1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2000
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  */
6 
7 /*
8  * FLASH support
9  */
10 #include <command.h>
11 #include <log.h>
12 #include <vsprintf.h>
13 #include <linux/string.h>
14 #include <u-boot/uuid.h>
15 
16 #if defined(CONFIG_CMD_MTDPARTS)
17 #include <jffs2/jffs2.h>
18 
19 /* partition handling routines */
20 int mtdparts_init(void);
21 int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num);
22 int find_dev_and_part(const char *id, struct mtd_device **dev,
23 		      u8 *part_num, struct part_info **part);
24 #endif
25 
26 #ifdef CONFIG_MTD_NOR_FLASH
27 #include <flash.h>
28 #include <mtd/cfi_flash.h>
29 
30 /*
31  * The user interface starts numbering for Flash banks with 1
32  * for historical reasons.
33  */
34 
35 /*
36  * this routine looks for an abbreviated flash range specification.
37  * the syntax is B:SF[-SL], where B is the bank number, SF is the first
38  * sector to erase, and SL is the last sector to erase (defaults to SF).
39  * bank numbers start at 1 to be consistent with other specs, sector numbers
40  * start at zero.
41  *
42  * returns:	1	- correct spec; *pinfo, *psf and *psl are
43  *			  set appropriately
44  *		0	- doesn't look like an abbreviated spec
45  *		-1	- looks like an abbreviated spec, but got
46  *			  a parsing error, a number out of range,
47  *			  or an invalid flash bank.
48  */
49 static int
abbrev_spec(char * str,flash_info_t ** pinfo,int * psf,int * psl)50 abbrev_spec(char *str, flash_info_t **pinfo, int *psf, int *psl)
51 {
52 	flash_info_t *fp;
53 	int bank, first, last;
54 	char *p, *ep;
55 
56 	p = strchr(str, ':');
57 	if (!p)
58 		return 0;
59 	*p++ = '\0';
60 
61 	bank = dectoul(str, &ep);
62 	if (ep == str || *ep != '\0' ||
63 	    bank < 1 || bank > CFI_FLASH_BANKS)
64 		return -1;
65 
66 	fp = &flash_info[bank - 1];
67 	if (fp->flash_id == FLASH_UNKNOWN)
68 		return -1;
69 
70 	str = p;
71 	p = strchr(str, '-');
72 	if (p)
73 		*p++ = '\0';
74 
75 	first = dectoul(str, &ep);
76 	if (ep == str || *ep != '\0' || first >= fp->sector_count)
77 		return -1;
78 
79 	if (p) {
80 		last = dectoul(p, &ep);
81 		if (ep == p || *ep != '\0' ||
82 		    last < first || last >= fp->sector_count)
83 			return -1;
84 	} else {
85 		last = first;
86 	}
87 
88 	*pinfo = fp;
89 	*psf = first;
90 	*psl = last;
91 
92 	return 1;
93 }
94 
95 /*
96  * Take *addr in Flash and adjust it to fall on the end of its sector
97  */
flash_sect_roundb(ulong * addr)98 int flash_sect_roundb(ulong *addr)
99 {
100 	flash_info_t *info;
101 	ulong bank, sector_end_addr;
102 	char found;
103 	int i;
104 
105 	/* find the end addr of the sector where the *addr is */
106 	found = 0;
107 	for (bank = 0; bank < CFI_FLASH_BANKS && !found; ++bank) {
108 		info = &flash_info[bank];
109 		for (i = 0; i < info->sector_count && !found; ++i) {
110 			/* get the end address of the sector */
111 			if (i == info->sector_count - 1) {
112 				sector_end_addr = info->start[0] +
113 								info->size - 1;
114 			} else {
115 				sector_end_addr = info->start[i + 1] - 1;
116 			}
117 
118 			if (*addr <= sector_end_addr && *addr >= info->start[i]) {
119 				found = 1;
120 				/* adjust *addr if necessary */
121 				if (*addr < sector_end_addr)
122 					*addr = sector_end_addr;
123 			} /* sector */
124 		} /* bank */
125 	}
126 	if (!found) {
127 		/* error, address not in flash */
128 		printf("Error: end address (0x%08lx) not in flash!\n", *addr);
129 		return 1;
130 	}
131 
132 	return 0;
133 }
134 
135 /*
136  * This function computes the start and end addresses for both
137  * erase and protect commands. The range of the addresses on which
138  * either of the commands is to operate can be given in two forms:
139  * 1. <cmd> start end - operate on <'start',  'end')
140  * 2. <cmd> start +length - operate on <'start', start + length)
141  * If the second form is used and the end address doesn't fall on the
142  * sector boundary, than it will be adjusted to the next sector boundary.
