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 #define KLOG_LEVEL 6
19
20 #include <healthd/healthd.h>
21 #include <healthd/BatteryMonitor.h>
22
23 #include <errno.h>
24 #include <libgen.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29 #include <batteryservice/BatteryService.h>
30 #include <cutils/klog.h>
31 #include <cutils/uevent.h>
32 #include <sys/epoll.h>
33 #include <sys/timerfd.h>
34 #include <utils/Errors.h>
35
36 using namespace android;
37
38 #ifndef BOARD_PERIODIC_CHORES_INTERVAL_FAST
39 // Periodic chores fast interval in seconds
40 #define DEFAULT_PERIODIC_CHORES_INTERVAL_FAST (60 * 1)
41 #else
42 #define DEFAULT_PERIODIC_CHORES_INTERVAL_FAST (BOARD_PERIODIC_CHORES_INTERVAL_FAST)
43 #endif
44
45 #ifndef BOARD_PERIODIC_CHORES_INTERVAL_SLOW
46 // Periodic chores fast interval in seconds
47 #define DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW (60 * 10)
48 #else
49 #define DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW (BOARD_PERIODIC_CHORES_INTERVAL_SLOW)
50 #endif
51
52 static struct healthd_config healthd_config = {
53 .periodic_chores_interval_fast = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST,
54 .periodic_chores_interval_slow = DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW,
55 .batteryStatusPath = String8(String8::kEmptyString),
56 .batteryHealthPath = String8(String8::kEmptyString),
57 .batteryPresentPath = String8(String8::kEmptyString),
58 .batteryCapacityPath = String8(String8::kEmptyString),
59 .batteryVoltagePath = String8(String8::kEmptyString),
60 .batteryTemperaturePath = String8(String8::kEmptyString),
61 .batteryTechnologyPath = String8(String8::kEmptyString),
62 .batteryCurrentNowPath = String8(String8::kEmptyString),
63 .batteryCurrentAvgPath = String8(String8::kEmptyString),
64 .batteryChargeCounterPath = String8(String8::kEmptyString),
65 .batteryFullChargePath = String8(String8::kEmptyString),
66 .batteryCycleCountPath = String8(String8::kEmptyString),
67 .energyCounter = NULL,
68 .boot_min_cap = 0,
69 .screen_on = NULL,
70 };
71
72 static int eventct;
73 static int epollfd;
74
75 #define POWER_SUPPLY_SUBSYSTEM "power_supply"
76
77 // epoll_create() parameter is actually unused
78 #define MAX_EPOLL_EVENTS 40
79 static int uevent_fd;
80 static int wakealarm_fd;
81
82 // -1 for no epoll timeout
83 static int awake_poll_interval = -1;
84
85 static int wakealarm_wake_interval = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST;
86
87 static BatteryMonitor* gBatteryMonitor;
88
89 struct healthd_mode_ops *healthd_mode_ops;
90
91 // Android mode
92
93 extern void healthd_mode_android_init(struct healthd_config *config);
94 extern int healthd_mode_android_preparetowait(void);
95 extern void healthd_mode_android_battery_update(
96 struct android::BatteryProperties *props);
97
98 // Charger mode
99
100 extern void healthd_mode_charger_init(struct healthd_config *config);
101 extern int healthd_mode_charger_preparetowait(void);
102 extern void healthd_mode_charger_heartbeat(void);
103 extern void healthd_mode_charger_battery_update(
104 struct android::BatteryProperties *props);
105
106 // NOPs for modes that need no special action
107
108 static void healthd_mode_nop_init(struct healthd_config *config);
109 static int healthd_mode_nop_preparetowait(void);
110 static void healthd_mode_nop_heartbeat(void);
111 static void healthd_mode_nop_battery_update(
112 struct android::BatteryProperties *props);
113
