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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Simple MTD partitioning layer
3 *
4 * (C) 2000 Nicolas Pitre <nico@cam.org>
5 *
6 * This code is GPL
7 *
Thomas Gleixner97894cd2005-11-07 11:15:26 +00008 * $Id: mtdpart.c,v 1.55 2005/11/07 11:14:20 gleixner Exp $
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
10 * 02-21-2002 Thomas Gleixner <gleixner@autronix.de>
11 * added support for read_oob, write_oob
Thomas Gleixner97894cd2005-11-07 11:15:26 +000012 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070013
14#include <linux/module.h>
15#include <linux/types.h>
16#include <linux/kernel.h>
17#include <linux/slab.h>
18#include <linux/list.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/kmod.h>
20#include <linux/mtd/mtd.h>
21#include <linux/mtd/partitions.h>
22#include <linux/mtd/compatmac.h>
23
24/* Our partition linked list */
25static LIST_HEAD(mtd_partitions);
26
27/* Our partition node structure */
28struct mtd_part {
29 struct mtd_info mtd;
30 struct mtd_info *master;
31 u_int32_t offset;
32 int index;
33 struct list_head list;
34 int registered;
35};
36
37/*
38 * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
39 * the pointer to that structure with this macro.
40 */
41#define PART(x) ((struct mtd_part *)(x))
42
Thomas Gleixner97894cd2005-11-07 11:15:26 +000043
44/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 * MTD methods which simply translate the effective address and pass through
46 * to the _real_ device.
47 */
48
Thomas Gleixner97894cd2005-11-07 11:15:26 +000049static int part_read (struct mtd_info *mtd, loff_t from, size_t len,
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 size_t *retlen, u_char *buf)
51{
52 struct mtd_part *part = PART(mtd);
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +020053 int res;
54
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 if (from >= mtd->size)
56 len = 0;
57 else if (from + len > mtd->size)
58 len = mtd->size - from;
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +020059 res = part->master->read (part->master, from + part->offset,
Thomas Gleixner9223a452006-05-23 17:21:03 +020060 len, retlen, buf);
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +020061 if (unlikely(res)) {
62 if (res == -EUCLEAN)
63 mtd->ecc_stats.corrected++;
64 if (res == -EBADMSG)
65 mtd->ecc_stats.failed++;
66 }
67 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
69
Thomas Gleixner97894cd2005-11-07 11:15:26 +000070static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 size_t *retlen, u_char **buf)
72{
73 struct mtd_part *part = PART(mtd);
74 if (from >= mtd->size)
75 len = 0;
76 else if (from + len > mtd->size)
77 len = mtd->size - from;
Thomas Gleixner97894cd2005-11-07 11:15:26 +000078 return part->master->point (part->master, from + part->offset,
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 len, retlen, buf);
80}
Thomas Gleixner9223a452006-05-23 17:21:03 +020081
Linus Torvalds1da177e2005-04-16 15:20:36 -070082static void part_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
83{
84 struct mtd_part *part = PART(mtd);
85
86 part->master->unpoint (part->master, addr, from + part->offset, len);
87}
88
Thomas Gleixner8593fbc2006-05-29 03:26:58 +020089static int part_read_oob(struct mtd_info *mtd, loff_t from,
90 struct mtd_oob_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091{
92 struct mtd_part *part = PART(mtd);
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +020093 int res;
Thomas Gleixner8593fbc2006-05-29 03:26:58 +020094
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 if (from >= mtd->size)
Thomas Gleixner8593fbc2006-05-29 03:26:58 +020096 return -EINVAL;
Vitaly Wool70145682006-11-03 18:20:38 +030097 if (ops->datbuf && from + ops->len > mtd->size)
Thomas Gleixner8593fbc2006-05-29 03:26:58 +020098 return -EINVAL;
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +020099 res = part->master->read_oob(part->master, from + part->offset, ops);
100
101 if (unlikely(res)) {
102 if (res == -EUCLEAN)
103 mtd->ecc_stats.corrected++;
