Re: serial.c - start looking from 0x220 iomem_base ??

[Robert Woerle]

Richard B. Johnson schrieb:

> On Fri, 13 Feb 2004, Robert Woerle wrote:
>
>  
>
> > Hi
> >
> > I am having here a device  (Tablet PC ) sample with a serial resistive
> > touchscreen  .
> > Under Windows it comes up as COM1 at IO-Base 0x220 -0x227 IRQ 4 .
> > Now it seems that in linux the serial driver doesnt look for so "low"
> > I/O-Base `s .
> >
> > By hacking around by hardcoding the 0x220 somehwere in serial.c i get it
> > to detect a standard 16550 , but
> > unfortunately it then assumes that all ttySX have this base .
> > This is because of my hardcoded hack and the driver not looking for all
> > the rest mem bases.
> >
> > So the quesion is :
> > Where do i tell serial.o  to start lower ( at 0x220 ) to look for
> > controllers .. .??
> >
> >
> >
> > Pls also CC me directly since i am only monitoring this list .
> >    
>
> There are 4 de facto standard serial ports:
>
> COM1	0x3F8	IRQ4
> COM2	0x2F8	IRQ3
> COM3	0x3E8	IRQ4
> COM4	0x2E8	IRQ3
>
> If you have a port at 0x220, it is above the game-port area,
> but not where the kernel should "look for" serial devices.
> Therefore, you don't tell the kernel to, as you state, start
> lower. Instead, you tell the kernel where they are by putting
> them in the pnp_devices[] table.
>
>
>  
I tryed that now and added a device  like
ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0x0220),

but nothing happens ... it leaves the function saying
<7>"Leaving  probe_serial_pci() (probe finished)

What can i do ?
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