/*
 * PROJECT:     ReactOS Universal Serial Bus Bulk Enhanced Host Controller Interface
 * LICENSE:     GPL - See COPYING in the top level directory
 * FILE:        drivers/usb/usbccgp/fdo.c
 * PURPOSE:     USB  device driver.
 * PROGRAMMERS:
 *              Michael Martin (michael.martin@reactos.org)
 *              Johannes Anderwald (johannes.anderwald@reactos.org)
 *              Cameron Gutman
 */

#include "usbccgp.h"

NTSTATUS
NTAPI
FDO_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
FDO_QueryCapabilities(
    IN PDEVICE_OBJECT DeviceObject,
    IN OUT PDEVICE_CAPABILITIES Capabilities)
{
    PIRP Irp;
    KEVENT Event;
    NTSTATUS Status;
    PIO_STACK_LOCATION IoStack;
    PFDO_DEVICE_EXTENSION FDODeviceExtension;

    //
    // get device extension
    //
    FDODeviceExtension = (PFDO_DEVICE_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, FDO_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->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
FDO_DeviceRelations(
    PDEVICE_OBJECT DeviceObject, 
    PIRP Irp)
{
    ULONG DeviceCount = 0;
    ULONG Index;
    PDEVICE_RELATIONS DeviceRelations;
    PIO_STACK_LOCATION IoStack;
    PFDO_DEVICE_EXTENSION FDODeviceExtension;

    //
    // get device extension
    //
    FDODeviceExtension = (PFDO_DEVICE_EXTENSION)DeviceObject->DeviceExtension;

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

    //
    // check if relation type is BusRelations
    //
    if (IoStack->Parameters.QueryDeviceRelations.Type != BusRelations)
    {
        //
        // FDO always only handles bus relations
        //
        return USBCCGP_SyncForwardIrp(FDODeviceExtension->NextDeviceObject, Irp);
    }

    //
    // go through array and count device objects
    //
    for(Index = 0; Index < FDODeviceExtension->FunctionDescriptorCount; Index++)
    {
        if (FDODeviceExtension->ChildPDO[Index])
        {
            //
            // child pdo
            //
            DeviceCount++;
        }
    }

    //
    // allocate device relations
    //
    DeviceRelations = (PDEVICE_RELATIONS)AllocateItem(PagedPool, sizeof(DEVICE_RELATIONS) + (DeviceCount > 1 ? (DeviceCount-1) * sizeof(PDEVICE_OBJECT) : 0));
    if (!DeviceRelations)
    {
        //
        // no memory
        //
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // add device objects
    //
    for(Index = 0; Index < FDODeviceExtension->FunctionDescriptorCount; Index++)
    {
        if (FDODeviceExtension->ChildPDO[Index])
        {
            //
            // store child pdo
            //
            DeviceRelations->Objects[DeviceRelations->Count] = FDODeviceExtension->ChildPDO[Index];

            //
            // add reference
            //
            ObReferenceObject(FDODeviceExtension->ChildPDO[Index]);

            //
            // increment count
            //
            DeviceRelations->Count++;
        }
    }

    //
    // store result
    //
    Irp->IoStatus.Information = (ULONG_PTR)DeviceRelations;

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

NTSTATUS
FDO_CreateChildPdo(
    IN PDEVICE_OBJECT DeviceObject)
{
    NTSTATUS Status;
    PDEVICE_OBJECT PDODeviceObject;
    PPDO_DEVICE_EXTENSION PDODeviceExtension;
    PFDO_DEVICE_EXTENSION FDODeviceExtension;
    ULONG Index;

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

    //
    // lets create array for the child PDO
    //
    FDODeviceExtension->ChildPDO = AllocateItem(NonPagedPool, sizeof(PDEVICE_OBJECT) * FDODeviceExtension->FunctionDescriptorCount);
    if (!FDODeviceExtension->ChildPDO)
    {
        //
        // no memory
        //
        return STATUS_INSUFFICIENT_RESOURCES;
    }

    //
    // create pdo for each function
    //
    for(Index = 0; Index < FDODeviceExtension->FunctionDescriptorCount; Index++)
    {
        //
        // create the PDO
        //
        Status = IoCreateDevice(FDODeviceExtension->DriverObject, sizeof(PDO_DEVICE_EXTENSION), NULL, FILE_DEVICE_USB, FILE_AUTOGENERATED_DEVICE_NAME, FALSE, &PDODeviceObject);
        if (!NT_SUCCESS(Status))
        {
            //
            // failed to create device object
            //
            DPRINT1("IoCreateDevice failed with %x\n", Status);
            return Status;
        }

        //
        // store in array
        //
        FDODeviceExtension->ChildPDO[Index] = PDODeviceObject;

        //
        // get device extension
        //
        PDODeviceExtension = (PPDO_DEVICE_EXTENSION)PDODeviceObject->DeviceExtension;
        RtlZeroMemory(PDODeviceExtension, sizeof(PDO_DEVICE_EXTENSION));

        //
        // init device extension
        //
        PDODeviceExtension->Common.IsFDO = FALSE;
        PDODeviceExtension->FunctionDescriptor = &FDODeviceExtension->FunctionDescriptor[Index];
        PDODeviceExtension->NextDeviceObject = DeviceObject;
        PDODeviceExtension->FunctionIndex = Index;
        RtlCopyMemory(&PDODeviceExtension->Capabilities, &FDODeviceExtension->Capabilities, sizeof(DEVICE_CAPABILITIES));

