I have installed Openwrt on FritzBox 7490. All works fine (lan, etc..I have only to test wan/dsl but I will do this in the next month).
Only one problem, in the guide they said
"For making USB work, an renesas xhci firmware file (e.g. v2026) is needed and it should be copied to /lib/firmware/ (file name renesas_usb_fw.mem)."
I have download the firmware from here
I extract it and renamed
mv K2013080.mem /lib/firmware/renesas_usb_fw.mem
I reboot and..
[ 74.749700] xhci_hcd 0000:01:00.0: failed to load firmware renesas_usb_fw.mem: -145
[ 74.755970] xhci_hcd: probe of 0000:01:00.0 failed with error -145
No way to get usb?