+++ /dev/null
-/* 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, (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
+++ /dev/null
-/* 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
projects / u-boot / commitdiff