/**
  ******************************************************************************
  * @file    stm32746g_discovery_sdram.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    22-April-2016
  * @brief   This file includes the SDRAM driver for the MT48LC4M32B2B5-7 memory
  *          device mounted on STM32746G-Discovery board.
  @verbatim
   1. How To use this driver:
   --------------------------
      - This driver is used to drive the MT48LC4M32B2B5-7 SDRAM external memory mounted
        on STM32746G-Discovery board.
      - This driver does not need a specific component driver for the SDRAM device
        to be included with.

   2. Driver description:
   ---------------------
     + Initialization steps:
        o Initialize the SDRAM external memory using the BSP_SDRAM_Init() function. This
          function includes the MSP layer hardware resources initialization and the
          FMC controller configuration to interface with the external SDRAM memory.
        o It contains the SDRAM initialization sequence to program the SDRAM external
          device using the function BSP_SDRAM_Initialization_sequence(). Note that this
          sequence is standard for all SDRAM devices, but can include some differences
          from a device to another. If it is the case, the right sequence should be
          implemented separately.

     + SDRAM read/write operations
        o SDRAM external memory can be accessed with read/write operations once it is
          initialized.
          Read/write operation can be performed with AHB access using the functions
          BSP_SDRAM_ReadData()/BSP_SDRAM_WriteData(), or by DMA transfer using the functions
          BSP_SDRAM_ReadData_DMA()/BSP_SDRAM_WriteData_DMA().
        o The AHB access is performed with 32-bit width transaction, the DMA transfer
          configuration is fixed at single (no burst) word transfer (see the
          SDRAM_MspInit() static function).
        o User can implement his own functions for read/write access with his desired
          configurations.
        o If interrupt mode is used for DMA transfer, the function BSP_SDRAM_DMA_IRQHandler()
          is called in IRQ handler file, to serve the generated interrupt once the DMA
          transfer is complete.
        o You can send a command to the SDRAM device in runtime using the function
          BSP_SDRAM_Sendcmd(), and giving the desired command as parameter chosen between
          the predefined commands of the "FMC_SDRAM_CommandTypeDef" structure.

  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "stm32746g_discovery_sdram.h"

/** @addtogroup BSP
  * @{
  */

/** @addtogroup STM32746G_DISCOVERY
  * @{
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM STM32746G_DISCOVERY_SDRAM
  * @{
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Types_Definitions STM32746G_DISCOVERY_SDRAM Private Types Definitions
  * @{
  */
/**
  * @}
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Defines STM32746G_DISCOVERY_SDRAM Private Defines
  * @{
  */
/**
  * @}
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Macros STM32746G_DISCOVERY_SDRAM Private Macros
  * @{
  */
/**
  * @}
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Variables STM32746G_DISCOVERY_SDRAM Private Variables
  * @{
  */
SDRAM_HandleTypeDef sdramHandle;
static FMC_SDRAM_TimingTypeDef Timing;
static FMC_SDRAM_CommandTypeDef Command;
/**
  * @}
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Private_Function_Prototypes STM32746G_DISCOVERY_SDRAM Private Function Prototypes
  * @{
  */
/**
  * @}
  */

/** @defgroup STM32746G_DISCOVERY_SDRAM_Exported_Functions STM32746G_DISCOVERY_SDRAM Exported Functions
  * @{
  */

/**
  * @brief  Initializes the SDRAM device.
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_Init(void)
{
    static uint8_t sdramstatus = SDRAM_ERROR;
    /* SDRAM device configuration */
    sdramHandle.Instance = FMC_SDRAM_DEVICE;

