xref: /openbmc/phosphor-gpio-monitor/gpioMonMain.cpp (revision 39084b4a64eb5288677f23fdde84c0b69003faf5)
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>
22939a6431SVijay Khemka #include <phosphor-logging/log.hpp>
23939a6431SVijay Khemka 
24*39084b4aSPatrick Williams #include <fstream>
25*39084b4aSPatrick Williams 
26939a6431SVijay Khemka using namespace phosphor::logging;
27939a6431SVijay Khemka 
28939a6431SVijay Khemka namespace phosphor
29939a6431SVijay Khemka {
30939a6431SVijay Khemka namespace gpio
31939a6431SVijay Khemka {
32939a6431SVijay Khemka 
33939a6431SVijay Khemka std::map<std::string, int> polarityMap = {
34939a6431SVijay Khemka     /**< Only watch falling edge events. */
35939a6431SVijay Khemka     {"FALLING", GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE},
36939a6431SVijay Khemka     /**< Only watch rising edge events. */
37939a6431SVijay Khemka     {"RISING", GPIOD_LINE_REQUEST_EVENT_RISING_EDGE},
38939a6431SVijay Khemka     /**< Monitor both types of events. */
39939a6431SVijay Khemka     {"BOTH", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES}};
40939a6431SVijay Khemka 
41939a6431SVijay Khemka }
42939a6431SVijay Khemka } // namespace phosphor
43939a6431SVijay Khemka 
44939a6431SVijay Khemka int main(int argc, char** argv)
45939a6431SVijay Khemka {
46854404e0SEd Tanous     boost::asio::io_context io;
47939a6431SVijay Khemka 
48939a6431SVijay Khemka     CLI::App app{"Monitor GPIO line for requested state change"};
49939a6431SVijay Khemka 
50939a6431SVijay Khemka     std::string gpioFileName;
51939a6431SVijay Khemka 
52939a6431SVijay Khemka     /* Add an input option */
53939a6431SVijay Khemka     app.add_option("-c,--config", gpioFileName, "Name of config json file")
54939a6431SVijay Khemka         ->required()
55939a6431SVijay Khemka         ->check(CLI::ExistingFile);
56939a6431SVijay Khemka 
57939a6431SVijay Khemka     /* Parse input parameter */
58939a6431SVijay Khemka     try
59939a6431SVijay Khemka     {
60939a6431SVijay Khemka         app.parse(argc, argv);
61939a6431SVijay Khemka     }
6267554144SPatrick Williams     catch (const CLI::Error& e)
63939a6431SVijay Khemka     {
64939a6431SVijay Khemka         return app.exit(e);
65939a6431SVijay Khemka     }
66939a6431SVijay Khemka 
67939a6431SVijay Khemka     /* Get list of gpio config details from json file */
68939a6431SVijay Khemka     std::ifstream file(gpioFileName);
69939a6431SVijay Khemka     if (!file)
70939a6431SVijay Khemka     {
71939a6431SVijay Khemka         log<level::ERR>("GPIO monitor config file not found",
72939a6431SVijay Khemka                         entry("GPIO_MON_FILE=%s", gpioFileName.c_str()));
73939a6431SVijay Khemka         return -1;
74939a6431SVijay Khemka     }
75939a6431SVijay Khemka 
76939a6431SVijay Khemka     nlohmann::json gpioMonObj;
77939a6431SVijay Khemka     file >> gpioMonObj;
78939a6431SVijay Khemka     file.close();
79939a6431SVijay Khemka 
80939a6431SVijay Khemka     std::vector<std::unique_ptr<phosphor::gpio::GpioMonitor>> gpios;
81939a6431SVijay Khemka 
82939a6431SVijay Khemka     for (auto& obj : gpioMonObj)
83939a6431SVijay Khemka     {
84939a6431SVijay Khemka         /* GPIO Line message */
85939a6431SVijay Khemka         std::string lineMsg = "GPIO Line ";
86939a6431SVijay Khemka 
87939a6431SVijay Khemka         /* GPIO line */
88939a6431SVijay Khemka         gpiod_line* line = NULL;
89939a6431SVijay Khemka 
90939a6431SVijay Khemka         /* Log message string */
91939a6431SVijay Khemka         std::string errMsg;
92939a6431SVijay Khemka 
93939a6431SVijay Khemka         /* GPIO line configuration, default to monitor both edge */
94939a6431SVijay Khemka         struct gpiod_line_request_config config
95939a6431SVijay Khemka         {
96939a6431SVijay Khemka             "gpio_monitor", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES, 0
97939a6431SVijay Khemka         };
98939a6431SVijay Khemka 
99939a6431SVijay Khemka         /* flag to monitor */
100939a6431SVijay Khemka         bool flag = false;
101939a6431SVijay Khemka 
102939a6431SVijay Khemka         /* target to start */
103939a6431SVijay Khemka         std::string target;
104939a6431SVijay Khemka 
105a66ac0fcSDelphine CC Chiu         /* multi targets to start */
106a66ac0fcSDelphine CC Chiu         std::map<std::string, std::vector<std::string>> targets;
107a66ac0fcSDelphine CC Chiu 
108939a6431SVijay Khemka         if (obj.find("LineName") == obj.end())
109939a6431SVijay Khemka         {
110939a6431SVijay Khemka             /* If there is no line Name defined then gpio num nd chip
111939a6431SVijay Khemka              * id must be defined. GpioNum is integer mapping to the
