Merge branch 'master' of git://git.denx.de/u-boot-nand-flash

* 'master' of git://git.denx.de/u-boot-nand-flash:
  cmd_nand.c: Fix 'nand dump' after latest MTD resync
  mtd/nand:Fix wrong usage of is_blank() in fsl_ifc_run_command
  mtd/nand: Fix IFC driver to support 2K NAND page
  nand: reinstate lazy bad block scanning
  Revert "nand: make 1-bit software ECC configurable"

3 files changed, 49 insertions, 46 deletions

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 998fc73..1d1b628 100644
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -39,7 +39,7 @@ COBJS-y += nand_bbt.o
 COBJS-y += nand_ids.o
 COBJS-y += nand_util.o
 endif
-COBJS-$(CONFIG_MTD_ECC_SOFT) += nand_ecc.o
+COBJS-y += nand_ecc.o
 COBJS-y += nand_base.o
 COBJS-$(CONFIG_NAND_ECC_BCH) += nand_bch.o
 
diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index b3f3c3c..5cac78b 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -1,6 +1,6 @@
 /* Integrated Flash Controller NAND Machine Driver
  *
- * Copyright (c) 2011 Freescale Semiconductor, Inc
+ * Copyright (c) 2012 Freescale Semiconductor, Inc
  *
  * Authors: Dipen Dudhat <Dipen.Dudhat@freescale.com>
  *
@@ -221,24 +221,11 @@ static int check_read_ecc(struct mtd_info *mtd, struct fsl_ifc_ctrl *ctrl,
 			  u32 *eccstat, unsigned int bufnum)
 {
 	u32 reg = eccstat[bufnum / 4];
-	int errors = (reg >> ((3 - bufnum % 4) * 8)) & 15;
-
-	if (errors == 15) { /* uncorrectable */
-		/* Blank pages fail hw ECC checks */
-		if (is_blank(mtd, ctrl, bufnum))
-			return 1;
-
-		/*
-		 * We disable ECCER reporting in hardware due to
-		 * erratum IFC-A002770 -- so report it now if we
-		 * see an uncorrectable error in ECCSTAT.
-		 */
-		ctrl->status |= IFC_NAND_EVTER_STAT_ECCER;
-	} else if (errors > 0) {
-		mtd->ecc_stats.corrected += errors;
-	}
+	int errors;
 
-	return 0;
+	errors = (reg >> ((3 - bufnum % 4) * 8)) & 15;
+
+	return errors;
 }
 
 /*
@@ -279,16 +266,33 @@ static int fsl_ifc_run_command(struct mtd_info *mtd)
 		printf("%s: Write Protect Error\n", __func__);
 
 	if (ctrl->eccread) {
-		int bufperpage = mtd->writesize / 512;
-		int bufnum = (ctrl->page & priv->bufnum_mask) * bufperpage;
-		int bufnum_end = bufnum + bufperpage - 1;
+		int errors;
+		int bufnum = ctrl->page & priv->bufnum_mask;
+		int sector = bufnum * chip->ecc.steps;
+		int sector_end = sector + chip->ecc.steps - 1;
 
-		for (i = bufnum / 4; i <= bufnum_end / 4; i++)
+		for (i = sector / 4; i <= sector_end / 4; i++)
 			eccstat[i] = in_be32(&ifc->ifc_nand.nand_eccstat[i]);
 
-		for (i = bufnum; i <= bufnum_end; i++) {
-			if (check_read_ecc(mtd, ctrl, eccstat, i))
+		for (i = sector; i <= sector_end; i++) {
+			errors = check_read_ecc(mtd, ctrl, eccstat, i);
+
+			if (errors == 15) {
+				/*
+				 * Uncorrectable error.
+				 * OK only if the whole page is blank.
+				 *
+				 * We disable ECCER reporting due to erratum
+				 * IFC-A002770 -- so report it now if we
+				 * see an uncorrectable error in ECCSTAT.
+				 */
+				if (!is_blank(mtd, ctrl, bufnum))
+					ctrl->status |=
+						IFC_NAND_EVTER_STAT_ECCER;
 				break;
+			}
+
+			mtd->ecc_stats.corrected += errors;
 		}
 
 		ctrl->eccread = 0;
@@ -448,21 +452,19 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 			out_be32(&ifc->ifc_nand.nand_fir1,
 				 (IFC_FIR_OP_CW1 << IFC_NAND_FIR1_OP5_SHIFT));
 
