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 <env.h>
  17 #include <exports.h>
  18 #include <malloc.h>
  19 #include <memalign.h>
  20 #include <mtd.h>
  21 #include <nand.h>
  22 #include <onenand_uboot.h>
  23 #include <dm/devres.h>
  24 #include <linux/mtd/mtd.h>
  25 #include <linux/mtd/partitions.h>
  26 #include <linux/err.h>
  27 #include <ubi_uboot.h>
  28 #include <linux/errno.h>
  29 #include <jffs2/load_kernel.h>
  30
  31 #undef ubi_msg
  32 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
  33
  34 /* Private own data */
  35 static struct ubi_device *ubi;
  36
  37 #ifdef CONFIG_CMD_UBIFS
  38 #include <ubifs_uboot.h>
  39 #endif
  40
  41 static void display_volume_info(struct ubi_device *ubi)
  42 {
  43         int i;
  44
  45         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  46                 if (!ubi->volumes[i])
  47                         continue;       /* Empty record */
  48                 ubi_dump_vol_info(ubi->volumes[i]);
  49         }
  50 }
  51
  52 static void display_ubi_info(struct ubi_device *ubi)
  53 {
  54         ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
  55         ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
  56         ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
  57                         ubi->peb_size, ubi->peb_size >> 10);
  58         ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
  59         ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
  60         ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
  61         ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
  62         ubi_msg("VID header offset:          %d (aligned %d)",
  63                         ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
  64         ubi_msg("data offset:                %d", ubi->leb_start);
  65         ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
  66         ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
  67         ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
  68         ubi_msg("number of user volumes:     %d",
  69                         ubi->vol_count - UBI_INT_VOL_COUNT);
  70         ubi_msg("available PEBs:             %d", ubi->avail_pebs);
  71         ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
  72         ubi_msg("number of PEBs reserved for bad PEB handling: %d",
  73                         ubi->beb_rsvd_pebs);
  74         ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
  75 }
  76
  77 static int ubi_info(int layout)
  78 {
  79         if (layout)
  80                 display_volume_info(ubi);
  81         else
  82                 display_ubi_info(ubi);
  83
  84         return 0;
  85 }
  86
  87 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
  88 {
  89         return strcmp(vol->name, name);
  90 }
  91
  92 static int ubi_check(char *name)
  93 {
  94         int i;
  95
  96         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  97                 if (!ubi->volumes[i])
  98                         continue;       /* Empty record */
  99
 100                 if (!ubi_check_volumename(ubi->volumes[i], name))
 101                         return 0;
 102         }
 103
 104         return 1;
 105 }
 106
 107 static int verify_mkvol_req(const struct ubi_device *ubi,
 108                             const struct ubi_mkvol_req *req)
 109 {
 110         int n, err = EINVAL;
 111
 112         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
 113             req->name_len < 0)
 114                 goto bad;
 115
 116         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
 117             req->vol_id != UBI_VOL_NUM_AUTO)
 118                 goto bad;
 119
 120         if (req->alignment == 0)
 121                 goto bad;
 122
 123         if (req->bytes == 0) {
 124                 printf("No space left in UBI device!\n");
 125                 err = ENOMEM;
 126                 goto bad;
 127         }
 128
 129         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
 130             req->vol_type != UBI_STATIC_VOLUME)
 131                 goto bad;
 132
 133         if (req->alignment > ubi->leb_size)
 134                 goto bad;
 135
 136         n = req->alignment % ubi->min_io_size;
 137         if (req->alignment != 1 && n)
 138                 goto bad;
 139
 140         if (req->name_len > UBI_VOL_NAME_MAX) {
 141                 printf("Name too long!\n");
 142                 err = ENAMETOOLONG;
 143                 goto bad;
 144         }
 145
 146         return 0;
 147 bad:
 148         return err;
 149 }
 150
 151 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id,
 152                           bool skipcheck)
 153 {
 154         struct ubi_mkvol_req req;
 155         int err;
 156
 157         if (dynamic)
 158                 req.vol_type = UBI_DYNAMIC_VOLUME;
 159         else
 160                 req.vol_type = UBI_STATIC_VOLUME;
 161
 162         req.vol_id = vol_id;
 163         req.alignment = 1;
 164         req.bytes = size;
 165
 166         strcpy(req.name, volume);
 167         req.name_len = strlen(volume);
 168         req.name[req.name_len] = '\0';
 169         req.flags = 0;
 170         if (skipcheck)
 171                 req.flags |= UBI_VOL_SKIP_CRC_CHECK_FLG;
