+ case OMAP_ECC_BCH16_CODE_HW:
+#ifdef CONFIG_NAND_OMAP_ELM
+ debug("nand: using OMAP_ECC_BCH16_CODE_HW\n");
+ /* check ecc-scheme requirements before updating ecc info */
+ if ((26 * eccsteps) + BADBLOCK_MARKER_LENGTH > oobsize) {
+ printf("nand: error: insufficient OOB: require=%d\n", (
+ (26 * eccsteps) + BADBLOCK_MARKER_LENGTH));
+ return -EINVAL;
+ }
+ /* intialize ELM for ECC error detection */
+ elm_init();
+ /* populate ecc specific fields */
+ nand->ecc.mode = NAND_ECC_HW;
+ nand->ecc.size = SECTOR_BYTES;
+ nand->ecc.bytes = 26;
+ nand->ecc.strength = 16;
+ nand->ecc.hwctl = omap_enable_hwecc;
+ nand->ecc.correct = omap_correct_data_bch;
+ nand->ecc.calculate = omap_calculate_ecc;
+ nand->ecc.read_page = omap_read_page_bch;
+ /* define ecc-layout */
+ ecclayout->eccbytes = nand->ecc.bytes * eccsteps;
+ for (i = 0; i < ecclayout->eccbytes; i++)
+ ecclayout->eccpos[i] = i + BADBLOCK_MARKER_LENGTH;
+ ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH;
+ ecclayout->oobfree[0].length = oobsize - nand->ecc.bytes -
+ BADBLOCK_MARKER_LENGTH;
+ break;
+#else
+ printf("nand: error: CONFIG_NAND_OMAP_ELM required for ECC\n");
+ return -EINVAL;
+#endif