3 * 2N Telekomunikace, a.s. <www.2n.cz>
4 * Ladislav Michl <michl@2n.cz>
6 * See file CREDITS for list of people who contributed to this
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
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 extern void nand_init(void);
29 #include <linux/mtd/compat.h>
30 #include <linux/mtd/mtd.h>
31 #include <linux/mtd/nand.h>
33 extern int board_nand_init(struct nand_chip
*nand
);
35 typedef struct mtd_info nand_info_t
;
37 extern int nand_curr_device
;
38 extern nand_info_t nand_info
[];
40 static inline int nand_read(nand_info_t
*info
, loff_t ofs
, size_t *len
, u_char
*buf
)
42 return info
->read(info
, ofs
, *len
, (size_t *)len
, buf
);
45 static inline int nand_write(nand_info_t
*info
, loff_t ofs
, size_t *len
, u_char
*buf
)
47 return info
->write(info
, ofs
, *len
, (size_t *)len
, buf
);
50 static inline int nand_block_isbad(nand_info_t
*info
, loff_t ofs
)
52 return info
->block_isbad(info
, ofs
);
55 static inline int nand_erase(nand_info_t
*info
, loff_t off
, size_t size
)
57 struct erase_info instr
;
64 return info
->erase(info
, &instr
);
68 /*****************************************************************************
69 * declarations from nand_util.c
70 ****************************************************************************/
72 struct nand_write_options
{
73 u_char
*buffer
; /* memory block containing image to write */
74 ulong length
; /* number of bytes to write */
75 ulong offset
; /* start address in NAND */
76 int quiet
; /* don't display progress messages */
77 int autoplace
; /* if true use auto oob layout */
78 int forcejffs2
; /* force jffs2 oob layout */
79 int forceyaffs
; /* force yaffs oob layout */
80 int noecc
; /* write without ecc */
81 int writeoob
; /* image contains oob data */
82 int pad
; /* pad to page size */
83 int blockalign
; /* 1|2|4 set multiple of eraseblocks
87 typedef struct nand_write_options nand_write_options_t
;
88 typedef struct mtd_oob_ops mtd_oob_ops_t
;
90 struct nand_read_options
{
91 u_char
*buffer
; /* memory block in which read image is written*/
92 ulong length
; /* number of bytes to read */
93 ulong offset
; /* start address in NAND */
94 int quiet
; /* don't display progress messages */
95 int readoob
; /* put oob data in image */
98 typedef struct nand_read_options nand_read_options_t
;
100 struct nand_erase_options
{
101 ulong length
; /* number of bytes to erase */
102 ulong offset
; /* first address in NAND to erase */
103 int quiet
; /* don't display progress messages */
104 int jffs2
; /* if true: format for jffs2 usage
105 * (write appropriate cleanmarker blocks) */
106 int scrub
; /* if true, really clean NAND by erasing
107 * bad blocks (UNSAFE) */
110 typedef struct nand_erase_options nand_erase_options_t
;
112 int nand_read_skip_bad(nand_info_t
*nand
, loff_t offset
, size_t *length
,
114 int nand_write_skip_bad(nand_info_t
*nand
, loff_t offset
, size_t *length
,
116 int nand_erase_opts(nand_info_t
*meminfo
, const nand_erase_options_t
*opts
);
118 #define NAND_LOCK_STATUS_TIGHT 0x01
119 #define NAND_LOCK_STATUS_LOCK 0x02
120 #define NAND_LOCK_STATUS_UNLOCK 0x04
122 int nand_lock( nand_info_t
*meminfo
, int tight
);
123 int nand_unlock( nand_info_t
*meminfo
, ulong start
, ulong length
);
124 int nand_get_lock_status(nand_info_t
*meminfo
, loff_t offset
);
126 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
127 void board_nand_select_device(struct nand_chip
*nand
, int chip
);
130 __attribute__((noreturn
)) void nand_boot(void);
134 #ifdef CONFIG_ENV_OFFSET_OOB
135 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
137 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
138 stored as byte number */
139 #define ENV_OFFSET_SIZE 8
140 int get_nand_env_oob(nand_info_t
*nand
, unsigned long *result
);