120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
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/*
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* Copyright (c) 2014 The CyanogenMod 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 <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <ctype.h>
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#define LOG_TAG "PowerHAL_H_Ext"
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#include <utils/Log.h>
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#define MAX_INPUTS 20
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#define INPUT_PREFIX "/sys/class/input/input"
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#define MAX_PATH_SIZE (strlen(INPUT_PREFIX) + 20)
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static const char *names[] = { "sec_touchscreen", "gpio-keys" };
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#define N_NAMES (sizeof(names) / sizeof(names[0]))
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static char *paths[N_NAMES];
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static int have_found_paths;
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static size_t sysfs_read(char *path, char *buffer, size_t n)
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{
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char buf[80];
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int fd;
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ssize_t len;
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if ((fd = open(path, O_RDONLY)) < 0) {
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if (errno != ENOENT) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error opening %s: %s\n", path, buf);
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}
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return 0;
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}
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len = read(fd, buffer, n);
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if (len < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error reading from %s: %s\n", path, buf);
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return 0;
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}
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while (len > 0 && isspace(buffer[len-1])) len--;
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if ((size_t) len < n) buffer[len] = '\0';
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close(fd);
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return len;
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}
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static void sysfs_write(char *path, char *s)
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{
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char buf[80];
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int len;
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int fd;
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if (path == NULL) return;
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if ((fd = open(path, O_WRONLY)) < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error opening %s: %s\n", path, buf);
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return;
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}
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len = write(fd, s, strlen(s));
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if (len < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error writing to %s: %s\n", path, buf);
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}
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close(fd);
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}
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static void
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find_paths(void)
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{
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size_t i, j;
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char path[MAX_PATH_SIZE];
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char name[20];
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for (i = 0; i < MAX_INPUTS; i++) {
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sprintf(path, "%s%d/name", INPUT_PREFIX, i);
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if (sysfs_read(path, name, sizeof(name)) > 0) {
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for (j = 0; j < N_NAMES; j++) {
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if (strcmp(name, names[j]) == 0) {
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paths[j] = malloc(MAX_PATH_SIZE);
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sprintf(paths[j], "%s%d/enabled", INPUT_PREFIX, i);
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ALOGD("%s => %s\n", names[j], paths[j]);
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}
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}
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}
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}
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}
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void cm_power_set_interactive_ext(int on)
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{
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size_t i;
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ALOGD("%s: %s input devices", __func__, on ? "enabling" : "disabling");
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if (! have_found_paths) {
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find_paths();
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have_found_paths = 1;
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}
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for (i = 0; i < N_NAMES; i++) sysfs_write(paths[i], on ? "1" : "0");
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}
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