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 <command.h>
  15 #include <env.h>
  16 #include <exports.h>
  17 #include <malloc.h>
  18 #include <memalign.h>
  19 #include <mtd.h>
  20 #include <nand.h>
  21 #include <onenand_uboot.h>
  22 #include <dm/devres.h>
  23 #include <linux/mtd/mtd.h>
  24 #include <linux/mtd/partitions.h>
  25 #include <linux/err.h>
  26 #include <ubi_uboot.h>
  27 #include <linux/errno.h>
  28 #include <jffs2/load_kernel.h>
  29 #include <linux/log2.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_list(const char *var, int numeric)
  88 {
  89         size_t namelen, len, size;
  90         char *str, *str2;
  91         int i;
  92
  93         if (!var) {
  94                 for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
  95                         if (!ubi->volumes[i])
  96                                 continue;
  97                         if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
  98                                 continue;
  99                         printf("%d: %s\n",
 100                                ubi->volumes[i]->vol_id,
 101                                ubi->volumes[i]->name);
 102                 }
 103                 return 0;
 104         }
 105
 106         len = 0;
 107         size = 16;
 108         str = malloc(size);
 109         if (!str)
 110                 return 1;
 111
 112         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
 113                 if (!ubi->volumes[i])
 114                         continue;
 115                 if (ubi->volumes[i]->vol_id >= UBI_INTERNAL_VOL_START)
 116                         continue;
 117
 118                 if (numeric)
 119                         namelen = 10; /* strlen(stringify(INT_MAX)) */
 120                 else
 121                         namelen = strlen(ubi->volumes[i]->name);
 122
 123                 if (len + namelen + 1 > size) {
 124                         size = roundup_pow_of_two(len + namelen + 1) * 2;
 125                         str2 = realloc(str, size);
 126                         if (!str2) {
 127                                 free(str);
 128                                 return 1;
 129                         }
 130                         str = str2;
 131                 }
 132
 133                 if (len)
 134                         str[len++] = ' ';
 135
 136                 if (numeric) {
 137                         len += sprintf(str + len, "%d", ubi->volumes[i]->vol_id) + 1;
 138                 } else {
 139                         memcpy(str + len, ubi->volumes[i]->name, namelen);
 140                         len += namelen;
 141                         str[len] = 0;
 142                 }
 143         }
 144
 145         env_set(var, str);
 146         free(str);
 147
 148         return 0;
 149 }
 150
 151 static int ubi_check_volumename(const struct ubi_volume *vol, char *name)
 152 {
 153         return strcmp(vol->name, name);
 154 }
 155
 156 static int ubi_check(char *name)
 157 {
 158         int i;
 159
 160         for (i = 0; i < (ubi->vtbl_slots + 1); i++) {
 161                 if (!ubi->volumes[i])
 162                         continue;       /* Empty record */
 163
 164                 if (!ubi_check_volumename(ubi->volumes[i], name))
 165                         return 0;
 166         }
 167
 168         return 1;
 169 }
 170
 171 static int verify_mkvol_req(const struct ubi_device *ubi,
 172                             const struct ubi_mkvol_req *req)
 173 {
 174         int n, err = EINVAL;
 175
 176         if (req->bytes < 0 || req->alignment < 0 || req->vol_type < 0 ||
 177             req->name_len < 0)
 178                 goto bad;
 179
 180         if ((req->vol_id < 0 || req->vol_id >= ubi->vtbl_slots) &&
 181             req->vol_id != UBI_VOL_NUM_AUTO)
 182                 goto bad;
 183
 184         if (req->alignment == 0)
 185                 goto bad;
 186
 187         if (req->bytes == 0) {
 188                 printf("No space left in UBI device!\n");
 189                 err = ENOMEM;
 190                 goto bad;
