1 /*
2 * Copyright (C) 2020 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 "pixelstats-uevent: BatteryCapacityFG"
18
19 #include <log/log.h>
20 #include <time.h>
21 #include <utils/Timers.h>
22 #include <cmath>
23
24 #include <android-base/file.h>
25
26 #include <android/frameworks/stats/1.0/IStats.h>
27 #include <pixelstats/BatteryCapacityReporter.h>
28
29 #include <hardware/google/pixel/pixelstats/pixelatoms.pb.h>
30
31 namespace android {
32 namespace hardware {
33 namespace google {
34 namespace pixel {
35
36 using android::base::ReadFileToString;
37 using android::frameworks::stats::V1_0::IStats;
38 using android::frameworks::stats::V1_0::VendorAtom;
39 using android::hardware::google::pixel::PixelAtoms::BatteryCapacityFG;
40
41 #define ONE_HOUR_SECS (60 * 60)
42
BatteryCapacityReporter()43 BatteryCapacityReporter::BatteryCapacityReporter() {
44 // Remove the need for a translation function/table, while removing the dependency on the
45 // generated <pixelatoms.pb.h> in BatteryCapacityReporter.h.
46 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_UNKNOWN) ==
47 static_cast<int>(BatteryCapacityFG::LOG_REASON_UNKNOWN));
48 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_CONNECTED) ==
49 static_cast<int>(BatteryCapacityFG::LOG_REASON_CONNECTED));
50 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_DISCONNECTED) ==
51 static_cast<int>(BatteryCapacityFG::LOG_REASON_DISCONNECTED));
52 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_FULL_CHARGE) ==
53 static_cast<int>(BatteryCapacityFG::LOG_REASON_FULL_CHARGE));
54 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_PERCENT_SKIP) ==
55 static_cast<int>(BatteryCapacityFG::LOG_REASON_PERCENT_SKIP));
56 static_assert(static_cast<int>(BatteryCapacityReporter::LOG_REASON_DIVERGING_FG) ==
57 static_cast<int>(BatteryCapacityFG::LOG_REASON_DIVERGING_FG));
58 }
59
checkAndReport(const std::string & path)60 void BatteryCapacityReporter::checkAndReport(const std::string &path) {
61 if (parse(path)) {
62 if (checkLogEvent()) {
63 reportEvent();
64 }
65 }
66 }
67
getTimeSecs(void)68 int64_t BatteryCapacityReporter::getTimeSecs(void) {
69 return nanoseconds_to_seconds(systemTime(SYSTEM_TIME_BOOTTIME));
70 }
71
parse(const std::string & path)72 bool BatteryCapacityReporter::parse(const std::string &path) {
73 std::string batterySSOCContents;
74 if (!ReadFileToString(path, &batterySSOCContents)) {
75 ALOGE("Unable to read ssoc_details path: %s - %s", path.c_str(), strerror(errno));
76 return false;
77 }
78
79 // Parse file. Example format:
80 // soc: l=97% gdf=97.72 uic=97.72 rl=97.72
81 // curve:[15.00 15.00][97.87 97.87][100.00 100.00]
82 // status: ct=1 rl=0 s=1
83 if (sscanf(batterySSOCContents.c_str(),
84 "soc: %*s gdf=%f %*s rl=%f\n"
85 "curve:[%*f %*f][%f %f][%*f %*f]\n"
86 "status: %*s %*s s=%d",
87 &gdf_, &ssoc_, &gdf_curve_, &ssoc_curve_, &status_) != 5) {
88 ALOGE("Unable to parse ssoc_details [%s] from file %s to int.", batterySSOCContents.c_str(),
89 path.c_str());
90 return false;
91 }
92
93 return true;
94 }
95
shouldReportEvent(void)96 bool BatteryCapacityReporter::shouldReportEvent(void) {
97 const int64_t current_time = getTimeSecs();
98 if (current_time == 0) {
99 ALOGE("Current boot time is zero!");
100 return false;
101 }
102
103 /* Perform cleanup of events that are older than 1 hour */
