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 #ifndef ANDROID_HARDWARE_USB_GADGET_V1_0_USBGADGET_H 18 #define ANDROID_HARDWARE_USB_GADGET_V1_0_USBGADGET_H 19 20 #include <android-base/file.h> 21 #include <android-base/properties.h> 22 #include <android-base/unique_fd.h> 23 #include <android/hardware/usb/gadget/1.0/IUsbGadget.h> 24 #include <hidl/MQDescriptor.h> 25 #include <hidl/Status.h> 26 #include <string> 27 #include <sys/epoll.h> 28 #include <sys/eventfd.h> 29 #include <thread> 30 #include <utils/Log.h> 31 #include <chrono> 32 #include <condition_variable> 33 #include <mutex> 34 35 namespace android { 36 namespace hardware { 37 namespace usb { 38 namespace gadget { 39 namespace V1_0 { 40 namespace implementation { 41 42 using ::android::sp; 43 using ::android::base::GetProperty; 44 using ::android::base::SetProperty; 45 using ::android::base::unique_fd; 46 using ::android::base::WriteStringToFile; 47 using ::android::hardware::hidl_array; 48 using ::android::hardware::hidl_memory; 49 using ::android::hardware::hidl_string; 50 using ::android::hardware::hidl_vec; 51 using ::android::hardware::Return; 52 using ::android::hardware::Void; 53 using ::std::lock_guard; 54 using ::std::move; 55 using ::std::mutex; 56 using ::std::string; 57 using ::std::thread; 58 using ::std::unique_ptr; 59 using ::std::vector; 60 using namespace std::chrono_literals; 61 62 struct UsbGadget : public IUsbGadget { 63 UsbGadget(); 64 unique_fd mInotifyFd; 65 unique_fd mEventFd; 66 unique_fd mEpollFd; 67 68 unique_ptr<thread> mMonitor; 69 volatile bool mMonitorCreated; 70 vector<string> mEndpointList; 71 // protects the CV. 72 std::mutex mLock; 73 std::condition_variable mCv; 74 75 // Makes sure that only one request is processed at a time. 76 std::mutex mLockSetCurrentFunction; 77 uint64_t mCurrentUsbFunctions; 78 bool mCurrentUsbFunctionsApplied; 79 80 Return<void> setCurrentUsbFunctions(uint64_t functions, 81 const sp<IUsbGadgetCallback>& callback, 82 uint64_t timeout) override; 83 84 Return<void> getCurrentUsbFunctions( 85 const sp<IUsbGadgetCallback>& callback) override; 86 87 private: 88 Status tearDownGadget(); 89 Status setupFunctions(uint64_t functions, 90 const sp<IUsbGadgetCallback>& callback, 91 uint64_t timeout); 92 }; 93 94 } // namespace implementation 95 } // namespace V1_0 96 } // namespace gadget 97 } // namespace usb 98 } // namespace hardware 99 } // namespace android 100 101 #endif // ANDROID_HARDWARE_USB_V1_2_USBGADGET_H 102