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Matthias Fuchse09f7ab2007-07-09 10:10:04 +02001/*
2 * (C) Copyright 2007
3 * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24#include <common.h>
25
Stefan Roeseb706d632007-08-15 21:06:27 +020026#if defined(CONFIG_CMD_NAND)
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020027#include <asm/io.h>
28#include <nand.h>
29
30/*
31 * hardware specific access to control-lines
32 */
William Juulcfa460a2007-10-31 13:53:06 +010033static void esd405ep_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020034{
William Juul5e1dae52007-11-09 13:32:30 +010035 struct nand_chip *this = mtd->priv;
36 if (ctrl & NAND_CTRL_CHANGE) {
William Juulcfa460a2007-10-31 13:53:06 +010037 if ( ctrl & NAND_CLE )
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020038 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CLE);
William Juulcfa460a2007-10-31 13:53:06 +010039 else
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020040 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CLE);
William Juulcfa460a2007-10-31 13:53:06 +010041 if ( ctrl & NAND_ALE )
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020042 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_ALE);
William Juulcfa460a2007-10-31 13:53:06 +010043 else
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020044 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_ALE);
William Juulcfa460a2007-10-31 13:53:06 +010045 if ( ctrl & NAND_NCE )
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020046 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CE);
William Juulcfa460a2007-10-31 13:53:06 +010047 else
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020048 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020049 }
William Juulcfa460a2007-10-31 13:53:06 +010050
William Juul5e1dae52007-11-09 13:32:30 +010051 if (cmd != NAND_CMD_NONE)
William Juulcfa460a2007-10-31 13:53:06 +010052 writeb(cmd, this->IO_ADDR_W);
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020053}
54
55
56/*
57 * read device ready pin
58 */
59static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo)
60{
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020061 if (in_be32((void *)GPIO0_IR) & CONFIG_SYS_NAND_RDY)
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020062 return 1;
63 return 0;
64}
65
66
67int board_nand_init(struct nand_chip *nand)
68{
69 /*
70 * Set NAND-FLASH GPIO signals to defaults
71 */
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020072 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE));
73 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020074
75 /*
76 * Initialize nand_chip structure
77 */
William Juulcfa460a2007-10-31 13:53:06 +010078 nand->cmd_ctrl = esd405ep_nand_hwcontrol;
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020079 nand->dev_ready = esd405ep_nand_device_ready;
William Juulcfa460a2007-10-31 13:53:06 +010080 nand->ecc.mode = NAND_ECC_SOFT;
Matthias Fuchse09f7ab2007-07-09 10:10:04 +020081 nand->chip_delay = NAND_BIG_DELAY_US;
82 nand->options = NAND_SAMSUNG_LP_OPTIONS;
83 return 0;
84}
Stefan Roeseb706d632007-08-15 21:06:27 +020085#endif