at91cfdev.c

(1)基于部分u-boot代码自己调试的vxworks BSP (2)实现了nand/nor flash的tffs文件系统 (3)实现了对spi dataflash的访问 (4)实现了对启动参数

/*******************************************************************************
*
* cfcBlkWrt - write one or more blocks to a cfc disk
*
* This routine writes one or more blocks to the specified device,
* starting with the specified block number.
*
* If any block offset was specified during cfcDevCreate(), it is added
* to <startBlk> before the transfer takes place.
*
* RETURNS: OK, ERROR if the write command didn't succeed.
*/

LOCAL STATUS cfcBlkWrt
    (
    AT91PS_CF_Card_Device pcfcDev,
    int startBlk,
    int nBlks,
    char *pBuf
    )
    {
    return (cfcBlkRW (pcfcDev, startBlk, nBlks, pBuf, O_WRONLY));
    }

/*******************************************************************************
*
* cfcReset - reset a cfc disk controller
*
* This routine resets a cfc disk controller.
*
* RETURNS: OK, always.
*/

LOCAL STATUS cfcReset
    (
    AT91PS_CF_Card_Device pcfcDev
    )
    {
    
    semTake (&cfcMuteSem, WAIT_FOREVER);

 /*  cfcInit ();*/

    semGive (&cfcMuteSem);

    return (OK);
    }

/*******************************************************************************
*
* cfcIoctl - do device specific control function
*
* This routine is called when the file system cannot handle an ioctl()
* function.
*
* RETURNS:  OK or ERROR.
*/

LOCAL STATUS cfcIoctl
    (
    AT91PS_CF_Card_Device pcfcDev,
    int function,
    int arg
    )
    {
    FAST int status = ERROR;

    semTake (&cfcMuteSem, WAIT_FOREVER);

    switch (function)
	{
	case FIODISKFORMAT:

	    status = OK;
	    break;

	default:
	    (void) errnoSet (S_ioLib_UNKNOWN_REQUEST);
	}

doneIoctl:
    semGive (&cfcMuteSem);
    return (status);
    }



/*******************************************************************************
*
* cfcBlkRW - read or write sectors to a cfc disk.
*
* Read or write sectors to a cfc disk.
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS cfcBlkRW
    (
    AT91PS_CF_Card_Device pCFC,
    int startBlk,
    int nBlks,
    char *pBuf,
    int direction
    )
    {
    BLK_DEV *pBlkDev = &pCFC->blkDev;
    int src,ix,i ; 
    int status = ERROR;
    int semStatus = 0;
    char databuf[1200];
    int Max_Read_DataBlock_Length = pCFC->pagesize;
    startBlk+=pCFC->blkOffset;
    src = startBlk; /* Max_Read_DataBlock_Length;*/
    semTake (&cfcMuteSem, WAIT_FOREVER);
    memset(databuf,0,1200);
if(direction==O_RDONLY)
{
    for (ix = 0; ix < nBlks; ix ++)
    {

	/*AT91F_CF_READ16_SECTOR(pCFC,src,databuf,Max_Read_DataBlock_Length);*/
	AT91F_CF_READ16_SECTOR((short*)databuf,(src&0xff000000)>>24,(src&0xff0000)>>16,(src&0xff00)>>8,src&0xff);
	semStatus = cfcWaitReady(AT91C_CFC_TIMEOUT);
	if ((cfcStatus & STAT_ERR) || (semStatus == ERROR))
        goto errorRW;

	AT91F_CF_RDY();       
	memcpy(pBuf,databuf, pBlkDev->bd_bytesPerBlk);        

#ifdef __TEST__
	if(memcmp(pBuf,gpCache+src, pBlkDev->bd_bytesPerBlk)!=0)
	{
		fprintf(stderr,"not the same \n");
	}
#endif	
        src ++;/*= Max_Read_DataBlock_Length ;*/
        pBuf += pBlkDev->bd_bytesPerBlk;/*Max_Read_DataBlock_Length;*/
    }
}else
{
    for (ix = 0; ix < nBlks; ix ++)
    {
#ifdef __TEST__
		memcpy(gpCache+src,pBuf,pBlkDev->bd_bytesPerBlk);		        
#endif	
	    memcpy(databuf,pBuf,pBlkDev->bd_bytesPerBlk);
		AT91F_CF_WRITE16_SECTOR((unsigned short*)databuf,(src&0xff000000)>>24,(src&0xff0000)>>16,(src)>>8,src&0xff);
		AT91F_CF_RDY();
		semStatus = cfcWaitReady(AT91C_CFC_TIMEOUT);
		if ((cfcStatus & STAT_ERR) || (semStatus == ERROR))
	        goto errorRW; 
/*		AT91F_DataFlashWrite(pCFC , (unsigned int*) databuf ,src,Max_Read_DataBlock_Length);
		semStatus =OK;
*/
	        
#ifdef __TEST__	 
		
		AT91F_CF_RDY();

