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
19 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
21 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
22 * Copyright 2002 SYSGO Real-Time Solutions GmbH
24 * SPDX-License-Identifier: GPL-2.0+
28 * Three environment variables are used by the parsing routines:
30 * 'partition' - keeps current partition identifier
32 * partition := <part-id>
33 * <part-id> := <dev-id>,part_num
36 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
38 * mtdids=<idmap>[,<idmap>,...]
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)
46 * 'mtdparts' - partition list
48 * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
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)
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
64 * 1 NOR Flash, with 1 single writable partition:
65 * mtdids=nor0=edb7312-nor
66 * mtdparts=mtdparts=edb7312-nor:-
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)
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>
83 #if defined(CONFIG_CMD_NAND)
84 #include <linux/mtd/nand.h>
88 #if defined(CONFIG_CMD_ONENAND)
89 #include <linux/mtd/onenand.h>
90 #include <onenand_uboot.h>
93 DECLARE_GLOBAL_DATA_PTR;
95 /* special size referring to all the remaining space in a partition */
96 #define SIZE_REMAINING 0xFFFFFFFF
98 /* special offset value, it is used when not provided by user
100 * this value is used temporarily during parsing, later such offests
101 * are recalculated */
102 #define OFFSET_NOT_SPECIFIED 0xFFFFFFFF
104 /* minimum partition size */
105 #define MIN_PART_SIZE 4096
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
111 /* default values for mtdids and mtdparts variables */
112 #if defined(MTDIDS_DEFAULT)
113 static const char *const mtdids_default = MTDIDS_DEFAULT;
115 static const char *const mtdids_default = NULL;
118 #if defined(MTDPARTS_DEFAULT)
119 static const char *const mtdparts_default = MTDPARTS_DEFAULT;
121 static const char *const mtdparts_default = NULL;
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];
132 /* low level jffs2 cache cleaning routine */
133 extern void jffs2_free_cache(struct part_info *part);
135 /* mtdids mapping list, filled by parse_ids() */
136 static struct list_head mtdids;
138 /* device/partition list, parse_cmdline() parses into here */
139 static struct list_head devices;
141 /* current active device and partition number */
142 struct mtd_device *current_mtd_dev = NULL;
143 u8 current_mtd_partnum = 0;
145 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
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);
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.
159 * @param ptr where parse begins
160 * @param retptr output pointer to next char after parse completes (output)
161 * @return resulting unsigned int
163 static unsigned long memsize_parse (const char *const ptr, const char **retptr)
165 unsigned long ret = simple_strtoul(ptr, (char **)retptr, 0);
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.
190 * Note, that this routine does not check for buffer overflow, it's the caller
191 * who must assure enough space.
193 * @param buf output buffer
194 * @param size size to be converted to string
196 static void memsize_format(char *buf, u32 size)
198 #define SIZE_GB ((u32)1024*1024*1024)
199 #define SIZE_MB ((u32)1024*1024)
200 #define SIZE_KB ((u32)1024)
202 if ((size % SIZE_GB) == 0)
203 sprintf(buf, "%ug", size/SIZE_GB);
204 else if ((size % SIZE_MB) == 0)
205 sprintf(buf, "%um", size/SIZE_MB);
206 else if (size % SIZE_KB == 0)
207 sprintf(buf, "%uk", size/SIZE_KB);
209 sprintf(buf, "%u", size);
213 * This routine does global indexing of all partitions. Resulting index for
214 * current partition is saved in 'mtddevnum'. Current partition name in
217 static void index_partitions(void)
220 struct part_info *part;
221 struct list_head *dentry;
222 struct mtd_device *dev;
224 debug("--- index partitions ---\n");
226 if (current_mtd_dev) {
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);
235 mtddevnum += dev->num_parts;
238 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
239 setenv("mtddevname", part->name);
241 debug("=> mtddevnum %d,\n=> mtddevname %s\n", mtddevnum, part->name);
243 setenv("mtddevnum", NULL);
244 setenv("mtddevname", NULL);
246 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
251 * Save current device and partition in environment variable 'partition'.
253 static void current_save(void)
257 debug("--- current_save ---\n");
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);
263 setenv("partition", buf);
264 strncpy(last_partition, buf, 16);
266 debug("=> partition %s\n", buf);
268 setenv("partition", NULL);
269 last_partition[0] = '\0';
271 debug("=> partition NULL\n");
278 * Produce a mtd_info given a type and num.
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
285 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
289 sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
290 *mtd = get_mtd_device_nm(mtd_dev);
292 printf("Device %s not found!\n", mtd_dev);
300 * Performs sanity check for supplied flash partition.
301 * Table of existing MTD flash devices is searched and partition device
302 * is located. Alignment with the granularity of nand erasesize is verified.
