| Matthias Fuchs | e09f7ab | 2007-07-09 10:10:04 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2007 |
| 3 | * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com |
| 4 | * |
| 5 | * See file CREDITS for list of people who contributed to this |
| 6 | * project. |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU General Public License as |
| 10 | * published by the Free Software Foundation; either version 2 of |
| 11 | * the License, or (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, write to the Free Software |
| 20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 21 | * MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | #include <common.h> |
| 25 | |
| 26 | #if (CONFIG_COMMANDS & CFG_CMD_NAND) |
| 27 | #include <asm/io.h> |
| 28 | #include <nand.h> |
| 29 | |
| 30 | /* |
| 31 | * hardware specific access to control-lines |
| 32 | */ |
| 33 | static void esd405ep_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd) |
| 34 | { |
| 35 | switch(cmd) { |
| 36 | case NAND_CTL_SETCLE: |
| 37 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CLE); |
| 38 | break; |
| 39 | case NAND_CTL_CLRCLE: |
| 40 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CLE); |
| 41 | break; |
| 42 | case NAND_CTL_SETALE: |
| 43 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_ALE); |
| 44 | break; |
| 45 | case NAND_CTL_CLRALE: |
| 46 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_ALE); |
| 47 | break; |
| 48 | case NAND_CTL_SETNCE: |
| 49 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CFG_NAND_CE); |
| 50 | break; |
| 51 | case NAND_CTL_CLRNCE: |
| 52 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE); |
| 53 | break; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | |
| 58 | /* |
| 59 | * read device ready pin |
| 60 | */ |
| 61 | static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo) |
| 62 | { |
| 63 | if (in_be32((void *)GPIO0_IR) & CFG_NAND_RDY) |
| 64 | return 1; |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | int board_nand_init(struct nand_chip *nand) |
| 70 | { |
| 71 | /* |
| 72 | * Set NAND-FLASH GPIO signals to defaults |
| 73 | */ |
| 74 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CFG_NAND_CLE | CFG_NAND_ALE)); |
| 75 | out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CFG_NAND_CE); |
| 76 | |
| 77 | /* |
| 78 | * Initialize nand_chip structure |
| 79 | */ |
| 80 | nand->hwcontrol = esd405ep_nand_hwcontrol; |
| 81 | nand->dev_ready = esd405ep_nand_device_ready; |
| 82 | nand->eccmode = NAND_ECC_SOFT; |
| 83 | nand->chip_delay = NAND_BIG_DELAY_US; |
| 84 | nand->options = NAND_SAMSUNG_LP_OPTIONS; |
| 85 | return 0; |
| 86 | } |
| 87 | #endif /* (CONFIG_COMMANDS & CFG_CMD_NAND) */ |