interrup.c

用C语言写得PCI8052的WDM结构驱动程序

//  Programmer：桂凯    西安电子科技大学
// 
//  email：[e-mail]
//  All right reserved 

//
//
//
//
#include <ntddk.h>
#include <ndis.h>
#include <pci9052hw.h>
#include <pci9052sw.h>

BOOLEAN HandleInterrupt(PKINTERRUPT Interupt, PVOID ServiceContext)
{
    BOOLEAN ourDeviceInterrupting = FALSE;
    PDEVICE_EXTENSION devExt = (PDEVICE_EXTENSION)ServiceContext;
    ULONG intRegister;
    ULONG csrRegister;
    PULONG port = (PULONG)devExt->PlxRegisterBaseAddr  + INTCSR;
    ULONG value[1] ;
//    WRITE_PORT_ULONG( &port, value);

//    DbgPrint("PCI9052: ISR entered\n");
/*  
    if(devExt->data_ready ==TRUE) // we have already fetch data from PCI9052 and the app didn't get it.
        return(ourDeviceInterrupting);
 */        
    memcpy( value, port, 4);
    
    if( value[0] & MY_INT_HAPPEN_MASK)
    { 
    	ourDeviceInterrupting = TRUE;  
    	value[0] = value[0] & (~MY_INT_DISABLE); // disable pci9052 inta 
    	value[0] = value[0] & (~MY_INT_CLR_STATUS); // clear status
    	value[0] = value[0] | (MY_INT_CLR_INT) ;  // clear Local edge triggerable interrupt
    	memcpy( port, value, 4);         // at this time, interupt is disabled
    	
        IoRequestDpc(devExt->DeviceObject, 0, NULL);
    }

    
    return(ourDeviceInterrupting);
}



VOID
DpcForIsr(PKDPC Dpc, PDEVICE_OBJECT DeviceObject, PIRP Unused, PVOID Context)
{
    PDEVICE_EXTENSION devExt = (PDEVICE_EXTENSION) DeviceObject->DeviceExtension;
    PLIST_ENTRY entry;
    PIRP irp;
    PVOID baseVa;
    ULONG mapRegsNeeded;
    ULONG offset = 0x00000001;
    PULONG port = (PULONG)devExt->PlxRegisterBaseAddr + INTCSR;
    ULONG value[1] ;
    ULONG X,Y;
       
    
    if( devExt->MapedIoLocalSpace0BaseAddr != NULL)
    {      
       memcpy( devExt->data, devExt->MapedIoLocalSpace0BaseAddr, 4); // save data to our pool
       X=*(devExt->data)>>16;
	 Y=*(devExt->data)&0XFFF;
	 DbgPrint("X: 0x%x,  Y: 0x %x \n",X,Y);
       devExt->data_ready = TRUE;
       
//       DbgPrint("------PCI9052 DPCforISR, int_counter = %08d \n",devExt->int_counter++ );
    }  
    
    memcpy( value,port, 4);
    value[0] = value[0] | (MY_INT_ENABLE);
    memcpy( port, value, 4); // enable interrupt again
    
    return;
}