84 static u32 bbt_nand_isbad_bypass(struct nand_device *nand, u32 block)  in bbt_nand_isbad_bypass()  argument
86 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in bbt_nand_isbad_bypass()
89 	nanddev_bbt_set_block_status(nand, block, NAND_BBT_BLOCK_STATUS_UNKNOWN);  in bbt_nand_isbad_bypass()
90 	nanddev_offs_to_pos(nand, block * mtd->erasesize, &pos);  in bbt_nand_isbad_bypass()
92 	return nanddev_isbad(nand, &pos);  in bbt_nand_isbad_bypass()
106 static int nanddev_read_bbt(struct nand_device *nand, u32 block, bool update)  in nanddev_read_bbt()  argument
109 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_read_bbt()
111 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_read_bbt()
112 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_read_bbt()
120 	if (!nand->bbt.cache)  in nanddev_read_bbt()
179 	if (update && version > nand->bbt.version) {  in nanddev_read_bbt()
180 		memcpy(nand->bbt.cache, data_buf, nbytes);  in nanddev_read_bbt()
181 		nand->bbt.version = version;  in nanddev_read_bbt()
188 		bool in_scan = nand->bbt.option & NANDDEV_BBT_SCANNED;  in nanddev_read_bbt()
193 		memcpy(temp_buf, nand->bbt.cache, nbytes);  in nanddev_read_bbt()
194 		memcpy(nand->bbt.cache, data_buf, nbytes);  in nanddev_read_bbt()
197 			nand->bbt.option |= NANDDEV_BBT_SCANNED;  in nanddev_read_bbt()
199 			ret = nanddev_bbt_get_block_status(nand, block);  in nanddev_read_bbt()
204 			nand->bbt.option &= ~NANDDEV_BBT_SCANNED;  in nanddev_read_bbt()
205 		memcpy(nand->bbt.cache, temp_buf, nbytes);  in nanddev_read_bbt()
218 static int nanddev_write_bbt(struct nand_device *nand, u32 block)  in nanddev_write_bbt()  argument
221 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_write_bbt()
223 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_write_bbt()
224 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_write_bbt()
232 	bbt_dbg("write_bbt to blk=%d ver=%d\n", block, nand->bbt.version);  in nanddev_write_bbt()
233 	if (!nand->bbt.cache)  in nanddev_write_bbt()
256 	memcpy(data_buf, nand->bbt.cache, nbytes);  in nanddev_write_bbt()
258 	bbt_info->version = nand->bbt.version;  in nanddev_write_bbt()
262 	nanddev_offs_to_pos(nand, block * mtd->erasesize, &pos);  in nanddev_write_bbt()
263 	ret = nand->ops->erase(nand, &pos);  in nanddev_write_bbt()
276 		nand->ops->erase(nand, &pos);  in nanddev_write_bbt()
280 	version = nanddev_read_bbt(nand, block, false);  in nanddev_write_bbt()
284 		nand->ops->erase(nand, &pos);  in nanddev_write_bbt()
296 static __maybe_unused int nanddev_bbt_format(struct nand_device *nand)  in nanddev_bbt_format()  argument
298 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_bbt_format()
299 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_bbt_format()
309 		nanddev_offs_to_pos(nand, block * mtd->erasesize, &pos);  in nanddev_bbt_format()
310 		if (nanddev_isbad(nand, &pos)) {  in nanddev_bbt_format()
311 			if (bbt_nand_isbad_bypass(nand, 0)) {  in nanddev_bbt_format()
312 				memset(nand->bbt.cache, 0, nwords * sizeof(*nand->bbt.cache));  in nanddev_bbt_format()
317 			if (!bbt_nand_isbad_bypass(nand, block)) {  in nanddev_bbt_format()
318 				memset(nand->bbt.cache, 0, nwords * sizeof(*nand->bbt.cache));  in nanddev_bbt_format()
