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1 /*
2  * Driver for NAND support, Rick Bronson
3  * borrowed heavily from:
4  * (c) 1999 Machine Vision Holdings, Inc.
5  * (c) 1999, 2000 David Woodhouse <dwmw2@infradead.org>
6  *
7  * Ported 'dynenv' to 'nand env.oob' command
8  * (C) 2010 Nanometrics, Inc.
9  * 'dynenv' -- Dynamic environment offset in NAND OOB
10  * (C) Copyright 2006-2007 OpenMoko, Inc.
11  * Added 16-bit nand support
12  * (C) 2004 Texas Instruments
13  *
14  * Copyright 2010, 2012 Freescale Semiconductor
15  * The portions of this file whose copyright is held by Freescale and which
16  * are not considered a derived work of GPL v2-only code may be distributed
17  * and/or modified under the terms of the GNU General Public License as
18  * published by the Free Software Foundation; either version 2 of the
19  * License, or (at your option) any later version.
20  */
21
22 #include <common.h>
23 #include <linux/mtd/mtd.h>
24 #include <command.h>
25 #include <watchdog.h>
26 #include <malloc.h>
27 #include <asm/byteorder.h>
28 #include <jffs2/jffs2.h>
29 #include <nand.h>
30
31 #if defined(CONFIG_CMD_MTDPARTS)
32
33 /* partition handling routines */
34 int mtdparts_init(void);
35 int id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
36 int find_dev_and_part(const char *id, struct mtd_device **dev,
37                       u8 *part_num, struct part_info **part);
38 #endif
39
40 static int nand_dump(nand_info_t *nand, ulong off, int only_oob, int repeat)
41 {
42         int i;
43         u_char *datbuf, *oobbuf, *p;
44         static loff_t last;
45         int ret = 0;
46
47         if (repeat)
48                 off = last + nand->writesize;
49
50         last = off;
51
52         datbuf = memalign(ARCH_DMA_MINALIGN, nand->writesize);
53         if (!datbuf) {
54                 puts("No memory for page buffer\n");
55                 return 1;
56         }
57
58         oobbuf = memalign(ARCH_DMA_MINALIGN, nand->oobsize);
59         if (!oobbuf) {
60                 puts("No memory for page buffer\n");
61                 ret = 1;
62                 goto free_dat;
63         }
64         off &= ~(nand->writesize - 1);
65         loff_t addr = (loff_t) off;
66         struct mtd_oob_ops ops;
67         memset(&ops, 0, sizeof(ops));
68         ops.datbuf = datbuf;
69         ops.oobbuf = oobbuf;
70         ops.len = nand->writesize;
71         ops.ooblen = nand->oobsize;
72         ops.mode = MTD_OPS_RAW;
73         i = mtd_read_oob(nand, addr, &ops);
74         if (i < 0) {
75                 printf("Error (%d) reading page %08lx\n", i, off);
76                 ret = 1;
77                 goto free_all;
78         }
79         printf("Page %08lx dump:\n", off);
80
81         if (!only_oob) {
82                 i = nand->writesize >> 4;
83                 p = datbuf;
84
85                 while (i--) {
86                         printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
87                                "  %02x %02x %02x %02x %02x %02x %02x %02x\n",
88                                p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
89                                p[8], p[9], p[10], p[11], p[12], p[13], p[14],
90                                p[15]);
91                         p += 16;
92                 }
93         }
94
95         puts("OOB:\n");
96         i = nand->oobsize >> 3;
97         p = oobbuf;
98         while (i--) {
99                 printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
100                        p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
101                 p += 8;
102         }
103
104 free_all:
105         free(oobbuf);
106 free_dat:
107         free(datbuf);
108
109         return ret;
110 }
111
112 /* ------------------------------------------------------------------------- */
113
114 static int set_dev(int dev)
115 {
116         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE ||
117             !nand_info[dev].name) {
118                 puts("No such device\n");
119                 return -1;
120         }
121
122         if (nand_curr_device == dev)
123                 return 0;
124
125         printf("Device %d: %s", dev, nand_info[dev].name);
126         puts("... is now current device\n");
127         nand_curr_device = dev;
128
129 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
130         board_nand_select_device(nand_info[dev].priv, dev);
131 #endif
132
133         return 0;
134 }
135
136 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
137 static void print_status(ulong start, ulong end, ulong erasesize, int status)
138 {
139         /*
140          * Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
141          * not the same as others.  Instead of bit 1 being lock, it is
142          * #lock_tight. To make the driver support either format, ignore bit 1
143          * and use only bit 0 and bit 2.
