cmd/ubi.c

   1 /*
   2  * Unsorted Block Image commands
   3  *
   4  *  Copyright (C) 2008 Samsung Electronics
   5  *  Kyungmin Park <[email protected]>
   6  *
   7  * Copyright 2008-2009 Stefan Roese <[email protected]>, 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 #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 = NULL;
 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 = 1;
 360         struct ubi_volume *vol;
 361
 362         vol = ubi_find_volume(volume);
 363         if (vol == NULL)
 364                 return ENODEV;
 365
 366         err = ubi_more_update_data(ubi, vol, buf, size);
 367         if (err < 0) {
 368                 printf("Couldnt or partially wrote data\n");
 369                 return -err;
 370         }
 371
 372         if (err) {
 373                 size = err;
 374
 375                 err = ubi_check_volume(ubi, vol->vol_id);
 376                 if (err < 0)
 377                         return -err;
 378
 379                 if (err) {
 380                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
 381                                  vol->vol_id, ubi->ubi_num);
 382                         vol->corrupted = 1;
 383                 }
 384
 385                 vol->checked = 1;
 386                 ubi_gluebi_updated(vol);
 387         }
 388
 389         return 0;
 390 }
 391
 392 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 393         size_t full_size)
 394 {
 395         int err = 1;
 396         int rsvd_bytes = 0;
 397         struct ubi_volume *vol;
 398
 399         vol = ubi_find_volume(volume);
 400         if (vol == NULL)
 401                 return ENODEV;
 402
 403         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 404         if (size > rsvd_bytes) {
 405                 printf("size > volume size! Aborting!\n");
 406                 return EINVAL;
 407         }
 408
 409         err = ubi_start_update(ubi, vol, full_size);
 410         if (err < 0) {
 411                 printf("Cannot start volume update\n");
 412                 return -err;
 413         }
 414
 415         return ubi_volume_continue_write(volume, buf, size);
 416 }
 417
 418 int ubi_volume_write(char *volume, void *buf, size_t size)
 419 {
 420         return ubi_volume_begin_write(volume, buf, size, size);
 421 }
 422
 423 int ubi_volume_read(char *volume, char *buf, size_t size)
 424 {
 425         int err, lnum, off, len, tbuf_size;
 426         void *tbuf;
 427         unsigned long long tmp;
 428         struct ubi_volume *vol;
 429         loff_t offp = 0;
 430         size_t len_read;
 431
 432         vol = ubi_find_volume(volume);
 433         if (vol == NULL)
 434                 return ENODEV;
 435
 436         if (vol->updating) {
 437                 printf("updating");
 438                 return EBUSY;
 439         }
 440         if (vol->upd_marker) {
 441                 printf("damaged volume, update marker is set");
 442                 return EBADF;
 443         }
 444         if (offp == vol->used_bytes)
 445                 return 0;
 446
 447         if (size == 0) {
 448                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 449                 size = vol->used_bytes;
 450         }
 451
 452         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
 453
 454         if (vol->corrupted)
 455                 printf("read from corrupted volume %d", vol->vol_id);
 456         if (offp + size > vol->used_bytes)
 457                 size = vol->used_bytes - offp;
 458
 459         tbuf_size = vol->usable_leb_size;
 460         if (size < tbuf_size)
 461                 tbuf_size = ALIGN(size, ubi->min_io_size);
 462         tbuf = malloc_cache_aligned(tbuf_size);
 463         if (!tbuf) {
 464                 printf("NO MEM\n");
 465                 return ENOMEM;
 466         }
 467         len = size > tbuf_size ? tbuf_size : size;
 468
 469         tmp = offp;
 470         off = do_div(tmp, vol->usable_leb_size);
 471         lnum = tmp;
 472         len_read = size;
 473         do {
 474                 if (off + len >= vol->usable_leb_size)
 475                         len = vol->usable_leb_size - off;
 476
 477                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 478                 if (err) {
 479                         printf("read err %x\n", err);
