/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : sdcard.c
* Author             : MCD Application Team
* Version            : V2.2.0
* Date               : 06/13/2008
* Description        : This file provides all the SD Card driver firmware
*                      functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/

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

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define NULL 0
#define SDIO_STATIC_FLAGS               ((u32)0x000005FF)
#define SDIO_CMD0TIMEOUT                ((u32)0x00002710)
#define SDIO_FIFO_Address               ((u32)0x40018080)

/* Mask for errors Card Status R1 (OCR Register) */
#define SD_OCR_ADDR_OUT_OF_RANGE        ((u32)0x80000000)
#define SD_OCR_ADDR_MISALIGNED          ((u32)0x40000000)
#define SD_OCR_BLOCK_LEN_ERR            ((u32)0x20000000)
#define SD_OCR_ERASE_SEQ_ERR            ((u32)0x10000000)
#define SD_OCR_BAD_ERASE_PARAM          ((u32)0x08000000)
#define SD_OCR_WRITE_PROT_VIOLATION     ((u32)0x04000000)
#define SD_OCR_LOCK_UNLOCK_FAILED       ((u32)0x01000000)
#define SD_OCR_COM_CRC_FAILED           ((u32)0x00800000)
#define SD_OCR_ILLEGAL_CMD              ((u32)0x00400000)
#define SD_OCR_CARD_ECC_FAILED          ((u32)0x00200000)
#define SD_OCR_CC_ERROR                 ((u32)0x00100000)
#define SD_OCR_GENERAL_UNKNOWN_ERROR    ((u32)0x00080000)
#define SD_OCR_STREAM_READ_UNDERRUN     ((u32)0x00040000)
#define SD_OCR_STREAM_WRITE_OVERRUN     ((u32)0x00020000)
#define SD_OCR_CID_CSD_OVERWRIETE       ((u32)0x00010000)
#define SD_OCR_WP_ERASE_SKIP            ((u32)0x00008000)
#define SD_OCR_CARD_ECC_DISABLED        ((u32)0x00004000)
#define SD_OCR_ERASE_RESET              ((u32)0x00002000)
#define SD_OCR_AKE_SEQ_ERROR            ((u32)0x00000008)
#define SD_OCR_ERRORBITS                ((u32)0xFDFFE008)

/* Masks for R6 Response */
#define SD_R6_GENERAL_UNKNOWN_ERROR     ((u32)0x00002000)
#define SD_R6_ILLEGAL_CMD               ((u32)0x00004000)
#define SD_R6_COM_CRC_FAILED            ((u32)0x00008000)

#define SD_VOLTAGE_WINDOW_SD            ((u32)0x80100000)
#define SD_HIGH_CAPACITY                ((u32)0x40000000)
#define SD_STD_CAPACITY                 ((u32)0x00000000)
#define SD_CHECK_PATTERN                ((u32)0x000001AA)

#define SD_MAX_VOLT_TRIAL               ((u32)0x0000FFFF)
#define SD_ALLZERO                      ((u32)0x00000000)

#define SD_WIDE_BUS_SUPPORT             ((u32)0x00040000)
#define SD_SINGLE_BUS_SUPPORT           ((u32)0x00010000)
#define SD_CARD_LOCKED                  ((u32)0x02000000)
#define SD_CARD_PROGRAMMING             ((u32)0x00000007)
#define SD_CARD_RECEIVING               ((u32)0x00000006)
#define SD_DATATIMEOUT                  ((u32)0x000FFFFF)
#define SD_0TO7BITS                     ((u32)0x000000FF)
#define SD_8TO15BITS                    ((u32)0x0000FF00)
#define SD_16TO23BITS                   ((u32)0x00FF0000)
#define SD_24TO31BITS                   ((u32)0xFF000000)
#define SD_MAX_DATA_LENGTH              ((u32)0x01FFFFFF)

#define SD_HALFFIFO                     ((u32)0x00000008)
#define SD_HALFFIFOBYTES                ((u32)0x00000020)

/* Command Class Supported */
#define SD_CCCC_LOCK_UNLOCK             ((u32)0x00000080)
#define SD_CCCC_WRITE_PROT              ((u32)0x00000040)
#define SD_CCCC_ERASE                   ((u32)0x00000020)

