/*
 * PROJECT:     ReactOS Universal Serial Bus Human Interface Device Driver
 * LICENSE:     GPL - See COPYING in the top level directory
 * FILE:        drivers/hid/hidclass/fdo.c
 * PURPOSE:     HID Class Driver
 * PROGRAMMERS:
 *              Michael Martin (michael.martin@reactos.org)
 *              Johannes Anderwald (johannes.anderwald@reactos.org)
 */
#include "precomp.h"

NTSTATUS
NTAPI
HidClassFDO_QueryCapabilitiesCompletionRoutine(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp,
    IN PVOID Context)
{
    //
    // set event
    //
    KeSetEvent((PRKEVENT)Context, 0, FALSE);

    //
    // completion is done in the HidClassFDO_QueryCapabilities routine
    //
    return STATUS_MORE_PROCESSING_REQUIRED;
}

NTSTATUS
HidClassFDO_QueryCapabilities(
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PDEVICE_CAPABILITIES Capabilities)
{
    PIRP Irp;
    KEVENT Event;
    NTSTATUS Status;
    PIO_STACK_LOCATION IoStack;
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // init event
    //
    KeInitializeEvent(&Event, NotificationEvent, FALSE);

    //
    // now allocte the irp
    //
    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
    if (!Irp)
    {
        //
        // no memory
        //
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // get next stack location
    //
    IoStack = IoGetNextIrpStackLocation(Irp);

    //
    // init stack location
    //
    IoStack->MajorFunction = IRP_MJ_PNP;
    IoStack->MinorFunction = IRP_MN_QUERY_CAPABILITIES;
    IoStack->Parameters.DeviceCapabilities.Capabilities = Capabilities;

    //
    // set completion routine
    //
    IoSetCompletionRoutine(Irp, HidClassFDO_QueryCapabilitiesCompletionRoutine, (PVOID)&Event, TRUE, TRUE, TRUE);

    //
    // init capabilities
    //
    RtlZeroMemory(Capabilities, sizeof(DEVICE_CAPABILITIES));
    Capabilities->Size = sizeof(DEVICE_CAPABILITIES);
    Capabilities->Version = 1; // FIXME hardcoded constant
    Capabilities->Address = MAXULONG;
    Capabilities->UINumber = MAXULONG;

    //
    // pnp irps have default completion code
    //
    Irp->IoStatus.Status = STATUS_NOT_SUPPORTED;

    //
    // call lower  device
    //
    Status = IoCallDriver(FDODeviceExtension->Common.HidDeviceExtension.NextDeviceObject, Irp);
    if (Status == STATUS_PENDING)
    {
        //
        // wait for completion
        //
        KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
    }

    //
    // get status
    //
    Status = Irp->IoStatus.Status;

    //
    // complete request
    //
    IoFreeIrp(Irp);

    //
    // done
    //
    return Status;
}

NTSTATUS
NTAPI
HidClassFDO_DispatchRequestSynchronousCompletion(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp,
    IN PVOID Context)
{
    //
    // signal event
    //
    KeSetEvent((PRKEVENT)Context, 0, FALSE);

    //
    // done
    //
    return STATUS_MORE_PROCESSING_REQUIRED;
}


NTSTATUS
HidClassFDO_DispatchRequestSynchronous(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    KEVENT Event;
    PHIDCLASS_COMMON_DEVICE_EXTENSION CommonDeviceExtension;
    NTSTATUS Status;
    PIO_STACK_LOCATION IoStack;

    //
    // init event
    //
    KeInitializeEvent(&Event, NotificationEvent, FALSE);

    //
    // get device extension
    //
    CommonDeviceExtension = (PHIDCLASS_COMMON_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

    //
    // set completion routine
    //
    IoSetCompletionRoutine(Irp, HidClassFDO_DispatchRequestSynchronousCompletion, &Event, TRUE, TRUE, TRUE);

    ASSERT(Irp->CurrentLocation > 0);
    //
    // create stack location
    //
    IoSetNextIrpStackLocation(Irp);

    //
    // get next stack location
    //
    IoStack = IoGetCurrentIrpStackLocation(Irp);

    //
    // store device object
    //
    IoStack->DeviceObject = DeviceObject;



    //
    // call driver
    //
    DPRINT1("IoStack MajorFunction %x MinorFunction %x\n", IoStack->MajorFunction, IoStack->MinorFunction);
    Status = CommonDeviceExtension->DriverExtension->MajorFunction[IoStack->MajorFunction](DeviceObject, Irp);

    //
    // wait for the request to finish
    //
    if (Status == STATUS_PENDING)
    {
        KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);

        //
        // update status
        //
        Status = Irp->IoStatus.Status;
    }

    //
    // done
    //
    return Status;
}

NTSTATUS
HidClassFDO_GetDescriptors(
    IN PDEVICE_OBJECT DeviceObject)
{
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;
    PIRP Irp;
    PIO_STACK_LOCATION IoStack;
    NTSTATUS Status;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // lets allocate irp
    //
    Irp = IoAllocateIrp(DeviceObject->StackSize, FALSE);
    if (!Irp)
    {
        //
        // no memory
        //
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // get stack location
    //
    IoStack = IoGetNextIrpStackLocation(Irp);