 480                         err = -err;
 481                         break;
 482                 }
 483                 off += len;
 484                 if (off == vol->usable_leb_size) {
 485                         lnum += 1;
 486                         off -= vol->usable_leb_size;
 487                 }
 488
 489                 size -= len;
 490                 offp += len;
 491
 492                 memcpy(buf, tbuf, len);
 493
 494                 buf += len;
 495                 len = size > tbuf_size ? tbuf_size : size;
 496         } while (size);
 497
 498         if (!size)
 499                 env_set_hex("filesize", len_read);
 500
 501         free(tbuf);
 502         return err;
 503 }
 504
 505 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
 506 {
 507         char ubi_mtd_param_buffer[80];
 508         int err;
 509
 510         if (!vid_header_offset)
 511                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
 512         else
 513                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
 514                         vid_header_offset);
 515
 516         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 517         if (err)
 518                 return -err;
 519
 520         err = ubi_init();
 521         if (err)
 522                 return -err;
 523
 524         return 0;
 525 }
 526
 527 static int ubi_set_skip_check(char *volume, bool skip_check)
 528 {
 529         struct ubi_vtbl_record vtbl_rec;
 530         struct ubi_volume *vol;
 531
 532         vol = ubi_find_volume(volume);
 533         if (!vol)
 534                 return ENODEV;
 535
 536         printf("%sing skip_check on volume %s\n",
 537                skip_check ? "Sett" : "Clear", volume);
 538
 539         vtbl_rec = ubi->vtbl[vol->vol_id];
 540         if (skip_check) {
 541                 vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG;
 542                 vol->skip_check = 1;
 543         } else {
 544                 vtbl_rec.flags &= ~UBI_VTBL_SKIP_CRC_CHECK_FLG;
 545                 vol->skip_check = 0;
 546         }
 547
 548         return ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
 549 }
 550
 551 static int ubi_detach(void)
 552 {
 553 #ifdef CONFIG_CMD_UBIFS
 554         /*
 555          * Automatically unmount UBIFS partition when user
 556          * changes the UBI device. Otherwise the following
 557          * UBIFS commands will crash.
 558          */
 559         if (ubifs_is_mounted())
 560                 cmd_ubifs_umount();
 561 #endif
 562
 563         /*
 564          * Call ubi_exit() before re-initializing the UBI subsystem
 565          */
 566         if (ubi)
 567                 ubi_exit();
 568
 569         ubi = NULL;
 570
 571         return 0;
 572 }
 573
 574 int ubi_part(char *part_name, const char *vid_header_offset)
 575 {
 576         struct mtd_info *mtd;
 577         int err = 0;
 578
 579         if (ubi && ubi->mtd && !strcmp(ubi->mtd->name, part_name)) {
 580                 printf("UBI partition '%s' already selected\n", part_name);
 581                 return 0;
 582         }
 583
 584         ubi_detach();
 585
 586         mtd_probe_devices();
 587         mtd = get_mtd_device_nm(part_name);
 588         if (IS_ERR(mtd)) {
 589                 printf("Partition %s not found!\n", part_name);
 590                 return 1;
 591         }
 592         put_mtd_device(mtd);
 593
 594         err = ubi_dev_scan(mtd, vid_header_offset);
 595         if (err) {
 596                 printf("UBI init error %d\n", err);
 597                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
 598                 return err;
 599         }
 600
 601         ubi = ubi_devices[0];
 602
 603         return 0;
 604 }
 605
 606 static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 607 {
 608         int64_t size = 0;
 609         ulong addr = 0;
 610         bool skipcheck = false;
 611
 612         if (argc < 2)
 613                 return CMD_RET_USAGE;
 614
 615         if (strcmp(argv[1], "detach") == 0)
 616                 return ubi_detach();
 617
 618         if (strcmp(argv[1], "part") == 0) {
 619                 const char *vid_header_offset = NULL;
 620
 621                 /* Print current partition */
 622                 if (argc == 2) {
 623                         if (!ubi) {
