mirror of
https://github.com/u-boot/u-boot.git
synced 2024-11-26 13:44:29 +08:00
70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/*
|
|
* (C) Copyright 2008
|
|
* Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de
|
|
*
|
|
* 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 <config.h>
|
|
#if defined(CONFIG_CMD_NAND)
|
|
#include <asm/ppc4xx-gpio.h>
|
|
#include <asm/io.h>
|
|
#include <nand.h>
|
|
|
|
/*
|
|
* hardware specific access to control-lines
|
|
*/
|
|
static void quad100hd_hwcontrol(struct mtd_info *mtd,
|
|
int cmd, unsigned int ctrl)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
|
gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE));
|
|
gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE));
|
|
gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE));
|
|
}
|
|
|
|
if (cmd != NAND_CMD_NONE)
|
|
writeb(cmd, this->IO_ADDR_W);
|
|
}
|
|
|
|
static int quad100hd_nand_ready(struct mtd_info *mtd)
|
|
{
|
|
return gpio_read_in_bit(CONFIG_SYS_NAND_RDY);
|
|
}
|
|
|
|
/*
|
|
* Main initialization routine
|
|
*/
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
/* Set address of hardware control function */
|
|
nand->cmd_ctrl = quad100hd_hwcontrol;
|
|
nand->dev_ready = quad100hd_nand_ready;
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
/* 15 us command delay time */
|
|
nand->chip_delay = 20;
|
|
|
|
/* Return happy */
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_CMD_NAND */
|