mmcio.c

How to control MMC interface under SZ platform

/******************************************************************************

 C   H E A D E R   F I L E

 (c) Copyright Motorola Semiconductors Hong Kong Limited 1999 - 2002
 ALL RIGHTS RESERVED

*******************************************************************************

 Project Name : Portable Personal System Manager - GT version 2.0
 Project No.  : PDAPSM05
 Title        : 
 File Name    : MMCIO.h	
 Last Modified: Jan 31, 2002

 Description  : 

 Assumptions  : Hardware IO functions
 
 Dependency Comments :

 Project Specific Data :

******************************************************************************/
#include "mmclocal.h"

/******************************************************************************

 Function Name    : _PortAsetting()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Set Port A

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _PortRsetting()
{
	//IODCR (0x8000 = 8mA, 0x0000 = 4mA) for IO drive strength
	//*(P_U16)IODCR = 0x8000; //TEST
	
	*(P_U8)PORT_PRPUEN			=0x3f;		//pull-up pull-down
	*(P_U8)PORT_PRSEL			=0x00;		//dedicated io select


}

/******************************************************************************

 Function Name    : _MMCChectHardwareRevision()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : U32		0:Sucess  1: Error

 Description      : Check hardware revision 

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/

MMC_STATUS _MMCChectHardwareRevision()
{
	U16 static HardwareID;
		//obtain Hardware Revision No & Card Detect Input
	
	HardwareID 		=*(P_U16)MMCR_REV_NO;
	//Check the HardwareID is 0x0370
	if(HardwareID!=0x0380)
		return MMC_HARDWARE_REV;               //Hardware Revision Error;
	return 0;
}

/******************************************************************************

 Function Name    : _MMCSoftReset()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : U32		0:Success  1: Error

 Description      : Soft reset 

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/

MMC_STATUS _MMCSoftReset()
{	
	//system reset
	_PortRsetting();
	
	*(P_U16)MMCR_STR_STP_CLK=0x08;
	while ((*(P_U16)MMCR_STATUS)!=0x00);
	
	//system reset, MMC core enable & Stop clk
	*(P_U16)MMCR_STR_STP_CLK=0x0d;
	while ((*(P_U16)MMCR_STATUS)!=0x00);
	
	//MMC Core enable & Stop clk
	_MMCStopClk();
	while ((*(P_U16)MMCR_STATUS)!=0x40);
	
	//Set MMC Clock Rate Register  PerScaler=0x6 ClockRate=0x6
	*(P_U16)MMCR_CLK_RATE=0x36;   
	
	//Set MMC Read Time Out Register
	*(P_U16)MMCR_READ_TO=0xFFFF;
	
	//Set MMC Response Time-Out Register
	*(P_U16)MMCR_RES_TO=0xFF;
	
	//Set Block length register
	*(P_U16)MMCR_BLK_LEN=MMC_BLOCK_SIZE;
	
	//Set MMC Number of Blocks Register
	*(P_U16)MMCR_NOB=1;
	
	return 0;
	
}

/******************************************************************************

 Function Name    : _MMCSetCmd(U8 cmd,U32 arg,U32 ctrl)

 Input Parameters : U8	cmd			:Command Number
 					U32 arg			:Command Argument
 					U32	ctrl		:Command Control register 
 
 Output Parameters: VOID

 Value returned   : U32		0:Success  1: Error

 Description      : Set some command registers 

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCSetCmd(U8 cmd,U32 arg,U32 ctrl)
{
	TRACE("	----------------------------------------\n");
	TRACE("	CMD%02d  		Arg: 0x%08X  Ctrl: 0x%04X\n",cmd,arg,ctrl);

	*(P_U16)MMCR_CMD=cmd;
	*(P_U16)MMCR_ARGUMENTH=arg>>16;
	*(P_U16)MMCR_ARGUMENTL=arg&0xFFFF;
	*(P_U16)MMCR_CMD_DAT_CONT=ctrl;
	
