linux/crypto/ocf/kirkwood/mvHal/mv_hal/pex/mvPex.c

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

#include "pex/mvPex.h"

#include "ctrlEnv/mvCtrlEnvLib.h"

/* defines  */       
#ifdef MV_DEBUG         
#define DB(x)	x
#else                
#define DB(x)    
#endif	             

MV_STATUS mvPexHalInit(MV_U32 pexIf, MV_PEX_TYPE pexType)
{
	MV_PEX_MODE pexMode;
	MV_U32 regVal;
	MV_U32	status;
 
    /* First implement Guideline (GL# PCI Express-2) Wrong Default Value    */
    /* to Transmitter Output Current (TXAMP) Relevant for: 88F5181-A1/B0/B1 */
    /* and 88F5281-B0 and above, 88F5182, 88F5082, 88F5181L, 88F6082/L      */
 
    if ((mvCtrlModelGet() != MV_1281_DEV_ID) &&
	(mvCtrlModelGet() != MV_6281_DEV_ID) &&
	(mvCtrlModelGet() != MV_6192_DEV_ID) &&
    (mvCtrlModelGet() != MV_6190_DEV_ID) &&
	(mvCtrlModelGet() != MV_6180_DEV_ID) &&
        	(mvCtrlModelGet() != MV_6183_DEV_ID) &&
	(mvCtrlModelGet() != MV_6183L_DEV_ID) &&
        	(mvCtrlModelGet() != MV_78100_DEV_ID) &&
        	(mvCtrlModelGet() != MV_78200_DEV_ID) &&
	(mvCtrlModelGet() != MV_76100_DEV_ID) &&
	(mvCtrlModelGet() != MV_78XX0_DEV_ID))
    {

        /* Read current value of TXAMP */
        MV_REG_WRITE(0x41b00, 0x80820000);   /* Write the read command   */

        regVal = MV_REG_READ(0x41b00);      /* Extract the data         */

        /* Prepare new data for write */
        regVal &= ~0x7;                     /* Clear bits [2:0]         */
        regVal |=  0x4;                     /* Set the new value        */
        regVal &= ~0x80000000;              /* Set "write" command      */
        MV_REG_WRITE(0x41b00, regVal);      /* Write the write command  */

    }
    else
    {
        /* Implement 1.0V termination GL for 88F1281 device only */
        /* BIT0 - Common mode feedback */
        /* BIT3 - TxBuf, extra drive for 1.0V termination */
        if (mvCtrlModelGet() == MV_1281_DEV_ID)
        {
                MV_REG_WRITE(0x41b00, 0x80860000);   /* Write the read command   */
                regVal = MV_REG_READ(0x41b00);      /* Extract the data         */
                regVal |= (BIT0 | BIT3);
                regVal &= ~0x80000000;              /* Set "write" command      */
                MV_REG_WRITE(0x41b00, regVal);      /* Write the write command  */

                MV_REG_WRITE(0x31b00, 0x80860000);   /* Write the read command   */
                regVal = MV_REG_READ(0x31b00);      /* Extract the data         */
                regVal |= (BIT0 | BIT3);
                regVal &= ~0x80000000;              /* Set "write" command      */
                MV_REG_WRITE(0x31b00, regVal);      /* Write the write command  */
        }
    }

        if( mvPexModeGet(pexIf, &pexMode) != MV_OK)
        {
                mvOsPrintf("PEX init ERR. mvPexModeGet failed (pexType=%d)\n",pexMode.pexType);
                return MV_ERROR;
        }

        /* Check that required PEX type is the one set in reset time */
        if (pexType != pexMode.pexType)
        {
                /* No Link. Shut down the Phy */
		mvPexPowerDown(pexIf);
                mvOsPrintf("PEX init ERR. PEX type sampled mismatch (%d,%d)\n",pexType,pexMode.pexType);
                return MV_ERROR;
        }

        if (MV_PEX_ROOT_COMPLEX == pexType)
        {
                mvPexLocalBusNumSet(pexIf, PEX_HOST_BUS_NUM(pexIf));
                mvPexLocalDevNumSet(pexIf, PEX_HOST_DEV_NUM(pexIf));
        
                /* Local device master Enable */
                mvPexMasterEnable(pexIf, MV_TRUE);
        
                /* Local device slave Enable */
                mvPexSlaveEnable(pexIf, mvPexLocalBusNumGet(pexIf),
                                                 mvPexLocalDevNumGet(pexIf), MV_TRUE);
		/* Interrupt disable */
		status = MV_REG_READ(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_STATUS_AND_COMMAND));
		status |= PXSAC_INT_DIS;
		MV_REG_WRITE(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_STATUS_AND_COMMAND), status);
        }

