| /* |
| * 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 "LearnedCapacityBackupRestore.h" |
| |
| namespace device { |
| namespace google { |
| namespace bonito { |
| namespace health { |
| |
| static constexpr char kChgFullDesignFile[] = "sys/class/power_supply/bms/charge_full_design"; |
| static constexpr char kChgFullFile[] = "sys/class/power_supply/bms/charge_full"; |
| static constexpr char kSysCFPersistFile[] = "/mnt/vendor/persist/battery/qcom_charge_full"; |
| static constexpr int kBuffSize = 256; |
| |
| LearnedCapacityBackupRestore::LearnedCapacityBackupRestore() {} |
| |
| void LearnedCapacityBackupRestore::Restore() { |
| ReadPersistData(); |
| ReadNominalCapacity(); |
| ReadCapacity(); |
| UpdateAndSave(); |
| } |
| |
| void LearnedCapacityBackupRestore::Backup() { |
| ReadCapacity(); |
| UpdateAndSave(); |
| } |
| |
| void LearnedCapacityBackupRestore::ReadPersistData() { |
| std::string buffer; |
| |
| if (!android::base::ReadFileToString(std::string(kSysCFPersistFile), &buffer)) { |
| LOG(ERROR) << "Cannot read the storage file"; |
| return; |
| } |
| |
| if (sscanf(buffer.c_str(), "%d", &sw_cap_) < 1) |
| LOG(ERROR) << "data format is wrong in the storage file: " << buffer; |
| else |
| LOG(INFO) << "Storage data: " << buffer; |
| } |
| |
| void LearnedCapacityBackupRestore::SaveToStorage() { |
| char strData[kBuffSize]; |
| |
| snprintf(strData, kBuffSize, "%d", sw_cap_); |
| |
| LOG(INFO) << "Save to Storage: " << strData; |
| |
| if (!android::base::WriteStringToFile(strData, std::string(kSysCFPersistFile))) |
| LOG(ERROR) << "Write file error: " << strerror(errno); |
| } |
| |
| void LearnedCapacityBackupRestore::ReadNominalCapacity() { |
| std::string buffer; |
| |
| if (!android::base::ReadFileToString(std::string(kChgFullDesignFile), &buffer)) { |
| LOG(ERROR) << "Read nominal capacity error: " << strerror(errno); |
| return; |
| } |
| |
| buffer = android::base::Trim(buffer); |
| |
| if (sscanf(buffer.c_str(), "%d", &nom_cap_) < 1) |
| LOG(ERROR) << "Failed to parse nominal capacity: " << buffer; |
| else |
| LOG(INFO) << "nominal capacity: " << buffer; |
| } |
| |
| void LearnedCapacityBackupRestore::ReadCapacity() { |
| std::string buffer; |
| |
| if (!android::base::ReadFileToString(std::string(kChgFullFile), &buffer)) { |
| LOG(ERROR) << "Read capacity error: " << strerror(errno); |
| return; |
| } |
| |
| buffer = android::base::Trim(buffer); |
| |
| if (sscanf(buffer.c_str(), "%d", &hw_cap_) < 1) |
| LOG(ERROR) << "Failed to parse capacity: " << buffer; |
| else |
| LOG(INFO) << "capacity: " << buffer; |
| } |
| |
| void LearnedCapacityBackupRestore::SaveToSRAM() { |
| char strData[kBuffSize]; |
| |
| snprintf(strData, kBuffSize, "%d", hw_cap_); |
| |
| LOG(INFO) << "Save to SRAM: " << strData; |
| |
| if (!android::base::WriteStringToFile(strData, std::string(kChgFullFile))) |
| LOG(ERROR) << "Write data error: " << strerror(errno); |
| } |
| |
| void LearnedCapacityBackupRestore::UpdateAndSave() { |
| bool backup = false; |
| bool restore = false; |
| if (hw_cap_) { |
| if (((hw_cap_ != sw_cap_) && (hw_cap_ != nom_cap_)) || |
| (sw_cap_ == 0)) { |
| sw_cap_ = hw_cap_; |
| backup = true; |
| } else if ((sw_cap_ > 0) && (hw_cap_ == nom_cap_)) { |
| hw_cap_ = sw_cap_; |
| restore = true; |
| } |
| } |
| if (restore) |
| SaveToSRAM(); |
| if (backup) |
| SaveToStorage(); |
| } |
| |
| } // namespace health |
| } // namespace bonito |
| } // namespace google |
| } // namespace device |