304 * @param id of the parent device
305 * @param part partition to validate
306 * @return 0 if partition is valid, 1 otherwise
308 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
310 struct mtd_info *mtd = NULL;
314 if (get_mtd_info(id->type, id->num, &mtd))
317 part->sector_size = mtd->erasesize;
319 if (!mtd->numeraseregions) {
321 * Only one eraseregion (NAND, OneNAND or uniform NOR),
322 * checking for alignment is easy here
324 if ((unsigned long)part->offset % mtd->erasesize) {
325 printf("%s%d: partition (%s) start offset"
326 "alignment incorrect\n",
327 MTD_DEV_TYPE(id->type), id->num, part->name);
331 if (part->size % mtd->erasesize) {
332 printf("%s%d: partition (%s) size alignment incorrect\n",
333 MTD_DEV_TYPE(id->type), id->num, part->name);
338 * Multiple eraseregions (non-uniform NOR),
339 * checking for alignment is more complex here
342 /* Check start alignment */
343 for (i = 0; i < mtd->numeraseregions; i++) {
344 start = mtd->eraseregions[i].offset;
345 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
346 if (part->offset == start)
348 start += mtd->eraseregions[i].erasesize;
352 printf("%s%d: partition (%s) start offset alignment incorrect\n",
353 MTD_DEV_TYPE(id->type), id->num, part->name);
358 /* Check end/size alignment */
359 for (i = 0; i < mtd->numeraseregions; i++) {
360 start = mtd->eraseregions[i].offset;
361 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
362 if ((part->offset + part->size) == start)
364 start += mtd->eraseregions[i].erasesize;
367 /* Check last sector alignment */
368 if ((part->offset + part->size) == start)
371 printf("%s%d: partition (%s) size alignment incorrect\n",
372 MTD_DEV_TYPE(id->type), id->num, part->name);
384 * Performs sanity check for supplied partition. Offset and size are verified
385 * to be within valid range. Partition type is checked and either
386 * parts_validate_nor() or parts_validate_nand() is called with the argument
389 * @param id of the parent device
390 * @param part partition to validate
391 * @return 0 if partition is valid, 1 otherwise
393 static int part_validate(struct mtdids *id, struct part_info *part)
395 if (part->size == SIZE_REMAINING)
396 part->size = id->size - part->offset;
398 if (part->offset > id->size) {
399 printf("%s: offset %08x beyond flash size %08x\n",
400 id->mtd_id, part->offset, id->size);
404 if ((part->offset + part->size) <= part->offset) {
405 printf("%s%d: partition (%s) size too big\n",
406 MTD_DEV_TYPE(id->type), id->num, part->name);
410 if (part->offset + part->size > id->size) {
411 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
416 * Now we need to check if the partition starts and ends on
417 * sector (eraseblock) regions
419 return part_validate_eraseblock(id, part);
423 * Delete selected partition from the partition list of the specified device.
425 * @param dev device to delete partition from
426 * @param part partition to delete
427 * @return 0 on success, 1 otherwise
429 static int part_del(struct mtd_device *dev, struct part_info *part)
431 u8 current_save_needed = 0;
433 /* if there is only one partition, remove whole device */
434 if (dev->num_parts == 1)
435 return device_del(dev);
437 /* otherwise just delete this partition */
439 if (dev == current_mtd_dev) {
440 /* we are modyfing partitions for the current device,
442 struct part_info *curr_pi;
443 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
446 if (curr_pi == part) {
447 printf("current partition deleted, resetting current to 0\n");
448 current_mtd_partnum = 0;
449 } else if (part->offset <= curr_pi->offset) {
450 current_mtd_partnum--;
452 current_save_needed = 1;
456 list_del(&part->link);
460 if (current_save_needed > 0)
469 * Delete all partitions from parts head list, free memory.
471 * @param head list of partitions to delete
473 static void part_delall(struct list_head *head)
475 struct list_head *entry, *n;
476 struct part_info *part_tmp;
478 /* clean tmp_list and free allocated memory */
479 list_for_each_safe(entry, n, head) {
480 part_tmp = list_entry(entry, struct part_info, link);
488 * Add new partition to the supplied partition list. Make sure partitions are
489 * sorted by offset in ascending order.
491 * @param head list this partition is to be added to
492 * @param new partition to be added
494 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
496 struct list_head *entry;
497 struct part_info *new_pi, *curr_pi;
499 /* link partition to parrent dev */
502 if (list_empty(&dev->parts)) {
503 debug("part_sort_add: list empty\n");
504 list_add(&part->link, &dev->parts);
510 new_pi = list_entry(&part->link, struct part_info, link);
512 /* get current partition info if we are updating current device */
514 if (dev == current_mtd_dev)
515 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
517 list_for_each(entry, &dev->parts) {
518 struct part_info *pi;
520 pi = list_entry(entry, struct part_info, link);
522 /* be compliant with kernel cmdline, allow only one partition at offset zero */
523 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
524 printf("cannot add second partition at offset 0\n");
528 if (new_pi->offset <= pi->offset) {
529 list_add_tail(&part->link, entry);
532 if (curr_pi && (pi->offset <= curr_pi->offset)) {
533 /* we are modyfing partitions for the current
534 * device, update current */
535 current_mtd_partnum++;
544 list_add_tail(&part->link, &dev->parts);
551 * Add provided partition to the partition list of a given device.
553 * @param dev device to which partition is added
554 * @param part partition to be added
555 * @return 0 on success, 1 otherwise
557 static int part_add(struct mtd_device *dev, struct part_info *part)
559 /* verify alignment and size */
560 if (part_validate(dev->id, part) != 0)
563 /* partition is ok, add it to the list */
564 if (part_sort_add(dev, part) != 0)
571 * Parse one partition definition, allocate memory and return pointer to this
572 * location in retpart.
