]>
git.ipfire.org Git - people/ms/u-boot.git/blob - common/cmd_mtdparts.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
9 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
12 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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
18 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
19 * Copyright 2002 SYSGO Real-Time Solutions GmbH
21 * See file CREDITS for list of people who contributed to this
24 * This program is free software; you can redistribute it and/or
25 * modify it under the terms of the GNU General Public License as
26 * published by the Free Software Foundation; either version 2 of
27 * the License, or (at your option) any later version.
29 * This program is distributed in the hope that it will be useful,
30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
32 * GNU General Public License for more details.
34 * You should have received a copy of the GNU General Public License
35 * along with this program; if not, write to the Free Software
36 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
41 * Three environment variables are used by the parsing routines:
43 * 'partition' - keeps current partition identifier
45 * partition := <part-id>
46 * <part-id> := <dev-id>,part_num
49 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
51 * mtdids=<idmap>[,<idmap>,...]
53 * <idmap> := <dev-id>=<mtd-id>
54 * <dev-id> := 'nand'|'nor'|'onenand'<dev-num>
55 * <dev-num> := mtd device number, 0...
56 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
59 * 'mtdparts' - partition list
61 * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
63 * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
64 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
65 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
66 * <size> := standard linux memsize OR '-' to denote all remaining space
67 * <offset> := partition start offset within the device
68 * <name> := '(' NAME ')'
69 * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
72 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
73 * - if the above variables are not set defaults for a given target are used
77 * 1 NOR Flash, with 1 single writable partition:
78 * mtdids=nor0=edb7312-nor
79 * mtdparts=mtdparts=edb7312-nor:-
81 * 1 NOR Flash with 2 partitions, 1 NAND with one
82 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
83 * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
90 #include <jffs2/load_kernel.h>
91 #include <linux/list.h>
92 #include <linux/ctype.h>
93 #include <linux/err.h>
94 #include <linux/mtd/mtd.h>
96 #if defined(CONFIG_CMD_NAND)
97 #include <linux/mtd/nand.h>
101 #if defined(CONFIG_CMD_ONENAND)
102 #include <linux/mtd/onenand.h>
103 #include <onenand_uboot.h>
106 /* special size referring to all the remaining space in a partition */
107 #define SIZE_REMAINING 0xFFFFFFFF
109 /* special offset value, it is used when not provided by user
111 * this value is used temporarily during parsing, later such offests
112 * are recalculated */
113 #define OFFSET_NOT_SPECIFIED 0xFFFFFFFF
115 /* minimum partition size */
116 #define MIN_PART_SIZE 4096
118 /* this flag needs to be set in part_info struct mask_flags
119 * field for read-only partitions */
120 #define MTD_WRITEABLE_CMD 1
122 /* default values for mtdids and mtdparts variables */
123 #if defined(MTDIDS_DEFAULT)
124 static const char *const mtdids_default
= MTDIDS_DEFAULT
;
126 static const char *const mtdids_default
= NULL
;
129 #if defined(MTDPARTS_DEFAULT)
130 static const char *const mtdparts_default
= MTDPARTS_DEFAULT
;
132 static const char *const mtdparts_default
= NULL
;
135 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
136 #define MTDIDS_MAXLEN 128
137 #define MTDPARTS_MAXLEN 512
138 #define PARTITION_MAXLEN 16
139 static char last_ids
[MTDIDS_MAXLEN
];
140 static char last_parts
[MTDPARTS_MAXLEN
];
141 static char last_partition
[PARTITION_MAXLEN
];
143 /* low level jffs2 cache cleaning routine */
144 extern void jffs2_free_cache(struct part_info
*part
);
146 /* mtdids mapping list, filled by parse_ids() */
147 struct list_head mtdids
;
149 /* device/partition list, parse_cmdline() parses into here */
150 struct list_head devices
;
152 /* current active device and partition number */
153 struct mtd_device
*current_mtd_dev
= NULL
;
154 u8 current_mtd_partnum
= 0;
156 static struct part_info
* mtd_part_info(struct mtd_device
*dev
, unsigned int part_num
);
158 /* command line only routines */
159 static struct mtdids
* id_find_by_mtd_id(const char *mtd_id
, unsigned int mtd_id_len
);
160 static int device_del(struct mtd_device
*dev
);
163 * Parses a string into a number. The number stored at ptr is
164 * potentially suffixed with K (for kilobytes, or 1024 bytes),
165 * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
166 * 1073741824). If the number is suffixed with K, M, or G, then
167 * the return value is the number multiplied by one kilobyte, one
168 * megabyte, or one gigabyte, respectively.
170 * @param ptr where parse begins
171 * @param retptr output pointer to next char after parse completes (output)
172 * @return resulting unsigned int
174 static unsigned long memsize_parse (const char *const ptr
, const char **retptr
)
176 unsigned long ret
= simple_strtoul(ptr
, (char **)retptr
, 0);
197 * Format string describing supplied size. This routine does the opposite job
198 * to memsize_parse(). Size in bytes is converted to string and if possible
199 * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
201 * Note, that this routine does not check for buffer overflow, it's the caller
202 * who must assure enough space.
204 * @param buf output buffer
205 * @param size size to be converted to string
207 static void memsize_format(char *buf
, u32 size
)
209 #define SIZE_GB ((u32)1024*1024*1024)
210 #define SIZE_MB ((u32)1024*1024)
211 #define SIZE_KB ((u32)1024)
213 if ((size
% SIZE_GB
) == 0)
214 sprintf(buf
, "%ug", size
/SIZE_GB
);
215 else if ((size
% SIZE_MB
) == 0)
216 sprintf(buf
, "%um", size
/SIZE_MB
);
217 else if (size
% SIZE_KB
== 0)
218 sprintf(buf
, "%uk", size
/SIZE_KB
);
220 sprintf(buf
, "%u", size
);
224 * This routine does global indexing of all partitions. Resulting index for
225 * current partition is saved in 'mtddevnum'. Current partition name in
228 static void index_partitions(void)
232 struct part_info
*part
;
233 struct list_head
*dentry
;
234 struct mtd_device
*dev
;
236 debug("--- index partitions ---\n");
238 if (current_mtd_dev
) {
240 list_for_each(dentry
, &devices
) {
241 dev
= list_entry(dentry
, struct mtd_device
, link
);
242 if (dev
== current_mtd_dev
) {
243 mtddevnum
+= current_mtd_partnum
;
244 sprintf(buf
, "%d", mtddevnum
);
245 setenv("mtddevnum", buf
);
248 mtddevnum
+= dev
->num_parts
;
251 part
= mtd_part_info(current_mtd_dev
, current_mtd_partnum
);
252 setenv("mtddevname", part
->name
);
254 debug("=> mtddevnum %d,\n=> mtddevname %s\n", mtddevnum
, part
->name
);
256 setenv("mtddevnum", NULL
);
257 setenv("mtddevname", NULL
);
259 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
264 * Save current device and partition in environment variable 'partition'.
