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205a0988 PW |
1 | /* |
2 | * (C) Copyright 2009 | |
3 | * Marvell Semiconductor <www.marvell.com> | |
4 | * Written-by: Prafulla Wadaskar <prafulla@marvell.com> | |
5 | * | |
6 | * See file CREDITS for list of people who contributed to this | |
7 | * project. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License as | |
11 | * published by the Free Software Foundation; either version 2 of | |
12 | * the License, or (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
22 | * MA 02111-1307 USA | |
23 | */ | |
24 | ||
25 | #include <common.h> | |
26 | #include <asm/io.h> | |
27 | #include <asm/arch/kirkwood.h> | |
28 | #include <nand.h> | |
29 | ||
30 | /* NAND Flash Soc registers */ | |
31 | struct kwnandf_registers { | |
32 | u32 rd_params; /* 0x10418 */ | |
33 | u32 wr_param; /* 0x1041c */ | |
34 | u8 pad[0x10470 - 0x1041c - 4]; | |
35 | u32 ctrl; /* 0x10470 */ | |
36 | }; | |
37 | ||
38 | static struct kwnandf_registers *nf_reg = | |
39 | (struct kwnandf_registers *)KW_NANDF_BASE; | |
40 | ||
41 | /* | |
42 | * hardware specific access to control-lines/bits | |
43 | */ | |
44 | #define NAND_ACTCEBOOT_BIT 0x02 | |
45 | ||
46 | static void kw_nand_hwcontrol(struct mtd_info *mtd, int cmd, | |
47 | unsigned int ctrl) | |
48 | { | |
49 | struct nand_chip *nc = mtd->priv; | |
50 | u32 offs; | |
51 | ||
52 | if (cmd == NAND_CMD_NONE) | |
53 | return; | |
54 | ||
55 | if (ctrl & NAND_CLE) | |
56 | offs = (1 << 0); /* Commands with A[1:0] == 01 */ | |
57 | else if (ctrl & NAND_ALE) | |
58 | offs = (1 << 1); /* Addresses with A[1:0] == 10 */ | |
59 | else | |
60 | return; | |
61 | ||
62 | writeb(cmd, nc->IO_ADDR_W + offs); | |
63 | } | |
64 | ||
65 | void kw_nand_select_chip(struct mtd_info *mtd, int chip) | |
66 | { | |
67 | u32 data; | |
68 | ||
69 | data = readl(&nf_reg->ctrl); | |
70 | data |= NAND_ACTCEBOOT_BIT; | |
71 | writel(data, &nf_reg->ctrl); | |
72 | } | |
73 | ||
74 | int board_nand_init(struct nand_chip *nand) | |
75 | { | |
76 | nand->options = NAND_COPYBACK | NAND_CACHEPRG | NAND_NO_PADDING; | |
77 | nand->ecc.mode = NAND_ECC_SOFT; | |
78 | nand->cmd_ctrl = kw_nand_hwcontrol; | |
79 | nand->chip_delay = 30; | |
80 | nand->select_chip = kw_nand_select_chip; | |
81 | return 0; | |
82 | } |