atadrv.c

IXP425的BSP代码

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY) && 
		   (pCtrl->wdgOkay))
	        ;

            while (((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_READY) == 0)
                   && (pCtrl->wdgOkay))
	        ;

	    wdCancel (pCtrl->wdgId);

            if (!pCtrl->wdgOkay)
	        {
	        pCtrl->wdgOkay = TRUE;
	        (void) ataInit (ctrl, 0);
	        }

	    break;

	case ATA_STAT_BUSY:

            while (ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY)
		;

	    break;

	case ATA_STAT_DRQ:

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_DRQ) == 0)
	        ;

	    break;

	case ATA_STAT_SEEKCMPLT:

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_SEEKCMPLT) == 0)
	        ;

	    break;
	}

    ATA_DEBUG_MSG (3, "ataWait end:\n", 0, 0, 0, 0, 0, 0);
    }

/*******************************************************************************
*
* ataPiWait - wait the ATAPI drive ready
*
* Wait the drive ready
*
* RETURNS: OK, ERROR if the drive didn't become ready in certain period of time.
*/

LOCAL STATUS ataPiWait
    (
    int 	ctrl,
    int 	request,
    BOOL	reset
    )
    {
    ATA_CTRL    *pCtrl	= &ataCtrl[ctrl]; 
    ATA_DRIVE   *pDrive;
    int		drive;

    ATA_DEBUG_MSG (3, "ataPiWait: ctrl=%d  request=0x%x\n", ctrl, request,
                   0, 0, 0, 0);

    drive = (ATA_IO_BYTE_READ (pCtrl->sdh) >> 4) & 1;

    pDrive = &pCtrl->drive[drive];

    switch (request)
	{
	case ATA_STAT_READY:
	    wdStart (pCtrl->wdgId, (sysClkRateGet() * pCtrl->wdgTimeout), 
		     (FUNCPTR)ataWdog, ctrl);

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY) && 
		   (pCtrl->wdgOkay))
	        ;

            while (((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_READY) == 0)
                   && (pCtrl->wdgOkay))
	        ;

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_DRQ) &&
		   (pCtrl->wdgOkay))
                ;

	    wdCancel (pCtrl->wdgId);

            if (!pCtrl->wdgOkay)
	        {
	        pCtrl->wdgOkay = TRUE;

                if (reset == TRUE)
	            (void) pDrive->Reset (ctrl, drive);

                return (ERROR);
	        }

	    break;

	case ATA_STAT_ACCESS:
	    wdStart (pCtrl->wdgId, (sysClkRateGet() * pCtrl->wdgTimeout), 
		     (FUNCPTR)ataWdog, ctrl);

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY) && 
		   (pCtrl->wdgOkay))
	        ;

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_DRQ) &&
		   (pCtrl->wdgOkay))
                ;

	    wdCancel (pCtrl->wdgId);

            if (!pCtrl->wdgOkay)
	        {
	        pCtrl->wdgOkay = TRUE;

                if (reset == TRUE)
	            (void) pDrive->Reset (ctrl, drive);

                return (ERROR);
	        }

	    break;

	case ATA_STAT_BUSY:

            while (ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY)
		;

	    break;

	case ATA_STAT_DRQ:

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_DRQ) == 0)
	        ;

	    break;

	case ATA_STAT_SEEKCMPLT:

            while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_SEEKCMPLT) 
                   == 0)
	        ;

	    break;
	}

    ATA_DEBUG_MSG (3, "ataPiWait end:\n", 0, 0, 0, 0, 0, 0);

    return (OK);
    } /* ataPiWait */


/*******************************************************************************
*
* ataInit - init a ATA/IDE disk controller
*
* This routine initializes a ATA/IDE disk controller.
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS ataInit
    (
    int ctrl,
    int dev
    )
    {
    ATA_CTRL *pCtrl	= &ataCtrl[ctrl];
    int      ix;

    ATA_DEBUG_MSG (2, "ataInit: ctrl=%d\n", ctrl, 0, 0, 0, 0, 0);

    ATA_IO_BYTE_WRITE (pCtrl->dControl,
                       ATA_CTL_4BIT | ATA_CTL_RST);

    for (ix = 0; ix < 100; ix++)
        sysDelay ();

    ATA_IO_BYTE_WRITE (pCtrl->dControl, ATA_CTL_4BIT);

    for (ix = 0; ix < 100; ix++)
        sysDelay ();

    pCtrl->wdgOkay = TRUE;