574 * @param partdef pointer to the partition definition string i.e. <part-def>
575 * @param ret output pointer to next char after parse completes (output)
576 * @param retpart pointer to the allocated partition (output)
577 * @return 0 on success, 1 otherwise
579 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
581 struct part_info *part;
583 unsigned long offset;
586 unsigned int mask_flags;
593 /* fetch the partition size */
595 /* assign all remaining space to this partition */
596 debug("'-': remaining size assigned\n");
597 size = SIZE_REMAINING;
600 size = memsize_parse(p, &p);
601 if (size < MIN_PART_SIZE) {
602 printf("partition size too small (%lx)\n", size);
607 /* check for offset */
608 offset = OFFSET_NOT_SPECIFIED;
611 offset = memsize_parse(p, &p);
614 /* now look for the name */
617 if ((p = strchr(name, ')')) == NULL) {
618 printf("no closing ) found in partition name\n");
621 name_len = p - name + 1;
622 if ((name_len - 1) == 0) {
623 printf("empty partition name\n");
628 /* 0x00000000@0x00000000 */
633 /* test for options */
635 if (strncmp(p, "ro", 2) == 0) {
636 mask_flags |= MTD_WRITEABLE_CMD;
640 /* check for next partition definition */
642 if (size == SIZE_REMAINING) {
644 printf("no partitions allowed after a fill-up partition\n");
648 } else if ((*p == ';') || (*p == '\0')) {
651 printf("unexpected character '%c' at the end of partition\n", *p);
656 /* allocate memory */
657 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
659 printf("out of memory\n");
662 memset(part, 0, sizeof(struct part_info) + name_len);
664 part->offset = offset;
665 part->mask_flags = mask_flags;
666 part->name = (char *)(part + 1);
669 /* copy user provided name */
670 strncpy(part->name, name, name_len - 1);
673 /* auto generated name in form of size@offset */
674 sprintf(part->name, "0x%08lx@0x%08lx", size, offset);
678 part->name[name_len - 1] = '\0';
679 INIT_LIST_HEAD(&part->link);
681 debug("+ partition: name %-22s size 0x%08x offset 0x%08x mask flags %d\n",
682 part->name, part->size,
683 part->offset, part->mask_flags);
690 * Check device number to be within valid range for given device type.
692 * @param type mtd type
693 * @param num mtd number
694 * @param size a pointer to the size of the mtd device (output)
695 * @return 0 if device is valid, 1 otherwise
697 static int mtd_device_validate(u8 type, u8 num, u32 *size)
699 struct mtd_info *mtd = NULL;
701 if (get_mtd_info(type, num, &mtd))
710 * Delete all mtd devices from a supplied devices list, free memory allocated for
711 * each device and delete all device partitions.
713 * @return 0 on success, 1 otherwise
715 static int device_delall(struct list_head *head)
717 struct list_head *entry, *n;
718 struct mtd_device *dev_tmp;
720 /* clean devices list */
721 list_for_each_safe(entry, n, head) {
722 dev_tmp = list_entry(entry, struct mtd_device, link);
724 part_delall(&dev_tmp->parts);
727 INIT_LIST_HEAD(&devices);
733 * If provided device exists it's partitions are deleted, device is removed
734 * from device list and device memory is freed.
736 * @param dev device to be deleted
737 * @return 0 on success, 1 otherwise
739 static int device_del(struct mtd_device *dev)
741 part_delall(&dev->parts);
742 list_del(&dev->link);
745 if (dev == current_mtd_dev) {
746 /* we just deleted current device */
747 if (list_empty(&devices)) {
748 current_mtd_dev = NULL;
750 /* reset first partition from first dev from the
751 * devices list as current */
752 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
753 current_mtd_partnum = 0;
764 * Search global device list and return pointer to the device of type and num
767 * @param type device type
768 * @param num device number
769 * @return NULL if requested device does not exist
771 struct mtd_device *device_find(u8 type, u8 num)
773 struct list_head *entry;
774 struct mtd_device *dev_tmp;
776 list_for_each(entry, &devices) {
777 dev_tmp = list_entry(entry, struct mtd_device, link);
779 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
787 * Add specified device to the global device list.
789 * @param dev device to be added
791 static void device_add(struct mtd_device *dev)
793 u8 current_save_needed = 0;
795 if (list_empty(&devices)) {
796 current_mtd_dev = dev;
797 current_mtd_partnum = 0;
798 current_save_needed = 1;
801 list_add_tail(&dev->link, &devices);
803 if (current_save_needed > 0)
810 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
811 * return pointer to the device structure.
