drivers/mtd/mtdpart.c

   1 /*
   2  * Simple MTD partitioning layer
   3  *
   4  * (C) 2000 Nicolas Pitre <nico@cam.org>
   5  *
   6  * This code is GPL
   7  *
   8  * $Id: mtdpart.c,v 1.55 2005/11/07 11:14:20 gleixner Exp $
   9  *
  10  *      02-21-2002      Thomas Gleixner <gleixner@autronix.de>
  11  *                      added support for read_oob, write_oob
  12  */
  13
  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>
  19 #include <linux/config.h>
  20 #include <linux/kmod.h>
  21 #include <linux/mtd/mtd.h>
  22 #include <linux/mtd/partitions.h>
  23 #include <linux/mtd/compatmac.h>
  24
  25 /* Our partition linked list */
  26 static LIST_HEAD(mtd_partitions);
  27
  28 /* Our partition node structure */
  29 struct mtd_part {
  30         struct mtd_info mtd;
  31         struct mtd_info *master;
  32         u_int32_t offset;
  33         int index;
  34         struct list_head list;
  35         int registered;
  36 };
  37
  38 /*
  39  * Given a pointer to the MTD object in the mtd_part structure, we can retrieve
  40  * the pointer to that structure with this macro.
  41  */
  42 #define PART(x)  ((struct mtd_part *)(x))
  43
  44
  45 /*
  46  * MTD methods which simply translate the effective address and pass through
  47  * to the _real_ device.
  48  */
  49
  50 static int part_read (struct mtd_info *mtd, loff_t from, size_t len,
  51                         size_t *retlen, u_char *buf)
  52 {
  53         struct mtd_part *part = PART(mtd);
  54         if (from >= mtd->size)
  55                 len = 0;
  56         else if (from + len > mtd->size)
  57                 len = mtd->size - from;
  58         if (part->master->read_ecc == NULL)
  59                 return part->master->read (part->master, from + part->offset,
  60                                         len, retlen, buf);
  61         else
  62                 return part->master->read_ecc (part->master, from + part->offset,
  63                                         len, retlen, buf, NULL, &mtd->oobinfo);
  64 }
  65
  66 static int part_point (struct mtd_info *mtd, loff_t from, size_t len,
  67                         size_t *retlen, u_char **buf)
  68 {
  69         struct mtd_part *part = PART(mtd);
  70         if (from >= mtd->size)
  71                 len = 0;
  72         else if (from + len > mtd->size)
  73                 len = mtd->size - from;
  74         return part->master->point (part->master, from + part->offset,
  75                                     len, retlen, buf);
  76 }
  77 static void part_unpoint (struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
  78 {
  79         struct mtd_part *part = PART(mtd);
  80
  81         part->master->unpoint (part->master, addr, from + part->offset, len);
  82 }
  83
  84
  85 static int part_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
  86                         size_t *retlen, u_char *buf, u_char *eccbuf, struct nand_oobinfo *oobsel)
  87 {
  88         struct mtd_part *part = PART(mtd);
  89         if (oobsel == NULL)
  90                 oobsel = &mtd->oobinfo;
  91         if (from >= mtd->size)
  92                 len = 0;
  93         else if (from + len > mtd->size)
  94                 len = mtd->size - from;
  95         return part->master->read_ecc (part->master, from + part->offset,
  96                                         len, retlen, buf, eccbuf, oobsel);
  97 }
  98
  99 static int part_read_oob (struct mtd_info *mtd, loff_t from, size_t len,
 100                         size_t *retlen, u_char *buf)
 101 {
 102         struct mtd_part *part = PART(mtd);
 103         if (from >= mtd->size)
 104                 len = 0;
 105         else if (from + len > mtd->size)
 106                 len = mtd->size - from;
 107         return part->master->read_oob (part->master, from + part->offset,
 108                                         len, retlen, buf);
 109 }
 110
 111 static int part_read_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
 112                         size_t *retlen, u_char *buf)
 113 {
 114         struct mtd_part *part = PART(mtd);
 115         return part->master->read_user_prot_reg (part->master, from,
 116                                         len, retlen, buf);
 117 }
 118
 119 static int part_get_user_prot_info (struct mtd_info *mtd,
 120                                     struct otp_info *buf, size_t len)
 121 {
 122         struct mtd_part *part = PART(mtd);
