1 /*
2 * Copyright (C) 2018 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.usb.gadget@1.0-service.wahoo"
18
19 #include "UsbGadget.h"
20 #include <dirent.h>
21 #include <fcntl.h>
22 #include <stdio.h>
23 #include <sys/inotify.h>
24 #include <sys/mount.h>
25 #include <sys/stat.h>
26 #include <sys/types.h>
27 #include <unistd.h>
28
29 constexpr int BUFFER_SIZE = 512;
30 constexpr int MAX_FILE_PATH_LENGTH = 256;
31 constexpr int EPOLL_EVENTS = 10;
32 constexpr bool DEBUG = false;
33 constexpr int DISCONNECT_WAIT_US = 100000;
34
35 #define BUILD_TYPE "ro.build.type"
36 #define GADGET_PATH "/config/usb_gadget/g1/"
37 #define PULLUP_PATH GADGET_PATH "UDC"
38 #define GADGET_NAME "a800000.dwc3"
39 #define PERSISTENT_BOOT_MODE "ro.bootmode"
40 #define VENDOR_ID_PATH GADGET_PATH "idVendor"
41 #define PRODUCT_ID_PATH GADGET_PATH "idProduct"
42 #define DEVICE_CLASS_PATH GADGET_PATH "bDeviceClass"
43 #define DEVICE_SUB_CLASS_PATH GADGET_PATH "bDeviceSubClass"
44 #define DEVICE_PROTOCOL_PATH GADGET_PATH "bDeviceProtocol"
45 #define DESC_USE_PATH GADGET_PATH "os_desc/use"
46 #define OS_DESC_PATH GADGET_PATH "os_desc/b.1"
47 #define CONFIG_PATH GADGET_PATH "configs/b.1/"
48 #define FUNCTIONS_PATH GADGET_PATH "functions/"
49 #define FUNCTION_NAME "function"
50 #define FUNCTION_PATH CONFIG_PATH FUNCTION_NAME
51 #define RNDIS_PATH FUNCTIONS_PATH "gsi.rndis"
52
53 #define PERSISTENT_VENDOR_CONFIG "persist.vendor.usb.usbradio.config"
54 #define VENDOR_CONFIG "vendor.usb.config"
55
56 namespace android {
57 namespace hardware {
58 namespace usb {
59 namespace gadget {
60 namespace V1_0 {
61 namespace implementation {
62
63 volatile bool gadgetPullup;
64
65 // Used for debug.
displayInotifyEvent(struct inotify_event * i)66 static void displayInotifyEvent(struct inotify_event *i) {
67 ALOGE(" wd =%2d; ", i->wd);
68 if (i->cookie > 0) ALOGE("cookie =%4d; ", i->cookie);
69
70 ALOGE("mask = ");
71 if (i->mask & IN_ACCESS) ALOGE("IN_ACCESS ");
72 if (i->mask & IN_ATTRIB) ALOGE("IN_ATTRIB ");
73 if (i->mask & IN_CLOSE_NOWRITE) ALOGE("IN_CLOSE_NOWRITE ");
74 if (i->mask & IN_CLOSE_WRITE) ALOGE("IN_CLOSE_WRITE ");
75 if (i->mask & IN_CREATE) ALOGE("IN_CREATE ");
76 if (i->mask & IN_DELETE) ALOGE("IN_DELETE ");
77 if (i->mask & IN_DELETE_SELF) ALOGE("IN_DELETE_SELF ");
78 if (i->mask & IN_IGNORED) ALOGE("IN_IGNORED ");
79 if (i->mask & IN_ISDIR) ALOGE("IN_ISDIR ");
80 if (i->mask & IN_MODIFY) ALOGE("IN_MODIFY ");
81 if (i->mask & IN_MOVE_SELF) ALOGE("IN_MOVE_SELF ");
82 if (i->mask & IN_MOVED_FROM) ALOGE("IN_MOVED_FROM ");
83 if (i->mask & IN_MOVED_TO) ALOGE("IN_MOVED_TO ");
84 if (i->mask & IN_OPEN) ALOGE("IN_OPEN ");
85 if (i->mask & IN_Q_OVERFLOW) ALOGE("IN_Q_OVERFLOW ");
86 if (i->mask & IN_UNMOUNT) ALOGE("IN_UNMOUNT ");
87 ALOGE("\n");
88
89 if (i->len > 0) ALOGE(" name = %s\n", i->name);
90 }
91
monitorFfs(void * param)92 static void *monitorFfs(void *param) {
93 UsbGadget *usbGadget = (UsbGadget *)param;
94 char buf[BUFFER_SIZE];
95 bool writeUdc = true, stopMonitor = false;
96 struct epoll_event events[EPOLL_EVENTS];
97
98 bool descriptorWritten = true;
99 for (int i = 0; i < static_cast<int>(usbGadget->mEndpointList.size()); i++) {
100 if (access(usbGadget->mEndpointList.at(i).c_str(), R_OK)) {
101 descriptorWritten = false;
102 break;
103 }
104 }
105
106 // notify here if the endpoints are already present.
