git.sur5r.net Git - u-boot/blob - common/cmd_ubi.c

   1 /*
   2  * Unsorted Block Image commands
   3  *
   4  *  Copyright (C) 2008 Samsung Electronics
   5  *  Kyungmin Park <kyungmin.park@samsung.com>
   6  *
   7  * Copyright 2008-2009 Stefan Roese <sr@denx.de>, DENX Software Engineering
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <common.h>
  15 #include <command.h>
  16 #include <exports.h>
  17
  18 #include <nand.h>
  19 #include <onenand_uboot.h>
  20 #include <linux/mtd/mtd.h>
  21 #include <linux/mtd/partitions.h>
  22 #include <ubi_uboot.h>
  23 #include <asm/errno.h>
  24 #include <jffs2/load_kernel.h>
  25
  26 #undef ubi_msg
  27 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
  28
  29 #define DEV_TYPE_NONE           0
  30 #define DEV_TYPE_NAND           1
  31 #define DEV_TYPE_ONENAND        2
  32 #define DEV_TYPE_NOR            3
  33
  34 /* Private own data */
  35 static struct ubi_device *ubi;
  36 static char buffer[80];
  37 static int ubi_initialized;
  38
  39 struct selected_dev {
  40         char part_name[80];
  41         int selected;
  42         int nr;
  43         struct mtd_info *mtd_info;
  44 };
  45
  46 static struct selected_dev ubi_dev;
  47
  48 #ifdef CONFIG_CMD_UBIFS
  49 int ubifs_is_mounted(void);
  50 void cmd_ubifs_umount(void);
  51 #endif
  52
  53 static void ubi_dump_vol_info(const struct ubi_volume *vol)
  54 {
  55         ubi_msg("volume information dump:");
  56         ubi_msg("vol_id          %d", vol->vol_id);
  57         ubi_msg("reserved_pebs   %d", vol->reserved_pebs);
  58         ubi_msg("alignment       %d", vol->alignment);
  59         ubi_msg("data_pad        %d", vol->data_pad);
  60         ubi_msg("vol_type        %d", vol->vol_type);
  61         ubi_msg("name_len        %d", vol->name_len);
  62         ubi_msg("usable_leb_size %d", vol->usable_leb_size);
  63         ubi_msg("used_ebs        %d", vol->used_ebs);
  64         ubi_msg("used_bytes      %lld", vol->used_bytes);
  65         ubi_msg("last_eb_bytes   %d", vol->last_eb_bytes);
  66         ubi_msg("corrupted       %d", vol->corrupted);
  67         ubi_msg("upd_marker      %d", vol->upd_marker);
  68
  69         if (vol->name_len <= UBI_VOL_NAME_MAX &&
  70                 strnlen(vol->name, vol->name_len + 1) == vol->name_len) {
  71                 ubi_msg("name            %s", vol->name);
  72         } else {
  73                 ubi_msg("the 1st 5 characters of the name: %c%c%c%c%c",
  74                                 vol->name[0], vol->name[1], vol->name[2],
  75                                 vol->name[3], vol->name[4]);
  76         }
  77         printf("\n");
  78 }
  79
  80 static void display_volume_info(struct ubi_device *ubi)
  81 {
  82         int i;
  83
  84         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  85                 if (!ubi->volumes[i])
  86                         continue;       /* Empty record */
  87                 ubi_dump_vol_info(ubi->volumes[i]);
  88         }
  89 }
  90
  91 static void display_ubi_info(struct ubi_device *ubi)
  92 {
  93         ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
  94         ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
  95         ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
  96                         ubi->peb_size, ubi->peb_size >> 10);
  97         ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
  98         ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
  99         ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
 100         ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
 101         ubi_msg("VID header offset:          %d (aligned %d)",
 102                         ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
 103         ubi_msg("data offset:                %d", ubi->leb_start);
 104         ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
 105         ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
 106         ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
 107         ubi_msg("number of user volumes:     %d",
