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freebsd-dev/sys/boot/arm/at91/libat91/mci_device.c

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/*-
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*
* This software is derived from software provide by Kwikbyte who specifically
* disclaimed copyright on the code.
*
* $FreeBSD$
*/
//*----------------------------------------------------------------------------
//* 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 "at91rm9200.h"
#include "lib_AT91RM9200.h"
#include "mci_device.h"
#include "lib.h"
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SendCommand
//* \brief Generic function to send a command to the MMC or SDCard
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_SendCommand(
unsigned int Cmd,
unsigned int Arg)
{
unsigned int error,status;
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;
} while( !(status & AT91C_MCI_CMDRDY) );
// 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);
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
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_SDCard_SendAppCommand(
AT91PS_MciDevice pMCI_Device,
unsigned int Cmd_App,
unsigned int Arg)
{
unsigned int status;
// 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;
}
while( !(status & AT91C_MCI_CMDRDY) );
// 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(Cmd_App,Arg));
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_GetStatus
//* \brief Addressed card sends its status register
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_GetStatus(unsigned int relative_card_address)
{
if (AT91F_MCI_SendCommand(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 (pMCI_Device->pMCI_DeviceDesc->state == AT91C_MCI_TX_SINGLE_BLOCK && 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 (pMCI_Device->pMCI_DeviceDesc->state == AT91C_MCI_RX_SINGLE_BLOCK && 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_ReadBlock
//* \brief Read an ENTIRE block or PARTIAL block
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus
AT91F_MCI_ReadBlock(
AT91PS_MciDevice pMCI_Device,
int src,
unsigned int *dataBuffer,
int sizeToRead)
{
///////////////////////////////////////////////////////////////////////
if (pMCI_Device->pMCI_DeviceDesc->state != AT91C_MCI_IDLE) {
#if IMP_DEBUG
printf("1 state is 0x%x\r\n", pMCI_Device->pMCI_DeviceDesc->state);
#endif
return AT91C_READ_ERROR;
}
if ((AT91F_MCI_GetStatus(
pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address) & AT91C_SR_READY_FOR_DATA) !=
AT91C_SR_READY_FOR_DATA) {
#if IMP_DEBUG
printf("2\r\n");
#endif
return AT91C_READ_ERROR;
}
if ( (src + sizeToRead) > pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity ) {
#if IMP_DEBUG
printf("3\r\n");
#endif
return AT91C_READ_ERROR;
}
// If source does not fit a begin of a block
if ((src & ((1 << pMCI_Device->pMCI_DeviceFeatures->READ_BL_LEN) - 1)) != 0) {
#if IMP_DEBUG
printf("4\r\n");
#endif
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) ) {
#if IMP_DEBUG
printf("5\r\n");
#endif
return AT91C_READ_ERROR;
}
if( sizeToRead > pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) {
#if IMP_DEBUG
printf("6\r\n");
#endif
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(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;
}
#if 0
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_WriteBlock
//* \brief Write an ENTIRE block but not always PARTIAL block !!!
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus
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_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(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;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_SelectCard
//* \brief Toggles a card between the Stand_by and Transfer states or between Programming and Disconnect states
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus
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(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(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
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_GetCSD(unsigned int relative_card_address , unsigned int * response)
{
if(AT91F_MCI_SendCommand(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)
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus
AT91F_MCI_SetBlocklength(unsigned int length)
{
return( AT91F_MCI_SendCommand(AT91C_SET_BLOCKLEN_CMD, length) );
}
#if 0
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_GetAllOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_MMC_GetAllOCR()
{
unsigned int response =0x0;
while(1) {
response = AT91F_MCI_SendCommand(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);
}
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_GetAllCID
//* \brief Asks to the MMC on the chosen slot to send its CID
