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

Bryan Whitehead
2003-03-07T23:08:07Z

> 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?

My boot messages say this:
Serial driver version 5.05c (2001-07-08) with HUB-6 MANY_PORTS MULTIPORT
SHARE_IRQ SERIAL_PCI ISAPNP enabled
ttyS00 at 0x03f8 (irq = 4) is a 16550A
ttyS01 at 0x02f8 (irq = 3) is a 16550A

It only sets up my built-into-motherboard serial ports. The add on card
gets ignored.

I would have thought with SERIAL_PCI enabled I would have no problem.
But it doesn't seem to be so.

doing the quick/dirty setserial stuff with my own mknod's work. but it's
a big "messy". I'd at least like to get this fixed so next kernel
version I don't need to do a quick hack todo something as simple as
getting a serial port working.

I can post my entire dmesg if needed allong with my complete /proc/pci.
I'm also willing to play with patches. (if this is already fixed in a
later kernel than 2.4.19 I'd be willing to give it a go).

> 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