 123         return part->master->get_user_prot_info (part->master, buf, len);
 124 }
 125
 126 static int part_read_fact_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
 127                         size_t *retlen, u_char *buf)
 128 {
 129         struct mtd_part *part = PART(mtd);
 130         return part->master->read_fact_prot_reg (part->master, from,
 131                                         len, retlen, buf);
 132 }
 133
 134 static int part_get_fact_prot_info (struct mtd_info *mtd,
 135                                     struct otp_info *buf, size_t len)
 136 {
 137         struct mtd_part *part = PART(mtd);
 138         return part->master->get_fact_prot_info (part->master, buf, len);
 139 }
 140
 141 static int part_write (struct mtd_info *mtd, loff_t to, size_t len,
 142                         size_t *retlen, const u_char *buf)
 143 {
 144         struct mtd_part *part = PART(mtd);
 145         if (!(mtd->flags & MTD_WRITEABLE))
 146                 return -EROFS;
 147         if (to >= mtd->size)
 148                 len = 0;
 149         else if (to + len > mtd->size)
 150                 len = mtd->size - to;
 151         if (part->master->write_ecc == NULL)
 152                 return part->master->write (part->master, to + part->offset,
 153                                         len, retlen, buf);
 154         else
 155                 return part->master->write_ecc (part->master, to + part->offset,
 156                                         len, retlen, buf, NULL, &mtd->oobinfo);
 157
 158 }
 159
 160 static int part_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
 161                         size_t *retlen, const u_char *buf,
 162                          u_char *eccbuf, struct nand_oobinfo *oobsel)
 163 {
 164         struct mtd_part *part = PART(mtd);
 165         if (!(mtd->flags & MTD_WRITEABLE))
 166                 return -EROFS;
 167         if (oobsel == NULL)
 168                 oobsel = &mtd->oobinfo;
 169         if (to >= mtd->size)
 170                 len = 0;
 171         else if (to + len > mtd->size)
 172                 len = mtd->size - to;
 173         return part->master->write_ecc (part->master, to + part->offset,
 174                                         len, retlen, buf, eccbuf, oobsel);
 175 }
 176
 177 static int part_write_oob (struct mtd_info *mtd, loff_t to, size_t len,
 178                         size_t *retlen, const u_char *buf)
 179 {
 180         struct mtd_part *part = PART(mtd);
 181         if (!(mtd->flags & MTD_WRITEABLE))
 182                 return -EROFS;
 183         if (to >= mtd->size)
 184                 len = 0;
 185         else if (to + len > mtd->size)
 186                 len = mtd->size - to;
 187         return part->master->write_oob (part->master, to + part->offset,
 188                                         len, retlen, buf);
 189 }
 190
 191 static int part_write_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len,
 192                         size_t *retlen, u_char *buf)
 193 {
 194         struct mtd_part *part = PART(mtd);
 195         return part->master->write_user_prot_reg (part->master, from,
 196                                         len, retlen, buf);
 197 }
 198
 199 static int part_lock_user_prot_reg (struct mtd_info *mtd, loff_t from, size_t len)
 200 {
 201         struct mtd_part *part = PART(mtd);
 202         return part->master->lock_user_prot_reg (part->master, from, len);
 203 }
 204
 205 static int part_writev (struct mtd_info *mtd,  const struct kvec *vecs,
 206                          unsigned long count, loff_t to, size_t *retlen)
 207 {
 208         struct mtd_part *part = PART(mtd);
 209         if (!(mtd->flags & MTD_WRITEABLE))
 210                 return -EROFS;
 211         if (part->master->writev_ecc == NULL)
 212                 return part->master->writev (part->master, vecs, count,
 213                                         to + part->offset, retlen);
 214         else
 215                 return part->master->writev_ecc (part->master, vecs, count,
 216                                         to + part->offset, retlen,
 217                                         NULL, &mtd->oobinfo);
 218 }
 219
 220 static int part_readv (struct mtd_info *mtd,  struct kvec *vecs,
 221                          unsigned long count, loff_t from, size_t *retlen)
 222 {
 223         struct mtd_part *part = PART(mtd);
 224         if (part->master->readv_ecc == NULL)
 225                 return part->master->readv (part->master, vecs, count,
