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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 | #include "vendor_interface.h" | |
18 | ||
19 | #define LOG_TAG "android.hardware.bluetooth@1.0-impl" | |
20 | #include <cutils/properties.h> | |
21 | #include <utils/Log.h> | |
22 | ||
23 | #include <dlfcn.h> | |
24 | #include <fcntl.h> | |
25 | ||
26 | #include "bluetooth_address.h" | |
27 | #include "h4_protocol.h" | |
28 | #include "mct_protocol.h" | |
29 | ||
30 | static const char* VENDOR_LIBRARY_NAME = "libbt-vendor.so"; | |
31 | static const char* VENDOR_LIBRARY_SYMBOL_NAME = | |
32 | "BLUETOOTH_VENDOR_LIB_INTERFACE"; | |
33 | ||
34 | static const int INVALID_FD = -1; | |
35 | ||
36 | namespace { | |
37 | ||
38 | using android::hardware::bluetooth::V1_0::implementation::VendorInterface; | |
39 | using android::hardware::hidl_vec; | |
40 | ||
41 | struct { | |
42 | tINT_CMD_CBACK cb; | |
43 | uint16_t opcode; | |
44 | } internal_command; | |
45 | ||
46 | // True when LPM is not enabled yet or wake is not asserted. | |
47 | bool lpm_wake_deasserted; | |
48 | uint32_t lpm_timeout_ms; | |
49 | bool recent_activity_flag; | |
50 | ||
51 | VendorInterface* g_vendor_interface = nullptr; | |
52 | std::mutex wakeup_mutex_; | |
53 | ||
54 | HC_BT_HDR* WrapPacketAndCopy(uint16_t event, const hidl_vec<uint8_t>& data) { | |
55 | size_t packet_size = data.size() + sizeof(HC_BT_HDR); | |
56 | HC_BT_HDR* packet = reinterpret_cast<HC_BT_HDR*>(new uint8_t[packet_size]); | |
57 | packet->offset = 0; | |
58 | packet->len = data.size(); | |
59 | packet->layer_specific = 0; | |
60 | packet->event = event; | |
61 | // TODO(eisenbach): Avoid copy here; if BT_HDR->data can be ensured to | |
62 | // be the only way the data is accessed, a pointer could be passed here... | |
63 | memcpy(packet->data, data.data(), data.size()); | |
64 | return packet; | |
65 | } | |
66 | ||
67 | bool internal_command_event_match(const hidl_vec<uint8_t>& packet) { | |
68 | uint8_t event_code = packet[0]; | |
69 | if (event_code != HCI_COMMAND_COMPLETE_EVENT) { | |
70 | ALOGE("%s: Unhandled event type %02X", __func__, event_code); | |
71 | return false; | |
72 | } | |
73 | ||
74 | size_t opcode_offset = HCI_EVENT_PREAMBLE_SIZE + 1; // Skip num packets. | |
75 | ||
76 | uint16_t opcode = packet[opcode_offset] | (packet[opcode_offset + 1] << 8); | |
77 | ||
78 | ALOGV("%s internal_command.opcode = %04X opcode = %04x", __func__, | |
79 | internal_command.opcode, opcode); | |
80 | return opcode == internal_command.opcode; | |
81 | } | |
82 | ||
83 | uint8_t transmit_cb(uint16_t opcode, void* buffer, tINT_CMD_CBACK callback) { | |
84 | ALOGV("%s opcode: 0x%04x, ptr: %p, cb: %p", __func__, opcode, buffer, | |
85 | callback); | |
86 | internal_command.cb = callback; | |
87 | internal_command.opcode = opcode; | |
88 | uint8_t type = HCI_PACKET_TYPE_COMMAND; | |
89 | HC_BT_HDR* bt_hdr = reinterpret_cast<HC_BT_HDR*>(buffer); | |
90 | VendorInterface::get()->Send(type, bt_hdr->data, bt_hdr->len); | |
91 | delete[] reinterpret_cast<uint8_t*>(buffer); | |
92 | return true; | |
93 | } | |
94 | ||
95 | void firmware_config_cb(bt_vendor_op_result_t result) { | |
96 | ALOGV("%s result: %d", __func__, result); | |
97 | VendorInterface::get()->OnFirmwareConfigured(result); | |
98 | } | |
99 | ||
100 | void sco_config_cb(bt_vendor_op_result_t result) { | |
101 | ALOGD("%s result: %d", __func__, result); | |
102 | } | |
103 | ||
104 | void low_power_mode_cb(bt_vendor_op_result_t result) { | |
105 | ALOGD("%s result: %d", __func__, result); | |
