[PATCH 12/15] mtd: spi-nor: winbond: Add support for W35T25NW-C/E
Miquel Raynal
miquel.raynal at bootlin.com
Fri Oct 2 05:21:25 PDT 2026
W35T devices are Winbond new octal DTR capable SPI-NORs.
16 bytes chunks are protected against single errors. In case a
non-aligned write happens, ECC is locally disabled until the next erase.
These chips may leverage lock CMP support, by using a Winbond specific
register instead of SR2 which is gone. This feature is therefore not
supported nor flagged.
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
Logs for W35T25NW-C:
********************
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef5b19
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
534644500a0104ff00080117800000ff84010102e00000ff05010106e800
00ff8701011c000100ff0a000108700100ffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe5208affffffff0f0000000000000000eeffffffffff
0000ffff00000c200f5210d800003452b50082e3144ce96376337a757a75
ffc3d55c008070ffe950f8a110cb088b0000ac0000000000ffffff860000
00000000000000000000ffffffff430ef0ff215cdcff000b0016b181b585
00d87b9d580b000030f6de9c10000000000000000000000000feffe300fe
ffe300058880060588a10070888400708885818501f0b1b501f0d8b8cefb
b02e2cd388a489aa00000000000000000000000000000000000000000000
000000000000000000000000000000000000000000000000000081850310
b1b503100000000000000601000000000000b1050000e700000000000000
00000000000000000000
+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
7dc00a62e47b0203b6adb38450098d68cecace4884e825796f884b0c4fcce121 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
+ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-8S
opcode 0x7c
mode cycles 0
dummy cycles 8
1S-8S-8S
opcode 0xcc
mode cycles 0
dummy cycles 16
8D-8D-8D
opcode 0x0b
mode cycles 0
dummy cycles 22
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
8D-8D-8D
opcode 0x12
+ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 5b 19 02 00 00
size 32.0 MiB
write size 16
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_SR_TB_BIT6 | HAS_4BIT_BP | IO_MODE_EN_VOLATILE | SOFT_RESET | ECC | NO_WP
opcodes
read 0x0b
dummy cycles 22
erase 0xdc
program 0x12
SR1 read 0x05
SR1 write 0x01
8D extension repeat
protocols
read 8D-8D-8D
write 8D-8D-8D
register 8D-8D-8D
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (32.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-01ffffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | unlocked | 512
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
2+0 records in
2+0 records out
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
+ sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_read
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_test
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NANDFLASH
mtd.size = 33554432 (32M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 16
mtd.oobsize = 0
regions = 0
+ alias 'show_sectors=grep -A4 "locked sectors" /sys/kernel/debug/spi-nor/spi0.0/params'
+ flash_lock -u /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x2000000
Lock status: unlocked
Return code: 0
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_read
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | unlocked | 512
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x2000000
Lock status: locked
Return code: 1
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_read
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_test
+ dd 'if=/dev/urandom' 'of=./spi_test2' 'bs=1M' 'count=2'
2+0 records in
2+0 records out
+ mtd_debug write /dev/mtd0 0 2097152 spi_test2
Copied 2097152 bytes from spi_test2 to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read2
Copied 2097152 bytes from address 0x00000000 in flash to spi_read2
+ sha256sum spi_read spi_read2 spi_test spi_test2
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_read
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_read2
8d3ebdc5576a51d5f2e6d9f132622ae9cc00919227e4fbce7c18fa2525392921 spi_test
f999d2e58cf596a1357e3337b36766bdb402cae729f224d8b952dbea6e46eee4 spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | locked | 512
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=33554432
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=512
+ ss=65536
+ bps=1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 33423360 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01fdffff | unlocked | 510
01fe0000-01ffffff | locked | 2
+ flash_lock -u /dev/mtd0 33423360 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01feffff | unlocked | 511
01ff0000-01ffffff | locked | 1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 25165824 128
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-017fffff | unlocked | 384
01800000-01ffffff | locked | 128
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | locked | 2
00020000-01ffffff | unlocked | 510
+ flash_lock -u /dev/mtd0 65536 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | locked | 1
