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/*
* (C) Copyright 2007
* Heiko Schocher, DENX Software Engineering, hs@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>
#if defined(CONFIG_CMD_NAND)
#include <nand.h>
#include <asm/processor.h>
#define readb(addr) *(volatile u_char *)(addr)
#define readl(addr) *(volatile u_long *)(addr)
#define writeb(d,addr) *(volatile u_char *)(addr) = (d)
#define SC3_NAND_ALE 29 /* GPIO PIN 3 */
#define SC3_NAND_CLE 30 /* GPIO PIN 2 */
#define SC3_NAND_CE 27 /* GPIO PIN 5 */
static void *sc3_io_base;
static void *sc3_control_base = (void *)0xEF600700;
static void sc3_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 )
set_bit (SC3_NAND_CLE, sc3_control_base);
else
clear_bit (SC3_NAND_CLE, sc3_control_base);
if ( ctrl & NAND_ALE )
set_bit (SC3_NAND_ALE, sc3_control_base);
else
clear_bit (SC3_NAND_ALE, sc3_control_base);
if ( ctrl & NAND_NCE )
set_bit (SC3_NAND_CE, sc3_control_base);
else
clear_bit (SC3_NAND_CE, sc3_control_base);
}
if (cmd != NAND_CMD_NONE)
writeb(cmd, this->IO_ADDR_W);
}
static int sc3_nand_dev_ready(struct mtd_info *mtd)
{
if (!(readl(sc3_control_base + 0x1C) & 0x4000))
return 0;
return 1;
}
static void sc3_select_chip(struct mtd_info *mtd, int chip)
{
clear_bit (SC3_NAND_CE, sc3_control_base);
}
int board_nand_init(struct nand_chip *nand)
{
nand->ecc.mode = NAND_ECC_SOFT;
sc3_io_base = (void *) CONFIG_SYS_NAND_BASE;
/* Set address of NAND IO lines (Using Linear Data Access Region) */
nand->IO_ADDR_R = (void __iomem *) sc3_io_base;
nand->IO_ADDR_W = (void __iomem *) sc3_io_base;
/* Reference hardware control function */
nand->cmd_ctrl = sc3_nand_hwcontrol;
nand->dev_ready = sc3_nand_dev_ready;
nand->select_chip = sc3_select_chip;
return 0;
}
#endif
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