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8bde7f776c
- remove trailing white space, trailing empty lines, C++ comments, etc.
- split cmd_boot.c (separate cmd_bdinfo.c and cmd_load.c)
* Patches by Kenneth Johansson, 25 Jun 2003:
- major rework of command structure
(work done mostly by Michal Cendrowski and Joakim Kristiansen)
518 lines
19 KiB
C
518 lines
19 KiB
C
/* Driver for ATMEL DataFlash support
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* Author : Hamid Ikdoumi (Atmel)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*/
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#include <config.h>
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#include <common.h>
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#include <asm/hardware.h>
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#ifdef CONFIG_HAS_DATAFLASH
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#include <dataflash.h>
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#define SPI_CLK 5000000
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#define AT91C_SPI_PCS0_SERIAL_DATAFLASH 0xE /* Chip Select 0 : NPCS0 %1110 */
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#define AT91C_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3 : NPCS3 %0111 */
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void AT91F_SpiInit(void) {
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/*-------------------------------------------------------------------*/
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/* SPI DataFlash Init */
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/*-------------------------------------------------------------------*/
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/* Configure PIOs */
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AT91C_BASE_PIOA->PIO_ASR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
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AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
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AT91C_BASE_PIOA->PIO_PDR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
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AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
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/* Enable CLock */
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
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/* Reset the SPI */
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AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
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/* Configure SPI in Master Mode with No CS selected !!! */
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AT91C_BASE_SPI->SPI_MR = AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS;
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/* Configure CS0 and CS3 */
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*(AT91C_SPI_CSR + 0) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);
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*(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);
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}
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void AT91F_SpiEnable(int cs) {
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switch(cs) {
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case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
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AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
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AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS0_SERIAL_DATAFLASH<<16) & AT91C_SPI_PCS);
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break;
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case 3: /* Configure SPI CS3 for Serial DataFlash Card */
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/* Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard */
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AT91C_BASE_PIOB->PIO_PER = AT91C_PIO_PB7; /* Set in PIO mode */
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AT91C_BASE_PIOB->PIO_OER = AT91C_PIO_PB7; /* Configure in output */
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/* Clear Output */
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AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
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/* Configure PCS */
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AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
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AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
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break;
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}
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/* SPI_Enable */
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AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
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}
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/*----------------------------------------------------------------------------*/
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/* \fn AT91F_SpiWrite */
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/* \brief Set the PDC registers for a transfert */
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/*----------------------------------------------------------------------------*/
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unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
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{
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unsigned int timeout;
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pDesc->state = BUSY;
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AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
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/* Initialize the Transmit and Receive Pointer */
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AT91C_BASE_SPI->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt ;
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AT91C_BASE_SPI->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt ;
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/* Intialize the Transmit and Receive Counters */
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AT91C_BASE_SPI->SPI_RCR = pDesc->rx_cmd_size;
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AT91C_BASE_SPI->SPI_TCR = pDesc->tx_cmd_size;
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if ( pDesc->tx_data_size != 0 ) {
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/* Initialize the Next Transmit and Next Receive Pointer */
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AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
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AT91C_BASE_SPI->SPI_TNPR = (unsigned int)pDesc->tx_data_pt ;
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/* Intialize the Next Transmit and Next Receive Counters */
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AT91C_BASE_SPI->SPI_RNCR = pDesc->rx_data_size ;
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AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
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}
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/* arm simple, non interrupt dependent timer */
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reset_timer_masked();
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timeout = 0;
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AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
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while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF) && ((timeout = get_timer_masked() ) < CFG_SPI_WRITE_TOUT));
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AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
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pDesc->state = IDLE;
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if (timeout >= CFG_SPI_WRITE_TOUT){
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printf("Error Timeout\n\r");
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return DATAFLASH_ERROR;
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}
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return DATAFLASH_OK;
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}
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/*----------------------------------------------------------------------*/
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/* \fn AT91F_DataFlashSendCommand */
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/* \brief Generic function to send a command to the dataflash */
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/*----------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
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AT91PS_DataFlash pDataFlash,
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unsigned char OpCode,
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unsigned int CmdSize,
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unsigned int DataflashAddress)
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{
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unsigned int adr;
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if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
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return DATAFLASH_BUSY;
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/* process the address to obtain page address and byte address */
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adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) << pDataFlash->pDevice->page_offset) + (DataflashAddress % (pDataFlash->pDevice->pages_size));
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/* fill the command buffer */
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pDataFlash->pDataFlashDesc->command[0] = OpCode;
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pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x00FF0000) >> 16);
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pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x0000FF00) >> 8);
