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path: root/drivers/mtd/nand/omap2.c
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Diffstat (limited to 'drivers/mtd/nand/omap2.c')
-rw-r--r--drivers/mtd/nand/omap2.c61
1 files changed, 40 insertions, 21 deletions
diff --git a/drivers/mtd/nand/omap2.c b/drivers/mtd/nand/omap2.c
index ef4190a02b7b..bf642ceef681 100644
--- a/drivers/mtd/nand/omap2.c
+++ b/drivers/mtd/nand/omap2.c
@@ -1633,6 +1633,7 @@ static int omap_nand_probe(struct platform_device *pdev)
1633 int i; 1633 int i;
1634 dma_cap_mask_t mask; 1634 dma_cap_mask_t mask;
1635 unsigned sig; 1635 unsigned sig;
1636 unsigned oob_index;
1636 struct resource *res; 1637 struct resource *res;
1637 struct mtd_part_parser_data ppdata = {}; 1638 struct mtd_part_parser_data ppdata = {};
1638 1639
@@ -1826,11 +1827,14 @@ static int omap_nand_probe(struct platform_device *pdev)
1826 (mtd->writesize / 1827 (mtd->writesize /
1827 nand_chip->ecc.size); 1828 nand_chip->ecc.size);
1828 if (nand_chip->options & NAND_BUSWIDTH_16) 1829 if (nand_chip->options & NAND_BUSWIDTH_16)
1829 ecclayout->eccpos[0] = BADBLOCK_MARKER_LENGTH; 1830 oob_index = BADBLOCK_MARKER_LENGTH;
1830 else 1831 else
1831 ecclayout->eccpos[0] = 1; 1832 oob_index = 1;
1832 ecclayout->oobfree->offset = ecclayout->eccpos[0] + 1833 for (i = 0; i < ecclayout->eccbytes; i++, oob_index++)
1833 ecclayout->eccbytes; 1834 ecclayout->eccpos[i] = oob_index;
1835 /* no reserved-marker in ecclayout for this ecc-scheme */
1836 ecclayout->oobfree->offset =
1837 ecclayout->eccpos[ecclayout->eccbytes - 1] + 1;
1834 break; 1838 break;
1835 1839
1836 case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW: 1840 case OMAP_ECC_BCH4_CODE_HW_DETECTION_SW:
@@ -1847,9 +1851,15 @@ static int omap_nand_probe(struct platform_device *pdev)
1847 ecclayout->eccbytes = nand_chip->ecc.bytes * 1851 ecclayout->eccbytes = nand_chip->ecc.bytes *
1848 (mtd->writesize / 1852 (mtd->writesize /
1849 nand_chip->ecc.size); 1853 nand_chip->ecc.size);
1850 ecclayout->eccpos[0] = BADBLOCK_MARKER_LENGTH; 1854 oob_index = BADBLOCK_MARKER_LENGTH;
1851 ecclayout->oobfree->offset = ecclayout->eccpos[0] + 1855 for (i = 0; i < ecclayout->eccbytes; i++, oob_index++) {
1852 ecclayout->eccbytes; 1856 ecclayout->eccpos[i] = oob_index;
1857 if (((i + 1) % nand_chip->ecc.bytes) == 0)
1858 oob_index++;
1859 }
1860 /* include reserved-marker in ecclayout->oobfree calculation */
1861 ecclayout->oobfree->offset = 1 +
1862 ecclayout->eccpos[ecclayout->eccbytes - 1] + 1;
1853 /* software bch library is used for locating errors */ 1863 /* software bch library is used for locating errors */
1854 nand_chip->ecc.priv = nand_bch_init(mtd, 1864 nand_chip->ecc.priv = nand_bch_init(mtd,
1855 nand_chip->ecc.size, 1865 nand_chip->ecc.size,
@@ -1883,9 +1893,12 @@ static int omap_nand_probe(struct platform_device *pdev)
1883 ecclayout->eccbytes = nand_chip->ecc.bytes * 1893 ecclayout->eccbytes = nand_chip->ecc.bytes *
1884 (mtd->writesize / 1894 (mtd->writesize /
1885 nand_chip->ecc.size); 1895 nand_chip->ecc.size);
1886 ecclayout->eccpos[0] = BADBLOCK_MARKER_LENGTH; 1896 oob_index = BADBLOCK_MARKER_LENGTH;
1887 ecclayout->oobfree->offset = ecclayout->eccpos[0] + 1897 for (i = 0; i < ecclayout->eccbytes; i++, oob_index++)
1888 ecclayout->eccbytes; 1898 ecclayout->eccpos[i] = oob_index;
1899 /* reserved marker already included in ecclayout->eccbytes */