813 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
814 * @param ret output pointer to next char after parse completes (output)
815 * @param retdev pointer to the allocated device (output)
816 * @return 0 on success, 1 otherwise
818 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
820 struct mtd_device *dev;
821 struct part_info *part;
824 unsigned int mtd_id_len;
828 struct list_head *entry, *n;
833 debug("===device_parse===\n");
842 mtd_id = p = mtd_dev;
843 if (!(p = strchr(mtd_id, ':'))) {
844 printf("no <mtd-id> identifier\n");
847 mtd_id_len = p - mtd_id + 1;
850 /* verify if we have a valid device specified */
851 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
852 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
857 pend = strchr(p, ';');
859 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
860 id->type, MTD_DEV_TYPE(id->type),
861 id->num, id->mtd_id);
862 debug("parsing partitions %.*s\n", (pend ? pend - p : strlen(p)), p);
865 /* parse partitions */
869 if ((dev = device_find(id->type, id->num)) != NULL) {
870 /* if device already exists start at the end of the last partition */
871 part = list_entry(dev->parts.prev, struct part_info, link);
872 offset = part->offset + part->size;
875 while (p && (*p != '\0') && (*p != ';')) {
877 if ((part_parse(p, &p, &part) != 0) || (!part))
880 /* calculate offset when not specified */
881 if (part->offset == OFFSET_NOT_SPECIFIED)
882 part->offset = offset;
884 offset = part->offset;
886 /* verify alignment and size */
887 if (part_validate(id, part) != 0)
890 offset += part->size;
892 /* partition is ok, add it to the list */
893 list_add_tail(&part->link, &tmp_list);
898 part_delall(&tmp_list);
902 if (num_parts == 0) {
903 printf("no partitions for device %s%d (%s)\n",
904 MTD_DEV_TYPE(id->type), id->num, id->mtd_id);
908 debug("\ntotal partitions: %d\n", num_parts);
910 /* check for next device presence */
915 } else if (*p == '\0') {
919 printf("unexpected character '%c' at the end of device\n", *p);
926 /* allocate memory for mtd_device structure */
927 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
928 printf("out of memory\n");
931 memset(dev, 0, sizeof(struct mtd_device));
933 dev->num_parts = 0; /* part_sort_add increments num_parts */
934 INIT_LIST_HEAD(&dev->parts);
935 INIT_LIST_HEAD(&dev->link);
937 /* move partitions from tmp_list to dev->parts */
938 list_for_each_safe(entry, n, &tmp_list) {
939 part = list_entry(entry, struct part_info, link);
941 if (part_sort_add(dev, part) != 0) {
954 * Initialize global device list.
956 * @return 0 on success, 1 otherwise
958 static int mtd_devices_init(void)
960 last_parts[0] = '\0';
961 current_mtd_dev = NULL;
964 return device_delall(&devices);
968 * Search global mtdids list and find id of requested type and number.
970 * @return pointer to the id if it exists, NULL otherwise
972 static struct mtdids* id_find(u8 type, u8 num)
974 struct list_head *entry;
977 list_for_each(entry, &mtdids) {
978 id = list_entry(entry, struct mtdids, link);
980 if ((id->type == type) && (id->num == num))
988 * Search global mtdids list and find id of a requested mtd_id.
990 * Note: first argument is not null terminated.
992 * @param mtd_id string containing requested mtd_id
993 * @param mtd_id_len length of supplied mtd_id
994 * @return pointer to the id if it exists, NULL otherwise
996 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
998 struct list_head *entry;
1001 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1002 mtd_id_len, mtd_id, mtd_id_len);
1004 list_for_each(entry, &mtdids) {
1005 id = list_entry(entry, struct mtdids, link);
1007 debug("entry: '%s' (len = %d)\n",
1008 id->mtd_id, strlen(id->mtd_id));
1010 if (mtd_id_len != strlen(id->mtd_id))
1012 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1020 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
1021 * return device type and number.
1023 * @param id string describing device id
1024 * @param ret_id output pointer to next char after parse completes (output)
1025 * @param dev_type parsed device type (output)
1026 * @param dev_num parsed device number (output)
1027 * @return 0 on success, 1 otherwise
1029 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1035 if (strncmp(p, "nand", 4) == 0) {
1036 *dev_type = MTD_DEV_TYPE_NAND;
1038 } else if (strncmp(p, "nor", 3) == 0) {
1039 *dev_type = MTD_DEV_TYPE_NOR;
1041 } else if (strncmp(p, "onenand", 7) == 0) {
1042 *dev_type = MTD_DEV_TYPE_ONENAND;
1045 printf("incorrect device type in %s\n", id);
1050 printf("incorrect device number in %s\n", id);
1054 *dev_num = simple_strtoul(p, (char **)&p, 0);
1061 * Process all devices and generate corresponding mtdparts string describing
1062 * all partitions on all devices.
1064 * @param buf output buffer holding generated mtdparts string (output)
1065 * @param buflen buffer size
1066 * @return 0 on success, 1 otherwise
1068 static int generate_mtdparts(char *buf, u32 buflen)
1070 struct list_head *pentry, *dentry;
1071 struct mtd_device *dev;
1072 struct part_info *part, *prev_part;
1075 u32 size, offset, len, part_cnt;
1076 u32 maxlen = buflen - 1;
1078 debug("--- generate_mtdparts ---\n");
1080 if (list_empty(&devices)) {
1085 sprintf(p, "mtdparts=");
1088 list_for_each(dentry, &devices) {
1089 dev = list_entry(dentry, struct mtd_device, link);
1092 len = strlen(dev->id->mtd_id) + 1;
1095 memcpy(p, dev->id->mtd_id, len - 1);
1100 /* format partitions */
1103 list_for_each(pentry, &dev->parts) {
1104 part = list_entry(pentry, struct part_info, link);
1106 offset = part->offset;
1109 /* partition size */
1110 memsize_format(tmpbuf, size);
1111 len = strlen(tmpbuf);
1114 memcpy(p, tmpbuf, len);
1119 /* add offset only when there is a gap between
1121 if ((!prev_part && (offset != 0)) ||
1122 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1124 memsize_format(tmpbuf, offset);
1125 len = strlen(tmpbuf) + 1;
1129 memcpy(p, tmpbuf, len - 1);
1134 /* copy name only if user supplied */
1135 if(!part->auto_name) {
1136 len = strlen(part->name) + 2;
1141 memcpy(p, part->name, len - 2);
1148 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1157 /* print ',' separator if there are other partitions
1159 if (dev->num_parts > part_cnt) {
1167 /* print ';' separator if there are other devices following */
1168 if (dentry->next != &devices) {
1176 /* we still have at least one char left, as we decremented maxlen at
1183 last_parts[0] = '\0';
1188 * Call generate_mtdparts to process all devices and generate corresponding
1189 * mtdparts string, save it in mtdparts environment variable.
