nand/raw/mxc_nand.c

40 /* Macros to get byte and bit positions of ECC */
48 /* OOB placement block for use with hardware ecc generation */
377 	 * If HW ECC is enabled, we turn it on during init. There is
390 	int eccpitch = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
398 	for (i = 0; i < chip->ecc.steps; i++) {
399 		toread = min_t(int, length, chip->ecc.prepad);
405 		bufpoi += chip->ecc.bytes;
406 		host->col_addr += chip->ecc.bytes;
407 		length -= chip->ecc.bytes;
409 		toread = min_t(int, length, chip->ecc.postpad);
421 			mtd->writesize + chip->ecc.prepad, page);
422 	bufpoi = buf + chip->ecc.prepad;
423 	length = mtd->oobsize - chip->ecc.prepad;
424 	for (i = 0; i < chip->ecc.steps; i++) {
425 		toread = min_t(int, length, chip->ecc.bytes);
429 		host->col_addr += chip->ecc.postpad + chip->ecc.prepad;
442 	int eccsize = chip->ecc.size;
443 	int eccbytes = chip->ecc.bytes;
444 	int eccpitch = eccbytes + chip->ecc.prepad + chip->ecc.postpad;
452 	for (n = 0, steps = chip->ecc.steps; steps > 0; n++, steps--) {
458 		if (chip->ecc.prepad) {
459 			chip->read_buf(mtd, oob, chip->ecc.prepad);
460 			oob += chip->ecc.prepad;
466 		if (chip->ecc.postpad) {
467 			chip->read_buf(mtd, oob, chip->ecc.postpad);
468 			oob += chip->ecc.postpad;
487 	int n, eccsize = chip->ecc.size;
488 	int eccbytes = chip->ecc.bytes;
489 	int eccpitch = eccbytes + chip->ecc.prepad + chip->ecc.postpad;
490 	int eccsteps = chip->ecc.steps;
507 		if (chip->ecc.prepad) {
508 			chip->read_buf(mtd, oob, chip->ecc.prepad);
509 			oob += chip->ecc.prepad;
512 		stat = chip->ecc.correct(mtd, p, oob, NULL);
520 		if (chip->ecc.postpad) {
521 			chip->read_buf(mtd, oob, chip->ecc.postpad);
522 			oob += chip->ecc.postpad;
531 	/* Then switch ECC off and read the OOB area to get the ECC code */
534 	eccsteps = chip->ecc.steps;
535 	oob = chip->oob_poi + chip->ecc.prepad;
539 				 chip->ecc.prepad;
541 		oob += eccbytes + chip->ecc.postpad;
551 	int eccpitch = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
553 	int i, len, status, steps = chip->ecc.steps;
563 		host->col_addr += chip->ecc.prepad + chip->ecc.postpad;
579 	int eccsize = chip->ecc.size;
580 	int eccbytes = chip->ecc.bytes;
581 	int eccpitch = eccbytes + chip->ecc.prepad + chip->ecc.postpad;
586 	for (n = 0, steps = chip->ecc.steps; steps > 0; n++, steps--) {
593 		if (chip->ecc.prepad) {
594 			chip->write_buf(mtd, oob, chip->ecc.prepad);
595 			oob += chip->ecc.prepad;
601 		if (chip->ecc.postpad) {
602 			chip->write_buf(mtd, oob, chip->ecc.postpad);
603 			oob += chip->ecc.postpad;
619 	int i, n, eccsize = chip->ecc.size;
620 	int eccbytes = chip->ecc.bytes;
621 	int eccpitch = eccbytes + chip->ecc.prepad + chip->ecc.postpad;
622 	int eccsteps = chip->ecc.steps;
626 	chip->ecc.hwctl(mtd, NAND_ECC_WRITE);
637 		if (chip->ecc.prepad) {
638 			chip->write_buf(mtd, oob, chip->ecc.prepad);
639 			oob += chip->ecc.prepad;
645 		if (chip->ecc.postpad) {
646 			chip->write_buf(mtd, oob, chip->ecc.postpad);
647 			oob += chip->ecc.postpad;
675 				       "MXC_NAND: HWECC uncorrectable ECC error"
706 	 * HW ECC, so we need to return failure
711 		pr_debug("MXC_NAND: HWECC uncorrectable 2-bit ECC error\n");
1012 			 * partial write. It always sends out 512+ecc+512+ecc
1181 	this->ecc.calculate = mxc_nand_calculate_ecc;
1182 	this->ecc.hwctl = mxc_nand_enable_hwecc;
1183 	this->ecc.correct = mxc_nand_correct_data;
1185 		this->ecc.mode = NAND_ECC_HW_SYNDROME;
1186 		this->ecc.read_page = mxc_nand_read_page_syndrome;
1187 		this->ecc.read_page_raw = mxc_nand_read_page_raw_syndrome;
1188 		this->ecc.read_oob = mxc_nand_read_oob_syndrome;
1189 		this->ecc.write_page = mxc_nand_write_page_syndrome;
1190 		this->ecc.write_page_raw = mxc_nand_write_page_raw_syndrome;
1191 		this->ecc.write_oob = mxc_nand_write_oob_syndrome;
1192 		this->ecc.bytes = 9;
1193 		this->ecc.prepad = 7;
1195 		this->ecc.mode = NAND_ECC_HW;
1199 		this->ecc.strength = 1;
1201 		this->ecc.strength = 4;
1205 	this->ecc.size = 512;
1208 	this->ecc.layout = &nand_soft_eccoob;
1209 	this->ecc.mode = NAND_ECC_SOFT;
1221 	this->ecc.layout = &nand_hw_eccoob2k;
1224 	this->ecc.layout = &nand_hw_eccoob;