112939a6431SVijay Khemka              * GPIO key configured by the kernel
113939a6431SVijay Khemka              */
114939a6431SVijay Khemka             if (obj.find("GpioNum") == obj.end() ||
115939a6431SVijay Khemka                 obj.find("ChipId") == obj.end())
116939a6431SVijay Khemka             {
117939a6431SVijay Khemka                 log<level::ERR>(
118939a6431SVijay Khemka                     "Failed to find line name or gpio number",
119939a6431SVijay Khemka                     entry("GPIO_JSON_FILE_NAME=%s", gpioFileName.c_str()));
120939a6431SVijay Khemka                 return -1;
121939a6431SVijay Khemka             }
122939a6431SVijay Khemka 
123939a6431SVijay Khemka             std::string chipIdStr = obj["ChipId"];
124939a6431SVijay Khemka             int gpioNum = obj["GpioNum"];
125939a6431SVijay Khemka 
126939a6431SVijay Khemka             lineMsg += std::to_string(gpioNum);
127939a6431SVijay Khemka 
128939a6431SVijay Khemka             /* Get the GPIO line */
129939a6431SVijay Khemka             line = gpiod_line_get(chipIdStr.c_str(), gpioNum);
130939a6431SVijay Khemka         }
131939a6431SVijay Khemka         else
132939a6431SVijay Khemka         {
133939a6431SVijay Khemka             /* Find the GPIO line */
134939a6431SVijay Khemka             std::string lineName = obj["LineName"];
135939a6431SVijay Khemka             lineMsg += lineName;
136939a6431SVijay Khemka             line = gpiod_line_find(lineName.c_str());
137939a6431SVijay Khemka         }
138939a6431SVijay Khemka 
139939a6431SVijay Khemka         if (line == NULL)
140939a6431SVijay Khemka         {
141939a6431SVijay Khemka             errMsg = "Failed to find the " + lineMsg;
142939a6431SVijay Khemka             log<level::ERR>(errMsg.c_str());
143939a6431SVijay Khemka             return -1;
144939a6431SVijay Khemka         }
145939a6431SVijay Khemka 
146939a6431SVijay Khemka         /* Get event to be monitored, if it is not defined then
147939a6431SVijay Khemka          * Both rising falling edge will be monitored.
148939a6431SVijay Khemka          */
149939a6431SVijay Khemka         if (obj.find("EventMon") != obj.end())
150939a6431SVijay Khemka         {
151939a6431SVijay Khemka             std::string eventStr = obj["EventMon"];
152939a6431SVijay Khemka             auto findEvent = phosphor::gpio::polarityMap.find(eventStr);
153939a6431SVijay Khemka             if (findEvent == phosphor::gpio::polarityMap.end())
154939a6431SVijay Khemka             {
155939a6431SVijay Khemka                 errMsg = "Incorrect GPIO monitor event defined " + lineMsg;
156939a6431SVijay Khemka                 log<level::ERR>(errMsg.c_str());
157939a6431SVijay Khemka                 return -1;
158939a6431SVijay Khemka             }
159939a6431SVijay Khemka 
160939a6431SVijay Khemka             config.request_type = findEvent->second;
161939a6431SVijay Khemka         }
162939a6431SVijay Khemka 
163939a6431SVijay Khemka         /* Get flag if monitoring needs to continue after first event */
164939a6431SVijay Khemka         if (obj.find("Continue") != obj.end())
165939a6431SVijay Khemka         {
166939a6431SVijay Khemka             flag = obj["Continue"];
167939a6431SVijay Khemka         }
168939a6431SVijay Khemka 
169939a6431SVijay Khemka         /* Parse out target argument. It is fine if the user does not
170939a6431SVijay Khemka          * pass this if they are not interested in calling into any target
171939a6431SVijay Khemka          * on meeting a condition.
172939a6431SVijay Khemka          */
173939a6431SVijay Khemka         if (obj.find("Target") != obj.end())
174939a6431SVijay Khemka         {
175939a6431SVijay Khemka             target = obj["Target"];
176939a6431SVijay Khemka         }
177939a6431SVijay Khemka 
178a66ac0fcSDelphine CC Chiu         /* Parse out the targets argument if multi-targets are needed.*/
179a66ac0fcSDelphine CC Chiu         if (obj.find("Targets") != obj.end())
180a66ac0fcSDelphine CC Chiu         {
181a66ac0fcSDelphine CC Chiu             obj.at("Targets").get_to(targets);
182a66ac0fcSDelphine CC Chiu         }
183a66ac0fcSDelphine CC Chiu 
184939a6431SVijay Khemka         /* Create a monitor object and let it do all the rest */
185939a6431SVijay Khemka         gpios.push_back(std::make_unique<phosphor::gpio::GpioMonitor>(
186a66ac0fcSDelphine CC Chiu             line, config, io, target, targets, lineMsg, flag));
187939a6431SVijay Khemka     }
188939a6431SVijay Khemka     io.run();
189939a6431SVijay Khemka 
190939a6431SVijay Khemka     return 0;
191939a6431SVijay Khemka }
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