Commit | Line | Data |
---|---|---|
61ecfa87 | 1 | /* |
a1452a37 DW |
2 | * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org> et al. |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | * |
1da177e4 LT |
18 | */ |
19 | ||
20 | #ifndef __MTD_MTD_H__ | |
21 | #define __MTD_MTD_H__ | |
22 | ||
1da177e4 | 23 | #include <linux/types.h> |
1da177e4 | 24 | #include <linux/uio.h> |
963a6fb0 | 25 | #include <linux/notifier.h> |
1f24b5a8 | 26 | #include <linux/device.h> |
1da177e4 | 27 | |
1da177e4 LT |
28 | #include <mtd/mtd-abi.h> |
29 | ||
69423d99 AH |
30 | #include <asm/div64.h> |
31 | ||
e2e24e8e | 32 | #define MTD_ERASE_PENDING 0x01 |
1da177e4 LT |
33 | #define MTD_ERASING 0x02 |
34 | #define MTD_ERASE_SUSPEND 0x04 | |
e2e24e8e BN |
35 | #define MTD_ERASE_DONE 0x08 |
36 | #define MTD_ERASE_FAILED 0x10 | |
1da177e4 | 37 | |
69423d99 | 38 | #define MTD_FAIL_ADDR_UNKNOWN -1LL |
bb0eb217 | 39 | |
e2e24e8e BN |
40 | /* |
41 | * If the erase fails, fail_addr might indicate exactly which block failed. If | |
42 | * fail_addr = MTD_FAIL_ADDR_UNKNOWN, the failure was not at the device level | |
43 | * or was not specific to any particular block. | |
44 | */ | |
1da177e4 LT |
45 | struct erase_info { |
46 | struct mtd_info *mtd; | |
69423d99 AH |
47 | uint64_t addr; |
48 | uint64_t len; | |
49 | uint64_t fail_addr; | |
1da177e4 LT |
50 | u_long time; |
51 | u_long retries; | |
26cdb67c DW |
52 | unsigned dev; |
53 | unsigned cell; | |
1da177e4 LT |
54 | void (*callback) (struct erase_info *self); |
55 | u_long priv; | |
56 | u_char state; | |
57 | struct erase_info *next; | |
58 | }; | |
59 | ||
60 | struct mtd_erase_region_info { | |
e2e24e8e | 61 | uint64_t offset; /* At which this region starts, from the beginning of the MTD */ |
26cdb67c DW |
62 | uint32_t erasesize; /* For this region */ |
63 | uint32_t numblocks; /* Number of blocks of erasesize in this region */ | |
0ecbc81a | 64 | unsigned long *lockmap; /* If keeping bitmap of locks */ |
1da177e4 LT |
65 | }; |
66 | ||
8593fbc6 TG |
67 | /** |
68 | * struct mtd_oob_ops - oob operation operands | |
69 | * @mode: operation mode | |
70 | * | |
7014568b | 71 | * @len: number of data bytes to write/read |
8593fbc6 | 72 | * |
7014568b | 73 | * @retlen: number of data bytes written/read |
8593fbc6 | 74 | * |
7014568b VW |
75 | * @ooblen: number of oob bytes to write/read |
76 | * @oobretlen: number of oob bytes written/read | |
8593fbc6 | 77 | * @ooboffs: offset of oob data in the oob area (only relevant when |
4180f24a | 78 | * mode = MTD_OPS_PLACE_OOB or MTD_OPS_RAW) |
8593fbc6 TG |
79 | * @datbuf: data buffer - if NULL only oob data are read/written |
80 | * @oobbuf: oob data buffer | |
73a4421c | 81 | * |
025dfdaf | 82 | * Note, it is allowed to read more than one OOB area at one go, but not write. |
73a4421c AB |
83 | * The interface assumes that the OOB write requests program only one page's |
84 | * OOB area. | |
8593fbc6 TG |
85 | */ |
86 | struct mtd_oob_ops { | |
905c6bcd | 87 | unsigned int mode; |
8593fbc6 TG |
88 | size_t len; |
89 | size_t retlen; | |
90 | size_t ooblen; | |
7014568b | 91 | size_t oobretlen; |
8593fbc6 TG |
92 | uint32_t ooboffs; |
93 | uint8_t *datbuf; | |
94 | uint8_t *oobbuf; | |
95 | }; | |
96 | ||
cc26c3cd | 97 | #define MTD_MAX_OOBFREE_ENTRIES_LARGE 32 |
2f25ae97 | 98 | #define MTD_MAX_ECCPOS_ENTRIES_LARGE 640 |
75eb2cec BB |
