79 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs);
171 static int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num,  in read_bbt()  argument
175 	struct nand_chip *this = mtd_to_nand(mtd);  in read_bbt()
198 		res = mtd_read(mtd, from, len, &retlen, buf);  in read_bbt()
202 					from & ~mtd->writesize);  in read_bbt()
206 					from & ~mtd->writesize);  in read_bbt()
227 					mtd->ecc_stats.bbtblocks++;  in read_bbt()
244 				mtd->ecc_stats.badblocks++;  in read_bbt()
264 static int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip)  in read_abs_bbt()  argument
266 	struct nand_chip *this = mtd_to_nand(mtd);  in read_abs_bbt()
273 				res = read_bbt(mtd, buf, td->pages[i],  in read_abs_bbt()
281 		res = read_bbt(mtd, buf, td->pages[0],  in read_abs_bbt()
282 				mtd->size >> this->bbt_erase_shift, td, 0);  in read_abs_bbt()
290 static int scan_read_data(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_data()  argument
300 	return mtd_read(mtd, offs, len, &retlen, buf);  in scan_read_data()
314 static int scan_read_oob(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read_oob()  argument
322 	ops.ooblen = mtd->oobsize;  in scan_read_oob()
326 		ops.len = min(len, (size_t)mtd->writesize);  in scan_read_oob()
329 		res = mtd_read_oob(mtd, offs, &ops);  in scan_read_oob()
337 		buf += mtd->oobsize + mtd->writesize;  in scan_read_oob()
338 		len -= mtd->writesize;  in scan_read_oob()
339 		offs += mtd->writesize;  in scan_read_oob()
344 static int scan_read(struct mtd_info *mtd, uint8_t *buf, loff_t offs,  in scan_read()  argument
348 		return scan_read_data(mtd, buf, offs, td);  in scan_read()
350 		return scan_read_oob(mtd, buf, offs, len);  in scan_read()
354 static int scan_write_bbt(struct mtd_info *mtd, loff_t offs, size_t len,  in scan_write_bbt()  argument
361 	ops.ooblen = mtd->oobsize;  in scan_write_bbt()
366 	return mtd_write_oob(mtd, offs, &ops);  in scan_write_bbt()
369 static u32 bbt_get_ver_offs(struct mtd_info *mtd, struct nand_bbt_descr *td)  in bbt_get_ver_offs()  argument
374 		ver_offs += mtd->writesize;  in bbt_get_ver_offs()
388 static void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf,  in read_abs_bbts()  argument
391 	struct nand_chip *this = mtd_to_nand(mtd);  in read_abs_bbts()
395 		scan_read(mtd, buf, (loff_t)td->pages[0] << this->page_shift,  in read_abs_bbts()
396 			      mtd->writesize, td);  in read_abs_bbts()
397 		td->version[0] = buf[bbt_get_ver_offs(mtd, td)];  in read_abs_bbts()
404 		scan_read(mtd, buf, (loff_t)md->pages[0] << this->page_shift,  in read_abs_bbts()
405 			      mtd->writesize, md);  in read_abs_bbts()
406 		md->version[0] = buf[bbt_get_ver_offs(mtd, md)];  in read_abs_bbts()
413 static int scan_block_fast(struct mtd_info *mtd, struct nand_bbt_descr *bd,  in scan_block_fast()  argument
419 	ops.ooblen = mtd->oobsize;  in scan_block_fast()
430 		ret = mtd_read_oob(mtd, offs, &ops);  in scan_block_fast()
438 		offs += mtd->writesize;  in scan_block_fast()
454 static int create_bbt(struct mtd_info *mtd, uint8_t *buf,  in create_bbt()  argument
457 	struct nand_chip *this = mtd_to_nand(mtd);  in create_bbt()
470 		numblocks = mtd->size >> this->bbt_erase_shift;  in create_bbt()
486 		from += mtd->erasesize - (mtd->writesize * numpages);  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()
686 	struct mtd_info *mtd = nand_to_mtd(this);  in mark_bbt_block_bad()  local
693 	res = this->block_markbad(mtd, to);  in mark_bbt_block_bad()
711 static int write_bbt(struct mtd_info *mtd, uint8_t *buf,  in write_bbt()  argument
715 	struct nand_chip *this = mtd_to_nand(mtd);  in write_bbt()
726 	ops.ooblen = mtd->oobsize;  in write_bbt()
744 		numblocks = (int)(mtd->size >> this->bbt_erase_shift);  in write_bbt()
791 			res = mtd_read(mtd, to, len, &retlen, buf);  in write_bbt()
800 			ops.ooblen = (len >> this->page_shift) * mtd->oobsize;  in write_bbt()
