1 /* 2 * Copyright (C) 2012 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 #include <stdbool.h> 18 19 #define LOG_TAG "libsuspend" 20 #include <cutils/log.h> 21 22 #include <suspend/autosuspend.h> 23 24 #include "autosuspend_ops.h" 25 26 static struct autosuspend_ops *autosuspend_ops; 27 static bool autosuspend_enabled; 28 static bool autosuspend_inited; 29 autosuspend_init(void)30static int autosuspend_init(void) 31 { 32 if (autosuspend_inited) { 33 return 0; 34 } 35 36 autosuspend_ops = autosuspend_earlysuspend_init(); 37 if (autosuspend_ops) { 38 goto out; 39 } 40 41 /* Remove autosleep so userspace can manager suspend/resume and keep stats */ 42 #if 0 43 autosuspend_ops = autosuspend_autosleep_init(); 44 if (autosuspend_ops) { 45 goto out; 46 } 47 #endif 48 49 autosuspend_ops = autosuspend_wakeup_count_init(); 50 if (autosuspend_ops) { 51 goto out; 52 } 53 54 if (!autosuspend_ops) { 55 ALOGE("failed to initialize autosuspend\n"); 56 return -1; 57 } 58 59 out: 60 autosuspend_inited = true; 61 62 ALOGV("autosuspend initialized\n"); 63 return 0; 64 } 65 autosuspend_enable(void)66int autosuspend_enable(void) 67 { 68 int ret; 69 70 ret = autosuspend_init(); 71 if (ret) { 72 return ret; 73 } 74 75 ALOGV("autosuspend_enable\n"); 76 77 if (autosuspend_enabled) { 78 return 0; 79 } 80 81 ret = autosuspend_ops->enable(); 82 if (ret) { 83 return ret; 84 } 85 86 autosuspend_enabled = true; 87 return 0; 88 } 89 autosuspend_disable(void)90int autosuspend_disable(void) 91 { 92 int ret; 93 94 ret = autosuspend_init(); 95 if (ret) { 96 return ret; 97 } 98 99 ALOGV("autosuspend_disable\n"); 100 101 if (!autosuspend_enabled) { 102 return 0; 103 } 104 105 ret = autosuspend_ops->disable(); 106 if (ret) { 107 return ret; 108 } 109 110 autosuspend_enabled = false; 111 return 0; 112 } 113