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/*
* (C) Copyright 2007-2008
* Stelian Pop <stelian.pop@leadtechdesign.com>
* Lead Tech Design <www.leadtechdesign.com>
*
* (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
*
* 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 <asm/arch/at91sam9261.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91_pio.h>
#include <nand.h>
/*
* hardware specific access to control-lines
*/
#define MASK_ALE (1 << 22) /* our ALE is AD22 */
#define MASK_CLE (1 << 21) /* our CLE is AD21 */
static void at91sam9261ek_nand_hwcontrol(struct mtd_info *mtd,
int cmd, unsigned int ctrl)
{
struct nand_chip *this = mtd->priv;
if (ctrl & NAND_CTRL_CHANGE) {
ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
IO_ADDR_W &= ~(MASK_ALE | MASK_CLE);
if (ctrl & NAND_CLE)
IO_ADDR_W |= MASK_CLE;
if (ctrl & NAND_ALE)
IO_ADDR_W |= MASK_ALE;
at91_set_gpio_value(AT91_PIN_PC14, !(ctrl & NAND_NCE));
this->IO_ADDR_W = (void *) IO_ADDR_W;
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
static int at91sam9261ek_nand_ready(struct mtd_info *mtd)
{
return at91_get_gpio_value(AT91_PIN_PC15);
}
int board_nand_init(struct nand_chip *nand)
{
nand->ecc.mode = NAND_ECC_SOFT;
#ifdef CFG_NAND_DBW_16
nand->options = NAND_BUSWIDTH_16;
#endif
nand->cmd_ctrl = at91sam9261ek_nand_hwcontrol;
nand->dev_ready = at91sam9261ek_nand_ready;
nand->chip_delay = 20;
return 0;
}
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