system/banjo/ddk-protocol-bt-hci/bt-hci.banjo

// 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"]
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.
    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.
    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.
    OpenSnoopChannel() -> (zx.status s, handle<channel> channel);
};