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/****************************************************************************
* configs/sama5d4-ek/src/sam_nandflash.c
*
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Most of this file derives from Atmel sample code for the SAMA4D4-EK
* board. That sample code has licensing that is compatible with the NuttX
* modified BSD license:
*
* Copyright (c) 2012, Atmel Corporation
* All rights reserved.
*
* 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 Atmel 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/mount.h>
#include <stdbool.h>
#include <stdint.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/mtd/mtd.h>
#include <nuttx/fs/nxffs.h>
#include "up_arch.h"
#include "sam_periphclks.h"
#include "sam_pio.h"
#include "sam_nand.h"
#include "chip/sam_hsmc.h"
#include "chip/sam_pinmap.h"
#include "sama5d4-ek.h"
#ifdef CONFIG_SAMA5_EBICS3_NAND
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_nandflash_config
*
* Description:
* If CONFIG_SAMA5_EBICS3_NAND 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.
*
* Input Parameters:
* cs - Chip select number (in the event that multiple NAND devices
* are connected on-board).
*
* Returned Values:
* 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)
{
uint32_t regval;
/* The Embest and Ronetix CM boards and one Hynix NAND HY27UF(08/16)2G2B
* Series NAND (MT29F2G08ABAEAWP). This part has a capacity of 256Mx8bit
* () with spare 8Mx8 bit capacity. The device contains 2048 blocks, composed
* by 64 x 2112 byte pages. The effective size is approximately 256MiB.
*
* NAND is available on CS3.
*/
if (cs == HSMC_CS3)
{
/* Make sure that the SMC peripheral is enabled. */
sam_hsmc_enableclk();
/* Configure the SMC */
regval = HSMC_SETUP_NWE_SETUP(1) | HSMC_SETUP_NCS_WRSETUP(1) |
HSMC_SETUP_NRD_SETUP(2) | HSMC_SETUP_NCS_RDSETUP(1);
putreg32(regval, SAM_HSMC_SETUP(HSMC_CS3));
regval = HSMC_PULSE_NWE_PULSE(5) | HSMC_PULSE_NCS_WRPULSE(7) |
HSMC_PULSE_NRD_PULSE(5) | HSMC_PULSE_NCS_RDPULSE(7);
putreg32(regval, SAM_HSMC_PULSE(HSMC_CS3));
regval = HSMC_CYCLE_NWE_CYCLE(8) | HSMC_CYCLE_NRD_CYCLE(9);
putreg32(regval, SAM_HSMC_CYCLE(HSMC_CS3));
regval = HSMC_TIMINGS_TCLR(3) | HSMC_TIMINGS_TADL(10) |
HSMC_TIMINGS_TAR(3) | HSMC_TIMINGS_TRR(4) |
HSMC_TIMINGS_TWB(5) | HSMC_TIMINGS_RBNSEL(3) |
HSMC_TIMINGS_NFSEL;
putreg32(regval, SAM_HSMC_TIMINGS(HSMC_CS3));
regval = HSMC_MODE_READMODE | HSMC_MODE_WRITEMODE |
HSMC_MODE_BIT_8 | HSMC_MODE_TDFCYCLES(1);
putreg32(regval, SAM_HSMC_MODE(HSMC_CS3));
/* Configure NAND PIO pins
*
* NAND Interface:
*
* NCS3/NANDCE - Dedicated pin; no configuration needed
* NANDCLE - PE21
* NANDALE - PE22
* NRD/NANDOE - Dedicated pin; no configuration needed
* NWE/NANDWE - Dedicated pin; no configuration needed
* NANDRDY - Dedicated pin; no configuration needed
* M_EBI_D0-7 - Dedicated pins; no configuration needed
*/
sam_configpio(PIO_HSMC_NANDALE);
sam_configpio(PIO_HSMC_NANDCLE);
return OK;
}
return -ENODEV;
}
/****************************************************************************
* Name: sam_nand_automount
*
* Description:
* Initialize and configure the NAND on CS3
*
****************************************************************************/
#ifdef HAVE_NAND
int sam_nand_automount(int minor)
{
FAR struct mtd_dev_s *mtd;
static bool initialized = false;
int ret;
/* Have we already initialized? */
if (!initialized)
{
/* Create and initialize an NAND MATD device */
mtd = sam_nand_initialize(HSMC_CS3);
if (!mtd)
{
fdbg("ERROR: Failed to create the NAND driver on CS%d\n", HSMC_CS3);
return -ENODEV;
}
#if defined(CONFIG_SAMA5D4EK_NAND_FTL)
/* Use the FTL layer to wrap the MTD driver as a block driver */
ret = ftl_initialize(NAND_MINOR, mtd);
if (ret < 0)
{
fdbg("ERROR: Failed to initialize the FTL layer: %d\n", ret);
return ret;
}
#elif defined(CONFIG_SAMA5D4EK_NAND_NXFFS)
/* Initialize to provide NXFFS on the MTD interface */
ret = nxffs_initialize(mtd);
if (ret < 0)
{
fdbg("ERROR: NXFFS initialization failed: %d\n", ret);
return ret;
}
/* Mount the file system at /mnt/nand */
ret = mount(NULL, "/mnt/nand", "nxffs", 0, NULL);
if (ret < 0)
{
fdbg("ERROR: Failed to mount the NXFFS volume: %d\n", errno);
return ret;
}
#endif
/* Now we are initialized */
initialized = true;
}
return OK;
}
#endif
#endif /* CONFIG_SAMA5_EBICS3_NAND */
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