[PATCH 15/30] mtd: spi-nor: winbond: W25Q01JV-Q/N: Fill locking information
From: Miquel Raynal
Date: Fri May 29 2026 - 11:47:10 EST
The SFDP table does not advertize the locking capabilities of the
device, flag these capabilities.
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
---
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef4021
$ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450060101ff00060110800000ff84000102d00000ff03000102f000
00ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520fbffffffff3f44eb086b083b42bbfeffffffffff
0000ffff40eb0c200f5210d800003602a60082ea14e2e96376337a757a75
f7a2d55c19f74dffe970f9a5ffffffffffffffffffffffffffffffffff0a
f0ff21ffdcff
$ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
c733cf105c5f05ed23ad3a32c2a72c1a09d4b895c628db52e645a8a457dfc7d6 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
$ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/
jedec_id manufacturer sfdp
$ sha256sum /sys/kernel/debug/spi-nor/spi0.0/capabilities
6204c70963ab07f9865d051b888679ce34ad3a9f167fbbd4a2a6e0c3d0ce4cdf /sys/kernel/debug/spi-nor/spi0.0/capabilities
$ 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-2S
opcode 0x3c
mode cycles 0
dummy cycles 8
1S-2S-2S
opcode 0xbc
mode cycles 2
dummy cycles 2
1S-1S-4S
opcode 0x6c
mode cycles 0
dummy cycles 8
1S-4S-4S
opcode 0xec
mode cycles 2
dummy cycles 4
4S-4S-4S
opcode 0xec
mode cycles 2
dummy cycles 0
Supported page program modes by the flash
1S-1S-1S
opcode 0x12
1S-1S-4S
opcode 0x34
$ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 40 21 00 00 00
size 128 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | NO_READ_CR | HAS_SR_TB_BIT6 | HAS_4BIT_BP | SOFT_RESET | NO_WP | HAS_SR2_CMP_BIT6
opcodes
read 0xec
dummy cycles 6
erase 0xdc
program 0x34
8D extension none
protocols
read 1S-4S-4S
write 1S-1S-4S
register 1S-1S-1S
erase commands
21 (4.00 KiB) [1]
dc (64.0 KiB) [3]
c7 (128 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-07ffffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07ffffff | unlocked | 2048
$ dd if=/dev/urandom of=./spi_test bs=1M count=2
2+0 records in
2+0 records out
$ flash_lock -u /dev/mtd0
$ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x8000000
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*
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_read
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_test
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07ffffff | unlocked | 2048
$ flash_lock -l /dev/mtd0
$ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x8000000
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*
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_read
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f 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*
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_read
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_read2
3fa6e836be5a072bd2d4ae538559dce20b14c5827ccc0cf6df783c0c35a4a83f spi_test
367809dbdff878d023d3a1a8526a6382759a3ec78aa6289d18577d15f013d44f spi_test2
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07ffffff | locked | 2048
$ flash_lock -u /dev/mtd0
$ nsectors=$(grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params | sed -e 's/.
*unlocked | //')
$ ss=$(($size / $nsectors))
$ bps=$(($ss / $bs))
$ flash_lock -u /dev/mtd0
$ flash_lock -l /dev/mtd0 $(($size - (2 * $ss))) $((2 * $bps)) # last two
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07fdffff | unlocked | 2046
07fe0000-07ffffff | locked | 2
$ flash_lock -u /dev/mtd0 $(($size - (2 * $ss))) $((1 * $bps)) # last one
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07feffff | unlocked | 2047
07ff0000-07ffffff | locked | 1
$ flash_lock -u /dev/mtd0
$ flash_lock -l /dev/mtd0 $(($size - (2**7 * $ss))) $((2**7 * $bps))
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-077fffff | unlocked | 1920
07800000-07ffffff | locked | 128
$ flash_lock -u /dev/mtd0
$ flash_lock -l /dev/mtd0 0 $((2 * $bps)) # first two
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | locked | 2
00020000-07ffffff | unlocked | 2046
$ flash_lock -u /dev/mtd0 $ss $((1 * $bps)) # first one
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | locked | 1
00010000-07ffffff | unlocked | 2047
$ flash_lock -l /dev/mtd0 $ss $all_but_one # all but the first
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | unlocked | 1
00010000-07ffffff | locked | 2047
$ flash_lock -u /dev/mtd0 $ss $(($ss / $bs)) # all but the two first
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0001ffff | unlocked | 2
00020000-07ffffff | locked | 2046
$ flash_lock -u /dev/mtd0
$ flash_lock -l /dev/mtd0 0 $all_but_one # same from the other side
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07feffff | locked | 2047
07ff0000-07ffffff | unlocked | 1
$ flash_lock -u /dev/mtd0 $(($size - (2 * $ss))) $(($ss / $bs)) # all but two
$ show_sectors
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-07fdffff | locked | 2046
07fe0000-07ffffff | unlocked | 2
---
drivers/mtd/spi-nor/winbond.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 2e5b488818c8..f1c86d4ba216 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -227,6 +227,8 @@ static const struct flash_info winbond_nor_parts[] = {
}, {
/* W25Q01JV-Q/N */
.id = SNOR_ID(0xef, 0x40, 0x21),
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 |
+ SPI_NOR_4BIT_BP | SPI_NOR_HAS_CMP,
.fixups = &winbond_nor_multi_die_fixups,
}, {
.id = SNOR_ID(0xef, 0x50, 0x12),
--
2.53.0