143  * If it isn't in the flash, the function will fail (return -1).
144  * Input:
145  *    arg1, arg2: address specification (i.e. both command arguments)
146  * Output:
147  *    addr_first, addr_last: computed address range
148  * Return:
149  *    1: success
150  *   -1: failure (bad format, bad address).
151  */
152 static int
addr_spec(char * arg1,char * arg2,ulong * addr_first,ulong * addr_last)153 addr_spec(char *arg1, char *arg2, ulong *addr_first, ulong *addr_last)
154 {
155 	char *ep;
156 	char len_used; /* indicates if the "start +length" form used */
157 
158 	*addr_first = hextoul(arg1, &ep);
159 	if (ep == arg1 || *ep != '\0')
160 		return -1;
161 
162 	len_used = 0;
163 	if (arg2 && *arg2 == '+') {
164 		len_used = 1;
165 		++arg2;
166 	}
167 
168 	*addr_last = hextoul(arg2, &ep);
169 	if (ep == arg2 || *ep != '\0')
170 		return -1;
171 
172 	if (len_used) {
173 		/*
174 		 * *addr_last has the length, compute correct *addr_last
175 		 * XXX watch out for the integer overflow! Right now it is
176 		 * checked for in both the callers.
177 		 */
178 		*addr_last = *addr_first + *addr_last - 1;
179 
180 		/*
181 		 * It may happen that *addr_last doesn't fall on the sector
182 		 * boundary. We want to round such an address to the next
183 		 * sector boundary, so that the commands don't fail later on.
184 		 */
185 
186 		if (flash_sect_roundb(addr_last) > 0)
187 			return -1;
188 	} /* "start +length" from used */
189 
190 	return 1;
191 }
192 
193 static int
flash_fill_sect_ranges(ulong addr_first,ulong addr_last,int * s_first,int * s_last,int * s_count)194 flash_fill_sect_ranges(ulong addr_first, ulong addr_last,
195 		       int *s_first, int *s_last,
196 		       int *s_count)
197 {
198 	flash_info_t *info;
199 	ulong bank;
200 	int rcode = 0;
201 
202 	*s_count = 0;
203 
204 	for (bank = 0; bank < CFI_FLASH_BANKS; ++bank) {
205 		s_first[bank] = -1;	/* first sector to erase	*/
206 		s_last[bank] = -1;	/* last  sector to erase	*/
207 	}
208 
209 	for (bank = 0, info = &flash_info[0];
210 	     (bank < CFI_FLASH_BANKS) && (addr_first <= addr_last);
211 	     ++bank, ++info) {
212 		ulong b_end;
213 		int sect;
214 		short s_end;
215 
216 		if (info->flash_id == FLASH_UNKNOWN)
217 			continue;
218 
219 		b_end = info->start[0] + info->size - 1;	/* bank end addr */
220 		s_end = info->sector_count - 1;			/* last sector   */
221 
222 		for (sect = 0; sect < info->sector_count; ++sect) {
223 			ulong end;	/* last address in current sect	*/
224 
225 			end = (sect == s_end) ? b_end : info->start[sect + 1] - 1;
226 
227 			if (addr_first > end)
228 				continue;
229 			if (addr_last < info->start[sect])
230 				continue;
231 
232 			if (addr_first == info->start[sect])
233 				s_first[bank] = sect;
234 
235 			if (addr_last  == end)
236 				s_last[bank]  = sect;
237 		}
238 		if (s_first[bank] >= 0) {
239 			if (s_last[bank] < 0) {
240 				if (addr_last > b_end) {
241 					s_last[bank] = s_end;
242 				} else {
243 					puts("Error: end address not on sector boundary\n");
244 					rcode = 1;
245 					break;
246 				}
247 			}
248 			if (s_last[bank] < s_first[bank]) {
249 				puts("Error: end sector precedes start sector\n");
250 				rcode = 1;
251 				break;
252 			}
253 			sect = s_last[bank];
254 			addr_first = (sect == s_end) ? b_end + 1 : info->start[sect + 1];
255 			(*s_count) += s_last[bank] - s_first[bank] + 1;
256 		} else if (addr_first >= info->start[0] && addr_first < b_end) {
