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 1.53 2005/02/08 17:11:13 nico 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.ecctype = master->ecctype;
 404                 slave->mtd.eccsize = master->eccsize;
 405
 406                 slave->mtd.name = parts[i].name;
 407                 slave->mtd.bank_size = master->bank_size;
 408                 slave->mtd.owner = master->owner;
 409
 410                 slave->mtd.read = part_read;
 411                 slave->mtd.write = part_write;
 412
 413                 if(master->point && master->unpoint){
 414                         slave->mtd.point = part_point;
 415                         slave->mtd.unpoint = part_unpoint;
 416                 }
 417
 418                 if (master->read_ecc)
 419                         slave->mtd.read_ecc = part_read_ecc;
 420                 if (master->write_ecc)
 421                         slave->mtd.write_ecc = part_write_ecc;
 422                 if (master->read_oob)
 423                         slave->mtd.read_oob = part_read_oob;
 424                 if (master->write_oob)
 425                         slave->mtd.write_oob = part_write_oob;
 426                 if(master->read_user_prot_reg)
 427                         slave->mtd.read_user_prot_reg = part_read_user_prot_reg;
 428                 if(master->read_fact_prot_reg)
 429                         slave->mtd.read_fact_prot_reg = part_read_fact_prot_reg;
 430                 if(master->write_user_prot_reg)
 431                         slave->mtd.write_user_prot_reg = part_write_user_prot_reg;
 432                 if(master->lock_user_prot_reg)
 433                         slave->mtd.lock_user_prot_reg = part_lock_user_prot_reg;
 434                 if(master->get_user_prot_info)
 435                         slave->mtd.get_user_prot_info = part_get_user_prot_info;
 436                 if(master->get_fact_prot_info)
 437                         slave->mtd.get_fact_prot_info = part_get_fact_prot_info;
 438                 if (master->sync)
 439                         slave->mtd.sync = part_sync;
 440                 if (!i && master->suspend && master->resume) {
 441                                 slave->mtd.suspend = part_suspend;
 442                                 slave->mtd.resume = part_resume;
 443                 }
 444                 if (master->writev)
 445                         slave->mtd.writev = part_writev;
 446                 if (master->readv)
 447                         slave->mtd.readv = part_readv;
 448                 if (master->writev_ecc)
 449                         slave->mtd.writev_ecc = part_writev_ecc;
 450                 if (master->readv_ecc)
 451                         slave->mtd.readv_ecc = part_readv_ecc;
 452                 if (master->lock)
 453                         slave->mtd.lock = part_lock;
 454                 if (master->unlock)
 455                         slave->mtd.unlock = part_unlock;
 456                 if (master->block_isbad)
 457                         slave->mtd.block_isbad = part_block_isbad;
 458                 if (master->block_markbad)
 459                         slave->mtd.block_markbad = part_block_markbad;
 460                 slave->mtd.erase = part_erase;
 461                 slave->master = master;
 462                 slave->offset = parts[i].offset;
 463                 slave->index = i;
 464
 465                 if (slave->offset == MTDPART_OFS_APPEND)
 466                         slave->offset = cur_offset;
 467                 if (slave->offset == MTDPART_OFS_NXTBLK) {
 468                         u_int32_t emask = master->erasesize-1;
 469                         slave->offset = (cur_offset + emask) & ~emask;
 470                         if (slave->offset != cur_offset) {
 471                                 printk(KERN_NOTICE "Moving partition %d: "
 472                                        "0x%08x -> 0x%08x\n", i,
 473                                        cur_offset, slave->offset);
 474                         }
 475                 }
 476                 if (slave->mtd.size == MTDPART_SIZ_FULL)
 477                         slave->mtd.size = master->size - slave->offset;
 478                 cur_offset = slave->offset + slave->mtd.size;
 479
 480                 printk (KERN_NOTICE "0x%08x-0x%08x : \"%s\"\n", slave->offset,
 481                         slave->offset + slave->mtd.size, slave->mtd.name);
 482
 483                 /* let's do some sanity checks */
 484                 if (slave->offset >= master->size) {
 485                                 /* let's register it anyway to preserve ordering */
 486                         slave->offset = 0;
 487                         slave->mtd.size = 0;
 488                         printk ("mtd: partition \"%s\" is out of reach -- disabled\n",
 489                                 parts[i].name);
 490                 }
 491                 if (slave->offset + slave->mtd.size > master->size) {
 492                         slave->mtd.size = master->size - slave->offset;
 493                         printk ("mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#x\n",
 494                                 parts[i].name, master->name, slave->mtd.size);
 495                 }
 496                 if (master->numeraseregions>1) {
