1 // SPDX-License-Identifier: GPL-2.0+
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
10 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
13 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
15 * Added support for reading flash partition table from environment.
16 * Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
20 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
22 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
23 * Copyright 2002 SYSGO Real-Time Solutions GmbH
27 * Three environment variables are used by the parsing routines:
29 * 'partition' - keeps current partition identifier
31 * partition := <part-id>
32 * <part-id> := <dev-id>,part_num
35 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
37 * mtdids=<idmap>[,<idmap>,...]
39 * <idmap> := <dev-id>=<mtd-id>
40 * <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>
41 * <dev-num> := mtd device number, 0...
42 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
45 * 'mtdparts' - partition list
47 * mtdparts=[mtdparts=]<mtd-def>[;<mtd-def>...]
49 * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
50 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
51 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
52 * <size> := standard linux memsize OR '-' to denote all remaining space
53 * <offset> := partition start offset within the device
54 * <name> := '(' NAME ')'
55 * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
58 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
59 * - if the above variables are not set defaults for a given target are used
63 * 1 NOR Flash, with 1 single writable partition:
64 * mtdids=nor0=edb7312-nor
65 * mtdparts=[mtdparts=]edb7312-nor:-
67 * 1 NOR Flash with 2 partitions, 1 NAND with one
68 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
69 * mtdparts=[mtdparts=]edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
77 #include <asm/global_data.h>
78 #include <jffs2/load_kernel.h>
79 #include <linux/list.h>
80 #include <linux/ctype.h>
81 #include <linux/err.h>
82 #include <linux/mtd/mtd.h>
84 #if defined(CONFIG_CMD_NAND)
85 #include <linux/mtd/rawnand.h>
89 #if defined(CONFIG_CMD_ONENAND)
90 #include <linux/mtd/onenand.h>
91 #include <onenand_uboot.h>
94 DECLARE_GLOBAL_DATA_PTR;
96 /* special size referring to all the remaining space in a partition */
97 #define SIZE_REMAINING (~0llu)
99 /* special offset value, it is used when not provided by user
101 * this value is used temporarily during parsing, later such offests
102 * are recalculated */
103 #define OFFSET_NOT_SPECIFIED (~0llu)
105 /* minimum partition size */
106 #define MIN_PART_SIZE 4096
108 /* this flag needs to be set in part_info struct mask_flags
109 * field for read-only partitions */
110 #define MTD_WRITEABLE_CMD 1
112 /* default values for mtdids and mtdparts variables */
113 #ifdef CONFIG_MTDIDS_DEFAULT
114 #define MTDIDS_DEFAULT CONFIG_MTDIDS_DEFAULT
116 #define MTDIDS_DEFAULT NULL
118 #ifdef CONFIG_MTDPARTS_DEFAULT
119 #define MTDPARTS_DEFAULT CONFIG_MTDPARTS_DEFAULT
121 #define MTDPARTS_DEFAULT NULL
124 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
125 extern void board_mtdparts_default(const char **mtdids, const char **mtdparts);
127 static const char *mtdids_default = MTDIDS_DEFAULT;
128 static const char *mtdparts_default = MTDPARTS_DEFAULT;
130 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
131 #define MTDIDS_MAXLEN 128
132 #define MTDPARTS_MAXLEN 512
133 #define PARTITION_MAXLEN 16
134 static char last_ids[MTDIDS_MAXLEN + 1];
135 static char last_parts[MTDPARTS_MAXLEN + 1];
136 static char last_partition[PARTITION_MAXLEN + 1];
138 /* low level jffs2 cache cleaning routine */
139 extern void jffs2_free_cache(struct part_info *part);
141 /* mtdids mapping list, filled by parse_ids() */
142 static struct list_head mtdids;
144 /* device/partition list, parse_cmdline() parses into here */
145 static struct list_head devices;
147 /* current active device and partition number */
148 struct mtd_device *current_mtd_dev = NULL;
149 u8 current_mtd_partnum = 0;
153 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
155 /* command line only routines */
156 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len);
157 static int device_del(struct mtd_device *dev);
160 * Parses a string into a number. The number stored at ptr is
161 * potentially suffixed with K (for kilobytes, or 1024 bytes),
162 * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
163 * 1073741824). If the number is suffixed with K, M, or G, then
164 * the return value is the number multiplied by one kilobyte, one
165 * megabyte, or one gigabyte, respectively.
167 * @param ptr where parse begins
168 * @param retptr output pointer to next char after parse completes (output)
169 * Return: resulting unsigned int
171 static u64 memsize_parse (const char *const ptr, const char **retptr)
173 u64 ret = simple_strtoull(ptr, (char **)retptr, 0);
197 * Format string describing supplied size. This routine does the opposite job
198 * to memsize_parse(). Size in bytes is converted to string and if possible
199 * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
201 * Note, that this routine does not check for buffer overflow, it's the caller
202 * who must assure enough space.
