if_ene.c

IXP425的BSP代码

#ifdef OLDSTUFF
    while ((sysInByte (ENE_INTSTAT (pSoftc->eneAddr)) & ISTAT_RST) != ISTAT_RST)
        ;
#endif /* OLDSTUFF */

    /* 2. initialize Data Configuration Register:
     *    16-bit bus, burst mode, 8-deep FIFO.
     */

    sysOutByte (ENE_DCON (pSoftc->eneAddr), DCON_BSIZE1 | DCON_BUS16 | 0x08);

    eneGetAddr (unit);                  /* get ethernet address */

    /* 3. clear Remote Byte Count Register */

    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), 0x00);
    sysOutByte (ENE_RBCR1 (pSoftc->eneAddr), 0x00);

    /* 4. initialize Receive Configuration Register */

    sysOutByte (ENE_RCON (pSoftc->eneAddr), pSoftc->rxFilter);

    /* 5. place the ENE in LOOPBACK mode 1 or 2 */

    sysOutByte (ENE_TCON (pSoftc->eneAddr), TCON_LB1);

    /* 6. initialize Receive Buffer Ring */

    sysOutByte (ENE_RSTART (pSoftc->eneAddr), NE2000_PSTART);
    sysOutByte (ENE_RSTOP (pSoftc->eneAddr), (char)NE2000_PSTOP);
    sysOutByte (ENE_BOUND (pSoftc->eneAddr), (char)NE2000_PSTART);

    /* 7. clear Interrupt Status Register */

    sysOutByte (ENE_INTSTAT (pSoftc->eneAddr), (char)0xff);

    /* 8. initialize Interrupt Mask Register */

    sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 0x00);

    /* 9. program Command Register for page 1 */

    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_PAGE1 | CMD_STOP);

    /* i) initialize physical address registers */

    sysOutByte (ENE_STA0 (pSoftc->eneAddr), *pAddr++);
    sysOutByte (ENE_STA1 (pSoftc->eneAddr), *pAddr++);
    sysOutByte (ENE_STA2 (pSoftc->eneAddr), *pAddr++);
    sysOutByte (ENE_STA3 (pSoftc->eneAddr), *pAddr++);
    sysOutByte (ENE_STA4 (pSoftc->eneAddr), *pAddr++);
    sysOutByte (ENE_STA5 (pSoftc->eneAddr), *pAddr);

    /* ii) initialize multicast address registers */

    sysOutByte (ENE_MAR0 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR1 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR2 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR3 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR4 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR5 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR6 (pSoftc->eneAddr), 0);
    sysOutByte (ENE_MAR7 (pSoftc->eneAddr), 0);

    /* iii) initialize current page pointer */

    sysOutByte (ENE_CURR (pSoftc->eneAddr), NE2000_PSTART + 1);
    pSoftc->nextPacket = NE2000_PSTART + 1;

    /* set memory parameters */

    sysOutByte (ENE_CMD (pSoftc->eneAddr), 
			 (char)(CMD_NODMA | CMD_PAGE2 | CMD_STOP));
    sysOutByte (ENE_ENH (pSoftc->eneAddr), 0x00);       /* 0 wait states */
    sysOutByte (ENE_BLOCK (pSoftc->eneAddr), 0x00);     /* 0x00xxxx */

    /* 10. put the ENE in START mode */

    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_PAGE0 | CMD_START);

    /* 11. initialize Transmit Configuration Register */

    sysOutByte (ENE_TCON (pSoftc->eneAddr), 0x00);

    }

/*******************************************************************************
*
* eneGetAddr - get hardwired ethernet address.
*
* Read the ethernet address from the board's byte-wide configuration memory,
* one byte at a time.  If we could read it in word-wide cycles, we could use
* eneDataIn(), below.  The on-board logic requires double the byte count!
*
*/

static void eneGetAddr 
    (
    int unit 
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];
    UCHAR * pAddr               = (UCHAR *)pSoftc->es_enaddr;

    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_PAGE0 | CMD_START);
    sysOutByte (ENE_RSAR0 (pSoftc->eneAddr), NE2000_EADDR_LOC);
    sysOutByte (ENE_RSAR1 (pSoftc->eneAddr), NE2000_CONFIG_PAGE);
    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), (EA_SIZE * 2) & 0xff);
    sysOutByte (ENE_RBCR1 (pSoftc->eneAddr), (EA_SIZE * 2) >> 8);
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_RREAD | CMD_START);

