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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "VibratorService"
     18 
     19 #include "jni.h"
     20 #include "JNIHelp.h"
     21 #include "android_runtime/AndroidRuntime.h"
     22 
     23 #include <utils/misc.h>
     24 #include <utils/Log.h>
     25 #include <hardware/vibrator.h>
     26 
     27 #include <stdio.h>
     28 
     29 namespace android
     30 {
     31 
     32 static hw_module_t *gVibraModule = NULL;
     33 static vibrator_device_t *gVibraDevice = NULL;
     34 
     35 static void vibratorInit(JNIEnv /* env */, jobject /* clazz */)
     36 {
     37     if (gVibraModule != NULL) {
     38         return;
     39     }
     40 
     41     int err = hw_get_module(VIBRATOR_HARDWARE_MODULE_ID, (hw_module_t const**)&gVibraModule);
     42 
     43     if (err) {
     44         ALOGE("Couldn't load %s module (%s)", VIBRATOR_HARDWARE_MODULE_ID, strerror(-err));
     45     } else {
     46         if (gVibraModule) {
     47             vibrator_open(gVibraModule, &gVibraDevice);
     48         }
     49     }
     50 }
     51 
     52 static jboolean vibratorExists(JNIEnv* /* env */, jobject /* clazz */)
     53 {
     54     if (gVibraModule && gVibraDevice) {
     55         return JNI_TRUE;
     56     } else {
     57         return JNI_FALSE;
     58     }
     59 }
     60 
     61 static void vibratorOn(JNIEnv* /* env */, jobject /* clazz */, jlong timeout_ms)
     62 {
     63     if (gVibraDevice) {
     64         int err = gVibraDevice->vibrator_on(gVibraDevice, timeout_ms);
     65         if (err != 0) {
     66             ALOGE("The hw module failed in vibrator_on: %s", strerror(-err));
     67         }
     68     } else {
     69         ALOGW("Tried to vibrate but there is no vibrator device.");
     70     }
     71 }
     72 
     73 static void vibratorOff(JNIEnv* /* env */, jobject /* clazz */)
     74 {
     75     if (gVibraDevice) {
     76         int err = gVibraDevice->vibrator_off(gVibraDevice);
     77         if (err != 0) {
     78             ALOGE("The hw module failed in vibrator_off(): %s", strerror(-err));
     79         }
     80     } else {
     81         ALOGW("Tried to stop vibrating but there is no vibrator device.");
     82     }
     83 }
     84 
     85 static const JNINativeMethod method_table[] = {
     86     { "vibratorExists", "()Z", (void*)vibratorExists },
     87     { "vibratorInit", "()V", (void*)vibratorInit },
     88     { "vibratorOn", "(J)V", (void*)vibratorOn },
     89     { "vibratorOff", "()V", (void*)vibratorOff }
     90 };
     91 
     92 int register_android_server_VibratorService(JNIEnv *env)
     93 {
     94     return jniRegisterNativeMethods(env, "com/android/server/VibratorService",
     95             method_table, NELEM(method_table));
     96 }
     97 
     98 };
     99