Greetings!
I had trouble using SerialDxe.efi with BaseSerialPortLib16550 on a standard
PC com port (com1). The PC is an asrock motherboard running whatever EFI
bios it came with. I changed MdeModulePkg.dsc so that
BaseSerialPortLib16550 would be used instead of BaseSerialPortLibNull and
then rebuilt SerialDxe.efi and loaded and started it using
BootServices->{LoadImage,StartImage}.
Output works but input doesn't work, typed characters aren't received by
the uart. I looked at the code briefly and it seems like the uart isn't
initialized properly. I used this script to get input working (the
commands should be self explanatory, they're not efi shell commands though):
image SerialDxe.efi
outb 0x3fb 0x83
outw 0x3f8 1
outb 0x3fb 0x3
outb 0x3fc 0x3
Any chance it can be fixed upstream?
Thanks,
Jake
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