diff options
Diffstat (limited to 'nuttx/configs/stm3210e-eval/src/up_selectnor.c')
| -rw-r--r-- | nuttx/configs/stm3210e-eval/src/up_selectnor.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/configs/stm3210e-eval/src/up_selectnor.c b/nuttx/configs/stm3210e-eval/src/up_selectnor.c new file mode 100644 index 000000000..0cc4be8dd --- /dev/null +++ b/nuttx/configs/stm3210e-eval/src/up_selectnor.c @@ -0,0 +1,137 @@ +/************************************************************************************ + * configs/stm3210e-eval/src/up_selectnor.c + * arch/arm/src/board/up_selectnor.c + * + * Copyright (C) 2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************************************/ + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <debug.h> + +#include "up_arch.h" +#include "stm32_fsmc.h" +#include "stm32_gpio.h" +#include "stm3210e-internal.h" + +#ifdef CONFIG_STM32_FSMC + +/************************************************************************************ + * Pre-processor Definitions + ************************************************************************************/ + +#if STM32_NGPIO_PORTS < 6 +# error "Required GPIO ports not enabled" +#endif + +/************************************************************************************ + * Private Data + ************************************************************************************/ + +/* Pin Usage (per schematic) + * FLASH SRAM NAND + * D[0..15] [0..15] [0..15] [0..7] + * A[0..23] [0..22] [0..18] [16,17] + * PSMC_NE3 PG10 OUT ~CE --- --- + * PSMC_NBL0 PE0 OUT ~BLE --- --- + * PSMC_NBL1 PE1 OUT ~BHE --- --- + * PSMC_NE2 PG9 OUT --- ~E --- + * PSMC_NWE PD5 OUT ~WE ~W ~W + * PSMC_NOE PD4 OUT ~OE ~G ~R + * PSMC_NWAIT PD6 IN --- R~B --- + * PSMC_INT2 PG6* IN --- --- R~B + * + * *JP7 will switch to PD6 + */ + +/* GPIO configurations unique to NOR Flash */ + +static const uint16 g_norconfig[] = +{ + /* A19... A22 */ + + GPIO_NPS_A19, GPIO_NPS_A20, GPIO_NPS_A21, GPIO_NPS_A22, + + /* NE2 */ + + GPIO_NPS_NE2 +}; +#define NNOR_CONFIG (sizeof(g_norconfig)/sizeof(uint16)) + +/************************************************************************************ + * Private Functions + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: stm32_selectnor + * + * Description: + * Initialize to access NOR flash + * + ************************************************************************************/ + +void stm32_selectnor(void) +{ + /* Configure new GPIO state */ + + stm32_extmemgpios(g_commonconfig, NCOMMON_CONFIG); + stm32_extmemgpios(g_norconfig, NNOR_CONFIG); + + /* Enable AHB clocking to the FSMC */ + + stm32_enablefsmc(); + + /* Bank1 NOR/SRAM control register configuration */ + + putreg32(FSMC_BCR_NOR|FSMC_BCR_FACCEN|FSMC_BCR_MWID16|FSMC_BCR_WREN, STM32_FSMC_BCR2); + + /* Bank1 NOR/SRAM timing register configuration */ + + putreg32(FSMC_BTR_ADDSET(3)|FSMC_BTR_ADDHLD(1)|FSMC_BTR_DATAST(6)|FSMC_BTR_BUSTRUN(1)| + FSMC_BTR_CLKDIV(1)|FSMC_BTR_DATLAT(2)|FSMC_BTR_ACCMODB, STM32_FSMC_BTR2); + + putreg32(0x0fffffff, STM32_FSMC_BCR3); + + /* Enable the bank */ + + putreg32(FSMC_BCR_MBKEN|FSMC_BCR_NOR|FSMC_BCR_FACCEN|FSMC_BCR_MWID16|FSMC_BCR_WREN, STM32_FSMC_BCR2); +} +#endif /* CONFIG_STM32_FSMC */ |