You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
75 lines
2.1 KiB
75 lines
2.1 KiB
//
|
|
// Copyright 2017 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.
|
|
//
|
|
|
|
#include "hci_protocol.h"
|
|
|
|
#define LOG_TAG "android.hardware.bluetooth-hci-hci_protocol"
|
|
#include <android-base/logging.h>
|
|
#include <assert.h>
|
|
#include <fcntl.h>
|
|
#include <utils/Log.h>
|
|
|
|
namespace {
|
|
|
|
const size_t preamble_size_for_type[] = {
|
|
0, HCI_COMMAND_PREAMBLE_SIZE, HCI_ACL_PREAMBLE_SIZE, HCI_SCO_PREAMBLE_SIZE,
|
|
HCI_EVENT_PREAMBLE_SIZE};
|
|
const size_t packet_length_offset_for_type[] = {
|
|
0, HCI_LENGTH_OFFSET_CMD, HCI_LENGTH_OFFSET_ACL, HCI_LENGTH_OFFSET_SCO,
|
|
HCI_LENGTH_OFFSET_EVT};
|
|
|
|
size_t HciGetPacketLengthForType(HciPacketType type, const uint8_t* preamble) {
|
|
size_t offset = packet_length_offset_for_type[type];
|
|
if (type != HCI_PACKET_TYPE_ACL_DATA) return preamble[offset];
|
|
return (((preamble[offset + 1]) << 8) | preamble[offset]);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
namespace android {
|
|
namespace hardware {
|
|
namespace bluetooth {
|
|
namespace hci {
|
|
|
|
size_t HciProtocol::WriteSafely(int fd, const uint8_t* data, size_t length) {
|
|
size_t transmitted_length = 0;
|
|
while (length > 0) {
|
|
ssize_t ret =
|
|
TEMP_FAILURE_RETRY(write(fd, data + transmitted_length, length));
|
|
|
|
if (ret == -1) {
|
|
if (errno == EAGAIN) continue;
|
|
ALOGE("%s error writing to UART (%s)", __func__, strerror(errno));
|
|
break;
|
|
|
|
} else if (ret == 0) {
|
|
// Nothing written :(
|
|
ALOGE("%s zero bytes written - something went wrong...", __func__);
|
|
break;
|
|
}
|
|
|
|
transmitted_length += ret;
|
|
length -= ret;
|
|
}
|
|
|
|
return transmitted_length;
|
|
}
|
|
|
|
} // namespace hci
|
|
} // namespace bluetooth
|
|
} // namespace hardware
|
|
} // namespace android
|