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pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(adr & 0x000000FF) ;
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pDataFlash->pDataFlashDesc->command[4] = 0;
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pDataFlash->pDataFlashDesc->command[5] = 0;
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pDataFlash->pDataFlashDesc->command[6] = 0;
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pDataFlash->pDataFlashDesc->command[7] = 0;
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/* Initialize the SpiData structure for the spi write fuction */
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pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
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pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize ;
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pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
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pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize ;
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/* send the command and read the data */
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return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
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}
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/*----------------------------------------------------------------------*/
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/* \fn AT91F_DataFlashGetStatus */
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/* \brief Read the status register of the dataflash */
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/*----------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
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{
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AT91S_DataFlashStatus status;
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/* if a transfert is in progress ==> return 0 */
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if( (pDesc->state) != IDLE)
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return DATAFLASH_BUSY;
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/* first send the read status command (D7H) */
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pDesc->command[0] = DB_STATUS;
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pDesc->command[1] = 0;
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pDesc->DataFlash_state = GET_STATUS;
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pDesc->tx_data_size = 0 ; /* Transmit the command and receive response */
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pDesc->tx_cmd_pt = pDesc->command ;
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pDesc->rx_cmd_pt = pDesc->command ;
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pDesc->rx_cmd_size = 2 ;
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pDesc->tx_cmd_size = 2 ;
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status = AT91F_SpiWrite (pDesc);
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pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
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return status;
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}
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/*----------------------------------------------------------------------*/
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/* \fn AT91F_DataFlashWaitReady */
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/* \brief wait for dataflash ready (bit7 of the status register == 1) */
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/*----------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
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{
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pDataFlashDesc->DataFlash_state = IDLE;
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do {
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AT91F_DataFlashGetStatus(pDataFlashDesc);
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timeout--;
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}
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while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0) );
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if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
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return DATAFLASH_ERROR;
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return DATAFLASH_OK;
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_DataFlashContinuousRead */
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/* Object : Continuous stream Read */
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/* Input Parameters : DataFlash Service */
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/* : <src> = dataflash address */
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/* : <*dataBuffer> = data buffer pointer */
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/* : <sizeToRead> = data buffer size */
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/* Return value : State of the dataflash */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
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AT91PS_DataFlash pDataFlash,
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int src,
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unsigned char *dataBuffer,
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int sizeToRead )
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{
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/* Test the size to read in the device */
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if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
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return DATAFLASH_MEMORY_OVERFLOW;
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pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
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pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
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pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
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pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
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/* Send the command to the dataflash */
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return(AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_DataFlashPagePgmBuf */
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/* Object : Main memory page program through buffer 1 or buffer 2 */
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/* Input Parameters : DataFlash Service */
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/* : <*src> = Source buffer */
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/* : <dest> = dataflash destination address */
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/* : <SizeToWrite> = data buffer size */
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/* Return value : State of the dataflash */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
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AT91PS_DataFlash pDataFlash,
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unsigned char *src,
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unsigned int dest,
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unsigned int SizeToWrite)
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{
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pDataFlash->pDataFlashDesc->tx_data_pt = src ;
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pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
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pDataFlash->pDataFlashDesc->rx_data_pt = src;
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pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
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/* Send the command to the dataflash */
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return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, 4, dest));
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_MainMemoryToBufferTransfert */
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/* Object : Read a page in the SRAM Buffer 1 or 2 */
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/* Input Parameters : DataFlash Service */
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/* : Page concerned */
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/* : */
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/* Return value : State of the dataflash */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
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AT91PS_DataFlash pDataFlash,
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unsigned char BufferCommand,
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unsigned int page)
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{
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/* Test if the buffer command is legal */
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if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
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return DATAFLASH_BAD_COMMAND;
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/* no data to transmit or receive */
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pDataFlash->pDataFlashDesc->tx_data_size = 0;
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return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, page*pDataFlash->pDevice->pages_size));
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}
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/*----------------------------------------------------------------------------- */
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/* Function Name : AT91F_DataFlashWriteBuffer */
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/* Object : Write data to the internal sram buffer 1 or 2 */
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/* Input Parameters : DataFlash Service */
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/* : <BufferCommand> = command to write buffer1 or buffer2 */
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/* : <*dataBuffer> = data buffer to write */