 191         }
 192
 193         if (req->vol_type != UBI_DYNAMIC_VOLUME &&
 194             req->vol_type != UBI_STATIC_VOLUME)
 195                 goto bad;
 196
 197         if (req->alignment > ubi->leb_size)
 198                 goto bad;
 199
 200         n = req->alignment % ubi->min_io_size;
 201         if (req->alignment != 1 && n)
 202                 goto bad;
 203
 204         if (req->name_len > UBI_VOL_NAME_MAX) {
 205                 printf("Name too long!\n");
 206                 err = ENAMETOOLONG;
 207                 goto bad;
 208         }
 209
 210         return 0;
 211 bad:
 212         return err;
 213 }
 214
 215 static int ubi_create_vol(char *volume, int64_t size, int dynamic, int vol_id,
 216                           bool skipcheck)
 217 {
 218         struct ubi_mkvol_req req;
 219         int err;
 220
 221         if (dynamic)
 222                 req.vol_type = UBI_DYNAMIC_VOLUME;
 223         else
 224                 req.vol_type = UBI_STATIC_VOLUME;
 225
 226         req.vol_id = vol_id;
 227         req.alignment = 1;
 228         req.bytes = size;
 229
 230         strcpy(req.name, volume);
 231         req.name_len = strlen(volume);
 232         req.name[req.name_len] = '\0';
 233         req.flags = 0;
 234         if (skipcheck)
 235                 req.flags |= UBI_VOL_SKIP_CRC_CHECK_FLG;
 236
 237         /* It's duplicated at drivers/mtd/ubi/cdev.c */
 238         err = verify_mkvol_req(ubi, &req);
 239         if (err) {
 240                 printf("verify_mkvol_req failed %d\n", err);
 241                 return err;
 242         }
 243         printf("Creating %s volume %s of size %lld\n",
 244                 dynamic ? "dynamic" : "static", volume, size);
 245         /* Call real ubi create volume */
 246         return ubi_create_volume(ubi, &req);
 247 }
 248
 249 static struct ubi_volume *ubi_find_volume(char *volume)
 250 {
 251         struct ubi_volume *vol;
 252         int i;
 253
 254         for (i = 0; i < ubi->vtbl_slots; i++) {
 255                 vol = ubi->volumes[i];
 256                 if (vol && !strcmp(vol->name, volume))
 257                         return vol;
 258         }
 259
 260         printf("Volume %s not found!\n", volume);
 261         return NULL;
 262 }
 263
 264 static int ubi_remove_vol(char *volume)
 265 {
 266         int err, reserved_pebs, i;
 267         struct ubi_volume *vol;
 268
 269         vol = ubi_find_volume(volume);
 270         if (vol == NULL)
 271                 return ENODEV;
 272
 273         printf("Remove UBI volume %s (id %d)\n", vol->name, vol->vol_id);
 274
 275         if (ubi->ro_mode) {
 276                 printf("It's read-only mode\n");
 277                 err = EROFS;
 278                 goto out_err;
 279         }
 280
 281         err = ubi_change_vtbl_record(ubi, vol->vol_id, NULL);
 282         if (err) {
 283                 printf("Error changing Vol tabel record err=%x\n", err);
 284                 goto out_err;
 285         }
 286         reserved_pebs = vol->reserved_pebs;
 287         for (i = 0; i < vol->reserved_pebs; i++) {
 288                 err = ubi_eba_unmap_leb(ubi, vol, i);
 289                 if (err)
 290                         goto out_err;
 291         }
 292
 293         kfree(vol->eba_tbl);
 294         ubi->volumes[vol->vol_id]->eba_tbl = NULL;
 295         ubi->volumes[vol->vol_id] = NULL;
 296
 297         ubi->rsvd_pebs -= reserved_pebs;
 298         ubi->avail_pebs += reserved_pebs;
 299         i = ubi->beb_rsvd_level - ubi->beb_rsvd_pebs;
 300         if (i > 0) {
 301                 i = ubi->avail_pebs >= i ? i : ubi->avail_pebs;
 302                 ubi->avail_pebs -= i;
 303                 ubi->rsvd_pebs += i;
 304                 ubi->beb_rsvd_pebs += i;
 305                 if (i > 0)
 306                         ubi_msg("reserve more %d PEBs", i);
 307         }
 308         ubi->vol_count -= 1;
 309
 310         return 0;
 311 out_err:
 312         ubi_err(ubi, "cannot remove volume %s, error %d", volume, err);
 313         if (err < 0)
