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/*
* (C) Copyright 2009
* Marvell Semiconductor <www.marvell.com>
* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
*
* 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/io.h>
#include <asm/arch/kirkwood.h>
#include <nand.h>
/* NAND Flash Soc registers */
struct kwnandf_registers {
u32 rd_params; /* 0x10418 */
u32 wr_param; /* 0x1041c */
u8 pad[0x10470 - 0x1041c - 4];
u32 ctrl; /* 0x10470 */
};
static struct kwnandf_registers *nf_reg =
(struct kwnandf_registers *)KW_NANDF_BASE;
/*
* hardware specific access to control-lines/bits
*/
#define NAND_ACTCEBOOT_BIT 0x02
static void kw_nand_hwcontrol(struct mtd_info *mtd, int cmd,
unsigned int ctrl)
{
struct nand_chip *nc = mtd->priv;
u32 offs;
if (cmd == NAND_CMD_NONE)
return;
if (ctrl & NAND_CLE)
offs = (1 << 0); /* Commands with A[1:0] == 01 */
else if (ctrl & NAND_ALE)
offs = (1 << 1); /* Addresses with A[1:0] == 10 */
else
return;
writeb(cmd, nc->IO_ADDR_W + offs);
}
void kw_nand_select_chip(struct mtd_info *mtd, int chip)
{
u32 data;
data = readl(&nf_reg->ctrl);
data |= NAND_ACTCEBOOT_BIT;
writel(data, &nf_reg->ctrl);
}
int board_nand_init(struct nand_chip *nand)
{
nand->options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING;
#if defined(CONFIG_NAND_ECC_BCH)
nand->ecc.mode = NAND_ECC_SOFT_BCH;
#else
nand->ecc.mode = NAND_ECC_SOFT;
#endif
nand->cmd_ctrl = kw_nand_hwcontrol;
nand->chip_delay = 40;
nand->select_chip = kw_nand_select_chip;
return 0;
}
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