144          */
145         printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
146                 start,
147                 end - 1,
148                 (end - start) / erasesize,
149                 ((status & NAND_LOCK_STATUS_TIGHT) ?  "TIGHT " : ""),
150                 (!(status & NAND_LOCK_STATUS_UNLOCK) ?  "LOCK " : ""),
151                 ((status & NAND_LOCK_STATUS_UNLOCK) ?  "UNLOCK " : ""));
152 }
153
154 static void do_nand_status(nand_info_t *nand)
155 {
156         ulong block_start = 0;
157         ulong off;
158         int last_status = -1;
159
160         struct nand_chip *nand_chip = nand->priv;
161         /* check the WP bit */
162         nand_chip->cmdfunc(nand, NAND_CMD_STATUS, -1, -1);
163         printf("device is %swrite protected\n",
164                 (nand_chip->read_byte(nand) & 0x80 ?
165                 "NOT " : ""));
166
167         for (off = 0; off < nand->size; off += nand->erasesize) {
168                 int s = nand_get_lock_status(nand, off);
169
170                 /* print message only if status has changed */
171                 if (s != last_status && off != 0) {
172                         print_status(block_start, off, nand->erasesize,
173                                         last_status);
174                         block_start = off;
175                 }
176                 last_status = s;
177         }
178         /* Print the last block info */
179         print_status(block_start, off, nand->erasesize, last_status);
180 }
181 #endif
182
183 #ifdef CONFIG_ENV_OFFSET_OOB
184 unsigned long nand_env_oob_offset;
185
186 int do_nand_env_oob(cmd_tbl_t *cmdtp, int argc, char *const argv[])
187 {
188         int ret;
189         uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
190         nand_info_t *nand = &nand_info[0];
191         char *cmd = argv[1];
192
193         if (CONFIG_SYS_MAX_NAND_DEVICE == 0 || !nand->name) {
194                 puts("no devices available\n");
195                 return 1;
196         }
197
198         set_dev(0);
199
200         if (!strcmp(cmd, "get")) {
201                 ret = get_nand_env_oob(nand, &nand_env_oob_offset);
202                 if (ret)
203                         return 1;
204
205                 printf("0x%08lx\n", nand_env_oob_offset);
206         } else if (!strcmp(cmd, "set")) {
207                 loff_t addr;
208                 loff_t maxsize;
209                 struct mtd_oob_ops ops;
210                 int idx = 0;
211
212                 if (argc < 3)
213                         goto usage;
214
215                 /* We don't care about size, or maxsize. */
216                 if (mtd_arg_off(argv[2], &idx, &addr, &maxsize, &maxsize,
217                                 MTD_DEV_TYPE_NAND, nand_info[idx].size)) {
218                         puts("Offset or partition name expected\n");
219                         return 1;
220                 }
221                 if (set_dev(idx)) {
222                         puts("Offset or partition name expected\n");
223                         return 1;
224                 }
225
226                 if (idx != 0) {
227                         puts("Partition not on first NAND device\n");
228                         return 1;
229                 }
230
231                 if (nand->oobavail < ENV_OFFSET_SIZE) {
232                         printf("Insufficient available OOB bytes:\n"
233                                "%d OOB bytes available but %d required for "
234                                "env.oob support\n",
235                                nand->oobavail, ENV_OFFSET_SIZE);
236                         return 1;
237                 }
238
239                 if ((addr & (nand->erasesize - 1)) != 0) {
240                         printf("Environment offset must be block-aligned\n");
241                         return 1;
242                 }
243
244                 ops.datbuf = NULL;
