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
385 * verified to be within valid range. Partition type is checked and
386 * part_validate_eraseblock() is called with the argument of part.
388 * @param id of the parent device
389 * @param part partition to validate
390 * @return 0 if partition is valid, 1 otherwise
392 static int part_validate(struct mtdids *id, struct part_info *part)
394 if (part->size == SIZE_REMAINING)
395 part->size = id->size - part->offset;
397 if (part->offset > id->size) {
398 printf("%s: offset %08x beyond flash size %08x\n",
399 id->mtd_id, part->offset, id->size);
403 if ((part->offset + part->size) <= part->offset) {
404 printf("%s%d: partition (%s) size too big\n",
405 MTD_DEV_TYPE(id->type), id->num, part->name);
409 if (part->offset + part->size > id->size) {
410 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
415 * Now we need to check if the partition starts and ends on
416 * sector (eraseblock) regions
418 return part_validate_eraseblock(id, part);
422 * Delete selected partition from the partition list of the specified device.
424 * @param dev device to delete partition from
425 * @param part partition to delete
426 * @return 0 on success, 1 otherwise
428 static int part_del(struct mtd_device *dev, struct part_info *part)
430 u8 current_save_needed = 0;
432 /* if there is only one partition, remove whole device */
433 if (dev->num_parts == 1)
434 return device_del(dev);
436 /* otherwise just delete this partition */
438 if (dev == current_mtd_dev) {
439 /* we are modyfing partitions for the current device,
441 struct part_info *curr_pi;
442 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
445 if (curr_pi == part) {
446 printf("current partition deleted, resetting current to 0\n");
447 current_mtd_partnum = 0;
448 } else if (part->offset <= curr_pi->offset) {
449 current_mtd_partnum--;
451 current_save_needed = 1;
455 list_del(&part->link);
459 if (current_save_needed > 0)
468 * Delete all partitions from parts head list, free memory.
470 * @param head list of partitions to delete
472 static void part_delall(struct list_head *head)
474 struct list_head *entry, *n;
475 struct part_info *part_tmp;
477 /* clean tmp_list and free allocated memory */
478 list_for_each_safe(entry, n, head) {
479 part_tmp = list_entry(entry, struct part_info, link);
487 * Add new partition to the supplied partition list. Make sure partitions are
488 * sorted by offset in ascending order.
490 * @param head list this partition is to be added to
491 * @param new partition to be added
493 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
495 struct list_head *entry;
496 struct part_info *new_pi, *curr_pi;
498 /* link partition to parrent dev */
501 if (list_empty(&dev->parts)) {
502 debug("part_sort_add: list empty\n");
503 list_add(&part->link, &dev->parts);
509 new_pi = list_entry(&part->link, struct part_info, link);
511 /* get current partition info if we are updating current device */
513 if (dev == current_mtd_dev)
514 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
516 list_for_each(entry, &dev->parts) {
517 struct part_info *pi;
519 pi = list_entry(entry, struct part_info, link);
521 /* be compliant with kernel cmdline, allow only one partition at offset zero */
522 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
523 printf("cannot add second partition at offset 0\n");
527 if (new_pi->offset <= pi->offset) {
528 list_add_tail(&part->link, entry);
531 if (curr_pi && (pi->offset <= curr_pi->offset)) {
532 /* we are modyfing partitions for the current
533 * device, update current */
534 current_mtd_partnum++;
543 list_add_tail(&part->link, &dev->parts);
550 * Add provided partition to the partition list of a given device.
552 * @param dev device to which partition is added
553 * @param part partition to be added
554 * @return 0 on success, 1 otherwise
556 static int part_add(struct mtd_device *dev, struct part_info *part)
558 /* verify alignment and size */
559 if (part_validate(dev->id, part) != 0)
562 /* partition is ok, add it to the list */
563 if (part_sort_add(dev, part) != 0)
570 * Parse one partition definition, allocate memory and return pointer to this
571 * location in retpart.
