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  * $Id$
  22  */
  23
  24 #include "videoprt.h"
  25
  26 /* PRIVATE FUNCTIONS **********************************************************/
  27
  28 VOID NTAPI
  29 IntVideoPortTimerRoutine(
  30    IN PDEVICE_OBJECT DeviceObject,
  31    IN PVOID ServiceContext)
  32 {
  33    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension = ServiceContext;
  34
  35    ASSERT(DeviceExtension->DriverExtension->InitializationData.HwTimer != NULL);
  36
  37    DeviceExtension->DriverExtension->InitializationData.HwTimer(
  38       &DeviceExtension->MiniPortDeviceExtension);
  39 }
  40
  41 BOOLEAN NTAPI
  42 IntVideoPortSetupTimer(
  43    IN PDEVICE_OBJECT DeviceObject,
  44    IN PVIDEO_PORT_DRIVER_EXTENSION DriverExtension)
  45 {
  46    NTSTATUS Status;
  47    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
  48
  49    DeviceExtension = (PVIDEO_PORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  50
  51    if (DriverExtension->InitializationData.HwTimer != NULL)
  52    {
  53       DPRINT("Initializing timer\n");
  54
  55       Status = IoInitializeTimer(
  56          DeviceObject,
  57          IntVideoPortTimerRoutine,
  58          DeviceExtension);
  59
  60       if (!NT_SUCCESS(Status))
  61       {
  62          DPRINT("IoInitializeTimer failed with status 0x%08x\n", Status);
  63          return FALSE;
  64       }
  65    }
  66
  67    return TRUE;
  68 }
  69
  70 /* PUBLIC FUNCTIONS ***********************************************************/
  71
  72 /*
  73  * @implemented
  74  */
  75
  76 VOID NTAPI
  77 VideoPortStartTimer(IN PVOID HwDeviceExtension)
  78 {
  79    DPRINT("VideoPortStartTimer\n");
  80    IoStartTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  81 }
  82
  83 /*
  84  * @implemented
  85  */
  86
  87 VOID NTAPI
  88 VideoPortStopTimer(IN PVOID HwDeviceExtension)
  89 {
  90    DPRINT("VideoPortStopTimer\n");
  91    IoStopTimer(VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension)->FunctionalDeviceObject);
  92 }