        /* now wait 500 ms to be sure the link is valid (spec compliant) */ 
        mvOsDelay(500);
	/* Check if we have link */
	if (MV_REG_READ(PEX_STATUS_REG(pexIf)) & PXSR_DL_DOWN)
	{
		mvOsPrintf("PEX%d interface detected no Link.\n",pexIf);
		return MV_NO_SUCH;
	}

	if (MV_PEX_WITDH_X1 ==  pexMode.pexWidth)
	{
		mvOsPrintf("PEX%d interface detected Link X1\n",pexIf);
	}
	else
	{
		mvOsPrintf("PEX%d interface detected Link X4\n",pexIf);
	}

#ifdef PCIE_VIRTUAL_BRIDGE_SUPPORT
	mvPexVrtBrgInit(pexIf);
#endif
	return MV_OK;
}

/*******************************************************************************
* mvPexModeGet - Get Pex Mode
*
* DESCRIPTION:
*
* INPUT:
*       pexIf   - PEX interface number.
*
* OUTPUT:
*       pexMode - Pex mode structure
*
* RETURN:
*       MV_OK on success , MV_ERROR otherwise
*
*******************************************************************************/
MV_U32 mvPexModeGet(MV_U32 pexIf,MV_PEX_MODE *pexMode)
{
	MV_U32 pexData;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf)
	{
		if (pexIf >= mvCtrlPexMaxIfGet())
		{
			mvOsPrintf("mvPexModeGet: ERR. Invalid PEX interface %d\n",pexIf);
			return MV_ERROR;
		}
	}

	pexData = MV_REG_READ(PEX_CTRL_REG(pexIf));

	switch (pexData & PXCR_DEV_TYPE_CTRL_MASK)
	{
	case PXCR_DEV_TYPE_CTRL_CMPLX:
		pexMode->pexType = MV_PEX_ROOT_COMPLEX;
		break;
	case PXCR_DEV_TYPE_CTRL_POINT:
		pexMode->pexType = MV_PEX_END_POINT;
		break;

	}

    /* Check if we have link */
    if (MV_REG_READ(PEX_STATUS_REG(pexIf)) & PXSR_DL_DOWN)
    {
        pexMode->pexLinkUp = MV_FALSE;
        
        /* If there is no link, the auto negotiation data is worthless */
        pexMode->pexWidth  = MV_PEX_WITDH_INVALID;
    }   
    else
    {
        pexMode->pexLinkUp = MV_TRUE;

        /* We have link. The link width is now valid */
        pexData = MV_REG_READ(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_LINK_CTRL_STAT_REG));
        pexMode->pexWidth = ((pexData & PXLCSR_NEG_LNK_WDTH_MASK) >> 
                             PXLCSR_NEG_LNK_WDTH_OFFS);
    }

    return MV_OK;
}


/* PEX configuration space read write */

/*******************************************************************************
* mvPexConfigRead - Read from configuration space
*
* DESCRIPTION:
*       This function performs a 32 bit read from PEX configuration space.
*       It supports both type 0 and type 1 of Configuration Transactions 
*       (local and over bridge). In order to read from local bus segment, use 
*       bus number retrieved from mvPexLocalBusNumGet(). Other bus numbers 
*       will result configuration transaction of type 1 (over bridge).
*
* INPUT:
*       pexIf   - PEX interface number.
*       bus     - PEX segment bus number.
*       dev     - PEX device number.
*       func    - Function number.
*       regOffs - Register offset.       
*
* OUTPUT:
*       None.
*
* RETURN:
*       32bit register data, 0xffffffff on error
*
*******************************************************************************/
MV_U32 mvPexConfigRead (MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func, 
                        MV_U32 regOff)
{
#if defined(PCIE_VIRTUAL_BRIDGE_SUPPORT)
        return mvPexVrtBrgConfigRead (pexIf, bus, dev, func, regOff);
}

MV_U32 mvPexHwConfigRead (MV_U32 pexIf, MV_U32 bus, MV_U32 dev, MV_U32 func,
                        MV_U32 regOff)
{
#endif
	MV_U32 pexData = 0;
	MV_U32	localDev,localBus;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf)
	{
		if (pexIf >= mvCtrlPexMaxIfGet())
		{
			mvOsPrintf("mvPexConfigRead: ERR. Invalid PEX interface %d\n",pexIf);
			return 0xFFFFFFFF;
		}
	}

	if (dev >= MAX_PEX_DEVICES)
	{
		DB(mvOsPrintf("mvPexConfigRead: ERR. device number illigal %d\n", dev));
		return 0xFFFFFFFF;
	}
	
	if (func >= MAX_PEX_FUNCS)
	{
		DB(mvOsPrintf("mvPexConfigRead: ERR. function num illigal %d\n", func));
		return 0xFFFFFFFF;
	}
	
	if (bus >= MAX_PEX_BUSSES)
	{
		DB(mvOsPrintf("mvPexConfigRead: ERR. bus number illigal %d\n", bus));
		return MV_ERROR;
	}
    	     