-			if (column >= mtd->writesize) {
-				/* OOB area --> READOOB */
-				column -= mtd->writesize;
-				nand_fcr0 |= NAND_CMD_READOOB <<
-						IFC_NAND_FCR0_CMD0_SHIFT;
-				ctrl->oob = 1;
-			} else if (column < 256) {
-				/* First 256 bytes --> READ0 */
-				nand_fcr0 |= NAND_CMD_READ0 << FCR_CMD0_SHIFT;
-			} else {
-				/* Second 256 bytes --> READ1 */
-				nand_fcr0 |= NAND_CMD_READ1 << FCR_CMD0_SHIFT;
-			}
+			if (column >= mtd->writesize)
+				nand_fcr0 |=
+				NAND_CMD_READOOB << IFC_NAND_FCR0_CMD0_SHIFT;
+			else
+				nand_fcr0 |=
+				NAND_CMD_READ0 << IFC_NAND_FCR0_CMD0_SHIFT;
 		}
 
+		if (column >= mtd->writesize) {
+			/* OOB area --> READOOB */
+			column -= mtd->writesize;
+			ctrl->oob = 1;
+		}
 		out_be32(&ifc->ifc_nand.nand_fcr0, nand_fcr0);
 		set_addr(mtd, column, page_addr, ctrl->oob);
 		return;
@@ -471,7 +473,8 @@ static void fsl_ifc_cmdfunc(struct mtd_info *mtd, unsigned int command,
 	/* PAGEPROG reuses all of the setup from SEQIN and adds the length */
 	case NAND_CMD_PAGEPROG:
 		if (ctrl->oob)
-			out_be32(&ifc->ifc_nand.nand_fbcr, ctrl->index);
+			out_be32(&ifc->ifc_nand.nand_fbcr,
+					ctrl->index - ctrl->column);
 		else
 			out_be32(&ifc->ifc_nand.nand_fbcr, 0);
 
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index 12b960f..44f7b91 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -479,6 +479,11 @@ static int nand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip,
 {
 	struct nand_chip *chip = mtd->priv;
 
+	if (!(chip->options & NAND_BBT_SCANNED)) {
+		chip->options |= NAND_BBT_SCANNED;
+		chip->scan_bbt(mtd);
+	}
+
 	if (!chip->bbt)
 		return chip->block_bad(mtd, ofs, getchip);
 
@@ -3028,10 +3033,6 @@ int nand_scan_tail(struct mtd_info *mtd)
 		chip->ecc.mode = NAND_ECC_SOFT;
 
 	case NAND_ECC_SOFT:
-		if (!mtd_nand_has_ecc_soft()) {
-			printk(KERN_WARNING "CONFIG_MTD_ECC_SOFT not enabled\n");
-			return -EINVAL;
-		}
 		chip->ecc.calculate = nand_calculate_ecc;
 		chip->ecc.correct = nand_correct_data;
 		chip->ecc.read_page = nand_read_page_swecc;
@@ -3170,10 +3171,9 @@ int nand_scan_tail(struct mtd_info *mtd)
 
 	/* Check, if we should skip the bad block table scan */
 	if (chip->options & NAND_SKIP_BBTSCAN)
-		return 0;
+		chip->options |= NAND_BBT_SCANNED;
 
-	/* Build bad block table */
-	return chip->scan_bbt(mtd);
+	return 0;
 }
 
 /**