 108                         ubi->vol_count - UBI_INT_VOL_COUNT);
 109         ubi_msg("available PEBs:             %d", ubi->avail_pebs);
 110         ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
 111         ubi_msg("number of PEBs reserved for bad PEB handling: %d",
 112                         ubi->beb_rsvd_pebs);
 113         ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
 114 }
 115
 116 static int ubi_info(int layout)
 117 {
 118         if (layout)
 119                 display_volume_info(ubi);
 120         else
 121                 display_ubi_info(ubi);
 122
 123         return 0;
 124 }
 125
 126 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
 127 {
 128         return strcmp(vol->name, name);
 129 }
 130
 131 static int ubi_check(char *name)
 132 {
 133         int i;
 134
 135         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
 136                 if (!ubi->volumes[i])
 137                         continue;       /* Empty record */
 138
 139                 if (!ubi_check_volumename(ubi->volumes[i], name))
 140                         return 0;
 141         }
 142
 143         return -EEXIST;
 144 }
 145
 146
 147 static int verify_mkvol_req(const struct ubi_device *ubi,
 148                             const struct ubi_mkvol_req *req)
 149 {
 150         int n, err = EINVAL;
 151
 152         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
 153             req->name_len < 0)
 154                 goto bad;
 155
 156         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
 157             req->vol_id != UBI_VOL_NUM_AUTO)
 158                 goto bad;
 159
 160         if (req->alignment == 0)
 161                 goto bad;
 162
 163         if (req->bytes == 0) {
 164                 printf("No space left in UBI device!\n");
 165                 err = ENOMEM;
 166                 goto bad;
 167         }
 168
 169         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
 170             req->vol_type != UBI_STATIC_VOLUME)
 171                 goto bad;
 172
 173         if (req->alignment > ubi->leb_size)
 174                 goto bad;
 175
 176         n = req->alignment % ubi->min_io_size;
 177         if (req->alignment != 1 && n)
 178                 goto bad;
 179
 180         if (req->name_len > UBI_VOL_NAME_MAX) {
 181                 printf("Name too long!\n");
 182                 err = ENAMETOOLONG;
 183                 goto bad;
 184         }
 185
 186         return 0;
 187 bad:
 188         return err;
 189 }
 190
 191 static int ubi_create_vol(char *volume, int64_t size, int dynamic)
 192 {
 193         struct ubi_mkvol_req req;
 194         int err;
 195
 196         if (dynamic)
 197                 req.vol_type = UBI_DYNAMIC_VOLUME;
 198         else
 199                 req.vol_type = UBI_STATIC_VOLUME;
 200
 201         req.vol_id = UBI_VOL_NUM_AUTO;
 202         req.alignment = 1;
 203         req.bytes = size;
 204
 205         strcpy(req.name, volume);
 206         req.name_len = strlen(volume);
 207         req.name[req.name_len] = '\0';
 208         req.padding1 = 0;
 209         /* It's duplicated at drivers/mtd/ubi/cdev.c */
 210         err = verify_mkvol_req(ubi, &req);
 211         if (err) {
 212                 printf("verify_mkvol_req failed %d\n", err);
 213                 return err;
 214         }
 215         printf("Creating %s volume %s of size %lld\n",
 216                 dynamic ? "dynamic" : "static", volume, size);
 217         /* Call real ubi create volume */
 218         return ubi_create_volume(ubi, &req);
 219 }
 220
 221 static struct ubi_volume *ubi_find_volume(char *volume)
 222 {
 223         struct ubi_volume *vol = NULL;
 224         int i;
 225
 226         for (i = 0; i < ubi->vtbl_slots; i++) {
 227                 vol = ubi->volumes[i];
 228                 if (vol && !strcmp(vol->name, volume))
 229                         return vol;
 230         }
 231
 232         printf("Volume %s not found!\n", volume);
 233         return NULL;
 234 }
 235
 236 static int ubi_remove_vol(char *volume)
 237 {
 238         int err, reserved_pebs, i;
 239         struct ubi_volume *vol;