    DB(mvOsPrintf("mvPexConfigRead: pexIf %d, bus %d, dev %d, func %d, regOff 0x%x\n",
                   pexIf, bus, dev, func, regOff));
	
	localDev = mvPexLocalDevNumGet(pexIf);
	localBus = mvPexLocalBusNumGet(pexIf);
                                     
    /* Speed up the process. In case on no link, return MV_ERROR */
    if ((dev != localDev) || (bus != localBus))
    {
        pexData = MV_REG_READ(PEX_STATUS_REG(pexIf));

        if ((pexData & PXSR_DL_DOWN))
        {
            return MV_ERROR;
        }
    }

    /* in PCI Express we have only one device number */
	/* and this number is the first number we encounter 
	else that the localDev*/
	/* spec pex define return on config read/write on any device */
	if (bus == localBus)
	{
		if (localDev == 0)
		{
			/* if local dev is 0 then the first number we encounter 
			after 0 is 1 */
			if ((dev != 1)&&(dev != localDev))
			{
				return MV_ERROR;
			}	
		}
		else
		{
			/* if local dev is not 0 then the first number we encounter 
			is 0 */
	
			if ((dev != 0)&&(dev != localDev))
			{
				return MV_ERROR;
			}
		}
		if(func != 0 ) /* i.e bridge */
		{
			return MV_ERROR;
		}
	}
    
    
	/* Creating PEX address to be passed */
	pexData = (bus << PXCAR_BUS_NUM_OFFS);
	pexData |= (dev << PXCAR_DEVICE_NUM_OFFS);
	pexData |= (func << PXCAR_FUNC_NUM_OFFS);
	pexData |= (regOff & PXCAR_REG_NUM_MASK); /* lgacy register space */
	/* extended register space */
	pexData |=(((regOff & PXCAR_REAL_EXT_REG_NUM_MASK) >> 
				PXCAR_REAL_EXT_REG_NUM_OFFS) << PXCAR_EXT_REG_NUM_OFFS);

	pexData |= PXCAR_CONFIG_EN; 
	
	/* Write the address to the PEX configuration address register */
	MV_REG_WRITE(PEX_CFG_ADDR_REG(pexIf), pexData);

	DB(mvOsPrintf("mvPexConfigRead:address pexData=%x ",pexData));
    
	
	/* In order to let the PEX controller absorbed the address of the read 	*/
	/* transaction we perform a validity check that the address was written */
	if(pexData != MV_REG_READ(PEX_CFG_ADDR_REG(pexIf)))
	{
		return MV_ERROR;
	}

	/* cleaning Master Abort */
	MV_REG_BIT_SET(PEX_CFG_DIRECT_ACCESS(pexIf,PEX_STATUS_AND_COMMAND), 
				   PXSAC_MABORT);
#if 0
	/* Guideline (GL# PCI Express-1) Erroneous Read Data on Configuration   */
	/* This guideline is relevant for all devices except of the following devices:
	   88F5281-BO and above, 88F5181L-A0 and above, 88F1281 A0 and above
	   88F6183 A0 and above, 88F6183L  */
	if ( ( (dev != localDev) || (bus != localBus) ) && 
		(
		!(MV_5281_DEV_ID == mvCtrlModelGet())&&
		!((MV_5181_DEV_ID == mvCtrlModelGet())&& (mvCtrlRevGet() >= MV_5181L_A0_REV))&&
		!(MV_1281_DEV_ID == mvCtrlModelGet())&&
		!(MV_6183_DEV_ID == mvCtrlModelGet())&&
		!(MV_6183L_DEV_ID == mvCtrlModelGet())&&
		!(MV_6281_DEV_ID == mvCtrlModelGet())&&
		!(MV_6192_DEV_ID == mvCtrlModelGet())&&
		!(MV_6190_DEV_ID == mvCtrlModelGet())&&
        !(MV_6180_DEV_ID == mvCtrlModelGet())&& 
		!(MV_78XX0_DEV_ID == mvCtrlModelGet()) 
		))
	{

