1 /*
2 * (C) Copyright 2002
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4 *
5 * (C) Copyright 2002
6 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
7 *
8 * (C) Copyright 2003
9 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
10 *
11 * (C) Copyright 2005
12 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
13 *
14 * Added support for reading flash partition table from environment.
15 * Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
16 * kernel tree.
17 *
18 * (C) Copyright 2008
19 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
20 *
21 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
22 * Copyright 2002 SYSGO Real-Time Solutions GmbH
23 *
24 * SPDX-License-Identifier: GPL-2.0+
25 */
26
27 /*
28 * Three environment variables are used by the parsing routines:
29 *
30 * 'partition' - keeps current partition identifier
31 *
32 * partition := <part-id>
33 * <part-id> := <dev-id>,part_num
34 *
35 *
36 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
37 *
38 * mtdids=<idmap>[,<idmap>,...]
39 *
40 * <idmap> := <dev-id>=<mtd-id>
41 * <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>
42 * <dev-num> := mtd device number, 0...
43 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
44 *
45 *
46 * 'mtdparts' - partition list
47 *
48 * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
49 *
50 * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
51 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
52 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
53 * <size> := standard linux memsize OR '-' to denote all remaining space
54 * <offset> := partition start offset within the device
55 * <name> := '(' NAME ')'
56 * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
57 *
58 * Notes:
59 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
60 * - if the above variables are not set defaults for a given target are used
61 *
62 * Examples:
63 *
64 * 1 NOR Flash, with 1 single writable partition:
65 * mtdids=nor0=edb7312-nor
66 * mtdparts=mtdparts=edb7312-nor:-
67 *
68 * 1 NOR Flash with 2 partitions, 1 NAND with one
69 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
70 * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
71 *
72 */
73
74 #include <common.h>
75 #include <command.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 strcpy(p, "mtdparts=");
1104 p += 9;
1105
1106 list_for_each(dentry, &devices) {
1107 dev = list_entry(dentry, struct mtd_device, link);
1108
1109 /* copy mtd_id */
1110 len = strlen(dev->id->mtd_id) + 1;
1111 if (len > maxlen)
1112 goto cleanup;
1113 memcpy(p, dev->id->mtd_id, len - 1);
1114 p += len - 1;
1115 *(p++) = ':';
1116 maxlen -= len;
1117
1118 /* format partitions */
1119 prev_part = NULL;
1120 part_cnt = 0;
1121 list_for_each(pentry, &dev->parts) {
1122 part = list_entry(pentry, struct part_info, link);
1123 size = part->size;
1124 offset = part->offset;
1125 part_cnt++;
1126
1127 /* partition size */
1128 memsize_format(tmpbuf, size);
1129 len = strlen(tmpbuf);
1130 if (len > maxlen)
1131 goto cleanup;
1132 memcpy(p, tmpbuf, len);
1133 p += len;
1134 maxlen -= len;
1135
1136
1137 /* add offset only when there is a gap between
1138 * partitions */
1139 if ((!prev_part && (offset != 0)) ||
1140 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1141
1142 memsize_format(tmpbuf, offset);
1143 len = strlen(tmpbuf) + 1;
1144 if (len > maxlen)
1145 goto cleanup;
1146 *(p++) = '@';
1147 memcpy(p, tmpbuf, len - 1);
1148 p += len - 1;
1149 maxlen -= len;
1150 }
1151
1152 /* copy name only if user supplied */
1153 if(!part->auto_name) {
1154 len = strlen(part->name) + 2;
1155 if (len > maxlen)
1156 goto cleanup;
1157
1158 *(p++) = '(';
1159 memcpy(p, part->name, len - 2);
1160 p += len - 2;
1161 *(p++) = ')';
1162 maxlen -= len;
1163 }
1164
1165 /* ro mask flag */
1166 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1167 len = 2;
1168 if (len > maxlen)
1169 goto cleanup;
1170 *(p++) = 'r';
1171 *(p++) = 'o';
1172 maxlen -= 2;
1173 }
1174
1175 /* print ',' separator if there are other partitions
1176 * following */
1177 if (dev->num_parts > part_cnt) {
1178 if (1 > maxlen)
1179 goto cleanup;
1180 *(p++) = ',';
1181 maxlen--;
1182 }
1183 prev_part = part;
1184 }
1185 /* print ';' separator if there are other devices following */
1186 if (dentry->next != &devices) {
1187 if (1 > maxlen)
1188 goto cleanup;
1189 *(p++) = ';';
1190 maxlen--;
1191 }
1192 }
1193
1194 /* we still have at least one char left, as we decremented maxlen at
1195 * the begining */
1196 *p = '\0';
1197
1198 return 0;
1199
1200 cleanup:
1201 last_parts[0] = '\0';
1202 return 1;
1203 }
1204
1205 /**
1206 * Call generate_mtdparts to process all devices and generate corresponding
1207 * mtdparts string, save it in mtdparts environment variable.