204 * @param buf output buffer
205 * @param size size to be converted to string
207 static void memsize_format(char *buf, u64 size)
209 #define SIZE_GB ((u32)1024*1024*1024)
210 #define SIZE_MB ((u32)1024*1024)
211 #define SIZE_KB ((u32)1024)
213 if ((size % SIZE_GB) == 0)
214 sprintf(buf, "%llug", size/SIZE_GB);
215 else if ((size % SIZE_MB) == 0)
216 sprintf(buf, "%llum", size/SIZE_MB);
217 else if (size % SIZE_KB == 0)
218 sprintf(buf, "%lluk", size/SIZE_KB);
220 sprintf(buf, "%llu", size);
224 * This routine does global indexing of all partitions. Resulting index for
225 * current partition is saved in 'mtddevnum'. Current partition name in
228 static void index_partitions(void)
231 struct part_info *part;
232 struct list_head *dentry;
233 struct mtd_device *dev;
235 debug("--- index partitions ---\n");
237 if (current_mtd_dev) {
239 list_for_each(dentry, &devices) {
240 dev = list_entry(dentry, struct mtd_device, link);
241 if (dev == current_mtd_dev) {
242 mtddevnum += current_mtd_partnum;
243 env_set_ulong("mtddevnum", mtddevnum);
244 debug("=> mtddevnum %d,\n", mtddevnum);
247 mtddevnum += dev->num_parts;
250 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
252 env_set("mtddevname", part->name);
254 debug("=> mtddevname %s\n", part->name);
256 env_set("mtddevname", NULL);
258 debug("=> mtddevname NULL\n");
261 env_set("mtddevnum", NULL);
262 env_set("mtddevname", NULL);
264 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
269 * Save current device and partition in environment variable 'partition'.
271 static void current_save(void)
275 debug("--- current_save ---\n");
277 if (current_mtd_dev) {
278 sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type),
279 current_mtd_dev->id->num, current_mtd_partnum);
281 env_set("partition", buf);
282 strncpy(last_partition, buf, 16);
284 debug("=> partition %s\n", buf);
286 env_set("partition", NULL);
287 last_partition[0] = '\0';
289 debug("=> partition NULL\n");
295 * Produce a mtd_info given a type and num.
297 * @param type mtd type
298 * @param num mtd number
299 * @param mtd a pointer to an mtd_info instance (output)
300 * Return: 0 if device is valid, 1 otherwise
302 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
306 sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
307 *mtd = get_mtd_device_nm(mtd_dev);
309 printf("Device %s not found!\n", mtd_dev);
312 put_mtd_device(*mtd);
318 * Performs sanity check for supplied flash partition.
319 * Table of existing MTD flash devices is searched and partition device
320 * is located. Alignment with the granularity of nand erasesize is verified.
322 * @param id of the parent device
323 * @param part partition to validate
324 * Return: 0 if partition is valid, 1 otherwise
326 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
328 struct mtd_info *mtd = NULL;
333 if (get_mtd_info(id->type, id->num, &mtd))
336 part->sector_size = mtd->erasesize;
338 if (!mtd->numeraseregions) {
340 * Only one eraseregion (NAND, SPI-NAND, OneNAND or uniform NOR),
341 * checking for alignment is easy here
343 offset = part->offset;
344 if (do_div(offset, mtd->erasesize)) {
345 printf("%s%d: partition (%s) start offset"
346 "alignment incorrect\n",
347 MTD_DEV_TYPE(id->type), id->num, part->name);
352 if (do_div(size, mtd->erasesize)) {
353 printf("%s%d: partition (%s) size alignment incorrect\n",
354 MTD_DEV_TYPE(id->type), id->num, part->name);
359 * Multiple eraseregions (non-uniform NOR),
360 * checking for alignment is more complex here
363 /* Check start alignment */
364 for (i = 0; i < mtd->numeraseregions; i++) {
365 start = mtd->eraseregions[i].offset;
366 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
367 if (part->offset == start)
369 start += mtd->eraseregions[i].erasesize;
373 printf("%s%d: partition (%s) start offset alignment incorrect\n",
374 MTD_DEV_TYPE(id->type), id->num, part->name);
379 /* Check end/size alignment */
380 for (i = 0; i < mtd->numeraseregions; i++) {
381 start = mtd->eraseregions[i].offset;
382 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
383 if ((part->offset + part->size) == start)
385 start += mtd->eraseregions[i].erasesize;
388 /* Check last sector alignment */
389 if ((part->offset + part->size) == start)
392 printf("%s%d: partition (%s) size alignment incorrect\n",
393 MTD_DEV_TYPE(id->type), id->num, part->name);
404 * Performs sanity check for supplied partition. Offset and size are
405 * verified to be within valid range. Partition type is checked and
406 * part_validate_eraseblock() is called with the argument of part.
408 * @param id of the parent device
409 * @param part partition to validate
410 * Return: 0 if partition is valid, 1 otherwise
412 static int part_validate(struct mtdids *id, struct part_info *part)
414 if (part->size == SIZE_REMAINING)
415 part->size = id->size - part->offset;
417 if (part->offset > id->size) {
418 printf("%s: offset %08llx beyond flash size %08llx\n",
419 id->mtd_id, part->offset, id->size);
423 if ((part->offset + part->size) <= part->offset) {
424 printf("%s%d: partition (%s) size too big\n",
425 MTD_DEV_TYPE(id->type), id->num, part->name);
429 if (part->offset + part->size > id->size) {
430 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
435 * Now we need to check if the partition starts and ends on
436 * sector (eraseblock) regions
438 return part_validate_eraseblock(id, part);
442 * Delete selected partition from the partition list of the specified device.
444 * @param dev device to delete partition from
445 * @param part partition to delete
446 * Return: 0 on success, 1 otherwise
448 static int part_del(struct mtd_device *dev, struct part_info *part)
450 u8 current_save_needed = 0;
452 /* if there is only one partition, remove whole device */
453 if (dev->num_parts == 1)
454 return device_del(dev);
456 /* otherwise just delete this partition */
458 if (dev == current_mtd_dev) {
459 /* we are modyfing partitions for the current device,
461 struct part_info *curr_pi;
462 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
465 if (curr_pi == part) {
466 printf("current partition deleted, resetting current to 0\n");
467 current_mtd_partnum = 0;
468 } else if (part->offset <= curr_pi->offset) {
469 current_mtd_partnum--;
471 current_save_needed = 1;
475 list_del(&part->link);
479 if (current_save_needed > 0)
488 * Delete all partitions from parts head list, free memory.
