pwmmdd.c

freescale i.mx31 BSP CE5.0全部源码

//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
//------------------------------------------------------------------------------
//
//  Copyright (C) 2004, Motorola Inc. All Rights Reserved
//
//------------------------------------------------------------------------------
//  Copyright (C) 2004, Freescale Semiconductor, Inc. All Rights Reserved
//  THIS SOURCE CODE IS CONFIDENTIAL AND PROPRIETARY AND MAY NOT
//  BE USED OR DISTRIBUTED WITHOUT THE WRITTEN PERMISSION OF
//  Freescale Semiconductor, Inc.
//
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
//
//  File:  pwmmdd.c
//
//  This module provides a stream interface for the PWM
//  driver.  Client drivers can use the stream interface to
//  configure the PWM driver and run test programs.
//
//------------------------------------------------------------------------------
#include <windows.h>
#include <Devload.h>
#include "mxarm11.h"
#include "pwmdefs.h"

//------------------------------------------------------------------------------
// External Functions
//------------------------------------------------------------------------------
extern BOOL BSPPwmSetClockGatingMode(BOOL startClocks);

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

//------------------------------------------------------------------------------
// Defines
//------------------------------------------------------------------------------
#define REG_DEVINDEX_VAL_NAME          TEXT("Index")

#define PWM_DEVICE_CONTEXT_HANDLE 0xCAFE

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


//------------------------------------------------------------------------------
// Global Variables
//------------------------------------------------------------------------------
#ifdef DEBUG
extern DBGPARAM dpCurSettings =
{
    _T("PWM"),
    {
        _T("Init"), _T("DeInit"), _T("Ioctl"), _T(""),
        _T(""), _T(""), _T(""), _T(""),
        _T(""),_T(""),_T(""),_T(""),
        _T("Info"),_T("Function"),_T("Warnings"),_T("Errors")
    },
    ZONEMASK_ERROR | ZONEMASK_WARN
};
#endif

//------------------------------------------------------------------------------
// Local Variables
//------------------------------------------------------------------------------
static CEDEVICE_POWER_STATE CurrentDx;

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


//------------------------------------------------------------------------------
//
// Function: PWM_Init
//
// The Device Manager calls this function as a result of a call to the
// ActivateDevice() function.
//
// Parameters:
//      pContext
//          [in] Pointer to a string containing the registry path to the
//          active key for the stream interface driver.
//
// Returns:
//      Returns a handle to the device context created if successful. Returns
//      zero if not successful.
//
//------------------------------------------------------------------------------
DWORD PWM_Init(LPCTSTR pContext)
{
    DEBUGMSG(ZONE_FUNCTION, (TEXT("++PWM_Init\r\n")));

    if (!PwmInitialize())
        return 0;
    CurrentDx = D4;

    DEBUGMSG(ZONE_FUNCTION, (TEXT("--PWM_Init\r\n")));
    return PWM_DEVICE_CONTEXT_HANDLE;
}


//------------------------------------------------------------------------------
//
// Function: PWM_Deinit
//
// This function uninitializes a device.
//
// Parameters:
//      hDeviceContext
//          [in] Handle to the device context.
//
// Returns:
//      TRUE indicates success. FALSE indicates failure.
//
//------------------------------------------------------------------------------
BOOL PWM_Deinit(DWORD hDeviceContext)
{
    DEBUGMSG(ZONE_FUNCTION, (TEXT("++PWM_Deinit\r\n")));

    PwmDeinit();

    DEBUGMSG(ZONE_FUNCTION, (TEXT("--PWM_Deinit\r\n")));

    return TRUE;
}


//------------------------------------------------------------------------------
//
// Function: PWM_Open
//
// This function opens a device for reading, writing, or both.
//
// Parameters:
//      hDeviceContext
//          [in] Handle to the device context. The XXX_Init function creates
//          and returns this handle.
//
//      AccessCode
//          [in] Access code for the device. The access is a combination of
//          read and write access from CreateFile.
//
//      ShareMode
//          [in] File share mode of the device. The share mode is a
//          combination of read and write access sharing from CreateFile.
//
// Returns:
//      This function returns a handle that identifies the open context of
//      the device to the calling application.
//
//------------------------------------------------------------------------------
DWORD PWM_Open(DWORD hDeviceContext, DWORD AccessCode, DWORD ShareMode)
{
    DWORD dwStatus;
    DEBUGMSG(ZONE_FUNCTION, (TEXT("++PWM_Open\r\n")));
    dwStatus = DevicePowerNotify(_T("PWM1:"), D0, POWER_NAME);
    if(dwStatus != ERROR_SUCCESS)
    {
        DEBUGMSG(ZONE_WARN, (_T("PWM1: DevicePowerNotify(D0) failed %d.\r\n"), dwStatus));
    }
    DEBUGMSG(ZONE_FUNCTION, (TEXT("--PWM_Open\r\n")));
    return PWM_DEVICE_CONTEXT_HANDLE;
}


//------------------------------------------------------------------------------
//
// Function: PWM_Close
//
// This function closes the PWM for reading and writing.
//
// Parameters:
//      hOpenContext
//          [in] Handle returned by the XXX_Open function, used to identify
//          the open context of the device.
//
// Returns:
//      TRUE indicates success. FALSE indicates failure.
//
//------------------------------------------------------------------------------
BOOL PWM_Close(DWORD hOpenContext)
{
   DWORD dwStatus;
   DEBUGMSG(ZONE_FUNCTION, (TEXT("++PWM_Close\r\n")));
   dwStatus = DevicePowerNotify(_T("PWM1:"), D4, POWER_NAME);
   if(dwStatus != ERROR_SUCCESS)
   {
       DEBUGMSG(ZONE_WARN, (_T("PWM1: DevicePowerNotify(D4) failed %d.\r\n"), dwStatus));
   }
   DEBUGMSG(ZONE_FUNCTION, (TEXT("--PWM_Close\r\n")));
   return TRUE;
}


//------------------------------------------------------------------------------
//
// Function: PWM_PowerDown
//
// This function suspends power to the device. It is useful only with
// devices that can power down under software control.
//
// Parameters:
//      hDeviceContext
//          [in] Handle to the device context.
//
// Returns:
//      None.
//
//------------------------------------------------------------------------------
void PWM_PowerDown(DWORD hDeviceContext)
{
   DEBUGMSG(ZONE_FUNCTION, (TEXT("++PWM_PowerDown\r\n")));
   
   DEBUGMSG(ZONE_FUNCTION, (TEXT("--PWM_PowerDown\r\n")));
}


//------------------------------------------------------------------------------
//
// Function: PWM_PowerUp