[PATCH 4/5] mtd: spi-nor: winbond: Add support for W25Q02RV-M
Miquel Raynal
miquel.raynal at bootlin.com
Fri May 29 09:05:49 PDT 2026
There is an ID collision with the chip of same density from the JV
family. Both chips are very similar in practice, it is mostly a matter
of electrical differences (mostly power consumption being lower).
As a significant difference, RV chips identify themselves as supporting
the new SFDP (rev F) 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
ef7022
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
+ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
534644500a0101ff00080117800000ff84010102e00000ffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520fbffffffff7f44eb086b083b42bbfeffffffffff
0000ffff44eb0c200f5210d800001602a60081e214dde9e378477a757a75
f7a4d55c39f66dffe970f9a50000000000002c0c000000006655ffff0f00
0000060d44bd27ed080dffffffffff8a00fe21ffdcff
+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
fe929abb1ba38dd6a8668200051298a8140bfeb56bd6d58f56b86b074a150f12 /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-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 4
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 70 22 00 00 00
size 256 MiB
write size 1
page size 256
address nbytes 4
flags HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | 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 repeat
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 (256 MiB)
sector map
region (in hex) | erase mask | overlaid
------------------+------------+---------
00000000-0fffffff | [ 3] | no
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0fffffff | unlocked | 4096
+ dd 'if=/dev/urandom' 'of=./spi_test' 'bs=1M' 'count=2'
[ 11.527038] 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
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_read
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e 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
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 268435456 (256M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
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: 0x10000000
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
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_read
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0fffffff | unlocked | 4096
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x10000000
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
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_read
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e 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
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_read
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_read2
32e1a8def4cf674413ff0b7a2738e704f03f7bddcaf7ee2d320ab83aa7bf813e spi_test
4b1329df073cd497567d8cb6878aa20af6af71df98cc7c445d31a69eaf0d69f1 spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0fffffff | locked | 4096
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=268435456
+ cat /sys/class/mtd/mtd0/erasesize
+ bs=65536
+ grep unlocked /sys/kernel/debug/spi-nor/spi0.0/params
+ sed -e 's/.*unlocked | //'
+ nsectors=4096
+ ss=65536
+ bps=1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 268304384 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0ffdffff | unlocked | 4094
0ffe0000-0fffffff | locked | 2
+ flash_lock -u /dev/mtd0 268304384 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0ffeffff | unlocked | 4095
0fff0000-0fffffff | locked | 1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 260046848 128
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0f7fffff | unlocked | 3968
0f800000-0fffffff | 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
00020000-0fffffff | unlocked | 4094
+ 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
00010000-0fffffff | unlocked | 4095
+ all_but_one=4095
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 65536 4095
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0000ffff | unlocked | 1
00010000-0fffffff | locked | 4095
+ 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
------------------+----------+---------
00000000-0001ffff | unlocked | 2
00020000-0fffffff | locked | 4094
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 4095
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0ffeffff | locked | 4095
0fff0000-0fffffff | unlocked | 1
+ flash_lock -u /dev/mtd0 268304384 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
region (in hex) | status | #sectors
------------------+----------+---------
00000000-0ffdffff | locked | 4094
0ffe0000-0fffffff | unlocked | 2
---
drivers/mtd/spi-nor/winbond.c | 53 +++++++++++++++++++++++++++++++++++++------
1 file changed, 46 insertions(+), 7 deletions(-)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index f96a11531a09..04ba8fd44a6a 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -128,7 +128,9 @@ static int winbond_nor_multi_die_ready(struct spi_nor *nor)
}
static int
-winbond_nor_multi_die_post_sfdp_fixups(struct spi_nor *nor)
+winbond_nor_multi_die_post_sfdp_fixups(struct spi_nor *nor,
+ const struct sfdp_parameter_header *bfpt_header,
+ const struct sfdp_bfpt *bfpt)
{
/*
* SFDP supports dice numbers, but this information is only available in
@@ -142,8 +144,45 @@ winbond_nor_multi_die_post_sfdp_fixups(struct spi_nor *nor)
return 0;
}
-static const struct spi_nor_fixups winbond_nor_multi_die_fixups = {
- .post_sfdp = winbond_nor_multi_die_post_sfdp_fixups,
+static bool is_w25qxxrv(struct spi_nor *nor)
+{
+ struct sfdp_header *sfdp_h = (struct sfdp_header *)nor->sfdp->dwords;
+
+ /*
+ * W25QxxRV chips re-use the same ID as the W25QxxJV family.
+ *
+ * Chips are very similar, W25QxxRV brings mostly performance and power
+ * consumption improvements. The RV family does not require the multi
+ * die fixup.
+ *
+ * They can be distinguished based on their SFDP minor revision:
+ * W25QxxJV: JESD216A, minor revision == 05h
+ * W25Q512/01/02JV: JESD216B, minor revision == 06h
+ * W25QxxRV: JESD216F, minor revision >= 0Ah
+ */
+ return sfdp_h->minor >= SFDP_JESD216F_MINOR;
+}
+
+static int w25qxxjv_rv_post_bfpt_fixups(struct spi_nor *nor,
+ const struct sfdp_parameter_header *bfpt_header,
+ const struct sfdp_bfpt *bfpt)
+{
+ int ret;
+
+ if (!is_w25qxxrv(nor)) {
+ /* Only 1Gb and 2Gb variants are affected */
+ if (nor->params->size == SZ_128M || nor->params->size == SZ_256M) {
+ ret = winbond_nor_multi_die_post_sfdp_fixups(nor, bfpt_header, bfpt);
+ if (ret)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static const struct spi_nor_fixups w25qxxjv_rv_fixups = {
+ .post_bfpt = w25qxxjv_rv_post_bfpt_fixups,
};
static const struct flash_info winbond_nor_parts[] = {
@@ -230,7 +269,7 @@ static const struct flash_info winbond_nor_parts[] = {
.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,
+ .fixups = &w25qxxjv_rv_fixups,
}, {
.id = SNOR_ID(0xef, 0x50, 0x12),
.name = "w25q20bw",
@@ -317,13 +356,13 @@ static const struct flash_info winbond_nor_parts[] = {
.id = SNOR_ID(0xef, 0x70, 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,
+ .fixups = &w25qxxjv_rv_fixups,
}, {
- /* W25Q02JV-M */
+ /* W25Q02JV-M, W25Q02RV-M */
.id = SNOR_ID(0xef, 0x70, 0x22),
.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,
+ .fixups = &w25qxxjv_rv_fixups,
}, {
.id = SNOR_ID(0xef, 0x71, 0x19),
.name = "w25m512jv",
--
2.53.0
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