266 static void current_save(void)
270 debug("--- current_save ---\n");
272 if (current_mtd_dev
) {
273 sprintf(buf
, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev
->id
->type
),
274 current_mtd_dev
->id
->num
, current_mtd_partnum
);
276 setenv("partition", buf
);
277 strncpy(last_partition
, buf
, 16);
279 debug("=> partition %s\n", buf
);
281 setenv("partition", NULL
);
282 last_partition
[0] = '\0';
284 debug("=> partition NULL\n");
290 * Performs sanity check for supplied flash partition.
291 * Table of existing MTD flash devices is searched and partition device
292 * is located. Alignment with the granularity of nand erasesize is verified.
294 * @param id of the parent device
295 * @param part partition to validate
296 * @return 0 if partition is valid, 1 otherwise
298 static int part_validate_eraseblock(struct mtdids
*id
, struct part_info
*part
)
300 struct mtd_info
*mtd
;
305 sprintf(mtd_dev
, "%s%d", MTD_DEV_TYPE(id
->type
), id
->num
);
306 mtd
= get_mtd_device_nm(mtd_dev
);
308 printf("Partition %s not found on device %s!\n", part
->name
, mtd_dev
);
312 part
->sector_size
= mtd
->erasesize
;
314 if (!mtd
->numeraseregions
) {
316 * Only one eraseregion (NAND, OneNAND or uniform NOR),
317 * checking for alignment is easy here
319 if ((unsigned long)part
->offset
% mtd
->erasesize
) {
320 printf("%s%d: partition (%s) start offset"
321 "alignment incorrect\n",
322 MTD_DEV_TYPE(id
->type
), id
->num
, part
->name
);
326 if (part
->size
% mtd
->erasesize
) {
327 printf("%s%d: partition (%s) size alignment incorrect\n",
328 MTD_DEV_TYPE(id
->type
), id
->num
, part
->name
);
333 * Multiple eraseregions (non-uniform NOR),
334 * checking for alignment is more complex here
337 /* Check start alignment */
338 for (i
= 0; i
< mtd
->numeraseregions
; i
++) {
339 start
= mtd
->eraseregions
[i
].offset
;
340 for (j
= 0; j
< mtd
->eraseregions
[i
].numblocks
; j
++) {
341 if (part
->offset
== start
)
343 start
+= mtd
->eraseregions
[i
].erasesize
;
347 printf("%s%d: partition (%s) start offset alignment incorrect\n",
348 MTD_DEV_TYPE(id
->type
), id
->num
, part
->name
);
353 /* Check end/size alignment */
354 for (i
= 0; i
< mtd
->numeraseregions
; i
++) {
355 start
= mtd
->eraseregions
[i
].offset
;
356 for (j
= 0; j
< mtd
->eraseregions
[i
].numblocks
; j
++) {
357 if ((part
->offset
+ part
->size
) == start
)
359 start
+= mtd
->eraseregions
[i
].erasesize
;
362 /* Check last sector alignment */
363 if ((part
->offset
+ part
->size
) == start
)
366 printf("%s%d: partition (%s) size alignment incorrect\n",
367 MTD_DEV_TYPE(id
->type
), id
->num
, part
->name
);
379 * Performs sanity check for supplied partition. Offset and size are verified
380 * to be within valid range. Partition type is checked and either
381 * parts_validate_nor() or parts_validate_nand() is called with the argument
384 * @param id of the parent device
385 * @param part partition to validate
386 * @return 0 if partition is valid, 1 otherwise
388 static int part_validate(struct mtdids
*id
, struct part_info
*part
)
390 if (part
->size
== SIZE_REMAINING
)
391 part
->size
= id
->size
- part
->offset
;
393 if (part
->offset
> id
->size
) {
394 printf("%s: offset %08x beyond flash size %08x\n",
395 id
->mtd_id
, part
->offset
, id
->size
);
399 if ((part
->offset
+ part
->size
) <= part
->offset
) {
400 printf("%s%d: partition (%s) size too big\n",
401 MTD_DEV_TYPE(id
->type
), id
->num
, part
->name
);
405 if (part
->offset
+ part
->size
> id
->size
) {
406 printf("%s: partitioning exceeds flash size\n", id
->mtd_id
);
411 * Now we need to check if the partition starts and ends on
412 * sector (eraseblock) regions
414 return part_validate_eraseblock(id
, part
);
418 * Delete selected partition from the partion list of the specified device.
420 * @param dev device to delete partition from
421 * @param part partition to delete
422 * @return 0 on success, 1 otherwise
424 static int part_del(struct mtd_device
*dev
, struct part_info
*part
)
426 u8 current_save_needed
= 0;
428 /* if there is only one partition, remove whole device */
429 if (dev
->num_parts
== 1)
430 return device_del(dev
);
432 /* otherwise just delete this partition */
434 if (dev
== current_mtd_dev
) {
435 /* we are modyfing partitions for the current device,
437 struct part_info
*curr_pi
;
438 curr_pi
= mtd_part_info(current_mtd_dev
, current_mtd_partnum
);
441 if (curr_pi
== part
) {
442 printf("current partition deleted, resetting current to 0\n");
443 current_mtd_partnum
= 0;
444 } else if (part
->offset
<= curr_pi
->offset
) {
445 current_mtd_partnum
--;
447 current_save_needed
= 1;
451 list_del(&part
->link
);
455 if (current_save_needed
> 0)
464 * Delete all partitions from parts head list, free memory.