 226                                         from + part->offset, retlen);
 227         else
 228                 return part->master->readv_ecc (part->master, vecs, count,
 229                                         from + part->offset, retlen,
 230                                         NULL, &mtd->oobinfo);
 231 }
 232
 233 static int part_writev_ecc (struct mtd_info *mtd,  const struct kvec *vecs,
 234                          unsigned long count, loff_t to, size_t *retlen,
 235                          u_char *eccbuf,  struct nand_oobinfo *oobsel)
 236 {
 237         struct mtd_part *part = PART(mtd);
 238         if (!(mtd->flags & MTD_WRITEABLE))
 239                 return -EROFS;
 240         if (oobsel == NULL)
 241                 oobsel = &mtd->oobinfo;
 242         return part->master->writev_ecc (part->master, vecs, count,
 243                                         to + part->offset, retlen,
 244                                         eccbuf, oobsel);
 245 }
 246
 247 static int part_readv_ecc (struct mtd_info *mtd,  struct kvec *vecs,
 248                          unsigned long count, loff_t from, size_t *retlen,
 249                          u_char *eccbuf,  struct nand_oobinfo *oobsel)
 250 {
 251         struct mtd_part *part = PART(mtd);
 252         if (oobsel == NULL)
 253                 oobsel = &mtd->oobinfo;
 254         return part->master->readv_ecc (part->master, vecs, count,
 255                                         from + part->offset, retlen,
 256                                         eccbuf, oobsel);
 257 }
 258
 259 static int part_erase (struct mtd_info *mtd, struct erase_info *instr)
 260 {
 261         struct mtd_part *part = PART(mtd);
 262         int ret;
 263         if (!(mtd->flags & MTD_WRITEABLE))
 264                 return -EROFS;
 265         if (instr->addr >= mtd->size)
 266                 return -EINVAL;
 267         instr->addr += part->offset;
 268         ret = part->master->erase(part->master, instr);
 269         return ret;
 270 }
 271
 272 void mtd_erase_callback(struct erase_info *instr)
 273 {
 274         if (instr->mtd->erase == part_erase) {
 275                 struct mtd_part *part = PART(instr->mtd);
 276
 277                 if (instr->fail_addr != 0xffffffff)
 278                         instr->fail_addr -= part->offset;
 279                 instr->addr -= part->offset;
 280         }
 281         if (instr->callback)
 282                 instr->callback(instr);
 283 }
 284 EXPORT_SYMBOL_GPL(mtd_erase_callback);
 285
 286 static int part_lock (struct mtd_info *mtd, loff_t ofs, size_t len)
 287 {
 288         struct mtd_part *part = PART(mtd);
 289         if ((len + ofs) > mtd->size)
 290                 return -EINVAL;
 291         return part->master->lock(part->master, ofs + part->offset, len);
 292 }
 293
 294 static int part_unlock (struct mtd_info *mtd, loff_t ofs, size_t len)
 295 {
 296         struct mtd_part *part = PART(mtd);
 297         if ((len + ofs) > mtd->size)
 298                 return -EINVAL;
 299         return part->master->unlock(part->master, ofs + part->offset, len);
 300 }
 301
 302 static void part_sync(struct mtd_info *mtd)
 303 {
 304         struct mtd_part *part = PART(mtd);
 305         part->master->sync(part->master);
 306 }
 307
 308 static int part_suspend(struct mtd_info *mtd)
 309 {
 310         struct mtd_part *part = PART(mtd);
 311         return part->master->suspend(part->master);
 312 }
 313
 314 static void part_resume(struct mtd_info *mtd)
 315 {
 316         struct mtd_part *part = PART(mtd);
 317         part->master->resume(part->master);
 318 }
 319
 320 static int part_block_isbad (struct mtd_info *mtd, loff_t ofs)
 321 {
 322         struct mtd_part *part = PART(mtd);
 323         if (ofs >= mtd->size)
 324                 return -EINVAL;
 325         ofs += part->offset;
 326         return part->master->block_isbad(part->master, ofs);
 327 }
 328
 329 static int part_block_markbad (struct mtd_info *mtd, loff_t ofs)
 330 {
 331         struct mtd_part *part = PART(mtd);
 332         if (!(mtd->flags & MTD_WRITEABLE))
 333                 return -EROFS;
 334         if (ofs >= mtd->size)
 335                 return -EINVAL;
 336         ofs += part->offset;
 337         return part->master->block_markbad(part->master, ofs);
 338 }
 339
 340 /*
 341  * This function unregisters and destroy all slave MTD objects which are
 342  * attached to the given master MTD object.