114 static struct healthd_mode_ops android_ops = {
115 .init = healthd_mode_android_init,
116 .preparetowait = healthd_mode_android_preparetowait,
117 .heartbeat = healthd_mode_nop_heartbeat,
118 .battery_update = healthd_mode_android_battery_update,
119 };
120
121 static struct healthd_mode_ops charger_ops = {
122 .init = healthd_mode_charger_init,
123 .preparetowait = healthd_mode_charger_preparetowait,
124 .heartbeat = healthd_mode_charger_heartbeat,
125 .battery_update = healthd_mode_charger_battery_update,
126 };
127
128 static struct healthd_mode_ops recovery_ops = {
129 .init = healthd_mode_nop_init,
130 .preparetowait = healthd_mode_nop_preparetowait,
131 .heartbeat = healthd_mode_nop_heartbeat,
132 .battery_update = healthd_mode_nop_battery_update,
133 };
134
healthd_mode_nop_init(struct healthd_config *)135 static void healthd_mode_nop_init(struct healthd_config* /*config*/) {
136 }
137
healthd_mode_nop_preparetowait(void)138 static int healthd_mode_nop_preparetowait(void) {
139 return -1;
140 }
141
healthd_mode_nop_heartbeat(void)142 static void healthd_mode_nop_heartbeat(void) {
143 }
144
healthd_mode_nop_battery_update(struct android::BatteryProperties *)145 static void healthd_mode_nop_battery_update(
146 struct android::BatteryProperties* /*props*/) {
147 }
148
healthd_register_event(int fd,void (* handler)(uint32_t),EventWakeup wakeup)149 int healthd_register_event(int fd, void (*handler)(uint32_t), EventWakeup wakeup) {
150 struct epoll_event ev;
151
152 ev.events = EPOLLIN;
153
154 if (wakeup == EVENT_WAKEUP_FD)
155 ev.events |= EPOLLWAKEUP;
156
157 ev.data.ptr = (void *)handler;
158 if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
159 KLOG_ERROR(LOG_TAG,
160 "epoll_ctl failed; errno=%d\n", errno);
161 return -1;
162 }
163
164 eventct++;
165 return 0;
166 }
167
wakealarm_set_interval(int interval)168 static void wakealarm_set_interval(int interval) {
169 struct itimerspec itval;
170
171 if (wakealarm_fd == -1)
172 return;
173
174 wakealarm_wake_interval = interval;
175
176 if (interval == -1)
177 interval = 0;
178
179 itval.it_interval.tv_sec = interval;
180 itval.it_interval.tv_nsec = 0;
181 itval.it_value.tv_sec = interval;
182 itval.it_value.tv_nsec = 0;
183
184 if (timerfd_settime(wakealarm_fd, 0, &itval, NULL) == -1)
185 KLOG_ERROR(LOG_TAG, "wakealarm_set_interval: timerfd_settime failed\n");
186 }
187
healthd_get_property(int id,struct BatteryProperty * val)188 status_t healthd_get_property(int id, struct BatteryProperty *val) {
189 return gBatteryMonitor->getProperty(id, val);
190 }
191
healthd_battery_update(void)192 void healthd_battery_update(void) {
193 // Fast wake interval when on charger (watch for overheat);
194 // slow wake interval when on battery (watch for drained battery).
195
196 int new_wake_interval = gBatteryMonitor->update() ?
197 healthd_config.periodic_chores_interval_fast :
198 healthd_config.periodic_chores_interval_slow;
199
200 if (new_wake_interval != wakealarm_wake_interval)
201 wakealarm_set_interval(new_wake_interval);
202
203 // During awake periods poll at fast rate. If wake alarm is set at fast
204 // rate then just use the alarm; if wake alarm is set at slow rate then
205 // poll at fast rate while awake and let alarm wake up at slow rate when
206 // asleep.
207
208 if (healthd_config.periodic_chores_interval_fast == -1)
209 awake_poll_interval = -1;
210 else
211 awake_poll_interval =
212 new_wake_interval == healthd_config.periodic_chores_interval_fast ?