257 			puts("Error: start address not on sector boundary\n");
258 			rcode = 1;
259 			break;
260 		} else if (s_last[bank] >= 0) {
261 			puts("Error: cannot span across banks when they are"
262 			     " mapped in reverse order\n");
263 			rcode = 1;
264 			break;
265 		}
266 	}
267 
268 	return rcode;
269 }
270 #endif /* CONFIG_MTD_NOR_FLASH */
271 
do_flinfo(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])272 static int do_flinfo(struct cmd_tbl *cmdtp, int flag, int argc,
273 		     char *const argv[])
274 {
275 #ifdef CONFIG_MTD_NOR_FLASH
276 	ulong bank;
277 #endif
278 
279 #ifdef CONFIG_MTD_NOR_FLASH
280 	if (argc == 1) {	/* print info for all FLASH banks */
281 		for (bank = 0; bank < CFI_FLASH_BANKS; ++bank) {
282 			printf("\nBank # %ld: ", bank + 1);
283 
284 			flash_print_info(&flash_info[bank]);
285 		}
286 		return 0;
287 	}
288 
289 	bank = hextoul(argv[1], NULL);
290 	if (bank < 1 || bank > CFI_FLASH_BANKS) {
291 		printf("Only FLASH Banks # 1 ... # %d supported\n",
292 		       CFI_FLASH_BANKS);
293 		return 1;
294 	}
295 	printf("\nBank # %ld: ", bank);
296 	flash_print_info(&flash_info[bank - 1]);
297 #endif /* CONFIG_MTD_NOR_FLASH */
298 	return 0;
299 }
300 
do_flerase(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])301 static int do_flerase(struct cmd_tbl *cmdtp, int flag, int argc,
302 		      char *const argv[])
303 {
304 #ifdef CONFIG_MTD_NOR_FLASH
305 	flash_info_t *info = NULL;
306 	ulong bank, addr_first, addr_last;
307 	int n, sect_first = 0, sect_last = 0;
308 #if defined(CONFIG_CMD_MTDPARTS)
309 	struct mtd_device *dev;
310 	struct part_info *part;
311 	u8 dev_type, dev_num, pnum;
312 #endif
313 	int rcode = 0;
314 
315 	if (argc < 2)
316 		return CMD_RET_USAGE;
317 
318 	if (strcmp(argv[1], "all") == 0) {
319 		for (bank = 1; bank <= CFI_FLASH_BANKS; ++bank) {
320 			printf("Erase Flash Bank # %ld ", bank);
321 			info = &flash_info[bank - 1];
322 			rcode = flash_erase(info, 0, info->sector_count - 1);
323 		}
324 		return rcode;
325 	}
326 
327 	n = abbrev_spec(argv[1], &info, &sect_first, &sect_last);
328 	if (n) {
329 		if (n < 0) {
330 			puts("Bad sector specification\n");
331 			return 1;
332 		}
333 		printf("Erase Flash Sectors %d-%d in Bank # %zu ",
334 		       sect_first, sect_last, (info - flash_info) + 1);
335 		rcode = flash_erase(info, sect_first, sect_last);
336 		return rcode;
337 	}
338 
339 #if defined(CONFIG_CMD_MTDPARTS)
340 	/* erase <part-id> - erase partition */
341 	if (argc == 2 && mtd_id_parse(argv[1], NULL, &dev_type, &dev_num) == 0) {
342 		mtdparts_init();
343 		if (find_dev_and_part(argv[1], &dev, &pnum, &part) == 0) {
344 			if (dev->id->type == MTD_DEV_TYPE_NOR) {
345 				bank = dev->id->num;
346 				info = &flash_info[bank];
347 				addr_first = part->offset + info->start[0];
348 				addr_last = addr_first + part->size - 1;
349 
350 				printf("Erase Flash Partition %s, bank %ld, 0x%08lx - 0x%08lx ",
351 				       argv[1], bank, addr_first,
352 				       addr_last);
353 
354 				rcode = flash_sect_erase(addr_first, addr_last);
355 				return rcode;
356 			}
357 
358 			printf("cannot erase, not a NOR device\n");
359 			return 1;
360 		}
361 	}
362 #endif
363 
364 	if (argc != 3)
365 		return CMD_RET_USAGE;
366 
367 	if (strcmp(argv[1], "bank") == 0) {
368 		bank = hextoul(argv[2], NULL);
369 		if (bank < 1 || bank > CFI_FLASH_BANKS) {
370 			printf("Only FLASH Banks # 1 ... # %d supported\n",