    /* Timing configuration for 100Mhz as SD clock frequency (System clock is up to 200Mhz) */
    Timing.LoadToActiveDelay    = 2;
    Timing.ExitSelfRefreshDelay = 7;
    Timing.SelfRefreshTime      = 4;
    Timing.RowCycleDelay        = 7;
    Timing.WriteRecoveryTime    = 2;
    Timing.RPDelay              = 2;
    Timing.RCDDelay             = 2;

    sdramHandle.Init.SDBank             = FMC_SDRAM_BANK1;
    sdramHandle.Init.ColumnBitsNumber   = FMC_SDRAM_COLUMN_BITS_NUM_8;
    sdramHandle.Init.RowBitsNumber      = FMC_SDRAM_ROW_BITS_NUM_12;
    sdramHandle.Init.MemoryDataWidth    = SDRAM_MEMORY_WIDTH;
    sdramHandle.Init.InternalBankNumber = FMC_SDRAM_INTERN_BANKS_NUM_4;
    sdramHandle.Init.CASLatency         = FMC_SDRAM_CAS_LATENCY_2;
    sdramHandle.Init.WriteProtection    = FMC_SDRAM_WRITE_PROTECTION_DISABLE;
    sdramHandle.Init.SDClockPeriod      = SDCLOCK_PERIOD;
    sdramHandle.Init.ReadBurst          = FMC_SDRAM_RBURST_ENABLE;
    sdramHandle.Init.ReadPipeDelay      = FMC_SDRAM_RPIPE_DELAY_0;

    /* SDRAM controller initialization */

    BSP_SDRAM_MspInit(&sdramHandle, NULL); /* __weak function can be rewritten by the application */

    if(HAL_SDRAM_Init(&sdramHandle, &Timing) != HAL_OK)
    {
        sdramstatus = SDRAM_ERROR;
    }
    else
    {
        sdramstatus = SDRAM_OK;
    }

    /* SDRAM initialization sequence */
    BSP_SDRAM_Initialization_sequence(REFRESH_COUNT);

    return sdramstatus;
}

/**
  * @brief  DeInitializes the SDRAM device.
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_DeInit(void)
{
    static uint8_t sdramstatus = SDRAM_ERROR;
    /* SDRAM device de-initialization */
    sdramHandle.Instance = FMC_SDRAM_DEVICE;

    if(HAL_SDRAM_DeInit(&sdramHandle) != HAL_OK)
    {
        sdramstatus = SDRAM_ERROR;
    }
    else
    {
        sdramstatus = SDRAM_OK;
    }

    /* SDRAM controller de-initialization */
    BSP_SDRAM_MspDeInit(&sdramHandle, NULL);

    return sdramstatus;
}

/**
  * @brief  Programs the SDRAM device.
  * @param  RefreshCount: SDRAM refresh counter value
  * @retval None
  */
void BSP_SDRAM_Initialization_sequence(uint32_t RefreshCount)
{
    __IO uint32_t tmpmrd = 0;

    /* Step 1: Configure a clock configuration enable command */
    Command.CommandMode            = FMC_SDRAM_CMD_CLK_ENABLE;
    Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
    Command.AutoRefreshNumber      = 1;
    Command.ModeRegisterDefinition = 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);

    /* Step 2: Insert 100 us minimum delay */
    /* Inserted delay is equal to 1 ms due to systick time base unit (ms) */
    HAL_Delay(1);

    /* Step 3: Configure a PALL (precharge all) command */
    Command.CommandMode            = FMC_SDRAM_CMD_PALL;
    Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
    Command.AutoRefreshNumber      = 1;
    Command.ModeRegisterDefinition = 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);

    /* Step 4: Configure an Auto Refresh command */
    Command.CommandMode            = FMC_SDRAM_CMD_AUTOREFRESH_MODE;
    Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
    Command.AutoRefreshNumber      = 8;
    Command.ModeRegisterDefinition = 0;

    /* Send the command */
    HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);

    /* Step 5: Program the external memory mode register */
    tmpmrd = (uint32_t)SDRAM_MODEREG_BURST_LENGTH_1          |\
             SDRAM_MODEREG_BURST_TYPE_SEQUENTIAL   |\
             SDRAM_MODEREG_CAS_LATENCY_2           |\
             SDRAM_MODEREG_OPERATING_MODE_STANDARD |\
             SDRAM_MODEREG_WRITEBURST_MODE_SINGLE;

