1 //
2 // Copyright 2017 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "h4_protocol.h"
18
19 #define LOG_TAG "android.hardware.bluetooth-hci-h4"
20 #include <android-base/logging.h>
21 #include <assert.h>
22 #include <fcntl.h>
23
24 namespace android {
25 namespace hardware {
26 namespace bluetooth {
27 namespace hci {
28
Send(uint8_t type,const uint8_t * data,size_t length)29 size_t H4Protocol::Send(uint8_t type, const uint8_t* data, size_t length) {
30 int rv = WriteSafely(uart_fd_, &type, sizeof(type));
31 if (rv == sizeof(type)) {
32 rv = WriteSafely(uart_fd_, data, length);
33 }
34 return rv;
35 }
36
OnPacketReady()37 void H4Protocol::OnPacketReady() {
38 switch (hci_packet_type_) {
39 case HCI_PACKET_TYPE_EVENT:
40 event_cb_(hci_packetizer_.GetPacket());
41 break;
42 case HCI_PACKET_TYPE_ACL_DATA:
43 acl_cb_(hci_packetizer_.GetPacket());
44 break;
45 case HCI_PACKET_TYPE_SCO_DATA:
46 sco_cb_(hci_packetizer_.GetPacket());
47 break;
48 default: {
49 bool bad_packet_type = true;
50 CHECK(!bad_packet_type);
51 }
52 }
53 // Get ready for the next type byte.
54 hci_packet_type_ = HCI_PACKET_TYPE_UNKNOWN;
55 }
56
OnDataReady(int fd)57 void H4Protocol::OnDataReady(int fd) {
58 if (hci_packet_type_ == HCI_PACKET_TYPE_UNKNOWN) {
59 uint8_t buffer[1] = {0};
60 size_t bytes_read = TEMP_FAILURE_RETRY(read(fd, buffer, 1));
61 CHECK(bytes_read == 1);
62 hci_packet_type_ = static_cast<HciPacketType>(buffer[0]);
63 } else {
64 hci_packetizer_.OnDataReady(fd, hci_packet_type_);
65 }
66 }
67
68 } // namespace hci
69 } // namespace bluetooth
70 } // namespace hardware
71 } // namespace android
72