245                 ops.mode = MTD_OOB_AUTO;
246                 ops.ooboffs = 0;
247                 ops.ooblen = ENV_OFFSET_SIZE;
248                 ops.oobbuf = (void *) oob_buf;
249
250                 oob_buf[0] = ENV_OOB_MARKER;
251                 oob_buf[1] = addr / nand->erasesize;
252
253                 ret = nand->write_oob(nand, ENV_OFFSET_SIZE, &ops);
254                 if (ret) {
255                         printf("Error writing OOB block 0\n");
256                         return ret;
257                 }
258
259                 ret = get_nand_env_oob(nand, &nand_env_oob_offset);
260                 if (ret) {
261                         printf("Error reading env offset in OOB\n");
262                         return ret;
263                 }
264
265                 if (addr != nand_env_oob_offset) {
266                         printf("Verification of env offset in OOB failed: "
267                                "0x%08llx expected but got 0x%08lx\n",
268                                (unsigned long long)addr, nand_env_oob_offset);
269                         return 1;
270                 }
271         } else {
272                 goto usage;
273         }
274
275         return ret;
276
277 usage:
278         return CMD_RET_USAGE;
279 }
280
281 #endif
282
283 static void nand_print_and_set_info(int idx)
284 {
285         nand_info_t *nand = &nand_info[idx];
286         struct nand_chip *chip = nand->priv;
287
288         printf("Device %d: ", idx);
289         if (chip->numchips > 1)
290                 printf("%dx ", chip->numchips);
291         printf("%s, sector size %u KiB\n",
292                nand->name, nand->erasesize >> 10);
293         printf("  Page size   %8d b\n", nand->writesize);
294         printf("  OOB size    %8d b\n", nand->oobsize);
295         printf("  Erase size  %8d b\n", nand->erasesize);
296         printf("  subpagesize %8d b\n", chip->subpagesize);
297         printf("  options     0x%8x\n", chip->options);
298         printf("  bbt options 0x%8x\n", chip->bbt_options);
299
300         /* Set geometry info */
301         setenv_hex("nand_writesize", nand->writesize);
302         setenv_hex("nand_oobsize", nand->oobsize);
303         setenv_hex("nand_erasesize", nand->erasesize);
304 }
305
306 static int raw_access(nand_info_t *nand, ulong addr, loff_t off, ulong count,
307                         int read)
308 {
309         int ret = 0;
310
311         while (count--) {
312                 /* Raw access */
313                 mtd_oob_ops_t ops = {
314                         .datbuf = (u8 *)addr,
315                         .oobbuf = ((u8 *)addr) + nand->writesize,
316                         .len = nand->writesize,
317                         .ooblen = nand->oobsize,
318                         .mode = MTD_OPS_RAW
319                 };
320
321                 if (read) {
322                         ret = mtd_read_oob(nand, off, &ops);
323                 } else {
324                         ret = mtd_write_oob(nand, off, &ops);
325                         if (!ret)
326                                 ret = nand_verify_page_oob(nand, &ops, off);
327                 }
328
329                 if (ret) {
330                         printf("%s: error at offset %llx, ret %d\n",
331                                 __func__, (long long)off, ret);
332                         break;
333                 }
334
335                 addr += nand->writesize + nand->oobsize;
336                 off += nand->writesize;
337         }
338
339         return ret;
340 }
341
342 /* Adjust a chip/partition size down for bad blocks so we don't
343  * read/write past the end of a chip/partition by accident.
344  */
345 static void adjust_size_for_badblocks(loff_t *size, loff_t offset, int dev)
346 {
347         /* We grab the nand info object here fresh because this is usually
348          * called after arg_off_size() which can change the value of dev.
