undef NORMAL_MEM_ACCESS 

/* Debug level:
 *  0 = silent, print only serious errors
 *  1 = normal, print error messages
 *  2 = debug, print debug infos
 *  3 = debug, print even more debug infos (packet data)
 */

#define LANCE_DEBUG     1  

#ifdef LANCE_DEBUG
static int lance_debug = LANCE_DEBUG;
#else
static int lance_debug = 1;
#endif
MODULE_PARM(lance_debug, "i");
MODULE_PARM_DESC(lance_debug, "Lance debug level (0-3)");
MODULE_LICENSE("GPL");

/* Print debug messages on probing? */
#undef LANCE_DEBUG_PROBE

#define DPRINTK(n,a)                                                    \
        do {                                                                            \
                if (lance_debug >= n)                                   \
                        printk a;                                                       \
        } while( 0 )

#ifdef LANCE_DEBUG_PROBE
# define PROBE_PRINT(a) printk a
#else
# define PROBE_PRINT(a)
#endif

/* These define the number of Rx and Tx buffers as log2. (Only powers
 * of two are valid)
 * Much more rx buffers (32) are reserved than tx buffers (8), since receiving
 * is more time critical then sending and packets may have to remain in the
 * board's memory when main memory is low.
 */

/* Baget Lance has 64K on-board memory, so it looks we can't increase
   buffer quantity (40*1.5K is about 64K) */

#define TX_LOG_RING_SIZE                        3
#define RX_LOG_RING_SIZE                        5

/* These are the derived values */

#define TX_RING_SIZE                    (1 << TX_LOG_RING_SIZE)
#define TX_RING_LEN_BITS                (TX_LOG_RING_SIZE << 5)
#define TX_RING_MOD_MASK                (TX_RING_SIZE - 1)

#define RX_RING_SIZE                    (1 << RX_LOG_RING_SIZE)
#define RX_RING_LEN_BITS                (RX_LOG_RING_SIZE << 5)
#define RX_RING_MOD_MASK                (RX_RING_SIZE - 1)

/* The LANCE Rx and Tx ring descriptors. */
struct lance_rx_head {
        volatile unsigned short base;           /* Low word of base addr */
#ifdef NORMAL_MEM_ACCESS
       /* Following two fields are joined into one short to guarantee
                  16BIT access to Baget lance registers */
        volatile unsigned char  flag;
        unsigned char                   base_hi;        /* High word of base addr (unused) */
#else
/* Following macros are used as replecements to 8BIT fields */
#define GET_FLAG(h)    (((h)->flag_base_hi >> 8) & 0xff)
#define SET_FLAG(h,f)  (h)->flag_base_hi = ((h)->flag_base_hi & 0xff) | \
                                                                (((unsigned)(f)) << 8)
        volatile unsigned short flag_base_hi; 
#endif
        volatile short                  buf_length;     /* This length is 2s complement! */
        volatile short                  msg_length;     /* This length is "normal". */
};


struct lance_tx_head {
        volatile unsigned short base;           /* Low word of base addr */
#ifdef NORMAL_MEM_ACCESS 
/* See comments above about 8BIT-access Baget A24-space problems */
        volatile unsigned char  flag;
        unsigned char                   base_hi;        /* High word of base addr (unused) */
#else
        volatile unsigned short  flag_base_hi;
#endif
        volatile short                  length;         /* Length is 2s complement! */
        volatile short                  misc;
};

struct ringdesc {
        volatile unsigned short adr_lo;         /* Low 16 bits of address */
#ifdef NORMAL_MEM_ACCESS 
/* See comments above about 8BIT-access Bage A24-space problems */
        unsigned char   len;            /* Length bits */
        unsigned char   adr_hi;         /* High 8 bits of address (unused) */
#else
        volatile unsigned short  len_adr_hi;
#endif
};

/* The LANCE initialization block, described in databook. */
struct lance_init_block {
        unsigned short  mode;           /* Pre-set mode */
        unsigned char   hwaddr[6];      /* Physical ethernet address */
        unsigned                filter[2];      /* Multicast filter (unused). */
        /* Receive and transmit ring base, along with length bits. */
        struct ringdesc rx_ring;
        struct ringdesc tx_ring;
};

/* The whole layout of the Lance shared memory */
struct lance_memory {
        struct lance_init_block init;
        struct lance_tx_head    tx_head[TX_RING_SIZE];
        struct lance_rx_head    rx_head[RX_RING_SIZE];
        char                                    packet_area[0]; /* packet data follow after the
                                                                                         * init block and the ring
                                                                                         * descriptors and are located
                                                                                         * at runtime */
};

/* RieblCard specifics:
 * The original TOS driver for these cards reserves the area from offset
 * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the
 * Ethernet address there, and the magic for verifying the data's validity.
 * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe
 * is reserved for the interrupt vector number.
 */
#define RIEBL_RSVD_START        0xee70
#define RIEBL_RSVD_END          0xeec0
#define RIEBL_MAGIC                     0x09051990
#define RIEBL_MAGIC_ADDR        ((unsigned long *)(((char *)MEM) + 0xee8a))
#define RIEBL_HWADDR_ADDR       ((unsigned char *)(((char *)MEM) + 0xee8e))
#define RIEBL_IVEC_ADDR         ((unsigned short *)(((char *)MEM) + 0xfffe))

/* This is a default address for the old RieblCards without a battery
 * that have no ethernet address at boot time. 00:00:36:04 is the
 * prefix for Riebl cards, the 00:00 at the end is arbitrary.
 */

static unsigned char OldRieblDefHwaddr[6] = {
        0x00, 0x00, 0x36, 0x04, 0x00, 0x00
};

