//Unload entry for MOUSE driver.
static DWORD E1000Destroy(__COMMON_OBJECT *lpDriver,
__COMMON_OBJECT *lpDevice,
__DRCB *lpDrcb)
{
DisconnectInterrupt(g_hE1kIntHandler); //Release key board interrupt.
return 0;
}
//Unload entry for COM driver.
static DWORD COMDestroy(__COMMON_OBJECT* lpDriver,
__COMMON_OBJECT* lpDevice,
__DRCB* lpDrcb)
{
__COM_CONTROL_BLOCK* pCtrlBlock = (__COM_CONTROL_BLOCK*)((__DEVICE_OBJECT*)lpDevice)->lpDevExtension;
if(NULL == pCtrlBlock)
{
return 0;
}
//Disconnect interrupt.
DisconnectInterrupt((HANDLE)pCtrlBlock->hInterrupt);
//Destroy device object.
IOManager.DestroyDevice((__COMMON_OBJECT*)&IOManager,
(__DEVICE_OBJECT*)lpDevice);
return 0;
}
//Main entry point of COM driver.
BOOL COMDrvEntry(__DRIVER_OBJECT* lpDriverObject)
{
__DEVICE_OBJECT* pDevObject[COM_DEVICE_NUM];
BOOL bResult = FALSE;
int i,j;
//Initialize each COM interface device in ComCtrlBlock array.
for(i = 0;i < COM_DEVICE_NUM;i ++)
{
pDevObject[i] = IOManager.CreateDevice((__COMMON_OBJECT*)&IOManager,
ComCtrlBlock[i].pComName,
0,
1,
1024,
1024,
&ComCtrlBlock[i],
lpDriverObject);
if(NULL == pDevObject[i]) //Failed to create device object.
{
PrintLine("COM Driver: Failed to create device object for COM.");
goto __TERMINAL;
}
//Connect each COM interface's interrupt.
ComCtrlBlock[i].hInterrupt = ConnectInterrupt(
COMIntHandler,
(LPVOID)&ComCtrlBlock[i],
ComCtrlBlock[i].IntVector);
if(NULL == ComCtrlBlock[i].hInterrupt) //Can not connect interrupt.
{
PrintLine("COM Driver: Failed to connect interrupt for a COM device.");
goto __TERMINAL;
}
//Initialize the COM interface controller.
if(!InitializeCOM(ComCtrlBlock[i].wBasePort))
{
goto __TERMINAL;
}
}
//Asign call back functions of driver object.
lpDriverObject->DeviceDestroy = COMDestroy;
lpDriverObject->DeviceWrite = ComDeviceWrite;
lpDriverObject->DeviceRead = ComDeviceRead;
lpDriverObject->DeviceOpen = ComDeviceOpen;
lpDriverObject->DeviceClose = ComDeviceClose;
bResult = TRUE; //Indicate the whole process is successful.
__TERMINAL:
if(!bResult) //Should release all resource allocated above.
{
for(j = 0;j <= i;j ++)
{
if(pDevObject[j])
{
//Destroy the device object.
IOManager.DestroyDevice((__COMMON_OBJECT*)&IOManager,
pDevObject[j]);
}
if(ComCtrlBlock[j].hInterrupt)
{
//Disconnect interrupt.
DisconnectInterrupt((HANDLE)ComCtrlBlock[j].hInterrupt);
}
}
}
return bResult;
}