Merge branch '2022-03-28-critical-fixes'

- A zstd, two Apple M1 and an MXS NAND critical bugfix
- Clean up another file that wasn't being removed and update some
  external documentation links.

3 files changed, 63 insertions, 12 deletions

diff --git a/drivers/misc/mxc_ocotp.c b/drivers/misc/mxc_ocotp.c
index b1893a5c7eb..8ee18f29d9b 100644
--- a/drivers/misc/mxc_ocotp.c
+++ b/drivers/misc/mxc_ocotp.c
@@ -6,7 +6,7 @@
  * Based on Dirk Behme's
  * https://github.com/dirkbehme/u-boot-imx6/blob/28b17e9/drivers/misc/imx_otp.c,
  * which is based on Freescale's
- * http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/tree/drivers/misc/imx_otp.c?h=imx_v2009.08_1.1.0&id=9aa74e6,
+ * https://source.codeaurora.org/external/imx/uboot-imx/tree/drivers/misc/imx_otp.c?id=9aa74e6,
  * which is:
  * Copyright (C) 2011 Freescale Semiconductor, Inc.
  */
diff --git a/drivers/mtd/nand/raw/mxs_nand.c b/drivers/mtd/nand/raw/mxs_nand.c
index 748056a43e6..ee5d7fde9ce 100644
--- a/drivers/mtd/nand/raw/mxs_nand.c
+++ b/drivers/mtd/nand/raw/mxs_nand.c
@@ -195,6 +195,7 @@ static inline int mxs_nand_legacy_calc_ecc_layout(struct bch_geometry *geo,
 	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct mxs_nand_info *nand_info = nand_get_controller_data(chip);
 	unsigned int block_mark_bit_offset;
+	int corr, ds_corr;
 
 	/* The default for the length of Galois Field. */
 	geo->gf_len = 13;
@@ -225,6 +226,17 @@ static inline int mxs_nand_legacy_calc_ecc_layout(struct bch_geometry *geo,
 	geo->ecc_strength = min(round_down(geo->ecc_strength, 2),
 				nand_info->max_ecc_strength_supported);
 
+	/* check ecc strength, same as nand_ecc_is_strong_enough() did*/
+	if (chip->ecc_step_ds) {
+		corr = mtd->writesize * geo->ecc_strength /
+		       geo->ecc_chunkn_size;
+		ds_corr = mtd->writesize * chip->ecc_strength_ds /
+		       chip->ecc_step_ds;
+		if (corr < ds_corr ||
+		    geo->ecc_strength < chip->ecc_strength_ds)
+			return -EINVAL;
+	}
+
 	block_mark_bit_offset = mtd->writesize * 8 -
 		(geo->ecc_strength * geo->gf_len * (geo->ecc_chunk_count - 1)
 				+ MXS_NAND_METADATA_SIZE * 8);
@@ -1111,6 +1123,7 @@ static int mxs_nand_set_geometry(struct mtd_info *mtd, struct bch_geometry *geo)
 	struct nand_chip *chip = mtd_to_nand(mtd);
 	struct nand_chip *nand = mtd_to_nand(mtd);
 	struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
+	int err;
 
 	if (chip->ecc_strength_ds > nand_info->max_ecc_strength_supported) {
 		printf("unsupported NAND chip, minimum ecc required %d\n"
@@ -1118,19 +1131,57 @@ static int mxs_nand_set_geometry(struct mtd_info *mtd, struct bch_geometry *geo)
 		return -EINVAL;
 	}
 
-	if ((!(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0) &&
-	     mtd->oobsize < 1024) || nand_info->legacy_bch_geometry) {
-		dev_warn(mtd->dev, "use legacy bch geometry\n");
-		return mxs_nand_legacy_calc_ecc_layout(geo, mtd);
+	/* use the legacy bch setting by default */
+	if ((!nand_info->use_minimum_ecc && mtd->oobsize < 1024) ||
+	    !(chip->ecc_strength_ds > 0 && chip->ecc_step_ds > 0)) {
+		dev_dbg(mtd->dev, "use legacy bch geometry\n");
+		err = mxs_nand_legacy_calc_ecc_layout(geo, mtd);
+		if (!err)
+			return 0;
 	}
 
-	if (mtd->oobsize > 1024 || chip->ecc_step_ds < mtd->oobsize)
-		return mxs_nand_calc_ecc_for_large_oob(geo, mtd);
+	/* for large oob nand */
+	if (mtd->oobsize > 1024) {
+		dev_dbg(mtd->dev, "use large oob bch geometry\n");
+		err = mxs_nand_calc_ecc_for_large_oob(geo, mtd);
+		if (!err)
+			return 0;
+	}
 
-	return mxs_nand_calc_ecc_layout_by_info(geo, mtd,
-				chip->ecc_strength_ds, chip->ecc_step_ds);
+	/* otherwise use the minimum ecc nand chips required */
+	dev_dbg(mtd->dev, "use minimum ecc bch geometry\n");
+	err = mxs_nand_calc_ecc_layout_by_info(geo, mtd, chip->ecc_strength_ds,
+					       chip->ecc_step_ds);
 
-	return 0;
+	if (err)
+		dev_err(mtd->dev, "none of the bch geometry setting works\n");
+
+	return err;
+}
+
+void mxs_nand_dump_geo(struct mtd_info *mtd)
+{
+	struct nand_chip *nand = mtd_to_nand(mtd);
+	struct mxs_nand_info *nand_info = nand_get_controller_data(nand);
+	struct bch_geometry *geo = &nand_info->bch_geometry;
+
+	dev_dbg(mtd->dev, "BCH Geometry :\n"
+		"GF Length\t\t: %u\n"
+		"ECC Strength\t\t: %u\n"
+		"ECC for Meta\t\t: %u\n"
+		"ECC Chunk0 Size\t\t: %u\n"
+		"ECC Chunkn Size\t\t: %u\n"
+		"ECC Chunk Count\t\t: %u\n"
+		"Block Mark Byte Offset\t: %u\n"
+		"Block Mark Bit Offset\t: %u\n",
+		geo->gf_len,
+		geo->ecc_strength,
+		geo->ecc_for_meta,
+		geo->ecc_chunk0_size,
+		geo->ecc_chunkn_size,
+		geo->ecc_chunk_count,
+		geo->block_mark_byte_offset,
+		geo->block_mark_bit_offset);
 }
 
 /*
@@ -1159,6 +1210,8 @@ int mxs_nand_setup_ecc(struct mtd_info *mtd)
 	if (ret)
 		return ret;
 
+	mxs_nand_dump_geo(mtd);
+
 	/* Configure BCH and set NFC geometry */
 	mxs_reset_block(&bch_regs->hw_bch_ctrl_reg);
 
diff --git a/drivers/mtd/nand/raw/mxs_nand_dt.c b/drivers/mtd/nand/raw/mxs_nand_dt.c
index 878796d5552..b9833a646f0 100644
--- a/drivers/mtd/nand/raw/mxs_nand_dt.c
+++ b/drivers/mtd/nand/raw/mxs_nand_dt.c
@@ -92,8 +92,6 @@ static int mxs_nand_dt_probe(struct udevice *dev)
 
 	info->use_minimum_ecc = dev_read_bool(dev, "fsl,use-minimum-ecc");
 
-	info->legacy_bch_geometry = dev_read_bool(dev, "fsl,legacy-bch-geometry");
-
 	if (IS_ENABLED(CONFIG_CLK) && IS_ENABLED(CONFIG_IMX8)) {
 		/* Assigned clock already set clock */
 		struct clk gpmi_clk;