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From:   Schrempf Frieder <frieder.schrempf@kontron.de>
To:     "bbrezillon@kernel.org" <bbrezillon@kernel.org>,
        "miquel.raynal@bootlin.com" <miquel.raynal@bootlin.com>,
        "richard@nod.at" <richard@nod.at>,
        David Woodhouse <dwmw2@infradead.org>,
        Brian Norris <computersforpeace@gmail.com>,
        Marek Vasut <marek.vasut@gmail.com>
CC:     "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
        "Schrempf Frieder" <frieder.schrempf@kontron.de>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: [PATCH v6 1/7] mtd: rawnand: Always store info about bad block
 markers in chip struct
Thread-Topic: [PATCH v6 1/7] mtd: rawnand: Always store info about bad block
 markers in chip struct
Thread-Index: AQHU9Roxj6tZ0kJRpEqFYDkgYmt4cg==
Date:   Wed, 17 Apr 2019 12:36:34 +0000
Message-ID: <20190417123631.22545-2-frieder.schrempf@kontron.de>
References: <20190417123631.22545-1-frieder.schrempf@kontron.de>
In-Reply-To: <20190417123631.22545-1-frieder.schrempf@kontron.de>
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From: Frieder Schrempf <frieder.schrempf@kontron.de>

The information about where the manufacturer puts the bad block
markers inside the bad block and in the OOB data is stored in
different places. Let's move this information to nand_chip.options
and nand_chip.badblockpos.

As this chip-specific information is not directly related to the
bad block table (BBT), we also rename the flags to NAND_BBM_*.

Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/mtd/nand/raw/nand_amd.c      |  2 +-
 drivers/mtd/nand/raw/nand_base.c     | 12 ++++++------
 drivers/mtd/nand/raw/nand_bbt.c      |  4 ++--
 drivers/mtd/nand/raw/nand_esmt.c     |  2 +-
 drivers/mtd/nand/raw/nand_hynix.c    |  4 ++--
 drivers/mtd/nand/raw/nand_macronix.c |  2 +-
 drivers/mtd/nand/raw/nand_micron.c   |  2 +-
 drivers/mtd/nand/raw/nand_samsung.c  |  4 ++--
 drivers/mtd/nand/raw/nand_toshiba.c  |  2 +-
 drivers/mtd/nand/raw/sh_flctl.c      |  4 ++--
 include/linux/mtd/rawnand.h          | 16 +++++++++++++++-
 11 files changed, 34 insertions(+), 20 deletions(-)

diff --git a/drivers/mtd/nand/raw/nand_amd.c b/drivers/mtd/nand/raw/nand_amd.c
index e008fd662ee6..9051e4e41eee 100644
--- a/drivers/mtd/nand/raw/nand_amd.c
+++ b/drivers/mtd/nand/raw/nand_amd.c
@@ -45,7 +45,7 @@ static void amd_nand_decode_id(struct nand_chip *chip)
 static int amd_nand_init(struct nand_chip *chip)
 {
 	if (nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	return 0;
 }
diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index fd7ce5b929c0..e1111291389a 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -295,11 +295,11 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
 	int page, page_end, res;
 	u8 bad;
 
-	if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+	if (chip->options & NAND_BBM_LASTPAGE)
 		ofs += mtd->erasesize - mtd->writesize;
 
 	page = (int)(ofs >> chip->page_shift) & chip->pagemask;
-	page_end = page + (chip->bbt_options & NAND_BBT_SCAN2NDPAGE ? 2 : 1);
+	page_end = page + ((chip->options & NAND_BBM_SECONDPAGE) ? 2 : 1);
 
 	for (; page < page_end; page++) {
 		res = chip->ecc.read_oob(chip, page);
@@ -507,7 +507,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
 	ops.mode = MTD_OPS_PLACE_OOB;
 
