mmcoem.c

WINDOWSCE4.2 ARM PXA255 SDMMC驱动程序源代码

*       portAddress     Base Address
*       cmd             Command index
*       arg             Argument
*
* Output:
*       6-byte command is sent to the card
*
* Return:
*       Complete code
*         
* Function: send the command to MMC card. CRC is not needed for
*           the FPGA controller.
*
***************************************************************************/
SDVOID MMCSendCommand( UINT32 Arg, UINT16 Cmd, UINT16 crcDATA)
{
    UINT16  dtmp;

    dtmp = (UINT16)crcDATA;
         
    /* Set up the argument. */
    dtmp = (UINT16)(Arg >> 16);
	v_pMMCReg->argh = dtmp;
    dtmp = (UINT16)(Arg & 0xFFFF);
	v_pMMCReg->argl = dtmp;
    /* Set up the command. */
    dtmp = (Cmd & 0x7F);
	v_pMMCReg->cmd = dtmp;
}

     
/***************************************************************************
* Name: getMMCResponseInfo - Get the response from MMC card
*
* Description:
*       Get the response from MMC card
*
* Input:
*       RespBuff        Response buffer
*       RespLength      Length of the response
*
* Output:
*       Response information
*
* Return:
*       MMC Error code
*
***************************************************************************/
MMC_CC getMMCResponseInfo(UCHAR *respBuff, UINT16 respLength, UINT16 respType)
{
    UINT16  dtmp, dtimer;
    UINT16  i;

    i = respType;    /* Make compiler happy! */

    /* Timer count for an MMC response */
    dtimer = 0x0FFF;

    /* Clear the FIFO buffer */
    
	dtmp = v_pMMCReg->rxfifo;
	dtmp = v_pMMCReg->txfifo;
    while ( dtimer )
    {
        /* Read status and wait for proper response */
		dtmp = v_pMMCReg->stat;
        dtimer--;

        /* Check for TIME OUT on response */
        if ( dtmp & TIME_OUT_RESPONSE )
        {
            return MMC_CARD_IS_NOT_RESPONDING;
        }
        /* Check for CRC on response */
        else if ( dtmp & RESP_CRC_ERR)
        {
            return (MMC_CMD_CRC_ERROR );
        }
        else if ( dtmp & CRC_WR_ERR )
        {
            return MMC_DATA_STATUS_CRC_ERROR;
        }
        /* Check for CRC read error */
        else if ( dtmp & CRC_RD_ERR )
        {
            return MMC_DATA_STATUS_CRC_ERROR;
        }
        /* Check for command response */
        else if ( dtmp & END_CMD_RES )
        {
            /* Get the command response information */
            dtmp = (respLength + 1) & 0xFE;
            respLength = dtmp;
            i = 0;
            while ( i < respLength )
            {
				dtmp = v_pMMCReg->res;
                respBuff[i] = (UCHAR)(dtmp >> 8);
                i++;
                respBuff[i] = (UCHAR)(dtmp & 0xFF);
                i++;
            }

            /* No error return */
            return MMC_NO_ERROR;
        }
    }

    return (MMC_CARD_IS_NOT_RESPONDING);
}

/***************************************************************************
* Name: MMCTransmit - Handle data from host to device
*
* Description:
*       Write data to the device. This routine handles single
*       block (WRITE SINGLE BLOCK command) or multiple blocks
*       (WRITE MULTIPLE BLOCK command) data transfer.
*
* Input:
*       pc              Device controller structure
*       dataLength      Data block length
*       noBLocks        Number of sectors to transfer
*       xferMode        Single or mulitiple mode transfer
*
* Output:
*       Data is written to the device.
*
* Return:
*       MMC Status code
*
***************************************************************************/
MMC_CC MMCTransmit(UCHAR *dBuf, UINT16 dataLength, UINT16 noBlocks, UINT16 xferMode)
{
    UINT8  *dBufPtr;
    UINT16  dLength;
    UINT16  y;

