Hi, On 29 December 2016 at 15:26, Yousong Zhou <yszhou4t...@gmail.com> wrote: > I believe the situation at the moment for WRT400N is like this > > - factory image is broken and will brick the device because the utility > wrt400n will truncate the kernel to 1MB. > - sysupgrade image is missing from snapshots because the kernel size is too > big exceeding the size limit imposed by "linux" part of mtdparts >
Please consider picking these 2 patches into the lede-17.01 branch as wrt400n firmwares made with current code are bound to fail. I made a patchwork bundle in case it may help: http://patchwork.ozlabs.org/bundle/yousong/wrt400n/ yousong > Lifting size limits of mtdparts is easy. I was more interested in figuring > out > where did that 0x100000 and 0x2fffc4 limit for factory image come from. > > Here are my finding After checking with content of OEM SDK, I believe that > only > crc32sum of the whole firmware was checked and the other 2 crc32sums for > kernel > and rootfs were only written to nvram without actually being checked. However > I did find a utility named 'read_fw' using the same limit as the old wrt400n > here, but it seems that it's just a read-only utility for synthesizing a > factory from /dev/mtd{2,3}. > > Maybe someone with serial console attached to this device can give the patch a > try. Bear in mind though it may brick your device and so you MUST prepare > before hand how to do the unbrick. > > Google Drive link for ready-made firmwares: > > https://drive.google.com/drive/folders/0B0ollk-mJJJAaTJmb01hb1pjejg > > v3 <- v2 > > - Changed from RFT to PATCH (thanks to Frank Horowitz for testing the > RFT v2 version) > - Rebased on current master (use pad-to instead of append-kernel with > blocksize) > - wrt400n: add size limit check on kernel and rootfs part as required > by OEM system > > v2 <- v0: > > - fix crc32 seed value for crc32sum of whole file > - fix output file permission bits > - fix fw_totalsize calculation > - 0xff as the last byte of ih.magic > > > Yousong Zhou (2): > tools: wrt400n: fix making factory images with kernel bigger than 1MB > ar71xx: wrt400n: lift size limit on kernel and rootfs part > > .../ar71xx/files/arch/mips/ath79/mach-wrt400n.c | 12 +- > target/linux/ar71xx/image/generic.mk | 22 + > target/linux/ar71xx/image/legacy-devices.mk | 5 - > target/linux/ar71xx/image/legacy.mk | 11 - > tools/firmware-utils/src/wrt400n.c | 463 > +++++++++------------ > 5 files changed, 221 insertions(+), 292 deletions(-) > > -- > 2.6.4 > _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