 	/* Write to first/last page(s) if necessary */
-	if (chip->bbt_options & NAND_BBT_SCANLASTPAGE)
+	if (chip->options & NAND_BBM_LASTPAGE)
 		ofs += mtd->erasesize - mtd->writesize;
 	do {
 		res = nand_do_write_oob(chip, ofs, &ops);
@@ -516,7 +516,7 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
 
 		i++;
 		ofs += mtd->writesize;
-	} while ((chip->bbt_options & NAND_BBT_SCAN2NDPAGE) && i < 2);
+	} while ((chip->options & NAND_BBM_SECONDPAGE) && i < 2);
 
 	return ret;
 }
@@ -4513,9 +4513,9 @@ static void nand_decode_bbm_options(struct nand_chip *chip)
 
 	/* Set the bad block position */
 	if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
-		chip->badblockpos = NAND_LARGE_BADBLOCK_POS;
+		chip->badblockpos = NAND_BBM_POS_LARGE;
 	else
-		chip->badblockpos = NAND_SMALL_BADBLOCK_POS;
+		chip->badblockpos = NAND_BBM_POS_SMALL;
 }
 
 static inline bool is_full_id_nand(struct nand_flash_dev *type)
diff --git a/drivers/mtd/nand/raw/nand_bbt.c b/drivers/mtd/nand/raw/nand_bbt.c
index 9a7855839f81..4915dd7283bb 100644
--- a/drivers/mtd/nand/raw/nand_bbt.c
+++ b/drivers/mtd/nand/raw/nand_bbt.c
@@ -468,7 +468,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
 
 	pr_info("Scanning device for bad blocks\n");
 
-	if (bd->options & NAND_BBT_SCAN2NDPAGE)
+	if (this->options & NAND_BBM_SECONDPAGE)
 		numpages = 2;
 	else
 		numpages = 1;
@@ -489,7 +489,7 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
 		from = (loff_t)startblock << this->bbt_erase_shift;
 	}
 
-	if (this->bbt_options & NAND_BBT_SCANLASTPAGE)
+	if (this->options & NAND_BBM_LASTPAGE)
 		from += mtd->erasesize - (mtd->writesize * numpages);
 
 	for (i = startblock; i < numblocks; i++) {
diff --git a/drivers/mtd/nand/raw/nand_esmt.c b/drivers/mtd/nand/raw/nand_esmt.c
index 3de5e89482f5..4320d4c6a7cd 100644
--- a/drivers/mtd/nand/raw/nand_esmt.c
+++ b/drivers/mtd/nand/raw/nand_esmt.c
@@ -36,7 +36,7 @@ static void esmt_nand_decode_id(struct nand_chip *chip)
 static int esmt_nand_init(struct nand_chip *chip)
 {
 	if (nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	return 0;
 }
diff --git a/drivers/mtd/nand/raw/nand_hynix.c b/drivers/mtd/nand/raw/nand_hynix.c
index 821d221b83eb..33cb10df65b8 100644
--- a/drivers/mtd/nand/raw/nand_hynix.c
+++ b/drivers/mtd/nand/raw/nand_hynix.c
@@ -688,9 +688,9 @@ static int hynix_nand_init(struct nand_chip *chip)
 	int ret;
 
 	if (!nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
+		chip->options |= NAND_BBM_LASTPAGE;
 	else
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
 	if (!hynix)
diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index 47d8cda547cf..6db7ced4b96b 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -62,7 +62,7 @@ static void macronix_nand_fix_broken_get_timings(struct nand_chip *chip)
 static int macronix_nand_init(struct nand_chip *chip)
 {
 	if (nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	macronix_nand_fix_broken_get_timings(chip);
 
diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
index 7a2cef02eacd..d43e15772f73 100644
--- a/drivers/mtd/nand/raw/nand_micron.c
+++ b/drivers/mtd/nand/raw/nand_micron.c
@@ -448,7 +448,7 @@ static int micron_nand_init(struct nand_chip *chip)
 		goto err_free_manuf_data;
 
 	if (mtd->writesize == 2048)
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	ondie = micron_supports_on_die_ecc(chip);
 
