1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2002
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * (C) Copyright 2002
7 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
8 *
9 * (C) Copyright 2003
10 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
11 *
12 * (C) Copyright 2005
13 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
14 *
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
17 * kernel tree.
18 *
19 * (C) Copyright 2008
20 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
21 *
22 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
23 * Copyright 2002 SYSGO Real-Time Solutions GmbH
24 */
25
26 /*
27 * Three environment variables are used by the parsing routines:
28 *
29 * 'partition' - keeps current partition identifier
30 *
31 * partition := <part-id>
32 * <part-id> := <dev-id>,part_num
33 *
34 *
35 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
36 *
37 * mtdids=<idmap>[,<idmap>,...]
38 *
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)
43 *
44 *
45 * 'mtdparts' - partition list
46 *
47 * mtdparts=[mtdparts=]<mtd-def>[;<mtd-def>...]
48 *
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)
56 *
57 * Notes:
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
60 *
61 * Examples:
62 *
63 * 1 NOR Flash, with 1 single writable partition:
64 * mtdids=nor0=edb7312-nor
65 * mtdparts=[mtdparts=]edb7312-nor:-
66 *
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)
70 *
71 */
72
73 #include <common.h>
74 #include <command.h>
75 #include <env.h>
76 #include <malloc.h>
77 #include <jffs2/load_kernel.h>
78 #include <linux/list.h>
79 #include <linux/ctype.h>
80 #include <linux/err.h>
81 #include <linux/mtd/mtd.h>
82
83 #if defined(CONFIG_CMD_NAND)
84 #include <linux/mtd/rawnand.h>
85 #include <nand.h>
86 #endif
87
88 #if defined(CONFIG_CMD_ONENAND)
89 #include <linux/mtd/onenand.h>
90 #include <onenand_uboot.h>
91 #endif
92
93 DECLARE_GLOBAL_DATA_PTR;
94
95 /* special size referring to all the remaining space in a partition */
96 #define SIZE_REMAINING (~0llu)
97
98 /* special offset value, it is used when not provided by user
99 *
100 * this value is used temporarily during parsing, later such offests
101 * are recalculated */
102 #define OFFSET_NOT_SPECIFIED (~0llu)
103
104 /* minimum partition size */
105 #define MIN_PART_SIZE 4096
106
107 /* this flag needs to be set in part_info struct mask_flags
108 * field for read-only partitions */
109 #define MTD_WRITEABLE_CMD 1
110
111 /* default values for mtdids and mtdparts variables */
112 #if !defined(MTDIDS_DEFAULT)
113 #ifdef CONFIG_MTDIDS_DEFAULT
114 #define MTDIDS_DEFAULT CONFIG_MTDIDS_DEFAULT
115 #else
116 #define MTDIDS_DEFAULT NULL
117 #endif
118 #endif
119 #if !defined(MTDPARTS_DEFAULT)
120 #ifdef CONFIG_MTDPARTS_DEFAULT
121 #define MTDPARTS_DEFAULT CONFIG_MTDPARTS_DEFAULT
122 #else
123 #define MTDPARTS_DEFAULT NULL
124 #endif
125 #endif
126 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
127 extern void board_mtdparts_default(const char **mtdids, const char **mtdparts);
128 #endif
129 static const char *mtdids_default = MTDIDS_DEFAULT;
130 static const char *mtdparts_default = MTDPARTS_DEFAULT;
131
132 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
133 #define MTDIDS_MAXLEN 128
134 #define MTDPARTS_MAXLEN 512
135 #define PARTITION_MAXLEN 16
136 static char last_ids[MTDIDS_MAXLEN + 1];
137 static char last_parts[MTDPARTS_MAXLEN + 1];
138 static char last_partition[PARTITION_MAXLEN + 1];
139
140 /* low level jffs2 cache cleaning routine */
141 extern void jffs2_free_cache(struct part_info *part);
142
143 /* mtdids mapping list, filled by parse_ids() */
144 static struct list_head mtdids;
145
146 /* device/partition list, parse_cmdline() parses into here */
147 static struct list_head devices;
148
149 /* current active device and partition number */
150 struct mtd_device *current_mtd_dev = NULL;
151 u8 current_mtd_partnum = 0;
152
153 u8 use_defaults;
154
155 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
156
157 /* command line only routines */
158 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len);
159 static int device_del(struct mtd_device *dev);
160
161 /**
162 * Parses a string into a number. The number stored at ptr is
163 * potentially suffixed with K (for kilobytes, or 1024 bytes),
164 * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
165 * 1073741824). If the number is suffixed with K, M, or G, then
166 * the return value is the number multiplied by one kilobyte, one
167 * megabyte, or one gigabyte, respectively.
168 *
169 * @param ptr where parse begins
170 * @param retptr output pointer to next char after parse completes (output)
171 * @return resulting unsigned int
172 */
memsize_parse(const char * const ptr,const char ** retptr)173 static u64 memsize_parse (const char *const ptr, const char **retptr)
174 {
175 u64 ret = simple_strtoull(ptr, (char **)retptr, 0);
176
177 switch (**retptr) {
178 case 'G':
179 case 'g':
180 ret <<= 10;
181 /* Fallthrough */
182 case 'M':
183 case 'm':
184 ret <<= 10;
185 /* Fallthrough */
186 case 'K':
187 case 'k':
188 ret <<= 10;
189 (*retptr)++;
190 /* Fallthrough */
191 default:
192 break;
193 }
194
195 return ret;
196 }
197
198 /**
199 * Format string describing supplied size. This routine does the opposite job
200 * to memsize_parse(). Size in bytes is converted to string and if possible
201 * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
202 *
203 * Note, that this routine does not check for buffer overflow, it's the caller
204 * who must assure enough space.
205 *
206 * @param buf output buffer
207 * @param size size to be converted to string
208 */
memsize_format(char * buf,u64 size)209 static void memsize_format(char *buf, u64 size)
210 {
211 #define SIZE_GB ((u32)1024*1024*1024)
212 #define SIZE_MB ((u32)1024*1024)
213 #define SIZE_KB ((u32)1024)
214
215 if ((size % SIZE_GB) == 0)
216 sprintf(buf, "%llug", size/SIZE_GB);
217 else if ((size % SIZE_MB) == 0)
218 sprintf(buf, "%llum", size/SIZE_MB);
219 else if (size % SIZE_KB == 0)
220 sprintf(buf, "%lluk", size/SIZE_KB);
221 else
222 sprintf(buf, "%llu", size);
223 }
224
225 /**
226 * This routine does global indexing of all partitions. Resulting index for
227 * current partition is saved in 'mtddevnum'. Current partition name in
228 * 'mtddevname'.
229 */
index_partitions(void)230 static void index_partitions(void)
231 {
232 u16 mtddevnum;
233 struct part_info *part;
234 struct list_head *dentry;
235 struct mtd_device *dev;
236
237 debug("--- index partitions ---\n");
238
239 if (current_mtd_dev) {
240 mtddevnum = 0;
241 list_for_each(dentry, &devices) {
242 dev = list_entry(dentry, struct mtd_device, link);
243 if (dev == current_mtd_dev) {
244 mtddevnum += current_mtd_partnum;
245 env_set_ulong("mtddevnum", mtddevnum);
246 debug("=> mtddevnum %d,\n", mtddevnum);
247 break;
248 }
249 mtddevnum += dev->num_parts;
250 }
251
252 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
253 if (part) {
254 env_set("mtddevname", part->name);
255
256 debug("=> mtddevname %s\n", part->name);
257 } else {
258 env_set("mtddevname", NULL);
259
260 debug("=> mtddevname NULL\n");
261 }
262 } else {
263 env_set("mtddevnum", NULL);
264 env_set("mtddevname", NULL);
265
266 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
267 }
268 }
269
270 /**
271 * Save current device and partition in environment variable 'partition'.
