diff options
| author | Mantas Pucka <mantas@8devices.com> | 2020-04-15 16:48:30 +0300 |
|---|---|---|
| committer | Tudor Ambarus <tudor.ambarus@microchip.com> | 2020-05-31 08:34:16 +0300 |
| commit | e8aec15dd5842b5b11b0e621a2293348d3574a61 (patch) | |
| tree | ab305cde3817e37dbc4da9f6fb9ac7fd9698e897 /drivers/mtd/spi-nor | |
| parent | 0fa712c9db96b2c453809f85614aa008740ca8ec (diff) | |
mtd: spi-nor: winbond: Fix 4-byte opcode support for w25q256
There are 2 different chips (w25q256fv and w25q256jv) that share
the same JEDEC ID. Only w25q256jv fully supports 4-byte opcodes.
Use SFDP header version to differentiate between them.
Fixes: 10050a02f7d5 ("mtd: spi-nor: Add 4B_OPCODES flag to w25q256")
Signed-off-by: Mantas Pucka <mantas@8devices.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Diffstat (limited to 'drivers/mtd/spi-nor')
| -rw-r--r-- | drivers/mtd/spi-nor/sfdp.c | 4 | ||||
| -rw-r--r-- | drivers/mtd/spi-nor/sfdp.h | 6 | ||||
| -rw-r--r-- | drivers/mtd/spi-nor/winbond.c | 29 |
3 files changed, 33 insertions, 6 deletions
diff --git a/drivers/mtd/spi-nor/sfdp.c b/drivers/mtd/spi-nor/sfdp.c index d67182c12c4a..55c0c508464b 100644 --- a/drivers/mtd/spi-nor/sfdp.c +++ b/drivers/mtd/spi-nor/sfdp.c @@ -21,10 +21,6 @@ #define SFDP_4BAIT_ID 0xff84 /* 4-byte Address Instruction Table */ #define SFDP_SIGNATURE 0x50444653U -#define SFDP_JESD216_MAJOR 1 -#define SFDP_JESD216_MINOR 0 -#define SFDP_JESD216A_MINOR 5 -#define SFDP_JESD216B_MINOR 6 struct sfdp_header { u32 signature; /* Ox50444653U <=> "SFDP" */ diff --git a/drivers/mtd/spi-nor/sfdp.h b/drivers/mtd/spi-nor/sfdp.h index f8198af43a63..7f9846b3a1ad 100644 --- a/drivers/mtd/spi-nor/sfdp.h +++ b/drivers/mtd/spi-nor/sfdp.h @@ -7,6 +7,12 @@ #ifndef __LINUX_MTD_SFDP_H #define __LINUX_MTD_SFDP_H +/* SFDP revisions */ +#define SFDP_JESD216_MAJOR 1 +#define SFDP_JESD216_MINOR 0 +#define SFDP_JESD216A_MINOR 5 +#define SFDP_JESD216B_MINOR 6 + /* Basic Flash Parameter Table */ /* diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c index 17deabad57e1..5062af10f138 100644 --- a/drivers/mtd/spi-nor/winbond.c +++ b/drivers/mtd/spi-nor/winbond.c @@ -8,6 +8,31 @@ #include "core.h" +static int +w25q256_post_bfpt_fixups(struct spi_nor *nor, + const struct sfdp_parameter_header *bfpt_header, + const struct sfdp_bfpt *bfpt, + struct spi_nor_flash_parameter *params) +{ + /* + * W25Q256JV supports 4B opcodes but W25Q256FV does not. + * Unfortunately, Winbond has re-used the same JEDEC ID for both + * variants which prevents us from defining a new entry in the parts + * table. + * To differentiate between W25Q256JV and W25Q256FV check SFDP header + * version: only JV has JESD216A compliant structure (version 5). + */ + if (bfpt_header->major == SFDP_JESD216_MAJOR && + bfpt_header->minor == SFDP_JESD216A_MINOR) + nor->flags |= SNOR_F_4B_OPCODES; + + return 0; +} + +static struct spi_nor_fixups w25q256_fixups = { + .post_bfpt = w25q256_post_bfpt_fixups, +}; + static const struct flash_info winbond_parts[] = { /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */ { "w25x05", INFO(0xef3010, 0, 64 * 1024, 1, SECT_4K) }, @@ -53,8 +78,8 @@ static const struct flash_info winbond_parts[] = { { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16, SECT_4K) }, { "w25q128", INFO(0xef4018, 0, 64 * 1024, 256, SECT_4K) }, { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512, - SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | - SPI_NOR_4B_OPCODES) }, + SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) + .fixups = &w25q256_fixups }, { "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) }, { "w25q256jw", INFO(0xef6019, 0, 64 * 1024, 512, |