104 for (int i = 0; i < MAX_LOG_EVENTS_PER_HOUR; i++) {
105 if (log_event_time_secs_[i] != 0 && /* Non-empty */
106 log_event_time_secs_[i] + ONE_HOUR_SECS < current_time) {
107 log_event_time_secs_[i] = 0;
108 num_events_in_last_hour_--;
109 }
110 }
111
112 /* Log event if there hasn't been many events in the past hour */
113 if (num_events_in_last_hour_ < MAX_LOG_EVENTS_PER_HOUR) {
114 for (int i = 0; i < MAX_LOG_EVENTS_PER_HOUR; i++) {
115 if (log_event_time_secs_[i] == 0) { /* Empty */
116 log_event_time_secs_[i] = current_time;
117 num_events_in_last_hour_++;
118 return true;
119 }
120 }
121 } else {
122 ALOGD("Too many log events in past hour; event ignored.");
123 }
124
125 return false;
126 }
127
128 /**
129 * @return true if a log should be reported, else false
130 */
checkLogEvent(void)131 bool BatteryCapacityReporter::checkLogEvent(void) {
132 LogReason log_reason = LOG_REASON_UNKNOWN;
133 if (status_previous_ != status_) {
134 // Handle nominal events
135
136 if (status_ == SOC_STATUS_CONNECTED) {
137 log_reason = LOG_REASON_CONNECTED;
138
139 } else if (status_ == SOC_STATUS_DISCONNECTED) {
140 log_reason = LOG_REASON_DISCONNECTED;
141
142 } else if (status_ == SOC_STATUS_FULL) {
143 log_reason = LOG_REASON_FULL_CHARGE;
144 }
145
146 status_previous_ = status_;
147
148 } else {
149 // Handle abnormal events
150 const float diff = fabsf(ssoc_ - gdf_);
151
152 if (fabsf(ssoc_ - ssoc_previous_) >= 2.0f) {
153 log_reason = LOG_REASON_PERCENT_SKIP;
154
155 // Every +- 1% when above a 4% SOC difference (w/ timer)
156 } else if (static_cast<int>(round(ssoc_gdf_diff_previous_)) !=
157 static_cast<int>(round(diff)) &&
158 diff >= 4.0f) {
159 log_reason = LOG_REASON_DIVERGING_FG;
160
161 ssoc_gdf_diff_previous_ = diff;
162 }
163 }
164 ssoc_previous_ = ssoc_;
165 log_reason_ = log_reason;
166
167 if (log_reason != LOG_REASON_UNKNOWN) {
168 /* Found new log event! */
169 /* Check if we should actually report the event */
170 return shouldReportEvent();
171 }
172
173 return false;
174 }
175
reportEvent(void)176 void BatteryCapacityReporter::reportEvent(void) {
177 sp<IStats> stats_client = IStats::tryGetService();
178 if (!stats_client) {
179 ALOGD("Couldn't connect to IStats service");
180 return;
181 }
182
183 // Load values array
184 std::vector<VendorAtom::Value> values(5);
185 VendorAtom::Value tmp;
186 tmp.intValue(log_reason_);
187 values[BatteryCapacityFG::kCapacityLogReasonFieldNumber - kVendorAtomOffset] = tmp;
188 tmp.floatValue(gdf_);
189 values[BatteryCapacityFG::kCapacityGdfFieldNumber - kVendorAtomOffset] = tmp;
190 tmp.floatValue(ssoc_);
191 values[BatteryCapacityFG::kCapacitySsocFieldNumber - kVendorAtomOffset] = tmp;
192 tmp.floatValue(gdf_curve_);
193 values[BatteryCapacityFG::kCapacityGdfCurveFieldNumber - kVendorAtomOffset] = tmp;
194 tmp.floatValue(ssoc_curve_);
195 values[BatteryCapacityFG::kCapacitySsocCurveFieldNumber - kVendorAtomOffset] = tmp;
196
197 // Send vendor atom to IStats HAL
198 VendorAtom event = {.reverseDomainName = PixelAtoms::ReverseDomainNames().pixel(),
199 .atomId = PixelAtoms::Ids::FG_CAPACITY,
200 .values = values};
201 Return<void> ret = stats_client->reportVendorAtom(event);
202 if (!ret.isOk())
203 ALOGE("Unable to report to IStats service");
204 }
205
206 } // namespace pixel
207 } // namespace google
208 } // namespace hardware
209 } // namespace android
210