 172
 173         /* It's duplicated at drivers/mtd/ubi/cdev.c */
 174         err = verify_mkvol_req(ubi, &req);
 175         if (err) {
 176                 printf("verify_mkvol_req failed %d\n", err);
 177                 return err;
 178         }
 179         printf("Creating %s volume %s of size %lld\n",
 180                 dynamic ? "dynamic" : "static", volume, size);
 181         /* Call real ubi create volume */
 182         return ubi_create_volume(ubi, &req);
 183 }
 184
 185 static struct ubi_volume *ubi_find_volume(char *volume)
 186 {
 187         struct ubi_volume *vol = NULL;
 188         int i;
 189
 190         for (i = 0; i < ubi->vtbl_slots; i++) {
 191                 vol = ubi->volumes[i];
 192                 if (vol && !strcmp(vol->name, volume))
 193                         return vol;
 194         }
 195
 196         printf("Volume %s not found!\n", volume);
 197         return NULL;
 198 }
 199
 200 static int ubi_remove_vol(char *volume)
 201 {
 202         int err, reserved_pebs, i;
 203         struct ubi_volume *vol;
 204
 205         vol = ubi_find_volume(volume);
 206         if (vol == NULL)
 207                 return ENODEV;
 208
 209         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
 210
 211         if (ubi->ro_mode) {
 212                 printf("It's read-only mode\n");
 213                 err = EROFS;
 214                 goto out_err;
 215         }
 216
 217         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
 218         if (err) {
 219                 printf("Error changing Vol tabel record err=%x\n", err);
 220                 goto out_err;
 221         }
 222         reserved_pebs = vol->reserved_pebs;
 223         for (i = 0; i < vol->reserved_pebs; i++) {
 224                 err = ubi_eba_unmap_leb(ubi, vol, i);
 225                 if (err)
 226                         goto out_err;
 227         }
 228
 229         kfree(vol->eba_tbl);
 230         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
 231         ubi->volumes[vol->vol_id] = NULL;
 232
 233         ubi->rsvd_pebs -= reserved_pebs;
 234         ubi->avail_pebs += reserved_pebs;
 235         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
 236         if (i > 0) {
 237                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
 238                 ubi->avail_pebs -= i;
 239                 ubi->rsvd_pebs += i;
 240                 ubi->beb_rsvd_pebs += i;
 241                 if (i > 0)
 242                         ubi_msg("reserve more %d PEBs", i);
 243         }
 244         ubi->vol_count -= 1;
 245
 246         return 0;
 247 out_err:
 248         ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
 249         if (err < 0)
 250                 err = -err;
 251         return err;
 252 }
 253
 254 static int ubi_rename_vol(char *oldname, char *newname)
 255 {
 256         struct ubi_volume *vol;
 257         struct ubi_rename_entry rename;
 258         struct ubi_volume_desc desc;
 259         struct list_head list;
 260
 261         vol = ubi_find_volume(oldname);
 262         if (!vol) {
 263                 printf("%s: volume %s doesn't exist\n", __func__, oldname);
 264                 return ENODEV;
 265         }
 266
 267         if (!ubi_check(newname)) {
 268                 printf("%s: volume %s already exist\n", __func__, newname);
 269                 return EINVAL;
 270         }
 271
 272         printf("Rename UBI volume %s to %s\n", oldname, newname);
 273
 274         if (ubi->ro_mode) {
 275                 printf("%s: ubi device is in read-only mode\n", __func__);
 276                 return EROFS;
 277         }
 278
 279         rename.new_name_len = strlen(newname);
 280         strcpy(rename.new_name, newname);
 281         rename.remove = 0;
 282         desc.vol = vol;
 283         desc.mode = 0;
 284         rename.desc = &desc;
 285         INIT_LIST_HEAD(&rename.list);
 286         INIT_LIST_HEAD(&list);
 287         list_add(&rename.list, &list);
 288
 289         return ubi_rename_volumes(ubi, &list);
 290 }
 291
 292 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 293 {
 294         int err = 1;
 295         struct ubi_volume *vol;
 296
 297         vol = ubi_find_volume(volume);
 298         if (vol == NULL)
 299                 return ENODEV;
 300
 301         err = ubi_more_update_data(ubi, vol, buf, size);
 302         if (err < 0) {
 303                 printf("Couldnt or partially wrote data\n");
 304                 return -err;
 305         }
 306
 307         if (err) {
 308                 size = err;
 309
 310                 err = ubi_check_volume(ubi, vol->vol_id);
 311                 if (err < 0)
 312                         return -err;
 313
 314                 if (err) {
 315                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
 316                                  vol->vol_id, ubi->ubi_num);
 317                         vol->corrupted = 1;
 318                 }
 319
 320                 vol->checked = 1;
 321                 ubi_gluebi_updated(vol);
 322         }
 323
 324         return 0;
 325 }
 326
 327 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 328         size_t full_size)
 329 {
 330         int err = 1;
 331         int rsvd_bytes = 0;
