xref: /openbmc/phosphor-gpio-monitor/gpioMonMain.cpp (revision 1c88803f75c4d5b606345df7bdef318b677f9696)
1939a6431SVijay Khemka /**
2939a6431SVijay Khemka  * Copyright © 2019 Facebook
3939a6431SVijay Khemka  *
4939a6431SVijay Khemka  * Licensed under the Apache License, Version 2.0 (the "License");
5939a6431SVijay Khemka  * you may not use this file except in compliance with the License.
6939a6431SVijay Khemka  * You may obtain a copy of the License at
7939a6431SVijay Khemka  *
8939a6431SVijay Khemka  *     http://www.apache.org/licenses/LICENSE-2.0
9939a6431SVijay Khemka  *
10939a6431SVijay Khemka  * Unless required by applicable law or agreed to in writing, software
11939a6431SVijay Khemka  * distributed under the License is distributed on an "AS IS" BASIS,
12939a6431SVijay Khemka  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13939a6431SVijay Khemka  * See the License for the specific language governing permissions and
14939a6431SVijay Khemka  * limitations under the License.
15939a6431SVijay Khemka  */
16939a6431SVijay Khemka 
17939a6431SVijay Khemka #include "gpioMon.hpp"
18939a6431SVijay Khemka 
19939a6431SVijay Khemka #include <CLI/CLI.hpp>
20854404e0SEd Tanous #include <boost/asio/io_context.hpp>
21939a6431SVijay Khemka #include <nlohmann/json.hpp>
222a8848c6SGeorge Liu #include <phosphor-logging/lg2.hpp>
23939a6431SVijay Khemka 
2439084b4aSPatrick Williams #include <fstream>
2539084b4aSPatrick Williams 
26939a6431SVijay Khemka namespace phosphor
27939a6431SVijay Khemka {
28939a6431SVijay Khemka namespace gpio
29939a6431SVijay Khemka {
30939a6431SVijay Khemka 
31939a6431SVijay Khemka std::map<std::string, int> polarityMap = {
32939a6431SVijay Khemka     /**< Only watch falling edge events. */
33939a6431SVijay Khemka     {"FALLING", GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE},
34939a6431SVijay Khemka     /**< Only watch rising edge events. */
35939a6431SVijay Khemka     {"RISING", GPIOD_LINE_REQUEST_EVENT_RISING_EDGE},
36939a6431SVijay Khemka     /**< Monitor both types of events. */
37939a6431SVijay Khemka     {"BOTH", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES}};
38939a6431SVijay Khemka 
39939a6431SVijay Khemka }
40939a6431SVijay Khemka } // namespace phosphor
41939a6431SVijay Khemka 
main(int argc,char ** argv)42939a6431SVijay Khemka int main(int argc, char** argv)
43939a6431SVijay Khemka {
44854404e0SEd Tanous     boost::asio::io_context io;
45939a6431SVijay Khemka 
46939a6431SVijay Khemka     CLI::App app{"Monitor GPIO line for requested state change"};
47939a6431SVijay Khemka 
48939a6431SVijay Khemka     std::string gpioFileName;
49939a6431SVijay Khemka 
50939a6431SVijay Khemka     /* Add an input option */
51939a6431SVijay Khemka     app.add_option("-c,--config", gpioFileName, "Name of config json file")
52939a6431SVijay Khemka         ->required()
53939a6431SVijay Khemka         ->check(CLI::ExistingFile);
54939a6431SVijay Khemka 
55939a6431SVijay Khemka     /* Parse input parameter */
56939a6431SVijay Khemka     try
57939a6431SVijay Khemka     {
58939a6431SVijay Khemka         app.parse(argc, argv);
59939a6431SVijay Khemka     }
6067554144SPatrick Williams     catch (const CLI::Error& e)
61939a6431SVijay Khemka     {
62939a6431SVijay Khemka         return app.exit(e);
63939a6431SVijay Khemka     }
64939a6431SVijay Khemka 
65939a6431SVijay Khemka     /* Get list of gpio config details from json file */
66939a6431SVijay Khemka     std::ifstream file(gpioFileName);
67939a6431SVijay Khemka     if (!file)
68939a6431SVijay Khemka     {
692a8848c6SGeorge Liu         lg2::error("GPIO monitor config file not found: {FILE}", "FILE",
702a8848c6SGeorge Liu                    gpioFileName);
71939a6431SVijay Khemka         return -1;
72939a6431SVijay Khemka     }
73939a6431SVijay Khemka 
74939a6431SVijay Khemka     nlohmann::json gpioMonObj;
75939a6431SVijay Khemka     file >> gpioMonObj;
76939a6431SVijay Khemka     file.close();
77939a6431SVijay Khemka 
78939a6431SVijay Khemka     std::vector<std::unique_ptr<phosphor::gpio::GpioMonitor>> gpios;
79939a6431SVijay Khemka 
80939a6431SVijay Khemka     for (auto& obj : gpioMonObj)
81939a6431SVijay Khemka     {
82939a6431SVijay Khemka         /* GPIO Line message */
83939a6431SVijay Khemka         std::string lineMsg = "GPIO Line ";
84939a6431SVijay Khemka 
85939a6431SVijay Khemka         /* GPIO line */
86cf33c593SJayanth Othayoth         gpiod_line* line = nullptr;
87939a6431SVijay Khemka 
88939a6431SVijay Khemka         /* GPIO line configuration, default to monitor both edge */
89*1c88803fSPatrick Williams         struct gpiod_line_request_config config{
90*1c88803fSPatrick Williams             "gpio_monitor", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES, 0};
91939a6431SVijay Khemka 
92939a6431SVijay Khemka         /* flag to monitor */
93939a6431SVijay Khemka         bool flag = false;
94939a6431SVijay Khemka 
95939a6431SVijay Khemka         /* target to start */
96939a6431SVijay Khemka         std::string target;