349          */
350         nand_info_t *nand = &nand_info[dev];
351         loff_t maxoffset = offset + *size;
352         int badblocks = 0;
353
354         /* count badblocks in NAND from offset to offset + size */
355         for (; offset < maxoffset; offset += nand->erasesize) {
356                 if (nand_block_isbad(nand, offset))
357                         badblocks++;
358         }
359         /* adjust size if any bad blocks found */
360         if (badblocks) {
361                 *size -= badblocks * nand->erasesize;
362                 printf("size adjusted to 0x%llx (%d bad blocks)\n",
363                        (unsigned long long)*size, badblocks);
364         }
365 }
366
367 static int do_nand(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
368 {
369         int i, ret = 0;
370         ulong addr;
371         loff_t off, size, maxsize;
372         char *cmd, *s;
373         nand_info_t *nand;
374 #ifdef CONFIG_SYS_NAND_QUIET
375         int quiet = CONFIG_SYS_NAND_QUIET;
376 #else
377         int quiet = 0;
378 #endif
379         const char *quiet_str = getenv("quiet");
380         int dev = nand_curr_device;
381         int repeat = flag & CMD_FLAG_REPEAT;
382
383         /* at least two arguments please */
384         if (argc < 2)
385                 goto usage;
386
387         if (quiet_str)
388                 quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
389
390         cmd = argv[1];
391
392         /* Only "dump" is repeatable. */
393         if (repeat && strcmp(cmd, "dump"))
394                 return 0;
395
396         if (strcmp(cmd, "info") == 0) {
397
398                 putc('\n');
399                 for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
400                         if (nand_info[i].name)
401                                 nand_print_and_set_info(i);
402                 }
403                 return 0;
404         }
405
406         if (strcmp(cmd, "device") == 0) {
407                 if (argc < 3) {
408                         putc('\n');
409                         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
410                                 puts("no devices available\n");
411                         else
412                                 nand_print_and_set_info(dev);
413                         return 0;
414                 }
415
416                 dev = (int)simple_strtoul(argv[2], NULL, 10);
417                 set_dev(dev);
418
419                 return 0;
420         }
421
422 #ifdef CONFIG_ENV_OFFSET_OOB
423         /* this command operates only on the first nand device */
424         if (strcmp(cmd, "env.oob") == 0)
425                 return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
426 #endif
427
428         /* The following commands operate on the current device, unless
429          * overridden by a partition specifier.  Note that if somehow the
430          * current device is invalid, it will have to be changed to a valid
431          * one before these commands can run, even if a partition specifier
432          * for another device is to be used.
433          */
434         if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE ||
435             !nand_info[dev].name) {
436                 puts("\nno devices available\n");
437                 return 1;
438         }
439         nand = &nand_info[dev];
440
441         if (strcmp(cmd, "bad") == 0) {
442                 printf("\nDevice %d bad blocks:\n", dev);
443                 for (off = 0; off < nand->size; off += nand->erasesize)
444                         if (nand_block_isbad(nand, off))
445                                 printf("  %08llx\n", (unsigned long long)off);
446                 return 0;
447         }
448
449         /*
450          * Syntax is:
451          *   0    1     2       3    4
452          *   nand erase [clean] [off size]
453          */
454         if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
455                 nand_erase_options_t opts;
456                 /* "clean" at index 2 means request to write cleanmarker */
457                 int clean = argc > 2 && !strcmp("clean", argv[2]);
458                 int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
459                 int o = (clean || scrub_yes) ? 3 : 2;
460                 int scrub = !strncmp(cmd, "scrub", 5);
461                 int spread = 0;
462                 int args = 2;
463                 const char *scrub_warn =
464                         "Warning: "
465                         "scrub option will erase all factory set bad blocks!\n"
466                         "         "
467                         "There is no reliable way to recover them.\n"
468                         "         "
469                         "Use this command only for testing purposes if you\n"
470                         "         "
471                         "are sure of what you are doing!\n"
472                         "\nReally scrub this NAND flash? <y/N>\n";
473
474                 if (cmd[5] != 0) {
475                         if (!strcmp(&cmd[5], ".spread")) {
476                                 spread = 1;
477                         } else if (!strcmp(&cmd[5], ".part")) {
478                                 args = 1;
479                         } else if (!strcmp(&cmd[5], ".chip")) {
480                                 args = 0;
481                         } else {
482                                 goto usage;
483                         }
484                 }
485
486                 /*
487                  * Don't allow missing arguments to cause full chip/partition
488                  * erases -- easy to do accidentally, e.g. with a misspelled
489                  * variable name.