 332         struct ubi_volume *vol;
 333
 334         vol = ubi_find_volume(volume);
 335         if (vol == NULL)
 336                 return ENODEV;
 337
 338         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 339         if (size > rsvd_bytes) {
 340                 printf("size > volume size! Aborting!\n");
 341                 return EINVAL;
 342         }
 343
 344         err = ubi_start_update(ubi, vol, full_size);
 345         if (err < 0) {
 346                 printf("Cannot start volume update\n");
 347                 return -err;
 348         }
 349
 350         return ubi_volume_continue_write(volume, buf, size);
 351 }
 352
 353 int ubi_volume_write(char *volume, void *buf, size_t size)
 354 {
 355         return ubi_volume_begin_write(volume, buf, size, size);
 356 }
 357
 358 int ubi_volume_read(char *volume, char *buf, size_t size)
 359 {
 360         int err, lnum, off, len, tbuf_size;
 361         void *tbuf;
 362         unsigned long long tmp;
 363         struct ubi_volume *vol;
 364         loff_t offp = 0;
 365         size_t len_read;
 366
 367         vol = ubi_find_volume(volume);
 368         if (vol == NULL)
 369                 return ENODEV;
 370
 371         if (vol->updating) {
 372                 printf("updating");
 373                 return EBUSY;
 374         }
 375         if (vol->upd_marker) {
 376                 printf("damaged volume, update marker is set");
 377                 return EBADF;
 378         }
 379         if (offp == vol->used_bytes)
 380                 return 0;
 381
 382         if (size == 0) {
 383                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 384                 size = vol->used_bytes;
 385         }
 386
 387         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
 388
 389         if (vol->corrupted)
 390                 printf("read from corrupted volume %d", vol->vol_id);
 391         if (offp + size > vol->used_bytes)
 392                 size = vol->used_bytes - offp;
 393
 394         tbuf_size = vol->usable_leb_size;
 395         if (size < tbuf_size)
 396                 tbuf_size = ALIGN(size, ubi->min_io_size);
 397         tbuf = malloc_cache_aligned(tbuf_size);
 398         if (!tbuf) {
 399                 printf("NO MEM\n");
 400                 return ENOMEM;
 401         }
 402         len = size > tbuf_size ? tbuf_size : size;
 403
 404         tmp = offp;
 405         off = do_div(tmp, vol->usable_leb_size);
 406         lnum = tmp;
 407         len_read = size;
 408         do {
 409                 if (off + len >= vol->usable_leb_size)
 410                         len = vol->usable_leb_size - off;
 411
 412                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 413                 if (err) {
 414                         printf("read err %x\n", err);
 415                         err = -err;
 416                         break;
 417                 }
 418                 off += len;
 419                 if (off == vol->usable_leb_size) {
 420                         lnum += 1;
 421                         off -= vol->usable_leb_size;
 422                 }
 423
 424                 size -= len;
 425                 offp += len;
 426
 427                 memcpy(buf, tbuf, len);
 428
 429                 buf += len;
 430                 len = size > tbuf_size ? tbuf_size : size;
 431         } while (size);
 432
 433         if (!size)
 434                 env_set_hex("filesize", len_read);
 435
 436         free(tbuf);
 437         return err;
 438 }
 439
 440 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
 441 {
 442         char ubi_mtd_param_buffer[80];
 443         int err;
 444
 445         if (!vid_header_offset)
 446                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
 447         else
 448                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
 449                         vid_header_offset);
 450
 451         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 452         if (err)
 453                 return -err;
 454
 455         err = ubi_init();
 456         if (err)
 457                 return -err;
 458
 459         return 0;
 460 }
 461
 462 static int ubi_set_skip_check(char *volume, bool skip_check)
 463 {
 464         struct ubi_vtbl_record vtbl_rec;
 465         struct ubi_volume *vol;
 466
 467         vol = ubi_find_volume(volume);
 468         if (!vol)
 469                 return ENODEV;
 470
 471         printf("%sing skip_check on volume %s\n",
 472                skip_check ? "Sett" : "Clear", volume);
 473
 474         vtbl_rec = ubi->vtbl[vol->vol_id];
 475         if (skip_check) {
 476                 vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG;
 477                 vol->skip_check = 1;
 478         } else {
 479                 vtbl_rec.flags &= ~UBI_VTBL_SKIP_CRC_CHECK_FLG;
 480                 vol->skip_check = 0;
 481         }
 482
 483         return ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
 484 }
 485
 486 static int ubi_detach(void)
 487 {
 488 #ifdef CONFIG_CMD_UBIFS
 489         /*
 490          * Automatically unmount UBIFS partition when user
 491          * changes the UBI device. Otherwise the following
 492          * UBIFS commands will crash.