1191 * @param buf output buffer holding generated mtdparts string (output)
1192 * @param buflen buffer size
1193 * @return 0 on success, 1 otherwise
1195 static int generate_mtdparts_save(char *buf, u32 buflen)
1199 ret = generate_mtdparts(buf, buflen);
1201 if ((buf[0] != '\0') && (ret == 0))
1202 setenv("mtdparts", buf);
1204 setenv("mtdparts", NULL);
1209 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1211 * Get the net size (w/o bad blocks) of the given partition.
1213 * @param mtd the mtd info
1214 * @param part the partition
1215 * @return the calculated net size of this partition
1217 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1219 uint64_t i, net_size = 0;
1221 if (!mtd->block_isbad)
1224 for (i = 0; i < part->size; i += mtd->erasesize) {
1225 if (!mtd->block_isbad(mtd, part->offset + i))
1226 net_size += mtd->erasesize;
1233 static void print_partition_table(void)
1235 struct list_head *dentry, *pentry;
1236 struct part_info *part;
1237 struct mtd_device *dev;
1240 list_for_each(dentry, &devices) {
1241 dev = list_entry(dentry, struct mtd_device, link);
1242 /* list partitions for given device */
1244 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1245 struct mtd_info *mtd;
1247 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1250 printf("\ndevice %s%d <%s>, # parts = %d\n",
1251 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1252 dev->id->mtd_id, dev->num_parts);
1253 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1255 list_for_each(pentry, &dev->parts) {
1259 part = list_entry(pentry, struct part_info, link);
1260 net_size = net_part_size(mtd, part);
1261 size_note = part->size == net_size ? " " : " (!)";
1262 printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n",
1263 part_num, part->name, part->size,
1264 net_size, size_note, part->offset,
1266 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1267 printf("\ndevice %s%d <%s>, # parts = %d\n",
1268 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1269 dev->id->mtd_id, dev->num_parts);
1270 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1272 list_for_each(pentry, &dev->parts) {
1273 part = list_entry(pentry, struct part_info, link);
1274 printf("%2d: %-20s0x%08x\t0x%08x\t%d\n",
1275 part_num, part->name, part->size,
1276 part->offset, part->mask_flags);
1277 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1282 if (list_empty(&devices))
1283 printf("no partitions defined\n");
1287 * Format and print out a partition list for each device from global device
1290 static void list_partitions(void)
1292 struct part_info *part;
1294 debug("\n---list_partitions---\n");
1295 print_partition_table();
1297 /* current_mtd_dev is not NULL only when we have non empty device list */
1298 if (current_mtd_dev) {
1299 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1301 printf("\nactive partition: %s%d,%d - (%s) 0x%08x @ 0x%08x\n",
1302 MTD_DEV_TYPE(current_mtd_dev->id->type),
1303 current_mtd_dev->id->num, current_mtd_partnum,
1304 part->name, part->size, part->offset);
1306 printf("could not get current partition info\n\n");
1310 printf("\ndefaults:\n");
1311 printf("mtdids : %s\n",
1312 mtdids_default ? mtdids_default : "none");
1314 * Using printf() here results in printbuffer overflow
1315 * if default mtdparts string is greater than console
1316 * printbuffer. Use puts() to prevent system crashes.
1319 puts(mtdparts_default ? mtdparts_default : "none");
1324 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1325 * corresponding device and verify partition number.
1327 * @param id string describing device and partition or partition name
1328 * @param dev pointer to the requested device (output)
1329 * @param part_num verified partition number (output)
1330 * @param part pointer to requested partition (output)
1331 * @return 0 on success, 1 otherwise
1333 int find_dev_and_part(const char *id, struct mtd_device **dev,
1334 u8 *part_num, struct part_info **part)
1336 struct list_head *dentry, *pentry;
1337 u8 type, dnum, pnum;
1340 debug("--- find_dev_and_part ---\nid = %s\n", id);
1342 list_for_each(dentry, &devices) {
1344 *dev = list_entry(dentry, struct mtd_device, link);
1345 list_for_each(pentry, &(*dev)->parts) {
1346 *part = list_entry(pentry, struct part_info, link);
1347 if (strcmp((*part)->name, id) == 0)
1358 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1361 if ((*p++ != ',') || (*p == '\0')) {
1362 printf("no partition number specified\n");
1365 pnum = simple_strtoul(p, (char **)&p, 0);
1367 printf("unexpected trailing character '%c'\n", *p);
1371 if ((*dev = device_find(type, dnum)) == NULL) {
1372 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1376 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1377 printf("no such partition\n");
1388 * Find and delete partition. For partition id format see find_dev_and_part().
