1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2002
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
6 * (C) Copyright 2002
7 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
8 *
9 * (C) Copyright 2003
10 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de>
11 *
12 * (C) Copyright 2005
13 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
14 *
15 * Added support for reading flash partition table from environment.
16 * Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4
17 * kernel tree.
18 *
19 * (C) Copyright 2008
20 * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org>
21 *
22 * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $
23 * Copyright 2002 SYSGO Real-Time Solutions GmbH
24 */
25
26 /*
27 * Three environment variables are used by the parsing routines:
28 *
29 * 'partition' - keeps current partition identifier
30 *
31 * partition := <part-id>
32 * <part-id> := <dev-id>,part_num
33 *
34 *
35 * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
36 *
37 * mtdids=<idmap>[,<idmap>,...]
38 *
39 * <idmap> := <dev-id>=<mtd-id>
40 * <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>
41 * <dev-num> := mtd device number, 0...
42 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
43 *
44 *
45 * 'mtdparts' - partition list
46 *
47 * mtdparts=[mtdparts=]<mtd-def>[;<mtd-def>...]
48 *
49 * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
50 * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
51 * <part-def> := <size>[@<offset>][<name>][<ro-flag>]
52 * <size> := standard linux memsize OR '-' to denote all remaining space
53 * <offset> := partition start offset within the device
54 * <name> := '(' NAME ')'
55 * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
56 *
57 * Notes:
58 * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
59 * - if the above variables are not set defaults for a given target are used
60 *
61 * Examples:
62 *
63 * 1 NOR Flash, with 1 single writable partition:
64 * mtdids=nor0=edb7312-nor
65 * mtdparts=[mtdparts=]edb7312-nor:-
66 *
67 * 1 NOR Flash with 2 partitions, 1 NAND with one
68 * mtdids=nor0=edb7312-nor,nand0=edb7312-nand
69 * mtdparts=[mtdparts=]edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
70 *
71 */
72
73 #include <common.h>
74 #include <command.h>
75 #include <env.h>
76 #include <log.h>
77 #include <malloc.h>
78 #include <asm/global_data.h>
79 #include <jffs2/load_kernel.h>
80 #include <linux/list.h>
81 #include <linux/ctype.h>
82 #include <linux/err.h>
83 #include <linux/mtd/mtd.h>
84
85 #if defined(CONFIG_CMD_NAND)
86 #include <linux/mtd/rawnand.h>
87 #include <nand.h>
88 #endif
89
90 #if defined(CONFIG_CMD_ONENAND)
91 #include <linux/mtd/onenand.h>
92 #include <onenand_uboot.h>
93 #endif
94
95 DECLARE_GLOBAL_DATA_PTR;
96
97 /* special size referring to all the remaining space in a partition */
98 #define SIZE_REMAINING (~0llu)
99
100 /* special offset value, it is used when not provided by user
101 *
102 * this value is used temporarily during parsing, later such offests
103 * are recalculated */
104 #define OFFSET_NOT_SPECIFIED (~0llu)
105
106 /* minimum partition size */
107 #define MIN_PART_SIZE 4096
108
109 /* this flag needs to be set in part_info struct mask_flags
110 * field for read-only partitions */
111 #define MTD_WRITEABLE_CMD 1
112
113 /* default values for mtdids and mtdparts variables */
114 #if !defined(MTDIDS_DEFAULT)
115 #ifdef CONFIG_MTDIDS_DEFAULT
116 #define MTDIDS_DEFAULT CONFIG_MTDIDS_DEFAULT
117 #else
118 #define MTDIDS_DEFAULT NULL
119 #endif
120 #endif
121 #if !defined(MTDPARTS_DEFAULT)
122 #ifdef CONFIG_MTDPARTS_DEFAULT
123 #define MTDPARTS_DEFAULT CONFIG_MTDPARTS_DEFAULT
124 #else
125 #define MTDPARTS_DEFAULT NULL
126 #endif
127 #endif
128 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
129 extern void board_mtdparts_default(const char **mtdids, const char **mtdparts);
130 #endif
131 static const char *mtdids_default = MTDIDS_DEFAULT;
132 static const char *mtdparts_default = MTDPARTS_DEFAULT;
133
134 /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */
135 #define MTDIDS_MAXLEN 128
136 #define MTDPARTS_MAXLEN 512
137 #define PARTITION_MAXLEN 16
138 static char last_ids[MTDIDS_MAXLEN + 1];
139 static char last_parts[MTDPARTS_MAXLEN + 1];
140 static char last_partition[PARTITION_MAXLEN + 1];
141
142 /* low level jffs2 cache cleaning routine */
143 extern void jffs2_free_cache(struct part_info *part);
144
145 /* mtdids mapping list, filled by parse_ids() */
146 static struct list_head mtdids;
147
148 /* device/partition list, parse_cmdline() parses into here */
149 static struct list_head devices;
150
151 /* current active device and partition number */
152 struct mtd_device *current_mtd_dev = NULL;
153 u8 current_mtd_partnum = 0;
154
155 u8 use_defaults;
156
157 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num);
158
159 /* command line only routines */
160 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len);
161 static int device_del(struct mtd_device *dev);
162
163 /**
164 * Parses a string into a number. The number stored at ptr is
165 * potentially suffixed with K (for kilobytes, or 1024 bytes),
166 * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or
167 * 1073741824). If the number is suffixed with K, M, or G, then
168 * the return value is the number multiplied by one kilobyte, one
169 * megabyte, or one gigabyte, respectively.
170 *
171 * @param ptr where parse begins
172 * @param retptr output pointer to next char after parse completes (output)
173 * @return resulting unsigned int
174 */
memsize_parse(const char * const ptr,const char ** retptr)175 static u64 memsize_parse (const char *const ptr, const char **retptr)
176 {
177 u64 ret = simple_strtoull(ptr, (char **)retptr, 0);
178
179 switch (**retptr) {
180 case 'G':
181 case 'g':
182 ret <<= 10;
183 /* Fallthrough */
184 case 'M':
185 case 'm':
186 ret <<= 10;
187 /* Fallthrough */
188 case 'K':
189 case 'k':
190 ret <<= 10;
191 (*retptr)++;
192 /* Fallthrough */
193 default:
194 break;
195 }
196
197 return ret;
198 }
199
200 /**
201 * Format string describing supplied size. This routine does the opposite job
202 * to memsize_parse(). Size in bytes is converted to string and if possible
203 * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
204 *
205 * Note, that this routine does not check for buffer overflow, it's the caller
206 * who must assure enough space.
207 *
208 * @param buf output buffer
209 * @param size size to be converted to string
210 */
memsize_format(char * buf,u64 size)211 static void memsize_format(char *buf, u64 size)
212 {
213 #define SIZE_GB ((u32)1024*1024*1024)
214 #define SIZE_MB ((u32)1024*1024)
215 #define SIZE_KB ((u32)1024)
216
217 if ((size % SIZE_GB) == 0)
218 sprintf(buf, "%llug", size/SIZE_GB);
219 else if ((size % SIZE_MB) == 0)
220 sprintf(buf, "%llum", size/SIZE_MB);
221 else if (size % SIZE_KB == 0)
222 sprintf(buf, "%lluk", size/SIZE_KB);
223 else
224 sprintf(buf, "%llu", size);
225 }
226
227 /**
228 * This routine does global indexing of all partitions. Resulting index for
229 * current partition is saved in 'mtddevnum'. Current partition name in
230 * 'mtddevname'.
231 */
index_partitions(void)232 static void index_partitions(void)
233 {
234 u16 mtddevnum;
235 struct part_info *part;
236 struct list_head *dentry;
237 struct mtd_device *dev;
238
239 debug("--- index partitions ---\n");
240
241 if (current_mtd_dev) {
242 mtddevnum = 0;
243 list_for_each(dentry, &devices) {
244 dev = list_entry(dentry, struct mtd_device, link);
245 if (dev == current_mtd_dev) {
246 mtddevnum += current_mtd_partnum;
247 env_set_ulong("mtddevnum", mtddevnum);
248 debug("=> mtddevnum %d,\n", mtddevnum);
249 break;
250 }
251 mtddevnum += dev->num_parts;
252 }
253
254 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
255 if (part) {
256 env_set("mtddevname", part->name);
257
258 debug("=> mtddevname %s\n", part->name);
259 } else {
260 env_set("mtddevname", NULL);
261
262 debug("=> mtddevname NULL\n");
263 }
264 } else {
265 env_set("mtddevnum", NULL);
266 env_set("mtddevname", NULL);
267
268 debug("=> mtddevnum NULL\n=> mtddevname NULL\n");
269 }
270 }
271
272 /**
273 * Save current device and partition in environment variable 'partition'.
