ul_wdpnp.c

linux下的RS485的驱动 值得一看

//
//  RETURNS:
//
//    STATUS_SUCCESS;
//
//  IRQL:
//
//
//  NOTES:
//
//
///////////////////////////////////////////////////////////////////////////////
NTSTATUS
StartDevice(IN PULAN_DEVICE_EXTENSION DevExt,
            IN PIO_STACK_LOCATION IoStackLocation)
{
    NTSTATUS code = STATUS_SUCCESS;
    ULONG index;
    PDEVICE_DESCRIPTION deviceDescription;
    PCM_RESOURCE_LIST pResourceList, pResourceListTranslated;
    PCM_PARTIAL_RESOURCE_LIST prl, prlTranslated;
    PCM_PARTIAL_RESOURCE_DESCRIPTOR prd, prdTranslated;
    PCM_FULL_RESOURCE_DESCRIPTOR frd, frdTranslated;
    HANDLE regKeyHandle;
    PWCHAR dpHWID;
    ULONG  dpHWID_len;
    PWCHAR pwc;
    pci_device_id_t *pci_device_id;
    usb_device_id_t *usb_device_id;
    int ChipOptions=0;
    ULONG uLanBaudrate=19200;
    ULONG uLanBaudBase=0;
    ULONG uLanMyAddress=2;

    pResourceList = IoStackLocation->Parameters.StartDevice.AllocatedResources;
    pResourceListTranslated = IoStackLocation->Parameters.StartDevice.AllocatedResourcesTranslated;

    //
    // Ensure the base address starts as NULL
    //
    ///DevExt->AmccBaseRegisterAddress = NULL;
    DevExt->port=0;
    DevExt->irq=0;


    // Try to find chip category from 
    // IoGetDeviceProperty(DeviceObject,DeviceProperty,BufferLength,PropertyBuffer,ResultLength);
    // subfunctions DevicePropertyHardwareID and DevicePropertyLegacyBusType 
    // uLan: HWID : PCI\VEN_1415&DEV_950A&SUBSYS_00001415&REV_00
    // uLan: HWID : PCI\VEN_1415&DEV_950A&SUBSYS_00001415
    // uLan: HWID : PCI\VEN_1415&DEV_950A&CC_070006
    // uLan: HWID : PCI\VEN_1415&DEV_950A&CC_0700

    dpHWID_len=0;
    code=IoGetDeviceProperty(DevExt->PhysicalDeviceObject,
			     DevicePropertyHardwareID,
			     0,NULL,&dpHWID_len);
    if(dpHWID_len){
      dpHWID=ExAllocatePool(PagedPool,dpHWID_len);
      if(dpHWID==NULL) return STATUS_INSUFFICIENT_RESOURCES;
      code=IoGetDeviceProperty(DevExt->PhysicalDeviceObject,
			       DevicePropertyHardwareID,
			       dpHWID_len,dpHWID,&dpHWID_len);
      if (!NT_SUCCESS(code))  {
       #if DBG
        uLan_DbgPrint("uLan: IoGetDeviceProperty failed with error 0x%x", code);
       #endif
        ExFreePool(dpHWID);
        return(code);
      }
      pwc=dpHWID;
      while(*pwc){
       #if DBG
        uLan_DbgPrint("uLan: HWID : %ws\n", pwc);
       #endif
        while(*pwc) pwc++;
	pwc++;
      }
      if(FindPciHWID(dpHWID,&pci_device_id)){             
	ChipOptions=pci_device_id->driver_data;
        #if DBG
          uLan_DbgPrint("uLan: ChipOptions %08X\n", ChipOptions);
        #endif
      }

      if (FindUsbHWID(dpHWID, &usb_device_id)) {
	ChipOptions=usb_device_id->driver_info;
        DevExt->usb_bus=1;
        #if DBG
          uLan_DbgPrint("uLan: ChipOptions %08X\n", ChipOptions);
        #endif