    // Set up the buffer 
    dBufPtr = (UINT8 *)dBuf;
	dLength = dataLength;
        data_trans_flag = 1;
	v_pMMCReg->imask = MASK_ON_TXFIFO_WR_REQ;

	while(dLength)
	{
		while(!(v_pMMCReg->ireg & 0x40))
		{
			//WaitForSingleObject(gSDMMCIntrEvent, 200);
			InterruptDone(SYSINTR_SDMMC);
		}

		if(dLength%32==0)
		{
			for(y = 0; y<32; y++)
			{
				v_pMMCReg->txfifo = *dBufPtr;
//				RETAILMSG(1, (TEXT("MMCTransmit -- get data dBufPtr[%d] = 0x%x\r\n"), y, *dBufPtr)); 
				dBufPtr++;
				dLength--;
			}
		}
		else
		{	v_pMMCReg->prtbu= BUFF_PARTIAL_FULL;
			for(y = 0; y<dLength; y++)
			{
				v_pMMCReg->txfifo = *dBufPtr;
//				RETAILMSG(1, (TEXT("MMCTransmit -- get data dBufPtr[%d] = 0x%x\r\n"), y, *dBufPtr)); 
				dBufPtr++;
				dLength--;
			}

		}
	}


	v_pMMCReg->imask = MASK_ON_DATA_TRAN_DONE;		// Data Transfer Done
	while(!(v_pMMCReg->stat & 0x00000800))
	{
		WaitForSingleObject(gSDMMCIntrEvent, INFINITE);
		InterruptDone(SYSINTR_SDMMC);
	}
													// MMC Prog Done
	v_pMMCReg->imask = MASK_ON_PRG_DONE;
	while((v_pMMCReg->stat & 0x00001000)==0x00000000)
	{
		WaitForSingleObject(gSDMMCIntrEvent, INFINITE);
		InterruptDone(SYSINTR_SDMMC);
	}
	v_pMMCReg->imask = MASK_OFF_ALL;

//	RETAILMSG(1, (TEXT( "DATA_TRAN_DONE done!!! ireg is %x.\r\n"),v_pMMCReg->ireg ));
        data_trans_flag = 0;
	return MMC_NO_ERROR;
   
}

/***************************************************************************
* Name: MMCReceive - Handle data from target to host
*
* Description:
*       Read data from the device.  This routine handles single
*       block (READ SINGLE BLOCK command) or multiple blocks (READ
*       MULTIPLE BLOCK command) data transfer.
*
* Input:
*       pc              Controller structure
*       dataLength      Data block length
*       noBLocks        Number of sectors to transfer
*       xferMode        Single or mulitiple mode transfer
*
* Output:
*       Data Buffer is filled
*
* Return:
*       MMC status code
*
***************************************************************************/

MMC_CC MMCReceive(UCHAR *dBuf, UINT16 dataLength, UINT16 noBlocks, UINT16 xferMode)
{
    UINT8  *dBufPtr;
 //   UINT16  dtmp, dtimer;
 //   UINT16  dStatus;
    UINT16  dLength;
   // UINT16  nLoops, x; 
     UINT16 y , z;
     int i;
        // Set up the buffer 
//	NKDbgPrintfW(1, (TEXT("MMCReceive -- dataLength =%d, noBlock = %d\r\n"), dataLength, noBlocks)); 
    
	dBufPtr = (UINT8 *)dBuf;
    z = 0;
    
		v_pMMCReg->imask = MASK_ON_RXFIFO_RD_REQ;
        data_trans_flag = 1;
//  NKDbgPrintfW(TEXT("MMCReceive -- noBlocks %d, dLength = %d\r\n"),  noBlocks,dLength);

  for (i=0; i<noBlocks; i++)
  {
	  dLength = dataLength;
   //   NKDbgPrintfW(TEXT("MMCReceive -- noBlocks %d\r\n"),  i);
	while(dLength)
	{
		if(dLength%32==0)
		{
		  	//wait for xmit_fifo_empty

			while(!(v_pMMCReg->ireg & 0x20))
			{
				//WaitForSingleObject(gSDMMCIntrEvent, 200);
				InterruptDone(SYSINTR_SDMMC);
			}
					
			for(y = 0; y<32; y++)
			{
				*dBufPtr = (v_pMMCReg->rxfifo & 0x00FF);
			//	NKDbgPrintfW(TEXT("MMCReceive -- get data dBufPtr[%d] = %x, dLength = %d\r\n"), y, *dBufPtr, dLength); 
				dBufPtr++;
				dLength--;
			}
		}
		else
		{ 
			v_pMMCReg->prtbu = BUFF_PARTIAL_FULL;
			
			for(y = 0; y<dLength; y++)
			{
				*dBufPtr = (v_pMMCReg->rxfifo & 0x00FF);
//				RETAILMSG(1, (TEXT("MMCReceive !!-- get data dBufPtr[%d] = %x, dLength = %d\r\n"), y, *dBufPtr, dLength)); 
				dBufPtr++;
				dLength--;
			}