573 * @param partdef pointer to the partition definition string i.e. <part-def>
574 * @param ret output pointer to next char after parse completes (output)
575 * @param retpart pointer to the allocated partition (output)
576 * @return 0 on success, 1 otherwise
578 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
580 struct part_info *part;
582 unsigned long offset;
585 unsigned int mask_flags;
592 /* fetch the partition size */
594 /* assign all remaining space to this partition */
595 debug("'-': remaining size assigned\n");
596 size = SIZE_REMAINING;
599 size = memsize_parse(p, &p);
600 if (size < MIN_PART_SIZE) {
601 printf("partition size too small (%lx)\n", size);
606 /* check for offset */
607 offset = OFFSET_NOT_SPECIFIED;
610 offset = memsize_parse(p, &p);
613 /* now look for the name */
616 if ((p = strchr(name, ')')) == NULL) {
617 printf("no closing ) found in partition name\n");
620 name_len = p - name + 1;
621 if ((name_len - 1) == 0) {
622 printf("empty partition name\n");
627 /* 0x00000000@0x00000000 */
632 /* test for options */
634 if (strncmp(p, "ro", 2) == 0) {
635 mask_flags |= MTD_WRITEABLE_CMD;
639 /* check for next partition definition */
641 if (size == SIZE_REMAINING) {
643 printf("no partitions allowed after a fill-up partition\n");
647 } else if ((*p == ';') || (*p == '\0')) {
650 printf("unexpected character '%c' at the end of partition\n", *p);
655 /* allocate memory */
656 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
658 printf("out of memory\n");
661 memset(part, 0, sizeof(struct part_info) + name_len);
663 part->offset = offset;
664 part->mask_flags = mask_flags;
665 part->name = (char *)(part + 1);
668 /* copy user provided name */
669 strncpy(part->name, name, name_len - 1);
672 /* auto generated name in form of size@offset */
673 sprintf(part->name, "0x%08lx@0x%08lx", size, offset);
677 part->name[name_len - 1] = '\0';
678 INIT_LIST_HEAD(&part->link);
680 debug("+ partition: name %-22s size 0x%08x offset 0x%08x mask flags %d\n",
681 part->name, part->size,
682 part->offset, part->mask_flags);
689 * Check device number to be within valid range for given device type.
691 * @param type mtd type
692 * @param num mtd number
693 * @param size a pointer to the size of the mtd device (output)
694 * @return 0 if device is valid, 1 otherwise
696 static int mtd_device_validate(u8 type, u8 num, u32 *size)
698 struct mtd_info *mtd = NULL;
700 if (get_mtd_info(type, num, &mtd))
709 * Delete all mtd devices from a supplied devices list, free memory allocated for
710 * each device and delete all device partitions.
712 * @return 0 on success, 1 otherwise
714 static int device_delall(struct list_head *head)
716 struct list_head *entry, *n;
717 struct mtd_device *dev_tmp;
719 /* clean devices list */
720 list_for_each_safe(entry, n, head) {
721 dev_tmp = list_entry(entry, struct mtd_device, link);
723 part_delall(&dev_tmp->parts);
726 INIT_LIST_HEAD(&devices);
732 * If provided device exists it's partitions are deleted, device is removed
733 * from device list and device memory is freed.
735 * @param dev device to be deleted
736 * @return 0 on success, 1 otherwise
738 static int device_del(struct mtd_device *dev)
740 part_delall(&dev->parts);
741 list_del(&dev->link);
744 if (dev == current_mtd_dev) {
745 /* we just deleted current device */
746 if (list_empty(&devices)) {
747 current_mtd_dev = NULL;
749 /* reset first partition from first dev from the
750 * devices list as current */
751 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
752 current_mtd_partnum = 0;
763 * Search global device list and return pointer to the device of type and num
766 * @param type device type
767 * @param num device number
768 * @return NULL if requested device does not exist
770 struct mtd_device *device_find(u8 type, u8 num)
772 struct list_head *entry;
773 struct mtd_device *dev_tmp;
775 list_for_each(entry, &devices) {
776 dev_tmp = list_entry(entry, struct mtd_device, link);
778 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
786 * Add specified device to the global device list.
788 * @param dev device to be added
790 static void device_add(struct mtd_device *dev)
792 u8 current_save_needed = 0;
794 if (list_empty(&devices)) {
795 current_mtd_dev = dev;
796 current_mtd_partnum = 0;
797 current_save_needed = 1;
800 list_add_tail(&dev->link, &devices);
802 if (current_save_needed > 0)
809 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
810 * return pointer to the device structure.