		/* PCI-Express configuration read work-around */

		/* we will use one of the Punit (AHBToMbus) windows to access the xbar 
		and read the data from there */
		/*
		Need to configure the 2 free Punit (AHB to MBus bridge) 
		address decoding windows:
		Configure the flash Window to handle Configuration space requests 
		for PEX0/1:
		1.    write 0x7931/0x7941 to the flash window and the size, 
		      79-xbar attr (pci cfg), 3/4-xbar target (pex0/1), 1-WinEn
		2.    write base to flash window 
		
		Configuration transactions from the CPU should write/read the data 
		to/from address of the form:
		addr[31:28] = 0x5 (for PEX0) or 0x6 (for PEX1)
		addr[27:24] = extended register number
		addr[23:16] = bus number
		addr[15:11] = device number
		addr[10:8]   = function number
		addr[7:0]     = register number
		*/

		#include "ctrlEnv/sys/mvAhbToMbus.h"
		{
			MV_U32 winNum;
			MV_AHB_TO_MBUS_DEC_WIN originWin;
			MV_U32 pciAddr=0;
			MV_U32 remapLow=0,remapHigh=0;

			/* 
			We will use DEV_CS2\Flash window for this workarround 
			*/
            
			winNum = mvAhbToMbusWinTargetGet(PEX_CONFIG_RW_WA_TARGET);

			/* save remap values if exist */
			if ((1 == winNum)||(0 == winNum))
			{
				remapLow = MV_REG_READ(AHB_TO_MBUS_WIN_REMAP_LOW_REG(winNum));
				remapHigh = MV_REG_READ(AHB_TO_MBUS_WIN_REMAP_HIGH_REG(winNum));

			}
			

			/* save the original window values */
			mvAhbToMbusWinGet(winNum,&originWin);

			if (PEX_CONFIG_RW_WA_USE_ORIGINAL_WIN_VALUES)
			{
				/* set the window as xbar window */
				if (pexIf)
				{
					MV_REG_WRITE(AHB_TO_MBUS_WIN_CTRL_REG(winNum), 
					(0x7931 | (((originWin.addrWin.size >> 16)-1) ) << 16));
				}
				else
				{
					MV_REG_WRITE(AHB_TO_MBUS_WIN_CTRL_REG(winNum), 
					(0x7941 | (((originWin.addrWin.size >> 16)-1) ) << 16));
				}

				MV_REG_WRITE(AHB_TO_MBUS_WIN_BASE_REG(winNum),
							 originWin.addrWin.baseLow);

				/*pciAddr = originWin.addrWin.baseLow;*/
				pciAddr = (MV_U32)CPU_MEMIO_UNCACHED_ADDR(
					(MV_U32)originWin.addrWin.baseLow);
			
			}
			else
			{
				/* set the window as xbar window */
				if (pexIf)
				{
					MV_REG_WRITE(AHB_TO_MBUS_WIN_CTRL_REG(winNum), 
					(0x7931 | (((PEX_CONFIG_RW_WA_SIZE >> 16)-1) ) << 16));
				}
				else
				{
					MV_REG_WRITE(AHB_TO_MBUS_WIN_CTRL_REG(winNum), 
					(0x7941 | (((PEX_CONFIG_RW_WA_SIZE >> 16)-1) ) << 16));
				}

				MV_REG_WRITE(AHB_TO_MBUS_WIN_BASE_REG(winNum),
							 PEX_CONFIG_RW_WA_BASE);

				pciAddr = (MV_U32)CPU_MEMIO_UNCACHED_ADDR(PEX_CONFIG_RW_WA_BASE);
			}
			
			
			/* remap should be as base */
			if ((1 == winNum)||(0 == winNum))
			{
			   MV_REG_WRITE(AHB_TO_MBUS_WIN_REMAP_LOW_REG(winNum),pciAddr);
			   MV_REG_WRITE(AHB_TO_MBUS_WIN_REMAP_HIGH_REG(winNum),0);

			}

			/* extended register space */
			pciAddr |= (bus << 16);
			pciAddr |= (dev << 11);
			pciAddr |= (func << 8);
			pciAddr |= (regOff & PXCAR_REG_NUM_MASK); /* lgacy register space */

			pexData = *(MV_U32*)pciAddr; 
			pexData = MV_32BIT_LE(pexData); /* Data always in LE */

			/* restore the original window values */
			mvAhbToMbusWinSet(winNum,&originWin);

			/* restore original remap values*/
			if ((1 == winNum)||(0 == winNum))
			{
			   MV_REG_WRITE(AHB_TO_MBUS_WIN_REMAP_LOW_REG(winNum),remapLow);
			   MV_REG_WRITE(AHB_TO_MBUS_WIN_REMAP_HIGH_REG(winNum),remapHigh);

			}
		}
	}
	else
#endif
	{
		/* Read the Data returned in the PEX Data register */
		pexData = MV_REG_READ(PEX_CFG_DATA_REG(pexIf));

