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. -- Tom
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