reactos/drivers/video/videoprt/timer.c

   1 /*
   2  * VideoPort driver
   3  *
   4  * Copyright (C) 2002, 2003, 2004 ReactOS Team
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with this library; see the file COPYING.LIB.
  18  * If not, write to the Free Software Foundation,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  *
  21  */
  22
  23 #include "videoprt.h"
  24
  25 /* PRIVATE FUNCTIONS **********************************************************/
  26
  27 VOID NTAPI
  28 IntVideoPortTimerRoutine(
  29    IN PDEVICE_OBJECT DeviceObject,
  30    IN PVOID ServiceContext)
  31 {
  32    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension = ServiceContext;
  33
  34    ASSERT(DeviceExtension->DriverExtension->InitializationData.HwTimer != NULL);
  35
  36    DeviceExtension->DriverExtension->InitializationData.HwTimer(
  37       &DeviceExtension->MiniPortDeviceExtension);
  38 }
  39
  40 BOOLEAN NTAPI
  41 IntVideoPortSetupTimer(
  42    IN PDEVICE_OBJECT DeviceObject,
  43    IN PVIDEO_PORT_DRIVER_EXTENSION DriverExtension)
  44 {
  45    NTSTATUS Status;
  46    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
  47
  48    DeviceExtension = (PVIDEO_PORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  49
  50    if (DriverExtension->InitializationData.HwTimer != NULL)
  51    {
  52       INFO_(VIDEOPRT, "Initializing timer\n");
  53
  54       Status = IoInitializeTimer(
  55          DeviceObject,
  56          IntVideoPortTimerRoutine,
  57          DeviceExtension);
  58
  59       if (!NT_SUCCESS(Status))
  60       {
  61          WARN_(VIDEOPRT, "IoInitializeTimer failed with status 0x%08x\n", Status);
  62          return FALSE;
  63       }
  64    }
  65
  66    return TRUE;
  67 }
  68
  69 /* PUBLIC FUNCTIONS ***********************************************************/
  70
  71 /*
  72  * @implemented
  73  */
  74
  75 VOID NTAPI
  76 VideoPortStartTimer(IN PVOID HwDeviceExtension)
  77 {
  78    TRACE_(VIDEOPRT, "VideoPortStartTimer\n");
  79    IoStartTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  80 }
  81
  82 /*
  83  * @implemented
  84  */
  85
  86 VOID NTAPI
  87 VideoPortStopTimer(IN PVOID HwDeviceExtension)
  88 {
  89    TRACE_(VIDEOPRT, "VideoPortStopTimer\n");
  90    IoStopTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  91 }