Add the files.

1 files changed, 550 insertions, 0 deletions

diff --git a/drivers/at45.c b/drivers/at45.c
new file mode 100644
index 0000000..35c9ecc
--- /dev/null
+++ b/drivers/at45.c
@@ -0,0 +1,550 @@
+/* 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>
+
+
+#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;
+}
+
+