104 if (res == -EBADMSG)
105 mtd->ecc_stats.failed++;
106 }
107 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108}
109
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000110static int part_read_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 size_t *retlen, u_char *buf)
112{
113 struct mtd_part *part = PART(mtd);
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000114 return part->master->read_user_prot_reg (part->master, from,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 len, retlen, buf);
116}
117
Nicolas Pitref77814d2005-02-08 17:11:19 +0000118static int part_get_user_prot_info (struct mtd_info *mtd,
119 struct otp_info *buf, size_t len)
120{
121 struct mtd_part *part = PART(mtd);
122 return part->master->get_user_prot_info (part->master, buf, len);
123}
124
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000125static int part_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 size_t *retlen, u_char *buf)
127{
128 struct mtd_part *part = PART(mtd);
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000129 return part->master->read_fact_prot_reg (part->master, from,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 len, retlen, buf);
131}
132
Nicolas Pitref77814d2005-02-08 17:11:19 +0000133static int part_get_fact_prot_info (struct mtd_info *mtd,
134 struct otp_info *buf, size_t len)
135{
136 struct mtd_part *part = PART(mtd);
137 return part->master->get_fact_prot_info (part->master, buf, len);
138}
139
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140static int part_write (struct mtd_info *mtd, loff_t to, size_t len,
141 size_t *retlen, const u_char *buf)
142{
143 struct mtd_part *part = PART(mtd);
144 if (!(mtd->flags & MTD_WRITEABLE))
145 return -EROFS;
146 if (to >= mtd->size)
147 len = 0;
148 else if (to + len > mtd->size)
149 len = mtd->size - to;
Thomas Gleixner9223a452006-05-23 17:21:03 +0200150 return part->master->write (part->master, to + part->offset,
151 len, retlen, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152}
153
Thomas Gleixner8593fbc2006-05-29 03:26:58 +0200154static int part_write_oob(struct mtd_info *mtd, loff_t to,
155 struct mtd_oob_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 struct mtd_part *part = PART(mtd);
Thomas Gleixner8593fbc2006-05-29 03:26:58 +0200158
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 if (!(mtd->flags & MTD_WRITEABLE))
160 return -EROFS;
Thomas Gleixner8593fbc2006-05-29 03:26:58 +0200161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 if (to >= mtd->size)
Thomas Gleixner8593fbc2006-05-29 03:26:58 +0200163 return -EINVAL;
Vitaly Wool70145682006-11-03 18:20:38 +0300164 if (ops->datbuf && to + ops->len > mtd->size)
Thomas Gleixner8593fbc2006-05-29 03:26:58 +0200165 return -EINVAL;
166 return part->master->write_oob(part->master, to + part->offset, ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167}
168
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000169static int part_write_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 size_t *retlen, u_char *buf)
171{
172 struct mtd_part *part = PART(mtd);
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000173 return part->master->write_user_prot_reg (part->master, from,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 len, retlen, buf);
175}
176
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000177static int part_lock_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len)
Nicolas Pitref77814d2005-02-08 17:11:19 +0000178{
179 struct mtd_part *part = PART(mtd);
180 return part->master->lock_user_prot_reg (part->master, from, len);
181}
182
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183static int part_writev (struct mtd_info *mtd, const struct kvec *vecs,
184 unsigned long count, loff_t to, size_t *retlen)
185{
186 struct mtd_part *part = PART(mtd);
187 if (!(mtd->flags & MTD_WRITEABLE))
188 return -EROFS;
Thomas Gleixner9d8522d2006-05-23 16:06:03 +0200189 return part->master->writev (part->master, vecs, count,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 to + part->offset, retlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191}