    /* start the ata  watchdog */

    wdStart (pCtrl->wdgId, (sysClkRateGet() * pCtrl->wdgTimeout),
	     (FUNCPTR)ataWdog, ctrl);

    while ((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_BUSY) &&
           (pCtrl->wdgOkay))
	;

    ATA_IO_BYTE_WRITE (pCtrl->dControl, ATA_CTL_4BIT);

    for (ix = 0; ix < 100; ix++) 
        sysDelay ();

    while (((ATA_IO_BYTE_READ (pCtrl->aStatus) & ATA_STAT_READY) == 0) &&
	   (pCtrl->wdgOkay))
	;

    wdCancel (pCtrl->wdgId);

    if (!pCtrl->wdgOkay)
        {
	ATA_DEBUG_MSG (1, "ataInit error:\n", 0, 0, 0, 0, 0, 0);

        pCtrl->wdgOkay = TRUE;

        return (ERROR);
        }

    ATA_DEBUG_MSG (3, "ataInit Calling sysAtaInit (if present):\n",
                   0, 0, 0, 0, 0, 0);

    /* Call out to bsp specific setup routine */

    SYS_ATA_INIT_RTN (ctrl);
    ATA_DEBUG_MSG (3, "ataInit sysAtaInit returned\n", 0, 0, 0, 0, 0, 0);

    /*
     * The following allows recovery after an interrupt
     * caused by drive software reset
     */

    semBInit(&pCtrl->syncSem, SEM_Q_FIFO, SEM_EMPTY);

    ATA_DEBUG_MSG (2, "ataInit end\n", 0, 0, 0, 0, 0, 0);

    return (OK);
    }

/*******************************************************************************
*
* ataCmd - issue non data command
*
* Issue a non data command.  Non data commands have the same protocol.
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS ataCmd
    (
    int ctrl,
    int drive,
    int cmd,
    int arg0,
    int arg1
    )
    {
    ATA_CTRL *pCtrl	= &ataCtrl[ctrl];
    ATA_TYPE *pType	= &ataTypes[ctrl][drive];
    BOOL     retry	= TRUE;
    int      retryCount	= 0;
    int      semStatus;

    ATA_DEBUG_MSG (2, "ataCmd%d/%d: cmd=0x%x\n", ctrl, drive, cmd, arg0, arg1, 0);

    while (retry)
	{
        ataWait (ctrl, ATA_STAT_READY);

	switch (cmd)
	    {
	    case ATA_CMD_DIAGNOSE:
        	ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4));
		break;

	    case ATA_CMD_INITP:
		ATA_IO_BYTE_WRITE (pCtrl->cylLo, pType->cylinders);
		ATA_IO_BYTE_WRITE (pCtrl->cylHi, pType->cylinders >> 8);
		ATA_IO_BYTE_WRITE (pCtrl->seccnt, pType->sectors);
		ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4) | 
			    ((pType->heads - 1) & 0x0f));
		break;

	    case ATA_CMD_RECALIB:
		ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4));
		break;

	    case ATA_CMD_SEEK:
		ATA_IO_BYTE_WRITE (pCtrl->cylLo, arg0);
		ATA_IO_BYTE_WRITE (pCtrl->cylHi, arg0>>8);
		ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4) |
			    (arg1 & 0xf));
		break;

	    case ATA_CMD_SET_FEATURE:
        	ATA_IO_BYTE_WRITE (pCtrl->seccnt, arg1);
        	ATA_IO_BYTE_WRITE (pCtrl->feature, arg0);
        	ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4));
		break;

	    case ATA_CMD_SET_MULTI:
        	ATA_IO_BYTE_WRITE (pCtrl->seccnt, arg0);
        	ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4));
		break;

	    }

        ATA_IO_BYTE_WRITE (pCtrl->command, cmd);
        semStatus = semTake (&pCtrl->syncSem, 
			     sysClkRateGet() * pCtrl->semTimeout);

        if ((pCtrl->intStatus & ATA_STAT_ERR) || (semStatus == ERROR))
	    {

            ATA_DEBUG_MSG (1, "ataCmd err: status=0x%x semStatus=%d err=0x%x\n",
                           pCtrl->intStatus, semStatus,
                           ATA_IO_BYTE_READ (pCtrl->error), 0, 0, 0);

	    if (++retryCount > ataRetry)
	        return (ERROR);
	    }
	else
	    retry = FALSE;
	}

	switch (cmd)
	    {
	    case ATA_CMD_SEEK:
		ataWait (ctrl, ATA_STAT_SEEKCMPLT);
		break;

