/**
  ******************************************************************************
  * @file    STM324x7i_eval.c
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    11-January-2013
  * @brief   This file provides
  *            - set of firmware functions to manage Leds, push-button and COM ports
  *            - low level initialization functions for SD card (on SDIO) and
  *              serial EEPROM (sEE)
  *          available on STM324x7I-EVAL evaluation board(MB786) from
  *          STMicroelectronics.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (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.st.com/software_license_agreement_liberty_v2
  *
  * 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.
  *
  ******************************************************************************
  */ 
  
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_dma.h"
#include "stm32f4xx_exti.h"
#include "stm32f4xx_gpio.h"
#include "stm32f4xx_rcc.h"
#include "stm32f4xx_sdio.h"
//#include "stm32f4xx_syscfg.h"
#include "stm_misc.h"
#include "stm324x7i_eval.h"
//#include "stm32f4xx_i2c.h"

/**
  * @brief  DeInitializes the SDIO interface.
  * @param  None
  * @retval None
  */
void SD_LowLevel_DeInit(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
  
  /*!< Disable SDIO Clock */
  SDIO_ClockCmd(DISABLE);
  
  /*!< Set Power State to OFF */
  SDIO_SetPowerState(SDIO_PowerState_OFF);

  /*!< DeInitializes the SDIO peripheral */
  SDIO_DeInit();
  
  /* Disable the SDIO APB2 Clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, DISABLE);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_MCO);
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_MCO);

  /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PD.02 CMD line */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure PC.12 pin: CLK pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

/* Init just the detect pin.
 * This is so we can save power by not enabling the whole SD card interface,
 * yet still detect when a card is inserted.
 */
void SD_LowLevel_Init_Detect(void) {

  /* Periph clock enable */
  RCC_AHB1PeriphClockCmd(SD_DETECT_GPIO_CLK, ENABLE);

  /*!< Configure SD_SPI_DETECT_PIN pin: SD Card detect pin */
#if defined(PYBOARD3)
  // dpgeorge: PYBv2-v3: switch is normally open, connected to VDD when card inserted
  GPIO_InitTypeDef  GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz; // needs to be 2MHz due to restrictions on PC13
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
#elif defined(PYBOARD4)
  // dpgeorge: PYBv4: switch is normally open, connected to GND when card inserted
  GPIO_InitTypeDef  GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = SD_DETECT_PIN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(SD_DETECT_GPIO_PORT, &GPIO_InitStructure);
#endif
}

/**
  * @brief  Initializes the SD Card and put it into StandBy State (Ready for 
  *         data transfer).
  * @param  None
  * @retval None
  */
void SD_LowLevel_Init(void)
{
  // init the detect pin first
  SD_LowLevel_Init_Detect();

  GPIO_InitTypeDef  GPIO_InitStructure;

  /* GPIOC and GPIOD Periph clock enable */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOD | SD_DETECT_GPIO_CLK, ENABLE);

  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOC, GPIO_PinSource12, GPIO_AF_SDIO);
  GPIO_PinAFConfig(GPIOD, GPIO_PinSource2, GPIO_AF_SDIO);

  /* Configure PC.08, PC.09, PC.10, PC.11 pins: D0, D1, D2, D3 pins */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure PD.02 CMD line */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

  /* Configure PC.12 pin: CLK pin */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Enable the SDIO APB2 Clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SDIO, ENABLE);

  /* Enable the DMA2 Clock */
  RCC_AHB1PeriphClockCmd(SD_SDIO_DMA_CLK, ENABLE);
}

/**
  * @brief  Configures the DMA2 Channel4 for SDIO Tx request.
  * @param  BufferSRC: pointer to the source buffer
  * @param  BufferSize: buffer size
  * @retval None
  */
void SD_LowLevel_DMA_TxConfig(uint32_t *BufferSRC, uint32_t BufferSize)
{
  DMA_InitTypeDef SDDMA_InitStructure;

  DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

  /* DMA2 Stream3  or Stream6 disable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

  /* DMA2 Stream3  or Stream6 Config */
  DMA_DeInit(SD_SDIO_DMA_STREAM);

  SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
  SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
  SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferSRC;
  SDDMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  SDDMA_InitStructure.DMA_BufferSize = BufferSize;
  SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
  SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
  SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
  DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
  DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
  DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

  /* DMA2 Stream3  or Stream6 enable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
    
}

/**
  * @brief  Configures the DMA2 Channel4 for SDIO Rx request.
  * @param  BufferDST: pointer to the destination buffer
  * @param  BufferSize: buffer size
  * @retval None
  */
void SD_LowLevel_DMA_RxConfig(uint32_t *BufferDST, uint32_t BufferSize)
{
  DMA_InitTypeDef SDDMA_InitStructure;

  DMA_ClearFlag(SD_SDIO_DMA_STREAM, SD_SDIO_DMA_FLAG_FEIF | SD_SDIO_DMA_FLAG_DMEIF | SD_SDIO_DMA_FLAG_TEIF | SD_SDIO_DMA_FLAG_HTIF | SD_SDIO_DMA_FLAG_TCIF);

  /* DMA2 Stream3  or Stream6 disable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, DISABLE);

  /* DMA2 Stream3 or Stream6 Config */
  DMA_DeInit(SD_SDIO_DMA_STREAM);

  SDDMA_InitStructure.DMA_Channel = SD_SDIO_DMA_CHANNEL;
  SDDMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SDIO_FIFO_ADDRESS;
  SDDMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)BufferDST;
  SDDMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  SDDMA_InitStructure.DMA_BufferSize = BufferSize;
  SDDMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  SDDMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  SDDMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  SDDMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
  SDDMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  SDDMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  SDDMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
  SDDMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  SDDMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;
  SDDMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_INC4;
  DMA_Init(SD_SDIO_DMA_STREAM, &SDDMA_InitStructure);
  DMA_ITConfig(SD_SDIO_DMA_STREAM, DMA_IT_TC, ENABLE);
  DMA_FlowControllerConfig(SD_SDIO_DMA_STREAM, DMA_FlowCtrl_Peripheral);

  /* DMA2 Stream3 or Stream6 enable */
  DMA_Cmd(SD_SDIO_DMA_STREAM, ENABLE);
}

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