97939a6431SVijay Khemka 
98a66ac0fcSDelphine CC Chiu         /* multi targets to start */
99a66ac0fcSDelphine CC Chiu         std::map<std::string, std::vector<std::string>> targets;
100a66ac0fcSDelphine CC Chiu 
101939a6431SVijay Khemka         if (obj.find("LineName") == obj.end())
102939a6431SVijay Khemka         {
103939a6431SVijay Khemka             /* If there is no line Name defined then gpio num nd chip
104939a6431SVijay Khemka              * id must be defined. GpioNum is integer mapping to the
105939a6431SVijay Khemka              * GPIO key configured by the kernel
106939a6431SVijay Khemka              */
107939a6431SVijay Khemka             if (obj.find("GpioNum") == obj.end() ||
108939a6431SVijay Khemka                 obj.find("ChipId") == obj.end())
109939a6431SVijay Khemka             {
1102a8848c6SGeorge Liu                 lg2::error("Failed to find line name or gpio number: {FILE}",
1112a8848c6SGeorge Liu                            "FILE", gpioFileName);
112939a6431SVijay Khemka                 return -1;
113939a6431SVijay Khemka             }
114939a6431SVijay Khemka 
115939a6431SVijay Khemka             std::string chipIdStr = obj["ChipId"];
116939a6431SVijay Khemka             int gpioNum = obj["GpioNum"];
117939a6431SVijay Khemka 
118939a6431SVijay Khemka             lineMsg += std::to_string(gpioNum);
119939a6431SVijay Khemka 
120939a6431SVijay Khemka             /* Get the GPIO line */
121939a6431SVijay Khemka             line = gpiod_line_get(chipIdStr.c_str(), gpioNum);
122939a6431SVijay Khemka         }
123939a6431SVijay Khemka         else
124939a6431SVijay Khemka         {
125939a6431SVijay Khemka             /* Find the GPIO line */
126939a6431SVijay Khemka             std::string lineName = obj["LineName"];
127939a6431SVijay Khemka             lineMsg += lineName;
128939a6431SVijay Khemka             line = gpiod_line_find(lineName.c_str());
129939a6431SVijay Khemka         }
130939a6431SVijay Khemka 
131cf33c593SJayanth Othayoth         if (line == nullptr)
132939a6431SVijay Khemka         {
13338cd74c8SYang Chen             lg2::error("Failed to find the {GPIO}", "GPIO", lineMsg);
13438cd74c8SYang Chen             continue;
135939a6431SVijay Khemka         }
136939a6431SVijay Khemka 
137939a6431SVijay Khemka         /* Get event to be monitored, if it is not defined then
138939a6431SVijay Khemka          * Both rising falling edge will be monitored.
139939a6431SVijay Khemka          */
140939a6431SVijay Khemka         if (obj.find("EventMon") != obj.end())
141939a6431SVijay Khemka         {
142939a6431SVijay Khemka             std::string eventStr = obj["EventMon"];
143939a6431SVijay Khemka             auto findEvent = phosphor::gpio::polarityMap.find(eventStr);
144939a6431SVijay Khemka             if (findEvent == phosphor::gpio::polarityMap.end())
145939a6431SVijay Khemka             {
1462a8848c6SGeorge Liu                 lg2::error("{GPIO}: event missing: {EVENT}", "GPIO", lineMsg,
1472a8848c6SGeorge Liu                            "EVENT", eventStr);
148939a6431SVijay Khemka                 return -1;
149939a6431SVijay Khemka             }
150939a6431SVijay Khemka 
151939a6431SVijay Khemka             config.request_type = findEvent->second;
152939a6431SVijay Khemka         }
153939a6431SVijay Khemka 
154939a6431SVijay Khemka         /* Get flag if monitoring needs to continue after first event */
155939a6431SVijay Khemka         if (obj.find("Continue") != obj.end())
156939a6431SVijay Khemka         {
157939a6431SVijay Khemka             flag = obj["Continue"];
158939a6431SVijay Khemka         }
159939a6431SVijay Khemka 
160939a6431SVijay Khemka         /* Parse out target argument. It is fine if the user does not
161939a6431SVijay Khemka          * pass this if they are not interested in calling into any target
162939a6431SVijay Khemka          * on meeting a condition.
163939a6431SVijay Khemka          */
164939a6431SVijay Khemka         if (obj.find("Target") != obj.end())
165939a6431SVijay Khemka         {
166939a6431SVijay Khemka             target = obj["Target"];
167939a6431SVijay Khemka         }
168939a6431SVijay Khemka 
169a66ac0fcSDelphine CC Chiu         /* Parse out the targets argument if multi-targets are needed.*/
170a66ac0fcSDelphine CC Chiu         if (obj.find("Targets") != obj.end())
171a66ac0fcSDelphine CC Chiu         {
172a66ac0fcSDelphine CC Chiu             obj.at("Targets").get_to(targets);
173a66ac0fcSDelphine CC Chiu         }
174a66ac0fcSDelphine CC Chiu 
175939a6431SVijay Khemka         /* Create a monitor object and let it do all the rest */
176939a6431SVijay Khemka         gpios.push_back(std::make_unique<phosphor::gpio::GpioMonitor>(
177a66ac0fcSDelphine CC Chiu             line, config, io, target, targets, lineMsg, flag));
178939a6431SVijay Khemka     }
179939a6431SVijay Khemka     io.run();
180939a6431SVijay Khemka 
181939a6431SVijay Khemka     return 0;
182939a6431SVijay Khemka }
183