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193static int part_erase (struct mtd_info *mtd, struct erase_info *instr)
194{
195 struct mtd_part *part = PART(mtd);
196 int ret;
197 if (!(mtd->flags & MTD_WRITEABLE))
198 return -EROFS;
199 if (instr->addr >= mtd->size)
200 return -EINVAL;
201 instr->addr += part->offset;
202 ret = part->master->erase(part->master, instr);
Adrian Hunter74641d72007-03-08 12:20:12 +0200203 if (ret) {
204 if (instr->fail_addr != 0xffffffff)
205 instr->fail_addr -= part->offset;
206 instr->addr -= part->offset;
207 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 return ret;
209}
210
211void mtd_erase_callback(struct erase_info *instr)
212{
213 if (instr->mtd->erase == part_erase) {
214 struct mtd_part *part = PART(instr->mtd);
215
216 if (instr->fail_addr != 0xffffffff)
217 instr->fail_addr -= part->offset;
218 instr->addr -= part->offset;
219 }
220 if (instr->callback)
221 instr->callback(instr);
222}
223EXPORT_SYMBOL_GPL(mtd_erase_callback);
224
225static int part_lock (struct mtd_info *mtd, loff_t ofs, size_t len)
226{
227 struct mtd_part *part = PART(mtd);
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000228 if ((len + ofs) > mtd->size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 return -EINVAL;
230 return part->master->lock(part->master, ofs + part->offset, len);
231}
232
233static int part_unlock (struct mtd_info *mtd, loff_t ofs, size_t len)
234{
235 struct mtd_part *part = PART(mtd);
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000236 if ((len + ofs) > mtd->size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 return -EINVAL;
238 return part->master->unlock(part->master, ofs + part->offset, len);
239}
240
241static void part_sync(struct mtd_info *mtd)
242{
243 struct mtd_part *part = PART(mtd);
244 part->master->sync(part->master);
245}
246
247static int part_suspend(struct mtd_info *mtd)
248{
249 struct mtd_part *part = PART(mtd);
250 return part->master->suspend(part->master);
251}
252
253static void part_resume(struct mtd_info *mtd)
254{
255 struct mtd_part *part = PART(mtd);
256 part->master->resume(part->master);
257}
258
259static int part_block_isbad (struct mtd_info *mtd, loff_t ofs)
260{
261 struct mtd_part *part = PART(mtd);
262 if (ofs >= mtd->size)
263 return -EINVAL;
264 ofs += part->offset;
265 return part->master->block_isbad(part->master, ofs);
266}
267
268static int part_block_markbad (struct mtd_info *mtd, loff_t ofs)
269{
270 struct mtd_part *part = PART(mtd);
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +0200271 int res;
272
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273 if (!(mtd->flags & MTD_WRITEABLE))
274 return -EROFS;
275 if (ofs >= mtd->size)
276 return -EINVAL;
277 ofs += part->offset;
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +0200278 res = part->master->block_markbad(part->master, ofs);
279 if (!res)
280 mtd->ecc_stats.badblocks++;
281 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282}
283
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000284/*
285 * This function unregisters and destroy all slave MTD objects which are
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 * attached to the given master MTD object.
287 */
288
289int del_mtd_partitions(struct mtd_info *master)
290{
291 struct list_head *node;
292 struct mtd_part *slave;
293
294 for (node = mtd_partitions.next;
295 node != &mtd_partitions;
296 node = node->next) {
297 slave = list_entry(node, struct mtd_part, list);
298 if (slave->master == master) {
299 struct list_head *prev = node->prev;
300 __list_del(prev, node->next);
301 if(slave->registered)
302 del_mtd_device(&slave->mtd);
303 kfree(slave);
304 node = prev;
305 }
306 }
307
308 return 0;
309}
310
311/*
312 * This function, given a master MTD object and a partition table, creates
313 * and registers slave MTD objects which are bound to the master according to
314 * the partition definitions.
315 * (Q: should we register the master MTD object as well?)
