[PATCH 19/25] mtd: spi-nor: winbond: Add support for W25Q12PW-Q/N
Miquel Raynal
miquel.raynal at bootlin.com
Wed Sep 9 08:25:50 PDT 2026
There is an ID collision with chips of same density from the JW family
(which it self conflicted with yet another family). Chips are very
similar in practice, it is mostly a matter of electrical differences
(mostly power consumption being lower) as well as the addition of inline
ECC capability.
16 bytes chunks are protected against single errors. In case a
non-aligned write happens, ECC is locally disabled until the next erase.
Another significant difference is that PW chips identify themselves as
supporting the new SFDP (rev F) QER field which forces an alternate
write SR2 opcode (0x31).
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef6018
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
534644500a0100ff00080117800000ffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520f9ffffffff0744eb086b083b42bbfeffffffffff
0000ffff44eb0c200f5210d80000162a010186e114c2e96376337a757a75
f7a2d55c39f66dffe930f8800000000000002c0000000000f6f4ffff0f00
0000060d44bd27ed080d
+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
c75ed992ea0351bcecb90f163e1e1c60134b42329bd5d243fb3b8b7fccc5f191 /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 0x03
mode cycles 0
dummy cycles 0
1S-1S-2S
opcode 0x3b
mode cycles 0
dummy cycles 8
1S-2S-2S
opcode 0xbb
mode cycles 2
dummy cycles 2
1S-1S-4S
opcode 0x6b
mode cycles 0
dummy cycles 8
1S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 4
4S-4S-4S
opcode 0xeb
mode cycles 2
dummy cycles 4
Supported page program modes by the flash
1S-1S-1S
opcode 0x02
1S-1S-4S
opcode 0x32
+ cat /sys/kernel/debug/spi-nor/spi0.0/params
name (null)
id ef 60 18 00 00 00
size 16.0 MiB
write size 16
page size 256
address nbytes 3
flags HAS_SR_TB | HAS_LOCK | SOFT_RESET | ECC | NO_WP | HAS_SR2_CMP_BIT6
opcodes
read 0xeb
dummy cycles 6
erase 0xd8
program 0x32
8D extension repeat
protocols
read 1S-4S-4S
write 1S-1S-4S
register 1S-1S-1S
erase commands
20 (4.00 KiB) [1]
52 (32.0 KiB) [2]
d8 (64.0 KiB) [3]
c7 (16.0 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-00ffffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00ffffff | unlocked | 64
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
[ 8.632646] 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
[ 12.751052] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
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
[ 16.108898] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_read
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca 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
[ 20.442758] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5 spi_read
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NANDFLASH
mtd.size = 16777216 (16M)
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: 0x1000000
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
[ 24.388330] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_read
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00ffffff | unlocked | 64
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x1000000
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
[ 26.058557] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
Copied 2097152 bytes from address 0x00000000 in flash to spi_read
+ sha256sum spi_read spi_test
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_read
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca 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
[ 28.495793] spi_nor_read [1882] [ret: 0] SR3 0x4 @ offset 0x0
Copied 2097152 bytes from address 0x00000000 in flash to spi_read2
+ sha256sum spi_read spi_read2 spi_test spi_test2
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_read
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_read2
25ff7ef1035a41d8af9df41ede8b2e77c8d3b5d2631188bdc3faa340030e92ca spi_test
cc82f5dade79cb7aaf1050756458b0c6033e7a043604afeee42721d9461e0cca spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00ffffff | locked | 64
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=16777216
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=64
+ ss=262144
+ bps=4
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 16252928 8
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00f7ffff | unlocked | 62
00f80000-00ffffff | locked | 2
+ flash_lock -u /dev/mtd0 16252928 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00fbffff | unlocked | 63
00fc0000-00ffffff | locked | 1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 8
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0007ffff | locked | 2
00080000-00ffffff | unlocked | 62
+ flash_lock -u /dev/mtd0 262144 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0003ffff | locked | 1
00040000-00ffffff | unlocked | 63
+ all_but_one=252
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 262144 252
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0003ffff | unlocked | 1
00040000-00ffffff | locked | 63
+ flash_lock -u /dev/mtd0 262144 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0007ffff | unlocked | 2
00080000-00ffffff | locked | 62
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 252
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00fbffff | locked | 63
00fc0000-00ffffff | unlocked | 1
+ flash_lock -u /dev/mtd0 16252928 4
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-00f7ffff | locked | 62
00f80000-00ffffff | unlocked | 2
---
drivers/mtd/spi-nor/winbond.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index bcae45df7416..76bd1a346fac 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -388,7 +388,7 @@ static const struct flash_info winbond_nor_parts[] = {
.flags = SPI_NOR_QUAD_PP | SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_HAS_CMP,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
}, {
- /* W25Q128FW-G/Q, W25Q128JW-Q/N */
+ /* W25Q128FW-G/Q, W25Q128JW-Q/N, W25Q12PW-Q/N */
.id = SNOR_ID(0xef, 0x60, 0x18),
.name = "w25q128fw",
.size = SZ_16M,
--
2.54.0
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