diff options
Diffstat (limited to 'u-boot/board/esd/common/esd405ep_nand.c')
| -rw-r--r-- | u-boot/board/esd/common/esd405ep_nand.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/u-boot/board/esd/common/esd405ep_nand.c b/u-boot/board/esd/common/esd405ep_nand.c new file mode 100644 index 0000000..736176f --- /dev/null +++ b/u-boot/board/esd/common/esd405ep_nand.c @@ -0,0 +1,85 @@ +/* + * (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 *mtd, int cmd, unsigned int ctrl) +{ + struct nand_chip *this = mtd->priv; + if (ctrl & NAND_CTRL_CHANGE) { + if ( ctrl & NAND_CLE ) + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CLE); + else + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CLE); + if ( ctrl & NAND_ALE ) + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_ALE); + else + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_ALE); + if ( ctrl & NAND_NCE ) + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CE); + else + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE); + } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); +} + + +/* + * read device ready pin + */ +static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo) +{ + if (in_be32((void *)GPIO0_IR) & CONFIG_SYS_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) & ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE)); + out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE); + + /* + * Initialize nand_chip structure + */ + nand->cmd_ctrl = esd405ep_nand_hwcontrol; + nand->dev_ready = esd405ep_nand_device_ready; + nand->ecc.mode = NAND_ECC_SOFT; + nand->chip_delay = NAND_BIG_DELAY_US; + nand->options = NAND_SAMSUNG_LP_OPTIONS; + return 0; +} +#endif |