commit
4a3c7eb917
@ -0,0 +1,87 @@ |
||||
/*
|
||||
* (C) Copyright 2007 |
||||
* Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com |
||||
* |
||||
* 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> |
||||
|
||||
#if defined(CONFIG_CMD_NAND) |
||||
#include <asm/io.h> |
||||
#include <nand.h> |
||||
|
||||
/*
|
||||
* hardware specific access to control-lines |
||||
*/ |
||||
static void esd405ep_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd) |
||||
{ |
||||
switch(cmd) { |
||||
case NAND_CTL_SETCLE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CLE); |
||||
break; |
||||
case NAND_CTL_CLRCLE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CLE); |
||||
break; |
||||
case NAND_CTL_SETALE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_ALE); |
||||
break; |
||||
case NAND_CTL_CLRALE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_ALE); |
||||
break; |
||||
case NAND_CTL_SETNCE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CE); |
||||
break; |
||||
case NAND_CTL_CLRNCE: |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE); |
||||
break; |
||||
} |
||||
} |
||||
|
||||
|
||||
/*
|
||||
* read device ready pin |
||||
*/ |
||||
static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo) |
||||
{ |
||||
if (in_be32((void *)GPIO0_IR) & CFG_NAND_RDY) |
||||
return 1; |
||||
return 0; |
||||
} |
||||
|
||||
|
||||
int board_nand_init(struct nand_chip *nand) |
||||
{ |
||||
/*
|
||||
* Set NAND-FLASH GPIO signals to defaults |
||||
*/ |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CFG_NAND_CLE | CFG_NAND_ALE)); |
||||
out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE); |
||||
|
||||
/*
|
||||
* Initialize nand_chip structure |
||||
*/ |
||||
nand->hwcontrol = esd405ep_nand_hwcontrol; |
||||
nand->dev_ready = esd405ep_nand_device_ready; |
||||
nand->eccmode = NAND_ECC_SOFT; |
||||
nand->chip_delay = NAND_BIG_DELAY_US; |
||||
nand->options = NAND_SAMSUNG_LP_OPTIONS; |
||||
return 0; |
||||
} |
||||
#endif |
Loading…
Reference in new issue