diff options
Diffstat (limited to 'target/linux/at91-2.6/image/dfboot/src/at45.c')
| -rw-r--r-- | target/linux/at91-2.6/image/dfboot/src/at45.c | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/target/linux/at91-2.6/image/dfboot/src/at45.c b/target/linux/at91-2.6/image/dfboot/src/at45.c new file mode 100644 index 0000000..8830d7e --- /dev/null +++ b/target/linux/at91-2.6/image/dfboot/src/at45.c @@ -0,0 +1,595 @@ +/*---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support - ROUSSET - + *---------------------------------------------------------------------------- + * The software is delivered "AS IS" without warranty or condition of any + * kind, either express, implied or statutory. This includes without + * limitation any warranty or condition with respect to merchantability or + * fitness for any particular purpose, or against the infringements of + * intellectual property rights of others. + *---------------------------------------------------------------------------- + * File Name : at45c.h + * Object : + * + * 1.0 10/12/03 HIi : Creation. + * 1.01 03/05/04 HIi : Bug Fix in AT91F_DataFlashWaitReady() Function. + *---------------------------------------------------------------------------- + */ +#include "config.h" +#include "stdio.h" +#include "AT91RM9200.h" +#include "lib_AT91RM9200.h" +#include "dataflash.h" +#include "main.h" + + +/*----------------------------------------------------------------------------*/ +/* \fn AT91F_SpiInit */ +/* \brief SPI Low level Init */ +/*----------------------------------------------------------------------------*/ +void AT91F_SpiInit(void) { + /* 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); +} + + +/*----------------------------------------------------------------------------*/ +/* \fn AT91F_SpiEnable */ +/* \brief Enable SPI chip select */ +/*----------------------------------------------------------------------------*/ +static 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 */ +/*----------------------------------------------------------------------------*/ +static unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc) +{ + unsigned int timeout; + + 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 */ + timeout = 0; + + AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN; + while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF)); + + AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS; + + if (timeout >= AT91C_DATAFLASH_TIMEOUT){ + return AT91C_DATAFLASH_ERROR; + } + + return AT91C_DATAFLASH_OK; +} + + +/*----------------------------------------------------------------------*/ +/* \fn AT91F_DataFlashSendCommand */ +/* \brief Generic function to send a command to the dataflash */ +/*----------------------------------------------------------------------*/ +static AT91S_DataFlashStatus AT91F_DataFlashSendCommand( + AT91PS_DataFlash pDataFlash, + unsigned char OpCode, + unsigned int CmdSize, + unsigned int DataflashAddress) +{ + unsigned int adr; + + /* 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 ; + + return AT91F_SpiWrite(pDataFlash->pDataFlashDesc); +} + + +/*----------------------------------------------------------------------*/ +/* \fn AT91F_DataFlashGetStatus */ +/* \brief Read the status register of the dataflash */ +/*----------------------------------------------------------------------*/ +static AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc) +{ + AT91S_DataFlashStatus status; + + /* 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; +} + +/*----------------------------------------------------------------------------- + * Function Name : AT91F_DataFlashWaitReady + * Object : wait for dataflash ready (bit7 of the status register == 1) + * Input Parameters : DataFlash Service and timeout + * Return value : DataFlash status "ready or not" + *----------------------------------------------------------------------------- + */ +static 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 AT91C_DATAFLASH_ERROR; + + return AT91C_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 */ +/*------------------------------------------------------------------------------*/ +static 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 AT91C_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_MainMemoryToBufferTransfer */ +/* Object : Read a page in the SRAM Buffer 1 or 2 */ +/* Input Parameters : DataFlash Service */ +/* : Page concerned */ +/* : */ +/* Return value : State of the dataflash */ +/*------------------------------------------------------------------------------*/ +static AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfer( + 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 AT91C_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 */ +/*------------------------------------------------------------------------------*/ +static 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 AT91C_DATAFLASH_BAD_COMMAND; + + /* buffer address must be lower than page size */ + if (bufferAddress > pDataFlash->pDevice->pages_size) + return AT91C_DATAFLASH_BAD_ADDRESS; + + /* 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 : Read a page in the SRAM Buffer 1 or 2 */ +/* Input Parameters : DataFlash Service */ +/* : Page concerned */ +/* : */ +/* Return value : State of the dataflash */ +/*------------------------------------------------------------------------------*/ +static 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_WriteBufferToMain */ +/* Object : Write buffer to the main memory */ +/* Input Parameters : DataFlash Service */ +/* : <BufferCommand> = command to send to buf1 or buf2 */ +/* : <dest> = main memory address */ +/* Return value : State of the dataflash */ +/*------------------------------------------------------------------------------*/ +static 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 AT91C_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 partially a page */ +/* Input Parameters : <page> = page number */ +/* : <AdrInpage> = adr to begin the fading */ +/* : <length> = Number of bytes to erase */ +/*------------------------------------------------------------------------------*/ +static 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_MainMemoryToBufferTransfer(pDataFlash, DB_PAGE_2_BUF1_TRF, page); + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + + /*Update the SRAM buffer */ + AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size); + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + + /* Erase page if a 128 Mbits device */ + if (pDataFlash->pDevice->pages_number >= 16384) + { + AT91F_PageErase(pDataFlash, page); + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + } + + /* 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 AT91C_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 AT91C_DATAFLASH_ERROR; + + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + + /* 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_DATAFLASH_TIMEOUT); + + status = AT91F_PageErase(pDataFlash, page); + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + if (!status) + return AT91C_DATAFLASH_ERROR; + + status = AT91F_WriteBufferToMain (pDataFlash, DB_BUF1_PAGE_PGM, dest); + if(!status) + return AT91C_DATAFLASH_ERROR; + + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + + /* 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 AT91C_DATAFLASH_ERROR; + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + } + return AT91C_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_DATAFLASH_TIMEOUT) != AT91C_DATAFLASH_OK) + return -1; + + while (size) + { + SizeToRead = (size < 0x8000)? size:0x8000; + + if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT) + != AT91C_DATAFLASH_OK) + return -1; + + if (AT91F_DataFlashContinuousRead (pDataFlash, addr, (unsigned char *)buffer, + SizeToRead) != AT91C_DATAFLASH_OK) + return -1; + + size -= SizeToRead; + addr += SizeToRead; + buffer += SizeToRead; + } + + return AT91C_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)); +} + +/*------------------------------------------------------------------------------*/ +/* Function Name : AT91F_DataFlashErase */ +/* Object : */ +/* Input Parameters : <*pDataFlash> = Device info */ +/*------------------------------------------------------------------------------*/ +AT91S_DataFlashStatus AT91F_DataFlashErase(AT91PS_DataFlash pDataFlash) +{ + unsigned int page; + unsigned int status; + + AT91F_SpiEnable(pDataFlash->pDevice->cs); + + for(page=0; page < pDataFlash->pDevice->pages_number; page++) + { + /* Erase dataflash page */ + if ((page & 0x00FF) == 0) + printf("\rERA %d/%d", page, pDataFlash->pDevice->pages_number); + status = AT91F_PageErase(pDataFlash, page); + AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_DATAFLASH_TIMEOUT); + if (!status) + return AT91C_DATAFLASH_ERROR; + } + + return AT91C_DATAFLASH_OK; +} + |