/* I/O registers of the Lance chip */

struct lance_ioreg {
/* base+0x0 */  volatile unsigned short data;
/* base+0x2 */  volatile unsigned short addr;
                                unsigned char                   _dummy1[3];
/* base+0x7 */  volatile unsigned char  ivec;
                                unsigned char                   _dummy2[5];
/* base+0xd */  volatile unsigned char  eeprom;
                                unsigned char                   _dummy3;
/* base+0xf */  volatile unsigned char  mem;
};

/* Types of boards this driver supports */

enum lance_type {
        OLD_RIEBL,              /* old Riebl card without battery */
        NEW_RIEBL,              /* new Riebl card with battery */
        PAM_CARD                /* PAM card with EEPROM */
};

static char *lance_names[] = {
        "Riebl-Card (without battery)",
        "Riebl-Card (with battery)",
        "PAM intern card"
};

/* The driver's private device structure */

struct lance_private {
        enum lance_type         cardtype;
        struct lance_ioreg      *iobase;
        struct lance_memory     *mem;
        int                                     cur_rx, cur_tx; /* The next free ring entry */
        int                                     dirty_tx;               /* Ring entries to be freed. */
                                                /* copy function */
        void                            *(*memcpy_f)( void *, const void *, size_t );
        struct net_device_stats stats;
/* These two must be longs for set_bit() */
        long                            tx_full;
        long                            lock;
};

/* I/O register access macros */

#define MEM             lp->mem
#define DREG    IO->data
#define AREG    IO->addr
#define REGA(a) ( AREG = (a), DREG )

/* Definitions for packet buffer access: */
#define PKT_BUF_SZ              1544
/* Get the address of a packet buffer corresponding to a given buffer head */
#define PKTBUF_ADDR(head)       (((unsigned char *)(MEM)) + (head)->base)

/* Possible memory/IO addresses for probing */

struct lance_addr {
        unsigned long   memaddr;
        unsigned long   ioaddr;
        int                             slow_flag;
} lance_addr_list[] = {
        { BAGET_LANCE_MEM_BASE, BAGET_LANCE_IO_BASE, 1 }        /* Baget Lance */
};

#define N_LANCE_ADDR    (sizeof(lance_addr_list)/sizeof(*lance_addr_list))


#define LANCE_HI_BASE (0xff & (BAGET_LANCE_MEM_BASE >> 16))

/* Definitions for the Lance */

/* tx_head flags */
#define TMD1_ENP                0x01    /* end of packet */
#define TMD1_STP                0x02    /* start of packet */
#define TMD1_DEF                0x04    /* deferred */
#define TMD1_ONE                0x08    /* one retry needed */
#define TMD1_MORE               0x10    /* more than one retry needed */
#define TMD1_ERR                0x40    /* error summary */
#define TMD1_OWN                0x80    /* ownership (set: chip owns) */

#define TMD1_OWN_CHIP   TMD1_OWN
#define TMD1_OWN_HOST   0

/* tx_head misc field */
#define TMD3_TDR                0x03FF  /* Time Domain Reflectometry counter */
#define TMD3_RTRY               0x0400  /* failed after 16 retries */
#define TMD3_LCAR               0x0800  /* carrier lost */
#define TMD3_LCOL               0x1000  /* late collision */
#define TMD3_UFLO               0x4000  /* underflow (late memory) */
#define TMD3_BUFF               0x8000  /* buffering error (no ENP) */

/* rx_head flags */
#define RMD1_ENP                0x01    /* end of packet */
#define RMD1_STP                0x02    /* start of packet */
#define RMD1_BUFF               0x04    /* buffer error */
#define RMD1_CRC                0x08    /* CRC error */
#define RMD1_OFLO               0x10    /* overflow */
#define RMD1_FRAM               0x20    /* framing error */
#define RMD1_ERR                0x40    /* error summary */
#define RMD1_OWN                0x80    /* ownership (set: ship owns) */

#define RMD1_OWN_CHIP   RMD1_OWN
#define RMD1_OWN_HOST   0

/* register names */
#define CSR0    0               /* mode/status */
#define CSR1    1               /* init block addr (low) */
#define CSR2    2               /* init block addr (high) */
#define CSR3    3               /* misc */
#define CSR8    8               /* address filter */
#define CSR15   15              /* promiscuous mode */

/* CSR0 */
/* (R=readable, W=writeable, S=set on write, C=clear on write) */
#define CSR0_INIT       0x0001          /* initialize (RS) */
#define CSR0_STRT       0x0002          /* start (RS) */
#define CSR0_STOP       0x0004          /* stop (RS) */
#define CSR0_TDMD       0x0008          /* transmit demand (RS) */
#define CSR0_TXON       0x0010          /* transmitter on (R) */
#define CSR0_RXON       0x0020          /* receiver on (R) */
#define CSR0_INEA       0x0040          /* interrupt enable (RW) */
#define CSR0_INTR       0x0080          /* interrupt active (R) */
#define CSR0_IDON       0x0100          /* initialization done (RC) */
#define CSR0_TINT       0x0200          /* transmitter interrupt (RC) */
#define CSR0_RINT       0x0400          /* receiver interrupt (RC) */
#define CSR0_MERR       0x0800          /* memory error (RC) */
#define CSR0_MISS       0x1000          /* missed frame (RC) */
#define CSR0_CERR       0x2000          /* carrier error (no heartbeat :-) (RC) */
#define CSR0_BABL       0x4000          /* babble: tx-ed too many bits (RC) */
#define CSR0_ERR        0x8000          /* error (RC) */

