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 <cutils/properties.h>
31#include <sys/types.h>
32#include <utils/Errors.h>
33#include <utils/String8.h>
34#include <utils/Vector.h>
35
36#define POWER_SUPPLY_SUBSYSTEM "power_supply"
37#define POWER_SUPPLY_SYSFS_PATH "/sys/class/" POWER_SUPPLY_SUBSYSTEM
38#define FAKE_BATTERY_CAPACITY 42
39#define FAKE_BATTERY_TEMPERATURE 424
40
41namespace android {
42
43struct sysfsStringEnumMap {
44    const char* s;
45    int val;
46};
47
48static int mapSysfsString(const char* str,
49                          struct sysfsStringEnumMap map[]) {
50    for (int i = 0; map[i].s; i++)
51        if (!strcmp(str, map[i].s))
52            return map[i].val;
53
54    return -1;
55}
56
57int BatteryMonitor::getBatteryStatus(const char* status) {
58    int ret;
59    struct sysfsStringEnumMap batteryStatusMap[] = {
60        { "Unknown", BATTERY_STATUS_UNKNOWN },
61        { "Charging", BATTERY_STATUS_CHARGING },
62        { "Discharging", BATTERY_STATUS_DISCHARGING },
63        { "Not charging", BATTERY_STATUS_NOT_CHARGING },
64        { "Full", BATTERY_STATUS_FULL },
65        { NULL, 0 },
66    };
67
68    ret = mapSysfsString(status, batteryStatusMap);
69    if (ret < 0) {
70        KLOG_WARNING(LOG_TAG, "Unknown battery status '%s'\n", status);
71        ret = BATTERY_STATUS_UNKNOWN;
72    }
73
74    return ret;
75}
76
77int BatteryMonitor::getBatteryHealth(const char* status) {
78    int ret;
79    struct sysfsStringEnumMap batteryHealthMap[] = {
80        { "Unknown", BATTERY_HEALTH_UNKNOWN },
81        { "Good", BATTERY_HEALTH_GOOD },
82        { "Overheat", BATTERY_HEALTH_OVERHEAT },
83        { "Dead", BATTERY_HEALTH_DEAD },
84        { "Over voltage", BATTERY_HEALTH_OVER_VOLTAGE },
85        { "Unspecified failure", BATTERY_HEALTH_UNSPECIFIED_FAILURE },
86        { "Cold", BATTERY_HEALTH_COLD },
87        { NULL, 0 },
88    };
89
90    ret = mapSysfsString(status, batteryHealthMap);
91    if (ret < 0) {
92        KLOG_WARNING(LOG_TAG, "Unknown battery health '%s'\n", status);
93        ret = BATTERY_HEALTH_UNKNOWN;
94    }
95
96    return ret;
97}
98
99int BatteryMonitor::readFromFile(const String8& path, char* buf, size_t size) {
100    char *cp = NULL;
101
102    if (path.isEmpty())
103        return -1;
104    int fd = open(path.string(), O_RDONLY, 0);
105    if (fd == -1) {
106        KLOG_ERROR(LOG_TAG, "Could not open '%s'\n", path.string());
107        return -1;
108    }
109
110    ssize_t count = TEMP_FAILURE_RETRY(read(fd, buf, size));
111    if (count > 0)
112            cp = (char *)memrchr(buf, '\n', count);
113
114    if (cp)
115        *cp = '\0';
116    else
117        buf[0] = '\0';
118
119    close(fd);
120    return count;
121}
122
123BatteryMonitor::PowerSupplyType BatteryMonitor::readPowerSupplyType(const String8& path) {
124    const int SIZE = 128;
125    char buf[SIZE];
126    int length = readFromFile(path, buf, SIZE);
127    BatteryMonitor::PowerSupplyType ret;
128    struct sysfsStringEnumMap supplyTypeMap[] = {
129            { "Unknown", ANDROID_POWER_SUPPLY_TYPE_UNKNOWN },
130            { "Battery", ANDROID_POWER_SUPPLY_TYPE_BATTERY },
131            { "UPS", ANDROID_POWER_SUPPLY_TYPE_AC },
132            { "Mains", ANDROID_POWER_SUPPLY_TYPE_AC },
133            { "USB", ANDROID_POWER_SUPPLY_TYPE_USB },
134            { "USB_DCP", ANDROID_POWER_SUPPLY_TYPE_AC },
135            { "USB_CDP", ANDROID_POWER_SUPPLY_TYPE_AC },
136            { "USB_ACA", ANDROID_POWER_SUPPLY_TYPE_AC },
137            { "Wireless", ANDROID_POWER_SUPPLY_TYPE_WIRELESS },
138            { NULL, 0 },
139    };
140
141    if (length <= 0)
142        return ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
143
144    ret = (BatteryMonitor::PowerSupplyType)mapSysfsString(buf, supplyTypeMap);
145    if (ret < 0)
146        ret = ANDROID_POWER_SUPPLY_TYPE_UNKNOWN;
147
148    return ret;
149}
150
