1 /**
2  * Copyright © 2017 IBM 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 #include <iostream>
17 #include <phosphor-logging/log.hpp>
18 #include <systemd/sd-daemon.h>
19 #include "argument.hpp"
20 #include "config.h"
21 #include "event.hpp"
22 #include "power_supply.hpp"
23 #include "device_monitor.hpp"
24 
25 using namespace witherspoon::power;
26 using namespace phosphor::logging;
27 
28 int main(int argc, char* argv[])
29 {
30     auto options = ArgumentParser(argc, argv);
31 
32     auto objpath = (options)["path"];
33     auto instnum = (options)["instance"];
34     auto invpath = (options)["inventory"];
35     if (argc < 4)
36     {
37         std::cerr << std::endl << "Too few arguments" << std::endl;
38         options.usage(argv);
39         return -1;
40     }
41 
42     if (objpath == ArgumentParser::emptyString)
43     {
44         log<level::ERR>("Device monitoring path argument required");
45         return -2;
46     }
47 
48     if (instnum == ArgumentParser::emptyString)
49     {
50         log<level::ERR>("Device monitoring instance number argument required");
51         return -3;
52     }
53 
54     if (invpath == ArgumentParser::emptyString)
55     {
56         log<level::ERR>("Device monitoring inventory path argument required");
57         return -4;
58     }
59 
60     sd_event* events = nullptr;
61 
62     auto r = sd_event_default(&events);
63     if (r < 0)
64     {
65         log<level::ERR>("Failed call to sd_event_default()",
66                         entry("ERROR=%s", strerror(-r)));
67         return -5;
68     }
69 
70     auto bus = sdbusplus::bus::new_default();
71     witherspoon::power::event::Event eventPtr{events};
72 
73     //Attach the event object to the bus object so we can
74     //handle both sd_events (for the timers) and dbus signals.
75     bus.attach_event(eventPtr.get(), SD_EVENT_PRIORITY_NORMAL);
76 
77     auto objname = "power_supply" + instnum;
78     auto instance = std::stoul(instnum);
79     // The state changes from 0 to 1 when the BMC_POWER_UP line to the power
80     // sequencer is asserted. It can take 50ms for the sequencer to assert the
81     // ENABLE# line that goes to the power supplies. The Witherspoon power
82     // supply can take a max of 100ms from ENABLE# asserted to 12V in spec.
83     // Once 12V in spec., the power supply will nominally take 1 second to
84     // assert DC_GOOD (and update POWER_GOOD Negated), +/1 100ms. That would
85     // give us a 1250ms delay from state=1 to checking STATUS_WORD, however,
86     // the sysfs files will only be updated by the ibm-cffps device driver once
87     // a second, so rounding up from 1 to 5 seconds.
88     std::chrono::seconds powerOnDelay(5);
89     // Timer to delay setting internal presence tracking. Allows for servicing
90     // the power supply.
91     std::chrono::seconds presentDelay(2);
92     auto psuDevice = std::make_unique<psu::PowerSupply>(objname,
93                                                         std::move(instance),
94                                                         std::move(objpath),
95                                                         std::move(invpath),
96                                                         bus,
97                                                         eventPtr,
98                                                         powerOnDelay,
99                                                         presentDelay);
100 
101     // Get the number of input power history records to keep in D-Bus.
102     long int numRecords = 0;
103     auto records = (options)["num-history-records"];
104     if (records != ArgumentParser::emptyString)
105     {
106         numRecords = std::stol(records);
107         if (numRecords < 0)
108         {
109             std::cerr << "Invalid number of history records specified.\n";
110             return -6;
111         }
112     }
113 
114     if (numRecords != 0)
115     {
116         // Get the GPIO information for controlling the SYNC signal.
117         // If one is there, they both must be.
118         auto syncGPIOPath = (options)["sync-gpio-path"];
119         auto syncGPIONum = (options)["sync-gpio-num"];
120 
121         if (((syncGPIOPath == ArgumentParser::emptyString) &&
122             (syncGPIONum != ArgumentParser::emptyString)) ||
123             ((syncGPIOPath != ArgumentParser::emptyString) &&
124             (syncGPIONum == ArgumentParser::emptyString)))
125         {
126             std::cerr << "Invalid sync GPIO number or path\n";
127             return -7;
128         }
129 
130         size_t gpioNum = 0;
131         if (syncGPIONum != ArgumentParser::emptyString)
132         {
133             gpioNum = stoul(syncGPIONum);
134         }
135 
136         std::string name{"ps" + instnum + "_input_power"};
137         std::string basePath =
138             std::string{INPUT_HISTORY_SENSOR_ROOT} + '/' + name;
139 
140         psuDevice->enableHistory(basePath,
141                                  numRecords,
142                                  syncGPIOPath,
143                                  gpioNum);
144 
145         // Systemd object manager
146         sdbusplus::server::manager::manager objManager{bus, basePath.c_str()};
147 
148         std::string busName =
149                 std::string{INPUT_HISTORY_BUSNAME_ROOT} + '.' + name;
150         bus.request_name(busName.c_str());
151     }
152 
153     auto pollInterval = std::chrono::milliseconds(1000);
154     DeviceMonitor mainloop(std::move(psuDevice), eventPtr, pollInterval);
155     mainloop.run();
156 
157     return 0;
158 }
159