BatteryMonitor.cpp revision 8f132af495d208272ea55d0ca24068926fa80e51
1/* 2 * Copyright (C) 2013 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 "healthd" 18 19#include "healthd.h" 20#include "BatteryMonitor.h" 21 22#include <dirent.h> 23#include <errno.h> 24#include <fcntl.h> 25#include <stdio.h> 26#include <stdlib.h> 27#include <unistd.h> 28#include <batteryservice/BatteryService.h> 29#include <cutils/klog.h> 30#include <utils/Errors.h> 31#include <utils/String8.h> 32#include <utils/Vector.h> 33 34#define POWER_SUPPLY_SUBSYSTEM "power_supply" 35#define POWER_SUPPLY_SYSFS_PATH "/sys/class/" POWER_SUPPLY_SUBSYSTEM 36 37namespace android { 38 39struct sysfsStringEnumMap { 40 const char* s; 41 int val; 42}; 43 44static int mapSysfsString(const char* str, 45 struct sysfsStringEnumMap map[]) { 46 for (int i = 0; map[i].s; i++) 47 if (!strcmp(str, map[i].s)) 48 return map[i].val; 49 50 return -1; 51} 52 53int BatteryMonitor::getBatteryStatus(const char* status) { 54 int ret; 55 struct sysfsStringEnumMap batteryStatusMap[] = { 56 { "Unknown", BATTERY_STATUS_UNKNOWN }, 57 { "Charging", BATTERY_STATUS_CHARGING }, 58 { "Discharging", BATTERY_STATUS_DISCHARGING }, 59 { "Not charging", BATTERY_STATUS_NOT_CHARGING }, 60 { "Full", BATTERY_STATUS_FULL }, 61 { NULL, 0 }, 62 }; 63 64 ret = mapSysfsString(status, batteryStatusMap); 65 if (ret < 0) { 66 KLOG_WARNING(LOG_TAG, "Unknown battery status '%s'\n", status); 67 ret = BATTERY_STATUS_UNKNOWN; 68 } 69 70 return ret; 71} 72 73int BatteryMonitor::getBatteryHealth(const char* status) { 74 int ret; 75 struct sysfsStringEnumMap batteryHealthMap[] = { 76 { "Unknown", BATTERY_HEALTH_UNKNOWN }, 77 { "Good", BATTERY_HEALTH_GOOD }, 78 { "Overheat", BATTERY_HEALTH_OVERHEAT }, 79 { "Dead", BATTERY_HEALTH_DEAD }, 80 { "Over voltage", BATTERY_HEALTH_OVER_VOLTAGE }, 81 { "Unspecified failure", BATTERY_HEALTH_UNSPECIFIED_FAILURE }, 82 { "Cold", BATTERY_HEALTH_COLD }, 83 { NULL, 0 }, 84 }; 85 86 ret = mapSysfsString(status, batteryHealthMap); 87 if (ret < 0) { 88 KLOG_WARNING(LOG_TAG, "Unknown battery health '%s'\n", status); 89 ret = BATTERY_HEALTH_UNKNOWN; 90 } 91 92 return ret; 93} 94 95int BatteryMonitor::readFromFile(const String8& path, char* buf, size_t size) { 96 char *cp = NULL; 97 98 if (path.isEmpty()) 99 return -1; 100 int fd = open(path.string(), O_RDONLY, 0); 101 if (fd == -1) { 102 KLOG_ERROR(LOG_TAG, "Could not open '%s'\n", path.string()); 103 return -1; 104 } 105 106 ssize_t count = TEMP_FAILURE_RETRY(read(fd, buf, size)); 107 if (count > 0) 108 cp = (char *)memrchr(buf, '\n', count); 109 110 if (cp) 111 *cp = '\0'; 112 else 113 buf[0] = '\0'; 114 115 close(fd); 116 return count; 117} 118 119BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String8& path) { 120 const int SIZE = 128; 121 char buf[SIZE]; 122 int length = readFromFile(path, buf, SIZE); 123 BatteryMonitor::PowerSupplyType ret; 124 struct sysfsStringEnumMap supplyTypeMap[] = { 125 { "Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN }, 126 { "Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY }, 127 { "UPS", ANDROID_POWER_SUPPLY_TYPE_AC }, 128 { "Mains", ANDROID_POWER_SUPPLY_TYPE_AC }, 129 { "USB", ANDROID_POWER_SUPPLY_TYPE_USB }, 130 { "USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC }, 131 { "USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC }, 132 { "USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC }, 133 { "Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS }, 134 { NULL, 0 }, 135 }; 136 137 if (length <= 0) 138 return ANDROID_POWER_SUPPLY_TYPE_UNKNOWN; 139 140 ret = (BatteryMonitor::PowerSupplyType)mapSysfsString(buf, supplyTypeMap); 141 if (ret < 0) 142 ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN; 143 144 return ret; 145} 146 147bool BatteryMonitor::getBooleanField(const String8& path) { 148 const int SIZE = 16; 149 char buf[SIZE]; 150 151 bool value = false; 152 if (readFromFile(path, buf, SIZE) > 0) { 153 if (buf[0] != '0') { 154 value = true; 155 } 156 } 157 158 return value; 159} 160 161int BatteryMonitor::getIntField(const String8& path) { 162 const int SIZE = 128; 163 char buf[SIZE]; 164 165 int value = 0; 166 if (readFromFile(path, buf, SIZE) > 0) { 167 value = strtol(buf, NULL, 0); 168 } 169 return value; 170} 171 172bool BatteryMonitor::update(void) { 173 bool logthis; 174 175 props.chargerAcOnline = false; 176 props.chargerUsbOnline = false; 177 props.chargerWirelessOnline = false; 178 props.batteryStatus = BATTERY_STATUS_UNKNOWN; 179 props.batteryHealth = BATTERY_HEALTH_UNKNOWN; 180 181 if (!mHealthdConfig->batteryPresentPath.isEmpty()) 182 props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath); 183 else 184 props.batteryPresent = mBatteryDevicePresent; 185 186 props.batteryLevel = getIntField(mHealthdConfig->batteryCapacityPath); 187 props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000; 188 189 props.batteryTemperature = getIntField(mHealthdConfig->batteryTemperaturePath); 190 191 const int SIZE = 128; 192 char buf[SIZE]; 193 String8 btech; 194 195 if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0) 196 props.batteryStatus = getBatteryStatus(buf); 197 198 if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0) 199 props.batteryHealth = getBatteryHealth(buf); 200 201 if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0) 202 props.batteryTechnology = String8(buf); 203 204 unsigned int i; 205 206 for (i = 0; i < mChargerNames.size(); i++) { 207 String8 path; 208 path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, 209 mChargerNames[i].string()); 210 211 if (readFromFile(path, buf, SIZE) > 0) { 212 if (buf[0] != '0') { 213 path.clear(); 214 path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, 215 mChargerNames[i].string()); 216 switch(readPowerSupplyType(path)) { 217 case ANDROID_POWER_SUPPLY_TYPE_AC: 218 props.chargerAcOnline = true; 219 break; 220 case ANDROID_POWER_SUPPLY_TYPE_USB: 221 props.chargerUsbOnline = true; 222 break; 223 case ANDROID_POWER_SUPPLY_TYPE_WIRELESS: 224 props.chargerWirelessOnline = true; 225 break; 226 default: 227 KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n", 228 mChargerNames[i].string()); 229 } 230 } 231 } 232 } 233 234 logthis = !healthd_board_battery_update(&props); 235 236 if (logthis) { 237 char dmesgline[256]; 238 239 if (props.batteryPresent) { 240 snprintf(dmesgline, sizeof(dmesgline), 241 "battery l=%d v=%d t=%s%d.