e7e6fa3fbf
If the battery files can't be found return status_unkown instead of an error. On systems where we haven't brought up battery stats yet they assume the battery is dead and turn off as soon as the runtime starts Signed-off-by: Rebecca Schultz Zavin <rebecca@android.com>
278 lines
9.9 KiB
C++
278 lines
9.9 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "BatteryService"
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#include "JNIHelp.h"
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#include "jni.h"
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#include "utils/Log.h"
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#include "utils/misc.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#if HAVE_ANDROID_OS
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#include <linux/ioctl.h>
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#endif
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namespace android {
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#define AC_ONLINE_PATH "/sys/class/power_supply/ac/online"
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#define USB_ONLINE_PATH "/sys/class/power_supply/usb/online"
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#define BATTERY_STATUS_PATH "/sys/class/power_supply/battery/status"
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#define BATTERY_HEALTH_PATH "/sys/class/power_supply/battery/health"
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#define BATTERY_PRESENT_PATH "/sys/class/power_supply/battery/present"
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#define BATTERY_CAPACITY_PATH "/sys/class/power_supply/battery/capacity"
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#define BATTERY_VOLTAGE_PATH "/sys/class/power_supply/battery/batt_vol"
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#define BATTERY_TEMPERATURE_PATH "/sys/class/power_supply/battery/batt_temp"
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#define BATTERY_TECHNOLOGY_PATH "/sys/class/power_supply/battery/technology"
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struct FieldIds {
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// members
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jfieldID mAcOnline;
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jfieldID mUsbOnline;
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jfieldID mBatteryStatus;
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jfieldID mBatteryHealth;
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jfieldID mBatteryPresent;
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jfieldID mBatteryLevel;
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jfieldID mBatteryVoltage;
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jfieldID mBatteryTemperature;
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jfieldID mBatteryTechnology;
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};
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static FieldIds gFieldIds;
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struct BatteryManagerConstants {
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jint statusUnknown;
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jint statusCharging;
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jint statusDischarging;
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jint statusNotCharging;
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jint statusFull;
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jint healthUnknown;
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jint healthGood;
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jint healthOverheat;
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jint healthDead;
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jint healthOverVoltage;
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jint healthUnspecifiedFailure;
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};
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static BatteryManagerConstants gConstants;
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static jint getBatteryStatus(const char* status)
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{
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switch (status[0]) {
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case 'C': return gConstants.statusCharging; // Charging
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case 'D': return gConstants.statusDischarging; // Discharging
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case 'F': return gConstants.statusFull; // Not charging
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case 'N': return gConstants.statusNotCharging; // Full
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case 'U': return gConstants.statusUnknown; // Unknown
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default: {
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LOGW("Unknown battery status '%s'", status);
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return gConstants.statusUnknown;
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}
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}
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}
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static jint getBatteryHealth(const char* status)
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{
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switch (status[0]) {
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case 'D': return gConstants.healthDead; // Dead
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case 'G': return gConstants.healthGood; // Good
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case 'O': {
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if (strcmp(status, "Overheat") == 0) {
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return gConstants.healthOverheat;
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} else if (strcmp(status, "Over voltage") == 0) {
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return gConstants.healthOverVoltage;
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}
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LOGW("Unknown battery health[1] '%s'", status);
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return gConstants.healthUnknown;
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}
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case 'U': {
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if (strcmp(status, "Unspecified failure") == 0) {
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return gConstants.healthUnspecifiedFailure;
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} else if (strcmp(status, "Unknown") == 0) {
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return gConstants.healthUnknown;
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}
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// fall through
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}
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default: {
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LOGW("Unknown battery health[2] '%s'", status);
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return gConstants.healthUnknown;
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}
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}
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}
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static int readFromFile(const char* path, char* buf, size_t size)
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{
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int fd = open(path, O_RDONLY, 0);
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if (fd == -1) {
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LOGE("Could not open '%s'", path);
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return -1;
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}
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size_t count = read(fd, buf, size);
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if (count > 0) {
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count = (count < size) ? count : size - 1;
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while (count > 0 && buf[count-1] == '\n') count--;
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buf[count] = '\0';
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} else {
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buf[0] = '\0';
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}
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close(fd);
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return count;
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}
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static void setBooleanField(JNIEnv* env, jobject obj, const char* path, jfieldID fieldID)
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{
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const int SIZE = 16;
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char buf[SIZE];