 497                         /* Deal with variable erase size stuff */
 498                         int i;
 499                         struct mtd_erase_region_info *regions = master->eraseregions;
 500
 501                         /* Find the first erase regions which is part of this partition. */
 502                         for (i=0; i < master->numeraseregions && slave->offset >= regions[i].offset; i++)
 503                                 ;
 504
 505                         for (i--; i < master->numeraseregions && slave->offset + slave->mtd.size > regions[i].offset; i++) {
 506                                 if (slave->mtd.erasesize < regions[i].erasesize) {
 507                                         slave->mtd.erasesize = regions[i].erasesize;
 508                                 }
 509                         }
 510                 } else {
 511                         /* Single erase size */
 512                         slave->mtd.erasesize = master->erasesize;
 513                 }
 514
 515                 if ((slave->mtd.flags & MTD_WRITEABLE) &&
 516                     (slave->offset % slave->mtd.erasesize)) {
 517                         /* Doesn't start on a boundary of major erase size */
 518                         /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
 519                         slave->mtd.flags &= ~MTD_WRITEABLE;
 520                         printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
 521                                 parts[i].name);
 522                 }
 523                 if ((slave->mtd.flags & MTD_WRITEABLE) &&
 524                     (slave->mtd.size % slave->mtd.erasesize)) {
 525                         slave->mtd.flags &= ~MTD_WRITEABLE;
 526                         printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
 527                                 parts[i].name);
 528                 }
 529
 530                 /* copy oobinfo from master */
 531                 memcpy(&slave->mtd.oobinfo, &master->oobinfo, sizeof(slave->mtd.oobinfo));
 532
 533                 if(parts[i].mtdp)
 534                 {       /* store the object pointer (caller may or may not register it */
 535                         *parts[i].mtdp = &slave->mtd;
 536                         slave->registered = 0;
 537                 }
 538                 else
 539                 {
 540                         /* register our partition */
 541                         add_mtd_device(&slave->mtd);
 542                         slave->registered = 1;
 543                 }
 544         }
 545
 546         return 0;
 547 }
 548
 549 EXPORT_SYMBOL(add_mtd_partitions);
 550 EXPORT_SYMBOL(del_mtd_partitions);
 551
 552 static DEFINE_SPINLOCK(part_parser_lock);
 553 static LIST_HEAD(part_parsers);
 554
 555 static struct mtd_part_parser *get_partition_parser(const char *name)
 556 {
 557         struct list_head *this;
 558         void *ret = NULL;
 559         spin_lock(&part_parser_lock);
 560
 561         list_for_each(this, &part_parsers) {
 562                 struct mtd_part_parser *p = list_entry(this, struct mtd_part_parser, list);
 563
 564                 if (!strcmp(p->name, name) && try_module_get(p->owner)) {
 565                         ret = p;
 566                         break;
 567                 }
 568         }
 569         spin_unlock(&part_parser_lock);
 570
 571         return ret;
 572 }
 573
 574 int register_mtd_parser(struct mtd_part_parser *p)
 575 {
 576         spin_lock(&part_parser_lock);
 577         list_add(&p->list, &part_parsers);
 578         spin_unlock(&part_parser_lock);
 579
 580         return 0;
 581 }
 582
 583 int deregister_mtd_parser(struct mtd_part_parser *p)
 584 {
 585         spin_lock(&part_parser_lock);
 586         list_del(&p->list);
 587         spin_unlock(&part_parser_lock);
 588         return 0;
 589 }
 590
 591 int parse_mtd_partitions(struct mtd_info *master, const char **types,
 592                          struct mtd_partition **pparts, unsigned long origin)
 593 {
 594         struct mtd_part_parser *parser;
 595         int ret = 0;
 596
 597         for ( ; ret <= 0 && *types; types++) {
 598                 parser = get_partition_parser(*types);
 599 #ifdef CONFIG_KMOD
 600                 if (!parser && !request_module("%s", *types))
 601                                 parser = get_partition_parser(*types);
 602 #endif
 603                 if (!parser) {
 604                         printk(KERN_NOTICE "%s partition parsing not available\n",
 605                                *types);
 606                         continue;
 607                 }
 608                 ret = (*parser->parse_fn)(master, pparts, origin);
 609                 if (ret > 0) {
 610                         printk(KERN_NOTICE "%d %s partitions found on MTD device %s\n",
 611                                ret, parser->name, master->name);
 612                 }
 613                 put_partition_parser(parser);
 614         }
 615         return ret;
 616 }
 617
 618 EXPORT_SYMBOL_GPL(parse_mtd_partitions);
 619 EXPORT_SYMBOL_GPL(register_mtd_parser);
 620 EXPORT_SYMBOL_GPL(deregister_mtd_parser);
 621
 622 MODULE_LICENSE("GPL");
 623 MODULE_AUTHOR("Nicolas Pitre <nico@cam.org>");
 624 MODULE_DESCRIPTION("Generic support for partitioning of MTD devices");
 625