bspprp.cpp

mx27 f14v2 源代码。包括ADS板上诸多驱动的源码。

//
// Copyright (C) 2004-2006, Freescale Semiconductor, Inc. All Rights Reserved.
// THIS SOURCE CODE, AND ITS USE AND DISTRIBUTION, IS SUBJECT TO THE TERMS
// AND CONDITIONS OF THE APPLICABLE LICENSE AGREEMENT
//
//------------------------------------------------------------------------------
//
// File: bspprp.c
//
// Provides BSP-specific configuration routines for the pre-processing.
//
//------------------------------------------------------------------------------
#include "bsp.h"

//------------------------------------------------------------------------------
// External Functions

//------------------------------------------------------------------------------
// External Variables

//------------------------------------------------------------------------------
// Defines

//------------------------------------------------------------------------------
// Types

//------------------------------------------------------------------------------
// Global Variables

//------------------------------------------------------------------------------
// Local Variables
static PBSP_ARGS g_pDriverGlobal;

//------------------------------------------------------------------------------
// Local Functions

//------------------------------------------------------------------------------
//
// Function: BSPPrpAlloc
//
// This function is for BSP-specific allocation.
//
// Parameters:
//      None.
//
// Returns:
//      TRUE if successful; FALSE if failed.
//
//------------------------------------------------------------------------------
BOOL BSPPrpAlloc()
{
    PHYSICAL_ADDRESS phyAddr;
    
    phyAddr.QuadPart = IMAGE_SHARE_ARGS_RAM_PA_START;
    g_pDriverGlobal = (PBSP_ARGS)MmMapIoSpace(phyAddr, 
        sizeof(BSP_ARGS), FALSE);
    if (g_pDriverGlobal == NULL) {
        // Error messages will be printed in CSP
        return FALSE;
    }

    return TRUE;
}

//------------------------------------------------------------------------------
//
// Function: BSPPrpDealloc
//
// This function is for BSP-specific deallocation.
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPPrpDealloc()
{
    if (g_pDriverGlobal != NULL) {
        MmUnmapIoSpace(g_pDriverGlobal, sizeof(BSP_ARGS));
        g_pDriverGlobal =   NULL;
    }
}

//------------------------------------------------------------------------------
//
// Function: BSPPrpSetClockGatingMode
//
// This function enable or disable eMMA clock.
//
// Parameters:
//      bEnable
//          [in] Boolean indicates enable or disable.
//
// Returns:
//      TRUE if successful; FALSE if failed.
//
//------------------------------------------------------------------------------
BOOL BSPPrpSetClockGatingMode(BOOL bEnable)
{
    if (bEnable) 
    {
        if (g_pDriverGlobal->emma.usingStatus == 0) 
        {
            // Enable eMMA clock
            DDKClockSetGatingMode(DDK_CLOCK_GATE_INDEX_EMMA, 
                DDK_CLOCK_GATE_MODE_ENABLE);
            DDKClockSetGatingMode(DDK_CLOCK_GATE_INDEX_HCLK_EMMA, 
                DDK_CLOCK_GATE_MODE_ENABLE);
        }
        else
        {
            if (g_pDriverGlobal->emma.usingStatus & EMMA_PRP_USING_FLAG) 
            {
                // Probably already used by someone
                return FALSE;
            }
        }

        // Set PrP using status
        g_pDriverGlobal->emma.usingStatus |= EMMA_PRP_USING_FLAG;
    } 
    else
    {
        if ((g_pDriverGlobal->emma.usingStatus & (~EMMA_PRP_USING_FLAG)) == 0)
        {
            // Disable eMMA clock
            DDKClockSetGatingMode(DDK_CLOCK_GATE_INDEX_EMMA, 
                DDK_CLOCK_GATE_MODE_DISABLE);
            DDKClockSetGatingMode(DDK_CLOCK_GATE_INDEX_HCLK_EMMA, 
                DDK_CLOCK_GATE_MODE_DISABLE);
        }

        // Clear PrP using status
        g_pDriverGlobal->emma.usingStatus &= ~EMMA_PRP_USING_FLAG;
    }

    return TRUE;
}

//------------------------------------------------------------------------------
//
// Function: BSPSetPrpIntrThreadPriority
//
// This function sets the thread priority for the pre-processor.
//
// Parameters:
//      None.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void BSPSetPrpIntrThreadPriority()
{
    CeSetThreadPriority(GetCurrentThread(), 100);
    return;
}