107 if (descriptorWritten && !!WriteStringToFile(GADGET_NAME, PULLUP_PATH)) {
108 lock_guard<mutex> lock(usbGadget->mLock);
109 usbGadget->mCurrentUsbFunctionsApplied = true;
110 gadgetPullup = true;
111 usbGadget->mCv.notify_all();
112 }
113
114 while (!stopMonitor) {
115 int nrEvents = epoll_wait(usbGadget->mEpollFd, events, EPOLL_EVENTS, -1);
116 if (nrEvents <= 0) {
117 ALOGE("epoll wait did not return descriptor number");
118 continue;
119 }
120
121 for (int i = 0; i < nrEvents; i++) {
122 ALOGI("event=%u on fd=%d\n", events[i].events, events[i].data.fd);
123
124 if (events[i].data.fd == usbGadget->mInotifyFd) {
125 // Process all of the events in buffer returned by read().
126 int numRead = read(usbGadget->mInotifyFd, buf, BUFFER_SIZE);
127 for (char *p = buf; p < buf + numRead;) {
128 struct inotify_event *event = (struct inotify_event *)p;
129 if (DEBUG) displayInotifyEvent(event);
130
131 p += sizeof(struct inotify_event) + event->len;
132
133 bool descriptorPresent = true;
134 for (int j = 0; j < static_cast<int>(usbGadget->mEndpointList.size());
135 j++) {
136 if (access(usbGadget->mEndpointList.at(j).c_str(), R_OK)) {
137 if (DEBUG)
138 ALOGI("%s absent", usbGadget->mEndpointList.at(j).c_str());
139 descriptorPresent = false;
140 break;
141 }
142 }
143
144 if (!descriptorPresent && !writeUdc) {
145 if (DEBUG) ALOGI("endpoints not up");
146 writeUdc = true;
147 } else if (descriptorPresent && writeUdc &&
148 !!WriteStringToFile(GADGET_NAME, PULLUP_PATH)) {
149 lock_guard<mutex> lock(usbGadget->mLock);
150 usbGadget->mCurrentUsbFunctionsApplied = true;
151 ALOGI("GADGET pulled up");
152 writeUdc = false;
153 gadgetPullup = true;
154 // notify the main thread to signal userspace.
155 usbGadget->mCv.notify_all();
156 }
157 }
158 } else {
159 uint64_t flag;
160 read(usbGadget->mEventFd, &flag, sizeof(flag));
161 if (flag == 100) {
162 stopMonitor = true;
163 break;
164 }
165 }
166 }
167 }
168 return NULL;
169 }
170
UsbGadget()171 UsbGadget::UsbGadget()
172 : mMonitorCreated(false), mCurrentUsbFunctionsApplied(false) {
173 if (access(OS_DESC_PATH, R_OK) != 0) ALOGE("configfs setup not done yet");
174 }
175
unlinkFunctions(const char * path)176 static int unlinkFunctions(const char *path) {
177 DIR *config = opendir(path);
178 struct dirent *function;
179 char filepath[MAX_FILE_PATH_LENGTH];
180 int ret = 0;
181
182 if (config == NULL) return -1;
183
184 // d_type does not seems to be supported in /config
185 // so filtering by name.