466 * @param head list of partitions to delete
468 static void part_delall(struct list_head
*head
)
470 struct list_head
*entry
, *n
;
471 struct part_info
*part_tmp
;
473 /* clean tmp_list and free allocated memory */
474 list_for_each_safe(entry
, n
, head
) {
475 part_tmp
= list_entry(entry
, struct part_info
, link
);
483 * Add new partition to the supplied partition list. Make sure partitions are
484 * sorted by offset in ascending order.
486 * @param head list this partition is to be added to
487 * @param new partition to be added
489 static int part_sort_add(struct mtd_device
*dev
, struct part_info
*part
)
491 struct list_head
*entry
;
492 struct part_info
*new_pi
, *curr_pi
;
494 /* link partition to parrent dev */
497 if (list_empty(&dev
->parts
)) {
498 debug("part_sort_add: list empty\n");
499 list_add(&part
->link
, &dev
->parts
);
505 new_pi
= list_entry(&part
->link
, struct part_info
, link
);
507 /* get current partition info if we are updating current device */
509 if (dev
== current_mtd_dev
)
510 curr_pi
= mtd_part_info(current_mtd_dev
, current_mtd_partnum
);
512 list_for_each(entry
, &dev
->parts
) {
513 struct part_info
*pi
;
515 pi
= list_entry(entry
, struct part_info
, link
);
517 /* be compliant with kernel cmdline, allow only one partition at offset zero */
518 if ((new_pi
->offset
== pi
->offset
) && (pi
->offset
== 0)) {
519 printf("cannot add second partition at offset 0\n");
523 if (new_pi
->offset
<= pi
->offset
) {
524 list_add_tail(&part
->link
, entry
);
527 if (curr_pi
&& (pi
->offset
<= curr_pi
->offset
)) {
528 /* we are modyfing partitions for the current
529 * device, update current */
530 current_mtd_partnum
++;
539 list_add_tail(&part
->link
, &dev
->parts
);
546 * Add provided partition to the partition list of a given device.
548 * @param dev device to which partition is added
549 * @param part partition to be added
550 * @return 0 on success, 1 otherwise
552 static int part_add(struct mtd_device
*dev
, struct part_info
*part
)
554 /* verify alignment and size */
555 if (part_validate(dev
->id
, part
) != 0)
558 /* partition is ok, add it to the list */
559 if (part_sort_add(dev
, part
) != 0)
566 * Parse one partition definition, allocate memory and return pointer to this
567 * location in retpart.
569 * @param partdef pointer to the partition definition string i.e. <part-def>
570 * @param ret output pointer to next char after parse completes (output)
571 * @param retpart pointer to the allocated partition (output)
572 * @return 0 on success, 1 otherwise
574 static int part_parse(const char *const partdef
, const char **ret
, struct part_info
**retpart
)
576 struct part_info
*part
;
578 unsigned long offset
;
581 unsigned int mask_flags
;
588 /* fetch the partition size */
590 /* assign all remaining space to this partition */
591 debug("'-': remaining size assigned\n");
592 size
= SIZE_REMAINING
;
595 size
= memsize_parse(p
, &p
);
596 if (size
< MIN_PART_SIZE
) {
597 printf("partition size too small (%lx)\n", size
);
602 /* check for offset */
603 offset
= OFFSET_NOT_SPECIFIED
;
606 offset
= memsize_parse(p
, &p
);
609 /* now look for the name */
612 if ((p
= strchr(name
, ')')) == NULL
) {
613 printf("no closing ) found in partition name\n");
616 name_len
= p
- name
+ 1;
617 if ((name_len
- 1) == 0) {
618 printf("empty partition name\n");
623 /* 0x00000000@0x00000000 */
628 /* test for options */
630 if (strncmp(p
, "ro", 2) == 0) {
631 mask_flags
|= MTD_WRITEABLE_CMD
;
635 /* check for next partition definition */
637 if (size
== SIZE_REMAINING
) {
639 printf("no partitions allowed after a fill-up partition\n");
643 } else if ((*p
== ';') || (*p
== '\0')) {
646 printf("unexpected character '%c' at the end of partition\n", *p
);
651 /* allocate memory */
652 part
= (struct part_info
*)malloc(sizeof(struct part_info
) + name_len
);
654 printf("out of memory\n");
657 memset(part
, 0, sizeof(struct part_info
) + name_len
);
659 part
->offset
= offset
;
660 part
->mask_flags
= mask_flags
;
661 part
->name
= (char *)(part
+ 1);
664 /* copy user provided name */
665 strncpy(part
->name
, name
, name_len
- 1);
668 /* auto generated name in form of size@offset */
669 sprintf(part
->name
, "0x%08lx@0x%08lx", size
, offset
);
673 part
->name
[name_len
- 1] = '\0';
674 INIT_LIST_HEAD(&part
->link
);
676 debug("+ partition: name %-22s size 0x%08x offset 0x%08x mask flags %d\n",
677 part
->name
, part
->size
,
678 part
->offset
, part
->mask_flags
);
685 * Check device number to be within valid range for given device type.
687 * @param dev device to validate
688 * @return 0 if device is valid, 1 otherwise
690 int mtd_device_validate(u8 type
, u8 num
, u32
*size
)
692 struct mtd_info
*mtd
;
695 sprintf(mtd_dev
, "%s%d", MTD_DEV_TYPE(type
), num
);
696 mtd
= get_mtd_device_nm(mtd_dev
);
698 printf("Device %s not found!\n", mtd_dev
);
708 * Delete all mtd devices from a supplied devices list, free memory allocated for
709 * each device and delete all device partitions.