        //create usb device
        usb_create_dev(&((usb_device*)DevExt->dev),DevExt->DeviceToSendIrpsTo);
        if ( !NT_SUCCESS( code)) {
           uLan_DbgPrint("uLan: error in create device\n");
           return code;
        }

        //set configuration
        code = usb_set_configuration((usb_device*)DevExt->dev,1);
        if ( !NT_SUCCESS( code)) {
           uLan_DbgPrint("uLan: error in usb_set_configuration\n");
           return code;
        }  
         
        usb_show_device((usb_device*)DevExt->dev);
      }
      
      ExFreePool(dpHWID);
    }

    //
    // Read values from registry 
    //
    code = IoOpenDeviceRegistryKey(DevExt->PhysicalDeviceObject,
				   PLUGPLAY_REGKEY_DEVICE,
				   STANDARD_RIGHTS_WRITE,
				   &regKeyHandle);
    if(NT_SUCCESS(code)) {
      MyGetRegistryKeyValue (regKeyHandle,L"uLanBaudrate",
			     &uLanBaudrate,sizeof(uLanBaudrate));
      MyGetRegistryKeyValue (regKeyHandle,L"uLanBaudBase",
			     &uLanBaudBase,sizeof(uLanBaudBase));
      MyGetRegistryKeyValue (regKeyHandle,L"uLanMyAddress",
			     &uLanMyAddress,sizeof(uLanMyAddress));

      ZwClose (regKeyHandle);
    }
    
    
    if (!DevExt->usb_bus) {
        /* not for USB device, pResourceList is NULL */
        
        frd = &pResourceList->List[0];
        frdTranslated = &pResourceListTranslated->List[0];

        prl = &frd->PartialResourceList;
        prlTranslated = &frdTranslated->PartialResourceList;

#if DBG
        PrintResourceList(pResourceList);
        PrintResourceList(pResourceListTranslated);
#endif

        //
        // Walk through the partial resource descriptors to find the
        // hardware resources that have been allocated to us
        //
        // We need one range of port addresses (0x08 bytes long) and
        // and interrupt resource.
        //
        for (index = 0,
             prd = &prl->PartialDescriptors[index],
             prdTranslated = &prlTranslated->PartialDescriptors[index];
             index < prl->Count && NT_SUCCESS(code);
             index++, prd++, prdTranslated++) {

            switch (prd->Type) {

                case CmResourceTypePort:

                    //
                    // Newer AMCC Demo Boards have more than just one BAR
                    // programmed in the PCI configuration ROM.  We want
                    // the FIRST BAR, which is the base address of the
                    // device itself.  So, we ignore any ports reported to
                    // us after the first one.
                    //
                    ///if (DevExt->AmccBaseRegisterAddress) {
    	        if (DevExt->port) {
#if DBG
                        uLan_DbgPrint("uLan: Ignoring additional port resource ...\n");

                        if(prdTranslated->Type == CmResourceTypePort) {
                            uLan_DbgPrint("uLan: (Translated port 0x%0x)\n",
                             prdTranslated->u.Port.Start.LowPart);


                        } else {
                            uLan_DbgPrint("uLan: (Translated memory 0x%0x)\n",
                             prdTranslated->u.Memory.Start);
                        }

#endif
                        break;                    
                    }

#if DBG
                    uLan_DbgPrint("uLan: Configuring port resource ...\n");
#endif
                    //
                    // Should only get ONE port resources
                    //
                    ///ASSERT(DevExt->AmccBaseRegisterAddress == NULL);

                    //
                    // Our port space on this card is 0x40 bytes longs
                    //
                    ///ASSERT(prd->u.Memory.Length == 0x40);

                    //
                    // Do the device ports appear in port I/O space or
                    // in memory space on this machine.
                    //
                    if(prdTranslated->Type == CmResourceTypePort) {

                        //
                        // The port is in port space on this machine.  Just
                        // store away the address
                        //
                        ///DevExt->MappedPorts = FALSE;

