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
SensorBase(const char * dev_name,const char * data_name)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
~SensorBase()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
open_device()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
close_device()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
getFd() const119 int SensorBase::getFd() const
120 {
121 if (!data_name) {
122 return dev_fd;
123 }
124 return data_fd;
125 }
126
setDelay(int32_t handle,int64_t ns)127 int SensorBase::setDelay(int32_t handle, int64_t ns)
128 {
129 return 0;
130 }
131
hasPendingEvents() const132 bool SensorBase::hasPendingEvents() const
133 {
134 return false;
135 }
136
getTimestamp()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
openInput(const char * inputName)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
enable(int32_t handle,int enabled)188 int SensorBase::enable(int32_t handle, int enabled)
189 {
190 return 0;
191 }
192
query(int what,int * value)193 int SensorBase::query(int what, int* value)
194 {
195 return 0;
196 }
197
batch(int handle,int flags,int64_t period_ns,int64_t timeout)198 int SensorBase::batch(int handle, int flags, int64_t period_ns, int64_t timeout)
199 {
200 return 0;
201 }
202
flush(int handle)203 int SensorBase::flush(int handle)
204 {
205 return 0;
206 }
207