274 */
current_save(void)275 static void current_save(void)
276 {
277 char buf[16];
278
279 debug("--- current_save ---\n");
280
281 if (current_mtd_dev) {
282 sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type),
283 current_mtd_dev->id->num, current_mtd_partnum);
284
285 env_set("partition", buf);
286 strncpy(last_partition, buf, 16);
287
288 debug("=> partition %s\n", buf);
289 } else {
290 env_set("partition", NULL);
291 last_partition[0] = '\0';
292
293 debug("=> partition NULL\n");
294 }
295 index_partitions();
296 }
297
298
299 /**
300 * Produce a mtd_info given a type and num.
301 *
302 * @param type mtd type
303 * @param num mtd number
304 * @param mtd a pointer to an mtd_info instance (output)
305 * @return 0 if device is valid, 1 otherwise
306 */
get_mtd_info(u8 type,u8 num,struct mtd_info ** mtd)307 static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd)
308 {
309 char mtd_dev[16];
310
311 sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num);
312 *mtd = get_mtd_device_nm(mtd_dev);
313 if (IS_ERR(*mtd)) {
314 printf("Device %s not found!\n", mtd_dev);
315 return 1;
316 }
317 put_mtd_device(*mtd);
318
319 return 0;
320 }
321
322 /**
323 * Performs sanity check for supplied flash partition.
324 * Table of existing MTD flash devices is searched and partition device
325 * is located. Alignment with the granularity of nand erasesize is verified.
326 *
327 * @param id of the parent device
328 * @param part partition to validate
329 * @return 0 if partition is valid, 1 otherwise
330 */
part_validate_eraseblock(struct mtdids * id,struct part_info * part)331 static int part_validate_eraseblock(struct mtdids *id, struct part_info *part)
332 {
333 struct mtd_info *mtd = NULL;
334 int i, j;
335 ulong start;
336 u64 offset, size;
337
338 if (get_mtd_info(id->type, id->num, &mtd))
339 return 1;
340
341 part->sector_size = mtd->erasesize;
342
343 if (!mtd->numeraseregions) {
344 /*
345 * Only one eraseregion (NAND, SPI-NAND, OneNAND or uniform NOR),
346 * checking for alignment is easy here
347 */
348 offset = part->offset;
349 if (do_div(offset, mtd->erasesize)) {
350 printf("%s%d: partition (%s) start offset"
351 "alignment incorrect\n",
352 MTD_DEV_TYPE(id->type), id->num, part->name);
353 return 1;
354 }
355
356 size = part->size;
357 if (do_div(size, mtd->erasesize)) {
358 printf("%s%d: partition (%s) size alignment incorrect\n",
359 MTD_DEV_TYPE(id->type), id->num, part->name);
360 return 1;
361 }
362 } else {
363 /*
364 * Multiple eraseregions (non-uniform NOR),
365 * checking for alignment is more complex here
366 */
367
368 /* Check start alignment */
369 for (i = 0; i < mtd->numeraseregions; i++) {
370 start = mtd->eraseregions[i].offset;
371 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
372 if (part->offset == start)
373 goto start_ok;
374 start += mtd->eraseregions[i].erasesize;
375 }
376 }
377
378 printf("%s%d: partition (%s) start offset alignment incorrect\n",
379 MTD_DEV_TYPE(id->type), id->num, part->name);
380 return 1;
381
382 start_ok:
383
384 /* Check end/size alignment */
385 for (i = 0; i < mtd->numeraseregions; i++) {
386 start = mtd->eraseregions[i].offset;
387 for (j = 0; j < mtd->eraseregions[i].numblocks; j++) {
388 if ((part->offset + part->size) == start)
389 goto end_ok;
390 start += mtd->eraseregions[i].erasesize;
391 }
392 }
393 /* Check last sector alignment */
394 if ((part->offset + part->size) == start)
395 goto end_ok;
396
397 printf("%s%d: partition (%s) size alignment incorrect\n",
398 MTD_DEV_TYPE(id->type), id->num, part->name);
399 return 1;
400
401 end_ok:
402 return 0;
403 }
404
405 return 0;
406 }
407
408
409 /**
410 * Performs sanity check for supplied partition. Offset and size are
411 * verified to be within valid range. Partition type is checked and
412 * part_validate_eraseblock() is called with the argument of part.
413 *
414 * @param id of the parent device
415 * @param part partition to validate
416 * @return 0 if partition is valid, 1 otherwise
417 */
part_validate(struct mtdids * id,struct part_info * part)418 static int part_validate(struct mtdids *id, struct part_info *part)
419 {
420 if (part->size == SIZE_REMAINING)
421 part->size = id->size - part->offset;
422
423 if (part->offset > id->size) {
424 printf("%s: offset %08llx beyond flash size %08llx\n",
425 id->mtd_id, part->offset, id->size);
426 return 1;
427 }
428
429 if ((part->offset + part->size) <= part->offset) {
430 printf("%s%d: partition (%s) size too big\n",
431 MTD_DEV_TYPE(id->type), id->num, part->name);
432 return 1;
433 }
434
435 if (part->offset + part->size > id->size) {
436 printf("%s: partitioning exceeds flash size\n", id->mtd_id);
437 return 1;
438 }
439
440 /*
441 * Now we need to check if the partition starts and ends on
442 * sector (eraseblock) regions
443 */
444 return part_validate_eraseblock(id, part);
445 }
446
447 /**
448 * Delete selected partition from the partition list of the specified device.
449 *
450 * @param dev device to delete partition from
451 * @param part partition to delete
452 * @return 0 on success, 1 otherwise
453 */
part_del(struct mtd_device * dev,struct part_info * part)454 static int part_del(struct mtd_device *dev, struct part_info *part)
455 {
456 u8 current_save_needed = 0;
457
458 /* if there is only one partition, remove whole device */
459 if (dev->num_parts == 1)
460 return device_del(dev);
461
462 /* otherwise just delete this partition */
463
464 if (dev == current_mtd_dev) {
465 /* we are modyfing partitions for the current device,
466 * update current */
467 struct part_info *curr_pi;
468 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
469
470 if (curr_pi) {
471 if (curr_pi == part) {
472 printf("current partition deleted, resetting current to 0\n");
473 current_mtd_partnum = 0;
474 } else if (part->offset <= curr_pi->offset) {
475 current_mtd_partnum--;
476 }
477 current_save_needed = 1;
478 }
479 }
480
481 list_del(&part->link);
482 free(part);
483 dev->num_parts--;
484
485 if (current_save_needed > 0)
486 current_save();
487 else
488 index_partitions();
489
490 return 0;
491 }
492
493 /**
494 * Delete all partitions from parts head list, free memory.
495 *
496 * @param head list of partitions to delete
497 */
part_delall(struct list_head * head)498 static void part_delall(struct list_head *head)
499 {
500 struct list_head *entry, *n;
501 struct part_info *part_tmp;
502
503 /* clean tmp_list and free allocated memory */
504 list_for_each_safe(entry, n, head) {
505 part_tmp = list_entry(entry, struct part_info, link);
506
507 list_del(entry);
508 free(part_tmp);
509 }
510 }
511
512 /**
513 * Add new partition to the supplied partition list. Make sure partitions are
514 * sorted by offset in ascending order.
515 *
516 * @param head list this partition is to be added to
517 * @param new partition to be added
518 */
part_sort_add(struct mtd_device * dev,struct part_info * part)519 static int part_sort_add(struct mtd_device *dev, struct part_info *part)
520 {
521 struct list_head *entry;
522 struct part_info *new_pi, *curr_pi;
523
524 /* link partition to parrent dev */
525 part->dev = dev;
526
527 if (list_empty(&dev->parts)) {
528 debug("part_sort_add: list empty\n");
529 list_add(&part->link, &dev->parts);
530 dev->num_parts++;
531 index_partitions();
532 return 0;
533 }
534
535 new_pi = list_entry(&part->link, struct part_info, link);
536
537 /* get current partition info if we are updating current device */
538 curr_pi = NULL;
539 if (dev == current_mtd_dev)
540 curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum);
541
542 list_for_each(entry, &dev->parts) {
543 struct part_info *pi;
544
545 pi = list_entry(entry, struct part_info, link);
546
547 /* be compliant with kernel cmdline, allow only one partition at offset zero */
548 if ((new_pi->offset == pi->offset) && (pi->offset == 0)) {
549 printf("cannot add second partition at offset 0\n");
550 return 1;
551 }
552
553 if (new_pi->offset <= pi->offset) {
554 list_add_tail(&part->link, entry);
555 dev->num_parts++;
556
557 if (curr_pi && (pi->offset <= curr_pi->offset)) {
558 /* we are modyfing partitions for the current
559 * device, update current */
560 current_mtd_partnum++;
561 current_save();
562 } else {
563 index_partitions();
564 }
565 return 0;
566 }
567 }
568
569 list_add_tail(&part->link, &dev->parts);
570 dev->num_parts++;
571 index_partitions();
572 return 0;
573 }
574
575 /**
576 * Add provided partition to the partition list of a given device.