151bool BatteryMonitor::getBooleanField(const String8& path) {
152    const int SIZE = 16;
153    char buf[SIZE];
154
155    bool value = false;
156    if (readFromFile(path, buf, SIZE) > 0) {
157        if (buf[0] != '0') {
158            value = true;
159        }
160    }
161
162    return value;
163}
164
165int BatteryMonitor::getIntField(const String8& path) {
166    const int SIZE = 128;
167    char buf[SIZE];
168
169    int value = 0;
170    if (readFromFile(path, buf, SIZE) > 0) {
171        value = strtol(buf, NULL, 0);
172    }
173    return value;
174}
175
176bool BatteryMonitor::update(void) {
177    bool logthis;
178
179    props.chargerAcOnline = false;
180    props.chargerUsbOnline = false;
181    props.chargerWirelessOnline = false;
182    props.batteryStatus = BATTERY_STATUS_UNKNOWN;
183    props.batteryHealth = BATTERY_HEALTH_UNKNOWN;
184
185    if (!mHealthdConfig->batteryPresentPath.isEmpty())
186        props.batteryPresent = getBooleanField(mHealthdConfig->batteryPresentPath);
187    else
188        props.batteryPresent = mBatteryDevicePresent;
189
190    props.batteryLevel = mBatteryFixedCapacity ?
191        mBatteryFixedCapacity :
192        getIntField(mHealthdConfig->batteryCapacityPath);
193    props.batteryVoltage = getIntField(mHealthdConfig->batteryVoltagePath) / 1000;
194
195    props.batteryTemperature = mBatteryFixedTemperature ?
196        mBatteryFixedTemperature :
197        getIntField(mHealthdConfig->batteryTemperaturePath);
198
199    const int SIZE = 128;
200    char buf[SIZE];
201    String8 btech;
202
203    if (readFromFile(mHealthdConfig->batteryStatusPath, buf, SIZE) > 0)
204        props.batteryStatus = getBatteryStatus(buf);
205
206    if (readFromFile(mHealthdConfig->batteryHealthPath, buf, SIZE) > 0)
207        props.batteryHealth = getBatteryHealth(buf);
208
209    if (readFromFile(mHealthdConfig->batteryTechnologyPath, buf, SIZE) > 0)
210        props.batteryTechnology = String8(buf);
211
212    unsigned int i;
213
214    for (i = 0; i < mChargerNames.size(); i++) {
215        String8 path;
216        path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH,
217                          mChargerNames[i].string());
218
219        if (readFromFile(path, buf, SIZE) > 0) {
220            if (buf[0] != '0') {
221                path.clear();
222                path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH,
223                                  mChargerNames[i].string());
224                switch(readPowerSupplyType(path)) {
225                case ANDROID_POWER_SUPPLY_TYPE_AC:
226                    props.chargerAcOnline = true;
227                    break;
228                case ANDROID_POWER_SUPPLY_TYPE_USB:
229                    props.chargerUsbOnline = true;
230                    break;
231                case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
232                    props.chargerWirelessOnline = true;
233                    break;
234                default:
235                    KLOG_WARNING(LOG_TAG, "%s: Unknown power supply type\n",
236                                 mChargerNames[i].string());
237                }
238            }
239        }
240    }
241
242    logthis = !healthd_board_battery_update(&props);
243
244    if (logthis) {
245        char dmesgline[256];
246
247        if (props.batteryPresent) {
248            snprintf(dmesgline, sizeof(dmesgline),
249                 "battery l=%d v=%d t=%s%d.%d h=%d st=%d",
250                 props.batteryLevel, props.batteryVoltage,
251                 props.batteryTemperature < 0 ? "-" : "",
252                 abs(props.batteryTemperature / 10),
253                 abs(props.batteryTemperature % 10), props.batteryHealth,
254                 props.batteryStatus);
255
256            if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
257                int c = getIntField(mHealthdConfig->batteryCurrentNowPath);