 240
 241         vol = ubi_find_volume(volume);
 242         if (vol == NULL)
 243                 return ENODEV;
 244
 245         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
 246
 247         if (ubi->ro_mode) {
 248                 printf("It's read-only mode\n");
 249                 err = EROFS;
 250                 goto out_err;
 251         }
 252
 253         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
 254         if (err) {
 255                 printf("Error changing Vol tabel record err=%x\n", err);
 256                 goto out_err;
 257         }
 258         reserved_pebs = vol->reserved_pebs;
 259         for (i = 0; i < vol->reserved_pebs; i++) {
 260                 err = ubi_eba_unmap_leb(ubi, vol, i);
 261                 if (err)
 262                         goto out_err;
 263         }
 264
 265         kfree(vol->eba_tbl);
 266         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
 267         ubi->volumes[vol->vol_id] = NULL;
 268
 269         ubi->rsvd_pebs -= reserved_pebs;
 270         ubi->avail_pebs += reserved_pebs;
 271         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
 272         if (i > 0) {
 273                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
 274                 ubi->avail_pebs -= i;
 275                 ubi->rsvd_pebs += i;
 276                 ubi->beb_rsvd_pebs += i;
 277                 if (i > 0)
 278                         ubi_msg("reserve more %d PEBs", i);
 279         }
 280         ubi->vol_count -= 1;
 281
 282         return 0;
 283 out_err:
 284         ubi_err("cannot remove volume %s, error %d", volume, err);
 285         if (err < 0)
 286                 err = -err;
 287         return err;
 288 }
 289
 290 int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 291 {
 292         int err = 1;
 293         struct ubi_volume *vol;
 294
 295         vol = ubi_find_volume(volume);
 296         if (vol == NULL)
 297                 return ENODEV;
 298
 299         err = ubi_more_update_data(ubi, vol, buf, size);
 300         if (err < 0) {
 301                 printf("Couldnt or partially wrote data\n");
 302                 return -err;
 303         }
 304
 305         if (err) {
 306                 size = err;
 307
 308                 err = ubi_check_volume(ubi, vol->vol_id);
 309                 if (err < 0)
 310                         return -err;
 311
 312                 if (err) {
 313                         ubi_warn("volume %d on UBI device %d is corrupted",
 314                                         vol->vol_id, ubi->ubi_num);
 315                         vol->corrupted = 1;
 316                 }
 317
 318                 vol->checked = 1;
 319                 ubi_gluebi_updated(vol);
 320         }
 321
 322         return 0;
 323 }
 324
 325 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 326         size_t full_size)
 327 {
 328         int err = 1;
 329         int rsvd_bytes = 0;
 330         struct ubi_volume *vol;
 331
 332         vol = ubi_find_volume(volume);
 333         if (vol == NULL)
 334                 return ENODEV;
 335
 336         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 337         if (size < 0 || size > rsvd_bytes) {
 338                 printf("size > volume size! Aborting!\n");
 339                 return EINVAL;
 340         }
 341
 342         err = ubi_start_update(ubi, vol, full_size);
 343         if (err < 0) {
 344                 printf("Cannot start volume update\n");
 345                 return -err;
 346         }
 347
 348         return ubi_volume_continue_write(volume, buf, size);
 349 }
 350
 351 int ubi_volume_write(char *volume, void *buf, size_t size)
 352 {
 353         return ubi_volume_begin_write(volume, buf, size, size);
 354 }
 355
 356 int ubi_volume_read(char *volume, char *buf, size_t size)
 357 {
 358         int err, lnum, off, len, tbuf_size;
 359         void *tbuf;
 360         unsigned long long tmp;
 361         struct ubi_volume *vol;
 362         loff_t offp = 0;
 363
 364         vol = ubi_find_volume(volume);
 365         if (vol == NULL)
