| Gary Jennejohn | 73ccb34 | 2008-04-28 14:04:32 +0200 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2008 |
| 3 | * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de |
| 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 | #include <config.h> |
| 26 | #if defined(CONFIG_CMD_NAND) |
| 27 | #include <asm/gpio.h> |
| 28 | #include <nand.h> |
| 29 | |
| 30 | /* |
| 31 | * hardware specific access to control-lines |
| 32 | */ |
| 33 | static void quad100hd_hwcontrol(struct mtd_info *mtd, int cmd) |
| 34 | { |
| 35 | switch(cmd) { |
| 36 | case NAND_CTL_SETCLE: |
| 37 | gpio_write_bit(CFG_NAND_CLE, 1); |
| 38 | break; |
| 39 | case NAND_CTL_CLRCLE: |
| 40 | gpio_write_bit(CFG_NAND_CLE, 0); |
| 41 | break; |
| 42 | |
| 43 | case NAND_CTL_SETALE: |
| 44 | gpio_write_bit(CFG_NAND_ALE, 1); |
| 45 | break; |
| 46 | case NAND_CTL_CLRALE: |
| 47 | gpio_write_bit(CFG_NAND_ALE, 0); |
| 48 | break; |
| 49 | |
| 50 | case NAND_CTL_SETNCE: |
| 51 | gpio_write_bit(CFG_NAND_CE, 0); |
| 52 | break; |
| 53 | case NAND_CTL_CLRNCE: |
| 54 | gpio_write_bit(CFG_NAND_CE, 1); |
| 55 | break; |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | static int quad100hd_nand_ready(struct mtd_info *mtd) |
| 60 | { |
| 61 | return gpio_read_in_bit(CFG_NAND_RDY); |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * Main initialization routine |
| 66 | */ |
| 67 | int board_nand_init(struct nand_chip *nand) |
| 68 | { |
| 69 | /* Set address of hardware control function */ |
| 70 | nand->hwcontrol = quad100hd_hwcontrol; |
| 71 | nand->dev_ready = quad100hd_nand_ready; |
| 72 | nand->eccmode = NAND_ECC_SOFT; |
| 73 | /* 15 us command delay time */ |
| 74 | nand->chip_delay = 20; |
| 75 | |
| 76 | /* Return happy */ |
| 77 | return 0; |
| 78 | } |
| 79 | #endif /* CONFIG_CMD_NAND */ |