258                char b[20];
259
260                snprintf(b, sizeof(b), " c=%d", c / 1000);
261                strlcat(dmesgline, b, sizeof(dmesgline));
262            }
263        } else {
264            snprintf(dmesgline, sizeof(dmesgline),
265                 "battery none");
266        }
267
268        KLOG_WARNING(LOG_TAG, "%s chg=%s%s%s\n", dmesgline,
269                     props.chargerAcOnline ? "a" : "",
270                     props.chargerUsbOnline ? "u" : "",
271                     props.chargerWirelessOnline ? "w" : "");
272    }
273
274    healthd_mode_ops->battery_update(&props);
275    return props.chargerAcOnline | props.chargerUsbOnline |
276            props.chargerWirelessOnline;
277}
278
279status_t BatteryMonitor::getProperty(int id, struct BatteryProperty *val) {
280    status_t ret = BAD_VALUE;
281
282    val->valueInt64 = LONG_MIN;
283
284    switch(id) {
285    case BATTERY_PROP_CHARGE_COUNTER:
286        if (!mHealthdConfig->batteryChargeCounterPath.isEmpty()) {
287            val->valueInt64 =
288                getIntField(mHealthdConfig->batteryChargeCounterPath);
289            ret = NO_ERROR;
290        } else {
291            ret = NAME_NOT_FOUND;
292        }
293        break;
294
295    case BATTERY_PROP_CURRENT_NOW:
296        if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
297            val->valueInt64 =
298                getIntField(mHealthdConfig->batteryCurrentNowPath);
299            ret = NO_ERROR;
300        } else {
301            ret = NAME_NOT_FOUND;
302        }
303        break;
304
305    case BATTERY_PROP_CURRENT_AVG:
306        if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty()) {
307            val->valueInt64 =
308                getIntField(mHealthdConfig->batteryCurrentAvgPath);
309            ret = NO_ERROR;
310        } else {
311            ret = NAME_NOT_FOUND;
312        }
313        break;
314
315    case BATTERY_PROP_CAPACITY:
316        if (!mHealthdConfig->batteryCapacityPath.isEmpty()) {
317            val->valueInt64 =
318                getIntField(mHealthdConfig->batteryCapacityPath);
319            ret = NO_ERROR;
320        } else {
321            ret = NAME_NOT_FOUND;
322        }
323        break;
324
325    case BATTERY_PROP_ENERGY_COUNTER:
326        if (mHealthdConfig->energyCounter) {
327            ret = mHealthdConfig->energyCounter(&val->valueInt64);
328        } else {
329            ret = NAME_NOT_FOUND;
330        }
331        break;
332
333    default:
334        break;
335    }
336
337    return ret;
338}
339
340void BatteryMonitor::dumpState(int fd) {
341    int v;
342    char vs[128];
343
344    snprintf(vs, sizeof(vs), "ac: %d usb: %d wireless: %d\n",
345             props.chargerAcOnline, props.chargerUsbOnline,
346             props.chargerWirelessOnline);
347    write(fd, vs, strlen(vs));
348    snprintf(vs, sizeof(vs), "status: %d health: %d present: %d\n",
349             props.batteryStatus, props.batteryHealth, props.batteryPresent);
350    write(fd, vs, strlen(vs));
351    snprintf(vs, sizeof(vs), "level: %d voltage: %d temp: %d\n",
352             props.batteryLevel, props.batteryVoltage,
353             props.batteryTemperature);
354    write(fd, vs, strlen(vs));
355
356    if (!mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
357        v = getIntField(mHealthdConfig->batteryCurrentNowPath);
358        snprintf(vs, sizeof(vs), "current now: %d\n", v);
359        write(fd, vs, strlen(vs));
360    }
361
362    if (!mHealthdConfig->batteryCurrentAvgPath.isEmpty()) {
363        v = getIntField(mHealthdConfig->batteryCurrentAvgPath);
364        snprintf(vs, sizeof(vs), "current avg: %d\n", v);
365        write(fd, vs, strlen(vs));
366    }
367
368    if (!mHealthdConfig->batteryChargeCounterPath.isEmpty()) {
369        v = getIntField(mHealthdConfig->batteryChargeCounterPath);