1900 ecclayout->oobfree->offset =
1901 ecclayout->eccpos[ecclayout->eccbytes - 1] + 1;
1889 /* This ECC scheme requires ELM H/W block */ 1902 /* This ECC scheme requires ELM H/W block */
1890 if (is_elm_present(info, pdata->elm_of_node, BCH4_ECC) < 0) { 1903 if (is_elm_present(info, pdata->elm_of_node, BCH4_ECC) < 0) {
1891 pr_err("nand: error: could not initialize ELM\n"); 1904 pr_err("nand: error: could not initialize ELM\n");
@@ -1913,9 +1926,15 @@ static int omap_nand_probe(struct platform_device *pdev)
1913 ecclayout->eccbytes = nand_chip->ecc.bytes * 1926 ecclayout->eccbytes = nand_chip->ecc.bytes *
1914 (mtd->writesize / 1927 (mtd->writesize /
1915 nand_chip->ecc.size); 1928 nand_chip->ecc.size);
1916 ecclayout->eccpos[0] = BADBLOCK_MARKER_LENGTH; 1929 oob_index = BADBLOCK_MARKER_LENGTH;
1917 ecclayout->oobfree->offset = ecclayout->eccpos[0] + 1930 for (i = 0; i < ecclayout->eccbytes; i++, oob_index++) {
1918 ecclayout->eccbytes; 1931 ecclayout->eccpos[i] = oob_index;
1932 if (((i + 1) % nand_chip->ecc.bytes) == 0)
1933 oob_index++;
1934 }
1935 /* include reserved-marker in ecclayout->oobfree calculation */
1936 ecclayout->oobfree->offset = 1 +
1937 ecclayout->eccpos[ecclayout->eccbytes - 1] + 1;
1919 /* software bch library is used for locating errors */ 1938 /* software bch library is used for locating errors */
1920 nand_chip->ecc.priv = nand_bch_init(mtd, 1939 nand_chip->ecc.priv = nand_bch_init(mtd,
1921 nand_chip->ecc.size, 1940 nand_chip->ecc.size,
@@ -1956,9 +1975,12 @@ static int omap_nand_probe(struct platform_device *pdev)
1956 ecclayout->eccbytes = nand_chip->ecc.bytes * 1975 ecclayout->eccbytes = nand_chip->ecc.bytes *
1957 (mtd->writesize / 1976 (mtd->writesize /
1958 nand_chip->ecc.size); 1977 nand_chip->ecc.size);
1959 ecclayout->eccpos[0] = BADBLOCK_MARKER_LENGTH; 1978 oob_index = BADBLOCK_MARKER_LENGTH;
1960 ecclayout->oobfree->offset = ecclayout->eccpos[0] + 1979 for (i = 0; i < ecclayout->eccbytes; i++, oob_index++)
1961 ecclayout->eccbytes; 1980 ecclayout->eccpos[i] = oob_index;
1981 /* reserved marker already included in ecclayout->eccbytes */
1982 ecclayout->oobfree->offset =
1983 ecclayout->eccpos[ecclayout->eccbytes - 1] + 1;
1962 break; 1984 break;
1963#else 1985#else
1964 pr_err("nand: error: CONFIG_MTD_NAND_OMAP_BCH not enabled\n"); 1986 pr_err("nand: error: CONFIG_MTD_NAND_OMAP_BCH not enabled\n");
@@ -1972,11 +1994,8 @@ static int omap_nand_probe(struct platform_device *pdev)
1972 goto return_error; 1994 goto return_error;
1973 } 1995 }
1974 1996
1975 /* populate remaining ECC layout data */ 1997 /* all OOB bytes from oobfree->offset till end off OOB are free */
1976 ecclayout->oobfree->length = mtd->oobsize - (BADBLOCK_MARKER_LENGTH + 1998 ecclayout->oobfree->length = mtd->oobsize - ecclayout->oobfree->offset;
1977 ecclayout->eccbytes);
1978 for (i = 1; i < ecclayout->eccbytes; i++)
1979 ecclayout->eccpos[i] = ecclayout->eccpos[0] + i;
1980 /* check if NAND device's OOB is enough to store ECC signatures */ 1999 /* check if NAND device's OOB is enough to store ECC signatures */
1981 if (mtd->oobsize < (ecclayout->eccbytes + BADBLOCK_MARKER_LENGTH)) { 2000 if (mtd->oobsize < (ecclayout->eccbytes + BADBLOCK_MARKER_LENGTH)) {
1982 pr_err("not enough OOB bytes required = %d, available=%d\n", 2001 pr_err("not enough OOB bytes required = %d, available=%d\n",
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