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//*----------------------------------------------------------------------------
//* ATMEL Microcontroller Software Support - ROUSSET -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name : mci_device.c
//* Object : TEST DataFlash Functions
//* Creation : FB 26/11/2002
//*
//*----------------------------------------------------------------------------
#include <AT91C_MCI_Device.h>
#include "stdio.h"
#define AT91C_MCI_TIMEOUT 1000000 /* For AT91F_MCIDeviceWaitReady */
#define BUFFER_SIZE_MCI_DEVICE 512
#define MASTER_CLOCK 60000000
#define FALSE 0
#define TRUE 1
//* External Functions
extern void AT91F_ASM_MCI_Handler(void);
//* Global Variables
AT91S_MciDeviceFeatures MCI_Device_Features;
AT91S_MciDeviceDesc MCI_Device_Desc;
AT91S_MciDevice MCI_Device;
#undef ENABLE_WRITE
#undef MMC
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SendCommand
//* \brief Generic function to send a command to the MMC or SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SendCommand (
AT91PS_MciDevice pMCI_Device,
unsigned int Cmd,
unsigned int Arg)
{
unsigned int error,status;
//unsigned int tick=0;
// Send the command
AT91C_BASE_MCI->MCI_ARGR = Arg;
AT91C_BASE_MCI->MCI_CMDR = Cmd;
// wait for CMDRDY Status flag to read the response
do
{
status = AT91C_BASE_MCI->MCI_SR;
//tick++;
}
while( !(status & AT91C_MCI_CMDRDY) );//&& (tick<100) );
// Test error ==> if crc error and response R3 ==> don't check error
error = (AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR;
if(error != 0 )
{
// if the command is SEND_OP_COND the CRC error flag is always present (cf : R3 response)
if ( (Cmd != AT91C_SDCARD_APP_OP_COND_CMD) && (Cmd != AT91C_MMC_SEND_OP_COND_CMD) )
return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);
else
{
if (error != AT91C_MCI_RCRCE)
return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);
}
}
return AT91C_CMD_SEND_OK;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_SendAppCommand
//* \brief Specific function to send a specific command to the SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_SendAppCommand (
AT91PS_MciDevice pMCI_Device,
unsigned int Cmd_App,
unsigned int Arg )
{
unsigned int status;
//unsigned int tick=0;
// Send the CMD55 for application specific command
AT91C_BASE_MCI->MCI_ARGR = (pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address << 16 );
AT91C_BASE_MCI->MCI_CMDR = AT91C_APP_CMD;
// wait for CMDRDY Status flag to read the response
do
{
status = AT91C_BASE_MCI->MCI_SR;
//tick++;
}
while( !(status & AT91C_MCI_CMDRDY) );//&& (tick<100) );
// if an error occurs
if (((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR) != 0 )
return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);
// check if it is a specific command and then send the command
if ( (Cmd_App && AT91C_SDCARD_APP_ALL_CMD) == 0)
return AT91C_CMD_SEND_ERROR;
return( AT91F_MCI_SendCommand(pMCI_Device,Cmd_App,Arg) );
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_GetStatus
//* \brief Addressed card sends its status register
//*----------------------------------------------------------------------------
int AT91F_MCI_GetStatus(AT91PS_MciDevice pMCI_Device,unsigned int relative_card_address)
{
if (AT91F_MCI_SendCommand(pMCI_Device,
AT91C_SEND_STATUS_CMD,
relative_card_address <<16) == AT91C_CMD_SEND_OK)
return (AT91C_BASE_MCI->MCI_RSPR[0]);
return AT91C_CMD_SEND_ERROR;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_Device_Handler