802 			res = mtd_read_oob(mtd, to + mtd->writesize, &ops);  in write_bbt()
811 			ooboffs = len + (pageoffs * mtd->oobsize);  in write_bbt()
823 			len = ALIGN(len, mtd->writesize);  in write_bbt()
832 			len = ALIGN(len, mtd->writesize);  in write_bbt()
835 			       (len >> this->page_shift)* mtd->oobsize);  in write_bbt()
855 		einfo.mtd = mtd;  in write_bbt()
858 		res = nand_erase_nand(mtd, &einfo, 1);  in write_bbt()
866 		res = scan_write_bbt(mtd, to, len, buf,  in write_bbt()
897 static inline int nand_memory_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_memory_bbt()  argument
899 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_memory_bbt()
901 	return create_bbt(mtd, this->buffers->databuf, bd, -1);  in nand_memory_bbt()
915 static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd)  in check_create()  argument
918 	struct nand_chip *this = mtd_to_nand(mtd);  in check_create()
975 				create_bbt(mtd, buf, bd, chipsel);  in check_create()
984 			res = read_abs_bbt(mtd, buf, rd, chipsel);  in check_create()
995 			res2 = read_abs_bbt(mtd, buf, rd2, chipsel);  in check_create()
1017 			res = write_bbt(mtd, buf, td, md, chipsel);  in check_create()
1024 			res = write_bbt(mtd, buf, md, td, chipsel);  in check_create()
1040 static void mark_bbt_region(struct mtd_info *mtd, struct nand_bbt_descr *td)  in mark_bbt_region()  argument
1042 	struct nand_chip *this = mtd_to_nand(mtd);  in mark_bbt_region()
1052 		nrblocks = (int)(mtd->size >> this->bbt_erase_shift);  in mark_bbt_region()
1065 				nand_update_bbt(mtd, (loff_t)block <<  in mark_bbt_region()
1087 			nand_update_bbt(mtd, (loff_t)(block - 1) <<  in mark_bbt_region()
1100 static void verify_bbt_descr(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in verify_bbt_descr()  argument
1102 	struct nand_chip *this = mtd_to_nand(mtd);  in verify_bbt_descr()
1132 		table_size = mtd->size >> this->bbt_erase_shift;  in verify_bbt_descr()
1152 static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)  in nand_scan_bbt()  argument
1154 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_scan_bbt()
1160 	len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1;  in nand_scan_bbt()
1174 		if ((res = nand_memory_bbt(mtd, bd))) {  in nand_scan_bbt()
1180 	verify_bbt_descr(mtd, td);  in nand_scan_bbt()
1181 	verify_bbt_descr(mtd, md);  in nand_scan_bbt()
1185 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_scan_bbt()
1194 		read_abs_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1197 		search_read_bbts(mtd, buf, td, md);  in nand_scan_bbt()
1200 	res = check_create(mtd, buf, bd);  in nand_scan_bbt()
1205 	mark_bbt_region(mtd, td);  in nand_scan_bbt()
1207 		mark_bbt_region(mtd, md);  in nand_scan_bbt()
1225 static int nand_update_bbt(struct mtd_info *mtd, loff_t offs)  in nand_update_bbt()  argument
1227 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_update_bbt()
1239 	len += (len >> this->page_shift) * mtd->oobsize;  in nand_update_bbt()
1259 		res = write_bbt(mtd, buf, td, md, chipsel);  in nand_update_bbt()
1265 		res = write_bbt(mtd, buf, md, td, chipsel);  in nand_update_bbt()
1359 int nand_default_bbt(struct mtd_info *mtd)  in nand_default_bbt()  argument
1361 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_default_bbt()
1387 	return nand_scan_bbt(mtd, this->badblock_pattern);  in nand_default_bbt()
1395 int nand_isreserved_bbt(struct mtd_info *mtd, loff_t offs)  in nand_isreserved_bbt()  argument
1397 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_isreserved_bbt()
1410 int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)  in nand_isbad_bbt()  argument
1412 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_isbad_bbt()
1437 int nand_markbad_bbt(struct mtd_info *mtd, loff_t offs)  in nand_markbad_bbt()  argument
1439 	struct nand_chip *this = mtd_to_nand(mtd);  in nand_markbad_bbt()
1449 		ret = nand_update_bbt(mtd, offs);  in nand_markbad_bbt()