| Stelian Pop | d99a8ff | 2008-05-08 20:52:22 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * (C) Copyright 2007-2008 |
| 3 | * Stelian Pop <stelian.pop@leadtechdesign.com> |
| 4 | * Lead Tech Design <www.leadtechdesign.com> |
| 5 | * |
| 6 | * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas |
| 7 | * |
| 8 | * See file CREDITS for list of people who contributed to this |
| 9 | * project. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2 of |
| 14 | * the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 24 | * MA 02111-1307 USA |
| 25 | */ |
| 26 | |
| 27 | #include <common.h> |
| 28 | #include <asm/arch/at91sam9261.h> |
| 29 | #include <asm/arch/gpio.h> |
| 30 | #include <asm/arch/at91_pio.h> |
| 31 | |
| 32 | #include <nand.h> |
| 33 | |
| 34 | /* |
| 35 | * hardware specific access to control-lines |
| 36 | */ |
| 37 | #define MASK_ALE (1 << 22) /* our ALE is AD22 */ |
| 38 | #define MASK_CLE (1 << 21) /* our CLE is AD21 */ |
| 39 | |
| 40 | static void at91sam9261ek_nand_hwcontrol(struct mtd_info *mtd, int cmd) |
| 41 | { |
| 42 | struct nand_chip *this = mtd->priv; |
| 43 | ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; |
| 44 | |
| 45 | IO_ADDR_W &= ~(MASK_ALE|MASK_CLE); |
| 46 | switch (cmd) { |
| 47 | case NAND_CTL_SETCLE: |
| 48 | IO_ADDR_W |= MASK_CLE; |
| 49 | break; |
| 50 | case NAND_CTL_SETALE: |
| 51 | IO_ADDR_W |= MASK_ALE; |
| 52 | break; |
| 53 | case NAND_CTL_CLRNCE: |
| 54 | at91_set_gpio_value(AT91_PIN_PC14, 1); |
| 55 | break; |
| 56 | case NAND_CTL_SETNCE: |
| 57 | at91_set_gpio_value(AT91_PIN_PC14, 0); |
| 58 | break; |
| 59 | } |
| 60 | this->IO_ADDR_W = (void *) IO_ADDR_W; |
| 61 | } |
| 62 | |
| 63 | static int at91sam9261ek_nand_ready(struct mtd_info *mtd) |
| 64 | { |
| 65 | return at91_get_gpio_value(AT91_PIN_PC15); |
| 66 | } |
| 67 | |
| 68 | int board_nand_init(struct nand_chip *nand) |
| 69 | { |
| 70 | nand->eccmode = NAND_ECC_SOFT; |
| 71 | #ifdef CFG_NAND_DBW_16 |
| 72 | nand->options = NAND_BUSWIDTH_16; |
| 73 | #endif |
| 74 | nand->hwcontrol = at91sam9261ek_nand_hwcontrol; |
| 75 | nand->dev_ready = at91sam9261ek_nand_ready; |
| 76 | nand->chip_delay = 20; |
| 77 | |
| 78 | return 0; |
| 79 | } |