[PATCH 4/6] mtd: spi-nor: winbond: Add support for W25H512NWxxAM chips

[Miquel Raynal]

These chips must be described as none of the block protection
information are discoverable. This chip supports 4 bits plus the
top/bottom addressing capability to identify the protected blocks.

Cc: stable at vger.kernel.org
Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
cat: can't open '/sys/bus/spi/devices/spi0.0/spi-nor/partname': No such file or directory
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
efa020
$ cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
winbond
$ xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450060101ff00060110800000ff84000102d00000ffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffe520fbffffffff1f44eb086b083b42bbfeffffffffff
0000ffff40eb0c200f5210d800003302a60081e714d9e96376337a757a75
f7bdd55c19f75dffe970f9a5ffffffffffffffffffffffffffffffffff0a
f0ff21ffdcff
$ sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
07b7eff0cc6e637cbe3282c0ee75bd23e0da622ca26319238c07bcb4d677fb34  /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
$ cat /sys/kernel/debug/spi-nor/spi0.0/params
name		(null)
id		ef a0 20 00 00 00
size		64.0 MiB
write size	1
page size	256
address nbytes	4
flags		HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | HAS_SR_TB_BIT6 | HAS_4BIT_BP | SOFT_RESET | NO_WP

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 (64.0 MiB)

sector map
 region (in hex)   | erase mask | overlaid
 ------------------+------------+---------
 00000000-03ffffff |     [   3] | no
$ 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
$ 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*
40a9f42f218c8f909eb9f13e5edb964be55d5a962a91ad54f6b1dcf51ca637ad  spi_read
40a9f42f218c8f909eb9f13e5edb964be55d5a962a91ad54f6b1dcf51ca637ad  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*
4bda3a28f4ffe603c0ec1258c0034d65a1a0d35ab7bd523a834608adabf03cc5  spi_read
40a9f42f218c8f909eb9f13e5edb964be55d5a962a91ad54f6b1dcf51ca637ad  spi_test
$ mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 67108864 (64M)
mtd.erasesize = 65536 (64K)
mtd.writesize = 1
mtd.oobsize = 0
regions = 0
---
 drivers/mtd/spi-nor/winbond.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index a65cbbccbbac64c83227c8158ff85abfa3441868..781ca0abfcdca2dc883e33bfa5c164623cf0905d 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -355,6 +355,10 @@ static const struct flash_info winbond_nor_parts[] = {
 		/* W25Q02NWxxIM */
 		.id = SNOR_ID(0xef, 0x80, 0x22),
 		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 | SPI_NOR_4BIT_BP,
+	}, {
+		/* W25H512NWxxAM */
+		.id = SNOR_ID(0xef, 0xa0, 0x20),
+		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 | SPI_NOR_4BIT_BP,
 	},
 };
 

-- 
2.51.0