577 *
578 * @param dev device to which partition is added
579 * @param part partition to be added
580 * @return 0 on success, 1 otherwise
581 */
part_add(struct mtd_device * dev,struct part_info * part)582 static int part_add(struct mtd_device *dev, struct part_info *part)
583 {
584 /* verify alignment and size */
585 if (part_validate(dev->id, part) != 0)
586 return 1;
587
588 /* partition is ok, add it to the list */
589 if (part_sort_add(dev, part) != 0)
590 return 1;
591
592 return 0;
593 }
594
595 /**
596 * Parse one partition definition, allocate memory and return pointer to this
597 * location in retpart.
598 *
599 * @param partdef pointer to the partition definition string i.e. <part-def>
600 * @param ret output pointer to next char after parse completes (output)
601 * @param retpart pointer to the allocated partition (output)
602 * @return 0 on success, 1 otherwise
603 */
part_parse(const char * const partdef,const char ** ret,struct part_info ** retpart)604 static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart)
605 {
606 struct part_info *part;
607 u64 size;
608 u64 offset;
609 const char *name;
610 int name_len;
611 unsigned int mask_flags;
612 const char *p;
613
614 p = partdef;
615 *retpart = NULL;
616 *ret = NULL;
617
618 /* fetch the partition size */
619 if (*p == '-') {
620 /* assign all remaining space to this partition */
621 debug("'-': remaining size assigned\n");
622 size = SIZE_REMAINING;
623 p++;
624 } else {
625 size = memsize_parse(p, &p);
626 if (size < MIN_PART_SIZE) {
627 printf("partition size too small (%llx)\n", size);
628 return 1;
629 }
630 }
631
632 /* check for offset */
633 offset = OFFSET_NOT_SPECIFIED;
634 if (*p == '@') {
635 p++;
636 offset = memsize_parse(p, &p);
637 }
638
639 /* now look for the name */
640 if (*p == '(') {
641 name = ++p;
642 if ((p = strchr(name, ')')) == NULL) {
643 printf("no closing ) found in partition name\n");
644 return 1;
645 }
646 name_len = p - name + 1;
647 if ((name_len - 1) == 0) {
648 printf("empty partition name\n");
649 return 1;
650 }
651 p++;
652 } else {
653 /* 0x00000000@0x00000000 */
654 name_len = 22;
655 name = NULL;
656 }
657
658 /* test for options */
659 mask_flags = 0;
660 if (strncmp(p, "ro", 2) == 0) {
661 mask_flags |= MTD_WRITEABLE_CMD;
662 p += 2;
663 }
664
665 /* check for next partition definition */
666 if (*p == ',') {
667 if (size == SIZE_REMAINING) {
668 *ret = NULL;
669 printf("no partitions allowed after a fill-up partition\n");
670 return 1;
671 }
672 *ret = ++p;
673 } else if ((*p == ';') || (*p == '\0')) {
674 *ret = p;
675 } else {
676 printf("unexpected character '%c' at the end of partition\n", *p);
677 *ret = NULL;
678 return 1;
679 }
680
681 /* allocate memory */
682 part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
683 if (!part) {
684 printf("out of memory\n");
685 return 1;
686 }
687 memset(part, 0, sizeof(struct part_info) + name_len);
688 part->size = size;
689 part->offset = offset;
690 part->mask_flags = mask_flags;
691 part->name = (char *)(part + 1);
692
693 if (name) {
694 /* copy user provided name */
695 strncpy(part->name, name, name_len - 1);
696 part->auto_name = 0;
697 } else {
698 /* auto generated name in form of size@offset */
699 snprintf(part->name, name_len, "0x%08llx@0x%08llx", size, offset);
700 part->auto_name = 1;
701 }
702
703 part->name[name_len - 1] = '\0';
704 INIT_LIST_HEAD(&part->link);
705
706 debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx mask flags %d\n",
707 part->name, part->size,
708 part->offset, part->mask_flags);
709
710 *retpart = part;
711 return 0;
712 }
713
714 /**
715 * Check device number to be within valid range for given device type.
716 *
717 * @param type mtd type
718 * @param num mtd number
719 * @param size a pointer to the size of the mtd device (output)
720 * @return 0 if device is valid, 1 otherwise
721 */
mtd_device_validate(u8 type,u8 num,u64 * size)722 static int mtd_device_validate(u8 type, u8 num, u64 *size)
723 {
724 struct mtd_info *mtd = NULL;
725
726 if (get_mtd_info(type, num, &mtd))
727 return 1;
728
729 *size = mtd->size;
730
731 return 0;
732 }
733
734 /**
735 * Delete all mtd devices from a supplied devices list, free memory allocated for
736 * each device and delete all device partitions.
737 *
738 * @return 0 on success, 1 otherwise
739 */
device_delall(struct list_head * head)740 static int device_delall(struct list_head *head)
741 {
742 struct list_head *entry, *n;
743 struct mtd_device *dev_tmp;
744
745 /* clean devices list */
746 list_for_each_safe(entry, n, head) {
747 dev_tmp = list_entry(entry, struct mtd_device, link);
748 list_del(entry);
749 part_delall(&dev_tmp->parts);
750 free(dev_tmp);
751 }
752 INIT_LIST_HEAD(&devices);
753
754 return 0;
755 }
756
757 /**
758 * If provided device exists it's partitions are deleted, device is removed
759 * from device list and device memory is freed.
760 *
761 * @param dev device to be deleted
762 * @return 0 on success, 1 otherwise
763 */
device_del(struct mtd_device * dev)764 static int device_del(struct mtd_device *dev)
765 {
766 part_delall(&dev->parts);
767 list_del(&dev->link);
768 free(dev);
769
770 if (dev == current_mtd_dev) {
771 /* we just deleted current device */
772 if (list_empty(&devices)) {
773 current_mtd_dev = NULL;
774 } else {
775 /* reset first partition from first dev from the
776 * devices list as current */
777 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
778 current_mtd_partnum = 0;
779 }
780 current_save();
781 return 0;
782 }
783
784 index_partitions();
785 return 0;
786 }
787
788 /**
789 * Search global device list and return pointer to the device of type and num
790 * specified.
791 *
792 * @param type device type
793 * @param num device number
794 * @return NULL if requested device does not exist
795 */
device_find(u8 type,u8 num)796 struct mtd_device *device_find(u8 type, u8 num)
797 {
798 struct list_head *entry;
799 struct mtd_device *dev_tmp;
800
801 list_for_each(entry, &devices) {
802 dev_tmp = list_entry(entry, struct mtd_device, link);
803
804 if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num))
805 return dev_tmp;
806 }
807
808 return NULL;
809 }
810
811 /**
812 * Add specified device to the global device list.
813 *
814 * @param dev device to be added
815 */
device_add(struct mtd_device * dev)816 static void device_add(struct mtd_device *dev)
817 {
818 u8 current_save_needed = 0;
819
820 if (list_empty(&devices)) {
821 current_mtd_dev = dev;
822 current_mtd_partnum = 0;
823 current_save_needed = 1;
824 }
825
826 list_add_tail(&dev->link, &devices);
827
828 if (current_save_needed > 0)
829 current_save();
830 else
831 index_partitions();
832 }
833
834 /**
835 * Parse device type, name and mtd-id. If syntax is ok allocate memory and
836 * return pointer to the device structure.