316 */
317
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000318int add_mtd_partitions(struct mtd_info *master,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 const struct mtd_partition *parts,
320 int nbparts)
321{
322 struct mtd_part *slave;
323 u_int32_t cur_offset = 0;
324 int i;
325
326 printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
327
328 for (i = 0; i < nbparts; i++) {
329
330 /* allocate the partition structure */
Burman Yan95b93a02006-11-15 21:10:29 +0200331 slave = kzalloc (sizeof(*slave), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if (!slave) {
333 printk ("memory allocation error while creating partitions for \"%s\"\n",
334 master->name);
335 del_mtd_partitions(master);
336 return -ENOMEM;
337 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 list_add(&slave->list, &mtd_partitions);
339
340 /* set up the MTD object for this partition */
341 slave->mtd.type = master->type;
342 slave->mtd.flags = master->flags & ~parts[i].mask_flags;
343 slave->mtd.size = parts[i].size;
Joern Engel28318772006-05-22 23:18:05 +0200344 slave->mtd.writesize = master->writesize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 slave->mtd.oobsize = master->oobsize;
Vitaly Wool1f922672007-03-06 16:56:34 +0300346 slave->mtd.oobavail = master->oobavail;
Thomas Gleixner29072b92006-09-28 15:38:36 +0200347 slave->mtd.subpage_sft = master->subpage_sft;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348
349 slave->mtd.name = parts[i].name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 slave->mtd.owner = master->owner;
351
352 slave->mtd.read = part_read;
353 slave->mtd.write = part_write;
354
355 if(master->point && master->unpoint){
356 slave->mtd.point = part_point;
357 slave->mtd.unpoint = part_unpoint;
358 }
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 if (master->read_oob)
361 slave->mtd.read_oob = part_read_oob;
362 if (master->write_oob)
363 slave->mtd.write_oob = part_write_oob;
364 if(master->read_user_prot_reg)
365 slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
366 if(master->read_fact_prot_reg)
367 slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
368 if(master->write_user_prot_reg)
369 slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
Nicolas Pitref77814d2005-02-08 17:11:19 +0000370 if(master->lock_user_prot_reg)
371 slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
372 if(master->get_user_prot_info)
373 slave->mtd.get_user_prot_info = part_get_user_prot_info;
374 if(master->get_fact_prot_info)
375 slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (master->sync)
377 slave->mtd.sync = part_sync;
378 if (!i && master->suspend && master->resume) {
379 slave->mtd.suspend = part_suspend;
380 slave->mtd.resume = part_resume;
381 }
382 if (master->writev)
383 slave->mtd.writev = part_writev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 if (master->lock)
385 slave->mtd.lock = part_lock;
386 if (master->unlock)
387 slave->mtd.unlock = part_unlock;
388 if (master->block_isbad)
389 slave->mtd.block_isbad = part_block_isbad;
390 if (master->block_markbad)
391 slave->mtd.block_markbad = part_block_markbad;
392 slave->mtd.erase = part_erase;
393 slave->master = master;
394 slave->offset = parts[i].offset;
395 slave->index = i;
396
397 if (slave->offset == MTDPART_OFS_APPEND)
398 slave->offset = cur_offset;
399 if (slave->offset == MTDPART_OFS_NXTBLK) {
Artem B. Bityutskiy5cea5da2005-09-30 15:49:12 +0100400 slave->offset = cur_offset;
401 if ((cur_offset % master->erasesize) != 0) {
402 /* Round up to next erasesize */
403 slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 printk(KERN_NOTICE "Moving partition %d: "
405 "0x%08x -> 0x%08x\n", i,
406 cur_offset, slave->offset);
407 }
408 }
409 if (slave->mtd.size == MTDPART_SIZ_FULL)
410 slave->mtd.size = master->size - slave->offset;
411 cur_offset = slave->offset + slave->mtd.size;
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000412
413 printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414 slave->offset + slave->mtd.size, slave->mtd.name);
415
416 /* let's do some sanity checks */
417 if (slave->offset >= master->size) {
418 /* let's register it anyway to preserve ordering */
419 slave->offset = 0;
420 slave->mtd.size = 0;
421 printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
422 parts[i].name);
423 }
424 if (slave->offset + slave->mtd.size > master->size) {
