1 files changed, 101 insertions, 0 deletions
diff --git a/pos/drivers/barcodescanner/Device.cpp b/pos/drivers/barcodescanner/Device.cpp
new file mode 100644
index 00000000..d122e60a
--- /dev/null
+++ b/pos/drivers/barcodescanner/Device.cpp
@@ -0,0 +1,101 @@
+#include <pch.h>
+
+#include "File.h"
+#include "PosEvents.h"
+#include "Ioctl.h"
+#include "IoRead.h"
+
+/*
+** Driver TODO: Complete the implementation of EvtDriverDeviceAdd for your specific device.
+**
+** WDF calls this callback when a device instance is added to the driver.  Good drivers will do a lot of
+** work here to set up everything necessary, such as adding callbacks for PNP power state changes.
+** This function defines an IO queue for handling DeviceIoControl and file read requests, both of which are
+** important to the POS barcode scanner model.
+**
+** Note that this is not a complete device add implementation, as the PNP power callbacks are not handled.
+** Additionally, driver writers may wish to set up additional queues to serialize device property requests
+** (see Ioctl.cpp for more info).
+*/
+NTSTATUS EvtDriverDeviceAdd(_In_ WDFDRIVER /* UnusedDriver */, _Inout_ PWDFDEVICE_INIT DeviceInit)
+{
+    NTSTATUS status = STATUS_SUCCESS;
+    WDF_FILEOBJECT_CONFIG fileConfig;
+    WDF_OBJECT_ATTRIBUTES deviceAttributes;
+    WDF_OBJECT_ATTRIBUTES fileAttributes;
+    WDFDEVICE device;
+
+    // Handle file events
+    WDF_FILEOBJECT_CONFIG_INIT(
+        &fileConfig,
+        EvtDeviceFileCreate,
+        EvtFileClose,
+        WDF_NO_EVENT_CALLBACK
+        );
+
+    WDF_OBJECT_ATTRIBUTES_INIT(&fileAttributes);
+    WdfDeviceInitSetFileObjectConfig(
+        DeviceInit,
+        &fileConfig,
+        &fileAttributes
+        );
+
+    // Create Device
+    WDF_OBJECT_ATTRIBUTES_INIT(&deviceAttributes);
+    status = WdfDeviceCreate(
+        &DeviceInit,
+        &deviceAttributes,
+        &device
+        );
+
+    if (!NT_SUCCESS(status))
+    {
+        return status;
+    }
+
+    // Create a device interface for POS Barcode Scanner so that the device can be enumerated
+    status = WdfDeviceCreateDeviceInterface(
+        device,
+        &GUID_DEVINTERFACE_POS_SCANNER,
+        NULL
+        );
+
+    if (!NT_SUCCESS(status))
+    {
+        return status;
+    }
+
+    // Initialize the POS library
+    POS_CX_ATTRIBUTES posCxAttributes;
+    POS_CX_ATTRIBUTES_INIT(&posCxAttributes);
+    posCxAttributes.EvtDeviceOwnershipChange = EvtDeviceOwnershipChange;
+
+    status = PosCxInit(device, &posCxAttributes);
+
+    if (!NT_SUCCESS(status))
+    {
+        return status;
+    }
+
+    // Set up an IO queue to handle DeviceIoControl and ReadFile
+    WDF_IO_QUEUE_CONFIG queueConfig;
+    WDF_OBJECT_ATTRIBUTES attributes;
+    WDFQUEUE queue;
+
+    WDF_IO_QUEUE_CONFIG_INIT_DEFAULT_QUEUE(&queueConfig, WdfIoQueueDispatchSequential);
+    queueConfig.EvtIoDeviceControl = EvtIoDeviceControl;
+    queueConfig.EvtIoRead = EvtIoRead;
+
+    // Call us in PASSIVE_LEVEL
+    WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
+    attributes.ExecutionLevel = WdfExecutionLevelPassive;
+
+    status = WdfIoQueueCreate(
+        device,
+        &queueConfig,
+        &attributes,
+        &queue
+        );
+
+    return status;
+}