xref: /openbmc/u-boot/cmd/mtdparts.c (revision 626f048b)
1 /*
2  * (C) Copyright 2002
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * (C) Copyright 2002
6  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
7  *
8  * (C) Copyright 2003
9  * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
10  *
11  * (C) Copyright 2005
12  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
13  *
14  *   Added support for reading flash partition table from environment.
15  *   Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
16  *   kernel tree.
17  *
18  * (C) Copyright 2008
19  * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
20  *
21  *   $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
22  *   Copyright 2002 SYSGO Real-Time Solutions GmbH
23  *
24  * SPDX-License-Identifier:	GPL-2.0+
25  */
26 
27 /*
28  * Three environment variables are used by the parsing routines:
29  *
30  * 'partition' - keeps current partition identifier
31  *
32  * partition  := <part-id>
33  * <part-id>  := <dev-id>,part_num
34  *
35  *
36  * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
37  *
38  * mtdids=<idmap>[,<idmap>,...]
39  *
40  * <idmap>    := <dev-id>=<mtd-id>
41  * <dev-id>   := 'nand'|'nor'|'onenand'<dev-num>
42  * <dev-num>  := mtd device number, 0...
43  * <mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)
44  *
45  *
46  * 'mtdparts' - partition list
47  *
48  * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
49  *
50  * <mtd-def>  := <mtd-id>:<part-def>[,<part-def>...]
51  * <mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)
52  * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
53  * <size>     := standard linux memsize OR '-' to denote all remaining space
54  * <offset>   := partition start offset within the device
55  * <name>     := '(' NAME ')'
56  * <ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)
57  *
58  * Notes:
59  * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
60  * - if the above variables are not set defaults for a given target are used
61  *
62  * Examples:
63  *
64  * 1 NOR Flash, with 1 single writable partition:
65  * mtdids=nor0=edb7312-nor
66  * mtdparts=mtdparts=edb7312-nor:-
67  *
68  * 1 NOR Flash with 2 partitions, 1 NAND with one
69  * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
70  * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
71  *
72  */
73 
74 #include <common.h>
75 #include <command.h>
76 #include <malloc.h>
77 #include <jffs2/load_kernel.h>
78 #include <linux/list.h>
79 #include <linux/ctype.h>
80 #include <linux/err.h>
81 #include <linux/mtd/mtd.h>
82 
83 #if defined(CONFIG_CMD_NAND)
84 #include <linux/mtd/nand.h>
85 #include <nand.h>
86 #endif
87 
88 #if defined(CONFIG_CMD_ONENAND)
89 #include <linux/mtd/onenand.h>
90 #include <onenand_uboot.h>
91 #endif
92 
93 DECLARE_GLOBAL_DATA_PTR;
94 
95 /* special size referring to all the remaining space in a partition */
96 #define SIZE_REMAINING		(~0llu)
97 
98 /* special offset value, it is used when not provided by user
99  *
100  * this value is used temporarily during parsing, later such offests
101  * are recalculated */
102 #define OFFSET_NOT_SPECIFIED	(~0llu)
103 
104 /* minimum partition size */
105 #define MIN_PART_SIZE		4096
106 
107 /* this flag needs to be set in part_info struct mask_flags
108  * field for read-only partitions */
109 #define MTD_WRITEABLE_CMD		1
110 
111 /* default values for mtdids and mtdparts variables */
112 #if defined(MTDIDS_DEFAULT)
113 static const char *const mtdids_default = MTDIDS_DEFAULT;
114 #else
115 static const char *const mtdids_default = NULL;
116 #endif
117 
118 #if defined(MTDPARTS_DEFAULT)
119 static const char *const mtdparts_default = MTDPARTS_DEFAULT;
120 #else
121 static const char *const mtdparts_default = NULL;
122 #endif
123 
124 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
125 #define MTDIDS_MAXLEN		128
126 #define MTDPARTS_MAXLEN		512
127 #define PARTITION_MAXLEN	16
128 static char last_ids[MTDIDS_MAXLEN];
129 static char last_parts[MTDPARTS_MAXLEN];
130 static char last_partition[PARTITION_MAXLEN];
131 
132 /* low level jffs2 cache cleaning routine */
133 extern void jffs2_free_cache(struct part_info *part);
134 
135 /* mtdids mapping list, filled by parse_ids() */
136 static struct list_head mtdids;
137 
138 /* device/partition list, parse_cmdline() parses into here */
139 static struct list_head devices;
140 
141 /* current active device and partition number */
142 struct mtd_device *current_mtd_dev = NULL;
143 u8 current_mtd_partnum = 0;
144 
145 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
146 
147 /* command line only routines */
148 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len);
149 static int device_del(struct mtd_device *dev);
150 
151 /**
152  * Parses a string into a number.  The number stored at ptr is
153  * potentially suffixed with K (for kilobytes, or 1024 bytes),
154  * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
155  * 1073741824).  If the number is suffixed with K, M, or G, then
156  * the return value is the number multiplied by one kilobyte, one
157  * megabyte, or one gigabyte, respectively.
158  *
159  * @param ptr where parse begins
160  * @param retptr output pointer to next char after parse completes (output)
161  * @return resulting unsigned int
162  */
163 static u64 memsize_parse (const char *const ptr, const char **retptr)
164 {
165 	u64 ret = simple_strtoull(ptr, (char **)retptr, 0);
166 
167 	switch (**retptr) {
168 		case 'G':
169 		case 'g':
170 			ret <<= 10;
171 		case 'M':
172 		case 'm':
173 			ret <<= 10;
174 		case 'K':
175 		case 'k':
176 			ret <<= 10;
177 			(*retptr)++;
178 		default:
179 			break;
180 	}
181 
182 	return ret;
183 }
184 
185 /**
186  * Format string describing supplied size. This routine does the opposite job
187  * to memsize_parse(). Size in bytes is converted to string and if possible
188  * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
189  *
190  * Note, that this routine does not check for buffer overflow, it's the caller
191  * who must assure enough space.
192  *
193  * @param buf output buffer
194  * @param size size to be converted to string
195  */
196 static void memsize_format(char *buf, u64 size)
197 {
198 #define SIZE_GB ((u32)1024*1024*1024)
199 #define SIZE_MB ((u32)1024*1024)
200 #define SIZE_KB ((u32)1024)
201 
202 	if ((size % SIZE_GB) == 0)
203 		sprintf(buf, "%llug", size/SIZE_GB);
204 	else if ((size % SIZE_MB) == 0)
205 		sprintf(buf, "%llum", size/SIZE_MB);
206 	else if (size % SIZE_KB == 0)
207 		sprintf(buf, "%lluk", size/SIZE_KB);
208 	else
209 		sprintf(buf, "%llu", size);
210 }
211 
212 /**
213  * This routine does global indexing of all partitions. Resulting index for
214  * current partition is saved in 'mtddevnum'. Current partition name in
215  * 'mtddevname'.
216  */
217 static void index_partitions(void)
218 {
219 	u16 mtddevnum;
220 	struct part_info *part;
221 	struct list_head *dentry;
222 	struct mtd_device *dev;
223 
224 	debug("--- index partitions ---\n");
225 
226 	if (current_mtd_dev) {
227 		mtddevnum = 0;
228 		list_for_each(dentry, &devices) {
229 			dev = list_entry(dentry, struct mtd_device, link);
230 			if (dev == current_mtd_dev) {
231 				mtddevnum += current_mtd_partnum;
232 				setenv_ulong("mtddevnum", mtddevnum);
233 				break;
234 			}
235 			mtddevnum += dev->num_parts;
236 		}
237 
238 		part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
239 		setenv("mtddevname", part->name);
240 
241 		debug("=> mtddevnum %d,\n=> mtddevname %s\n", mtddevnum, part->name);
242 	} else {
243 		setenv("mtddevnum", NULL);
244 		setenv("mtddevname", NULL);
245 
246 		debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
247 	}
248 }
249 
250 /**
251  * Save current device and partition in environment variable 'partition'.
