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 #pragma once 18 #include <phosphor-logging/elog-errors.hpp> 19 #include <unistd.h> 20 #include "xyz/openbmc_project/Chassis/Common/error.hpp" 21 #include "xyz/openbmc_project/Chassis/Buttons/Power/server.hpp" 22 #include "common.hpp" 23 #include "gpio.hpp" 24 25 const static constexpr char* POWER_BUTTON = "POWER_BUTTON"; 26 27 struct PowerButton 28 : sdbusplus::server::object::object< 29 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power> 30 { 31 32 PowerButton(sdbusplus::bus::bus& bus, const char* path, 33 EventPtr& event, 34 sd_event_io_handler_t handler = PowerButton::EventHandler) : 35 sdbusplus::server::object::object< 36 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power>( 37 bus, path), 38 fd(-1), bus(bus), event(event), callbackHandler(handler) 39 { 40 41 int ret = -1; 42 43 // config gpio 44 ret = ::configGpio(POWER_BUTTON, &fd, bus); 45 if (ret < 0) 46 { 47 phosphor::logging::log<phosphor::logging::level::ERR>( 48 "POWER_BUTTON: failed to config GPIO"); 49 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 50 Error::IOError(); 51 } 52 53 ret = sd_event_add_io(event.get(), nullptr, fd, EPOLLPRI, 54 callbackHandler, this); 55 if (ret < 0) 56 { 57 phosphor::logging::log<phosphor::logging::level::ERR>( 58 "POWER_BUTTON: failed to add to event loop"); 59 ::closeGpio(fd); 60 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 61 Error::IOError(); 62 } 63 } 64 65 ~PowerButton() 66 { 67 ::closeGpio(fd); 68 } 69 70 void simPress() override; 71 void simLongPress() override; 72 73 static int EventHandler(sd_event_source* es, int fd, 74 uint32_t revents, void* userdata) 75 { 76 77 int n = -1; 78 char buf = '0'; 79 80 if (!userdata) 81 { 82 phosphor::logging::log<phosphor::logging::level::ERR>( 83 "POWER_BUTTON: userdata null!"); 84 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 85 Error::IOError(); 86 } 87 88 PowerButton* powerButton = static_cast<PowerButton*>(userdata); 89 90 if (!powerButton) 91 { 92 phosphor::logging::log<phosphor::logging::level::ERR>( 93 "POWER_BUTTON: null pointer!"); 94 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 95 Error::IOError(); 96 } 97 98 n = ::lseek(fd, 0, SEEK_SET); 99 100 if (n < 0) 101 { 102 phosphor::logging::log<phosphor::logging::level::ERR>( 103 "POWER_BUTTON: lseek error!"); 104 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 105 Error::IOError(); 106 } 107 108 n = ::read(fd, &buf, sizeof(buf)); 109 if (n < 0) 110 { 111 phosphor::logging::log<phosphor::logging::level::ERR>( 112 "POWER_BUTTON: read error!"); 113 throw sdbusplus::xyz::openbmc_project::Chassis::Common:: 114 Error::IOError(); 115 } 116 117 if (buf == '0') 118 { 119 phosphor::logging::log<phosphor::logging::level::DEBUG>( 120 "POWER_BUTTON: pressed"); 121 // emit pressed signal 122 powerButton->pressed(); 123 } 124 else 125 { 126 phosphor::logging::log<phosphor::logging::level::DEBUG>( 127 "POWER_BUTTON: released"); 128 // released 129 powerButton->released(); 130 } 131 132 return 0; 133 } 134 135 private: 136 int fd; 137 sdbusplus::bus::bus& bus; 138 EventPtr& event; 139 sd_event_io_handler_t callbackHandler; 140 }; 141