 366                 return ENODEV;
 367
 368         if (vol->updating) {
 369                 printf("updating");
 370                 return EBUSY;
 371         }
 372         if (vol->upd_marker) {
 373                 printf("damaged volume, update marker is set");
 374                 return EBADF;
 375         }
 376         if (offp == vol->used_bytes)
 377                 return 0;
 378
 379         if (size == 0) {
 380                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 381                 size = vol->used_bytes;
 382         }
 383
 384         if (vol->corrupted)
 385                 printf("read from corrupted volume %d", vol->vol_id);
 386         if (offp + size > vol->used_bytes)
 387                 size = vol->used_bytes - offp;
 388
 389         tbuf_size = vol->usable_leb_size;
 390         if (size < tbuf_size)
 391                 tbuf_size = ALIGN(size, ubi->min_io_size);
 392         tbuf = malloc(tbuf_size);
 393         if (!tbuf) {
 394                 printf("NO MEM\n");
 395                 return ENOMEM;
 396         }
 397         len = size > tbuf_size ? tbuf_size : size;
 398
 399         tmp = offp;
 400         off = do_div(tmp, vol->usable_leb_size);
 401         lnum = tmp;
 402         do {
 403                 if (off + len >= vol->usable_leb_size)
 404                         len = vol->usable_leb_size - off;
 405
 406                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 407                 if (err) {
 408                         printf("read err %x\n", err);
 409                         err = -err;
 410                         break;
 411                 }
 412                 off += len;
 413                 if (off == vol->usable_leb_size) {
 414                         lnum += 1;
 415                         off -= vol->usable_leb_size;
 416                 }
 417
 418                 size -= len;
 419                 offp += len;
 420
 421                 memcpy(buf, tbuf, len);
 422
 423                 buf += len;
 424                 len = size > tbuf_size ? tbuf_size : size;
 425         } while (size);
 426
 427         free(tbuf);
 428         return err;
 429 }
 430
 431 static int ubi_dev_scan(struct mtd_info *info, char *ubidev,
 432                 const char *vid_header_offset)
 433 {
 434         struct mtd_device *dev;
 435         struct part_info *part;
 436         struct mtd_partition mtd_part;
 437         char ubi_mtd_param_buffer[80];
 438         u8 pnum;
 439         int err;
 440
 441         if (find_dev_and_part(ubidev, &dev, &pnum, &part) != 0)
 442                 return 1;
 443
 444         sprintf(buffer, "mtd=%d", pnum);
 445         memset(&mtd_part, 0, sizeof(mtd_part));
 446         mtd_part.name = buffer;
 447         mtd_part.size = part->size;
 448         mtd_part.offset = part->offset;
 449         add_mtd_partitions(info, &mtd_part, 1);
 450
 451         strcpy(ubi_mtd_param_buffer, buffer);
 452         if (vid_header_offset)
 453                 sprintf(ubi_mtd_param_buffer, "mtd=%d,%s", pnum,
 454                                 vid_header_offset);
 455         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 456         if (err) {
 457                 del_mtd_partitions(info);
 458                 return -err;
 459         }
 460
 461         err = ubi_init();
 462         if (err) {
 463                 del_mtd_partitions(info);
 464                 return -err;
 465         }
 466
 467         ubi_initialized = 1;
 468
 469         return 0;
 470 }
 471
 472 int ubi_part(char *part_name, const char *vid_header_offset)
 473 {
 474         int err = 0;
 475         char mtd_dev[16];
 476         struct mtd_device *dev;
 477         struct part_info *part;
 478         u8 pnum;
 479
 480         if (mtdparts_init() != 0) {
 481                 printf("Error initializing mtdparts!\n");
 482                 return 1;
 483         }
 484
 485 #ifdef CONFIG_CMD_UBIFS
 486         /*
 487          * Automatically unmount UBIFS partition when user
 488          * changes the UBI device. Otherwise the following
 489          * UBIFS commands will crash.
