linux-kernel - [PATCH 2/2] mtd: spinand: probe Winbond W25N01GV/W using param page

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Message-Id: <20220414143426.723168-3-gch981213@gmail.com>
Date:   Thu, 14 Apr 2022 22:34:26 +0800
From:   Chuanhong Guo <gch981213@...il.com>
To:     linux-mtd@...ts.infradead.org
Cc:     Chuanhong Guo <gch981213@...il.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Boris Brezillon <boris.brezillon@...labora.com>,
        Christophe Kerello <christophe.kerello@...s.st.com>,
        Mark Brown <broonie@...nel.org>,
        Daniel Palmer <daniel@...f.com>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 2/2] mtd: spinand: probe Winbond W25N01GV/W using param page

The JEDEC ID of EFAA21 is assigned to both W25N01G and W25N01K.
Probing the chip with JEDEC ID isn't reliable anymore. Use parameter
page instead.

Signed-off-by: Chuanhong Guo <gch981213@...il.com>
---
 drivers/mtd/nand/spi/onfi.c    |  4 +++-
 drivers/mtd/nand/spi/winbond.c | 25 ++++++++++++++++---------
 include/linux/mtd/spinand.h    |  3 +++
 3 files changed, 22 insertions(+), 10 deletions(-)

diff --git a/drivers/mtd/nand/spi/onfi.c b/drivers/mtd/nand/spi/onfi.c
index 5cc888e3d038..27484e0cd22d 100644
--- a/drivers/mtd/nand/spi/onfi.c
+++ b/drivers/mtd/nand/spi/onfi.c
@@ -141,7 +141,9 @@ static void nand_bit_wise_majority(const void **srcbufs, unsigned int nsrcbufs,
 	}
 }
 
-static const struct spinand_manufacturer *spinand_onfi_manufacturers[] = {};
+static const struct spinand_manufacturer *spinand_onfi_manufacturers[] = {
+	&winbond_onfi_spinand_manufacturer,
+};
 
 static const struct spinand_onfi_info *
 spinand_onfi_chip_match(struct nand_onfi_params *p,
diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 76684428354e..601316c80b3e 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -85,15 +85,15 @@ static const struct spinand_info winbond_spinand_table[] = {
 		     0,
 		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL),
 		     SPINAND_SELECT_TARGET(w25m02gv_select_target)),
-	SPINAND_INFO("W25N01GV",
-		     SPINAND_ID(SPINAND_READID_METHOD_OPCODE_DUMMY, 0xaa),
-		     NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
-		     NAND_ECCREQ(1, 512),
-		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
-					      &write_cache_variants,
-					      &update_cache_variants),
-		     0,
-		     SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
+};
+
+static const struct spinand_onfi_info winbond_spinand_onfi_table[] = {
+	SPINAND_ONFI_INFO(SPINAND_ONFI_MODELS("W25N01GV", "W25N01GW"),
+			  SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+						   &write_cache_variants,
+						   &update_cache_variants),
+			  0,
+			  SPINAND_ECCINFO(&w25m02gv_ooblayout, NULL)),
 };
 
 static int winbond_spinand_init(struct spinand_device *spinand)
@@ -125,3 +125,10 @@ const struct spinand_manufacturer winbond_spinand_manufacturer = {
 	.nchips = ARRAY_SIZE(winbond_spinand_table),
 	.ops = &winbond_spinand_manuf_ops,
 };
+
+const struct spinand_manufacturer winbond_onfi_spinand_manufacturer = {
+	.name = "Winbond",
+	.onfi_chips = winbond_spinand_onfi_table,
+	.nchips = ARRAY_SIZE(winbond_spinand_onfi_table),
+	.ops = &winbond_spinand_manuf_ops,
+};
diff --git a/include/linux/mtd/spinand.h b/include/linux/mtd/spinand.h
index dc218082d773..610320b03773 100644
--- a/include/linux/mtd/spinand.h
+++ b/include/linux/mtd/spinand.h
@@ -268,6 +268,9 @@ extern const struct spinand_manufacturer paragon_spinand_manufacturer;
 extern const struct spinand_manufacturer toshiba_spinand_manufacturer;
 extern const struct spinand_manufacturer winbond_spinand_manufacturer;
 
+/* SPI NAND manufacturers with ONFI parameter page support */
+extern const struct spinand_manufacturer winbond_onfi_spinand_manufacturer;
+
 /**
  * struct spinand_op_variants - SPI NAND operation variants
  * @ops: the list of variants for a given operation
-- 
2.35.1