                        ///DevExt->AmccBaseRegisterAddress =
                        ///    (PVOID) prdTranslated->u.Port.Start.LowPart;
    		    DevExt->port = prdTranslated->u.Port.Start.LowPart;

#if DBG
                        uLan_DbgPrint("uLan: Translated resource is a port at 0x%0x\n",
                                    DevExt->port);
#endif

                    } else {


                        ASSERT(prdTranslated->Type == CmResourceTypeMemory);

                        //
                        // The port is in memory space on this machine.  We
                        // need to map some virtual addresses over the physical
                        // address provided us, and remember to do an UNMAP
                        // if/when we have to return the resources.
                        //
                        DevExt->MappedPorts = TRUE;

                        ///DevExt->AmccBaseRegisterAddress =
                        DevExt->port =
                            (ULONG)MmMapIoSpace(prdTranslated->u.Memory.Start,
                                          DEF_PORT_RANGE,
        			          /*prdTranslated->u.Memory.Length,*/
                                          MmNonCached);


#if DBG
                        uLan_DbgPrint("uLan: Translated resource is MEMORY at 0x%0x\n",
                                    DevExt->port);
#endif

                    }

                    break;


                case CmResourceTypeInterrupt:

#if DBG
                    uLan_DbgPrint("uLan: Configuring Interrupt resource ...\n");
#endif
                    //
                    // Be sure we get only ONE interrupt resource
                    //
                    ASSERT(DevExt->irq == 0);

                    //
                    // Again, assume that the translated and raw resources
                    // are in the same order and number
                    //
                    ASSERT(CmResourceTypeInterrupt == prdTranslated->Type);

                    ///DevExt->InterruptLevel       = (UCHAR)prdTranslated->u.Interrupt.Level;
                    ///DevExt->InterruptVector      = prdTranslated->u.Interrupt.Vector;
                    ///DevExt->InterruptAffinity    = prdTranslated->u.Interrupt.Affinity;
       		    DevExt->Irql = (UCHAR)prdTranslated->u.Interrupt.Level;
    		    DevExt->irq = prdTranslated->u.Interrupt.Vector;
    		    DevExt->InterruptAffinity = prdTranslated->u.Interrupt.Affinity;
                    
                    if (prdTranslated->Flags & CM_RESOURCE_INTERRUPT_LATCHED) {
                    
                        DevExt->InterruptMode = Latched;

                    } else {
                    
                        DevExt->InterruptMode = LevelSensitive;
                    }

                    //
                    // Because this is a PCI device, we KNOW it must be
                    // a LevelSensitive Interrupt
                    //
                    ///ASSERT(DevExt->InterruptMode == LevelSensitive);

#if DBG
                    uLan_DbgPrint("uLan: Interrupt level: 0x%0x, Vector: 0x%0x, Affinity: 0x%0x\n",
                                DevExt->Irql,
                                DevExt->irq,
                                DevExt->InterruptAffinity);
#endif
                    break;

                default:
#if DBG
                    uLan_DbgPrint("uLan: Unhandled Resource -- CmResourceType received 0x%x\n", prd->Type);
#endif
                    break;
            }
        }

        //
        // We NEED the interrupt info AND one port
        //
        if(!DevExt->irq || !DevExt->port){
          uLan_DbgPrint("uLan: Port (0x%0lX) or Irq (%d) undefined\n", 
    		    DevExt->port,DevExt->irq);
          return STATUS_UNSUCCESSFUL;
        }
    }


    //
    // Register our DPCforISR routine.  This is the routine which will
    // be used to complete our interrupt processing.
    //
    ///IoInitializeDpcRequest(DevExt->DeviceObject, DpcForIsr);
    KeInitializeDpc(&DevExt->bottom_dpc,ulan_bottom_dpc,DevExt);
    KeInitializeDpc(&DevExt->wd_timer_dpc,ulan_wd_dpc,DevExt);
    KeInitializeTimer(&DevExt->wd_timer);