186 while (((function = readdir(config)) != NULL)) {
187 if ((strstr(function->d_name, FUNCTION_NAME) == NULL)) continue;
188 // build the path for each file in the folder.
189 sprintf(filepath, "%s/%s", path, function->d_name);
190 ret = remove(filepath);
191 if (ret) {
192 ALOGE("Unable remove file %s errno:%d", filepath, errno);
193 break;
194 }
195 }
196
197 closedir(config);
198 return ret;
199 }
200
addEpollFd(const unique_fd & epfd,const unique_fd & fd)201 static int addEpollFd(const unique_fd &epfd, const unique_fd &fd) {
202 struct epoll_event event;
203 int ret;
204
205 event.data.fd = fd;
206 event.events = EPOLLIN;
207
208 ret = epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &event);
209 if (ret) ALOGE("epoll_ctl error %d", errno);
210
211 return ret;
212 }
213
getCurrentUsbFunctions(const sp<V1_0::IUsbGadgetCallback> & callback)214 Return<void> UsbGadget::getCurrentUsbFunctions(
215 const sp<V1_0::IUsbGadgetCallback> &callback) {
216 Return<void> ret = callback->getCurrentUsbFunctionsCb(
217 mCurrentUsbFunctions, mCurrentUsbFunctionsApplied
218 ? Status::FUNCTIONS_APPLIED
219 : Status::FUNCTIONS_NOT_APPLIED);
220 if (!ret.isOk())
221 ALOGE("Call to getCurrentUsbFunctionsCb failed %s",
222 ret.description().c_str());
223
224 return Void();
225 }
226
tearDownGadget()227 V1_0::Status UsbGadget::tearDownGadget() {
228 ALOGI("setCurrentUsbFunctions None");
229
230 if (!WriteStringToFile("none", PULLUP_PATH))
231 ALOGI("Gadget cannot be pulled down");
232
233 if (!WriteStringToFile("0", DEVICE_CLASS_PATH)) return Status::ERROR;
234
235 if (!WriteStringToFile("0", DEVICE_SUB_CLASS_PATH)) return Status::ERROR;
236
237 if (!WriteStringToFile("0", DEVICE_PROTOCOL_PATH)) return Status::ERROR;
238
239 if (!WriteStringToFile("0", DESC_USE_PATH)) return Status::ERROR;
240
241 if (unlinkFunctions(CONFIG_PATH)) return Status::ERROR;
242
243 if (mMonitorCreated) {
244 uint64_t flag = 100;
245 // Stop the monitor thread by writing into signal fd.