1208 *
1209 * @param buf output buffer holding generated mtdparts string (output)
1210 * @param buflen buffer size
1211 * @return 0 on success, 1 otherwise
1212 */
generate_mtdparts_save(char * buf,u32 buflen)1213 static int generate_mtdparts_save(char *buf, u32 buflen)
1214 {
1215 int ret;
1216
1217 ret = generate_mtdparts(buf, buflen);
1218
1219 if ((buf[0] != '\0') && (ret == 0))
1220 env_set("mtdparts", buf);
1221 else
1222 env_set("mtdparts", NULL);
1223
1224 return ret;
1225 }
1226
1227 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1228 /**
1229 * Get the net size (w/o bad blocks) of the given partition.
1230 *
1231 * @param mtd the mtd info
1232 * @param part the partition
1233 * @return the calculated net size of this partition
1234 */
net_part_size(struct mtd_info * mtd,struct part_info * part)1235 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1236 {
1237 uint64_t i, net_size = 0;
1238
1239 if (!mtd->block_isbad)
1240 return part->size;
1241
1242 for (i = 0; i < part->size; i += mtd->erasesize) {
1243 if (!mtd->block_isbad(mtd, part->offset + i))
1244 net_size += mtd->erasesize;
1245 }
1246
1247 return net_size;
1248 }
1249 #endif
1250
print_partition_table(void)1251 static void print_partition_table(void)
1252 {
1253 struct list_head *dentry, *pentry;
1254 struct part_info *part;
1255 struct mtd_device *dev;
1256 int part_num;
1257
1258 list_for_each(dentry, &devices) {
1259 dev = list_entry(dentry, struct mtd_device, link);
1260 /* list partitions for given device */
1261 part_num = 0;
1262 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1263 struct mtd_info *mtd;
1264
1265 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1266 return;
1267
1268 printf("\ndevice %s%d <%s>, # parts = %d\n",
1269 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1270 dev->id->mtd_id, dev->num_parts);
1271 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1272
1273 list_for_each(pentry, &dev->parts) {
1274 u32 net_size;
1275 char *size_note;
1276
1277 part = list_entry(pentry, struct part_info, link);
1278 net_size = net_part_size(mtd, part);
1279 size_note = part->size == net_size ? " " : " (!)";
1280 printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n",
1281 part_num, part->name, part->size,
1282 net_size, size_note, part->offset,
1283 part->mask_flags);
1284 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1285 printf("\ndevice %s%d <%s>, # parts = %d\n",
1286 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1287 dev->id->mtd_id, dev->num_parts);
1288 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1289
1290 list_for_each(pentry, &dev->parts) {
1291 part = list_entry(pentry, struct part_info, link);
1292 printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1293 part_num, part->name, part->size,
1294 part->offset, part->mask_flags);
1295 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1296 part_num++;
1297 }
1298 }
1299
1300 if (list_empty(&devices))
1301 printf("no partitions defined\n");
1302 }
1303
1304 /**
1305 * Format and print out a partition list for each device from global device
1306 * list.
