8fb46725cf
Specify 4-bit ECC strength instead of 8-bit, to resolve NAND I/O errors
on ELECOM WRC-X3000GS2.
ELECOM WRC-X3000GS2 has a Macronix MX35UF1G24AD SPI-NAND chip as a flash
storage. That chip is registered as a chip that has 128 bytes OOB and
requires 8-bit ECC, and described as the same in the Macronix's datasheet.
But on WRC-X3000GS2, 8-bit ECC breaks NAND I/O on mtdblock devices with
the following errors and 4-bit ECC needs to be used to resolve this issue.
current (ECC strength=8):
```
[ 1.401566] 0x000000480000-0x000000500000 : "0:appsblenv"
[ 1.407128] 1 fixed-partitions partitions found on MTD device 0:appsblenv
[ 1.410663] Creating 1 MTD partitions on "0:appsblenv":
[ 1.417359] 0x000000000000-0x000000040000 : "env-data"
[ 1.479865] u-boot-env-layout: probe of 79b0000.qpic-nand:flash@0:partitions:partition-0-appsblenv:partition@0:nvmem-layout failed with error -74
root@OpenWrt:~# strings /dev/mtdblock10
[ 55.693754] mtdblock: MTD device '0:appsblenv' is NAND, please consider using UBI block devices instead.
[ 55.694660] I/O error, dev mtdblock10, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 4 prio class 2
[ 55.703147] I/O error, dev mtdblock10, sector 8 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 2
[ 55.711884] I/O error, dev mtdblock10, sector 16 op 0x0:(READ) flags 0x80700 phys_seg 2 prio class 2
[ 55.720778] I/O error, dev mtdblock10, sector 24 op 0x0:(READ) flags 0x80700 phys_seg 1 prio class 2
[ 55.730310] I/O error, dev mtdblock10, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
[ 55.738607] Buffer I/O error on dev mtdblock10, logical block 0, async page read
```
after fixing (ECC strength=4):
```
[ 1.402301] 0x000000480000-0x000000500000 : "0:appsblenv"
[ 1.407909] 1 fixed-partitions partitions found on MTD device 0:appsblenv
[ 1.411370] Creating 1 MTD partitions on "0:appsblenv":
[ 1.418075] 0x000000000000-0x000000040000 : "env-data"
(no error)
root@OpenWrt:~# strings /dev/mtdblock10
[ 39.131008] mtdblock: MTD device '0:appsblenv' is NAND, please consider using UBI block devices instead.
bootcmd=bootipq
baudrate=115200
wifi2=7C:F8:54:01:BD:F3
CRASH_COUNT=0
...
```
Fixes:
|
||
|---|---|---|
| .devcontainer/ci-env | ||
| .github | ||
| .vscode | ||
| config | ||
| include | ||
| LICENSES | ||
| package | ||
| scripts | ||
| target | ||
| toolchain | ||
| tools | ||
| .gitattributes | ||
| .gitignore | ||
| BSDmakefile | ||
| Config.in | ||
| COPYING | ||
| feeds.conf.default | ||
| Makefile | ||
| README.md | ||
| rules.mk | ||
OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.
Sunshine!
Download
Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.
If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.
An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:
Development
To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.
Requirements
You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.
binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which
Quickstart
-
Run
./scripts/feeds update -ato obtain all the latest package definitions defined in feeds.conf / feeds.conf.default -
Run
./scripts/feeds install -ato install symlinks for all obtained packages into package/feeds/ -
Run
make menuconfigto select your preferred configuration for the toolchain, target system & firmware packages. -
Run
maketo build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.
Related Repositories
The main repository uses multiple sub-repositories to manage packages of
different categories. All packages are installed via the OpenWrt package
manager called opkg. If you're looking to develop the web interface or port
packages to OpenWrt, please find the fitting repository below.
-
LuCI Web Interface: Modern and modular interface to control the device via a web browser.
-
OpenWrt Packages: Community repository of ported packages.
-
OpenWrt Routing: Packages specifically focused on (mesh) routing.
-
OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).
Support Information
For a list of supported devices see the OpenWrt Hardware Database
Documentation
Support Community
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- Support Chat: Channel
#openwrton oftc.net.
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