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 <command.h>
  15 #include <env.h>
  16 #include <exports.h>
  17 #include <led.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 #include <linux/log2.h>
  31
  32 #undef ubi_msg
  33 #define ubi_msg(fmt, ...) printf("UBI: " fmt "\n", ##__VA_ARGS__)
  34
  35 /* Private own data */
  36 static struct ubi_device *ubi;
  37
  38 #ifdef CONFIG_CMD_UBIFS
  39 #include <ubifs_uboot.h>
  40 #endif
  41
  42 static void display_volume_info(struct ubi_device *ubi)
  43 {
  44         int i;
  45
  46         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  47                 if (!ubi->volumes[i])
  48                         continue;       /* Empty record */
  49                 ubi_dump_vol_info(ubi->volumes[i]);
  50         }
  51 }
  52
  53 static void display_ubi_info(struct ubi_device *ubi)
  54 {
  55         ubi_msg("MTD device name:            \"%s\"", ubi->mtd->name);
  56         ubi_msg("MTD device size:            %llu MiB", ubi->flash_size >> 20);
  57         ubi_msg("physical eraseblock size:   %d bytes (%d KiB)",
  58                         ubi->peb_size, ubi->peb_size >> 10);
  59         ubi_msg("logical eraseblock size:    %d bytes", ubi->leb_size);
  60         ubi_msg("number of good PEBs:        %d", ubi->good_peb_count);
  61         ubi_msg("number of bad PEBs:         %d", ubi->bad_peb_count);
  62         ubi_msg("smallest flash I/O unit:    %d", ubi->min_io_size);
  63         ubi_msg("VID header offset:          %d (aligned %d)",
  64                         ubi->vid_hdr_offset, ubi->vid_hdr_aloffset);
  65         ubi_msg("data offset:                %d", ubi->leb_start);
  66         ubi_msg("max. allowed volumes:       %d", ubi->vtbl_slots);
  67         ubi_msg("wear-leveling threshold:    %d", CONFIG_MTD_UBI_WL_THRESHOLD);
  68         ubi_msg("number of internal volumes: %d", UBI_INT_VOL_COUNT);
  69         ubi_msg("number of user volumes:     %d",
  70                         ubi->vol_count - UBI_INT_VOL_COUNT);
  71         ubi_msg("available PEBs:             %d", ubi->avail_pebs);
  72         ubi_msg("total number of reserved PEBs: %d", ubi->rsvd_pebs);
  73         ubi_msg("number of PEBs reserved for bad PEB handling: %d",
  74                         ubi->beb_rsvd_pebs);
  75         ubi_msg("max/mean erase counter: %d/%d", ubi->max_ec, ubi->mean_ec);
  76 }
  77
  78 static int ubi_info(int layout)
  79 {
  80         if (layout)
  81                 display_volume_info(ubi);
  82         else
  83                 display_ubi_info(ubi);
  84
  85         return 0;
  86 }
  87
  88 static int ubi_list(const char *var, int numeric)
  89 {
  90         size_t namelen, len, size;
  91         char *str, *str2;
  92         int i;
  93
  94         if (!var) {
  95                 for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  96                         if (!ubi->volumes[i])
  97                                 continue;
  98                         if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
  99                                 continue;
 100                         printf("%d: %s\n",
 101                                ubi->volumes[i]->vol_id,
 102                                ubi->volumes[i]->name);
 103                 }
 104                 return 0;
 105         }
 106
 107         len = 0;
 108         size = 16;
 109         str = malloc(size);
 110         if (!str)
 111                 return 1;
 112
 113         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
 114                 if (!ubi->volumes[i])
 115                         continue;
 116                 if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
 117                         continue;
 118
 119                 if (numeric)
 120                         namelen = 10; /* strlen(stringify(INT_MAX)) */
 121                 else
 122                         namelen = strlen(ubi->volumes[i]->name);
 123
 124                 if (len + namelen + 1 > size) {
 125                         size = roundup_pow_of_two(len + namelen + 1) * 2;
 126                         str2 = realloc(str, size);
