77 lines
2.1 KiB
C
77 lines
2.1 KiB
C
/*
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* Copyright (C) 2020 The LineageOS Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <dirent.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include "power-feature.h"
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#include <hardware/power.h>
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#include <linux/input.h>
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#include <log/log.h>
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int open_ts_input() {
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int fd = -1;
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DIR *dir = opendir("/dev/input");
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if (dir != NULL) {
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struct dirent *ent;
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while ((ent = readdir(dir)) != NULL) {
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if (ent->d_type == DT_CHR) {
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char absolute_path[PATH_MAX] = {0};
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char name[80] = {0};
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strcpy(absolute_path, "/dev/input/");
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strcat(absolute_path, ent->d_name);
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fd = open(absolute_path, O_RDWR);
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if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) > 0) {
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if (strcmp(name, "goodix_ts") == 0)
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break;
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}
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close(fd);
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fd = -1;
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}
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}
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closedir(dir);
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}
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return fd;
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}
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void set_device_specific_feature(feature_t feature, int state) {
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switch (feature) {
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case POWER_FEATURE_DOUBLE_TAP_TO_WAKE: {
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int fd = open_ts_input();
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if (fd == -1) {
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ALOGW("DT2W won't work because no supported touchscreen input devices were found");
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return;
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}
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struct input_event ev;
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ev.type = EV_SYN;
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ev.code = SYN_CONFIG;
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ev.value = state ? INPUT_EVENT_WAKUP_MODE_ON : INPUT_EVENT_WAKUP_MODE_OFF;
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write(fd, &ev, sizeof(ev));
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close(fd);
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}
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}
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}
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