272 */
current_save(void)273 static void current_save(void)
274 {
275 char buf[16];
276
277 debug("--- current_save ---\n");
278
279 if (current_mtd_dev) {
280 sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type),
281 current_mtd_dev->id->num, current_mtd_partnum);
282
283 env_set("partition", buf);
284 strncpy(last_partition, buf, 16);
285
286 debug("=> partition %s\n", buf);
287 } else {
288 env_set("partition", NULL);
289 last_partition[0] = '\0';
290
291 debug("=> partition NULL\n");
292 }
293 index_partitions();
294 }
295
296
297 /**
298 * Produce a mtd_info given a type and num.
299 *
300 * @param type mtd type
301 * @param num mtd number
302 * @param mtd a pointer to an mtd_info instance (output)
303 * @return 0 if device is valid, 1 otherwise
304 */
get_mtd_info(u8 type,u8 num,struct mtd_info ** mtd)305 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
306 {
307 char mtd_dev[16];
308
309 sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
310 *mtd = get_mtd_device_nm(mtd_dev);
311 if (IS_ERR(*mtd)) {
312 printf("Device %s not found!\n", mtd_dev);
313 return 1;
314 }
315 put_mtd_device(*mtd);
316
317 return 0;
318 }
319
320 /**
321 * Performs sanity check for supplied flash partition.
322 * Table of existing MTD flash devices is searched and partition device
323 * is located. Alignment with the granularity of nand erasesize is verified.
324 *
325 * @param id of the parent device
326 * @param part partition to validate
327 * @return 0 if partition is valid, 1 otherwise
328 */
part_validate_eraseblock(struct mtdids * id,struct part_info * part)329 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
330 {
331 struct mtd_info *mtd = NULL;
332 int i, j;
333 ulong start;
334 u64 offset, size;
335
336 if (get_mtd_info(id->type, id->num, &mtd))
337 return 1;
338
339 part->sector_size = mtd->erasesize;
340
341 if (!mtd->numeraseregions) {
342 /*
343 * Only one eraseregion (NAND, SPI-NAND, OneNAND or uniform NOR),
344 * checking for alignment is easy here
345 */
346 offset = part->offset;
347 if (do_div(offset, mtd->erasesize)) {
348 printf("%s%d: partition (%s) start offset"
349 "alignment incorrect\n",
350 MTD_DEV_TYPE(id->type), id->num, part->name);
351 return 1;
352 }
353
354 size = part->size;
355 if (do_div(size, mtd->erasesize)) {
356 printf("%s%d: partition (%s) size alignment incorrect\n",
357 MTD_DEV_TYPE(id->type), id->num, part->name);
358 return 1;
359 }
360 } else {
361 /*
362 * Multiple eraseregions (non-uniform NOR),
363 * checking for alignment is more complex here
364 */
365
366 /* Check start alignment */
367 for (i = 0; i < mtd->numeraseregions; i++) {
368 start = mtd->eraseregions[i].offset;
369 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
370 if (part->offset == start)
371 goto start_ok;
372 start += mtd->eraseregions[i].erasesize;
373 }
374 }
375
376 printf("%s%d: partition (%s) start offset alignment incorrect\n",
377 MTD_DEV_TYPE(id->type), id->num, part->name);
378 return 1;
379
380 start_ok:
381
382 /* Check end/size alignment */
383 for (i = 0; i < mtd->numeraseregions; i++) {
384 start = mtd->eraseregions[i].offset;
385 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
386 if ((part->offset + part->size) == start)
387 goto end_ok;
388 start += mtd->eraseregions[i].erasesize;
389 }
390 }
391 /* Check last sector alignment */
392 if ((part->offset + part->size) == start)
393 goto end_ok;
394
395 printf("%s%d: partition (%s) size alignment incorrect\n",
396 MTD_DEV_TYPE(id->type), id->num, part->name);
397 return 1;
398
399 end_ok:
400 return 0;
401 }
402
403 return 0;
404 }
405
406
407 /**
408 * Performs sanity check for supplied partition. Offset and size are
409 * verified to be within valid range. Partition type is checked and
410 * part_validate_eraseblock() is called with the argument of part.
411 *
412 * @param id of the parent device
413 * @param part partition to validate
414 * @return 0 if partition is valid, 1 otherwise
415 */
part_validate(struct mtdids * id,struct part_info * part)416 static int part_validate(struct mtdids *id, struct part_info *part)
417 {
418 if (part->size == SIZE_REMAINING)
419 part->size = id->size - part->offset;
420
421 if (part->offset > id->size) {
422 printf("%s: offset %08llx beyond flash size %08llx\n",
423 id->mtd_id, part->offset, id->size);
424 return 1;
425 }
426
427 if ((part->offset + part->size) <= part->offset) {
428 printf("%s%d: partition (%s) size too big\n",
429 MTD_DEV_TYPE(id->type), id->num, part->name);
430 return 1;
431 }
432
433 if (part->offset + part->size > id->size) {
434 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
435 return 1;
436 }
437
438 /*
439 * Now we need to check if the partition starts and ends on
440 * sector (eraseblock) regions
441 */
442 return part_validate_eraseblock(id, part);
443 }
444
445 /**
446 * Delete selected partition from the partition list of the specified device.
447 *
448 * @param dev device to delete partition from
449 * @param part partition to delete
450 * @return 0 on success, 1 otherwise
451 */
part_del(struct mtd_device * dev,struct part_info * part)452 static int part_del(struct mtd_device *dev, struct part_info *part)
453 {
454 u8 current_save_needed = 0;
455
456 /* if there is only one partition, remove whole device */
457 if (dev->num_parts == 1)
458 return device_del(dev);
459
460 /* otherwise just delete this partition */
461
462 if (dev == current_mtd_dev) {
463 /* we are modyfing partitions for the current device,
464 * update current */
465 struct part_info *curr_pi;
466 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
467
468 if (curr_pi) {
469 if (curr_pi == part) {
470 printf("current partition deleted, resetting current to 0\n");
471 current_mtd_partnum = 0;
472 } else if (part->offset <= curr_pi->offset) {
473 current_mtd_partnum--;
474 }
475 current_save_needed = 1;
476 }
477 }
478
479 list_del(&part->link);
480 free(part);
481 dev->num_parts--;
482
483 if (current_save_needed > 0)
484 current_save();
485 else
486 index_partitions();
487
488 return 0;
489 }
490
491 /**
492 * Delete all partitions from parts head list, free memory.
493 *
494 * @param head list of partitions to delete
495 */
part_delall(struct list_head * head)496 static void part_delall(struct list_head *head)
497 {
498 struct list_head *entry, *n;
499 struct part_info *part_tmp;
500
501 /* clean tmp_list and free allocated memory */
502 list_for_each_safe(entry, n, head) {
503 part_tmp = list_entry(entry, struct part_info, link);
504
505 list_del(entry);
506 free(part_tmp);
507 }
508 }
509
510 /**
511 * Add new partition to the supplied partition list. Make sure partitions are
512 * sorted by offset in ascending order.
513 *
514 * @param head list this partition is to be added to
515 * @param new partition to be added
516 */
part_sort_add(struct mtd_device * dev,struct part_info * part)517 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
518 {
519 struct list_head *entry;
520 struct part_info *new_pi, *curr_pi;
521
522 /* link partition to parrent dev */
523 part->dev = dev;
524
525 if (list_empty(&dev->parts)) {
526 debug("part_sort_add: list empty\n");
527 list_add(&part->link, &dev->parts);
528 dev->num_parts++;
529 index_partitions();
530 return 0;
531 }
532
533 new_pi = list_entry(&part->link, struct part_info, link);
534
535 /* get current partition info if we are updating current device */
536 curr_pi = NULL;
537 if (dev == current_mtd_dev)
538 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
539
540 list_for_each(entry, &dev->parts) {
541 struct part_info *pi;
542
543 pi = list_entry(entry, struct part_info, link);
544
545 /* be compliant with kernel cmdline, allow only one partition at offset zero */
546 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
547 printf("cannot add second partition at offset 0\n");
548 return 1;
549 }
550
551 if (new_pi->offset <= pi->offset) {
552 list_add_tail(&part->link, entry);
553 dev->num_parts++;
554
555 if (curr_pi && (pi->offset <= curr_pi->offset)) {
556 /* we are modyfing partitions for the current
557 * device, update current */
558 current_mtd_partnum++;
559 current_save();
560 } else {
561 index_partitions();
562 }
563 return 0;
564 }
565 }
566
567 list_add_tail(&part->link, &dev->parts);
568 dev->num_parts++;
569 index_partitions();
570 return 0;
571 }
572
573 /**
574 * Add provided partition to the partition list of a given device.