	_gLastErrorCmd=cmd;	
}

/******************************************************************************

 Function Name    : _MMCIsRun()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : U8		0:Running  1: No Running

 Description      : Set some command registers 

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
U8 _MMCIsRun()
{
	if((*(P_U16)MMCR_STATUS)&0x100)
		return 1;
	else 
		return 0;
}

/******************************************************************************

 Function Name    : _MMCStartClk()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Start MMC Clock

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCStartClk()
{
	*(P_U16)MMCR_STR_STP_CLK=0x06;
	while(((*(P_U16)MMCR_STATUS)&0x100)==0);
		
}

/******************************************************************************

 Function Name    : _MMCStopClk()

 Input Parameters : VOID
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Stop MMC Clock

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCStopClk()
{
	int i;
	U16 clk;
	i=0;
	
	*(P_U16)MMCR_STR_STP_CLK=0x05;
	while(((*(P_U16)MMCR_STATUS)&0x100)!=0);
	
}

/******************************************************************************

 Function Name    : _MMCGetResponses(MMC_RESPONSES *pRS,U8 rsType)

 Input Parameters : MMC_RESPONSES *pRS        : buffer
					U8 rsType				  : response type	
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Get Response of MMC Command

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCGetResponses(MMC_RESPONSES *pRS,U8 rsType)
{
	int i;
	static U16 rs;
    static	U32 temp;
	U8 *p;
	if(rsType==MMCB_R1||rsType==MMCB_R6)
	{	
		pRS->status=0;
		rs=*(P_U16)MMCR_RES_FIFO;
		pRS->status|=((U32)rs&0x00FF)<<24;
		rs=*(P_U16)MMCR_RES_FIFO;
		pRS->status|=((U32)rs)<<8;
		rs=*(P_U16)MMCR_RES_FIFO;
		pRS->status|=(rs&0xFF00)>>8;
		TRACE("	Reponses->  0x%08X\n",pRS->status);
		
	}else if(rsType==MMCB_R3)
	{
		pRS->OCR=0;
		rs=*(P_U16)MMCR_RES_FIFO;
		temp=rs&0x00FF;
		pRS->OCR|=temp<<24;
		rs=*(P_U16)MMCR_RES_FIFO;
		pRS->OCR|=((U32)rs)<<8;
		rs=*(P_U16)MMCR_RES_FIFO;
		pRS->OCR|=(rs&0xFF00)>>8;
        TRACE("	Reponses->  0x%08X\n",pRS->OCR);
	}
	else 
	{	p=pRS->CSD;
		for(i=0;i<8;i++)
		{	
			rs=*(P_U16)MMCR_RES_FIFO;
			*(P_U16)p=rs;
			p+=2;
		}
		TRACE(" 	Response-> ");
		for(i=0;i<16;i++)
		{
	 		TRACE(" %02X",pRS->CSD[i]);
		}
		TRACE("\n");
	}
	
}

/******************************************************************************

 Function Name    : _MMCSetBlockLenReg(U16 size)

 Input Parameters : U16 size		: Block Size
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Set block size register

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCSetBlockLenReg(U16 size)
{
	*(P_U16)MMCR_BLK_LEN=size;
}

/******************************************************************************

 Function Name    : _MMCSetNumberOfBlockReg(U16 num)

 Input Parameters : U16 num 	 : Number of block	
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Set Number of block register

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCSetNumberOfBlockReg(U16 num)
{
	*(P_U16)MMCR_NOB=num;
}

/******************************************************************************

 Function Name    : _MMCClockSet(U8 speed)

 Input Parameters : U8 0xFF		High speed	
 
 Output Parameters: VOID

 Value returned   : VOID

 Description      : Set Number of block register

 Cautions         : 
 
 Prev Condition   : VOID

 Post Condition   : VOID

******************************************************************************/
void _MMCClockSet(U8 speed)
{
	if(speed==0xFF)
	{
		*(P_U16)MMCR_CLK_RATE=0x4;
	}
	else
		*(P_U16)MMCR_CLK_RATE=0x36;
}