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/*
* (C) Copyright 2008
* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <config.h>
#if defined(CONFIG_CMD_NAND)
#include <asm/ppc4xx-gpio.h>
#include <asm/io.h>
#include <nand.h>
/*
* hardware specific access to control-lines
*/
static void quad100hd_hwcontrol(struct mtd_info *mtd,
int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE));
gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE));
gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE));
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
static int quad100hd_nand_ready(struct mtd_info *mtd)
{
return gpio_read_in_bit(CONFIG_SYS_NAND_RDY);
}
/*
* Main initialization routine
*/
int board_nand_init(struct nand_chip *nand)
{
/* Set address of hardware control function */
nand->cmd_ctrl = quad100hd_hwcontrol;
nand->dev_ready = quad100hd_nand_ready;
nand->ecc.mode = NAND_ECC_SOFT;
/* 15 us command delay time */
nand->chip_delay = 20;
/* Return happy */
return 0;
}
#endif /* CONFIG_CMD_NAND */
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