9239612870
The Linux kernel supports reporting "cold" battery health to sysfs. Android framework has not implemented this and it defaults to "unknown" This adds handling the cold battery health. Change-Id: Idcc156aae6aabce73391081143f79d052edf332e
402 lines
14 KiB
C++
402 lines
14 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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#include <dirent.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 POWER_SUPPLY_PATH "/sys/class/power_supply"
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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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jint healthCold;
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};
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static BatteryManagerConstants gConstants;
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struct PowerSupplyPaths {
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char* acOnlinePath;
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char* usbOnlinePath;
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char* batteryStatusPath;
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char* batteryHealthPath;
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char* batteryPresentPath;
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char* batteryCapacityPath;
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char* batteryVoltagePath;
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char* batteryTemperaturePath;
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char* batteryTechnologyPath;
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};
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static PowerSupplyPaths gPaths;
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static int gVoltageDivisor = 1;
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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 'C': return gConstants.healthCold; // Cold
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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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if (!path)
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return -1;
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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 setVoltageField(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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value /= gVoltageDivisor;
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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, gPaths.acOnlinePath, gFieldIds.mAcOnline);
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setBooleanField(env, obj, gPaths.usbOnlinePath, gFieldIds.mUsbOnline);
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setBooleanField(env, obj, gPaths.batteryPresentPath, gFieldIds.mBatteryPresent);
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setIntField(env, obj, gPaths.batteryCapacityPath, gFieldIds.mBatteryLevel);
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setVoltageField(env, obj, gPaths.batteryVoltagePath, gFieldIds.mBatteryVoltage);
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setIntField(env, obj, gPaths.batteryTemperaturePath, gFieldIds.mBatteryTemperature);
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const int SIZE = 128;
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char buf[SIZE];
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if (readFromFile(gPaths.batteryStatusPath, 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(gPaths.batteryHealthPath, buf, SIZE) > 0)
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env->SetIntField(obj, gFieldIds.mBatteryHealth, getBatteryHealth(buf));
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if (readFromFile(gPaths.batteryTechnologyPath, 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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char path[PATH_MAX];
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struct dirent* entry;
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DIR* dir = opendir(POWER_SUPPLY_PATH);
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if (dir == NULL) {
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LOGE("Could not open %s\n", POWER_SUPPLY_PATH);
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return -1;
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}
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while ((entry = readdir(dir))) {
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const char* name = entry->d_name;
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// ignore "." and ".."
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if (name[0] == '.' && (name[1] == 0 || (name[1] == '.' && name[2] == 0))) {
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continue;
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}
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char buf[20];
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// Look for "type" file in each subdirectory
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snprintf(path, sizeof(path), "%s/%s/type", POWER_SUPPLY_PATH, name);
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int length = readFromFile(path, buf, sizeof(buf));
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if (length > 0) {
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if (buf[length - 1] == '\n')
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buf[length - 1] = 0;
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if (strcmp(buf, "Mains") == 0) {
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snprintf(path, sizeof(path), "%s/%s/online", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.acOnlinePath = strdup(path);
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}
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else if (strcmp(buf, "USB") == 0) {
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snprintf(path, sizeof(path), "%s/%s/online", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.usbOnlinePath = strdup(path);
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}
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else if (strcmp(buf, "Battery") == 0) {
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snprintf(path, sizeof(path), "%s/%s/status", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryStatusPath = strdup(path);
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snprintf(path, sizeof(path), "%s/%s/health", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryHealthPath = strdup(path);
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snprintf(path, sizeof(path), "%s/%s/present", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryPresentPath = strdup(path);
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snprintf(path, sizeof(path), "%s/%s/capacity", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryCapacityPath = strdup(path);
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snprintf(path, sizeof(path), "%s/%s/voltage_now", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0) {
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gPaths.batteryVoltagePath = strdup(path);
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// voltage_now is in microvolts, not millivolts
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gVoltageDivisor = 1000;
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} else {
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snprintf(path, sizeof(path), "%s/%s/batt_vol", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryVoltagePath = strdup(path);
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}
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snprintf(path, sizeof(path), "%s/%s/temp", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0) {
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gPaths.batteryTemperaturePath = strdup(path);
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} else {
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snprintf(path, sizeof(path), "%s/%s/batt_temp", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryTemperaturePath = strdup(path);
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}
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snprintf(path, sizeof(path), "%s/%s/technology", POWER_SUPPLY_PATH, name);
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if (access(path, R_OK) == 0)
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gPaths.batteryTechnologyPath = strdup(path);
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}
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}
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}
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closedir(dir);
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if (!gPaths.acOnlinePath)
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LOGE("acOnlinePath not found");
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if (!gPaths.usbOnlinePath)
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LOGE("usbOnlinePath not found");
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if (!gPaths.batteryStatusPath)
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LOGE("batteryStatusPath not found");
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if (!gPaths.batteryHealthPath)
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LOGE("batteryHealthPath not found");
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if (!gPaths.batteryPresentPath)
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LOGE("batteryPresentPath not found");
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if (!gPaths.batteryCapacityPath)
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LOGE("batteryCapacityPath not found");
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if (!gPaths.batteryVoltagePath)
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LOGE("batteryVoltagePath not found");
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if (!gPaths.batteryTemperaturePath)
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LOGE("batteryTemperaturePath not found");
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if (!gPaths.batteryTechnologyPath)
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LOGE("batteryTechnologyPath not found");
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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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gConstants.healthCold = env->GetStaticIntField(clazz,
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env->GetStaticFieldID(clazz, "BATTERY_HEALTH_COLD", "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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