 314                 err = -err;
 315         return err;
 316 }
 317
 318 static int ubi_rename_vol(char *oldname, char *newname)
 319 {
 320         struct ubi_volume *vol;
 321         struct ubi_rename_entry rename;
 322         struct ubi_volume_desc desc;
 323         struct list_head list;
 324
 325         vol = ubi_find_volume(oldname);
 326         if (!vol) {
 327                 printf("%s: volume %s doesn't exist\n", __func__, oldname);
 328                 return ENODEV;
 329         }
 330
 331         if (!ubi_check(newname)) {
 332                 printf("%s: volume %s already exist\n", __func__, newname);
 333                 return EINVAL;
 334         }
 335
 336         printf("Rename UBI volume %s to %s\n", oldname, newname);
 337
 338         if (ubi->ro_mode) {
 339                 printf("%s: ubi device is in read-only mode\n", __func__);
 340                 return EROFS;
 341         }
 342
 343         rename.new_name_len = strlen(newname);
 344         strcpy(rename.new_name, newname);
 345         rename.remove = 0;
 346         desc.vol = vol;
 347         desc.mode = 0;
 348         rename.desc = &desc;
 349         INIT_LIST_HEAD(&rename.list);
 350         INIT_LIST_HEAD(&list);
 351         list_add(&rename.list, &list);
 352
 353         return ubi_rename_volumes(ubi, &list);
 354 }
 355
 356 static int ubi_volume_continue_write(char *volume, void *buf, size_t size)
 357 {
 358         int err;
 359         struct ubi_volume *vol;
 360
 361         vol = ubi_find_volume(volume);
 362         if (vol == NULL)
 363                 return ENODEV;
 364
 365         if (!vol->updating) {
 366                 printf("UBI volume update was not initiated\n");
 367                 return EINVAL;
 368         }
 369
 370         err = ubi_more_update_data(ubi, vol, buf, size);
 371         if (err < 0) {
 372                 printf("Couldnt or partially wrote data\n");
 373                 return -err;
 374         }
 375
 376         if (err) {
 377                 size = err;
 378
 379                 err = ubi_check_volume(ubi, vol->vol_id);
 380                 if (err < 0)
 381                         return -err;
 382
 383                 if (err) {
 384                         ubi_warn(ubi, "volume %d on UBI device %d is corrupt",
 385                                  vol->vol_id, ubi->ubi_num);
 386                         vol->corrupted = 1;
 387                 }
 388
 389                 vol->checked = 1;
 390                 ubi_gluebi_updated(vol);
 391         }
 392
 393         return 0;
 394 }
 395
 396 int ubi_volume_begin_write(char *volume, void *buf, size_t size,
 397         size_t full_size)
 398 {
 399         int err;
 400         int rsvd_bytes;
 401         struct ubi_volume *vol;
 402
 403         vol = ubi_find_volume(volume);
 404         if (vol == NULL)
 405                 return ENODEV;
 406
 407         rsvd_bytes = vol->reserved_pebs * (ubi->leb_size - vol->data_pad);
 408         if (size > rsvd_bytes) {
 409                 printf("size > volume size! Aborting!\n");
 410                 return EINVAL;
 411         }
 412
 413         err = ubi_start_update(ubi, vol, full_size);
 414         if (err < 0) {
 415                 printf("Cannot start volume update\n");
 416                 return -err;
 417         }
 418
 419         /* The volume is just wiped out */
 420         if (!full_size)
 421                 return 0;
 422
 423         return ubi_volume_continue_write(volume, buf, size);
 424 }
 425
 426 int ubi_volume_write(char *volume, void *buf, size_t size)
 427 {
 428         return ubi_volume_begin_write(volume, buf, size, size);
 429 }
 430
 431 int ubi_volume_read(char *volume, char *buf, size_t size)
 432 {
 433         int err, lnum, off, len, tbuf_size;
 434         void *tbuf;
 435         unsigned long long tmp;
 436         struct ubi_volume *vol;
 437         loff_t offp = 0;
 438         size_t len_read;
 439
 440         vol = ubi_find_volume(volume);
 441         if (vol == NULL)
 442                 return ENODEV;
 443
 444         if (vol->updating) {