 127                         if (!str2) {
 128                                 free(str);
 129                                 return 1;
 130                         }
 131                         str = str2;
 132                 }
 133
 134                 if (len)
 135                         str[len++] = ' ';
 136
 137                 if (numeric) {
 138                         len += sprintf(str + len, "%d", ubi->volumes[i]->vol_id) + 1;
 139                 } else {
 140                         memcpy(str + len, ubi->volumes[i]->name, namelen);
 141                         len += namelen;
 142                         str[len] = 0;
 143                 }
 144         }
 145
 146         env_set(var, str);
 147         free(str);
 148
 149         return 0;
 150 }
 151
 152 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
 153 {
 154         return strcmp(vol->name, name);
 155 }
 156
 157 static int ubi_check(char *name)
 158 {
 159         int i;
 160
 161         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
 162                 if (!ubi->volumes[i])
 163                         continue;       /* Empty record */
 164
 165                 if (!ubi_check_volumename(ubi->volumes[i], name))
 166                         return 0;
 167         }
 168
 169         return 1;
 170 }
 171
 172 static int verify_mkvol_req(const struct ubi_device *ubi,
 173                             const struct ubi_mkvol_req *req)
 174 {
 175         int n, err = EINVAL;
 176
 177         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
 178             req->name_len < 0)
 179                 goto bad;
 180
 181         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
 182             req->vol_id != UBI_VOL_NUM_AUTO)
 183                 goto bad;
 184
 185         if (req->alignment == 0)
 186                 goto bad;
 187
 188         if (req->bytes == 0) {
 189                 printf("No space left in UBI device!\n");
 190                 err = ENOMEM;
 191                 goto bad;
 192         }
 193
 194         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
 195             req->vol_type != UBI_STATIC_VOLUME)
 196                 goto bad;
 197
 198         if (req->alignment > ubi->leb_size)
 199                 goto bad;
 200
 201         n = req->alignment % ubi->min_io_size;
 202         if (req->alignment != 1 && n)
 203                 goto bad;
 204
 205         if (req->name_len > UBI_VOL_NAME_MAX) {
 206                 printf("Name too long!\n");
 207                 err = ENAMETOOLONG;
 208                 goto bad;
 209         }
 210
 211         return 0;
 212 bad:
 213         return err;
 214 }
 215
 216 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id,
 217                           bool skipcheck)
 218 {
 219         struct ubi_mkvol_req req;
 220         int err;
 221
 222         if (dynamic)
 223                 req.vol_type = UBI_DYNAMIC_VOLUME;
 224         else
 225                 req.vol_type = UBI_STATIC_VOLUME;
 226
 227         req.vol_id = vol_id;
 228         req.alignment = 1;
 229         req.bytes = size;
 230
 231         strcpy(req.name, volume);
 232         req.name_len = strlen(volume);
 233         req.name[req.name_len] = '\0';
 234         req.flags = 0;
 235         if (skipcheck)
 236                 req.flags |= UBI_VOL_SKIP_CRC_CHECK_FLG;
 237
 238         /* It's duplicated at drivers/mtd/ubi/cdev.c */
 239         err = verify_mkvol_req(ubi, &req);
 240         if (err) {
 241                 printf("verify_mkvol_req failed %d\n", err);
 242                 return err;
 243         }
 244         printf("Creating %s volume %s of size %lld\n",
 245                 dynamic ? "dynamic" : "static", volume, size);
 246         /* Call real ubi create volume */
 247         return ubi_create_volume(ubi, &req);
 248 }
 249
 250 static struct ubi_volume *ubi_find_volume(char *volume)
 251 {
 252         struct ubi_volume *vol;
 253         int i;
 254
 255         for (i = 0; i < ubi->vtbl_slots; i++) {
 256                 vol = ubi->volumes[i];
 257                 if (vol && !strcmp(vol->name, volume))
