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openwrtv3/target/linux/at91/image/dfboot/src/at45.c

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add new dfboot loader - a complete revison of romboot code. SVN-Revision: 7492
2007-06-04 17:41:40 +00:00
/*----------------------------------------------------------------------------
* 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 : at45c.h
* Object :
*
* 1.0 10/12/03 HIi : Creation.
* 1.01 03/05/04 HIi : Bug Fix in AT91F_DataFlashWaitReady() Function.
*----------------------------------------------------------------------------
*/
#include "config.h"
#include "stdio.h"
#include "AT91RM9200.h"
#include "lib_AT91RM9200.h"
#include "dataflash.h"
#include "main.h"
/*----------------------------------------------------------------------------*/
/* \fn AT91F_SpiInit */
/* \brief SPI Low level Init */
/*----------------------------------------------------------------------------*/
void AT91F_SpiInit(void) {
/* Configure PIOs */
AT91C_BASE_PIOA->PIO_ASR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 |
AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
AT91C_PA6_NPCS3 | AT91C_PA0_MISO |
AT91C_PA2_SPCK;
AT91C_BASE_PIOA->PIO_PDR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 |
AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
AT91C_PA6_NPCS3 | AT91C_PA0_MISO |
AT91C_PA2_SPCK;
/* Enable CLock */
AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
/* Reset the SPI */
AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
/* Configure SPI in Master Mode with No CS selected !!! */
AT91C_BASE_SPI->SPI_MR = AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS;
/* Configure CS0 and CS3 */
*(AT91C_SPI_CSR + 0) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & DATAFLASH_TCSS) |
(AT91C_SPI_DLYBCT & DATAFLASH_TCHS) |
((AT91C_MASTER_CLOCK / (2*AT91C_SPI_CLK)) << 8);
*(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & DATAFLASH_TCSS) |
(AT91C_SPI_DLYBCT & DATAFLASH_TCHS) |
((AT91C_MASTER_CLOCK / (2*AT91C_SPI_CLK)) << 8);
}
/*----------------------------------------------------------------------------*/
/* \fn AT91F_SpiEnable */
/* \brief Enable SPI chip select */
/*----------------------------------------------------------------------------*/
static void AT91F_SpiEnable(int cs) {
switch(cs) {
case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS0_SERIAL_DATAFLASH << 16) & AT91C_SPI_PCS);
break;
case 3: /* Configure SPI CS3 for Serial DataFlash Card */
/* Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard */
AT91C_BASE_PIOB->PIO_PER = AT91C_PIO_PB7; /* Set in PIO mode */
AT91C_BASE_PIOB->PIO_OER = AT91C_PIO_PB7; /* Configure in output */
/* Clear Output */
AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
/* Configure PCS */
AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
break;
}
/* SPI_Enable */
AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
}
/*----------------------------------------------------------------------------*/
/* \fn AT91F_SpiWrite */
/* \brief Set the PDC registers for a transfert */
/*----------------------------------------------------------------------------*/
static unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc)
{
unsigned int timeout;
AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
/* Initialize the Transmit and Receive Pointer */
AT91C_BASE_SPI->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt ;
AT91C_BASE_SPI->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt ;
/* Intialize the Transmit and Receive Counters */
AT91C_BASE_SPI->SPI_RCR = pDesc->rx_cmd_size;
AT91C_BASE_SPI->SPI_TCR = pDesc->tx_cmd_size;
if ( pDesc->tx_data_size != 0 ) {
/* Initialize the Next Transmit and Next Receive Pointer */
AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
AT91C_BASE_SPI->SPI_TNPR = (unsigned int)pDesc->tx_data_pt ;
/* Intialize the Next Transmit and Next Receive Counters */
AT91C_BASE_SPI->SPI_RNCR = pDesc->rx_data_size ;
AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
}
/* ARM simple, non interrupt dependent timer */
timeout = 0;
AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF));
AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
if (timeout >= AT91C_DATAFLASH_TIMEOUT){
return AT91C_DATAFLASH_ERROR;
}
return AT91C_DATAFLASH_OK;
}
/*----------------------------------------------------------------------*/
/* \fn AT91F_DataFlashSendCommand */
/* \brief Generic function to send a command to the dataflash */