213 -1 : healthd_config.periodic_chores_interval_fast * 1000;
214 }
215
healthd_dump_battery_state(int fd)216 void healthd_dump_battery_state(int fd) {
217 gBatteryMonitor->dumpState(fd);
218 fsync(fd);
219 }
220
periodic_chores()221 static void periodic_chores() {
222 healthd_battery_update();
223 }
224
225 #define UEVENT_MSG_LEN 2048
uevent_event(uint32_t)226 static void uevent_event(uint32_t /*epevents*/) {
227 char msg[UEVENT_MSG_LEN+2];
228 char *cp;
229 int n;
230
231 n = uevent_kernel_multicast_recv(uevent_fd, msg, UEVENT_MSG_LEN);
232 if (n <= 0)
233 return;
234 if (n >= UEVENT_MSG_LEN) /* overflow -- discard */
235 return;
236
237 msg[n] = '\0';
238 msg[n+1] = '\0';
239 cp = msg;
240
241 while (*cp) {
242 if (!strcmp(cp, "SUBSYSTEM=" POWER_SUPPLY_SUBSYSTEM)) {
243 healthd_battery_update();
244 break;
245 }
246
247 /* advance to after the next \0 */
248 while (*cp++)
249 ;
250 }
251 }
252
uevent_init(void)253 static void uevent_init(void) {
254 uevent_fd = uevent_open_socket(64*1024, true);
255
256 if (uevent_fd < 0) {
257 KLOG_ERROR(LOG_TAG, "uevent_init: uevent_open_socket failed\n");
258 return;
259 }
260
261 fcntl(uevent_fd, F_SETFL, O_NONBLOCK);
262 if (healthd_register_event(uevent_fd, uevent_event, EVENT_WAKEUP_FD))
263 KLOG_ERROR(LOG_TAG,
264 "register for uevent events failed\n");
265 }
266
wakealarm_event(uint32_t)267 static void wakealarm_event(uint32_t /*epevents*/) {
268 unsigned long long wakeups;
269
270 if (read(wakealarm_fd, &wakeups, sizeof(wakeups)) == -1) {
271 KLOG_ERROR(LOG_TAG, "wakealarm_event: read wakealarm fd failed\n");
272 return;
273 }
274
275 periodic_chores();
276 }
277
wakealarm_init(void)278 static void wakealarm_init(void) {
279 wakealarm_fd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK);
280 if (wakealarm_fd == -1) {
281 KLOG_ERROR(LOG_TAG, "wakealarm_init: timerfd_create failed\n");
282 return;
283 }
284
285 if (healthd_register_event(wakealarm_fd, wakealarm_event, EVENT_WAKEUP_FD))
286 KLOG_ERROR(LOG_TAG,
287 "Registration of wakealarm event failed\n");
288
289 wakealarm_set_interval(healthd_config.periodic_chores_interval_fast);
290 }
291
healthd_mainloop(void)292 static void healthd_mainloop(void) {
293 int nevents = 0;
294 while (1) {
295 struct epoll_event events[eventct];
296 int timeout = awake_poll_interval;
297 int mode_timeout;
298
299 /* Don't wait for first timer timeout to run periodic chores */
300 if (!nevents)
301 periodic_chores();
302
303 healthd_mode_ops->heartbeat();
304
305 mode_timeout = healthd_mode_ops->preparetowait();
306 if (timeout < 0 || (mode_timeout > 0 && mode_timeout < timeout))
307 timeout = mode_timeout;
308 nevents = epoll_wait(epollfd, events, eventct, timeout);
309 if (nevents == -1) {
310 if (errno == EINTR)
311 continue;
312 KLOG_ERROR(LOG_TAG, "healthd_mainloop: epoll_wait failed\n");
313 break;
314 }
315
316 for (int n = 0; n < nevents; ++n) {
317 if (events[n].data.ptr)
318 (*(void (*)(int))events[n].data.ptr)(events[n].events);
319 }
320 }
321
322 return;
323 }
324
healthd_init()325 static int healthd_init() {
326 epollfd = epoll_create(MAX_EPOLL_EVENTS);
327 if (epollfd == -1) {
328 KLOG_ERROR(LOG_TAG,
329 "epoll_create failed; errno=%d\n",
330 errno);
331 return -1;
332 }
333
334 healthd_board_init(&healthd_config);
335 healthd_mode_ops->init(&healthd_config);
336 wakealarm_init();
337 uevent_init();
338 gBatteryMonitor = new BatteryMonitor();
339 gBatteryMonitor->init(&healthd_config);
340 return 0;
341 }
342
main(int argc,char ** argv)343 int main(int argc, char **argv) {
344 int ch;
345 int ret;
346
347 klog_set_level(KLOG_LEVEL);
348 healthd_mode_ops = &android_ops;
349
350 if (!strcmp(basename(argv[0]), "charger")) {
351 healthd_mode_ops = &charger_ops;
352 } else {
353 while ((ch = getopt(argc, argv, "cr")) != -1) {
354 switch (ch) {
355 case 'c':
356 healthd_mode_ops = &charger_ops;
357 break;
358 case 'r':
359 healthd_mode_ops = &recovery_ops;
360 break;
361 case '?':
362 default:
363 KLOG_ERROR(LOG_TAG, "Unrecognized healthd option: %c\n",
364 optopt);
365 exit(1);
366 }
367 }
368 }
369
370 ret = healthd_init();
371 if (ret) {
372 KLOG_ERROR("Initialization failed, exiting\n");
373 exit(2);
374 }
375
376 healthd_mainloop();
377 KLOG_ERROR("Main loop terminated, exiting\n");
378 return 3;
379 }
380