mmc_cmd.c

给予mx21处理器的嵌入式系统的mmc卡驱动程序

 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	CMD33  Sets the address of the first sector of the erase group
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
MMCSD_STATUS _MMCSD_TagSectorStart(u32 addr)
{
	MMCSD_Responses rp;
	MMCSD_STATUS ret;
	
	ret=_MMCSD_NoDataCommand(MMCSD_CMD32,addr,MMCSDB_R1,0);	
	
	if(ret)
		return ret;
	
	_MMCSD_GetResponses(&rp,MMCSDB_R1,0);
	
	return rp.status&MMCSD_STATUS_NOERROR;

}
/******************************************************************************
 * Function Name: _MMCSD_TagSectorEnd
 *
 * Input:            U32  addr       address
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	CMD33  Sets the address of the last sector of the erase group
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/

MMCSD_STATUS _MMCSD_TagSectorEnd(u32 addr)
{
	MMCSD_Responses rp;
	MMCSD_STATUS ret;
	
	ret=_MMCSD_NoDataCommand(MMCSD_CMD33,addr,MMCSDB_R1,0);	
	
	
	if(ret)
		return ret;
	
	_MMCSD_GetResponses(&rp,MMCSDB_R1,0);
	
	return rp.status&MMCSD_STATUS_NOERROR;

}

/******************************************************************************
 * Function Name: _MMCSD_Erase
 *
 * Input:    
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	Erase all previous selected blocks.	
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
MMCSD_STATUS _MMCSD_Erase()
{
	MMCSD_Responses rp;
	MMCSD_STATUS ret;
	
	ret=_MMCSD_NoDataCommand(MMCSD_CMD38,0,MMCSDB_R1,0);
	
	if(ret)
		return ret;
	
	_MMCSD_GetResponses(&rp,MMCSDB_R1,0);
	

	return rp.status&MMCSD_STATUS_NOERROR;

}

/******************************************************************************
 * Function Name: _MMCSD_NoDataCommand
 *
 * Input:       
 * 	cmd 		Command Number
 *	arg		Command argument
 *	ctrl		Command control value inculding response type	
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	Send commend to MMC card and wait for response
 *	
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
extern u8 g_mmcsd_cmd[2];

MMCSD_STATUS _MMCSD_NoDataCommand(u8 cmd, u32 arg,u32 ctrl,int port)
{
	MMCSD_STATUS ret;
	u32	int_mask;
	int     timeout = 100;
	
	
	switch(cmd)
	{
		case MMCSD_CMD16:
			timeout =50 ;
			break;

		case MMCSD_CMD6:
			timeout = 3;
			break;

		case MMCSD_CMD25:
			timeout = 50;
			break;
		case MMCSD_CMD38:
			timeout = 100*60*5;
			break;
		default :
			timeout = 100;

	}
	g_mmcsd_cmd[port] = cmd;
	_MMCSD_Mask_interrupt(0x7b,&int_mask,port);

	_MMCSD_StopClk(port);
	_MMCSD_SetCmd(cmd,arg,ctrl,port);
	_MMCSD_StartClk(port);
	if((cmd==MMCSD_CMD13)||(cmd==MMCSD_CMD55))
	{
		ret=_MMCSD_WaitUntil(MMCSD_CMD_DONE,port);
	}
	else
	{
		ret=_MMCSD_irq_WaitUntil(MMCSD_CMD_DONE,cmd,timeout,port);
	}

	_MMCSD_Restore_Mask(int_mask,port);
	
	return ret;	
}

MMCSD_STATUS _MMCSD_irq_WaitUntil(u32 EndCondition,u8 cmd,int timeout,int port)
{

	MMCSD_Dev *device;
	u32	   status,timeleft;

	device = g_selected_lock[port].device;

	if(device==NULL)
	{						//polling
		//TRACE("device is NULL");
		do
		{
			if(port == 1)
			status = mmcsdr_status_2;
			else
			status = mmcsdr_status;
		}
		while ((status&0x2002)==0);
	
		if(status&MMCSD_CMD_TIMEOUT)
		{
			if(port == 1)
			{
				FAILED("CMD Result: 0x%lx",mmcsdr_status_2);
			}
			else
			{
				FAILED("CMD Result: 0x%lx",mmcsdr_status);
			}
		}

		return (status&MMCSD_CMD_TIMEOUT);
	}
	
	if(port == 1)
		status = mmcsdr_status_2;		// Sometimes, the interrupt has happened.
	else
		status = mmcsdr_status;		// Sometimes, the interrupt has happened.

	if((status&(MMCSD_STATUS_ERR|MMCSD_END_CMD_RESP))==0)
	{
		timeleft = interruptible_sleep_on_timeout(&(device->select_wait),timeout);
		if(!timeleft)
		{
			if(port == 1)
				status = mmcsdr_status_2;		// Sometimes, the interrupt has happened.
			else
				status = mmcsdr_status;		// Sometimes, the interrupt has happened.
			if((status&(MMCSD_STATUS_ERR|MMCSD_END_CMD_RESP))==0)
			{
				FAILED("Time Out, mmcsdr_status = 0x%lx, cmd%d",(unsigned long)status,cmd);
				return MMCSD_ERROR;
			}
			TRACE("Time Out!,cmd%d",cmd);
		}
		else
		{
			status = device->result;
		}
	}
	if(status&MMCSD_STATUS_ERR)
	{
		//FAILED("error, status is 0x%0lX,(cmd%d) ",status,cmd);
		return(status&MMCSD_STATUS_ERR);
	}	

	if(EndCondition == MMCSD_CMD_DONE)
	{
		if((status&MMCSD_END_CMD_RESP)==0)
		{
			FAILED("error, status is 0x%0lX,(cmd%d)",(unsigned long)status,cmd);
			return(MMCSD_ERROR);
		}
	}

	return (MMCSD_OK);
	
