1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
|
/* $Id: mtd.h,v 1.35 2002/08/29 21:41:42 gleixner Exp $ */
/*
* ChangeLog:
* 19-Sep-2002 Lineo Japan, Inc. add erase-by-force mode
*
*/
/*
* ChangeLog:
* 19-Sep-2002 Lineo Japan, Inc. add erase-by-force mode
* 23-Oct-2002 SHARP add definitions for CONFIG_MTD_NAND_LOGICAL_ADDRESS_ACCESS
*
*/
#ifndef __MTD_MTD_H__
#define __MTD_MTD_H__
#ifdef __KERNEL__
#include <linux/config.h>
#include <linux/version.h>
#include <linux/types.h>
#include <linux/mtd/compatmac.h>
#include <linux/module.h>
#include <linux/uio.h>
#endif /* __KERNEL__ */
struct erase_info_user {
u_int32_t start;
u_int32_t length;
};
struct mtd_oob_buf {
u_int32_t start;
u_int32_t length;
unsigned char *ptr;
};
#define MTD_CHAR_MAJOR 90
#define MTD_BLOCK_MAJOR 31
#define MAX_MTD_DEVICES 16
#define MTD_ABSENT 0
#define MTD_RAM 1
#define MTD_ROM 2
#define MTD_NORFLASH 3
#define MTD_NANDFLASH 4
#define MTD_PEROM 5
#define MTD_OTHER 14
#define MTD_UNKNOWN 15
#define MTD_CLEAR_BITS 1 // Bits can be cleared (flash)
#define MTD_SET_BITS 2 // Bits can be set
#define MTD_ERASEABLE 4 // Has an erase function
#define MTD_WRITEB_WRITEABLE 8 // Direct IO is possible
#define MTD_VOLATILE 16 // Set for RAMs
#define MTD_XIP 32 // eXecute-In-Place possible
#define MTD_OOB 64 // Out-of-band data (NAND flash)
#define MTD_ECC 128 // Device capable of automatic ECC
// Some common devices / combinations of capabilities
#define MTD_CAP_ROM 0
#define MTD_CAP_RAM (MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
#define MTD_CAP_NORFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE)
#define MTD_CAP_NANDFLASH (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
#define MTD_WRITEABLE (MTD_CLEAR_BITS|MTD_SET_BITS)
// Types of automatic ECC/Checksum available
#define MTD_ECC_NONE 0 // No automatic ECC available
#define MTD_ECC_RS_DiskOnChip 1 // Automatic ECC on DiskOnChip
#define MTD_ECC_SW 2 // SW ECC for Toshiba & Samsung devices
struct mtd_info_user {
u_char type;
u_int32_t flags;
u_int32_t size; // Total size of the MTD
u_int32_t erasesize;
u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
u_int32_t ecctype;
u_int32_t eccsize;
};
struct region_info_user {
u_int32_t offset; /* At which this region starts,
* from the beginning of the MTD */
u_int32_t erasesize; /* For this region */
u_int32_t numblocks; /* Number of blocks in this region */
u_int32_t regionindex;
};
#ifdef CONFIG_MTD_NAND_LOGICAL_ADDRESS_ACCESS
struct read_laddr_info_user {
loff_t from;
size_t len;
u_char* buf;
};
struct write_laddr_info_user {
loff_t to;
size_t len;
u_char* buf;
};
#endif
#define MEMGETINFO _IOR('M', 1, struct mtd_info_user)
#define MEMERASE _IOW('M', 2, struct erase_info_user)
#define MEMWRITEOOB _IOWR('M', 3, struct mtd_oob_buf)
#define MEMREADOOB _IOWR('M', 4, struct mtd_oob_buf)
#define MEMLOCK _IOW('M', 5, struct erase_info_user)
#define MEMUNLOCK _IOW('M', 6, struct erase_info_user)
#define MEMGETREGIONCOUNT _IOR('M', 7, int)
#define MEMGETREGIONINFO _IOWR('M', 8, struct region_info_user)
#ifdef CONFIG_MTD_NAND_ERASE_BY_FORCE
#define MEMERASEBYFORCE _IOW('M', 9, struct erase_info_user)