1307 */
1308 static void list_partitions(void)
1309 {
1310 struct part_info *part;
1311
1312 debug("\n---list_partitions---\n");
1313 print_partition_table();
1314
1315 /* current_mtd_dev is not NULL only when we have non empty device list */
1316 if (current_mtd_dev) {
1317 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1318 if (part) {
1319 printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1320 MTD_DEV_TYPE(current_mtd_dev->id->type),
1321 current_mtd_dev->id->num, current_mtd_partnum,
1322 part->name, part->size, part->offset);
1323 } else {
1324 printf("could not get current partition info\n\n");
1325 }
1326 }
1327
1328 printf("\ndefaults:\n");
1329 printf("mtdids : %s\n",
1330 mtdids_default ? mtdids_default : "none");
1331 /*
1332 * Using printf() here results in printbuffer overflow
1333 * if default mtdparts string is greater than console
1334 * printbuffer. Use puts() to prevent system crashes.
1335 */
1336 puts("mtdparts: ");
1337 puts(mtdparts_default ? mtdparts_default : "none");
1338 puts("\n");
1339 }
1340
1341 /**
1342 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1343 * corresponding device and verify partition number.
1344 *
1345 * @param id string describing device and partition or partition name
1346 * @param dev pointer to the requested device (output)
1347 * @param part_num verified partition number (output)
1348 * @param part pointer to requested partition (output)
1349 * @return 0 on success, 1 otherwise
1350 */
1351 int find_dev_and_part(const char *id, struct mtd_device **dev,
1352 u8 *part_num, struct part_info **part)
1353 {
1354 struct list_head *dentry, *pentry;
1355 u8 type, dnum, pnum;
1356 const char *p;
1357
1358 debug("--- find_dev_and_part ---\nid = %s\n", id);
1359
1360 list_for_each(dentry, &devices) {
1361 *part_num = 0;
1362 *dev = list_entry(dentry, struct mtd_device, link);
1363 list_for_each(pentry, &(*dev)->parts) {
1364 *part = list_entry(pentry, struct part_info, link);
1365 if (strcmp((*part)->name, id) == 0)
1366 return 0;
1367 (*part_num)++;
1368 }
1369 }
1370
1371 p = id;
1372 *dev = NULL;
1373 *part = NULL;
1374 *part_num = 0;
1375
1376 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1377 return 1;
1378
1379 if ((*p++ != ',') || (*p == '\0')) {
1380 printf("no partition number specified\n");
1381 return 1;
1382 }
1383 pnum = simple_strtoul(p, (char **)&p, 0);
1384 if (*p != '\0') {
1385 printf("unexpected trailing character '%c'\n", *p);
1386 return 1;
1387 }
1388
1389 if ((*dev = device_find(type, dnum)) == NULL) {
1390 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1391 return 1;
1392 }
1393
1394 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1395 printf("no such partition\n");
1396 *dev = NULL;
1397 return 1;
1398 }
1399
1400 *part_num = pnum;
1401
1402 return 0;
1403 }
1404
1405 /**
1406 * Find and delete partition. For partition id format see find_dev_and_part().
1407 *
1408 * @param id string describing device and partition
1409 * @return 0 on success, 1 otherwise
1410 */
1411 static int delete_partition(const char *id)
1412 {
1413 u8 pnum;
1414 struct mtd_device *dev;
1415 struct part_info *part;
1416
1417 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1418
1419 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1420 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1421 part->name, part->size, part->offset);
1422
1423 if (part_del(dev, part) != 0)
1424 return 1;
1425
1426 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1427 printf("generated mtdparts too long, resetting to null\n");
1428 return 1;
1429 }
1430 return 0;
1431 }
1432
1433 printf("partition %s not found\n", id);
1434 return 1;
1435 }
1436
1437 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1438 /**
1439 * Increase the size of the given partition so that it's net size is at least
1440 * as large as the size member and such that the next partition would start on a
1441 * good block if it were adjacent to this partition.
1442 *
1443 * @param mtd the mtd device
1444 * @param part the partition
1445 * @param next_offset pointer to the offset of the next partition after this
1446 * partition's size has been modified (output)
1447 */
1448 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1449 uint64_t *next_offset)
1450 {
1451 uint64_t net_size, padding_size = 0;
1452 int truncated;
1453
1454 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1455 &truncated);
1456
1457 /*
1458 * Absorb bad blocks immediately following this
1459 * partition also into the partition, such that
1460 * the next partition starts with a good block.