 258                         return vol;
 259         }
 260
 261         printf("Volume %s not found!\n", volume);
 262         return NULL;
 263 }
 264
 265 static int ubi_remove_vol(char *volume)
 266 {
 267         int err, reserved_pebs, i;
 268         struct ubi_volume *vol;
 269
 270         vol = ubi_find_volume(volume);
 271         if (vol == NULL)
 272                 return ENODEV;
 273
 274         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
 275
 276         if (ubi->ro_mode) {
 277                 printf("It's read-only mode\n");
 278                 err = EROFS;
 279                 goto out_err;
 280         }
 281
 282         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
 283         if (err) {
 284                 printf("Error changing Vol tabel record err=%x\n", err);
 285                 goto out_err;
 286         }
 287         reserved_pebs = vol->reserved_pebs;
 288         for (i = 0; i < vol->reserved_pebs; i++) {
 289                 err = ubi_eba_unmap_leb(ubi, vol, i);
 290                 if (err)
 291                         goto out_err;
 292         }
 293
 294         kfree(vol->eba_tbl);
 295         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
 296         ubi->volumes[vol->vol_id] = NULL;
 297
 298         ubi->rsvd_pebs -= reserved_pebs;
 299         ubi->avail_pebs += reserved_pebs;
 300         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
 301         if (i > 0) {
 302                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
 303                 ubi->avail_pebs -= i;
 304                 ubi->rsvd_pebs += i;
 305                 ubi->beb_rsvd_pebs += i;
 306                 if (i > 0)
 307                         ubi_msg("reserve more %d PEBs", i);
 308         }
 309         ubi->vol_count -= 1;
 310
 311         return 0;
 312 out_err:
 313         ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
 314         if (err < 0)
 315                 err = -err;
 316         return err;
 317 }
 318
 319 static int ubi_rename_vol(char *oldname, char *newname)
 320 {
 321         struct ubi_volume *vol;
 322         struct ubi_rename_entry rename;
 323         struct ubi_volume_desc desc;
 324         struct list_head list;
 325
 326         vol = ubi_find_volume(oldname);
 327         if (!vol) {
 328                 printf("%s: volume %s doesn't exist\n", __func__, oldname);
 329                 return ENODEV;
 330         }
 331
 332         if (!ubi_check(newname)) {
 333                 printf("%s: volume %s already exist\n", __func__, newname);
 334                 return EINVAL;
 335         }
 336
 337         printf("Rename UBI volume %s to %s\n", oldname, newname);
 338
 339         if (ubi->ro_mode) {
 340                 printf("%s: ubi device is in read-only mode\n", __func__);
 341                 return EROFS;
 342         }
 343
 344         rename.new_name_len = strlen(newname);
 345         strcpy(rename.new_name, newname);
 346         rename.remove = 0;
 347         desc.vol = vol;
 348         desc.mode = 0;
 349         rename.desc = &desc;
 350         INIT_LIST_HEAD(&rename.list);
 351         INIT_LIST_HEAD(&list);
 352         list_add(&rename.list, &list);
 353
 354         return ubi_rename_volumes(ubi, &list);
 355 }
 356
 357 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 358 {
 359         int err;
 360         struct ubi_volume *vol;
 361
 362         vol = ubi_find_volume(volume);
 363         if (vol == NULL)
 364                 return ENODEV;
 365
 366         if (!vol->updating) {
 367                 printf("UBI volume update was not initiated\n");
 368                 return EINVAL;
 369         }
 370
 371         err = ubi_more_update_data(ubi, vol, buf, size);
 372         if (err < 0) {
 373                 printf("Couldnt or partially wrote data\n");
 374                 return -err;
 375         }
 376
 377         if (err) {
 378                 size = err;
 379
 380                 err = ubi_check_volume(ubi, vol->vol_id);
 381                 if (err < 0)
 382                         return -err;
 383
 384                 if (err) {