323 			nanddev_bbt_set_block_status(nand, block,  in nanddev_bbt_format()
329 		if (nanddev_bbt_get_block_status(nand, start_block + block) ==  in nanddev_bbt_format()
331 			nanddev_bbt_set_block_status(nand, start_block + block,  in nanddev_bbt_format()
338 static int nanddev_scan_bbt(struct nand_device *nand)  in nanddev_scan_bbt()  argument
340 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_scan_bbt()
344 	nand->bbt.version = 0;  in nanddev_scan_bbt()
347 		nanddev_read_bbt(nand, start_block + block, true);  in nanddev_scan_bbt()
349 	nand->bbt.option |= NANDDEV_BBT_SCANNED;  in nanddev_scan_bbt()
351 	if (nand->bbt.version == 0) {  in nanddev_scan_bbt()
352 		ret = nanddev_bbt_format(nand);  in nanddev_scan_bbt()
354 			nand->bbt.option = 0;  in nanddev_scan_bbt()
360 		ret = nanddev_bbt_update(nand);  in nanddev_scan_bbt()
362 			nand->bbt.option = 0;  in nanddev_scan_bbt()
372 	if (nand->bbt.version) {  in nanddev_scan_bbt()
374 			ret = nanddev_bbt_get_block_status(nand, block);  in nanddev_scan_bbt()
393 int nanddev_bbt_init(struct nand_device *nand)  in nanddev_bbt_init()  argument
396 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_bbt_init()
400 	nand->bbt.cache = kcalloc(nwords, sizeof(*nand->bbt.cache),  in nanddev_bbt_init()
402 	if (!nand->bbt.cache)  in nanddev_bbt_init()
415 void nanddev_bbt_cleanup(struct nand_device *nand)  in nanddev_bbt_cleanup()  argument
417 	kfree(nand->bbt.cache);  in nanddev_bbt_cleanup()
430 int nanddev_bbt_update(struct nand_device *nand)  in nanddev_bbt_update()  argument
434 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_bbt_update()
436 	if (nand->bbt.cache &&  in nanddev_bbt_update()
437 	    nand->bbt.option & NANDDEV_BBT_USE_FLASH) {  in nanddev_bbt_update()
438 		unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_bbt_update()
446 			status = nanddev_bbt_get_block_status(nand, start_block + block);  in nanddev_bbt_update()
447 			ret = nanddev_read_bbt(nand, start_block + block, false);  in nanddev_bbt_update()
468 		if (nand->bbt.version < min_version)  in nanddev_bbt_update()
469 			nand->bbt.version = min_version + 4;  in nanddev_bbt_update()
472 			nand->bbt.version++;  in nanddev_bbt_update()
473 			ret = nanddev_write_bbt(nand, block_des);  in nanddev_bbt_update()
493 				nanddev_offs_to_pos(nand, block_des * mtd->erasesize, &pos);  in nanddev_bbt_update()
494 				nand->ops->erase(nand, &pos);  in nanddev_bbt_update()
513 int nanddev_bbt_get_block_status(const struct nand_device *nand,  in nanddev_bbt_get_block_status()  argument
517 	unsigned long *pos = nand->bbt.cache +  in nanddev_bbt_get_block_status()
523 	if (nand->bbt.option & NANDDEV_BBT_USE_FLASH &&  in nanddev_bbt_get_block_status()
524 	    !(nand->bbt.option & NANDDEV_BBT_SCANNED))  in nanddev_bbt_get_block_status()
525 		nanddev_scan_bbt((struct nand_device *)nand);  in nanddev_bbt_get_block_status()
528 	if (entry >= nanddev_neraseblocks(nand))  in nanddev_bbt_get_block_status()
552 int nanddev_bbt_set_block_status(struct nand_device *nand, unsigned int entry,  in nanddev_bbt_set_block_status()  argument
556 	unsigned long *pos = nand->bbt.cache +  in nanddev_bbt_set_block_status()
561 	if (entry >= nanddev_neraseblocks(nand))  in nanddev_bbt_set_block_status()