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/*
// Copyright (c) 2019 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#pragma once
#include <stdio.h>
#include <cstring>
#include <experimental/filesystem>
namespace intel
{
namespace pfr
{
/** @class SPIDev
* @brief Responsible for handling file pointer
*/
class SPIDev
{
private:
/** @brief handler for operating on file */
int fd = -1;
public:
SPIDev() = delete;
SPIDev(const SPIDev&) = delete;
SPIDev& operator=(const SPIDev&) = delete;
SPIDev(SPIDev&&) = delete;
SPIDev& operator=(SPIDev&&) = delete;
/** @brief Opens spi(mtd) device file
*
* @param[in] devNo - MTD device number
*/
SPIDev(const std::string& spiDev) :
fd(open(spiDev.c_str(), O_RDWR | O_CLOEXEC))
{
if (fd < 0)
{
std::string msg = "Unable to open mtd device. errno=" +
std::string(std::strerror(errno));
throw std::runtime_error(msg);
}
}
/** @brief Reads the byte data from SPI(MTD) device
*
* @param[in] startAddr - start address
* @param[in] dataLen - No of byte to read
* @param[out] dataRes - Out data pointer
*/
void spiReadData(const uint32_t startAddr, const size_t dataLen,
void* dataRes)
{
if (lseek(fd, startAddr, SEEK_SET) < 0)
{
std::string msg = "Failed to do lseek on mtd device. errno=" +
std::string(std::strerror(errno));
throw std::runtime_error(msg);
}
if (read(fd, dataRes, dataLen) != dataLen)
{
std::string msg = "Failed to read on mtd device. errno=" +
std::string(std::strerror(errno));
throw std::runtime_error(msg);
}
return;
}
virtual ~SPIDev()
{
if (!(fd < 0))
{
close(fd);
}
}
};
} // namespace pfr
} // namespace intel
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