837 *
838 * @param mtd_dev pointer to the device definition string i.e. <mtd-dev>
839 * @param ret output pointer to next char after parse completes (output)
840 * @param retdev pointer to the allocated device (output)
841 * @return 0 on success, 1 otherwise
842 */
device_parse(const char * const mtd_dev,const char ** ret,struct mtd_device ** retdev)843 static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev)
844 {
845 struct mtd_device *dev;
846 struct part_info *part;
847 struct mtdids *id;
848 const char *mtd_id;
849 unsigned int mtd_id_len;
850 const char *p;
851 const char *pend;
852 LIST_HEAD(tmp_list);
853 struct list_head *entry, *n;
854 u16 num_parts;
855 u64 offset;
856 int err = 1;
857
858 debug("===device_parse===\n");
859
860 assert(retdev);
861 *retdev = NULL;
862
863 if (ret)
864 *ret = NULL;
865
866 /* fetch <mtd-id> */
867 mtd_id = p = mtd_dev;
868 if (!(p = strchr(mtd_id, ':'))) {
869 printf("no <mtd-id> identifier\n");
870 return 1;
871 }
872 mtd_id_len = p - mtd_id + 1;
873 p++;
874
875 /* verify if we have a valid device specified */
876 if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) {
877 printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id);
878 return 1;
879 }
880
881 pend = strchr(p, ';');
882 debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
883 id->type, MTD_DEV_TYPE(id->type),
884 id->num, id->mtd_id);
885 debug("parsing partitions %.*s\n", (int)(pend ? pend - p : strlen(p)), p);
886
887 /* parse partitions */
888 num_parts = 0;
889
890 offset = 0;
891 if ((dev = device_find(id->type, id->num)) != NULL) {
892 /* if device already exists start at the end of the last partition */
893 part = list_entry(dev->parts.prev, struct part_info, link);
894 offset = part->offset + part->size;
895 }
896
897 while (p && (*p != '\0') && (*p != ';')) {
898 err = 1;
899 if ((part_parse(p, &p, &part) != 0) || (!part))
900 break;
901
902 /* calculate offset when not specified */
903 if (part->offset == OFFSET_NOT_SPECIFIED)
904 part->offset = offset;
905 else
906 offset = part->offset;
907
908 /* verify alignment and size */
909 if (part_validate(id, part) != 0)
910 break;
911
912 offset += part->size;
913
914 /* partition is ok, add it to the list */
915 list_add_tail(&part->link, &tmp_list);
916 num_parts++;
917 err = 0;
918 }
919 if (err == 1) {
920 part_delall(&tmp_list);
921 return 1;
922 }
923
924 debug("\ntotal partitions: %d\n", num_parts);
925
926 /* check for next device presence */
927 if (p) {
928 if (*p == ';') {
929 if (ret)
930 *ret = ++p;
931 } else if (*p == '\0') {
932 if (ret)
933 *ret = p;
934 } else {
935 printf("unexpected character '%c' at the end of device\n", *p);
936 if (ret)
937 *ret = NULL;
938 return 1;
939 }
940 }
941
942 /* allocate memory for mtd_device structure */
943 if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) {
944 printf("out of memory\n");
945 return 1;
946 }
947 memset(dev, 0, sizeof(struct mtd_device));
948 dev->id = id;
949 dev->num_parts = 0; /* part_sort_add increments num_parts */
950 INIT_LIST_HEAD(&dev->parts);
951 INIT_LIST_HEAD(&dev->link);
952
953 /* move partitions from tmp_list to dev->parts */
954 list_for_each_safe(entry, n, &tmp_list) {
955 part = list_entry(entry, struct part_info, link);
956 list_del(entry);
957 if (part_sort_add(dev, part) != 0) {
958 device_del(dev);
959 return 1;
960 }
961 }
962
963 *retdev = dev;
964
965 debug("===\n\n");
966 return 0;
967 }
968
969 /**
970 * Initialize global device list.
971 *
972 * @return 0 on success, 1 otherwise
973 */
mtd_devices_init(void)974 static int mtd_devices_init(void)
975 {
976 last_parts[0] = '\0';
977 current_mtd_dev = NULL;
978 current_save();
979
980 return device_delall(&devices);
981 }
982
983 /*
984 * Search global mtdids list and find id of requested type and number.
985 *
986 * @return pointer to the id if it exists, NULL otherwise
987 */
id_find(u8 type,u8 num)988 static struct mtdids* id_find(u8 type, u8 num)
989 {
990 struct list_head *entry;
991 struct mtdids *id;
992
993 list_for_each(entry, &mtdids) {
994 id = list_entry(entry, struct mtdids, link);
995
996 if ((id->type == type) && (id->num == num))
997 return id;
998 }
999
1000 return NULL;
1001 }
1002
1003 /**
1004 * Search global mtdids list and find id of a requested mtd_id.
1005 *
1006 * Note: first argument is not null terminated.
1007 *
1008 * @param mtd_id string containing requested mtd_id
1009 * @param mtd_id_len length of supplied mtd_id
1010 * @return pointer to the id if it exists, NULL otherwise
1011 */
id_find_by_mtd_id(const char * mtd_id,unsigned int mtd_id_len)1012 static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len)
1013 {
1014 struct list_head *entry;
1015 struct mtdids *id;
1016
1017 debug("--- id_find_by_mtd_id: '%.*s' (len = %d)\n",
1018 mtd_id_len, mtd_id, mtd_id_len);
1019
1020 list_for_each(entry, &mtdids) {
1021 id = list_entry(entry, struct mtdids, link);
1022
1023 debug("entry: '%s' (len = %zu)\n",
1024 id->mtd_id, strlen(id->mtd_id));
1025
1026 if (mtd_id_len != strlen(id->mtd_id))
1027 continue;
1028 if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0)
1029 return id;
1030 }
1031
1032 return NULL;
1033 }
1034
1035 /**
1036 * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>,
1037 * return device type and number.
1038 *
1039 * @param id string describing device id
1040 * @param ret_id output pointer to next char after parse completes (output)
1041 * @param dev_type parsed device type (output)
1042 * @param dev_num parsed device number (output)
1043 * @return 0 on success, 1 otherwise
1044 */
mtd_id_parse(const char * id,const char ** ret_id,u8 * dev_type,u8 * dev_num)1045 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type,
1046 u8 *dev_num)
1047 {
1048 const char *p = id;
1049
1050 *dev_type = 0;
1051 if (strncmp(p, "nand", 4) == 0) {
1052 *dev_type = MTD_DEV_TYPE_NAND;
1053 p += 4;
1054 } else if (strncmp(p, "nor", 3) == 0) {
1055 *dev_type = MTD_DEV_TYPE_NOR;
1056 p += 3;
1057 } else if (strncmp(p, "onenand", 7) == 0) {
1058 *dev_type = MTD_DEV_TYPE_ONENAND;
1059 p += 7;
1060 } else if (strncmp(p, "spi-nand", 8) == 0) {
1061 *dev_type = MTD_DEV_TYPE_SPINAND;
1062 p += 8;
1063 } else {
1064 printf("incorrect device type in %s\n", id);
1065 return 1;
1066 }
1067
1068 if (!isdigit(*p)) {
1069 printf("incorrect device number in %s\n", id);
1070 return 1;
1071 }
1072
1073 *dev_num = simple_strtoul(p, (char **)&p, 0);
1074 if (ret_id)
1075 *ret_id = p;
1076 return 0;
1077 }
1078
1079 /**
1080 * Process all devices and generate corresponding mtdparts string describing
1081 * all partitions on all devices.
