2 * (C) Copyright 2005-2009 Samsung Electronics
3 * Kyungmin Park <kyungmin.park@samsung.com>
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 #include <asm/string.h>
29 #include "onenand_ipl.h"
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)
36 #ifdef __HAVE_ARCH_MEMCPY32
37 extern void *memcpy32(void *dest
, void *src
, int size
);
40 int (*onenand_read_page
)(ulong block
, ulong page
, u_char
*buf
, int pagesize
);
42 /* read a page with ECC */
43 static int generic_onenand_read_page(ulong block
, ulong page
,
44 u_char
* buf
, int pagesize
)
48 #ifndef __HAVE_ARCH_MEMCPY32
49 unsigned int offset
, value
;
53 onenand_writew(onenand_block_address(block
),
54 ONENAND_REG_START_ADDRESS1
);
56 onenand_writew(onenand_bufferram_address(block
),
57 ONENAND_REG_START_ADDRESS2
);
59 onenand_writew(onenand_sector_address(page
),
60 ONENAND_REG_START_ADDRESS8
);
62 onenand_writew(onenand_buffer_address(),
63 ONENAND_REG_START_BUFFER
);
65 onenand_writew(ONENAND_INT_CLEAR
, ONENAND_REG_INTERRUPT
);
67 onenand_writew(ONENAND_CMD_READ
, ONENAND_REG_COMMAND
);
69 #ifndef __HAVE_ARCH_MEMCPY32
70 p
= (unsigned long *) buf
;
72 base
= (unsigned long *) (CONFIG_SYS_ONENAND_BASE
+ ONENAND_DATARAM
);
74 while (!(READ_INTERRUPT() & ONENAND_INT_READ
))
77 /* Check for invalid block mark */
78 if (page
< 2 && (onenand_readw(ONENAND_SPARERAM
) != 0xffff))
81 #ifdef __HAVE_ARCH_MEMCPY32
82 /* 32 bytes boundary memory copy */
83 memcpy32(buf
, base
, pagesize
);
85 for (offset
= 0; offset
< (pagesize
>> 2); offset
++) {
86 value
= *(base
+ offset
);
94 #ifndef CONFIG_ONENAND_START_PAGE
95 #define CONFIG_ONENAND_START_PAGE 1
97 #define ONENAND_PAGES_PER_BLOCK 64
99 static void onenand_generic_init(int *page_is_4KiB
, int *page
)
103 if (onenand_readw(ONENAND_REG_TECHNOLOGY
))
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
))
114 * onenand_read_block - Read CONFIG_SYS_MONITOR_LEN from begining
115 * of OneNAND, skipping bad blocks
116 * @return 0 on success
118 int onenand_read_block(unsigned char *buf
)
121 int page
= CONFIG_ONENAND_START_PAGE
, offset
= 0;
122 int pagesize
, erasesize
, erase_shift
;
123 int page_is_4KiB
= 0;
125 onenand_read_page
= generic_onenand_read_page
;
127 onenand_generic_init(&page_is_4KiB
, &page
);
130 pagesize
= 4096; /* OneNAND has 4KiB pagesize */
133 pagesize
= 2048; /* OneNAND has 2KiB pagesize */
137 erasesize
= (1 << erase_shift
);
138 nblocks
= (CONFIG_SYS_MONITOR_LEN
+ erasesize
- 1) >> erase_shift
;
140 /* NOTE: you must read page from page 1 of block 0 */
141 /* read the block page by page */
142 for (block
= 0; block
< nblocks
; block
++) {
143 for (; page
< ONENAND_PAGES_PER_BLOCK
; page
++) {
144 if (onenand_read_page(block
, page
, buf
+ offset
,
146 /* This block is bad. Skip it
147 * and read next block */
148 offset
-= page
* pagesize
;