From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.bootlin.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gUr2d-0006ZX-17 for linux-mtd@lists.infradead.org; Thu, 06 Dec 2018 10:38:00 +0000 From: Boris Brezillon To: Tudor Ambarus , Marek Vasut Cc: Alexandre Belloni , David Woodhouse , Brian Norris , Boris Brezillon , Richard Weinberger , linux-mtd@lists.infradead.org, "Sverdlin, Alexander (Nokia - DE/Ulm)" Subject: [PATCH v5 1/3] mtd: spi-nor: Add the SNOR_F_4B_OPCODES flag Date: Thu, 6 Dec 2018 11:37:34 +0100 Message-Id: <20181206103736.5957-2-boris.brezillon@bootlin.com> In-Reply-To: <20181206103736.5957-1-boris.brezillon@bootlin.com> References: <20181206103736.5957-1-boris.brezillon@bootlin.com> List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Some flash_info entries have the SPI_NOR_4B_OPCODES flag set to let the core know that the flash supports 4B opcode. While this solution works fine for id-based caps detection, it doesn't work that well when relying on SFDP-based caps detection. Let's add an SNOR_F_4B_OPCODES flag so that the SFDP parsing code can set it when appropriate. Signed-off-by: Boris Brezillon --- Changes in v5: - Cosmetic changes Changes in v4: - Set SNOR_F_4B_OPCODES flag outside of the if (mtd->size > 0x1000000) block - Do not set SNOR_F_4B_OPCODES when BFPT_DWORD1_ADDRESS_BYTES_4_ONLY, because 4byte only does not imply 4B opcodes are supported Changes in v3: - Clear SNOR_F_4B_OPCODES flag when SFDP fails - Add Alexandre R-b Changes in v2: - Fix the commit message - Fix the ->addr_width check - Add a comma at the end of the SNOR_F_4B_OPCODES definition --- drivers/mtd/spi-nor/spi-nor.c | 21 +++++++++++---------- include/linux/mtd/spi-nor.h | 1 + 2 files changed, 12 insertions(+), 10 deletions(-) diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c index 8f07430ffffa..bea122e0d731 100644 --- a/drivers/mtd/spi-nor/spi-nor.c +++ b/drivers/mtd/spi-nor/spi-nor.c @@ -3272,6 +3272,7 @@ static int spi_nor_init_params(struct spi_nor *nor, if (spi_nor_parse_sfdp(nor, &sfdp_params)) { nor->addr_width = 0; + nor->flags &= ~SNOR_F_4B_OPCODES; /* restore previous erase map */ memcpy(&nor->erase_map, &prev_map, sizeof(nor->erase_map)); @@ -3572,9 +3573,7 @@ static int spi_nor_init(struct spi_nor *nor) } } - if ((nor->addr_width == 4) && - (JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) && - !(nor->info->flags & SPI_NOR_4B_OPCODES)) { + if (nor->addr_width == 4 && !(nor->flags & SNOR_F_4B_OPCODES)) { /* * If the RESET# pin isn't hooked up properly, or the system * otherwise doesn't perform a reset command in the boot @@ -3606,10 +3605,8 @@ static void spi_nor_resume(struct mtd_info *mtd) void spi_nor_restore(struct spi_nor *nor) { /* restore the addressing mode */ - if ((nor->addr_width == 4) && - (JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) && - !(nor->info->flags & SPI_NOR_4B_OPCODES) && - (nor->flags & SNOR_F_BROKEN_RESET)) + if (nor->addr_width == 4 && !(nor->flags & SNOR_F_4B_OPCODES) && + nor->flags & SNOR_F_BROKEN_RESET) set_4byte(nor, nor->info, 0); } EXPORT_SYMBOL_GPL(spi_nor_restore); @@ -3765,13 +3762,17 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, } else if (mtd->size > 0x1000000) { /* enable 4-byte addressing if the device exceeds 16MiB */ nor->addr_width = 4; - if (JEDEC_MFR(info) == SNOR_MFR_SPANSION || - info->flags & SPI_NOR_4B_OPCODES) - spi_nor_set_4byte_opcodes(nor, info); } else { nor->addr_width = 3; } + if (info->flags & SPI_NOR_4B_OPCODES || + (JEDEC_MFR(info) == SNOR_MFR_SPANSION && mtd->size > SZ_16M)) + nor->flags |= SNOR_F_4B_OPCODES; + + if (nor->addr_width == 4 && nor->flags & SNOR_F_4B_OPCODES) + spi_nor_set_4byte_opcodes(nor, info); + if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) { dev_err(dev, "address width is too large: %u\n", nor->addr_width); diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h index 8b1acf68b7ac..981d628305a2 100644 --- a/include/linux/mtd/spi-nor.h +++ b/include/linux/mtd/spi-nor.h @@ -237,6 +237,7 @@ enum spi_nor_option_flags { SNOR_F_READY_XSR_RDY = BIT(4), SNOR_F_USE_CLSR = BIT(5), SNOR_F_BROKEN_RESET = BIT(6), + SNOR_F_4B_OPCODES = BIT(7), }; /** -- 2.17.1