490 * @param head list of partitions to delete
492 static void part_delall(struct list_head *head)
494 struct list_head *entry, *n;
495 struct part_info *part_tmp;
497 /* clean tmp_list and free allocated memory */
498 list_for_each_safe(entry, n, head) {
499 part_tmp = list_entry(entry, struct part_info, link);
507 * Add new partition to the supplied partition list. Make sure partitions are
508 * sorted by offset in ascending order.
510 * @param head list this partition is to be added to
511 * @param new partition to be added
513 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
515 struct list_head *entry;
516 struct part_info *new_pi, *curr_pi;
518 /* link partition to parrent dev */
521 if (list_empty(&dev->parts)) {
522 debug("part_sort_add: list empty\n");
523 list_add(&part->link, &dev->parts);
529 new_pi = list_entry(&part->link, struct part_info, link);
531 /* get current partition info if we are updating current device */
533 if (dev == current_mtd_dev)
534 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
536 list_for_each(entry, &dev->parts) {
537 struct part_info *pi;
539 pi = list_entry(entry, struct part_info, link);
541 /* be compliant with kernel cmdline, allow only one partition at offset zero */
542 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
543 printf("cannot add second partition at offset 0\n");
547 if (new_pi->offset <= pi->offset) {
548 list_add_tail(&part->link, entry);
551 if (curr_pi && (pi->offset <= curr_pi->offset)) {
552 /* we are modyfing partitions for the current
553 * device, update current */
554 current_mtd_partnum++;
563 list_add_tail(&part->link, &dev->parts);
570 * Add provided partition to the partition list of a given device.
572 * @param dev device to which partition is added
573 * @param part partition to be added
574 * Return: 0 on success, 1 otherwise
576 static int part_add(struct mtd_device *dev, struct part_info *part)
578 /* verify alignment and size */
579 if (part_validate(dev->id, part) != 0)
582 /* partition is ok, add it to the list */
583 if (part_sort_add(dev, part) != 0)
590 * Parse one partition definition, allocate memory and return pointer to this
591 * location in retpart.
593 * @param partdef pointer to the partition definition string i.e. <part-def>
594 * @param ret output pointer to next char after parse completes (output)
595 * @param retpart pointer to the allocated partition (output)
596 * Return: 0 on success, 1 otherwise
598 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
600 struct part_info *part;
605 unsigned int mask_flags;
612 /* fetch the partition size */
614 /* assign all remaining space to this partition */
615 debug("'-': remaining size assigned\n");
616 size = SIZE_REMAINING;
619 size = memsize_parse(p, &p);
620 if (size < MIN_PART_SIZE) {
621 printf("partition size too small (%llx)\n", size);
626 /* check for offset */
627 offset = OFFSET_NOT_SPECIFIED;
630 offset = memsize_parse(p, &p);
633 /* now look for the name */
636 if ((p = strchr(name, ')')) == NULL) {
637 printf("no closing ) found in partition name\n");
640 name_len = p - name + 1;
641 if ((name_len - 1) == 0) {
642 printf("empty partition name\n");
647 /* 0x00000000@0x00000000 */
652 /* test for options */
654 if (strncmp(p, "ro", 2) == 0) {
655 mask_flags |= MTD_WRITEABLE_CMD;
659 /* check for next partition definition */
661 if (size == SIZE_REMAINING) {
663 printf("no partitions allowed after a fill-up partition\n");
667 } else if ((*p == ';') || (*p == '\0')) {
670 printf("unexpected character '%c' at the end of partition\n", *p);
675 /* allocate memory */
676 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
678 printf("out of memory\n");
681 memset(part, 0, sizeof(struct part_info) + name_len);
683 part->offset = offset;
684 part->mask_flags = mask_flags;
685 part->name = (char *)(part + 1);
688 /* copy user provided name */
689 strncpy(part->name, name, name_len - 1);
692 /* auto generated name in form of size@offset */
693 snprintf(part->name, name_len, "0x%08llx@0x%08llx", size, offset);
697 part->name[name_len - 1] = '\0';
698 INIT_LIST_HEAD(&part->link);
700 debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx mask flags %d\n",
701 part->name, part->size,
702 part->offset, part->mask_flags);
709 * Check device number to be within valid range for given device type.
711 * @param type mtd type
712 * @param num mtd number
713 * @param size a pointer to the size of the mtd device (output)
714 * Return: 0 if device is valid, 1 otherwise
716 static int mtd_device_validate(u8 type, u8 num, u64 *size)
718 struct mtd_info *mtd = NULL;
720 if (get_mtd_info(type, num, &mtd))
729 * Delete all mtd devices from a supplied devices list, free memory allocated for
730 * each device and delete all device partitions.
732 * Return: 0 on success, 1 otherwise
734 static int device_delall(struct list_head *head)
736 struct list_head *entry, *n;
737 struct mtd_device *dev_tmp;
739 /* clean devices list */
740 list_for_each_safe(entry, n, head) {
741 dev_tmp = list_entry(entry, struct mtd_device, link);
743 part_delall(&dev_tmp->parts);
746 INIT_LIST_HEAD(&devices);
752 * If provided device exists it's partitions are deleted, device is removed
753 * from device list and device memory is freed.
755 * @param dev device to be deleted
756 * Return: 0 on success, 1 otherwise
758 static int device_del(struct mtd_device *dev)
760 part_delall(&dev->parts);
761 list_del(&dev->link);
764 if (dev == current_mtd_dev) {
765 /* we just deleted current device */
766 if (list_empty(&devices)) {
767 current_mtd_dev = NULL;
769 /* reset first partition from first dev from the
770 * devices list as current */
771 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
772 current_mtd_partnum = 0;
783 * Search global device list and return pointer to the device of type and num
786 * @param type device type
787 * @param num device number
788 * Return: NULL if requested device does not exist
790 struct mtd_device *device_find(u8 type, u8 num)
792 struct list_head *entry;
793 struct mtd_device *dev_tmp;
795 list_for_each(entry, &devices) {
796 dev_tmp = list_entry(entry, struct mtd_device, link);
798 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
806 * Add specified device to the global device list.