/* Following commands are SD Card Specific commands.
   SDIO_APP_CMD should be sent before sending these commands. */
#define SDIO_SEND_IF_COND               ((u32)0x00000008)

#define SDIO_MULTIMEDIA_CARD               ((u32)0x0)
#define SDIO_SECURE_DIGITAL_CARD           ((u32)0x1)
#define SDIO_SECURE_DIGITAL_IO_CARD        ((u32)0x2)
#define SDIO_HIGH_SPEED_MULTIMEDIA_CARD    ((u32)0x3)
#define SDIO_SECURE_DIGITAL_IO_COMBO_CARD  ((u32)0x4)
#define SDIO_HIGH_CAPACITY_SD_CARD         ((u32)0x5)
#define SDIO_HIGH_CAPACITY_MMC_CARD        ((u32)0x6)

#define SDIO_INIT_CLK_DIV                  ((u8)0xB2)
#define SDIO_TRANSFER_CLK_DIV              ((u8)0x1) 

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
static u32 CardType =  SDIO_SECURE_DIGITAL_CARD;
static u32 CSD_Tab[4], CID_Tab[4], RCA = 0;
static u32 DeviceMode = SD_POLLING_MODE;
static u32 TotalNumberOfBytes = 0, StopCondition = 0;
u32 *SrcBuffer, *DestBuffer;
volatile SD_Error TransferError = SD_OK;
vu32 TransferEnd = 0;
vu32 NumberOfBytes = 0;
SDIO_InitTypeDef SDIO_InitStructure;
SDIO_CmdInitTypeDef SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;

/* Private function prototypes -----------------------------------------------*/
static SD_Error CmdError(void);
static SD_Error CmdResp1Error(u8 cmd);
static SD_Error CmdResp7Error(void);
static SD_Error CmdResp3Error(void);
static SD_Error CmdResp2Error(void);
static SD_Error CmdResp6Error(u8 cmd, u16 *prca);
static SD_Error SDEnWideBus(FunctionalState NewState);
static SD_Error IsCardProgramming(u8 *pstatus);
static SD_Error FindSCR(u16 rca, u32 *pscr);
static u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes);
static void GPIO_Configuration(void);
static void DMA_TxConfiguration(u32 *BufferSRC, u32 BufferSize);
static void DMA_RxConfiguration(u32 *BufferDST, u32 BufferSize);

/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name  : SD_Init
* Description    : Initializes the SD Card and put it into StandBy State (Ready 
*                  for data transfer).
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_Init(void)
{
  SD_Error errorstatus = SD_OK;

  /* Configure SDIO interface GPIO */
  GPIO_Configuration();

  /* Enable the SDIO AHB Clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE);

  /* Enable the DMA2 Clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);

  SDIO_DeInit();

  errorstatus = SD_PowerON();

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) */
    return(errorstatus);
  }

  errorstatus = SD_InitializeCards();

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) */
    return(errorstatus);
  }

  /* Configure the SDIO peripheral */
  /* HCLK = 72 MHz, SDIOCLK = 72 MHz, SDIO_CK = HCLK/(2 + 1) = 24 MHz */  
  SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV; 
  SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
  SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
  SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
  SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
  SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
  SDIO_Init(&SDIO_InitStructure);

  return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_PowerON
* Description    : Enquires cards about their operating voltage and configures 
*                  clock controls.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_PowerON(void)
{
  SD_Error errorstatus = SD_OK;
  u32 response = 0, count = 0;
  bool validvoltage = FALSE;
  u32 SDType = SD_STD_CAPACITY;

  /* Power ON Sequence -------------------------------------------------------*/
  /* Configure the SDIO peripheral */
  SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; /* HCLK = 72MHz, SDIOCLK = 72MHz, SDIO_CK = HCLK/(178 + 2) = 400 KHz */
  SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
  SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
  SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
  SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
  SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
  SDIO_Init(&SDIO_InitStructure);

  /* Set Power State to ON */
  SDIO_SetPowerState(SDIO_PowerState_ON);

  /* Enable SDIO Clock */
  SDIO_ClockCmd(ENABLE);

  /* CMD0: GO_IDLE_STATE -------------------------------------------------------*/
  /* No CMD response required */
  SDIO_CmdInitStructure.SDIO_Argument = 0x0;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_GO_IDLE_STATE;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdError();

  if (errorstatus != SD_OK)
  {
    /* CMD Response TimeOut (wait for CMDSENT flag) */
    return(errorstatus);
  }

