[u-boot.git] / cpu / at91rm9200 / at45.c

/* Driver for ATMEL DataFlash support
 * Author : Hamid Ikdoumi (Atmel)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 *
 */

#include <config.h>
#include <common.h>
#include <asm/hardware.h>

#ifdef CONFIG_HAS_DATAFLASH
#include <dataflash.h>

#define SPI_CLK 5000000
#define AT91C_SPI_PCS0_SERIAL_DATAFLASH		0xE     /* Chip Select 0 : NPCS0 %1110 */
#define AT91C_SPI_PCS3_DATAFLASH_CARD		0x7     /* Chip Select 3 : NPCS3 %0111 */

void AT91F_SpiInit(void) {

/*-------------------------------------------------------------------*/
/*	SPI DataFlash Init								*/
/*-------------------------------------------------------------------*/
	/* 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 & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);

	*(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);

}

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				      */
/*----------------------------------------------------------------------------*/
unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
{
	unsigned int timeout;

	pDesc->state = BUSY;

	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 */
	reset_timer_masked();
	timeout = 0;

	AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
	while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF) && ((timeout = get_timer_masked() ) < CFG_SPI_WRITE_TOUT));
	AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
	pDesc->state = IDLE;

	if (timeout >= CFG_SPI_WRITE_TOUT){
		printf("Error Timeout\n\r");
		return DATAFLASH_ERROR;
	}

	return DATAFLASH_OK;
}


/*----------------------------------------------------------------------*/
/* \fn    AT91F_DataFlashSendCommand					*/
/* \brief Generic function to send a command to the dataflash		*/
/*----------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
	AT91PS_DataFlash pDataFlash,
	unsigned char OpCode,
	unsigned int CmdSize,
	unsigned int DataflashAddress)
{
    unsigned int adr;

	if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
		return DATAFLASH_BUSY;

	/* 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;
	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 ;

	/* send the command and read the data */
	return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
}


/*----------------------------------------------------------------------*/
/* \fn    AT91F_DataFlashGetStatus					*/
/* \brief Read the status register of the dataflash			*/
/*----------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
{
	AT91S_DataFlashStatus status;

	/* if a transfert is in progress ==> return 0 */
	if( (pDesc->state) != IDLE)
		return DATAFLASH_BUSY;

	/* 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;
}


/*----------------------------------------------------------------------*/
/* \fn    AT91F_DataFlashWaitReady					*/
/* \brief wait for dataflash ready (bit7 of the status register == 1)	*/
/*----------------------------------------------------------------------*/
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 DATAFLASH_ERROR;

	return 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				*/
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
	AT91PS_DataFlash pDataFlash,
	int src,
	unsigned char *dataBuffer,
	int sizeToRead )
{
	/* Test the size to read in the device */
	if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
		return 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;

	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
}


/*------------------------------------------------------------------------------*/
/* Function Name       : AT91F_DataFlashPagePgmBuf				*/
/* Object              : Main memory page program through buffer 1 or buffer 2	*/
/* Input Parameters    : DataFlash Service					*/
/*						: <*src> = Source buffer	*/
/*                     : <dest> = dataflash destination address			*/
/*                     : <SizeToWrite> = data buffer size			*/
/* Return value		: State of the dataflash				*/
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
	AT91PS_DataFlash pDataFlash,
	unsigned char *src,
	unsigned int dest,
	unsigned int SizeToWrite)
{
	pDataFlash->pDataFlashDesc->tx_data_pt = src ;
	pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
	pDataFlash->pDataFlashDesc->rx_data_pt = src;
	pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;

	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, 4, dest));
}


/*------------------------------------------------------------------------------*/
/* Function Name       : AT91F_MainMemoryToBufferTransfert			*/
/* Object              : Read a page in the SRAM Buffer 1 or 2			*/
/* Input Parameters    : DataFlash Service					*/
/*                     : Page concerned						*/
/*                     : 							*/
/* Return value		: State of the dataflash				*/
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
	AT91PS_DataFlash pDataFlash,
	unsigned char BufferCommand,
	unsigned int page)
{
	/* Test if the buffer command is legal */
	if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
		return DATAFLASH_BAD_COMMAND;

