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94 lines
3.1 KiB
Diff
94 lines
3.1 KiB
Diff
From 41825166744c6e5664281611f5e6d9a2e9333c2b Mon Sep 17 00:00:00 2001
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From: Chuanhong Guo <gch981213@gmail.com>
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Date: Sat, 2 Apr 2022 22:31:20 +0800
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Subject: [PATCH 10/15] mtd: nand: fix ecc parameters for mt7622
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According to the datasheet, mt7622 only has 5 ECC capabilities instead
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of 7, and the decoding error register is arranged as follows:
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+------+---------+---------+---------+---------+
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| Bits | 19:15 | 14:10 | 9:5 | 4:0 |
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+------+---------+---------+---------+---------+
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| Name | ERRNUM3 | ERRNUM2 | ERRNUM1 | ERRNUM0 |
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+------+---------+---------+---------+---------+
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This means err_mask should be 0x1f instead of 0x3f and the number of
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bits shifted in mtk_ecc_get_stats should be 5 instead of 8.
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This commit introduces err_shift for the difference in this register
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and fix other existing parameters.
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Public MT7622 reference manual can be found on [0] and the info this
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commit is based on is from page 656 and page 660.
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[0]: https://wiki.banana-pi.org/Banana_Pi_BPI-R64#Documents
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Fixes: 98dea8d71931 ("mtd: nand: mtk: Support MT7622 NAND flash controller.")
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Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
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(cherry picked from commit 088b769abd1bd21753002b17b696ae1778b16e8c)
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---
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drivers/mtd/nand/raw/mtk_ecc.c | 12 ++++++++----
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1 file changed, 8 insertions(+), 4 deletions(-)
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diff --git a/drivers/mtd/nand/raw/mtk_ecc.c b/drivers/mtd/nand/raw/mtk_ecc.c
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index c437d97debb8..ec9d1fb07006 100644
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--- a/drivers/mtd/nand/raw/mtk_ecc.c
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+++ b/drivers/mtd/nand/raw/mtk_ecc.c
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@@ -43,6 +43,7 @@
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struct mtk_ecc_caps {
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u32 err_mask;
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+ u32 err_shift;
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const u8 *ecc_strength;
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const u32 *ecc_regs;
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u8 num_ecc_strength;
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@@ -76,7 +77,7 @@ static const u8 ecc_strength_mt2712[] = {
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};
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static const u8 ecc_strength_mt7622[] = {
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- 4, 6, 8, 10, 12, 14, 16
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+ 4, 6, 8, 10, 12
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};
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enum mtk_ecc_regs {
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@@ -221,7 +222,7 @@ void mtk_ecc_get_stats(struct mtk_ecc *ecc, struct mtk_ecc_stats *stats,
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for (i = 0; i < sectors; i++) {
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offset = (i >> 2) << 2;
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err = readl(ecc->regs + ECC_DECENUM0 + offset);
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- err = err >> ((i % 4) * 8);
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+ err = err >> ((i % 4) * ecc->caps->err_shift);
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err &= ecc->caps->err_mask;
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if (err == ecc->caps->err_mask) {
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/* uncorrectable errors */
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@@ -449,6 +450,7 @@ EXPORT_SYMBOL(mtk_ecc_get_parity_bits);
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static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = {
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.err_mask = 0x3f,
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+ .err_shift = 8,
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.ecc_strength = ecc_strength_mt2701,
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.ecc_regs = mt2701_ecc_regs,
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.num_ecc_strength = 20,
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@@ -459,6 +461,7 @@ static const struct mtk_ecc_caps mtk_ecc_caps_mt2701 = {
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static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = {
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.err_mask = 0x7f,
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+ .err_shift = 8,
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.ecc_strength = ecc_strength_mt2712,
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.ecc_regs = mt2712_ecc_regs,
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.num_ecc_strength = 23,
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@@ -468,10 +471,11 @@ static const struct mtk_ecc_caps mtk_ecc_caps_mt2712 = {
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};
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static const struct mtk_ecc_caps mtk_ecc_caps_mt7622 = {
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- .err_mask = 0x3f,
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+ .err_mask = 0x1f,
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+ .err_shift = 5,
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.ecc_strength = ecc_strength_mt7622,
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.ecc_regs = mt7622_ecc_regs,
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- .num_ecc_strength = 7,
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+ .num_ecc_strength = 5,
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.ecc_mode_shift = 4,
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.parity_bits = 13,
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.pg_irq_sel = 0,
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--
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2.35.1
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