//* \brief MCI C interrupt handler
//*----------------------------------------------------------------------------
void AT91F_MCI_Device_Handler(
AT91PS_MciDevice pMCI_Device,
unsigned int status)
{
// If End of Tx Buffer Empty interrupt occurred
if ( status & AT91C_MCI_TXBUFE )
{
AT91C_BASE_MCI->MCI_IDR = AT91C_MCI_TXBUFE;
AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_TXTDIS;
pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_IDLE;
} // End of if AT91C_MCI_TXBUFF
// If End of Rx Buffer Full interrupt occurred
if ( status & AT91C_MCI_RXBUFF )
{
AT91C_BASE_MCI->MCI_IDR = AT91C_MCI_RXBUFF;
AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_RXTDIS;
pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_IDLE;
} // End of if AT91C_MCI_RXBUFF
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_Handler
//* \brief MCI Handler
//*----------------------------------------------------------------------------
void AT91F_MCI_Handler(void)
{
int status;
status = ( AT91C_BASE_MCI->MCI_SR & AT91C_BASE_MCI->MCI_IMR );
AT91F_MCI_Device_Handler(&MCI_Device,status);
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_ReadBlock
//* \brief Read an ENTIRE block or PARTIAL block
//*----------------------------------------------------------------------------
int AT91F_MCI_ReadBlock(
AT91PS_MciDevice pMCI_Device,
int src,
unsigned int *dataBuffer,
int sizeToRead )
{
////////////////////////////////////////////////////////////////////////////////////////////
if(pMCI_Device->pMCI_DeviceDesc->state != AT91C_MCI_IDLE)
return AT91C_READ_ERROR;
if( (AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address) & AT91C_SR_READY_FOR_DATA) != AT91C_SR_READY_FOR_DATA)
return AT91C_READ_ERROR;
if ( (src + sizeToRead) > pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity )
return AT91C_READ_ERROR;
// If source does not fit a begin of a block
if ( (src % pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) != 0 )
return AT91C_READ_ERROR;
// Test if the MMC supports Partial Read Block
// ALWAYS SUPPORTED IN SD Memory Card
if( (sizeToRead < pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length)
&& (pMCI_Device->pMCI_DeviceFeatures->Read_Partial == 0x00) )
return AT91C_READ_ERROR;
if( sizeToRead > pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length)
return AT91C_READ_ERROR;
////////////////////////////////////////////////////////////////////////////////////////////
// Init Mode Register
AT91C_BASE_MCI->MCI_MR |= ((pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length << 16) | AT91C_MCI_PDCMODE);
if (sizeToRead %4)
sizeToRead = (sizeToRead /4)+1;
else
sizeToRead = sizeToRead/4;
AT91C_BASE_PDC_MCI->PDC_PTCR = (AT91C_PDC_TXTDIS | AT91C_PDC_RXTDIS);
AT91C_BASE_PDC_MCI->PDC_RPR = (unsigned int)dataBuffer;
AT91C_BASE_PDC_MCI->PDC_RCR = sizeToRead;
// Send the Read single block command
if ( AT91F_MCI_SendCommand(pMCI_Device, AT91C_READ_SINGLE_BLOCK_CMD, src) != AT91C_CMD_SEND_OK )
return AT91C_READ_ERROR;
pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_RX_SINGLE_BLOCK;
// Enable AT91C_MCI_RXBUFF Interrupt
AT91C_BASE_MCI->MCI_IER = AT91C_MCI_RXBUFF;
// (PDC) Receiver Transfer Enable
AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_RXTEN;
return AT91C_READ_OK;
}
#ifdef ENABLE_WRITE
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_WriteBlock
//* \brief Write an ENTIRE block but not always PARTIAL block !!!