99 | /** |
100 | * struct mtd_oob_region - oob region definition | |
101 | * @offset: region offset | |
102 | * @length: region length | |
103 | * | |
104 | * This structure describes a region of the OOB area, and is used | |
105 | * to retrieve ECC or free bytes sections. | |
106 | * Each section is defined by an offset within the OOB area and a | |
107 | * length. | |
108 | */ | |
109 | struct mtd_oob_region { | |
110 | u32 offset; | |
111 | u32 length; | |
112 | }; | |
113 | ||
adbbc3bc BB |
114 | /* |
115 | * struct mtd_ooblayout_ops - NAND OOB layout operations | |
116 | * @ecc: function returning an ECC region in the OOB area. | |
117 | * Should return -ERANGE if %section exceeds the total number of | |
118 | * ECC sections. | |
119 | * @free: function returning a free region in the OOB area. | |
120 | * Should return -ERANGE if %section exceeds the total number of | |
121 | * free sections. | |
122 | */ | |
123 | struct mtd_ooblayout_ops { | |
124 | int (*ecc)(struct mtd_info *mtd, int section, | |
125 | struct mtd_oob_region *oobecc); | |
126 | int (*free)(struct mtd_info *mtd, int section, | |
127 | struct mtd_oob_region *oobfree); | |
128 | }; | |
129 | ||
de477254 PG |
130 | struct module; /* only needed for owner field in mtd_info */ |
131 | ||
1da177e4 LT |
132 | struct mtd_info { |
133 | u_char type; | |
26cdb67c | 134 | uint32_t flags; |
69423d99 | 135 | uint64_t size; // Total size of the MTD |
1da177e4 | 136 | |
151e7659 | 137 | /* "Major" erase size for the device. Naïve users may take this |
1da177e4 LT |
138 | * to be the only erase size available, or may use the more detailed |
139 | * information below if they desire | |
140 | */ | |
26cdb67c | 141 | uint32_t erasesize; |
783ed81f AB |
142 | /* Minimal writable flash unit size. In case of NOR flash it is 1 (even |
143 | * though individual bits can be cleared), in case of NAND flash it is | |
144 | * one NAND page (or half, or one-fourths of it), in case of ECC-ed NOR | |
145 | * it is of ECC block size, etc. It is illegal to have writesize = 0. | |
146 | * Any driver registering a struct mtd_info must ensure a writesize of | |
147 | * 1 or larger. | |
28318776 | 148 | */ |
26cdb67c | 149 | uint32_t writesize; |
1da177e4 | 150 | |
0e4ca7e5 AG |
151 | /* |
152 | * Size of the write buffer used by the MTD. MTD devices having a write | |
153 | * buffer can write multiple writesize chunks at a time. E.g. while | |
154 | * writing 4 * writesize bytes to a device with 2 * writesize bytes | |
155 | * buffer the MTD driver can (but doesn't have to) do 2 writesize | |
156 | * operations, but not 4. Currently, all NANDs have writebufsize | |
157 | * equivalent to writesize (NAND page size). Some NOR flashes do have | |
158 | * writebufsize greater than writesize. | |
159 | */ | |
160 | uint32_t writebufsize; | |
161 | ||
26cdb67c DW |
162 | uint32_t oobsize; // Amount of OOB data per block (e.g. 16) |
163 | uint32_t oobavail; // Available OOB bytes per block | |
1da177e4 | 164 | |
69423d99 AH |
165 | /* |
166 | * If erasesize is a power of 2 then the shift is stored in | |
167 | * erasesize_shift otherwise erasesize_shift is zero. Ditto writesize. | |
168 | */ | |
169 | unsigned int erasesize_shift; | |
170 | unsigned int writesize_shift; | |
171 | /* Masks based on erasesize_shift and writesize_shift */ | |
172 | unsigned int erasesize_mask; | |
