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/*
* 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 <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#define LOG_TAG "Legacy PowerHAL"
#include <utils/Log.h>
#include <hardware/hardware.h>
#include <hardware/power.h>
/*
* This module implements the legacy interface for requesting early
* suspend and late resume
*/
#define LEGACY_SYS_POWER_STATE "/sys/power/state"
static int sPowerStatefd;
static const char *pwr_states[] = { "mem", "on" };
static void power_init(struct power_module *module)
{
char buf[80];
sPowerStatefd = open(LEGACY_SYS_POWER_STATE, O_RDWR);
if (sPowerStatefd < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error opening %s: %s\n", LEGACY_SYS_POWER_STATE, buf);
}
}
static void power_set_interactive(struct power_module *module, int on)
{
char buf[80];
int len;
len = write(sPowerStatefd, pwr_states[!!on], strlen(pwr_states[!!on]));
if (len < 0) {
strerror_r(errno, buf, sizeof(buf));
ALOGE("Error writing to %s: %s\n", LEGACY_SYS_POWER_STATE, buf);
}
}
static void power_hint(struct power_module *module, power_hint_t hint,
void *data) {
switch (hint) {
default:
break;
}
}
static struct hw_module_methods_t power_module_methods = {
.open = NULL,
};
struct power_module HAL_MODULE_INFO_SYM = {
.common = {
.tag = HARDWARE_MODULE_TAG,
.version_major = 1,
.version_minor = 0,
.id = POWER_HARDWARE_MODULE_ID,
.name = "Default Power HAL",
.author = "The Android Open Source Project",
.methods = &power_module_methods,
},
.init = power_init,
.setInteractive = power_set_interactive,
.powerHint = power_hint,
};
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