board/mv_ebu/common/mv_hal/pex/mvPex.c

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

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "ctrlEnv/sys/mvCpuIf.h"
#include "mvSysPexConfig.h"
#include "mvPexRegs.h"
/* #include "pci-if/mvPciIf.h" */
#include "mvPex.h"

/* #define MV_DEBUG */
/* defines  */
#ifdef MV_DEBUG
#define DB(x)	x
#else
#define DB(x)
#endif
#define MV_PEX_IS_VALID(x)	(pexHalData[x].virtualIf >= pexHalData[x].maxPexIf)

static MV_PEX_HAL_DATA pexHalData[MV_PEX_MAX_IF];

MV_STATUS mvPexInit(MV_U32 pexIf, MV_PEX_TYPE pexType, MV_PEX_HAL_DATA *halData)
{
	MV_PEX_MODE pexMode;
	MV_U32 regVal;
	MV_U32 status;

	mvOsMemcpy(&pexHalData[pexIf], halData, sizeof(MV_PEX_HAL_DATA));

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

	if (pexMode.pexLinkUp == MV_FALSE) {
		/*  interface detected no Link. */
		return MV_NO_SUCH;
	}

	/* Check that required PEX type is the one set in reset time */
	if (pexType != pexMode.pexType) {
		/* No Link. Shut down the Phy */
		mvPexPhyPowerDown(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);
	} else {
			regVal = MV_REG_READ(PEX_DBG_CTRL_REG(pexIf));
			regVal &= ~(BIT16 | BIT19);
			MV_REG_WRITE(PEX_DBG_CTRL_REG(pexIf), regVal);

	}

	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;

	if (pexIf >= MV_PEX_MAX_IF)
		return MV_BAD_PARAM;


	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) { */

	if ((MV_REG_READ(PEX_DBG_STATUS_REG(pexIf)) & 0x7f) != 0x7E) {

		pexMode->pexLinkUp = MV_FALSE;

		/* If there is no link, the auto negotiation data is worthless */
		pexMode->pexWidth = MV_PEX_WITDH_INVALID;
	}
	else { /* We have Link negotiation started */
			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);
		pexMode->pexGen = ((pexData & PXLCSR_NEG_LNK_GEN_MASK) >> PXLCSR_NEG_LNK_GEN_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)
{
	MV_U32 pexData = 0;
	MV_U32 localDev, localBus;

	if (pexIf >= MV_PEX_MAX_IF)
		return 0xFFFFFFFF;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf) {
		if (MV_PEX_IS_VALID(pexIf)) {
			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 0xFFFFFFFF;
	}

	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 0xFFFFFFFF;
	}

	/* 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 0xFFFFFFFF;
		} else {
			/* if local dev is not 0 then the first number we encounter
			   is 0 */

			if ((dev != 0) && (dev != localDev))
				return 0xFFFFFFFF;
		}
	}
	/* 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);
		/* 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)
{
	MV_U32 pexData = 0;
	MV_U32 localDev, localBus;

	if (pexIf >= MV_PEX_MAX_IF)
		return MV_BAD_PARAM;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf) {
		if (MV_PEX_IS_VALID(pexIf)) {
			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;

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

	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 (MV_PEX_IS_VALID(pexIf)) {
		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;

	/* Parameter checking   */
	if (MV_PEX_IS_VALID(pexIf)) {
		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;
	}

	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;

	if (pexIf >= MV_PEX_MAX_IF)
		return 0xFFFFFFFF;

	/* Parameter checking   */
	if (PEX_DEFAULT_IF != pexIf) {
		if (MV_PEX_IS_VALID(pexIf)) {
			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;

	if (pexIf >= MV_PEX_MAX_IF)
		return MV_BAD_PARAM;

	/* Parameter checking   */
	if (MV_PEX_IS_VALID(pexIf)) {
		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;
	}

	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 (MV_PEX_IS_VALID(pexIf)) {
			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 (MV_PEX_IS_VALID(pexIf)) {
		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 (MV_PEX_IS_VALID(pexIf)) {
		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 (MV_PEX_IS_VALID(pexIf)) {
		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 (MV_PEX_IS_VALID(pexIf)) {
		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;
}

/*******************************************************************************
* mvPexIfEnable
*
* DESCRIPTION:
*	This function Enables PCI Express interface.
*
* INPUT:
*	pexIf		-  PEX interface number.
*	pexType		-  MV_PEX_ROOT_COMPLEX - root complex device
*			   MV_PEX_END_POINT - end point device
* OUTPUT:
*	None.
*
* RETURN:
*	None.
*
*******************************************************************************/
MV_VOID mvPexIfEnable(MV_U32 pexIf, MV_PEX_TYPE pexType)
{
	MV_U32 regVal;

/* NOTE: this was asked by CV, bit is reserved in the spec, but causing problems, disabling for now. */
	/* MV_REG_BIT_SET(PEX_CTRL_REG(pexIf), PXCR_AUTO_SPEED_CTRL_MASK); */

	/* Set pex mode incase S@R not exist */
	if (pexType == MV_PEX_END_POINT) {
		MV_REG_BIT_RESET(PEX_CTRL_REG(pexIf), PXCR_DEV_TYPE_CTRL_MASK);
		/* Change pex mode in capability reg */
		MV_REG_BIT_RESET(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_CAPABILITY_REG), BIT22);
		MV_REG_BIT_SET(PEX_CFG_DIRECT_ACCESS(pexIf, PEX_CAPABILITY_REG), BIT20);

		regVal = MV_REG_READ(PEX_CAPABILITIES_REG(pexIf));
		regVal |= 0x00F00000;
		regVal &= ~(BIT23 | BIT22 | BIT21);
		MV_REG_WRITE(PEX_CAPABILITIES_REG(pexIf), regVal);
	} else {
		regVal = MV_REG_READ(PEX_CAPABILITIES_REG(pexIf));
		regVal |= 0x00F00000;
		regVal &= ~(BIT23 | BIT21 | BIT20);
		MV_REG_WRITE(PEX_CAPABILITIES_REG(pexIf), regVal);

		MV_REG_BIT_SET(PEX_CTRL_REG(pexIf), PXCR_DEV_TYPE_CTRL_MASK);
	}
	return;
}

MV_VOID mvPexPhyPowerDown(MV_U32 pexIf)
{
	MV_REG_WRITE(PEX_PHY_ACCESS_REG(pexIf), 0x20800087);
	return;
}