/* CSR3 */
#define CSR3_BCON       0x0001          /* byte control */
#define CSR3_ACON       0 // fixme: 0x0002              /* ALE control */
#define CSR3_BSWP       0x0004          /* byte swap (1=big endian) */



/***************************** Prototypes *****************************/

static int addr_accessible( volatile void *regp, int wordflag, int
                            writeflag );
static int lance_probe1( struct net_device *dev, struct lance_addr *init_rec );
static int lance_open( struct net_device *dev );
static void lance_init_ring( struct net_device *dev );
static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev );
static void lance_interrupt( int irq, void *dev_id, struct pt_regs *fp );
static int lance_rx( struct net_device *dev );
static int lance_close( struct net_device *dev );
static struct net_device_stats *lance_get_stats( struct net_device *dev );
static void set_multicast_list( struct net_device *dev );
static int lance_set_mac_address( struct net_device *dev, void *addr );

/************************* End of Prototypes **************************/

/* Network traffic statistic (bytes) */

int lance_stat = 0;

static void update_lance_stat (int len) {
                lance_stat += len;
}

/* 
   This function is used to access Baget/Lance memory to avoid 
   8/32BIT access to VAC A24 space 
   ALL memcpy calls was chenged to this function to avoid dbe problems
   Don't confuse with function name -- it stays from original code
*/

void *slow_memcpy( void *dst, const void *src, size_t len )

{       
        unsigned long to     = (unsigned long)dst;
        unsigned long from   = (unsigned long)src;
        unsigned long to_end = to +len;
        
        /* Unaligned flags */

        int odd_from   = from   & 1;
        int odd_to     = to     & 1;
        int odd_to_end = to_end & 1;

        /* Align for 16BIT-access first */

        register unsigned short *from_a   = (unsigned short*) (from   & ~1);
        register unsigned short *to_a     = (unsigned short*) (to     & ~1); 
        register unsigned short *to_end_a = (unsigned short*) (to_end & ~1);

        /* Caching values -- not in loop invariant */

        register unsigned short from_v; 
        register unsigned short to_v;

        /* Invariant is: from_a and to_a are pointers before or exactly to
           currently copying byte */

        if (odd_to) { 
                        /* First byte unaligned case */
                        from_v = *from_a;
                        to_v   = *to_a;

                        to_v &= ~0xff;
                        to_v |=  0xff & (from_v >> (odd_from ? 0 : 8));
                        *to_a++ = to_v;

                        if (odd_from) from_a++;
        }
    if (odd_from == odd_to) {
                        /* Same parity */
                        while (to_a + 7 < to_end_a) {
                                        unsigned long dummy1, dummy2;
                                        unsigned long reg1, reg2, reg3, reg4;

                                        __asm__ __volatile__(
                                        ".set\tnoreorder\n\t"
                                        ".set\tnoat\n\t"
                                        "lh\t%2,0(%1)\n\t"
                                        "nop\n\t"
                                         "lh\t%3,2(%1)\n\t"
                                        "sh\t%2,0(%0)\n\t"
                                           "lh\t%4,4(%1)\n\t"
                                         "sh\t%3,2(%0)\n\t"
                                            "lh\t%5,6(%1)\n\t"
                                           "sh\t%4,4(%0)\n\t"
                                        "lh\t%2,8(%1)\n\t"
                                            "sh\t%5,6(%0)\n\t"
                                         "lh\t%3,10(%1)\n\t"
                                        "sh\t%2,8(%0)\n\t"
                                          "lh\t%4,12(%1)\n\t"
                                         "sh\t%3,10(%0)\n\t"
                                            "lh\t%5,14(%1)\n\t"
                                          "sh\t%4,12(%0)\n\t"
                                         "nop\n\t"
                                            "sh\t%5,14(%0)\n\t"
                                        ".set\tat\n\t"
                                        ".set\treorder"
                                        :"=r" (dummy1), "=r" (dummy2),
                                        "=&r" (reg1), "=&r" (reg2), "=&r" (reg3), "=&r" (reg4)
                                        :"0" (to_a), "1" (from_a)
                                        :"memory");

                                        to_a   += 8;
                                        from_a += 8;

                        }
                        while (to_a < to_end_a) {
                                        *to_a++ = *from_a++;
                        }
        } else {
                        /* Different parity */
                        from_v = *from_a;
                        while (to_a < to_end_a) {
                                        unsigned short from_v_next;
                                        from_v_next = *++from_a;
                                        *to_a++ = ((from_v & 0xff)<<8) | ((from_v_next>>8) & 0xff);
                                        from_v = from_v_next; 
                        }

        }
        if (odd_to_end) {
                        /* Last byte unaligned case */
                        to_v = *to_a;
                        from_v = *from_a;

                        to_v &= ~0xff00;
                        if (odd_from == odd_to) {
                                        to_v |= from_v & 0xff00;
                        } else {
                                        to_v |= (from_v<<8) & 0xff00;
                        }

                        *to_a = to_v;
        }

        update_lance_stat( len );

        return( dst );
}


int __init bagetlance_probe( struct net_device *dev )

{       int i;
        static int found;

        SET_MODULE_OWNER(dev);

        if (found)
                /* Assume there's only one board possible... That seems true, since
                 * the Riebl/PAM board's address cannot be changed. */
                return( -ENODEV );

        for( i = 0; i < N_LANCE_ADDR; ++i ) {
                if (lance_probe1( dev, &lance_addr_list[i] )) {
                        found = 1;
                        return( 0 );
                }
        }

        return( -ENODEV );
}



/* Derived from hwreg_present() in vme/config.c: */

static int __init addr_accessible( volatile void *regp, 
                                   int wordflag, 
                                   int writeflag )
{       
                /* We have a fine function to do it */
                extern int try_read(unsigned long, int);
                return try_read((unsigned long)regp, sizeof(short)) != -1;   
}



