143 static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,  in read_bbt()  argument
147 	struct nand_chip *this = mtd->priv;  in read_bbt()
157 		res = mtd->read(mtd, from, len, &retlen, buf);  in read_bbt()
177 					mtd->ecc_stats.bbtblocks++;  in read_bbt()
189 				mtd->ecc_stats.badblocks++;  in read_bbt()
209 static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)  in read_abs_bbt()  argument
211 	struct nand_chip *this = mtd->priv;  in read_abs_bbt()
220 …res = read_bbt (mtd, buf, td->pages[i], this->chipsize >> this->bbt_erase_shift, bits, offs, td->r…  in read_abs_bbt()
226 …res = read_bbt (mtd, buf, td->pages[0], mtd->size >> this->bbt_erase_shift, bits, 0, td->reserved_…  in read_abs_bbt()
236 static int scan_read_raw(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_raw()  argument
243 	ops.ooblen = mtd->oobsize;  in scan_read_raw()
248 	return mtd->read_oob(mtd, offs, &ops);  in scan_read_raw()
254 static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,  in scan_write_bbt()  argument
261 	ops.ooblen = mtd->oobsize;  in scan_write_bbt()
266 	return mtd->write_oob(mtd, offs, &ops);  in scan_write_bbt()
280 static int read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,  in read_abs_bbts()  argument
283 	struct nand_chip *this = mtd->priv;  in read_abs_bbts()
287 		scan_read_raw(mtd, buf, (loff_t)td->pages[0] << this->page_shift,  in read_abs_bbts()
288 			      mtd->writesize);  in read_abs_bbts()
289 		td->version[0] = buf[mtd->writesize + td->veroffs];  in read_abs_bbts()
296 		scan_read_raw(mtd, buf, (loff_t)md->pages[0] << this->page_shift,  in read_abs_bbts()
297 			      mtd->writesize);  in read_abs_bbts()
298 		md->version[0] = buf[mtd->writesize + md->veroffs];  in read_abs_bbts()
308 static int scan_block_full(struct mtd_info *mtd, struct nand_bbt_descr *bd,  in scan_block_full()  argument
314 	ret = scan_read_raw(mtd, buf, offs, readlen);  in scan_block_full()
319 		if (check_pattern(buf, scanlen, mtd->writesize, bd))  in scan_block_full()
328 static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,  in scan_block_fast()  argument
334 	ops.ooblen = mtd->oobsize;  in scan_block_fast()
346 		ret = mtd->read_oob(mtd, offs, &ops);  in scan_block_fast()
353 		offs += mtd->writesize;  in scan_block_fast()
369 static int create_bbt(struct mtd_info *mtd, uint8_t *buf,  in create_bbt()  argument
372 	struct nand_chip *this = mtd->priv;  in create_bbt()
395 		scanlen = mtd->writesize + mtd->oobsize;  in create_bbt()
396 		readlen = len * mtd->writesize;  in create_bbt()
402 		numblocks = mtd->size >> (this->bbt_erase_shift - 1);  in create_bbt()
421 			ret = scan_block_full(mtd, bd, from, buf, readlen,  in create_bbt()
424 			ret = scan_block_fast(mtd, bd, from, buf, len);  in create_bbt()
433 			mtd->ecc_stats.badblocks++;  in create_bbt()
459 static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)  in search_bbt()  argument
461 	struct nand_chip *this = mtd->priv;  in search_bbt()
464 	int scanlen = mtd->writesize + mtd->oobsize;  in search_bbt()
470 		startblock = (mtd->size >> this->bbt_erase_shift) - 1;  in search_bbt()
484 		bbtblocks = mtd->size >> this->bbt_erase_shift;  in search_bbt()
501 			scan_read_raw(mtd, buf, offs, mtd->writesize);  in search_bbt()
502 			if (!check_pattern(buf, scanlen, mtd->writesize, td)) {  in search_bbt()
505 					td->version[i] = buf[mtd->writesize + td->veroffs];  in search_bbt()
532 static int search_read_bbts(struct mtd_info *mtd, uint8_t * buf, struct nand_bbt_descr *td, struct …  in search_read_bbts()  argument
535 	search_bbt(mtd, buf, td);  in search_read_bbts()
539 		search_bbt(mtd, buf, md);  in search_read_bbts()
557 static int write_bbt(struct mtd_info *mtd, uint8_t *buf,  in write_bbt()  argument
