180 lines
5.6 KiB
C
180 lines
5.6 KiB
C
|
/****************************************************************************
|
||
|
* arch/arm/src/sam34/sam4s_nand.h
|
||
|
*
|
||
|
* 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.
|
||
|
*
|
||
|
****************************************************************************/
|
||
|
|
||
|
#ifndef __ARCH_ARM_SRC_SAM4S_SAM_NAND_H
|
||
|
#define __ARCH_ARM_SRC_SAM4S_SAM_NAND_H
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Included Files
|
||
|
****************************************************************************/
|
||
|
|
||
|
#include <nuttx/config.h>
|
||
|
#include <nuttx/mtd/nand_config.h>
|
||
|
|
||
|
#include <stdint.h>
|
||
|
#include <stdbool.h>
|
||
|
#include <debug.h>
|
||
|
|
||
|
#include <nuttx/mtd/nand_raw.h>
|
||
|
#include <nuttx/semaphore.h>
|
||
|
|
||
|
#include "arm_arch.h"
|
||
|
#include "chip.h"
|
||
|
#include "sam_gpio.h"
|
||
|
#include "hardware/sam_smc.h"
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Pre-processor Definitions
|
||
|
****************************************************************************/
|
||
|
|
||
|
/* Only NCS0 can support NAND. The rest is a fantasy */
|
||
|
|
||
|
#if defined(CONFIG_SAM34_EXTNAND)
|
||
|
# define CONFIG_SAM34_NCS0_NAND 1
|
||
|
#else
|
||
|
# undef CONFIG_SAM34_NCS0_NAND
|
||
|
#endif
|
||
|
|
||
|
/* On-Die ECC, Requires Micron Flash to support on-die */
|
||
|
|
||
|
#define SAM34_NCS0_ECCTYPE NANDECC_NONE
|
||
|
|
||
|
#if defined(CONFIG_SAM34_NCS0_NAND)
|
||
|
# if defined(CONFIG_SAM34_NCS0_ECCNONE) ||\
|
||
|
defined(CONFIG_MTD_NAND_EMBEDDEDECC)
|
||
|
# define SAM34_NCS0_ECCTYPE NANDECC_NONE
|
||
|
# elif defined(CONFIG_MTD_NAND_SWECC)
|
||
|
# define SAM34_NCS0_ECCTYPE NANDECC_SWECC
|
||
|
# endif
|
||
|
#endif /* CONFIG_SAM34_NCS0_NAND */
|
||
|
|
||
|
/* Count the number of banks that configured for NAND with PMECC support
|
||
|
* enabled.
|
||
|
*/
|
||
|
|
||
|
#ifdef CONFIG_SAM34_NCS0_NAND
|
||
|
# define CONFIG_SAM34_HAVE_NAND 1
|
||
|
# define NAND_HAVE_NCS0 1
|
||
|
#else
|
||
|
# define NAND_HAVE_NCS0 0
|
||
|
#endif
|
||
|
|
||
|
#define MAX_READ_STATUS_COUNT 100000 /* Read status timeout */
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Public Types
|
||
|
****************************************************************************/
|
||
|
|
||
|
/* This type represents the state of a raw NAND MTD device on a single chip
|
||
|
* select. The struct nand_raw_s must appear at the beginning of the
|
||
|
* definition so that you can freely cast between pointers to struct
|
||
|
* nand_raw_s and struct sam_nandcs_s.
|
||
|
*
|
||
|
* NOTE: Currently, only SAM4S CS0 can support NAND. The logic here would
|
||
|
* support NAND on any CS, but that capability is not needed.
|
||
|
*/
|
||
|
|
||
|
struct sam_nandcs_s
|
||
|
{
|
||
|
struct nand_raw_s raw; /* Externally visible part of the driver */
|
||
|
|
||
|
/* Static configuration */
|
||
|
|
||
|
uint8_t cs; /* Chip select number (0..3) */
|
||
|
gpio_pinset_t rb; /* NAND Ready/Busy detect GPIO pin */
|
||
|
#endif
|
||
|
};
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Public Data
|
||
|
****************************************************************************/
|
||
|
|
||
|
#ifndef __ASSEMBLY__
|
||
|
|
||
|
#undef EXTERN
|
||
|
#if defined(__cplusplus)
|
||
|
#define EXTERN extern "C"
|
||
|
extern "C"
|
||
|
{
|
||
|
#else
|
||
|
#define EXTERN extern
|
||
|
#endif
|
||
|
|
||
|
/* NAND global state */
|
||
|
|
||
|
EXTERN struct sam_nand_s g_nand;
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Name: sam_nand_initialize
|
||
|
*
|
||
|
* Description:
|
||
|
* Create and initialize an raw NAND device instance. This driver
|
||
|
* implements the RAW NAND interface: No software ECC or sparing is
|
||
|
* performed here. Those necessary NAND features are provided by common,
|
||
|
* higher level NAND MTD layers found in drivers/mtd.
|
||
|
*
|
||
|
* Input Parameters:
|
||
|
* cs - Chip select number (in the event that multiple NAND devices
|
||
|
* are connected on-board).
|
||
|
*
|
||
|
* Returned Value:
|
||
|
* On success a non-NULL pointer to an MTD device structure is returned;
|
||
|
* NULL is returned on a failure.
|
||
|
*
|
||
|
****************************************************************************/
|
||
|
|
||
|
struct mtd_dev_s;
|
||
|
struct mtd_dev_s *sam_nand_initialize(int cs);
|
||
|
|
||
|
/****************************************************************************
|
||
|
* Name: board_nandflash_config
|
||
|
*
|
||
|
* Description:
|
||
|
* If CONFIG_SAM34_BOOT_CS3FLASH is defined, then NAND FLASH support is
|
||
|
* enabled. This function provides the board-specific implementation of
|
||
|
* the logic to reprogram the SMC to support NAND FLASH on the specified
|
||
|
* CS. As a minimum, this board-specific initialization should do the
|
||
|
* following:
|
||
|
*
|
||
|
* 1. Enable clocking to the HSMC
|
||
|
* 2. Configure timing for the HSMC CS
|
||
|
* 3. Configure NAND PIO pins
|
||
|
*
|
||
|
* Input Parameters:
|
||
|
* cs - Chip select number (in the event that multiple NAND devices
|
||
|
* are connected on-board).
|
||
|
*
|
||
|
* Returned Value:
|
||
|
* OK if the HSMC was successfully configured for this CS. A negated
|
||
|
* errno value is returned on a failure. This would fail with -ENODEV,
|
||
|
* for example, if the board does not support NAND FLASH on the requested
|
||
|
* CS.
|
||
|
*
|
||
|
****************************************************************************/
|
||
|
|
||
|
int board_nandflash_config(int cs);
|
||
|
|
||
|
#undef EXTERN
|
||
|
#if defined(__cplusplus)
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
#endif /* __ASSEMBLY__ */
|