1082 *
1083 * @param buf output buffer holding generated mtdparts string (output)
1084 * @param buflen buffer size
1085 * @return 0 on success, 1 otherwise
1086 */
generate_mtdparts(char * buf,u32 buflen)1087 static int generate_mtdparts(char *buf, u32 buflen)
1088 {
1089 struct list_head *pentry, *dentry;
1090 struct mtd_device *dev;
1091 struct part_info *part, *prev_part;
1092 char *p = buf;
1093 char tmpbuf[32];
1094 u64 size, offset;
1095 u32 len, part_cnt;
1096 u32 maxlen = buflen - 1;
1097
1098 debug("--- generate_mtdparts ---\n");
1099
1100 if (list_empty(&devices)) {
1101 buf[0] = '\0';
1102 return 0;
1103 }
1104
1105 list_for_each(dentry, &devices) {
1106 dev = list_entry(dentry, struct mtd_device, link);
1107
1108 /* copy mtd_id */
1109 len = strlen(dev->id->mtd_id) + 1;
1110 if (len > maxlen)
1111 goto cleanup;
1112 memcpy(p, dev->id->mtd_id, len - 1);
1113 p += len - 1;
1114 *(p++) = ':';
1115 maxlen -= len;
1116
1117 /* format partitions */
1118 prev_part = NULL;
1119 part_cnt = 0;
1120 list_for_each(pentry, &dev->parts) {
1121 part = list_entry(pentry, struct part_info, link);
1122 size = part->size;
1123 offset = part->offset;
1124 part_cnt++;
1125
1126 /* partition size */
1127 memsize_format(tmpbuf, size);
1128 len = strlen(tmpbuf);
1129 if (len > maxlen)
1130 goto cleanup;
1131 memcpy(p, tmpbuf, len);
1132 p += len;
1133 maxlen -= len;
1134
1135
1136 /* add offset only when there is a gap between
1137 * partitions */
1138 if ((!prev_part && (offset != 0)) ||
1139 (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) {
1140
1141 memsize_format(tmpbuf, offset);
1142 len = strlen(tmpbuf) + 1;
1143 if (len > maxlen)
1144 goto cleanup;
1145 *(p++) = '@';
1146 memcpy(p, tmpbuf, len - 1);
1147 p += len - 1;
1148 maxlen -= len;
1149 }
1150
1151 /* copy name only if user supplied */
1152 if(!part->auto_name) {
1153 len = strlen(part->name) + 2;
1154 if (len > maxlen)
1155 goto cleanup;
1156
1157 *(p++) = '(';
1158 memcpy(p, part->name, len - 2);
1159 p += len - 2;
1160 *(p++) = ')';
1161 maxlen -= len;
1162 }
1163
1164 /* ro mask flag */
1165 if (part->mask_flags && MTD_WRITEABLE_CMD) {
1166 len = 2;
1167 if (len > maxlen)
1168 goto cleanup;
1169 *(p++) = 'r';
1170 *(p++) = 'o';
1171 maxlen -= 2;
1172 }
1173
1174 /* print ',' separator if there are other partitions
1175 * following */
1176 if (dev->num_parts > part_cnt) {
1177 if (1 > maxlen)
1178 goto cleanup;
1179 *(p++) = ',';
1180 maxlen--;
1181 }
1182 prev_part = part;
1183 }
1184 /* print ';' separator if there are other devices following */
1185 if (dentry->next != &devices) {
1186 if (1 > maxlen)
1187 goto cleanup;
1188 *(p++) = ';';
1189 maxlen--;
1190 }
1191 }
1192
1193 /* we still have at least one char left, as we decremented maxlen at
1194 * the begining */
1195 *p = '\0';
1196
1197 return 0;
1198
1199 cleanup:
1200 last_parts[0] = '\0';
1201 return 1;
1202 }
1203
1204 /**
1205 * Call generate_mtdparts to process all devices and generate corresponding
1206 * mtdparts string, save it in mtdparts environment variable.
1207 *
1208 * @param buf output buffer holding generated mtdparts string (output)
1209 * @param buflen buffer size
1210 * @return 0 on success, 1 otherwise
1211 */
generate_mtdparts_save(char * buf,u32 buflen)1212 static int generate_mtdparts_save(char *buf, u32 buflen)
1213 {
1214 int ret;
1215
1216 ret = generate_mtdparts(buf, buflen);
1217
1218 if ((buf[0] != '\0') && (ret == 0))
1219 env_set("mtdparts", buf);
1220 else
1221 env_set("mtdparts", NULL);
1222
1223 return ret;
1224 }
1225
1226 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1227 /**
1228 * Get the net size (w/o bad blocks) of the given partition.
1229 *
1230 * @param mtd the mtd info
1231 * @param part the partition
1232 * @return the calculated net size of this partition
1233 */
net_part_size(struct mtd_info * mtd,struct part_info * part)1234 static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part)
1235 {
1236 uint64_t i, net_size = 0;
1237
1238 if (!mtd->_block_isbad)
1239 return part->size;
1240
1241 for (i = 0; i < part->size; i += mtd->erasesize) {
1242 if (!mtd->_block_isbad(mtd, part->offset + i))
1243 net_size += mtd->erasesize;
1244 }
1245
1246 return net_size;
1247 }
1248 #endif
1249
print_partition_table(void)1250 static void print_partition_table(void)
1251 {
1252 struct list_head *dentry, *pentry;
1253 struct part_info *part;
1254 struct mtd_device *dev;
1255 int part_num;
1256
1257 list_for_each(dentry, &devices) {
1258 dev = list_entry(dentry, struct mtd_device, link);
1259 /* list partitions for given device */
1260 part_num = 0;
1261 #if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES)
1262 struct mtd_info *mtd;
1263
1264 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1265 return;
1266
1267 printf("\ndevice %s%d <%s>, # parts = %d\n",
1268 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1269 dev->id->mtd_id, dev->num_parts);
1270 printf(" #: name\t\tsize\t\tnet size\toffset\t\tmask_flags\n");
1271
1272 list_for_each(pentry, &dev->parts) {
1273 u32 net_size;
1274 char *size_note;
1275
1276 part = list_entry(pentry, struct part_info, link);
1277 net_size = net_part_size(mtd, part);
1278 size_note = part->size == net_size ? " " : " (!)";
1279 printf("%2d: %-20s0x%08llx\t0x%08x%s\t0x%08llx\t%d\n",
1280 part_num, part->name, part->size,
1281 net_size, size_note, part->offset,
1282 part->mask_flags);
1283 #else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1284 printf("\ndevice %s%d <%s>, # parts = %d\n",
1285 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1286 dev->id->mtd_id, dev->num_parts);
1287 printf(" #: name\t\tsize\t\toffset\t\tmask_flags\n");
1288
1289 list_for_each(pentry, &dev->parts) {
1290 part = list_entry(pentry, struct part_info, link);
1291 printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
1292 part_num, part->name, part->size,
1293 part->offset, part->mask_flags);
1294 #endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */
1295 part_num++;
1296 }
1297 }
1298
1299 if (list_empty(&devices))
1300 printf("no partitions defined\n");
1301 }
1302
1303 /**
1304 * Format and print out a partition list for each device from global device
1305 * list.
1306 */
1307 static void list_partitions(void)
1308 {
1309 struct part_info *part;
1310
1311 debug("\n---list_partitions---\n");
1312 print_partition_table();
1313
1314 /* current_mtd_dev is not NULL only when we have non empty device list */
1315 if (current_mtd_dev) {
1316 part = mtd_part_info(current_mtd_dev, current_mtd_partnum);
1317 if (part) {
1318 printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n",
1319 MTD_DEV_TYPE(current_mtd_dev->id->type),
1320 current_mtd_dev->id->num, current_mtd_partnum,
1321 part->name, part->size, part->offset);
1322 } else {
1323 printf("could not get current partition info\n\n");
1324 }
1325 }
1326
1327 printf("\ndefaults:\n");
1328 printf("mtdids : %s\n",
1329 mtdids_default ? mtdids_default : "none");
1330 /*
1331 * Using printf() here results in printbuffer overflow
1332 * if default mtdparts string is greater than console
1333 * printbuffer. Use puts() to prevent system crashes.
1334 */
1335 puts("mtdparts: ");
1336 puts(mtdparts_default ? mtdparts_default : "none");
1337 puts("\n");
1338 }
1339
1340 /**
1341 * Given partition identifier in form of <dev_type><dev_num>,<part_num> find
1342 * corresponding device and verify partition number.
