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751b9b51 | 1 | /* |
ca6189db | 2 | * (C) Copyright 2005-2009 Samsung Electronics |
751b9b51 KP |
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 | ||
ca6189db KP |
40 | int (*onenand_read_page)(ulong block, ulong page, u_char *buf, int pagesize); |
41 | ||
751b9b51 | 42 | /* read a page with ECC */ |
ca6189db | 43 | static int generic_onenand_read_page(ulong block, ulong page, |
1bb707c3 | 44 | u_char * buf, int pagesize) |
751b9b51 KP |
45 | { |
46 | unsigned long *base; | |
47 | ||
48 | #ifndef __HAVE_ARCH_MEMCPY32 | |
49 | unsigned int offset, value; | |
50 | unsigned long *p; | |
51 | #endif | |
52 | ||
53 | onenand_writew(onenand_block_address(block), | |
69bcabb5 | 54 | ONENAND_REG_START_ADDRESS1); |
751b9b51 | 55 | |
1bb707c3 | 56 | onenand_writew(onenand_bufferram_address(block), |
69bcabb5 | 57 | ONENAND_REG_START_ADDRESS2); |
1bb707c3 | 58 | |
751b9b51 | 59 | onenand_writew(onenand_sector_address(page), |
69bcabb5 | 60 | ONENAND_REG_START_ADDRESS8); |
751b9b51 KP |
61 | |
62 | onenand_writew(onenand_buffer_address(), | |
69bcabb5 | 63 | ONENAND_REG_START_BUFFER); |
751b9b51 | 64 | |
69bcabb5 | 65 | onenand_writew(ONENAND_INT_CLEAR, ONENAND_REG_INTERRUPT); |
751b9b51 | 66 | |
69bcabb5 | 67 | onenand_writew(ONENAND_CMD_READ, ONENAND_REG_COMMAND); |
751b9b51 KP |
68 | |
69 | #ifndef __HAVE_ARCH_MEMCPY32 | |
70 | p = (unsigned long *) buf; | |
71 | #endif | |
6d0f6bcf | 72 | base = (unsigned long *) (CONFIG_SYS_ONENAND_BASE + ONENAND_DATARAM); |
751b9b51 KP |
73 | |
74 | while (!(READ_INTERRUPT() & ONENAND_INT_READ)) | |
75 | continue; | |
76 | ||
69bcabb5 | 77 | /* Check for invalid block mark */ |
78 | if (page < 2 && (onenand_readw(ONENAND_SPARERAM) != 0xffff)) | |
79 | return 1; | |
80 | ||
751b9b51 KP |
81 | #ifdef __HAVE_ARCH_MEMCPY32 |
82 | /* 32 bytes boundary memory copy */ | |
1bb707c3 | 83 | memcpy32(buf, base, pagesize); |
751b9b51 | 84 | #else |
1bb707c3 | 85 | for (offset = 0; offset < (pagesize >> 2); offset++) { |
751b9b51 KP |
86 | value = *(base + offset); |
87 | *p++ = value; | |
88 | } | |
89 | #endif | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
ca6189db KP |
94 | #ifndef CONFIG_ONENAND_START_PAGE |
95 | #define CONFIG_ONENAND_START_PAGE 1 | |
96 | #endif | |
751b9b51 KP |
97 | #define ONENAND_PAGES_PER_BLOCK 64 |
98 | ||
ca6189db KP |
99 | static void onenand_generic_init(int *page_is_4KiB, int *page) |
100 | { | |
101 | int dev_id, density; | |
102 | ||
103 | if (onenand_readw(ONENAND_REG_TECHNOLOGY)) | |
104 | *page_is_4KiB = 1; | |
105 | dev_id = onenand_readw(ONENAND_REG_DEVICE_ID); | |
106 | density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT; | |
107 | density &= ONENAND_DEVICE_DENSITY_MASK; | |
108 | if (density >= ONENAND_DEVICE_DENSITY_4Gb && | |
109 | !(dev_id & ONENAND_DEVICE_IS_DDP)) | |
110 | *page_is_4KiB = 1; | |
111 | } | |
112 | ||
751b9b51 | 113 | /** |
69bcabb5 | 114 | * onenand_read_block - Read CONFIG_SYS_MONITOR_LEN from begining |
115 | * of OneNAND, skipping bad blocks | |
751b9b51 KP |
116 | * @return 0 on success |
117 | */ | |
69bcabb5 | 118 | int onenand_read_block(unsigned char *buf) |
751b9b51 | 119 | { |
ca6189db KP |
120 | int block, nblocks; |
121 | int page = CONFIG_ONENAND_START_PAGE, offset = 0; | |
122 | int pagesize, erasesize, erase_shift; | |
123 | int page_is_4KiB = 0; | |
124 | ||
125 | onenand_read_page = generic_onenand_read_page; | |
126 | ||
127 | onenand_generic_init(&page_is_4KiB, &page); | |
69bcabb5 | 128 | |
ca6189db KP |
129 | if (page_is_4KiB) { |
130 | pagesize = 4096; /* OneNAND has 4KiB pagesize */ | |
69bcabb5 | 131 | erase_shift = 18; |
132 | } else { | |
ca6189db | 133 | pagesize = 2048; /* OneNAND has 2KiB pagesize */ |
69bcabb5 | 134 | erase_shift = 17; |
135 | } | |
1bb707c3 | 136 | |
ca6189db | 137 | erasesize = (1 << erase_shift); |
69bcabb5 | 138 | nblocks = (CONFIG_SYS_MONITOR_LEN + erasesize - 1) >> erase_shift; |
751b9b51 KP |
139 | |
140 | /* NOTE: you must read page from page 1 of block 0 */ | |
ca6189db | 141 | /* read the block page by page */ |
69bcabb5 | 142 | for (block = 0; block < nblocks; block++) { |
143 | for (; page < ONENAND_PAGES_PER_BLOCK; page++) { | |
144 | if (onenand_read_page(block, page, buf + offset, | |
145 | pagesize)) { | |
146 | /* This block is bad. Skip it | |
147 | * and read next block */ | |
148 | offset -= page * pagesize; | |
149 | nblocks++; | |
150 | break; | |
151 | } | |
152 | offset += pagesize; | |
153 | } | |
154 | page = 0; | |
751b9b51 KP |
155 | } |
156 | ||
157 | return 0; | |
158 | } |