 445                 printf("updating");
 446                 return EBUSY;
 447         }
 448         if (vol->upd_marker) {
 449                 printf("damaged volume, update marker is set");
 450                 return EBADF;
 451         }
 452         if (offp == vol->used_bytes)
 453                 return 0;
 454
 455         if (size == 0) {
 456                 printf("No size specified -> Using max size (%lld)\n", vol->used_bytes);
 457                 size = vol->used_bytes;
 458         }
 459
 460         printf("Read %zu bytes from volume %s to %p\n", size, volume, buf);
 461
 462         if (vol->corrupted)
 463                 printf("read from corrupted volume %d", vol->vol_id);
 464         if (offp + size > vol->used_bytes)
 465                 size = vol->used_bytes - offp;
 466
 467         tbuf_size = vol->usable_leb_size;
 468         if (size < tbuf_size)
 469                 tbuf_size = ALIGN(size, ubi->min_io_size);
 470         tbuf = malloc_cache_aligned(tbuf_size);
 471         if (!tbuf) {
 472                 printf("NO MEM\n");
 473                 return ENOMEM;
 474         }
 475         len = size > tbuf_size ? tbuf_size : size;
 476
 477         tmp = offp;
 478         off = do_div(tmp, vol->usable_leb_size);
 479         lnum = tmp;
 480         len_read = size;
 481         do {
 482                 if (off + len >= vol->usable_leb_size)
 483                         len = vol->usable_leb_size - off;
 484
 485                 err = ubi_eba_read_leb(ubi, vol, lnum, tbuf, off, len, 0);
 486                 if (err) {
 487                         printf("read err %x\n", err);
 488                         err = -err;
 489                         break;
 490                 }
 491                 off += len;
 492                 if (off == vol->usable_leb_size) {
 493                         lnum += 1;
 494                         off -= vol->usable_leb_size;
 495                 }
 496
 497                 size -= len;
 498                 offp += len;
 499
 500                 memcpy(buf, tbuf, len);
 501
 502                 buf += len;
 503                 len = size > tbuf_size ? tbuf_size : size;
 504         } while (size);
 505
 506         if (!size)
 507                 env_set_hex("filesize", len_read);
 508
 509         free(tbuf);
 510         return err;
 511 }
 512
 513 static int ubi_dev_scan(struct mtd_info *info, const char *vid_header_offset)
 514 {
 515         char ubi_mtd_param_buffer[80];
 516         int err;
 517
 518         if (!vid_header_offset)
 519                 sprintf(ubi_mtd_param_buffer, "%s", info->name);
 520         else
 521                 sprintf(ubi_mtd_param_buffer, "%s,%s", info->name,
 522                         vid_header_offset);
 523
 524         err = ubi_mtd_param_parse(ubi_mtd_param_buffer, NULL);
 525         if (err)
 526                 return -err;
 527
 528         err = ubi_init();
 529         if (err)
 530                 return -err;
 531
 532         return 0;
 533 }
 534
 535 static int ubi_set_skip_check(char *volume, bool skip_check)
 536 {
 537         struct ubi_vtbl_record vtbl_rec;
 538         struct ubi_volume *vol;
 539
 540         vol = ubi_find_volume(volume);
 541         if (!vol)
 542                 return ENODEV;
 543
 544         printf("%sing skip_check on volume %s\n",
 545                skip_check ? "Sett" : "Clear", volume);
 546
 547         vtbl_rec = ubi->vtbl[vol->vol_id];
 548         if (skip_check) {
 549                 vtbl_rec.flags |= UBI_VTBL_SKIP_CRC_CHECK_FLG;
 550                 vol->skip_check = 1;
 551         } else {
 552                 vtbl_rec.flags &= ~UBI_VTBL_SKIP_CRC_CHECK_FLG;
 553                 vol->skip_check = 0;
 554         }
 555
 556         return ubi_change_vtbl_record(ubi, vol->vol_id, &vtbl_rec);
 557 }
 558
 559 static int ubi_detach(void)
 560 {
 561 #ifdef CONFIG_CMD_UBIFS
 562         /*
 563          * Automatically unmount UBIFS partition when user
 564          * changes the UBI device. Otherwise the following
 565          * UBIFS commands will crash.