    *pAddr++ = sysInByte (ENE_DATA (pSoftc->eneAddr));
    *pAddr++ = sysInByte (ENE_DATA (pSoftc->eneAddr));
    *pAddr++ = sysInByte (ENE_DATA (pSoftc->eneAddr));
    *pAddr++ = sysInByte (ENE_DATA (pSoftc->eneAddr));
    *pAddr++ = sysInByte (ENE_DATA (pSoftc->eneAddr));
    *pAddr   = sysInByte (ENE_DATA (pSoftc->eneAddr));
    }

/*******************************************************************************
*
* eneDataOut - output bytes to NE2000 memory
*
* NOMANUAL
*/

static void eneDataOut
    (
    int         unit,
    char *      pData,
    UINT16      len,
    UINT16      eneAddress
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];

    if (len == 0)
        return;                         /* nothing to do */

#ifndef BSD43_DRIVER
    /* Bump the statistic counter. */

    pSoftc->es_if.if_opackets++;
#endif

    sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 0);      /* disable board ints.*/
    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), (char)0xff);
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_PAGE0 | CMD_START);
    sysOutByte (ENE_RSAR0 (pSoftc->eneAddr), eneAddress & 0xff);
    sysOutByte (ENE_RSAR1 (pSoftc->eneAddr), eneAddress >> 8);
    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), len & 0xff);
    sysOutByte (ENE_RBCR1 (pSoftc->eneAddr), len >> 8);
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_RWRITE | CMD_START);

    sysOutWordString (ENE_DATA (pSoftc->eneAddr), (short *)pData, (len / 2));
    if (len & 1)
        sysOutByte (ENE_DATA (pSoftc->eneAddr), *(pData + (len - 1)));
    eneIntEnable (unit);
    }

/*******************************************************************************
*
* eneDataIn - input bytes from NE2000 memory
*
* NOMANUAL
*/

static void eneDataIn
    (
    int         unit,
    UINT16      eneAddress,
    UINT16      len,
    char *      pData
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];

    sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 0);
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_PAGE0 | CMD_START);
    sysOutByte (ENE_RSAR0 (pSoftc->eneAddr), eneAddress & 0xff);
    sysOutByte (ENE_RSAR1 (pSoftc->eneAddr), eneAddress >> 8);
    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), len & 0xff);
    sysOutByte (ENE_RBCR1 (pSoftc->eneAddr), len >> 8);
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_RREAD | CMD_START);

    sysInWordString (ENE_DATA (pSoftc->eneAddr), (short *)pData, (len / 2));
    if (len & 1)
         *(pData + (len - 1)) = sysInByte (ENE_DATA (pSoftc->eneAddr));
    eneIntEnable (unit);
    }

/*******************************************************************************
*
* eneGetCurr - get current page
*
* RETURNS: current page that ENE is working on
*
* NOMANUAL
*/

static UCHAR eneGetCurr 
    (
    int unit
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];
    UCHAR curr;

    /* get CURR register */

    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_PAGE1);
    curr = sysInByte (ENE_CURR (pSoftc->eneAddr));
    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_PAGE0);

    return (curr);
    }

/*******************************************************************************
*
* eneIntEnable - enable NE2000 interrupt conditions
*/

static void eneIntEnable
    (
    int unit
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];

    sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 
                IM_OVWE | IM_TXEE | IM_RXEE | IM_PTXE | IM_PRXE);
    }

/*******************************************************************************
*
* eneOverwriteRecover - recover from receive buffer ring overflow
*
* This procedure is mandated by National Semiconductor as the only safe
* way to recover from an Overwrite Warning Error.  The first two steps
* of their procedure, reading the Command Register and stopping the NIC,
* were accomplished in the interrupt handler.  The rest occurs here.
*
* This routine is scheduled to run in the net task since it must delay
* to allow the STOP command to take effect.
*/

static void eneOverwriteRecover
    (
    int unit,
    UCHAR cmdStatus
    )
    {
    FAST ENE_SOFTC * pSoftc          = pEneSoftc [unit];
    BOOL        reSend;

    /* 1. read the TXP bit in the command register (already in cmdStatus) */

    /* 2. issue the STOP command (done in the interrupt handler) */

    /* 3. delay at least 1.6 milliseconds (1/625 second) */

    taskDelay ((sysClkRateGet () / 625) + 1);

    /* we are now supposedly sure the NIC is stopped */

    /* 4. clear Remote Byte Count Register */

    sysOutByte (ENE_RBCR0 (pSoftc->eneAddr), 0x00);
    sysOutByte (ENE_RBCR1 (pSoftc->eneAddr), 0x00);

