3 * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
26 #if defined(CONFIG_CMD_NAND)
31 * hardware specific access to control-lines
33 static void esd405ep_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
35 struct nand_chip *this = mtd->priv;
36 if (ctrl & NAND_CTRL_CHANGE) {
37 if ( ctrl & NAND_CLE )
38 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CLE);
40 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CLE);
41 if ( ctrl & NAND_ALE )
42 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_ALE);
44 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_ALE);
45 if ( ctrl & NAND_NCE )
46 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CE);
48 out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
51 if (cmd != NAND_CMD_NONE)
52 writeb(cmd, this->IO_ADDR_W);
57 * read device ready pin
59 static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo)
61 if (in_be32((void *)GPIO0_IR) & CONFIG_SYS_NAND_RDY)
67 int board_nand_init(struct nand_chip *nand)
70 * Set NAND-FLASH GPIO signals to defaults
72 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);
76 * Initialize nand_chip structure
78 nand->cmd_ctrl = esd405ep_nand_hwcontrol;
79 nand->dev_ready = esd405ep_nand_device_ready;
80 nand->ecc.mode = NAND_ECC_SOFT;
81 nand->chip_delay = NAND_BIG_DELAY_US;
82 nand->options = NAND_SAMSUNG_LP_OPTIONS;