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jboolean value = false;
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if (readFromFile(path, buf, SIZE) > 0) {
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if (buf[0] == '1') {
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value = true;
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}
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}
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env->SetBooleanField(obj, fieldID, value);
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}
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static void setIntField(JNIEnv* env, jobject obj, const char* path, jfieldID fieldID)
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{
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const int SIZE = 128;
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char buf[SIZE];
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jint value = 0;
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if (readFromFile(path, buf, SIZE) > 0) {
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value = atoi(buf);
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}
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env->SetIntField(obj, fieldID, value);
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}
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static void android_server_BatteryService_update(JNIEnv* env, jobject obj)
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{
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setBooleanField(env, obj, AC_ONLINE_PATH, gFieldIds.mAcOnline);
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setBooleanField(env, obj, USB_ONLINE_PATH, gFieldIds.mUsbOnline);
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setBooleanField(env, obj, BATTERY_PRESENT_PATH, gFieldIds.mBatteryPresent);
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setIntField(env, obj, BATTERY_CAPACITY_PATH, gFieldIds.mBatteryLevel);
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setIntField(env, obj, BATTERY_VOLTAGE_PATH, gFieldIds.mBatteryVoltage);
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setIntField(env, obj, BATTERY_TEMPERATURE_PATH, gFieldIds.mBatteryTemperature);
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const int SIZE = 128;
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char buf[SIZE];
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if (readFromFile(BATTERY_STATUS_PATH, buf, SIZE) > 0)
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env->SetIntField(obj, gFieldIds.mBatteryStatus, getBatteryStatus(buf));
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else
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env->SetIntField(obj, gFieldIds.mBatteryStatus,
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gConstants.statusUnknown);
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if (readFromFile(BATTERY_HEALTH_PATH, buf, SIZE) > 0)
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env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf));
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if (readFromFile(BATTERY_TECHNOLOGY_PATH, buf, SIZE) > 0)
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env->SetObjectField(obj, gFieldIds.mBatteryTechnology, env->NewStringUTF(buf));
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}
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static JNINativeMethod sMethods[] = {
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/* name, signature, funcPtr */
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{"native_update", "()V", (void*)android_server_BatteryService_update},
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};
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int register_android_server_BatteryService(JNIEnv* env)
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{
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jclass clazz = env->FindClass("com/android/server/BatteryService");
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if (clazz == NULL) {
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LOGE("Can't find com/android/server/BatteryService");
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return -1;
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}
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gFieldIds.mAcOnline = env->GetFieldID(clazz, "mAcOnline", "Z");
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gFieldIds.mUsbOnline = env->GetFieldID(clazz, "mUsbOnline", "Z");
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gFieldIds.mBatteryStatus = env->GetFieldID(clazz, "mBatteryStatus", "I");
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gFieldIds.mBatteryHealth = env->GetFieldID(clazz, "mBatteryHealth", "I");
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gFieldIds.mBatteryPresent = env->GetFieldID(clazz, "mBatteryPresent", "Z");
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gFieldIds.mBatteryLevel = env->GetFieldID(clazz, "mBatteryLevel", "I");
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gFieldIds.mBatteryTechnology = env->GetFieldID(clazz, "mBatteryTechnology", "Ljava/lang/String;");
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gFieldIds.mBatteryVoltage = env->GetFieldID(clazz, "mBatteryVoltage", "I");
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gFieldIds.mBatteryTemperature = env->GetFieldID(clazz, "mBatteryTemperature", "I");
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LOG_FATAL_IF(gFieldIds.mAcOnline == NULL, "Unable to find BatteryService.AC_ONLINE_PATH");
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LOG_FATAL_IF(gFieldIds.mUsbOnline == NULL, "Unable to find BatteryService.USB_ONLINE_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryStatus == NULL, "Unable to find BatteryService.BATTERY_STATUS_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryHealth == NULL, "Unable to find BatteryService.BATTERY_HEALTH_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryPresent == NULL, "Unable to find BatteryService.BATTERY_PRESENT_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryLevel == NULL, "Unable to find BatteryService.BATTERY_CAPACITY_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryVoltage == NULL, "Unable to find BatteryService.BATTERY_VOLTAGE_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryTemperature == NULL, "Unable to find BatteryService.BATTERY_TEMPERATURE_PATH");
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LOG_FATAL_IF(gFieldIds.mBatteryTechnology == NULL, "Unable to find BatteryService.BATTERY_TECHNOLOGY_PATH");
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clazz = env->FindClass("android/os/BatteryManager");
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if (clazz == NULL) {
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LOGE("Can't find android/os/BatteryManager");
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return -1;
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}
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gConstants.statusUnknown = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_STATUS_UNKNOWN", "I"));
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gConstants.statusCharging = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_STATUS_CHARGING", "I"));
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gConstants.statusDischarging = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_STATUS_DISCHARGING", "I"));
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gConstants.statusNotCharging = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_STATUS_NOT_CHARGING", "I"));
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gConstants.statusFull = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_STATUS_FULL", "I"));
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gConstants.healthUnknown = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_UNKNOWN", "I"));
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gConstants.healthGood = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_GOOD", "I"));
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gConstants.healthOverheat = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_OVERHEAT", "I"));
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gConstants.healthDead = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_DEAD", "I"));
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gConstants.healthOverVoltage = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_OVER_VOLTAGE", "I"));
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gConstants.healthUnspecifiedFailure = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_UNSPECIFIED_FAILURE", "I"));
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return jniRegisterNativeMethods(env, "com/android/server/BatteryService", sMethods, NELEM(sMethods));
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}
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} /* namespace android */
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