drivers/mtd : move mtd drivers to drivers/mtd

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 562 insertions, 0 deletions

diff --git a/drivers/mtd/at45.c b/drivers/mtd/at45.c
new file mode 100644
index 0000000..dac987a
--- /dev/null
+++ b/drivers/mtd/at45.c
@@ -0,0 +1,562 @@
+/* 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>
+
+#ifdef CONFIG_HAS_DATAFLASH
+#include <dataflash.h>
+
+/*
+ * spi.c API
+ */
+extern unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc);
+extern void AT91F_SpiEnable(int cs);
+
+#define AT91C_TIMEOUT_WRDY			200000
+
+/*----------------------------------------------------------------------*/
+/* \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 thru 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 2    */
+/*                     : <*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,
+						(uchar *) 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