 566          */
 567         if (ubifs_is_mounted())
 568                 cmd_ubifs_umount();
 569 #endif
 570
 571         /*
 572          * Call ubi_exit() before re-initializing the UBI subsystem
 573          */
 574         if (ubi)
 575                 ubi_exit();
 576
 577         ubi = NULL;
 578
 579         return 0;
 580 }
 581
 582 int ubi_part(char *part_name, const char *vid_header_offset)
 583 {
 584         struct mtd_info *mtd;
 585         int err;
 586
 587         if (ubi && ubi->mtd && !strcmp(ubi->mtd->name, part_name)) {
 588                 printf("UBI partition '%s' already selected\n", part_name);
 589                 return 0;
 590         }
 591
 592         ubi_detach();
 593
 594         mtd_probe_devices();
 595         mtd = get_mtd_device_nm(part_name);
 596         if (IS_ERR(mtd)) {
 597                 printf("Partition %s not found!\n", part_name);
 598                 return 1;
 599         }
 600         put_mtd_device(mtd);
 601
 602         err = ubi_dev_scan(mtd, vid_header_offset);
 603         if (err) {
 604                 printf("UBI init error %d\n", err);
 605                 printf("Please check, if the correct MTD partition is used (size big enough?)\n");
 606                 return err;
 607         }
 608
 609         ubi = ubi_devices[0];
 610
 611         return 0;
 612 }
 613
 614 static int do_ubi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 615 {
 616         int64_t size;
 617         ulong addr = 0;
 618         bool skipcheck = false;
 619
 620         if (argc < 2)
 621                 return CMD_RET_USAGE;
 622
 623         if (strcmp(argv[1], "detach") == 0)
 624                 return ubi_detach();
 625
 626         if (strcmp(argv[1], "part") == 0) {
 627                 const char *vid_header_offset = NULL;
 628
 629                 /* Print current partition */
 630                 if (argc == 2) {
 631                         if (!ubi) {
 632                                 printf("Error, no UBI device selected!\n");
 633                                 return 1;
 634                         }
 635
 636                         printf("Device %d: %s, MTD partition %s\n",
 637                                ubi->ubi_num, ubi->ubi_name, ubi->mtd->name);
 638                         return 0;
 639                 }
 640
 641                 if (argc < 3)
 642                         return CMD_RET_USAGE;
 643
 644                 if (argc > 3)
 645                         vid_header_offset = argv[3];
 646
 647                 return ubi_part(argv[2], vid_header_offset);
 648         }
 649
 650         if ((strcmp(argv[1], "part") != 0) && !ubi) {
 651                 printf("Error, no UBI device selected!\n");
 652                 return 1;
 653         }
 654
 655         if (strcmp(argv[1], "info") == 0) {
 656                 int layout = 0;
 657                 if (argc > 2 && !strncmp(argv[2], "l", 1))
 658                         layout = 1;
 659                 return ubi_info(layout);
 660         }
 661
 662         if (strcmp(argv[1], "list") == 0) {
 663                 int numeric = 0;
 664                 if (argc >= 3 && argv[2][0] == '-') {
 665                         if (strcmp(argv[2], "-numeric") == 0)
 666                                 numeric = 1;
 667                         else
 668                                 return CMD_RET_USAGE;
 669                 }
 670                 if (!numeric && argc != 2 && argc != 3)
 671                         return CMD_RET_USAGE;
 672                 if (numeric && argc != 3 && argc != 4)
 673                         return CMD_RET_USAGE;
 674                 return ubi_list(argv[numeric ? 3 : 2], numeric);
 675         }
 676
 677         if (strcmp(argv[1], "check") == 0) {
 678                 if (argc > 2)
 679                         return ubi_check(argv[2]);
 680
 681                 printf("Error, no volume name passed\n");
 682                 return 1;
 683         }
 684
 685         if (strncmp(argv[1], "create", 6) == 0) {
 686                 int dynamic = 1;        /* default: dynamic volume */
 687                 int id = UBI_VOL_NUM_AUTO;
 688
 689                 /* Use maximum available size */
 690                 size = 0;
 691
 692                 /* E.g., create volume with "skipcheck" bit set */
 693                 if (argc == 7) {
 694                         skipcheck = strncmp(argv[6], "--skipcheck", 11) == 0;
 695                         argc--;
 696                 }
 697
 698                 /* E.g., create volume size type vol_id */
 699                 if (argc == 6) {
 700                         id = simple_strtoull(argv[5], NULL, 16);
 701                         argc--;
 702                 }
 703
 704                 /* E.g., create volume size type */
 705                 if (argc == 5) {
 706                         if (strncmp(argv[4], "s", 1) == 0)
 707                                 dynamic = 0;
 708                         else if (strncmp(argv[4], "d", 1) != 0) {
 709                                 printf("Incorrect type\n");
 710                                 return 1;
 711                         }
 712                         argc--;
 713                 }
 714                 /* E.g., create volume size */
 715                 if (argc == 4) {
