The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2008 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 "BatteryService" |
| 18 | |
| 19 | #include "JNIHelp.h" |
| 20 | #include "jni.h" |
| 21 | #include "utils/Log.h" |
| 22 | #include "utils/misc.h" |
| 23 | |
| 24 | #include <fcntl.h> |
| 25 | #include <stdio.h> |
| 26 | #include <string.h> |
| 27 | #include <sys/types.h> |
| 28 | #include <sys/socket.h> |
| 29 | #include <arpa/inet.h> |
| 30 | #include <netinet/in.h> |
| 31 | #include <stdlib.h> |
| 32 | #include <errno.h> |
| 33 | #include <unistd.h> |
| 34 | |
| 35 | #if HAVE_ANDROID_OS |
| 36 | #include <linux/ioctl.h> |
| 37 | #endif |
| 38 | |
| 39 | namespace android { |
| 40 | |
| 41 | #define AC_ONLINE_PATH "/sys/class/power_supply/ac/online" |
| 42 | #define USB_ONLINE_PATH "/sys/class/power_supply/usb/online" |
| 43 | #define BATTERY_STATUS_PATH "/sys/class/power_supply/battery/status" |
| 44 | #define BATTERY_HEALTH_PATH "/sys/class/power_supply/battery/health" |
| 45 | #define BATTERY_PRESENT_PATH "/sys/class/power_supply/battery/present" |
| 46 | #define BATTERY_CAPACITY_PATH "/sys/class/power_supply/battery/capacity" |
| 47 | #define BATTERY_VOLTAGE_PATH "/sys/class/power_supply/battery/batt_vol" |
| 48 | #define BATTERY_TEMPERATURE_PATH "/sys/class/power_supply/battery/batt_temp" |
| 49 | #define BATTERY_TECHNOLOGY_PATH "/sys/class/power_supply/battery/technology" |
| 50 | |
| 51 | struct FieldIds { |
| 52 | // members |
| 53 | jfieldID mAcOnline; |
| 54 | jfieldID mUsbOnline; |
| 55 | jfieldID mBatteryStatus; |
| 56 | jfieldID mBatteryHealth; |
| 57 | jfieldID mBatteryPresent; |
| 58 | jfieldID mBatteryLevel; |
| 59 | jfieldID mBatteryVoltage; |
| 60 | jfieldID mBatteryTemperature; |
| 61 | jfieldID mBatteryTechnology; |
| 62 | }; |
| 63 | static FieldIds gFieldIds; |
| 64 | |
| 65 | struct BatteryManagerConstants { |
| 66 | jint statusUnknown; |
| 67 | jint statusCharging; |
| 68 | jint statusDischarging; |
| 69 | jint statusNotCharging; |
| 70 | jint statusFull; |
| 71 | jint healthUnknown; |
| 72 | jint healthGood; |
| 73 | jint healthOverheat; |
| 74 | jint healthDead; |
| 75 | jint healthOverVoltage; |
| 76 | jint healthUnspecifiedFailure; |
| 77 | }; |
| 78 | static BatteryManagerConstants gConstants; |
| 79 | |
| 80 | static jint getBatteryStatus(const char* status) |
| 81 | { |
| 82 | switch (status[0]) { |
| 83 | case 'C': return gConstants.statusCharging; // Charging |
| 84 | case 'D': return gConstants.statusDischarging; // Discharging |
| 85 | case 'F': return gConstants.statusFull; // Not charging |
| 86 | case 'N': return gConstants.statusNotCharging; // Full |
| 87 | case 'U': return gConstants.statusUnknown; // Unknown |
| 88 | |
| 89 | default: { |
| 90 | LOGW("Unknown battery status '%s'", status); |
| 91 | return gConstants.statusUnknown; |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | static jint getBatteryHealth(const char* status) |
| 97 | { |
| 98 | switch (status[0]) { |
| 99 | case 'D': return gConstants.healthDead; // Dead |
| 100 | case 'G': return gConstants.healthGood; // Good |
| 101 | case 'O': { |
| 102 | if (strcmp(status, "Overheat") == 0) { |
| 103 | return gConstants.healthOverheat; |
| 104 | } else if (strcmp(status, "Over voltage") == 0) { |
| 105 | return gConstants.healthOverVoltage; |
| 106 | } |
| 107 | LOGW("Unknown battery health[1] '%s'", status); |
| 108 | return gConstants.healthUnknown; |
| 109 | } |
| 110 | |
| 111 | case 'U': { |
| 112 | if (strcmp(status, "Unspecified failure") == 0) { |
| 113 | return gConstants.healthUnspecifiedFailure; |
| 114 | } else if (strcmp(status, "Unknown") == 0) { |
| 115 | return gConstants.healthUnknown; |