1461 */
1462 if (!truncated) {
1463 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1464 mtd->erasesize, &padding_size, &truncated);
1465 if (truncated)
1466 padding_size = 0;
1467 else
1468 padding_size -= mtd->erasesize;
1469 }
1470
1471 if (truncated) {
1472 printf("truncated partition %s to %lld bytes\n", part->name,
1473 (uint64_t) net_size + padding_size);
1474 }
1475
1476 part->size = net_size + padding_size;
1477 *next_offset = part->offset + part->size;
1478 }
1479
1480 /**
1481 * Adjust all of the partition sizes, such that all partitions are at least
1482 * as big as their mtdparts environment variable sizes and they each start
1483 * on a good block.
1484 *
1485 * @return 0 on success, 1 otherwise
1486 */
1487 static int spread_partitions(void)
1488 {
1489 struct list_head *dentry, *pentry;
1490 struct mtd_device *dev;
1491 struct part_info *part;
1492 struct mtd_info *mtd;
1493 int part_num;
1494 uint64_t cur_offs;
1495
1496 list_for_each(dentry, &devices) {
1497 dev = list_entry(dentry, struct mtd_device, link);
1498
1499 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1500 return 1;
1501
1502 part_num = 0;
1503 cur_offs = 0;
1504 list_for_each(pentry, &dev->parts) {
1505 part = list_entry(pentry, struct part_info, link);
1506
1507 debug("spread_partitions: device = %s%d, partition %d ="
1508 " (%s) 0x%08llx@0x%08llx\n",
1509 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1510 part_num, part->name, part->size,
1511 part->offset);
1512
1513 if (cur_offs > part->offset)
1514 part->offset = cur_offs;
1515
1516 spread_partition(mtd, part, &cur_offs);
1517
1518 part_num++;
1519 }
1520 }
1521
1522 index_partitions();
1523
1524 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1525 printf("generated mtdparts too long, resetting to null\n");
1526 return 1;
1527 }
1528 return 0;
1529 }
1530 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1531
1532 /**
1533 * The mtdparts variable tends to be long. If we need to access it
1534 * before the env is relocated, then we need to use our own stack
1535 * buffer. gd->env_buf will be too small.
1536 *
1537 * @param buf temporary buffer pointer MTDPARTS_MAXLEN long
1538 * @return mtdparts variable string, NULL if not found
1539 */
1540 static const char *env_get_mtdparts(char *buf)
1541 {
1542 if (gd->flags & GD_FLG_ENV_READY)
1543 return env_get("mtdparts");
1544 if (env_get_f("mtdparts", buf, MTDPARTS_MAXLEN) != -1)
1545 return buf;
1546 return NULL;
1547 }
1548
1549 /**
1550 * Accept character string describing mtd partitions and call device_parse()
1551 * for each entry. Add created devices to the global devices list.
1552 *
1553 * @param mtdparts string specifing mtd partitions
1554 * @return 0 on success, 1 otherwise
1555 */
1556 static int parse_mtdparts(const char *const mtdparts)
1557 {
1558 const char *p;
1559 struct mtd_device *dev;
1560 int err = 1;
1561 char tmp_parts[MTDPARTS_MAXLEN];
1562
1563 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", mtdparts);
1564
1565 /* delete all devices and partitions */
1566 if (mtd_devices_init() != 0) {
1567 printf("could not initialise device list\n");
1568 return err;
1569 }
1570
1571 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1572 p = env_get_mtdparts(tmp_parts);
1573 if (!p)
1574 p = mtdparts;
1575
1576 if (strncmp(p, "mtdparts=", 9) != 0) {
1577 printf("mtdparts variable doesn't start with 'mtdparts='\n");
1578 return err;
1579 }
1580 p += 9;
1581
1582 while (*p != '\0') {
1583 err = 1;
1584 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1585 break;
1586
1587 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1588 dev->id->num, dev->id->mtd_id);
1589
1590 /* check if parsed device is already on the list */
1591 if (device_find(dev->id->type, dev->id->num) != NULL) {
1592 printf("device %s%d redefined, please correct mtdparts variable\n",
1593 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1594 break;
1595 }
1596
1597 list_add_tail(&dev->link, &devices);
1598 err = 0;
1599 }
1600 if (err == 1) {
1601 free(dev);
1602 device_delall(&devices);
1603 }
1604
1605 return err;
1606 }
1607
1608 /**
1609 * Parse provided string describing mtdids mapping (see file header for mtdids
1610 * variable format). Allocate memory for each entry and add all found entries
1611 * to the global mtdids list.