 385                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
 386                                  vol->vol_id, ubi->ubi_num);
 387                         vol->corrupted = 1;
 388                 }
 389
 390                 vol->checked = 1;
 391                 ubi_gluebi_updated(vol);
 392         }
 393
 394         return 0;
 395 }
 396
 397 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 398         size_t full_size)
 399 {
 400         int err;
 401         int rsvd_bytes;
 402         struct ubi_volume *vol;
 403
 404         vol = ubi_find_volume(volume);
 405         if (vol == NULL)
 406                 return ENODEV;
 407
 408         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 409         if (size > rsvd_bytes) {
 410                 printf("size > volume size! Aborting!\n");
 411                 return EINVAL;
 412         }
 413
 414         err = ubi_start_update(ubi, vol, full_size);
 415         if (err < 0) {
 416                 printf("Cannot start volume update\n");
 417                 return -err;
 418         }
 419
 420         /* The volume is just wiped out */
 421         if (!full_size)
 422                 return 0;
 423
 424         return ubi_volume_continue_write(volume, buf, size);
 425 }
 426
 427 static int ubi_volume_offset_write(char *volume, void *buf, loff_t offset,
 428                                    size_t size)
 429 {
 430         int len, tbuf_size, ret;
 431         u64 lnum;
 432         struct ubi_volume *vol;
 433         loff_t off = offset;
 434         void *tbuf;
 435
 436         vol = ubi_find_volume(volume);
 437         if (!vol)
 438                 return -ENODEV;
 439
 440         if (size > vol->reserved_pebs * (ubi->leb_size - vol->data_pad))
 441                 return -EINVAL;
 442
 443         tbuf_size = vol->usable_leb_size;
 444         tbuf = malloc_cache_aligned(tbuf_size);
 445         if (!tbuf)
 446                 return -ENOMEM;
 447
 448         lnum = off;
 449         off = do_div(lnum, vol->usable_leb_size);
 450
 451         do {
 452                 struct ubi_volume_desc desc = {
 453                         .vol = vol,
 454                         .mode = UBI_READWRITE,
 455                 };
 456
 457                 len = size > tbuf_size ? tbuf_size : size;
 458                 if (off + len >= vol->usable_leb_size)
 459                         len = vol->usable_leb_size - off;
 460
 461                 ret = ubi_read(&desc, (int)lnum, tbuf, 0, tbuf_size);
 462                 if (ret) {
 463                         pr_err("Failed to read leb %lld (%d)\n", lnum, ret);
 464                         goto exit;
 465                 }
 466
 467                 memcpy(tbuf + off, buf, len);
 468
 469                 ret = ubi_leb_change(&desc, (int)lnum, tbuf, tbuf_size);
 470                 if (ret) {
 471                         pr_err("Failed to write leb %lld (%d)\n", lnum, ret);
 472                         goto exit;
 473                 }
 474
 475                 off += len;
 476                 if (off >= vol->usable_leb_size) {
 477                         lnum++;
 478                         off -= vol->usable_leb_size;
 479                 }
 480
 481                 buf += len;
 482                 size -= len;
 483         } while (size);
 484
 485 exit:
 486         free(tbuf);
 487         return ret;
 488 }
 489
 490 int ubi_volume_write(char *volume, void *buf, loff_t offset, size_t size)
 491 {
 492         int ret;
 493
 494         led_activity_blink();
 495
 496         if (!offset)
 497                 ret = ubi_volume_begin_write(volume, buf, size, size);
 498         else
 499                 ret = ubi_volume_offset_write(volume, buf, offset, size);
 500
 501         led_activity_off();
 502
 503         return ret;
 504 }
 505
 506 int ubi_volume_read(char *volume, char *buf, loff_t offset, size_t size)
 507 {
 508         int err, lnum, off, len, tbuf_size;
 509         void *tbuf;
 510         unsigned long long tmp;
 511         struct ubi_volume *vol;
 512         loff_t offp = offset;
 513         size_t len_read;
 514
 515         vol = ubi_find_volume(volume);