		}
	}
  }

//	NKDbgPrintfW(TEXT("MMCReceive -- Finishing data transfer\r\n"));

	v_pMMCReg->imask  = MASK_ON_DATA_TRAN_DONE;		// Data Transfer Done
	while(!(v_pMMCReg->stat & RD_DATA_AVAILABLE))
	{
	//	v_pBLReg->hex_led=0xbbbbbbbb;
		WaitForSingleObject(gSDMMCIntrEvent, INFINITE);
		InterruptDone(SYSINTR_SDMMC);
	}
	v_pMMCReg->imask  = MASK_OFF_ALL;
 //  NKDbgPrintfW(TEXT("MMCReceive -- data transfer done interrupt\r\n"));

	v_pMMCReg->strpc  = STOP_CLOCK;					// stop clock
	while((v_pMMCReg->stat & CLOCK_ENABLE ));		// wait for clock to stop
        data_trans_flag = 0;
	// v_pBLReg->hex_led=0xcccccccc;
   // NKDbgPrintfW(TEXT("MMCReceive -- wait for STOP_CLOCK\r\n"));
	return MMC_NO_ERROR; 
		
}

/***************************************************************************
* Name: MMCSetupXfer
*
* Description:
*       Set up information and configure the MMC controller
*
* Input:
*       pc              Device controller structure
*       cmdIndex        Command index
*       noBlocks        Number of blocks to transfer
*       respType        Type of response
*
* Output:
*       All related Registers are update
*       
* Return:
*       None
*         
***************************************************************************/
SDVOID MMCSetupXfer( UINT16 cmdIndex, UINT16 nBlocks, UINT16 respType)
{
    UINT16  cmdDatContReg;
    UINT16  blkLength;
    UINT16  noBlocks = nBlocks;

    cmdDatContReg = NO;
    blkLength = 0;
    setupMMcHostDataRegister(cmdIndex, &cmdDatContReg, &noBlocks, &blkLength);

    if (cmdIndex != SSTOP_TRANSMISSION)
    {
        /* If None Data Transfer type, just skip */
        if ( cmdDatContReg != NO )
        {
            /* BLOCK LENGTH */
			v_pMMCReg->blkle = blkLength;

            /* NUMBER OF BLOCK */
			v_pMMCReg->nob = noBlocks;
        }
    }

    /* COMMAND DATA */
    cmdDatContReg |= respType;

    /* Set up the hardware */
	v_pMMCReg->cmdat = cmdDatContReg;
}


/***************************************************************************
* Name: MMCPrepareAndSetup
*
* Description:
*       Set up information and Send the command to MMC card
*
* Input:
*       pc              Device controller structure
*       Cmd             Command index
*       Arg             Argument
*       noBlocks        Number of blocks to transfer
*       respType        Type of response
*
* Output:
*       Command is written to the device
*       
* Return:
*       MMC status code
*         
***************************************************************************/
SDBOOL MMCPrepareAndSetup(UINT32 Arg, UINT16 Cmd, UINT16 noBlocks, UINT16 Resp)
{
    /* Stop the clock to set up the requested information */
    if ( !stopMMCClock() )
        return NO;

    /*
    Setup the command. CRC is not needed because the MMC controller 
    can generate the CRC.
    */
    MMCSendCommand( Arg, Cmd, 0 );

    /* Setup the transfer */
    MMCSetupXfer( Cmd, noBlocks, Resp );

    /* Start the clock to execute the request */
    startMMCClock();

    return YES;
}


/***************************************************************************
* Name: checkCardBusy
*
* Description:
*       Test the READY/BUSY status of the MMC card.
*
* Input:
*       UINT16 inData   not used
*
* Output:
*       None
*
* Return:
*       True or False
*         
***************************************************************************/
SDBOOL checkCardBusy(UINT16 inData)
{
    UINT16  dStatus, dtimer;

    dtimer = 0x200;

    /*
    Wait for BUSY to go off before the next transfer. The
    device may very well be programmed data into the flash memory.
    */
    while ( dtimer )
    {
        /* Get status */
        dStatus = v_pMMCReg->stat;

        /* Check for the availability of the device for next transfer */
        if ((dStatus & DONE_PROG_RDWR) || (dStatus & DONE_WDATA_XFER) ) 
            return YES;

        dtimer--;
    }

    /* The device is busy ... */
        return NO;
}