23 static int nanddev_read_bbt(struct nand_device *nand, u32 block, bool update)  in nanddev_read_bbt()  argument
26 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_read_bbt()
28 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_read_bbt()
29 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_read_bbt()
37 	if (!nand->bbt.cache)  in nanddev_read_bbt()
80 	if (update && version > nand->bbt.version) {  in nanddev_read_bbt()
81 		memcpy(nand->bbt.cache, data_buf, nbytes);  in nanddev_read_bbt()
82 		nand->bbt.version = version;  in nanddev_read_bbt()
92 static int nanddev_write_bbt(struct nand_device *nand, u32 block)  in nanddev_write_bbt()  argument
95 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_write_bbt()
97 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_write_bbt()
98 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_write_bbt()
106 	BBT_DBG("write_bbt to blk=%d ver=%d\n", block, nand->bbt.version);  in nanddev_write_bbt()
107 	if (!nand->bbt.cache)  in nanddev_write_bbt()
130 	memcpy(data_buf, nand->bbt.cache, nbytes);  in nanddev_write_bbt()
132 	bbt_info->version = nand->bbt.version;  in nanddev_write_bbt()
134 	nanddev_offs_to_pos(nand, block * mtd->erasesize, &pos);  in nanddev_write_bbt()
135 	ret = nand->ops->erase(nand, &pos);  in nanddev_write_bbt()
155 static int nanddev_bbt_format(struct nand_device *nand)  in nanddev_bbt_format()  argument
157 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_bbt_format()
158 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_bbt_format()
165 		nanddev_offs_to_pos(nand, block * mtd->erasesize, &pos);  in nanddev_bbt_format()
166 		if (nanddev_isbad(nand, &pos))  in nanddev_bbt_format()
167 			nanddev_bbt_set_block_status(nand, block,  in nanddev_bbt_format()
172 		if (nanddev_bbt_get_block_status(nand, start_block + block) ==  in nanddev_bbt_format()
174 			nanddev_bbt_set_block_status(nand, start_block + block,  in nanddev_bbt_format()
183  * @nand: nand device
189 int nanddev_scan_bbt_in_flash(struct nand_device *nand)  in nanddev_scan_bbt_in_flash()  argument
191 	unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_scan_bbt_in_flash()
195 	nand->bbt.version = 0;  in nanddev_scan_bbt_in_flash()
198 		nanddev_read_bbt(nand, start_block + block, true);  in nanddev_scan_bbt_in_flash()
200 	if (nand->bbt.version == 0) {  in nanddev_scan_bbt_in_flash()
201 		nanddev_bbt_format(nand);  in nanddev_scan_bbt_in_flash()
202 		ret = nanddev_bbt_in_flash_update(nand);  in nanddev_scan_bbt_in_flash()
204 			nand->bbt.option = 0;  in nanddev_scan_bbt_in_flash()
209 	nand->bbt.option |= NANDDEV_BBT_SCANNED;  in nanddev_scan_bbt_in_flash()
217  * @nand: nand device
223 int nanddev_bbt_in_flash_update(struct nand_device *nand)  in nanddev_bbt_in_flash_update()  argument
225 	if (nand->bbt.option & NANDDEV_BBT_SCANNED) {  in nanddev_bbt_in_flash_update()
226 		unsigned int nblocks = nanddev_neraseblocks(nand);  in nanddev_bbt_in_flash_update()
234 			ret = nanddev_bbt_get_block_status(nand, start_block + block);  in nanddev_bbt_in_flash_update()
239 			ret = nanddev_read_bbt(nand, start_block + block,  in nanddev_bbt_in_flash_update()
259 			nand->bbt.version++;  in nanddev_bbt_in_flash_update()
260 			ret = nanddev_write_bbt(nand, block_des);  in nanddev_bbt_in_flash_update()