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751b9b51 KP |
1 | /* |
2 | * (C) Copyright 2005-2008 Samsung Electronis | |
3 | * Kyungmin Park <kyungmin.park@samsung.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 | #include <asm/io.h> | |
27 | #include <asm/string.h> | |
28 | ||
29 | #include "onenand_ipl.h" | |
30 | ||
31 | #define onenand_block_address(block) (block) | |
32 | #define onenand_sector_address(page) (page << 2) | |
33 | #define onenand_buffer_address() ((1 << 3) << 8) | |
34 | #define onenand_bufferram_address(block) (0) | |
35 | ||
1bb707c3 KP |
36 | #ifdef __HAVE_ARCH_MEMCPY32 |
37 | extern void *memcpy32(void *dest, void *src, int size); | |
38 | #endif | |
39 | ||
751b9b51 | 40 | /* read a page with ECC */ |
1bb707c3 KP |
41 | static inline int onenand_read_page(ulong block, ulong page, |
42 | u_char * buf, int pagesize) | |
751b9b51 KP |
43 | { |
44 | unsigned long *base; | |
45 | ||
46 | #ifndef __HAVE_ARCH_MEMCPY32 | |
47 | unsigned int offset, value; | |
48 | unsigned long *p; | |
49 | #endif | |
50 | ||
51 | onenand_writew(onenand_block_address(block), | |
69bcabb5 | 52 | ONENAND_REG_START_ADDRESS1); |
751b9b51 | 53 | |
1bb707c3 | 54 | onenand_writew(onenand_bufferram_address(block), |
69bcabb5 | 55 | ONENAND_REG_START_ADDRESS2); |
1bb707c3 | 56 | |
751b9b51 | 57 | onenand_writew(onenand_sector_address(page), |
69bcabb5 | 58 | ONENAND_REG_START_ADDRESS8); |
751b9b51 KP |
59 | |
60 | onenand_writew(onenand_buffer_address(), | |
69bcabb5 | 61 | ONENAND_REG_START_BUFFER); |
751b9b51 | 62 | |
69bcabb5 | 63 | onenand_writew(ONENAND_INT_CLEAR, ONENAND_REG_INTERRUPT); |
751b9b51 | 64 | |
69bcabb5 | 65 | onenand_writew(ONENAND_CMD_READ, ONENAND_REG_COMMAND); |
751b9b51 KP |
66 | |
67 | #ifndef __HAVE_ARCH_MEMCPY32 | |
68 | p = (unsigned long *) buf; | |
69 | #endif | |
6d0f6bcf | 70 | base = (unsigned long *) (CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM); |
751b9b51 KP |
71 | |
72 | while (!(READ_INTERRUPT() & ONENAND_INT_READ)) | |
73 | continue; | |
74 | ||
69bcabb5 | 75 | /* Check for invalid block mark */ |
76 | if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff)) | |
77 | return 1; | |
78 | ||
751b9b51 KP |
79 | #ifdef __HAVE_ARCH_MEMCPY32 |
80 | /* 32 bytes boundary memory copy */ | |
1bb707c3 | 81 | memcpy32(buf, base, pagesize); |
751b9b51 | 82 | #else |
1bb707c3 | 83 | for (offset = 0; offset < (pagesize >> 2); offset++) { |
751b9b51 KP |
84 | value = *(base + offset); |
85 | *p++ = value; | |
86 | } | |
87 | #endif | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | #define ONENAND_START_PAGE 1 | |
93 | #define ONENAND_PAGES_PER_BLOCK 64 | |
94 | ||
95 | /** | |
69bcabb5 | 96 | * onenand_read_block - Read CONFIG_SYS_MONITOR_LEN from begining |
97 | * of OneNAND, skipping bad blocks | |
751b9b51 KP |
98 | * @return 0 on success |
99 | */ | |
69bcabb5 | 100 | int onenand_read_block(unsigned char *buf) |
751b9b51 | 101 | { |
69bcabb5 | 102 | int block; |
103 | int page = ONENAND_START_PAGE, offset = 0; | |
104 | int pagesize = 0, erase_shift = 0; | |
105 | int erasesize = 0, nblocks = 0; | |
106 | ||
107 | if (onenand_readw(ONENAND_REG_TECHNOLOGY)) { | |
108 | pagesize = 4096; /* MLC OneNAND has 4KiB pagesize */ | |
109 | erase_shift = 18; | |
110 | } else { | |
111 | pagesize = 2048; | |
112 | erase_shift = 17; | |
113 | } | |
1bb707c3 | 114 | |
69bcabb5 | 115 | erasesize = ONENAND_PAGES_PER_BLOCK * pagesize; |
116 | nblocks = (CONFIG_SYS_MONITOR_LEN + erasesize - 1) >> erase_shift; | |
751b9b51 KP |
117 | |
118 | /* NOTE: you must read page from page 1 of block 0 */ | |
119 | /* read the block page by page*/ | |
69bcabb5 | 120 | for (block = 0; block < nblocks; block++) { |
121 | for (; page < ONENAND_PAGES_PER_BLOCK; page++) { | |
122 | if (onenand_read_page(block, page, buf + offset, | |
123 | pagesize)) { | |
124 | /* This block is bad. Skip it | |
125 | * and read next block */ | |
126 | offset -= page * pagesize; | |
127 | nblocks++; | |
128 | break; | |
129 | } | |
130 | offset += pagesize; | |
131 | } | |
132 | page = 0; | |
751b9b51 KP |
133 | } |
134 | ||
135 | return 0; | |
136 | } |