 343  */
 344
 345 int del_mtd_partitions(struct mtd_info *master)
 346 {
 347         struct list_head *node;
 348         struct mtd_part *slave;
 349
 350         for (node = mtd_partitions.next;
 351              node != &mtd_partitions;
 352              node = node->next) {
 353                 slave = list_entry(node, struct mtd_part, list);
 354                 if (slave->master == master) {
 355                         struct list_head *prev = node->prev;
 356                         __list_del(prev, node->next);
 357                         if(slave->registered)
 358                                 del_mtd_device(&slave->mtd);
 359                         kfree(slave);
 360                         node = prev;
 361                 }
 362         }
 363
 364         return 0;
 365 }
 366
 367 /*
 368  * This function, given a master MTD object and a partition table, creates
 369  * and registers slave MTD objects which are bound to the master according to
 370  * the partition definitions.
 371  * (Q: should we register the master MTD object as well?)
 372  */
 373
 374 int add_mtd_partitions(struct mtd_info *master,
 375                        const struct mtd_partition *parts,
 376                        int nbparts)
 377 {
 378         struct mtd_part *slave;
 379         u_int32_t cur_offset = 0;
 380         int i;
 381
 382         printk (KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n", nbparts, master->name);
 383
 384         for (i = 0; i < nbparts; i++) {
 385
 386                 /* allocate the partition structure */
 387                 slave = kmalloc (sizeof(*slave), GFP_KERNEL);
 388                 if (!slave) {
 389                         printk ("memory allocation error while creating partitions for \"%s\"\n",
 390                                 master->name);
 391                         del_mtd_partitions(master);
 392                         return -ENOMEM;
 393                 }
 394                 memset(slave, 0, sizeof(*slave));
 395                 list_add(&slave->list, &mtd_partitions);
 396
 397                 /* set up the MTD object for this partition */
 398                 slave->mtd.type = master->type;
 399                 slave->mtd.flags = master->flags & ~parts[i].mask_flags;
 400                 slave->mtd.size = parts[i].size;
 401                 slave->mtd.oobblock = master->oobblock;
 402                 slave->mtd.oobsize = master->oobsize;
 403                 slave->mtd.oobavail = master->oobavail;
 404                 slave->mtd.ecctype = master->ecctype;
 405                 slave->mtd.eccsize = master->eccsize;
 406
 407                 slave->mtd.name = parts[i].name;
 408                 slave->mtd.bank_size = master->bank_size;
 409                 slave->mtd.owner = master->owner;
 410
 411                 slave->mtd.read = part_read;
 412                 slave->mtd.write = part_write;
 413
 414                 if(master->point && master->unpoint){
 415                         slave->mtd.point = part_point;
 416                         slave->mtd.unpoint = part_unpoint;
 417                 }
 418
 419                 if (master->read_ecc)
 420                         slave->mtd.read_ecc = part_read_ecc;
 421                 if (master->write_ecc)
 422                         slave->mtd.write_ecc = part_write_ecc;
 423                 if (master->read_oob)
 424                         slave->mtd.read_oob = part_read_oob;
 425                 if (master->write_oob)
 426                         slave->mtd.write_oob = part_write_oob;
 427                 if(master->read_user_prot_reg)
 428                         slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
 429                 if(master->read_fact_prot_reg)
 430                         slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
 431                 if(master->write_user_prot_reg)
 432                         slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
 433                 if(master->lock_user_prot_reg)
 434                         slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
 435                 if(master->get_user_prot_info)
 436                         slave->mtd.get_user_prot_info = part_get_user_prot_info;
 437                 if(master->get_fact_prot_info)
 438                         slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