808 * @param dev device to be added
810 static void device_add(struct mtd_device *dev)
812 u8 current_save_needed = 0;
814 if (list_empty(&devices)) {
815 current_mtd_dev = dev;
816 current_mtd_partnum = 0;
817 current_save_needed = 1;
820 list_add_tail(&dev->link, &devices);
822 if (current_save_needed > 0)
829 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
830 * return pointer to the device structure.
832 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
833 * @param ret output pointer to next char after parse completes (output)
834 * @param retdev pointer to the allocated device (output)
835 * Return: 0 on success, 1 otherwise
837 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
839 struct mtd_device *dev;
840 struct part_info *part;
843 unsigned int mtd_id_len;
847 struct list_head *entry, *n;
852 debug("===device_parse===\n");
861 mtd_id = p = mtd_dev;
862 if (!(p = strchr(mtd_id, ':'))) {
863 printf("no <mtd-id> identifier\n");
866 mtd_id_len = p - mtd_id + 1;
869 /* verify if we have a valid device specified */
870 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
871 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
875 pend = strchr(p, ';');
876 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
877 id->type, MTD_DEV_TYPE(id->type),
878 id->num, id->mtd_id);
879 debug("parsing partitions %.*s\n", (int)(pend ? pend - p : strlen(p)), p);
881 /* parse partitions */
885 if ((dev = device_find(id->type, id->num)) != NULL) {
886 /* if device already exists start at the end of the last partition */
887 part = list_entry(dev->parts.prev, struct part_info, link);
888 offset = part->offset + part->size;
891 while (p && (*p != '\0') && (*p != ';')) {
893 if ((part_parse(p, &p, &part) != 0) || (!part))
896 /* calculate offset when not specified */
897 if (part->offset == OFFSET_NOT_SPECIFIED)
898 part->offset = offset;
900 offset = part->offset;
902 /* verify alignment and size */
903 if (part_validate(id, part) != 0)
906 offset += part->size;
908 /* partition is ok, add it to the list */
909 list_add_tail(&part->link, &tmp_list);
914 part_delall(&tmp_list);
918 debug("\ntotal partitions: %d\n", num_parts);
920 /* check for next device presence */
925 } else if (*p == '\0') {
929 printf("unexpected character '%c' at the end of device\n", *p);
936 /* allocate memory for mtd_device structure */
937 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
938 printf("out of memory\n");
941 memset(dev, 0, sizeof(struct mtd_device));
943 dev->num_parts = 0; /* part_sort_add increments num_parts */
944 INIT_LIST_HEAD(&dev->parts);
945 INIT_LIST_HEAD(&dev->link);
947 /* move partitions from tmp_list to dev->parts */
948 list_for_each_safe(entry, n, &tmp_list) {
949 part = list_entry(entry, struct part_info, link);
951 if (part_sort_add(dev, part) != 0) {
964 * Initialize global device list.
966 * Return: 0 on success, 1 otherwise
968 static int mtd_devices_init(void)
970 last_parts[0] = '\0';
971 current_mtd_dev = NULL;
974 return device_delall(&devices);
978 * Search global mtdids list and find id of requested type and number.
980 * Return: pointer to the id if it exists, NULL otherwise
982 static struct mtdids* id_find(u8 type, u8 num)
984 struct list_head *entry;
987 list_for_each(entry, &mtdids) {
988 id = list_entry(entry, struct mtdids, link);
990 if ((id->type == type) && (id->num == num))
998 * Search global mtdids list and find id of a requested mtd_id.
1000 * Note: first argument is not null terminated.
1002 * @param mtd_id string containing requested mtd_id
1003 * @param mtd_id_len length of supplied mtd_id
1004 * Return: pointer to the id if it exists, NULL otherwise
1006 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
1008 struct list_head *entry;
1011 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1012 mtd_id_len, mtd_id, mtd_id_len);
1014 list_for_each(entry, &mtdids) {
1015 id = list_entry(entry, struct mtdids, link);
1017 debug("entry: '%s' (len = %zu)\n",
1018 id->mtd_id, strlen(id->mtd_id));
1020 if (mtd_id_len != strlen(id->mtd_id))
1022 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1030 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>,
1031 * return device type and number.
1033 * @param id string describing device id
1034 * @param ret_id output pointer to next char after parse completes (output)
1035 * @param dev_type parsed device type (output)
1036 * @param dev_num parsed device number (output)
1037 * Return: 0 on success, 1 otherwise
1039 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1045 if (strncmp(p, "nand", 4) == 0) {
1046 *dev_type = MTD_DEV_TYPE_NAND;
1048 } else if (strncmp(p, "nor", 3) == 0) {
1049 *dev_type = MTD_DEV_TYPE_NOR;
1051 } else if (strncmp(p, "onenand", 7) == 0) {
1052 *dev_type = MTD_DEV_TYPE_ONENAND;
1054 } else if (strncmp(p, "spi-nand", 8) == 0) {
1055 *dev_type = MTD_DEV_TYPE_SPINAND;
1058 printf("incorrect device type in %s\n", id);
1063 printf("incorrect device number in %s\n", id);
1067 *dev_num = simple_strtoul(p, (char **)&p, 0);
1074 * Process all devices and generate corresponding mtdparts string describing
1075 * all partitions on all devices.