%d h=%d st=%d", 242 props.batteryLevel, props.batteryVoltage, 243 props.batteryTemperature < 0 ? "-" : "", 244 abs(props.batteryTemperature / 10), 245 abs(props.batteryTemperature % 10), props.batteryHealth, 246 props.batteryStatus); 247 248 if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) { 249 int c = getIntField(mHealthdConfig->batteryCurrentNowPath); 250 char b[20]; 251 252 snprintf(b, sizeof(b), " c=%d", c / 1000); 253 strlcat(dmesgline, b, sizeof(dmesgline)); 254 } 255 } else { 256 snprintf(dmesgline, sizeof(dmesgline), 257 "battery none"); 258 } 259 260 KLOG_INFO(LOG_TAG, "%s chg=%s%s%s\n", dmesgline, 261 props.chargerAcOnline ? "a" : "", 262 props.chargerUsbOnline ? "u" : "", 263 props.chargerWirelessOnline ? "w" : ""); 264 } 265 266 healthd_mode_ops->battery_update(&props); 267 return props.chargerAcOnline | props.chargerUsbOnline | 268 props.chargerWirelessOnline; 269} 270 271status_t BatteryMonitor::getProperty(int id, struct BatteryProperty *val) { 272 status_t ret = BAD_VALUE; 273 274 val->valueInt64 = LONG_MIN; 275 276 switch(id) { 277 case BATTERY_PROP_CHARGE_COUNTER: 278 if (!mHealthdConfig->batteryChargeCounterPath.isEmpty()) { 279 val->valueInt64 = 280 getIntField(mHealthdConfig->batteryChargeCounterPath); 281 ret = NO_ERROR; 282 } else { 283 ret = NAME_NOT_FOUND; 284 } 285 break; 286 287 case BATTERY_PROP_CURRENT_NOW: 288 if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) { 289 val->valueInt64 = 290 getIntField(mHealthdConfig->batteryCurrentNowPath); 291 ret = NO_ERROR; 292 } else { 293 ret = NAME_NOT_FOUND; 294 } 295 break; 296 297 case BATTERY_PROP_CURRENT_AVG: 298 if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty()) { 299 val->valueInt64 = 300 getIntField(mHealthdConfig->batteryCurrentAvgPath); 301 ret = NO_ERROR; 302 } else { 303 ret = NAME_NOT_FOUND; 304 } 305 break; 306 307 case BATTERY_PROP_CAPACITY: 308 if (!mHealthdConfig->batteryCapacityPath.isEmpty()) { 309 val->valueInt64 = 310 getIntField(mHealthdConfig->batteryCapacityPath); 311 ret = NO_ERROR; 312 } else { 313 ret = NAME_NOT_FOUND; 314 } 315 break; 316 317 case BATTERY_PROP_ENERGY_COUNTER: 318 ret = NAME_NOT_FOUND; 319 break; 320 321 default: 322 break; 323 } 324 325 return ret; 326} 327 328void BatteryMonitor::dumpState(int fd) { 329 int v; 330 char vs[128]; 331 332 snprintf(vs, sizeof(vs), "ac: %d usb: %d wireless: %d\n", 333 props.chargerAcOnline, props.chargerUsbOnline, 334 props.chargerWirelessOnline); 335 write(fd, vs, strlen(vs)); 336 snprintf(vs, sizeof(vs), "status: %d health: %d present: %d\n", 337 props.batteryStatus, props.batteryHealth, props.batteryPresent); 