252  */
253 static void current_save(void)
254 {
255 	char buf[16];
256 
257 	debug("--- current_save ---\n");
258 
259 	if (current_mtd_dev) {
260 		sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type),
261 					current_mtd_dev->id->num, current_mtd_partnum);
262 
263 		setenv("partition", buf);
264 		strncpy(last_partition, buf, 16);
265 
266 		debug("=> partition %s\n", buf);
267 	} else {
268 		setenv("partition", NULL);
269 		last_partition[0] = '\0';
270 
271 		debug("=> partition NULL\n");
272 	}
273 	index_partitions();
274 }
275 
276 
277 /**
278  * Produce a mtd_info given a type and num.
279  *
280  * @param type mtd type
281  * @param num mtd number
282  * @param mtd a pointer to an mtd_info instance (output)
283  * @return 0 if device is valid, 1 otherwise
284  */
285 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
286 {
287 	char mtd_dev[16];
288 
289 	sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
290 	*mtd = get_mtd_device_nm(mtd_dev);
291 	if (IS_ERR(*mtd)) {
292 		printf("Device %s not found!\n", mtd_dev);
293 		return 1;
294 	}
295 	put_mtd_device(*mtd);
296 
297 	return 0;
298 }
299 
300 /**
301  * Performs sanity check for supplied flash partition.
302  * Table of existing MTD flash devices is searched and partition device
303  * is located. Alignment with the granularity of nand erasesize is verified.
304  *
305  * @param id of the parent device
306  * @param part partition to validate
307  * @return 0 if partition is valid, 1 otherwise
308  */
309 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
310 {
311 	struct mtd_info *mtd = NULL;
312 	int i, j;
313 	ulong start;
314 	u64 offset, size;
315 
316 	if (get_mtd_info(id->type, id->num, &mtd))
317 		return 1;
318 
319 	part->sector_size = mtd->erasesize;
320 
321 	if (!mtd->numeraseregions) {
322 		/*
323 		 * Only one eraseregion (NAND, OneNAND or uniform NOR),
324 		 * checking for alignment is easy here
325 		 */
326 		offset = part->offset;
327 		if (do_div(offset, mtd->erasesize)) {
328 			printf("%s%d: partition (%s) start offset"
329 			       "alignment incorrect\n",
330 			       MTD_DEV_TYPE(id->type), id->num, part->name);
331 			return 1;
332 		}
333 
334 		size = part->size;
335 		if (do_div(size, mtd->erasesize)) {
336 			printf("%s%d: partition (%s) size alignment incorrect\n",
337 			       MTD_DEV_TYPE(id->type), id->num, part->name);
338 			return 1;
339 		}
340 	} else {
341 		/*
342 		 * Multiple eraseregions (non-uniform NOR),
343 		 * checking for alignment is more complex here
344 		 */
345 
346 		/* Check start alignment */
347 		for (i = 0; i < mtd->numeraseregions; i++) {
348 			start = mtd->eraseregions[i].offset;
349 			for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
350 				if (part->offset == start)
351 					goto start_ok;
352 				start += mtd->eraseregions[i].erasesize;
353 			}
354 		}
355 
356 		printf("%s%d: partition (%s) start offset alignment incorrect\n",
357 		       MTD_DEV_TYPE(id->type), id->num, part->name);
358 		return 1;
359 
360 	start_ok:
361 
362 		/* Check end/size alignment */
363 		for (i = 0; i < mtd->numeraseregions; i++) {
364 			start = mtd->eraseregions[i].offset;
365 			for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
366 				if ((part->offset + part->size) == start)
367 					goto end_ok;
368 				start += mtd->eraseregions[i].erasesize;
369 			}
370 		}
371 		/* Check last sector alignment */
372 		if ((part->offset + part->size) == start)
373 			goto end_ok;
374 
375 		printf("%s%d: partition (%s) size alignment incorrect\n",
376 		       MTD_DEV_TYPE(id->type), id->num, part->name);
377 		return 1;
378 
379 	end_ok:
380 		return 0;
381 	}
382 
383 	return 0;
384 }
385 
386 
387 /**
388  * Performs sanity check for supplied partition. Offset and size are
389  * verified to be within valid range. Partition type is checked and
390  * part_validate_eraseblock() is called with the argument of part.
391  *
392  * @param id of the parent device
393  * @param part partition to validate
394  * @return 0 if partition is valid, 1 otherwise
395  */
396 static int part_validate(struct mtdids *id, struct part_info *part)
397 {
398 	if (part->size == SIZE_REMAINING)
399 		part->size = id->size - part->offset;
400 
401 	if (part->offset > id->size) {
402 		printf("%s: offset %08llx beyond flash size %08llx\n",
403 				id->mtd_id, part->offset, id->size);
404 		return 1;
405 	}
406 
407 	if ((part->offset + part->size) <= part->offset) {
408 		printf("%s%d: partition (%s) size too big\n",
409 				MTD_DEV_TYPE(id->type), id->num, part->name);
410 		return 1;
411 	}
412 
413 	if (part->offset + part->size > id->size) {
414 		printf("%s: partitioning exceeds flash size\n", id->mtd_id);
415 		return 1;
416 	}
417 
418 	/*
419 	 * Now we need to check if the partition starts and ends on
420 	 * sector (eraseblock) regions
421 	 */
422 	return part_validate_eraseblock(id, part);
423 }
424 
425 /**
426  * Delete selected partition from the partition list of the specified device.
427  *
428  * @param dev device to delete partition from
429  * @param part partition to delete
430  * @return 0 on success, 1 otherwise
431  */
432 static int part_del(struct mtd_device *dev, struct part_info *part)
433 {
434 	u8 current_save_needed = 0;
435 
436 	/* if there is only one partition, remove whole device */
437 	if (dev->num_parts == 1)
438 		return device_del(dev);
439 
440 	/* otherwise just delete this partition */
441 
442 	if (dev == current_mtd_dev) {
443 		/* we are modyfing partitions for the current device,
444 		 * update current */
445 		struct part_info *curr_pi;
446 		curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
447 
448 		if (curr_pi) {
449 			if (curr_pi == part) {
450 				printf("current partition deleted, resetting current to 0\n");
451 				current_mtd_partnum = 0;
452 			} else if (part->offset <= curr_pi->offset) {
453 				current_mtd_partnum--;
454 			}
455 			current_save_needed = 1;
456 		}
457 	}
458 
459 	list_del(&part->link);
460 	free(part);
461 	dev->num_parts--;
462 
463 	if (current_save_needed > 0)
464 		current_save();
465 	else
466 		index_partitions();
467 
468 	return 0;
469 }
470 
471 /**
472  * Delete all partitions from parts head list, free memory.
473  *
474  * @param head list of partitions to delete
475  */
476 static void part_delall(struct list_head *head)
477 {
478 	struct list_head *entry, *n;
479 	struct part_info *part_tmp;
480 
481 	/* clean tmp_list and free allocated memory */
482 	list_for_each_safe(entry, n, head) {
483 		part_tmp = list_entry(entry, struct part_info, link);
484 
485 		list_del(entry);
486 		free(part_tmp);
487 	}
488 }
489 
490 /**
491  * Add new partition to the supplied partition list. Make sure partitions are
492  * sorted by offset in ascending order.
493  *
494  * @param head list this partition is to be added to
495  * @param new partition to be added
496  */
497 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
498 {
499 	struct list_head *entry;
500 	struct part_info *new_pi, *curr_pi;
501 
502 	/* link partition to parrent dev */
503 	part->dev = dev;
504 
505 	if (list_empty(&dev->parts)) {
506 		debug("part_sort_add: list empty\n");
507 		list_add(&part->link, &dev->parts);
508 		dev->num_parts++;
509 		index_partitions();
510 		return 0;
511 	}
512 
513 	new_pi = list_entry(&part->link, struct part_info, link);
514 
515 	/* get current partition info if we are updating current device */
516 	curr_pi = NULL;
517 	if (dev == current_mtd_dev)
518 		curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
519 
520 	list_for_each(entry, &dev->parts) {
521 		struct part_info *pi;
522 
523 		pi = list_entry(entry, struct part_info, link);
524 
525 		/* be compliant with kernel cmdline, allow only one partition at offset zero */
526 		if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
527 			printf("cannot add second partition at offset 0\n");
528 			return 1;
529 		}
530 
531 		if (new_pi->offset <= pi->offset) {
532 			list_add_tail(&part->link, entry);
533 			dev->num_parts++;
534 
535 			if (curr_pi && (pi->offset <= curr_pi->offset)) {
536 				/* we are modyfing partitions for the current
537 				 * device, update current */
538 				current_mtd_partnum++;
539 				current_save();
540 			} else {
541 				index_partitions();
542 			}
543 			return 0;
544 		}
545 	}
546 
547 	list_add_tail(&part->link, &dev->parts);
548 	dev->num_parts++;
549 	index_partitions();
550 	return 0;
551 }
552 
553 /**
554  * Add provided partition to the partition list of a given device.
