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 <string.h> 24 #include <dirent.h> 25 #include <sys/select.h> 26 #include <cutils/log.h> 27 #include <linux/input.h> 28 29 #include <cutils/properties.h> 30 31 #include "SensorBase.h" 32 33 /*****************************************************************************/ 34 35 // static vars 36 bool SensorBase::PROCESS_VERBOSE = false; 37 bool SensorBase::EXTRA_VERBOSE = false; 38 bool SensorBase::SYSFS_VERBOSE = false; 39 40 bool SensorBase::FUNC_ENTRY = false; 41 bool SensorBase::HANDLER_ENTRY = false; 42 bool SensorBase::ENG_VERBOSE = false; 43 bool SensorBase::INPUT_DATA = false; 44 bool SensorBase::HANDLER_DATA = false; 45 46 SensorBase::SensorBase(const char* dev_name, 47 const char* data_name) 48 : dev_name(dev_name), 49 data_name(data_name), 50 dev_fd(-1), 51 data_fd(-1) 52 { 53 if (data_name) { 54 data_fd = openInput(data_name); 55 } 56 57 char value[PROPERTY_VALUE_MAX]; 58 property_get("invn.hal.verbose.basic", value, "0"); 59 if (atoi(value)) { 60 PROCESS_VERBOSE = true; 61 } 62 property_get("invn.hal.verbose.extra", value, "0"); 63 if (atoi(value)) { 64 EXTRA_VERBOSE = true; 65 } 66 property_get("invn.hal.verbose.sysfs", value, "0"); 67 if (atoi(value)) { 68 SYSFS_VERBOSE = true; 69 } 70 property_get("invn.hal.verbose.engineering", value, "0"); 71 if (atoi(value)) { 72 ENG_VERBOSE = true; 73 } 74 property_get("invn.hal.entry.function", value, "0"); 75 if (atoi(value)) { 76 FUNC_ENTRY = true; 77 } 78 property_get("invn.hal.entry.handler", value, "0"); 79 if (atoi(value)) { 80 HANDLER_ENTRY = true; 81 } 82 property_get("invn.hal.data.input", value, "0"); 83 if (atoi(value)) { 84 INPUT_DATA = true; 85 } 86 property_get("invn.hal.data.handler", value, "0"); 87 if (atoi(value)) { 88 HANDLER_DATA = true; 89 } 90 } 91 92 SensorBase::~SensorBase() 93 { 94 if (data_fd >= 0) { 95 close(data_fd); 96 } 97 if (dev_fd >= 0) { 98 close(dev_fd); 99 } 100 } 101 102 int SensorBase::open_device() 103 { 104 if (dev_fd<0 && dev_name) { 105 dev_fd = open(dev_name, O_RDONLY); 106 LOGE_IF(dev_fd<0, "Couldn't open %s (%s)", dev_name, strerror(errno)); 107 } 108 return 0; 109 } 110 111 int SensorBase::close_device() 112 { 113 if (dev_fd >= 0) { 114 close(dev_fd); 115 dev_fd = -1; 116 } 117 return 0; 118 } 119 120 int SensorBase::getFd() const 121 { 122 if (!data_name) { 123 return dev_fd; 124 } 125 return data_fd; 126 } 127 128 int SensorBase::setDelay(int32_t handle, int64_t ns) 129 { 130 return 0; 131 } 132 133 bool SensorBase::hasPendingEvents() const 134 { 135 return false; 136 } 137 138 int64_t SensorBase::getTimestamp() 139 { 140 struct timespec t; 141 t.tv_sec = t.tv_nsec = 0; 142 clock_gettime(CLOCK_MONOTONIC, &t); 143 return int64_t(t.tv_sec) * 1000000000LL + t.tv_nsec; 144 } 145 146 int SensorBase::openInput(const char *inputName) 147 { 148 int fd = -1; 149 const char *dirname = "/dev/input"; 150 char devname[PATH_MAX]; 151 char *filename; 152 DIR *dir; 153 struct dirent *de; 154 dir = opendir(dirname); 155 if(dir == NULL) 156 return -1; 157 strcpy(devname, dirname); 158 filename = devname + strlen(devname); 159 *filename++ = '/'; 160 while((de = readdir(dir))) { 161 if(de->d_name[0] == '.' && 162 (de->d_name[1] == '\0' || 163 (de->d_name[1] == '.' && de->d_name[2] == '\0'))) 164 continue; 165 strcpy(filename, de->d_name); 166 fd = open(devname, O_RDONLY); 167 LOGV_IF(EXTRA_VERBOSE, "path open %s", devname); 168 LOGI("path open %s", devname); 169 if (fd >= 0) { 170 char name[80]; 171 if (ioctl(fd, EVIOCGNAME(sizeof(name) - 1), &name) < 1) { 172 name[0] = '\0'; 173 } 174 LOGV_IF(EXTRA_VERBOSE, "name read %s", name); 175 if (!strcmp(name, inputName)) { 176 strcpy(input_name, filename); 177 break; 178 } else { 179 close(fd); 180 fd = -1; 181 } 182 } 183 } 184 closedir(dir); 185 LOGE_IF(fd < 0, "couldn't find '%s' input device", inputName); 186 return fd; 187 } 188 189 int SensorBase::enable(int32_t handle, int enabled) 190 { 191 return 0; 192 } 193 194 int SensorBase::query(int what, int* value) 195 { 196 return 0; 197 } 198 199 int SensorBase::batch(int handle, int flags, int64_t period_ns, int64_t timeout) 200 { 201 return 0; 202 } 203 204 int SensorBase::flush(int handle) 205 { 206 return 0; 207 } 208