812 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
813 * @param ret output pointer to next char after parse completes (output)
814 * @param retdev pointer to the allocated device (output)
815 * @return 0 on success, 1 otherwise
817 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
819 struct mtd_device *dev;
820 struct part_info *part;
823 unsigned int mtd_id_len;
827 struct list_head *entry, *n;
832 debug("===device_parse===\n");
841 mtd_id = p = mtd_dev;
842 if (!(p = strchr(mtd_id, ':'))) {
843 printf("no <mtd-id> identifier\n");
846 mtd_id_len = p - mtd_id + 1;
849 /* verify if we have a valid device specified */
850 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
851 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
856 pend = strchr(p, ';');
858 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
859 id->type, MTD_DEV_TYPE(id->type),
860 id->num, id->mtd_id);
861 debug("parsing partitions %.*s\n", (pend ? pend - p : strlen(p)), p);
864 /* parse partitions */
868 if ((dev = device_find(id->type, id->num)) != NULL) {
869 /* if device already exists start at the end of the last partition */
870 part = list_entry(dev->parts.prev, struct part_info, link);
871 offset = part->offset + part->size;
874 while (p && (*p != '\0') && (*p != ';')) {
876 if ((part_parse(p, &p, &part) != 0) || (!part))
879 /* calculate offset when not specified */
880 if (part->offset == OFFSET_NOT_SPECIFIED)
881 part->offset = offset;
883 offset = part->offset;
885 /* verify alignment and size */
886 if (part_validate(id, part) != 0)
889 offset += part->size;
891 /* partition is ok, add it to the list */
892 list_add_tail(&part->link, &tmp_list);
897 part_delall(&tmp_list);
901 if (num_parts == 0) {
902 printf("no partitions for device %s%d (%s)\n",
903 MTD_DEV_TYPE(id->type), id->num, id->mtd_id);
907 debug("\ntotal partitions: %d\n", num_parts);
909 /* check for next device presence */
914 } else if (*p == '\0') {
918 printf("unexpected character '%c' at the end of device\n", *p);
925 /* allocate memory for mtd_device structure */
926 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
927 printf("out of memory\n");
930 memset(dev, 0, sizeof(struct mtd_device));
932 dev->num_parts = 0; /* part_sort_add increments num_parts */
933 INIT_LIST_HEAD(&dev->parts);
934 INIT_LIST_HEAD(&dev->link);
936 /* move partitions from tmp_list to dev->parts */
937 list_for_each_safe(entry, n, &tmp_list) {
938 part = list_entry(entry, struct part_info, link);
940 if (part_sort_add(dev, part) != 0) {
953 * Initialize global device list.
955 * @return 0 on success, 1 otherwise
957 static int mtd_devices_init(void)
959 last_parts[0] = '\0';
960 current_mtd_dev = NULL;
963 return device_delall(&devices);
967 * Search global mtdids list and find id of requested type and number.
969 * @return pointer to the id if it exists, NULL otherwise
971 static struct mtdids* id_find(u8 type, u8 num)
973 struct list_head *entry;
976 list_for_each(entry, &mtdids) {
977 id = list_entry(entry, struct mtdids, link);
979 if ((id->type == type) && (id->num == num))
987 * Search global mtdids list and find id of a requested mtd_id.
989 * Note: first argument is not null terminated.
991 * @param mtd_id string containing requested mtd_id
992 * @param mtd_id_len length of supplied mtd_id
993 * @return pointer to the id if it exists, NULL otherwise
995 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
997 struct list_head *entry;
1000 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1001 mtd_id_len, mtd_id, mtd_id_len);
1003 list_for_each(entry, &mtdids) {
1004 id = list_entry(entry, struct mtdids, link);
1006 debug("entry: '%s' (len = %d)\n",
1007 id->mtd_id, strlen(id->mtd_id));
1009 if (mtd_id_len != strlen(id->mtd_id))
1011 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1019 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>,
1020 * return device type and number.
1022 * @param id string describing device id
1023 * @param ret_id output pointer to next char after parse completes (output)
1024 * @param dev_type parsed device type (output)
1025 * @param dev_num parsed device number (output)
1026 * @return 0 on success, 1 otherwise
1028 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1034 if (strncmp(p, "nand", 4) == 0) {
1035 *dev_type = MTD_DEV_TYPE_NAND;
1037 } else if (strncmp(p, "nor", 3) == 0) {
1038 *dev_type = MTD_DEV_TYPE_NOR;
1040 } else if (strncmp(p, "onenand", 7) == 0) {
1041 *dev_type = MTD_DEV_TYPE_ONENAND;
1044 printf("incorrect device type in %s\n", id);
1049 printf("incorrect device number in %s\n", id);
1053 *dev_num = simple_strtoul(p, (char **)&p, 0);
1060 * Process all devices and generate corresponding mtdparts string describing
1061 * all partitions on all devices.