 516         if (vol == NULL)
 517                 return ENODEV;
 518
 519         if (vol->updating) {
 520                 printf("updating");
 521                 return EBUSY;
 522         }
 523         if (vol->upd_marker) {
 524                 printf("damaged volume, update marker is set");
 525                 return EBADF;
 526         }
 527         if (offp == vol->used_bytes)
 528                 return 0;
 529
 530         if (size == 0) {
 531                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 532                 size = vol->used_bytes;
 533         }
 534
 535         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
 536
 537         if (vol->corrupted)
 538                 printf("read from corrupted volume %d", vol->vol_id);
 539         if (offp + size > vol->used_bytes)
 540                 size = vol->used_bytes - offp;
 541
 542         tbuf_size = vol->usable_leb_size;
 543         if (size < tbuf_size)
 544                 tbuf_size = ALIGN(size, ubi->min_io_size);
 545         tbuf = malloc_cache_aligned(tbuf_size);
 546         if (!tbuf) {
 547                 printf("NO MEM\n");
 548                 return ENOMEM;
 549         }
 550         len = size > tbuf_size ? tbuf_size : size;
 551
 552         tmp = offp;
 553         off = do_div(tmp, vol->usable_leb_size);
 554         lnum = tmp;
 555         len_read = size;
 556         do {
 557                 if (off + len >= vol->usable_leb_size)
 558                         len = vol->usable_leb_size - off;
 559
 560                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 561                 if (err) {
 562                         printf("read err %x\n", err);
 563                         err = -err;
 564                         break;
 565                 }
 566                 off += len;
 567                 if (off == vol->usable_leb_size) {
 568                         lnum += 1;
 569                         off -= vol->usable_leb_size;
 570                 }
 571
 572                 size -= len;
 573                 offp += len;
 574
 575                 memcpy(buf, tbuf, len);
 576
 577                 buf += len;
 578                 len = size > tbuf_size ? tbuf_size : size;
 579         } while (size);
 580
 581         if (!size)
 582                 env_set_hex("filesize", len_read);
 583
 584         free(tbuf);
 585         return err;
 586 }
 587
 588 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
 589 {
 590         char ubi_mtd_param_buffer[80];
 591         int err;
 592
 593         if (!vid_header_offset)
 594                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
 595         else
 596                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
 597                         vid_header_offset);
 598
 599         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 600         if (err)
 601                 return -err;
 602
 603         err = ubi_init();
 604         if (err)
 605                 return -err;
 606
 607         return 0;
 608 }
 609
 610 static int ubi_set_skip_check(char *volume, bool skip_check)
 611 {
 612         struct ubi_vtbl_record vtbl_rec;
 613         struct ubi_volume *vol;
 614
 615         vol = ubi_find_volume(volume);
 616         if (!vol)
 617                 return ENODEV;
 618
 619         printf("%sing skip_check on volume %s\n",
 620                skip_check ? "Sett" : "Clear", volume);
 621
 622         vtbl_rec = ubi->vtbl[vol->vol_id];
 623         if (skip_check) {
 624                 vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG;
 625                 vol->skip_check = 1;
 626         } else {
 627                 vtbl_rec.flags &= ~UBI_VTBL_SKIP_CRC_CHECK_FLG;
 628                 vol->skip_check = 0;
 629         }
 630
 631         return ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
 632 }
 633
 634 static int ubi_detach(void)
 635 {
 636 #ifdef CONFIG_CMD_UBIFS
 637         /*
 638          * Automatically unmount UBIFS partition when user
 639          * changes the UBI device. Otherwise the following
 640          * UBIFS commands will crash.
