3 * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de
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)
27 #include <asm/ppc4xx-gpio.h>
32 * hardware specific access to control-lines
34 static void quad100hd_hwcontrol(struct mtd_info *mtd,
35 int cmd, unsigned int ctrl)
37 struct nand_chip *this = mtd->priv;
39 if (ctrl & NAND_CTRL_CHANGE) {
40 gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE));
41 gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE));
42 gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE));
45 if (cmd != NAND_CMD_NONE)
46 writeb(cmd, this->IO_ADDR_W);
49 static int quad100hd_nand_ready(struct mtd_info *mtd)
51 return gpio_read_in_bit(CONFIG_SYS_NAND_RDY);
55 * Main initialization routine
57 int board_nand_init(struct nand_chip *nand)
59 /* Set address of hardware control function */
60 nand->cmd_ctrl = quad100hd_hwcontrol;
61 nand->dev_ready = quad100hd_nand_ready;
62 nand->ecc.mode = NAND_ECC_SOFT;
63 /* 15 us command delay time */
64 nand->chip_delay = 20;
69 #endif /* CONFIG_CMD_NAND */