On Tue, Jan 9, 2024 at 4:52 AM John Crispin <j...@phrozen.org> wrote: > ---SNIP--- > > * Why is there no USB 3.x host port on the device? > - the USB 3.x and PCIe buses are shared in the selected SoC silicon, > hence only a single High-Speed USB port is available
Perhaps you've already considered this, but it may be possible to route the shared PCIe/USB 3 traces to both an M.2 slot and a USB 3 host port using a high-speed dual-channel differential 1:2/2:1 switch/mux. It wouldn't enable both interfaces to be used at the same time, but it would make it possible to select which interface is enabled using a GPIO pin. Then U-boot could either automatically enable one port or the other depending on what devices it detects (e.g., enable PCIe and disable USB 3 if a PCIe device is connected, otherwise enable USB 3 and disable PCIe), or it could be statically configurable via a U-boot environment variable. From some quick searching, the switches/muxes that would enable this cost less than $1 each in qty. 1000. For a <$100 product I understand that may be too much of an increase to the BoM cost and PCB complexity, but I think users would really appreciate being able to choose between being able to add an M.2 SSD, WiFi card, or SATA controller and being able to plug in a USB 3.x 2.5 GbE adapter, SSD/flash drive, WiFi dongle, or 5G modem. All the best, Forest _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
