eive-obsw/linux/spi/SpiComIF.cpp
2021-03-04 18:29:28 +01:00

309 lines
11 KiB
C++

#include "SpiComIF.h"
#include <linux/utility/Utility.h>
#include <linux/spi/SpiCookie.h>
#include <fsfw/ipc/MutexFactory.h>
#include <fsfw/ipc/MutexHelper.h>
#include <fsfw/globalfunctions/arrayprinter.h>
#include <linux/spi/spidev.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <cerrno>
#include <cstring>
SpiComIF::SpiComIF(object_id_t objectId, GpioIF* gpioComIF): SystemObject(objectId),
gpioComIF(gpioComIF) {
if(gpioComIF == nullptr) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::SpiComIF: GPIO communication interface invalid!" << std::endl;
#else
sif::printError("SpiComIF::SpiComIF: GPIO communication interface invalid!\n");
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
}
spiMutex = MutexFactory::instance()->createMutex();
}
ReturnValue_t SpiComIF::initializeInterface(CookieIF *cookie) {
int retval = 0;
SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
if(spiCookie == nullptr) {
return NULLPOINTER;
}
address_t spiAddress = spiCookie->getSpiAddress();
auto iter = spiDeviceMap.find(spiAddress);
if(iter == spiDeviceMap.end()) {
size_t bufferSize = spiCookie->getMaxBufferSize();
SpiInstance spiInstance = {std::vector<uint8_t>(bufferSize)};
auto statusPair = spiDeviceMap.emplace(spiAddress, spiInstance);
if (not statusPair.second) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::initializeInterface: Failed to insert device with address " <<
spiAddress << "to SPI device map" << std::endl;
#else
sif::printError("SpiComIF::initializeInterface: Failed to insert device with address "
"%lu to SPI device map\n", static_cast<unsigned long>(spiAddress));
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
return HasReturnvaluesIF::RETURN_FAILED;
}
/* Now we emplaced the read buffer in the map, we still need to assign that location
to the SPI driver transfer struct */
spiCookie->assignReadBuffer(statusPair.first->second.replyBuffer.data());
}
else {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::error << "SpiComIF::initializeInterface: SPI address already exists!" << std::endl;
#else
sif::printError("SpiComIF::initializeInterface: SPI address already exists!\n");
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
return HasReturnvaluesIF::RETURN_FAILED;
}
/* Pull CS high in any case to be sure that device is inactive */
gpioId_t gpioId = spiCookie->getChipSelectPin();
if(gpioId != gpio::NO_GPIO) {
gpioComIF->pullHigh(gpioId);
}
size_t spiSpeed = 0;
spi::SpiMode spiMode = spi::SpiMode::MODE_0;
SpiCookie::UncommonParameters params;
spiCookie->getSpiParameters(spiMode, spiSpeed, &params);
int fileDescriptor = 0;
utility::UnixFileHelper fileHelper(spiCookie->getSpiDevice(), &fileDescriptor, O_RDWR,
"SpiComIF::initializeInterface: ");
if(fileHelper.getOpenResult() != HasReturnvaluesIF::RETURN_OK) {
return fileHelper.getOpenResult();
}
/* These flags are rather uncommon */
if(params.threeWireSpi or params.noCs or params.csHigh) {
uint32_t currentMode = 0;
retval = ioctl(fileDescriptor, SPI_IOC_RD_MODE32, &currentMode);
if(retval != 0) {
utility::handleIoctlError("SpiComIF::initialiezInterface: Could not read full mode!");
}
if(params.threeWireSpi) {
currentMode |= SPI_3WIRE;
}
if(params.noCs) {
/* Some drivers like the Raspberry Pi ignore this flag in any case */
currentMode |= SPI_NO_CS;
}
if(params.csHigh) {
currentMode |= SPI_CS_HIGH;
}
/* Write adapted mode */
retval = ioctl(fileDescriptor, SPI_IOC_WR_MODE32, &currentMode);
if(retval != 0) {
utility::handleIoctlError("SpiComIF::initialiezInterface: Could not write full mode!");
}
}
if(params.lsbFirst) {
retval = ioctl(fileDescriptor, SPI_IOC_WR_LSB_FIRST, &params.lsbFirst);
if(retval != 0) {
utility::handleIoctlError("SpiComIF::initializeInterface: Setting LSB first failed");
}
}
if(params.bitsPerWord != 8) {
retval = ioctl(fileDescriptor, SPI_IOC_WR_BITS_PER_WORD, &params.bitsPerWord);
if(retval != 0) {
utility::handleIoctlError("SpiComIF::initializeInterface: "
"Could not write bits per word!");
}
}
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t SpiComIF::sendMessage(CookieIF *cookie, const uint8_t *sendData, size_t sendLen) {
SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
int retval = 0;
if(spiCookie == nullptr) {
return NULLPOINTER;
}
if(sendLen > spiCookie->getMaxBufferSize()) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "SpiComIF::sendMessage: Too much data sent, send length" << sendLen <<
"larger than maximum buffer length" << spiCookie->getMaxBufferSize() << std::endl;
#else
sif::printWarning("SpiComIF::sendMessage: Too much data sent, send length %lu larger "
"than maximum buffer length %lu!\n", static_cast<unsigned long>(sendLen),