555  *
556  * @param dev device to which partition is added
557  * @param part partition to be added
558  * @return 0 on success, 1 otherwise
559  */
560 static int part_add(struct mtd_device *dev, struct part_info *part)
561 {
562 	/* verify alignment and size */
563 	if (part_validate(dev->id, part) != 0)
564 		return 1;
565 
566 	/* partition is ok, add it to the list */
567 	if (part_sort_add(dev, part) != 0)
568 		return 1;
569 
570 	return 0;
571 }
572 
573 /**
574  * Parse one partition definition, allocate memory and return pointer to this
575  * location in retpart.
576  *
577  * @param partdef pointer to the partition definition string i.e. <part-def>
578  * @param ret output pointer to next char after parse completes (output)
579  * @param retpart pointer to the allocated partition (output)
580  * @return 0 on success, 1 otherwise
581  */
582 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
583 {
584 	struct part_info *part;
585 	u64 size;
586 	u64 offset;
587 	const char *name;
588 	int name_len;
589 	unsigned int mask_flags;
590 	const char *p;
591 
592 	p = partdef;
593 	*retpart = NULL;
594 	*ret = NULL;
595 
596 	/* fetch the partition size */
597 	if (*p == '-') {
598 		/* assign all remaining space to this partition */
599 		debug("'-': remaining size assigned\n");
600 		size = SIZE_REMAINING;
601 		p++;
602 	} else {
603 		size = memsize_parse(p, &p);
604 		if (size < MIN_PART_SIZE) {
605 			printf("partition size too small (%llx)\n", size);
606 			return 1;
607 		}
608 	}
609 
610 	/* check for offset */
611 	offset = OFFSET_NOT_SPECIFIED;
612 	if (*p == '@') {
613 		p++;
614 		offset = memsize_parse(p, &p);
615 	}
616 
617 	/* now look for the name */
618 	if (*p == '(') {
619 		name = ++p;
620 		if ((p = strchr(name, ')')) == NULL) {
621 			printf("no closing ) found in partition name\n");
622 			return 1;
623 		}
624 		name_len = p - name + 1;
625 		if ((name_len - 1) == 0) {
626 			printf("empty partition name\n");
627 			return 1;
628 		}
629 		p++;
630 	} else {
631 		/* 0x00000000@0x00000000 */
632 		name_len = 22;
633 		name = NULL;
634 	}
635 
636 	/* test for options */
637 	mask_flags = 0;
638 	if (strncmp(p, "ro", 2) == 0) {
639 		mask_flags |= MTD_WRITEABLE_CMD;
640 		p += 2;
641 	}
642 
643 	/* check for next partition definition */
644 	if (*p == ',') {
645 		if (size == SIZE_REMAINING) {
646 			*ret = NULL;
647 			printf("no partitions allowed after a fill-up partition\n");
648 			return 1;
649 		}
650 		*ret = ++p;
651 	} else if ((*p == ';') || (*p == '\0')) {
652 		*ret = p;
653 	} else {
654 		printf("unexpected character '%c' at the end of partition\n", *p);
655 		*ret = NULL;
656 		return 1;
657 	}
658 
659 	/*  allocate memory */
660 	part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
661 	if (!part) {
662 		printf("out of memory\n");
663 		return 1;
664 	}
665 	memset(part, 0, sizeof(struct part_info) + name_len);
666 	part->size = size;
667 	part->offset = offset;
668 	part->mask_flags = mask_flags;
669 	part->name = (char *)(part + 1);
670 
671 	if (name) {
672 		/* copy user provided name */
673 		strncpy(part->name, name, name_len - 1);
674 		part->auto_name = 0;
675 	} else {
676 		/* auto generated name in form of size@offset */
677 		sprintf(part->name, "0x%08llx@0x%08llx", size, offset);
678 		part->auto_name = 1;
679 	}
680 
681 	part->name[name_len - 1] = '\0';
682 	INIT_LIST_HEAD(&part->link);
683 
684 	debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx mask flags %d\n",
685 			part->name, part->size,
686 			part->offset, part->mask_flags);
687 
688 	*retpart = part;
689 	return 0;
690 }
691 
692 /**
693  * Check device number to be within valid range for given device type.
694  *
695  * @param type mtd type
696  * @param num mtd number
697  * @param size a pointer to the size of the mtd device (output)
698  * @return 0 if device is valid, 1 otherwise
699  */
700 static int mtd_device_validate(u8 type, u8 num, u64 *size)
701 {
702 	struct mtd_info *mtd = NULL;
703 
704 	if (get_mtd_info(type, num, &mtd))
705 		return 1;
706 
707 	*size = mtd->size;
708 
709 	return 0;
710 }
711 
712 /**
713  * Delete all mtd devices from a supplied devices list, free memory allocated for
714  * each device and delete all device partitions.
715  *
716  * @return 0 on success, 1 otherwise
717  */
718 static int device_delall(struct list_head *head)
719 {
720 	struct list_head *entry, *n;
721 	struct mtd_device *dev_tmp;
722 
723 	/* clean devices list */
724 	list_for_each_safe(entry, n, head) {
725 		dev_tmp = list_entry(entry, struct mtd_device, link);
726 		list_del(entry);
727 		part_delall(&dev_tmp->parts);
728 		free(dev_tmp);
729 	}
730 	INIT_LIST_HEAD(&devices);
731 
732 	return 0;
733 }
734 
735 /**
736  * If provided device exists it's partitions are deleted, device is removed
737  * from device list and device memory is freed.
738  *
739  * @param dev device to be deleted
740  * @return 0 on success, 1 otherwise
741  */
742 static int device_del(struct mtd_device *dev)
743 {
744 	part_delall(&dev->parts);
745 	list_del(&dev->link);
746 	free(dev);
747 
748 	if (dev == current_mtd_dev) {
749 		/* we just deleted current device */
750 		if (list_empty(&devices)) {
751 			current_mtd_dev = NULL;
752 		} else {
753 			/* reset first partition from first dev from the
754 			 * devices list as current */
755 			current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
756 			current_mtd_partnum = 0;
757 		}
758 		current_save();
759 		return 0;
760 	}
761 
762 	index_partitions();
763 	return 0;
764 }
765 
766 /**
767  * Search global device list and return pointer to the device of type and num
768  * specified.
769  *
770  * @param type device type
771  * @param num device number
772  * @return NULL if requested device does not exist
773  */
774 struct mtd_device *device_find(u8 type, u8 num)
775 {
776 	struct list_head *entry;
777 	struct mtd_device *dev_tmp;
778 
779 	list_for_each(entry, &devices) {
780 		dev_tmp = list_entry(entry, struct mtd_device, link);
781 
782 		if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
783 			return dev_tmp;
784 	}
785 
786 	return NULL;
787 }
788 
789 /**
790  * Add specified device to the global device list.
791  *
792  * @param dev device to be added
793  */
794 static void device_add(struct mtd_device *dev)
795 {
796 	u8 current_save_needed = 0;
797 
798 	if (list_empty(&devices)) {
799 		current_mtd_dev = dev;
800 		current_mtd_partnum = 0;
801 		current_save_needed = 1;
802 	}
803 
804 	list_add_tail(&dev->link, &devices);
805 
806 	if (current_save_needed > 0)
807 		current_save();
808 	else
809 		index_partitions();
810 }
811 
812 /**
813  * Parse device type, name and mtd-id. If syntax is ok allocate memory and
814  * return pointer to the device structure.
