| Vijay Khemka | 939a643 | 2019-10-09 17:45:45 -0700 | [diff] [blame^] | 1 | #pragma once |
| 2 | |
| 3 | #include <gpiod.h> |
| 4 | |
| 5 | #include <boost/asio/io_service.hpp> |
| 6 | #include <boost/asio/posix/stream_descriptor.hpp> |
| 7 | |
| 8 | namespace phosphor |
| 9 | { |
| 10 | namespace gpio |
| 11 | { |
| 12 | |
| 13 | /** @class GpioMonitor |
| 14 | * @brief Responsible for catching GPIO state change |
| 15 | * condition and starting systemd targets. |
| 16 | */ |
| 17 | class GpioMonitor |
| 18 | { |
| 19 | public: |
| 20 | GpioMonitor() = delete; |
| 21 | ~GpioMonitor() = default; |
| 22 | GpioMonitor(const GpioMonitor&) = delete; |
| 23 | GpioMonitor& operator=(const GpioMonitor&) = delete; |
| 24 | GpioMonitor(GpioMonitor&&) = delete; |
| 25 | GpioMonitor& operator=(GpioMonitor&&) = delete; |
| 26 | |
| 27 | /** @brief Constructs GpioMonitor object. |
| 28 | * |
| 29 | * @param[in] line - GPIO line from libgpiod |
| 30 | * @param[in] config - configuration of line with event |
| 31 | * @param[in] io - io service |
| 32 | * @param[in] target - systemd unit to be started on GPIO |
| 33 | * value change |
| 34 | * @param[in] lineMsg - GPIO line message to be used for log |
| 35 | * @param[in] continueRun - Whether to continue after event occur |
| 36 | */ |
| 37 | GpioMonitor(gpiod_line* line, gpiod_line_request_config& config, |
| 38 | boost::asio::io_service& io, const std::string& target, |
| 39 | const std::string& lineMsg, bool continueRun) : |
| 40 | gpioLine(line), |
| 41 | gpioConfig(config), gpioEventDescriptor(io), target(target), |
| 42 | gpioLineMsg(lineMsg), continueAfterEvent(continueRun) |
| 43 | { |
| 44 | requestGPIOEvents(); |
| 45 | }; |
| 46 | |
| 47 | private: |
| 48 | /** @brief GPIO line */ |
| 49 | gpiod_line* gpioLine; |
| 50 | |
| 51 | /** @brief GPIO line configuration */ |
| 52 | gpiod_line_request_config gpioConfig; |
| 53 | |
| 54 | /** @brief GPIO event descriptor */ |
| 55 | boost::asio::posix::stream_descriptor gpioEventDescriptor; |
| 56 | |
| 57 | /** @brief Systemd unit to be started when the condition is met */ |
| 58 | const std::string target; |
| 59 | |
| 60 | /** @brief GPIO line name message */ |
| 61 | std::string gpioLineMsg; |
| 62 | |
| 63 | /** @brief If the monitor should continue after event */ |
| 64 | bool continueAfterEvent; |
| 65 | |
| 66 | /** @brief register handler for gpio event |
| 67 | * |
| 68 | * @return - 0 on success and -1 otherwise |
| 69 | */ |
| 70 | int requestGPIOEvents(); |
| 71 | |
| 72 | /** @brief Schedule an event handler for GPIO event to trigger */ |
| 73 | void scheduleEventHandler(); |
| 74 | |
| 75 | /** @brief Handle the GPIO event and starts configured target */ |
| 76 | void gpioEventHandler(); |
| 77 | }; |
| 78 | |
| 79 | } // namespace gpio |
| 80 | } // namespace phosphor |