#else
#define MEMIOCTLRSV9 _IO('M', 9)
#endif
#ifdef CONFIG_MTD_NAND_LOGICAL_ADDRESS_ACCESS
#define MEMCLEANUPLADDR _IO('M', 10)
#define MEMREADLADDR _IOR('M', 11, struct read_laddr_info_user)
#define MEMWRITELADDR _IOW('M', 12, struct write_laddr_info_user)
#else
#define MEMIOCTLRSV10 _IO('M', 10)
#define MEMIOCTLRSV11 _IO('M', 11)
#define MEMIOCTLRSV12 _IO('M', 12)
#endif
#ifndef __KERNEL__
typedef struct mtd_info_user mtd_info_t;
typedef struct erase_info_user erase_info_t;
typedef struct region_info_user region_info_t;
/* User-space ioctl definitions */
#else /* __KERNEL__ */
#define MTD_ERASE_PENDING 0x01
#define MTD_ERASING 0x02
#define MTD_ERASE_SUSPEND 0x04
#define MTD_ERASE_DONE 0x08
#define MTD_ERASE_FAILED 0x10
struct erase_info {
struct mtd_info *mtd;
u_int32_t addr;
u_int32_t len;
u_long time;
u_long retries;
u_int dev;
u_int cell;
void (*callback) (struct erase_info *self);
u_long priv;
u_char state;
struct erase_info *next;
#ifdef CONFIG_MTD_NAND_ERASE_BY_FORCE
int by_force;
#endif
};
struct mtd_erase_region_info {
u_int32_t offset; /* At which this region starts, from the beginning of the MTD */
u_int32_t erasesize; /* For this region */
u_int32_t numblocks; /* Number of blocks of erasesize in this region */
};
struct mtd_info {
u_char type;
u_int32_t flags;
u_int32_t size; // Total size of the MTD
/* "Major" erase size for the device. Na�ve users may take this
* to be the only erase size available, or may use the more detailed
* information below if they desire
*/
u_int32_t erasesize;
u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
u_int32_t ecctype;
u_int32_t eccsize;
// Kernel-only stuff starts here.
char *name;
int index;
/* Data for variable erase regions. If numeraseregions is zero,
* it means that the whole device has erasesize as given above.
*/
int numeraseregions;
struct mtd_erase_region_info *eraseregions;
/* This really shouldn't be here. It can go away in 2.5 */
u_int32_t bank_size;
struct module *module;
int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
/* This stuff for eXecute-In-Place */
int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
/* We probably shouldn't allow XIP if the unpoint isn't a NULL */
void (*unpoint) (struct mtd_info *mtd, u_char * addr);
int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
int (*read_ecc) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, int oobsel);
int (*write_ecc) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, int oobsel);
int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
/*
* Methods to access the protection register area, present in some
* flash devices. The user data is one time programmable but the
* factory data is read only.
*/
int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
int (*read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
/* This function is not yet implemented */
int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
/* iovec-based read/write methods. We need these especially for NAND flash,
with its limited number of write cycles per erase.
NB: The 'count' parameter is the number of _vectors_, each of
which contains an (ofs, len) tuple.