815  *
816  * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
817  * @param ret output pointer to next char after parse completes (output)
818  * @param retdev pointer to the allocated device (output)
819  * @return 0 on success, 1 otherwise
820  */
821 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
822 {
823 	struct mtd_device *dev;
824 	struct part_info *part;
825 	struct mtdids *id;
826 	const char *mtd_id;
827 	unsigned int mtd_id_len;
828 	const char *p;
829 	const char *pend;
830 	LIST_HEAD(tmp_list);
831 	struct list_head *entry, *n;
832 	u16 num_parts;
833 	u64 offset;
834 	int err = 1;
835 
836 	debug("===device_parse===\n");
837 
838 	assert(retdev);
839 	*retdev = NULL;
840 
841 	if (ret)
842 		*ret = NULL;
843 
844 	/* fetch <mtd-id> */
845 	mtd_id = p = mtd_dev;
846 	if (!(p = strchr(mtd_id, ':'))) {
847 		printf("no <mtd-id> identifier\n");
848 		return 1;
849 	}
850 	mtd_id_len = p - mtd_id + 1;
851 	p++;
852 
853 	/* verify if we have a valid device specified */
854 	if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
855 		printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
856 		return 1;
857 	}
858 
859 #ifdef DEBUG
860 	pend = strchr(p, ';');
861 #endif
862 	debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
863 			id->type, MTD_DEV_TYPE(id->type),
864 			id->num, id->mtd_id);
865 	debug("parsing partitions %.*s\n", (int)(pend ? pend - p : strlen(p)), p);
866 
867 
868 	/* parse partitions */
869 	num_parts = 0;
870 
871 	offset = 0;
872 	if ((dev = device_find(id->type, id->num)) != NULL) {
873 		/* if device already exists start at the end of the last partition */
874 		part = list_entry(dev->parts.prev, struct part_info, link);
875 		offset = part->offset + part->size;
876 	}
877 
878 	while (p && (*p != '\0') && (*p != ';')) {
879 		err = 1;
880 		if ((part_parse(p, &p, &part) != 0) || (!part))
881 			break;
882 
883 		/* calculate offset when not specified */
884 		if (part->offset == OFFSET_NOT_SPECIFIED)
885 			part->offset = offset;
886 		else
887 			offset = part->offset;
888 
889 		/* verify alignment and size */
890 		if (part_validate(id, part) != 0)
891 			break;
892 
893 		offset += part->size;
894 
895 		/* partition is ok, add it to the list */
896 		list_add_tail(&part->link, &tmp_list);
897 		num_parts++;
898 		err = 0;
899 	}
900 	if (err == 1) {
901 		part_delall(&tmp_list);
902 		return 1;
903 	}
904 
905 	if (num_parts == 0) {
906 		printf("no partitions for device %s%d (%s)\n",
907 				MTD_DEV_TYPE(id->type), id->num, id->mtd_id);
908 		return 1;
909 	}
910 
911 	debug("\ntotal partitions: %d\n", num_parts);
912 
913 	/* check for next device presence */
914 	if (p) {
915 		if (*p == ';') {
916 			if (ret)
917 				*ret = ++p;
918 		} else if (*p == '\0') {
919 			if (ret)
920 				*ret = p;
921 		} else {
922 			printf("unexpected character '%c' at the end of device\n", *p);
923 			if (ret)
924 				*ret = NULL;
925 			return 1;
926 		}
927 	}
928 
929 	/* allocate memory for mtd_device structure */
930 	if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
931 		printf("out of memory\n");
932 		return 1;
933 	}
934 	memset(dev, 0, sizeof(struct mtd_device));
935 	dev->id = id;
936 	dev->num_parts = 0; /* part_sort_add increments num_parts */
937 	INIT_LIST_HEAD(&dev->parts);
938 	INIT_LIST_HEAD(&dev->link);
939 
940 	/* move partitions from tmp_list to dev->parts */
941 	list_for_each_safe(entry, n, &tmp_list) {
942 		part = list_entry(entry, struct part_info, link);
943 		list_del(entry);
944 		if (part_sort_add(dev, part) != 0) {
945 			device_del(dev);
946 			return 1;
947 		}
948 	}
949 
950 	*retdev = dev;
951 
952 	debug("===\n\n");
953 	return 0;
954 }
955 
956 /**
957  * Initialize global device list.
958  *
959  * @return 0 on success, 1 otherwise
960  */
961 static int mtd_devices_init(void)
962 {
963 	last_parts[0] = '\0';
964 	current_mtd_dev = NULL;
965 	current_save();
966 
967 	return device_delall(&devices);
968 }
969 
970 /*
971  * Search global mtdids list and find id of requested type and number.
972  *
973  * @return pointer to the id if it exists, NULL otherwise
974  */
975 static struct mtdids* id_find(u8 type, u8 num)
976 {
977 	struct list_head *entry;
978 	struct mtdids *id;
979 
980 	list_for_each(entry, &mtdids) {
981 		id = list_entry(entry, struct mtdids, link);
982 
983 		if ((id->type == type) && (id->num == num))
984 			return id;
985 	}
986 
987 	return NULL;
988 }
989 
990 /**
991  * Search global mtdids list and find id of a requested mtd_id.
992  *
993  * Note: first argument is not null terminated.
994  *
995  * @param mtd_id string containing requested mtd_id
996  * @param mtd_id_len length of supplied mtd_id
997  * @return pointer to the id if it exists, NULL otherwise
998  */
999 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
1000 {
1001 	struct list_head *entry;
1002 	struct mtdids *id;
1003 
1004 	debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1005 			mtd_id_len, mtd_id, mtd_id_len);
1006 
1007 	list_for_each(entry, &mtdids) {
1008 		id = list_entry(entry, struct mtdids, link);
1009 
1010 		debug("entry: '%s' (len = %zu)\n",
1011 				id->mtd_id, strlen(id->mtd_id));
1012 
1013 		if (mtd_id_len != strlen(id->mtd_id))
1014 			continue;
1015 		if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1016 			return id;
1017 	}
1018 
1019 	return NULL;
1020 }
1021 
1022 /**
1023  * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
1024  * return device type and number.
1025  *
1026  * @param id string describing device id
1027  * @param ret_id output pointer to next char after parse completes (output)
1028  * @param dev_type parsed device type (output)
1029  * @param dev_num parsed device number (output)
1030  * @return 0 on success, 1 otherwise
1031  */
1032 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1033 		 u8 *dev_num)
1034 {
1035 	const char *p = id;
1036 
1037 	*dev_type = 0;
1038 	if (strncmp(p, "nand", 4) == 0) {
1039 		*dev_type = MTD_DEV_TYPE_NAND;
1040 		p += 4;
1041 	} else if (strncmp(p, "nor", 3) == 0) {
1042 		*dev_type = MTD_DEV_TYPE_NOR;
1043 		p += 3;
1044 	} else if (strncmp(p, "onenand", 7) == 0) {
1045 		*dev_type = MTD_DEV_TYPE_ONENAND;
1046 		p += 7;
1047 	} else {
1048 		printf("incorrect device type in %s\n", id);
1049 		return 1;
1050 	}
1051 
1052 	if (!isdigit(*p)) {
1053 		printf("incorrect device number in %s\n", id);
1054 		return 1;
1055 	}
1056 
1057 	*dev_num = simple_strtoul(p, (char **)&p, 0);
1058 	if (ret_id)
1059 		*ret_id = p;
1060 	return 0;
1061 }
1062 
1063 /**
1064  * Process all devices and generate corresponding mtdparts string describing
1065  * all partitions on all devices.
