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> 20*854404e0SEd Tanous #include <boost/asio/io_context.hpp> 21939a6431SVijay Khemka #include <fstream> 22939a6431SVijay Khemka #include <nlohmann/json.hpp> 23939a6431SVijay Khemka #include <phosphor-logging/log.hpp> 24939a6431SVijay Khemka 25939a6431SVijay Khemka using namespace phosphor::logging; 26939a6431SVijay Khemka 27939a6431SVijay Khemka namespace phosphor 28939a6431SVijay Khemka { 29939a6431SVijay Khemka namespace gpio 30939a6431SVijay Khemka { 31939a6431SVijay Khemka 32939a6431SVijay Khemka std::map<std::string, int> polarityMap = { 33939a6431SVijay Khemka /**< Only watch falling edge events. */ 34939a6431SVijay Khemka {"FALLING", GPIOD_LINE_REQUEST_EVENT_FALLING_EDGE}, 35939a6431SVijay Khemka /**< Only watch rising edge events. */ 36939a6431SVijay Khemka {"RISING", GPIOD_LINE_REQUEST_EVENT_RISING_EDGE}, 37939a6431SVijay Khemka /**< Monitor both types of events. */ 38939a6431SVijay Khemka {"BOTH", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES}}; 39939a6431SVijay Khemka 40939a6431SVijay Khemka } 41939a6431SVijay Khemka } // namespace phosphor 42939a6431SVijay Khemka 43939a6431SVijay Khemka int main(int argc, char** argv) 44939a6431SVijay Khemka { 45939a6431SVijay Khemka 46*854404e0SEd 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 85939a6431SVijay Khemka /* GPIO Line message */ 86939a6431SVijay Khemka std::string lineMsg = "GPIO Line "; 87939a6431SVijay Khemka 88939a6431SVijay Khemka /* GPIO line */ 89939a6431SVijay Khemka gpiod_line* line = NULL; 90939a6431SVijay Khemka 91939a6431SVijay Khemka /* Log message string */ 92939a6431SVijay Khemka std::string errMsg; 93939a6431SVijay Khemka 94939a6431SVijay Khemka /* GPIO line configuration, default to monitor both edge */ 95939a6431SVijay Khemka struct gpiod_line_request_config config 96939a6431SVijay Khemka { 97939a6431SVijay Khemka "gpio_monitor", GPIOD_LINE_REQUEST_EVENT_BOTH_EDGES, 0 98939a6431SVijay Khemka }; 99939a6431SVijay Khemka 100939a6431SVijay Khemka /* flag to monitor */ 101939a6431SVijay Khemka bool flag = false; 102939a6431SVijay Khemka 103939a6431SVijay Khemka /* target to start */ 104939a6431SVijay Khemka std::string target; 105939a6431SVijay Khemka 106939a6431SVijay Khemka if (obj.find("LineName") == obj.end()) 107939a6431SVijay Khemka { 108939a6431SVijay Khemka /* If there is no line Name defined then gpio num nd chip 109939a6431SVijay Khemka * id must be defined. GpioNum is integer mapping to the 110939a6431SVijay Khemka * GPIO key configured by the kernel 111939a6431SVijay Khemka */ 112939a6431SVijay Khemka if (obj.find("GpioNum") == obj.end() || 113939a6431SVijay Khemka obj.find("ChipId") == obj.end()) 114939a6431SVijay Khemka { 115939a6431SVijay Khemka log<level::ERR>( 116939a6431SVijay Khemka "Failed to find line name or gpio number", 117939a6431SVijay Khemka entry("GPIO_JSON_FILE_NAME=%s", gpioFileName.c_str())); 118939a6431SVijay Khemka return -1; 119939a6431SVijay Khemka } 120939a6431SVijay Khemka 121939a6431SVijay Khemka std::string chipIdStr = obj["ChipId"]; 122939a6431SVijay Khemka int gpioNum = obj["GpioNum"]; 123939a6431SVijay Khemka 124939a6431SVijay Khemka lineMsg += std::to_string(gpioNum); 125939a6431SVijay Khemka 126939a6431SVijay Khemka /* Get the GPIO line */ 127939a6431SVijay Khemka line = gpiod_line_get(chipIdStr.c_str(), gpioNum); 128939a6431SVijay Khemka } 129939a6431SVijay Khemka else 130939a6431SVijay Khemka { 131939a6431SVijay Khemka /* Find the GPIO line */ 132939a6431SVijay Khemka std::string lineName = obj["LineName"]; 133939a6431SVijay Khemka lineMsg += lineName; 134939a6431SVijay Khemka line = gpiod_line_find(lineName.c_str()); 135939a6431SVijay Khemka } 136939a6431SVijay Khemka 137939a6431SVijay Khemka if (line == NULL) 138939a6431SVijay Khemka { 139939a6431SVijay Khemka errMsg = "Failed to find the " + lineMsg; 140939a6431SVijay Khemka log<level::ERR>(errMsg.c_str()); 141939a6431SVijay Khemka return -1; 142939a6431SVijay Khemka } 143939a6431SVijay Khemka 144939a6431SVijay Khemka /* Get event to be monitored, if it is not defined then 145939a6431SVijay Khemka * Both rising falling edge will be monitored. 146939a6431SVijay Khemka */ 147939a6431SVijay Khemka if (obj.find("EventMon") != obj.end()) 148939a6431SVijay Khemka { 149939a6431SVijay Khemka std::string eventStr = obj["EventMon"]; 150939a6431SVijay Khemka auto findEvent = phosphor::gpio::polarityMap.find(eventStr); 151939a6431SVijay Khemka if (findEvent == phosphor::gpio::polarityMap.end()) 152939a6431SVijay Khemka { 153939a6431SVijay Khemka errMsg = "Incorrect GPIO monitor event defined " + lineMsg; 154939a6431SVijay Khemka log<level::ERR>(errMsg.c_str()); 155939a6431SVijay Khemka return -1; 156939a6431SVijay Khemka } 157939a6431SVijay Khemka 158939a6431SVijay Khemka config.request_type = findEvent->second; 159939a6431SVijay Khemka } 160939a6431SVijay Khemka 161939a6431SVijay Khemka /* Get flag if monitoring needs to continue after first event */ 162939a6431SVijay Khemka if (obj.find("Continue") != obj.end()) 163939a6431SVijay Khemka { 164939a6431SVijay Khemka flag = obj["Continue"]; 165939a6431SVijay Khemka } 166939a6431SVijay Khemka 167939a6431SVijay Khemka /* Parse out target argument. It is fine if the user does not 168939a6431SVijay Khemka * pass this if they are not interested in calling into any target 169939a6431SVijay Khemka * on meeting a condition. 170939a6431SVijay Khemka */ 171939a6431SVijay Khemka if (obj.find("Target") != obj.end()) 172939a6431SVijay Khemka { 173939a6431SVijay Khemka target = obj["Target"]; 174939a6431SVijay Khemka } 175939a6431SVijay Khemka 176939a6431SVijay Khemka /* Create a monitor object and let it do all the rest */ 177939a6431SVijay Khemka gpios.push_back(std::make_unique<phosphor::gpio::GpioMonitor>( 178939a6431SVijay Khemka line, config, io, target, lineMsg, flag)); 179939a6431SVijay Khemka } 180939a6431SVijay Khemka io.run(); 181939a6431SVijay Khemka 182939a6431SVijay Khemka return 0; 183939a6431SVijay Khemka } 184