490                  */
491                 if (argc != o + args)
492                         goto usage;
493
494                 printf("\nNAND %s: ", cmd);
495                 /* skip first two or three arguments, look for offset and size */
496                 if (mtd_arg_off_size(argc - o, argv + o, &dev, &off, &size,
497                                      &maxsize, MTD_DEV_TYPE_NAND,
498                                      nand_info[dev].size) != 0)
499                         return 1;
500
501                 if (set_dev(dev))
502                         return 1;
503
504                 nand = &nand_info[dev];
505
506                 memset(&opts, 0, sizeof(opts));
507                 opts.offset = off;
508                 opts.length = size;
509                 opts.jffs2  = clean;
510                 opts.quiet  = quiet;
511                 opts.spread = spread;
512
513                 if (scrub) {
514                         if (scrub_yes) {
515                                 opts.scrub = 1;
516                         } else {
517                                 puts(scrub_warn);
518                                 if (confirm_yesno()) {
519                                         opts.scrub = 1;
520                                 } else {
521                                         puts("scrub aborted\n");
522                                         return 1;
523                                 }
524                         }
525                 }
526                 ret = nand_erase_opts(nand, &opts);
527                 printf("%s\n", ret ? "ERROR" : "OK");
528
529                 return ret == 0 ? 0 : 1;
530         }
531
532         if (strncmp(cmd, "dump", 4) == 0) {
533                 if (argc < 3)
534                         goto usage;
535
536                 off = (int)simple_strtoul(argv[2], NULL, 16);
537                 ret = nand_dump(nand, off, !strcmp(&cmd[4], ".oob"), repeat);
538
539                 return ret == 0 ? 1 : 0;
540         }
541
542         if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
543                 size_t rwsize;
544                 ulong pagecount = 1;
545                 int read;
546                 int raw = 0;
547
548                 if (argc < 4)
549                         goto usage;
550
551                 addr = (ulong)simple_strtoul(argv[2], NULL, 16);
552
553                 read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
554                 printf("\nNAND %s: ", read ? "read" : "write");
555
556                 s = strchr(cmd, '.');
557
558                 if (s && !strcmp(s, ".raw")) {
559                         raw = 1;
560
561                         if (mtd_arg_off(argv[3], &dev, &off, &size, &maxsize,
562                                         MTD_DEV_TYPE_NAND,
563                                         nand_info[dev].size))
564                                 return 1;
565
566                         if (set_dev(dev))
567                                 return 1;
568
569                         nand = &nand_info[dev];
570
571                         if (argc > 4 && !str2long(argv[4], &pagecount)) {
572                                 printf("'%s' is not a number\n", argv[4]);
573                                 return 1;
574                         }
575
576                         if (pagecount * nand->writesize > size) {
577                                 puts("Size exceeds partition or device limit\n");
578                                 return -1;
579                         }
580
581                         rwsize = pagecount * (nand->writesize + nand->oobsize);
582                 } else {
583                         if (mtd_arg_off_size(argc - 3, argv + 3, &dev, &off,
584                                              &size, &maxsize,
585                                              MTD_DEV_TYPE_NAND,
586                                              nand_info[dev].size) != 0)
587                                 return 1;
588
589                         if (set_dev(dev))
590                                 return 1;
591
592                         /* size is unspecified */
593                         if (argc < 5)
594                                 adjust_size_for_badblocks(&size, off, dev);
595                         rwsize = size;
596                 }
597
598                 nand = &nand_info[dev];
599
600                 if (!s || !strcmp(s, ".jffs2") ||
601                     !strcmp(s, ".e") || !strcmp(s, ".i")) {
602                         if (read)
603                                 ret = nand_read_skip_bad(nand, off, &rwsize,
604                                                          NULL, maxsize,
605                                                          (u_char *)addr);
606                         else
607                                 ret = nand_write_skip_bad(nand, off, &rwsize,