1612 *
1613 * @param ids mapping string
1614 * @return 0 on success, 1 otherwise
1615 */
1616 static int parse_mtdids(const char *const ids)
1617 {
1618 const char *p = ids;
1619 const char *mtd_id;
1620 int mtd_id_len;
1621 struct mtdids *id;
1622 struct list_head *entry, *n;
1623 struct mtdids *id_tmp;
1624 u8 type, num;
1625 u64 size;
1626 int ret = 1;
1627
1628 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1629
1630 /* clean global mtdids list */
1631 list_for_each_safe(entry, n, &mtdids) {
1632 id_tmp = list_entry(entry, struct mtdids, link);
1633 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1634 list_del(entry);
1635 free(id_tmp);
1636 }
1637 last_ids[0] = '\0';
1638 INIT_LIST_HEAD(&mtdids);
1639
1640 while(p && (*p != '\0')) {
1641
1642 ret = 1;
1643 /* parse 'nor'|'nand'|'onenand'|'spi-nand'<dev-num> */
1644 if (mtd_id_parse(p, &p, &type, &num) != 0)
1645 break;
1646
1647 if (*p != '=') {
1648 printf("mtdids: incorrect <dev-num>\n");
1649 break;
1650 }
1651 p++;
1652
1653 /* check if requested device exists */
1654 if (mtd_device_validate(type, num, &size) != 0)
1655 return 1;
1656
1657 /* locate <mtd-id> */
1658 mtd_id = p;
1659 if ((p = strchr(mtd_id, ',')) != NULL) {
1660 mtd_id_len = p - mtd_id + 1;
1661 p++;
1662 } else {
1663 mtd_id_len = strlen(mtd_id) + 1;
1664 }
1665 if (mtd_id_len == 0) {
1666 printf("mtdids: no <mtd-id> identifier\n");
1667 break;
1668 }
1669
1670 /* check if this id is already on the list */
1671 int double_entry = 0;
1672 list_for_each(entry, &mtdids) {
1673 id_tmp = list_entry(entry, struct mtdids, link);
1674 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1675 double_entry = 1;
1676 break;
1677 }
1678 }
1679 if (double_entry) {
1680 printf("device id %s%d redefined, please correct mtdids variable\n",
1681 MTD_DEV_TYPE(type), num);
1682 break;
1683 }
1684
1685 /* allocate mtdids structure */
1686 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1687 printf("out of memory\n");
1688 break;
1689 }
1690 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1691 id->num = num;
1692 id->type = type;
1693 id->size = size;
1694 id->mtd_id = (char *)(id + 1);
1695 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1696 id->mtd_id[mtd_id_len - 1] = '\0';
1697 INIT_LIST_HEAD(&id->link);
1698
1699 debug("+ id %s%d\t%16lld bytes\t%s\n",
1700 MTD_DEV_TYPE(id->type), id->num,
1701 id->size, id->mtd_id);
1702
1703 list_add_tail(&id->link, &mtdids);
1704 ret = 0;
1705 }
1706 if (ret == 1) {
1707 /* clean mtdids list and free allocated memory */
1708 list_for_each_safe(entry, n, &mtdids) {
1709 id_tmp = list_entry(entry, struct mtdids, link);
1710 list_del(entry);
1711 free(id_tmp);
1712 }
1713 return 1;
1714 }
1715
1716 return 0;
1717 }
1718
1719
1720 /**
1721 * Parse and initialize global mtdids mapping and create global
1722 * device/partition list.