1063 * @param buf output buffer holding generated mtdparts string (output)
1064 * @param buflen buffer size
1065 * @return 0 on success, 1 otherwise
1067 static int generate_mtdparts(char *buf, u32 buflen)
1069 struct list_head *pentry, *dentry;
1070 struct mtd_device *dev;
1071 struct part_info *part, *prev_part;
1074 u32 size, offset, len, part_cnt;
1075 u32 maxlen = buflen - 1;
1077 debug("--- generate_mtdparts ---\n");
1079 if (list_empty(&devices)) {
1084 sprintf(p, "mtdparts=");
1087 list_for_each(dentry, &devices) {
1088 dev = list_entry(dentry, struct mtd_device, link);
1091 len = strlen(dev->id->mtd_id) + 1;
1094 memcpy(p, dev->id->mtd_id, len - 1);
1099 /* format partitions */
1102 list_for_each(pentry, &dev->parts) {
1103 part = list_entry(pentry, struct part_info, link);
1105 offset = part->offset;
1108 /* partition size */
1109 memsize_format(tmpbuf, size);
1110 len = strlen(tmpbuf);
1113 memcpy(p, tmpbuf, len);
1118 /* add offset only when there is a gap between
1120 if ((!prev_part && (offset != 0)) ||
1121 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1123 memsize_format(tmpbuf, offset);
1124 len = strlen(tmpbuf) + 1;
1128 memcpy(p, tmpbuf, len - 1);
1133 /* copy name only if user supplied */
1134 if(!part->auto_name) {
1135 len = strlen(part->name) + 2;
1140 memcpy(p, part->name, len - 2);
1147 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1156 /* print ',' separator if there are other partitions
1158 if (dev->num_parts > part_cnt) {
1166 /* print ';' separator if there are other devices following */
1167 if (dentry->next != &devices) {
1175 /* we still have at least one char left, as we decremented maxlen at
1182 last_parts[0] = '\0';
1187 * Call generate_mtdparts to process all devices and generate corresponding
1188 * mtdparts string, save it in mtdparts environment variable.
1190 * @param buf output buffer holding generated mtdparts string (output)
1191 * @param buflen buffer size
1192 * @return 0 on success, 1 otherwise
1194 static int generate_mtdparts_save(char *buf, u32 buflen)
1198 ret = generate_mtdparts(buf, buflen);
1200 if ((buf[0] != '\0') && (ret == 0))
1201 setenv("mtdparts", buf);
1203 setenv("mtdparts", NULL);
1208 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1210 * Get the net size (w/o bad blocks) of the given partition.
1212 * @param mtd the mtd info
1213 * @param part the partition
1214 * @return the calculated net size of this partition
1216 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1218 uint64_t i, net_size = 0;
1220 if (!mtd->block_isbad)
1223 for (i = 0; i < part->size; i += mtd->erasesize) {
1224 if (!mtd->block_isbad(mtd, part->offset + i))
1225 net_size += mtd->erasesize;
1232 static void print_partition_table(void)
1234 struct list_head *dentry, *pentry;
1235 struct part_info *part;
1236 struct mtd_device *dev;
1239 list_for_each(dentry, &devices) {
1240 dev = list_entry(dentry, struct mtd_device, link);
1241 /* list partitions for given device */
1243 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1244 struct mtd_info *mtd;
1246 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1249 printf("\ndevice %s%d <%s>, # parts = %d\n",
1250 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1251 dev->id->mtd_id, dev->num_parts);
1252 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1254 list_for_each(pentry, &dev->parts) {
1258 part = list_entry(pentry, struct part_info, link);
1259 net_size = net_part_size(mtd, part);
1260 size_note = part->size == net_size ? " " : " (!)";
1261 printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n",
1262 part_num, part->name, part->size,
1263 net_size, size_note, part->offset,
1265 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1266 printf("\ndevice %s%d <%s>, # parts = %d\n",
1267 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1268 dev->id->mtd_id, dev->num_parts);
1269 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1271 list_for_each(pentry, &dev->parts) {
1272 part = list_entry(pentry, struct part_info, link);
1273 printf("%2d: %-20s0x%08x\t0x%08x\t%d\n",
1274 part_num, part->name, part->size,
1275 part->offset, part->mask_flags);
1276 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1281 if (list_empty(&devices))
1282 printf("no partitions defined\n");
1286 * Format and print out a partition list for each device from global device
1289 static void list_partitions(void)
1291 struct part_info *part;
1293 debug("\n---list_partitions---\n");
1294 print_partition_table();
1296 /* current_mtd_dev is not NULL only when we have non empty device list */
1297 if (current_mtd_dev) {
1298 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1300 printf("\nactive partition: %s%d,%d - (%s) 0x%08x @ 0x%08x\n",
1301 MTD_DEV_TYPE(current_mtd_dev->id->type),
1302 current_mtd_dev->id->num, current_mtd_partnum,
1303 part->name, part->size, part->offset);
1305 printf("could not get current partition info\n\n");
1309 printf("\ndefaults:\n");
1310 printf("mtdids : %s\n",
1311 mtdids_default ? mtdids_default : "none");
1313 * Using printf() here results in printbuffer overflow
1314 * if default mtdparts string is greater than console
1315 * printbuffer. Use puts() to prevent system crashes.
