24  * ECC4 and ECC1 have 13 bytes and 3 bytes of ecc respectively for 512 bytes of
62  * of OOB size is reserved for ECC, Byte no. 0 & 1 reserved for bad block & 118
97  * ECC placement definitions in oobfree type format
98  * There are 13 bytes of ecc for every 512 byte block and it has to be read
101  * Managing the ecc bytes in the following way makes it easier for software to
102  * read ecc bytes consecutive to data bytes. This way is similar to
196 	/* The calculated ecc is actually the correction index in data */  in fsmc_bch8_correct_data()
209 		 * would result in an ecc error because the oob data is also  in fsmc_bch8_correct_data()
210 		 * erased to FF and the calculated ecc for an FF data is not  in fsmc_bch8_correct_data()
261 			const u_char *data, u_char *ecc)  in fsmc_read_hwecc()  argument
272 			 * Busy waiting for ecc computation  in fsmc_read_hwecc()
280 		ecc[0] = (u_char) (ecc_tmp >> 0);  in fsmc_read_hwecc()
281 		ecc[1] = (u_char) (ecc_tmp >> 8);  in fsmc_read_hwecc()
282 		ecc[2] = (u_char) (ecc_tmp >> 16);  in fsmc_read_hwecc()
283 		ecc[3] = (u_char) (ecc_tmp >> 24);  in fsmc_read_hwecc()
286 		ecc[4] = (u_char) (ecc_tmp >> 0);  in fsmc_read_hwecc()
287 		ecc[5] = (u_char) (ecc_tmp >> 8);  in fsmc_read_hwecc()
288 		ecc[6] = (u_char) (ecc_tmp >> 16);  in fsmc_read_hwecc()
289 		ecc[7] = (u_char) (ecc_tmp >> 24);  in fsmc_read_hwecc()
292 		ecc[8] = (u_char) (ecc_tmp >> 0);  in fsmc_read_hwecc()
293 		ecc[9] = (u_char) (ecc_tmp >> 8);  in fsmc_read_hwecc()
294 		ecc[10] = (u_char) (ecc_tmp >> 16);  in fsmc_read_hwecc()
295 		ecc[11] = (u_char) (ecc_tmp >> 24);  in fsmc_read_hwecc()
298 		ecc[12] = (u_char) (ecc_tmp >> 16);  in fsmc_read_hwecc()
303 		ecc[0] = (u_char) (ecc_tmp >> 0);  in fsmc_read_hwecc()
304 		ecc[1] = (u_char) (ecc_tmp >> 8);  in fsmc_read_hwecc()
305 		ecc[2] = (u_char) (ecc_tmp >> 16);  in fsmc_read_hwecc()
332  * data(512 byte) -> ecc(13 byte)
340 	int i, j, s, stat, eccsize = chip->ecc.size;  in fsmc_read_page_hwecc()
341 	int eccbytes = chip->ecc.bytes;  in fsmc_read_page_hwecc()
342 	int eccsteps = chip->ecc.steps;  in fsmc_read_page_hwecc()
349 	/* Differentiate between small and large page ecc place definitions */  in fsmc_read_page_hwecc()
358 		chip->ecc.hwctl(mtd, NAND_ECC_READ);  in fsmc_read_page_hwecc()
379 		chip->ecc.calculate(mtd, p, &ecc_calc[i]);  in fsmc_read_page_hwecc()
381 		stat = chip->ecc.correct(mtd, p, &ecc_code[i],  in fsmc_read_page_hwecc()
394  * fsmc_nand_switch_ecc - switch the ECC operation between different engines
407 	 * 1 bit HW ECC. The BCH8 HW ECC (FSMC_VER8) from the ST-Ericsson  in fsmc_nand_switch_ecc()
409 	 * function, as it doesn't need to switch to a different ECC layout.  in fsmc_nand_switch_ecc()
414 	/* Setup the ecc configurations again */  in fsmc_nand_switch_ecc()
416 		nand->ecc.mode = NAND_ECC_HW;  in fsmc_nand_switch_ecc()
417 		nand->ecc.bytes = 3;  in fsmc_nand_switch_ecc()
418 		nand->ecc.strength = 1;  in fsmc_nand_switch_ecc()
419 		nand->ecc.layout = &fsmc_ecc1_layout;  in fsmc_nand_switch_ecc()
420 		nand->ecc.calculate = fsmc_read_hwecc;  in fsmc_nand_switch_ecc()
421 		nand->ecc.correct = nand_correct_data;  in fsmc_nand_switch_ecc()
427 		nand->ecc.mode = NAND_ECC_SOFT_BCH;  in fsmc_nand_switch_ecc()
428 		nand->ecc.strength = 4;  in fsmc_nand_switch_ecc()
429 		nand->ecc.layout = NULL;  in fsmc_nand_switch_ecc()
431 		printf("Error: ECC strength %d not supported!\n", eccstrength);  in fsmc_nand_switch_ecc()
434 	/* Update NAND handling after ECC mode switch */  in fsmc_nand_switch_ecc()
472 	nand->ecc.mode = NAND_ECC_HW;  in fsmc_nand_init()
473 	nand->ecc.size = 512;  in fsmc_nand_init()
474 	nand->ecc.calculate = fsmc_read_hwecc;  in fsmc_nand_init()
475 	nand->ecc.hwctl = fsmc_enable_hwecc;  in fsmc_nand_init()
485 		nand->ecc.bytes = 13;  in fsmc_nand_init()
486 		nand->ecc.strength = 8;  in fsmc_nand_init()
487 		nand->ecc.correct = fsmc_bch8_correct_data;  in fsmc_nand_init()
488 		nand->ecc.read_page = fsmc_read_page_hwecc;  in fsmc_nand_init()
490 			nand->ecc.layout = &fsmc_ecc4_sp_layout;  in fsmc_nand_init()
493 				nand->ecc.layout = &fsmc_ecc4_224_layout;  in fsmc_nand_init()
495 				nand->ecc.layout = &fsmc_ecc4_lp_layout;  in fsmc_nand_init()
500 		nand->ecc.bytes = 3;  in fsmc_nand_init()
501 		nand->ecc.strength = 1;  in fsmc_nand_init()
502 		nand->ecc.layout = &fsmc_ecc1_layout;  in fsmc_nand_init()
503 		nand->ecc.correct = nand_correct_data;  in fsmc_nand_init()