1077 * @param buf output buffer holding generated mtdparts string (output)
1078 * @param buflen buffer size
1079 * Return: 0 on success, 1 otherwise
1081 static int generate_mtdparts(char *buf, u32 buflen)
1083 struct list_head *pentry, *dentry;
1084 struct mtd_device *dev;
1085 struct part_info *part, *prev_part;
1090 u32 maxlen = buflen - 1;
1092 debug("--- generate_mtdparts ---\n");
1094 if (list_empty(&devices)) {
1099 list_for_each(dentry, &devices) {
1100 dev = list_entry(dentry, struct mtd_device, link);
1103 len = strlen(dev->id->mtd_id) + 1;
1106 memcpy(p, dev->id->mtd_id, len - 1);
1111 /* format partitions */
1114 list_for_each(pentry, &dev->parts) {
1115 part = list_entry(pentry, struct part_info, link);
1117 offset = part->offset;
1120 /* partition size */
1121 memsize_format(tmpbuf, size);
1122 len = strlen(tmpbuf);
1125 memcpy(p, tmpbuf, len);
1129 /* add offset only when there is a gap between
1131 if ((!prev_part && (offset != 0)) ||
1132 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1134 memsize_format(tmpbuf, offset);
1135 len = strlen(tmpbuf) + 1;
1139 memcpy(p, tmpbuf, len - 1);
1144 /* copy name only if user supplied */
1145 if(!part->auto_name) {
1146 len = strlen(part->name) + 2;
1151 memcpy(p, part->name, len - 2);
1158 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1167 /* print ',' separator if there are other partitions
1169 if (dev->num_parts > part_cnt) {
1177 /* print ';' separator if there are other devices following */
1178 if (dentry->next != &devices) {
1186 /* we still have at least one char left, as we decremented maxlen at
1193 last_parts[0] = '\0';
1198 * Call generate_mtdparts to process all devices and generate corresponding
1199 * mtdparts string, save it in mtdparts environment variable.
1201 * @param buf output buffer holding generated mtdparts string (output)
1202 * @param buflen buffer size
1203 * Return: 0 on success, 1 otherwise
1205 static int generate_mtdparts_save(char *buf, u32 buflen)
1209 ret = generate_mtdparts(buf, buflen);
1211 if ((buf[0] != '\0') && (ret == 0))
1212 env_set("mtdparts", buf);
1214 env_set("mtdparts", NULL);
1219 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1221 * Get the net size (w/o bad blocks) of the given partition.
1223 * @param mtd the mtd info
1224 * @param part the partition
1225 * Return: the calculated net size of this partition
1227 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1229 uint64_t i, net_size = 0;
1231 if (!mtd->_block_isbad)
1234 for (i = 0; i < part->size; i += mtd->erasesize) {
1235 if (!mtd->_block_isbad(mtd, part->offset + i))
1236 net_size += mtd->erasesize;
1243 static void print_partition_table(void)
1245 struct list_head *dentry, *pentry;
1246 struct part_info *part;
1247 struct mtd_device *dev;
1250 list_for_each(dentry, &devices) {
1251 dev = list_entry(dentry, struct mtd_device, link);
1252 /* list partitions for given device */
1254 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1255 struct mtd_info *mtd;
1257 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1260 printf("\ndevice %s%d <%s>, # parts = %d\n",
1261 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1262 dev->id->mtd_id, dev->num_parts);
1263 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1265 list_for_each(pentry, &dev->parts) {
1269 part = list_entry(pentry, struct part_info, link);
1270 net_size = net_part_size(mtd, part);
1271 size_note = part->size == net_size ? " " : " (!)";
1272 printf("%2d: %-20s0x%08llx\t0x%08x%s\t0x%08llx\t%d\n",
1273 part_num, part->name, part->size,
1274 net_size, size_note, part->offset,
1276 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1277 printf("\ndevice %s%d <%s>, # parts = %d\n",
1278 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1279 dev->id->mtd_id, dev->num_parts);
1280 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1282 list_for_each(pentry, &dev->parts) {
1283 part = list_entry(pentry, struct part_info, link);
1284 printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1285 part_num, part->name, part->size,
1286 part->offset, part->mask_flags);
1287 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1292 if (list_empty(&devices))
1293 printf("no partitions defined\n");
1297 * Format and print out a partition list for each device from global device
1300 static void list_partitions(void)
1302 struct part_info *part;
1304 debug("\n---list_partitions---\n");
1305 print_partition_table();
1307 /* current_mtd_dev is not NULL only when we have non empty device list */
1308 if (current_mtd_dev) {
1309 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1311 printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1312 MTD_DEV_TYPE(current_mtd_dev->id->type),
1313 current_mtd_dev->id->num, current_mtd_partnum,
1314 part->name, part->size, part->offset);
1316 printf("could not get current partition info\n\n");
1320 printf("\ndefaults:\n");
1321 printf("mtdids : %s\n",
1322 mtdids_default ? mtdids_default : "none");
1324 * Using printf() here results in printbuffer overflow
1325 * if default mtdparts string is greater than console
1326 * printbuffer. Use puts() to prevent system crashes.
1329 puts(mtdparts_default ? mtdparts_default : "none");
1334 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1335 * corresponding device and verify partition number.
