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/************************************************************************************
* configs/stm3210e-eval/src/up_extmem.c
* arch/arm/src/board/up_extmem.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 <stdint.h>
#include <assert.h>
#include <debug.h>
#include <arch/board/board.h>
#include "chip.h"
#include "up_arch.h"
#include "stm32_fsmc.h"
#include "stm32_gpio.h"
#include "stm32_internal.h"
#include "stm3210e-internal.h"
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
#ifndef CONFIG_STM32_FSMC
# warning "FSMC is not enabled"
#endif
#if STM32_NGPIO_PORTS < 6
# error "Required GPIO ports not enabled"
#endif
/************************************************************************************
* Public Data
************************************************************************************/
/* 512Kx16 SRAM is connected to bank2 of the FSMC interface and both 8- and 16-bit
* accesses are allowed by BLN0 and BLN1 connected to BLE and BHE of SRAM,
* respectively.
*
* Pin Usage (per schematic)
*
* FLASH SRAM NAND LCD
* D[0..15] [0..15] [0..15] [0..7] [0..15]
* A[0..23] [0..22] [0..18] [16,17] [0]
* FSMC_NBL0 PE0 OUT ~BLE --- --- ---
* FSMC_NBL1 PE1 OUT ~BHE --- --- ---
* FSMC_NE2 PG9 OUT --- ~E --- ---
* FSMC_NE3 PG10 OUT ~CE --- --- ---
* FSMC_NE4 PG12 OUT --- --- --- ~CS
* FSMC_NWE PD5 OUT ~WE ~W ~W ~WR/SCL
* FSMC_NOE PD4 OUT ~OE ~G ~R ~RD
* FSMC_NWAIT PD6 IN --- R~B --- ---
* FSMC_INT2 PG6* IN --- --- R~B ---
*
* *JP7 will switch to PD6
*/
/* It would be much more efficient to brute force these all into the
* the appropriate registers. Just a little tricky.
*/
/* GPIO configurations common to SRAM and NOR Flash */
const uint16_t g_commonconfig[NCOMMON_CONFIG] =
{
/* A0... A18 */
GPIO_NPS_A0, GPIO_NPS_A1, GPIO_NPS_A2, GPIO_NPS_A3,
GPIO_NPS_A4, GPIO_NPS_A5, GPIO_NPS_A6, GPIO_NPS_A7,
GPIO_NPS_A8, GPIO_NPS_A9, GPIO_NPS_A10, GPIO_NPS_A11,
GPIO_NPS_A12, GPIO_NPS_A13, GPIO_NPS_A14, GPIO_NPS_A15,
GPIO_NPS_A16, GPIO_NPS_A17, GPIO_NPS_A18,
/* D0... D15 */
GPIO_NPS_D0, GPIO_NPS_D1, GPIO_NPS_D2, GPIO_NPS_D3,
GPIO_NPS_D4, GPIO_NPS_D5, GPIO_NPS_D6, GPIO_NPS_D7,
GPIO_NPS_D8, GPIO_NPS_D9, GPIO_NPS_D10, GPIO_NPS_D11,
GPIO_NPS_D12, GPIO_NPS_D13, GPIO_NPS_D14, GPIO_NPS_D15,
/* NOE, NWE */
GPIO_NPS_NOE, GPIO_NPS_NWE
};
/************************************************************************************
* Private Data
************************************************************************************/
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/************************************************************************************
* Name: stm32_extmemgpios
*
* Description:
* Initialize GPIOs for NOR or SRAM
*
************************************************************************************/
void stm32_extmemgpios(const uint16_t *gpios, int ngpios)
{
int i;
/* Configure GPIOs */
for (i = 0; i < ngpios; i++)
{
stm32_configgpio(gpios[i]);
}
}
/************************************************************************************
* Name: stm32_enablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
void stm32_enablefsmc(void)
{
uint32_t regval;
/* Enable AHB clocking to the FSMC */
regval = getreg32( STM32_RCC_AHBENR);
regval |= RCC_AHBENR_FSMCEN;
putreg32(regval, STM32_RCC_AHBENR);
}
/************************************************************************************
* Name: stm32_disablefsmc
*
* Description:
* enable clocking to the FSMC module
*
************************************************************************************/
void stm32_disablefsmc(void)
{
uint32_t regval;
/* Enable AHB clocking to the FSMC */
regval = getreg32( STM32_RCC_AHBENR);
regval &= ~RCC_AHBENR_FSMCEN;
putreg32(regval, STM32_RCC_AHBENR);
}
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