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/*
* Copyright (C) 2013 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 "healthd"
#define KLOG_LEVEL 6
#include <healthd/healthd.h>
#include <healthd/BatteryMonitor.h>
#include <errno.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <batteryservice/BatteryService.h>
#include <cutils/klog.h>
#include <cutils/uevent.h>
#include <sys/epoll.h>
#include <sys/timerfd.h>
#include <utils/Errors.h>
using namespace android;
// Periodic chores intervals in seconds
#define DEFAULT_PERIODIC_CHORES_INTERVAL_FAST (60 * 1)
#define DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW (60 * 10)
static struct healthd_config healthd_config = {
.periodic_chores_interval_fast = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST,
.periodic_chores_interval_slow = DEFAULT_PERIODIC_CHORES_INTERVAL_SLOW,
.batteryStatusPath = String8(String8::kEmptyString),
.batteryHealthPath = String8(String8::kEmptyString),
.batteryPresentPath = String8(String8::kEmptyString),
.batteryCapacityPath = String8(String8::kEmptyString),
.batteryVoltagePath = String8(String8::kEmptyString),
.batteryTemperaturePath = String8(String8::kEmptyString),
.batteryTechnologyPath = String8(String8::kEmptyString),
.batteryCurrentNowPath = String8(String8::kEmptyString),
.batteryCurrentAvgPath = String8(String8::kEmptyString),
.batteryChargeCounterPath = String8(String8::kEmptyString),
.batteryFullChargePath = String8(String8::kEmptyString),
.batteryCycleCountPath = String8(String8::kEmptyString),
.energyCounter = NULL,
.boot_min_cap = 0,
.screen_on = NULL,
};
static int eventct;
static int epollfd;
#define POWER_SUPPLY_SUBSYSTEM "power_supply"
// epoll_create() parameter is actually unused
#define MAX_EPOLL_EVENTS 40
static int uevent_fd;
static int wakealarm_fd;
// -1 for no epoll timeout
static int awake_poll_interval = -1;
static int wakealarm_wake_interval = DEFAULT_PERIODIC_CHORES_INTERVAL_FAST;
static BatteryMonitor* gBatteryMonitor;
struct healthd_mode_ops *healthd_mode_ops;
// Android mode
extern void healthd_mode_android_init(struct healthd_config *config);
extern int healthd_mode_android_preparetowait(void);
extern void healthd_mode_android_battery_update(
struct android::BatteryProperties *props);
// Charger mode
extern void healthd_mode_charger_init(struct healthd_config *config);
extern int healthd_mode_charger_preparetowait(void);
extern void healthd_mode_charger_heartbeat(void);
extern void healthd_mode_charger_battery_update(
struct android::BatteryProperties *props);
// NOPs for modes that need no special action
static void healthd_mode_nop_init(struct healthd_config *config);
static int healthd_mode_nop_preparetowait(void);
static void healthd_mode_nop_heartbeat(void);
static void healthd_mode_nop_battery_update(
struct android::BatteryProperties *props);
static struct healthd_mode_ops android_ops = {
.init = healthd_mode_android_init,
.preparetowait = healthd_mode_android_preparetowait,
.heartbeat = healthd_mode_nop_heartbeat,
.battery_update = healthd_mode_android_battery_update,
};
static struct healthd_mode_ops charger_ops = {
#ifdef CHARGER_NO_UI
.init = healthd_mode_nop_init,
.preparetowait = healthd_mode_nop_preparetowait,
.heartbeat = healthd_mode_nop_heartbeat,
.battery_update = healthd_mode_nop_battery_update,
#else
.init = healthd_mode_charger_init,
.preparetowait = healthd_mode_charger_preparetowait,
.heartbeat = healthd_mode_charger_heartbeat,
.battery_update = healthd_mode_charger_battery_update,
#endif
};
static struct healthd_mode_ops recovery_ops = {
.init = healthd_mode_nop_init,
.preparetowait = healthd_mode_nop_preparetowait,
.heartbeat = healthd_mode_nop_heartbeat,
.battery_update = healthd_mode_nop_battery_update,
};
static void healthd_mode_nop_init(struct healthd_config* /*config*/) {
}
static int healthd_mode_nop_preparetowait(void) {
return -1;
}
static void healthd_mode_nop_heartbeat(void) {
}
static void healthd_mode_nop_battery_update(
struct android::BatteryProperties* /*props*/) {
}
int healthd_register_event(int fd, void (*handler)(uint32_t)) {
struct epoll_event ev;
ev.events = EPOLLIN | EPOLLWAKEUP;
ev.data.ptr = (void *)handler;
if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev) == -1) {
KLOG_ERROR(LOG_TAG,
"epoll_ctl failed; errno=%d\n", errno);
return -1;
}
eventct++;
return 0;
}
static void wakealarm_set_interval(int interval) {
struct itimerspec itval;
if (wakealarm_fd == -1)
return;
wakealarm_wake_interval = interval;
if (interval == -1)
interval = 0;
itval.it_interval.tv_sec = interval;
itval.it_interval.tv_nsec = 0;
itval.it_value.tv_sec = interval;
itval.it_value.tv_nsec = 0;
if (timerfd_settime(wakealarm_fd, 0, &itval, NULL) == -1)
KLOG_ERROR(LOG_TAG, "wakealarm_set_interval: timerfd_settime failed\n");
}
status_t healthd_get_property(int id, struct BatteryProperty *val) {
return gBatteryMonitor->getProperty(id, val);
}
void healthd_battery_update(void) {
// Fast wake interval when on charger (watch for overheat);
// slow wake interval when on battery (watch for drained battery).