1066  *
1067  * @param buf output buffer holding generated mtdparts string (output)
1068  * @param buflen buffer size
1069  * @return 0 on success, 1 otherwise
1070  */
1071 static int generate_mtdparts(char *buf, u32 buflen)
1072 {
1073 	struct list_head *pentry, *dentry;
1074 	struct mtd_device *dev;
1075 	struct part_info *part, *prev_part;
1076 	char *p = buf;
1077 	char tmpbuf[32];
1078 	u64 size, offset;
1079 	u32 len, part_cnt;
1080 	u32 maxlen = buflen - 1;
1081 
1082 	debug("--- generate_mtdparts ---\n");
1083 
1084 	if (list_empty(&devices)) {
1085 		buf[0] = '\0';
1086 		return 0;
1087 	}
1088 
1089 	strcpy(p, "mtdparts=");
1090 	p += 9;
1091 
1092 	list_for_each(dentry, &devices) {
1093 		dev = list_entry(dentry, struct mtd_device, link);
1094 
1095 		/* copy mtd_id */
1096 		len = strlen(dev->id->mtd_id) + 1;
1097 		if (len > maxlen)
1098 			goto cleanup;
1099 		memcpy(p, dev->id->mtd_id, len - 1);
1100 		p += len - 1;
1101 		*(p++) = ':';
1102 		maxlen -= len;
1103 
1104 		/* format partitions */
1105 		prev_part = NULL;
1106 		part_cnt = 0;
1107 		list_for_each(pentry, &dev->parts) {
1108 			part = list_entry(pentry, struct part_info, link);
1109 			size = part->size;
1110 			offset = part->offset;
1111 			part_cnt++;
1112 
1113 			/* partition size */
1114 			memsize_format(tmpbuf, size);
1115 			len = strlen(tmpbuf);
1116 			if (len > maxlen)
1117 				goto cleanup;
1118 			memcpy(p, tmpbuf, len);
1119 			p += len;
1120 			maxlen -= len;
1121 
1122 
1123 			/* add offset only when there is a gap between
1124 			 * partitions */
1125 			if ((!prev_part && (offset != 0)) ||
1126 					(prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1127 
1128 				memsize_format(tmpbuf, offset);
1129 				len = strlen(tmpbuf) + 1;
1130 				if (len > maxlen)
1131 					goto cleanup;
1132 				*(p++) = '@';
1133 				memcpy(p, tmpbuf, len - 1);
1134 				p += len - 1;
1135 				maxlen -= len;
1136 			}
1137 
1138 			/* copy name only if user supplied */
1139 			if(!part->auto_name) {
1140 				len = strlen(part->name) + 2;
1141 				if (len > maxlen)
1142 					goto cleanup;
1143 
1144 				*(p++) = '(';
1145 				memcpy(p, part->name, len - 2);
1146 				p += len - 2;
1147 				*(p++) = ')';
1148 				maxlen -= len;
1149 			}
1150 
1151 			/* ro mask flag */
1152 			if (part->mask_flags && MTD_WRITEABLE_CMD) {
1153 				len = 2;
1154 				if (len > maxlen)
1155 					goto cleanup;
1156 				*(p++) = 'r';
1157 				*(p++) = 'o';
1158 				maxlen -= 2;
1159 			}
1160 
1161 			/* print ',' separator if there are other partitions
1162 			 * following */
1163 			if (dev->num_parts > part_cnt) {
1164 				if (1 > maxlen)
1165 					goto cleanup;
1166 				*(p++) = ',';
1167 				maxlen--;
1168 			}
1169 			prev_part = part;
1170 		}
1171 		/* print ';' separator if there are other devices following */
1172 		if (dentry->next != &devices) {
1173 			if (1 > maxlen)
1174 				goto cleanup;
1175 			*(p++) = ';';
1176 			maxlen--;
1177 		}
1178 	}
1179 
1180 	/* we still have at least one char left, as we decremented maxlen at
1181 	 * the begining */
1182 	*p = '\0';
1183 
1184 	return 0;
1185 
1186 cleanup:
1187 	last_parts[0] = '\0';
1188 	return 1;
1189 }
1190 
1191 /**
1192  * Call generate_mtdparts to process all devices and generate corresponding
1193  * mtdparts string, save it in mtdparts environment variable.
1194  *
1195  * @param buf output buffer holding generated mtdparts string (output)
1196  * @param buflen buffer size
1197  * @return 0 on success, 1 otherwise
1198  */
1199 static int generate_mtdparts_save(char *buf, u32 buflen)
1200 {
1201 	int ret;
1202 
1203 	ret = generate_mtdparts(buf, buflen);
1204 
1205 	if ((buf[0] != '\0') && (ret == 0))
1206 		setenv("mtdparts", buf);
1207 	else
1208 		setenv("mtdparts", NULL);
1209 
1210 	return ret;
1211 }
1212 
1213 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1214 /**
1215  * Get the net size (w/o bad blocks) of the given partition.
1216  *
1217  * @param mtd the mtd info
1218  * @param part the partition
1219  * @return the calculated net size of this partition
1220  */
1221 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1222 {
1223 	uint64_t i, net_size = 0;
1224 
1225 	if (!mtd->block_isbad)
1226 		return part->size;
1227 
1228 	for (i = 0; i < part->size; i += mtd->erasesize) {
1229 		if (!mtd->block_isbad(mtd, part->offset + i))
1230 			net_size += mtd->erasesize;
1231 	}
1232 
1233 	return net_size;
1234 }
1235 #endif
1236 
1237 static void print_partition_table(void)
1238 {
1239 	struct list_head *dentry, *pentry;
1240 	struct part_info *part;
1241 	struct mtd_device *dev;
1242 	int part_num;
1243 
1244 	list_for_each(dentry, &devices) {
1245 		dev = list_entry(dentry, struct mtd_device, link);
1246 		/* list partitions for given device */
1247 		part_num = 0;
1248 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1249 		struct mtd_info *mtd;
1250 
1251 		if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1252 			return;
1253 
1254 		printf("\ndevice %s%d <%s>, # parts = %d\n",
1255 				MTD_DEV_TYPE(dev->id->type), dev->id->num,
1256 				dev->id->mtd_id, dev->num_parts);
1257 		printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1258 
1259 		list_for_each(pentry, &dev->parts) {
1260 			u32 net_size;
1261 			char *size_note;
1262 
1263 			part = list_entry(pentry, struct part_info, link);
1264 			net_size = net_part_size(mtd, part);
1265 			size_note = part->size == net_size ? " " : " (!)";
1266 			printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n",
1267 					part_num, part->name, part->size,
1268 					net_size, size_note, part->offset,
1269 					part->mask_flags);
1270 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1271 		printf("\ndevice %s%d <%s>, # parts = %d\n",
1272 				MTD_DEV_TYPE(dev->id->type), dev->id->num,
1273 				dev->id->mtd_id, dev->num_parts);
1274 		printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1275 
1276 		list_for_each(pentry, &dev->parts) {
1277 			part = list_entry(pentry, struct part_info, link);
1278 			printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1279 					part_num, part->name, part->size,
1280 					part->offset, part->mask_flags);
1281 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1282 			part_num++;
1283 		}
1284 	}
1285 
1286 	if (list_empty(&devices))
1287 		printf("no partitions defined\n");
1288 }
1289 
1290 /**
1291  * Format and print out a partition list for each device from global device
1292  * list.
1293  */
1294 static void list_partitions(void)
1295 {
1296 	struct part_info *part;
1297 
1298 	debug("\n---list_partitions---\n");
1299 	print_partition_table();
1300 
1301 	/* current_mtd_dev is not NULL only when we have non empty device list */
1302 	if (current_mtd_dev) {
1303 		part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1304 		if (part) {
1305 			printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1306 					MTD_DEV_TYPE(current_mtd_dev->id->type),
1307 					current_mtd_dev->id->num, current_mtd_partnum,
1308 					part->name, part->size, part->offset);
1309 		} else {
1310 			printf("could not get current partition info\n\n");
1311 		}
1312 	}
1313 
1314 	printf("\ndefaults:\n");
1315 	printf("mtdids  : %s\n",
1316 		mtdids_default ? mtdids_default : "none");
1317 	/*
1318 	 * Using printf() here results in printbuffer overflow
1319 	 * if default mtdparts string is greater than console
1320 	 * printbuffer. Use puts() to prevent system crashes.
1321 	 */
1322 	puts("mtdparts: ");
1323 	puts(mtdparts_default ? mtdparts_default : "none");
1324 	puts("\n");
1325 }
1326 
1327 /**
1328  * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1329  * corresponding device and verify partition number.