575 *
576 * @param dev device to which partition is added
577 * @param part partition to be added
578 * @return 0 on success, 1 otherwise
579 */
part_add(struct mtd_device * dev,struct part_info * part)580 static int part_add(struct mtd_device *dev, struct part_info *part)
581 {
582 /* verify alignment and size */
583 if (part_validate(dev->id, part) != 0)
584 return 1;
585
586 /* partition is ok, add it to the list */
587 if (part_sort_add(dev, part) != 0)
588 return 1;
589
590 return 0;
591 }
592
593 /**
594 * Parse one partition definition, allocate memory and return pointer to this
595 * location in retpart.
596 *
597 * @param partdef pointer to the partition definition string i.e. <part-def>
598 * @param ret output pointer to next char after parse completes (output)
599 * @param retpart pointer to the allocated partition (output)
600 * @return 0 on success, 1 otherwise
601 */
part_parse(const char * const partdef,const char ** ret,struct part_info ** retpart)602 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
603 {
604 struct part_info *part;
605 u64 size;
606 u64 offset;
607 const char *name;
608 int name_len;
609 unsigned int mask_flags;
610 const char *p;
611
612 p = partdef;
613 *retpart = NULL;
614 *ret = NULL;
615
616 /* fetch the partition size */
617 if (*p == '-') {
618 /* assign all remaining space to this partition */
619 debug("'-': remaining size assigned\n");
620 size = SIZE_REMAINING;
621 p++;
622 } else {
623 size = memsize_parse(p, &p);
624 if (size < MIN_PART_SIZE) {
625 printf("partition size too small (%llx)\n", size);
626 return 1;
627 }
628 }
629
630 /* check for offset */
631 offset = OFFSET_NOT_SPECIFIED;
632 if (*p == '@') {
633 p++;
634 offset = memsize_parse(p, &p);
635 }
636
637 /* now look for the name */
638 if (*p == '(') {
639 name = ++p;
640 if ((p = strchr(name, ')')) == NULL) {
641 printf("no closing ) found in partition name\n");
642 return 1;
643 }
644 name_len = p - name + 1;
645 if ((name_len - 1) == 0) {
646 printf("empty partition name\n");
647 return 1;
648 }
649 p++;
650 } else {
651 /* 0x00000000@0x00000000 */
652 name_len = 22;
653 name = NULL;
654 }
655
656 /* test for options */
657 mask_flags = 0;
658 if (strncmp(p, "ro", 2) == 0) {
659 mask_flags |= MTD_WRITEABLE_CMD;
660 p += 2;
661 }
662
663 /* check for next partition definition */
664 if (*p == ',') {
665 if (size == SIZE_REMAINING) {
666 *ret = NULL;
667 printf("no partitions allowed after a fill-up partition\n");
668 return 1;
669 }
670 *ret = ++p;
671 } else if ((*p == ';') || (*p == '\0')) {
672 *ret = p;
673 } else {
674 printf("unexpected character '%c' at the end of partition\n", *p);
675 *ret = NULL;
676 return 1;
677 }
678
679 /* allocate memory */
680 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
681 if (!part) {
682 printf("out of memory\n");
683 return 1;
684 }
685 memset(part, 0, sizeof(struct part_info) + name_len);
686 part->size = size;
687 part->offset = offset;
688 part->mask_flags = mask_flags;
689 part->name = (char *)(part + 1);
690
691 if (name) {
692 /* copy user provided name */
693 strncpy(part->name, name, name_len - 1);
694 part->auto_name = 0;
695 } else {
696 /* auto generated name in form of size@offset */
697 snprintf(part->name, name_len, "0x%08llx@0x%08llx", size, offset);
698 part->auto_name = 1;
699 }
700
701 part->name[name_len - 1] = '\0';
702 INIT_LIST_HEAD(&part->link);
703
704 debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx mask flags %d\n",
705 part->name, part->size,
706 part->offset, part->mask_flags);
707
708 *retpart = part;
709 return 0;
710 }
711
712 /**
713 * Check device number to be within valid range for given device type.
714 *
715 * @param type mtd type
716 * @param num mtd number
717 * @param size a pointer to the size of the mtd device (output)
718 * @return 0 if device is valid, 1 otherwise
719 */
mtd_device_validate(u8 type,u8 num,u64 * size)720 static int mtd_device_validate(u8 type, u8 num, u64 *size)
721 {
722 struct mtd_info *mtd = NULL;
723
724 if (get_mtd_info(type, num, &mtd))
725 return 1;
726
727 *size = mtd->size;
728
729 return 0;
730 }
731
732 /**
733 * Delete all mtd devices from a supplied devices list, free memory allocated for
734 * each device and delete all device partitions.
735 *
736 * @return 0 on success, 1 otherwise
737 */
device_delall(struct list_head * head)738 static int device_delall(struct list_head *head)
739 {
740 struct list_head *entry, *n;
741 struct mtd_device *dev_tmp;
742
743 /* clean devices list */
744 list_for_each_safe(entry, n, head) {
745 dev_tmp = list_entry(entry, struct mtd_device, link);
746 list_del(entry);
747 part_delall(&dev_tmp->parts);
748 free(dev_tmp);
749 }
750 INIT_LIST_HEAD(&devices);
751
752 return 0;
753 }
754
755 /**
756 * If provided device exists it's partitions are deleted, device is removed
757 * from device list and device memory is freed.
758 *
759 * @param dev device to be deleted
760 * @return 0 on success, 1 otherwise
761 */
device_del(struct mtd_device * dev)762 static int device_del(struct mtd_device *dev)
763 {
764 part_delall(&dev->parts);
765 list_del(&dev->link);
766 free(dev);
767
768 if (dev == current_mtd_dev) {
769 /* we just deleted current device */
770 if (list_empty(&devices)) {
771 current_mtd_dev = NULL;
772 } else {
773 /* reset first partition from first dev from the
774 * devices list as current */
775 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
776 current_mtd_partnum = 0;
777 }
778 current_save();
779 return 0;
780 }
781
782 index_partitions();
783 return 0;
784 }
785
786 /**
787 * Search global device list and return pointer to the device of type and num
788 * specified.
789 *
790 * @param type device type
791 * @param num device number
792 * @return NULL if requested device does not exist
793 */
device_find(u8 type,u8 num)794 struct mtd_device *device_find(u8 type, u8 num)
795 {
796 struct list_head *entry;
797 struct mtd_device *dev_tmp;
798
799 list_for_each(entry, &devices) {
800 dev_tmp = list_entry(entry, struct mtd_device, link);
801
802 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
803 return dev_tmp;
804 }
805
806 return NULL;
807 }
808
809 /**
810 * Add specified device to the global device list.
811 *
812 * @param dev device to be added
813 */
device_add(struct mtd_device * dev)814 static void device_add(struct mtd_device *dev)
815 {
816 u8 current_save_needed = 0;
817
818 if (list_empty(&devices)) {
819 current_mtd_dev = dev;
820 current_mtd_partnum = 0;
821 current_save_needed = 1;
822 }
823
824 list_add_tail(&dev->link, &devices);
825
826 if (current_save_needed > 0)
827 current_save();
828 else
829 index_partitions();
830 }
831
832 /**
833 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
834 * return pointer to the device structure.