106 | } | |
107 | ||
108 | void sco_audiostate_cb(bt_vendor_op_result_t result) { | |
109 | ALOGD("%s result: %d", __func__, result); | |
110 | } | |
111 | ||
112 | void* buffer_alloc_cb(int size) { | |
113 | void* p = new uint8_t[size]; | |
114 | ALOGV("%s pts: %p, size: %d", __func__, p, size); | |
115 | return p; | |
116 | } | |
117 | ||
118 | void buffer_free_cb(void* buffer) { | |
119 | ALOGV("%s ptr: %p", __func__, buffer); | |
120 | delete[] reinterpret_cast<uint8_t*>(buffer); | |
121 | } | |
122 | ||
123 | void epilog_cb(bt_vendor_op_result_t result) { | |
124 | ALOGD("%s result: %d", __func__, result); | |
125 | } | |
126 | ||
127 | void a2dp_offload_cb(bt_vendor_op_result_t result, bt_vendor_opcode_t op, | |
128 | uint8_t av_handle) { | |
129 | ALOGD("%s result: %d, op: %d, handle: %d", __func__, result, op, av_handle); | |
130 | } | |
131 | ||
132 | const bt_vendor_callbacks_t lib_callbacks = { | |
133 | sizeof(lib_callbacks), firmware_config_cb, sco_config_cb, | |
134 | low_power_mode_cb, sco_audiostate_cb, buffer_alloc_cb, | |
135 | buffer_free_cb, transmit_cb, epilog_cb, | |
136 | a2dp_offload_cb}; | |
137 | ||
138 | } // namespace | |
139 | ||
140 | namespace android { | |
141 | namespace hardware { | |
142 | namespace bluetooth { | |
143 | namespace V1_0 { | |
144 | namespace implementation { | |
145 | ||
146 | class FirmwareStartupTimer { | |
147 | public: | |
148 | FirmwareStartupTimer() : start_time_(std::chrono::steady_clock::now()) {} | |
149 | ||
150 | ~FirmwareStartupTimer() { | |
151 | std::chrono::duration<double> duration = | |
152 | std::chrono::steady_clock::now() - start_time_; | |
153 | double s = duration.count(); | |
154 | if (s == 0) return; | |
155 | ALOGI("Firmware configured in %.3fs", s); | |
156 | } | |
157 | ||
158 | private: | |
159 | std::chrono::steady_clock::time_point start_time_; | |
160 | }; | |
161 | ||
162 | bool VendorInterface::Initialize( | |
163 | InitializeCompleteCallback initialize_complete_cb, | |
164 | PacketReadCallback event_cb, PacketReadCallback acl_cb, | |
84a2b381 | 165 | PacketReadCallback sco_cb, PacketReadCallback iso_cb) { |
8d217709 L |
166 | if (g_vendor_interface) { |
167 | ALOGE("%s: No previous Shutdown()?", __func__); | |
168 | return false; | |
169 | } | |
170 | g_vendor_interface = new VendorInterface(); | |
171 | return g_vendor_interface->Open(initialize_complete_cb, event_cb, acl_cb, | |
84a2b381 | 172 | sco_cb, iso_cb); |
8d217709 L |
173 | } |
174 | ||
175 | void VendorInterface::Shutdown() { | |
176 | LOG_ALWAYS_FATAL_IF(!g_vendor_interface, "%s: No Vendor interface!", | |
177 | __func__); | |
178 | g_vendor_interface->Close(); | |
179 | delete g_vendor_interface; | |
180 | g_vendor_interface = nullptr; | |
181 | } | |
182 | ||
183 | VendorInterface* VendorInterface::get() { return g_vendor_interface; } | |
184 | ||
185 | bool VendorInterface::Open(InitializeCompleteCallback initialize_complete_cb, | |
186 | PacketReadCallback event_cb, | |
187 | PacketReadCallback acl_cb, | |
84a2b381 JP |
188 | PacketReadCallback sco_cb, |
189 | PacketReadCallback iso_cb) { | |
8d217709 L |
190 | initialize_complete_cb_ = initialize_complete_cb; |
191 | ||
192 | // Initialize vendor interface | |
193 | ||
194 | lib_handle_ = dlopen(VENDOR_LIBRARY_NAME, RTLD_NOW); | |
195 | if (!lib_handle_) { | |
196 | ALOGE("%s unable to open %s (%s)", __func__, VENDOR_LIBRARY_NAME, | |
197 | dlerror()); | |
198 | return false; | |
199 | } | |
200 | ||
201 | lib_interface_ = reinterpret_cast<bt_vendor_interface_t*>( | |