711 * @return 0 on success, 1 otherwise
713 static int device_delall(struct list_head
*head
)
715 struct list_head
*entry
, *n
;
716 struct mtd_device
*dev_tmp
;
718 /* clean devices list */
719 list_for_each_safe(entry
, n
, head
) {
720 dev_tmp
= list_entry(entry
, struct mtd_device
, link
);
722 part_delall(&dev_tmp
->parts
);
725 INIT_LIST_HEAD(&devices
);
731 * If provided device exists it's partitions are deleted, device is removed
732 * from device list and device memory is freed.
734 * @param dev device to be deleted
735 * @return 0 on success, 1 otherwise
737 static int device_del(struct mtd_device
*dev
)
739 part_delall(&dev
->parts
);
740 list_del(&dev
->link
);
743 if (dev
== current_mtd_dev
) {
744 /* we just deleted current device */
745 if (list_empty(&devices
)) {
746 current_mtd_dev
= NULL
;
748 /* reset first partition from first dev from the
749 * devices list as current */
750 current_mtd_dev
= list_entry(devices
.next
, struct mtd_device
, link
);
751 current_mtd_partnum
= 0;
762 * Search global device list and return pointer to the device of type and num
765 * @param type device type
766 * @param num device number
767 * @return NULL if requested device does not exist
769 struct mtd_device
*device_find(u8 type
, u8 num
)
771 struct list_head
*entry
;
772 struct mtd_device
*dev_tmp
;
774 list_for_each(entry
, &devices
) {
775 dev_tmp
= list_entry(entry
, struct mtd_device
, link
);
777 if ((dev_tmp
->id
->type
== type
) && (dev_tmp
->id
->num
== num
))
785 * Add specified device to the global device list.
787 * @param dev device to be added
789 static void device_add(struct mtd_device
*dev
)
791 u8 current_save_needed
= 0;
793 if (list_empty(&devices
)) {
794 current_mtd_dev
= dev
;
795 current_mtd_partnum
= 0;
796 current_save_needed
= 1;
799 list_add_tail(&dev
->link
, &devices
);
801 if (current_save_needed
> 0)
808 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
809 * return pointer to the device structure.
811 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
812 * @param ret output pointer to next char after parse completes (output)
813 * @param retdev pointer to the allocated device (output)
814 * @return 0 on success, 1 otherwise
816 static int device_parse(const char *const mtd_dev
, const char **ret
, struct mtd_device
**retdev
)
818 struct mtd_device
*dev
;
819 struct part_info
*part
;
822 unsigned int mtd_id_len
;
823 const char *p
, *pend
;
825 struct list_head
*entry
, *n
;
830 debug("===device_parse===\n");
839 mtd_id
= p
= mtd_dev
;
840 if (!(p
= strchr(mtd_id
, ':'))) {
841 printf("no <mtd-id> identifier\n");
844 mtd_id_len
= p
- mtd_id
+ 1;
847 /* verify if we have a valid device specified */
848 if ((id
= id_find_by_mtd_id(mtd_id
, mtd_id_len
- 1)) == NULL
) {
849 printf("invalid mtd device '%.*s'\n", mtd_id_len
- 1, mtd_id
);
853 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
854 id
->type
, MTD_DEV_TYPE(id
->type
),
855 id
->num
, id
->mtd_id
);
856 pend
= strchr(p
, ';');
857 debug("parsing partitions %.*s\n", (pend
? pend
- p
: strlen(p
)), p
);
860 /* parse partitions */
864 if ((dev
= device_find(id
->type
, id
->num
)) != NULL
) {
865 /* if device already exists start at the end of the last partition */
866 part
= list_entry(dev
->parts
.prev
, struct part_info
, link
);
867 offset
= part
->offset
+ part
->size
;
870 while (p
&& (*p
!= '\0') && (*p
!= ';')) {
872 if ((part_parse(p
, &p
, &part
) != 0) || (!part
))
875 /* calculate offset when not specified */
876 if (part
->offset
== OFFSET_NOT_SPECIFIED
)
877 part
->offset
= offset
;
879 offset
= part
->offset
;
881 /* verify alignment and size */
882 if (part_validate(id
, part
) != 0)
885 offset
+= part
->size
;
887 /* partition is ok, add it to the list */
888 list_add_tail(&part
->link
, &tmp_list
);
893 part_delall(&tmp_list
);
897 if (num_parts
== 0) {
898 printf("no partitions for device %s%d (%s)\n",
899 MTD_DEV_TYPE(id
->type
), id
->num
, id
->mtd_id
);
903 debug("\ntotal partitions: %d\n", num_parts
);
905 /* check for next device presence */
910 } else if (*p
== '\0') {
914 printf("unexpected character '%c' at the end of device\n", *p
);
921 /* allocate memory for mtd_device structure */
922 if ((dev
= (struct mtd_device
*)malloc(sizeof(struct mtd_device
))) == NULL
) {
923 printf("out of memory\n");
926 memset(dev
, 0, sizeof(struct mtd_device
));
928 dev
->num_parts
= 0; /* part_sort_add increments num_parts */
929 INIT_LIST_HEAD(&dev
->parts
);
930 INIT_LIST_HEAD(&dev
->link
);
932 /* move partitions from tmp_list to dev->parts */
933 list_for_each_safe(entry
, n
, &tmp_list
) {
934 part
= list_entry(entry
, struct part_info
, link
);
936 if (part_sort_add(dev
, part
) != 0) {
949 * Initialize global device list.
951 * @return 0 on success, 1 otherwise
953 static int mtd_devices_init(void)
955 last_parts
[0] = '\0';
956 current_mtd_dev
= NULL
;
959 return device_delall(&devices
);
963 * Search global mtdids list and find id of requested type and number.
965 * @return pointer to the id if it exists, NULL otherwise
967 static struct mtdids
* id_find(u8 type
, u8 num
)
969 struct list_head
*entry
;
972 list_for_each(entry
, &mtdids
) {
973 id
= list_entry(entry
, struct mtdids
, link
);
975 if ((id
->type
== type
) && (id
->num
== num
))
983 * Search global mtdids list and find id of a requested mtd_id.
985 * Note: first argument is not null terminated.
