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platform_system_core
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platform_system_core/toolbox/powerd.c

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#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <sys/select.h>
#include <sys/inotify.h>
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
//#include <linux/input.h> // this does not compile
// from <linux/input.h>
struct input_event {
struct timeval time;
__u16 type;
__u16 code;
__s32 value;
};
#define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */
#define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */
#define EVIOCGKEYCODE _IOR('E', 0x04, int[2]) /* get keycode */
#define EVIOCSKEYCODE _IOW('E', 0x04, int[2]) /* set keycode */
#define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */
#define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */
#define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */
#define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global keystate */
#define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */
#define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */
#define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */
#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + ev, len) /* get event bits */
#define EVIOCGABS(abs) _IOR('E', 0x40 + abs, struct input_absinfo) /* get abs value/limits */
#define EVIOCSABS(abs) _IOW('E', 0xc0 + abs, struct input_absinfo) /* set abs value/limits */
#define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */
#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */
/*
* Event types
*/
#define EV_SYN 0x00
#define EV_KEY 0x01
#define EV_REL 0x02
#define EV_ABS 0x03
#define EV_MSC 0x04
#define EV_SW 0x05
#define EV_LED 0x11
#define EV_SND 0x12
#define EV_REP 0x14
#define EV_FF 0x15
#define EV_PWR 0x16
#define EV_FF_STATUS 0x17
#define EV_MAX 0x1f
#define KEY_POWER 116
#define KEY_SLEEP 142
#define SW_0 0x00
// end <linux/input.h>
struct notify_entry {
int id;
int (*handler)(struct notify_entry *entry, struct inotify_event *event);
const char *filename;
};
int charging_state_notify_handler(struct notify_entry *entry, struct inotify_event *event)
{
static int state = -1;
int last_state;
char buf[40];
int read_len;
int fd;
last_state = state;
fd = open(entry->filename, O_RDONLY);
read_len = read(fd, buf, sizeof(buf));
if(read_len > 0) {
//printf("charging_state_notify_handler: \"%s\"\n", buf);
state = !(strncmp(buf, "Unknown", 7) == 0
|| strncmp(buf, "Discharging", 11) == 0);
}
close(fd);
//printf("charging_state_notify_handler: %d -> %d\n", last_state, state);
return state > last_state;
}
struct notify_entry watched_files[] = {
{
.filename = "/sys/android_power/charging_state",
.handler = charging_state_notify_handler
}
};
int call_notify_handler(struct inotify_event *event)
{
unsigned int start, i;
start = event->wd - watched_files[0].id;
if(start >= ARRAY_SIZE(watched_files))
start = 0;
//printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");
for(i = start; i < ARRAY_SIZE(watched_files); i++) {
if(event->wd == watched_files[i].id) {
if(watched_files[i].handler) {
return watched_files[i].handler(&watched_files[i], event);
}
return 1;
}
}
for(i = 0; i < start; i++) {
if(event->wd == watched_files[i].id) {
if(watched_files[i].handler) {
return watched_files[i].handler(&watched_files[i], event);
}
return 1;
}
}
return 0;
}
int handle_inotify_event(int nfd)
{
int res;
int wake_up = 0;
struct inotify_event *event;
char event_buf[512];
int event_pos = 0;
res = read(nfd, event_buf, sizeof(event_buf));
if(res < (int)sizeof(*event)) {
if(errno == EINTR)
return 0;
fprintf(stderr, "could not get event, %s\n", strerror(errno));
return 0;
}
printf("got %d bytes of event information\n", res);
while(res >= (int)sizeof(*event)) {
int event_size;
