pmic_linki2csoc.c

Drivers source code board cm-x300 with Marvell PXA3xx CPU

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this sample source code is subject to the terms of the Microsoft
// license agreement under which you licensed this sample source code. If
// you did not accept the terms of the license agreement, you are not
// authorized to use this sample source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the LICENSE.RTF on your install media or the root of your tools installation.
// THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES OR INDEMNITIES.
//
//
// (C) Copyright 2006 Marvell International Ltd.
// All Rights Reserved
//
/** FILENAME:  PMIC_LinkI2CSoc.c
**
** Contain the basic PMIC I2C opertation which will call I2C SOC Static Lib API functions
*****************************************************************************/

#include "Runtime_context.h"
#include "PI2C_SOC.h"
#include "PMIC_PLATFORM.h"

volatile UINT32 * g_pPMER = NULL;
volatile UINT32 * g_pPVCR = NULL;

PXA_STATUS_T PMICLIB_LockBus()
{
	//Performing the sequence described in Vol 1, chapter 6.8
	return PXA_STATUS_SUCCESS;
}

PXA_STATUS_T PMICLIB_UnLockBus()
{
	return PXA_STATUS_SUCCESS;
}



PXA_PI2CREG_T * PMICGetPI2CRegs()
{
    static PXA_PI2CREG_T *pPI2CReg = NULL;
    
    if (NULL == pPI2CReg)
    {
        pPI2CReg = (PXA_PI2CREG_T *)((UINT32)PXA_CTX_GetRegAddr(PXA_PERIPHERAL_REGIDX_SPMU)+ 0xC0);
    }
    
    return pPI2CReg;
}


/******************************************************************************
 * Function: PMICLIB_Write 
 * 
 * Description:
 * Input Parameters:
 *
 * Returns:
 *
 * Global effects:
 *
 * Assumptions:
 *
 * Calls:
 *
 * Called by:
 * 
 ******************************************************************************/
PXA_STATUS_T  PMICLIB_Write(UINT8 ucChipRegAddr, UINT8 ucValue)
{
    PXA_STATUS_T ulStatus = PXA_STATUS_SUCCESS;
    PXA_PI2CREG_T *pPI2CReg = NULL;

    UINT8  aucBuf[2];
    UINT32 ulBytesCount = 0;    
    BOOL bSendStop = TRUE;

    pPI2CReg = PMICGetPI2CRegs();

    if (!pPI2CReg)
    {
        ERRORMSG(1, (TEXT("[PMIC]: PMICLIB_Write Failed in PMICGetI2CRegs().\r\n")));    
        return PXA_STATUS_FUNCTION_ERROR;
    }

    aucBuf[0] = ucChipRegAddr;
    aucBuf[1] = ucValue;
    ulBytesCount = sizeof(aucBuf);

	PMICLIB_LockBus();
    ulStatus = PXA_PI2CWrite(pPI2CReg, PMIC_PI2C_SLAVE_ADDR, 
							aucBuf, 
							ulBytesCount, 
							bSendStop);
	PMICLIB_UnLockBus();

    if (PXA_STATUS_SUCCESS != ulStatus)
    {
        ERRORMSG(1, (TEXT("[PMIC]: PMICLIB_Write Failed in PXA_PI2CWrite (ulStatus = %d).\r\n"), ulStatus));                    
        return ulStatus;       
    }

    return PXA_STATUS_SUCCESS;
}

/******************************************************************************
 * Function: PMICLIB_Read 
 * 
 * Description:
 * Input Parameters:
 *
 * Returns:
 *
 * Global effects:
 *
 * Assumptions:
 *
 * Calls:
 *
 * Called by:
 * 
 ******************************************************************************/
PXA_STATUS_T  PMICLIB_Read(UINT8 ucChipRegAddr, UINT8 *pucValue)
{
    PXA_STATUS_T ulStatus = PXA_STATUS_SUCCESS;
    PXA_PI2CREG_T *pPI2CReg = NULL;

    BOOL bSendStop = TRUE;

    pPI2CReg = PMICGetPI2CRegs();

    if (!pPI2CReg)
    {
        ERRORMSG(1, (TEXT("[PMIC]: PMICLIB_Read Failed in PMICGetI2CRegs().\r\n")));    
        return PXA_STATUS_FUNCTION_ERROR;
    }

	PMICLIB_LockBus();
    ulStatus = PXA_PI2CWrite(pPI2CReg, PMIC_PI2C_SLAVE_ADDR, 
								&ucChipRegAddr, 
								sizeof(UINT8), 
								bSendStop);
	PMICLIB_UnLockBus();

    if (PXA_STATUS_SUCCESS != ulStatus)
    {
        ERRORMSG(1, (TEXT("[PMIC]: PMICLIB_Read Failed in PXA_PI2CWrite (ulStatus = %d).\r\n"), ulStatus));                    
        return ulStatus;       
    }

	PMICLIB_LockBus();
    ulStatus = PXA_PI2CRead(pPI2CReg, PMIC_PI2C_SLAVE_ADDR,
								pucValue, 
								sizeof(UINT8),
								bSendStop);
	PMICLIB_UnLockBus();

    if (PXA_STATUS_SUCCESS != ulStatus)
    {
        ERRORMSG(1, (TEXT("[PMIC]: PMICLIB_Read Failed in PXA_PI2CRead (ulStatus = %d).\r\n"), ulStatus));                    
        return ulStatus;       
    }

    return PXA_STATUS_SUCCESS;    
}