/*----------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
AT91PS_DataFlash pDataFlash,
unsigned char OpCode,
unsigned int CmdSize,
unsigned int DataflashAddress)
{
unsigned int adr;
/* process the address to obtain page address and byte address */
adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size))
<< pDataFlash->pDevice->page_offset) +
(DataflashAddress % (pDataFlash->pDevice->pages_size));
/* fill the command buffer */
pDataFlash->pDataFlashDesc->command[0] = OpCode;
if (pDataFlash->pDevice->pages_number >= 16384)
{
pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x0F000000) >> 24);
pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x00FF0000) >> 16);
pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((adr & 0x0000FF00) >> 8);
pDataFlash->pDataFlashDesc->command[4] = (unsigned char)(adr & 0x000000FF);
}
else
{
pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x00FF0000) >> 16);
pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x0000FF00) >> 8);
pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(adr & 0x000000FF) ;
pDataFlash->pDataFlashDesc->command[4] = 0;
}
pDataFlash->pDataFlashDesc->command[5] = 0;
pDataFlash->pDataFlashDesc->command[6] = 0;
pDataFlash->pDataFlashDesc->command[7] = 0;
/* Initialize the SpiData structure for the spi write fuction */
pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize ;
pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize ;
return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
}
/*----------------------------------------------------------------------*/
/* \fn AT91F_DataFlashGetStatus */
/* \brief Read the status register of the dataflash */
/*----------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
{
AT91S_DataFlashStatus status;
/* first send the read status command (D7H) */
pDesc->command[0] = DB_STATUS;
pDesc->command[1] = 0;
pDesc->DataFlash_state = GET_STATUS;
pDesc->tx_data_size = 0 ; /* Transmit the command and receive response */
pDesc->tx_cmd_pt = pDesc->command ;
pDesc->rx_cmd_pt = pDesc->command ;
pDesc->rx_cmd_size = 2 ;
pDesc->tx_cmd_size = 2 ;
status = AT91F_SpiWrite (pDesc);
pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
return status;
}
/*-----------------------------------------------------------------------------
* Function Name : AT91F_DataFlashWaitReady
* Object : wait for dataflash ready (bit7 of the status register == 1)
* Input Parameters : DataFlash Service and timeout
* Return value : DataFlash status "ready or not"
*-----------------------------------------------------------------------------
*/
static AT91S_DataFlashStatus AT91F_DataFlashWaitReady(
AT91PS_DataflashDesc pDataFlashDesc,
unsigned int timeout)
{
pDataFlashDesc->DataFlash_state = IDLE;
do {
AT91F_DataFlashGetStatus(pDataFlashDesc);
timeout--;
}
while(((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0));
if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
return AT91C_DATAFLASH_ERROR;
return AT91C_DATAFLASH_OK;
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_DataFlashContinuousRead */
/* Object : Continuous stream Read */
/* Input Parameters : DataFlash Service */
/* : <src> = dataflash address */
/* : <*dataBuffer> = data buffer pointer */
/* : <sizeToRead> = data buffer size */
/* Return value : State of the dataflash */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_DataFlashContinuousRead(
AT91PS_DataFlash pDataFlash,
int src,
unsigned char *dataBuffer,
int sizeToRead )
{
AT91S_DataFlashStatus status;
/* Test the size to read in the device */
if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
return AT91C_DATAFLASH_MEMORY_OVERFLOW;
pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
status = AT91F_DataFlashSendCommand(pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
/* Send the command to the dataflash */
return(status);
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_MainMemoryToBufferTransfer */
/* Object : Read a page in the SRAM Buffer 1 or 2 */
/* Input Parameters : DataFlash Service */
/* : Page concerned */
/* : */
/* Return value : State of the dataflash */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfer(
AT91PS_DataFlash pDataFlash,
unsigned char BufferCommand,
unsigned int page)
{
int cmdsize;
/* Test if the buffer command is legal */
if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
return AT91C_DATAFLASH_BAD_COMMAND;
/* no data to transmit or receive */
