// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.hardware.usb.hci;

using zx;
using fuchsia.hardware.usb.bus;
using fuchsia.hardware.usb.hubdescriptor;
using fuchsia.hardware.usb.request;

[Transport = "Banjo", BanjoLayout="ddk-protocol"]
protocol UsbHci {
    /// Queues a USB request with the HCI driver.
    RequestQueue([InOut] fuchsia.hardware.usb.request.UsbRequest usb_request,
                 [InOut] fuchsia.hardware.usb.request.UsbRequestComplete complete_cb) -> ();
    /// Registers callbacks to the USB bus driver with the HCI driver.
    SetBusInterface(fuchsia.hardware.usb.bus.UsbBusInterface bus_intf) -> ();
    /// Returns the maximum number of USB devices that might be connected to the controller.
    GetMaxDeviceCount() -> (uint64 count);
    /// Enables or disables an endpoint using parameters derived from |ep_desc|.
    EnableEndpoint(uint32 device_id, fuchsia.hardware.usb.descriptor.UsbEndpointDescriptor ep_desc,
                   fuchsia.hardware.usb.descriptor.UsbSsEpCompDescriptor ss_com_desc, bool enable) -> (zx.status s);
    /// Returns the current frame (in milliseconds), used for isochronous transfers.
    GetCurrentFrame() -> (uint64 frame);
    /// Used by the USB hub driver to configure a newly enumerated USB hub.
    ConfigureHub(uint32 device_id, fuchsia.hardware.usb.descriptor.UsbSpeed speed,
                 fuchsia.hardware.usb.hubdescriptor.UsbHubDescriptor desc, bool multi_tt) -> (zx.status s);
    /// Used by the USB hub driver to notify the HCI driver when a new device is attached.
    HubDeviceAdded(uint32 device_id, uint32 port, fuchsia.hardware.usb.descriptor.UsbSpeed speed) -> (zx.status s);
    /// Used by the USB hub driver to notify the HCI driver when a device has been removed.
    HubDeviceRemoved(uint32 device_id, uint32 port) -> (zx.status s);
    /// Used by the USB hub driver to notify the HCI driver when a device has been reset.
    HubDeviceReset(uint32 device_id, uint32 port) -> (zx.status s);
    /// Resets an endpoint on the specified device.
    ResetEndpoint(uint32 device_id, uint8 ep_address) -> (zx.status s);
    /// Resets the specified device.
    ResetDevice(uint32 hub_address, uint32 device_id) -> (zx.status s);
    /// Returns the maximum size of a packet that can be queued on the specified endpoint.
    GetMaxTransferSize(uint32 device_id, uint8 ep_address) -> (uint64 size);
    /// Cancels all transactions currently queued on the specified endpoint.
    CancelAll(uint32 device_id, uint8 ep_address) -> (zx.status s);
    /// Returns the size needed for a |usb_request_t|, including private storage needed by the
    /// HCI driver.
    GetRequestSize() -> (uint64 size);
};