	}

	DB(mvOsPrintf("mvPexConfigRead: got : %x \n",pexData));
	
	return pexData;

}

/*******************************************************************************
* mvPexConfigWrite - Write to configuration space
*
* DESCRIPTION:
*       This function performs a 32 bit write to PEX configuration space.
*       It supports both type 0 and type 1 of Configuration Transactions 
*       (local and over bridge). In order to write to local bus segment, use 
*       bus number retrieved from mvPexLocalBusNumGet(). Other bus numbers 
*       will result configuration transaction of type 1 (over bridge).
*
* INPUT:
*       pexIf   - PEX interface number.
*       bus     - PEX segment bus number.
*       dev     - PEX device number.
*       func    - Function number.
*       regOffs - Register offset.       
*       data    - 32bit data.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_BAD_PARAM for bad parameters ,MV_ERROR on error ! otherwise MV_OK
*
*******************************************************************************/
MV_STATUS mvPexConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev, 
                           MV_U32 func, MV_U32 regOff, MV_U32 data)
{
#if defined(PCIE_VIRTUAL_BRIDGE_SUPPORT)
        return mvPexVrtBrgConfigWrite (pexIf, bus, dev, func, regOff, data);
}

MV_STATUS mvPexHwConfigWrite(MV_U32 pexIf, MV_U32 bus, MV_U32 dev,
                           MV_U32 func, MV_U32 regOff, MV_U32 data)
{
#endif
	MV_U32 pexData = 0;
	MV_U32	localDev,localBus;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf)
	{
		if (pexIf >= mvCtrlPexMaxIfGet())
		{
			mvOsPrintf("mvPexConfigWrite: ERR. Invalid PEX interface %d\n", 
																		pexIf);
			return MV_ERROR;
		}
	}

	if (dev >= MAX_PEX_DEVICES)
	{
		mvOsPrintf("mvPexConfigWrite: ERR. device number illigal %d\n",dev);
		return MV_BAD_PARAM;
	}

	if (func >= MAX_PEX_FUNCS)
	{
		mvOsPrintf("mvPexConfigWrite: ERR. function number illigal %d\n", func);
		return MV_ERROR;
	}

	if (bus >= MAX_PEX_BUSSES)
	{
		mvOsPrintf("mvPexConfigWrite: ERR. bus number illigal %d\n", bus);
		return MV_ERROR;
	}



	localDev = mvPexLocalDevNumGet(pexIf);
	localBus = mvPexLocalBusNumGet(pexIf);

	
	/* in PCI Express we have only one device number other than ourselves*/
	/* and this number is the first number we encounter 
		else than the localDev that can be any valid dev number*/
	/* pex spec define return on config read/write on any device */
	if (bus == localBus)
	{

		if (localDev == 0)
		{
			/* if local dev is 0 then the first number we encounter 
			after 0 is 1 */
			if ((dev != 1)&&(dev != localDev))
			{
				return MV_ERROR;
			}
	
		}
		else
		{
			/* if local dev is not 0 then the first number we encounter 
			is 0 */
	
			if ((dev != 0)&&(dev != localDev))
			{
				return MV_ERROR;
			}
		}

		
	}

	/* if we are not accessing ourselves , then check the link */
	if ((dev != localDev) || (bus != localBus) )
	{
		/* workarround */
		/* when no link return MV_ERROR */

		pexData = MV_REG_READ(PEX_STATUS_REG(pexIf));

		if ((pexData & PXSR_DL_DOWN))
		{
			return MV_ERROR;
		}

	}

	pexData =0;

	/* Creating PEX address to be passed */
	pexData |= (bus << PXCAR_BUS_NUM_OFFS);
	pexData |= (dev << PXCAR_DEVICE_NUM_OFFS);
	pexData |= (func << PXCAR_FUNC_NUM_OFFS);
	pexData |= (regOff & PXCAR_REG_NUM_MASK); /* lgacy register space */
	/* extended register space */
	pexData |=(((regOff & PXCAR_REAL_EXT_REG_NUM_MASK) >> 
				PXCAR_REAL_EXT_REG_NUM_OFFS) << PXCAR_EXT_REG_NUM_OFFS);
	pexData |= PXCAR_CONFIG_EN; 
	
	DB(mvOsPrintf("mvPexConfigWrite: If=%x bus=%x func=%x dev=%x regOff=%x data=%x \n",
		   pexIf,bus,func,dev,regOff,data,pexData) ); 

	/* Write the address to the PEX configuration address register */
	MV_REG_WRITE(PEX_CFG_ADDR_REG(pexIf), pexData);

