1 /*
2 // Copyright (c) 2018 Intel Corporation
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 "id_button.hpp"
18 
19 // add the button iface class to registry
20 static ButtonIFRegister<IDButton> buttonRegister;
21 
22 void IDButton::simPress()
23 {
24     pressed();
25 }
26 
27 void IDButton::handleEvent(sd_event_source* /* es */, int fd,
28                            uint32_t /* revents */)
29 {
30     int n = -1;
31     char buf = '0';
32     n = ::lseek(fd, 0, SEEK_SET);
33 
34     if (n < 0)
35     {
36         phosphor::logging::log<phosphor::logging::level::ERR>(
37             (getFormFactorType() + " : lseek error!").c_str());
38         return;
39     }
40 
41     n = ::read(fd, &buf, sizeof(buf));
42     if (n < 0)
43     {
44         phosphor::logging::log<phosphor::logging::level::ERR>(
45             (getFormFactorType() + " : read error!").c_str());
46         return;
47     }
48 
49     if (buf == '0')
50     {
51         phosphor::logging::log<phosphor::logging::level::DEBUG>(
52             (getFormFactorType() + " : pressed").c_str());
53         // emit pressed signal
54         pressed();
55     }
56     else
57     {
58         phosphor::logging::log<phosphor::logging::level::DEBUG>(
59             (getFormFactorType() + " : released").c_str());
60         // released
61         released();
62     }
63 }
64