/**
 * Copyright (c) 2011-2022 Bill Greiman
 * This file is part of the SdFat library for SD memory cards.
 *
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "SdSpiDriver.h"
#if defined(SD_USE_CUSTOM_SPI) && (defined(ESP8266) || defined(ESP32))
#define ESP_UNALIGN_OK 1
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::activate()
{
    m_spi->beginTransaction(m_spiSettings);
}
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::begin(SdSpiConfig spiConfig)
{
    if (spiConfig.spiPort)
    {
        m_spi = spiConfig.spiPort;
#if defined(SDCARD_SPI) && defined(SDCARD_SS_PIN)
    }
    else if (spiConfig.csPin == SDCARD_SS_PIN)
    {
        m_spi = &SDCARD_SPI;
#endif // defined(SDCARD_SPI) && defined(SDCARD_SS_PIN)
    }
    else
    {
        m_spi = &SPI;
    }
    m_spi->begin();
}
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::deactivate()
{
    m_spi->endTransaction();
}
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::end()
{
    m_spi->end();
}
//------------------------------------------------------------------------------
uint8_t SdSpiArduinoDriver::receive()
{
    return m_spi->transfer(0XFF);
}
//------------------------------------------------------------------------------
uint8_t SdSpiArduinoDriver::receive(uint8_t *buf, size_t count)
{
#if ESP_UNALIGN_OK
    m_spi->transferBytes(nullptr, buf, count);
#else  // ESP_UNALIGN_OK
    // Adjust to 32-bit alignment.
    while ((reinterpret_cast<uintptr_t>(buf) & 0X3) && count)
    {
        *buf++ = m_spi->transfer(0xff);
        count--;
    }
    // Do multiple of four byte transfers.
    size_t n4 = 4 * (count / 4);
    if (n4)
    {
        m_spi->transferBytes(nullptr, buf, n4);
    }
    // Transfer up to three remaining bytes.
    for (buf += n4, count -= n4; count; count--)
    {
        *buf++ = m_spi->transfer(0xff);
    }
#endif // ESP_UNALIGN_OK
    return 0;
}
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::send(uint8_t data)
{
    m_spi->transfer(data);
}
//------------------------------------------------------------------------------
void SdSpiArduinoDriver::send(const uint8_t *buf, size_t count)
{
#if !ESP_UNALIGN_OK
    // Adjust to 32-bit alignment.
    while ((reinterpret_cast<uintptr_t>(buf) & 0X3) && count)
    {
        SPI.transfer(*buf++);
        count--;
    }
#endif // #if ESP_UNALIGN_OK

    m_spi->transferBytes(const_cast<uint8_t *>(buf), nullptr, count);
}
#endif // defined(SD_USE_CUSTOM_SPI) && (defined(ESP8266) || defined(ESP32))
