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rename CFG_ macros to CONFIG_SYS
[people/ms/u-boot.git] / board / atmel / at91sam9260ek / nand.c
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1/*
2 * (C) Copyright 2007-2008
567fb852 3 * Stelian Pop <stelian.pop@leadtechdesign.com>
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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/at91sam9260.h>
29#include <asm/arch/gpio.h>
30#include <asm/arch/at91_pio.h>
31
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32#include <nand.h>
33
34/*
35 * hardware specific access to control-lines
36 */
37#define MASK_ALE (1 << 21) /* our ALE is AD21 */
38#define MASK_CLE (1 << 22) /* our CLE is AD22 */
39
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40static void at91sam9260ek_nand_hwcontrol(struct mtd_info *mtd,
41 int cmd, unsigned int ctrl)
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42{
43 struct nand_chip *this = mtd->priv;
0176d43e 44
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45 if (ctrl & NAND_CTRL_CHANGE) {
46 ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
47 IO_ADDR_W &= ~(MASK_ALE | MASK_CLE);
48
49 if (ctrl & NAND_CLE)
50 IO_ADDR_W |= MASK_CLE;
51 if (ctrl & NAND_ALE)
52 IO_ADDR_W |= MASK_ALE;
53
54 at91_set_gpio_value(AT91_PIN_PC14, !(ctrl & NAND_NCE));
55 this->IO_ADDR_W = (void *) IO_ADDR_W;
0176d43e 56 }
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57
58 if (cmd != NAND_CMD_NONE)
59 writeb(cmd, this->IO_ADDR_W);
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60}
61
62static int at91sam9260ek_nand_ready(struct mtd_info *mtd)
63{
64 return at91_get_gpio_value(AT91_PIN_PC13);
65}
66
67int board_nand_init(struct nand_chip *nand)
68{
aa5f75f2 69 nand->ecc.mode = NAND_ECC_SOFT;
6d0f6bcf 70#ifdef CONFIG_SYS_NAND_DBW_16
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71 nand->options = NAND_BUSWIDTH_16;
72#endif
aa5f75f2 73 nand->cmd_ctrl = at91sam9260ek_nand_hwcontrol;
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74 nand->dev_ready = at91sam9260ek_nand_ready;
75 nand->chip_delay = 20;
76
77 return 0;
78}