370        snprintf(vs, sizeof(vs), "charge counter: %d\n", v);
371        write(fd, vs, strlen(vs));
372    }
373}
374
375void BatteryMonitor::init(struct healthd_config *hc) {
376    String8 path;
377    char pval[PROPERTY_VALUE_MAX];
378
379    mHealthdConfig = hc;
380    DIR* dir = opendir(POWER_SUPPLY_SYSFS_PATH);
381    if (dir == NULL) {
382        KLOG_ERROR(LOG_TAG, "Could not open %s\n", POWER_SUPPLY_SYSFS_PATH);
383    } else {
384        struct dirent* entry;
385
386        while ((entry = readdir(dir))) {
387            const char* name = entry->d_name;
388
389            if (!strcmp(name, ".") || !strcmp(name, ".."))
390                continue;
391
392            // Look for "type" file in each subdirectory
393            path.clear();
394            path.appendFormat("%s/%s/type", POWER_SUPPLY_SYSFS_PATH, name);
395            switch(readPowerSupplyType(path)) {
396            case ANDROID_POWER_SUPPLY_TYPE_AC:
397            case ANDROID_POWER_SUPPLY_TYPE_USB:
398            case ANDROID_POWER_SUPPLY_TYPE_WIRELESS:
399                path.clear();
400                path.appendFormat("%s/%s/online", POWER_SUPPLY_SYSFS_PATH, name);
401                if (access(path.string(), R_OK) == 0)
402                    mChargerNames.add(String8(name));
403                break;
404
405            case ANDROID_POWER_SUPPLY_TYPE_BATTERY:
406                mBatteryDevicePresent = true;
407
408                if (mHealthdConfig->batteryStatusPath.isEmpty()) {
409                    path.clear();
410                    path.appendFormat("%s/%s/status", POWER_SUPPLY_SYSFS_PATH,
411                                      name);
412                    if (access(path, R_OK) == 0)
413                        mHealthdConfig->batteryStatusPath = path;
414                }
415
416                if (mHealthdConfig->batteryHealthPath.isEmpty()) {
417                    path.clear();
418                    path.appendFormat("%s/%s/health", POWER_SUPPLY_SYSFS_PATH,
419                                      name);
420                    if (access(path, R_OK) == 0)
421                        mHealthdConfig->batteryHealthPath = path;
422                }
423
424                if (mHealthdConfig->batteryPresentPath.isEmpty()) {
425                    path.clear();
426                    path.appendFormat("%s/%s/present", POWER_SUPPLY_SYSFS_PATH,
427                                      name);
428                    if (access(path, R_OK) == 0)
429                        mHealthdConfig->batteryPresentPath = path;
430                }
431
432                if (mHealthdConfig->batteryCapacityPath.isEmpty()) {
433                    path.clear();
434                    path.appendFormat("%s/%s/capacity", POWER_SUPPLY_SYSFS_PATH,
435                                      name);
436                    if (access(path, R_OK) == 0)
437                        mHealthdConfig->batteryCapacityPath = path;
438                }
439
440                if (mHealthdConfig->batteryVoltagePath.isEmpty()) {
441                    path.clear();
442                    path.appendFormat("%s/%s/voltage_now",
443                                      POWER_SUPPLY_SYSFS_PATH, name);
444                    if (access(path, R_OK) == 0) {
445                        mHealthdConfig->batteryVoltagePath = path;
446                    } else {
447                        path.clear();
448                        path.appendFormat("%s/%s/batt_vol",
449                                          POWER_SUPPLY_SYSFS_PATH, name);
450                        if (access(path, R_OK) == 0)
451                            mHealthdConfig->batteryVoltagePath = path;
452                    }
453                }
454
455                if (mHealthdConfig->batteryCurrentNowPath.isEmpty()) {
456                    path.clear();
457                    path.appendFormat("%s/%s/current_now",
458                                      POWER_SUPPLY_SYSFS_PATH, name);