1330  *
1331  * @param id string describing device and partition or partition name
1332  * @param dev pointer to the requested device (output)
1333  * @param part_num verified partition number (output)
1334  * @param part pointer to requested partition (output)
1335  * @return 0 on success, 1 otherwise
1336  */
1337 int find_dev_and_part(const char *id, struct mtd_device **dev,
1338 		u8 *part_num, struct part_info **part)
1339 {
1340 	struct list_head *dentry, *pentry;
1341 	u8 type, dnum, pnum;
1342 	const char *p;
1343 
1344 	debug("--- find_dev_and_part ---\nid = %s\n", id);
1345 
1346 	list_for_each(dentry, &devices) {
1347 		*part_num = 0;
1348 		*dev = list_entry(dentry, struct mtd_device, link);
1349 		list_for_each(pentry, &(*dev)->parts) {
1350 			*part = list_entry(pentry, struct part_info, link);
1351 			if (strcmp((*part)->name, id) == 0)
1352 				return 0;
1353 			(*part_num)++;
1354 		}
1355 	}
1356 
1357 	p = id;
1358 	*dev = NULL;
1359 	*part = NULL;
1360 	*part_num = 0;
1361 
1362 	if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1363 		return 1;
1364 
1365 	if ((*p++ != ',') || (*p == '\0')) {
1366 		printf("no partition number specified\n");
1367 		return 1;
1368 	}
1369 	pnum = simple_strtoul(p, (char **)&p, 0);
1370 	if (*p != '\0') {
1371 		printf("unexpected trailing character '%c'\n", *p);
1372 		return 1;
1373 	}
1374 
1375 	if ((*dev = device_find(type, dnum)) == NULL) {
1376 		printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1377 		return 1;
1378 	}
1379 
1380 	if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1381 		printf("no such partition\n");
1382 		*dev = NULL;
1383 		return 1;
1384 	}
1385 
1386 	*part_num = pnum;
1387 
1388 	return 0;
1389 }
1390 
1391 /**
1392  * Find and delete partition. For partition id format see find_dev_and_part().
1393  *
1394  * @param id string describing device and partition
1395  * @return 0 on success, 1 otherwise
1396  */
1397 static int delete_partition(const char *id)
1398 {
1399 	u8 pnum;
1400 	struct mtd_device *dev;
1401 	struct part_info *part;
1402 
1403 	if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1404 
1405 		debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1406 				MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1407 				part->name, part->size, part->offset);
1408 
1409 		if (part_del(dev, part) != 0)
1410 			return 1;
1411 
1412 		if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1413 			printf("generated mtdparts too long, resetting to null\n");
1414 			return 1;
1415 		}
1416 		return 0;
1417 	}
1418 
1419 	printf("partition %s not found\n", id);
1420 	return 1;
1421 }
1422 
1423 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1424 /**
1425  * Increase the size of the given partition so that it's net size is at least
1426  * as large as the size member and such that the next partition would start on a
1427  * good block if it were adjacent to this partition.
1428  *
1429  * @param mtd the mtd device
1430  * @param part the partition
1431  * @param next_offset pointer to the offset of the next partition after this
1432  *                    partition's size has been modified (output)
1433  */
1434 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1435 			     uint64_t *next_offset)
1436 {
1437 	uint64_t net_size, padding_size = 0;
1438 	int truncated;
1439 
1440 	mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1441 			     &truncated);
1442 
1443 	/*
1444 	 * Absorb bad blocks immediately following this
1445 	 * partition also into the partition, such that
1446 	 * the next partition starts with a good block.
1447 	 */
1448 	if (!truncated) {
1449 		mtd_get_len_incl_bad(mtd, part->offset + net_size,
1450 				     mtd->erasesize, &padding_size, &truncated);
1451 		if (truncated)
1452 			padding_size = 0;
1453 		else
1454 			padding_size -= mtd->erasesize;
1455 	}
1456 
1457 	if (truncated) {
1458 		printf("truncated partition %s to %lld bytes\n", part->name,
1459 		       (uint64_t) net_size + padding_size);
1460 	}
1461 
1462 	part->size = net_size + padding_size;
1463 	*next_offset = part->offset + part->size;
1464 }
1465 
1466 /**
1467  * Adjust all of the partition sizes, such that all partitions are at least
1468  * as big as their mtdparts environment variable sizes and they each start
1469  * on a good block.
1470  *
1471  * @return 0 on success, 1 otherwise
1472  */
1473 static int spread_partitions(void)
1474 {
1475 	struct list_head *dentry, *pentry;
1476 	struct mtd_device *dev;
1477 	struct part_info *part;
1478 	struct mtd_info *mtd;
1479 	int part_num;
1480 	uint64_t cur_offs;
1481 
1482 	list_for_each(dentry, &devices) {
1483 		dev = list_entry(dentry, struct mtd_device, link);
1484 
1485 		if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1486 			return 1;
1487 
1488 		part_num = 0;
1489 		cur_offs = 0;
1490 		list_for_each(pentry, &dev->parts) {
1491 			part = list_entry(pentry, struct part_info, link);
1492 
1493 			debug("spread_partitions: device = %s%d, partition %d ="
1494 				" (%s) 0x%08x@0x%08x\n",
1495 				MTD_DEV_TYPE(dev->id->type), dev->id->num,
1496 				part_num, part->name, part->size,
1497 				part->offset);
1498 
1499 			if (cur_offs > part->offset)
1500 				part->offset = cur_offs;
1501 
1502 			spread_partition(mtd, part, &cur_offs);
1503 
1504 			part_num++;
1505 		}
1506 	}
1507 
1508 	index_partitions();
1509 
1510 	if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1511 		printf("generated mtdparts too long, resetting to null\n");
1512 		return 1;
1513 	}
1514 	return 0;
1515 }
1516 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1517 
1518 /**
1519  * Accept character string describing mtd partitions and call device_parse()
1520  * for each entry. Add created devices to the global devices list.
1521  *
1522  * @param mtdparts string specifing mtd partitions
1523  * @return 0 on success, 1 otherwise
1524  */
1525 static int parse_mtdparts(const char *const mtdparts)
1526 {
1527 	const char *p = mtdparts;
1528 	struct mtd_device *dev;
1529 	int err = 1;
1530 	char tmp_parts[MTDPARTS_MAXLEN];
1531 
1532 	debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", p);
1533 
1534 	/* delete all devices and partitions */
1535 	if (mtd_devices_init() != 0) {
1536 		printf("could not initialise device list\n");
1537 		return err;
1538 	}
1539 
1540 	/* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1541 	if (gd->flags & GD_FLG_ENV_READY) {
1542 		p = getenv("mtdparts");
1543 	} else {
1544 		p = tmp_parts;
1545 		getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1546 	}
1547 
1548 	if (strncmp(p, "mtdparts=", 9) != 0) {
1549 		printf("mtdparts variable doesn't start with 'mtdparts='\n");
1550 		return err;
1551 	}
1552 	p += 9;
1553 
1554 	while (p && (*p != '\0')) {
1555 		err = 1;
1556 		if ((device_parse(p, &p, &dev) != 0) || (!dev))
1557 			break;
1558 
1559 		debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1560 				dev->id->num, dev->id->mtd_id);
1561 
1562 		/* check if parsed device is already on the list */
1563 		if (device_find(dev->id->type, dev->id->num) != NULL) {
1564 			printf("device %s%d redefined, please correct mtdparts variable\n",
1565 					MTD_DEV_TYPE(dev->id->type), dev->id->num);
1566 			break;
1567 		}
1568 
1569 		list_add_tail(&dev->link, &devices);
1570 		err = 0;
1571 	}
1572 	if (err == 1) {
1573 		device_delall(&devices);
1574 		return 1;
1575 	}
1576 
1577 	return 0;
1578 }
1579 
1580 /**
1581  * Parse provided string describing mtdids mapping (see file header for mtdids
1582  * variable format). Allocate memory for each entry and add all found entries
1583  * to the global mtdids list.