835 *
836 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
837 * @param ret output pointer to next char after parse completes (output)
838 * @param retdev pointer to the allocated device (output)
839 * @return 0 on success, 1 otherwise
840 */
device_parse(const char * const mtd_dev,const char ** ret,struct mtd_device ** retdev)841 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
842 {
843 struct mtd_device *dev;
844 struct part_info *part;
845 struct mtdids *id;
846 const char *mtd_id;
847 unsigned int mtd_id_len;
848 const char *p;
849 const char *pend;
850 LIST_HEAD(tmp_list);
851 struct list_head *entry, *n;
852 u16 num_parts;
853 u64 offset;
854 int err = 1;
855
856 debug("===device_parse===\n");
857
858 assert(retdev);
859 *retdev = NULL;
860
861 if (ret)
862 *ret = NULL;
863
864 /* fetch <mtd-id> */
865 mtd_id = p = mtd_dev;
866 if (!(p = strchr(mtd_id, ':'))) {
867 printf("no <mtd-id> identifier\n");
868 return 1;
869 }
870 mtd_id_len = p - mtd_id + 1;
871 p++;
872
873 /* verify if we have a valid device specified */
874 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
875 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
876 return 1;
877 }
878
879 pend = strchr(p, ';');
880 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
881 id->type, MTD_DEV_TYPE(id->type),
882 id->num, id->mtd_id);
883 debug("parsing partitions %.*s\n", (int)(pend ? pend - p : strlen(p)), p);
884
885 /* parse partitions */
886 num_parts = 0;
887
888 offset = 0;
889 if ((dev = device_find(id->type, id->num)) != NULL) {
890 /* if device already exists start at the end of the last partition */
891 part = list_entry(dev->parts.prev, struct part_info, link);
892 offset = part->offset + part->size;
893 }
894
895 while (p && (*p != '\0') && (*p != ';')) {
896 err = 1;
897 if ((part_parse(p, &p, &part) != 0) || (!part))
898 break;
899
900 /* calculate offset when not specified */
901 if (part->offset == OFFSET_NOT_SPECIFIED)
902 part->offset = offset;
903 else
904 offset = part->offset;
905
906 /* verify alignment and size */
907 if (part_validate(id, part) != 0)
908 break;
909
910 offset += part->size;
911
912 /* partition is ok, add it to the list */
913 list_add_tail(&part->link, &tmp_list);
914 num_parts++;
915 err = 0;
916 }
917 if (err == 1) {
918 part_delall(&tmp_list);
919 return 1;
920 }
921
922 debug("\ntotal partitions: %d\n", num_parts);
923
924 /* check for next device presence */
925 if (p) {
926 if (*p == ';') {
927 if (ret)
928 *ret = ++p;
929 } else if (*p == '\0') {
930 if (ret)
931 *ret = p;
932 } else {
933 printf("unexpected character '%c' at the end of device\n", *p);
934 if (ret)
935 *ret = NULL;
936 return 1;
937 }
938 }
939
940 /* allocate memory for mtd_device structure */
941 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
942 printf("out of memory\n");
943 return 1;
944 }
945 memset(dev, 0, sizeof(struct mtd_device));
946 dev->id = id;
947 dev->num_parts = 0; /* part_sort_add increments num_parts */
948 INIT_LIST_HEAD(&dev->parts);
949 INIT_LIST_HEAD(&dev->link);
950
951 /* move partitions from tmp_list to dev->parts */
952 list_for_each_safe(entry, n, &tmp_list) {
953 part = list_entry(entry, struct part_info, link);
954 list_del(entry);
955 if (part_sort_add(dev, part) != 0) {
956 device_del(dev);
957 return 1;
958 }
959 }
960
961 *retdev = dev;
962
963 debug("===\n\n");
964 return 0;
965 }
966
967 /**
968 * Initialize global device list.
969 *
970 * @return 0 on success, 1 otherwise
971 */
mtd_devices_init(void)972 static int mtd_devices_init(void)
973 {
974 last_parts[0] = '\0';
975 current_mtd_dev = NULL;
976 current_save();
977
978 return device_delall(&devices);
979 }
980
981 /*
982 * Search global mtdids list and find id of requested type and number.
983 *
984 * @return pointer to the id if it exists, NULL otherwise
985 */
id_find(u8 type,u8 num)986 static struct mtdids* id_find(u8 type, u8 num)
987 {
988 struct list_head *entry;
989 struct mtdids *id;
990
991 list_for_each(entry, &mtdids) {
992 id = list_entry(entry, struct mtdids, link);
993
994 if ((id->type == type) && (id->num == num))
995 return id;
996 }
997
998 return NULL;
999 }
1000
1001 /**
1002 * Search global mtdids list and find id of a requested mtd_id.
1003 *
1004 * Note: first argument is not null terminated.
1005 *
1006 * @param mtd_id string containing requested mtd_id
1007 * @param mtd_id_len length of supplied mtd_id
1008 * @return pointer to the id if it exists, NULL otherwise
1009 */
id_find_by_mtd_id(const char * mtd_id,unsigned int mtd_id_len)1010 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
1011 {
1012 struct list_head *entry;
1013 struct mtdids *id;
1014
1015 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1016 mtd_id_len, mtd_id, mtd_id_len);
1017
1018 list_for_each(entry, &mtdids) {
1019 id = list_entry(entry, struct mtdids, link);
1020
1021 debug("entry: '%s' (len = %zu)\n",
1022 id->mtd_id, strlen(id->mtd_id));
1023
1024 if (mtd_id_len != strlen(id->mtd_id))
1025 continue;
1026 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1027 return id;
1028 }
1029
1030 return NULL;
1031 }
1032
1033 /**
1034 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>,
1035 * return device type and number.
1036 *
1037 * @param id string describing device id
1038 * @param ret_id output pointer to next char after parse completes (output)
1039 * @param dev_type parsed device type (output)
1040 * @param dev_num parsed device number (output)
1041 * @return 0 on success, 1 otherwise
1042 */
mtd_id_parse(const char * id,const char ** ret_id,u8 * dev_type,u8 * dev_num)1043 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1044 u8 *dev_num)
1045 {
1046 const char *p = id;
1047
1048 *dev_type = 0;
1049 if (strncmp(p, "nand", 4) == 0) {
1050 *dev_type = MTD_DEV_TYPE_NAND;
1051 p += 4;
1052 } else if (strncmp(p, "nor", 3) == 0) {
1053 *dev_type = MTD_DEV_TYPE_NOR;
1054 p += 3;
1055 } else if (strncmp(p, "onenand", 7) == 0) {
1056 *dev_type = MTD_DEV_TYPE_ONENAND;
1057 p += 7;
1058 } else if (strncmp(p, "spi-nand", 8) == 0) {
1059 *dev_type = MTD_DEV_TYPE_SPINAND;
1060 p += 8;
1061 } else {
1062 printf("incorrect device type in %s\n", id);
1063 return 1;
1064 }
1065
1066 if (!isdigit(*p)) {
1067 printf("incorrect device number in %s\n", id);
1068 return 1;
1069 }
1070
1071 *dev_num = simple_strtoul(p, (char **)&p, 0);
1072 if (ret_id)
1073 *ret_id = p;
1074 return 0;
1075 }
1076
1077 /**
1078 * Process all devices and generate corresponding mtdparts string describing
1079 * all partitions on all devices.