//*----------------------------------------------------------------------------
int AT91F_MCI_WriteBlock(
AT91PS_MciDevice pMCI_Device,
int dest,
unsigned int *dataBuffer,
int sizeToWrite )
{
////////////////////////////////////////////////////////////////////////////////////////////
if( pMCI_Device->pMCI_DeviceDesc->state != AT91C_MCI_IDLE)
return AT91C_WRITE_ERROR;
if( (AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address) & AT91C_SR_READY_FOR_DATA) != AT91C_SR_READY_FOR_DATA)
return AT91C_WRITE_ERROR;
if ( (dest + sizeToWrite) > pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity )
return AT91C_WRITE_ERROR;
// If source does not fit a begin of a block
if ( (dest % pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) != 0 )
return AT91C_WRITE_ERROR;
// Test if the MMC supports Partial Write Block
if( (sizeToWrite < pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length)
&& (pMCI_Device->pMCI_DeviceFeatures->Write_Partial == 0x00) )
return AT91C_WRITE_ERROR;
if( sizeToWrite > pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length )
return AT91C_WRITE_ERROR;
////////////////////////////////////////////////////////////////////////////////////////////
// Init Mode Register
AT91C_BASE_MCI->MCI_MR |= ((pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length << 16) | AT91C_MCI_PDCMODE);
if (sizeToWrite %4)
sizeToWrite = (sizeToWrite /4)+1;
else
sizeToWrite = sizeToWrite/4;
// Init PDC for write sequence
AT91C_BASE_PDC_MCI->PDC_PTCR = (AT91C_PDC_TXTDIS | AT91C_PDC_RXTDIS);
AT91C_BASE_PDC_MCI->PDC_TPR = (unsigned int) dataBuffer;
AT91C_BASE_PDC_MCI->PDC_TCR = sizeToWrite;
// Send the write single block command
if ( AT91F_MCI_SendCommand(pMCI_Device, AT91C_WRITE_BLOCK_CMD, dest) != AT91C_CMD_SEND_OK)
return AT91C_WRITE_ERROR;
pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_TX_SINGLE_BLOCK;
// Enable AT91C_MCI_TXBUFE Interrupt
AT91C_BASE_MCI->MCI_IER = AT91C_MCI_TXBUFE;
// Enables TX for PDC transfert requests
AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_TXTEN;
return AT91C_WRITE_OK;
}
#endif
#ifdef MMC
//*------------------------------------------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_SelectCard
//* \brief Toggles a card between the Stand_by and Transfer states or between Programming and Disconnect states
//*------------------------------------------------------------------------------------------------------------
int AT91F_MCI_MMC_SelectCard(AT91PS_MciDevice pMCI_Device, unsigned int relative_card_address)
{
int status;
//* Check if the MMC card chosen is already the selected one
status = AT91F_MCI_GetStatus(pMCI_Device,relative_card_address);
if (status < 0)
return AT91C_CARD_SELECTED_ERROR;
if ((status & AT91C_SR_CARD_SELECTED) == AT91C_SR_CARD_SELECTED)
return AT91C_CARD_SELECTED_OK;
//* Search for the MMC Card to be selected, status = the Corresponding Device Number
status = 0;
while( (pMCI_Device->pMCI_DeviceFeatures[status].Relative_Card_Address != relative_card_address)
&& (status < AT91C_MAX_MCI_CARDS) )
status++;
if (status > AT91C_MAX_MCI_CARDS)
return AT91C_CARD_SELECTED_ERROR;
if (AT91F_MCI_SendCommand( pMCI_Device,
AT91C_SEL_DESEL_CARD_CMD,
pMCI_Device->pMCI_DeviceFeatures[status].Relative_Card_Address << 16) == AT91C_CMD_SEND_OK)
return AT91C_CARD_SELECTED_OK;
return AT91C_CARD_SELECTED_ERROR;
}
#endif
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_GetCSD
//* \brief Asks to the specified card to send its CSD
//*----------------------------------------------------------------------------
