CH353 Serial PCI Card Drivers not attached

BBlister bblister at
Tue Jan 29 13:45:06 UTC 2019

Dear members,

I would like to add a PCI Serial card to one of my FreeBSD 12 boxes, in
order to be able to see the console of two other servers via serial null
modem cable. Towards this goal, I have bought a PCI serial card, that it is
being identified as:

none4 at pci0:4:0:0:       class=0x070002 card=0x32534348 chip=0x70534348
rev=0x10 hdr=0x00
    vendor     = 'WCH.CN'
    device     = 'CH353 PCI Dual Serial and Parallel Ports Controller'
    class      = simple comms
    subclass   = UART

Unfortunatelly, No driver is attached to this PCI card.

I am searching for a driver in order to use this dual serial port but until
now my quest has been unsuccessful. Do you have any hint of how I can use
this? Do you know if a linux driver exist for this in order to see if I
could port it to FreeBSD? Do you know any PCI Serial card that I could buy
on ebay or alliexpress that has a supported chipset by FreeBSD? Do you think
that the only way is to buy a set of Prolific USB to Serial adapters?

Thank you very much,

Yours sincerely,


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