1584  *
1585  * @param ids mapping string
1586  * @return 0 on success, 1 otherwise
1587  */
1588 static int parse_mtdids(const char *const ids)
1589 {
1590 	const char *p = ids;
1591 	const char *mtd_id;
1592 	int mtd_id_len;
1593 	struct mtdids *id;
1594 	struct list_head *entry, *n;
1595 	struct mtdids *id_tmp;
1596 	u8 type, num;
1597 	u64 size;
1598 	int ret = 1;
1599 
1600 	debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1601 
1602 	/* clean global mtdids list */
1603 	list_for_each_safe(entry, n, &mtdids) {
1604 		id_tmp = list_entry(entry, struct mtdids, link);
1605 		debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1606 		list_del(entry);
1607 		free(id_tmp);
1608 	}
1609 	last_ids[0] = '\0';
1610 	INIT_LIST_HEAD(&mtdids);
1611 
1612 	while(p && (*p != '\0')) {
1613 
1614 		ret = 1;
1615 		/* parse 'nor'|'nand'|'onenand'<dev-num> */
1616 		if (mtd_id_parse(p, &p, &type, &num) != 0)
1617 			break;
1618 
1619 		if (*p != '=') {
1620 			printf("mtdids: incorrect <dev-num>\n");
1621 			break;
1622 		}
1623 		p++;
1624 
1625 		/* check if requested device exists */
1626 		if (mtd_device_validate(type, num, &size) != 0)
1627 			return 1;
1628 
1629 		/* locate <mtd-id> */
1630 		mtd_id = p;
1631 		if ((p = strchr(mtd_id, ',')) != NULL) {
1632 			mtd_id_len = p - mtd_id + 1;
1633 			p++;
1634 		} else {
1635 			mtd_id_len = strlen(mtd_id) + 1;
1636 		}
1637 		if (mtd_id_len == 0) {
1638 			printf("mtdids: no <mtd-id> identifier\n");
1639 			break;
1640 		}
1641 
1642 		/* check if this id is already on the list */
1643 		int double_entry = 0;
1644 		list_for_each(entry, &mtdids) {
1645 			id_tmp = list_entry(entry, struct mtdids, link);
1646 			if ((id_tmp->type == type) && (id_tmp->num == num)) {
1647 				double_entry = 1;
1648 				break;
1649 			}
1650 		}
1651 		if (double_entry) {
1652 			printf("device id %s%d redefined, please correct mtdids variable\n",
1653 					MTD_DEV_TYPE(type), num);
1654 			break;
1655 		}
1656 
1657 		/* allocate mtdids structure */
1658 		if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1659 			printf("out of memory\n");
1660 			break;
1661 		}
1662 		memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1663 		id->num = num;
1664 		id->type = type;
1665 		id->size = size;
1666 		id->mtd_id = (char *)(id + 1);
1667 		strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1668 		id->mtd_id[mtd_id_len - 1] = '\0';
1669 		INIT_LIST_HEAD(&id->link);
1670 
1671 		debug("+ id %s%d\t%16lld bytes\t%s\n",
1672 				MTD_DEV_TYPE(id->type), id->num,
1673 				id->size, id->mtd_id);
1674 
1675 		list_add_tail(&id->link, &mtdids);
1676 		ret = 0;
1677 	}
1678 	if (ret == 1) {
1679 		/* clean mtdids list and free allocated memory */
1680 		list_for_each_safe(entry, n, &mtdids) {
1681 			id_tmp = list_entry(entry, struct mtdids, link);
1682 			list_del(entry);
1683 			free(id_tmp);
1684 		}
1685 		return 1;
1686 	}
1687 
1688 	return 0;
1689 }
1690 
1691 /**
1692  * Parse and initialize global mtdids mapping and create global
1693  * device/partition list.
1694  *
1695  * @return 0 on success, 1 otherwise
1696  */
1697 int mtdparts_init(void)
1698 {
1699 	static int initialized = 0;
1700 	const char *ids, *parts;
1701 	const char *current_partition;
1702 	int ids_changed;
1703 	char tmp_ep[PARTITION_MAXLEN];
1704 	char tmp_parts[MTDPARTS_MAXLEN];
1705 
1706 	debug("\n---mtdparts_init---\n");
1707 	if (!initialized) {
1708 		INIT_LIST_HEAD(&mtdids);
1709 		INIT_LIST_HEAD(&devices);
1710 		memset(last_ids, 0, MTDIDS_MAXLEN);
1711 		memset(last_parts, 0, MTDPARTS_MAXLEN);
1712 		memset(last_partition, 0, PARTITION_MAXLEN);
1713 		initialized = 1;
1714 	}
1715 
1716 	/* get variables */
1717 	ids = getenv("mtdids");
1718 	/*
1719 	 * The mtdparts variable tends to be long. If we need to access it
1720 	 * before the env is relocated, then we need to use our own stack
1721 	 * buffer.  gd->env_buf will be too small.
1722 	 */
1723 	if (gd->flags & GD_FLG_ENV_READY) {
1724 		parts = getenv("mtdparts");
1725 	} else {
1726 		parts = tmp_parts;
1727 		getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1728 	}
1729 	current_partition = getenv("partition");
1730 
1731 	/* save it for later parsing, cannot rely on current partition pointer
1732 	 * as 'partition' variable may be updated during init */
1733 	tmp_ep[0] = '\0';
1734 	if (current_partition)
1735 		strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1736 
1737 	debug("last_ids  : %s\n", last_ids);
1738 	debug("env_ids   : %s\n", ids);
1739 	debug("last_parts: %s\n", last_parts);
1740 	debug("env_parts : %s\n\n", parts);
1741 
1742 	debug("last_partition : %s\n", last_partition);
1743 	debug("env_partition  : %s\n", current_partition);
1744 
1745 	/* if mtdids varible is empty try to use defaults */
1746 	if (!ids) {
1747 		if (mtdids_default) {
1748 			debug("mtdids variable not defined, using default\n");
1749 			ids = mtdids_default;
1750 			setenv("mtdids", (char *)ids);
1751 		} else {
1752 			printf("mtdids not defined, no default present\n");
1753 			return 1;
1754 		}
1755 	}
1756 	if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1757 		printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1758 		return 1;
1759 	}
1760 
1761 	/* do no try to use defaults when mtdparts variable is not defined,
1762 	 * just check the length */
1763 	if (!parts)
1764 		printf("mtdparts variable not set, see 'help mtdparts'\n");
1765 
1766 	if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1767 		printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1768 		return 1;
1769 	}
1770 
1771 	/* check if we have already parsed those mtdids */
1772 	if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1773 		ids_changed = 0;
1774 	} else {
1775 		ids_changed = 1;
1776 
1777 		if (parse_mtdids(ids) != 0) {
1778 			mtd_devices_init();
1779 			return 1;
1780 		}
1781 
1782 		/* ok it's good, save new ids */
1783 		strncpy(last_ids, ids, MTDIDS_MAXLEN);
1784 	}
1785 
1786 	/* parse partitions if either mtdparts or mtdids were updated */
1787 	if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1788 		if (parse_mtdparts(parts) != 0)
1789 			return 1;
1790 
1791 		if (list_empty(&devices)) {
1792 			printf("mtdparts_init: no valid partitions\n");
1793 			return 1;
1794 		}
1795 
1796 		/* ok it's good, save new parts */
1797 		strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1798 
1799 		/* reset first partition from first dev from the list as current */
1800 		current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1801 		current_mtd_partnum = 0;
1802 		current_save();
1803 
1804 		debug("mtdparts_init: current_mtd_dev  = %s%d, current_mtd_partnum = %d\n",
1805 				MTD_DEV_TYPE(current_mtd_dev->id->type),
1806 				current_mtd_dev->id->num, current_mtd_partnum);
1807 	}
1808 
1809 	/* mtdparts variable was reset to NULL, delete all devices/partitions */
1810 	if (!parts && (last_parts[0] != '\0'))
1811 		return mtd_devices_init();
1812 
1813 	/* do not process current partition if mtdparts variable is null */
1814 	if (!parts)
1815 		return 0;
1816 
1817 	/* is current partition set in environment? if so, use it */
1818 	if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1819 		struct part_info *p;
1820 		struct mtd_device *cdev;
1821 		u8 pnum;
1822 
1823 		debug("--- getting current partition: %s\n", tmp_ep);
1824 
1825 		if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1826 			current_mtd_dev = cdev;
1827 			current_mtd_partnum = pnum;
1828 			current_save();
1829 		}
1830 	} else if (getenv("partition") == NULL) {
1831 		debug("no partition variable set, setting...\n");
1832 		current_save();
1833 	}
1834 
1835 	return 0;
1836 }
1837 
1838 /**
1839  * Return pointer to the partition of a requested number from a requested
1840  * device.