int AT91F_MCI_GetCSD (AT91PS_MciDevice pMCI_Device, unsigned int relative_card_address , unsigned int * response)
{
if(AT91F_MCI_SendCommand(pMCI_Device,
AT91C_SEND_CSD_CMD,
(relative_card_address << 16)) != AT91C_CMD_SEND_OK)
return AT91C_CMD_SEND_ERROR;
response[0] = AT91C_BASE_MCI->MCI_RSPR[0];
response[1] = AT91C_BASE_MCI->MCI_RSPR[1];
response[2] = AT91C_BASE_MCI->MCI_RSPR[2];
response[3] = AT91C_BASE_MCI->MCI_RSPR[3];
return AT91C_CMD_SEND_OK;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SetBlocklength
//* \brief Select a block length for all following block commands (R/W)
//*----------------------------------------------------------------------------
int AT91F_MCI_SetBlocklength(AT91PS_MciDevice pMCI_Device,unsigned int length)
{
return( AT91F_MCI_SendCommand(pMCI_Device, AT91C_SET_BLOCKLEN_CMD, length) );
}
#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_GetAllOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_GetAllOCR (AT91PS_MciDevice pMCI_Device)
{
unsigned int response =0x0;
while(1)
{
response = AT91F_MCI_SendCommand(pMCI_Device,
AT91C_MMC_SEND_OP_COND_CMD,
AT91C_MMC_HOST_VOLTAGE_RANGE);
if (response != AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
response = AT91C_BASE_MCI->MCI_RSPR[0];
if ( (response & AT91C_CARD_POWER_UP_BUSY) == AT91C_CARD_POWER_UP_BUSY)
return(response);
}
}
#endif
#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_GetAllCID
//* \brief Asks to the MMC on the chosen slot to send its CID
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_GetAllCID (AT91PS_MciDevice pMCI_Device, unsigned int *response)
{
int Nb_Cards_Found=-1;
while(1)
{
if(AT91F_MCI_SendCommand(pMCI_Device,
AT91C_MMC_ALL_SEND_CID_CMD,
AT91C_NO_ARGUMENT) != AT91C_CMD_SEND_OK)
return Nb_Cards_Found;
else
{
Nb_Cards_Found = 0;
//* Assignation of the relative address to the MMC CARD
pMCI_Device->pMCI_DeviceFeatures[Nb_Cards_Found].Relative_Card_Address = Nb_Cards_Found + AT91C_FIRST_RCA;
//* Set the insert flag
pMCI_Device->pMCI_DeviceFeatures[Nb_Cards_Found].Card_Inserted = AT91C_MMC_CARD_INSERTED;
if (AT91F_MCI_SendCommand(pMCI_Device,
AT91C_MMC_SET_RELATIVE_ADDR_CMD,
(Nb_Cards_Found + AT91C_FIRST_RCA) << 16) != AT91C_CMD_SEND_OK)
return AT91C_CMD_SEND_ERROR;
//* If no error during assignation address ==> Increment Nb_cards_Found
Nb_Cards_Found++ ;
}
}
}
#endif
#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_Init
//* \brief Return the MMC initialisation status
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_Init (AT91PS_MciDevice pMCI_Device)
{
unsigned int tab_response[4];
unsigned int mult,blocknr;
unsigned int i,Nb_Cards_Found=0;
//* Resets all MMC Cards in Idle state
AT91F_MCI_SendCommand(pMCI_Device, AT91C_MMC_GO_IDLE_STATE_CMD, AT91C_NO_ARGUMENT);
if(AT91F_MCI_MMC_GetAllOCR(pMCI_Device) == AT91C_INIT_ERROR)
return AT91C_INIT_ERROR;
Nb_Cards_Found = AT91F_MCI_MMC_GetAllCID(pMCI_Device,tab_response);
if (Nb_Cards_Found != AT91C_CMD_SEND_ERROR)
{
//* Set the Mode Register
AT91C_BASE_MCI->MCI_MR = AT91C_MCI_MR_PDCMODE;
for(i = 0; i < Nb_Cards_Found; i++)
{
if (AT91F_MCI_GetCSD(pMCI_Device,
pMCI_Device->pMCI_DeviceFeatures[i].Relative_Card_Address,
tab_response) != AT91C_CMD_SEND_OK)
pMCI_Device->pMCI_DeviceFeatures[i].Relative_Card_Address = 0;
else
{
pMCI_Device->pMCI_DeviceFeatures[i].Max_Read_DataBlock_Length = 1 << ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) & AT91C_CSD_RD_B_LEN_M );
pMCI_Device->pMCI_DeviceFeatures[i].Max_Write_DataBlock_Length = 1 << ((tab_response[3] >> AT91C_CSD_WBLEN_S) & AT91C_CSD_WBLEN_M );