 490          */
 491         if (ubifs_is_mounted())
 492                 cmd_ubifs_umount();
 493 #endif
 494
 495         /* todo: get dev number for NAND... */
 496         ubi_dev.nr = 0;
 497
 498         /*
 499          * Call ubi_exit() before re-initializing the UBI subsystem
 500          */
 501         if (ubi_initialized) {
 502                 ubi_exit();
 503                 del_mtd_partitions(ubi_dev.mtd_info);
 504         }
 505
 506         /*
 507          * Search the mtd device number where this partition
 508          * is located
 509          */
 510         if (find_dev_and_part(part_name, &dev, &pnum, &part)) {
 511                 printf("Partition %s not found!\n", part_name);
 512                 return 1;
 513         }
 514         sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(dev->id->type), dev->id->num);
 515         ubi_dev.mtd_info = get_mtd_device_nm(mtd_dev);
 516         if (IS_ERR(ubi_dev.mtd_info)) {
 517                 printf("Partition %s not found on device %s!\n", part_name,
 518                        mtd_dev);
 519                 return 1;
 520         }
 521
 522         ubi_dev.selected = 1;
 523
 524         strcpy(ubi_dev.part_name, part_name);
 525         err = ubi_dev_scan(ubi_dev.mtd_info, ubi_dev.part_name,
 526                         vid_header_offset);
 527         if (err) {
 528                 printf("UBI init error %d\n", err);
 529                 ubi_dev.selected = 0;
 530                 return err;
 531         }
 532
 533         ubi = ubi_devices[0];
 534
 535         return 0;
 536 }
 537
 538 static int do_ubi(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 539 {
 540         int64_t size = 0;
 541         ulong addr = 0;
 542
 543         if (argc < 2)
 544                 return CMD_RET_USAGE;
 545
 546         if (strcmp(argv[1], "part") == 0) {
 547                 const char *vid_header_offset = NULL;
 548
 549                 /* Print current partition */
 550                 if (argc == 2) {
 551                         if (!ubi_dev.selected) {
 552                                 printf("Error, no UBI device/partition selected!\n");
 553                                 return 1;
 554                         }
 555
 556                         printf("Device %d: %s, partition %s\n",
 557                                ubi_dev.nr, ubi_dev.mtd_info->name, ubi_dev.part_name);
 558                         return 0;
 559                 }
 560
 561                 if (argc < 3)
 562                         return CMD_RET_USAGE;
 563
 564                 if (argc > 3)
 565                         vid_header_offset = argv[3];
 566
 567                 return ubi_part(argv[2], vid_header_offset);
 568         }
 569
 570         if ((strcmp(argv[1], "part") != 0) && (!ubi_dev.selected)) {
 571                 printf("Error, no UBI device/partition selected!\n");
 572                 return 1;
 573         }
 574
 575         if (strcmp(argv[1], "info") == 0) {
 576                 int layout = 0;
 577                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 578                         layout = 1;
 579                 return ubi_info(layout);
 580         }
 581
 582         if (strcmp(argv[1], "check") == 0) {
 583                 if (argc > 2)
 584                         return ubi_check(argv[2]);
 585
 586                 printf("Error, no volume name passed\n");
 587                 return 1;
 588         }
 589
 590         if (strncmp(argv[1], "create", 6) == 0) {
 591                 int dynamic = 1;        /* default: dynamic volume */
 592
 593                 /* Use maximum available size */
 594                 size = 0;
 595
 596                 /* E.g., create volume size type */
 597                 if (argc == 5) {
 598                         if (strncmp(argv[4], "s", 1) == 0)
 599                                 dynamic = 0;
 600                         else if (strncmp(argv[4], "d", 1) != 0) {
 601                                 printf("Incorrect type\n");
 602                                 return 1;
 603                         }
 604                         argc--;
 605                 }
 606                 /* E.g., create volume size */
 607                 if (argc == 4) {
