296 lines
10 KiB
C++
296 lines
10 KiB
C++
#include "LinuxLibgpioIF.h"
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#include <fsfw/serviceinterface/ServiceInterface.h>
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#include <gpiod.h>
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#include <linux/gpio/gpioDefinitions.h>
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#include <unistd.h>
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#include <utility>
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#include "GpioCookie.h"
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LinuxLibgpioIF::LinuxLibgpioIF(object_id_t objectId) : SystemObject(objectId) {
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struct gpiod_chip* chip = gpiod_chip_open_by_label("/amba_pl/gpio@42030000");
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sif::debug << chip->name << std::endl;
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}
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LinuxLibgpioIF::~LinuxLibgpioIF() {}
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ReturnValue_t LinuxLibgpioIF::addGpios(GpioCookie* gpioCookie) {
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ReturnValue_t result;
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if (gpioCookie == nullptr) {
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sif::error << "LinuxLibgpioIF::initialize: Invalid cookie" << std::endl;
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return RETURN_FAILED;
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}
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GpioMap mapToAdd = gpioCookie->getGpioMap();
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/* Check whether this ID already exists in the map and remove duplicates */
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result = checkForConflicts(mapToAdd);
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if (result != RETURN_OK) {
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return result;
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}
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result = configureGpios(mapToAdd);
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if (result != RETURN_OK) {
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return RETURN_FAILED;
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}
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/* Register new GPIOs in gpioMap */
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gpioMap.insert(mapToAdd.begin(), mapToAdd.end());
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::configureGpios(GpioMap& mapToAdd) {
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for (auto& gpioConfig : mapToAdd) {
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switch (gpioConfig.second->gpioType) {
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case (gpio::GpioTypes::NONE): {
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return GPIO_INVALID_INSTANCE;
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}
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case (gpio::GpioTypes::GPIOD_REGULAR): {
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GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
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if (regularGpio == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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configureRegularGpio(gpioConfig.first, regularGpio);
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break;
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}
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case (gpio::GpioTypes::CALLBACK): {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioConfig.second);
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if (gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioConfig.first, gpio::GpioOperation::WRITE,
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gpioCallback->initValue, gpioCallback->callbackArgs);
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}
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}
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::configureRegularGpio(gpioId_t gpioId, GpiodRegular* regularGpio) {
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std::string chipname;
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unsigned int lineNum;
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struct gpiod_chip* chip;
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gpio::Direction direction;
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std::string consumer;
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struct gpiod_line* lineHandle;
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int result = 0;
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chipname = regularGpio->chipname;
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chip = gpiod_chip_open_by_name(chipname.c_str());
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if (!chip) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to open chip " << chipname
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<< ". Gpio ID: " << gpioId << std::endl;
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return RETURN_FAILED;
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}
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lineNum = regularGpio->lineNum;
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lineHandle = gpiod_chip_get_line(chip, lineNum);
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if (!lineHandle) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to open line for GPIO with id " << gpioId
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<< std::endl;
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gpiod_chip_close(chip);
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return RETURN_FAILED;
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}
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direction = regularGpio->direction;
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consumer = regularGpio->consumer;
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/* Configure direction and add a description to the GPIO */
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switch (direction) {
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case (gpio::OUT): {
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result = gpiod_line_request_output(lineHandle, consumer.c_str(), regularGpio->initValue);
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if (result < 0) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line " << lineNum
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<< " from GPIO instance with ID: " << gpioId << std::endl;
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gpiod_line_release(lineHandle);
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return RETURN_FAILED;
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}
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break;
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}
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case (gpio::IN): {
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result = gpiod_line_request_input(lineHandle, consumer.c_str());
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if (result < 0) {
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sif::error << "LinuxLibgpioIF::configureGpios: Failed to request line " << lineNum
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<< " from GPIO instance with ID: " << gpioId << std::endl;
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gpiod_line_release(lineHandle);
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return RETURN_FAILED;
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}
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break;
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}
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default: {
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sif::error << "LinuxLibgpioIF::configureGpios: Invalid direction specified" << std::endl;
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return GPIO_INVALID_INSTANCE;
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}
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}
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/**
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* Write line handle to GPIO configuration instance so it can later be used to set or
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* read states of GPIOs.
