10 #define pr_fmt(fmt)	"nand: " fmt
13 #include <linux/mtd/nand.h>
17  * @nand: NAND device
22 bool nanddev_isbad(struct nand_device *nand, const struct nand_pos *pos)  in nanddev_isbad()  argument
24 	if (nanddev_bbt_is_initialized(nand)) {  in nanddev_isbad()
28 		entry = nanddev_bbt_pos_to_entry(nand, pos);  in nanddev_isbad()
29 		status = nanddev_bbt_get_block_status(nand, entry);  in nanddev_isbad()
32 			if (nand->ops->isbad(nand, pos))  in nanddev_isbad()
37 			nanddev_bbt_set_block_status(nand, entry, status);  in nanddev_isbad()
47 	return nand->ops->isbad(nand, pos);  in nanddev_isbad()
53  * @nand: NAND device
57  * calls the low-level markbad hook (nand->ops->markbad()).
61 int nanddev_markbad(struct nand_device *nand, const struct nand_pos *pos)  in nanddev_markbad()  argument
63 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_markbad()
67 	if (nanddev_isbad(nand, pos))  in nanddev_markbad()
70 	ret = nand->ops->markbad(nand, pos);  in nanddev_markbad()
73 			nanddev_pos_to_offs(nand, pos), ret);  in nanddev_markbad()
75 	if (!nanddev_bbt_is_initialized(nand))  in nanddev_markbad()
78 	entry = nanddev_bbt_pos_to_entry(nand, pos);  in nanddev_markbad()
79 	ret = nanddev_bbt_set_block_status(nand, entry, NAND_BBT_BLOCK_WORN);  in nanddev_markbad()
83 	ret = nanddev_bbt_update(nand);  in nanddev_markbad()
95  * @nand: NAND device
96  * @pos: NAND position to test
102 bool nanddev_isreserved(struct nand_device *nand, const struct nand_pos *pos)  in nanddev_isreserved()  argument
107 	if (!nanddev_bbt_is_initialized(nand))  in nanddev_isreserved()
111 	entry = nanddev_bbt_pos_to_entry(nand, pos);  in nanddev_isreserved()
112 	status = nanddev_bbt_get_block_status(nand, entry);  in nanddev_isreserved()
118  * nanddev_erase() - Erase a NAND portion
119  * @nand: NAND device
126 int nanddev_erase(struct nand_device *nand, const struct nand_pos *pos)  in nanddev_erase()  argument
128 	if (nanddev_isbad(nand, pos) || nanddev_isreserved(nand, pos)) {  in nanddev_erase()
130 			nanddev_pos_to_offs(nand, pos));  in nanddev_erase()
134 	return nand->ops->erase(nand, pos);  in nanddev_erase()
139  * nanddev_mtd_erase() - Generic mtd->_erase() implementation for NAND devices
144  * concerned by @einfo and calling nand->ops->erase() on each of them.
147  * because there's no locking here. NAND specialized layers should instead
155 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nanddev_mtd_erase()  local
159 	nanddev_offs_to_pos(nand, einfo->addr, &pos);  in nanddev_mtd_erase()
160 	nanddev_offs_to_pos(nand, einfo->addr + einfo->len - 1, &last);  in nanddev_mtd_erase()
162 		ret = nanddev_erase(nand, &pos);  in nanddev_mtd_erase()
164 			einfo->fail_addr = nanddev_pos_to_offs(nand, &pos);  in nanddev_mtd_erase()
169 		nanddev_pos_next_eraseblock(nand, &pos);  in nanddev_mtd_erase()
178  *				  a specific region of the NAND device
180  * @offs: offset of the NAND region
181  * @len: length of the NAND region
184  * nand->memorg.max_bad_eraseblocks_per_lun is > 0.
