[PATCH v3 09/23] mtd: spi-nor: winbond: Add support for W25Q32RV-Q/N

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 <[email protected]>
---
+ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
ef4016
+ 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
ffffffffffffffffe520f9ffffffff0144eb086b083b42bbfeffffffffff
0000ffff44eb0c200f5210d800001432010183e314c2e96376337a757a75
f7a2d55c39f66dffe930f8800000000000002c0000000000f6f4ffff0f00
0000060d44bd27ed080d
+ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
2c0c54d6e360dae30b72615eac5f0faff59463aeb2237d46d08d6cfd77d6c9f6  /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/p[   84.112272] random: crng init done
arams
name		(null)
id		ef 40 16 00 00 00
size		4.00 MiB
write size	1
page size	256
address nbytes	3
flags		HAS_SR_TB | HAS_LOCK | SOFT_RESET | 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 (4.00 MiB)

sector map
 region (in hex)   | erase mask | overlaid
 ------------------+------------+---------
 00000000-003fffff |     [   3] | no

locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003fffff | unlocked | 64
+ 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
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_read
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  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
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_test
+ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 4194304 (4M)
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: 0x400000
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
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_read
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_test
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003fffff | unlocked | 64
+ flash_lock -l /dev/mtd0
+ flash_lock -i /dev/mtd0
Device: /dev/mtd0
Start: 0
Len: 0x400000
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
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_read
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  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
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_read
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_read2
9f76d5d40e1d8fc620967a019cc0cf223a3b11cf9c5bed9a02fb8e2c06b1c805  spi_test
831e9e5cc6efa7d3afe7b0584100549d93b9953d64ad237fd1df15f790f23ae6  spi_test2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003fffff |   locked | 64
+ flash_lock -u /dev/mtd0
+ cat /sys/class/mtd/mtd0/size
+ size=4194304
+ 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=65536
+ bps=1
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 4063232 2
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003dffff | unlocked | 62
 003e0000-003fffff |   locked | 2
+ flash_lock -u /dev/mtd0 4063232 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003effff | unlocked | 63
 003f0000-003fffff |   locked | 1
+ 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
 00020000-003fffff | unlocked | 62
+ 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
 00010000-003fffff | unlocked | 63
+ all_but_one=63
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 65536 63
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-0000ffff | unlocked | 1
 00010000-003fffff |   locked | 63
+ 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
 00020000-003fffff |   locked | 62
+ flash_lock -u /dev/mtd0
+ flash_lock -l /dev/mtd0 0 63
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003effff |   locked | 63
 003f0000-003fffff | unlocked | 1
+ flash_lock -u /dev/mtd0 4063232 1
+ grep -A4 'locked sectors' /sys/kernel/debug/spi-nor/spi0.0/params
locked sectors
 region (in hex)   | status   | #sectors
 ------------------+----------+---------
 00000000-003dffff |   locked | 62
 003e0000-003fffff | 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 8c1cad9e21b4..69c02732d5db 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -243,7 +243,7 @@ static const struct flash_info winbond_nor_parts[] = {
 		.size = SZ_1M,
 		.no_sfdp_flags = SECT_4K,
 	}, {
-		/* W25Q32JV-Q/N */
+		/* W25Q32JV-Q/N, W25Q32RV-Q/N */
 		.id = SNOR_ID(0xef, 0x40, 0x16),
 		.name = "w25q32",
 		.size = SZ_4M,

-- 
2.54.0