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 #ifdef CONFIG_SYS_NAND_SELF_INIT
34 void board_nand_init(void);
35 int nand_register(int devnum);
37 extern int board_nand_init(struct nand_chip *nand);
40 typedef struct mtd_info nand_info_t;
42 extern int nand_curr_device;
43 extern nand_info_t nand_info[];
45 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
47 return info->read(info, ofs, *len, (size_t *)len, buf);
50 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
52 return info->write(info, ofs, *len, (size_t *)len, buf);
55 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs)
57 return info->block_isbad(info, ofs);
60 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size)
62 struct erase_info instr;
69 return info->erase(info, &instr);
73 /*****************************************************************************
74 * declarations from nand_util.c
75 ****************************************************************************/
77 struct nand_write_options {
78 u_char *buffer; /* memory block containing image to write */
79 ulong length; /* number of bytes to write */
80 ulong offset; /* start address in NAND */
81 int quiet; /* don't display progress messages */
82 int autoplace; /* if true use auto oob layout */
83 int forcejffs2; /* force jffs2 oob layout */
84 int forceyaffs; /* force yaffs oob layout */
85 int noecc; /* write without ecc */
86 int writeoob; /* image contains oob data */
87 int pad; /* pad to page size */
88 int blockalign; /* 1|2|4 set multiple of eraseblocks
92 typedef struct nand_write_options nand_write_options_t;
93 typedef struct mtd_oob_ops mtd_oob_ops_t;
95 struct nand_read_options {
96 u_char *buffer; /* memory block in which read image is written*/
97 ulong length; /* number of bytes to read */
98 ulong offset; /* start address in NAND */
99 int quiet; /* don't display progress messages */
100 int readoob; /* put oob data in image */
103 typedef struct nand_read_options nand_read_options_t;
105 struct nand_erase_options {
106 loff_t length; /* number of bytes to erase */
107 loff_t offset; /* first address in NAND to erase */
108 int quiet; /* don't display progress messages */
109 int jffs2; /* if true: format for jffs2 usage
110 * (write appropriate cleanmarker blocks) */
111 int scrub; /* if true, really clean NAND by erasing
112 * bad blocks (UNSAFE) */
114 /* Don't include skipped bad blocks in size to be erased */
118 typedef struct nand_erase_options nand_erase_options_t;
120 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
123 #define WITH_YAFFS_OOB (1 << 0) /* whether write with yaffs format. This flag
124 * is a 'mode' meaning it cannot be mixed with
126 #define WITH_DROP_FFS (1 << 1) /* drop trailing all-0xff pages */
128 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
129 u_char *buffer, int flags);
130 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
132 #define NAND_LOCK_STATUS_TIGHT 0x01
133 #define NAND_LOCK_STATUS_LOCK 0x02
134 #define NAND_LOCK_STATUS_UNLOCK 0x04
136 int nand_lock( nand_info_t *meminfo, int tight );
137 int nand_unlock( nand_info_t *meminfo, ulong start, ulong length );
138 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
140 int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst);
141 void nand_deselect(void);
143 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
144 void board_nand_select_device(struct nand_chip *nand, int chip);
147 __attribute__((noreturn)) void nand_boot(void);
151 #ifdef CONFIG_ENV_OFFSET_OOB
152 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
154 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
155 stored as byte number */
156 #define ENV_OFFSET_SIZE 8
157 int get_nand_env_oob(nand_info_t *nand, unsigned long *result);