246 write(mEventFd, &flag, sizeof(flag));
247 mMonitor->join();
248 mMonitorCreated = false;
249 ALOGI("mMonitor destroyed");
250 } else {
251 ALOGI("mMonitor not running");
252 }
253
254 mInotifyFd.reset(-1);
255 mEventFd.reset(-1);
256 mEpollFd.reset(-1);
257 mEndpointList.clear();
258 return Status::SUCCESS;
259 }
260
linkFunction(const char * function,int index)261 static int linkFunction(const char *function, int index) {
262 char functionPath[MAX_FILE_PATH_LENGTH];
263 char link[MAX_FILE_PATH_LENGTH];
264
265 sprintf(functionPath, "%s%s", FUNCTIONS_PATH, function);
266 sprintf(link, "%s%d", FUNCTION_PATH, index);
267 if (symlink(functionPath, link)) {
268 ALOGE("Cannot create symlink %s -> %s errno:%d", link, functionPath, errno);
269 return -1;
270 }
271 return 0;
272 }
273
setVidPid(const char * vid,const char * pid)274 static V1_0::Status setVidPid(const char *vid, const char *pid) {
275 if (!WriteStringToFile(vid, VENDOR_ID_PATH)) return Status::ERROR;
276
277 if (!WriteStringToFile(pid, PRODUCT_ID_PATH)) return Status::ERROR;
278
279 return Status::SUCCESS;
280 }
281
getVendorFunctions()282 static std::string getVendorFunctions() {
283 if (GetProperty(BUILD_TYPE, "") == "user") return "user";
284
285 std::string bootMode = GetProperty(PERSISTENT_BOOT_MODE, "");
286 std::string persistVendorFunctions =
287 GetProperty(PERSISTENT_VENDOR_CONFIG, "");
288 std::string vendorFunctions = GetProperty(VENDOR_CONFIG, "");
289 std::string ret = "";
290
291 if (vendorFunctions != "") {
292 ret = vendorFunctions;
293 } else if (bootMode == "usbradio") {
294 if (persistVendorFunctions != "")
295 ret = persistVendorFunctions;
296 else
297 ret = "diag";
298 // vendor.usb.config will reflect the current configured functions
299 SetProperty(VENDOR_CONFIG, ret);
300 }
301
302 return ret;
303 }
304
validateAndSetVidPid(uint64_t functions)305 static V1_0::Status validateAndSetVidPid(uint64_t functions) {
306 V1_0::Status ret = Status::SUCCESS;
307 std::string vendorFunctions = getVendorFunctions();
308
309 switch (functions) {
310 case static_cast<uint64_t>(GadgetFunction::MTP):
311 if (vendorFunctions == "diag") {
312 ret = setVidPid("0x05C6", "0x901B");
313 } else {
314 if (!(vendorFunctions == "user" || vendorFunctions == ""))
315 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
316 ret = setVidPid("0x18d1", "0x4ee1");
317 }
318 break;
319 case GadgetFunction::ADB | GadgetFunction::MTP:
320 if (vendorFunctions == "diag") {
321 ret = setVidPid("0x05C6", "0x903A");
322 } else {
323 if (!(vendorFunctions == "user" || vendorFunctions == ""))
324 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
325 ret = setVidPid("0x18d1", "0x4ee2");
326 }
327 break;
328 case static_cast<uint64_t>(GadgetFunction::RNDIS):
329 if (vendorFunctions == "diag") {
330 ret = setVidPid("0x05C6", "0x902C");
331 } else if (vendorFunctions == "serial_cdev,diag") {
332 ret = setVidPid("0x05C6", "0x90B5");
333 } else {
334 if (!(vendorFunctions == "user" || vendorFunctions == ""))
335 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
336 ret = setVidPid("0x18d1", "0x4ee3");
337 }
338 break;
339 case GadgetFunction::ADB | GadgetFunction::RNDIS:
340 if (vendorFunctions == "diag") {
341 ret = setVidPid("0x05C6", "0x902D");
342 } else if (vendorFunctions == "serial_cdev,diag") {
343 ret = setVidPid("0x05C6", "0x90B6");
344 } else {
345 if (!(vendorFunctions == "user" || vendorFunctions == ""))
346 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
347 ret = setVidPid("0x18d1", "0x4ee4");
348 }
349 break;
350 case static_cast<uint64_t>(GadgetFunction::PTP):
351 if (!(vendorFunctions == "user" || vendorFunctions == ""))
352 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
353 ret = setVidPid("0x18d1", "0x4ee5");