1723 *
1724 * @return 0 on success, 1 otherwise
1725 */
1726 int mtdparts_init(void)
1727 {
1728 static int initialized = 0;
1729 const char *ids, *parts;
1730 const char *current_partition;
1731 int ids_changed;
1732 char tmp_ep[PARTITION_MAXLEN + 1];
1733 char tmp_parts[MTDPARTS_MAXLEN];
1734
1735 debug("\n---mtdparts_init---\n");
1736 if (!initialized) {
1737 INIT_LIST_HEAD(&mtdids);
1738 INIT_LIST_HEAD(&devices);
1739 memset(last_ids, 0, sizeof(last_ids));
1740 memset(last_parts, 0, sizeof(last_parts));
1741 memset(last_partition, 0, sizeof(last_partition));
1742 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
1743 board_mtdparts_default(&mtdids_default, &mtdparts_default);
1744 #endif
1745 use_defaults = 1;
1746 initialized = 1;
1747 }
1748
1749 /* get variables */
1750 ids = env_get("mtdids");
1751 parts = env_get_mtdparts(tmp_parts);
1752 current_partition = env_get("partition");
1753
1754 /* save it for later parsing, cannot rely on current partition pointer
1755 * as 'partition' variable may be updated during init */
1756 memset(tmp_parts, 0, sizeof(tmp_parts));
1757 memset(tmp_ep, 0, sizeof(tmp_ep));
1758 if (current_partition)
1759 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1760
1761 debug("last_ids : %s\n", last_ids);
1762 debug("env_ids : %s\n", ids);
1763 debug("last_parts: %s\n", last_parts);
1764 debug("env_parts : %s\n\n", parts);
1765
1766 debug("last_partition : %s\n", last_partition);
1767 debug("env_partition : %s\n", current_partition);
1768
1769 /* if mtdids variable is empty try to use defaults */
1770 if (!ids) {
1771 if (mtdids_default) {
1772 debug("mtdids variable not defined, using default\n");
1773 ids = mtdids_default;
1774 env_set("mtdids", (char *)ids);
1775 } else {
1776 printf("mtdids not defined, no default present\n");
1777 return 1;
1778 }
1779 }
1780 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1781 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1782 return 1;
1783 }
1784
1785 /* use defaults when mtdparts variable is not defined
1786 * once mtdparts is saved environment, drop use_defaults flag */
1787 if (!parts) {
1788 if (mtdparts_default && use_defaults) {
1789 parts = mtdparts_default;
1790 if (env_set("mtdparts", (char *)parts) == 0)
1791 use_defaults = 0;
1792 } else
1793 printf("mtdparts variable not set, see 'help mtdparts'\n");
1794 }
1795
1796 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1797 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1798 return 1;
1799 }
1800
1801 /* check if we have already parsed those mtdids */
1802 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1803 ids_changed = 0;
1804 } else {
1805 ids_changed = 1;
1806
1807 if (parse_mtdids(ids) != 0) {
1808 mtd_devices_init();
1809 return 1;
1810 }
1811
1812 /* ok it's good, save new ids */
1813 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1814 }
1815
1816 /* parse partitions if either mtdparts or mtdids were updated */
1817 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1818 if (parse_mtdparts(parts) != 0)
1819 return 1;
1820
1821 if (list_empty(&devices)) {
1822 printf("mtdparts_init: no valid partitions\n");
1823 return 1;
1824 }
1825
1826 /* ok it's good, save new parts */
1827 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1828
1829 /* reset first partition from first dev from the list as current */
1830 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1831 current_mtd_partnum = 0;
1832 current_save();
1833
1834 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1835 MTD_DEV_TYPE(current_mtd_dev->id->type),
1836 current_mtd_dev->id->num, current_mtd_partnum);
1837 }
1838
1839 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1840 if (!parts && (last_parts[0] != '\0'))
1841 return mtd_devices_init();
1842
1843 /* do not process current partition if mtdparts variable is null */
1844 if (!parts)
1845 return 0;
1846
1847 /* is current partition set in environment? if so, use it */
1848 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1849 struct part_info *p;
1850 struct mtd_device *cdev;
1851 u8 pnum;
1852
1853 debug("--- getting current partition: %s\n", tmp_ep);
1854
1855 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1856 current_mtd_dev = cdev;
1857 current_mtd_partnum = pnum;
1858 current_save();
1859 }
1860 } else if (env_get("partition") == NULL) {
1861 debug("no partition variable set, setting...\n");
1862 current_save();
1863 }
1864
1865 return 0;
1866 }
1867
1868 /**
1869 * Return pointer to the partition of a requested number from a requested
1870 * device.
