RE: devfs + PCI serial card = no extra serial ports

Ed Vance
2003-03-07T22:54:05Z

Hi Bryan,

What serial driver initialization messages do you get from dmesg?
Is the "MANY_PORTS" flag present in the list of enabled options?
Which distribution and rev level are you using?

Ed

-----Original Message-----
From: Bryan Whitehead [mailto:driver@jpl.nasa.gov]
Sent: Friday, March 07, 2003 2:55 PM
To: linux-kernel@vger.kernel.org
Cc: linux-newbie@vger.kernel.org
Subject: Re: devfs + PCI serial card = no extra serial ports

BTW, this is with 2.4.19 (kernel shipped with distro).... I'm willing to
test any patches / rebuild kernel to get this working.....

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
>
> 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
>
> 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!
>

--
Bryan Whitehead
SysAdmin - JPL - Interferometry Systems and Technology
Phone: 818 354 2903
driver@jpl.nasa.gov

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