pMCI_Device->pMCI_DeviceFeatures[i].Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v22_SECT_SIZE_S) & AT91C_CSD_v22_SECT_SIZE_M );
pMCI_Device->pMCI_DeviceFeatures[i].Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) & AT91C_CSD_RD_B_PAR_M;
pMCI_Device->pMCI_DeviceFeatures[i].Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) & AT91C_CSD_WBLOCK_P_M;
// None in MMC specification version 2.2
pMCI_Device->pMCI_DeviceFeatures[i].Erase_Block_Enable = 0;
pMCI_Device->pMCI_DeviceFeatures[i].Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) & AT91C_CSD_RD_B_MIS_M;
pMCI_Device->pMCI_DeviceFeatures[i].Write_Block_Misalignment = (tab_response[1] >> AT91C_CSD_WR_B_MIS_S) & AT91C_CSD_WR_B_MIS_M;
//// Compute Memory Capacity
// compute MULT
mult = 1 << ( ((tab_response[2] >> AT91C_CSD_C_SIZE_M_S) & AT91C_CSD_C_SIZE_M_M) + 2 );
// compute MSB of C_SIZE
blocknr = ((tab_response[1] >> AT91C_CSD_CSIZE_H_S) & AT91C_CSD_CSIZE_H_M) << 2;
// compute MULT * (LSB of C-SIZE + MSB already computed + 1) = BLOCKNR
blocknr = mult * ( ( blocknr + ( (tab_response[2] >> AT91C_CSD_CSIZE_L_S) & AT91C_CSD_CSIZE_L_M) ) + 1 );
pMCI_Device->pMCI_DeviceFeatures[i].Memory_Capacity = pMCI_Device->pMCI_DeviceFeatures[i].Max_Read_DataBlock_Length * blocknr;
//// End of Compute Memory Capacity
} // end of else
} // end of for
return AT91C_INIT_OK;
} // end of if
return AT91C_INIT_ERROR;
}
#endif
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_GetOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_GetOCR (AT91PS_MciDevice pMCI_Device)
{
unsigned int response =0x0;
// The RCA to be used for CMD55 in Idle state shall be the card's default RCA=0x0000.
pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address = 0x0;
while( (response & AT91C_CARD_POWER_UP_BUSY) != AT91C_CARD_POWER_UP_BUSY )
{
response = AT91F_MCI_SDCard_SendAppCommand(pMCI_Device,
AT91C_SDCARD_APP_OP_COND_CMD,
AT91C_MMC_HOST_VOLTAGE_RANGE);
if (response != AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
response = AT91C_BASE_MCI->MCI_RSPR[0];
}
return(AT91C_BASE_MCI->MCI_RSPR[0]);
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_GetCID
//* \brief Asks to the SDCard on the chosen slot to send its CID
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_GetCID (AT91PS_MciDevice pMCI_Device, unsigned int *response)
{
if(AT91F_MCI_SendCommand(pMCI_Device,
AT91C_ALL_SEND_CID_CMD,
AT91C_NO_ARGUMENT) != AT91C_CMD_SEND_OK)
return AT91C_CMD_SEND_ERROR;
response[0] = AT91C_BASE_MCI->MCI_RSPR[0];
response[1] = AT91C_BASE_MCI->MCI_RSPR[1];
response[2] = AT91C_BASE_MCI->MCI_RSPR[2];
response[3] = AT91C_BASE_MCI->MCI_RSPR[3];
return AT91C_CMD_SEND_OK;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_SetBusWidth
//* \brief Set bus width for SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_SetBusWidth(AT91PS_MciDevice pMCI_Device)
{
volatile int ret_value;
char bus_width;
do
{
ret_value =AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address);
}
while((ret_value > 0) && ((ret_value & AT91C_SR_READY_FOR_DATA) == 0));
// Select Card
AT91F_MCI_SendCommand(pMCI_Device,
AT91C_SEL_DESEL_CARD_CMD,
(pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address)<<16);
// Set bus width for Sdcard
if(pMCI_Device->pMCI_DeviceDesc->SDCard_bus_width == AT91C_MCI_SCDBUS)
bus_width = AT91C_BUS_WIDTH_4BITS;
else bus_width = AT91C_BUS_WIDTH_1BIT;
if (AT91F_MCI_SDCard_SendAppCommand(pMCI_Device,AT91C_SDCARD_SET_BUS_WIDTH_CMD,bus_width) != AT91C_CMD_SEND_OK)
return AT91C_CMD_SEND_ERROR;
return AT91C_CMD_SEND_OK;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_Init
//* \brief Return the SDCard initialisation status
