8 #include <linux/mtd/nand.h>
19  * It can run for arbitrary NAND flash chips with different block and OOB sizes. Currently there
20  * are only two known devices in the wild that have NAND flash and make use of this ECC engine
99 static inline void *nand_to_ctx(struct nand_device *nand)  in nand_to_ctx()  argument
101 	return nand->ecc.ctx.priv;  in nand_to_ctx()
104 static inline struct rtl_ecc_engine *nand_to_rtlc(struct nand_device *nand)  in nand_to_rtlc()  argument
106 	struct nand_ecc_engine *eng = nand->ecc.engine;  in nand_to_rtlc()
114 	struct nand_device *nand = mtd_to_nanddev(mtd);  in rtl_ecc_ooblayout_ecc()  local
115 	struct rtl_ecc_ctx *ctx = nand_to_ctx(nand);  in rtl_ecc_ooblayout_ecc()
129 	struct nand_device *nand = mtd_to_nanddev(mtd);  in rtl_ecc_ooblayout_free()  local
130 	struct rtl_ecc_ctx *ctx = nand_to_ctx(nand);  in rtl_ecc_ooblayout_free()
169 	 * and 6 free bytes. In case the NAND area has been erased and all data and oob is  in rtl_ecc_wait_for_engine()
222 static int rtl_ecc_prepare_io_req(struct nand_device *nand, struct nand_page_io_req *req)  in rtl_ecc_prepare_io_req()  argument
224 	struct rtl_ecc_engine *rtlc = nand_to_rtlc(nand);  in rtl_ecc_prepare_io_req()
225 	struct rtl_ecc_ctx *ctx = nand_to_ctx(nand);  in rtl_ecc_prepare_io_req()
255 static int rtl_ecc_finish_io_req(struct nand_device *nand, struct nand_page_io_req *req)  in rtl_ecc_finish_io_req()  argument
257 	struct rtl_ecc_engine *rtlc = nand_to_rtlc(nand);  in rtl_ecc_finish_io_req()
258 	struct rtl_ecc_ctx *ctx = nand_to_ctx(nand);  in rtl_ecc_finish_io_req()
259 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in rtl_ecc_finish_io_req()
308 static int rtl_ecc_check_support(struct nand_device *nand)  in rtl_ecc_check_support()  argument
310 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in rtl_ecc_check_support()
311 	struct device *dev = nand->ecc.engine->dev;  in rtl_ecc_check_support()
320 	if (nand->ecc.user_conf.algo != NAND_ECC_ALGO_BCH ||  in rtl_ecc_check_support()
321 	    nand->ecc.user_conf.strength != RTL_ECC_ALLOWED_STRENGTH ||  in rtl_ecc_check_support()
322 	    nand->ecc.user_conf.placement != NAND_ECC_PLACEMENT_OOB ||  in rtl_ecc_check_support()
323 	    nand->ecc.user_conf.step_size != RTL_ECC_BLOCK_SIZE) {  in rtl_ecc_check_support()
332 static int rtl_ecc_init_ctx(struct nand_device *nand)  in rtl_ecc_init_ctx()  argument
334 	struct nand_ecc_props *conf = &nand->ecc.ctx.conf;  in rtl_ecc_init_ctx()
335 	struct rtl_ecc_engine *rtlc = nand_to_rtlc(nand);  in rtl_ecc_init_ctx()
336 	struct mtd_info *mtd = nanddev_to_mtd(nand);  in rtl_ecc_init_ctx()
337 	int strength = nand->ecc.user_conf.strength;  in rtl_ecc_init_ctx()
338 	struct device *dev = nand->ecc.engine->dev;  in rtl_ecc_init_ctx()
342 	ret = rtl_ecc_check_support(nand);  in rtl_ecc_init_ctx()
350 	nand->ecc.ctx.priv = ctx;  in rtl_ecc_init_ctx()
364 	ret = nand_ecc_init_req_tweaking(&ctx->req_ctx, nand);  in rtl_ecc_init_ctx()
375 static void rtl_ecc_cleanup_ctx(struct nand_device *nand)  in rtl_ecc_cleanup_ctx()  argument
377 	struct rtl_ecc_ctx *ctx = nand_to_ctx(nand);  in rtl_ecc_cleanup_ctx()
454 		.name = "rtl-nand-ecc-engine",
464 MODULE_DESCRIPTION("Realtek NAND hardware ECC controller");