 439                 if (master->sync)
 440                         slave->mtd.sync = part_sync;
 441                 if (!i && master->suspend && master->resume) {
 442                                 slave->mtd.suspend = part_suspend;
 443                                 slave->mtd.resume = part_resume;
 444                 }
 445                 if (master->writev)
 446                         slave->mtd.writev = part_writev;
 447                 if (master->readv)
 448                         slave->mtd.readv = part_readv;
 449                 if (master->writev_ecc)
 450                         slave->mtd.writev_ecc = part_writev_ecc;
 451                 if (master->readv_ecc)
 452                         slave->mtd.readv_ecc = part_readv_ecc;
 453                 if (master->lock)
 454                         slave->mtd.lock = part_lock;
 455                 if (master->unlock)
 456                         slave->mtd.unlock = part_unlock;
 457                 if (master->block_isbad)
 458                         slave->mtd.block_isbad = part_block_isbad;
 459                 if (master->block_markbad)
 460                         slave->mtd.block_markbad = part_block_markbad;
 461                 slave->mtd.erase = part_erase;
 462                 slave->master = master;
 463                 slave->offset = parts[i].offset;
 464                 slave->index = i;
 465
 466                 if (slave->offset == MTDPART_OFS_APPEND)
 467                         slave->offset = cur_offset;
 468                 if (slave->offset == MTDPART_OFS_NXTBLK) {
 469                         slave->offset = cur_offset;
 470                         if ((cur_offset % master->erasesize) != 0) {
 471                                 /* Round up to next erasesize */
 472                                 slave->offset = ((cur_offset / master->erasesize) + 1) * master->erasesize;
 473                                 printk(KERN_NOTICE "Moving partition %d: "
 474                                        "0x%08x -> 0x%08x\n", i,
 475                                        cur_offset, slave->offset);
 476                         }
 477                 }
 478                 if (slave->mtd.size == MTDPART_SIZ_FULL)
 479                         slave->mtd.size = master->size - slave->offset;
 480                 cur_offset = slave->offset + slave->mtd.size;
 481
 482                 printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
 483                         slave->offset + slave->mtd.size, slave->mtd.name);
 484
 485                 /* let's do some sanity checks */
 486                 if (slave->offset >= master->size) {
 487                                 /* let's register it anyway to preserve ordering */
 488                         slave->offset = 0;
 489                         slave->mtd.size = 0;
 490                         printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
 491                                 parts[i].name);
 492                 }
 493                 if (slave->offset + slave->mtd.size > master->size) {
 494                         slave->mtd.size = master->size - slave->offset;
 495                         printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
 496                                 parts[i].name, master->name, slave->mtd.size);
 497                 }
 498                 if (master->numeraseregions>1) {
 499                         /* Deal with variable erase size stuff */
 500                         int i;
 501                         struct mtd_erase_region_info *regions = master->eraseregions;
 502
 503                         /* Find the first erase regions which is part of this partition. */
 504                         for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
 505                                 ;
 506
 507                         for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
 508                                 if (slave->mtd.erasesize < regions[i].erasesize) {
 509                                         slave->mtd.erasesize = regions[i].erasesize;
 510                                 }
 511                         }
 512                 } else {
 513                         /* Single erase size */
 514                         slave->mtd.erasesize = master->erasesize;
