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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), | |
52 | THIS_ONENAND(ONENAND_REG_START_ADDRESS1)); | |
53 | ||
1bb707c3 KP |
54 | onenand_writew(onenand_bufferram_address(block), |
55 | THIS_ONENAND(ONENAND_REG_START_ADDRESS2)); | |
56 | ||
751b9b51 KP |
57 | onenand_writew(onenand_sector_address(page), |
58 | THIS_ONENAND(ONENAND_REG_START_ADDRESS8)); | |
59 | ||
60 | onenand_writew(onenand_buffer_address(), | |
61 | THIS_ONENAND(ONENAND_REG_START_BUFFER)); | |
62 | ||
751b9b51 KP |
63 | onenand_writew(ONENAND_INT_CLEAR, THIS_ONENAND(ONENAND_REG_INTERRUPT)); |
64 | ||
65 | onenand_writew(ONENAND_CMD_READ, THIS_ONENAND(ONENAND_REG_COMMAND)); | |
66 | ||
67 | #ifndef __HAVE_ARCH_MEMCPY32 | |
68 | p = (unsigned long *) buf; | |
69 | #endif | |
70 | base = (unsigned long *) (CFG_ONENAND_BASE + ONENAND_DATARAM); | |
71 | ||
72 | while (!(READ_INTERRUPT() & ONENAND_INT_READ)) | |
73 | continue; | |
74 | ||
75 | #ifdef __HAVE_ARCH_MEMCPY32 | |
76 | /* 32 bytes boundary memory copy */ | |
1bb707c3 | 77 | memcpy32(buf, base, pagesize); |
751b9b51 | 78 | #else |
1bb707c3 | 79 | for (offset = 0; offset < (pagesize >> 2); offset++) { |
751b9b51 KP |
80 | value = *(base + offset); |
81 | *p++ = value; | |
82 | } | |
83 | #endif | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | #define ONENAND_START_PAGE 1 | |
89 | #define ONENAND_PAGES_PER_BLOCK 64 | |
90 | ||
91 | /** | |
92 | * onenand_read_block - Read a block data to buf | |
93 | * @return 0 on success | |
94 | */ | |
1bb707c3 | 95 | int onenand_read_block0(unsigned char *buf) |
751b9b51 KP |
96 | { |
97 | int page, offset = 0; | |
1bb707c3 KP |
98 | int pagesize = ONENAND_PAGE_SIZE; |
99 | ||
100 | /* MLC OneNAND has 4KiB page size */ | |
101 | if (onenand_readw(THIS_ONENAND(ONENAND_REG_TECHNOLOGY))) | |
102 | pagesize <<= 1; | |
751b9b51 KP |
103 | |
104 | /* NOTE: you must read page from page 1 of block 0 */ | |
105 | /* read the block page by page*/ | |
106 | for (page = ONENAND_START_PAGE; | |
107 | page < ONENAND_PAGES_PER_BLOCK; page++) { | |
108 | ||
1bb707c3 KP |
109 | onenand_read_page(0, page, buf + offset, pagesize); |
110 | offset += pagesize; | |
751b9b51 KP |
111 | } |
112 | ||
113 | return 0; | |
114 | } |