	/* no data to transmit or receive */
	pDataFlash->pDataFlashDesc->tx_data_size = 0;

	return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, 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				*/
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
	AT91PS_DataFlash pDataFlash,
	unsigned char BufferCommand,
	unsigned char *dataBuffer,
	unsigned int bufferAddress,
	int SizeToWrite )
{
	/* Test if the buffer command is legal */
	if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
		return DATAFLASH_BAD_COMMAND;

	/* buffer address must be lower than page size */
	if (bufferAddress > pDataFlash->pDevice->pages_size)
		return DATAFLASH_BAD_ADDRESS;

	if ( (pDataFlash->pDataFlashDesc->state)  != IDLE)
		return DATAFLASH_BUSY;

	/* Send first Write Command */
	pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
	pDataFlash->pDataFlashDesc->command[1] = 0;
	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->tx_cmd_pt 	 = pDataFlash->pDataFlashDesc->command ;
	pDataFlash->pDataFlashDesc->tx_cmd_size = 4 ;
	pDataFlash->pDataFlashDesc->rx_cmd_pt 	 = pDataFlash->pDataFlashDesc->command ;
	pDataFlash->pDataFlashDesc->rx_cmd_size = 4 ;

	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_WriteBufferToMain				*/
/* Object              : Write buffer to the main memory			*/
/* Input Parameters    : DataFlash Service					*/
/*		: <BufferCommand> = command to send to buffer1 or buffer2	*/
/*                     : <dest> = main memory address				*/
/* Return value		: State of the dataflash				*/
/*------------------------------------------------------------------------------*/
AT91S_DataFlashStatus AT91F_WriteBufferToMain (
	AT91PS_DataFlash pDataFlash,
	unsigned char BufferCommand,
	unsigned int dest )
{
	/* 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 DATAFLASH_BAD_COMMAND;

	/* no data to transmit or receive */
	pDataFlash->pDataFlashDesc->tx_data_size = 0;

	/* Send the command to the dataflash */
	return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, dest));
}


/*------------------------------------------------------------------------------*/
/* Function Name       : AT91F_PartialPageWrite					*/
/* Object              : Erase partielly a page					*/
/* Input Parameters    : <page> = page number					*/
/*			: <AdrInpage> = adr to begin the fading			*/
/*                     : <length> = Number of bytes to erase			*/
/*------------------------------------------------------------------------------*/
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_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	/*Update the SRAM buffer */
	AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);

	/* 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_Overloaded			*/
/* 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;

	AT91F_SpiEnable(pDataFlash->pDevice->cs);

	if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
		return 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 DATAFLASH_ERROR;

		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);

		/* Update size, source and destination pointers */
		size -= length;
		dest += length;
		src += length;
	}

	while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
		/* program dataflash page */
		if(!AT91F_DataFlashPagePgmBuf(pDataFlash, src, dest, pDataFlash->pDevice->pages_size ))
			return DATAFLASH_ERROR;

		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);

		/* 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 DATAFLASH_ERROR;

		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	}
	return 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, 1000) != DATAFLASH_OK)
		return -1;

	while (size) {
		SizeToRead = (size < 0x8000)? size:0x8000;

		if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
			return -1;

		if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
			return -1;

