[PATCH v2] mtd: eLBC NAND: update ecc_stats.corrected when lteccr available
From: Michael Hench <hidden>
Date: 2011-07-26 18:59:29
update ecc_stats.corrected if LTECCR register is available. v2: kernel standard C formatting Signed-off-by: Michael Hench <redacted> --- diff -purN orig/drivers/mtd/nand/fsl_elbc_nand.c linux-3.0/drivers/mtd/nand/fsl_elbc_nand.c
--- orig/drivers/mtd/nand/fsl_elbc_nand.c 2011-07-25 14:50:56.838326055 -0500
+++ linux-3.0/drivers/mtd/nand/fsl_elbc_nand.c 2011-07-2514:48:35.680940052 -0500
@@ -256,6 +256,25 @@ static int fsl_elbc_run_command(struct m return -EIO; } + if (chip->ecc.mode != NAND_ECC_HW) + return 0; + + if (elbc_fcm_ctrl->read_bytes == mtd->writesize + mtd->oobsize) { + uint32_t lteccr = in_be32(&lbc->lteccr); + /* + * if command was a full page read and the ELBC + * has the LTECCR register, then bits 12-15 (ppc order) of + * LTECCR indicate which 512 byte sub-pages had corrected errors. + * bits 28-31 are uncorrectable errors, marked elsewhere. + * for small page nand only 1 bit is used. + * if the ELBC doesn't have the lteccr register it reads 0 + */ + if(lteccr & 0x000F000F) + out_be32(&lbc->lteccr, 0x000F000F); /* clear lteccr */ + if(lteccr & 0x000F0000) + mtd->ecc_stats.corrected++; + } + return 0; } --