eive-obsw/archive/gpio/LinuxLibgpioIF.cpp
Robin Mueller b71ea7c4c7
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2022-03-04 15:00:14 +01:00

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