425 slave->mtd.size = master->size - slave->offset;
426 printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
427 parts[i].name, master->name, slave->mtd.size);
428 }
429 if (master->numeraseregions>1) {
430 /* Deal with variable erase size stuff */
431 int i;
432 struct mtd_erase_region_info *regions = master->eraseregions;
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 /* Find the first erase regions which is part of this partition. */
435 for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
436 ;
437
438 for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
439 if (slave->mtd.erasesize < regions[i].erasesize) {
440 slave->mtd.erasesize = regions[i].erasesize;
441 }
442 }
443 } else {
444 /* Single erase size */
445 slave->mtd.erasesize = master->erasesize;
446 }
447
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000448 if ((slave->mtd.flags & MTD_WRITEABLE) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 (slave->offset % slave->mtd.erasesize)) {
450 /* Doesn't start on a boundary of major erase size */
451 /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
452 slave->mtd.flags &= ~MTD_WRITEABLE;
453 printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
454 parts[i].name);
455 }
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000456 if ((slave->mtd.flags & MTD_WRITEABLE) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 (slave->mtd.size % slave->mtd.erasesize)) {
458 slave->mtd.flags &= ~MTD_WRITEABLE;
459 printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
460 parts[i].name);
461 }
462
Thomas Gleixner5bd34c02006-05-27 22:16:10 +0200463 slave->mtd.ecclayout = master->ecclayout;
Thomas Gleixnerf1a28c02006-05-30 00:37:34 +0200464 if (master->block_isbad) {
465 uint32_t offs = 0;
466
467 while(offs < slave->mtd.size) {
468 if (master->block_isbad(master,
469 offs + slave->offset))
470 slave->mtd.ecc_stats.badblocks++;
471 offs += slave->mtd.erasesize;
472 }
473 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 if(parts[i].mtdp)
476 { /* store the object pointer (caller may or may not register it */
477 *parts[i].mtdp = &slave->mtd;
478 slave->registered = 0;
479 }
480 else
481 {
482 /* register our partition */
483 add_mtd_device(&slave->mtd);
484 slave->registered = 1;
485 }
486 }
487
488 return 0;
489}
490
491EXPORT_SYMBOL(add_mtd_partitions);
492EXPORT_SYMBOL(del_mtd_partitions);
493
494static DEFINE_SPINLOCK(part_parser_lock);
495static LIST_HEAD(part_parsers);
496
497static struct mtd_part_parser *get_partition_parser(const char *name)
498{
499 struct list_head *this;
500 void *ret = NULL;
501 spin_lock(&part_parser_lock);
502
503 list_for_each(this, &part_parsers) {
504 struct mtd_part_parser *p = list_entry(this, struct mtd_part_parser, list);
505
506 if (!strcmp(p->name, name) && try_module_get(p->owner)) {
507 ret = p;
508 break;
509 }
510 }
511 spin_unlock(&part_parser_lock);
512
513 return ret;
514}
515
516int register_mtd_parser(struct mtd_part_parser *p)
517{
518 spin_lock(&part_parser_lock);
519 list_add(&p->list, &part_parsers);
520 spin_unlock(&part_parser_lock);
521
522 return 0;
523}
524
525int deregister_mtd_parser(struct mtd_part_parser *p)
526{
527 spin_lock(&part_parser_lock);
528 list_del(&p->list);
529 spin_unlock(&part_parser_lock);
530 return 0;
531}
532
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000533int parse_mtd_partitions(struct mtd_info *master, const char **types,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 struct mtd_partition **pparts, unsigned long origin)
535{
536 struct mtd_part_parser *parser;
537 int ret = 0;
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 for ( ; ret <= 0 && *types; types++) {
540 parser = get_partition_parser(*types);
541#ifdef CONFIG_KMOD
542 if (!parser && !request_module("%s", *types))
543 parser = get_partition_parser(*types);
544#endif
545 if (!parser) {
546 printk(KERN_NOTICE "%s partition parsing not available\n",
547 *types);
548 continue;
549 }
550 ret = (*parser->parse_fn)(master, pparts, origin);
551 if (ret > 0) {
Thomas Gleixner97894cd2005-11-07 11:15:26 +0000552 printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 ret, parser->name, master->name);
554 }
555 put_partition_parser(parser);
556 }
557 return ret;
558}
559
560EXPORT_SYMBOL_GPL(parse_mtd_partitions);
561EXPORT_SYMBOL_GPL(register_mtd_parser);
562EXPORT_SYMBOL_GPL(deregister_mtd_parser);