1337 * @param id string describing device and partition or partition name
1338 * @param dev pointer to the requested device (output)
1339 * @param part_num verified partition number (output)
1340 * @param part pointer to requested partition (output)
1341 * Return: 0 on success, 1 otherwise
1343 int find_dev_and_part(const char *id, struct mtd_device **dev,
1344 u8 *part_num, struct part_info **part)
1346 struct list_head *dentry, *pentry;
1347 u8 type, dnum, pnum;
1350 debug("--- find_dev_and_part ---\nid = %s\n", id);
1352 list_for_each(dentry, &devices) {
1354 *dev = list_entry(dentry, struct mtd_device, link);
1355 list_for_each(pentry, &(*dev)->parts) {
1356 *part = list_entry(pentry, struct part_info, link);
1357 if (strcmp((*part)->name, id) == 0)
1368 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1371 if ((*p++ != ',') || (*p == '\0')) {
1372 printf("no partition number specified\n");
1375 pnum = simple_strtoul(p, (char **)&p, 0);
1377 printf("unexpected trailing character '%c'\n", *p);
1381 if ((*dev = device_find(type, dnum)) == NULL) {
1382 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1386 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1387 printf("no such partition\n");
1398 * Find and delete partition. For partition id format see find_dev_and_part().
1400 * @param id string describing device and partition
1401 * Return: 0 on success, 1 otherwise
1403 static int delete_partition(const char *id)
1406 struct mtd_device *dev;
1407 struct part_info *part;
1409 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1411 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1412 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1413 part->name, part->size, part->offset);
1415 if (part_del(dev, part) != 0)
1418 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1419 printf("generated mtdparts too long, resetting to null\n");
1425 printf("partition %s not found\n", id);
1429 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1431 * Increase the size of the given partition so that it's net size is at least
1432 * as large as the size member and such that the next partition would start on a
1433 * good block if it were adjacent to this partition.
1435 * @param mtd the mtd device
1436 * @param part the partition
1437 * @param next_offset pointer to the offset of the next partition after this
1438 * partition's size has been modified (output)
1440 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1441 uint64_t *next_offset)
1443 uint64_t net_size, padding_size = 0;
1446 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1450 * Absorb bad blocks immediately following this
1451 * partition also into the partition, such that
1452 * the next partition starts with a good block.
1455 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1456 mtd->erasesize, &padding_size, &truncated);
1460 padding_size -= mtd->erasesize;
1464 printf("truncated partition %s to %lld bytes\n", part->name,
1465 (uint64_t) net_size + padding_size);
1468 part->size = net_size + padding_size;
1469 *next_offset = part->offset + part->size;
1473 * Adjust all of the partition sizes, such that all partitions are at least
1474 * as big as their mtdparts environment variable sizes and they each start
1477 * Return: 0 on success, 1 otherwise
1479 static int spread_partitions(void)
1481 struct list_head *dentry, *pentry;
1482 struct mtd_device *dev;
1483 struct part_info *part;
1484 struct mtd_info *mtd;
1488 list_for_each(dentry, &devices) {
1489 dev = list_entry(dentry, struct mtd_device, link);
1491 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1496 list_for_each(pentry, &dev->parts) {
1497 part = list_entry(pentry, struct part_info, link);
1499 debug("spread_partitions: device = %s%d, partition %d ="
1500 " (%s) 0x%08llx@0x%08llx\n",
1501 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1502 part_num, part->name, part->size,
1505 if (cur_offs > part->offset)
1506 part->offset = cur_offs;
1508 spread_partition(mtd, part, &cur_offs);
1516 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1517 printf("generated mtdparts too long, resetting to null\n");
1522 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1525 * The mtdparts variable tends to be long. If we need to access it
1526 * before the env is relocated, then we need to use our own stack
1527 * buffer. gd->env_buf will be too small.
1529 * @param buf temporary buffer pointer MTDPARTS_MAXLEN long
1530 * Return: mtdparts variable string, NULL if not found
1532 static const char *env_get_mtdparts(char *buf)
1534 if (gd->flags & GD_FLG_ENV_READY)
1535 return env_get("mtdparts");
1536 if (env_get_f("mtdparts", buf, MTDPARTS_MAXLEN) != -1)
1542 * Accept character string describing mtd partitions and call device_parse()
1543 * for each entry. Add created devices to the global devices list.
1545 * @param mtdparts string specifing mtd partitions
1546 * Return: 0 on success, 1 otherwise
1548 static int parse_mtdparts(const char *const mtdparts)
1551 struct mtd_device *dev;
1553 char tmp_parts[MTDPARTS_MAXLEN];
1555 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", mtdparts);
1557 /* delete all devices and partitions */
1558 if (mtd_devices_init() != 0) {
1559 printf("could not initialise device list\n");
1563 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1564 p = env_get_mtdparts(tmp_parts);
1568 /* Skip the useless prefix, if any */
1569 if (strncmp(p, "mtdparts=", 9) == 0)
1572 while (*p != '\0') {
1574 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1577 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1578 dev->id->num, dev->id->mtd_id);
1580 /* check if parsed device is already on the list */
1581 if (device_find(dev->id->type, dev->id->num) != NULL) {
1582 printf("device %s%d redefined, please correct mtdparts variable\n",
1583 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1587 list_add_tail(&dev->link, &devices);
1592 device_delall(&devices);
1599 * Parse provided string describing mtdids mapping (see file header for mtdids
1600 * variable format). Allocate memory for each entry and add all found entries
1601 * to the global mtdids list.