	    }

    ATA_DEBUG_MSG (2, "ataCmd end - ctrl %d, drive %d: Ok\n", ctrl, drive, 0, 0, 0, 0);

    return (OK);
    }

/*******************************************************************************
*
* ataPread - Read drive parameters
*
* Read drive parameters.
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS ataPread
    (
    int      ctrl,
    int      drive,
    void     *buffer
    )
    {
    ATA_CTRL *pCtrl	= &ataCtrl[ctrl];
    BOOL     retry	= TRUE;
    int      retryCount	= 0;
    int      semStatus;

    ATA_DEBUG_MSG (2, "ataPread: ctrl=%d drive=%d\n", ctrl, drive, 0, 0, 0, 0);

    while (retry)
	{
        ataWait (ctrl, ATA_STAT_READY);

        ATA_IO_BYTE_WRITE (pCtrl->sdh, ATA_SDH_IBM | (drive << 4));
        ATA_IO_BYTE_WRITE (pCtrl->command, ATA_CMD_READP);
        semStatus = semTake (&pCtrl->syncSem, 
			     sysClkRateGet() * pCtrl->semTimeout);

        if ((pCtrl->intStatus & ATA_STAT_ERR) || (semStatus == ERROR))
	    {

            ATA_DEBUG_MSG (1, "ataPread%d/%d - err: status=0x%x intStatus=0x%x "

                          "error=0x%x semStatus=%d\n", ctrl, drive, 
                          ATA_IO_BYTE_READ (pCtrl->aStatus), pCtrl->intStatus, 
                          ATA_IO_BYTE_READ (pCtrl->error), semStatus);

	    if (++retryCount > ataRetry)
	        return (ERROR);
	    }
        else
	    retry = FALSE;
        }

    ataWait (ctrl, ATA_STAT_DRQ);

    ATA_IO_NWORD_READ_SWAP (pCtrl->data, (short *)buffer, 256);

    ATA_DEBUG_MSG (2, "ataPread end:\n", 0, 0, 0, 0, 0, 0);


    return (OK);
    }

/*******************************************************************************
*
* ataRW - read/write a number of sectors on the current track
*
* Read/write a number of sectors on the current track
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS ataRW
    (
    int ctrl,
    int drive,
    int cylinder,
    int head,
    int sector,
    void *buffer,
    int nSecs,
    int direction
    )
    {
    ATA_CTRL *pCtrl	= &ataCtrl[ctrl];
    ATA_DRIVE *pDrive	= &pCtrl->drive[drive];
    ATA_TYPE *pType	= &ataTypes[ctrl][drive];
    int retryCount	= 0;
    int block		= 1;
    int nSectors;
    int nWords;
    int semStatus;
    short *pBuf;

    ATA_DEBUG_MSG (2, "ataRW: ctrl=%d drive=%d c=%d h=%d s=%d buf=0x%x ",
                   ctrl, drive, cylinder, head, sector, (int)buffer);
    ATA_DEBUG_MSG (2, "n=%d dir=%d\n", nSecs, direction, 0, 0, 0, 0);

retryRW:

    ataWait (ctrl, ATA_STAT_READY);

    pBuf = (short *)buffer;
    nSectors = nSecs;

    ATA_IO_BYTE_WRITE (pCtrl->feature, pType->precomp);
    ATA_IO_BYTE_WRITE (pCtrl->seccnt, nSecs);
    ATA_IO_BYTE_WRITE (pCtrl->sector, sector);
    ATA_IO_BYTE_WRITE (pCtrl->cylLo, cylinder);
    ATA_IO_BYTE_WRITE (pCtrl->cylHi, cylinder>>8);

    if (pDrive->okLba)
        ATA_IO_BYTE_WRITE (pCtrl->sdh,
                           ATA_SDH_LBA | (drive << 4) | (head & 0xf));
    else
        ATA_IO_BYTE_WRITE (pCtrl->sdh,
                           ATA_SDH_IBM | (drive << 4) | (head & 0xf));

    if (pDrive->rwPio == ATA_PIO_MULTI)
	block = pDrive->multiSecs;

    nWords = (pType->bytes * block) >> 1;

    if (direction == O_WRONLY)
	{

        if (pDrive->rwPio == ATA_PIO_MULTI)
	    ATA_IO_BYTE_WRITE (pCtrl->command, ATA_CMD_WRITE_MULTI);
	else
	    ATA_IO_BYTE_WRITE (pCtrl->command, ATA_CMD_WRITE);