}

void _MMCSD_Mask_interrupt(u32 mask, u32 *orig, int port)
{
	if(port == 1)
	{
		*orig = mmcsdr_int_mask_2;
		mmcsdr_int_mask_2 = mask;
		TRACE("Int_mask is 0x%0X",(unsigned long)mmcsdr_int_mask_2);
	}

	else
	{
		*orig = mmcsdr_int_mask;
		mmcsdr_int_mask = mask;
		TRACE("Int_mask is 0x%0X",(unsigned long)mmcsdr_int_mask);
	}
}
void _MMCSD_Restore_Mask(u32 orig,int port)
{
	if(port == 1)
		mmcsdr_int_mask_2 = orig;
	else
		mmcsdr_int_mask = orig;
//	TRACE("*mmcsdr_int_mask = 0x%x",*mmcsdr_int_mask);
}

/******************************************************************************
 * Function Name: _MMCSD_WaitUntil
 *
 * Input:       
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	Wait until Command done
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
MMCSD_STATUS _MMCSD_WaitUntil(u32 EndCondition,int port)
{
	//waiting for the End Cmd Response
	volatile u32 status;
	u32 counter = 0xFFFFFFFF;

	do{
		if(port == 1)
			status = mmcsdr_status_2;
		else 
			status = mmcsdr_status;
			
		counter--;
		if(counter==0)
		{
			TRACE("Time Out.");
			return MMCSD_ERROR;
		}
		//TRACE("staus is %lx",status);
	}
	while ((status&(MMCSD_END_CMD_RESP|MMCSD_STATUS_ERR))==0);	
	
//	if(status&MMCSD_STATUS_ERR)
	if(status&(MMCSD_READ_TIMEOUT|MMCSD_WRITE_CRC) != 0)
	{
		if(port == 1)
		{
			FAILED(" CMD Result: 0x%lx",mmcsdr_status_2);
		}
		else
		{
			FAILED(" CMD Result: 0x%lx",mmcsdr_status);
		}
	}

//	return (status&MMCSD_STATUS_ERR);
	return (status&(MMCSD_READ_TIMEOUT|MMCSD_WRITE_CRC));
	
}

/******************************************************************************
 * Function Name: _MMCSD_SetWriteProt
 *
 * Input:    
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 * 	this routine will set the write protection bit for the addressed
 * 	group.
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
MMCSD_STATUS _MMCSD_SetWriteProt(u32	addr)
{
	MMCSD_Responses rp;
	MMCSD_STATUS ret;
	
	ret=_MMCSD_NoDataCommand(MMCSD_CMD28,addr,MMCSDB_R1,0);
	
	if(ret)
		return ret;
	
	_MMCSD_GetResponses(&rp,MMCSDB_R1,0);
	

	return rp.status&MMCSD_STATUS_NOERROR;

}
/******************************************************************************
 * Function Name: _MMCSD_ClearWriteProt
 *
 * Input:    
 *
 * Value Returned:     
 *
 * 	MMCSD_STATUS
 *
 * Description: 
 *	This routine will clear the write protection bit for the addressed
 *	group.
 *
 * Modification History:
 *      30 DEC,2001, Initial version.                   Yiwei Zhao 
 *****************************************************************************/
MMCSD_STATUS _MMCSD_ClearWriteProt(u32 addr)
{
	MMCSD_Responses rp;
	MMCSD_STATUS ret;
	
	ret=_MMCSD_NoDataCommand(MMCSD_CMD29,addr,MMCSDB_R1,0);
	
	if(ret)
		return ret;
	
	_MMCSD_GetResponses(&rp,MMCSDB_R1,0);
	

	return rp.status&MMCSD_STATUS_NOERROR;

}

MMCSD_STATUS _MMCSD_SetBusWidth(u32 rca, u32 width,u32 port)
{
	 MMCSD_Responses rp;
	 MMCSD_STATUS ret;
	 u32	para;
	 
	 //TRACE("Set Bus Width =%d",width);
	 ret=_MMCSD_NoDataCommand(MMCSD_CMD55,rca<<16,MMCSDB_R1,port);
	 if(ret)
	 {
		 TRACE("CMD55 failed with ret = 0x%lx",ret);
		 return ret;
	 }
	 _MMCSD_GetResponses(&rp,MMCSDB_R1,port);

//	 para = (rca<<16)|width;
	 para = width;
	 ret=_MMCSD_NoDataCommand(MMCSD_ACMD6,para,MMCSDB_R1,port);
	 if(ret) 
	 {
		 TRACE("ACMD6 failed with ret = 0x%lx",ret);
	 	 return ret; //meet some error 
	 }
	 	
	 _MMCSD_GetResponses(&rp,MMCSDB_R1,port);
	
	 return MMCSD_OK;
}
/*
MMCSD_STATUS _MMCSD_SendSCR(UINT32 rca,MMCSD_Responses *rp)
{
	 MMCSD_STATUS ret;
	 
	 ret=_MMCSD_NoDataCommand(MMCSD_CMD55,rca<<16,MMCSDB_R1);
	 if(ret)
	 {
		 FAILED("CMD55 failed with ret = 0x%lx",ret);
		 return ret;
	 }
	 _MMCSD_GetResponses(rp,MMCSDB_R1);

	 ret=_MMCSD_NoDataCommand(MMCSD_ACMD51,0,MMCSDB_R1);
	 if(ret) 
	 {
		 FAILED("ACMD6 failed with ret = 0x%lx",ret);
	 	 return ret; //meet some error 
	 }
	 	
	 _MMCSD_GetResponses(rp,MMCSDB_R1);
	
	 return MMCSD_OK;
}
*/