1080 *
1081 * @param buf output buffer holding generated mtdparts string (output)
1082 * @param buflen buffer size
1083 * @return 0 on success, 1 otherwise
1084 */
generate_mtdparts(char * buf,u32 buflen)1085 static int generate_mtdparts(char *buf, u32 buflen)
1086 {
1087 struct list_head *pentry, *dentry;
1088 struct mtd_device *dev;
1089 struct part_info *part, *prev_part;
1090 char *p = buf;
1091 char tmpbuf[32];
1092 u64 size, offset;
1093 u32 len, part_cnt;
1094 u32 maxlen = buflen - 1;
1095
1096 debug("--- generate_mtdparts ---\n");
1097
1098 if (list_empty(&devices)) {
1099 buf[0] = '\0';
1100 return 0;
1101 }
1102
1103 list_for_each(dentry, &devices) {
1104 dev = list_entry(dentry, struct mtd_device, link);
1105
1106 /* copy mtd_id */
1107 len = strlen(dev->id->mtd_id) + 1;
1108 if (len > maxlen)
1109 goto cleanup;
1110 memcpy(p, dev->id->mtd_id, len - 1);
1111 p += len - 1;
1112 *(p++) = ':';
1113 maxlen -= len;
1114
1115 /* format partitions */
1116 prev_part = NULL;
1117 part_cnt = 0;
1118 list_for_each(pentry, &dev->parts) {
1119 part = list_entry(pentry, struct part_info, link);
1120 size = part->size;
1121 offset = part->offset;
1122 part_cnt++;
1123
1124 /* partition size */
1125 memsize_format(tmpbuf, size);
1126 len = strlen(tmpbuf);
1127 if (len > maxlen)
1128 goto cleanup;
1129 memcpy(p, tmpbuf, len);
1130 p += len;
1131 maxlen -= len;
1132
1133
1134 /* add offset only when there is a gap between
1135 * partitions */
1136 if ((!prev_part && (offset != 0)) ||
1137 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1138
1139 memsize_format(tmpbuf, offset);
1140 len = strlen(tmpbuf) + 1;
1141 if (len > maxlen)
1142 goto cleanup;
1143 *(p++) = '@';
1144 memcpy(p, tmpbuf, len - 1);
1145 p += len - 1;
1146 maxlen -= len;
1147 }
1148
1149 /* copy name only if user supplied */
1150 if(!part->auto_name) {
1151 len = strlen(part->name) + 2;
1152 if (len > maxlen)
1153 goto cleanup;
1154
1155 *(p++) = '(';
1156 memcpy(p, part->name, len - 2);
1157 p += len - 2;
1158 *(p++) = ')';
1159 maxlen -= len;
1160 }
1161
1162 /* ro mask flag */
1163 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1164 len = 2;
1165 if (len > maxlen)
1166 goto cleanup;
1167 *(p++) = 'r';
1168 *(p++) = 'o';
1169 maxlen -= 2;
1170 }
1171
1172 /* print ',' separator if there are other partitions
1173 * following */
1174 if (dev->num_parts > part_cnt) {
1175 if (1 > maxlen)
1176 goto cleanup;
1177 *(p++) = ',';
1178 maxlen--;
1179 }
1180 prev_part = part;
1181 }
1182 /* print ';' separator if there are other devices following */
1183 if (dentry->next != &devices) {
1184 if (1 > maxlen)
1185 goto cleanup;
1186 *(p++) = ';';
1187 maxlen--;
1188 }
1189 }
1190
1191 /* we still have at least one char left, as we decremented maxlen at
1192 * the begining */
1193 *p = '\0';
1194
1195 return 0;
1196
1197 cleanup:
1198 last_parts[0] = '\0';
1199 return 1;
1200 }
1201
1202 /**
1203 * Call generate_mtdparts to process all devices and generate corresponding
1204 * mtdparts string, save it in mtdparts environment variable.
1205 *
1206 * @param buf output buffer holding generated mtdparts string (output)
1207 * @param buflen buffer size
1208 * @return 0 on success, 1 otherwise
1209 */
generate_mtdparts_save(char * buf,u32 buflen)1210 static int generate_mtdparts_save(char *buf, u32 buflen)
1211 {
1212 int ret;
1213
1214 ret = generate_mtdparts(buf, buflen);
1215
1216 if ((buf[0] != '\0') && (ret == 0))
1217 env_set("mtdparts", buf);
1218 else
1219 env_set("mtdparts", NULL);
1220
1221 return ret;
1222 }
1223
1224 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1225 /**
1226 * Get the net size (w/o bad blocks) of the given partition.
1227 *
1228 * @param mtd the mtd info
1229 * @param part the partition
1230 * @return the calculated net size of this partition
1231 */
net_part_size(struct mtd_info * mtd,struct part_info * part)1232 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1233 {
1234 uint64_t i, net_size = 0;
1235
1236 if (!mtd->_block_isbad)
1237 return part->size;
1238
1239 for (i = 0; i < part->size; i += mtd->erasesize) {
1240 if (!mtd->_block_isbad(mtd, part->offset + i))
1241 net_size += mtd->erasesize;
1242 }
1243
1244 return net_size;
1245 }
1246 #endif
1247
print_partition_table(void)1248 static void print_partition_table(void)
1249 {
1250 struct list_head *dentry, *pentry;
1251 struct part_info *part;
1252 struct mtd_device *dev;
1253 int part_num;
1254
1255 list_for_each(dentry, &devices) {
1256 dev = list_entry(dentry, struct mtd_device, link);
1257 /* list partitions for given device */
1258 part_num = 0;
1259 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1260 struct mtd_info *mtd;
1261
1262 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1263 return;
1264
1265 printf("\ndevice %s%d <%s>, # parts = %d\n",
1266 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1267 dev->id->mtd_id, dev->num_parts);
1268 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1269
1270 list_for_each(pentry, &dev->parts) {
1271 u32 net_size;
1272 char *size_note;
1273
1274 part = list_entry(pentry, struct part_info, link);
1275 net_size = net_part_size(mtd, part);
1276 size_note = part->size == net_size ? " " : " (!)";
1277 printf("%2d: %-20s0x%08llx\t0x%08x%s\t0x%08llx\t%d\n",
1278 part_num, part->name, part->size,
1279 net_size, size_note, part->offset,
1280 part->mask_flags);
1281 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1282 printf("\ndevice %s%d <%s>, # parts = %d\n",
1283 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1284 dev->id->mtd_id, dev->num_parts);
1285 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1286
1287 list_for_each(pentry, &dev->parts) {
1288 part = list_entry(pentry, struct part_info, link);
1289 printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1290 part_num, part->name, part->size,
1291 part->offset, part->mask_flags);
1292 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1293 part_num++;
1294 }
1295 }
1296
1297 if (list_empty(&devices))
1298 printf("no partitions defined\n");
1299 }
1300
1301 /**
1302 * Format and print out a partition list for each device from global device
1303 * list.
1304 */
1305 static void list_partitions(void)
1306 {
1307 struct part_info *part;
1308
1309 debug("\n---list_partitions---\n");
1310 print_partition_table();
1311
1312 /* current_mtd_dev is not NULL only when we have non empty device list */
1313 if (current_mtd_dev) {
1314 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1315 if (part) {
1316 printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1317 MTD_DEV_TYPE(current_mtd_dev->id->type),
1318 current_mtd_dev->id->num, current_mtd_partnum,
1319 part->name, part->size, part->offset);
1320 } else {
1321 printf("could not get current partition info\n\n");
1322 }
1323 }
1324
1325 printf("\ndefaults:\n");
1326 printf("mtdids : %s\n",
1327 mtdids_default ? mtdids_default : "none");
1328 /*
1329 * Using printf() here results in printbuffer overflow
1330 * if default mtdparts string is greater than console
1331 * printbuffer. Use puts() to prevent system crashes.
1332 */
1333 puts("mtdparts: ");
1334 puts(mtdparts_default ? mtdparts_default : "none");
1335 puts("\n");
1336 }
1337
1338 /**
1339 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1340 * corresponding device and verify partition number.
