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 <phosphor-logging/elog-errors.hpp> 26 27 const static constexpr char* POWER_BUTTON = "POWER_BUTTON"; 28 29 struct PowerButton 30 : sdbusplus::server::object::object< 31 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power> 32 { 33 34 PowerButton(sdbusplus::bus::bus& bus, const char* path, EventPtr& event, 35 sd_event_io_handler_t handler = PowerButton::EventHandler) : 36 sdbusplus::server::object::object< 37 sdbusplus::xyz::openbmc_project::Chassis::Buttons::server::Power>( 38 bus, path), 39 fd(-1), bus(bus), event(event), callbackHandler(handler) 40 { 41 42 int ret = -1; 43 44 // config gpio 45 ret = ::configGpio(POWER_BUTTON, &fd, bus); 46 if (ret < 0) 47 { 48 phosphor::logging::log<phosphor::logging::level::ERR>( 49 "POWER_BUTTON: failed to config GPIO"); 50 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 51 IOError(); 52 } 53 54 ret = sd_event_add_io(event.get(), nullptr, fd, EPOLLPRI, 55 callbackHandler, this); 56 if (ret < 0) 57 { 58 phosphor::logging::log<phosphor::logging::level::ERR>( 59 "POWER_BUTTON: failed to add to event loop"); 60 ::closeGpio(fd); 61 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 62 IOError(); 63 } 64 } 65 66 ~PowerButton() 67 { 68 ::closeGpio(fd); 69 } 70 71 void simPress() override; 72 void simLongPress() override; 73 74 static const char* getGpioName() 75 { 76 return POWER_BUTTON; 77 } 78 79 static int EventHandler(sd_event_source* es, int fd, uint32_t revents, 80 void* userdata) 81 { 82 83 int n = -1; 84 char buf = '0'; 85 86 if (!userdata) 87 { 88 phosphor::logging::log<phosphor::logging::level::ERR>( 89 "POWER_BUTTON: userdata null!"); 90 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 91 IOError(); 92 } 93 94 PowerButton* powerButton = static_cast<PowerButton*>(userdata); 95 96 if (!powerButton) 97 { 98 phosphor::logging::log<phosphor::logging::level::ERR>( 99 "POWER_BUTTON: null pointer!"); 100 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 101 IOError(); 102 } 103 104 n = ::lseek(fd, 0, SEEK_SET); 105 106 if (n < 0) 107 { 108 phosphor::logging::log<phosphor::logging::level::ERR>( 109 "POWER_BUTTON: lseek error!"); 110 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 111 IOError(); 112 } 113 114 n = ::read(fd, &buf, sizeof(buf)); 115 if (n < 0) 116 { 117 phosphor::logging::log<phosphor::logging::level::ERR>( 118 "POWER_BUTTON: read error!"); 119 throw sdbusplus::xyz::openbmc_project::Chassis::Common::Error:: 120 IOError(); 121 } 122 123 if (buf == '0') 124 { 125 phosphor::logging::log<phosphor::logging::level::DEBUG>( 126 "POWER_BUTTON: pressed"); 127 // emit pressed signal 128 powerButton->pressed(); 129 } 130 else 131 { 132 phosphor::logging::log<phosphor::logging::level::DEBUG>( 133 "POWER_BUTTON: released"); 134 // released 135 powerButton->released(); 136 } 137 138 return 0; 139 } 140 141 private: 142 int fd; 143 sdbusplus::bus::bus& bus; 144 EventPtr& event; 145 sd_event_io_handler_t callbackHandler; 146 }; 147