        //
        // patch the stack size
        //
        PDODeviceObject->StackSize = DeviceObject->StackSize + 1;

        //
        // set device flags
        //
        PDODeviceObject->Flags |= DO_DIRECT_IO | DO_MAP_IO_BUFFER;

        //
        // device is initialized
        //
        PDODeviceObject->Flags &= ~DO_DEVICE_INITIALIZING;
    }

    //
    // done
    //
    return STATUS_SUCCESS;
}

NTSTATUS
FDO_StartDevice(
    PDEVICE_OBJECT DeviceObject, 
    PIRP Irp)
{
    NTSTATUS Status;
    PFDO_DEVICE_EXTENSION FDODeviceExtension;

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

    //
    // first start lower device
    //
    Status = USBCCGP_SyncForwardIrp(FDODeviceExtension->NextDeviceObject, Irp);

    if (!NT_SUCCESS(Status))
    {
        //
        // failed to start lower device
        //
        DPRINT1("FDO_StartDevice lower device failed to start with %x\n", Status);
        return Status;
    }

    // get descriptors
    Status = USBCCGP_GetDescriptors(DeviceObject);
    if (!NT_SUCCESS(Status))
    {
        // failed to start lower device
        DPRINT1("FDO_StartDevice failed to get descriptors with %x\n", Status);
        return Status;
    }

    // get capabilities
    Status = FDO_QueryCapabilities(DeviceObject, &FDODeviceExtension->Capabilities);
    if (!NT_SUCCESS(Status))
    {
        // failed to start lower device
        DPRINT1("FDO_StartDevice failed to get capabilities with %x\n", Status);
        return Status;
    }

    // now select the configuration
    Status = USBCCGP_SelectConfiguration(DeviceObject, FDODeviceExtension);
    if (!NT_SUCCESS(Status))
    {
        // failed to select interface
        DPRINT1("FDO_StartDevice failed to get capabilities with %x\n", Status);
        return Status;
    }

    // query bus interface
    USBCCGP_QueryInterface(FDODeviceExtension->NextDeviceObject, &FDODeviceExtension->BusInterface);

    // now enumerate the functions
    Status = USBCCGP_EnumerateFunctions(DeviceObject);
    if (!NT_SUCCESS(Status))
    {
        // failed to enumerate functions
        DPRINT1("Failed to enumerate functions with %x\n", Status);
        return Status;
    }

    //
    // sanity checks
    //
    ASSERT(FDODeviceExtension->FunctionDescriptorCount);
    ASSERT(FDODeviceExtension->FunctionDescriptor);
    DumpFunctionDescriptor(FDODeviceExtension->FunctionDescriptor, FDODeviceExtension->FunctionDescriptorCount);

    //
    // now create the pdo
    //
    Status = FDO_CreateChildPdo(DeviceObject);
    if (!NT_SUCCESS(Status))
    {
        //
        // failed
        //
        DPRINT1("FDO_CreateChildPdo failed with %x\n", Status);
        return Status;
    }

    //
    // inform pnp manager of new device objects
    //
    IoInvalidateDeviceRelations(FDODeviceExtension->PhysicalDeviceObject, BusRelations);

    //
    // done
    //
    DPRINT1("[USBCCGP] FDO initialized successfully\n");
    return Status;
}

NTSTATUS
FDO_HandlePnp(
    PDEVICE_OBJECT DeviceObject,
    PIRP Irp)
{
    PIO_STACK_LOCATION IoStack;
    NTSTATUS Status;
    PFDO_DEVICE_EXTENSION FDODeviceExtension;

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


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

    switch(IoStack->MinorFunction)
    {
        case IRP_MN_START_DEVICE:
        {
            //
            // start the device
            //
            Status = FDO_StartDevice(DeviceObject, Irp);
            break;
        }
        case IRP_MN_QUERY_DEVICE_RELATIONS:
        {
            //
            // handle device relations
            //
            Status = FDO_DeviceRelations(DeviceObject, Irp);
            break;
        }
        case IRP_MN_QUERY_CAPABILITIES:
        {
            //
            // copy capabilities
            //
            RtlCopyMemory(IoStack->Parameters.DeviceCapabilities.Capabilities, &FDODeviceExtension->Capabilities, sizeof(DEVICE_CAPABILITIES));
            Status = USBCCGP_SyncForwardIrp(FDODeviceExtension->NextDeviceObject, Irp);
            if (NT_SUCCESS(Status))
            {
                //
                // surprise removal ok
                //
                IoStack->Parameters.DeviceCapabilities.Capabilities->SurpriseRemovalOK = TRUE;
            }
            break;
       }
       default:
       {
            //
            // forward irp to next device object
            //
            IoSkipCurrentIrpStackLocation(Irp);
            return IoCallDriver(FDODeviceExtension->NextDeviceObject, Irp);
       }

    }

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


}

NTSTATUS
FDO_Dispatch(
    PDEVICE_OBJECT DeviceObject, 
    PIRP Irp)
{
    PIO_STACK_LOCATION IoStack;
    NTSTATUS Status;

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

    switch(IoStack->MajorFunction)
    {
        case IRP_MJ_PNP:
            return FDO_HandlePnp(DeviceObject, Irp);
        default:
            DPRINT1("FDO_Dispatch Function %x not implemented\n", IoStack->MajorFunction);
            ASSERT(FALSE);
            Status = Irp->IoStatus.Status;
            IoCompleteRequest(Irp, IO_NO_INCREMENT);
            return Status;
    }

}