987 * @param mtd_id string containing requested mtd_id
988 * @param mtd_id_len length of supplied mtd_id
989 * @return pointer to the id if it exists, NULL otherwise
991 static struct mtdids
* id_find_by_mtd_id(const char *mtd_id
, unsigned int mtd_id_len
)
993 struct list_head
*entry
;
996 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
997 mtd_id_len
, mtd_id
, mtd_id_len
);
999 list_for_each(entry
, &mtdids
) {
1000 id
= list_entry(entry
, struct mtdids
, link
);
1002 debug("entry: '%s' (len = %d)\n",
1003 id
->mtd_id
, strlen(id
->mtd_id
));
1005 if (mtd_id_len
!= strlen(id
->mtd_id
))
1007 if (strncmp(id
->mtd_id
, mtd_id
, mtd_id_len
) == 0)
1015 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
1016 * return device type and number.
1018 * @param id string describing device id
1019 * @param ret_id output pointer to next char after parse completes (output)
1020 * @param dev_type parsed device type (output)
1021 * @param dev_num parsed device number (output)
1022 * @return 0 on success, 1 otherwise
1024 int mtd_id_parse(const char *id
, const char **ret_id
, u8
*dev_type
, u8
*dev_num
)
1029 if (strncmp(p
, "nand", 4) == 0) {
1030 *dev_type
= MTD_DEV_TYPE_NAND
;
1032 } else if (strncmp(p
, "nor", 3) == 0) {
1033 *dev_type
= MTD_DEV_TYPE_NOR
;
1035 } else if (strncmp(p
, "onenand", 7) == 0) {
1036 *dev_type
= MTD_DEV_TYPE_ONENAND
;
1039 printf("incorrect device type in %s\n", id
);
1044 printf("incorrect device number in %s\n", id
);
1048 *dev_num
= simple_strtoul(p
, (char **)&p
, 0);
1055 * Process all devices and generate corresponding mtdparts string describing
1056 * all partitions on all devices.
1058 * @param buf output buffer holding generated mtdparts string (output)
1059 * @param buflen buffer size
1060 * @return 0 on success, 1 otherwise
1062 static int generate_mtdparts(char *buf
, u32 buflen
)
1064 struct list_head
*pentry
, *dentry
;
1065 struct mtd_device
*dev
;
1066 struct part_info
*part
, *prev_part
;
1069 u32 size
, offset
, len
, part_cnt
;
1070 u32 maxlen
= buflen
- 1;
1072 debug("--- generate_mtdparts ---\n");
1074 if (list_empty(&devices
)) {
1079 sprintf(p
, "mtdparts=");
1082 list_for_each(dentry
, &devices
) {
1083 dev
= list_entry(dentry
, struct mtd_device
, link
);
1086 len
= strlen(dev
->id
->mtd_id
) + 1;
1089 memcpy(p
, dev
->id
->mtd_id
, len
- 1);
1094 /* format partitions */
1097 list_for_each(pentry
, &dev
->parts
) {
1098 part
= list_entry(pentry
, struct part_info
, link
);
1100 offset
= part
->offset
;
1103 /* partition size */
1104 memsize_format(tmpbuf
, size
);
1105 len
= strlen(tmpbuf
);
1108 memcpy(p
, tmpbuf
, len
);
1113 /* add offset only when there is a gap between
1115 if ((!prev_part
&& (offset
!= 0)) ||
1116 (prev_part
&& ((prev_part
->offset
+ prev_part
->size
) != part
->offset
))) {
1118 memsize_format(tmpbuf
, offset
);
1119 len
= strlen(tmpbuf
) + 1;
1123 memcpy(p
, tmpbuf
, len
- 1);
1128 /* copy name only if user supplied */
1129 if(!part
->auto_name
) {
1130 len
= strlen(part
->name
) + 2;
1135 memcpy(p
, part
->name
, len
- 2);
1142 if (part
->mask_flags
&& MTD_WRITEABLE_CMD
) {
1151 /* print ',' separator if there are other partitions
1153 if (dev
->num_parts
> part_cnt
) {
1161 /* print ';' separator if there are other devices following */
1162 if (dentry
->next
!= &devices
) {
1170 /* we still have at least one char left, as we decremented maxlen at
1177 last_parts
[0] = '\0';
1182 * Call generate_mtdparts to process all devices and generate corresponding
1183 * mtdparts string, save it in mtdparts environment variable.
1185 * @param buf output buffer holding generated mtdparts string (output)
1186 * @param buflen buffer size
1187 * @return 0 on success, 1 otherwise
1189 static int generate_mtdparts_save(char *buf
, u32 buflen
)
1193 ret
= generate_mtdparts(buf
, buflen
);
1195 if ((buf
[0] != '\0') && (ret
== 0))
1196 setenv("mtdparts", buf
);
1198 setenv("mtdparts", NULL
);
1204 * Format and print out a partition list for each device from global device
1207 static void list_partitions(void)
1209 struct list_head
*dentry
, *pentry
;
1210 struct part_info
*part
;
1211 struct mtd_device
*dev
;
1214 debug("\n---list_partitions---\n");
1215 list_for_each(dentry
, &devices
) {
1216 dev
= list_entry(dentry
, struct mtd_device
, link
);
1217 printf("\ndevice %s%d <%s>, # parts = %d\n",
1218 MTD_DEV_TYPE(dev
->id
->type
), dev
->id
->num
,
1219 dev
->id
->mtd_id
, dev
->num_parts
);
1220 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1222 /* list partitions for given device */
1224 list_for_each(pentry
, &dev
->parts
) {
1225 part
= list_entry(pentry
, struct part_info
, link
);
1226 printf("%2d: %-20s0x%08x\t0x%08x\t%d\n",
1227 part_num
, part
->name
, part
->size
,
1228 part
->offset
, part
->mask_flags
);
1233 if (list_empty(&devices
))
1234 printf("no partitions defined\n");
1236 /* current_mtd_dev is not NULL only when we have non empty device list */
1237 if (current_mtd_dev
) {
1238 part
= mtd_part_info(current_mtd_dev
, current_mtd_partnum
);
1240 printf("\nactive partition: %s%d,%d - (%s) 0x%08x @ 0x%08x\n",
1241 MTD_DEV_TYPE(current_mtd_dev
->id
->type
),
1242 current_mtd_dev
->id
->num
, current_mtd_partnum
,
1243 part
->name
, part
->size
, part
->offset
);
1245 printf("could not get current partition info\n\n");
1249 printf("\ndefaults:\n");
1250 printf("mtdids : %s\n",
1251 mtdids_default
? mtdids_default
: "none");
1253 * Using printf() here results in printbuffer overflow
1254 * if default mtdparts string is greater than console
1255 * printbuffer. Use puts() to prevent system crashes.