1390 * @param id string describing device and partition
1391 * @return 0 on success, 1 otherwise
1393 static int delete_partition(const char *id)
1396 struct mtd_device *dev;
1397 struct part_info *part;
1399 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1401 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08x@0x%08x\n",
1402 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1403 part->name, part->size, part->offset);
1405 if (part_del(dev, part) != 0)
1408 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1409 printf("generated mtdparts too long, resetting to null\n");
1415 printf("partition %s not found\n", id);
1419 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1421 * Increase the size of the given partition so that it's net size is at least
1422 * as large as the size member and such that the next partition would start on a
1423 * good block if it were adjacent to this partition.
1425 * @param mtd the mtd device
1426 * @param part the partition
1427 * @param next_offset pointer to the offset of the next partition after this
1428 * partition's size has been modified (output)
1430 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1431 uint64_t *next_offset)
1433 uint64_t net_size, padding_size = 0;
1436 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1440 * Absorb bad blocks immediately following this
1441 * partition also into the partition, such that
1442 * the next partition starts with a good block.
1445 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1446 mtd->erasesize, &padding_size, &truncated);
1450 padding_size -= mtd->erasesize;
1454 printf("truncated partition %s to %lld bytes\n", part->name,
1455 (uint64_t) net_size + padding_size);
1458 part->size = net_size + padding_size;
1459 *next_offset = part->offset + part->size;
1463 * Adjust all of the partition sizes, such that all partitions are at least
1464 * as big as their mtdparts environment variable sizes and they each start
1467 * @return 0 on success, 1 otherwise
1469 static int spread_partitions(void)
1471 struct list_head *dentry, *pentry;
1472 struct mtd_device *dev;
1473 struct part_info *part;
1474 struct mtd_info *mtd;
1478 list_for_each(dentry, &devices) {
1479 dev = list_entry(dentry, struct mtd_device, link);
1481 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1486 list_for_each(pentry, &dev->parts) {
1487 part = list_entry(pentry, struct part_info, link);
1489 debug("spread_partitions: device = %s%d, partition %d ="
1490 " (%s) 0x%08x@0x%08x\n",
1491 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1492 part_num, part->name, part->size,
1495 if (cur_offs > part->offset)
1496 part->offset = cur_offs;
1498 spread_partition(mtd, part, &cur_offs);
1506 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1507 printf("generated mtdparts too long, resetting to null\n");
1512 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1515 * Accept character string describing mtd partitions and call device_parse()
1516 * for each entry. Add created devices to the global devices list.
1518 * @param mtdparts string specifing mtd partitions
1519 * @return 0 on success, 1 otherwise
1521 static int parse_mtdparts(const char *const mtdparts)
1523 const char *p = mtdparts;
1524 struct mtd_device *dev;
1526 char tmp_parts[MTDPARTS_MAXLEN];
1528 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", p);
1530 /* delete all devices and partitions */
1531 if (mtd_devices_init() != 0) {
1532 printf("could not initialise device list\n");
1536 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1537 if (gd->flags & GD_FLG_ENV_READY) {
1538 p = getenv("mtdparts");
1541 getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1544 if (strncmp(p, "mtdparts=", 9) != 0) {
1545 printf("mtdparts variable doesn't start with 'mtdparts='\n");
1550 while (p && (*p != '\0')) {
1552 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1555 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1556 dev->id->num, dev->id->mtd_id);
1558 /* check if parsed device is already on the list */
1559 if (device_find(dev->id->type, dev->id->num) != NULL) {
1560 printf("device %s%d redefined, please correct mtdparts variable\n",
1561 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1565 list_add_tail(&dev->link, &devices);
1569 device_delall(&devices);
1577 * Parse provided string describing mtdids mapping (see file header for mtdids
1578 * variable format). Allocate memory for each entry and add all found entries
1579 * to the global mtdids list.
1581 * @param ids mapping string
1582 * @return 0 on success, 1 otherwise
1584 static int parse_mtdids(const char *const ids)
1586 const char *p = ids;
1590 struct list_head *entry, *n;
1591 struct mtdids *id_tmp;
1596 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1598 /* clean global mtdids list */
1599 list_for_each_safe(entry, n, &mtdids) {
1600 id_tmp = list_entry(entry, struct mtdids, link);
1601 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1606 INIT_LIST_HEAD(&mtdids);
1608 while(p && (*p != '\0')) {
1611 /* parse 'nor'|'nand'|'onenand'<dev-num> */
1612 if (mtd_id_parse(p, &p, &type, &num) != 0)
1616 printf("mtdids: incorrect <dev-num>\n");
1621 /* check if requested device exists */
1622 if (mtd_device_validate(type, num, &size) != 0)
1625 /* locate <mtd-id> */
1627 if ((p = strchr(mtd_id, ',')) != NULL) {
1628 mtd_id_len = p - mtd_id + 1;
1631 mtd_id_len = strlen(mtd_id) + 1;
1633 if (mtd_id_len == 0) {
1634 printf("mtdids: no <mtd-id> identifier\n");
1638 /* check if this id is already on the list */
1639 int double_entry = 0;
1640 list_for_each(entry, &mtdids) {
1641 id_tmp = list_entry(entry, struct mtdids, link);
1642 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1648 printf("device id %s%d redefined, please correct mtdids variable\n",
1649 MTD_DEV_TYPE(type), num);
1653 /* allocate mtdids structure */
1654 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1655 printf("out of memory\n");
1658 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1662 id->mtd_id = (char *)(id + 1);
1663 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1664 id->mtd_id[mtd_id_len - 1] = '\0';
1665 INIT_LIST_HEAD(&id->link);
1667 debug("+ id %s%d\t%16d bytes\t%s\n",
1668 MTD_DEV_TYPE(id->type), id->num,
1669 id->size, id->mtd_id);
1671 list_add_tail(&id->link, &mtdids);
1675 /* clean mtdids list and free allocated memory */
1676 list_for_each_safe(entry, n, &mtdids) {
1677 id_tmp = list_entry(entry, struct mtdids, link);
1688 * Parse and initialize global mtdids mapping and create global
1689 * device/partition list.