191 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nanddev_mtd_max_bad_blocks()  local
195 	if (!nand->memorg.max_bad_eraseblocks_per_lun)  in nanddev_mtd_max_bad_blocks()
198 	nanddev_offs_to_pos(nand, offs, &pos);  in nanddev_mtd_max_bad_blocks()
199 	nanddev_offs_to_pos(nand, offs + len, &end);  in nanddev_mtd_max_bad_blocks()
201 	for (nanddev_offs_to_pos(nand, offs, &pos);  in nanddev_mtd_max_bad_blocks()
203 	     nanddev_pos_next_lun(nand, &pos))  in nanddev_mtd_max_bad_blocks()
204 		max_bb += nand->memorg.max_bad_eraseblocks_per_lun;  in nanddev_mtd_max_bad_blocks()
212  * @nand: NAND device
214 static int nanddev_get_ecc_engine(struct nand_device *nand)  in nanddev_get_ecc_engine()  argument
219 	of_get_nand_ecc_user_config(nand);  in nanddev_get_ecc_engine()
221 	engine_type = nand->ecc.user_conf.engine_type;  in nanddev_get_ecc_engine()
223 		engine_type = nand->ecc.defaults.engine_type;  in nanddev_get_ecc_engine()
229 		nand->ecc.engine = nand_ecc_get_sw_engine(nand);  in nanddev_get_ecc_engine()
232 		nand->ecc.engine = nand_ecc_get_on_die_hw_engine(nand);  in nanddev_get_ecc_engine()
241 	if (!nand->ecc.engine)  in nanddev_get_ecc_engine()
249  * @nand: NAND device
251 static int nanddev_put_ecc_engine(struct nand_device *nand)  in nanddev_put_ecc_engine()  argument
253 	switch (nand->ecc.ctx.conf.engine_type) {  in nanddev_put_ecc_engine()
269  * @nand: NAND device
271 static int nanddev_find_ecc_configuration(struct nand_device *nand)  in nanddev_find_ecc_configuration()  argument
275 	if (!nand->ecc.engine)  in nanddev_find_ecc_configuration()
278 	ret = nand_ecc_init_ctx(nand);  in nanddev_find_ecc_configuration()
282 	if (!nand_ecc_is_strong_enough(nand))  in nanddev_find_ecc_configuration()
283 …NING: %s: the ECC used on your system is too weak compared to the one required by the NAND chip\n",  in nanddev_find_ecc_configuration()
284 			nand->mtd.name);  in nanddev_find_ecc_configuration()
291  * @nand: NAND device
293 int nanddev_ecc_engine_init(struct nand_device *nand)  in nanddev_ecc_engine_init()  argument
298 	ret = nanddev_get_ecc_engine(nand);  in nanddev_ecc_engine_init()
305 	if (!nand->ecc.engine)  in nanddev_ecc_engine_init()
309 	ret = nanddev_find_ecc_configuration(nand);  in nanddev_ecc_engine_init()
312 		nanddev_put_ecc_engine(nand);  in nanddev_ecc_engine_init()
323  * @nand: NAND device
325 void nanddev_ecc_engine_cleanup(struct nand_device *nand)  in nanddev_ecc_engine_cleanup()  argument
327 	if (nand->ecc.engine)  in nanddev_ecc_engine_cleanup()
328 		nand_ecc_cleanup_ctx(nand);  in nanddev_ecc_engine_cleanup()
330 	nanddev_put_ecc_engine(nand);  in nanddev_ecc_engine_cleanup()
335  * nanddev_init() - Initialize a NAND device
336  * @nand: NAND device
337  * @ops: NAND device operations
338  * @owner: NAND device owner
340  * Initializes a NAND device object. Consistency checks are done on @ops and
341  * @nand->memorg. Also takes care of initializing the BBT.
345 int nanddev_init(struct nand_device *nand, const struct nand_ops *ops,  in nanddev_init()  argument
348 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nanddev_init()
349 	struct nand_memory_organization *memorg = nanddev_get_memorg(nand);  in nanddev_init()
351 	if (!nand || !ops)  in nanddev_init()
363 	nand->rowconv.eraseblock_addr_shift =  in nanddev_init()
365 	nand->rowconv.lun_addr_shift = fls(memorg->eraseblocks_per_lun - 1) +  in nanddev_init()
366 				       nand->rowconv.eraseblock_addr_shift;  in nanddev_init()
368 	nand->ops = ops;  in nanddev_init()
377 	mtd->size = nanddev_size(nand);  in nanddev_init()
380 	return nanddev_bbt_init(nand);  in nanddev_init()
386  * @nand: NAND device
390 void nanddev_cleanup(struct nand_device *nand)  in nanddev_cleanup()  argument
392 	if (nanddev_bbt_is_initialized(nand))  in nanddev_cleanup()
393 		nanddev_bbt_cleanup(nand);  in nanddev_cleanup()
397 MODULE_DESCRIPTION("Generic NAND framework");