33  * @nand: NAND device
42 static int nanddev_read_bbt(struct snand_mtd_dev *nand, u32 block, bool update)  in nanddev_read_bbt()  argument
45 	unsigned int nblocks = snanddev_neraseblocks(nand);  in nanddev_read_bbt()
47 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_read_bbt()
48 	struct mtd_info *mtd = snanddev_to_mtd(nand);  in nanddev_read_bbt()
57 	if (!nand->bbt.cache)  in nanddev_read_bbt()
114 	if (update && version > nand->bbt.version) {  in nanddev_read_bbt()
115 		memcpy(nand->bbt.cache, data_buf, nbytes);  in nanddev_read_bbt()
116 		nand->bbt.version = version;  in nanddev_read_bbt()
126 static int nanddev_write_bbt(struct snand_mtd_dev *nand, u32 block)  in nanddev_write_bbt()  argument
129 	unsigned int nblocks = snanddev_neraseblocks(nand);  in nanddev_write_bbt()
131 					   BITS_PER_LONG) * sizeof(*nand->bbt.cache);  in nanddev_write_bbt()
132 	struct mtd_info *mtd = snanddev_to_mtd(nand);  in nanddev_write_bbt()
140 	BBT_DBG("write_bbt to blk=%d ver=%d\n", block, nand->bbt.version);  in nanddev_write_bbt()
141 	if (!nand->bbt.cache)  in nanddev_write_bbt()
164 	memcpy(data_buf, nand->bbt.cache, nbytes);  in nanddev_write_bbt()
166 	bbt_info->version = nand->bbt.version;  in nanddev_write_bbt()
209 static int nanddev_bbt_format(struct snand_mtd_dev *nand)  in nanddev_bbt_format()  argument
211 	unsigned int nblocks = snanddev_neraseblocks(nand);  in nanddev_bbt_format()
212 	struct mtd_info *mtd = snanddev_to_mtd(nand);  in nanddev_bbt_format()
219 			snanddev_bbt_set_block_status(nand, block,  in nanddev_bbt_format()
224 		if (snanddev_bbt_get_block_status(nand, start_block + block) ==  in nanddev_bbt_format()
226 			snanddev_bbt_set_block_status(nand, start_block + block,  in nanddev_bbt_format()
233 static int nanddev_scan_bbt(struct snand_mtd_dev *nand)  in nanddev_scan_bbt()  argument
235 	unsigned int nblocks = snanddev_neraseblocks(nand);  in nanddev_scan_bbt()
239 	nand->bbt.version = 0;  in nanddev_scan_bbt()
242 		nanddev_read_bbt(nand, start_block + block, true);  in nanddev_scan_bbt()
244 	nand->bbt.option |= NANDDEV_BBT_SCANNED;  in nanddev_scan_bbt()
245 	if (nand->bbt.version == 0) {  in nanddev_scan_bbt()
246 		nanddev_bbt_format(nand);  in nanddev_scan_bbt()
247 		ret = snanddev_bbt_update(nand);  in nanddev_scan_bbt()
249 			nand->bbt.option = 0;  in nanddev_scan_bbt()
261  * @nand: NAND device
267 int snanddev_bbt_init(struct snand_mtd_dev *nand)  in snanddev_bbt_init()  argument
270 	unsigned int nblocks = snanddev_neraseblocks(nand);  in snanddev_bbt_init()
274 	nand->bbt.cache = kcalloc(nwords, sizeof(*nand->bbt.cache),  in snanddev_bbt_init()
276 	if (!nand->bbt.cache)  in snanddev_bbt_init()
285  * @nand: NAND device
289 void snanddev_bbt_cleanup(struct snand_mtd_dev *nand)  in snanddev_bbt_cleanup()  argument
291 	kfree(nand->bbt.cache);  in snanddev_bbt_cleanup()
297  * @nand: nand device
304 int snanddev_bbt_update(struct snand_mtd_dev *nand)  in snanddev_bbt_update()  argument
307 	if (nand->bbt.cache &&  in snanddev_bbt_update()
308 	    nand->bbt.option & NANDDEV_BBT_USE_FLASH) {  in snanddev_bbt_update()
309 		unsigned int nblocks = snanddev_neraseblocks(nand);  in snanddev_bbt_update()
317 			ret = snanddev_bbt_get_block_status(nand, start_block + block);  in snanddev_bbt_update()
322 			ret = nanddev_read_bbt(nand, start_block + block,  in snanddev_bbt_update()
342 			nand->bbt.version++;  in snanddev_bbt_update()
343 			ret = nanddev_write_bbt(nand, block_des);  in snanddev_bbt_update()
368  * @nand: nand device
374 int snanddev_bbt_get_block_status(const struct snand_mtd_dev *nand,  in snanddev_bbt_get_block_status()  argument
378 	unsigned long *pos = nand->bbt.cache +  in snanddev_bbt_get_block_status()
384 	if (nand->bbt.option & NANDDEV_BBT_USE_FLASH &&  in snanddev_bbt_get_block_status()
385 	    !(nand->bbt.option & NANDDEV_BBT_SCANNED))  in snanddev_bbt_get_block_status()
386 		nanddev_scan_bbt((struct snand_mtd_dev *)nand);  in snanddev_bbt_get_block_status()
389 	if (entry >= snanddev_neraseblocks(nand))  in snanddev_bbt_get_block_status()
403  * @nand: nand device
408  * the NAND you should call nanddev_bbt_update().
413 int snanddev_bbt_set_block_status(struct snand_mtd_dev *nand,  in snanddev_bbt_set_block_status()  argument
418 	unsigned long *pos = nand->bbt.cache +  in snanddev_bbt_set_block_status()
423 	if (entry >= snanddev_neraseblocks(nand))  in snanddev_bbt_set_block_status()