338 write(fd, vs, strlen(vs)); 339 snprintf(vs, sizeof(vs), "level: %d voltage: %d temp: %d\n", 340 props.batteryLevel, props.batteryVoltage, 341 props.batteryTemperature); 342 write(fd, vs, strlen(vs)); 343 344 if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) { 345 v = getIntField(mHealthdConfig->batteryCurrentNowPath); 346 snprintf(vs, sizeof(vs), "current now: %d\n", v); 347 write(fd, vs, strlen(vs)); 348 } 349 350 if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty()) { 351 v = getIntField(mHealthdConfig->batteryCurrentAvgPath); 352 snprintf(vs, sizeof(vs), "current avg: %d\n", v); 353 write(fd, vs, strlen(vs)); 354 } 355 356 if (!mHealthdConfig->batteryChargeCounterPath.isEmpty()) { 357 v = getIntField(mHealthdConfig->batteryChargeCounterPath); 358 snprintf(vs, sizeof(vs), "charge counter: %d\n", v); 359 write(fd, vs, strlen(vs)); 360 } 361} 362 363void BatteryMonitor::init(struct healthd_config *hc) { 364 String8 path; 365 366 mHealthdConfig = hc; 367 DIR* dir = opendir(POWER_SUPPLY_SYSFS_PATH); 368 if (dir == NULL) { 369 KLOG_ERROR(LOG_TAG, "Could not open %s\n", POWER_SUPPLY_SYSFS_PATH); 370 } else { 371 struct dirent* entry; 372 373 while ((entry = readdir(dir))) { 374 const char* name = entry->d_name; 375 376 if (!strcmp(name, ".") || !strcmp(name, "..")) 377 continue; 378 379 char buf[20]; 380 // Look for "type" file in each subdirectory 381 path.clear(); 382 path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, name); 383 switch(readPowerSupplyType(path)) { 384 case ANDROID_POWER_SUPPLY_TYPE_AC: 385 case ANDROID_POWER_SUPPLY_TYPE_USB: 386 case ANDROID_POWER_SUPPLY_TYPE_WIRELESS: 387 path.clear(); 388 path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, name); 389 if (access(path.string(), R_OK) == 0) 390 mChargerNames.add(String8(name)); 391 break; 392 393 case ANDROID_POWER_SUPPLY_TYPE_BATTERY: 394 mBatteryDevicePresent = true; 395 396 if (mHealthdConfig->batteryStatusPath.isEmpty()) { 397 path.clear(); 398 path.appendFormat("%s/%s/status", POWER_SUPPLY_SYSFS_PATH, 399 name); 400 if (access(path, R_OK) == 0) 401 mHealthdConfig->batteryStatusPath = path; 402 } 403 404 if (mHealthdConfig->batteryHealthPath.isEmpty()) { 405 path.clear(); 406 path.appendFormat("%s/%s/health", POWER_SUPPLY_SYSFS_PATH, 407 name); 408 if (access(path, R_OK) == 0) 409 mHealthdConfig->batteryHealthPath = path; 410 } 411 412 if (mHealthdConfig->batteryPresentPath.isEmpty()) { 413 path.clear(); 414 path.appendFormat("%s/%s/present", POWER_SUPPLY_SYSFS_PATH, 415 name); 416 if (access(path, R_OK) == 0) 417 mHealthdConfig->batteryPresentPath = path; 418 } 419 420 if (mHealthdConfig->batteryCapacityPath.isEmpty()) { 421 path.clear(); 422 path.appendFormat("%s/%s/capacity", POWER_SUPPLY_SYSFS_PATH, 423 name); 424 if (access(path, R_OK) == 0) 425 mHealthdConfig->batteryCapacityPath = path; 426 } 427 428 if (mHealthdConfig->batteryVoltagePath.isEmpty()) { 429 path.clear(); 430 path.appendFormat("%s/%s/voltage_now", 431 