		AT91F_CF_READ16_SECTOR((short*)databuf,(src&0xff000000)>>24,(src&0xff0000)>>16,(src&0xff00)>>8,src&0xff);
		semStatus = cfcWaitReady(AT91C_CFC_TIMEOUT);
		if ((cfcStatus & STAT_ERR) || (semStatus == ERROR))
        	goto errorRW;
		AT91F_CF_RDY();
		/*AT91F_DataFlashRead(pCFC,src,Max_Read_DataBlock_Length,databuf);*/
		if(0!=memcmp(databuf,pBuf,pBlkDev->bd_bytesPerBlk))
		{
			fprintf(stderr,"write cfc error \n");	
		}        
        
#endif        
        src ++; /*= Max_Read_DataBlock_Length ;*/
        pBuf += pBlkDev->bd_bytesPerBlk; /*Max_Read_DataBlock_Length;*/
     }
}
    status = OK;

errorRW:
    if (status == ERROR)
        (void)errnoSet (S_ioLib_DEVICE_ERROR);
    semGive (&cfcMuteSem);
    return (status);
    }

/*******************************************************************************
*
* cfcIntr - cfc controller interrupt handler.
*
* RETURNS: N/A
*/

LOCAL void cfcIntr
    (
    int ctrl
    )
    {

/*cfcStatus = ( AT91C_BASE_SPI->SPI_SR & AT91C_BASE_SPI->SPI_IMR );*/

/*AT91F_DataFlashHandler(pDataFlash_Device->pDataFlashDesc,cfcStatus);*/
semGive (&cfcSyncSem);

  }

/*******************************************************************************
*
* cfcIntr - cfc controller watchdog handler.
*
* RETURNS: N/A
*/

LOCAL void cfcWdog
    (
    int ctrl
    )
    {
    cfcWaitForever = FALSE;
    }

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

LOCAL void cfcWait
    (
    int request
    )
    {
	cfcWaitReady(AT91C_CFC_TIMEOUT);
	

    if (cfcDebug)
	printErr ("cfcWait end: \n");
    }

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

LOCAL void cfcInit (void)
    {
 /*   AT91F_CfgSPIForDataFlash();*/
 
 	
    if (cfcDebug)
	printErr ("cfcInit end: \n");
    }

/*******************************************************************************
*
* cfcDiagnose - diagnose the drive
*
* Diagnose the drive
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS cfcDiagnose (void)
    {

    return (OK);
    }









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

LOCAL STATUS cfcPread
    (
    int drive,
    void *buffer
    )
    {
 

    return (OK);
    }
/*******************************************************************************
*
* cfcRecalib - recalibrate the drive
*
* Recalibrate the drive
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS cfcRecalib
    (
    int drive
    )
    {
 
    return (OK);
    }

/*******************************************************************************
*
* cfcSeek - seek the drive heads to the specified cylinder
*
* Seek the drive heads to the specified cylinder
*
* RETURNS: OK, ERROR if the command didn't succeed.
*/

LOCAL STATUS cfcSeek(int drive, int cylinder, int head)
{

 
    return (OK);
    }

/*******************************************************************************
*
* cfcRW - 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.
*/



/*******************************************************************************
*
* cfcFormat - format the current track
*
* format the current track; not supported.
*
* RETURNS: ERROR always.
*/

LOCAL STATUS cfcFormat
    (
    int drive,
    int cylinder,
    int head,
    int interleave
    )
    {
    return (ERROR);
    }


/*******************************************************************************
*
* fdStatusChk - check a status of a floppy disk
*
* This routine checks for a disk change on devices.
*
* RETURNS: OK.
*/

LOCAL STATUS cfcStatusChk
    (
    AT91PS_CF_Card_Device pcfcDev
    )
    {
/* pcfcDev->blkDev.bd_readyChanged	= TRUE;*/
 pcfcDev->blkDev.bd_mode = O_RDWR;
 #if 0
    FD_TYPE *pType = &fdTypes[pFdDev->fdType];

    wdCancel (fdWid);
    semTake (&fdMuteSem, WAIT_FOREVER);

    sysOutByte (FD_REG_OUTPUT, fdDORvalues[pFdDev->drive]); 
    sysDelay ();

    /* 
     * Bit 7 is set when a diskette is changed.
     * To clear the bit, we need to perform a seek.  
     */

    if (sysInByte (FD_REG_INPUT) & 0x80)
	{
	pFdDev->blkDev.bd_readyChanged	= TRUE;

	/* do seek to clear DCHG bit in FD_REG_INPUT */

	if (++fdCylinder >= pType->cylinders)
	    fdCylinder = 1;

        fdDriveSelect (pFdDev->fdType, pFdDev->drive);
	(void) fdSeek(pFdDev->drive, fdCylinder, 0);

        /* set the bd_mode per the WP tab */

        pFdDev->blkDev.bd_mode =
			(fdDriveIsWP(pFdDev->drive))? O_RDONLY : O_RDWR;
	}
    
    semGive (&fdMuteSem);
    wdStart (fdWid, (sysClkRateGet() * fdWdSec), 
		(FUNCPTR)fdDriveRelease, 0);
#endif		
    return (OK);
    }





void cfPrompt( DOS_VOL_CONFIG *pConfig )
{
	pConfig->fatType = 12 ;     /* M- Fat format Type */
    pConfig-> volSerial =0x12345678;     /* M- disk serial number */
	pConfig->sysId = "VXDOS12";
    strcpy(pConfig->volLabel,"CF Card");
   
}