On Thu, 2025-01-30 at 11:04 -0600, Tom Rini wrote: > On Thu, Jan 30, 2025 at 02:55:53PM +0100, Ferenc Fejes wrote: > > > Hi, > > > > Is it possible to use the serial port for u-boot networking? For example, > > given > > a restricted environment where the FIT image is available with ethernet > > firmware > > and drivers, so it is not possible to boot it with DHCP boot since there is > > no > > networking. Or simply the ethernet NIC has no u-boot driver at all. For such > > cases, I assume ymodem is recommended to download and boot the FIT image. > > > > However, experimenting with different images and debugging, it would be more > > convenient if serial could be used as both data and console channel. Is this > > possible? > > > > A simple example: > > 1. ppp on the host machine, with IP forward, NAT, etc. > > 2. u-boot establish a ppp connection over serial to the host > > 3. u-boot starts a netconsole session to the host > > 4. user can use netconsole and wget to download images > > > > I was thinking of PPP, but that's probably not supported by u-boot. Anything > > similar with RNDIS and USB CDC ACM? > > > > Thanks in advance for any hint! > > Typically we use x/y/zmodem for sending data over the serial port in > U-Boot as no, we do not have networking support via serial port. Thanks.
I see, thank you for the clarification.