/* Original atari driver uses it */
#define IRQ_TYPE_PRIO SA_INTERRUPT
#define IRQ_SOURCE_TO_VECTOR(x) (x)

static int __init lance_probe1( struct net_device *dev,
                                struct lance_addr *init_rec )

{       volatile unsigned short *memaddr =
                (volatile unsigned short *)init_rec->memaddr;
        volatile unsigned short *ioaddr =
                (volatile unsigned short *)init_rec->ioaddr;
        struct lance_private    *lp;
        struct lance_ioreg              *IO;
        int                                     i;
        static int                              did_version;
        unsigned short                  save1, save2;

        PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n",
                                  (long)memaddr, (long)ioaddr ));

        /* Test whether memory readable and writable */
        PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" ));
        if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail;

        if ((unsigned long)memaddr >= KSEG2) {
                        extern int kseg2_alloc_io (unsigned long addr, unsigned long size);
                        if (kseg2_alloc_io((unsigned long)memaddr, BAGET_LANCE_MEM_SIZE)) {
                                        printk("bagetlance: unable map lance memory\n");
                                        goto probe_fail;
                        }
        }

        /* Written values should come back... */
        PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" ));
        save1 = *memaddr;
        *memaddr = 0x0001;
        if (*memaddr != 0x0001) goto probe_fail;
        PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" ));
        *memaddr = 0x0000;
        if (*memaddr != 0x0000) goto probe_fail;
        *memaddr = save1;

        /* First port should be readable and writable */
        PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" ));
        if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail;

        /* and written values should be readable */
        PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" ));
        save2 = ioaddr[1];
        ioaddr[1] = 0x0001;
        if (ioaddr[1] != 0x0001) goto probe_fail;

        /* The CSR0_INIT bit should not be readable */
        PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" ));
        save1 = ioaddr[0];
        ioaddr[1] = CSR0;
        ioaddr[0] = CSR0_INIT | CSR0_STOP;
        if (ioaddr[0] != CSR0_STOP) {
                ioaddr[0] = save1;
                ioaddr[1] = save2;
                goto probe_fail;
        }
        PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" ));
        ioaddr[0] = CSR0_STOP;
        if (ioaddr[0] != CSR0_STOP) {
                ioaddr[0] = save1;
                ioaddr[1] = save2;
                goto probe_fail;
        }

        /* Now ok... */
        PROBE_PRINT(( "lance_probe1: Lance card detected\n" ));
        goto probe_ok;

  probe_fail:
        return( 0 );

  probe_ok:
        init_etherdev( dev, sizeof(struct lance_private) );
        if (!dev->priv) {
                dev->priv = kmalloc( sizeof(struct lance_private), GFP_KERNEL );
                if (!dev->priv)
                        return 0;
        }
        lp = (struct lance_private *)dev->priv;
        MEM = (struct lance_memory *)memaddr;
        IO = lp->iobase = (struct lance_ioreg *)ioaddr;
        dev->base_addr = (unsigned long)ioaddr; /* informational only */
        lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy;

        REGA( CSR0 ) = CSR0_STOP;

        /* Now test for type: If the eeprom I/O port is readable, it is a
         * PAM card */
        if (addr_accessible( &(IO->eeprom), 0, 0 )) {
                /* Switch back to Ram */
                i = IO->mem;
                lp->cardtype = PAM_CARD;
        }
#ifdef NORMAL_MEM_ACCESS
        else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) {
#else
        else if (({
                        unsigned short *a = (unsigned short*)RIEBL_MAGIC_ADDR;
                    (((int)a[0]) << 16) + ((int)a[1]) == RIEBL_MAGIC;
        })) {
#endif
                lp->cardtype = NEW_RIEBL;
        }
        else
                lp->cardtype = OLD_RIEBL;

        if (lp->cardtype == PAM_CARD ||
                memaddr == (unsigned short *)0xffe00000) {
                /* PAMs card and Riebl on ST use level 5 autovector */
                request_irq(BAGET_LANCE_IRQ, lance_interrupt, IRQ_TYPE_PRIO,
                            "PAM/Riebl-ST Ethernet", dev);
                dev->irq = (unsigned short)BAGET_LANCE_IRQ;
        }
        else {
                /* For VME-RieblCards, request a free VME int;
                 * (This must be unsigned long, since dev->irq is short and the
                 * IRQ_MACHSPEC bit would be cut off...)
                 */
                unsigned long irq = BAGET_LANCE_IRQ; 
                if (!irq) {
                        printk( "Lance: request for VME interrupt failed\n" );
                        return( 0 );
                }
                request_irq(irq, lance_interrupt, IRQ_TYPE_PRIO,
                            "Riebl-VME Ethernet", dev);
                dev->irq = irq;
        }

        printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ",
                   dev->name, lance_names[lp->cardtype],
                   (unsigned long)ioaddr,
                   (unsigned long)memaddr,
                   dev->irq,
                   init_rec->slow_flag ? " (slow memcpy)" : "" );

