mtd: nand: Make flags for bad block marker position more granular

To be able to check and set bad block markers in the first and
second page of a block independently of each other, we create
separate flags for both cases.

Previously NAND_BBM_SECONDPAGE meant, that both, the first and the
second page were used. With this patch NAND_BBM_FIRSTPAGE stands for
using the first page and NAND_BBM_SECONDPAGE for using the second
page.

This patch is only for preparation of subsequent changes and does
not implement the logic to actually handle both flags separately.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: Boris Brezillon <bbrezillon@kernel.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>

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->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	return 0;
 }

drivers/mtd/nand/raw/nand_base.c

@@ -299,7 +299,8 @@ static int nand_block_bad(struct nand_chip *chip, loff_t ofs)
 		ofs += mtd->erasesize - mtd->writesize;
 
 	page = (int)(ofs >> chip->page_shift) & chip->pagemask;
-	page_end = page + ((chip->options & NAND_BBM_SECONDPAGE) ? 2 : 1);
+	page_end = page + (((chip->options & NAND_BBM_FIRSTPAGE) &&
+			    (chip->options & NAND_BBM_SECONDPAGE)) ? 2 : 1);
 
 	for (; page < page_end; page++) {
 		res = chip->ecc.read_oob(chip, page);
@@ -516,7 +517,8 @@ static int nand_default_block_markbad(struct nand_chip *chip, loff_t ofs)
 
 		i++;
 		ofs += mtd->writesize;
-	} while ((chip->options & NAND_BBM_SECONDPAGE) && i < 2);
+	} while ((chip->options & NAND_BBM_FIRSTPAGE) &&
+		 (chip->options & NAND_BBM_SECONDPAGE) && i < 2);
 
 	return ret;
 }

drivers/mtd/nand/raw/nand_bbt.c

@@ -468,7 +468,8 @@ static int create_bbt(struct nand_chip *this, uint8_t *buf,
 
 	pr_info("Scanning device for bad blocks\n");
 
-	if (this->options & NAND_BBM_SECONDPAGE)
+	if ((this->options & NAND_BBM_FIRSTPAGE) &&
+	    (this->options & NAND_BBM_SECONDPAGE))
 		numpages = 2;
 	else
 		numpages = 1;

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->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	return 0;
 }

drivers/mtd/nand/raw/nand_hynix.c

@@ -690,7 +690,7 @@ static int hynix_nand_init(struct nand_chip *chip)
 	if (!nand_is_slc(chip))
 		chip->options |= NAND_BBM_LASTPAGE;
 	else
-		chip->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	hynix = kzalloc(sizeof(*hynix), GFP_KERNEL);
 	if (!hynix)

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->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	macronix_nand_fix_broken_get_timings(chip);
 

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->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	ondie = micron_supports_on_die_ecc(chip);
 

drivers/mtd/nand/raw/nand_samsung.c

@@ -133,7 +133,7 @@ static int samsung_nand_init(struct nand_chip *chip)
 	if (!nand_is_slc(chip))
 		chip->options |= NAND_BBM_LASTPAGE;
 	else
-		chip->options |= NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	return 0;
 }

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->options |=  NAND_BBM_SECONDPAGE;
+		chip->options |= NAND_BBM_FIRSTPAGE | 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 &&

drivers/mtd/nand/raw/sh_flctl.c

@@ -1177,7 +1177,7 @@ static int flctl_probe(struct platform_device *pdev)
 	if (pdata->flcmncr_val & SEL_16BIT)
 		nand->options |= NAND_BUSWIDTH_16;
 
-	nand->options |= NAND_BBM_SECONDPAGE;
+	nand->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	pm_runtime_enable(&pdev->dev);
 	pm_runtime_resume(&pdev->dev);

include/linux/mtd/rawnand.h

@@ -176,6 +176,7 @@ enum nand_ecc_algo {
  * Position within the block: Each of these pages needs to be checked for a
  * bad block marking pattern.
  */
+#define NAND_BBM_FIRSTPAGE		0x01000000
 #define NAND_BBM_SECONDPAGE		0x02000000
 #define NAND_BBM_LASTPAGE		0x04000000