]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - board/esd/common/esd405ep_nand.c
rename CFG_ macros to CONFIG_SYS
[karo-tx-uboot.git] / board / esd / common / esd405ep_nand.c
1 /*
2  * (C) Copyright 2007
3  * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
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 defined(CONFIG_CMD_NAND)
27 #include <asm/io.h>
28 #include <nand.h>
29
30 /*
31  * hardware specific access to control-lines
32  */
33 static void esd405ep_nand_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl)
34 {
35         struct nand_chip *this = mtd->priv;
36         if (ctrl & NAND_CTRL_CHANGE) {
37                 if ( ctrl & NAND_CLE )
38                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CLE);
39                 else
40                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CLE);
41                 if ( ctrl & NAND_ALE )
42                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_ALE);
43                 else
44                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_ALE);
45                 if ( ctrl & NAND_NCE )
46                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~CONFIG_SYS_NAND_CE);
47                 else
48                         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
49         }
50
51         if (cmd != NAND_CMD_NONE)
52                 writeb(cmd, this->IO_ADDR_W);
53 }
54
55
56 /*
57  * read device ready pin
58  */
59 static int esd405ep_nand_device_ready(struct mtd_info *mtdinfo)
60 {
61         if (in_be32((void *)GPIO0_IR) & CONFIG_SYS_NAND_RDY)
62                 return 1;
63         return 0;
64 }
65
66
67 int board_nand_init(struct nand_chip *nand)
68 {
69         /*
70          * Set NAND-FLASH GPIO signals to defaults
71          */
72         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) & ~(CONFIG_SYS_NAND_CLE | CONFIG_SYS_NAND_ALE));
73         out_be32((void *)GPIO0_OR, in_be32((void *)GPIO0_OR) | CONFIG_SYS_NAND_CE);
74
75         /*
76          * Initialize nand_chip structure
77          */
78         nand->cmd_ctrl = esd405ep_nand_hwcontrol;
79         nand->dev_ready = esd405ep_nand_device_ready;
80         nand->ecc.mode = NAND_ECC_SOFT;
81         nand->chip_delay = NAND_BIG_DELAY_US;
82         nand->options = NAND_SAMSUNG_LP_OPTIONS;
83         return 0;
84 }
85 #endif