| 116 | } |
| 117 | // fall through |
| 118 | } |
| 119 | |
| 120 | default: { |
| 121 | LOGW("Unknown battery health[2] '%s'", status); |
| 122 | return gConstants.healthUnknown; |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | static int readFromFile(const char* path, char* buf, size_t size) |
| 128 | { |
| 129 | int fd = open(path, O_RDONLY, 0); |
| 130 | if (fd == -1) { |
| 131 | LOGE("Could not open '%s'", path); |
| 132 | return -1; |
| 133 | } |
| 134 | |
| 135 | size_t count = read(fd, buf, size); |
| 136 | if (count > 0) { |
| 137 | count = (count < size) ? count : size - 1; |
| 138 | while (count > 0 && buf[count-1] == '\n') count--; |
| 139 | buf[count] = '\0'; |
| 140 | } else { |
| 141 | buf[0] = '\0'; |
| 142 | } |
| 143 | |
| 144 | close(fd); |
| 145 | return count; |
| 146 | } |
| 147 | |
| 148 | static void setBooleanField(JNIEnv* env, jobject obj, const char* path, jfieldID fieldID) |
| 149 | { |
| 150 | const int SIZE = 16; |
| 151 | char buf[SIZE]; |
| 152 | |
| 153 | jboolean value = false; |
| 154 | if (readFromFile(path, buf, SIZE) > 0) { |
| 155 | if (buf[0] == '1') { |
| 156 | value = true; |
| 157 | } |
| 158 | } |
| 159 | env->SetBooleanField(obj, fieldID, value); |
| 160 | } |
| 161 | |
| 162 | static void setIntField(JNIEnv* env, jobject obj, const char* path, jfieldID fieldID) |
| 163 | { |
| 164 | const int SIZE = 128; |
| 165 | char buf[SIZE]; |
| 166 | |
| 167 | jint value = 0; |
| 168 | if (readFromFile(path, buf, SIZE) > 0) { |
| 169 | value = atoi(buf); |
| 170 | } |
| 171 | env->SetIntField(obj, fieldID, value); |
| 172 | } |
| 173 | |
| 174 | static void android_server_BatteryService_update(JNIEnv* env, jobject obj) |
| 175 | { |
| 176 | setBooleanField(env, obj, AC_ONLINE_PATH, gFieldIds.mAcOnline); |
| 177 | setBooleanField(env, obj, USB_ONLINE_PATH, gFieldIds.mUsbOnline); |
| 178 | setBooleanField(env, obj, BATTERY_PRESENT_PATH, gFieldIds.mBatteryPresent); |
| 179 | |
| 180 | setIntField(env, obj, BATTERY_CAPACITY_PATH, gFieldIds.mBatteryLevel); |
| 181 | setIntField(env, obj, BATTERY_VOLTAGE_PATH, gFieldIds.mBatteryVoltage); |
| 182 | setIntField(env, obj, BATTERY_TEMPERATURE_PATH, gFieldIds.mBatteryTemperature); |
| 183 | |
| 184 | const int SIZE = 128; |
| 185 | char buf[SIZE]; |
| 186 | |
| 187 | if (readFromFile(BATTERY_STATUS_PATH, buf, SIZE) > 0) |
| 188 | env->SetIntField(obj, gFieldIds.mBatteryStatus, getBatteryStatus(buf)); |
Rebecca Schultz Zavin | e7e6fa3 | 2009-04-28 17:24:47 -0700 | [diff] [blame] | 189 | else |
| 190 | env->SetIntField(obj, gFieldIds.mBatteryStatus, |
| 191 | gConstants.statusUnknown); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 192 | |
| 193 | if (readFromFile(BATTERY_HEALTH_PATH, buf, SIZE) > 0) |
| 194 | env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf)); |
| 195 | |
| 196 | if (readFromFile(BATTERY_TECHNOLOGY_PATH, buf, SIZE) > 0) |
| 197 | env->SetObjectField(obj, gFieldIds.mBatteryTechnology, env->NewStringUTF(buf)); |
| 198 | } |
| 199 | |
| 200 | static JNINativeMethod sMethods[] = { |
| 201 | /* name, signature, funcPtr */ |
| 202 | {"native_update", "()V", (void*)android_server_BatteryService_update}, |
| 203 | }; |
| 204 | |
| 205 | int register_android_server_BatteryService(JNIEnv* env) |
| 206 | { |
| 207 | jclass clazz = env->FindClass("com/android/server/BatteryService"); |
| 208 | |
| 209 | if (clazz == NULL) { |
| 210 | LOGE("Can't find com/android/server/BatteryService"); |
| 211 | return -1; |
| 212 | } |
| 213 | |
| 214 | gFieldIds.mAcOnline = env->GetFieldID(clazz, "mAcOnline", "Z"); |
| 215 | gFieldIds.mUsbOnline = env->GetFieldID(clazz, "mUsbOnline", "Z"); |