 716                         if (argv[3][0] != '-')
 717                                 size = simple_strtoull(argv[3], NULL, 16);
 718                         argc--;
 719                 }
 720                 /* Use maximum available size */
 721                 if (!size) {
 722                         size = (int64_t)ubi->avail_pebs * ubi->leb_size;
 723                         printf("No size specified -> Using max size (%lld)\n", size);
 724                 }
 725                 /* E.g., create volume */
 726                 if (argc == 3) {
 727                         return ubi_create_vol(argv[2], size, dynamic, id,
 728                                               skipcheck);
 729                 }
 730         }
 731
 732         if (strncmp(argv[1], "remove", 6) == 0) {
 733                 /* E.g., remove volume */
 734                 if (argc == 3)
 735                         return ubi_remove_vol(argv[2]);
 736         }
 737
 738         if (IS_ENABLED(CONFIG_CMD_UBI_RENAME) && !strncmp(argv[1], "rename", 6))
 739                 return ubi_rename_vol(argv[2], argv[3]);
 740
 741         if (strncmp(argv[1], "skipcheck", 9) == 0) {
 742                 /* E.g., change skip_check flag */
 743                 if (argc == 4) {
 744                         skipcheck = strncmp(argv[3], "on", 2) == 0;
 745                         return ubi_set_skip_check(argv[2], skipcheck);
 746                 }
 747         }
 748
 749         if (strncmp(argv[1], "write", 5) == 0) {
 750                 int ret;
 751
 752                 if (argc < 5) {
 753                         printf("Please see usage\n");
 754                         return 1;
 755                 }
 756
 757                 addr = hextoul(argv[2], NULL);
 758                 size = hextoul(argv[4], NULL);
 759
 760                 if (strlen(argv[1]) == 10 &&
 761                     strncmp(argv[1] + 5, ".part", 5) == 0) {
 762                         if (argc < 6) {
 763                                 ret = ubi_volume_continue_write(argv[3],
 764                                                 (void *)addr, size);
 765                         } else {
 766                                 size_t full_size;
 767                                 full_size = hextoul(argv[5], NULL);
 768                                 ret = ubi_volume_begin_write(argv[3],
 769                                                 (void *)addr, size, full_size);
 770                         }
 771                 } else {
 772                         ret = ubi_volume_write(argv[3], (void *)addr, size);
 773                 }
 774                 if (!ret) {
 775                         printf("%lld bytes written to volume %s\n", size,
 776                                argv[3]);
 777                 }
 778
 779                 return ret;
 780         }
 781
 782         if (strncmp(argv[1], "read", 4) == 0) {
 783                 size = 0;
 784
 785                 /* E.g., read volume size */
 786                 if (argc == 5) {
 787                         size = hextoul(argv[4], NULL);
 788                         argc--;
 789                 }
 790
 791                 /* E.g., read volume */
 792                 if (argc == 4) {
 793                         addr = hextoul(argv[2], NULL);
 794                         argc--;
 795                 }
 796
 797                 if (argc == 3) {
 798                         return ubi_volume_read(argv[3], (char *)addr, size);
 799                 }
 800         }
 801
 802         printf("Please see usage\n");
 803         return 1;
 804 }
 805
 806 U_BOOT_CMD(
 807         ubi, 7, 1, do_ubi,
 808         "ubi commands",
 809         "detach"
 810                 " - detach ubi from a mtd partition\n"
 811         "ubi part [part] [offset]\n"
 812                 " - Show or set current partition (with optional VID"
 813                 " header offset)\n"
 814         "ubi info [l[ayout]]"
 815                 " - Display volume and ubi layout information\n"
 816         "ubi list [flags]"
 817                 " - print the list of volumes\n"
 818         "ubi list [flags] <varname>"
 819                 " - set environment variable to the list of volumes"
 820                 " (flags can be -numeric)\n"
 821         "ubi check volumename"
 822                 " - check if volumename exists\n"
 823         "ubi create[vol] volume [size] [type] [id] [--skipcheck]\n"
 824                 " - create volume name with size ('-' for maximum"
 825                 " available size)\n"
 826         "ubi write[vol] address volume size"
 827                 " - Write volume from address with size\n"
 828         "ubi write.part address volume size [fullsize]\n"
 829                 " - Write part of a volume from address\n"
 830         "ubi read[vol] address volume [size]"
 831                 " - Read volume to address with size\n"
 832         "ubi remove[vol] volume"
 833                 " - Remove volume\n"
 834 #if IS_ENABLED(CONFIG_CMD_UBI_RENAME)
 835         "ubi rename oldname newname\n"
 836 #endif
 837         "ubi skipcheck volume on/off - Set or clear skip_check flag in volume header\n"
 838         "[Legends]\n"
 839         " volume: character name\n"
 840         " size: specified in bytes\n"
 841         " type: s[tatic] or d[ynamic] (default=dynamic)"
 842 );