76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/****************************************************************************
|
|
* boards/arm/lpc17xx_40xx/lpc4088-devkit/src/lpc17_40_nandinitialize.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <debug.h>
|
|
|
|
#include <arch/board/board.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "lpc4088-devkit.h"
|
|
|
|
#if defined(CONFIG_LPC17_40_EMC) && defined(CONFIG_LPC17_40_EXTNAND)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: lpc4088_devkit_nand_initialize
|
|
*
|
|
* Description:
|
|
* Initialize NAND FLASH
|
|
*
|
|
****************************************************************************/
|
|
|
|
void lpc4088_devkit_nand_initialize(void)
|
|
{
|
|
uint32_t regval;
|
|
|
|
/* Set the memory width and byte lanes */
|
|
|
|
regval = getreg32(LPC17_40_EMC_STATICCONFIG1);
|
|
regval &= ~EMC_STATICCONFIG_MW_MASK;
|
|
regbal |= (EMC_STATICCONFIG_MW_8BIT | EMC_STATICCONFIG_PB);
|
|
putreg32(regval, LPC17_40_EMC_STATICCONFIG1);
|
|
|
|
/* Configure timing */
|
|
|
|
putreg32(2, LPC17_40_EMC_STATICWAITWEN1);
|
|
putreg32(2, LPC17_40_EMC_STATICWAITOEN1);
|
|
putreg32(31, LPC17_40_EMC_STATICWAITRD1);
|
|
putreg32(31, LPC17_40_EMC_STATICWAITPAGE1);
|
|
putreg32(31, LPC17_40_EMC_STATICWAITWR1);
|
|
putreg32(31, LPC17_40_EMC_STATICWAITTURN1);
|
|
|
|
/* GPIO P2[21] connects to the Ready/Busy pin of the NAND part. We need to
|
|
* reconfigure this pin as normal GPIO input.
|
|
*/
|
|
|
|
lpc17_40_gpioconfig(GPIO_NAND_RB);
|
|
}
|
|
|
|
#endif /* CONFIG_LPC17_40_EMC && CONFIG_LPC17_40_EXTNAND */
|