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/*
* (C) Copyright 2007
* Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#if defined(CONFIG_CMD_NAND)
#include <asm/io.h>
#include <nand.h>
/*
* hardware specific access to control-lines
*/
static void esd405ep_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
if ( ctrl & NAND_CLE )
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CLE);
else
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CLE);
if ( ctrl & NAND_ALE )
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_ALE);
else
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_ALE);
if ( ctrl & NAND_NCE )
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CE);
else
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
/*
* read device ready pin
*/
static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo)
{
if (in_be32((void *)GPIO0_IR) & CONFIG_SYS_NAND_RDY)
return 1;
return 0;
}
int board_nand_init(struct nand_chip *nand)
{
/*
* Set NAND-FLASH GPIO signals to defaults
*/
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE));
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
/*
* Initialize nand_chip structure
*/
nand->cmd_ctrl = esd405ep_nand_hwcontrol;
nand->dev_ready = esd405ep_nand_device_ready;
nand->ecc.mode = NAND_ECC_SOFT;
nand->chip_delay = NAND_BIG_DELAY_US;
nand->options = NAND_SAMSUNG_LP_OPTIONS;
return 0;
}
#endif
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