10  * This file describes the abstraction of any NAND ECC engine. It has been
15  *   - external: The ECC engine is outside the NAND pipeline, typically this
17  *               outside the NAND controller pipeline.
18  *   - pipelined: The ECC engine is inside the NAND pipeline, ie. on the
19  *                controller's side. This is the case of most of the raw NAND
23  *   - ondie: The ECC engine is inside the NAND pipeline, on the chip's side.
24  *            Some NAND chips can correct themselves the data.
44  *   - read: Load data from the NAND chip
45  *   - write: Store data in the NAND chip
97 #include <linux/mtd/nand.h>
101  * @nand: the NAND device
105 int nand_ecc_init_ctx(struct nand_device *nand)  in nand_ecc_init_ctx()  argument
107 	if (!nand->ecc.engine->ops->init_ctx)  in nand_ecc_init_ctx()
110 	return nand->ecc.engine->ops->init_ctx(nand);  in nand_ecc_init_ctx()
116  * @nand: the NAND device
118 void nand_ecc_cleanup_ctx(struct nand_device *nand)  in nand_ecc_cleanup_ctx()  argument
120 	if (nand->ecc.engine->ops->cleanup_ctx)  in nand_ecc_cleanup_ctx()
121 		nand->ecc.engine->ops->cleanup_ctx(nand);  in nand_ecc_cleanup_ctx()
127  * @nand: the NAND device
130 int nand_ecc_prepare_io_req(struct nand_device *nand,  in nand_ecc_prepare_io_req()  argument
133 	if (!nand->ecc.engine->ops->prepare_io_req)  in nand_ecc_prepare_io_req()
136 	return nand->ecc.engine->ops->prepare_io_req(nand, req);  in nand_ecc_prepare_io_req()
142  * @nand: the NAND device
145 int nand_ecc_finish_io_req(struct nand_device *nand,  in nand_ecc_finish_io_req()  argument
148 	if (!nand->ecc.engine->ops->finish_io_req)  in nand_ecc_finish_io_req()
151 	return nand->ecc.engine->ops->finish_io_req(nand, req);  in nand_ecc_finish_io_req()
159 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nand_ooblayout_ecc_sp()  local
160 	unsigned int total_ecc_bytes = nand->ecc.ctx.total;  in nand_ooblayout_ecc_sp()
219 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nand_ooblayout_ecc_lp()  local
220 	unsigned int total_ecc_bytes = nand->ecc.ctx.total;  in nand_ooblayout_ecc_lp()
234 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nand_ooblayout_free_lp()  local
235 	unsigned int total_ecc_bytes = nand->ecc.ctx.total;  in nand_ooblayout_free_lp()
264 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nand_ooblayout_ecc_lp_hamming()  local
265 	unsigned int total_ecc_bytes = nand->ecc.ctx.total;  in nand_ooblayout_ecc_lp_hamming()
291 	struct nand_device *nand = mtd_to_nanddev(mtd);  in nand_ooblayout_free_lp_hamming()  local
292 	unsigned int total_ecc_bytes = nand->ecc.ctx.total;  in nand_ooblayout_free_lp_hamming()
336 	if (of_property_read_bool(np, "nand-no-ecc-engine"))  in of_get_nand_ecc_engine_type()
339 	if (of_property_read_bool(np, "nand-use-soft-ecc-engine"))  in of_get_nand_ecc_engine_type()
342 	eng_np = of_parse_phandle(np, "nand-ecc-engine", 0);  in of_get_nand_ecc_engine_type()
366 	err = of_property_read_string(np, "nand-ecc-placement", &pm);  in of_get_nand_ecc_placement()
390 	err = of_property_read_string(np, "nand-ecc-algo", &pm);  in of_get_nand_ecc_algo()
408 	ret = of_property_read_u32(np, "nand-ecc-step-size", &val);  in of_get_nand_ecc_step_size()
417 	ret = of_property_read_u32(np, "nand-ecc-strength", &val);  in of_get_nand_ecc_strength()
421 void of_get_nand_ecc_user_config(struct nand_device *nand)  in of_get_nand_ecc_user_config()  argument
423 	struct device_node *dn = nanddev_get_of_node(nand);  in of_get_nand_ecc_user_config()
426 	nand->ecc.user_conf.engine_type = of_get_nand_ecc_engine_type(dn);  in of_get_nand_ecc_user_config()
427 	nand->ecc.user_conf.algo = of_get_nand_ecc_algo(dn);  in of_get_nand_ecc_user_config()
428 	nand->ecc.user_conf.placement = of_get_nand_ecc_placement(dn);  in of_get_nand_ecc_user_config()
432 		nand->ecc.user_conf.strength = strength;  in of_get_nand_ecc_user_config()
436 		nand->ecc.user_conf.step_size = size;  in of_get_nand_ecc_user_config()
438 	if (of_property_read_bool(dn, "nand-ecc-maximize"))  in of_get_nand_ecc_user_config()
439 		nand->ecc.user_conf.flags |= NAND_ECC_MAXIMIZE_STRENGTH;  in of_get_nand_ecc_user_config()
447  * @nand: Device to check
460 bool nand_ecc_is_strong_enough(struct nand_device *nand)  in nand_ecc_is_strong_enough()  argument
462 	const struct nand_ecc_props *reqs = nanddev_get_ecc_requirements(nand);  in nand_ecc_is_strong_enough()
463 	const struct nand_ecc_props *conf = nanddev_get_ecc_conf(nand);  in nand_ecc_is_strong_enough()
464 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in nand_ecc_is_strong_enough()