	/* Clear CPU pipe. Important where CPU can perform OOO execution */
    	CPU_PIPE_FLUSH;

	/* In order to let the PEX controller absorbed the address of the read 	*/
	/* transaction we perform a validity check that the address was written */
	if(pexData != MV_REG_READ(PEX_CFG_ADDR_REG(pexIf)))
	{
		return MV_ERROR;
	}

	/* Write the Data passed to the PEX Data register */
	MV_REG_WRITE(PEX_CFG_DATA_REG(pexIf), data);

	return MV_OK;

}

/*******************************************************************************
* mvPexMasterEnable - Enable/disale PEX interface master transactions.
*
* DESCRIPTION:
*       This function performs read modified write to PEX command status 
*       (offset 0x4) to set/reset bit 2. After this bit is set, the PEX 
*       master is allowed to gain ownership on the bus, otherwise it is 
*       incapable to do so.
*
* INPUT:
*       pexIf  - PEX interface number.
*       enable - Enable/disable parameter.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_BAD_PARAM for bad parameters ,MV_ERROR on error ! otherwise MV_OK
*
*******************************************************************************/
MV_STATUS mvPexMasterEnable(MV_U32 pexIf, MV_BOOL enable)
{
	MV_U32 pexCommandStatus;
	MV_U32 localBus;
	MV_U32 localDev;

	/* Parameter checking   */
	if (pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexMasterEnable: ERR. Invalid PEX interface %d\n", pexIf);
		return MV_ERROR;
	}

	localBus = mvPexLocalBusNumGet(pexIf);
	localDev = mvPexLocalDevNumGet(pexIf);
	
	pexCommandStatus = MV_REG_READ(PEX_CFG_DIRECT_ACCESS(pexIf,
							    PEX_STATUS_AND_COMMAND));


	if (MV_TRUE == enable)
	{
		pexCommandStatus |= PXSAC_MASTER_EN;
	}
	else
	{
		pexCommandStatus &= ~PXSAC_MASTER_EN;
	}

	
	MV_REG_WRITE(PEX_CFG_DIRECT_ACCESS(pexIf,PEX_STATUS_AND_COMMAND),
				 pexCommandStatus);

	return MV_OK;
}


/*******************************************************************************
* mvPexSlaveEnable - Enable/disale PEX interface slave transactions.
*
* DESCRIPTION:
*       This function performs read modified write to PEX command status 
*       (offset 0x4) to set/reset bit 0 and 1. After those bits are set, 
*       the PEX slave is allowed to respond to PEX IO space access (bit 0) 
*       and PEX memory space access (bit 1). 
*
* INPUT:
*       pexIf  - PEX interface number.
*       dev     - PEX device number.
*       enable - Enable/disable parameter.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_BAD_PARAM for bad parameters ,MV_ERROR on error ! otherwise MV_OK
*
*******************************************************************************/
MV_STATUS mvPexSlaveEnable(MV_U32 pexIf, MV_U32 bus,MV_U32 dev, MV_BOOL enable)
{
	MV_U32 pexCommandStatus;
	MV_U32 RegOffs;

	/* Parameter checking   */
	if (pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexSlaveEnable: ERR. Invalid PEX interface %d\n", pexIf);
		return MV_BAD_PARAM;
	}
	if (dev >= MAX_PEX_DEVICES)
	{
		mvOsPrintf("mvPexLocalDevNumSet: ERR. device number illigal %d\n", dev);
		return MV_BAD_PARAM;

	}

	
	RegOffs = PEX_STATUS_AND_COMMAND;
	
	pexCommandStatus = mvPexConfigRead(pexIf, bus, dev, 0, RegOffs);

    if (MV_TRUE == enable)
	{
		pexCommandStatus |= (PXSAC_IO_EN | PXSAC_MEM_EN);
	}
	else                             
	{
		pexCommandStatus &= ~(PXSAC_IO_EN | PXSAC_MEM_EN);
	}

	mvPexConfigWrite(pexIf, bus, dev, 0, RegOffs, pexCommandStatus);

	return MV_OK;

}

/*******************************************************************************
* mvPexLocalBusNumSet - Set PEX interface local bus number.
*
* DESCRIPTION:
*       This function sets given PEX interface its local bus number.
*       Note: In case the PEX interface is PEX-X, the information is read-only.
*
* INPUT:
*       pexIf  - PEX interface number.
*       busNum - Bus number.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_NOT_ALLOWED in case PEX interface is PEX-X. 
*		MV_BAD_PARAM on bad parameters ,
*       otherwise MV_OK
*
*******************************************************************************/
MV_STATUS mvPexLocalBusNumSet(MV_U32 pexIf, MV_U32 busNum)
{
	MV_U32 pexStatus;
	MV_U32 localBus;
	MV_U32 localDev;