 493          */
 494         if (ubifs_is_mounted())
 495                 cmd_ubifs_umount();
 496 #endif
 497
 498         /*
 499          * Call ubi_exit() before re-initializing the UBI subsystem
 500          */
 501         if (ubi)
 502                 ubi_exit();
 503
 504         ubi = NULL;
 505
 506         return 0;
 507 }
 508
 509 int ubi_part(char *part_name, const char *vid_header_offset)
 510 {
 511         struct mtd_info *mtd;
 512         int err = 0;
 513
 514         if (ubi && ubi->mtd && !strcmp(ubi->mtd->name, part_name)) {
 515                 printf("UBI partition '%s' already selected\n", part_name);
 516                 return 0;
 517         }
 518
 519         ubi_detach();
 520
 521         mtd_probe_devices();
 522         mtd = get_mtd_device_nm(part_name);
 523         if (IS_ERR(mtd)) {
 524                 printf("Partition %s not found!\n", part_name);
 525                 return 1;
 526         }
 527         put_mtd_device(mtd);
 528
 529         err = ubi_dev_scan(mtd, vid_header_offset);
 530         if (err) {
 531                 printf("UBI init error %d\n", err);
 532                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
 533                 return err;
 534         }
 535
 536         ubi = ubi_devices[0];
 537
 538         return 0;
 539 }
 540
 541 static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 542 {
 543         int64_t size = 0;
 544         ulong addr = 0;
 545         bool skipcheck = false;
 546
 547         if (argc < 2)
 548                 return CMD_RET_USAGE;
 549
 550         if (strcmp(argv[1], "detach") == 0)
 551                 return ubi_detach();
 552
 553         if (strcmp(argv[1], "part") == 0) {
 554                 const char *vid_header_offset = NULL;
 555
 556                 /* Print current partition */
 557                 if (argc == 2) {
 558                         if (!ubi) {
 559                                 printf("Error, no UBI device selected!\n");
 560                                 return 1;
 561                         }
 562
 563                         printf("Device %d: %s, MTD partition %s\n",
 564                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
 565                         return 0;
 566                 }
 567
 568                 if (argc < 3)
 569                         return CMD_RET_USAGE;
 570
 571                 if (argc > 3)
 572                         vid_header_offset = argv[3];
 573
 574                 return ubi_part(argv[2], vid_header_offset);
 575         }
 576
 577         if ((strcmp(argv[1], "part") != 0) && !ubi) {
 578                 printf("Error, no UBI device selected!\n");
 579                 return 1;
 580         }
 581
 582         if (strcmp(argv[1], "info") == 0) {
 583                 int layout = 0;
 584                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 585                         layout = 1;
 586                 return ubi_info(layout);
 587         }
 588
 589         if (strcmp(argv[1], "check") == 0) {
 590                 if (argc > 2)
 591                         return ubi_check(argv[2]);
 592
 593                 printf("Error, no volume name passed\n");
 594                 return 1;
 595         }
 596
 597         if (strncmp(argv[1], "create", 6) == 0) {
 598                 int dynamic = 1;        /* default: dynamic volume */
 599                 int id = UBI_VOL_NUM_AUTO;
 600
 601                 /* Use maximum available size */
 602                 size = 0;
 603
 604                 /* E.g., create volume with "skipcheck" bit set */
 605                 if (argc == 7) {
 606                         skipcheck = strncmp(argv[6], "--skipcheck", 11) == 0;
 607                         argc--;
 608                 }
 609
 610                 /* E.g., create volume size type vol_id */
 611                 if (argc == 6) {
 612                         id = simple_strtoull(argv[5], NULL, 16);
 613                         argc--;
 614                 }
 615
 616                 /* E.g., create volume size type */
 617                 if (argc == 5) {
 618                         if (strncmp(argv[4], "s", 1) == 0)
 619                                 dynamic = 0;
 620                         else if (strncmp(argv[4], "d", 1) != 0) {
 621                                 printf("Incorrect type\n");
 622                                 return 1;
 623                         }
 624                         argc--;
 625                 }
 626                 /* E.g., create volume size */
 627                 if (argc == 4) {
 628                         if (argv[3][0] != '-')
 629                                 size = simple_strtoull(argv[3], NULL, 16);
 630                         argc--;
 631                 }
 632                 /* Use maximum available size */
