/*++

Copyright (c) Microsoft Corporation.  All rights reserved.

Module Name:

    driver.cpp

Abstract:

    This file contains the driver entry points and callbacks.

Environment:

    Windows User-Mode Driver Framework

--*/

#include "precomp.h"
#include "Trace.h"
#include "Defaults.h"
#include "Driver.h"
#include "Device.h"

#include "Driver.tmh"


extern "C"
NTSTATUS
DriverEntry(
    _In_ PDRIVER_OBJECT DriverObject,
    _In_ PUNICODE_STRING RegistryPath
)
{
    NTSTATUS status = STATUS_SUCCESS;

    // Initialize WPP Tracing
    WPP_INIT_TRACING(DriverObject, RegistryPath);

    TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Entry");

    // Register a cleanup callback so that we can call WPP_CLEANUP when
    // the framework driver object is deleted during driver unload.
    WDF_OBJECT_ATTRIBUTES attributes;
    WDF_OBJECT_ATTRIBUTES_INIT(&attributes);
    attributes.EvtCleanupCallback = GnssUmdfEvtDriverContextCleanup;

    WDF_DRIVER_CONFIG config;
    WDF_DRIVER_CONFIG_INIT(&config,
                           CDevice::OnDeviceAdd);

    config.EvtDriverUnload = OnDriverUnload;

    status = WdfDriverCreate(DriverObject,
                             RegistryPath,
                             &attributes,
                             &config,
                             WDF_NO_HANDLE);

    if (!NT_SUCCESS(status))
    {
        TraceEvents(TRACE_LEVEL_ERROR, TRACE_DRIVER, "WdfDriverCreate failed %!STATUS!", status);

        WPP_CLEANUP(DriverObject);

        return status;
    }

    TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Exit");

    return status;
}

void
GnssUmdfEvtDriverContextCleanup(
    _In_ WDFOBJECT DriverObject
)
/*++
Routine Description:

    Free all the resources allocated in DriverEntry.

Arguments:

    DriverObject - handle to a WDF Driver object.

Return Value:

    void.

--*/
{
    UNREFERENCED_PARAMETER(DriverObject);

    TraceEvents(TRACE_LEVEL_INFORMATION, TRACE_DRIVER, "%!FUNC! Entry");

    // Stop WPP Tracing
    WPP_CLEANUP(WdfDriverWdmGetDriverObject((WDFDRIVER)DriverObject));
}

void
OnDriverUnload(
    _In_ WDFDRIVER /* Driver */
)
{
    WPP_CLEANUP(Driver);
}