motcpmend.c

操作系统vxworks平台下end设备的驱动程序,支持多种芯片,支持多种cpu

*
* Using data in the control structure, setup and initialize the memory
* areas needed.  If the memory address is not already specified, then allocate
* cache safe memory.
*
* RETURNS: OK or ERROR.
*
*/

LOCAL STATUS motCpmInitMem
    (
    END_CTRL *	pDrvCtrl	/* pointer to END_CTRL structure */
    )
    {
    int		counter;
    FUNCPTR 	allocFunc;
    void *	pData;
    char*	pTmpBuf;
    int		numBuf;

    /* Set up the structures to allow us to free data after sending it. */

    for (counter = 0; counter < pDrvCtrl->ether.txBdNum; counter++)
	{
	pDrvCtrl->freeRtn[counter] = NULL;
	pDrvCtrl->freeData[counter].arg1 = NULL;
	pDrvCtrl->freeData[counter].arg2 = NULL;
	}

    if (pDrvCtrl->bufBase == NONE)
	{
	/* We must allocate memory for buffer descriptors */

	pData = NULL;
	allocFunc = (FUNCPTR) cacheDmaMalloc;
	}
    else
	{
	/* Memory for buffer descriptors is already allocated */

	pData = (void *) pDrvCtrl->bufBase;
	allocFunc = NULL;
	}

    /* 
     * calculate the number of buffers we need :
     * receive buffers + transmit buffers + loaner buffers (= L_POOL)
     */

    numBuf = pDrvCtrl->ether.rxBdNum + pDrvCtrl->ether.txBdNum + L_POOL;

    /* Use the MUX's memory manager to get our buffers. */

    pDrvCtrl->endObject.pNetPool = &motCpmNetPool;

    motClDescTbl[0].clNum 	= numBuf;
    motClDescTbl[0].memSize 	= (numBuf * (FRAME_MAX_AL + sizeof (long)));

    motMclBlkConfig.mBlkNum 	= 5 * numBuf;
    motMclBlkConfig.clBlkNum 	= 5 * numBuf;
    motMclBlkConfig.memSize 	= ((motMclBlkConfig.mBlkNum *
                                    (MSIZE + sizeof (long))) +
                                   (motMclBlkConfig.clBlkNum *
                                    (CL_BLK_SZ + sizeof (long))));

    if ((motMclBlkConfig.memArea = (char *) memalign (sizeof (long),
                                                      motMclBlkConfig.memSize))
        == NULL)
        return (ERROR);

    motClDescTbl[0].memArea = (char *) cacheDmaMalloc(motClDescTbl[0].memSize);
    if (motClDescTbl[0].memArea == NULL)
        {
        MOTCPMLOGMSG (( "system memory unavailable\n", 1, 2, 3, 4, 5, 6));
        return (ERROR);
        }

    if (netPoolInit(pDrvCtrl->endObject.pNetPool, &motMclBlkConfig,
                    &motClDescTbl[0], motClDescTblNumEnt, NULL) == ERROR)
                    
        {
        MOTCPMLOGMSG(("Could not init buffering\n", 1, 2, 3, 4, 5, 6));
        return (ERROR);
        }
    /* Store the cluster pool id as others need it later. */
    pDrvCtrl->pClPoolId = clPoolIdGet(pDrvCtrl->endObject.pNetPool,
                                      FRAME_MAX_AL, FALSE);
    for (counter = 0; counter < pDrvCtrl->ether.rxBdNum; counter++)
	{
        if ((pTmpBuf = (char *)netClusterGet(pDrvCtrl->endObject.pNetPool,
                                             pDrvCtrl->pClPoolId)) == NULL)
            {
            return (ERROR);
            }

        pDrvCtrl->ether.rxBdBase[counter].dataPointer = (u_char *) pTmpBuf;
	}
   
    pDrvCtrl->txPoolBuf = netClusterGet (pDrvCtrl->endObject.pNetPool, 
                                         pDrvCtrl->pClPoolId);

 
    return (OK);
    }

/*******************************************************************************
*
* motCpmEndStart - start the device 
*
* This function initializes the device and calls BSP functions to connect
* interrupts and start the device running in interrupt mode.
*
* The complement of this routine is motCpmEndStop().  Once a unit is reset by
* motCpmEndStop(), it may be re-initialized to a running state by this routine.
* 
* RETURNS: OK if successful, otherwise ERROR.
*/