	/* Parameter checking   */
	if (pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexLocalBusNumSet: ERR. Invalid PEX interface %d\n",pexIf);
		return MV_BAD_PARAM;
	}
	if (busNum >= MAX_PEX_BUSSES)
	{
		mvOsPrintf("mvPexLocalBusNumSet: ERR. bus number illigal %d\n", busNum);
		return MV_ERROR;

	}

	localBus = mvPexLocalBusNumGet(pexIf);
	localDev = mvPexLocalDevNumGet(pexIf);



	pexStatus  = MV_REG_READ(PEX_STATUS_REG(pexIf));

	pexStatus &= ~PXSR_PEX_BUS_NUM_MASK;

	pexStatus |= (busNum << PXSR_PEX_BUS_NUM_OFFS) & PXSR_PEX_BUS_NUM_MASK;

	MV_REG_WRITE(PEX_STATUS_REG(pexIf), pexStatus);


	return MV_OK;
}


/*******************************************************************************
* mvPexLocalBusNumGet - Get PEX interface local bus number.
*
* DESCRIPTION:
*       This function gets the local bus number of a given PEX interface.
*
* INPUT:
*       pexIf  - PEX interface number.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Local bus number.0xffffffff on Error
*
*******************************************************************************/
MV_U32 mvPexLocalBusNumGet(MV_U32 pexIf)
{
	MV_U32 pexStatus;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf)
	{
		if (pexIf >= mvCtrlPexMaxIfGet())
		{
			mvOsPrintf("mvPexLocalBusNumGet: ERR. Invalid PEX interface %d\n",pexIf);
			return 0xFFFFFFFF;
		}
	}


	pexStatus  = MV_REG_READ(PEX_STATUS_REG(pexIf));

	pexStatus &= PXSR_PEX_BUS_NUM_MASK;

	return (pexStatus >> PXSR_PEX_BUS_NUM_OFFS);

}


/*******************************************************************************
* mvPexLocalDevNumSet - Set PEX interface local device number.
*
* DESCRIPTION:
*       This function sets given PEX interface its local device number.
*       Note: In case the PEX interface is PEX-X, the information is read-only.
*
* INPUT:
*       pexIf  - PEX interface number.
*       devNum - Device number.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_NOT_ALLOWED in case PEX interface is PEX-X. 
*		MV_BAD_PARAM on bad parameters ,
*       otherwise MV_OK
*
*******************************************************************************/
MV_STATUS mvPexLocalDevNumSet(MV_U32 pexIf, MV_U32 devNum)
{
	MV_U32 pexStatus;
	MV_U32 localBus;
	MV_U32 localDev;

	/* Parameter checking   */
	if (pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexLocalDevNumSet: ERR. Invalid PEX interface %d\n",pexIf);
		return MV_BAD_PARAM;
	}
	if (devNum >= MAX_PEX_DEVICES)
	{
		mvOsPrintf("mvPexLocalDevNumSet: ERR. device number illigal %d\n", 
																	   devNum);
		return MV_BAD_PARAM;

	}
	
	localBus = mvPexLocalBusNumGet(pexIf);
	localDev = mvPexLocalDevNumGet(pexIf);


	pexStatus  = MV_REG_READ(PEX_STATUS_REG(pexIf));

	pexStatus &= ~PXSR_PEX_DEV_NUM_MASK;

	pexStatus |= (devNum << PXSR_PEX_DEV_NUM_OFFS) & PXSR_PEX_DEV_NUM_MASK;

	MV_REG_WRITE(PEX_STATUS_REG(pexIf), pexStatus);


	return MV_OK;
}

/*******************************************************************************
* mvPexLocalDevNumGet - Get PEX interface local device number.
*
* DESCRIPTION:
*       This function gets the local device number of a given PEX interface.
*
* INPUT:
*       pexIf  - PEX interface number.
*
* OUTPUT:
*       None.
*
* RETURN:
*       Local device number. 0xffffffff on Error
*
*******************************************************************************/
MV_U32 mvPexLocalDevNumGet(MV_U32 pexIf)
{
	MV_U32 pexStatus;

