149 lines
4.4 KiB
C++
149 lines
4.4 KiB
C++
/*
|
|
* Copyright (C) 2018 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.
|
|
*/
|
|
|
|
#include <pixelhealth/CycleCountBackupRestore.h>
|
|
|
|
namespace hardware {
|
|
namespace google {
|
|
namespace pixel {
|
|
namespace health {
|
|
|
|
static constexpr int kBackupTrigger = 20;
|
|
|
|
CycleCountBackupRestore::CycleCountBackupRestore(int nb_buckets, const char *sysfs_path,
|
|
const char *persist_path, const char *serial_path)
|
|
: nb_buckets_(nb_buckets),
|
|
saved_soc_(-1),
|
|
soc_inc_(0),
|
|
sysfs_path_(sysfs_path),
|
|
persist_path_(persist_path),
|
|
serial_path_(serial_path) {
|
|
sw_bins_ = new int[nb_buckets]();
|
|
hw_bins_ = new int[nb_buckets]();
|
|
}
|
|
|
|
void CycleCountBackupRestore::Restore() {
|
|
if (CheckSerial()) {
|
|
Read(persist_path_, sw_bins_);
|
|
}
|
|
Read(sysfs_path_, hw_bins_);
|
|
UpdateAndSave();
|
|
}
|
|
|
|
bool CycleCountBackupRestore::CheckSerial() {
|
|
std::string device_battery_serial;
|
|
std::string persist_battery_serial;
|
|
|
|
if (serial_path_.empty())
|
|
return true;
|
|
|
|
if (!android::base::ReadFileToString(serial_path_, &device_battery_serial)) {
|
|
LOG(ERROR) << "Failed to read " << serial_path_;
|
|
return true;
|
|
}
|
|
|
|
if (!android::base::ReadFileToString(kPersistSerial, &persist_battery_serial)) {
|
|
LOG(ERROR) << "Failed to read " << kPersistSerial;
|
|
}
|
|
|
|
if (device_battery_serial != persist_battery_serial) {
|
|
// Battery pack has been changed or first time,
|
|
// cycle counts on the pack are the ones to save
|
|
if (!android::base::WriteStringToFile(device_battery_serial, kPersistSerial)) {
|
|
LOG(ERROR) << "Write to " << kPersistSerial << " error: " << strerror(errno);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
void CycleCountBackupRestore::Backup(int battery_level) {
|
|
if (saved_soc_ == -1) {
|
|
saved_soc_ = battery_level;
|
|
return;
|
|
}
|
|
// Cycle counts only increases on increasing level
|
|
if (battery_level > saved_soc_) {
|
|
soc_inc_ += battery_level - saved_soc_;
|
|
}
|
|
saved_soc_ = battery_level;
|
|
// To avoid writting file too often just rate limit it
|
|
if (soc_inc_ >= kBackupTrigger) {
|
|
Read(sysfs_path_, hw_bins_);
|
|
UpdateAndSave();
|
|
soc_inc_ = 0;
|
|
}
|
|
}
|
|
|
|
void CycleCountBackupRestore::Read(const std::string &path, int *bins) {
|
|
std::string buffer;
|
|
|
|
if (!android::base::ReadFileToString(path, &buffer)) {
|
|
LOG(ERROR) << "Failed to read " << path;
|
|
return;
|
|
}
|
|
|
|
buffer = ::android::base::Trim(buffer);
|
|
std::vector<std::string> counts = android::base::Split(buffer, " ");
|
|
if (counts.size() != (size_t)nb_buckets_) {
|
|
LOG(ERROR) << "data format \"" << buffer << "\" is wrong in " << path;
|
|
} else {
|
|
LOG(INFO) << "Read: \"" << buffer << "\" from " << path;
|
|
for (int i = 0; i < nb_buckets_; ++i) {
|
|
bins[i] = std::stoi(counts[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void CycleCountBackupRestore::Write(int *bins, const std::string &path) {
|
|
std::string str_data = "";
|
|
|
|
for (int i = 0; i < nb_buckets_; ++i) {
|
|
if (i) {
|
|
str_data += " ";
|
|
}
|
|
str_data += std::to_string(bins[i]);
|
|
}
|
|
|
|
LOG(INFO) << "Write: \"" << str_data << "\" to " << path;
|
|
if (!android::base::WriteStringToFile(str_data, path))
|
|
LOG(ERROR) << "Write to " << path << " error: " << strerror(errno);
|
|
}
|
|
|
|
void CycleCountBackupRestore::UpdateAndSave() {
|
|
bool backup = false;
|
|
bool restore = false;
|
|
for (int i = 0; i < nb_buckets_; i++) {
|
|
if (hw_bins_[i] < sw_bins_[i]) {
|
|
hw_bins_[i] = sw_bins_[i];
|
|
restore = true;
|
|
} else if (hw_bins_[i] > sw_bins_[i]) {
|
|
sw_bins_[i] = hw_bins_[i];
|
|
backup = true;
|
|
}
|
|
}
|
|
if (restore)
|
|
Write(hw_bins_, sysfs_path_);
|
|
if (backup)
|
|
Write(sw_bins_, persist_path_);
|
|
}
|
|
|
|
} // namespace health
|
|
} // namespace pixel
|
|
} // namespace google
|
|
} // namespace hardware
|