1343 *
1344 * @param id string describing device and partition or partition name
1345 * @param dev pointer to the requested device (output)
1346 * @param part_num verified partition number (output)
1347 * @param part pointer to requested partition (output)
1348 * @return 0 on success, 1 otherwise
1349 */
1350 int find_dev_and_part(const char *id, struct mtd_device **dev,
1351 u8 *part_num, struct part_info **part)
1352 {
1353 struct list_head *dentry, *pentry;
1354 u8 type, dnum, pnum;
1355 const char *p;
1356
1357 debug("--- find_dev_and_part ---\nid = %s\n", id);
1358
1359 list_for_each(dentry, &devices) {
1360 *part_num = 0;
1361 *dev = list_entry(dentry, struct mtd_device, link);
1362 list_for_each(pentry, &(*dev)->parts) {
1363 *part = list_entry(pentry, struct part_info, link);
1364 if (strcmp((*part)->name, id) == 0)
1365 return 0;
1366 (*part_num)++;
1367 }
1368 }
1369
1370 p = id;
1371 *dev = NULL;
1372 *part = NULL;
1373 *part_num = 0;
1374
1375 if (mtd_id_parse(p, &p, &type, &dnum) != 0)
1376 return 1;
1377
1378 if ((*p++ != ',') || (*p == '\0')) {
1379 printf("no partition number specified\n");
1380 return 1;
1381 }
1382 pnum = simple_strtoul(p, (char **)&p, 0);
1383 if (*p != '\0') {
1384 printf("unexpected trailing character '%c'\n", *p);
1385 return 1;
1386 }
1387
1388 if ((*dev = device_find(type, dnum)) == NULL) {
1389 printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum);
1390 return 1;
1391 }
1392
1393 if ((*part = mtd_part_info(*dev, pnum)) == NULL) {
1394 printf("no such partition\n");
1395 *dev = NULL;
1396 return 1;
1397 }
1398
1399 *part_num = pnum;
1400
1401 return 0;
1402 }
1403
1404 /**
1405 * Find and delete partition. For partition id format see find_dev_and_part().
1406 *
1407 * @param id string describing device and partition
1408 * @return 0 on success, 1 otherwise
1409 */
1410 static int delete_partition(const char *id)
1411 {
1412 u8 pnum;
1413 struct mtd_device *dev;
1414 struct part_info *part;
1415
1416 if (find_dev_and_part(id, &dev, &pnum, &part) == 0) {
1417
1418 debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\n",
1419 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum,
1420 part->name, part->size, part->offset);
1421
1422 if (part_del(dev, part) != 0)
1423 return 1;
1424
1425 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1426 printf("generated mtdparts too long, resetting to null\n");
1427 return 1;
1428 }
1429 return 0;
1430 }
1431
1432 printf("partition %s not found\n", id);
1433 return 1;
1434 }
1435
1436 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1437 /**
1438 * Increase the size of the given partition so that it's net size is at least
1439 * as large as the size member and such that the next partition would start on a
1440 * good block if it were adjacent to this partition.
1441 *
1442 * @param mtd the mtd device
1443 * @param part the partition
1444 * @param next_offset pointer to the offset of the next partition after this
1445 * partition's size has been modified (output)
1446 */
1447 static void spread_partition(struct mtd_info *mtd, struct part_info *part,
1448 uint64_t *next_offset)
1449 {
1450 uint64_t net_size, padding_size = 0;
1451 int truncated;
1452
1453 mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size,
1454 &truncated);
1455
1456 /*
1457 * Absorb bad blocks immediately following this
1458 * partition also into the partition, such that
1459 * the next partition starts with a good block.
1460 */
1461 if (!truncated) {
1462 mtd_get_len_incl_bad(mtd, part->offset + net_size,
1463 mtd->erasesize, &padding_size, &truncated);
1464 if (truncated)
1465 padding_size = 0;
1466 else
1467 padding_size -= mtd->erasesize;
1468 }
1469
1470 if (truncated) {
1471 printf("truncated partition %s to %lld bytes\n", part->name,
1472 (uint64_t) net_size + padding_size);
1473 }
1474
1475 part->size = net_size + padding_size;
1476 *next_offset = part->offset + part->size;
1477 }
1478
1479 /**
1480 * Adjust all of the partition sizes, such that all partitions are at least
1481 * as big as their mtdparts environment variable sizes and they each start
1482 * on a good block.
1483 *
1484 * @return 0 on success, 1 otherwise
1485 */
1486 static int spread_partitions(void)
1487 {
1488 struct list_head *dentry, *pentry;
1489 struct mtd_device *dev;
1490 struct part_info *part;
1491 struct mtd_info *mtd;
1492 int part_num;
1493 uint64_t cur_offs;
1494
1495 list_for_each(dentry, &devices) {
1496 dev = list_entry(dentry, struct mtd_device, link);
1497
1498 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
1499 return 1;
1500
1501 part_num = 0;
1502 cur_offs = 0;
1503 list_for_each(pentry, &dev->parts) {
1504 part = list_entry(pentry, struct part_info, link);
1505
1506 debug("spread_partitions: device = %s%d, partition %d ="
1507 " (%s) 0x%08llx@0x%08llx\n",
1508 MTD_DEV_TYPE(dev->id->type), dev->id->num,
1509 part_num, part->name, part->size,
1510 part->offset);
1511
1512 if (cur_offs > part->offset)
1513 part->offset = cur_offs;
1514
1515 spread_partition(mtd, part, &cur_offs);
1516
1517 part_num++;
1518 }
1519 }
1520
1521 index_partitions();
1522
1523 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
1524 printf("generated mtdparts too long, resetting to null\n");
1525 return 1;
1526 }
1527 return 0;
1528 }
1529 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
1530
1531 /**
1532 * The mtdparts variable tends to be long. If we need to access it
1533 * before the env is relocated, then we need to use our own stack
1534 * buffer. gd->env_buf will be too small.
1535 *
1536 * @param buf temporary buffer pointer MTDPARTS_MAXLEN long
1537 * @return mtdparts variable string, NULL if not found
1538 */
1539 static const char *env_get_mtdparts(char *buf)
1540 {
1541 if (gd->flags & GD_FLG_ENV_READY)
1542 return env_get("mtdparts");
1543 if (env_get_f("mtdparts", buf, MTDPARTS_MAXLEN) != -1)
1544 return buf;
1545 return NULL;
1546 }
1547
1548 /**
1549 * Accept character string describing mtd partitions and call device_parse()
1550 * for each entry. Add created devices to the global devices list.
1551 *
1552 * @param mtdparts string specifing mtd partitions
1553 * @return 0 on success, 1 otherwise
1554 */
1555 static int parse_mtdparts(const char *const mtdparts)
1556 {
1557 const char *p;
1558 struct mtd_device *dev;
1559 int err = 1;
1560 char tmp_parts[MTDPARTS_MAXLEN];
1561
1562 debug("\n---parse_mtdparts---\nmtdparts = %s\n\n", mtdparts);
1563
1564 /* delete all devices and partitions */
1565 if (mtd_devices_init() != 0) {
1566 printf("could not initialise device list\n");
1567 return err;
1568 }
1569
1570 /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */
1571 p = env_get_mtdparts(tmp_parts);
1572 if (!p)
1573 p = mtdparts;
1574
1575 /* Skip the useless prefix, if any */
1576 if (strncmp(p, "mtdparts=", 9) == 0)
1577 p += 9;
1578
1579 while (*p != '\0') {
1580 err = 1;
1581 if ((device_parse(p, &p, &dev) != 0) || (!dev))
1582 break;
1583
1584 debug("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
1585 dev->id->num, dev->id->mtd_id);
1586
1587 /* check if parsed device is already on the list */
1588 if (device_find(dev->id->type, dev->id->num) != NULL) {
1589 printf("device %s%d redefined, please correct mtdparts variable\n",
1590 MTD_DEV_TYPE(dev->id->type), dev->id->num);
1591 break;
1592 }
1593
1594 list_add_tail(&dev->link, &devices);
1595 err = 0;
1596 }
1597 if (err == 1) {
1598 free(dev);
1599 device_delall(&devices);
1600 }
1601
1602 return err;
1603 }
1604
1605 /**
1606 * Parse provided string describing mtdids mapping (see file header for mtdids
1607 * variable format). Allocate memory for each entry and add all found entries
1608 * to the global mtdids list.
