Adding support for MosChip 9912 PCIe (serial/parallel) cards

[Andre Albsmeier]

On Sat, 03-Mar-2018 at 10:53:20 -0500, Daniel Eischen wrote:
> On Sat, 3 Mar 2018, Andre Albsmeier wrote:
> 
> > On Fri, 02-Mar-2018 at 08:36:40 -0500, Daniel Eischen wrote:
> >> On Fri, 2 Mar 2018, Andre Albsmeier wrote:
> >>
> >>> I have a MosChip 9912 card (PCIe card with 1 parallel and 2 serial
> >>> ports) sitting here which does not get detected on 11.1. I tried
> >>> to simply add it to the uart and ppc drivers with
> >>>
> >> [ ... ]
> >>
> >> Do you try adding similar support to puc_pci_devices[] in
> >> sys/dev/puc/pucdata.c?
> >
> > Just tried that:
> >
> > @@ -1204,6 +1204,11 @@
> >            PUC_PORT_1S1P, 0x10, 4, 0,
> >        },
> >
> > +{   0x9710, 0x9912, 0xa000, 0x3012,
> > +    "NetMos NM9912 Dual UART and 1284 Printer port",
> > +    DEFAULT_RCLK,
> > +    PUC_PORT_2S1P, 0x10, 4, 0,
> > +},
> >        {   0x9710, 0x9865, 0xa000, 0x3012,
> >            "NetMos NM9865 Dual UART and 1284 Printer port",
> >            DEFAULT_RCLK,
> >
> > But the results are exactly the same. It also doesn't
> > matter if puc.ko is loaded at all.
> 
> Are you sure your subvendor and subdevice are correct?  I would

No ;-). I have to use: 0x9710, 0x9912, 0xa000, 0x2000,

Now I have the following behaviour:

When I load puc.ko I get:
puc0: <NetMos NM9912 Dual UART and 1284 Printer port> at device 0.2 on pci9

If I load ppc.ko now, I get:
ppc0: parallel port not found.

But if I unload puc and ppc and load ppc again, I get:

ppc0: <MosChip MCS9912 PCIe to Peripheral Controller> port 0xd000-0xd007,0xd008-0xd00f mem 0x89200000-0x89200fff irq 20 at device 0.2 on pci9
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
ppbus0: <Parallel port bus> on ppc0
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port

For all this I have to disable /boot/device.hints -- otherwise
the messages "driver bug: Unable to set devclass" comes back.

So I think there are two problems:

First the settings of the ISA stuff in /boot/device.hints conflicted
with the settings the driver probed. This would be easy to solve --
just disable them in /boot/device.hints.

Second it appears that ppc only attaches if puc did some kind of
initialisation first. But we have to detach puc so the ppc can attach.

	-Andre