1 /* 2 * Copyright (C) 2012 Invensense, Inc. 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 <fcntl.h> 18 #include <errno.h> 19 #include <math.h> 20 #include <poll.h> 21 #include <unistd.h> 22 #include <stdlib.h> 23 #include <dirent.h> 24 #include <sys/select.h> 25 #include <cutils/log.h> 26 #include <linux/input.h> 27 28 #include <cutils/properties.h> 29 30 #include "SensorBase.h" 31 32 /*****************************************************************************/ 33 34 // static vars 35 bool SensorBase::PROCESS_VERBOSE = false; 36 bool SensorBase::EXTRA_VERBOSE = false; 37 bool SensorBase::SYSFS_VERBOSE = false; 38 39 bool SensorBase::FUNC_ENTRY = false; 40 bool SensorBase::HANDLER_ENTRY = false; 41 bool SensorBase::ENG_VERBOSE = false; 42 bool SensorBase::INPUT_DATA = false; 43 bool SensorBase::HANDLER_DATA = false; 44 45 SensorBase::SensorBase(const char* dev_name, 46 const char* data_name) 47 : dev_name(dev_name), 48 data_name(data_name), 49 dev_fd(-1), 50 data_fd(-1) 51 { 52 if (data_name) { 53 data_fd = openInput(data_name); 54 } 55 56 char value[PROPERTY_VALUE_MAX]; 57 property_get("invn.hal.verbose.basic", value, "0"); 58 if (atoi(value)) { 59 PROCESS_VERBOSE = true; 60 } 61 property_get("invn.hal.verbose.extra", value, "0"); 62 if (atoi(value)) { 63 EXTRA_VERBOSE = true; 64 } 65 property_get("invn.hal.verbose.sysfs", value, "0"); 66 if (atoi(value)) { 67 SYSFS_VERBOSE = true; 68 } 69 property_get("invn.hal.verbose.engineering", value, "0"); 70 if (atoi(value)) { 71 ENG_VERBOSE = true; 72 } 73 property_get("invn.hal.entry.function", value, "0"); 74 if (atoi(value)) { 75 FUNC_ENTRY = true; 76 } 77 property_get("invn.hal.entry.handler", value, "0"); 78 if (atoi(value)) { 79 HANDLER_ENTRY = true; 80 } 81 property_get("invn.hal.data.input", value, "0"); 82 if (atoi(value)) { 83 INPUT_DATA = true; 84 } 85 property_get("invn.hal.data.handler", value, "0"); 86 if (atoi(value)) { 87 HANDLER_DATA = true; 88 } 89 } 90 91 SensorBase::~SensorBase() 92 { 93 if (data_fd >= 0) { 94 close(data_fd); 95 } 96 if (dev_fd >= 0) { 97 close(dev_fd); 98 } 99 } 100 101 int SensorBase::open_device() 102 { 103 if (dev_fd<0 && dev_name) { 104 dev_fd = open(dev_name, O_RDONLY); 105 LOGE_IF(dev_fd<0, "Couldn't open %s (%s)", dev_name, strerror(errno)); 106 } 107 return 0; 108 } 109 110 int SensorBase::close_device() 111 { 112 if (dev_fd >= 0) { 113 close(dev_fd); 114 dev_fd = -1; 115 } 116 return 0; 117 } 118 119 int SensorBase::getFd() const 120 { 121 if (!data_name) { 122 return dev_fd; 123 } 124 return data_fd; 125 } 126 127 int SensorBase::setDelay(int32_t handle, int64_t ns) 128 { 129 return 0; 130 } 131 132 bool SensorBase::hasPendingEvents() const 133 { 134 return false; 135 } 136 137 int64_t SensorBase::getTimestamp() 138 { 139 struct timespec t; 140 t.tv_sec = t.tv_nsec = 0; 141 clock_gettime(CLOCK_MONOTONIC, &t); 142 return int64_t(t.tv_sec) * 1000000000LL + t.tv_nsec; 143 } 144 145 int SensorBase::openInput(const char *inputName) 146 { 147 int fd = -1; 148 const char *dirname = "/dev/input"; 149 char devname[PATH_MAX]; 150 char *filename; 151 DIR *dir; 152 struct dirent *de; 153 dir = opendir(dirname); 154 if(dir == NULL) 155 return -1; 156 strcpy(devname, dirname); 157 filename = devname + strlen(devname); 158 *filename++ = '/'; 159 while((de = readdir(dir))) { 160 if(de->d_name[0] == '.' && 161 (de->d_name[1] == '\0' || 162 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 163 continue; 164 strcpy(filename, de->d_name); 165 fd = open(devname, O_RDONLY); 166 LOGV_IF(EXTRA_VERBOSE, "path open %s", devname); 167 LOGI("path open %s", devname); 168 if (fd >= 0) { 169 char name[80]; 170 if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { 171 name[0] = '\0'; 172 } 173 LOGV_IF(EXTRA_VERBOSE, "name read %s", name); 174 if (!strcmp(name, inputName)) { 175 strcpy(input_name, filename); 176 break; 177 } else { 178 close(fd); 179 fd = -1; 180 } 181 } 182 } 183 closedir(dir); 184 LOGE_IF(fd < 0, "couldn't find '%s' input device", inputName); 185 return fd; 186 } 187 188 int SensorBase::enable(int32_t handle, int enabled) 189 { 190 return 0; 191 } 192 193 int SensorBase::query(int what, int* value) 194 { 195 return 0; 196 } 197 198 int SensorBase::batch(int handle, int flags, int64_t period_ns, int64_t timeout) 199 { 200 return 0; 201 } 202 203 int SensorBase::flush(int handle) 204 { 205 return 0; 206 } 207