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_Init (AT91PS_MciDevice pMCI_Device)
{
unsigned int tab_response[4];
unsigned int mult,blocknr;
AT91F_MCI_SendCommand(pMCI_Device, AT91C_GO_IDLE_STATE_CMD, AT91C_NO_ARGUMENT);
if(AT91F_MCI_SDCard_GetOCR(pMCI_Device) == AT91C_INIT_ERROR)
return AT91C_INIT_ERROR;
if (AT91F_MCI_SDCard_GetCID(pMCI_Device,tab_response) == AT91C_CMD_SEND_OK)
{
pMCI_Device->pMCI_DeviceFeatures->Card_Inserted = AT91C_SD_CARD_INSERTED;
if (AT91F_MCI_SendCommand(pMCI_Device, AT91C_SET_RELATIVE_ADDR_CMD, 0) == AT91C_CMD_SEND_OK)
{
pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address = (AT91C_BASE_MCI->MCI_RSPR[0] >> 16);
if (AT91F_MCI_GetCSD(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address,tab_response) == AT91C_CMD_SEND_OK)
{
pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length = 1 << ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) & AT91C_CSD_RD_B_LEN_M );
pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length = 1 << ((tab_response[3] >> AT91C_CSD_WBLEN_S) & AT91C_CSD_WBLEN_M );
pMCI_Device->pMCI_DeviceFeatures->Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v21_SECT_SIZE_S) & AT91C_CSD_v21_SECT_SIZE_M );
pMCI_Device->pMCI_DeviceFeatures->Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) & AT91C_CSD_RD_B_PAR_M;
pMCI_Device->pMCI_DeviceFeatures->Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) & AT91C_CSD_WBLOCK_P_M;
pMCI_Device->pMCI_DeviceFeatures->Erase_Block_Enable = (tab_response[3] >> AT91C_CSD_v21_ER_BLEN_EN_S) & AT91C_CSD_v21_ER_BLEN_EN_M;
pMCI_Device->pMCI_DeviceFeatures->Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) & AT91C_CSD_RD_B_MIS_M;
pMCI_Device->pMCI_DeviceFeatures->Write_Block_Misalignment = (tab_response[1] >> AT91C_CSD_WR_B_MIS_S) & AT91C_CSD_WR_B_MIS_M;
//// Compute Memory Capacity
// compute MULT
mult = 1 << ( ((tab_response[2] >> AT91C_CSD_C_SIZE_M_S) & AT91C_CSD_C_SIZE_M_M) + 2 );
// compute MSB of C_SIZE
blocknr = ((tab_response[1] >> AT91C_CSD_CSIZE_H_S) & AT91C_CSD_CSIZE_H_M) << 2;
// compute MULT * (LSB of C-SIZE + MSB already computed + 1) = BLOCKNR
blocknr = mult * ( ( blocknr + ( (tab_response[2] >> AT91C_CSD_CSIZE_L_S) & AT91C_CSD_CSIZE_L_M) ) + 1 );
pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity = pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length * blocknr;
//// End of Compute Memory Capacity
printf("SD-Card: %d Bytes\n\r", pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity);
if( AT91F_MCI_SDCard_SetBusWidth(pMCI_Device) == AT91C_CMD_SEND_OK )
{
if (AT91F_MCI_SetBlocklength(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) == AT91C_CMD_SEND_OK)
return AT91C_INIT_OK;
}
}
}
}
return AT91C_INIT_ERROR;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_CfgDevice
//* \brief This function is used to initialise MMC or SDCard Features
//*----------------------------------------------------------------------------
void AT91F_CfgDevice(void)
{
// Init Device Structure
MCI_Device_Features.Relative_Card_Address = 0;
MCI_Device_Features.Card_Inserted = AT91C_CARD_REMOVED;
MCI_Device_Features.Max_Read_DataBlock_Length = 0;
MCI_Device_Features.Max_Write_DataBlock_Length = 0;
MCI_Device_Features.Read_Partial = 0;
MCI_Device_Features.Write_Partial = 0;
MCI_Device_Features.Erase_Block_Enable = 0;
MCI_Device_Features.Sector_Size = 0;
MCI_Device_Features.Memory_Capacity = 0;
MCI_Device_Desc.state = AT91C_MCI_IDLE;
MCI_Device_Desc.SDCard_bus_width = AT91C_MCI_SCDBUS;
// Init AT91S_DataFlash Global Structure, by default AT45DB choosen !!!