608                                                           NULL, maxsize,
609                                                           (u_char *)addr,
610                                                           WITH_WR_VERIFY);
611 #ifdef CONFIG_CMD_NAND_TRIMFFS
612                 } else if (!strcmp(s, ".trimffs")) {
613                         if (read) {
614                                 printf("Unknown nand command suffix '%s'\n", s);
615                                 return 1;
616                         }
617                         ret = nand_write_skip_bad(nand, off, &rwsize, NULL,
618                                                 maxsize, (u_char *)addr,
619                                                 WITH_DROP_FFS | WITH_WR_VERIFY);
620 #endif
621                 } else if (!strcmp(s, ".oob")) {
622                         /* out-of-band data */
623                         mtd_oob_ops_t ops = {
624                                 .oobbuf = (u8 *)addr,
625                                 .ooblen = rwsize,
626                                 .mode = MTD_OPS_RAW
627                         };
628
629                         if (read)
630                                 ret = mtd_read_oob(nand, off, &ops);
631                         else
632                                 ret = mtd_write_oob(nand, off, &ops);
633                 } else if (raw) {
634                         ret = raw_access(nand, addr, off, pagecount, read);
635                 } else {
636                         printf("Unknown nand command suffix '%s'.\n", s);
637                         return 1;
638                 }
639
640                 printf(" %zu bytes %s: %s\n", rwsize,
641                        read ? "read" : "written", ret ? "ERROR" : "OK");
642
643                 return ret == 0 ? 0 : 1;
644         }
645
646 #ifdef CONFIG_CMD_NAND_TORTURE
647         if (strcmp(cmd, "torture") == 0) {
648                 if (argc < 3)
649                         goto usage;
650
651                 if (!str2off(argv[2], &off)) {
652                         puts("Offset is not a valid number\n");
653                         return 1;
654                 }
655
656                 printf("\nNAND torture: device %d offset 0x%llx size 0x%x\n",
657                         dev, off, nand->erasesize);
658                 ret = nand_torture(nand, off);
659                 printf(" %s\n", ret ? "Failed" : "Passed");
660
661                 return ret == 0 ? 0 : 1;
662         }
663 #endif
664
665         if (strcmp(cmd, "markbad") == 0) {
666                 argc -= 2;
667                 argv += 2;
668
669                 if (argc <= 0)
670                         goto usage;
671
672                 while (argc > 0) {
673                         addr = simple_strtoul(*argv, NULL, 16);
674
675                         if (mtd_block_markbad(nand, addr)) {
676                                 printf("block 0x%08lx NOT marked "
677                                         "as bad! ERROR %d\n",
678                                         addr, ret);
679                                 ret = 1;
680                         } else {
681                                 printf("block 0x%08lx successfully "
682                                         "marked as bad\n",
683                                         addr);
684                         }
685                         --argc;
686                         ++argv;
687                 }
688                 return ret;
689         }
690
691         if (strcmp(cmd, "biterr") == 0) {
692                 /* todo */
693                 return 1;
694         }
695
696 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
697         if (strcmp(cmd, "lock") == 0) {
698                 int tight = 0;
699                 int status = 0;
700                 if (argc == 3) {
701                         if (!strcmp("tight", argv[2]))
702                                 tight = 1;
703                         if (!strcmp("status", argv[2]))
704                                 status = 1;
705                 }
706                 if (status) {
707                         do_nand_status(nand);
708                 } else {
709                         if (!nand_lock(nand, tight)) {
710                                 puts("NAND flash successfully locked\n");
711                         } else {
712                                 puts("Error locking NAND flash\n");
713                                 return 1;
714                         }
715                 }
716                 return 0;
717         }
718
719         if (strncmp(cmd, "unlock", 5) == 0) {
720                 int allexcept = 0;
721
722                 s = strchr(cmd, '.');
723
724                 if (s && !strcmp(s, ".allexcept"))
725                         allexcept = 1;
726
