system/fidl/ddk/protocols/bt-hci.fidl

// 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 ddk.protocol.bt_hci;

using zx;

[Layout="ddk-protocol", DefaultProtocol]
interface BtHci {
  /// Open the two-way HCI command channel for sending HCI commands and
  /// receiving event packets.  Returns ZX_ERR_ALREADY_BOUND if the channel
  /// is already open.
  1: OpenCommandChannel() -> (zx.status s, handle<channel> channel);
  /// Open the two-way HCI ACL data channel.
  /// Returns ZX_ERR_ALREADY_BOUND if the channel is already open.
  2: OpenAclDataChannel() -> (zx.status s, handle<channel> channel);
  /// Open an output-only channel for monitoring HCI traffic.
  /// The format of each message is: [1-octet flags] [n-octet payload]
  /// The flags octet is a bitfield with the following values defined:
  ///  - 0x00: The payload represents a command packet sent from the host to the
  ///          controller.
  ///  - 0x01: The payload represents an event packet sent by the controller.
  /// Returns ZX_ERR_ALREADY_BOUND if the channel is already open.
  3: OpenSnoopChannel() -> (zx.status s, handle<channel> channel);
};