00010000-01ffffff | unlocked | 511
Logs for W35T25NW-E:
********************
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef5b19
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp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+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
bcb73821a779a8a28f58a3c2e231894142037f04f90e22c7a0527081badeda43 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
+ cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
1S-1S-1S
opcode 0x13
mode cycles 0
dummy cycles 0
1S-1S-8S
opcode 0x7c
mode cycles 0
dummy cycles 8
1S-8S-8S
opcode 0xcc
mode cycles 0
dummy cycles 16
8D-8D-8D
opcode 0x0b
mode cycles 0
dummy cycles 22
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
8D-8D-8D
opcode 0x12
+ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 5b 19 02 00 00
size 32.0 MiB
write size 16
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_SR_TB_BIT6 | HAS_4BIT_BP | IO_MODE_EN_VOLATILE | SOFT_RESET | ECC | NO_WP
opcodes
read 0x0b
dummy cycles 22
erase 0xdc
program 0x12
SR1 read 0x05
SR1 write 0x01
8D extension repeat
protocols
read 8D-8D-8D
write 8D-8D-8D
register 8D-8D-8D
erase commands
21 (4.00 KiB) [1]
5c (32.0 KiB) [2]
dc (64.0 KiB) [3]
c7 (32.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-01ffffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | unlocked | 512
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
[ 15.836899] random: crng init done
2+0 records in
2+0 records out
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ hexdump spi_read
0000000 ffff ffff ffff ffff ffff ffff ffff ffff
*
0200000
+ sha256sum spi_read
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_read
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_test
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NANDFLASH
mtd.size = 33554432 (32M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 16
mtd.oobsize = 0
regions = 0
+ alias 'show_sectors=grep -A4 "locked sectors" /sys/kernel/debug/spi-nor/spi0.0/params'
+ flash_lock -u /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x2000000
Lock status: unlocked
Return code: 0
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug write /dev/mtd0 0 2097152 spi_test
Copied 2097152 bytes from spi_test to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_read
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | unlocked | 512
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x2000000
Lock status: locked
Return code: 1
+ mtd_debug erase /dev/mtd0 0 2097152
Erased 2097152 bytes from address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_read
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_test
+ dd 'if=/dev/urandom' 'of=./spi_test2' 'bs=1M' 'count=2'
2+0 records in
2+0 records out
+ mtd_debug write /dev/mtd0 0 2097152 spi_test2
Copied 2097152 bytes from spi_test2 to address 0x00000000 in flash
+ mtd_debug read /dev/mtd0 0 2097152 spi_read2
Copied 2097152 bytes from address 0x00000000 in flash to spi_read2
+ sha256sum spi_read spi_read2 spi_test spi_test2
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_read
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_read2
de381056136f8b252a3379e234ed001de3a44ab1bf4e1f7ac715197fbeea75d1 spi_test
4753383c1bb538600660c0d666594f8c9d821565994882212d463ffa46d08185 spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01ffffff | locked | 512
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=33554432
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=512
+ ss=65536
+ bps=1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 33423360 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01fdffff | unlocked | 510
01fe0000-01ffffff | locked | 2
+ flash_lock -u /dev/mtd0 33423360 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-01feffff | unlocked | 511
01ff0000-01ffffff | locked | 1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 25165824 128
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-017fffff | unlocked | 384
01800000-01ffffff | locked | 128
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | locked | 2
00020000-01ffffff | unlocked | 510
+ flash_lock -u /dev/mtd0 65536 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | locked | 1
00010000-01ffffff | unlocked | 511
---
drivers/mtd/spi-nor/winbond.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 0bb8e5a8c7c3..55b27bc7e467 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -628,6 +628,11 @@ static const struct flash_info winbond_nor_parts[] = {
/* W35T12NW-C */
.id = SNOR_ID(0xef, 0x5b, 0x18),
.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6,
+ }, {
+ /* W35T25NW-C/E */
+ .id = SNOR_ID(0xef, 0x5b, 0x19),
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 |
+ SPI_NOR_4BIT_BP,
}, {
/*
* Catch all entry to make sure all chips solely relying
--
2.55.0
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