event = (struct inotify_event *)(event_buf + event_pos);
wake_up |= call_notify_handler(event);
event_size = sizeof(*event) + event->len;
res -= event_size;
event_pos += event_size;
}
return wake_up;
}
int powerd_main(int argc, char *argv[])
{
int c;
unsigned int i;
int res;
struct timeval tv;
int eventfd;
int notifyfd;
int powerfd;
int powerfd_is_sleep;
int user_activity_fd;
int acquire_partial_wake_lock_fd;
int acquire_full_wake_lock_fd;
int release_wake_lock_fd;
char *eventdev = "/dev/input/event0";
const char *android_sleepdev = "/sys/android_power/request_sleep";
const char *android_autooff_dev = "/sys/android_power/auto_off_timeout";
const char *android_user_activity_dev = "/sys/android_power/last_user_activity";
const char *android_acquire_partial_wake_lock_dev = "/sys/android_power/acquire_partial_wake_lock";
const char *android_acquire_full_wake_lock_dev = "/sys/android_power/acquire_full_wake_lock";
const char *android_release_wake_lock_dev = "/sys/android_power/release_wake_lock";
const char *powerdev = "/sys/power/state";
const char suspendstring[] = "standby";
const char wakelockstring[] = "powerd";
fd_set rfds;
struct input_event event;
struct input_event light_event;
struct input_event light_event2;
int gotkey = 1;
time_t idle_time = 5;
const char *idle_time_string = "5";
time_t lcd_light_time = 0;
time_t key_light_time = 0;
int verbose = 1;
int event_sleep = 0;
int got_power_key_down = 0;
struct timeval power_key_down_time = { 0, 0 };
light_event.type = EV_LED;
light_event.code = 4; // bright lcd backlight
light_event.value = 0; // light off -- sleep after timeout
light_event2.type = EV_LED;
light_event2.code = 8; // keyboard backlight
light_event2.value = 0; // light off -- sleep after timeout
do {
c = getopt(argc, argv, "e:ni:vql:k:");
if (c == EOF)
break;
switch (c) {
case 'e':
eventdev = optarg;
break;
case 'n':
gotkey = 0;
break;
case 'i':
idle_time = atoi(optarg);
idle_time_string = optarg;
break;
case 'v':
verbose = 2;
break;
case 'q':
verbose = 0;
break;
case 'l':
lcd_light_time = atoi(optarg);
break;
case 'k':
key_light_time = atoi(optarg);
break;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
argv[0], optopt);
exit(1);
}
} while (1);
if(optind != argc) {
fprintf(stderr,"%s [-e eventdev]\n", argv[0]);
return 1;
}
eventfd = open(eventdev, O_RDWR | O_NONBLOCK);
if(eventfd < 0) {
fprintf(stderr, "could not open %s, %s\n", eventdev, strerror(errno));
return 1;
}
if(key_light_time >= lcd_light_time) {
lcd_light_time = key_light_time + 1;
fprintf(stderr,"lcd bright backlight time must be longer than keyboard backlight time.\n"
"Setting lcd bright backlight time to %ld seconds\n", lcd_light_time);
}
user_activity_fd = open(android_user_activity_dev, O_RDWR);
if(user_activity_fd >= 0) {
int auto_off_fd = open(android_autooff_dev, O_RDWR);
write(auto_off_fd, idle_time_string, strlen(idle_time_string));
close(auto_off_fd);
}
powerfd = open(android_sleepdev, O_RDWR);
if(powerfd >= 0) {
powerfd_is_sleep = 1;
if(verbose > 0)
printf("Using android sleep dev: %s\n", android_sleepdev);
}
else {
powerfd_is_sleep = 0;
powerfd = open(powerdev, O_RDWR);
if(powerfd >= 0) {
if(verbose > 0)
printf("Using linux power dev: %s\n", powerdev);
}
}
if(powerfd < 0) {
fprintf(stderr, "could not open %s, %s\n", powerdev, strerror(errno));
return 1;
}
notifyfd = inotify_init();
if(notifyfd < 0) {
fprintf(stderr, "inotify_init failed, %s\n", strerror(errno));
return 1;
}
fcntl(notifyfd, F_SETFL, O_NONBLOCK | fcntl(notifyfd, F_GETFL));
for(i = 0; i < ARRAY_SIZE(watched_files); i++) {
watched_files[i].id = inotify_add_watch(notifyfd, watched_files[i].filename, IN_MODIFY);
printf("Watching %s, id %d\n", watched_files[i].filename, watched_files[i].id);
}
acquire_partial_wake_lock_fd = open(android_acquire_partial_wake_lock_dev, O_RDWR);
acquire_full_wake_lock_fd = open(android_acquire_full_wake_lock_dev, O_RDWR);
