82 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
174 static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,  in read_bbt()  argument
178 	struct nand_chip *this = mtd->priv;  in read_bbt()
201 		res = mtd_read(mtd, from, len, &retlen, buf);  in read_bbt()
205 					from & ~mtd->writesize);  in read_bbt()
209 					from & ~mtd->writesize);  in read_bbt()
230 					mtd->ecc_stats.bbtblocks++;  in read_bbt()
247 				mtd->ecc_stats.badblocks++;  in read_bbt()
267 static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)  in read_abs_bbt()  argument
269 	struct nand_chip *this = mtd->priv;  in read_abs_bbt()
276 				res = read_bbt(mtd, buf, td->pages[i],  in read_abs_bbt()
284 		res = read_bbt(mtd, buf, td->pages[0],  in read_abs_bbt()
285 				mtd->size >> this->bbt_erase_shift, td, 0);  in read_abs_bbt()
293 static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_data()  argument
303 	return mtd_read(mtd, offs, len, &retlen, buf);  in scan_read_data()
317 static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_oob()  argument
325 	ops.ooblen = mtd->oobsize;  in scan_read_oob()
329 		ops.len = min(len, (size_t)mtd->writesize);  in scan_read_oob()
332 		res = mtd_read_oob(mtd, offs, &ops);  in scan_read_oob()
340 		buf += mtd->oobsize + mtd->writesize;  in scan_read_oob()
341 		len -= mtd->writesize;  in scan_read_oob()
342 		offs += mtd->writesize;  in scan_read_oob()
347 static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read()  argument
351 		return scan_read_data(mtd, buf, offs, td);  in scan_read()
353 		return scan_read_oob(mtd, buf, offs, len);  in scan_read()
357 static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,  in scan_write_bbt()  argument
364 	ops.ooblen = mtd->oobsize;  in scan_write_bbt()
369 	return mtd_write_oob(mtd, offs, &ops);  in scan_write_bbt()
372 static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)  in bbt_get_ver_offs()  argument
377 		ver_offs += mtd->writesize;  in bbt_get_ver_offs()
391 static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,  in read_abs_bbts()  argument
394 	struct nand_chip *this = mtd->priv;  in read_abs_bbts()
398 		scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift,  in read_abs_bbts()
399 			      mtd->writesize, td);  in read_abs_bbts()
400 		td->version[0] = buf[bbt_get_ver_offs(mtd, td)];  in read_abs_bbts()
407 		scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift,  in read_abs_bbts()
408 			      mtd->writesize, md);  in read_abs_bbts()
409 		md->version[0] = buf[bbt_get_ver_offs(mtd, md)];  in read_abs_bbts()
416 static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,  in scan_block_fast()  argument
422 	ops.ooblen = mtd->oobsize;  in scan_block_fast()
433 		ret = mtd_read_oob(mtd, offs, &ops);  in scan_block_fast()
441 		offs += mtd->writesize;  in scan_block_fast()
457 static int create_bbt(struct mtd_info *mtd, uint8_t *buf,  in create_bbt()  argument
460 	struct nand_chip *this = mtd->priv;  in create_bbt()
473 		numblocks = mtd->size >> this->bbt_erase_shift;  in create_bbt()
489 		from += mtd->erasesize - (mtd->writesize * numpages);  in create_bbt()
496 		ret = scan_block_fast(mtd, bd, from, buf, numpages);  in create_bbt()
504 			mtd->ecc_stats.badblocks++;  in create_bbt()
527 static int search_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td)  in search_bbt()  argument
529 	struct nand_chip *this = mtd->priv;  in search_bbt()
532 	int scanlen = mtd->writesize + mtd->oobsize;  in search_bbt()
538 		startblock = (mtd->size >> this->bbt_erase_shift) - 1;  in search_bbt()
552 		bbtblocks = mtd->size >> this->bbt_erase_shift;  in search_bbt()
566 			scan_read(mtd, buf, offs, mtd->writesize, td);  in search_bbt()
567 			if (!check_pattern(buf, scanlen, mtd->writesize, td)) {  in search_bbt()
570 					offs = bbt_get_ver_offs(mtd, td);  in search_bbt()
598 static void search_read_bbts(struct mtd_info *mtd, uint8_t *buf,  in search_read_bbts()  argument
603 	search_bbt(mtd, buf, td);  in search_read_bbts()
607 		search_bbt(mtd, buf, md);  in search_read_bbts()
620 static int write_bbt(struct mtd_info *mtd, uint8_t *buf,  in write_bbt()  argument
