Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 1 | #include "attn_monitor.hpp" |
| 2 | |
| 3 | #include "attn_handler.hpp" |
| 4 | |
| 5 | #include <phosphor-logging/log.hpp> |
| 6 | |
| 7 | using namespace phosphor::logging; |
| 8 | |
| 9 | namespace attn |
| 10 | { |
| 11 | |
| 12 | /** @brief Register a callback for gpio event */ |
| 13 | void AttnMonitor::scheduleGPIOEvent() |
| 14 | { |
| 15 | std::string logMessage = "[ATTN] ... waiting for events ..."; |
| 16 | log<level::INFO>(logMessage.c_str()); |
| 17 | |
| 18 | // Register async callback, note that callback is a |
| 19 | // lambda function with "this" pointer captured |
| 20 | iv_gpioEventDescriptor.async_wait( |
| 21 | boost::asio::posix::stream_descriptor::wait_read, |
| 22 | [this](const boost::system::error_code& ec) { |
| 23 | if (ec) |
| 24 | { |
| 25 | std::string logMessage = "[ATTN] ATTN GPIO Async error: " + |
| 26 | std::string(ec.message()); |
| 27 | log<level::INFO>(logMessage.c_str()); |
| 28 | } |
| 29 | else |
| 30 | { |
| 31 | handleGPIOEvent(); // gpio trigger detected |
| 32 | } |
| 33 | return; |
| 34 | }); // register async callback |
| 35 | } |
| 36 | |
| 37 | /** @brief Handle the GPIO state change event */ |
| 38 | void AttnMonitor::handleGPIOEvent() |
| 39 | { |
| 40 | gpiod_line_event gpioEvent; |
| 41 | std::string logMessage; |
| 42 | |
| 43 | if (gpiod_line_event_read_fd(iv_gpioEventDescriptor.native_handle(), |
| 44 | &gpioEvent) < 0) |
| 45 | { |
| 46 | logMessage = "[ATTN] ATTN GPIO Failed can't read file descriptor!"; |
| 47 | log<level::INFO>(logMessage.c_str()); |
| 48 | } |
| 49 | else |
| 50 | { |
| 51 | switch (gpiod_line_get_value(iv_gpioLine)) |
| 52 | { |
| 53 | // active attention when gpio == 0 |
| 54 | case 0: |
Ben Tyner | 970fd4f | 2020-02-19 13:46:42 -0600 | [diff] [blame] | 55 | attnHandler(iv_breakpoints); |
Ben Tyner | 73ac368 | 2020-01-09 10:46:47 -0600 | [diff] [blame] | 56 | break; |
| 57 | |
| 58 | // gpio == 1, GPIO handler should not be executing |
| 59 | case 1: |
| 60 | logMessage = "[ATTN] ATTN GPIO sync!"; |
| 61 | log<level::INFO>(logMessage.c_str()); |
| 62 | break; |
| 63 | |
| 64 | // unexpected value |
| 65 | default: |
| 66 | logMessage = "[ATTN] ATTN GPIO read unexpected valuel!"; |
| 67 | log<level::INFO>(logMessage.c_str()); |
| 68 | } |
| 69 | } |
| 70 | scheduleGPIOEvent(); // continue monitoring gpio |
| 71 | } |
| 72 | |
| 73 | /** @brief Request a GPIO line for monitoring attention events */ |
| 74 | void AttnMonitor::requestGPIOEvent() |
| 75 | { |
| 76 | if (0 != gpiod_line_request(iv_gpioLine, &iv_gpioConfig, 0)) |
| 77 | { |
| 78 | std::string logMessage = "[ATTN] failed request for GPIO"; |
| 79 | log<level::INFO>(logMessage.c_str()); |
| 80 | } |
| 81 | else |
| 82 | { |
| 83 | int gpioLineFd; |
| 84 | |
| 85 | gpioLineFd = gpiod_line_event_get_fd(iv_gpioLine); |
| 86 | if (gpioLineFd < 0) |
| 87 | { |
| 88 | std::string logMessage = "[ATTN] failed to get file descriptor"; |
| 89 | log<level::INFO>(logMessage.c_str()); |
| 90 | } |
| 91 | else |
| 92 | { |
| 93 | // Register file descriptor for monitoring |
| 94 | iv_gpioEventDescriptor.assign(gpioLineFd); |
| 95 | |
| 96 | // Start monitoring |
| 97 | scheduleGPIOEvent(); |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | } // namespace attn |