linux-kernel - [PATCH 2/6] mtd: spi-nor: Add spansion_post_sfdp

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Message-ID: <20190731091145.27374-3-tudor.ambarus@microchip.com>
Date:   Wed, 31 Jul 2019 09:12:10 +0000
From:   <Tudor.Ambarus@...rochip.com>
To:     <boris.brezillon@...labora.com>, <marek.vasut@...il.com>,
        <vigneshr@...com>
CC:     <dwmw2@...radead.org>, <computersforpeace@...il.com>,
        <miquel.raynal@...tlin.com>, <richard@....at>,
        <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <boris.brezillon@...tlin.com>, <Tudor.Ambarus@...rochip.com>
Subject: [PATCH 2/6] mtd: spi-nor: Add spansion_post_sfdp_fixups()

From: Boris Brezillon <boris.brezillon@...tlin.com>

Add a spansion_post_sfdp_fixups() function to fix the erase opcode,
erase sector size and set the SNOR_F_4B_OPCODES flag.
This way, all spansion related quirks are placed in the
spansion_post_sfdp_fixups() function.

Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
---
 drivers/mtd/spi-nor/spi-nor.c | 44 +++++++++++++++++++++++++++++--------------
 1 file changed, 30 insertions(+), 14 deletions(-)

diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 2c2d13060427..30f9d524e72f 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -737,18 +737,6 @@ static u8 spi_nor_convert_3to4_erase(u8 opcode)
 
 static void spi_nor_set_4byte_opcodes(struct spi_nor *nor)
 {
-	/* Do some manufacturer fixups first */
-	switch (JEDEC_MFR(nor->info)) {
-	case SNOR_MFR_SPANSION:
-		/* No small sector erase for 4-byte command set */
-		nor->erase_opcode = SPINOR_OP_SE;
-		nor->mtd.erasesize = nor->info->sector_size;
-		break;
-
-	default:
-		break;
-	}
-
 	nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
 	nor->program_opcode = spi_nor_convert_3to4_program(nor->program_opcode);
 	nor->erase_opcode = spi_nor_convert_3to4_erase(nor->erase_opcode);
@@ -4451,9 +4439,38 @@ static void spi_nor_default_init_params(struct spi_nor *nor,
 	spi_nor_init_uniform_erase_map(map, erase_mask, params->size);
 }
 
+static void spansion_post_sfdp_fixups(struct spi_nor *nor)
+{
+	struct mtd_info *mtd = &nor->mtd;
+
+	if (mtd->size <= SZ_16M)
+		return;
+
+	nor->flags |= SNOR_F_4B_OPCODES;
+	/* No small sector erase for 4-byte command set */
+	nor->erase_opcode = SPINOR_OP_SE;
+	nor->mtd.erasesize = nor->info->sector_size;
+}
+
+static void
+spi_nor_manufacturer_post_sfdp_fixups(struct spi_nor *nor,
+				      struct spi_nor_flash_parameter *params)
+{
+	switch (JEDEC_MFR(nor->info)) {
+	case SNOR_MFR_SPANSION:
+		spansion_post_sfdp_fixups(nor);
+		break;
+
+	default:
+		break;
+	}
+}
+
 static void spi_nor_post_sfdp_fixups(struct spi_nor *nor,
 				     struct spi_nor_flash_parameter *params)
 {
+	spi_nor_manufacturer_post_sfdp_fixups(nor, params);
+
 	if (nor->info->fixups && nor->info->fixups->post_sfdp)
 		return nor->info->fixups->post_sfdp(nor, params);
 }
@@ -4934,8 +4951,7 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
 		nor->addr_width = 3;
 	}
 
-	if (info->flags & SPI_NOR_4B_OPCODES ||
-	    (JEDEC_MFR(info) == SNOR_MFR_SPANSION && mtd->size > SZ_16M))
+	if (info->flags & SPI_NOR_4B_OPCODES)
 		nor->flags |= SNOR_F_4B_OPCODES;
 
 	if (nor->addr_width == 4 && nor->flags & SNOR_F_4B_OPCODES &&
-- 
2.9.5