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 "common.hpp" 19 #include "gpio.hpp" 20 #include "xyz/openbmc_project/Chassis/Buttons/Power/server.hpp" 21 #include "xyz/openbmc_project/Chassis/Common/error.hpp" 22 23 #include <unistd.h> 24 25 #include <chrono> 26 #include <phosphor-logging/elog-errors.hpp> 27 28 const static constexpr char* POWER_BUTTON = "POWER_BUTTON"; 29 30 struct PowerButton 31 : sdbusplus::server::object::object< 32 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power> 33 { 34 35 PowerButton(sdbusplus::bus::bus& bus, const char* path, EventPtr& event, 36 buttonConfig& buttonCfg, 37 sd_event_io_handler_t handler = PowerButton::EventHandler) : 38 sdbusplus::server::object::object< 39 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power>( 40 bus, path), 41 fd(-1), buttonIFConfig(buttonCfg), bus(bus), event(event), 42 callbackHandler(handler) 43 { 44 45 int ret = -1; 46 47 // config group gpio based on the gpio defs read from the json file 48 ret = configGroupGpio(bus, buttonIFConfig); 49 50 if (ret < 0) 51 { 52 phosphor::logging::log<phosphor::logging::level::ERR>( 53 "POWER_BUTTON: failed to config GPIO"); 54 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 55 IOError(); 56 } 57 58 // initialize the button io fd from the buttonConfig 59 // which has fd stored when configGroupGpio is called 60 fd = buttonIFConfig.gpios[0].fd; 61 62 char buf; 63 ::read(fd, &buf, sizeof(buf)); 64 65 ret = sd_event_add_io(event.get(), nullptr, fd, EPOLLPRI, 66 callbackHandler, this); 67 if (ret < 0) 68 { 69 phosphor::logging::log<phosphor::logging::level::ERR>( 70 "POWER_BUTTON: failed to add to event loop"); 71 ::closeGpio(fd); 72 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 73 IOError(); 74 } 75 } 76 77 ~PowerButton() 78 { 79 ::closeGpio(fd); 80 } 81 82 void simPress() override; 83 void simLongPress() override; 84 85 static const std::string getGpioName() 86 { 87 return POWER_BUTTON; 88 } 89 90 void updatePressedTime() 91 { 92 pressedTime = std::chrono::steady_clock::now(); 93 } 94 95 auto getPressTime() const 96 { 97 return pressedTime; 98 } 99 100 static int EventHandler(sd_event_source* es, int fd, uint32_t revents, 101 void* userdata) 102 { 103 104 int n = -1; 105 char buf = '0'; 106 107 if (!userdata) 108 { 109 phosphor::logging::log<phosphor::logging::level::ERR>( 110 "POWER_BUTTON: userdata null!"); 111 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 112 IOError(); 113 } 114 115 PowerButton* powerButton = static_cast<PowerButton*>(userdata); 116 117 if (!powerButton) 118 { 119 phosphor::logging::log<phosphor::logging::level::ERR>( 120 "POWER_BUTTON: null pointer!"); 121 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 122 IOError(); 123 } 124 125 n = ::lseek(fd, 0, SEEK_SET); 126 127 if (n < 0) 128 { 129 phosphor::logging::log<phosphor::logging::level::ERR>( 130 "POWER_BUTTON: lseek error!"); 131 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 132 IOError(); 133 } 134 135 n = ::read(fd, &buf, sizeof(buf)); 136 if (n < 0) 137 { 138 phosphor::logging::log<phosphor::logging::level::ERR>( 139 "POWER_BUTTON: read error!"); 140 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 141 IOError(); 142 } 143 144 if (buf == '0') 145 { 146 phosphor::logging::log<phosphor::logging::level::DEBUG>( 147 "POWER_BUTTON: pressed"); 148 149 powerButton->updatePressedTime(); 150 // emit pressed signal 151 powerButton->pressed(); 152 } 153 else 154 { 155 phosphor::logging::log<phosphor::logging::level::DEBUG>( 156 "POWER_BUTTON: released"); 157 158 auto now = std::chrono::steady_clock::now(); 159 auto d = std::chrono::duration_cast<std::chrono::milliseconds>( 160 now - powerButton->getPressTime()); 161 162 if (d > std::chrono::milliseconds(LONG_PRESS_TIME_MS)) 163 { 164 powerButton->pressedLong(); 165 } 166 else 167 { 168 // released 169 powerButton->released(); 170 } 171 } 172 173 return 0; 174 } 175 176 private: 177 int fd; 178 buttonConfig buttonIFConfig; // button iface io details 179 sdbusplus::bus::bus& bus; 180 EventPtr& event; 181 sd_event_io_handler_t callbackHandler; 182 decltype(std::chrono::steady_clock::now()) pressedTime; 183 }; 184