100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
/*
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* Copyright (C) 2011 CyanogenMod Project
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* Copyright (C) 2011 Daniel Hillenbrand
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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 <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#define LOG_NDEBUG 0
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#define LOG_TAG "tspdrv"
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#include <utils/Log.h>
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#include "tspdrv.h"
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int sendit(int timeout_ms)
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{
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int nwr, ret, fd, tspd, tspret, actuators;
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char value[20];
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tspd = open(TSPDRV_DEVICE, O_RDWR);
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if(tspd < 0) {
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LOGE("failed on opening /dev/tspdrv\n");
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} else {
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LOGV("opened device /dev/tspdrv\n");
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}
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/* send tspdrv magic number */
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tspret = ioctl(tspd, TSPDRV_MAGIC_NUMBER);
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if(tspret != 0) {
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LOGE("TSPDRV_MAGIC_NUMBER error\n");
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} else {
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LOGV("TSPDRV_MAGIC_NUMBER success\n");
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}
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/* get number of actuators */
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actuators = ioctl(tspd, TSPDRV_GET_NUM_ACTUATORS);
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if(actuators < 1) {
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LOGE("TSPDRV_GET_NUM_ACTUATORS error, no actuators available\n");
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} else {
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LOGV("TSPDRV_GET_NUM_ACTUATORS success, actuators = %d\n", actuators);
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if(timeout_ms > 0) {
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/* enable tspdrv amp */
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tspret = ioctl(tspd, TSPDRV_ENABLE_AMP, actuators);
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if(tspret != 0) {
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LOGE("TSPDRV_ENABLE_AMP error\n");
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} else {
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LOGV("TSPDRV_ENABLE_AMP success\n");
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}
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}
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}
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fd = open(THE_DEVICE, O_RDWR);
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if(fd < 0)
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return errno;
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LOGV("timeout_ms: %d\n", timeout_ms);
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nwr = sprintf(value, "%d\n", timeout_ms);
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ret = write(fd, value, nwr);
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if(timeout_ms == 0) {
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/* stop tspdrv kernel timer */
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tspret = ioctl(tspd, TSPDRV_STOP_KERNEL_TIMER);
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if(tspret != 0) {
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LOGE("TSPDRV_STOP_KERNEL_TIMER error\n");
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} else {
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LOGV("TSPDRV_STOP_KERNEL_TIMER success\n");
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}
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/* disable tspdrv amp */
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if(actuators >= 1) {
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tspret = ioctl(tspd, TSPDRV_DISABLE_AMP, actuators);
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if(tspret != 0) {
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LOGE("TSPDRV_DISABLE_AMP error\n");
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} else {
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LOGV("TSPDRV_DISABLE_AMP success\n");
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}
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}
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}
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close(tspd);
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close(fd);
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return (ret == nwr) ? 0 : -1;
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}
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