blob: 7daa877cddccdc1e0400db194fdf3a9b9db81678 [file] [log] [blame]
Wolfgang Denkf11033e2007-01-15 13:41:04 +01001/*
2 * (C) Copyright 2007
3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
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
26#if (CONFIG_COMMANDS & CFG_CMD_NAND)
27
28#include <nand.h>
29#include <asm/processor.h>
30
31#define readb(addr) *(volatile u_char *)(addr)
32#define readl(addr) *(volatile u_long *)(addr)
33#define writeb(d,addr) *(volatile u_char *)(addr) = (d)
34
35#define SC3_NAND_ALE 29 /* GPIO PIN 3 */
36#define SC3_NAND_CLE 30 /* GPIO PIN 2 */
37#define SC3_NAND_CE 27 /* GPIO PIN 5 */
38
39static void *sc3_io_base;
40static void *sc3_control_base = (void *)0xEF600700;
41
42static void sc3_nand_hwcontrol(struct mtd_info *mtd, int cmd)
43{
44 switch (cmd) {
45 case NAND_CTL_SETCLE:
46 set_bit (SC3_NAND_CLE, sc3_control_base);
47 break;
48 case NAND_CTL_CLRCLE:
49 clear_bit (SC3_NAND_CLE, sc3_control_base);
50 break;
51
52 case NAND_CTL_SETALE:
53 set_bit (SC3_NAND_ALE, sc3_control_base);
54 break;
55 case NAND_CTL_CLRALE:
56 clear_bit (SC3_NAND_ALE, sc3_control_base);
57 break;
58
59 case NAND_CTL_SETNCE:
60 set_bit (SC3_NAND_CE, sc3_control_base);
61 break;
62 case NAND_CTL_CLRNCE:
63 clear_bit (SC3_NAND_CE, sc3_control_base);
64 break;
65 }
66}
67
68static int sc3_nand_dev_ready(struct mtd_info *mtd)
69{
70 if (!(readl(sc3_control_base + 0x1C) & 0x4000))
71 return 0;
72 return 1;
73}
74
75static void sc3_select_chip(struct mtd_info *mtd, int chip)
76{
77 clear_bit (SC3_NAND_CE, sc3_control_base);
78}
79
80int board_nand_init(struct nand_chip *nand)
81{
82 nand->eccmode = NAND_ECC_SOFT;
83
84 sc3_io_base = (void *) CFG_NAND_BASE;
85 /* Set address of NAND IO lines (Using Linear Data Access Region) */
86 nand->IO_ADDR_R = (void __iomem *) sc3_io_base;
87 nand->IO_ADDR_W = (void __iomem *) sc3_io_base;
88 /* Reference hardware control function */
89 nand->hwcontrol = sc3_nand_hwcontrol;
90 nand->dev_ready = sc3_nand_dev_ready;
91 nand->select_chip = sc3_select_chip;
92 return 0;
93}
94#endif