int new_wake_interval = gBatteryMonitor->update() ?
healthd_config.periodic_chores_interval_fast :
healthd_config.periodic_chores_interval_slow;
if (new_wake_interval != wakealarm_wake_interval)
wakealarm_set_interval(new_wake_interval);
// During awake periods poll at fast rate. If wake alarm is set at fast
// rate then just use the alarm; if wake alarm is set at slow rate then
// poll at fast rate while awake and let alarm wake up at slow rate when
// asleep.
if (healthd_config.periodic_chores_interval_fast == -1)
awake_poll_interval = -1;
else
awake_poll_interval =
new_wake_interval == healthd_config.periodic_chores_interval_fast ?
-1 : healthd_config.periodic_chores_interval_fast * 1000;
}
void healthd_dump_battery_state(int fd) {
gBatteryMonitor->dumpState(fd);
fsync(fd);
}
static void periodic_chores() {
healthd_battery_update();
}
#define UEVENT_MSG_LEN 2048
static void uevent_event(uint32_t /*epevents*/) {
char msg[UEVENT_MSG_LEN+2];
char *cp;
int n;
n = uevent_kernel_multicast_recv(uevent_fd, msg, UEVENT_MSG_LEN);
if (n <= 0)
return;
if (n >= UEVENT_MSG_LEN) /* overflow -- discard */
return;
msg[n] = '\0';
msg[n+1] = '\0';
cp = msg;
while (*cp) {
if (!strcmp(cp, "SUBSYSTEM=" POWER_SUPPLY_SUBSYSTEM)) {
healthd_battery_update();
break;
}
/* advance to after the next \0 */
while (*cp++)
;
}
}
static void uevent_init(void) {
uevent_fd = uevent_open_socket(64*1024, true);
if (uevent_fd < 0) {
KLOG_ERROR(LOG_TAG, "uevent_init: uevent_open_socket failed\n");
return;
}
fcntl(uevent_fd, F_SETFL, O_NONBLOCK);
if (healthd_register_event(uevent_fd, uevent_event))
KLOG_ERROR(LOG_TAG,
"register for uevent events failed\n");
}
static void wakealarm_event(uint32_t /*epevents*/) {
unsigned long long wakeups;
if (read(wakealarm_fd, &wakeups, sizeof(wakeups)) == -1) {
KLOG_ERROR(LOG_TAG, "wakealarm_event: read wakealarm fd failed\n");
return;
}
periodic_chores();
}
static void wakealarm_init(void) {
wakealarm_fd = timerfd_create(CLOCK_BOOTTIME_ALARM, TFD_NONBLOCK);
if (wakealarm_fd == -1) {
KLOG_ERROR(LOG_TAG, "wakealarm_init: timerfd_create failed\n");
return;
}
if (healthd_register_event(wakealarm_fd, wakealarm_event))
KLOG_ERROR(LOG_TAG,
"Registration of wakealarm event failed\n");
wakealarm_set_interval(healthd_config.periodic_chores_interval_fast);
}
static void healthd_mainloop(void) {
while (1) {
struct epoll_event events[eventct];
int nevents;
int timeout = awake_poll_interval;
int mode_timeout;
mode_timeout = healthd_mode_ops->preparetowait();
if (timeout < 0 || (mode_timeout > 0 && mode_timeout < timeout))
timeout = mode_timeout;
nevents = epoll_wait(epollfd, events, eventct, timeout);
if (nevents == -1) {
if (errno == EINTR)
continue;
KLOG_ERROR(LOG_TAG, "healthd_mainloop: epoll_wait failed\n");
break;
}
for (int n = 0; n < nevents; ++n) {
if (events[n].data.ptr)
(*(void (*)(int))events[n].data.ptr)(events[n].events);
}
if (!nevents)
periodic_chores();
healthd_mode_ops->heartbeat();
}
return;
}
static int healthd_init() {
epollfd = epoll_create(MAX_EPOLL_EVENTS);
if (epollfd == -1) {
KLOG_ERROR(LOG_TAG,
"epoll_create failed; errno=%d\n",
errno);
return -1;
}
healthd_board_init(&healthd_config);
healthd_mode_ops->init(&healthd_config);
wakealarm_init();
uevent_init();
gBatteryMonitor = new BatteryMonitor();
gBatteryMonitor->init(&healthd_config);
return 0;
}
int main(int argc, char **argv) {
int ch;
int ret;
klog_set_level(KLOG_LEVEL);
healthd_mode_ops = &android_ops;
if (!strcmp(basename(argv[0]), "charger")) {
healthd_mode_ops = &charger_ops;
} else {
while ((ch = getopt(argc, argv, "cr")) != -1) {
switch (ch) {
case 'c':
healthd_mode_ops = &charger_ops;
break;
case 'r':
healthd_mode_ops = &recovery_ops;
break;
case '?':
default:
KLOG_ERROR(LOG_TAG, "Unrecognized healthd option: %c\n",
optopt);
exit(1);
}
}
}
ret = healthd_init();
if (ret) {
KLOG_ERROR("Initialization failed, exiting\n");
exit(2);
}
healthd_mainloop();
KLOG_ERROR("Main loop terminated, exiting\n");
return 3;
}