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