173 | unsigned int writesize_mask; | |
638d9838 | 174 | |
d062d4ed MD |
175 | /* |
176 | * read ops return -EUCLEAN if max number of bitflips corrected on any | |
177 | * one region comprising an ecc step equals or exceeds this value. | |
178 | * Settable by driver, else defaults to ecc_strength. User can override | |
179 | * in sysfs. N.B. The meaning of the -EUCLEAN return code has changed; | |
180 | * see Documentation/ABI/testing/sysfs-class-mtd for more detail. | |
181 | */ | |
182 | unsigned int bitflip_threshold; | |
183 | ||
1da177e4 | 184 | // Kernel-only stuff starts here. |
eadcf0d7 | 185 | const char *name; |
1da177e4 LT |
186 | int index; |
187 | ||
adbbc3bc BB |
188 | /* OOB layout description */ |
189 | const struct mtd_ooblayout_ops *ooblayout; | |
190 | ||
c41a0582 HS |
191 | /* the ecc step size. */ |
192 | unsigned int ecc_step_size; | |
193 | ||
86c2072b | 194 | /* max number of correctible bit errors per ecc step */ |
1d0b95b0 MD |
195 | unsigned int ecc_strength; |
196 | ||
1da177e4 | 197 | /* Data for variable erase regions. If numeraseregions is zero, |
61ecfa87 | 198 | * it means that the whole device has erasesize as given above. |
1da177e4 LT |
199 | */ |
200 | int numeraseregions; | |
61ecfa87 | 201 | struct mtd_erase_region_info *eraseregions; |
1da177e4 | 202 | |
b38178ee | 203 | /* |
7e1f0dc0 AB |
204 | * Do not call via these pointers, use corresponding mtd_*() |
205 | * wrappers instead. | |
b38178ee | 206 | */ |
3c3c10bb AB |
207 | int (*_erase) (struct mtd_info *mtd, struct erase_info *instr); |
208 | int (*_point) (struct mtd_info *mtd, loff_t from, size_t len, | |
209 | size_t *retlen, void **virt, resource_size_t *phys); | |
5e4e6e3f | 210 | int (*_unpoint) (struct mtd_info *mtd, loff_t from, size_t len); |
3c3c10bb AB |
211 | unsigned long (*_get_unmapped_area) (struct mtd_info *mtd, |
212 | unsigned long len, | |
213 | unsigned long offset, | |
214 | unsigned long flags); | |
215 | int (*_read) (struct mtd_info *mtd, loff_t from, size_t len, | |
216 | size_t *retlen, u_char *buf); | |
217 | int (*_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
218 | size_t *retlen, const u_char *buf); | |
219 | int (*_panic_write) (struct mtd_info *mtd, loff_t to, size_t len, | |
220 | size_t *retlen, const u_char *buf); | |
221 | int (*_read_oob) (struct mtd_info *mtd, loff_t from, | |
a2cc5ba0 | 222 | struct mtd_oob_ops *ops); |
3c3c10bb AB |
223 | int (*_write_oob) (struct mtd_info *mtd, loff_t to, |
224 | struct mtd_oob_ops *ops); | |
4b78fc42 CR |
225 | int (*_get_fact_prot_info) (struct mtd_info *mtd, size_t len, |
226 | size_t *retlen, struct otp_info *buf); | |
3c3c10bb AB |
227 | int (*_read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, |
228 | size_t len, size_t *retlen, u_char *buf); | |
4b78fc42 CR |
229 | int (*_get_user_prot_info) (struct mtd_info *mtd, size_t len, |
230 | size_t *retlen, struct otp_info *buf); | |
3c3c10bb AB |
231 | int (*_read_user_prot_reg) (struct mtd_info *mtd, loff_t from, |
232 | size_t len, size_t *retlen, u_char *buf); | |
233 | int (*_write_user_prot_reg) (struct mtd_info *mtd, loff_t to, | |
234 | size_t len, size_t *retlen, u_char *buf); | |
235 | int (*_lock_user_prot_reg) (struct mtd_info *mtd, loff_t from, | |
236 | size_t len); | |
237 | int (*_writev) (struct mtd_info *mtd, const struct kvec *vecs, | |