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/* : <bufferAddress> = address in the internal buffer */
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/* : <SizeToWrite> = data buffer size */
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/* Return value : State of the dataflash */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
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AT91PS_DataFlash pDataFlash,
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unsigned char BufferCommand,
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unsigned char *dataBuffer,
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unsigned int bufferAddress,
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int SizeToWrite )
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{
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/* Test if the buffer command is legal */
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if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
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return DATAFLASH_BAD_COMMAND;
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/* buffer address must be lower than page size */
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if (bufferAddress > pDataFlash->pDevice->pages_size)
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return DATAFLASH_BAD_ADDRESS;
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if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
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return DATAFLASH_BUSY;
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/* Send first Write Command */
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pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
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pDataFlash->pDataFlashDesc->command[1] = 0;
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pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
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pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
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pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
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pDataFlash->pDataFlashDesc->tx_cmd_size = 4 ;
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pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
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pDataFlash->pDataFlashDesc->rx_cmd_size = 4 ;
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pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
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pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
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pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
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pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
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return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_WriteBufferToMain */
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/* Object : Write buffer to the main memory */
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/* Input Parameters : DataFlash Service */
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/* : <BufferCommand> = command to send to buffer1 or buffer2 */
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/* : <dest> = main memory address */
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/* Return value : State of the dataflash */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_WriteBufferToMain (
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AT91PS_DataFlash pDataFlash,
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unsigned char BufferCommand,
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unsigned int dest )
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{
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/* Test if the buffer command is correct */
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if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
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(BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
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(BufferCommand != DB_BUF2_PAGE_PGM) &&
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(BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
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return DATAFLASH_BAD_COMMAND;
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/* no data to transmit or receive */
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pDataFlash->pDataFlashDesc->tx_data_size = 0;
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/* Send the command to the dataflash */
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return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, dest));
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_PartialPageWrite */
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/* Object : Erase partielly a page */
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/* Input Parameters : <page> = page number */
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/* : <AdrInpage> = adr to begin the fading */
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/* : <length> = Number of bytes to erase */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_PartialPageWrite (
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AT91PS_DataFlash pDataFlash,
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unsigned char *src,
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unsigned int dest,
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unsigned int size)
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{
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unsigned int page;
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unsigned int AdrInPage;
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page = dest / (pDataFlash->pDevice->pages_size);
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AdrInPage = dest % (pDataFlash->pDevice->pages_size);
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/* Read the contents of the page in the Sram Buffer */
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AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
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AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
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/*Update the SRAM buffer */
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AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
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AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
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/* Rewrite the modified Sram Buffer in the main memory */
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return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM, (page*pDataFlash->pDevice->pages_size)));
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}
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/*------------------------------------------------------------------------------*/
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/* Function Name : AT91F_DataFlashWrite_Overloaded */
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/* Object : */
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/* Input Parameters : <*src> = Source buffer */
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/* : <dest> = dataflash adress */
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/* : <size> = data buffer size */
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/*------------------------------------------------------------------------------*/
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AT91S_DataFlashStatus AT91F_DataFlashWrite(
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AT91PS_DataFlash pDataFlash,
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unsigned char *src,
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int dest,
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int size )
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{
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unsigned int length;
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AT91F_SpiEnable(pDataFlash->pDevice->cs);
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if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
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return DATAFLASH_MEMORY_OVERFLOW;
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/* If destination does not fit a page start address */
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if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
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length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
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if (size < length)
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length = size;
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if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
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return DATAFLASH_ERROR;
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AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
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/* Update size, source and destination pointers */
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size -= length;
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|
dest += length;
|
|
src += length;
|
|
}
|
|
|
|
while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
|
|
/* program dataflash page */
|
|
if(!AT91F_DataFlashPagePgmBuf(pDataFlash, src, dest, pDataFlash->pDevice->pages_size ))
|
|
return DATAFLASH_ERROR;
|
|
|
|
AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
|
|
|
|
/* 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, 1000);
|
|
}
|
|
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, 1000) != DATAFLASH_OK)
|
|
return -1;
|
|
|
|
while (size) {
|
|
SizeToRead = (size < 0x8000)? size:0x8000;
|
|
|
|
if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != 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
|