    /* 5. read the stored value of the TXP bit (in cmdStatus) */

    if ( (cmdStatus & CMD_TXP) == 0)
        reSend = FALSE;
    else
        {
        if ((sysInByte (ENE_INTSTAT (pSoftc->eneAddr)) &
              (ISTAT_PTX | ISTAT_TXE)) == 0)

            /* transmit was in progress but probably deferring */

            reSend = TRUE;
        else

            /* transmit was completed (probably), don't repeat it */

            reSend = FALSE;
        }

    /* 6. place the NIC in loopback mode */

    sysOutByte (ENE_TCON (pSoftc->eneAddr), TCON_LB1);

    /* 7. issue the START command to the NIC */

    sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_PAGE0 | CMD_START);

    /* 8. remove one or more packets from the receive buffer ring */

    pSoftc->current = eneGetCurr (unit);
    eneGet (unit);                      /* get all the packets there are */

    /* 9. reset the overwrite warning bit in the ISR */

    /* reset all active interrupt conditions */

    sysOutByte (ENE_INTSTAT (pSoftc->eneAddr),
                sysInByte (ENE_INTSTAT (pSoftc->eneAddr)));

    /* 10. take the NIC out of loopback */

    sysOutByte (ENE_TCON (pSoftc->eneAddr), 0x00);

    /* 11. if need to resend, do so, otherwise if anything queued, send that */

    if (reSend)
        sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_TXP);
    else if (pSoftc->es_if.if_snd.ifq_head != NULL)
#ifdef BSD43_DRIVER
        enePut (unit);
#else
        enePut (pSoftc);
#endif
    }

/*******************************************************************************
*
* eneShow - display statistics for the NE2000 `ene' network interface
*
* This routine displays statistics about the `ene' Ethernet network interface.
* It has two parameters:
* .iP <unit>
* interface unit; should be 0.
* .iP <zap>
* if 1, all collected statistics are cleared to zero.
* .LP
*
* RETURNS: N/A
*/

void eneShow 
    (
    int unit,   /* interface unit */
    BOOL zap    /* 1 = zero totals */
    )
    {
    FAST ENE_SOFTC * pSoftc;
    FAST int ix;
    static char * e_message [] = {
        "collisions",
        "crcs",
        "aligns",
        "missed",
        "over-runs",
        "disabled",
        "deferring",
        "under-run",
        "aborts",
        "out-of-window coll",
        "heart-beats",
        "bad-packet",
        "short-packet",
        "t-no-error",
        "r-no-error",
        "t-error",
        "r-error",
        "over-write",
        "wrapped",
        "interrupts",
        "reset",
        "stray-int",
        "jabbers"};

    if ((UINT)unit >= NENE)
        {
        printf ("eneShow: invalid unit number %d; valid range 0..%d\n",
                unit, NENE);
        return;
        }

    pSoftc = pEneSoftc [unit];
    if ((pSoftc == NULL) || ! pSoftc->attached)
        {
        printf ("eneShow: unit %d not attached\n", unit);
        return;
        }

    for (ix = 0; ix < NELEMENTS(e_message); ix++)
        {
        printf ("    %-30.30s  %4d\n", e_message [ix], pSoftc->eneStat.stat [ix]);
        if (zap)
            pSoftc->eneStat.stat [ix] = 0;
        }
    printf ("    %-30.30s  0x%02x\n", "flags", pSoftc->flags);
    }

/*******************************************************************************
*
* enedetach - detach the card from the bus.
*
* Dettach the card from the bus for reset.
*
* RETURNS: N/A
*
* NOMANUAL
*/

void enedetach 
    (
    int unit
    )
    {
    FAST ENE_SOFTC * pSoftc     = pEneSoftc [unit];

    if (pSoftc->attached)
        {
        sysOutByte (ENE_INTMASK (pSoftc->eneAddr), 0x00);
        sysOutByte (ENE_CMD (pSoftc->eneAddr), CMD_NODMA | CMD_STOP);
        while ((sysInByte (ENE_INTSTAT (pSoftc->eneAddr)) & ISTAT_RST) != ISTAT_RST)
            ;
        sysOutByte (ENE_RCON (pSoftc->eneAddr), 0x00);
        sysOutByte (ENE_TCON (pSoftc->eneAddr), TCON_LB1);
        sysIntDisablePIC (pSoftc->intLevel);
        eneBoardReset (unit);
        }
    pSoftc->attached = FALSE;           /* allow a new attach */
    }