blob: 5af1a311750b56c64a3d4e9f31e04d7bd0527994 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* (C) Copyright 2007-2008
* Stelian Pop <stelian.pop@leadtechdesign.com>
* Lead Tech Design <www.leadtechdesign.com>
*
* (C) Copyright 2006 ATMEL Rousset, Lacressonniere Nicolas
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/arch/at91sam9rl.h>
#include <asm/arch/gpio.h>
#include <asm/arch/at91_pio.h>
#include <nand.h>
/*
* hardware specific access to control-lines
*/
#define MASK_ALE (1 << 21) /* our ALE is AD21 */
#define MASK_CLE (1 << 22) /* our CLE is AD22 */
static void at91sam9rlek_nand_hwcontrol(struct mtd_info *mtd, int cmd)
{
struct nand_chip *this = mtd->priv;
ulong IO_ADDR_W = (ulong) this->IO_ADDR_W;
IO_ADDR_W &= ~(MASK_ALE|MASK_CLE);
switch (cmd) {
case NAND_CTL_SETCLE:
IO_ADDR_W |= MASK_CLE;
break;
case NAND_CTL_SETALE:
IO_ADDR_W |= MASK_ALE;
break;
case NAND_CTL_CLRNCE:
at91_set_gpio_value(AT91_PIN_PB6, 1);
break;
case NAND_CTL_SETNCE:
at91_set_gpio_value(AT91_PIN_PB6, 0);
break;
}
this->IO_ADDR_W = (void *) IO_ADDR_W;
}
static int at91sam9rlek_nand_ready(struct mtd_info *mtd)
{
return at91_get_gpio_value(AT91_PIN_PD17);
}
int board_nand_init(struct nand_chip *nand)
{
nand->eccmode = NAND_ECC_SOFT;
#ifdef CFG_NAND_DBW_16
nand->options = NAND_BUSWIDTH_16;
#endif
nand->hwcontrol = at91sam9rlek_nand_hwcontrol;
nand->dev_ready = at91sam9rlek_nand_ready;
nand->chip_delay = 20;
return 0;
}
|