        /* Get the ethernet address */
        switch( lp->cardtype ) {
          case OLD_RIEBL:
                /* No ethernet address! (Set some default address) */
                slow_memcpy( dev->dev_addr, OldRieblDefHwaddr, 6 );
                break;
          case NEW_RIEBL:
                lp->memcpy_f( dev->dev_addr, RIEBL_HWADDR_ADDR, 6 );
                break;
          case PAM_CARD:
                i = IO->eeprom;
                for( i = 0; i < 6; ++i )
                        dev->dev_addr[i] =
                                ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) |
                                ((((unsigned short *)MEM)[i*2+1] & 0x0f));
                i = IO->mem;
                break;
        }
        for( i = 0; i < 6; ++i )
                printk( "%02x%s", dev->dev_addr[i], (i < 5) ? ":" : "\n" );
        if (lp->cardtype == OLD_RIEBL) {
                printk( "%s: Warning: This is a default ethernet address!\n",
                                dev->name );
                printk( "      Use \"ifconfig hw ether ...\" to set the address.\n" );
        }

        MEM->init.mode = 0x0000;                /* Disable Rx and Tx. */

        {
                        unsigned char hwaddr[6];
                        for( i = 0; i < 6; i++ ) 
                                        hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
                        slow_memcpy(MEM->init.hwaddr, hwaddr, sizeof(hwaddr));
        }

        MEM->init.filter[0] = 0x00000000;
        MEM->init.filter[1] = 0x00000000;
        MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head );

#ifdef NORMAL_MEM_ACCESS
        MEM->init.rx_ring.adr_hi = LANCE_HI_BASE; 
        MEM->init.rx_ring.len    = RX_RING_LEN_BITS;
#else
        MEM->init.rx_ring.len_adr_hi = 
                        ((unsigned)RX_RING_LEN_BITS << 8) | LANCE_HI_BASE;
#endif


        MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head );

#ifdef NORMAL_MEM_ACCESS
        MEM->init.tx_ring.adr_hi = LANCE_HI_BASE; 
        MEM->init.tx_ring.len    = TX_RING_LEN_BITS;
#else
        MEM->init.tx_ring.len_adr_hi = 
                        ((unsigned)TX_RING_LEN_BITS<<8) | LANCE_HI_BASE;
#endif

        if (lp->cardtype == PAM_CARD)
                IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq);
        else
                *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq);

        if (did_version++ == 0)
                DPRINTK( 1, ( version ));

        /* The LANCE-specific entries in the device structure. */
        dev->open = &lance_open;
        dev->hard_start_xmit = &lance_start_xmit;
        dev->stop = &lance_close;
        dev->get_stats = &lance_get_stats;
        dev->set_multicast_list = &set_multicast_list;
        dev->set_mac_address = &lance_set_mac_address;
        dev->start = 0;

        memset( &lp->stats, 0, sizeof(lp->stats) );

        return( 1 );
}


static int lance_open( struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        struct lance_ioreg       *IO = lp->iobase;
        int i;

        DPRINTK( 2, ( "%s: lance_open()\n", dev->name ));

        lance_init_ring(dev);
        /* Re-initialize the LANCE, and start it when done. */

        REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
        REGA( CSR2 ) = 0;
        REGA( CSR1 ) = 0;
        REGA( CSR0 ) = CSR0_INIT;
        /* From now on, AREG is kept to point to CSR0 */

        i = 1000000;
        while (--i > 0)
                if (DREG & CSR0_IDON)
                        break;
        if (i < 0 || (DREG & CSR0_ERR)) {
                DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n",
                                          dev->name, i, DREG ));
                DREG = CSR0_STOP;
                return( -EIO );
        }
        DREG = CSR0_IDON;
        DREG = CSR0_STRT;
        DREG = CSR0_INEA;

        dev->tbusy = 0;
        dev->interrupt = 0;
        dev->start = 1;

        DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG ));
        return( 0 );
}


/* Initialize the LANCE Rx and Tx rings. */

static void lance_init_ring( struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        int i;
        unsigned offset;

        lp->lock = 0;
        lp->tx_full = 0;
        lp->cur_rx = lp->cur_tx = 0;
        lp->dirty_tx = 0;

        offset = offsetof( struct lance_memory, packet_area );

/* If the packet buffer at offset 'o' would conflict with the reserved area
 * of RieblCards, advance it */
#define CHECK_OFFSET(o)                                                                                                          \
        do {                                                                                                                                     \
                if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) {            \
                        if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \
                                                                                 : (o) < RIEBL_RSVD_END)                         \
                                (o) = RIEBL_RSVD_END;                                                                            \
                }                                                                                                                                        \
        } while(0)

        for( i = 0; i < TX_RING_SIZE; i++ ) {
                CHECK_OFFSET(offset);
                MEM->tx_head[i].base = offset;
#ifdef NORMAL_MEM_ACCESS
                MEM->tx_head[i].flag = TMD1_OWN_HOST;
                MEM->tx_head[i].base_hi = LANCE_HI_BASE;
#else
                MEM->tx_head[i].flag_base_hi = 
                                (TMD1_OWN_HOST<<8) | LANCE_HI_BASE;
#endif
                MEM->tx_head[i].length = 0;
                MEM->tx_head[i].misc = 0;
                offset += PKT_BUF_SZ;
        }

        for( i = 0; i < RX_RING_SIZE; i++ ) {
                CHECK_OFFSET(offset);
                MEM->rx_head[i].base = offset;
#ifdef NORMAL_MEM_ACCESS
                MEM->rx_head[i].flag = TMD1_OWN_CHIP;
                MEM->rx_head[i].base_hi = LANCE_HI_BASE; 
#else
                MEM->rx_head[i].flag_base_hi = 
                                (TMD1_OWN_CHIP<<8) | LANCE_HI_BASE;
#endif
                MEM->rx_head[i].buf_length = -PKT_BUF_SZ;
                MEM->rx_head[i].msg_length = 0;
                offset += PKT_BUF_SZ;
        }
}


static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        struct lance_ioreg       *IO = lp->iobase;
        int entry, len;
        struct lance_tx_head *head;
        unsigned long flags;