459                    if (access(path, R_OK) == 0)
460                        mHealthdConfig->batteryCurrentNowPath = path;
461                }
462
463                if (mHealthdConfig->batteryCurrentAvgPath.isEmpty()) {
464                    path.clear();
465                    path.appendFormat("%s/%s/current_avg",
466                                      POWER_SUPPLY_SYSFS_PATH, name);
467                    if (access(path, R_OK) == 0)
468                        mHealthdConfig->batteryCurrentAvgPath = path;
469                }
470
471                if (mHealthdConfig->batteryChargeCounterPath.isEmpty()) {
472                    path.clear();
473                    path.appendFormat("%s/%s/charge_counter",
474                                      POWER_SUPPLY_SYSFS_PATH, name);
475                    if (access(path, R_OK) == 0)
476                        mHealthdConfig->batteryChargeCounterPath = path;
477                }
478
479                if (mHealthdConfig->batteryTemperaturePath.isEmpty()) {
480                    path.clear();
481                    path.appendFormat("%s/%s/temp", POWER_SUPPLY_SYSFS_PATH,
482                                      name);
483                    if (access(path, R_OK) == 0) {
484                        mHealthdConfig->batteryTemperaturePath = path;
485                    } else {
486                        path.clear();
487                        path.appendFormat("%s/%s/batt_temp",
488                                          POWER_SUPPLY_SYSFS_PATH, name);
489                        if (access(path, R_OK) == 0)
490                            mHealthdConfig->batteryTemperaturePath = path;
491                    }
492                }
493
494                if (mHealthdConfig->batteryTechnologyPath.isEmpty()) {
495                    path.clear();
496                    path.appendFormat("%s/%s/technology",
497                                      POWER_SUPPLY_SYSFS_PATH, name);
498                    if (access(path, R_OK) == 0)
499                        mHealthdConfig->batteryTechnologyPath = path;
500                }
501
502                break;
503
504            case ANDROID_POWER_SUPPLY_TYPE_UNKNOWN:
505                break;
506            }
507        }
508        closedir(dir);
509    }
510
511    if (!mChargerNames.size())
512        KLOG_ERROR(LOG_TAG, "No charger supplies found\n");
513    if (!mBatteryDevicePresent) {
514        KLOG_WARNING(LOG_TAG, "No battery devices found\n");
515        hc->periodic_chores_interval_fast = -1;
516        hc->periodic_chores_interval_slow = -1;
517    } else {
518        if (mHealthdConfig->batteryStatusPath.isEmpty())
519            KLOG_WARNING(LOG_TAG, "BatteryStatusPath not found\n");
520        if (mHealthdConfig->batteryHealthPath.isEmpty())
521            KLOG_WARNING(LOG_TAG, "BatteryHealthPath not found\n");
522        if (mHealthdConfig->batteryPresentPath.isEmpty())
523            KLOG_WARNING(LOG_TAG, "BatteryPresentPath not found\n");
524        if (mHealthdConfig->batteryCapacityPath.isEmpty())
525            KLOG_WARNING(LOG_TAG, "BatteryCapacityPath not found\n");
526        if (mHealthdConfig->batteryVoltagePath.isEmpty())
527            KLOG_WARNING(LOG_TAG, "BatteryVoltagePath not found\n");
528        if (mHealthdConfig->batteryTemperaturePath.isEmpty())
529            KLOG_WARNING(LOG_TAG, "BatteryTemperaturePath not found\n");
530        if (mHealthdConfig->batteryTechnologyPath.isEmpty())
531            KLOG_WARNING(LOG_TAG, "BatteryTechnologyPath not found\n");
532    }
533
534    if (property_get("ro.boot.fake_battery", pval, NULL) > 0
535                                               && strtol(pval, NULL, 10) != 0) {
536        mBatteryFixedCapacity = FAKE_BATTERY_CAPACITY;
537        mBatteryFixedTemperature = FAKE_BATTERY_TEMPERATURE;
538    }
539}
540
541}; // namespace android
542