 624                                 printf("Error, no UBI device selected!\n");
 625                                 return 1;
 626                         }
 627
 628                         printf("Device %d: %s, MTD partition %s\n",
 629                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
 630                         return 0;
 631                 }
 632
 633                 if (argc < 3)
 634                         return CMD_RET_USAGE;
 635
 636                 if (argc > 3)
 637                         vid_header_offset = argv[3];
 638
 639                 return ubi_part(argv[2], vid_header_offset);
 640         }
 641
 642         if ((strcmp(argv[1], "part") != 0) && !ubi) {
 643                 printf("Error, no UBI device selected!\n");
 644                 return 1;
 645         }
 646
 647         if (strcmp(argv[1], "info") == 0) {
 648                 int layout = 0;
 649                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 650                         layout = 1;
 651                 return ubi_info(layout);
 652         }
 653
 654         if (strcmp(argv[1], "list") == 0) {
 655                 int numeric = 0;
 656                 if (argc >= 3 && argv[2][0] == '-') {
 657                         if (strcmp(argv[2], "-numeric") == 0)
 658                                 numeric = 1;
 659                         else
 660                                 return CMD_RET_USAGE;
 661                 }
 662                 if (!numeric && argc != 2 && argc != 3)
 663                         return CMD_RET_USAGE;
 664                 if (numeric && argc != 3 && argc != 4)
 665                         return CMD_RET_USAGE;
 666                 return ubi_list(argv[numeric ? 3 : 2], numeric);
 667         }
 668
 669         if (strcmp(argv[1], "check") == 0) {
 670                 if (argc > 2)
 671                         return ubi_check(argv[2]);
 672
 673                 printf("Error, no volume name passed\n");
 674                 return 1;
 675         }
 676
 677         if (strncmp(argv[1], "create", 6) == 0) {
 678                 int dynamic = 1;        /* default: dynamic volume */
 679                 int id = UBI_VOL_NUM_AUTO;
 680
 681                 /* Use maximum available size */
 682                 size = 0;
 683
 684                 /* E.g., create volume with "skipcheck" bit set */
 685                 if (argc == 7) {
 686                         skipcheck = strncmp(argv[6], "--skipcheck", 11) == 0;
 687                         argc--;
 688                 }
 689
 690                 /* E.g., create volume size type vol_id */
 691                 if (argc == 6) {
 692                         id = simple_strtoull(argv[5], NULL, 16);
 693                         argc--;
 694                 }
 695
 696                 /* E.g., create volume size type */
 697                 if (argc == 5) {
 698                         if (strncmp(argv[4], "s", 1) == 0)
 699                                 dynamic = 0;
 700                         else if (strncmp(argv[4], "d", 1) != 0) {
 701                                 printf("Incorrect type\n");
 702                                 return 1;
 703                         }
 704                         argc--;
 705                 }
 706                 /* E.g., create volume size */
 707                 if (argc == 4) {
 708                         if (argv[3][0] != '-')
 709                                 size = simple_strtoull(argv[3], NULL, 16);
 710                         argc--;
 711                 }
 712                 /* Use maximum available size */
 713                 if (!size) {
 714                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 715                         printf("No size specified -> Using max size (%lld)\n", size);
 716                 }
 717                 /* E.g., create volume */
 718                 if (argc == 3) {
 719                         return ubi_create_vol(argv[2], size, dynamic, id,
 720                                               skipcheck);
 721                 }
 722         }
 723
 724         if (strncmp(argv[1], "remove", 6) == 0) {
 725                 /* E.g., remove volume */
 726                 if (argc == 3)
 727                         return ubi_remove_vol(argv[2]);
 728         }
 729
 730         if (IS_ENABLED(CONFIG_CMD_UBI_RENAME) && !strncmp(argv[1], "rename", 6))