1871 *
1872 * @param dev device that is to be searched for a partition
1873 * @param part_num requested partition number
1874 * @return pointer to the part_info, NULL otherwise
1875 */
1876 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1877 {
1878 struct list_head *entry;
1879 struct part_info *part;
1880 int num;
1881
1882 if (!dev)
1883 return NULL;
1884
1885 debug("\n--- mtd_part_info: 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
1889 if (part_num >= dev->num_parts) {
1890 printf("invalid partition number %d for device %s%d (%s)\n",
1891 part_num, MTD_DEV_TYPE(dev->id->type),
1892 dev->id->num, dev->id->mtd_id);
1893 return NULL;
1894 }
1895
1896 /* locate partition number, return it */
1897 num = 0;
1898 list_for_each(entry, &dev->parts) {
1899 part = list_entry(entry, struct part_info, link);
1900
1901 if (part_num == num++) {
1902 return part;
1903 }
1904 }
1905
1906 return NULL;
1907 }
1908
1909 /***************************************************/
1910 /* U-Boot commands */
1911 /***************************************************/
1912 /* command line only */
1913 /**
1914 * Routine implementing u-boot chpart command. Sets new current partition based
1915 * on the user supplied partition id. For partition id format see find_dev_and_part().
1916 *
1917 * @param cmdtp command internal data
1918 * @param flag command flag
1919 * @param argc number of arguments supplied to the command
1920 * @param argv arguments list
1921 * @return 0 on success, 1 otherwise
1922 */
1923 static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
1924 {
1925 /* command line only */
1926 struct mtd_device *dev;
1927 struct part_info *part;
1928 u8 pnum;
1929
1930 if (mtdparts_init() !=0)
1931 return 1;
1932
1933 if (argc < 2) {
1934 printf("no partition id specified\n");
1935 return 1;
1936 }
1937
1938 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1939 return 1;
1940
1941 current_mtd_dev = dev;
1942 current_mtd_partnum = pnum;
1943 current_save();
1944
1945 printf("partition changed to %s%d,%d\n",
1946 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1947
1948 return 0;
1949 }
1950
1951 /**
1952 * Routine implementing u-boot mtdparts command. Initialize/update default global
1953 * partition list and process user partition request (list, add, del).
1954 *
1955 * @param cmdtp command internal data
1956 * @param flag command flag
1957 * @param argc number of arguments supplied to the command
1958 * @param argv arguments list
1959 * @return 0 on success, 1 otherwise
1960 */
1961 static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc,
1962 char * const argv[])
1963 {
1964 if (argc == 2) {
1965 if (strcmp(argv[1], "default") == 0) {
1966 env_set("mtdids", NULL);
1967 env_set("mtdparts", NULL);
1968 env_set("partition", NULL);
1969 use_defaults = 1;
1970
1971 mtdparts_init();
1972 return 0;
1973 } else if (strcmp(argv[1], "delall") == 0) {
1974 /* this may be the first run, initialize lists if needed */
1975 mtdparts_init();
1976
1977 env_set("mtdparts", NULL);
1978
1979 /* mtd_devices_init() calls current_save() */
1980 return mtd_devices_init();
1981 }
1982 }
1983
1984 /* make sure we are in sync with env variables */
1985 if (mtdparts_init() != 0)
1986 return 1;
1987
1988 if (argc == 1) {
1989 list_partitions();
1990 return 0;
1991 }
1992
1993 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1994 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1995 #define PART_ADD_DESC_MAXLEN 64
1996 char tmpbuf[PART_ADD_DESC_MAXLEN];
1997 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1998 struct mtd_info *mtd;
1999 uint64_t next_offset;
2000 #endif
2001 u8 type, num, len;
2002 struct mtd_device *dev;
2003 struct mtd_device *dev_tmp;
2004 struct mtdids *id;
2005 struct part_info *p;
2006
2007 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
2008 return 1;
2009
2010 if ((id = id_find(type, num)) == NULL) {
2011 printf("no such device %s defined in mtdids variable\n", argv[2]);
2012 return 1;
2013 }
2014
2015 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
2016 len += strlen(argv[3]); /* size@offset */
