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 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 */ 86*cf33c593SJayanth Othayoth gpiod_line* line = nullptr; 87939a6431SVijay Khemka 88939a6431SVijay Khemka /* GPIO line configuration, default to monitor both edge */ 89939a6431SVijay Khemka struct gpiod_line_request_config config 90939a6431SVijay Khemka { 91939a6431SVijay Khemka "gpio_monitor", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES, 0 92939a6431SVijay Khemka }; 93939a6431SVijay Khemka 94939a6431SVijay Khemka /* flag to monitor */ 95939a6431SVijay Khemka bool flag = false; 96939a6431SVijay Khemka 97939a6431SVijay Khemka /* target to start */ 98939a6431SVijay Khemka std::string target; 99939a6431SVijay Khemka 100a66ac0fcSDelphine CC Chiu /* multi targets to start */ 101a66ac0fcSDelphine CC Chiu std::map<std::string, std::vector<std::string>> targets; 102a66ac0fcSDelphine CC Chiu 103939a6431SVijay Khemka if (obj.find("LineName") == obj.end()) 104939a6431SVijay Khemka { 105939a6431SVijay Khemka /* If there is no line Name defined then gpio num nd chip 106939a6431SVijay Khemka * id must be defined. GpioNum is integer mapping to the 107939a6431SVijay Khemka * GPIO key configured by the kernel 108939a6431SVijay Khemka */ 109939a6431SVijay Khemka if (obj.find("GpioNum") == obj.end() || 110939a6431SVijay Khemka obj.find("ChipId") == obj.end()) 111939a6431SVijay Khemka { 1122a8848c6SGeorge Liu lg2::error("Failed to find line name or gpio number: {FILE}", 1132a8848c6SGeorge Liu "FILE", gpioFileName); 114939a6431SVijay Khemka return -1; 115939a6431SVijay Khemka } 116939a6431SVijay Khemka 117939a6431SVijay Khemka std::string chipIdStr = obj["ChipId"]; 118939a6431SVijay Khemka int gpioNum = obj["GpioNum"]; 119939a6431SVijay Khemka 120939a6431SVijay Khemka lineMsg += std::to_string(gpioNum); 121939a6431SVijay Khemka 122939a6431SVijay Khemka /* Get the GPIO line */ 123939a6431SVijay Khemka line = gpiod_line_get(chipIdStr.c_str(), gpioNum); 124939a6431SVijay Khemka } 125939a6431SVijay Khemka else 126939a6431SVijay Khemka { 127939a6431SVijay Khemka /* Find the GPIO line */ 128939a6431SVijay Khemka std::string lineName = obj["LineName"]; 129939a6431SVijay Khemka lineMsg += lineName; 130939a6431SVijay Khemka line = gpiod_line_find(lineName.c_str()); 131939a6431SVijay Khemka } 132939a6431SVijay Khemka 133*cf33c593SJayanth Othayoth if (line == nullptr) 134939a6431SVijay Khemka { 13538cd74c8SYang Chen lg2::error("Failed to find the {GPIO}", "GPIO", lineMsg); 13638cd74c8SYang Chen continue; 137939a6431SVijay Khemka } 138939a6431SVijay Khemka 139939a6431SVijay Khemka /* Get event to be monitored, if it is not defined then 140939a6431SVijay Khemka * Both rising falling edge will be monitored. 141939a6431SVijay Khemka */ 142939a6431SVijay Khemka if (obj.find("EventMon") != obj.end()) 143939a6431SVijay Khemka { 144939a6431SVijay Khemka std::string eventStr = obj["EventMon"]; 145939a6431SVijay Khemka auto findEvent = phosphor::gpio::polarityMap.find(eventStr); 146939a6431SVijay Khemka if (findEvent == phosphor::gpio::polarityMap.end()) 147939a6431SVijay Khemka { 1482a8848c6SGeorge Liu lg2::error("{GPIO}: event missing: {EVENT}", "GPIO", lineMsg, 1492a8848c6SGeorge Liu "EVENT", eventStr); 150939a6431SVijay Khemka return -1; 151939a6431SVijay Khemka } 152939a6431SVijay Khemka 153939a6431SVijay Khemka config.request_type = findEvent->second; 154939a6431SVijay Khemka } 155939a6431SVijay Khemka 156939a6431SVijay Khemka /* Get flag if monitoring needs to continue after first event */ 157939a6431SVijay Khemka if (obj.find("Continue") != obj.end()) 158939a6431SVijay Khemka { 159939a6431SVijay Khemka flag = obj["Continue"]; 160939a6431SVijay Khemka } 161939a6431SVijay Khemka 162939a6431SVijay Khemka /* Parse out target argument. It is fine if the user does not 163939a6431SVijay Khemka * pass this if they are not interested in calling into any target 164939a6431SVijay Khemka * on meeting a condition. 165939a6431SVijay Khemka */ 166939a6431SVijay Khemka if (obj.find("Target") != obj.end()) 167939a6431SVijay Khemka { 168939a6431SVijay Khemka target = obj["Target"]; 169939a6431SVijay Khemka } 170939a6431SVijay Khemka 171a66ac0fcSDelphine CC Chiu /* Parse out the targets argument if multi-targets are needed.*/ 172a66ac0fcSDelphine CC Chiu if (obj.find("Targets") != obj.end()) 173a66ac0fcSDelphine CC Chiu { 174a66ac0fcSDelphine CC Chiu obj.at("Targets").get_to(targets); 175a66ac0fcSDelphine CC Chiu } 176a66ac0fcSDelphine CC Chiu 177939a6431SVijay Khemka /* Create a monitor object and let it do all the rest */ 178939a6431SVijay Khemka gpios.push_back(std::make_unique<phosphor::gpio::GpioMonitor>( 179a66ac0fcSDelphine CC Chiu line, config, io, target, targets, lineMsg, flag)); 180939a6431SVijay Khemka } 181939a6431SVijay Khemka io.run(); 182939a6431SVijay Khemka 183939a6431SVijay Khemka return 0; 184939a6431SVijay Khemka } 185