        /* Transmitter timeout, serious problems. */
        if (dev->tbusy) {
                int tickssofar = jiffies - dev->trans_start;
                if (tickssofar < 20)
                        return( 1 );
                AREG = CSR0;
                DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
                                          dev->name, DREG ));
                DREG = CSR0_STOP;
                /*
                 * Always set BSWP after a STOP as STOP puts it back into
                 * little endian mode.
                 */
                REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);
                lp->stats.tx_errors++;
#ifndef final_version
                {       int i;
                        DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n",
                                                  lp->dirty_tx, lp->cur_tx,
                                                  lp->tx_full ? " (full)" : "",
                                                  lp->cur_rx ));
                        for( i = 0 ; i < RX_RING_SIZE; i++ )
                                DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n",
                                                          i, MEM->rx_head[i].base,
                                                          -MEM->rx_head[i].buf_length,
                                                          MEM->rx_head[i].msg_length ));
                        for( i = 0 ; i < TX_RING_SIZE; i++ )
                                DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n",
                                                          i, MEM->tx_head[i].base,
                                                          -MEM->tx_head[i].length,
                                                          MEM->tx_head[i].misc ));
                }
#endif
                lance_init_ring(dev);
                REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;

                dev->tbusy = 0;
                dev->trans_start = jiffies;

                return( 0 );
        }

        DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n",
                                  dev->name, DREG ));

        /* Block a timer-based transmit from overlapping.  This could better be
           done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
        if (test_and_set_bit( 0, (void*)&dev->tbusy ) != 0) {
                DPRINTK( 0, ( "%s: Transmitter access conflict.\n", dev->name ));
                return 1;
        }

        if (test_and_set_bit( 0, (void*)&lp->lock ) != 0) {
                DPRINTK( 0, ( "%s: tx queue lock!.\n", dev->name ));
                /* don't clear dev->tbusy flag. */
                return 1;
        }

        /* Fill in a Tx ring entry */
        if (lance_debug >= 3) {
                u_char *p;
                int i;
                printk( "%s: TX pkt type 0x%04x from ", dev->name,
                                ((u_short *)skb->data)[6]);
                for( p = &((u_char *)skb->data)[6], i = 0; i < 6; i++ )
                        printk("%02x%s", *p++, i != 5 ? ":" : "" );
                printk(" to ");
                for( p = (u_char *)skb->data, i = 0; i < 6; i++ )
                        printk("%02x%s", *p++, i != 5 ? ":" : "" );
                printk(" data at 0x%08x len %d\n", (int)skb->data,
                           (int)skb->len );
        }

        /* We're not prepared for the int until the last flags are set/reset. And
         * the int may happen already after setting the OWN_CHIP... */
        save_flags(flags);
        cli();

        /* Mask to ring buffer boundary. */
        entry = lp->cur_tx & TX_RING_MOD_MASK;
        head  = &(MEM->tx_head[entry]);

        /* Caution: the write order is important here, set the "ownership" bits
         * last.
         */

        /* The old LANCE chips doesn't automatically pad buffers to min. size. */
        len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
        /* PAM-Card has a bug: Can only send packets with even number of bytes! */
        if (lp->cardtype == PAM_CARD && (len & 1))
                ++len;

        head->length = -len;
        head->misc = 0;
        lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len );
#ifdef NORMAL_MEM_ACCESS
        head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP;
#else
    SET_FLAG(head,(TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP));
#endif
        lp->stats.tx_bytes += skb->len;
        dev_kfree_skb( skb );
        lp->cur_tx++;
        while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) {
                lp->cur_tx -= TX_RING_SIZE;
                lp->dirty_tx -= TX_RING_SIZE;
        }

        /* Trigger an immediate send poll. */
        DREG = CSR0_INEA | CSR0_TDMD;
        dev->trans_start = jiffies;

        lp->lock = 0;
#ifdef NORMAL_MEM_ACCESS
        if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==
#else
        if ((GET_FLAG(&MEM->tx_head[(entry+1) & TX_RING_MOD_MASK]) & TMD1_OWN) ==
#endif
                TMD1_OWN_HOST)
                dev->tbusy = 0;
        else
                lp->tx_full = 1;
        restore_flags(flags);

        return 0;
}

/* The LANCE interrupt handler. */

static void lance_interrupt( int irq, void *dev_id, struct pt_regs *fp)
{
        struct net_device *dev = dev_id;
        struct lance_private *lp;
        struct lance_ioreg       *IO;
        int csr0, boguscnt = 10;

        if (dev == NULL) {
                DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" ));
                return;
        }

        lp = (struct lance_private *)dev->priv;
        IO = lp->iobase;
        AREG = CSR0;

        if (dev->interrupt) {
                        DPRINTK( 1, ( "Re-entering CAUSE=%08x STATUS=%08x\n",  
                                                  read_32bit_cp0_register(CP0_CAUSE),  
                                                  read_32bit_cp0_register(CP0_STATUS) ));
                        panic("lance: interrupt handler reentered !");
        }

        dev->interrupt = 1;

        while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) &&
                   --boguscnt >= 0) {
                /* Acknowledge all of the current interrupt sources ASAP. */
                DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP |
                                                                        CSR0_TDMD | CSR0_INEA);

                DPRINTK( 2, ( "%s: interrupt  csr0=%04x new csr=%04x.\n",
                                          dev->name, csr0, DREG ));

                if (csr0 & CSR0_RINT)                   /* Rx interrupt */

                        lance_rx( dev );

                if (csr0 & CSR0_TINT) {                 /* Tx-done interrupt */
                        int dirty_tx = lp->dirty_tx;