1341 *
1342 * @param id string describing device and partition or partition name
1343 * @param dev pointer to the requested device (output)
1344 * @param part_num verified partition number (output)
1345 * @param part pointer to requested partition (output)
1346 * @return 0 on success, 1 otherwise
1347 */
1348 int find_dev_and_part(const char *id, struct mtd_device **dev,
1349 u8 *part_num, struct part_info **part)
1350 {
1351 struct list_head *dentry, *pentry;
1352 u8 type, dnum, pnum;
1353 const char *p;
1354
1355 debug("--- find_dev_and_part ---\nid = %s\n", id);
1356
1357 list_for_each(dentry, &devices) {
1358 *part_num = 0;
1359 *dev = list_entry(dentry, struct mtd_device, link);
1360 list_for_each(pentry, &(*dev)->parts) {
1361 *part = list_entry(pentry, struct part_info, link);
1362 if (strcmp((*part)->name, id) == 0)
1363 return 0;
1364 (*part_num)++;
1365 }
1366 }
1367
1368 p = id;
1369 *dev = NULL;
1370 *part = NULL;
1371 *part_num = 0;
1372
1373 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1374 return 1;
1375
1376 if ((*p++ != ',') || (*p == '\0')) {
1377 printf("no partition number specified\n");
1378 return 1;
1379 }
1380 pnum = simple_strtoul(p, (char **)&p, 0);
1381 if (*p != '\0') {
1382 printf("unexpected trailing character '%c'\n", *p);
1383 return 1;
1384 }
1385
1386 if ((*dev = device_find(type, dnum)) == NULL) {
1387 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1388 return 1;
1389 }
1390
1391 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1392 printf("no such partition\n");
1393 *dev = NULL;
1394 return 1;
1395 }
1396
1397 *part_num = pnum;
1398
1399 return 0;
1400 }
1401
1402 /**
1403 * Find and delete partition. For partition id format see find_dev_and_part().
1404 *
1405 * @param id string describing device and partition
1406 * @return 0 on success, 1 otherwise
1407 */
1408 static int delete_partition(const char *id)
1409 {
1410 u8 pnum;
1411 struct mtd_device *dev;
1412 struct part_info *part;
1413
1414 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1415
1416 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1417 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1418 part->name, part->size, part->offset);
1419
1420 if (part_del(dev, part) != 0)
1421 return 1;
1422
1423 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1424 printf("generated mtdparts too long, resetting to null\n");
1425 return 1;
1426 }
1427 return 0;
1428 }
1429
1430 printf("partition %s not found\n", id);
1431 return 1;
1432 }
1433
1434 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1435 /**
1436 * Increase the size of the given partition so that it's net size is at least
1437 * as large as the size member and such that the next partition would start on a
1438 * good block if it were adjacent to this partition.
1439 *
1440 * @param mtd the mtd device
1441 * @param part the partition
1442 * @param next_offset pointer to the offset of the next partition after this
1443 * partition's size has been modified (output)
1444 */
1445 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1446 uint64_t *next_offset)
1447 {
1448 uint64_t net_size, padding_size = 0;
1449 int truncated;
1450
1451 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1452 &truncated);
1453
1454 /*
1455 * Absorb bad blocks immediately following this
1456 * partition also into the partition, such that
1457 * the next partition starts with a good block.
1458 */
1459 if (!truncated) {
1460 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1461 mtd->erasesize, &padding_size, &truncated);
1462 if (truncated)
1463 padding_size = 0;
1464 else
1465 padding_size -= mtd->erasesize;
1466 }
1467
1468 if (truncated) {
1469 printf("truncated partition %s to %lld bytes\n", part->name,
1470 (uint64_t) net_size + padding_size);
1471 }
1472
1473 part->size = net_size + padding_size;
1474 *next_offset = part->offset + part->size;
1475 }
1476
1477 /**
1478 * Adjust all of the partition sizes, such that all partitions are at least
1479 * as big as their mtdparts environment variable sizes and they each start
1480 * on a good block.
1481 *
1482 * @return 0 on success, 1 otherwise
1483 */
1484 static int spread_partitions(void)
1485 {
1486 struct list_head *dentry, *pentry;
1487 struct mtd_device *dev;
1488 struct part_info *part;
1489 struct mtd_info *mtd;
1490 int part_num;
1491 uint64_t cur_offs;
1492
1493 list_for_each(dentry, &devices) {
1494 dev = list_entry(dentry, struct mtd_device, link);
1495
1496 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1497 return 1;
1498
1499 part_num = 0;
1500 cur_offs = 0;
1501 list_for_each(pentry, &dev->parts) {
1502 part = list_entry(pentry, struct part_info, link);
1503
1504 debug("spread_partitions: device = %s%d, partition %d ="
1505 " (%s) 0x%08llx@0x%08llx\n",
1506 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1507 part_num, part->name, part->size,
1508 part->offset);
1509
1510 if (cur_offs > part->offset)
1511 part->offset = cur_offs;
1512
1513 spread_partition(mtd, part, &cur_offs);
1514
1515 part_num++;
1516 }
1517 }
1518
1519 index_partitions();
1520
1521 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1522 printf("generated mtdparts too long, resetting to null\n");
1523 return 1;
1524 }
1525 return 0;
1526 }
1527 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1528
1529 /**
1530 * The mtdparts variable tends to be long. If we need to access it
1531 * before the env is relocated, then we need to use our own stack
1532 * buffer. gd->env_buf will be too small.
1533 *
1534 * @param buf temporary buffer pointer MTDPARTS_MAXLEN long
1535 * @return mtdparts variable string, NULL if not found
1536 */
1537 static const char *env_get_mtdparts(char *buf)
1538 {
1539 if (gd->flags & GD_FLG_ENV_READY)
1540 return env_get("mtdparts");
1541 if (env_get_f("mtdparts", buf, MTDPARTS_MAXLEN) != -1)
1542 return buf;
1543 return NULL;
1544 }
1545
1546 /**
1547 * Accept character string describing mtd partitions and call device_parse()
1548 * for each entry. Add created devices to the global devices list.
1549 *
1550 * @param mtdparts string specifing mtd partitions
1551 * @return 0 on success, 1 otherwise
1552 */
1553 static int parse_mtdparts(const char *const mtdparts)
1554 {
1555 const char *p;
1556 struct mtd_device *dev;
1557 int err = 1;
1558 char tmp_parts[MTDPARTS_MAXLEN];
1559
1560 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", mtdparts);
1561
1562 /* delete all devices and partitions */
1563 if (mtd_devices_init() != 0) {
1564 printf("could not initialise device list\n");
1565 return err;
1566 }
1567
1568 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1569 p = env_get_mtdparts(tmp_parts);
1570 if (!p)
1571 p = mtdparts;
1572
1573 /* Skip the useless prefix, if any */
1574 if (strncmp(p, "mtdparts=", 9) == 0)
1575 p += 9;
1576
1577 while (*p != '\0') {
1578 err = 1;
1579 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1580 break;
1581
1582 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1583 dev->id->num, dev->id->mtd_id);
1584
1585 /* check if parsed device is already on the list */
1586 if (device_find(dev->id->type, dev->id->num) != NULL) {
1587 printf("device %s%d redefined, please correct mtdparts variable\n",
1588 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1589 break;
1590 }
1591
1592 list_add_tail(&dev->link, &devices);
1593 err = 0;
1594 }
1595 if (err == 1) {
1596 free(dev);
1597 device_delall(&devices);
1598 }
1599
1600 return err;
1601 }
1602
1603 /**
1604 * Parse provided string describing mtdids mapping (see file header for mtdids
1605 * variable format). Allocate memory for each entry and add all found entries
1606 * to the global mtdids list.