    //
    // init stack location
    //
    IoStack->MajorFunction = IRP_MJ_INTERNAL_DEVICE_CONTROL;
    IoStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_DEVICE_DESCRIPTOR;
    IoStack->Parameters.DeviceIoControl.OutputBufferLength = sizeof(HID_DESCRIPTOR);
    IoStack->Parameters.DeviceIoControl.InputBufferLength = 0;
    IoStack->Parameters.DeviceIoControl.Type3InputBuffer = NULL;
    Irp->UserBuffer = &FDODeviceExtension->HidDescriptor;

    //
    // send request
    //
    Status = HidClassFDO_DispatchRequestSynchronous(DeviceObject, Irp);
    if (!NT_SUCCESS(Status))
    {
        //
        // failed to get device descriptor
        //
        DPRINT1("[HIDCLASS] IOCTL_HID_GET_DEVICE_DESCRIPTOR failed with %x\n", Status);
        IoFreeIrp(Irp);
        return Status;
    }

    //
    // lets get device attributes
    //
    IoStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_DEVICE_ATTRIBUTES;
    IoStack->Parameters.DeviceIoControl.OutputBufferLength = sizeof(HID_DEVICE_ATTRIBUTES);
    Irp->UserBuffer = &FDODeviceExtension->Attributes;

    //
    // send request
    //
    Status = HidClassFDO_DispatchRequestSynchronous(DeviceObject, Irp);
    if (!NT_SUCCESS(Status))
    {
        //
        // failed to get device descriptor
        //
        DPRINT1("[HIDCLASS] IOCTL_HID_GET_DEVICE_ATTRIBUTES failed with %x\n", Status);
        IoFreeIrp(Irp);
        return Status;
    }

    //
    // sanity checks
    //
    ASSERT(FDODeviceExtension->HidDescriptor.bLength == sizeof(HID_DESCRIPTOR));
    ASSERT(FDODeviceExtension->HidDescriptor.bNumDescriptors > 0);
    ASSERT(FDODeviceExtension->HidDescriptor.DescriptorList[0].wReportLength > 0);
    ASSERT(FDODeviceExtension->HidDescriptor.DescriptorList[0].bReportType == HID_REPORT_DESCRIPTOR_TYPE);


    //
    // now allocate space for the report descriptor
    //
    FDODeviceExtension->ReportDescriptor = (PUCHAR)ExAllocatePool(NonPagedPool, FDODeviceExtension->HidDescriptor.DescriptorList[0].wReportLength);
    if (!FDODeviceExtension->ReportDescriptor)
    {
        //
        // not enough memory
        //
        IoFreeIrp(Irp);
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // init stack location
    //
    IoStack->Parameters.DeviceIoControl.IoControlCode = IOCTL_HID_GET_REPORT_DESCRIPTOR;
    IoStack->Parameters.DeviceIoControl.OutputBufferLength = FDODeviceExtension->HidDescriptor.DescriptorList[0].wReportLength;
    Irp->UserBuffer = FDODeviceExtension->ReportDescriptor;

    //
    // send request
    //
    Status = HidClassFDO_DispatchRequestSynchronous(DeviceObject, Irp);
    if (!NT_SUCCESS(Status))
    {
        //
        // failed to get device descriptor
        //
        DPRINT1("[HIDCLASS] IOCTL_HID_GET_REPORT_DESCRIPTOR failed with %x\n", Status);
        IoFreeIrp(Irp);
        return Status;
    }

    //
    // completed successfully
    //
    return STATUS_SUCCESS;
}


NTSTATUS
HidClassFDO_StartDevice(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    NTSTATUS Status;
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // query capabilities
    //
    Status = HidClassFDO_QueryCapabilities(DeviceObject, &FDODeviceExtension->Capabilities);
    ASSERT(Status == STATUS_SUCCESS);

    //
    // lets start the lower device too
    //
    IoCopyCurrentIrpStackLocationToNext(Irp);
    Status = HidClassFDO_DispatchRequestSynchronous(DeviceObject, Irp);
    ASSERT(Status == STATUS_SUCCESS);

    //
    // lets get the descriptors
    //
    Status = HidClassFDO_GetDescriptors(DeviceObject);
    ASSERT(Status == STATUS_SUCCESS);

    //
    // now get the the collection description
    //
    Status = HidP_GetCollectionDescription(FDODeviceExtension->ReportDescriptor, FDODeviceExtension->HidDescriptor.DescriptorList[0].wReportLength, NonPagedPool, &FDODeviceExtension->DeviceDescription);
    ASSERT(Status == STATUS_SUCCESS);

    //
    // complete request
    //
    Irp->IoStatus.Status = Status;
    IoCompleteRequest(Irp, IO_NO_INCREMENT);
    return Status;
}

NTSTATUS
HidClassFDO_RemoveDevice(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    UNIMPLEMENTED
    ASSERT(FALSE);
    return STATUS_NOT_IMPLEMENTED;
}