b0a31f7b | 238 | unsigned long count, loff_t to, size_t *retlen); |
3c3c10bb AB |
239 | void (*_sync) (struct mtd_info *mtd); |
240 | int (*_lock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
241 | int (*_unlock) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
242 | int (*_is_locked) (struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
8471bb73 | 243 | int (*_block_isreserved) (struct mtd_info *mtd, loff_t ofs); |
3c3c10bb AB |
244 | int (*_block_isbad) (struct mtd_info *mtd, loff_t ofs); |
245 | int (*_block_markbad) (struct mtd_info *mtd, loff_t ofs); | |
246 | int (*_suspend) (struct mtd_info *mtd); | |
247 | void (*_resume) (struct mtd_info *mtd); | |
3efe41be | 248 | void (*_reboot) (struct mtd_info *mtd); |
a88d2dc6 AB |
249 | /* |
250 | * If the driver is something smart, like UBI, it may need to maintain | |
251 | * its own reference counting. The below functions are only for driver. | |
252 | */ | |
3c3c10bb AB |
253 | int (*_get_device) (struct mtd_info *mtd); |
254 | void (*_put_device) (struct mtd_info *mtd); | |
402d3265 DH |
255 | |
256 | /* Backing device capabilities for this device | |
257 | * - provides mmap capabilities | |
258 | */ | |
259 | struct backing_dev_info *backing_dev_info; | |
260 | ||
963a6fb0 NP |
261 | struct notifier_block reboot_notifier; /* default mode before reboot */ |
262 | ||
7fac4648 TG |
263 | /* ECC status information */ |
264 | struct mtd_ecc_stats ecc_stats; | |
29072b96 TG |
265 | /* Subpage shift (NAND) */ |
266 | int subpage_sft; | |
7fac4648 | 267 | |
1da177e4 LT |
268 | void *priv; |
269 | ||
270 | struct module *owner; | |
1f24b5a8 | 271 | struct device dev; |
1da177e4 LT |
272 | int usecount; |
273 | }; | |
274 | ||
75eb2cec BB |
275 | int mtd_ooblayout_ecc(struct mtd_info *mtd, int section, |
276 | struct mtd_oob_region *oobecc); | |
277 | int mtd_ooblayout_find_eccregion(struct mtd_info *mtd, int eccbyte, | |
278 | int *section, | |
279 | struct mtd_oob_region *oobregion); | |
280 | int mtd_ooblayout_get_eccbytes(struct mtd_info *mtd, u8 *eccbuf, | |
281 | const u8 *oobbuf, int start, int nbytes); | |
282 | int mtd_ooblayout_set_eccbytes(struct mtd_info *mtd, const u8 *eccbuf, | |
283 | u8 *oobbuf, int start, int nbytes); | |
284 | int mtd_ooblayout_free(struct mtd_info *mtd, int section, | |
285 | struct mtd_oob_region *oobfree); | |
286 | int mtd_ooblayout_get_databytes(struct mtd_info *mtd, u8 *databuf, | |
287 | const u8 *oobbuf, int start, int nbytes); | |
288 | int mtd_ooblayout_set_databytes(struct mtd_info *mtd, const u8 *databuf, | |
289 | u8 *oobbuf, int start, int nbytes); | |
290 | int mtd_ooblayout_count_freebytes(struct mtd_info *mtd); | |
291 | int mtd_ooblayout_count_eccbytes(struct mtd_info *mtd); | |
292 | ||
adbbc3bc BB |
293 | static inline void mtd_set_ooblayout(struct mtd_info *mtd, |
294 | const struct mtd_ooblayout_ops *ooblayout) | |
036d6543 | 295 | { |
adbbc3bc | 296 | mtd->ooblayout = ooblayout; |
036d6543 BB |
297 | } |
298 | ||
28b8b26b BN |
299 | static inline void mtd_set_of_node(struct mtd_info *mtd, |
300 | struct device_node *np) | |
301 | { | |
302 | mtd->dev.of_node = np; | |
303 | } | |
304 | ||
305 | static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd) | |
306 | { | |
307 | return mtd->dev.of_node; | |
308 | } | |
309 | ||
29f1058a BB |
310 | static inline int mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops) |