static_cast<unsigned long>(spiCookie->getMaxBufferSize()));
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
return DeviceCommunicationIF::TOO_MUCH_DATA;
}
/* Prepare transfer */
int fileDescriptor = 0;
std::string device = spiCookie->getSpiDevice();
utility::UnixFileHelper fileHelper(device, &fileDescriptor, O_RDWR,
"SpiComIF::sendMessage: ");
if(fileHelper.getOpenResult() != HasReturnvaluesIF::RETURN_OK) {
return OPENING_FILE_FAILED;
}
spi::SpiMode spiMode = spi::SpiMode::MODE_0;
uint32_t spiSpeed = 0;
spiCookie->getSpiParameters(spiMode, spiSpeed, nullptr);
setSpiSpeedAndMode(fileDescriptor, spiMode, spiSpeed);
spiCookie->assignWriteBuffer(sendData);
spiCookie->assignTransferSize(sendLen);
bool fullDuplex = spiCookie->isFullDuplex();
gpioId_t gpioId = spiCookie->getChipSelectPin();
/* GPIO access is mutex protected */
MutexHelper(spiMutex, timeoutType, timeoutMs);
/* Pull SPI CS low. For now, no support for active high given */
if(gpioId != gpio::NO_GPIO) {
gpioComIF->pullLow(gpioId);
}
/* Execute transfer */
if(fullDuplex) {
/* Initiate a full duplex SPI transfer. */
retval = ioctl(fileDescriptor, SPI_IOC_MESSAGE(1), spiCookie->getTransferStructHandle());
if(retval < 0) {
utility::handleIoctlError("SpiComIF::sendMessage: ioctl error.");
result = FULL_DUPLEX_TRANSFER_FAILED;
}
}
else {
/* We write with a blocking half-duplex transfer here */
if (write(fileDescriptor, sendData, sendLen) != static_cast<ssize_t>(sendLen)) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "SpiComIF::sendMessage: Half-Duplex write operation failed!" <<
std::endl;
#else
sif::printWarning("SpiComIF::sendMessage: Half-Duplex write operation failed!\n");
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
result = HALF_DUPLEX_TRANSFER_FAILED;
}
}
if(gpioId != gpio::NO_GPIO) {
gpioComIF->pullHigh(gpioId);
}
return result;
}
ReturnValue_t SpiComIF::getSendSuccess(CookieIF *cookie) {
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t SpiComIF::requestReceiveMessage(CookieIF *cookie, size_t requestLen) {
ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
if(spiCookie == nullptr) {
return NULLPOINTER;
}
bool fullDuplex = spiCookie->isFullDuplex();
if(fullDuplex) {
return HasReturnvaluesIF::RETURN_OK;
}
std::string device = spiCookie->getSpiDevice();
int fileDescriptor = 0;
utility::UnixFileHelper fileHelper(device, &fileDescriptor, O_RDWR,
"SpiComIF::requestReceiveMessage: ");
if(fileHelper.getOpenResult() != HasReturnvaluesIF::RETURN_OK) {
return OPENING_FILE_FAILED;
}
uint8_t* rxBuf = nullptr;
size_t readSize = spiCookie->getCurrentTransferSize();
result = getReadBuffer(spiCookie->getSpiAddress(), &rxBuf);
if(result != HasReturnvaluesIF::RETURN_OK) {
return result;
}
gpioId_t gpioId = spiCookie->getChipSelectPin();
MutexHelper(spiMutex, timeoutType, timeoutMs);
if(gpioId != gpio::NO_GPIO) {
gpioComIF->pullLow(gpioId);
}
if(read(fileDescriptor, rxBuf, readSize) != static_cast<ssize_t>(readSize)) {
#if FSFW_VERBOSE_LEVEL >= 1
#if FSFW_CPP_OSTREAM_ENABLED == 1
sif::warning << "SpiComIF::sendMessage: Half-Duplex read operation failed!" << std::endl;
#else
sif::printWarning("SpiComIF::sendMessage: Half-Duplex read operation failed!\n");
#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
#endif /* FSFW_VERBOSE_LEVEL >= 1 */
result = HALF_DUPLEX_TRANSFER_FAILED;
}
if(gpioId != gpio::NO_GPIO) {
gpioComIF->pullHigh(gpioId);
}
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t SpiComIF::readReceivedMessage(CookieIF *cookie, uint8_t **buffer, size_t *size) {
SpiCookie* spiCookie = dynamic_cast<SpiCookie*>(cookie);
if(spiCookie == nullptr) {
return HasReturnvaluesIF::RETURN_FAILED;
}
uint8_t* rxBuf = nullptr;
ReturnValue_t result = getReadBuffer(spiCookie->getSpiAddress(), &rxBuf);
if(result != HasReturnvaluesIF::RETURN_OK) {
return result;
}
*buffer = rxBuf;
*size = spiCookie->getCurrentTransferSize();
return HasReturnvaluesIF::RETURN_OK;
}
ReturnValue_t SpiComIF::getReadBuffer(address_t spiAddress, uint8_t** buffer) {
if(buffer == nullptr) {
return HasReturnvaluesIF::RETURN_FAILED;
}
auto iter = spiDeviceMap.find(spiAddress);
if(iter == spiDeviceMap.end()) {
return HasReturnvaluesIF::RETURN_FAILED;
}
*buffer = iter->second.replyBuffer.data();
return HasReturnvaluesIF::RETURN_OK;
}
void SpiComIF::setSpiSpeedAndMode(int spiFd, spi::SpiMode mode, uint32_t speed) {
int retval = ioctl(spiFd, SPI_IOC_WR_MODE, reinterpret_cast<uint8_t*>(&mode));
if(retval != 0) {
utility::handleIoctlError("SpiTestClass::performRm3100Test: Setting SPI mode failed!");
}
retval = ioctl(spiFd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if(retval != 0) {
utility::handleIoctlError("SpiTestClass::performRm3100Test: Setting SPI speed failed!");
}
}