sdk/banjo/fuchsia.hardware.serialimpl.async/serial-impl-async.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 fuchsia.hardware.serialimpl.async;

using zx;
using fuchsia.hardware.serial;

type SerialState = strict enum : uint32 {
    READABLE = 0x1;
    WRITABLE = 0x2;
};

@transport("Banjo")
@banjo_layout("ddk-protocol")
protocol SerialImplAsync {
    GetInfo() -> (struct {
        s zx.status;
        info fuchsia.hardware.serial.SerialPortInfo;
    });
    /// Configures the given serial port.
    Config(struct {
        baud_rate uint32;
        flags uint32;
    }) -> (struct {
        s zx.status;
    });
    Enable(struct {
        enable bool;
    }) -> (struct {
        s zx.status;
    });
    /// Queues a receive operation. It is an error to queue
    /// more than one receive operation at a time.
    /// The callback will be invoked on the interrupt thread or the calling thread
    /// if the write completes immediately.
    /// ZX_ERR_NOT_SUPPORTED will be returned if a read is already pending.
    @async
    ReadAsync() -> (struct {
        s zx.status;
        @buffer
        buf vector<uint8>:MAX;
    });
    /// Queues a packet for transmission. It is an error to queue
    /// more than one transmit at a time. The callback will be invoked
    /// on the interrupt thread, or the calling thread if data is available.
    /// ZX_ERR_NOT_SUPPORTED will be returned if a write is already pending.
    @async
    WriteAsync(struct {
        @buffer
        buf vector<uint8>:MAX;
    }) -> (struct {
        s zx.status;
    });
    /// Immediately cancels all outstanding asynchronous I/O
    CancelAll() -> ();
};