    // Increase spinlock level
    if(uL_SpinLock_Irql<DevExt->Irql)
	uL_SpinLock_Irql=DevExt->Irql;
    uLan_DbgPrint("uLan: spin lock irql=%d\n",uL_SpinLock_Irql);


    if (!DevExt->usb_bus) {

        //
        // Connect to interrupt from the device.  After this call,
        // interrupts from the device will result in calls to our uLan HandleInterrupt
        // function.
        //
        code = IoConnectInterrupt(&DevExt->InterruptObject,
    			uld_irq_handler,	    // ServiceRoutine 
    			DevExt,			    // ServiceContext
    			NULL,			    // SpinLock
    			DevExt->irq,		    // Vector
    			DevExt->Irql,		    // Irql 
    			DevExt->Irql,		    // SynchronizeIrql
    			DevExt->InterruptMode,	    // InterruptMode
    			TRUE,			    // ShareVector 
    			DevExt->InterruptAffinity,  // ProcessorEnableMask 
    			FALSE);			    // FloatingSave 


        if (!NT_SUCCESS(code))  {

    #if DBG
            uLan_DbgPrint("uLan: IoConnectInterrupt failed with error 0x%x", code);
    #endif
            //
            // We're outa here 
            //
            return(code);
        }
    }
    
    //
    // Now we are ready to start uLan communication.
    //
    ///ResetAdapter(DevExt->DeviceObject, FALSE);

    DevExt->baud_val=(int)uLanBaudrate;
    DevExt->baud_base=(int)uLanBaudBase;
    DevExt->my_adr=(int)uLanMyAddress;
     #if DBG
      uLan_DbgPrint("uLan: uLanBaudrate:%d, uLanMyAddress:%d\n",DevExt->baud_val,DevExt->my_adr);
     #endif    
    if(DevExt->State==STATE_NEVER_STARTED) {
     #if DBG
      uLan_DbgPrint("uLan: StartDevice: Calling ul_drv_init_ext\n");
     #endif
      code = ul_drv_init_ext(DevExt, DevExt->port, DevExt->irq,
	 (int)uLanBaudrate, uLanBaudBase, ChipOptions, 
	 /*buffer_size*/ 0x10000, (int)uLanMyAddress);
    }else{
     #if DBG
      uLan_DbgPrint("uLan: StartDevice: Calling ul_drv_new_start\n");
     #endif
      ul_drv_new_init_state(DevExt,(int)uLanMyAddress);
      if(ul_drv_new_start(DevExt,0x10000)<0)
	code = STATUS_INSUFFICIENT_RESOURCES;
      else
	code = STATUS_SUCCESS;
    }

    if(!NT_SUCCESS(code)) {
     #if DBG
      uLan_DbgPrint("uLan: StartDevice: Start of hardware failed\n");
     #endif
      IoDisconnectInterrupt(DevExt->InterruptObject);
      DevExt->InterruptObject = NULL;
      ul_drv_done_ext(DevExt);
    }

    return code;
}

///////////////////////////////////////////////////////////////////////////////
//
// CanStopDevice
//
//      This routine determines if the device cab be safely stopped.  In
//      our case we'll assume you can always stop the device.  A device
//      might not be able to be stopped, for example, if it doesn't have
//      a queue for incoming requests or if it was notified that it is
//      in the paging path.
//
//  INPUTS:
//
//      devExt  - Address of our device extension.
//      Irp     - Address of the input IRP.
//
//  OUTPUTS:
//
//      None.
//
//  RETURNS:
//
//    STATUS_SUCCESS;
//
//  IRQL:
//
//
//  NOTES:
//
//
///////////////////////////////////////////////////////////////////////////////
NTSTATUS CanStopDevice(PULAN_DEVICE_EXTENSION devExt, PIRP Irp)
{
    UNREFERENCED_PARAMETER(devExt);
    UNREFERENCED_PARAMETER(Irp);