 731                 return ubi_rename_vol(argv[2], argv[3]);
 732
 733         if (strncmp(argv[1], "skipcheck", 9) == 0) {
 734                 /* E.g., change skip_check flag */
 735                 if (argc == 4) {
 736                         skipcheck = strncmp(argv[3], "on", 2) == 0;
 737                         return ubi_set_skip_check(argv[2], skipcheck);
 738                 }
 739         }
 740
 741         if (strncmp(argv[1], "write", 5) == 0) {
 742                 int ret;
 743
 744                 if (argc < 5) {
 745                         printf("Please see usage\n");
 746                         return 1;
 747                 }
 748
 749                 addr = hextoul(argv[2], NULL);
 750                 size = hextoul(argv[4], NULL);
 751
 752                 if (strlen(argv[1]) == 10 &&
 753                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 754                         if (argc < 6) {
 755                                 ret = ubi_volume_continue_write(argv[3],
 756                                                 (void *)addr, size);
 757                         } else {
 758                                 size_t full_size;
 759                                 full_size = hextoul(argv[5], NULL);
 760                                 ret = ubi_volume_begin_write(argv[3],
 761                                                 (void *)addr, size, full_size);
 762                         }
 763                 } else {
 764                         ret = ubi_volume_write(argv[3], (void *)addr, size);
 765                 }
 766                 if (!ret) {
 767                         printf("%lld bytes written to volume %s\n", size,
 768                                argv[3]);
 769                 }
 770
 771                 return ret;
 772         }
 773
 774         if (strncmp(argv[1], "read", 4) == 0) {
 775                 size = 0;
 776
 777                 /* E.g., read volume size */
 778                 if (argc == 5) {
 779                         size = hextoul(argv[4], NULL);
 780                         argc--;
 781                 }
 782
 783                 /* E.g., read volume */
 784                 if (argc == 4) {
 785                         addr = hextoul(argv[2], NULL);
 786                         argc--;
 787                 }
 788
 789                 if (argc == 3) {
 790                         return ubi_volume_read(argv[3], (char *)addr, size);
 791                 }
 792         }
 793
 794         printf("Please see usage\n");
 795         return 1;
 796 }
 797
 798 U_BOOT_CMD(
 799         ubi, 7, 1, do_ubi,
 800         "ubi commands",
 801         "detach"
 802                 " - detach ubi from a mtd partition\n"
 803         "ubi part [part] [offset]\n"
 804                 " - Show or set current partition (with optional VID"
 805                 " header offset)\n"
 806         "ubi info [l[ayout]]"
 807                 " - Display volume and ubi layout information\n"
 808         "ubi list [flags]"
 809                 " - print the list of volumes\n"
 810         "ubi list [flags] <varname>"
 811                 " - set environment variable to the list of volumes"
 812                 " (flags can be -numeric)\n"
 813         "ubi check volumename"
 814                 " - check if volumename exists\n"
 815         "ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"
 816                 " - create volume name with size ('-' for maximum"
 817                 " available size)\n"
 818         "ubi write[vol] address volume size"
 819                 " - Write volume from address with size\n"
 820         "ubi write.part address volume size [fullsize]\n"
 821                 " - Write part of a volume from address\n"
 822         "ubi read[vol] address volume [size]"
 823                 " - Read volume to address with size\n"
 824         "ubi remove[vol] volume"
 825                 " - Remove volume\n"
 826 #if IS_ENABLED(CONFIG_CMD_UBI_RENAME)
 827         "ubi rename oldname newname\n"
 828 #endif
 829         "ubi skipcheck volume on/off - Set or clear skip_check flag in volume header\n"
 830         "[Legends]\n"
 831         " volume: character name\n"
 832         " size: specified in bytes\n"
 833         " type: s[tatic] or d[ynamic] (default=dynamic)"
 834 );