1609 *
1610 * @param ids mapping string
1611 * @return 0 on success, 1 otherwise
1612 */
1613 static int parse_mtdids(const char *const ids)
1614 {
1615 const char *p = ids;
1616 const char *mtd_id;
1617 int mtd_id_len;
1618 struct mtdids *id;
1619 struct list_head *entry, *n;
1620 struct mtdids *id_tmp;
1621 u8 type, num;
1622 u64 size;
1623 int ret = 1;
1624
1625 debug("\n---parse_mtdids---\nmtdids = %s\n\n", ids);
1626
1627 /* clean global mtdids list */
1628 list_for_each_safe(entry, n, &mtdids) {
1629 id_tmp = list_entry(entry, struct mtdids, link);
1630 debug("mtdids del: %d %d\n", id_tmp->type, id_tmp->num);
1631 list_del(entry);
1632 free(id_tmp);
1633 }
1634 last_ids[0] = '\0';
1635 INIT_LIST_HEAD(&mtdids);
1636
1637 while(p && (*p != '\0')) {
1638
1639 ret = 1;
1640 /* parse 'nor'|'nand'|'onenand'|'spi-nand'<dev-num> */
1641 if (mtd_id_parse(p, &p, &type, &num) != 0)
1642 break;
1643
1644 if (*p != '=') {
1645 printf("mtdids: incorrect <dev-num>\n");
1646 break;
1647 }
1648 p++;
1649
1650 /* check if requested device exists */
1651 if (mtd_device_validate(type, num, &size) != 0)
1652 return 1;
1653
1654 /* locate <mtd-id> */
1655 mtd_id = p;
1656 if ((p = strchr(mtd_id, ',')) != NULL) {
1657 mtd_id_len = p - mtd_id + 1;
1658 p++;
1659 } else {
1660 mtd_id_len = strlen(mtd_id) + 1;
1661 }
1662 if (mtd_id_len == 0) {
1663 printf("mtdids: no <mtd-id> identifier\n");
1664 break;
1665 }
1666
1667 /* check if this id is already on the list */
1668 int double_entry = 0;
1669 list_for_each(entry, &mtdids) {
1670 id_tmp = list_entry(entry, struct mtdids, link);
1671 if ((id_tmp->type == type) && (id_tmp->num == num)) {
1672 double_entry = 1;
1673 break;
1674 }
1675 }
1676 if (double_entry) {
1677 printf("device id %s%d redefined, please correct mtdids variable\n",
1678 MTD_DEV_TYPE(type), num);
1679 break;
1680 }
1681
1682 /* allocate mtdids structure */
1683 if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) {
1684 printf("out of memory\n");
1685 break;
1686 }
1687 memset(id, 0, sizeof(struct mtdids) + mtd_id_len);
1688 id->num = num;
1689 id->type = type;
1690 id->size = size;
1691 id->mtd_id = (char *)(id + 1);
1692 strncpy(id->mtd_id, mtd_id, mtd_id_len - 1);
1693 id->mtd_id[mtd_id_len - 1] = '\0';
1694 INIT_LIST_HEAD(&id->link);
1695
1696 debug("+ id %s%d\t%16lld bytes\t%s\n",
1697 MTD_DEV_TYPE(id->type), id->num,
1698 id->size, id->mtd_id);
1699
1700 list_add_tail(&id->link, &mtdids);
1701 ret = 0;
1702 }
1703 if (ret == 1) {
1704 /* clean mtdids list and free allocated memory */
1705 list_for_each_safe(entry, n, &mtdids) {
1706 id_tmp = list_entry(entry, struct mtdids, link);
1707 list_del(entry);
1708 free(id_tmp);
1709 }
1710 return 1;
1711 }
1712
1713 return 0;
1714 }
1715
1716
1717 /**
1718 * Parse and initialize global mtdids mapping and create global
1719 * device/partition list.
1720 *
1721 * @return 0 on success, 1 otherwise
1722 */
1723 int mtdparts_init(void)
1724 {
1725 static int initialized = 0;
1726 const char *ids, *parts;
1727 const char *current_partition;
1728 int ids_changed;
1729 char tmp_ep[PARTITION_MAXLEN + 1];
1730 char tmp_parts[MTDPARTS_MAXLEN];
1731
1732 debug("\n---mtdparts_init---\n");
1733 if (!initialized) {
1734 INIT_LIST_HEAD(&mtdids);
1735 INIT_LIST_HEAD(&devices);
1736 memset(last_ids, 0, sizeof(last_ids));
1737 memset(last_parts, 0, sizeof(last_parts));
1738 memset(last_partition, 0, sizeof(last_partition));
1739 #if defined(CONFIG_SYS_MTDPARTS_RUNTIME)
1740 board_mtdparts_default(&mtdids_default, &mtdparts_default);
1741 #endif
1742 use_defaults = 1;
1743 initialized = 1;
1744 }
1745
1746 /* get variables */
1747 ids = env_get("mtdids");
1748 parts = env_get_mtdparts(tmp_parts);
1749 current_partition = env_get("partition");
1750
1751 /* save it for later parsing, cannot rely on current partition pointer
1752 * as 'partition' variable may be updated during init */
1753 memset(tmp_parts, 0, sizeof(tmp_parts));
1754 memset(tmp_ep, 0, sizeof(tmp_ep));
1755 if (current_partition)
1756 strncpy(tmp_ep, current_partition, PARTITION_MAXLEN);
1757
1758 debug("last_ids : %s\n", last_ids);
1759 debug("env_ids : %s\n", ids);
1760 debug("last_parts: %s\n", last_parts);
1761 debug("env_parts : %s\n\n", parts);
1762
1763 debug("last_partition : %s\n", last_partition);
1764 debug("env_partition : %s\n", current_partition);
1765
1766 /* if mtdids variable is empty try to use defaults */
1767 if (!ids) {
1768 if (mtdids_default) {
1769 debug("mtdids variable not defined, using default\n");
1770 ids = mtdids_default;
1771 env_set("mtdids", (char *)ids);
1772 } else {
1773 printf("mtdids not defined, no default present\n");
1774 return 1;
1775 }
1776 }
1777 if (strlen(ids) > MTDIDS_MAXLEN - 1) {
1778 printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN);
1779 return 1;
1780 }
1781
1782 /* use defaults when mtdparts variable is not defined
1783 * once mtdparts is saved environment, drop use_defaults flag */
1784 if (!parts) {
1785 if (mtdparts_default && use_defaults) {
1786 parts = mtdparts_default;
1787 if (env_set("mtdparts", (char *)parts) == 0)
1788 use_defaults = 0;
1789 } else
1790 printf("mtdparts variable not set, see 'help mtdparts'\n");
1791 }
1792
1793 if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) {
1794 printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN);
1795 return 1;
1796 }
1797
1798 /* check if we have already parsed those mtdids */
1799 if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) {
1800 ids_changed = 0;
1801 } else {
1802 ids_changed = 1;
1803
1804 if (parse_mtdids(ids) != 0) {
1805 mtd_devices_init();
1806 return 1;
1807 }
1808
1809 /* ok it's good, save new ids */
1810 strncpy(last_ids, ids, MTDIDS_MAXLEN);
1811 }
1812
1813 /* parse partitions if either mtdparts or mtdids were updated */
1814 if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) {
1815 if (parse_mtdparts(parts) != 0)
1816 return 1;
1817
1818 if (list_empty(&devices)) {
1819 printf("mtdparts_init: no valid partitions\n");
1820 return 1;
1821 }
1822
1823 /* ok it's good, save new parts */
1824 strncpy(last_parts, parts, MTDPARTS_MAXLEN);
1825
1826 /* reset first partition from first dev from the list as current */
1827 current_mtd_dev = list_entry(devices.next, struct mtd_device, link);
1828 current_mtd_partnum = 0;
1829 current_save();
1830
1831 debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n",
1832 MTD_DEV_TYPE(current_mtd_dev->id->type),
1833 current_mtd_dev->id->num, current_mtd_partnum);
1834 }
1835
1836 /* mtdparts variable was reset to NULL, delete all devices/partitions */
1837 if (!parts && (last_parts[0] != '\0'))
1838 return mtd_devices_init();
1839
1840 /* do not process current partition if mtdparts variable is null */
1841 if (!parts)
1842 return 0;
1843
1844 /* is current partition set in environment? if so, use it */
1845 if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) {
1846 struct part_info *p;
1847 struct mtd_device *cdev;
1848 u8 pnum;
1849
1850 debug("--- getting current partition: %s\n", tmp_ep);
1851
1852 if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) {
1853 current_mtd_dev = cdev;
1854 current_mtd_partnum = pnum;
1855 current_save();
1856 }
1857 } else if (env_get("partition") == NULL) {
1858 debug("no partition variable set, setting...\n");
1859 current_save();
1860 }
1861
1862 return 0;
1863 }
1864
1865 /**
1866 * Return pointer to the partition of a requested number from a requested
1867 * device.
