reactos/drivers/video/videoprt/interrupt.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 BOOLEAN NTAPI
  28 IntVideoPortInterruptRoutine(
  29    IN struct _KINTERRUPT *Interrupt,
  30    IN PVOID ServiceContext)
  31 {
  32    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension = ServiceContext;
  33
  34    ASSERT(DeviceExtension->DriverExtension->InitializationData.HwInterrupt != NULL);
  35
  36    return DeviceExtension->DriverExtension->InitializationData.HwInterrupt(
  37       &DeviceExtension->MiniPortDeviceExtension);
  38 }
  39
  40 BOOLEAN NTAPI
  41 IntVideoPortSetupInterrupt(
  42    IN PDEVICE_OBJECT DeviceObject,
  43    IN PVIDEO_PORT_DRIVER_EXTENSION DriverExtension,
  44    IN PVIDEO_PORT_CONFIG_INFO ConfigInfo)
  45 {
  46    NTSTATUS Status;
  47    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
  48
  49    DeviceExtension = (PVIDEO_PORT_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
  50
  51    /*
  52     * MSDN documentation for VIDEO_PORT_CONFIG_INFO states: "If a miniport driver's
  53     * HwVidFindAdapter function finds that the video adapter does not generate
  54     * interrupts or that it cannot determine a valid interrupt vector/level for
  55     * the adapter, HwVidFindAdapter should set both BusInterruptVector and
  56     * BusInterruptLevel to zero.
  57     */
  58
  59    if (DriverExtension->InitializationData.HwInterrupt != NULL &&
  60        ConfigInfo->BusInterruptLevel != 0 &&
  61        ConfigInfo->BusInterruptVector != 0)
  62    {
  63       ULONG InterruptVector;
  64       KIRQL Irql;
  65       KAFFINITY Affinity;
  66
  67       InterruptVector = HalGetInterruptVector(
  68          ConfigInfo->AdapterInterfaceType,
  69          ConfigInfo->SystemIoBusNumber,
  70          ConfigInfo->BusInterruptLevel,
  71          ConfigInfo->BusInterruptVector,
  72          &Irql,
  73          &Affinity);
  74
  75       if (InterruptVector == 0)
  76       {
  77          WARN_(VIDEOPRT, "HalGetInterruptVector failed\n");
  78          return FALSE;
  79       }
  80
  81       KeInitializeSpinLock(&DeviceExtension->InterruptSpinLock);
  82       Status = IoConnectInterrupt(
  83          &DeviceExtension->InterruptObject,
  84          IntVideoPortInterruptRoutine,
  85          DeviceExtension,
  86          &DeviceExtension->InterruptSpinLock,
  87          InterruptVector,
  88          Irql,
  89          Irql,
  90          ConfigInfo->InterruptMode,
  91          DeviceExtension->InterruptShared,
  92          Affinity,
  93          FALSE);
  94
  95       if (!NT_SUCCESS(Status))
  96       {
  97          WARN_(VIDEOPRT, "IoConnectInterrupt failed with status 0x%08x\n", Status);
  98          return FALSE;
  99       }
 100    }
 101
 102    return TRUE;
 103 }
 104
 105 /* PUBLIC FUNCTIONS ***********************************************************/
 106
 107 /*
 108  * @implemented
 109  */
 110
 111 VP_STATUS NTAPI
 112 VideoPortEnableInterrupt(IN PVOID HwDeviceExtension)
 113 {
 114    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
 115    BOOLEAN Status;
 116
 117    TRACE_(VIDEOPRT, "VideoPortEnableInterrupt\n");
 118
 119    DeviceExtension = VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension);
 120
 121    Status = HalEnableSystemInterrupt(
 122       DeviceExtension->InterruptVector,
 123       0,
 124       DeviceExtension->InterruptLevel);
 125
 126    return Status ? NO_ERROR : ERROR_INVALID_ACCESS;
 127 }
 128
 129 /*
 130  * @implemented
 131  */
 132
 133 VP_STATUS NTAPI
 134 VideoPortDisableInterrupt(IN PVOID HwDeviceExtension)
 135 {
 136    PVIDEO_PORT_DEVICE_EXTENSION DeviceExtension;
 137    BOOLEAN Status;
 138
 139    TRACE_(VIDEOPRT, "VideoPortDisableInterrupt\n");
 140
 141    DeviceExtension = VIDEO_PORT_GET_DEVICE_EXTENSION(HwDeviceExtension);
 142
 143    Status = HalDisableSystemInterrupt(
 144       DeviceExtension->InterruptVector,
 145       0);
 146
 147    return Status ? NO_ERROR : ERROR_INVALID_ACCESS;
 148 }