diff options
author | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-03-18 16:54:27 (GMT) |
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committer | Boris Brezillon <boris.brezillon@free-electrons.com> | 2016-05-05 21:51:49 (GMT) |
commit | 421e81c4c6c03a5f6cbc40ea208fb07ad5797e09 (patch) | |
tree | e8d6ac97d1adf2080936fd920feea934e083d590 /drivers/mtd/nand | |
parent | 3cf32d180227c1a1f5e017c997085d52a10a106f (diff) | |
download | linux-421e81c4c6c03a5f6cbc40ea208fb07ad5797e09.tar.xz |
mtd: nand: qcom: switch to mtd_ooblayout_ops
Implementing the mtd_ooblayout_ops interface is the new way of exposing
ECC/OOB layout to MTD users.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Tested-by: Archit Taneja <architt@codeaurora.org>
Diffstat (limited to 'drivers/mtd/nand')
-rw-r--r-- | drivers/mtd/nand/qcom_nandc.c | 79 |
1 files changed, 34 insertions, 45 deletions
diff --git a/drivers/mtd/nand/qcom_nandc.c b/drivers/mtd/nand/qcom_nandc.c index 4ea2cb7..de7d28e 100644 --- a/drivers/mtd/nand/qcom_nandc.c +++ b/drivers/mtd/nand/qcom_nandc.c @@ -1707,61 +1707,52 @@ static void qcom_nandc_select_chip(struct mtd_info *mtd, int chipnr) * This layout is read as is when ECC is disabled. When ECC is enabled, the * inaccessible Bad Block byte(s) are ignored when we write to a page/oob, * and assumed as 0xffs when we read a page/oob. The ECC, unused and - * dummy/real bad block bytes are grouped as ecc bytes in nand_ecclayout (i.e, - * ecc->bytes is the sum of the three). + * dummy/real bad block bytes are grouped as ecc bytes (i.e, ecc->bytes is + * the sum of the three). */ - -static struct nand_ecclayout * -qcom_nand_create_layout(struct qcom_nand_host *host) +static int qcom_nand_ooblayout_ecc(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) { - struct nand_chip *chip = &host->chip; - struct mtd_info *mtd = nand_to_mtd(chip); - struct qcom_nand_controller *nandc = get_qcom_nand_controller(chip); + struct nand_chip *chip = mtd_to_nand(mtd); + struct qcom_nand_host *host = to_qcom_nand_host(chip); struct nand_ecc_ctrl *ecc = &chip->ecc; - struct nand_ecclayout *layout; - int i, j, steps, pos = 0, shift = 0; - layout = devm_kzalloc(nandc->dev, sizeof(*layout), GFP_KERNEL); - if (!layout) - return NULL; + if (section > 1) + return -ERANGE; - steps = mtd->writesize / ecc->size; - layout->eccbytes = steps * ecc->bytes; - - layout->oobfree[0].offset = (steps - 1) * ecc->bytes + host->bbm_size; - layout->oobfree[0].length = steps << 2; - - /* - * the oob bytes in the first n - 1 codewords are all grouped together - * in the format: - * DUMMY_BBM + UNUSED + ECC - */ - for (i = 0; i < steps - 1; i++) { - for (j = 0; j < ecc->bytes; j++) - layout->eccpos[pos++] = i * ecc->bytes + j; + if (!section) { + oobregion->length = (ecc->bytes * (ecc->steps - 1)) + + host->bbm_size; + oobregion->offset = 0; + } else { + oobregion->length = host->ecc_bytes_hw + host->spare_bytes; + oobregion->offset = mtd->oobsize - oobregion->length; } - /* - * the oob bytes in the last codeword are grouped in the format: - * BBM + FREE OOB + UNUSED + ECC - */ + return 0; +} - /* fill up the bbm positions */ - for (j = 0; j < host->bbm_size; j++) - layout->eccpos[pos++] = i * ecc->bytes + j; +static int qcom_nand_ooblayout_free(struct mtd_info *mtd, int section, + struct mtd_oob_region *oobregion) +{ + struct nand_chip *chip = mtd_to_nand(mtd); + struct qcom_nand_host *host = to_qcom_nand_host(chip); + struct nand_ecc_ctrl *ecc = &chip->ecc; - /* - * fill up the ecc and reserved positions, their indices are offseted - * by the free oob region - */ - shift = layout->oobfree[0].length + host->bbm_size; + if (section) + return -ERANGE; - for (j = 0; j < (host->ecc_bytes_hw + host->spare_bytes); j++) - layout->eccpos[pos++] = i * ecc->bytes + shift + j; + oobregion->length = ecc->steps * 4; + oobregion->offset = ((ecc->steps - 1) * ecc->bytes) + host->bbm_size; - return layout; + return 0; } +static const struct mtd_ooblayout_ops qcom_nand_ooblayout_ops = { + .ecc = qcom_nand_ooblayout_ecc, + .free = qcom_nand_ooblayout_free, +}; + static int qcom_nand_host_setup(struct qcom_nand_host *host) { struct nand_chip *chip = &host->chip; @@ -1848,9 +1839,7 @@ static int qcom_nand_host_setup(struct qcom_nand_host *host) ecc->mode = NAND_ECC_HW; - ecc->layout = qcom_nand_create_layout(host); - if (!ecc->layout) - return -ENOMEM; + mtd_set_ooblayout(mtd, &qcom_nand_ooblayout_ops); cwperpage = mtd->writesize / ecc->size; |