  /* CMD8: SEND_IF_COND --------------------------------------------------------*/
  /* Send CMD8 to verify SD card interface operating condition */
  /* Argument: - [31:12]: Reserved (shall be set to '0')
               - [11:8]: Supply Voltage (VHS) 0x1 (Range: 2.7-3.6 V)
               - [7:0]: Check Pattern (recommended 0xAA) */
  /* CMD Response: R7 */
  SDIO_CmdInitStructure.SDIO_Argument = SD_CHECK_PATTERN;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_IF_COND;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);

  errorstatus = CmdResp7Error();

  if (errorstatus == SD_OK)
  {
    SDType = SD_HIGH_CAPACITY; /* SD Card 2.0 */
  }
  else
  {
    /* CMD55 */
    SDIO_CmdInitStructure.SDIO_Argument = 0x00;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
    SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
    SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
    SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
    SDIO_SendCommand(&SDIO_CmdInitStructure);
    errorstatus = CmdResp1Error(SDIO_APP_CMD);
  }
  /* CMD55 */
  SDIO_CmdInitStructure.SDIO_Argument = 0x00;
  SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
  SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
  SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
  SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
  SDIO_SendCommand(&SDIO_CmdInitStructure);
  errorstatus = CmdResp1Error(SDIO_APP_CMD);

  /* If errorstatus is Command TimeOut, it is a MMC card */
  /* If errorstatus is SD_OK it is a SD card: SD card 2.0 (voltage range mismatch)
     or SD card 1.x */
  if (errorstatus == SD_OK)
  {
    /* SD CARD */
    /* Send ACMD41 SD_APP_OP_COND with Argument 0x80100000 */
    while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
    {

      /* SEND CMD55 APP_CMD with RCA as 0 */
      SDIO_CmdInitStructure.SDIO_Argument = 0x00;
      SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
      SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
      SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
      SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
      SDIO_SendCommand(&SDIO_CmdInitStructure);

      errorstatus = CmdResp1Error(SDIO_APP_CMD);

      if (errorstatus != SD_OK)
      {
        return(errorstatus);
      }
      SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType;
      SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_OP_COND;
      SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
      SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
      SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
      SDIO_SendCommand(&SDIO_CmdInitStructure);

      errorstatus = CmdResp3Error();
      if (errorstatus != SD_OK)
      {
        return(errorstatus);
      }

      response = SDIO_GetResponse(SDIO_RESP1);
      validvoltage = (bool) (((response >> 31) == 1) ? 1 : 0);
      count++;
    }
    if (count >= SD_MAX_VOLT_TRIAL)
    {
      errorstatus = SD_INVALID_VOLTRANGE;
      return(errorstatus);
    }

    if (SDType == SD_HIGH_CAPACITY)
    {
      CardType = SDIO_HIGH_CAPACITY_SD_CARD;
    }
    else
    {
      CardType = SDIO_SECURE_DIGITAL_CARD;
    }
  }/* else MMC Card */

  return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_PowerOFF
* Description    : Turns the SDIO output signals off.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_PowerOFF(void)
{
  SD_Error errorstatus = SD_OK;

  /* Set Power State to OFF */
  SDIO_SetPowerState(SDIO_PowerState_OFF);

  return(errorstatus);
}

/*******************************************************************************
* Function Name  : SD_InitializeCards
* Description    : Intialises all cards or single card as the case may be. 
*                  Card(s) come into standby state.
* Input          : None
* Output         : None
* Return         : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_InitializeCards(void)
{
  SD_Error errorstatus = SD_OK;
  u16 rca = 0x01;

  if (SDIO_GetPowerState() == SDIO_PowerState_OFF)
  {
    errorstatus = SD_REQUEST_NOT_APPLICABLE;
    return(errorstatus);
  }

  if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
  {
    /* Send CMD2 ALL_SEND_CID */
    SDIO_CmdInitStructure.SDIO_Argument = 0x0;
    SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_ALL_SEND_CID;
    SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
    SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
    SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
    SDIO_SendCommand(&SDIO_CmdInitStructure);

    errorstatus = CmdResp2Error();