1603 * @param ids mapping string
1604 * Return: 0 on success, 1 otherwise
1606 static int parse_mtdids(const char *const ids)
1608 const char *p = ids;
1612 struct list_head *entry, *n;
1613 struct mtdids *id_tmp;
1618 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1620 /* clean global mtdids list */
1621 list_for_each_safe(entry, n, &mtdids) {
1622 id_tmp = list_entry(entry, struct mtdids, link);
1623 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1628 INIT_LIST_HEAD(&mtdids);
1630 while(p && (*p != '\0')) {
1633 /* parse 'nor'|'nand'|'onenand'|'spi-nand'<dev-num> */
1634 if (mtd_id_parse(p, &p, &type, &num) != 0)
1638 printf("mtdids: incorrect <dev-num>\n");
1643 /* check if requested device exists */
1644 if (mtd_device_validate(type, num, &size) != 0)
1647 /* locate <mtd-id> */
1649 if ((p = strchr(mtd_id, ',')) != NULL) {
1650 mtd_id_len = p - mtd_id + 1;
1653 mtd_id_len = strlen(mtd_id) + 1;
1655 if (mtd_id_len == 0) {
1656 printf("mtdids: no <mtd-id> identifier\n");
1660 /* check if this id is already on the list */
1661 int double_entry = 0;
1662 list_for_each(entry, &mtdids) {
1663 id_tmp = list_entry(entry, struct mtdids, link);
1664 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1670 printf("device id %s%d redefined, please correct mtdids variable\n",
1671 MTD_DEV_TYPE(type), num);
1675 /* allocate mtdids structure */
1676 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1677 printf("out of memory\n");
1680 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1684 id->mtd_id = (char *)(id + 1);
1685 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1686 id->mtd_id[mtd_id_len - 1] = '\0';
1687 INIT_LIST_HEAD(&id->link);
1689 debug("+ id %s%d\t%16lld bytes\t%s\n",
1690 MTD_DEV_TYPE(id->type), id->num,
1691 id->size, id->mtd_id);
1693 list_add_tail(&id->link, &mtdids);
1697 /* clean mtdids list and free allocated memory */
1698 list_for_each_safe(entry, n, &mtdids) {
1699 id_tmp = list_entry(entry, struct mtdids, link);
1710 * Parse and initialize global mtdids mapping and create global
1711 * device/partition list.
1713 * Return: 0 on success, 1 otherwise
1715 int mtdparts_init(void)
1717 static int initialized = 0;
1718 const char *ids, *parts;
1719 const char *current_partition;
1721 char tmp_ep[PARTITION_MAXLEN + 1];
1722 char tmp_parts[MTDPARTS_MAXLEN];
1724 debug("\n---mtdparts_init---\n");
1726 INIT_LIST_HEAD(&mtdids);
1727 INIT_LIST_HEAD(&devices);
1728 memset(last_ids, 0, sizeof(last_ids));
1729 memset(last_parts, 0, sizeof(last_parts));
1730 memset(last_partition, 0, sizeof(last_partition));
1731 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
1732 board_mtdparts_default(&mtdids_default, &mtdparts_default);
1739 ids = env_get("mtdids");
1740 parts = env_get_mtdparts(tmp_parts);
1741 current_partition = env_get("partition");
1743 /* save it for later parsing, cannot rely on current partition pointer
1744 * as 'partition' variable may be updated during init */
1745 memset(tmp_parts, 0, sizeof(tmp_parts));
1746 memset(tmp_ep, 0, sizeof(tmp_ep));
1747 if (current_partition)
1748 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1750 debug("last_ids : %s\n", last_ids);
1751 debug("env_ids : %s\n", ids);
1752 debug("last_parts: %s\n", last_parts);
1753 debug("env_parts : %s\n\n", parts);
1755 debug("last_partition : %s\n", last_partition);
1756 debug("env_partition : %s\n", current_partition);
1758 /* if mtdids variable is empty try to use defaults */
1760 if (mtdids_default) {
1761 debug("mtdids variable not defined, using default\n");
1762 ids = mtdids_default;
1763 env_set("mtdids", (char *)ids);
1765 printf("mtdids not defined, no default present\n");
1769 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1770 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1774 /* use defaults when mtdparts variable is not defined
1775 * once mtdparts is saved environment, drop use_defaults flag */
1777 if (mtdparts_default && use_defaults) {
1778 parts = mtdparts_default;
1779 if (env_set("mtdparts", (char *)parts) == 0)
1782 printf("mtdparts variable not set, see 'help mtdparts'\n");
1785 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1786 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1790 /* check if we have already parsed those mtdids */
1791 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1796 if (parse_mtdids(ids) != 0) {
1801 /* ok it's good, save new ids */
1802 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1805 /* parse partitions if either mtdparts or mtdids were updated */
1806 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1807 if (parse_mtdparts(parts) != 0)
1810 if (list_empty(&devices)) {
1811 printf("mtdparts_init: no valid partitions\n");
1815 /* ok it's good, save new parts */
1816 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1818 /* reset first partition from first dev from the list as current */
1819 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1820 current_mtd_partnum = 0;
1823 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1824 MTD_DEV_TYPE(current_mtd_dev->id->type),
1825 current_mtd_dev->id->num, current_mtd_partnum);
1828 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1829 if (!parts && (last_parts[0] != '\0'))
1830 return mtd_devices_init();
1832 /* do not process current partition if mtdparts variable is null */
1836 /* is current partition set in environment? if so, use it */
1837 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1838 struct part_info *p;
1839 struct mtd_device *cdev;
1842 debug("--- getting current partition: %s\n", tmp_ep);
1844 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1845 current_mtd_dev = cdev;
1846 current_mtd_partnum = pnum;
1849 } else if (env_get("partition") == NULL) {
1850 debug("no partition variable set, setting...\n");
1858 * Return pointer to the partition of a requested number from a requested
1861 * @param dev device that is to be searched for a partition
1862 * @param part_num requested partition number
1863 * Return: pointer to the part_info, NULL otherwise
1865 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1867 struct list_head *entry;
1868 struct part_info *part;
1874 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1875 part_num, MTD_DEV_TYPE(dev->id->type),
1876 dev->id->num, dev->id->mtd_id);
1878 if (part_num >= dev->num_parts) {
1879 printf("invalid partition number %d for device %s%d (%s)\n",
1880 part_num, MTD_DEV_TYPE(dev->id->type),
1881 dev->id->num, dev->id->mtd_id);
1885 /* locate partition number, return it */
1887 list_for_each(entry, &dev->parts) {
1888 part = list_entry(entry, struct part_info, link);
1890 if (part_num == num++) {
1898 /***************************************************/
1899 /* U-Boot commands */
1900 /***************************************************/
1901 /* command line only */
1903 * Routine implementing u-boot chpart command. Sets new current partition based
1904 * on the user supplied partition id. For partition id format see find_dev_and_part().