release_wake_lock_fd = open(android_release_wake_lock_dev, O_RDWR);
if(user_activity_fd >= 0) {
idle_time = 60*60*24; // driver handles real timeout
}
if(gotkey) {
tv.tv_sec = idle_time;
tv.tv_usec = 0;
}
else {
tv.tv_sec = 0;
tv.tv_usec = 500000;
}
while(1) {
FD_ZERO(&rfds);
//FD_SET(0, &rfds);
FD_SET(eventfd, &rfds);
FD_SET(notifyfd, &rfds);
res = select(((notifyfd > eventfd) ? notifyfd : eventfd) + 1, &rfds, NULL, NULL, &tv);
if(res < 0) {
fprintf(stderr, "select failed, %s\n", strerror(errno));
return 1;
}
if(res == 0) {
if(light_event2.value == 1)
goto light2_off;
if(light_event.value == 1)
goto light_off;
if(user_activity_fd < 0) {
if(gotkey && verbose > 0)
printf("Idle - sleep\n");
if(!gotkey && verbose > 1)
printf("Reenter sleep\n");
goto sleep;
}
else {
tv.tv_sec = 60*60*24;
tv.tv_usec = 0;
}
}
if(res > 0) {
//if(FD_ISSET(0, &rfds)) {
// printf("goto data on stdin quit\n");
// return 0;
//}
if(FD_ISSET(notifyfd, &rfds)) {
write(acquire_partial_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
if(handle_inotify_event(notifyfd) > 0) {
write(acquire_full_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
}
write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
}
if(FD_ISSET(eventfd, &rfds)) {
write(acquire_partial_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
res = read(eventfd, &event, sizeof(event));
if(res < (int)sizeof(event)) {
fprintf(stderr, "could not get event\n");
write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
return 1;
}
if(event.type == EV_PWR && event.code == KEY_SLEEP) {
event_sleep = event.value;
}
if(event.type == EV_KEY || (event.type == EV_SW && event.code == SW_0 && event.value == 1)) {
gotkey = 1;
if(user_activity_fd >= 0) {
char buf[32];
int len;
len = sprintf(buf, "%ld%06lu000", event.time.tv_sec, event.time.tv_usec);
write(user_activity_fd, buf, len);
}
if(lcd_light_time | key_light_time) {
tv.tv_sec = key_light_time;
light_event.value = 1;
write(eventfd, &light_event, sizeof(light_event));
light_event2.value = 1;
write(eventfd, &light_event2, sizeof(light_event2));
}
else {
tv.tv_sec = idle_time;
}
tv.tv_usec = 0;
if(verbose > 1)
printf("got %s %s %d%s\n", event.type == EV_KEY ? "key" : "switch", event.value ? "down" : "up", event.code, event_sleep ? " from sleep" : "");
if(event.code == KEY_POWER) {
if(event.value == 0) {
int tmp_got_power_key_down = got_power_key_down;
got_power_key_down = 0;
if(tmp_got_power_key_down) {
// power key released
if(verbose > 0)
printf("Power key released - sleep\n");
write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
goto sleep;
}
}
else if(event_sleep == 0) {
got_power_key_down = 1;
power_key_down_time = event.time;
}
}
}
if(event.type == EV_SW && event.code == SW_0 && event.value == 0) {
if(verbose > 0)
printf("Flip closed - sleep\n");
power_key_down_time = event.time;
write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
goto sleep;
}
write(release_wake_lock_fd, wakelockstring, sizeof(wakelockstring) - 1);
}
}
if(0) {
light_off:
light_event.value = 0;
write(eventfd, &light_event, sizeof(light_event));
tv.tv_sec = idle_time - lcd_light_time;
}
if(0) {
light2_off:
light_event2.value = 0;
write(eventfd, &light_event2, sizeof(light_event2));
tv.tv_sec = lcd_light_time - key_light_time;
}
if(0) {
sleep:
if(light_event.value == 1) {
light_event.value = 0;
write(eventfd, &light_event, sizeof(light_event));
light_event2.value = 0;
write(eventfd, &light_event2, sizeof(light_event2));
tv.tv_sec = idle_time - lcd_light_time;
}
if(powerfd_is_sleep) {
char buf[32];
int len;
len = sprintf(buf, "%ld%06lu000", power_key_down_time.tv_sec, power_key_down_time.tv_usec);
write(powerfd, buf, len);
}
else
write(powerfd, suspendstring, sizeof(suspendstring) - 1);
gotkey = 0;
tv.tv_sec = 0;
tv.tv_usec = 500000;
}
}
return 0;
}
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