| 216 | gFieldIds.mBatteryStatus = env->GetFieldID(clazz, "mBatteryStatus", "I"); |
| 217 | gFieldIds.mBatteryHealth = env->GetFieldID(clazz, "mBatteryHealth", "I"); |
| 218 | gFieldIds.mBatteryPresent = env->GetFieldID(clazz, "mBatteryPresent", "Z"); |
| 219 | gFieldIds.mBatteryLevel = env->GetFieldID(clazz, "mBatteryLevel", "I"); |
| 220 | gFieldIds.mBatteryTechnology = env->GetFieldID(clazz, "mBatteryTechnology", "Ljava/lang/String;"); |
| 221 | gFieldIds.mBatteryVoltage = env->GetFieldID(clazz, "mBatteryVoltage", "I"); |
| 222 | gFieldIds.mBatteryTemperature = env->GetFieldID(clazz, "mBatteryTemperature", "I"); |
| 223 | |
| 224 | LOG_FATAL_IF(gFieldIds.mAcOnline == NULL, "Unable to find BatteryService.AC_ONLINE_PATH"); |
| 225 | LOG_FATAL_IF(gFieldIds.mUsbOnline == NULL, "Unable to find BatteryService.USB_ONLINE_PATH"); |
| 226 | LOG_FATAL_IF(gFieldIds.mBatteryStatus == NULL, "Unable to find BatteryService.BATTERY_STATUS_PATH"); |
| 227 | LOG_FATAL_IF(gFieldIds.mBatteryHealth == NULL, "Unable to find BatteryService.BATTERY_HEALTH_PATH"); |
| 228 | LOG_FATAL_IF(gFieldIds.mBatteryPresent == NULL, "Unable to find BatteryService.BATTERY_PRESENT_PATH"); |
| 229 | LOG_FATAL_IF(gFieldIds.mBatteryLevel == NULL, "Unable to find BatteryService.BATTERY_CAPACITY_PATH"); |
| 230 | LOG_FATAL_IF(gFieldIds.mBatteryVoltage == NULL, "Unable to find BatteryService.BATTERY_VOLTAGE_PATH"); |
| 231 | LOG_FATAL_IF(gFieldIds.mBatteryTemperature == NULL, "Unable to find BatteryService.BATTERY_TEMPERATURE_PATH"); |
| 232 | LOG_FATAL_IF(gFieldIds.mBatteryTechnology == NULL, "Unable to find BatteryService.BATTERY_TECHNOLOGY_PATH"); |
| 233 | |
| 234 | clazz = env->FindClass("android/os/BatteryManager"); |
| 235 | |
| 236 | if (clazz == NULL) { |
| 237 | LOGE("Can't find android/os/BatteryManager"); |
| 238 | return -1; |
| 239 | } |
| 240 | |
| 241 | gConstants.statusUnknown = env->GetStaticIntField(clazz, |
| 242 | env->GetStaticFieldID(clazz, "BATTERY_STATUS_UNKNOWN", "I")); |
| 243 | |
| 244 | gConstants.statusCharging = env->GetStaticIntField(clazz, |
| 245 | env->GetStaticFieldID(clazz, "BATTERY_STATUS_CHARGING", "I")); |
| 246 | |
| 247 | gConstants.statusDischarging = env->GetStaticIntField(clazz, |
| 248 | env->GetStaticFieldID(clazz, "BATTERY_STATUS_DISCHARGING", "I")); |
| 249 | |
| 250 | gConstants.statusNotCharging = env->GetStaticIntField(clazz, |
| 251 | env->GetStaticFieldID(clazz, "BATTERY_STATUS_NOT_CHARGING", "I")); |
| 252 | |
| 253 | gConstants.statusFull = env->GetStaticIntField(clazz, |
| 254 | env->GetStaticFieldID(clazz, "BATTERY_STATUS_FULL", "I")); |
| 255 | |
| 256 | gConstants.healthUnknown = env->GetStaticIntField(clazz, |
| 257 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_UNKNOWN", "I")); |
| 258 | |
| 259 | gConstants.healthGood = env->GetStaticIntField(clazz, |
| 260 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_GOOD", "I")); |
| 261 | |
| 262 | gConstants.healthOverheat = env->GetStaticIntField(clazz, |
| 263 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_OVERHEAT", "I")); |
| 264 | |
| 265 | gConstants.healthDead = env->GetStaticIntField(clazz, |
| 266 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_DEAD", "I")); |
| 267 | |
| 268 | gConstants.healthOverVoltage = env->GetStaticIntField(clazz, |
| 269 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_OVER_VOLTAGE", "I")); |
| 270 | |
| 271 | gConstants.healthUnspecifiedFailure = env->GetStaticIntField(clazz, |
| 272 | env->GetStaticFieldID(clazz, "BATTERY_HEALTH_UNSPECIFIED_FAILURE", "I")); |
| 273 | |
| 274 | return jniRegisterNativeMethods(env, "com/android/server/BatteryService", sMethods, NELEM(sMethods)); |
| 275 | } |
| 276 | |
| 277 | } /* namespace android */ |