LOCAL STATUS motCpmEndStart
    (
    END_CTRL *	pDrvCtrl	/* pointer to END_CTRL structure */
    )
    {
    int			counter;
    u_char *		enetAddr;
    ETHER_MULTI *	pCurr;

    MOTCPMLOGMSG(("motCpmEndStart \n", 0, 0, 0, 0, 0, 0));

    /* initialize flag(s) */

    pDrvCtrl->polling = FALSE;
    pDrvCtrl->txStop = FALSE;
    pDrvCtrl->txCleaning = FALSE;
    pDrvCtrl->txBlocked = FALSE;

    /* set up transmit buffer descriptors */

    pDrvCtrl->ether.pScc->param.tbase = (UINT16)
	((UINT32) pDrvCtrl->ether.txBdBase & 0xffff);
    pDrvCtrl->ether.pScc->param.tbptr = (UINT16)
	((UINT32) pDrvCtrl->ether.txBdBase & 0xffff);

    pDrvCtrl->ether.txBdNext  = 0;

    /* initialize each transmit buffer descriptor */
     
    for (counter = 0; counter < pDrvCtrl->ether.txBdNum; counter++)
        pDrvCtrl->ether.txBdBase[counter].statusMode = SCC_ETHER_TX_BD_I |
                                                       SCC_ETHER_TX_BD_PAD |
                                                       SCC_ETHER_TX_BD_L |
                                                       SCC_ETHER_TX_BD_TC;

    /* set the last BD to wrap to the first */

    pDrvCtrl->ether.txBdBase[(counter - 1)].statusMode |= SCC_ETHER_TX_BD_W;

    /* set up receive buffer descriptors */

    pDrvCtrl->ether.pScc->param.rbase = (UINT16)
	((UINT32) pDrvCtrl->ether.rxBdBase & 0xffff);
    pDrvCtrl->ether.pScc->param.rbptr = (UINT16)
	((UINT32) pDrvCtrl->ether.rxBdBase & 0xffff);

    pDrvCtrl->ether.rxBdNext  = 0;

    /* initialize each receive buffer descriptor */

    for (counter = 0; counter < pDrvCtrl->ether.rxBdNum; counter++)
        pDrvCtrl->ether.rxBdBase[counter].statusMode = SCC_ETHER_RX_BD_I |
        					       SCC_ETHER_RX_BD_E;

    /* set the last BD to wrap to the first */

    pDrvCtrl->ether.rxBdBase[(counter - 1)].statusMode |= SCC_ETHER_RX_BD_W;

    /* set SCC attributes to Ethernet mode */
 
    pDrvCtrl->ether.pSccReg->gsmrl    = SCC_GSMRL_ETHERNET | SCC_GSMRL_TPP_10 |
                                        SCC_GSMRL_TPL_48   | SCC_GSMRL_TCI;
    pDrvCtrl->ether.pSccReg->gsmrh    = 0x0;

    pDrvCtrl->ether.pSccReg->psmr     = SCC_ETHER_PSMR_CRC |
					SCC_ETHER_PSMR_NIB_22;

    if (END_FLAGS_GET(&pDrvCtrl->endObject) & IFF_PROMISC)
        pDrvCtrl->ether.pSccReg->psmr |= SCC_ETHER_PSMR_PRO;
 
    pDrvCtrl->ether.pSccReg->dsr      = 0xd555;
    pDrvCtrl->ether.pScc->param.rfcr  = 0x18;      /* supervisor data access */
    pDrvCtrl->ether.pScc->param.tfcr  = 0x18;      /* supervisor data access */
    pDrvCtrl->ether.pScc->param.mrblr = FRAME_MAX_AL;  /* max rx buffer size */

