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