102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2012 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 <errno.h>
|
|
#include <fcntl.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
|
|
#define LOG_TAG "libsuspend"
|
|
#include <cutils/log.h>
|
|
|
|
#include "autosuspend_ops.h"
|
|
|
|
#define SYS_POWER_AUTOSLEEP "/sys/power/autosleep"
|
|
|
|
static int autosleep_fd;
|
|
static const char *sleep_state = "mem";
|
|
static const char *on_state = "off";
|
|
|
|
static int autosuspend_autosleep_enable(void)
|
|
{
|
|
char buf[80];
|
|
int ret;
|
|
|
|
ALOGV("autosuspend_autosleep_enable\n");
|
|
|
|
ret = TEMP_FAILURE_RETRY(write(autosleep_fd, sleep_state, strlen(sleep_state)));
|
|
if (ret < 0) {
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
ALOGE("Error writing to %s: %s\n", SYS_POWER_AUTOSLEEP, buf);
|
|
goto err;
|
|
}
|
|
|
|
ALOGV("autosuspend_autosleep_enable done\n");
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static int autosuspend_autosleep_disable(void)
|
|
{
|
|
char buf[80];
|
|
int ret;
|
|
|
|
ALOGV("autosuspend_autosleep_disable\n");
|
|
|
|
ret = TEMP_FAILURE_RETRY(write(autosleep_fd, on_state, strlen(on_state)));
|
|
if (ret < 0) {
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
ALOGE("Error writing to %s: %s\n", SYS_POWER_AUTOSLEEP, buf);
|
|
goto err;
|
|
}
|
|
|
|
ALOGV("autosuspend_autosleep_disable done\n");
|
|
|
|
return 0;
|
|
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
struct autosuspend_ops autosuspend_autosleep_ops = {
|
|
.enable = autosuspend_autosleep_enable,
|
|
.disable = autosuspend_autosleep_disable,
|
|
};
|
|
|
|
struct autosuspend_ops *autosuspend_autosleep_init(void)
|
|
{
|
|
char buf[80];
|
|
|
|
autosleep_fd = TEMP_FAILURE_RETRY(open(SYS_POWER_AUTOSLEEP, O_WRONLY));
|
|
if (autosleep_fd < 0) {
|
|
strerror_r(errno, buf, sizeof(buf));
|
|
ALOGE("Error opening %s: %s\n", SYS_POWER_AUTOSLEEP, buf);
|
|
return NULL;
|
|
}
|
|
|
|
ALOGI("Selected autosleep\n");
|
|
|
|
autosuspend_autosleep_disable();
|
|
|
|
return &autosuspend_autosleep_ops;
|
|
}
|