1691 * @return 0 on success, 1 otherwise
1693 int mtdparts_init(void)
1695 static int initialized = 0;
1696 const char *ids, *parts;
1697 const char *current_partition;
1699 char tmp_ep[PARTITION_MAXLEN];
1700 char tmp_parts[MTDPARTS_MAXLEN];
1702 debug("\n---mtdparts_init---\n");
1704 INIT_LIST_HEAD(&mtdids);
1705 INIT_LIST_HEAD(&devices);
1706 memset(last_ids, 0, MTDIDS_MAXLEN);
1707 memset(last_parts, 0, MTDPARTS_MAXLEN);
1708 memset(last_partition, 0, PARTITION_MAXLEN);
1713 ids = getenv("mtdids");
1715 * The mtdparts variable tends to be long. If we need to access it
1716 * before the env is relocated, then we need to use our own stack
1717 * buffer. gd->env_buf will be too small.
1719 if (gd->flags & GD_FLG_ENV_READY) {
1720 parts = getenv("mtdparts");
1723 getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1725 current_partition = getenv("partition");
1727 /* save it for later parsing, cannot rely on current partition pointer
1728 * as 'partition' variable may be updated during init */
1730 if (current_partition)
1731 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1733 debug("last_ids : %s\n", last_ids);
1734 debug("env_ids : %s\n", ids);
1735 debug("last_parts: %s\n", last_parts);
1736 debug("env_parts : %s\n\n", parts);
1738 debug("last_partition : %s\n", last_partition);
1739 debug("env_partition : %s\n", current_partition);
1741 /* if mtdids varible is empty try to use defaults */
1743 if (mtdids_default) {
1744 debug("mtdids variable not defined, using default\n");
1745 ids = mtdids_default;
1746 setenv("mtdids", (char *)ids);
1748 printf("mtdids not defined, no default present\n");
1752 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1753 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1757 /* do no try to use defaults when mtdparts variable is not defined,
1758 * just check the length */
1760 printf("mtdparts variable not set, see 'help mtdparts'\n");
1762 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1763 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1767 /* check if we have already parsed those mtdids */
1768 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1773 if (parse_mtdids(ids) != 0) {
1778 /* ok it's good, save new ids */
1779 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1782 /* parse partitions if either mtdparts or mtdids were updated */
1783 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1784 if (parse_mtdparts(parts) != 0)
1787 if (list_empty(&devices)) {
1788 printf("mtdparts_init: no valid partitions\n");
1792 /* ok it's good, save new parts */
1793 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1795 /* reset first partition from first dev from the list as current */
1796 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1797 current_mtd_partnum = 0;
1800 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1801 MTD_DEV_TYPE(current_mtd_dev->id->type),
1802 current_mtd_dev->id->num, current_mtd_partnum);
1805 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1806 if (!parts && (last_parts[0] != '\0'))
1807 return mtd_devices_init();
1809 /* do not process current partition if mtdparts variable is null */
1813 /* is current partition set in environment? if so, use it */
1814 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1815 struct part_info *p;
1816 struct mtd_device *cdev;
1819 debug("--- getting current partition: %s\n", tmp_ep);
1821 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1822 current_mtd_dev = cdev;
1823 current_mtd_partnum = pnum;
1826 } else if (getenv("partition") == NULL) {
1827 debug("no partition variable set, setting...\n");
1835 * Return pointer to the partition of a requested number from a requested
1838 * @param dev device that is to be searched for a partition
1839 * @param part_num requested partition number
1840 * @return pointer to the part_info, NULL otherwise
1842 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1844 struct list_head *entry;
1845 struct part_info *part;
1851 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1852 part_num, MTD_DEV_TYPE(dev->id->type),
1853 dev->id->num, dev->id->mtd_id);
1855 if (part_num >= dev->num_parts) {
1856 printf("invalid partition number %d for device %s%d (%s)\n",
1857 part_num, MTD_DEV_TYPE(dev->id->type),
1858 dev->id->num, dev->id->mtd_id);
1862 /* locate partition number, return it */
1864 list_for_each(entry, &dev->parts) {
1865 part = list_entry(entry, struct part_info, link);
1867 if (part_num == num++) {
1875 /***************************************************/
1876 /* U-boot commands */
1877 /***************************************************/
1878 /* command line only */
1880 * Routine implementing u-boot chpart command. Sets new current partition based
1881 * on the user supplied partition id. For partition id format see find_dev_and_part().