354 break;
355 case GadgetFunction::ADB | GadgetFunction::PTP:
356 if (!(vendorFunctions == "user" || vendorFunctions == ""))
357 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
358 ret = setVidPid("0x18d1", "0x4ee6");
359 break;
360 case static_cast<uint64_t>(GadgetFunction::ADB):
361 if (vendorFunctions == "diag") {
362 ret = setVidPid("0x05C6", "0x901D");
363 } else if (vendorFunctions == "diag,serial_cdev,rmnet_gsi") {
364 ret = setVidPid("0x05C6", "0x9091");
365 } else if (vendorFunctions == "diag,serial_cdev") {
366 ret = setVidPid("0x05C6", "0x901F");
367 } else {
368 if (!(vendorFunctions == "user" || vendorFunctions == ""))
369 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
370 ret = setVidPid("0x18d1", "0x4ee7");
371 }
372 break;
373 case static_cast<uint64_t>(GadgetFunction::MIDI):
374 if (!(vendorFunctions == "user" || vendorFunctions == ""))
375 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
376 ret = setVidPid("0x18d1", "0x4ee8");
377 break;
378 case GadgetFunction::ADB | GadgetFunction::MIDI:
379 if (!(vendorFunctions == "user" || vendorFunctions == ""))
380 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
381 ret = setVidPid("0x18d1", "0x4ee9");
382 break;
383 case static_cast<uint64_t>(GadgetFunction::ACCESSORY):
384 if (!(vendorFunctions == "user" || vendorFunctions == ""))
385 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
386 ret = setVidPid("0x18d1", "0x2d00");
387 break;
388 case GadgetFunction::ADB | GadgetFunction::ACCESSORY:
389 if (!(vendorFunctions == "user" || vendorFunctions == ""))
390 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
391 ret = setVidPid("0x18d1", "0x2d01");
392 break;
393 case static_cast<uint64_t>(GadgetFunction::AUDIO_SOURCE):
394 if (!(vendorFunctions == "user" || vendorFunctions == ""))
395 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
396 ret = setVidPid("0x18d1", "0x2d02");
397 break;
398 case GadgetFunction::ADB | GadgetFunction::AUDIO_SOURCE:
399 if (!(vendorFunctions == "user" || vendorFunctions == ""))
400 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
401 ret = setVidPid("0x18d1", "0x2d03");
402 break;
403 case GadgetFunction::ACCESSORY | GadgetFunction::AUDIO_SOURCE:
404 if (!(vendorFunctions == "user" || vendorFunctions == ""))
405 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
406 ret = setVidPid("0x18d1", "0x2d04");
407 break;
408 case GadgetFunction::ADB | GadgetFunction::ACCESSORY |
409 GadgetFunction::AUDIO_SOURCE:
410 if (!(vendorFunctions == "user" || vendorFunctions == ""))
411 ALOGE("Invalid vendorFunctions set: %s", vendorFunctions.c_str());
412 ret = setVidPid("0x18d1", "0x2d05");
413 break;
414 default:
415 ALOGE("Combination not supported");
416 ret = Status::CONFIGURATION_NOT_SUPPORTED;
417 }
418 return ret;
419 }
420
setupFunctions(uint64_t functions,const sp<V1_0::IUsbGadgetCallback> & callback,uint64_t timeout)421 V1_0::Status UsbGadget::setupFunctions(
422 uint64_t functions, const sp<V1_0::IUsbGadgetCallback> &callback,
423 uint64_t timeout) {
424 std::unique_lock<std::mutex> lk(mLock);
425
426 unique_fd inotifyFd(inotify_init());
427 if (inotifyFd < 0) {
428 ALOGE("inotify init failed");
429 return Status::ERROR;
430 }
431
432 bool ffsEnabled = false;
433 int i = 0;
434 std::string bootMode = GetProperty(PERSISTENT_BOOT_MODE, "");
435
436 if (((functions & GadgetFunction::MTP) != 0)) {
437 ffsEnabled = true;
438 ALOGI("setCurrentUsbFunctions mtp");
439 if (!WriteStringToFile("1", DESC_USE_PATH)) return Status::ERROR;
440
441 if (inotify_add_watch(inotifyFd, "/dev/usb-ffs/mtp/", IN_ALL_EVENTS) == -1)
442 return Status::ERROR;
443
444 if (linkFunction("ffs.mtp", i++)) return Status::ERROR;
445
446 // Add endpoints to be monitored.
