[USBEHCI_NEW]

hub_controller: 
- Implement  StatusChangeEndpointCallBack called by HardwareDevice class when port status has changed on controller.
- Move Status Change Endpoint query code to IQueryStatusChageEndpoint as it is also needed by StatusChangeEndpointCallBack.
usb_request: 
- Implement InternalCreateUsbRequest.
usb_queue:
- Implement  CreateUsbRequest and AddUsbRequest
hardware:
- Implement GetAsyncListRegister and GetPeriodicListRegister.
- Implement SetStatusChangeEndpointCallBack for setting callback and context. Call the callback when a port status changes.
- Initialize the UsbQueue after creating the AsyncQueueHead, as the UsbQueue calls will call back with GetAsyncListRegister.



svn path=/branches/usb-bringup/; revision=51407

drivers/usb/usbehci_new/usb_request.cpp

@@ -934,4 +934,38 @@ CUSBRequest::ShouldReleaseRequestAfterCompletion()
         //
         return FALSE;
     }
-}
+}
+
+NTSTATUS
+InternalCreateUSBRequest(
+    PUSBREQUEST *OutRequest)
+{
+    PUSBREQUEST This;
+
+    //
+    // allocate requests
+    //
+    This = new(NonPagedPool, TAG_USBEHCI) CUSBRequest(0);
+    if (!This)
+    {
+        //
+        // failed to allocate
+        //
+        return STATUS_INSUFFICIENT_RESOURCES;
+    }
+
+    //
+    // add reference count
+    //
+    This->AddRef();
+
+    //
+    // return result
+    //
+    *OutRequest = (PUSBREQUEST)This;
+
+    //
+    // done
+    //
+    return STATUS_SUCCESS;
+}