 515                 }
 516
 517                 if ((slave->mtd.flags & MTD_WRITEABLE) &&
 518                     (slave->offset % slave->mtd.erasesize)) {
 519                         /* Doesn't start on a boundary of major erase size */
 520                         /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
 521                         slave->mtd.flags &= ~MTD_WRITEABLE;
 522                         printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
 523                                 parts[i].name);
 524                 }
 525                 if ((slave->mtd.flags & MTD_WRITEABLE) &&
 526                     (slave->mtd.size % slave->mtd.erasesize)) {
 527                         slave->mtd.flags &= ~MTD_WRITEABLE;
 528                         printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
 529                                 parts[i].name);
 530                 }
 531
 532                 /* copy oobinfo from master */
 533                 memcpy(&slave->mtd.oobinfo, &master->oobinfo, sizeof(slave->mtd.oobinfo));
 534
 535                 if(parts[i].mtdp)
 536                 {       /* store the object pointer (caller may or may not register it */
 537                         *parts[i].mtdp = &slave->mtd;
 538                         slave->registered = 0;
 539                 }
 540                 else
 541                 {
 542                         /* register our partition */
 543                         add_mtd_device(&slave->mtd);
 544                         slave->registered = 1;
 545                 }
 546         }
 547
 548         return 0;
 549 }
 550
 551 EXPORT_SYMBOL(add_mtd_partitions);
 552 EXPORT_SYMBOL(del_mtd_partitions);
 553
 554 static DEFINE_SPINLOCK(part_parser_lock);
 555 static LIST_HEAD(part_parsers);
 556
 557 static struct mtd_part_parser *get_partition_parser(const char *name)
 558 {
 559         struct list_head *this;
 560         void *ret = NULL;
 561         spin_lock(&part_parser_lock);
 562
 563         list_for_each(this, &part_parsers) {
 564                 struct mtd_part_parser *p = list_entry(this, struct mtd_part_parser, list);
 565
 566                 if (!strcmp(p->name, name) && try_module_get(p->owner)) {
 567                         ret = p;
 568                         break;
 569                 }
 570         }
 571         spin_unlock(&part_parser_lock);
 572
 573         return ret;
 574 }
 575
 576 int register_mtd_parser(struct mtd_part_parser *p)
 577 {
 578         spin_lock(&part_parser_lock);
 579         list_add(&p->list, &part_parsers);
 580         spin_unlock(&part_parser_lock);
 581
 582         return 0;
 583 }
 584
 585 int deregister_mtd_parser(struct mtd_part_parser *p)
 586 {
 587         spin_lock(&part_parser_lock);
 588         list_del(&p->list);
 589         spin_unlock(&part_parser_lock);
 590         return 0;
 591 }
 592
 593 int parse_mtd_partitions(struct mtd_info *master, const char **types,
 594                          struct mtd_partition **pparts, unsigned long origin)
 595 {
 596         struct mtd_part_parser *parser;
 597         int ret = 0;
 598
 599         for ( ; ret <= 0 && *types; types++) {
 600                 parser = get_partition_parser(*types);
 601 #ifdef CONFIG_KMOD
 602                 if (!parser && !request_module("%s", *types))
 603                                 parser = get_partition_parser(*types);
 604 #endif
 605                 if (!parser) {
 606                         printk(KERN_NOTICE "%s partition parsing not available\n",
 607                                *types);
 608                         continue;
 609                 }
 610                 ret = (*parser->parse_fn)(master, pparts, origin);
 611                 if (ret > 0) {
 612                         printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
 613                                ret, parser->name, master->name);
 614                 }
 615                 put_partition_parser(parser);
 616         }
 617         return ret;
 618 }
 619
 620 EXPORT_SYMBOL_GPL(parse_mtd_partitions);
 621 EXPORT_SYMBOL_GPL(register_mtd_parser);
 622 EXPORT_SYMBOL_GPL(deregister_mtd_parser);
 623
 624 MODULE_LICENSE("GPL");
 625 MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
 626 MODULE_DESCRIPTION("Generic support for partitioning of MTD devices");
 627