mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 07:34:31 +00:00
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/*
|
|
* Copyright 2008 Extreme Engineering Solutions, Inc.
|
|
*
|
|
* This driver support NAND devices which have address lines
|
|
* connected as ALE and CLE inputs.
|
|
*
|
|
* 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 <nand.h>
|
|
#include <asm/io.h>
|
|
|
|
/*
|
|
* Hardware specific access to control-lines
|
|
*/
|
|
static void nand_addr_hwcontrol(struct mtd_info *mtd, int cmd, uint ctrl)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
ulong IO_ADDR_W;
|
|
|
|
if (ctrl & NAND_CTRL_CHANGE) {
|
|
IO_ADDR_W = (ulong)this->IO_ADDR_W;
|
|
|
|
IO_ADDR_W &= ~(CONFIG_SYS_NAND_ACTL_CLE |
|
|
CONFIG_SYS_NAND_ACTL_ALE |
|
|
CONFIG_SYS_NAND_ACTL_NCE);
|
|
if (ctrl & NAND_CLE)
|
|
IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_CLE;
|
|
if (ctrl & NAND_ALE)
|
|
IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_ALE;
|
|
if (ctrl & NAND_NCE)
|
|
IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_NCE;
|
|
|
|
this->IO_ADDR_W = (void *)IO_ADDR_W;
|
|
}
|
|
|
|
if (cmd != NAND_CMD_NONE)
|
|
writeb(cmd, this->IO_ADDR_W);
|
|
}
|
|
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
nand->cmd_ctrl = nand_addr_hwcontrol;
|
|
nand->chip_delay = CONFIG_SYS_NAND_ACTL_DELAY;
|
|
|
|
return 0;
|
|
}
|