    /* initialize parameter the SCC RAM */
 
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->c_pres	= 0xffffffff;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->c_mask	= 0xdebb20e3;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->crcec	= 0x00000000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->alec	= 0x00000000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->disfc	= 0x00000000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->pads	= 0x8888;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->ret_lim	= 0x000f;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->mflr	= FRAME_MAX;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->minflr	= FRAME_MIN;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->maxd1	= FRAME_MAX_AL;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->maxd2	= FRAME_MAX_AL;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->gaddr1	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->gaddr2	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->gaddr3	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->gaddr4	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->p_per	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->iaddr1	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->iaddr2	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->iaddr3	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->iaddr4	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->taddr_h	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->taddr_m	= 0x0000;
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->taddr_l	= 0x0000;

    /* set the hardware Ethernet address of the board */

    enetAddr = END_HADDR(&pDrvCtrl->endObject);

    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->paddr1_h =
        (enetAddr[5] << 8) + enetAddr[4];
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->paddr1_m =
        (enetAddr[3] << 8) + enetAddr[2];
    ((SCC_ETHER_PROTO *)pDrvCtrl->ether.pScc->prot)->paddr1_l =
        (enetAddr[1] << 8) + enetAddr[0];

    /* Set the multicast addresses */

    for (pCurr = END_MULTI_LST_FIRST(&pDrvCtrl->endObject); pCurr != NULL;
			pCurr = (ETHER_MULTI *)lstNext(&pCurr->node))
	{
	/* add multicast address */

	motCpmMCastFilterSet (pDrvCtrl, pCurr->addr);
	}

    /* enable Ethernet interrupts */

    pDrvCtrl->ether.pSccReg->scce = 0xffff;		/* clr events */

    /* allow receive and transmit errors interrupts */

    pDrvCtrl->ether.pSccReg->sccm = SCC_ETHER_SCCX_RXF | SCC_ETHER_SCCX_TXE |
				    SCC_ETHER_SCCX_TXB;

    *CPM_CIMR(pDrvCtrl->regBase) |= pDrvCtrl->ether.intMask;

    /* call the BSP to do any other initialization (e.g., connecting clocks) */

    SYS_ENET_ENABLE;

    /* raise the interface flags - mark the device as up */

    END_FLAGS_SET (&pDrvCtrl->endObject, IFF_UP | IFF_RUNNING);

    /* enable the transmitter */

    pDrvCtrl->ether.pSccReg->gsmrl |= SCC_GSMRL_ENT;

    /* issue the restart transmitter command to the CP */

    while (*CPM_CPCR(pDrvCtrl->regBase) & CPM_CR_FLG);
    *CPM_CPCR(pDrvCtrl->regBase) = ((pDrvCtrl->ether.sccNum - 1) << 6) |
                                      CPM_CR_SCC_RESTART | CPM_CR_FLG;
    while (*CPM_CPCR(pDrvCtrl->regBase) & CPM_CR_FLG);

    /* enable the receiver */

    pDrvCtrl->ether.pSccReg->gsmrl |= SCC_GSMRL_ENR;

    return (OK);
    }

/*******************************************************************************
*
* motCpmEndStop - stop the device 
*
* This routine marks the interface as down and resets the device.  This
* includes disabling interrupts, stopping the transmitter and receiver,
* and calling the bsp-specific LAN disable routine to do any target 
* specific disabling.
*
* The complement of this routine is motCpmEndStart().  Once a unit is 
* stop in this routine, it may be re-initialized to a running state by 
* motCpmEndStart().
*
* RETURNS: OK or ERROR.
*/