1258 puts(mtdparts_default
? mtdparts_default
: "none");
1263 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1264 * corresponding device and verify partition number.
1266 * @param id string describing device and partition or partition name
1267 * @param dev pointer to the requested device (output)
1268 * @param part_num verified partition number (output)
1269 * @param part pointer to requested partition (output)
1270 * @return 0 on success, 1 otherwise
1272 int find_dev_and_part(const char *id
, struct mtd_device
**dev
,
1273 u8
*part_num
, struct part_info
**part
)
1275 struct list_head
*dentry
, *pentry
;
1276 u8 type
, dnum
, pnum
;
1279 debug("--- find_dev_and_part ---\nid = %s\n", id
);
1281 list_for_each(dentry
, &devices
) {
1283 *dev
= list_entry(dentry
, struct mtd_device
, link
);
1284 list_for_each(pentry
, &(*dev
)->parts
) {
1285 *part
= list_entry(pentry
, struct part_info
, link
);
1286 if (strcmp((*part
)->name
, id
) == 0)
1297 if (mtd_id_parse(p
, &p
, &type
, &dnum
) != 0)
1300 if ((*p
++ != ',') || (*p
== '\0')) {
1301 printf("no partition number specified\n");
1304 pnum
= simple_strtoul(p
, (char **)&p
, 0);
1306 printf("unexpected trailing character '%c'\n", *p
);
1310 if ((*dev
= device_find(type
, dnum
)) == NULL
) {
1311 printf("no such device %s%d\n", MTD_DEV_TYPE(type
), dnum
);
1315 if ((*part
= mtd_part_info(*dev
, pnum
)) == NULL
) {
1316 printf("no such partition\n");
1327 * Find and delete partition. For partition id format see find_dev_and_part().
1329 * @param id string describing device and partition
1330 * @return 0 on success, 1 otherwise
1332 static int delete_partition(const char *id
)
1335 struct mtd_device
*dev
;
1336 struct part_info
*part
;
1338 if (find_dev_and_part(id
, &dev
, &pnum
, &part
) == 0) {
1340 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08x@0x%08x\n",
1341 MTD_DEV_TYPE(dev
->id
->type
), dev
->id
->num
, pnum
,
1342 part
->name
, part
->size
, part
->offset
);
1344 if (part_del(dev
, part
) != 0)
1347 if (generate_mtdparts_save(last_parts
, MTDPARTS_MAXLEN
) != 0) {
1348 printf("generated mtdparts too long, reseting to null\n");
1354 printf("partition %s not found\n", id
);
1359 * Accept character string describing mtd partitions and call device_parse()
1360 * for each entry. Add created devices to the global devices list.
1362 * @param mtdparts string specifing mtd partitions
1363 * @return 0 on success, 1 otherwise
1365 static int parse_mtdparts(const char *const mtdparts
)
1367 const char *p
= mtdparts
;
1368 struct mtd_device
*dev
;
1371 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", p
);
1373 /* delete all devices and partitions */
1374 if (mtd_devices_init() != 0) {
1375 printf("could not initialise device list\n");
1379 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1380 p
= getenv("mtdparts");
1382 if (strncmp(p
, "mtdparts=", 9) != 0) {
1383 printf("mtdparts variable doesn't start with 'mtdparts='\n");
1388 while (p
&& (*p
!= '\0')) {
1390 if ((device_parse(p
, &p
, &dev
) != 0) || (!dev
))
1393 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev
->id
->type
),
1394 dev
->id
->num
, dev
->id
->mtd_id
);
1396 /* check if parsed device is already on the list */
1397 if (device_find(dev
->id
->type
, dev
->id
->num
) != NULL
) {
1398 printf("device %s%d redefined, please correct mtdparts variable\n",
1399 MTD_DEV_TYPE(dev
->id
->type
), dev
->id
->num
);
1403 list_add_tail(&dev
->link
, &devices
);
1407 device_delall(&devices
);
1415 * Parse provided string describing mtdids mapping (see file header for mtdids
1416 * variable format). Allocate memory for each entry and add all found entries
1417 * to the global mtdids list.
1419 * @param ids mapping string
1420 * @return 0 on success, 1 otherwise
1422 static int parse_mtdids(const char *const ids
)
1424 const char *p
= ids
;
1428 struct list_head
*entry
, *n
;
1429 struct mtdids
*id_tmp
;
1434 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids
);
1436 /* clean global mtdids list */
1437 list_for_each_safe(entry
, n
, &mtdids
) {
1438 id_tmp
= list_entry(entry
, struct mtdids
, link
);
1439 debug("mtdids del: %d %d\n", id_tmp
->type
, id_tmp
->num
);
1444 INIT_LIST_HEAD(&mtdids
);
1446 while(p
&& (*p
!= '\0')) {
1449 /* parse 'nor'|'nand'|'onenand'<dev-num> */
1450 if (mtd_id_parse(p
, &p
, &type
, &num
) != 0)
1454 printf("mtdids: incorrect <dev-num>\n");
1459 /* check if requested device exists */
1460 if (mtd_device_validate(type
, num
, &size
) != 0)
1463 /* locate <mtd-id> */
1465 if ((p
= strchr(mtd_id
, ',')) != NULL
) {
1466 mtd_id_len
= p
- mtd_id
+ 1;
1469 mtd_id_len
= strlen(mtd_id
) + 1;
1471 if (mtd_id_len
== 0) {
1472 printf("mtdids: no <mtd-id> identifier\n");
1476 /* check if this id is already on the list */
1477 int double_entry
= 0;
1478 list_for_each(entry
, &mtdids
) {
1479 id_tmp
= list_entry(entry
, struct mtdids
, link
);
1480 if ((id_tmp
->type
== type
) && (id_tmp
->num
== num
)) {
1486 printf("device id %s%d redefined, please correct mtdids variable\n",
1487 MTD_DEV_TYPE(type
), num
);
1491 /* allocate mtdids structure */
1492 if (!(id
= (struct mtdids
*)malloc(sizeof(struct mtdids
) + mtd_id_len
))) {
1493 printf("out of memory\n");
1496 memset(id
, 0, sizeof(struct mtdids
) + mtd_id_len
);
1500 id
->mtd_id
= (char *)(id
+ 1);
1501 strncpy(id
->mtd_id
, mtd_id
, mtd_id_len
- 1);
1502 id
->mtd_id
[mtd_id_len
- 1] = '\0';
1503 INIT_LIST_HEAD(&id
->link
);
1505 debug("+ id %s%d\t%16d bytes\t%s\n",
1506 MTD_DEV_TYPE(id
->type
), id
->num
,
1507 id
->size
, id
->mtd_id
);
1509 list_add_tail(&id
->link
, &mtdids
);
1513 /* clean mtdids list and free allocated memory */
1514 list_for_each_safe(entry
, n
, &mtdids
) {
1515 id_tmp
= list_entry(entry
, struct mtdids
, link
);
1526 * Parse and initialize global mtdids mapping and create global
1527 * device/partition list.
