| 1 | /* |
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| 2 | * (C) Copyright 2007-2008 |
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| 3 | * Stelian Pop <stelian.pop@leadtechdesign.com> |
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| 4 | * Lead Tech Design <www.leadtechdesign.com> |
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| 5 | * |
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| 6 | * (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas |
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| 7 | * |
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| 8 | * See file CREDITS for list of people who contributed to this |
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| 9 | * project. |
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| 10 | * |
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| 11 | * This program is free software; you can redistribute it and/or |
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| 12 | * modify it under the terms of the GNU General Public License as |
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| 13 | * published by the Free Software Foundation; either version 2 of |
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| 14 | * the License, or (at your option) any later version. |
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| 15 | * |
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| 16 | * This program is distributed in the hope that it will be useful, |
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 19 | * GNU General Public License for more details. |
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| 20 | * |
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| 21 | * You should have received a copy of the GNU General Public License |
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| 22 | * along with this program; if not, write to the Free Software |
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| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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| 24 | * MA 02111-1307 USA |
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| 25 | */ |
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| 26 | |
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| 27 | #include <common.h> |
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| 28 | #include <asm/arch/at91sam9263.h> |
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| 29 | #include <asm/arch/gpio.h> |
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| 30 | #include <asm/arch/at91_pio.h> |
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| 31 | |
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| 32 | #include <nand.h> |
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| 33 | |
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| 34 | /* |
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| 35 | * hardware specific access to control-lines |
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| 36 | */ |
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| 37 | #define MASK_ALE (1 << 21) /* our ALE is AD21 */ |
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| 38 | #define MASK_CLE (1 << 22) /* our CLE is AD22 */ |
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| 39 | |
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| 40 | static void at91sam9263ek_nand_hwcontrol(struct mtd_info *mtd, |
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| 41 | int cmd, unsigned int ctrl) |
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| 42 | { |
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| 43 | struct nand_chip *this = mtd->priv; |
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| 44 | |
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| 45 | if (ctrl & NAND_CTRL_CHANGE) { |
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| 46 | ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; |
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| 47 | IO_ADDR_W &= ~(MASK_ALE | MASK_CLE); |
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| 48 | |
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| 49 | if (ctrl & NAND_CLE) |
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| 50 | IO_ADDR_W |= MASK_CLE; |
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| 51 | if (ctrl & NAND_ALE) |
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| 52 | IO_ADDR_W |= MASK_ALE; |
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| 53 | |
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| 54 | at91_set_gpio_value(AT91_PIN_PD15, !(ctrl & NAND_NCE)); |
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| 55 | this->IO_ADDR_W = (void *) IO_ADDR_W; |
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| 56 | } |
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| 57 | |
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| 58 | if (cmd != NAND_CMD_NONE) |
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| 59 | writeb(cmd, this->IO_ADDR_W); |
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| 60 | } |
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| 61 | |
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| 62 | static int at91sam9263ek_nand_ready(struct mtd_info *mtd) |
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| 63 | { |
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| 64 | return at91_get_gpio_value(AT91_PIN_PA22); |
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| 65 | } |
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| 66 | |
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| 67 | int board_nand_init(struct nand_chip *nand) |
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| 68 | { |
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| 69 | nand->ecc.mode = NAND_ECC_SOFT; |
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| 70 | #ifdef CFG_NAND_DBW_16 |
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| 71 | nand->options = NAND_BUSWIDTH_16; |
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| 72 | #endif |
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| 73 | nand->cmd_ctrl = at91sam9263ek_nand_hwcontrol; |
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| 74 | nand->dev_ready = at91sam9263ek_nand_ready; |
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| 75 | nand->chip_delay = 20; |
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| 76 | |
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| 77 | return 0; |
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| 78 | } |
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