1 /*
2  * Copyright (C) 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.thermal@1.0-impl"
18 
19 #include <errno.h>
20 #include <math.h>
21 
22 #include <vector>
23 
24 #include <log/log.h>
25 
26 #include <hardware/hardware.h>
27 #include <hardware/thermal.h>
28 
29 #include "Thermal.h"
30 
31 namespace android {
32 namespace hardware {
33 namespace thermal {
34 namespace V1_0 {
35 namespace implementation {
36 
37 namespace {
38 
finalizeTemperature(float temperature)39 float finalizeTemperature(float temperature) {
40     return temperature == UNKNOWN_TEMPERATURE ? NAN : temperature;
41 }
42 
43 }
44 
Thermal(thermal_module_t * module)45 Thermal::Thermal(thermal_module_t* module) : mModule(module) {}
46 
47 // Methods from ::android::hardware::thermal::V1_0::IThermal follow.
getTemperatures(getTemperatures_cb _hidl_cb)48 Return<void> Thermal::getTemperatures(getTemperatures_cb _hidl_cb) {
49   ThermalStatus status;
50   status.code = ThermalStatusCode::SUCCESS;
51   hidl_vec<Temperature> temperatures;
52 
53   if (!mModule || !mModule->getTemperatures) {
54     ALOGI("getTemperatures is not implemented in Thermal HAL.");
55     _hidl_cb(status, temperatures);
56     return Void();
57   }
58 
59   ssize_t size = mModule->getTemperatures(mModule, nullptr, 0);
60   if (size >= 0) {
61     std::vector<temperature_t> list;
62     list.resize(size);
63     size = mModule->getTemperatures(mModule, list.data(), list.size());
64     if (size >= 0) {
65       temperatures.resize(list.size());
66       for (size_t i = 0; i < list.size(); ++i) {
67         switch (list[i].type) {
68           case DEVICE_TEMPERATURE_UNKNOWN:
69             temperatures[i].type = TemperatureType::UNKNOWN;
70             break;
71           case DEVICE_TEMPERATURE_CPU:
72             temperatures[i].type = TemperatureType::CPU;
73             break;
74           case DEVICE_TEMPERATURE_GPU:
75             temperatures[i].type = TemperatureType::GPU;
76             break;
77           case DEVICE_TEMPERATURE_BATTERY:
78             temperatures[i].type = TemperatureType::BATTERY;
79             break;
80           case DEVICE_TEMPERATURE_SKIN:
81             temperatures[i].type = TemperatureType::SKIN;
82             break;
83           default:
84             ALOGE("Unknown temperature %s type", list[i].name);
85             ;
86         }
87         temperatures[i].name = list[i].name;
88         temperatures[i].currentValue = finalizeTemperature(list[i].current_value);
89         temperatures[i].throttlingThreshold = finalizeTemperature(list[i].throttling_threshold);
90         temperatures[i].shutdownThreshold = finalizeTemperature(list[i].shutdown_threshold);
91         temperatures[i].vrThrottlingThreshold =
92                 finalizeTemperature(list[i].vr_throttling_threshold);
93       }
94     }
95   }
96   if (size < 0) {
97     status.code = ThermalStatusCode::FAILURE;
98     status.debugMessage = strerror(-size);
99   }
100   _hidl_cb(status, temperatures);
101   return Void();
102 }
103 
getCpuUsages(getCpuUsages_cb _hidl_cb)104 Return<void> Thermal::getCpuUsages(getCpuUsages_cb _hidl_cb) {
105   ThermalStatus status;
106   hidl_vec<CpuUsage> cpuUsages;
107   status.code = ThermalStatusCode::SUCCESS;
108 
109   if (!mModule || !mModule->getCpuUsages) {
110     ALOGI("getCpuUsages is not implemented in Thermal HAL");
111     _hidl_cb(status, cpuUsages);
112     return Void();
113   }
114 
115   ssize_t size = mModule->getCpuUsages(mModule, nullptr);
116   if (size >= 0) {
117     std::vector<cpu_usage_t> list;
118     list.resize(size);
119     size = mModule->getCpuUsages(mModule, list.data());
120     if (size >= 0) {
121       list.resize(size);
122       cpuUsages.resize(size);
123       for (size_t i = 0; i < list.size(); ++i) {
124         cpuUsages[i].name = list[i].name;
125         cpuUsages[i].active = list[i].active;
126         cpuUsages[i].total = list[i].total;
127         cpuUsages[i].isOnline = list[i].is_online;
128       }
129     } else {
130       status.code = ThermalStatusCode::FAILURE;
131       status.debugMessage = strerror(-size);
132     }
133   }
134   if (size < 0) {
135     status.code = ThermalStatusCode::FAILURE;
136     status.debugMessage = strerror(-size);
137   }
138   _hidl_cb(status, cpuUsages);
139   return Void();
140 }
141 
getCoolingDevices(getCoolingDevices_cb _hidl_cb)142 Return<void> Thermal::getCoolingDevices(getCoolingDevices_cb _hidl_cb) {
143   ThermalStatus status;
144   status.code = ThermalStatusCode::SUCCESS;
145   hidl_vec<CoolingDevice> coolingDevices;
146 
147   if (!mModule || !mModule->getCoolingDevices) {
148     ALOGI("getCoolingDevices is not implemented in Thermal HAL.");
149     _hidl_cb(status, coolingDevices);
150     return Void();
151   }
152 
153   ssize_t size = mModule->getCoolingDevices(mModule, nullptr, 0);
154   if (size >= 0) {
155     std::vector<cooling_device_t> list;
156     list.resize(size);
157     size = mModule->getCoolingDevices(mModule, list.data(), list.size());
158     if (size >= 0) {
159       list.resize(size);
160       coolingDevices.resize(list.size());
161       for (size_t i = 0; i < list.size(); ++i) {
162         switch (list[i].type) {
163           case FAN_RPM:
164             coolingDevices[i].type = CoolingType::FAN_RPM;
165             break;
166           default:
167             ALOGE("Unknown cooling device %s type", list[i].name);
168         }
169         coolingDevices[i].name = list[i].name;
170         coolingDevices[i].currentValue = list[i].current_value;
171       }
172     }
173   }
174   if (size < 0) {
175     status.code = ThermalStatusCode::FAILURE;
176     status.debugMessage = strerror(-size);
177   }
178   _hidl_cb(status, coolingDevices);
179   return Void();
180 }
181 
HIDL_FETCH_IThermal(const char *)182 IThermal* HIDL_FETCH_IThermal(const char* /* name */) {
183   thermal_module_t* module;
184   status_t err = hw_get_module(THERMAL_HARDWARE_MODULE_ID,
185                                const_cast<hw_module_t const**>(
186                                    reinterpret_cast<hw_module_t**>(&module)));
187   if (err || !module) {
188     ALOGE("Couldn't load %s module (%s)", THERMAL_HARDWARE_MODULE_ID,
189           strerror(-err));
190   }
191 
192   if (err == 0 && module->common.methods->open) {
193     struct hw_device_t* device;
194     err = module->common.methods->open(&module->common,
195                                        THERMAL_HARDWARE_MODULE_ID, &device);
196     if (err) {
197       ALOGE("Couldn't open %s module (%s)", THERMAL_HARDWARE_MODULE_ID,
198             strerror(-err));
199     } else {
200       return new Thermal(reinterpret_cast<thermal_module_t*>(device));
201     }
202   }
203   return new Thermal(module);
204 }
205 
206 }  // namespace implementation
207 }  // namespace V1_0
208 }  // namespace thermal
209 }  // namespace hardware
210 }  // namespace android
211