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/*
* Copyright (C) 2020 The LineageOS 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 <aidl/android/hardware/power/BnPower.h>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <linux/input.h>
namespace {
int open_ts_input() {
int fd = -1;
DIR *dir = opendir("/dev/input");
if (dir != NULL) {
struct dirent *ent;
while ((ent = readdir(dir)) != NULL) {
if (ent->d_type == DT_CHR) {
char absolute_path[PATH_MAX] = {0};
char name[80] = {0};
strcpy(absolute_path, "/dev/input/");
strcat(absolute_path, ent->d_name);
fd = open(absolute_path, O_RDWR);
if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) > 0) {
if (strcmp(name, "fts_ts") == 0 || strcmp(name, "goodix_ts") == 0 ||
strcmp(name, "NVTCapacitiveTouchScreen") == 0)
break;
}
close(fd);
fd = -1;
}
}
closedir(dir);
}
return fd;
}
} // anonymous namespace
namespace aidl {
namespace android {
namespace hardware {
namespace power {
namespace impl {
static constexpr int kInputEventWakeupModeOff = 4;
static constexpr int kInputEventWakeupModeOn = 5;
using ::aidl::android::hardware::power::Mode;
bool isDeviceSpecificModeSupported(Mode type, bool* _aidl_return) {
switch (type) {
case Mode::DOUBLE_TAP_TO_WAKE:
*_aidl_return = true;
return true;
default:
return false;
}
}
bool setDeviceSpecificMode(Mode type, bool enabled) {
switch (type) {
case Mode::DOUBLE_TAP_TO_WAKE: {
int fd = open_ts_input();
if (fd == -1) {
LOG(WARNING)
<< "DT2W won't work because no supported touchscreen input devices were found";
return false;
}
struct input_event ev;
ev.type = EV_SYN;
ev.code = SYN_CONFIG;
ev.value = enabled ? kInputEventWakeupModeOn : kInputEventWakeupModeOff;
write(fd, &ev, sizeof(ev));
close(fd);
return true;
}
default:
return false;
}
}
} // namespace impl
} // namespace power
} // namespace hardware
} // namespace android
} // namespace aidl
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