 641          */
 642         if (ubifs_is_mounted())
 643                 cmd_ubifs_umount();
 644 #endif
 645
 646         /*
 647          * Call ubi_exit() before re-initializing the UBI subsystem
 648          */
 649         if (ubi)
 650                 ubi_exit();
 651
 652         ubi = NULL;
 653
 654         return 0;
 655 }
 656
 657 int ubi_part(char *part_name, const char *vid_header_offset)
 658 {
 659         struct mtd_info *mtd;
 660         int err;
 661
 662         if (ubi && ubi->mtd && !strcmp(ubi->mtd->name, part_name)) {
 663                 printf("UBI partition '%s' already selected\n", part_name);
 664                 return 0;
 665         }
 666
 667         ubi_detach();
 668
 669         mtd_probe_devices();
 670         mtd = get_mtd_device_nm(part_name);
 671         if (IS_ERR(mtd)) {
 672                 printf("Partition %s not found!\n", part_name);
 673                 return 1;
 674         }
 675         put_mtd_device(mtd);
 676
 677         err = ubi_dev_scan(mtd, vid_header_offset);
 678         if (err) {
 679                 printf("UBI init error %d\n", err);
 680                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
 681                 return err;
 682         }
 683
 684         ubi = ubi_devices[0];
 685
 686         return 0;
 687 }
 688
 689 static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 690 {
 691         int64_t size;
 692         ulong addr = 0;
 693         bool skipcheck = false;
 694
 695         if (argc < 2)
 696                 return CMD_RET_USAGE;
 697
 698         if (strcmp(argv[1], "detach") == 0)
 699                 return ubi_detach();
 700
 701         if (strcmp(argv[1], "part") == 0) {
 702                 const char *vid_header_offset = NULL;
 703
 704                 /* Print current partition */
 705                 if (argc == 2) {
 706                         if (!ubi) {
 707                                 printf("Error, no UBI device selected!\n");
 708                                 return 1;
 709                         }
 710
 711                         printf("Device %d: %s, MTD partition %s\n",
 712                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
 713                         return 0;
 714                 }
 715
 716                 if (argc < 3)
 717                         return CMD_RET_USAGE;
 718
 719                 if (argc > 3)
 720                         vid_header_offset = argv[3];
 721
 722                 return ubi_part(argv[2], vid_header_offset);
 723         }
 724
 725         if ((strcmp(argv[1], "part") != 0) && !ubi) {
 726                 printf("Error, no UBI device selected!\n");
 727                 return 1;
 728         }
 729
 730         if (strcmp(argv[1], "info") == 0) {
 731                 int layout = 0;
 732                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 733                         layout = 1;
 734                 return ubi_info(layout);
 735         }
 736
 737         if (strcmp(argv[1], "list") == 0) {
 738                 int numeric = 0;
 739                 if (argc >= 3 && argv[2][0] == '-') {
 740                         if (strcmp(argv[2], "-numeric") == 0)
 741                                 numeric = 1;
 742                         else
 743                                 return CMD_RET_USAGE;
 744                 }
 745                 if (!numeric && argc != 2 && argc != 3)
 746                         return CMD_RET_USAGE;
 747                 if (numeric && argc != 3 && argc != 4)
 748                         return CMD_RET_USAGE;
 749                 return ubi_list(argv[numeric ? 3 : 2], numeric);
 750         }
 751
 752         if (strcmp(argv[1], "check") == 0) {
 753                 if (argc > 2)
 754                         return ubi_check(argv[2]);
 755
 756                 printf("Error, no volume name passed\n");
 757                 return 1;
 758         }
 759
 760         if (strncmp(argv[1], "create", 6) == 0) {
 761                 int dynamic = 1;        /* default: dynamic volume */
 762                 int id = UBI_VOL_NUM_AUTO;
 763
 764                 /* Use maximum available size */
 765                 size = 0;
 766
 767                 /* E.g., create volume with "skipcheck" bit set */
 768                 if (argc == 7) {
 769                         skipcheck = strncmp(argv[6], "--skipcheck", 11) == 0;
 770                         argc--;
 771                 }
 772
 773                 /* E.g., create volume size type vol_id */
 774                 if (argc == 6) {
 775                         id = simple_strtoull(argv[5], NULL, 16);
 776                         argc--;
 777                 }
 778
 779                 /* E.g., create volume size type */
 780                 if (argc == 5) {
 781                         if (strncmp(argv[4], "s", 1) == 0)
 782                                 dynamic = 0;
 783                         else if (strncmp(argv[4], "d", 1) != 0) {
 784                                 printf("Incorrect type\n");
 785                                 return 1;
 786                         }
 787                         argc--;
 788                 }
 789                 /* E.g., create volume size */
 790                 if (argc == 4) {
 791                         if (argv[3][0] != '-')