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_MMC_GetAllCID(AT91PS_MciDevice pMCI_Device, unsigned int *response)
{
int Nb_Cards_Found=-1;
while (1) {
if(AT91F_MCI_SendCommand(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(
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++ ;
}
}
}
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_MMC_Init
//* \brief Return the MMC initialisation status
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus
AT91F_MCI_MMC_Init (AT91PS_MciDevice pMCI_Device)
{
unsigned int tab_response[4];
unsigned int mult,blocknr;
unsigned int i,Nb_Cards_Found=0;
AT91PS_MciDeviceFeatures f;
//* Resets all MMC Cards in Idle state
AT91F_MCI_SendCommand(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)
return AT91C_INIT_ERROR;
//* Set the Mode Register
AT91C_BASE_MCI->MCI_MR = AT91C_MCI_MR_PDCMODE;
for(i = 0; i < Nb_Cards_Found; i++) {
f = pMCI_Device->pMCI_DeviceFeatures + i;
if (AT91F_MCI_GetCSD(f->Relative_Card_Address, tab_response) !=
AT91C_CMD_SEND_OK) {
f->Relative_Card_Address = 0;
continue;
}
f->READ_BL_LEN = ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) & AT91C_CSD_RD_B_LEN_M);
f->WRITE_BL_LEN = ((tab_response[3] >> AT91C_CSD_WBLEN_S) & AT91C_CSD_WBLEN_M );
f->Max_Read_DataBlock_Length = 1 << f->READ_BL_LEN;
f->Max_Write_DataBlock_Length = 1 << f->WRITE_BL_LEN;
f->Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v22_SECT_SIZE_S) & AT91C_CSD_v22_SECT_SIZE_M );
f->Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) & AT91C_CSD_RD_B_PAR_M;
f->Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) & AT91C_CSD_WBLOCK_P_M;
// None in MMC specification version 2.2
f->Erase_Block_Enable = 0;
f->Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) & AT91C_CSD_RD_B_MIS_M;
f->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 );
f->Memory_Capacity = f->Max_Read_DataBlock_Length * blocknr;
//// End of Compute Memory Capacity
}
// XXX warner hacked this
return AT91C_INIT_OK;
}
#endif
//*----------------------------------------------------------------------------
//* \fn AT91F_MCI_SDCard_GetOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
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
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_SDCard_GetCID(unsigned int *response)
{
if (AT91F_MCI_SendCommand(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
//*----------------------------------------------------------------------------
static AT91S_MCIDeviceStatus
AT91F_MCI_SDCard_SetBusWidth(AT91PS_MciDevice pMCI_Device)
{
volatile int ret_value;
char bus_width;
do {
ret_value =AT91F_MCI_GetStatus(pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address);
}
while((ret_value > 0) && ((ret_value & AT91C_SR_READY_FOR_DATA) == 0));
// Select Card
AT91F_MCI_SendCommand(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
//*----------------------------------------------------------------------------
AT91S_MCIDeviceStatus AT91F_MCI_SDCard_Init (AT91PS_MciDevice pMCI_Device)
{
unsigned int tab_response[4];
unsigned int mult,blocknr;
AT91PS_MciDeviceFeatures f;
AT91F_MCI_SendCommand(AT91C_GO_IDLE_STATE_CMD, AT91C_NO_ARGUMENT);
if (AT91F_MCI_SDCard_GetOCR(pMCI_Device) == AT91C_INIT_ERROR)
return AT91C_INIT_ERROR;
f = pMCI_Device->pMCI_DeviceFeatures;
if (AT91F_MCI_SDCard_GetCID(tab_response) != AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
f->Card_Inserted = AT91C_SD_CARD_INSERTED;
if (AT91F_MCI_SendCommand(AT91C_SET_RELATIVE_ADDR_CMD, 0) !=
AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
f->Relative_Card_Address = (AT91C_BASE_MCI->MCI_RSPR[0] >> 16);
if (AT91F_MCI_GetCSD(f->Relative_Card_Address,tab_response)
!= AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
f->READ_BL_LEN = 1 << ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) &
AT91C_CSD_RD_B_LEN_M);
f->WRITE_BL_LEN = 1 << ((tab_response[3] >> AT91C_CSD_WBLEN_S) &
AT91C_CSD_WBLEN_M);
f->Max_Read_DataBlock_Length = 1 << f->READ_BL_LEN;
f->Max_Write_DataBlock_Length = 1 << f->WRITE_BL_LEN;
f->Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v21_SECT_SIZE_S) &
AT91C_CSD_v21_SECT_SIZE_M);
f->Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) &
AT91C_CSD_RD_B_PAR_M;
f->Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) &
AT91C_CSD_WBLOCK_P_M;
f->Erase_Block_Enable = (tab_response[3] >> AT91C_CSD_v21_ER_BLEN_EN_S) &
AT91C_CSD_v21_ER_BLEN_EN_M;
f->Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) &
AT91C_CSD_RD_B_MIS_M;
f->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);
f->Memory_Capacity = f->Max_Read_DataBlock_Length * blocknr;
//// End of Compute Memory Capacity
if (AT91F_MCI_SDCard_SetBusWidth(pMCI_Device) != AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
if (AT91F_MCI_SetBlocklength(f->Max_Read_DataBlock_Length) !=
AT91C_CMD_SEND_OK)
return AT91C_INIT_ERROR;
return AT91C_INIT_OK;
}
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