727                 if (mtd_arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
728                                      &maxsize, MTD_DEV_TYPE_NAND,
729                                      nand_info[dev].size) < 0)
730                         return 1;
731
732                 if (set_dev(dev))
733                         return 1;
734
735                 if (!nand_unlock(&nand_info[dev], off, size, allexcept)) {
736                         puts("NAND flash successfully unlocked\n");
737                 } else {
738                         puts("Error unlocking NAND flash, "
739                              "write and erase will probably fail\n");
740                         return 1;
741                 }
742                 return 0;
743         }
744 #endif
745
746 usage:
747         return CMD_RET_USAGE;
748 }
749
750 #ifdef CONFIG_SYS_LONGHELP
751 static char nand_help_text[] =
752         "info - show available NAND devices\n"
753         "nand device [dev] - show or set current device\n"
754         "nand read - addr off|partition size\n"
755         "nand write - addr off|partition size\n"
756         "    read/write 'size' bytes starting at offset 'off'\n"
757         "    to/from memory address 'addr', skipping bad blocks.\n"
758         "nand read.raw - addr off|partition [count]\n"
759         "nand write.raw - addr off|partition [count]\n"
760         "    Use read.raw/write.raw to avoid ECC and access the flash as-is.\n"
761 #ifdef CONFIG_CMD_NAND_TRIMFFS
762         "nand write.trimffs - addr off|partition size\n"
763         "    write 'size' bytes starting at offset 'off' from memory address\n"
764         "    'addr', skipping bad blocks and dropping any pages at the end\n"
765         "    of eraseblocks that contain only 0xFF\n"
766 #endif
767         "nand erase[.spread] [clean] off size - erase 'size' bytes "
768         "from offset 'off'\n"
769         "    With '.spread', erase enough for given file size, otherwise,\n"
770         "    'size' includes skipped bad blocks.\n"
771         "nand erase.part [clean] partition - erase entire mtd partition'\n"
772         "nand erase.chip [clean] - erase entire chip'\n"
773         "nand bad - show bad blocks\n"
774         "nand dump[.oob] off - dump page\n"
775 #ifdef CONFIG_CMD_NAND_TORTURE
776         "nand torture off - torture block at offset\n"
777 #endif
778         "nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
779         "    really clean NAND erasing bad blocks (UNSAFE)\n"
780         "nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
781         "nand biterr off - make a bit error at offset (UNSAFE)"
782 #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
783         "\n"
784         "nand lock [tight] [status]\n"
785         "    bring nand to lock state or display locked pages\n"
786         "nand unlock[.allexcept] [offset] [size] - unlock section"
787 #endif
788 #ifdef CONFIG_ENV_OFFSET_OOB
789         "\n"
790         "nand env.oob - environment offset in OOB of block 0 of"
791         "    first device.\n"
792         "nand env.oob set off|partition - set enviromnent offset\n"
793         "nand env.oob get - get environment offset"
794 #endif
795         "";
796 #endif
797
798 U_BOOT_CMD(
799         nand, CONFIG_SYS_MAXARGS, 1, do_nand,
800         "NAND sub-system", nand_help_text
801 );
802
803 static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
804                            ulong offset, ulong addr, char *cmd)
805 {
806         int r;
807         char *s;
808         size_t cnt;
809 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
810         image_header_t *hdr;
811 #endif
812 #if defined(CONFIG_FIT)
813         const void *fit_hdr = NULL;
814 #endif
815
816         s = strchr(cmd, '.');
817         if (s != NULL &&
818             (strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
819                 printf("Unknown nand load suffix '%s'\n", s);
820                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
821                 return 1;
822         }
823
824         printf("\nLoading from %s, offset 0x%lx\n", nand->name, offset);
825
826         cnt = nand->writesize;
827         r = nand_read_skip_bad(nand, offset, &cnt, NULL, nand->size,
828                         (u_char *)addr);
829         if (r) {
830                 puts("** Read error\n");
831                 bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
832                 return 1;
833         }
834         bootstage_mark(BOOTSTAGE_ID_NAND_HDR_READ);
835
836         switch (genimg_get_format ((void *)addr)) {
837 #if defined(CONFIG_IMAGE_FORMAT_LEGACY)
838         case IMAGE_FORMAT_LEGACY:
839                 hdr = (image_header_t *)addr;
840
841                 bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
842                 image_print_contents (hdr);
843
844                 cnt = image_get_image_size (hdr);