diff --git a/drivers/mtd/nand/raw/nand_samsung.c b/drivers/mtd/nand/raw/nand_samsung.c
index f7d7041b6213..f4db72329b7b 100644
--- a/drivers/mtd/nand/raw/nand_samsung.c
+++ b/drivers/mtd/nand/raw/nand_samsung.c
@@ -131,9 +131,9 @@ static int samsung_nand_init(struct nand_chip *chip)
 		chip->options |= NAND_SAMSUNG_LP_OPTIONS;
 
 	if (!nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCANLASTPAGE;
+		chip->options |= NAND_BBM_LASTPAGE;
 	else
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |= NAND_BBM_SECONDPAGE;
 
 	return 0;
 }
diff --git a/drivers/mtd/nand/raw/nand_toshiba.c b/drivers/mtd/nand/raw/nand_toshiba.c
index 13f9632f1cb4..67f01cef5651 100644
--- a/drivers/mtd/nand/raw/nand_toshiba.c
+++ b/drivers/mtd/nand/raw/nand_toshiba.c
@@ -152,7 +152,7 @@ static void toshiba_nand_decode_id(struct nand_chip *chip)
 static int toshiba_nand_init(struct nand_chip *chip)
 {
 	if (nand_is_slc(chip))
-		chip->bbt_options |= NAND_BBT_SCAN2NDPAGE;
+		chip->options |=  NAND_BBM_SECONDPAGE;
 
 	/* Check that chip is BENAND and ECC mode is on-die */
 	if (nand_is_slc(chip) && chip->ecc.mode == NAND_ECC_ON_DIE &&
diff --git a/drivers/mtd/nand/raw/sh_flctl.c b/drivers/mtd/nand/raw/sh_flctl.c
index 3f610040f0c3..02a6768ab13f 100644
--- a/drivers/mtd/nand/raw/sh_flctl.c
+++ b/drivers/mtd/nand/raw/sh_flctl.c
@@ -101,14 +101,12 @@ static const struct mtd_ooblayout_ops flctl_4secc_oob_largepage_ops = {
 static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
 
 static struct nand_bbt_descr flctl_4secc_smallpage = {
-	.options = NAND_BBT_SCAN2NDPAGE,
 	.offs = 11,
 	.len = 1,
 	.pattern = scan_ff_pattern,
 };
 
 static struct nand_bbt_descr flctl_4secc_largepage = {
-	.options = NAND_BBT_SCAN2NDPAGE,
 	.offs = 0,
 	.len = 2,
 	.pattern = scan_ff_pattern,
@@ -1179,6 +1177,8 @@ static int flctl_probe(struct platform_device *pdev)
 	if (pdata->flcmncr_val & SEL_16BIT)
 		nand->options |= NAND_BUSWIDTH_16;
 
+	nand->options |= NAND_BBM_SECONDPAGE;
+
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_resume(&pdev->dev);
 
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index c0589f82c1f8..ef9e54a7ddeb 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -169,6 +169,20 @@ enum nand_ecc_algo {
 /* Macros to identify the above */
 #define NAND_HAS_SUBPAGE_READ(chip) ((chip->options & NAND_SUBPAGE_READ))
 
+/*
+ * There are different places where the manufacturer stores the factory bad
+ * block markers.
+ *
+ * Position within the block: Each of these pages needs to be checked for a
+ * bad block marking pattern.
+ */
+#define NAND_BBM_SECONDPAGE		0x02000000
+#define NAND_BBM_LASTPAGE		0x04000000
+
+/* Position within the OOB data of the page */
+#define NAND_BBM_POS_SMALL		5
+#define NAND_BBM_POS_LARGE		0
+
 /* Non chip related options */
 /* This option skips the bbt scan during initialization. */
 #define NAND_SKIP_BBTSCAN	0x00010000
@@ -1055,7 +1069,7 @@ struct nand_chip {
 
 	int subpagesize;
 	int onfi_timing_mode_default;
-	int badblockpos;
+	unsigned int badblockpos;
 	int badblockbits;
 
 	struct nand_id id;
-- 
2.17.1