		size -= SizeToRead;
		addr += SizeToRead;
		buffer += SizeToRead;
	}

	return 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);
}

#endif
Commit	Line	Data
2abbe075 WD	1	/* Driver for ATMEL DataFlash support
	2	* Author : Hamid Ikdoumi (Atmel)
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License as
	6	* published by the Free Software Foundation; either version 2 of
	7	* the License, or (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	17	* MA 02111-1307 USA
	18	*
	19	*/
	20
	21	#include <config.h>
	22	#include <common.h>
	23	#include <asm/hardware.h>
	24
	25	#ifdef CONFIG_HAS_DATAFLASH
	26	#include <dataflash.h>
	27
	28	#define SPI_CLK 5000000
	29	#define AT91C_SPI_PCS0_SERIAL_DATAFLASH 0xE /* Chip Select 0 : NPCS0 %1110 */
	30	#define AT91C_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3 : NPCS3 %0111 */
	31
	32	void AT91F_SpiInit(void) {
	33
	34	/-------------------------------------------------------------------/
	35	/* SPI DataFlash Init */
	36	/-------------------------------------------------------------------/
	37	/* Configure PIOs */
	38	AT91C_BASE_PIOA->PIO_ASR = AT91C_PA3_NPCS0 \| AT91C_PA4_NPCS1 \| AT91C_PA1_MOSI \| AT91C_PA5_NPCS2 \|
	39	AT91C_PA6_NPCS3 \| AT91C_PA0_MISO \| AT91C_PA2_SPCK;
	40	AT91C_BASE_PIOA->PIO_PDR = AT91C_PA3_NPCS0 \| AT91C_PA4_NPCS1 \| AT91C_PA1_MOSI \| AT91C_PA5_NPCS2 \|
	41	AT91C_PA6_NPCS3 \| AT91C_PA0_MISO \| AT91C_PA2_SPCK;
	42	/* Enable CLock */
	43	AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
	44
	45	/* Reset the SPI */
	46	AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
	47
8bde7f77	48	/* Configure SPI in Master Mode with No CS selected !!! */
2abbe075 WD	49	AT91C_BASE_SPI->SPI_MR = AT91C_SPI_MSTR \| AT91C_SPI_MODFDIS \| AT91C_SPI_PCS;
	50
	51	/* Configure CS0 and CS3 */
	52	(AT91C_SPI_CSR + 0) = AT91C_SPI_CPOL \| (AT91C_SPI_DLYBS & 0x100000) \| ((AT91C_MASTER_CLOCK / (2SPI_CLK)) << 8);
	53
	54	(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL \| (AT91C_SPI_DLYBS & 0x100000) \| ((AT91C_MASTER_CLOCK / (2SPI_CLK)) << 8);
	55
	56	}
	57
	58	void AT91F_SpiEnable(int cs) {
	59	switch(cs) {
	60	case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
	61	AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
	62	AT91C_BASE_SPI->SPI_MR \|= ((AT91C_SPI_PCS0_SERIAL_DATAFLASH<<16) & AT91C_SPI_PCS);
	63	break;
	64	case 3: /* Configure SPI CS3 for Serial DataFlash Card */
	65	/* Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard */
	66	AT91C_BASE_PIOB->PIO_PER = AT91C_PIO_PB7; /* Set in PIO mode */
	67	AT91C_BASE_PIOB->PIO_OER = AT91C_PIO_PB7; /* Configure in output */
	68	/* Clear Output */
	69	AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
	70	/* Configure PCS */
	71	AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
	72	AT91C_BASE_SPI->SPI_MR \|= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
	73	break;
	74	}
	75
	76	/* SPI_Enable */
	77	AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
	78	}
	79
	80	/----------------------------------------------------------------------------/
	81	/* \fn AT91F_SpiWrite */
	82	/* \brief Set the PDC registers for a transfert */
	83	/----------------------------------------------------------------------------/
	84	unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
	85	{
8bde7f77	86	unsigned int timeout;
2abbe075 WD	87
	88	pDesc->state = BUSY;
	89
8bde7f77	90	AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
2abbe075	91
8bde7f77 WD	92	/* Initialize the Transmit and Receive Pointer */
	93	AT91C_BASE_SPI->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt ;
	94	AT91C_BASE_SPI->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt ;
2abbe075	95
8bde7f77 WD	96	/* Intialize the Transmit and Receive Counters */
	97	AT91C_BASE_SPI->SPI_RCR = pDesc->rx_cmd_size;
	98	AT91C_BASE_SPI->SPI_TCR = pDesc->tx_cmd_size;
2abbe075 WD	99
2abbe075 WD	100	if ( pDesc->tx_data_size != 0 ) {
8bde7f77 WD	101	/* Initialize the Next Transmit and Next Receive Pointer */
8bde7f77 WD	102	AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