845                 break;
846 #endif
847 #if defined(CONFIG_FIT)
848         case IMAGE_FORMAT_FIT:
849                 fit_hdr = (const void *)addr;
850                 puts ("Fit image detected...\n");
851
852                 cnt = fit_get_size (fit_hdr);
853                 break;
854 #endif
855         default:
856                 bootstage_error(BOOTSTAGE_ID_NAND_TYPE);
857                 puts ("** Unknown image type\n");
858                 return 1;
859         }
860         bootstage_mark(BOOTSTAGE_ID_NAND_TYPE);
861
862         r = nand_read_skip_bad(nand, offset, &cnt, NULL, nand->size,
863                         (u_char *)addr);
864         if (r) {
865                 puts("** Read error\n");
866                 bootstage_error(BOOTSTAGE_ID_NAND_READ);
867                 return 1;
868         }
869         bootstage_mark(BOOTSTAGE_ID_NAND_READ);
870
871 #if defined(CONFIG_FIT)
872         /* This cannot be done earlier, we need complete FIT image in RAM first */
873         if (genimg_get_format ((void *)addr) == IMAGE_FORMAT_FIT) {
874                 if (!fit_check_format (fit_hdr)) {
875                         bootstage_error(BOOTSTAGE_ID_NAND_FIT_READ);
876                         puts ("** Bad FIT image format\n");
877                         return 1;
878                 }
879                 bootstage_mark(BOOTSTAGE_ID_NAND_FIT_READ_OK);
880                 fit_print_contents (fit_hdr);
881         }
882 #endif
883
884         /* Loading ok, update default load address */
885
886         load_addr = addr;
887
888         return bootm_maybe_autostart(cmdtp, cmd);
889 }
890
891 static int do_nandboot(cmd_tbl_t *cmdtp, int flag, int argc,
892                        char * const argv[])
893 {
894         char *boot_device = NULL;
895         int idx;
896         ulong addr, offset = 0;
897 #if defined(CONFIG_CMD_MTDPARTS)
898         struct mtd_device *dev;
899         struct part_info *part;
900         u8 pnum;
901
902         if (argc >= 2) {
903                 char *p = (argc == 2) ? argv[1] : argv[2];
904                 if (!(str2long(p, &addr)) && (mtdparts_init() == 0) &&
905                     (find_dev_and_part(p, &dev, &pnum, &part) == 0)) {
906                         if (dev->id->type != MTD_DEV_TYPE_NAND) {
907                                 puts("Not a NAND device\n");
908                                 return 1;
909                         }
910                         if (argc > 3)
911                                 goto usage;
912                         if (argc == 3)
913                                 addr = simple_strtoul(argv[1], NULL, 16);
914                         else
915                                 addr = CONFIG_SYS_LOAD_ADDR;
916                         return nand_load_image(cmdtp, &nand_info[dev->id->num],
917                                                part->offset, addr, argv[0]);
918                 }
919         }
920 #endif
921
922         bootstage_mark(BOOTSTAGE_ID_NAND_PART);
923         switch (argc) {
924         case 1:
925                 addr = CONFIG_SYS_LOAD_ADDR;
926                 boot_device = getenv("bootdevice");
927                 break;
928         case 2:
929                 addr = simple_strtoul(argv[1], NULL, 16);
930                 boot_device = getenv("bootdevice");
931                 break;
932         case 3:
933                 addr = simple_strtoul(argv[1], NULL, 16);
934                 boot_device = argv[2];
935                 break;
936         case 4:
937                 addr = simple_strtoul(argv[1], NULL, 16);
938                 boot_device = argv[2];
939                 offset = simple_strtoul(argv[3], NULL, 16);
940                 break;
941         default:
942 #if defined(CONFIG_CMD_MTDPARTS)
943 usage:
944 #endif
945                 bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
946                 return CMD_RET_USAGE;
947         }
948         bootstage_mark(BOOTSTAGE_ID_NAND_SUFFIX);
949
950         if (!boot_device) {
951                 puts("\n** No boot device **\n");
952                 bootstage_error(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
953                 return 1;
954         }
955         bootstage_mark(BOOTSTAGE_ID_NAND_BOOT_DEVICE);
956
957         idx = simple_strtoul(boot_device, NULL, 16);
958
959         if (idx < 0 || idx >= CONFIG_SYS_MAX_NAND_DEVICE || !nand_info[idx].name) {
960                 printf("\n** Device %d not available\n", idx);
961                 bootstage_error(BOOTSTAGE_ID_NAND_AVAILABLE);
962                 return 1;
963         }
964         bootstage_mark(BOOTSTAGE_ID_NAND_AVAILABLE);
965
966         return nand_load_image(cmdtp, &nand_info[idx], offset, addr, argv[0]);
967 }
968
969 U_BOOT_CMD(nboot, 4, 1, do_nandboot,
970         "boot from NAND device",
971         "[partition] | [[[loadAddr] dev] offset]"
972 );