1607 *
1608 * @param ids mapping string
1609 * @return 0 on success, 1 otherwise
1610 */
1611 static int parse_mtdids(const char *const ids)
1612 {
1613 const char *p = ids;
1614 const char *mtd_id;
1615 int mtd_id_len;
1616 struct mtdids *id;
1617 struct list_head *entry, *n;
1618 struct mtdids *id_tmp;
1619 u8 type, num;
1620 u64 size;
1621 int ret = 1;
1622
1623 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1624
1625 /* clean global mtdids list */
1626 list_for_each_safe(entry, n, &mtdids) {
1627 id_tmp = list_entry(entry, struct mtdids, link);
1628 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1629 list_del(entry);
1630 free(id_tmp);
1631 }
1632 last_ids[0] = '\0';
1633 INIT_LIST_HEAD(&mtdids);
1634
1635 while(p && (*p != '\0')) {
1636
1637 ret = 1;
1638 /* parse 'nor'|'nand'|'onenand'|'spi-nand'<dev-num> */
1639 if (mtd_id_parse(p, &p, &type, &num) != 0)
1640 break;
1641
1642 if (*p != '=') {
1643 printf("mtdids: incorrect <dev-num>\n");
1644 break;
1645 }
1646 p++;
1647
1648 /* check if requested device exists */
1649 if (mtd_device_validate(type, num, &size) != 0)
1650 return 1;
1651
1652 /* locate <mtd-id> */
1653 mtd_id = p;
1654 if ((p = strchr(mtd_id, ',')) != NULL) {
1655 mtd_id_len = p - mtd_id + 1;
1656 p++;
1657 } else {
1658 mtd_id_len = strlen(mtd_id) + 1;
1659 }
1660 if (mtd_id_len == 0) {
1661 printf("mtdids: no <mtd-id> identifier\n");
1662 break;
1663 }
1664
1665 /* check if this id is already on the list */
1666 int double_entry = 0;
1667 list_for_each(entry, &mtdids) {
1668 id_tmp = list_entry(entry, struct mtdids, link);
1669 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1670 double_entry = 1;
1671 break;
1672 }
1673 }
1674 if (double_entry) {
1675 printf("device id %s%d redefined, please correct mtdids variable\n",
1676 MTD_DEV_TYPE(type), num);
1677 break;
1678 }
1679
1680 /* allocate mtdids structure */
1681 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1682 printf("out of memory\n");
1683 break;
1684 }
1685 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1686 id->num = num;
1687 id->type = type;
1688 id->size = size;
1689 id->mtd_id = (char *)(id + 1);
1690 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1691 id->mtd_id[mtd_id_len - 1] = '\0';
1692 INIT_LIST_HEAD(&id->link);
1693
1694 debug("+ id %s%d\t%16lld bytes\t%s\n",
1695 MTD_DEV_TYPE(id->type), id->num,
1696 id->size, id->mtd_id);
1697
1698 list_add_tail(&id->link, &mtdids);
1699 ret = 0;
1700 }
1701 if (ret == 1) {
1702 /* clean mtdids list and free allocated memory */
1703 list_for_each_safe(entry, n, &mtdids) {
1704 id_tmp = list_entry(entry, struct mtdids, link);
1705 list_del(entry);
1706 free(id_tmp);
1707 }
1708 return 1;
1709 }
1710
1711 return 0;
1712 }
1713
1714
1715 /**
1716 * Parse and initialize global mtdids mapping and create global
1717 * device/partition list.
1718 *
1719 * @return 0 on success, 1 otherwise
1720 */
1721 int mtdparts_init(void)
1722 {
1723 static int initialized = 0;
1724 const char *ids, *parts;
1725 const char *current_partition;
1726 int ids_changed;
1727 char tmp_ep[PARTITION_MAXLEN + 1];
1728 char tmp_parts[MTDPARTS_MAXLEN];
1729
1730 debug("\n---mtdparts_init---\n");
1731 if (!initialized) {
1732 INIT_LIST_HEAD(&mtdids);
1733 INIT_LIST_HEAD(&devices);
1734 memset(last_ids, 0, sizeof(last_ids));
1735 memset(last_parts, 0, sizeof(last_parts));
1736 memset(last_partition, 0, sizeof(last_partition));
1737 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
1738 board_mtdparts_default(&mtdids_default, &mtdparts_default);
1739 #endif
1740 use_defaults = 1;
1741 initialized = 1;
1742 }
1743
1744 /* get variables */
1745 ids = env_get("mtdids");
1746 parts = env_get_mtdparts(tmp_parts);
1747 current_partition = env_get("partition");
1748
1749 /* save it for later parsing, cannot rely on current partition pointer
1750 * as 'partition' variable may be updated during init */
1751 memset(tmp_parts, 0, sizeof(tmp_parts));
1752 memset(tmp_ep, 0, sizeof(tmp_ep));
1753 if (current_partition)
1754 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1755
1756 debug("last_ids : %s\n", last_ids);
1757 debug("env_ids : %s\n", ids);
1758 debug("last_parts: %s\n", last_parts);
1759 debug("env_parts : %s\n\n", parts);
1760
1761 debug("last_partition : %s\n", last_partition);
1762 debug("env_partition : %s\n", current_partition);
1763
1764 /* if mtdids variable is empty try to use defaults */
1765 if (!ids) {
1766 if (mtdids_default) {
1767 debug("mtdids variable not defined, using default\n");
1768 ids = mtdids_default;
1769 env_set("mtdids", (char *)ids);
1770 } else {
1771 printf("mtdids not defined, no default present\n");
1772 return 1;
1773 }
1774 }
1775 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1776 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1777 return 1;
1778 }
1779
1780 /* use defaults when mtdparts variable is not defined
1781 * once mtdparts is saved environment, drop use_defaults flag */
1782 if (!parts) {
1783 if (mtdparts_default && use_defaults) {
1784 parts = mtdparts_default;
1785 if (env_set("mtdparts", (char *)parts) == 0)
1786 use_defaults = 0;
1787 } else
1788 printf("mtdparts variable not set, see 'help mtdparts'\n");
1789 }
1790
1791 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1792 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1793 return 1;
1794 }
1795
1796 /* check if we have already parsed those mtdids */
1797 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1798 ids_changed = 0;
1799 } else {
1800 ids_changed = 1;
1801
1802 if (parse_mtdids(ids) != 0) {
1803 mtd_devices_init();
1804 return 1;
1805 }
1806
1807 /* ok it's good, save new ids */
1808 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1809 }
1810
1811 /* parse partitions if either mtdparts or mtdids were updated */
1812 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1813 if (parse_mtdparts(parts) != 0)
1814 return 1;
1815
1816 if (list_empty(&devices)) {
1817 printf("mtdparts_init: no valid partitions\n");
1818 return 1;
1819 }
1820
1821 /* ok it's good, save new parts */
1822 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1823
1824 /* reset first partition from first dev from the list as current */
1825 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1826 current_mtd_partnum = 0;
1827 current_save();
1828
1829 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1830 MTD_DEV_TYPE(current_mtd_dev->id->type),
1831 current_mtd_dev->id->num, current_mtd_partnum);
1832 }
1833
1834 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1835 if (!parts && (last_parts[0] != '\0'))
1836 return mtd_devices_init();
1837
1838 /* do not process current partition if mtdparts variable is null */
1839 if (!parts)
1840 return 0;
1841
1842 /* is current partition set in environment? if so, use it */
1843 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1844 struct part_info *p;
1845 struct mtd_device *cdev;
1846 u8 pnum;
1847
1848 debug("--- getting current partition: %s\n", tmp_ep);
1849
1850 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1851 current_mtd_dev = cdev;
1852 current_mtd_partnum = pnum;
1853 current_save();
1854 }
1855 } else if (env_get("partition") == NULL) {
1856 debug("no partition variable set, setting...\n");
1857 current_save();
1858 }
1859
1860 return 0;
1861 }
1862
1863 /**
1864 * Return pointer to the partition of a requested number from a requested
1865 * device.
