[PATCH v2] mtd: spi-nor: Add support for BoHong bh25q128as
Christian Marangi
ansuelsmth at gmail.com
Tue Feb 20 12:03:23 PST 2024
From: David Bauer <mail at david-bauer.net>
Add MTD support for the BoHong bh25q128as SPI NOR chip.
The chip has 16MB of total capacity, divided into a total of 256
sectors, each 64KB sized. The chip also supports 4KB sectors.
Additionally, it supports dual and quad read modes.
Datasheet is public and can be found at the referenced link.
Functionality was verified on an Tenbay WR1800K / MTK MT7621 board.
Link: https://www.e-interlink.com.tw/userUpload/files/BH25Q128AS_v1_0.pdf
Signed-off-by: David Bauer <mail at david-bauer.net>
[ reworked to new flash_info format ]
Signed-off-by: Christian Marangi <ansuelsmth at gmail.com>
---
Read/write/erase test are done by flashing and installing an OpenWrt
image on the spi and by using overlayfs on it confirming correct
read/write.
root at OpenWrt:/tmp/tmp2# cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
bh25q128as
root at OpenWrt:/tmp/tmp2# cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
684018
root at OpenWrt:/tmp/tmp2# cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
bohong
root at OpenWrt:/# xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450000101ff00000109300000ff68000103600000ffffffffffffff
ffffffffffffffffffffffffffffffffffffe520f1ffffffff0744eb086b
083b42bbeeffffffffff00ffffff44eb0c200f5210d800ffffffffffffff
ffffffffffff003600279ef97764fcebffff
root at OpenWrt:/# sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
e2e374124e998c9c430a5a4c368ded374186637f48301dcb3943b81af2987995 /sys/bus/spi/devices/spi0.0/spi-np
root at OpenWrt:/tmp/tmp2# hexdump -Cv /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
00000000 53 46 44 50 00 01 01 ff 00 00 01 09 30 00 00 ff |SFDP........0...|
00000010 68 00 01 03 60 00 00 ff ff ff ff ff ff ff ff ff |h...`...........|
00000020 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000030 e5 20 f1 ff ff ff ff 07 44 eb 08 6b 08 3b 42 bb |. ......D..k.;B.|
00000040 ee ff ff ff ff ff 00 ff ff ff 44 eb 0c 20 0f 52 |..........D.. .R|
00000050 10 d8 00 ff ff ff ff ff ff ff ff ff ff ff ff ff |................|
00000060 00 36 00 27 9e f9 77 64 fc eb ff ff |.6.'..wd....|
0000006c
root at OpenWrt:/tmp/tmp2# sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
e2e374124e998c9c430a5a4c368ded374186637f48301dcb3943b81af2987995 /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
root at OpenWrt:/tmp/tmp2# 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
Supported page program modes by the flash
1S-1S-1S
opcode 0x02
root at OpenWrt:/tmp/tmp2# cat /sys/kernel/debug/spi-nor/spi0.0/params
name bh25q128as
id 68 40 18
size 16.0 MiB
write size 1
page size 256
address nbytes 3
flags HAS_16BIT_SR
opcodes
read 0x03
dummy cycles 0
erase 0xd8
program 0x02
8D extension none
protocols
read 1S-1S-1S
write 1S-1S-1S
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 | flags
------------------+------------+----------
00000000-00ffffff | [ 123] |
Changes v2:
- Drop wrong copyright header
- Drop name
- Add requested info about sfpd and others
drivers/mtd/spi-nor/Makefile | 1 +
drivers/mtd/spi-nor/bohong.c | 18 ++++++++++++++++++
drivers/mtd/spi-nor/core.c | 1 +
drivers/mtd/spi-nor/core.h | 1 +
4 files changed, 21 insertions(+)
create mode 100644 drivers/mtd/spi-nor/bohong.c
diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 5e68468b72fc..c8849cf5124f 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -2,6 +2,7 @@
spi-nor-objs := core.o sfdp.o swp.o otp.o sysfs.o
spi-nor-objs += atmel.o
+spi-nor-objs += bohong.o
spi-nor-objs += eon.o
spi-nor-objs += esmt.o
spi-nor-objs += everspin.o
diff --git a/drivers/mtd/spi-nor/bohong.c b/drivers/mtd/spi-nor/bohong.c
new file mode 100644
index 000000000000..8ba4f3a32040
--- /dev/null
+++ b/drivers/mtd/spi-nor/bohong.c
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/mtd/spi-nor.h>
+
+#include "core.h"
+
+static const struct flash_info bohong_parts[] = {
+ {
+ .id = SNOR_ID(0x68, 0x40, 0x18),
+ .size = SZ_16M,
+ .no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+ },
+};
+
+const struct spi_nor_manufacturer spi_nor_bohong = {
+ .parts = bohong_parts,
+ .nparts = ARRAY_SIZE(bohong_parts),
+};
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 4129764fad8c..29c28ee683a1 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2037,6 +2037,7 @@ int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor)
static const struct spi_nor_manufacturer *manufacturers[] = {
&spi_nor_atmel,
+ &spi_nor_bohong,
&spi_nor_eon,
&spi_nor_esmt,
&spi_nor_everspin,
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index d36c0e072954..c293568ae827 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -601,6 +601,7 @@ struct sfdp {
/* Manufacturer drivers. */
extern const struct spi_nor_manufacturer spi_nor_atmel;
+extern const struct spi_nor_manufacturer spi_nor_bohong;
extern const struct spi_nor_manufacturer spi_nor_eon;
extern const struct spi_nor_manufacturer spi_nor_esmt;
extern const struct spi_nor_manufacturer spi_nor_everspin;
--
2.43.0
More information about the linux-mtd
mailing list