2abbe075 WD	103	AT91C_BASE_SPI->SPI_TNPR = (unsigned int)pDesc->tx_data_pt ;
	104
	105	/* Intialize the Next Transmit and Next Receive Counters */
	106	AT91C_BASE_SPI->SPI_RNCR = pDesc->rx_data_size ;
8bde7f77 WD	107	AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
8bde7f77 WD	108	}
2abbe075	109
8bde7f77	110	/* arm simple, non interrupt dependent timer */
2abbe075 WD	111	reset_timer_masked();
	112	timeout = 0;
	113
	114	AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
	115	while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF) && ((timeout = get_timer_masked() ) < CFG_SPI_WRITE_TOUT));
8bde7f77 WD	116	AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
8bde7f77 WD	117	pDesc->state = IDLE;
2abbe075 WD	118
	119	if (timeout >= CFG_SPI_WRITE_TOUT){
	120	printf("Error Timeout\n\r");
	121	return DATAFLASH_ERROR;
	122	}
	123
	124	return DATAFLASH_OK;
	125	}
	126
	127
	128	/----------------------------------------------------------------------/
	129	/* \fn AT91F_DataFlashSendCommand */
	130	/* \brief Generic function to send a command to the dataflash */
	131	/----------------------------------------------------------------------/
	132	AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
	133	AT91PS_DataFlash pDataFlash,
	134	unsigned char OpCode,
	135	unsigned int CmdSize,
	136	unsigned int DataflashAddress)
	137	{
	138	unsigned int adr;
	139
	140	if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
	141	return DATAFLASH_BUSY;
	142
	143	/* process the address to obtain page address and byte address */
	144	adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) << pDataFlash->pDevice->page_offset) + (DataflashAddress % (pDataFlash->pDevice->pages_size));
	145
	146	/* fill the command buffer */
	147	pDataFlash->pDataFlashDesc->command[0] = OpCode;
	148	pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x00FF0000) >> 16);
	149	pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x0000FF00) >> 8);
	150	pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(adr & 0x000000FF) ;
	151	pDataFlash->pDataFlashDesc->command[4] = 0;
	152	pDataFlash->pDataFlashDesc->command[5] = 0;
	153	pDataFlash->pDataFlashDesc->command[6] = 0;
	154	pDataFlash->pDataFlashDesc->command[7] = 0;
	155
	156	/* Initialize the SpiData structure for the spi write fuction */
	157	pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
	158	pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize ;
	159	pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
	160	pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize ;
	161
	162	/* send the command and read the data */
	163	return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
	164	}
	165
	166
	167	/----------------------------------------------------------------------/
	168	/* \fn AT91F_DataFlashGetStatus */
	169	/* \brief Read the status register of the dataflash */
	170	/----------------------------------------------------------------------/
	171	AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
	172	{
	173	AT91S_DataFlashStatus status;
	174
	175	/* if a transfert is in progress ==> return 0 */
	176	if( (pDesc->state) != IDLE)
	177	return DATAFLASH_BUSY;
	178
	179	/* first send the read status command (D7H) */
	180	pDesc->command[0] = DB_STATUS;
	181	pDesc->command[1] = 0;
182
183	pDesc->DataFlash_state = GET_STATUS;
8bde7f77 WD	184	pDesc->tx_data_size = 0 ; /* Transmit the command and receive response */
	185	pDesc->tx_cmd_pt = pDesc->command ;
	186	pDesc->rx_cmd_pt = pDesc->command ;
	187	pDesc->rx_cmd_size = 2 ;
	188	pDesc->tx_cmd_size = 2 ;
	189	status = AT91F_SpiWrite (pDesc);
2abbe075 WD	190
	191	pDesc->DataFlash_state = ( (unsigned char ) (pDesc->rx_cmd_pt) +1);
	192
	193	return status;
	194	}
	195
	196
	197	/----------------------------------------------------------------------/
	198	/* \fn AT91F_DataFlashWaitReady */
	199	/* \brief wait for dataflash ready (bit7 of the status register == 1) */
	200	/----------------------------------------------------------------------/
	201	AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
