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73ccb341 GJ |
1 | /* |
2 | * (C) Copyright 2008 | |
3 | * Gary Jennejohn, DENX Software Engineering GmbH, garyj@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 | #include <config.h> | |
26 | #if defined(CONFIG_CMD_NAND) | |
27 | #include <asm/gpio.h> | |
ba22d10f | 28 | #include <asm/io.h> |
73ccb341 GJ |
29 | #include <nand.h> |
30 | ||
31 | /* | |
32 | * hardware specific access to control-lines | |
33 | */ | |
ba22d10f SW |
34 | static void quad100hd_hwcontrol(struct mtd_info *mtd, |
35 | int cmd, unsigned int ctrl) | |
73ccb341 | 36 | { |
ba22d10f | 37 | struct nand_chip *this = mtd->priv; |
73ccb341 | 38 | |
ba22d10f | 39 | if (ctrl & NAND_CTRL_CHANGE) { |
6d0f6bcf JCPV |
40 | gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE)); |
41 | gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE)); | |
42 | gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE)); | |
73ccb341 | 43 | } |
ba22d10f SW |
44 | |
45 | if (cmd != NAND_CMD_NONE) | |
46 | writeb(cmd, this->IO_ADDR_W); | |
73ccb341 GJ |
47 | } |
48 | ||
49 | static int quad100hd_nand_ready(struct mtd_info *mtd) | |
50 | { | |
6d0f6bcf | 51 | return gpio_read_in_bit(CONFIG_SYS_NAND_RDY); |
73ccb341 GJ |
52 | } |
53 | ||
54 | /* | |
55 | * Main initialization routine | |
56 | */ | |
57 | int board_nand_init(struct nand_chip *nand) | |
58 | { | |
59 | /* Set address of hardware control function */ | |
ba22d10f | 60 | nand->cmd_ctrl = quad100hd_hwcontrol; |
73ccb341 | 61 | nand->dev_ready = quad100hd_nand_ready; |
ba22d10f | 62 | nand->ecc.mode = NAND_ECC_SOFT; |
73ccb341 GJ |
63 | /* 15 us command delay time */ |
64 | nand->chip_delay = 20; | |
65 | ||
66 | /* Return happy */ | |
67 | return 0; | |
68 | } | |
69 | #endif /* CONFIG_CMD_NAND */ |