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//
// 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.
//
#define LOG_TAG "android.hardware.bluetooth@1.0.hikey"
#include "bluetooth_hci.h"
#include <android-base/logging.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <unistd.h>
#include <utils/Log.h>
namespace android {
namespace hardware {
namespace bluetooth {
namespace V1_0 {
namespace hikey {
using android::hardware::hidl_vec;
BluetoothHci::BluetoothHci()
: deathRecipient(new BluetoothDeathRecipient(this)) {}
Return<void> BluetoothHci::initialize(
const ::android::sp<IBluetoothHciCallbacks>& cb) {
ALOGI("BluetoothHci::initialize()");
hci_tty_fd_ = open("/dev/hci_tty", O_RDWR);
if (hci_tty_fd_ < 0) {
ALOGE("%s: Can't open hci_tty (%s)", __func__, strerror(errno));
cb->initializationComplete(Status::INITIALIZATION_ERROR);
return Void();
}
event_cb_ = cb;
event_cb_->linkToDeath(deathRecipient, 0);
hci_ = new hci::H4Protocol(
hci_tty_fd_,
[cb](const hidl_vec<uint8_t>& packet) { cb->hciEventReceived(packet); },
[cb](const hidl_vec<uint8_t>& packet) { cb->aclDataReceived(packet); },
[cb](const hidl_vec<uint8_t>& packet) { cb->scoDataReceived(packet); });
// Use a socket pair to enforce the TI FIONREAD requirement.
int sockfd[2];
socketpair(AF_LOCAL, SOCK_STREAM, 0, sockfd);
int shim_fd = sockfd[0];
int for_hci = sockfd[1];
fd_watcher_.WatchFdForNonBlockingReads(hci_tty_fd_, [this, shim_fd](int fd) {
int tty_bytes = 0;
if (TEMP_FAILURE_RETRY(ioctl(fd, FIONREAD, &tty_bytes)))
ALOGE("%s:FIONREAD %s", __func__, strerror(errno));
ALOGV("%s:tty_bytes = %d", __func__, tty_bytes);
uint8_t* tmp_buffer = new uint8_t[tty_bytes];
size_t bytes_read = TEMP_FAILURE_RETRY(read(fd, tmp_buffer, tty_bytes));
CHECK(static_cast<int>(bytes_read) == tty_bytes);
size_t bytes_written =
TEMP_FAILURE_RETRY(write(shim_fd, tmp_buffer, tty_bytes));
CHECK(static_cast<int>(bytes_written) == tty_bytes);
delete[] tmp_buffer;
});
fd_watcher_.WatchFdForNonBlockingReads(
for_hci, [this](int fd) { hci_->OnDataReady(fd); });
cb->initializationComplete(Status::SUCCESS);
return Void();
}
Return<void> BluetoothHci::close() {
ALOGI("BluetoothHci::close()");
if (hci_tty_fd_ >= 0) {
fd_watcher_.StopWatchingFileDescriptors();
::close(hci_tty_fd_);
hci_tty_fd_ = -1;
}
event_cb_->unlinkToDeath(deathRecipient);
if (hci_ != nullptr) {
delete hci_;
hci_ = nullptr;
}
return Void();
}
Return<void> BluetoothHci::sendHciCommand(const hidl_vec<uint8_t>& packet) {
hci_->Send(HCI_PACKET_TYPE_COMMAND, packet.data(), packet.size());
return Void();
}
Return<void> BluetoothHci::sendAclData(const hidl_vec<uint8_t>& packet) {
hci_->Send(HCI_PACKET_TYPE_ACL_DATA, packet.data(), packet.size());
return Void();
}
Return<void> BluetoothHci::sendScoData(const hidl_vec<uint8_t>& packet) {
hci_->Send(HCI_PACKET_TYPE_SCO_DATA, packet.data(), packet.size());
return Void();
}
} // namespace hikey
} // namespace V1_0
} // namespace bluetooth
} // namespace hardware
} // namespace android
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