	202	{
	203	pDataFlashDesc->DataFlash_state = IDLE;
	204
	205	do {
	206	AT91F_DataFlashGetStatus(pDataFlashDesc);
	207	timeout--;
	208	}
	209	while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0) );
	210
	211	if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
	212	return DATAFLASH_ERROR;
	213
	214	return DATAFLASH_OK;
	215	}
	216
	217
2abbe075 WD	218	/------------------------------------------------------------------------------/
	219	/* Function Name : AT91F_DataFlashContinuousRead */
	220	/* Object : Continuous stream Read */
	221	/* Input Parameters : DataFlash Service */
	222	/* : <src> = dataflash address */
	223	/* : <dataBuffer> = data buffer pointer /
	224	/* : <sizeToRead> = data buffer size */
	225	/* Return value : State of the dataflash */
	226	/------------------------------------------------------------------------------/
	227	AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
8bde7f77	228	AT91PS_DataFlash pDataFlash,
2abbe075 WD	229	int src,
	230	unsigned char *dataBuffer,
	231	int sizeToRead )
	232	{
	233	/* Test the size to read in the device */
	234	if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
	235	return DATAFLASH_MEMORY_OVERFLOW;
	236
	237	pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
	238	pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
	239	pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
	240	pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
	241
	242	/* Send the command to the dataflash */
	243	return(AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
	244	}
	245
	246
2abbe075 WD	247	/------------------------------------------------------------------------------/
	248	/* Function Name : AT91F_DataFlashPagePgmBuf */
	249	/* Object : Main memory page program through buffer 1 or buffer 2 */
	250	/* Input Parameters : DataFlash Service */
	251	/* : <src> = Source buffer /
	252	/* : <dest> = dataflash destination address */
	253	/* : <SizeToWrite> = data buffer size */
	254	/* Return value : State of the dataflash */
	255	/------------------------------------------------------------------------------/
	256	AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
	257	AT91PS_DataFlash pDataFlash,
	258	unsigned char *src,
	259	unsigned int dest,
	260	unsigned int SizeToWrite)
	261	{
	262	pDataFlash->pDataFlashDesc->tx_data_pt = src ;
	263	pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
	264	pDataFlash->pDataFlashDesc->rx_data_pt = src;
	265	pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
	266
	267	/* Send the command to the dataflash */
	268	return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, 4, dest));
	269	}
	270
	271
	272	/------------------------------------------------------------------------------/
	273	/* Function Name : AT91F_MainMemoryToBufferTransfert */
	274	/* Object : Read a page in the SRAM Buffer 1 or 2 */
	275	/* Input Parameters : DataFlash Service */
	276	/* : Page concerned */
	277	/* : */
	278	/* Return value : State of the dataflash */
	279	/------------------------------------------------------------------------------/
	280	AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
	281	AT91PS_DataFlash pDataFlash,
	282	unsigned char BufferCommand,
	283	unsigned int page)
	284	{
	285	/* Test if the buffer command is legal */
	286	if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
	287	return DATAFLASH_BAD_COMMAND;
	288
	289	/* no data to transmit or receive */
8bde7f77	290	pDataFlash->pDataFlashDesc->tx_data_size = 0;
2abbe075 WD	291
	292	return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, page*pDataFlash->pDevice->pages_size));
	293	}
	294
	295
2abbe075 WD	296	/----------------------------------------------------------------------------- /
	297	/* Function Name : AT91F_DataFlashWriteBuffer */
	298	/* Object : Write data to the internal sram buffer 1 or 2 */
	299	/* Input Parameters : DataFlash Service */
	300	/* : <BufferCommand> = command to write buffer1 or buffer2 */
	301	/* : <dataBuffer> = data buffer to write /
