On Sat, Jan 17, 2004 at 06:19:59PM -0800, Kent Ip wrote:
> Hi Greg,
>  
> I read your post in linux-kernel archive.
> I am working on a target board running Linux with USB
> only and without serial port.
> I want to direct the Linux console the USB port, so
> that i can remote control it on PC.

That is not possible to do without any extra hardware.

You can do this if you use a usb to serial converter that Linux
supports.

> Now, i can send the shell output to PC side by running
> following command on target board:
> sh -i > /dev/myUSB
> 
> However, would you share with me some ideas on how to
> replace serial port by USB port in a more complete
> way? e.g. seeing bootup message, input/output console
> thru USB port...

It's possible (we do support console messages on USB to Serial devices)
in the 2.6 kernel, but in reality, it's pointless (USB starts up too
late in the boot process, interupts are needed so you can't capture oops
messages, the devices are slow, have no buffer, etc.)

I suggest you get a serial connection for your target device.

Good luck,

greg k-h


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