1318 puts(mtdparts_default ? mtdparts_default : "none");
1323 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1324 * corresponding device and verify partition number.
1326 * @param id string describing device and partition or partition name
1327 * @param dev pointer to the requested device (output)
1328 * @param part_num verified partition number (output)
1329 * @param part pointer to requested partition (output)
1330 * @return 0 on success, 1 otherwise
1332 int find_dev_and_part(const char *id, struct mtd_device **dev,
1333 u8 *part_num, struct part_info **part)
1335 struct list_head *dentry, *pentry;
1336 u8 type, dnum, pnum;
1339 debug("--- find_dev_and_part ---\nid = %s\n", id);
1341 list_for_each(dentry, &devices) {
1343 *dev = list_entry(dentry, struct mtd_device, link);
1344 list_for_each(pentry, &(*dev)->parts) {
1345 *part = list_entry(pentry, struct part_info, link);
1346 if (strcmp((*part)->name, id) == 0)
1357 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1360 if ((*p++ != ',') || (*p == '\0')) {
1361 printf("no partition number specified\n");
1364 pnum = simple_strtoul(p, (char **)&p, 0);
1366 printf("unexpected trailing character '%c'\n", *p);
1370 if ((*dev = device_find(type, dnum)) == NULL) {
1371 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1375 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1376 printf("no such partition\n");
1387 * Find and delete partition. For partition id format see find_dev_and_part().
1389 * @param id string describing device and partition
1390 * @return 0 on success, 1 otherwise
1392 static int delete_partition(const char *id)
1395 struct mtd_device *dev;
1396 struct part_info *part;
1398 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1400 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08x@0x%08x\n",
1401 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1402 part->name, part->size, part->offset);
1404 if (part_del(dev, part) != 0)
1407 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1408 printf("generated mtdparts too long, resetting to null\n");
1414 printf("partition %s not found\n", id);
1418 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1420 * Increase the size of the given partition so that it's net size is at least
1421 * as large as the size member and such that the next partition would start on a
1422 * good block if it were adjacent to this partition.
1424 * @param mtd the mtd device
1425 * @param part the partition
1426 * @param next_offset pointer to the offset of the next partition after this
1427 * partition's size has been modified (output)
1429 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1430 uint64_t *next_offset)
1432 uint64_t net_size, padding_size = 0;
1435 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1439 * Absorb bad blocks immediately following this
1440 * partition also into the partition, such that
1441 * the next partition starts with a good block.
1444 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1445 mtd->erasesize, &padding_size, &truncated);
1449 padding_size -= mtd->erasesize;
1453 printf("truncated partition %s to %lld bytes\n", part->name,
1454 (uint64_t) net_size + padding_size);
1457 part->size = net_size + padding_size;
1458 *next_offset = part->offset + part->size;
1462 * Adjust all of the partition sizes, such that all partitions are at least
1463 * as big as their mtdparts environment variable sizes and they each start
1466 * @return 0 on success, 1 otherwise
1468 static int spread_partitions(void)
1470 struct list_head *dentry, *pentry;
1471 struct mtd_device *dev;
1472 struct part_info *part;
1473 struct mtd_info *mtd;
1477 list_for_each(dentry, &devices) {
1478 dev = list_entry(dentry, struct mtd_device, link);
1480 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1485 list_for_each(pentry, &dev->parts) {
1486 part = list_entry(pentry, struct part_info, link);
1488 debug("spread_partitions: device = %s%d, partition %d ="
1489 " (%s) 0x%08x@0x%08x\n",
1490 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1491 part_num, part->name, part->size,
1494 if (cur_offs > part->offset)
1495 part->offset = cur_offs;
1497 spread_partition(mtd, part, &cur_offs);
1505 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1506 printf("generated mtdparts too long, resetting to null\n");
1511 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1514 * Accept character string describing mtd partitions and call device_parse()
1515 * for each entry. Add created devices to the global devices list.