	/* Parameter checking   */
	
	if (PEX_DEFAULT_IF != pexIf)
	{
		if (pexIf >= mvCtrlPexMaxIfGet())
		{
			mvOsPrintf("mvPexLocalDevNumGet: ERR. Invalid PEX interface %d\n", 
																   		pexIf);
			return 0xFFFFFFFF;
		}
	}
	
	pexStatus  = MV_REG_READ(PEX_STATUS_REG(pexIf));

	pexStatus &= PXSR_PEX_DEV_NUM_MASK;

	return (pexStatus >> PXSR_PEX_DEV_NUM_OFFS);
}

MV_VOID mvPexPhyRegRead(MV_U32 pexIf, MV_U32 regOffset, MV_U16 *value)
{

	MV_U32 regAddr;
	if (pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexPhyRegRead: ERR. Invalid PEX interface %d\n", pexIf);
		return;
	}
	regAddr = (BIT31 | ((regOffset & 0x3fff) << 16));
	MV_REG_WRITE(PEX_PHY_ACCESS_REG(pexIf), regAddr);
	*value = MV_REG_READ(PEX_PHY_ACCESS_REG(pexIf)); 
}


MV_VOID mvPexPhyRegWrite(MV_U32 pexIf, MV_U32 regOffset, MV_U16 value)
{

	MV_U32 regAddr;
	if(pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexPhyRegWrite: ERR. Invalid PEX interface %d\n", pexIf);
		return;
	}
	regAddr = (((regOffset & 0x3fff) << 16) | value);
	MV_REG_WRITE(PEX_PHY_ACCESS_REG(pexIf), regAddr);
}

/*******************************************************************************
* mvPexActiveStateLinkPMEnable
*
* DESCRIPTION:
*       Enable Active Link State Power Management
*
* INPUT:
*       pexIf   - PEX interface number.
*	enable	- MV_TRUE to enable ASPM, MV_FALSE to disable.
*
* OUTPUT:
*       None
*
* RETURN:
*       MV_OK on success , MV_ERROR otherwise
*
*******************************************************************************/
MV_STATUS mvPexActiveStateLinkPMEnable(MV_U32 pexIf, MV_BOOL enable)
{
	MV_U32 reg;

	if(pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexActiveStateLinkPMEnable: ERR. Invalid PEX interface %d\n", pexIf);
		return MV_ERROR;
	}

	reg = MV_REG_READ(PEX_PWR_MNG_EXT_REG(pexIf)) & ~PXPMER_L1_ASPM_EN_MASK;
	if(enable == MV_TRUE)
		reg |= PXPMER_L1_ASPM_EN_MASK;
	MV_REG_WRITE(PEX_PWR_MNG_EXT_REG(pexIf), reg);

	/* Enable / Disable L0/1 entry */ 
	reg = MV_REG_READ(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_LINK_CTRL_STAT_REG))
			& ~PXLCSR_ASPM_CNT_MASK;
	if(enable == MV_TRUE)
		reg |= PXLCSR_ASPM_CNT_L0S_L1S_ENT_SUPP;
	MV_REG_WRITE(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_LINK_CTRL_STAT_REG), reg);

	return MV_OK;
}


/*******************************************************************************
* mvPexForceX1
*
* DESCRIPTION:
*       shut down lanes 1-3 if recognize that attached to an x1 end-point
* INPUT:
*       pexIf   - PEX interface number.
*
* OUTPUT:
*       None
*
* RETURN:
*       MV_OK on success , MV_ERROR otherwise
*
*******************************************************************************/
MV_U32 mvPexForceX1(MV_U32 pexIf)
{
	MV_U32 regData = 0;
	if(pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexForceX1: ERR. Invalid PEX interface %d\n", pexIf);
		return MV_BAD_PARAM;
	}

	regData  = MV_REG_READ(PEX_CTRL_REG(pexIf)) & ~(PXCR_CONF_LINK_MASK) ;
	regData |= PXCR_CONF_LINK_X1;

	MV_REG_WRITE(PEX_CTRL_REG(pexIf), regData);
	return MV_OK;
}

MV_BOOL mvPexIsPowerUp(MV_U32 pexIf)
{
	if(pexIf >= mvCtrlPexMaxIfGet())
	{
		mvOsPrintf("mvPexIsPowerUp: ERR. Invalid PEX interface %d\n", pexIf);
		return MV_FALSE;
	}
	return mvCtrlPwrClckGet(PEX_UNIT_ID, pexIf);	
}


MV_VOID mvPexPowerDown(MV_U32 pexIf)
{
	if ( (mvCtrlModelGet() == MV_78XX0_DEV_ID) ||
		(mvCtrlModelGet() == MV_76100_DEV_ID) ||
		(mvCtrlModelGet() == MV_78100_DEV_ID) ||
		(mvCtrlModelGet() == MV_78200_DEV_ID) )
	{
		mvCtrlPwrClckSet(PEX_UNIT_ID, pexIf, MV_FALSE);	
	}
	else
	{
		MV_REG_WRITE((0x41B00 -(pexIf)*0x10000), 0x20800087);
	}
}