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 "power_button.hpp"
18 
19 #include "button_handler.hpp"
20 
21 // add the button iface class to registry
22 static ButtonIFRegister<PowerButton>
23     multiButtonRegister(phosphor::button::numberOfChassis());
24 
25 void PowerButton::simPress()
26 {
27     pressed();
28 }
29 
30 void PowerButton::simLongPress()
31 {
32     pressedLong();
33 }
34 
35 void PowerButton::updatePressedTime()
36 {
37     pressedTime = std::chrono::steady_clock::now();
38 }
39 
40 auto PowerButton::getPressTime() const
41 {
42     return pressedTime;
43 }
44 
45 void PowerButton::handleEvent(sd_event_source* /* es */, int fd,
46                               uint32_t /* revents */)
47 {
48     int n = -1;
49     char buf = '0';
50 
51     n = ::lseek(fd, 0, SEEK_SET);
52 
53     if (n < 0)
54     {
55         phosphor::logging::log<phosphor::logging::level::ERR>(
56             "POWER_BUTTON: lseek error!");
57         return;
58     }
59 
60     n = ::read(fd, &buf, sizeof(buf));
61     if (n < 0)
62     {
63         phosphor::logging::log<phosphor::logging::level::ERR>(
64             "POWER_BUTTON: read error!");
65         return;
66     }
67 
68     if (buf == '0')
69     {
70         phosphor::logging::log<phosphor::logging::level::DEBUG>(
71             "POWER_BUTTON: pressed");
72 
73         updatePressedTime();
74         // emit pressed signal
75         pressed();
76     }
77     else
78     {
79         phosphor::logging::log<phosphor::logging::level::DEBUG>(
80             "POWER_BUTTON: released");
81 
82         auto now = std::chrono::steady_clock::now();
83         auto d = std::chrono::duration_cast<std::chrono::microseconds>(
84             now - getPressTime());
85         // released
86         released(d.count());
87     }
88 }
89