447 mEndpointList.push_back("/dev/usb-ffs/mtp/ep1");
448 mEndpointList.push_back("/dev/usb-ffs/mtp/ep2");
449 mEndpointList.push_back("/dev/usb-ffs/mtp/ep3");
450 } else if (((functions & GadgetFunction::PTP) != 0)) {
451 ffsEnabled = true;
452 ALOGI("setCurrentUsbFunctions ptp");
453 if (!WriteStringToFile("1", DESC_USE_PATH)) return Status::ERROR;
454
455 if (inotify_add_watch(inotifyFd, "/dev/usb-ffs/ptp/", IN_ALL_EVENTS) == -1)
456 return Status::ERROR;
457
458
459 if (linkFunction("ffs.ptp", i++)) return Status::ERROR;
460
461 // Add endpoints to be monitored.
462 mEndpointList.push_back("/dev/usb-ffs/ptp/ep1");
463 mEndpointList.push_back("/dev/usb-ffs/ptp/ep2");
464 mEndpointList.push_back("/dev/usb-ffs/ptp/ep3");
465 }
466
467 if ((functions & GadgetFunction::MIDI) != 0) {
468 ALOGI("setCurrentUsbFunctions MIDI");
469 if (linkFunction("midi.gs5", i++)) return Status::ERROR;
470 }
471
472 if ((functions & GadgetFunction::ACCESSORY) != 0) {
473 ALOGI("setCurrentUsbFunctions Accessory");
474 if (linkFunction("accessory.gs2", i++)) return Status::ERROR;
475 }
476
477 if ((functions & GadgetFunction::AUDIO_SOURCE) != 0) {
478 ALOGI("setCurrentUsbFunctions Audio Source");
479 if (linkFunction("audio_source.gs3", i++)) return Status::ERROR;
480 }
481
482 if ((functions & GadgetFunction::RNDIS) != 0) {
483 ALOGI("setCurrentUsbFunctions rndis");
484 if (linkFunction("gsi.rndis", i++)) return Status::ERROR;
485 }
486
487 std::string vendorFunctions = getVendorFunctions();
488 if (vendorFunctions != "") {
489 ALOGI("enable usbradio debug functions");
490 char *function = strtok(const_cast<char *>(vendorFunctions.c_str()), ",");
491 while (function != NULL) {
492 if (string(function) == "diag" && linkFunction("diag.diag", i++))
493 return Status::ERROR;
494 if (string(function) == "serial_cdev" && linkFunction("cser.dun.0", i++))
495 return Status::ERROR;
496 if (string(function) == "rmnet_gsi" && linkFunction("gsi.rmnet", i++))
497 return Status::ERROR;
498 function = strtok(NULL, ",");
499 }
500 }
501
502 if ((functions & GadgetFunction::ADB) != 0) {
503 ffsEnabled = true;
504 ALOGI("setCurrentUsbFunctions Adb");
505 if (inotify_add_watch(inotifyFd, "/dev/usb-ffs/adb/", IN_ALL_EVENTS) == -1)
506 return Status::ERROR;
507
508 if (linkFunction("ffs.adb", i++)) return Status::ERROR;
509 mEndpointList.push_back("/dev/usb-ffs/adb/ep1");
510 mEndpointList.push_back("/dev/usb-ffs/adb/ep2");
511 ALOGI("Service started");
512 }
513
514 // Pull up the gadget right away when there are no ffs functions.
