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1 /*
2  * (C) Copyright 2005
3  * 2N Telekomunikace, a.s. <www.2n.cz>
4  * Ladislav Michl <michl@2n.cz>
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
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.
12  */
13
14 #ifndef _NAND_H_
15 #define _NAND_H_
16
17 #include <config.h>
18
19 extern void nand_init(void);
20
21 #include <linux/compat.h>
22 #include <linux/mtd/mtd.h>
23 #include <linux/mtd/nand.h>
24
25 #ifdef CONFIG_SYS_NAND_SELF_INIT
26 void board_nand_init(void);
27 int nand_register(int devnum);
28 #else
29 extern int board_nand_init(struct nand_chip *nand);
30 #endif
31
32 typedef struct mtd_info nand_info_t;
33
34 extern int nand_curr_device;
35 extern nand_info_t nand_info[];
36
37 static inline int nand_read(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
38 {
39         return mtd_read(info, ofs, *len, (size_t *)len, buf);
40 }
41
42 static inline int nand_write(nand_info_t *info, loff_t ofs, size_t *len, u_char *buf)
43 {
44         return mtd_write(info, ofs, *len, (size_t *)len, buf);
45 }
46
47 static inline int nand_block_isbad(nand_info_t *info, loff_t ofs)
48 {
49         return mtd_block_isbad(info, ofs);
50 }
51
52 static inline int nand_erase(nand_info_t *info, loff_t off, size_t size)
53 {
54         struct erase_info instr;
55
56         instr.mtd = info;
57         instr.addr = off;
58         instr.len = size;
59         instr.callback = 0;
60
61         return mtd_erase(info, &instr);
62 }
63
64
65 /*****************************************************************************
66  * declarations from nand_util.c
67  ****************************************************************************/
68
69 struct nand_write_options {
70         u_char *buffer;         /* memory block containing image to write */
71         ulong length;           /* number of bytes to write */
72         ulong offset;           /* start address in NAND */
73         int quiet;              /* don't display progress messages */
74         int autoplace;          /* if true use auto oob layout */
75         int forcejffs2;         /* force jffs2 oob layout */
76         int forceyaffs;         /* force yaffs oob layout */
77         int noecc;              /* write without ecc */
78         int writeoob;           /* image contains oob data */
79         int pad;                /* pad to page size */
80         int blockalign;         /* 1|2|4 set multiple of eraseblocks
81                                  * to align to */
82 };
83
84 typedef struct nand_write_options nand_write_options_t;
85 typedef struct mtd_oob_ops mtd_oob_ops_t;
86
87 struct nand_read_options {
88         u_char *buffer;         /* memory block in which read image is written*/
89         ulong length;           /* number of bytes to read */
90         ulong offset;           /* start address in NAND */
91         int quiet;              /* don't display progress messages */
92         int readoob;            /* put oob data in image */
93 };
94
95 typedef struct nand_read_options nand_read_options_t;
96
97 struct nand_erase_options {
98         loff_t length;          /* number of bytes to erase */
99         loff_t offset;          /* first address in NAND to erase */
100         int quiet;              /* don't display progress messages */
101         int jffs2;              /* if true: format for jffs2 usage
102                                  * (write appropriate cleanmarker blocks) */
103         int scrub;              /* if true, really clean NAND by erasing
104                                  * bad blocks (UNSAFE) */
105
106         /* Don't include skipped bad blocks in size to be erased */
107         int spread;
108         /* maximum size that actual may be in order to not exceed the buf */
109         loff_t lim;
110 };
111
112 typedef struct nand_erase_options nand_erase_options_t;
113
114 int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
115                        size_t *actual, loff_t lim, u_char *buffer);
116
117 #define WITH_YAFFS_OOB  (1 << 0) /* whether write with yaffs format. This flag
118                                   * is a 'mode' meaning it cannot be mixed with
119                                   * other flags */
120 #define WITH_DROP_FFS   (1 << 1) /* drop trailing all-0xff pages */
121
122 int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length,
123                         size_t *actual, loff_t lim, u_char *buffer, int flags);
124 int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts);
125 int nand_torture(nand_info_t *nand, loff_t offset);
126
127 #define NAND_LOCK_STATUS_TIGHT  0x01
128 #define NAND_LOCK_STATUS_UNLOCK 0x04
129
130 int nand_lock(nand_info_t *meminfo, int tight);
131 int nand_unlock(nand_info_t *meminfo, loff_t start, size_t length,
132         int allexcept);
133 int nand_get_lock_status(nand_info_t *meminfo, loff_t offset);
134
135 int nand_spl_load_image(uint32_t offs, unsigned int size, void *dst);
136 void nand_deselect(void);
137
138 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
139 void board_nand_select_device(struct nand_chip *nand, int chip);
140 #endif
141
142 __attribute__((noreturn)) void nand_boot(void);
143
144 #endif
145
146 #ifdef CONFIG_ENV_OFFSET_OOB
147 #define ENV_OOB_MARKER 0x30425645 /*"EVB0" in little-endian -- offset is stored
148                                     as block number*/
149 #define ENV_OOB_MARKER_OLD 0x30564e45 /*"ENV0" in little-endian -- offset is
150                                         stored as byte number */
151 #define ENV_OFFSET_SIZE 8
152 int get_nand_env_oob(nand_info_t *nand, unsigned long *result);
153 #endif
154 int spl_nand_erase_one(int block, int page);