77 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
169 static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,  in read_bbt()  argument
173 	struct nand_chip *this = mtd_to_nand(mtd);  in read_bbt()
196 		res = mtd_read(mtd, from, len, &retlen, buf);  in read_bbt()
200 					from & ~mtd->writesize);  in read_bbt()
204 					from & ~mtd->writesize);  in read_bbt()
225 					mtd->ecc_stats.bbtblocks++;  in read_bbt()
242 				mtd->ecc_stats.badblocks++;  in read_bbt()
262 static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)  in read_abs_bbt()  argument
264 	struct nand_chip *this = mtd_to_nand(mtd);  in read_abs_bbt()
271 				res = read_bbt(mtd, buf, td->pages[i],  in read_abs_bbt()
279 		res = read_bbt(mtd, buf, td->pages[0],  in read_abs_bbt()
280 				mtd->size >> this->bbt_erase_shift, td, 0);  in read_abs_bbt()
288 static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_data()  argument
298 	return mtd_read(mtd, offs, len, &retlen, buf);  in scan_read_data()
312 static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_oob()  argument
320 	ops.ooblen = mtd->oobsize;  in scan_read_oob()
324 		ops.len = min(len, (size_t)mtd->writesize);  in scan_read_oob()
327 		res = mtd_read_oob(mtd, offs, &ops);  in scan_read_oob()
335 		buf += mtd->oobsize + mtd->writesize;  in scan_read_oob()
336 		len -= mtd->writesize;  in scan_read_oob()
337 		offs += mtd->writesize;  in scan_read_oob()
342 static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read()  argument
346 		return scan_read_data(mtd, buf, offs, td);  in scan_read()
348 		return scan_read_oob(mtd, buf, offs, len);  in scan_read()
352 static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,  in scan_write_bbt()  argument
359 	ops.ooblen = mtd->oobsize;  in scan_write_bbt()
364 	return mtd_write_oob(mtd, offs, &ops);  in scan_write_bbt()
367 static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)  in bbt_get_ver_offs()  argument
372 		ver_offs += mtd->writesize;  in bbt_get_ver_offs()
386 static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,  in read_abs_bbts()  argument
389 	struct nand_chip *this = mtd_to_nand(mtd);  in read_abs_bbts()
393 		scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift,  in read_abs_bbts()
394 			      mtd->writesize, td);  in read_abs_bbts()
395 		td->version[0] = buf[bbt_get_ver_offs(mtd, td)];  in read_abs_bbts()
402 		scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift,  in read_abs_bbts()
403 			      mtd->writesize, md);  in read_abs_bbts()
404 		md->version[0] = buf[bbt_get_ver_offs(mtd, md)];  in read_abs_bbts()
411 static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,  in scan_block_fast()  argument
417 	ops.ooblen = mtd->oobsize;  in scan_block_fast()
428 		ret = mtd_read_oob(mtd, offs, &ops);  in scan_block_fast()
436 		offs += mtd->writesize;  in scan_block_fast()
452 static int create_bbt(struct mtd_info *mtd, uint8_t *buf,  in create_bbt()  argument
455 	struct nand_chip *this = mtd_to_nand(mtd);  in create_bbt()
468 		numblocks = mtd->size >> this->bbt_erase_shift;  in create_bbt()
484 		from += mtd->erasesize - (mtd->writesize * numpages);  in create_bbt()
491 			ret = this->block_bad(mtd, from);  in create_bbt()
493 			ret = scan_block_fast(mtd, bd, from, buf, numpages);  in create_bbt()
501 			mtd->ecc_stats.badblocks++;  in create_bbt()
524 static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)  in search_bbt()  argument
526 	struct nand_chip *this = mtd_to_nand(mtd);  in search_bbt()
529 	int scanlen = mtd->writesize + mtd->oobsize;  in search_bbt()
535 		startblock = (mtd->size >> this->bbt_erase_shift) - 1;  in search_bbt()
549 		bbtblocks = mtd->size >> this->bbt_erase_shift;  in search_bbt()
563 			scan_read(mtd, buf, offs, mtd->writesize, td);  in search_bbt()
564 			if (!check_pattern(buf, scanlen, mtd->writesize, td)) {  in search_bbt()
567 					offs = bbt_get_ver_offs(mtd, td);  in search_bbt()
595 static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,  in search_read_bbts()  argument
600 	search_bbt(mtd, buf, td);  in search_read_bbts()
604 		search_bbt(mtd, buf, md);  in search_read_bbts()
617 static int write_bbt(struct mtd_info *mtd, uint8_t *buf,  in write_bbt()  argument