311 | { | |
312 | return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize; | |
313 | } | |
314 | ||
8273a0c9 AB |
315 | int mtd_erase(struct mtd_info *mtd, struct erase_info *instr); |
316 | int mtd_point(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, | |
317 | void **virt, resource_size_t *phys); | |
318 | int mtd_unpoint(struct mtd_info *mtd, loff_t from, size_t len); | |
319 | unsigned long mtd_get_unmapped_area(struct mtd_info *mtd, unsigned long len, | |
320 | unsigned long offset, unsigned long flags); | |
321 | int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, | |
322 | u_char *buf); | |
323 | int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, | |
324 | const u_char *buf); | |
325 | int mtd_panic_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, | |
326 | const u_char *buf); | |
7ae79d7f | 327 | |
d2d48480 | 328 | int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops); |
0c034fe3 | 329 | int mtd_write_oob(struct mtd_info *mtd, loff_t to, struct mtd_oob_ops *ops); |
a2cc5ba0 | 330 | |
4b78fc42 CR |
331 | int mtd_get_fact_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, |
332 | struct otp_info *buf); | |
de3cac93 AB |
333 | int mtd_read_fact_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, |
334 | size_t *retlen, u_char *buf); | |
4b78fc42 CR |
335 | int mtd_get_user_prot_info(struct mtd_info *mtd, size_t len, size_t *retlen, |
336 | struct otp_info *buf); | |
de3cac93 AB |
337 | int mtd_read_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len, |
338 | size_t *retlen, u_char *buf); | |
339 | int mtd_write_user_prot_reg(struct mtd_info *mtd, loff_t to, size_t len, | |
340 | size_t *retlen, u_char *buf); | |
341 | int mtd_lock_user_prot_reg(struct mtd_info *mtd, loff_t from, size_t len); | |
4403dbfb | 342 | |
1dbebd32 AB |
343 | int mtd_writev(struct mtd_info *mtd, const struct kvec *vecs, |
344 | unsigned long count, loff_t to, size_t *retlen); | |
b0a31f7b | 345 | |
85f2f2a8 AB |
346 | static inline void mtd_sync(struct mtd_info *mtd) |
347 | { | |
3c3c10bb AB |
348 | if (mtd->_sync) |
349 | mtd->_sync(mtd); | |
85f2f2a8 AB |
350 | } |
351 | ||
8273a0c9 AB |
352 | int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len); |
353 | int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
354 | int mtd_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len); | |
8471bb73 | 355 | int mtd_block_isreserved(struct mtd_info *mtd, loff_t ofs); |
8273a0c9 AB |
356 | int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs); |
357 | int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs); | |
e95e9786 | 358 | |
3fe4bae8 AB |
359 | static inline int mtd_suspend(struct mtd_info *mtd) |
360 | { | |
3c3c10bb | 361 | return mtd->_suspend ? mtd->_suspend(mtd) : 0; |
3fe4bae8 AB |
362 | } |
363 | ||
ead995f8 AB |
364 | static inline void mtd_resume(struct mtd_info *mtd) |
365 | { | |
3c3c10bb AB |
366 | if (mtd->_resume) |
367 | mtd->_resume(mtd); | |
ead995f8 AB |
368 | } |
369 | ||
26cdb67c | 370 | static inline uint32_t mtd_div_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
371 | { |
372 | if (mtd->erasesize_shift) | |
373 | return sz >> mtd->erasesize_shift; | |
374 | do_div(sz, mtd->erasesize); | |
375 | return sz; | |
376 | } | |
377 | ||
26cdb67c | 378 | static inline uint32_t mtd_mod_by_eb(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