1517 * @param mtdparts string specifing mtd partitions
1518 * @return 0 on success, 1 otherwise
1520 static int parse_mtdparts(const char *const mtdparts)
1522 const char *p = mtdparts;
1523 struct mtd_device *dev;
1525 char tmp_parts[MTDPARTS_MAXLEN];
1527 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", p);
1529 /* delete all devices and partitions */
1530 if (mtd_devices_init() != 0) {
1531 printf("could not initialise device list\n");
1535 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1536 if (gd->flags & GD_FLG_ENV_READY) {
1537 p = getenv("mtdparts");
1540 getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1543 if (strncmp(p, "mtdparts=", 9) != 0) {
1544 printf("mtdparts variable doesn't start with 'mtdparts='\n");
1549 while (p && (*p != '\0')) {
1551 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1554 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1555 dev->id->num, dev->id->mtd_id);
1557 /* check if parsed device is already on the list */
1558 if (device_find(dev->id->type, dev->id->num) != NULL) {
1559 printf("device %s%d redefined, please correct mtdparts variable\n",
1560 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1564 list_add_tail(&dev->link, &devices);
1568 device_delall(&devices);
1576 * Parse provided string describing mtdids mapping (see file header for mtdids
1577 * variable format). Allocate memory for each entry and add all found entries
1578 * to the global mtdids list.
1580 * @param ids mapping string
1581 * @return 0 on success, 1 otherwise
1583 static int parse_mtdids(const char *const ids)
1585 const char *p = ids;
1589 struct list_head *entry, *n;
1590 struct mtdids *id_tmp;
1595 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1597 /* clean global mtdids list */
1598 list_for_each_safe(entry, n, &mtdids) {
1599 id_tmp = list_entry(entry, struct mtdids, link);
1600 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1605 INIT_LIST_HEAD(&mtdids);
1607 while(p && (*p != '\0')) {
1610 /* parse 'nor'|'nand'|'onenand'<dev-num> */
1611 if (mtd_id_parse(p, &p, &type, &num) != 0)
1615 printf("mtdids: incorrect <dev-num>\n");
1620 /* check if requested device exists */
1621 if (mtd_device_validate(type, num, &size) != 0)
1624 /* locate <mtd-id> */
1626 if ((p = strchr(mtd_id, ',')) != NULL) {
1627 mtd_id_len = p - mtd_id + 1;
1630 mtd_id_len = strlen(mtd_id) + 1;
1632 if (mtd_id_len == 0) {
1633 printf("mtdids: no <mtd-id> identifier\n");
1637 /* check if this id is already on the list */
1638 int double_entry = 0;
1639 list_for_each(entry, &mtdids) {
1640 id_tmp = list_entry(entry, struct mtdids, link);
1641 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1647 printf("device id %s%d redefined, please correct mtdids variable\n",
1648 MTD_DEV_TYPE(type), num);
1652 /* allocate mtdids structure */
1653 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1654 printf("out of memory\n");
1657 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1661 id->mtd_id = (char *)(id + 1);
1662 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1663 id->mtd_id[mtd_id_len - 1] = '\0';
1664 INIT_LIST_HEAD(&id->link);
1666 debug("+ id %s%d\t%16d bytes\t%s\n",
1667 MTD_DEV_TYPE(id->type), id->num,
1668 id->size, id->mtd_id);
1670 list_add_tail(&id->link, &mtdids);
1674 /* clean mtdids list and free allocated memory */
1675 list_for_each_safe(entry, n, &mtdids) {
1676 id_tmp = list_entry(entry, struct mtdids, link);
1687 * Parse and initialize global mtdids mapping and create global
1688 * device/partition list.
1690 * @return 0 on success, 1 otherwise
1692 int mtdparts_init(void)
1694 static int initialized = 0;
1695 const char *ids, *parts;
1696 const char *current_partition;
1698 char tmp_ep[PARTITION_MAXLEN];
1699 char tmp_parts[MTDPARTS_MAXLEN];
1701 debug("\n---mtdparts_init---\n");
1703 INIT_LIST_HEAD(&mtdids);
1704 INIT_LIST_HEAD(&devices);
1705 memset(last_ids, 0, MTDIDS_MAXLEN);
1706 memset(last_parts, 0, MTDPARTS_MAXLEN);
1707 memset(last_partition, 0, PARTITION_MAXLEN);
1712 ids = getenv("mtdids");
1714 * The mtdparts variable tends to be long. If we need to access it
1715 * before the env is relocated, then we need to use our own stack
1716 * buffer. gd->env_buf will be too small.
