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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "pixelstats-uevent: BatteryCapacityFG"
#include <log/log.h>
#include <time.h>
#include <utils/Timers.h>
#include <cmath>
#include <android-base/file.h>
#include <pixelstats/BatteryCapacityReporter.h>
#include <pixelstats/StatsHelper.h>
#include <hardware/google/pixel/pixelstats/pixelatoms.pb.h>
namespace android {
namespace hardware {
namespace google {
namespace pixel {
using aidl::android::frameworks::stats::IStats;
using aidl::android::frameworks::stats::VendorAtom;
using aidl::android::frameworks::stats::VendorAtomValue;
using android::base::ReadFileToString;
using android::hardware::google::pixel::PixelAtoms::BatteryCapacityFG;
#define ONE_HOUR_SECS (60 * 60)
BatteryCapacityReporter::BatteryCapacityReporter() {
// Remove the need for a translation function/table, while removing the dependency on the
// generated <pixelatoms.pb.h> in BatteryCapacityReporter.h.
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_UNKNOWN) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_UNKNOWN));
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_CONNECTED) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_CONNECTED));
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_DISCONNECTED) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_DISCONNECTED));
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_FULL_CHARGE) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_FULL_CHARGE));
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_PERCENT_SKIP) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_PERCENT_SKIP));
static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_DIVERGING_FG) ==
static_cast<int>(BatteryCapacityFG::LOG_REASON_DIVERGING_FG));
}
void BatteryCapacityReporter::checkAndReport(const std::shared_ptr<IStats> &stats_client,
const std::string &path) {
if (parse(path)) {
if (checkLogEvent()) {
reportEvent(stats_client);
}
}
}
int64_t BatteryCapacityReporter::getTimeSecs(void) {
return nanoseconds_to_seconds(systemTime(SYSTEM_TIME_BOOTTIME));
}
bool BatteryCapacityReporter::parse(const std::string &path) {
std::string batterySSOCContents;
if (!ReadFileToString(path, &batterySSOCContents)) {
ALOGE("Unable to read ssoc_details path: %s - %s", path.c_str(), strerror(errno));
return false;
}
// Parse file. Example format:
// soc: l=97% gdf=97.72 uic=97.72 rl=97.72
// curve:[15.00 15.00][97.87 97.87][100.00 100.00]
// status: ct=1 rl=0 s=1
if (sscanf(batterySSOCContents.c_str(),
"soc: %*s gdf=%f %*s rl=%f\n"
"curve:[%*f %*f][%f %f][%*f %*f]\n"
"status: %*s %*s s=%d",
&gdf_, &ssoc_, &gdf_curve_, &ssoc_curve_, &status_) != 5) {
ALOGE("Unable to parse ssoc_details [%s] from file %s to int.", batterySSOCContents.c_str(),
path.c_str());
return false;
}
return true;
}
bool BatteryCapacityReporter::shouldReportEvent(void) {
const int64_t current_time = getTimeSecs();
if (current_time == 0) {
ALOGE("Current boot time is zero!");
return false;
}
/* Perform cleanup of events that are older than 1 hour */
for (int i = 0; i < MAX_LOG_EVENTS_PER_HOUR; i++) {
if (log_event_time_secs_[i] != 0 && /* Non-empty */
log_event_time_secs_[i] + ONE_HOUR_SECS < current_time) {
log_event_time_secs_[i] = 0;
num_events_in_last_hour_--;
}
}
/* Log event if there hasn't been many events in the past hour */
if (num_events_in_last_hour_ < MAX_LOG_EVENTS_PER_HOUR) {
for (int i = 0; i < MAX_LOG_EVENTS_PER_HOUR; i++) {
if (log_event_time_secs_[i] == 0) { /* Empty */
log_event_time_secs_[i] = current_time;
num_events_in_last_hour_++;
return true;
}
}
} else {
ALOGD("Too many log events in past hour; event ignored.");
}
return false;
}
/**
* @return true if a log should be reported, else false
*/
bool BatteryCapacityReporter::checkLogEvent(void) {
LogReason log_reason = LOG_REASON_UNKNOWN;
if (status_previous_ != status_) {
// Handle nominal events
if (status_ == SOC_STATUS_CONNECTED) {
log_reason = LOG_REASON_CONNECTED;
} else if (status_ == SOC_STATUS_DISCONNECTED) {
log_reason = LOG_REASON_DISCONNECTED;
} else if (status_ == SOC_STATUS_FULL) {
log_reason = LOG_REASON_FULL_CHARGE;
}
status_previous_ = status_;
} else {
// Handle abnormal events
const float diff = fabsf(ssoc_ - gdf_);
if (fabsf(ssoc_ - ssoc_previous_) >= 2.0f) {
log_reason = LOG_REASON_PERCENT_SKIP;
// Every +- 1% when above a 4% SOC difference (w/ timer)
} else if (static_cast<int>(round(ssoc_gdf_diff_previous_)) !=
static_cast<int>(round(diff)) &&
diff >= 4.0f) {
log_reason = LOG_REASON_DIVERGING_FG;
ssoc_gdf_diff_previous_ = diff;
}
}
ssoc_previous_ = ssoc_;
log_reason_ = log_reason;
if (log_reason != LOG_REASON_UNKNOWN) {
/* Found new log event! */
/* Check if we should actually report the event */
return shouldReportEvent();
}
return false;
}
void BatteryCapacityReporter::reportEvent(const std::shared_ptr<IStats> &stats_client) {
// Load values array
std::vector<VendorAtomValue> values(5);
VendorAtomValue tmp;
tmp.set<VendorAtomValue::intValue>(log_reason_);
values[BatteryCapacityFG::kCapacityLogReasonFieldNumber - kVendorAtomOffset] = tmp;
tmp.set<VendorAtomValue::floatValue>(gdf_);
values[BatteryCapacityFG::kCapacityGdfFieldNumber - kVendorAtomOffset] = tmp;
tmp.set<VendorAtomValue::floatValue>(ssoc_);
values[BatteryCapacityFG::kCapacitySsocFieldNumber - kVendorAtomOffset] = tmp;
tmp.set<VendorAtomValue::floatValue>(gdf_curve_);
values[BatteryCapacityFG::kCapacityGdfCurveFieldNumber - kVendorAtomOffset] = tmp;
tmp.set<VendorAtomValue::floatValue>(ssoc_curve_);
values[BatteryCapacityFG::kCapacitySsocCurveFieldNumber - kVendorAtomOffset] = tmp;
// Send vendor atom to IStats HAL
VendorAtom event = {.reverseDomainName = "",
.atomId = PixelAtoms::Atom::kFgCapacity,
.values = std::move(values)};
const ndk::ScopedAStatus ret = stats_client->reportVendorAtom(event);
if (!ret.isOk())
ALOGE("Unable to report to IStats service");
}
} // namespace pixel
} // namespace google
} // namespace hardware
} // namespace android
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