    Command.CommandMode            = FMC_SDRAM_CMD_LOAD_MODE;
    Command.CommandTarget          = FMC_SDRAM_CMD_TARGET_BANK1;
    Command.AutoRefreshNumber      = 1;
    Command.ModeRegisterDefinition = tmpmrd;

    /* Send the command */
    HAL_SDRAM_SendCommand(&sdramHandle, &Command, SDRAM_TIMEOUT);

    /* Step 6: Set the refresh rate counter */
    /* Set the device refresh rate */
    HAL_SDRAM_ProgramRefreshRate(&sdramHandle, RefreshCount);
}

/**
  * @brief  Reads an amount of data from the SDRAM memory in polling mode.
  * @param  uwStartAddress: Read start address
  * @param  pData: Pointer to data to be read
  * @param  uwDataSize: Size of read data from the memory
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_ReadData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
{
    if(HAL_SDRAM_Read_32b(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
    {
        return SDRAM_ERROR;
    }
    else
    {
        return SDRAM_OK;
    }
}

/**
  * @brief  Reads an amount of data from the SDRAM memory in DMA mode.
  * @param  uwStartAddress: Read start address
  * @param  pData: Pointer to data to be read
  * @param  uwDataSize: Size of read data from the memory
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_ReadData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
{
    if(HAL_SDRAM_Read_DMA(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
    {
        return SDRAM_ERROR;
    }
    else
    {
        return SDRAM_OK;
    }
}

/**
  * @brief  Writes an amount of data to the SDRAM memory in polling mode.
  * @param  uwStartAddress: Write start address
  * @param  pData: Pointer to data to be written
  * @param  uwDataSize: Size of written data from the memory
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_WriteData(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
{
    if(HAL_SDRAM_Write_32b(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
    {
        return SDRAM_ERROR;
    }
    else
    {
        return SDRAM_OK;
    }
}

/**
  * @brief  Writes an amount of data to the SDRAM memory in DMA mode.
  * @param  uwStartAddress: Write start address
  * @param  pData: Pointer to data to be written
  * @param  uwDataSize: Size of written data from the memory
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_WriteData_DMA(uint32_t uwStartAddress, uint32_t *pData, uint32_t uwDataSize)
{
    if(HAL_SDRAM_Write_DMA(&sdramHandle, (uint32_t *)uwStartAddress, pData, uwDataSize) != HAL_OK)
    {
        return SDRAM_ERROR;
    }
    else
    {
        return SDRAM_OK;
    }
}

/**
  * @brief  Sends command to the SDRAM bank.
  * @param  SdramCmd: Pointer to SDRAM command structure
  * @retval SDRAM status
  */
uint8_t BSP_SDRAM_Sendcmd(FMC_SDRAM_CommandTypeDef *SdramCmd)
{
    if(HAL_SDRAM_SendCommand(&sdramHandle, SdramCmd, SDRAM_TIMEOUT) != HAL_OK)
    {
        return SDRAM_ERROR;
    }
    else
    {
        return SDRAM_OK;
    }
}

/**
  * @brief  Initializes SDRAM MSP.
  * @param  hsdram: SDRAM handle
  * @param  Params
  * @retval None
  */
__weak void BSP_SDRAM_MspInit(SDRAM_HandleTypeDef  *hsdram, void *Params)
{
    static DMA_HandleTypeDef dma_handle;
    GPIO_InitTypeDef gpio_init_structure;

    /* Enable FMC clock */
    __HAL_RCC_FMC_CLK_ENABLE();

    /* Enable chosen DMAx clock */
    __DMAx_CLK_ENABLE();

    /* Enable GPIOs clock */
    __HAL_RCC_GPIOC_CLK_ENABLE();
    __HAL_RCC_GPIOD_CLK_ENABLE();
    __HAL_RCC_GPIOE_CLK_ENABLE();
    __HAL_RCC_GPIOF_CLK_ENABLE();
    __HAL_RCC_GPIOG_CLK_ENABLE();
    __HAL_RCC_GPIOH_CLK_ENABLE();