 608                         size = simple_strtoull(argv[3], NULL, 16);
 609                         argc--;
 610                 }
 611                 /* Use maximum available size */
 612                 if (!size) {
 613                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 614                         printf("No size specified -> Using max size (%lld)\n", size);
 615                 }
 616                 /* E.g., create volume */
 617                 if (argc == 3)
 618                         return ubi_create_vol(argv[2], size, dynamic);
 619         }
 620
 621         if (strncmp(argv[1], "remove", 6) == 0) {
 622                 /* E.g., remove volume */
 623                 if (argc == 3)
 624                         return ubi_remove_vol(argv[2]);
 625         }
 626
 627         if (strncmp(argv[1], "write", 5) == 0) {
 628                 int ret;
 629
 630                 if (argc < 5) {
 631                         printf("Please see usage\n");
 632                         return 1;
 633                 }
 634
 635                 addr = simple_strtoul(argv[2], NULL, 16);
 636                 size = simple_strtoul(argv[4], NULL, 16);
 637
 638                 if (strlen(argv[1]) == 10 &&
 639                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 640                         if (argc < 6) {
 641                                 ret = ubi_volume_continue_write(argv[3],
 642                                                 (void *)addr, size);
 643                         } else {
 644                                 size_t full_size;
 645                                 full_size = simple_strtoul(argv[5], NULL, 16);
 646                                 ret = ubi_volume_begin_write(argv[3],
 647                                                 (void *)addr, size, full_size);
 648                         }
 649                 } else {
 650                         ret = ubi_volume_write(argv[3], (void *)addr, size);
 651                 }
 652                 if (!ret) {
 653                         printf("%lld bytes written to volume %s\n", size,
 654                                argv[3]);
 655                 }
 656
 657                 return ret;
 658         }
 659
 660         if (strncmp(argv[1], "read", 4) == 0) {
 661                 size = 0;
 662
 663                 /* E.g., read volume size */
 664                 if (argc == 5) {
 665                         size = simple_strtoul(argv[4], NULL, 16);
 666                         argc--;
 667                 }
 668
 669                 /* E.g., read volume */
 670                 if (argc == 4) {
 671                         addr = simple_strtoul(argv[2], NULL, 16);
 672                         argc--;
 673                 }
 674
 675                 if (argc == 3) {
 676                         printf("Read %lld bytes from volume %s to %lx\n", size,
 677                                argv[3], addr);
 678
 679                         return ubi_volume_read(argv[3], (char *)addr, size);
 680                 }
 681         }
 682
 683         printf("Please see usage\n");
 684         return 1;
 685 }
 686
 687 U_BOOT_CMD(
 688         ubi, 6, 1, do_ubi,
 689         "ubi commands",
 690         "part [part] [offset]\n"
 691                 " - Show or set current partition (with optional VID"
 692                 " header offset)\n"
 693         "ubi info [l[ayout]]"
 694                 " - Display volume and ubi layout information\n"
 695         "ubi check volumename"
 696                 " - check if volumename exists\n"
 697         "ubi create[vol] volume [size] [type]"
 698                 " - create volume name with size\n"
 699         "ubi write[vol] address volume size"
 700                 " - Write volume from address with size\n"
 701         "ubi write.part address volume size [fullsize]\n"
 702                 " - Write part of a volume from address\n"
 703         "ubi read[vol] address volume [size]"
 704                 " - Read volume to address with size\n"
 705         "ubi remove[vol] volume"
 706                 " - Remove volume\n"
 707         "[Legends]\n"
 708         " volume: character name\n"
 709         " size: specified in bytes\n"
 710         " type: s[tatic] or d[ynamic] (default=dynamic)"
 711 );