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*/
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regularGpio->lineHandle = lineHandle;
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::pullHigh(gpioId_t gpioId) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if (gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 1);
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} else {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
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if (gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE, 1,
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gpioCallback->callbackArgs);
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}
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return GPIO_TYPE_FAILURE;
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}
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ReturnValue_t LinuxLibgpioIF::pullLow(gpioId_t gpioId) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if (gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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return driveGpio(gpioId, dynamic_cast<GpiodRegular*>(gpioMapIter->second), 0);
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} else {
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auto gpioCallback = dynamic_cast<GpioCallback*>(gpioMapIter->second);
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if (gpioCallback->callback == nullptr) {
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return GPIO_INVALID_INSTANCE;
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}
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gpioCallback->callback(gpioMapIter->first, gpio::GpioOperation::WRITE, 0,
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gpioCallback->callbackArgs);
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}
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return GPIO_TYPE_FAILURE;
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}
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ReturnValue_t LinuxLibgpioIF::driveGpio(gpioId_t gpioId, GpiodRegular* regularGpio,
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unsigned int logicLevel) {
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if (regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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int result = gpiod_line_set_value(regularGpio->lineHandle, logicLevel);
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if (result < 0) {
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sif::warning << "LinuxLibgpioIF::driveGpio: Failed to pull GPIO with ID " << gpioId
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<< " to logic level " << logicLevel << std::endl;
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return DRIVE_GPIO_FAILURE;
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::readGpio(gpioId_t gpioId, int* gpioState) {
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gpioMapIter = gpioMap.find(gpioId);
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if (gpioMapIter == gpioMap.end()) {
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sif::warning << "LinuxLibgpioIF::readGpio: Unknown GPIOD ID " << gpioId << std::endl;
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return UNKNOWN_GPIO_ID;
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}
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if (gpioMapIter->second->gpioType == gpio::GpioTypes::GPIOD_REGULAR) {
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GpiodRegular* regularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
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if (regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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*gpioState = gpiod_line_get_value(regularGpio->lineHandle);
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} else {
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}
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return RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflicts(GpioMap& mapToAdd) {
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ReturnValue_t status = HasReturnvaluesIF::RETURN_OK;
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ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
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for (auto& gpioConfig : mapToAdd) {
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switch (gpioConfig.second->gpioType) {
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case (gpio::GpioTypes::GPIOD_REGULAR): {
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auto regularGpio = dynamic_cast<GpiodRegular*>(gpioConfig.second);
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if (regularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Check for conflicts and remove duplicates if necessary */
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result = checkForConflictsRegularGpio(gpioConfig.first, regularGpio, mapToAdd);
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if (result != HasReturnvaluesIF::RETURN_OK) {
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status = result;
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}
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break;
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}
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case (gpio::GpioTypes::CALLBACK): {
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auto callbackGpio = dynamic_cast<GpioCallback*>(gpioConfig.second);
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if (callbackGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Check for conflicts and remove duplicates if necessary */
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result = checkForConflictsCallbackGpio(gpioConfig.first, callbackGpio, mapToAdd);
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if (result != HasReturnvaluesIF::RETURN_OK) {
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status = result;
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}
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break;
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}
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default: {
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}
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}
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}
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return status;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflictsRegularGpio(gpioId_t gpioIdToCheck,
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GpiodRegular* gpioToCheck,
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GpioMap& mapToAdd) {
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/* Cross check with private map */
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gpioMapIter = gpioMap.find(gpioIdToCheck);
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if (gpioMapIter != gpioMap.end()) {
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if (gpioMapIter->second->gpioType != gpio::GpioTypes::GPIOD_REGULAR) {
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sif::warning << "LinuxLibgpioIF::checkForConflicts: ID already exists for different "
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"GPIO type"
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<< gpioIdToCheck << ". Removing duplicate." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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return HasReturnvaluesIF::RETURN_OK;
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}
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auto ownRegularGpio = dynamic_cast<GpiodRegular*>(gpioMapIter->second);
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if (ownRegularGpio == nullptr) {
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return GPIO_TYPE_FAILURE;
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}
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/* Remove element from map to add because a entry for this GPIO
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already exists */
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sif::warning << "LinuxLibgpioIF::checkForConflictsRegularGpio: Duplicate GPIO definition"
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<< " detected. Duplicate will be removed from map to add." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t LinuxLibgpioIF::checkForConflictsCallbackGpio(gpioId_t gpioIdToCheck,
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GpioCallback* callbackGpio,
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GpioMap& mapToAdd) {
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/* Cross check with private map */
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gpioMapIter = gpioMap.find(gpioIdToCheck);
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if (gpioMapIter != gpioMap.end()) {
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if (gpioMapIter->second->gpioType != gpio::GpioTypes::CALLBACK) {
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sif::warning << "LinuxLibgpioIF::checkForConflicts: ID already exists for different "
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"GPIO type"
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<< gpioIdToCheck << ". Removing duplicate." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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return HasReturnvaluesIF::RETURN_OK;
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}
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/* Remove element from map to add because a entry for this GPIO
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already exists */
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sif::warning << "LinuxLibgpioIF::checkForConflictsRegularGpio: Duplicate GPIO definition"
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<< " detected. Duplicate will be removed from map to add." << std::endl;
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mapToAdd.erase(gpioIdToCheck);
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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