 792                                 size = simple_strtoull(argv[3], NULL, 16);
 793                         argc--;
 794                 }
 795                 /* Use maximum available size */
 796                 if (!size) {
 797                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 798                         printf("No size specified -> Using max size (%lld)\n", size);
 799                 }
 800                 /* E.g., create volume */
 801                 if (argc == 3) {
 802                         return ubi_create_vol(argv[2], size, dynamic, id,
 803                                               skipcheck);
 804                 }
 805         }
 806
 807         if (strncmp(argv[1], "remove", 6) == 0) {
 808                 /* E.g., remove volume */
 809                 if (argc == 3)
 810                         return ubi_remove_vol(argv[2]);
 811         }
 812
 813         if (IS_ENABLED(CONFIG_CMD_UBI_RENAME) && !strncmp(argv[1], "rename", 6))
 814                 return ubi_rename_vol(argv[2], argv[3]);
 815
 816         if (strncmp(argv[1], "skipcheck", 9) == 0) {
 817                 /* E.g., change skip_check flag */
 818                 if (argc == 4) {
 819                         skipcheck = strncmp(argv[3], "on", 2) == 0;
 820                         return ubi_set_skip_check(argv[2], skipcheck);
 821                 }
 822         }
 823
 824         if (strncmp(argv[1], "write", 5) == 0) {
 825                 int ret;
 826
 827                 if (argc < 5) {
 828                         printf("Please see usage\n");
 829                         return 1;
 830                 }
 831
 832                 addr = hextoul(argv[2], NULL);
 833                 size = hextoul(argv[4], NULL);
 834
 835                 if (strlen(argv[1]) == 10 &&
 836                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 837                         if (argc < 6) {
 838                                 ret = ubi_volume_continue_write(argv[3],
 839                                                 (void *)addr, size);
 840                         } else {
 841                                 size_t full_size;
 842                                 full_size = hextoul(argv[5], NULL);
 843                                 ret = ubi_volume_begin_write(argv[3],
 844                                                 (void *)addr, size, full_size);
 845                         }
 846                 } else {
 847                         ret = ubi_volume_write(argv[3], (void *)addr, 0, size);
 848                 }
 849                 if (!ret) {
 850                         printf("%lld bytes written to volume %s\n", size,
 851                                argv[3]);
 852                 }
 853
 854                 return ret;
 855         }
 856
 857         if (strncmp(argv[1], "read", 4) == 0) {
 858                 size = 0;
 859
 860                 /* E.g., read volume size */
 861                 if (argc == 5) {
 862                         size = hextoul(argv[4], NULL);
 863                         argc--;
 864                 }
 865
 866                 /* E.g., read volume */
 867                 if (argc == 4) {
 868                         addr = hextoul(argv[2], NULL);
 869                         argc--;
 870                 }
 871
 872                 if (argc == 3) {
 873                         return ubi_volume_read(argv[3], (char *)addr, 0, size);
 874                 }
 875         }
 876
 877         printf("Please see usage\n");
 878         return 1;
 879 }
 880
 881 U_BOOT_CMD(
 882         ubi, 7, 1, do_ubi,
 883         "ubi commands",
 884         "detach"
 885                 " - detach ubi from a mtd partition\n"
 886         "ubi part [part] [offset]\n"
 887                 " - Show or set current partition (with optional VID"
 888                 " header offset)\n"
 889         "ubi info [l[ayout]]"
 890                 " - Display volume and ubi layout information\n"
 891         "ubi list [flags]"
 892                 " - print the list of volumes\n"
 893         "ubi list [flags] <varname>"
 894                 " - set environment variable to the list of volumes"
 895                 " (flags can be -numeric)\n"
 896         "ubi check volumename"
 897                 " - check if volumename exists\n"
 898         "ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"
 899                 " - create volume name with size ('-' for maximum"
 900                 " available size)\n"
 901         "ubi write[vol] address volume size"
 902                 " - Write volume from address with size\n"
 903         "ubi write.part address volume size [fullsize]\n"
 904                 " - Write part of a volume from address\n"
 905         "ubi read[vol] address volume [size]"
 906                 " - Read volume to address with size\n"
 907         "ubi remove[vol] volume"
 908                 " - Remove volume\n"
 909 #if IS_ENABLED(CONFIG_CMD_UBI_RENAME)
 910         "ubi rename oldname newname\n"
 911 #endif
 912         "ubi skipcheck volume on/off - Set or clear skip_check flag in volume header\n"
 913         "[Legends]\n"
 914         " volume: character name\n"
 915         " size: specified in bytes\n"
 916         " type: s[tatic] or d[ynamic] (default=dynamic)"
 917 );