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56a4a63c | 1 | /* |
2 | * (C) Copyright 2006 Detlev Zundel, dzu@denx.de | |
3 | * (C) Copyright 2006 DENX Software Engineering | |
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> | |
cfa460ad | 25 | #include <asm/io.h> |
56a4a63c | 26 | |
3fe00109 | 27 | #if defined(CONFIG_CMD_NAND) |
56a4a63c | 28 | |
29 | #include <nand.h> | |
30 | ||
31 | #if defined(CONFIG_IDS852_REV1) | |
32 | /* | |
33 | * hardware specific access to control-lines | |
34 | */ | |
cfa460ad | 35 | static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) |
56a4a63c | 36 | { |
37 | struct nand_chip *this = mtd->priv; | |
38 | ||
5e1dae5c | 39 | if (ctrl & NAND_CTRL_CHANGE) { |
cfa460ad WJ |
40 | if ( ctrl & NAND_CLE ) |
41 | this->IO_ADDR_W += 2; | |
42 | else | |
43 | this->IO_ADDR_W -= 2; | |
44 | if ( ctrl & NAND_ALE ) | |
45 | this->IO_ADDR_W += 1; | |
46 | else | |
47 | this->IO_ADDR_W -= 1; | |
56a4a63c | 48 | } |
cfa460ad | 49 | |
5e1dae5c | 50 | if (cmd != NAND_CMD_NONE) |
4cbb651b | 51 | writeb(cmd, this->IO_ADDR_W); |
56a4a63c | 52 | } |
53 | #elif defined(CONFIG_IDS852_REV2) | |
54 | /* | |
55 | * hardware specific access to control-lines | |
56 | */ | |
cfa460ad | 57 | static void nc650_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) |
56a4a63c | 58 | { |
59 | struct nand_chip *this = mtd->priv; | |
60 | ||
5e1dae5c | 61 | if (ctrl & NAND_CTRL_CHANGE) { |
cfa460ad WJ |
62 | if ( ctrl & NAND_CLE ) |
63 | writeb(0, (volatile __u8 *) this->IO_ADDR_W + 0xa); | |
64 | else | |
65 | writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); | |
66 | if ( ctrl & NAND_ALE ) | |
67 | writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x9); | |
68 | else | |
69 | writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); | |
70 | if ( ctrl & NAND_NCE ) | |
71 | writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0x8); | |
72 | else | |
73 | writeb(0, (volatile __u8 *) this->IO_ADDR_W) + 0xc); | |
56a4a63c | 74 | } |
cfa460ad | 75 | |
5e1dae5c | 76 | if (cmd != NAND_CMD_NONE) |
cfa460ad | 77 | writeb(cmd, this->IO_ADDR_W); |
56a4a63c | 78 | } |
79 | #else | |
80 | #error Unknown IDS852 module revision | |
81 | #endif | |
82 | ||
83 | /* | |
84 | * Board-specific NAND initialization. The following members of the | |
85 | * argument are board-specific (per include/linux/mtd/nand.h): | |
86 | * - IO_ADDR_R?: address to read the 8 I/O lines of the flash device | |
87 | * - IO_ADDR_W?: address to write the 8 I/O lines of the flash device | |
cfa460ad | 88 | * - cmd_ctrl: hardwarespecific function for accesing control-lines |
56a4a63c | 89 | * - dev_ready: hardwarespecific function for accesing device ready/busy line |
90 | * - enable_hwecc?: function to enable (reset) hardware ecc generator. Must | |
91 | * only be provided if a hardware ECC is available | |
cfa460ad | 92 | * - eccm.ode: mode of ecc, see defines |
56a4a63c | 93 | * - chip_delay: chip dependent delay for transfering data from array to |
94 | * read regs (tR) | |
95 | * - options: various chip options. They can partly be set to inform | |
96 | * nand_scan about special functionality. See the defines for further | |
97 | * explanation | |
98 | * Members with a "?" were not set in the merged testing-NAND branch, | |
99 | * so they are not set here either. | |
100 | */ | |
fa230445 | 101 | int board_nand_init(struct nand_chip *nand) |
56a4a63c | 102 | { |
103 | ||
cfa460ad WJ |
104 | nand->cmd_ctrl = nc650_hwcontrol; |
105 | nand->ecc.mode = NAND_ECC_SOFT; | |
56a4a63c | 106 | nand->chip_delay = 12; |
107 | /* nand->options = NAND_SAMSUNG_LP_OPTIONS;*/ | |
fa230445 | 108 | return 0; |
56a4a63c | 109 | } |
3fe00109 | 110 | #endif |