561 	struct nand_chip *this = mtd->priv;  in write_bbt()
572 	ops.ooblen = mtd->oobsize;  in write_bbt()
590 		numblocks = (int)(mtd->size >> this->bbt_erase_shift);  in write_bbt()
663 			res = mtd->read(mtd, to, len, &retlen, buf);  in write_bbt()
676 			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;  in write_bbt()
678 			res = mtd->read_oob(mtd, to + mtd->writesize, &ops);  in write_bbt()
687 			ooboffs = len + (pageoffs * mtd->oobsize);  in write_bbt()
693 			len = (len + (mtd->writesize - 1)) &  in write_bbt()
694 				~(mtd->writesize - 1);  in write_bbt()
697 			       (len >> this->page_shift)* mtd->oobsize);  in write_bbt()
721 		einfo.mtd = mtd;  in write_bbt()
724 		res = nand_erase_nand(mtd, &einfo, 1);  in write_bbt()
728 		res = scan_write_bbt(mtd, to, len, buf, &buf[len]);  in write_bbt()
754 static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_memory_bbt()  argument
756 	struct nand_chip *this = mtd->priv;  in nand_memory_bbt()
759 	return create_bbt(mtd, this->buffers->databuf, bd, -1);  in nand_memory_bbt()
774 static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)  in check_create()  argument
777 	struct nand_chip *this = mtd->priv;  in check_create()
848 		create_bbt(mtd, buf, bd, chipsel);  in check_create()
856 			read_abs_bbt(mtd, buf, rd, chipsel);  in check_create()
859 			read_abs_bbt(mtd, buf, rd2, chipsel);  in check_create()
863 			res = write_bbt(mtd, buf, td, md, chipsel);  in check_create()
870 			res = write_bbt(mtd, buf, md, td, chipsel);  in check_create()
887 static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)  in mark_bbt_region()  argument
889 	struct nand_chip *this = mtd->priv;  in mark_bbt_region()
899 		nrblocks = (int)(mtd->size >> this->bbt_erase_shift);  in mark_bbt_region()
913 				nand_update_bbt(mtd, (loff_t)block << (this->bbt_erase_shift - 1));  in mark_bbt_region()
934 			nand_update_bbt(mtd, (loff_t)(block - 2) << (this->bbt_erase_shift - 1));  in mark_bbt_region()
952 int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_scan_bbt()  argument
954 	struct nand_chip *this = mtd->priv;  in nand_scan_bbt()
960 	len = mtd->size >> (this->bbt_erase_shift + 2);  in nand_scan_bbt()
972 		if ((res = nand_memory_bbt(mtd, bd))) {  in nand_scan_bbt()
982 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_scan_bbt()
993 		res = read_abs_bbts(mtd, buf, td, md);  in nand_scan_bbt()
996 		res = search_read_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1000 		res = check_create(mtd, buf, bd);  in nand_scan_bbt()
1003 	mark_bbt_region(mtd, td);  in nand_scan_bbt()
1005 		mark_bbt_region(mtd, md);  in nand_scan_bbt()
1018 int nand_update_bbt(struct mtd_info *mtd, loff_t offs)  in nand_update_bbt()  argument
1020 	struct nand_chip *this = mtd->priv;  in nand_update_bbt()
1032 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_update_bbt()
1056 		res = write_bbt(mtd, buf, td, md, chipsel);  in nand_update_bbt()
1062 		res = write_bbt(mtd, buf, md, td, chipsel);  in nand_update_bbt()
1144 int nand_default_bbt(struct mtd_info *mtd)  in nand_default_bbt()  argument
1146 	struct nand_chip *this = mtd->priv;  in nand_default_bbt()
1162 		return nand_scan_bbt(mtd, &agand_flashbased);  in nand_default_bbt()
1173 			this->badblock_pattern = (mtd->writesize > 512) ? &largepage_flashbased : &smallpage_flashbased;  in nand_default_bbt()
1179 			this->badblock_pattern = (mtd->writesize > 512) ?  in nand_default_bbt()
1183 	return nand_scan_bbt(mtd, this->badblock_pattern);  in nand_default_bbt()
1193 int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)  in nand_isbad_bbt()  argument
1195 	struct nand_chip *this = mtd->priv;  in nand_isbad_bbt()