1718 if (gd->flags & GD_FLG_ENV_READY) {
1719 parts = getenv("mtdparts");
1722 getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN);
1724 current_partition = getenv("partition");
1726 /* save it for later parsing, cannot rely on current partition pointer
1727 * as 'partition' variable may be updated during init */
1729 if (current_partition)
1730 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1732 debug("last_ids : %s\n", last_ids);
1733 debug("env_ids : %s\n", ids);
1734 debug("last_parts: %s\n", last_parts);
1735 debug("env_parts : %s\n\n", parts);
1737 debug("last_partition : %s\n", last_partition);
1738 debug("env_partition : %s\n", current_partition);
1740 /* if mtdids varible is empty try to use defaults */
1742 if (mtdids_default) {
1743 debug("mtdids variable not defined, using default\n");
1744 ids = mtdids_default;
1745 setenv("mtdids", (char *)ids);
1747 printf("mtdids not defined, no default present\n");
1751 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1752 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1756 /* do no try to use defaults when mtdparts variable is not defined,
1757 * just check the length */
1759 printf("mtdparts variable not set, see 'help mtdparts'\n");
1761 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1762 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1766 /* check if we have already parsed those mtdids */
1767 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1772 if (parse_mtdids(ids) != 0) {
1777 /* ok it's good, save new ids */
1778 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1781 /* parse partitions if either mtdparts or mtdids were updated */
1782 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1783 if (parse_mtdparts(parts) != 0)
1786 if (list_empty(&devices)) {
1787 printf("mtdparts_init: no valid partitions\n");
1791 /* ok it's good, save new parts */
1792 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1794 /* reset first partition from first dev from the list as current */
1795 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1796 current_mtd_partnum = 0;
1799 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1800 MTD_DEV_TYPE(current_mtd_dev->id->type),
1801 current_mtd_dev->id->num, current_mtd_partnum);
1804 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1805 if (!parts && (last_parts[0] != '\0'))
1806 return mtd_devices_init();
1808 /* do not process current partition if mtdparts variable is null */
1812 /* is current partition set in environment? if so, use it */
1813 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1814 struct part_info *p;
1815 struct mtd_device *cdev;
1818 debug("--- getting current partition: %s\n", tmp_ep);
1820 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1821 current_mtd_dev = cdev;
1822 current_mtd_partnum = pnum;
1825 } else if (getenv("partition") == NULL) {
1826 debug("no partition variable set, setting...\n");
1834 * Return pointer to the partition of a requested number from a requested
1837 * @param dev device that is to be searched for a partition
1838 * @param part_num requested partition number
1839 * @return pointer to the part_info, NULL otherwise
1841 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1843 struct list_head *entry;
1844 struct part_info *part;
1850 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1851 part_num, MTD_DEV_TYPE(dev->id->type),
1852 dev->id->num, dev->id->mtd_id);
1854 if (part_num >= dev->num_parts) {
1855 printf("invalid 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);
1861 /* locate partition number, return it */
1863 list_for_each(entry, &dev->parts) {
1864 part = list_entry(entry, struct part_info, link);
1866 if (part_num == num++) {
1874 /***************************************************/
1875 /* U-boot commands */
1876 /***************************************************/
1877 /* command line only */
1879 * Routine implementing u-boot chpart command. Sets new current partition based
1880 * on the user supplied partition id. For partition id format see find_dev_and_part().
1882 * @param cmdtp command internal data
1883 * @param flag command flag
1884 * @param argc number of arguments supplied to the command
1885 * @param argv arguments list
1886 * @return 0 on success, 1 otherwise
1888 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1890 /* command line only */
1891 struct mtd_device *dev;
1892 struct part_info *part;
1895 if (mtdparts_init() !=0)
1899 printf("no partition id specified\n");
1903 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1906 current_mtd_dev = dev;
1907 current_mtd_partnum = pnum;
1910 printf("partition changed to %s%d,%d\n",
1911 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1917 * Routine implementing u-boot mtdparts command. Initialize/update default global
1918 * partition list and process user partition request (list, add, del).