202 | dlsym(lib_handle_, VENDOR_LIBRARY_SYMBOL_NAME)); | |
203 | if (!lib_interface_) { | |
204 | ALOGE("%s unable to find symbol %s in %s (%s)", __func__, | |
205 | VENDOR_LIBRARY_SYMBOL_NAME, VENDOR_LIBRARY_NAME, dlerror()); | |
206 | return false; | |
207 | } | |
208 | ||
209 | // Get the local BD address | |
210 | ||
211 | uint8_t local_bda[BluetoothAddress::kBytes]; | |
212 | if (!BluetoothAddress::get_local_address(local_bda)) { | |
213 | LOG_ALWAYS_FATAL("%s: No Bluetooth Address!", __func__); | |
214 | } | |
215 | int status = lib_interface_->init(&lib_callbacks, (unsigned char*)local_bda); | |
216 | if (status) { | |
217 | ALOGE("%s unable to initialize vendor library: %d", __func__, status); | |
218 | return false; | |
219 | } | |
220 | ||
221 | ALOGD("%s vendor library loaded", __func__); | |
222 | ||
223 | // Power on the controller | |
224 | ||
225 | int power_state = BT_VND_PWR_ON; | |
226 | lib_interface_->op(BT_VND_OP_POWER_CTRL, &power_state); | |
227 | ||
228 | // Get the UART socket(s) | |
229 | ||
230 | int fd_list[CH_MAX] = {0}; | |
231 | int fd_count = lib_interface_->op(BT_VND_OP_USERIAL_OPEN, &fd_list); | |
232 | ||
233 | if (fd_count < 1 || fd_count > CH_MAX - 1) { | |
234 | ALOGE("%s: fd_count %d is invalid!", __func__, fd_count); | |
235 | return false; | |
236 | } | |
237 | ||
238 | for (int i = 0; i < fd_count; i++) { | |
239 | if (fd_list[i] == INVALID_FD) { | |
240 | ALOGE("%s: fd %d is invalid!", __func__, fd_list[i]); | |
241 | return false; | |
242 | } | |
243 | } | |
244 | ||
245 | event_cb_ = event_cb; | |
246 | PacketReadCallback intercept_events = [this](const hidl_vec<uint8_t>& event) { | |
247 | HandleIncomingEvent(event); | |
248 | }; | |
249 | ||
250 | if (fd_count == 1) { | |
251 | hci::H4Protocol* h4_hci = | |
84a2b381 | 252 | new hci::H4Protocol(fd_list[0], intercept_events, acl_cb, sco_cb, iso_cb); |
8d217709 L |
253 | fd_watcher_.WatchFdForNonBlockingReads( |
254 | fd_list[0], [h4_hci](int fd) { h4_hci->OnDataReady(fd); }); | |
255 | hci_ = h4_hci; | |
256 | } else { | |
257 | hci::MctProtocol* mct_hci = | |
258 | new hci::MctProtocol(fd_list, intercept_events, acl_cb); | |
259 | fd_watcher_.WatchFdForNonBlockingReads( | |
260 | fd_list[CH_EVT], [mct_hci](int fd) { mct_hci->OnEventDataReady(fd); }); | |
261 | fd_watcher_.WatchFdForNonBlockingReads( | |
262 | fd_list[CH_ACL_IN], | |
263 | [mct_hci](int fd) { mct_hci->OnAclDataReady(fd); }); | |
264 | hci_ = mct_hci; | |
265 | } | |
266 | ||
267 | // Initially, the power management is off. | |
268 | lpm_wake_deasserted = true; | |
269 | ||
270 | // Start configuring the firmware | |
271 | firmware_startup_timer_ = new FirmwareStartupTimer(); | |
272 | lib_interface_->op(BT_VND_OP_FW_CFG, nullptr); | |
273 | ||
274 | return true; | |
275 | } | |
276 | ||
277 | void VendorInterface::Close() { | |
278 | // These callbacks may send HCI events (vendor-dependent), so make sure to | |
279 | // StopWatching the file descriptor after this. | |
280 | if (lib_interface_ != nullptr) { | |
281 | bt_vendor_lpm_mode_t mode = BT_VND_LPM_DISABLE; | |
282 | lib_interface_->op(BT_VND_OP_LPM_SET_MODE, &mode); | |
283 | } | |
284 | ||
285 | fd_watcher_.StopWatchingFileDescriptors(); | |
286 | ||
287 | if (hci_ != nullptr) { | |
288 | delete hci_; | |
289 | hci_ = nullptr; | |
290 | } | |
291 | ||
292 | if (lib_interface_ != nullptr) { | |
293 | lib_interface_->op(BT_VND_OP_USERIAL_CLOSE, nullptr); | |
294 | ||
295 | int power_state = BT_VND_PWR_OFF; | |
296 | lib_interface_->op(BT_VND_OP_POWER_CTRL, &power_state); | |