2017 len += strlen(argv[4]) + 2; /* '(' name ')' */
2018 if (argv[5] && (strlen(argv[5]) == 2))
2019 len += 2; /* 'ro' */
2020
2021 if (len >= PART_ADD_DESC_MAXLEN) {
2022 printf("too long partition description\n");
2023 return 1;
2024 }
2025 sprintf(tmpbuf, "%s:%s(%s)%s",
2026 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
2027 debug("add tmpbuf: %s\n", tmpbuf);
2028
2029 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
2030 return 1;
2031
2032 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2033 dev->id->num, dev->id->mtd_id);
2034
2035 p = list_entry(dev->parts.next, struct part_info, link);
2036
2037 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2038 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2039 return 1;
2040
2041 if (!strcmp(&argv[1][3], ".spread")) {
2042 spread_partition(mtd, p, &next_offset);
2043 debug("increased %s to %llu bytes\n", p->name, p->size);
2044 }
2045 #endif
2046
2047 dev_tmp = device_find(dev->id->type, dev->id->num);
2048 if (dev_tmp == NULL) {
2049 device_add(dev);
2050 } else if (part_add(dev_tmp, p) != 0) {
2051 /* merge new partition with existing ones*/
2052 device_del(dev);
2053 return 1;
2054 }
2055
2056 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2057 printf("generated mtdparts too long, resetting to null\n");
2058 return 1;
2059 }
2060
2061 return 0;
2062 }
2063
2064 /* mtdparts del part-id */
2065 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2066 debug("del: part-id = %s\n", argv[2]);
2067
2068 return delete_partition(argv[2]);
2069 }
2070
2071 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2072 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2073 return spread_partitions();
2074 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2075
2076 return CMD_RET_USAGE;
2077 }
2078
2079 /***************************************************/
2080 U_BOOT_CMD(
2081 chpart, 2, 0, do_chpart,
2082 "change active partition",
2083 "part-id\n"
2084 " - change active partition (e.g. part-id = nand0,1)"
2085 );
2086
2087 #ifdef CONFIG_SYS_LONGHELP
2088 static char mtdparts_help_text[] =
2089 "\n"
2090 " - list partition table\n"
2091 "mtdparts delall\n"
2092 " - delete all partitions\n"
2093 "mtdparts del part-id\n"
2094 " - delete partition (e.g. part-id = nand0,1)\n"
2095 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2096 " - add partition\n"
2097 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2098 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2099 " - add partition, padding size by skipping bad blocks\n"
2100 #endif
2101 "mtdparts default\n"
2102 " - reset partition table to defaults\n"
2103 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2104 "mtdparts spread\n"
2105 " - adjust the sizes of the partitions so they are\n"
2106 " at least as big as the mtdparts variable specifies\n"
2107 " and they each start on a good block\n\n"
2108 #else
2109 "\n"
2110 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2111 "-----\n\n"
2112 "this command uses three environment variables:\n\n"
2113 "'partition' - keeps current partition identifier\n\n"
2114 "partition := <part-id>\n"
2115 "<part-id> := <dev-id>,part_num\n\n"
2116 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2117 "mtdids=<idmap>[,<idmap>,...]\n\n"
2118 "<idmap> := <dev-id>=<mtd-id>\n"
2119 "<dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>\n"
2120 "<dev-num> := mtd device number, 0...\n"
2121 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2122 "'mtdparts' - partition list\n\n"
2123 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2124 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2125 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2126 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2127 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2128 "<offset> := partition start offset within the device\n"
2129 "<name> := '(' NAME ')'\n"
2130 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2131 #endif
2132
2133 U_BOOT_CMD(
2134 mtdparts, 6, 0, do_mtdparts,
2135 "define flash/nand partitions", mtdparts_help_text
2136 );
2137 /***************************************************/
2138