bluetooth/1.0/default/vendor_interface.h

//
// Copyright 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#pragma once

#include <hidl/HidlSupport.h>

#include "async_fd_watcher.h"
#include "bt_vendor_lib.h"
#include "hci_internals.h"

namespace android {
namespace hardware {
namespace bluetooth {
namespace V1_0 {
namespace implementation {

using ::android::hardware::hidl_vec;
using InitializeCompleteCallback = std::function<void(bool success)>;
using PacketReadCallback =
    std::function<void(HciPacketType, const hidl_vec<uint8_t> &)>;

class FirmwareStartupTimer;

class VendorInterface {
 public:
  static bool Initialize(InitializeCompleteCallback initialize_complete_cb,
                         PacketReadCallback packet_read_cb);
  static void Shutdown();
  static VendorInterface *get();

  size_t Send(uint8_t type, const uint8_t *data, size_t length);

  void OnFirmwareConfigured(uint8_t result);

 private:
  virtual ~VendorInterface() = default;

  bool Open(InitializeCompleteCallback initialize_complete_cb,
            PacketReadCallback packet_read_cb);
  void Close();

  void OnTimeout();

  void OnDataReady(int fd);

  void *lib_handle_;
  bt_vendor_interface_t *lib_interface_;
  AsyncFdWatcher fd_watcher_;
  int uart_fd_;
  PacketReadCallback packet_read_cb_;
  InitializeCompleteCallback initialize_complete_cb_;

  enum HciParserState { HCI_IDLE, HCI_TYPE_READY, HCI_PAYLOAD };
  HciParserState hci_parser_state_{HCI_IDLE};
  HciPacketType hci_packet_type_{HCI_PACKET_TYPE_UNKNOWN};
  uint8_t hci_packet_preamble_[HCI_PREAMBLE_SIZE_MAX];
  hidl_vec<uint8_t> hci_packet_;
  size_t hci_packet_bytes_remaining_;
  size_t hci_packet_bytes_read_;

  FirmwareStartupTimer *firmware_startup_timer_;
};

}  // namespace implementation
}  // namespace V1_0
}  // namespace bluetooth
}  // namespace hardware
}  // namespace android