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
SensorBase(const char * dev_name,const char * data_name)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
~SensorBase()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
open_device()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
close_device()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
getFd() const120 int SensorBase::getFd() const
121 {
122 if (!data_name) {
123 return dev_fd;
124 }
125 return data_fd;
126 }
127
setDelay(int32_t handle,int64_t ns)128 int SensorBase::setDelay(int32_t handle, int64_t ns)
129 {
130 return 0;
131 }
132
hasPendingEvents() const133 bool SensorBase::hasPendingEvents() const
134 {
135 return false;
136 }
137
getTimestamp()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
openInput(const char * inputName)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
enable(int32_t handle,int enabled)189 int SensorBase::enable(int32_t handle, int enabled)
190 {
191 return 0;
192 }
193
query(int what,int * value)194 int SensorBase::query(int what, int* value)
195 {
196 return 0;
197 }
198
batch(int handle,int flags,int64_t period_ns,int64_t timeout)199 int SensorBase::batch(int handle, int flags, int64_t period_ns, int64_t timeout)
200 {
201 return 0;
202 }
203
flush(int handle)204 int SensorBase::flush(int handle)
205 {
206 return 0;
207 }
208