diff options
Diffstat (limited to 'cpu/arm926ejs/at91cap9/spi.c')
| -rw-r--r-- | cpu/arm926ejs/at91cap9/spi.c | 119 |
1 files changed, 0 insertions, 119 deletions
diff --git a/cpu/arm926ejs/at91cap9/spi.c b/cpu/arm926ejs/at91cap9/spi.c deleted file mode 100644 index 0953820..0000000 --- a/cpu/arm926ejs/at91cap9/spi.c +++ /dev/null @@ -1,119 +0,0 @@ -/* - * 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> - -/* Max Value = 10MHz to be compliant to the Continuous Array Read function */ -#define AT91C_SPI_CLK 10000000 - -/* AC Characteristics: DLYBS = tCSS = 250ns min and DLYBCT = tCSH = 250ns */ -#define DATAFLASH_TCSS (0xFA << 16) -#define DATAFLASH_TCHS (0x8 << 24) - -#define AT91C_TIMEOUT_WRDY 200000 -#define AT91C_SPI_PCS0_DATAFLASH_CARD 0xE /* Chip Select 0: NPCS0%1110 */ -#define AT91C_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3: NPCS3%0111 */ - -void AT91F_SpiInit(void) -{ - /* Reset the SPI */ - AT91C_BASE_SPI0->SPI_CR = AT91C_SPI_SWRST; - - /* Configure SPI in Master Mode with No CS selected !!! */ - AT91C_BASE_SPI0->SPI_MR = - AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS; - - /* Configure CS0 */ - AT91C_BASE_SPI0->SPI_CSR[0] = - 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_SPI0->SPI_MR &= 0xFFF0FFFF; - AT91C_BASE_SPI0->SPI_MR |= - ((AT91C_SPI_PCS0_DATAFLASH_CARD<<16) & AT91C_SPI_PCS); - break; - case 3: - AT91C_BASE_SPI0->SPI_MR &= 0xFFF0FFFF; - AT91C_BASE_SPI0->SPI_MR |= - ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS); - break; - } - - /* SPI_Enable */ - AT91C_BASE_SPI0->SPI_CR = AT91C_SPI_SPIEN; -} - -unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc) -{ - unsigned int timeout; - - pDesc->state = BUSY; - - AT91C_BASE_SPI0->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS; - - /* Initialize the Transmit and Receive Pointer */ - AT91C_BASE_SPI0->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt; - AT91C_BASE_SPI0->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt; - - /* Intialize the Transmit and Receive Counters */ - AT91C_BASE_SPI0->SPI_RCR = pDesc->rx_cmd_size; - AT91C_BASE_SPI0->SPI_TCR = pDesc->tx_cmd_size; - - if (pDesc->tx_data_size != 0) { - /* Initialize the Next Transmit and Next Receive Pointer */ - AT91C_BASE_SPI0->SPI_RNPR = (unsigned int)pDesc->rx_data_pt; - AT91C_BASE_SPI0->SPI_TNPR = (unsigned int)pDesc->tx_data_pt; - - /* Intialize the Next Transmit and Next Receive Counters */ - AT91C_BASE_SPI0->SPI_RNCR = pDesc->rx_data_size; - AT91C_BASE_SPI0->SPI_TNCR = pDesc->tx_data_size; - } - - /* arm simple, non interrupt dependent timer */ - reset_timer_masked(); - timeout = 0; - - AT91C_BASE_SPI0->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN; - while (!(AT91C_BASE_SPI0->SPI_SR & AT91C_SPI_RXBUFF) && - ((timeout = get_timer_masked()) < CFG_SPI_WRITE_TOUT)); - AT91C_BASE_SPI0->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; -} -#endif |