I've been working on adding LEDE/OpenWrt support for the DGND3300v2 router by Netgear.
Using the tools provided with the GPL source and the Firmware Mod Kit, I've been able to create a firmware image that will flash and begin to boot, but will fail when initializing the ethernet switch.
To create my firmware image, I had to extract the SquashFS from a generic LEDE image for the 96358VW2 using FMK, then copy it to the GPL source directory. After running the ./build.sh script, I was left with a firmware that passed the bootloader verification tests and would successfully flash. I needed to do this because the kernel included in the GPL source doesn't seem to support the little endian filesystem created by the LEDE/OpenWrt build system.
If I try to use the SquashFS from the standard LEDE image, I get this error message on boot:
No filesystem could mount root, tried: squashfs msdos vfat fuseblk Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0) Rebooting in 1 seconds..
If I use my custom image, I can get it to boot this far:
VFS: Mounted root (squashfs filesystem) readonly. Freeing unused kernel memory: 108k freed Press the [f] key and hit [enter] to enter failsafe mode Press the , ,  or  key and hit [enter] to select the debug level ifconfig: SIOCGIFFLAGS: No such device open: No such file or directory open: No such file or directory open: No such file or directory
If I press f, I can enter LEDE failsafe mode, but have no network interfaces detected when running ifconfig -a.
This seems to be a result of using the stock kernel in my image, which lacks the b53 driver needed for the switch.
If I compile a compressed kernel using the LEDE/OpenWrt build system, then include it in an image using the method above, it fails to boot immediately and dumps info to the console in this format:
*** Press any key to stop auto run (3 seconds) *** Auto run second count down: 0 Booting from only image (0xbe060000) ... **Exception 32: EPC=80528D7C, Cause=80420B60 (Exc24 ) RA=00000000, VAddr=80420B60 0 ($00) = 66726F6D AT ($01) = 7920696D v0 ($02) = 28307862 v1 ($03) = 30303029 a0 ($04) = 0A000000 a1 ($05) = 00000000 a2 ($06) = 00000000 a3 ($07) = 00000000 t0 ($08) = 00000000 t1 ($09) = 80414350 t2 ($10) = 80528E0C t3 ($11) = 003DA000 t4 ($12) = 80528E0C t5 ($13) = 003DA000 t6 ($14) = 80412A2C t7 ($15) = 00000000 s0 ($16) = 00000000 s1 ($17) = 08300A00 s2 ($18) = 20736563 s3 ($19) = 636F756E s4 ($20) = 776E3A20 s5 ($21) = 756E2028 s6 ($22) = 636F6E64 s7 ($23) = 2A2A0A00 t8 ($24) = 00000000 t9 ($25) = 00000000 k0 ($26) = 00000000 k1 ($27) = 00000000 gp ($28) = 00000000 sp ($29) = 00000000 fp ($30) = 00000000 ra ($31) = 00000000
Has anyone encountered anything like this before, and if so, do you have any tips on what to do next?