MCI_Device.pMCI_DeviceDesc = &MCI_Device_Desc;
MCI_Device.pMCI_DeviceFeatures = &MCI_Device_Features;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_Init
//* \brief Initialsise Card
//*----------------------------------------------------------------------------
int AT91F_MCI_Init(void)
{
///////////////////////////////////////////////////////////////////////////////////////////
// MCI Init : common to MMC and SDCard
///////////////////////////////////////////////////////////////////////////////////////////
// Set up PIO SDC_TYPE to switch on MMC/SDCard and not DataFlash Card
AT91F_PIO_CfgOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
AT91F_PIO_SetOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
// Init MCI for MMC and SDCard interface
AT91F_MCI_CfgPIO();
AT91F_MCI_CfgPMC();
AT91F_PDC_Open(AT91C_BASE_PDC_MCI);
// Disable all the interrupts
AT91C_BASE_MCI->MCI_IDR = 0xFFFFFFFF;
// Init MCI Device Structures
AT91F_CfgDevice();
// Configure MCI interrupt
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC,
AT91C_ID_MCI,
AT91C_AIC_PRIOR_HIGHEST,
AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE,
AT91F_ASM_MCI_Handler);
// Enable MCI interrupt
AT91F_AIC_EnableIt(AT91C_BASE_AIC,AT91C_ID_MCI);
// Enable Receiver
AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_DBGU);
AT91F_MCI_Configure(AT91C_BASE_MCI,
AT91C_MCI_DTOR_1MEGA_CYCLES,
AT91C_MCI_MR_PDCMODE, // 15MHz for MCK = 60MHz (CLKDIV = 1)
AT91C_MCI_SDCARD_4BITS_SLOTA);
if(AT91F_MCI_SDCard_Init(&MCI_Device) != AT91C_INIT_OK)
return FALSE;
else
return TRUE;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCIDeviceWaitReady
//* \brief Wait for MCI Device ready
//*----------------------------------------------------------------------------
void AT91F_MCIDeviceWaitReady(unsigned int timeout)
{
volatile int status;
do
{
status = AT91C_BASE_MCI->MCI_SR;
timeout--;
}
while( !(status & AT91C_MCI_NOTBUSY) && (timeout>0) );
}
unsigned int swab32(unsigned int data)
{
unsigned int res = 0;
res = (data & 0x000000ff) << 24 |
(data & 0x0000ff00) << 8 |
(data & 0x00ff0000) >> 8 |
(data & 0xff000000) >> 24;
return res;
}
//*--------------------------------------------------------------------
//* \fn AT91F_MCI_ReadBlockSwab
//* \brief Read Block and swap byte order
//*--------------------------------------------------------------------
int AT91F_MCI_ReadBlockSwab(
AT91PS_MciDevice pMCI_Device,
int src,
unsigned int *databuffer,
int sizeToRead)
{
int i;
unsigned char *buf = (unsigned char *)databuffer;
//* Read Block 1
for(i=0;i<BUFFER_SIZE_MCI_DEVICE;i++)
*buf++ = 0x00;
AT91F_MCI_ReadBlock(&MCI_Device,src,databuffer,sizeToRead);
//* Wait end of Read
AT91F_MCIDeviceWaitReady(AT91C_MCI_TIMEOUT);
{
int index;
unsigned int *uiBuffer = databuffer;
for(index = 0; index < 512/4; index++)
uiBuffer[index] = swab32(uiBuffer[index]);
}
return(1);
}