1 //
2 // Copyright 2016 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 #define LOG_TAG "android.hardware.bluetooth@1.0.hikey"
18
19 #include "bluetooth_hci.h"
20
21 #include <android-base/logging.h>
22 #include <sys/ioctl.h>
23 #include <sys/socket.h>
24 #include <unistd.h>
25 #include <utils/Log.h>
26
27 namespace android {
28 namespace hardware {
29 namespace bluetooth {
30 namespace V1_0 {
31 namespace hikey {
32
33 using android::hardware::hidl_vec;
34
BluetoothHci()35 BluetoothHci::BluetoothHci()
36 : deathRecipient(new BluetoothDeathRecipient(this)) {}
37
initialize(const::android::sp<IBluetoothHciCallbacks> & cb)38 Return<void> BluetoothHci::initialize(
39 const ::android::sp<IBluetoothHciCallbacks>& cb) {
40 ALOGI("BluetoothHci::initialize()");
41
42 hci_tty_fd_ = open("/dev/hci_tty", O_RDWR);
43 if (hci_tty_fd_ < 0) {
44 ALOGE("%s: Can't open hci_tty (%s)", __func__, strerror(errno));
45 cb->initializationComplete(Status::INITIALIZATION_ERROR);
46 return Void();
47 }
48
49 event_cb_ = cb;
50 event_cb_->linkToDeath(deathRecipient, 0);
51
52 hci_ = new hci::H4Protocol(
53 hci_tty_fd_,
54 [cb](const hidl_vec<uint8_t>& packet) { cb->hciEventReceived(packet); },
55 [cb](const hidl_vec<uint8_t>& packet) { cb->aclDataReceived(packet); },
56 [cb](const hidl_vec<uint8_t>& packet) { cb->scoDataReceived(packet); });
57
58 // Use a socket pair to enforce the TI FIONREAD requirement.
59 int sockfd[2];
60 socketpair(AF_LOCAL, SOCK_STREAM, 0, sockfd);
61 int shim_fd = sockfd[0];
62 int for_hci = sockfd[1];
63
64 fd_watcher_.WatchFdForNonBlockingReads(hci_tty_fd_, [this, shim_fd](int fd) {
65 int tty_bytes = 0;
66 if (TEMP_FAILURE_RETRY(ioctl(fd, FIONREAD, &tty_bytes)))
67 ALOGE("%s:FIONREAD %s", __func__, strerror(errno));
68 ALOGV("%s:tty_bytes = %d", __func__, tty_bytes);
69
70 uint8_t* tmp_buffer = new uint8_t[tty_bytes];
71 size_t bytes_read = TEMP_FAILURE_RETRY(read(fd, tmp_buffer, tty_bytes));
72 CHECK(static_cast<int>(bytes_read) == tty_bytes);
73 size_t bytes_written =
74 TEMP_FAILURE_RETRY(write(shim_fd, tmp_buffer, tty_bytes));
75 CHECK(static_cast<int>(bytes_written) == tty_bytes);
76 delete[] tmp_buffer;
77 });
78
79 fd_watcher_.WatchFdForNonBlockingReads(
80 for_hci, [this](int fd) { hci_->OnDataReady(fd); });
81
82 cb->initializationComplete(Status::SUCCESS);
83 return Void();
84 }
85
close()86 Return<void> BluetoothHci::close() {
87 ALOGI("BluetoothHci::close()");
88
89 if (hci_tty_fd_ >= 0) {
90 fd_watcher_.StopWatchingFileDescriptors();
91 ::close(hci_tty_fd_);
92 hci_tty_fd_ = -1;
93 }
94
95 event_cb_->unlinkToDeath(deathRecipient);
96
97 if (hci_ != nullptr) {
98 delete hci_;
99 hci_ = nullptr;
100 }
101
102 return Void();
103 }
104
sendHciCommand(const hidl_vec<uint8_t> & packet)105 Return<void> BluetoothHci::sendHciCommand(const hidl_vec<uint8_t>& packet) {
106 hci_->Send(HCI_PACKET_TYPE_COMMAND, packet.data(), packet.size());
107 return Void();
108 }
109
sendAclData(const hidl_vec<uint8_t> & packet)110 Return<void> BluetoothHci::sendAclData(const hidl_vec<uint8_t>& packet) {
111 hci_->Send(HCI_PACKET_TYPE_ACL_DATA, packet.data(), packet.size());
112 return Void();
113 }
114
sendScoData(const hidl_vec<uint8_t> & packet)115 Return<void> BluetoothHci::sendScoData(const hidl_vec<uint8_t>& packet) {
116 hci_->Send(HCI_PACKET_TYPE_SCO_DATA, packet.data(), packet.size());
117 return Void();
118 }
119
120 } // namespace hikey
121 } // namespace V1_0
122 } // namespace bluetooth
123 } // namespace hardware
124 } // namespace android
125