1841  *
1842  * @param dev device that is to be searched for a partition
1843  * @param part_num requested partition number
1844  * @return pointer to the part_info, NULL otherwise
1845  */
1846 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1847 {
1848 	struct list_head *entry;
1849 	struct part_info *part;
1850 	int num;
1851 
1852 	if (!dev)
1853 		return NULL;
1854 
1855 	debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1856 			part_num, MTD_DEV_TYPE(dev->id->type),
1857 			dev->id->num, dev->id->mtd_id);
1858 
1859 	if (part_num >= dev->num_parts) {
1860 		printf("invalid partition number %d for device %s%d (%s)\n",
1861 				part_num, MTD_DEV_TYPE(dev->id->type),
1862 				dev->id->num, dev->id->mtd_id);
1863 		return NULL;
1864 	}
1865 
1866 	/* locate partition number, return it */
1867 	num = 0;
1868 	list_for_each(entry, &dev->parts) {
1869 		part = list_entry(entry, struct part_info, link);
1870 
1871 		if (part_num == num++) {
1872 			return part;
1873 		}
1874 	}
1875 
1876 	return NULL;
1877 }
1878 
1879 /***************************************************/
1880 /* U-Boot commands				   */
1881 /***************************************************/
1882 /* command line only */
1883 /**
1884  * Routine implementing u-boot chpart command. Sets new current partition based
1885  * on the user supplied partition id. For partition id format see find_dev_and_part().
1886  *
1887  * @param cmdtp command internal data
1888  * @param flag command flag
1889  * @param argc number of arguments supplied to the command
1890  * @param argv arguments list
1891  * @return 0 on success, 1 otherwise
1892  */
1893 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1894 {
1895 /* command line only */
1896 	struct mtd_device *dev;
1897 	struct part_info *part;
1898 	u8 pnum;
1899 
1900 	if (mtdparts_init() !=0)
1901 		return 1;
1902 
1903 	if (argc < 2) {
1904 		printf("no partition id specified\n");
1905 		return 1;
1906 	}
1907 
1908 	if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1909 		return 1;
1910 
1911 	current_mtd_dev = dev;
1912 	current_mtd_partnum = pnum;
1913 	current_save();
1914 
1915 	printf("partition changed to %s%d,%d\n",
1916 			MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1917 
1918 	return 0;
1919 }
1920 
1921 /**
1922  * Routine implementing u-boot mtdparts command. Initialize/update default global
1923  * partition list and process user partition request (list, add, del).
1924  *
1925  * @param cmdtp command internal data
1926  * @param flag command flag
1927  * @param argc number of arguments supplied to the command
1928  * @param argv arguments list
1929  * @return 0 on success, 1 otherwise
1930  */
1931 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1932 		       char * const argv[])
1933 {
1934 	if (argc == 2) {
1935 		if (strcmp(argv[1], "default") == 0) {
1936 			setenv("mtdids", (char *)mtdids_default);
1937 			setenv("mtdparts", (char *)mtdparts_default);
1938 			setenv("partition", NULL);
1939 
1940 			mtdparts_init();
1941 			return 0;
1942 		} else if (strcmp(argv[1], "delall") == 0) {
1943 			/* this may be the first run, initialize lists if needed */
1944 			mtdparts_init();
1945 
1946 			setenv("mtdparts", NULL);
1947 
1948 			/* mtd_devices_init() calls current_save() */
1949 			return mtd_devices_init();
1950 		}
1951 	}
1952 
1953 	/* make sure we are in sync with env variables */
1954 	if (mtdparts_init() != 0)
1955 		return 1;
1956 
1957 	if (argc == 1) {
1958 		list_partitions();
1959 		return 0;
1960 	}
1961 
1962 	/* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1963 	if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1964 #define PART_ADD_DESC_MAXLEN 64
1965 		char tmpbuf[PART_ADD_DESC_MAXLEN];
1966 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1967 		struct mtd_info *mtd;
1968 		uint64_t next_offset;
1969 #endif
1970 		u8 type, num, len;
1971 		struct mtd_device *dev;
1972 		struct mtd_device *dev_tmp;
1973 		struct mtdids *id;
1974 		struct part_info *p;
1975 
1976 		if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
1977 			return 1;
1978 
1979 		if ((id = id_find(type, num)) == NULL) {
1980 			printf("no such device %s defined in mtdids variable\n", argv[2]);
1981 			return 1;
1982 		}
1983 
1984 		len = strlen(id->mtd_id) + 1;	/* 'mtd_id:' */
1985 		len += strlen(argv[3]);		/* size@offset */
1986 		len += strlen(argv[4]) + 2;	/* '(' name ')' */
1987 		if (argv[5] && (strlen(argv[5]) == 2))
1988 			len += 2;		/* 'ro' */
1989 
1990 		if (len >= PART_ADD_DESC_MAXLEN) {
1991 			printf("too long partition description\n");
1992 			return 1;
1993 		}
1994 		sprintf(tmpbuf, "%s:%s(%s)%s",
1995 				id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
1996 		debug("add tmpbuf: %s\n", tmpbuf);
1997 
1998 		if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
1999 			return 1;
2000 
2001 		debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2002 				dev->id->num, dev->id->mtd_id);
2003 
2004 		p = list_entry(dev->parts.next, struct part_info, link);
2005 
2006 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2007 		if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2008 			return 1;
2009 
2010 		if (!strcmp(&argv[1][3], ".spread")) {
2011 			spread_partition(mtd, p, &next_offset);
2012 			debug("increased %s to %d bytes\n", p->name, p->size);
2013 		}
2014 #endif
2015 
2016 		dev_tmp = device_find(dev->id->type, dev->id->num);
2017 		if (dev_tmp == NULL) {
2018 			device_add(dev);
2019 		} else if (part_add(dev_tmp, p) != 0) {
2020 			/* merge new partition with existing ones*/
2021 			device_del(dev);
2022 			return 1;
2023 		}
2024 
2025 		if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2026 			printf("generated mtdparts too long, resetting to null\n");
2027 			return 1;
2028 		}
2029 
2030 		return 0;
2031 	}
2032 
2033 	/* mtdparts del part-id */
2034 	if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2035 		debug("del: part-id = %s\n", argv[2]);
2036 
2037 		return delete_partition(argv[2]);
2038 	}
2039 
2040 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2041 	if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2042 		return spread_partitions();
2043 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2044 
2045 	return CMD_RET_USAGE;
2046 }
2047 
2048 /***************************************************/
2049 U_BOOT_CMD(
2050 	chpart,	2,	0,	do_chpart,
2051 	"change active partition",
2052 	"part-id\n"
2053 	"    - change active partition (e.g. part-id = nand0,1)"
2054 );
2055 
2056 #ifdef CONFIG_SYS_LONGHELP
2057 static char mtdparts_help_text[] =
2058 	"\n"
2059 	"    - list partition table\n"
2060 	"mtdparts delall\n"
2061 	"    - delete all partitions\n"
2062 	"mtdparts del part-id\n"
2063 	"    - delete partition (e.g. part-id = nand0,1)\n"
2064 	"mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2065 	"    - add partition\n"
2066 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2067 	"mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2068 	"    - add partition, padding size by skipping bad blocks\n"
2069 #endif
2070 	"mtdparts default\n"
2071 	"    - reset partition table to defaults\n"
2072 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2073 	"mtdparts spread\n"
2074 	"    - adjust the sizes of the partitions so they are\n"
2075 	"      at least as big as the mtdparts variable specifies\n"
2076 	"      and they each start on a good block\n\n"
2077 #else
2078 	"\n"
2079 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2080 	"-----\n\n"
2081 	"this command uses three environment variables:\n\n"
2082 	"'partition' - keeps current partition identifier\n\n"
2083 	"partition  := <part-id>\n"
2084 	"<part-id>  := <dev-id>,part_num\n\n"
2085 	"'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2086 	"mtdids=<idmap>[,<idmap>,...]\n\n"
2087 	"<idmap>    := <dev-id>=<mtd-id>\n"
2088 	"<dev-id>   := 'nand'|'nor'|'onenand'<dev-num>\n"
2089 	"<dev-num>  := mtd device number, 0...\n"
2090 	"<mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2091 	"'mtdparts' - partition list\n\n"
2092 	"mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2093 	"<mtd-def>  := <mtd-id>:<part-def>[,<part-def>...]\n"
2094 	"<mtd-id>   := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2095 	"<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2096 	"<size>     := standard linux memsize OR '-' to denote all remaining space\n"
2097 	"<offset>   := partition start offset within the device\n"
2098 	"<name>     := '(' NAME ')'\n"
2099 	"<ro-flag>  := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2100 #endif
2101 
2102 U_BOOT_CMD(
2103 	mtdparts,	6,	0,	do_mtdparts,
2104 	"define flash/nand partitions", mtdparts_help_text
2105 );
2106 /***************************************************/
2107