	302	/* : <bufferAddress> = address in the internal buffer */
	303	/* : <SizeToWrite> = data buffer size */
	304	/* Return value : State of the dataflash */
	305	/------------------------------------------------------------------------------/
	306	AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
	307	AT91PS_DataFlash pDataFlash,
	308	unsigned char BufferCommand,
	309	unsigned char *dataBuffer,
	310	unsigned int bufferAddress,
	311	int SizeToWrite )
	312	{
	313	/* Test if the buffer command is legal */
	314	if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
	315	return DATAFLASH_BAD_COMMAND;
	316
	317	/* buffer address must be lower than page size */
	318	if (bufferAddress > pDataFlash->pDevice->pages_size)
	319	return DATAFLASH_BAD_ADDRESS;
	320
	321	if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
	322	return DATAFLASH_BUSY;
	323
8bde7f77 WD	324	/* Send first Write Command */
8bde7f77 WD	325	pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
2abbe075	326	pDataFlash->pDataFlashDesc->command[1] = 0;
8bde7f77 WD	327	pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
8bde7f77 WD	328	pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
2abbe075 WD	329
2abbe075 WD	330
8bde7f77 WD	331	pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
	332	pDataFlash->pDataFlashDesc->tx_cmd_size = 4 ;
	333	pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
	334	pDataFlash->pDataFlashDesc->rx_cmd_size = 4 ;
2abbe075	335
8bde7f77 WD	336	pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
	337	pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
	338	pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
	339	pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
2abbe075	340
8bde7f77	341	return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
2abbe075 WD	342	}
	343
	344
	345	/------------------------------------------------------------------------------/
	346	/* Function Name : AT91F_WriteBufferToMain */
	347	/* Object : Write buffer to the main memory */
	348	/* Input Parameters : DataFlash Service */
	349	/* : <BufferCommand> = command to send to buffer1 or buffer2 */
	350	/* : <dest> = main memory address */
	351	/* Return value : State of the dataflash */
	352	/------------------------------------------------------------------------------/
	353	AT91S_DataFlashStatus AT91F_WriteBufferToMain (
	354	AT91PS_DataFlash pDataFlash,
	355	unsigned char BufferCommand,
	356	unsigned int dest )
	357	{
	358	/* Test if the buffer command is correct */
	359	if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
	360	(BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
	361	(BufferCommand != DB_BUF2_PAGE_PGM) &&
	362	(BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
	363	return DATAFLASH_BAD_COMMAND;
	364
	365	/* no data to transmit or receive */
	366	pDataFlash->pDataFlashDesc->tx_data_size = 0;
	367
	368	/* Send the command to the dataflash */
	369	return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, dest));
	370	}
	371
	372
	373	/------------------------------------------------------------------------------/
	374	/* Function Name : AT91F_PartialPageWrite */
	375	/* Object : Erase partielly a page */
	376	/* Input Parameters : <page> = page number */
	377	/* : <AdrInpage> = adr to begin the fading */
	378	/* : <length> = Number of bytes to erase */
	379	/------------------------------------------------------------------------------/
	380	AT91S_DataFlashStatus AT91F_PartialPageWrite (
	381	AT91PS_DataFlash pDataFlash,
	382	unsigned char *src,
	383	unsigned int dest,
	384	unsigned int size)
	385	{
	386	unsigned int page;
	387	unsigned int AdrInPage;
	388
	389	page = dest / (pDataFlash->pDevice->pages_size);
	390	AdrInPage = dest % (pDataFlash->pDevice->pages_size);
	391
	392	/* Read the contents of the page in the Sram Buffer */
	393	AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
	394	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	395	/Update the SRAM buffer /
	396	AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
