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 loff_t length; /* number of bytes to erase */
102 loff_t 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) */
109 /* Don't include skipped bad blocks in size to be erased */
113 typedef struct nand_erase_options nand_erase_options_t;
115 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
118 #define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag
119 * is a 'mode' meaning it cannot be mixed with
121 #define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */
123 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
124 u_char *buffer, int flags);
125 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
127 #define NAND_LOCK_STATUS_TIGHT 0x01
128 #define NAND_LOCK_STATUS_LOCK 0x02
129 #define NAND_LOCK_STATUS_UNLOCK 0x04
131 int nand_lock( nand_info_t *meminfo, int tight );
132 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
133 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
135 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
136 void board_nand_select_device(struct nand_chip *nand, int chip);
139 __attribute__((noreturn)) void nand_boot(void);
143 #ifdef CONFIG_ENV_OFFSET_OOB
144 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
146 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
147 stored as byte number */
148 #define ENV_OFFSET_SIZE 8
149 int get_nand_env_oob(nand_info_t *nand, unsigned long *result);