371 			       CFI_FLASH_BANKS);
372 			return 1;
373 		}
374 		printf("Erase Flash Bank # %ld ", bank);
375 		info = &flash_info[bank - 1];
376 		rcode = flash_erase(info, 0, info->sector_count - 1);
377 		return rcode;
378 	}
379 
380 	if (addr_spec(argv[1], argv[2], &addr_first, &addr_last) < 0) {
381 		printf("Bad address format\n");
382 		return 1;
383 	}
384 
385 	if (addr_first >= addr_last)
386 		return CMD_RET_USAGE;
387 
388 	rcode = flash_sect_erase(addr_first, addr_last);
389 	return rcode;
390 #else
391 	return 0;
392 #endif /* CONFIG_MTD_NOR_FLASH */
393 }
394 
395 #ifdef CONFIG_MTD_NOR_FLASH
flash_sect_erase(ulong addr_first,ulong addr_last)396 int flash_sect_erase(ulong addr_first, ulong addr_last)
397 {
398 	flash_info_t *info;
399 	ulong bank;
400 	int s_first[CFI_FLASH_BANKS], s_last[CFI_FLASH_BANKS];
401 	int erased = 0;
402 	int planned;
403 	int rcode = 0;
404 
405 	rcode = flash_fill_sect_ranges(addr_first, addr_last, s_first, s_last, &planned);
406 
407 	if (planned && rcode == 0) {
408 		for (bank = 0, info = &flash_info[0];
409 		     bank < CFI_FLASH_BANKS && rcode == 0;
410 		     ++bank, ++info) {
411 			if (s_first[bank] >= 0) {
412 				erased += s_last[bank] - s_first[bank] + 1;
413 				debug("Erase Flash from 0x%08lx to 0x%08lx in Bank # %ld ",
414 				      info->start[s_first[bank]],
415 				      (s_last[bank] == info->sector_count) ?
416 				      info->start[0] + info->size - 1 :
417 				      info->start[s_last[bank] + 1] - 1,
418 				      bank + 1);
419 				rcode = flash_erase(info, s_first[bank],
420 						    s_last[bank]);
421 			}
422 		}
423 		if (rcode == 0)
424 			printf("Erased %d sectors\n", erased);
425 	} else if (rcode == 0) {
426 		puts("Error: start and/or end address not on sector boundary\n");
427 		rcode = 1;
428 	}
429 	return rcode;
430 }
431 #endif /* CONFIG_MTD_NOR_FLASH */
432 
do_protect(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])433 static int do_protect(struct cmd_tbl *cmdtp, int flag, int argc,
434 		      char *const argv[])
435 {
436 	int rcode = 0;
437 #ifdef CONFIG_MTD_NOR_FLASH
438 	flash_info_t *info = NULL;
439 	ulong bank;
440 	int i, n, sect_first = 0, sect_last = 0;
441 #if defined(CONFIG_CMD_MTDPARTS)
442 	struct mtd_device *dev;
443 	struct part_info *part;
444 	u8 dev_type, dev_num, pnum;
445 #endif
446 #endif /* CONFIG_MTD_NOR_FLASH */
447 #if defined(CONFIG_MTD_NOR_FLASH)
448 	int p;
449 	ulong addr_first, addr_last;
450 #endif
451 
452 	if (argc < 3)
453 		return CMD_RET_USAGE;
454 
455 #if defined(CONFIG_MTD_NOR_FLASH)
456 	if (strcmp(argv[1], "off") == 0)
457 		p = 0;
458 	else if (strcmp(argv[1], "on") == 0)
459 		p = 1;
460 	else
461 		return CMD_RET_USAGE;
462 #endif
463 
464 #ifdef CONFIG_MTD_NOR_FLASH
465 	if (strcmp(argv[2], "all") == 0) {
466 		for (bank = 1; bank <= CFI_FLASH_BANKS; ++bank) {
467 			info = &flash_info[bank - 1];
468 			if (info->flash_id == FLASH_UNKNOWN)
469 				continue;
470 
471 			printf("%sProtect Flash Bank # %ld\n",
472 			       p ? "" : "Un-", bank);
473 
474 			for (i = 0; i < info->sector_count; ++i) {
475 #if defined(CONFIG_SYS_FLASH_PROTECTION)
476 				if (flash_real_protect(info, i, p))
477 					rcode = 1;
478 				putc('.');
479 #else
480 				info->protect[i] = p;
481 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
482 			}
483 #if defined(CONFIG_SYS_FLASH_PROTECTION)
484 			if (!rcode)
485 				puts(" done\n");