LOCAL STATUS motCpmEndStop
    (
    END_CTRL *	pDrvCtrl	/* pointer to END_CTRL structure */
    )
    {
    /* mark the driver as down */

    END_FLAGS_CLR (&pDrvCtrl->endObject, IFF_UP | IFF_RUNNING);

    /* Reset the device */

    motCpmReset (pDrvCtrl);

    return (OK);
    }

/******************************************************************************
*
* motCpmEndUnload - unload a driver from the system
*
* This function first brings down the device, and then frees any
* stuff that was allocated by the driver in the load function.
*
* RETURN : OK or ERROR
*/

LOCAL STATUS motCpmEndUnload
    (
    END_CTRL	*pDrvCtrl	/* pointer to END_CTRL structure */
    )
    {
    END_OBJECT_UNLOAD (&pDrvCtrl->endObject);

    return (OK);
    }

/*******************************************************************************
*
* motCpmEndSend - output packet to network interface device
*
* This routine() takes a M_BLK_ID and sends off the data in the M_BLK_ID.
* The buffer must already have the addressing information properly installed
* in it. This is done by a higher layer. The last arguments are a free
* routine to be called when the device is done with the buffer and a pointer
* to the argument to pass to the free routine.
*
* muxSend() calls this routine each time it wants to send a packet.
* Errors are detected at interrupt level.
*
* RETURNS: OK or ERROR.
*/

LOCAL STATUS motCpmEndSend
    (
    END_CTRL	*pDrvCtrl,	/* pointer to END_CTRL structure */
    M_BLK_ID    pMblk	/* Data to send */
    )
    {
    int			length;
    SCC_BUF *		pTxBd;
    u_char *		pad;
    char *	        pBuf;
    int 		oldLevel;
    int                 s;
    
    MOTCPMLOGMSG(("motCpmEndSend \n", 0, 0, 0, 0, 0, 0));

    if (pDrvCtrl->txBlocked)
        return (END_ERR_BLOCK);
    
    if (pDrvCtrl->polling)
	{ 
        netMblkClChainFree (pMblk); /* free the given mBlk chain */
        errno = EINVAL;
        return (ERROR);
        }

    /* gain exclusive access to the transmitter */

    END_TX_SEM_TAKE (&pDrvCtrl->endObject, WAIT_FOREVER);

    /* get a free transmit frame descriptor */
    
    pTxBd = & pDrvCtrl->ether.txBdBase[pDrvCtrl->ether.txBdNext];
    
    /* check if a transmit buffer descriptor is available */
    
    if ((pTxBd->statusMode & SCC_ETHER_TX_BD_R) || 
        (((pDrvCtrl->ether.txBdNext + 1) % pDrvCtrl->ether.txBdNum) 
         == pDrvCtrl->txBdIndexC))
        {
        END_TX_SEM_GIVE (&pDrvCtrl->endObject);
        s = intLock();
        pDrvCtrl->txBlocked = TRUE;
        intUnlock(s);
        return (END_ERR_BLOCK);
        }
    
    /* fill the transmit frame descriptor */
    
    pBuf = netClusterGet(pDrvCtrl->endObject.pNetPool, pDrvCtrl->pClPoolId);

    if (pBuf == NULL)
        {
        END_TX_SEM_GIVE (&pDrvCtrl->endObject);
	netMblkClChainFree(pMblk);
        return (ERROR);
        }

    length = netMblkToBufCopy (pMblk, (char *)pBuf, NULL);
    netMblkClChainFree(pMblk); 

    pTxBd->dataPointer = (u_char *) pBuf;
    
    /* padding mechanism in Rev A is buggy - do in software */
    
    if (length < FRAME_MIN)
        {
        pad = pTxBd->dataPointer + length;
        for (; length != FRAME_MIN; length++, pad++)
            *pad = 0x88;
        }