POWER_SUPPLY_SYSFS_PATH, name); 432 if (access(path, R_OK) == 0) { 433 mHealthdConfig->batteryVoltagePath = path; 434 } else { 435 path.clear(); 436 path.appendFormat("%s/%s/batt_vol", 437 POWER_SUPPLY_SYSFS_PATH, name); 438 if (access(path, R_OK) == 0) 439 mHealthdConfig->batteryVoltagePath = path; 440 } 441 } 442 443 if (mHealthdConfig->batteryCurrentNowPath.isEmpty()) { 444 path.clear(); 445 path.appendFormat("%s/%s/current_now", 446 POWER_SUPPLY_SYSFS_PATH, name); 447 if (access(path, R_OK) == 0) 448 mHealthdConfig->batteryCurrentNowPath = path; 449 } 450 451 if (mHealthdConfig->batteryCurrentAvgPath.isEmpty()) { 452 path.clear(); 453 path.appendFormat("%s/%s/current_avg", 454 POWER_SUPPLY_SYSFS_PATH, name); 455 if (access(path, R_OK) == 0) 456 mHealthdConfig->batteryCurrentAvgPath = path; 457 } 458 459 if (mHealthdConfig->batteryChargeCounterPath.isEmpty()) { 460 path.clear(); 461 path.appendFormat("%s/%s/charge_counter", 462 POWER_SUPPLY_SYSFS_PATH, name); 463 if (access(path, R_OK) == 0) 464 mHealthdConfig->batteryChargeCounterPath = path; 465 } 466 467 if (mHealthdConfig->batteryTemperaturePath.isEmpty()) { 468 path.clear(); 469 path.appendFormat("%s/%s/temp", POWER_SUPPLY_SYSFS_PATH, 470 name); 471 if (access(path, R_OK) == 0) { 472 mHealthdConfig->batteryTemperaturePath = path; 473 } else { 474 path.clear(); 475 path.appendFormat("%s/%s/batt_temp", 476 POWER_SUPPLY_SYSFS_PATH, name); 477 if (access(path, R_OK) == 0) 478 mHealthdConfig->batteryTemperaturePath = path; 479 } 480 } 481 482 if (mHealthdConfig->batteryTechnologyPath.isEmpty()) { 483 path.clear(); 484 path.appendFormat("%s/%s/technology", 485 POWER_SUPPLY_SYSFS_PATH, name); 486 if (access(path, R_OK) == 0) 487 mHealthdConfig->batteryTechnologyPath = path; 488 } 489 490 break; 491 492 case ANDROID_POWER_SUPPLY_TYPE_UNKNOWN: 493 break; 494 } 495 } 496 closedir(dir); 497 } 498 499 if (!mChargerNames.size()) 500 KLOG_ERROR(LOG_TAG, "No charger supplies found\n"); 501 if (!mBatteryDevicePresent) { 502 KLOG_INFO(LOG_TAG, "No battery devices found\n"); 503 hc->periodic_chores_interval_fast = -1; 504 hc->periodic_chores_interval_slow = -1; 505 } else { 506 if (mHealthdConfig->batteryStatusPath.isEmpty()) 507 KLOG_WARNING(LOG_TAG, "BatteryStatusPath not found\n"); 508 if (mHealthdConfig->batteryHealthPath.isEmpty()) 509 KLOG_WARNING(LOG_TAG, "BatteryHealthPath not found\n"); 510 if (mHealthdConfig->batteryPresentPath.isEmpty()) 511 KLOG_WARNING(LOG_TAG, "BatteryPresentPath not found\n"); 512 if (mHealthdConfig->batteryCapacityPath.isEmpty()) 513 KLOG_WARNING(LOG_TAG, "BatteryCapacityPath not found\n"); 514 if (mHealthdConfig->batteryVoltagePath.isEmpty()) 515 KLOG_WARNING(LOG_TAG, "BatteryVoltagePath not found\n"); 516 if (mHealthdConfig->batteryTemperaturePath.isEmpty()) 517 KLOG_WARNING(LOG_TAG, "BatteryTemperaturePath not found\n"); 518 if (mHealthdConfig->batteryTechnologyPath.isEmpty()) 519 KLOG_WARNING(LOG_TAG, "BatteryTechnologyPath not found\n"); 520 } 521} 522 523}; // namespace android 524