pDataFlash->pDataFlashDesc->tx_data_size = 0;
cmdsize = 4;
if (pDataFlash->pDevice->pages_number >= 16384)
cmdsize = 5;
return(AT91F_DataFlashSendCommand(pDataFlash, BufferCommand, cmdsize,
page*pDataFlash->pDevice->pages_size));
}
/*----------------------------------------------------------------------------- */
/* Function Name : AT91F_DataFlashWriteBuffer */
/* Object : Write data to the internal sram buffer 1 or 2 */
/* Input Parameters : DataFlash Service */
/* : <BufferCommand> = command to write buffer1 or buffer2 */
/* : <*dataBuffer> = data buffer to write */
/* : <bufferAddress> = address in the internal buffer */
/* : <SizeToWrite> = data buffer size */
/* Return value : State of the dataflash */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer(
AT91PS_DataFlash pDataFlash,
unsigned char BufferCommand,
unsigned char *dataBuffer,
unsigned int bufferAddress,
int SizeToWrite )
{
int cmdsize;
/* Test if the buffer command is legal */
if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
return AT91C_DATAFLASH_BAD_COMMAND;
/* buffer address must be lower than page size */
if (bufferAddress > pDataFlash->pDevice->pages_size)
return AT91C_DATAFLASH_BAD_ADDRESS;
/* Send first Write Command */
pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
pDataFlash->pDataFlashDesc->command[1] = 0;
if (pDataFlash->pDevice->pages_number >= 16384)
{
pDataFlash->pDataFlashDesc->command[2] = 0;
pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
pDataFlash->pDataFlashDesc->command[4] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
cmdsize = 5;
}
else
{
pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
pDataFlash->pDataFlashDesc->command[4] = 0;
cmdsize = 4;
}
pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
pDataFlash->pDataFlashDesc->tx_cmd_size = cmdsize ;
pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
pDataFlash->pDataFlashDesc->rx_cmd_size = cmdsize ;
pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_PageErase */
/* Object : Read a page in the SRAM Buffer 1 or 2 */
/* Input Parameters : DataFlash Service */
/* : Page concerned */
/* : */
/* Return value : State of the dataflash */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_PageErase(
AT91PS_DataFlash pDataFlash,
unsigned int page)
{
int cmdsize;
/* Test if the buffer command is legal */
/* no data to transmit or receive */
pDataFlash->pDataFlashDesc->tx_data_size = 0;
cmdsize = 4;
if (pDataFlash->pDevice->pages_number >= 16384)
cmdsize = 5;
return(AT91F_DataFlashSendCommand(pDataFlash, DB_PAGE_ERASE, cmdsize,
page*pDataFlash->pDevice->pages_size));
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_WriteBufferToMain */
/* Object : Write buffer to the main memory */
/* Input Parameters : DataFlash Service */
/* : <BufferCommand> = command to send to buf1 or buf2 */
/* : <dest> = main memory address */
/* Return value : State of the dataflash */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_WriteBufferToMain (
AT91PS_DataFlash pDataFlash,
unsigned char BufferCommand,
unsigned int dest )
{
int cmdsize;
/* Test if the buffer command is correct */
if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
(BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
(BufferCommand != DB_BUF2_PAGE_PGM) &&
(BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
return AT91C_DATAFLASH_BAD_COMMAND;
/* no data to transmit or receive */
pDataFlash->pDataFlashDesc->tx_data_size = 0;
cmdsize = 4;
if (pDataFlash->pDevice->pages_number >= 16384)
cmdsize = 5;
/* Send the command to the dataflash */
return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize, dest));
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_PartialPageWrite */
/* Object : Erase partially a page */
/* Input Parameters : <page> = page number */
/* : <AdrInpage> = adr to begin the fading */
/* : <length> = Number of bytes to erase */
/*------------------------------------------------------------------------------*/
static AT91S_DataFlashStatus AT91F_PartialPageWrite (
AT91PS_DataFlash pDataFlash,
unsigned char *src,
unsigned int dest,
unsigned int size)
{
unsigned int page;
unsigned int AdrInPage;
page = dest / (pDataFlash->pDevice->pages_size);
AdrInPage = dest % (pDataFlash->pDevice->pages_size);
/* Read the contents of the page in the Sram Buffer */
AT91F_MainMemoryToBufferTransfer(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
/*Update the SRAM buffer */
AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
/* Erase page if a 128 Mbits device */
if (pDataFlash->pDevice->pages_number >= 16384)
{
AT91F_PageErase(pDataFlash, page);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
}
/* Rewrite the modified Sram Buffer in the main memory */
return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM,
(page*pDataFlash->pDevice->pages_size)));
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_DataFlashWrite */
/* Object : */
/* Input Parameters : <*src> = Source buffer */
/* : <dest> = dataflash adress */
/* : <size> = data buffer size */
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashWrite(
AT91PS_DataFlash pDataFlash,
unsigned char *src,
int dest,
int size )
{
unsigned int length;
unsigned int page;
unsigned int status;
AT91F_SpiEnable(pDataFlash->pDevice->cs);
if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
return AT91C_DATAFLASH_MEMORY_OVERFLOW;
/* If destination does not fit a page start address */
if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
if (size < length)
length = size;
if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
return AT91C_DATAFLASH_ERROR;
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
/* Update size, source and destination pointers */
size -= length;
dest += length;
src += length;
}
while (( size - pDataFlash->pDevice->pages_size ) >= 0 )
{
/* program dataflash page */
page = (unsigned int)dest / (pDataFlash->pDevice->pages_size);
status = AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src,
0, pDataFlash->pDevice->pages_size);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
status = AT91F_PageErase(pDataFlash, page);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
if (!status)
return AT91C_DATAFLASH_ERROR;
status = AT91F_WriteBufferToMain (pDataFlash, DB_BUF1_PAGE_PGM, dest);
if(!status)
return AT91C_DATAFLASH_ERROR;
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
/* Update size, source and destination pointers */
size -= pDataFlash->pDevice->pages_size ;
dest += pDataFlash->pDevice->pages_size ;
src += pDataFlash->pDevice->pages_size ;
}
/* If still some bytes to read */
if ( size > 0 ) {
/* program dataflash page */
if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
return AT91C_DATAFLASH_ERROR;
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
}
return AT91C_DATAFLASH_OK;
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_DataFlashRead */
/* Object : Read a block in dataflash */
/* Input Parameters : */
/* Return value : */
/*------------------------------------------------------------------------------*/
int AT91F_DataFlashRead(
AT91PS_DataFlash pDataFlash,
unsigned long addr,
unsigned long size,
char *buffer)
{
unsigned long SizeToRead;
AT91F_SpiEnable(pDataFlash->pDevice->cs);
if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT) != AT91C_DATAFLASH_OK)
return -1;
while (size)
{
SizeToRead = (size < 0x8000)? size:0x8000;
if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT)
!= AT91C_DATAFLASH_OK)
return -1;
if (AT91F_DataFlashContinuousRead (pDataFlash, addr, (unsigned char *)buffer,
SizeToRead) != AT91C_DATAFLASH_OK)
return -1;
size -= SizeToRead;
addr += SizeToRead;
buffer += SizeToRead;
}
return AT91C_DATAFLASH_OK;
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_DataflashProbe */
/* Object : */
/* Input Parameters : */
/* Return value : Dataflash status register */
/*------------------------------------------------------------------------------*/
int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
{
AT91F_SpiEnable(cs);
AT91F_DataFlashGetStatus(pDesc);
return ((pDesc->command[1] == 0xFF)? 0: (pDesc->command[1] & 0x3C));
}
/*------------------------------------------------------------------------------*/
/* Function Name : AT91F_DataFlashErase */
/* Object : */
/* Input Parameters : <*pDataFlash> = Device info */
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashErase(AT91PS_DataFlash pDataFlash)
{
unsigned int page;
unsigned int status;
AT91F_SpiEnable(pDataFlash->pDevice->cs);
for(page=0; page < pDataFlash->pDevice->pages_number; page++)
{
/* Erase dataflash page */
if ((page & 0x00FF) == 0)
printf("\rERA %d/%d", page, pDataFlash->pDevice->pages_number);
status = AT91F_PageErase(pDataFlash, page);
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT);
if (!status)
return AT91C_DATAFLASH_ERROR;
}
return AT91C_DATAFLASH_OK;
}
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