1920 * @param cmdtp command internal data
1921 * @param flag command flag
1922 * @param argc number of arguments supplied to the command
1923 * @param argv arguments list
1924 * @return 0 on success, 1 otherwise
1926 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1927 char * const argv[])
1930 if (strcmp(argv[1], "default") == 0) {
1931 setenv("mtdids", (char *)mtdids_default);
1932 setenv("mtdparts", (char *)mtdparts_default);
1933 setenv("partition", NULL);
1937 } else if (strcmp(argv[1], "delall") == 0) {
1938 /* this may be the first run, initialize lists if needed */
1941 setenv("mtdparts", NULL);
1943 /* mtd_devices_init() calls current_save() */
1944 return mtd_devices_init();
1948 /* make sure we are in sync with env variables */
1949 if (mtdparts_init() != 0)
1957 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1958 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1959 #define PART_ADD_DESC_MAXLEN 64
1960 char tmpbuf[PART_ADD_DESC_MAXLEN];
1961 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1962 struct mtd_info *mtd;
1963 uint64_t next_offset;
1966 struct mtd_device *dev;
1967 struct mtd_device *dev_tmp;
1969 struct part_info *p;
1971 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
1974 if ((id = id_find(type, num)) == NULL) {
1975 printf("no such device %s defined in mtdids variable\n", argv[2]);
1979 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
1980 len += strlen(argv[3]); /* size@offset */
1981 len += strlen(argv[4]) + 2; /* '(' name ')' */
1982 if (argv[5] && (strlen(argv[5]) == 2))
1983 len += 2; /* 'ro' */
1985 if (len >= PART_ADD_DESC_MAXLEN) {
1986 printf("too long partition description\n");
1989 sprintf(tmpbuf, "%s:%s(%s)%s",
1990 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
1991 debug("add tmpbuf: %s\n", tmpbuf);
1993 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
1996 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1997 dev->id->num, dev->id->mtd_id);
1999 p = list_entry(dev->parts.next, struct part_info, link);
2001 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2002 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2005 if (!strcmp(&argv[1][3], ".spread")) {
2006 spread_partition(mtd, p, &next_offset);
2007 debug("increased %s to %d bytes\n", p->name, p->size);
2011 dev_tmp = device_find(dev->id->type, dev->id->num);
2012 if (dev_tmp == NULL) {
2014 } else if (part_add(dev_tmp, p) != 0) {
2015 /* merge new partition with existing ones*/
2020 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2021 printf("generated mtdparts too long, resetting to null\n");
2028 /* mtdparts del part-id */
2029 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2030 debug("del: part-id = %s\n", argv[2]);
2032 return delete_partition(argv[2]);
2035 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2036 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2037 return spread_partitions();
2038 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2040 return CMD_RET_USAGE;
2043 /***************************************************/
2045 chpart, 2, 0, do_chpart,
2046 "change active partition",
2048 " - change active partition (e.g. part-id = nand0,1)"
2051 #ifdef CONFIG_SYS_LONGHELP
2052 static char mtdparts_help_text[] =
2054 " - list partition table\n"
2056 " - delete all partitions\n"
2057 "mtdparts del part-id\n"
2058 " - delete partition (e.g. part-id = nand0,1)\n"
2059 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2060 " - add partition\n"
2061 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2062 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2063 " - add partition, padding size by skipping bad blocks\n"
2065 "mtdparts default\n"
2066 " - reset partition table to defaults\n"
2067 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2069 " - adjust the sizes of the partitions so they are\n"
2070 " at least as big as the mtdparts variable specifies\n"
2071 " and they each start on a good block\n\n"
2074 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2076 "this command uses three environment variables:\n\n"
2077 "'partition' - keeps current partition identifier\n\n"
2078 "partition := <part-id>\n"
2079 "<part-id> := <dev-id>,part_num\n\n"
2080 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2081 "mtdids=<idmap>[,<idmap>,...]\n\n"
2082 "<idmap> := <dev-id>=<mtd-id>\n"
2083 "<dev-id> := 'nand'|'nor'|'onenand'<dev-num>\n"
2084 "<dev-num> := mtd device number, 0...\n"
2085 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2086 "'mtdparts' - partition list\n\n"
2087 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2088 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2089 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2090 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2091 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2092 "<offset> := partition start offset within the device\n"
2093 "<name> := '(' NAME ')'\n"
2094 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2098 mtdparts, 6, 0, do_mtdparts,
2099 "define flash/nand partitions", mtdparts_help_text
2101 /***************************************************/