297 | ||
298 | lib_interface_->cleanup(); | |
299 | } | |
300 | ||
301 | if (lib_handle_ != nullptr) { | |
302 | dlclose(lib_handle_); | |
303 | lib_handle_ = nullptr; | |
304 | } | |
305 | ||
306 | if (firmware_startup_timer_ != nullptr) { | |
307 | delete firmware_startup_timer_; | |
308 | firmware_startup_timer_ = nullptr; | |
309 | } | |
310 | } | |
311 | ||
312 | size_t VendorInterface::Send(uint8_t type, const uint8_t* data, size_t length) { | |
313 | std::unique_lock<std::mutex> lock(wakeup_mutex_); | |
314 | recent_activity_flag = true; | |
315 | ||
316 | if (lpm_wake_deasserted == true) { | |
317 | // Restart the timer. | |
318 | fd_watcher_.ConfigureTimeout(std::chrono::milliseconds(lpm_timeout_ms), | |
319 | [this]() { OnTimeout(); }); | |
320 | // Assert wake. | |
321 | lpm_wake_deasserted = false; | |
322 | bt_vendor_lpm_wake_state_t wakeState = BT_VND_LPM_WAKE_ASSERT; | |
323 | lib_interface_->op(BT_VND_OP_LPM_WAKE_SET_STATE, &wakeState); | |
324 | ALOGV("%s: Sent wake before (%02x)", __func__, data[0] | (data[1] << 8)); | |
325 | } | |
326 | ||
327 | return hci_->Send(type, data, length); | |
328 | } | |
329 | ||
330 | void VendorInterface::OnFirmwareConfigured(uint8_t result) { | |
331 | ALOGD("%s result: %d", __func__, result); | |
332 | ||
333 | if (firmware_startup_timer_ != nullptr) { | |
334 | delete firmware_startup_timer_; | |
335 | firmware_startup_timer_ = nullptr; | |
336 | } | |
337 | ||
338 | if (initialize_complete_cb_ != nullptr) { | |
339 | initialize_complete_cb_(result == 0); | |
340 | initialize_complete_cb_ = nullptr; | |
341 | } | |
342 | ||
cc94a77a | 343 | lib_interface_->op(BT_VND_OP_SCO_CFG, nullptr); |
344 | ||
8d217709 L |
345 | lib_interface_->op(BT_VND_OP_GET_LPM_IDLE_TIMEOUT, &lpm_timeout_ms); |
346 | ALOGI("%s: lpm_timeout_ms %d", __func__, lpm_timeout_ms); | |
347 | ||
348 | bt_vendor_lpm_mode_t mode = BT_VND_LPM_ENABLE; | |
349 | lib_interface_->op(BT_VND_OP_LPM_SET_MODE, &mode); | |
350 | ||
351 | ALOGD("%s Calling StartLowPowerWatchdog()", __func__); | |
352 | fd_watcher_.ConfigureTimeout(std::chrono::milliseconds(lpm_timeout_ms), | |
353 | [this]() { OnTimeout(); }); | |
354 | } | |
355 | ||
356 | void VendorInterface::OnTimeout() { | |
357 | ALOGV("%s", __func__); | |
358 | std::unique_lock<std::mutex> lock(wakeup_mutex_); | |
359 | if (recent_activity_flag == false) { | |
360 | lpm_wake_deasserted = true; | |
361 | bt_vendor_lpm_wake_state_t wakeState = BT_VND_LPM_WAKE_DEASSERT; | |
362 | lib_interface_->op(BT_VND_OP_LPM_WAKE_SET_STATE, &wakeState); | |
363 | fd_watcher_.ConfigureTimeout(std::chrono::seconds(0), []() { | |
364 | ALOGE("Zero timeout! Should never happen."); | |
365 | }); | |
366 | } | |
367 | recent_activity_flag = false; | |
368 | } | |
369 | ||
370 | void VendorInterface::HandleIncomingEvent(const hidl_vec<uint8_t>& hci_packet) { | |
371 | if (internal_command.cb != nullptr && | |
372 | internal_command_event_match(hci_packet)) { | |
373 | HC_BT_HDR* bt_hdr = WrapPacketAndCopy(HCI_PACKET_TYPE_EVENT, hci_packet); | |
374 | ||
375 | // The callbacks can send new commands, so don't zero after calling. | |
376 | tINT_CMD_CBACK saved_cb = internal_command.cb; | |
377 | internal_command.cb = nullptr; | |
378 | saved_cb(bt_hdr); | |
379 | } else { | |
380 | event_cb_(hci_packet); | |
381 | } | |
382 | } | |
383 | ||
384 | } // namespace implementation | |
385 | } // namespace V1_0 | |
386 | } // namespace bluetooth | |
387 | } // namespace hardware | |
388 | } // namespace android |