621 	struct nand_chip *this = mtd_to_nand(mtd);  in write_bbt()
632 	ops.ooblen = mtd->oobsize;  in write_bbt()
650 		numblocks = (int)(mtd->size >> this->bbt_erase_shift);  in write_bbt()
722 			res = mtd_read(mtd, to, len, &retlen, buf);  in write_bbt()
731 			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;  in write_bbt()
733 			res = mtd_read_oob(mtd, to + mtd->writesize, &ops);  in write_bbt()
742 			ooboffs = len + (pageoffs * mtd->oobsize);  in write_bbt()
754 			len = ALIGN(len, mtd->writesize);  in write_bbt()
763 			len = ALIGN(len, mtd->writesize);  in write_bbt()
766 			       (len >> this->page_shift)* mtd->oobsize);  in write_bbt()
786 		einfo.mtd = mtd;  in write_bbt()
789 		res = nand_erase_nand(mtd, &einfo, 1);  in write_bbt()
793 		res = scan_write_bbt(mtd, to, len, buf,  in write_bbt()
820 static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_memory_bbt()  argument
822 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_memory_bbt()
824 	return create_bbt(mtd, this->buffers->databuf, bd, -1);  in nand_memory_bbt()
838 static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)  in check_create()  argument
841 	struct nand_chip *this = mtd_to_nand(mtd);  in check_create()
898 				create_bbt(mtd, buf, bd, chipsel);  in check_create()
907 			res = read_abs_bbt(mtd, buf, rd, chipsel);  in check_create()
918 			res2 = read_abs_bbt(mtd, buf, rd2, chipsel);  in check_create()
940 			res = write_bbt(mtd, buf, td, md, chipsel);  in check_create()
947 			res = write_bbt(mtd, buf, md, td, chipsel);  in check_create()
963 static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)  in mark_bbt_region()  argument
965 	struct nand_chip *this = mtd_to_nand(mtd);  in mark_bbt_region()
975 		nrblocks = (int)(mtd->size >> this->bbt_erase_shift);  in mark_bbt_region()
988 				nand_update_bbt(mtd, (loff_t)block <<  in mark_bbt_region()
1010 			nand_update_bbt(mtd, (loff_t)(block - 1) <<  in mark_bbt_region()
1023 static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in verify_bbt_descr()  argument
1025 	struct nand_chip *this = mtd_to_nand(mtd);  in verify_bbt_descr()
1055 		table_size = mtd->size >> this->bbt_erase_shift;  in verify_bbt_descr()
1075 static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_scan_bbt()  argument
1077 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_scan_bbt()
1083 	len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1;  in nand_scan_bbt()
1097 		if ((res = nand_memory_bbt(mtd, bd))) {  in nand_scan_bbt()
1103 	verify_bbt_descr(mtd, td);  in nand_scan_bbt()
1104 	verify_bbt_descr(mtd, md);  in nand_scan_bbt()
1108 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_scan_bbt()
1117 		read_abs_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1120 		search_read_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1123 	res = check_create(mtd, buf, bd);  in nand_scan_bbt()
1128 	mark_bbt_region(mtd, td);  in nand_scan_bbt()
1130 		mark_bbt_region(mtd, md);  in nand_scan_bbt()
1148 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)  in nand_update_bbt()  argument
1150 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_update_bbt()
1162 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_update_bbt()
1182 		res = write_bbt(mtd, buf, td, md, chipsel);  in nand_update_bbt()
1188 		res = write_bbt(mtd, buf, md, td, chipsel);  in nand_update_bbt()
1282 int nand_default_bbt(struct mtd_info *mtd)  in nand_default_bbt()  argument
1284 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_default_bbt()
1310 	return nand_scan_bbt(mtd, this->badblock_pattern);  in nand_default_bbt()
1318 int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)  in nand_isreserved_bbt()  argument
1320 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_isreserved_bbt()
1333 int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)  in nand_isbad_bbt()  argument
1335 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_isbad_bbt()
1360 int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs)  in nand_markbad_bbt()  argument
1362 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_markbad_bbt()
1372 		ret = nand_update_bbt(mtd, offs);  in nand_markbad_bbt()