| | 1 | /* |
| | 2 | * (C) Copyright 2008 |
| | 3 | * Gary Jennejohn, DENX Software Engineering GmbH, [email protected] |
| | 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 <asm/io.h> |
| | 29 | #include <nand.h> |
| | 30 | |
| | 31 | /* |
| | 32 | * hardware specific access to control-lines |
| | 33 | */ |
| | 34 | static void quad100hd_hwcontrol(struct mtd_info *mtd, |
| | 35 | int cmd, unsigned int ctrl) |
| | 36 | { |
| | 37 | struct nand_chip *this = mtd->priv; |
| | 38 | |
| | 39 | if (ctrl & NAND_CTRL_CHANGE) { |
| | 40 | gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE)); |
| | 41 | gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE)); |
| | 42 | gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE)); |
| | 43 | } |
| | 44 | |
| | 45 | if (cmd != NAND_CMD_NONE) |
| | 46 | writeb(cmd, this->IO_ADDR_W); |
| | 47 | } |
| | 48 | |
| | 49 | static int quad100hd_nand_ready(struct mtd_info *mtd) |
| | 50 | { |
| | 51 | return gpio_read_in_bit(CONFIG_SYS_NAND_RDY); |
| | 52 | } |
| | 53 | |
| | 54 | /* |
| | 55 | * Main initialization routine |
| | 56 | */ |
| | 57 | int board_nand_init(struct nand_chip *nand) |
| | 58 | { |
| | 59 | /* Set address of hardware control function */ |
| | 60 | nand->cmd_ctrl = quad100hd_hwcontrol; |
| | 61 | nand->dev_ready = quad100hd_nand_ready; |
| | 62 | nand->ecc.mode = NAND_ECC_SOFT; |
| | 63 | /* 15 us command delay time */ |
| | 64 | nand->chip_delay = 20; |
| | 65 | |
| | 66 | /* Return happy */ |
| | 67 | return 0; |
| | 68 | } |
| | 69 | #endif /* CONFIG_CMD_NAND */ |
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