 633                 if (!size) {
 634                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 635                         printf("No size specified -> Using max size (%lld)\n", size);
 636                 }
 637                 /* E.g., create volume */
 638                 if (argc == 3) {
 639                         return ubi_create_vol(argv[2], size, dynamic, id,
 640                                               skipcheck);
 641                 }
 642         }
 643
 644         if (strncmp(argv[1], "remove", 6) == 0) {
 645                 /* E.g., remove volume */
 646                 if (argc == 3)
 647                         return ubi_remove_vol(argv[2]);
 648         }
 649
 650         if (IS_ENABLED(CONFIG_CMD_UBI_RENAME) && !strncmp(argv[1], "rename", 6))
 651                 return ubi_rename_vol(argv[2], argv[3]);
 652
 653         if (strncmp(argv[1], "skipcheck", 9) == 0) {
 654                 /* E.g., change skip_check flag */
 655                 if (argc == 4) {
 656                         skipcheck = strncmp(argv[3], "on", 2) == 0;
 657                         return ubi_set_skip_check(argv[2], skipcheck);
 658                 }
 659         }
 660
 661         if (strncmp(argv[1], "write", 5) == 0) {
 662                 int ret;
 663
 664                 if (argc < 5) {
 665                         printf("Please see usage\n");
 666                         return 1;
 667                 }
 668
 669                 addr = hextoul(argv[2], NULL);
 670                 size = hextoul(argv[4], NULL);
 671
 672                 if (strlen(argv[1]) == 10 &&
 673                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 674                         if (argc < 6) {
 675                                 ret = ubi_volume_continue_write(argv[3],
 676                                                 (void *)addr, size);
 677                         } else {
 678                                 size_t full_size;
 679                                 full_size = hextoul(argv[5], NULL);
 680                                 ret = ubi_volume_begin_write(argv[3],
 681                                                 (void *)addr, size, full_size);
 682                         }
 683                 } else {
 684                         ret = ubi_volume_write(argv[3], (void *)addr, size);
 685                 }
 686                 if (!ret) {
 687                         printf("%lld bytes written to volume %s\n", size,
 688                                argv[3]);
 689                 }
 690
 691                 return ret;
 692         }
 693
 694         if (strncmp(argv[1], "read", 4) == 0) {
 695                 size = 0;
 696
 697                 /* E.g., read volume size */
 698                 if (argc == 5) {
 699                         size = hextoul(argv[4], NULL);
 700                         argc--;
 701                 }
 702
 703                 /* E.g., read volume */
 704                 if (argc == 4) {
 705                         addr = hextoul(argv[2], NULL);
 706                         argc--;
 707                 }
 708
 709                 if (argc == 3) {
 710                         return ubi_volume_read(argv[3], (char *)addr, size);
 711                 }
 712         }
 713
 714         printf("Please see usage\n");
 715         return 1;
 716 }
 717
 718 U_BOOT_CMD(
 719         ubi, 7, 1, do_ubi,
 720         "ubi commands",
 721         "detach"
 722                 " - detach ubi from a mtd partition\n"
 723         "ubi part [part] [offset]\n"
 724                 " - Show or set current partition (with optional VID"
 725                 " header offset)\n"
 726         "ubi info [l[ayout]]"
 727                 " - Display volume and ubi layout information\n"
 728         "ubi check volumename"
 729                 " - check if volumename exists\n"
 730         "ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"
 731                 " - create volume name with size ('-' for maximum"
 732                 " available size)\n"
 733         "ubi write[vol] address volume size"
 734                 " - Write volume from address with size\n"
 735         "ubi write.part address volume size [fullsize]\n"
 736                 " - Write part of a volume from address\n"
 737         "ubi read[vol] address volume [size]"
 738                 " - Read volume to address with size\n"
 739         "ubi remove[vol] volume"
 740                 " - Remove volume\n"
 741 #if IS_ENABLED(CONFIG_CMD_UBI_RENAME)
 742         "ubi rename oldname newname\n"
 743 #endif
 744         "ubi skipcheck volume on/off - Set or clear skip_check flag in volume header\n"
 745         "[Legends]\n"
 746         " volume: character name\n"
 747         " size: specified in bytes\n"
 748         " type: s[tatic] or d[ynamic] (default=dynamic)"
 749 );