* Patch by Gary Jennejohn, 01 Oct 2004:

  - add support for CMC PU2 board
  - add support for I2C on at91rm9200

* Patch by Gary Jennejohn, 28 Sep 2004:
  fix baudrate handling on at91rm9200

1 files changed, 621 insertions, 0 deletions

diff --git a/board/cmc_pu2/at45.c b/board/cmc_pu2/at45.c
new file mode 100644
index 0000000..3c00132
--- /dev/null
+++ b/board/cmc_pu2/at45.c
@@ -0,0 +1,621 @@
+/* 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 AT91C_SPI_CLK	10000000	/* Max Value = 10MHz to be compliant to
+the Continuous Array Read function */
+
+/* AC Characteristics */
+/* DLYBS = tCSS = 250ns min and DLYBCT = tCSH = 250ns */
+#define DATAFLASH_TCSS	(0xC << 16)
+#define DATAFLASH_TCHS	(0x1 << 24)
+
+#define AT91C_TIMEOUT_WRDY			200000
+#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 & 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);
+
+}
+
+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;
+	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 ;
+
+	/* 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 )
+{
+	AT91S_DataFlashStatus status;
+	/* 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;
+
+	status = AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
+	/* Send the command to the dataflash */
+	return(status);
+}
+
+
+/*------------------------------------------------------------------------------*/
+/* 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)
+{
+	int cmdsize;
+	pDataFlash->pDataFlashDesc->tx_data_pt = src ;
+	pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
+	pDataFlash->pDataFlashDesc->rx_data_pt = src;
+	pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
+
+	cmdsize = 4;
+	/* Send the command to the dataflash */
+	if (pDataFlash->pDevice->pages_number >= 16384)
+		cmdsize = 5;
+	return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, cmdsize, 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)
+{
+	int cmdsize;
+	/* 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;
+	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				*/
+/*------------------------------------------------------------------------------*/
+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 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;
+	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              : Erase a page 						*/
+/* Input Parameters    : DataFlash Service					*/
+/*                     : Page concerned						*/
+/*                     : 							*/
+/* Return value		: State of the dataflash				*/
+/*------------------------------------------------------------------------------*/
+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_BlockErase                                       */
+/* Object              : Erase a Block 						*/
+/* Input Parameters    : DataFlash Service					*/
+/*                     : Page concerned						*/
+/*                     : 							*/
+/* Return value		: State of the dataflash				*/
+/*------------------------------------------------------------------------------*/
+AT91S_DataFlashStatus AT91F_BlockErase(
+	AT91PS_DataFlash pDataFlash,
+	unsigned int block)
+{
+	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_BLOCK_ERASE,cmdsize, block*8*pDataFlash->pDevice->pages_size));
+}
+
+/*------------------------------------------------------------------------------*/
+/* 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 )
+{
+	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 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 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, AT91C_TIMEOUT_WRDY);
+	/*Update the SRAM buffer */
+	AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
+
+	AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
+
+	/* Erase page if a 128 Mbits device */
+	if (pDataFlash->pDevice->pages_number >= 16384) {
+		AT91F_PageErase(pDataFlash, page);
+		/* Rewrite the modified Sram Buffer in the main memory */
+		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
+	}
+
+	/* 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 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, AT91C_TIMEOUT_WRDY);
+
+		/* 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_TIMEOUT_WRDY);
+
+		status = AT91F_PageErase(pDataFlash, page);
+		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
+		if (!status)
+			return DATAFLASH_ERROR;
+
+		status = AT91F_WriteBufferToMain (pDataFlash, DB_BUF1_PAGE_PGM, dest);
+		if(!status)
+			return DATAFLASH_ERROR;
+
+		AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
+
+		/* 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, AT91C_TIMEOUT_WRDY);
+	}
+	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, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
+		return -1;
+
+	while (size) {
+		SizeToRead = (size < 0x8000)? size:0x8000;
+
+		if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != 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