1868 *
1869 * @param dev device that is to be searched for a partition
1870 * @param part_num requested partition number
1871 * @return pointer to the part_info, NULL otherwise
1872 */
1873 static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num)
1874 {
1875 struct list_head *entry;
1876 struct part_info *part;
1877 int num;
1878
1879 if (!dev)
1880 return NULL;
1881
1882 debug("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n",
1883 part_num, MTD_DEV_TYPE(dev->id->type),
1884 dev->id->num, dev->id->mtd_id);
1885
1886 if (part_num >= dev->num_parts) {
1887 printf("invalid partition number %d for device %s%d (%s)\n",
1888 part_num, MTD_DEV_TYPE(dev->id->type),
1889 dev->id->num, dev->id->mtd_id);
1890 return NULL;
1891 }
1892
1893 /* locate partition number, return it */
1894 num = 0;
1895 list_for_each(entry, &dev->parts) {
1896 part = list_entry(entry, struct part_info, link);
1897
1898 if (part_num == num++) {
1899 return part;
1900 }
1901 }
1902
1903 return NULL;
1904 }
1905
1906 /***************************************************/
1907 /* U-Boot commands */
1908 /***************************************************/
1909 /* command line only */
1910 /**
1911 * Routine implementing u-boot chpart command. Sets new current partition based
1912 * on the user supplied partition id. For partition id format see find_dev_and_part().
1913 *
1914 * @param cmdtp command internal data
1915 * @param flag command flag
1916 * @param argc number of arguments supplied to the command
1917 * @param argv arguments list
1918 * @return 0 on success, 1 otherwise
1919 */
1920 static int do_chpart(struct cmd_tbl *cmdtp, int flag, int argc,
1921 char *const argv[])
1922 {
1923 /* command line only */
1924 struct mtd_device *dev;
1925 struct part_info *part;
1926 u8 pnum;
1927
1928 if (mtdparts_init() !=0)
1929 return 1;
1930
1931 if (argc < 2) {
1932 printf("no partition id specified\n");
1933 return 1;
1934 }
1935
1936 if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0)
1937 return 1;
1938
1939 current_mtd_dev = dev;
1940 current_mtd_partnum = pnum;
1941 current_save();
1942
1943 printf("partition changed to %s%d,%d\n",
1944 MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum);
1945
1946 return 0;
1947 }
1948
1949 /**
1950 * Routine implementing u-boot mtdparts command. Initialize/update default global
1951 * partition list and process user partition request (list, add, del).
1952 *
1953 * @param cmdtp command internal data
1954 * @param flag command flag
1955 * @param argc number of arguments supplied to the command
1956 * @param argv arguments list
1957 * @return 0 on success, 1 otherwise
1958 */
1959 static int do_mtdparts(struct cmd_tbl *cmdtp, int flag, int argc,
1960 char *const argv[])
1961 {
1962 if (argc == 2) {
1963 if (strcmp(argv[1], "default") == 0) {
1964 env_set("mtdids", NULL);
1965 env_set("mtdparts", NULL);
1966 env_set("partition", NULL);
1967 use_defaults = 1;
1968
1969 mtdparts_init();
1970 return 0;
1971 } else if (strcmp(argv[1], "delall") == 0) {
1972 /* this may be the first run, initialize lists if needed */
1973 mtdparts_init();
1974
1975 env_set("mtdparts", NULL);
1976
1977 /* mtd_devices_init() calls current_save() */
1978 return mtd_devices_init();
1979 }
1980 }
1981
1982 /* make sure we are in sync with env variables */
1983 if (mtdparts_init() != 0)
1984 return 1;
1985
1986 if (argc == 1) {
1987 list_partitions();
1988 return 0;
1989 }
1990
1991 /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */
1992 if (((argc == 5) || (argc == 6)) && (strncmp(argv[1], "add", 3) == 0)) {
1993 #define PART_ADD_DESC_MAXLEN 64
1994 char tmpbuf[PART_ADD_DESC_MAXLEN];
1995 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
1996 struct mtd_info *mtd;
1997 uint64_t next_offset;
1998 #endif
1999 u8 type, num, len;
2000 struct mtd_device *dev;
2001 struct mtd_device *dev_tmp;
2002 struct mtdids *id;
2003 struct part_info *p;
2004
2005 if (mtd_id_parse(argv[2], NULL, &type, &num) != 0)
2006 return 1;
2007
2008 if ((id = id_find(type, num)) == NULL) {
2009 printf("no such device %s defined in mtdids variable\n", argv[2]);
2010 return 1;
2011 }
2012
2013 len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */
2014 len += strlen(argv[3]); /* size@offset */
2015 len += strlen(argv[4]) + 2; /* '(' name ')' */
2016 if (argv[5] && (strlen(argv[5]) == 2))
2017 len += 2; /* 'ro' */
2018
2019 if (len >= PART_ADD_DESC_MAXLEN) {
2020 printf("too long partition description\n");
2021 return 1;
2022 }
2023 sprintf(tmpbuf, "%s:%s(%s)%s",
2024 id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : "");
2025 debug("add tmpbuf: %s\n", tmpbuf);
2026
2027 if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev))
2028 return 1;
2029
2030 debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type),
2031 dev->id->num, dev->id->mtd_id);
2032
2033 p = list_entry(dev->parts.next, struct part_info, link);
2034
2035 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2036 if (get_mtd_info(dev->id->type, dev->id->num, &mtd))
2037 return 1;
2038
2039 if (!strcmp(&argv[1][3], ".spread")) {
2040 spread_partition(mtd, p, &next_offset);
2041 debug("increased %s to %llu bytes\n", p->name, p->size);
2042 }
2043 #endif
2044
2045 dev_tmp = device_find(dev->id->type, dev->id->num);
2046 if (dev_tmp == NULL) {
2047 device_add(dev);
2048 } else if (part_add(dev_tmp, p) != 0) {
2049 /* merge new partition with existing ones*/
2050 device_del(dev);
2051 return 1;
2052 }
2053
2054 if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) {
2055 printf("generated mtdparts too long, resetting to null\n");
2056 return 1;
2057 }
2058
2059 return 0;
2060 }
2061
2062 /* mtdparts del part-id */
2063 if ((argc == 3) && (strcmp(argv[1], "del") == 0)) {
2064 debug("del: part-id = %s\n", argv[2]);
2065
2066 return delete_partition(argv[2]);
2067 }
2068
2069 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2070 if ((argc == 2) && (strcmp(argv[1], "spread") == 0))
2071 return spread_partitions();
2072 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2073
2074 return CMD_RET_USAGE;
2075 }
2076
2077 /***************************************************/
2078 U_BOOT_CMD(
2079 chpart, 2, 0, do_chpart,
2080 "change active partition",
2081 "part-id\n"
2082 " - change active partition (e.g. part-id = nand0,1)"
2083 );
2084
2085 #ifdef CONFIG_SYS_LONGHELP
2086 static char mtdparts_help_text[] =
2087 "\n"
2088 " - list partition table\n"
2089 "mtdparts delall\n"
2090 " - delete all partitions\n"
2091 "mtdparts del part-id\n"
2092 " - delete partition (e.g. part-id = nand0,1)\n"
2093 "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2094 " - add partition\n"
2095 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2096 "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n"
2097 " - add partition, padding size by skipping bad blocks\n"
2098 #endif
2099 "mtdparts default\n"
2100 " - reset partition table to defaults\n"
2101 #if defined(CONFIG_CMD_MTDPARTS_SPREAD)
2102 "mtdparts spread\n"
2103 " - adjust the sizes of the partitions so they are\n"
2104 " at least as big as the mtdparts variable specifies\n"
2105 " and they each start on a good block\n\n"
2106 #else
2107 "\n"
2108 #endif /* CONFIG_CMD_MTDPARTS_SPREAD */
2109 "-----\n\n"
2110 "this command uses three environment variables:\n\n"
2111 "'partition' - keeps current partition identifier\n\n"
2112 "partition := <part-id>\n"
2113 "<part-id> := <dev-id>,part_num\n\n"
2114 "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n"
2115 "mtdids=<idmap>[,<idmap>,...]\n\n"
2116 "<idmap> := <dev-id>=<mtd-id>\n"
2117 "<dev-id> := 'nand'|'nor'|'onenand'|'spi-nand'<dev-num>\n"
2118 "<dev-num> := mtd device number, 0...\n"
2119 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n"
2120 "'mtdparts' - partition list\n\n"
2121 "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n"
2122 "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n"
2123 "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n"
2124 "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n"
2125 "<size> := standard linux memsize OR '-' to denote all remaining space\n"
2126 "<offset> := partition start offset within the device\n"
2127 "<name> := '(' NAME ')'\n"
2128 "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)";
2129 #endif
2130
2131 U_BOOT_CMD(
2132 mtdparts, 6, 0, do_mtdparts,
2133 "define flash/nand partitions", mtdparts_help_text
2134 );
2135 /***************************************************/
2136