	397	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	398
	399	/* Rewrite the modified Sram Buffer in the main memory */
	400	return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM, (page*pDataFlash->pDevice->pages_size)));
	401	}
	402
	403
2abbe075 WD	404	/------------------------------------------------------------------------------/
	405	/* Function Name : AT91F_DataFlashWrite_Overloaded */
	406	/* Object : */
	407	/* Input Parameters : <src> = Source buffer /
	408	/* : <dest> = dataflash adress */
	409	/* : <size> = data buffer size */
	410	/------------------------------------------------------------------------------/
	411	AT91S_DataFlashStatus AT91F_DataFlashWrite(
	412	AT91PS_DataFlash pDataFlash,
	413	unsigned char *src,
	414	int dest,
	415	int size )
	416	{
	417	unsigned int length;
	418
	419	AT91F_SpiEnable(pDataFlash->pDevice->cs);
	420
8bde7f77	421	if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
2abbe075 WD	422	return DATAFLASH_MEMORY_OVERFLOW;
2abbe075 WD	423
8bde7f77 WD	424	/* If destination does not fit a page start address */
8bde7f77 WD	425	if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
2abbe075 WD	426	length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
	427
	428	if (size < length)
	429	length = size;
	430
	431	if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
	432	return DATAFLASH_ERROR;
	433
	434	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	435
	436	/* Update size, source and destination pointers */
8bde7f77 WD	437	size -= length;
	438	dest += length;
	439	src += length;
	440	}
2abbe075	441
8bde7f77	442	while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
2abbe075 WD	443	/* program dataflash page */
	444	if(!AT91F_DataFlashPagePgmBuf(pDataFlash, src, dest, pDataFlash->pDevice->pages_size ))
	445	return DATAFLASH_ERROR;
	446
	447	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	448
	449	/* Update size, source and destination pointers */
8bde7f77 WD	450	size -= pDataFlash->pDevice->pages_size ;
	451	dest += pDataFlash->pDevice->pages_size ;
	452	src += pDataFlash->pDevice->pages_size ;
	453	}
2abbe075	454
8bde7f77 WD	455	/* If still some bytes to read */
8bde7f77 WD	456	if ( size > 0 ) {
2abbe075 WD	457	/* program dataflash page */
	458	if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
	459	return DATAFLASH_ERROR;
	460
	461	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
	462	}
8bde7f77	463	return DATAFLASH_OK;
2abbe075 WD	464	}
	465
	466
	467	/------------------------------------------------------------------------------/
	468	/* Function Name : AT91F_DataFlashRead */
	469	/* Object : Read a block in dataflash */
	470	/* Input Parameters : */
	471	/* Return value : */
	472	/------------------------------------------------------------------------------/
	473	int AT91F_DataFlashRead(
	474	AT91PS_DataFlash pDataFlash,
	475	unsigned long addr,
	476	unsigned long size,
	477	char *buffer)
	478	{
	479	unsigned long SizeToRead;
	480
	481	AT91F_SpiEnable(pDataFlash->pDevice->cs);
	482
	483	if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
	484	return -1;
	485
	486	while (size) {
	487	SizeToRead = (size < 0x8000)? size:0x8000;
	488
	489	if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
	490	return -1;
	491
	492	if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
	493	return -1;
	494
	495	size -= SizeToRead;
	496	addr += SizeToRead;
	497	buffer += SizeToRead;
	498	}
	499
8bde7f77	500	return DATAFLASH_OK;
2abbe075 WD	501	}
	502
	503
	504	/------------------------------------------------------------------------------/
	505	/* Function Name : AT91F_DataflashProbe */
	506	/* Object : */
	507	/* Input Parameters : */
	508	/* Return value : Dataflash status register */
	509	/------------------------------------------------------------------------------/
	510	int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
	511	{
	512	AT91F_SpiEnable(cs);
8bde7f77 WD	513	AT91F_DataFlashGetStatus(pDesc);
8bde7f77 WD	514	return((pDesc->command[1] == 0xFF)? 0: pDesc->command[1] & 0x3C);
2abbe075 WD	515	}
	516
	517	#endif