*/
int (*readv) (struct mtd_info *mtd, struct iovec *vecs, unsigned long count, loff_t from, size_t *retlen);
int (*readv_ecc) (struct mtd_info *mtd, struct iovec *vecs, unsigned long count, loff_t from,
size_t *retlen, u_char *eccbuf, int oobsel);
int (*writev) (struct mtd_info *mtd, const struct iovec *vecs, unsigned long count, loff_t to, size_t *retlen);
int (*writev_ecc) (struct mtd_info *mtd, const struct iovec *vecs, unsigned long count, loff_t to,
size_t *retlen, u_char *eccbuf, int oobsel);
/* Sync */
void (*sync) (struct mtd_info *mtd);
/* Chip-supported device locking */
int (*lock) (struct mtd_info *mtd, loff_t ofs, size_t len);
int (*unlock) (struct mtd_info *mtd, loff_t ofs, size_t len);
/* Power Management functions */
int (*suspend) (struct mtd_info *mtd);
void (*resume) (struct mtd_info *mtd);
#ifdef CONFIG_MTD_NAND_LOGICAL_ADDRESS_ACCESS
/* Logical Address Access functions */
int (*cleanup_laddr)(struct mtd_info *mtd);
int (*read_laddr)(struct mtd_info *mtd, loff_t from, size_t len, u_char *buf);
int (*write_laddr)(struct mtd_info *mtd, loff_t to, size_t len, u_char *buf, int (*eraseproc)(struct mtd_info *mtd, u_int32_t addr));
#endif
void *priv;
};
/* Kernel-side ioctl definitions */
extern int add_mtd_device(struct mtd_info *mtd);
extern int del_mtd_device (struct mtd_info *mtd);
extern struct mtd_info *__get_mtd_device(struct mtd_info *mtd, int num);
static inline struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num)
{
struct mtd_info *ret;
ret = __get_mtd_device(mtd, num);
if (ret && ret->module && !try_inc_mod_count(ret->module))
return NULL;
return ret;
}
static inline void put_mtd_device(struct mtd_info *mtd)
{
if (mtd->module)
__MOD_DEC_USE_COUNT(mtd->module);
}
struct mtd_notifier {
void (*add)(struct mtd_info *mtd);
void (*remove)(struct mtd_info *mtd);
struct mtd_notifier *next;
};
extern void register_mtd_user (struct mtd_notifier *new);
extern int unregister_mtd_user (struct mtd_notifier *old);
#ifndef MTDC
#define MTD_ERASE(mtd, args...) (*(mtd->erase))(mtd, args)
#define MTD_POINT(mtd, a,b,c,d) (*(mtd->point))(mtd, a,b,c, (u_char **)(d))
#define MTD_UNPOINT(mtd, arg) (*(mtd->unpoint))(mtd, (u_char *)arg)
#define MTD_READ(mtd, args...) (*(mtd->read))(mtd, args)
#define MTD_WRITE(mtd, args...) (*(mtd->write))(mtd, args)
#define MTD_READV(mtd, args...) (*(mtd->readv))(mtd, args)
#define MTD_WRITEV(mtd, args...) (*(mtd->writev))(mtd, args)
#define MTD_READECC(mtd, args...) (*(mtd->read_ecc))(mtd, args)
#define MTD_WRITEECC(mtd, args...) (*(mtd->write_ecc))(mtd, args)
#define MTD_READOOB(mtd, args...) (*(mtd->read_oob))(mtd, args)
#define MTD_WRITEOOB(mtd, args...) (*(mtd->write_oob))(mtd, args)
#define MTD_SYNC(mtd) do { if (mtd->sync) (*(mtd->sync))(mtd); } while (0)
#endif /* MTDC */
/*
* Debugging macro and defines
*/
#define MTD_DEBUG_LEVEL0 (0) /* Quiet */
#define MTD_DEBUG_LEVEL1 (1) /* Audible */
#define MTD_DEBUG_LEVEL2 (2) /* Loud */
#define MTD_DEBUG_LEVEL3 (3) /* Noisy */
#ifdef CONFIG_MTD_DEBUG
#define DEBUG(n, args...) \
if (n <= CONFIG_MTD_DEBUG_VERBOSE) { \
printk(KERN_INFO args); \
}
#else /* CONFIG_MTD_DEBUG */
#define DEBUG(n, args...)
#endif /* CONFIG_MTD_DEBUG */
#endif /* __KERNEL__ */
#endif /* __MTD_MTD_H__ */
|