1529 * @return 0 on success, 1 otherwise
1531 int mtdparts_init(void)
1533 static int initialized
= 0;
1534 const char *ids
, *parts
;
1535 const char *current_partition
;
1537 char tmp_ep
[PARTITION_MAXLEN
];
1539 debug("\n---mtdparts_init---\n");
1541 INIT_LIST_HEAD(&mtdids
);
1542 INIT_LIST_HEAD(&devices
);
1543 memset(last_ids
, 0, MTDIDS_MAXLEN
);
1544 memset(last_parts
, 0, MTDPARTS_MAXLEN
);
1545 memset(last_partition
, 0, PARTITION_MAXLEN
);
1550 ids
= getenv("mtdids");
1551 parts
= getenv("mtdparts");
1552 current_partition
= getenv("partition");
1554 /* save it for later parsing, cannot rely on current partition pointer
1555 * as 'partition' variable may be updated during init */
1557 if (current_partition
)
1558 strncpy(tmp_ep
, current_partition
, PARTITION_MAXLEN
);
1560 debug("last_ids : %s\n", last_ids
);
1561 debug("env_ids : %s\n", ids
);
1562 debug("last_parts: %s\n", last_parts
);
1563 debug("env_parts : %s\n\n", parts
);
1565 debug("last_partition : %s\n", last_partition
);
1566 debug("env_partition : %s\n", current_partition
);
1568 /* if mtdids varible is empty try to use defaults */
1570 if (mtdids_default
) {
1571 debug("mtdids variable not defined, using default\n");
1572 ids
= mtdids_default
;
1573 setenv("mtdids", (char *)ids
);
1575 printf("mtdids not defined, no default present\n");
1579 if (strlen(ids
) > MTDIDS_MAXLEN
- 1) {
1580 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN
);
1584 /* do no try to use defaults when mtdparts variable is not defined,
1585 * just check the length */
1587 printf("mtdparts variable not set, see 'help mtdparts'\n");
1589 if (parts
&& (strlen(parts
) > MTDPARTS_MAXLEN
- 1)) {
1590 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN
);
1594 /* check if we have already parsed those mtdids */
1595 if ((last_ids
[0] != '\0') && (strcmp(last_ids
, ids
) == 0)) {
1600 if (parse_mtdids(ids
) != 0) {
1605 /* ok it's good, save new ids */
1606 strncpy(last_ids
, ids
, MTDIDS_MAXLEN
);
1609 /* parse partitions if either mtdparts or mtdids were updated */
1610 if (parts
&& ((last_parts
[0] == '\0') || ((strcmp(last_parts
, parts
) != 0)) || ids_changed
)) {
1611 if (parse_mtdparts(parts
) != 0)
1614 if (list_empty(&devices
)) {
1615 printf("mtdparts_init: no valid partitions\n");
1619 /* ok it's good, save new parts */
1620 strncpy(last_parts
, parts
, MTDPARTS_MAXLEN
);
1622 /* reset first partition from first dev from the list as current */
1623 current_mtd_dev
= list_entry(devices
.next
, struct mtd_device
, link
);
1624 current_mtd_partnum
= 0;
1627 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1628 MTD_DEV_TYPE(current_mtd_dev
->id
->type
),
1629 current_mtd_dev
->id
->num
, current_mtd_partnum
);
1632 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1633 if (!parts
&& (last_parts
[0] != '\0'))
1634 return mtd_devices_init();
1636 /* do not process current partition if mtdparts variable is null */
1640 /* is current partition set in environment? if so, use it */
1641 if ((tmp_ep
[0] != '\0') && (strcmp(tmp_ep
, last_partition
) != 0)) {
1642 struct part_info
*p
;
1643 struct mtd_device
*cdev
;
1646 debug("--- getting current partition: %s\n", tmp_ep
);
1648 if (find_dev_and_part(tmp_ep
, &cdev
, &pnum
, &p
) == 0) {
1649 current_mtd_dev
= cdev
;
1650 current_mtd_partnum
= pnum
;
1653 } else if (getenv("partition") == NULL
) {
1654 debug("no partition variable set, setting...\n");
1662 * Return pointer to the partition of a requested number from a requested
1665 * @param dev device that is to be searched for a partition
1666 * @param part_num requested partition number
1667 * @return pointer to the part_info, NULL otherwise
1669 static struct part_info
* mtd_part_info(struct mtd_device
*dev
, unsigned int part_num
)
1671 struct list_head
*entry
;
1672 struct part_info
*part
;
1678 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1679 part_num
, MTD_DEV_TYPE(dev
->id
->type
),
1680 dev
->id
->num
, dev
->id
->mtd_id
);
1682 if (part_num
>= dev
->num_parts
) {
1683 printf("invalid partition number %d for device %s%d (%s)\n",
1684 part_num
, MTD_DEV_TYPE(dev
->id
->type
),
1685 dev
->id
->num
, dev
->id
->mtd_id
);
1689 /* locate partition number, return it */
1691 list_for_each(entry
, &dev
->parts
) {
1692 part
= list_entry(entry
, struct part_info
, link
);
1694 if (part_num
== num
++) {
1702 /***************************************************/
1703 /* U-boot commands */
1704 /***************************************************/
1705 /* command line only */
1707 * Routine implementing u-boot chpart command. Sets new current partition based
1708 * on the user supplied partition id. For partition id format see find_dev_and_part().
