1 /* 2 // Copyright (c) 2018 Intel 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 17 #include "button_factory.hpp" 18 #include "gpio.hpp" 19 20 #include <nlohmann/json.hpp> 21 #include <phosphor-logging/elog-errors.hpp> 22 #include <phosphor-logging/lg2.hpp> 23 24 #include <fstream> 25 static constexpr auto gpioDefFile = "/etc/default/obmc/gpio/gpio_defs.json"; 26 27 nlohmann::json gpioDefs; 28 29 int main(void) 30 { 31 int ret = 0; 32 33 lg2::info("Start Phosphor buttons service..."); 34 35 sd_event* event = nullptr; 36 ret = sd_event_default(&event); 37 if (ret < 0) 38 { 39 lg2::error("Error creating a default sd_event handler"); 40 return ret; 41 } 42 EventPtr eventP{event}; 43 event = nullptr; 44 45 sdbusplus::bus_t bus = sdbusplus::bus::new_default(); 46 sdbusplus::server::manager_t objManager{ 47 bus, "/xyz/openbmc_project/Chassis/Buttons"}; 48 49 bus.request_name("xyz.openbmc_project.Chassis.Buttons"); 50 std::vector<std::unique_ptr<ButtonIface>> buttonInterfaces; 51 52 std::ifstream gpios{gpioDefFile}; 53 auto gpioDefJson = nlohmann::json::parse(gpios, nullptr, true); 54 gpioDefs = gpioDefJson["gpio_definitions"]; 55 56 // load gpio config from gpio defs json file and create button interface 57 // objects based on the button form factor type 58 59 for (const auto& gpioConfig : gpioDefs) 60 { 61 std::string formFactorName = gpioConfig["name"]; 62 buttonConfig buttonCfg; 63 buttonCfg.formFactorName = formFactorName; 64 buttonCfg.extraJsonInfo = gpioConfig; 65 66 /* The folloing code checks if the gpio config read 67 from json file is single gpio config or group gpio config, 68 based on that further data is processed. */ 69 lg2::debug("Found button config : {FORM_FACTOR_NAME}", 70 "FORM_FACTOR_NAME", buttonCfg.formFactorName); 71 if (gpioConfig.contains("group_gpio_config")) 72 { 73 const auto& groupGpio = gpioConfig["group_gpio_config"]; 74 75 for (const auto& config : groupGpio) 76 { 77 gpioInfo gpioCfg; 78 gpioCfg.number = getGpioNum(config["pin"]); 79 gpioCfg.direction = config["direction"]; 80 gpioCfg.name = config["name"]; 81 gpioCfg.polarity = (config["polarity"] == "active_high") 82 ? GpioPolarity::activeHigh 83 : GpioPolarity::activeLow; 84 buttonCfg.gpios.push_back(gpioCfg); 85 } 86 } 87 else 88 { 89 gpioInfo gpioCfg; 90 gpioCfg.number = getGpioNum(gpioConfig["pin"]); 91 gpioCfg.direction = gpioConfig["direction"]; 92 buttonCfg.gpios.push_back(gpioCfg); 93 } 94 auto tempButtonIf = ButtonFactory::instance().createInstance( 95 formFactorName, bus, eventP, buttonCfg); 96 /* There are additional gpio configs present in some platforms 97 that are not supported in phosphor-buttons. 98 But they may be used by other applications. so skipping such configs 99 if present in gpio_defs.json file*/ 100 if (tempButtonIf) 101 { 102 buttonInterfaces.emplace_back(std::move(tempButtonIf)); 103 } 104 } 105 106 try 107 { 108 bus.attach_event(eventP.get(), SD_EVENT_PRIORITY_NORMAL); 109 ret = sd_event_loop(eventP.get()); 110 if (ret < 0) 111 { 112 lg2::error("Error occurred during the sd_event_loop : {RESULT}", 113 "RESULT", ret); 114 } 115 } 116 catch (const std::exception& e) 117 { 118 phosphor::logging::log<phosphor::logging::level::ERR>(e.what()); 119 ret = -1; 120 } 121 return ret; 122 } 123