624 	struct nand_chip *this = mtd->priv;  in write_bbt()
635 	ops.ooblen = mtd->oobsize;  in write_bbt()
653 		numblocks = (int)(mtd->size >> this->bbt_erase_shift);  in write_bbt()
725 			res = mtd_read(mtd, to, len, &retlen, buf);  in write_bbt()
734 			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;  in write_bbt()
736 			res = mtd_read_oob(mtd, to + mtd->writesize, &ops);  in write_bbt()
745 			ooboffs = len + (pageoffs * mtd->oobsize);  in write_bbt()
757 			len = ALIGN(len, mtd->writesize);  in write_bbt()
766 			len = ALIGN(len, mtd->writesize);  in write_bbt()
769 			       (len >> this->page_shift)* mtd->oobsize);  in write_bbt()
789 		einfo.mtd = mtd;  in write_bbt()
792 		res = nand_erase_nand(mtd, &einfo, 1);  in write_bbt()
796 		res = scan_write_bbt(mtd, to, len, buf,  in write_bbt()
823 static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_memory_bbt()  argument
825 	struct nand_chip *this = mtd->priv;  in nand_memory_bbt()
827 	return create_bbt(mtd, this->buffers->databuf, bd, -1);  in nand_memory_bbt()
841 static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)  in check_create()  argument
844 	struct nand_chip *this = mtd->priv;  in check_create()
901 				create_bbt(mtd, buf, bd, chipsel);  in check_create()
910 			res = read_abs_bbt(mtd, buf, rd, chipsel);  in check_create()
921 			res2 = read_abs_bbt(mtd, buf, rd2, chipsel);  in check_create()
943 			res = write_bbt(mtd, buf, td, md, chipsel);  in check_create()
950 			res = write_bbt(mtd, buf, md, td, chipsel);  in check_create()
966 static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)  in mark_bbt_region()  argument
968 	struct nand_chip *this = mtd->priv;  in mark_bbt_region()
978 		nrblocks = (int)(mtd->size >> this->bbt_erase_shift);  in mark_bbt_region()
991 				nand_update_bbt(mtd, (loff_t)block <<  in mark_bbt_region()
1013 			nand_update_bbt(mtd, (loff_t)(block - 1) <<  in mark_bbt_region()
1026 static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in verify_bbt_descr()  argument
1028 	struct nand_chip *this = mtd->priv;  in verify_bbt_descr()
1058 		table_size = mtd->size >> this->bbt_erase_shift;  in verify_bbt_descr()
1078 int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_scan_bbt()  argument
1080 	struct nand_chip *this = mtd->priv;  in nand_scan_bbt()
1086 	len = mtd->size >> (this->bbt_erase_shift + 2);  in nand_scan_bbt()
1100 		if ((res = nand_memory_bbt(mtd, bd))) {  in nand_scan_bbt()
1107 	verify_bbt_descr(mtd, td);  in nand_scan_bbt()
1108 	verify_bbt_descr(mtd, md);  in nand_scan_bbt()
1112 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_scan_bbt()
1122 		read_abs_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1125 		search_read_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1128 	res = check_create(mtd, buf, bd);  in nand_scan_bbt()
1131 	mark_bbt_region(mtd, td);  in nand_scan_bbt()
1133 		mark_bbt_region(mtd, md);  in nand_scan_bbt()
1146 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)  in nand_update_bbt()  argument
1148 	struct nand_chip *this = mtd->priv;  in nand_update_bbt()
1160 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_update_bbt()
1180 		res = write_bbt(mtd, buf, td, md, chipsel);  in nand_update_bbt()
1186 		res = write_bbt(mtd, buf, md, td, chipsel);  in nand_update_bbt()
1280 int nand_default_bbt(struct mtd_info *mtd)  in nand_default_bbt()  argument
1282 	struct nand_chip *this = mtd->priv;  in nand_default_bbt()
1308 	return nand_scan_bbt(mtd, this->badblock_pattern);  in nand_default_bbt()
1316 int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)  in nand_isreserved_bbt()  argument
1318 	struct nand_chip *this = mtd->priv;  in nand_isreserved_bbt()
1331 int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)  in nand_isbad_bbt()  argument
1333 	struct nand_chip *this = mtd->priv;  in nand_isbad_bbt()
1358 int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs)  in nand_markbad_bbt()  argument
1360 	struct nand_chip *this = mtd->priv;  in nand_markbad_bbt()
1370 		ret = nand_update_bbt(mtd, offs);  in nand_markbad_bbt()