    /* Common GPIO configuration */
    gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
    gpio_init_structure.Pull      = GPIO_PULLUP;
    gpio_init_structure.Speed     = GPIO_SPEED_FAST;
    gpio_init_structure.Alternate = GPIO_AF12_FMC;

    /* GPIOC configuration */
    gpio_init_structure.Pin   = GPIO_PIN_3;
    HAL_GPIO_Init(GPIOC, &gpio_init_structure);

    /* GPIOD configuration */
    gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_8 | GPIO_PIN_9 |
                                GPIO_PIN_10 | GPIO_PIN_14 | GPIO_PIN_15;
    HAL_GPIO_Init(GPIOD, &gpio_init_structure);

    /* GPIOE configuration */
    gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_7| GPIO_PIN_8 | GPIO_PIN_9 |\
                                GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 |\
                                GPIO_PIN_15;
    HAL_GPIO_Init(GPIOE, &gpio_init_structure);

    /* GPIOF configuration */
    gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2| GPIO_PIN_3 | GPIO_PIN_4 |\
                                GPIO_PIN_5 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14 |\
                                GPIO_PIN_15;
    HAL_GPIO_Init(GPIOF, &gpio_init_structure);

    /* GPIOG configuration */
    gpio_init_structure.Pin   = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_4| GPIO_PIN_5 | GPIO_PIN_8 |\
                                GPIO_PIN_15;
    HAL_GPIO_Init(GPIOG, &gpio_init_structure);

    /* GPIOH configuration */
    gpio_init_structure.Pin   = GPIO_PIN_3 | GPIO_PIN_5;
    HAL_GPIO_Init(GPIOH, &gpio_init_structure);

    /* Configure common DMA parameters */
    dma_handle.Init.Channel             = SDRAM_DMAx_CHANNEL;
    dma_handle.Init.Direction           = DMA_MEMORY_TO_MEMORY;
    dma_handle.Init.PeriphInc           = DMA_PINC_ENABLE;
    dma_handle.Init.MemInc              = DMA_MINC_ENABLE;
    dma_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
    dma_handle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
    dma_handle.Init.Mode                = DMA_NORMAL;
    dma_handle.Init.Priority            = DMA_PRIORITY_HIGH;
    dma_handle.Init.FIFOMode            = DMA_FIFOMODE_DISABLE;
    dma_handle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
    dma_handle.Init.MemBurst            = DMA_MBURST_SINGLE;
    dma_handle.Init.PeriphBurst         = DMA_PBURST_SINGLE;

    dma_handle.Instance = SDRAM_DMAx_STREAM;

    /* Associate the DMA handle */
    __HAL_LINKDMA(hsdram, hdma, dma_handle);

    /* Deinitialize the stream for new transfer */
    HAL_DMA_DeInit(&dma_handle);

    /* Configure the DMA stream */
    HAL_DMA_Init(&dma_handle);

    /* NVIC configuration for DMA transfer complete interrupt */
    HAL_NVIC_SetPriority(SDRAM_DMAx_IRQn, 0x0F, 0);
    HAL_NVIC_EnableIRQ(SDRAM_DMAx_IRQn);
}

/**
  * @brief  DeInitializes SDRAM MSP.
  * @param  hsdram: SDRAM handle
  * @param  Params
  * @retval None
  */
__weak void BSP_SDRAM_MspDeInit(SDRAM_HandleTypeDef  *hsdram, void *Params)
{
    static DMA_HandleTypeDef dma_handle;

    /* Disable NVIC configuration for DMA interrupt */
    HAL_NVIC_DisableIRQ(SDRAM_DMAx_IRQn);

    /* Deinitialize the stream for new transfer */
    dma_handle.Instance = SDRAM_DMAx_STREAM;
    HAL_DMA_DeInit(&dma_handle);

    /* GPIO pins clock, FMC clock and DMA clock can be shut down in the applications
       by surcharging this __weak function */
}

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