486 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
487 		}
488 		return rcode;
489 	}
490 	n = abbrev_spec(argv[2], &info, &sect_first, &sect_last);
491 	if (n) {
492 		if (n < 0) {
493 			puts("Bad sector specification\n");
494 			return 1;
495 		}
496 		printf("%sProtect Flash Sectors %d-%d in Bank # %zu\n",
497 		       p ? "" : "Un-", sect_first, sect_last,
498 		       (info - flash_info) + 1);
499 		for (i = sect_first; i <= sect_last; i++) {
500 #if defined(CONFIG_SYS_FLASH_PROTECTION)
501 			if (flash_real_protect(info, i, p))
502 				rcode =  1;
503 			putc('.');
504 #else
505 			info->protect[i] = p;
506 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
507 		}
508 
509 #if defined(CONFIG_SYS_FLASH_PROTECTION)
510 		if (!rcode)
511 			puts(" done\n");
512 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
513 
514 		return rcode;
515 	}
516 
517 #if defined(CONFIG_CMD_MTDPARTS)
518 	/* protect on/off <part-id> */
519 	if (argc == 3 && mtd_id_parse(argv[2], NULL, &dev_type, &dev_num) == 0) {
520 		mtdparts_init();
521 		if (find_dev_and_part(argv[2], &dev, &pnum, &part) == 0) {
522 			if (dev->id->type == MTD_DEV_TYPE_NOR) {
523 				bank = dev->id->num;
524 				info = &flash_info[bank];
525 				addr_first = part->offset + info->start[0];
526 				addr_last = addr_first + part->size - 1;
527 
528 				printf("%sProtect Flash Partition %s, "
529 				       "bank %ld, 0x%08lx - 0x%08lx\n",
530 				       p ? "" : "Un", argv[1],
531 				       bank, addr_first, addr_last);
532 
533 				rcode = flash_sect_protect(p, addr_first,
534 							   addr_last);
535 				return rcode;
536 			}
537 
538 			printf("cannot %sprotect, not a NOR device\n",
539 			       p ? "" : "un");
540 			return 1;
541 		}
542 	}
543 #endif
544 
545 	if (argc != 4)
546 		return CMD_RET_USAGE;
547 
548 	if (strcmp(argv[2], "bank") == 0) {
549 		bank = hextoul(argv[3], NULL);
550 		if (bank < 1 || bank > CFI_FLASH_BANKS) {
551 			printf("Only FLASH Banks # 1 ... # %d supported\n",
552 			       CFI_FLASH_BANKS);
553 			return 1;
554 		}
555 		printf("%sProtect Flash Bank # %ld\n",
556 		       p ? "" : "Un-", bank);
557 		info = &flash_info[bank - 1];
558 
559 		if (info->flash_id == FLASH_UNKNOWN) {
560 			puts("missing or unknown FLASH type\n");
561 			return 1;
562 		}
563 		for (i = 0; i < info->sector_count; ++i) {
564 #if defined(CONFIG_SYS_FLASH_PROTECTION)
565 			if (flash_real_protect(info, i, p))
566 				rcode =  1;
567 			putc('.');
568 #else
569 			info->protect[i] = p;
570 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
571 		}
572 
573 #if defined(CONFIG_SYS_FLASH_PROTECTION)
574 		if (!rcode)
575 			puts(" done\n");
576 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
577 
578 		return rcode;
579 	}
580 
581 	if (addr_spec(argv[2], argv[3], &addr_first, &addr_last) < 0) {
582 		printf("Bad address format\n");
583 		return 1;
584 	}
585 
586 	if (addr_first >= addr_last)
587 		return CMD_RET_USAGE;
588 
589 	rcode = flash_sect_protect(p, addr_first, addr_last);
590 #endif /* CONFIG_MTD_NOR_FLASH */
591 	return rcode;
592 }
593 
594 #ifdef CONFIG_MTD_NOR_FLASH
flash_sect_protect(int p,ulong addr_first,ulong addr_last)595 int flash_sect_protect(int p, ulong addr_first, ulong addr_last)
596 {
597 	flash_info_t *info;
598 	ulong bank;
599 	int s_first[CFI_FLASH_BANKS], s_last[CFI_FLASH_BANKS];
600 	int protected, i;
601 	int planned;
602 	int rcode;
603 
604 	rcode = flash_fill_sect_ranges(addr_first, addr_last, s_first, s_last, &planned);