1866 *
1867 * @param dev device that is to be searched for a partition
1868 * @param part_num requested partition number
1869 * @return pointer to the part_info, NULL otherwise
1870 */
1871 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1872 {
1873 struct list_head *entry;
1874 struct part_info *part;
1875 int num;
1876
1877 if (!dev)
1878 return NULL;
1879
1880 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1881 part_num, MTD_DEV_TYPE(dev->id->type),
1882 dev->id->num, dev->id->mtd_id);
1883
1884 if (part_num >= dev->num_parts) {
1885 printf("invalid partition number %d for device %s%d (%s)\n",
1886 part_num, MTD_DEV_TYPE(dev->id->type),
1887 dev->id->num, dev->id->mtd_id);
1888 return NULL;
1889 }
1890
1891 /* locate partition number, return it */
1892 num = 0;
1893 list_for_each(entry, &dev->parts) {
1894 part = list_entry(entry, struct part_info, link);
1895
1896 if (part_num == num++) {
1897 return part;
1898 }
1899 }
1900
1901 return NULL;
1902 }
1903
1904 /***************************************************/
1905 /* U-Boot commands */
1906 /***************************************************/
1907 /* command line only */
1908 /**
1909 * Routine implementing u-boot chpart command. Sets new current partition based
1910 * on the user supplied partition id. For partition id format see find_dev_and_part().
1911 *
1912 * @param cmdtp command internal data
1913 * @param flag command flag
1914 * @param argc number of arguments supplied to the command
1915 * @param argv arguments list
1916 * @return 0 on success, 1 otherwise
1917 */
1918 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1919 {
1920 /* command line only */
1921 struct mtd_device *dev;
1922 struct part_info *part;
1923 u8 pnum;
1924
1925 if (mtdparts_init() !=0)
1926 return 1;
1927
1928 if (argc < 2) {
1929 printf("no partition id specified\n");
1930 return 1;
1931 }
1932
1933 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1934 return 1;
1935
1936 current_mtd_dev = dev;
1937 current_mtd_partnum = pnum;
1938 current_save();
1939
1940 printf("partition changed to %s%d,%d\n",
1941 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1942
1943 return 0;
1944 }
1945
1946 /**
1947 * Routine implementing u-boot mtdparts command. Initialize/update default global
1948 * partition list and process user partition request (list, add, del).
1949 *
1950 * @param cmdtp command internal data
1951 * @param flag command flag
1952 * @param argc number of arguments supplied to the command
1953 * @param argv arguments list
1954 * @return 0 on success, 1 otherwise
1955 */
1956 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1957 char * const argv[])
1958 {
1959 if (argc == 2) {
1960 if (strcmp(argv[1], "default") == 0) {
1961 env_set("mtdids", NULL);
1962 env_set("mtdparts", NULL);
1963 env_set("partition", NULL);
1964 use_defaults = 1;
1965
1966 mtdparts_init();
1967 return 0;
1968 } else if (strcmp(argv[1], "delall") == 0) {
1969 /* this may be the first run, initialize lists if needed */
1970 mtdparts_init();
1971
1972 env_set("mtdparts", NULL);
1973
1974 /* mtd_devices_init() calls current_save() */
1975 return mtd_devices_init();
1976 }
1977 }
1978
1979 /* make sure we are in sync with env variables */
1980 if (mtdparts_init() != 0)
1981 return 1;
1982
1983 if (argc == 1) {
1984 list_partitions();
1985 return 0;
1986 }
1987
1988 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1989 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1990 #define PART_ADD_DESC_MAXLEN 64
1991 char tmpbuf[PART_ADD_DESC_MAXLEN];
1992 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1993 struct mtd_info *mtd;
1994 uint64_t next_offset;
1995 #endif
1996 u8 type, num, len;
1997 struct mtd_device *dev;
1998 struct mtd_device *dev_tmp;
1999 struct mtdids *id;
2000 struct part_info *p;
2001
2002 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
2003 return 1;
2004
2005 if ((id = id_find(type, num)) == NULL) {
2006 printf("no such device %s defined in mtdids variable\n", argv[2]);
2007 return 1;
2008 }
2009
2010 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
2011 len += strlen(argv[3]); /* size@offset */
2012 len += strlen(argv[4]) + 2; /* '(' name ')' */
2013 if (argv[5] && (strlen(argv[5]) == 2))
2014 len += 2; /* 'ro' */
2015
2016 if (len >= PART_ADD_DESC_MAXLEN) {
2017 printf("too long partition description\n");
2018 return 1;
2019 }
2020 sprintf(tmpbuf, "%s:%s(%s)%s",
2021 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
2022 debug("add tmpbuf: %s\n", tmpbuf);
2023
2024 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
2025 return 1;
2026
2027 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2028 dev->id->num, dev->id->mtd_id);
2029
2030 p = list_entry(dev->parts.next, struct part_info, link);
2031
2032 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2033 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2034 return 1;
2035
2036 if (!strcmp(&argv[1][3], ".spread")) {
2037 spread_partition(mtd, p, &next_offset);
2038 debug("increased %s to %llu bytes\n", p->name, p->size);
2039 }
2040 #endif
2041
2042 dev_tmp = device_find(dev->id->type, dev->id->num);
2043 if (dev_tmp == NULL) {
2044 device_add(dev);
2045 } else if (part_add(dev_tmp, p) != 0) {
2046 /* merge new partition with existing ones*/
2047 device_del(dev);
2048 return 1;
2049 }
2050
2051 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2052 printf("generated mtdparts too long, resetting to null\n");
2053 return 1;
2054 }
2055
2056 return 0;
2057 }
2058
2059 /* mtdparts del part-id */
2060 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2061 debug("del: part-id = %s\n", argv[2]);
2062
2063 return delete_partition(argv[2]);
2064 }
2065
2066 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2067 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2068 return spread_partitions();
2069 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2070
2071 return CMD_RET_USAGE;
2072 }
2073
2074 /***************************************************/
2075 U_BOOT_CMD(
2076 chpart, 2, 0, do_chpart,
2077 "change active partition",
2078 "part-id\n"
2079 " - change active partition (e.g. part-id = nand0,1)"
2080 );
2081
2082 #ifdef CONFIG_SYS_LONGHELP
2083 static char mtdparts_help_text[] =
2084 "\n"
2085 " - list partition table\n"
2086 "mtdparts delall\n"
2087 " - delete all partitions\n"
2088 "mtdparts del part-id\n"
2089 " - delete partition (e.g. part-id = nand0,1)\n"
2090 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2091 " - add partition\n"
2092 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2093 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2094 " - add partition, padding size by skipping bad blocks\n"
2095 #endif
2096 "mtdparts default\n"
2097 " - reset partition table to defaults\n"
2098 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2099 "mtdparts spread\n"
2100 " - adjust the sizes of the partitions so they are\n"
2101 " at least as big as the mtdparts variable specifies\n"
2102 " and they each start on a good block\n\n"
2103 #else
2104 "\n"
2105 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2106 "-----\n\n"
2107 "this command uses three environment variables:\n\n"
2108 "'partition' - keeps current partition identifier\n\n"
2109 "partition := <part-id>\n"
2110 "<part-id> := <dev-id>,part_num\n\n"
2111 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2112 "mtdids=<idmap>[,<idmap>,...]\n\n"
2113 "<idmap> := <dev-id>=<mtd-id>\n"
2114 "<dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>\n"
2115 "<dev-num> := mtd device number, 0...\n"
2116 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2117 "'mtdparts' - partition list\n\n"
2118 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2119 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2120 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2121 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2122 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2123 "<offset> := partition start offset within the device\n"
2124 "<name> := '(' NAME ')'\n"
2125 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2126 #endif
2127
2128 U_BOOT_CMD(
2129 mtdparts, 6, 0, do_mtdparts,
2130 "define flash/nand partitions", mtdparts_help_text
2131 );
2132 /***************************************************/
2133