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authorJames <>2015-11-04 11:49:21 +0000
committerJames <>2015-11-04 11:49:21 +0000
commit716ca530e1c4515d8683c9d5be3d56b301758b66 (patch)
tree700eb5bcc1a462a5f21dcec15ce7c97ecfefa772 /target/linux/sunxi/patches-4.1/110-mtd-move-nand_ecc_ctrl-init.patch
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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.patch135
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) {