515 if (!ffsEnabled) {
516 if (!WriteStringToFile(GADGET_NAME, PULLUP_PATH)) return Status::ERROR;
517 mCurrentUsbFunctionsApplied = true;
518 if (callback)
519 callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS);
520 return Status::SUCCESS;
521 }
522
523 unique_fd eventFd(eventfd(0, 0));
524 if (eventFd == -1) {
525 ALOGE("mEventFd failed to create %d", errno);
526 return Status::ERROR;
527 }
528
529 unique_fd epollFd(epoll_create(2));
530 if (epollFd == -1) {
531 ALOGE("mEpollFd failed to create %d", errno);
532 return Status::ERROR;
533 }
534
535 if (addEpollFd(epollFd, inotifyFd) == -1) return Status::ERROR;
536
537 if (addEpollFd(epollFd, eventFd) == -1) return Status::ERROR;
538
539 mEpollFd = move(epollFd);
540 mInotifyFd = move(inotifyFd);
541 mEventFd = move(eventFd);
542 gadgetPullup = false;
543
544 // Monitors the ffs paths to pull up the gadget when descriptors are written.
545 // Also takes of the pulling up the gadget again if the userspace process
546 // dies and restarts.
547 mMonitor = unique_ptr<thread>(new thread(monitorFfs, this));
548 mMonitorCreated = true;
549 if (DEBUG) ALOGI("Mainthread in Cv");
550
551 if (callback) {
552 if (mCv.wait_for(lk, timeout * 1ms, [] { return gadgetPullup; })) {
553 ALOGI("monitorFfs signalled true");
554 } else {
555 ALOGI("monitorFfs signalled error");
556 // continue monitoring as the descriptors might be written at a later
557 // point.
558 }
559 Return<void> ret = callback->setCurrentUsbFunctionsCb(
560 functions, gadgetPullup ? Status::SUCCESS : Status::ERROR);
561 if (!ret.isOk())
562 ALOGE("setCurrentUsbFunctionsCb error %s", ret.description().c_str());
563 }
564
565 return Status::SUCCESS;
566 }
567
setCurrentUsbFunctions(uint64_t functions,const sp<V1_0::IUsbGadgetCallback> & callback,uint64_t timeout)568 Return<void> UsbGadget::setCurrentUsbFunctions(
569 uint64_t functions, const sp<V1_0::IUsbGadgetCallback> &callback,
570 uint64_t timeout) {
571 std::unique_lock<std::mutex> lk(mLockSetCurrentFunction);
572
573 mCurrentUsbFunctions = functions;
574 mCurrentUsbFunctionsApplied = false;
575
576 // Unlink the gadget and stop the monitor if running.
577 V1_0::Status status = tearDownGadget();
578 if (status != Status::SUCCESS) {
579 goto error;
580 }
581
582 // Leave the gadget pulled down to give time for the host to sense disconnect.
583 usleep(DISCONNECT_WAIT_US);
584
585 if (functions == static_cast<uint64_t>(GadgetFunction::NONE)) {
586 if (callback == NULL) return Void();
587 Return<void> ret =
588 callback->setCurrentUsbFunctionsCb(functions, Status::SUCCESS);
589 if (!ret.isOk())
590 ALOGE("Error while calling setCurrentUsbFunctionsCb %s",
591 ret.description().c_str());
592 return Void();
593 }
594
595 status = validateAndSetVidPid(functions);
596
597 if (status != Status::SUCCESS) {
598 goto error;
599 }
600
601 status = setupFunctions(functions, callback, timeout);
602 if (status != Status::SUCCESS) {
603 goto error;
604 }
605
606 ALOGI("Usb Gadget setcurrent functions called successfully");
607 return Void();
608
609 error:
610 ALOGI("Usb Gadget setcurrent functions failed");
611 if (callback == NULL) return Void();
612 Return<void> ret = callback->setCurrentUsbFunctionsCb(functions, status);
613 if (!ret.isOk())
614 ALOGE("Error while calling setCurrentUsbFunctionsCb %s",
615 ret.description().c_str());
616 return Void();
617 }
618 } // namespace implementation
619 } // namespace V1_0
620 } // namespace gadget
621 } // namespace usb
622 } // namespace hardware
623 } // namespace android
624