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205a0988d8
This patch adds a NAND driver for the Marvell Kirkwood SoC's Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com> Acked-by: Scott Wood <scottwood@freescale.com>
82 lines
2.1 KiB
C
82 lines
2.1 KiB
C
/*
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* (C) Copyright 2009
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* Marvell Semiconductor <www.marvell.com>
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* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/kirkwood.h>
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#include <nand.h>
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/* NAND Flash Soc registers */
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struct kwnandf_registers {
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u32 rd_params; /* 0x10418 */
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u32 wr_param; /* 0x1041c */
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u8 pad[0x10470 - 0x1041c - 4];
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u32 ctrl; /* 0x10470 */
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};
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static struct kwnandf_registers *nf_reg =
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(struct kwnandf_registers *)KW_NANDF_BASE;
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/*
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* hardware specific access to control-lines/bits
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*/
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#define NAND_ACTCEBOOT_BIT 0x02
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static void kw_nand_hwcontrol(struct mtd_info *mtd, int cmd,
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unsigned int ctrl)
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{
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struct nand_chip *nc = mtd->priv;
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u32 offs;
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if (cmd == NAND_CMD_NONE)
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return;
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if (ctrl & NAND_CLE)
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offs = (1 << 0); /* Commands with A[1:0] == 01 */
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else if (ctrl & NAND_ALE)
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offs = (1 << 1); /* Addresses with A[1:0] == 10 */
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else
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return;
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writeb(cmd, nc->IO_ADDR_W + offs);
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}
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void kw_nand_select_chip(struct mtd_info *mtd, int chip)
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{
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u32 data;
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data = readl(&nf_reg->ctrl);
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data |= NAND_ACTCEBOOT_BIT;
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writel(data, &nf_reg->ctrl);
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}
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int board_nand_init(struct nand_chip *nand)
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{
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nand->options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING;
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nand->ecc.mode = NAND_ECC_SOFT;
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nand->cmd_ctrl = kw_nand_hwcontrol;
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nand->chip_delay = 30;
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nand->select_chip = kw_nand_select_chip;
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return 0;
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}
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