379 | { |
380 | if (mtd->erasesize_shift) | |
381 | return sz & mtd->erasesize_mask; | |
382 | return do_div(sz, mtd->erasesize); | |
383 | } | |
384 | ||
26cdb67c | 385 | static inline uint32_t mtd_div_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
386 | { |
387 | if (mtd->writesize_shift) | |
388 | return sz >> mtd->writesize_shift; | |
389 | do_div(sz, mtd->writesize); | |
390 | return sz; | |
391 | } | |
392 | ||
26cdb67c | 393 | static inline uint32_t mtd_mod_by_ws(uint64_t sz, struct mtd_info *mtd) |
69423d99 AH |
394 | { |
395 | if (mtd->writesize_shift) | |
396 | return sz & mtd->writesize_mask; | |
397 | return do_div(sz, mtd->writesize); | |
398 | } | |
1da177e4 | 399 | |
fc002e3c AB |
400 | static inline int mtd_has_oob(const struct mtd_info *mtd) |
401 | { | |
3c3c10bb | 402 | return mtd->_read_oob && mtd->_write_oob; |
fc002e3c AB |
403 | } |
404 | ||
818b9739 HS |
405 | static inline int mtd_type_is_nand(const struct mtd_info *mtd) |
406 | { | |
407 | return mtd->type == MTD_NANDFLASH || mtd->type == MTD_MLCNANDFLASH; | |
408 | } | |
409 | ||
8f461a73 AB |
410 | static inline int mtd_can_have_bb(const struct mtd_info *mtd) |
411 | { | |
3c3c10bb | 412 | return !!mtd->_block_isbad; |
8f461a73 AB |
413 | } |
414 | ||
1da177e4 LT |
415 | /* Kernel-side ioctl definitions */ |
416 | ||
f5671ab3 | 417 | struct mtd_partition; |
c7975330 | 418 | struct mtd_part_parser_data; |
f5671ab3 | 419 | |
1c4c215c | 420 | extern int mtd_device_parse_register(struct mtd_info *mtd, |
26a47346 AB |
421 | const char * const *part_probe_types, |
422 | struct mtd_part_parser_data *parser_data, | |
423 | const struct mtd_partition *defparts, | |
424 | int defnr_parts); | |
15c60a50 DES |
425 | #define mtd_device_register(master, parts, nr_parts) \ |
426 | mtd_device_parse_register(master, NULL, NULL, parts, nr_parts) | |
f5671ab3 | 427 | extern int mtd_device_unregister(struct mtd_info *master); |
1da177e4 | 428 | extern struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num); |
3bd45657 ML |
429 | extern int __get_mtd_device(struct mtd_info *mtd); |
430 | extern void __put_mtd_device(struct mtd_info *mtd); | |
7799308f | 431 | extern struct mtd_info *get_mtd_device_nm(const char *name); |
1da177e4 LT |
432 | extern void put_mtd_device(struct mtd_info *mtd); |
433 | ||
434 | ||
435 | struct mtd_notifier { | |
436 | void (*add)(struct mtd_info *mtd); | |
437 | void (*remove)(struct mtd_info *mtd); | |
438 | struct list_head list; | |
439 | }; | |
440 | ||
441 | ||
442 | extern void register_mtd_user (struct mtd_notifier *new); | |
443 | extern int unregister_mtd_user (struct mtd_notifier *old); | |
33b53716 GE |
444 | void *mtd_kmalloc_up_to(const struct mtd_info *mtd, size_t *size); |
445 | ||
1da177e4 | 446 | void mtd_erase_callback(struct erase_info *instr); |
1da177e4 | 447 | |
7387ce77 BN |
448 | static inline int mtd_is_bitflip(int err) { |
449 | return err == -EUCLEAN; | |
450 | } | |
451 | ||
452 | static inline int mtd_is_eccerr(int err) { | |
453 | return err == -EBADMSG; | |
454 | } | |
455 | ||
456 | static inline int mtd_is_bitflip_or_eccerr(int err) { | |
457 | return mtd_is_bitflip(err) || mtd_is_eccerr(err); | |
458 | } | |
1da177e4 | 459 | |
b4caecd4 CH |
460 | unsigned mtd_mmap_capabilities(struct mtd_info *mtd); |
461 | ||
1da177e4 | 462 | #endif /* __MTD_MTD_H__ */ |