lkml.org 
[lkml]   [2003]   [Mar]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
SubjectRe: devfs + PCI serial card = no extra serial ports
From
On Fri, 7 Mar 2003, Bryan Whitehead wrote:

> It seems devfsd has an annoying "feature". I bought a PCI card to get a
> couple (2) more serial ports. The kernel doesn't seem to set up the
> serial ports at boot, so devfs never creates an entry. However, post
> boot, since there is no entries, I cannot configure the serial ports
> with setserial. So basically devfsd = no PCI based serial add on?
>
> 03:05.0 Serial controller: NetMos Technology 222N-2 I/O Card (2S+1P)
> (rev 01) (prog-if 02 [16550])
> Subsystem: LSI Logic / Symbios Logic (formerly NCR): Unknown device 0002
> Flags: medium devsel, IRQ 17
> I/O ports at ecf8 [size=8]
> I/O ports at ece8 [size=8]
> I/O ports at ecd8 [size=8]
> I/O ports at ecc8 [size=8]
> I/O ports at ecb8 [size=8]
> I/O ports at eca0 [size=16]
>
>
> mknod ttyS2 c 4 66
> mknod ttyS3 c 4 67
> setserial ttyS2 port 0xecf8 UART 16550A irq 17 Baud_base 9600
> setserial ttyS3 port 0xece8 UART 16550A irq 17 Baud_base 9600

Why are you messing with baud_base? Don't, unless you really know what
you are doing. A normal 16550a with baud_base set to 9600 will run at
115200 when an app tries to run it at 9600. baud_base is just the
quotient the serial driver uses to calculate the divisor needed to
run the UART at a given speed.
>
> I hoped after "setting up" the serial ports with setserial some magic
> would happen and they would apear in /dev/tts... but I was wrong.
>
> gets me working serial ports... but it's not in /dev... :O
>
can you not make them? As in:

#mknod /dev/tts/5 c 4 69
...

> Am I just screwed?
>
> If so, what would be a good add on PCI based solution for more serial
> ports that WORKS with devfsd? (I don't want to disable devfs as this
> opens up a different set of problems)
>
> Thanks for any replay!
>
>
Lawson
--
---oops---

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.068 / U:0.156 seconds]
©2003-2014 Jasper Spaans. Advertise on this site