diff options
Diffstat (limited to 'board/esd/common/esd405ep_nand.c')
| -rw-r--r-- | board/esd/common/esd405ep_nand.c | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/board/esd/common/esd405ep_nand.c b/board/esd/common/esd405ep_nand.c new file mode 100644 index 000000000..7bf68473d --- /dev/null +++ b/board/esd/common/esd405ep_nand.c @@ -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 |