1906 * @param cmdtp command internal data
1907 * @param flag command flag
1908 * @param argc number of arguments supplied to the command
1909 * @param argv arguments list
1910 * Return: 0 on success, 1 otherwise
1912 static int do_chpart(struct cmd_tbl *cmdtp, int flag, int argc,
1915 /* command line only */
1916 struct mtd_device *dev;
1917 struct part_info *part;
1920 if (mtdparts_init() !=0)
1924 printf("no partition id specified\n");
1928 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1931 current_mtd_dev = dev;
1932 current_mtd_partnum = pnum;
1935 printf("partition changed to %s%d,%d\n",
1936 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1942 * Routine implementing u-boot mtdparts command. Initialize/update default global
1943 * partition list and process user partition request (list, add, del).
1945 * @param cmdtp command internal data
1946 * @param flag command flag
1947 * @param argc number of arguments supplied to the command
1948 * @param argv arguments list
1949 * Return: 0 on success, 1 otherwise
1951 static int do_mtdparts(struct cmd_tbl *cmdtp, int flag, int argc,
1955 if (strcmp(argv[1], "default") == 0) {
1956 env_set("mtdids", NULL);
1957 env_set("mtdparts", NULL);
1958 env_set("partition", NULL);
1963 } else if (strcmp(argv[1], "delall") == 0) {
1964 /* this may be the first run, initialize lists if needed */
1967 env_set("mtdparts", NULL);
1969 /* mtd_devices_init() calls current_save() */
1970 return mtd_devices_init();
1974 /* make sure we are in sync with env variables */
1975 if (mtdparts_init() != 0)
1983 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1984 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1985 #define PART_ADD_DESC_MAXLEN 64
1986 char tmpbuf[PART_ADD_DESC_MAXLEN];
1987 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1988 struct mtd_info *mtd;
1989 uint64_t next_offset;
1992 struct mtd_device *dev;
1993 struct mtd_device *dev_tmp;
1995 struct part_info *p;
1997 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
2000 if ((id = id_find(type, num)) == NULL) {
2001 printf("no such device %s defined in mtdids variable\n", argv[2]);
2005 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
2006 len += strlen(argv[3]); /* size@offset */
2007 len += strlen(argv[4]) + 2; /* '(' name ')' */
2008 if (argv[5] && (strlen(argv[5]) == 2))
2009 len += 2; /* 'ro' */
2011 if (len >= PART_ADD_DESC_MAXLEN) {
2012 printf("too long partition description\n");
2015 sprintf(tmpbuf, "%s:%s(%s)%s",
2016 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
2017 debug("add tmpbuf: %s\n", tmpbuf);
2019 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
2022 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2023 dev->id->num, dev->id->mtd_id);
2025 p = list_entry(dev->parts.next, struct part_info, link);
2027 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2028 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2031 if (!strcmp(&argv[1][3], ".spread")) {
2032 spread_partition(mtd, p, &next_offset);
2033 debug("increased %s to %llu bytes\n", p->name, p->size);
2037 dev_tmp = device_find(dev->id->type, dev->id->num);
2038 if (dev_tmp == NULL) {
2040 } else if (part_add(dev_tmp, p) != 0) {
2041 /* merge new partition with existing ones*/
2046 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2047 printf("generated mtdparts too long, resetting to null\n");
2054 /* mtdparts del part-id */
2055 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2056 debug("del: part-id = %s\n", argv[2]);
2058 return delete_partition(argv[2]);
2061 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2062 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2063 return spread_partitions();
2064 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2066 return CMD_RET_USAGE;
2069 /***************************************************/
2071 chpart, 2, 0, do_chpart,
2072 "change active partition of a MTD device",
2074 " - change active partition (e.g. part-id = nand0,1) of a MTD device"
2077 U_BOOT_LONGHELP(mtdparts,
2079 " - list partition table\n"
2081 " - delete all partitions\n"
2082 "mtdparts del part-id\n"
2083 " - delete partition (e.g. part-id = nand0,1)\n"
2084 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2085 " - add partition\n"
2086 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2087 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2088 " - add partition, padding size by skipping bad blocks\n"
2090 "mtdparts default\n"
2091 " - reset partition table to defaults\n"
2092 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2094 " - adjust the sizes of the partitions so they are\n"
2095 " at least as big as the mtdparts variable specifies\n"
2096 " and they each start on a good block\n\n"
2099 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2101 "this command uses three environment variables:\n\n"
2102 "'partition' - keeps current partition identifier\n\n"
2103 "partition := <part-id>\n"
2104 "<part-id> := <dev-id>,part_num\n\n"
2105 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2106 "mtdids=<idmap>[,<idmap>,...]\n\n"
2107 "<idmap> := <dev-id>=<mtd-id>\n"
2108 "<dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>\n"
2109 "<dev-num> := mtd device number, 0...\n"
2110 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2111 "'mtdparts' - partition list\n\n"
2112 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2113 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2114 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2115 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2116 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2117 "<offset> := partition start offset within the device\n"
2118 "<name> := '(' NAME ')'\n"
2119 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)");
2122 mtdparts, 6, 0, do_mtdparts,
2123 "define flash/nand partitions", mtdparts_help_text
2125 /***************************************************/