Fwd: Making a kmod

---------- Forwarded message ---------
From: Aryeh Friedman <aryeh.friedman@gmail.com>
Date: Sat, Oct 18, 2025 at 5:23 PM
Subject: Re: Making a kmod
To: Milan Obuch <freebsd-hackers@dino.sk>


On Sat, Oct 18, 2025 at 5:17 PM Milan Obuch <freebsd-hackers@dino.sk> wrote:
>
> On Sat, 18 Oct 2025 17:05:00 -0400
> Aryeh Friedman <aryeh.friedman@gmail.com> wrote:
>
> > I need to make a kernel mod that connects to a Vantech 2S1P PCIe
> > serial/par. combo card that has a 74LS02 hooked up to in roughly the
> > same way that I2C is interfaced to in lpbb(4) is for bit banging on
> > the LS02.   I got /dev/lpt0, etc. on the bhyve host I am used and have
> > passed it through and the guest sees the 2S1P but thats where I stand
> > and to farther it appears I neeed a kmod since the guest is seeing the
> > device but not attaching a driver:
> >
> > pci0: <simple comms, UART> at device 3.0 (no driver attached)
> > pci0: <simple comms, UART> at device 5.0 (no driver attached)
> > pci0: <simple comms, parallel port> at device 6.0 (no driver attached)
> >
> > none0@pci0:0:3:0:    class=0x070002 rev=0x00 hdr=0x00 vendor=0x9710
> > device=0x9912 subvendor=0xa000 subdevice=0x1000
> >     vendor     = 'MosChip Semiconductor Technology Ltd.'
> >     device     = 'PCIe 9912 Multi-I/O Controller'
> >     class      = simple comms
> >     subclass   = UART
> > none1@pci0:0:5:0:    class=0x070002 rev=0x00 hdr=0x00 vendor=0x9710
> > device=0x9912 subvendor=0xa000 subdevice=0x1000
> >     vendor     = 'MosChip Semiconductor Technology Ltd.'
> >     device     = 'PCIe 9912 Multi-I/O Controller'
> >     class      = simple comms
> >     subclass   = UART
> > none2@pci0:0:6:0:    class=0x070103 rev=0x00 hdr=0x00 vendor=0x9710
> > device=0x9912 subvendor=0xa000 subdevice=0x2000
> >     vendor     = 'MosChip Semiconductor Technology Ltd.'
> >     device     = 'PCIe 9912 Multi-I/O Controller'
> >     class      = simple comms
> >     subclass   = parallel port
> >
>
> Did you looked at puc driver? Off my head, MosChip devices are there,
> among other ones, some time ago I was able to add new board with simple
> addition of its description. I do not have the details of the board and
> necessary modification. I think it is really worth of some test, puc
> driver is designed for such cards.

Spent most of last night messing around with puc, ppt, etc. and got no
where even added this to /usr/src/sys/dev/puc/pucdata.c:

{ 0x9710, 0x9912, 0, 0, "MosChip Semiconductor Technology Ltd. PCIe
9912 Multi-I/O Controller", PUC_PORT_2S1P, 0, 0, 0 },



--
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org


-- 
Aryeh M. Friedman, Lead Developer, http://www.PetiteCloud.org