1883 * @param cmdtp command internal data
1884 * @param flag command flag
1885 * @param argc number of arguments supplied to the command
1886 * @param argv arguments list
1887 * @return 0 on success, 1 otherwise
1889 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1891 /* command line only */
1892 struct mtd_device *dev;
1893 struct part_info *part;
1896 if (mtdparts_init() !=0)
1900 printf("no partition id specified\n");
1904 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1907 current_mtd_dev = dev;
1908 current_mtd_partnum = pnum;
1911 printf("partition changed to %s%d,%d\n",
1912 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1918 * Routine implementing u-boot mtdparts command. Initialize/update default global
1919 * partition list and process user partition request (list, add, del).
1921 * @param cmdtp command internal data
1922 * @param flag command flag
1923 * @param argc number of arguments supplied to the command
1924 * @param argv arguments list
1925 * @return 0 on success, 1 otherwise
1927 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1928 char * const argv[])
1931 if (strcmp(argv[1], "default") == 0) {
1932 setenv("mtdids", (char *)mtdids_default);
1933 setenv("mtdparts", (char *)mtdparts_default);
1934 setenv("partition", NULL);
1938 } else if (strcmp(argv[1], "delall") == 0) {
1939 /* this may be the first run, initialize lists if needed */
1942 setenv("mtdparts", NULL);
1944 /* mtd_devices_init() calls current_save() */
1945 return mtd_devices_init();
1949 /* make sure we are in sync with env variables */
1950 if (mtdparts_init() != 0)
1958 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1959 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1960 #define PART_ADD_DESC_MAXLEN 64
1961 char tmpbuf[PART_ADD_DESC_MAXLEN];
1962 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1963 struct mtd_info *mtd;
1964 uint64_t next_offset;
1967 struct mtd_device *dev;
1968 struct mtd_device *dev_tmp;
1970 struct part_info *p;
1972 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
1975 if ((id = id_find(type, num)) == NULL) {
1976 printf("no such device %s defined in mtdids variable\n", argv[2]);
1980 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
1981 len += strlen(argv[3]); /* size@offset */
1982 len += strlen(argv[4]) + 2; /* '(' name ')' */
1983 if (argv[5] && (strlen(argv[5]) == 2))
1984 len += 2; /* 'ro' */
1986 if (len >= PART_ADD_DESC_MAXLEN) {
1987 printf("too long partition description\n");
1990 sprintf(tmpbuf, "%s:%s(%s)%s",
1991 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
1992 debug("add tmpbuf: %s\n", tmpbuf);
1994 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
1997 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1998 dev->id->num, dev->id->mtd_id);
2000 p = list_entry(dev->parts.next, struct part_info, link);
2002 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2003 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2006 if (!strcmp(&argv[1][3], ".spread")) {
2007 spread_partition(mtd, p, &next_offset);
2008 debug("increased %s to %d bytes\n", p->name, p->size);
2012 dev_tmp = device_find(dev->id->type, dev->id->num);
2013 if (dev_tmp == NULL) {
2015 } else if (part_add(dev_tmp, p) != 0) {
2016 /* merge new partition with existing ones*/
2021 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2022 printf("generated mtdparts too long, resetting to null\n");
2029 /* mtdparts del part-id */
2030 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2031 debug("del: part-id = %s\n", argv[2]);
2033 return delete_partition(argv[2]);
2036 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2037 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2038 return spread_partitions();
2039 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2041 return CMD_RET_USAGE;
2044 /***************************************************/
2046 chpart, 2, 0, do_chpart,
2047 "change active partition",
2049 " - change active partition (e.g. part-id = nand0,1)"
2052 #ifdef CONFIG_SYS_LONGHELP
2053 static char mtdparts_help_text[] =
2055 " - list partition table\n"
2057 " - delete all partitions\n"
2058 "mtdparts del part-id\n"
2059 " - delete partition (e.g. part-id = nand0,1)\n"
2060 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2061 " - add partition\n"
2062 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2063 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2064 " - add partition, padding size by skipping bad blocks\n"
2066 "mtdparts default\n"
2067 " - reset partition table to defaults\n"
2068 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2070 " - adjust the sizes of the partitions so they are\n"
2071 " at least as big as the mtdparts variable specifies\n"
2072 " and they each start on a good block\n\n"
2075 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2077 "this command uses three environment variables:\n\n"
2078 "'partition' - keeps current partition identifier\n\n"
2079 "partition := <part-id>\n"
2080 "<part-id> := <dev-id>,part_num\n\n"
2081 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2082 "mtdids=<idmap>[,<idmap>,...]\n\n"
2083 "<idmap> := <dev-id>=<mtd-id>\n"
2084 "<dev-id> := 'nand'|'nor'|'onenand'<dev-num>\n"
2085 "<dev-num> := mtd device number, 0...\n"
2086 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2087 "'mtdparts' - partition list\n\n"
2088 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2089 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2090 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2091 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2092 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2093 "<offset> := partition start offset within the device\n"
2094 "<name> := '(' NAME ')'\n"
2095 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2099 mtdparts, 6, 0, do_mtdparts,
2100 "define flash/nand partitions", mtdparts_help_text
2102 /***************************************************/