1 /*
2 * Copyright (C) 2020 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 "PowerHalLoader"
18
19 #include <android/hardware/power/1.1/IPower.h>
20 #include <android/hardware/power/1.2/IPower.h>
21 #include <android/hardware/power/1.3/IPower.h>
22 #include <android/hardware/power/IPower.h>
23 #include <binder/IServiceManager.h>
24 #include <hardware/power.h>
25 #include <hardware_legacy/power.h>
26 #include <powermanager/PowerHalLoader.h>
27
28 using namespace android::hardware::power;
29
30 namespace android {
31
32 namespace power {
33
34 // -------------------------------------------------------------------------------------------------
35
36 template <typename T, typename F>
loadHal(bool & exists,sp<T> & hal,F & loadFn,const char * halName)37 sp<T> loadHal(bool& exists, sp<T>& hal, F& loadFn, const char* halName) {
38 if (!exists) {
39 return nullptr;
40 }
41 if (hal) {
42 return hal;
43 }
44 hal = loadFn();
45 if (hal) {
46 ALOGV("Successfully connected to Power HAL %s service.", halName);
47 } else {
48 ALOGV("Power HAL %s service not available.", halName);
49 exists = false;
50 }
51 return hal;
52 }
53
54 // -------------------------------------------------------------------------------------------------
55
56 std::mutex PowerHalLoader::gHalMutex;
57 sp<IPower> PowerHalLoader::gHalAidl = nullptr;
58 sp<V1_0::IPower> PowerHalLoader::gHalHidlV1_0 = nullptr;
59 sp<V1_1::IPower> PowerHalLoader::gHalHidlV1_1 = nullptr;
60 sp<V1_2::IPower> PowerHalLoader::gHalHidlV1_2 = nullptr;
61 sp<V1_3::IPower> PowerHalLoader::gHalHidlV1_3 = nullptr;
62
unloadAll()63 void PowerHalLoader::unloadAll() {
64 std::lock_guard<std::mutex> lock(gHalMutex);
65 gHalAidl = nullptr;
66 gHalHidlV1_0 = nullptr;
67 gHalHidlV1_1 = nullptr;
68 gHalHidlV1_2 = nullptr;
69 gHalHidlV1_3 = nullptr;
70 }
71
loadAidl()72 sp<IPower> PowerHalLoader::loadAidl() {
73 std::lock_guard<std::mutex> lock(gHalMutex);
74 static bool gHalExists = true;
75 static auto loadFn = []() { return waitForVintfService<IPower>(); };
76 return loadHal<IPower>(gHalExists, gHalAidl, loadFn, "AIDL");
77 }
78
loadHidlV1_0()79 sp<V1_0::IPower> PowerHalLoader::loadHidlV1_0() {
80 std::lock_guard<std::mutex> lock(gHalMutex);
81 return loadHidlV1_0Locked();
82 }
83
loadHidlV1_1()84 sp<V1_1::IPower> PowerHalLoader::loadHidlV1_1() {
85 std::lock_guard<std::mutex> lock(gHalMutex);
86 static bool gHalExists = true;
87 static auto loadFn = []() { return V1_1::IPower::castFrom(loadHidlV1_0Locked()); };
88 return loadHal<V1_1::IPower>(gHalExists, gHalHidlV1_1, loadFn, "HIDL v1.1");
89 }
90
loadHidlV1_2()91 sp<V1_2::IPower> PowerHalLoader::loadHidlV1_2() {
92 std::lock_guard<std::mutex> lock(gHalMutex);
93 static bool gHalExists = true;
94 static auto loadFn = []() { return V1_2::IPower::castFrom(loadHidlV1_0Locked()); };
95 return loadHal<V1_2::IPower>(gHalExists, gHalHidlV1_2, loadFn, "HIDL v1.2");
96 }
97
loadHidlV1_3()98 sp<V1_3::IPower> PowerHalLoader::loadHidlV1_3() {
99 std::lock_guard<std::mutex> lock(gHalMutex);
100 static bool gHalExists = true;
101 static auto loadFn = []() { return V1_3::IPower::castFrom(loadHidlV1_0Locked()); };
102 return loadHal<V1_3::IPower>(gHalExists, gHalHidlV1_3, loadFn, "HIDL v1.3");
103 }
104
loadHidlV1_0Locked()105 sp<V1_0::IPower> PowerHalLoader::loadHidlV1_0Locked() {
106 static bool gHalExists = true;
107 static auto loadFn = []() { return V1_0::IPower::getService(); };
108 return loadHal<V1_0::IPower>(gHalExists, gHalHidlV1_0, loadFn, "HIDL v1.0");
109 }
110
111 // -------------------------------------------------------------------------------------------------
112
113 } // namespace power
114
115 } // namespace android
116