                        while( dirty_tx < lp->cur_tx) {
                                int entry = dirty_tx & TX_RING_MOD_MASK;
#ifdef NORMAL_MEM_ACCESS
                                int status = MEM->tx_head[entry].flag;
#else
                                int status = GET_FLAG(&MEM->tx_head[entry]);
#endif
                                if (status & TMD1_OWN_CHIP)
                                        break;                  /* It still hasn't been Txed */

#ifdef NORMAL_MEM_ACCESS
                                MEM->tx_head[entry].flag = 0;
#else
                                SET_FLAG(&MEM->tx_head[entry],0);
#endif

                                if (status & TMD1_ERR) {
                                        /* There was an major error, log it. */
                                        int err_status = MEM->tx_head[entry].misc;
                                        lp->stats.tx_errors++;
                                        if (err_status & TMD3_RTRY) lp->stats.tx_aborted_errors++;
                                        if (err_status & TMD3_LCAR) lp->stats.tx_carrier_errors++;
                                        if (err_status & TMD3_LCOL) lp->stats.tx_window_errors++;
                                        if (err_status & TMD3_UFLO) {
                                                /* Ackk!  On FIFO errors the Tx unit is turned off! */
                                                lp->stats.tx_fifo_errors++;
                                                /* Remove this verbosity later! */
                                                DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n",
                                                                          dev->name, csr0 ));
                                                /* Restart the chip. */
                                                DREG = CSR0_STRT;
                                        }
                                } else {
                                        if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF))
                                                lp->stats.collisions++;
                                        lp->stats.tx_packets++;
                                }
                                dirty_tx++;
                        }

#ifndef final_version
                        if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) {
                                DPRINTK( 0, ( "out-of-sync dirty pointer,"
                                                          " %d vs. %d, full=%d.\n",
                                                          dirty_tx, lp->cur_tx, lp->tx_full ));
                                dirty_tx += TX_RING_SIZE;
                        }
#endif

                        if (lp->tx_full && dev->tbusy
                                && dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) {
                                /* The ring is no longer full, clear tbusy. */
                                lp->tx_full = 0;
                                dev->tbusy = 0;
                                mark_bh( NET_BH );
                        }

                        lp->dirty_tx = dirty_tx;
                }

                /* Log misc errors. */
                if (csr0 & CSR0_BABL) lp->stats.tx_errors++; /* Tx babble. */
                if (csr0 & CSR0_MISS) lp->stats.rx_errors++; /* Missed a Rx frame. */
                if (csr0 & CSR0_MERR) {
                        DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), "
                                                  "status %04x.\n", dev->name, csr0 ));
                        /* Restart the chip. */
                        DREG = CSR0_STRT;
                }
        }

    /* Clear any other interrupt, and set interrupt enable. */
        DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR |
                   CSR0_IDON | CSR0_INEA;

        DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n",
                                  dev->name, DREG ));
        dev->interrupt = 0;
        return;
}


static int lance_rx( struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        int entry = lp->cur_rx & RX_RING_MOD_MASK;
        int i;

#ifdef NORMAL_MEM_ACCESS
        DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
                                  MEM->rx_head[entry].flag ));
#else
        DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name,
                                  GET_FLAG(&MEM->rx_head[entry]) ));
#endif

        /* If we own the next entry, it's a new packet. Send it up. */
#ifdef NORMAL_MEM_ACCESS
        while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) {
#else
        while( (GET_FLAG(&MEM->rx_head[entry]) & RMD1_OWN) == RMD1_OWN_HOST ) {
#endif
                struct lance_rx_head *head = &(MEM->rx_head[entry]);
#ifdef NORMAL_MEM_ACCESS
                int status = head->flag;
#else
                int status = GET_FLAG(head);
#endif

                if (status != (RMD1_ENP|RMD1_STP)) {            /* There was an error. */
                        /* There is a tricky error noted by John Murphy,
                           <murf@perftech.com> to Russ Nelson: Even with full-sized
                           buffers it's possible for a jabber packet to use two
                           buffers, with only the last correctly noting the error. */
                        if (status & RMD1_ENP)  /* Only count a general error at the */
                                lp->stats.rx_errors++; /* end of a packet.*/
                        if (status & RMD1_FRAM) lp->stats.rx_frame_errors++;
                        if (status & RMD1_OFLO) lp->stats.rx_over_errors++;
                        if (status & RMD1_CRC) lp->stats.rx_crc_errors++;
                        if (status & RMD1_BUFF) lp->stats.rx_fifo_errors++;
#ifdef NORMAL_MEM_ACCESS
                        head->flag &= (RMD1_ENP|RMD1_STP);
#else
                        SET_FLAG(head,GET_FLAG(head) & (RMD1_ENP|RMD1_STP));
#endif
                } else {
                        /* Malloc up new buffer, compatible with net-3. */
                        short pkt_len = head->msg_length & 0xfff;
                        struct sk_buff *skb;

                        if (pkt_len < 60) {
                                printk( "%s: Runt packet!\n", dev->name );
                                lp->stats.rx_errors++;
                        }
                        else {
                                skb = dev_alloc_skb( pkt_len+2 );
                                if (skb == NULL) {
                                        DPRINTK( 1, ( "%s: Memory squeeze, deferring packet.\n",
                                                                  dev->name ));
                          for( i = 0; i < RX_RING_SIZE; i++ )
#ifdef NORMAL_MEM_ACCESS
                        if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag &
#else
                                                if (GET_FLAG(&MEM->rx_head[(entry+i) & \
                                                                                                  RX_RING_MOD_MASK]) &
#endif
                                                        RMD1_OWN_CHIP)
                                                        break;