1710 * @param cmdtp command internal data
1711 * @param flag command flag
1712 * @param argc number of arguments supplied to the command
1713 * @param argv arguments list
1714 * @return 0 on success, 1 otherwise
1716 int do_chpart(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1718 /* command line only */
1719 struct mtd_device
*dev
;
1720 struct part_info
*part
;
1723 if (mtdparts_init() !=0)
1727 printf("no partition id specified\n");
1731 if (find_dev_and_part(argv
[1], &dev
, &pnum
, &part
) != 0)
1734 current_mtd_dev
= dev
;
1735 current_mtd_partnum
= pnum
;
1738 printf("partition changed to %s%d,%d\n",
1739 MTD_DEV_TYPE(dev
->id
->type
), dev
->id
->num
, pnum
);
1745 * Routine implementing u-boot mtdparts command. Initialize/update default global
1746 * partition list and process user partition request (list, add, del).
1748 * @param cmdtp command internal data
1749 * @param flag command flag
1750 * @param argc number of arguments supplied to the command
1751 * @param argv arguments list
1752 * @return 0 on success, 1 otherwise
1754 int do_mtdparts(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
1757 if (strcmp(argv
[1], "default") == 0) {
1758 setenv("mtdids", (char *)mtdids_default
);
1759 setenv("mtdparts", (char *)mtdparts_default
);
1760 setenv("partition", NULL
);
1764 } else if (strcmp(argv
[1], "delall") == 0) {
1765 /* this may be the first run, initialize lists if needed */
1768 setenv("mtdparts", NULL
);
1770 /* mtd_devices_init() calls current_save() */
1771 return mtd_devices_init();
1775 /* make sure we are in sync with env variables */
1776 if (mtdparts_init() != 0)
1784 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1785 if (((argc
== 5) || (argc
== 6)) && (strcmp(argv
[1], "add") == 0)) {
1786 #define PART_ADD_DESC_MAXLEN 64
1787 char tmpbuf
[PART_ADD_DESC_MAXLEN
];
1789 struct mtd_device
*dev
;
1790 struct mtd_device
*dev_tmp
;
1792 struct part_info
*p
;
1794 if (mtd_id_parse(argv
[2], NULL
, &type
, &num
) != 0)
1797 if ((id
= id_find(type
, num
)) == NULL
) {
1798 printf("no such device %s defined in mtdids variable\n", argv
[2]);
1802 len
= strlen(id
->mtd_id
) + 1; /* 'mtd_id:' */
1803 len
+= strlen(argv
[3]); /* size@offset */
1804 len
+= strlen(argv
[4]) + 2; /* '(' name ')' */
1805 if (argv
[5] && (strlen(argv
[5]) == 2))
1806 len
+= 2; /* 'ro' */
1808 if (len
>= PART_ADD_DESC_MAXLEN
) {
1809 printf("too long partition description\n");
1812 sprintf(tmpbuf
, "%s:%s(%s)%s",
1813 id
->mtd_id
, argv
[3], argv
[4], argv
[5] ? argv
[5] : "");
1814 debug("add tmpbuf: %s\n", tmpbuf
);
1816 if ((device_parse(tmpbuf
, NULL
, &dev
) != 0) || (!dev
))
1819 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev
->id
->type
),
1820 dev
->id
->num
, dev
->id
->mtd_id
);
1822 if ((dev_tmp
= device_find(dev
->id
->type
, dev
->id
->num
)) == NULL
) {
1825 /* merge new partition with existing ones*/
1826 p
= list_entry(dev
->parts
.next
, struct part_info
, link
);
1827 if (part_add(dev_tmp
, p
) != 0) {
1833 if (generate_mtdparts_save(last_parts
, MTDPARTS_MAXLEN
) != 0) {
1834 printf("generated mtdparts too long, reseting to null\n");
1841 /* mtdparts del part-id */
1842 if ((argc
== 3) && (strcmp(argv
[1], "del") == 0)) {
1843 debug("del: part-id = %s\n", argv
[2]);
1845 return delete_partition(argv
[2]);
1852 /***************************************************/
1854 chpart
, 2, 0, do_chpart
,
1855 "change active partition",
1857 " - change active partition (e.g. part-id = nand0,1)"
1861 mtdparts
, 6, 0, do_mtdparts
,
1862 "define flash/nand partitions",
1864 " - list partition table\n"
1866 " - delete all partitions\n"
1867 "mtdparts del part-id\n"
1868 " - delete partition (e.g. part-id = nand0,1)\n"
1869 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
1870 " - add partition\n"
1871 "mtdparts default\n"
1872 " - reset partition table to defaults\n\n"
1874 "this command uses three environment variables:\n\n"
1875 "'partition' - keeps current partition identifier\n\n"
1876 "partition := <part-id>\n"
1877 "<part-id> := <dev-id>,part_num\n\n"
1878 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
1879 "mtdids=<idmap>[,<idmap>,...]\n\n"
1880 "<idmap> := <dev-id>=<mtd-id>\n"
1881 "<dev-id> := 'nand'|'nor'|'onenand'<dev-num>\n"
1882 "<dev-num> := mtd device number, 0...\n"
1883 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
1884 "'mtdparts' - partition list\n\n"
1885 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
1886 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
1887 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
1888 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
1889 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
1890 "<offset> := partition start offset within the device\n"
1891 "<name> := '(' NAME ')'\n"
1892 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)"
1894 /***************************************************/