NTSTATUS
HidClassFDO_CopyDeviceRelations(
    IN PDEVICE_OBJECT DeviceObject,
    OUT PDEVICE_RELATIONS *OutRelations)
{
    PDEVICE_RELATIONS DeviceRelations;
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;
    ULONG Index;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // allocate result
    //
    DeviceRelations = (PDEVICE_RELATIONS)ExAllocatePool(NonPagedPool, sizeof(DEVICE_RELATIONS) + (FDODeviceExtension->DeviceRelations.Count-1) * sizeof(PDEVICE_OBJECT));
    if (!DeviceRelations)
    {
        //
        // no memory
        //
        *OutRelations = NULL;
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // copy device objects
    //
    for(Index = 0; Index < FDODeviceExtension->DeviceRelations.Count; Index++)
    {
        //
        // reference pdo
        //
        ObReferenceObject(FDODeviceExtension->DeviceRelations.Objects[Index]);

        //
        // store object
        //
        DeviceRelations->Objects[Index] = FDODeviceExtension->DeviceRelations.Objects[Index];
    }

    //
    // set object count
    //
    DeviceRelations->Count = FDODeviceExtension->DeviceRelations.Count;


    //
    // store result
    //
    *OutRelations = DeviceRelations;
    return STATUS_SUCCESS;
}

NTSTATUS
HidClassFDO_DeviceRelations(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;
    PIO_STACK_LOCATION IoStack;
    NTSTATUS Status;
    PDEVICE_RELATIONS DeviceRelations;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // get current irp stack location
    //
    IoStack = IoGetCurrentIrpStackLocation(Irp);

    //
    // check relations type
    //
    if (IoStack->Parameters.QueryDeviceRelations.Type != BusRelations)
    {
        //
        // only bus relations are handled
        //
        IoSkipCurrentIrpStackLocation(Irp);
        return IoCallDriver(FDODeviceExtension->Common.HidDeviceExtension.NextDeviceObject, Irp);
    }

    if (FDODeviceExtension->DeviceRelations.Count == 0)
    {
        //
        // time to create the pdos
        //
        Status = HidClassPDO_CreatePDO(DeviceObject);
        if (!NT_SUCCESS(Status))
        {
            //
            // failed
            //
            DPRINT1("[HIDCLASS] HidClassPDO_CreatePDO failed with %x\n", Status);
            Irp->IoStatus.Status = Status;
            IoCompleteRequest(Irp, IO_NO_INCREMENT);
            return STATUS_SUCCESS;
        }
        //
        // sanity check
        //
        ASSERT(FDODeviceExtension->DeviceRelations.Count > 0);
    }

    //
    // now copy device relations
    //
    Status = HidClassFDO_CopyDeviceRelations(DeviceObject, &DeviceRelations);
    //
    // store result
    //
    Irp->IoStatus.Status = Status;
    Irp->IoStatus.Information = (ULONG_PTR)DeviceRelations;

    //
    // complete request
    //
    IoCompleteRequest(Irp, IO_NO_INCREMENT);
    return Status;
}

NTSTATUS
HidClassFDO_PnP(
    IN PDEVICE_OBJECT DeviceObject,
    IN PIRP Irp)
{
    PIO_STACK_LOCATION IoStack;
    PHIDCLASS_FDO_EXTENSION FDODeviceExtension;

    //
    // get device extension
    //
    FDODeviceExtension = (PHIDCLASS_FDO_EXTENSION)DeviceObject->DeviceExtension;
    ASSERT(FDODeviceExtension->Common.IsFDO);

    //
    // get current irp stack location
    //
    IoStack = IoGetCurrentIrpStackLocation(Irp);
    switch(IoStack->MinorFunction)
    {
        case IRP_MN_START_DEVICE:
        {
             return HidClassFDO_StartDevice(DeviceObject, Irp);
        }
        case IRP_MN_REMOVE_DEVICE:
        {
             return HidClassFDO_RemoveDevice(DeviceObject, Irp);
        }
        case IRP_MN_QUERY_STOP_DEVICE:
        {
            //
            // set status to succes
            //
            Irp->IoStatus.Status = STATUS_SUCCESS;

            //
            // forward to lower device
            //
            IoSkipCurrentIrpStackLocation(Irp);
            return IoCallDriver(FDODeviceExtension->Common.HidDeviceExtension.NextDeviceObject, Irp);
        }
        case IRP_MN_CANCEL_STOP_DEVICE:
        {
            //
            // set status to succes
            //
            Irp->IoStatus.Status = STATUS_SUCCESS;

            //
            // forward to lower device
            //
            IoSkipCurrentIrpStackLocation(Irp);
            return IoCallDriver(FDODeviceExtension->Common.HidDeviceExtension.NextDeviceObject, Irp);
        }
        case IRP_MN_QUERY_DEVICE_RELATIONS:
        {
             return HidClassFDO_DeviceRelations(DeviceObject, Irp);
        }
        default:
        {
            //
            // dispatch to lower device
            //
            IoSkipCurrentIrpStackLocation(Irp);
            return IoCallDriver(FDODeviceExtension->Common.HidDeviceExtension.NextDeviceObject, Irp);
        }
    }
}