                                        if (i > RX_RING_SIZE - 2) {
                                                lp->stats.rx_dropped++;
#ifdef NORMAL_MEM_ACCESS
                        head->flag |= RMD1_OWN_CHIP;
#else
                        SET_FLAG(head,GET_FLAG(head) | RMD1_OWN_CHIP);
#endif
                                                lp->cur_rx++;
                                        }
                                        break;
                                }

                                if (lance_debug >= 3) {
                                        u_char *data = PKTBUF_ADDR(head), *p;
                                        printk( "%s: RX pkt type 0x%04x from ", dev->name,
                                                        ((u_short *)data)[6]);
                                        for( p = &data[6], i = 0; i < 6; i++ )
                                                printk("%02x%s", *p++, i != 5 ? ":" : "" );
                                        printk(" to ");
                                        for( p = data, i = 0; i < 6; i++ )
                                                printk("%02x%s", *p++, i != 5 ? ":" : "" );
                                        printk(" data %02x %02x %02x %02x %02x %02x %02x %02x "
                                                   "len %d\n",
                                                   data[15], data[16], data[17], data[18],
                                                   data[19], data[20], data[21], data[22],
                                                   pkt_len );
                                }

                                skb->dev = dev;
                                skb_reserve( skb, 2 );  /* 16 byte align */
                                skb_put( skb, pkt_len );        /* Make room */
                                lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len );
                                skb->protocol = eth_type_trans( skb, dev );
                                netif_rx( skb );
                                dev->last_rx = jiffies;
                                lp->stats.rx_packets++;
                                lp->stats.rx_bytes += pkt_len;
                        }
                }

#ifdef NORMAL_MEM_ACCESS
                head->flag |= RMD1_OWN_CHIP;
#else
                SET_FLAG(head,GET_FLAG(head) | RMD1_OWN_CHIP);
#endif
                entry = (++lp->cur_rx) & RX_RING_MOD_MASK;
        }
        lp->cur_rx &= RX_RING_MOD_MASK;

        /* From lance.c (Donald Becker): */
        /* We should check that at least two ring entries are free.      If not,
           we should free one and mark stats->rx_dropped++. */

        return 0;
}


static int lance_close( struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        struct lance_ioreg       *IO = lp->iobase;

        dev->start = 0;
        dev->tbusy = 1;

        AREG = CSR0;

        DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n",
                                  dev->name, DREG ));

        /* We stop the LANCE here -- it occasionally polls
           memory if we don't. */
        DREG = CSR0_STOP;

        return 0;
}


static struct net_device_stats *lance_get_stats( struct net_device *dev )

{       
        struct lance_private *lp = (struct lance_private *)dev->priv;
        return &lp->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 set_multicast_list( struct net_device *dev )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        struct lance_ioreg       *IO = lp->iobase;

        if (!dev->start)
                /* Only possible if board is already started */
                return;

        /* We take the simple way out and always enable promiscuous mode. */
        DREG = CSR0_STOP; /* Temporarily stop the lance. */

        if (dev->flags & IFF_PROMISC) {
                /* Log any net taps. */
                DPRINTK( 1, ( "%s: Promiscuous mode enabled.\n", dev->name ));
                REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */
        } else {
                short multicast_table[4];
                int num_addrs = dev->mc_count;
                int i;
                /* We don't use the multicast table, but rely on upper-layer
                 * filtering. */
                memset( multicast_table, (num_addrs == 0) ? 0 : -1,
                                sizeof(multicast_table) );
                for( i = 0; i < 4; i++ )
                        REGA( CSR8+i ) = multicast_table[i];
                REGA( CSR15 ) = 0; /* Unset promiscuous mode */
        }

        /*
         * Always set BSWP after a STOP as STOP puts it back into
         * little endian mode.
         */
        REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0);

        /* Resume normal operation and reset AREG to CSR0 */
        REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT;
}


/* This is needed for old RieblCards and possible for new RieblCards */

static int lance_set_mac_address( struct net_device *dev, void *addr )

{       struct lance_private *lp = (struct lance_private *)dev->priv;
        struct sockaddr *saddr = addr;
        int i;

        if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL)
                return( -EOPNOTSUPP );

        if (dev->start) {
                /* Only possible while card isn't started */
                DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n",
                                          dev->name ));
                return( -EIO );
        }

        slow_memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len );

        {
                        unsigned char hwaddr[6];
                        for( i = 0; i < 6; i++ ) 
                                        hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */
                        slow_memcpy(MEM->init.hwaddr, hwaddr, sizeof(hwaddr));
        }

        lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 );
        /* set also the magic for future sessions */
#ifdef NORMAL_MEM_ACCESS
        *RIEBL_MAGIC_ADDR = RIEBL_MAGIC;
#else
        {
                        unsigned long magic = RIEBL_MAGIC;
                        slow_memcpy(RIEBL_MAGIC_ADDR, &magic, sizeof(*RIEBL_MAGIC_ADDR));
        }
#endif
        return( 0 );
}


#ifdef MODULE
static struct net_device bagetlance_dev;

int init_module(void)

{       int err;

        bagetlance_dev.init = bagetlance_probe;
        if ((err = register_netdev( &bagetlance_dev ))) {
                if (err == -EIO)  {
                        printk( "No Vme Lance board found. Module not loaded.\n");
                }
                return( err );
        }
        return( 0 );
}

void cleanup_module(void)

{
        unregister_netdev( &bagetlance_dev );
}

#endif /* MODULE */

/*
 * Local variables:
 *  c-indent-level: 4
 *  tab-width: 4
 * End:
 */