605 
606 	protected = 0;
607 
608 	if (planned && rcode == 0) {
609 		for (bank = 0, info = &flash_info[0];
610 		     bank < CFI_FLASH_BANKS; ++bank, ++info) {
611 			if (info->flash_id == FLASH_UNKNOWN)
612 				continue;
613 
614 			if (s_first[bank] >= 0 && s_first[bank] <= s_last[bank]) {
615 				debug("%sProtecting sectors %d..%d in bank %ld\n",
616 				      p ? "" : "Un-", s_first[bank],
617 				      s_last[bank], bank + 1);
618 				protected += s_last[bank] - s_first[bank] + 1;
619 				for (i = s_first[bank]; i <= s_last[bank]; ++i) {
620 #if defined(CONFIG_SYS_FLASH_PROTECTION)
621 					if (flash_real_protect(info, i, p))
622 						rcode = 1;
623 					putc('.');
624 #else
625 					info->protect[i] = p;
626 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
627 				}
628 			}
629 		}
630 #if defined(CONFIG_SYS_FLASH_PROTECTION)
631 		puts(" done\n");
632 #endif	/* CONFIG_SYS_FLASH_PROTECTION */
633 
634 		printf("%sProtected %d sectors\n",
635 		       p ? "" : "Un-", protected);
636 	} else if (rcode == 0) {
637 		puts("Error: start and/or end address not on sector boundary\n");
638 		rcode = 1;
639 	}
640 	return rcode;
641 }
642 #endif /* CONFIG_MTD_NOR_FLASH */
643 
644 /**************************************************/
645 #if defined(CONFIG_CMD_MTDPARTS)
646 # define TMP_ERASE	"erase <part-id>\n    - erase partition\n"
647 # define TMP_PROT_ON	"protect on <part-id>\n    - protect partition\n"
648 # define TMP_PROT_OFF	"protect off <part-id>\n    - make partition writable\n"
649 #else
650 # define TMP_ERASE	/* empty */
651 # define TMP_PROT_ON	/* empty */
652 # define TMP_PROT_OFF	/* empty */
653 #endif
654 
655 U_BOOT_CMD(
656 	flinfo,    2,    1,    do_flinfo,
657 	"print FLASH memory information",
658 	"\n    - print information for all FLASH memory banks\n"
659 	"flinfo N\n    - print information for FLASH memory bank # N"
660 );
661 
662 U_BOOT_CMD(
663 	erase,   3,   0,  do_flerase,
664 	"erase FLASH memory",
665 	"start end\n"
666 	"    - erase FLASH from addr 'start' to addr 'end'\n"
667 	"erase start +len\n"
668 	"    - erase FLASH from addr 'start' to the end of sect w/addr 'start'+'len'-1\n"
669 	"erase N:SF[-SL]\n    - erase sectors SF-SL in FLASH bank # N\n"
670 	"erase bank N\n    - erase FLASH bank # N\n"
671 	TMP_ERASE
672 	"erase all\n    - erase all FLASH banks"
673 );
674 
675 U_BOOT_CMD(
676 	protect,  4,  0,   do_protect,
677 	"enable or disable FLASH write protection",
678 	"on  start end\n"
679 	"    - protect FLASH from addr 'start' to addr 'end'\n"
680 	"protect on start +len\n"
681 	"    - protect FLASH from addr 'start' to end of sect w/addr 'start'+'len'-1\n"
682 	"protect on  N:SF[-SL]\n"
683 	"    - protect sectors SF-SL in FLASH bank # N\n"
684 	"protect on  bank N\n    - protect FLASH bank # N\n"
685 	TMP_PROT_ON
686 	"protect on  all\n    - protect all FLASH banks\n"
687 	"protect off start end\n"
688 	"    - make FLASH from addr 'start' to addr 'end' writable\n"
689 	"protect off start +len\n"
690 	"    - make FLASH from addr 'start' to end of sect w/addr 'start'+'len'-1 wrtable\n"
691 	"protect off N:SF[-SL]\n"
692 	"    - make sectors SF-SL writable in FLASH bank # N\n"
693 	"protect off bank N\n    - make FLASH bank # N writable\n"
694 	TMP_PROT_OFF
695 	"protect off all\n    - make all FLASH banks writable"
696 );
697 
698 #undef	TMP_ERASE
699 #undef	TMP_PROT_ON
700 #undef	TMP_PROT_OFF
701