diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch b/target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch new file mode 100644 index 0000000..f1af823 --- /dev/null +++ b/target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch @@ -0,0 +1,135 @@ +From 3282055a7d0a304d541dbdbe2e32167e1a2f117c Mon Sep 17 00:00:00 2001 +From: Boris BREZILLON <boris.brezillon@free-electrons.com> +Date: Mon, 28 Jul 2014 14:20:54 +0200 +Subject: [PATCH] mtd: nand: Take nand_ecc_ctrl initialization out of + nand_scan_tail + +Take ECC initialization code portion out of nand_scan_tail so that we can +re-use this implementation. + +This commit only moves some code around and makes no functional changes. + +Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +--- + drivers/mtd/nand/nand_base.c | 91 +++++++++++++++++++++++++++----------------- + 1 file changed, 56 insertions(+), 35 deletions(-) + +--- a/drivers/mtd/nand/nand_base.c ++++ b/drivers/mtd/nand/nand_base.c +@@ -3892,42 +3892,15 @@ static bool nand_ecc_strength_good(struc + return corr >= ds_corr && ecc->strength >= chip->ecc_strength_ds; + } + +-/** +- * nand_scan_tail - [NAND Interface] Scan for the NAND device +- * @mtd: MTD device structure +- * +- * This is the second phase of the normal nand_scan() function. It fills out +- * all the uninitialized function pointers with the defaults and scans for a +- * bad block table if appropriate. ++/* ++ * Initialize ECC struct: ++ * - fill ECC struct with default function/values when these ones are undefined ++ * - fill ECC infos based on MTD device + */ +-int nand_scan_tail(struct mtd_info *mtd) ++static int nand_ecc_ctrl_init(struct mtd_info *mtd, struct nand_ecc_ctrl *ecc) + { + int i; +- struct nand_chip *chip = mtd->priv; +- struct nand_ecc_ctrl *ecc = &chip->ecc; +- struct nand_buffers *nbuf; + +- /* New bad blocks should be marked in OOB, flash-based BBT, or both */ +- BUG_ON((chip->bbt_options & NAND_BBT_NO_OOB_BBM) && +- !(chip->bbt_options & NAND_BBT_USE_FLASH)); +- +- if (!(chip->options & NAND_OWN_BUFFERS)) { +- nbuf = kzalloc(sizeof(*nbuf) + mtd->writesize +- + mtd->oobsize * 3, GFP_KERNEL); +- if (!nbuf) +- return -ENOMEM; +- nbuf->ecccalc = (uint8_t *)(nbuf + 1); +- nbuf->ecccode = nbuf->ecccalc + mtd->oobsize; +- nbuf->databuf = nbuf->ecccode + mtd->oobsize; +- +- chip->buffers = nbuf; +- } else { +- if (!chip->buffers) +- return -ENOMEM; +- } +- +- /* Set the internal oob buffer location, just after the page data */ +- chip->oob_poi = chip->buffers->databuf + mtd->writesize; + + /* + * If no default placement scheme is given, select an appropriate one. +@@ -3953,9 +3926,6 @@ int nand_scan_tail(struct mtd_info *mtd) + } + } + +- if (!chip->write_page) +- chip->write_page = nand_write_page; +- + /* + * Check ECC mode, default to software if 3byte/512byte hardware ECC is + * selected and we have 256 byte pagesize fallback to software ECC +@@ -4125,6 +4095,57 @@ int nand_scan_tail(struct mtd_info *mtd) + } + ecc->total = ecc->steps * ecc->bytes; + ++ return 0; ++} ++ ++/** ++ * nand_scan_tail - [NAND Interface] Scan for the NAND device ++ * @mtd: MTD device structure ++ * ++ * This is the second phase of the normal nand_scan() function. It fills out ++ * all the uninitialized function pointers with the defaults and scans for a ++ * bad block table if appropriate. ++ */ ++int nand_scan_tail(struct mtd_info *mtd) ++{ ++ int ret; ++ struct nand_chip *chip = mtd->priv; ++ struct nand_ecc_ctrl *ecc = &chip->ecc; ++ struct nand_buffers *nbuf; ++ ++ /* New bad blocks should be marked in OOB, flash-based BBT, or both */ ++ BUG_ON((chip->bbt_options & NAND_BBT_NO_OOB_BBM) && ++ !(chip->bbt_options & NAND_BBT_USE_FLASH)); ++ ++ if (!(chip->options & NAND_OWN_BUFFERS)) { ++ nbuf = kzalloc(sizeof(*nbuf) + mtd->writesize ++ + mtd->oobsize * 3, GFP_KERNEL); ++ if (!nbuf) ++ return -ENOMEM; ++ nbuf->ecccalc = (uint8_t *)(nbuf + 1); ++ nbuf->ecccode = nbuf->ecccalc + mtd->oobsize; ++ nbuf->databuf = nbuf->ecccode + mtd->oobsize; ++ chip->buffers = nbuf; ++ } else { ++ if (!chip->buffers) ++ return -ENOMEM; ++ } ++ ++ /* Set the internal oob buffer location, just after the page data */ ++ chip->oob_poi = chip->buffers->databuf + mtd->writesize; ++ ++ if (!chip->write_page) ++ chip->write_page = nand_write_page; ++ ++ /* Initialize ECC struct */ ++ ret = nand_ecc_ctrl_init(mtd, ecc); ++ if (ret) { ++ if (!(chip->options & NAND_OWN_BUFFERS)) ++ kfree(chip->buffers); ++ ++ return ret; ++ } ++ + /* Allow subpage writes up to ecc.steps. Not possible for MLC flash */ + if (!(chip->options & NAND_NO_SUBPAGE_WRITE) && nand_is_slc(chip)) { + switch (ecc->steps) { |